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Merge tag 'driver-core-4.6-rc4' of git://git.kernel.org/pub/scm/linux/kernel/git...
[deliverable/linux.git] / drivers / infiniband / hw / i40iw / i40iw_cm.c
1 /*******************************************************************************
2 *
3 * Copyright (c) 2015-2016 Intel Corporation. All rights reserved.
4 *
5 * This software is available to you under a choice of one of two
6 * licenses. You may choose to be licensed under the terms of the GNU
7 * General Public License (GPL) Version 2, available from the file
8 * COPYING in the main directory of this source tree, or the
9 * OpenFabrics.org BSD license below:
10 *
11 * Redistribution and use in source and binary forms, with or
12 * without modification, are permitted provided that the following
13 * conditions are met:
14 *
15 * - Redistributions of source code must retain the above
16 * copyright notice, this list of conditions and the following
17 * disclaimer.
18 *
19 * - Redistributions in binary form must reproduce the above
20 * copyright notice, this list of conditions and the following
21 * disclaimer in the documentation and/or other materials
22 * provided with the distribution.
23 *
24 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
25 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
26 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
27 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
28 * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
29 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
30 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
31 * SOFTWARE.
32 *
33 *******************************************************************************/
34
35 #include <linux/atomic.h>
36 #include <linux/ip.h>
37 #include <linux/tcp.h>
38 #include <linux/init.h>
39 #include <linux/if_arp.h>
40 #include <linux/if_vlan.h>
41 #include <linux/notifier.h>
42 #include <linux/net.h>
43 #include <linux/types.h>
44 #include <linux/timer.h>
45 #include <linux/time.h>
46 #include <linux/delay.h>
47 #include <linux/etherdevice.h>
48 #include <linux/netdevice.h>
49 #include <linux/random.h>
50 #include <linux/list.h>
51 #include <linux/threads.h>
52 #include <linux/highmem.h>
53 #include <net/arp.h>
54 #include <net/ndisc.h>
55 #include <net/neighbour.h>
56 #include <net/route.h>
57 #include <net/addrconf.h>
58 #include <net/ip6_route.h>
59 #include <net/ip_fib.h>
60 #include <net/tcp.h>
61 #include <asm/checksum.h>
62
63 #include "i40iw.h"
64
65 static void i40iw_rem_ref_cm_node(struct i40iw_cm_node *);
66 static void i40iw_cm_post_event(struct i40iw_cm_event *event);
67 static void i40iw_disconnect_worker(struct work_struct *work);
68
69 /**
70 * i40iw_free_sqbuf - put back puda buffer if refcount = 0
71 * @dev: FPK device
72 * @buf: puda buffer to free
73 */
74 void i40iw_free_sqbuf(struct i40iw_sc_dev *dev, void *bufp)
75 {
76 struct i40iw_puda_buf *buf = (struct i40iw_puda_buf *)bufp;
77 struct i40iw_puda_rsrc *ilq = dev->ilq;
78
79 if (!atomic_dec_return(&buf->refcount))
80 i40iw_puda_ret_bufpool(ilq, buf);
81 }
82
83 /**
84 * i40iw_derive_hw_ird_setting - Calculate IRD
85 *
86 * @cm_ird: IRD of connection's node
87 *
88 * The ird from the connection is rounded to a supported HW
89 * setting (2,8,32,64) and then encoded for ird_size field of
90 * qp_ctx
91 */
92 static u8 i40iw_derive_hw_ird_setting(u16 cm_ird)
93 {
94 u8 encoded_ird_size;
95 u8 pof2_cm_ird = 1;
96
97 /* round-off to next powerof2 */
98 while (pof2_cm_ird < cm_ird)
99 pof2_cm_ird *= 2;
100
101 /* ird_size field is encoded in qp_ctx */
102 switch (pof2_cm_ird) {
103 case I40IW_HW_IRD_SETTING_64:
104 encoded_ird_size = 3;
105 break;
106 case I40IW_HW_IRD_SETTING_32:
107 case I40IW_HW_IRD_SETTING_16:
108 encoded_ird_size = 2;
109 break;
110 case I40IW_HW_IRD_SETTING_8:
111 case I40IW_HW_IRD_SETTING_4:
112 encoded_ird_size = 1;
113 break;
114 case I40IW_HW_IRD_SETTING_2:
115 default:
116 encoded_ird_size = 0;
117 break;
118 }
119 return encoded_ird_size;
120 }
121
122 /**
123 * i40iw_record_ird_ord - Record IRD/ORD passed in
124 * @cm_node: connection's node
125 * @conn_ird: connection IRD
126 * @conn_ord: connection ORD
127 */
128 static void i40iw_record_ird_ord(struct i40iw_cm_node *cm_node, u16 conn_ird, u16 conn_ord)
129 {
130 if (conn_ird > I40IW_MAX_IRD_SIZE)
131 conn_ird = I40IW_MAX_IRD_SIZE;
132
133 if (conn_ord > I40IW_MAX_ORD_SIZE)
134 conn_ord = I40IW_MAX_ORD_SIZE;
135
136 cm_node->ird_size = conn_ird;
137 cm_node->ord_size = conn_ord;
138 }
139
140 /**
141 * i40iw_copy_ip_ntohl - change network to host ip
142 * @dst: host ip
143 * @src: big endian
144 */
145 void i40iw_copy_ip_ntohl(u32 *dst, __be32 *src)
146 {
147 *dst++ = ntohl(*src++);
148 *dst++ = ntohl(*src++);
149 *dst++ = ntohl(*src++);
150 *dst = ntohl(*src);
151 }
152
153 /**
154 * i40iw_copy_ip_htonl - change host addr to network ip
155 * @dst: host ip
156 * @src: little endian
157 */
158 static inline void i40iw_copy_ip_htonl(__be32 *dst, u32 *src)
159 {
160 *dst++ = htonl(*src++);
161 *dst++ = htonl(*src++);
162 *dst++ = htonl(*src++);
163 *dst = htonl(*src);
164 }
165
166 /**
167 * i40iw_fill_sockaddr4 - get addr info for passive connection
168 * @cm_node: connection's node
169 * @event: upper layer's cm event
170 */
171 static inline void i40iw_fill_sockaddr4(struct i40iw_cm_node *cm_node,
172 struct iw_cm_event *event)
173 {
174 struct sockaddr_in *laddr = (struct sockaddr_in *)&event->local_addr;
175 struct sockaddr_in *raddr = (struct sockaddr_in *)&event->remote_addr;
176
177 laddr->sin_family = AF_INET;
178 raddr->sin_family = AF_INET;
179
180 laddr->sin_port = htons(cm_node->loc_port);
181 raddr->sin_port = htons(cm_node->rem_port);
182
183 laddr->sin_addr.s_addr = htonl(cm_node->loc_addr[0]);
184 raddr->sin_addr.s_addr = htonl(cm_node->rem_addr[0]);
185 }
186
187 /**
188 * i40iw_fill_sockaddr6 - get ipv6 addr info for passive side
189 * @cm_node: connection's node
190 * @event: upper layer's cm event
191 */
192 static inline void i40iw_fill_sockaddr6(struct i40iw_cm_node *cm_node,
193 struct iw_cm_event *event)
194 {
195 struct sockaddr_in6 *laddr6 = (struct sockaddr_in6 *)&event->local_addr;
196 struct sockaddr_in6 *raddr6 = (struct sockaddr_in6 *)&event->remote_addr;
197
198 laddr6->sin6_family = AF_INET6;
199 raddr6->sin6_family = AF_INET6;
200
201 laddr6->sin6_port = htons(cm_node->loc_port);
202 raddr6->sin6_port = htons(cm_node->rem_port);
203
204 i40iw_copy_ip_htonl(laddr6->sin6_addr.in6_u.u6_addr32,
205 cm_node->loc_addr);
206 i40iw_copy_ip_htonl(raddr6->sin6_addr.in6_u.u6_addr32,
207 cm_node->rem_addr);
208 }
209
210 /**
211 * i40iw_get_addr_info
212 * @cm_node: contains ip/tcp info
213 * @cm_info: to get a copy of the cm_node ip/tcp info
214 */
215 static void i40iw_get_addr_info(struct i40iw_cm_node *cm_node,
216 struct i40iw_cm_info *cm_info)
217 {
218 cm_info->ipv4 = cm_node->ipv4;
219 cm_info->vlan_id = cm_node->vlan_id;
220 memcpy(cm_info->loc_addr, cm_node->loc_addr, sizeof(cm_info->loc_addr));
221 memcpy(cm_info->rem_addr, cm_node->rem_addr, sizeof(cm_info->rem_addr));
222 cm_info->loc_port = cm_node->loc_port;
223 cm_info->rem_port = cm_node->rem_port;
224 }
225
226 /**
227 * i40iw_get_cmevent_info - for cm event upcall
228 * @cm_node: connection's node
229 * @cm_id: upper layers cm struct for the event
230 * @event: upper layer's cm event
231 */
232 static inline void i40iw_get_cmevent_info(struct i40iw_cm_node *cm_node,
233 struct iw_cm_id *cm_id,
234 struct iw_cm_event *event)
235 {
236 memcpy(&event->local_addr, &cm_id->m_local_addr,
237 sizeof(event->local_addr));
238 memcpy(&event->remote_addr, &cm_id->m_remote_addr,
239 sizeof(event->remote_addr));
240 if (cm_node) {
241 event->private_data = (void *)cm_node->pdata_buf;
242 event->private_data_len = (u8)cm_node->pdata.size;
243 event->ird = cm_node->ird_size;
244 event->ord = cm_node->ord_size;
245 }
246 }
247
248 /**
249 * i40iw_send_cm_event - upcall cm's event handler
250 * @cm_node: connection's node
251 * @cm_id: upper layer's cm info struct
252 * @type: Event type to indicate
253 * @status: status for the event type
254 */
255 static int i40iw_send_cm_event(struct i40iw_cm_node *cm_node,
256 struct iw_cm_id *cm_id,
257 enum iw_cm_event_type type,
258 int status)
259 {
260 struct iw_cm_event event;
261
262 memset(&event, 0, sizeof(event));
263 event.event = type;
264 event.status = status;
265 switch (type) {
266 case IW_CM_EVENT_CONNECT_REQUEST:
267 if (cm_node->ipv4)
268 i40iw_fill_sockaddr4(cm_node, &event);
269 else
270 i40iw_fill_sockaddr6(cm_node, &event);
271 event.provider_data = (void *)cm_node;
272 event.private_data = (void *)cm_node->pdata_buf;
273 event.private_data_len = (u8)cm_node->pdata.size;
274 break;
275 case IW_CM_EVENT_CONNECT_REPLY:
276 i40iw_get_cmevent_info(cm_node, cm_id, &event);
277 break;
278 case IW_CM_EVENT_ESTABLISHED:
279 event.ird = cm_node->ird_size;
280 event.ord = cm_node->ord_size;
281 break;
282 case IW_CM_EVENT_DISCONNECT:
283 break;
284 case IW_CM_EVENT_CLOSE:
285 break;
286 default:
287 i40iw_pr_err("event type received type = %d\n", type);
288 return -1;
289 }
290 return cm_id->event_handler(cm_id, &event);
291 }
292
293 /**
294 * i40iw_create_event - create cm event
295 * @cm_node: connection's node
296 * @type: Event type to generate
297 */
298 static struct i40iw_cm_event *i40iw_create_event(struct i40iw_cm_node *cm_node,
299 enum i40iw_cm_event_type type)
300 {
301 struct i40iw_cm_event *event;
302
303 if (!cm_node->cm_id)
304 return NULL;
305
306 event = kzalloc(sizeof(*event), GFP_ATOMIC);
307
308 if (!event)
309 return NULL;
310
311 event->type = type;
312 event->cm_node = cm_node;
313 memcpy(event->cm_info.rem_addr, cm_node->rem_addr, sizeof(event->cm_info.rem_addr));
314 memcpy(event->cm_info.loc_addr, cm_node->loc_addr, sizeof(event->cm_info.loc_addr));
315 event->cm_info.rem_port = cm_node->rem_port;
316 event->cm_info.loc_port = cm_node->loc_port;
317 event->cm_info.cm_id = cm_node->cm_id;
318
319 i40iw_debug(cm_node->dev,
320 I40IW_DEBUG_CM,
321 "node=%p event=%p type=%u dst=%pI4 src=%pI4\n",
322 cm_node,
323 event,
324 type,
325 event->cm_info.loc_addr,
326 event->cm_info.rem_addr);
327
328 i40iw_cm_post_event(event);
329 return event;
330 }
331
332 /**
333 * i40iw_free_retrans_entry - free send entry
334 * @cm_node: connection's node
335 */
336 static void i40iw_free_retrans_entry(struct i40iw_cm_node *cm_node)
337 {
338 struct i40iw_sc_dev *dev = cm_node->dev;
339 struct i40iw_timer_entry *send_entry;
340
341 send_entry = cm_node->send_entry;
342 if (send_entry) {
343 cm_node->send_entry = NULL;
344 i40iw_free_sqbuf(dev, (void *)send_entry->sqbuf);
345 kfree(send_entry);
346 atomic_dec(&cm_node->ref_count);
347 }
348 }
349
350 /**
351 * i40iw_cleanup_retrans_entry - free send entry with lock
352 * @cm_node: connection's node
353 */
354 static void i40iw_cleanup_retrans_entry(struct i40iw_cm_node *cm_node)
355 {
356 unsigned long flags;
357
358 spin_lock_irqsave(&cm_node->retrans_list_lock, flags);
359 i40iw_free_retrans_entry(cm_node);
360 spin_unlock_irqrestore(&cm_node->retrans_list_lock, flags);
361 }
362
363 static bool is_remote_ne020_or_chelsio(struct i40iw_cm_node *cm_node)
364 {
365 if ((cm_node->rem_mac[0] == 0x0) &&
366 (((cm_node->rem_mac[1] == 0x12) && (cm_node->rem_mac[2] == 0x55)) ||
367 ((cm_node->rem_mac[1] == 0x07 && (cm_node->rem_mac[2] == 0x43)))))
368 return true;
369 return false;
370 }
371
372 /**
373 * i40iw_form_cm_frame - get a free packet and build frame
374 * @cm_node: connection's node ionfo to use in frame
375 * @options: pointer to options info
376 * @hdr: pointer mpa header
377 * @pdata: pointer to private data
378 * @flags: indicates FIN or ACK
379 */
380 static struct i40iw_puda_buf *i40iw_form_cm_frame(struct i40iw_cm_node *cm_node,
381 struct i40iw_kmem_info *options,
382 struct i40iw_kmem_info *hdr,
383 struct i40iw_kmem_info *pdata,
384 u8 flags)
385 {
386 struct i40iw_puda_buf *sqbuf;
387 struct i40iw_sc_dev *dev = cm_node->dev;
388 u8 *buf;
389
390 struct tcphdr *tcph;
391 struct iphdr *iph;
392 struct ipv6hdr *ip6h;
393 struct ethhdr *ethh;
394 u16 packetsize;
395 u16 eth_hlen = ETH_HLEN;
396 u32 opts_len = 0;
397 u32 pd_len = 0;
398 u32 hdr_len = 0;
399
400 sqbuf = i40iw_puda_get_bufpool(dev->ilq);
401 if (!sqbuf)
402 return NULL;
403 buf = sqbuf->mem.va;
404
405 if (options)
406 opts_len = (u32)options->size;
407
408 if (hdr)
409 hdr_len = hdr->size;
410
411 if (pdata) {
412 pd_len = pdata->size;
413 if (!is_remote_ne020_or_chelsio(cm_node))
414 pd_len += MPA_ZERO_PAD_LEN;
415 }
416
417 if (cm_node->vlan_id < VLAN_TAG_PRESENT)
418 eth_hlen += 4;
419
420 if (cm_node->ipv4)
421 packetsize = sizeof(*iph) + sizeof(*tcph);
422 else
423 packetsize = sizeof(*ip6h) + sizeof(*tcph);
424 packetsize += opts_len + hdr_len + pd_len;
425
426 memset(buf, 0x00, eth_hlen + packetsize);
427
428 sqbuf->totallen = packetsize + eth_hlen;
429 sqbuf->maclen = eth_hlen;
430 sqbuf->tcphlen = sizeof(*tcph) + opts_len;
431 sqbuf->scratch = (void *)cm_node;
432
433 ethh = (struct ethhdr *)buf;
434 buf += eth_hlen;
435
436 if (cm_node->ipv4) {
437 sqbuf->ipv4 = true;
438
439 iph = (struct iphdr *)buf;
440 buf += sizeof(*iph);
441 tcph = (struct tcphdr *)buf;
442 buf += sizeof(*tcph);
443
444 ether_addr_copy(ethh->h_dest, cm_node->rem_mac);
445 ether_addr_copy(ethh->h_source, cm_node->loc_mac);
446 if (cm_node->vlan_id < VLAN_TAG_PRESENT) {
447 ((struct vlan_ethhdr *)ethh)->h_vlan_proto = htons(ETH_P_8021Q);
448 ((struct vlan_ethhdr *)ethh)->h_vlan_TCI = htons(cm_node->vlan_id);
449
450 ((struct vlan_ethhdr *)ethh)->h_vlan_encapsulated_proto = htons(ETH_P_IP);
451 } else {
452 ethh->h_proto = htons(ETH_P_IP);
453 }
454
455 iph->version = IPVERSION;
456 iph->ihl = 5; /* 5 * 4Byte words, IP headr len */
457 iph->tos = 0;
458 iph->tot_len = htons(packetsize);
459 iph->id = htons(++cm_node->tcp_cntxt.loc_id);
460
461 iph->frag_off = htons(0x4000);
462 iph->ttl = 0x40;
463 iph->protocol = IPPROTO_TCP;
464 iph->saddr = htonl(cm_node->loc_addr[0]);
465 iph->daddr = htonl(cm_node->rem_addr[0]);
466 } else {
467 sqbuf->ipv4 = false;
468 ip6h = (struct ipv6hdr *)buf;
469 buf += sizeof(*ip6h);
470 tcph = (struct tcphdr *)buf;
471 buf += sizeof(*tcph);
472
473 ether_addr_copy(ethh->h_dest, cm_node->rem_mac);
474 ether_addr_copy(ethh->h_source, cm_node->loc_mac);
475 if (cm_node->vlan_id < VLAN_TAG_PRESENT) {
476 ((struct vlan_ethhdr *)ethh)->h_vlan_proto = htons(ETH_P_8021Q);
477 ((struct vlan_ethhdr *)ethh)->h_vlan_TCI = htons(cm_node->vlan_id);
478 ((struct vlan_ethhdr *)ethh)->h_vlan_encapsulated_proto = htons(ETH_P_IPV6);
479 } else {
480 ethh->h_proto = htons(ETH_P_IPV6);
481 }
482 ip6h->version = 6;
483 ip6h->flow_lbl[0] = 0;
484 ip6h->flow_lbl[1] = 0;
485 ip6h->flow_lbl[2] = 0;
486 ip6h->payload_len = htons(packetsize - sizeof(*ip6h));
487 ip6h->nexthdr = 6;
488 ip6h->hop_limit = 128;
489 i40iw_copy_ip_htonl(ip6h->saddr.in6_u.u6_addr32,
490 cm_node->loc_addr);
491 i40iw_copy_ip_htonl(ip6h->daddr.in6_u.u6_addr32,
492 cm_node->rem_addr);
493 }
494
495 tcph->source = htons(cm_node->loc_port);
496 tcph->dest = htons(cm_node->rem_port);
497
498 tcph->seq = htonl(cm_node->tcp_cntxt.loc_seq_num);
499
500 if (flags & SET_ACK) {
501 cm_node->tcp_cntxt.loc_ack_num = cm_node->tcp_cntxt.rcv_nxt;
502 tcph->ack_seq = htonl(cm_node->tcp_cntxt.loc_ack_num);
503 tcph->ack = 1;
504 } else {
505 tcph->ack_seq = 0;
506 }
507
508 if (flags & SET_SYN) {
509 cm_node->tcp_cntxt.loc_seq_num++;
510 tcph->syn = 1;
511 } else {
512 cm_node->tcp_cntxt.loc_seq_num += hdr_len + pd_len;
513 }
514
515 if (flags & SET_FIN) {
516 cm_node->tcp_cntxt.loc_seq_num++;
517 tcph->fin = 1;
518 }
519
520 if (flags & SET_RST)
521 tcph->rst = 1;
522
523 tcph->doff = (u16)((sizeof(*tcph) + opts_len + 3) >> 2);
524 sqbuf->tcphlen = tcph->doff << 2;
525 tcph->window = htons(cm_node->tcp_cntxt.rcv_wnd);
526 tcph->urg_ptr = 0;
527
528 if (opts_len) {
529 memcpy(buf, options->addr, opts_len);
530 buf += opts_len;
531 }
532
533 if (hdr_len) {
534 memcpy(buf, hdr->addr, hdr_len);
535 buf += hdr_len;
536 }
537
538 if (pd_len)
539 memcpy(buf, pdata->addr, pd_len);
540
541 atomic_set(&sqbuf->refcount, 1);
542
543 return sqbuf;
544 }
545
546 /**
547 * i40iw_send_reset - Send RST packet
548 * @cm_node: connection's node
549 */
550 static int i40iw_send_reset(struct i40iw_cm_node *cm_node)
551 {
552 struct i40iw_puda_buf *sqbuf;
553 int flags = SET_RST | SET_ACK;
554
555 sqbuf = i40iw_form_cm_frame(cm_node, NULL, NULL, NULL, flags);
556 if (!sqbuf) {
557 i40iw_pr_err("no sqbuf\n");
558 return -1;
559 }
560
561 return i40iw_schedule_cm_timer(cm_node, sqbuf, I40IW_TIMER_TYPE_SEND, 0, 1);
562 }
563
564 /**
565 * i40iw_active_open_err - send event for active side cm error
566 * @cm_node: connection's node
567 * @reset: Flag to send reset or not
568 */
569 static void i40iw_active_open_err(struct i40iw_cm_node *cm_node, bool reset)
570 {
571 i40iw_cleanup_retrans_entry(cm_node);
572 cm_node->cm_core->stats_connect_errs++;
573 if (reset) {
574 i40iw_debug(cm_node->dev,
575 I40IW_DEBUG_CM,
576 "%s cm_node=%p state=%d\n",
577 __func__,
578 cm_node,
579 cm_node->state);
580 atomic_inc(&cm_node->ref_count);
581 i40iw_send_reset(cm_node);
582 }
583
584 cm_node->state = I40IW_CM_STATE_CLOSED;
585 i40iw_create_event(cm_node, I40IW_CM_EVENT_ABORTED);
586 }
587
588 /**
589 * i40iw_passive_open_err - handle passive side cm error
590 * @cm_node: connection's node
591 * @reset: send reset or just free cm_node
592 */
593 static void i40iw_passive_open_err(struct i40iw_cm_node *cm_node, bool reset)
594 {
595 i40iw_cleanup_retrans_entry(cm_node);
596 cm_node->cm_core->stats_passive_errs++;
597 cm_node->state = I40IW_CM_STATE_CLOSED;
598 i40iw_debug(cm_node->dev,
599 I40IW_DEBUG_CM,
600 "%s cm_node=%p state =%d\n",
601 __func__,
602 cm_node,
603 cm_node->state);
604 if (reset)
605 i40iw_send_reset(cm_node);
606 else
607 i40iw_rem_ref_cm_node(cm_node);
608 }
609
610 /**
611 * i40iw_event_connect_error - to create connect error event
612 * @event: cm information for connect event
613 */
614 static void i40iw_event_connect_error(struct i40iw_cm_event *event)
615 {
616 struct i40iw_qp *iwqp;
617 struct iw_cm_id *cm_id;
618
619 cm_id = event->cm_node->cm_id;
620 if (!cm_id)
621 return;
622
623 iwqp = cm_id->provider_data;
624
625 if (!iwqp || !iwqp->iwdev)
626 return;
627
628 iwqp->cm_id = NULL;
629 cm_id->provider_data = NULL;
630 i40iw_send_cm_event(event->cm_node, cm_id,
631 IW_CM_EVENT_CONNECT_REPLY,
632 -ECONNRESET);
633 cm_id->rem_ref(cm_id);
634 i40iw_rem_ref_cm_node(event->cm_node);
635 }
636
637 /**
638 * i40iw_process_options
639 * @cm_node: connection's node
640 * @optionsloc: point to start of options
641 * @optionsize: size of all options
642 * @syn_packet: flag if syn packet
643 */
644 static int i40iw_process_options(struct i40iw_cm_node *cm_node,
645 u8 *optionsloc,
646 u32 optionsize,
647 u32 syn_packet)
648 {
649 u32 tmp;
650 u32 offset = 0;
651 union all_known_options *all_options;
652 char got_mss_option = 0;
653
654 while (offset < optionsize) {
655 all_options = (union all_known_options *)(optionsloc + offset);
656 switch (all_options->as_base.optionnum) {
657 case OPTION_NUMBER_END:
658 offset = optionsize;
659 break;
660 case OPTION_NUMBER_NONE:
661 offset += 1;
662 continue;
663 case OPTION_NUMBER_MSS:
664 i40iw_debug(cm_node->dev,
665 I40IW_DEBUG_CM,
666 "%s: MSS Length: %d Offset: %d Size: %d\n",
667 __func__,
668 all_options->as_mss.length,
669 offset,
670 optionsize);
671 got_mss_option = 1;
672 if (all_options->as_mss.length != 4)
673 return -1;
674 tmp = ntohs(all_options->as_mss.mss);
675 if (tmp > 0 && tmp < cm_node->tcp_cntxt.mss)
676 cm_node->tcp_cntxt.mss = tmp;
677 break;
678 case OPTION_NUMBER_WINDOW_SCALE:
679 cm_node->tcp_cntxt.snd_wscale =
680 all_options->as_windowscale.shiftcount;
681 break;
682 default:
683 i40iw_debug(cm_node->dev,
684 I40IW_DEBUG_CM,
685 "TCP Option not understood: %x\n",
686 all_options->as_base.optionnum);
687 break;
688 }
689 offset += all_options->as_base.length;
690 }
691 if (!got_mss_option && syn_packet)
692 cm_node->tcp_cntxt.mss = I40IW_CM_DEFAULT_MSS;
693 return 0;
694 }
695
696 /**
697 * i40iw_handle_tcp_options -
698 * @cm_node: connection's node
699 * @tcph: pointer tcp header
700 * @optionsize: size of options rcvd
701 * @passive: active or passive flag
702 */
703 static int i40iw_handle_tcp_options(struct i40iw_cm_node *cm_node,
704 struct tcphdr *tcph,
705 int optionsize,
706 int passive)
707 {
708 u8 *optionsloc = (u8 *)&tcph[1];
709
710 if (optionsize) {
711 if (i40iw_process_options(cm_node,
712 optionsloc,
713 optionsize,
714 (u32)tcph->syn)) {
715 i40iw_debug(cm_node->dev,
716 I40IW_DEBUG_CM,
717 "%s: Node %p, Sending RESET\n",
718 __func__,
719 cm_node);
720 if (passive)
721 i40iw_passive_open_err(cm_node, true);
722 else
723 i40iw_active_open_err(cm_node, true);
724 return -1;
725 }
726 }
727
728 cm_node->tcp_cntxt.snd_wnd = ntohs(tcph->window) <<
729 cm_node->tcp_cntxt.snd_wscale;
730
731 if (cm_node->tcp_cntxt.snd_wnd > cm_node->tcp_cntxt.max_snd_wnd)
732 cm_node->tcp_cntxt.max_snd_wnd = cm_node->tcp_cntxt.snd_wnd;
733 return 0;
734 }
735
736 /**
737 * i40iw_build_mpa_v1 - build a MPA V1 frame
738 * @cm_node: connection's node
739 * @mpa_key: to do read0 or write0
740 */
741 static void i40iw_build_mpa_v1(struct i40iw_cm_node *cm_node,
742 void *start_addr,
743 u8 mpa_key)
744 {
745 struct ietf_mpa_v1 *mpa_frame = (struct ietf_mpa_v1 *)start_addr;
746
747 switch (mpa_key) {
748 case MPA_KEY_REQUEST:
749 memcpy(mpa_frame->key, IEFT_MPA_KEY_REQ, IETF_MPA_KEY_SIZE);
750 break;
751 case MPA_KEY_REPLY:
752 memcpy(mpa_frame->key, IEFT_MPA_KEY_REP, IETF_MPA_KEY_SIZE);
753 break;
754 default:
755 break;
756 }
757 mpa_frame->flags = IETF_MPA_FLAGS_CRC;
758 mpa_frame->rev = cm_node->mpa_frame_rev;
759 mpa_frame->priv_data_len = htons(cm_node->pdata.size);
760 }
761
762 /**
763 * i40iw_build_mpa_v2 - build a MPA V2 frame
764 * @cm_node: connection's node
765 * @start_addr: buffer start address
766 * @mpa_key: to do read0 or write0
767 */
768 static void i40iw_build_mpa_v2(struct i40iw_cm_node *cm_node,
769 void *start_addr,
770 u8 mpa_key)
771 {
772 struct ietf_mpa_v2 *mpa_frame = (struct ietf_mpa_v2 *)start_addr;
773 struct ietf_rtr_msg *rtr_msg = &mpa_frame->rtr_msg;
774
775 /* initialize the upper 5 bytes of the frame */
776 i40iw_build_mpa_v1(cm_node, start_addr, mpa_key);
777 mpa_frame->flags |= IETF_MPA_V2_FLAG;
778 mpa_frame->priv_data_len += htons(IETF_RTR_MSG_SIZE);
779
780 /* initialize RTR msg */
781 if (cm_node->mpav2_ird_ord == IETF_NO_IRD_ORD) {
782 rtr_msg->ctrl_ird = IETF_NO_IRD_ORD;
783 rtr_msg->ctrl_ord = IETF_NO_IRD_ORD;
784 } else {
785 rtr_msg->ctrl_ird = (cm_node->ird_size > IETF_NO_IRD_ORD) ?
786 IETF_NO_IRD_ORD : cm_node->ird_size;
787 rtr_msg->ctrl_ord = (cm_node->ord_size > IETF_NO_IRD_ORD) ?
788 IETF_NO_IRD_ORD : cm_node->ord_size;
789 }
790
791 rtr_msg->ctrl_ird |= IETF_PEER_TO_PEER;
792 rtr_msg->ctrl_ird |= IETF_FLPDU_ZERO_LEN;
793
794 switch (mpa_key) {
795 case MPA_KEY_REQUEST:
796 rtr_msg->ctrl_ord |= IETF_RDMA0_WRITE;
797 rtr_msg->ctrl_ord |= IETF_RDMA0_READ;
798 break;
799 case MPA_KEY_REPLY:
800 switch (cm_node->send_rdma0_op) {
801 case SEND_RDMA_WRITE_ZERO:
802 rtr_msg->ctrl_ord |= IETF_RDMA0_WRITE;
803 break;
804 case SEND_RDMA_READ_ZERO:
805 rtr_msg->ctrl_ord |= IETF_RDMA0_READ;
806 break;
807 }
808 break;
809 default:
810 break;
811 }
812 rtr_msg->ctrl_ird = htons(rtr_msg->ctrl_ird);
813 rtr_msg->ctrl_ord = htons(rtr_msg->ctrl_ord);
814 }
815
816 /**
817 * i40iw_cm_build_mpa_frame - build mpa frame for mpa version 1 or version 2
818 * @cm_node: connection's node
819 * @mpa: mpa: data buffer
820 * @mpa_key: to do read0 or write0
821 */
822 static int i40iw_cm_build_mpa_frame(struct i40iw_cm_node *cm_node,
823 struct i40iw_kmem_info *mpa,
824 u8 mpa_key)
825 {
826 int hdr_len = 0;
827
828 switch (cm_node->mpa_frame_rev) {
829 case IETF_MPA_V1:
830 hdr_len = sizeof(struct ietf_mpa_v1);
831 i40iw_build_mpa_v1(cm_node, mpa->addr, mpa_key);
832 break;
833 case IETF_MPA_V2:
834 hdr_len = sizeof(struct ietf_mpa_v2);
835 i40iw_build_mpa_v2(cm_node, mpa->addr, mpa_key);
836 break;
837 default:
838 break;
839 }
840
841 return hdr_len;
842 }
843
844 /**
845 * i40iw_send_mpa_request - active node send mpa request to passive node
846 * @cm_node: connection's node
847 */
848 static int i40iw_send_mpa_request(struct i40iw_cm_node *cm_node)
849 {
850 struct i40iw_puda_buf *sqbuf;
851
852 if (!cm_node) {
853 i40iw_pr_err("cm_node == NULL\n");
854 return -1;
855 }
856
857 cm_node->mpa_hdr.addr = &cm_node->mpa_frame;
858 cm_node->mpa_hdr.size = i40iw_cm_build_mpa_frame(cm_node,
859 &cm_node->mpa_hdr,
860 MPA_KEY_REQUEST);
861 if (!cm_node->mpa_hdr.size) {
862 i40iw_pr_err("mpa size = %d\n", cm_node->mpa_hdr.size);
863 return -1;
864 }
865
866 sqbuf = i40iw_form_cm_frame(cm_node,
867 NULL,
868 &cm_node->mpa_hdr,
869 &cm_node->pdata,
870 SET_ACK);
871 if (!sqbuf) {
872 i40iw_pr_err("sq_buf == NULL\n");
873 return -1;
874 }
875 return i40iw_schedule_cm_timer(cm_node, sqbuf, I40IW_TIMER_TYPE_SEND, 1, 0);
876 }
877
878 /**
879 * i40iw_send_mpa_reject -
880 * @cm_node: connection's node
881 * @pdata: reject data for connection
882 * @plen: length of reject data
883 */
884 static int i40iw_send_mpa_reject(struct i40iw_cm_node *cm_node,
885 const void *pdata,
886 u8 plen)
887 {
888 struct i40iw_puda_buf *sqbuf;
889 struct i40iw_kmem_info priv_info;
890
891 cm_node->mpa_hdr.addr = &cm_node->mpa_frame;
892 cm_node->mpa_hdr.size = i40iw_cm_build_mpa_frame(cm_node,
893 &cm_node->mpa_hdr,
894 MPA_KEY_REPLY);
895
896 cm_node->mpa_frame.flags |= IETF_MPA_FLAGS_REJECT;
897 priv_info.addr = (void *)pdata;
898 priv_info.size = plen;
899
900 sqbuf = i40iw_form_cm_frame(cm_node,
901 NULL,
902 &cm_node->mpa_hdr,
903 &priv_info,
904 SET_ACK | SET_FIN);
905 if (!sqbuf) {
906 i40iw_pr_err("no sqbuf\n");
907 return -ENOMEM;
908 }
909 cm_node->state = I40IW_CM_STATE_FIN_WAIT1;
910 return i40iw_schedule_cm_timer(cm_node, sqbuf, I40IW_TIMER_TYPE_SEND, 1, 0);
911 }
912
913 /**
914 * recv_mpa - process an IETF MPA frame
915 * @cm_node: connection's node
916 * @buffer: Data pointer
917 * @type: to return accept or reject
918 * @len: Len of mpa buffer
919 */
920 static int i40iw_parse_mpa(struct i40iw_cm_node *cm_node, u8 *buffer, u32 *type, u32 len)
921 {
922 struct ietf_mpa_v1 *mpa_frame;
923 struct ietf_mpa_v2 *mpa_v2_frame;
924 struct ietf_rtr_msg *rtr_msg;
925 int mpa_hdr_len;
926 int priv_data_len;
927
928 *type = I40IW_MPA_REQUEST_ACCEPT;
929
930 if (len < sizeof(struct ietf_mpa_v1)) {
931 i40iw_pr_err("ietf buffer small (%x)\n", len);
932 return -1;
933 }
934
935 mpa_frame = (struct ietf_mpa_v1 *)buffer;
936 mpa_hdr_len = sizeof(struct ietf_mpa_v1);
937 priv_data_len = ntohs(mpa_frame->priv_data_len);
938
939 if (priv_data_len > IETF_MAX_PRIV_DATA_LEN) {
940 i40iw_pr_err("large pri_data %d\n", priv_data_len);
941 return -1;
942 }
943 if (mpa_frame->rev != IETF_MPA_V1 && mpa_frame->rev != IETF_MPA_V2) {
944 i40iw_pr_err("unsupported mpa rev = %d\n", mpa_frame->rev);
945 return -1;
946 }
947 if (mpa_frame->rev > cm_node->mpa_frame_rev) {
948 i40iw_pr_err("rev %d\n", mpa_frame->rev);
949 return -1;
950 }
951 cm_node->mpa_frame_rev = mpa_frame->rev;
952
953 if (cm_node->state != I40IW_CM_STATE_MPAREQ_SENT) {
954 if (memcmp(mpa_frame->key, IEFT_MPA_KEY_REQ, IETF_MPA_KEY_SIZE)) {
955 i40iw_pr_err("Unexpected MPA Key received\n");
956 return -1;
957 }
958 } else {
959 if (memcmp(mpa_frame->key, IEFT_MPA_KEY_REP, IETF_MPA_KEY_SIZE)) {
960 i40iw_pr_err("Unexpected MPA Key received\n");
961 return -1;
962 }
963 }
964
965 if (priv_data_len + mpa_hdr_len > len) {
966 i40iw_pr_err("ietf buffer len(%x + %x != %x)\n",
967 priv_data_len, mpa_hdr_len, len);
968 return -1;
969 }
970 if (len > MAX_CM_BUFFER) {
971 i40iw_pr_err("ietf buffer large len = %d\n", len);
972 return -1;
973 }
974
975 switch (mpa_frame->rev) {
976 case IETF_MPA_V2:{
977 u16 ird_size;
978 u16 ord_size;
979 u16 ctrl_ord;
980 u16 ctrl_ird;
981
982 mpa_v2_frame = (struct ietf_mpa_v2 *)buffer;
983 mpa_hdr_len += IETF_RTR_MSG_SIZE;
984 rtr_msg = &mpa_v2_frame->rtr_msg;
985
986 /* parse rtr message */
987 ctrl_ord = ntohs(rtr_msg->ctrl_ord);
988 ctrl_ird = ntohs(rtr_msg->ctrl_ird);
989 ird_size = ctrl_ird & IETF_NO_IRD_ORD;
990 ord_size = ctrl_ord & IETF_NO_IRD_ORD;
991
992 if (!(ctrl_ird & IETF_PEER_TO_PEER))
993 return -1;
994
995 if (ird_size == IETF_NO_IRD_ORD || ord_size == IETF_NO_IRD_ORD) {
996 cm_node->mpav2_ird_ord = IETF_NO_IRD_ORD;
997 goto negotiate_done;
998 }
999
1000 if (cm_node->state != I40IW_CM_STATE_MPAREQ_SENT) {
1001 /* responder */
1002 if (!ord_size && (ctrl_ord & IETF_RDMA0_READ))
1003 cm_node->ird_size = 1;
1004 if (cm_node->ord_size > ird_size)
1005 cm_node->ord_size = ird_size;
1006 } else {
1007 /* initiator */
1008 if (!ird_size && (ctrl_ord & IETF_RDMA0_READ))
1009 return -1;
1010 if (cm_node->ord_size > ird_size)
1011 cm_node->ord_size = ird_size;
1012
1013 if (cm_node->ird_size < ord_size)
1014 /* no resources available */
1015 return -1;
1016 }
1017
1018 negotiate_done:
1019 if (ctrl_ord & IETF_RDMA0_READ)
1020 cm_node->send_rdma0_op = SEND_RDMA_READ_ZERO;
1021 else if (ctrl_ord & IETF_RDMA0_WRITE)
1022 cm_node->send_rdma0_op = SEND_RDMA_WRITE_ZERO;
1023 else /* Not supported RDMA0 operation */
1024 return -1;
1025 i40iw_debug(cm_node->dev, I40IW_DEBUG_CM,
1026 "MPAV2: Negotiated ORD: %d, IRD: %d\n",
1027 cm_node->ord_size, cm_node->ird_size);
1028 break;
1029 }
1030 break;
1031 case IETF_MPA_V1:
1032 default:
1033 break;
1034 }
1035
1036 memcpy(cm_node->pdata_buf, buffer + mpa_hdr_len, priv_data_len);
1037 cm_node->pdata.size = priv_data_len;
1038
1039 if (mpa_frame->flags & IETF_MPA_FLAGS_REJECT)
1040 *type = I40IW_MPA_REQUEST_REJECT;
1041
1042 if (mpa_frame->flags & IETF_MPA_FLAGS_MARKERS)
1043 cm_node->snd_mark_en = true;
1044
1045 return 0;
1046 }
1047
1048 /**
1049 * i40iw_schedule_cm_timer
1050 * @@cm_node: connection's node
1051 * @sqbuf: buffer to send
1052 * @type: if it es send ot close
1053 * @send_retrans: if rexmits to be done
1054 * @close_when_complete: is cm_node to be removed
1055 *
1056 * note - cm_node needs to be protected before calling this. Encase in:
1057 * i40iw_rem_ref_cm_node(cm_core, cm_node);
1058 * i40iw_schedule_cm_timer(...)
1059 * atomic_inc(&cm_node->ref_count);
1060 */
1061 int i40iw_schedule_cm_timer(struct i40iw_cm_node *cm_node,
1062 struct i40iw_puda_buf *sqbuf,
1063 enum i40iw_timer_type type,
1064 int send_retrans,
1065 int close_when_complete)
1066 {
1067 struct i40iw_sc_dev *dev = cm_node->dev;
1068 struct i40iw_cm_core *cm_core = cm_node->cm_core;
1069 struct i40iw_timer_entry *new_send;
1070 int ret = 0;
1071 u32 was_timer_set;
1072 unsigned long flags;
1073
1074 new_send = kzalloc(sizeof(*new_send), GFP_ATOMIC);
1075 if (!new_send) {
1076 i40iw_free_sqbuf(cm_node->dev, (void *)sqbuf);
1077 return -ENOMEM;
1078 }
1079 new_send->retrycount = I40IW_DEFAULT_RETRYS;
1080 new_send->retranscount = I40IW_DEFAULT_RETRANS;
1081 new_send->sqbuf = sqbuf;
1082 new_send->timetosend = jiffies;
1083 new_send->type = type;
1084 new_send->send_retrans = send_retrans;
1085 new_send->close_when_complete = close_when_complete;
1086
1087 if (type == I40IW_TIMER_TYPE_CLOSE) {
1088 new_send->timetosend += (HZ / 10);
1089 if (cm_node->close_entry) {
1090 kfree(new_send);
1091 i40iw_free_sqbuf(cm_node->dev, (void *)sqbuf);
1092 i40iw_pr_err("already close entry\n");
1093 return -EINVAL;
1094 }
1095 cm_node->close_entry = new_send;
1096 }
1097
1098 if (type == I40IW_TIMER_TYPE_SEND) {
1099 spin_lock_irqsave(&cm_node->retrans_list_lock, flags);
1100 cm_node->send_entry = new_send;
1101 atomic_inc(&cm_node->ref_count);
1102 spin_unlock_irqrestore(&cm_node->retrans_list_lock, flags);
1103 new_send->timetosend = jiffies + I40IW_RETRY_TIMEOUT;
1104
1105 atomic_inc(&sqbuf->refcount);
1106 i40iw_puda_send_buf(dev->ilq, sqbuf);
1107 if (!send_retrans) {
1108 i40iw_cleanup_retrans_entry(cm_node);
1109 if (close_when_complete)
1110 i40iw_rem_ref_cm_node(cm_node);
1111 return ret;
1112 }
1113 }
1114
1115 spin_lock_irqsave(&cm_core->ht_lock, flags);
1116 was_timer_set = timer_pending(&cm_core->tcp_timer);
1117
1118 if (!was_timer_set) {
1119 cm_core->tcp_timer.expires = new_send->timetosend;
1120 add_timer(&cm_core->tcp_timer);
1121 }
1122 spin_unlock_irqrestore(&cm_core->ht_lock, flags);
1123
1124 return ret;
1125 }
1126
1127 /**
1128 * i40iw_retrans_expired - Could not rexmit the packet
1129 * @cm_node: connection's node
1130 */
1131 static void i40iw_retrans_expired(struct i40iw_cm_node *cm_node)
1132 {
1133 struct iw_cm_id *cm_id = cm_node->cm_id;
1134 enum i40iw_cm_node_state state = cm_node->state;
1135
1136 cm_node->state = I40IW_CM_STATE_CLOSED;
1137 switch (state) {
1138 case I40IW_CM_STATE_SYN_RCVD:
1139 case I40IW_CM_STATE_CLOSING:
1140 i40iw_rem_ref_cm_node(cm_node);
1141 break;
1142 case I40IW_CM_STATE_FIN_WAIT1:
1143 case I40IW_CM_STATE_LAST_ACK:
1144 if (cm_node->cm_id)
1145 cm_id->rem_ref(cm_id);
1146 i40iw_send_reset(cm_node);
1147 break;
1148 default:
1149 atomic_inc(&cm_node->ref_count);
1150 i40iw_send_reset(cm_node);
1151 i40iw_create_event(cm_node, I40IW_CM_EVENT_ABORTED);
1152 break;
1153 }
1154 }
1155
1156 /**
1157 * i40iw_handle_close_entry - for handling retry/timeouts
1158 * @cm_node: connection's node
1159 * @rem_node: flag for remove cm_node
1160 */
1161 static void i40iw_handle_close_entry(struct i40iw_cm_node *cm_node, u32 rem_node)
1162 {
1163 struct i40iw_timer_entry *close_entry = cm_node->close_entry;
1164 struct iw_cm_id *cm_id = cm_node->cm_id;
1165 struct i40iw_qp *iwqp;
1166 unsigned long flags;
1167
1168 if (!close_entry)
1169 return;
1170 iwqp = (struct i40iw_qp *)close_entry->sqbuf;
1171 if (iwqp) {
1172 spin_lock_irqsave(&iwqp->lock, flags);
1173 if (iwqp->cm_id) {
1174 iwqp->hw_tcp_state = I40IW_TCP_STATE_CLOSED;
1175 iwqp->hw_iwarp_state = I40IW_QP_STATE_ERROR;
1176 iwqp->last_aeq = I40IW_AE_RESET_SENT;
1177 iwqp->ibqp_state = IB_QPS_ERR;
1178 spin_unlock_irqrestore(&iwqp->lock, flags);
1179 i40iw_cm_disconn(iwqp);
1180 } else {
1181 spin_unlock_irqrestore(&iwqp->lock, flags);
1182 }
1183 } else if (rem_node) {
1184 /* TIME_WAIT state */
1185 i40iw_rem_ref_cm_node(cm_node);
1186 }
1187 if (cm_id)
1188 cm_id->rem_ref(cm_id);
1189 kfree(close_entry);
1190 cm_node->close_entry = NULL;
1191 }
1192
1193 /**
1194 * i40iw_cm_timer_tick - system's timer expired callback
1195 * @pass: Pointing to cm_core
1196 */
1197 static void i40iw_cm_timer_tick(unsigned long pass)
1198 {
1199 unsigned long nexttimeout = jiffies + I40IW_LONG_TIME;
1200 struct i40iw_cm_node *cm_node;
1201 struct i40iw_timer_entry *send_entry, *close_entry;
1202 struct list_head *list_core_temp;
1203 struct list_head *list_node;
1204 struct i40iw_cm_core *cm_core = (struct i40iw_cm_core *)pass;
1205 u32 settimer = 0;
1206 unsigned long timetosend;
1207 struct i40iw_sc_dev *dev;
1208 unsigned long flags;
1209
1210 struct list_head timer_list;
1211
1212 INIT_LIST_HEAD(&timer_list);
1213 spin_lock_irqsave(&cm_core->ht_lock, flags);
1214
1215 list_for_each_safe(list_node, list_core_temp, &cm_core->connected_nodes) {
1216 cm_node = container_of(list_node, struct i40iw_cm_node, list);
1217 if (cm_node->close_entry || cm_node->send_entry) {
1218 atomic_inc(&cm_node->ref_count);
1219 list_add(&cm_node->timer_entry, &timer_list);
1220 }
1221 }
1222 spin_unlock_irqrestore(&cm_core->ht_lock, flags);
1223
1224 list_for_each_safe(list_node, list_core_temp, &timer_list) {
1225 cm_node = container_of(list_node,
1226 struct i40iw_cm_node,
1227 timer_entry);
1228 close_entry = cm_node->close_entry;
1229
1230 if (close_entry) {
1231 if (time_after(close_entry->timetosend, jiffies)) {
1232 if (nexttimeout > close_entry->timetosend ||
1233 !settimer) {
1234 nexttimeout = close_entry->timetosend;
1235 settimer = 1;
1236 }
1237 } else {
1238 i40iw_handle_close_entry(cm_node, 1);
1239 }
1240 }
1241
1242 spin_lock_irqsave(&cm_node->retrans_list_lock, flags);
1243
1244 send_entry = cm_node->send_entry;
1245 if (!send_entry)
1246 goto done;
1247 if (time_after(send_entry->timetosend, jiffies)) {
1248 if (cm_node->state != I40IW_CM_STATE_OFFLOADED) {
1249 if ((nexttimeout > send_entry->timetosend) ||
1250 !settimer) {
1251 nexttimeout = send_entry->timetosend;
1252 settimer = 1;
1253 }
1254 } else {
1255 i40iw_free_retrans_entry(cm_node);
1256 }
1257 goto done;
1258 }
1259
1260 if ((cm_node->state == I40IW_CM_STATE_OFFLOADED) ||
1261 (cm_node->state == I40IW_CM_STATE_CLOSED)) {
1262 i40iw_free_retrans_entry(cm_node);
1263 goto done;
1264 }
1265
1266 if (!send_entry->retranscount || !send_entry->retrycount) {
1267 i40iw_free_retrans_entry(cm_node);
1268
1269 spin_unlock_irqrestore(&cm_node->retrans_list_lock, flags);
1270 i40iw_retrans_expired(cm_node);
1271 cm_node->state = I40IW_CM_STATE_CLOSED;
1272 spin_lock_irqsave(&cm_node->retrans_list_lock, flags);
1273 goto done;
1274 }
1275 cm_node->cm_core->stats_pkt_retrans++;
1276 spin_unlock_irqrestore(&cm_node->retrans_list_lock, flags);
1277
1278 dev = cm_node->dev;
1279 atomic_inc(&send_entry->sqbuf->refcount);
1280 i40iw_puda_send_buf(dev->ilq, send_entry->sqbuf);
1281 spin_lock_irqsave(&cm_node->retrans_list_lock, flags);
1282 if (send_entry->send_retrans) {
1283 send_entry->retranscount--;
1284 timetosend = (I40IW_RETRY_TIMEOUT <<
1285 (I40IW_DEFAULT_RETRANS -
1286 send_entry->retranscount));
1287
1288 send_entry->timetosend = jiffies +
1289 min(timetosend, I40IW_MAX_TIMEOUT);
1290 if (nexttimeout > send_entry->timetosend || !settimer) {
1291 nexttimeout = send_entry->timetosend;
1292 settimer = 1;
1293 }
1294 } else {
1295 int close_when_complete;
1296
1297 close_when_complete = send_entry->close_when_complete;
1298 i40iw_debug(cm_node->dev,
1299 I40IW_DEBUG_CM,
1300 "cm_node=%p state=%d\n",
1301 cm_node,
1302 cm_node->state);
1303 i40iw_free_retrans_entry(cm_node);
1304 if (close_when_complete)
1305 i40iw_rem_ref_cm_node(cm_node);
1306 }
1307 done:
1308 spin_unlock_irqrestore(&cm_node->retrans_list_lock, flags);
1309 i40iw_rem_ref_cm_node(cm_node);
1310 }
1311
1312 if (settimer) {
1313 spin_lock_irqsave(&cm_core->ht_lock, flags);
1314 if (!timer_pending(&cm_core->tcp_timer)) {
1315 cm_core->tcp_timer.expires = nexttimeout;
1316 add_timer(&cm_core->tcp_timer);
1317 }
1318 spin_unlock_irqrestore(&cm_core->ht_lock, flags);
1319 }
1320 }
1321
1322 /**
1323 * i40iw_send_syn - send SYN packet
1324 * @cm_node: connection's node
1325 * @sendack: flag to set ACK bit or not
1326 */
1327 int i40iw_send_syn(struct i40iw_cm_node *cm_node, u32 sendack)
1328 {
1329 struct i40iw_puda_buf *sqbuf;
1330 int flags = SET_SYN;
1331 char optionsbuffer[sizeof(struct option_mss) +
1332 sizeof(struct option_windowscale) +
1333 sizeof(struct option_base) + TCP_OPTIONS_PADDING];
1334 struct i40iw_kmem_info opts;
1335
1336 int optionssize = 0;
1337 /* Sending MSS option */
1338 union all_known_options *options;
1339
1340 opts.addr = optionsbuffer;
1341 if (!cm_node) {
1342 i40iw_pr_err("no cm_node\n");
1343 return -EINVAL;
1344 }
1345
1346 options = (union all_known_options *)&optionsbuffer[optionssize];
1347 options->as_mss.optionnum = OPTION_NUMBER_MSS;
1348 options->as_mss.length = sizeof(struct option_mss);
1349 options->as_mss.mss = htons(cm_node->tcp_cntxt.mss);
1350 optionssize += sizeof(struct option_mss);
1351
1352 options = (union all_known_options *)&optionsbuffer[optionssize];
1353 options->as_windowscale.optionnum = OPTION_NUMBER_WINDOW_SCALE;
1354 options->as_windowscale.length = sizeof(struct option_windowscale);
1355 options->as_windowscale.shiftcount = cm_node->tcp_cntxt.rcv_wscale;
1356 optionssize += sizeof(struct option_windowscale);
1357 options = (union all_known_options *)&optionsbuffer[optionssize];
1358 options->as_end = OPTION_NUMBER_END;
1359 optionssize += 1;
1360
1361 if (sendack)
1362 flags |= SET_ACK;
1363
1364 opts.size = optionssize;
1365
1366 sqbuf = i40iw_form_cm_frame(cm_node, &opts, NULL, NULL, flags);
1367 if (!sqbuf) {
1368 i40iw_pr_err("no sqbuf\n");
1369 return -1;
1370 }
1371 return i40iw_schedule_cm_timer(cm_node, sqbuf, I40IW_TIMER_TYPE_SEND, 1, 0);
1372 }
1373
1374 /**
1375 * i40iw_send_ack - Send ACK packet
1376 * @cm_node: connection's node
1377 */
1378 static void i40iw_send_ack(struct i40iw_cm_node *cm_node)
1379 {
1380 struct i40iw_puda_buf *sqbuf;
1381
1382 sqbuf = i40iw_form_cm_frame(cm_node, NULL, NULL, NULL, SET_ACK);
1383 if (sqbuf)
1384 i40iw_puda_send_buf(cm_node->dev->ilq, sqbuf);
1385 else
1386 i40iw_pr_err("no sqbuf\n");
1387 }
1388
1389 /**
1390 * i40iw_send_fin - Send FIN pkt
1391 * @cm_node: connection's node
1392 */
1393 static int i40iw_send_fin(struct i40iw_cm_node *cm_node)
1394 {
1395 struct i40iw_puda_buf *sqbuf;
1396
1397 sqbuf = i40iw_form_cm_frame(cm_node, NULL, NULL, NULL, SET_ACK | SET_FIN);
1398 if (!sqbuf) {
1399 i40iw_pr_err("no sqbuf\n");
1400 return -1;
1401 }
1402 return i40iw_schedule_cm_timer(cm_node, sqbuf, I40IW_TIMER_TYPE_SEND, 1, 0);
1403 }
1404
1405 /**
1406 * i40iw_find_node - find a cm node that matches the reference cm node
1407 * @cm_core: cm's core
1408 * @rem_port: remote tcp port num
1409 * @rem_addr: remote ip addr
1410 * @loc_port: local tcp port num
1411 * @loc_addr: loc ip addr
1412 * @add_refcnt: flag to increment refcount of cm_node
1413 */
1414 struct i40iw_cm_node *i40iw_find_node(struct i40iw_cm_core *cm_core,
1415 u16 rem_port,
1416 u32 *rem_addr,
1417 u16 loc_port,
1418 u32 *loc_addr,
1419 bool add_refcnt)
1420 {
1421 struct list_head *hte;
1422 struct i40iw_cm_node *cm_node;
1423 unsigned long flags;
1424
1425 hte = &cm_core->connected_nodes;
1426
1427 /* walk list and find cm_node associated with this session ID */
1428 spin_lock_irqsave(&cm_core->ht_lock, flags);
1429 list_for_each_entry(cm_node, hte, list) {
1430 if (!memcmp(cm_node->loc_addr, loc_addr, sizeof(cm_node->loc_addr)) &&
1431 (cm_node->loc_port == loc_port) &&
1432 !memcmp(cm_node->rem_addr, rem_addr, sizeof(cm_node->rem_addr)) &&
1433 (cm_node->rem_port == rem_port)) {
1434 if (add_refcnt)
1435 atomic_inc(&cm_node->ref_count);
1436 spin_unlock_irqrestore(&cm_core->ht_lock, flags);
1437 return cm_node;
1438 }
1439 }
1440 spin_unlock_irqrestore(&cm_core->ht_lock, flags);
1441
1442 /* no owner node */
1443 return NULL;
1444 }
1445
1446 /**
1447 * i40iw_find_listener - find a cm node listening on this addr-port pair
1448 * @cm_core: cm's core
1449 * @dst_port: listener tcp port num
1450 * @dst_addr: listener ip addr
1451 * @listener_state: state to match with listen node's
1452 */
1453 static struct i40iw_cm_listener *i40iw_find_listener(
1454 struct i40iw_cm_core *cm_core,
1455 u32 *dst_addr,
1456 u16 dst_port,
1457 u16 vlan_id,
1458 enum i40iw_cm_listener_state
1459 listener_state)
1460 {
1461 struct i40iw_cm_listener *listen_node;
1462 static const u32 ip_zero[4] = { 0, 0, 0, 0 };
1463 u32 listen_addr[4];
1464 u16 listen_port;
1465 unsigned long flags;
1466
1467 /* walk list and find cm_node associated with this session ID */
1468 spin_lock_irqsave(&cm_core->listen_list_lock, flags);
1469 list_for_each_entry(listen_node, &cm_core->listen_nodes, list) {
1470 memcpy(listen_addr, listen_node->loc_addr, sizeof(listen_addr));
1471 listen_port = listen_node->loc_port;
1472 /* compare node pair, return node handle if a match */
1473 if ((!memcmp(listen_addr, dst_addr, sizeof(listen_addr)) ||
1474 !memcmp(listen_addr, ip_zero, sizeof(listen_addr))) &&
1475 (listen_port == dst_port) &&
1476 (listener_state & listen_node->listener_state)) {
1477 atomic_inc(&listen_node->ref_count);
1478 spin_unlock_irqrestore(&cm_core->listen_list_lock, flags);
1479 return listen_node;
1480 }
1481 }
1482 spin_unlock_irqrestore(&cm_core->listen_list_lock, flags);
1483 return NULL;
1484 }
1485
1486 /**
1487 * i40iw_add_hte_node - add a cm node to the hash table
1488 * @cm_core: cm's core
1489 * @cm_node: connection's node
1490 */
1491 static void i40iw_add_hte_node(struct i40iw_cm_core *cm_core,
1492 struct i40iw_cm_node *cm_node)
1493 {
1494 struct list_head *hte;
1495 unsigned long flags;
1496
1497 if (!cm_node || !cm_core) {
1498 i40iw_pr_err("cm_node or cm_core == NULL\n");
1499 return;
1500 }
1501 spin_lock_irqsave(&cm_core->ht_lock, flags);
1502
1503 /* get a handle on the hash table element (list head for this slot) */
1504 hte = &cm_core->connected_nodes;
1505 list_add_tail(&cm_node->list, hte);
1506 spin_unlock_irqrestore(&cm_core->ht_lock, flags);
1507 }
1508
1509 /**
1510 * listen_port_in_use - determine if port is in use
1511 * @port: Listen port number
1512 */
1513 static bool i40iw_listen_port_in_use(struct i40iw_cm_core *cm_core, u16 port)
1514 {
1515 struct i40iw_cm_listener *listen_node;
1516 unsigned long flags;
1517 bool ret = false;
1518
1519 spin_lock_irqsave(&cm_core->listen_list_lock, flags);
1520 list_for_each_entry(listen_node, &cm_core->listen_nodes, list) {
1521 if (listen_node->loc_port == port) {
1522 ret = true;
1523 break;
1524 }
1525 }
1526 spin_unlock_irqrestore(&cm_core->listen_list_lock, flags);
1527 return ret;
1528 }
1529
1530 /**
1531 * i40iw_del_multiple_qhash - Remove qhash and child listens
1532 * @iwdev: iWarp device
1533 * @cm_info: CM info for parent listen node
1534 * @cm_parent_listen_node: The parent listen node
1535 */
1536 static enum i40iw_status_code i40iw_del_multiple_qhash(
1537 struct i40iw_device *iwdev,
1538 struct i40iw_cm_info *cm_info,
1539 struct i40iw_cm_listener *cm_parent_listen_node)
1540 {
1541 struct i40iw_cm_listener *child_listen_node;
1542 enum i40iw_status_code ret = I40IW_ERR_CONFIG;
1543 struct list_head *pos, *tpos;
1544 unsigned long flags;
1545
1546 spin_lock_irqsave(&iwdev->cm_core.listen_list_lock, flags);
1547 list_for_each_safe(pos, tpos, &cm_parent_listen_node->child_listen_list) {
1548 child_listen_node = list_entry(pos, struct i40iw_cm_listener, child_listen_list);
1549 if (child_listen_node->ipv4)
1550 i40iw_debug(&iwdev->sc_dev,
1551 I40IW_DEBUG_CM,
1552 "removing child listen for IP=%pI4, port=%d, vlan=%d\n",
1553 child_listen_node->loc_addr,
1554 child_listen_node->loc_port,
1555 child_listen_node->vlan_id);
1556 else
1557 i40iw_debug(&iwdev->sc_dev, I40IW_DEBUG_CM,
1558 "removing child listen for IP=%pI6, port=%d, vlan=%d\n",
1559 child_listen_node->loc_addr,
1560 child_listen_node->loc_port,
1561 child_listen_node->vlan_id);
1562 list_del(pos);
1563 memcpy(cm_info->loc_addr, child_listen_node->loc_addr,
1564 sizeof(cm_info->loc_addr));
1565 cm_info->vlan_id = child_listen_node->vlan_id;
1566 ret = i40iw_manage_qhash(iwdev, cm_info,
1567 I40IW_QHASH_TYPE_TCP_SYN,
1568 I40IW_QHASH_MANAGE_TYPE_DELETE, NULL, false);
1569 kfree(child_listen_node);
1570 cm_parent_listen_node->cm_core->stats_listen_nodes_destroyed++;
1571 i40iw_debug(&iwdev->sc_dev,
1572 I40IW_DEBUG_CM,
1573 "freed pointer = %p\n",
1574 child_listen_node);
1575 }
1576 spin_unlock_irqrestore(&iwdev->cm_core.listen_list_lock, flags);
1577
1578 return ret;
1579 }
1580
1581 /**
1582 * i40iw_netdev_vlan_ipv6 - Gets the netdev and mac
1583 * @addr: local IPv6 address
1584 * @vlan_id: vlan id for the given IPv6 address
1585 * @mac: mac address for the given IPv6 address
1586 *
1587 * Returns the net_device of the IPv6 address and also sets the
1588 * vlan id and mac for that address.
1589 */
1590 static struct net_device *i40iw_netdev_vlan_ipv6(u32 *addr, u16 *vlan_id, u8 *mac)
1591 {
1592 struct net_device *ip_dev = NULL;
1593 #if IS_ENABLED(CONFIG_IPV6)
1594 struct in6_addr laddr6;
1595
1596 i40iw_copy_ip_htonl(laddr6.in6_u.u6_addr32, addr);
1597 if (vlan_id)
1598 *vlan_id = I40IW_NO_VLAN;
1599 if (mac)
1600 eth_zero_addr(mac);
1601 rcu_read_lock();
1602 for_each_netdev_rcu(&init_net, ip_dev) {
1603 if (ipv6_chk_addr(&init_net, &laddr6, ip_dev, 1)) {
1604 if (vlan_id)
1605 *vlan_id = rdma_vlan_dev_vlan_id(ip_dev);
1606 if (ip_dev->dev_addr && mac)
1607 ether_addr_copy(mac, ip_dev->dev_addr);
1608 break;
1609 }
1610 }
1611 rcu_read_unlock();
1612 #endif
1613 return ip_dev;
1614 }
1615
1616 /**
1617 * i40iw_get_vlan_ipv4 - Returns the vlan_id for IPv4 address
1618 * @addr: local IPv4 address
1619 */
1620 static u16 i40iw_get_vlan_ipv4(u32 *addr)
1621 {
1622 struct net_device *netdev;
1623 u16 vlan_id = I40IW_NO_VLAN;
1624
1625 netdev = ip_dev_find(&init_net, htonl(addr[0]));
1626 if (netdev) {
1627 vlan_id = rdma_vlan_dev_vlan_id(netdev);
1628 dev_put(netdev);
1629 }
1630 return vlan_id;
1631 }
1632
1633 /**
1634 * i40iw_add_mqh_6 - Adds multiple qhashes for IPv6
1635 * @iwdev: iWarp device
1636 * @cm_info: CM info for parent listen node
1637 * @cm_parent_listen_node: The parent listen node
1638 *
1639 * Adds a qhash and a child listen node for every IPv6 address
1640 * on the adapter and adds the associated qhash filter
1641 */
1642 static enum i40iw_status_code i40iw_add_mqh_6(struct i40iw_device *iwdev,
1643 struct i40iw_cm_info *cm_info,
1644 struct i40iw_cm_listener *cm_parent_listen_node)
1645 {
1646 struct net_device *ip_dev;
1647 struct inet6_dev *idev;
1648 struct inet6_ifaddr *ifp;
1649 enum i40iw_status_code ret = 0;
1650 struct i40iw_cm_listener *child_listen_node;
1651 unsigned long flags;
1652
1653 rtnl_lock();
1654 for_each_netdev_rcu(&init_net, ip_dev) {
1655 if ((((rdma_vlan_dev_vlan_id(ip_dev) < I40IW_NO_VLAN) &&
1656 (rdma_vlan_dev_real_dev(ip_dev) == iwdev->netdev)) ||
1657 (ip_dev == iwdev->netdev)) && (ip_dev->flags & IFF_UP)) {
1658 idev = __in6_dev_get(ip_dev);
1659 if (!idev) {
1660 i40iw_pr_err("idev == NULL\n");
1661 break;
1662 }
1663 list_for_each_entry(ifp, &idev->addr_list, if_list) {
1664 i40iw_debug(&iwdev->sc_dev,
1665 I40IW_DEBUG_CM,
1666 "IP=%pI6, vlan_id=%d, MAC=%pM\n",
1667 &ifp->addr,
1668 rdma_vlan_dev_vlan_id(ip_dev),
1669 ip_dev->dev_addr);
1670 child_listen_node =
1671 kzalloc(sizeof(*child_listen_node), GFP_ATOMIC);
1672 i40iw_debug(&iwdev->sc_dev,
1673 I40IW_DEBUG_CM,
1674 "Allocating child listener %p\n",
1675 child_listen_node);
1676 if (!child_listen_node) {
1677 i40iw_pr_err("listener memory allocation\n");
1678 ret = I40IW_ERR_NO_MEMORY;
1679 goto exit;
1680 }
1681 cm_info->vlan_id = rdma_vlan_dev_vlan_id(ip_dev);
1682 cm_parent_listen_node->vlan_id = cm_info->vlan_id;
1683
1684 memcpy(child_listen_node, cm_parent_listen_node,
1685 sizeof(*child_listen_node));
1686
1687 i40iw_copy_ip_ntohl(child_listen_node->loc_addr,
1688 ifp->addr.in6_u.u6_addr32);
1689 memcpy(cm_info->loc_addr, child_listen_node->loc_addr,
1690 sizeof(cm_info->loc_addr));
1691
1692 ret = i40iw_manage_qhash(iwdev, cm_info,
1693 I40IW_QHASH_TYPE_TCP_SYN,
1694 I40IW_QHASH_MANAGE_TYPE_ADD,
1695 NULL, true);
1696 if (!ret) {
1697 spin_lock_irqsave(&iwdev->cm_core.listen_list_lock, flags);
1698 list_add(&child_listen_node->child_listen_list,
1699 &cm_parent_listen_node->child_listen_list);
1700 spin_unlock_irqrestore(&iwdev->cm_core.listen_list_lock, flags);
1701 cm_parent_listen_node->cm_core->stats_listen_nodes_created++;
1702 } else {
1703 kfree(child_listen_node);
1704 }
1705 }
1706 }
1707 }
1708 exit:
1709 rtnl_unlock();
1710 return ret;
1711 }
1712
1713 /**
1714 * i40iw_add_mqh_4 - Adds multiple qhashes for IPv4
1715 * @iwdev: iWarp device
1716 * @cm_info: CM info for parent listen node
1717 * @cm_parent_listen_node: The parent listen node
1718 *
1719 * Adds a qhash and a child listen node for every IPv4 address
1720 * on the adapter and adds the associated qhash filter
1721 */
1722 static enum i40iw_status_code i40iw_add_mqh_4(
1723 struct i40iw_device *iwdev,
1724 struct i40iw_cm_info *cm_info,
1725 struct i40iw_cm_listener *cm_parent_listen_node)
1726 {
1727 struct net_device *dev;
1728 struct in_device *idev;
1729 struct i40iw_cm_listener *child_listen_node;
1730 enum i40iw_status_code ret = 0;
1731 unsigned long flags;
1732
1733 rtnl_lock();
1734 for_each_netdev(&init_net, dev) {
1735 if ((((rdma_vlan_dev_vlan_id(dev) < I40IW_NO_VLAN) &&
1736 (rdma_vlan_dev_real_dev(dev) == iwdev->netdev)) ||
1737 (dev == iwdev->netdev)) && (dev->flags & IFF_UP)) {
1738 idev = in_dev_get(dev);
1739 for_ifa(idev) {
1740 i40iw_debug(&iwdev->sc_dev,
1741 I40IW_DEBUG_CM,
1742 "Allocating child CM Listener forIP=%pI4, vlan_id=%d, MAC=%pM\n",
1743 &ifa->ifa_address,
1744 rdma_vlan_dev_vlan_id(dev),
1745 dev->dev_addr);
1746 child_listen_node = kzalloc(sizeof(*child_listen_node), GFP_ATOMIC);
1747 cm_parent_listen_node->cm_core->stats_listen_nodes_created++;
1748 i40iw_debug(&iwdev->sc_dev,
1749 I40IW_DEBUG_CM,
1750 "Allocating child listener %p\n",
1751 child_listen_node);
1752 if (!child_listen_node) {
1753 i40iw_pr_err("listener memory allocation\n");
1754 in_dev_put(idev);
1755 ret = I40IW_ERR_NO_MEMORY;
1756 goto exit;
1757 }
1758 cm_info->vlan_id = rdma_vlan_dev_vlan_id(dev);
1759 cm_parent_listen_node->vlan_id = cm_info->vlan_id;
1760 memcpy(child_listen_node,
1761 cm_parent_listen_node,
1762 sizeof(*child_listen_node));
1763
1764 child_listen_node->loc_addr[0] = ntohl(ifa->ifa_address);
1765 memcpy(cm_info->loc_addr, child_listen_node->loc_addr,
1766 sizeof(cm_info->loc_addr));
1767
1768 ret = i40iw_manage_qhash(iwdev,
1769 cm_info,
1770 I40IW_QHASH_TYPE_TCP_SYN,
1771 I40IW_QHASH_MANAGE_TYPE_ADD,
1772 NULL,
1773 true);
1774 if (!ret) {
1775 spin_lock_irqsave(&iwdev->cm_core.listen_list_lock, flags);
1776 list_add(&child_listen_node->child_listen_list,
1777 &cm_parent_listen_node->child_listen_list);
1778 spin_unlock_irqrestore(&iwdev->cm_core.listen_list_lock, flags);
1779 } else {
1780 kfree(child_listen_node);
1781 cm_parent_listen_node->cm_core->stats_listen_nodes_created--;
1782 }
1783 }
1784 endfor_ifa(idev);
1785 in_dev_put(idev);
1786 }
1787 }
1788 exit:
1789 rtnl_unlock();
1790 return ret;
1791 }
1792
1793 /**
1794 * i40iw_dec_refcnt_listen - delete listener and associated cm nodes
1795 * @cm_core: cm's core
1796 * @free_hanging_nodes: to free associated cm_nodes
1797 * @apbvt_del: flag to delete the apbvt
1798 */
1799 static int i40iw_dec_refcnt_listen(struct i40iw_cm_core *cm_core,
1800 struct i40iw_cm_listener *listener,
1801 int free_hanging_nodes, bool apbvt_del)
1802 {
1803 int ret = -EINVAL;
1804 int err = 0;
1805 struct list_head *list_pos;
1806 struct list_head *list_temp;
1807 struct i40iw_cm_node *cm_node;
1808 struct list_head reset_list;
1809 struct i40iw_cm_info nfo;
1810 struct i40iw_cm_node *loopback;
1811 enum i40iw_cm_node_state old_state;
1812 unsigned long flags;
1813
1814 /* free non-accelerated child nodes for this listener */
1815 INIT_LIST_HEAD(&reset_list);
1816 if (free_hanging_nodes) {
1817 spin_lock_irqsave(&cm_core->ht_lock, flags);
1818 list_for_each_safe(list_pos, list_temp, &cm_core->connected_nodes) {
1819 cm_node = container_of(list_pos, struct i40iw_cm_node, list);
1820 if ((cm_node->listener == listener) && !cm_node->accelerated) {
1821 atomic_inc(&cm_node->ref_count);
1822 list_add(&cm_node->reset_entry, &reset_list);
1823 }
1824 }
1825 spin_unlock_irqrestore(&cm_core->ht_lock, flags);
1826 }
1827
1828 list_for_each_safe(list_pos, list_temp, &reset_list) {
1829 cm_node = container_of(list_pos, struct i40iw_cm_node, reset_entry);
1830 loopback = cm_node->loopbackpartner;
1831 if (cm_node->state >= I40IW_CM_STATE_FIN_WAIT1) {
1832 i40iw_rem_ref_cm_node(cm_node);
1833 } else {
1834 if (!loopback) {
1835 i40iw_cleanup_retrans_entry(cm_node);
1836 err = i40iw_send_reset(cm_node);
1837 if (err) {
1838 cm_node->state = I40IW_CM_STATE_CLOSED;
1839 i40iw_pr_err("send reset\n");
1840 } else {
1841 old_state = cm_node->state;
1842 cm_node->state = I40IW_CM_STATE_LISTENER_DESTROYED;
1843 if (old_state != I40IW_CM_STATE_MPAREQ_RCVD)
1844 i40iw_rem_ref_cm_node(cm_node);
1845 }
1846 } else {
1847 struct i40iw_cm_event event;
1848
1849 event.cm_node = loopback;
1850 memcpy(event.cm_info.rem_addr,
1851 loopback->rem_addr, sizeof(event.cm_info.rem_addr));
1852 memcpy(event.cm_info.loc_addr,
1853 loopback->loc_addr, sizeof(event.cm_info.loc_addr));
1854 event.cm_info.rem_port = loopback->rem_port;
1855 event.cm_info.loc_port = loopback->loc_port;
1856 event.cm_info.cm_id = loopback->cm_id;
1857 event.cm_info.ipv4 = loopback->ipv4;
1858 atomic_inc(&loopback->ref_count);
1859 loopback->state = I40IW_CM_STATE_CLOSED;
1860 i40iw_event_connect_error(&event);
1861 cm_node->state = I40IW_CM_STATE_LISTENER_DESTROYED;
1862 i40iw_rem_ref_cm_node(cm_node);
1863 }
1864 }
1865 }
1866
1867 if (!atomic_dec_return(&listener->ref_count)) {
1868 spin_lock_irqsave(&cm_core->listen_list_lock, flags);
1869 list_del(&listener->list);
1870 spin_unlock_irqrestore(&cm_core->listen_list_lock, flags);
1871
1872 if (listener->iwdev) {
1873 if (apbvt_del && !i40iw_listen_port_in_use(cm_core, listener->loc_port))
1874 i40iw_manage_apbvt(listener->iwdev,
1875 listener->loc_port,
1876 I40IW_MANAGE_APBVT_DEL);
1877
1878 memcpy(nfo.loc_addr, listener->loc_addr, sizeof(nfo.loc_addr));
1879 nfo.loc_port = listener->loc_port;
1880 nfo.ipv4 = listener->ipv4;
1881 nfo.vlan_id = listener->vlan_id;
1882
1883 if (!list_empty(&listener->child_listen_list)) {
1884 i40iw_del_multiple_qhash(listener->iwdev, &nfo, listener);
1885 } else {
1886 if (listener->qhash_set)
1887 i40iw_manage_qhash(listener->iwdev,
1888 &nfo,
1889 I40IW_QHASH_TYPE_TCP_SYN,
1890 I40IW_QHASH_MANAGE_TYPE_DELETE,
1891 NULL,
1892 false);
1893 }
1894 }
1895
1896 cm_core->stats_listen_destroyed++;
1897 kfree(listener);
1898 cm_core->stats_listen_nodes_destroyed++;
1899 listener = NULL;
1900 ret = 0;
1901 }
1902
1903 if (listener) {
1904 if (atomic_read(&listener->pend_accepts_cnt) > 0)
1905 i40iw_debug(cm_core->dev,
1906 I40IW_DEBUG_CM,
1907 "%s: listener (%p) pending accepts=%u\n",
1908 __func__,
1909 listener,
1910 atomic_read(&listener->pend_accepts_cnt));
1911 }
1912
1913 return ret;
1914 }
1915
1916 /**
1917 * i40iw_cm_del_listen - delete a linstener
1918 * @cm_core: cm's core
1919 * @listener: passive connection's listener
1920 * @apbvt_del: flag to delete apbvt
1921 */
1922 static int i40iw_cm_del_listen(struct i40iw_cm_core *cm_core,
1923 struct i40iw_cm_listener *listener,
1924 bool apbvt_del)
1925 {
1926 listener->listener_state = I40IW_CM_LISTENER_PASSIVE_STATE;
1927 listener->cm_id = NULL; /* going to be destroyed pretty soon */
1928 return i40iw_dec_refcnt_listen(cm_core, listener, 1, apbvt_del);
1929 }
1930
1931 /**
1932 * i40iw_addr_resolve_neigh - resolve neighbor address
1933 * @iwdev: iwarp device structure
1934 * @src_ip: local ip address
1935 * @dst_ip: remote ip address
1936 * @arpindex: if there is an arp entry
1937 */
1938 static int i40iw_addr_resolve_neigh(struct i40iw_device *iwdev,
1939 u32 src_ip,
1940 u32 dst_ip,
1941 int arpindex)
1942 {
1943 struct rtable *rt;
1944 struct neighbour *neigh;
1945 int rc = arpindex;
1946 struct net_device *netdev = iwdev->netdev;
1947 __be32 dst_ipaddr = htonl(dst_ip);
1948 __be32 src_ipaddr = htonl(src_ip);
1949
1950 rt = ip_route_output(&init_net, dst_ipaddr, src_ipaddr, 0, 0);
1951 if (IS_ERR(rt)) {
1952 i40iw_pr_err("ip_route_output\n");
1953 return rc;
1954 }
1955
1956 if (netif_is_bond_slave(netdev))
1957 netdev = netdev_master_upper_dev_get(netdev);
1958
1959 neigh = dst_neigh_lookup(&rt->dst, &dst_ipaddr);
1960
1961 rcu_read_lock();
1962 if (neigh) {
1963 if (neigh->nud_state & NUD_VALID) {
1964 if (arpindex >= 0) {
1965 if (ether_addr_equal(iwdev->arp_table[arpindex].mac_addr,
1966 neigh->ha))
1967 /* Mac address same as arp table */
1968 goto resolve_neigh_exit;
1969 i40iw_manage_arp_cache(iwdev,
1970 iwdev->arp_table[arpindex].mac_addr,
1971 &dst_ip,
1972 true,
1973 I40IW_ARP_DELETE);
1974 }
1975
1976 i40iw_manage_arp_cache(iwdev, neigh->ha, &dst_ip, true, I40IW_ARP_ADD);
1977 rc = i40iw_arp_table(iwdev, &dst_ip, true, NULL, I40IW_ARP_RESOLVE);
1978 } else {
1979 neigh_event_send(neigh, NULL);
1980 }
1981 }
1982 resolve_neigh_exit:
1983
1984 rcu_read_unlock();
1985 if (neigh)
1986 neigh_release(neigh);
1987
1988 ip_rt_put(rt);
1989 return rc;
1990 }
1991
1992 /**
1993 * i40iw_get_dst_ipv6
1994 */
1995 static struct dst_entry *i40iw_get_dst_ipv6(struct sockaddr_in6 *src_addr,
1996 struct sockaddr_in6 *dst_addr)
1997 {
1998 struct dst_entry *dst;
1999 struct flowi6 fl6;
2000
2001 memset(&fl6, 0, sizeof(fl6));
2002 fl6.daddr = dst_addr->sin6_addr;
2003 fl6.saddr = src_addr->sin6_addr;
2004 if (ipv6_addr_type(&fl6.daddr) & IPV6_ADDR_LINKLOCAL)
2005 fl6.flowi6_oif = dst_addr->sin6_scope_id;
2006
2007 dst = ip6_route_output(&init_net, NULL, &fl6);
2008 return dst;
2009 }
2010
2011 /**
2012 * i40iw_addr_resolve_neigh_ipv6 - resolve neighbor ipv6 address
2013 * @iwdev: iwarp device structure
2014 * @dst_ip: remote ip address
2015 * @arpindex: if there is an arp entry
2016 */
2017 static int i40iw_addr_resolve_neigh_ipv6(struct i40iw_device *iwdev,
2018 u32 *src,
2019 u32 *dest,
2020 int arpindex)
2021 {
2022 struct neighbour *neigh;
2023 int rc = arpindex;
2024 struct net_device *netdev = iwdev->netdev;
2025 struct dst_entry *dst;
2026 struct sockaddr_in6 dst_addr;
2027 struct sockaddr_in6 src_addr;
2028
2029 memset(&dst_addr, 0, sizeof(dst_addr));
2030 dst_addr.sin6_family = AF_INET6;
2031 i40iw_copy_ip_htonl(dst_addr.sin6_addr.in6_u.u6_addr32, dest);
2032 memset(&src_addr, 0, sizeof(src_addr));
2033 src_addr.sin6_family = AF_INET6;
2034 i40iw_copy_ip_htonl(src_addr.sin6_addr.in6_u.u6_addr32, src);
2035 dst = i40iw_get_dst_ipv6(&src_addr, &dst_addr);
2036 if (!dst || dst->error) {
2037 if (dst) {
2038 dst_release(dst);
2039 i40iw_pr_err("ip6_route_output returned dst->error = %d\n",
2040 dst->error);
2041 }
2042 return rc;
2043 }
2044
2045 if (netif_is_bond_slave(netdev))
2046 netdev = netdev_master_upper_dev_get(netdev);
2047
2048 neigh = dst_neigh_lookup(dst, &dst_addr);
2049
2050 rcu_read_lock();
2051 if (neigh) {
2052 i40iw_debug(&iwdev->sc_dev, I40IW_DEBUG_CM, "dst_neigh_lookup MAC=%pM\n", neigh->ha);
2053 if (neigh->nud_state & NUD_VALID) {
2054 if (arpindex >= 0) {
2055 if (ether_addr_equal
2056 (iwdev->arp_table[arpindex].mac_addr,
2057 neigh->ha)) {
2058 /* Mac address same as in arp table */
2059 goto resolve_neigh_exit6;
2060 }
2061 i40iw_manage_arp_cache(iwdev,
2062 iwdev->arp_table[arpindex].mac_addr,
2063 dest,
2064 false,
2065 I40IW_ARP_DELETE);
2066 }
2067 i40iw_manage_arp_cache(iwdev,
2068 neigh->ha,
2069 dest,
2070 false,
2071 I40IW_ARP_ADD);
2072 rc = i40iw_arp_table(iwdev,
2073 dest,
2074 false,
2075 NULL,
2076 I40IW_ARP_RESOLVE);
2077 } else {
2078 neigh_event_send(neigh, NULL);
2079 }
2080 }
2081
2082 resolve_neigh_exit6:
2083 rcu_read_unlock();
2084 if (neigh)
2085 neigh_release(neigh);
2086 dst_release(dst);
2087 return rc;
2088 }
2089
2090 /**
2091 * i40iw_ipv4_is_loopback - check if loopback
2092 * @loc_addr: local addr to compare
2093 * @rem_addr: remote address
2094 */
2095 static bool i40iw_ipv4_is_loopback(u32 loc_addr, u32 rem_addr)
2096 {
2097 return ipv4_is_loopback(htonl(rem_addr)) || (loc_addr == rem_addr);
2098 }
2099
2100 /**
2101 * i40iw_ipv6_is_loopback - check if loopback
2102 * @loc_addr: local addr to compare
2103 * @rem_addr: remote address
2104 */
2105 static bool i40iw_ipv6_is_loopback(u32 *loc_addr, u32 *rem_addr)
2106 {
2107 struct in6_addr raddr6;
2108
2109 i40iw_copy_ip_htonl(raddr6.in6_u.u6_addr32, rem_addr);
2110 return (!memcmp(loc_addr, rem_addr, 16) || ipv6_addr_loopback(&raddr6));
2111 }
2112
2113 /**
2114 * i40iw_make_cm_node - create a new instance of a cm node
2115 * @cm_core: cm's core
2116 * @iwdev: iwarp device structure
2117 * @cm_info: quad info for connection
2118 * @listener: passive connection's listener
2119 */
2120 static struct i40iw_cm_node *i40iw_make_cm_node(
2121 struct i40iw_cm_core *cm_core,
2122 struct i40iw_device *iwdev,
2123 struct i40iw_cm_info *cm_info,
2124 struct i40iw_cm_listener *listener)
2125 {
2126 struct i40iw_cm_node *cm_node;
2127 struct timespec ts;
2128 int oldarpindex;
2129 int arpindex;
2130 struct net_device *netdev = iwdev->netdev;
2131
2132 /* create an hte and cm_node for this instance */
2133 cm_node = kzalloc(sizeof(*cm_node), GFP_ATOMIC);
2134 if (!cm_node)
2135 return NULL;
2136
2137 /* set our node specific transport info */
2138 cm_node->ipv4 = cm_info->ipv4;
2139 cm_node->vlan_id = cm_info->vlan_id;
2140 memcpy(cm_node->loc_addr, cm_info->loc_addr, sizeof(cm_node->loc_addr));
2141 memcpy(cm_node->rem_addr, cm_info->rem_addr, sizeof(cm_node->rem_addr));
2142 cm_node->loc_port = cm_info->loc_port;
2143 cm_node->rem_port = cm_info->rem_port;
2144
2145 cm_node->mpa_frame_rev = iwdev->mpa_version;
2146 cm_node->send_rdma0_op = SEND_RDMA_READ_ZERO;
2147 cm_node->ird_size = I40IW_MAX_IRD_SIZE;
2148 cm_node->ord_size = I40IW_MAX_ORD_SIZE;
2149
2150 cm_node->listener = listener;
2151 cm_node->cm_id = cm_info->cm_id;
2152 ether_addr_copy(cm_node->loc_mac, netdev->dev_addr);
2153 spin_lock_init(&cm_node->retrans_list_lock);
2154
2155 atomic_set(&cm_node->ref_count, 1);
2156 /* associate our parent CM core */
2157 cm_node->cm_core = cm_core;
2158 cm_node->tcp_cntxt.loc_id = I40IW_CM_DEF_LOCAL_ID;
2159 cm_node->tcp_cntxt.rcv_wscale = I40IW_CM_DEFAULT_RCV_WND_SCALE;
2160 cm_node->tcp_cntxt.rcv_wnd =
2161 I40IW_CM_DEFAULT_RCV_WND_SCALED >> I40IW_CM_DEFAULT_RCV_WND_SCALE;
2162 ts = current_kernel_time();
2163 cm_node->tcp_cntxt.loc_seq_num = htonl(ts.tv_nsec);
2164 cm_node->tcp_cntxt.mss = iwdev->mss;
2165
2166 cm_node->iwdev = iwdev;
2167 cm_node->dev = &iwdev->sc_dev;
2168
2169 if ((cm_node->ipv4 &&
2170 i40iw_ipv4_is_loopback(cm_node->loc_addr[0], cm_node->rem_addr[0])) ||
2171 (!cm_node->ipv4 && i40iw_ipv6_is_loopback(cm_node->loc_addr,
2172 cm_node->rem_addr))) {
2173 arpindex = i40iw_arp_table(iwdev,
2174 cm_node->rem_addr,
2175 false,
2176 NULL,
2177 I40IW_ARP_RESOLVE);
2178 } else {
2179 oldarpindex = i40iw_arp_table(iwdev,
2180 cm_node->rem_addr,
2181 false,
2182 NULL,
2183 I40IW_ARP_RESOLVE);
2184 if (cm_node->ipv4)
2185 arpindex = i40iw_addr_resolve_neigh(iwdev,
2186 cm_info->loc_addr[0],
2187 cm_info->rem_addr[0],
2188 oldarpindex);
2189 else if (IS_ENABLED(CONFIG_IPV6))
2190 arpindex = i40iw_addr_resolve_neigh_ipv6(iwdev,
2191 cm_info->loc_addr,
2192 cm_info->rem_addr,
2193 oldarpindex);
2194 else
2195 arpindex = -EINVAL;
2196 }
2197 if (arpindex < 0) {
2198 i40iw_pr_err("cm_node arpindex\n");
2199 kfree(cm_node);
2200 return NULL;
2201 }
2202 ether_addr_copy(cm_node->rem_mac, iwdev->arp_table[arpindex].mac_addr);
2203 i40iw_add_hte_node(cm_core, cm_node);
2204 cm_core->stats_nodes_created++;
2205 return cm_node;
2206 }
2207
2208 /**
2209 * i40iw_rem_ref_cm_node - destroy an instance of a cm node
2210 * @cm_node: connection's node
2211 */
2212 static void i40iw_rem_ref_cm_node(struct i40iw_cm_node *cm_node)
2213 {
2214 struct i40iw_cm_core *cm_core = cm_node->cm_core;
2215 struct i40iw_qp *iwqp;
2216 struct i40iw_cm_info nfo;
2217 unsigned long flags;
2218
2219 spin_lock_irqsave(&cm_node->cm_core->ht_lock, flags);
2220 if (atomic_dec_return(&cm_node->ref_count)) {
2221 spin_unlock_irqrestore(&cm_node->cm_core->ht_lock, flags);
2222 return;
2223 }
2224 list_del(&cm_node->list);
2225 spin_unlock_irqrestore(&cm_node->cm_core->ht_lock, flags);
2226
2227 /* if the node is destroyed before connection was accelerated */
2228 if (!cm_node->accelerated && cm_node->accept_pend) {
2229 pr_err("node destroyed before established\n");
2230 atomic_dec(&cm_node->listener->pend_accepts_cnt);
2231 }
2232 if (cm_node->close_entry)
2233 i40iw_handle_close_entry(cm_node, 0);
2234 if (cm_node->listener) {
2235 i40iw_dec_refcnt_listen(cm_core, cm_node->listener, 0, true);
2236 } else {
2237 if (!i40iw_listen_port_in_use(cm_core, htons(cm_node->loc_port)) &&
2238 cm_node->apbvt_set && cm_node->iwdev) {
2239 i40iw_manage_apbvt(cm_node->iwdev,
2240 cm_node->loc_port,
2241 I40IW_MANAGE_APBVT_DEL);
2242 i40iw_get_addr_info(cm_node, &nfo);
2243 if (cm_node->qhash_set) {
2244 i40iw_manage_qhash(cm_node->iwdev,
2245 &nfo,
2246 I40IW_QHASH_TYPE_TCP_ESTABLISHED,
2247 I40IW_QHASH_MANAGE_TYPE_DELETE,
2248 NULL,
2249 false);
2250 cm_node->qhash_set = 0;
2251 }
2252 }
2253 }
2254
2255 iwqp = cm_node->iwqp;
2256 if (iwqp) {
2257 iwqp->cm_node = NULL;
2258 i40iw_rem_ref(&iwqp->ibqp);
2259 cm_node->iwqp = NULL;
2260 } else if (cm_node->qhash_set) {
2261 i40iw_get_addr_info(cm_node, &nfo);
2262 i40iw_manage_qhash(cm_node->iwdev,
2263 &nfo,
2264 I40IW_QHASH_TYPE_TCP_ESTABLISHED,
2265 I40IW_QHASH_MANAGE_TYPE_DELETE,
2266 NULL,
2267 false);
2268 cm_node->qhash_set = 0;
2269 }
2270
2271 cm_node->cm_core->stats_nodes_destroyed++;
2272 kfree(cm_node);
2273 }
2274
2275 /**
2276 * i40iw_handle_fin_pkt - FIN packet received
2277 * @cm_node: connection's node
2278 */
2279 static void i40iw_handle_fin_pkt(struct i40iw_cm_node *cm_node)
2280 {
2281 u32 ret;
2282
2283 switch (cm_node->state) {
2284 case I40IW_CM_STATE_SYN_RCVD:
2285 case I40IW_CM_STATE_SYN_SENT:
2286 case I40IW_CM_STATE_ESTABLISHED:
2287 case I40IW_CM_STATE_MPAREJ_RCVD:
2288 cm_node->tcp_cntxt.rcv_nxt++;
2289 i40iw_cleanup_retrans_entry(cm_node);
2290 cm_node->state = I40IW_CM_STATE_LAST_ACK;
2291 i40iw_send_fin(cm_node);
2292 break;
2293 case I40IW_CM_STATE_MPAREQ_SENT:
2294 i40iw_create_event(cm_node, I40IW_CM_EVENT_ABORTED);
2295 cm_node->tcp_cntxt.rcv_nxt++;
2296 i40iw_cleanup_retrans_entry(cm_node);
2297 cm_node->state = I40IW_CM_STATE_CLOSED;
2298 atomic_inc(&cm_node->ref_count);
2299 i40iw_send_reset(cm_node);
2300 break;
2301 case I40IW_CM_STATE_FIN_WAIT1:
2302 cm_node->tcp_cntxt.rcv_nxt++;
2303 i40iw_cleanup_retrans_entry(cm_node);
2304 cm_node->state = I40IW_CM_STATE_CLOSING;
2305 i40iw_send_ack(cm_node);
2306 /*
2307 * Wait for ACK as this is simultaneous close.
2308 * After we receive ACK, do not send anything.
2309 * Just rm the node.
2310 */
2311 break;
2312 case I40IW_CM_STATE_FIN_WAIT2:
2313 cm_node->tcp_cntxt.rcv_nxt++;
2314 i40iw_cleanup_retrans_entry(cm_node);
2315 cm_node->state = I40IW_CM_STATE_TIME_WAIT;
2316 i40iw_send_ack(cm_node);
2317 ret =
2318 i40iw_schedule_cm_timer(cm_node, NULL, I40IW_TIMER_TYPE_CLOSE, 1, 0);
2319 if (ret)
2320 i40iw_pr_err("node %p state = %d\n", cm_node, cm_node->state);
2321 break;
2322 case I40IW_CM_STATE_TIME_WAIT:
2323 cm_node->tcp_cntxt.rcv_nxt++;
2324 i40iw_cleanup_retrans_entry(cm_node);
2325 cm_node->state = I40IW_CM_STATE_CLOSED;
2326 i40iw_rem_ref_cm_node(cm_node);
2327 break;
2328 case I40IW_CM_STATE_OFFLOADED:
2329 default:
2330 i40iw_pr_err("bad state node %p state = %d\n", cm_node, cm_node->state);
2331 break;
2332 }
2333 }
2334
2335 /**
2336 * i40iw_handle_rst_pkt - process received RST packet
2337 * @cm_node: connection's node
2338 * @rbuf: receive buffer
2339 */
2340 static void i40iw_handle_rst_pkt(struct i40iw_cm_node *cm_node,
2341 struct i40iw_puda_buf *rbuf)
2342 {
2343 i40iw_cleanup_retrans_entry(cm_node);
2344 switch (cm_node->state) {
2345 case I40IW_CM_STATE_SYN_SENT:
2346 case I40IW_CM_STATE_MPAREQ_SENT:
2347 switch (cm_node->mpa_frame_rev) {
2348 case IETF_MPA_V2:
2349 cm_node->mpa_frame_rev = IETF_MPA_V1;
2350 /* send a syn and goto syn sent state */
2351 cm_node->state = I40IW_CM_STATE_SYN_SENT;
2352 if (i40iw_send_syn(cm_node, 0))
2353 i40iw_active_open_err(cm_node, false);
2354 break;
2355 case IETF_MPA_V1:
2356 default:
2357 i40iw_active_open_err(cm_node, false);
2358 break;
2359 }
2360 break;
2361 case I40IW_CM_STATE_MPAREQ_RCVD:
2362 atomic_add_return(1, &cm_node->passive_state);
2363 break;
2364 case I40IW_CM_STATE_ESTABLISHED:
2365 case I40IW_CM_STATE_SYN_RCVD:
2366 case I40IW_CM_STATE_LISTENING:
2367 i40iw_pr_err("Bad state state = %d\n", cm_node->state);
2368 i40iw_passive_open_err(cm_node, false);
2369 break;
2370 case I40IW_CM_STATE_OFFLOADED:
2371 i40iw_active_open_err(cm_node, false);
2372 break;
2373 case I40IW_CM_STATE_CLOSED:
2374 break;
2375 case I40IW_CM_STATE_FIN_WAIT2:
2376 case I40IW_CM_STATE_FIN_WAIT1:
2377 case I40IW_CM_STATE_LAST_ACK:
2378 cm_node->cm_id->rem_ref(cm_node->cm_id);
2379 case I40IW_CM_STATE_TIME_WAIT:
2380 cm_node->state = I40IW_CM_STATE_CLOSED;
2381 i40iw_rem_ref_cm_node(cm_node);
2382 break;
2383 default:
2384 break;
2385 }
2386 }
2387
2388 /**
2389 * i40iw_handle_rcv_mpa - Process a recv'd mpa buffer
2390 * @cm_node: connection's node
2391 * @rbuf: receive buffer
2392 */
2393 static void i40iw_handle_rcv_mpa(struct i40iw_cm_node *cm_node,
2394 struct i40iw_puda_buf *rbuf)
2395 {
2396 int ret;
2397 int datasize = rbuf->datalen;
2398 u8 *dataloc = rbuf->data;
2399
2400 enum i40iw_cm_event_type type = I40IW_CM_EVENT_UNKNOWN;
2401 u32 res_type;
2402
2403 ret = i40iw_parse_mpa(cm_node, dataloc, &res_type, datasize);
2404 if (ret) {
2405 if (cm_node->state == I40IW_CM_STATE_MPAREQ_SENT)
2406 i40iw_active_open_err(cm_node, true);
2407 else
2408 i40iw_passive_open_err(cm_node, true);
2409 return;
2410 }
2411
2412 switch (cm_node->state) {
2413 case I40IW_CM_STATE_ESTABLISHED:
2414 if (res_type == I40IW_MPA_REQUEST_REJECT)
2415 i40iw_pr_err("state for reject\n");
2416 cm_node->state = I40IW_CM_STATE_MPAREQ_RCVD;
2417 type = I40IW_CM_EVENT_MPA_REQ;
2418 i40iw_send_ack(cm_node); /* ACK received MPA request */
2419 atomic_set(&cm_node->passive_state,
2420 I40IW_PASSIVE_STATE_INDICATED);
2421 break;
2422 case I40IW_CM_STATE_MPAREQ_SENT:
2423 i40iw_cleanup_retrans_entry(cm_node);
2424 if (res_type == I40IW_MPA_REQUEST_REJECT) {
2425 type = I40IW_CM_EVENT_MPA_REJECT;
2426 cm_node->state = I40IW_CM_STATE_MPAREJ_RCVD;
2427 } else {
2428 type = I40IW_CM_EVENT_CONNECTED;
2429 cm_node->state = I40IW_CM_STATE_OFFLOADED;
2430 i40iw_send_ack(cm_node);
2431 }
2432 break;
2433 default:
2434 pr_err("%s wrong cm_node state =%d\n", __func__, cm_node->state);
2435 break;
2436 }
2437 i40iw_create_event(cm_node, type);
2438 }
2439
2440 /**
2441 * i40iw_indicate_pkt_err - Send up err event to cm
2442 * @cm_node: connection's node
2443 */
2444 static void i40iw_indicate_pkt_err(struct i40iw_cm_node *cm_node)
2445 {
2446 switch (cm_node->state) {
2447 case I40IW_CM_STATE_SYN_SENT:
2448 case I40IW_CM_STATE_MPAREQ_SENT:
2449 i40iw_active_open_err(cm_node, true);
2450 break;
2451 case I40IW_CM_STATE_ESTABLISHED:
2452 case I40IW_CM_STATE_SYN_RCVD:
2453 i40iw_passive_open_err(cm_node, true);
2454 break;
2455 case I40IW_CM_STATE_OFFLOADED:
2456 default:
2457 break;
2458 }
2459 }
2460
2461 /**
2462 * i40iw_check_syn - Check for error on received syn ack
2463 * @cm_node: connection's node
2464 * @tcph: pointer tcp header
2465 */
2466 static int i40iw_check_syn(struct i40iw_cm_node *cm_node, struct tcphdr *tcph)
2467 {
2468 int err = 0;
2469
2470 if (ntohl(tcph->ack_seq) != cm_node->tcp_cntxt.loc_seq_num) {
2471 err = 1;
2472 i40iw_active_open_err(cm_node, true);
2473 }
2474 return err;
2475 }
2476
2477 /**
2478 * i40iw_check_seq - check seq numbers if OK
2479 * @cm_node: connection's node
2480 * @tcph: pointer tcp header
2481 */
2482 static int i40iw_check_seq(struct i40iw_cm_node *cm_node, struct tcphdr *tcph)
2483 {
2484 int err = 0;
2485 u32 seq;
2486 u32 ack_seq;
2487 u32 loc_seq_num = cm_node->tcp_cntxt.loc_seq_num;
2488 u32 rcv_nxt = cm_node->tcp_cntxt.rcv_nxt;
2489 u32 rcv_wnd;
2490
2491 seq = ntohl(tcph->seq);
2492 ack_seq = ntohl(tcph->ack_seq);
2493 rcv_wnd = cm_node->tcp_cntxt.rcv_wnd;
2494 if (ack_seq != loc_seq_num)
2495 err = -1;
2496 else if (!between(seq, rcv_nxt, (rcv_nxt + rcv_wnd)))
2497 err = -1;
2498 if (err) {
2499 i40iw_pr_err("seq number\n");
2500 i40iw_indicate_pkt_err(cm_node);
2501 }
2502 return err;
2503 }
2504
2505 /**
2506 * i40iw_handle_syn_pkt - is for Passive node
2507 * @cm_node: connection's node
2508 * @rbuf: receive buffer
2509 */
2510 static void i40iw_handle_syn_pkt(struct i40iw_cm_node *cm_node,
2511 struct i40iw_puda_buf *rbuf)
2512 {
2513 struct tcphdr *tcph = (struct tcphdr *)rbuf->tcph;
2514 int ret;
2515 u32 inc_sequence;
2516 int optionsize;
2517 struct i40iw_cm_info nfo;
2518
2519 optionsize = (tcph->doff << 2) - sizeof(struct tcphdr);
2520 inc_sequence = ntohl(tcph->seq);
2521
2522 switch (cm_node->state) {
2523 case I40IW_CM_STATE_SYN_SENT:
2524 case I40IW_CM_STATE_MPAREQ_SENT:
2525 /* Rcvd syn on active open connection */
2526 i40iw_active_open_err(cm_node, 1);
2527 break;
2528 case I40IW_CM_STATE_LISTENING:
2529 /* Passive OPEN */
2530 if (atomic_read(&cm_node->listener->pend_accepts_cnt) >
2531 cm_node->listener->backlog) {
2532 cm_node->cm_core->stats_backlog_drops++;
2533 i40iw_passive_open_err(cm_node, false);
2534 break;
2535 }
2536 ret = i40iw_handle_tcp_options(cm_node, tcph, optionsize, 1);
2537 if (ret) {
2538 i40iw_passive_open_err(cm_node, false);
2539 /* drop pkt */
2540 break;
2541 }
2542 cm_node->tcp_cntxt.rcv_nxt = inc_sequence + 1;
2543 cm_node->accept_pend = 1;
2544 atomic_inc(&cm_node->listener->pend_accepts_cnt);
2545
2546 cm_node->state = I40IW_CM_STATE_SYN_RCVD;
2547 i40iw_get_addr_info(cm_node, &nfo);
2548 ret = i40iw_manage_qhash(cm_node->iwdev,
2549 &nfo,
2550 I40IW_QHASH_TYPE_TCP_ESTABLISHED,
2551 I40IW_QHASH_MANAGE_TYPE_ADD,
2552 (void *)cm_node,
2553 false);
2554 cm_node->qhash_set = true;
2555 break;
2556 case I40IW_CM_STATE_CLOSED:
2557 i40iw_cleanup_retrans_entry(cm_node);
2558 atomic_inc(&cm_node->ref_count);
2559 i40iw_send_reset(cm_node);
2560 break;
2561 case I40IW_CM_STATE_OFFLOADED:
2562 case I40IW_CM_STATE_ESTABLISHED:
2563 case I40IW_CM_STATE_FIN_WAIT1:
2564 case I40IW_CM_STATE_FIN_WAIT2:
2565 case I40IW_CM_STATE_MPAREQ_RCVD:
2566 case I40IW_CM_STATE_LAST_ACK:
2567 case I40IW_CM_STATE_CLOSING:
2568 case I40IW_CM_STATE_UNKNOWN:
2569 default:
2570 break;
2571 }
2572 }
2573
2574 /**
2575 * i40iw_handle_synack_pkt - Process SYN+ACK packet (active side)
2576 * @cm_node: connection's node
2577 * @rbuf: receive buffer
2578 */
2579 static void i40iw_handle_synack_pkt(struct i40iw_cm_node *cm_node,
2580 struct i40iw_puda_buf *rbuf)
2581 {
2582 struct tcphdr *tcph = (struct tcphdr *)rbuf->tcph;
2583 int ret;
2584 u32 inc_sequence;
2585 int optionsize;
2586
2587 optionsize = (tcph->doff << 2) - sizeof(struct tcphdr);
2588 inc_sequence = ntohl(tcph->seq);
2589 switch (cm_node->state) {
2590 case I40IW_CM_STATE_SYN_SENT:
2591 i40iw_cleanup_retrans_entry(cm_node);
2592 /* active open */
2593 if (i40iw_check_syn(cm_node, tcph)) {
2594 i40iw_pr_err("check syn fail\n");
2595 return;
2596 }
2597 cm_node->tcp_cntxt.rem_ack_num = ntohl(tcph->ack_seq);
2598 /* setup options */
2599 ret = i40iw_handle_tcp_options(cm_node, tcph, optionsize, 0);
2600 if (ret) {
2601 i40iw_debug(cm_node->dev,
2602 I40IW_DEBUG_CM,
2603 "cm_node=%p tcp_options failed\n",
2604 cm_node);
2605 break;
2606 }
2607 i40iw_cleanup_retrans_entry(cm_node);
2608 cm_node->tcp_cntxt.rcv_nxt = inc_sequence + 1;
2609 i40iw_send_ack(cm_node); /* ACK for the syn_ack */
2610 ret = i40iw_send_mpa_request(cm_node);
2611 if (ret) {
2612 i40iw_debug(cm_node->dev,
2613 I40IW_DEBUG_CM,
2614 "cm_node=%p i40iw_send_mpa_request failed\n",
2615 cm_node);
2616 break;
2617 }
2618 cm_node->state = I40IW_CM_STATE_MPAREQ_SENT;
2619 break;
2620 case I40IW_CM_STATE_MPAREQ_RCVD:
2621 i40iw_passive_open_err(cm_node, true);
2622 break;
2623 case I40IW_CM_STATE_LISTENING:
2624 cm_node->tcp_cntxt.loc_seq_num = ntohl(tcph->ack_seq);
2625 i40iw_cleanup_retrans_entry(cm_node);
2626 cm_node->state = I40IW_CM_STATE_CLOSED;
2627 i40iw_send_reset(cm_node);
2628 break;
2629 case I40IW_CM_STATE_CLOSED:
2630 cm_node->tcp_cntxt.loc_seq_num = ntohl(tcph->ack_seq);
2631 i40iw_cleanup_retrans_entry(cm_node);
2632 atomic_inc(&cm_node->ref_count);
2633 i40iw_send_reset(cm_node);
2634 break;
2635 case I40IW_CM_STATE_ESTABLISHED:
2636 case I40IW_CM_STATE_FIN_WAIT1:
2637 case I40IW_CM_STATE_FIN_WAIT2:
2638 case I40IW_CM_STATE_LAST_ACK:
2639 case I40IW_CM_STATE_OFFLOADED:
2640 case I40IW_CM_STATE_CLOSING:
2641 case I40IW_CM_STATE_UNKNOWN:
2642 case I40IW_CM_STATE_MPAREQ_SENT:
2643 default:
2644 break;
2645 }
2646 }
2647
2648 /**
2649 * i40iw_handle_ack_pkt - process packet with ACK
2650 * @cm_node: connection's node
2651 * @rbuf: receive buffer
2652 */
2653 static int i40iw_handle_ack_pkt(struct i40iw_cm_node *cm_node,
2654 struct i40iw_puda_buf *rbuf)
2655 {
2656 struct tcphdr *tcph = (struct tcphdr *)rbuf->tcph;
2657 u32 inc_sequence;
2658 int ret = 0;
2659 int optionsize;
2660 u32 datasize = rbuf->datalen;
2661
2662 optionsize = (tcph->doff << 2) - sizeof(struct tcphdr);
2663
2664 if (i40iw_check_seq(cm_node, tcph))
2665 return -EINVAL;
2666
2667 inc_sequence = ntohl(tcph->seq);
2668 switch (cm_node->state) {
2669 case I40IW_CM_STATE_SYN_RCVD:
2670 i40iw_cleanup_retrans_entry(cm_node);
2671 ret = i40iw_handle_tcp_options(cm_node, tcph, optionsize, 1);
2672 if (ret)
2673 break;
2674 cm_node->tcp_cntxt.rem_ack_num = ntohl(tcph->ack_seq);
2675 cm_node->state = I40IW_CM_STATE_ESTABLISHED;
2676 if (datasize) {
2677 cm_node->tcp_cntxt.rcv_nxt = inc_sequence + datasize;
2678 i40iw_handle_rcv_mpa(cm_node, rbuf);
2679 }
2680 break;
2681 case I40IW_CM_STATE_ESTABLISHED:
2682 i40iw_cleanup_retrans_entry(cm_node);
2683 if (datasize) {
2684 cm_node->tcp_cntxt.rcv_nxt = inc_sequence + datasize;
2685 i40iw_handle_rcv_mpa(cm_node, rbuf);
2686 }
2687 break;
2688 case I40IW_CM_STATE_MPAREQ_SENT:
2689 cm_node->tcp_cntxt.rem_ack_num = ntohl(tcph->ack_seq);
2690 if (datasize) {
2691 cm_node->tcp_cntxt.rcv_nxt = inc_sequence + datasize;
2692 i40iw_handle_rcv_mpa(cm_node, rbuf);
2693 }
2694 break;
2695 case I40IW_CM_STATE_LISTENING:
2696 i40iw_cleanup_retrans_entry(cm_node);
2697 cm_node->state = I40IW_CM_STATE_CLOSED;
2698 i40iw_send_reset(cm_node);
2699 break;
2700 case I40IW_CM_STATE_CLOSED:
2701 i40iw_cleanup_retrans_entry(cm_node);
2702 atomic_inc(&cm_node->ref_count);
2703 i40iw_send_reset(cm_node);
2704 break;
2705 case I40IW_CM_STATE_LAST_ACK:
2706 case I40IW_CM_STATE_CLOSING:
2707 i40iw_cleanup_retrans_entry(cm_node);
2708 cm_node->state = I40IW_CM_STATE_CLOSED;
2709 if (!cm_node->accept_pend)
2710 cm_node->cm_id->rem_ref(cm_node->cm_id);
2711 i40iw_rem_ref_cm_node(cm_node);
2712 break;
2713 case I40IW_CM_STATE_FIN_WAIT1:
2714 i40iw_cleanup_retrans_entry(cm_node);
2715 cm_node->state = I40IW_CM_STATE_FIN_WAIT2;
2716 break;
2717 case I40IW_CM_STATE_SYN_SENT:
2718 case I40IW_CM_STATE_FIN_WAIT2:
2719 case I40IW_CM_STATE_OFFLOADED:
2720 case I40IW_CM_STATE_MPAREQ_RCVD:
2721 case I40IW_CM_STATE_UNKNOWN:
2722 default:
2723 i40iw_cleanup_retrans_entry(cm_node);
2724 break;
2725 }
2726 return ret;
2727 }
2728
2729 /**
2730 * i40iw_process_packet - process cm packet
2731 * @cm_node: connection's node
2732 * @rbuf: receive buffer
2733 */
2734 static void i40iw_process_packet(struct i40iw_cm_node *cm_node,
2735 struct i40iw_puda_buf *rbuf)
2736 {
2737 enum i40iw_tcpip_pkt_type pkt_type = I40IW_PKT_TYPE_UNKNOWN;
2738 struct tcphdr *tcph = (struct tcphdr *)rbuf->tcph;
2739 u32 fin_set = 0;
2740 int ret;
2741
2742 if (tcph->rst) {
2743 pkt_type = I40IW_PKT_TYPE_RST;
2744 } else if (tcph->syn) {
2745 pkt_type = I40IW_PKT_TYPE_SYN;
2746 if (tcph->ack)
2747 pkt_type = I40IW_PKT_TYPE_SYNACK;
2748 } else if (tcph->ack) {
2749 pkt_type = I40IW_PKT_TYPE_ACK;
2750 }
2751 if (tcph->fin)
2752 fin_set = 1;
2753
2754 switch (pkt_type) {
2755 case I40IW_PKT_TYPE_SYN:
2756 i40iw_handle_syn_pkt(cm_node, rbuf);
2757 break;
2758 case I40IW_PKT_TYPE_SYNACK:
2759 i40iw_handle_synack_pkt(cm_node, rbuf);
2760 break;
2761 case I40IW_PKT_TYPE_ACK:
2762 ret = i40iw_handle_ack_pkt(cm_node, rbuf);
2763 if (fin_set && !ret)
2764 i40iw_handle_fin_pkt(cm_node);
2765 break;
2766 case I40IW_PKT_TYPE_RST:
2767 i40iw_handle_rst_pkt(cm_node, rbuf);
2768 break;
2769 default:
2770 if (fin_set &&
2771 (!i40iw_check_seq(cm_node, (struct tcphdr *)rbuf->tcph)))
2772 i40iw_handle_fin_pkt(cm_node);
2773 break;
2774 }
2775 }
2776
2777 /**
2778 * i40iw_make_listen_node - create a listen node with params
2779 * @cm_core: cm's core
2780 * @iwdev: iwarp device structure
2781 * @cm_info: quad info for connection
2782 */
2783 static struct i40iw_cm_listener *i40iw_make_listen_node(
2784 struct i40iw_cm_core *cm_core,
2785 struct i40iw_device *iwdev,
2786 struct i40iw_cm_info *cm_info)
2787 {
2788 struct i40iw_cm_listener *listener;
2789 unsigned long flags;
2790
2791 /* cannot have multiple matching listeners */
2792 listener = i40iw_find_listener(cm_core, cm_info->loc_addr,
2793 cm_info->loc_port,
2794 cm_info->vlan_id,
2795 I40IW_CM_LISTENER_EITHER_STATE);
2796 if (listener &&
2797 (listener->listener_state == I40IW_CM_LISTENER_ACTIVE_STATE)) {
2798 atomic_dec(&listener->ref_count);
2799 i40iw_debug(cm_core->dev,
2800 I40IW_DEBUG_CM,
2801 "Not creating listener since it already exists\n");
2802 return NULL;
2803 }
2804
2805 if (!listener) {
2806 /* create a CM listen node (1/2 node to compare incoming traffic to) */
2807 listener = kzalloc(sizeof(*listener), GFP_ATOMIC);
2808 if (!listener)
2809 return NULL;
2810 cm_core->stats_listen_nodes_created++;
2811 memcpy(listener->loc_addr, cm_info->loc_addr, sizeof(listener->loc_addr));
2812 listener->loc_port = cm_info->loc_port;
2813
2814 INIT_LIST_HEAD(&listener->child_listen_list);
2815
2816 atomic_set(&listener->ref_count, 1);
2817 } else {
2818 listener->reused_node = 1;
2819 }
2820
2821 listener->cm_id = cm_info->cm_id;
2822 listener->ipv4 = cm_info->ipv4;
2823 listener->vlan_id = cm_info->vlan_id;
2824 atomic_set(&listener->pend_accepts_cnt, 0);
2825 listener->cm_core = cm_core;
2826 listener->iwdev = iwdev;
2827
2828 listener->backlog = cm_info->backlog;
2829 listener->listener_state = I40IW_CM_LISTENER_ACTIVE_STATE;
2830
2831 if (!listener->reused_node) {
2832 spin_lock_irqsave(&cm_core->listen_list_lock, flags);
2833 list_add(&listener->list, &cm_core->listen_nodes);
2834 spin_unlock_irqrestore(&cm_core->listen_list_lock, flags);
2835 }
2836
2837 return listener;
2838 }
2839
2840 /**
2841 * i40iw_create_cm_node - make a connection node with params
2842 * @cm_core: cm's core
2843 * @iwdev: iwarp device structure
2844 * @private_data_len: len to provate data for mpa request
2845 * @private_data: pointer to private data for connection
2846 * @cm_info: quad info for connection
2847 */
2848 static struct i40iw_cm_node *i40iw_create_cm_node(
2849 struct i40iw_cm_core *cm_core,
2850 struct i40iw_device *iwdev,
2851 u16 private_data_len,
2852 void *private_data,
2853 struct i40iw_cm_info *cm_info)
2854 {
2855 int ret;
2856 struct i40iw_cm_node *cm_node;
2857 struct i40iw_cm_listener *loopback_remotelistener;
2858 struct i40iw_cm_node *loopback_remotenode;
2859 struct i40iw_cm_info loopback_cm_info;
2860
2861 /* create a CM connection node */
2862 cm_node = i40iw_make_cm_node(cm_core, iwdev, cm_info, NULL);
2863 if (!cm_node)
2864 return NULL;
2865 /* set our node side to client (active) side */
2866 cm_node->tcp_cntxt.client = 1;
2867 cm_node->tcp_cntxt.rcv_wscale = I40IW_CM_DEFAULT_RCV_WND_SCALE;
2868
2869 if (!memcmp(cm_info->loc_addr, cm_info->rem_addr, sizeof(cm_info->loc_addr))) {
2870 loopback_remotelistener = i40iw_find_listener(
2871 cm_core,
2872 cm_info->rem_addr,
2873 cm_node->rem_port,
2874 cm_node->vlan_id,
2875 I40IW_CM_LISTENER_ACTIVE_STATE);
2876 if (!loopback_remotelistener) {
2877 i40iw_create_event(cm_node, I40IW_CM_EVENT_ABORTED);
2878 } else {
2879 loopback_cm_info = *cm_info;
2880 loopback_cm_info.loc_port = cm_info->rem_port;
2881 loopback_cm_info.rem_port = cm_info->loc_port;
2882 loopback_cm_info.cm_id = loopback_remotelistener->cm_id;
2883 loopback_cm_info.ipv4 = cm_info->ipv4;
2884 loopback_remotenode = i40iw_make_cm_node(cm_core,
2885 iwdev,
2886 &loopback_cm_info,
2887 loopback_remotelistener);
2888 if (!loopback_remotenode) {
2889 i40iw_rem_ref_cm_node(cm_node);
2890 return NULL;
2891 }
2892 cm_core->stats_loopbacks++;
2893 loopback_remotenode->loopbackpartner = cm_node;
2894 loopback_remotenode->tcp_cntxt.rcv_wscale =
2895 I40IW_CM_DEFAULT_RCV_WND_SCALE;
2896 cm_node->loopbackpartner = loopback_remotenode;
2897 memcpy(loopback_remotenode->pdata_buf, private_data,
2898 private_data_len);
2899 loopback_remotenode->pdata.size = private_data_len;
2900
2901 cm_node->state = I40IW_CM_STATE_OFFLOADED;
2902 cm_node->tcp_cntxt.rcv_nxt =
2903 loopback_remotenode->tcp_cntxt.loc_seq_num;
2904 loopback_remotenode->tcp_cntxt.rcv_nxt =
2905 cm_node->tcp_cntxt.loc_seq_num;
2906 cm_node->tcp_cntxt.max_snd_wnd =
2907 loopback_remotenode->tcp_cntxt.rcv_wnd;
2908 loopback_remotenode->tcp_cntxt.max_snd_wnd = cm_node->tcp_cntxt.rcv_wnd;
2909 cm_node->tcp_cntxt.snd_wnd = loopback_remotenode->tcp_cntxt.rcv_wnd;
2910 loopback_remotenode->tcp_cntxt.snd_wnd = cm_node->tcp_cntxt.rcv_wnd;
2911 cm_node->tcp_cntxt.snd_wscale = loopback_remotenode->tcp_cntxt.rcv_wscale;
2912 loopback_remotenode->tcp_cntxt.snd_wscale = cm_node->tcp_cntxt.rcv_wscale;
2913 loopback_remotenode->state = I40IW_CM_STATE_MPAREQ_RCVD;
2914 i40iw_create_event(loopback_remotenode, I40IW_CM_EVENT_MPA_REQ);
2915 }
2916 return cm_node;
2917 }
2918
2919 cm_node->pdata.size = private_data_len;
2920 cm_node->pdata.addr = cm_node->pdata_buf;
2921
2922 memcpy(cm_node->pdata_buf, private_data, private_data_len);
2923
2924 cm_node->state = I40IW_CM_STATE_SYN_SENT;
2925 ret = i40iw_send_syn(cm_node, 0);
2926
2927 if (ret) {
2928 if (cm_node->ipv4)
2929 i40iw_debug(cm_node->dev,
2930 I40IW_DEBUG_CM,
2931 "Api - connect() FAILED: dest addr=%pI4",
2932 cm_node->rem_addr);
2933 else
2934 i40iw_debug(cm_node->dev, I40IW_DEBUG_CM,
2935 "Api - connect() FAILED: dest addr=%pI6",
2936 cm_node->rem_addr);
2937 i40iw_rem_ref_cm_node(cm_node);
2938 cm_node = NULL;
2939 }
2940
2941 if (cm_node)
2942 i40iw_debug(cm_node->dev,
2943 I40IW_DEBUG_CM,
2944 "Api - connect(): port=0x%04x, cm_node=%p, cm_id = %p.\n",
2945 cm_node->rem_port,
2946 cm_node,
2947 cm_node->cm_id);
2948
2949 return cm_node;
2950 }
2951
2952 /**
2953 * i40iw_cm_reject - reject and teardown a connection
2954 * @cm_node: connection's node
2955 * @pdate: ptr to private data for reject
2956 * @plen: size of private data
2957 */
2958 static int i40iw_cm_reject(struct i40iw_cm_node *cm_node, const void *pdata, u8 plen)
2959 {
2960 int ret = 0;
2961 int err;
2962 int passive_state;
2963 struct iw_cm_id *cm_id = cm_node->cm_id;
2964 struct i40iw_cm_node *loopback = cm_node->loopbackpartner;
2965
2966 if (cm_node->tcp_cntxt.client)
2967 return ret;
2968 i40iw_cleanup_retrans_entry(cm_node);
2969
2970 if (!loopback) {
2971 passive_state = atomic_add_return(1, &cm_node->passive_state);
2972 if (passive_state == I40IW_SEND_RESET_EVENT) {
2973 cm_node->state = I40IW_CM_STATE_CLOSED;
2974 i40iw_rem_ref_cm_node(cm_node);
2975 } else {
2976 if (cm_node->state == I40IW_CM_STATE_LISTENER_DESTROYED) {
2977 i40iw_rem_ref_cm_node(cm_node);
2978 } else {
2979 ret = i40iw_send_mpa_reject(cm_node, pdata, plen);
2980 if (ret) {
2981 cm_node->state = I40IW_CM_STATE_CLOSED;
2982 err = i40iw_send_reset(cm_node);
2983 if (err)
2984 i40iw_pr_err("send reset failed\n");
2985 } else {
2986 cm_id->add_ref(cm_id);
2987 }
2988 }
2989 }
2990 } else {
2991 cm_node->cm_id = NULL;
2992 if (cm_node->state == I40IW_CM_STATE_LISTENER_DESTROYED) {
2993 i40iw_rem_ref_cm_node(cm_node);
2994 i40iw_rem_ref_cm_node(loopback);
2995 } else {
2996 ret = i40iw_send_cm_event(loopback,
2997 loopback->cm_id,
2998 IW_CM_EVENT_CONNECT_REPLY,
2999 -ECONNREFUSED);
3000 i40iw_rem_ref_cm_node(cm_node);
3001 loopback->state = I40IW_CM_STATE_CLOSING;
3002
3003 cm_id = loopback->cm_id;
3004 i40iw_rem_ref_cm_node(loopback);
3005 cm_id->rem_ref(cm_id);
3006 }
3007 }
3008
3009 return ret;
3010 }
3011
3012 /**
3013 * i40iw_cm_close - close of cm connection
3014 * @cm_node: connection's node
3015 */
3016 static int i40iw_cm_close(struct i40iw_cm_node *cm_node)
3017 {
3018 int ret = 0;
3019
3020 if (!cm_node)
3021 return -EINVAL;
3022
3023 switch (cm_node->state) {
3024 case I40IW_CM_STATE_SYN_RCVD:
3025 case I40IW_CM_STATE_SYN_SENT:
3026 case I40IW_CM_STATE_ONE_SIDE_ESTABLISHED:
3027 case I40IW_CM_STATE_ESTABLISHED:
3028 case I40IW_CM_STATE_ACCEPTING:
3029 case I40IW_CM_STATE_MPAREQ_SENT:
3030 case I40IW_CM_STATE_MPAREQ_RCVD:
3031 i40iw_cleanup_retrans_entry(cm_node);
3032 i40iw_send_reset(cm_node);
3033 break;
3034 case I40IW_CM_STATE_CLOSE_WAIT:
3035 cm_node->state = I40IW_CM_STATE_LAST_ACK;
3036 i40iw_send_fin(cm_node);
3037 break;
3038 case I40IW_CM_STATE_FIN_WAIT1:
3039 case I40IW_CM_STATE_FIN_WAIT2:
3040 case I40IW_CM_STATE_LAST_ACK:
3041 case I40IW_CM_STATE_TIME_WAIT:
3042 case I40IW_CM_STATE_CLOSING:
3043 ret = -1;
3044 break;
3045 case I40IW_CM_STATE_LISTENING:
3046 i40iw_cleanup_retrans_entry(cm_node);
3047 i40iw_send_reset(cm_node);
3048 break;
3049 case I40IW_CM_STATE_MPAREJ_RCVD:
3050 case I40IW_CM_STATE_UNKNOWN:
3051 case I40IW_CM_STATE_INITED:
3052 case I40IW_CM_STATE_CLOSED:
3053 case I40IW_CM_STATE_LISTENER_DESTROYED:
3054 i40iw_rem_ref_cm_node(cm_node);
3055 break;
3056 case I40IW_CM_STATE_OFFLOADED:
3057 if (cm_node->send_entry)
3058 i40iw_pr_err("send_entry\n");
3059 i40iw_rem_ref_cm_node(cm_node);
3060 break;
3061 }
3062 return ret;
3063 }
3064
3065 /**
3066 * i40iw_receive_ilq - recv an ETHERNET packet, and process it
3067 * through CM
3068 * @dev: FPK dev struct
3069 * @rbuf: receive buffer
3070 */
3071 void i40iw_receive_ilq(struct i40iw_sc_dev *dev, struct i40iw_puda_buf *rbuf)
3072 {
3073 struct i40iw_cm_node *cm_node;
3074 struct i40iw_cm_listener *listener;
3075 struct iphdr *iph;
3076 struct ipv6hdr *ip6h;
3077 struct tcphdr *tcph;
3078 struct i40iw_cm_info cm_info;
3079 struct i40iw_device *iwdev = (struct i40iw_device *)dev->back_dev;
3080 struct i40iw_cm_core *cm_core = &iwdev->cm_core;
3081 struct vlan_ethhdr *ethh;
3082
3083 /* if vlan, then maclen = 18 else 14 */
3084 iph = (struct iphdr *)rbuf->iph;
3085 memset(&cm_info, 0, sizeof(cm_info));
3086
3087 i40iw_debug_buf(dev,
3088 I40IW_DEBUG_ILQ,
3089 "RECEIVE ILQ BUFFER",
3090 rbuf->mem.va,
3091 rbuf->totallen);
3092 ethh = (struct vlan_ethhdr *)rbuf->mem.va;
3093
3094 if (ethh->h_vlan_proto == htons(ETH_P_8021Q)) {
3095 cm_info.vlan_id = ntohs(ethh->h_vlan_TCI) & VLAN_VID_MASK;
3096 i40iw_debug(cm_core->dev,
3097 I40IW_DEBUG_CM,
3098 "%s vlan_id=%d\n",
3099 __func__,
3100 cm_info.vlan_id);
3101 } else {
3102 cm_info.vlan_id = I40IW_NO_VLAN;
3103 }
3104 tcph = (struct tcphdr *)rbuf->tcph;
3105
3106 if (rbuf->ipv4) {
3107 cm_info.loc_addr[0] = ntohl(iph->daddr);
3108 cm_info.rem_addr[0] = ntohl(iph->saddr);
3109 cm_info.ipv4 = true;
3110 } else {
3111 ip6h = (struct ipv6hdr *)rbuf->iph;
3112 i40iw_copy_ip_ntohl(cm_info.loc_addr,
3113 ip6h->daddr.in6_u.u6_addr32);
3114 i40iw_copy_ip_ntohl(cm_info.rem_addr,
3115 ip6h->saddr.in6_u.u6_addr32);
3116 cm_info.ipv4 = false;
3117 }
3118 cm_info.loc_port = ntohs(tcph->dest);
3119 cm_info.rem_port = ntohs(tcph->source);
3120 cm_node = i40iw_find_node(cm_core,
3121 cm_info.rem_port,
3122 cm_info.rem_addr,
3123 cm_info.loc_port,
3124 cm_info.loc_addr,
3125 true);
3126
3127 if (!cm_node) {
3128 /* Only type of packet accepted are for */
3129 /* the PASSIVE open (syn only) */
3130 if (!tcph->syn || tcph->ack)
3131 return;
3132 listener =
3133 i40iw_find_listener(cm_core,
3134 cm_info.loc_addr,
3135 cm_info.loc_port,
3136 cm_info.vlan_id,
3137 I40IW_CM_LISTENER_ACTIVE_STATE);
3138 if (!listener) {
3139 cm_info.cm_id = NULL;
3140 i40iw_debug(cm_core->dev,
3141 I40IW_DEBUG_CM,
3142 "%s no listener found\n",
3143 __func__);
3144 return;
3145 }
3146 cm_info.cm_id = listener->cm_id;
3147 cm_node = i40iw_make_cm_node(cm_core, iwdev, &cm_info, listener);
3148 if (!cm_node) {
3149 i40iw_debug(cm_core->dev,
3150 I40IW_DEBUG_CM,
3151 "%s allocate node failed\n",
3152 __func__);
3153 atomic_dec(&listener->ref_count);
3154 return;
3155 }
3156 if (!tcph->rst && !tcph->fin) {
3157 cm_node->state = I40IW_CM_STATE_LISTENING;
3158 } else {
3159 i40iw_rem_ref_cm_node(cm_node);
3160 return;
3161 }
3162 atomic_inc(&cm_node->ref_count);
3163 } else if (cm_node->state == I40IW_CM_STATE_OFFLOADED) {
3164 i40iw_rem_ref_cm_node(cm_node);
3165 return;
3166 }
3167 i40iw_process_packet(cm_node, rbuf);
3168 i40iw_rem_ref_cm_node(cm_node);
3169 }
3170
3171 /**
3172 * i40iw_setup_cm_core - allocate a top level instance of a cm
3173 * core
3174 * @iwdev: iwarp device structure
3175 */
3176 void i40iw_setup_cm_core(struct i40iw_device *iwdev)
3177 {
3178 struct i40iw_cm_core *cm_core = &iwdev->cm_core;
3179
3180 cm_core->iwdev = iwdev;
3181 cm_core->dev = &iwdev->sc_dev;
3182
3183 INIT_LIST_HEAD(&cm_core->connected_nodes);
3184 INIT_LIST_HEAD(&cm_core->listen_nodes);
3185
3186 init_timer(&cm_core->tcp_timer);
3187 cm_core->tcp_timer.function = i40iw_cm_timer_tick;
3188 cm_core->tcp_timer.data = (unsigned long)cm_core;
3189
3190 spin_lock_init(&cm_core->ht_lock);
3191 spin_lock_init(&cm_core->listen_list_lock);
3192
3193 cm_core->event_wq = create_singlethread_workqueue("iwewq");
3194 cm_core->disconn_wq = create_singlethread_workqueue("iwdwq");
3195 }
3196
3197 /**
3198 * i40iw_cleanup_cm_core - deallocate a top level instance of a
3199 * cm core
3200 * @cm_core: cm's core
3201 */
3202 void i40iw_cleanup_cm_core(struct i40iw_cm_core *cm_core)
3203 {
3204 unsigned long flags;
3205
3206 if (!cm_core)
3207 return;
3208
3209 spin_lock_irqsave(&cm_core->ht_lock, flags);
3210 if (timer_pending(&cm_core->tcp_timer))
3211 del_timer_sync(&cm_core->tcp_timer);
3212 spin_unlock_irqrestore(&cm_core->ht_lock, flags);
3213
3214 destroy_workqueue(cm_core->event_wq);
3215 destroy_workqueue(cm_core->disconn_wq);
3216 }
3217
3218 /**
3219 * i40iw_init_tcp_ctx - setup qp context
3220 * @cm_node: connection's node
3221 * @tcp_info: offload info for tcp
3222 * @iwqp: associate qp for the connection
3223 */
3224 static void i40iw_init_tcp_ctx(struct i40iw_cm_node *cm_node,
3225 struct i40iw_tcp_offload_info *tcp_info,
3226 struct i40iw_qp *iwqp)
3227 {
3228 tcp_info->ipv4 = cm_node->ipv4;
3229 tcp_info->drop_ooo_seg = true;
3230 tcp_info->wscale = true;
3231 tcp_info->ignore_tcp_opt = true;
3232 tcp_info->ignore_tcp_uns_opt = true;
3233 tcp_info->no_nagle = false;
3234
3235 tcp_info->ttl = I40IW_DEFAULT_TTL;
3236 tcp_info->rtt_var = cpu_to_le32(I40IW_DEFAULT_RTT_VAR);
3237 tcp_info->ss_thresh = cpu_to_le32(I40IW_DEFAULT_SS_THRESH);
3238 tcp_info->rexmit_thresh = I40IW_DEFAULT_REXMIT_THRESH;
3239
3240 tcp_info->tcp_state = I40IW_TCP_STATE_ESTABLISHED;
3241 tcp_info->snd_wscale = cm_node->tcp_cntxt.snd_wscale;
3242 tcp_info->rcv_wscale = cm_node->tcp_cntxt.rcv_wscale;
3243
3244 tcp_info->snd_nxt = cpu_to_le32(cm_node->tcp_cntxt.loc_seq_num);
3245 tcp_info->snd_wnd = cpu_to_le32(cm_node->tcp_cntxt.snd_wnd);
3246 tcp_info->rcv_nxt = cpu_to_le32(cm_node->tcp_cntxt.rcv_nxt);
3247 tcp_info->snd_max = cpu_to_le32(cm_node->tcp_cntxt.loc_seq_num);
3248
3249 tcp_info->snd_una = cpu_to_le32(cm_node->tcp_cntxt.loc_seq_num);
3250 tcp_info->cwnd = cpu_to_le32(2 * cm_node->tcp_cntxt.mss);
3251 tcp_info->snd_wl1 = cpu_to_le32(cm_node->tcp_cntxt.rcv_nxt);
3252 tcp_info->snd_wl2 = cpu_to_le32(cm_node->tcp_cntxt.loc_seq_num);
3253 tcp_info->max_snd_window = cpu_to_le32(cm_node->tcp_cntxt.max_snd_wnd);
3254 tcp_info->rcv_wnd = cpu_to_le32(cm_node->tcp_cntxt.rcv_wnd <<
3255 cm_node->tcp_cntxt.rcv_wscale);
3256
3257 tcp_info->flow_label = 0;
3258 tcp_info->snd_mss = cpu_to_le32(((u32)cm_node->tcp_cntxt.mss));
3259 if (cm_node->vlan_id < VLAN_TAG_PRESENT) {
3260 tcp_info->insert_vlan_tag = true;
3261 tcp_info->vlan_tag = cpu_to_le16(cm_node->vlan_id);
3262 }
3263 if (cm_node->ipv4) {
3264 tcp_info->src_port = cpu_to_le16(cm_node->loc_port);
3265 tcp_info->dst_port = cpu_to_le16(cm_node->rem_port);
3266
3267 tcp_info->dest_ip_addr3 = cpu_to_le32(cm_node->rem_addr[0]);
3268 tcp_info->local_ipaddr3 = cpu_to_le32(cm_node->loc_addr[0]);
3269 tcp_info->arp_idx = cpu_to_le32(i40iw_arp_table(iwqp->iwdev,
3270 &tcp_info->dest_ip_addr3,
3271 true,
3272 NULL,
3273 I40IW_ARP_RESOLVE));
3274 } else {
3275 tcp_info->src_port = cpu_to_le16(cm_node->loc_port);
3276 tcp_info->dst_port = cpu_to_le16(cm_node->rem_port);
3277 tcp_info->dest_ip_addr0 = cpu_to_le32(cm_node->rem_addr[0]);
3278 tcp_info->dest_ip_addr1 = cpu_to_le32(cm_node->rem_addr[1]);
3279 tcp_info->dest_ip_addr2 = cpu_to_le32(cm_node->rem_addr[2]);
3280 tcp_info->dest_ip_addr3 = cpu_to_le32(cm_node->rem_addr[3]);
3281 tcp_info->local_ipaddr0 = cpu_to_le32(cm_node->loc_addr[0]);
3282 tcp_info->local_ipaddr1 = cpu_to_le32(cm_node->loc_addr[1]);
3283 tcp_info->local_ipaddr2 = cpu_to_le32(cm_node->loc_addr[2]);
3284 tcp_info->local_ipaddr3 = cpu_to_le32(cm_node->loc_addr[3]);
3285 tcp_info->arp_idx = cpu_to_le32(i40iw_arp_table(
3286 iwqp->iwdev,
3287 &tcp_info->dest_ip_addr0,
3288 false,
3289 NULL,
3290 I40IW_ARP_RESOLVE));
3291 }
3292 }
3293
3294 /**
3295 * i40iw_cm_init_tsa_conn - setup qp for RTS
3296 * @iwqp: associate qp for the connection
3297 * @cm_node: connection's node
3298 */
3299 static void i40iw_cm_init_tsa_conn(struct i40iw_qp *iwqp,
3300 struct i40iw_cm_node *cm_node)
3301 {
3302 struct i40iw_tcp_offload_info tcp_info;
3303 struct i40iwarp_offload_info *iwarp_info;
3304 struct i40iw_qp_host_ctx_info *ctx_info;
3305 struct i40iw_device *iwdev = iwqp->iwdev;
3306 struct i40iw_sc_dev *dev = &iwqp->iwdev->sc_dev;
3307
3308 memset(&tcp_info, 0x00, sizeof(struct i40iw_tcp_offload_info));
3309 iwarp_info = &iwqp->iwarp_info;
3310 ctx_info = &iwqp->ctx_info;
3311
3312 ctx_info->tcp_info = &tcp_info;
3313 ctx_info->send_cq_num = iwqp->iwscq->sc_cq.cq_uk.cq_id;
3314 ctx_info->rcv_cq_num = iwqp->iwrcq->sc_cq.cq_uk.cq_id;
3315
3316 iwarp_info->ord_size = cm_node->ord_size;
3317 iwarp_info->ird_size = i40iw_derive_hw_ird_setting(cm_node->ird_size);
3318
3319 if (iwarp_info->ord_size == 1)
3320 iwarp_info->ord_size = 2;
3321
3322 iwarp_info->rd_enable = true;
3323 iwarp_info->rdmap_ver = 1;
3324 iwarp_info->ddp_ver = 1;
3325
3326 iwarp_info->pd_id = iwqp->iwpd->sc_pd.pd_id;
3327
3328 ctx_info->tcp_info_valid = true;
3329 ctx_info->iwarp_info_valid = true;
3330
3331 i40iw_init_tcp_ctx(cm_node, &tcp_info, iwqp);
3332 if (cm_node->snd_mark_en) {
3333 iwarp_info->snd_mark_en = true;
3334 iwarp_info->snd_mark_offset = (tcp_info.snd_nxt &
3335 SNDMARKER_SEQNMASK) + cm_node->lsmm_size;
3336 }
3337
3338 cm_node->state = I40IW_CM_STATE_OFFLOADED;
3339 tcp_info.tcp_state = I40IW_TCP_STATE_ESTABLISHED;
3340 tcp_info.src_mac_addr_idx = iwdev->mac_ip_table_idx;
3341
3342 dev->iw_priv_qp_ops->qp_setctx(&iwqp->sc_qp, (u64 *)(iwqp->host_ctx.va), ctx_info);
3343
3344 /* once tcp_info is set, no need to do it again */
3345 ctx_info->tcp_info_valid = false;
3346 ctx_info->iwarp_info_valid = false;
3347 }
3348
3349 /**
3350 * i40iw_cm_disconn - when a connection is being closed
3351 * @iwqp: associate qp for the connection
3352 */
3353 int i40iw_cm_disconn(struct i40iw_qp *iwqp)
3354 {
3355 struct disconn_work *work;
3356 struct i40iw_device *iwdev = iwqp->iwdev;
3357 struct i40iw_cm_core *cm_core = &iwdev->cm_core;
3358
3359 work = kzalloc(sizeof(*work), GFP_ATOMIC);
3360 if (!work)
3361 return -ENOMEM; /* Timer will clean up */
3362
3363 i40iw_add_ref(&iwqp->ibqp);
3364 work->iwqp = iwqp;
3365 INIT_WORK(&work->work, i40iw_disconnect_worker);
3366 queue_work(cm_core->disconn_wq, &work->work);
3367 return 0;
3368 }
3369
3370 /**
3371 * i40iw_loopback_nop - Send a nop
3372 * @qp: associated hw qp
3373 */
3374 static void i40iw_loopback_nop(struct i40iw_sc_qp *qp)
3375 {
3376 u64 *wqe;
3377 u64 header;
3378
3379 wqe = qp->qp_uk.sq_base->elem;
3380 set_64bit_val(wqe, 0, 0);
3381 set_64bit_val(wqe, 8, 0);
3382 set_64bit_val(wqe, 16, 0);
3383
3384 header = LS_64(I40IWQP_OP_NOP, I40IWQPSQ_OPCODE) |
3385 LS_64(0, I40IWQPSQ_SIGCOMPL) |
3386 LS_64(qp->qp_uk.swqe_polarity, I40IWQPSQ_VALID);
3387 set_64bit_val(wqe, 24, header);
3388 }
3389
3390 /**
3391 * i40iw_qp_disconnect - free qp and close cm
3392 * @iwqp: associate qp for the connection
3393 */
3394 static void i40iw_qp_disconnect(struct i40iw_qp *iwqp)
3395 {
3396 struct i40iw_device *iwdev;
3397 struct i40iw_ib_device *iwibdev;
3398
3399 iwdev = to_iwdev(iwqp->ibqp.device);
3400 if (!iwdev) {
3401 i40iw_pr_err("iwdev == NULL\n");
3402 return;
3403 }
3404
3405 iwibdev = iwdev->iwibdev;
3406
3407 if (iwqp->active_conn) {
3408 /* indicate this connection is NOT active */
3409 iwqp->active_conn = 0;
3410 } else {
3411 /* Need to free the Last Streaming Mode Message */
3412 if (iwqp->ietf_mem.va) {
3413 if (iwqp->lsmm_mr)
3414 iwibdev->ibdev.dereg_mr(iwqp->lsmm_mr);
3415 i40iw_free_dma_mem(iwdev->sc_dev.hw, &iwqp->ietf_mem);
3416 }
3417 }
3418
3419 /* close the CM node down if it is still active */
3420 if (iwqp->cm_node) {
3421 i40iw_debug(&iwdev->sc_dev, I40IW_DEBUG_CM, "%s Call close API\n", __func__);
3422 i40iw_cm_close(iwqp->cm_node);
3423 }
3424 }
3425
3426 /**
3427 * i40iw_cm_disconn_true - called by worker thread to disconnect qp
3428 * @iwqp: associate qp for the connection
3429 */
3430 static void i40iw_cm_disconn_true(struct i40iw_qp *iwqp)
3431 {
3432 struct iw_cm_id *cm_id;
3433 struct i40iw_device *iwdev;
3434 struct i40iw_sc_qp *qp = &iwqp->sc_qp;
3435 u16 last_ae;
3436 u8 original_hw_tcp_state;
3437 u8 original_ibqp_state;
3438 int disconn_status = 0;
3439 int issue_disconn = 0;
3440 int issue_close = 0;
3441 int issue_flush = 0;
3442 struct ib_event ibevent;
3443 unsigned long flags;
3444 int ret;
3445
3446 if (!iwqp) {
3447 i40iw_pr_err("iwqp == NULL\n");
3448 return;
3449 }
3450
3451 spin_lock_irqsave(&iwqp->lock, flags);
3452 cm_id = iwqp->cm_id;
3453 /* make sure we havent already closed this connection */
3454 if (!cm_id) {
3455 spin_unlock_irqrestore(&iwqp->lock, flags);
3456 return;
3457 }
3458
3459 iwdev = to_iwdev(iwqp->ibqp.device);
3460
3461 original_hw_tcp_state = iwqp->hw_tcp_state;
3462 original_ibqp_state = iwqp->ibqp_state;
3463 last_ae = iwqp->last_aeq;
3464
3465 if (qp->term_flags) {
3466 issue_disconn = 1;
3467 issue_close = 1;
3468 iwqp->cm_id = NULL;
3469 /*When term timer expires after cm_timer, don't want
3470 *terminate-handler to issue cm_disconn which can re-free
3471 *a QP even after its refcnt=0.
3472 */
3473 del_timer(&iwqp->terminate_timer);
3474 if (!iwqp->flush_issued) {
3475 iwqp->flush_issued = 1;
3476 issue_flush = 1;
3477 }
3478 } else if ((original_hw_tcp_state == I40IW_TCP_STATE_CLOSE_WAIT) ||
3479 ((original_ibqp_state == IB_QPS_RTS) &&
3480 (last_ae == I40IW_AE_LLP_CONNECTION_RESET))) {
3481 issue_disconn = 1;
3482 if (last_ae == I40IW_AE_LLP_CONNECTION_RESET)
3483 disconn_status = -ECONNRESET;
3484 }
3485
3486 if (((original_hw_tcp_state == I40IW_TCP_STATE_CLOSED) ||
3487 (original_hw_tcp_state == I40IW_TCP_STATE_TIME_WAIT) ||
3488 (last_ae == I40IW_AE_RDMAP_ROE_BAD_LLP_CLOSE) ||
3489 (last_ae == I40IW_AE_LLP_CONNECTION_RESET))) {
3490 issue_close = 1;
3491 iwqp->cm_id = NULL;
3492 if (!iwqp->flush_issued) {
3493 iwqp->flush_issued = 1;
3494 issue_flush = 1;
3495 }
3496 }
3497
3498 spin_unlock_irqrestore(&iwqp->lock, flags);
3499 if (issue_flush && !iwqp->destroyed) {
3500 /* Flush the queues */
3501 i40iw_flush_wqes(iwdev, iwqp);
3502
3503 if (qp->term_flags) {
3504 ibevent.device = iwqp->ibqp.device;
3505 ibevent.event = (qp->eventtype == TERM_EVENT_QP_FATAL) ?
3506 IB_EVENT_QP_FATAL : IB_EVENT_QP_ACCESS_ERR;
3507 ibevent.element.qp = &iwqp->ibqp;
3508 iwqp->ibqp.event_handler(&ibevent, iwqp->ibqp.qp_context);
3509 }
3510 }
3511
3512 if (cm_id && cm_id->event_handler) {
3513 if (issue_disconn) {
3514 ret = i40iw_send_cm_event(NULL,
3515 cm_id,
3516 IW_CM_EVENT_DISCONNECT,
3517 disconn_status);
3518
3519 if (ret)
3520 i40iw_debug(&iwdev->sc_dev,
3521 I40IW_DEBUG_CM,
3522 "disconnect event failed %s: - cm_id = %p\n",
3523 __func__, cm_id);
3524 }
3525 if (issue_close) {
3526 i40iw_qp_disconnect(iwqp);
3527 cm_id->provider_data = iwqp;
3528 ret = i40iw_send_cm_event(NULL, cm_id, IW_CM_EVENT_CLOSE, 0);
3529 if (ret)
3530 i40iw_debug(&iwdev->sc_dev,
3531 I40IW_DEBUG_CM,
3532 "close event failed %s: - cm_id = %p\n",
3533 __func__, cm_id);
3534 cm_id->rem_ref(cm_id);
3535 }
3536 }
3537 }
3538
3539 /**
3540 * i40iw_disconnect_worker - worker for connection close
3541 * @work: points or disconn structure
3542 */
3543 static void i40iw_disconnect_worker(struct work_struct *work)
3544 {
3545 struct disconn_work *dwork = container_of(work, struct disconn_work, work);
3546 struct i40iw_qp *iwqp = dwork->iwqp;
3547
3548 kfree(dwork);
3549 i40iw_cm_disconn_true(iwqp);
3550 i40iw_rem_ref(&iwqp->ibqp);
3551 }
3552
3553 /**
3554 * i40iw_accept - registered call for connection to be accepted
3555 * @cm_id: cm information for passive connection
3556 * @conn_param: accpet parameters
3557 */
3558 int i40iw_accept(struct iw_cm_id *cm_id, struct iw_cm_conn_param *conn_param)
3559 {
3560 struct ib_qp *ibqp;
3561 struct i40iw_qp *iwqp;
3562 struct i40iw_device *iwdev;
3563 struct i40iw_sc_dev *dev;
3564 struct i40iw_cm_node *cm_node;
3565 struct ib_qp_attr attr;
3566 int passive_state;
3567 struct i40iw_ib_device *iwibdev;
3568 struct ib_mr *ibmr;
3569 struct i40iw_pd *iwpd;
3570 u16 buf_len = 0;
3571 struct i40iw_kmem_info accept;
3572 enum i40iw_status_code status;
3573 u64 tagged_offset;
3574
3575 memset(&attr, 0, sizeof(attr));
3576 ibqp = i40iw_get_qp(cm_id->device, conn_param->qpn);
3577 if (!ibqp)
3578 return -EINVAL;
3579
3580 iwqp = to_iwqp(ibqp);
3581 iwdev = iwqp->iwdev;
3582 dev = &iwdev->sc_dev;
3583 cm_node = (struct i40iw_cm_node *)cm_id->provider_data;
3584
3585 if (((struct sockaddr_in *)&cm_id->local_addr)->sin_family == AF_INET) {
3586 cm_node->ipv4 = true;
3587 cm_node->vlan_id = i40iw_get_vlan_ipv4(cm_node->loc_addr);
3588 } else {
3589 cm_node->ipv4 = false;
3590 i40iw_netdev_vlan_ipv6(cm_node->loc_addr, &cm_node->vlan_id, NULL);
3591 }
3592 i40iw_debug(cm_node->dev,
3593 I40IW_DEBUG_CM,
3594 "Accept vlan_id=%d\n",
3595 cm_node->vlan_id);
3596 if (cm_node->state == I40IW_CM_STATE_LISTENER_DESTROYED) {
3597 if (cm_node->loopbackpartner)
3598 i40iw_rem_ref_cm_node(cm_node->loopbackpartner);
3599 i40iw_rem_ref_cm_node(cm_node);
3600 return -EINVAL;
3601 }
3602
3603 passive_state = atomic_add_return(1, &cm_node->passive_state);
3604 if (passive_state == I40IW_SEND_RESET_EVENT) {
3605 i40iw_rem_ref_cm_node(cm_node);
3606 return -ECONNRESET;
3607 }
3608
3609 cm_node->cm_core->stats_accepts++;
3610 iwqp->cm_node = (void *)cm_node;
3611 cm_node->iwqp = iwqp;
3612
3613 buf_len = conn_param->private_data_len + I40IW_MAX_IETF_SIZE + MPA_ZERO_PAD_LEN;
3614
3615 status = i40iw_allocate_dma_mem(dev->hw, &iwqp->ietf_mem, buf_len, 1);
3616
3617 if (status)
3618 return -ENOMEM;
3619 cm_node->pdata.size = conn_param->private_data_len;
3620 accept.addr = iwqp->ietf_mem.va;
3621 accept.size = i40iw_cm_build_mpa_frame(cm_node, &accept, MPA_KEY_REPLY);
3622 memcpy(accept.addr + accept.size, conn_param->private_data,
3623 conn_param->private_data_len);
3624
3625 /* setup our first outgoing iWarp send WQE (the IETF frame response) */
3626 if ((cm_node->ipv4 &&
3627 !i40iw_ipv4_is_loopback(cm_node->loc_addr[0], cm_node->rem_addr[0])) ||
3628 (!cm_node->ipv4 &&
3629 !i40iw_ipv6_is_loopback(cm_node->loc_addr, cm_node->rem_addr))) {
3630 iwibdev = iwdev->iwibdev;
3631 iwpd = iwqp->iwpd;
3632 tagged_offset = (uintptr_t)iwqp->ietf_mem.va;
3633 ibmr = i40iw_reg_phys_mr(&iwpd->ibpd,
3634 iwqp->ietf_mem.pa,
3635 buf_len,
3636 IB_ACCESS_LOCAL_WRITE,
3637 &tagged_offset);
3638 if (IS_ERR(ibmr)) {
3639 i40iw_free_dma_mem(dev->hw, &iwqp->ietf_mem);
3640 return -ENOMEM;
3641 }
3642
3643 ibmr->pd = &iwpd->ibpd;
3644 ibmr->device = iwpd->ibpd.device;
3645 iwqp->lsmm_mr = ibmr;
3646 if (iwqp->page)
3647 iwqp->sc_qp.qp_uk.sq_base = kmap(iwqp->page);
3648 if (is_remote_ne020_or_chelsio(cm_node))
3649 dev->iw_priv_qp_ops->qp_send_lsmm(
3650 &iwqp->sc_qp,
3651 iwqp->ietf_mem.va,
3652 (accept.size + conn_param->private_data_len),
3653 ibmr->lkey);
3654 else
3655 dev->iw_priv_qp_ops->qp_send_lsmm(
3656 &iwqp->sc_qp,
3657 iwqp->ietf_mem.va,
3658 (accept.size + conn_param->private_data_len + MPA_ZERO_PAD_LEN),
3659 ibmr->lkey);
3660
3661 } else {
3662 if (iwqp->page)
3663 iwqp->sc_qp.qp_uk.sq_base = kmap(iwqp->page);
3664 i40iw_loopback_nop(&iwqp->sc_qp);
3665 }
3666
3667 if (iwqp->page)
3668 kunmap(iwqp->page);
3669
3670 iwqp->cm_id = cm_id;
3671 cm_node->cm_id = cm_id;
3672
3673 cm_id->provider_data = (void *)iwqp;
3674 iwqp->active_conn = 0;
3675
3676 cm_node->lsmm_size = accept.size + conn_param->private_data_len;
3677 i40iw_cm_init_tsa_conn(iwqp, cm_node);
3678 cm_id->add_ref(cm_id);
3679 i40iw_add_ref(&iwqp->ibqp);
3680
3681 i40iw_send_cm_event(cm_node, cm_id, IW_CM_EVENT_ESTABLISHED, 0);
3682
3683 attr.qp_state = IB_QPS_RTS;
3684 cm_node->qhash_set = false;
3685 i40iw_modify_qp(&iwqp->ibqp, &attr, IB_QP_STATE, NULL);
3686 if (cm_node->loopbackpartner) {
3687 cm_node->loopbackpartner->pdata.size = conn_param->private_data_len;
3688
3689 /* copy entire MPA frame to our cm_node's frame */
3690 memcpy(cm_node->loopbackpartner->pdata_buf,
3691 conn_param->private_data,
3692 conn_param->private_data_len);
3693 i40iw_create_event(cm_node->loopbackpartner, I40IW_CM_EVENT_CONNECTED);
3694 }
3695
3696 cm_node->accelerated = 1;
3697 if (cm_node->accept_pend) {
3698 if (!cm_node->listener)
3699 i40iw_pr_err("cm_node->listener NULL for passive node\n");
3700 atomic_dec(&cm_node->listener->pend_accepts_cnt);
3701 cm_node->accept_pend = 0;
3702 }
3703 return 0;
3704 }
3705
3706 /**
3707 * i40iw_reject - registered call for connection to be rejected
3708 * @cm_id: cm information for passive connection
3709 * @pdata: private data to be sent
3710 * @pdata_len: private data length
3711 */
3712 int i40iw_reject(struct iw_cm_id *cm_id, const void *pdata, u8 pdata_len)
3713 {
3714 struct i40iw_device *iwdev;
3715 struct i40iw_cm_node *cm_node;
3716 struct i40iw_cm_node *loopback;
3717
3718 cm_node = (struct i40iw_cm_node *)cm_id->provider_data;
3719 loopback = cm_node->loopbackpartner;
3720 cm_node->cm_id = cm_id;
3721 cm_node->pdata.size = pdata_len;
3722
3723 iwdev = to_iwdev(cm_id->device);
3724 if (!iwdev)
3725 return -EINVAL;
3726 cm_node->cm_core->stats_rejects++;
3727
3728 if (pdata_len + sizeof(struct ietf_mpa_v2) > MAX_CM_BUFFER)
3729 return -EINVAL;
3730
3731 if (loopback) {
3732 memcpy(&loopback->pdata_buf, pdata, pdata_len);
3733 loopback->pdata.size = pdata_len;
3734 }
3735
3736 return i40iw_cm_reject(cm_node, pdata, pdata_len);
3737 }
3738
3739 /**
3740 * i40iw_connect - registered call for connection to be established
3741 * @cm_id: cm information for passive connection
3742 * @conn_param: Information about the connection
3743 */
3744 int i40iw_connect(struct iw_cm_id *cm_id, struct iw_cm_conn_param *conn_param)
3745 {
3746 struct ib_qp *ibqp;
3747 struct i40iw_qp *iwqp;
3748 struct i40iw_device *iwdev;
3749 struct i40iw_cm_node *cm_node;
3750 struct i40iw_cm_info cm_info;
3751 struct sockaddr_in *laddr;
3752 struct sockaddr_in *raddr;
3753 struct sockaddr_in6 *laddr6;
3754 struct sockaddr_in6 *raddr6;
3755 int apbvt_set = 0;
3756 enum i40iw_status_code status;
3757
3758 ibqp = i40iw_get_qp(cm_id->device, conn_param->qpn);
3759 if (!ibqp)
3760 return -EINVAL;
3761 iwqp = to_iwqp(ibqp);
3762 if (!iwqp)
3763 return -EINVAL;
3764 iwdev = to_iwdev(iwqp->ibqp.device);
3765 if (!iwdev)
3766 return -EINVAL;
3767
3768 laddr = (struct sockaddr_in *)&cm_id->m_local_addr;
3769 raddr = (struct sockaddr_in *)&cm_id->m_remote_addr;
3770 laddr6 = (struct sockaddr_in6 *)&cm_id->m_local_addr;
3771 raddr6 = (struct sockaddr_in6 *)&cm_id->m_remote_addr;
3772
3773 if (!(laddr->sin_port) || !(raddr->sin_port))
3774 return -EINVAL;
3775
3776 iwqp->active_conn = 1;
3777 iwqp->cm_id = NULL;
3778 cm_id->provider_data = iwqp;
3779
3780 /* set up the connection params for the node */
3781 if (cm_id->remote_addr.ss_family == AF_INET) {
3782 cm_info.ipv4 = true;
3783 memset(cm_info.loc_addr, 0, sizeof(cm_info.loc_addr));
3784 memset(cm_info.rem_addr, 0, sizeof(cm_info.rem_addr));
3785 cm_info.loc_addr[0] = ntohl(laddr->sin_addr.s_addr);
3786 cm_info.rem_addr[0] = ntohl(raddr->sin_addr.s_addr);
3787 cm_info.loc_port = ntohs(laddr->sin_port);
3788 cm_info.rem_port = ntohs(raddr->sin_port);
3789 cm_info.vlan_id = i40iw_get_vlan_ipv4(cm_info.loc_addr);
3790 } else {
3791 cm_info.ipv4 = false;
3792 i40iw_copy_ip_ntohl(cm_info.loc_addr,
3793 laddr6->sin6_addr.in6_u.u6_addr32);
3794 i40iw_copy_ip_ntohl(cm_info.rem_addr,
3795 raddr6->sin6_addr.in6_u.u6_addr32);
3796 cm_info.loc_port = ntohs(laddr6->sin6_port);
3797 cm_info.rem_port = ntohs(raddr6->sin6_port);
3798 i40iw_netdev_vlan_ipv6(cm_info.loc_addr, &cm_info.vlan_id, NULL);
3799 }
3800 cm_info.cm_id = cm_id;
3801 if ((cm_info.ipv4 && (laddr->sin_addr.s_addr != raddr->sin_addr.s_addr)) ||
3802 (!cm_info.ipv4 && memcmp(laddr6->sin6_addr.in6_u.u6_addr32,
3803 raddr6->sin6_addr.in6_u.u6_addr32,
3804 sizeof(laddr6->sin6_addr.in6_u.u6_addr32)))) {
3805 status = i40iw_manage_qhash(iwdev,
3806 &cm_info,
3807 I40IW_QHASH_TYPE_TCP_ESTABLISHED,
3808 I40IW_QHASH_MANAGE_TYPE_ADD,
3809 NULL,
3810 true);
3811 if (status)
3812 return -EINVAL;
3813 }
3814 status = i40iw_manage_apbvt(iwdev, cm_info.loc_port, I40IW_MANAGE_APBVT_ADD);
3815 if (status) {
3816 i40iw_manage_qhash(iwdev,
3817 &cm_info,
3818 I40IW_QHASH_TYPE_TCP_ESTABLISHED,
3819 I40IW_QHASH_MANAGE_TYPE_DELETE,
3820 NULL,
3821 false);
3822 return -EINVAL;
3823 }
3824
3825 apbvt_set = 1;
3826 cm_id->add_ref(cm_id);
3827 cm_node = i40iw_create_cm_node(&iwdev->cm_core, iwdev,
3828 conn_param->private_data_len,
3829 (void *)conn_param->private_data,
3830 &cm_info);
3831 if (!cm_node) {
3832 i40iw_manage_qhash(iwdev,
3833 &cm_info,
3834 I40IW_QHASH_TYPE_TCP_ESTABLISHED,
3835 I40IW_QHASH_MANAGE_TYPE_DELETE,
3836 NULL,
3837 false);
3838
3839 if (apbvt_set && !i40iw_listen_port_in_use(&iwdev->cm_core,
3840 cm_info.loc_port))
3841 i40iw_manage_apbvt(iwdev,
3842 cm_info.loc_port,
3843 I40IW_MANAGE_APBVT_DEL);
3844 cm_id->rem_ref(cm_id);
3845 iwdev->cm_core.stats_connect_errs++;
3846 return -ENOMEM;
3847 }
3848
3849 i40iw_record_ird_ord(cm_node, (u16)conn_param->ird, (u16)conn_param->ord);
3850 if (cm_node->send_rdma0_op == SEND_RDMA_READ_ZERO &&
3851 !cm_node->ord_size)
3852 cm_node->ord_size = 1;
3853
3854 cm_node->apbvt_set = apbvt_set;
3855 cm_node->qhash_set = true;
3856 iwqp->cm_node = cm_node;
3857 cm_node->iwqp = iwqp;
3858 iwqp->cm_id = cm_id;
3859 i40iw_add_ref(&iwqp->ibqp);
3860 return 0;
3861 }
3862
3863 /**
3864 * i40iw_create_listen - registered call creating listener
3865 * @cm_id: cm information for passive connection
3866 * @backlog: to max accept pending count
3867 */
3868 int i40iw_create_listen(struct iw_cm_id *cm_id, int backlog)
3869 {
3870 struct i40iw_device *iwdev;
3871 struct i40iw_cm_listener *cm_listen_node;
3872 struct i40iw_cm_info cm_info;
3873 enum i40iw_status_code ret;
3874 struct sockaddr_in *laddr;
3875 struct sockaddr_in6 *laddr6;
3876 bool wildcard = false;
3877
3878 iwdev = to_iwdev(cm_id->device);
3879 if (!iwdev)
3880 return -EINVAL;
3881
3882 laddr = (struct sockaddr_in *)&cm_id->m_local_addr;
3883 laddr6 = (struct sockaddr_in6 *)&cm_id->m_local_addr;
3884 memset(&cm_info, 0, sizeof(cm_info));
3885 if (laddr->sin_family == AF_INET) {
3886 cm_info.ipv4 = true;
3887 cm_info.loc_addr[0] = ntohl(laddr->sin_addr.s_addr);
3888 cm_info.loc_port = ntohs(laddr->sin_port);
3889
3890 if (laddr->sin_addr.s_addr != INADDR_ANY)
3891 cm_info.vlan_id = i40iw_get_vlan_ipv4(cm_info.loc_addr);
3892 else
3893 wildcard = true;
3894
3895 } else {
3896 cm_info.ipv4 = false;
3897 i40iw_copy_ip_ntohl(cm_info.loc_addr,
3898 laddr6->sin6_addr.in6_u.u6_addr32);
3899 cm_info.loc_port = ntohs(laddr6->sin6_port);
3900 if (ipv6_addr_type(&laddr6->sin6_addr) != IPV6_ADDR_ANY)
3901 i40iw_netdev_vlan_ipv6(cm_info.loc_addr,
3902 &cm_info.vlan_id,
3903 NULL);
3904 else
3905 wildcard = true;
3906 }
3907 cm_info.backlog = backlog;
3908 cm_info.cm_id = cm_id;
3909
3910 cm_listen_node = i40iw_make_listen_node(&iwdev->cm_core, iwdev, &cm_info);
3911 if (!cm_listen_node) {
3912 i40iw_pr_err("cm_listen_node == NULL\n");
3913 return -ENOMEM;
3914 }
3915
3916 cm_id->provider_data = cm_listen_node;
3917
3918 if (!cm_listen_node->reused_node) {
3919 if (wildcard) {
3920 if (cm_info.ipv4)
3921 ret = i40iw_add_mqh_4(iwdev,
3922 &cm_info,
3923 cm_listen_node);
3924 else
3925 ret = i40iw_add_mqh_6(iwdev,
3926 &cm_info,
3927 cm_listen_node);
3928 if (ret)
3929 goto error;
3930
3931 ret = i40iw_manage_apbvt(iwdev,
3932 cm_info.loc_port,
3933 I40IW_MANAGE_APBVT_ADD);
3934
3935 if (ret)
3936 goto error;
3937 } else {
3938 ret = i40iw_manage_qhash(iwdev,
3939 &cm_info,
3940 I40IW_QHASH_TYPE_TCP_SYN,
3941 I40IW_QHASH_MANAGE_TYPE_ADD,
3942 NULL,
3943 true);
3944 if (ret)
3945 goto error;
3946 cm_listen_node->qhash_set = true;
3947 ret = i40iw_manage_apbvt(iwdev,
3948 cm_info.loc_port,
3949 I40IW_MANAGE_APBVT_ADD);
3950 if (ret)
3951 goto error;
3952 }
3953 }
3954 cm_id->add_ref(cm_id);
3955 cm_listen_node->cm_core->stats_listen_created++;
3956 return 0;
3957 error:
3958 i40iw_cm_del_listen(&iwdev->cm_core, (void *)cm_listen_node, false);
3959 return -EINVAL;
3960 }
3961
3962 /**
3963 * i40iw_destroy_listen - registered call to destroy listener
3964 * @cm_id: cm information for passive connection
3965 */
3966 int i40iw_destroy_listen(struct iw_cm_id *cm_id)
3967 {
3968 struct i40iw_device *iwdev;
3969
3970 iwdev = to_iwdev(cm_id->device);
3971 if (cm_id->provider_data)
3972 i40iw_cm_del_listen(&iwdev->cm_core, cm_id->provider_data, true);
3973 else
3974 i40iw_pr_err("cm_id->provider_data was NULL\n");
3975
3976 cm_id->rem_ref(cm_id);
3977
3978 return 0;
3979 }
3980
3981 /**
3982 * i40iw_cm_event_connected - handle connected active node
3983 * @event: the info for cm_node of connection
3984 */
3985 static void i40iw_cm_event_connected(struct i40iw_cm_event *event)
3986 {
3987 struct i40iw_qp *iwqp;
3988 struct i40iw_device *iwdev;
3989 struct i40iw_cm_node *cm_node;
3990 struct i40iw_sc_dev *dev;
3991 struct ib_qp_attr attr;
3992 struct iw_cm_id *cm_id;
3993 int status;
3994 bool read0;
3995
3996 cm_node = event->cm_node;
3997 cm_id = cm_node->cm_id;
3998 iwqp = (struct i40iw_qp *)cm_id->provider_data;
3999 iwdev = to_iwdev(iwqp->ibqp.device);
4000 dev = &iwdev->sc_dev;
4001
4002 if (iwqp->destroyed) {
4003 status = -ETIMEDOUT;
4004 goto error;
4005 }
4006 i40iw_cm_init_tsa_conn(iwqp, cm_node);
4007 read0 = (cm_node->send_rdma0_op == SEND_RDMA_READ_ZERO);
4008 if (iwqp->page)
4009 iwqp->sc_qp.qp_uk.sq_base = kmap(iwqp->page);
4010 dev->iw_priv_qp_ops->qp_send_rtt(&iwqp->sc_qp, read0);
4011 if (iwqp->page)
4012 kunmap(iwqp->page);
4013 status = i40iw_send_cm_event(cm_node, cm_id, IW_CM_EVENT_CONNECT_REPLY, 0);
4014 if (status)
4015 i40iw_pr_err("send cm event\n");
4016
4017 memset(&attr, 0, sizeof(attr));
4018 attr.qp_state = IB_QPS_RTS;
4019 cm_node->qhash_set = false;
4020 i40iw_modify_qp(&iwqp->ibqp, &attr, IB_QP_STATE, NULL);
4021
4022 cm_node->accelerated = 1;
4023 if (cm_node->accept_pend) {
4024 if (!cm_node->listener)
4025 i40iw_pr_err("listener is null for passive node\n");
4026 atomic_dec(&cm_node->listener->pend_accepts_cnt);
4027 cm_node->accept_pend = 0;
4028 }
4029 return;
4030
4031 error:
4032 iwqp->cm_id = NULL;
4033 cm_id->provider_data = NULL;
4034 i40iw_send_cm_event(event->cm_node,
4035 cm_id,
4036 IW_CM_EVENT_CONNECT_REPLY,
4037 status);
4038 cm_id->rem_ref(cm_id);
4039 i40iw_rem_ref_cm_node(event->cm_node);
4040 }
4041
4042 /**
4043 * i40iw_cm_event_reset - handle reset
4044 * @event: the info for cm_node of connection
4045 */
4046 static void i40iw_cm_event_reset(struct i40iw_cm_event *event)
4047 {
4048 struct i40iw_cm_node *cm_node = event->cm_node;
4049 struct iw_cm_id *cm_id = cm_node->cm_id;
4050 struct i40iw_qp *iwqp;
4051
4052 if (!cm_id)
4053 return;
4054
4055 iwqp = cm_id->provider_data;
4056 if (!iwqp)
4057 return;
4058
4059 i40iw_debug(cm_node->dev,
4060 I40IW_DEBUG_CM,
4061 "reset event %p - cm_id = %p\n",
4062 event->cm_node, cm_id);
4063 iwqp->cm_id = NULL;
4064
4065 i40iw_send_cm_event(cm_node, cm_node->cm_id, IW_CM_EVENT_DISCONNECT, -ECONNRESET);
4066 i40iw_send_cm_event(cm_node, cm_node->cm_id, IW_CM_EVENT_CLOSE, 0);
4067 }
4068
4069 /**
4070 * i40iw_cm_event_handler - worker thread callback to send event to cm upper layer
4071 * @work: pointer of cm event info.
4072 */
4073 static void i40iw_cm_event_handler(struct work_struct *work)
4074 {
4075 struct i40iw_cm_event *event = container_of(work,
4076 struct i40iw_cm_event,
4077 event_work);
4078 struct i40iw_cm_node *cm_node;
4079
4080 if (!event || !event->cm_node || !event->cm_node->cm_core)
4081 return;
4082
4083 cm_node = event->cm_node;
4084
4085 switch (event->type) {
4086 case I40IW_CM_EVENT_MPA_REQ:
4087 i40iw_send_cm_event(cm_node,
4088 cm_node->cm_id,
4089 IW_CM_EVENT_CONNECT_REQUEST,
4090 0);
4091 break;
4092 case I40IW_CM_EVENT_RESET:
4093 i40iw_cm_event_reset(event);
4094 break;
4095 case I40IW_CM_EVENT_CONNECTED:
4096 if (!event->cm_node->cm_id ||
4097 (event->cm_node->state != I40IW_CM_STATE_OFFLOADED))
4098 break;
4099 i40iw_cm_event_connected(event);
4100 break;
4101 case I40IW_CM_EVENT_MPA_REJECT:
4102 if (!event->cm_node->cm_id ||
4103 (cm_node->state == I40IW_CM_STATE_OFFLOADED))
4104 break;
4105 i40iw_send_cm_event(cm_node,
4106 cm_node->cm_id,
4107 IW_CM_EVENT_CONNECT_REPLY,
4108 -ECONNREFUSED);
4109 break;
4110 case I40IW_CM_EVENT_ABORTED:
4111 if (!event->cm_node->cm_id ||
4112 (event->cm_node->state == I40IW_CM_STATE_OFFLOADED))
4113 break;
4114 i40iw_event_connect_error(event);
4115 break;
4116 default:
4117 i40iw_pr_err("event type = %d\n", event->type);
4118 break;
4119 }
4120
4121 event->cm_info.cm_id->rem_ref(event->cm_info.cm_id);
4122 i40iw_rem_ref_cm_node(event->cm_node);
4123 kfree(event);
4124 }
4125
4126 /**
4127 * i40iw_cm_post_event - queue event request for worker thread
4128 * @event: cm node's info for up event call
4129 */
4130 static void i40iw_cm_post_event(struct i40iw_cm_event *event)
4131 {
4132 atomic_inc(&event->cm_node->ref_count);
4133 event->cm_info.cm_id->add_ref(event->cm_info.cm_id);
4134 INIT_WORK(&event->event_work, i40iw_cm_event_handler);
4135
4136 queue_work(event->cm_node->cm_core->event_wq, &event->event_work);
4137 }
Linux kernel - Deliverables
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