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
1524 rt = ip_route_output(&init_net, htonl(dst_ip), 0, 0, 0);
1525 if (IS_ERR(rt)) {
1526 printk(KERN_ERR "%s: ip_route_output_key failed for 0x%08X\n",
1527 __func__, dst_ip);
1528 return rc;
1529 }
1530
1531 if (netif_is_bond_slave(nesvnic->netdev))
1532 netdev = netdev_master_upper_dev_get(nesvnic->netdev);
1533 else
1534 netdev = nesvnic->netdev;
1535
1536 neigh = neigh_lookup(&arp_tbl, &rt->rt_gateway, netdev);
1537
1538 rcu_read_lock();
1539 if (neigh) {
1540 if (neigh->nud_state & NUD_VALID) {
1541 nes_debug(NES_DBG_CM, "Neighbor MAC address for 0x%08X"
1542 " is %pM, Gateway is 0x%08X \n", dst_ip,
1543 neigh->ha, ntohl(rt->rt_gateway));
1544
1545 if (arpindex >= 0) {
1546 if (ether_addr_equal(nesadapter->arp_table[arpindex].mac_addr, neigh->ha)) {
1547 /* Mac address same as in nes_arp_table */
1548 goto out;
1549 }
1550
1551 nes_manage_arp_cache(nesvnic->netdev,
1552 nesadapter->arp_table[arpindex].mac_addr,
1553 dst_ip, NES_ARP_DELETE);
1554 }
1555
1556 nes_manage_arp_cache(nesvnic->netdev, neigh->ha,
1557 dst_ip, NES_ARP_ADD);
1558 rc = nes_arp_table(nesvnic->nesdev, dst_ip, NULL,
1559 NES_ARP_RESOLVE);
1560 } else {
1561 neigh_event_send(neigh, NULL);
1562 }
1563 }
1564 out:
1565 rcu_read_unlock();
1566
1567 if (neigh)
1568 neigh_release(neigh);
1569
1570 ip_rt_put(rt);
1571 return rc;
1572 }
1573
1574 /**
1575 * make_cm_node - create a new instance of a cm node
1576 */
make_cm_node(struct nes_cm_core * cm_core,struct nes_vnic * nesvnic,struct nes_cm_info * cm_info,struct nes_cm_listener * listener)1577 static struct nes_cm_node *make_cm_node(struct nes_cm_core *cm_core,
1578 struct nes_vnic *nesvnic, struct nes_cm_info *cm_info,
1579 struct nes_cm_listener *listener)
1580 {
1581 struct nes_cm_node *cm_node;
1582 struct timespec ts;
1583 int oldarpindex = 0;
1584 int arpindex = 0;
1585 struct nes_device *nesdev;
1586 struct nes_adapter *nesadapter;
1587
1588 /* create an hte and cm_node for this instance */
1589 cm_node = kzalloc(sizeof(*cm_node), GFP_ATOMIC);
1590 if (!cm_node)
1591 return NULL;
1592
1593 /* set our node specific transport info */
1594 if (listener) {
1595 cm_node->loc_addr = listener->loc_addr;
1596 cm_node->loc_port = listener->loc_port;
1597 } else {
1598 cm_node->loc_addr = cm_info->loc_addr;
1599 cm_node->loc_port = cm_info->loc_port;
1600 }
1601 cm_node->rem_addr = cm_info->rem_addr;
1602 cm_node->rem_port = cm_info->rem_port;
1603
1604 cm_node->mapped_loc_addr = cm_info->mapped_loc_addr;
1605 cm_node->mapped_rem_addr = cm_info->mapped_rem_addr;
1606 cm_node->mapped_loc_port = cm_info->mapped_loc_port;
1607 cm_node->mapped_rem_port = cm_info->mapped_rem_port;
1608
1609 cm_node->mpa_frame_rev = mpa_version;
1610 cm_node->send_rdma0_op = SEND_RDMA_READ_ZERO;
1611 cm_node->mpav2_ird_ord = 0;
1612 cm_node->ird_size = 0;
1613 cm_node->ord_size = 0;
1614
1615 nes_debug(NES_DBG_CM, "Make node addresses : loc = %pI4:%x, rem = %pI4:%x\n",
1616 &cm_node->loc_addr, cm_node->loc_port,
1617 &cm_node->rem_addr, cm_node->rem_port);
1618 cm_node->listener = listener;
1619 cm_node->netdev = nesvnic->netdev;
1620 cm_node->cm_id = cm_info->cm_id;
1621 memcpy(cm_node->loc_mac, nesvnic->netdev->dev_addr, ETH_ALEN);
1622
1623 nes_debug(NES_DBG_CM, "listener=%p, cm_id=%p\n", cm_node->listener,
1624 cm_node->cm_id);
1625
1626 spin_lock_init(&cm_node->retrans_list_lock);
1627
1628 cm_node->loopbackpartner = NULL;
1629 atomic_set(&cm_node->ref_count, 1);
1630 /* associate our parent CM core */
1631 cm_node->cm_core = cm_core;
1632 cm_node->tcp_cntxt.loc_id = NES_CM_DEF_LOCAL_ID;
1633 cm_node->tcp_cntxt.rcv_wscale = NES_CM_DEFAULT_RCV_WND_SCALE;
1634 cm_node->tcp_cntxt.rcv_wnd = NES_CM_DEFAULT_RCV_WND_SCALED >>
1635 NES_CM_DEFAULT_RCV_WND_SCALE;
1636 ts = current_kernel_time();
1637 cm_node->tcp_cntxt.loc_seq_num = htonl(ts.tv_nsec);
1638 cm_node->tcp_cntxt.mss = nesvnic->max_frame_size - sizeof(struct iphdr) -
1639 sizeof(struct tcphdr) - ETH_HLEN - VLAN_HLEN;
1640 cm_node->tcp_cntxt.rcv_nxt = 0;
1641 /* get a unique session ID , add thread_id to an upcounter to handle race */
1642 atomic_inc(&cm_core->node_cnt);
1643 cm_node->conn_type = cm_info->conn_type;
1644 cm_node->apbvt_set = 0;
1645 cm_node->accept_pend = 0;
1646
1647 cm_node->nesvnic = nesvnic;
1648 /* get some device handles, for arp lookup */
1649 nesdev = nesvnic->nesdev;
1650 nesadapter = nesdev->nesadapter;
1651
1652 cm_node->loopbackpartner = NULL;
1653
1654 /* get the mac addr for the remote node */
1655 oldarpindex = nes_arp_table(nesdev, cm_node->mapped_rem_addr,
1656 NULL, NES_ARP_RESOLVE);
1657 arpindex = nes_addr_resolve_neigh(nesvnic,
1658 cm_node->mapped_rem_addr, oldarpindex);
1659 if (arpindex < 0) {
1660 kfree(cm_node);
1661 return NULL;
1662 }
1663
1664 /* copy the mac addr to node context */
1665 memcpy(cm_node->rem_mac, nesadapter->arp_table[arpindex].mac_addr, ETH_ALEN);
1666 nes_debug(NES_DBG_CM, "Remote mac addr from arp table: %pM\n",
1667 cm_node->rem_mac);
1668
1669 add_hte_node(cm_core, cm_node);
1670 atomic_inc(&cm_nodes_created);
1671
1672 return cm_node;
1673 }
1674
1675
1676 /**
1677 * add_ref_cm_node - destroy an instance of a cm node
1678 */
add_ref_cm_node(struct nes_cm_node * cm_node)1679 static int add_ref_cm_node(struct nes_cm_node *cm_node)
1680 {
1681 atomic_inc(&cm_node->ref_count);
1682 return 0;
1683 }
1684
1685
1686 /**
1687 * rem_ref_cm_node - destroy an instance of a cm node
1688 */
rem_ref_cm_node(struct nes_cm_core * cm_core,struct nes_cm_node * cm_node)1689 static int rem_ref_cm_node(struct nes_cm_core *cm_core,
1690 struct nes_cm_node *cm_node)
1691 {
1692 unsigned long flags;
1693 struct nes_qp *nesqp;
1694
1695 if (!cm_node)
1696 return -EINVAL;
1697
1698 spin_lock_irqsave(&cm_node->cm_core->ht_lock, flags);
1699 if (atomic_dec_return(&cm_node->ref_count)) {
1700 spin_unlock_irqrestore(&cm_node->cm_core->ht_lock, flags);
1701 return 0;
1702 }
1703 list_del(&cm_node->list);
1704 atomic_dec(&cm_core->ht_node_cnt);
1705 spin_unlock_irqrestore(&cm_node->cm_core->ht_lock, flags);
1706
1707 /* if the node is destroyed before connection was accelerated */
1708 if (!cm_node->accelerated && cm_node->accept_pend) {
1709 BUG_ON(!cm_node->listener);
1710 atomic_dec(&cm_node->listener->pend_accepts_cnt);
1711 BUG_ON(atomic_read(&cm_node->listener->pend_accepts_cnt) < 0);
1712 }
1713 WARN_ON(cm_node->send_entry);
1714 if (cm_node->recv_entry)
1715 handle_recv_entry(cm_node, 0);
1716 if (cm_node->listener) {
1717 mini_cm_dec_refcnt_listen(cm_core, cm_node->listener, 0);
1718 } else {
1719 if (cm_node->apbvt_set && cm_node->nesvnic) {
1720 nes_manage_apbvt(cm_node->nesvnic, cm_node->mapped_loc_port,
1721 PCI_FUNC(cm_node->nesvnic->nesdev->pcidev->devfn),
1722 NES_MANAGE_APBVT_DEL);
1723 }
1724 nes_debug(NES_DBG_NLMSG, "Delete APBVT mapped_loc_port = %04X\n",
1725 cm_node->mapped_loc_port);
1726 nes_remove_mapinfo(cm_node->loc_addr, cm_node->loc_port,
1727 cm_node->mapped_loc_addr, cm_node->mapped_loc_port);
1728 }
1729
1730 atomic_dec(&cm_core->node_cnt);
1731 atomic_inc(&cm_nodes_destroyed);
1732 nesqp = cm_node->nesqp;
1733 if (nesqp) {
1734 nesqp->cm_node = NULL;
1735 nes_rem_ref(&nesqp->ibqp);
1736 cm_node->nesqp = NULL;
1737 }
1738
1739 kfree(cm_node);
1740 return 0;
1741 }
1742
1743 /**
1744 * process_options
1745 */
process_options(struct nes_cm_node * cm_node,u8 * optionsloc,u32 optionsize,u32 syn_packet)1746 static int process_options(struct nes_cm_node *cm_node, u8 *optionsloc,
1747 u32 optionsize, u32 syn_packet)
1748 {
1749 u32 tmp;
1750 u32 offset = 0;
1751 union all_known_options *all_options;
1752 char got_mss_option = 0;
1753
1754 while (offset < optionsize) {
1755 all_options = (union all_known_options *)(optionsloc + offset);
1756 switch (all_options->as_base.optionnum) {
1757 case OPTION_NUMBER_END:
1758 offset = optionsize;
1759 break;
1760 case OPTION_NUMBER_NONE:
1761 offset += 1;
1762 continue;
1763 case OPTION_NUMBER_MSS:
1764 nes_debug(NES_DBG_CM, "%s: MSS Length: %d Offset: %d "
1765 "Size: %d\n", __func__,
1766 all_options->as_mss.length, offset, optionsize);
1767 got_mss_option = 1;
1768 if (all_options->as_mss.length != 4) {
1769 return 1;
1770 } else {
1771 tmp = ntohs(all_options->as_mss.mss);
1772 if (tmp > 0 && tmp <
1773 cm_node->tcp_cntxt.mss)
1774 cm_node->tcp_cntxt.mss = tmp;
1775 }
1776 break;
1777 case OPTION_NUMBER_WINDOW_SCALE:
1778 cm_node->tcp_cntxt.snd_wscale =
1779 all_options->as_windowscale.shiftcount;
1780 break;
1781 default:
1782 nes_debug(NES_DBG_CM, "TCP Option not understood: %x\n",
1783 all_options->as_base.optionnum);
1784 break;
1785 }
1786 offset += all_options->as_base.length;
1787 }
1788 if ((!got_mss_option) && (syn_packet))
1789 cm_node->tcp_cntxt.mss = NES_CM_DEFAULT_MSS;
1790 return 0;
1791 }
1792
drop_packet(struct sk_buff * skb)1793 static void drop_packet(struct sk_buff *skb)
1794 {
1795 atomic_inc(&cm_accel_dropped_pkts);
1796 dev_kfree_skb_any(skb);
1797 }
1798
handle_fin_pkt(struct nes_cm_node * cm_node)1799 static void handle_fin_pkt(struct nes_cm_node *cm_node)
1800 {
1801 nes_debug(NES_DBG_CM, "Received FIN, cm_node = %p, state = %u. "
1802 "refcnt=%d\n", cm_node, cm_node->state,
1803 atomic_read(&cm_node->ref_count));
1804 switch (cm_node->state) {
1805 case NES_CM_STATE_SYN_RCVD:
1806 case NES_CM_STATE_SYN_SENT:
1807 case NES_CM_STATE_ESTABLISHED:
1808 case NES_CM_STATE_MPAREJ_RCVD:
1809 cm_node->tcp_cntxt.rcv_nxt++;
1810 cleanup_retrans_entry(cm_node);
1811 cm_node->state = NES_CM_STATE_LAST_ACK;
1812 send_fin(cm_node, NULL);
1813 break;
1814 case NES_CM_STATE_MPAREQ_SENT:
1815 create_event(cm_node, NES_CM_EVENT_ABORTED);
1816 cm_node->tcp_cntxt.rcv_nxt++;
1817 cleanup_retrans_entry(cm_node);
1818 cm_node->state = NES_CM_STATE_CLOSED;
1819 add_ref_cm_node(cm_node);
1820 send_reset(cm_node, NULL);
1821 break;
1822 case NES_CM_STATE_FIN_WAIT1:
1823 cm_node->tcp_cntxt.rcv_nxt++;
1824 cleanup_retrans_entry(cm_node);
1825 cm_node->state = NES_CM_STATE_CLOSING;
1826 send_ack(cm_node, NULL);
1827 /* Wait for ACK as this is simultaneous close..
1828 * After we receive ACK, do not send anything..
1829 * Just rm the node.. Done.. */
1830 break;
1831 case NES_CM_STATE_FIN_WAIT2:
1832 cm_node->tcp_cntxt.rcv_nxt++;
1833 cleanup_retrans_entry(cm_node);
1834 cm_node->state = NES_CM_STATE_TIME_WAIT;
1835 send_ack(cm_node, NULL);
1836 schedule_nes_timer(cm_node, NULL, NES_TIMER_TYPE_CLOSE, 1, 0);
1837 break;
1838 case NES_CM_STATE_TIME_WAIT:
1839 cm_node->tcp_cntxt.rcv_nxt++;
1840 cleanup_retrans_entry(cm_node);
1841 cm_node->state = NES_CM_STATE_CLOSED;
1842 rem_ref_cm_node(cm_node->cm_core, cm_node);
1843 break;
1844 case NES_CM_STATE_TSA:
1845 default:
1846 nes_debug(NES_DBG_CM, "Error Rcvd FIN for node-%p state = %d\n",
1847 cm_node, cm_node->state);
1848 break;
1849 }
1850 }
1851
1852
handle_rst_pkt(struct nes_cm_node * cm_node,struct sk_buff * skb,struct tcphdr * tcph)1853 static void handle_rst_pkt(struct nes_cm_node *cm_node, struct sk_buff *skb,
1854 struct tcphdr *tcph)
1855 {
1856
1857 int reset = 0; /* whether to send reset in case of err.. */
1858 atomic_inc(&cm_resets_recvd);
1859 nes_debug(NES_DBG_CM, "Received Reset, cm_node = %p, state = %u."
1860 " refcnt=%d\n", cm_node, cm_node->state,
1861 atomic_read(&cm_node->ref_count));
1862 cleanup_retrans_entry(cm_node);
1863 switch (cm_node->state) {
1864 case NES_CM_STATE_SYN_SENT:
1865 case NES_CM_STATE_MPAREQ_SENT:
1866 nes_debug(NES_DBG_CM, "%s[%u] create abort for cm_node=%p "
1867 "listener=%p state=%d\n", __func__, __LINE__, cm_node,
1868 cm_node->listener, cm_node->state);
1869 switch (cm_node->mpa_frame_rev) {
1870 case IETF_MPA_V2:
1871 cm_node->mpa_frame_rev = IETF_MPA_V1;
1872 /* send a syn and goto syn sent state */
1873 cm_node->state = NES_CM_STATE_SYN_SENT;
1874 if (send_syn(cm_node, 0, NULL)) {
1875 active_open_err(cm_node, skb, reset);
1876 }
1877 break;
1878 case IETF_MPA_V1:
1879 default:
1880 active_open_err(cm_node, skb, reset);
1881 break;
1882 }
1883 break;
1884 case NES_CM_STATE_MPAREQ_RCVD:
1885 atomic_inc(&cm_node->passive_state);
1886 dev_kfree_skb_any(skb);
1887 break;
1888 case NES_CM_STATE_ESTABLISHED:
1889 case NES_CM_STATE_SYN_RCVD:
1890 case NES_CM_STATE_LISTENING:
1891 nes_debug(NES_DBG_CM, "Bad state %s[%u]\n", __func__, __LINE__);
1892 passive_open_err(cm_node, skb, reset);
1893 break;
1894 case NES_CM_STATE_TSA:
1895 active_open_err(cm_node, skb, reset);
1896 break;
1897 case NES_CM_STATE_CLOSED:
1898 drop_packet(skb);
1899 break;
1900 case NES_CM_STATE_FIN_WAIT2:
1901 case NES_CM_STATE_FIN_WAIT1:
1902 case NES_CM_STATE_LAST_ACK:
1903 cm_node->cm_id->rem_ref(cm_node->cm_id);
1904 case NES_CM_STATE_TIME_WAIT:
1905 cm_node->state = NES_CM_STATE_CLOSED;
1906 rem_ref_cm_node(cm_node->cm_core, cm_node);
1907 drop_packet(skb);
1908 break;
1909 default:
1910 drop_packet(skb);
1911 break;
1912 }
1913 }
1914
1915
handle_rcv_mpa(struct nes_cm_node * cm_node,struct sk_buff * skb)1916 static void handle_rcv_mpa(struct nes_cm_node *cm_node, struct sk_buff *skb)
1917 {
1918 int ret = 0;
1919 int datasize = skb->len;
1920 u8 *dataloc = skb->data;
1921
1922 enum nes_cm_event_type type = NES_CM_EVENT_UNKNOWN;
1923 u32 res_type;
1924
1925 ret = parse_mpa(cm_node, dataloc, &res_type, datasize);
1926 if (ret) {
1927 nes_debug(NES_DBG_CM, "didn't like MPA Request\n");
1928 if (cm_node->state == NES_CM_STATE_MPAREQ_SENT) {
1929 nes_debug(NES_DBG_CM, "%s[%u] create abort for "
1930 "cm_node=%p listener=%p state=%d\n", __func__,
1931 __LINE__, cm_node, cm_node->listener,
1932 cm_node->state);
1933 active_open_err(cm_node, skb, 1);
1934 } else {
1935 passive_open_err(cm_node, skb, 1);
1936 }
1937 return;
1938 }
1939
1940 switch (cm_node->state) {
1941 case NES_CM_STATE_ESTABLISHED:
1942 if (res_type == NES_MPA_REQUEST_REJECT)
1943 /*BIG problem as we are receiving the MPA.. So should
1944 * not be REJECT.. This is Passive Open.. We can
1945 * only receive it Reject for Active Open...*/
1946 WARN_ON(1);
1947 cm_node->state = NES_CM_STATE_MPAREQ_RCVD;
1948 type = NES_CM_EVENT_MPA_REQ;
1949 atomic_set(&cm_node->passive_state,
1950 NES_PASSIVE_STATE_INDICATED);
1951 break;
1952 case NES_CM_STATE_MPAREQ_SENT:
1953 cleanup_retrans_entry(cm_node);
1954 if (res_type == NES_MPA_REQUEST_REJECT) {
1955 type = NES_CM_EVENT_MPA_REJECT;
1956 cm_node->state = NES_CM_STATE_MPAREJ_RCVD;
1957 } else {
1958 type = NES_CM_EVENT_CONNECTED;
1959 cm_node->state = NES_CM_STATE_TSA;
1960 }
1961
1962 break;
1963 default:
1964 WARN_ON(1);
1965 break;
1966 }
1967 dev_kfree_skb_any(skb);
1968 create_event(cm_node, type);
1969 }
1970
indicate_pkt_err(struct nes_cm_node * cm_node,struct sk_buff * skb)1971 static void indicate_pkt_err(struct nes_cm_node *cm_node, struct sk_buff *skb)
1972 {
1973 switch (cm_node->state) {
1974 case NES_CM_STATE_SYN_SENT:
1975 case NES_CM_STATE_MPAREQ_SENT:
1976 nes_debug(NES_DBG_CM, "%s[%u] create abort for cm_node=%p "
1977 "listener=%p state=%d\n", __func__, __LINE__, cm_node,
1978 cm_node->listener, cm_node->state);
1979 active_open_err(cm_node, skb, 1);
1980 break;
1981 case NES_CM_STATE_ESTABLISHED:
1982 case NES_CM_STATE_SYN_RCVD:
1983 passive_open_err(cm_node, skb, 1);
1984 break;
1985 case NES_CM_STATE_TSA:
1986 default:
1987 drop_packet(skb);
1988 }
1989 }
1990
check_syn(struct nes_cm_node * cm_node,struct tcphdr * tcph,struct sk_buff * skb)1991 static int check_syn(struct nes_cm_node *cm_node, struct tcphdr *tcph,
1992 struct sk_buff *skb)
1993 {
1994 int err;
1995
1996 err = ((ntohl(tcph->ack_seq) == cm_node->tcp_cntxt.loc_seq_num)) ? 0 : 1;
1997 if (err)
1998 active_open_err(cm_node, skb, 1);
1999
2000 return err;
2001 }
2002
check_seq(struct nes_cm_node * cm_node,struct tcphdr * tcph,struct sk_buff * skb)2003 static int check_seq(struct nes_cm_node *cm_node, struct tcphdr *tcph,
2004 struct sk_buff *skb)
2005 {
2006 int err = 0;
2007 u32 seq;
2008 u32 ack_seq;
2009 u32 loc_seq_num = cm_node->tcp_cntxt.loc_seq_num;
2010 u32 rcv_nxt = cm_node->tcp_cntxt.rcv_nxt;
2011 u32 rcv_wnd;
2012
2013 seq = ntohl(tcph->seq);
2014 ack_seq = ntohl(tcph->ack_seq);
2015 rcv_wnd = cm_node->tcp_cntxt.rcv_wnd;
2016 if (ack_seq != loc_seq_num)
2017 err = 1;
2018 else if (!between(seq, rcv_nxt, (rcv_nxt + rcv_wnd)))
2019 err = 1;
2020 if (err) {
2021 nes_debug(NES_DBG_CM, "%s[%u] create abort for cm_node=%p "
2022 "listener=%p state=%d\n", __func__, __LINE__, cm_node,
2023 cm_node->listener, cm_node->state);
2024 indicate_pkt_err(cm_node, skb);
2025 nes_debug(NES_DBG_CM, "seq ERROR cm_node =%p seq=0x%08X "
2026 "rcv_nxt=0x%08X rcv_wnd=0x%x\n", cm_node, seq, rcv_nxt,
2027 rcv_wnd);
2028 }
2029 return err;
2030 }
2031
2032 /*
2033 * handle_syn_pkt() is for Passive node. The syn packet is received when a node
2034 * is created with a listener or it may comein as rexmitted packet which in
2035 * that case will be just dropped.
2036 */
handle_syn_pkt(struct nes_cm_node * cm_node,struct sk_buff * skb,struct tcphdr * tcph)2037 static void handle_syn_pkt(struct nes_cm_node *cm_node, struct sk_buff *skb,
2038 struct tcphdr *tcph)
2039 {
2040 int ret;
2041 u32 inc_sequence;
2042 int optionsize;
2043
2044 optionsize = (tcph->doff << 2) - sizeof(struct tcphdr);
2045 skb_trim(skb, 0);
2046 inc_sequence = ntohl(tcph->seq);
2047
2048 switch (cm_node->state) {
2049 case NES_CM_STATE_SYN_SENT:
2050 case NES_CM_STATE_MPAREQ_SENT:
2051 /* Rcvd syn on active open connection*/
2052 active_open_err(cm_node, skb, 1);
2053 break;
2054 case NES_CM_STATE_LISTENING:
2055 /* Passive OPEN */
2056 if (atomic_read(&cm_node->listener->pend_accepts_cnt) >
2057 cm_node->listener->backlog) {
2058 nes_debug(NES_DBG_CM, "drop syn due to backlog "
2059 "pressure \n");
2060 cm_backlog_drops++;
2061 passive_open_err(cm_node, skb, 0);
2062 break;
2063 }
2064 ret = handle_tcp_options(cm_node, tcph, skb, optionsize,
2065 1);
2066 if (ret) {
2067 passive_open_err(cm_node, skb, 0);
2068 /* drop pkt */
2069 break;
2070 }
2071 cm_node->tcp_cntxt.rcv_nxt = inc_sequence + 1;
2072 BUG_ON(cm_node->send_entry);
2073 cm_node->accept_pend = 1;
2074 atomic_inc(&cm_node->listener->pend_accepts_cnt);
2075
2076 cm_node->state = NES_CM_STATE_SYN_RCVD;
2077 send_syn(cm_node, 1, skb);
2078 break;
2079 case NES_CM_STATE_CLOSED:
2080 cleanup_retrans_entry(cm_node);
2081 add_ref_cm_node(cm_node);
2082 send_reset(cm_node, skb);
2083 break;
2084 case NES_CM_STATE_TSA:
2085 case NES_CM_STATE_ESTABLISHED:
2086 case NES_CM_STATE_FIN_WAIT1:
2087 case NES_CM_STATE_FIN_WAIT2:
2088 case NES_CM_STATE_MPAREQ_RCVD:
2089 case NES_CM_STATE_LAST_ACK:
2090 case NES_CM_STATE_CLOSING:
2091 case NES_CM_STATE_UNKNOWN:
2092 default:
2093 drop_packet(skb);
2094 break;
2095 }
2096 }
2097
handle_synack_pkt(struct nes_cm_node * cm_node,struct sk_buff * skb,struct tcphdr * tcph)2098 static void handle_synack_pkt(struct nes_cm_node *cm_node, struct sk_buff *skb,
2099 struct tcphdr *tcph)
2100 {
2101 int ret;
2102 u32 inc_sequence;
2103 int optionsize;
2104
2105 optionsize = (tcph->doff << 2) - sizeof(struct tcphdr);
2106 skb_trim(skb, 0);
2107 inc_sequence = ntohl(tcph->seq);
2108 switch (cm_node->state) {
2109 case NES_CM_STATE_SYN_SENT:
2110 cleanup_retrans_entry(cm_node);
2111 /* active open */
2112 if (check_syn(cm_node, tcph, skb))
2113 return;
2114 cm_node->tcp_cntxt.rem_ack_num = ntohl(tcph->ack_seq);
2115 /* setup options */
2116 ret = handle_tcp_options(cm_node, tcph, skb, optionsize, 0);
2117 if (ret) {
2118 nes_debug(NES_DBG_CM, "cm_node=%p tcp_options failed\n",
2119 cm_node);
2120 break;
2121 }
2122 cleanup_retrans_entry(cm_node);
2123 cm_node->tcp_cntxt.rcv_nxt = inc_sequence + 1;
2124 send_mpa_request(cm_node, skb);
2125 cm_node->state = NES_CM_STATE_MPAREQ_SENT;
2126 break;
2127 case NES_CM_STATE_MPAREQ_RCVD:
2128 /* passive open, so should not be here */
2129 passive_open_err(cm_node, skb, 1);
2130 break;
2131 case NES_CM_STATE_LISTENING:
2132 cm_node->tcp_cntxt.loc_seq_num = ntohl(tcph->ack_seq);
2133 cleanup_retrans_entry(cm_node);
2134 cm_node->state = NES_CM_STATE_CLOSED;
2135 send_reset(cm_node, skb);
2136 break;
2137 case NES_CM_STATE_CLOSED:
2138 cm_node->tcp_cntxt.loc_seq_num = ntohl(tcph->ack_seq);
2139 cleanup_retrans_entry(cm_node);
2140 add_ref_cm_node(cm_node);
2141 send_reset(cm_node, skb);
2142 break;
2143 case NES_CM_STATE_ESTABLISHED:
2144 case NES_CM_STATE_FIN_WAIT1:
2145 case NES_CM_STATE_FIN_WAIT2:
2146 case NES_CM_STATE_LAST_ACK:
2147 case NES_CM_STATE_TSA:
2148 case NES_CM_STATE_CLOSING:
2149 case NES_CM_STATE_UNKNOWN:
2150 case NES_CM_STATE_MPAREQ_SENT:
2151 default:
2152 drop_packet(skb);
2153 break;
2154 }
2155 }
2156
handle_ack_pkt(struct nes_cm_node * cm_node,struct sk_buff * skb,struct tcphdr * tcph)2157 static int handle_ack_pkt(struct nes_cm_node *cm_node, struct sk_buff *skb,
2158 struct tcphdr *tcph)
2159 {
2160 int datasize = 0;
2161 u32 inc_sequence;
2162 int ret = 0;
2163 int optionsize;
2164
2165 optionsize = (tcph->doff << 2) - sizeof(struct tcphdr);
2166
2167 if (check_seq(cm_node, tcph, skb))
2168 return -EINVAL;
2169
2170 skb_pull(skb, tcph->doff << 2);
2171 inc_sequence = ntohl(tcph->seq);
2172 datasize = skb->len;
2173 switch (cm_node->state) {
2174 case NES_CM_STATE_SYN_RCVD:
2175 /* Passive OPEN */
2176 cleanup_retrans_entry(cm_node);
2177 ret = handle_tcp_options(cm_node, tcph, skb, optionsize, 1);
2178 if (ret)
2179 break;
2180 cm_node->tcp_cntxt.rem_ack_num = ntohl(tcph->ack_seq);
2181 cm_node->state = NES_CM_STATE_ESTABLISHED;
2182 if (datasize) {
2183 cm_node->tcp_cntxt.rcv_nxt = inc_sequence + datasize;
2184 nes_get_remote_addr(cm_node);
2185 handle_rcv_mpa(cm_node, skb);
2186 } else { /* rcvd ACK only */
2187 dev_kfree_skb_any(skb);
2188 }
2189 break;
2190 case NES_CM_STATE_ESTABLISHED:
2191 /* Passive OPEN */
2192 cleanup_retrans_entry(cm_node);
2193 if (datasize) {
2194 cm_node->tcp_cntxt.rcv_nxt = inc_sequence + datasize;
2195 handle_rcv_mpa(cm_node, skb);
2196 } else {
2197 drop_packet(skb);
2198 }
2199 break;
2200 case NES_CM_STATE_MPAREQ_SENT:
2201 cm_node->tcp_cntxt.rem_ack_num = ntohl(tcph->ack_seq);
2202 if (datasize) {
2203 cm_node->tcp_cntxt.rcv_nxt = inc_sequence + datasize;
2204 handle_rcv_mpa(cm_node, skb);
2205 } else { /* Could be just an ack pkt.. */
2206 dev_kfree_skb_any(skb);
2207 }
2208 break;
2209 case NES_CM_STATE_LISTENING:
2210 cleanup_retrans_entry(cm_node);
2211 cm_node->state = NES_CM_STATE_CLOSED;
2212 send_reset(cm_node, skb);
2213 break;
2214 case NES_CM_STATE_CLOSED:
2215 cleanup_retrans_entry(cm_node);
2216 add_ref_cm_node(cm_node);
2217 send_reset(cm_node, skb);
2218 break;
2219 case NES_CM_STATE_LAST_ACK:
2220 case NES_CM_STATE_CLOSING:
2221 cleanup_retrans_entry(cm_node);
2222 cm_node->state = NES_CM_STATE_CLOSED;
2223 cm_node->cm_id->rem_ref(cm_node->cm_id);
2224 rem_ref_cm_node(cm_node->cm_core, cm_node);
2225 drop_packet(skb);
2226 break;
2227 case NES_CM_STATE_FIN_WAIT1:
2228 cleanup_retrans_entry(cm_node);
2229 drop_packet(skb);
2230 cm_node->state = NES_CM_STATE_FIN_WAIT2;
2231 break;
2232 case NES_CM_STATE_SYN_SENT:
2233 case NES_CM_STATE_FIN_WAIT2:
2234 case NES_CM_STATE_TSA:
2235 case NES_CM_STATE_MPAREQ_RCVD:
2236 case NES_CM_STATE_UNKNOWN:
2237 default:
2238 cleanup_retrans_entry(cm_node);
2239 drop_packet(skb);
2240 break;
2241 }
2242 return ret;
2243 }
2244
2245
2246
handle_tcp_options(struct nes_cm_node * cm_node,struct tcphdr * tcph,struct sk_buff * skb,int optionsize,int passive)2247 static int handle_tcp_options(struct nes_cm_node *cm_node, struct tcphdr *tcph,
2248 struct sk_buff *skb, int optionsize, int passive)
2249 {
2250 u8 *optionsloc = (u8 *)&tcph[1];
2251
2252 if (optionsize) {
2253 if (process_options(cm_node, optionsloc, optionsize,
2254 (u32)tcph->syn)) {
2255 nes_debug(NES_DBG_CM, "%s: Node %p, Sending RESET\n",
2256 __func__, cm_node);
2257 if (passive)
2258 passive_open_err(cm_node, skb, 1);
2259 else
2260 active_open_err(cm_node, skb, 1);
2261 return 1;
2262 }
2263 }
2264
2265 cm_node->tcp_cntxt.snd_wnd = ntohs(tcph->window) <<
2266 cm_node->tcp_cntxt.snd_wscale;
2267
2268 if (cm_node->tcp_cntxt.snd_wnd > cm_node->tcp_cntxt.max_snd_wnd)
2269 cm_node->tcp_cntxt.max_snd_wnd = cm_node->tcp_cntxt.snd_wnd;
2270 return 0;
2271 }
2272
2273 /*
2274 * active_open_err() will send reset() if flag set..
2275 * It will also send ABORT event.
2276 */
active_open_err(struct nes_cm_node * cm_node,struct sk_buff * skb,int reset)2277 static void active_open_err(struct nes_cm_node *cm_node, struct sk_buff *skb,
2278 int reset)
2279 {
2280 cleanup_retrans_entry(cm_node);
2281 if (reset) {
2282 nes_debug(NES_DBG_CM, "ERROR active err called for cm_node=%p, "
2283 "state=%d\n", cm_node, cm_node->state);
2284 add_ref_cm_node(cm_node);
2285 send_reset(cm_node, skb);
2286 } else {
2287 dev_kfree_skb_any(skb);
2288 }
2289
2290 cm_node->state = NES_CM_STATE_CLOSED;
2291 create_event(cm_node, NES_CM_EVENT_ABORTED);
2292 }
2293
2294 /*
2295 * passive_open_err() will either do a reset() or will free up the skb and
2296 * remove the cm_node.
2297 */
passive_open_err(struct nes_cm_node * cm_node,struct sk_buff * skb,int reset)2298 static void passive_open_err(struct nes_cm_node *cm_node, struct sk_buff *skb,
2299 int reset)
2300 {
2301 cleanup_retrans_entry(cm_node);
2302 cm_node->state = NES_CM_STATE_CLOSED;
2303 if (reset) {
2304 nes_debug(NES_DBG_CM, "passive_open_err sending RST for "
2305 "cm_node=%p state =%d\n", cm_node, cm_node->state);
2306 send_reset(cm_node, skb);
2307 } else {
2308 dev_kfree_skb_any(skb);
2309 rem_ref_cm_node(cm_node->cm_core, cm_node);
2310 }
2311 }
2312
2313 /*
2314 * free_retrans_entry() routines assumes that the retrans_list_lock has
2315 * been acquired before calling.
2316 */
free_retrans_entry(struct nes_cm_node * cm_node)2317 static void free_retrans_entry(struct nes_cm_node *cm_node)
2318 {
2319 struct nes_timer_entry *send_entry;
2320
2321 send_entry = cm_node->send_entry;
2322 if (send_entry) {
2323 cm_node->send_entry = NULL;
2324 dev_kfree_skb_any(send_entry->skb);
2325 kfree(send_entry);
2326 rem_ref_cm_node(cm_node->cm_core, cm_node);
2327 }
2328 }
2329
cleanup_retrans_entry(struct nes_cm_node * cm_node)2330 static void cleanup_retrans_entry(struct nes_cm_node *cm_node)
2331 {
2332 unsigned long flags;
2333
2334 spin_lock_irqsave(&cm_node->retrans_list_lock, flags);
2335 free_retrans_entry(cm_node);
2336 spin_unlock_irqrestore(&cm_node->retrans_list_lock, flags);
2337 }
2338
2339 /**
2340 * process_packet
2341 * Returns skb if to be freed, else it will return NULL if already used..
2342 */
process_packet(struct nes_cm_node * cm_node,struct sk_buff * skb,struct nes_cm_core * cm_core)2343 static void process_packet(struct nes_cm_node *cm_node, struct sk_buff *skb,
2344 struct nes_cm_core *cm_core)
2345 {
2346 enum nes_tcpip_pkt_type pkt_type = NES_PKT_TYPE_UNKNOWN;
2347 struct tcphdr *tcph = tcp_hdr(skb);
2348 u32 fin_set = 0;
2349 int ret = 0;
2350
2351 skb_pull(skb, ip_hdr(skb)->ihl << 2);
2352
2353 nes_debug(NES_DBG_CM, "process_packet: cm_node=%p state =%d syn=%d "
2354 "ack=%d rst=%d fin=%d\n", cm_node, cm_node->state, tcph->syn,
2355 tcph->ack, tcph->rst, tcph->fin);
2356
2357 if (tcph->rst) {
2358 pkt_type = NES_PKT_TYPE_RST;
2359 } else if (tcph->syn) {
2360 pkt_type = NES_PKT_TYPE_SYN;
2361 if (tcph->ack)
2362 pkt_type = NES_PKT_TYPE_SYNACK;
2363 } else if (tcph->ack) {
2364 pkt_type = NES_PKT_TYPE_ACK;
2365 }
2366 if (tcph->fin)
2367 fin_set = 1;
2368
2369 switch (pkt_type) {
2370 case NES_PKT_TYPE_SYN:
2371 handle_syn_pkt(cm_node, skb, tcph);
2372 break;
2373 case NES_PKT_TYPE_SYNACK:
2374 handle_synack_pkt(cm_node, skb, tcph);
2375 break;
2376 case NES_PKT_TYPE_ACK:
2377 ret = handle_ack_pkt(cm_node, skb, tcph);
2378 if (fin_set && !ret)
2379 handle_fin_pkt(cm_node);
2380 break;
2381 case NES_PKT_TYPE_RST:
2382 handle_rst_pkt(cm_node, skb, tcph);
2383 break;
2384 default:
2385 if ((fin_set) && (!check_seq(cm_node, tcph, skb)))
2386 handle_fin_pkt(cm_node);
2387 drop_packet(skb);
2388 break;
2389 }
2390 }
2391
2392 /**
2393 * mini_cm_listen - create a listen node with params
2394 */
mini_cm_listen(struct nes_cm_core * cm_core,struct nes_vnic * nesvnic,struct nes_cm_info * cm_info)2395 static struct nes_cm_listener *mini_cm_listen(struct nes_cm_core *cm_core,
2396 struct nes_vnic *nesvnic, struct nes_cm_info *cm_info)
2397 {
2398 struct nes_cm_listener *listener;
2399 struct iwpm_dev_data pm_reg_msg;
2400 struct iwpm_sa_data pm_msg;
2401 unsigned long flags;
2402 int iwpm_err = 0;
2403
2404 nes_debug(NES_DBG_CM, "Search for 0x%08x : 0x%04x\n",
2405 cm_info->loc_addr, cm_info->loc_port);
2406
2407 /* cannot have multiple matching listeners */
2408 listener = find_listener(cm_core, cm_info->loc_addr, cm_info->loc_port,
2409 NES_CM_LISTENER_EITHER_STATE, 1);
2410
2411 if (listener && listener->listener_state == NES_CM_LISTENER_ACTIVE_STATE) {
2412 /* find automatically incs ref count ??? */
2413 atomic_dec(&listener->ref_count);
2414 nes_debug(NES_DBG_CM, "Not creating listener since it already exists\n");
2415 return NULL;
2416 }
2417
2418 if (!listener) {
2419 nes_form_reg_msg(nesvnic, &pm_reg_msg);
2420 iwpm_err = iwpm_register_pid(&pm_reg_msg, RDMA_NL_NES);
2421 if (iwpm_err) {
2422 nes_debug(NES_DBG_NLMSG,
2423 "Port Mapper reg pid fail (err = %d).\n", iwpm_err);
2424 }
2425 if (iwpm_valid_pid() && !iwpm_err) {
2426 nes_form_pm_msg(cm_info, &pm_msg);
2427 iwpm_err = iwpm_add_mapping(&pm_msg, RDMA_NL_NES);
2428 if (iwpm_err)
2429 nes_debug(NES_DBG_NLMSG,
2430 "Port Mapper query fail (err = %d).\n", iwpm_err);
2431 else
2432 nes_record_pm_msg(cm_info, &pm_msg);
2433 }
2434
2435 /* create a CM listen node (1/2 node to compare incoming traffic to) */
2436 listener = kzalloc(sizeof(*listener), GFP_ATOMIC);
2437 if (!listener) {
2438 nes_debug(NES_DBG_CM, "Not creating listener memory allocation failed\n");
2439 return NULL;
2440 }
2441
2442 listener->loc_addr = cm_info->loc_addr;
2443 listener->loc_port = cm_info->loc_port;
2444 listener->mapped_loc_addr = cm_info->mapped_loc_addr;
2445 listener->mapped_loc_port = cm_info->mapped_loc_port;
2446 listener->reused_node = 0;
2447
2448 atomic_set(&listener->ref_count, 1);
2449 }
2450 /* pasive case */
2451 /* find already inc'ed the ref count */
2452 else {
2453 listener->reused_node = 1;
2454 }
2455
2456 listener->cm_id = cm_info->cm_id;
2457 atomic_set(&listener->pend_accepts_cnt, 0);
2458 listener->cm_core = cm_core;
2459 listener->nesvnic = nesvnic;
2460 atomic_inc(&cm_core->node_cnt);
2461
2462 listener->conn_type = cm_info->conn_type;
2463 listener->backlog = cm_info->backlog;
2464 listener->listener_state = NES_CM_LISTENER_ACTIVE_STATE;
2465
2466 if (!listener->reused_node) {
2467 spin_lock_irqsave(&cm_core->listen_list_lock, flags);
2468 list_add(&listener->list, &cm_core->listen_list.list);
2469 spin_unlock_irqrestore(&cm_core->listen_list_lock, flags);
2470 atomic_inc(&cm_core->listen_node_cnt);
2471 }
2472
2473 nes_debug(NES_DBG_CM, "Api - listen(): addr=0x%08X, port=0x%04x,"
2474 " listener = %p, backlog = %d, cm_id = %p.\n",
2475 cm_info->loc_addr, cm_info->loc_port,
2476 listener, listener->backlog, listener->cm_id);
2477
2478 return listener;
2479 }
2480
2481
2482 /**
2483 * mini_cm_connect - make a connection node with params
2484 */
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)2485 static struct nes_cm_node *mini_cm_connect(struct nes_cm_core *cm_core,
2486 struct nes_vnic *nesvnic, u16 private_data_len,
2487 void *private_data, struct nes_cm_info *cm_info)
2488 {
2489 int ret = 0;
2490 struct nes_cm_node *cm_node;
2491 struct nes_cm_listener *loopbackremotelistener;
2492 struct nes_cm_node *loopbackremotenode;
2493 struct nes_cm_info loopback_cm_info;
2494 u8 *start_buff;
2495
2496 /* create a CM connection node */
2497 cm_node = make_cm_node(cm_core, nesvnic, cm_info, NULL);
2498 if (!cm_node)
2499 return NULL;
2500
2501 /* set our node side to client (active) side */
2502 cm_node->tcp_cntxt.client = 1;
2503 cm_node->tcp_cntxt.rcv_wscale = NES_CM_DEFAULT_RCV_WND_SCALE;
2504
2505 if (cm_info->loc_addr == cm_info->rem_addr) {
2506 loopbackremotelistener = find_listener(cm_core,
2507 cm_node->mapped_loc_addr, cm_node->mapped_rem_port,
2508 NES_CM_LISTENER_ACTIVE_STATE, 0);
2509 if (loopbackremotelistener == NULL) {
2510 create_event(cm_node, NES_CM_EVENT_ABORTED);
2511 } else {
2512 loopback_cm_info = *cm_info;
2513 loopback_cm_info.loc_port = cm_info->rem_port;
2514 loopback_cm_info.rem_port = cm_info->loc_port;
2515 loopback_cm_info.mapped_loc_port =
2516 cm_info->mapped_rem_port;
2517 loopback_cm_info.mapped_rem_port =
2518 cm_info->mapped_loc_port;
2519 loopback_cm_info.cm_id = loopbackremotelistener->cm_id;
2520 loopbackremotenode = make_cm_node(cm_core, nesvnic,
2521 &loopback_cm_info, loopbackremotelistener);
2522 if (!loopbackremotenode) {
2523 rem_ref_cm_node(cm_node->cm_core, cm_node);
2524 return NULL;
2525 }
2526 atomic_inc(&cm_loopbacks);
2527 loopbackremotenode->loopbackpartner = cm_node;
2528 loopbackremotenode->tcp_cntxt.rcv_wscale =
2529 NES_CM_DEFAULT_RCV_WND_SCALE;
2530 cm_node->loopbackpartner = loopbackremotenode;
2531 memcpy(loopbackremotenode->mpa_frame_buf, private_data,
2532 private_data_len);
2533 loopbackremotenode->mpa_frame_size = private_data_len;
2534
2535 /* we are done handling this state. */
2536 /* set node to a TSA state */
2537 cm_node->state = NES_CM_STATE_TSA;
2538 cm_node->tcp_cntxt.rcv_nxt =
2539 loopbackremotenode->tcp_cntxt.loc_seq_num;
2540 loopbackremotenode->tcp_cntxt.rcv_nxt =
2541 cm_node->tcp_cntxt.loc_seq_num;
2542 cm_node->tcp_cntxt.max_snd_wnd =
2543 loopbackremotenode->tcp_cntxt.rcv_wnd;
2544 loopbackremotenode->tcp_cntxt.max_snd_wnd =
2545 cm_node->tcp_cntxt.rcv_wnd;
2546 cm_node->tcp_cntxt.snd_wnd =
2547 loopbackremotenode->tcp_cntxt.rcv_wnd;
2548 loopbackremotenode->tcp_cntxt.snd_wnd =
2549 cm_node->tcp_cntxt.rcv_wnd;
2550 cm_node->tcp_cntxt.snd_wscale =
2551 loopbackremotenode->tcp_cntxt.rcv_wscale;
2552 loopbackremotenode->tcp_cntxt.snd_wscale =
2553 cm_node->tcp_cntxt.rcv_wscale;
2554 loopbackremotenode->state = NES_CM_STATE_MPAREQ_RCVD;
2555 create_event(loopbackremotenode, NES_CM_EVENT_MPA_REQ);
2556 }
2557 return cm_node;
2558 }
2559
2560 start_buff = &cm_node->mpa_frame_buf[0] + sizeof(struct ietf_mpa_v2);
2561 cm_node->mpa_frame_size = private_data_len;
2562
2563 memcpy(start_buff, private_data, private_data_len);
2564
2565 /* send a syn and goto syn sent state */
2566 cm_node->state = NES_CM_STATE_SYN_SENT;
2567 ret = send_syn(cm_node, 0, NULL);
2568
2569 if (ret) {
2570 /* error in sending the syn free up the cm_node struct */
2571 nes_debug(NES_DBG_CM, "Api - connect() FAILED: dest "
2572 "addr=0x%08X, port=0x%04x, cm_node=%p, cm_id = %p.\n",
2573 cm_node->rem_addr, cm_node->rem_port, cm_node,
2574 cm_node->cm_id);
2575 rem_ref_cm_node(cm_node->cm_core, cm_node);
2576 cm_node = NULL;
2577 }
2578
2579 if (cm_node) {
2580 nes_debug(NES_DBG_CM, "Api - connect(): dest addr=0x%08X,"
2581 "port=0x%04x, cm_node=%p, cm_id = %p.\n",
2582 cm_node->rem_addr, cm_node->rem_port, cm_node,
2583 cm_node->cm_id);
2584 }
2585
2586 return cm_node;
2587 }
2588
2589
2590 /**
2591 * mini_cm_accept - accept a connection
2592 * This function is never called
2593 */
mini_cm_accept(struct nes_cm_core * cm_core,struct nes_cm_node * cm_node)2594 static int mini_cm_accept(struct nes_cm_core *cm_core, struct nes_cm_node *cm_node)
2595 {
2596 return 0;
2597 }
2598
2599
2600 /**
2601 * mini_cm_reject - reject and teardown a connection
2602 */
mini_cm_reject(struct nes_cm_core * cm_core,struct nes_cm_node * cm_node)2603 static int mini_cm_reject(struct nes_cm_core *cm_core, struct nes_cm_node *cm_node)
2604 {
2605 int ret = 0;
2606 int err = 0;
2607 int passive_state;
2608 struct nes_cm_event event;
2609 struct iw_cm_id *cm_id = cm_node->cm_id;
2610 struct nes_cm_node *loopback = cm_node->loopbackpartner;
2611
2612 nes_debug(NES_DBG_CM, "%s cm_node=%p type=%d state=%d\n",
2613 __func__, cm_node, cm_node->tcp_cntxt.client, cm_node->state);
2614
2615 if (cm_node->tcp_cntxt.client)
2616 return ret;
2617 cleanup_retrans_entry(cm_node);
2618
2619 if (!loopback) {
2620 passive_state = atomic_add_return(1, &cm_node->passive_state);
2621 if (passive_state == NES_SEND_RESET_EVENT) {
2622 cm_node->state = NES_CM_STATE_CLOSED;
2623 rem_ref_cm_node(cm_core, cm_node);
2624 } else {
2625 if (cm_node->state == NES_CM_STATE_LISTENER_DESTROYED) {
2626 rem_ref_cm_node(cm_core, cm_node);
2627 } else {
2628 ret = send_mpa_reject(cm_node);
2629 if (ret) {
2630 cm_node->state = NES_CM_STATE_CLOSED;
2631 err = send_reset(cm_node, NULL);
2632 if (err)
2633 WARN_ON(1);
2634 } else {
2635 cm_id->add_ref(cm_id);
2636 }
2637 }
2638 }
2639 } else {
2640 cm_node->cm_id = NULL;
2641 if (cm_node->state == NES_CM_STATE_LISTENER_DESTROYED) {
2642 rem_ref_cm_node(cm_core, cm_node);
2643 rem_ref_cm_node(cm_core, loopback);
2644 } else {
2645 event.cm_node = loopback;
2646 event.cm_info.rem_addr = loopback->rem_addr;
2647 event.cm_info.loc_addr = loopback->loc_addr;
2648 event.cm_info.rem_port = loopback->rem_port;
2649 event.cm_info.loc_port = loopback->loc_port;
2650 event.cm_info.cm_id = loopback->cm_id;
2651 cm_event_mpa_reject(&event);
2652 rem_ref_cm_node(cm_core, cm_node);
2653 loopback->state = NES_CM_STATE_CLOSING;
2654
2655 cm_id = loopback->cm_id;
2656 rem_ref_cm_node(cm_core, loopback);
2657 cm_id->rem_ref(cm_id);
2658 }
2659 }
2660
2661 return ret;
2662 }
2663
2664
2665 /**
2666 * mini_cm_close
2667 */
mini_cm_close(struct nes_cm_core * cm_core,struct nes_cm_node * cm_node)2668 static int mini_cm_close(struct nes_cm_core *cm_core, struct nes_cm_node *cm_node)
2669 {
2670 int ret = 0;
2671
2672 if (!cm_core || !cm_node)
2673 return -EINVAL;
2674
2675 switch (cm_node->state) {
2676 case NES_CM_STATE_SYN_RCVD:
2677 case NES_CM_STATE_SYN_SENT:
2678 case NES_CM_STATE_ONE_SIDE_ESTABLISHED:
2679 case NES_CM_STATE_ESTABLISHED:
2680 case NES_CM_STATE_ACCEPTING:
2681 case NES_CM_STATE_MPAREQ_SENT:
2682 case NES_CM_STATE_MPAREQ_RCVD:
2683 cleanup_retrans_entry(cm_node);
2684 send_reset(cm_node, NULL);
2685 break;
2686 case NES_CM_STATE_CLOSE_WAIT:
2687 cm_node->state = NES_CM_STATE_LAST_ACK;
2688 send_fin(cm_node, NULL);
2689 break;
2690 case NES_CM_STATE_FIN_WAIT1:
2691 case NES_CM_STATE_FIN_WAIT2:
2692 case NES_CM_STATE_LAST_ACK:
2693 case NES_CM_STATE_TIME_WAIT:
2694 case NES_CM_STATE_CLOSING:
2695 ret = -1;
2696 break;
2697 case NES_CM_STATE_LISTENING:
2698 cleanup_retrans_entry(cm_node);
2699 send_reset(cm_node, NULL);
2700 break;
2701 case NES_CM_STATE_MPAREJ_RCVD:
2702 case NES_CM_STATE_UNKNOWN:
2703 case NES_CM_STATE_INITED:
2704 case NES_CM_STATE_CLOSED:
2705 case NES_CM_STATE_LISTENER_DESTROYED:
2706 ret = rem_ref_cm_node(cm_core, cm_node);
2707 break;
2708 case NES_CM_STATE_TSA:
2709 if (cm_node->send_entry)
2710 printk(KERN_ERR "ERROR Close got called from STATE_TSA "
2711 "send_entry=%p\n", cm_node->send_entry);
2712 ret = rem_ref_cm_node(cm_core, cm_node);
2713 break;
2714 }
2715 return ret;
2716 }
2717
2718
2719 /**
2720 * recv_pkt - recv an ETHERNET packet, and process it through CM
2721 * node state machine
2722 */
mini_cm_recv_pkt(struct nes_cm_core * cm_core,struct nes_vnic * nesvnic,struct sk_buff * skb)2723 static int mini_cm_recv_pkt(struct nes_cm_core *cm_core,
2724 struct nes_vnic *nesvnic, struct sk_buff *skb)
2725 {
2726 struct nes_cm_node *cm_node = NULL;
2727 struct nes_cm_listener *listener = NULL;
2728 struct iphdr *iph;
2729 struct tcphdr *tcph;
2730 struct nes_cm_info nfo;
2731 int skb_handled = 1;
2732 __be32 tmp_daddr, tmp_saddr;
2733
2734 if (!skb)
2735 return 0;
2736 if (skb->len < sizeof(struct iphdr) + sizeof(struct tcphdr))
2737 return 0;
2738
2739 iph = (struct iphdr *)skb->data;
2740 tcph = (struct tcphdr *)(skb->data + sizeof(struct iphdr));
2741
2742 nfo.loc_addr = ntohl(iph->daddr);
2743 nfo.loc_port = ntohs(tcph->dest);
2744 nfo.rem_addr = ntohl(iph->saddr);
2745 nfo.rem_port = ntohs(tcph->source);
2746
2747 /* If port mapper is available these should be mapped address info */
2748 nfo.mapped_loc_addr = ntohl(iph->daddr);
2749 nfo.mapped_loc_port = ntohs(tcph->dest);
2750 nfo.mapped_rem_addr = ntohl(iph->saddr);
2751 nfo.mapped_rem_port = ntohs(tcph->source);
2752
2753 tmp_daddr = cpu_to_be32(iph->daddr);
2754 tmp_saddr = cpu_to_be32(iph->saddr);
2755
2756 nes_debug(NES_DBG_CM, "Received packet: dest=%pI4:0x%04X src=%pI4:0x%04X\n",
2757 &tmp_daddr, tcph->dest, &tmp_saddr, tcph->source);
2758
2759 do {
2760 cm_node = find_node(cm_core,
2761 nfo.mapped_rem_port, nfo.mapped_rem_addr,
2762 nfo.mapped_loc_port, nfo.mapped_loc_addr);
2763
2764 if (!cm_node) {
2765 /* Only type of packet accepted are for */
2766 /* the PASSIVE open (syn only) */
2767 if ((!tcph->syn) || (tcph->ack)) {
2768 skb_handled = 0;
2769 break;
2770 }
2771 listener = find_listener(cm_core, nfo.mapped_loc_addr,
2772 nfo.mapped_loc_port,
2773 NES_CM_LISTENER_ACTIVE_STATE, 0);
2774 if (!listener) {
2775 nfo.cm_id = NULL;
2776 nfo.conn_type = 0;
2777 nes_debug(NES_DBG_CM, "Unable to find listener for the pkt\n");
2778 skb_handled = 0;
2779 break;
2780 }
2781 nfo.cm_id = listener->cm_id;
2782 nfo.conn_type = listener->conn_type;
2783 cm_node = make_cm_node(cm_core, nesvnic, &nfo,
2784 listener);
2785 if (!cm_node) {
2786 nes_debug(NES_DBG_CM, "Unable to allocate "
2787 "node\n");
2788 cm_packets_dropped++;
2789 atomic_dec(&listener->ref_count);
2790 dev_kfree_skb_any(skb);
2791 break;
2792 }
2793 if (!tcph->rst && !tcph->fin) {
2794 cm_node->state = NES_CM_STATE_LISTENING;
2795 } else {
2796 cm_packets_dropped++;
2797 rem_ref_cm_node(cm_core, cm_node);
2798 dev_kfree_skb_any(skb);
2799 break;
2800 }
2801 add_ref_cm_node(cm_node);
2802 } else if (cm_node->state == NES_CM_STATE_TSA) {
2803 if (cm_node->nesqp->pau_mode)
2804 nes_queue_mgt_skbs(skb, nesvnic, cm_node->nesqp);
2805 else {
2806 rem_ref_cm_node(cm_core, cm_node);
2807 atomic_inc(&cm_accel_dropped_pkts);
2808 dev_kfree_skb_any(skb);
2809 }
2810 break;
2811 }
2812 skb_reset_network_header(skb);
2813 skb_set_transport_header(skb, sizeof(*tcph));
2814 skb->len = ntohs(iph->tot_len);
2815 process_packet(cm_node, skb, cm_core);
2816 rem_ref_cm_node(cm_core, cm_node);
2817 } while (0);
2818 return skb_handled;
2819 }
2820
2821
2822 /**
2823 * nes_cm_alloc_core - allocate a top level instance of a cm core
2824 */
nes_cm_alloc_core(void)2825 static struct nes_cm_core *nes_cm_alloc_core(void)
2826 {
2827 struct nes_cm_core *cm_core;
2828
2829 /* setup the CM core */
2830 /* alloc top level core control structure */
2831 cm_core = kzalloc(sizeof(*cm_core), GFP_KERNEL);
2832 if (!cm_core)
2833 return NULL;
2834
2835 INIT_LIST_HEAD(&cm_core->connected_nodes);
2836 init_timer(&cm_core->tcp_timer);
2837 cm_core->tcp_timer.function = nes_cm_timer_tick;
2838
2839 cm_core->mtu = NES_CM_DEFAULT_MTU;
2840 cm_core->state = NES_CM_STATE_INITED;
2841 cm_core->free_tx_pkt_max = NES_CM_DEFAULT_FREE_PKTS;
2842
2843 atomic_set(&cm_core->events_posted, 0);
2844
2845 cm_core->api = &nes_cm_api;
2846
2847 spin_lock_init(&cm_core->ht_lock);
2848 spin_lock_init(&cm_core->listen_list_lock);
2849
2850 INIT_LIST_HEAD(&cm_core->listen_list.list);
2851
2852 nes_debug(NES_DBG_CM, "Init CM Core completed -- cm_core=%p\n", cm_core);
2853
2854 nes_debug(NES_DBG_CM, "Enable QUEUE EVENTS\n");
2855 cm_core->event_wq = create_singlethread_workqueue("nesewq");
2856 cm_core->post_event = nes_cm_post_event;
2857 nes_debug(NES_DBG_CM, "Enable QUEUE DISCONNECTS\n");
2858 cm_core->disconn_wq = create_singlethread_workqueue("nesdwq");
2859
2860 print_core(cm_core);
2861 return cm_core;
2862 }
2863
2864
2865 /**
2866 * mini_cm_dealloc_core - deallocate a top level instance of a cm core
2867 */
mini_cm_dealloc_core(struct nes_cm_core * cm_core)2868 static int mini_cm_dealloc_core(struct nes_cm_core *cm_core)
2869 {
2870 nes_debug(NES_DBG_CM, "De-Alloc CM Core (%p)\n", cm_core);
2871
2872 if (!cm_core)
2873 return -EINVAL;
2874
2875 barrier();
2876
2877 if (timer_pending(&cm_core->tcp_timer))
2878 del_timer(&cm_core->tcp_timer);
2879
2880 destroy_workqueue(cm_core->event_wq);
2881 destroy_workqueue(cm_core->disconn_wq);
2882 nes_debug(NES_DBG_CM, "\n");
2883 kfree(cm_core);
2884
2885 return 0;
2886 }
2887
2888
2889 /**
2890 * mini_cm_get
2891 */
mini_cm_get(struct nes_cm_core * cm_core)2892 static int mini_cm_get(struct nes_cm_core *cm_core)
2893 {
2894 return cm_core->state;
2895 }
2896
2897
2898 /**
2899 * mini_cm_set
2900 */
mini_cm_set(struct nes_cm_core * cm_core,u32 type,u32 value)2901 static int mini_cm_set(struct nes_cm_core *cm_core, u32 type, u32 value)
2902 {
2903 int ret = 0;
2904
2905 switch (type) {
2906 case NES_CM_SET_PKT_SIZE:
2907 cm_core->mtu = value;
2908 break;
2909 case NES_CM_SET_FREE_PKT_Q_SIZE:
2910 cm_core->free_tx_pkt_max = value;
2911 break;
2912 default:
2913 /* unknown set option */
2914 ret = -EINVAL;
2915 }
2916
2917 return ret;
2918 }
2919
2920
2921 /**
2922 * nes_cm_init_tsa_conn setup HW; MPA frames must be
2923 * successfully exchanged when this is called
2924 */
nes_cm_init_tsa_conn(struct nes_qp * nesqp,struct nes_cm_node * cm_node)2925 static int nes_cm_init_tsa_conn(struct nes_qp *nesqp, struct nes_cm_node *cm_node)
2926 {
2927 int ret = 0;
2928
2929 if (!nesqp)
2930 return -EINVAL;
2931
2932 nesqp->nesqp_context->misc |= cpu_to_le32(NES_QPCONTEXT_MISC_IPV4 |
2933 NES_QPCONTEXT_MISC_NO_NAGLE | NES_QPCONTEXT_MISC_DO_NOT_FRAG |
2934 NES_QPCONTEXT_MISC_DROS);
2935
2936 if (cm_node->tcp_cntxt.snd_wscale || cm_node->tcp_cntxt.rcv_wscale)
2937 nesqp->nesqp_context->misc |= cpu_to_le32(NES_QPCONTEXT_MISC_WSCALE);
2938
2939 nesqp->nesqp_context->misc2 |= cpu_to_le32(64 << NES_QPCONTEXT_MISC2_TTL_SHIFT);
2940
2941 nesqp->nesqp_context->mss |= cpu_to_le32(((u32)cm_node->tcp_cntxt.mss) << 16);
2942
2943 nesqp->nesqp_context->tcp_state_flow_label |= cpu_to_le32(
2944 (u32)NES_QPCONTEXT_TCPSTATE_EST << NES_QPCONTEXT_TCPFLOW_TCP_STATE_SHIFT);
2945
2946 nesqp->nesqp_context->pd_index_wscale |= cpu_to_le32(
2947 (cm_node->tcp_cntxt.snd_wscale << NES_QPCONTEXT_PDWSCALE_SND_WSCALE_SHIFT) &
2948 NES_QPCONTEXT_PDWSCALE_SND_WSCALE_MASK);
2949
2950 nesqp->nesqp_context->pd_index_wscale |= cpu_to_le32(
2951 (cm_node->tcp_cntxt.rcv_wscale << NES_QPCONTEXT_PDWSCALE_RCV_WSCALE_SHIFT) &
2952 NES_QPCONTEXT_PDWSCALE_RCV_WSCALE_MASK);
2953
2954 nesqp->nesqp_context->keepalive = cpu_to_le32(0x80);
2955 nesqp->nesqp_context->ts_recent = 0;
2956 nesqp->nesqp_context->ts_age = 0;
2957 nesqp->nesqp_context->snd_nxt = cpu_to_le32(cm_node->tcp_cntxt.loc_seq_num);
2958 nesqp->nesqp_context->snd_wnd = cpu_to_le32(cm_node->tcp_cntxt.snd_wnd);
2959 nesqp->nesqp_context->rcv_nxt = cpu_to_le32(cm_node->tcp_cntxt.rcv_nxt);
2960 nesqp->nesqp_context->rcv_wnd = cpu_to_le32(cm_node->tcp_cntxt.rcv_wnd <<
2961 cm_node->tcp_cntxt.rcv_wscale);
2962 nesqp->nesqp_context->snd_max = cpu_to_le32(cm_node->tcp_cntxt.loc_seq_num);
2963 nesqp->nesqp_context->snd_una = cpu_to_le32(cm_node->tcp_cntxt.loc_seq_num);
2964 nesqp->nesqp_context->srtt = 0;
2965 nesqp->nesqp_context->rttvar = cpu_to_le32(0x6);
2966 nesqp->nesqp_context->ssthresh = cpu_to_le32(0x3FFFC000);
2967 nesqp->nesqp_context->cwnd = cpu_to_le32(2 * cm_node->tcp_cntxt.mss);
2968 nesqp->nesqp_context->snd_wl1 = cpu_to_le32(cm_node->tcp_cntxt.rcv_nxt);
2969 nesqp->nesqp_context->snd_wl2 = cpu_to_le32(cm_node->tcp_cntxt.loc_seq_num);
2970 nesqp->nesqp_context->max_snd_wnd = cpu_to_le32(cm_node->tcp_cntxt.max_snd_wnd);
2971
2972 nes_debug(NES_DBG_CM, "QP%u: rcv_nxt = 0x%08X, snd_nxt = 0x%08X,"
2973 " Setting MSS to %u, PDWscale = 0x%08X, rcv_wnd = %u, context misc = 0x%08X.\n",
2974 nesqp->hwqp.qp_id, le32_to_cpu(nesqp->nesqp_context->rcv_nxt),
2975 le32_to_cpu(nesqp->nesqp_context->snd_nxt),
2976 cm_node->tcp_cntxt.mss, le32_to_cpu(nesqp->nesqp_context->pd_index_wscale),
2977 le32_to_cpu(nesqp->nesqp_context->rcv_wnd),
2978 le32_to_cpu(nesqp->nesqp_context->misc));
2979 nes_debug(NES_DBG_CM, " snd_wnd = 0x%08X.\n", le32_to_cpu(nesqp->nesqp_context->snd_wnd));
2980 nes_debug(NES_DBG_CM, " snd_cwnd = 0x%08X.\n", le32_to_cpu(nesqp->nesqp_context->cwnd));
2981 nes_debug(NES_DBG_CM, " max_swnd = 0x%08X.\n", le32_to_cpu(nesqp->nesqp_context->max_snd_wnd));
2982
2983 nes_debug(NES_DBG_CM, "Change cm_node state to TSA\n");
2984 cm_node->state = NES_CM_STATE_TSA;
2985
2986 return ret;
2987 }
2988
2989
2990 /**
2991 * nes_cm_disconn
2992 */
nes_cm_disconn(struct nes_qp * nesqp)2993 int nes_cm_disconn(struct nes_qp *nesqp)
2994 {
2995 struct disconn_work *work;
2996
2997 work = kzalloc(sizeof *work, GFP_ATOMIC);
2998 if (!work)
2999 return -ENOMEM; /* Timer will clean up */
3000
3001 nes_add_ref(&nesqp->ibqp);
3002 work->nesqp = nesqp;
3003 INIT_WORK(&work->work, nes_disconnect_worker);
3004 queue_work(g_cm_core->disconn_wq, &work->work);
3005 return 0;
3006 }
3007
3008
3009 /**
3010 * nes_disconnect_worker
3011 */
nes_disconnect_worker(struct work_struct * work)3012 static void nes_disconnect_worker(struct work_struct *work)
3013 {
3014 struct disconn_work *dwork = container_of(work, struct disconn_work, work);
3015 struct nes_qp *nesqp = dwork->nesqp;
3016
3017 kfree(dwork);
3018 nes_debug(NES_DBG_CM, "processing AEQE id 0x%04X for QP%u.\n",
3019 nesqp->last_aeq, nesqp->hwqp.qp_id);
3020 nes_cm_disconn_true(nesqp);
3021 nes_rem_ref(&nesqp->ibqp);
3022 }
3023
3024
3025 /**
3026 * nes_cm_disconn_true
3027 */
nes_cm_disconn_true(struct nes_qp * nesqp)3028 static int nes_cm_disconn_true(struct nes_qp *nesqp)
3029 {
3030 unsigned long flags;
3031 int ret = 0;
3032 struct iw_cm_id *cm_id;
3033 struct iw_cm_event cm_event;
3034 struct nes_vnic *nesvnic;
3035 u16 last_ae;
3036 u8 original_hw_tcp_state;
3037 u8 original_ibqp_state;
3038 int disconn_status = 0;
3039 int issue_disconn = 0;
3040 int issue_close = 0;
3041 int issue_flush = 0;
3042 u32 flush_q = NES_CQP_FLUSH_RQ;
3043 struct ib_event ibevent;
3044
3045 if (!nesqp) {
3046 nes_debug(NES_DBG_CM, "disconnect_worker nesqp is NULL\n");
3047 return -1;
3048 }
3049
3050 spin_lock_irqsave(&nesqp->lock, flags);
3051 cm_id = nesqp->cm_id;
3052 /* make sure we havent already closed this connection */
3053 if (!cm_id) {
3054 nes_debug(NES_DBG_CM, "QP%u disconnect_worker cmid is NULL\n",
3055 nesqp->hwqp.qp_id);
3056 spin_unlock_irqrestore(&nesqp->lock, flags);
3057 return -1;
3058 }
3059
3060 nesvnic = to_nesvnic(nesqp->ibqp.device);
3061 nes_debug(NES_DBG_CM, "Disconnecting QP%u\n", nesqp->hwqp.qp_id);
3062
3063 original_hw_tcp_state = nesqp->hw_tcp_state;
3064 original_ibqp_state = nesqp->ibqp_state;
3065 last_ae = nesqp->last_aeq;
3066
3067 if (nesqp->term_flags) {
3068 issue_disconn = 1;
3069 issue_close = 1;
3070 nesqp->cm_id = NULL;
3071 del_timer(&nesqp->terminate_timer);
3072 if (nesqp->flush_issued == 0) {
3073 nesqp->flush_issued = 1;
3074 issue_flush = 1;
3075 }
3076 } else if ((original_hw_tcp_state == NES_AEQE_TCP_STATE_CLOSE_WAIT) ||
3077 ((original_ibqp_state == IB_QPS_RTS) &&
3078 (last_ae == NES_AEQE_AEID_LLP_CONNECTION_RESET))) {
3079 issue_disconn = 1;
3080 if (last_ae == NES_AEQE_AEID_LLP_CONNECTION_RESET)
3081 disconn_status = -ECONNRESET;
3082 }
3083
3084 if (((original_hw_tcp_state == NES_AEQE_TCP_STATE_CLOSED) ||
3085 (original_hw_tcp_state == NES_AEQE_TCP_STATE_TIME_WAIT) ||
3086 (last_ae == NES_AEQE_AEID_RDMAP_ROE_BAD_LLP_CLOSE) ||
3087 (last_ae == NES_AEQE_AEID_LLP_CONNECTION_RESET))) {
3088 issue_close = 1;
3089 nesqp->cm_id = NULL;
3090 if (nesqp->flush_issued == 0) {
3091 nesqp->flush_issued = 1;
3092 issue_flush = 1;
3093 }
3094 }
3095
3096 spin_unlock_irqrestore(&nesqp->lock, flags);
3097
3098 if ((issue_flush) && (nesqp->destroyed == 0)) {
3099 /* Flush the queue(s) */
3100 if (nesqp->hw_iwarp_state >= NES_AEQE_IWARP_STATE_TERMINATE)
3101 flush_q |= NES_CQP_FLUSH_SQ;
3102 flush_wqes(nesvnic->nesdev, nesqp, flush_q, 1);
3103
3104 if (nesqp->term_flags) {
3105 ibevent.device = nesqp->ibqp.device;
3106 ibevent.event = nesqp->terminate_eventtype;
3107 ibevent.element.qp = &nesqp->ibqp;
3108 if (nesqp->ibqp.event_handler)
3109 nesqp->ibqp.event_handler(&ibevent, nesqp->ibqp.qp_context);
3110 }
3111 }
3112
3113 if ((cm_id) && (cm_id->event_handler)) {
3114 if (issue_disconn) {
3115 atomic_inc(&cm_disconnects);
3116 cm_event.event = IW_CM_EVENT_DISCONNECT;
3117 cm_event.status = disconn_status;
3118 cm_event.local_addr = cm_id->local_addr;
3119 cm_event.remote_addr = cm_id->remote_addr;
3120 cm_event.private_data = NULL;
3121 cm_event.private_data_len = 0;
3122
3123 nes_debug(NES_DBG_CM, "Generating a CM Disconnect Event"
3124 " for QP%u, SQ Head = %u, SQ Tail = %u. "
3125 "cm_id = %p, refcount = %u.\n",
3126 nesqp->hwqp.qp_id, nesqp->hwqp.sq_head,
3127 nesqp->hwqp.sq_tail, cm_id,
3128 atomic_read(&nesqp->refcount));
3129
3130 ret = cm_id->event_handler(cm_id, &cm_event);
3131 if (ret)
3132 nes_debug(NES_DBG_CM, "OFA CM event_handler "
3133 "returned, ret=%d\n", ret);
3134 }
3135
3136 if (issue_close) {
3137 atomic_inc(&cm_closes);
3138 nes_disconnect(nesqp, 1);
3139
3140 cm_id->provider_data = nesqp;
3141 /* Send up the close complete event */
3142 cm_event.event = IW_CM_EVENT_CLOSE;
3143 cm_event.status = 0;
3144 cm_event.provider_data = cm_id->provider_data;
3145 cm_event.local_addr = cm_id->local_addr;
3146 cm_event.remote_addr = cm_id->remote_addr;
3147 cm_event.private_data = NULL;
3148 cm_event.private_data_len = 0;
3149
3150 ret = cm_id->event_handler(cm_id, &cm_event);
3151 if (ret)
3152 nes_debug(NES_DBG_CM, "OFA CM event_handler returned, ret=%d\n", ret);
3153
3154 cm_id->rem_ref(cm_id);
3155 }
3156 }
3157
3158 return 0;
3159 }
3160
3161
3162 /**
3163 * nes_disconnect
3164 */
nes_disconnect(struct nes_qp * nesqp,int abrupt)3165 static int nes_disconnect(struct nes_qp *nesqp, int abrupt)
3166 {
3167 int ret = 0;
3168 struct nes_vnic *nesvnic;
3169 struct nes_device *nesdev;
3170 struct nes_ib_device *nesibdev;
3171
3172 nesvnic = to_nesvnic(nesqp->ibqp.device);
3173 if (!nesvnic)
3174 return -EINVAL;
3175
3176 nesdev = nesvnic->nesdev;
3177 nesibdev = nesvnic->nesibdev;
3178
3179 nes_debug(NES_DBG_CM, "netdev refcnt = %u.\n",
3180 netdev_refcnt_read(nesvnic->netdev));
3181
3182 if (nesqp->active_conn) {
3183
3184 /* indicate this connection is NOT active */
3185 nesqp->active_conn = 0;
3186 } else {
3187 /* Need to free the Last Streaming Mode Message */
3188 if (nesqp->ietf_frame) {
3189 if (nesqp->lsmm_mr)
3190 nesibdev->ibdev.dereg_mr(nesqp->lsmm_mr);
3191 pci_free_consistent(nesdev->pcidev,
3192 nesqp->private_data_len + nesqp->ietf_frame_size,
3193 nesqp->ietf_frame, nesqp->ietf_frame_pbase);
3194 }
3195 }
3196
3197 /* close the CM node down if it is still active */
3198 if (nesqp->cm_node) {
3199 nes_debug(NES_DBG_CM, "Call close API\n");
3200
3201 g_cm_core->api->close(g_cm_core, nesqp->cm_node);
3202 }
3203
3204 return ret;
3205 }
3206
3207
3208 /**
3209 * nes_accept
3210 */
nes_accept(struct iw_cm_id * cm_id,struct iw_cm_conn_param * conn_param)3211 int nes_accept(struct iw_cm_id *cm_id, struct iw_cm_conn_param *conn_param)
3212 {
3213 u64 u64temp;
3214 struct ib_qp *ibqp;
3215 struct nes_qp *nesqp;
3216 struct nes_vnic *nesvnic;
3217 struct nes_device *nesdev;
3218 struct nes_cm_node *cm_node;
3219 struct nes_adapter *adapter;
3220 struct ib_qp_attr attr;
3221 struct iw_cm_event cm_event;
3222 struct nes_hw_qp_wqe *wqe;
3223 struct nes_v4_quad nes_quad;
3224 u32 crc_value;
3225 int ret;
3226 int passive_state;
3227 struct nes_ib_device *nesibdev;
3228 struct ib_mr *ibmr = NULL;
3229 struct ib_phys_buf ibphysbuf;
3230 struct nes_pd *nespd;
3231 u64 tagged_offset;
3232 u8 mpa_frame_offset = 0;
3233 struct ietf_mpa_v2 *mpa_v2_frame;
3234 u8 start_addr = 0;
3235 u8 *start_ptr = &start_addr;
3236 u8 **start_buff = &start_ptr;
3237 u16 buff_len = 0;
3238 struct sockaddr_in *laddr = (struct sockaddr_in *)&cm_id->local_addr;
3239 struct sockaddr_in *raddr = (struct sockaddr_in *)&cm_id->remote_addr;
3240
3241 ibqp = nes_get_qp(cm_id->device, conn_param->qpn);
3242 if (!ibqp)
3243 return -EINVAL;
3244
3245 /* get all our handles */
3246 nesqp = to_nesqp(ibqp);
3247 nesvnic = to_nesvnic(nesqp->ibqp.device);
3248 nesdev = nesvnic->nesdev;
3249 adapter = nesdev->nesadapter;
3250
3251 cm_node = (struct nes_cm_node *)cm_id->provider_data;
3252 nes_debug(NES_DBG_CM, "nes_accept: cm_node= %p nesvnic=%p, netdev=%p,"
3253 "%s\n", cm_node, nesvnic, nesvnic->netdev,
3254 nesvnic->netdev->name);
3255
3256 if (NES_CM_STATE_LISTENER_DESTROYED == cm_node->state) {
3257 if (cm_node->loopbackpartner)
3258 rem_ref_cm_node(cm_node->cm_core, cm_node->loopbackpartner);
3259 rem_ref_cm_node(cm_node->cm_core, cm_node);
3260 return -EINVAL;
3261 }
3262
3263 passive_state = atomic_add_return(1, &cm_node->passive_state);
3264 if (passive_state == NES_SEND_RESET_EVENT) {
3265 rem_ref_cm_node(cm_node->cm_core, cm_node);
3266 return -ECONNRESET;
3267 }
3268 /* associate the node with the QP */
3269 nesqp->cm_node = (void *)cm_node;
3270 cm_node->nesqp = nesqp;
3271
3272
3273 nes_debug(NES_DBG_CM, "QP%u, cm_node=%p, jiffies = %lu listener = %p\n",
3274 nesqp->hwqp.qp_id, cm_node, jiffies, cm_node->listener);
3275 atomic_inc(&cm_accepts);
3276
3277 nes_debug(NES_DBG_CM, "netdev refcnt = %u.\n",
3278 netdev_refcnt_read(nesvnic->netdev));
3279
3280 nesqp->ietf_frame_size = sizeof(struct ietf_mpa_v2);
3281 /* allocate the ietf frame and space for private data */
3282 nesqp->ietf_frame = pci_alloc_consistent(nesdev->pcidev,
3283 nesqp->ietf_frame_size + conn_param->private_data_len,
3284 &nesqp->ietf_frame_pbase);
3285
3286 if (!nesqp->ietf_frame) {
3287 nes_debug(NES_DBG_CM, "Unable to allocate memory for private data\n");
3288 return -ENOMEM;
3289 }
3290 mpa_v2_frame = (struct ietf_mpa_v2 *)nesqp->ietf_frame;
3291
3292 if (cm_node->mpa_frame_rev == IETF_MPA_V1)
3293 mpa_frame_offset = 4;
3294
3295 if (cm_node->mpa_frame_rev == IETF_MPA_V1 ||
3296 cm_node->mpav2_ird_ord == IETF_NO_IRD_ORD) {
3297 record_ird_ord(cm_node, (u16)conn_param->ird, (u16)conn_param->ord);
3298 }
3299
3300 memcpy(mpa_v2_frame->priv_data, conn_param->private_data,
3301 conn_param->private_data_len);
3302
3303 cm_build_mpa_frame(cm_node, start_buff, &buff_len, nesqp->ietf_frame, MPA_KEY_REPLY);
3304 nesqp->private_data_len = conn_param->private_data_len;
3305
3306 /* setup our first outgoing iWarp send WQE (the IETF frame response) */
3307 wqe = &nesqp->hwqp.sq_vbase[0];
3308
3309 if (raddr->sin_addr.s_addr != laddr->sin_addr.s_addr) {
3310 u64temp = (unsigned long)nesqp;
3311 nesibdev = nesvnic->nesibdev;
3312 nespd = nesqp->nespd;
3313 ibphysbuf.addr = nesqp->ietf_frame_pbase + mpa_frame_offset;
3314 ibphysbuf.size = buff_len;
3315 tagged_offset = (u64)(unsigned long)*start_buff;
3316 ibmr = nesibdev->ibdev.reg_phys_mr((struct ib_pd *)nespd,
3317 &ibphysbuf, 1,
3318 IB_ACCESS_LOCAL_WRITE,
3319 &tagged_offset);
3320 if (!ibmr) {
3321 nes_debug(NES_DBG_CM, "Unable to register memory region"
3322 "for lSMM for cm_node = %p \n",
3323 cm_node);
3324 pci_free_consistent(nesdev->pcidev,
3325 nesqp->private_data_len + nesqp->ietf_frame_size,
3326 nesqp->ietf_frame, nesqp->ietf_frame_pbase);
3327 return -ENOMEM;
3328 }
3329
3330 ibmr->pd = &nespd->ibpd;
3331 ibmr->device = nespd->ibpd.device;
3332 nesqp->lsmm_mr = ibmr;
3333
3334 u64temp |= NES_SW_CONTEXT_ALIGN >> 1;
3335 set_wqe_64bit_value(wqe->wqe_words,
3336 NES_IWARP_SQ_WQE_COMP_CTX_LOW_IDX,
3337 u64temp);
3338 wqe->wqe_words[NES_IWARP_SQ_WQE_MISC_IDX] =
3339 cpu_to_le32(NES_IWARP_SQ_WQE_STREAMING |
3340 NES_IWARP_SQ_WQE_WRPDU);
3341 wqe->wqe_words[NES_IWARP_SQ_WQE_TOTAL_PAYLOAD_IDX] =
3342 cpu_to_le32(buff_len);
3343 set_wqe_64bit_value(wqe->wqe_words,
3344 NES_IWARP_SQ_WQE_FRAG0_LOW_IDX,
3345 (u64)(unsigned long)(*start_buff));
3346 wqe->wqe_words[NES_IWARP_SQ_WQE_LENGTH0_IDX] =
3347 cpu_to_le32(buff_len);
3348 wqe->wqe_words[NES_IWARP_SQ_WQE_STAG0_IDX] = ibmr->lkey;
3349 if (nesqp->sq_kmapped) {
3350 nesqp->sq_kmapped = 0;
3351 kunmap(nesqp->page);
3352 }
3353
3354 nesqp->nesqp_context->ird_ord_sizes |=
3355 cpu_to_le32(NES_QPCONTEXT_ORDIRD_LSMM_PRESENT |
3356 NES_QPCONTEXT_ORDIRD_WRPDU);
3357 } else {
3358 nesqp->nesqp_context->ird_ord_sizes |=
3359 cpu_to_le32(NES_QPCONTEXT_ORDIRD_WRPDU);
3360 }
3361 nesqp->skip_lsmm = 1;
3362
3363 /* Cache the cm_id in the qp */
3364 nesqp->cm_id = cm_id;
3365 cm_node->cm_id = cm_id;
3366
3367 /* nesqp->cm_node = (void *)cm_id->provider_data; */
3368 cm_id->provider_data = nesqp;
3369 nesqp->active_conn = 0;
3370
3371 if (cm_node->state == NES_CM_STATE_TSA)
3372 nes_debug(NES_DBG_CM, "Already state = TSA for cm_node=%p\n",
3373 cm_node);
3374
3375 nes_cm_init_tsa_conn(nesqp, cm_node);
3376
3377 nesqp->nesqp_context->tcpPorts[0] =
3378 cpu_to_le16(cm_node->mapped_loc_port);
3379 nesqp->nesqp_context->tcpPorts[1] =
3380 cpu_to_le16(cm_node->mapped_rem_port);
3381
3382 nesqp->nesqp_context->ip0 = cpu_to_le32(cm_node->mapped_rem_addr);
3383
3384 nesqp->nesqp_context->misc2 |= cpu_to_le32(
3385 (u32)PCI_FUNC(nesdev->pcidev->devfn) <<
3386 NES_QPCONTEXT_MISC2_SRC_IP_SHIFT);
3387
3388 nesqp->nesqp_context->arp_index_vlan |=
3389 cpu_to_le32(nes_arp_table(nesdev,
3390 le32_to_cpu(nesqp->nesqp_context->ip0), NULL,
3391 NES_ARP_RESOLVE) << 16);
3392
3393 nesqp->nesqp_context->ts_val_delta = cpu_to_le32(
3394 jiffies - nes_read_indexed(nesdev, NES_IDX_TCP_NOW));
3395
3396 nesqp->nesqp_context->ird_index = cpu_to_le32(nesqp->hwqp.qp_id);
3397
3398 nesqp->nesqp_context->ird_ord_sizes |= cpu_to_le32(
3399 ((u32)1 << NES_QPCONTEXT_ORDIRD_IWARP_MODE_SHIFT));
3400 nesqp->nesqp_context->ird_ord_sizes |=
3401 cpu_to_le32((u32)cm_node->ord_size);
3402
3403 memset(&nes_quad, 0, sizeof(nes_quad));
3404 nes_quad.DstIpAdrIndex =
3405 cpu_to_le32((u32)PCI_FUNC(nesdev->pcidev->devfn) << 24);
3406 nes_quad.SrcIpadr = htonl(cm_node->mapped_rem_addr);
3407 nes_quad.TcpPorts[0] = htons(cm_node->mapped_rem_port);
3408 nes_quad.TcpPorts[1] = htons(cm_node->mapped_loc_port);
3409
3410 /* Produce hash key */
3411 crc_value = get_crc_value(&nes_quad);
3412 nesqp->hte_index = cpu_to_be32(crc_value ^ 0xffffffff);
3413 nes_debug(NES_DBG_CM, "HTE Index = 0x%08X, CRC = 0x%08X\n",
3414 nesqp->hte_index, nesqp->hte_index & adapter->hte_index_mask);
3415
3416 nesqp->hte_index &= adapter->hte_index_mask;
3417 nesqp->nesqp_context->hte_index = cpu_to_le32(nesqp->hte_index);
3418
3419 cm_node->cm_core->api->accelerated(cm_node->cm_core, cm_node);
3420
3421 nes_debug(NES_DBG_CM, "QP%u, Destination IP = 0x%08X:0x%04X, local = "
3422 "0x%08X:0x%04X, rcv_nxt=0x%08X, snd_nxt=0x%08X, mpa + "
3423 "private data length=%u.\n", nesqp->hwqp.qp_id,
3424 ntohl(raddr->sin_addr.s_addr), ntohs(raddr->sin_port),
3425 ntohl(laddr->sin_addr.s_addr), ntohs(laddr->sin_port),
3426 le32_to_cpu(nesqp->nesqp_context->rcv_nxt),
3427 le32_to_cpu(nesqp->nesqp_context->snd_nxt),
3428 buff_len);
3429
3430 /* notify OF layer that accept event was successful */
3431 cm_id->add_ref(cm_id);
3432 nes_add_ref(&nesqp->ibqp);
3433
3434 cm_event.event = IW_CM_EVENT_ESTABLISHED;
3435 cm_event.status = 0;
3436 cm_event.provider_data = (void *)nesqp;
3437 cm_event.local_addr = cm_id->local_addr;
3438 cm_event.remote_addr = cm_id->remote_addr;
3439 cm_event.private_data = NULL;
3440 cm_event.private_data_len = 0;
3441 cm_event.ird = cm_node->ird_size;
3442 cm_event.ord = cm_node->ord_size;
3443
3444 ret = cm_id->event_handler(cm_id, &cm_event);
3445 attr.qp_state = IB_QPS_RTS;
3446 nes_modify_qp(&nesqp->ibqp, &attr, IB_QP_STATE, NULL);
3447 if (cm_node->loopbackpartner) {
3448 cm_node->loopbackpartner->mpa_frame_size =
3449 nesqp->private_data_len;
3450 /* copy entire MPA frame to our cm_node's frame */
3451 memcpy(cm_node->loopbackpartner->mpa_frame_buf,
3452 conn_param->private_data, conn_param->private_data_len);
3453 create_event(cm_node->loopbackpartner, NES_CM_EVENT_CONNECTED);
3454 }
3455 if (ret)
3456 printk(KERN_ERR "%s[%u] OFA CM event_handler returned, "
3457 "ret=%d\n", __func__, __LINE__, ret);
3458
3459 return 0;
3460 }
3461
3462
3463 /**
3464 * nes_reject
3465 */
nes_reject(struct iw_cm_id * cm_id,const void * pdata,u8 pdata_len)3466 int nes_reject(struct iw_cm_id *cm_id, const void *pdata, u8 pdata_len)
3467 {
3468 struct nes_cm_node *cm_node;
3469 struct nes_cm_node *loopback;
3470 struct nes_cm_core *cm_core;
3471 u8 *start_buff;
3472
3473 atomic_inc(&cm_rejects);
3474 cm_node = (struct nes_cm_node *)cm_id->provider_data;
3475 loopback = cm_node->loopbackpartner;
3476 cm_core = cm_node->cm_core;
3477 cm_node->cm_id = cm_id;
3478
3479 if (pdata_len + sizeof(struct ietf_mpa_v2) > MAX_CM_BUFFER)
3480 return -EINVAL;
3481
3482 if (loopback) {
3483 memcpy(&loopback->mpa_frame.priv_data, pdata, pdata_len);
3484 loopback->mpa_frame.priv_data_len = pdata_len;
3485 loopback->mpa_frame_size = pdata_len;
3486 } else {
3487 start_buff = &cm_node->mpa_frame_buf[0] + sizeof(struct ietf_mpa_v2);
3488 cm_node->mpa_frame_size = pdata_len;
3489 memcpy(start_buff, pdata, pdata_len);
3490 }
3491 return cm_core->api->reject(cm_core, cm_node);
3492 }
3493
3494
3495 /**
3496 * nes_connect
3497 * setup and launch cm connect node
3498 */
nes_connect(struct iw_cm_id * cm_id,struct iw_cm_conn_param * conn_param)3499 int nes_connect(struct iw_cm_id *cm_id, struct iw_cm_conn_param *conn_param)
3500 {
3501 struct ib_qp *ibqp;
3502 struct nes_qp *nesqp;
3503 struct nes_vnic *nesvnic;
3504 struct nes_device *nesdev;
3505 struct nes_cm_node *cm_node;
3506 struct nes_cm_info cm_info;
3507 int apbvt_set = 0;
3508 struct sockaddr_in *laddr = (struct sockaddr_in *)&cm_id->local_addr;
3509 struct sockaddr_in *raddr = (struct sockaddr_in *)&cm_id->remote_addr;
3510 struct iwpm_dev_data pm_reg_msg;
3511 struct iwpm_sa_data pm_msg;
3512 int iwpm_err = 0;
3513
3514 if (cm_id->remote_addr.ss_family != AF_INET)
3515 return -ENOSYS;
3516 ibqp = nes_get_qp(cm_id->device, conn_param->qpn);
3517 if (!ibqp)
3518 return -EINVAL;
3519 nesqp = to_nesqp(ibqp);
3520 if (!nesqp)
3521 return -EINVAL;
3522 nesvnic = to_nesvnic(nesqp->ibqp.device);
3523 if (!nesvnic)
3524 return -EINVAL;
3525 nesdev = nesvnic->nesdev;
3526 if (!nesdev)
3527 return -EINVAL;
3528
3529 if (!laddr->sin_port || !raddr->sin_port)
3530 return -EINVAL;
3531
3532 nes_debug(NES_DBG_CM, "QP%u, current IP = 0x%08X, Destination IP = "
3533 "0x%08X:0x%04X, local = 0x%08X:0x%04X.\n", nesqp->hwqp.qp_id,
3534 ntohl(nesvnic->local_ipaddr), ntohl(raddr->sin_addr.s_addr),
3535 ntohs(raddr->sin_port), ntohl(laddr->sin_addr.s_addr),
3536 ntohs(laddr->sin_port));
3537
3538 atomic_inc(&cm_connects);
3539 nesqp->active_conn = 1;
3540
3541 /* cache the cm_id in the qp */
3542 nesqp->cm_id = cm_id;
3543 cm_id->provider_data = nesqp;
3544 nesqp->private_data_len = conn_param->private_data_len;
3545
3546 nes_debug(NES_DBG_CM, "requested ord = 0x%08X.\n", (u32)conn_param->ord);
3547 nes_debug(NES_DBG_CM, "mpa private data len =%u\n",
3548 conn_param->private_data_len);
3549
3550 /* set up the connection params for the node */
3551 cm_info.loc_addr = ntohl(laddr->sin_addr.s_addr);
3552 cm_info.loc_port = ntohs(laddr->sin_port);
3553 cm_info.rem_addr = ntohl(raddr->sin_addr.s_addr);
3554 cm_info.rem_port = ntohs(raddr->sin_port);
3555 cm_info.cm_id = cm_id;
3556 cm_info.conn_type = NES_CM_IWARP_CONN_TYPE;
3557
3558 /* No port mapper available, go with the specified peer information */
3559 cm_info.mapped_loc_addr = cm_info.loc_addr;
3560 cm_info.mapped_loc_port = cm_info.loc_port;
3561 cm_info.mapped_rem_addr = cm_info.rem_addr;
3562 cm_info.mapped_rem_port = cm_info.rem_port;
3563
3564 nes_form_reg_msg(nesvnic, &pm_reg_msg);
3565 iwpm_err = iwpm_register_pid(&pm_reg_msg, RDMA_NL_NES);
3566 if (iwpm_err) {
3567 nes_debug(NES_DBG_NLMSG,
3568 "Port Mapper reg pid fail (err = %d).\n", iwpm_err);
3569 }
3570 if (iwpm_valid_pid() && !iwpm_err) {
3571 nes_form_pm_msg(&cm_info, &pm_msg);
3572 iwpm_err = iwpm_add_and_query_mapping(&pm_msg, RDMA_NL_NES);
3573 if (iwpm_err)
3574 nes_debug(NES_DBG_NLMSG,
3575 "Port Mapper query fail (err = %d).\n", iwpm_err);
3576 else
3577 nes_record_pm_msg(&cm_info, &pm_msg);
3578 }
3579
3580 if (laddr->sin_addr.s_addr != raddr->sin_addr.s_addr) {
3581 nes_manage_apbvt(nesvnic, cm_info.mapped_loc_port,
3582 PCI_FUNC(nesdev->pcidev->devfn), NES_MANAGE_APBVT_ADD);
3583 apbvt_set = 1;
3584 }
3585
3586 if (nes_create_mapinfo(&cm_info))
3587 return -ENOMEM;
3588
3589 cm_id->add_ref(cm_id);
3590
3591 /* create a connect CM node connection */
3592 cm_node = g_cm_core->api->connect(g_cm_core, nesvnic,
3593 conn_param->private_data_len, (void *)conn_param->private_data,
3594 &cm_info);
3595 if (!cm_node) {
3596 if (apbvt_set)
3597 nes_manage_apbvt(nesvnic, cm_info.mapped_loc_port,
3598 PCI_FUNC(nesdev->pcidev->devfn),
3599 NES_MANAGE_APBVT_DEL);
3600
3601 nes_debug(NES_DBG_NLMSG, "Delete mapped_loc_port = %04X\n",
3602 cm_info.mapped_loc_port);
3603 nes_remove_mapinfo(cm_info.loc_addr, cm_info.loc_port,
3604 cm_info.mapped_loc_addr, cm_info.mapped_loc_port);
3605 cm_id->rem_ref(cm_id);
3606 return -ENOMEM;
3607 }
3608
3609 record_ird_ord(cm_node, (u16)conn_param->ird, (u16)conn_param->ord);
3610 if (cm_node->send_rdma0_op == SEND_RDMA_READ_ZERO &&
3611 cm_node->ord_size == 0)
3612 cm_node->ord_size = 1;
3613
3614 cm_node->apbvt_set = apbvt_set;
3615 nesqp->cm_node = cm_node;
3616 cm_node->nesqp = nesqp;
3617 nes_add_ref(&nesqp->ibqp);
3618
3619 return 0;
3620 }
3621
3622
3623 /**
3624 * nes_create_listen
3625 */
nes_create_listen(struct iw_cm_id * cm_id,int backlog)3626 int nes_create_listen(struct iw_cm_id *cm_id, int backlog)
3627 {
3628 struct nes_vnic *nesvnic;
3629 struct nes_cm_listener *cm_node;
3630 struct nes_cm_info cm_info;
3631 int err;
3632 struct sockaddr_in *laddr = (struct sockaddr_in *)&cm_id->local_addr;
3633
3634 nes_debug(NES_DBG_CM, "cm_id = %p, local port = 0x%04X.\n",
3635 cm_id, ntohs(laddr->sin_port));
3636
3637 if (cm_id->local_addr.ss_family != AF_INET)
3638 return -ENOSYS;
3639 nesvnic = to_nesvnic(cm_id->device);
3640 if (!nesvnic)
3641 return -EINVAL;
3642
3643 nes_debug(NES_DBG_CM, "nesvnic=%p, netdev=%p, %s\n",
3644 nesvnic, nesvnic->netdev, nesvnic->netdev->name);
3645
3646 nes_debug(NES_DBG_CM, "nesvnic->local_ipaddr=0x%08x, sin_addr.s_addr=0x%08x\n",
3647 nesvnic->local_ipaddr, laddr->sin_addr.s_addr);
3648
3649 /* setup listen params in our api call struct */
3650 cm_info.loc_addr = ntohl(nesvnic->local_ipaddr);
3651 cm_info.loc_port = ntohs(laddr->sin_port);
3652 cm_info.backlog = backlog;
3653 cm_info.cm_id = cm_id;
3654
3655 cm_info.conn_type = NES_CM_IWARP_CONN_TYPE;
3656
3657 /* No port mapper available, go with the specified info */
3658 cm_info.mapped_loc_addr = cm_info.loc_addr;
3659 cm_info.mapped_loc_port = cm_info.loc_port;
3660
3661 cm_node = g_cm_core->api->listen(g_cm_core, nesvnic, &cm_info);
3662 if (!cm_node) {
3663 printk(KERN_ERR "%s[%u] Error returned from listen API call\n",
3664 __func__, __LINE__);
3665 return -ENOMEM;
3666 }
3667
3668 cm_id->provider_data = cm_node;
3669
3670 if (!cm_node->reused_node) {
3671 if (nes_create_mapinfo(&cm_info))
3672 return -ENOMEM;
3673
3674 err = nes_manage_apbvt(nesvnic, cm_node->mapped_loc_port,
3675 PCI_FUNC(nesvnic->nesdev->pcidev->devfn),
3676 NES_MANAGE_APBVT_ADD);
3677 if (err) {
3678 printk(KERN_ERR "nes_manage_apbvt call returned %d.\n",
3679 err);
3680 g_cm_core->api->stop_listener(g_cm_core, (void *)cm_node);
3681 return err;
3682 }
3683 atomic_inc(&cm_listens_created);
3684 }
3685
3686 cm_id->add_ref(cm_id);
3687 cm_id->provider_data = (void *)cm_node;
3688
3689
3690 return 0;
3691 }
3692
3693
3694 /**
3695 * nes_destroy_listen
3696 */
nes_destroy_listen(struct iw_cm_id * cm_id)3697 int nes_destroy_listen(struct iw_cm_id *cm_id)
3698 {
3699 if (cm_id->provider_data)
3700 g_cm_core->api->stop_listener(g_cm_core, cm_id->provider_data);
3701 else
3702 nes_debug(NES_DBG_CM, "cm_id->provider_data was NULL\n");
3703
3704 cm_id->rem_ref(cm_id);
3705
3706 return 0;
3707 }
3708
3709
3710 /**
3711 * nes_cm_recv
3712 */
nes_cm_recv(struct sk_buff * skb,struct net_device * netdevice)3713 int nes_cm_recv(struct sk_buff *skb, struct net_device *netdevice)
3714 {
3715 int rc = 0;
3716
3717 cm_packets_received++;
3718 if ((g_cm_core) && (g_cm_core->api))
3719 rc = g_cm_core->api->recv_pkt(g_cm_core, netdev_priv(netdevice), skb);
3720 else
3721 nes_debug(NES_DBG_CM, "Unable to process packet for CM,"
3722 " cm is not setup properly.\n");
3723
3724 return rc;
3725 }
3726
3727
3728 /**
3729 * nes_cm_start
3730 * Start and init a cm core module
3731 */
nes_cm_start(void)3732 int nes_cm_start(void)
3733 {
3734 nes_debug(NES_DBG_CM, "\n");
3735 /* create the primary CM core, pass this handle to subsequent core inits */
3736 g_cm_core = nes_cm_alloc_core();
3737 if (g_cm_core)
3738 return 0;
3739 else
3740 return -ENOMEM;
3741 }
3742
3743
3744 /**
3745 * nes_cm_stop
3746 * stop and dealloc all cm core instances
3747 */
nes_cm_stop(void)3748 int nes_cm_stop(void)
3749 {
3750 g_cm_core->api->destroy_cm_core(g_cm_core);
3751 return 0;
3752 }
3753
3754
3755 /**
3756 * cm_event_connected
3757 * handle a connected event, setup QPs and HW
3758 */
cm_event_connected(struct nes_cm_event * event)3759 static void cm_event_connected(struct nes_cm_event *event)
3760 {
3761 struct nes_qp *nesqp;
3762 struct nes_vnic *nesvnic;
3763 struct nes_device *nesdev;
3764 struct nes_cm_node *cm_node;
3765 struct nes_adapter *nesadapter;
3766 struct ib_qp_attr attr;
3767 struct iw_cm_id *cm_id;
3768 struct iw_cm_event cm_event;
3769 struct nes_v4_quad nes_quad;
3770 u32 crc_value;
3771 int ret;
3772 struct sockaddr_in *laddr;
3773 struct sockaddr_in *raddr;
3774 struct sockaddr_in *cm_event_laddr;
3775
3776 /* get all our handles */
3777 cm_node = event->cm_node;
3778 cm_id = cm_node->cm_id;
3779 nes_debug(NES_DBG_CM, "cm_event_connected - %p - cm_id = %p\n", cm_node, cm_id);
3780 nesqp = (struct nes_qp *)cm_id->provider_data;
3781 nesvnic = to_nesvnic(nesqp->ibqp.device);
3782 nesdev = nesvnic->nesdev;
3783 nesadapter = nesdev->nesadapter;
3784 laddr = (struct sockaddr_in *)&cm_id->local_addr;
3785 raddr = (struct sockaddr_in *)&cm_id->remote_addr;
3786 cm_event_laddr = (struct sockaddr_in *)&cm_event.local_addr;
3787
3788 if (nesqp->destroyed)
3789 return;
3790 atomic_inc(&cm_connecteds);
3791 nes_debug(NES_DBG_CM, "QP%u attempting to connect to 0x%08X:0x%04X on"
3792 " local port 0x%04X. jiffies = %lu.\n",
3793 nesqp->hwqp.qp_id, ntohl(raddr->sin_addr.s_addr),
3794 ntohs(raddr->sin_port), ntohs(laddr->sin_port), jiffies);
3795
3796 nes_cm_init_tsa_conn(nesqp, cm_node);
3797
3798 /* set the QP tsa context */
3799 nesqp->nesqp_context->tcpPorts[0] =
3800 cpu_to_le16(cm_node->mapped_loc_port);
3801 nesqp->nesqp_context->tcpPorts[1] =
3802 cpu_to_le16(cm_node->mapped_rem_port);
3803 nesqp->nesqp_context->ip0 = cpu_to_le32(cm_node->mapped_rem_addr);
3804
3805 nesqp->nesqp_context->misc2 |= cpu_to_le32(
3806 (u32)PCI_FUNC(nesdev->pcidev->devfn) <<
3807 NES_QPCONTEXT_MISC2_SRC_IP_SHIFT);
3808 nesqp->nesqp_context->arp_index_vlan |= cpu_to_le32(
3809 nes_arp_table(nesdev,
3810 le32_to_cpu(nesqp->nesqp_context->ip0),
3811 NULL, NES_ARP_RESOLVE) << 16);
3812 nesqp->nesqp_context->ts_val_delta = cpu_to_le32(
3813 jiffies - nes_read_indexed(nesdev, NES_IDX_TCP_NOW));
3814 nesqp->nesqp_context->ird_index = cpu_to_le32(nesqp->hwqp.qp_id);
3815 nesqp->nesqp_context->ird_ord_sizes |=
3816 cpu_to_le32((u32)1 <<
3817 NES_QPCONTEXT_ORDIRD_IWARP_MODE_SHIFT);
3818 nesqp->nesqp_context->ird_ord_sizes |=
3819 cpu_to_le32((u32)cm_node->ord_size);
3820
3821 /* Adjust tail for not having a LSMM */
3822 /*nesqp->hwqp.sq_tail = 1;*/
3823
3824 build_rdma0_msg(cm_node, &nesqp);
3825
3826 nes_write32(nesdev->regs + NES_WQE_ALLOC,
3827 (1 << 24) | 0x00800000 | nesqp->hwqp.qp_id);
3828
3829 memset(&nes_quad, 0, sizeof(nes_quad));
3830
3831 nes_quad.DstIpAdrIndex =
3832 cpu_to_le32((u32)PCI_FUNC(nesdev->pcidev->devfn) << 24);
3833 nes_quad.SrcIpadr = htonl(cm_node->mapped_rem_addr);
3834 nes_quad.TcpPorts[0] = htons(cm_node->mapped_rem_port);
3835 nes_quad.TcpPorts[1] = htons(cm_node->mapped_loc_port);
3836
3837 /* Produce hash key */
3838 crc_value = get_crc_value(&nes_quad);
3839 nesqp->hte_index = cpu_to_be32(crc_value ^ 0xffffffff);
3840 nes_debug(NES_DBG_CM, "HTE Index = 0x%08X, After CRC = 0x%08X\n",
3841 nesqp->hte_index, nesqp->hte_index & nesadapter->hte_index_mask);
3842
3843 nesqp->hte_index &= nesadapter->hte_index_mask;
3844 nesqp->nesqp_context->hte_index = cpu_to_le32(nesqp->hte_index);
3845
3846 nesqp->ietf_frame = &cm_node->mpa_frame;
3847 nesqp->private_data_len = (u8)cm_node->mpa_frame_size;
3848 cm_node->cm_core->api->accelerated(cm_node->cm_core, cm_node);
3849
3850 /* notify OF layer we successfully created the requested connection */
3851 cm_event.event = IW_CM_EVENT_CONNECT_REPLY;
3852 cm_event.status = 0;
3853 cm_event.provider_data = cm_id->provider_data;
3854 cm_event_laddr->sin_family = AF_INET;
3855 cm_event_laddr->sin_port = laddr->sin_port;
3856 cm_event.remote_addr = cm_id->remote_addr;
3857
3858 cm_event.private_data = (void *)event->cm_node->mpa_frame_buf;
3859 cm_event.private_data_len = (u8)event->cm_node->mpa_frame_size;
3860 cm_event.ird = cm_node->ird_size;
3861 cm_event.ord = cm_node->ord_size;
3862
3863 cm_event_laddr->sin_addr.s_addr = htonl(event->cm_info.rem_addr);
3864 ret = cm_id->event_handler(cm_id, &cm_event);
3865 nes_debug(NES_DBG_CM, "OFA CM event_handler returned, ret=%d\n", ret);
3866
3867 if (ret)
3868 printk(KERN_ERR "%s[%u] OFA CM event_handler returned, "
3869 "ret=%d\n", __func__, __LINE__, ret);
3870 attr.qp_state = IB_QPS_RTS;
3871 nes_modify_qp(&nesqp->ibqp, &attr, IB_QP_STATE, NULL);
3872
3873 nes_debug(NES_DBG_CM, "Exiting connect thread for QP%u. jiffies = "
3874 "%lu\n", nesqp->hwqp.qp_id, jiffies);
3875
3876 return;
3877 }
3878
3879
3880 /**
3881 * cm_event_connect_error
3882 */
cm_event_connect_error(struct nes_cm_event * event)3883 static void cm_event_connect_error(struct nes_cm_event *event)
3884 {
3885 struct nes_qp *nesqp;
3886 struct iw_cm_id *cm_id;
3887 struct iw_cm_event cm_event;
3888 /* struct nes_cm_info cm_info; */
3889 int ret;
3890
3891 if (!event->cm_node)
3892 return;
3893
3894 cm_id = event->cm_node->cm_id;
3895 if (!cm_id)
3896 return;
3897
3898 nes_debug(NES_DBG_CM, "cm_node=%p, cm_id=%p\n", event->cm_node, cm_id);
3899 nesqp = cm_id->provider_data;
3900
3901 if (!nesqp)
3902 return;
3903
3904 /* notify OF layer about this connection error event */
3905 /* cm_id->rem_ref(cm_id); */
3906 nesqp->cm_id = NULL;
3907 cm_id->provider_data = NULL;
3908 cm_event.event = IW_CM_EVENT_CONNECT_REPLY;
3909 cm_event.status = -ECONNRESET;
3910 cm_event.provider_data = cm_id->provider_data;
3911 cm_event.local_addr = cm_id->local_addr;
3912 cm_event.remote_addr = cm_id->remote_addr;
3913 cm_event.private_data = NULL;
3914 cm_event.private_data_len = 0;
3915
3916 #ifdef CONFIG_INFINIBAND_NES_DEBUG
3917 {
3918 struct sockaddr_in *cm_event_laddr = (struct sockaddr_in *)
3919 &cm_event.local_addr;
3920 struct sockaddr_in *cm_event_raddr = (struct sockaddr_in *)
3921 &cm_event.remote_addr;
3922 nes_debug(NES_DBG_CM, "call CM_EVENT REJECTED, local_addr=%08x, remote_addr=%08x\n",
3923 cm_event_laddr->sin_addr.s_addr, cm_event_raddr->sin_addr.s_addr);
3924 }
3925 #endif
3926
3927 ret = cm_id->event_handler(cm_id, &cm_event);
3928 nes_debug(NES_DBG_CM, "OFA CM event_handler returned, ret=%d\n", ret);
3929 if (ret)
3930 printk(KERN_ERR "%s[%u] OFA CM event_handler returned, "
3931 "ret=%d\n", __func__, __LINE__, ret);
3932 cm_id->rem_ref(cm_id);
3933
3934 rem_ref_cm_node(event->cm_node->cm_core, event->cm_node);
3935 return;
3936 }
3937
3938
3939 /**
3940 * cm_event_reset
3941 */
cm_event_reset(struct nes_cm_event * event)3942 static void cm_event_reset(struct nes_cm_event *event)
3943 {
3944 struct nes_qp *nesqp;
3945 struct iw_cm_id *cm_id;
3946 struct iw_cm_event cm_event;
3947 /* struct nes_cm_info cm_info; */
3948 int ret;
3949
3950 if (!event->cm_node)
3951 return;
3952
3953 if (!event->cm_node->cm_id)
3954 return;
3955
3956 cm_id = event->cm_node->cm_id;
3957
3958 nes_debug(NES_DBG_CM, "%p - cm_id = %p\n", event->cm_node, cm_id);
3959 nesqp = cm_id->provider_data;
3960 if (!nesqp)
3961 return;
3962
3963 nesqp->cm_id = NULL;
3964 /* cm_id->provider_data = NULL; */
3965 cm_event.event = IW_CM_EVENT_DISCONNECT;
3966 cm_event.status = -ECONNRESET;
3967 cm_event.provider_data = cm_id->provider_data;
3968 cm_event.local_addr = cm_id->local_addr;
3969 cm_event.remote_addr = cm_id->remote_addr;
3970 cm_event.private_data = NULL;
3971 cm_event.private_data_len = 0;
3972
3973 cm_id->add_ref(cm_id);
3974 ret = cm_id->event_handler(cm_id, &cm_event);
3975 atomic_inc(&cm_closes);
3976 cm_event.event = IW_CM_EVENT_CLOSE;
3977 cm_event.status = 0;
3978 cm_event.provider_data = cm_id->provider_data;
3979 cm_event.local_addr = cm_id->local_addr;
3980 cm_event.remote_addr = cm_id->remote_addr;
3981 cm_event.private_data = NULL;
3982 cm_event.private_data_len = 0;
3983 nes_debug(NES_DBG_CM, "NODE %p Generating CLOSE\n", event->cm_node);
3984 ret = cm_id->event_handler(cm_id, &cm_event);
3985
3986 nes_debug(NES_DBG_CM, "OFA CM event_handler returned, ret=%d\n", ret);
3987
3988
3989 /* notify OF layer about this connection error event */
3990 cm_id->rem_ref(cm_id);
3991
3992 return;
3993 }
3994
3995
3996 /**
3997 * cm_event_mpa_req
3998 */
cm_event_mpa_req(struct nes_cm_event * event)3999 static void cm_event_mpa_req(struct nes_cm_event *event)
4000 {
4001 struct iw_cm_id *cm_id;
4002 struct iw_cm_event cm_event;
4003 int ret;
4004 struct nes_cm_node *cm_node;
4005 struct sockaddr_in *cm_event_laddr = (struct sockaddr_in *)
4006 &cm_event.local_addr;
4007 struct sockaddr_in *cm_event_raddr = (struct sockaddr_in *)
4008 &cm_event.remote_addr;
4009
4010 cm_node = event->cm_node;
4011 if (!cm_node)
4012 return;
4013 cm_id = cm_node->cm_id;
4014
4015 atomic_inc(&cm_connect_reqs);
4016 nes_debug(NES_DBG_CM, "cm_node = %p - cm_id = %p, jiffies = %lu\n",
4017 cm_node, cm_id, jiffies);
4018
4019 cm_event.event = IW_CM_EVENT_CONNECT_REQUEST;
4020 cm_event.status = 0;
4021 cm_event.provider_data = (void *)cm_node;
4022
4023 cm_event_laddr->sin_family = AF_INET;
4024 cm_event_laddr->sin_port = htons(event->cm_info.loc_port);
4025 cm_event_laddr->sin_addr.s_addr = htonl(event->cm_info.loc_addr);
4026
4027 cm_event_raddr->sin_family = AF_INET;
4028 cm_event_raddr->sin_port = htons(event->cm_info.rem_port);
4029 cm_event_raddr->sin_addr.s_addr = htonl(event->cm_info.rem_addr);
4030 cm_event.private_data = cm_node->mpa_frame_buf;
4031 cm_event.private_data_len = (u8)cm_node->mpa_frame_size;
4032 if (cm_node->mpa_frame_rev == IETF_MPA_V1) {
4033 cm_event.ird = NES_MAX_IRD;
4034 cm_event.ord = NES_MAX_ORD;
4035 } else {
4036 cm_event.ird = cm_node->ird_size;
4037 cm_event.ord = cm_node->ord_size;
4038 }
4039
4040 ret = cm_id->event_handler(cm_id, &cm_event);
4041 if (ret)
4042 printk(KERN_ERR "%s[%u] OFA CM event_handler returned, ret=%d\n",
4043 __func__, __LINE__, ret);
4044 return;
4045 }
4046
4047
cm_event_mpa_reject(struct nes_cm_event * event)4048 static void cm_event_mpa_reject(struct nes_cm_event *event)
4049 {
4050 struct iw_cm_id *cm_id;
4051 struct iw_cm_event cm_event;
4052 struct nes_cm_node *cm_node;
4053 int ret;
4054 struct sockaddr_in *cm_event_laddr = (struct sockaddr_in *)
4055 &cm_event.local_addr;
4056 struct sockaddr_in *cm_event_raddr = (struct sockaddr_in *)
4057 &cm_event.remote_addr;
4058
4059 cm_node = event->cm_node;
4060 if (!cm_node)
4061 return;
4062 cm_id = cm_node->cm_id;
4063
4064 atomic_inc(&cm_connect_reqs);
4065 nes_debug(NES_DBG_CM, "cm_node = %p - cm_id = %p, jiffies = %lu\n",
4066 cm_node, cm_id, jiffies);
4067
4068 cm_event.event = IW_CM_EVENT_CONNECT_REPLY;
4069 cm_event.status = -ECONNREFUSED;
4070 cm_event.provider_data = cm_id->provider_data;
4071
4072 cm_event_laddr->sin_family = AF_INET;
4073 cm_event_laddr->sin_port = htons(event->cm_info.loc_port);
4074 cm_event_laddr->sin_addr.s_addr = htonl(event->cm_info.loc_addr);
4075
4076 cm_event_raddr->sin_family = AF_INET;
4077 cm_event_raddr->sin_port = htons(event->cm_info.rem_port);
4078 cm_event_raddr->sin_addr.s_addr = htonl(event->cm_info.rem_addr);
4079
4080 cm_event.private_data = cm_node->mpa_frame_buf;
4081 cm_event.private_data_len = (u8)cm_node->mpa_frame_size;
4082
4083 nes_debug(NES_DBG_CM, "call CM_EVENT_MPA_REJECTED, local_addr=%08x, "
4084 "remove_addr=%08x\n",
4085 cm_event_laddr->sin_addr.s_addr,
4086 cm_event_raddr->sin_addr.s_addr);
4087
4088 ret = cm_id->event_handler(cm_id, &cm_event);
4089 if (ret)
4090 printk(KERN_ERR "%s[%u] OFA CM event_handler returned, ret=%d\n",
4091 __func__, __LINE__, ret);
4092
4093 return;
4094 }
4095
4096
4097 static void nes_cm_event_handler(struct work_struct *);
4098
4099 /**
4100 * nes_cm_post_event
4101 * post an event to the cm event handler
4102 */
nes_cm_post_event(struct nes_cm_event * event)4103 static int nes_cm_post_event(struct nes_cm_event *event)
4104 {
4105 atomic_inc(&event->cm_node->cm_core->events_posted);
4106 add_ref_cm_node(event->cm_node);
4107 event->cm_info.cm_id->add_ref(event->cm_info.cm_id);
4108 INIT_WORK(&event->event_work, nes_cm_event_handler);
4109 nes_debug(NES_DBG_CM, "cm_node=%p queue_work, event=%p\n",
4110 event->cm_node, event);
4111
4112 queue_work(event->cm_node->cm_core->event_wq, &event->event_work);
4113
4114 nes_debug(NES_DBG_CM, "Exit\n");
4115 return 0;
4116 }
4117
4118
4119 /**
4120 * nes_cm_event_handler
4121 * worker function to handle cm events
4122 * will free instance of nes_cm_event
4123 */
nes_cm_event_handler(struct work_struct * work)4124 static void nes_cm_event_handler(struct work_struct *work)
4125 {
4126 struct nes_cm_event *event = container_of(work, struct nes_cm_event,
4127 event_work);
4128 struct nes_cm_core *cm_core;
4129
4130 if ((!event) || (!event->cm_node) || (!event->cm_node->cm_core))
4131 return;
4132
4133 cm_core = event->cm_node->cm_core;
4134 nes_debug(NES_DBG_CM, "event=%p, event->type=%u, events posted=%u\n",
4135 event, event->type, atomic_read(&cm_core->events_posted));
4136
4137 switch (event->type) {
4138 case NES_CM_EVENT_MPA_REQ:
4139 cm_event_mpa_req(event);
4140 nes_debug(NES_DBG_CM, "cm_node=%p CM Event: MPA REQUEST\n",
4141 event->cm_node);
4142 break;
4143 case NES_CM_EVENT_RESET:
4144 nes_debug(NES_DBG_CM, "cm_node = %p CM Event: RESET\n",
4145 event->cm_node);
4146 cm_event_reset(event);
4147 break;
4148 case NES_CM_EVENT_CONNECTED:
4149 if ((!event->cm_node->cm_id) ||
4150 (event->cm_node->state != NES_CM_STATE_TSA))
4151 break;
4152 cm_event_connected(event);
4153 nes_debug(NES_DBG_CM, "CM Event: CONNECTED\n");
4154 break;
4155 case NES_CM_EVENT_MPA_REJECT:
4156 if ((!event->cm_node->cm_id) ||
4157 (event->cm_node->state == NES_CM_STATE_TSA))
4158 break;
4159 cm_event_mpa_reject(event);
4160 nes_debug(NES_DBG_CM, "CM Event: REJECT\n");
4161 break;
4162
4163 case NES_CM_EVENT_ABORTED:
4164 if ((!event->cm_node->cm_id) ||
4165 (event->cm_node->state == NES_CM_STATE_TSA))
4166 break;
4167 cm_event_connect_error(event);
4168 nes_debug(NES_DBG_CM, "CM Event: ABORTED\n");
4169 break;
4170 case NES_CM_EVENT_DROPPED_PKT:
4171 nes_debug(NES_DBG_CM, "CM Event: DROPPED PKT\n");
4172 break;
4173 default:
4174 nes_debug(NES_DBG_CM, "CM Event: UNKNOWN EVENT TYPE\n");
4175 break;
4176 }
4177
4178 atomic_dec(&cm_core->events_posted);
4179 event->cm_info.cm_id->rem_ref(event->cm_info.cm_id);
4180 rem_ref_cm_node(cm_core, event->cm_node);
4181 kfree(event);
4182
4183 return;
4184 }
4185