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IB/nes: Suppress gcc 7 fall-through complaints
[mirror_ubuntu-bionic-kernel.git] / drivers / infiniband / hw / nes / nes_cm.c
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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 */
c419874c 137static const struct nes_cm_ops nes_cm_api = {
6554c9f7
KC		 138 .accelerated = mini_cm_accelerated,
139 .listen = mini_cm_listen,
140 .stop_listener = mini_cm_del_listen,
141 .connect = mini_cm_connect,
142 .close = mini_cm_close,
143 .accept = mini_cm_accept,
144 .reject = mini_cm_reject,
145 .recv_pkt = mini_cm_recv_pkt,
146 .destroy_cm_core = mini_cm_dealloc_core,
147 .get = mini_cm_get,
148 .set = mini_cm_set
3c2d774c
GS		 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
6a0dde89
FL		 485 iph->saddr = htonl(cm_node->loc_addr);
486 iph->daddr = htonl(cm_node->rem_addr);
3c2d774c 487
6a0dde89
FL		 488 tcph->source = htons(cm_node->loc_port);
489 tcph->dest = htons(cm_node->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
3c2d774c
GS		 528/**
529 * print_core - dump a cm core
530 */
531static void print_core(struct nes_cm_core *core)
532{
533 nes_debug(NES_DBG_CM, "---------------------------------------------\n");
534 nes_debug(NES_DBG_CM, "CM Core -- (core = %p )\n", core);
535 if (!core)
536 return;
537 nes_debug(NES_DBG_CM, "---------------------------------------------\n");
3c2d774c 538
615eb715 539 nes_debug(NES_DBG_CM, "State : %u \n", core->state);
3c2d774c 540
3c2d774c
GS		 541 nes_debug(NES_DBG_CM, "Listen Nodes : %u \n", atomic_read(&core->listen_node_cnt));
542 nes_debug(NES_DBG_CM, "Active Nodes : %u \n", atomic_read(&core->node_cnt));
543
544 nes_debug(NES_DBG_CM, "core : %p \n", core);
545
546 nes_debug(NES_DBG_CM, "-------------- end core ---------------\n");
547}
548
4ac79a70
TN		 549static void record_ird_ord(struct nes_cm_node *cm_node,
550 u16 conn_ird, u16 conn_ord)
551{
552 if (conn_ird > NES_MAX_IRD)
553 conn_ird = NES_MAX_IRD;
554
555 if (conn_ord > NES_MAX_ORD)
556 conn_ord = NES_MAX_ORD;
557
558 cm_node->ird_size = conn_ird;
559 cm_node->ord_size = conn_ord;
560}
561
615eb715
TN		 562/**
563 * cm_build_mpa_frame - build a MPA V1 frame or MPA V2 frame
564 */
565static int cm_build_mpa_frame(struct nes_cm_node *cm_node, u8 **start_buff,
566 u16 *buff_len, u8 *pci_mem, u8 mpa_key)
567{
568 int ret = 0;
569
570 *start_buff = (pci_mem) ? pci_mem : &cm_node->mpa_frame_buf[0];
571
572 switch (cm_node->mpa_frame_rev) {
573 case IETF_MPA_V1:
574 *start_buff = (u8 *)*start_buff + sizeof(struct ietf_rtr_msg);
575 *buff_len = sizeof(struct ietf_mpa_v1) + cm_node->mpa_frame_size;
576 build_mpa_v1(cm_node, *start_buff, mpa_key);
577 break;
578 case IETF_MPA_V2:
579 *buff_len = sizeof(struct ietf_mpa_v2) + cm_node->mpa_frame_size;
580 build_mpa_v2(cm_node, *start_buff, mpa_key);
581 break;
582 default:
583 ret = -EINVAL;
584 }
585 return ret;
586}
587
588/**
589 * build_mpa_v2 - build a MPA V2 frame
590 */
591static void build_mpa_v2(struct nes_cm_node *cm_node,
592 void *start_addr, u8 mpa_key)
593{
594 struct ietf_mpa_v2 *mpa_frame = (struct ietf_mpa_v2 *)start_addr;
595 struct ietf_rtr_msg *rtr_msg = &mpa_frame->rtr_msg;
8dd87fba
TN		 596 u16 ctrl_ird;
597 u16 ctrl_ord;
615eb715
TN		 598
599 /* initialize the upper 5 bytes of the frame */
600 build_mpa_v1(cm_node, start_addr, mpa_key);
601 mpa_frame->flags |= IETF_MPA_V2_FLAG; /* set a bit to indicate MPA V2 */
602 mpa_frame->priv_data_len += htons(IETF_RTR_MSG_SIZE);
603
604 /* initialize RTR msg */
4ac79a70
TN		 605 if (cm_node->mpav2_ird_ord == IETF_NO_IRD_ORD) {
606 ctrl_ird = IETF_NO_IRD_ORD;
607 ctrl_ord = IETF_NO_IRD_ORD;
608 } else {
609 ctrl_ird = cm_node->ird_size & IETF_NO_IRD_ORD;
610 ctrl_ord = cm_node->ord_size & IETF_NO_IRD_ORD;
611 }
8dd87fba 612 ctrl_ird |= IETF_PEER_TO_PEER;
615eb715
TN		 613
614 switch (mpa_key) {
615 case MPA_KEY_REQUEST:
8dd87fba
TN		 616 ctrl_ord |= IETF_RDMA0_WRITE;
617 ctrl_ord |= IETF_RDMA0_READ;
615eb715
TN		 618 break;
619 case MPA_KEY_REPLY:
620 switch (cm_node->send_rdma0_op) {
621 case SEND_RDMA_WRITE_ZERO:
8dd87fba 622 ctrl_ord |= IETF_RDMA0_WRITE;
615eb715
TN		 623 break;
624 case SEND_RDMA_READ_ZERO:
8dd87fba 625 ctrl_ord |= IETF_RDMA0_READ;
615eb715
TN		 626 break;
627 }
628 }
8dd87fba
TN		 629 rtr_msg->ctrl_ird = htons(ctrl_ird);
630 rtr_msg->ctrl_ord = htons(ctrl_ord);
615eb715
TN		 631}
632
633/**
634 * build_mpa_v1 - build a MPA V1 frame
635 */
636static void build_mpa_v1(struct nes_cm_node *cm_node, void *start_addr, u8 mpa_key)
637{
638 struct ietf_mpa_v1 *mpa_frame = (struct ietf_mpa_v1 *)start_addr;
639
640 switch (mpa_key) {
641 case MPA_KEY_REQUEST:
642 memcpy(mpa_frame->key, IEFT_MPA_KEY_REQ, IETF_MPA_KEY_SIZE);
643 break;
644 case MPA_KEY_REPLY:
645 memcpy(mpa_frame->key, IEFT_MPA_KEY_REP, IETF_MPA_KEY_SIZE);
646 break;
647 }
648 mpa_frame->flags = IETF_MPA_FLAGS_CRC;
649 mpa_frame->rev = cm_node->mpa_frame_rev;
650 mpa_frame->priv_data_len = htons(cm_node->mpa_frame_size);
651}
652
653static void build_rdma0_msg(struct nes_cm_node *cm_node, struct nes_qp **nesqp_addr)
654{
655 u64 u64temp;
656 struct nes_qp *nesqp = *nesqp_addr;
657 struct nes_hw_qp_wqe *wqe = &nesqp->hwqp.sq_vbase[0];
658
43adff39 659 u64temp = (unsigned long)nesqp->nesuqp_addr;
615eb715
TN		 660 u64temp |= NES_SW_CONTEXT_ALIGN >> 1;
661 set_wqe_64bit_value(wqe->wqe_words, NES_IWARP_SQ_WQE_COMP_CTX_LOW_IDX, u64temp);
662
663 wqe->wqe_words[NES_IWARP_SQ_WQE_FRAG0_LOW_IDX] = 0;
664 wqe->wqe_words[NES_IWARP_SQ_WQE_FRAG0_HIGH_IDX] = 0;
665
666 switch (cm_node->send_rdma0_op) {
667 case SEND_RDMA_WRITE_ZERO:
668 nes_debug(NES_DBG_CM, "Sending first write.\n");
669 wqe->wqe_words[NES_IWARP_SQ_WQE_MISC_IDX] =
670 cpu_to_le32(NES_IWARP_SQ_OP_RDMAW);
671 wqe->wqe_words[NES_IWARP_SQ_WQE_TOTAL_PAYLOAD_IDX] = 0;
672 wqe->wqe_words[NES_IWARP_SQ_WQE_LENGTH0_IDX] = 0;
673 wqe->wqe_words[NES_IWARP_SQ_WQE_STAG0_IDX] = 0;
674 break;
675
676 case SEND_RDMA_READ_ZERO:
677 default:
079abea6
JL		 678 if (cm_node->send_rdma0_op != SEND_RDMA_READ_ZERO)
679 WARN(1, "Unsupported RDMA0 len operation=%u\n",
680 cm_node->send_rdma0_op);
615eb715
TN		 681 nes_debug(NES_DBG_CM, "Sending first rdma operation.\n");
682 wqe->wqe_words[NES_IWARP_SQ_WQE_MISC_IDX] =
683 cpu_to_le32(NES_IWARP_SQ_OP_RDMAR);
684 wqe->wqe_words[NES_IWARP_SQ_WQE_RDMA_TO_LOW_IDX] = 1;
685 wqe->wqe_words[NES_IWARP_SQ_WQE_RDMA_TO_HIGH_IDX] = 0;
686 wqe->wqe_words[NES_IWARP_SQ_WQE_RDMA_LENGTH_IDX] = 0;
687 wqe->wqe_words[NES_IWARP_SQ_WQE_RDMA_STAG_IDX] = 1;
688 wqe->wqe_words[NES_IWARP_SQ_WQE_STAG0_IDX] = 1;
689 break;
690 }
691
692 if (nesqp->sq_kmapped) {
693 nesqp->sq_kmapped = 0;
694 kunmap(nesqp->page);
695 }
696
697 /*use the reserved spot on the WQ for the extra first WQE*/
698 nesqp->nesqp_context->ird_ord_sizes &= cpu_to_le32(~(NES_QPCONTEXT_ORDIRD_LSMM_PRESENT |
699 NES_QPCONTEXT_ORDIRD_WRPDU |
700 NES_QPCONTEXT_ORDIRD_ALSMM));
701 nesqp->skip_lsmm = 1;
702 nesqp->hwqp.sq_tail = 0;
703}
3c2d774c
GS		 704
705/**
706 * schedule_nes_timer
707 * note - cm_node needs to be protected before calling this. Encase in:
708 * rem_ref_cm_node(cm_core, cm_node);add_ref_cm_node(cm_node);
709 */
710int schedule_nes_timer(struct nes_cm_node *cm_node, struct sk_buff *skb,
615eb715
TN		 711 enum nes_timer_type type, int send_retrans,
712 int close_when_complete)
3c2d774c 713{
615eb715 714 unsigned long flags;
6492cdf3 715 struct nes_cm_core *cm_core = cm_node->cm_core;
3c2d774c
GS		 716 struct nes_timer_entry *new_send;
717 int ret = 0;
3c2d774c
GS		 718
719 new_send = kzalloc(sizeof(*new_send), GFP_ATOMIC);
720 if (!new_send)
9d5ab133 721 return -ENOMEM;
3c2d774c
GS		 722
723 /* new_send->timetosend = currenttime */
724 new_send->retrycount = NES_DEFAULT_RETRYS;
725 new_send->retranscount = NES_DEFAULT_RETRANS;
726 new_send->skb = skb;
727 new_send->timetosend = jiffies;
728 new_send->type = type;
729 new_send->netdev = cm_node->netdev;
730 new_send->send_retrans = send_retrans;
731 new_send->close_when_complete = close_when_complete;
732
733 if (type == NES_TIMER_TYPE_CLOSE) {
615eb715 734 new_send->timetosend += (HZ / 10);
9d5ab133 735 if (cm_node->recv_entry) {
79fc3d74 736 kfree(new_send);
9d5ab133
FL		 737 WARN_ON(1);
738 return -EINVAL;
739 }
740 cm_node->recv_entry = new_send;
3c2d774c
GS		 741 }
742
743 if (type == NES_TIMER_TYPE_SEND) {
b30db1c1 744 new_send->seq_num = ntohl(tcp_hdr(skb)->seq);
63354797 745 refcount_inc(&new_send->skb->users);
6492cdf3
FL		 746 spin_lock_irqsave(&cm_node->retrans_list_lock, flags);
747 cm_node->send_entry = new_send;
748 add_ref_cm_node(cm_node);
749 spin_unlock_irqrestore(&cm_node->retrans_list_lock, flags);
750 new_send->timetosend = jiffies + NES_RETRY_TIMEOUT;
3c2d774c
GS		 751
752 ret = nes_nic_cm_xmit(new_send->skb, cm_node->netdev);
753 if (ret != NETDEV_TX_OK) {
6492cdf3 754 nes_debug(NES_DBG_CM, "Error sending packet %p "
615eb715 755 "(jiffies = %lu)\n", new_send, jiffies);
3c2d774c 756 new_send->timetosend = jiffies;
5962c2c8 757 ret = NETDEV_TX_OK;
3c2d774c
GS		 758 } else {
759 cm_packets_sent++;
760 if (!send_retrans) {
6492cdf3 761 cleanup_retrans_entry(cm_node);
3c2d774c 762 if (close_when_complete)
6492cdf3 763 rem_ref_cm_node(cm_core, cm_node);
3c2d774c
GS		 764 return ret;
765 }
3c2d774c 766 }
3c2d774c 767 }
3c2d774c 768
00ad255d
TN		 769 if (!timer_pending(&cm_core->tcp_timer))
770 mod_timer(&cm_core->tcp_timer, new_send->timetosend);
3c2d774c
GS		 771
772 return ret;
773}
774
9d5ab133
FL		 775static void nes_retrans_expired(struct nes_cm_node *cm_node)
776{
68237a0f 777 struct iw_cm_id *cm_id = cm_node->cm_id;
dae58728
FL		 778 enum nes_cm_node_state state = cm_node->state;
779 cm_node->state = NES_CM_STATE_CLOSED;
615eb715 780
dae58728 781 switch (state) {
9d5ab133
FL		 782 case NES_CM_STATE_SYN_RCVD:
783 case NES_CM_STATE_CLOSING:
784 rem_ref_cm_node(cm_node->cm_core, cm_node);
785 break;
786 case NES_CM_STATE_LAST_ACK:
787 case NES_CM_STATE_FIN_WAIT1:
68237a0f
FL		 788 if (cm_node->cm_id)
789 cm_id->rem_ref(cm_id);
9d5ab133
FL		 790 send_reset(cm_node, NULL);
791 break;
792 default:
69524e1a
FL		 793 add_ref_cm_node(cm_node);
794 send_reset(cm_node, NULL);
9d5ab133
FL		 795 create_event(cm_node, NES_CM_EVENT_ABORTED);
796 }
797}
798
799static void handle_recv_entry(struct nes_cm_node *cm_node, u32 rem_node)
800{
801 struct nes_timer_entry *recv_entry = cm_node->recv_entry;
802 struct iw_cm_id *cm_id = cm_node->cm_id;
803 struct nes_qp *nesqp;
804 unsigned long qplockflags;
805
806 if (!recv_entry)
807 return;
808 nesqp = (struct nes_qp *)recv_entry->skb;
809 if (nesqp) {
810 spin_lock_irqsave(&nesqp->lock, qplockflags);
811 if (nesqp->cm_id) {
812 nes_debug(NES_DBG_CM, "QP%u: cm_id = %p, "
615eb715
TN		 813 "refcount = %d: HIT A "
814 "NES_TIMER_TYPE_CLOSE with something "
815 "to do!!!\n", nesqp->hwqp.qp_id, cm_id,
816 atomic_read(&nesqp->refcount));
9d5ab133
FL		 817 nesqp->hw_tcp_state = NES_AEQE_TCP_STATE_CLOSED;
818 nesqp->last_aeq = NES_AEQE_AEID_RESET_SENT;
819 nesqp->ibqp_state = IB_QPS_ERR;
820 spin_unlock_irqrestore(&nesqp->lock, qplockflags);
821 nes_cm_disconn(nesqp);
822 } else {
823 spin_unlock_irqrestore(&nesqp->lock, qplockflags);
824 nes_debug(NES_DBG_CM, "QP%u: cm_id = %p, "
615eb715
TN		 825 "refcount = %d: HIT A "
826 "NES_TIMER_TYPE_CLOSE with nothing "
827 "to do!!!\n", nesqp->hwqp.qp_id, cm_id,
828 atomic_read(&nesqp->refcount));
9d5ab133
FL		 829 }
830 } else if (rem_node) {
831 /* TIME_WAIT state */
832 rem_ref_cm_node(cm_node->cm_core, cm_node);
833 }
834 if (cm_node->cm_id)
835 cm_id->rem_ref(cm_id);
836 kfree(recv_entry);
837 cm_node->recv_entry = NULL;
838}
3c2d774c
GS		 839
840/**
841 * nes_cm_timer_tick
842 */
1a855fbf 843static void nes_cm_timer_tick(unsigned long pass)
3c2d774c 844{
9d5ab133 845 unsigned long flags;
3c2d774c 846 unsigned long nexttimeout = jiffies + NES_LONG_TIME;
3c2d774c
GS		 847 struct nes_cm_node *cm_node;
848 struct nes_timer_entry *send_entry, *recv_entry;
9d5ab133
FL		 849 struct list_head *list_core_temp;
850 struct list_head *list_node;
3c2d774c 851 struct nes_cm_core *cm_core = g_cm_core;
3c2d774c 852 u32 settimer = 0;
4e9c3900 853 unsigned long timetosend;
3c2d774c 854 int ret = NETDEV_TX_OK;
3c2d774c 855
879e5bd5 856 struct list_head timer_list;
615eb715 857
879e5bd5 858 INIT_LIST_HEAD(&timer_list);
3c2d774c
GS		 859 spin_lock_irqsave(&cm_core->ht_lock, flags);
860
6492cdf3 861 list_for_each_safe(list_node, list_core_temp,
615eb715 862 &cm_core->connected_nodes) {
3c2d774c 863 cm_node = container_of(list_node, struct nes_cm_node, list);
9d5ab133 864 if ((cm_node->recv_entry) || (cm_node->send_entry)) {
879e5bd5
FL		 865 add_ref_cm_node(cm_node);
866 list_add(&cm_node->timer_entry, &timer_list);
867 }
868 }
869 spin_unlock_irqrestore(&cm_core->ht_lock, flags);
870
871 list_for_each_safe(list_node, list_core_temp, &timer_list) {
872 cm_node = container_of(list_node, struct nes_cm_node,
615eb715 873 timer_entry);
9d5ab133
FL		 874 recv_entry = cm_node->recv_entry;
875
876 if (recv_entry) {
6492cdf3
FL		 877 if (time_after(recv_entry->timetosend, jiffies)) {
878 if (nexttimeout > recv_entry->timetosend ||
615eb715 879 !settimer) {
3c2d774c
GS		 880 nexttimeout = recv_entry->timetosend;
881 settimer = 1;
882 }
615eb715 883 } else {
9d5ab133 884 handle_recv_entry(cm_node, 1);
615eb715 885 }
3c2d774c 886 }
3c2d774c
GS		 887
888 spin_lock_irqsave(&cm_node->retrans_list_lock, flags);
6492cdf3
FL		 889 do {
890 send_entry = cm_node->send_entry;
891 if (!send_entry)
c5d321e5 892 break;
3c2d774c
GS		 893 if (time_after(send_entry->timetosend, jiffies)) {
894 if (cm_node->state != NES_CM_STATE_TSA) {
6492cdf3 895 if ((nexttimeout >
615eb715
TN		 896 send_entry->timetosend) ||
897 !settimer) {
6492cdf3
FL		 898 nexttimeout =
899 send_entry->timetosend;
3c2d774c
GS		 900 settimer = 1;
901 }
3c2d774c 902 } else {
6492cdf3 903 free_retrans_entry(cm_node);
3c2d774c 904 }
9d5ab133 905 break;
3c2d774c 906 }
6492cdf3
FL		 907
908 if ((cm_node->state == NES_CM_STATE_TSA) ||
615eb715 909 (cm_node->state == NES_CM_STATE_CLOSED)) {
6492cdf3 910 free_retrans_entry(cm_node);
c5d321e5 911 break;
3c2d774c
GS		 912 }
913
6492cdf3 914 if (!send_entry->retranscount ||
615eb715 915 !send_entry->retrycount) {
3c2d774c 916 cm_packets_dropped++;
6492cdf3 917 free_retrans_entry(cm_node);
9d5ab133 918
6492cdf3
FL		 919 spin_unlock_irqrestore(
920 &cm_node->retrans_list_lock, flags);
9d5ab133
FL		 921 nes_retrans_expired(cm_node);
922 cm_node->state = NES_CM_STATE_CLOSED;
6492cdf3 923 spin_lock_irqsave(&cm_node->retrans_list_lock,
615eb715 924 flags);
c5d321e5 925 break;
3c2d774c 926 }
63354797 927 refcount_inc(&send_entry->skb->users);
3c2d774c 928 cm_packets_retrans++;
6492cdf3 929 nes_debug(NES_DBG_CM, "Retransmitting send_entry %p "
615eb715
TN		 930 "for node %p, jiffies = %lu, time to send = "
931 "%lu, retranscount = %u, send_entry->seq_num = "
932 "0x%08X, cm_node->tcp_cntxt.rem_ack_num = "
933 "0x%08X\n", send_entry, cm_node, jiffies,
934 send_entry->timetosend,
935 send_entry->retranscount,
936 send_entry->seq_num,
937 cm_node->tcp_cntxt.rem_ack_num);
6492cdf3
FL		 938
939 spin_unlock_irqrestore(&cm_node->retrans_list_lock,
615eb715 940 flags);
3c2d774c 941 ret = nes_nic_cm_xmit(send_entry->skb, cm_node->netdev);
6492cdf3 942 spin_lock_irqsave(&cm_node->retrans_list_lock, flags);
3c2d774c 943 if (ret != NETDEV_TX_OK) {
6492cdf3 944 nes_debug(NES_DBG_CM, "rexmit failed for "
615eb715 945 "node=%p\n", cm_node);
3c2d774c 946 cm_packets_bounced++;
3c2d774c
GS		 947 send_entry->retrycount--;
948 nexttimeout = jiffies + NES_SHORT_TIME;
949 settimer = 1;
c5d321e5 950 break;
3c2d774c
GS		 951 } else {
952 cm_packets_sent++;
953 }
6492cdf3 954 nes_debug(NES_DBG_CM, "Packet Sent: retrans count = "
615eb715
TN		 955 "%u, retry count = %u.\n",
956 send_entry->retranscount,
957 send_entry->retrycount);
3c2d774c
GS		 958 if (send_entry->send_retrans) {
959 send_entry->retranscount--;
4e9c3900 960 timetosend = (NES_RETRY_TIMEOUT <<
615eb715 961 (NES_DEFAULT_RETRANS - send_entry->retranscount));
4e9c3900 962
6492cdf3 963 send_entry->timetosend = jiffies +
615eb715 964 min(timetosend, NES_MAX_TIMEOUT);
6492cdf3 965 if (nexttimeout > send_entry->timetosend ||
615eb715 966 !settimer) {
3c2d774c
GS		 967 nexttimeout = send_entry->timetosend;
968 settimer = 1;
969 }
3c2d774c
GS		 970 } else {
971 int close_when_complete;
6492cdf3
FL		 972 close_when_complete =
973 send_entry->close_when_complete;
974 nes_debug(NES_DBG_CM, "cm_node=%p state=%d\n",
615eb715 975 cm_node, cm_node->state);
6492cdf3
FL		 976 free_retrans_entry(cm_node);
977 if (close_when_complete)
978 rem_ref_cm_node(cm_node->cm_core,
615eb715 979 cm_node);
3c2d774c 980 }
6492cdf3 981 } while (0);
3c2d774c 982
6492cdf3
FL		 983 spin_unlock_irqrestore(&cm_node->retrans_list_lock, flags);
984 rem_ref_cm_node(cm_node->cm_core, cm_node);
3c2d774c 985 }
3c2d774c
GS		 986
987 if (settimer) {
00ad255d
TN		 988 if (!timer_pending(&cm_core->tcp_timer))
989 mod_timer(&cm_core->tcp_timer, nexttimeout);
3c2d774c
GS		 990 }
991}
992
993
994/**
995 * send_syn
996 */
6492cdf3 997static int send_syn(struct nes_cm_node *cm_node, u32 sendack,
615eb715 998 struct sk_buff *skb)
3c2d774c
GS		 999{
1000 int ret;
1001 int flags = SET_SYN;
3c2d774c 1002 char optionsbuffer[sizeof(struct option_mss) +
615eb715
TN		 1003 sizeof(struct option_windowscale) + sizeof(struct option_base) +
1004 TCP_OPTIONS_PADDING];
3c2d774c
GS		 1005
1006 int optionssize = 0;
1007 /* Sending MSS option */
1008 union all_known_options *options;
1009
1010 if (!cm_node)
1011 return -EINVAL;
1012
1013 options = (union all_known_options *)&optionsbuffer[optionssize];
1014 options->as_mss.optionnum = OPTION_NUMBER_MSS;
1015 options->as_mss.length = sizeof(struct option_mss);
1016 options->as_mss.mss = htons(cm_node->tcp_cntxt.mss);
1017 optionssize += sizeof(struct option_mss);
1018
1019 options = (union all_known_options *)&optionsbuffer[optionssize];
1020 options->as_windowscale.optionnum = OPTION_NUMBER_WINDOW_SCALE;
1021 options->as_windowscale.length = sizeof(struct option_windowscale);
1022 options->as_windowscale.shiftcount = cm_node->tcp_cntxt.rcv_wscale;
1023 optionssize += sizeof(struct option_windowscale);
1024
6492cdf3 1025 if (sendack && !(NES_DRV_OPT_SUPRESS_OPTION_BC & nes_drv_opt)) {
3c2d774c
GS		 1026 options = (union all_known_options *)&optionsbuffer[optionssize];
1027 options->as_base.optionnum = OPTION_NUMBER_WRITE0;
1028 options->as_base.length = sizeof(struct option_base);
1029 optionssize += sizeof(struct option_base);
1030 /* we need the size to be a multiple of 4 */
1031 options = (union all_known_options *)&optionsbuffer[optionssize];
1032 options->as_end = 1;
1033 optionssize += 1;
1034 options = (union all_known_options *)&optionsbuffer[optionssize];
1035 options->as_end = 1;
1036 optionssize += 1;
1037 }
1038
1039 options = (union all_known_options *)&optionsbuffer[optionssize];
1040 options->as_end = OPTION_NUMBER_END;
1041 optionssize += 1;
1042
6492cdf3 1043 if (!skb)
e189062a 1044 skb = dev_alloc_skb(MAX_CM_BUFFER);
3c2d774c
GS		 1045 if (!skb) {
1046 nes_debug(NES_DBG_CM, "Failed to get a Free pkt\n");
1047 return -1;
1048 }
1049
1050 if (sendack)
1051 flags |= SET_ACK;
1052
1053 form_cm_frame(skb, cm_node, optionsbuffer, optionssize, NULL, 0, flags);
1054 ret = schedule_nes_timer(cm_node, skb, NES_TIMER_TYPE_SEND, 1, 0);
1055
1056 return ret;
1057}
1058
1059
1060/**
1061 * send_reset
1062 */
6492cdf3 1063static int send_reset(struct nes_cm_node *cm_node, struct sk_buff *skb)
3c2d774c
GS		 1064{
1065 int ret;
3c2d774c
GS		 1066 int flags = SET_RST | SET_ACK;
1067
6492cdf3 1068 if (!skb)
e189062a 1069 skb = dev_alloc_skb(MAX_CM_BUFFER);
3c2d774c
GS		 1070 if (!skb) {
1071 nes_debug(NES_DBG_CM, "Failed to get a Free pkt\n");
9d5ab133 1072 return -ENOMEM;
3c2d774c
GS		 1073 }
1074
3c2d774c
GS		 1075 form_cm_frame(skb, cm_node, NULL, 0, NULL, 0, flags);
1076 ret = schedule_nes_timer(cm_node, skb, NES_TIMER_TYPE_SEND, 0, 1);
1077
1078 return ret;
1079}
1080
1081
1082/**
1083 * send_ack
1084 */
6492cdf3 1085static int send_ack(struct nes_cm_node *cm_node, struct sk_buff *skb)
3c2d774c
GS		 1086{
1087 int ret;
6492cdf3
FL		 1088
1089 if (!skb)
e189062a 1090 skb = dev_alloc_skb(MAX_CM_BUFFER);
3c2d774c
GS		 1091
1092 if (!skb) {
1093 nes_debug(NES_DBG_CM, "Failed to get a Free pkt\n");
1094 return -1;
1095 }
1096
1097 form_cm_frame(skb, cm_node, NULL, 0, NULL, 0, SET_ACK);
1098 ret = schedule_nes_timer(cm_node, skb, NES_TIMER_TYPE_SEND, 0, 0);
1099
1100 return ret;
1101}
1102
1103
1104/**
1105 * send_fin
1106 */
1a855fbf 1107static int send_fin(struct nes_cm_node *cm_node, struct sk_buff *skb)
3c2d774c
GS		 1108{
1109 int ret;
1110
1111 /* if we didn't get a frame get one */
1112 if (!skb)
e189062a 1113 skb = dev_alloc_skb(MAX_CM_BUFFER);
3c2d774c
GS		 1114
1115 if (!skb) {
1116 nes_debug(NES_DBG_CM, "Failed to get a Free pkt\n");
1117 return -1;
1118 }
1119
1120 form_cm_frame(skb, cm_node, NULL, 0, NULL, 0, SET_ACK | SET_FIN);
1121 ret = schedule_nes_timer(cm_node, skb, NES_TIMER_TYPE_SEND, 1, 0);
1122
1123 return ret;
1124}
1125
1126
3c2d774c
GS		 1127/**
1128 * find_node - find a cm node that matches the reference cm node
1129 */
1130static struct nes_cm_node *find_node(struct nes_cm_core *cm_core,
615eb715 1131 u16 rem_port, nes_addr_t rem_addr, u16 loc_port, nes_addr_t loc_addr)
3c2d774c
GS		 1132{
1133 unsigned long flags;
3c2d774c
GS		 1134 struct list_head *hte;
1135 struct nes_cm_node *cm_node;
1136
3c2d774c
GS		 1137 /* get a handle on the hte */
1138 hte = &cm_core->connected_nodes;
1139
3c2d774c
GS		 1140 /* walk list and find cm_node associated with this session ID */
1141 spin_lock_irqsave(&cm_core->ht_lock, flags);
4e96a774 1142 list_for_each_entry(cm_node, hte, list) {
3c2d774c
GS		 1143 /* compare quad, return node handle if a match */
1144 nes_debug(NES_DBG_CM, "finding node %x:%x =? %x:%x ^ %x:%x =? %x:%x\n",
615eb715
TN		 1145 cm_node->loc_addr, cm_node->loc_port,
1146 loc_addr, loc_port,
1147 cm_node->rem_addr, cm_node->rem_port,
1148 rem_addr, rem_port);
6a0dde89
FL		 1149 if ((cm_node->loc_addr == loc_addr) &&
1150 (cm_node->loc_port == loc_port) &&
1151 (cm_node->rem_addr == rem_addr) &&
1152 (cm_node->rem_port == rem_port)) {
3c2d774c
GS		 1153 add_ref_cm_node(cm_node);
1154 spin_unlock_irqrestore(&cm_core->ht_lock, flags);
1155 return cm_node;
1156 }
1157 }
1158 spin_unlock_irqrestore(&cm_core->ht_lock, flags);
1159
1160 /* no owner node */
1161 return NULL;
1162}
1163
1164
1165/**
1166 * find_listener - find a cm node listening on this addr-port pair
1167 */
1168static struct nes_cm_listener *find_listener(struct nes_cm_core *cm_core,
6a0dde89
FL		 1169 nes_addr_t dst_addr, u16 dst_port,
1170 enum nes_cm_listener_state listener_state)
3c2d774c
GS		 1171{
1172 unsigned long flags;
3c2d774c 1173 struct nes_cm_listener *listen_node;
5647263c
TN		 1174 nes_addr_t listen_addr;
1175 u16 listen_port;
3c2d774c
GS		 1176
1177 /* walk list and find cm_node associated with this session ID */
1178 spin_lock_irqsave(&cm_core->listen_list_lock, flags);
4e96a774 1179 list_for_each_entry(listen_node, &cm_core->listen_list.list, list) {
6a0dde89
FL		 1180 listen_addr = listen_node->loc_addr;
1181 listen_port = listen_node->loc_port;
1182
3c2d774c 1183 /* compare node pair, return node handle if a match */
5647263c
TN		 1184 if (((listen_addr == dst_addr) ||
1185 listen_addr == 0x00000000) &&
1186 (listen_port == dst_port) &&
615eb715 1187 (listener_state & listen_node->listener_state)) {
3c2d774c
GS		 1188 atomic_inc(&listen_node->ref_count);
1189 spin_unlock_irqrestore(&cm_core->listen_list_lock, flags);
1190 return listen_node;
1191 }
1192 }
1193 spin_unlock_irqrestore(&cm_core->listen_list_lock, flags);
1194
3c2d774c
GS		 1195 /* no listener */
1196 return NULL;
1197}
1198
3c2d774c
GS		 1199/**
1200 * add_hte_node - add a cm node to the hash table
1201 */
1202static int add_hte_node(struct nes_cm_core *cm_core, struct nes_cm_node *cm_node)
1203{
1204 unsigned long flags;
3c2d774c
GS		 1205 struct list_head *hte;
1206
1207 if (!cm_node || !cm_core)
1208 return -EINVAL;
1209
6492cdf3 1210 nes_debug(NES_DBG_CM, "Adding Node %p to Active Connection HT\n",
615eb715 1211 cm_node);
3c2d774c 1212
3c2d774c
GS		 1213 spin_lock_irqsave(&cm_core->ht_lock, flags);
1214
1215 /* get a handle on the hash table element (list head for this slot) */
1216 hte = &cm_core->connected_nodes;
1217 list_add_tail(&cm_node->list, hte);
1218 atomic_inc(&cm_core->ht_node_cnt);
1219
1220 spin_unlock_irqrestore(&cm_core->ht_lock, flags);
1221
1222 return 0;
1223}
1224
1225
1226/**
1227 * mini_cm_dec_refcnt_listen
1228 */
1229static int mini_cm_dec_refcnt_listen(struct nes_cm_core *cm_core,
615eb715 1230 struct nes_cm_listener *listener, int free_hanging_nodes)
3c2d774c 1231{
9d5ab133
FL		 1232 int ret = -EINVAL;
1233 int err = 0;
3c2d774c 1234 unsigned long flags;
6492cdf3
FL		 1235 struct list_head *list_pos = NULL;
1236 struct list_head *list_temp = NULL;
1237 struct nes_cm_node *cm_node = NULL;
879e5bd5 1238 struct list_head reset_list;
6492cdf3
FL		 1239
1240 nes_debug(NES_DBG_CM, "attempting listener= %p free_nodes= %d, "
615eb715
TN		 1241 "refcnt=%d\n", listener, free_hanging_nodes,
1242 atomic_read(&listener->ref_count));
6492cdf3 1243 /* free non-accelerated child nodes for this listener */
879e5bd5 1244 INIT_LIST_HEAD(&reset_list);
6492cdf3
FL		 1245 if (free_hanging_nodes) {
1246 spin_lock_irqsave(&cm_core->ht_lock, flags);
1247 list_for_each_safe(list_pos, list_temp,
879e5bd5 1248 &g_cm_core->connected_nodes) {
6492cdf3 1249 cm_node = container_of(list_pos, struct nes_cm_node,
615eb715 1250 list);
6492cdf3 1251 if ((cm_node->listener == listener) &&
879e5bd5
FL		 1252 (!cm_node->accelerated)) {
1253 add_ref_cm_node(cm_node);
1254 list_add(&cm_node->reset_entry, &reset_list);
6492cdf3
FL		 1255 }
1256 }
1257 spin_unlock_irqrestore(&cm_core->ht_lock, flags);
1258 }
879e5bd5
FL		 1259
1260 list_for_each_safe(list_pos, list_temp, &reset_list) {
1261 cm_node = container_of(list_pos, struct nes_cm_node,
615eb715 1262 reset_entry);
9d5ab133
FL		 1263 {
1264 struct nes_cm_node *loopback = cm_node->loopbackpartner;
c5a7d489 1265 enum nes_cm_node_state old_state;
9d5ab133
FL		 1266 if (NES_CM_STATE_FIN_WAIT1 <= cm_node->state) {
1267 rem_ref_cm_node(cm_node->cm_core, cm_node);
1268 } else {
1269 if (!loopback) {
1270 cleanup_retrans_entry(cm_node);
1271 err = send_reset(cm_node, NULL);
1272 if (err) {
1273 cm_node->state =
615eb715 1274 NES_CM_STATE_CLOSED;
9d5ab133
FL		 1275 WARN_ON(1);
1276 } else {
c5a7d489
FL		 1277 old_state = cm_node->state;
1278 cm_node->state = NES_CM_STATE_LISTENER_DESTROYED;
1279 if (old_state != NES_CM_STATE_MPAREQ_RCVD)
1280 rem_ref_cm_node(
1281 cm_node->cm_core,
1282 cm_node);
9d5ab133
FL		 1283 }
1284 } else {
1285 struct nes_cm_event event;
1286
1287 event.cm_node = loopback;
1288 event.cm_info.rem_addr =
1289 loopback->rem_addr;
1290 event.cm_info.loc_addr =
1291 loopback->loc_addr;
1292 event.cm_info.rem_port =
1293 loopback->rem_port;
1294 event.cm_info.loc_port =
1295 loopback->loc_port;
1296 event.cm_info.cm_id = loopback->cm_id;
43093b94
FL		 1297 add_ref_cm_node(loopback);
1298 loopback->state = NES_CM_STATE_CLOSED;
9d5ab133 1299 cm_event_connect_error(&event);
c5a7d489 1300 cm_node->state = NES_CM_STATE_LISTENER_DESTROYED;
9d5ab133 1301
9d5ab133
FL		 1302 rem_ref_cm_node(cm_node->cm_core,
1303 cm_node);
1304
1305 }
1306 }
1307 }
879e5bd5
FL		 1308 }
1309
3c2d774c
GS		 1310 spin_lock_irqsave(&cm_core->listen_list_lock, flags);
1311 if (!atomic_dec_return(&listener->ref_count)) {
1312 list_del(&listener->list);
1313
1314 /* decrement our listen node count */
1315 atomic_dec(&cm_core->listen_node_cnt);
1316
1317 spin_unlock_irqrestore(&cm_core->listen_list_lock, flags);
1318
5647263c
TN		 1319 if (listener->nesvnic) {
1320 nes_manage_apbvt(listener->nesvnic,
6a0dde89 1321 listener->loc_port,
5647263c
TN		 1322 PCI_FUNC(listener->nesvnic->nesdev->pcidev->devfn),
1323 NES_MANAGE_APBVT_DEL);
1324
5647263c 1325 nes_debug(NES_DBG_NLMSG,
6a0dde89
FL		 1326 "Delete APBVT loc_port = %04X\n",
1327 listener->loc_port);
5647263c 1328 }
3c2d774c
GS		 1329
1330 nes_debug(NES_DBG_CM, "destroying listener (%p)\n", listener);
1331
1332 kfree(listener);
a2e9c384 1333 listener = NULL;
3c2d774c 1334 ret = 0;
6e10d2e4 1335 atomic_inc(&cm_listens_destroyed);
3c2d774c
GS		 1336 } else {
1337 spin_unlock_irqrestore(&cm_core->listen_list_lock, flags);
1338 }
1339 if (listener) {
1340 if (atomic_read(&listener->pend_accepts_cnt) > 0)
1341 nes_debug(NES_DBG_CM, "destroying listener (%p)"
615eb715
TN		 1342 " with non-zero pending accepts=%u\n",
1343 listener, atomic_read(&listener->pend_accepts_cnt));
3c2d774c
GS		 1344 }
1345
1346 return ret;
1347}
1348
1349
1350/**
1351 * mini_cm_del_listen
1352 */
1353static int mini_cm_del_listen(struct nes_cm_core *cm_core,
615eb715 1354 struct nes_cm_listener *listener)
3c2d774c
GS		 1355{
1356 listener->listener_state = NES_CM_LISTENER_PASSIVE_STATE;
1357 listener->cm_id = NULL; /* going to be destroyed pretty soon */
1358 return mini_cm_dec_refcnt_listen(cm_core, listener, 1);
1359}
1360
1361
1362/**
1363 * mini_cm_accelerated
1364 */
1365static inline int mini_cm_accelerated(struct nes_cm_core *cm_core,
615eb715 1366 struct nes_cm_node *cm_node)
3c2d774c 1367{
3c2d774c
GS		 1368 cm_node->accelerated = 1;
1369
1370 if (cm_node->accept_pend) {
1371 BUG_ON(!cm_node->listener);
1372 atomic_dec(&cm_node->listener->pend_accepts_cnt);
9d5ab133 1373 cm_node->accept_pend = 0;
3c2d774c
GS		 1374 BUG_ON(atomic_read(&cm_node->listener->pend_accepts_cnt) < 0);
1375 }
1376
00ad255d
TN		 1377 if (!timer_pending(&cm_core->tcp_timer))
1378 mod_timer(&cm_core->tcp_timer, (jiffies + NES_SHORT_TIME));
3c2d774c
GS		 1379
1380 return 0;
1381}
1382
1383
1384/**
7191a0a1 1385 * nes_addr_resolve_neigh
3c2d774c 1386 */
7a576dfd 1387static int nes_addr_resolve_neigh(struct nes_vnic *nesvnic, u32 dst_ip, int arpindex)
3c2d774c
GS		 1388{
1389 struct rtable *rt;
7191a0a1 1390 struct neighbour *neigh;
7a576dfd 1391 int rc = arpindex;
2a4c97ea 1392 struct net_device *netdev;
7a576dfd 1393 struct nes_adapter *nesadapter = nesvnic->nesdev->nesadapter;
165d6822 1394 __be32 dst_ipaddr = htonl(dst_ip);
3c2d774c 1395
165d6822 1396 rt = ip_route_output(&init_net, dst_ipaddr, nesvnic->local_ipaddr, 0, 0);
b23dd4fe 1397 if (IS_ERR(rt)) {
9d5ab133 1398 printk(KERN_ERR "%s: ip_route_output_key failed for 0x%08X\n",
615eb715 1399 __func__, dst_ip);
7191a0a1 1400 return rc;
3c2d774c
GS		 1401 }
1402
cf55bb24 1403 if (netif_is_bond_slave(nesvnic->netdev))
7f6e7101 1404 netdev = netdev_master_upper_dev_get(nesvnic->netdev);
2a4c97ea
MS		 1405 else
1406 netdev = nesvnic->netdev;
1407
165d6822 1408 neigh = dst_neigh_lookup(&rt->dst, &dst_ipaddr);
e55684fa 1409
40e2bb58 1410 rcu_read_lock();
7191a0a1
BS		 1411 if (neigh) {
1412 if (neigh->nud_state & NUD_VALID) {
1413 nes_debug(NES_DBG_CM, "Neighbor MAC address for 0x%08X"
e174961c
JB		 1414 " is %pM, Gateway is 0x%08X \n", dst_ip,
1415 neigh->ha, ntohl(rt->rt_gateway));
7a576dfd
FL		 1416
1417 if (arpindex >= 0) {
79adc532 1418 if (ether_addr_equal(nesadapter->arp_table[arpindex].mac_addr, neigh->ha)) {
7a576dfd 1419 /* Mac address same as in nes_arp_table */
e55684fa 1420 goto out;
7a576dfd
FL		 1421 }
1422
1423 nes_manage_arp_cache(nesvnic->netdev,
615eb715
TN		 1424 nesadapter->arp_table[arpindex].mac_addr,
1425 dst_ip, NES_ARP_DELETE);
7a576dfd
FL		 1426 }
1427
7191a0a1
BS		 1428 nes_manage_arp_cache(nesvnic->netdev, neigh->ha,
1429 dst_ip, NES_ARP_ADD);
1430 rc = nes_arp_table(nesvnic->nesdev, dst_ip, NULL,
1431 NES_ARP_RESOLVE);
40e2bb58
DM		 1432 } else {
1433 neigh_event_send(neigh, NULL);
7191a0a1 1434 }
580da35a 1435 }
e55684fa 1436out:
40e2bb58 1437 rcu_read_unlock();
e55684fa
DM		 1438
1439 if (neigh)
1440 neigh_release(neigh);
1441
3c2d774c 1442 ip_rt_put(rt);
7191a0a1 1443 return rc;
3c2d774c
GS		 1444}
1445
3c2d774c
GS		 1446/**
1447 * make_cm_node - create a new instance of a cm node
1448 */
1449static struct nes_cm_node *make_cm_node(struct nes_cm_core *cm_core,
615eb715
TN		 1450 struct nes_vnic *nesvnic, struct nes_cm_info *cm_info,
1451 struct nes_cm_listener *listener)
3c2d774c
GS		 1452{
1453 struct nes_cm_node *cm_node;
1454 struct timespec ts;
7a576dfd 1455 int oldarpindex = 0;
3c2d774c
GS		 1456 int arpindex = 0;
1457 struct nes_device *nesdev;
1458 struct nes_adapter *nesadapter;
1459
1460 /* create an hte and cm_node for this instance */
1461 cm_node = kzalloc(sizeof(*cm_node), GFP_ATOMIC);
1462 if (!cm_node)
1463 return NULL;
1464
1465 /* set our node specific transport info */
230da36a
TN		 1466 if (listener) {
1467 cm_node->loc_addr = listener->loc_addr;
1468 cm_node->loc_port = listener->loc_port;
1469 } else {
1470 cm_node->loc_addr = cm_info->loc_addr;
1471 cm_node->loc_port = cm_info->loc_port;
1472 }
3c2d774c 1473 cm_node->rem_addr = cm_info->rem_addr;
3c2d774c 1474 cm_node->rem_port = cm_info->rem_port;
615eb715
TN		 1475
1476 cm_node->mpa_frame_rev = mpa_version;
1477 cm_node->send_rdma0_op = SEND_RDMA_READ_ZERO;
4ac79a70
TN		 1478 cm_node->mpav2_ird_ord = 0;
1479 cm_node->ird_size = 0;
1480 cm_node->ord_size = 0;
615eb715 1481
63779436
HH		 1482 nes_debug(NES_DBG_CM, "Make node addresses : loc = %pI4:%x, rem = %pI4:%x\n",
1483 &cm_node->loc_addr, cm_node->loc_port,
1484 &cm_node->rem_addr, cm_node->rem_port);
3c2d774c 1485 cm_node->listener = listener;
854ace98
FL		 1486 if (listener)
1487 cm_node->tos = listener->tos;
3c2d774c
GS		 1488 cm_node->netdev = nesvnic->netdev;
1489 cm_node->cm_id = cm_info->cm_id;
1490 memcpy(cm_node->loc_mac, nesvnic->netdev->dev_addr, ETH_ALEN);
1491
6492cdf3 1492 nes_debug(NES_DBG_CM, "listener=%p, cm_id=%p\n", cm_node->listener,
615eb715 1493 cm_node->cm_id);
3c2d774c 1494
3c2d774c 1495 spin_lock_init(&cm_node->retrans_list_lock);
3c2d774c
GS		 1496
1497 cm_node->loopbackpartner = NULL;
1498 atomic_set(&cm_node->ref_count, 1);
1499 /* associate our parent CM core */
1500 cm_node->cm_core = cm_core;
1501 cm_node->tcp_cntxt.loc_id = NES_CM_DEF_LOCAL_ID;
1502 cm_node->tcp_cntxt.rcv_wscale = NES_CM_DEFAULT_RCV_WND_SCALE;
1503 cm_node->tcp_cntxt.rcv_wnd = NES_CM_DEFAULT_RCV_WND_SCALED >>
615eb715 1504 NES_CM_DEFAULT_RCV_WND_SCALE;
3c2d774c
GS		 1505 ts = current_kernel_time();
1506 cm_node->tcp_cntxt.loc_seq_num = htonl(ts.tv_nsec);
1507 cm_node->tcp_cntxt.mss = nesvnic->max_frame_size - sizeof(struct iphdr) -
615eb715 1508 sizeof(struct tcphdr) - ETH_HLEN - VLAN_HLEN;
3c2d774c
GS		 1509 cm_node->tcp_cntxt.rcv_nxt = 0;
1510 /* get a unique session ID , add thread_id to an upcounter to handle race */
1511 atomic_inc(&cm_core->node_cnt);
3c2d774c
GS		 1512 cm_node->conn_type = cm_info->conn_type;
1513 cm_node->apbvt_set = 0;
1514 cm_node->accept_pend = 0;
1515
1516 cm_node->nesvnic = nesvnic;
1517 /* get some device handles, for arp lookup */
1518 nesdev = nesvnic->nesdev;
1519 nesadapter = nesdev->nesadapter;
1520
1521 cm_node->loopbackpartner = NULL;
7a576dfd 1522
3c2d774c 1523 /* get the mac addr for the remote node */
6a0dde89
FL		 1524 oldarpindex = nes_arp_table(nesdev, cm_node->rem_addr,
1525 NULL, NES_ARP_RESOLVE);
1526 arpindex = nes_addr_resolve_neigh(nesvnic, cm_node->rem_addr,
1527 oldarpindex);
3c2d774c 1528 if (arpindex < 0) {
7a576dfd
FL		 1529 kfree(cm_node);
1530 return NULL;
3c2d774c
GS		 1531 }
1532
1533 /* copy the mac addr to node context */
1534 memcpy(cm_node->rem_mac, nesadapter->arp_table[arpindex].mac_addr, ETH_ALEN);
e174961c
JB		 1535 nes_debug(NES_DBG_CM, "Remote mac addr from arp table: %pM\n",
1536 cm_node->rem_mac);
3c2d774c
GS		 1537
1538 add_hte_node(cm_core, cm_node);
1539 atomic_inc(&cm_nodes_created);
1540
1541 return cm_node;
1542}
1543
1544
1545/**
1546 * add_ref_cm_node - destroy an instance of a cm node
1547 */
1548static int add_ref_cm_node(struct nes_cm_node *cm_node)
1549{
1550 atomic_inc(&cm_node->ref_count);
1551 return 0;
1552}
1553
1554
1555/**
1556 * rem_ref_cm_node - destroy an instance of a cm node
1557 */
1558static int rem_ref_cm_node(struct nes_cm_core *cm_core,
615eb715 1559 struct nes_cm_node *cm_node)
3c2d774c 1560{
9d5ab133 1561 unsigned long flags;
3c2d774c
GS		 1562 struct nes_qp *nesqp;
1563
1564 if (!cm_node)
1565 return -EINVAL;
1566
1567 spin_lock_irqsave(&cm_node->cm_core->ht_lock, flags);
1568 if (atomic_dec_return(&cm_node->ref_count)) {
1569 spin_unlock_irqrestore(&cm_node->cm_core->ht_lock, flags);
1570 return 0;
1571 }
1572 list_del(&cm_node->list);
1573 atomic_dec(&cm_core->ht_node_cnt);
1574 spin_unlock_irqrestore(&cm_node->cm_core->ht_lock, flags);
1575
1576 /* if the node is destroyed before connection was accelerated */
1577 if (!cm_node->accelerated && cm_node->accept_pend) {
1578 BUG_ON(!cm_node->listener);
1579 atomic_dec(&cm_node->listener->pend_accepts_cnt);
1580 BUG_ON(atomic_read(&cm_node->listener->pend_accepts_cnt) < 0);
1581 }
9d5ab133
FL		 1582 WARN_ON(cm_node->send_entry);
1583 if (cm_node->recv_entry)
1584 handle_recv_entry(cm_node, 0);
3c2d774c
GS		 1585 if (cm_node->listener) {
1586 mini_cm_dec_refcnt_listen(cm_core, cm_node->listener, 0);
1587 } else {
1588 if (cm_node->apbvt_set && cm_node->nesvnic) {
6a0dde89 1589 nes_manage_apbvt(cm_node->nesvnic, cm_node->loc_port,
5647263c 1590 PCI_FUNC(cm_node->nesvnic->nesdev->pcidev->devfn),
615eb715 1591 NES_MANAGE_APBVT_DEL);
3c2d774c 1592 }
6a0dde89
FL		 1593 nes_debug(NES_DBG_NLMSG, "Delete APBVT loc_port = %04X\n",
1594 cm_node->loc_port);
3c2d774c
GS		 1595 }
1596
3c2d774c
GS		 1597 atomic_dec(&cm_core->node_cnt);
1598 atomic_inc(&cm_nodes_destroyed);
6492cdf3
FL		 1599 nesqp = cm_node->nesqp;
1600 if (nesqp) {
1601 nesqp->cm_node = NULL;
1602 nes_rem_ref(&nesqp->ibqp);
1603 cm_node->nesqp = NULL;
1604 }
3c2d774c 1605
6492cdf3 1606 kfree(cm_node);
3c2d774c
GS		 1607 return 0;
1608}
1609
3c2d774c
GS		 1610/**
1611 * process_options
1612 */
6492cdf3 1613static int process_options(struct nes_cm_node *cm_node, u8 *optionsloc,
615eb715 1614 u32 optionsize, u32 syn_packet)
3c2d774c
GS		 1615{
1616 u32 tmp;
1617 u32 offset = 0;
1618 union all_known_options *all_options;
1619 char got_mss_option = 0;
1620
1621 while (offset < optionsize) {
1622 all_options = (union all_known_options *)(optionsloc + offset);
1623 switch (all_options->as_base.optionnum) {
6492cdf3
FL		 1624 case OPTION_NUMBER_END:
1625 offset = optionsize;
1626 break;
1627 case OPTION_NUMBER_NONE:
1628 offset += 1;
1629 continue;
1630 case OPTION_NUMBER_MSS:
1631 nes_debug(NES_DBG_CM, "%s: MSS Length: %d Offset: %d "
615eb715
TN		 1632 "Size: %d\n", __func__,
1633 all_options->as_mss.length, offset, optionsize);
6492cdf3
FL		 1634 got_mss_option = 1;
1635 if (all_options->as_mss.length != 4) {
1636 return 1;
1637 } else {
1638 tmp = ntohs(all_options->as_mss.mss);
1639 if (tmp > 0 && tmp <
615eb715 1640 cm_node->tcp_cntxt.mss)
6492cdf3
FL		 1641 cm_node->tcp_cntxt.mss = tmp;
1642 }
1643 break;
1644 case OPTION_NUMBER_WINDOW_SCALE:
1645 cm_node->tcp_cntxt.snd_wscale =
1646 all_options->as_windowscale.shiftcount;
1647 break;
6492cdf3
FL		 1648 default:
1649 nes_debug(NES_DBG_CM, "TCP Option not understood: %x\n",
615eb715 1650 all_options->as_base.optionnum);
6492cdf3 1651 break;
3c2d774c
GS		 1652 }
1653 offset += all_options->as_base.length;
1654 }
1655 if ((!got_mss_option) && (syn_packet))
1656 cm_node->tcp_cntxt.mss = NES_CM_DEFAULT_MSS;
1657 return 0;
1658}
1659
6492cdf3
FL		 1660static void drop_packet(struct sk_buff *skb)
1661{
1662 atomic_inc(&cm_accel_dropped_pkts);
1663 dev_kfree_skb_any(skb);
1664}
3c2d774c 1665
9d5ab133 1666static void handle_fin_pkt(struct nes_cm_node *cm_node)
3c2d774c 1667{
6492cdf3 1668 nes_debug(NES_DBG_CM, "Received FIN, cm_node = %p, state = %u. "
615eb715
TN		 1669 "refcnt=%d\n", cm_node, cm_node->state,
1670 atomic_read(&cm_node->ref_count));
6492cdf3
FL		 1671 switch (cm_node->state) {
1672 case NES_CM_STATE_SYN_RCVD:
1673 case NES_CM_STATE_SYN_SENT:
1674 case NES_CM_STATE_ESTABLISHED:
9d5ab133 1675 case NES_CM_STATE_MPAREJ_RCVD:
109d67e4
FL		 1676 cm_node->tcp_cntxt.rcv_nxt++;
1677 cleanup_retrans_entry(cm_node);
6492cdf3 1678 cm_node->state = NES_CM_STATE_LAST_ACK;
9d5ab133 1679 send_fin(cm_node, NULL);
6492cdf3 1680 break;
b1190d3e
FL		 1681 case NES_CM_STATE_MPAREQ_SENT:
1682 create_event(cm_node, NES_CM_EVENT_ABORTED);
1683 cm_node->tcp_cntxt.rcv_nxt++;
1684 cleanup_retrans_entry(cm_node);
1685 cm_node->state = NES_CM_STATE_CLOSED;
1686 add_ref_cm_node(cm_node);
1687 send_reset(cm_node, NULL);
1688 break;
6492cdf3 1689 case NES_CM_STATE_FIN_WAIT1:
109d67e4
FL		 1690 cm_node->tcp_cntxt.rcv_nxt++;
1691 cleanup_retrans_entry(cm_node);
6492cdf3 1692 cm_node->state = NES_CM_STATE_CLOSING;
9d5ab133 1693 send_ack(cm_node, NULL);
25985edc 1694 /* Wait for ACK as this is simultaneous close..
9d5ab133
FL		 1695 * After we receive ACK, do not send anything..
1696 * Just rm the node.. Done.. */
6492cdf3
FL		 1697 break;
1698 case NES_CM_STATE_FIN_WAIT2:
109d67e4
FL		 1699 cm_node->tcp_cntxt.rcv_nxt++;
1700 cleanup_retrans_entry(cm_node);
6492cdf3 1701 cm_node->state = NES_CM_STATE_TIME_WAIT;
9d5ab133
FL		 1702 send_ack(cm_node, NULL);
1703 schedule_nes_timer(cm_node, NULL, NES_TIMER_TYPE_CLOSE, 1, 0);
1704 break;
1705 case NES_CM_STATE_TIME_WAIT:
109d67e4
FL		 1706 cm_node->tcp_cntxt.rcv_nxt++;
1707 cleanup_retrans_entry(cm_node);
6492cdf3 1708 cm_node->state = NES_CM_STATE_CLOSED;
9d5ab133 1709 rem_ref_cm_node(cm_node->cm_core, cm_node);
6492cdf3
FL		 1710 break;
1711 case NES_CM_STATE_TSA:
1712 default:
1713 nes_debug(NES_DBG_CM, "Error Rcvd FIN for node-%p state = %d\n",
1714 cm_node, cm_node->state);
6492cdf3 1715 break;
3c2d774c 1716 }
6492cdf3 1717}
3c2d774c 1718
3c2d774c 1719
6492cdf3
FL		 1720static void handle_rst_pkt(struct nes_cm_node *cm_node, struct sk_buff *skb,
1721 struct tcphdr *tcph)
1722{
3c2d774c 1723
6492cdf3
FL		 1724 int reset = 0; /* whether to send reset in case of err.. */
1725 atomic_inc(&cm_resets_recvd);
1726 nes_debug(NES_DBG_CM, "Received Reset, cm_node = %p, state = %u."
1727 " refcnt=%d\n", cm_node, cm_node->state,
1728 atomic_read(&cm_node->ref_count));
1729 cleanup_retrans_entry(cm_node);
1730 switch (cm_node->state) {
1731 case NES_CM_STATE_SYN_SENT:
1732 case NES_CM_STATE_MPAREQ_SENT:
1733 nes_debug(NES_DBG_CM, "%s[%u] create abort for cm_node=%p "
1734 "listener=%p state=%d\n", __func__, __LINE__, cm_node,
1735 cm_node->listener, cm_node->state);
615eb715
TN		 1736 switch (cm_node->mpa_frame_rev) {
1737 case IETF_MPA_V2:
1738 cm_node->mpa_frame_rev = IETF_MPA_V1;
1739 /* send a syn and goto syn sent state */
1740 cm_node->state = NES_CM_STATE_SYN_SENT;
1741 if (send_syn(cm_node, 0, NULL)) {
1742 active_open_err(cm_node, skb, reset);
1743 }
1744 break;
1745 case IETF_MPA_V1:
1746 default:
1747 active_open_err(cm_node, skb, reset);
1748 break;
1749 }
6492cdf3 1750 break;
183ecfa3 1751 case NES_CM_STATE_MPAREQ_RCVD:
4d8d6389 1752 atomic_inc(&cm_node->passive_state);
183ecfa3
FL		 1753 dev_kfree_skb_any(skb);
1754 break;
6492cdf3
FL		 1755 case NES_CM_STATE_ESTABLISHED:
1756 case NES_CM_STATE_SYN_RCVD:
1757 case NES_CM_STATE_LISTENING:
1758 nes_debug(NES_DBG_CM, "Bad state %s[%u]\n", __func__, __LINE__);
1759 passive_open_err(cm_node, skb, reset);
1760 break;
1761 case NES_CM_STATE_TSA:
183ecfa3
FL		 1762 active_open_err(cm_node, skb, reset);
1763 break;
1764 case NES_CM_STATE_CLOSED:
183ecfa3
FL		 1765 drop_packet(skb);
1766 break;
dae58728 1767 case NES_CM_STATE_FIN_WAIT2:
68237a0f 1768 case NES_CM_STATE_FIN_WAIT1:
109d67e4
FL		 1769 case NES_CM_STATE_LAST_ACK:
1770 cm_node->cm_id->rem_ref(cm_node->cm_id);
ea45c45b 1771 /* fall through */
9d5ab133 1772 case NES_CM_STATE_TIME_WAIT:
9d5ab133
FL		 1773 cm_node->state = NES_CM_STATE_CLOSED;
1774 rem_ref_cm_node(cm_node->cm_core, cm_node);
1775 drop_packet(skb);
1776 break;
6492cdf3 1777 default:
183ecfa3 1778 drop_packet(skb);
6492cdf3
FL		 1779 break;
1780 }
1781}
3c2d774c 1782
9d5ab133
FL		 1783
1784static void handle_rcv_mpa(struct nes_cm_node *cm_node, struct sk_buff *skb)
6492cdf3 1785{
615eb715 1786 int ret = 0;
6492cdf3
FL		 1787 int datasize = skb->len;
1788 u8 *dataloc = skb->data;
9d5ab133
FL		 1789
1790 enum nes_cm_event_type type = NES_CM_EVENT_UNKNOWN;
615eb715
TN		 1791 u32 res_type;
1792
9d5ab133
FL		 1793 ret = parse_mpa(cm_node, dataloc, &res_type, datasize);
1794 if (ret) {
6492cdf3 1795 nes_debug(NES_DBG_CM, "didn't like MPA Request\n");
9d5ab133 1796 if (cm_node->state == NES_CM_STATE_MPAREQ_SENT) {
6492cdf3 1797 nes_debug(NES_DBG_CM, "%s[%u] create abort for "
615eb715
TN		 1798 "cm_node=%p listener=%p state=%d\n", __func__,
1799 __LINE__, cm_node, cm_node->listener,
1800 cm_node->state);
6492cdf3
FL		 1801 active_open_err(cm_node, skb, 1);
1802 } else {
1803 passive_open_err(cm_node, skb, 1);
3c2d774c 1804 }
9d5ab133
FL		 1805 return;
1806 }
1807
1808 switch (cm_node->state) {
1809 case NES_CM_STATE_ESTABLISHED:
615eb715 1810 if (res_type == NES_MPA_REQUEST_REJECT)
9d5ab133 1811 /*BIG problem as we are receiving the MPA.. So should
615eb715
TN		 1812 * not be REJECT.. This is Passive Open.. We can
1813 * only receive it Reject for Active Open...*/
9d5ab133 1814 WARN_ON(1);
9d5ab133
FL		 1815 cm_node->state = NES_CM_STATE_MPAREQ_RCVD;
1816 type = NES_CM_EVENT_MPA_REQ;
1817 atomic_set(&cm_node->passive_state,
615eb715 1818 NES_PASSIVE_STATE_INDICATED);
9d5ab133
FL		 1819 break;
1820 case NES_CM_STATE_MPAREQ_SENT:
109d67e4 1821 cleanup_retrans_entry(cm_node);
9d5ab133
FL		 1822 if (res_type == NES_MPA_REQUEST_REJECT) {
1823 type = NES_CM_EVENT_MPA_REJECT;
1824 cm_node->state = NES_CM_STATE_MPAREJ_RCVD;
1825 } else {
1826 type = NES_CM_EVENT_CONNECTED;
6492cdf3 1827 cm_node->state = NES_CM_STATE_TSA;
9d5ab133 1828 }
f863de7d 1829 send_ack(cm_node, NULL);
9d5ab133
FL		 1830 break;
1831 default:
1832 WARN_ON(1);
1833 break;
6492cdf3 1834 }
9d5ab133
FL		 1835 dev_kfree_skb_any(skb);
1836 create_event(cm_node, type);
6492cdf3
FL		 1837}
1838
1839static void indicate_pkt_err(struct nes_cm_node *cm_node, struct sk_buff *skb)
1840{
1841 switch (cm_node->state) {
1842 case NES_CM_STATE_SYN_SENT:
1843 case NES_CM_STATE_MPAREQ_SENT:
1844 nes_debug(NES_DBG_CM, "%s[%u] create abort for cm_node=%p "
615eb715
TN		 1845 "listener=%p state=%d\n", __func__, __LINE__, cm_node,
1846 cm_node->listener, cm_node->state);
6492cdf3
FL		 1847 active_open_err(cm_node, skb, 1);
1848 break;
1849 case NES_CM_STATE_ESTABLISHED:
1850 case NES_CM_STATE_SYN_RCVD:
1851 passive_open_err(cm_node, skb, 1);
1852 break;
1853 case NES_CM_STATE_TSA:
1854 default:
1855 drop_packet(skb);
3c2d774c 1856 }
6492cdf3
FL		 1857}
1858
1859static int check_syn(struct nes_cm_node *cm_node, struct tcphdr *tcph,
615eb715 1860 struct sk_buff *skb)
6492cdf3
FL		 1861{
1862 int err;
1863
615eb715 1864 err = ((ntohl(tcph->ack_seq) == cm_node->tcp_cntxt.loc_seq_num)) ? 0 : 1;
6492cdf3
FL		 1865 if (err)
1866 active_open_err(cm_node, skb, 1);
1867
1868 return err;
1869}
1870
1871static int check_seq(struct nes_cm_node *cm_node, struct tcphdr *tcph,
615eb715 1872 struct sk_buff *skb)
6492cdf3
FL		 1873{
1874 int err = 0;
1875 u32 seq;
1876 u32 ack_seq;
1877 u32 loc_seq_num = cm_node->tcp_cntxt.loc_seq_num;
1878 u32 rcv_nxt = cm_node->tcp_cntxt.rcv_nxt;
1879 u32 rcv_wnd;
615eb715 1880
6492cdf3
FL		 1881 seq = ntohl(tcph->seq);
1882 ack_seq = ntohl(tcph->ack_seq);
1883 rcv_wnd = cm_node->tcp_cntxt.rcv_wnd;
1884 if (ack_seq != loc_seq_num)
1885 err = 1;
615eb715 1886 else if (!between(seq, rcv_nxt, (rcv_nxt + rcv_wnd)))
6492cdf3
FL		 1887 err = 1;
1888 if (err) {
1889 nes_debug(NES_DBG_CM, "%s[%u] create abort for cm_node=%p "
615eb715
TN		 1890 "listener=%p state=%d\n", __func__, __LINE__, cm_node,
1891 cm_node->listener, cm_node->state);
6492cdf3
FL		 1892 indicate_pkt_err(cm_node, skb);
1893 nes_debug(NES_DBG_CM, "seq ERROR cm_node =%p seq=0x%08X "
615eb715
TN		 1894 "rcv_nxt=0x%08X rcv_wnd=0x%x\n", cm_node, seq, rcv_nxt,
1895 rcv_wnd);
6492cdf3
FL		 1896 }
1897 return err;
1898}
1899
1900/*
1901 * handle_syn_pkt() is for Passive node. The syn packet is received when a node
1902 * is created with a listener or it may comein as rexmitted packet which in
1903 * that case will be just dropped.
1904 */
6492cdf3 1905static void handle_syn_pkt(struct nes_cm_node *cm_node, struct sk_buff *skb,
615eb715 1906 struct tcphdr *tcph)
6492cdf3
FL		 1907{
1908 int ret;
1909 u32 inc_sequence;
1910 int optionsize;
3c2d774c
GS		 1911
1912 optionsize = (tcph->doff << 2) - sizeof(struct tcphdr);
abb77256 1913 skb_trim(skb, 0);
6492cdf3 1914 inc_sequence = ntohl(tcph->seq);
3c2d774c 1915
6492cdf3
FL		 1916 switch (cm_node->state) {
1917 case NES_CM_STATE_SYN_SENT:
1918 case NES_CM_STATE_MPAREQ_SENT:
1919 /* Rcvd syn on active open connection*/
1920 active_open_err(cm_node, skb, 1);
1921 break;
1922 case NES_CM_STATE_LISTENING:
1923 /* Passive OPEN */
6492cdf3 1924 if (atomic_read(&cm_node->listener->pend_accepts_cnt) >
615eb715 1925 cm_node->listener->backlog) {
6492cdf3 1926 nes_debug(NES_DBG_CM, "drop syn due to backlog "
615eb715 1927 "pressure \n");
6492cdf3
FL		 1928 cm_backlog_drops++;
1929 passive_open_err(cm_node, skb, 0);
1930 break;
1931 }
1932 ret = handle_tcp_options(cm_node, tcph, skb, optionsize,
615eb715 1933 1);
6492cdf3
FL		 1934 if (ret) {
1935 passive_open_err(cm_node, skb, 0);
1936 /* drop pkt */
1937 break;
1938 }
1939 cm_node->tcp_cntxt.rcv_nxt = inc_sequence + 1;
1940 BUG_ON(cm_node->send_entry);
9d5ab133
FL		 1941 cm_node->accept_pend = 1;
1942 atomic_inc(&cm_node->listener->pend_accepts_cnt);
1943
6492cdf3
FL		 1944 cm_node->state = NES_CM_STATE_SYN_RCVD;
1945 send_syn(cm_node, 1, skb);
1946 break;
abb77256
FL		 1947 case NES_CM_STATE_CLOSED:
1948 cleanup_retrans_entry(cm_node);
886f98a3 1949 add_ref_cm_node(cm_node);
abb77256
FL		 1950 send_reset(cm_node, skb);
1951 break;
6492cdf3
FL		 1952 case NES_CM_STATE_TSA:
1953 case NES_CM_STATE_ESTABLISHED:
1954 case NES_CM_STATE_FIN_WAIT1:
1955 case NES_CM_STATE_FIN_WAIT2:
1956 case NES_CM_STATE_MPAREQ_RCVD:
1957 case NES_CM_STATE_LAST_ACK:
1958 case NES_CM_STATE_CLOSING:
1959 case NES_CM_STATE_UNKNOWN:
6492cdf3
FL		 1960 default:
1961 drop_packet(skb);
1962 break;
1963 }
1964}
1965
1966static void handle_synack_pkt(struct nes_cm_node *cm_node, struct sk_buff *skb,
615eb715 1967 struct tcphdr *tcph)
6492cdf3 1968{
6492cdf3
FL		 1969 int ret;
1970 u32 inc_sequence;
1971 int optionsize;
1972
1973 optionsize = (tcph->doff << 2) - sizeof(struct tcphdr);
abb77256 1974 skb_trim(skb, 0);
6492cdf3
FL		 1975 inc_sequence = ntohl(tcph->seq);
1976 switch (cm_node->state) {
1977 case NES_CM_STATE_SYN_SENT:
9d5ab133 1978 cleanup_retrans_entry(cm_node);
6492cdf3
FL		 1979 /* active open */
1980 if (check_syn(cm_node, tcph, skb))
1981 return;
1982 cm_node->tcp_cntxt.rem_ack_num = ntohl(tcph->ack_seq);
1983 /* setup options */
1984 ret = handle_tcp_options(cm_node, tcph, skb, optionsize, 0);
1985 if (ret) {
1986 nes_debug(NES_DBG_CM, "cm_node=%p tcp_options failed\n",
615eb715 1987 cm_node);
6492cdf3
FL		 1988 break;
1989 }
1990 cleanup_retrans_entry(cm_node);
1991 cm_node->tcp_cntxt.rcv_nxt = inc_sequence + 1;
1992 send_mpa_request(cm_node, skb);
1993 cm_node->state = NES_CM_STATE_MPAREQ_SENT;
1994 break;
1995 case NES_CM_STATE_MPAREQ_RCVD:
1996 /* passive open, so should not be here */
1997 passive_open_err(cm_node, skb, 1);
1998 break;
abb77256 1999 case NES_CM_STATE_LISTENING:
886f98a3
FL		 2000 cm_node->tcp_cntxt.loc_seq_num = ntohl(tcph->ack_seq);
2001 cleanup_retrans_entry(cm_node);
2002 cm_node->state = NES_CM_STATE_CLOSED;
2003 send_reset(cm_node, skb);
2004 break;
abb77256
FL		 2005 case NES_CM_STATE_CLOSED:
2006 cm_node->tcp_cntxt.loc_seq_num = ntohl(tcph->ack_seq);
2007 cleanup_retrans_entry(cm_node);
886f98a3 2008 add_ref_cm_node(cm_node);
abb77256
FL		 2009 send_reset(cm_node, skb);
2010 break;
6492cdf3
FL		 2011 case NES_CM_STATE_ESTABLISHED:
2012 case NES_CM_STATE_FIN_WAIT1:
2013 case NES_CM_STATE_FIN_WAIT2:
2014 case NES_CM_STATE_LAST_ACK:
2015 case NES_CM_STATE_TSA:
2016 case NES_CM_STATE_CLOSING:
2017 case NES_CM_STATE_UNKNOWN:
6492cdf3
FL		 2018 case NES_CM_STATE_MPAREQ_SENT:
2019 default:
2020 drop_packet(skb);
2021 break;
2022 }
2023}
3c2d774c 2024
109d67e4 2025static int handle_ack_pkt(struct nes_cm_node *cm_node, struct sk_buff *skb,
615eb715 2026 struct tcphdr *tcph)
6492cdf3
FL		 2027{
2028 int datasize = 0;
2029 u32 inc_sequence;
109d67e4 2030 int ret = 0;
abb77256 2031 int optionsize;
615eb715 2032
abb77256 2033 optionsize = (tcph->doff << 2) - sizeof(struct tcphdr);
abb77256 2034
6492cdf3 2035 if (check_seq(cm_node, tcph, skb))
109d67e4 2036 return -EINVAL;
6492cdf3
FL		 2037
2038 skb_pull(skb, tcph->doff << 2);
3c2d774c 2039 inc_sequence = ntohl(tcph->seq);
6492cdf3 2040 datasize = skb->len;
6492cdf3
FL		 2041 switch (cm_node->state) {
2042 case NES_CM_STATE_SYN_RCVD:
2043 /* Passive OPEN */
109d67e4 2044 cleanup_retrans_entry(cm_node);
abb77256
FL		 2045 ret = handle_tcp_options(cm_node, tcph, skb, optionsize, 1);
2046 if (ret)
2047 break;
6492cdf3
FL		 2048 cm_node->tcp_cntxt.rem_ack_num = ntohl(tcph->ack_seq);
2049 cm_node->state = NES_CM_STATE_ESTABLISHED;
2050 if (datasize) {
2051 cm_node->tcp_cntxt.rcv_nxt = inc_sequence + datasize;
9d5ab133 2052 handle_rcv_mpa(cm_node, skb);
615eb715 2053 } else { /* rcvd ACK only */
6492cdf3 2054 dev_kfree_skb_any(skb);
615eb715 2055 }
6492cdf3
FL		 2056 break;
2057 case NES_CM_STATE_ESTABLISHED:
2058 /* Passive OPEN */
9d5ab133 2059 cleanup_retrans_entry(cm_node);
6492cdf3
FL		 2060 if (datasize) {
2061 cm_node->tcp_cntxt.rcv_nxt = inc_sequence + datasize;
9d5ab133 2062 handle_rcv_mpa(cm_node, skb);
615eb715 2063 } else {
6492cdf3 2064 drop_packet(skb);
615eb715 2065 }
6492cdf3
FL		 2066 break;
2067 case NES_CM_STATE_MPAREQ_SENT:
2068 cm_node->tcp_cntxt.rem_ack_num = ntohl(tcph->ack_seq);
2069 if (datasize) {
2070 cm_node->tcp_cntxt.rcv_nxt = inc_sequence + datasize;
9d5ab133 2071 handle_rcv_mpa(cm_node, skb);
615eb715 2072 } else { /* Could be just an ack pkt.. */
6492cdf3 2073 dev_kfree_skb_any(skb);
615eb715 2074 }
6492cdf3 2075 break;
abb77256 2076 case NES_CM_STATE_LISTENING:
886f98a3
FL		 2077 cleanup_retrans_entry(cm_node);
2078 cm_node->state = NES_CM_STATE_CLOSED;
2079 send_reset(cm_node, skb);
2080 break;
abb77256
FL		 2081 case NES_CM_STATE_CLOSED:
2082 cleanup_retrans_entry(cm_node);
886f98a3 2083 add_ref_cm_node(cm_node);
abb77256
FL		 2084 send_reset(cm_node, skb);
2085 break;
9d5ab133 2086 case NES_CM_STATE_LAST_ACK:
109d67e4 2087 case NES_CM_STATE_CLOSING:
9d5ab133
FL		 2088 cleanup_retrans_entry(cm_node);
2089 cm_node->state = NES_CM_STATE_CLOSED;
2090 cm_node->cm_id->rem_ref(cm_node->cm_id);
9d5ab133
FL		 2091 rem_ref_cm_node(cm_node->cm_core, cm_node);
2092 drop_packet(skb);
2093 break;
6492cdf3 2094 case NES_CM_STATE_FIN_WAIT1:
9d5ab133
FL		 2095 cleanup_retrans_entry(cm_node);
2096 drop_packet(skb);
2097 cm_node->state = NES_CM_STATE_FIN_WAIT2;
2098 break;
6492cdf3
FL		 2099 case NES_CM_STATE_SYN_SENT:
2100 case NES_CM_STATE_FIN_WAIT2:
2101 case NES_CM_STATE_TSA:
6492cdf3 2102 case NES_CM_STATE_MPAREQ_RCVD:
6492cdf3
FL		 2103 case NES_CM_STATE_UNKNOWN:
2104 default:
109d67e4 2105 cleanup_retrans_entry(cm_node);
6492cdf3
FL		 2106 drop_packet(skb);
2107 break;
3c2d774c 2108 }
109d67e4 2109 return ret;
6492cdf3 2110}
3c2d774c 2111
3c2d774c
GS		 2112
2113
6492cdf3 2114static int handle_tcp_options(struct nes_cm_node *cm_node, struct tcphdr *tcph,
615eb715 2115 struct sk_buff *skb, int optionsize, int passive)
6492cdf3
FL		 2116{
2117 u8 *optionsloc = (u8 *)&tcph[1];
615eb715 2118
3c2d774c 2119 if (optionsize) {
6492cdf3 2120 if (process_options(cm_node, optionsloc, optionsize,
615eb715 2121 (u32)tcph->syn)) {
6492cdf3 2122 nes_debug(NES_DBG_CM, "%s: Node %p, Sending RESET\n",
615eb715 2123 __func__, cm_node);
6492cdf3 2124 if (passive)
abb77256 2125 passive_open_err(cm_node, skb, 1);
6492cdf3 2126 else
abb77256 2127 active_open_err(cm_node, skb, 1);
6492cdf3 2128 return 1;
3c2d774c 2129 }
6492cdf3 2130 }
3c2d774c
GS		 2131
2132 cm_node->tcp_cntxt.snd_wnd = ntohs(tcph->window) <<
615eb715 2133 cm_node->tcp_cntxt.snd_wscale;
3c2d774c 2134
6492cdf3 2135 if (cm_node->tcp_cntxt.snd_wnd > cm_node->tcp_cntxt.max_snd_wnd)
3c2d774c 2136 cm_node->tcp_cntxt.max_snd_wnd = cm_node->tcp_cntxt.snd_wnd;
6492cdf3
FL		 2137 return 0;
2138}
3c2d774c 2139
6492cdf3
FL		 2140/*
2141 * active_open_err() will send reset() if flag set..
2142 * It will also send ABORT event.
2143 */
6492cdf3 2144static void active_open_err(struct nes_cm_node *cm_node, struct sk_buff *skb,
615eb715 2145 int reset)
6492cdf3
FL		 2146{
2147 cleanup_retrans_entry(cm_node);
2148 if (reset) {
2149 nes_debug(NES_DBG_CM, "ERROR active err called for cm_node=%p, "
615eb715 2150 "state=%d\n", cm_node, cm_node->state);
6492cdf3
FL		 2151 add_ref_cm_node(cm_node);
2152 send_reset(cm_node, skb);
615eb715 2153 } else {
6492cdf3 2154 dev_kfree_skb_any(skb);
615eb715 2155 }
3c2d774c 2156
6492cdf3
FL		 2157 cm_node->state = NES_CM_STATE_CLOSED;
2158 create_event(cm_node, NES_CM_EVENT_ABORTED);
2159}
3c2d774c 2160
6492cdf3
FL		 2161/*
2162 * passive_open_err() will either do a reset() or will free up the skb and
2163 * remove the cm_node.
2164 */
6492cdf3 2165static void passive_open_err(struct nes_cm_node *cm_node, struct sk_buff *skb,
615eb715 2166 int reset)
6492cdf3
FL		 2167{
2168 cleanup_retrans_entry(cm_node);
2169 cm_node->state = NES_CM_STATE_CLOSED;
2170 if (reset) {
2171 nes_debug(NES_DBG_CM, "passive_open_err sending RST for "
615eb715 2172 "cm_node=%p state =%d\n", cm_node, cm_node->state);
6492cdf3
FL		 2173 send_reset(cm_node, skb);
2174 } else {
2175 dev_kfree_skb_any(skb);
2176 rem_ref_cm_node(cm_node->cm_core, cm_node);
3c2d774c 2177 }
6492cdf3 2178}
3c2d774c 2179
6492cdf3
FL		 2180/*
2181 * free_retrans_entry() routines assumes that the retrans_list_lock has
2182 * been acquired before calling.
2183 */
2184static void free_retrans_entry(struct nes_cm_node *cm_node)
2185{
2186 struct nes_timer_entry *send_entry;
615eb715 2187
6492cdf3
FL		 2188 send_entry = cm_node->send_entry;
2189 if (send_entry) {
2190 cm_node->send_entry = NULL;
2191 dev_kfree_skb_any(send_entry->skb);
2192 kfree(send_entry);
2193 rem_ref_cm_node(cm_node->cm_core, cm_node);
3c2d774c 2194 }
6492cdf3 2195}
3c2d774c 2196
6492cdf3
FL		 2197static void cleanup_retrans_entry(struct nes_cm_node *cm_node)
2198{
2199 unsigned long flags;
3c2d774c 2200
6492cdf3
FL		 2201 spin_lock_irqsave(&cm_node->retrans_list_lock, flags);
2202 free_retrans_entry(cm_node);
2203 spin_unlock_irqrestore(&cm_node->retrans_list_lock, flags);
3c2d774c
GS		 2204}
2205
6492cdf3
FL		 2206/**
2207 * process_packet
2208 * Returns skb if to be freed, else it will return NULL if already used..
2209 */
2210static void process_packet(struct nes_cm_node *cm_node, struct sk_buff *skb,
615eb715 2211 struct nes_cm_core *cm_core)
6492cdf3 2212{
615eb715 2213 enum nes_tcpip_pkt_type pkt_type = NES_PKT_TYPE_UNKNOWN;
6492cdf3 2214 struct tcphdr *tcph = tcp_hdr(skb);
615eb715 2215 u32 fin_set = 0;
109d67e4 2216 int ret = 0;
615eb715 2217
6492cdf3
FL		 2218 skb_pull(skb, ip_hdr(skb)->ihl << 2);
2219
2220 nes_debug(NES_DBG_CM, "process_packet: cm_node=%p state =%d syn=%d "
615eb715
TN		 2221 "ack=%d rst=%d fin=%d\n", cm_node, cm_node->state, tcph->syn,
2222 tcph->ack, tcph->rst, tcph->fin);
6492cdf3 2223
615eb715 2224 if (tcph->rst) {
6492cdf3 2225 pkt_type = NES_PKT_TYPE_RST;
615eb715 2226 } else if (tcph->syn) {
6492cdf3
FL		 2227 pkt_type = NES_PKT_TYPE_SYN;
2228 if (tcph->ack)
2229 pkt_type = NES_PKT_TYPE_SYNACK;
615eb715 2230 } else if (tcph->ack) {
6492cdf3 2231 pkt_type = NES_PKT_TYPE_ACK;
615eb715 2232 }
9d5ab133
FL		 2233 if (tcph->fin)
2234 fin_set = 1;
6492cdf3
FL		 2235
2236 switch (pkt_type) {
2237 case NES_PKT_TYPE_SYN:
2238 handle_syn_pkt(cm_node, skb, tcph);
2239 break;
2240 case NES_PKT_TYPE_SYNACK:
2241 handle_synack_pkt(cm_node, skb, tcph);
2242 break;
2243 case NES_PKT_TYPE_ACK:
109d67e4
FL		 2244 ret = handle_ack_pkt(cm_node, skb, tcph);
2245 if (fin_set && !ret)
9d5ab133 2246 handle_fin_pkt(cm_node);
6492cdf3
FL		 2247 break;
2248 case NES_PKT_TYPE_RST:
2249 handle_rst_pkt(cm_node, skb, tcph);
2250 break;
6492cdf3 2251 default:
109d67e4 2252 if ((fin_set) && (!check_seq(cm_node, tcph, skb)))
9d5ab133 2253 handle_fin_pkt(cm_node);
109d67e4 2254 drop_packet(skb);
6492cdf3
FL		 2255 break;
2256 }
2257}
3c2d774c
GS		 2258
2259/**
2260 * mini_cm_listen - create a listen node with params
2261 */
2262static struct nes_cm_listener *mini_cm_listen(struct nes_cm_core *cm_core,
5647263c 2263 struct nes_vnic *nesvnic, struct nes_cm_info *cm_info)
3c2d774c
GS		 2264{
2265 struct nes_cm_listener *listener;
2266 unsigned long flags;
2267
2268 nes_debug(NES_DBG_CM, "Search for 0x%08x : 0x%04x\n",
615eb715 2269 cm_info->loc_addr, cm_info->loc_port);
3c2d774c
GS		 2270
2271 /* cannot have multiple matching listeners */
5647263c 2272 listener = find_listener(cm_core, cm_info->loc_addr, cm_info->loc_port,
6a0dde89 2273 NES_CM_LISTENER_EITHER_STATE);
5647263c 2274
3c2d774c
GS		 2275 if (listener && listener->listener_state == NES_CM_LISTENER_ACTIVE_STATE) {
2276 /* find automatically incs ref count ??? */
2277 atomic_dec(&listener->ref_count);
2278 nes_debug(NES_DBG_CM, "Not creating listener since it already exists\n");
2279 return NULL;
2280 }
2281
2282 if (!listener) {
2283 /* create a CM listen node (1/2 node to compare incoming traffic to) */
2284 listener = kzalloc(sizeof(*listener), GFP_ATOMIC);
2e65835a 2285 if (!listener)
3c2d774c 2286 return NULL;
3c2d774c 2287
5647263c
TN		 2288 listener->loc_addr = cm_info->loc_addr;
2289 listener->loc_port = cm_info->loc_port;
3c2d774c
GS		 2290 listener->reused_node = 0;
2291
2292 atomic_set(&listener->ref_count, 1);
2293 }
2294 /* pasive case */
2295 /* find already inc'ed the ref count */
2296 else {
2297 listener->reused_node = 1;
2298 }
2299
2300 listener->cm_id = cm_info->cm_id;
2301 atomic_set(&listener->pend_accepts_cnt, 0);
2302 listener->cm_core = cm_core;
2303 listener->nesvnic = nesvnic;
2304 atomic_inc(&cm_core->node_cnt);
3c2d774c 2305
3c2d774c
GS		 2306 listener->conn_type = cm_info->conn_type;
2307 listener->backlog = cm_info->backlog;
2308 listener->listener_state = NES_CM_LISTENER_ACTIVE_STATE;
2309
2310 if (!listener->reused_node) {
2311 spin_lock_irqsave(&cm_core->listen_list_lock, flags);
2312 list_add(&listener->list, &cm_core->listen_list.list);
2313 spin_unlock_irqrestore(&cm_core->listen_list_lock, flags);
2314 atomic_inc(&cm_core->listen_node_cnt);
2315 }
2316
2317 nes_debug(NES_DBG_CM, "Api - listen(): addr=0x%08X, port=0x%04x,"
615eb715
TN		 2318 " listener = %p, backlog = %d, cm_id = %p.\n",
2319 cm_info->loc_addr, cm_info->loc_port,
2320 listener, listener->backlog, listener->cm_id);
3c2d774c
GS		 2321
2322 return listener;
2323}
2324
2325
2326/**
2327 * mini_cm_connect - make a connection node with params
2328 */
54c86a8c 2329static struct nes_cm_node *mini_cm_connect(struct nes_cm_core *cm_core,
615eb715
TN		 2330 struct nes_vnic *nesvnic, u16 private_data_len,
2331 void *private_data, struct nes_cm_info *cm_info)
3c2d774c
GS		 2332{
2333 int ret = 0;
2334 struct nes_cm_node *cm_node;
2335 struct nes_cm_listener *loopbackremotelistener;
2336 struct nes_cm_node *loopbackremotenode;
2337 struct nes_cm_info loopback_cm_info;
615eb715 2338 u8 *start_buff;
3c2d774c
GS		 2339
2340 /* create a CM connection node */
2341 cm_node = make_cm_node(cm_core, nesvnic, cm_info, NULL);
2342 if (!cm_node)
2343 return NULL;
2344
7495ab68 2345 /* set our node side to client (active) side */
3c2d774c
GS		 2346 cm_node->tcp_cntxt.client = 1;
2347 cm_node->tcp_cntxt.rcv_wscale = NES_CM_DEFAULT_RCV_WND_SCALE;
2348
2349 if (cm_info->loc_addr == cm_info->rem_addr) {
6492cdf3 2350 loopbackremotelistener = find_listener(cm_core,
6a0dde89
FL		 2351 cm_node->loc_addr, cm_node->rem_port,
2352 NES_CM_LISTENER_ACTIVE_STATE);
3c2d774c
GS		 2353 if (loopbackremotelistener == NULL) {
2354 create_event(cm_node, NES_CM_EVENT_ABORTED);
2355 } else {
3c2d774c
GS		 2356 loopback_cm_info = *cm_info;
2357 loopback_cm_info.loc_port = cm_info->rem_port;
2358 loopback_cm_info.rem_port = cm_info->loc_port;
6a0dde89
FL		 2359 loopback_cm_info.loc_port =
2360 cm_info->rem_port;
2361 loopback_cm_info.rem_port =
2362 cm_info->loc_port;
3c2d774c 2363 loopback_cm_info.cm_id = loopbackremotelistener->cm_id;
6492cdf3 2364 loopbackremotenode = make_cm_node(cm_core, nesvnic,
615eb715 2365 &loopback_cm_info, loopbackremotelistener);
79fc3d74
FL		 2366 if (!loopbackremotenode) {
2367 rem_ref_cm_node(cm_node->cm_core, cm_node);
2368 return NULL;
2369 }
2370 atomic_inc(&cm_loopbacks);
3c2d774c 2371 loopbackremotenode->loopbackpartner = cm_node;
6492cdf3
FL		 2372 loopbackremotenode->tcp_cntxt.rcv_wscale =
2373 NES_CM_DEFAULT_RCV_WND_SCALE;
3c2d774c 2374 cm_node->loopbackpartner = loopbackremotenode;
6492cdf3 2375 memcpy(loopbackremotenode->mpa_frame_buf, private_data,
615eb715 2376 private_data_len);
6492cdf3 2377 loopbackremotenode->mpa_frame_size = private_data_len;
3c2d774c 2378
6492cdf3
FL		 2379 /* we are done handling this state. */
2380 /* set node to a TSA state */
3c2d774c 2381 cm_node->state = NES_CM_STATE_TSA;
6492cdf3
FL		 2382 cm_node->tcp_cntxt.rcv_nxt =
2383 loopbackremotenode->tcp_cntxt.loc_seq_num;
2384 loopbackremotenode->tcp_cntxt.rcv_nxt =
2385 cm_node->tcp_cntxt.loc_seq_num;
2386 cm_node->tcp_cntxt.max_snd_wnd =
2387 loopbackremotenode->tcp_cntxt.rcv_wnd;
2388 loopbackremotenode->tcp_cntxt.max_snd_wnd =
2389 cm_node->tcp_cntxt.rcv_wnd;
2390 cm_node->tcp_cntxt.snd_wnd =
2391 loopbackremotenode->tcp_cntxt.rcv_wnd;
2392 loopbackremotenode->tcp_cntxt.snd_wnd =
2393 cm_node->tcp_cntxt.rcv_wnd;
2394 cm_node->tcp_cntxt.snd_wscale =
2395 loopbackremotenode->tcp_cntxt.rcv_wscale;
2396 loopbackremotenode->tcp_cntxt.snd_wscale =
2397 cm_node->tcp_cntxt.rcv_wscale;
9d5ab133 2398 loopbackremotenode->state = NES_CM_STATE_MPAREQ_RCVD;
3c2d774c
GS		 2399 create_event(loopbackremotenode, NES_CM_EVENT_MPA_REQ);
2400 }
2401 return cm_node;
2402 }
2403
615eb715
TN		 2404 start_buff = &cm_node->mpa_frame_buf[0] + sizeof(struct ietf_mpa_v2);
2405 cm_node->mpa_frame_size = private_data_len;
6492cdf3 2406
615eb715 2407 memcpy(start_buff, private_data, private_data_len);
3c2d774c
GS		 2408
2409 /* send a syn and goto syn sent state */
2410 cm_node->state = NES_CM_STATE_SYN_SENT;
6492cdf3
FL		 2411 ret = send_syn(cm_node, 0, NULL);
2412
2413 if (ret) {
2414 /* error in sending the syn free up the cm_node struct */
2415 nes_debug(NES_DBG_CM, "Api - connect() FAILED: dest "
615eb715
TN		 2416 "addr=0x%08X, port=0x%04x, cm_node=%p, cm_id = %p.\n",
2417 cm_node->rem_addr, cm_node->rem_port, cm_node,
2418 cm_node->cm_id);
6492cdf3
FL		 2419 rem_ref_cm_node(cm_node->cm_core, cm_node);
2420 cm_node = NULL;
2421 }
3c2d774c 2422
615eb715 2423 if (cm_node) {
6492cdf3 2424 nes_debug(NES_DBG_CM, "Api - connect(): dest addr=0x%08X,"
615eb715
TN		 2425 "port=0x%04x, cm_node=%p, cm_id = %p.\n",
2426 cm_node->rem_addr, cm_node->rem_port, cm_node,
2427 cm_node->cm_id);
2428 }
3c2d774c
GS		 2429
2430 return cm_node;
2431}
2432
2433
2434/**
2435 * mini_cm_accept - accept a connection
2436 * This function is never called
2437 */
615eb715 2438static int mini_cm_accept(struct nes_cm_core *cm_core, struct nes_cm_node *cm_node)
3c2d774c
GS		 2439{
2440 return 0;
2441}
2442
2443
2444/**
2445 * mini_cm_reject - reject and teardown a connection
2446 */
615eb715 2447static int mini_cm_reject(struct nes_cm_core *cm_core, struct nes_cm_node *cm_node)
3c2d774c
GS		 2448{
2449 int ret = 0;
9d5ab133 2450 int err = 0;
183ecfa3 2451 int passive_state;
9d5ab133
FL		 2452 struct nes_cm_event event;
2453 struct iw_cm_id *cm_id = cm_node->cm_id;
2454 struct nes_cm_node *loopback = cm_node->loopbackpartner;
3c2d774c 2455
6492cdf3 2456 nes_debug(NES_DBG_CM, "%s cm_node=%p type=%d state=%d\n",
615eb715 2457 __func__, cm_node, cm_node->tcp_cntxt.client, cm_node->state);
3c2d774c 2458
6492cdf3
FL		 2459 if (cm_node->tcp_cntxt.client)
2460 return ret;
2461 cleanup_retrans_entry(cm_node);
3c2d774c 2462
9d5ab133
FL		 2463 if (!loopback) {
2464 passive_state = atomic_add_return(1, &cm_node->passive_state);
2465 if (passive_state == NES_SEND_RESET_EVENT) {
2466 cm_node->state = NES_CM_STATE_CLOSED;
2467 rem_ref_cm_node(cm_core, cm_node);
2468 } else {
c5a7d489
FL		 2469 if (cm_node->state == NES_CM_STATE_LISTENER_DESTROYED) {
2470 rem_ref_cm_node(cm_core, cm_node);
2471 } else {
2472 ret = send_mpa_reject(cm_node);
2473 if (ret) {
2474 cm_node->state = NES_CM_STATE_CLOSED;
2475 err = send_reset(cm_node, NULL);
2476 if (err)
2477 WARN_ON(1);
615eb715 2478 } else {
c5a7d489 2479 cm_id->add_ref(cm_id);
615eb715 2480 }
c5a7d489 2481 }
9d5ab133
FL		 2482 }
2483 } else {
2484 cm_node->cm_id = NULL;
c5a7d489
FL		 2485 if (cm_node->state == NES_CM_STATE_LISTENER_DESTROYED) {
2486 rem_ref_cm_node(cm_core, cm_node);
2487 rem_ref_cm_node(cm_core, loopback);
2488 } else {
2489 event.cm_node = loopback;
2490 event.cm_info.rem_addr = loopback->rem_addr;
2491 event.cm_info.loc_addr = loopback->loc_addr;
2492 event.cm_info.rem_port = loopback->rem_port;
2493 event.cm_info.loc_port = loopback->loc_port;
2494 event.cm_info.cm_id = loopback->cm_id;
2495 cm_event_mpa_reject(&event);
2496 rem_ref_cm_node(cm_core, cm_node);
2497 loopback->state = NES_CM_STATE_CLOSING;
9d5ab133 2498
c5a7d489
FL		 2499 cm_id = loopback->cm_id;
2500 rem_ref_cm_node(cm_core, loopback);
2501 cm_id->rem_ref(cm_id);
2502 }
9d5ab133
FL		 2503 }
2504
3c2d774c
GS		 2505 return ret;
2506}
2507
2508
2509/**
2510 * mini_cm_close
2511 */
1a855fbf 2512static int mini_cm_close(struct nes_cm_core *cm_core, struct nes_cm_node *cm_node)
3c2d774c
GS		 2513{
2514 int ret = 0;
2515
2516 if (!cm_core || !cm_node)
2517 return -EINVAL;
2518
2519 switch (cm_node->state) {
6492cdf3
FL		 2520 case NES_CM_STATE_SYN_RCVD:
2521 case NES_CM_STATE_SYN_SENT:
2522 case NES_CM_STATE_ONE_SIDE_ESTABLISHED:
2523 case NES_CM_STATE_ESTABLISHED:
2524 case NES_CM_STATE_ACCEPTING:
2525 case NES_CM_STATE_MPAREQ_SENT:
2526 case NES_CM_STATE_MPAREQ_RCVD:
2527 cleanup_retrans_entry(cm_node);
2528 send_reset(cm_node, NULL);
2529 break;
2530 case NES_CM_STATE_CLOSE_WAIT:
2531 cm_node->state = NES_CM_STATE_LAST_ACK;
2532 send_fin(cm_node, NULL);
2533 break;
2534 case NES_CM_STATE_FIN_WAIT1:
2535 case NES_CM_STATE_FIN_WAIT2:
2536 case NES_CM_STATE_LAST_ACK:
2537 case NES_CM_STATE_TIME_WAIT:
2538 case NES_CM_STATE_CLOSING:
2539 ret = -1;
2540 break;
2541 case NES_CM_STATE_LISTENING:
886f98a3
FL		 2542 cleanup_retrans_entry(cm_node);
2543 send_reset(cm_node, NULL);
2544 break;
2545 case NES_CM_STATE_MPAREJ_RCVD:
6492cdf3
FL		 2546 case NES_CM_STATE_UNKNOWN:
2547 case NES_CM_STATE_INITED:
2548 case NES_CM_STATE_CLOSED:
c5a7d489 2549 case NES_CM_STATE_LISTENER_DESTROYED:
6492cdf3
FL		 2550 ret = rem_ref_cm_node(cm_core, cm_node);
2551 break;
2552 case NES_CM_STATE_TSA:
2553 if (cm_node->send_entry)
2554 printk(KERN_ERR "ERROR Close got called from STATE_TSA "
615eb715 2555 "send_entry=%p\n", cm_node->send_entry);
6492cdf3
FL		 2556 ret = rem_ref_cm_node(cm_core, cm_node);
2557 break;
3c2d774c 2558 }
3c2d774c
GS		 2559 return ret;
2560}
2561
2562
2563/**
2564 * recv_pkt - recv an ETHERNET packet, and process it through CM
2565 * node state machine
2566 */
4a14f6a7 2567static int mini_cm_recv_pkt(struct nes_cm_core *cm_core,
615eb715 2568 struct nes_vnic *nesvnic, struct sk_buff *skb)
3c2d774c
GS		 2569{
2570 struct nes_cm_node *cm_node = NULL;
2571 struct nes_cm_listener *listener = NULL;
2572 struct iphdr *iph;
2573 struct tcphdr *tcph;
2574 struct nes_cm_info nfo;
4a14f6a7 2575 int skb_handled = 1;
03080e5c 2576 __be32 tmp_daddr, tmp_saddr;
3c2d774c 2577
6492cdf3 2578 if (!skb)
4a14f6a7 2579 return 0;
615eb715 2580 if (skb->len < sizeof(struct iphdr) + sizeof(struct tcphdr))
4a14f6a7 2581 return 0;
3c2d774c
GS		 2582
2583 iph = (struct iphdr *)skb->data;
2584 tcph = (struct tcphdr *)(skb->data + sizeof(struct iphdr));
3c2d774c
GS		 2585
2586 nfo.loc_addr = ntohl(iph->daddr);
2587 nfo.loc_port = ntohs(tcph->dest);
2588 nfo.rem_addr = ntohl(iph->saddr);
2589 nfo.rem_port = ntohs(tcph->source);
2590
03080e5c
HH		 2591 tmp_daddr = cpu_to_be32(iph->daddr);
2592 tmp_saddr = cpu_to_be32(iph->saddr);
2593
63779436 2594 nes_debug(NES_DBG_CM, "Received packet: dest=%pI4:0x%04X src=%pI4:0x%04X\n",
03080e5c 2595 &tmp_daddr, tcph->dest, &tmp_saddr, tcph->source);
3c2d774c 2596
6492cdf3
FL		 2597 do {
2598 cm_node = find_node(cm_core,
6a0dde89
FL		 2599 nfo.rem_port, nfo.rem_addr,
2600 nfo.loc_port, nfo.loc_addr);
3c2d774c 2601
3c2d774c 2602 if (!cm_node) {
6492cdf3
FL		 2603 /* Only type of packet accepted are for */
2604 /* the PASSIVE open (syn only) */
2605 if ((!tcph->syn) || (tcph->ack)) {
4a14f6a7 2606 skb_handled = 0;
6492cdf3
FL		 2607 break;
2608 }
6a0dde89
FL		 2609 listener = find_listener(cm_core, nfo.loc_addr,
2610 nfo.loc_port,
2611 NES_CM_LISTENER_ACTIVE_STATE);
4a14f6a7
FL		 2612 if (!listener) {
2613 nfo.cm_id = NULL;
2614 nfo.conn_type = 0;
2615 nes_debug(NES_DBG_CM, "Unable to find listener for the pkt\n");
2616 skb_handled = 0;
6492cdf3
FL		 2617 break;
2618 }
4a14f6a7
FL		 2619 nfo.cm_id = listener->cm_id;
2620 nfo.conn_type = listener->conn_type;
6492cdf3 2621 cm_node = make_cm_node(cm_core, nesvnic, &nfo,
615eb715 2622 listener);
6492cdf3
FL		 2623 if (!cm_node) {
2624 nes_debug(NES_DBG_CM, "Unable to allocate "
615eb715 2625 "node\n");
6492cdf3 2626 cm_packets_dropped++;
3c2d774c 2627 atomic_dec(&listener->ref_count);
6492cdf3
FL		 2628 dev_kfree_skb_any(skb);
2629 break;
3c2d774c 2630 }
6492cdf3
FL		 2631 if (!tcph->rst && !tcph->fin) {
2632 cm_node->state = NES_CM_STATE_LISTENING;
2633 } else {
2634 cm_packets_dropped++;
2635 rem_ref_cm_node(cm_core, cm_node);
2636 dev_kfree_skb_any(skb);
2637 break;
3c2d774c 2638 }
6492cdf3
FL		 2639 add_ref_cm_node(cm_node);
2640 } else if (cm_node->state == NES_CM_STATE_TSA) {
0f0bee8b
FL		 2641 if (cm_node->nesqp->pau_mode)
2642 nes_queue_mgt_skbs(skb, nesvnic, cm_node->nesqp);
2643 else {
2644 rem_ref_cm_node(cm_core, cm_node);
2645 atomic_inc(&cm_accel_dropped_pkts);
2646 dev_kfree_skb_any(skb);
2647 }
6492cdf3 2648 break;
3c2d774c 2649 }
4a14f6a7
FL		 2650 skb_reset_network_header(skb);
2651 skb_set_transport_header(skb, sizeof(*tcph));
2652 skb->len = ntohs(iph->tot_len);
6492cdf3
FL		 2653 process_packet(cm_node, skb, cm_core);
2654 rem_ref_cm_node(cm_core, cm_node);
2655 } while (0);
4a14f6a7 2656 return skb_handled;
3c2d774c
GS		 2657}
2658
2659
2660/**
2661 * nes_cm_alloc_core - allocate a top level instance of a cm core
2662 */
1a855fbf 2663static struct nes_cm_core *nes_cm_alloc_core(void)
3c2d774c 2664{
3c2d774c 2665 struct nes_cm_core *cm_core;
3c2d774c
GS		 2666
2667 /* setup the CM core */
2668 /* alloc top level core control structure */
2669 cm_core = kzalloc(sizeof(*cm_core), GFP_KERNEL);
2670 if (!cm_core)
2671 return NULL;
2672
2673 INIT_LIST_HEAD(&cm_core->connected_nodes);
2674 init_timer(&cm_core->tcp_timer);
2675 cm_core->tcp_timer.function = nes_cm_timer_tick;
2676
615eb715 2677 cm_core->mtu = NES_CM_DEFAULT_MTU;
3c2d774c
GS		 2678 cm_core->state = NES_CM_STATE_INITED;
2679 cm_core->free_tx_pkt_max = NES_CM_DEFAULT_FREE_PKTS;
2680
3c2d774c
GS		 2681 atomic_set(&cm_core->events_posted, 0);
2682
3c2d774c
GS		 2683 cm_core->api = &nes_cm_api;
2684
2685 spin_lock_init(&cm_core->ht_lock);
2686 spin_lock_init(&cm_core->listen_list_lock);
2687
2688 INIT_LIST_HEAD(&cm_core->listen_list.list);
2689
2690 nes_debug(NES_DBG_CM, "Init CM Core completed -- cm_core=%p\n", cm_core);
2691
2692 nes_debug(NES_DBG_CM, "Enable QUEUE EVENTS\n");
9e5df312 2693 cm_core->event_wq = alloc_ordered_workqueue("nesewq", 0);
a82268b3
IY		 2694 if (!cm_core->event_wq)
2695 goto out_free_cmcore;
3c2d774c
GS		 2696 cm_core->post_event = nes_cm_post_event;
2697 nes_debug(NES_DBG_CM, "Enable QUEUE DISCONNECTS\n");
9e5df312 2698 cm_core->disconn_wq = alloc_ordered_workqueue("nesdwq", 0);
a82268b3
IY		 2699 if (!cm_core->disconn_wq)
2700 goto out_free_wq;
3c2d774c
GS		 2701
2702 print_core(cm_core);
2703 return cm_core;
a82268b3
IY		 2704
2705out_free_wq:
2706 destroy_workqueue(cm_core->event_wq);
2707out_free_cmcore:
2708 kfree(cm_core);
2709 return NULL;
3c2d774c
GS		 2710}
2711
2712
2713/**
2714 * mini_cm_dealloc_core - deallocate a top level instance of a cm core
2715 */
1a855fbf 2716static int mini_cm_dealloc_core(struct nes_cm_core *cm_core)
3c2d774c
GS		 2717{
2718 nes_debug(NES_DBG_CM, "De-Alloc CM Core (%p)\n", cm_core);
2719
2720 if (!cm_core)
2721 return -EINVAL;
2722
2723 barrier();
2724
615eb715 2725 if (timer_pending(&cm_core->tcp_timer))
3c2d774c 2726 del_timer(&cm_core->tcp_timer);
3c2d774c
GS		 2727
2728 destroy_workqueue(cm_core->event_wq);
2729 destroy_workqueue(cm_core->disconn_wq);
2730 nes_debug(NES_DBG_CM, "\n");
2731 kfree(cm_core);
2732
2733 return 0;
2734}
2735
2736
2737/**
2738 * mini_cm_get
2739 */
1a855fbf 2740static int mini_cm_get(struct nes_cm_core *cm_core)
3c2d774c
GS		 2741{
2742 return cm_core->state;
2743}
2744
2745
2746/**
2747 * mini_cm_set
2748 */
1a855fbf 2749static int mini_cm_set(struct nes_cm_core *cm_core, u32 type, u32 value)
3c2d774c
GS		 2750{
2751 int ret = 0;
2752
2753 switch (type) {
9d5ab133
FL		 2754 case NES_CM_SET_PKT_SIZE:
2755 cm_core->mtu = value;
2756 break;
2757 case NES_CM_SET_FREE_PKT_Q_SIZE:
2758 cm_core->free_tx_pkt_max = value;
2759 break;
2760 default:
2761 /* unknown set option */
2762 ret = -EINVAL;
3c2d774c
GS		 2763 }
2764
2765 return ret;
2766}
2767
2768
2769/**
2770 * nes_cm_init_tsa_conn setup HW; MPA frames must be
2771 * successfully exchanged when this is called
2772 */
2773static int nes_cm_init_tsa_conn(struct nes_qp *nesqp, struct nes_cm_node *cm_node)
2774{
2775 int ret = 0;
2776
2777 if (!nesqp)
2778 return -EINVAL;
2779
2780 nesqp->nesqp_context->misc |= cpu_to_le32(NES_QPCONTEXT_MISC_IPV4 |
615eb715
TN		 2781 NES_QPCONTEXT_MISC_NO_NAGLE | NES_QPCONTEXT_MISC_DO_NOT_FRAG |
2782 NES_QPCONTEXT_MISC_DROS);
3c2d774c
GS		 2783
2784 if (cm_node->tcp_cntxt.snd_wscale || cm_node->tcp_cntxt.rcv_wscale)
2785 nesqp->nesqp_context->misc |= cpu_to_le32(NES_QPCONTEXT_MISC_WSCALE);
2786
2787 nesqp->nesqp_context->misc2 |= cpu_to_le32(64 << NES_QPCONTEXT_MISC2_TTL_SHIFT);
2788
854ace98
FL		 2789 nesqp->nesqp_context->misc2 |= cpu_to_le32(
2790 cm_node->tos << NES_QPCONTEXT_MISC2_TOS_SHIFT);
2791
3c2d774c
GS		 2792 nesqp->nesqp_context->mss |= cpu_to_le32(((u32)cm_node->tcp_cntxt.mss) << 16);
2793
2794 nesqp->nesqp_context->tcp_state_flow_label |= cpu_to_le32(
615eb715 2795 (u32)NES_QPCONTEXT_TCPSTATE_EST << NES_QPCONTEXT_TCPFLOW_TCP_STATE_SHIFT);
3c2d774c
GS		 2796
2797 nesqp->nesqp_context->pd_index_wscale |= cpu_to_le32(
615eb715
TN		 2798 (cm_node->tcp_cntxt.snd_wscale << NES_QPCONTEXT_PDWSCALE_SND_WSCALE_SHIFT) &
2799 NES_QPCONTEXT_PDWSCALE_SND_WSCALE_MASK);
3c2d774c
GS		 2800
2801 nesqp->nesqp_context->pd_index_wscale |= cpu_to_le32(
615eb715
TN		 2802 (cm_node->tcp_cntxt.rcv_wscale << NES_QPCONTEXT_PDWSCALE_RCV_WSCALE_SHIFT) &
2803 NES_QPCONTEXT_PDWSCALE_RCV_WSCALE_MASK);
3c2d774c
GS		 2804
2805 nesqp->nesqp_context->keepalive = cpu_to_le32(0x80);
2806 nesqp->nesqp_context->ts_recent = 0;
2807 nesqp->nesqp_context->ts_age = 0;
2808 nesqp->nesqp_context->snd_nxt = cpu_to_le32(cm_node->tcp_cntxt.loc_seq_num);
2809 nesqp->nesqp_context->snd_wnd = cpu_to_le32(cm_node->tcp_cntxt.snd_wnd);
2810 nesqp->nesqp_context->rcv_nxt = cpu_to_le32(cm_node->tcp_cntxt.rcv_nxt);
2811 nesqp->nesqp_context->rcv_wnd = cpu_to_le32(cm_node->tcp_cntxt.rcv_wnd <<
615eb715 2812 cm_node->tcp_cntxt.rcv_wscale);
3c2d774c
GS		 2813 nesqp->nesqp_context->snd_max = cpu_to_le32(cm_node->tcp_cntxt.loc_seq_num);
2814 nesqp->nesqp_context->snd_una = cpu_to_le32(cm_node->tcp_cntxt.loc_seq_num);
2815 nesqp->nesqp_context->srtt = 0;
2816 nesqp->nesqp_context->rttvar = cpu_to_le32(0x6);
2817 nesqp->nesqp_context->ssthresh = cpu_to_le32(0x3FFFC000);
615eb715 2818 nesqp->nesqp_context->cwnd = cpu_to_le32(2 * cm_node->tcp_cntxt.mss);
3c2d774c
GS		 2819 nesqp->nesqp_context->snd_wl1 = cpu_to_le32(cm_node->tcp_cntxt.rcv_nxt);
2820 nesqp->nesqp_context->snd_wl2 = cpu_to_le32(cm_node->tcp_cntxt.loc_seq_num);
2821 nesqp->nesqp_context->max_snd_wnd = cpu_to_le32(cm_node->tcp_cntxt.max_snd_wnd);
2822
2823 nes_debug(NES_DBG_CM, "QP%u: rcv_nxt = 0x%08X, snd_nxt = 0x%08X,"
615eb715
TN		 2824 " Setting MSS to %u, PDWscale = 0x%08X, rcv_wnd = %u, context misc = 0x%08X.\n",
2825 nesqp->hwqp.qp_id, le32_to_cpu(nesqp->nesqp_context->rcv_nxt),
2826 le32_to_cpu(nesqp->nesqp_context->snd_nxt),
2827 cm_node->tcp_cntxt.mss, le32_to_cpu(nesqp->nesqp_context->pd_index_wscale),
2828 le32_to_cpu(nesqp->nesqp_context->rcv_wnd),
2829 le32_to_cpu(nesqp->nesqp_context->misc));
3c2d774c
GS		 2830 nes_debug(NES_DBG_CM, " snd_wnd = 0x%08X.\n", le32_to_cpu(nesqp->nesqp_context->snd_wnd));
2831 nes_debug(NES_DBG_CM, " snd_cwnd = 0x%08X.\n", le32_to_cpu(nesqp->nesqp_context->cwnd));
2832 nes_debug(NES_DBG_CM, " max_swnd = 0x%08X.\n", le32_to_cpu(nesqp->nesqp_context->max_snd_wnd));
2833
2834 nes_debug(NES_DBG_CM, "Change cm_node state to TSA\n");
2835 cm_node->state = NES_CM_STATE_TSA;
2836
2837 return ret;
2838}
2839
2840
2841/**
2842 * nes_cm_disconn
2843 */
2844int nes_cm_disconn(struct nes_qp *nesqp)
2845{
873fcdd4 2846 struct disconn_work *work;
3c2d774c 2847
873fcdd4
DW		 2848 work = kzalloc(sizeof *work, GFP_ATOMIC);
2849 if (!work)
615eb715 2850 return -ENOMEM; /* Timer will clean up */
3c2d774c 2851
873fcdd4
DW		 2852 nes_add_ref(&nesqp->ibqp);
2853 work->nesqp = nesqp;
2854 INIT_WORK(&work->work, nes_disconnect_worker);
2855 queue_work(g_cm_core->disconn_wq, &work->work);
3c2d774c
GS		 2856 return 0;
2857}
2858
2859
2860/**
2861 * nes_disconnect_worker
2862 */
1a855fbf 2863static void nes_disconnect_worker(struct work_struct *work)
3c2d774c 2864{
873fcdd4
DW		 2865 struct disconn_work *dwork = container_of(work, struct disconn_work, work);
2866 struct nes_qp *nesqp = dwork->nesqp;
3c2d774c 2867
873fcdd4 2868 kfree(dwork);
3c2d774c 2869 nes_debug(NES_DBG_CM, "processing AEQE id 0x%04X for QP%u.\n",
615eb715 2870 nesqp->last_aeq, nesqp->hwqp.qp_id);
3c2d774c 2871 nes_cm_disconn_true(nesqp);
c4c3f279 2872 nes_rem_ref(&nesqp->ibqp);
3c2d774c
GS		 2873}
2874
2875
2876/**
2877 * nes_cm_disconn_true
2878 */
1a855fbf 2879static int nes_cm_disconn_true(struct nes_qp *nesqp)
3c2d774c
GS		 2880{
2881 unsigned long flags;
2882 int ret = 0;
2883 struct iw_cm_id *cm_id;
2884 struct iw_cm_event cm_event;
2885 struct nes_vnic *nesvnic;
2886 u16 last_ae;
2887 u8 original_hw_tcp_state;
2888 u8 original_ibqp_state;
d0c49bf3 2889 int disconn_status = 0;
b29a4fc4
DW		 2890 int issue_disconn = 0;
2891 int issue_close = 0;
2892 int issue_flush = 0;
2893 u32 flush_q = NES_CQP_FLUSH_RQ;
2894 struct ib_event ibevent;
3c2d774c
GS		 2895
2896 if (!nesqp) {
2897 nes_debug(NES_DBG_CM, "disconnect_worker nesqp is NULL\n");
2898 return -1;
2899 }
2900
2901 spin_lock_irqsave(&nesqp->lock, flags);
2902 cm_id = nesqp->cm_id;
2903 /* make sure we havent already closed this connection */
2904 if (!cm_id) {
2905 nes_debug(NES_DBG_CM, "QP%u disconnect_worker cmid is NULL\n",
615eb715 2906 nesqp->hwqp.qp_id);
3c2d774c 2907 spin_unlock_irqrestore(&nesqp->lock, flags);
3c2d774c
GS		 2908 return -1;
2909 }
2910
2911 nesvnic = to_nesvnic(nesqp->ibqp.device);
2912 nes_debug(NES_DBG_CM, "Disconnecting QP%u\n", nesqp->hwqp.qp_id);
2913
2914 original_hw_tcp_state = nesqp->hw_tcp_state;
615eb715 2915 original_ibqp_state = nesqp->ibqp_state;
3c2d774c
GS		 2916 last_ae = nesqp->last_aeq;
2917
b29a4fc4
DW		 2918 if (nesqp->term_flags) {
2919 issue_disconn = 1;
2920 issue_close = 1;
2921 nesqp->cm_id = NULL;
196f40c8 2922 del_timer(&nesqp->terminate_timer);
b29a4fc4
DW		 2923 if (nesqp->flush_issued == 0) {
2924 nesqp->flush_issued = 1;
2925 issue_flush = 1;
2926 }
2927 } else if ((original_hw_tcp_state == NES_AEQE_TCP_STATE_CLOSE_WAIT) ||
2928 ((original_ibqp_state == IB_QPS_RTS) &&
2929 (last_ae == NES_AEQE_AEID_LLP_CONNECTION_RESET))) {
2930 issue_disconn = 1;
2931 if (last_ae == NES_AEQE_AEID_LLP_CONNECTION_RESET)
d0c49bf3 2932 disconn_status = -ECONNRESET;
b29a4fc4
DW		 2933 }
2934
2935 if (((original_hw_tcp_state == NES_AEQE_TCP_STATE_CLOSED) ||
2936 (original_hw_tcp_state == NES_AEQE_TCP_STATE_TIME_WAIT) ||
2937 (last_ae == NES_AEQE_AEID_RDMAP_ROE_BAD_LLP_CLOSE) ||
2938 (last_ae == NES_AEQE_AEID_LLP_CONNECTION_RESET))) {
2939 issue_close = 1;
2940 nesqp->cm_id = NULL;
2941 if (nesqp->flush_issued == 0) {
2942 nesqp->flush_issued = 1;
2943 issue_flush = 1;
2944 }
2945 }
3c2d774c 2946
b29a4fc4
DW		 2947 spin_unlock_irqrestore(&nesqp->lock, flags);
2948
2949 if ((issue_flush) && (nesqp->destroyed == 0)) {
2950 /* Flush the queue(s) */
2951 if (nesqp->hw_iwarp_state >= NES_AEQE_IWARP_STATE_TERMINATE)
2952 flush_q |= NES_CQP_FLUSH_SQ;
2953 flush_wqes(nesvnic->nesdev, nesqp, flush_q, 1);
2954
2955 if (nesqp->term_flags) {
2956 ibevent.device = nesqp->ibqp.device;
2957 ibevent.event = nesqp->terminate_eventtype;
2958 ibevent.element.qp = &nesqp->ibqp;
784d135f
TN		 2959 if (nesqp->ibqp.event_handler)
2960 nesqp->ibqp.event_handler(&ibevent, nesqp->ibqp.qp_context);
b29a4fc4
DW		 2961 }
2962 }
3c2d774c 2963
b29a4fc4
DW		 2964 if ((cm_id) && (cm_id->event_handler)) {
2965 if (issue_disconn) {
3c2d774c
GS		 2966 atomic_inc(&cm_disconnects);
2967 cm_event.event = IW_CM_EVENT_DISCONNECT;
b29a4fc4 2968 cm_event.status = disconn_status;
6a0dde89
FL		 2969 cm_event.local_addr = cm_id->m_local_addr;
2970 cm_event.remote_addr = cm_id->m_remote_addr;
3c2d774c
GS		 2971 cm_event.private_data = NULL;
2972 cm_event.private_data_len = 0;
2973
6492cdf3 2974 nes_debug(NES_DBG_CM, "Generating a CM Disconnect Event"
615eb715
TN		 2975 " for QP%u, SQ Head = %u, SQ Tail = %u. "
2976 "cm_id = %p, refcount = %u.\n",
2977 nesqp->hwqp.qp_id, nesqp->hwqp.sq_head,
2978 nesqp->hwqp.sq_tail, cm_id,
2979 atomic_read(&nesqp->refcount));
3c2d774c 2980
3c2d774c
GS		 2981 ret = cm_id->event_handler(cm_id, &cm_event);
2982 if (ret)
6492cdf3 2983 nes_debug(NES_DBG_CM, "OFA CM event_handler "
615eb715 2984 "returned, ret=%d\n", ret);
3c2d774c
GS		 2985 }
2986
b29a4fc4 2987 if (issue_close) {
3c2d774c 2988 atomic_inc(&cm_closes);
3c2d774c
GS		 2989 nes_disconnect(nesqp, 1);
2990
2991 cm_id->provider_data = nesqp;
2992 /* Send up the close complete event */
2993 cm_event.event = IW_CM_EVENT_CLOSE;
d0c49bf3 2994 cm_event.status = 0;
3c2d774c 2995 cm_event.provider_data = cm_id->provider_data;
6a0dde89
FL		 2996 cm_event.local_addr = cm_id->m_local_addr;
2997 cm_event.remote_addr = cm_id->m_remote_addr;
3c2d774c
GS		 2998 cm_event.private_data = NULL;
2999 cm_event.private_data_len = 0;
3000
3001 ret = cm_id->event_handler(cm_id, &cm_event);
615eb715 3002 if (ret)
3c2d774c 3003 nes_debug(NES_DBG_CM, "OFA CM event_handler returned, ret=%d\n", ret);
3c2d774c
GS		 3004
3005 cm_id->rem_ref(cm_id);
3c2d774c 3006 }
3c2d774c 3007 }
3c2d774c
GS		 3008
3009 return 0;
3010}
3011
3012
3013/**
3014 * nes_disconnect
3015 */
1a855fbf 3016static int nes_disconnect(struct nes_qp *nesqp, int abrupt)
3c2d774c
GS		 3017{
3018 int ret = 0;
3019 struct nes_vnic *nesvnic;
3020 struct nes_device *nesdev;
c12e56ef 3021 struct nes_ib_device *nesibdev;
3c2d774c
GS		 3022
3023 nesvnic = to_nesvnic(nesqp->ibqp.device);
3024 if (!nesvnic)
3025 return -EINVAL;
3026
3027 nesdev = nesvnic->nesdev;
c12e56ef 3028 nesibdev = nesvnic->nesibdev;
3c2d774c
GS		 3029
3030 nes_debug(NES_DBG_CM, "netdev refcnt = %u.\n",
29b4433d 3031 netdev_refcnt_read(nesvnic->netdev));
3c2d774c
GS		 3032
3033 if (nesqp->active_conn) {
3034
3035 /* indicate this connection is NOT active */
3036 nesqp->active_conn = 0;
3037 } else {
3038 /* Need to free the Last Streaming Mode Message */
3039 if (nesqp->ietf_frame) {
c12e56ef
FL		 3040 if (nesqp->lsmm_mr)
3041 nesibdev->ibdev.dereg_mr(nesqp->lsmm_mr);
3c2d774c 3042 pci_free_consistent(nesdev->pcidev,
615eb715
TN		 3043 nesqp->private_data_len + nesqp->ietf_frame_size,
3044 nesqp->ietf_frame, nesqp->ietf_frame_pbase);
3c2d774c
GS		 3045 }
3046 }
3047
3048 /* close the CM node down if it is still active */
3049 if (nesqp->cm_node) {
3050 nes_debug(NES_DBG_CM, "Call close API\n");
3051
3052 g_cm_core->api->close(g_cm_core, nesqp->cm_node);
3c2d774c
GS		 3053 }
3054
3055 return ret;
3056}
3057
3058
3059/**
3060 * nes_accept
3061 */
3062int nes_accept(struct iw_cm_id *cm_id, struct iw_cm_conn_param *conn_param)
3063{
3064 u64 u64temp;
3065 struct ib_qp *ibqp;
3066 struct nes_qp *nesqp;
3067 struct nes_vnic *nesvnic;
3068 struct nes_device *nesdev;
3069 struct nes_cm_node *cm_node;
3070 struct nes_adapter *adapter;
3071 struct ib_qp_attr attr;
3072 struct iw_cm_event cm_event;
3073 struct nes_hw_qp_wqe *wqe;
3074 struct nes_v4_quad nes_quad;
30da7cff 3075 u32 crc_value;
3c2d774c 3076 int ret;
183ecfa3 3077 int passive_state;
c12e56ef
FL		 3078 struct nes_ib_device *nesibdev;
3079 struct ib_mr *ibmr = NULL;
c12e56ef 3080 struct nes_pd *nespd;
7a5efb62 3081 u64 tagged_offset;
615eb715
TN		 3082 u8 mpa_frame_offset = 0;
3083 struct ietf_mpa_v2 *mpa_v2_frame;
3084 u8 start_addr = 0;
3085 u8 *start_ptr = &start_addr;
3086 u8 **start_buff = &start_ptr;
3087 u16 buff_len = 0;
6a0dde89
FL		 3088 struct sockaddr_in *laddr = (struct sockaddr_in *)&cm_id->m_local_addr;
3089 struct sockaddr_in *raddr = (struct sockaddr_in *)&cm_id->m_remote_addr;
c12e56ef 3090
3c2d774c
GS		 3091 ibqp = nes_get_qp(cm_id->device, conn_param->qpn);
3092 if (!ibqp)
3093 return -EINVAL;
3094
3095 /* get all our handles */
3096 nesqp = to_nesqp(ibqp);
3097 nesvnic = to_nesvnic(nesqp->ibqp.device);
3098 nesdev = nesvnic->nesdev;
3099 adapter = nesdev->nesadapter;
3100
3c2d774c 3101 cm_node = (struct nes_cm_node *)cm_id->provider_data;
6492cdf3
FL		 3102 nes_debug(NES_DBG_CM, "nes_accept: cm_node= %p nesvnic=%p, netdev=%p,"
3103 "%s\n", cm_node, nesvnic, nesvnic->netdev,
3104 nesvnic->netdev->name);
3c2d774c 3105
c5a7d489
FL		 3106 if (NES_CM_STATE_LISTENER_DESTROYED == cm_node->state) {
3107 if (cm_node->loopbackpartner)
3108 rem_ref_cm_node(cm_node->cm_core, cm_node->loopbackpartner);
3109 rem_ref_cm_node(cm_node->cm_core, cm_node);
3110 return -EINVAL;
3111 }
3112
dae58728
FL		 3113 passive_state = atomic_add_return(1, &cm_node->passive_state);
3114 if (passive_state == NES_SEND_RESET_EVENT) {
3115 rem_ref_cm_node(cm_node->cm_core, cm_node);
3116 return -ECONNRESET;
3117 }
3c2d774c
GS		 3118 /* associate the node with the QP */
3119 nesqp->cm_node = (void *)cm_node;
6492cdf3 3120 cm_node->nesqp = nesqp;
3c2d774c 3121
4ac79a70 3122
6492cdf3
FL		 3123 nes_debug(NES_DBG_CM, "QP%u, cm_node=%p, jiffies = %lu listener = %p\n",
3124 nesqp->hwqp.qp_id, cm_node, jiffies, cm_node->listener);
3c2d774c
GS		 3125 atomic_inc(&cm_accepts);
3126
3127 nes_debug(NES_DBG_CM, "netdev refcnt = %u.\n",
29b4433d 3128 netdev_refcnt_read(nesvnic->netdev));
3c2d774c 3129
615eb715 3130 nesqp->ietf_frame_size = sizeof(struct ietf_mpa_v2);
6492cdf3
FL		 3131 /* allocate the ietf frame and space for private data */
3132 nesqp->ietf_frame = pci_alloc_consistent(nesdev->pcidev,
615eb715
TN		 3133 nesqp->ietf_frame_size + conn_param->private_data_len,
3134 &nesqp->ietf_frame_pbase);
3c2d774c 3135
6492cdf3 3136 if (!nesqp->ietf_frame) {
615eb715 3137 nes_debug(NES_DBG_CM, "Unable to allocate memory for private data\n");
6492cdf3
FL		 3138 return -ENOMEM;
3139 }
615eb715 3140 mpa_v2_frame = (struct ietf_mpa_v2 *)nesqp->ietf_frame;
3c2d774c 3141
615eb715
TN		 3142 if (cm_node->mpa_frame_rev == IETF_MPA_V1)
3143 mpa_frame_offset = 4;
3c2d774c 3144
4ac79a70
TN		 3145 if (cm_node->mpa_frame_rev == IETF_MPA_V1 ||
3146 cm_node->mpav2_ird_ord == IETF_NO_IRD_ORD) {
3147 record_ird_ord(cm_node, (u16)conn_param->ird, (u16)conn_param->ord);
3148 }
3149
615eb715
TN		 3150 memcpy(mpa_v2_frame->priv_data, conn_param->private_data,
3151 conn_param->private_data_len);
3c2d774c 3152
615eb715
TN		 3153 cm_build_mpa_frame(cm_node, start_buff, &buff_len, nesqp->ietf_frame, MPA_KEY_REPLY);
3154 nesqp->private_data_len = conn_param->private_data_len;
3c2d774c 3155
6492cdf3
FL		 3156 /* setup our first outgoing iWarp send WQE (the IETF frame response) */
3157 wqe = &nesqp->hwqp.sq_vbase[0];
3158
24d44a39 3159 if (raddr->sin_addr.s_addr != laddr->sin_addr.s_addr) {
6492cdf3 3160 u64temp = (unsigned long)nesqp;
c12e56ef
FL		 3161 nesibdev = nesvnic->nesibdev;
3162 nespd = nesqp->nespd;
615eb715 3163 tagged_offset = (u64)(unsigned long)*start_buff;
f64054d8
CH		 3164 ibmr = nes_reg_phys_mr(&nespd->ibpd,
3165 nesqp->ietf_frame_pbase + mpa_frame_offset,
3166 buff_len, IB_ACCESS_LOCAL_WRITE,
3167 &tagged_offset);
bc1251e6 3168 if (IS_ERR(ibmr)) {
c12e56ef 3169 nes_debug(NES_DBG_CM, "Unable to register memory region"
615eb715
TN		 3170 "for lSMM for cm_node = %p \n",
3171 cm_node);
9256b251 3172 pci_free_consistent(nesdev->pcidev,
615eb715
TN		 3173 nesqp->private_data_len + nesqp->ietf_frame_size,
3174 nesqp->ietf_frame, nesqp->ietf_frame_pbase);
bc1251e6 3175 return PTR_ERR(ibmr);
c12e56ef
FL		 3176 }
3177
3178 ibmr->pd = &nespd->ibpd;
3179 ibmr->device = nespd->ibpd.device;
3180 nesqp->lsmm_mr = ibmr;
3181
615eb715 3182 u64temp |= NES_SW_CONTEXT_ALIGN >> 1;
6492cdf3 3183 set_wqe_64bit_value(wqe->wqe_words,
615eb715
TN		 3184 NES_IWARP_SQ_WQE_COMP_CTX_LOW_IDX,
3185 u64temp);
6492cdf3
FL		 3186 wqe->wqe_words[NES_IWARP_SQ_WQE_MISC_IDX] =
3187 cpu_to_le32(NES_IWARP_SQ_WQE_STREAMING |
615eb715 3188 NES_IWARP_SQ_WQE_WRPDU);
6492cdf3 3189 wqe->wqe_words[NES_IWARP_SQ_WQE_TOTAL_PAYLOAD_IDX] =
615eb715 3190 cpu_to_le32(buff_len);
c12e56ef 3191 set_wqe_64bit_value(wqe->wqe_words,
615eb715
TN		 3192 NES_IWARP_SQ_WQE_FRAG0_LOW_IDX,
3193 (u64)(unsigned long)(*start_buff));
6492cdf3 3194 wqe->wqe_words[NES_IWARP_SQ_WQE_LENGTH0_IDX] =
615eb715 3195 cpu_to_le32(buff_len);
c12e56ef 3196 wqe->wqe_words[NES_IWARP_SQ_WQE_STAG0_IDX] = ibmr->lkey;
d2fa9b26
FL		 3197 if (nesqp->sq_kmapped) {
3198 nesqp->sq_kmapped = 0;
3199 kunmap(nesqp->page);
3200 }
6492cdf3
FL		 3201
3202 nesqp->nesqp_context->ird_ord_sizes |=
3203 cpu_to_le32(NES_QPCONTEXT_ORDIRD_LSMM_PRESENT |
615eb715 3204 NES_QPCONTEXT_ORDIRD_WRPDU);
6492cdf3
FL		 3205 } else {
3206 nesqp->nesqp_context->ird_ord_sizes |=
9d5ab133 3207 cpu_to_le32(NES_QPCONTEXT_ORDIRD_WRPDU);
6492cdf3
FL		 3208 }
3209 nesqp->skip_lsmm = 1;
3c2d774c 3210
3c2d774c
GS		 3211 /* Cache the cm_id in the qp */
3212 nesqp->cm_id = cm_id;
3213 cm_node->cm_id = cm_id;
3214
3215 /* nesqp->cm_node = (void *)cm_id->provider_data; */
3216 cm_id->provider_data = nesqp;
615eb715 3217 nesqp->active_conn = 0;
3c2d774c 3218
6492cdf3
FL		 3219 if (cm_node->state == NES_CM_STATE_TSA)
3220 nes_debug(NES_DBG_CM, "Already state = TSA for cm_node=%p\n",
615eb715 3221 cm_node);
6492cdf3 3222
3c2d774c
GS		 3223 nes_cm_init_tsa_conn(nesqp, cm_node);
3224
5647263c 3225 nesqp->nesqp_context->tcpPorts[0] =
6a0dde89 3226 cpu_to_le16(cm_node->loc_port);
5647263c 3227 nesqp->nesqp_context->tcpPorts[1] =
6a0dde89 3228 cpu_to_le16(cm_node->rem_port);
6492cdf3 3229
6a0dde89 3230 nesqp->nesqp_context->ip0 = cpu_to_le32(cm_node->rem_addr);
3c2d774c
GS		 3231
3232 nesqp->nesqp_context->misc2 |= cpu_to_le32(
615eb715
TN		 3233 (u32)PCI_FUNC(nesdev->pcidev->devfn) <<
3234 NES_QPCONTEXT_MISC2_SRC_IP_SHIFT);
3c2d774c 3235
6492cdf3
FL		 3236 nesqp->nesqp_context->arp_index_vlan |=
3237 cpu_to_le32(nes_arp_table(nesdev,
615eb715
TN		 3238 le32_to_cpu(nesqp->nesqp_context->ip0), NULL,
3239 NES_ARP_RESOLVE) << 16);
3c2d774c
GS		 3240
3241 nesqp->nesqp_context->ts_val_delta = cpu_to_le32(
6492cdf3 3242 jiffies - nes_read_indexed(nesdev, NES_IDX_TCP_NOW));
3c2d774c
GS		 3243
3244 nesqp->nesqp_context->ird_index = cpu_to_le32(nesqp->hwqp.qp_id);
3245
3246 nesqp->nesqp_context->ird_ord_sizes |= cpu_to_le32(
6492cdf3
FL		 3247 ((u32)1 << NES_QPCONTEXT_ORDIRD_IWARP_MODE_SHIFT));
3248 nesqp->nesqp_context->ird_ord_sizes |=
4ac79a70 3249 cpu_to_le32((u32)cm_node->ord_size);
3c2d774c
GS		 3250
3251 memset(&nes_quad, 0, sizeof(nes_quad));
6492cdf3
FL		 3252 nes_quad.DstIpAdrIndex =
3253 cpu_to_le32((u32)PCI_FUNC(nesdev->pcidev->devfn) << 24);
6a0dde89
FL		 3254 nes_quad.SrcIpadr = htonl(cm_node->rem_addr);
3255 nes_quad.TcpPorts[0] = htons(cm_node->rem_port);
3256 nes_quad.TcpPorts[1] = htons(cm_node->loc_port);
3c2d774c
GS		 3257
3258 /* Produce hash key */
30da7cff
FL		 3259 crc_value = get_crc_value(&nes_quad);
3260 nesqp->hte_index = cpu_to_be32(crc_value ^ 0xffffffff);
3c2d774c 3261 nes_debug(NES_DBG_CM, "HTE Index = 0x%08X, CRC = 0x%08X\n",
615eb715 3262 nesqp->hte_index, nesqp->hte_index & adapter->hte_index_mask);
3c2d774c
GS		 3263
3264 nesqp->hte_index &= adapter->hte_index_mask;
3265 nesqp->nesqp_context->hte_index = cpu_to_le32(nesqp->hte_index);
3266
3267 cm_node->cm_core->api->accelerated(cm_node->cm_core, cm_node);
3268
6492cdf3 3269 nes_debug(NES_DBG_CM, "QP%u, Destination IP = 0x%08X:0x%04X, local = "
615eb715
TN		 3270 "0x%08X:0x%04X, rcv_nxt=0x%08X, snd_nxt=0x%08X, mpa + "
3271 "private data length=%u.\n", nesqp->hwqp.qp_id,
24d44a39
SW		 3272 ntohl(raddr->sin_addr.s_addr), ntohs(raddr->sin_port),
3273 ntohl(laddr->sin_addr.s_addr), ntohs(laddr->sin_port),
615eb715
TN		 3274 le32_to_cpu(nesqp->nesqp_context->rcv_nxt),
3275 le32_to_cpu(nesqp->nesqp_context->snd_nxt),
3276 buff_len);
3c2d774c 3277
73ac36ea 3278 /* notify OF layer that accept event was successful */
3c2d774c 3279 cm_id->add_ref(cm_id);
9256b251 3280 nes_add_ref(&nesqp->ibqp);
3c2d774c
GS		 3281
3282 cm_event.event = IW_CM_EVENT_ESTABLISHED;
d0c49bf3 3283 cm_event.status = 0;
3c2d774c 3284 cm_event.provider_data = (void *)nesqp;
6a0dde89
FL		 3285 cm_event.local_addr = cm_id->m_local_addr;
3286 cm_event.remote_addr = cm_id->m_remote_addr;
3c2d774c
GS		 3287 cm_event.private_data = NULL;
3288 cm_event.private_data_len = 0;
4ac79a70
TN		 3289 cm_event.ird = cm_node->ird_size;
3290 cm_event.ord = cm_node->ord_size;
3291
3c2d774c 3292 ret = cm_id->event_handler(cm_id, &cm_event);
183ecfa3
FL		 3293 attr.qp_state = IB_QPS_RTS;
3294 nes_modify_qp(&nesqp->ibqp, &attr, IB_QP_STATE, NULL);
3c2d774c 3295 if (cm_node->loopbackpartner) {
6492cdf3
FL		 3296 cm_node->loopbackpartner->mpa_frame_size =
3297 nesqp->private_data_len;
3c2d774c 3298 /* copy entire MPA frame to our cm_node's frame */
6492cdf3 3299 memcpy(cm_node->loopbackpartner->mpa_frame_buf,
615eb715 3300 conn_param->private_data, conn_param->private_data_len);
3c2d774c
GS		 3301 create_event(cm_node->loopbackpartner, NES_CM_EVENT_CONNECTED);
3302 }
3303 if (ret)
6492cdf3 3304 printk(KERN_ERR "%s[%u] OFA CM event_handler returned, "
615eb715 3305 "ret=%d\n", __func__, __LINE__, ret);
3c2d774c
GS		 3306
3307 return 0;
3308}
3309
3310
3311/**
3312 * nes_reject
3313 */
3314int nes_reject(struct iw_cm_id *cm_id, const void *pdata, u8 pdata_len)
3315{
3316 struct nes_cm_node *cm_node;
9d5ab133 3317 struct nes_cm_node *loopback;
3c2d774c 3318 struct nes_cm_core *cm_core;
615eb715 3319 u8 *start_buff;
3c2d774c
GS		 3320
3321 atomic_inc(&cm_rejects);
615eb715 3322 cm_node = (struct nes_cm_node *)cm_id->provider_data;
9d5ab133 3323 loopback = cm_node->loopbackpartner;
3c2d774c 3324 cm_core = cm_node->cm_core;
9d5ab133 3325 cm_node->cm_id = cm_id;
3c2d774c 3326
615eb715 3327 if (pdata_len + sizeof(struct ietf_mpa_v2) > MAX_CM_BUFFER)
9d5ab133
FL		 3328 return -EINVAL;
3329
9d5ab133
FL		 3330 if (loopback) {
3331 memcpy(&loopback->mpa_frame.priv_data, pdata, pdata_len);
3332 loopback->mpa_frame.priv_data_len = pdata_len;
615eb715 3333 loopback->mpa_frame_size = pdata_len;
9d5ab133 3334 } else {
615eb715
TN		 3335 start_buff = &cm_node->mpa_frame_buf[0] + sizeof(struct ietf_mpa_v2);
3336 cm_node->mpa_frame_size = pdata_len;
3337 memcpy(start_buff, pdata, pdata_len);
9d5ab133 3338 }
615eb715 3339 return cm_core->api->reject(cm_core, cm_node);
3c2d774c
GS		 3340}
3341
3342
3343/**
3344 * nes_connect
3345 * setup and launch cm connect node
3346 */
3347int nes_connect(struct iw_cm_id *cm_id, struct iw_cm_conn_param *conn_param)
3348{
3349 struct ib_qp *ibqp;
3350 struct nes_qp *nesqp;
3351 struct nes_vnic *nesvnic;
3352 struct nes_device *nesdev;
3353 struct nes_cm_node *cm_node;
3354 struct nes_cm_info cm_info;
53094c38 3355 int apbvt_set = 0;
6a0dde89
FL		 3356 struct sockaddr_in *laddr = (struct sockaddr_in *)&cm_id->m_local_addr;
3357 struct sockaddr_in *raddr = (struct sockaddr_in *)&cm_id->m_remote_addr;
3c2d774c 3358
24d44a39
SW		 3359 if (cm_id->remote_addr.ss_family != AF_INET)
3360 return -ENOSYS;
3c2d774c
GS		 3361 ibqp = nes_get_qp(cm_id->device, conn_param->qpn);
3362 if (!ibqp)
3363 return -EINVAL;
3364 nesqp = to_nesqp(ibqp);
3365 if (!nesqp)
3366 return -EINVAL;
3367 nesvnic = to_nesvnic(nesqp->ibqp.device);
3368 if (!nesvnic)
3369 return -EINVAL;
615eb715 3370 nesdev = nesvnic->nesdev;
3c2d774c
GS		 3371 if (!nesdev)
3372 return -EINVAL;
3373
24d44a39 3374 if (!laddr->sin_port || !raddr->sin_port)
c5a7d489
FL		 3375 return -EINVAL;
3376
6492cdf3 3377 nes_debug(NES_DBG_CM, "QP%u, current IP = 0x%08X, Destination IP = "
615eb715 3378 "0x%08X:0x%04X, local = 0x%08X:0x%04X.\n", nesqp->hwqp.qp_id,
24d44a39
SW		 3379 ntohl(nesvnic->local_ipaddr), ntohl(raddr->sin_addr.s_addr),
3380 ntohs(raddr->sin_port), ntohl(laddr->sin_addr.s_addr),
3381 ntohs(laddr->sin_port));
3c2d774c 3382
6492cdf3 3383 atomic_inc(&cm_connects);
3c2d774c
GS		 3384 nesqp->active_conn = 1;
3385
3c2d774c
GS		 3386 /* cache the cm_id in the qp */
3387 nesqp->cm_id = cm_id;
3c2d774c 3388 cm_id->provider_data = nesqp;
3c2d774c 3389 nesqp->private_data_len = conn_param->private_data_len;
d3e51328 3390
3c2d774c 3391 nes_debug(NES_DBG_CM, "requested ord = 0x%08X.\n", (u32)conn_param->ord);
6492cdf3 3392 nes_debug(NES_DBG_CM, "mpa private data len =%u\n",
615eb715 3393 conn_param->private_data_len);
3c2d774c 3394
5647263c
TN		 3395 /* set up the connection params for the node */
3396 cm_info.loc_addr = ntohl(laddr->sin_addr.s_addr);
3397 cm_info.loc_port = ntohs(laddr->sin_port);
3398 cm_info.rem_addr = ntohl(raddr->sin_addr.s_addr);
3399 cm_info.rem_port = ntohs(raddr->sin_port);
3400 cm_info.cm_id = cm_id;
3401 cm_info.conn_type = NES_CM_IWARP_CONN_TYPE;
3402
24d44a39 3403 if (laddr->sin_addr.s_addr != raddr->sin_addr.s_addr) {
6a0dde89
FL		 3404 nes_manage_apbvt(nesvnic, cm_info.loc_port,
3405 PCI_FUNC(nesdev->pcidev->devfn),
3406 NES_MANAGE_APBVT_ADD);
53094c38
FL		 3407 apbvt_set = 1;
3408 }
3c2d774c 3409
3c2d774c 3410 cm_id->add_ref(cm_id);
3c2d774c
GS		 3411
3412 /* create a connect CM node connection */
6492cdf3 3413 cm_node = g_cm_core->api->connect(g_cm_core, nesvnic,
615eb715
TN		 3414 conn_param->private_data_len, (void *)conn_param->private_data,
3415 &cm_info);
3c2d774c 3416 if (!cm_node) {
53094c38 3417 if (apbvt_set)
6a0dde89 3418 nes_manage_apbvt(nesvnic, cm_info.loc_port,
615eb715
TN		 3419 PCI_FUNC(nesdev->pcidev->devfn),
3420 NES_MANAGE_APBVT_DEL);
6492cdf3 3421
6a0dde89
FL		 3422 nes_debug(NES_DBG_NLMSG, "Delete loc_port = %04X\n",
3423 cm_info.loc_port);
3c2d774c
GS		 3424 cm_id->rem_ref(cm_id);
3425 return -ENOMEM;
3426 }
3427
4ac79a70
TN		 3428 record_ird_ord(cm_node, (u16)conn_param->ird, (u16)conn_param->ord);
3429 if (cm_node->send_rdma0_op == SEND_RDMA_READ_ZERO &&
3430 cm_node->ord_size == 0)
3431 cm_node->ord_size = 1;
3432
53094c38 3433 cm_node->apbvt_set = apbvt_set;
854ace98 3434 cm_node->tos = cm_id->tos;
3c2d774c 3435 nesqp->cm_node = cm_node;
6492cdf3 3436 cm_node->nesqp = nesqp;
d7ffd507 3437 nes_add_ref(&nesqp->ibqp);
3c2d774c
GS		 3438
3439 return 0;
3440}
3441
3442
3443/**
3444 * nes_create_listen
3445 */
3446int nes_create_listen(struct iw_cm_id *cm_id, int backlog)
3447{
3448 struct nes_vnic *nesvnic;
3449 struct nes_cm_listener *cm_node;
3450 struct nes_cm_info cm_info;
3c2d774c 3451 int err;
6a0dde89 3452 struct sockaddr_in *laddr = (struct sockaddr_in *)&cm_id->m_local_addr;
3c2d774c 3453
3c2d774c 3454 nes_debug(NES_DBG_CM, "cm_id = %p, local port = 0x%04X.\n",
24d44a39 3455 cm_id, ntohs(laddr->sin_port));
3c2d774c 3456
6a0dde89 3457 if (cm_id->m_local_addr.ss_family != AF_INET)
24d44a39 3458 return -ENOSYS;
3c2d774c
GS		 3459 nesvnic = to_nesvnic(cm_id->device);
3460 if (!nesvnic)
3461 return -EINVAL;
69d51023 3462
3c2d774c
GS		 3463 nes_debug(NES_DBG_CM, "nesvnic=%p, netdev=%p, %s\n",
3464 nesvnic, nesvnic->netdev, nesvnic->netdev->name);
3465
3466 nes_debug(NES_DBG_CM, "nesvnic->local_ipaddr=0x%08x, sin_addr.s_addr=0x%08x\n",
24d44a39 3467 nesvnic->local_ipaddr, laddr->sin_addr.s_addr);
3c2d774c
GS		 3468
3469 /* setup listen params in our api call struct */
5647263c
TN		 3470 cm_info.loc_addr = ntohl(nesvnic->local_ipaddr);
3471 cm_info.loc_port = ntohs(laddr->sin_port);
3c2d774c
GS		 3472 cm_info.backlog = backlog;
3473 cm_info.cm_id = cm_id;
3474
3475 cm_info.conn_type = NES_CM_IWARP_CONN_TYPE;
3476
3c2d774c
GS		 3477 cm_node = g_cm_core->api->listen(g_cm_core, nesvnic, &cm_info);
3478 if (!cm_node) {
6492cdf3 3479 printk(KERN_ERR "%s[%u] Error returned from listen API call\n",
615eb715 3480 __func__, __LINE__);
3c2d774c
GS		 3481 return -ENOMEM;
3482 }
3483
3484 cm_id->provider_data = cm_node;
854ace98 3485 cm_node->tos = cm_id->tos;
3c2d774c
GS		 3486
3487 if (!cm_node->reused_node) {
6a0dde89 3488 err = nes_manage_apbvt(nesvnic, cm_node->loc_port,
615eb715
TN		 3489 PCI_FUNC(nesvnic->nesdev->pcidev->devfn),
3490 NES_MANAGE_APBVT_ADD);
3c2d774c 3491 if (err) {
6492cdf3 3492 printk(KERN_ERR "nes_manage_apbvt call returned %d.\n",
615eb715 3493 err);
3c2d774c
GS		 3494 g_cm_core->api->stop_listener(g_cm_core, (void *)cm_node);
3495 return err;
3496 }
6e10d2e4 3497 atomic_inc(&cm_listens_created);
3c2d774c
GS		 3498 }
3499
3500 cm_id->add_ref(cm_id);
3501 cm_id->provider_data = (void *)cm_node;
3502
3503
3504 return 0;
3505}
3506
3507
3508/**
3509 * nes_destroy_listen
3510 */
3511int nes_destroy_listen(struct iw_cm_id *cm_id)
3512{
3513 if (cm_id->provider_data)
3514 g_cm_core->api->stop_listener(g_cm_core, cm_id->provider_data);
3515 else
3516 nes_debug(NES_DBG_CM, "cm_id->provider_data was NULL\n");
3517
3518 cm_id->rem_ref(cm_id);
3519
3520 return 0;
3521}
3522
3523
3524/**
3525 * nes_cm_recv
3526 */
3527int nes_cm_recv(struct sk_buff *skb, struct net_device *netdevice)
3528{
4a14f6a7 3529 int rc = 0;
615eb715 3530
3c2d774c 3531 cm_packets_received++;
615eb715 3532 if ((g_cm_core) && (g_cm_core->api))
4a14f6a7 3533 rc = g_cm_core->api->recv_pkt(g_cm_core, netdev_priv(netdevice), skb);
615eb715 3534 else
3c2d774c 3535 nes_debug(NES_DBG_CM, "Unable to process packet for CM,"
615eb715 3536 " cm is not setup properly.\n");
3c2d774c 3537
4a14f6a7 3538 return rc;
3c2d774c
GS		 3539}
3540
3541
3542/**
3543 * nes_cm_start
3544 * Start and init a cm core module
3545 */
3546int nes_cm_start(void)
3547{
3548 nes_debug(NES_DBG_CM, "\n");
3549 /* create the primary CM core, pass this handle to subsequent core inits */
3550 g_cm_core = nes_cm_alloc_core();
615eb715 3551 if (g_cm_core)
3c2d774c 3552 return 0;
615eb715 3553 else
3c2d774c 3554 return -ENOMEM;
3c2d774c
GS		 3555}
3556
3557
3558/**
3559 * nes_cm_stop
3560 * stop and dealloc all cm core instances
3561 */
3562int nes_cm_stop(void)
3563{
3564 g_cm_core->api->destroy_cm_core(g_cm_core);
3565 return 0;
3566}
3567
3568
3569/**
3570 * cm_event_connected
3571 * handle a connected event, setup QPs and HW
3572 */
1a855fbf 3573static void cm_event_connected(struct nes_cm_event *event)
3c2d774c 3574{
3c2d774c
GS		 3575 struct nes_qp *nesqp;
3576 struct nes_vnic *nesvnic;
3577 struct nes_device *nesdev;
3578 struct nes_cm_node *cm_node;
3579 struct nes_adapter *nesadapter;
3580 struct ib_qp_attr attr;
3581 struct iw_cm_id *cm_id;
3582 struct iw_cm_event cm_event;
3c2d774c 3583 struct nes_v4_quad nes_quad;
30da7cff 3584 u32 crc_value;
3c2d774c 3585 int ret;
24d44a39
SW		 3586 struct sockaddr_in *laddr;
3587 struct sockaddr_in *raddr;
3588 struct sockaddr_in *cm_event_laddr;
3c2d774c
GS		 3589
3590 /* get all our handles */
3591 cm_node = event->cm_node;
3592 cm_id = cm_node->cm_id;
3593 nes_debug(NES_DBG_CM, "cm_event_connected - %p - cm_id = %p\n", cm_node, cm_id);
3594 nesqp = (struct nes_qp *)cm_id->provider_data;
3595 nesvnic = to_nesvnic(nesqp->ibqp.device);
3596 nesdev = nesvnic->nesdev;
3597 nesadapter = nesdev->nesadapter;
6a0dde89
FL		 3598 laddr = (struct sockaddr_in *)&cm_id->m_local_addr;
3599 raddr = (struct sockaddr_in *)&cm_id->m_remote_addr;
24d44a39 3600 cm_event_laddr = (struct sockaddr_in *)&cm_event.local_addr;
3c2d774c 3601
615eb715 3602 if (nesqp->destroyed)
3c2d774c 3603 return;
3c2d774c
GS		 3604 atomic_inc(&cm_connecteds);
3605 nes_debug(NES_DBG_CM, "QP%u attempting to connect to 0x%08X:0x%04X on"
615eb715 3606 " local port 0x%04X. jiffies = %lu.\n",
24d44a39
SW		 3607 nesqp->hwqp.qp_id, ntohl(raddr->sin_addr.s_addr),
3608 ntohs(raddr->sin_port), ntohs(laddr->sin_port), jiffies);
3c2d774c
GS		 3609
3610 nes_cm_init_tsa_conn(nesqp, cm_node);
3611
3612 /* set the QP tsa context */
5647263c 3613 nesqp->nesqp_context->tcpPorts[0] =
6a0dde89 3614 cpu_to_le16(cm_node->loc_port);
5647263c 3615 nesqp->nesqp_context->tcpPorts[1] =
6a0dde89
FL		 3616 cpu_to_le16(cm_node->rem_port);
3617 nesqp->nesqp_context->ip0 = cpu_to_le32(cm_node->rem_addr);
3c2d774c
GS		 3618
3619 nesqp->nesqp_context->misc2 |= cpu_to_le32(
6492cdf3
FL		 3620 (u32)PCI_FUNC(nesdev->pcidev->devfn) <<
3621 NES_QPCONTEXT_MISC2_SRC_IP_SHIFT);
3c2d774c 3622 nesqp->nesqp_context->arp_index_vlan |= cpu_to_le32(
6492cdf3
FL		 3623 nes_arp_table(nesdev,
3624 le32_to_cpu(nesqp->nesqp_context->ip0),
3c2d774c
GS		 3625 NULL, NES_ARP_RESOLVE) << 16);
3626 nesqp->nesqp_context->ts_val_delta = cpu_to_le32(
3627 jiffies - nes_read_indexed(nesdev, NES_IDX_TCP_NOW));
3628 nesqp->nesqp_context->ird_index = cpu_to_le32(nesqp->hwqp.qp_id);
3629 nesqp->nesqp_context->ird_ord_sizes |=
6492cdf3
FL		 3630 cpu_to_le32((u32)1 <<
3631 NES_QPCONTEXT_ORDIRD_IWARP_MODE_SHIFT);
4ac79a70
TN		 3632 nesqp->nesqp_context->ird_ord_sizes |=
3633 cpu_to_le32((u32)cm_node->ord_size);
3c2d774c
GS		 3634
3635 /* Adjust tail for not having a LSMM */
615eb715 3636 /*nesqp->hwqp.sq_tail = 1;*/
3c2d774c 3637
615eb715 3638 build_rdma0_msg(cm_node, &nesqp);
6492cdf3 3639
615eb715
TN		 3640 nes_write32(nesdev->regs + NES_WQE_ALLOC,
3641 (1 << 24) | 0x00800000 | nesqp->hwqp.qp_id);
3c2d774c
GS		 3642
3643 memset(&nes_quad, 0, sizeof(nes_quad));
3644
6492cdf3
FL		 3645 nes_quad.DstIpAdrIndex =
3646 cpu_to_le32((u32)PCI_FUNC(nesdev->pcidev->devfn) << 24);
6a0dde89
FL		 3647 nes_quad.SrcIpadr = htonl(cm_node->rem_addr);
3648 nes_quad.TcpPorts[0] = htons(cm_node->rem_port);
3649 nes_quad.TcpPorts[1] = htons(cm_node->loc_port);
3c2d774c
GS		 3650
3651 /* Produce hash key */
30da7cff
FL		 3652 crc_value = get_crc_value(&nes_quad);
3653 nesqp->hte_index = cpu_to_be32(crc_value ^ 0xffffffff);
3c2d774c 3654 nes_debug(NES_DBG_CM, "HTE Index = 0x%08X, After CRC = 0x%08X\n",
615eb715 3655 nesqp->hte_index, nesqp->hte_index & nesadapter->hte_index_mask);
3c2d774c
GS		 3656
3657 nesqp->hte_index &= nesadapter->hte_index_mask;
3658 nesqp->nesqp_context->hte_index = cpu_to_le32(nesqp->hte_index);
3659
3660 nesqp->ietf_frame = &cm_node->mpa_frame;
615eb715 3661 nesqp->private_data_len = (u8)cm_node->mpa_frame_size;
3c2d774c
GS		 3662 cm_node->cm_core->api->accelerated(cm_node->cm_core, cm_node);
3663
3c2d774c
GS		 3664 /* notify OF layer we successfully created the requested connection */
3665 cm_event.event = IW_CM_EVENT_CONNECT_REPLY;
d0c49bf3 3666 cm_event.status = 0;
3c2d774c 3667 cm_event.provider_data = cm_id->provider_data;
24d44a39
SW		 3668 cm_event_laddr->sin_family = AF_INET;
3669 cm_event_laddr->sin_port = laddr->sin_port;
6a0dde89 3670 cm_event.remote_addr = cm_id->m_remote_addr;
3c2d774c 3671
6492cdf3 3672 cm_event.private_data = (void *)event->cm_node->mpa_frame_buf;
615eb715
TN		 3673 cm_event.private_data_len = (u8)event->cm_node->mpa_frame_size;
3674 cm_event.ird = cm_node->ird_size;
3675 cm_event.ord = cm_node->ord_size;
3c2d774c 3676
6a0dde89 3677 cm_event_laddr->sin_addr.s_addr = htonl(event->cm_info.loc_addr);
3c2d774c
GS		 3678 ret = cm_id->event_handler(cm_id, &cm_event);
3679 nes_debug(NES_DBG_CM, "OFA CM event_handler returned, ret=%d\n", ret);
3680
3681 if (ret)
6492cdf3 3682 printk(KERN_ERR "%s[%u] OFA CM event_handler returned, "
615eb715 3683 "ret=%d\n", __func__, __LINE__, ret);
6492cdf3
FL		 3684 attr.qp_state = IB_QPS_RTS;
3685 nes_modify_qp(&nesqp->ibqp, &attr, IB_QP_STATE, NULL);
3c2d774c 3686
6492cdf3 3687 nes_debug(NES_DBG_CM, "Exiting connect thread for QP%u. jiffies = "
615eb715 3688 "%lu\n", nesqp->hwqp.qp_id, jiffies);
3c2d774c
GS		 3689
3690 return;
3691}
3692
3693
3694/**
3695 * cm_event_connect_error
3696 */
1a855fbf 3697static void cm_event_connect_error(struct nes_cm_event *event)
3c2d774c
GS		 3698{
3699 struct nes_qp *nesqp;
3700 struct iw_cm_id *cm_id;
3701 struct iw_cm_event cm_event;
3702 /* struct nes_cm_info cm_info; */
3703 int ret;
3704
3705 if (!event->cm_node)
3706 return;
3707
3708 cm_id = event->cm_node->cm_id;
615eb715 3709 if (!cm_id)
3c2d774c 3710 return;
3c2d774c
GS		 3711
3712 nes_debug(NES_DBG_CM, "cm_node=%p, cm_id=%p\n", event->cm_node, cm_id);
3713 nesqp = cm_id->provider_data;
3714
615eb715 3715 if (!nesqp)
3c2d774c 3716 return;
3c2d774c
GS		 3717
3718 /* notify OF layer about this connection error event */
3719 /* cm_id->rem_ref(cm_id); */
3720 nesqp->cm_id = NULL;
3721 cm_id->provider_data = NULL;
3722 cm_event.event = IW_CM_EVENT_CONNECT_REPLY;
c5a7d489 3723 cm_event.status = -ECONNRESET;
3c2d774c 3724 cm_event.provider_data = cm_id->provider_data;
6a0dde89
FL		 3725 cm_event.local_addr = cm_id->m_local_addr;
3726 cm_event.remote_addr = cm_id->m_remote_addr;
3c2d774c
GS		 3727 cm_event.private_data = NULL;
3728 cm_event.private_data_len = 0;
3729
24d44a39
SW		 3730#ifdef CONFIG_INFINIBAND_NES_DEBUG
3731 {
3732 struct sockaddr_in *cm_event_laddr = (struct sockaddr_in *)
3733 &cm_event.local_addr;
3734 struct sockaddr_in *cm_event_raddr = (struct sockaddr_in *)
3735 &cm_event.remote_addr;
3736 nes_debug(NES_DBG_CM, "call CM_EVENT REJECTED, local_addr=%08x, remote_addr=%08x\n",
3737 cm_event_laddr->sin_addr.s_addr, cm_event_raddr->sin_addr.s_addr);
3738 }
3739#endif
3c2d774c
GS		 3740
3741 ret = cm_id->event_handler(cm_id, &cm_event);
3742 nes_debug(NES_DBG_CM, "OFA CM event_handler returned, ret=%d\n", ret);
3743 if (ret)
6492cdf3 3744 printk(KERN_ERR "%s[%u] OFA CM event_handler returned, "
615eb715 3745 "ret=%d\n", __func__, __LINE__, ret);
6492cdf3 3746 cm_id->rem_ref(cm_id);
3c2d774c 3747
6492cdf3 3748 rem_ref_cm_node(event->cm_node->cm_core, event->cm_node);
3c2d774c
GS		 3749 return;
3750}
3751
3752
3753/**
3754 * cm_event_reset
3755 */
1a855fbf 3756static void cm_event_reset(struct nes_cm_event *event)
3c2d774c
GS		 3757{
3758 struct nes_qp *nesqp;
3759 struct iw_cm_id *cm_id;
3760 struct iw_cm_event cm_event;
3761 /* struct nes_cm_info cm_info; */
3762 int ret;
3763
3764 if (!event->cm_node)
3765 return;
3766
3767 if (!event->cm_node->cm_id)
3768 return;
3769
3770 cm_id = event->cm_node->cm_id;
3771
3772 nes_debug(NES_DBG_CM, "%p - cm_id = %p\n", event->cm_node, cm_id);
3773 nesqp = cm_id->provider_data;
f9f3f1e0
FL		 3774 if (!nesqp)
3775 return;
3c2d774c
GS		 3776
3777 nesqp->cm_id = NULL;
3778 /* cm_id->provider_data = NULL; */
3779 cm_event.event = IW_CM_EVENT_DISCONNECT;
d0c49bf3 3780 cm_event.status = -ECONNRESET;
3c2d774c 3781 cm_event.provider_data = cm_id->provider_data;
6a0dde89
FL		 3782 cm_event.local_addr = cm_id->m_local_addr;
3783 cm_event.remote_addr = cm_id->m_remote_addr;
3c2d774c
GS		 3784 cm_event.private_data = NULL;
3785 cm_event.private_data_len = 0;
3786
183ecfa3 3787 cm_id->add_ref(cm_id);
f9f3f1e0 3788 ret = cm_id->event_handler(cm_id, &cm_event);
183ecfa3
FL		 3789 atomic_inc(&cm_closes);
3790 cm_event.event = IW_CM_EVENT_CLOSE;
d0c49bf3 3791 cm_event.status = 0;
183ecfa3 3792 cm_event.provider_data = cm_id->provider_data;
6a0dde89
FL		 3793 cm_event.local_addr = cm_id->m_local_addr;
3794 cm_event.remote_addr = cm_id->m_remote_addr;
183ecfa3
FL		 3795 cm_event.private_data = NULL;
3796 cm_event.private_data_len = 0;
3797 nes_debug(NES_DBG_CM, "NODE %p Generating CLOSE\n", event->cm_node);
3798 ret = cm_id->event_handler(cm_id, &cm_event);
3799
3c2d774c
GS		 3800 nes_debug(NES_DBG_CM, "OFA CM event_handler returned, ret=%d\n", ret);
3801
3802
3803 /* notify OF layer about this connection error event */
3804 cm_id->rem_ref(cm_id);
3805
3806 return;
3807}
3808
3809
3810/**
3811 * cm_event_mpa_req
3812 */
1a855fbf 3813static void cm_event_mpa_req(struct nes_cm_event *event)
3c2d774c 3814{
615eb715 3815 struct iw_cm_id *cm_id;
3c2d774c
GS		 3816 struct iw_cm_event cm_event;
3817 int ret;
3818 struct nes_cm_node *cm_node;
24d44a39
SW		 3819 struct sockaddr_in *cm_event_laddr = (struct sockaddr_in *)
3820 &cm_event.local_addr;
3821 struct sockaddr_in *cm_event_raddr = (struct sockaddr_in *)
3822 &cm_event.remote_addr;
3c2d774c
GS		 3823
3824 cm_node = event->cm_node;
3825 if (!cm_node)
3826 return;
3827 cm_id = cm_node->cm_id;
3828
3829 atomic_inc(&cm_connect_reqs);
3830 nes_debug(NES_DBG_CM, "cm_node = %p - cm_id = %p, jiffies = %lu\n",
615eb715 3831 cm_node, cm_id, jiffies);
3c2d774c
GS		 3832
3833 cm_event.event = IW_CM_EVENT_CONNECT_REQUEST;
d0c49bf3 3834 cm_event.status = 0;
3c2d774c
GS		 3835 cm_event.provider_data = (void *)cm_node;
3836
24d44a39
SW		 3837 cm_event_laddr->sin_family = AF_INET;
3838 cm_event_laddr->sin_port = htons(event->cm_info.loc_port);
3839 cm_event_laddr->sin_addr.s_addr = htonl(event->cm_info.loc_addr);
3c2d774c 3840
24d44a39
SW		 3841 cm_event_raddr->sin_family = AF_INET;
3842 cm_event_raddr->sin_port = htons(event->cm_info.rem_port);
3843 cm_event_raddr->sin_addr.s_addr = htonl(event->cm_info.rem_addr);
9d5ab133 3844 cm_event.private_data = cm_node->mpa_frame_buf;
615eb715 3845 cm_event.private_data_len = (u8)cm_node->mpa_frame_size;
4ac79a70
TN		 3846 if (cm_node->mpa_frame_rev == IETF_MPA_V1) {
3847 cm_event.ird = NES_MAX_IRD;
3848 cm_event.ord = NES_MAX_ORD;
3849 } else {
615eb715
TN		 3850 cm_event.ird = cm_node->ird_size;
3851 cm_event.ord = cm_node->ord_size;
4ac79a70 3852 }
9d5ab133
FL		 3853
3854 ret = cm_id->event_handler(cm_id, &cm_event);
3855 if (ret)
3856 printk(KERN_ERR "%s[%u] OFA CM event_handler returned, ret=%d\n",
615eb715 3857 __func__, __LINE__, ret);
9d5ab133
FL		 3858 return;
3859}
3860
3861
3862static void cm_event_mpa_reject(struct nes_cm_event *event)
3863{
615eb715 3864 struct iw_cm_id *cm_id;
9d5ab133
FL		 3865 struct iw_cm_event cm_event;
3866 struct nes_cm_node *cm_node;
3867 int ret;
24d44a39
SW		 3868 struct sockaddr_in *cm_event_laddr = (struct sockaddr_in *)
3869 &cm_event.local_addr;
3870 struct sockaddr_in *cm_event_raddr = (struct sockaddr_in *)
3871 &cm_event.remote_addr;
9d5ab133
FL		 3872
3873 cm_node = event->cm_node;
3874 if (!cm_node)
3875 return;
3876 cm_id = cm_node->cm_id;
3877
3878 atomic_inc(&cm_connect_reqs);
3879 nes_debug(NES_DBG_CM, "cm_node = %p - cm_id = %p, jiffies = %lu\n",
615eb715 3880 cm_node, cm_id, jiffies);
9d5ab133
FL		 3881
3882 cm_event.event = IW_CM_EVENT_CONNECT_REPLY;
3883 cm_event.status = -ECONNREFUSED;
3884 cm_event.provider_data = cm_id->provider_data;
3885
24d44a39
SW		 3886 cm_event_laddr->sin_family = AF_INET;
3887 cm_event_laddr->sin_port = htons(event->cm_info.loc_port);
3888 cm_event_laddr->sin_addr.s_addr = htonl(event->cm_info.loc_addr);
9d5ab133 3889
24d44a39
SW		 3890 cm_event_raddr->sin_family = AF_INET;
3891 cm_event_raddr->sin_port = htons(event->cm_info.rem_port);
3892 cm_event_raddr->sin_addr.s_addr = htonl(event->cm_info.rem_addr);
3c2d774c 3893
9d5ab133 3894 cm_event.private_data = cm_node->mpa_frame_buf;
615eb715 3895 cm_event.private_data_len = (u8)cm_node->mpa_frame_size;
9d5ab133
FL		 3896
3897 nes_debug(NES_DBG_CM, "call CM_EVENT_MPA_REJECTED, local_addr=%08x, "
615eb715 3898 "remove_addr=%08x\n",
24d44a39
SW		 3899 cm_event_laddr->sin_addr.s_addr,
3900 cm_event_raddr->sin_addr.s_addr);
3c2d774c
GS		 3901
3902 ret = cm_id->event_handler(cm_id, &cm_event);
3903 if (ret)
9d5ab133 3904 printk(KERN_ERR "%s[%u] OFA CM event_handler returned, ret=%d\n",
615eb715 3905 __func__, __LINE__, ret);
3c2d774c
GS		 3906
3907 return;
3908}
3909
3910
3911static void nes_cm_event_handler(struct work_struct *);
3912
3913/**
3914 * nes_cm_post_event
3915 * post an event to the cm event handler
3916 */
1a855fbf 3917static int nes_cm_post_event(struct nes_cm_event *event)
3c2d774c
GS		 3918{
3919 atomic_inc(&event->cm_node->cm_core->events_posted);
3920 add_ref_cm_node(event->cm_node);
3921 event->cm_info.cm_id->add_ref(event->cm_info.cm_id);
3922 INIT_WORK(&event->event_work, nes_cm_event_handler);
6492cdf3 3923 nes_debug(NES_DBG_CM, "cm_node=%p queue_work, event=%p\n",
615eb715 3924 event->cm_node, event);
3c2d774c
GS		 3925
3926 queue_work(event->cm_node->cm_core->event_wq, &event->event_work);
3927
3928 nes_debug(NES_DBG_CM, "Exit\n");
3929 return 0;
3930}
3931
3932
3933/**
3934 * nes_cm_event_handler
3935 * worker function to handle cm events
3936 * will free instance of nes_cm_event
3937 */
3938static void nes_cm_event_handler(struct work_struct *work)
3939{
6492cdf3 3940 struct nes_cm_event *event = container_of(work, struct nes_cm_event,
615eb715 3941 event_work);
3c2d774c
GS		 3942 struct nes_cm_core *cm_core;
3943
6492cdf3 3944 if ((!event) || (!event->cm_node) || (!event->cm_node->cm_core))
3c2d774c 3945 return;
6492cdf3 3946
3c2d774c
GS		 3947 cm_core = event->cm_node->cm_core;
3948 nes_debug(NES_DBG_CM, "event=%p, event->type=%u, events posted=%u\n",
615eb715 3949 event, event->type, atomic_read(&cm_core->events_posted));
3c2d774c
GS		 3950
3951 switch (event->type) {
6492cdf3
FL		 3952 case NES_CM_EVENT_MPA_REQ:
3953 cm_event_mpa_req(event);
3954 nes_debug(NES_DBG_CM, "cm_node=%p CM Event: MPA REQUEST\n",
615eb715 3955 event->cm_node);
6492cdf3
FL		 3956 break;
3957 case NES_CM_EVENT_RESET:
3958 nes_debug(NES_DBG_CM, "cm_node = %p CM Event: RESET\n",
615eb715 3959 event->cm_node);
6492cdf3
FL		 3960 cm_event_reset(event);
3961 break;
3962 case NES_CM_EVENT_CONNECTED:
3963 if ((!event->cm_node->cm_id) ||
615eb715 3964 (event->cm_node->state != NES_CM_STATE_TSA))
3c2d774c 3965 break;
6492cdf3
FL		 3966 cm_event_connected(event);
3967 nes_debug(NES_DBG_CM, "CM Event: CONNECTED\n");
3968 break;
9d5ab133
FL		 3969 case NES_CM_EVENT_MPA_REJECT:
3970 if ((!event->cm_node->cm_id) ||
615eb715 3971 (event->cm_node->state == NES_CM_STATE_TSA))
9d5ab133
FL		 3972 break;
3973 cm_event_mpa_reject(event);
3974 nes_debug(NES_DBG_CM, "CM Event: REJECT\n");
3975 break;
3976
6492cdf3
FL		 3977 case NES_CM_EVENT_ABORTED:
3978 if ((!event->cm_node->cm_id) ||
615eb715 3979 (event->cm_node->state == NES_CM_STATE_TSA))
3c2d774c 3980 break;
6492cdf3
FL		 3981 cm_event_connect_error(event);
3982 nes_debug(NES_DBG_CM, "CM Event: ABORTED\n");
3983 break;
3984 case NES_CM_EVENT_DROPPED_PKT:
3985 nes_debug(NES_DBG_CM, "CM Event: DROPPED PKT\n");
3986 break;
3987 default:
3988 nes_debug(NES_DBG_CM, "CM Event: UNKNOWN EVENT TYPE\n");
3989 break;
3c2d774c
GS		 3990 }
3991
3992 atomic_dec(&cm_core->events_posted);
3993 event->cm_info.cm_id->rem_ref(event->cm_info.cm_id);
3994 rem_ref_cm_node(cm_core, event->cm_node);
3995 kfree(event);
3996
3997 return;
3998}
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