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RDMA/nes: Report the actual address of the remote connecting peer
[deliverable/linux.git] / drivers / infiniband / hw / nes / nes_cm.c
CommitLineData
3c2d774c 1/*
5647263c 2 * Copyright (c) 2006 - 2014 Intel Corporation. All rights reserved.
3c2d774c
GS		 3 *
4 * This software is available to you under a choice of one of two
5 * licenses. You may choose to be licensed under the terms of the GNU
6 * General Public License (GPL) Version 2, available from the file
7 * COPYING in the main directory of this source tree, or the
8 * OpenIB.org BSD license below:
9 *
10 * Redistribution and use in source and binary forms, with or
11 * without modification, are permitted provided that the following
12 * conditions are met:
13 *
14 * - Redistributions of source code must retain the above
15 * copyright notice, this list of conditions and the following
16 * disclaimer.
17 *
18 * - Redistributions in binary form must reproduce the above
19 * copyright notice, this list of conditions and the following
20 * disclaimer in the documentation and/or other materials
21 * provided with the distribution.
22 *
23 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
24 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
25 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
26 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
27 * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
28 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
29 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
30 * SOFTWARE.
31 *
32 */
33
34
35#define TCPOPT_TIMESTAMP 8
36
60063497 37#include <linux/atomic.h>
3c2d774c
GS		 38#include <linux/skbuff.h>
39#include <linux/ip.h>
40#include <linux/tcp.h>
41#include <linux/init.h>
42#include <linux/if_arp.h>
f2b2b59b 43#include <linux/if_vlan.h>
3c2d774c
GS		 44#include <linux/notifier.h>
45#include <linux/net.h>
46#include <linux/types.h>
47#include <linux/timer.h>
48#include <linux/time.h>
49#include <linux/delay.h>
50#include <linux/etherdevice.h>
51#include <linux/netdevice.h>
52#include <linux/random.h>
53#include <linux/list.h>
54#include <linux/threads.h>
d2fa9b26 55#include <linux/highmem.h>
5a0e3ad6 56#include <linux/slab.h>
7191a0a1 57#include <net/arp.h>
3c2d774c
GS		 58#include <net/neighbour.h>
59#include <net/route.h>
60#include <net/ip_fib.h>
c11470f9 61#include <net/tcp.h>
5647263c 62#include <linux/fcntl.h>
3c2d774c
GS		 63
64#include "nes.h"
65
66u32 cm_packets_sent;
67u32 cm_packets_bounced;
68u32 cm_packets_dropped;
69u32 cm_packets_retrans;
70u32 cm_packets_created;
71u32 cm_packets_received;
6e10d2e4
FL		 72atomic_t cm_listens_created;
73atomic_t cm_listens_destroyed;
3c2d774c
GS		 74u32 cm_backlog_drops;
75atomic_t cm_loopbacks;
76atomic_t cm_nodes_created;
77atomic_t cm_nodes_destroyed;
78atomic_t cm_accel_dropped_pkts;
79atomic_t cm_resets_recvd;
80
615eb715
TN		 81static inline int mini_cm_accelerated(struct nes_cm_core *, struct nes_cm_node *);
82static struct nes_cm_listener *mini_cm_listen(struct nes_cm_core *, struct nes_vnic *, struct nes_cm_info *);
3c2d774c 83static int mini_cm_del_listen(struct nes_cm_core *, struct nes_cm_listener *);
615eb715 84static struct nes_cm_node *mini_cm_connect(struct nes_cm_core *, struct nes_vnic *, u16, void *, struct nes_cm_info *);
6492cdf3 85static int mini_cm_close(struct nes_cm_core *, struct nes_cm_node *);
615eb715
TN		 86static int mini_cm_accept(struct nes_cm_core *, struct nes_cm_node *);
87static int mini_cm_reject(struct nes_cm_core *, struct nes_cm_node *);
88static int mini_cm_recv_pkt(struct nes_cm_core *, struct nes_vnic *, struct sk_buff *);
1a855fbf
RD		 89static int mini_cm_dealloc_core(struct nes_cm_core *);
90static int mini_cm_get(struct nes_cm_core *);
91static int mini_cm_set(struct nes_cm_core *, u32, u32);
6492cdf3 92
615eb715 93static void form_cm_frame(struct sk_buff *, struct nes_cm_node *, void *, u32, void *, u32, u8);
6492cdf3
FL		 94static int add_ref_cm_node(struct nes_cm_node *);
95static int rem_ref_cm_node(struct nes_cm_core *, struct nes_cm_node *);
96
1a855fbf
RD		 97static int nes_cm_disconn_true(struct nes_qp *);
98static int nes_cm_post_event(struct nes_cm_event *event);
99static int nes_disconnect(struct nes_qp *nesqp, int abrupt);
100static void nes_disconnect_worker(struct work_struct *work);
6492cdf3
FL		 101
102static int send_mpa_request(struct nes_cm_node *, struct sk_buff *);
9d5ab133 103static int send_mpa_reject(struct nes_cm_node *);
6492cdf3
FL		 104static int send_syn(struct nes_cm_node *, u32, struct sk_buff *);
105static int send_reset(struct nes_cm_node *, struct sk_buff *);
106static int send_ack(struct nes_cm_node *cm_node, struct sk_buff *skb);
1a855fbf 107static int send_fin(struct nes_cm_node *cm_node, struct sk_buff *skb);
615eb715 108static void process_packet(struct nes_cm_node *, struct sk_buff *, struct nes_cm_core *);
6492cdf3
FL		 109
110static void active_open_err(struct nes_cm_node *, struct sk_buff *, int);
111static void passive_open_err(struct nes_cm_node *, struct sk_buff *, int);
112static void cleanup_retrans_entry(struct nes_cm_node *);
9d5ab133 113static void handle_rcv_mpa(struct nes_cm_node *, struct sk_buff *);
6492cdf3 114static void free_retrans_entry(struct nes_cm_node *cm_node);
615eb715 115static int handle_tcp_options(struct nes_cm_node *cm_node, struct tcphdr *tcph, struct sk_buff *skb, int optionsize, int passive);
6492cdf3
FL		 116
117/* CM event handler functions */
118static void cm_event_connected(struct nes_cm_event *);
119static void cm_event_connect_error(struct nes_cm_event *);
120static void cm_event_reset(struct nes_cm_event *);
121static void cm_event_mpa_req(struct nes_cm_event *);
9d5ab133
FL		 122static void cm_event_mpa_reject(struct nes_cm_event *);
123static void handle_recv_entry(struct nes_cm_node *cm_node, u32 rem_node);
6492cdf3 124
615eb715
TN		 125/* MPA build functions */
126static int cm_build_mpa_frame(struct nes_cm_node *, u8 **, u16 *, u8 *, u8);
127static void build_mpa_v2(struct nes_cm_node *, void *, u8);
128static void build_mpa_v1(struct nes_cm_node *, void *, u8);
129static void build_rdma0_msg(struct nes_cm_node *, struct nes_qp **);
130
6492cdf3 131static void print_core(struct nes_cm_core *core);
4ac79a70 132static void record_ird_ord(struct nes_cm_node *, u16, u16);
3c2d774c
GS		 133
134/* External CM API Interface */
135/* instance of function pointers for client API */
136/* set address of this instance to cm_core->cm_ops at cm_core alloc */
137static struct nes_cm_ops nes_cm_api = {
138 mini_cm_accelerated,
139 mini_cm_listen,
140 mini_cm_del_listen,
141 mini_cm_connect,
142 mini_cm_close,
143 mini_cm_accept,
144 mini_cm_reject,
145 mini_cm_recv_pkt,
146 mini_cm_dealloc_core,
147 mini_cm_get,
148 mini_cm_set
149};
150
1a855fbf 151static struct nes_cm_core *g_cm_core;
3c2d774c
GS		 152
153atomic_t cm_connects;
154atomic_t cm_accepts;
155atomic_t cm_disconnects;
156atomic_t cm_closes;
157atomic_t cm_connecteds;
158atomic_t cm_connect_reqs;
159atomic_t cm_rejects;
160
0f0bee8b
FL		 161int nes_add_ref_cm_node(struct nes_cm_node *cm_node)
162{
163 return add_ref_cm_node(cm_node);
164}
165
166int nes_rem_ref_cm_node(struct nes_cm_node *cm_node)
167{
168 return rem_ref_cm_node(cm_node->cm_core, cm_node);
169}
3c2d774c
GS		 170/**
171 * create_event
172 */
615eb715
TN		 173static struct nes_cm_event *create_event(struct nes_cm_node * cm_node,
174 enum nes_cm_event_type type)
3c2d774c
GS		 175{
176 struct nes_cm_event *event;
177
178 if (!cm_node->cm_id)
179 return NULL;
180
181 /* allocate an empty event */
182 event = kzalloc(sizeof(*event), GFP_ATOMIC);
183
184 if (!event)
185 return NULL;
186
187 event->type = type;
188 event->cm_node = cm_node;
189 event->cm_info.rem_addr = cm_node->rem_addr;
190 event->cm_info.loc_addr = cm_node->loc_addr;
191 event->cm_info.rem_port = cm_node->rem_port;
192 event->cm_info.loc_port = cm_node->loc_port;
193 event->cm_info.cm_id = cm_node->cm_id;
194
6492cdf3 195 nes_debug(NES_DBG_CM, "cm_node=%p Created event=%p, type=%u, "
615eb715
TN		 196 "dst_addr=%08x[%x], src_addr=%08x[%x]\n",
197 cm_node, event, type, event->cm_info.loc_addr,
198 event->cm_info.loc_port, event->cm_info.rem_addr,
199 event->cm_info.rem_port);
3c2d774c
GS		 200
201 nes_cm_post_event(event);
202 return event;
203}
204
205
206/**
207 * send_mpa_request
208 */
6492cdf3 209static int send_mpa_request(struct nes_cm_node *cm_node, struct sk_buff *skb)
3c2d774c 210{
615eb715
TN		 211 u8 start_addr = 0;
212 u8 *start_ptr = &start_addr;
213 u8 **start_buff = &start_ptr;
214 u16 buff_len = 0;
215
3c2d774c 216 if (!skb) {
6492cdf3 217 nes_debug(NES_DBG_CM, "skb set to NULL\n");
3c2d774c
GS		 218 return -1;
219 }
220
221 /* send an MPA Request frame */
615eb715
TN		 222 cm_build_mpa_frame(cm_node, start_buff, &buff_len, NULL, MPA_KEY_REQUEST);
223 form_cm_frame(skb, cm_node, NULL, 0, *start_buff, buff_len, SET_ACK);
3c2d774c 224
9d5ab133
FL		 225 return schedule_nes_timer(cm_node, skb, NES_TIMER_TYPE_SEND, 1, 0);
226}
3c2d774c 227
9d5ab133
FL		 228
229
230static int send_mpa_reject(struct nes_cm_node *cm_node)
231{
615eb715
TN		 232 struct sk_buff *skb = NULL;
233 u8 start_addr = 0;
234 u8 *start_ptr = &start_addr;
235 u8 **start_buff = &start_ptr;
236 u16 buff_len = 0;
81f99dcc 237 struct ietf_mpa_v1 *mpa_frame;
9d5ab133
FL		 238
239 skb = dev_alloc_skb(MAX_CM_BUFFER);
240 if (!skb) {
241 nes_debug(NES_DBG_CM, "Failed to get a Free pkt\n");
242 return -ENOMEM;
243 }
244
245 /* send an MPA reject frame */
615eb715 246 cm_build_mpa_frame(cm_node, start_buff, &buff_len, NULL, MPA_KEY_REPLY);
81f99dcc
TN		 247 mpa_frame = (struct ietf_mpa_v1 *)*start_buff;
248 mpa_frame->flags |= IETF_MPA_FLAGS_REJECT;
615eb715 249 form_cm_frame(skb, cm_node, NULL, 0, *start_buff, buff_len, SET_ACK | SET_FIN);
9d5ab133
FL		 250
251 cm_node->state = NES_CM_STATE_FIN_WAIT1;
252 return schedule_nes_timer(cm_node, skb, NES_TIMER_TYPE_SEND, 1, 0);
3c2d774c
GS		 253}
254
255
256/**
257 * recv_mpa - process a received TCP pkt, we are expecting an
258 * IETF MPA frame
259 */
9d5ab133 260static int parse_mpa(struct nes_cm_node *cm_node, u8 *buffer, u32 *type,
615eb715 261 u32 len)
3c2d774c 262{
615eb715
TN		 263 struct ietf_mpa_v1 *mpa_frame;
264 struct ietf_mpa_v2 *mpa_v2_frame;
265 struct ietf_rtr_msg *rtr_msg;
266 int mpa_hdr_len;
267 int priv_data_len;
3c2d774c 268
9d5ab133
FL		 269 *type = NES_MPA_REQUEST_ACCEPT;
270
3c2d774c 271 /* assume req frame is in tcp data payload */
615eb715 272 if (len < sizeof(struct ietf_mpa_v1)) {
3c2d774c 273 nes_debug(NES_DBG_CM, "The received ietf buffer was too small (%x)\n", len);
9d5ab133 274 return -EINVAL;
3c2d774c
GS		 275 }
276
615eb715
TN		 277 /* points to the beginning of the frame, which could be MPA V1 or V2 */
278 mpa_frame = (struct ietf_mpa_v1 *)buffer;
279 mpa_hdr_len = sizeof(struct ietf_mpa_v1);
280 priv_data_len = ntohs(mpa_frame->priv_data_len);
281
1cf078c9 282 /* make sure mpa private data len is less than 512 bytes */
615eb715 283 if (priv_data_len > IETF_MAX_PRIV_DATA_LEN) {
1cf078c9 284 nes_debug(NES_DBG_CM, "The received Length of Private"
615eb715 285 " Data field exceeds 512 octets\n");
1cf078c9
FL		 286 return -EINVAL;
287 }
288 /*
289 * make sure MPA receiver interoperate with the
290 * received MPA version and MPA key information
291 *
292 */
615eb715
TN		 293 if (mpa_frame->rev != IETF_MPA_V1 && mpa_frame->rev != IETF_MPA_V2) {
294 nes_debug(NES_DBG_CM, "The received mpa version"
295 " is not supported\n");
296 return -EINVAL;
297 }
298 /*
299 * backwards compatibility only
300 */
301 if (mpa_frame->rev > cm_node->mpa_frame_rev) {
1cf078c9 302 nes_debug(NES_DBG_CM, "The received mpa version"
615eb715 303 " can not be interoperated\n");
1cf078c9 304 return -EINVAL;
615eb715
TN		 305 } else {
306 cm_node->mpa_frame_rev = mpa_frame->rev;
1cf078c9 307 }
615eb715 308
1cf078c9
FL		 309 if (cm_node->state != NES_CM_STATE_MPAREQ_SENT) {
310 if (memcmp(mpa_frame->key, IEFT_MPA_KEY_REQ, IETF_MPA_KEY_SIZE)) {
311 nes_debug(NES_DBG_CM, "Unexpected MPA Key received \n");
312 return -EINVAL;
313 }
314 } else {
315 if (memcmp(mpa_frame->key, IEFT_MPA_KEY_REP, IETF_MPA_KEY_SIZE)) {
316 nes_debug(NES_DBG_CM, "Unexpected MPA Key received \n");
317 return -EINVAL;
318 }
319 }
3c2d774c 320
615eb715 321 if (priv_data_len + mpa_hdr_len != len) {
3c2d774c 322 nes_debug(NES_DBG_CM, "The received ietf buffer was not right"
615eb715
TN		 323 " complete (%x + %x != %x)\n",
324 priv_data_len, mpa_hdr_len, len);
9d5ab133
FL		 325 return -EINVAL;
326 }
327 /* make sure it does not exceed the max size */
328 if (len > MAX_CM_BUFFER) {
329 nes_debug(NES_DBG_CM, "The received ietf buffer was too large"
615eb715
TN		 330 " (%x + %x != %x)\n",
331 priv_data_len, mpa_hdr_len, len);
9d5ab133 332 return -EINVAL;
3c2d774c
GS		 333 }
334
615eb715
TN		 335 cm_node->mpa_frame_size = priv_data_len;
336
337 switch (mpa_frame->rev) {
338 case IETF_MPA_V2: {
339 u16 ird_size;
340 u16 ord_size;
8dd87fba
TN		 341 u16 rtr_ctrl_ird;
342 u16 rtr_ctrl_ord;
343
615eb715
TN		 344 mpa_v2_frame = (struct ietf_mpa_v2 *)buffer;
345 mpa_hdr_len += IETF_RTR_MSG_SIZE;
346 cm_node->mpa_frame_size -= IETF_RTR_MSG_SIZE;
347 rtr_msg = &mpa_v2_frame->rtr_msg;
348
349 /* parse rtr message */
8dd87fba
TN		 350 rtr_ctrl_ird = ntohs(rtr_msg->ctrl_ird);
351 rtr_ctrl_ord = ntohs(rtr_msg->ctrl_ord);
352 ird_size = rtr_ctrl_ird & IETF_NO_IRD_ORD;
353 ord_size = rtr_ctrl_ord & IETF_NO_IRD_ORD;
615eb715 354
8dd87fba 355 if (!(rtr_ctrl_ird & IETF_PEER_TO_PEER)) {
615eb715
TN		 356 /* send reset */
357 return -EINVAL;
358 }
4ac79a70
TN		 359 if (ird_size == IETF_NO_IRD_ORD || ord_size == IETF_NO_IRD_ORD)
360 cm_node->mpav2_ird_ord = IETF_NO_IRD_ORD;
615eb715 361
4ac79a70 362 if (cm_node->mpav2_ird_ord != IETF_NO_IRD_ORD) {
615eb715 363 /* responder */
4ac79a70
TN		 364 if (cm_node->state != NES_CM_STATE_MPAREQ_SENT) {
365 /* we are still negotiating */
366 if (ord_size > NES_MAX_IRD) {
367 cm_node->ird_size = NES_MAX_IRD;
368 } else {
369 cm_node->ird_size = ord_size;
370 if (ord_size == 0 &&
371 (rtr_ctrl_ord & IETF_RDMA0_READ)) {
372 cm_node->ird_size = 1;
373 nes_debug(NES_DBG_CM,
374 "%s: Remote peer doesn't support RDMA0_READ (ord=%u)\n",
375 __func__, ord_size);
376 }
377 }
378 if (ird_size > NES_MAX_ORD)
379 cm_node->ord_size = NES_MAX_ORD;
380 else
381 cm_node->ord_size = ird_size;
382 } else { /* initiator */
383 if (ord_size > NES_MAX_IRD) {
384 nes_debug(NES_DBG_CM,
385 "%s: Unable to support the requested (ord =%u)\n",
386 __func__, ord_size);
387 return -EINVAL;
388 }
389 cm_node->ird_size = ord_size;
390
391 if (ird_size > NES_MAX_ORD) {
392 cm_node->ord_size = NES_MAX_ORD;
393 } else {
394 if (ird_size == 0 &&
395 (rtr_ctrl_ord & IETF_RDMA0_READ)) {
396 nes_debug(NES_DBG_CM,
397 "%s: Remote peer doesn't support RDMA0_READ (ird=%u)\n",
398 __func__, ird_size);
399 return -EINVAL;
400 } else {
401 cm_node->ord_size = ird_size;
402 }
403 }
615eb715
TN		 404 }
405 }
406
8dd87fba 407 if (rtr_ctrl_ord & IETF_RDMA0_READ) {
615eb715 408 cm_node->send_rdma0_op = SEND_RDMA_READ_ZERO;
4ac79a70 409
8dd87fba 410 } else if (rtr_ctrl_ord & IETF_RDMA0_WRITE) {
615eb715
TN		 411 cm_node->send_rdma0_op = SEND_RDMA_WRITE_ZERO;
412 } else { /* Not supported RDMA0 operation */
413 return -EINVAL;
414 }
415 break;
416 }
417 case IETF_MPA_V1:
418 default:
419 break;
420 }
421
3c2d774c 422 /* copy entire MPA frame to our cm_node's frame */
615eb715 423 memcpy(cm_node->mpa_frame_buf, buffer + mpa_hdr_len, cm_node->mpa_frame_size);
3c2d774c 424
9d5ab133
FL		 425 if (mpa_frame->flags & IETF_MPA_FLAGS_REJECT)
426 *type = NES_MPA_REQUEST_REJECT;
3c2d774c
GS		 427 return 0;
428}
429
430
3c2d774c
GS		 431/**
432 * form_cm_frame - get a free packet and build empty frame Use
433 * node info to build.
434 */
6098d107 435static void form_cm_frame(struct sk_buff *skb,
615eb715
TN		 436 struct nes_cm_node *cm_node, void *options, u32 optionsize,
437 void *data, u32 datasize, u8 flags)
3c2d774c
GS		 438{
439 struct tcphdr *tcph;
440 struct iphdr *iph;
441 struct ethhdr *ethh;
442 u8 *buf;
443 u16 packetsize = sizeof(*iph);
444
445 packetsize += sizeof(*tcph);
615eb715 446 packetsize += optionsize + datasize;
3c2d774c 447
615eb715 448 skb_trim(skb, 0);
3c2d774c
GS		 449 memset(skb->data, 0x00, ETH_HLEN + sizeof(*iph) + sizeof(*tcph));
450
3c2d774c
GS		 451 buf = skb_put(skb, packetsize + ETH_HLEN);
452
615eb715 453 ethh = (struct ethhdr *)buf;
3c2d774c
GS		 454 buf += ETH_HLEN;
455
456 iph = (struct iphdr *)buf;
457 buf += sizeof(*iph);
458 tcph = (struct tcphdr *)buf;
459 skb_reset_mac_header(skb);
460 skb_set_network_header(skb, ETH_HLEN);
615eb715 461 skb_set_transport_header(skb, ETH_HLEN + sizeof(*iph));
3c2d774c
GS		 462 buf += sizeof(*tcph);
463
464 skb->ip_summed = CHECKSUM_PARTIAL;
fc4ba729
TN		 465 if (!(cm_node->netdev->features & NETIF_F_IP_CSUM))
466 skb->ip_summed = CHECKSUM_NONE;
3c2d774c
GS		 467 skb->protocol = htons(0x800);
468 skb->data_len = 0;
469 skb->mac_len = ETH_HLEN;
470
471 memcpy(ethh->h_dest, cm_node->rem_mac, ETH_ALEN);
472 memcpy(ethh->h_source, cm_node->loc_mac, ETH_ALEN);
473 ethh->h_proto = htons(0x0800);
474
475 iph->version = IPVERSION;
615eb715 476 iph->ihl = 5; /* 5 * 4Byte words, IP headr len */
3c2d774c
GS		 477 iph->tos = 0;
478 iph->tot_len = htons(packetsize);
479 iph->id = htons(++cm_node->tcp_cntxt.loc_id);
480
481 iph->frag_off = htons(0x4000);
482 iph->ttl = 0x40;
615eb715 483 iph->protocol = 0x06; /* IPPROTO_TCP */
3c2d774c 484
5647263c
TN		 485 iph->saddr = htonl(cm_node->mapped_loc_addr);
486 iph->daddr = htonl(cm_node->mapped_rem_addr);
3c2d774c 487
5647263c
TN		 488 tcph->source = htons(cm_node->mapped_loc_port);
489 tcph->dest = htons(cm_node->mapped_rem_port);
3c2d774c
GS		 490 tcph->seq = htonl(cm_node->tcp_cntxt.loc_seq_num);
491
492 if (flags & SET_ACK) {
493 cm_node->tcp_cntxt.loc_ack_num = cm_node->tcp_cntxt.rcv_nxt;
494 tcph->ack_seq = htonl(cm_node->tcp_cntxt.loc_ack_num);
495 tcph->ack = 1;
615eb715 496 } else {
3c2d774c 497 tcph->ack_seq = 0;
615eb715 498 }
3c2d774c
GS		 499
500 if (flags & SET_SYN) {
501 cm_node->tcp_cntxt.loc_seq_num++;
502 tcph->syn = 1;
615eb715 503 } else {
6492cdf3 504 cm_node->tcp_cntxt.loc_seq_num += datasize;
615eb715 505 }
3c2d774c 506
6492cdf3
FL		 507 if (flags & SET_FIN) {
508 cm_node->tcp_cntxt.loc_seq_num++;
3c2d774c 509 tcph->fin = 1;
6492cdf3 510 }
3c2d774c
GS		 511
512 if (flags & SET_RST)
513 tcph->rst = 1;
514
515 tcph->doff = (u16)((sizeof(*tcph) + optionsize + 3) >> 2);
516 tcph->window = htons(cm_node->tcp_cntxt.rcv_wnd);
517 tcph->urg_ptr = 0;
518 if (optionsize)
519 memcpy(buf, options, optionsize);
520 buf += optionsize;
521 if (datasize)
522 memcpy(buf, data, datasize);
523
524 skb_shinfo(skb)->nr_frags = 0;
525 cm_packets_created++;
3c2d774c
GS		 526}
527
5647263c
TN		 528/*
529 * nes_create_sockaddr - Record ip addr and tcp port in a sockaddr struct
530 */
531static void nes_create_sockaddr(__be32 ip_addr, __be16 port,
532 struct sockaddr_storage *addr)
533{
534 struct sockaddr_in *nes_sockaddr = (struct sockaddr_in *)addr;
535 nes_sockaddr->sin_family = AF_INET;
536 memcpy(&nes_sockaddr->sin_addr.s_addr, &ip_addr, sizeof(__be32));
537 nes_sockaddr->sin_port = port;
538}
539
540/*
541 * nes_create_mapinfo - Create a mapinfo object in the port mapper data base
542 */
543static int nes_create_mapinfo(struct nes_cm_info *cm_info)
544{
545 struct sockaddr_storage local_sockaddr;
546 struct sockaddr_storage mapped_sockaddr;
547
548 nes_create_sockaddr(htonl(cm_info->loc_addr), htons(cm_info->loc_port),
549 &local_sockaddr);
550 nes_create_sockaddr(htonl(cm_info->mapped_loc_addr),
551 htons(cm_info->mapped_loc_port), &mapped_sockaddr);
552
553 return iwpm_create_mapinfo(&local_sockaddr,
554 &mapped_sockaddr, RDMA_NL_NES);
555}
556
557/*
558 * nes_remove_mapinfo - Remove a mapinfo object from the port mapper data base
559 * and send a remove mapping op message to
560 * the userspace port mapper
561 */
562static int nes_remove_mapinfo(u32 loc_addr, u16 loc_port,
563 u32 mapped_loc_addr, u16 mapped_loc_port)
564{
565 struct sockaddr_storage local_sockaddr;
566 struct sockaddr_storage mapped_sockaddr;
567
568 nes_create_sockaddr(htonl(loc_addr), htons(loc_port), &local_sockaddr);
569 nes_create_sockaddr(htonl(mapped_loc_addr), htons(mapped_loc_port),
570 &mapped_sockaddr);
571
572 iwpm_remove_mapinfo(&local_sockaddr, &mapped_sockaddr);
573 return iwpm_remove_mapping(&local_sockaddr, RDMA_NL_NES);
574}
575
576/*
577 * nes_form_pm_msg - Form a port mapper message with mapping info
578 */
579static void nes_form_pm_msg(struct nes_cm_info *cm_info,
580 struct iwpm_sa_data *pm_msg)
581{
582 nes_create_sockaddr(htonl(cm_info->loc_addr), htons(cm_info->loc_port),
583 &pm_msg->loc_addr);
584 nes_create_sockaddr(htonl(cm_info->rem_addr), htons(cm_info->rem_port),
585 &pm_msg->rem_addr);
586}
587
588/*
589 * nes_form_reg_msg - Form a port mapper message with dev info
590 */
591static void nes_form_reg_msg(struct nes_vnic *nesvnic,
592 struct iwpm_dev_data *pm_msg)
593{
594 memcpy(pm_msg->dev_name, nesvnic->nesibdev->ibdev.name,
595 IWPM_DEVNAME_SIZE);
596 memcpy(pm_msg->if_name, nesvnic->netdev->name, IWPM_IFNAME_SIZE);
597}
598
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;
3c2d774c 1523
78fbfd8a 1524 rt = ip_route_output(&init_net, htonl(dst_ip), 0, 0, 0);
b23dd4fe 1525 if (IS_ERR(rt)) {
9d5ab133 1526 printk(KERN_ERR "%s: ip_route_output_key failed for 0x%08X\n",
615eb715 1527 __func__, dst_ip);
7191a0a1 1528 return rc;
3c2d774c
GS		 1529 }
1530
cf55bb24 1531 if (netif_is_bond_slave(nesvnic->netdev))
7f6e7101 1532 netdev = netdev_master_upper_dev_get(nesvnic->netdev);
2a4c97ea
MS		 1533 else
1534 netdev = nesvnic->netdev;
1535
ef3d0c4a 1536 neigh = neigh_lookup(&arp_tbl, &rt->rt_gateway, netdev);
e55684fa 1537
40e2bb58 1538 rcu_read_lock();
7191a0a1
BS		 1539 if (neigh) {
1540 if (neigh->nud_state & NUD_VALID) {
1541 nes_debug(NES_DBG_CM, "Neighbor MAC address for 0x%08X"
e174961c
JB		 1542 " is %pM, Gateway is 0x%08X \n", dst_ip,
1543 neigh->ha, ntohl(rt->rt_gateway));
7a576dfd
FL		 1544
1545 if (arpindex >= 0) {
79adc532 1546 if (ether_addr_equal(nesadapter->arp_table[arpindex].mac_addr, neigh->ha)) {
7a576dfd 1547 /* Mac address same as in nes_arp_table */
e55684fa 1548 goto out;
7a576dfd
FL		 1549 }
1550
1551 nes_manage_arp_cache(nesvnic->netdev,
615eb715
TN		 1552 nesadapter->arp_table[arpindex].mac_addr,
1553 dst_ip, NES_ARP_DELETE);
7a576dfd
FL		 1554 }
1555
7191a0a1
BS		 1556 nes_manage_arp_cache(nesvnic->netdev, neigh->ha,
1557 dst_ip, NES_ARP_ADD);
1558 rc = nes_arp_table(nesvnic->nesdev, dst_ip, NULL,
1559 NES_ARP_RESOLVE);
40e2bb58
DM		 1560 } else {
1561 neigh_event_send(neigh, NULL);
7191a0a1 1562 }
580da35a 1563 }
e55684fa 1564out:
40e2bb58 1565 rcu_read_unlock();
e55684fa
DM		 1566
1567 if (neigh)
1568 neigh_release(neigh);
1569
3c2d774c 1570 ip_rt_put(rt);
7191a0a1 1571 return rc;
3c2d774c
GS		 1572}
1573
3c2d774c
GS		 1574/**
1575 * make_cm_node - create a new instance of a cm node
1576 */
1577static struct nes_cm_node *make_cm_node(struct nes_cm_core *cm_core,
615eb715
TN		 1578 struct nes_vnic *nesvnic, struct nes_cm_info *cm_info,
1579 struct nes_cm_listener *listener)
3c2d774c
GS		 1580{
1581 struct nes_cm_node *cm_node;
1582 struct timespec ts;
7a576dfd 1583 int oldarpindex = 0;
3c2d774c
GS		 1584 int arpindex = 0;
1585 struct nes_device *nesdev;
1586 struct nes_adapter *nesadapter;
1587
1588 /* create an hte and cm_node for this instance */
1589 cm_node = kzalloc(sizeof(*cm_node), GFP_ATOMIC);
1590 if (!cm_node)
1591 return NULL;
1592
1593 /* set our node specific transport info */
230da36a
TN		 1594 if (listener) {
1595 cm_node->loc_addr = listener->loc_addr;
1596 cm_node->loc_port = listener->loc_port;
1597 } else {
1598 cm_node->loc_addr = cm_info->loc_addr;
1599 cm_node->loc_port = cm_info->loc_port;
1600 }
3c2d774c 1601 cm_node->rem_addr = cm_info->rem_addr;
3c2d774c 1602 cm_node->rem_port = cm_info->rem_port;
615eb715 1603
5647263c
TN		 1604 cm_node->mapped_loc_addr = cm_info->mapped_loc_addr;
1605 cm_node->mapped_rem_addr = cm_info->mapped_rem_addr;
1606 cm_node->mapped_loc_port = cm_info->mapped_loc_port;
1607 cm_node->mapped_rem_port = cm_info->mapped_rem_port;
1608
615eb715
TN		 1609 cm_node->mpa_frame_rev = mpa_version;
1610 cm_node->send_rdma0_op = SEND_RDMA_READ_ZERO;
4ac79a70
TN		 1611 cm_node->mpav2_ird_ord = 0;
1612 cm_node->ird_size = 0;
1613 cm_node->ord_size = 0;
615eb715 1614
63779436
HH		 1615 nes_debug(NES_DBG_CM, "Make node addresses : loc = %pI4:%x, rem = %pI4:%x\n",
1616 &cm_node->loc_addr, cm_node->loc_port,
1617 &cm_node->rem_addr, cm_node->rem_port);
3c2d774c
GS		 1618 cm_node->listener = listener;
1619 cm_node->netdev = nesvnic->netdev;
1620 cm_node->cm_id = cm_info->cm_id;
1621 memcpy(cm_node->loc_mac, nesvnic->netdev->dev_addr, ETH_ALEN);
1622
6492cdf3 1623 nes_debug(NES_DBG_CM, "listener=%p, cm_id=%p\n", cm_node->listener,
615eb715 1624 cm_node->cm_id);
3c2d774c 1625
3c2d774c 1626 spin_lock_init(&cm_node->retrans_list_lock);
3c2d774c
GS		 1627
1628 cm_node->loopbackpartner = NULL;
1629 atomic_set(&cm_node->ref_count, 1);
1630 /* associate our parent CM core */
1631 cm_node->cm_core = cm_core;
1632 cm_node->tcp_cntxt.loc_id = NES_CM_DEF_LOCAL_ID;
1633 cm_node->tcp_cntxt.rcv_wscale = NES_CM_DEFAULT_RCV_WND_SCALE;
1634 cm_node->tcp_cntxt.rcv_wnd = NES_CM_DEFAULT_RCV_WND_SCALED >>
615eb715 1635 NES_CM_DEFAULT_RCV_WND_SCALE;
3c2d774c
GS		 1636 ts = current_kernel_time();
1637 cm_node->tcp_cntxt.loc_seq_num = htonl(ts.tv_nsec);
1638 cm_node->tcp_cntxt.mss = nesvnic->max_frame_size - sizeof(struct iphdr) -
615eb715 1639 sizeof(struct tcphdr) - ETH_HLEN - VLAN_HLEN;
3c2d774c
GS		 1640 cm_node->tcp_cntxt.rcv_nxt = 0;
1641 /* get a unique session ID , add thread_id to an upcounter to handle race */
1642 atomic_inc(&cm_core->node_cnt);
3c2d774c
GS		 1643 cm_node->conn_type = cm_info->conn_type;
1644 cm_node->apbvt_set = 0;
1645 cm_node->accept_pend = 0;
1646
1647 cm_node->nesvnic = nesvnic;
1648 /* get some device handles, for arp lookup */
1649 nesdev = nesvnic->nesdev;
1650 nesadapter = nesdev->nesadapter;
1651
1652 cm_node->loopbackpartner = NULL;
7a576dfd 1653
3c2d774c 1654 /* get the mac addr for the remote node */
5647263c
TN		 1655 oldarpindex = nes_arp_table(nesdev, cm_node->mapped_rem_addr,
1656 NULL, NES_ARP_RESOLVE);
1657 arpindex = nes_addr_resolve_neigh(nesvnic,
1658 cm_node->mapped_rem_addr, oldarpindex);
3c2d774c 1659 if (arpindex < 0) {
7a576dfd
FL		 1660 kfree(cm_node);
1661 return NULL;
3c2d774c
GS		 1662 }
1663
1664 /* copy the mac addr to node context */
1665 memcpy(cm_node->rem_mac, nesadapter->arp_table[arpindex].mac_addr, ETH_ALEN);
e174961c
JB		 1666 nes_debug(NES_DBG_CM, "Remote mac addr from arp table: %pM\n",
1667 cm_node->rem_mac);
3c2d774c
GS		 1668
1669 add_hte_node(cm_core, cm_node);
1670 atomic_inc(&cm_nodes_created);
1671
1672 return cm_node;
1673}
1674
1675
1676/**
1677 * add_ref_cm_node - destroy an instance of a cm node
1678 */
1679static int add_ref_cm_node(struct nes_cm_node *cm_node)
1680{
1681 atomic_inc(&cm_node->ref_count);
1682 return 0;
1683}
1684
1685
1686/**
1687 * rem_ref_cm_node - destroy an instance of a cm node
1688 */
1689static int rem_ref_cm_node(struct nes_cm_core *cm_core,
615eb715 1690 struct nes_cm_node *cm_node)
3c2d774c 1691{
9d5ab133 1692 unsigned long flags;
3c2d774c
GS		 1693 struct nes_qp *nesqp;
1694
1695 if (!cm_node)
1696 return -EINVAL;
1697
1698 spin_lock_irqsave(&cm_node->cm_core->ht_lock, flags);
1699 if (atomic_dec_return(&cm_node->ref_count)) {
1700 spin_unlock_irqrestore(&cm_node->cm_core->ht_lock, flags);
1701 return 0;
1702 }
1703 list_del(&cm_node->list);
1704 atomic_dec(&cm_core->ht_node_cnt);
1705 spin_unlock_irqrestore(&cm_node->cm_core->ht_lock, flags);
1706
1707 /* if the node is destroyed before connection was accelerated */
1708 if (!cm_node->accelerated && cm_node->accept_pend) {
1709 BUG_ON(!cm_node->listener);
1710 atomic_dec(&cm_node->listener->pend_accepts_cnt);
1711 BUG_ON(atomic_read(&cm_node->listener->pend_accepts_cnt) < 0);
1712 }
9d5ab133
FL		 1713 WARN_ON(cm_node->send_entry);
1714 if (cm_node->recv_entry)
1715 handle_recv_entry(cm_node, 0);
3c2d774c
GS		 1716 if (cm_node->listener) {
1717 mini_cm_dec_refcnt_listen(cm_core, cm_node->listener, 0);
1718 } else {
1719 if (cm_node->apbvt_set && cm_node->nesvnic) {
5647263c
TN		 1720 nes_manage_apbvt(cm_node->nesvnic, cm_node->mapped_loc_port,
1721 PCI_FUNC(cm_node->nesvnic->nesdev->pcidev->devfn),
615eb715 1722 NES_MANAGE_APBVT_DEL);
3c2d774c 1723 }
5647263c
TN		 1724 nes_debug(NES_DBG_NLMSG, "Delete APBVT mapped_loc_port = %04X\n",
1725 cm_node->mapped_loc_port);
1726 nes_remove_mapinfo(cm_node->loc_addr, cm_node->loc_port,
1727 cm_node->mapped_loc_addr, cm_node->mapped_loc_port);
3c2d774c
GS		 1728 }
1729
3c2d774c
GS		 1730 atomic_dec(&cm_core->node_cnt);
1731 atomic_inc(&cm_nodes_destroyed);
6492cdf3
FL		 1732 nesqp = cm_node->nesqp;
1733 if (nesqp) {
1734 nesqp->cm_node = NULL;
1735 nes_rem_ref(&nesqp->ibqp);
1736 cm_node->nesqp = NULL;
1737 }
3c2d774c 1738
6492cdf3 1739 kfree(cm_node);
3c2d774c
GS		 1740 return 0;
1741}
1742
3c2d774c
GS		 1743/**
1744 * process_options
1745 */
6492cdf3 1746static int process_options(struct nes_cm_node *cm_node, u8 *optionsloc,
615eb715 1747 u32 optionsize, u32 syn_packet)
3c2d774c
GS		 1748{
1749 u32 tmp;
1750 u32 offset = 0;
1751 union all_known_options *all_options;
1752 char got_mss_option = 0;
1753
1754 while (offset < optionsize) {
1755 all_options = (union all_known_options *)(optionsloc + offset);
1756 switch (all_options->as_base.optionnum) {
6492cdf3
FL		 1757 case OPTION_NUMBER_END:
1758 offset = optionsize;
1759 break;
1760 case OPTION_NUMBER_NONE:
1761 offset += 1;
1762 continue;
1763 case OPTION_NUMBER_MSS:
1764 nes_debug(NES_DBG_CM, "%s: MSS Length: %d Offset: %d "
615eb715
TN		 1765 "Size: %d\n", __func__,
1766 all_options->as_mss.length, offset, optionsize);
6492cdf3
FL		 1767 got_mss_option = 1;
1768 if (all_options->as_mss.length != 4) {
1769 return 1;
1770 } else {
1771 tmp = ntohs(all_options->as_mss.mss);
1772 if (tmp > 0 && tmp <
615eb715 1773 cm_node->tcp_cntxt.mss)
6492cdf3
FL		 1774 cm_node->tcp_cntxt.mss = tmp;
1775 }
1776 break;
1777 case OPTION_NUMBER_WINDOW_SCALE:
1778 cm_node->tcp_cntxt.snd_wscale =
1779 all_options->as_windowscale.shiftcount;
1780 break;
6492cdf3
FL		 1781 default:
1782 nes_debug(NES_DBG_CM, "TCP Option not understood: %x\n",
615eb715 1783 all_options->as_base.optionnum);
6492cdf3 1784 break;
3c2d774c
GS		 1785 }
1786 offset += all_options->as_base.length;
1787 }
1788 if ((!got_mss_option) && (syn_packet))
1789 cm_node->tcp_cntxt.mss = NES_CM_DEFAULT_MSS;
1790 return 0;
1791}
1792
6492cdf3
FL		 1793static void drop_packet(struct sk_buff *skb)
1794{
1795 atomic_inc(&cm_accel_dropped_pkts);
1796 dev_kfree_skb_any(skb);
1797}
3c2d774c 1798
9d5ab133 1799static void handle_fin_pkt(struct nes_cm_node *cm_node)
3c2d774c 1800{
6492cdf3 1801 nes_debug(NES_DBG_CM, "Received FIN, cm_node = %p, state = %u. "
615eb715
TN		 1802 "refcnt=%d\n", cm_node, cm_node->state,
1803 atomic_read(&cm_node->ref_count));
6492cdf3
FL		 1804 switch (cm_node->state) {
1805 case NES_CM_STATE_SYN_RCVD:
1806 case NES_CM_STATE_SYN_SENT:
1807 case NES_CM_STATE_ESTABLISHED:
9d5ab133 1808 case NES_CM_STATE_MPAREJ_RCVD:
109d67e4
FL		 1809 cm_node->tcp_cntxt.rcv_nxt++;
1810 cleanup_retrans_entry(cm_node);
6492cdf3 1811 cm_node->state = NES_CM_STATE_LAST_ACK;
9d5ab133 1812 send_fin(cm_node, NULL);
6492cdf3 1813 break;
b1190d3e
FL		 1814 case NES_CM_STATE_MPAREQ_SENT:
1815 create_event(cm_node, NES_CM_EVENT_ABORTED);
1816 cm_node->tcp_cntxt.rcv_nxt++;
1817 cleanup_retrans_entry(cm_node);
1818 cm_node->state = NES_CM_STATE_CLOSED;
1819 add_ref_cm_node(cm_node);
1820 send_reset(cm_node, NULL);
1821 break;
6492cdf3 1822 case NES_CM_STATE_FIN_WAIT1:
109d67e4
FL		 1823 cm_node->tcp_cntxt.rcv_nxt++;
1824 cleanup_retrans_entry(cm_node);
6492cdf3 1825 cm_node->state = NES_CM_STATE_CLOSING;
9d5ab133 1826 send_ack(cm_node, NULL);
25985edc 1827 /* Wait for ACK as this is simultaneous close..
9d5ab133
FL		 1828 * After we receive ACK, do not send anything..
1829 * Just rm the node.. Done.. */
6492cdf3
FL		 1830 break;
1831 case NES_CM_STATE_FIN_WAIT2:
109d67e4
FL		 1832 cm_node->tcp_cntxt.rcv_nxt++;
1833 cleanup_retrans_entry(cm_node);
6492cdf3 1834 cm_node->state = NES_CM_STATE_TIME_WAIT;
9d5ab133
FL		 1835 send_ack(cm_node, NULL);
1836 schedule_nes_timer(cm_node, NULL, NES_TIMER_TYPE_CLOSE, 1, 0);
1837 break;
1838 case NES_CM_STATE_TIME_WAIT:
109d67e4
FL		 1839 cm_node->tcp_cntxt.rcv_nxt++;
1840 cleanup_retrans_entry(cm_node);
6492cdf3 1841 cm_node->state = NES_CM_STATE_CLOSED;
9d5ab133 1842 rem_ref_cm_node(cm_node->cm_core, cm_node);
6492cdf3
FL		 1843 break;
1844 case NES_CM_STATE_TSA:
1845 default:
1846 nes_debug(NES_DBG_CM, "Error Rcvd FIN for node-%p state = %d\n",
1847 cm_node, cm_node->state);
6492cdf3 1848 break;
3c2d774c 1849 }
6492cdf3 1850}
3c2d774c 1851
3c2d774c 1852
6492cdf3
FL		 1853static void handle_rst_pkt(struct nes_cm_node *cm_node, struct sk_buff *skb,
1854 struct tcphdr *tcph)
1855{
3c2d774c 1856
6492cdf3
FL		 1857 int reset = 0; /* whether to send reset in case of err.. */
1858 atomic_inc(&cm_resets_recvd);
1859 nes_debug(NES_DBG_CM, "Received Reset, cm_node = %p, state = %u."
1860 " refcnt=%d\n", cm_node, cm_node->state,
1861 atomic_read(&cm_node->ref_count));
1862 cleanup_retrans_entry(cm_node);
1863 switch (cm_node->state) {
1864 case NES_CM_STATE_SYN_SENT:
1865 case NES_CM_STATE_MPAREQ_SENT:
1866 nes_debug(NES_DBG_CM, "%s[%u] create abort for cm_node=%p "
1867 "listener=%p state=%d\n", __func__, __LINE__, cm_node,
1868 cm_node->listener, cm_node->state);
615eb715
TN		 1869 switch (cm_node->mpa_frame_rev) {
1870 case IETF_MPA_V2:
1871 cm_node->mpa_frame_rev = IETF_MPA_V1;
1872 /* send a syn and goto syn sent state */
1873 cm_node->state = NES_CM_STATE_SYN_SENT;
1874 if (send_syn(cm_node, 0, NULL)) {
1875 active_open_err(cm_node, skb, reset);
1876 }
1877 break;
1878 case IETF_MPA_V1:
1879 default:
1880 active_open_err(cm_node, skb, reset);
1881 break;
1882 }
6492cdf3 1883 break;
183ecfa3 1884 case NES_CM_STATE_MPAREQ_RCVD:
4d8d6389 1885 atomic_inc(&cm_node->passive_state);
183ecfa3
FL		 1886 dev_kfree_skb_any(skb);
1887 break;
6492cdf3
FL		 1888 case NES_CM_STATE_ESTABLISHED:
1889 case NES_CM_STATE_SYN_RCVD:
1890 case NES_CM_STATE_LISTENING:
1891 nes_debug(NES_DBG_CM, "Bad state %s[%u]\n", __func__, __LINE__);
1892 passive_open_err(cm_node, skb, reset);
1893 break;
1894 case NES_CM_STATE_TSA:
183ecfa3
FL		 1895 active_open_err(cm_node, skb, reset);
1896 break;
1897 case NES_CM_STATE_CLOSED:
183ecfa3
FL		 1898 drop_packet(skb);
1899 break;
dae58728 1900 case NES_CM_STATE_FIN_WAIT2:
68237a0f 1901 case NES_CM_STATE_FIN_WAIT1:
109d67e4
FL		 1902 case NES_CM_STATE_LAST_ACK:
1903 cm_node->cm_id->rem_ref(cm_node->cm_id);
9d5ab133 1904 case NES_CM_STATE_TIME_WAIT:
9d5ab133
FL		 1905 cm_node->state = NES_CM_STATE_CLOSED;
1906 rem_ref_cm_node(cm_node->cm_core, cm_node);
1907 drop_packet(skb);
1908 break;
6492cdf3 1909 default:
183ecfa3 1910 drop_packet(skb);
6492cdf3
FL		 1911 break;
1912 }
1913}
3c2d774c 1914
9d5ab133
FL		 1915
1916static void handle_rcv_mpa(struct nes_cm_node *cm_node, struct sk_buff *skb)
6492cdf3 1917{
615eb715 1918 int ret = 0;
6492cdf3
FL		 1919 int datasize = skb->len;
1920 u8 *dataloc = skb->data;
9d5ab133
FL		 1921
1922 enum nes_cm_event_type type = NES_CM_EVENT_UNKNOWN;
615eb715
TN		 1923 u32 res_type;
1924
9d5ab133
FL		 1925 ret = parse_mpa(cm_node, dataloc, &res_type, datasize);
1926 if (ret) {
6492cdf3 1927 nes_debug(NES_DBG_CM, "didn't like MPA Request\n");
9d5ab133 1928 if (cm_node->state == NES_CM_STATE_MPAREQ_SENT) {
6492cdf3 1929 nes_debug(NES_DBG_CM, "%s[%u] create abort for "
615eb715
TN		 1930 "cm_node=%p listener=%p state=%d\n", __func__,
1931 __LINE__, cm_node, cm_node->listener,
1932 cm_node->state);
6492cdf3
FL		 1933 active_open_err(cm_node, skb, 1);
1934 } else {
1935 passive_open_err(cm_node, skb, 1);
3c2d774c 1936 }
9d5ab133
FL		 1937 return;
1938 }
1939
1940 switch (cm_node->state) {
1941 case NES_CM_STATE_ESTABLISHED:
615eb715 1942 if (res_type == NES_MPA_REQUEST_REJECT)
9d5ab133 1943 /*BIG problem as we are receiving the MPA.. So should
615eb715
TN		 1944 * not be REJECT.. This is Passive Open.. We can
1945 * only receive it Reject for Active Open...*/
9d5ab133 1946 WARN_ON(1);
9d5ab133
FL		 1947 cm_node->state = NES_CM_STATE_MPAREQ_RCVD;
1948 type = NES_CM_EVENT_MPA_REQ;
1949 atomic_set(&cm_node->passive_state,
615eb715 1950 NES_PASSIVE_STATE_INDICATED);
9d5ab133
FL		 1951 break;
1952 case NES_CM_STATE_MPAREQ_SENT:
109d67e4 1953 cleanup_retrans_entry(cm_node);
9d5ab133
FL		 1954 if (res_type == NES_MPA_REQUEST_REJECT) {
1955 type = NES_CM_EVENT_MPA_REJECT;
1956 cm_node->state = NES_CM_STATE_MPAREJ_RCVD;
1957 } else {
1958 type = NES_CM_EVENT_CONNECTED;
6492cdf3 1959 cm_node->state = NES_CM_STATE_TSA;
9d5ab133 1960 }
6492cdf3 1961
9d5ab133
FL		 1962 break;
1963 default:
1964 WARN_ON(1);
1965 break;
6492cdf3 1966 }
9d5ab133
FL		 1967 dev_kfree_skb_any(skb);
1968 create_event(cm_node, type);
6492cdf3
FL		 1969}
1970
1971static void indicate_pkt_err(struct nes_cm_node *cm_node, struct sk_buff *skb)
1972{
1973 switch (cm_node->state) {
1974 case NES_CM_STATE_SYN_SENT:
1975 case NES_CM_STATE_MPAREQ_SENT:
1976 nes_debug(NES_DBG_CM, "%s[%u] create abort for cm_node=%p "
615eb715
TN		 1977 "listener=%p state=%d\n", __func__, __LINE__, cm_node,
1978 cm_node->listener, cm_node->state);
6492cdf3
FL		 1979 active_open_err(cm_node, skb, 1);
1980 break;
1981 case NES_CM_STATE_ESTABLISHED:
1982 case NES_CM_STATE_SYN_RCVD:
1983 passive_open_err(cm_node, skb, 1);
1984 break;
1985 case NES_CM_STATE_TSA:
1986 default:
1987 drop_packet(skb);
3c2d774c 1988 }
6492cdf3
FL		 1989}
1990
1991static int check_syn(struct nes_cm_node *cm_node, struct tcphdr *tcph,
615eb715 1992 struct sk_buff *skb)
6492cdf3
FL		 1993{
1994 int err;
1995
615eb715 1996 err = ((ntohl(tcph->ack_seq) == cm_node->tcp_cntxt.loc_seq_num)) ? 0 : 1;
6492cdf3
FL		 1997 if (err)
1998 active_open_err(cm_node, skb, 1);
1999
2000 return err;
2001}
2002
2003static int check_seq(struct nes_cm_node *cm_node, struct tcphdr *tcph,
615eb715 2004 struct sk_buff *skb)
6492cdf3
FL		 2005{
2006 int err = 0;
2007 u32 seq;
2008 u32 ack_seq;
2009 u32 loc_seq_num = cm_node->tcp_cntxt.loc_seq_num;
2010 u32 rcv_nxt = cm_node->tcp_cntxt.rcv_nxt;
2011 u32 rcv_wnd;
615eb715 2012
6492cdf3
FL		 2013 seq = ntohl(tcph->seq);
2014 ack_seq = ntohl(tcph->ack_seq);
2015 rcv_wnd = cm_node->tcp_cntxt.rcv_wnd;
2016 if (ack_seq != loc_seq_num)
2017 err = 1;
615eb715 2018 else if (!between(seq, rcv_nxt, (rcv_nxt + rcv_wnd)))
6492cdf3
FL		 2019 err = 1;
2020 if (err) {
2021 nes_debug(NES_DBG_CM, "%s[%u] create abort for cm_node=%p "
615eb715
TN		 2022 "listener=%p state=%d\n", __func__, __LINE__, cm_node,
2023 cm_node->listener, cm_node->state);
6492cdf3
FL		 2024 indicate_pkt_err(cm_node, skb);
2025 nes_debug(NES_DBG_CM, "seq ERROR cm_node =%p seq=0x%08X "
615eb715
TN		 2026 "rcv_nxt=0x%08X rcv_wnd=0x%x\n", cm_node, seq, rcv_nxt,
2027 rcv_wnd);
6492cdf3
FL		 2028 }
2029 return err;
2030}
2031
2032/*
2033 * handle_syn_pkt() is for Passive node. The syn packet is received when a node
2034 * is created with a listener or it may comein as rexmitted packet which in
2035 * that case will be just dropped.
2036 */
6492cdf3 2037static void handle_syn_pkt(struct nes_cm_node *cm_node, struct sk_buff *skb,
615eb715 2038 struct tcphdr *tcph)
6492cdf3
FL		 2039{
2040 int ret;
2041 u32 inc_sequence;
2042 int optionsize;
3c2d774c
GS		 2043
2044 optionsize = (tcph->doff << 2) - sizeof(struct tcphdr);
abb77256 2045 skb_trim(skb, 0);
6492cdf3 2046 inc_sequence = ntohl(tcph->seq);
3c2d774c 2047
6492cdf3
FL		 2048 switch (cm_node->state) {
2049 case NES_CM_STATE_SYN_SENT:
2050 case NES_CM_STATE_MPAREQ_SENT:
2051 /* Rcvd syn on active open connection*/
2052 active_open_err(cm_node, skb, 1);
2053 break;
2054 case NES_CM_STATE_LISTENING:
2055 /* Passive OPEN */
6492cdf3 2056 if (atomic_read(&cm_node->listener->pend_accepts_cnt) >
615eb715 2057 cm_node->listener->backlog) {
6492cdf3 2058 nes_debug(NES_DBG_CM, "drop syn due to backlog "
615eb715 2059 "pressure \n");
6492cdf3
FL		 2060 cm_backlog_drops++;
2061 passive_open_err(cm_node, skb, 0);
2062 break;
2063 }
2064 ret = handle_tcp_options(cm_node, tcph, skb, optionsize,
615eb715 2065 1);
6492cdf3
FL		 2066 if (ret) {
2067 passive_open_err(cm_node, skb, 0);
2068 /* drop pkt */
2069 break;
2070 }
2071 cm_node->tcp_cntxt.rcv_nxt = inc_sequence + 1;
2072 BUG_ON(cm_node->send_entry);
9d5ab133
FL		 2073 cm_node->accept_pend = 1;
2074 atomic_inc(&cm_node->listener->pend_accepts_cnt);
2075
6492cdf3
FL		 2076 cm_node->state = NES_CM_STATE_SYN_RCVD;
2077 send_syn(cm_node, 1, skb);
2078 break;
abb77256
FL		 2079 case NES_CM_STATE_CLOSED:
2080 cleanup_retrans_entry(cm_node);
886f98a3 2081 add_ref_cm_node(cm_node);
abb77256
FL		 2082 send_reset(cm_node, skb);
2083 break;
6492cdf3
FL		 2084 case NES_CM_STATE_TSA:
2085 case NES_CM_STATE_ESTABLISHED:
2086 case NES_CM_STATE_FIN_WAIT1:
2087 case NES_CM_STATE_FIN_WAIT2:
2088 case NES_CM_STATE_MPAREQ_RCVD:
2089 case NES_CM_STATE_LAST_ACK:
2090 case NES_CM_STATE_CLOSING:
2091 case NES_CM_STATE_UNKNOWN:
6492cdf3
FL		 2092 default:
2093 drop_packet(skb);
2094 break;
2095 }
2096}
2097
2098static void handle_synack_pkt(struct nes_cm_node *cm_node, struct sk_buff *skb,
615eb715 2099 struct tcphdr *tcph)
6492cdf3 2100{
6492cdf3
FL		 2101 int ret;
2102 u32 inc_sequence;
2103 int optionsize;
2104
2105 optionsize = (tcph->doff << 2) - sizeof(struct tcphdr);
abb77256 2106 skb_trim(skb, 0);
6492cdf3
FL		 2107 inc_sequence = ntohl(tcph->seq);
2108 switch (cm_node->state) {
2109 case NES_CM_STATE_SYN_SENT:
9d5ab133 2110 cleanup_retrans_entry(cm_node);
6492cdf3
FL		 2111 /* active open */
2112 if (check_syn(cm_node, tcph, skb))
2113 return;
2114 cm_node->tcp_cntxt.rem_ack_num = ntohl(tcph->ack_seq);
2115 /* setup options */
2116 ret = handle_tcp_options(cm_node, tcph, skb, optionsize, 0);
2117 if (ret) {
2118 nes_debug(NES_DBG_CM, "cm_node=%p tcp_options failed\n",
615eb715 2119 cm_node);
6492cdf3
FL		 2120 break;
2121 }
2122 cleanup_retrans_entry(cm_node);
2123 cm_node->tcp_cntxt.rcv_nxt = inc_sequence + 1;
2124 send_mpa_request(cm_node, skb);
2125 cm_node->state = NES_CM_STATE_MPAREQ_SENT;
2126 break;
2127 case NES_CM_STATE_MPAREQ_RCVD:
2128 /* passive open, so should not be here */
2129 passive_open_err(cm_node, skb, 1);
2130 break;
abb77256 2131 case NES_CM_STATE_LISTENING:
886f98a3
FL		 2132 cm_node->tcp_cntxt.loc_seq_num = ntohl(tcph->ack_seq);
2133 cleanup_retrans_entry(cm_node);
2134 cm_node->state = NES_CM_STATE_CLOSED;
2135 send_reset(cm_node, skb);
2136 break;
abb77256
FL		 2137 case NES_CM_STATE_CLOSED:
2138 cm_node->tcp_cntxt.loc_seq_num = ntohl(tcph->ack_seq);
2139 cleanup_retrans_entry(cm_node);
886f98a3 2140 add_ref_cm_node(cm_node);
abb77256
FL		 2141 send_reset(cm_node, skb);
2142 break;
6492cdf3
FL		 2143 case NES_CM_STATE_ESTABLISHED:
2144 case NES_CM_STATE_FIN_WAIT1:
2145 case NES_CM_STATE_FIN_WAIT2:
2146 case NES_CM_STATE_LAST_ACK:
2147 case NES_CM_STATE_TSA:
2148 case NES_CM_STATE_CLOSING:
2149 case NES_CM_STATE_UNKNOWN:
6492cdf3
FL		 2150 case NES_CM_STATE_MPAREQ_SENT:
2151 default:
2152 drop_packet(skb);
2153 break;
2154 }
2155}
3c2d774c 2156
109d67e4 2157static int handle_ack_pkt(struct nes_cm_node *cm_node, struct sk_buff *skb,
615eb715 2158 struct tcphdr *tcph)
6492cdf3
FL		 2159{
2160 int datasize = 0;
2161 u32 inc_sequence;
109d67e4 2162 int ret = 0;
abb77256 2163 int optionsize;
615eb715 2164
abb77256 2165 optionsize = (tcph->doff << 2) - sizeof(struct tcphdr);
abb77256 2166
6492cdf3 2167 if (check_seq(cm_node, tcph, skb))
109d67e4 2168 return -EINVAL;
6492cdf3
FL		 2169
2170 skb_pull(skb, tcph->doff << 2);
3c2d774c 2171 inc_sequence = ntohl(tcph->seq);
6492cdf3 2172 datasize = skb->len;
6492cdf3
FL		 2173 switch (cm_node->state) {
2174 case NES_CM_STATE_SYN_RCVD:
2175 /* Passive OPEN */
109d67e4 2176 cleanup_retrans_entry(cm_node);
abb77256
FL		 2177 ret = handle_tcp_options(cm_node, tcph, skb, optionsize, 1);
2178 if (ret)
2179 break;
6492cdf3
FL		 2180 cm_node->tcp_cntxt.rem_ack_num = ntohl(tcph->ack_seq);
2181 cm_node->state = NES_CM_STATE_ESTABLISHED;
2182 if (datasize) {
2183 cm_node->tcp_cntxt.rcv_nxt = inc_sequence + datasize;
230da36a 2184 nes_get_remote_addr(cm_node);
9d5ab133 2185 handle_rcv_mpa(cm_node, skb);
615eb715 2186 } else { /* rcvd ACK only */
6492cdf3 2187 dev_kfree_skb_any(skb);
615eb715 2188 }
6492cdf3
FL		 2189 break;
2190 case NES_CM_STATE_ESTABLISHED:
2191 /* Passive OPEN */
9d5ab133 2192 cleanup_retrans_entry(cm_node);
6492cdf3
FL		 2193 if (datasize) {
2194 cm_node->tcp_cntxt.rcv_nxt = inc_sequence + datasize;
9d5ab133 2195 handle_rcv_mpa(cm_node, skb);
615eb715 2196 } else {
6492cdf3 2197 drop_packet(skb);
615eb715 2198 }
6492cdf3
FL		 2199 break;
2200 case NES_CM_STATE_MPAREQ_SENT:
2201 cm_node->tcp_cntxt.rem_ack_num = ntohl(tcph->ack_seq);
2202 if (datasize) {
2203 cm_node->tcp_cntxt.rcv_nxt = inc_sequence + datasize;
9d5ab133 2204 handle_rcv_mpa(cm_node, skb);
615eb715 2205 } else { /* Could be just an ack pkt.. */
6492cdf3 2206 dev_kfree_skb_any(skb);
615eb715 2207 }
6492cdf3 2208 break;
abb77256 2209 case NES_CM_STATE_LISTENING:
886f98a3
FL		 2210 cleanup_retrans_entry(cm_node);
2211 cm_node->state = NES_CM_STATE_CLOSED;
2212 send_reset(cm_node, skb);
2213 break;
abb77256
FL		 2214 case NES_CM_STATE_CLOSED:
2215 cleanup_retrans_entry(cm_node);
886f98a3 2216 add_ref_cm_node(cm_node);
abb77256
FL		 2217 send_reset(cm_node, skb);
2218 break;
9d5ab133 2219 case NES_CM_STATE_LAST_ACK:
109d67e4 2220 case NES_CM_STATE_CLOSING:
9d5ab133
FL		 2221 cleanup_retrans_entry(cm_node);
2222 cm_node->state = NES_CM_STATE_CLOSED;
2223 cm_node->cm_id->rem_ref(cm_node->cm_id);
9d5ab133
FL		 2224 rem_ref_cm_node(cm_node->cm_core, cm_node);
2225 drop_packet(skb);
2226 break;
6492cdf3 2227 case NES_CM_STATE_FIN_WAIT1:
9d5ab133
FL		 2228 cleanup_retrans_entry(cm_node);
2229 drop_packet(skb);
2230 cm_node->state = NES_CM_STATE_FIN_WAIT2;
2231 break;
6492cdf3
FL		 2232 case NES_CM_STATE_SYN_SENT:
2233 case NES_CM_STATE_FIN_WAIT2:
2234 case NES_CM_STATE_TSA:
6492cdf3 2235 case NES_CM_STATE_MPAREQ_RCVD:
6492cdf3
FL		 2236 case NES_CM_STATE_UNKNOWN:
2237 default:
109d67e4 2238 cleanup_retrans_entry(cm_node);
6492cdf3
FL		 2239 drop_packet(skb);
2240 break;
3c2d774c 2241 }
109d67e4 2242 return ret;
6492cdf3 2243}
3c2d774c 2244
3c2d774c
GS		 2245
2246
6492cdf3 2247static int handle_tcp_options(struct nes_cm_node *cm_node, struct tcphdr *tcph,
615eb715 2248 struct sk_buff *skb, int optionsize, int passive)
6492cdf3
FL		 2249{
2250 u8 *optionsloc = (u8 *)&tcph[1];
615eb715 2251
3c2d774c 2252 if (optionsize) {
6492cdf3 2253 if (process_options(cm_node, optionsloc, optionsize,
615eb715 2254 (u32)tcph->syn)) {
6492cdf3 2255 nes_debug(NES_DBG_CM, "%s: Node %p, Sending RESET\n",
615eb715 2256 __func__, cm_node);
6492cdf3 2257 if (passive)
abb77256 2258 passive_open_err(cm_node, skb, 1);
6492cdf3 2259 else
abb77256 2260 active_open_err(cm_node, skb, 1);
6492cdf3 2261 return 1;
3c2d774c 2262 }
6492cdf3 2263 }
3c2d774c
GS		 2264
2265 cm_node->tcp_cntxt.snd_wnd = ntohs(tcph->window) <<
615eb715 2266 cm_node->tcp_cntxt.snd_wscale;
3c2d774c 2267
6492cdf3 2268 if (cm_node->tcp_cntxt.snd_wnd > cm_node->tcp_cntxt.max_snd_wnd)
3c2d774c 2269 cm_node->tcp_cntxt.max_snd_wnd = cm_node->tcp_cntxt.snd_wnd;
6492cdf3
FL		 2270 return 0;
2271}
3c2d774c 2272
6492cdf3
FL		 2273/*
2274 * active_open_err() will send reset() if flag set..
2275 * It will also send ABORT event.
2276 */
6492cdf3 2277static void active_open_err(struct nes_cm_node *cm_node, struct sk_buff *skb,
615eb715 2278 int reset)
6492cdf3
FL		 2279{
2280 cleanup_retrans_entry(cm_node);
2281 if (reset) {
2282 nes_debug(NES_DBG_CM, "ERROR active err called for cm_node=%p, "
615eb715 2283 "state=%d\n", cm_node, cm_node->state);
6492cdf3
FL		 2284 add_ref_cm_node(cm_node);
2285 send_reset(cm_node, skb);
615eb715 2286 } else {
6492cdf3 2287 dev_kfree_skb_any(skb);
615eb715 2288 }
3c2d774c 2289
6492cdf3
FL		 2290 cm_node->state = NES_CM_STATE_CLOSED;
2291 create_event(cm_node, NES_CM_EVENT_ABORTED);
2292}
3c2d774c 2293
6492cdf3
FL		 2294/*
2295 * passive_open_err() will either do a reset() or will free up the skb and
2296 * remove the cm_node.
2297 */
6492cdf3 2298static void passive_open_err(struct nes_cm_node *cm_node, struct sk_buff *skb,
615eb715 2299 int reset)
6492cdf3
FL		 2300{
2301 cleanup_retrans_entry(cm_node);
2302 cm_node->state = NES_CM_STATE_CLOSED;
2303 if (reset) {
2304 nes_debug(NES_DBG_CM, "passive_open_err sending RST for "
615eb715 2305 "cm_node=%p state =%d\n", cm_node, cm_node->state);
6492cdf3
FL		 2306 send_reset(cm_node, skb);
2307 } else {
2308 dev_kfree_skb_any(skb);
2309 rem_ref_cm_node(cm_node->cm_core, cm_node);
3c2d774c 2310 }
6492cdf3 2311}
3c2d774c 2312
6492cdf3
FL		 2313/*
2314 * free_retrans_entry() routines assumes that the retrans_list_lock has
2315 * been acquired before calling.
2316 */
2317static void free_retrans_entry(struct nes_cm_node *cm_node)
2318{
2319 struct nes_timer_entry *send_entry;
615eb715 2320
6492cdf3
FL		 2321 send_entry = cm_node->send_entry;
2322 if (send_entry) {
2323 cm_node->send_entry = NULL;
2324 dev_kfree_skb_any(send_entry->skb);
2325 kfree(send_entry);
2326 rem_ref_cm_node(cm_node->cm_core, cm_node);
3c2d774c 2327 }
6492cdf3 2328}
3c2d774c 2329
6492cdf3
FL		 2330static void cleanup_retrans_entry(struct nes_cm_node *cm_node)
2331{
2332 unsigned long flags;
3c2d774c 2333
6492cdf3
FL		 2334 spin_lock_irqsave(&cm_node->retrans_list_lock, flags);
2335 free_retrans_entry(cm_node);
2336 spin_unlock_irqrestore(&cm_node->retrans_list_lock, flags);
3c2d774c
GS		 2337}
2338
6492cdf3
FL		 2339/**
2340 * process_packet
2341 * Returns skb if to be freed, else it will return NULL if already used..
2342 */
2343static void process_packet(struct nes_cm_node *cm_node, struct sk_buff *skb,
615eb715 2344 struct nes_cm_core *cm_core)
6492cdf3 2345{
615eb715 2346 enum nes_tcpip_pkt_type pkt_type = NES_PKT_TYPE_UNKNOWN;
6492cdf3 2347 struct tcphdr *tcph = tcp_hdr(skb);
615eb715 2348 u32 fin_set = 0;
109d67e4 2349 int ret = 0;
615eb715 2350
6492cdf3
FL		 2351 skb_pull(skb, ip_hdr(skb)->ihl << 2);
2352
2353 nes_debug(NES_DBG_CM, "process_packet: cm_node=%p state =%d syn=%d "
615eb715
TN		 2354 "ack=%d rst=%d fin=%d\n", cm_node, cm_node->state, tcph->syn,
2355 tcph->ack, tcph->rst, tcph->fin);
6492cdf3 2356
615eb715 2357 if (tcph->rst) {
6492cdf3 2358 pkt_type = NES_PKT_TYPE_RST;
615eb715 2359 } else if (tcph->syn) {
6492cdf3
FL		 2360 pkt_type = NES_PKT_TYPE_SYN;
2361 if (tcph->ack)
2362 pkt_type = NES_PKT_TYPE_SYNACK;
615eb715 2363 } else if (tcph->ack) {
6492cdf3 2364 pkt_type = NES_PKT_TYPE_ACK;
615eb715 2365 }
9d5ab133
FL		 2366 if (tcph->fin)
2367 fin_set = 1;
6492cdf3
FL		 2368
2369 switch (pkt_type) {
2370 case NES_PKT_TYPE_SYN:
2371 handle_syn_pkt(cm_node, skb, tcph);
2372 break;
2373 case NES_PKT_TYPE_SYNACK:
2374 handle_synack_pkt(cm_node, skb, tcph);
2375 break;
2376 case NES_PKT_TYPE_ACK:
109d67e4
FL		 2377 ret = handle_ack_pkt(cm_node, skb, tcph);
2378 if (fin_set && !ret)
9d5ab133 2379 handle_fin_pkt(cm_node);
6492cdf3
FL		 2380 break;
2381 case NES_PKT_TYPE_RST:
2382 handle_rst_pkt(cm_node, skb, tcph);
2383 break;
6492cdf3 2384 default:
109d67e4 2385 if ((fin_set) && (!check_seq(cm_node, tcph, skb)))
9d5ab133 2386 handle_fin_pkt(cm_node);
109d67e4 2387 drop_packet(skb);
6492cdf3
FL		 2388 break;
2389 }
2390}
3c2d774c
GS		 2391
2392/**
2393 * mini_cm_listen - create a listen node with params
2394 */
2395static struct nes_cm_listener *mini_cm_listen(struct nes_cm_core *cm_core,
5647263c 2396 struct nes_vnic *nesvnic, struct nes_cm_info *cm_info)
3c2d774c
GS		 2397{
2398 struct nes_cm_listener *listener;
5647263c
TN		 2399 struct iwpm_dev_data pm_reg_msg;
2400 struct iwpm_sa_data pm_msg;
3c2d774c 2401 unsigned long flags;
5647263c 2402 int iwpm_err = 0;
3c2d774c
GS		 2403
2404 nes_debug(NES_DBG_CM, "Search for 0x%08x : 0x%04x\n",
615eb715 2405 cm_info->loc_addr, cm_info->loc_port);
3c2d774c
GS		 2406
2407 /* cannot have multiple matching listeners */
5647263c
TN		 2408 listener = find_listener(cm_core, cm_info->loc_addr, cm_info->loc_port,
2409 NES_CM_LISTENER_EITHER_STATE, 1);
2410
3c2d774c
GS		 2411 if (listener && listener->listener_state == NES_CM_LISTENER_ACTIVE_STATE) {
2412 /* find automatically incs ref count ??? */
2413 atomic_dec(&listener->ref_count);
2414 nes_debug(NES_DBG_CM, "Not creating listener since it already exists\n");
2415 return NULL;
2416 }
2417
2418 if (!listener) {
5647263c
TN		 2419 nes_form_reg_msg(nesvnic, &pm_reg_msg);
2420 iwpm_err = iwpm_register_pid(&pm_reg_msg, RDMA_NL_NES);
2421 if (iwpm_err) {
2422 nes_debug(NES_DBG_NLMSG,
2423 "Port Mapper reg pid fail (err = %d).\n", iwpm_err);
2424 }
2425 if (iwpm_valid_pid() && !iwpm_err) {
2426 nes_form_pm_msg(cm_info, &pm_msg);
2427 iwpm_err = iwpm_add_mapping(&pm_msg, RDMA_NL_NES);
2428 if (iwpm_err)
2429 nes_debug(NES_DBG_NLMSG,
2430 "Port Mapper query fail (err = %d).\n", iwpm_err);
2431 else
2432 nes_record_pm_msg(cm_info, &pm_msg);
2433 }
2434
3c2d774c
GS		 2435 /* create a CM listen node (1/2 node to compare incoming traffic to) */
2436 listener = kzalloc(sizeof(*listener), GFP_ATOMIC);
2437 if (!listener) {
2438 nes_debug(NES_DBG_CM, "Not creating listener memory allocation failed\n");
2439 return NULL;
2440 }
2441
5647263c
TN		 2442 listener->loc_addr = cm_info->loc_addr;
2443 listener->loc_port = cm_info->loc_port;
2444 listener->mapped_loc_addr = cm_info->mapped_loc_addr;
2445 listener->mapped_loc_port = cm_info->mapped_loc_port;
3c2d774c
GS		 2446 listener->reused_node = 0;
2447
2448 atomic_set(&listener->ref_count, 1);
2449 }
2450 /* pasive case */
2451 /* find already inc'ed the ref count */
2452 else {
2453 listener->reused_node = 1;
2454 }
2455
2456 listener->cm_id = cm_info->cm_id;
2457 atomic_set(&listener->pend_accepts_cnt, 0);
2458 listener->cm_core = cm_core;
2459 listener->nesvnic = nesvnic;
2460 atomic_inc(&cm_core->node_cnt);
3c2d774c 2461
3c2d774c
GS		 2462 listener->conn_type = cm_info->conn_type;
2463 listener->backlog = cm_info->backlog;
2464 listener->listener_state = NES_CM_LISTENER_ACTIVE_STATE;
2465
2466 if (!listener->reused_node) {
2467 spin_lock_irqsave(&cm_core->listen_list_lock, flags);
2468 list_add(&listener->list, &cm_core->listen_list.list);
2469 spin_unlock_irqrestore(&cm_core->listen_list_lock, flags);
2470 atomic_inc(&cm_core->listen_node_cnt);
2471 }
2472
2473 nes_debug(NES_DBG_CM, "Api - listen(): addr=0x%08X, port=0x%04x,"
615eb715
TN		 2474 " listener = %p, backlog = %d, cm_id = %p.\n",
2475 cm_info->loc_addr, cm_info->loc_port,
2476 listener, listener->backlog, listener->cm_id);
3c2d774c
GS		 2477
2478 return listener;
2479}
2480
2481
2482/**
2483 * mini_cm_connect - make a connection node with params
2484 */
54c86a8c 2485static struct nes_cm_node *mini_cm_connect(struct nes_cm_core *cm_core,
615eb715
TN		 2486 struct nes_vnic *nesvnic, u16 private_data_len,
2487 void *private_data, struct nes_cm_info *cm_info)
3c2d774c
GS		 2488{
2489 int ret = 0;
2490 struct nes_cm_node *cm_node;
2491 struct nes_cm_listener *loopbackremotelistener;
2492 struct nes_cm_node *loopbackremotenode;
2493 struct nes_cm_info loopback_cm_info;
615eb715 2494 u8 *start_buff;
3c2d774c
GS		 2495
2496 /* create a CM connection node */
2497 cm_node = make_cm_node(cm_core, nesvnic, cm_info, NULL);
2498 if (!cm_node)
2499 return NULL;
2500
7495ab68 2501 /* set our node side to client (active) side */
3c2d774c
GS		 2502 cm_node->tcp_cntxt.client = 1;
2503 cm_node->tcp_cntxt.rcv_wscale = NES_CM_DEFAULT_RCV_WND_SCALE;
2504
2505 if (cm_info->loc_addr == cm_info->rem_addr) {
6492cdf3 2506 loopbackremotelistener = find_listener(cm_core,
5647263c
TN		 2507 cm_node->mapped_loc_addr, cm_node->mapped_rem_port,
2508 NES_CM_LISTENER_ACTIVE_STATE, 0);
3c2d774c
GS		 2509 if (loopbackremotelistener == NULL) {
2510 create_event(cm_node, NES_CM_EVENT_ABORTED);
2511 } else {
3c2d774c
GS		 2512 loopback_cm_info = *cm_info;
2513 loopback_cm_info.loc_port = cm_info->rem_port;
2514 loopback_cm_info.rem_port = cm_info->loc_port;
5647263c
TN		 2515 loopback_cm_info.mapped_loc_port =
2516 cm_info->mapped_rem_port;
2517 loopback_cm_info.mapped_rem_port =
2518 cm_info->mapped_loc_port;
3c2d774c 2519 loopback_cm_info.cm_id = loopbackremotelistener->cm_id;
6492cdf3 2520 loopbackremotenode = make_cm_node(cm_core, nesvnic,
615eb715 2521 &loopback_cm_info, loopbackremotelistener);
79fc3d74
FL		 2522 if (!loopbackremotenode) {
2523 rem_ref_cm_node(cm_node->cm_core, cm_node);
2524 return NULL;
2525 }
2526 atomic_inc(&cm_loopbacks);
3c2d774c 2527 loopbackremotenode->loopbackpartner = cm_node;
6492cdf3
FL		 2528 loopbackremotenode->tcp_cntxt.rcv_wscale =
2529 NES_CM_DEFAULT_RCV_WND_SCALE;
3c2d774c 2530 cm_node->loopbackpartner = loopbackremotenode;
6492cdf3 2531 memcpy(loopbackremotenode->mpa_frame_buf, private_data,
615eb715 2532 private_data_len);
6492cdf3 2533 loopbackremotenode->mpa_frame_size = private_data_len;
3c2d774c 2534
6492cdf3
FL		 2535 /* we are done handling this state. */
2536 /* set node to a TSA state */
3c2d774c 2537 cm_node->state = NES_CM_STATE_TSA;
6492cdf3
FL		 2538 cm_node->tcp_cntxt.rcv_nxt =
2539 loopbackremotenode->tcp_cntxt.loc_seq_num;
2540 loopbackremotenode->tcp_cntxt.rcv_nxt =
2541 cm_node->tcp_cntxt.loc_seq_num;
2542 cm_node->tcp_cntxt.max_snd_wnd =
2543 loopbackremotenode->tcp_cntxt.rcv_wnd;
2544 loopbackremotenode->tcp_cntxt.max_snd_wnd =
2545 cm_node->tcp_cntxt.rcv_wnd;
2546 cm_node->tcp_cntxt.snd_wnd =
2547 loopbackremotenode->tcp_cntxt.rcv_wnd;
2548 loopbackremotenode->tcp_cntxt.snd_wnd =
2549 cm_node->tcp_cntxt.rcv_wnd;
2550 cm_node->tcp_cntxt.snd_wscale =
2551 loopbackremotenode->tcp_cntxt.rcv_wscale;
2552 loopbackremotenode->tcp_cntxt.snd_wscale =
2553 cm_node->tcp_cntxt.rcv_wscale;
9d5ab133 2554 loopbackremotenode->state = NES_CM_STATE_MPAREQ_RCVD;
3c2d774c
GS		 2555 create_event(loopbackremotenode, NES_CM_EVENT_MPA_REQ);
2556 }
2557 return cm_node;
2558 }
2559
615eb715
TN		 2560 start_buff = &cm_node->mpa_frame_buf[0] + sizeof(struct ietf_mpa_v2);
2561 cm_node->mpa_frame_size = private_data_len;
6492cdf3 2562
615eb715 2563 memcpy(start_buff, private_data, private_data_len);
3c2d774c
GS		 2564
2565 /* send a syn and goto syn sent state */
2566 cm_node->state = NES_CM_STATE_SYN_SENT;
6492cdf3
FL		 2567 ret = send_syn(cm_node, 0, NULL);
2568
2569 if (ret) {
2570 /* error in sending the syn free up the cm_node struct */
2571 nes_debug(NES_DBG_CM, "Api - connect() FAILED: dest "
615eb715
TN		 2572 "addr=0x%08X, port=0x%04x, cm_node=%p, cm_id = %p.\n",
2573 cm_node->rem_addr, cm_node->rem_port, cm_node,
2574 cm_node->cm_id);
6492cdf3
FL		 2575 rem_ref_cm_node(cm_node->cm_core, cm_node);
2576 cm_node = NULL;
2577 }
3c2d774c 2578
615eb715 2579 if (cm_node) {
6492cdf3 2580 nes_debug(NES_DBG_CM, "Api - connect(): dest addr=0x%08X,"
615eb715
TN		 2581 "port=0x%04x, cm_node=%p, cm_id = %p.\n",
2582 cm_node->rem_addr, cm_node->rem_port, cm_node,
2583 cm_node->cm_id);
2584 }
3c2d774c
GS		 2585
2586 return cm_node;
2587}
2588
2589
2590/**
2591 * mini_cm_accept - accept a connection
2592 * This function is never called
2593 */
615eb715 2594static int mini_cm_accept(struct nes_cm_core *cm_core, struct nes_cm_node *cm_node)
3c2d774c
GS		 2595{
2596 return 0;
2597}
2598
2599
2600/**
2601 * mini_cm_reject - reject and teardown a connection
2602 */
615eb715 2603static int mini_cm_reject(struct nes_cm_core *cm_core, struct nes_cm_node *cm_node)
3c2d774c
GS		 2604{
2605 int ret = 0;
9d5ab133 2606 int err = 0;
183ecfa3 2607 int passive_state;
9d5ab133
FL		 2608 struct nes_cm_event event;
2609 struct iw_cm_id *cm_id = cm_node->cm_id;
2610 struct nes_cm_node *loopback = cm_node->loopbackpartner;
3c2d774c 2611
6492cdf3 2612 nes_debug(NES_DBG_CM, "%s cm_node=%p type=%d state=%d\n",
615eb715 2613 __func__, cm_node, cm_node->tcp_cntxt.client, cm_node->state);
3c2d774c 2614
6492cdf3
FL		 2615 if (cm_node->tcp_cntxt.client)
2616 return ret;
2617 cleanup_retrans_entry(cm_node);
3c2d774c 2618
9d5ab133
FL		 2619 if (!loopback) {
2620 passive_state = atomic_add_return(1, &cm_node->passive_state);
2621 if (passive_state == NES_SEND_RESET_EVENT) {
2622 cm_node->state = NES_CM_STATE_CLOSED;
2623 rem_ref_cm_node(cm_core, cm_node);
2624 } else {
c5a7d489
FL		 2625 if (cm_node->state == NES_CM_STATE_LISTENER_DESTROYED) {
2626 rem_ref_cm_node(cm_core, cm_node);
2627 } else {
2628 ret = send_mpa_reject(cm_node);
2629 if (ret) {
2630 cm_node->state = NES_CM_STATE_CLOSED;
2631 err = send_reset(cm_node, NULL);
2632 if (err)
2633 WARN_ON(1);
615eb715 2634 } else {
c5a7d489 2635 cm_id->add_ref(cm_id);
615eb715 2636 }
c5a7d489 2637 }
9d5ab133
FL		 2638 }
2639 } else {
2640 cm_node->cm_id = NULL;
c5a7d489
FL		 2641 if (cm_node->state == NES_CM_STATE_LISTENER_DESTROYED) {
2642 rem_ref_cm_node(cm_core, cm_node);
2643 rem_ref_cm_node(cm_core, loopback);
2644 } else {
2645 event.cm_node = loopback;
2646 event.cm_info.rem_addr = loopback->rem_addr;
2647 event.cm_info.loc_addr = loopback->loc_addr;
2648 event.cm_info.rem_port = loopback->rem_port;
2649 event.cm_info.loc_port = loopback->loc_port;
2650 event.cm_info.cm_id = loopback->cm_id;
2651 cm_event_mpa_reject(&event);
2652 rem_ref_cm_node(cm_core, cm_node);
2653 loopback->state = NES_CM_STATE_CLOSING;
9d5ab133 2654
c5a7d489
FL		 2655 cm_id = loopback->cm_id;
2656 rem_ref_cm_node(cm_core, loopback);
2657 cm_id->rem_ref(cm_id);
2658 }
9d5ab133
FL		 2659 }
2660
3c2d774c
GS		 2661 return ret;
2662}
2663
2664
2665/**
2666 * mini_cm_close
2667 */
1a855fbf 2668static int mini_cm_close(struct nes_cm_core *cm_core, struct nes_cm_node *cm_node)
3c2d774c
GS		 2669{
2670 int ret = 0;
2671
2672 if (!cm_core || !cm_node)
2673 return -EINVAL;
2674
2675 switch (cm_node->state) {
6492cdf3
FL		 2676 case NES_CM_STATE_SYN_RCVD:
2677 case NES_CM_STATE_SYN_SENT:
2678 case NES_CM_STATE_ONE_SIDE_ESTABLISHED:
2679 case NES_CM_STATE_ESTABLISHED:
2680 case NES_CM_STATE_ACCEPTING:
2681 case NES_CM_STATE_MPAREQ_SENT:
2682 case NES_CM_STATE_MPAREQ_RCVD:
2683 cleanup_retrans_entry(cm_node);
2684 send_reset(cm_node, NULL);
2685 break;
2686 case NES_CM_STATE_CLOSE_WAIT:
2687 cm_node->state = NES_CM_STATE_LAST_ACK;
2688 send_fin(cm_node, NULL);
2689 break;
2690 case NES_CM_STATE_FIN_WAIT1:
2691 case NES_CM_STATE_FIN_WAIT2:
2692 case NES_CM_STATE_LAST_ACK:
2693 case NES_CM_STATE_TIME_WAIT:
2694 case NES_CM_STATE_CLOSING:
2695 ret = -1;
2696 break;
2697 case NES_CM_STATE_LISTENING:
886f98a3
FL		 2698 cleanup_retrans_entry(cm_node);
2699 send_reset(cm_node, NULL);
2700 break;
2701 case NES_CM_STATE_MPAREJ_RCVD:
6492cdf3
FL		 2702 case NES_CM_STATE_UNKNOWN:
2703 case NES_CM_STATE_INITED:
2704 case NES_CM_STATE_CLOSED:
c5a7d489 2705 case NES_CM_STATE_LISTENER_DESTROYED:
6492cdf3
FL		 2706 ret = rem_ref_cm_node(cm_core, cm_node);
2707 break;
2708 case NES_CM_STATE_TSA:
2709 if (cm_node->send_entry)
2710 printk(KERN_ERR "ERROR Close got called from STATE_TSA "
615eb715 2711 "send_entry=%p\n", cm_node->send_entry);
6492cdf3
FL		 2712 ret = rem_ref_cm_node(cm_core, cm_node);
2713 break;
3c2d774c 2714 }
3c2d774c
GS		 2715 return ret;
2716}
2717
2718
2719/**
2720 * recv_pkt - recv an ETHERNET packet, and process it through CM
2721 * node state machine
2722 */
4a14f6a7 2723static int mini_cm_recv_pkt(struct nes_cm_core *cm_core,
615eb715 2724 struct nes_vnic *nesvnic, struct sk_buff *skb)
3c2d774c
GS		 2725{
2726 struct nes_cm_node *cm_node = NULL;
2727 struct nes_cm_listener *listener = NULL;
2728 struct iphdr *iph;
2729 struct tcphdr *tcph;
2730 struct nes_cm_info nfo;
4a14f6a7 2731 int skb_handled = 1;
03080e5c 2732 __be32 tmp_daddr, tmp_saddr;
3c2d774c 2733
6492cdf3 2734 if (!skb)
4a14f6a7 2735 return 0;
615eb715 2736 if (skb->len < sizeof(struct iphdr) + sizeof(struct tcphdr))
4a14f6a7 2737 return 0;
3c2d774c
GS		 2738
2739 iph = (struct iphdr *)skb->data;
2740 tcph = (struct tcphdr *)(skb->data + sizeof(struct iphdr));
3c2d774c
GS		 2741
2742 nfo.loc_addr = ntohl(iph->daddr);
2743 nfo.loc_port = ntohs(tcph->dest);
2744 nfo.rem_addr = ntohl(iph->saddr);
2745 nfo.rem_port = ntohs(tcph->source);
2746
5647263c
TN		 2747 /* If port mapper is available these should be mapped address info */
2748 nfo.mapped_loc_addr = ntohl(iph->daddr);
2749 nfo.mapped_loc_port = ntohs(tcph->dest);
2750 nfo.mapped_rem_addr = ntohl(iph->saddr);
2751 nfo.mapped_rem_port = ntohs(tcph->source);
2752
03080e5c
HH		 2753 tmp_daddr = cpu_to_be32(iph->daddr);
2754 tmp_saddr = cpu_to_be32(iph->saddr);
2755
63779436 2756 nes_debug(NES_DBG_CM, "Received packet: dest=%pI4:0x%04X src=%pI4:0x%04X\n",
03080e5c 2757 &tmp_daddr, tcph->dest, &tmp_saddr, tcph->source);
3c2d774c 2758
6492cdf3
FL		 2759 do {
2760 cm_node = find_node(cm_core,
5647263c
TN		 2761 nfo.mapped_rem_port, nfo.mapped_rem_addr,
2762 nfo.mapped_loc_port, nfo.mapped_loc_addr);
3c2d774c 2763
3c2d774c 2764 if (!cm_node) {
6492cdf3
FL		 2765 /* Only type of packet accepted are for */
2766 /* the PASSIVE open (syn only) */
2767 if ((!tcph->syn) || (tcph->ack)) {
4a14f6a7 2768 skb_handled = 0;
6492cdf3
FL		 2769 break;
2770 }
5647263c
TN		 2771 listener = find_listener(cm_core, nfo.mapped_loc_addr,
2772 nfo.mapped_loc_port,
2773 NES_CM_LISTENER_ACTIVE_STATE, 0);
4a14f6a7
FL		 2774 if (!listener) {
2775 nfo.cm_id = NULL;
2776 nfo.conn_type = 0;
2777 nes_debug(NES_DBG_CM, "Unable to find listener for the pkt\n");
2778 skb_handled = 0;
6492cdf3
FL		 2779 break;
2780 }
4a14f6a7
FL		 2781 nfo.cm_id = listener->cm_id;
2782 nfo.conn_type = listener->conn_type;
6492cdf3 2783 cm_node = make_cm_node(cm_core, nesvnic, &nfo,
615eb715 2784 listener);
6492cdf3
FL		 2785 if (!cm_node) {
2786 nes_debug(NES_DBG_CM, "Unable to allocate "
615eb715 2787 "node\n");
6492cdf3 2788 cm_packets_dropped++;
3c2d774c 2789 atomic_dec(&listener->ref_count);
6492cdf3
FL		 2790 dev_kfree_skb_any(skb);
2791 break;
3c2d774c 2792 }
6492cdf3
FL		 2793 if (!tcph->rst && !tcph->fin) {
2794 cm_node->state = NES_CM_STATE_LISTENING;
2795 } else {
2796 cm_packets_dropped++;
2797 rem_ref_cm_node(cm_core, cm_node);
2798 dev_kfree_skb_any(skb);
2799 break;
3c2d774c 2800 }
6492cdf3
FL		 2801 add_ref_cm_node(cm_node);
2802 } else if (cm_node->state == NES_CM_STATE_TSA) {
0f0bee8b
FL		 2803 if (cm_node->nesqp->pau_mode)
2804 nes_queue_mgt_skbs(skb, nesvnic, cm_node->nesqp);
2805 else {
2806 rem_ref_cm_node(cm_core, cm_node);
2807 atomic_inc(&cm_accel_dropped_pkts);
2808 dev_kfree_skb_any(skb);
2809 }
6492cdf3 2810 break;
3c2d774c 2811 }
4a14f6a7
FL		 2812 skb_reset_network_header(skb);
2813 skb_set_transport_header(skb, sizeof(*tcph));
2814 skb->len = ntohs(iph->tot_len);
6492cdf3
FL		 2815 process_packet(cm_node, skb, cm_core);
2816 rem_ref_cm_node(cm_core, cm_node);
2817 } while (0);
4a14f6a7 2818 return skb_handled;
3c2d774c
GS		 2819}
2820
2821
2822/**
2823 * nes_cm_alloc_core - allocate a top level instance of a cm core
2824 */
1a855fbf 2825static struct nes_cm_core *nes_cm_alloc_core(void)
3c2d774c 2826{
3c2d774c 2827 struct nes_cm_core *cm_core;
3c2d774c
GS		 2828
2829 /* setup the CM core */
2830 /* alloc top level core control structure */
2831 cm_core = kzalloc(sizeof(*cm_core), GFP_KERNEL);
2832 if (!cm_core)
2833 return NULL;
2834
2835 INIT_LIST_HEAD(&cm_core->connected_nodes);
2836 init_timer(&cm_core->tcp_timer);
2837 cm_core->tcp_timer.function = nes_cm_timer_tick;
2838
615eb715 2839 cm_core->mtu = NES_CM_DEFAULT_MTU;
3c2d774c
GS		 2840 cm_core->state = NES_CM_STATE_INITED;
2841 cm_core->free_tx_pkt_max = NES_CM_DEFAULT_FREE_PKTS;
2842
3c2d774c
GS		 2843 atomic_set(&cm_core->events_posted, 0);
2844
3c2d774c
GS		 2845 cm_core->api = &nes_cm_api;
2846
2847 spin_lock_init(&cm_core->ht_lock);
2848 spin_lock_init(&cm_core->listen_list_lock);
2849
2850 INIT_LIST_HEAD(&cm_core->listen_list.list);
2851
2852 nes_debug(NES_DBG_CM, "Init CM Core completed -- cm_core=%p\n", cm_core);
2853
2854 nes_debug(NES_DBG_CM, "Enable QUEUE EVENTS\n");
2855 cm_core->event_wq = create_singlethread_workqueue("nesewq");
2856 cm_core->post_event = nes_cm_post_event;
2857 nes_debug(NES_DBG_CM, "Enable QUEUE DISCONNECTS\n");
2858 cm_core->disconn_wq = create_singlethread_workqueue("nesdwq");
2859
2860 print_core(cm_core);
2861 return cm_core;
2862}
2863
2864
2865/**
2866 * mini_cm_dealloc_core - deallocate a top level instance of a cm core
2867 */
1a855fbf 2868static int mini_cm_dealloc_core(struct nes_cm_core *cm_core)
3c2d774c
GS		 2869{
2870 nes_debug(NES_DBG_CM, "De-Alloc CM Core (%p)\n", cm_core);
2871
2872 if (!cm_core)
2873 return -EINVAL;
2874
2875 barrier();
2876
615eb715 2877 if (timer_pending(&cm_core->tcp_timer))
3c2d774c 2878 del_timer(&cm_core->tcp_timer);
3c2d774c
GS		 2879
2880 destroy_workqueue(cm_core->event_wq);
2881 destroy_workqueue(cm_core->disconn_wq);
2882 nes_debug(NES_DBG_CM, "\n");
2883 kfree(cm_core);
2884
2885 return 0;
2886}
2887
2888
2889/**
2890 * mini_cm_get
2891 */
1a855fbf 2892static int mini_cm_get(struct nes_cm_core *cm_core)
3c2d774c
GS		 2893{
2894 return cm_core->state;
2895}
2896
2897
2898/**
2899 * mini_cm_set
2900 */
1a855fbf 2901static int mini_cm_set(struct nes_cm_core *cm_core, u32 type, u32 value)
3c2d774c
GS		 2902{
2903 int ret = 0;
2904
2905 switch (type) {
9d5ab133
FL		 2906 case NES_CM_SET_PKT_SIZE:
2907 cm_core->mtu = value;
2908 break;
2909 case NES_CM_SET_FREE_PKT_Q_SIZE:
2910 cm_core->free_tx_pkt_max = value;
2911 break;
2912 default:
2913 /* unknown set option */
2914 ret = -EINVAL;
3c2d774c
GS		 2915 }
2916
2917 return ret;
2918}
2919
2920
2921/**
2922 * nes_cm_init_tsa_conn setup HW; MPA frames must be
2923 * successfully exchanged when this is called
2924 */
2925static int nes_cm_init_tsa_conn(struct nes_qp *nesqp, struct nes_cm_node *cm_node)
2926{
2927 int ret = 0;
2928
2929 if (!nesqp)
2930 return -EINVAL;
2931
2932 nesqp->nesqp_context->misc |= cpu_to_le32(NES_QPCONTEXT_MISC_IPV4 |
615eb715
TN		 2933 NES_QPCONTEXT_MISC_NO_NAGLE | NES_QPCONTEXT_MISC_DO_NOT_FRAG |
2934 NES_QPCONTEXT_MISC_DROS);
3c2d774c
GS		 2935
2936 if (cm_node->tcp_cntxt.snd_wscale || cm_node->tcp_cntxt.rcv_wscale)
2937 nesqp->nesqp_context->misc |= cpu_to_le32(NES_QPCONTEXT_MISC_WSCALE);
2938
2939 nesqp->nesqp_context->misc2 |= cpu_to_le32(64 << NES_QPCONTEXT_MISC2_TTL_SHIFT);
2940
2941 nesqp->nesqp_context->mss |= cpu_to_le32(((u32)cm_node->tcp_cntxt.mss) << 16);
2942
2943 nesqp->nesqp_context->tcp_state_flow_label |= cpu_to_le32(
615eb715 2944 (u32)NES_QPCONTEXT_TCPSTATE_EST << NES_QPCONTEXT_TCPFLOW_TCP_STATE_SHIFT);
3c2d774c
GS		 2945
2946 nesqp->nesqp_context->pd_index_wscale |= cpu_to_le32(
615eb715
TN		 2947 (cm_node->tcp_cntxt.snd_wscale << NES_QPCONTEXT_PDWSCALE_SND_WSCALE_SHIFT) &
2948 NES_QPCONTEXT_PDWSCALE_SND_WSCALE_MASK);
3c2d774c
GS		 2949
2950 nesqp->nesqp_context->pd_index_wscale |= cpu_to_le32(
615eb715
TN		 2951 (cm_node->tcp_cntxt.rcv_wscale << NES_QPCONTEXT_PDWSCALE_RCV_WSCALE_SHIFT) &
2952 NES_QPCONTEXT_PDWSCALE_RCV_WSCALE_MASK);
3c2d774c
GS		 2953
2954 nesqp->nesqp_context->keepalive = cpu_to_le32(0x80);
2955 nesqp->nesqp_context->ts_recent = 0;
2956 nesqp->nesqp_context->ts_age = 0;
2957 nesqp->nesqp_context->snd_nxt = cpu_to_le32(cm_node->tcp_cntxt.loc_seq_num);
2958 nesqp->nesqp_context->snd_wnd = cpu_to_le32(cm_node->tcp_cntxt.snd_wnd);
2959 nesqp->nesqp_context->rcv_nxt = cpu_to_le32(cm_node->tcp_cntxt.rcv_nxt);
2960 nesqp->nesqp_context->rcv_wnd = cpu_to_le32(cm_node->tcp_cntxt.rcv_wnd <<
615eb715 2961 cm_node->tcp_cntxt.rcv_wscale);
3c2d774c
GS		 2962 nesqp->nesqp_context->snd_max = cpu_to_le32(cm_node->tcp_cntxt.loc_seq_num);
2963 nesqp->nesqp_context->snd_una = cpu_to_le32(cm_node->tcp_cntxt.loc_seq_num);
2964 nesqp->nesqp_context->srtt = 0;
2965 nesqp->nesqp_context->rttvar = cpu_to_le32(0x6);
2966 nesqp->nesqp_context->ssthresh = cpu_to_le32(0x3FFFC000);
615eb715 2967 nesqp->nesqp_context->cwnd = cpu_to_le32(2 * cm_node->tcp_cntxt.mss);
3c2d774c
GS		 2968 nesqp->nesqp_context->snd_wl1 = cpu_to_le32(cm_node->tcp_cntxt.rcv_nxt);
2969 nesqp->nesqp_context->snd_wl2 = cpu_to_le32(cm_node->tcp_cntxt.loc_seq_num);
2970 nesqp->nesqp_context->max_snd_wnd = cpu_to_le32(cm_node->tcp_cntxt.max_snd_wnd);
2971
2972 nes_debug(NES_DBG_CM, "QP%u: rcv_nxt = 0x%08X, snd_nxt = 0x%08X,"
615eb715
TN		 2973 " Setting MSS to %u, PDWscale = 0x%08X, rcv_wnd = %u, context misc = 0x%08X.\n",
2974 nesqp->hwqp.qp_id, le32_to_cpu(nesqp->nesqp_context->rcv_nxt),
2975 le32_to_cpu(nesqp->nesqp_context->snd_nxt),
2976 cm_node->tcp_cntxt.mss, le32_to_cpu(nesqp->nesqp_context->pd_index_wscale),
2977 le32_to_cpu(nesqp->nesqp_context->rcv_wnd),
2978 le32_to_cpu(nesqp->nesqp_context->misc));
3c2d774c
GS		 2979 nes_debug(NES_DBG_CM, " snd_wnd = 0x%08X.\n", le32_to_cpu(nesqp->nesqp_context->snd_wnd));
2980 nes_debug(NES_DBG_CM, " snd_cwnd = 0x%08X.\n", le32_to_cpu(nesqp->nesqp_context->cwnd));
2981 nes_debug(NES_DBG_CM, " max_swnd = 0x%08X.\n", le32_to_cpu(nesqp->nesqp_context->max_snd_wnd));
2982
2983 nes_debug(NES_DBG_CM, "Change cm_node state to TSA\n");
2984 cm_node->state = NES_CM_STATE_TSA;
2985
2986 return ret;
2987}
2988
2989
2990/**
2991 * nes_cm_disconn
2992 */
2993int nes_cm_disconn(struct nes_qp *nesqp)
2994{
873fcdd4 2995 struct disconn_work *work;
3c2d774c 2996
873fcdd4
DW		 2997 work = kzalloc(sizeof *work, GFP_ATOMIC);
2998 if (!work)
615eb715 2999 return -ENOMEM; /* Timer will clean up */
3c2d774c 3000
873fcdd4
DW		 3001 nes_add_ref(&nesqp->ibqp);
3002 work->nesqp = nesqp;
3003 INIT_WORK(&work->work, nes_disconnect_worker);
3004 queue_work(g_cm_core->disconn_wq, &work->work);
3c2d774c
GS		 3005 return 0;
3006}
3007
3008
3009/**
3010 * nes_disconnect_worker
3011 */
1a855fbf 3012static void nes_disconnect_worker(struct work_struct *work)
3c2d774c 3013{
873fcdd4
DW		 3014 struct disconn_work *dwork = container_of(work, struct disconn_work, work);
3015 struct nes_qp *nesqp = dwork->nesqp;
3c2d774c 3016
873fcdd4 3017 kfree(dwork);
3c2d774c 3018 nes_debug(NES_DBG_CM, "processing AEQE id 0x%04X for QP%u.\n",
615eb715 3019 nesqp->last_aeq, nesqp->hwqp.qp_id);
3c2d774c 3020 nes_cm_disconn_true(nesqp);
c4c3f279 3021 nes_rem_ref(&nesqp->ibqp);
3c2d774c
GS		 3022}
3023
3024
3025/**
3026 * nes_cm_disconn_true
3027 */
1a855fbf 3028static int nes_cm_disconn_true(struct nes_qp *nesqp)
3c2d774c
GS		 3029{
3030 unsigned long flags;
3031 int ret = 0;
3032 struct iw_cm_id *cm_id;
3033 struct iw_cm_event cm_event;
3034 struct nes_vnic *nesvnic;
3035 u16 last_ae;
3036 u8 original_hw_tcp_state;
3037 u8 original_ibqp_state;
d0c49bf3 3038 int disconn_status = 0;
b29a4fc4
DW		 3039 int issue_disconn = 0;
3040 int issue_close = 0;
3041 int issue_flush = 0;
3042 u32 flush_q = NES_CQP_FLUSH_RQ;
3043 struct ib_event ibevent;
3c2d774c
GS		 3044
3045 if (!nesqp) {
3046 nes_debug(NES_DBG_CM, "disconnect_worker nesqp is NULL\n");
3047 return -1;
3048 }
3049
3050 spin_lock_irqsave(&nesqp->lock, flags);
3051 cm_id = nesqp->cm_id;
3052 /* make sure we havent already closed this connection */
3053 if (!cm_id) {
3054 nes_debug(NES_DBG_CM, "QP%u disconnect_worker cmid is NULL\n",
615eb715 3055 nesqp->hwqp.qp_id);
3c2d774c 3056 spin_unlock_irqrestore(&nesqp->lock, flags);
3c2d774c
GS		 3057 return -1;
3058 }
3059
3060 nesvnic = to_nesvnic(nesqp->ibqp.device);
3061 nes_debug(NES_DBG_CM, "Disconnecting QP%u\n", nesqp->hwqp.qp_id);
3062
3063 original_hw_tcp_state = nesqp->hw_tcp_state;
615eb715 3064 original_ibqp_state = nesqp->ibqp_state;
3c2d774c
GS		 3065 last_ae = nesqp->last_aeq;
3066
b29a4fc4
DW		 3067 if (nesqp->term_flags) {
3068 issue_disconn = 1;
3069 issue_close = 1;
3070 nesqp->cm_id = NULL;
196f40c8 3071 del_timer(&nesqp->terminate_timer);
b29a4fc4
DW		 3072 if (nesqp->flush_issued == 0) {
3073 nesqp->flush_issued = 1;
3074 issue_flush = 1;
3075 }
3076 } else if ((original_hw_tcp_state == NES_AEQE_TCP_STATE_CLOSE_WAIT) ||
3077 ((original_ibqp_state == IB_QPS_RTS) &&
3078 (last_ae == NES_AEQE_AEID_LLP_CONNECTION_RESET))) {
3079 issue_disconn = 1;
3080 if (last_ae == NES_AEQE_AEID_LLP_CONNECTION_RESET)
d0c49bf3 3081 disconn_status = -ECONNRESET;
b29a4fc4
DW		 3082 }
3083
3084 if (((original_hw_tcp_state == NES_AEQE_TCP_STATE_CLOSED) ||
3085 (original_hw_tcp_state == NES_AEQE_TCP_STATE_TIME_WAIT) ||
3086 (last_ae == NES_AEQE_AEID_RDMAP_ROE_BAD_LLP_CLOSE) ||
3087 (last_ae == NES_AEQE_AEID_LLP_CONNECTION_RESET))) {
3088 issue_close = 1;
3089 nesqp->cm_id = NULL;
3090 if (nesqp->flush_issued == 0) {
3091 nesqp->flush_issued = 1;
3092 issue_flush = 1;
3093 }
3094 }
3c2d774c 3095
b29a4fc4
DW		 3096 spin_unlock_irqrestore(&nesqp->lock, flags);
3097
3098 if ((issue_flush) && (nesqp->destroyed == 0)) {
3099 /* Flush the queue(s) */
3100 if (nesqp->hw_iwarp_state >= NES_AEQE_IWARP_STATE_TERMINATE)
3101 flush_q |= NES_CQP_FLUSH_SQ;
3102 flush_wqes(nesvnic->nesdev, nesqp, flush_q, 1);
3103
3104 if (nesqp->term_flags) {
3105 ibevent.device = nesqp->ibqp.device;
3106 ibevent.event = nesqp->terminate_eventtype;
3107 ibevent.element.qp = &nesqp->ibqp;
784d135f
TN		 3108 if (nesqp->ibqp.event_handler)
3109 nesqp->ibqp.event_handler(&ibevent, nesqp->ibqp.qp_context);
b29a4fc4
DW		 3110 }
3111 }
3c2d774c 3112
b29a4fc4
DW		 3113 if ((cm_id) && (cm_id->event_handler)) {
3114 if (issue_disconn) {
3c2d774c
GS		 3115 atomic_inc(&cm_disconnects);
3116 cm_event.event = IW_CM_EVENT_DISCONNECT;
b29a4fc4 3117 cm_event.status = disconn_status;
3c2d774c
GS		 3118 cm_event.local_addr = cm_id->local_addr;
3119 cm_event.remote_addr = cm_id->remote_addr;
3120 cm_event.private_data = NULL;
3121 cm_event.private_data_len = 0;
3122
6492cdf3 3123 nes_debug(NES_DBG_CM, "Generating a CM Disconnect Event"
615eb715
TN		 3124 " for QP%u, SQ Head = %u, SQ Tail = %u. "
3125 "cm_id = %p, refcount = %u.\n",
3126 nesqp->hwqp.qp_id, nesqp->hwqp.sq_head,
3127 nesqp->hwqp.sq_tail, cm_id,
3128 atomic_read(&nesqp->refcount));
3c2d774c 3129
3c2d774c
GS		 3130 ret = cm_id->event_handler(cm_id, &cm_event);
3131 if (ret)
6492cdf3 3132 nes_debug(NES_DBG_CM, "OFA CM event_handler "
615eb715 3133 "returned, ret=%d\n", ret);
3c2d774c
GS		 3134 }
3135
b29a4fc4 3136 if (issue_close) {
3c2d774c 3137 atomic_inc(&cm_closes);
3c2d774c
GS		 3138 nes_disconnect(nesqp, 1);
3139
3140 cm_id->provider_data = nesqp;
3141 /* Send up the close complete event */
3142 cm_event.event = IW_CM_EVENT_CLOSE;
d0c49bf3 3143 cm_event.status = 0;
3c2d774c
GS		 3144 cm_event.provider_data = cm_id->provider_data;
3145 cm_event.local_addr = cm_id->local_addr;
3146 cm_event.remote_addr = cm_id->remote_addr;
3147 cm_event.private_data = NULL;
3148 cm_event.private_data_len = 0;
3149
3150 ret = cm_id->event_handler(cm_id, &cm_event);
615eb715 3151 if (ret)
3c2d774c 3152 nes_debug(NES_DBG_CM, "OFA CM event_handler returned, ret=%d\n", ret);
3c2d774c
GS		 3153
3154 cm_id->rem_ref(cm_id);
3c2d774c 3155 }
3c2d774c 3156 }
3c2d774c
GS		 3157
3158 return 0;
3159}
3160
3161
3162/**
3163 * nes_disconnect
3164 */
1a855fbf 3165static int nes_disconnect(struct nes_qp *nesqp, int abrupt)
3c2d774c
GS		 3166{
3167 int ret = 0;
3168 struct nes_vnic *nesvnic;
3169 struct nes_device *nesdev;
c12e56ef 3170 struct nes_ib_device *nesibdev;
3c2d774c
GS		 3171
3172 nesvnic = to_nesvnic(nesqp->ibqp.device);
3173 if (!nesvnic)
3174 return -EINVAL;
3175
3176 nesdev = nesvnic->nesdev;
c12e56ef 3177 nesibdev = nesvnic->nesibdev;
3c2d774c
GS		 3178
3179 nes_debug(NES_DBG_CM, "netdev refcnt = %u.\n",
29b4433d 3180 netdev_refcnt_read(nesvnic->netdev));
3c2d774c
GS		 3181
3182 if (nesqp->active_conn) {
3183
3184 /* indicate this connection is NOT active */
3185 nesqp->active_conn = 0;
3186 } else {
3187 /* Need to free the Last Streaming Mode Message */
3188 if (nesqp->ietf_frame) {
c12e56ef
FL		 3189 if (nesqp->lsmm_mr)
3190 nesibdev->ibdev.dereg_mr(nesqp->lsmm_mr);
3c2d774c 3191 pci_free_consistent(nesdev->pcidev,
615eb715
TN		 3192 nesqp->private_data_len + nesqp->ietf_frame_size,
3193 nesqp->ietf_frame, nesqp->ietf_frame_pbase);
3c2d774c
GS		 3194 }
3195 }
3196
3197 /* close the CM node down if it is still active */
3198 if (nesqp->cm_node) {
3199 nes_debug(NES_DBG_CM, "Call close API\n");
3200
3201 g_cm_core->api->close(g_cm_core, nesqp->cm_node);
3c2d774c
GS		 3202 }
3203
3204 return ret;
3205}
3206
3207
3208/**
3209 * nes_accept
3210 */
3211int nes_accept(struct iw_cm_id *cm_id, struct iw_cm_conn_param *conn_param)
3212{
3213 u64 u64temp;
3214 struct ib_qp *ibqp;
3215 struct nes_qp *nesqp;
3216 struct nes_vnic *nesvnic;
3217 struct nes_device *nesdev;
3218 struct nes_cm_node *cm_node;
3219 struct nes_adapter *adapter;
3220 struct ib_qp_attr attr;
3221 struct iw_cm_event cm_event;
3222 struct nes_hw_qp_wqe *wqe;
3223 struct nes_v4_quad nes_quad;
30da7cff 3224 u32 crc_value;
3c2d774c 3225 int ret;
183ecfa3 3226 int passive_state;
c12e56ef
FL		 3227 struct nes_ib_device *nesibdev;
3228 struct ib_mr *ibmr = NULL;
3229 struct ib_phys_buf ibphysbuf;
3230 struct nes_pd *nespd;
7a5efb62 3231 u64 tagged_offset;
615eb715
TN		 3232 u8 mpa_frame_offset = 0;
3233 struct ietf_mpa_v2 *mpa_v2_frame;
3234 u8 start_addr = 0;
3235 u8 *start_ptr = &start_addr;
3236 u8 **start_buff = &start_ptr;
3237 u16 buff_len = 0;
24d44a39
SW		 3238 struct sockaddr_in *laddr = (struct sockaddr_in *)&cm_id->local_addr;
3239 struct sockaddr_in *raddr = (struct sockaddr_in *)&cm_id->remote_addr;
c12e56ef 3240
3c2d774c
GS		 3241 ibqp = nes_get_qp(cm_id->device, conn_param->qpn);
3242 if (!ibqp)
3243 return -EINVAL;
3244
3245 /* get all our handles */
3246 nesqp = to_nesqp(ibqp);
3247 nesvnic = to_nesvnic(nesqp->ibqp.device);
3248 nesdev = nesvnic->nesdev;
3249 adapter = nesdev->nesadapter;
3250
3c2d774c 3251 cm_node = (struct nes_cm_node *)cm_id->provider_data;
6492cdf3
FL		 3252 nes_debug(NES_DBG_CM, "nes_accept: cm_node= %p nesvnic=%p, netdev=%p,"
3253 "%s\n", cm_node, nesvnic, nesvnic->netdev,
3254 nesvnic->netdev->name);
3c2d774c 3255
c5a7d489
FL		 3256 if (NES_CM_STATE_LISTENER_DESTROYED == cm_node->state) {
3257 if (cm_node->loopbackpartner)
3258 rem_ref_cm_node(cm_node->cm_core, cm_node->loopbackpartner);
3259 rem_ref_cm_node(cm_node->cm_core, cm_node);
3260 return -EINVAL;
3261 }
3262
dae58728
FL		 3263 passive_state = atomic_add_return(1, &cm_node->passive_state);
3264 if (passive_state == NES_SEND_RESET_EVENT) {
3265 rem_ref_cm_node(cm_node->cm_core, cm_node);
3266 return -ECONNRESET;
3267 }
3c2d774c
GS		 3268 /* associate the node with the QP */
3269 nesqp->cm_node = (void *)cm_node;
6492cdf3 3270 cm_node->nesqp = nesqp;
3c2d774c 3271
4ac79a70 3272
6492cdf3
FL		 3273 nes_debug(NES_DBG_CM, "QP%u, cm_node=%p, jiffies = %lu listener = %p\n",
3274 nesqp->hwqp.qp_id, cm_node, jiffies, cm_node->listener);
3c2d774c
GS		 3275 atomic_inc(&cm_accepts);
3276
3277 nes_debug(NES_DBG_CM, "netdev refcnt = %u.\n",
29b4433d 3278 netdev_refcnt_read(nesvnic->netdev));
3c2d774c 3279
615eb715 3280 nesqp->ietf_frame_size = sizeof(struct ietf_mpa_v2);
6492cdf3
FL		 3281 /* allocate the ietf frame and space for private data */
3282 nesqp->ietf_frame = pci_alloc_consistent(nesdev->pcidev,
615eb715
TN		 3283 nesqp->ietf_frame_size + conn_param->private_data_len,
3284 &nesqp->ietf_frame_pbase);
3c2d774c 3285
6492cdf3 3286 if (!nesqp->ietf_frame) {
615eb715 3287 nes_debug(NES_DBG_CM, "Unable to allocate memory for private data\n");
6492cdf3
FL		 3288 return -ENOMEM;
3289 }
615eb715 3290 mpa_v2_frame = (struct ietf_mpa_v2 *)nesqp->ietf_frame;
3c2d774c 3291
615eb715
TN		 3292 if (cm_node->mpa_frame_rev == IETF_MPA_V1)
3293 mpa_frame_offset = 4;
3c2d774c 3294
4ac79a70
TN		 3295 if (cm_node->mpa_frame_rev == IETF_MPA_V1 ||
3296 cm_node->mpav2_ird_ord == IETF_NO_IRD_ORD) {
3297 record_ird_ord(cm_node, (u16)conn_param->ird, (u16)conn_param->ord);
3298 }
3299
615eb715
TN		 3300 memcpy(mpa_v2_frame->priv_data, conn_param->private_data,
3301 conn_param->private_data_len);
3c2d774c 3302
615eb715
TN		 3303 cm_build_mpa_frame(cm_node, start_buff, &buff_len, nesqp->ietf_frame, MPA_KEY_REPLY);
3304 nesqp->private_data_len = conn_param->private_data_len;
3c2d774c 3305
6492cdf3
FL		 3306 /* setup our first outgoing iWarp send WQE (the IETF frame response) */
3307 wqe = &nesqp->hwqp.sq_vbase[0];
3308
24d44a39 3309 if (raddr->sin_addr.s_addr != laddr->sin_addr.s_addr) {
6492cdf3 3310 u64temp = (unsigned long)nesqp;
c12e56ef
FL		 3311 nesibdev = nesvnic->nesibdev;
3312 nespd = nesqp->nespd;
615eb715
TN		 3313 ibphysbuf.addr = nesqp->ietf_frame_pbase + mpa_frame_offset;
3314 ibphysbuf.size = buff_len;
3315 tagged_offset = (u64)(unsigned long)*start_buff;
c12e56ef 3316 ibmr = nesibdev->ibdev.reg_phys_mr((struct ib_pd *)nespd,
615eb715
TN		 3317 &ibphysbuf, 1,
3318 IB_ACCESS_LOCAL_WRITE,
3319 &tagged_offset);
c12e56ef
FL		 3320 if (!ibmr) {
3321 nes_debug(NES_DBG_CM, "Unable to register memory region"
615eb715
TN		 3322 "for lSMM for cm_node = %p \n",
3323 cm_node);
9256b251 3324 pci_free_consistent(nesdev->pcidev,
615eb715
TN		 3325 nesqp->private_data_len + nesqp->ietf_frame_size,
3326 nesqp->ietf_frame, nesqp->ietf_frame_pbase);
c12e56ef
FL		 3327 return -ENOMEM;
3328 }
3329
3330 ibmr->pd = &nespd->ibpd;
3331 ibmr->device = nespd->ibpd.device;
3332 nesqp->lsmm_mr = ibmr;
3333
615eb715 3334 u64temp |= NES_SW_CONTEXT_ALIGN >> 1;
6492cdf3 3335 set_wqe_64bit_value(wqe->wqe_words,
615eb715
TN		 3336 NES_IWARP_SQ_WQE_COMP_CTX_LOW_IDX,
3337 u64temp);
6492cdf3
FL		 3338 wqe->wqe_words[NES_IWARP_SQ_WQE_MISC_IDX] =
3339 cpu_to_le32(NES_IWARP_SQ_WQE_STREAMING |
615eb715 3340 NES_IWARP_SQ_WQE_WRPDU);
6492cdf3 3341 wqe->wqe_words[NES_IWARP_SQ_WQE_TOTAL_PAYLOAD_IDX] =
615eb715 3342 cpu_to_le32(buff_len);
c12e56ef 3343 set_wqe_64bit_value(wqe->wqe_words,
615eb715
TN		 3344 NES_IWARP_SQ_WQE_FRAG0_LOW_IDX,
3345 (u64)(unsigned long)(*start_buff));
6492cdf3 3346 wqe->wqe_words[NES_IWARP_SQ_WQE_LENGTH0_IDX] =
615eb715 3347 cpu_to_le32(buff_len);
c12e56ef 3348 wqe->wqe_words[NES_IWARP_SQ_WQE_STAG0_IDX] = ibmr->lkey;
d2fa9b26
FL		 3349 if (nesqp->sq_kmapped) {
3350 nesqp->sq_kmapped = 0;
3351 kunmap(nesqp->page);
3352 }
6492cdf3
FL		 3353
3354 nesqp->nesqp_context->ird_ord_sizes |=
3355 cpu_to_le32(NES_QPCONTEXT_ORDIRD_LSMM_PRESENT |
615eb715 3356 NES_QPCONTEXT_ORDIRD_WRPDU);
6492cdf3
FL		 3357 } else {
3358 nesqp->nesqp_context->ird_ord_sizes |=
9d5ab133 3359 cpu_to_le32(NES_QPCONTEXT_ORDIRD_WRPDU);
6492cdf3
FL		 3360 }
3361 nesqp->skip_lsmm = 1;
3c2d774c 3362
3c2d774c
GS		 3363 /* Cache the cm_id in the qp */
3364 nesqp->cm_id = cm_id;
3365 cm_node->cm_id = cm_id;
3366
3367 /* nesqp->cm_node = (void *)cm_id->provider_data; */
3368 cm_id->provider_data = nesqp;
615eb715 3369 nesqp->active_conn = 0;
3c2d774c 3370
6492cdf3
FL		 3371 if (cm_node->state == NES_CM_STATE_TSA)
3372 nes_debug(NES_DBG_CM, "Already state = TSA for cm_node=%p\n",
615eb715 3373 cm_node);
6492cdf3 3374
3c2d774c
GS		 3375 nes_cm_init_tsa_conn(nesqp, cm_node);
3376
5647263c
TN		 3377 nesqp->nesqp_context->tcpPorts[0] =
3378 cpu_to_le16(cm_node->mapped_loc_port);
3379 nesqp->nesqp_context->tcpPorts[1] =
3380 cpu_to_le16(cm_node->mapped_rem_port);
6492cdf3 3381
5647263c 3382 nesqp->nesqp_context->ip0 = cpu_to_le32(cm_node->mapped_rem_addr);
3c2d774c
GS		 3383
3384 nesqp->nesqp_context->misc2 |= cpu_to_le32(
615eb715
TN		 3385 (u32)PCI_FUNC(nesdev->pcidev->devfn) <<
3386 NES_QPCONTEXT_MISC2_SRC_IP_SHIFT);
3c2d774c 3387
6492cdf3
FL		 3388 nesqp->nesqp_context->arp_index_vlan |=
3389 cpu_to_le32(nes_arp_table(nesdev,
615eb715
TN		 3390 le32_to_cpu(nesqp->nesqp_context->ip0), NULL,
3391 NES_ARP_RESOLVE) << 16);
3c2d774c
GS		 3392
3393 nesqp->nesqp_context->ts_val_delta = cpu_to_le32(
6492cdf3 3394 jiffies - nes_read_indexed(nesdev, NES_IDX_TCP_NOW));
3c2d774c
GS		 3395
3396 nesqp->nesqp_context->ird_index = cpu_to_le32(nesqp->hwqp.qp_id);
3397
3398 nesqp->nesqp_context->ird_ord_sizes |= cpu_to_le32(
6492cdf3
FL		 3399 ((u32)1 << NES_QPCONTEXT_ORDIRD_IWARP_MODE_SHIFT));
3400 nesqp->nesqp_context->ird_ord_sizes |=
4ac79a70 3401 cpu_to_le32((u32)cm_node->ord_size);
3c2d774c
GS		 3402
3403 memset(&nes_quad, 0, sizeof(nes_quad));
6492cdf3
FL		 3404 nes_quad.DstIpAdrIndex =
3405 cpu_to_le32((u32)PCI_FUNC(nesdev->pcidev->devfn) << 24);
5647263c
TN		 3406 nes_quad.SrcIpadr = htonl(cm_node->mapped_rem_addr);
3407 nes_quad.TcpPorts[0] = htons(cm_node->mapped_rem_port);
3408 nes_quad.TcpPorts[1] = htons(cm_node->mapped_loc_port);
3c2d774c
GS		 3409
3410 /* Produce hash key */
30da7cff
FL		 3411 crc_value = get_crc_value(&nes_quad);
3412 nesqp->hte_index = cpu_to_be32(crc_value ^ 0xffffffff);
3c2d774c 3413 nes_debug(NES_DBG_CM, "HTE Index = 0x%08X, CRC = 0x%08X\n",
615eb715 3414 nesqp->hte_index, nesqp->hte_index & adapter->hte_index_mask);
3c2d774c
GS		 3415
3416 nesqp->hte_index &= adapter->hte_index_mask;
3417 nesqp->nesqp_context->hte_index = cpu_to_le32(nesqp->hte_index);
3418
3419 cm_node->cm_core->api->accelerated(cm_node->cm_core, cm_node);
3420
6492cdf3 3421 nes_debug(NES_DBG_CM, "QP%u, Destination IP = 0x%08X:0x%04X, local = "
615eb715
TN		 3422 "0x%08X:0x%04X, rcv_nxt=0x%08X, snd_nxt=0x%08X, mpa + "
3423 "private data length=%u.\n", nesqp->hwqp.qp_id,
24d44a39
SW		 3424 ntohl(raddr->sin_addr.s_addr), ntohs(raddr->sin_port),
3425 ntohl(laddr->sin_addr.s_addr), ntohs(laddr->sin_port),
615eb715
TN		 3426 le32_to_cpu(nesqp->nesqp_context->rcv_nxt),
3427 le32_to_cpu(nesqp->nesqp_context->snd_nxt),
3428 buff_len);
3c2d774c 3429
73ac36ea 3430 /* notify OF layer that accept event was successful */
3c2d774c 3431 cm_id->add_ref(cm_id);
9256b251 3432 nes_add_ref(&nesqp->ibqp);
3c2d774c
GS		 3433
3434 cm_event.event = IW_CM_EVENT_ESTABLISHED;
d0c49bf3 3435 cm_event.status = 0;
3c2d774c
GS		 3436 cm_event.provider_data = (void *)nesqp;
3437 cm_event.local_addr = cm_id->local_addr;
3438 cm_event.remote_addr = cm_id->remote_addr;
3439 cm_event.private_data = NULL;
3440 cm_event.private_data_len = 0;
4ac79a70
TN		 3441 cm_event.ird = cm_node->ird_size;
3442 cm_event.ord = cm_node->ord_size;
3443
3c2d774c 3444 ret = cm_id->event_handler(cm_id, &cm_event);
183ecfa3
FL		 3445 attr.qp_state = IB_QPS_RTS;
3446 nes_modify_qp(&nesqp->ibqp, &attr, IB_QP_STATE, NULL);
3c2d774c 3447 if (cm_node->loopbackpartner) {
6492cdf3
FL		 3448 cm_node->loopbackpartner->mpa_frame_size =
3449 nesqp->private_data_len;
3c2d774c 3450 /* copy entire MPA frame to our cm_node's frame */
6492cdf3 3451 memcpy(cm_node->loopbackpartner->mpa_frame_buf,
615eb715 3452 conn_param->private_data, conn_param->private_data_len);
3c2d774c
GS		 3453 create_event(cm_node->loopbackpartner, NES_CM_EVENT_CONNECTED);
3454 }
3455 if (ret)
6492cdf3 3456 printk(KERN_ERR "%s[%u] OFA CM event_handler returned, "
615eb715 3457 "ret=%d\n", __func__, __LINE__, ret);
3c2d774c
GS		 3458
3459 return 0;
3460}
3461
3462
3463/**
3464 * nes_reject
3465 */
3466int nes_reject(struct iw_cm_id *cm_id, const void *pdata, u8 pdata_len)
3467{
3468 struct nes_cm_node *cm_node;
9d5ab133 3469 struct nes_cm_node *loopback;
3c2d774c 3470 struct nes_cm_core *cm_core;
615eb715 3471 u8 *start_buff;
3c2d774c
GS		 3472
3473 atomic_inc(&cm_rejects);
615eb715 3474 cm_node = (struct nes_cm_node *)cm_id->provider_data;
9d5ab133 3475 loopback = cm_node->loopbackpartner;
3c2d774c 3476 cm_core = cm_node->cm_core;
9d5ab133 3477 cm_node->cm_id = cm_id;
3c2d774c 3478
615eb715 3479 if (pdata_len + sizeof(struct ietf_mpa_v2) > MAX_CM_BUFFER)
9d5ab133
FL		 3480 return -EINVAL;
3481
9d5ab133
FL		 3482 if (loopback) {
3483 memcpy(&loopback->mpa_frame.priv_data, pdata, pdata_len);
3484 loopback->mpa_frame.priv_data_len = pdata_len;
615eb715 3485 loopback->mpa_frame_size = pdata_len;
9d5ab133 3486 } else {
615eb715
TN		 3487 start_buff = &cm_node->mpa_frame_buf[0] + sizeof(struct ietf_mpa_v2);
3488 cm_node->mpa_frame_size = pdata_len;
3489 memcpy(start_buff, pdata, pdata_len);
9d5ab133 3490 }
615eb715 3491 return cm_core->api->reject(cm_core, cm_node);
3c2d774c
GS		 3492}
3493
3494
3495/**
3496 * nes_connect
3497 * setup and launch cm connect node
3498 */
3499int nes_connect(struct iw_cm_id *cm_id, struct iw_cm_conn_param *conn_param)
3500{
3501 struct ib_qp *ibqp;
3502 struct nes_qp *nesqp;
3503 struct nes_vnic *nesvnic;
3504 struct nes_device *nesdev;
3505 struct nes_cm_node *cm_node;
3506 struct nes_cm_info cm_info;
53094c38 3507 int apbvt_set = 0;
24d44a39
SW		 3508 struct sockaddr_in *laddr = (struct sockaddr_in *)&cm_id->local_addr;
3509 struct sockaddr_in *raddr = (struct sockaddr_in *)&cm_id->remote_addr;
5647263c
TN		 3510 struct iwpm_dev_data pm_reg_msg;
3511 struct iwpm_sa_data pm_msg;
3512 int iwpm_err = 0;
3c2d774c 3513
24d44a39
SW		 3514 if (cm_id->remote_addr.ss_family != AF_INET)
3515 return -ENOSYS;
3c2d774c
GS		 3516 ibqp = nes_get_qp(cm_id->device, conn_param->qpn);
3517 if (!ibqp)
3518 return -EINVAL;
3519 nesqp = to_nesqp(ibqp);
3520 if (!nesqp)
3521 return -EINVAL;
3522 nesvnic = to_nesvnic(nesqp->ibqp.device);
3523 if (!nesvnic)
3524 return -EINVAL;
615eb715 3525 nesdev = nesvnic->nesdev;
3c2d774c
GS		 3526 if (!nesdev)
3527 return -EINVAL;
3528
24d44a39 3529 if (!laddr->sin_port || !raddr->sin_port)
c5a7d489
FL		 3530 return -EINVAL;
3531
6492cdf3 3532 nes_debug(NES_DBG_CM, "QP%u, current IP = 0x%08X, Destination IP = "
615eb715 3533 "0x%08X:0x%04X, local = 0x%08X:0x%04X.\n", nesqp->hwqp.qp_id,
24d44a39
SW		 3534 ntohl(nesvnic->local_ipaddr), ntohl(raddr->sin_addr.s_addr),
3535 ntohs(raddr->sin_port), ntohl(laddr->sin_addr.s_addr),
3536 ntohs(laddr->sin_port));
3c2d774c 3537
6492cdf3 3538 atomic_inc(&cm_connects);
3c2d774c
GS		 3539 nesqp->active_conn = 1;
3540
3c2d774c
GS		 3541 /* cache the cm_id in the qp */
3542 nesqp->cm_id = cm_id;
3c2d774c 3543 cm_id->provider_data = nesqp;
3c2d774c 3544 nesqp->private_data_len = conn_param->private_data_len;
d3e51328 3545
3c2d774c 3546 nes_debug(NES_DBG_CM, "requested ord = 0x%08X.\n", (u32)conn_param->ord);
6492cdf3 3547 nes_debug(NES_DBG_CM, "mpa private data len =%u\n",
615eb715 3548 conn_param->private_data_len);
3c2d774c 3549
5647263c
TN		 3550 /* set up the connection params for the node */
3551 cm_info.loc_addr = ntohl(laddr->sin_addr.s_addr);
3552 cm_info.loc_port = ntohs(laddr->sin_port);
3553 cm_info.rem_addr = ntohl(raddr->sin_addr.s_addr);
3554 cm_info.rem_port = ntohs(raddr->sin_port);
3555 cm_info.cm_id = cm_id;
3556 cm_info.conn_type = NES_CM_IWARP_CONN_TYPE;
3557
3558 /* No port mapper available, go with the specified peer information */
3559 cm_info.mapped_loc_addr = cm_info.loc_addr;
3560 cm_info.mapped_loc_port = cm_info.loc_port;
3561 cm_info.mapped_rem_addr = cm_info.rem_addr;
3562 cm_info.mapped_rem_port = cm_info.rem_port;
3563
3564 nes_form_reg_msg(nesvnic, &pm_reg_msg);
3565 iwpm_err = iwpm_register_pid(&pm_reg_msg, RDMA_NL_NES);
3566 if (iwpm_err) {
3567 nes_debug(NES_DBG_NLMSG,
3568 "Port Mapper reg pid fail (err = %d).\n", iwpm_err);
3569 }
3570 if (iwpm_valid_pid() && !iwpm_err) {
3571 nes_form_pm_msg(&cm_info, &pm_msg);
3572 iwpm_err = iwpm_add_and_query_mapping(&pm_msg, RDMA_NL_NES);
3573 if (iwpm_err)
3574 nes_debug(NES_DBG_NLMSG,
3575 "Port Mapper query fail (err = %d).\n", iwpm_err);
3576 else
3577 nes_record_pm_msg(&cm_info, &pm_msg);
3578 }
3579
24d44a39 3580 if (laddr->sin_addr.s_addr != raddr->sin_addr.s_addr) {
5647263c
TN		 3581 nes_manage_apbvt(nesvnic, cm_info.mapped_loc_port,
3582 PCI_FUNC(nesdev->pcidev->devfn), NES_MANAGE_APBVT_ADD);
53094c38
FL		 3583 apbvt_set = 1;
3584 }
3c2d774c 3585
5647263c
TN		 3586 if (nes_create_mapinfo(&cm_info))
3587 return -ENOMEM;
3c2d774c
GS		 3588
3589 cm_id->add_ref(cm_id);
3c2d774c
GS		 3590
3591 /* create a connect CM node connection */
6492cdf3 3592 cm_node = g_cm_core->api->connect(g_cm_core, nesvnic,
615eb715
TN		 3593 conn_param->private_data_len, (void *)conn_param->private_data,
3594 &cm_info);
3c2d774c 3595 if (!cm_node) {
53094c38 3596 if (apbvt_set)
5647263c 3597 nes_manage_apbvt(nesvnic, cm_info.mapped_loc_port,
615eb715
TN		 3598 PCI_FUNC(nesdev->pcidev->devfn),
3599 NES_MANAGE_APBVT_DEL);
6492cdf3 3600
5647263c
TN		 3601 nes_debug(NES_DBG_NLMSG, "Delete mapped_loc_port = %04X\n",
3602 cm_info.mapped_loc_port);
3603 nes_remove_mapinfo(cm_info.loc_addr, cm_info.loc_port,
3604 cm_info.mapped_loc_addr, cm_info.mapped_loc_port);
3c2d774c
GS		 3605 cm_id->rem_ref(cm_id);
3606 return -ENOMEM;
3607 }
3608
4ac79a70
TN		 3609 record_ird_ord(cm_node, (u16)conn_param->ird, (u16)conn_param->ord);
3610 if (cm_node->send_rdma0_op == SEND_RDMA_READ_ZERO &&
3611 cm_node->ord_size == 0)
3612 cm_node->ord_size = 1;
3613
53094c38 3614 cm_node->apbvt_set = apbvt_set;
3c2d774c 3615 nesqp->cm_node = cm_node;
6492cdf3 3616 cm_node->nesqp = nesqp;
d7ffd507 3617 nes_add_ref(&nesqp->ibqp);
3c2d774c
GS		 3618
3619 return 0;
3620}
3621
3622
3623/**
3624 * nes_create_listen
3625 */
3626int nes_create_listen(struct iw_cm_id *cm_id, int backlog)
3627{
3628 struct nes_vnic *nesvnic;
3629 struct nes_cm_listener *cm_node;
3630 struct nes_cm_info cm_info;
3c2d774c 3631 int err;
24d44a39 3632 struct sockaddr_in *laddr = (struct sockaddr_in *)&cm_id->local_addr;
3c2d774c 3633
3c2d774c 3634 nes_debug(NES_DBG_CM, "cm_id = %p, local port = 0x%04X.\n",
24d44a39 3635 cm_id, ntohs(laddr->sin_port));
3c2d774c 3636
24d44a39
SW		 3637 if (cm_id->local_addr.ss_family != AF_INET)
3638 return -ENOSYS;
3c2d774c
GS		 3639 nesvnic = to_nesvnic(cm_id->device);
3640 if (!nesvnic)
3641 return -EINVAL;
69d51023 3642
3c2d774c
GS		 3643 nes_debug(NES_DBG_CM, "nesvnic=%p, netdev=%p, %s\n",
3644 nesvnic, nesvnic->netdev, nesvnic->netdev->name);
3645
3646 nes_debug(NES_DBG_CM, "nesvnic->local_ipaddr=0x%08x, sin_addr.s_addr=0x%08x\n",
24d44a39 3647 nesvnic->local_ipaddr, laddr->sin_addr.s_addr);
3c2d774c
GS		 3648
3649 /* setup listen params in our api call struct */
5647263c
TN		 3650 cm_info.loc_addr = ntohl(nesvnic->local_ipaddr);
3651 cm_info.loc_port = ntohs(laddr->sin_port);
3c2d774c
GS		 3652 cm_info.backlog = backlog;
3653 cm_info.cm_id = cm_id;
3654
3655 cm_info.conn_type = NES_CM_IWARP_CONN_TYPE;
3656
5647263c
TN		 3657 /* No port mapper available, go with the specified info */
3658 cm_info.mapped_loc_addr = cm_info.loc_addr;
3659 cm_info.mapped_loc_port = cm_info.loc_port;
3c2d774c
GS		 3660
3661 cm_node = g_cm_core->api->listen(g_cm_core, nesvnic, &cm_info);
3662 if (!cm_node) {
6492cdf3 3663 printk(KERN_ERR "%s[%u] Error returned from listen API call\n",
615eb715 3664 __func__, __LINE__);
3c2d774c
GS		 3665 return -ENOMEM;
3666 }
3667
3668 cm_id->provider_data = cm_node;
3669
3670 if (!cm_node->reused_node) {
5647263c
TN		 3671 if (nes_create_mapinfo(&cm_info))
3672 return -ENOMEM;
3673
3674 err = nes_manage_apbvt(nesvnic, cm_node->mapped_loc_port,
615eb715
TN		 3675 PCI_FUNC(nesvnic->nesdev->pcidev->devfn),
3676 NES_MANAGE_APBVT_ADD);
3c2d774c 3677 if (err) {
6492cdf3 3678 printk(KERN_ERR "nes_manage_apbvt call returned %d.\n",
615eb715 3679 err);
3c2d774c
GS		 3680 g_cm_core->api->stop_listener(g_cm_core, (void *)cm_node);
3681 return err;
3682 }
6e10d2e4 3683 atomic_inc(&cm_listens_created);
3c2d774c
GS		 3684 }
3685
3686 cm_id->add_ref(cm_id);
3687 cm_id->provider_data = (void *)cm_node;
3688
3689
3690 return 0;
3691}
3692
3693
3694/**
3695 * nes_destroy_listen
3696 */
3697int nes_destroy_listen(struct iw_cm_id *cm_id)
3698{
3699 if (cm_id->provider_data)
3700 g_cm_core->api->stop_listener(g_cm_core, cm_id->provider_data);
3701 else
3702 nes_debug(NES_DBG_CM, "cm_id->provider_data was NULL\n");
3703
3704 cm_id->rem_ref(cm_id);
3705
3706 return 0;
3707}
3708
3709
3710/**
3711 * nes_cm_recv
3712 */
3713int nes_cm_recv(struct sk_buff *skb, struct net_device *netdevice)
3714{
4a14f6a7 3715 int rc = 0;
615eb715 3716
3c2d774c 3717 cm_packets_received++;
615eb715 3718 if ((g_cm_core) && (g_cm_core->api))
4a14f6a7 3719 rc = g_cm_core->api->recv_pkt(g_cm_core, netdev_priv(netdevice), skb);
615eb715 3720 else
3c2d774c 3721 nes_debug(NES_DBG_CM, "Unable to process packet for CM,"
615eb715 3722 " cm is not setup properly.\n");
3c2d774c 3723
4a14f6a7 3724 return rc;
3c2d774c
GS		 3725}
3726
3727
3728/**
3729 * nes_cm_start
3730 * Start and init a cm core module
3731 */
3732int nes_cm_start(void)
3733{
3734 nes_debug(NES_DBG_CM, "\n");
3735 /* create the primary CM core, pass this handle to subsequent core inits */
3736 g_cm_core = nes_cm_alloc_core();
615eb715 3737 if (g_cm_core)
3c2d774c 3738 return 0;
615eb715 3739 else
3c2d774c 3740 return -ENOMEM;
3c2d774c
GS		 3741}
3742
3743
3744/**
3745 * nes_cm_stop
3746 * stop and dealloc all cm core instances
3747 */
3748int nes_cm_stop(void)
3749{
3750 g_cm_core->api->destroy_cm_core(g_cm_core);
3751 return 0;
3752}
3753
3754
3755/**
3756 * cm_event_connected
3757 * handle a connected event, setup QPs and HW
3758 */
1a855fbf 3759static void cm_event_connected(struct nes_cm_event *event)
3c2d774c 3760{
3c2d774c
GS		 3761 struct nes_qp *nesqp;
3762 struct nes_vnic *nesvnic;
3763 struct nes_device *nesdev;
3764 struct nes_cm_node *cm_node;
3765 struct nes_adapter *nesadapter;
3766 struct ib_qp_attr attr;
3767 struct iw_cm_id *cm_id;
3768 struct iw_cm_event cm_event;
3c2d774c 3769 struct nes_v4_quad nes_quad;
30da7cff 3770 u32 crc_value;
3c2d774c 3771 int ret;
24d44a39
SW		 3772 struct sockaddr_in *laddr;
3773 struct sockaddr_in *raddr;
3774 struct sockaddr_in *cm_event_laddr;
3c2d774c
GS		 3775
3776 /* get all our handles */
3777 cm_node = event->cm_node;
3778 cm_id = cm_node->cm_id;
3779 nes_debug(NES_DBG_CM, "cm_event_connected - %p - cm_id = %p\n", cm_node, cm_id);
3780 nesqp = (struct nes_qp *)cm_id->provider_data;
3781 nesvnic = to_nesvnic(nesqp->ibqp.device);
3782 nesdev = nesvnic->nesdev;
3783 nesadapter = nesdev->nesadapter;
24d44a39
SW		 3784 laddr = (struct sockaddr_in *)&cm_id->local_addr;
3785 raddr = (struct sockaddr_in *)&cm_id->remote_addr;
3786 cm_event_laddr = (struct sockaddr_in *)&cm_event.local_addr;
3c2d774c 3787
615eb715 3788 if (nesqp->destroyed)
3c2d774c 3789 return;
3c2d774c
GS		 3790 atomic_inc(&cm_connecteds);
3791 nes_debug(NES_DBG_CM, "QP%u attempting to connect to 0x%08X:0x%04X on"
615eb715 3792 " local port 0x%04X. jiffies = %lu.\n",
24d44a39
SW		 3793 nesqp->hwqp.qp_id, ntohl(raddr->sin_addr.s_addr),
3794 ntohs(raddr->sin_port), ntohs(laddr->sin_port), jiffies);
3c2d774c
GS		 3795
3796 nes_cm_init_tsa_conn(nesqp, cm_node);
3797
3798 /* set the QP tsa context */
5647263c
TN		 3799 nesqp->nesqp_context->tcpPorts[0] =
3800 cpu_to_le16(cm_node->mapped_loc_port);
3801 nesqp->nesqp_context->tcpPorts[1] =
3802 cpu_to_le16(cm_node->mapped_rem_port);
3803 nesqp->nesqp_context->ip0 = cpu_to_le32(cm_node->mapped_rem_addr);
3c2d774c
GS		 3804
3805 nesqp->nesqp_context->misc2 |= cpu_to_le32(
6492cdf3
FL		 3806 (u32)PCI_FUNC(nesdev->pcidev->devfn) <<
3807 NES_QPCONTEXT_MISC2_SRC_IP_SHIFT);
3c2d774c 3808 nesqp->nesqp_context->arp_index_vlan |= cpu_to_le32(
6492cdf3
FL		 3809 nes_arp_table(nesdev,
3810 le32_to_cpu(nesqp->nesqp_context->ip0),
3c2d774c
GS		 3811 NULL, NES_ARP_RESOLVE) << 16);
3812 nesqp->nesqp_context->ts_val_delta = cpu_to_le32(
3813 jiffies - nes_read_indexed(nesdev, NES_IDX_TCP_NOW));
3814 nesqp->nesqp_context->ird_index = cpu_to_le32(nesqp->hwqp.qp_id);
3815 nesqp->nesqp_context->ird_ord_sizes |=
6492cdf3
FL		 3816 cpu_to_le32((u32)1 <<
3817 NES_QPCONTEXT_ORDIRD_IWARP_MODE_SHIFT);
4ac79a70
TN		 3818 nesqp->nesqp_context->ird_ord_sizes |=
3819 cpu_to_le32((u32)cm_node->ord_size);
3c2d774c
GS		 3820
3821 /* Adjust tail for not having a LSMM */
615eb715 3822 /*nesqp->hwqp.sq_tail = 1;*/
3c2d774c 3823
615eb715 3824 build_rdma0_msg(cm_node, &nesqp);
6492cdf3 3825
615eb715
TN		 3826 nes_write32(nesdev->regs + NES_WQE_ALLOC,
3827 (1 << 24) | 0x00800000 | nesqp->hwqp.qp_id);
3c2d774c
GS		 3828
3829 memset(&nes_quad, 0, sizeof(nes_quad));
3830
6492cdf3
FL		 3831 nes_quad.DstIpAdrIndex =
3832 cpu_to_le32((u32)PCI_FUNC(nesdev->pcidev->devfn) << 24);
5647263c
TN		 3833 nes_quad.SrcIpadr = htonl(cm_node->mapped_rem_addr);
3834 nes_quad.TcpPorts[0] = htons(cm_node->mapped_rem_port);
3835 nes_quad.TcpPorts[1] = htons(cm_node->mapped_loc_port);
3c2d774c
GS		 3836
3837 /* Produce hash key */
30da7cff
FL		 3838 crc_value = get_crc_value(&nes_quad);
3839 nesqp->hte_index = cpu_to_be32(crc_value ^ 0xffffffff);
3c2d774c 3840 nes_debug(NES_DBG_CM, "HTE Index = 0x%08X, After CRC = 0x%08X\n",
615eb715 3841 nesqp->hte_index, nesqp->hte_index & nesadapter->hte_index_mask);
3c2d774c
GS		 3842
3843 nesqp->hte_index &= nesadapter->hte_index_mask;
3844 nesqp->nesqp_context->hte_index = cpu_to_le32(nesqp->hte_index);
3845
3846 nesqp->ietf_frame = &cm_node->mpa_frame;
615eb715 3847 nesqp->private_data_len = (u8)cm_node->mpa_frame_size;
3c2d774c
GS		 3848 cm_node->cm_core->api->accelerated(cm_node->cm_core, cm_node);
3849
3c2d774c
GS		 3850 /* notify OF layer we successfully created the requested connection */
3851 cm_event.event = IW_CM_EVENT_CONNECT_REPLY;
d0c49bf3 3852 cm_event.status = 0;
3c2d774c 3853 cm_event.provider_data = cm_id->provider_data;
24d44a39
SW		 3854 cm_event_laddr->sin_family = AF_INET;
3855 cm_event_laddr->sin_port = laddr->sin_port;
3c2d774c
GS		 3856 cm_event.remote_addr = cm_id->remote_addr;
3857
6492cdf3 3858 cm_event.private_data = (void *)event->cm_node->mpa_frame_buf;
615eb715
TN		 3859 cm_event.private_data_len = (u8)event->cm_node->mpa_frame_size;
3860 cm_event.ird = cm_node->ird_size;
3861 cm_event.ord = cm_node->ord_size;
3c2d774c 3862
5647263c 3863 cm_event_laddr->sin_addr.s_addr = htonl(event->cm_info.rem_addr);
3c2d774c
GS		 3864 ret = cm_id->event_handler(cm_id, &cm_event);
3865 nes_debug(NES_DBG_CM, "OFA CM event_handler returned, ret=%d\n", ret);
3866
3867 if (ret)
6492cdf3 3868 printk(KERN_ERR "%s[%u] OFA CM event_handler returned, "
615eb715 3869 "ret=%d\n", __func__, __LINE__, ret);
6492cdf3
FL		 3870 attr.qp_state = IB_QPS_RTS;
3871 nes_modify_qp(&nesqp->ibqp, &attr, IB_QP_STATE, NULL);
3c2d774c 3872
6492cdf3 3873 nes_debug(NES_DBG_CM, "Exiting connect thread for QP%u. jiffies = "
615eb715 3874 "%lu\n", nesqp->hwqp.qp_id, jiffies);
3c2d774c
GS		 3875
3876 return;
3877}
3878
3879
3880/**
3881 * cm_event_connect_error
3882 */
1a855fbf 3883static void cm_event_connect_error(struct nes_cm_event *event)
3c2d774c
GS		 3884{
3885 struct nes_qp *nesqp;
3886 struct iw_cm_id *cm_id;
3887 struct iw_cm_event cm_event;
3888 /* struct nes_cm_info cm_info; */
3889 int ret;
3890
3891 if (!event->cm_node)
3892 return;
3893
3894 cm_id = event->cm_node->cm_id;
615eb715 3895 if (!cm_id)
3c2d774c 3896 return;
3c2d774c
GS		 3897
3898 nes_debug(NES_DBG_CM, "cm_node=%p, cm_id=%p\n", event->cm_node, cm_id);
3899 nesqp = cm_id->provider_data;
3900
615eb715 3901 if (!nesqp)
3c2d774c 3902 return;
3c2d774c
GS		 3903
3904 /* notify OF layer about this connection error event */
3905 /* cm_id->rem_ref(cm_id); */
3906 nesqp->cm_id = NULL;
3907 cm_id->provider_data = NULL;
3908 cm_event.event = IW_CM_EVENT_CONNECT_REPLY;
c5a7d489 3909 cm_event.status = -ECONNRESET;
3c2d774c
GS		 3910 cm_event.provider_data = cm_id->provider_data;
3911 cm_event.local_addr = cm_id->local_addr;
3912 cm_event.remote_addr = cm_id->remote_addr;
3913 cm_event.private_data = NULL;
3914 cm_event.private_data_len = 0;
3915
24d44a39
SW		 3916#ifdef CONFIG_INFINIBAND_NES_DEBUG
3917 {
3918 struct sockaddr_in *cm_event_laddr = (struct sockaddr_in *)
3919 &cm_event.local_addr;
3920 struct sockaddr_in *cm_event_raddr = (struct sockaddr_in *)
3921 &cm_event.remote_addr;
3922 nes_debug(NES_DBG_CM, "call CM_EVENT REJECTED, local_addr=%08x, remote_addr=%08x\n",
3923 cm_event_laddr->sin_addr.s_addr, cm_event_raddr->sin_addr.s_addr);
3924 }
3925#endif
3c2d774c
GS		 3926
3927 ret = cm_id->event_handler(cm_id, &cm_event);
3928 nes_debug(NES_DBG_CM, "OFA CM event_handler returned, ret=%d\n", ret);
3929 if (ret)
6492cdf3 3930 printk(KERN_ERR "%s[%u] OFA CM event_handler returned, "
615eb715 3931 "ret=%d\n", __func__, __LINE__, ret);
6492cdf3 3932 cm_id->rem_ref(cm_id);
3c2d774c 3933
6492cdf3 3934 rem_ref_cm_node(event->cm_node->cm_core, event->cm_node);
3c2d774c
GS		 3935 return;
3936}
3937
3938
3939/**
3940 * cm_event_reset
3941 */
1a855fbf 3942static void cm_event_reset(struct nes_cm_event *event)
3c2d774c
GS		 3943{
3944 struct nes_qp *nesqp;
3945 struct iw_cm_id *cm_id;
3946 struct iw_cm_event cm_event;
3947 /* struct nes_cm_info cm_info; */
3948 int ret;
3949
3950 if (!event->cm_node)
3951 return;
3952
3953 if (!event->cm_node->cm_id)
3954 return;
3955
3956 cm_id = event->cm_node->cm_id;
3957
3958 nes_debug(NES_DBG_CM, "%p - cm_id = %p\n", event->cm_node, cm_id);
3959 nesqp = cm_id->provider_data;
f9f3f1e0
FL		 3960 if (!nesqp)
3961 return;
3c2d774c
GS		 3962
3963 nesqp->cm_id = NULL;
3964 /* cm_id->provider_data = NULL; */
3965 cm_event.event = IW_CM_EVENT_DISCONNECT;
d0c49bf3 3966 cm_event.status = -ECONNRESET;
3c2d774c
GS		 3967 cm_event.provider_data = cm_id->provider_data;
3968 cm_event.local_addr = cm_id->local_addr;
3969 cm_event.remote_addr = cm_id->remote_addr;
3970 cm_event.private_data = NULL;
3971 cm_event.private_data_len = 0;
3972
183ecfa3 3973 cm_id->add_ref(cm_id);
f9f3f1e0 3974 ret = cm_id->event_handler(cm_id, &cm_event);
183ecfa3
FL		 3975 atomic_inc(&cm_closes);
3976 cm_event.event = IW_CM_EVENT_CLOSE;
d0c49bf3 3977 cm_event.status = 0;
183ecfa3
FL		 3978 cm_event.provider_data = cm_id->provider_data;
3979 cm_event.local_addr = cm_id->local_addr;
3980 cm_event.remote_addr = cm_id->remote_addr;
3981 cm_event.private_data = NULL;
3982 cm_event.private_data_len = 0;
3983 nes_debug(NES_DBG_CM, "NODE %p Generating CLOSE\n", event->cm_node);
3984 ret = cm_id->event_handler(cm_id, &cm_event);
3985
3c2d774c
GS		 3986 nes_debug(NES_DBG_CM, "OFA CM event_handler returned, ret=%d\n", ret);
3987
3988
3989 /* notify OF layer about this connection error event */
3990 cm_id->rem_ref(cm_id);
3991
3992 return;
3993}
3994
3995
3996/**
3997 * cm_event_mpa_req
3998 */
1a855fbf 3999static void cm_event_mpa_req(struct nes_cm_event *event)
3c2d774c 4000{
615eb715 4001 struct iw_cm_id *cm_id;
3c2d774c
GS		 4002 struct iw_cm_event cm_event;
4003 int ret;
4004 struct nes_cm_node *cm_node;
24d44a39
SW		 4005 struct sockaddr_in *cm_event_laddr = (struct sockaddr_in *)
4006 &cm_event.local_addr;
4007 struct sockaddr_in *cm_event_raddr = (struct sockaddr_in *)
4008 &cm_event.remote_addr;
3c2d774c
GS		 4009
4010 cm_node = event->cm_node;
4011 if (!cm_node)
4012 return;
4013 cm_id = cm_node->cm_id;
4014
4015 atomic_inc(&cm_connect_reqs);
4016 nes_debug(NES_DBG_CM, "cm_node = %p - cm_id = %p, jiffies = %lu\n",
615eb715 4017 cm_node, cm_id, jiffies);
3c2d774c
GS		 4018
4019 cm_event.event = IW_CM_EVENT_CONNECT_REQUEST;
d0c49bf3 4020 cm_event.status = 0;
3c2d774c
GS		 4021 cm_event.provider_data = (void *)cm_node;
4022
24d44a39
SW		 4023 cm_event_laddr->sin_family = AF_INET;
4024 cm_event_laddr->sin_port = htons(event->cm_info.loc_port);
4025 cm_event_laddr->sin_addr.s_addr = htonl(event->cm_info.loc_addr);
3c2d774c 4026
24d44a39
SW		 4027 cm_event_raddr->sin_family = AF_INET;
4028 cm_event_raddr->sin_port = htons(event->cm_info.rem_port);
4029 cm_event_raddr->sin_addr.s_addr = htonl(event->cm_info.rem_addr);
9d5ab133 4030 cm_event.private_data = cm_node->mpa_frame_buf;
615eb715 4031 cm_event.private_data_len = (u8)cm_node->mpa_frame_size;
4ac79a70
TN		 4032 if (cm_node->mpa_frame_rev == IETF_MPA_V1) {
4033 cm_event.ird = NES_MAX_IRD;
4034 cm_event.ord = NES_MAX_ORD;
4035 } else {
615eb715
TN		 4036 cm_event.ird = cm_node->ird_size;
4037 cm_event.ord = cm_node->ord_size;
4ac79a70 4038 }
9d5ab133
FL		 4039
4040 ret = cm_id->event_handler(cm_id, &cm_event);
4041 if (ret)
4042 printk(KERN_ERR "%s[%u] OFA CM event_handler returned, ret=%d\n",
615eb715 4043 __func__, __LINE__, ret);
9d5ab133
FL		 4044 return;
4045}
4046
4047
4048static void cm_event_mpa_reject(struct nes_cm_event *event)
4049{
615eb715 4050 struct iw_cm_id *cm_id;
9d5ab133
FL		 4051 struct iw_cm_event cm_event;
4052 struct nes_cm_node *cm_node;
4053 int ret;
24d44a39
SW		 4054 struct sockaddr_in *cm_event_laddr = (struct sockaddr_in *)
4055 &cm_event.local_addr;
4056 struct sockaddr_in *cm_event_raddr = (struct sockaddr_in *)
4057 &cm_event.remote_addr;
9d5ab133
FL		 4058
4059 cm_node = event->cm_node;
4060 if (!cm_node)
4061 return;
4062 cm_id = cm_node->cm_id;
4063
4064 atomic_inc(&cm_connect_reqs);
4065 nes_debug(NES_DBG_CM, "cm_node = %p - cm_id = %p, jiffies = %lu\n",
615eb715 4066 cm_node, cm_id, jiffies);
9d5ab133
FL		 4067
4068 cm_event.event = IW_CM_EVENT_CONNECT_REPLY;
4069 cm_event.status = -ECONNREFUSED;
4070 cm_event.provider_data = cm_id->provider_data;
4071
24d44a39
SW		 4072 cm_event_laddr->sin_family = AF_INET;
4073 cm_event_laddr->sin_port = htons(event->cm_info.loc_port);
4074 cm_event_laddr->sin_addr.s_addr = htonl(event->cm_info.loc_addr);
9d5ab133 4075
24d44a39
SW		 4076 cm_event_raddr->sin_family = AF_INET;
4077 cm_event_raddr->sin_port = htons(event->cm_info.rem_port);
4078 cm_event_raddr->sin_addr.s_addr = htonl(event->cm_info.rem_addr);
3c2d774c 4079
9d5ab133 4080 cm_event.private_data = cm_node->mpa_frame_buf;
615eb715 4081 cm_event.private_data_len = (u8)cm_node->mpa_frame_size;
9d5ab133
FL		 4082
4083 nes_debug(NES_DBG_CM, "call CM_EVENT_MPA_REJECTED, local_addr=%08x, "
615eb715 4084 "remove_addr=%08x\n",
24d44a39
SW		 4085 cm_event_laddr->sin_addr.s_addr,
4086 cm_event_raddr->sin_addr.s_addr);
3c2d774c
GS		 4087
4088 ret = cm_id->event_handler(cm_id, &cm_event);
4089 if (ret)
9d5ab133 4090 printk(KERN_ERR "%s[%u] OFA CM event_handler returned, ret=%d\n",
615eb715 4091 __func__, __LINE__, ret);
3c2d774c
GS		 4092
4093 return;
4094}
4095
4096
4097static void nes_cm_event_handler(struct work_struct *);
4098
4099/**
4100 * nes_cm_post_event
4101 * post an event to the cm event handler
4102 */
1a855fbf 4103static int nes_cm_post_event(struct nes_cm_event *event)
3c2d774c
GS		 4104{
4105 atomic_inc(&event->cm_node->cm_core->events_posted);
4106 add_ref_cm_node(event->cm_node);
4107 event->cm_info.cm_id->add_ref(event->cm_info.cm_id);
4108 INIT_WORK(&event->event_work, nes_cm_event_handler);
6492cdf3 4109 nes_debug(NES_DBG_CM, "cm_node=%p queue_work, event=%p\n",
615eb715 4110 event->cm_node, event);
3c2d774c
GS		 4111
4112 queue_work(event->cm_node->cm_core->event_wq, &event->event_work);
4113
4114 nes_debug(NES_DBG_CM, "Exit\n");
4115 return 0;
4116}
4117
4118
4119/**
4120 * nes_cm_event_handler
4121 * worker function to handle cm events
4122 * will free instance of nes_cm_event
4123 */
4124static void nes_cm_event_handler(struct work_struct *work)
4125{
6492cdf3 4126 struct nes_cm_event *event = container_of(work, struct nes_cm_event,
615eb715 4127 event_work);
3c2d774c
GS		 4128 struct nes_cm_core *cm_core;
4129
6492cdf3 4130 if ((!event) || (!event->cm_node) || (!event->cm_node->cm_core))
3c2d774c 4131 return;
6492cdf3 4132
3c2d774c
GS		 4133 cm_core = event->cm_node->cm_core;
4134 nes_debug(NES_DBG_CM, "event=%p, event->type=%u, events posted=%u\n",
615eb715 4135 event, event->type, atomic_read(&cm_core->events_posted));
3c2d774c
GS		 4136
4137 switch (event->type) {
6492cdf3
FL		 4138 case NES_CM_EVENT_MPA_REQ:
4139 cm_event_mpa_req(event);
4140 nes_debug(NES_DBG_CM, "cm_node=%p CM Event: MPA REQUEST\n",
615eb715 4141 event->cm_node);
6492cdf3
FL		 4142 break;
4143 case NES_CM_EVENT_RESET:
4144 nes_debug(NES_DBG_CM, "cm_node = %p CM Event: RESET\n",
615eb715 4145 event->cm_node);
6492cdf3
FL		 4146 cm_event_reset(event);
4147 break;
4148 case NES_CM_EVENT_CONNECTED:
4149 if ((!event->cm_node->cm_id) ||
615eb715 4150 (event->cm_node->state != NES_CM_STATE_TSA))
3c2d774c 4151 break;
6492cdf3
FL		 4152 cm_event_connected(event);
4153 nes_debug(NES_DBG_CM, "CM Event: CONNECTED\n");
4154 break;
9d5ab133
FL		 4155 case NES_CM_EVENT_MPA_REJECT:
4156 if ((!event->cm_node->cm_id) ||
615eb715 4157 (event->cm_node->state == NES_CM_STATE_TSA))
9d5ab133
FL		 4158 break;
4159 cm_event_mpa_reject(event);
4160 nes_debug(NES_DBG_CM, "CM Event: REJECT\n");
4161 break;
4162
6492cdf3
FL		 4163 case NES_CM_EVENT_ABORTED:
4164 if ((!event->cm_node->cm_id) ||
615eb715 4165 (event->cm_node->state == NES_CM_STATE_TSA))
3c2d774c 4166 break;
6492cdf3
FL		 4167 cm_event_connect_error(event);
4168 nes_debug(NES_DBG_CM, "CM Event: ABORTED\n");
4169 break;
4170 case NES_CM_EVENT_DROPPED_PKT:
4171 nes_debug(NES_DBG_CM, "CM Event: DROPPED PKT\n");
4172 break;
4173 default:
4174 nes_debug(NES_DBG_CM, "CM Event: UNKNOWN EVENT TYPE\n");
4175 break;
3c2d774c
GS		 4176 }
4177
4178 atomic_dec(&cm_core->events_posted);
4179 event->cm_info.cm_id->rem_ref(event->cm_info.cm_id);
4180 rem_ref_cm_node(cm_core, event->cm_node);
4181 kfree(event);
4182
4183 return;
4184}
Linux kernel - Deliverables
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