1 /*
2 * Copyright (c) 2006 - 2014 Intel Corporation. All rights reserved.
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
37 #include <linux/atomic.h>
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>
43 #include <linux/if_vlan.h>
44 #include <linux/notifier.h>
45 #include <linux/net.h>
46 #include <linux/types.h>
47 #include <linux/timer.h>
48 #include <linux/time.h>
49 #include <linux/delay.h>
50 #include <linux/etherdevice.h>
51 #include <linux/netdevice.h>
52 #include <linux/random.h>
53 #include <linux/list.h>
54 #include <linux/threads.h>
55 #include <linux/highmem.h>
56 #include <linux/slab.h>
57 #include <net/arp.h>
58 #include <net/neighbour.h>
59 #include <net/route.h>
60 #include <net/ip_fib.h>
61 #include <net/tcp.h>
62 #include <linux/fcntl.h>
63
64 #include "nes.h"
65
66 u32 cm_packets_sent;
67 u32 cm_packets_bounced;
68 u32 cm_packets_dropped;
69 u32 cm_packets_retrans;
70 u32 cm_packets_created;
71 u32 cm_packets_received;
72 atomic_t cm_listens_created;
73 atomic_t cm_listens_destroyed;
74 u32 cm_backlog_drops;
75 atomic_t cm_loopbacks;
76 atomic_t cm_nodes_created;
77 atomic_t cm_nodes_destroyed;
78 atomic_t cm_accel_dropped_pkts;
79 atomic_t cm_resets_recvd;
80
81 static inline int mini_cm_accelerated(struct nes_cm_core *, struct nes_cm_node *);
82 static struct nes_cm_listener *mini_cm_listen(struct nes_cm_core *, struct nes_vnic *, struct nes_cm_info *);
83 static int mini_cm_del_listen(struct nes_cm_core *, struct nes_cm_listener *);
84 static struct nes_cm_node *mini_cm_connect(struct nes_cm_core *, struct nes_vnic *, u16, void *, struct nes_cm_info *);
85 static int mini_cm_close(struct nes_cm_core *, struct nes_cm_node *);
86 static int mini_cm_accept(struct nes_cm_core *, struct nes_cm_node *);
87 static int mini_cm_reject(struct nes_cm_core *, struct nes_cm_node *);
88 static int mini_cm_recv_pkt(struct nes_cm_core *, struct nes_vnic *, struct sk_buff *);
89 static int mini_cm_dealloc_core(struct nes_cm_core *);
90 static int mini_cm_get(struct nes_cm_core *);
91 static int mini_cm_set(struct nes_cm_core *, u32, u32);
92
93 static void form_cm_frame(struct sk_buff *, struct nes_cm_node *, void *, u32, void *, u32, u8);
94 static int add_ref_cm_node(struct nes_cm_node *);
95 static int rem_ref_cm_node(struct nes_cm_core *, struct nes_cm_node *);
96
97 static int nes_cm_disconn_true(struct nes_qp *);
98 static int nes_cm_post_event(struct nes_cm_event *event);
99 static int nes_disconnect(struct nes_qp *nesqp, int abrupt);
100 static void nes_disconnect_worker(struct work_struct *work);
101
102 static int send_mpa_request(struct nes_cm_node *, struct sk_buff *);
103 static int send_mpa_reject(struct nes_cm_node *);
104 static int send_syn(struct nes_cm_node *, u32, struct sk_buff *);
105 static int send_reset(struct nes_cm_node *, struct sk_buff *);
106 static int send_ack(struct nes_cm_node *cm_node, struct sk_buff *skb);
107 static int send_fin(struct nes_cm_node *cm_node, struct sk_buff *skb);
108 static void process_packet(struct nes_cm_node *, struct sk_buff *, struct nes_cm_core *);
109
110 static void active_open_err(struct nes_cm_node *, struct sk_buff *, int);
111 static void passive_open_err(struct nes_cm_node *, struct sk_buff *, int);
112 static void cleanup_retrans_entry(struct nes_cm_node *);
113 static void handle_rcv_mpa(struct nes_cm_node *, struct sk_buff *);
114 static void free_retrans_entry(struct nes_cm_node *cm_node);
115 static int handle_tcp_options(struct nes_cm_node *cm_node, struct tcphdr *tcph, struct sk_buff *skb, int optionsize, int passive);
116
117 /* CM event handler functions */
118 static void cm_event_connected(struct nes_cm_event *);
119 static void cm_event_connect_error(struct nes_cm_event *);
120 static void cm_event_reset(struct nes_cm_event *);
121 static void cm_event_mpa_req(struct nes_cm_event *);
122 static void cm_event_mpa_reject(struct nes_cm_event *);
123 static void handle_recv_entry(struct nes_cm_node *cm_node, u32 rem_node);
124
125 /* MPA build functions */
126 static int cm_build_mpa_frame(struct nes_cm_node *, u8 **, u16 *, u8 *, u8);
127 static void build_mpa_v2(struct nes_cm_node *, void *, u8);
128 static void build_mpa_v1(struct nes_cm_node *, void *, u8);
129 static void build_rdma0_msg(struct nes_cm_node *, struct nes_qp **);
130
131 static void print_core(struct nes_cm_core *core);
132 static void record_ird_ord(struct nes_cm_node *, u16, u16);
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 */
137 static struct nes_cm_ops nes_cm_api = {
138 mini_cm_accelerated,
139 mini_cm_listen,
140 mini_cm_del_listen,
141 mini_cm_connect,
142 mini_cm_close,
143 mini_cm_accept,
144 mini_cm_reject,
145 mini_cm_recv_pkt,
146 mini_cm_dealloc_core,
147 mini_cm_get,
148 mini_cm_set
149 };
150
151 static struct nes_cm_core *g_cm_core;
152
153 atomic_t cm_connects;
154 atomic_t cm_accepts;
155 atomic_t cm_disconnects;
156 atomic_t cm_closes;
157 atomic_t cm_connecteds;
158 atomic_t cm_connect_reqs;
159 atomic_t cm_rejects;
160
nes_add_ref_cm_node(struct nes_cm_node * cm_node)161 int nes_add_ref_cm_node(struct nes_cm_node *cm_node)
162 {
163 return add_ref_cm_node(cm_node);
164 }
165
nes_rem_ref_cm_node(struct nes_cm_node * cm_node)166 int 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 }
170 /**
171 * create_event
172 */
create_event(struct nes_cm_node * cm_node,enum nes_cm_event_type type)173 static struct nes_cm_event *create_event(struct nes_cm_node * cm_node,
174 enum nes_cm_event_type type)
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
195 nes_debug(NES_DBG_CM, "cm_node=%p Created event=%p, type=%u, "
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);
200
201 nes_cm_post_event(event);
202 return event;
203 }
204
205
206 /**
207 * send_mpa_request
208 */
send_mpa_request(struct nes_cm_node * cm_node,struct sk_buff * skb)209 static int send_mpa_request(struct nes_cm_node *cm_node, struct sk_buff *skb)
210 {
211 u8 start_addr = 0;
212 u8 *start_ptr = &start_addr;
213 u8 **start_buff = &start_ptr;
214 u16 buff_len = 0;
215
216 if (!skb) {
217 nes_debug(NES_DBG_CM, "skb set to NULL\n");
218 return -1;
219 }
220
221 /* send an MPA Request frame */
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);
224
225 return schedule_nes_timer(cm_node, skb, NES_TIMER_TYPE_SEND, 1, 0);
226 }
227
228
229
send_mpa_reject(struct nes_cm_node * cm_node)230 static int send_mpa_reject(struct nes_cm_node *cm_node)
231 {
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;
237 struct ietf_mpa_v1 *mpa_frame;
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 */
246 cm_build_mpa_frame(cm_node, start_buff, &buff_len, NULL, MPA_KEY_REPLY);
247 mpa_frame = (struct ietf_mpa_v1 *)*start_buff;
248 mpa_frame->flags |= IETF_MPA_FLAGS_REJECT;
249 form_cm_frame(skb, cm_node, NULL, 0, *start_buff, buff_len, SET_ACK | SET_FIN);
250
251 cm_node->state = NES_CM_STATE_FIN_WAIT1;
252 return schedule_nes_timer(cm_node, skb, NES_TIMER_TYPE_SEND, 1, 0);
253 }
254
255
256 /**
257 * recv_mpa - process a received TCP pkt, we are expecting an
258 * IETF MPA frame
259 */
parse_mpa(struct nes_cm_node * cm_node,u8 * buffer,u32 * type,u32 len)260 static int parse_mpa(struct nes_cm_node *cm_node, u8 *buffer, u32 *type,
261 u32 len)
262 {
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;
268
269 *type = NES_MPA_REQUEST_ACCEPT;
270
271 /* assume req frame is in tcp data payload */
272 if (len < sizeof(struct ietf_mpa_v1)) {
273 nes_debug(NES_DBG_CM, "The received ietf buffer was too small (%x)\n", len);
274 return -EINVAL;
275 }
276
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
282 /* make sure mpa private data len is less than 512 bytes */
283 if (priv_data_len > IETF_MAX_PRIV_DATA_LEN) {
284 nes_debug(NES_DBG_CM, "The received Length of Private"
285 " Data field exceeds 512 octets\n");
286 return -EINVAL;
287 }
288 /*
289 * make sure MPA receiver interoperate with the
290 * received MPA version and MPA key information
291 *
292 */
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) {
302 nes_debug(NES_DBG_CM, "The received mpa version"
303 " can not be interoperated\n");
304 return -EINVAL;
305 } else {
306 cm_node->mpa_frame_rev = mpa_frame->rev;
307 }
308
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 }
320
321 if (priv_data_len + mpa_hdr_len != len) {
322 nes_debug(NES_DBG_CM, "The received ietf buffer was not right"
323 " complete (%x + %x != %x)\n",
324 priv_data_len, mpa_hdr_len, len);
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"
330 " (%x + %x != %x)\n",
331 priv_data_len, mpa_hdr_len, len);
332 return -EINVAL;
333 }
334
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;
341 u16 rtr_ctrl_ird;
342 u16 rtr_ctrl_ord;
343
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 */
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;
354
355 if (!(rtr_ctrl_ird & IETF_PEER_TO_PEER)) {
356 /* send reset */
357 return -EINVAL;
358 }
359 if (ird_size == IETF_NO_IRD_ORD || ord_size == IETF_NO_IRD_ORD)
360 cm_node->mpav2_ird_ord = IETF_NO_IRD_ORD;
361
362 if (cm_node->mpav2_ird_ord != IETF_NO_IRD_ORD) {
363 /* responder */
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 }
404 }
405 }
406
407 if (rtr_ctrl_ord & IETF_RDMA0_READ) {
408 cm_node->send_rdma0_op = SEND_RDMA_READ_ZERO;
409
410 } else if (rtr_ctrl_ord & IETF_RDMA0_WRITE) {
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
422 /* copy entire MPA frame to our cm_node's frame */
423 memcpy(cm_node->mpa_frame_buf, buffer + mpa_hdr_len, cm_node->mpa_frame_size);
424
425 if (mpa_frame->flags & IETF_MPA_FLAGS_REJECT)
426 *type = NES_MPA_REQUEST_REJECT;
427 return 0;
428 }
429
430
431 /**
432 * form_cm_frame - get a free packet and build empty frame Use
433 * node info to build.
434 */
form_cm_frame(struct sk_buff * skb,struct nes_cm_node * cm_node,void * options,u32 optionsize,void * data,u32 datasize,u8 flags)435 static void form_cm_frame(struct sk_buff *skb,
436 struct nes_cm_node *cm_node, void *options, u32 optionsize,
437 void *data, u32 datasize, u8 flags)
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);
446 packetsize += optionsize + datasize;
447
448 skb_trim(skb, 0);
449 memset(skb->data, 0x00, ETH_HLEN + sizeof(*iph) + sizeof(*tcph));
450
451 buf = skb_put(skb, packetsize + ETH_HLEN);
452
453 ethh = (struct ethhdr *)buf;
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);
461 skb_set_transport_header(skb, ETH_HLEN + sizeof(*iph));
462 buf += sizeof(*tcph);
463
464 skb->ip_summed = CHECKSUM_PARTIAL;
465 if (!(cm_node->netdev->features & NETIF_F_IP_CSUM))
466 skb->ip_summed = CHECKSUM_NONE;
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;
476 iph->ihl = 5; /* 5 * 4Byte words, IP headr len */
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;
483 iph->protocol = 0x06; /* IPPROTO_TCP */
484
485 iph->saddr = htonl(cm_node->mapped_loc_addr);
486 iph->daddr = htonl(cm_node->mapped_rem_addr);
487
488 tcph->source = htons(cm_node->mapped_loc_port);
489 tcph->dest = htons(cm_node->mapped_rem_port);
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;
496 } else {
497 tcph->ack_seq = 0;
498 }
499
500 if (flags & SET_SYN) {
501 cm_node->tcp_cntxt.loc_seq_num++;
502 tcph->syn = 1;
503 } else {
504 cm_node->tcp_cntxt.loc_seq_num += datasize;
505 }
506
507 if (flags & SET_FIN) {
508 cm_node->tcp_cntxt.loc_seq_num++;
509 tcph->fin = 1;
510 }
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++;
526 }
527
528 /*
529 * nes_create_sockaddr - Record ip addr and tcp port in a sockaddr struct
530 */
nes_create_sockaddr(__be32 ip_addr,__be16 port,struct sockaddr_storage * addr)531 static void nes_create_sockaddr(__be32 ip_addr, __be16 port,
532 struct sockaddr_storage *addr)
533 {
534 struct sockaddr_in *nes_sockaddr = (struct sockaddr_in *)addr;
535 nes_sockaddr->sin_family = AF_INET;
536 memcpy(&nes_sockaddr->sin_addr.s_addr, &ip_addr, sizeof(__be32));
537 nes_sockaddr->sin_port = port;
538 }
539
540 /*
541 * nes_create_mapinfo - Create a mapinfo object in the port mapper data base
542 */
nes_create_mapinfo(struct nes_cm_info * cm_info)543 static int nes_create_mapinfo(struct nes_cm_info *cm_info)
544 {
545 struct sockaddr_storage local_sockaddr;
546 struct sockaddr_storage mapped_sockaddr;
547
548 nes_create_sockaddr(htonl(cm_info->loc_addr), htons(cm_info->loc_port),
549 &local_sockaddr);
550 nes_create_sockaddr(htonl(cm_info->mapped_loc_addr),
551 htons(cm_info->mapped_loc_port), &mapped_sockaddr);
552
553 return iwpm_create_mapinfo(&local_sockaddr,
554 &mapped_sockaddr, RDMA_NL_NES);
555 }
556
557 /*
558 * nes_remove_mapinfo - Remove a mapinfo object from the port mapper data base
559 * and send a remove mapping op message to
560 * the userspace port mapper
561 */
nes_remove_mapinfo(u32 loc_addr,u16 loc_port,u32 mapped_loc_addr,u16 mapped_loc_port)562 static int nes_remove_mapinfo(u32 loc_addr, u16 loc_port,
563 u32 mapped_loc_addr, u16 mapped_loc_port)
564 {
565 struct sockaddr_storage local_sockaddr;
566 struct sockaddr_storage mapped_sockaddr;
567
568 nes_create_sockaddr(htonl(loc_addr), htons(loc_port), &local_sockaddr);
569 nes_create_sockaddr(htonl(mapped_loc_addr), htons(mapped_loc_port),
570 &mapped_sockaddr);
571
572 iwpm_remove_mapinfo(&local_sockaddr, &mapped_sockaddr);
573 return iwpm_remove_mapping(&local_sockaddr, RDMA_NL_NES);
574 }
575
576 /*
577 * nes_form_pm_msg - Form a port mapper message with mapping info
578 */
nes_form_pm_msg(struct nes_cm_info * cm_info,struct iwpm_sa_data * pm_msg)579 static void nes_form_pm_msg(struct nes_cm_info *cm_info,
580 struct iwpm_sa_data *pm_msg)
581 {
582 nes_create_sockaddr(htonl(cm_info->loc_addr), htons(cm_info->loc_port),
583 &pm_msg->loc_addr);
584 nes_create_sockaddr(htonl(cm_info->rem_addr), htons(cm_info->rem_port),
585 &pm_msg->rem_addr);
586 }
587
588 /*
589 * nes_form_reg_msg - Form a port mapper message with dev info
590 */
nes_form_reg_msg(struct nes_vnic * nesvnic,struct iwpm_dev_data * pm_msg)591 static void nes_form_reg_msg(struct nes_vnic *nesvnic,
592 struct iwpm_dev_data *pm_msg)
593 {
594 memcpy(pm_msg->dev_name, nesvnic->nesibdev->ibdev.name,
595 IWPM_DEVNAME_SIZE);
596 memcpy(pm_msg->if_name, nesvnic->netdev->name, IWPM_IFNAME_SIZE);
597 }
598
record_sockaddr_info(struct sockaddr_storage * addr_info,nes_addr_t * ip_addr,u16 * port_num)599 static void record_sockaddr_info(struct sockaddr_storage *addr_info,
600 nes_addr_t *ip_addr, u16 *port_num)
601 {
602 struct sockaddr_in *in_addr = (struct sockaddr_in *)addr_info;
603
604 if (in_addr->sin_family == AF_INET) {
605 *ip_addr = ntohl(in_addr->sin_addr.s_addr);
606 *port_num = ntohs(in_addr->sin_port);
607 }
608 }
609
610 /*
611 * nes_record_pm_msg - Save the received mapping info
612 */
nes_record_pm_msg(struct nes_cm_info * cm_info,struct iwpm_sa_data * pm_msg)613 static void nes_record_pm_msg(struct nes_cm_info *cm_info,
614 struct iwpm_sa_data *pm_msg)
615 {
616 record_sockaddr_info(&pm_msg->mapped_loc_addr,
617 &cm_info->mapped_loc_addr, &cm_info->mapped_loc_port);
618
619 record_sockaddr_info(&pm_msg->mapped_rem_addr,
620 &cm_info->mapped_rem_addr, &cm_info->mapped_rem_port);
621 }
622
623 /*
624 * nes_get_reminfo - Get the address info of the remote connecting peer
625 */
nes_get_remote_addr(struct nes_cm_node * cm_node)626 static int nes_get_remote_addr(struct nes_cm_node *cm_node)
627 {
628 struct sockaddr_storage mapped_loc_addr, mapped_rem_addr;
629 struct sockaddr_storage remote_addr;
630 int ret;
631
632 nes_create_sockaddr(htonl(cm_node->mapped_loc_addr),
633 htons(cm_node->mapped_loc_port), &mapped_loc_addr);
634 nes_create_sockaddr(htonl(cm_node->mapped_rem_addr),
635 htons(cm_node->mapped_rem_port), &mapped_rem_addr);
636
637 ret = iwpm_get_remote_info(&mapped_loc_addr, &mapped_rem_addr,
638 &remote_addr, RDMA_NL_NES);
639 if (ret)
640 nes_debug(NES_DBG_CM, "Unable to find remote peer address info\n");
641 else
642 record_sockaddr_info(&remote_addr, &cm_node->rem_addr,
643 &cm_node->rem_port);
644 return ret;
645 }
646
647 /**
648 * print_core - dump a cm core
649 */
print_core(struct nes_cm_core * core)650 static void print_core(struct nes_cm_core *core)
651 {
652 nes_debug(NES_DBG_CM, "---------------------------------------------\n");
653 nes_debug(NES_DBG_CM, "CM Core -- (core = %p )\n", core);
654 if (!core)
655 return;
656 nes_debug(NES_DBG_CM, "---------------------------------------------\n");
657
658 nes_debug(NES_DBG_CM, "State : %u \n", core->state);
659
660 nes_debug(NES_DBG_CM, "Listen Nodes : %u \n", atomic_read(&core->listen_node_cnt));
661 nes_debug(NES_DBG_CM, "Active Nodes : %u \n", atomic_read(&core->node_cnt));
662
663 nes_debug(NES_DBG_CM, "core : %p \n", core);
664
665 nes_debug(NES_DBG_CM, "-------------- end core ---------------\n");
666 }
667
record_ird_ord(struct nes_cm_node * cm_node,u16 conn_ird,u16 conn_ord)668 static void record_ird_ord(struct nes_cm_node *cm_node,
669 u16 conn_ird, u16 conn_ord)
670 {
671 if (conn_ird > NES_MAX_IRD)
672 conn_ird = NES_MAX_IRD;
673
674 if (conn_ord > NES_MAX_ORD)
675 conn_ord = NES_MAX_ORD;
676
677 cm_node->ird_size = conn_ird;
678 cm_node->ord_size = conn_ord;
679 }
680
681 /**
682 * cm_build_mpa_frame - build a MPA V1 frame or MPA V2 frame
683 */
cm_build_mpa_frame(struct nes_cm_node * cm_node,u8 ** start_buff,u16 * buff_len,u8 * pci_mem,u8 mpa_key)684 static int cm_build_mpa_frame(struct nes_cm_node *cm_node, u8 **start_buff,
685 u16 *buff_len, u8 *pci_mem, u8 mpa_key)
686 {
687 int ret = 0;
688
689 *start_buff = (pci_mem) ? pci_mem : &cm_node->mpa_frame_buf[0];
690
691 switch (cm_node->mpa_frame_rev) {
692 case IETF_MPA_V1:
693 *start_buff = (u8 *)*start_buff + sizeof(struct ietf_rtr_msg);
694 *buff_len = sizeof(struct ietf_mpa_v1) + cm_node->mpa_frame_size;
695 build_mpa_v1(cm_node, *start_buff, mpa_key);
696 break;
697 case IETF_MPA_V2:
698 *buff_len = sizeof(struct ietf_mpa_v2) + cm_node->mpa_frame_size;
699 build_mpa_v2(cm_node, *start_buff, mpa_key);
700 break;
701 default:
702 ret = -EINVAL;
703 }
704 return ret;
705 }
706
707 /**
708 * build_mpa_v2 - build a MPA V2 frame
709 */
build_mpa_v2(struct nes_cm_node * cm_node,void * start_addr,u8 mpa_key)710 static void build_mpa_v2(struct nes_cm_node *cm_node,
711 void *start_addr, u8 mpa_key)
712 {
713 struct ietf_mpa_v2 *mpa_frame = (struct ietf_mpa_v2 *)start_addr;
714 struct ietf_rtr_msg *rtr_msg = &mpa_frame->rtr_msg;
715 u16 ctrl_ird;
716 u16 ctrl_ord;
717
718 /* initialize the upper 5 bytes of the frame */
719 build_mpa_v1(cm_node, start_addr, mpa_key);
720 mpa_frame->flags |= IETF_MPA_V2_FLAG; /* set a bit to indicate MPA V2 */
721 mpa_frame->priv_data_len += htons(IETF_RTR_MSG_SIZE);
722
723 /* initialize RTR msg */
724 if (cm_node->mpav2_ird_ord == IETF_NO_IRD_ORD) {
725 ctrl_ird = IETF_NO_IRD_ORD;
726 ctrl_ord = IETF_NO_IRD_ORD;
727 } else {
728 ctrl_ird = cm_node->ird_size & IETF_NO_IRD_ORD;
729 ctrl_ord = cm_node->ord_size & IETF_NO_IRD_ORD;
730 }
731 ctrl_ird |= IETF_PEER_TO_PEER;
732 ctrl_ird |= IETF_FLPDU_ZERO_LEN;
733
734 switch (mpa_key) {
735 case MPA_KEY_REQUEST:
736 ctrl_ord |= IETF_RDMA0_WRITE;
737 ctrl_ord |= IETF_RDMA0_READ;
738 break;
739 case MPA_KEY_REPLY:
740 switch (cm_node->send_rdma0_op) {
741 case SEND_RDMA_WRITE_ZERO:
742 ctrl_ord |= IETF_RDMA0_WRITE;
743 break;
744 case SEND_RDMA_READ_ZERO:
745 ctrl_ord |= IETF_RDMA0_READ;
746 break;
747 }
748 }
749 rtr_msg->ctrl_ird = htons(ctrl_ird);
750 rtr_msg->ctrl_ord = htons(ctrl_ord);
751 }
752
753 /**
754 * build_mpa_v1 - build a MPA V1 frame
755 */
build_mpa_v1(struct nes_cm_node * cm_node,void * start_addr,u8 mpa_key)756 static void build_mpa_v1(struct nes_cm_node *cm_node, void *start_addr, u8 mpa_key)
757 {
758 struct ietf_mpa_v1 *mpa_frame = (struct ietf_mpa_v1 *)start_addr;
759
760 switch (mpa_key) {
761 case MPA_KEY_REQUEST:
762 memcpy(mpa_frame->key, IEFT_MPA_KEY_REQ, IETF_MPA_KEY_SIZE);
763 break;
764 case MPA_KEY_REPLY:
765 memcpy(mpa_frame->key, IEFT_MPA_KEY_REP, IETF_MPA_KEY_SIZE);
766 break;
767 }
768 mpa_frame->flags = IETF_MPA_FLAGS_CRC;
769 mpa_frame->rev = cm_node->mpa_frame_rev;
770 mpa_frame->priv_data_len = htons(cm_node->mpa_frame_size);
771 }
772
build_rdma0_msg(struct nes_cm_node * cm_node,struct nes_qp ** nesqp_addr)773 static void build_rdma0_msg(struct nes_cm_node *cm_node, struct nes_qp **nesqp_addr)
774 {
775 u64 u64temp;
776 struct nes_qp *nesqp = *nesqp_addr;
777 struct nes_hw_qp_wqe *wqe = &nesqp->hwqp.sq_vbase[0];
778
779 u64temp = (unsigned long)nesqp->nesuqp_addr;
780 u64temp |= NES_SW_CONTEXT_ALIGN >> 1;
781 set_wqe_64bit_value(wqe->wqe_words, NES_IWARP_SQ_WQE_COMP_CTX_LOW_IDX, u64temp);
782
783 wqe->wqe_words[NES_IWARP_SQ_WQE_FRAG0_LOW_IDX] = 0;
784 wqe->wqe_words[NES_IWARP_SQ_WQE_FRAG0_HIGH_IDX] = 0;
785
786 switch (cm_node->send_rdma0_op) {
787 case SEND_RDMA_WRITE_ZERO:
788 nes_debug(NES_DBG_CM, "Sending first write.\n");
789 wqe->wqe_words[NES_IWARP_SQ_WQE_MISC_IDX] =
790 cpu_to_le32(NES_IWARP_SQ_OP_RDMAW);
791 wqe->wqe_words[NES_IWARP_SQ_WQE_TOTAL_PAYLOAD_IDX] = 0;
792 wqe->wqe_words[NES_IWARP_SQ_WQE_LENGTH0_IDX] = 0;
793 wqe->wqe_words[NES_IWARP_SQ_WQE_STAG0_IDX] = 0;
794 break;
795
796 case SEND_RDMA_READ_ZERO:
797 default:
798 if (cm_node->send_rdma0_op != SEND_RDMA_READ_ZERO)
799 WARN(1, "Unsupported RDMA0 len operation=%u\n",
800 cm_node->send_rdma0_op);
801 nes_debug(NES_DBG_CM, "Sending first rdma operation.\n");
802 wqe->wqe_words[NES_IWARP_SQ_WQE_MISC_IDX] =
803 cpu_to_le32(NES_IWARP_SQ_OP_RDMAR);
804 wqe->wqe_words[NES_IWARP_SQ_WQE_RDMA_TO_LOW_IDX] = 1;
805 wqe->wqe_words[NES_IWARP_SQ_WQE_RDMA_TO_HIGH_IDX] = 0;
806 wqe->wqe_words[NES_IWARP_SQ_WQE_RDMA_LENGTH_IDX] = 0;
807 wqe->wqe_words[NES_IWARP_SQ_WQE_RDMA_STAG_IDX] = 1;
808 wqe->wqe_words[NES_IWARP_SQ_WQE_STAG0_IDX] = 1;
809 break;
810 }
811
812 if (nesqp->sq_kmapped) {
813 nesqp->sq_kmapped = 0;
814 kunmap(nesqp->page);
815 }
816
817 /*use the reserved spot on the WQ for the extra first WQE*/
818 nesqp->nesqp_context->ird_ord_sizes &= cpu_to_le32(~(NES_QPCONTEXT_ORDIRD_LSMM_PRESENT |
819 NES_QPCONTEXT_ORDIRD_WRPDU |
820 NES_QPCONTEXT_ORDIRD_ALSMM));
821 nesqp->skip_lsmm = 1;
822 nesqp->hwqp.sq_tail = 0;
823 }
824
825 /**
826 * schedule_nes_timer
827 * note - cm_node needs to be protected before calling this. Encase in:
828 * rem_ref_cm_node(cm_core, cm_node);add_ref_cm_node(cm_node);
829 */
schedule_nes_timer(struct nes_cm_node * cm_node,struct sk_buff * skb,enum nes_timer_type type,int send_retrans,int close_when_complete)830 int schedule_nes_timer(struct nes_cm_node *cm_node, struct sk_buff *skb,
831 enum nes_timer_type type, int send_retrans,
832 int close_when_complete)
833 {
834 unsigned long flags;
835 struct nes_cm_core *cm_core = cm_node->cm_core;
836 struct nes_timer_entry *new_send;
837 int ret = 0;
838
839 new_send = kzalloc(sizeof(*new_send), GFP_ATOMIC);
840 if (!new_send)
841 return -ENOMEM;
842
843 /* new_send->timetosend = currenttime */
844 new_send->retrycount = NES_DEFAULT_RETRYS;
845 new_send->retranscount = NES_DEFAULT_RETRANS;
846 new_send->skb = skb;
847 new_send->timetosend = jiffies;
848 new_send->type = type;
849 new_send->netdev = cm_node->netdev;
850 new_send->send_retrans = send_retrans;
851 new_send->close_when_complete = close_when_complete;
852
853 if (type == NES_TIMER_TYPE_CLOSE) {
854 new_send->timetosend += (HZ / 10);
855 if (cm_node->recv_entry) {
856 kfree(new_send);
857 WARN_ON(1);
858 return -EINVAL;
859 }
860 cm_node->recv_entry = new_send;
861 }
862
863 if (type == NES_TIMER_TYPE_SEND) {
864 new_send->seq_num = ntohl(tcp_hdr(skb)->seq);
865 atomic_inc(&new_send->skb->users);
866 spin_lock_irqsave(&cm_node->retrans_list_lock, flags);
867 cm_node->send_entry = new_send;
868 add_ref_cm_node(cm_node);
869 spin_unlock_irqrestore(&cm_node->retrans_list_lock, flags);
870 new_send->timetosend = jiffies + NES_RETRY_TIMEOUT;
871
872 ret = nes_nic_cm_xmit(new_send->skb, cm_node->netdev);
873 if (ret != NETDEV_TX_OK) {
874 nes_debug(NES_DBG_CM, "Error sending packet %p "
875 "(jiffies = %lu)\n", new_send, jiffies);
876 new_send->timetosend = jiffies;
877 ret = NETDEV_TX_OK;
878 } else {
879 cm_packets_sent++;
880 if (!send_retrans) {
881 cleanup_retrans_entry(cm_node);
882 if (close_when_complete)
883 rem_ref_cm_node(cm_core, cm_node);
884 return ret;
885 }
886 }
887 }
888
889 if (!timer_pending(&cm_core->tcp_timer))
890 mod_timer(&cm_core->tcp_timer, new_send->timetosend);
891
892 return ret;
893 }
894
nes_retrans_expired(struct nes_cm_node * cm_node)895 static void nes_retrans_expired(struct nes_cm_node *cm_node)
896 {
897 struct iw_cm_id *cm_id = cm_node->cm_id;
898 enum nes_cm_node_state state = cm_node->state;
899 cm_node->state = NES_CM_STATE_CLOSED;
900
901 switch (state) {
902 case NES_CM_STATE_SYN_RCVD:
903 case NES_CM_STATE_CLOSING:
904 rem_ref_cm_node(cm_node->cm_core, cm_node);
905 break;
906 case NES_CM_STATE_LAST_ACK:
907 case NES_CM_STATE_FIN_WAIT1:
908 if (cm_node->cm_id)
909 cm_id->rem_ref(cm_id);
910 send_reset(cm_node, NULL);
911 break;
912 default:
913 add_ref_cm_node(cm_node);
914 send_reset(cm_node, NULL);
915 create_event(cm_node, NES_CM_EVENT_ABORTED);
916 }
917 }
918
handle_recv_entry(struct nes_cm_node * cm_node,u32 rem_node)919 static void handle_recv_entry(struct nes_cm_node *cm_node, u32 rem_node)
920 {
921 struct nes_timer_entry *recv_entry = cm_node->recv_entry;
922 struct iw_cm_id *cm_id = cm_node->cm_id;
923 struct nes_qp *nesqp;
924 unsigned long qplockflags;
925
926 if (!recv_entry)
927 return;
928 nesqp = (struct nes_qp *)recv_entry->skb;
929 if (nesqp) {
930 spin_lock_irqsave(&nesqp->lock, qplockflags);
931 if (nesqp->cm_id) {
932 nes_debug(NES_DBG_CM, "QP%u: cm_id = %p, "
933 "refcount = %d: HIT A "
934 "NES_TIMER_TYPE_CLOSE with something "
935 "to do!!!\n", nesqp->hwqp.qp_id, cm_id,
936 atomic_read(&nesqp->refcount));
937 nesqp->hw_tcp_state = NES_AEQE_TCP_STATE_CLOSED;
938 nesqp->last_aeq = NES_AEQE_AEID_RESET_SENT;
939 nesqp->ibqp_state = IB_QPS_ERR;
940 spin_unlock_irqrestore(&nesqp->lock, qplockflags);
941 nes_cm_disconn(nesqp);
942 } else {
943 spin_unlock_irqrestore(&nesqp->lock, qplockflags);
944 nes_debug(NES_DBG_CM, "QP%u: cm_id = %p, "
945 "refcount = %d: HIT A "
946 "NES_TIMER_TYPE_CLOSE with nothing "
947 "to do!!!\n", nesqp->hwqp.qp_id, cm_id,
948 atomic_read(&nesqp->refcount));
949 }
950 } else if (rem_node) {
951 /* TIME_WAIT state */
952 rem_ref_cm_node(cm_node->cm_core, cm_node);
953 }
954 if (cm_node->cm_id)
955 cm_id->rem_ref(cm_id);
956 kfree(recv_entry);
957 cm_node->recv_entry = NULL;
958 }
959
960 /**
961 * nes_cm_timer_tick
962 */
nes_cm_timer_tick(unsigned long pass)963 static void nes_cm_timer_tick(unsigned long pass)
964 {
965 unsigned long flags;
966 unsigned long nexttimeout = jiffies + NES_LONG_TIME;
967 struct nes_cm_node *cm_node;
968 struct nes_timer_entry *send_entry, *recv_entry;
969 struct list_head *list_core_temp;
970 struct list_head *list_node;
971 struct nes_cm_core *cm_core = g_cm_core;
972 u32 settimer = 0;
973 unsigned long timetosend;
974 int ret = NETDEV_TX_OK;
975
976 struct list_head timer_list;
977
978 INIT_LIST_HEAD(&timer_list);
979 spin_lock_irqsave(&cm_core->ht_lock, flags);
980
981 list_for_each_safe(list_node, list_core_temp,
982 &cm_core->connected_nodes) {
983 cm_node = container_of(list_node, struct nes_cm_node, list);
984 if ((cm_node->recv_entry) || (cm_node->send_entry)) {
985 add_ref_cm_node(cm_node);
986 list_add(&cm_node->timer_entry, &timer_list);
987 }
988 }
989 spin_unlock_irqrestore(&cm_core->ht_lock, flags);
990
991 list_for_each_safe(list_node, list_core_temp, &timer_list) {
992 cm_node = container_of(list_node, struct nes_cm_node,
993 timer_entry);
994 recv_entry = cm_node->recv_entry;
995
996 if (recv_entry) {
997 if (time_after(recv_entry->timetosend, jiffies)) {
998 if (nexttimeout > recv_entry->timetosend ||
999 !settimer) {
1000 nexttimeout = recv_entry->timetosend;
1001 settimer = 1;
1002 }
1003 } else {
1004 handle_recv_entry(cm_node, 1);
1005 }
1006 }
1007
1008 spin_lock_irqsave(&cm_node->retrans_list_lock, flags);
1009 do {
1010 send_entry = cm_node->send_entry;
1011 if (!send_entry)
1012 break;
1013 if (time_after(send_entry->timetosend, jiffies)) {
1014 if (cm_node->state != NES_CM_STATE_TSA) {
1015 if ((nexttimeout >
1016 send_entry->timetosend) ||
1017 !settimer) {
1018 nexttimeout =
1019 send_entry->timetosend;
1020 settimer = 1;
1021 }
1022 } else {
1023 free_retrans_entry(cm_node);
1024 }
1025 break;
1026 }
1027
1028 if ((cm_node->state == NES_CM_STATE_TSA) ||
1029 (cm_node->state == NES_CM_STATE_CLOSED)) {
1030 free_retrans_entry(cm_node);
1031 break;
1032 }
1033
1034 if (!send_entry->retranscount ||
1035 !send_entry->retrycount) {
1036 cm_packets_dropped++;
1037 free_retrans_entry(cm_node);
1038
1039 spin_unlock_irqrestore(
1040 &cm_node->retrans_list_lock, flags);
1041 nes_retrans_expired(cm_node);
1042 cm_node->state = NES_CM_STATE_CLOSED;
1043 spin_lock_irqsave(&cm_node->retrans_list_lock,
1044 flags);
1045 break;
1046 }
1047 atomic_inc(&send_entry->skb->users);
1048 cm_packets_retrans++;
1049 nes_debug(NES_DBG_CM, "Retransmitting send_entry %p "
1050 "for node %p, jiffies = %lu, time to send = "
1051 "%lu, retranscount = %u, send_entry->seq_num = "
1052 "0x%08X, cm_node->tcp_cntxt.rem_ack_num = "
1053 "0x%08X\n", send_entry, cm_node, jiffies,
1054 send_entry->timetosend,
1055 send_entry->retranscount,
1056 send_entry->seq_num,
1057 cm_node->tcp_cntxt.rem_ack_num);
1058
1059 spin_unlock_irqrestore(&cm_node->retrans_list_lock,
1060 flags);
1061 ret = nes_nic_cm_xmit(send_entry->skb, cm_node->netdev);
1062 spin_lock_irqsave(&cm_node->retrans_list_lock, flags);
1063 if (ret != NETDEV_TX_OK) {
1064 nes_debug(NES_DBG_CM, "rexmit failed for "
1065 "node=%p\n", cm_node);
1066 cm_packets_bounced++;
1067 send_entry->retrycount--;
1068 nexttimeout = jiffies + NES_SHORT_TIME;
1069 settimer = 1;
1070 break;
1071 } else {
1072 cm_packets_sent++;
1073 }
1074 nes_debug(NES_DBG_CM, "Packet Sent: retrans count = "
1075 "%u, retry count = %u.\n",
1076 send_entry->retranscount,
1077 send_entry->retrycount);
1078 if (send_entry->send_retrans) {
1079 send_entry->retranscount--;
1080 timetosend = (NES_RETRY_TIMEOUT <<
1081 (NES_DEFAULT_RETRANS - send_entry->retranscount));
1082
1083 send_entry->timetosend = jiffies +
1084 min(timetosend, NES_MAX_TIMEOUT);
1085 if (nexttimeout > send_entry->timetosend ||
1086 !settimer) {
1087 nexttimeout = send_entry->timetosend;
1088 settimer = 1;
1089 }
1090 } else {
1091 int close_when_complete;
1092 close_when_complete =
1093 send_entry->close_when_complete;
1094 nes_debug(NES_DBG_CM, "cm_node=%p state=%d\n",
1095 cm_node, cm_node->state);
1096 free_retrans_entry(cm_node);
1097 if (close_when_complete)
1098 rem_ref_cm_node(cm_node->cm_core,
1099 cm_node);
1100 }
1101 } while (0);
1102
1103 spin_unlock_irqrestore(&cm_node->retrans_list_lock, flags);
1104 rem_ref_cm_node(cm_node->cm_core, cm_node);
1105 }
1106
1107 if (settimer) {
1108 if (!timer_pending(&cm_core->tcp_timer))
1109 mod_timer(&cm_core->tcp_timer, nexttimeout);
1110 }
1111 }
1112
1113
1114 /**
1115 * send_syn
1116 */
send_syn(struct nes_cm_node * cm_node,u32 sendack,struct sk_buff * skb)1117 static int send_syn(struct nes_cm_node *cm_node, u32 sendack,
1118 struct sk_buff *skb)
1119 {
1120 int ret;
1121 int flags = SET_SYN;
1122 char optionsbuffer[sizeof(struct option_mss) +
1123 sizeof(struct option_windowscale) + sizeof(struct option_base) +
1124 TCP_OPTIONS_PADDING];
1125
1126 int optionssize = 0;
1127 /* Sending MSS option */
1128 union all_known_options *options;
1129
1130 if (!cm_node)
1131 return -EINVAL;
1132
1133 options = (union all_known_options *)&optionsbuffer[optionssize];
1134 options->as_mss.optionnum = OPTION_NUMBER_MSS;
1135 options->as_mss.length = sizeof(struct option_mss);
1136 options->as_mss.mss = htons(cm_node->tcp_cntxt.mss);
1137 optionssize += sizeof(struct option_mss);
1138
1139 options = (union all_known_options *)&optionsbuffer[optionssize];
1140 options->as_windowscale.optionnum = OPTION_NUMBER_WINDOW_SCALE;
1141 options->as_windowscale.length = sizeof(struct option_windowscale);
1142 options->as_windowscale.shiftcount = cm_node->tcp_cntxt.rcv_wscale;
1143 optionssize += sizeof(struct option_windowscale);
1144
1145 if (sendack && !(NES_DRV_OPT_SUPRESS_OPTION_BC & nes_drv_opt)) {
1146 options = (union all_known_options *)&optionsbuffer[optionssize];
1147 options->as_base.optionnum = OPTION_NUMBER_WRITE0;
1148 options->as_base.length = sizeof(struct option_base);
1149 optionssize += sizeof(struct option_base);
1150 /* we need the size to be a multiple of 4 */
1151 options = (union all_known_options *)&optionsbuffer[optionssize];
1152 options->as_end = 1;
1153 optionssize += 1;
1154 options = (union all_known_options *)&optionsbuffer[optionssize];
1155 options->as_end = 1;
1156 optionssize += 1;
1157 }
1158
1159 options = (union all_known_options *)&optionsbuffer[optionssize];
1160 options->as_end = OPTION_NUMBER_END;
1161 optionssize += 1;
1162
1163 if (!skb)
1164 skb = dev_alloc_skb(MAX_CM_BUFFER);
1165 if (!skb) {
1166 nes_debug(NES_DBG_CM, "Failed to get a Free pkt\n");
1167 return -1;
1168 }
1169
1170 if (sendack)
1171 flags |= SET_ACK;
1172
1173 form_cm_frame(skb, cm_node, optionsbuffer, optionssize, NULL, 0, flags);
1174 ret = schedule_nes_timer(cm_node, skb, NES_TIMER_TYPE_SEND, 1, 0);
1175
1176 return ret;
1177 }
1178
1179
1180 /**
1181 * send_reset
1182 */
send_reset(struct nes_cm_node * cm_node,struct sk_buff * skb)1183 static int send_reset(struct nes_cm_node *cm_node, struct sk_buff *skb)
1184 {
1185 int ret;
1186 int flags = SET_RST | SET_ACK;
1187
1188 if (!skb)
1189 skb = dev_alloc_skb(MAX_CM_BUFFER);
1190 if (!skb) {
1191 nes_debug(NES_DBG_CM, "Failed to get a Free pkt\n");
1192 return -ENOMEM;
1193 }
1194
1195 form_cm_frame(skb, cm_node, NULL, 0, NULL, 0, flags);
1196 ret = schedule_nes_timer(cm_node, skb, NES_TIMER_TYPE_SEND, 0, 1);
1197
1198 return ret;
1199 }
1200
1201
1202 /**
1203 * send_ack
1204 */
send_ack(struct nes_cm_node * cm_node,struct sk_buff * skb)1205 static int send_ack(struct nes_cm_node *cm_node, struct sk_buff *skb)
1206 {
1207 int ret;
1208
1209 if (!skb)
1210 skb = dev_alloc_skb(MAX_CM_BUFFER);
1211
1212 if (!skb) {
1213 nes_debug(NES_DBG_CM, "Failed to get a Free pkt\n");
1214 return -1;
1215 }
1216
1217 form_cm_frame(skb, cm_node, NULL, 0, NULL, 0, SET_ACK);
1218 ret = schedule_nes_timer(cm_node, skb, NES_TIMER_TYPE_SEND, 0, 0);
1219
1220 return ret;
1221 }
1222
1223
1224 /**
1225 * send_fin
1226 */
send_fin(struct nes_cm_node * cm_node,struct sk_buff * skb)1227 static int send_fin(struct nes_cm_node *cm_node, struct sk_buff *skb)
1228 {
1229 int ret;
1230
1231 /* if we didn't get a frame get one */
1232 if (!skb)
1233 skb = dev_alloc_skb(MAX_CM_BUFFER);
1234
1235 if (!skb) {
1236 nes_debug(NES_DBG_CM, "Failed to get a Free pkt\n");
1237 return -1;
1238 }
1239
1240 form_cm_frame(skb, cm_node, NULL, 0, NULL, 0, SET_ACK | SET_FIN);
1241 ret = schedule_nes_timer(cm_node, skb, NES_TIMER_TYPE_SEND, 1, 0);
1242
1243 return ret;
1244 }
1245
1246
1247 /**
1248 * find_node - find a cm node that matches the reference cm node
1249 */
find_node(struct nes_cm_core * cm_core,u16 rem_port,nes_addr_t rem_addr,u16 loc_port,nes_addr_t loc_addr)1250 static struct nes_cm_node *find_node(struct nes_cm_core *cm_core,
1251 u16 rem_port, nes_addr_t rem_addr, u16 loc_port, nes_addr_t loc_addr)
1252 {
1253 unsigned long flags;
1254 struct list_head *hte;
1255 struct nes_cm_node *cm_node;
1256
1257 /* get a handle on the hte */
1258 hte = &cm_core->connected_nodes;
1259
1260 /* walk list and find cm_node associated with this session ID */
1261 spin_lock_irqsave(&cm_core->ht_lock, flags);
1262 list_for_each_entry(cm_node, hte, list) {
1263 /* compare quad, return node handle if a match */
1264 nes_debug(NES_DBG_CM, "finding node %x:%x =? %x:%x ^ %x:%x =? %x:%x\n",
1265 cm_node->loc_addr, cm_node->loc_port,
1266 loc_addr, loc_port,
1267 cm_node->rem_addr, cm_node->rem_port,
1268 rem_addr, rem_port);
1269 if ((cm_node->mapped_loc_addr == loc_addr) &&
1270 (cm_node->mapped_loc_port == loc_port) &&
1271 (cm_node->mapped_rem_addr == rem_addr) &&
1272 (cm_node->mapped_rem_port == rem_port)) {
1273
1274 add_ref_cm_node(cm_node);
1275 spin_unlock_irqrestore(&cm_core->ht_lock, flags);
1276 return cm_node;
1277 }
1278 }
1279 spin_unlock_irqrestore(&cm_core->ht_lock, flags);
1280
1281 /* no owner node */
1282 return NULL;
1283 }
1284
1285
1286 /**
1287 * find_listener - find a cm node listening on this addr-port pair
1288 */
find_listener(struct nes_cm_core * cm_core,nes_addr_t dst_addr,u16 dst_port,enum nes_cm_listener_state listener_state,int local)1289 static struct nes_cm_listener *find_listener(struct nes_cm_core *cm_core,
1290 nes_addr_t dst_addr, u16 dst_port,
1291 enum nes_cm_listener_state listener_state, int local)
1292 {
1293 unsigned long flags;
1294 struct nes_cm_listener *listen_node;
1295 nes_addr_t listen_addr;
1296 u16 listen_port;
1297
1298 /* walk list and find cm_node associated with this session ID */
1299 spin_lock_irqsave(&cm_core->listen_list_lock, flags);
1300 list_for_each_entry(listen_node, &cm_core->listen_list.list, list) {
1301 if (local) {
1302 listen_addr = listen_node->loc_addr;
1303 listen_port = listen_node->loc_port;
1304 } else {
1305 listen_addr = listen_node->mapped_loc_addr;
1306 listen_port = listen_node->mapped_loc_port;
1307 }
1308 /* compare node pair, return node handle if a match */
1309 if (((listen_addr == dst_addr) ||
1310 listen_addr == 0x00000000) &&
1311 (listen_port == dst_port) &&
1312 (listener_state & listen_node->listener_state)) {
1313 atomic_inc(&listen_node->ref_count);
1314 spin_unlock_irqrestore(&cm_core->listen_list_lock, flags);
1315 return listen_node;
1316 }
1317 }
1318 spin_unlock_irqrestore(&cm_core->listen_list_lock, flags);
1319
1320 /* no listener */
1321 return NULL;
1322 }
1323
1324 /**
1325 * add_hte_node - add a cm node to the hash table
1326 */
add_hte_node(struct nes_cm_core * cm_core,struct nes_cm_node * cm_node)1327 static int add_hte_node(struct nes_cm_core *cm_core, struct nes_cm_node *cm_node)
1328 {
1329 unsigned long flags;
1330 struct list_head *hte;
1331
1332 if (!cm_node || !cm_core)
1333 return -EINVAL;
1334
1335 nes_debug(NES_DBG_CM, "Adding Node %p to Active Connection HT\n",
1336 cm_node);
1337
1338 spin_lock_irqsave(&cm_core->ht_lock, flags);
1339
1340 /* get a handle on the hash table element (list head for this slot) */
1341 hte = &cm_core->connected_nodes;
1342 list_add_tail(&cm_node->list, hte);
1343 atomic_inc(&cm_core->ht_node_cnt);
1344
1345 spin_unlock_irqrestore(&cm_core->ht_lock, flags);
1346
1347 return 0;
1348 }
1349
1350
1351 /**
1352 * mini_cm_dec_refcnt_listen
1353 */
mini_cm_dec_refcnt_listen(struct nes_cm_core * cm_core,struct nes_cm_listener * listener,int free_hanging_nodes)1354 static int mini_cm_dec_refcnt_listen(struct nes_cm_core *cm_core,
1355 struct nes_cm_listener *listener, int free_hanging_nodes)
1356 {
1357 int ret = -EINVAL;
1358 int err = 0;
1359 unsigned long flags;
1360 struct list_head *list_pos = NULL;
1361 struct list_head *list_temp = NULL;
1362 struct nes_cm_node *cm_node = NULL;
1363 struct list_head reset_list;
1364
1365 nes_debug(NES_DBG_CM, "attempting listener= %p free_nodes= %d, "
1366 "refcnt=%d\n", listener, free_hanging_nodes,
1367 atomic_read(&listener->ref_count));
1368 /* free non-accelerated child nodes for this listener */
1369 INIT_LIST_HEAD(&reset_list);
1370 if (free_hanging_nodes) {
1371 spin_lock_irqsave(&cm_core->ht_lock, flags);
1372 list_for_each_safe(list_pos, list_temp,
1373 &g_cm_core->connected_nodes) {
1374 cm_node = container_of(list_pos, struct nes_cm_node,
1375 list);
1376 if ((cm_node->listener == listener) &&
1377 (!cm_node->accelerated)) {
1378 add_ref_cm_node(cm_node);
1379 list_add(&cm_node->reset_entry, &reset_list);
1380 }
1381 }
1382 spin_unlock_irqrestore(&cm_core->ht_lock, flags);
1383 }
1384
1385 list_for_each_safe(list_pos, list_temp, &reset_list) {
1386 cm_node = container_of(list_pos, struct nes_cm_node,
1387 reset_entry);
1388 {
1389 struct nes_cm_node *loopback = cm_node->loopbackpartner;
1390 enum nes_cm_node_state old_state;
1391 if (NES_CM_STATE_FIN_WAIT1 <= cm_node->state) {
1392 rem_ref_cm_node(cm_node->cm_core, cm_node);
1393 } else {
1394 if (!loopback) {
1395 cleanup_retrans_entry(cm_node);
1396 err = send_reset(cm_node, NULL);
1397 if (err) {
1398 cm_node->state =
1399 NES_CM_STATE_CLOSED;
1400 WARN_ON(1);
1401 } else {
1402 old_state = cm_node->state;
1403 cm_node->state = NES_CM_STATE_LISTENER_DESTROYED;
1404 if (old_state != NES_CM_STATE_MPAREQ_RCVD)
1405 rem_ref_cm_node(
1406 cm_node->cm_core,
1407 cm_node);
1408 }
1409 } else {
1410 struct nes_cm_event event;
1411
1412 event.cm_node = loopback;
1413 event.cm_info.rem_addr =
1414 loopback->rem_addr;
1415 event.cm_info.loc_addr =
1416 loopback->loc_addr;
1417 event.cm_info.rem_port =
1418 loopback->rem_port;
1419 event.cm_info.loc_port =
1420 loopback->loc_port;
1421 event.cm_info.cm_id = loopback->cm_id;
1422 add_ref_cm_node(loopback);
1423 loopback->state = NES_CM_STATE_CLOSED;
1424 cm_event_connect_error(&event);
1425 cm_node->state = NES_CM_STATE_LISTENER_DESTROYED;
1426
1427 rem_ref_cm_node(cm_node->cm_core,
1428 cm_node);
1429
1430 }
1431 }
1432 }
1433 }
1434
1435 spin_lock_irqsave(&cm_core->listen_list_lock, flags);
1436 if (!atomic_dec_return(&listener->ref_count)) {
1437 list_del(&listener->list);
1438
1439 /* decrement our listen node count */
1440 atomic_dec(&cm_core->listen_node_cnt);
1441
1442 spin_unlock_irqrestore(&cm_core->listen_list_lock, flags);
1443
1444 if (listener->nesvnic) {
1445 nes_manage_apbvt(listener->nesvnic,
1446 listener->mapped_loc_port,
1447 PCI_FUNC(listener->nesvnic->nesdev->pcidev->devfn),
1448 NES_MANAGE_APBVT_DEL);
1449
1450 nes_remove_mapinfo(listener->loc_addr,
1451 listener->loc_port,
1452 listener->mapped_loc_addr,
1453 listener->mapped_loc_port);
1454 nes_debug(NES_DBG_NLMSG,
1455 "Delete APBVT mapped_loc_port = %04X\n",
1456 listener->mapped_loc_port);
1457 }
1458
1459 nes_debug(NES_DBG_CM, "destroying listener (%p)\n", listener);
1460
1461 kfree(listener);
1462 listener = NULL;
1463 ret = 0;
1464 atomic_inc(&cm_listens_destroyed);
1465 } else {
1466 spin_unlock_irqrestore(&cm_core->listen_list_lock, flags);
1467 }
1468 if (listener) {
1469 if (atomic_read(&listener->pend_accepts_cnt) > 0)
1470 nes_debug(NES_DBG_CM, "destroying listener (%p)"
1471 " with non-zero pending accepts=%u\n",
1472 listener, atomic_read(&listener->pend_accepts_cnt));
1473 }
1474
1475 return ret;
1476 }
1477
1478
1479 /**
1480 * mini_cm_del_listen
1481 */
mini_cm_del_listen(struct nes_cm_core * cm_core,struct nes_cm_listener * listener)1482 static int mini_cm_del_listen(struct nes_cm_core *cm_core,
1483 struct nes_cm_listener *listener)
1484 {
1485 listener->listener_state = NES_CM_LISTENER_PASSIVE_STATE;
1486 listener->cm_id = NULL; /* going to be destroyed pretty soon */
1487 return mini_cm_dec_refcnt_listen(cm_core, listener, 1);
1488 }
1489
1490
1491 /**
1492 * mini_cm_accelerated
1493 */
mini_cm_accelerated(struct nes_cm_core * cm_core,struct nes_cm_node * cm_node)1494 static inline int mini_cm_accelerated(struct nes_cm_core *cm_core,
1495 struct nes_cm_node *cm_node)
1496 {
1497 cm_node->accelerated = 1;
1498
1499 if (cm_node->accept_pend) {
1500 BUG_ON(!cm_node->listener);
1501 atomic_dec(&cm_node->listener->pend_accepts_cnt);
1502 cm_node->accept_pend = 0;
1503 BUG_ON(atomic_read(&cm_node->listener->pend_accepts_cnt) < 0);
1504 }
1505
1506 if (!timer_pending(&cm_core->tcp_timer))
1507 mod_timer(&cm_core->tcp_timer, (jiffies + NES_SHORT_TIME));
1508
1509 return 0;
1510 }
1511
1512
1513 /**
1514 * nes_addr_resolve_neigh
1515 */
nes_addr_resolve_neigh(struct nes_vnic * nesvnic,u32 dst_ip,int arpindex)1516 static int nes_addr_resolve_neigh(struct nes_vnic *nesvnic, u32 dst_ip, int arpindex)
1517 {
1518 struct rtable *rt;
1519 struct neighbour *neigh;
1520 int rc = arpindex;
1521 struct net_device *netdev;
1522 struct nes_adapter *nesadapter = nesvnic->nesdev->nesadapter;
1523 __be32 dst_ipaddr = htonl(dst_ip);
1524
1525 rt = ip_route_output(&init_net, dst_ipaddr, nesvnic->local_ipaddr, 0, 0);
1526 if (IS_ERR(rt)) {
1527 printk(KERN_ERR "%s: ip_route_output_key failed for 0x%08X\n",
1528 __func__, dst_ip);
1529 return rc;
1530 }
1531
1532 if (netif_is_bond_slave(nesvnic->netdev))
1533 netdev = netdev_master_upper_dev_get(nesvnic->netdev);
1534 else
1535 netdev = nesvnic->netdev;
1536
1537 neigh = dst_neigh_lookup(&rt->dst, &dst_ipaddr);
1538
1539 rcu_read_lock();
1540 if (neigh) {
1541 if (neigh->nud_state & NUD_VALID) {
1542 nes_debug(NES_DBG_CM, "Neighbor MAC address for 0x%08X"
1543 " is %pM, Gateway is 0x%08X \n", dst_ip,
1544 neigh->ha, ntohl(rt->rt_gateway));
1545
1546 if (arpindex >= 0) {
1547 if (ether_addr_equal(nesadapter->arp_table[arpindex].mac_addr, neigh->ha)) {
1548 /* Mac address same as in nes_arp_table */
1549 goto out;
1550 }
1551
1552 nes_manage_arp_cache(nesvnic->netdev,
1553 nesadapter->arp_table[arpindex].mac_addr,
1554 dst_ip, NES_ARP_DELETE);
1555 }
1556
1557 nes_manage_arp_cache(nesvnic->netdev, neigh->ha,
1558 dst_ip, NES_ARP_ADD);
1559 rc = nes_arp_table(nesvnic->nesdev, dst_ip, NULL,
1560 NES_ARP_RESOLVE);
1561 } else {
1562 neigh_event_send(neigh, NULL);
1563 }
1564 }
1565 out:
1566 rcu_read_unlock();
1567
1568 if (neigh)
1569 neigh_release(neigh);
1570
1571 ip_rt_put(rt);
1572 return rc;
1573 }
1574
1575 /**
1576 * make_cm_node - create a new instance of a cm node
1577 */
make_cm_node(struct nes_cm_core * cm_core,struct nes_vnic * nesvnic,struct nes_cm_info * cm_info,struct nes_cm_listener * listener)1578 static struct nes_cm_node *make_cm_node(struct nes_cm_core *cm_core,
1579 struct nes_vnic *nesvnic, struct nes_cm_info *cm_info,
1580 struct nes_cm_listener *listener)
1581 {
1582 struct nes_cm_node *cm_node;
1583 struct timespec ts;
1584 int oldarpindex = 0;
1585 int arpindex = 0;
1586 struct nes_device *nesdev;
1587 struct nes_adapter *nesadapter;
1588
1589 /* create an hte and cm_node for this instance */
1590 cm_node = kzalloc(sizeof(*cm_node), GFP_ATOMIC);
1591 if (!cm_node)
1592 return NULL;
1593
1594 /* set our node specific transport info */
1595 if (listener) {
1596 cm_node->loc_addr = listener->loc_addr;
1597 cm_node->loc_port = listener->loc_port;
1598 } else {
1599 cm_node->loc_addr = cm_info->loc_addr;
1600 cm_node->loc_port = cm_info->loc_port;
1601 }
1602 cm_node->rem_addr = cm_info->rem_addr;
1603 cm_node->rem_port = cm_info->rem_port;
1604
1605 cm_node->mapped_loc_addr = cm_info->mapped_loc_addr;
1606 cm_node->mapped_rem_addr = cm_info->mapped_rem_addr;
1607 cm_node->mapped_loc_port = cm_info->mapped_loc_port;
1608 cm_node->mapped_rem_port = cm_info->mapped_rem_port;
1609
1610 cm_node->mpa_frame_rev = mpa_version;
1611 cm_node->send_rdma0_op = SEND_RDMA_READ_ZERO;
1612 cm_node->mpav2_ird_ord = 0;
1613 cm_node->ird_size = 0;
1614 cm_node->ord_size = 0;
1615
1616 nes_debug(NES_DBG_CM, "Make node addresses : loc = %pI4:%x, rem = %pI4:%x\n",
1617 &cm_node->loc_addr, cm_node->loc_port,
1618 &cm_node->rem_addr, cm_node->rem_port);
1619 cm_node->listener = listener;
1620 if (listener)
1621 cm_node->tos = listener->tos;
1622 cm_node->netdev = nesvnic->netdev;
1623 cm_node->cm_id = cm_info->cm_id;
1624 memcpy(cm_node->loc_mac, nesvnic->netdev->dev_addr, ETH_ALEN);
1625
1626 nes_debug(NES_DBG_CM, "listener=%p, cm_id=%p\n", cm_node->listener,
1627 cm_node->cm_id);
1628
1629 spin_lock_init(&cm_node->retrans_list_lock);
1630
1631 cm_node->loopbackpartner = NULL;
1632 atomic_set(&cm_node->ref_count, 1);
1633 /* associate our parent CM core */
1634 cm_node->cm_core = cm_core;
1635 cm_node->tcp_cntxt.loc_id = NES_CM_DEF_LOCAL_ID;
1636 cm_node->tcp_cntxt.rcv_wscale = NES_CM_DEFAULT_RCV_WND_SCALE;
1637 cm_node->tcp_cntxt.rcv_wnd = NES_CM_DEFAULT_RCV_WND_SCALED >>
1638 NES_CM_DEFAULT_RCV_WND_SCALE;
1639 ts = current_kernel_time();
1640 cm_node->tcp_cntxt.loc_seq_num = htonl(ts.tv_nsec);
1641 cm_node->tcp_cntxt.mss = nesvnic->max_frame_size - sizeof(struct iphdr) -
1642 sizeof(struct tcphdr) - ETH_HLEN - VLAN_HLEN;
1643 cm_node->tcp_cntxt.rcv_nxt = 0;
1644 /* get a unique session ID , add thread_id to an upcounter to handle race */
1645 atomic_inc(&cm_core->node_cnt);
1646 cm_node->conn_type = cm_info->conn_type;
1647 cm_node->apbvt_set = 0;
1648 cm_node->accept_pend = 0;
1649
1650 cm_node->nesvnic = nesvnic;
1651 /* get some device handles, for arp lookup */
1652 nesdev = nesvnic->nesdev;
1653 nesadapter = nesdev->nesadapter;
1654
1655 cm_node->loopbackpartner = NULL;
1656
1657 /* get the mac addr for the remote node */
1658 oldarpindex = nes_arp_table(nesdev, cm_node->mapped_rem_addr,
1659 NULL, NES_ARP_RESOLVE);
1660 arpindex = nes_addr_resolve_neigh(nesvnic,
1661 cm_node->mapped_rem_addr, oldarpindex);
1662 if (arpindex < 0) {
1663 kfree(cm_node);
1664 return NULL;
1665 }
1666
1667 /* copy the mac addr to node context */
1668 memcpy(cm_node->rem_mac, nesadapter->arp_table[arpindex].mac_addr, ETH_ALEN);
1669 nes_debug(NES_DBG_CM, "Remote mac addr from arp table: %pM\n",
1670 cm_node->rem_mac);
1671
1672 add_hte_node(cm_core, cm_node);
1673 atomic_inc(&cm_nodes_created);
1674
1675 return cm_node;
1676 }
1677
1678
1679 /**
1680 * add_ref_cm_node - destroy an instance of a cm node
1681 */
add_ref_cm_node(struct nes_cm_node * cm_node)1682 static int add_ref_cm_node(struct nes_cm_node *cm_node)
1683 {
1684 atomic_inc(&cm_node->ref_count);
1685 return 0;
1686 }
1687
1688
1689 /**
1690 * rem_ref_cm_node - destroy an instance of a cm node
1691 */
rem_ref_cm_node(struct nes_cm_core * cm_core,struct nes_cm_node * cm_node)1692 static int rem_ref_cm_node(struct nes_cm_core *cm_core,
1693 struct nes_cm_node *cm_node)
1694 {
1695 unsigned long flags;
1696 struct nes_qp *nesqp;
1697
1698 if (!cm_node)
1699 return -EINVAL;
1700
1701 spin_lock_irqsave(&cm_node->cm_core->ht_lock, flags);
1702 if (atomic_dec_return(&cm_node->ref_count)) {
1703 spin_unlock_irqrestore(&cm_node->cm_core->ht_lock, flags);
1704 return 0;
1705 }
1706 list_del(&cm_node->list);
1707 atomic_dec(&cm_core->ht_node_cnt);
1708 spin_unlock_irqrestore(&cm_node->cm_core->ht_lock, flags);
1709
1710 /* if the node is destroyed before connection was accelerated */
1711 if (!cm_node->accelerated && cm_node->accept_pend) {
1712 BUG_ON(!cm_node->listener);
1713 atomic_dec(&cm_node->listener->pend_accepts_cnt);
1714 BUG_ON(atomic_read(&cm_node->listener->pend_accepts_cnt) < 0);
1715 }
1716 WARN_ON(cm_node->send_entry);
1717 if (cm_node->recv_entry)
1718 handle_recv_entry(cm_node, 0);
1719 if (cm_node->listener) {
1720 mini_cm_dec_refcnt_listen(cm_core, cm_node->listener, 0);
1721 } else {
1722 if (cm_node->apbvt_set && cm_node->nesvnic) {
1723 nes_manage_apbvt(cm_node->nesvnic, cm_node->mapped_loc_port,
1724 PCI_FUNC(cm_node->nesvnic->nesdev->pcidev->devfn),
1725 NES_MANAGE_APBVT_DEL);
1726 }
1727 nes_debug(NES_DBG_NLMSG, "Delete APBVT mapped_loc_port = %04X\n",
1728 cm_node->mapped_loc_port);
1729 nes_remove_mapinfo(cm_node->loc_addr, cm_node->loc_port,
1730 cm_node->mapped_loc_addr, cm_node->mapped_loc_port);
1731 }
1732
1733 atomic_dec(&cm_core->node_cnt);
1734 atomic_inc(&cm_nodes_destroyed);
1735 nesqp = cm_node->nesqp;
1736 if (nesqp) {
1737 nesqp->cm_node = NULL;
1738 nes_rem_ref(&nesqp->ibqp);
1739 cm_node->nesqp = NULL;
1740 }
1741
1742 kfree(cm_node);
1743 return 0;
1744 }
1745
1746 /**
1747 * process_options
1748 */
process_options(struct nes_cm_node * cm_node,u8 * optionsloc,u32 optionsize,u32 syn_packet)1749 static int process_options(struct nes_cm_node *cm_node, u8 *optionsloc,
1750 u32 optionsize, u32 syn_packet)
1751 {
1752 u32 tmp;
1753 u32 offset = 0;
1754 union all_known_options *all_options;
1755 char got_mss_option = 0;
1756
1757 while (offset < optionsize) {
1758 all_options = (union all_known_options *)(optionsloc + offset);
1759 switch (all_options->as_base.optionnum) {
1760 case OPTION_NUMBER_END:
1761 offset = optionsize;
1762 break;
1763 case OPTION_NUMBER_NONE:
1764 offset += 1;
1765 continue;
1766 case OPTION_NUMBER_MSS:
1767 nes_debug(NES_DBG_CM, "%s: MSS Length: %d Offset: %d "
1768 "Size: %d\n", __func__,
1769 all_options->as_mss.length, offset, optionsize);
1770 got_mss_option = 1;
1771 if (all_options->as_mss.length != 4) {
1772 return 1;
1773 } else {
1774 tmp = ntohs(all_options->as_mss.mss);
1775 if (tmp > 0 && tmp <
1776 cm_node->tcp_cntxt.mss)
1777 cm_node->tcp_cntxt.mss = tmp;
1778 }
1779 break;
1780 case OPTION_NUMBER_WINDOW_SCALE:
1781 cm_node->tcp_cntxt.snd_wscale =
1782 all_options->as_windowscale.shiftcount;
1783 break;
1784 default:
1785 nes_debug(NES_DBG_CM, "TCP Option not understood: %x\n",
1786 all_options->as_base.optionnum);
1787 break;
1788 }
1789 offset += all_options->as_base.length;
1790 }
1791 if ((!got_mss_option) && (syn_packet))
1792 cm_node->tcp_cntxt.mss = NES_CM_DEFAULT_MSS;
1793 return 0;
1794 }
1795
drop_packet(struct sk_buff * skb)1796 static void drop_packet(struct sk_buff *skb)
1797 {
1798 atomic_inc(&cm_accel_dropped_pkts);
1799 dev_kfree_skb_any(skb);
1800 }
1801
handle_fin_pkt(struct nes_cm_node * cm_node)1802 static void handle_fin_pkt(struct nes_cm_node *cm_node)
1803 {
1804 nes_debug(NES_DBG_CM, "Received FIN, cm_node = %p, state = %u. "
1805 "refcnt=%d\n", cm_node, cm_node->state,
1806 atomic_read(&cm_node->ref_count));
1807 switch (cm_node->state) {
1808 case NES_CM_STATE_SYN_RCVD:
1809 case NES_CM_STATE_SYN_SENT:
1810 case NES_CM_STATE_ESTABLISHED:
1811 case NES_CM_STATE_MPAREJ_RCVD:
1812 cm_node->tcp_cntxt.rcv_nxt++;
1813 cleanup_retrans_entry(cm_node);
1814 cm_node->state = NES_CM_STATE_LAST_ACK;
1815 send_fin(cm_node, NULL);
1816 break;
1817 case NES_CM_STATE_MPAREQ_SENT:
1818 create_event(cm_node, NES_CM_EVENT_ABORTED);
1819 cm_node->tcp_cntxt.rcv_nxt++;
1820 cleanup_retrans_entry(cm_node);
1821 cm_node->state = NES_CM_STATE_CLOSED;
1822 add_ref_cm_node(cm_node);
1823 send_reset(cm_node, NULL);
1824 break;
1825 case NES_CM_STATE_FIN_WAIT1:
1826 cm_node->tcp_cntxt.rcv_nxt++;
1827 cleanup_retrans_entry(cm_node);
1828 cm_node->state = NES_CM_STATE_CLOSING;
1829 send_ack(cm_node, NULL);
1830 /* Wait for ACK as this is simultaneous close..
1831 * After we receive ACK, do not send anything..
1832 * Just rm the node.. Done.. */
1833 break;
1834 case NES_CM_STATE_FIN_WAIT2:
1835 cm_node->tcp_cntxt.rcv_nxt++;
1836 cleanup_retrans_entry(cm_node);
1837 cm_node->state = NES_CM_STATE_TIME_WAIT;
1838 send_ack(cm_node, NULL);
1839 schedule_nes_timer(cm_node, NULL, NES_TIMER_TYPE_CLOSE, 1, 0);
1840 break;
1841 case NES_CM_STATE_TIME_WAIT:
1842 cm_node->tcp_cntxt.rcv_nxt++;
1843 cleanup_retrans_entry(cm_node);
1844 cm_node->state = NES_CM_STATE_CLOSED;
1845 rem_ref_cm_node(cm_node->cm_core, cm_node);
1846 break;
1847 case NES_CM_STATE_TSA:
1848 default:
1849 nes_debug(NES_DBG_CM, "Error Rcvd FIN for node-%p state = %d\n",
1850 cm_node, cm_node->state);
1851 break;
1852 }
1853 }
1854
1855
handle_rst_pkt(struct nes_cm_node * cm_node,struct sk_buff * skb,struct tcphdr * tcph)1856 static void handle_rst_pkt(struct nes_cm_node *cm_node, struct sk_buff *skb,
1857 struct tcphdr *tcph)
1858 {
1859
1860 int reset = 0; /* whether to send reset in case of err.. */
1861 atomic_inc(&cm_resets_recvd);
1862 nes_debug(NES_DBG_CM, "Received Reset, cm_node = %p, state = %u."
1863 " refcnt=%d\n", cm_node, cm_node->state,
1864 atomic_read(&cm_node->ref_count));
1865 cleanup_retrans_entry(cm_node);
1866 switch (cm_node->state) {
1867 case NES_CM_STATE_SYN_SENT:
1868 case NES_CM_STATE_MPAREQ_SENT:
1869 nes_debug(NES_DBG_CM, "%s[%u] create abort for cm_node=%p "
1870 "listener=%p state=%d\n", __func__, __LINE__, cm_node,
1871 cm_node->listener, cm_node->state);
1872 switch (cm_node->mpa_frame_rev) {
1873 case IETF_MPA_V2:
1874 cm_node->mpa_frame_rev = IETF_MPA_V1;
1875 /* send a syn and goto syn sent state */
1876 cm_node->state = NES_CM_STATE_SYN_SENT;
1877 if (send_syn(cm_node, 0, NULL)) {
1878 active_open_err(cm_node, skb, reset);
1879 }
1880 break;
1881 case IETF_MPA_V1:
1882 default:
1883 active_open_err(cm_node, skb, reset);
1884 break;
1885 }
1886 break;
1887 case NES_CM_STATE_MPAREQ_RCVD:
1888 atomic_inc(&cm_node->passive_state);
1889 dev_kfree_skb_any(skb);
1890 break;
1891 case NES_CM_STATE_ESTABLISHED:
1892 case NES_CM_STATE_SYN_RCVD:
1893 case NES_CM_STATE_LISTENING:
1894 nes_debug(NES_DBG_CM, "Bad state %s[%u]\n", __func__, __LINE__);
1895 passive_open_err(cm_node, skb, reset);
1896 break;
1897 case NES_CM_STATE_TSA:
1898 active_open_err(cm_node, skb, reset);
1899 break;
1900 case NES_CM_STATE_CLOSED:
1901 drop_packet(skb);
1902 break;
1903 case NES_CM_STATE_FIN_WAIT2:
1904 case NES_CM_STATE_FIN_WAIT1:
1905 case NES_CM_STATE_LAST_ACK:
1906 cm_node->cm_id->rem_ref(cm_node->cm_id);
1907 case NES_CM_STATE_TIME_WAIT:
1908 cm_node->state = NES_CM_STATE_CLOSED;
1909 rem_ref_cm_node(cm_node->cm_core, cm_node);
1910 drop_packet(skb);
1911 break;
1912 default:
1913 drop_packet(skb);
1914 break;
1915 }
1916 }
1917
1918
handle_rcv_mpa(struct nes_cm_node * cm_node,struct sk_buff * skb)1919 static void handle_rcv_mpa(struct nes_cm_node *cm_node, struct sk_buff *skb)
1920 {
1921 int ret = 0;
1922 int datasize = skb->len;
1923 u8 *dataloc = skb->data;
1924
1925 enum nes_cm_event_type type = NES_CM_EVENT_UNKNOWN;
1926 u32 res_type;
1927
1928 ret = parse_mpa(cm_node, dataloc, &res_type, datasize);
1929 if (ret) {
1930 nes_debug(NES_DBG_CM, "didn't like MPA Request\n");
1931 if (cm_node->state == NES_CM_STATE_MPAREQ_SENT) {
1932 nes_debug(NES_DBG_CM, "%s[%u] create abort for "
1933 "cm_node=%p listener=%p state=%d\n", __func__,
1934 __LINE__, cm_node, cm_node->listener,
1935 cm_node->state);
1936 active_open_err(cm_node, skb, 1);
1937 } else {
1938 passive_open_err(cm_node, skb, 1);
1939 }
1940 return;
1941 }
1942
1943 switch (cm_node->state) {
1944 case NES_CM_STATE_ESTABLISHED:
1945 if (res_type == NES_MPA_REQUEST_REJECT)
1946 /*BIG problem as we are receiving the MPA.. So should
1947 * not be REJECT.. This is Passive Open.. We can
1948 * only receive it Reject for Active Open...*/
1949 WARN_ON(1);
1950 cm_node->state = NES_CM_STATE_MPAREQ_RCVD;
1951 type = NES_CM_EVENT_MPA_REQ;
1952 atomic_set(&cm_node->passive_state,
1953 NES_PASSIVE_STATE_INDICATED);
1954 break;
1955 case NES_CM_STATE_MPAREQ_SENT:
1956 cleanup_retrans_entry(cm_node);
1957 if (res_type == NES_MPA_REQUEST_REJECT) {
1958 type = NES_CM_EVENT_MPA_REJECT;
1959 cm_node->state = NES_CM_STATE_MPAREJ_RCVD;
1960 } else {
1961 type = NES_CM_EVENT_CONNECTED;
1962 cm_node->state = NES_CM_STATE_TSA;
1963 }
1964
1965 break;
1966 default:
1967 WARN_ON(1);
1968 break;
1969 }
1970 dev_kfree_skb_any(skb);
1971 create_event(cm_node, type);
1972 }
1973
indicate_pkt_err(struct nes_cm_node * cm_node,struct sk_buff * skb)1974 static void indicate_pkt_err(struct nes_cm_node *cm_node, struct sk_buff *skb)
1975 {
1976 switch (cm_node->state) {
1977 case NES_CM_STATE_SYN_SENT:
1978 case NES_CM_STATE_MPAREQ_SENT:
1979 nes_debug(NES_DBG_CM, "%s[%u] create abort for cm_node=%p "
1980 "listener=%p state=%d\n", __func__, __LINE__, cm_node,
1981 cm_node->listener, cm_node->state);
1982 active_open_err(cm_node, skb, 1);
1983 break;
1984 case NES_CM_STATE_ESTABLISHED:
1985 case NES_CM_STATE_SYN_RCVD:
1986 passive_open_err(cm_node, skb, 1);
1987 break;
1988 case NES_CM_STATE_TSA:
1989 default:
1990 drop_packet(skb);
1991 }
1992 }
1993
check_syn(struct nes_cm_node * cm_node,struct tcphdr * tcph,struct sk_buff * skb)1994 static int check_syn(struct nes_cm_node *cm_node, struct tcphdr *tcph,
1995 struct sk_buff *skb)
1996 {
1997 int err;
1998
1999 err = ((ntohl(tcph->ack_seq) == cm_node->tcp_cntxt.loc_seq_num)) ? 0 : 1;
2000 if (err)
2001 active_open_err(cm_node, skb, 1);
2002
2003 return err;
2004 }
2005
check_seq(struct nes_cm_node * cm_node,struct tcphdr * tcph,struct sk_buff * skb)2006 static int check_seq(struct nes_cm_node *cm_node, struct tcphdr *tcph,
2007 struct sk_buff *skb)
2008 {
2009 int err = 0;
2010 u32 seq;
2011 u32 ack_seq;
2012 u32 loc_seq_num = cm_node->tcp_cntxt.loc_seq_num;
2013 u32 rcv_nxt = cm_node->tcp_cntxt.rcv_nxt;
2014 u32 rcv_wnd;
2015
2016 seq = ntohl(tcph->seq);
2017 ack_seq = ntohl(tcph->ack_seq);
2018 rcv_wnd = cm_node->tcp_cntxt.rcv_wnd;
2019 if (ack_seq != loc_seq_num)
2020 err = 1;
2021 else if (!between(seq, rcv_nxt, (rcv_nxt + rcv_wnd)))
2022 err = 1;
2023 if (err) {
2024 nes_debug(NES_DBG_CM, "%s[%u] create abort for cm_node=%p "
2025 "listener=%p state=%d\n", __func__, __LINE__, cm_node,
2026 cm_node->listener, cm_node->state);
2027 indicate_pkt_err(cm_node, skb);
2028 nes_debug(NES_DBG_CM, "seq ERROR cm_node =%p seq=0x%08X "
2029 "rcv_nxt=0x%08X rcv_wnd=0x%x\n", cm_node, seq, rcv_nxt,
2030 rcv_wnd);
2031 }
2032 return err;
2033 }
2034
2035 /*
2036 * handle_syn_pkt() is for Passive node. The syn packet is received when a node
2037 * is created with a listener or it may comein as rexmitted packet which in
2038 * that case will be just dropped.
2039 */
handle_syn_pkt(struct nes_cm_node * cm_node,struct sk_buff * skb,struct tcphdr * tcph)2040 static void handle_syn_pkt(struct nes_cm_node *cm_node, struct sk_buff *skb,
2041 struct tcphdr *tcph)
2042 {
2043 int ret;
2044 u32 inc_sequence;
2045 int optionsize;
2046
2047 optionsize = (tcph->doff << 2) - sizeof(struct tcphdr);
2048 skb_trim(skb, 0);
2049 inc_sequence = ntohl(tcph->seq);
2050
2051 switch (cm_node->state) {
2052 case NES_CM_STATE_SYN_SENT:
2053 case NES_CM_STATE_MPAREQ_SENT:
2054 /* Rcvd syn on active open connection*/
2055 active_open_err(cm_node, skb, 1);
2056 break;
2057 case NES_CM_STATE_LISTENING:
2058 /* Passive OPEN */
2059 if (atomic_read(&cm_node->listener->pend_accepts_cnt) >
2060 cm_node->listener->backlog) {
2061 nes_debug(NES_DBG_CM, "drop syn due to backlog "
2062 "pressure \n");
2063 cm_backlog_drops++;
2064 passive_open_err(cm_node, skb, 0);
2065 break;
2066 }
2067 ret = handle_tcp_options(cm_node, tcph, skb, optionsize,
2068 1);
2069 if (ret) {
2070 passive_open_err(cm_node, skb, 0);
2071 /* drop pkt */
2072 break;
2073 }
2074 cm_node->tcp_cntxt.rcv_nxt = inc_sequence + 1;
2075 BUG_ON(cm_node->send_entry);
2076 cm_node->accept_pend = 1;
2077 atomic_inc(&cm_node->listener->pend_accepts_cnt);
2078
2079 cm_node->state = NES_CM_STATE_SYN_RCVD;
2080 send_syn(cm_node, 1, skb);
2081 break;
2082 case NES_CM_STATE_CLOSED:
2083 cleanup_retrans_entry(cm_node);
2084 add_ref_cm_node(cm_node);
2085 send_reset(cm_node, skb);
2086 break;
2087 case NES_CM_STATE_TSA:
2088 case NES_CM_STATE_ESTABLISHED:
2089 case NES_CM_STATE_FIN_WAIT1:
2090 case NES_CM_STATE_FIN_WAIT2:
2091 case NES_CM_STATE_MPAREQ_RCVD:
2092 case NES_CM_STATE_LAST_ACK:
2093 case NES_CM_STATE_CLOSING:
2094 case NES_CM_STATE_UNKNOWN:
2095 default:
2096 drop_packet(skb);
2097 break;
2098 }
2099 }
2100
handle_synack_pkt(struct nes_cm_node * cm_node,struct sk_buff * skb,struct tcphdr * tcph)2101 static void handle_synack_pkt(struct nes_cm_node *cm_node, struct sk_buff *skb,
2102 struct tcphdr *tcph)
2103 {
2104 int ret;
2105 u32 inc_sequence;
2106 int optionsize;
2107
2108 optionsize = (tcph->doff << 2) - sizeof(struct tcphdr);
2109 skb_trim(skb, 0);
2110 inc_sequence = ntohl(tcph->seq);
2111 switch (cm_node->state) {
2112 case NES_CM_STATE_SYN_SENT:
2113 cleanup_retrans_entry(cm_node);
2114 /* active open */
2115 if (check_syn(cm_node, tcph, skb))
2116 return;
2117 cm_node->tcp_cntxt.rem_ack_num = ntohl(tcph->ack_seq);
2118 /* setup options */
2119 ret = handle_tcp_options(cm_node, tcph, skb, optionsize, 0);
2120 if (ret) {
2121 nes_debug(NES_DBG_CM, "cm_node=%p tcp_options failed\n",
2122 cm_node);
2123 break;
2124 }
2125 cleanup_retrans_entry(cm_node);
2126 cm_node->tcp_cntxt.rcv_nxt = inc_sequence + 1;
2127 send_mpa_request(cm_node, skb);
2128 cm_node->state = NES_CM_STATE_MPAREQ_SENT;
2129 break;
2130 case NES_CM_STATE_MPAREQ_RCVD:
2131 /* passive open, so should not be here */
2132 passive_open_err(cm_node, skb, 1);
2133 break;
2134 case NES_CM_STATE_LISTENING:
2135 cm_node->tcp_cntxt.loc_seq_num = ntohl(tcph->ack_seq);
2136 cleanup_retrans_entry(cm_node);
2137 cm_node->state = NES_CM_STATE_CLOSED;
2138 send_reset(cm_node, skb);
2139 break;
2140 case NES_CM_STATE_CLOSED:
2141 cm_node->tcp_cntxt.loc_seq_num = ntohl(tcph->ack_seq);
2142 cleanup_retrans_entry(cm_node);
2143 add_ref_cm_node(cm_node);
2144 send_reset(cm_node, skb);
2145 break;
2146 case NES_CM_STATE_ESTABLISHED:
2147 case NES_CM_STATE_FIN_WAIT1:
2148 case NES_CM_STATE_FIN_WAIT2:
2149 case NES_CM_STATE_LAST_ACK:
2150 case NES_CM_STATE_TSA:
2151 case NES_CM_STATE_CLOSING:
2152 case NES_CM_STATE_UNKNOWN:
2153 case NES_CM_STATE_MPAREQ_SENT:
2154 default:
2155 drop_packet(skb);
2156 break;
2157 }
2158 }
2159
handle_ack_pkt(struct nes_cm_node * cm_node,struct sk_buff * skb,struct tcphdr * tcph)2160 static int handle_ack_pkt(struct nes_cm_node *cm_node, struct sk_buff *skb,
2161 struct tcphdr *tcph)
2162 {
2163 int datasize = 0;
2164 u32 inc_sequence;
2165 int ret = 0;
2166 int optionsize;
2167
2168 optionsize = (tcph->doff << 2) - sizeof(struct tcphdr);
2169
2170 if (check_seq(cm_node, tcph, skb))
2171 return -EINVAL;
2172
2173 skb_pull(skb, tcph->doff << 2);
2174 inc_sequence = ntohl(tcph->seq);
2175 datasize = skb->len;
2176 switch (cm_node->state) {
2177 case NES_CM_STATE_SYN_RCVD:
2178 /* Passive OPEN */
2179 cleanup_retrans_entry(cm_node);
2180 ret = handle_tcp_options(cm_node, tcph, skb, optionsize, 1);
2181 if (ret)
2182 break;
2183 cm_node->tcp_cntxt.rem_ack_num = ntohl(tcph->ack_seq);
2184 cm_node->state = NES_CM_STATE_ESTABLISHED;
2185 if (datasize) {
2186 cm_node->tcp_cntxt.rcv_nxt = inc_sequence + datasize;
2187 nes_get_remote_addr(cm_node);
2188 handle_rcv_mpa(cm_node, skb);
2189 } else { /* rcvd ACK only */
2190 dev_kfree_skb_any(skb);
2191 }
2192 break;
2193 case NES_CM_STATE_ESTABLISHED:
2194 /* Passive OPEN */
2195 cleanup_retrans_entry(cm_node);
2196 if (datasize) {
2197 cm_node->tcp_cntxt.rcv_nxt = inc_sequence + datasize;
2198 handle_rcv_mpa(cm_node, skb);
2199 } else {
2200 drop_packet(skb);
2201 }
2202 break;
2203 case NES_CM_STATE_MPAREQ_SENT:
2204 cm_node->tcp_cntxt.rem_ack_num = ntohl(tcph->ack_seq);
2205 if (datasize) {
2206 cm_node->tcp_cntxt.rcv_nxt = inc_sequence + datasize;
2207 handle_rcv_mpa(cm_node, skb);
2208 } else { /* Could be just an ack pkt.. */
2209 dev_kfree_skb_any(skb);
2210 }
2211 break;
2212 case NES_CM_STATE_LISTENING:
2213 cleanup_retrans_entry(cm_node);
2214 cm_node->state = NES_CM_STATE_CLOSED;
2215 send_reset(cm_node, skb);
2216 break;
2217 case NES_CM_STATE_CLOSED:
2218 cleanup_retrans_entry(cm_node);
2219 add_ref_cm_node(cm_node);
2220 send_reset(cm_node, skb);
2221 break;
2222 case NES_CM_STATE_LAST_ACK:
2223 case NES_CM_STATE_CLOSING:
2224 cleanup_retrans_entry(cm_node);
2225 cm_node->state = NES_CM_STATE_CLOSED;
2226 cm_node->cm_id->rem_ref(cm_node->cm_id);
2227 rem_ref_cm_node(cm_node->cm_core, cm_node);
2228 drop_packet(skb);
2229 break;
2230 case NES_CM_STATE_FIN_WAIT1:
2231 cleanup_retrans_entry(cm_node);
2232 drop_packet(skb);
2233 cm_node->state = NES_CM_STATE_FIN_WAIT2;
2234 break;
2235 case NES_CM_STATE_SYN_SENT:
2236 case NES_CM_STATE_FIN_WAIT2:
2237 case NES_CM_STATE_TSA:
2238 case NES_CM_STATE_MPAREQ_RCVD:
2239 case NES_CM_STATE_UNKNOWN:
2240 default:
2241 cleanup_retrans_entry(cm_node);
2242 drop_packet(skb);
2243 break;
2244 }
2245 return ret;
2246 }
2247
2248
2249
handle_tcp_options(struct nes_cm_node * cm_node,struct tcphdr * tcph,struct sk_buff * skb,int optionsize,int passive)2250 static int handle_tcp_options(struct nes_cm_node *cm_node, struct tcphdr *tcph,
2251 struct sk_buff *skb, int optionsize, int passive)
2252 {
2253 u8 *optionsloc = (u8 *)&tcph[1];
2254
2255 if (optionsize) {
2256 if (process_options(cm_node, optionsloc, optionsize,
2257 (u32)tcph->syn)) {
2258 nes_debug(NES_DBG_CM, "%s: Node %p, Sending RESET\n",
2259 __func__, cm_node);
2260 if (passive)
2261 passive_open_err(cm_node, skb, 1);
2262 else
2263 active_open_err(cm_node, skb, 1);
2264 return 1;
2265 }
2266 }
2267
2268 cm_node->tcp_cntxt.snd_wnd = ntohs(tcph->window) <<
2269 cm_node->tcp_cntxt.snd_wscale;
2270
2271 if (cm_node->tcp_cntxt.snd_wnd > cm_node->tcp_cntxt.max_snd_wnd)
2272 cm_node->tcp_cntxt.max_snd_wnd = cm_node->tcp_cntxt.snd_wnd;
2273 return 0;
2274 }
2275
2276 /*
2277 * active_open_err() will send reset() if flag set..
2278 * It will also send ABORT event.
2279 */
active_open_err(struct nes_cm_node * cm_node,struct sk_buff * skb,int reset)2280 static void active_open_err(struct nes_cm_node *cm_node, struct sk_buff *skb,
2281 int reset)
2282 {
2283 cleanup_retrans_entry(cm_node);
2284 if (reset) {
2285 nes_debug(NES_DBG_CM, "ERROR active err called for cm_node=%p, "
2286 "state=%d\n", cm_node, cm_node->state);
2287 add_ref_cm_node(cm_node);
2288 send_reset(cm_node, skb);
2289 } else {
2290 dev_kfree_skb_any(skb);
2291 }
2292
2293 cm_node->state = NES_CM_STATE_CLOSED;
2294 create_event(cm_node, NES_CM_EVENT_ABORTED);
2295 }
2296
2297 /*
2298 * passive_open_err() will either do a reset() or will free up the skb and
2299 * remove the cm_node.
2300 */
passive_open_err(struct nes_cm_node * cm_node,struct sk_buff * skb,int reset)2301 static void passive_open_err(struct nes_cm_node *cm_node, struct sk_buff *skb,
2302 int reset)
2303 {
2304 cleanup_retrans_entry(cm_node);
2305 cm_node->state = NES_CM_STATE_CLOSED;
2306 if (reset) {
2307 nes_debug(NES_DBG_CM, "passive_open_err sending RST for "
2308 "cm_node=%p state =%d\n", cm_node, cm_node->state);
2309 send_reset(cm_node, skb);
2310 } else {
2311 dev_kfree_skb_any(skb);
2312 rem_ref_cm_node(cm_node->cm_core, cm_node);
2313 }
2314 }
2315
2316 /*
2317 * free_retrans_entry() routines assumes that the retrans_list_lock has
2318 * been acquired before calling.
2319 */
free_retrans_entry(struct nes_cm_node * cm_node)2320 static void free_retrans_entry(struct nes_cm_node *cm_node)
2321 {
2322 struct nes_timer_entry *send_entry;
2323
2324 send_entry = cm_node->send_entry;
2325 if (send_entry) {
2326 cm_node->send_entry = NULL;
2327 dev_kfree_skb_any(send_entry->skb);
2328 kfree(send_entry);
2329 rem_ref_cm_node(cm_node->cm_core, cm_node);
2330 }
2331 }
2332
cleanup_retrans_entry(struct nes_cm_node * cm_node)2333 static void cleanup_retrans_entry(struct nes_cm_node *cm_node)
2334 {
2335 unsigned long flags;
2336
2337 spin_lock_irqsave(&cm_node->retrans_list_lock, flags);
2338 free_retrans_entry(cm_node);
2339 spin_unlock_irqrestore(&cm_node->retrans_list_lock, flags);
2340 }
2341
2342 /**
2343 * process_packet
2344 * Returns skb if to be freed, else it will return NULL if already used..
2345 */
process_packet(struct nes_cm_node * cm_node,struct sk_buff * skb,struct nes_cm_core * cm_core)2346 static void process_packet(struct nes_cm_node *cm_node, struct sk_buff *skb,
2347 struct nes_cm_core *cm_core)
2348 {
2349 enum nes_tcpip_pkt_type pkt_type = NES_PKT_TYPE_UNKNOWN;
2350 struct tcphdr *tcph = tcp_hdr(skb);
2351 u32 fin_set = 0;
2352 int ret = 0;
2353
2354 skb_pull(skb, ip_hdr(skb)->ihl << 2);
2355
2356 nes_debug(NES_DBG_CM, "process_packet: cm_node=%p state =%d syn=%d "
2357 "ack=%d rst=%d fin=%d\n", cm_node, cm_node->state, tcph->syn,
2358 tcph->ack, tcph->rst, tcph->fin);
2359
2360 if (tcph->rst) {
2361 pkt_type = NES_PKT_TYPE_RST;
2362 } else if (tcph->syn) {
2363 pkt_type = NES_PKT_TYPE_SYN;
2364 if (tcph->ack)
2365 pkt_type = NES_PKT_TYPE_SYNACK;
2366 } else if (tcph->ack) {
2367 pkt_type = NES_PKT_TYPE_ACK;
2368 }
2369 if (tcph->fin)
2370 fin_set = 1;
2371
2372 switch (pkt_type) {
2373 case NES_PKT_TYPE_SYN:
2374 handle_syn_pkt(cm_node, skb, tcph);
2375 break;
2376 case NES_PKT_TYPE_SYNACK:
2377 handle_synack_pkt(cm_node, skb, tcph);
2378 break;
2379 case NES_PKT_TYPE_ACK:
2380 ret = handle_ack_pkt(cm_node, skb, tcph);
2381 if (fin_set && !ret)
2382 handle_fin_pkt(cm_node);
2383 break;
2384 case NES_PKT_TYPE_RST:
2385 handle_rst_pkt(cm_node, skb, tcph);
2386 break;
2387 default:
2388 if ((fin_set) && (!check_seq(cm_node, tcph, skb)))
2389 handle_fin_pkt(cm_node);
2390 drop_packet(skb);
2391 break;
2392 }
2393 }
2394
2395 /**
2396 * mini_cm_listen - create a listen node with params
2397 */
mini_cm_listen(struct nes_cm_core * cm_core,struct nes_vnic * nesvnic,struct nes_cm_info * cm_info)2398 static struct nes_cm_listener *mini_cm_listen(struct nes_cm_core *cm_core,
2399 struct nes_vnic *nesvnic, struct nes_cm_info *cm_info)
2400 {
2401 struct nes_cm_listener *listener;
2402 struct iwpm_dev_data pm_reg_msg;
2403 struct iwpm_sa_data pm_msg;
2404 unsigned long flags;
2405 int iwpm_err = 0;
2406
2407 nes_debug(NES_DBG_CM, "Search for 0x%08x : 0x%04x\n",
2408 cm_info->loc_addr, cm_info->loc_port);
2409
2410 /* cannot have multiple matching listeners */
2411 listener = find_listener(cm_core, cm_info->loc_addr, cm_info->loc_port,
2412 NES_CM_LISTENER_EITHER_STATE, 1);
2413
2414 if (listener && listener->listener_state == NES_CM_LISTENER_ACTIVE_STATE) {
2415 /* find automatically incs ref count ??? */
2416 atomic_dec(&listener->ref_count);
2417 nes_debug(NES_DBG_CM, "Not creating listener since it already exists\n");
2418 return NULL;
2419 }
2420
2421 if (!listener) {
2422 nes_form_reg_msg(nesvnic, &pm_reg_msg);
2423 iwpm_err = iwpm_register_pid(&pm_reg_msg, RDMA_NL_NES);
2424 if (iwpm_err) {
2425 nes_debug(NES_DBG_NLMSG,
2426 "Port Mapper reg pid fail (err = %d).\n", iwpm_err);
2427 }
2428 if (iwpm_valid_pid() && !iwpm_err) {
2429 nes_form_pm_msg(cm_info, &pm_msg);
2430 iwpm_err = iwpm_add_mapping(&pm_msg, RDMA_NL_NES);
2431 if (iwpm_err)
2432 nes_debug(NES_DBG_NLMSG,
2433 "Port Mapper query fail (err = %d).\n", iwpm_err);
2434 else
2435 nes_record_pm_msg(cm_info, &pm_msg);
2436 }
2437
2438 /* create a CM listen node (1/2 node to compare incoming traffic to) */
2439 listener = kzalloc(sizeof(*listener), GFP_ATOMIC);
2440 if (!listener) {
2441 nes_debug(NES_DBG_CM, "Not creating listener memory allocation failed\n");
2442 return NULL;
2443 }
2444
2445 listener->loc_addr = cm_info->loc_addr;
2446 listener->loc_port = cm_info->loc_port;
2447 listener->mapped_loc_addr = cm_info->mapped_loc_addr;
2448 listener->mapped_loc_port = cm_info->mapped_loc_port;
2449 listener->reused_node = 0;
2450
2451 atomic_set(&listener->ref_count, 1);
2452 }
2453 /* pasive case */
2454 /* find already inc'ed the ref count */
2455 else {
2456 listener->reused_node = 1;
2457 }
2458
2459 listener->cm_id = cm_info->cm_id;
2460 atomic_set(&listener->pend_accepts_cnt, 0);
2461 listener->cm_core = cm_core;
2462 listener->nesvnic = nesvnic;
2463 atomic_inc(&cm_core->node_cnt);
2464
2465 listener->conn_type = cm_info->conn_type;
2466 listener->backlog = cm_info->backlog;
2467 listener->listener_state = NES_CM_LISTENER_ACTIVE_STATE;
2468
2469 if (!listener->reused_node) {
2470 spin_lock_irqsave(&cm_core->listen_list_lock, flags);
2471 list_add(&listener->list, &cm_core->listen_list.list);
2472 spin_unlock_irqrestore(&cm_core->listen_list_lock, flags);
2473 atomic_inc(&cm_core->listen_node_cnt);
2474 }
2475
2476 nes_debug(NES_DBG_CM, "Api - listen(): addr=0x%08X, port=0x%04x,"
2477 " listener = %p, backlog = %d, cm_id = %p.\n",
2478 cm_info->loc_addr, cm_info->loc_port,
2479 listener, listener->backlog, listener->cm_id);
2480
2481 return listener;
2482 }
2483
2484
2485 /**
2486 * mini_cm_connect - make a connection node with params
2487 */
mini_cm_connect(struct nes_cm_core * cm_core,struct nes_vnic * nesvnic,u16 private_data_len,void * private_data,struct nes_cm_info * cm_info)2488 static struct nes_cm_node *mini_cm_connect(struct nes_cm_core *cm_core,
2489 struct nes_vnic *nesvnic, u16 private_data_len,
2490 void *private_data, struct nes_cm_info *cm_info)
2491 {
2492 int ret = 0;
2493 struct nes_cm_node *cm_node;
2494 struct nes_cm_listener *loopbackremotelistener;
2495 struct nes_cm_node *loopbackremotenode;
2496 struct nes_cm_info loopback_cm_info;
2497 u8 *start_buff;
2498
2499 /* create a CM connection node */
2500 cm_node = make_cm_node(cm_core, nesvnic, cm_info, NULL);
2501 if (!cm_node)
2502 return NULL;
2503
2504 /* set our node side to client (active) side */
2505 cm_node->tcp_cntxt.client = 1;
2506 cm_node->tcp_cntxt.rcv_wscale = NES_CM_DEFAULT_RCV_WND_SCALE;
2507
2508 if (cm_info->loc_addr == cm_info->rem_addr) {
2509 loopbackremotelistener = find_listener(cm_core,
2510 cm_node->mapped_loc_addr, cm_node->mapped_rem_port,
2511 NES_CM_LISTENER_ACTIVE_STATE, 0);
2512 if (loopbackremotelistener == NULL) {
2513 create_event(cm_node, NES_CM_EVENT_ABORTED);
2514 } else {
2515 loopback_cm_info = *cm_info;
2516 loopback_cm_info.loc_port = cm_info->rem_port;
2517 loopback_cm_info.rem_port = cm_info->loc_port;
2518 loopback_cm_info.mapped_loc_port =
2519 cm_info->mapped_rem_port;
2520 loopback_cm_info.mapped_rem_port =
2521 cm_info->mapped_loc_port;
2522 loopback_cm_info.cm_id = loopbackremotelistener->cm_id;
2523 loopbackremotenode = make_cm_node(cm_core, nesvnic,
2524 &loopback_cm_info, loopbackremotelistener);
2525 if (!loopbackremotenode) {
2526 rem_ref_cm_node(cm_node->cm_core, cm_node);
2527 return NULL;
2528 }
2529 atomic_inc(&cm_loopbacks);
2530 loopbackremotenode->loopbackpartner = cm_node;
2531 loopbackremotenode->tcp_cntxt.rcv_wscale =
2532 NES_CM_DEFAULT_RCV_WND_SCALE;
2533 cm_node->loopbackpartner = loopbackremotenode;
2534 memcpy(loopbackremotenode->mpa_frame_buf, private_data,
2535 private_data_len);
2536 loopbackremotenode->mpa_frame_size = private_data_len;
2537
2538 /* we are done handling this state. */
2539 /* set node to a TSA state */
2540 cm_node->state = NES_CM_STATE_TSA;
2541 cm_node->tcp_cntxt.rcv_nxt =
2542 loopbackremotenode->tcp_cntxt.loc_seq_num;
2543 loopbackremotenode->tcp_cntxt.rcv_nxt =
2544 cm_node->tcp_cntxt.loc_seq_num;
2545 cm_node->tcp_cntxt.max_snd_wnd =
2546 loopbackremotenode->tcp_cntxt.rcv_wnd;
2547 loopbackremotenode->tcp_cntxt.max_snd_wnd =
2548 cm_node->tcp_cntxt.rcv_wnd;
2549 cm_node->tcp_cntxt.snd_wnd =
2550 loopbackremotenode->tcp_cntxt.rcv_wnd;
2551 loopbackremotenode->tcp_cntxt.snd_wnd =
2552 cm_node->tcp_cntxt.rcv_wnd;
2553 cm_node->tcp_cntxt.snd_wscale =
2554 loopbackremotenode->tcp_cntxt.rcv_wscale;
2555 loopbackremotenode->tcp_cntxt.snd_wscale =
2556 cm_node->tcp_cntxt.rcv_wscale;
2557 loopbackremotenode->state = NES_CM_STATE_MPAREQ_RCVD;
2558 create_event(loopbackremotenode, NES_CM_EVENT_MPA_REQ);
2559 }
2560 return cm_node;
2561 }
2562
2563 start_buff = &cm_node->mpa_frame_buf[0] + sizeof(struct ietf_mpa_v2);
2564 cm_node->mpa_frame_size = private_data_len;
2565
2566 memcpy(start_buff, private_data, private_data_len);
2567
2568 /* send a syn and goto syn sent state */
2569 cm_node->state = NES_CM_STATE_SYN_SENT;
2570 ret = send_syn(cm_node, 0, NULL);
2571
2572 if (ret) {
2573 /* error in sending the syn free up the cm_node struct */
2574 nes_debug(NES_DBG_CM, "Api - connect() FAILED: dest "
2575 "addr=0x%08X, port=0x%04x, cm_node=%p, cm_id = %p.\n",
2576 cm_node->rem_addr, cm_node->rem_port, cm_node,
2577 cm_node->cm_id);
2578 rem_ref_cm_node(cm_node->cm_core, cm_node);
2579 cm_node = NULL;
2580 }
2581
2582 if (cm_node) {
2583 nes_debug(NES_DBG_CM, "Api - connect(): dest addr=0x%08X,"
2584 "port=0x%04x, cm_node=%p, cm_id = %p.\n",
2585 cm_node->rem_addr, cm_node->rem_port, cm_node,
2586 cm_node->cm_id);
2587 }
2588
2589 return cm_node;
2590 }
2591
2592
2593 /**
2594 * mini_cm_accept - accept a connection
2595 * This function is never called
2596 */
mini_cm_accept(struct nes_cm_core * cm_core,struct nes_cm_node * cm_node)2597 static int mini_cm_accept(struct nes_cm_core *cm_core, struct nes_cm_node *cm_node)
2598 {
2599 return 0;
2600 }
2601
2602
2603 /**
2604 * mini_cm_reject - reject and teardown a connection
2605 */
mini_cm_reject(struct nes_cm_core * cm_core,struct nes_cm_node * cm_node)2606 static int mini_cm_reject(struct nes_cm_core *cm_core, struct nes_cm_node *cm_node)
2607 {
2608 int ret = 0;
2609 int err = 0;
2610 int passive_state;
2611 struct nes_cm_event event;
2612 struct iw_cm_id *cm_id = cm_node->cm_id;
2613 struct nes_cm_node *loopback = cm_node->loopbackpartner;
2614
2615 nes_debug(NES_DBG_CM, "%s cm_node=%p type=%d state=%d\n",
2616 __func__, cm_node, cm_node->tcp_cntxt.client, cm_node->state);
2617
2618 if (cm_node->tcp_cntxt.client)
2619 return ret;
2620 cleanup_retrans_entry(cm_node);
2621
2622 if (!loopback) {
2623 passive_state = atomic_add_return(1, &cm_node->passive_state);
2624 if (passive_state == NES_SEND_RESET_EVENT) {
2625 cm_node->state = NES_CM_STATE_CLOSED;
2626 rem_ref_cm_node(cm_core, cm_node);
2627 } else {
2628 if (cm_node->state == NES_CM_STATE_LISTENER_DESTROYED) {
2629 rem_ref_cm_node(cm_core, cm_node);
2630 } else {
2631 ret = send_mpa_reject(cm_node);
2632 if (ret) {
2633 cm_node->state = NES_CM_STATE_CLOSED;
2634 err = send_reset(cm_node, NULL);
2635 if (err)
2636 WARN_ON(1);
2637 } else {
2638 cm_id->add_ref(cm_id);
2639 }
2640 }
2641 }
2642 } else {
2643 cm_node->cm_id = NULL;
2644 if (cm_node->state == NES_CM_STATE_LISTENER_DESTROYED) {
2645 rem_ref_cm_node(cm_core, cm_node);
2646 rem_ref_cm_node(cm_core, loopback);
2647 } else {
2648 event.cm_node = loopback;
2649 event.cm_info.rem_addr = loopback->rem_addr;
2650 event.cm_info.loc_addr = loopback->loc_addr;
2651 event.cm_info.rem_port = loopback->rem_port;
2652 event.cm_info.loc_port = loopback->loc_port;
2653 event.cm_info.cm_id = loopback->cm_id;
2654 cm_event_mpa_reject(&event);
2655 rem_ref_cm_node(cm_core, cm_node);
2656 loopback->state = NES_CM_STATE_CLOSING;
2657
2658 cm_id = loopback->cm_id;
2659 rem_ref_cm_node(cm_core, loopback);
2660 cm_id->rem_ref(cm_id);
2661 }
2662 }
2663
2664 return ret;
2665 }
2666
2667
2668 /**
2669 * mini_cm_close
2670 */
mini_cm_close(struct nes_cm_core * cm_core,struct nes_cm_node * cm_node)2671 static int mini_cm_close(struct nes_cm_core *cm_core, struct nes_cm_node *cm_node)
2672 {
2673 int ret = 0;
2674
2675 if (!cm_core || !cm_node)
2676 return -EINVAL;
2677
2678 switch (cm_node->state) {
2679 case NES_CM_STATE_SYN_RCVD:
2680 case NES_CM_STATE_SYN_SENT:
2681 case NES_CM_STATE_ONE_SIDE_ESTABLISHED:
2682 case NES_CM_STATE_ESTABLISHED:
2683 case NES_CM_STATE_ACCEPTING:
2684 case NES_CM_STATE_MPAREQ_SENT:
2685 case NES_CM_STATE_MPAREQ_RCVD:
2686 cleanup_retrans_entry(cm_node);
2687 send_reset(cm_node, NULL);
2688 break;
2689 case NES_CM_STATE_CLOSE_WAIT:
2690 cm_node->state = NES_CM_STATE_LAST_ACK;
2691 send_fin(cm_node, NULL);
2692 break;
2693 case NES_CM_STATE_FIN_WAIT1:
2694 case NES_CM_STATE_FIN_WAIT2:
2695 case NES_CM_STATE_LAST_ACK:
2696 case NES_CM_STATE_TIME_WAIT:
2697 case NES_CM_STATE_CLOSING:
2698 ret = -1;
2699 break;
2700 case NES_CM_STATE_LISTENING:
2701 cleanup_retrans_entry(cm_node);
2702 send_reset(cm_node, NULL);
2703 break;
2704 case NES_CM_STATE_MPAREJ_RCVD:
2705 case NES_CM_STATE_UNKNOWN:
2706 case NES_CM_STATE_INITED:
2707 case NES_CM_STATE_CLOSED:
2708 case NES_CM_STATE_LISTENER_DESTROYED:
2709 ret = rem_ref_cm_node(cm_core, cm_node);
2710 break;
2711 case NES_CM_STATE_TSA:
2712 if (cm_node->send_entry)
2713 printk(KERN_ERR "ERROR Close got called from STATE_TSA "
2714 "send_entry=%p\n", cm_node->send_entry);
2715 ret = rem_ref_cm_node(cm_core, cm_node);
2716 break;
2717 }
2718 return ret;
2719 }
2720
2721
2722 /**
2723 * recv_pkt - recv an ETHERNET packet, and process it through CM
2724 * node state machine
2725 */
mini_cm_recv_pkt(struct nes_cm_core * cm_core,struct nes_vnic * nesvnic,struct sk_buff * skb)2726 static int mini_cm_recv_pkt(struct nes_cm_core *cm_core,
2727 struct nes_vnic *nesvnic, struct sk_buff *skb)
2728 {
2729 struct nes_cm_node *cm_node = NULL;
2730 struct nes_cm_listener *listener = NULL;
2731 struct iphdr *iph;
2732 struct tcphdr *tcph;
2733 struct nes_cm_info nfo;
2734 int skb_handled = 1;
2735 __be32 tmp_daddr, tmp_saddr;
2736
2737 if (!skb)
2738 return 0;
2739 if (skb->len < sizeof(struct iphdr) + sizeof(struct tcphdr))
2740 return 0;
2741
2742 iph = (struct iphdr *)skb->data;
2743 tcph = (struct tcphdr *)(skb->data + sizeof(struct iphdr));
2744
2745 nfo.loc_addr = ntohl(iph->daddr);
2746 nfo.loc_port = ntohs(tcph->dest);
2747 nfo.rem_addr = ntohl(iph->saddr);
2748 nfo.rem_port = ntohs(tcph->source);
2749
2750 /* If port mapper is available these should be mapped address info */
2751 nfo.mapped_loc_addr = ntohl(iph->daddr);
2752 nfo.mapped_loc_port = ntohs(tcph->dest);
2753 nfo.mapped_rem_addr = ntohl(iph->saddr);
2754 nfo.mapped_rem_port = ntohs(tcph->source);
2755
2756 tmp_daddr = cpu_to_be32(iph->daddr);
2757 tmp_saddr = cpu_to_be32(iph->saddr);
2758
2759 nes_debug(NES_DBG_CM, "Received packet: dest=%pI4:0x%04X src=%pI4:0x%04X\n",
2760 &tmp_daddr, tcph->dest, &tmp_saddr, tcph->source);
2761
2762 do {
2763 cm_node = find_node(cm_core,
2764 nfo.mapped_rem_port, nfo.mapped_rem_addr,
2765 nfo.mapped_loc_port, nfo.mapped_loc_addr);
2766
2767 if (!cm_node) {
2768 /* Only type of packet accepted are for */
2769 /* the PASSIVE open (syn only) */
2770 if ((!tcph->syn) || (tcph->ack)) {
2771 skb_handled = 0;
2772 break;
2773 }
2774 listener = find_listener(cm_core, nfo.mapped_loc_addr,
2775 nfo.mapped_loc_port,
2776 NES_CM_LISTENER_ACTIVE_STATE, 0);
2777 if (!listener) {
2778 nfo.cm_id = NULL;
2779 nfo.conn_type = 0;
2780 nes_debug(NES_DBG_CM, "Unable to find listener for the pkt\n");
2781 skb_handled = 0;
2782 break;
2783 }
2784 nfo.cm_id = listener->cm_id;
2785 nfo.conn_type = listener->conn_type;
2786 cm_node = make_cm_node(cm_core, nesvnic, &nfo,
2787 listener);
2788 if (!cm_node) {
2789 nes_debug(NES_DBG_CM, "Unable to allocate "
2790 "node\n");
2791 cm_packets_dropped++;
2792 atomic_dec(&listener->ref_count);
2793 dev_kfree_skb_any(skb);
2794 break;
2795 }
2796 if (!tcph->rst && !tcph->fin) {
2797 cm_node->state = NES_CM_STATE_LISTENING;
2798 } else {
2799 cm_packets_dropped++;
2800 rem_ref_cm_node(cm_core, cm_node);
2801 dev_kfree_skb_any(skb);
2802 break;
2803 }
2804 add_ref_cm_node(cm_node);
2805 } else if (cm_node->state == NES_CM_STATE_TSA) {
2806 if (cm_node->nesqp->pau_mode)
2807 nes_queue_mgt_skbs(skb, nesvnic, cm_node->nesqp);
2808 else {
2809 rem_ref_cm_node(cm_core, cm_node);
2810 atomic_inc(&cm_accel_dropped_pkts);
2811 dev_kfree_skb_any(skb);
2812 }
2813 break;
2814 }
2815 skb_reset_network_header(skb);
2816 skb_set_transport_header(skb, sizeof(*tcph));
2817 skb->len = ntohs(iph->tot_len);
2818 process_packet(cm_node, skb, cm_core);
2819 rem_ref_cm_node(cm_core, cm_node);
2820 } while (0);
2821 return skb_handled;
2822 }
2823
2824
2825 /**
2826 * nes_cm_alloc_core - allocate a top level instance of a cm core
2827 */
nes_cm_alloc_core(void)2828 static struct nes_cm_core *nes_cm_alloc_core(void)
2829 {
2830 struct nes_cm_core *cm_core;
2831
2832 /* setup the CM core */
2833 /* alloc top level core control structure */
2834 cm_core = kzalloc(sizeof(*cm_core), GFP_KERNEL);
2835 if (!cm_core)
2836 return NULL;
2837
2838 INIT_LIST_HEAD(&cm_core->connected_nodes);
2839 init_timer(&cm_core->tcp_timer);
2840 cm_core->tcp_timer.function = nes_cm_timer_tick;
2841
2842 cm_core->mtu = NES_CM_DEFAULT_MTU;
2843 cm_core->state = NES_CM_STATE_INITED;
2844 cm_core->free_tx_pkt_max = NES_CM_DEFAULT_FREE_PKTS;
2845
2846 atomic_set(&cm_core->events_posted, 0);
2847
2848 cm_core->api = &nes_cm_api;
2849
2850 spin_lock_init(&cm_core->ht_lock);
2851 spin_lock_init(&cm_core->listen_list_lock);
2852
2853 INIT_LIST_HEAD(&cm_core->listen_list.list);
2854
2855 nes_debug(NES_DBG_CM, "Init CM Core completed -- cm_core=%p\n", cm_core);
2856
2857 nes_debug(NES_DBG_CM, "Enable QUEUE EVENTS\n");
2858 cm_core->event_wq = create_singlethread_workqueue("nesewq");
2859 cm_core->post_event = nes_cm_post_event;
2860 nes_debug(NES_DBG_CM, "Enable QUEUE DISCONNECTS\n");
2861 cm_core->disconn_wq = create_singlethread_workqueue("nesdwq");
2862
2863 print_core(cm_core);
2864 return cm_core;
2865 }
2866
2867
2868 /**
2869 * mini_cm_dealloc_core - deallocate a top level instance of a cm core
2870 */
mini_cm_dealloc_core(struct nes_cm_core * cm_core)2871 static int mini_cm_dealloc_core(struct nes_cm_core *cm_core)
2872 {
2873 nes_debug(NES_DBG_CM, "De-Alloc CM Core (%p)\n", cm_core);
2874
2875 if (!cm_core)
2876 return -EINVAL;
2877
2878 barrier();
2879
2880 if (timer_pending(&cm_core->tcp_timer))
2881 del_timer(&cm_core->tcp_timer);
2882
2883 destroy_workqueue(cm_core->event_wq);
2884 destroy_workqueue(cm_core->disconn_wq);
2885 nes_debug(NES_DBG_CM, "\n");
2886 kfree(cm_core);
2887
2888 return 0;
2889 }
2890
2891
2892 /**
2893 * mini_cm_get
2894 */
mini_cm_get(struct nes_cm_core * cm_core)2895 static int mini_cm_get(struct nes_cm_core *cm_core)
2896 {
2897 return cm_core->state;
2898 }
2899
2900
2901 /**
2902 * mini_cm_set
2903 */
mini_cm_set(struct nes_cm_core * cm_core,u32 type,u32 value)2904 static int mini_cm_set(struct nes_cm_core *cm_core, u32 type, u32 value)
2905 {
2906 int ret = 0;
2907
2908 switch (type) {
2909 case NES_CM_SET_PKT_SIZE:
2910 cm_core->mtu = value;
2911 break;
2912 case NES_CM_SET_FREE_PKT_Q_SIZE:
2913 cm_core->free_tx_pkt_max = value;
2914 break;
2915 default:
2916 /* unknown set option */
2917 ret = -EINVAL;
2918 }
2919
2920 return ret;
2921 }
2922
2923
2924 /**
2925 * nes_cm_init_tsa_conn setup HW; MPA frames must be
2926 * successfully exchanged when this is called
2927 */
nes_cm_init_tsa_conn(struct nes_qp * nesqp,struct nes_cm_node * cm_node)2928 static int nes_cm_init_tsa_conn(struct nes_qp *nesqp, struct nes_cm_node *cm_node)
2929 {
2930 int ret = 0;
2931
2932 if (!nesqp)
2933 return -EINVAL;
2934
2935 nesqp->nesqp_context->misc |= cpu_to_le32(NES_QPCONTEXT_MISC_IPV4 |
2936 NES_QPCONTEXT_MISC_NO_NAGLE | NES_QPCONTEXT_MISC_DO_NOT_FRAG |
2937 NES_QPCONTEXT_MISC_DROS);
2938
2939 if (cm_node->tcp_cntxt.snd_wscale || cm_node->tcp_cntxt.rcv_wscale)
2940 nesqp->nesqp_context->misc |= cpu_to_le32(NES_QPCONTEXT_MISC_WSCALE);
2941
2942 nesqp->nesqp_context->misc2 |= cpu_to_le32(64 << NES_QPCONTEXT_MISC2_TTL_SHIFT);
2943
2944 nesqp->nesqp_context->misc2 |= cpu_to_le32(
2945 cm_node->tos << NES_QPCONTEXT_MISC2_TOS_SHIFT);
2946
2947 nesqp->nesqp_context->mss |= cpu_to_le32(((u32)cm_node->tcp_cntxt.mss) << 16);
2948
2949 nesqp->nesqp_context->tcp_state_flow_label |= cpu_to_le32(
2950 (u32)NES_QPCONTEXT_TCPSTATE_EST << NES_QPCONTEXT_TCPFLOW_TCP_STATE_SHIFT);
2951
2952 nesqp->nesqp_context->pd_index_wscale |= cpu_to_le32(
2953 (cm_node->tcp_cntxt.snd_wscale << NES_QPCONTEXT_PDWSCALE_SND_WSCALE_SHIFT) &
2954 NES_QPCONTEXT_PDWSCALE_SND_WSCALE_MASK);
2955
2956 nesqp->nesqp_context->pd_index_wscale |= cpu_to_le32(
2957 (cm_node->tcp_cntxt.rcv_wscale << NES_QPCONTEXT_PDWSCALE_RCV_WSCALE_SHIFT) &
2958 NES_QPCONTEXT_PDWSCALE_RCV_WSCALE_MASK);
2959
2960 nesqp->nesqp_context->keepalive = cpu_to_le32(0x80);
2961 nesqp->nesqp_context->ts_recent = 0;
2962 nesqp->nesqp_context->ts_age = 0;
2963 nesqp->nesqp_context->snd_nxt = cpu_to_le32(cm_node->tcp_cntxt.loc_seq_num);
2964 nesqp->nesqp_context->snd_wnd = cpu_to_le32(cm_node->tcp_cntxt.snd_wnd);
2965 nesqp->nesqp_context->rcv_nxt = cpu_to_le32(cm_node->tcp_cntxt.rcv_nxt);
2966 nesqp->nesqp_context->rcv_wnd = cpu_to_le32(cm_node->tcp_cntxt.rcv_wnd <<
2967 cm_node->tcp_cntxt.rcv_wscale);
2968 nesqp->nesqp_context->snd_max = cpu_to_le32(cm_node->tcp_cntxt.loc_seq_num);
2969 nesqp->nesqp_context->snd_una = cpu_to_le32(cm_node->tcp_cntxt.loc_seq_num);
2970 nesqp->nesqp_context->srtt = 0;
2971 nesqp->nesqp_context->rttvar = cpu_to_le32(0x6);
2972 nesqp->nesqp_context->ssthresh = cpu_to_le32(0x3FFFC000);
2973 nesqp->nesqp_context->cwnd = cpu_to_le32(2 * cm_node->tcp_cntxt.mss);
2974 nesqp->nesqp_context->snd_wl1 = cpu_to_le32(cm_node->tcp_cntxt.rcv_nxt);
2975 nesqp->nesqp_context->snd_wl2 = cpu_to_le32(cm_node->tcp_cntxt.loc_seq_num);
2976 nesqp->nesqp_context->max_snd_wnd = cpu_to_le32(cm_node->tcp_cntxt.max_snd_wnd);
2977
2978 nes_debug(NES_DBG_CM, "QP%u: rcv_nxt = 0x%08X, snd_nxt = 0x%08X,"
2979 " Setting MSS to %u, PDWscale = 0x%08X, rcv_wnd = %u, context misc = 0x%08X.\n",
2980 nesqp->hwqp.qp_id, le32_to_cpu(nesqp->nesqp_context->rcv_nxt),
2981 le32_to_cpu(nesqp->nesqp_context->snd_nxt),
2982 cm_node->tcp_cntxt.mss, le32_to_cpu(nesqp->nesqp_context->pd_index_wscale),
2983 le32_to_cpu(nesqp->nesqp_context->rcv_wnd),
2984 le32_to_cpu(nesqp->nesqp_context->misc));
2985 nes_debug(NES_DBG_CM, " snd_wnd = 0x%08X.\n", le32_to_cpu(nesqp->nesqp_context->snd_wnd));
2986 nes_debug(NES_DBG_CM, " snd_cwnd = 0x%08X.\n", le32_to_cpu(nesqp->nesqp_context->cwnd));
2987 nes_debug(NES_DBG_CM, " max_swnd = 0x%08X.\n", le32_to_cpu(nesqp->nesqp_context->max_snd_wnd));
2988
2989 nes_debug(NES_DBG_CM, "Change cm_node state to TSA\n");
2990 cm_node->state = NES_CM_STATE_TSA;
2991
2992 return ret;
2993 }
2994
2995
2996 /**
2997 * nes_cm_disconn
2998 */
nes_cm_disconn(struct nes_qp * nesqp)2999 int nes_cm_disconn(struct nes_qp *nesqp)
3000 {
3001 struct disconn_work *work;
3002
3003 work = kzalloc(sizeof *work, GFP_ATOMIC);
3004 if (!work)
3005 return -ENOMEM; /* Timer will clean up */
3006
3007 nes_add_ref(&nesqp->ibqp);
3008 work->nesqp = nesqp;
3009 INIT_WORK(&work->work, nes_disconnect_worker);
3010 queue_work(g_cm_core->disconn_wq, &work->work);
3011 return 0;
3012 }
3013
3014
3015 /**
3016 * nes_disconnect_worker
3017 */
nes_disconnect_worker(struct work_struct * work)3018 static void nes_disconnect_worker(struct work_struct *work)
3019 {
3020 struct disconn_work *dwork = container_of(work, struct disconn_work, work);
3021 struct nes_qp *nesqp = dwork->nesqp;
3022
3023 kfree(dwork);
3024 nes_debug(NES_DBG_CM, "processing AEQE id 0x%04X for QP%u.\n",
3025 nesqp->last_aeq, nesqp->hwqp.qp_id);
3026 nes_cm_disconn_true(nesqp);
3027 nes_rem_ref(&nesqp->ibqp);
3028 }
3029
3030
3031 /**
3032 * nes_cm_disconn_true
3033 */
nes_cm_disconn_true(struct nes_qp * nesqp)3034 static int nes_cm_disconn_true(struct nes_qp *nesqp)
3035 {
3036 unsigned long flags;
3037 int ret = 0;
3038 struct iw_cm_id *cm_id;
3039 struct iw_cm_event cm_event;
3040 struct nes_vnic *nesvnic;
3041 u16 last_ae;
3042 u8 original_hw_tcp_state;
3043 u8 original_ibqp_state;
3044 int disconn_status = 0;
3045 int issue_disconn = 0;
3046 int issue_close = 0;
3047 int issue_flush = 0;
3048 u32 flush_q = NES_CQP_FLUSH_RQ;
3049 struct ib_event ibevent;
3050
3051 if (!nesqp) {
3052 nes_debug(NES_DBG_CM, "disconnect_worker nesqp is NULL\n");
3053 return -1;
3054 }
3055
3056 spin_lock_irqsave(&nesqp->lock, flags);
3057 cm_id = nesqp->cm_id;
3058 /* make sure we havent already closed this connection */
3059 if (!cm_id) {
3060 nes_debug(NES_DBG_CM, "QP%u disconnect_worker cmid is NULL\n",
3061 nesqp->hwqp.qp_id);
3062 spin_unlock_irqrestore(&nesqp->lock, flags);
3063 return -1;
3064 }
3065
3066 nesvnic = to_nesvnic(nesqp->ibqp.device);
3067 nes_debug(NES_DBG_CM, "Disconnecting QP%u\n", nesqp->hwqp.qp_id);
3068
3069 original_hw_tcp_state = nesqp->hw_tcp_state;
3070 original_ibqp_state = nesqp->ibqp_state;
3071 last_ae = nesqp->last_aeq;
3072
3073 if (nesqp->term_flags) {
3074 issue_disconn = 1;
3075 issue_close = 1;
3076 nesqp->cm_id = NULL;
3077 del_timer(&nesqp->terminate_timer);
3078 if (nesqp->flush_issued == 0) {
3079 nesqp->flush_issued = 1;
3080 issue_flush = 1;
3081 }
3082 } else if ((original_hw_tcp_state == NES_AEQE_TCP_STATE_CLOSE_WAIT) ||
3083 ((original_ibqp_state == IB_QPS_RTS) &&
3084 (last_ae == NES_AEQE_AEID_LLP_CONNECTION_RESET))) {
3085 issue_disconn = 1;
3086 if (last_ae == NES_AEQE_AEID_LLP_CONNECTION_RESET)
3087 disconn_status = -ECONNRESET;
3088 }
3089
3090 if (((original_hw_tcp_state == NES_AEQE_TCP_STATE_CLOSED) ||
3091 (original_hw_tcp_state == NES_AEQE_TCP_STATE_TIME_WAIT) ||
3092 (last_ae == NES_AEQE_AEID_RDMAP_ROE_BAD_LLP_CLOSE) ||
3093 (last_ae == NES_AEQE_AEID_LLP_CONNECTION_RESET))) {
3094 issue_close = 1;
3095 nesqp->cm_id = NULL;
3096 if (nesqp->flush_issued == 0) {
3097 nesqp->flush_issued = 1;
3098 issue_flush = 1;
3099 }
3100 }
3101
3102 spin_unlock_irqrestore(&nesqp->lock, flags);
3103
3104 if ((issue_flush) && (nesqp->destroyed == 0)) {
3105 /* Flush the queue(s) */
3106 if (nesqp->hw_iwarp_state >= NES_AEQE_IWARP_STATE_TERMINATE)
3107 flush_q |= NES_CQP_FLUSH_SQ;
3108 flush_wqes(nesvnic->nesdev, nesqp, flush_q, 1);
3109
3110 if (nesqp->term_flags) {
3111 ibevent.device = nesqp->ibqp.device;
3112 ibevent.event = nesqp->terminate_eventtype;
3113 ibevent.element.qp = &nesqp->ibqp;
3114 if (nesqp->ibqp.event_handler)
3115 nesqp->ibqp.event_handler(&ibevent, nesqp->ibqp.qp_context);
3116 }
3117 }
3118
3119 if ((cm_id) && (cm_id->event_handler)) {
3120 if (issue_disconn) {
3121 atomic_inc(&cm_disconnects);
3122 cm_event.event = IW_CM_EVENT_DISCONNECT;
3123 cm_event.status = disconn_status;
3124 cm_event.local_addr = cm_id->local_addr;
3125 cm_event.remote_addr = cm_id->remote_addr;
3126 cm_event.private_data = NULL;
3127 cm_event.private_data_len = 0;
3128
3129 nes_debug(NES_DBG_CM, "Generating a CM Disconnect Event"
3130 " for QP%u, SQ Head = %u, SQ Tail = %u. "
3131 "cm_id = %p, refcount = %u.\n",
3132 nesqp->hwqp.qp_id, nesqp->hwqp.sq_head,
3133 nesqp->hwqp.sq_tail, cm_id,
3134 atomic_read(&nesqp->refcount));
3135
3136 ret = cm_id->event_handler(cm_id, &cm_event);
3137 if (ret)
3138 nes_debug(NES_DBG_CM, "OFA CM event_handler "
3139 "returned, ret=%d\n", ret);
3140 }
3141
3142 if (issue_close) {
3143 atomic_inc(&cm_closes);
3144 nes_disconnect(nesqp, 1);
3145
3146 cm_id->provider_data = nesqp;
3147 /* Send up the close complete event */
3148 cm_event.event = IW_CM_EVENT_CLOSE;
3149 cm_event.status = 0;
3150 cm_event.provider_data = cm_id->provider_data;
3151 cm_event.local_addr = cm_id->local_addr;
3152 cm_event.remote_addr = cm_id->remote_addr;
3153 cm_event.private_data = NULL;
3154 cm_event.private_data_len = 0;
3155
3156 ret = cm_id->event_handler(cm_id, &cm_event);
3157 if (ret)
3158 nes_debug(NES_DBG_CM, "OFA CM event_handler returned, ret=%d\n", ret);
3159
3160 cm_id->rem_ref(cm_id);
3161 }
3162 }
3163
3164 return 0;
3165 }
3166
3167
3168 /**
3169 * nes_disconnect
3170 */
nes_disconnect(struct nes_qp * nesqp,int abrupt)3171 static int nes_disconnect(struct nes_qp *nesqp, int abrupt)
3172 {
3173 int ret = 0;
3174 struct nes_vnic *nesvnic;
3175 struct nes_device *nesdev;
3176 struct nes_ib_device *nesibdev;
3177
3178 nesvnic = to_nesvnic(nesqp->ibqp.device);
3179 if (!nesvnic)
3180 return -EINVAL;
3181
3182 nesdev = nesvnic->nesdev;
3183 nesibdev = nesvnic->nesibdev;
3184
3185 nes_debug(NES_DBG_CM, "netdev refcnt = %u.\n",
3186 netdev_refcnt_read(nesvnic->netdev));
3187
3188 if (nesqp->active_conn) {
3189
3190 /* indicate this connection is NOT active */
3191 nesqp->active_conn = 0;
3192 } else {
3193 /* Need to free the Last Streaming Mode Message */
3194 if (nesqp->ietf_frame) {
3195 if (nesqp->lsmm_mr)
3196 nesibdev->ibdev.dereg_mr(nesqp->lsmm_mr);
3197 pci_free_consistent(nesdev->pcidev,
3198 nesqp->private_data_len + nesqp->ietf_frame_size,
3199 nesqp->ietf_frame, nesqp->ietf_frame_pbase);
3200 }
3201 }
3202
3203 /* close the CM node down if it is still active */
3204 if (nesqp->cm_node) {
3205 nes_debug(NES_DBG_CM, "Call close API\n");
3206
3207 g_cm_core->api->close(g_cm_core, nesqp->cm_node);
3208 }
3209
3210 return ret;
3211 }
3212
3213
3214 /**
3215 * nes_accept
3216 */
nes_accept(struct iw_cm_id * cm_id,struct iw_cm_conn_param * conn_param)3217 int nes_accept(struct iw_cm_id *cm_id, struct iw_cm_conn_param *conn_param)
3218 {
3219 u64 u64temp;
3220 struct ib_qp *ibqp;
3221 struct nes_qp *nesqp;
3222 struct nes_vnic *nesvnic;
3223 struct nes_device *nesdev;
3224 struct nes_cm_node *cm_node;
3225 struct nes_adapter *adapter;
3226 struct ib_qp_attr attr;
3227 struct iw_cm_event cm_event;
3228 struct nes_hw_qp_wqe *wqe;
3229 struct nes_v4_quad nes_quad;
3230 u32 crc_value;
3231 int ret;
3232 int passive_state;
3233 struct nes_ib_device *nesibdev;
3234 struct ib_mr *ibmr = NULL;
3235 struct ib_phys_buf ibphysbuf;
3236 struct nes_pd *nespd;
3237 u64 tagged_offset;
3238 u8 mpa_frame_offset = 0;
3239 struct ietf_mpa_v2 *mpa_v2_frame;
3240 u8 start_addr = 0;
3241 u8 *start_ptr = &start_addr;
3242 u8 **start_buff = &start_ptr;
3243 u16 buff_len = 0;
3244 struct sockaddr_in *laddr = (struct sockaddr_in *)&cm_id->local_addr;
3245 struct sockaddr_in *raddr = (struct sockaddr_in *)&cm_id->remote_addr;
3246
3247 ibqp = nes_get_qp(cm_id->device, conn_param->qpn);
3248 if (!ibqp)
3249 return -EINVAL;
3250
3251 /* get all our handles */
3252 nesqp = to_nesqp(ibqp);
3253 nesvnic = to_nesvnic(nesqp->ibqp.device);
3254 nesdev = nesvnic->nesdev;
3255 adapter = nesdev->nesadapter;
3256
3257 cm_node = (struct nes_cm_node *)cm_id->provider_data;
3258 nes_debug(NES_DBG_CM, "nes_accept: cm_node= %p nesvnic=%p, netdev=%p,"
3259 "%s\n", cm_node, nesvnic, nesvnic->netdev,
3260 nesvnic->netdev->name);
3261
3262 if (NES_CM_STATE_LISTENER_DESTROYED == cm_node->state) {
3263 if (cm_node->loopbackpartner)
3264 rem_ref_cm_node(cm_node->cm_core, cm_node->loopbackpartner);
3265 rem_ref_cm_node(cm_node->cm_core, cm_node);
3266 return -EINVAL;
3267 }
3268
3269 passive_state = atomic_add_return(1, &cm_node->passive_state);
3270 if (passive_state == NES_SEND_RESET_EVENT) {
3271 rem_ref_cm_node(cm_node->cm_core, cm_node);
3272 return -ECONNRESET;
3273 }
3274 /* associate the node with the QP */
3275 nesqp->cm_node = (void *)cm_node;
3276 cm_node->nesqp = nesqp;
3277
3278
3279 nes_debug(NES_DBG_CM, "QP%u, cm_node=%p, jiffies = %lu listener = %p\n",
3280 nesqp->hwqp.qp_id, cm_node, jiffies, cm_node->listener);
3281 atomic_inc(&cm_accepts);
3282
3283 nes_debug(NES_DBG_CM, "netdev refcnt = %u.\n",
3284 netdev_refcnt_read(nesvnic->netdev));
3285
3286 nesqp->ietf_frame_size = sizeof(struct ietf_mpa_v2);
3287 /* allocate the ietf frame and space for private data */
3288 nesqp->ietf_frame = pci_alloc_consistent(nesdev->pcidev,
3289 nesqp->ietf_frame_size + conn_param->private_data_len,
3290 &nesqp->ietf_frame_pbase);
3291
3292 if (!nesqp->ietf_frame) {
3293 nes_debug(NES_DBG_CM, "Unable to allocate memory for private data\n");
3294 return -ENOMEM;
3295 }
3296 mpa_v2_frame = (struct ietf_mpa_v2 *)nesqp->ietf_frame;
3297
3298 if (cm_node->mpa_frame_rev == IETF_MPA_V1)
3299 mpa_frame_offset = 4;
3300
3301 if (cm_node->mpa_frame_rev == IETF_MPA_V1 ||
3302 cm_node->mpav2_ird_ord == IETF_NO_IRD_ORD) {
3303 record_ird_ord(cm_node, (u16)conn_param->ird, (u16)conn_param->ord);
3304 }
3305
3306 memcpy(mpa_v2_frame->priv_data, conn_param->private_data,
3307 conn_param->private_data_len);
3308
3309 cm_build_mpa_frame(cm_node, start_buff, &buff_len, nesqp->ietf_frame, MPA_KEY_REPLY);
3310 nesqp->private_data_len = conn_param->private_data_len;
3311
3312 /* setup our first outgoing iWarp send WQE (the IETF frame response) */
3313 wqe = &nesqp->hwqp.sq_vbase[0];
3314
3315 if (raddr->sin_addr.s_addr != laddr->sin_addr.s_addr) {
3316 u64temp = (unsigned long)nesqp;
3317 nesibdev = nesvnic->nesibdev;
3318 nespd = nesqp->nespd;
3319 ibphysbuf.addr = nesqp->ietf_frame_pbase + mpa_frame_offset;
3320 ibphysbuf.size = buff_len;
3321 tagged_offset = (u64)(unsigned long)*start_buff;
3322 ibmr = nesibdev->ibdev.reg_phys_mr((struct ib_pd *)nespd,
3323 &ibphysbuf, 1,
3324 IB_ACCESS_LOCAL_WRITE,
3325 &tagged_offset);
3326 if (!ibmr) {
3327 nes_debug(NES_DBG_CM, "Unable to register memory region"
3328 "for lSMM for cm_node = %p \n",
3329 cm_node);
3330 pci_free_consistent(nesdev->pcidev,
3331 nesqp->private_data_len + nesqp->ietf_frame_size,
3332 nesqp->ietf_frame, nesqp->ietf_frame_pbase);
3333 return -ENOMEM;
3334 }
3335
3336 ibmr->pd = &nespd->ibpd;
3337 ibmr->device = nespd->ibpd.device;
3338 nesqp->lsmm_mr = ibmr;
3339
3340 u64temp |= NES_SW_CONTEXT_ALIGN >> 1;
3341 set_wqe_64bit_value(wqe->wqe_words,
3342 NES_IWARP_SQ_WQE_COMP_CTX_LOW_IDX,
3343 u64temp);
3344 wqe->wqe_words[NES_IWARP_SQ_WQE_MISC_IDX] =
3345 cpu_to_le32(NES_IWARP_SQ_WQE_STREAMING |
3346 NES_IWARP_SQ_WQE_WRPDU);
3347 wqe->wqe_words[NES_IWARP_SQ_WQE_TOTAL_PAYLOAD_IDX] =
3348 cpu_to_le32(buff_len);
3349 set_wqe_64bit_value(wqe->wqe_words,
3350 NES_IWARP_SQ_WQE_FRAG0_LOW_IDX,
3351 (u64)(unsigned long)(*start_buff));
3352 wqe->wqe_words[NES_IWARP_SQ_WQE_LENGTH0_IDX] =
3353 cpu_to_le32(buff_len);
3354 wqe->wqe_words[NES_IWARP_SQ_WQE_STAG0_IDX] = ibmr->lkey;
3355 if (nesqp->sq_kmapped) {
3356 nesqp->sq_kmapped = 0;
3357 kunmap(nesqp->page);
3358 }
3359
3360 nesqp->nesqp_context->ird_ord_sizes |=
3361 cpu_to_le32(NES_QPCONTEXT_ORDIRD_LSMM_PRESENT |
3362 NES_QPCONTEXT_ORDIRD_WRPDU);
3363 } else {
3364 nesqp->nesqp_context->ird_ord_sizes |=
3365 cpu_to_le32(NES_QPCONTEXT_ORDIRD_WRPDU);
3366 }
3367 nesqp->skip_lsmm = 1;
3368
3369 /* Cache the cm_id in the qp */
3370 nesqp->cm_id = cm_id;
3371 cm_node->cm_id = cm_id;
3372
3373 /* nesqp->cm_node = (void *)cm_id->provider_data; */
3374 cm_id->provider_data = nesqp;
3375 nesqp->active_conn = 0;
3376
3377 if (cm_node->state == NES_CM_STATE_TSA)
3378 nes_debug(NES_DBG_CM, "Already state = TSA for cm_node=%p\n",
3379 cm_node);
3380
3381 nes_cm_init_tsa_conn(nesqp, cm_node);
3382
3383 nesqp->nesqp_context->tcpPorts[0] =
3384 cpu_to_le16(cm_node->mapped_loc_port);
3385 nesqp->nesqp_context->tcpPorts[1] =
3386 cpu_to_le16(cm_node->mapped_rem_port);
3387
3388 nesqp->nesqp_context->ip0 = cpu_to_le32(cm_node->mapped_rem_addr);
3389
3390 nesqp->nesqp_context->misc2 |= cpu_to_le32(
3391 (u32)PCI_FUNC(nesdev->pcidev->devfn) <<
3392 NES_QPCONTEXT_MISC2_SRC_IP_SHIFT);
3393
3394 nesqp->nesqp_context->arp_index_vlan |=
3395 cpu_to_le32(nes_arp_table(nesdev,
3396 le32_to_cpu(nesqp->nesqp_context->ip0), NULL,
3397 NES_ARP_RESOLVE) << 16);
3398
3399 nesqp->nesqp_context->ts_val_delta = cpu_to_le32(
3400 jiffies - nes_read_indexed(nesdev, NES_IDX_TCP_NOW));
3401
3402 nesqp->nesqp_context->ird_index = cpu_to_le32(nesqp->hwqp.qp_id);
3403
3404 nesqp->nesqp_context->ird_ord_sizes |= cpu_to_le32(
3405 ((u32)1 << NES_QPCONTEXT_ORDIRD_IWARP_MODE_SHIFT));
3406 nesqp->nesqp_context->ird_ord_sizes |=
3407 cpu_to_le32((u32)cm_node->ord_size);
3408
3409 memset(&nes_quad, 0, sizeof(nes_quad));
3410 nes_quad.DstIpAdrIndex =
3411 cpu_to_le32((u32)PCI_FUNC(nesdev->pcidev->devfn) << 24);
3412 nes_quad.SrcIpadr = htonl(cm_node->mapped_rem_addr);
3413 nes_quad.TcpPorts[0] = htons(cm_node->mapped_rem_port);
3414 nes_quad.TcpPorts[1] = htons(cm_node->mapped_loc_port);
3415
3416 /* Produce hash key */
3417 crc_value = get_crc_value(&nes_quad);
3418 nesqp->hte_index = cpu_to_be32(crc_value ^ 0xffffffff);
3419 nes_debug(NES_DBG_CM, "HTE Index = 0x%08X, CRC = 0x%08X\n",
3420 nesqp->hte_index, nesqp->hte_index & adapter->hte_index_mask);
3421
3422 nesqp->hte_index &= adapter->hte_index_mask;
3423 nesqp->nesqp_context->hte_index = cpu_to_le32(nesqp->hte_index);
3424
3425 cm_node->cm_core->api->accelerated(cm_node->cm_core, cm_node);
3426
3427 nes_debug(NES_DBG_CM, "QP%u, Destination IP = 0x%08X:0x%04X, local = "
3428 "0x%08X:0x%04X, rcv_nxt=0x%08X, snd_nxt=0x%08X, mpa + "
3429 "private data length=%u.\n", nesqp->hwqp.qp_id,
3430 ntohl(raddr->sin_addr.s_addr), ntohs(raddr->sin_port),
3431 ntohl(laddr->sin_addr.s_addr), ntohs(laddr->sin_port),
3432 le32_to_cpu(nesqp->nesqp_context->rcv_nxt),
3433 le32_to_cpu(nesqp->nesqp_context->snd_nxt),
3434 buff_len);
3435
3436 /* notify OF layer that accept event was successful */
3437 cm_id->add_ref(cm_id);
3438 nes_add_ref(&nesqp->ibqp);
3439
3440 cm_event.event = IW_CM_EVENT_ESTABLISHED;
3441 cm_event.status = 0;
3442 cm_event.provider_data = (void *)nesqp;
3443 cm_event.local_addr = cm_id->local_addr;
3444 cm_event.remote_addr = cm_id->remote_addr;
3445 cm_event.private_data = NULL;
3446 cm_event.private_data_len = 0;
3447 cm_event.ird = cm_node->ird_size;
3448 cm_event.ord = cm_node->ord_size;
3449
3450 ret = cm_id->event_handler(cm_id, &cm_event);
3451 attr.qp_state = IB_QPS_RTS;
3452 nes_modify_qp(&nesqp->ibqp, &attr, IB_QP_STATE, NULL);
3453 if (cm_node->loopbackpartner) {
3454 cm_node->loopbackpartner->mpa_frame_size =
3455 nesqp->private_data_len;
3456 /* copy entire MPA frame to our cm_node's frame */
3457 memcpy(cm_node->loopbackpartner->mpa_frame_buf,
3458 conn_param->private_data, conn_param->private_data_len);
3459 create_event(cm_node->loopbackpartner, NES_CM_EVENT_CONNECTED);
3460 }
3461 if (ret)
3462 printk(KERN_ERR "%s[%u] OFA CM event_handler returned, "
3463 "ret=%d\n", __func__, __LINE__, ret);
3464
3465 return 0;
3466 }
3467
3468
3469 /**
3470 * nes_reject
3471 */
nes_reject(struct iw_cm_id * cm_id,const void * pdata,u8 pdata_len)3472 int nes_reject(struct iw_cm_id *cm_id, const void *pdata, u8 pdata_len)
3473 {
3474 struct nes_cm_node *cm_node;
3475 struct nes_cm_node *loopback;
3476 struct nes_cm_core *cm_core;
3477 u8 *start_buff;
3478
3479 atomic_inc(&cm_rejects);
3480 cm_node = (struct nes_cm_node *)cm_id->provider_data;
3481 loopback = cm_node->loopbackpartner;
3482 cm_core = cm_node->cm_core;
3483 cm_node->cm_id = cm_id;
3484
3485 if (pdata_len + sizeof(struct ietf_mpa_v2) > MAX_CM_BUFFER)
3486 return -EINVAL;
3487
3488 if (loopback) {
3489 memcpy(&loopback->mpa_frame.priv_data, pdata, pdata_len);
3490 loopback->mpa_frame.priv_data_len = pdata_len;
3491 loopback->mpa_frame_size = pdata_len;
3492 } else {
3493 start_buff = &cm_node->mpa_frame_buf[0] + sizeof(struct ietf_mpa_v2);
3494 cm_node->mpa_frame_size = pdata_len;
3495 memcpy(start_buff, pdata, pdata_len);
3496 }
3497 return cm_core->api->reject(cm_core, cm_node);
3498 }
3499
3500
3501 /**
3502 * nes_connect
3503 * setup and launch cm connect node
3504 */
nes_connect(struct iw_cm_id * cm_id,struct iw_cm_conn_param * conn_param)3505 int nes_connect(struct iw_cm_id *cm_id, struct iw_cm_conn_param *conn_param)
3506 {
3507 struct ib_qp *ibqp;
3508 struct nes_qp *nesqp;
3509 struct nes_vnic *nesvnic;
3510 struct nes_device *nesdev;
3511 struct nes_cm_node *cm_node;
3512 struct nes_cm_info cm_info;
3513 int apbvt_set = 0;
3514 struct sockaddr_in *laddr = (struct sockaddr_in *)&cm_id->local_addr;
3515 struct sockaddr_in *raddr = (struct sockaddr_in *)&cm_id->remote_addr;
3516 struct iwpm_dev_data pm_reg_msg;
3517 struct iwpm_sa_data pm_msg;
3518 int iwpm_err = 0;
3519
3520 if (cm_id->remote_addr.ss_family != AF_INET)
3521 return -ENOSYS;
3522 ibqp = nes_get_qp(cm_id->device, conn_param->qpn);
3523 if (!ibqp)
3524 return -EINVAL;
3525 nesqp = to_nesqp(ibqp);
3526 if (!nesqp)
3527 return -EINVAL;
3528 nesvnic = to_nesvnic(nesqp->ibqp.device);
3529 if (!nesvnic)
3530 return -EINVAL;
3531 nesdev = nesvnic->nesdev;
3532 if (!nesdev)
3533 return -EINVAL;
3534
3535 if (!laddr->sin_port || !raddr->sin_port)
3536 return -EINVAL;
3537
3538 nes_debug(NES_DBG_CM, "QP%u, current IP = 0x%08X, Destination IP = "
3539 "0x%08X:0x%04X, local = 0x%08X:0x%04X.\n", nesqp->hwqp.qp_id,
3540 ntohl(nesvnic->local_ipaddr), ntohl(raddr->sin_addr.s_addr),
3541 ntohs(raddr->sin_port), ntohl(laddr->sin_addr.s_addr),
3542 ntohs(laddr->sin_port));
3543
3544 atomic_inc(&cm_connects);
3545 nesqp->active_conn = 1;
3546
3547 /* cache the cm_id in the qp */
3548 nesqp->cm_id = cm_id;
3549 cm_id->provider_data = nesqp;
3550 nesqp->private_data_len = conn_param->private_data_len;
3551
3552 nes_debug(NES_DBG_CM, "requested ord = 0x%08X.\n", (u32)conn_param->ord);
3553 nes_debug(NES_DBG_CM, "mpa private data len =%u\n",
3554 conn_param->private_data_len);
3555
3556 /* set up the connection params for the node */
3557 cm_info.loc_addr = ntohl(laddr->sin_addr.s_addr);
3558 cm_info.loc_port = ntohs(laddr->sin_port);
3559 cm_info.rem_addr = ntohl(raddr->sin_addr.s_addr);
3560 cm_info.rem_port = ntohs(raddr->sin_port);
3561 cm_info.cm_id = cm_id;
3562 cm_info.conn_type = NES_CM_IWARP_CONN_TYPE;
3563
3564 /* No port mapper available, go with the specified peer information */
3565 cm_info.mapped_loc_addr = cm_info.loc_addr;
3566 cm_info.mapped_loc_port = cm_info.loc_port;
3567 cm_info.mapped_rem_addr = cm_info.rem_addr;
3568 cm_info.mapped_rem_port = cm_info.rem_port;
3569
3570 nes_form_reg_msg(nesvnic, &pm_reg_msg);
3571 iwpm_err = iwpm_register_pid(&pm_reg_msg, RDMA_NL_NES);
3572 if (iwpm_err) {
3573 nes_debug(NES_DBG_NLMSG,
3574 "Port Mapper reg pid fail (err = %d).\n", iwpm_err);
3575 }
3576 if (iwpm_valid_pid() && !iwpm_err) {
3577 nes_form_pm_msg(&cm_info, &pm_msg);
3578 iwpm_err = iwpm_add_and_query_mapping(&pm_msg, RDMA_NL_NES);
3579 if (iwpm_err)
3580 nes_debug(NES_DBG_NLMSG,
3581 "Port Mapper query fail (err = %d).\n", iwpm_err);
3582 else
3583 nes_record_pm_msg(&cm_info, &pm_msg);
3584 }
3585
3586 if (laddr->sin_addr.s_addr != raddr->sin_addr.s_addr) {
3587 nes_manage_apbvt(nesvnic, cm_info.mapped_loc_port,
3588 PCI_FUNC(nesdev->pcidev->devfn), NES_MANAGE_APBVT_ADD);
3589 apbvt_set = 1;
3590 }
3591
3592 if (nes_create_mapinfo(&cm_info))
3593 return -ENOMEM;
3594
3595 cm_id->add_ref(cm_id);
3596
3597 /* create a connect CM node connection */
3598 cm_node = g_cm_core->api->connect(g_cm_core, nesvnic,
3599 conn_param->private_data_len, (void *)conn_param->private_data,
3600 &cm_info);
3601 if (!cm_node) {
3602 if (apbvt_set)
3603 nes_manage_apbvt(nesvnic, cm_info.mapped_loc_port,
3604 PCI_FUNC(nesdev->pcidev->devfn),
3605 NES_MANAGE_APBVT_DEL);
3606
3607 nes_debug(NES_DBG_NLMSG, "Delete mapped_loc_port = %04X\n",
3608 cm_info.mapped_loc_port);
3609 nes_remove_mapinfo(cm_info.loc_addr, cm_info.loc_port,
3610 cm_info.mapped_loc_addr, cm_info.mapped_loc_port);
3611 cm_id->rem_ref(cm_id);
3612 return -ENOMEM;
3613 }
3614
3615 record_ird_ord(cm_node, (u16)conn_param->ird, (u16)conn_param->ord);
3616 if (cm_node->send_rdma0_op == SEND_RDMA_READ_ZERO &&
3617 cm_node->ord_size == 0)
3618 cm_node->ord_size = 1;
3619
3620 cm_node->apbvt_set = apbvt_set;
3621 cm_node->tos = cm_id->tos;
3622 nesqp->cm_node = cm_node;
3623 cm_node->nesqp = nesqp;
3624 nes_add_ref(&nesqp->ibqp);
3625
3626 return 0;
3627 }
3628
3629
3630 /**
3631 * nes_create_listen
3632 */
nes_create_listen(struct iw_cm_id * cm_id,int backlog)3633 int nes_create_listen(struct iw_cm_id *cm_id, int backlog)
3634 {
3635 struct nes_vnic *nesvnic;
3636 struct nes_cm_listener *cm_node;
3637 struct nes_cm_info cm_info;
3638 int err;
3639 struct sockaddr_in *laddr = (struct sockaddr_in *)&cm_id->local_addr;
3640
3641 nes_debug(NES_DBG_CM, "cm_id = %p, local port = 0x%04X.\n",
3642 cm_id, ntohs(laddr->sin_port));
3643
3644 if (cm_id->local_addr.ss_family != AF_INET)
3645 return -ENOSYS;
3646 nesvnic = to_nesvnic(cm_id->device);
3647 if (!nesvnic)
3648 return -EINVAL;
3649
3650 nes_debug(NES_DBG_CM, "nesvnic=%p, netdev=%p, %s\n",
3651 nesvnic, nesvnic->netdev, nesvnic->netdev->name);
3652
3653 nes_debug(NES_DBG_CM, "nesvnic->local_ipaddr=0x%08x, sin_addr.s_addr=0x%08x\n",
3654 nesvnic->local_ipaddr, laddr->sin_addr.s_addr);
3655
3656 /* setup listen params in our api call struct */
3657 cm_info.loc_addr = ntohl(nesvnic->local_ipaddr);
3658 cm_info.loc_port = ntohs(laddr->sin_port);
3659 cm_info.backlog = backlog;
3660 cm_info.cm_id = cm_id;
3661
3662 cm_info.conn_type = NES_CM_IWARP_CONN_TYPE;
3663
3664 /* No port mapper available, go with the specified info */
3665 cm_info.mapped_loc_addr = cm_info.loc_addr;
3666 cm_info.mapped_loc_port = cm_info.loc_port;
3667
3668 cm_node = g_cm_core->api->listen(g_cm_core, nesvnic, &cm_info);
3669 if (!cm_node) {
3670 printk(KERN_ERR "%s[%u] Error returned from listen API call\n",
3671 __func__, __LINE__);
3672 return -ENOMEM;
3673 }
3674
3675 cm_id->provider_data = cm_node;
3676 cm_node->tos = cm_id->tos;
3677
3678 if (!cm_node->reused_node) {
3679 if (nes_create_mapinfo(&cm_info))
3680 return -ENOMEM;
3681
3682 err = nes_manage_apbvt(nesvnic, cm_node->mapped_loc_port,
3683 PCI_FUNC(nesvnic->nesdev->pcidev->devfn),
3684 NES_MANAGE_APBVT_ADD);
3685 if (err) {
3686 printk(KERN_ERR "nes_manage_apbvt call returned %d.\n",
3687 err);
3688 g_cm_core->api->stop_listener(g_cm_core, (void *)cm_node);
3689 return err;
3690 }
3691 atomic_inc(&cm_listens_created);
3692 }
3693
3694 cm_id->add_ref(cm_id);
3695 cm_id->provider_data = (void *)cm_node;
3696
3697
3698 return 0;
3699 }
3700
3701
3702 /**
3703 * nes_destroy_listen
3704 */
nes_destroy_listen(struct iw_cm_id * cm_id)3705 int nes_destroy_listen(struct iw_cm_id *cm_id)
3706 {
3707 if (cm_id->provider_data)
3708 g_cm_core->api->stop_listener(g_cm_core, cm_id->provider_data);
3709 else
3710 nes_debug(NES_DBG_CM, "cm_id->provider_data was NULL\n");
3711
3712 cm_id->rem_ref(cm_id);
3713
3714 return 0;
3715 }
3716
3717
3718 /**
3719 * nes_cm_recv
3720 */
nes_cm_recv(struct sk_buff * skb,struct net_device * netdevice)3721 int nes_cm_recv(struct sk_buff *skb, struct net_device *netdevice)
3722 {
3723 int rc = 0;
3724
3725 cm_packets_received++;
3726 if ((g_cm_core) && (g_cm_core->api))
3727 rc = g_cm_core->api->recv_pkt(g_cm_core, netdev_priv(netdevice), skb);
3728 else
3729 nes_debug(NES_DBG_CM, "Unable to process packet for CM,"
3730 " cm is not setup properly.\n");
3731
3732 return rc;
3733 }
3734
3735
3736 /**
3737 * nes_cm_start
3738 * Start and init a cm core module
3739 */
nes_cm_start(void)3740 int nes_cm_start(void)
3741 {
3742 nes_debug(NES_DBG_CM, "\n");
3743 /* create the primary CM core, pass this handle to subsequent core inits */
3744 g_cm_core = nes_cm_alloc_core();
3745 if (g_cm_core)
3746 return 0;
3747 else
3748 return -ENOMEM;
3749 }
3750
3751
3752 /**
3753 * nes_cm_stop
3754 * stop and dealloc all cm core instances
3755 */
nes_cm_stop(void)3756 int nes_cm_stop(void)
3757 {
3758 g_cm_core->api->destroy_cm_core(g_cm_core);
3759 return 0;
3760 }
3761
3762
3763 /**
3764 * cm_event_connected
3765 * handle a connected event, setup QPs and HW
3766 */
cm_event_connected(struct nes_cm_event * event)3767 static void cm_event_connected(struct nes_cm_event *event)
3768 {
3769 struct nes_qp *nesqp;
3770 struct nes_vnic *nesvnic;
3771 struct nes_device *nesdev;
3772 struct nes_cm_node *cm_node;
3773 struct nes_adapter *nesadapter;
3774 struct ib_qp_attr attr;
3775 struct iw_cm_id *cm_id;
3776 struct iw_cm_event cm_event;
3777 struct nes_v4_quad nes_quad;
3778 u32 crc_value;
3779 int ret;
3780 struct sockaddr_in *laddr;
3781 struct sockaddr_in *raddr;
3782 struct sockaddr_in *cm_event_laddr;
3783
3784 /* get all our handles */
3785 cm_node = event->cm_node;
3786 cm_id = cm_node->cm_id;
3787 nes_debug(NES_DBG_CM, "cm_event_connected - %p - cm_id = %p\n", cm_node, cm_id);
3788 nesqp = (struct nes_qp *)cm_id->provider_data;
3789 nesvnic = to_nesvnic(nesqp->ibqp.device);
3790 nesdev = nesvnic->nesdev;
3791 nesadapter = nesdev->nesadapter;
3792 laddr = (struct sockaddr_in *)&cm_id->local_addr;
3793 raddr = (struct sockaddr_in *)&cm_id->remote_addr;
3794 cm_event_laddr = (struct sockaddr_in *)&cm_event.local_addr;
3795
3796 if (nesqp->destroyed)
3797 return;
3798 atomic_inc(&cm_connecteds);
3799 nes_debug(NES_DBG_CM, "QP%u attempting to connect to 0x%08X:0x%04X on"
3800 " local port 0x%04X. jiffies = %lu.\n",
3801 nesqp->hwqp.qp_id, ntohl(raddr->sin_addr.s_addr),
3802 ntohs(raddr->sin_port), ntohs(laddr->sin_port), jiffies);
3803
3804 nes_cm_init_tsa_conn(nesqp, cm_node);
3805
3806 /* set the QP tsa context */
3807 nesqp->nesqp_context->tcpPorts[0] =
3808 cpu_to_le16(cm_node->mapped_loc_port);
3809 nesqp->nesqp_context->tcpPorts[1] =
3810 cpu_to_le16(cm_node->mapped_rem_port);
3811 nesqp->nesqp_context->ip0 = cpu_to_le32(cm_node->mapped_rem_addr);
3812
3813 nesqp->nesqp_context->misc2 |= cpu_to_le32(
3814 (u32)PCI_FUNC(nesdev->pcidev->devfn) <<
3815 NES_QPCONTEXT_MISC2_SRC_IP_SHIFT);
3816 nesqp->nesqp_context->arp_index_vlan |= cpu_to_le32(
3817 nes_arp_table(nesdev,
3818 le32_to_cpu(nesqp->nesqp_context->ip0),
3819 NULL, NES_ARP_RESOLVE) << 16);
3820 nesqp->nesqp_context->ts_val_delta = cpu_to_le32(
3821 jiffies - nes_read_indexed(nesdev, NES_IDX_TCP_NOW));
3822 nesqp->nesqp_context->ird_index = cpu_to_le32(nesqp->hwqp.qp_id);
3823 nesqp->nesqp_context->ird_ord_sizes |=
3824 cpu_to_le32((u32)1 <<
3825 NES_QPCONTEXT_ORDIRD_IWARP_MODE_SHIFT);
3826 nesqp->nesqp_context->ird_ord_sizes |=
3827 cpu_to_le32((u32)cm_node->ord_size);
3828
3829 /* Adjust tail for not having a LSMM */
3830 /*nesqp->hwqp.sq_tail = 1;*/
3831
3832 build_rdma0_msg(cm_node, &nesqp);
3833
3834 nes_write32(nesdev->regs + NES_WQE_ALLOC,
3835 (1 << 24) | 0x00800000 | nesqp->hwqp.qp_id);
3836
3837 memset(&nes_quad, 0, sizeof(nes_quad));
3838
3839 nes_quad.DstIpAdrIndex =
3840 cpu_to_le32((u32)PCI_FUNC(nesdev->pcidev->devfn) << 24);
3841 nes_quad.SrcIpadr = htonl(cm_node->mapped_rem_addr);
3842 nes_quad.TcpPorts[0] = htons(cm_node->mapped_rem_port);
3843 nes_quad.TcpPorts[1] = htons(cm_node->mapped_loc_port);
3844
3845 /* Produce hash key */
3846 crc_value = get_crc_value(&nes_quad);
3847 nesqp->hte_index = cpu_to_be32(crc_value ^ 0xffffffff);
3848 nes_debug(NES_DBG_CM, "HTE Index = 0x%08X, After CRC = 0x%08X\n",
3849 nesqp->hte_index, nesqp->hte_index & nesadapter->hte_index_mask);
3850
3851 nesqp->hte_index &= nesadapter->hte_index_mask;
3852 nesqp->nesqp_context->hte_index = cpu_to_le32(nesqp->hte_index);
3853
3854 nesqp->ietf_frame = &cm_node->mpa_frame;
3855 nesqp->private_data_len = (u8)cm_node->mpa_frame_size;
3856 cm_node->cm_core->api->accelerated(cm_node->cm_core, cm_node);
3857
3858 /* notify OF layer we successfully created the requested connection */
3859 cm_event.event = IW_CM_EVENT_CONNECT_REPLY;
3860 cm_event.status = 0;
3861 cm_event.provider_data = cm_id->provider_data;
3862 cm_event_laddr->sin_family = AF_INET;
3863 cm_event_laddr->sin_port = laddr->sin_port;
3864 cm_event.remote_addr = cm_id->remote_addr;
3865
3866 cm_event.private_data = (void *)event->cm_node->mpa_frame_buf;
3867 cm_event.private_data_len = (u8)event->cm_node->mpa_frame_size;
3868 cm_event.ird = cm_node->ird_size;
3869 cm_event.ord = cm_node->ord_size;
3870
3871 cm_event_laddr->sin_addr.s_addr = htonl(event->cm_info.rem_addr);
3872 ret = cm_id->event_handler(cm_id, &cm_event);
3873 nes_debug(NES_DBG_CM, "OFA CM event_handler returned, ret=%d\n", ret);
3874
3875 if (ret)
3876 printk(KERN_ERR "%s[%u] OFA CM event_handler returned, "
3877 "ret=%d\n", __func__, __LINE__, ret);
3878 attr.qp_state = IB_QPS_RTS;
3879 nes_modify_qp(&nesqp->ibqp, &attr, IB_QP_STATE, NULL);
3880
3881 nes_debug(NES_DBG_CM, "Exiting connect thread for QP%u. jiffies = "
3882 "%lu\n", nesqp->hwqp.qp_id, jiffies);
3883
3884 return;
3885 }
3886
3887
3888 /**
3889 * cm_event_connect_error
3890 */
cm_event_connect_error(struct nes_cm_event * event)3891 static void cm_event_connect_error(struct nes_cm_event *event)
3892 {
3893 struct nes_qp *nesqp;
3894 struct iw_cm_id *cm_id;
3895 struct iw_cm_event cm_event;
3896 /* struct nes_cm_info cm_info; */
3897 int ret;
3898
3899 if (!event->cm_node)
3900 return;
3901
3902 cm_id = event->cm_node->cm_id;
3903 if (!cm_id)
3904 return;
3905
3906 nes_debug(NES_DBG_CM, "cm_node=%p, cm_id=%p\n", event->cm_node, cm_id);
3907 nesqp = cm_id->provider_data;
3908
3909 if (!nesqp)
3910 return;
3911
3912 /* notify OF layer about this connection error event */
3913 /* cm_id->rem_ref(cm_id); */
3914 nesqp->cm_id = NULL;
3915 cm_id->provider_data = NULL;
3916 cm_event.event = IW_CM_EVENT_CONNECT_REPLY;
3917 cm_event.status = -ECONNRESET;
3918 cm_event.provider_data = cm_id->provider_data;
3919 cm_event.local_addr = cm_id->local_addr;
3920 cm_event.remote_addr = cm_id->remote_addr;
3921 cm_event.private_data = NULL;
3922 cm_event.private_data_len = 0;
3923
3924 #ifdef CONFIG_INFINIBAND_NES_DEBUG
3925 {
3926 struct sockaddr_in *cm_event_laddr = (struct sockaddr_in *)
3927 &cm_event.local_addr;
3928 struct sockaddr_in *cm_event_raddr = (struct sockaddr_in *)
3929 &cm_event.remote_addr;
3930 nes_debug(NES_DBG_CM, "call CM_EVENT REJECTED, local_addr=%08x, remote_addr=%08x\n",
3931 cm_event_laddr->sin_addr.s_addr, cm_event_raddr->sin_addr.s_addr);
3932 }
3933 #endif
3934
3935 ret = cm_id->event_handler(cm_id, &cm_event);
3936 nes_debug(NES_DBG_CM, "OFA CM event_handler returned, ret=%d\n", ret);
3937 if (ret)
3938 printk(KERN_ERR "%s[%u] OFA CM event_handler returned, "
3939 "ret=%d\n", __func__, __LINE__, ret);
3940 cm_id->rem_ref(cm_id);
3941
3942 rem_ref_cm_node(event->cm_node->cm_core, event->cm_node);
3943 return;
3944 }
3945
3946
3947 /**
3948 * cm_event_reset
3949 */
cm_event_reset(struct nes_cm_event * event)3950 static void cm_event_reset(struct nes_cm_event *event)
3951 {
3952 struct nes_qp *nesqp;
3953 struct iw_cm_id *cm_id;
3954 struct iw_cm_event cm_event;
3955 /* struct nes_cm_info cm_info; */
3956 int ret;
3957
3958 if (!event->cm_node)
3959 return;
3960
3961 if (!event->cm_node->cm_id)
3962 return;
3963
3964 cm_id = event->cm_node->cm_id;
3965
3966 nes_debug(NES_DBG_CM, "%p - cm_id = %p\n", event->cm_node, cm_id);
3967 nesqp = cm_id->provider_data;
3968 if (!nesqp)
3969 return;
3970
3971 nesqp->cm_id = NULL;
3972 /* cm_id->provider_data = NULL; */
3973 cm_event.event = IW_CM_EVENT_DISCONNECT;
3974 cm_event.status = -ECONNRESET;
3975 cm_event.provider_data = cm_id->provider_data;
3976 cm_event.local_addr = cm_id->local_addr;
3977 cm_event.remote_addr = cm_id->remote_addr;
3978 cm_event.private_data = NULL;
3979 cm_event.private_data_len = 0;
3980
3981 cm_id->add_ref(cm_id);
3982 ret = cm_id->event_handler(cm_id, &cm_event);
3983 atomic_inc(&cm_closes);
3984 cm_event.event = IW_CM_EVENT_CLOSE;
3985 cm_event.status = 0;
3986 cm_event.provider_data = cm_id->provider_data;
3987 cm_event.local_addr = cm_id->local_addr;
3988 cm_event.remote_addr = cm_id->remote_addr;
3989 cm_event.private_data = NULL;
3990 cm_event.private_data_len = 0;
3991 nes_debug(NES_DBG_CM, "NODE %p Generating CLOSE\n", event->cm_node);
3992 ret = cm_id->event_handler(cm_id, &cm_event);
3993
3994 nes_debug(NES_DBG_CM, "OFA CM event_handler returned, ret=%d\n", ret);
3995
3996
3997 /* notify OF layer about this connection error event */
3998 cm_id->rem_ref(cm_id);
3999
4000 return;
4001 }
4002
4003
4004 /**
4005 * cm_event_mpa_req
4006 */
cm_event_mpa_req(struct nes_cm_event * event)4007 static void cm_event_mpa_req(struct nes_cm_event *event)
4008 {
4009 struct iw_cm_id *cm_id;
4010 struct iw_cm_event cm_event;
4011 int ret;
4012 struct nes_cm_node *cm_node;
4013 struct sockaddr_in *cm_event_laddr = (struct sockaddr_in *)
4014 &cm_event.local_addr;
4015 struct sockaddr_in *cm_event_raddr = (struct sockaddr_in *)
4016 &cm_event.remote_addr;
4017
4018 cm_node = event->cm_node;
4019 if (!cm_node)
4020 return;
4021 cm_id = cm_node->cm_id;
4022
4023 atomic_inc(&cm_connect_reqs);
4024 nes_debug(NES_DBG_CM, "cm_node = %p - cm_id = %p, jiffies = %lu\n",
4025 cm_node, cm_id, jiffies);
4026
4027 cm_event.event = IW_CM_EVENT_CONNECT_REQUEST;
4028 cm_event.status = 0;
4029 cm_event.provider_data = (void *)cm_node;
4030
4031 cm_event_laddr->sin_family = AF_INET;
4032 cm_event_laddr->sin_port = htons(event->cm_info.loc_port);
4033 cm_event_laddr->sin_addr.s_addr = htonl(event->cm_info.loc_addr);
4034
4035 cm_event_raddr->sin_family = AF_INET;
4036 cm_event_raddr->sin_port = htons(event->cm_info.rem_port);
4037 cm_event_raddr->sin_addr.s_addr = htonl(event->cm_info.rem_addr);
4038 cm_event.private_data = cm_node->mpa_frame_buf;
4039 cm_event.private_data_len = (u8)cm_node->mpa_frame_size;
4040 if (cm_node->mpa_frame_rev == IETF_MPA_V1) {
4041 cm_event.ird = NES_MAX_IRD;
4042 cm_event.ord = NES_MAX_ORD;
4043 } else {
4044 cm_event.ird = cm_node->ird_size;
4045 cm_event.ord = cm_node->ord_size;
4046 }
4047
4048 ret = cm_id->event_handler(cm_id, &cm_event);
4049 if (ret)
4050 printk(KERN_ERR "%s[%u] OFA CM event_handler returned, ret=%d\n",
4051 __func__, __LINE__, ret);
4052 return;
4053 }
4054
4055
cm_event_mpa_reject(struct nes_cm_event * event)4056 static void cm_event_mpa_reject(struct nes_cm_event *event)
4057 {
4058 struct iw_cm_id *cm_id;
4059 struct iw_cm_event cm_event;
4060 struct nes_cm_node *cm_node;
4061 int ret;
4062 struct sockaddr_in *cm_event_laddr = (struct sockaddr_in *)
4063 &cm_event.local_addr;
4064 struct sockaddr_in *cm_event_raddr = (struct sockaddr_in *)
4065 &cm_event.remote_addr;
4066
4067 cm_node = event->cm_node;
4068 if (!cm_node)
4069 return;
4070 cm_id = cm_node->cm_id;
4071
4072 atomic_inc(&cm_connect_reqs);
4073 nes_debug(NES_DBG_CM, "cm_node = %p - cm_id = %p, jiffies = %lu\n",
4074 cm_node, cm_id, jiffies);
4075
4076 cm_event.event = IW_CM_EVENT_CONNECT_REPLY;
4077 cm_event.status = -ECONNREFUSED;
4078 cm_event.provider_data = cm_id->provider_data;
4079
4080 cm_event_laddr->sin_family = AF_INET;
4081 cm_event_laddr->sin_port = htons(event->cm_info.loc_port);
4082 cm_event_laddr->sin_addr.s_addr = htonl(event->cm_info.loc_addr);
4083
4084 cm_event_raddr->sin_family = AF_INET;
4085 cm_event_raddr->sin_port = htons(event->cm_info.rem_port);
4086 cm_event_raddr->sin_addr.s_addr = htonl(event->cm_info.rem_addr);
4087
4088 cm_event.private_data = cm_node->mpa_frame_buf;
4089 cm_event.private_data_len = (u8)cm_node->mpa_frame_size;
4090
4091 nes_debug(NES_DBG_CM, "call CM_EVENT_MPA_REJECTED, local_addr=%08x, "
4092 "remove_addr=%08x\n",
4093 cm_event_laddr->sin_addr.s_addr,
4094 cm_event_raddr->sin_addr.s_addr);
4095
4096 ret = cm_id->event_handler(cm_id, &cm_event);
4097 if (ret)
4098 printk(KERN_ERR "%s[%u] OFA CM event_handler returned, ret=%d\n",
4099 __func__, __LINE__, ret);
4100
4101 return;
4102 }
4103
4104
4105 static void nes_cm_event_handler(struct work_struct *);
4106
4107 /**
4108 * nes_cm_post_event
4109 * post an event to the cm event handler
4110 */
nes_cm_post_event(struct nes_cm_event * event)4111 static int nes_cm_post_event(struct nes_cm_event *event)
4112 {
4113 atomic_inc(&event->cm_node->cm_core->events_posted);
4114 add_ref_cm_node(event->cm_node);
4115 event->cm_info.cm_id->add_ref(event->cm_info.cm_id);
4116 INIT_WORK(&event->event_work, nes_cm_event_handler);
4117 nes_debug(NES_DBG_CM, "cm_node=%p queue_work, event=%p\n",
4118 event->cm_node, event);
4119
4120 queue_work(event->cm_node->cm_core->event_wq, &event->event_work);
4121
4122 nes_debug(NES_DBG_CM, "Exit\n");
4123 return 0;
4124 }
4125
4126
4127 /**
4128 * nes_cm_event_handler
4129 * worker function to handle cm events
4130 * will free instance of nes_cm_event
4131 */
nes_cm_event_handler(struct work_struct * work)4132 static void nes_cm_event_handler(struct work_struct *work)
4133 {
4134 struct nes_cm_event *event = container_of(work, struct nes_cm_event,
4135 event_work);
4136 struct nes_cm_core *cm_core;
4137
4138 if ((!event) || (!event->cm_node) || (!event->cm_node->cm_core))
4139 return;
4140
4141 cm_core = event->cm_node->cm_core;
4142 nes_debug(NES_DBG_CM, "event=%p, event->type=%u, events posted=%u\n",
4143 event, event->type, atomic_read(&cm_core->events_posted));
4144
4145 switch (event->type) {
4146 case NES_CM_EVENT_MPA_REQ:
4147 cm_event_mpa_req(event);
4148 nes_debug(NES_DBG_CM, "cm_node=%p CM Event: MPA REQUEST\n",
4149 event->cm_node);
4150 break;
4151 case NES_CM_EVENT_RESET:
4152 nes_debug(NES_DBG_CM, "cm_node = %p CM Event: RESET\n",
4153 event->cm_node);
4154 cm_event_reset(event);
4155 break;
4156 case NES_CM_EVENT_CONNECTED:
4157 if ((!event->cm_node->cm_id) ||
4158 (event->cm_node->state != NES_CM_STATE_TSA))
4159 break;
4160 cm_event_connected(event);
4161 nes_debug(NES_DBG_CM, "CM Event: CONNECTED\n");
4162 break;
4163 case NES_CM_EVENT_MPA_REJECT:
4164 if ((!event->cm_node->cm_id) ||
4165 (event->cm_node->state == NES_CM_STATE_TSA))
4166 break;
4167 cm_event_mpa_reject(event);
4168 nes_debug(NES_DBG_CM, "CM Event: REJECT\n");
4169 break;
4170
4171 case NES_CM_EVENT_ABORTED:
4172 if ((!event->cm_node->cm_id) ||
4173 (event->cm_node->state == NES_CM_STATE_TSA))
4174 break;
4175 cm_event_connect_error(event);
4176 nes_debug(NES_DBG_CM, "CM Event: ABORTED\n");
4177 break;
4178 case NES_CM_EVENT_DROPPED_PKT:
4179 nes_debug(NES_DBG_CM, "CM Event: DROPPED PKT\n");
4180 break;
4181 default:
4182 nes_debug(NES_DBG_CM, "CM Event: UNKNOWN EVENT TYPE\n");
4183 break;
4184 }
4185
4186 atomic_dec(&cm_core->events_posted);
4187 event->cm_info.cm_id->rem_ref(event->cm_info.cm_id);
4188 rem_ref_cm_node(cm_core, event->cm_node);
4189 kfree(event);
4190
4191 return;
4192 }
4193