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[mirror_ubuntu-bionic-kernel.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
230da36a
TN		 599static void record_sockaddr_info(struct sockaddr_storage *addr_info,
600 nes_addr_t *ip_addr, u16 *port_num)
601{
602 struct sockaddr_in *in_addr = (struct sockaddr_in *)addr_info;
603
604 if (in_addr->sin_family == AF_INET) {
605 *ip_addr = ntohl(in_addr->sin_addr.s_addr);
606 *port_num = ntohs(in_addr->sin_port);
607 }
608}
609
5647263c
TN		 610/*
611 * nes_record_pm_msg - Save the received mapping info
612 */
613static void nes_record_pm_msg(struct nes_cm_info *cm_info,
614 struct iwpm_sa_data *pm_msg)
615{
230da36a
TN		 616 record_sockaddr_info(&pm_msg->mapped_loc_addr,
617 &cm_info->mapped_loc_addr, &cm_info->mapped_loc_port);
618
619 record_sockaddr_info(&pm_msg->mapped_rem_addr,
620 &cm_info->mapped_rem_addr, &cm_info->mapped_rem_port);
621}
622
623/*
624 * nes_get_reminfo - Get the address info of the remote connecting peer
625 */
626static int nes_get_remote_addr(struct nes_cm_node *cm_node)
627{
628 struct sockaddr_storage mapped_loc_addr, mapped_rem_addr;
629 struct sockaddr_storage remote_addr;
630 int ret;
631
632 nes_create_sockaddr(htonl(cm_node->mapped_loc_addr),
633 htons(cm_node->mapped_loc_port), &mapped_loc_addr);
634 nes_create_sockaddr(htonl(cm_node->mapped_rem_addr),
635 htons(cm_node->mapped_rem_port), &mapped_rem_addr);
636
637 ret = iwpm_get_remote_info(&mapped_loc_addr, &mapped_rem_addr,
638 &remote_addr, RDMA_NL_NES);
639 if (ret)
640 nes_debug(NES_DBG_CM, "Unable to find remote peer address info\n");
641 else
642 record_sockaddr_info(&remote_addr, &cm_node->rem_addr,
643 &cm_node->rem_port);
644 return ret;
5647263c
TN		 645}
646
3c2d774c
GS		 647/**
648 * print_core - dump a cm core
649 */
650static void print_core(struct nes_cm_core *core)
651{
652 nes_debug(NES_DBG_CM, "---------------------------------------------\n");
653 nes_debug(NES_DBG_CM, "CM Core -- (core = %p )\n", core);
654 if (!core)
655 return;
656 nes_debug(NES_DBG_CM, "---------------------------------------------\n");
3c2d774c 657
615eb715 658 nes_debug(NES_DBG_CM, "State : %u \n", core->state);
3c2d774c 659
3c2d774c
GS		 660 nes_debug(NES_DBG_CM, "Listen Nodes : %u \n", atomic_read(&core->listen_node_cnt));
661 nes_debug(NES_DBG_CM, "Active Nodes : %u \n", atomic_read(&core->node_cnt));
662
663 nes_debug(NES_DBG_CM, "core : %p \n", core);
664
665 nes_debug(NES_DBG_CM, "-------------- end core ---------------\n");
666}
667
4ac79a70
TN		 668static void record_ird_ord(struct nes_cm_node *cm_node,
669 u16 conn_ird, u16 conn_ord)
670{
671 if (conn_ird > NES_MAX_IRD)
672 conn_ird = NES_MAX_IRD;
673
674 if (conn_ord > NES_MAX_ORD)
675 conn_ord = NES_MAX_ORD;
676
677 cm_node->ird_size = conn_ird;
678 cm_node->ord_size = conn_ord;
679}
680
615eb715
TN		 681/**
682 * cm_build_mpa_frame - build a MPA V1 frame or MPA V2 frame
683 */
684static int cm_build_mpa_frame(struct nes_cm_node *cm_node, u8 **start_buff,
685 u16 *buff_len, u8 *pci_mem, u8 mpa_key)
686{
687 int ret = 0;
688
689 *start_buff = (pci_mem) ? pci_mem : &cm_node->mpa_frame_buf[0];
690
691 switch (cm_node->mpa_frame_rev) {
692 case IETF_MPA_V1:
693 *start_buff = (u8 *)*start_buff + sizeof(struct ietf_rtr_msg);
694 *buff_len = sizeof(struct ietf_mpa_v1) + cm_node->mpa_frame_size;
695 build_mpa_v1(cm_node, *start_buff, mpa_key);
696 break;
697 case IETF_MPA_V2:
698 *buff_len = sizeof(struct ietf_mpa_v2) + cm_node->mpa_frame_size;
699 build_mpa_v2(cm_node, *start_buff, mpa_key);
700 break;
701 default:
702 ret = -EINVAL;
703 }
704 return ret;
705}
706
707/**
708 * build_mpa_v2 - build a MPA V2 frame
709 */
710static void build_mpa_v2(struct nes_cm_node *cm_node,
711 void *start_addr, u8 mpa_key)
712{
713 struct ietf_mpa_v2 *mpa_frame = (struct ietf_mpa_v2 *)start_addr;
714 struct ietf_rtr_msg *rtr_msg = &mpa_frame->rtr_msg;
8dd87fba
TN		 715 u16 ctrl_ird;
716 u16 ctrl_ord;
615eb715
TN		 717
718 /* initialize the upper 5 bytes of the frame */
719 build_mpa_v1(cm_node, start_addr, mpa_key);
720 mpa_frame->flags |= IETF_MPA_V2_FLAG; /* set a bit to indicate MPA V2 */
721 mpa_frame->priv_data_len += htons(IETF_RTR_MSG_SIZE);
722
723 /* initialize RTR msg */
4ac79a70
TN		 724 if (cm_node->mpav2_ird_ord == IETF_NO_IRD_ORD) {
725 ctrl_ird = IETF_NO_IRD_ORD;
726 ctrl_ord = IETF_NO_IRD_ORD;
727 } else {
728 ctrl_ird = cm_node->ird_size & IETF_NO_IRD_ORD;
729 ctrl_ord = cm_node->ord_size & IETF_NO_IRD_ORD;
730 }
8dd87fba
TN		 731 ctrl_ird |= IETF_PEER_TO_PEER;
732 ctrl_ird |= IETF_FLPDU_ZERO_LEN;
615eb715
TN		 733
734 switch (mpa_key) {
735 case MPA_KEY_REQUEST:
8dd87fba
TN		 736 ctrl_ord |= IETF_RDMA0_WRITE;
737 ctrl_ord |= IETF_RDMA0_READ;
615eb715
TN		 738 break;
739 case MPA_KEY_REPLY:
740 switch (cm_node->send_rdma0_op) {
741 case SEND_RDMA_WRITE_ZERO:
8dd87fba 742 ctrl_ord |= IETF_RDMA0_WRITE;
615eb715
TN		 743 break;
744 case SEND_RDMA_READ_ZERO:
8dd87fba 745 ctrl_ord |= IETF_RDMA0_READ;
615eb715
TN		 746 break;
747 }
748 }
8dd87fba
TN		 749 rtr_msg->ctrl_ird = htons(ctrl_ird);
750 rtr_msg->ctrl_ord = htons(ctrl_ord);
615eb715
TN		 751}
752
753/**
754 * build_mpa_v1 - build a MPA V1 frame
755 */
756static void build_mpa_v1(struct nes_cm_node *cm_node, void *start_addr, u8 mpa_key)
757{
758 struct ietf_mpa_v1 *mpa_frame = (struct ietf_mpa_v1 *)start_addr;
759
760 switch (mpa_key) {
761 case MPA_KEY_REQUEST:
762 memcpy(mpa_frame->key, IEFT_MPA_KEY_REQ, IETF_MPA_KEY_SIZE);
763 break;
764 case MPA_KEY_REPLY:
765 memcpy(mpa_frame->key, IEFT_MPA_KEY_REP, IETF_MPA_KEY_SIZE);
766 break;
767 }
768 mpa_frame->flags = IETF_MPA_FLAGS_CRC;
769 mpa_frame->rev = cm_node->mpa_frame_rev;
770 mpa_frame->priv_data_len = htons(cm_node->mpa_frame_size);
771}
772
773static void build_rdma0_msg(struct nes_cm_node *cm_node, struct nes_qp **nesqp_addr)
774{
775 u64 u64temp;
776 struct nes_qp *nesqp = *nesqp_addr;
777 struct nes_hw_qp_wqe *wqe = &nesqp->hwqp.sq_vbase[0];
778
43adff39 779 u64temp = (unsigned long)nesqp->nesuqp_addr;
615eb715
TN		 780 u64temp |= NES_SW_CONTEXT_ALIGN >> 1;
781 set_wqe_64bit_value(wqe->wqe_words, NES_IWARP_SQ_WQE_COMP_CTX_LOW_IDX, u64temp);
782
783 wqe->wqe_words[NES_IWARP_SQ_WQE_FRAG0_LOW_IDX] = 0;
784 wqe->wqe_words[NES_IWARP_SQ_WQE_FRAG0_HIGH_IDX] = 0;
785
786 switch (cm_node->send_rdma0_op) {
787 case SEND_RDMA_WRITE_ZERO:
788 nes_debug(NES_DBG_CM, "Sending first write.\n");
789 wqe->wqe_words[NES_IWARP_SQ_WQE_MISC_IDX] =
790 cpu_to_le32(NES_IWARP_SQ_OP_RDMAW);
791 wqe->wqe_words[NES_IWARP_SQ_WQE_TOTAL_PAYLOAD_IDX] = 0;
792 wqe->wqe_words[NES_IWARP_SQ_WQE_LENGTH0_IDX] = 0;
793 wqe->wqe_words[NES_IWARP_SQ_WQE_STAG0_IDX] = 0;
794 break;
795
796 case SEND_RDMA_READ_ZERO:
797 default:
079abea6
JL		 798 if (cm_node->send_rdma0_op != SEND_RDMA_READ_ZERO)
799 WARN(1, "Unsupported RDMA0 len operation=%u\n",
800 cm_node->send_rdma0_op);
615eb715
TN		 801 nes_debug(NES_DBG_CM, "Sending first rdma operation.\n");
802 wqe->wqe_words[NES_IWARP_SQ_WQE_MISC_IDX] =
803 cpu_to_le32(NES_IWARP_SQ_OP_RDMAR);
804 wqe->wqe_words[NES_IWARP_SQ_WQE_RDMA_TO_LOW_IDX] = 1;
805 wqe->wqe_words[NES_IWARP_SQ_WQE_RDMA_TO_HIGH_IDX] = 0;
806 wqe->wqe_words[NES_IWARP_SQ_WQE_RDMA_LENGTH_IDX] = 0;
807 wqe->wqe_words[NES_IWARP_SQ_WQE_RDMA_STAG_IDX] = 1;
808 wqe->wqe_words[NES_IWARP_SQ_WQE_STAG0_IDX] = 1;
809 break;
810 }
811
812 if (nesqp->sq_kmapped) {
813 nesqp->sq_kmapped = 0;
814 kunmap(nesqp->page);
815 }
816
817 /*use the reserved spot on the WQ for the extra first WQE*/
818 nesqp->nesqp_context->ird_ord_sizes &= cpu_to_le32(~(NES_QPCONTEXT_ORDIRD_LSMM_PRESENT |
819 NES_QPCONTEXT_ORDIRD_WRPDU |
820 NES_QPCONTEXT_ORDIRD_ALSMM));
821 nesqp->skip_lsmm = 1;
822 nesqp->hwqp.sq_tail = 0;
823}
3c2d774c
GS		 824
825/**
826 * schedule_nes_timer
827 * note - cm_node needs to be protected before calling this. Encase in:
828 * rem_ref_cm_node(cm_core, cm_node);add_ref_cm_node(cm_node);
829 */
830int schedule_nes_timer(struct nes_cm_node *cm_node, struct sk_buff *skb,
615eb715
TN		 831 enum nes_timer_type type, int send_retrans,
832 int close_when_complete)
3c2d774c 833{
615eb715 834 unsigned long flags;
6492cdf3 835 struct nes_cm_core *cm_core = cm_node->cm_core;
3c2d774c
GS		 836 struct nes_timer_entry *new_send;
837 int ret = 0;
3c2d774c
GS		 838
839 new_send = kzalloc(sizeof(*new_send), GFP_ATOMIC);
840 if (!new_send)
9d5ab133 841 return -ENOMEM;
3c2d774c
GS		 842
843 /* new_send->timetosend = currenttime */
844 new_send->retrycount = NES_DEFAULT_RETRYS;
845 new_send->retranscount = NES_DEFAULT_RETRANS;
846 new_send->skb = skb;
847 new_send->timetosend = jiffies;
848 new_send->type = type;
849 new_send->netdev = cm_node->netdev;
850 new_send->send_retrans = send_retrans;
851 new_send->close_when_complete = close_when_complete;
852
853 if (type == NES_TIMER_TYPE_CLOSE) {
615eb715 854 new_send->timetosend += (HZ / 10);
9d5ab133 855 if (cm_node->recv_entry) {
79fc3d74 856 kfree(new_send);
9d5ab133
FL		 857 WARN_ON(1);
858 return -EINVAL;
859 }
860 cm_node->recv_entry = new_send;
3c2d774c
GS		 861 }
862
863 if (type == NES_TIMER_TYPE_SEND) {
b30db1c1 864 new_send->seq_num = ntohl(tcp_hdr(skb)->seq);
3c2d774c 865 atomic_inc(&new_send->skb->users);
6492cdf3
FL		 866 spin_lock_irqsave(&cm_node->retrans_list_lock, flags);
867 cm_node->send_entry = new_send;
868 add_ref_cm_node(cm_node);
869 spin_unlock_irqrestore(&cm_node->retrans_list_lock, flags);
870 new_send->timetosend = jiffies + NES_RETRY_TIMEOUT;
3c2d774c
GS		 871
872 ret = nes_nic_cm_xmit(new_send->skb, cm_node->netdev);
873 if (ret != NETDEV_TX_OK) {
6492cdf3 874 nes_debug(NES_DBG_CM, "Error sending packet %p "
615eb715 875 "(jiffies = %lu)\n", new_send, jiffies);
3c2d774c 876 new_send->timetosend = jiffies;
5962c2c8 877 ret = NETDEV_TX_OK;
3c2d774c
GS		 878 } else {
879 cm_packets_sent++;
880 if (!send_retrans) {
6492cdf3 881 cleanup_retrans_entry(cm_node);
3c2d774c 882 if (close_when_complete)
6492cdf3 883 rem_ref_cm_node(cm_core, cm_node);
3c2d774c
GS		 884 return ret;
885 }
3c2d774c 886 }
3c2d774c 887 }
3c2d774c 888
00ad255d
TN		 889 if (!timer_pending(&cm_core->tcp_timer))
890 mod_timer(&cm_core->tcp_timer, new_send->timetosend);
3c2d774c
GS		 891
892 return ret;
893}
894
9d5ab133
FL		 895static void nes_retrans_expired(struct nes_cm_node *cm_node)
896{
68237a0f 897 struct iw_cm_id *cm_id = cm_node->cm_id;
dae58728
FL		 898 enum nes_cm_node_state state = cm_node->state;
899 cm_node->state = NES_CM_STATE_CLOSED;
615eb715 900
dae58728 901 switch (state) {
9d5ab133
FL		 902 case NES_CM_STATE_SYN_RCVD:
903 case NES_CM_STATE_CLOSING:
904 rem_ref_cm_node(cm_node->cm_core, cm_node);
905 break;
906 case NES_CM_STATE_LAST_ACK:
907 case NES_CM_STATE_FIN_WAIT1:
68237a0f
FL		 908 if (cm_node->cm_id)
909 cm_id->rem_ref(cm_id);
9d5ab133
FL		 910 send_reset(cm_node, NULL);
911 break;
912 default:
69524e1a
FL		 913 add_ref_cm_node(cm_node);
914 send_reset(cm_node, NULL);
9d5ab133
FL		 915 create_event(cm_node, NES_CM_EVENT_ABORTED);
916 }
917}
918
919static void handle_recv_entry(struct nes_cm_node *cm_node, u32 rem_node)
920{
921 struct nes_timer_entry *recv_entry = cm_node->recv_entry;
922 struct iw_cm_id *cm_id = cm_node->cm_id;
923 struct nes_qp *nesqp;
924 unsigned long qplockflags;
925
926 if (!recv_entry)
927 return;
928 nesqp = (struct nes_qp *)recv_entry->skb;
929 if (nesqp) {
930 spin_lock_irqsave(&nesqp->lock, qplockflags);
931 if (nesqp->cm_id) {
932 nes_debug(NES_DBG_CM, "QP%u: cm_id = %p, "
615eb715
TN		 933 "refcount = %d: HIT A "
934 "NES_TIMER_TYPE_CLOSE with something "
935 "to do!!!\n", nesqp->hwqp.qp_id, cm_id,
936 atomic_read(&nesqp->refcount));
9d5ab133
FL		 937 nesqp->hw_tcp_state = NES_AEQE_TCP_STATE_CLOSED;
938 nesqp->last_aeq = NES_AEQE_AEID_RESET_SENT;
939 nesqp->ibqp_state = IB_QPS_ERR;
940 spin_unlock_irqrestore(&nesqp->lock, qplockflags);
941 nes_cm_disconn(nesqp);
942 } else {
943 spin_unlock_irqrestore(&nesqp->lock, qplockflags);
944 nes_debug(NES_DBG_CM, "QP%u: cm_id = %p, "
615eb715
TN		 945 "refcount = %d: HIT A "
946 "NES_TIMER_TYPE_CLOSE with nothing "
947 "to do!!!\n", nesqp->hwqp.qp_id, cm_id,
948 atomic_read(&nesqp->refcount));
9d5ab133
FL		 949 }
950 } else if (rem_node) {
951 /* TIME_WAIT state */
952 rem_ref_cm_node(cm_node->cm_core, cm_node);
953 }
954 if (cm_node->cm_id)
955 cm_id->rem_ref(cm_id);
956 kfree(recv_entry);
957 cm_node->recv_entry = NULL;
958}
3c2d774c
GS		 959
960/**
961 * nes_cm_timer_tick
962 */
1a855fbf 963static void nes_cm_timer_tick(unsigned long pass)
3c2d774c 964{
9d5ab133 965 unsigned long flags;
3c2d774c 966 unsigned long nexttimeout = jiffies + NES_LONG_TIME;
3c2d774c
GS		 967 struct nes_cm_node *cm_node;
968 struct nes_timer_entry *send_entry, *recv_entry;
9d5ab133
FL		 969 struct list_head *list_core_temp;
970 struct list_head *list_node;
3c2d774c 971 struct nes_cm_core *cm_core = g_cm_core;
3c2d774c 972 u32 settimer = 0;
4e9c3900 973 unsigned long timetosend;
3c2d774c 974 int ret = NETDEV_TX_OK;
3c2d774c 975
879e5bd5 976 struct list_head timer_list;
615eb715 977
879e5bd5 978 INIT_LIST_HEAD(&timer_list);
3c2d774c
GS		 979 spin_lock_irqsave(&cm_core->ht_lock, flags);
980
6492cdf3 981 list_for_each_safe(list_node, list_core_temp,
615eb715 982 &cm_core->connected_nodes) {
3c2d774c 983 cm_node = container_of(list_node, struct nes_cm_node, list);
9d5ab133 984 if ((cm_node->recv_entry) || (cm_node->send_entry)) {
879e5bd5
FL		 985 add_ref_cm_node(cm_node);
986 list_add(&cm_node->timer_entry, &timer_list);
987 }
988 }
989 spin_unlock_irqrestore(&cm_core->ht_lock, flags);
990
991 list_for_each_safe(list_node, list_core_temp, &timer_list) {
992 cm_node = container_of(list_node, struct nes_cm_node,
615eb715 993 timer_entry);
9d5ab133
FL		 994 recv_entry = cm_node->recv_entry;
995
996 if (recv_entry) {
6492cdf3
FL		 997 if (time_after(recv_entry->timetosend, jiffies)) {
998 if (nexttimeout > recv_entry->timetosend ||
615eb715 999 !settimer) {
3c2d774c
GS		 1000 nexttimeout = recv_entry->timetosend;
1001 settimer = 1;
1002 }
615eb715 1003 } else {
9d5ab133 1004 handle_recv_entry(cm_node, 1);
615eb715 1005 }
3c2d774c 1006 }
3c2d774c
GS		 1007
1008 spin_lock_irqsave(&cm_node->retrans_list_lock, flags);
6492cdf3
FL		 1009 do {
1010 send_entry = cm_node->send_entry;
1011 if (!send_entry)
c5d321e5 1012 break;
3c2d774c
GS		 1013 if (time_after(send_entry->timetosend, jiffies)) {
1014 if (cm_node->state != NES_CM_STATE_TSA) {
6492cdf3 1015 if ((nexttimeout >
615eb715
TN		 1016 send_entry->timetosend) ||
1017 !settimer) {
6492cdf3
FL		 1018 nexttimeout =
1019 send_entry->timetosend;
3c2d774c
GS		 1020 settimer = 1;
1021 }
3c2d774c 1022 } else {
6492cdf3 1023 free_retrans_entry(cm_node);
3c2d774c 1024 }
9d5ab133 1025 break;
3c2d774c 1026 }
6492cdf3
FL		 1027
1028 if ((cm_node->state == NES_CM_STATE_TSA) ||
615eb715 1029 (cm_node->state == NES_CM_STATE_CLOSED)) {
6492cdf3 1030 free_retrans_entry(cm_node);
c5d321e5 1031 break;
3c2d774c
GS		 1032 }
1033
6492cdf3 1034 if (!send_entry->retranscount ||
615eb715 1035 !send_entry->retrycount) {
3c2d774c 1036 cm_packets_dropped++;
6492cdf3 1037 free_retrans_entry(cm_node);
9d5ab133 1038
6492cdf3
FL		 1039 spin_unlock_irqrestore(
1040 &cm_node->retrans_list_lock, flags);
9d5ab133
FL		 1041 nes_retrans_expired(cm_node);
1042 cm_node->state = NES_CM_STATE_CLOSED;
6492cdf3 1043 spin_lock_irqsave(&cm_node->retrans_list_lock,
615eb715 1044 flags);
c5d321e5 1045 break;
3c2d774c 1046 }
3c2d774c
GS		 1047 atomic_inc(&send_entry->skb->users);
1048 cm_packets_retrans++;
6492cdf3 1049 nes_debug(NES_DBG_CM, "Retransmitting send_entry %p "
615eb715
TN		 1050 "for node %p, jiffies = %lu, time to send = "
1051 "%lu, retranscount = %u, send_entry->seq_num = "
1052 "0x%08X, cm_node->tcp_cntxt.rem_ack_num = "
1053 "0x%08X\n", send_entry, cm_node, jiffies,
1054 send_entry->timetosend,
1055 send_entry->retranscount,
1056 send_entry->seq_num,
1057 cm_node->tcp_cntxt.rem_ack_num);
6492cdf3
FL		 1058
1059 spin_unlock_irqrestore(&cm_node->retrans_list_lock,
615eb715 1060 flags);
3c2d774c 1061 ret = nes_nic_cm_xmit(send_entry->skb, cm_node->netdev);
6492cdf3 1062 spin_lock_irqsave(&cm_node->retrans_list_lock, flags);
3c2d774c 1063 if (ret != NETDEV_TX_OK) {
6492cdf3 1064 nes_debug(NES_DBG_CM, "rexmit failed for "
615eb715 1065 "node=%p\n", cm_node);
3c2d774c 1066 cm_packets_bounced++;
3c2d774c
GS		 1067 send_entry->retrycount--;
1068 nexttimeout = jiffies + NES_SHORT_TIME;
1069 settimer = 1;
c5d321e5 1070 break;
3c2d774c
GS		 1071 } else {
1072 cm_packets_sent++;
1073 }
6492cdf3 1074 nes_debug(NES_DBG_CM, "Packet Sent: retrans count = "
615eb715
TN		 1075 "%u, retry count = %u.\n",
1076 send_entry->retranscount,
1077 send_entry->retrycount);
3c2d774c
GS		 1078 if (send_entry->send_retrans) {
1079 send_entry->retranscount--;
4e9c3900 1080 timetosend = (NES_RETRY_TIMEOUT <<
615eb715 1081 (NES_DEFAULT_RETRANS - send_entry->retranscount));
4e9c3900 1082
6492cdf3 1083 send_entry->timetosend = jiffies +
615eb715 1084 min(timetosend, NES_MAX_TIMEOUT);
6492cdf3 1085 if (nexttimeout > send_entry->timetosend ||
615eb715 1086 !settimer) {
3c2d774c
GS		 1087 nexttimeout = send_entry->timetosend;
1088 settimer = 1;
1089 }
3c2d774c
GS		 1090 } else {
1091 int close_when_complete;
6492cdf3
FL		 1092 close_when_complete =
1093 send_entry->close_when_complete;
1094 nes_debug(NES_DBG_CM, "cm_node=%p state=%d\n",
615eb715 1095 cm_node, cm_node->state);
6492cdf3
FL		 1096 free_retrans_entry(cm_node);
1097 if (close_when_complete)
1098 rem_ref_cm_node(cm_node->cm_core,
615eb715 1099 cm_node);
3c2d774c 1100 }
6492cdf3 1101 } while (0);
3c2d774c 1102
6492cdf3
FL		 1103 spin_unlock_irqrestore(&cm_node->retrans_list_lock, flags);
1104 rem_ref_cm_node(cm_node->cm_core, cm_node);
3c2d774c 1105 }
3c2d774c
GS		 1106
1107 if (settimer) {
00ad255d
TN		 1108 if (!timer_pending(&cm_core->tcp_timer))
1109 mod_timer(&cm_core->tcp_timer, nexttimeout);
3c2d774c
GS		 1110 }
1111}
1112
1113
1114/**
1115 * send_syn
1116 */
6492cdf3 1117static int send_syn(struct nes_cm_node *cm_node, u32 sendack,
615eb715 1118 struct sk_buff *skb)
3c2d774c
GS		 1119{
1120 int ret;
1121 int flags = SET_SYN;
3c2d774c 1122 char optionsbuffer[sizeof(struct option_mss) +
615eb715
TN		 1123 sizeof(struct option_windowscale) + sizeof(struct option_base) +
1124 TCP_OPTIONS_PADDING];
3c2d774c
GS		 1125
1126 int optionssize = 0;
1127 /* Sending MSS option */
1128 union all_known_options *options;
1129
1130 if (!cm_node)
1131 return -EINVAL;
1132
1133 options = (union all_known_options *)&optionsbuffer[optionssize];
1134 options->as_mss.optionnum = OPTION_NUMBER_MSS;
1135 options->as_mss.length = sizeof(struct option_mss);
1136 options->as_mss.mss = htons(cm_node->tcp_cntxt.mss);
1137 optionssize += sizeof(struct option_mss);
1138
1139 options = (union all_known_options *)&optionsbuffer[optionssize];
1140 options->as_windowscale.optionnum = OPTION_NUMBER_WINDOW_SCALE;
1141 options->as_windowscale.length = sizeof(struct option_windowscale);
1142 options->as_windowscale.shiftcount = cm_node->tcp_cntxt.rcv_wscale;
1143 optionssize += sizeof(struct option_windowscale);
1144
6492cdf3 1145 if (sendack && !(NES_DRV_OPT_SUPRESS_OPTION_BC & nes_drv_opt)) {
3c2d774c
GS		 1146 options = (union all_known_options *)&optionsbuffer[optionssize];
1147 options->as_base.optionnum = OPTION_NUMBER_WRITE0;
1148 options->as_base.length = sizeof(struct option_base);
1149 optionssize += sizeof(struct option_base);
1150 /* we need the size to be a multiple of 4 */
1151 options = (union all_known_options *)&optionsbuffer[optionssize];
1152 options->as_end = 1;
1153 optionssize += 1;
1154 options = (union all_known_options *)&optionsbuffer[optionssize];
1155 options->as_end = 1;
1156 optionssize += 1;
1157 }
1158
1159 options = (union all_known_options *)&optionsbuffer[optionssize];
1160 options->as_end = OPTION_NUMBER_END;
1161 optionssize += 1;
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");
1167 return -1;
1168 }
1169
1170 if (sendack)
1171 flags |= SET_ACK;
1172
1173 form_cm_frame(skb, cm_node, optionsbuffer, optionssize, NULL, 0, flags);
1174 ret = schedule_nes_timer(cm_node, skb, NES_TIMER_TYPE_SEND, 1, 0);
1175
1176 return ret;
1177}
1178
1179
1180/**
1181 * send_reset
1182 */
6492cdf3 1183static int send_reset(struct nes_cm_node *cm_node, struct sk_buff *skb)
3c2d774c
GS		 1184{
1185 int ret;
3c2d774c
GS		 1186 int flags = SET_RST | SET_ACK;
1187
6492cdf3 1188 if (!skb)
e189062a 1189 skb = dev_alloc_skb(MAX_CM_BUFFER);
3c2d774c
GS		 1190 if (!skb) {
1191 nes_debug(NES_DBG_CM, "Failed to get a Free pkt\n");
9d5ab133 1192 return -ENOMEM;
3c2d774c
GS		 1193 }
1194
3c2d774c
GS		 1195 form_cm_frame(skb, cm_node, NULL, 0, NULL, 0, flags);
1196 ret = schedule_nes_timer(cm_node, skb, NES_TIMER_TYPE_SEND, 0, 1);
1197
1198 return ret;
1199}
1200
1201
1202/**
1203 * send_ack
1204 */
6492cdf3 1205static int send_ack(struct nes_cm_node *cm_node, struct sk_buff *skb)
3c2d774c
GS		 1206{
1207 int ret;
6492cdf3
FL		 1208
1209 if (!skb)
e189062a 1210 skb = dev_alloc_skb(MAX_CM_BUFFER);
3c2d774c
GS		 1211
1212 if (!skb) {
1213 nes_debug(NES_DBG_CM, "Failed to get a Free pkt\n");
1214 return -1;
1215 }
1216
1217 form_cm_frame(skb, cm_node, NULL, 0, NULL, 0, SET_ACK);
1218 ret = schedule_nes_timer(cm_node, skb, NES_TIMER_TYPE_SEND, 0, 0);
1219
1220 return ret;
1221}
1222
1223
1224/**
1225 * send_fin
1226 */
1a855fbf 1227static int send_fin(struct nes_cm_node *cm_node, struct sk_buff *skb)
3c2d774c
GS		 1228{
1229 int ret;
1230
1231 /* if we didn't get a frame get one */
1232 if (!skb)
e189062a 1233 skb = dev_alloc_skb(MAX_CM_BUFFER);
3c2d774c
GS		 1234
1235 if (!skb) {
1236 nes_debug(NES_DBG_CM, "Failed to get a Free pkt\n");
1237 return -1;
1238 }
1239
1240 form_cm_frame(skb, cm_node, NULL, 0, NULL, 0, SET_ACK | SET_FIN);
1241 ret = schedule_nes_timer(cm_node, skb, NES_TIMER_TYPE_SEND, 1, 0);
1242
1243 return ret;
1244}
1245
1246
3c2d774c
GS		 1247/**
1248 * find_node - find a cm node that matches the reference cm node
1249 */
1250static struct nes_cm_node *find_node(struct nes_cm_core *cm_core,
615eb715 1251 u16 rem_port, nes_addr_t rem_addr, u16 loc_port, nes_addr_t loc_addr)
3c2d774c
GS		 1252{
1253 unsigned long flags;
3c2d774c
GS		 1254 struct list_head *hte;
1255 struct nes_cm_node *cm_node;
1256
3c2d774c
GS		 1257 /* get a handle on the hte */
1258 hte = &cm_core->connected_nodes;
1259
3c2d774c
GS		 1260 /* walk list and find cm_node associated with this session ID */
1261 spin_lock_irqsave(&cm_core->ht_lock, flags);
4e96a774 1262 list_for_each_entry(cm_node, hte, list) {
3c2d774c
GS		 1263 /* compare quad, return node handle if a match */
1264 nes_debug(NES_DBG_CM, "finding node %x:%x =? %x:%x ^ %x:%x =? %x:%x\n",
615eb715
TN		 1265 cm_node->loc_addr, cm_node->loc_port,
1266 loc_addr, loc_port,
1267 cm_node->rem_addr, cm_node->rem_port,
1268 rem_addr, rem_port);
5647263c
TN		 1269 if ((cm_node->mapped_loc_addr == loc_addr) &&
1270 (cm_node->mapped_loc_port == loc_port) &&
1271 (cm_node->mapped_rem_addr == rem_addr) &&
1272 (cm_node->mapped_rem_port == rem_port)) {
1273
3c2d774c
GS		 1274 add_ref_cm_node(cm_node);
1275 spin_unlock_irqrestore(&cm_core->ht_lock, flags);
1276 return cm_node;
1277 }
1278 }
1279 spin_unlock_irqrestore(&cm_core->ht_lock, flags);
1280
1281 /* no owner node */
1282 return NULL;
1283}
1284
1285
1286/**
1287 * find_listener - find a cm node listening on this addr-port pair
1288 */
1289static struct nes_cm_listener *find_listener(struct nes_cm_core *cm_core,
5647263c
TN		 1290 nes_addr_t dst_addr, u16 dst_port,
1291 enum nes_cm_listener_state listener_state, int local)
3c2d774c
GS		 1292{
1293 unsigned long flags;
3c2d774c 1294 struct nes_cm_listener *listen_node;
5647263c
TN		 1295 nes_addr_t listen_addr;
1296 u16 listen_port;
3c2d774c
GS		 1297
1298 /* walk list and find cm_node associated with this session ID */
1299 spin_lock_irqsave(&cm_core->listen_list_lock, flags);
4e96a774 1300 list_for_each_entry(listen_node, &cm_core->listen_list.list, list) {
5647263c
TN		 1301 if (local) {
1302 listen_addr = listen_node->loc_addr;
1303 listen_port = listen_node->loc_port;
1304 } else {
1305 listen_addr = listen_node->mapped_loc_addr;
1306 listen_port = listen_node->mapped_loc_port;
1307 }
3c2d774c 1308 /* compare node pair, return node handle if a match */
5647263c
TN		 1309 if (((listen_addr == dst_addr) ||
1310 listen_addr == 0x00000000) &&
1311 (listen_port == dst_port) &&
615eb715 1312 (listener_state & listen_node->listener_state)) {
3c2d774c
GS		 1313 atomic_inc(&listen_node->ref_count);
1314 spin_unlock_irqrestore(&cm_core->listen_list_lock, flags);
1315 return listen_node;
1316 }
1317 }
1318 spin_unlock_irqrestore(&cm_core->listen_list_lock, flags);
1319
3c2d774c
GS		 1320 /* no listener */
1321 return NULL;
1322}
1323
3c2d774c
GS		 1324/**
1325 * add_hte_node - add a cm node to the hash table
1326 */
1327static int add_hte_node(struct nes_cm_core *cm_core, struct nes_cm_node *cm_node)
1328{
1329 unsigned long flags;
3c2d774c
GS		 1330 struct list_head *hte;
1331
1332 if (!cm_node || !cm_core)
1333 return -EINVAL;
1334
6492cdf3 1335 nes_debug(NES_DBG_CM, "Adding Node %p to Active Connection HT\n",
615eb715 1336 cm_node);
3c2d774c 1337
3c2d774c
GS		 1338 spin_lock_irqsave(&cm_core->ht_lock, flags);
1339
1340 /* get a handle on the hash table element (list head for this slot) */
1341 hte = &cm_core->connected_nodes;
1342 list_add_tail(&cm_node->list, hte);
1343 atomic_inc(&cm_core->ht_node_cnt);
1344
1345 spin_unlock_irqrestore(&cm_core->ht_lock, flags);
1346
1347 return 0;
1348}
1349
1350
1351/**
1352 * mini_cm_dec_refcnt_listen
1353 */
1354static int mini_cm_dec_refcnt_listen(struct nes_cm_core *cm_core,
615eb715 1355 struct nes_cm_listener *listener, int free_hanging_nodes)
3c2d774c 1356{
9d5ab133
FL		 1357 int ret = -EINVAL;
1358 int err = 0;
3c2d774c 1359 unsigned long flags;
6492cdf3
FL		 1360 struct list_head *list_pos = NULL;
1361 struct list_head *list_temp = NULL;
1362 struct nes_cm_node *cm_node = NULL;
879e5bd5 1363 struct list_head reset_list;
6492cdf3
FL		 1364
1365 nes_debug(NES_DBG_CM, "attempting listener= %p free_nodes= %d, "
615eb715
TN		 1366 "refcnt=%d\n", listener, free_hanging_nodes,
1367 atomic_read(&listener->ref_count));
6492cdf3 1368 /* free non-accelerated child nodes for this listener */
879e5bd5 1369 INIT_LIST_HEAD(&reset_list);
6492cdf3
FL		 1370 if (free_hanging_nodes) {
1371 spin_lock_irqsave(&cm_core->ht_lock, flags);
1372 list_for_each_safe(list_pos, list_temp,
879e5bd5 1373 &g_cm_core->connected_nodes) {
6492cdf3 1374 cm_node = container_of(list_pos, struct nes_cm_node,
615eb715 1375 list);
6492cdf3 1376 if ((cm_node->listener == listener) &&
879e5bd5
FL		 1377 (!cm_node->accelerated)) {
1378 add_ref_cm_node(cm_node);
1379 list_add(&cm_node->reset_entry, &reset_list);
6492cdf3
FL		 1380 }
1381 }
1382 spin_unlock_irqrestore(&cm_core->ht_lock, flags);
1383 }
879e5bd5
FL		 1384
1385 list_for_each_safe(list_pos, list_temp, &reset_list) {
1386 cm_node = container_of(list_pos, struct nes_cm_node,
615eb715 1387 reset_entry);
9d5ab133
FL		 1388 {
1389 struct nes_cm_node *loopback = cm_node->loopbackpartner;
c5a7d489 1390 enum nes_cm_node_state old_state;
9d5ab133
FL		 1391 if (NES_CM_STATE_FIN_WAIT1 <= cm_node->state) {
1392 rem_ref_cm_node(cm_node->cm_core, cm_node);
1393 } else {
1394 if (!loopback) {
1395 cleanup_retrans_entry(cm_node);
1396 err = send_reset(cm_node, NULL);
1397 if (err) {
1398 cm_node->state =
615eb715 1399 NES_CM_STATE_CLOSED;
9d5ab133
FL		 1400 WARN_ON(1);
1401 } else {
c5a7d489
FL		 1402 old_state = cm_node->state;
1403 cm_node->state = NES_CM_STATE_LISTENER_DESTROYED;
1404 if (old_state != NES_CM_STATE_MPAREQ_RCVD)
1405 rem_ref_cm_node(
1406 cm_node->cm_core,
1407 cm_node);
9d5ab133
FL		 1408 }
1409 } else {
1410 struct nes_cm_event event;
1411
1412 event.cm_node = loopback;
1413 event.cm_info.rem_addr =
1414 loopback->rem_addr;
1415 event.cm_info.loc_addr =
1416 loopback->loc_addr;
1417 event.cm_info.rem_port =
1418 loopback->rem_port;
1419 event.cm_info.loc_port =
1420 loopback->loc_port;
1421 event.cm_info.cm_id = loopback->cm_id;
43093b94
FL		 1422 add_ref_cm_node(loopback);
1423 loopback->state = NES_CM_STATE_CLOSED;
9d5ab133 1424 cm_event_connect_error(&event);
c5a7d489 1425 cm_node->state = NES_CM_STATE_LISTENER_DESTROYED;
9d5ab133 1426
9d5ab133
FL		 1427 rem_ref_cm_node(cm_node->cm_core,
1428 cm_node);
1429
1430 }
1431 }
1432 }
879e5bd5
FL		 1433 }
1434
3c2d774c
GS		 1435 spin_lock_irqsave(&cm_core->listen_list_lock, flags);
1436 if (!atomic_dec_return(&listener->ref_count)) {
1437 list_del(&listener->list);
1438
1439 /* decrement our listen node count */
1440 atomic_dec(&cm_core->listen_node_cnt);
1441
1442 spin_unlock_irqrestore(&cm_core->listen_list_lock, flags);
1443
5647263c
TN		 1444 if (listener->nesvnic) {
1445 nes_manage_apbvt(listener->nesvnic,
1446 listener->mapped_loc_port,
1447 PCI_FUNC(listener->nesvnic->nesdev->pcidev->devfn),
1448 NES_MANAGE_APBVT_DEL);
1449
1450 nes_remove_mapinfo(listener->loc_addr,
1451 listener->loc_port,
1452 listener->mapped_loc_addr,
1453 listener->mapped_loc_port);
1454 nes_debug(NES_DBG_NLMSG,
1455 "Delete APBVT mapped_loc_port = %04X\n",
1456 listener->mapped_loc_port);
1457 }
3c2d774c
GS		 1458
1459 nes_debug(NES_DBG_CM, "destroying listener (%p)\n", listener);
1460
1461 kfree(listener);
a2e9c384 1462 listener = NULL;
3c2d774c 1463 ret = 0;
6e10d2e4 1464 atomic_inc(&cm_listens_destroyed);
3c2d774c
GS		 1465 } else {
1466 spin_unlock_irqrestore(&cm_core->listen_list_lock, flags);
1467 }
1468 if (listener) {
1469 if (atomic_read(&listener->pend_accepts_cnt) > 0)
1470 nes_debug(NES_DBG_CM, "destroying listener (%p)"
615eb715
TN		 1471 " with non-zero pending accepts=%u\n",
1472 listener, atomic_read(&listener->pend_accepts_cnt));
3c2d774c
GS		 1473 }
1474
1475 return ret;
1476}
1477
1478
1479/**
1480 * mini_cm_del_listen
1481 */
1482static int mini_cm_del_listen(struct nes_cm_core *cm_core,
615eb715 1483 struct nes_cm_listener *listener)
3c2d774c
GS		 1484{
1485 listener->listener_state = NES_CM_LISTENER_PASSIVE_STATE;
1486 listener->cm_id = NULL; /* going to be destroyed pretty soon */
1487 return mini_cm_dec_refcnt_listen(cm_core, listener, 1);
1488}
1489
1490
1491/**
1492 * mini_cm_accelerated
1493 */
1494static inline int mini_cm_accelerated(struct nes_cm_core *cm_core,
615eb715 1495 struct nes_cm_node *cm_node)
3c2d774c 1496{
3c2d774c
GS		 1497 cm_node->accelerated = 1;
1498
1499 if (cm_node->accept_pend) {
1500 BUG_ON(!cm_node->listener);
1501 atomic_dec(&cm_node->listener->pend_accepts_cnt);
9d5ab133 1502 cm_node->accept_pend = 0;
3c2d774c
GS		 1503 BUG_ON(atomic_read(&cm_node->listener->pend_accepts_cnt) < 0);
1504 }
1505
00ad255d
TN		 1506 if (!timer_pending(&cm_core->tcp_timer))
1507 mod_timer(&cm_core->tcp_timer, (jiffies + NES_SHORT_TIME));
3c2d774c
GS		 1508
1509 return 0;
1510}
1511
1512
1513/**
7191a0a1 1514 * nes_addr_resolve_neigh
3c2d774c 1515 */
7a576dfd 1516static int nes_addr_resolve_neigh(struct nes_vnic *nesvnic, u32 dst_ip, int arpindex)
3c2d774c
GS		 1517{
1518 struct rtable *rt;
7191a0a1 1519 struct neighbour *neigh;
7a576dfd 1520 int rc = arpindex;
2a4c97ea 1521 struct net_device *netdev;
7a576dfd 1522 struct nes_adapter *nesadapter = nesvnic->nesdev->nesadapter;
165d6822 1523 __be32 dst_ipaddr = htonl(dst_ip);
3c2d774c 1524
165d6822 1525 rt = ip_route_output(&init_net, dst_ipaddr, nesvnic->local_ipaddr, 0, 0);
b23dd4fe 1526 if (IS_ERR(rt)) {
9d5ab133 1527 printk(KERN_ERR "%s: ip_route_output_key failed for 0x%08X\n",
615eb715 1528 __func__, dst_ip);
7191a0a1 1529 return rc;
3c2d774c
GS		 1530 }
1531
cf55bb24 1532 if (netif_is_bond_slave(nesvnic->netdev))
7f6e7101 1533 netdev = netdev_master_upper_dev_get(nesvnic->netdev);
2a4c97ea
MS		 1534 else
1535 netdev = nesvnic->netdev;
1536
165d6822 1537 neigh = dst_neigh_lookup(&rt->dst, &dst_ipaddr);
e55684fa 1538
40e2bb58 1539 rcu_read_lock();
7191a0a1
BS		 1540 if (neigh) {
1541 if (neigh->nud_state & NUD_VALID) {
1542 nes_debug(NES_DBG_CM, "Neighbor MAC address for 0x%08X"
e174961c
JB		 1543 " is %pM, Gateway is 0x%08X \n", dst_ip,
1544 neigh->ha, ntohl(rt->rt_gateway));
7a576dfd
FL		 1545
1546 if (arpindex >= 0) {
79adc532 1547 if (ether_addr_equal(nesadapter->arp_table[arpindex].mac_addr, neigh->ha)) {
7a576dfd 1548 /* Mac address same as in nes_arp_table */
e55684fa 1549 goto out;
7a576dfd
FL		 1550 }
1551
1552 nes_manage_arp_cache(nesvnic->netdev,
615eb715
TN		 1553 nesadapter->arp_table[arpindex].mac_addr,
1554 dst_ip, NES_ARP_DELETE);
7a576dfd
FL		 1555 }
1556
7191a0a1
BS		 1557 nes_manage_arp_cache(nesvnic->netdev, neigh->ha,
1558 dst_ip, NES_ARP_ADD);
1559 rc = nes_arp_table(nesvnic->nesdev, dst_ip, NULL,
1560 NES_ARP_RESOLVE);
40e2bb58
DM		 1561 } else {
1562 neigh_event_send(neigh, NULL);
7191a0a1 1563 }
580da35a 1564 }
e55684fa 1565out:
40e2bb58 1566 rcu_read_unlock();
e55684fa
DM		 1567
1568 if (neigh)
1569 neigh_release(neigh);
1570
3c2d774c 1571 ip_rt_put(rt);
7191a0a1 1572 return rc;
3c2d774c
GS		 1573}
1574
3c2d774c
GS		 1575/**
1576 * make_cm_node - create a new instance of a cm node
1577 */
1578static struct nes_cm_node *make_cm_node(struct nes_cm_core *cm_core,
615eb715
TN		 1579 struct nes_vnic *nesvnic, struct nes_cm_info *cm_info,
1580 struct nes_cm_listener *listener)
3c2d774c
GS		 1581{
1582 struct nes_cm_node *cm_node;
1583 struct timespec ts;
7a576dfd 1584 int oldarpindex = 0;
3c2d774c
GS		 1585 int arpindex = 0;
1586 struct nes_device *nesdev;
1587 struct nes_adapter *nesadapter;
1588
1589 /* create an hte and cm_node for this instance */
1590 cm_node = kzalloc(sizeof(*cm_node), GFP_ATOMIC);
1591 if (!cm_node)
1592 return NULL;
1593
1594 /* set our node specific transport info */
230da36a
TN		 1595 if (listener) {
1596 cm_node->loc_addr = listener->loc_addr;
1597 cm_node->loc_port = listener->loc_port;
1598 } else {
1599 cm_node->loc_addr = cm_info->loc_addr;
1600 cm_node->loc_port = cm_info->loc_port;
1601 }
3c2d774c 1602 cm_node->rem_addr = cm_info->rem_addr;
3c2d774c 1603 cm_node->rem_port = cm_info->rem_port;
615eb715 1604
5647263c
TN		 1605 cm_node->mapped_loc_addr = cm_info->mapped_loc_addr;
1606 cm_node->mapped_rem_addr = cm_info->mapped_rem_addr;
1607 cm_node->mapped_loc_port = cm_info->mapped_loc_port;
1608 cm_node->mapped_rem_port = cm_info->mapped_rem_port;
1609
615eb715
TN		 1610 cm_node->mpa_frame_rev = mpa_version;
1611 cm_node->send_rdma0_op = SEND_RDMA_READ_ZERO;
4ac79a70
TN		 1612 cm_node->mpav2_ird_ord = 0;
1613 cm_node->ird_size = 0;
1614 cm_node->ord_size = 0;
615eb715 1615
63779436
HH		 1616 nes_debug(NES_DBG_CM, "Make node addresses : loc = %pI4:%x, rem = %pI4:%x\n",
1617 &cm_node->loc_addr, cm_node->loc_port,
1618 &cm_node->rem_addr, cm_node->rem_port);
3c2d774c 1619 cm_node->listener = listener;
854ace98
FL		 1620 if (listener)
1621 cm_node->tos = listener->tos;
3c2d774c
GS		 1622 cm_node->netdev = nesvnic->netdev;
1623 cm_node->cm_id = cm_info->cm_id;
1624 memcpy(cm_node->loc_mac, nesvnic->netdev->dev_addr, ETH_ALEN);
1625
6492cdf3 1626 nes_debug(NES_DBG_CM, "listener=%p, cm_id=%p\n", cm_node->listener,
615eb715 1627 cm_node->cm_id);
3c2d774c 1628
3c2d774c 1629 spin_lock_init(&cm_node->retrans_list_lock);
3c2d774c
GS		 1630
1631 cm_node->loopbackpartner = NULL;
1632 atomic_set(&cm_node->ref_count, 1);
1633 /* associate our parent CM core */
1634 cm_node->cm_core = cm_core;
1635 cm_node->tcp_cntxt.loc_id = NES_CM_DEF_LOCAL_ID;
1636 cm_node->tcp_cntxt.rcv_wscale = NES_CM_DEFAULT_RCV_WND_SCALE;
1637 cm_node->tcp_cntxt.rcv_wnd = NES_CM_DEFAULT_RCV_WND_SCALED >>
615eb715 1638 NES_CM_DEFAULT_RCV_WND_SCALE;
3c2d774c
GS		 1639 ts = current_kernel_time();
1640 cm_node->tcp_cntxt.loc_seq_num = htonl(ts.tv_nsec);
1641 cm_node->tcp_cntxt.mss = nesvnic->max_frame_size - sizeof(struct iphdr) -
615eb715 1642 sizeof(struct tcphdr) - ETH_HLEN - VLAN_HLEN;
3c2d774c
GS		 1643 cm_node->tcp_cntxt.rcv_nxt = 0;
1644 /* get a unique session ID , add thread_id to an upcounter to handle race */
1645 atomic_inc(&cm_core->node_cnt);
3c2d774c
GS		 1646 cm_node->conn_type = cm_info->conn_type;
1647 cm_node->apbvt_set = 0;
1648 cm_node->accept_pend = 0;
1649
1650 cm_node->nesvnic = nesvnic;
1651 /* get some device handles, for arp lookup */
1652 nesdev = nesvnic->nesdev;
1653 nesadapter = nesdev->nesadapter;
1654
1655 cm_node->loopbackpartner = NULL;
7a576dfd 1656
3c2d774c 1657 /* get the mac addr for the remote node */
5647263c
TN		 1658 oldarpindex = nes_arp_table(nesdev, cm_node->mapped_rem_addr,
1659 NULL, NES_ARP_RESOLVE);
1660 arpindex = nes_addr_resolve_neigh(nesvnic,
1661 cm_node->mapped_rem_addr, oldarpindex);
3c2d774c 1662 if (arpindex < 0) {
7a576dfd
FL		 1663 kfree(cm_node);
1664 return NULL;
3c2d774c
GS		 1665 }
1666
1667 /* copy the mac addr to node context */
1668 memcpy(cm_node->rem_mac, nesadapter->arp_table[arpindex].mac_addr, ETH_ALEN);
e174961c
JB		 1669 nes_debug(NES_DBG_CM, "Remote mac addr from arp table: %pM\n",
1670 cm_node->rem_mac);
3c2d774c
GS		 1671
1672 add_hte_node(cm_core, cm_node);
1673 atomic_inc(&cm_nodes_created);
1674
1675 return cm_node;
1676}
1677
1678
1679/**
1680 * add_ref_cm_node - destroy an instance of a cm node
1681 */
1682static int add_ref_cm_node(struct nes_cm_node *cm_node)
1683{
1684 atomic_inc(&cm_node->ref_count);
1685 return 0;
1686}
1687
1688
1689/**
1690 * rem_ref_cm_node - destroy an instance of a cm node
1691 */
1692static int rem_ref_cm_node(struct nes_cm_core *cm_core,
615eb715 1693 struct nes_cm_node *cm_node)
3c2d774c 1694{
9d5ab133 1695 unsigned long flags;
3c2d774c
GS		 1696 struct nes_qp *nesqp;
1697
1698 if (!cm_node)
1699 return -EINVAL;
1700
1701 spin_lock_irqsave(&cm_node->cm_core->ht_lock, flags);
1702 if (atomic_dec_return(&cm_node->ref_count)) {
1703 spin_unlock_irqrestore(&cm_node->cm_core->ht_lock, flags);
1704 return 0;
1705 }
1706 list_del(&cm_node->list);
1707 atomic_dec(&cm_core->ht_node_cnt);
1708 spin_unlock_irqrestore(&cm_node->cm_core->ht_lock, flags);
1709
1710 /* if the node is destroyed before connection was accelerated */
1711 if (!cm_node->accelerated && cm_node->accept_pend) {
1712 BUG_ON(!cm_node->listener);
1713 atomic_dec(&cm_node->listener->pend_accepts_cnt);
1714 BUG_ON(atomic_read(&cm_node->listener->pend_accepts_cnt) < 0);
1715 }
9d5ab133
FL		 1716 WARN_ON(cm_node->send_entry);
1717 if (cm_node->recv_entry)
1718 handle_recv_entry(cm_node, 0);
3c2d774c
GS		 1719 if (cm_node->listener) {
1720 mini_cm_dec_refcnt_listen(cm_core, cm_node->listener, 0);
1721 } else {
1722 if (cm_node->apbvt_set && cm_node->nesvnic) {
5647263c
TN		 1723 nes_manage_apbvt(cm_node->nesvnic, cm_node->mapped_loc_port,
1724 PCI_FUNC(cm_node->nesvnic->nesdev->pcidev->devfn),
615eb715 1725 NES_MANAGE_APBVT_DEL);
3c2d774c 1726 }
5647263c
TN		 1727 nes_debug(NES_DBG_NLMSG, "Delete APBVT mapped_loc_port = %04X\n",
1728 cm_node->mapped_loc_port);
1729 nes_remove_mapinfo(cm_node->loc_addr, cm_node->loc_port,
1730 cm_node->mapped_loc_addr, cm_node->mapped_loc_port);
3c2d774c
GS		 1731 }
1732
3c2d774c
GS		 1733 atomic_dec(&cm_core->node_cnt);
1734 atomic_inc(&cm_nodes_destroyed);
6492cdf3
FL		 1735 nesqp = cm_node->nesqp;
1736 if (nesqp) {
1737 nesqp->cm_node = NULL;
1738 nes_rem_ref(&nesqp->ibqp);
1739 cm_node->nesqp = NULL;
1740 }
3c2d774c 1741
6492cdf3 1742 kfree(cm_node);
3c2d774c
GS		 1743 return 0;
1744}
1745
3c2d774c
GS		 1746/**
1747 * process_options
1748 */
6492cdf3 1749static int process_options(struct nes_cm_node *cm_node, u8 *optionsloc,
615eb715 1750 u32 optionsize, u32 syn_packet)
3c2d774c
GS		 1751{
1752 u32 tmp;
1753 u32 offset = 0;
1754 union all_known_options *all_options;
1755 char got_mss_option = 0;
1756
1757 while (offset < optionsize) {
1758 all_options = (union all_known_options *)(optionsloc + offset);
1759 switch (all_options->as_base.optionnum) {
6492cdf3
FL		 1760 case OPTION_NUMBER_END:
1761 offset = optionsize;
1762 break;
1763 case OPTION_NUMBER_NONE:
1764 offset += 1;
1765 continue;
1766 case OPTION_NUMBER_MSS:
1767 nes_debug(NES_DBG_CM, "%s: MSS Length: %d Offset: %d "
615eb715
TN		 1768 "Size: %d\n", __func__,
1769 all_options->as_mss.length, offset, optionsize);
6492cdf3
FL		 1770 got_mss_option = 1;
1771 if (all_options->as_mss.length != 4) {
1772 return 1;
1773 } else {
1774 tmp = ntohs(all_options->as_mss.mss);
1775 if (tmp > 0 && tmp <
615eb715 1776 cm_node->tcp_cntxt.mss)
6492cdf3
FL		 1777 cm_node->tcp_cntxt.mss = tmp;
1778 }
1779 break;
1780 case OPTION_NUMBER_WINDOW_SCALE:
1781 cm_node->tcp_cntxt.snd_wscale =
1782 all_options->as_windowscale.shiftcount;
1783 break;
6492cdf3
FL		 1784 default:
1785 nes_debug(NES_DBG_CM, "TCP Option not understood: %x\n",
615eb715 1786 all_options->as_base.optionnum);
6492cdf3 1787 break;
3c2d774c
GS		 1788 }
1789 offset += all_options->as_base.length;
1790 }
1791 if ((!got_mss_option) && (syn_packet))
1792 cm_node->tcp_cntxt.mss = NES_CM_DEFAULT_MSS;
1793 return 0;
1794}
1795
6492cdf3
FL		 1796static void drop_packet(struct sk_buff *skb)
1797{
1798 atomic_inc(&cm_accel_dropped_pkts);
1799 dev_kfree_skb_any(skb);
1800}
3c2d774c 1801
9d5ab133 1802static void handle_fin_pkt(struct nes_cm_node *cm_node)
3c2d774c 1803{
6492cdf3 1804 nes_debug(NES_DBG_CM, "Received FIN, cm_node = %p, state = %u. "
615eb715
TN		 1805 "refcnt=%d\n", cm_node, cm_node->state,
1806 atomic_read(&cm_node->ref_count));
6492cdf3
FL		 1807 switch (cm_node->state) {
1808 case NES_CM_STATE_SYN_RCVD:
1809 case NES_CM_STATE_SYN_SENT:
1810 case NES_CM_STATE_ESTABLISHED:
9d5ab133 1811 case NES_CM_STATE_MPAREJ_RCVD:
109d67e4
FL		 1812 cm_node->tcp_cntxt.rcv_nxt++;
1813 cleanup_retrans_entry(cm_node);
6492cdf3 1814 cm_node->state = NES_CM_STATE_LAST_ACK;
9d5ab133 1815 send_fin(cm_node, NULL);
6492cdf3 1816 break;
b1190d3e
FL		 1817 case NES_CM_STATE_MPAREQ_SENT:
1818 create_event(cm_node, NES_CM_EVENT_ABORTED);
1819 cm_node->tcp_cntxt.rcv_nxt++;
1820 cleanup_retrans_entry(cm_node);
1821 cm_node->state = NES_CM_STATE_CLOSED;
1822 add_ref_cm_node(cm_node);
1823 send_reset(cm_node, NULL);
1824 break;
6492cdf3 1825 case NES_CM_STATE_FIN_WAIT1:
109d67e4
FL		 1826 cm_node->tcp_cntxt.rcv_nxt++;
1827 cleanup_retrans_entry(cm_node);
6492cdf3 1828 cm_node->state = NES_CM_STATE_CLOSING;
9d5ab133 1829 send_ack(cm_node, NULL);
25985edc 1830 /* Wait for ACK as this is simultaneous close..
9d5ab133
FL		 1831 * After we receive ACK, do not send anything..
1832 * Just rm the node.. Done.. */
6492cdf3
FL		 1833 break;
1834 case NES_CM_STATE_FIN_WAIT2:
109d67e4
FL		 1835 cm_node->tcp_cntxt.rcv_nxt++;
1836 cleanup_retrans_entry(cm_node);
6492cdf3 1837 cm_node->state = NES_CM_STATE_TIME_WAIT;
9d5ab133
FL		 1838 send_ack(cm_node, NULL);
1839 schedule_nes_timer(cm_node, NULL, NES_TIMER_TYPE_CLOSE, 1, 0);
1840 break;
1841 case NES_CM_STATE_TIME_WAIT:
109d67e4
FL		 1842 cm_node->tcp_cntxt.rcv_nxt++;
1843 cleanup_retrans_entry(cm_node);
6492cdf3 1844 cm_node->state = NES_CM_STATE_CLOSED;
9d5ab133 1845 rem_ref_cm_node(cm_node->cm_core, cm_node);
6492cdf3
FL		 1846 break;
1847 case NES_CM_STATE_TSA:
1848 default:
1849 nes_debug(NES_DBG_CM, "Error Rcvd FIN for node-%p state = %d\n",
1850 cm_node, cm_node->state);
6492cdf3 1851 break;
3c2d774c 1852 }
6492cdf3 1853}
3c2d774c 1854
3c2d774c 1855
6492cdf3
FL		 1856static void handle_rst_pkt(struct nes_cm_node *cm_node, struct sk_buff *skb,
1857 struct tcphdr *tcph)
1858{
3c2d774c 1859
6492cdf3
FL		 1860 int reset = 0; /* whether to send reset in case of err.. */
1861 atomic_inc(&cm_resets_recvd);
1862 nes_debug(NES_DBG_CM, "Received Reset, cm_node = %p, state = %u."
1863 " refcnt=%d\n", cm_node, cm_node->state,
1864 atomic_read(&cm_node->ref_count));
1865 cleanup_retrans_entry(cm_node);
1866 switch (cm_node->state) {
1867 case NES_CM_STATE_SYN_SENT:
1868 case NES_CM_STATE_MPAREQ_SENT:
1869 nes_debug(NES_DBG_CM, "%s[%u] create abort for cm_node=%p "
1870 "listener=%p state=%d\n", __func__, __LINE__, cm_node,
1871 cm_node->listener, cm_node->state);
615eb715
TN		 1872 switch (cm_node->mpa_frame_rev) {
1873 case IETF_MPA_V2:
1874 cm_node->mpa_frame_rev = IETF_MPA_V1;
1875 /* send a syn and goto syn sent state */
1876 cm_node->state = NES_CM_STATE_SYN_SENT;
1877 if (send_syn(cm_node, 0, NULL)) {
1878 active_open_err(cm_node, skb, reset);
1879 }
1880 break;
1881 case IETF_MPA_V1:
1882 default:
1883 active_open_err(cm_node, skb, reset);
1884 break;
1885 }
6492cdf3 1886 break;
183ecfa3 1887 case NES_CM_STATE_MPAREQ_RCVD:
4d8d6389 1888 atomic_inc(&cm_node->passive_state);
183ecfa3
FL		 1889 dev_kfree_skb_any(skb);
1890 break;
6492cdf3
FL		 1891 case NES_CM_STATE_ESTABLISHED:
1892 case NES_CM_STATE_SYN_RCVD:
1893 case NES_CM_STATE_LISTENING:
1894 nes_debug(NES_DBG_CM, "Bad state %s[%u]\n", __func__, __LINE__);
1895 passive_open_err(cm_node, skb, reset);
1896 break;
1897 case NES_CM_STATE_TSA:
183ecfa3
FL		 1898 active_open_err(cm_node, skb, reset);
1899 break;
1900 case NES_CM_STATE_CLOSED:
183ecfa3
FL		 1901 drop_packet(skb);
1902 break;
dae58728 1903 case NES_CM_STATE_FIN_WAIT2:
68237a0f 1904 case NES_CM_STATE_FIN_WAIT1:
109d67e4
FL		 1905 case NES_CM_STATE_LAST_ACK:
1906 cm_node->cm_id->rem_ref(cm_node->cm_id);
9d5ab133 1907 case NES_CM_STATE_TIME_WAIT:
9d5ab133
FL		 1908 cm_node->state = NES_CM_STATE_CLOSED;
1909 rem_ref_cm_node(cm_node->cm_core, cm_node);
1910 drop_packet(skb);
1911 break;
6492cdf3 1912 default:
183ecfa3 1913 drop_packet(skb);
6492cdf3
FL		 1914 break;
1915 }
1916}
3c2d774c 1917
9d5ab133
FL		 1918
1919static void handle_rcv_mpa(struct nes_cm_node *cm_node, struct sk_buff *skb)
6492cdf3 1920{
615eb715 1921 int ret = 0;
6492cdf3
FL		 1922 int datasize = skb->len;
1923 u8 *dataloc = skb->data;
9d5ab133
FL		 1924
1925 enum nes_cm_event_type type = NES_CM_EVENT_UNKNOWN;
615eb715
TN		 1926 u32 res_type;
1927
9d5ab133
FL		 1928 ret = parse_mpa(cm_node, dataloc, &res_type, datasize);
1929 if (ret) {
6492cdf3 1930 nes_debug(NES_DBG_CM, "didn't like MPA Request\n");
9d5ab133 1931 if (cm_node->state == NES_CM_STATE_MPAREQ_SENT) {
6492cdf3 1932 nes_debug(NES_DBG_CM, "%s[%u] create abort for "
615eb715
TN		 1933 "cm_node=%p listener=%p state=%d\n", __func__,
1934 __LINE__, cm_node, cm_node->listener,
1935 cm_node->state);
6492cdf3
FL		 1936 active_open_err(cm_node, skb, 1);
1937 } else {
1938 passive_open_err(cm_node, skb, 1);
3c2d774c 1939 }
9d5ab133
FL		 1940 return;
1941 }
1942
1943 switch (cm_node->state) {
1944 case NES_CM_STATE_ESTABLISHED:
615eb715 1945 if (res_type == NES_MPA_REQUEST_REJECT)
9d5ab133 1946 /*BIG problem as we are receiving the MPA.. So should
615eb715
TN		 1947 * not be REJECT.. This is Passive Open.. We can
1948 * only receive it Reject for Active Open...*/
9d5ab133 1949 WARN_ON(1);
9d5ab133
FL		 1950 cm_node->state = NES_CM_STATE_MPAREQ_RCVD;
1951 type = NES_CM_EVENT_MPA_REQ;
1952 atomic_set(&cm_node->passive_state,
615eb715 1953 NES_PASSIVE_STATE_INDICATED);
9d5ab133
FL		 1954 break;
1955 case NES_CM_STATE_MPAREQ_SENT:
109d67e4 1956 cleanup_retrans_entry(cm_node);
9d5ab133
FL		 1957 if (res_type == NES_MPA_REQUEST_REJECT) {
1958 type = NES_CM_EVENT_MPA_REJECT;
1959 cm_node->state = NES_CM_STATE_MPAREJ_RCVD;
1960 } else {
1961 type = NES_CM_EVENT_CONNECTED;
6492cdf3 1962 cm_node->state = NES_CM_STATE_TSA;
9d5ab133 1963 }
6492cdf3 1964
9d5ab133
FL		 1965 break;
1966 default:
1967 WARN_ON(1);
1968 break;
6492cdf3 1969 }
9d5ab133
FL		 1970 dev_kfree_skb_any(skb);
1971 create_event(cm_node, type);
6492cdf3
FL		 1972}
1973
1974static void indicate_pkt_err(struct nes_cm_node *cm_node, struct sk_buff *skb)
1975{
1976 switch (cm_node->state) {
1977 case NES_CM_STATE_SYN_SENT:
1978 case NES_CM_STATE_MPAREQ_SENT:
1979 nes_debug(NES_DBG_CM, "%s[%u] create abort for cm_node=%p "
615eb715
TN		 1980 "listener=%p state=%d\n", __func__, __LINE__, cm_node,
1981 cm_node->listener, cm_node->state);
6492cdf3
FL		 1982 active_open_err(cm_node, skb, 1);
1983 break;
1984 case NES_CM_STATE_ESTABLISHED:
1985 case NES_CM_STATE_SYN_RCVD:
1986 passive_open_err(cm_node, skb, 1);
1987 break;
1988 case NES_CM_STATE_TSA:
1989 default:
1990 drop_packet(skb);
3c2d774c 1991 }
6492cdf3
FL		 1992}
1993
1994static int check_syn(struct nes_cm_node *cm_node, struct tcphdr *tcph,
615eb715 1995 struct sk_buff *skb)
6492cdf3
FL		 1996{
1997 int err;
1998
615eb715 1999 err = ((ntohl(tcph->ack_seq) == cm_node->tcp_cntxt.loc_seq_num)) ? 0 : 1;
6492cdf3
FL		 2000 if (err)
2001 active_open_err(cm_node, skb, 1);
2002
2003 return err;
2004}
2005
2006static int check_seq(struct nes_cm_node *cm_node, struct tcphdr *tcph,
615eb715 2007 struct sk_buff *skb)
6492cdf3
FL		 2008{
2009 int err = 0;
2010 u32 seq;
2011 u32 ack_seq;
2012 u32 loc_seq_num = cm_node->tcp_cntxt.loc_seq_num;
2013 u32 rcv_nxt = cm_node->tcp_cntxt.rcv_nxt;
2014 u32 rcv_wnd;
615eb715 2015
6492cdf3
FL		 2016 seq = ntohl(tcph->seq);
2017 ack_seq = ntohl(tcph->ack_seq);
2018 rcv_wnd = cm_node->tcp_cntxt.rcv_wnd;
2019 if (ack_seq != loc_seq_num)
2020 err = 1;
615eb715 2021 else if (!between(seq, rcv_nxt, (rcv_nxt + rcv_wnd)))
6492cdf3
FL		 2022 err = 1;
2023 if (err) {
2024 nes_debug(NES_DBG_CM, "%s[%u] create abort for cm_node=%p "
615eb715
TN		 2025 "listener=%p state=%d\n", __func__, __LINE__, cm_node,
2026 cm_node->listener, cm_node->state);
6492cdf3
FL		 2027 indicate_pkt_err(cm_node, skb);
2028 nes_debug(NES_DBG_CM, "seq ERROR cm_node =%p seq=0x%08X "
615eb715
TN		 2029 "rcv_nxt=0x%08X rcv_wnd=0x%x\n", cm_node, seq, rcv_nxt,
2030 rcv_wnd);
6492cdf3
FL		 2031 }
2032 return err;
2033}
2034
2035/*
2036 * handle_syn_pkt() is for Passive node. The syn packet is received when a node
2037 * is created with a listener or it may comein as rexmitted packet which in
2038 * that case will be just dropped.
2039 */
6492cdf3 2040static void handle_syn_pkt(struct nes_cm_node *cm_node, struct sk_buff *skb,
615eb715 2041 struct tcphdr *tcph)
6492cdf3
FL		 2042{
2043 int ret;
2044 u32 inc_sequence;
2045 int optionsize;
3c2d774c
GS		 2046
2047 optionsize = (tcph->doff << 2) - sizeof(struct tcphdr);
abb77256 2048 skb_trim(skb, 0);
6492cdf3 2049 inc_sequence = ntohl(tcph->seq);
3c2d774c 2050
6492cdf3
FL		 2051 switch (cm_node->state) {
2052 case NES_CM_STATE_SYN_SENT:
2053 case NES_CM_STATE_MPAREQ_SENT:
2054 /* Rcvd syn on active open connection*/
2055 active_open_err(cm_node, skb, 1);
2056 break;
2057 case NES_CM_STATE_LISTENING:
2058 /* Passive OPEN */
6492cdf3 2059 if (atomic_read(&cm_node->listener->pend_accepts_cnt) >
615eb715 2060 cm_node->listener->backlog) {
6492cdf3 2061 nes_debug(NES_DBG_CM, "drop syn due to backlog "
615eb715 2062 "pressure \n");
6492cdf3
FL		 2063 cm_backlog_drops++;
2064 passive_open_err(cm_node, skb, 0);
2065 break;
2066 }
2067 ret = handle_tcp_options(cm_node, tcph, skb, optionsize,
615eb715 2068 1);
6492cdf3
FL		 2069 if (ret) {
2070 passive_open_err(cm_node, skb, 0);
2071 /* drop pkt */
2072 break;
2073 }
2074 cm_node->tcp_cntxt.rcv_nxt = inc_sequence + 1;
2075 BUG_ON(cm_node->send_entry);
9d5ab133
FL		 2076 cm_node->accept_pend = 1;
2077 atomic_inc(&cm_node->listener->pend_accepts_cnt);
2078
6492cdf3
FL		 2079 cm_node->state = NES_CM_STATE_SYN_RCVD;
2080 send_syn(cm_node, 1, skb);
2081 break;
abb77256
FL		 2082 case NES_CM_STATE_CLOSED:
2083 cleanup_retrans_entry(cm_node);
886f98a3 2084 add_ref_cm_node(cm_node);
abb77256
FL		 2085 send_reset(cm_node, skb);
2086 break;
6492cdf3
FL		 2087 case NES_CM_STATE_TSA:
2088 case NES_CM_STATE_ESTABLISHED:
2089 case NES_CM_STATE_FIN_WAIT1:
2090 case NES_CM_STATE_FIN_WAIT2:
2091 case NES_CM_STATE_MPAREQ_RCVD:
2092 case NES_CM_STATE_LAST_ACK:
2093 case NES_CM_STATE_CLOSING:
2094 case NES_CM_STATE_UNKNOWN:
6492cdf3
FL		 2095 default:
2096 drop_packet(skb);
2097 break;
2098 }
2099}
2100
2101static void handle_synack_pkt(struct nes_cm_node *cm_node, struct sk_buff *skb,
615eb715 2102 struct tcphdr *tcph)
6492cdf3 2103{
6492cdf3
FL		 2104 int ret;
2105 u32 inc_sequence;
2106 int optionsize;
2107
2108 optionsize = (tcph->doff << 2) - sizeof(struct tcphdr);
abb77256 2109 skb_trim(skb, 0);
6492cdf3
FL		 2110 inc_sequence = ntohl(tcph->seq);
2111 switch (cm_node->state) {
2112 case NES_CM_STATE_SYN_SENT:
9d5ab133 2113 cleanup_retrans_entry(cm_node);
6492cdf3
FL		 2114 /* active open */
2115 if (check_syn(cm_node, tcph, skb))
2116 return;
2117 cm_node->tcp_cntxt.rem_ack_num = ntohl(tcph->ack_seq);
2118 /* setup options */
2119 ret = handle_tcp_options(cm_node, tcph, skb, optionsize, 0);
2120 if (ret) {
2121 nes_debug(NES_DBG_CM, "cm_node=%p tcp_options failed\n",
615eb715 2122 cm_node);
6492cdf3
FL		 2123 break;
2124 }
2125 cleanup_retrans_entry(cm_node);
2126 cm_node->tcp_cntxt.rcv_nxt = inc_sequence + 1;
2127 send_mpa_request(cm_node, skb);
2128 cm_node->state = NES_CM_STATE_MPAREQ_SENT;
2129 break;
2130 case NES_CM_STATE_MPAREQ_RCVD:
2131 /* passive open, so should not be here */
2132 passive_open_err(cm_node, skb, 1);
2133 break;
abb77256 2134 case NES_CM_STATE_LISTENING:
886f98a3
FL		 2135 cm_node->tcp_cntxt.loc_seq_num = ntohl(tcph->ack_seq);
2136 cleanup_retrans_entry(cm_node);
2137 cm_node->state = NES_CM_STATE_CLOSED;
2138 send_reset(cm_node, skb);
2139 break;
abb77256
FL		 2140 case NES_CM_STATE_CLOSED:
2141 cm_node->tcp_cntxt.loc_seq_num = ntohl(tcph->ack_seq);
2142 cleanup_retrans_entry(cm_node);
886f98a3 2143 add_ref_cm_node(cm_node);
abb77256
FL		 2144 send_reset(cm_node, skb);
2145 break;
6492cdf3
FL		 2146 case NES_CM_STATE_ESTABLISHED:
2147 case NES_CM_STATE_FIN_WAIT1:
2148 case NES_CM_STATE_FIN_WAIT2:
2149 case NES_CM_STATE_LAST_ACK:
2150 case NES_CM_STATE_TSA:
2151 case NES_CM_STATE_CLOSING:
2152 case NES_CM_STATE_UNKNOWN:
6492cdf3
FL		 2153 case NES_CM_STATE_MPAREQ_SENT:
2154 default:
2155 drop_packet(skb);
2156 break;
2157 }
2158}
3c2d774c 2159
109d67e4 2160static int handle_ack_pkt(struct nes_cm_node *cm_node, struct sk_buff *skb,
615eb715 2161 struct tcphdr *tcph)
6492cdf3
FL		 2162{
2163 int datasize = 0;
2164 u32 inc_sequence;
109d67e4 2165 int ret = 0;
abb77256 2166 int optionsize;
615eb715 2167
abb77256 2168 optionsize = (tcph->doff << 2) - sizeof(struct tcphdr);
abb77256 2169
6492cdf3 2170 if (check_seq(cm_node, tcph, skb))
109d67e4 2171 return -EINVAL;
6492cdf3
FL		 2172
2173 skb_pull(skb, tcph->doff << 2);
3c2d774c 2174 inc_sequence = ntohl(tcph->seq);
6492cdf3 2175 datasize = skb->len;
6492cdf3
FL		 2176 switch (cm_node->state) {
2177 case NES_CM_STATE_SYN_RCVD:
2178 /* Passive OPEN */
109d67e4 2179 cleanup_retrans_entry(cm_node);
abb77256
FL		 2180 ret = handle_tcp_options(cm_node, tcph, skb, optionsize, 1);
2181 if (ret)
2182 break;
6492cdf3
FL		 2183 cm_node->tcp_cntxt.rem_ack_num = ntohl(tcph->ack_seq);
2184 cm_node->state = NES_CM_STATE_ESTABLISHED;
2185 if (datasize) {
2186 cm_node->tcp_cntxt.rcv_nxt = inc_sequence + datasize;
230da36a 2187 nes_get_remote_addr(cm_node);
9d5ab133 2188 handle_rcv_mpa(cm_node, skb);
615eb715 2189 } else { /* rcvd ACK only */
6492cdf3 2190 dev_kfree_skb_any(skb);
615eb715 2191 }
6492cdf3
FL		 2192 break;
2193 case NES_CM_STATE_ESTABLISHED:
2194 /* Passive OPEN */
9d5ab133 2195 cleanup_retrans_entry(cm_node);
6492cdf3
FL		 2196 if (datasize) {
2197 cm_node->tcp_cntxt.rcv_nxt = inc_sequence + datasize;
9d5ab133 2198 handle_rcv_mpa(cm_node, skb);
615eb715 2199 } else {
6492cdf3 2200 drop_packet(skb);
615eb715 2201 }
6492cdf3
FL		 2202 break;
2203 case NES_CM_STATE_MPAREQ_SENT:
2204 cm_node->tcp_cntxt.rem_ack_num = ntohl(tcph->ack_seq);
2205 if (datasize) {
2206 cm_node->tcp_cntxt.rcv_nxt = inc_sequence + datasize;
9d5ab133 2207 handle_rcv_mpa(cm_node, skb);
615eb715 2208 } else { /* Could be just an ack pkt.. */
6492cdf3 2209 dev_kfree_skb_any(skb);
615eb715 2210 }
6492cdf3 2211 break;
abb77256 2212 case NES_CM_STATE_LISTENING:
886f98a3
FL		 2213 cleanup_retrans_entry(cm_node);
2214 cm_node->state = NES_CM_STATE_CLOSED;
2215 send_reset(cm_node, skb);
2216 break;
abb77256
FL		 2217 case NES_CM_STATE_CLOSED:
2218 cleanup_retrans_entry(cm_node);
886f98a3 2219 add_ref_cm_node(cm_node);
abb77256
FL		 2220 send_reset(cm_node, skb);
2221 break;
9d5ab133 2222 case NES_CM_STATE_LAST_ACK:
109d67e4 2223 case NES_CM_STATE_CLOSING:
9d5ab133
FL		 2224 cleanup_retrans_entry(cm_node);
2225 cm_node->state = NES_CM_STATE_CLOSED;
2226 cm_node->cm_id->rem_ref(cm_node->cm_id);
9d5ab133
FL		 2227 rem_ref_cm_node(cm_node->cm_core, cm_node);
2228 drop_packet(skb);
2229 break;
6492cdf3 2230 case NES_CM_STATE_FIN_WAIT1:
9d5ab133
FL		 2231 cleanup_retrans_entry(cm_node);
2232 drop_packet(skb);
2233 cm_node->state = NES_CM_STATE_FIN_WAIT2;
2234 break;
6492cdf3
FL		 2235 case NES_CM_STATE_SYN_SENT:
2236 case NES_CM_STATE_FIN_WAIT2:
2237 case NES_CM_STATE_TSA:
6492cdf3 2238 case NES_CM_STATE_MPAREQ_RCVD:
6492cdf3
FL		 2239 case NES_CM_STATE_UNKNOWN:
2240 default:
109d67e4 2241 cleanup_retrans_entry(cm_node);
6492cdf3
FL		 2242 drop_packet(skb);
2243 break;
3c2d774c 2244 }
109d67e4 2245 return ret;
6492cdf3 2246}
3c2d774c 2247
3c2d774c
GS		 2248
2249
6492cdf3 2250static int handle_tcp_options(struct nes_cm_node *cm_node, struct tcphdr *tcph,
615eb715 2251 struct sk_buff *skb, int optionsize, int passive)
6492cdf3
FL		 2252{
2253 u8 *optionsloc = (u8 *)&tcph[1];
615eb715 2254
3c2d774c 2255 if (optionsize) {
6492cdf3 2256 if (process_options(cm_node, optionsloc, optionsize,
615eb715 2257 (u32)tcph->syn)) {
6492cdf3 2258 nes_debug(NES_DBG_CM, "%s: Node %p, Sending RESET\n",
615eb715 2259 __func__, cm_node);
6492cdf3 2260 if (passive)
abb77256 2261 passive_open_err(cm_node, skb, 1);
6492cdf3 2262 else
abb77256 2263 active_open_err(cm_node, skb, 1);
6492cdf3 2264 return 1;
3c2d774c 2265 }
6492cdf3 2266 }
3c2d774c
GS		 2267
2268 cm_node->tcp_cntxt.snd_wnd = ntohs(tcph->window) <<
615eb715 2269 cm_node->tcp_cntxt.snd_wscale;
3c2d774c 2270
6492cdf3 2271 if (cm_node->tcp_cntxt.snd_wnd > cm_node->tcp_cntxt.max_snd_wnd)
3c2d774c 2272 cm_node->tcp_cntxt.max_snd_wnd = cm_node->tcp_cntxt.snd_wnd;
6492cdf3
FL		 2273 return 0;
2274}
3c2d774c 2275
6492cdf3
FL		 2276/*
2277 * active_open_err() will send reset() if flag set..
2278 * It will also send ABORT event.
2279 */
6492cdf3 2280static void active_open_err(struct nes_cm_node *cm_node, struct sk_buff *skb,
615eb715 2281 int reset)
6492cdf3
FL		 2282{
2283 cleanup_retrans_entry(cm_node);
2284 if (reset) {
2285 nes_debug(NES_DBG_CM, "ERROR active err called for cm_node=%p, "
615eb715 2286 "state=%d\n", cm_node, cm_node->state);
6492cdf3
FL		 2287 add_ref_cm_node(cm_node);
2288 send_reset(cm_node, skb);
615eb715 2289 } else {
6492cdf3 2290 dev_kfree_skb_any(skb);
615eb715 2291 }
3c2d774c 2292
6492cdf3
FL		 2293 cm_node->state = NES_CM_STATE_CLOSED;
2294 create_event(cm_node, NES_CM_EVENT_ABORTED);
2295}
3c2d774c 2296
6492cdf3
FL		 2297/*
2298 * passive_open_err() will either do a reset() or will free up the skb and
2299 * remove the cm_node.
2300 */
6492cdf3 2301static void passive_open_err(struct nes_cm_node *cm_node, struct sk_buff *skb,
615eb715 2302 int reset)
6492cdf3
FL		 2303{
2304 cleanup_retrans_entry(cm_node);
2305 cm_node->state = NES_CM_STATE_CLOSED;
2306 if (reset) {
2307 nes_debug(NES_DBG_CM, "passive_open_err sending RST for "
615eb715 2308 "cm_node=%p state =%d\n", cm_node, cm_node->state);
6492cdf3
FL		 2309 send_reset(cm_node, skb);
2310 } else {
2311 dev_kfree_skb_any(skb);
2312 rem_ref_cm_node(cm_node->cm_core, cm_node);
3c2d774c 2313 }
6492cdf3 2314}
3c2d774c 2315
6492cdf3
FL		 2316/*
2317 * free_retrans_entry() routines assumes that the retrans_list_lock has
2318 * been acquired before calling.
2319 */
2320static void free_retrans_entry(struct nes_cm_node *cm_node)
2321{
2322 struct nes_timer_entry *send_entry;
615eb715 2323
6492cdf3
FL		 2324 send_entry = cm_node->send_entry;
2325 if (send_entry) {
2326 cm_node->send_entry = NULL;
2327 dev_kfree_skb_any(send_entry->skb);
2328 kfree(send_entry);
2329 rem_ref_cm_node(cm_node->cm_core, cm_node);
3c2d774c 2330 }
6492cdf3 2331}
3c2d774c 2332
6492cdf3
FL		 2333static void cleanup_retrans_entry(struct nes_cm_node *cm_node)
2334{
2335 unsigned long flags;
3c2d774c 2336
6492cdf3
FL		 2337 spin_lock_irqsave(&cm_node->retrans_list_lock, flags);
2338 free_retrans_entry(cm_node);
2339 spin_unlock_irqrestore(&cm_node->retrans_list_lock, flags);
3c2d774c
GS		 2340}
2341
6492cdf3
FL		 2342/**
2343 * process_packet
2344 * Returns skb if to be freed, else it will return NULL if already used..
2345 */
2346static void process_packet(struct nes_cm_node *cm_node, struct sk_buff *skb,
615eb715 2347 struct nes_cm_core *cm_core)
6492cdf3 2348{
615eb715 2349 enum nes_tcpip_pkt_type pkt_type = NES_PKT_TYPE_UNKNOWN;
6492cdf3 2350 struct tcphdr *tcph = tcp_hdr(skb);
615eb715 2351 u32 fin_set = 0;
109d67e4 2352 int ret = 0;
615eb715 2353
6492cdf3
FL		 2354 skb_pull(skb, ip_hdr(skb)->ihl << 2);
2355
2356 nes_debug(NES_DBG_CM, "process_packet: cm_node=%p state =%d syn=%d "
615eb715
TN		 2357 "ack=%d rst=%d fin=%d\n", cm_node, cm_node->state, tcph->syn,
2358 tcph->ack, tcph->rst, tcph->fin);
6492cdf3 2359
615eb715 2360 if (tcph->rst) {
6492cdf3 2361 pkt_type = NES_PKT_TYPE_RST;
615eb715 2362 } else if (tcph->syn) {
6492cdf3
FL		 2363 pkt_type = NES_PKT_TYPE_SYN;
2364 if (tcph->ack)
2365 pkt_type = NES_PKT_TYPE_SYNACK;
615eb715 2366 } else if (tcph->ack) {
6492cdf3 2367 pkt_type = NES_PKT_TYPE_ACK;
615eb715 2368 }
9d5ab133
FL		 2369 if (tcph->fin)
2370 fin_set = 1;
6492cdf3
FL		 2371
2372 switch (pkt_type) {
2373 case NES_PKT_TYPE_SYN:
2374 handle_syn_pkt(cm_node, skb, tcph);
2375 break;
2376 case NES_PKT_TYPE_SYNACK:
2377 handle_synack_pkt(cm_node, skb, tcph);
2378 break;
2379 case NES_PKT_TYPE_ACK:
109d67e4
FL		 2380 ret = handle_ack_pkt(cm_node, skb, tcph);
2381 if (fin_set && !ret)
9d5ab133 2382 handle_fin_pkt(cm_node);
6492cdf3
FL		 2383 break;
2384 case NES_PKT_TYPE_RST:
2385 handle_rst_pkt(cm_node, skb, tcph);
2386 break;
6492cdf3 2387 default:
109d67e4 2388 if ((fin_set) && (!check_seq(cm_node, tcph, skb)))
9d5ab133 2389 handle_fin_pkt(cm_node);
109d67e4 2390 drop_packet(skb);
6492cdf3
FL		 2391 break;
2392 }
2393}
3c2d774c
GS		 2394
2395/**
2396 * mini_cm_listen - create a listen node with params
2397 */
2398static struct nes_cm_listener *mini_cm_listen(struct nes_cm_core *cm_core,
5647263c 2399 struct nes_vnic *nesvnic, struct nes_cm_info *cm_info)
3c2d774c
GS		 2400{
2401 struct nes_cm_listener *listener;
5647263c
TN		 2402 struct iwpm_dev_data pm_reg_msg;
2403 struct iwpm_sa_data pm_msg;
3c2d774c 2404 unsigned long flags;
5647263c 2405 int iwpm_err = 0;
3c2d774c
GS		 2406
2407 nes_debug(NES_DBG_CM, "Search for 0x%08x : 0x%04x\n",
615eb715 2408 cm_info->loc_addr, cm_info->loc_port);
3c2d774c
GS		 2409
2410 /* cannot have multiple matching listeners */
5647263c
TN		 2411 listener = find_listener(cm_core, cm_info->loc_addr, cm_info->loc_port,
2412 NES_CM_LISTENER_EITHER_STATE, 1);
2413
3c2d774c
GS		 2414 if (listener && listener->listener_state == NES_CM_LISTENER_ACTIVE_STATE) {
2415 /* find automatically incs ref count ??? */
2416 atomic_dec(&listener->ref_count);
2417 nes_debug(NES_DBG_CM, "Not creating listener since it already exists\n");
2418 return NULL;
2419 }
2420
2421 if (!listener) {
5647263c
TN		 2422 nes_form_reg_msg(nesvnic, &pm_reg_msg);
2423 iwpm_err = iwpm_register_pid(&pm_reg_msg, RDMA_NL_NES);
2424 if (iwpm_err) {
2425 nes_debug(NES_DBG_NLMSG,
2426 "Port Mapper reg pid fail (err = %d).\n", iwpm_err);
2427 }
2428 if (iwpm_valid_pid() && !iwpm_err) {
2429 nes_form_pm_msg(cm_info, &pm_msg);
2430 iwpm_err = iwpm_add_mapping(&pm_msg, RDMA_NL_NES);
2431 if (iwpm_err)
2432 nes_debug(NES_DBG_NLMSG,
2433 "Port Mapper query fail (err = %d).\n", iwpm_err);
2434 else
2435 nes_record_pm_msg(cm_info, &pm_msg);
2436 }
2437
3c2d774c
GS		 2438 /* create a CM listen node (1/2 node to compare incoming traffic to) */
2439 listener = kzalloc(sizeof(*listener), GFP_ATOMIC);
2440 if (!listener) {
2441 nes_debug(NES_DBG_CM, "Not creating listener memory allocation failed\n");
2442 return NULL;
2443 }
2444
5647263c
TN		 2445 listener->loc_addr = cm_info->loc_addr;
2446 listener->loc_port = cm_info->loc_port;
2447 listener->mapped_loc_addr = cm_info->mapped_loc_addr;
2448 listener->mapped_loc_port = cm_info->mapped_loc_port;
3c2d774c
GS		 2449 listener->reused_node = 0;
2450
2451 atomic_set(&listener->ref_count, 1);
2452 }
2453 /* pasive case */
2454 /* find already inc'ed the ref count */
2455 else {
2456 listener->reused_node = 1;
2457 }
2458
2459 listener->cm_id = cm_info->cm_id;
2460 atomic_set(&listener->pend_accepts_cnt, 0);
2461 listener->cm_core = cm_core;
2462 listener->nesvnic = nesvnic;
2463 atomic_inc(&cm_core->node_cnt);
3c2d774c 2464
3c2d774c
GS		 2465 listener->conn_type = cm_info->conn_type;
2466 listener->backlog = cm_info->backlog;
2467 listener->listener_state = NES_CM_LISTENER_ACTIVE_STATE;
2468
2469 if (!listener->reused_node) {
2470 spin_lock_irqsave(&cm_core->listen_list_lock, flags);
2471 list_add(&listener->list, &cm_core->listen_list.list);
2472 spin_unlock_irqrestore(&cm_core->listen_list_lock, flags);
2473 atomic_inc(&cm_core->listen_node_cnt);
2474 }
2475
2476 nes_debug(NES_DBG_CM, "Api - listen(): addr=0x%08X, port=0x%04x,"
615eb715
TN		 2477 " listener = %p, backlog = %d, cm_id = %p.\n",
2478 cm_info->loc_addr, cm_info->loc_port,
2479 listener, listener->backlog, listener->cm_id);
3c2d774c
GS		 2480
2481 return listener;
2482}
2483
2484
2485/**
2486 * mini_cm_connect - make a connection node with params
2487 */
54c86a8c 2488static struct nes_cm_node *mini_cm_connect(struct nes_cm_core *cm_core,
615eb715
TN		 2489 struct nes_vnic *nesvnic, u16 private_data_len,
2490 void *private_data, struct nes_cm_info *cm_info)
3c2d774c
GS		 2491{
2492 int ret = 0;
2493 struct nes_cm_node *cm_node;
2494 struct nes_cm_listener *loopbackremotelistener;
2495 struct nes_cm_node *loopbackremotenode;
2496 struct nes_cm_info loopback_cm_info;
615eb715 2497 u8 *start_buff;
3c2d774c
GS		 2498
2499 /* create a CM connection node */
2500 cm_node = make_cm_node(cm_core, nesvnic, cm_info, NULL);
2501 if (!cm_node)
2502 return NULL;
2503
7495ab68 2504 /* set our node side to client (active) side */
3c2d774c
GS		 2505 cm_node->tcp_cntxt.client = 1;
2506 cm_node->tcp_cntxt.rcv_wscale = NES_CM_DEFAULT_RCV_WND_SCALE;
2507
2508 if (cm_info->loc_addr == cm_info->rem_addr) {
6492cdf3 2509 loopbackremotelistener = find_listener(cm_core,
5647263c
TN		 2510 cm_node->mapped_loc_addr, cm_node->mapped_rem_port,
2511 NES_CM_LISTENER_ACTIVE_STATE, 0);
3c2d774c
GS		 2512 if (loopbackremotelistener == NULL) {
2513 create_event(cm_node, NES_CM_EVENT_ABORTED);
2514 } else {
3c2d774c
GS		 2515 loopback_cm_info = *cm_info;
2516 loopback_cm_info.loc_port = cm_info->rem_port;
2517 loopback_cm_info.rem_port = cm_info->loc_port;
5647263c
TN		 2518 loopback_cm_info.mapped_loc_port =
2519 cm_info->mapped_rem_port;
2520 loopback_cm_info.mapped_rem_port =
2521 cm_info->mapped_loc_port;
3c2d774c 2522 loopback_cm_info.cm_id = loopbackremotelistener->cm_id;
6492cdf3 2523 loopbackremotenode = make_cm_node(cm_core, nesvnic,
615eb715 2524 &loopback_cm_info, loopbackremotelistener);
79fc3d74
FL		 2525 if (!loopbackremotenode) {
2526 rem_ref_cm_node(cm_node->cm_core, cm_node);
2527 return NULL;
2528 }
2529 atomic_inc(&cm_loopbacks);
3c2d774c 2530 loopbackremotenode->loopbackpartner = cm_node;
6492cdf3
FL		 2531 loopbackremotenode->tcp_cntxt.rcv_wscale =
2532 NES_CM_DEFAULT_RCV_WND_SCALE;
3c2d774c 2533 cm_node->loopbackpartner = loopbackremotenode;
6492cdf3 2534 memcpy(loopbackremotenode->mpa_frame_buf, private_data,
615eb715 2535 private_data_len);
6492cdf3 2536 loopbackremotenode->mpa_frame_size = private_data_len;
3c2d774c 2537
6492cdf3
FL		 2538 /* we are done handling this state. */
2539 /* set node to a TSA state */
3c2d774c 2540 cm_node->state = NES_CM_STATE_TSA;
6492cdf3
FL		 2541 cm_node->tcp_cntxt.rcv_nxt =
2542 loopbackremotenode->tcp_cntxt.loc_seq_num;
2543 loopbackremotenode->tcp_cntxt.rcv_nxt =
2544 cm_node->tcp_cntxt.loc_seq_num;
2545 cm_node->tcp_cntxt.max_snd_wnd =
2546 loopbackremotenode->tcp_cntxt.rcv_wnd;
2547 loopbackremotenode->tcp_cntxt.max_snd_wnd =
2548 cm_node->tcp_cntxt.rcv_wnd;
2549 cm_node->tcp_cntxt.snd_wnd =
2550 loopbackremotenode->tcp_cntxt.rcv_wnd;
2551 loopbackremotenode->tcp_cntxt.snd_wnd =
2552 cm_node->tcp_cntxt.rcv_wnd;
2553 cm_node->tcp_cntxt.snd_wscale =
2554 loopbackremotenode->tcp_cntxt.rcv_wscale;
2555 loopbackremotenode->tcp_cntxt.snd_wscale =
2556 cm_node->tcp_cntxt.rcv_wscale;
9d5ab133 2557 loopbackremotenode->state = NES_CM_STATE_MPAREQ_RCVD;
3c2d774c
GS		 2558 create_event(loopbackremotenode, NES_CM_EVENT_MPA_REQ);
2559 }
2560 return cm_node;
2561 }
2562
615eb715
TN		 2563 start_buff = &cm_node->mpa_frame_buf[0] + sizeof(struct ietf_mpa_v2);
2564 cm_node->mpa_frame_size = private_data_len;
6492cdf3 2565
615eb715 2566 memcpy(start_buff, private_data, private_data_len);
3c2d774c
GS		 2567
2568 /* send a syn and goto syn sent state */
2569 cm_node->state = NES_CM_STATE_SYN_SENT;
6492cdf3
FL		 2570 ret = send_syn(cm_node, 0, NULL);
2571
2572 if (ret) {
2573 /* error in sending the syn free up the cm_node struct */
2574 nes_debug(NES_DBG_CM, "Api - connect() FAILED: dest "
615eb715
TN		 2575 "addr=0x%08X, port=0x%04x, cm_node=%p, cm_id = %p.\n",
2576 cm_node->rem_addr, cm_node->rem_port, cm_node,
2577 cm_node->cm_id);
6492cdf3
FL		 2578 rem_ref_cm_node(cm_node->cm_core, cm_node);
2579 cm_node = NULL;
2580 }
3c2d774c 2581
615eb715 2582 if (cm_node) {
6492cdf3 2583 nes_debug(NES_DBG_CM, "Api - connect(): dest addr=0x%08X,"
615eb715
TN		 2584 "port=0x%04x, cm_node=%p, cm_id = %p.\n",
2585 cm_node->rem_addr, cm_node->rem_port, cm_node,
2586 cm_node->cm_id);
2587 }
3c2d774c
GS		 2588
2589 return cm_node;
2590}
2591
2592
2593/**
2594 * mini_cm_accept - accept a connection
2595 * This function is never called
2596 */
615eb715 2597static int mini_cm_accept(struct nes_cm_core *cm_core, struct nes_cm_node *cm_node)
3c2d774c
GS		 2598{
2599 return 0;
2600}
2601
2602
2603/**
2604 * mini_cm_reject - reject and teardown a connection
2605 */
615eb715 2606static int mini_cm_reject(struct nes_cm_core *cm_core, struct nes_cm_node *cm_node)
3c2d774c
GS		 2607{
2608 int ret = 0;
9d5ab133 2609 int err = 0;
183ecfa3 2610 int passive_state;
9d5ab133
FL		 2611 struct nes_cm_event event;
2612 struct iw_cm_id *cm_id = cm_node->cm_id;
2613 struct nes_cm_node *loopback = cm_node->loopbackpartner;
3c2d774c 2614
6492cdf3 2615 nes_debug(NES_DBG_CM, "%s cm_node=%p type=%d state=%d\n",
615eb715 2616 __func__, cm_node, cm_node->tcp_cntxt.client, cm_node->state);
3c2d774c 2617
6492cdf3
FL		 2618 if (cm_node->tcp_cntxt.client)
2619 return ret;
2620 cleanup_retrans_entry(cm_node);
3c2d774c 2621
9d5ab133
FL		 2622 if (!loopback) {
2623 passive_state = atomic_add_return(1, &cm_node->passive_state);
2624 if (passive_state == NES_SEND_RESET_EVENT) {
2625 cm_node->state = NES_CM_STATE_CLOSED;
2626 rem_ref_cm_node(cm_core, cm_node);
2627 } else {
c5a7d489
FL		 2628 if (cm_node->state == NES_CM_STATE_LISTENER_DESTROYED) {
2629 rem_ref_cm_node(cm_core, cm_node);
2630 } else {
2631 ret = send_mpa_reject(cm_node);
2632 if (ret) {
2633 cm_node->state = NES_CM_STATE_CLOSED;
2634 err = send_reset(cm_node, NULL);
2635 if (err)
2636 WARN_ON(1);
615eb715 2637 } else {
c5a7d489 2638 cm_id->add_ref(cm_id);
615eb715 2639 }
c5a7d489 2640 }
9d5ab133
FL		 2641 }
2642 } else {
2643 cm_node->cm_id = NULL;
c5a7d489
FL		 2644 if (cm_node->state == NES_CM_STATE_LISTENER_DESTROYED) {
2645 rem_ref_cm_node(cm_core, cm_node);
2646 rem_ref_cm_node(cm_core, loopback);
2647 } else {
2648 event.cm_node = loopback;
2649 event.cm_info.rem_addr = loopback->rem_addr;
2650 event.cm_info.loc_addr = loopback->loc_addr;
2651 event.cm_info.rem_port = loopback->rem_port;
2652 event.cm_info.loc_port = loopback->loc_port;
2653 event.cm_info.cm_id = loopback->cm_id;
2654 cm_event_mpa_reject(&event);
2655 rem_ref_cm_node(cm_core, cm_node);
2656 loopback->state = NES_CM_STATE_CLOSING;
9d5ab133 2657
c5a7d489
FL		 2658 cm_id = loopback->cm_id;
2659 rem_ref_cm_node(cm_core, loopback);
2660 cm_id->rem_ref(cm_id);
2661 }
9d5ab133
FL		 2662 }
2663
3c2d774c
GS		 2664 return ret;
2665}
2666
2667
2668/**
2669 * mini_cm_close
2670 */
1a855fbf 2671static int mini_cm_close(struct nes_cm_core *cm_core, struct nes_cm_node *cm_node)
3c2d774c
GS		 2672{
2673 int ret = 0;
2674
2675 if (!cm_core || !cm_node)
2676 return -EINVAL;
2677
2678 switch (cm_node->state) {
6492cdf3
FL		 2679 case NES_CM_STATE_SYN_RCVD:
2680 case NES_CM_STATE_SYN_SENT:
2681 case NES_CM_STATE_ONE_SIDE_ESTABLISHED:
2682 case NES_CM_STATE_ESTABLISHED:
2683 case NES_CM_STATE_ACCEPTING:
2684 case NES_CM_STATE_MPAREQ_SENT:
2685 case NES_CM_STATE_MPAREQ_RCVD:
2686 cleanup_retrans_entry(cm_node);
2687 send_reset(cm_node, NULL);
2688 break;
2689 case NES_CM_STATE_CLOSE_WAIT:
2690 cm_node->state = NES_CM_STATE_LAST_ACK;
2691 send_fin(cm_node, NULL);
2692 break;
2693 case NES_CM_STATE_FIN_WAIT1:
2694 case NES_CM_STATE_FIN_WAIT2:
2695 case NES_CM_STATE_LAST_ACK:
2696 case NES_CM_STATE_TIME_WAIT:
2697 case NES_CM_STATE_CLOSING:
2698 ret = -1;
2699 break;
2700 case NES_CM_STATE_LISTENING:
886f98a3
FL		 2701 cleanup_retrans_entry(cm_node);
2702 send_reset(cm_node, NULL);
2703 break;
2704 case NES_CM_STATE_MPAREJ_RCVD:
6492cdf3
FL		 2705 case NES_CM_STATE_UNKNOWN:
2706 case NES_CM_STATE_INITED:
2707 case NES_CM_STATE_CLOSED:
c5a7d489 2708 case NES_CM_STATE_LISTENER_DESTROYED:
6492cdf3
FL		 2709 ret = rem_ref_cm_node(cm_core, cm_node);
2710 break;
2711 case NES_CM_STATE_TSA:
2712 if (cm_node->send_entry)
2713 printk(KERN_ERR "ERROR Close got called from STATE_TSA "
615eb715 2714 "send_entry=%p\n", cm_node->send_entry);
6492cdf3
FL		 2715 ret = rem_ref_cm_node(cm_core, cm_node);
2716 break;
3c2d774c 2717 }
3c2d774c
GS		 2718 return ret;
2719}
2720
2721
2722/**
2723 * recv_pkt - recv an ETHERNET packet, and process it through CM
2724 * node state machine
2725 */
4a14f6a7 2726static int mini_cm_recv_pkt(struct nes_cm_core *cm_core,
615eb715 2727 struct nes_vnic *nesvnic, struct sk_buff *skb)
3c2d774c
GS		 2728{
2729 struct nes_cm_node *cm_node = NULL;
2730 struct nes_cm_listener *listener = NULL;
2731 struct iphdr *iph;
2732 struct tcphdr *tcph;
2733 struct nes_cm_info nfo;
4a14f6a7 2734 int skb_handled = 1;
03080e5c 2735 __be32 tmp_daddr, tmp_saddr;
3c2d774c 2736
6492cdf3 2737 if (!skb)
4a14f6a7 2738 return 0;
615eb715 2739 if (skb->len < sizeof(struct iphdr) + sizeof(struct tcphdr))
4a14f6a7 2740 return 0;
3c2d774c
GS		 2741
2742 iph = (struct iphdr *)skb->data;
2743 tcph = (struct tcphdr *)(skb->data + sizeof(struct iphdr));
3c2d774c
GS		 2744
2745 nfo.loc_addr = ntohl(iph->daddr);
2746 nfo.loc_port = ntohs(tcph->dest);
2747 nfo.rem_addr = ntohl(iph->saddr);
2748 nfo.rem_port = ntohs(tcph->source);
2749
5647263c
TN		 2750 /* If port mapper is available these should be mapped address info */
2751 nfo.mapped_loc_addr = ntohl(iph->daddr);
2752 nfo.mapped_loc_port = ntohs(tcph->dest);
2753 nfo.mapped_rem_addr = ntohl(iph->saddr);
2754 nfo.mapped_rem_port = ntohs(tcph->source);
2755
03080e5c
HH		 2756 tmp_daddr = cpu_to_be32(iph->daddr);
2757 tmp_saddr = cpu_to_be32(iph->saddr);
2758
63779436 2759 nes_debug(NES_DBG_CM, "Received packet: dest=%pI4:0x%04X src=%pI4:0x%04X\n",
03080e5c 2760 &tmp_daddr, tcph->dest, &tmp_saddr, tcph->source);
3c2d774c 2761
6492cdf3
FL		 2762 do {
2763 cm_node = find_node(cm_core,
5647263c
TN		 2764 nfo.mapped_rem_port, nfo.mapped_rem_addr,
2765 nfo.mapped_loc_port, nfo.mapped_loc_addr);
3c2d774c 2766
3c2d774c 2767 if (!cm_node) {
6492cdf3
FL		 2768 /* Only type of packet accepted are for */
2769 /* the PASSIVE open (syn only) */
2770 if ((!tcph->syn) || (tcph->ack)) {
4a14f6a7 2771 skb_handled = 0;
6492cdf3
FL		 2772 break;
2773 }
5647263c
TN		 2774 listener = find_listener(cm_core, nfo.mapped_loc_addr,
2775 nfo.mapped_loc_port,
2776 NES_CM_LISTENER_ACTIVE_STATE, 0);
4a14f6a7
FL		 2777 if (!listener) {
2778 nfo.cm_id = NULL;
2779 nfo.conn_type = 0;
2780 nes_debug(NES_DBG_CM, "Unable to find listener for the pkt\n");
2781 skb_handled = 0;
6492cdf3
FL		 2782 break;
2783 }
4a14f6a7
FL		 2784 nfo.cm_id = listener->cm_id;
2785 nfo.conn_type = listener->conn_type;
6492cdf3 2786 cm_node = make_cm_node(cm_core, nesvnic, &nfo,
615eb715 2787 listener);
6492cdf3
FL		 2788 if (!cm_node) {
2789 nes_debug(NES_DBG_CM, "Unable to allocate "
615eb715 2790 "node\n");
6492cdf3 2791 cm_packets_dropped++;
3c2d774c 2792 atomic_dec(&listener->ref_count);
6492cdf3
FL		 2793 dev_kfree_skb_any(skb);
2794 break;
3c2d774c 2795 }
6492cdf3
FL		 2796 if (!tcph->rst && !tcph->fin) {
2797 cm_node->state = NES_CM_STATE_LISTENING;
2798 } else {
2799 cm_packets_dropped++;
2800 rem_ref_cm_node(cm_core, cm_node);
2801 dev_kfree_skb_any(skb);
2802 break;
3c2d774c 2803 }
6492cdf3
FL		 2804 add_ref_cm_node(cm_node);
2805 } else if (cm_node->state == NES_CM_STATE_TSA) {
0f0bee8b
FL		 2806 if (cm_node->nesqp->pau_mode)
2807 nes_queue_mgt_skbs(skb, nesvnic, cm_node->nesqp);
2808 else {
2809 rem_ref_cm_node(cm_core, cm_node);
2810 atomic_inc(&cm_accel_dropped_pkts);
2811 dev_kfree_skb_any(skb);
2812 }
6492cdf3 2813 break;
3c2d774c 2814 }
4a14f6a7
FL		 2815 skb_reset_network_header(skb);
2816 skb_set_transport_header(skb, sizeof(*tcph));
2817 skb->len = ntohs(iph->tot_len);
6492cdf3
FL		 2818 process_packet(cm_node, skb, cm_core);
2819 rem_ref_cm_node(cm_core, cm_node);
2820 } while (0);
4a14f6a7 2821 return skb_handled;
3c2d774c
GS		 2822}
2823
2824
2825/**
2826 * nes_cm_alloc_core - allocate a top level instance of a cm core
2827 */
1a855fbf 2828static struct nes_cm_core *nes_cm_alloc_core(void)
3c2d774c 2829{
3c2d774c 2830 struct nes_cm_core *cm_core;
3c2d774c
GS		 2831
2832 /* setup the CM core */
2833 /* alloc top level core control structure */
2834 cm_core = kzalloc(sizeof(*cm_core), GFP_KERNEL);
2835 if (!cm_core)
2836 return NULL;
2837
2838 INIT_LIST_HEAD(&cm_core->connected_nodes);
2839 init_timer(&cm_core->tcp_timer);
2840 cm_core->tcp_timer.function = nes_cm_timer_tick;
2841
615eb715 2842 cm_core->mtu = NES_CM_DEFAULT_MTU;
3c2d774c
GS		 2843 cm_core->state = NES_CM_STATE_INITED;
2844 cm_core->free_tx_pkt_max = NES_CM_DEFAULT_FREE_PKTS;
2845
3c2d774c
GS		 2846 atomic_set(&cm_core->events_posted, 0);
2847
3c2d774c
GS		 2848 cm_core->api = &nes_cm_api;
2849
2850 spin_lock_init(&cm_core->ht_lock);
2851 spin_lock_init(&cm_core->listen_list_lock);
2852
2853 INIT_LIST_HEAD(&cm_core->listen_list.list);
2854
2855 nes_debug(NES_DBG_CM, "Init CM Core completed -- cm_core=%p\n", cm_core);
2856
2857 nes_debug(NES_DBG_CM, "Enable QUEUE EVENTS\n");
2858 cm_core->event_wq = create_singlethread_workqueue("nesewq");
2859 cm_core->post_event = nes_cm_post_event;
2860 nes_debug(NES_DBG_CM, "Enable QUEUE DISCONNECTS\n");
2861 cm_core->disconn_wq = create_singlethread_workqueue("nesdwq");
2862
2863 print_core(cm_core);
2864 return cm_core;
2865}
2866
2867
2868/**
2869 * mini_cm_dealloc_core - deallocate a top level instance of a cm core
2870 */
1a855fbf 2871static int mini_cm_dealloc_core(struct nes_cm_core *cm_core)
3c2d774c
GS		 2872{
2873 nes_debug(NES_DBG_CM, "De-Alloc CM Core (%p)\n", cm_core);
2874
2875 if (!cm_core)
2876 return -EINVAL;
2877
2878 barrier();
2879
615eb715 2880 if (timer_pending(&cm_core->tcp_timer))
3c2d774c 2881 del_timer(&cm_core->tcp_timer);
3c2d774c
GS		 2882
2883 destroy_workqueue(cm_core->event_wq);
2884 destroy_workqueue(cm_core->disconn_wq);
2885 nes_debug(NES_DBG_CM, "\n");
2886 kfree(cm_core);
2887
2888 return 0;
2889}
2890
2891
2892/**
2893 * mini_cm_get
2894 */
1a855fbf 2895static int mini_cm_get(struct nes_cm_core *cm_core)
3c2d774c
GS		 2896{
2897 return cm_core->state;
2898}
2899
2900
2901/**
2902 * mini_cm_set
2903 */
1a855fbf 2904static int mini_cm_set(struct nes_cm_core *cm_core, u32 type, u32 value)
3c2d774c
GS		 2905{
2906 int ret = 0;
2907
2908 switch (type) {
9d5ab133
FL		 2909 case NES_CM_SET_PKT_SIZE:
2910 cm_core->mtu = value;
2911 break;
2912 case NES_CM_SET_FREE_PKT_Q_SIZE:
2913 cm_core->free_tx_pkt_max = value;
2914 break;
2915 default:
2916 /* unknown set option */
2917 ret = -EINVAL;
3c2d774c
GS		 2918 }
2919
2920 return ret;
2921}
2922
2923
2924/**
2925 * nes_cm_init_tsa_conn setup HW; MPA frames must be
2926 * successfully exchanged when this is called
2927 */
2928static int nes_cm_init_tsa_conn(struct nes_qp *nesqp, struct nes_cm_node *cm_node)
2929{
2930 int ret = 0;
2931
2932 if (!nesqp)
2933 return -EINVAL;
2934
2935 nesqp->nesqp_context->misc |= cpu_to_le32(NES_QPCONTEXT_MISC_IPV4 |
615eb715
TN		 2936 NES_QPCONTEXT_MISC_NO_NAGLE | NES_QPCONTEXT_MISC_DO_NOT_FRAG |
2937 NES_QPCONTEXT_MISC_DROS);
3c2d774c
GS		 2938
2939 if (cm_node->tcp_cntxt.snd_wscale || cm_node->tcp_cntxt.rcv_wscale)
2940 nesqp->nesqp_context->misc |= cpu_to_le32(NES_QPCONTEXT_MISC_WSCALE);
2941
2942 nesqp->nesqp_context->misc2 |= cpu_to_le32(64 << NES_QPCONTEXT_MISC2_TTL_SHIFT);
2943
854ace98
FL		 2944 nesqp->nesqp_context->misc2 |= cpu_to_le32(
2945 cm_node->tos << NES_QPCONTEXT_MISC2_TOS_SHIFT);
2946
3c2d774c
GS		 2947 nesqp->nesqp_context->mss |= cpu_to_le32(((u32)cm_node->tcp_cntxt.mss) << 16);
2948
2949 nesqp->nesqp_context->tcp_state_flow_label |= cpu_to_le32(
615eb715 2950 (u32)NES_QPCONTEXT_TCPSTATE_EST << NES_QPCONTEXT_TCPFLOW_TCP_STATE_SHIFT);
3c2d774c
GS		 2951
2952 nesqp->nesqp_context->pd_index_wscale |= cpu_to_le32(
615eb715
TN		 2953 (cm_node->tcp_cntxt.snd_wscale << NES_QPCONTEXT_PDWSCALE_SND_WSCALE_SHIFT) &
2954 NES_QPCONTEXT_PDWSCALE_SND_WSCALE_MASK);
3c2d774c
GS		 2955
2956 nesqp->nesqp_context->pd_index_wscale |= cpu_to_le32(
615eb715
TN		 2957 (cm_node->tcp_cntxt.rcv_wscale << NES_QPCONTEXT_PDWSCALE_RCV_WSCALE_SHIFT) &
2958 NES_QPCONTEXT_PDWSCALE_RCV_WSCALE_MASK);
3c2d774c
GS		 2959
2960 nesqp->nesqp_context->keepalive = cpu_to_le32(0x80);
2961 nesqp->nesqp_context->ts_recent = 0;
2962 nesqp->nesqp_context->ts_age = 0;
2963 nesqp->nesqp_context->snd_nxt = cpu_to_le32(cm_node->tcp_cntxt.loc_seq_num);
2964 nesqp->nesqp_context->snd_wnd = cpu_to_le32(cm_node->tcp_cntxt.snd_wnd);
2965 nesqp->nesqp_context->rcv_nxt = cpu_to_le32(cm_node->tcp_cntxt.rcv_nxt);
2966 nesqp->nesqp_context->rcv_wnd = cpu_to_le32(cm_node->tcp_cntxt.rcv_wnd <<
615eb715 2967 cm_node->tcp_cntxt.rcv_wscale);
3c2d774c
GS		 2968 nesqp->nesqp_context->snd_max = cpu_to_le32(cm_node->tcp_cntxt.loc_seq_num);
2969 nesqp->nesqp_context->snd_una = cpu_to_le32(cm_node->tcp_cntxt.loc_seq_num);
2970 nesqp->nesqp_context->srtt = 0;
2971 nesqp->nesqp_context->rttvar = cpu_to_le32(0x6);
2972 nesqp->nesqp_context->ssthresh = cpu_to_le32(0x3FFFC000);
615eb715 2973 nesqp->nesqp_context->cwnd = cpu_to_le32(2 * cm_node->tcp_cntxt.mss);
3c2d774c
GS		 2974 nesqp->nesqp_context->snd_wl1 = cpu_to_le32(cm_node->tcp_cntxt.rcv_nxt);
2975 nesqp->nesqp_context->snd_wl2 = cpu_to_le32(cm_node->tcp_cntxt.loc_seq_num);
2976 nesqp->nesqp_context->max_snd_wnd = cpu_to_le32(cm_node->tcp_cntxt.max_snd_wnd);
2977
2978 nes_debug(NES_DBG_CM, "QP%u: rcv_nxt = 0x%08X, snd_nxt = 0x%08X,"
615eb715
TN		 2979 " Setting MSS to %u, PDWscale = 0x%08X, rcv_wnd = %u, context misc = 0x%08X.\n",
2980 nesqp->hwqp.qp_id, le32_to_cpu(nesqp->nesqp_context->rcv_nxt),
2981 le32_to_cpu(nesqp->nesqp_context->snd_nxt),
2982 cm_node->tcp_cntxt.mss, le32_to_cpu(nesqp->nesqp_context->pd_index_wscale),
2983 le32_to_cpu(nesqp->nesqp_context->rcv_wnd),
2984 le32_to_cpu(nesqp->nesqp_context->misc));
3c2d774c
GS		 2985 nes_debug(NES_DBG_CM, " snd_wnd = 0x%08X.\n", le32_to_cpu(nesqp->nesqp_context->snd_wnd));
2986 nes_debug(NES_DBG_CM, " snd_cwnd = 0x%08X.\n", le32_to_cpu(nesqp->nesqp_context->cwnd));
2987 nes_debug(NES_DBG_CM, " max_swnd = 0x%08X.\n", le32_to_cpu(nesqp->nesqp_context->max_snd_wnd));
2988
2989 nes_debug(NES_DBG_CM, "Change cm_node state to TSA\n");
2990 cm_node->state = NES_CM_STATE_TSA;
2991
2992 return ret;
2993}
2994
2995
2996/**
2997 * nes_cm_disconn
2998 */
2999int nes_cm_disconn(struct nes_qp *nesqp)
3000{
873fcdd4 3001 struct disconn_work *work;
3c2d774c 3002
873fcdd4
DW		 3003 work = kzalloc(sizeof *work, GFP_ATOMIC);
3004 if (!work)
615eb715 3005 return -ENOMEM; /* Timer will clean up */
3c2d774c 3006
873fcdd4
DW		 3007 nes_add_ref(&nesqp->ibqp);
3008 work->nesqp = nesqp;
3009 INIT_WORK(&work->work, nes_disconnect_worker);
3010 queue_work(g_cm_core->disconn_wq, &work->work);
3c2d774c
GS		 3011 return 0;
3012}
3013
3014
3015/**
3016 * nes_disconnect_worker
3017 */
1a855fbf 3018static void nes_disconnect_worker(struct work_struct *work)
3c2d774c 3019{
873fcdd4
DW		 3020 struct disconn_work *dwork = container_of(work, struct disconn_work, work);
3021 struct nes_qp *nesqp = dwork->nesqp;
3c2d774c 3022
873fcdd4 3023 kfree(dwork);
3c2d774c 3024 nes_debug(NES_DBG_CM, "processing AEQE id 0x%04X for QP%u.\n",
615eb715 3025 nesqp->last_aeq, nesqp->hwqp.qp_id);
3c2d774c 3026 nes_cm_disconn_true(nesqp);
c4c3f279 3027 nes_rem_ref(&nesqp->ibqp);
3c2d774c
GS		 3028}
3029
3030
3031/**
3032 * nes_cm_disconn_true
3033 */
1a855fbf 3034static int nes_cm_disconn_true(struct nes_qp *nesqp)
3c2d774c
GS		 3035{
3036 unsigned long flags;
3037 int ret = 0;
3038 struct iw_cm_id *cm_id;
3039 struct iw_cm_event cm_event;
3040 struct nes_vnic *nesvnic;
3041 u16 last_ae;
3042 u8 original_hw_tcp_state;
3043 u8 original_ibqp_state;
d0c49bf3 3044 int disconn_status = 0;
b29a4fc4
DW		 3045 int issue_disconn = 0;
3046 int issue_close = 0;
3047 int issue_flush = 0;
3048 u32 flush_q = NES_CQP_FLUSH_RQ;
3049 struct ib_event ibevent;
3c2d774c
GS		 3050
3051 if (!nesqp) {
3052 nes_debug(NES_DBG_CM, "disconnect_worker nesqp is NULL\n");
3053 return -1;
3054 }
3055
3056 spin_lock_irqsave(&nesqp->lock, flags);
3057 cm_id = nesqp->cm_id;
3058 /* make sure we havent already closed this connection */
3059 if (!cm_id) {
3060 nes_debug(NES_DBG_CM, "QP%u disconnect_worker cmid is NULL\n",
615eb715 3061 nesqp->hwqp.qp_id);
3c2d774c 3062 spin_unlock_irqrestore(&nesqp->lock, flags);
3c2d774c
GS		 3063 return -1;
3064 }
3065
3066 nesvnic = to_nesvnic(nesqp->ibqp.device);
3067 nes_debug(NES_DBG_CM, "Disconnecting QP%u\n", nesqp->hwqp.qp_id);
3068
3069 original_hw_tcp_state = nesqp->hw_tcp_state;
615eb715 3070 original_ibqp_state = nesqp->ibqp_state;
3c2d774c
GS		 3071 last_ae = nesqp->last_aeq;
3072
b29a4fc4
DW		 3073 if (nesqp->term_flags) {
3074 issue_disconn = 1;
3075 issue_close = 1;
3076 nesqp->cm_id = NULL;
196f40c8 3077 del_timer(&nesqp->terminate_timer);
b29a4fc4
DW		 3078 if (nesqp->flush_issued == 0) {
3079 nesqp->flush_issued = 1;
3080 issue_flush = 1;
3081 }
3082 } else if ((original_hw_tcp_state == NES_AEQE_TCP_STATE_CLOSE_WAIT) ||
3083 ((original_ibqp_state == IB_QPS_RTS) &&
3084 (last_ae == NES_AEQE_AEID_LLP_CONNECTION_RESET))) {
3085 issue_disconn = 1;
3086 if (last_ae == NES_AEQE_AEID_LLP_CONNECTION_RESET)
d0c49bf3 3087 disconn_status = -ECONNRESET;
b29a4fc4
DW		 3088 }
3089
3090 if (((original_hw_tcp_state == NES_AEQE_TCP_STATE_CLOSED) ||
3091 (original_hw_tcp_state == NES_AEQE_TCP_STATE_TIME_WAIT) ||
3092 (last_ae == NES_AEQE_AEID_RDMAP_ROE_BAD_LLP_CLOSE) ||
3093 (last_ae == NES_AEQE_AEID_LLP_CONNECTION_RESET))) {
3094 issue_close = 1;
3095 nesqp->cm_id = NULL;
3096 if (nesqp->flush_issued == 0) {
3097 nesqp->flush_issued = 1;
3098 issue_flush = 1;
3099 }
3100 }
3c2d774c 3101
b29a4fc4
DW		 3102 spin_unlock_irqrestore(&nesqp->lock, flags);
3103
3104 if ((issue_flush) && (nesqp->destroyed == 0)) {
3105 /* Flush the queue(s) */
3106 if (nesqp->hw_iwarp_state >= NES_AEQE_IWARP_STATE_TERMINATE)
3107 flush_q |= NES_CQP_FLUSH_SQ;
3108 flush_wqes(nesvnic->nesdev, nesqp, flush_q, 1);
3109
3110 if (nesqp->term_flags) {
3111 ibevent.device = nesqp->ibqp.device;
3112 ibevent.event = nesqp->terminate_eventtype;
3113 ibevent.element.qp = &nesqp->ibqp;
784d135f
TN		 3114 if (nesqp->ibqp.event_handler)
3115 nesqp->ibqp.event_handler(&ibevent, nesqp->ibqp.qp_context);
b29a4fc4
DW		 3116 }
3117 }
3c2d774c 3118
b29a4fc4
DW		 3119 if ((cm_id) && (cm_id->event_handler)) {
3120 if (issue_disconn) {
3c2d774c
GS		 3121 atomic_inc(&cm_disconnects);
3122 cm_event.event = IW_CM_EVENT_DISCONNECT;
b29a4fc4 3123 cm_event.status = disconn_status;
3c2d774c
GS		 3124 cm_event.local_addr = cm_id->local_addr;
3125 cm_event.remote_addr = cm_id->remote_addr;
3126 cm_event.private_data = NULL;
3127 cm_event.private_data_len = 0;
3128
6492cdf3 3129 nes_debug(NES_DBG_CM, "Generating a CM Disconnect Event"
615eb715
TN		 3130 " for QP%u, SQ Head = %u, SQ Tail = %u. "
3131 "cm_id = %p, refcount = %u.\n",
3132 nesqp->hwqp.qp_id, nesqp->hwqp.sq_head,
3133 nesqp->hwqp.sq_tail, cm_id,
3134 atomic_read(&nesqp->refcount));
3c2d774c 3135
3c2d774c
GS		 3136 ret = cm_id->event_handler(cm_id, &cm_event);
3137 if (ret)
6492cdf3 3138 nes_debug(NES_DBG_CM, "OFA CM event_handler "
615eb715 3139 "returned, ret=%d\n", ret);
3c2d774c
GS		 3140 }
3141
b29a4fc4 3142 if (issue_close) {
3c2d774c 3143 atomic_inc(&cm_closes);
3c2d774c
GS		 3144 nes_disconnect(nesqp, 1);
3145
3146 cm_id->provider_data = nesqp;
3147 /* Send up the close complete event */
3148 cm_event.event = IW_CM_EVENT_CLOSE;
d0c49bf3 3149 cm_event.status = 0;
3c2d774c
GS		 3150 cm_event.provider_data = cm_id->provider_data;
3151 cm_event.local_addr = cm_id->local_addr;
3152 cm_event.remote_addr = cm_id->remote_addr;
3153 cm_event.private_data = NULL;
3154 cm_event.private_data_len = 0;
3155
3156 ret = cm_id->event_handler(cm_id, &cm_event);
615eb715 3157 if (ret)
3c2d774c 3158 nes_debug(NES_DBG_CM, "OFA CM event_handler returned, ret=%d\n", ret);
3c2d774c
GS		 3159
3160 cm_id->rem_ref(cm_id);
3c2d774c 3161 }
3c2d774c 3162 }
3c2d774c
GS		 3163
3164 return 0;
3165}
3166
3167
3168/**
3169 * nes_disconnect
3170 */
1a855fbf 3171static int nes_disconnect(struct nes_qp *nesqp, int abrupt)
3c2d774c
GS		 3172{
3173 int ret = 0;
3174 struct nes_vnic *nesvnic;
3175 struct nes_device *nesdev;
c12e56ef 3176 struct nes_ib_device *nesibdev;
3c2d774c
GS		 3177
3178 nesvnic = to_nesvnic(nesqp->ibqp.device);
3179 if (!nesvnic)
3180 return -EINVAL;
3181
3182 nesdev = nesvnic->nesdev;
c12e56ef 3183 nesibdev = nesvnic->nesibdev;
3c2d774c
GS		 3184
3185 nes_debug(NES_DBG_CM, "netdev refcnt = %u.\n",
29b4433d 3186 netdev_refcnt_read(nesvnic->netdev));
3c2d774c
GS		 3187
3188 if (nesqp->active_conn) {
3189
3190 /* indicate this connection is NOT active */
3191 nesqp->active_conn = 0;
3192 } else {
3193 /* Need to free the Last Streaming Mode Message */
3194 if (nesqp->ietf_frame) {
c12e56ef
FL		 3195 if (nesqp->lsmm_mr)
3196 nesibdev->ibdev.dereg_mr(nesqp->lsmm_mr);
3c2d774c 3197 pci_free_consistent(nesdev->pcidev,
615eb715
TN		 3198 nesqp->private_data_len + nesqp->ietf_frame_size,
3199 nesqp->ietf_frame, nesqp->ietf_frame_pbase);
3c2d774c
GS		 3200 }
3201 }
3202
3203 /* close the CM node down if it is still active */
3204 if (nesqp->cm_node) {
3205 nes_debug(NES_DBG_CM, "Call close API\n");
3206
3207 g_cm_core->api->close(g_cm_core, nesqp->cm_node);
3c2d774c
GS		 3208 }
3209
3210 return ret;
3211}
3212
3213
3214/**
3215 * nes_accept
3216 */
3217int nes_accept(struct iw_cm_id *cm_id, struct iw_cm_conn_param *conn_param)
3218{
3219 u64 u64temp;
3220 struct ib_qp *ibqp;
3221 struct nes_qp *nesqp;
3222 struct nes_vnic *nesvnic;
3223 struct nes_device *nesdev;
3224 struct nes_cm_node *cm_node;
3225 struct nes_adapter *adapter;
3226 struct ib_qp_attr attr;
3227 struct iw_cm_event cm_event;
3228 struct nes_hw_qp_wqe *wqe;
3229 struct nes_v4_quad nes_quad;
30da7cff 3230 u32 crc_value;
3c2d774c 3231 int ret;
183ecfa3 3232 int passive_state;
c12e56ef
FL		 3233 struct nes_ib_device *nesibdev;
3234 struct ib_mr *ibmr = NULL;
c12e56ef 3235 struct nes_pd *nespd;
7a5efb62 3236 u64 tagged_offset;
615eb715
TN		 3237 u8 mpa_frame_offset = 0;
3238 struct ietf_mpa_v2 *mpa_v2_frame;
3239 u8 start_addr = 0;
3240 u8 *start_ptr = &start_addr;
3241 u8 **start_buff = &start_ptr;
3242 u16 buff_len = 0;
24d44a39
SW		 3243 struct sockaddr_in *laddr = (struct sockaddr_in *)&cm_id->local_addr;
3244 struct sockaddr_in *raddr = (struct sockaddr_in *)&cm_id->remote_addr;
c12e56ef 3245
3c2d774c
GS		 3246 ibqp = nes_get_qp(cm_id->device, conn_param->qpn);
3247 if (!ibqp)
3248 return -EINVAL;
3249
3250 /* get all our handles */
3251 nesqp = to_nesqp(ibqp);
3252 nesvnic = to_nesvnic(nesqp->ibqp.device);
3253 nesdev = nesvnic->nesdev;
3254 adapter = nesdev->nesadapter;
3255
3c2d774c 3256 cm_node = (struct nes_cm_node *)cm_id->provider_data;
6492cdf3
FL		 3257 nes_debug(NES_DBG_CM, "nes_accept: cm_node= %p nesvnic=%p, netdev=%p,"
3258 "%s\n", cm_node, nesvnic, nesvnic->netdev,
3259 nesvnic->netdev->name);
3c2d774c 3260
c5a7d489
FL		 3261 if (NES_CM_STATE_LISTENER_DESTROYED == cm_node->state) {
3262 if (cm_node->loopbackpartner)
3263 rem_ref_cm_node(cm_node->cm_core, cm_node->loopbackpartner);
3264 rem_ref_cm_node(cm_node->cm_core, cm_node);
3265 return -EINVAL;
3266 }
3267
dae58728
FL		 3268 passive_state = atomic_add_return(1, &cm_node->passive_state);
3269 if (passive_state == NES_SEND_RESET_EVENT) {
3270 rem_ref_cm_node(cm_node->cm_core, cm_node);
3271 return -ECONNRESET;
3272 }
3c2d774c
GS		 3273 /* associate the node with the QP */
3274 nesqp->cm_node = (void *)cm_node;
6492cdf3 3275 cm_node->nesqp = nesqp;
3c2d774c 3276
4ac79a70 3277
6492cdf3
FL		 3278 nes_debug(NES_DBG_CM, "QP%u, cm_node=%p, jiffies = %lu listener = %p\n",
3279 nesqp->hwqp.qp_id, cm_node, jiffies, cm_node->listener);
3c2d774c
GS		 3280 atomic_inc(&cm_accepts);
3281
3282 nes_debug(NES_DBG_CM, "netdev refcnt = %u.\n",
29b4433d 3283 netdev_refcnt_read(nesvnic->netdev));
3c2d774c 3284
615eb715 3285 nesqp->ietf_frame_size = sizeof(struct ietf_mpa_v2);
6492cdf3
FL		 3286 /* allocate the ietf frame and space for private data */
3287 nesqp->ietf_frame = pci_alloc_consistent(nesdev->pcidev,
615eb715
TN		 3288 nesqp->ietf_frame_size + conn_param->private_data_len,
3289 &nesqp->ietf_frame_pbase);
3c2d774c 3290
6492cdf3 3291 if (!nesqp->ietf_frame) {
615eb715 3292 nes_debug(NES_DBG_CM, "Unable to allocate memory for private data\n");
6492cdf3
FL		 3293 return -ENOMEM;
3294 }
615eb715 3295 mpa_v2_frame = (struct ietf_mpa_v2 *)nesqp->ietf_frame;
3c2d774c 3296
615eb715
TN		 3297 if (cm_node->mpa_frame_rev == IETF_MPA_V1)
3298 mpa_frame_offset = 4;
3c2d774c 3299
4ac79a70
TN		 3300 if (cm_node->mpa_frame_rev == IETF_MPA_V1 ||
3301 cm_node->mpav2_ird_ord == IETF_NO_IRD_ORD) {
3302 record_ird_ord(cm_node, (u16)conn_param->ird, (u16)conn_param->ord);
3303 }
3304
615eb715
TN		 3305 memcpy(mpa_v2_frame->priv_data, conn_param->private_data,
3306 conn_param->private_data_len);
3c2d774c 3307
615eb715
TN		 3308 cm_build_mpa_frame(cm_node, start_buff, &buff_len, nesqp->ietf_frame, MPA_KEY_REPLY);
3309 nesqp->private_data_len = conn_param->private_data_len;
3c2d774c 3310
6492cdf3
FL		 3311 /* setup our first outgoing iWarp send WQE (the IETF frame response) */
3312 wqe = &nesqp->hwqp.sq_vbase[0];
3313
24d44a39 3314 if (raddr->sin_addr.s_addr != laddr->sin_addr.s_addr) {
6492cdf3 3315 u64temp = (unsigned long)nesqp;
c12e56ef
FL		 3316 nesibdev = nesvnic->nesibdev;
3317 nespd = nesqp->nespd;
615eb715 3318 tagged_offset = (u64)(unsigned long)*start_buff;
f64054d8
CH		 3319 ibmr = nes_reg_phys_mr(&nespd->ibpd,
3320 nesqp->ietf_frame_pbase + mpa_frame_offset,
3321 buff_len, IB_ACCESS_LOCAL_WRITE,
3322 &tagged_offset);
c12e56ef
FL		 3323 if (!ibmr) {
3324 nes_debug(NES_DBG_CM, "Unable to register memory region"
615eb715
TN		 3325 "for lSMM for cm_node = %p \n",
3326 cm_node);
9256b251 3327 pci_free_consistent(nesdev->pcidev,
615eb715
TN		 3328 nesqp->private_data_len + nesqp->ietf_frame_size,
3329 nesqp->ietf_frame, nesqp->ietf_frame_pbase);
c12e56ef
FL		 3330 return -ENOMEM;
3331 }
3332
3333 ibmr->pd = &nespd->ibpd;
3334 ibmr->device = nespd->ibpd.device;
3335 nesqp->lsmm_mr = ibmr;
3336
615eb715 3337 u64temp |= NES_SW_CONTEXT_ALIGN >> 1;
6492cdf3 3338 set_wqe_64bit_value(wqe->wqe_words,
615eb715
TN		 3339 NES_IWARP_SQ_WQE_COMP_CTX_LOW_IDX,
3340 u64temp);
6492cdf3
FL		 3341 wqe->wqe_words[NES_IWARP_SQ_WQE_MISC_IDX] =
3342 cpu_to_le32(NES_IWARP_SQ_WQE_STREAMING |
615eb715 3343 NES_IWARP_SQ_WQE_WRPDU);
6492cdf3 3344 wqe->wqe_words[NES_IWARP_SQ_WQE_TOTAL_PAYLOAD_IDX] =
615eb715 3345 cpu_to_le32(buff_len);
c12e56ef 3346 set_wqe_64bit_value(wqe->wqe_words,
615eb715
TN		 3347 NES_IWARP_SQ_WQE_FRAG0_LOW_IDX,
3348 (u64)(unsigned long)(*start_buff));
6492cdf3 3349 wqe->wqe_words[NES_IWARP_SQ_WQE_LENGTH0_IDX] =
615eb715 3350 cpu_to_le32(buff_len);
c12e56ef 3351 wqe->wqe_words[NES_IWARP_SQ_WQE_STAG0_IDX] = ibmr->lkey;
d2fa9b26
FL		 3352 if (nesqp->sq_kmapped) {
3353 nesqp->sq_kmapped = 0;
3354 kunmap(nesqp->page);
3355 }
6492cdf3
FL		 3356
3357 nesqp->nesqp_context->ird_ord_sizes |=
3358 cpu_to_le32(NES_QPCONTEXT_ORDIRD_LSMM_PRESENT |
615eb715 3359 NES_QPCONTEXT_ORDIRD_WRPDU);
6492cdf3
FL		 3360 } else {
3361 nesqp->nesqp_context->ird_ord_sizes |=
9d5ab133 3362 cpu_to_le32(NES_QPCONTEXT_ORDIRD_WRPDU);
6492cdf3
FL		 3363 }
3364 nesqp->skip_lsmm = 1;
3c2d774c 3365
3c2d774c
GS		 3366 /* Cache the cm_id in the qp */
3367 nesqp->cm_id = cm_id;
3368 cm_node->cm_id = cm_id;
3369
3370 /* nesqp->cm_node = (void *)cm_id->provider_data; */
3371 cm_id->provider_data = nesqp;
615eb715 3372 nesqp->active_conn = 0;
3c2d774c 3373
6492cdf3
FL		 3374 if (cm_node->state == NES_CM_STATE_TSA)
3375 nes_debug(NES_DBG_CM, "Already state = TSA for cm_node=%p\n",
615eb715 3376 cm_node);
6492cdf3 3377
3c2d774c
GS		 3378 nes_cm_init_tsa_conn(nesqp, cm_node);
3379
5647263c
TN		 3380 nesqp->nesqp_context->tcpPorts[0] =
3381 cpu_to_le16(cm_node->mapped_loc_port);
3382 nesqp->nesqp_context->tcpPorts[1] =
3383 cpu_to_le16(cm_node->mapped_rem_port);
6492cdf3 3384
5647263c 3385 nesqp->nesqp_context->ip0 = cpu_to_le32(cm_node->mapped_rem_addr);
3c2d774c
GS		 3386
3387 nesqp->nesqp_context->misc2 |= cpu_to_le32(
615eb715
TN		 3388 (u32)PCI_FUNC(nesdev->pcidev->devfn) <<
3389 NES_QPCONTEXT_MISC2_SRC_IP_SHIFT);
3c2d774c 3390
6492cdf3
FL		 3391 nesqp->nesqp_context->arp_index_vlan |=
3392 cpu_to_le32(nes_arp_table(nesdev,
615eb715
TN		 3393 le32_to_cpu(nesqp->nesqp_context->ip0), NULL,
3394 NES_ARP_RESOLVE) << 16);
3c2d774c
GS		 3395
3396 nesqp->nesqp_context->ts_val_delta = cpu_to_le32(
6492cdf3 3397 jiffies - nes_read_indexed(nesdev, NES_IDX_TCP_NOW));
3c2d774c
GS		 3398
3399 nesqp->nesqp_context->ird_index = cpu_to_le32(nesqp->hwqp.qp_id);
3400
3401 nesqp->nesqp_context->ird_ord_sizes |= cpu_to_le32(
6492cdf3
FL		 3402 ((u32)1 << NES_QPCONTEXT_ORDIRD_IWARP_MODE_SHIFT));
3403 nesqp->nesqp_context->ird_ord_sizes |=
4ac79a70 3404 cpu_to_le32((u32)cm_node->ord_size);
3c2d774c
GS		 3405
3406 memset(&nes_quad, 0, sizeof(nes_quad));
6492cdf3
FL		 3407 nes_quad.DstIpAdrIndex =
3408 cpu_to_le32((u32)PCI_FUNC(nesdev->pcidev->devfn) << 24);
5647263c
TN		 3409 nes_quad.SrcIpadr = htonl(cm_node->mapped_rem_addr);
3410 nes_quad.TcpPorts[0] = htons(cm_node->mapped_rem_port);
3411 nes_quad.TcpPorts[1] = htons(cm_node->mapped_loc_port);
3c2d774c
GS		 3412
3413 /* Produce hash key */
30da7cff
FL		 3414 crc_value = get_crc_value(&nes_quad);
3415 nesqp->hte_index = cpu_to_be32(crc_value ^ 0xffffffff);
3c2d774c 3416 nes_debug(NES_DBG_CM, "HTE Index = 0x%08X, CRC = 0x%08X\n",
615eb715 3417 nesqp->hte_index, nesqp->hte_index & adapter->hte_index_mask);
3c2d774c
GS		 3418
3419 nesqp->hte_index &= adapter->hte_index_mask;
3420 nesqp->nesqp_context->hte_index = cpu_to_le32(nesqp->hte_index);
3421
3422 cm_node->cm_core->api->accelerated(cm_node->cm_core, cm_node);
3423
6492cdf3 3424 nes_debug(NES_DBG_CM, "QP%u, Destination IP = 0x%08X:0x%04X, local = "
615eb715
TN		 3425 "0x%08X:0x%04X, rcv_nxt=0x%08X, snd_nxt=0x%08X, mpa + "
3426 "private data length=%u.\n", nesqp->hwqp.qp_id,
24d44a39
SW		 3427 ntohl(raddr->sin_addr.s_addr), ntohs(raddr->sin_port),
3428 ntohl(laddr->sin_addr.s_addr), ntohs(laddr->sin_port),
615eb715
TN		 3429 le32_to_cpu(nesqp->nesqp_context->rcv_nxt),
3430 le32_to_cpu(nesqp->nesqp_context->snd_nxt),
3431 buff_len);
3c2d774c 3432
73ac36ea 3433 /* notify OF layer that accept event was successful */
3c2d774c 3434 cm_id->add_ref(cm_id);
9256b251 3435 nes_add_ref(&nesqp->ibqp);
3c2d774c
GS		 3436
3437 cm_event.event = IW_CM_EVENT_ESTABLISHED;
d0c49bf3 3438 cm_event.status = 0;
3c2d774c
GS		 3439 cm_event.provider_data = (void *)nesqp;
3440 cm_event.local_addr = cm_id->local_addr;
3441 cm_event.remote_addr = cm_id->remote_addr;
3442 cm_event.private_data = NULL;
3443 cm_event.private_data_len = 0;
4ac79a70
TN		 3444 cm_event.ird = cm_node->ird_size;
3445 cm_event.ord = cm_node->ord_size;
3446
3c2d774c 3447 ret = cm_id->event_handler(cm_id, &cm_event);
183ecfa3
FL		 3448 attr.qp_state = IB_QPS_RTS;
3449 nes_modify_qp(&nesqp->ibqp, &attr, IB_QP_STATE, NULL);
3c2d774c 3450 if (cm_node->loopbackpartner) {
6492cdf3
FL		 3451 cm_node->loopbackpartner->mpa_frame_size =
3452 nesqp->private_data_len;
3c2d774c 3453 /* copy entire MPA frame to our cm_node's frame */
6492cdf3 3454 memcpy(cm_node->loopbackpartner->mpa_frame_buf,
615eb715 3455 conn_param->private_data, conn_param->private_data_len);
3c2d774c
GS		 3456 create_event(cm_node->loopbackpartner, NES_CM_EVENT_CONNECTED);
3457 }
3458 if (ret)
6492cdf3 3459 printk(KERN_ERR "%s[%u] OFA CM event_handler returned, "
615eb715 3460 "ret=%d\n", __func__, __LINE__, ret);
3c2d774c
GS		 3461
3462 return 0;
3463}
3464
3465
3466/**
3467 * nes_reject
3468 */
3469int nes_reject(struct iw_cm_id *cm_id, const void *pdata, u8 pdata_len)
3470{
3471 struct nes_cm_node *cm_node;
9d5ab133 3472 struct nes_cm_node *loopback;
3c2d774c 3473 struct nes_cm_core *cm_core;
615eb715 3474 u8 *start_buff;
3c2d774c
GS		 3475
3476 atomic_inc(&cm_rejects);
615eb715 3477 cm_node = (struct nes_cm_node *)cm_id->provider_data;
9d5ab133 3478 loopback = cm_node->loopbackpartner;
3c2d774c 3479 cm_core = cm_node->cm_core;
9d5ab133 3480 cm_node->cm_id = cm_id;
3c2d774c 3481
615eb715 3482 if (pdata_len + sizeof(struct ietf_mpa_v2) > MAX_CM_BUFFER)
9d5ab133
FL		 3483 return -EINVAL;
3484
9d5ab133
FL		 3485 if (loopback) {
3486 memcpy(&loopback->mpa_frame.priv_data, pdata, pdata_len);
3487 loopback->mpa_frame.priv_data_len = pdata_len;
615eb715 3488 loopback->mpa_frame_size = pdata_len;
9d5ab133 3489 } else {
615eb715
TN		 3490 start_buff = &cm_node->mpa_frame_buf[0] + sizeof(struct ietf_mpa_v2);
3491 cm_node->mpa_frame_size = pdata_len;
3492 memcpy(start_buff, pdata, pdata_len);
9d5ab133 3493 }
615eb715 3494 return cm_core->api->reject(cm_core, cm_node);
3c2d774c
GS		 3495}
3496
3497
3498/**
3499 * nes_connect
3500 * setup and launch cm connect node
3501 */
3502int nes_connect(struct iw_cm_id *cm_id, struct iw_cm_conn_param *conn_param)
3503{
3504 struct ib_qp *ibqp;
3505 struct nes_qp *nesqp;
3506 struct nes_vnic *nesvnic;
3507 struct nes_device *nesdev;
3508 struct nes_cm_node *cm_node;
3509 struct nes_cm_info cm_info;
53094c38 3510 int apbvt_set = 0;
24d44a39
SW		 3511 struct sockaddr_in *laddr = (struct sockaddr_in *)&cm_id->local_addr;
3512 struct sockaddr_in *raddr = (struct sockaddr_in *)&cm_id->remote_addr;
5647263c
TN		 3513 struct iwpm_dev_data pm_reg_msg;
3514 struct iwpm_sa_data pm_msg;
3515 int iwpm_err = 0;
3c2d774c 3516
24d44a39
SW		 3517 if (cm_id->remote_addr.ss_family != AF_INET)
3518 return -ENOSYS;
3c2d774c
GS		 3519 ibqp = nes_get_qp(cm_id->device, conn_param->qpn);
3520 if (!ibqp)
3521 return -EINVAL;
3522 nesqp = to_nesqp(ibqp);
3523 if (!nesqp)
3524 return -EINVAL;
3525 nesvnic = to_nesvnic(nesqp->ibqp.device);
3526 if (!nesvnic)
3527 return -EINVAL;
615eb715 3528 nesdev = nesvnic->nesdev;
3c2d774c
GS		 3529 if (!nesdev)
3530 return -EINVAL;
3531
24d44a39 3532 if (!laddr->sin_port || !raddr->sin_port)
c5a7d489
FL		 3533 return -EINVAL;
3534
6492cdf3 3535 nes_debug(NES_DBG_CM, "QP%u, current IP = 0x%08X, Destination IP = "
615eb715 3536 "0x%08X:0x%04X, local = 0x%08X:0x%04X.\n", nesqp->hwqp.qp_id,
24d44a39
SW		 3537 ntohl(nesvnic->local_ipaddr), ntohl(raddr->sin_addr.s_addr),
3538 ntohs(raddr->sin_port), ntohl(laddr->sin_addr.s_addr),
3539 ntohs(laddr->sin_port));
3c2d774c 3540
6492cdf3 3541 atomic_inc(&cm_connects);
3c2d774c
GS		 3542 nesqp->active_conn = 1;
3543
3c2d774c
GS		 3544 /* cache the cm_id in the qp */
3545 nesqp->cm_id = cm_id;
3c2d774c 3546 cm_id->provider_data = nesqp;
3c2d774c 3547 nesqp->private_data_len = conn_param->private_data_len;
d3e51328 3548
3c2d774c 3549 nes_debug(NES_DBG_CM, "requested ord = 0x%08X.\n", (u32)conn_param->ord);
6492cdf3 3550 nes_debug(NES_DBG_CM, "mpa private data len =%u\n",
615eb715 3551 conn_param->private_data_len);
3c2d774c 3552
5647263c
TN		 3553 /* set up the connection params for the node */
3554 cm_info.loc_addr = ntohl(laddr->sin_addr.s_addr);
3555 cm_info.loc_port = ntohs(laddr->sin_port);
3556 cm_info.rem_addr = ntohl(raddr->sin_addr.s_addr);
3557 cm_info.rem_port = ntohs(raddr->sin_port);
3558 cm_info.cm_id = cm_id;
3559 cm_info.conn_type = NES_CM_IWARP_CONN_TYPE;
3560
3561 /* No port mapper available, go with the specified peer information */
3562 cm_info.mapped_loc_addr = cm_info.loc_addr;
3563 cm_info.mapped_loc_port = cm_info.loc_port;
3564 cm_info.mapped_rem_addr = cm_info.rem_addr;
3565 cm_info.mapped_rem_port = cm_info.rem_port;
3566
3567 nes_form_reg_msg(nesvnic, &pm_reg_msg);
3568 iwpm_err = iwpm_register_pid(&pm_reg_msg, RDMA_NL_NES);
3569 if (iwpm_err) {
3570 nes_debug(NES_DBG_NLMSG,
3571 "Port Mapper reg pid fail (err = %d).\n", iwpm_err);
3572 }
3573 if (iwpm_valid_pid() && !iwpm_err) {
3574 nes_form_pm_msg(&cm_info, &pm_msg);
3575 iwpm_err = iwpm_add_and_query_mapping(&pm_msg, RDMA_NL_NES);
3576 if (iwpm_err)
3577 nes_debug(NES_DBG_NLMSG,
3578 "Port Mapper query fail (err = %d).\n", iwpm_err);
3579 else
3580 nes_record_pm_msg(&cm_info, &pm_msg);
3581 }
3582
24d44a39 3583 if (laddr->sin_addr.s_addr != raddr->sin_addr.s_addr) {
5647263c
TN		 3584 nes_manage_apbvt(nesvnic, cm_info.mapped_loc_port,
3585 PCI_FUNC(nesdev->pcidev->devfn), NES_MANAGE_APBVT_ADD);
53094c38
FL		 3586 apbvt_set = 1;
3587 }
3c2d774c 3588
5647263c
TN		 3589 if (nes_create_mapinfo(&cm_info))
3590 return -ENOMEM;
3c2d774c
GS		 3591
3592 cm_id->add_ref(cm_id);
3c2d774c
GS		 3593
3594 /* create a connect CM node connection */
6492cdf3 3595 cm_node = g_cm_core->api->connect(g_cm_core, nesvnic,
615eb715
TN		 3596 conn_param->private_data_len, (void *)conn_param->private_data,
3597 &cm_info);
3c2d774c 3598 if (!cm_node) {
53094c38 3599 if (apbvt_set)
5647263c 3600 nes_manage_apbvt(nesvnic, cm_info.mapped_loc_port,
615eb715
TN		 3601 PCI_FUNC(nesdev->pcidev->devfn),
3602 NES_MANAGE_APBVT_DEL);
6492cdf3 3603
5647263c
TN		 3604 nes_debug(NES_DBG_NLMSG, "Delete mapped_loc_port = %04X\n",
3605 cm_info.mapped_loc_port);
3606 nes_remove_mapinfo(cm_info.loc_addr, cm_info.loc_port,
3607 cm_info.mapped_loc_addr, cm_info.mapped_loc_port);
3c2d774c
GS		 3608 cm_id->rem_ref(cm_id);
3609 return -ENOMEM;
3610 }
3611
4ac79a70
TN		 3612 record_ird_ord(cm_node, (u16)conn_param->ird, (u16)conn_param->ord);
3613 if (cm_node->send_rdma0_op == SEND_RDMA_READ_ZERO &&
3614 cm_node->ord_size == 0)
3615 cm_node->ord_size = 1;
3616
53094c38 3617 cm_node->apbvt_set = apbvt_set;
854ace98 3618 cm_node->tos = cm_id->tos;
3c2d774c 3619 nesqp->cm_node = cm_node;
6492cdf3 3620 cm_node->nesqp = nesqp;
d7ffd507 3621 nes_add_ref(&nesqp->ibqp);
3c2d774c
GS		 3622
3623 return 0;
3624}
3625
3626
3627/**
3628 * nes_create_listen
3629 */
3630int nes_create_listen(struct iw_cm_id *cm_id, int backlog)
3631{
3632 struct nes_vnic *nesvnic;
3633 struct nes_cm_listener *cm_node;
3634 struct nes_cm_info cm_info;
3c2d774c 3635 int err;
24d44a39 3636 struct sockaddr_in *laddr = (struct sockaddr_in *)&cm_id->local_addr;
3c2d774c 3637
3c2d774c 3638 nes_debug(NES_DBG_CM, "cm_id = %p, local port = 0x%04X.\n",
24d44a39 3639 cm_id, ntohs(laddr->sin_port));
3c2d774c 3640
24d44a39
SW		 3641 if (cm_id->local_addr.ss_family != AF_INET)
3642 return -ENOSYS;
3c2d774c
GS		 3643 nesvnic = to_nesvnic(cm_id->device);
3644 if (!nesvnic)
3645 return -EINVAL;
69d51023 3646
3c2d774c
GS		 3647 nes_debug(NES_DBG_CM, "nesvnic=%p, netdev=%p, %s\n",
3648 nesvnic, nesvnic->netdev, nesvnic->netdev->name);
3649
3650 nes_debug(NES_DBG_CM, "nesvnic->local_ipaddr=0x%08x, sin_addr.s_addr=0x%08x\n",
24d44a39 3651 nesvnic->local_ipaddr, laddr->sin_addr.s_addr);
3c2d774c
GS		 3652
3653 /* setup listen params in our api call struct */
5647263c
TN		 3654 cm_info.loc_addr = ntohl(nesvnic->local_ipaddr);
3655 cm_info.loc_port = ntohs(laddr->sin_port);
3c2d774c
GS		 3656 cm_info.backlog = backlog;
3657 cm_info.cm_id = cm_id;
3658
3659 cm_info.conn_type = NES_CM_IWARP_CONN_TYPE;
3660
5647263c
TN		 3661 /* No port mapper available, go with the specified info */
3662 cm_info.mapped_loc_addr = cm_info.loc_addr;
3663 cm_info.mapped_loc_port = cm_info.loc_port;
3c2d774c
GS		 3664
3665 cm_node = g_cm_core->api->listen(g_cm_core, nesvnic, &cm_info);
3666 if (!cm_node) {
6492cdf3 3667 printk(KERN_ERR "%s[%u] Error returned from listen API call\n",
615eb715 3668 __func__, __LINE__);
3c2d774c
GS		 3669 return -ENOMEM;
3670 }
3671
3672 cm_id->provider_data = cm_node;
854ace98 3673 cm_node->tos = cm_id->tos;
3c2d774c
GS		 3674
3675 if (!cm_node->reused_node) {
5647263c
TN		 3676 if (nes_create_mapinfo(&cm_info))
3677 return -ENOMEM;
3678
3679 err = nes_manage_apbvt(nesvnic, cm_node->mapped_loc_port,
615eb715
TN		 3680 PCI_FUNC(nesvnic->nesdev->pcidev->devfn),
3681 NES_MANAGE_APBVT_ADD);
3c2d774c 3682 if (err) {
6492cdf3 3683 printk(KERN_ERR "nes_manage_apbvt call returned %d.\n",
615eb715 3684 err);
3c2d774c
GS		 3685 g_cm_core->api->stop_listener(g_cm_core, (void *)cm_node);
3686 return err;
3687 }
6e10d2e4 3688 atomic_inc(&cm_listens_created);
3c2d774c
GS		 3689 }
3690
3691 cm_id->add_ref(cm_id);
3692 cm_id->provider_data = (void *)cm_node;
3693
3694
3695 return 0;
3696}
3697
3698
3699/**
3700 * nes_destroy_listen
3701 */
3702int nes_destroy_listen(struct iw_cm_id *cm_id)
3703{
3704 if (cm_id->provider_data)
3705 g_cm_core->api->stop_listener(g_cm_core, cm_id->provider_data);
3706 else
3707 nes_debug(NES_DBG_CM, "cm_id->provider_data was NULL\n");
3708
3709 cm_id->rem_ref(cm_id);
3710
3711 return 0;
3712}
3713
3714
3715/**
3716 * nes_cm_recv
3717 */
3718int nes_cm_recv(struct sk_buff *skb, struct net_device *netdevice)
3719{
4a14f6a7 3720 int rc = 0;
615eb715 3721
3c2d774c 3722 cm_packets_received++;
615eb715 3723 if ((g_cm_core) && (g_cm_core->api))
4a14f6a7 3724 rc = g_cm_core->api->recv_pkt(g_cm_core, netdev_priv(netdevice), skb);
615eb715 3725 else
3c2d774c 3726 nes_debug(NES_DBG_CM, "Unable to process packet for CM,"
615eb715 3727 " cm is not setup properly.\n");
3c2d774c 3728
4a14f6a7 3729 return rc;
3c2d774c
GS		 3730}
3731
3732
3733/**
3734 * nes_cm_start
3735 * Start and init a cm core module
3736 */
3737int nes_cm_start(void)
3738{
3739 nes_debug(NES_DBG_CM, "\n");
3740 /* create the primary CM core, pass this handle to subsequent core inits */
3741 g_cm_core = nes_cm_alloc_core();
615eb715 3742 if (g_cm_core)
3c2d774c 3743 return 0;
615eb715 3744 else
3c2d774c 3745 return -ENOMEM;
3c2d774c
GS		 3746}
3747
3748
3749/**
3750 * nes_cm_stop
3751 * stop and dealloc all cm core instances
3752 */
3753int nes_cm_stop(void)
3754{
3755 g_cm_core->api->destroy_cm_core(g_cm_core);
3756 return 0;
3757}
3758
3759
3760/**
3761 * cm_event_connected
3762 * handle a connected event, setup QPs and HW
3763 */
1a855fbf 3764static void cm_event_connected(struct nes_cm_event *event)
3c2d774c 3765{
3c2d774c
GS		 3766 struct nes_qp *nesqp;
3767 struct nes_vnic *nesvnic;
3768 struct nes_device *nesdev;
3769 struct nes_cm_node *cm_node;
3770 struct nes_adapter *nesadapter;
3771 struct ib_qp_attr attr;
3772 struct iw_cm_id *cm_id;
3773 struct iw_cm_event cm_event;
3c2d774c 3774 struct nes_v4_quad nes_quad;
30da7cff 3775 u32 crc_value;
3c2d774c 3776 int ret;
24d44a39
SW		 3777 struct sockaddr_in *laddr;
3778 struct sockaddr_in *raddr;
3779 struct sockaddr_in *cm_event_laddr;
3c2d774c
GS		 3780
3781 /* get all our handles */
3782 cm_node = event->cm_node;
3783 cm_id = cm_node->cm_id;
3784 nes_debug(NES_DBG_CM, "cm_event_connected - %p - cm_id = %p\n", cm_node, cm_id);
3785 nesqp = (struct nes_qp *)cm_id->provider_data;
3786 nesvnic = to_nesvnic(nesqp->ibqp.device);
3787 nesdev = nesvnic->nesdev;
3788 nesadapter = nesdev->nesadapter;
24d44a39
SW		 3789 laddr = (struct sockaddr_in *)&cm_id->local_addr;
3790 raddr = (struct sockaddr_in *)&cm_id->remote_addr;
3791 cm_event_laddr = (struct sockaddr_in *)&cm_event.local_addr;
3c2d774c 3792
615eb715 3793 if (nesqp->destroyed)
3c2d774c 3794 return;
3c2d774c
GS		 3795 atomic_inc(&cm_connecteds);
3796 nes_debug(NES_DBG_CM, "QP%u attempting to connect to 0x%08X:0x%04X on"
615eb715 3797 " local port 0x%04X. jiffies = %lu.\n",
24d44a39
SW		 3798 nesqp->hwqp.qp_id, ntohl(raddr->sin_addr.s_addr),
3799 ntohs(raddr->sin_port), ntohs(laddr->sin_port), jiffies);
3c2d774c
GS		 3800
3801 nes_cm_init_tsa_conn(nesqp, cm_node);
3802
3803 /* set the QP tsa context */
5647263c
TN		 3804 nesqp->nesqp_context->tcpPorts[0] =
3805 cpu_to_le16(cm_node->mapped_loc_port);
3806 nesqp->nesqp_context->tcpPorts[1] =
3807 cpu_to_le16(cm_node->mapped_rem_port);
3808 nesqp->nesqp_context->ip0 = cpu_to_le32(cm_node->mapped_rem_addr);
3c2d774c
GS		 3809
3810 nesqp->nesqp_context->misc2 |= cpu_to_le32(
6492cdf3
FL		 3811 (u32)PCI_FUNC(nesdev->pcidev->devfn) <<
3812 NES_QPCONTEXT_MISC2_SRC_IP_SHIFT);
3c2d774c 3813 nesqp->nesqp_context->arp_index_vlan |= cpu_to_le32(
6492cdf3
FL		 3814 nes_arp_table(nesdev,
3815 le32_to_cpu(nesqp->nesqp_context->ip0),
3c2d774c
GS		 3816 NULL, NES_ARP_RESOLVE) << 16);
3817 nesqp->nesqp_context->ts_val_delta = cpu_to_le32(
3818 jiffies - nes_read_indexed(nesdev, NES_IDX_TCP_NOW));
3819 nesqp->nesqp_context->ird_index = cpu_to_le32(nesqp->hwqp.qp_id);
3820 nesqp->nesqp_context->ird_ord_sizes |=
6492cdf3
FL		 3821 cpu_to_le32((u32)1 <<
3822 NES_QPCONTEXT_ORDIRD_IWARP_MODE_SHIFT);
4ac79a70
TN		 3823 nesqp->nesqp_context->ird_ord_sizes |=
3824 cpu_to_le32((u32)cm_node->ord_size);
3c2d774c
GS		 3825
3826 /* Adjust tail for not having a LSMM */
615eb715 3827 /*nesqp->hwqp.sq_tail = 1;*/
3c2d774c 3828
615eb715 3829 build_rdma0_msg(cm_node, &nesqp);
6492cdf3 3830
615eb715
TN		 3831 nes_write32(nesdev->regs + NES_WQE_ALLOC,
3832 (1 << 24) | 0x00800000 | nesqp->hwqp.qp_id);
3c2d774c
GS		 3833
3834 memset(&nes_quad, 0, sizeof(nes_quad));
3835
6492cdf3
FL		 3836 nes_quad.DstIpAdrIndex =
3837 cpu_to_le32((u32)PCI_FUNC(nesdev->pcidev->devfn) << 24);
5647263c
TN		 3838 nes_quad.SrcIpadr = htonl(cm_node->mapped_rem_addr);
3839 nes_quad.TcpPorts[0] = htons(cm_node->mapped_rem_port);
3840 nes_quad.TcpPorts[1] = htons(cm_node->mapped_loc_port);
3c2d774c
GS		 3841
3842 /* Produce hash key */
30da7cff
FL		 3843 crc_value = get_crc_value(&nes_quad);
3844 nesqp->hte_index = cpu_to_be32(crc_value ^ 0xffffffff);
3c2d774c 3845 nes_debug(NES_DBG_CM, "HTE Index = 0x%08X, After CRC = 0x%08X\n",
615eb715 3846 nesqp->hte_index, nesqp->hte_index & nesadapter->hte_index_mask);
3c2d774c
GS		 3847
3848 nesqp->hte_index &= nesadapter->hte_index_mask;
3849 nesqp->nesqp_context->hte_index = cpu_to_le32(nesqp->hte_index);
3850
3851 nesqp->ietf_frame = &cm_node->mpa_frame;
615eb715 3852 nesqp->private_data_len = (u8)cm_node->mpa_frame_size;
3c2d774c
GS		 3853 cm_node->cm_core->api->accelerated(cm_node->cm_core, cm_node);
3854
3c2d774c
GS		 3855 /* notify OF layer we successfully created the requested connection */
3856 cm_event.event = IW_CM_EVENT_CONNECT_REPLY;
d0c49bf3 3857 cm_event.status = 0;
3c2d774c 3858 cm_event.provider_data = cm_id->provider_data;
24d44a39
SW		 3859 cm_event_laddr->sin_family = AF_INET;
3860 cm_event_laddr->sin_port = laddr->sin_port;
3c2d774c
GS		 3861 cm_event.remote_addr = cm_id->remote_addr;
3862
6492cdf3 3863 cm_event.private_data = (void *)event->cm_node->mpa_frame_buf;
615eb715
TN		 3864 cm_event.private_data_len = (u8)event->cm_node->mpa_frame_size;
3865 cm_event.ird = cm_node->ird_size;
3866 cm_event.ord = cm_node->ord_size;
3c2d774c 3867
5647263c 3868 cm_event_laddr->sin_addr.s_addr = htonl(event->cm_info.rem_addr);
3c2d774c
GS		 3869 ret = cm_id->event_handler(cm_id, &cm_event);
3870 nes_debug(NES_DBG_CM, "OFA CM event_handler returned, ret=%d\n", ret);
3871
3872 if (ret)
6492cdf3 3873 printk(KERN_ERR "%s[%u] OFA CM event_handler returned, "
615eb715 3874 "ret=%d\n", __func__, __LINE__, ret);
6492cdf3
FL		 3875 attr.qp_state = IB_QPS_RTS;
3876 nes_modify_qp(&nesqp->ibqp, &attr, IB_QP_STATE, NULL);
3c2d774c 3877
6492cdf3 3878 nes_debug(NES_DBG_CM, "Exiting connect thread for QP%u. jiffies = "
615eb715 3879 "%lu\n", nesqp->hwqp.qp_id, jiffies);
3c2d774c
GS		 3880
3881 return;
3882}
3883
3884
3885/**
3886 * cm_event_connect_error
3887 */
1a855fbf 3888static void cm_event_connect_error(struct nes_cm_event *event)
3c2d774c
GS		 3889{
3890 struct nes_qp *nesqp;
3891 struct iw_cm_id *cm_id;
3892 struct iw_cm_event cm_event;
3893 /* struct nes_cm_info cm_info; */
3894 int ret;
3895
3896 if (!event->cm_node)
3897 return;
3898
3899 cm_id = event->cm_node->cm_id;
615eb715 3900 if (!cm_id)
3c2d774c 3901 return;
3c2d774c
GS		 3902
3903 nes_debug(NES_DBG_CM, "cm_node=%p, cm_id=%p\n", event->cm_node, cm_id);
3904 nesqp = cm_id->provider_data;
3905
615eb715 3906 if (!nesqp)
3c2d774c 3907 return;
3c2d774c
GS		 3908
3909 /* notify OF layer about this connection error event */
3910 /* cm_id->rem_ref(cm_id); */
3911 nesqp->cm_id = NULL;
3912 cm_id->provider_data = NULL;
3913 cm_event.event = IW_CM_EVENT_CONNECT_REPLY;
c5a7d489 3914 cm_event.status = -ECONNRESET;
3c2d774c
GS		 3915 cm_event.provider_data = cm_id->provider_data;
3916 cm_event.local_addr = cm_id->local_addr;
3917 cm_event.remote_addr = cm_id->remote_addr;
3918 cm_event.private_data = NULL;
3919 cm_event.private_data_len = 0;
3920
24d44a39
SW		 3921#ifdef CONFIG_INFINIBAND_NES_DEBUG
3922 {
3923 struct sockaddr_in *cm_event_laddr = (struct sockaddr_in *)
3924 &cm_event.local_addr;
3925 struct sockaddr_in *cm_event_raddr = (struct sockaddr_in *)
3926 &cm_event.remote_addr;
3927 nes_debug(NES_DBG_CM, "call CM_EVENT REJECTED, local_addr=%08x, remote_addr=%08x\n",
3928 cm_event_laddr->sin_addr.s_addr, cm_event_raddr->sin_addr.s_addr);
3929 }
3930#endif
3c2d774c
GS		 3931
3932 ret = cm_id->event_handler(cm_id, &cm_event);
3933 nes_debug(NES_DBG_CM, "OFA CM event_handler returned, ret=%d\n", ret);
3934 if (ret)
6492cdf3 3935 printk(KERN_ERR "%s[%u] OFA CM event_handler returned, "
615eb715 3936 "ret=%d\n", __func__, __LINE__, ret);
6492cdf3 3937 cm_id->rem_ref(cm_id);
3c2d774c 3938
6492cdf3 3939 rem_ref_cm_node(event->cm_node->cm_core, event->cm_node);
3c2d774c
GS		 3940 return;
3941}
3942
3943
3944/**
3945 * cm_event_reset
3946 */
1a855fbf 3947static void cm_event_reset(struct nes_cm_event *event)
3c2d774c
GS		 3948{
3949 struct nes_qp *nesqp;
3950 struct iw_cm_id *cm_id;
3951 struct iw_cm_event cm_event;
3952 /* struct nes_cm_info cm_info; */
3953 int ret;
3954
3955 if (!event->cm_node)
3956 return;
3957
3958 if (!event->cm_node->cm_id)
3959 return;
3960
3961 cm_id = event->cm_node->cm_id;
3962
3963 nes_debug(NES_DBG_CM, "%p - cm_id = %p\n", event->cm_node, cm_id);
3964 nesqp = cm_id->provider_data;
f9f3f1e0
FL		 3965 if (!nesqp)
3966 return;
3c2d774c
GS		 3967
3968 nesqp->cm_id = NULL;
3969 /* cm_id->provider_data = NULL; */
3970 cm_event.event = IW_CM_EVENT_DISCONNECT;
d0c49bf3 3971 cm_event.status = -ECONNRESET;
3c2d774c
GS		 3972 cm_event.provider_data = cm_id->provider_data;
3973 cm_event.local_addr = cm_id->local_addr;
3974 cm_event.remote_addr = cm_id->remote_addr;
3975 cm_event.private_data = NULL;
3976 cm_event.private_data_len = 0;
3977
183ecfa3 3978 cm_id->add_ref(cm_id);
f9f3f1e0 3979 ret = cm_id->event_handler(cm_id, &cm_event);
183ecfa3
FL		 3980 atomic_inc(&cm_closes);
3981 cm_event.event = IW_CM_EVENT_CLOSE;
d0c49bf3 3982 cm_event.status = 0;
183ecfa3
FL		 3983 cm_event.provider_data = cm_id->provider_data;
3984 cm_event.local_addr = cm_id->local_addr;
3985 cm_event.remote_addr = cm_id->remote_addr;
3986 cm_event.private_data = NULL;
3987 cm_event.private_data_len = 0;
3988 nes_debug(NES_DBG_CM, "NODE %p Generating CLOSE\n", event->cm_node);
3989 ret = cm_id->event_handler(cm_id, &cm_event);
3990
3c2d774c
GS		 3991 nes_debug(NES_DBG_CM, "OFA CM event_handler returned, ret=%d\n", ret);
3992
3993
3994 /* notify OF layer about this connection error event */
3995 cm_id->rem_ref(cm_id);
3996
3997 return;
3998}
3999
4000
4001/**
4002 * cm_event_mpa_req
4003 */
1a855fbf 4004static void cm_event_mpa_req(struct nes_cm_event *event)
3c2d774c 4005{
615eb715 4006 struct iw_cm_id *cm_id;
3c2d774c
GS		 4007 struct iw_cm_event cm_event;
4008 int ret;
4009 struct nes_cm_node *cm_node;
24d44a39
SW		 4010 struct sockaddr_in *cm_event_laddr = (struct sockaddr_in *)
4011 &cm_event.local_addr;
4012 struct sockaddr_in *cm_event_raddr = (struct sockaddr_in *)
4013 &cm_event.remote_addr;
3c2d774c
GS		 4014
4015 cm_node = event->cm_node;
4016 if (!cm_node)
4017 return;
4018 cm_id = cm_node->cm_id;
4019
4020 atomic_inc(&cm_connect_reqs);
4021 nes_debug(NES_DBG_CM, "cm_node = %p - cm_id = %p, jiffies = %lu\n",
615eb715 4022 cm_node, cm_id, jiffies);
3c2d774c
GS		 4023
4024 cm_event.event = IW_CM_EVENT_CONNECT_REQUEST;
d0c49bf3 4025 cm_event.status = 0;
3c2d774c
GS		 4026 cm_event.provider_data = (void *)cm_node;
4027
24d44a39
SW		 4028 cm_event_laddr->sin_family = AF_INET;
4029 cm_event_laddr->sin_port = htons(event->cm_info.loc_port);
4030 cm_event_laddr->sin_addr.s_addr = htonl(event->cm_info.loc_addr);
3c2d774c 4031
24d44a39
SW		 4032 cm_event_raddr->sin_family = AF_INET;
4033 cm_event_raddr->sin_port = htons(event->cm_info.rem_port);
4034 cm_event_raddr->sin_addr.s_addr = htonl(event->cm_info.rem_addr);
9d5ab133 4035 cm_event.private_data = cm_node->mpa_frame_buf;
615eb715 4036 cm_event.private_data_len = (u8)cm_node->mpa_frame_size;
4ac79a70
TN		 4037 if (cm_node->mpa_frame_rev == IETF_MPA_V1) {
4038 cm_event.ird = NES_MAX_IRD;
4039 cm_event.ord = NES_MAX_ORD;
4040 } else {
615eb715
TN		 4041 cm_event.ird = cm_node->ird_size;
4042 cm_event.ord = cm_node->ord_size;
4ac79a70 4043 }
9d5ab133
FL		 4044
4045 ret = cm_id->event_handler(cm_id, &cm_event);
4046 if (ret)
4047 printk(KERN_ERR "%s[%u] OFA CM event_handler returned, ret=%d\n",
615eb715 4048 __func__, __LINE__, ret);
9d5ab133
FL		 4049 return;
4050}
4051
4052
4053static void cm_event_mpa_reject(struct nes_cm_event *event)
4054{
615eb715 4055 struct iw_cm_id *cm_id;
9d5ab133
FL		 4056 struct iw_cm_event cm_event;
4057 struct nes_cm_node *cm_node;
4058 int ret;
24d44a39
SW		 4059 struct sockaddr_in *cm_event_laddr = (struct sockaddr_in *)
4060 &cm_event.local_addr;
4061 struct sockaddr_in *cm_event_raddr = (struct sockaddr_in *)
4062 &cm_event.remote_addr;
9d5ab133
FL		 4063
4064 cm_node = event->cm_node;
4065 if (!cm_node)
4066 return;
4067 cm_id = cm_node->cm_id;
4068
4069 atomic_inc(&cm_connect_reqs);
4070 nes_debug(NES_DBG_CM, "cm_node = %p - cm_id = %p, jiffies = %lu\n",
615eb715 4071 cm_node, cm_id, jiffies);
9d5ab133
FL		 4072
4073 cm_event.event = IW_CM_EVENT_CONNECT_REPLY;
4074 cm_event.status = -ECONNREFUSED;
4075 cm_event.provider_data = cm_id->provider_data;
4076
24d44a39
SW		 4077 cm_event_laddr->sin_family = AF_INET;
4078 cm_event_laddr->sin_port = htons(event->cm_info.loc_port);
4079 cm_event_laddr->sin_addr.s_addr = htonl(event->cm_info.loc_addr);
9d5ab133 4080
24d44a39
SW		 4081 cm_event_raddr->sin_family = AF_INET;
4082 cm_event_raddr->sin_port = htons(event->cm_info.rem_port);
4083 cm_event_raddr->sin_addr.s_addr = htonl(event->cm_info.rem_addr);
3c2d774c 4084
9d5ab133 4085 cm_event.private_data = cm_node->mpa_frame_buf;
615eb715 4086 cm_event.private_data_len = (u8)cm_node->mpa_frame_size;
9d5ab133
FL		 4087
4088 nes_debug(NES_DBG_CM, "call CM_EVENT_MPA_REJECTED, local_addr=%08x, "
615eb715 4089 "remove_addr=%08x\n",
24d44a39
SW		 4090 cm_event_laddr->sin_addr.s_addr,
4091 cm_event_raddr->sin_addr.s_addr);
3c2d774c
GS		 4092
4093 ret = cm_id->event_handler(cm_id, &cm_event);
4094 if (ret)
9d5ab133 4095 printk(KERN_ERR "%s[%u] OFA CM event_handler returned, ret=%d\n",
615eb715 4096 __func__, __LINE__, ret);
3c2d774c
GS		 4097
4098 return;
4099}
4100
4101
4102static void nes_cm_event_handler(struct work_struct *);
4103
4104/**
4105 * nes_cm_post_event
4106 * post an event to the cm event handler
4107 */
1a855fbf 4108static int nes_cm_post_event(struct nes_cm_event *event)
3c2d774c
GS		 4109{
4110 atomic_inc(&event->cm_node->cm_core->events_posted);
4111 add_ref_cm_node(event->cm_node);
4112 event->cm_info.cm_id->add_ref(event->cm_info.cm_id);
4113 INIT_WORK(&event->event_work, nes_cm_event_handler);
6492cdf3 4114 nes_debug(NES_DBG_CM, "cm_node=%p queue_work, event=%p\n",
615eb715 4115 event->cm_node, event);
3c2d774c
GS		 4116
4117 queue_work(event->cm_node->cm_core->event_wq, &event->event_work);
4118
4119 nes_debug(NES_DBG_CM, "Exit\n");
4120 return 0;
4121}
4122
4123
4124/**
4125 * nes_cm_event_handler
4126 * worker function to handle cm events
4127 * will free instance of nes_cm_event
4128 */
4129static void nes_cm_event_handler(struct work_struct *work)
4130{
6492cdf3 4131 struct nes_cm_event *event = container_of(work, struct nes_cm_event,
615eb715 4132 event_work);
3c2d774c
GS		 4133 struct nes_cm_core *cm_core;
4134
6492cdf3 4135 if ((!event) || (!event->cm_node) || (!event->cm_node->cm_core))
3c2d774c 4136 return;
6492cdf3 4137
3c2d774c
GS		 4138 cm_core = event->cm_node->cm_core;
4139 nes_debug(NES_DBG_CM, "event=%p, event->type=%u, events posted=%u\n",
615eb715 4140 event, event->type, atomic_read(&cm_core->events_posted));
3c2d774c
GS		 4141
4142 switch (event->type) {
6492cdf3
FL		 4143 case NES_CM_EVENT_MPA_REQ:
4144 cm_event_mpa_req(event);
4145 nes_debug(NES_DBG_CM, "cm_node=%p CM Event: MPA REQUEST\n",
615eb715 4146 event->cm_node);
6492cdf3
FL		 4147 break;
4148 case NES_CM_EVENT_RESET:
4149 nes_debug(NES_DBG_CM, "cm_node = %p CM Event: RESET\n",
615eb715 4150 event->cm_node);
6492cdf3
FL		 4151 cm_event_reset(event);
4152 break;
4153 case NES_CM_EVENT_CONNECTED:
4154 if ((!event->cm_node->cm_id) ||
615eb715 4155 (event->cm_node->state != NES_CM_STATE_TSA))
3c2d774c 4156 break;
6492cdf3
FL		 4157 cm_event_connected(event);
4158 nes_debug(NES_DBG_CM, "CM Event: CONNECTED\n");
4159 break;
9d5ab133
FL		 4160 case NES_CM_EVENT_MPA_REJECT:
4161 if ((!event->cm_node->cm_id) ||
615eb715 4162 (event->cm_node->state == NES_CM_STATE_TSA))
9d5ab133
FL		 4163 break;
4164 cm_event_mpa_reject(event);
4165 nes_debug(NES_DBG_CM, "CM Event: REJECT\n");
4166 break;
4167
6492cdf3
FL		 4168 case NES_CM_EVENT_ABORTED:
4169 if ((!event->cm_node->cm_id) ||
615eb715 4170 (event->cm_node->state == NES_CM_STATE_TSA))
3c2d774c 4171 break;
6492cdf3
FL		 4172 cm_event_connect_error(event);
4173 nes_debug(NES_DBG_CM, "CM Event: ABORTED\n");
4174 break;
4175 case NES_CM_EVENT_DROPPED_PKT:
4176 nes_debug(NES_DBG_CM, "CM Event: DROPPED PKT\n");
4177 break;
4178 default:
4179 nes_debug(NES_DBG_CM, "CM Event: UNKNOWN EVENT TYPE\n");
4180 break;
3c2d774c
GS		 4181 }
4182
4183 atomic_dec(&cm_core->events_posted);
4184 event->cm_info.cm_id->rem_ref(event->cm_info.cm_id);
4185 rem_ref_cm_node(cm_core, event->cm_node);
4186 kfree(event);
4187
4188 return;
4189}
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