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Merge tag 'for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mst/vhost
[mirror_ubuntu-artful-kernel.git] / drivers / infiniband / hw / i40iw / i40iw_cm.c
CommitLineData
f27b4746
FL		 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
65static void i40iw_rem_ref_cm_node(struct i40iw_cm_node *);
66static void i40iw_cm_post_event(struct i40iw_cm_event *event);
67static void i40iw_disconnect_worker(struct work_struct *work);
68
69/**
70 * i40iw_free_sqbuf - put back puda buffer if refcount = 0
d6f7bbcc 71 * @vsi: pointer to vsi structure
f27b4746
FL		 72 * @buf: puda buffer to free
73 */
d6f7bbcc 74void i40iw_free_sqbuf(struct i40iw_sc_vsi *vsi, void *bufp)
f27b4746
FL		 75{
76 struct i40iw_puda_buf *buf = (struct i40iw_puda_buf *)bufp;
d6f7bbcc 77 struct i40iw_puda_rsrc *ilq = vsi->ilq;
f27b4746
FL		 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 */
92static 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 */
128static 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 */
145void 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 */
158static 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 */
171static 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 */
192static 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
f27b4746
FL		 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*/
215static 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));
f27b4746
FL		 222 cm_info->loc_port = cm_node->loc_port;
223 cm_info->rem_port = cm_node->rem_port;
0fc2dc58 224 cm_info->user_pri = cm_node->user_pri;
f27b4746
FL		 225}
226
227/**
228 * i40iw_get_cmevent_info - for cm event upcall
229 * @cm_node: connection's node
230 * @cm_id: upper layers cm struct for the event
231 * @event: upper layer's cm event
232 */
233static inline void i40iw_get_cmevent_info(struct i40iw_cm_node *cm_node,
234 struct iw_cm_id *cm_id,
235 struct iw_cm_event *event)
236{
8d8cd0bf 237 memcpy(&event->local_addr, &cm_id->m_local_addr,
f27b4746 238 sizeof(event->local_addr));
8d8cd0bf 239 memcpy(&event->remote_addr, &cm_id->m_remote_addr,
f27b4746
FL		 240 sizeof(event->remote_addr));
241 if (cm_node) {
242 event->private_data = (void *)cm_node->pdata_buf;
243 event->private_data_len = (u8)cm_node->pdata.size;
244 event->ird = cm_node->ird_size;
245 event->ord = cm_node->ord_size;
246 }
247}
248
249/**
250 * i40iw_send_cm_event - upcall cm's event handler
251 * @cm_node: connection's node
252 * @cm_id: upper layer's cm info struct
253 * @type: Event type to indicate
254 * @status: status for the event type
255 */
256static int i40iw_send_cm_event(struct i40iw_cm_node *cm_node,
257 struct iw_cm_id *cm_id,
258 enum iw_cm_event_type type,
259 int status)
260{
261 struct iw_cm_event event;
262
263 memset(&event, 0, sizeof(event));
264 event.event = type;
265 event.status = status;
266 switch (type) {
267 case IW_CM_EVENT_CONNECT_REQUEST:
268 if (cm_node->ipv4)
269 i40iw_fill_sockaddr4(cm_node, &event);
270 else
271 i40iw_fill_sockaddr6(cm_node, &event);
272 event.provider_data = (void *)cm_node;
273 event.private_data = (void *)cm_node->pdata_buf;
274 event.private_data_len = (u8)cm_node->pdata.size;
fd4e906b 275 event.ird = cm_node->ird_size;
f27b4746
FL		 276 break;
277 case IW_CM_EVENT_CONNECT_REPLY:
278 i40iw_get_cmevent_info(cm_node, cm_id, &event);
279 break;
280 case IW_CM_EVENT_ESTABLISHED:
281 event.ird = cm_node->ird_size;
282 event.ord = cm_node->ord_size;
283 break;
284 case IW_CM_EVENT_DISCONNECT:
285 break;
286 case IW_CM_EVENT_CLOSE:
287 break;
288 default:
289 i40iw_pr_err("event type received type = %d\n", type);
290 return -1;
291 }
292 return cm_id->event_handler(cm_id, &event);
293}
294
295/**
296 * i40iw_create_event - create cm event
297 * @cm_node: connection's node
298 * @type: Event type to generate
299 */
300static struct i40iw_cm_event *i40iw_create_event(struct i40iw_cm_node *cm_node,
301 enum i40iw_cm_event_type type)
302{
303 struct i40iw_cm_event *event;
304
305 if (!cm_node->cm_id)
306 return NULL;
307
308 event = kzalloc(sizeof(*event), GFP_ATOMIC);
309
310 if (!event)
311 return NULL;
312
313 event->type = type;
314 event->cm_node = cm_node;
315 memcpy(event->cm_info.rem_addr, cm_node->rem_addr, sizeof(event->cm_info.rem_addr));
316 memcpy(event->cm_info.loc_addr, cm_node->loc_addr, sizeof(event->cm_info.loc_addr));
317 event->cm_info.rem_port = cm_node->rem_port;
318 event->cm_info.loc_port = cm_node->loc_port;
319 event->cm_info.cm_id = cm_node->cm_id;
320
321 i40iw_debug(cm_node->dev,
322 I40IW_DEBUG_CM,
323 "node=%p event=%p type=%u dst=%pI4 src=%pI4\n",
324 cm_node,
325 event,
326 type,
327 event->cm_info.loc_addr,
328 event->cm_info.rem_addr);
329
330 i40iw_cm_post_event(event);
331 return event;
332}
333
334/**
335 * i40iw_free_retrans_entry - free send entry
336 * @cm_node: connection's node
337 */
338static void i40iw_free_retrans_entry(struct i40iw_cm_node *cm_node)
339{
d6f7bbcc 340 struct i40iw_device *iwdev = cm_node->iwdev;
f27b4746
FL		 341 struct i40iw_timer_entry *send_entry;
342
343 send_entry = cm_node->send_entry;
344 if (send_entry) {
345 cm_node->send_entry = NULL;
d6f7bbcc 346 i40iw_free_sqbuf(&iwdev->vsi, (void *)send_entry->sqbuf);
f27b4746
FL		 347 kfree(send_entry);
348 atomic_dec(&cm_node->ref_count);
349 }
350}
351
352/**
353 * i40iw_cleanup_retrans_entry - free send entry with lock
354 * @cm_node: connection's node
355 */
356static void i40iw_cleanup_retrans_entry(struct i40iw_cm_node *cm_node)
357{
358 unsigned long flags;
359
360 spin_lock_irqsave(&cm_node->retrans_list_lock, flags);
361 i40iw_free_retrans_entry(cm_node);
362 spin_unlock_irqrestore(&cm_node->retrans_list_lock, flags);
363}
364
f27b4746
FL		 365/**
366 * i40iw_form_cm_frame - get a free packet and build frame
367 * @cm_node: connection's node ionfo to use in frame
368 * @options: pointer to options info
369 * @hdr: pointer mpa header
370 * @pdata: pointer to private data
371 * @flags: indicates FIN or ACK
372 */
373static struct i40iw_puda_buf *i40iw_form_cm_frame(struct i40iw_cm_node *cm_node,
374 struct i40iw_kmem_info *options,
375 struct i40iw_kmem_info *hdr,
376 struct i40iw_kmem_info *pdata,
377 u8 flags)
378{
379 struct i40iw_puda_buf *sqbuf;
d6f7bbcc 380 struct i40iw_sc_vsi *vsi = &cm_node->iwdev->vsi;
f27b4746
FL		 381 u8 *buf;
382
383 struct tcphdr *tcph;
384 struct iphdr *iph;
385 struct ipv6hdr *ip6h;
386 struct ethhdr *ethh;
387 u16 packetsize;
388 u16 eth_hlen = ETH_HLEN;
389 u32 opts_len = 0;
390 u32 pd_len = 0;
391 u32 hdr_len = 0;
0fc2dc58 392 u16 vtag;
f27b4746 393
d6f7bbcc 394 sqbuf = i40iw_puda_get_bufpool(vsi->ilq);
f27b4746
FL		 395 if (!sqbuf)
396 return NULL;
397 buf = sqbuf->mem.va;
398
399 if (options)
400 opts_len = (u32)options->size;
401
402 if (hdr)
403 hdr_len = hdr->size;
404
7581e96c 405 if (pdata)
f27b4746 406 pd_len = pdata->size;
f27b4746
FL		 407
408 if (cm_node->vlan_id < VLAN_TAG_PRESENT)
409 eth_hlen += 4;
410
411 if (cm_node->ipv4)
412 packetsize = sizeof(*iph) + sizeof(*tcph);
413 else
414 packetsize = sizeof(*ip6h) + sizeof(*tcph);
415 packetsize += opts_len + hdr_len + pd_len;
416
417 memset(buf, 0x00, eth_hlen + packetsize);
418
419 sqbuf->totallen = packetsize + eth_hlen;
420 sqbuf->maclen = eth_hlen;
421 sqbuf->tcphlen = sizeof(*tcph) + opts_len;
422 sqbuf->scratch = (void *)cm_node;
423
424 ethh = (struct ethhdr *)buf;
425 buf += eth_hlen;
426
427 if (cm_node->ipv4) {
428 sqbuf->ipv4 = true;
429
430 iph = (struct iphdr *)buf;
431 buf += sizeof(*iph);
432 tcph = (struct tcphdr *)buf;
433 buf += sizeof(*tcph);
434
435 ether_addr_copy(ethh->h_dest, cm_node->rem_mac);
436 ether_addr_copy(ethh->h_source, cm_node->loc_mac);
437 if (cm_node->vlan_id < VLAN_TAG_PRESENT) {
438 ((struct vlan_ethhdr *)ethh)->h_vlan_proto = htons(ETH_P_8021Q);
0fc2dc58
HO		 439 vtag = (cm_node->user_pri << VLAN_PRIO_SHIFT) | cm_node->vlan_id;
440 ((struct vlan_ethhdr *)ethh)->h_vlan_TCI = htons(vtag);
f27b4746
FL		 441
442 ((struct vlan_ethhdr *)ethh)->h_vlan_encapsulated_proto = htons(ETH_P_IP);
443 } else {
444 ethh->h_proto = htons(ETH_P_IP);
445 }
446
447 iph->version = IPVERSION;
448 iph->ihl = 5; /* 5 * 4Byte words, IP headr len */
7eb2bde7 449 iph->tos = cm_node->tos;
f27b4746
FL		 450 iph->tot_len = htons(packetsize);
451 iph->id = htons(++cm_node->tcp_cntxt.loc_id);
452
453 iph->frag_off = htons(0x4000);
454 iph->ttl = 0x40;
455 iph->protocol = IPPROTO_TCP;
8d8cd0bf
FL		 456 iph->saddr = htonl(cm_node->loc_addr[0]);
457 iph->daddr = htonl(cm_node->rem_addr[0]);
f27b4746
FL		 458 } else {
459 sqbuf->ipv4 = false;
460 ip6h = (struct ipv6hdr *)buf;
461 buf += sizeof(*ip6h);
462 tcph = (struct tcphdr *)buf;
463 buf += sizeof(*tcph);
464
465 ether_addr_copy(ethh->h_dest, cm_node->rem_mac);
466 ether_addr_copy(ethh->h_source, cm_node->loc_mac);
467 if (cm_node->vlan_id < VLAN_TAG_PRESENT) {
468 ((struct vlan_ethhdr *)ethh)->h_vlan_proto = htons(ETH_P_8021Q);
0fc2dc58
HO		 469 vtag = (cm_node->user_pri << VLAN_PRIO_SHIFT) | cm_node->vlan_id;
470 ((struct vlan_ethhdr *)ethh)->h_vlan_TCI = htons(vtag);
f27b4746
FL		 471 ((struct vlan_ethhdr *)ethh)->h_vlan_encapsulated_proto = htons(ETH_P_IPV6);
472 } else {
473 ethh->h_proto = htons(ETH_P_IPV6);
474 }
475 ip6h->version = 6;
7eb2bde7
SS		 476 ip6h->priority = cm_node->tos >> 4;
477 ip6h->flow_lbl[0] = cm_node->tos << 4;
f27b4746
FL		 478 ip6h->flow_lbl[1] = 0;
479 ip6h->flow_lbl[2] = 0;
480 ip6h->payload_len = htons(packetsize - sizeof(*ip6h));
481 ip6h->nexthdr = 6;
482 ip6h->hop_limit = 128;
f27b4746 483 i40iw_copy_ip_htonl(ip6h->saddr.in6_u.u6_addr32,
8d8cd0bf 484 cm_node->loc_addr);
f27b4746 485 i40iw_copy_ip_htonl(ip6h->daddr.in6_u.u6_addr32,
8d8cd0bf 486 cm_node->rem_addr);
f27b4746
FL		 487 }
488
8d8cd0bf
FL		 489 tcph->source = htons(cm_node->loc_port);
490 tcph->dest = htons(cm_node->rem_port);
f27b4746
FL		 491
492 tcph->seq = htonl(cm_node->tcp_cntxt.loc_seq_num);
493
494 if (flags & SET_ACK) {
495 cm_node->tcp_cntxt.loc_ack_num = cm_node->tcp_cntxt.rcv_nxt;
496 tcph->ack_seq = htonl(cm_node->tcp_cntxt.loc_ack_num);
497 tcph->ack = 1;
498 } else {
499 tcph->ack_seq = 0;
500 }
501
502 if (flags & SET_SYN) {
503 cm_node->tcp_cntxt.loc_seq_num++;
504 tcph->syn = 1;
505 } else {
506 cm_node->tcp_cntxt.loc_seq_num += hdr_len + pd_len;
507 }
508
509 if (flags & SET_FIN) {
510 cm_node->tcp_cntxt.loc_seq_num++;
511 tcph->fin = 1;
512 }
513
514 if (flags & SET_RST)
515 tcph->rst = 1;
516
517 tcph->doff = (u16)((sizeof(*tcph) + opts_len + 3) >> 2);
518 sqbuf->tcphlen = tcph->doff << 2;
519 tcph->window = htons(cm_node->tcp_cntxt.rcv_wnd);
520 tcph->urg_ptr = 0;
521
522 if (opts_len) {
523 memcpy(buf, options->addr, opts_len);
524 buf += opts_len;
525 }
526
527 if (hdr_len) {
528 memcpy(buf, hdr->addr, hdr_len);
529 buf += hdr_len;
530 }
531
5dfd5e5e
SS		 532 if (pdata && pdata->addr)
533 memcpy(buf, pdata->addr, pdata->size);
f27b4746
FL		 534
535 atomic_set(&sqbuf->refcount, 1);
536
537 return sqbuf;
538}
539
540/**
541 * i40iw_send_reset - Send RST packet
542 * @cm_node: connection's node
543 */
544static int i40iw_send_reset(struct i40iw_cm_node *cm_node)
545{
546 struct i40iw_puda_buf *sqbuf;
547 int flags = SET_RST | SET_ACK;
548
549 sqbuf = i40iw_form_cm_frame(cm_node, NULL, NULL, NULL, flags);
550 if (!sqbuf) {
551 i40iw_pr_err("no sqbuf\n");
552 return -1;
553 }
554
555 return i40iw_schedule_cm_timer(cm_node, sqbuf, I40IW_TIMER_TYPE_SEND, 0, 1);
556}
557
558/**
559 * i40iw_active_open_err - send event for active side cm error
560 * @cm_node: connection's node
561 * @reset: Flag to send reset or not
562 */
563static void i40iw_active_open_err(struct i40iw_cm_node *cm_node, bool reset)
564{
565 i40iw_cleanup_retrans_entry(cm_node);
566 cm_node->cm_core->stats_connect_errs++;
567 if (reset) {
568 i40iw_debug(cm_node->dev,
569 I40IW_DEBUG_CM,
570 "%s cm_node=%p state=%d\n",
571 __func__,
572 cm_node,
573 cm_node->state);
574 atomic_inc(&cm_node->ref_count);
575 i40iw_send_reset(cm_node);
576 }
577
578 cm_node->state = I40IW_CM_STATE_CLOSED;
579 i40iw_create_event(cm_node, I40IW_CM_EVENT_ABORTED);
580}
581
582/**
583 * i40iw_passive_open_err - handle passive side cm error
584 * @cm_node: connection's node
585 * @reset: send reset or just free cm_node
586 */
587static void i40iw_passive_open_err(struct i40iw_cm_node *cm_node, bool reset)
588{
589 i40iw_cleanup_retrans_entry(cm_node);
590 cm_node->cm_core->stats_passive_errs++;
591 cm_node->state = I40IW_CM_STATE_CLOSED;
592 i40iw_debug(cm_node->dev,
593 I40IW_DEBUG_CM,
594 "%s cm_node=%p state =%d\n",
595 __func__,
596 cm_node,
597 cm_node->state);
598 if (reset)
599 i40iw_send_reset(cm_node);
600 else
601 i40iw_rem_ref_cm_node(cm_node);
602}
603
604/**
605 * i40iw_event_connect_error - to create connect error event
606 * @event: cm information for connect event
607 */
608static void i40iw_event_connect_error(struct i40iw_cm_event *event)
609{
610 struct i40iw_qp *iwqp;
611 struct iw_cm_id *cm_id;
612
613 cm_id = event->cm_node->cm_id;
614 if (!cm_id)
615 return;
616
617 iwqp = cm_id->provider_data;
618
619 if (!iwqp || !iwqp->iwdev)
620 return;
621
622 iwqp->cm_id = NULL;
623 cm_id->provider_data = NULL;
624 i40iw_send_cm_event(event->cm_node, cm_id,
625 IW_CM_EVENT_CONNECT_REPLY,
626 -ECONNRESET);
627 cm_id->rem_ref(cm_id);
628 i40iw_rem_ref_cm_node(event->cm_node);
629}
630
631/**
632 * i40iw_process_options
633 * @cm_node: connection's node
634 * @optionsloc: point to start of options
635 * @optionsize: size of all options
636 * @syn_packet: flag if syn packet
637 */
638static int i40iw_process_options(struct i40iw_cm_node *cm_node,
639 u8 *optionsloc,
640 u32 optionsize,
641 u32 syn_packet)
642{
643 u32 tmp;
644 u32 offset = 0;
645 union all_known_options *all_options;
646 char got_mss_option = 0;
647
648 while (offset < optionsize) {
649 all_options = (union all_known_options *)(optionsloc + offset);
650 switch (all_options->as_base.optionnum) {
651 case OPTION_NUMBER_END:
652 offset = optionsize;
653 break;
654 case OPTION_NUMBER_NONE:
655 offset += 1;
656 continue;
657 case OPTION_NUMBER_MSS:
658 i40iw_debug(cm_node->dev,
659 I40IW_DEBUG_CM,
660 "%s: MSS Length: %d Offset: %d Size: %d\n",
661 __func__,
662 all_options->as_mss.length,
663 offset,
664 optionsize);
665 got_mss_option = 1;
666 if (all_options->as_mss.length != 4)
667 return -1;
668 tmp = ntohs(all_options->as_mss.mss);
669 if (tmp > 0 && tmp < cm_node->tcp_cntxt.mss)
670 cm_node->tcp_cntxt.mss = tmp;
671 break;
672 case OPTION_NUMBER_WINDOW_SCALE:
673 cm_node->tcp_cntxt.snd_wscale =
674 all_options->as_windowscale.shiftcount;
675 break;
676 default:
677 i40iw_debug(cm_node->dev,
678 I40IW_DEBUG_CM,
679 "TCP Option not understood: %x\n",
680 all_options->as_base.optionnum);
681 break;
682 }
683 offset += all_options->as_base.length;
684 }
685 if (!got_mss_option && syn_packet)
686 cm_node->tcp_cntxt.mss = I40IW_CM_DEFAULT_MSS;
687 return 0;
688}
689
690/**
691 * i40iw_handle_tcp_options -
692 * @cm_node: connection's node
693 * @tcph: pointer tcp header
694 * @optionsize: size of options rcvd
695 * @passive: active or passive flag
696 */
697static int i40iw_handle_tcp_options(struct i40iw_cm_node *cm_node,
698 struct tcphdr *tcph,
699 int optionsize,
700 int passive)
701{
702 u8 *optionsloc = (u8 *)&tcph[1];
703
704 if (optionsize) {
705 if (i40iw_process_options(cm_node,
706 optionsloc,
707 optionsize,
708 (u32)tcph->syn)) {
709 i40iw_debug(cm_node->dev,
710 I40IW_DEBUG_CM,
711 "%s: Node %p, Sending RESET\n",
712 __func__,
713 cm_node);
714 if (passive)
715 i40iw_passive_open_err(cm_node, true);
716 else
717 i40iw_active_open_err(cm_node, true);
718 return -1;
719 }
720 }
721
722 cm_node->tcp_cntxt.snd_wnd = ntohs(tcph->window) <<
723 cm_node->tcp_cntxt.snd_wscale;
724
725 if (cm_node->tcp_cntxt.snd_wnd > cm_node->tcp_cntxt.max_snd_wnd)
726 cm_node->tcp_cntxt.max_snd_wnd = cm_node->tcp_cntxt.snd_wnd;
727 return 0;
728}
729
730/**
731 * i40iw_build_mpa_v1 - build a MPA V1 frame
732 * @cm_node: connection's node
733 * @mpa_key: to do read0 or write0
734 */
735static void i40iw_build_mpa_v1(struct i40iw_cm_node *cm_node,
736 void *start_addr,
737 u8 mpa_key)
738{
739 struct ietf_mpa_v1 *mpa_frame = (struct ietf_mpa_v1 *)start_addr;
740
741 switch (mpa_key) {
742 case MPA_KEY_REQUEST:
743 memcpy(mpa_frame->key, IEFT_MPA_KEY_REQ, IETF_MPA_KEY_SIZE);
744 break;
745 case MPA_KEY_REPLY:
746 memcpy(mpa_frame->key, IEFT_MPA_KEY_REP, IETF_MPA_KEY_SIZE);
747 break;
748 default:
749 break;
750 }
751 mpa_frame->flags = IETF_MPA_FLAGS_CRC;
752 mpa_frame->rev = cm_node->mpa_frame_rev;
753 mpa_frame->priv_data_len = htons(cm_node->pdata.size);
754}
755
756/**
757 * i40iw_build_mpa_v2 - build a MPA V2 frame
758 * @cm_node: connection's node
759 * @start_addr: buffer start address
760 * @mpa_key: to do read0 or write0
761 */
762static void i40iw_build_mpa_v2(struct i40iw_cm_node *cm_node,
763 void *start_addr,
764 u8 mpa_key)
765{
766 struct ietf_mpa_v2 *mpa_frame = (struct ietf_mpa_v2 *)start_addr;
767 struct ietf_rtr_msg *rtr_msg = &mpa_frame->rtr_msg;
20c61f7e 768 u16 ctrl_ird, ctrl_ord;
f27b4746
FL		 769
770 /* initialize the upper 5 bytes of the frame */
771 i40iw_build_mpa_v1(cm_node, start_addr, mpa_key);
772 mpa_frame->flags |= IETF_MPA_V2_FLAG;
773 mpa_frame->priv_data_len += htons(IETF_RTR_MSG_SIZE);
774
775 /* initialize RTR msg */
776 if (cm_node->mpav2_ird_ord == IETF_NO_IRD_ORD) {
20c61f7e
IM		 777 ctrl_ird = IETF_NO_IRD_ORD;
778 ctrl_ord = IETF_NO_IRD_ORD;
f27b4746 779 } else {
20c61f7e 780 ctrl_ird = (cm_node->ird_size > IETF_NO_IRD_ORD) ?
f27b4746 781 IETF_NO_IRD_ORD : cm_node->ird_size;
20c61f7e 782 ctrl_ord = (cm_node->ord_size > IETF_NO_IRD_ORD) ?
f27b4746
FL		 783 IETF_NO_IRD_ORD : cm_node->ord_size;
784 }
785
20c61f7e
IM		 786 ctrl_ird |= IETF_PEER_TO_PEER;
787 ctrl_ird |= IETF_FLPDU_ZERO_LEN;
f27b4746
FL		 788
789 switch (mpa_key) {
790 case MPA_KEY_REQUEST:
20c61f7e
IM		 791 ctrl_ord |= IETF_RDMA0_WRITE;
792 ctrl_ord |= IETF_RDMA0_READ;
f27b4746
FL		 793 break;
794 case MPA_KEY_REPLY:
795 switch (cm_node->send_rdma0_op) {
796 case SEND_RDMA_WRITE_ZERO:
20c61f7e 797 ctrl_ord |= IETF_RDMA0_WRITE;
f27b4746
FL		 798 break;
799 case SEND_RDMA_READ_ZERO:
20c61f7e 800 ctrl_ord |= IETF_RDMA0_READ;
f27b4746
FL		 801 break;
802 }
803 break;
804 default:
805 break;
806 }
20c61f7e
IM		 807 rtr_msg->ctrl_ird = htons(ctrl_ird);
808 rtr_msg->ctrl_ord = htons(ctrl_ord);
f27b4746
FL		 809}
810
811/**
812 * i40iw_cm_build_mpa_frame - build mpa frame for mpa version 1 or version 2
813 * @cm_node: connection's node
814 * @mpa: mpa: data buffer
815 * @mpa_key: to do read0 or write0
816 */
817static int i40iw_cm_build_mpa_frame(struct i40iw_cm_node *cm_node,
818 struct i40iw_kmem_info *mpa,
819 u8 mpa_key)
820{
821 int hdr_len = 0;
822
823 switch (cm_node->mpa_frame_rev) {
824 case IETF_MPA_V1:
825 hdr_len = sizeof(struct ietf_mpa_v1);
826 i40iw_build_mpa_v1(cm_node, mpa->addr, mpa_key);
827 break;
828 case IETF_MPA_V2:
829 hdr_len = sizeof(struct ietf_mpa_v2);
830 i40iw_build_mpa_v2(cm_node, mpa->addr, mpa_key);
831 break;
832 default:
833 break;
834 }
835
836 return hdr_len;
837}
838
839/**
840 * i40iw_send_mpa_request - active node send mpa request to passive node
841 * @cm_node: connection's node
842 */
843static int i40iw_send_mpa_request(struct i40iw_cm_node *cm_node)
844{
845 struct i40iw_puda_buf *sqbuf;
846
847 if (!cm_node) {
848 i40iw_pr_err("cm_node == NULL\n");
849 return -1;
850 }
851
852 cm_node->mpa_hdr.addr = &cm_node->mpa_frame;
853 cm_node->mpa_hdr.size = i40iw_cm_build_mpa_frame(cm_node,
854 &cm_node->mpa_hdr,
855 MPA_KEY_REQUEST);
856 if (!cm_node->mpa_hdr.size) {
857 i40iw_pr_err("mpa size = %d\n", cm_node->mpa_hdr.size);
858 return -1;
859 }
860
861 sqbuf = i40iw_form_cm_frame(cm_node,
862 NULL,
863 &cm_node->mpa_hdr,
864 &cm_node->pdata,
865 SET_ACK);
866 if (!sqbuf) {
867 i40iw_pr_err("sq_buf == NULL\n");
868 return -1;
869 }
f27b4746
FL		 870 return i40iw_schedule_cm_timer(cm_node, sqbuf, I40IW_TIMER_TYPE_SEND, 1, 0);
871}
872
873/**
874 * i40iw_send_mpa_reject -
875 * @cm_node: connection's node
876 * @pdata: reject data for connection
877 * @plen: length of reject data
878 */
879static int i40iw_send_mpa_reject(struct i40iw_cm_node *cm_node,
880 const void *pdata,
881 u8 plen)
882{
883 struct i40iw_puda_buf *sqbuf;
884 struct i40iw_kmem_info priv_info;
885
886 cm_node->mpa_hdr.addr = &cm_node->mpa_frame;
887 cm_node->mpa_hdr.size = i40iw_cm_build_mpa_frame(cm_node,
888 &cm_node->mpa_hdr,
889 MPA_KEY_REPLY);
890
891 cm_node->mpa_frame.flags |= IETF_MPA_FLAGS_REJECT;
892 priv_info.addr = (void *)pdata;
893 priv_info.size = plen;
894
895 sqbuf = i40iw_form_cm_frame(cm_node,
896 NULL,
897 &cm_node->mpa_hdr,
898 &priv_info,
899 SET_ACK | SET_FIN);
900 if (!sqbuf) {
901 i40iw_pr_err("no sqbuf\n");
902 return -ENOMEM;
903 }
904 cm_node->state = I40IW_CM_STATE_FIN_WAIT1;
905 return i40iw_schedule_cm_timer(cm_node, sqbuf, I40IW_TIMER_TYPE_SEND, 1, 0);
906}
907
908/**
909 * recv_mpa - process an IETF MPA frame
910 * @cm_node: connection's node
911 * @buffer: Data pointer
912 * @type: to return accept or reject
913 * @len: Len of mpa buffer
914 */
915static int i40iw_parse_mpa(struct i40iw_cm_node *cm_node, u8 *buffer, u32 *type, u32 len)
916{
917 struct ietf_mpa_v1 *mpa_frame;
918 struct ietf_mpa_v2 *mpa_v2_frame;
919 struct ietf_rtr_msg *rtr_msg;
920 int mpa_hdr_len;
921 int priv_data_len;
922
923 *type = I40IW_MPA_REQUEST_ACCEPT;
924
925 if (len < sizeof(struct ietf_mpa_v1)) {
926 i40iw_pr_err("ietf buffer small (%x)\n", len);
927 return -1;
928 }
929
930 mpa_frame = (struct ietf_mpa_v1 *)buffer;
931 mpa_hdr_len = sizeof(struct ietf_mpa_v1);
932 priv_data_len = ntohs(mpa_frame->priv_data_len);
933
934 if (priv_data_len > IETF_MAX_PRIV_DATA_LEN) {
935 i40iw_pr_err("large pri_data %d\n", priv_data_len);
936 return -1;
937 }
938 if (mpa_frame->rev != IETF_MPA_V1 && mpa_frame->rev != IETF_MPA_V2) {
939 i40iw_pr_err("unsupported mpa rev = %d\n", mpa_frame->rev);
940 return -1;
941 }
942 if (mpa_frame->rev > cm_node->mpa_frame_rev) {
943 i40iw_pr_err("rev %d\n", mpa_frame->rev);
944 return -1;
945 }
946 cm_node->mpa_frame_rev = mpa_frame->rev;
947
948 if (cm_node->state != I40IW_CM_STATE_MPAREQ_SENT) {
949 if (memcmp(mpa_frame->key, IEFT_MPA_KEY_REQ, IETF_MPA_KEY_SIZE)) {
950 i40iw_pr_err("Unexpected MPA Key received\n");
951 return -1;
952 }
953 } else {
954 if (memcmp(mpa_frame->key, IEFT_MPA_KEY_REP, IETF_MPA_KEY_SIZE)) {
955 i40iw_pr_err("Unexpected MPA Key received\n");
956 return -1;
957 }
958 }
959
960 if (priv_data_len + mpa_hdr_len > len) {
961 i40iw_pr_err("ietf buffer len(%x + %x != %x)\n",
962 priv_data_len, mpa_hdr_len, len);
963 return -1;
964 }
965 if (len > MAX_CM_BUFFER) {
966 i40iw_pr_err("ietf buffer large len = %d\n", len);
967 return -1;
968 }
969
970 switch (mpa_frame->rev) {
971 case IETF_MPA_V2:{
972 u16 ird_size;
973 u16 ord_size;
974 u16 ctrl_ord;
975 u16 ctrl_ird;
976
977 mpa_v2_frame = (struct ietf_mpa_v2 *)buffer;
978 mpa_hdr_len += IETF_RTR_MSG_SIZE;
979 rtr_msg = &mpa_v2_frame->rtr_msg;
980
981 /* parse rtr message */
982 ctrl_ord = ntohs(rtr_msg->ctrl_ord);
983 ctrl_ird = ntohs(rtr_msg->ctrl_ird);
984 ird_size = ctrl_ird & IETF_NO_IRD_ORD;
985 ord_size = ctrl_ord & IETF_NO_IRD_ORD;
986
987 if (!(ctrl_ird & IETF_PEER_TO_PEER))
988 return -1;
989
990 if (ird_size == IETF_NO_IRD_ORD || ord_size == IETF_NO_IRD_ORD) {
991 cm_node->mpav2_ird_ord = IETF_NO_IRD_ORD;
992 goto negotiate_done;
993 }
994
995 if (cm_node->state != I40IW_CM_STATE_MPAREQ_SENT) {
996 /* responder */
997 if (!ord_size && (ctrl_ord & IETF_RDMA0_READ))
998 cm_node->ird_size = 1;
999 if (cm_node->ord_size > ird_size)
1000 cm_node->ord_size = ird_size;
1001 } else {
1002 /* initiator */
1003 if (!ird_size && (ctrl_ord & IETF_RDMA0_READ))
1004 return -1;
1005 if (cm_node->ord_size > ird_size)
1006 cm_node->ord_size = ird_size;
1007
1008 if (cm_node->ird_size < ord_size)
1009 /* no resources available */
1010 return -1;
1011 }
1012
1013negotiate_done:
1014 if (ctrl_ord & IETF_RDMA0_READ)
1015 cm_node->send_rdma0_op = SEND_RDMA_READ_ZERO;
1016 else if (ctrl_ord & IETF_RDMA0_WRITE)
1017 cm_node->send_rdma0_op = SEND_RDMA_WRITE_ZERO;
1018 else /* Not supported RDMA0 operation */
1019 return -1;
1020 i40iw_debug(cm_node->dev, I40IW_DEBUG_CM,
1021 "MPAV2: Negotiated ORD: %d, IRD: %d\n",
1022 cm_node->ord_size, cm_node->ird_size);
1023 break;
1024 }
1025 break;
1026 case IETF_MPA_V1:
1027 default:
1028 break;
1029 }
1030
1031 memcpy(cm_node->pdata_buf, buffer + mpa_hdr_len, priv_data_len);
1032 cm_node->pdata.size = priv_data_len;
1033
1034 if (mpa_frame->flags & IETF_MPA_FLAGS_REJECT)
1035 *type = I40IW_MPA_REQUEST_REJECT;
1036
1037 if (mpa_frame->flags & IETF_MPA_FLAGS_MARKERS)
1038 cm_node->snd_mark_en = true;
1039
1040 return 0;
1041}
1042
1043/**
1044 * i40iw_schedule_cm_timer
1045 * @@cm_node: connection's node
1046 * @sqbuf: buffer to send
1047 * @type: if it es send ot close
1048 * @send_retrans: if rexmits to be done
1049 * @close_when_complete: is cm_node to be removed
1050 *
1051 * note - cm_node needs to be protected before calling this. Encase in:
1052 * i40iw_rem_ref_cm_node(cm_core, cm_node);
1053 * i40iw_schedule_cm_timer(...)
1054 * atomic_inc(&cm_node->ref_count);
1055 */
1056int i40iw_schedule_cm_timer(struct i40iw_cm_node *cm_node,
1057 struct i40iw_puda_buf *sqbuf,
1058 enum i40iw_timer_type type,
1059 int send_retrans,
1060 int close_when_complete)
1061{
d6f7bbcc 1062 struct i40iw_sc_vsi *vsi = &cm_node->iwdev->vsi;
f27b4746
FL		 1063 struct i40iw_cm_core *cm_core = cm_node->cm_core;
1064 struct i40iw_timer_entry *new_send;
1065 int ret = 0;
1066 u32 was_timer_set;
1067 unsigned long flags;
1068
1069 new_send = kzalloc(sizeof(*new_send), GFP_ATOMIC);
1070 if (!new_send) {
d6f7bbcc 1071 i40iw_free_sqbuf(vsi, (void *)sqbuf);
f27b4746
FL		 1072 return -ENOMEM;
1073 }
1074 new_send->retrycount = I40IW_DEFAULT_RETRYS;
1075 new_send->retranscount = I40IW_DEFAULT_RETRANS;
1076 new_send->sqbuf = sqbuf;
1077 new_send->timetosend = jiffies;
1078 new_send->type = type;
1079 new_send->send_retrans = send_retrans;
1080 new_send->close_when_complete = close_when_complete;
1081
1082 if (type == I40IW_TIMER_TYPE_CLOSE) {
1083 new_send->timetosend += (HZ / 10);
1084 if (cm_node->close_entry) {
1085 kfree(new_send);
d6f7bbcc 1086 i40iw_free_sqbuf(vsi, (void *)sqbuf);
f27b4746
FL		 1087 i40iw_pr_err("already close entry\n");
1088 return -EINVAL;
1089 }
1090 cm_node->close_entry = new_send;
1091 }
1092
1093 if (type == I40IW_TIMER_TYPE_SEND) {
1094 spin_lock_irqsave(&cm_node->retrans_list_lock, flags);
1095 cm_node->send_entry = new_send;
1096 atomic_inc(&cm_node->ref_count);
1097 spin_unlock_irqrestore(&cm_node->retrans_list_lock, flags);
1098 new_send->timetosend = jiffies + I40IW_RETRY_TIMEOUT;
1099
1100 atomic_inc(&sqbuf->refcount);
d6f7bbcc 1101 i40iw_puda_send_buf(vsi->ilq, sqbuf);
f27b4746
FL		 1102 if (!send_retrans) {
1103 i40iw_cleanup_retrans_entry(cm_node);
1104 if (close_when_complete)
1105 i40iw_rem_ref_cm_node(cm_node);
1106 return ret;
1107 }
1108 }
1109
1110 spin_lock_irqsave(&cm_core->ht_lock, flags);
1111 was_timer_set = timer_pending(&cm_core->tcp_timer);
1112
1113 if (!was_timer_set) {
1114 cm_core->tcp_timer.expires = new_send->timetosend;
1115 add_timer(&cm_core->tcp_timer);
1116 }
1117 spin_unlock_irqrestore(&cm_core->ht_lock, flags);
1118
1119 return ret;
1120}
1121
1122/**
1123 * i40iw_retrans_expired - Could not rexmit the packet
1124 * @cm_node: connection's node
1125 */
1126static void i40iw_retrans_expired(struct i40iw_cm_node *cm_node)
1127{
1128 struct iw_cm_id *cm_id = cm_node->cm_id;
1129 enum i40iw_cm_node_state state = cm_node->state;
1130
1131 cm_node->state = I40IW_CM_STATE_CLOSED;
1132 switch (state) {
1133 case I40IW_CM_STATE_SYN_RCVD:
1134 case I40IW_CM_STATE_CLOSING:
1135 i40iw_rem_ref_cm_node(cm_node);
1136 break;
1137 case I40IW_CM_STATE_FIN_WAIT1:
1138 case I40IW_CM_STATE_LAST_ACK:
1139 if (cm_node->cm_id)
1140 cm_id->rem_ref(cm_id);
1141 i40iw_send_reset(cm_node);
1142 break;
1143 default:
1144 atomic_inc(&cm_node->ref_count);
1145 i40iw_send_reset(cm_node);
1146 i40iw_create_event(cm_node, I40IW_CM_EVENT_ABORTED);
1147 break;
1148 }
1149}
1150
1151/**
1152 * i40iw_handle_close_entry - for handling retry/timeouts
1153 * @cm_node: connection's node
1154 * @rem_node: flag for remove cm_node
1155 */
1156static void i40iw_handle_close_entry(struct i40iw_cm_node *cm_node, u32 rem_node)
1157{
1158 struct i40iw_timer_entry *close_entry = cm_node->close_entry;
1159 struct iw_cm_id *cm_id = cm_node->cm_id;
1160 struct i40iw_qp *iwqp;
1161 unsigned long flags;
1162
1163 if (!close_entry)
1164 return;
1165 iwqp = (struct i40iw_qp *)close_entry->sqbuf;
1166 if (iwqp) {
1167 spin_lock_irqsave(&iwqp->lock, flags);
1168 if (iwqp->cm_id) {
1169 iwqp->hw_tcp_state = I40IW_TCP_STATE_CLOSED;
1170 iwqp->hw_iwarp_state = I40IW_QP_STATE_ERROR;
1171 iwqp->last_aeq = I40IW_AE_RESET_SENT;
1172 iwqp->ibqp_state = IB_QPS_ERR;
1173 spin_unlock_irqrestore(&iwqp->lock, flags);
1174 i40iw_cm_disconn(iwqp);
1175 } else {
1176 spin_unlock_irqrestore(&iwqp->lock, flags);
1177 }
1178 } else if (rem_node) {
1179 /* TIME_WAIT state */
1180 i40iw_rem_ref_cm_node(cm_node);
1181 }
1182 if (cm_id)
1183 cm_id->rem_ref(cm_id);
1184 kfree(close_entry);
1185 cm_node->close_entry = NULL;
1186}
1187
1188/**
1189 * i40iw_cm_timer_tick - system's timer expired callback
1190 * @pass: Pointing to cm_core
1191 */
1192static void i40iw_cm_timer_tick(unsigned long pass)
1193{
1194 unsigned long nexttimeout = jiffies + I40IW_LONG_TIME;
1195 struct i40iw_cm_node *cm_node;
1196 struct i40iw_timer_entry *send_entry, *close_entry;
1197 struct list_head *list_core_temp;
d6f7bbcc 1198 struct i40iw_sc_vsi *vsi;
f27b4746
FL		 1199 struct list_head *list_node;
1200 struct i40iw_cm_core *cm_core = (struct i40iw_cm_core *)pass;
1201 u32 settimer = 0;
1202 unsigned long timetosend;
1203 struct i40iw_sc_dev *dev;
1204 unsigned long flags;
1205
1206 struct list_head timer_list;
1207
1208 INIT_LIST_HEAD(&timer_list);
1209 spin_lock_irqsave(&cm_core->ht_lock, flags);
1210
1211 list_for_each_safe(list_node, list_core_temp, &cm_core->connected_nodes) {
1212 cm_node = container_of(list_node, struct i40iw_cm_node, list);
1213 if (cm_node->close_entry || cm_node->send_entry) {
1214 atomic_inc(&cm_node->ref_count);
1215 list_add(&cm_node->timer_entry, &timer_list);
1216 }
1217 }
1218 spin_unlock_irqrestore(&cm_core->ht_lock, flags);
1219
1220 list_for_each_safe(list_node, list_core_temp, &timer_list) {
1221 cm_node = container_of(list_node,
1222 struct i40iw_cm_node,
1223 timer_entry);
1224 close_entry = cm_node->close_entry;
1225
1226 if (close_entry) {
1227 if (time_after(close_entry->timetosend, jiffies)) {
1228 if (nexttimeout > close_entry->timetosend ||
1229 !settimer) {
1230 nexttimeout = close_entry->timetosend;
1231 settimer = 1;
1232 }
1233 } else {
1234 i40iw_handle_close_entry(cm_node, 1);
1235 }
1236 }
1237
1238 spin_lock_irqsave(&cm_node->retrans_list_lock, flags);
1239
1240 send_entry = cm_node->send_entry;
1241 if (!send_entry)
1242 goto done;
1243 if (time_after(send_entry->timetosend, jiffies)) {
1244 if (cm_node->state != I40IW_CM_STATE_OFFLOADED) {
1245 if ((nexttimeout > send_entry->timetosend) ||
1246 !settimer) {
1247 nexttimeout = send_entry->timetosend;
1248 settimer = 1;
1249 }
1250 } else {
1251 i40iw_free_retrans_entry(cm_node);
1252 }
1253 goto done;
1254 }
1255
1256 if ((cm_node->state == I40IW_CM_STATE_OFFLOADED) ||
1257 (cm_node->state == I40IW_CM_STATE_CLOSED)) {
1258 i40iw_free_retrans_entry(cm_node);
1259 goto done;
1260 }
1261
1262 if (!send_entry->retranscount || !send_entry->retrycount) {
1263 i40iw_free_retrans_entry(cm_node);
1264
1265 spin_unlock_irqrestore(&cm_node->retrans_list_lock, flags);
1266 i40iw_retrans_expired(cm_node);
1267 cm_node->state = I40IW_CM_STATE_CLOSED;
1268 spin_lock_irqsave(&cm_node->retrans_list_lock, flags);
1269 goto done;
1270 }
1271 cm_node->cm_core->stats_pkt_retrans++;
1272 spin_unlock_irqrestore(&cm_node->retrans_list_lock, flags);
1273
d6f7bbcc 1274 vsi = &cm_node->iwdev->vsi;
f27b4746
FL		 1275 dev = cm_node->dev;
1276 atomic_inc(&send_entry->sqbuf->refcount);
d6f7bbcc 1277 i40iw_puda_send_buf(vsi->ilq, send_entry->sqbuf);
f27b4746
FL		 1278 spin_lock_irqsave(&cm_node->retrans_list_lock, flags);
1279 if (send_entry->send_retrans) {
1280 send_entry->retranscount--;
1281 timetosend = (I40IW_RETRY_TIMEOUT <<
1282 (I40IW_DEFAULT_RETRANS -
1283 send_entry->retranscount));
1284
1285 send_entry->timetosend = jiffies +
1286 min(timetosend, I40IW_MAX_TIMEOUT);
1287 if (nexttimeout > send_entry->timetosend || !settimer) {
1288 nexttimeout = send_entry->timetosend;
1289 settimer = 1;
1290 }
1291 } else {
1292 int close_when_complete;
1293
1294 close_when_complete = send_entry->close_when_complete;
1295 i40iw_debug(cm_node->dev,
1296 I40IW_DEBUG_CM,
1297 "cm_node=%p state=%d\n",
1298 cm_node,
1299 cm_node->state);
1300 i40iw_free_retrans_entry(cm_node);
1301 if (close_when_complete)
1302 i40iw_rem_ref_cm_node(cm_node);
1303 }
1304done:
1305 spin_unlock_irqrestore(&cm_node->retrans_list_lock, flags);
1306 i40iw_rem_ref_cm_node(cm_node);
1307 }
1308
1309 if (settimer) {
1310 spin_lock_irqsave(&cm_core->ht_lock, flags);
1311 if (!timer_pending(&cm_core->tcp_timer)) {
1312 cm_core->tcp_timer.expires = nexttimeout;
1313 add_timer(&cm_core->tcp_timer);
1314 }
1315 spin_unlock_irqrestore(&cm_core->ht_lock, flags);
1316 }
1317}
1318
1319/**
1320 * i40iw_send_syn - send SYN packet
1321 * @cm_node: connection's node
1322 * @sendack: flag to set ACK bit or not
1323 */
1324int i40iw_send_syn(struct i40iw_cm_node *cm_node, u32 sendack)
1325{
1326 struct i40iw_puda_buf *sqbuf;
1327 int flags = SET_SYN;
1328 char optionsbuffer[sizeof(struct option_mss) +
1329 sizeof(struct option_windowscale) +
1330 sizeof(struct option_base) + TCP_OPTIONS_PADDING];
1331 struct i40iw_kmem_info opts;
1332
1333 int optionssize = 0;
1334 /* Sending MSS option */
1335 union all_known_options *options;
1336
1337 opts.addr = optionsbuffer;
1338 if (!cm_node) {
1339 i40iw_pr_err("no cm_node\n");
1340 return -EINVAL;
1341 }
1342
1343 options = (union all_known_options *)&optionsbuffer[optionssize];
1344 options->as_mss.optionnum = OPTION_NUMBER_MSS;
1345 options->as_mss.length = sizeof(struct option_mss);
1346 options->as_mss.mss = htons(cm_node->tcp_cntxt.mss);
1347 optionssize += sizeof(struct option_mss);
1348
1349 options = (union all_known_options *)&optionsbuffer[optionssize];
1350 options->as_windowscale.optionnum = OPTION_NUMBER_WINDOW_SCALE;
1351 options->as_windowscale.length = sizeof(struct option_windowscale);
1352 options->as_windowscale.shiftcount = cm_node->tcp_cntxt.rcv_wscale;
1353 optionssize += sizeof(struct option_windowscale);
1354 options = (union all_known_options *)&optionsbuffer[optionssize];
1355 options->as_end = OPTION_NUMBER_END;
1356 optionssize += 1;
1357
1358 if (sendack)
1359 flags |= SET_ACK;
1360
1361 opts.size = optionssize;
1362
1363 sqbuf = i40iw_form_cm_frame(cm_node, &opts, NULL, NULL, flags);
1364 if (!sqbuf) {
1365 i40iw_pr_err("no sqbuf\n");
1366 return -1;
1367 }
1368 return i40iw_schedule_cm_timer(cm_node, sqbuf, I40IW_TIMER_TYPE_SEND, 1, 0);
1369}
1370
1371/**
1372 * i40iw_send_ack - Send ACK packet
1373 * @cm_node: connection's node
1374 */
1375static void i40iw_send_ack(struct i40iw_cm_node *cm_node)
1376{
1377 struct i40iw_puda_buf *sqbuf;
d6f7bbcc 1378 struct i40iw_sc_vsi *vsi = &cm_node->iwdev->vsi;
f27b4746
FL		 1379
1380 sqbuf = i40iw_form_cm_frame(cm_node, NULL, NULL, NULL, SET_ACK);
1381 if (sqbuf)
d6f7bbcc 1382 i40iw_puda_send_buf(vsi->ilq, sqbuf);
f27b4746
FL		 1383 else
1384 i40iw_pr_err("no sqbuf\n");
1385}
1386
1387/**
1388 * i40iw_send_fin - Send FIN pkt
1389 * @cm_node: connection's node
1390 */
1391static int i40iw_send_fin(struct i40iw_cm_node *cm_node)
1392{
1393 struct i40iw_puda_buf *sqbuf;
1394
1395 sqbuf = i40iw_form_cm_frame(cm_node, NULL, NULL, NULL, SET_ACK | SET_FIN);
1396 if (!sqbuf) {
1397 i40iw_pr_err("no sqbuf\n");
1398 return -1;
1399 }
1400 return i40iw_schedule_cm_timer(cm_node, sqbuf, I40IW_TIMER_TYPE_SEND, 1, 0);
1401}
1402
1403/**
1404 * i40iw_find_node - find a cm node that matches the reference cm node
1405 * @cm_core: cm's core
1406 * @rem_port: remote tcp port num
1407 * @rem_addr: remote ip addr
1408 * @loc_port: local tcp port num
1409 * @loc_addr: loc ip addr
1410 * @add_refcnt: flag to increment refcount of cm_node
1411 */
1412struct i40iw_cm_node *i40iw_find_node(struct i40iw_cm_core *cm_core,
1413 u16 rem_port,
1414 u32 *rem_addr,
1415 u16 loc_port,
1416 u32 *loc_addr,
1417 bool add_refcnt)
1418{
1419 struct list_head *hte;
1420 struct i40iw_cm_node *cm_node;
1421 unsigned long flags;
1422
1423 hte = &cm_core->connected_nodes;
1424
1425 /* walk list and find cm_node associated with this session ID */
1426 spin_lock_irqsave(&cm_core->ht_lock, flags);
1427 list_for_each_entry(cm_node, hte, list) {
8d8cd0bf
FL		 1428 if (!memcmp(cm_node->loc_addr, loc_addr, sizeof(cm_node->loc_addr)) &&
1429 (cm_node->loc_port == loc_port) &&
1430 !memcmp(cm_node->rem_addr, rem_addr, sizeof(cm_node->rem_addr)) &&
1431 (cm_node->rem_port == rem_port)) {
f27b4746
FL		 1432 if (add_refcnt)
1433 atomic_inc(&cm_node->ref_count);
1434 spin_unlock_irqrestore(&cm_core->ht_lock, flags);
1435 return cm_node;
1436 }
1437 }
1438 spin_unlock_irqrestore(&cm_core->ht_lock, flags);
1439
1440 /* no owner node */
1441 return NULL;
1442}
1443
1444/**
1445 * i40iw_find_listener - find a cm node listening on this addr-port pair
1446 * @cm_core: cm's core
1447 * @dst_port: listener tcp port num
1448 * @dst_addr: listener ip addr
1449 * @listener_state: state to match with listen node's
1450 */
1451static struct i40iw_cm_listener *i40iw_find_listener(
1452 struct i40iw_cm_core *cm_core,
1453 u32 *dst_addr,
1454 u16 dst_port,
1455 u16 vlan_id,
1456 enum i40iw_cm_listener_state
8d8cd0bf 1457 listener_state)
f27b4746
FL		 1458{
1459 struct i40iw_cm_listener *listen_node;
1460 static const u32 ip_zero[4] = { 0, 0, 0, 0 };
1461 u32 listen_addr[4];
1462 u16 listen_port;
1463 unsigned long flags;
1464
1465 /* walk list and find cm_node associated with this session ID */
1466 spin_lock_irqsave(&cm_core->listen_list_lock, flags);
1467 list_for_each_entry(listen_node, &cm_core->listen_nodes, list) {
8d8cd0bf
FL		 1468 memcpy(listen_addr, listen_node->loc_addr, sizeof(listen_addr));
1469 listen_port = listen_node->loc_port;
f27b4746
FL		 1470 /* compare node pair, return node handle if a match */
1471 if ((!memcmp(listen_addr, dst_addr, sizeof(listen_addr)) ||
1472 !memcmp(listen_addr, ip_zero, sizeof(listen_addr))) &&
1473 (listen_port == dst_port) &&
1474 (listener_state & listen_node->listener_state)) {
1475 atomic_inc(&listen_node->ref_count);
1476 spin_unlock_irqrestore(&cm_core->listen_list_lock, flags);
1477 return listen_node;
1478 }
1479 }
1480 spin_unlock_irqrestore(&cm_core->listen_list_lock, flags);
1481 return NULL;
1482}
1483
1484/**
1485 * i40iw_add_hte_node - add a cm node to the hash table
1486 * @cm_core: cm's core
1487 * @cm_node: connection's node
1488 */
1489static void i40iw_add_hte_node(struct i40iw_cm_core *cm_core,
1490 struct i40iw_cm_node *cm_node)
1491{
1492 struct list_head *hte;
1493 unsigned long flags;
1494
1495 if (!cm_node || !cm_core) {
1496 i40iw_pr_err("cm_node or cm_core == NULL\n");
1497 return;
1498 }
1499 spin_lock_irqsave(&cm_core->ht_lock, flags);
1500
1501 /* get a handle on the hash table element (list head for this slot) */
1502 hte = &cm_core->connected_nodes;
1503 list_add_tail(&cm_node->list, hte);
1504 spin_unlock_irqrestore(&cm_core->ht_lock, flags);
1505}
1506
1507/**
1508 * listen_port_in_use - determine if port is in use
1509 * @port: Listen port number
1510 */
1511static bool i40iw_listen_port_in_use(struct i40iw_cm_core *cm_core, u16 port)
1512{
1513 struct i40iw_cm_listener *listen_node;
1514 unsigned long flags;
1515 bool ret = false;
1516
1517 spin_lock_irqsave(&cm_core->listen_list_lock, flags);
1518 list_for_each_entry(listen_node, &cm_core->listen_nodes, list) {
8d8cd0bf 1519 if (listen_node->loc_port == port) {
f27b4746
FL		 1520 ret = true;
1521 break;
1522 }
1523 }
1524 spin_unlock_irqrestore(&cm_core->listen_list_lock, flags);
1525 return ret;
1526}
1527
1528/**
1529 * i40iw_del_multiple_qhash - Remove qhash and child listens
1530 * @iwdev: iWarp device
1531 * @cm_info: CM info for parent listen node
1532 * @cm_parent_listen_node: The parent listen node
1533 */
1534static enum i40iw_status_code i40iw_del_multiple_qhash(
1535 struct i40iw_device *iwdev,
1536 struct i40iw_cm_info *cm_info,
1537 struct i40iw_cm_listener *cm_parent_listen_node)
1538{
1539 struct i40iw_cm_listener *child_listen_node;
1540 enum i40iw_status_code ret = I40IW_ERR_CONFIG;
1541 struct list_head *pos, *tpos;
1542 unsigned long flags;
1543
1544 spin_lock_irqsave(&iwdev->cm_core.listen_list_lock, flags);
1545 list_for_each_safe(pos, tpos, &cm_parent_listen_node->child_listen_list) {
1546 child_listen_node = list_entry(pos, struct i40iw_cm_listener, child_listen_list);
1547 if (child_listen_node->ipv4)
1548 i40iw_debug(&iwdev->sc_dev,
1549 I40IW_DEBUG_CM,
1550 "removing child listen for IP=%pI4, port=%d, vlan=%d\n",
1551 child_listen_node->loc_addr,
1552 child_listen_node->loc_port,
1553 child_listen_node->vlan_id);
1554 else
1555 i40iw_debug(&iwdev->sc_dev, I40IW_DEBUG_CM,
1556 "removing child listen for IP=%pI6, port=%d, vlan=%d\n",
1557 child_listen_node->loc_addr,
1558 child_listen_node->loc_port,
1559 child_listen_node->vlan_id);
1560 list_del(pos);
f27b4746
FL		 1561 memcpy(cm_info->loc_addr, child_listen_node->loc_addr,
1562 sizeof(cm_info->loc_addr));
1563 cm_info->vlan_id = child_listen_node->vlan_id;
e5e74b61
MI		 1564 if (child_listen_node->qhash_set) {
1565 ret = i40iw_manage_qhash(iwdev, cm_info,
1566 I40IW_QHASH_TYPE_TCP_SYN,
1567 I40IW_QHASH_MANAGE_TYPE_DELETE,
1568 NULL, false);
1569 child_listen_node->qhash_set = false;
1570 } else {
1571 ret = I40IW_SUCCESS;
1572 }
f27b4746
FL		 1573 i40iw_debug(&iwdev->sc_dev,
1574 I40IW_DEBUG_CM,
1575 "freed pointer = %p\n",
1576 child_listen_node);
5ec11ed2
MI		 1577 kfree(child_listen_node);
1578 cm_parent_listen_node->cm_core->stats_listen_nodes_destroyed++;
f27b4746
FL		 1579 }
1580 spin_unlock_irqrestore(&iwdev->cm_core.listen_list_lock, flags);
1581
1582 return ret;
1583}
1584
1585/**
1586 * i40iw_netdev_vlan_ipv6 - Gets the netdev and mac
1587 * @addr: local IPv6 address
1588 * @vlan_id: vlan id for the given IPv6 address
1589 * @mac: mac address for the given IPv6 address
1590 *
1591 * Returns the net_device of the IPv6 address and also sets the
1592 * vlan id and mac for that address.
1593 */
1594static struct net_device *i40iw_netdev_vlan_ipv6(u32 *addr, u16 *vlan_id, u8 *mac)
1595{
1596 struct net_device *ip_dev = NULL;
f27b4746
FL		 1597 struct in6_addr laddr6;
1598
5ebcb0ff
HO		 1599 if (!IS_ENABLED(CONFIG_IPV6))
1600 return NULL;
f27b4746
FL		 1601 i40iw_copy_ip_htonl(laddr6.in6_u.u6_addr32, addr);
1602 if (vlan_id)
1603 *vlan_id = I40IW_NO_VLAN;
1604 if (mac)
1605 eth_zero_addr(mac);
1606 rcu_read_lock();
1607 for_each_netdev_rcu(&init_net, ip_dev) {
1608 if (ipv6_chk_addr(&init_net, &laddr6, ip_dev, 1)) {
1609 if (vlan_id)
1610 *vlan_id = rdma_vlan_dev_vlan_id(ip_dev);
1611 if (ip_dev->dev_addr && mac)
1612 ether_addr_copy(mac, ip_dev->dev_addr);
1613 break;
1614 }
1615 }
1616 rcu_read_unlock();
f27b4746
FL		 1617 return ip_dev;
1618}
1619
1620/**
1621 * i40iw_get_vlan_ipv4 - Returns the vlan_id for IPv4 address
1622 * @addr: local IPv4 address
1623 */
1624static u16 i40iw_get_vlan_ipv4(u32 *addr)
1625{
1626 struct net_device *netdev;
1627 u16 vlan_id = I40IW_NO_VLAN;
1628
1629 netdev = ip_dev_find(&init_net, htonl(addr[0]));
1630 if (netdev) {
1631 vlan_id = rdma_vlan_dev_vlan_id(netdev);
1632 dev_put(netdev);
1633 }
1634 return vlan_id;
1635}
1636
1637/**
1638 * i40iw_add_mqh_6 - Adds multiple qhashes for IPv6
1639 * @iwdev: iWarp device
1640 * @cm_info: CM info for parent listen node
1641 * @cm_parent_listen_node: The parent listen node
1642 *
1643 * Adds a qhash and a child listen node for every IPv6 address
1644 * on the adapter and adds the associated qhash filter
1645 */
1646static enum i40iw_status_code i40iw_add_mqh_6(struct i40iw_device *iwdev,
1647 struct i40iw_cm_info *cm_info,
1648 struct i40iw_cm_listener *cm_parent_listen_node)
1649{
1650 struct net_device *ip_dev;
1651 struct inet6_dev *idev;
a05e1513 1652 struct inet6_ifaddr *ifp, *tmp;
f27b4746
FL		 1653 enum i40iw_status_code ret = 0;
1654 struct i40iw_cm_listener *child_listen_node;
1655 unsigned long flags;
1656
1657 rtnl_lock();
1658 for_each_netdev_rcu(&init_net, ip_dev) {
1659 if ((((rdma_vlan_dev_vlan_id(ip_dev) < I40IW_NO_VLAN) &&
1660 (rdma_vlan_dev_real_dev(ip_dev) == iwdev->netdev)) ||
1661 (ip_dev == iwdev->netdev)) && (ip_dev->flags & IFF_UP)) {
1662 idev = __in6_dev_get(ip_dev);
1663 if (!idev) {
1664 i40iw_pr_err("idev == NULL\n");
1665 break;
1666 }
a05e1513 1667 list_for_each_entry_safe(ifp, tmp, &idev->addr_list, if_list) {
f27b4746
FL		 1668 i40iw_debug(&iwdev->sc_dev,
1669 I40IW_DEBUG_CM,
1670 "IP=%pI6, vlan_id=%d, MAC=%pM\n",
1671 &ifp->addr,
1672 rdma_vlan_dev_vlan_id(ip_dev),
1673 ip_dev->dev_addr);
1674 child_listen_node =
1675 kzalloc(sizeof(*child_listen_node), GFP_ATOMIC);
1676 i40iw_debug(&iwdev->sc_dev,
1677 I40IW_DEBUG_CM,
1678 "Allocating child listener %p\n",
1679 child_listen_node);
1680 if (!child_listen_node) {
f27b4746
FL		 1681 ret = I40IW_ERR_NO_MEMORY;
1682 goto exit;
1683 }
1684 cm_info->vlan_id = rdma_vlan_dev_vlan_id(ip_dev);
1685 cm_parent_listen_node->vlan_id = cm_info->vlan_id;
1686
1687 memcpy(child_listen_node, cm_parent_listen_node,
1688 sizeof(*child_listen_node));
1689
1690 i40iw_copy_ip_ntohl(child_listen_node->loc_addr,
1691 ifp->addr.in6_u.u6_addr32);
f27b4746
FL		 1692 memcpy(cm_info->loc_addr, child_listen_node->loc_addr,
1693 sizeof(cm_info->loc_addr));
1694
1695 ret = i40iw_manage_qhash(iwdev, cm_info,
1696 I40IW_QHASH_TYPE_TCP_SYN,
1697 I40IW_QHASH_MANAGE_TYPE_ADD,
1698 NULL, true);
1699 if (!ret) {
e5e74b61 1700 child_listen_node->qhash_set = true;
f27b4746
FL		 1701 spin_lock_irqsave(&iwdev->cm_core.listen_list_lock, flags);
1702 list_add(&child_listen_node->child_listen_list,
1703 &cm_parent_listen_node->child_listen_list);
1704 spin_unlock_irqrestore(&iwdev->cm_core.listen_list_lock, flags);
1705 cm_parent_listen_node->cm_core->stats_listen_nodes_created++;
1706 } else {
1707 kfree(child_listen_node);
1708 }
1709 }
1710 }
1711 }
1712exit:
1713 rtnl_unlock();
1714 return ret;
1715}
1716
1717/**
1718 * i40iw_add_mqh_4 - Adds multiple qhashes for IPv4
1719 * @iwdev: iWarp device
1720 * @cm_info: CM info for parent listen node
1721 * @cm_parent_listen_node: The parent listen node
1722 *
1723 * Adds a qhash and a child listen node for every IPv4 address
1724 * on the adapter and adds the associated qhash filter
1725 */
1726static enum i40iw_status_code i40iw_add_mqh_4(
1727 struct i40iw_device *iwdev,
1728 struct i40iw_cm_info *cm_info,
1729 struct i40iw_cm_listener *cm_parent_listen_node)
1730{
1731 struct net_device *dev;
1732 struct in_device *idev;
1733 struct i40iw_cm_listener *child_listen_node;
1734 enum i40iw_status_code ret = 0;
1735 unsigned long flags;
1736
1737 rtnl_lock();
1738 for_each_netdev(&init_net, dev) {
1739 if ((((rdma_vlan_dev_vlan_id(dev) < I40IW_NO_VLAN) &&
1740 (rdma_vlan_dev_real_dev(dev) == iwdev->netdev)) ||
1741 (dev == iwdev->netdev)) && (dev->flags & IFF_UP)) {
1742 idev = in_dev_get(dev);
1743 for_ifa(idev) {
1744 i40iw_debug(&iwdev->sc_dev,
1745 I40IW_DEBUG_CM,
1746 "Allocating child CM Listener forIP=%pI4, vlan_id=%d, MAC=%pM\n",
1747 &ifa->ifa_address,
1748 rdma_vlan_dev_vlan_id(dev),
1749 dev->dev_addr);
1750 child_listen_node = kzalloc(sizeof(*child_listen_node), GFP_ATOMIC);
1751 cm_parent_listen_node->cm_core->stats_listen_nodes_created++;
1752 i40iw_debug(&iwdev->sc_dev,
1753 I40IW_DEBUG_CM,
1754 "Allocating child listener %p\n",
1755 child_listen_node);
1756 if (!child_listen_node) {
f27b4746
FL		 1757 in_dev_put(idev);
1758 ret = I40IW_ERR_NO_MEMORY;
1759 goto exit;
1760 }
1761 cm_info->vlan_id = rdma_vlan_dev_vlan_id(dev);
1762 cm_parent_listen_node->vlan_id = cm_info->vlan_id;
1763 memcpy(child_listen_node,
1764 cm_parent_listen_node,
1765 sizeof(*child_listen_node));
1766
1767 child_listen_node->loc_addr[0] = ntohl(ifa->ifa_address);
f27b4746
FL		 1768 memcpy(cm_info->loc_addr, child_listen_node->loc_addr,
1769 sizeof(cm_info->loc_addr));
1770
1771 ret = i40iw_manage_qhash(iwdev,
1772 cm_info,
1773 I40IW_QHASH_TYPE_TCP_SYN,
1774 I40IW_QHASH_MANAGE_TYPE_ADD,
1775 NULL,
1776 true);
1777 if (!ret) {
e5e74b61 1778 child_listen_node->qhash_set = true;
f27b4746
FL		 1779 spin_lock_irqsave(&iwdev->cm_core.listen_list_lock, flags);
1780 list_add(&child_listen_node->child_listen_list,
1781 &cm_parent_listen_node->child_listen_list);
1782 spin_unlock_irqrestore(&iwdev->cm_core.listen_list_lock, flags);
1783 } else {
1784 kfree(child_listen_node);
1785 cm_parent_listen_node->cm_core->stats_listen_nodes_created--;
1786 }
1787 }
1788 endfor_ifa(idev);
1789 in_dev_put(idev);
1790 }
1791 }
1792exit:
1793 rtnl_unlock();
1794 return ret;
1795}
1796
1797/**
1798 * i40iw_dec_refcnt_listen - delete listener and associated cm nodes
1799 * @cm_core: cm's core
1800 * @free_hanging_nodes: to free associated cm_nodes
1801 * @apbvt_del: flag to delete the apbvt
1802 */
1803static int i40iw_dec_refcnt_listen(struct i40iw_cm_core *cm_core,
1804 struct i40iw_cm_listener *listener,
1805 int free_hanging_nodes, bool apbvt_del)
1806{
1807 int ret = -EINVAL;
1808 int err = 0;
1809 struct list_head *list_pos;
1810 struct list_head *list_temp;
1811 struct i40iw_cm_node *cm_node;
1812 struct list_head reset_list;
1813 struct i40iw_cm_info nfo;
1814 struct i40iw_cm_node *loopback;
1815 enum i40iw_cm_node_state old_state;
1816 unsigned long flags;
1817
1818 /* free non-accelerated child nodes for this listener */
1819 INIT_LIST_HEAD(&reset_list);
1820 if (free_hanging_nodes) {
1821 spin_lock_irqsave(&cm_core->ht_lock, flags);
1822 list_for_each_safe(list_pos, list_temp, &cm_core->connected_nodes) {
1823 cm_node = container_of(list_pos, struct i40iw_cm_node, list);
1824 if ((cm_node->listener == listener) && !cm_node->accelerated) {
1825 atomic_inc(&cm_node->ref_count);
1826 list_add(&cm_node->reset_entry, &reset_list);
1827 }
1828 }
1829 spin_unlock_irqrestore(&cm_core->ht_lock, flags);
1830 }
1831
1832 list_for_each_safe(list_pos, list_temp, &reset_list) {
1833 cm_node = container_of(list_pos, struct i40iw_cm_node, reset_entry);
1834 loopback = cm_node->loopbackpartner;
1835 if (cm_node->state >= I40IW_CM_STATE_FIN_WAIT1) {
1836 i40iw_rem_ref_cm_node(cm_node);
1837 } else {
1838 if (!loopback) {
1839 i40iw_cleanup_retrans_entry(cm_node);
1840 err = i40iw_send_reset(cm_node);
1841 if (err) {
1842 cm_node->state = I40IW_CM_STATE_CLOSED;
1843 i40iw_pr_err("send reset\n");
1844 } else {
1845 old_state = cm_node->state;
1846 cm_node->state = I40IW_CM_STATE_LISTENER_DESTROYED;
1847 if (old_state != I40IW_CM_STATE_MPAREQ_RCVD)
1848 i40iw_rem_ref_cm_node(cm_node);
1849 }
1850 } else {
1851 struct i40iw_cm_event event;
1852
1853 event.cm_node = loopback;
1854 memcpy(event.cm_info.rem_addr,
1855 loopback->rem_addr, sizeof(event.cm_info.rem_addr));
1856 memcpy(event.cm_info.loc_addr,
1857 loopback->loc_addr, sizeof(event.cm_info.loc_addr));
1858 event.cm_info.rem_port = loopback->rem_port;
1859 event.cm_info.loc_port = loopback->loc_port;
1860 event.cm_info.cm_id = loopback->cm_id;
1861 event.cm_info.ipv4 = loopback->ipv4;
1862 atomic_inc(&loopback->ref_count);
1863 loopback->state = I40IW_CM_STATE_CLOSED;
1864 i40iw_event_connect_error(&event);
1865 cm_node->state = I40IW_CM_STATE_LISTENER_DESTROYED;
1866 i40iw_rem_ref_cm_node(cm_node);
1867 }
1868 }
1869 }
1870
1871 if (!atomic_dec_return(&listener->ref_count)) {
1872 spin_lock_irqsave(&cm_core->listen_list_lock, flags);
1873 list_del(&listener->list);
1874 spin_unlock_irqrestore(&cm_core->listen_list_lock, flags);
1875
1876 if (listener->iwdev) {
8d8cd0bf 1877 if (apbvt_del && !i40iw_listen_port_in_use(cm_core, listener->loc_port))
f27b4746 1878 i40iw_manage_apbvt(listener->iwdev,
8d8cd0bf 1879 listener->loc_port,
f27b4746
FL		 1880 I40IW_MANAGE_APBVT_DEL);
1881
1882 memcpy(nfo.loc_addr, listener->loc_addr, sizeof(nfo.loc_addr));
f27b4746 1883 nfo.loc_port = listener->loc_port;
f27b4746
FL		 1884 nfo.ipv4 = listener->ipv4;
1885 nfo.vlan_id = listener->vlan_id;
0fc2dc58 1886 nfo.user_pri = listener->user_pri;
f27b4746 1887
f27b4746
FL		 1888 if (!list_empty(&listener->child_listen_list)) {
1889 i40iw_del_multiple_qhash(listener->iwdev, &nfo, listener);
1890 } else {
1891 if (listener->qhash_set)
1892 i40iw_manage_qhash(listener->iwdev,
1893 &nfo,
1894 I40IW_QHASH_TYPE_TCP_SYN,
1895 I40IW_QHASH_MANAGE_TYPE_DELETE,
1896 NULL,
1897 false);
1898 }
1899 }
1900
1901 cm_core->stats_listen_destroyed++;
1902 kfree(listener);
1903 cm_core->stats_listen_nodes_destroyed++;
1904 listener = NULL;
1905 ret = 0;
1906 }
1907
1908 if (listener) {
1909 if (atomic_read(&listener->pend_accepts_cnt) > 0)
1910 i40iw_debug(cm_core->dev,
1911 I40IW_DEBUG_CM,
1912 "%s: listener (%p) pending accepts=%u\n",
1913 __func__,
1914 listener,
1915 atomic_read(&listener->pend_accepts_cnt));
1916 }
1917
1918 return ret;
1919}
1920
1921/**
1922 * i40iw_cm_del_listen - delete a linstener
1923 * @cm_core: cm's core
1924 * @listener: passive connection's listener
1925 * @apbvt_del: flag to delete apbvt
1926 */
1927static int i40iw_cm_del_listen(struct i40iw_cm_core *cm_core,
1928 struct i40iw_cm_listener *listener,
1929 bool apbvt_del)
1930{
1931 listener->listener_state = I40IW_CM_LISTENER_PASSIVE_STATE;
1932 listener->cm_id = NULL; /* going to be destroyed pretty soon */
1933 return i40iw_dec_refcnt_listen(cm_core, listener, 1, apbvt_del);
1934}
1935
1936/**
1937 * i40iw_addr_resolve_neigh - resolve neighbor address
1938 * @iwdev: iwarp device structure
1939 * @src_ip: local ip address
1940 * @dst_ip: remote ip address
1941 * @arpindex: if there is an arp entry
1942 */
1943static int i40iw_addr_resolve_neigh(struct i40iw_device *iwdev,
1944 u32 src_ip,
1945 u32 dst_ip,
1946 int arpindex)
1947{
1948 struct rtable *rt;
1949 struct neighbour *neigh;
1950 int rc = arpindex;
1951 struct net_device *netdev = iwdev->netdev;
1952 __be32 dst_ipaddr = htonl(dst_ip);
1953 __be32 src_ipaddr = htonl(src_ip);
1954
1955 rt = ip_route_output(&init_net, dst_ipaddr, src_ipaddr, 0, 0);
1956 if (IS_ERR(rt)) {
1957 i40iw_pr_err("ip_route_output\n");
1958 return rc;
1959 }
1960
1961 if (netif_is_bond_slave(netdev))
1962 netdev = netdev_master_upper_dev_get(netdev);
1963
1964 neigh = dst_neigh_lookup(&rt->dst, &dst_ipaddr);
1965
1966 rcu_read_lock();
1967 if (neigh) {
1968 if (neigh->nud_state & NUD_VALID) {
1969 if (arpindex >= 0) {
1970 if (ether_addr_equal(iwdev->arp_table[arpindex].mac_addr,
1971 neigh->ha))
1972 /* Mac address same as arp table */
1973 goto resolve_neigh_exit;
1974 i40iw_manage_arp_cache(iwdev,
1975 iwdev->arp_table[arpindex].mac_addr,
1976 &dst_ip,
1977 true,
1978 I40IW_ARP_DELETE);
1979 }
1980
1981 i40iw_manage_arp_cache(iwdev, neigh->ha, &dst_ip, true, I40IW_ARP_ADD);
1982 rc = i40iw_arp_table(iwdev, &dst_ip, true, NULL, I40IW_ARP_RESOLVE);
1983 } else {
1984 neigh_event_send(neigh, NULL);
1985 }
1986 }
1987 resolve_neigh_exit:
1988
1989 rcu_read_unlock();
1990 if (neigh)
1991 neigh_release(neigh);
1992
1993 ip_rt_put(rt);
1994 return rc;
1995}
1996
1997/**
1998 * i40iw_get_dst_ipv6
1999 */
f27b4746
FL		 2000static struct dst_entry *i40iw_get_dst_ipv6(struct sockaddr_in6 *src_addr,
2001 struct sockaddr_in6 *dst_addr)
2002{
2003 struct dst_entry *dst;
2004 struct flowi6 fl6;
2005
2006 memset(&fl6, 0, sizeof(fl6));
2007 fl6.daddr = dst_addr->sin6_addr;
2008 fl6.saddr = src_addr->sin6_addr;
2009 if (ipv6_addr_type(&fl6.daddr) & IPV6_ADDR_LINKLOCAL)
2010 fl6.flowi6_oif = dst_addr->sin6_scope_id;
2011
2012 dst = ip6_route_output(&init_net, NULL, &fl6);
2013 return dst;
2014}
f27b4746
FL		 2015
2016/**
2017 * i40iw_addr_resolve_neigh_ipv6 - resolve neighbor ipv6 address
2018 * @iwdev: iwarp device structure
2019 * @dst_ip: remote ip address
2020 * @arpindex: if there is an arp entry
2021 */
f27b4746
FL		 2022static int i40iw_addr_resolve_neigh_ipv6(struct i40iw_device *iwdev,
2023 u32 *src,
2024 u32 *dest,
2025 int arpindex)
2026{
2027 struct neighbour *neigh;
2028 int rc = arpindex;
2029 struct net_device *netdev = iwdev->netdev;
2030 struct dst_entry *dst;
2031 struct sockaddr_in6 dst_addr;
2032 struct sockaddr_in6 src_addr;
2033
2034 memset(&dst_addr, 0, sizeof(dst_addr));
2035 dst_addr.sin6_family = AF_INET6;
2036 i40iw_copy_ip_htonl(dst_addr.sin6_addr.in6_u.u6_addr32, dest);
2037 memset(&src_addr, 0, sizeof(src_addr));
2038 src_addr.sin6_family = AF_INET6;
2039 i40iw_copy_ip_htonl(src_addr.sin6_addr.in6_u.u6_addr32, src);
2040 dst = i40iw_get_dst_ipv6(&src_addr, &dst_addr);
2041 if (!dst || dst->error) {
2042 if (dst) {
2043 dst_release(dst);
2044 i40iw_pr_err("ip6_route_output returned dst->error = %d\n",
2045 dst->error);
2046 }
2047 return rc;
2048 }
2049
2050 if (netif_is_bond_slave(netdev))
2051 netdev = netdev_master_upper_dev_get(netdev);
2052
2053 neigh = dst_neigh_lookup(dst, &dst_addr);
2054
2055 rcu_read_lock();
2056 if (neigh) {
2057 i40iw_debug(&iwdev->sc_dev, I40IW_DEBUG_CM, "dst_neigh_lookup MAC=%pM\n", neigh->ha);
2058 if (neigh->nud_state & NUD_VALID) {
2059 if (arpindex >= 0) {
2060 if (ether_addr_equal
2061 (iwdev->arp_table[arpindex].mac_addr,
2062 neigh->ha)) {
2063 /* Mac address same as in arp table */
2064 goto resolve_neigh_exit6;
2065 }
2066 i40iw_manage_arp_cache(iwdev,
2067 iwdev->arp_table[arpindex].mac_addr,
2068 dest,
2069 false,
2070 I40IW_ARP_DELETE);
2071 }
2072 i40iw_manage_arp_cache(iwdev,
2073 neigh->ha,
2074 dest,
2075 false,
2076 I40IW_ARP_ADD);
2077 rc = i40iw_arp_table(iwdev,
2078 dest,
2079 false,
2080 NULL,
2081 I40IW_ARP_RESOLVE);
2082 } else {
2083 neigh_event_send(neigh, NULL);
2084 }
2085 }
2086
2087 resolve_neigh_exit6:
2088 rcu_read_unlock();
2089 if (neigh)
2090 neigh_release(neigh);
2091 dst_release(dst);
2092 return rc;
2093}
f27b4746
FL		 2094
2095/**
2096 * i40iw_ipv4_is_loopback - check if loopback
2097 * @loc_addr: local addr to compare
2098 * @rem_addr: remote address
2099 */
2100static bool i40iw_ipv4_is_loopback(u32 loc_addr, u32 rem_addr)
2101{
2102 return ipv4_is_loopback(htonl(rem_addr)) || (loc_addr == rem_addr);
2103}
2104
2105/**
2106 * i40iw_ipv6_is_loopback - check if loopback
2107 * @loc_addr: local addr to compare
2108 * @rem_addr: remote address
2109 */
2110static bool i40iw_ipv6_is_loopback(u32 *loc_addr, u32 *rem_addr)
2111{
2112 struct in6_addr raddr6;
2113
2114 i40iw_copy_ip_htonl(raddr6.in6_u.u6_addr32, rem_addr);
f606d893 2115 return !memcmp(loc_addr, rem_addr, 16) || ipv6_addr_loopback(&raddr6);
f27b4746
FL		 2116}
2117
2118/**
2119 * i40iw_make_cm_node - create a new instance of a cm node
2120 * @cm_core: cm's core
2121 * @iwdev: iwarp device structure
2122 * @cm_info: quad info for connection
2123 * @listener: passive connection's listener
2124 */
2125static struct i40iw_cm_node *i40iw_make_cm_node(
2126 struct i40iw_cm_core *cm_core,
2127 struct i40iw_device *iwdev,
2128 struct i40iw_cm_info *cm_info,
2129 struct i40iw_cm_listener *listener)
2130{
2131 struct i40iw_cm_node *cm_node;
2132 struct timespec ts;
2133 int oldarpindex;
2134 int arpindex;
2135 struct net_device *netdev = iwdev->netdev;
2136
2137 /* create an hte and cm_node for this instance */
2138 cm_node = kzalloc(sizeof(*cm_node), GFP_ATOMIC);
2139 if (!cm_node)
2140 return NULL;
2141
2142 /* set our node specific transport info */
2143 cm_node->ipv4 = cm_info->ipv4;
2144 cm_node->vlan_id = cm_info->vlan_id;
0fc2dc58
HO		 2145 if ((cm_node->vlan_id == I40IW_NO_VLAN) && iwdev->dcb)
2146 cm_node->vlan_id = 0;
7eb2bde7 2147 cm_node->tos = cm_info->tos;
0fc2dc58 2148 cm_node->user_pri = cm_info->user_pri;
7eb2bde7
SS		 2149 if (listener) {
2150 if (listener->tos != cm_info->tos)
2151 i40iw_debug(&iwdev->sc_dev, I40IW_DEBUG_DCB,
2152 "application TOS[%d] and remote client TOS[%d] mismatch\n",
2153 listener->tos, cm_info->tos);
2154 cm_node->tos = max(listener->tos, cm_info->tos);
2155 cm_node->user_pri = rt_tos2priority(cm_node->tos);
2156 i40iw_debug(&iwdev->sc_dev, I40IW_DEBUG_DCB, "listener: TOS:[%d] UP:[%d]\n",
2157 cm_node->tos, cm_node->user_pri);
2158 }
f27b4746
FL		 2159 memcpy(cm_node->loc_addr, cm_info->loc_addr, sizeof(cm_node->loc_addr));
2160 memcpy(cm_node->rem_addr, cm_info->rem_addr, sizeof(cm_node->rem_addr));
f27b4746
FL		 2161 cm_node->loc_port = cm_info->loc_port;
2162 cm_node->rem_port = cm_info->rem_port;
f27b4746
FL		 2163
2164 cm_node->mpa_frame_rev = iwdev->mpa_version;
2165 cm_node->send_rdma0_op = SEND_RDMA_READ_ZERO;
2166 cm_node->ird_size = I40IW_MAX_IRD_SIZE;
2167 cm_node->ord_size = I40IW_MAX_ORD_SIZE;
2168
2169 cm_node->listener = listener;
2170 cm_node->cm_id = cm_info->cm_id;
2171 ether_addr_copy(cm_node->loc_mac, netdev->dev_addr);
2172 spin_lock_init(&cm_node->retrans_list_lock);
2173
2174 atomic_set(&cm_node->ref_count, 1);
2175 /* associate our parent CM core */
2176 cm_node->cm_core = cm_core;
2177 cm_node->tcp_cntxt.loc_id = I40IW_CM_DEF_LOCAL_ID;
2178 cm_node->tcp_cntxt.rcv_wscale = I40IW_CM_DEFAULT_RCV_WND_SCALE;
2179 cm_node->tcp_cntxt.rcv_wnd =
2180 I40IW_CM_DEFAULT_RCV_WND_SCALED >> I40IW_CM_DEFAULT_RCV_WND_SCALE;
2181 ts = current_kernel_time();
20c61f7e 2182 cm_node->tcp_cntxt.loc_seq_num = ts.tv_nsec;
d6f7bbcc 2183 cm_node->tcp_cntxt.mss = iwdev->vsi.mss;
f27b4746
FL		 2184
2185 cm_node->iwdev = iwdev;
2186 cm_node->dev = &iwdev->sc_dev;
2187
2188 if ((cm_node->ipv4 &&
2189 i40iw_ipv4_is_loopback(cm_node->loc_addr[0], cm_node->rem_addr[0])) ||
2190 (!cm_node->ipv4 && i40iw_ipv6_is_loopback(cm_node->loc_addr,
2191 cm_node->rem_addr))) {
2192 arpindex = i40iw_arp_table(iwdev,
8d8cd0bf 2193 cm_node->rem_addr,
f27b4746
FL		 2194 false,
2195 NULL,
2196 I40IW_ARP_RESOLVE);
2197 } else {
2198 oldarpindex = i40iw_arp_table(iwdev,
8d8cd0bf 2199 cm_node->rem_addr,
f27b4746
FL		 2200 false,
2201 NULL,
2202 I40IW_ARP_RESOLVE);
2203 if (cm_node->ipv4)
2204 arpindex = i40iw_addr_resolve_neigh(iwdev,
8d8cd0bf
FL		 2205 cm_info->loc_addr[0],
2206 cm_info->rem_addr[0],
f27b4746 2207 oldarpindex);
2fe78571 2208 else if (IS_ENABLED(CONFIG_IPV6))
f27b4746 2209 arpindex = i40iw_addr_resolve_neigh_ipv6(iwdev,
8d8cd0bf
FL		 2210 cm_info->loc_addr,
2211 cm_info->rem_addr,
f27b4746 2212 oldarpindex);
2fe78571
AB		 2213 else
2214 arpindex = -EINVAL;
f27b4746
FL		 2215 }
2216 if (arpindex < 0) {
2217 i40iw_pr_err("cm_node arpindex\n");
2218 kfree(cm_node);
2219 return NULL;
2220 }
2221 ether_addr_copy(cm_node->rem_mac, iwdev->arp_table[arpindex].mac_addr);
2222 i40iw_add_hte_node(cm_core, cm_node);
2223 cm_core->stats_nodes_created++;
2224 return cm_node;
2225}
2226
2227/**
2228 * i40iw_rem_ref_cm_node - destroy an instance of a cm node
2229 * @cm_node: connection's node
2230 */
2231static void i40iw_rem_ref_cm_node(struct i40iw_cm_node *cm_node)
2232{
2233 struct i40iw_cm_core *cm_core = cm_node->cm_core;
2234 struct i40iw_qp *iwqp;
2235 struct i40iw_cm_info nfo;
2236 unsigned long flags;
2237
2238 spin_lock_irqsave(&cm_node->cm_core->ht_lock, flags);
2239 if (atomic_dec_return(&cm_node->ref_count)) {
2240 spin_unlock_irqrestore(&cm_node->cm_core->ht_lock, flags);
2241 return;
2242 }
2243 list_del(&cm_node->list);
2244 spin_unlock_irqrestore(&cm_node->cm_core->ht_lock, flags);
2245
2246 /* if the node is destroyed before connection was accelerated */
2247 if (!cm_node->accelerated && cm_node->accept_pend) {
2248 pr_err("node destroyed before established\n");
2249 atomic_dec(&cm_node->listener->pend_accepts_cnt);
2250 }
2251 if (cm_node->close_entry)
2252 i40iw_handle_close_entry(cm_node, 0);
2253 if (cm_node->listener) {
2254 i40iw_dec_refcnt_listen(cm_core, cm_node->listener, 0, true);
2255 } else {
20c61f7e 2256 if (!i40iw_listen_port_in_use(cm_core, cm_node->loc_port) &&
1ad19f73 2257 cm_node->apbvt_set) {
f27b4746 2258 i40iw_manage_apbvt(cm_node->iwdev,
8d8cd0bf 2259 cm_node->loc_port,
f27b4746
FL		 2260 I40IW_MANAGE_APBVT_DEL);
2261 i40iw_get_addr_info(cm_node, &nfo);
f27b4746
FL		 2262 if (cm_node->qhash_set) {
2263 i40iw_manage_qhash(cm_node->iwdev,
2264 &nfo,
2265 I40IW_QHASH_TYPE_TCP_ESTABLISHED,
2266 I40IW_QHASH_MANAGE_TYPE_DELETE,
2267 NULL,
2268 false);
2269 cm_node->qhash_set = 0;
2270 }
2271 }
2272 }
2273
2274 iwqp = cm_node->iwqp;
2275 if (iwqp) {
2276 iwqp->cm_node = NULL;
2277 i40iw_rem_ref(&iwqp->ibqp);
2278 cm_node->iwqp = NULL;
2279 } else if (cm_node->qhash_set) {
2280 i40iw_get_addr_info(cm_node, &nfo);
f27b4746
FL		 2281 i40iw_manage_qhash(cm_node->iwdev,
2282 &nfo,
2283 I40IW_QHASH_TYPE_TCP_ESTABLISHED,
2284 I40IW_QHASH_MANAGE_TYPE_DELETE,
2285 NULL,
2286 false);
2287 cm_node->qhash_set = 0;
2288 }
2289
2290 cm_node->cm_core->stats_nodes_destroyed++;
2291 kfree(cm_node);
2292}
2293
2294/**
2295 * i40iw_handle_fin_pkt - FIN packet received
2296 * @cm_node: connection's node
2297 */
2298static void i40iw_handle_fin_pkt(struct i40iw_cm_node *cm_node)
2299{
2300 u32 ret;
2301
2302 switch (cm_node->state) {
2303 case I40IW_CM_STATE_SYN_RCVD:
2304 case I40IW_CM_STATE_SYN_SENT:
2305 case I40IW_CM_STATE_ESTABLISHED:
2306 case I40IW_CM_STATE_MPAREJ_RCVD:
2307 cm_node->tcp_cntxt.rcv_nxt++;
2308 i40iw_cleanup_retrans_entry(cm_node);
2309 cm_node->state = I40IW_CM_STATE_LAST_ACK;
2310 i40iw_send_fin(cm_node);
2311 break;
2312 case I40IW_CM_STATE_MPAREQ_SENT:
2313 i40iw_create_event(cm_node, I40IW_CM_EVENT_ABORTED);
2314 cm_node->tcp_cntxt.rcv_nxt++;
2315 i40iw_cleanup_retrans_entry(cm_node);
2316 cm_node->state = I40IW_CM_STATE_CLOSED;
2317 atomic_inc(&cm_node->ref_count);
2318 i40iw_send_reset(cm_node);
2319 break;
2320 case I40IW_CM_STATE_FIN_WAIT1:
2321 cm_node->tcp_cntxt.rcv_nxt++;
2322 i40iw_cleanup_retrans_entry(cm_node);
2323 cm_node->state = I40IW_CM_STATE_CLOSING;
2324 i40iw_send_ack(cm_node);
2325 /*
2326 * Wait for ACK as this is simultaneous close.
2327 * After we receive ACK, do not send anything.
2328 * Just rm the node.
2329 */
2330 break;
2331 case I40IW_CM_STATE_FIN_WAIT2:
2332 cm_node->tcp_cntxt.rcv_nxt++;
2333 i40iw_cleanup_retrans_entry(cm_node);
2334 cm_node->state = I40IW_CM_STATE_TIME_WAIT;
2335 i40iw_send_ack(cm_node);
2336 ret =
2337 i40iw_schedule_cm_timer(cm_node, NULL, I40IW_TIMER_TYPE_CLOSE, 1, 0);
2338 if (ret)
2339 i40iw_pr_err("node %p state = %d\n", cm_node, cm_node->state);
2340 break;
2341 case I40IW_CM_STATE_TIME_WAIT:
2342 cm_node->tcp_cntxt.rcv_nxt++;
2343 i40iw_cleanup_retrans_entry(cm_node);
2344 cm_node->state = I40IW_CM_STATE_CLOSED;
2345 i40iw_rem_ref_cm_node(cm_node);
2346 break;
2347 case I40IW_CM_STATE_OFFLOADED:
2348 default:
2349 i40iw_pr_err("bad state node %p state = %d\n", cm_node, cm_node->state);
2350 break;
2351 }
2352}
2353
2354/**
2355 * i40iw_handle_rst_pkt - process received RST packet
2356 * @cm_node: connection's node
2357 * @rbuf: receive buffer
2358 */
2359static void i40iw_handle_rst_pkt(struct i40iw_cm_node *cm_node,
2360 struct i40iw_puda_buf *rbuf)
2361{
2362 i40iw_cleanup_retrans_entry(cm_node);
2363 switch (cm_node->state) {
2364 case I40IW_CM_STATE_SYN_SENT:
2365 case I40IW_CM_STATE_MPAREQ_SENT:
2366 switch (cm_node->mpa_frame_rev) {
2367 case IETF_MPA_V2:
2368 cm_node->mpa_frame_rev = IETF_MPA_V1;
2369 /* send a syn and goto syn sent state */
2370 cm_node->state = I40IW_CM_STATE_SYN_SENT;
2371 if (i40iw_send_syn(cm_node, 0))
2372 i40iw_active_open_err(cm_node, false);
2373 break;
2374 case IETF_MPA_V1:
2375 default:
2376 i40iw_active_open_err(cm_node, false);
2377 break;
2378 }
2379 break;
2380 case I40IW_CM_STATE_MPAREQ_RCVD:
2381 atomic_add_return(1, &cm_node->passive_state);
2382 break;
2383 case I40IW_CM_STATE_ESTABLISHED:
2384 case I40IW_CM_STATE_SYN_RCVD:
2385 case I40IW_CM_STATE_LISTENING:
2386 i40iw_pr_err("Bad state state = %d\n", cm_node->state);
2387 i40iw_passive_open_err(cm_node, false);
2388 break;
2389 case I40IW_CM_STATE_OFFLOADED:
2390 i40iw_active_open_err(cm_node, false);
2391 break;
2392 case I40IW_CM_STATE_CLOSED:
2393 break;
2394 case I40IW_CM_STATE_FIN_WAIT2:
2395 case I40IW_CM_STATE_FIN_WAIT1:
2396 case I40IW_CM_STATE_LAST_ACK:
2397 cm_node->cm_id->rem_ref(cm_node->cm_id);
2398 case I40IW_CM_STATE_TIME_WAIT:
2399 cm_node->state = I40IW_CM_STATE_CLOSED;
2400 i40iw_rem_ref_cm_node(cm_node);
2401 break;
2402 default:
2403 break;
2404 }
2405}
2406
2407/**
2408 * i40iw_handle_rcv_mpa - Process a recv'd mpa buffer
2409 * @cm_node: connection's node
2410 * @rbuf: receive buffer
2411 */
2412static void i40iw_handle_rcv_mpa(struct i40iw_cm_node *cm_node,
2413 struct i40iw_puda_buf *rbuf)
2414{
2415 int ret;
2416 int datasize = rbuf->datalen;
2417 u8 *dataloc = rbuf->data;
2418
2419 enum i40iw_cm_event_type type = I40IW_CM_EVENT_UNKNOWN;
2420 u32 res_type;
2421
2422 ret = i40iw_parse_mpa(cm_node, dataloc, &res_type, datasize);
2423 if (ret) {
2424 if (cm_node->state == I40IW_CM_STATE_MPAREQ_SENT)
2425 i40iw_active_open_err(cm_node, true);
2426 else
2427 i40iw_passive_open_err(cm_node, true);
2428 return;
2429 }
2430
2431 switch (cm_node->state) {
2432 case I40IW_CM_STATE_ESTABLISHED:
2433 if (res_type == I40IW_MPA_REQUEST_REJECT)
2434 i40iw_pr_err("state for reject\n");
2435 cm_node->state = I40IW_CM_STATE_MPAREQ_RCVD;
2436 type = I40IW_CM_EVENT_MPA_REQ;
2437 i40iw_send_ack(cm_node); /* ACK received MPA request */
2438 atomic_set(&cm_node->passive_state,
2439 I40IW_PASSIVE_STATE_INDICATED);
2440 break;
2441 case I40IW_CM_STATE_MPAREQ_SENT:
2442 i40iw_cleanup_retrans_entry(cm_node);
2443 if (res_type == I40IW_MPA_REQUEST_REJECT) {
2444 type = I40IW_CM_EVENT_MPA_REJECT;
2445 cm_node->state = I40IW_CM_STATE_MPAREJ_RCVD;
2446 } else {
2447 type = I40IW_CM_EVENT_CONNECTED;
2448 cm_node->state = I40IW_CM_STATE_OFFLOADED;
2449 i40iw_send_ack(cm_node);
2450 }
2451 break;
2452 default:
2453 pr_err("%s wrong cm_node state =%d\n", __func__, cm_node->state);
2454 break;
2455 }
2456 i40iw_create_event(cm_node, type);
2457}
2458
2459/**
2460 * i40iw_indicate_pkt_err - Send up err event to cm
2461 * @cm_node: connection's node
2462 */
2463static void i40iw_indicate_pkt_err(struct i40iw_cm_node *cm_node)
2464{
2465 switch (cm_node->state) {
2466 case I40IW_CM_STATE_SYN_SENT:
2467 case I40IW_CM_STATE_MPAREQ_SENT:
2468 i40iw_active_open_err(cm_node, true);
2469 break;
2470 case I40IW_CM_STATE_ESTABLISHED:
2471 case I40IW_CM_STATE_SYN_RCVD:
2472 i40iw_passive_open_err(cm_node, true);
2473 break;
2474 case I40IW_CM_STATE_OFFLOADED:
2475 default:
2476 break;
2477 }
2478}
2479
2480/**
2481 * i40iw_check_syn - Check for error on received syn ack
2482 * @cm_node: connection's node
2483 * @tcph: pointer tcp header
2484 */
2485static int i40iw_check_syn(struct i40iw_cm_node *cm_node, struct tcphdr *tcph)
2486{
2487 int err = 0;
2488
2489 if (ntohl(tcph->ack_seq) != cm_node->tcp_cntxt.loc_seq_num) {
2490 err = 1;
2491 i40iw_active_open_err(cm_node, true);
2492 }
2493 return err;
2494}
2495
2496/**
2497 * i40iw_check_seq - check seq numbers if OK
2498 * @cm_node: connection's node
2499 * @tcph: pointer tcp header
2500 */
2501static int i40iw_check_seq(struct i40iw_cm_node *cm_node, struct tcphdr *tcph)
2502{
2503 int err = 0;
2504 u32 seq;
2505 u32 ack_seq;
2506 u32 loc_seq_num = cm_node->tcp_cntxt.loc_seq_num;
2507 u32 rcv_nxt = cm_node->tcp_cntxt.rcv_nxt;
2508 u32 rcv_wnd;
2509
2510 seq = ntohl(tcph->seq);
2511 ack_seq = ntohl(tcph->ack_seq);
2512 rcv_wnd = cm_node->tcp_cntxt.rcv_wnd;
2513 if (ack_seq != loc_seq_num)
2514 err = -1;
2515 else if (!between(seq, rcv_nxt, (rcv_nxt + rcv_wnd)))
2516 err = -1;
2517 if (err) {
2518 i40iw_pr_err("seq number\n");
2519 i40iw_indicate_pkt_err(cm_node);
2520 }
2521 return err;
2522}
2523
2524/**
2525 * i40iw_handle_syn_pkt - is for Passive node
2526 * @cm_node: connection's node
2527 * @rbuf: receive buffer
2528 */
2529static void i40iw_handle_syn_pkt(struct i40iw_cm_node *cm_node,
2530 struct i40iw_puda_buf *rbuf)
2531{
2532 struct tcphdr *tcph = (struct tcphdr *)rbuf->tcph;
2533 int ret;
2534 u32 inc_sequence;
2535 int optionsize;
2536 struct i40iw_cm_info nfo;
2537
2538 optionsize = (tcph->doff << 2) - sizeof(struct tcphdr);
2539 inc_sequence = ntohl(tcph->seq);
2540
2541 switch (cm_node->state) {
2542 case I40IW_CM_STATE_SYN_SENT:
2543 case I40IW_CM_STATE_MPAREQ_SENT:
2544 /* Rcvd syn on active open connection */
2545 i40iw_active_open_err(cm_node, 1);
2546 break;
2547 case I40IW_CM_STATE_LISTENING:
2548 /* Passive OPEN */
2549 if (atomic_read(&cm_node->listener->pend_accepts_cnt) >
2550 cm_node->listener->backlog) {
2551 cm_node->cm_core->stats_backlog_drops++;
2552 i40iw_passive_open_err(cm_node, false);
2553 break;
2554 }
2555 ret = i40iw_handle_tcp_options(cm_node, tcph, optionsize, 1);
2556 if (ret) {
2557 i40iw_passive_open_err(cm_node, false);
2558 /* drop pkt */
2559 break;
2560 }
2561 cm_node->tcp_cntxt.rcv_nxt = inc_sequence + 1;
2562 cm_node->accept_pend = 1;
2563 atomic_inc(&cm_node->listener->pend_accepts_cnt);
2564
2565 cm_node->state = I40IW_CM_STATE_SYN_RCVD;
2566 i40iw_get_addr_info(cm_node, &nfo);
2567 ret = i40iw_manage_qhash(cm_node->iwdev,
2568 &nfo,
2569 I40IW_QHASH_TYPE_TCP_ESTABLISHED,
2570 I40IW_QHASH_MANAGE_TYPE_ADD,
2571 (void *)cm_node,
2572 false);
2573 cm_node->qhash_set = true;
2574 break;
2575 case I40IW_CM_STATE_CLOSED:
2576 i40iw_cleanup_retrans_entry(cm_node);
2577 atomic_inc(&cm_node->ref_count);
2578 i40iw_send_reset(cm_node);
2579 break;
2580 case I40IW_CM_STATE_OFFLOADED:
2581 case I40IW_CM_STATE_ESTABLISHED:
2582 case I40IW_CM_STATE_FIN_WAIT1:
2583 case I40IW_CM_STATE_FIN_WAIT2:
2584 case I40IW_CM_STATE_MPAREQ_RCVD:
2585 case I40IW_CM_STATE_LAST_ACK:
2586 case I40IW_CM_STATE_CLOSING:
2587 case I40IW_CM_STATE_UNKNOWN:
2588 default:
2589 break;
2590 }
2591}
2592
2593/**
2594 * i40iw_handle_synack_pkt - Process SYN+ACK packet (active side)
2595 * @cm_node: connection's node
2596 * @rbuf: receive buffer
2597 */
2598static void i40iw_handle_synack_pkt(struct i40iw_cm_node *cm_node,
2599 struct i40iw_puda_buf *rbuf)
2600{
2601 struct tcphdr *tcph = (struct tcphdr *)rbuf->tcph;
2602 int ret;
2603 u32 inc_sequence;
2604 int optionsize;
2605
2606 optionsize = (tcph->doff << 2) - sizeof(struct tcphdr);
2607 inc_sequence = ntohl(tcph->seq);
2608 switch (cm_node->state) {
2609 case I40IW_CM_STATE_SYN_SENT:
2610 i40iw_cleanup_retrans_entry(cm_node);
2611 /* active open */
2612 if (i40iw_check_syn(cm_node, tcph)) {
2613 i40iw_pr_err("check syn fail\n");
2614 return;
2615 }
2616 cm_node->tcp_cntxt.rem_ack_num = ntohl(tcph->ack_seq);
2617 /* setup options */
2618 ret = i40iw_handle_tcp_options(cm_node, tcph, optionsize, 0);
2619 if (ret) {
2620 i40iw_debug(cm_node->dev,
2621 I40IW_DEBUG_CM,
2622 "cm_node=%p tcp_options failed\n",
2623 cm_node);
2624 break;
2625 }
2626 i40iw_cleanup_retrans_entry(cm_node);
2627 cm_node->tcp_cntxt.rcv_nxt = inc_sequence + 1;
2628 i40iw_send_ack(cm_node); /* ACK for the syn_ack */
2629 ret = i40iw_send_mpa_request(cm_node);
2630 if (ret) {
2631 i40iw_debug(cm_node->dev,
2632 I40IW_DEBUG_CM,
2633 "cm_node=%p i40iw_send_mpa_request failed\n",
2634 cm_node);
2635 break;
2636 }
2637 cm_node->state = I40IW_CM_STATE_MPAREQ_SENT;
2638 break;
2639 case I40IW_CM_STATE_MPAREQ_RCVD:
2640 i40iw_passive_open_err(cm_node, true);
2641 break;
2642 case I40IW_CM_STATE_LISTENING:
2643 cm_node->tcp_cntxt.loc_seq_num = ntohl(tcph->ack_seq);
2644 i40iw_cleanup_retrans_entry(cm_node);
2645 cm_node->state = I40IW_CM_STATE_CLOSED;
2646 i40iw_send_reset(cm_node);
2647 break;
2648 case I40IW_CM_STATE_CLOSED:
2649 cm_node->tcp_cntxt.loc_seq_num = ntohl(tcph->ack_seq);
2650 i40iw_cleanup_retrans_entry(cm_node);
2651 atomic_inc(&cm_node->ref_count);
2652 i40iw_send_reset(cm_node);
2653 break;
2654 case I40IW_CM_STATE_ESTABLISHED:
2655 case I40IW_CM_STATE_FIN_WAIT1:
2656 case I40IW_CM_STATE_FIN_WAIT2:
2657 case I40IW_CM_STATE_LAST_ACK:
2658 case I40IW_CM_STATE_OFFLOADED:
2659 case I40IW_CM_STATE_CLOSING:
2660 case I40IW_CM_STATE_UNKNOWN:
2661 case I40IW_CM_STATE_MPAREQ_SENT:
2662 default:
2663 break;
2664 }
2665}
2666
2667/**
2668 * i40iw_handle_ack_pkt - process packet with ACK
2669 * @cm_node: connection's node
2670 * @rbuf: receive buffer
2671 */
2672static int i40iw_handle_ack_pkt(struct i40iw_cm_node *cm_node,
2673 struct i40iw_puda_buf *rbuf)
2674{
2675 struct tcphdr *tcph = (struct tcphdr *)rbuf->tcph;
2676 u32 inc_sequence;
2677 int ret = 0;
2678 int optionsize;
2679 u32 datasize = rbuf->datalen;
2680
2681 optionsize = (tcph->doff << 2) - sizeof(struct tcphdr);
2682
2683 if (i40iw_check_seq(cm_node, tcph))
2684 return -EINVAL;
2685
2686 inc_sequence = ntohl(tcph->seq);
2687 switch (cm_node->state) {
2688 case I40IW_CM_STATE_SYN_RCVD:
2689 i40iw_cleanup_retrans_entry(cm_node);
2690 ret = i40iw_handle_tcp_options(cm_node, tcph, optionsize, 1);
2691 if (ret)
2692 break;
2693 cm_node->tcp_cntxt.rem_ack_num = ntohl(tcph->ack_seq);
2694 cm_node->state = I40IW_CM_STATE_ESTABLISHED;
2695 if (datasize) {
2696 cm_node->tcp_cntxt.rcv_nxt = inc_sequence + datasize;
f27b4746
FL		 2697 i40iw_handle_rcv_mpa(cm_node, rbuf);
2698 }
2699 break;
2700 case I40IW_CM_STATE_ESTABLISHED:
2701 i40iw_cleanup_retrans_entry(cm_node);
2702 if (datasize) {
2703 cm_node->tcp_cntxt.rcv_nxt = inc_sequence + datasize;
2704 i40iw_handle_rcv_mpa(cm_node, rbuf);
2705 }
2706 break;
2707 case I40IW_CM_STATE_MPAREQ_SENT:
2708 cm_node->tcp_cntxt.rem_ack_num = ntohl(tcph->ack_seq);
2709 if (datasize) {
2710 cm_node->tcp_cntxt.rcv_nxt = inc_sequence + datasize;
2711 i40iw_handle_rcv_mpa(cm_node, rbuf);
2712 }
2713 break;
2714 case I40IW_CM_STATE_LISTENING:
2715 i40iw_cleanup_retrans_entry(cm_node);
2716 cm_node->state = I40IW_CM_STATE_CLOSED;
2717 i40iw_send_reset(cm_node);
2718 break;
2719 case I40IW_CM_STATE_CLOSED:
2720 i40iw_cleanup_retrans_entry(cm_node);
2721 atomic_inc(&cm_node->ref_count);
2722 i40iw_send_reset(cm_node);
2723 break;
2724 case I40IW_CM_STATE_LAST_ACK:
2725 case I40IW_CM_STATE_CLOSING:
2726 i40iw_cleanup_retrans_entry(cm_node);
2727 cm_node->state = I40IW_CM_STATE_CLOSED;
2728 if (!cm_node->accept_pend)
2729 cm_node->cm_id->rem_ref(cm_node->cm_id);
2730 i40iw_rem_ref_cm_node(cm_node);
2731 break;
2732 case I40IW_CM_STATE_FIN_WAIT1:
2733 i40iw_cleanup_retrans_entry(cm_node);
2734 cm_node->state = I40IW_CM_STATE_FIN_WAIT2;
2735 break;
2736 case I40IW_CM_STATE_SYN_SENT:
2737 case I40IW_CM_STATE_FIN_WAIT2:
2738 case I40IW_CM_STATE_OFFLOADED:
2739 case I40IW_CM_STATE_MPAREQ_RCVD:
2740 case I40IW_CM_STATE_UNKNOWN:
2741 default:
2742 i40iw_cleanup_retrans_entry(cm_node);
2743 break;
2744 }
2745 return ret;
2746}
2747
2748/**
2749 * i40iw_process_packet - process cm packet
2750 * @cm_node: connection's node
2751 * @rbuf: receive buffer
2752 */
2753static void i40iw_process_packet(struct i40iw_cm_node *cm_node,
2754 struct i40iw_puda_buf *rbuf)
2755{
2756 enum i40iw_tcpip_pkt_type pkt_type = I40IW_PKT_TYPE_UNKNOWN;
2757 struct tcphdr *tcph = (struct tcphdr *)rbuf->tcph;
2758 u32 fin_set = 0;
2759 int ret;
2760
2761 if (tcph->rst) {
2762 pkt_type = I40IW_PKT_TYPE_RST;
2763 } else if (tcph->syn) {
2764 pkt_type = I40IW_PKT_TYPE_SYN;
2765 if (tcph->ack)
2766 pkt_type = I40IW_PKT_TYPE_SYNACK;
2767 } else if (tcph->ack) {
2768 pkt_type = I40IW_PKT_TYPE_ACK;
2769 }
2770 if (tcph->fin)
2771 fin_set = 1;
2772
2773 switch (pkt_type) {
2774 case I40IW_PKT_TYPE_SYN:
2775 i40iw_handle_syn_pkt(cm_node, rbuf);
2776 break;
2777 case I40IW_PKT_TYPE_SYNACK:
2778 i40iw_handle_synack_pkt(cm_node, rbuf);
2779 break;
2780 case I40IW_PKT_TYPE_ACK:
2781 ret = i40iw_handle_ack_pkt(cm_node, rbuf);
2782 if (fin_set && !ret)
2783 i40iw_handle_fin_pkt(cm_node);
2784 break;
2785 case I40IW_PKT_TYPE_RST:
2786 i40iw_handle_rst_pkt(cm_node, rbuf);
2787 break;
2788 default:
2789 if (fin_set &&
2790 (!i40iw_check_seq(cm_node, (struct tcphdr *)rbuf->tcph)))
2791 i40iw_handle_fin_pkt(cm_node);
2792 break;
2793 }
2794}
2795
2796/**
2797 * i40iw_make_listen_node - create a listen node with params
2798 * @cm_core: cm's core
2799 * @iwdev: iwarp device structure
2800 * @cm_info: quad info for connection
2801 */
2802static struct i40iw_cm_listener *i40iw_make_listen_node(
2803 struct i40iw_cm_core *cm_core,
2804 struct i40iw_device *iwdev,
2805 struct i40iw_cm_info *cm_info)
2806{
2807 struct i40iw_cm_listener *listener;
f27b4746
FL		 2808 unsigned long flags;
2809
2810 /* cannot have multiple matching listeners */
2811 listener = i40iw_find_listener(cm_core, cm_info->loc_addr,
2812 cm_info->loc_port,
2813 cm_info->vlan_id,
8d8cd0bf 2814 I40IW_CM_LISTENER_EITHER_STATE);
f27b4746
FL		 2815 if (listener &&
2816 (listener->listener_state == I40IW_CM_LISTENER_ACTIVE_STATE)) {
2817 atomic_dec(&listener->ref_count);
2818 i40iw_debug(cm_core->dev,
2819 I40IW_DEBUG_CM,
2820 "Not creating listener since it already exists\n");
2821 return NULL;
2822 }
2823
2824 if (!listener) {
f27b4746
FL		 2825 /* create a CM listen node (1/2 node to compare incoming traffic to) */
2826 listener = kzalloc(sizeof(*listener), GFP_ATOMIC);
2827 if (!listener)
2828 return NULL;
2829 cm_core->stats_listen_nodes_created++;
2830 memcpy(listener->loc_addr, cm_info->loc_addr, sizeof(listener->loc_addr));
f27b4746 2831 listener->loc_port = cm_info->loc_port;
f27b4746
FL		 2832
2833 INIT_LIST_HEAD(&listener->child_listen_list);
2834
2835 atomic_set(&listener->ref_count, 1);
2836 } else {
2837 listener->reused_node = 1;
2838 }
2839
2840 listener->cm_id = cm_info->cm_id;
2841 listener->ipv4 = cm_info->ipv4;
2842 listener->vlan_id = cm_info->vlan_id;
2843 atomic_set(&listener->pend_accepts_cnt, 0);
2844 listener->cm_core = cm_core;
2845 listener->iwdev = iwdev;
2846
2847 listener->backlog = cm_info->backlog;
2848 listener->listener_state = I40IW_CM_LISTENER_ACTIVE_STATE;
2849
2850 if (!listener->reused_node) {
2851 spin_lock_irqsave(&cm_core->listen_list_lock, flags);
2852 list_add(&listener->list, &cm_core->listen_nodes);
2853 spin_unlock_irqrestore(&cm_core->listen_list_lock, flags);
2854 }
2855
2856 return listener;
2857}
2858
2859/**
2860 * i40iw_create_cm_node - make a connection node with params
2861 * @cm_core: cm's core
2862 * @iwdev: iwarp device structure
2863 * @private_data_len: len to provate data for mpa request
2864 * @private_data: pointer to private data for connection
2865 * @cm_info: quad info for connection
2866 */
2867static struct i40iw_cm_node *i40iw_create_cm_node(
2868 struct i40iw_cm_core *cm_core,
2869 struct i40iw_device *iwdev,
2870 u16 private_data_len,
2871 void *private_data,
2872 struct i40iw_cm_info *cm_info)
2873{
f27b4746
FL		 2874 struct i40iw_cm_node *cm_node;
2875 struct i40iw_cm_listener *loopback_remotelistener;
2876 struct i40iw_cm_node *loopback_remotenode;
2877 struct i40iw_cm_info loopback_cm_info;
2878
2879 /* create a CM connection node */
2880 cm_node = i40iw_make_cm_node(cm_core, iwdev, cm_info, NULL);
2881 if (!cm_node)
bf69f494 2882 return ERR_PTR(-ENOMEM);
f27b4746
FL		 2883 /* set our node side to client (active) side */
2884 cm_node->tcp_cntxt.client = 1;
2885 cm_node->tcp_cntxt.rcv_wscale = I40IW_CM_DEFAULT_RCV_WND_SCALE;
2886
2887 if (!memcmp(cm_info->loc_addr, cm_info->rem_addr, sizeof(cm_info->loc_addr))) {
2888 loopback_remotelistener = i40iw_find_listener(
2889 cm_core,
8d8cd0bf
FL		 2890 cm_info->rem_addr,
2891 cm_node->rem_port,
f27b4746 2892 cm_node->vlan_id,
8d8cd0bf 2893 I40IW_CM_LISTENER_ACTIVE_STATE);
f27b4746 2894 if (!loopback_remotelistener) {
bf69f494
SS		 2895 i40iw_rem_ref_cm_node(cm_node);
2896 return ERR_PTR(-ECONNREFUSED);
f27b4746
FL		 2897 } else {
2898 loopback_cm_info = *cm_info;
2899 loopback_cm_info.loc_port = cm_info->rem_port;
2900 loopback_cm_info.rem_port = cm_info->loc_port;
f27b4746
FL		 2901 loopback_cm_info.cm_id = loopback_remotelistener->cm_id;
2902 loopback_cm_info.ipv4 = cm_info->ipv4;
2903 loopback_remotenode = i40iw_make_cm_node(cm_core,
2904 iwdev,
2905 &loopback_cm_info,
2906 loopback_remotelistener);
2907 if (!loopback_remotenode) {
2908 i40iw_rem_ref_cm_node(cm_node);
bf69f494 2909 return ERR_PTR(-ENOMEM);
f27b4746
FL		 2910 }
2911 cm_core->stats_loopbacks++;
2912 loopback_remotenode->loopbackpartner = cm_node;
2913 loopback_remotenode->tcp_cntxt.rcv_wscale =
2914 I40IW_CM_DEFAULT_RCV_WND_SCALE;
2915 cm_node->loopbackpartner = loopback_remotenode;
2916 memcpy(loopback_remotenode->pdata_buf, private_data,
2917 private_data_len);
2918 loopback_remotenode->pdata.size = private_data_len;
2919
2920 cm_node->state = I40IW_CM_STATE_OFFLOADED;
2921 cm_node->tcp_cntxt.rcv_nxt =
2922 loopback_remotenode->tcp_cntxt.loc_seq_num;
2923 loopback_remotenode->tcp_cntxt.rcv_nxt =
2924 cm_node->tcp_cntxt.loc_seq_num;
2925 cm_node->tcp_cntxt.max_snd_wnd =
2926 loopback_remotenode->tcp_cntxt.rcv_wnd;
2927 loopback_remotenode->tcp_cntxt.max_snd_wnd = cm_node->tcp_cntxt.rcv_wnd;
2928 cm_node->tcp_cntxt.snd_wnd = loopback_remotenode->tcp_cntxt.rcv_wnd;
2929 loopback_remotenode->tcp_cntxt.snd_wnd = cm_node->tcp_cntxt.rcv_wnd;
2930 cm_node->tcp_cntxt.snd_wscale = loopback_remotenode->tcp_cntxt.rcv_wscale;
2931 loopback_remotenode->tcp_cntxt.snd_wscale = cm_node->tcp_cntxt.rcv_wscale;
2932 loopback_remotenode->state = I40IW_CM_STATE_MPAREQ_RCVD;
2933 i40iw_create_event(loopback_remotenode, I40IW_CM_EVENT_MPA_REQ);
2934 }
2935 return cm_node;
2936 }
2937
2938 cm_node->pdata.size = private_data_len;
2939 cm_node->pdata.addr = cm_node->pdata_buf;
2940
2941 memcpy(cm_node->pdata_buf, private_data, private_data_len);
2942
2943 cm_node->state = I40IW_CM_STATE_SYN_SENT;
f27b4746
FL		 2944 return cm_node;
2945}
2946
2947/**
2948 * i40iw_cm_reject - reject and teardown a connection
2949 * @cm_node: connection's node
2950 * @pdate: ptr to private data for reject
2951 * @plen: size of private data
2952 */
2953static int i40iw_cm_reject(struct i40iw_cm_node *cm_node, const void *pdata, u8 plen)
2954{
2955 int ret = 0;
2956 int err;
2957 int passive_state;
2958 struct iw_cm_id *cm_id = cm_node->cm_id;
2959 struct i40iw_cm_node *loopback = cm_node->loopbackpartner;
2960
2961 if (cm_node->tcp_cntxt.client)
2962 return ret;
2963 i40iw_cleanup_retrans_entry(cm_node);
2964
2965 if (!loopback) {
2966 passive_state = atomic_add_return(1, &cm_node->passive_state);
2967 if (passive_state == I40IW_SEND_RESET_EVENT) {
2968 cm_node->state = I40IW_CM_STATE_CLOSED;
2969 i40iw_rem_ref_cm_node(cm_node);
2970 } else {
2971 if (cm_node->state == I40IW_CM_STATE_LISTENER_DESTROYED) {
2972 i40iw_rem_ref_cm_node(cm_node);
2973 } else {
2974 ret = i40iw_send_mpa_reject(cm_node, pdata, plen);
2975 if (ret) {
2976 cm_node->state = I40IW_CM_STATE_CLOSED;
2977 err = i40iw_send_reset(cm_node);
2978 if (err)
2979 i40iw_pr_err("send reset failed\n");
2980 } else {
2981 cm_id->add_ref(cm_id);
2982 }
2983 }
2984 }
2985 } else {
2986 cm_node->cm_id = NULL;
2987 if (cm_node->state == I40IW_CM_STATE_LISTENER_DESTROYED) {
2988 i40iw_rem_ref_cm_node(cm_node);
2989 i40iw_rem_ref_cm_node(loopback);
2990 } else {
2991 ret = i40iw_send_cm_event(loopback,
2992 loopback->cm_id,
2993 IW_CM_EVENT_CONNECT_REPLY,
2994 -ECONNREFUSED);
2995 i40iw_rem_ref_cm_node(cm_node);
2996 loopback->state = I40IW_CM_STATE_CLOSING;
2997
2998 cm_id = loopback->cm_id;
2999 i40iw_rem_ref_cm_node(loopback);
3000 cm_id->rem_ref(cm_id);
3001 }
3002 }
3003
3004 return ret;
3005}
3006
3007/**
3008 * i40iw_cm_close - close of cm connection
3009 * @cm_node: connection's node
3010 */
3011static int i40iw_cm_close(struct i40iw_cm_node *cm_node)
3012{
3013 int ret = 0;
3014
3015 if (!cm_node)
3016 return -EINVAL;
3017
3018 switch (cm_node->state) {
3019 case I40IW_CM_STATE_SYN_RCVD:
3020 case I40IW_CM_STATE_SYN_SENT:
3021 case I40IW_CM_STATE_ONE_SIDE_ESTABLISHED:
3022 case I40IW_CM_STATE_ESTABLISHED:
3023 case I40IW_CM_STATE_ACCEPTING:
3024 case I40IW_CM_STATE_MPAREQ_SENT:
3025 case I40IW_CM_STATE_MPAREQ_RCVD:
3026 i40iw_cleanup_retrans_entry(cm_node);
3027 i40iw_send_reset(cm_node);
3028 break;
3029 case I40IW_CM_STATE_CLOSE_WAIT:
3030 cm_node->state = I40IW_CM_STATE_LAST_ACK;
3031 i40iw_send_fin(cm_node);
3032 break;
3033 case I40IW_CM_STATE_FIN_WAIT1:
3034 case I40IW_CM_STATE_FIN_WAIT2:
3035 case I40IW_CM_STATE_LAST_ACK:
3036 case I40IW_CM_STATE_TIME_WAIT:
3037 case I40IW_CM_STATE_CLOSING:
3038 ret = -1;
3039 break;
3040 case I40IW_CM_STATE_LISTENING:
3041 i40iw_cleanup_retrans_entry(cm_node);
3042 i40iw_send_reset(cm_node);
3043 break;
3044 case I40IW_CM_STATE_MPAREJ_RCVD:
3045 case I40IW_CM_STATE_UNKNOWN:
3046 case I40IW_CM_STATE_INITED:
3047 case I40IW_CM_STATE_CLOSED:
3048 case I40IW_CM_STATE_LISTENER_DESTROYED:
3049 i40iw_rem_ref_cm_node(cm_node);
3050 break;
3051 case I40IW_CM_STATE_OFFLOADED:
3052 if (cm_node->send_entry)
3053 i40iw_pr_err("send_entry\n");
3054 i40iw_rem_ref_cm_node(cm_node);
3055 break;
3056 }
3057 return ret;
3058}
3059
3060/**
3061 * i40iw_receive_ilq - recv an ETHERNET packet, and process it
3062 * through CM
d6f7bbcc 3063 * @vsi: pointer to the vsi structure
f27b4746
FL		 3064 * @rbuf: receive buffer
3065 */
d6f7bbcc 3066void i40iw_receive_ilq(struct i40iw_sc_vsi *vsi, struct i40iw_puda_buf *rbuf)
f27b4746
FL		 3067{
3068 struct i40iw_cm_node *cm_node;
3069 struct i40iw_cm_listener *listener;
3070 struct iphdr *iph;
3071 struct ipv6hdr *ip6h;
3072 struct tcphdr *tcph;
3073 struct i40iw_cm_info cm_info;
d6f7bbcc 3074 struct i40iw_sc_dev *dev = vsi->dev;
f27b4746
FL		 3075 struct i40iw_device *iwdev = (struct i40iw_device *)dev->back_dev;
3076 struct i40iw_cm_core *cm_core = &iwdev->cm_core;
3077 struct vlan_ethhdr *ethh;
0fc2dc58 3078 u16 vtag;
f27b4746
FL		 3079
3080 /* if vlan, then maclen = 18 else 14 */
3081 iph = (struct iphdr *)rbuf->iph;
3082 memset(&cm_info, 0, sizeof(cm_info));
3083
3084 i40iw_debug_buf(dev,
3085 I40IW_DEBUG_ILQ,
3086 "RECEIVE ILQ BUFFER",
3087 rbuf->mem.va,
3088 rbuf->totallen);
3089 ethh = (struct vlan_ethhdr *)rbuf->mem.va;
3090
3091 if (ethh->h_vlan_proto == htons(ETH_P_8021Q)) {
0fc2dc58
HO		 3092 vtag = ntohs(ethh->h_vlan_TCI);
3093 cm_info.user_pri = (vtag & VLAN_PRIO_MASK) >> VLAN_PRIO_SHIFT;
3094 cm_info.vlan_id = vtag & VLAN_VID_MASK;
f27b4746
FL		 3095 i40iw_debug(cm_core->dev,
3096 I40IW_DEBUG_CM,
3097 "%s vlan_id=%d\n",
3098 __func__,
3099 cm_info.vlan_id);
3100 } else {
3101 cm_info.vlan_id = I40IW_NO_VLAN;
3102 }
3103 tcph = (struct tcphdr *)rbuf->tcph;
3104
3105 if (rbuf->ipv4) {
3106 cm_info.loc_addr[0] = ntohl(iph->daddr);
3107 cm_info.rem_addr[0] = ntohl(iph->saddr);
3108 cm_info.ipv4 = true;
7eb2bde7 3109 cm_info.tos = iph->tos;
f27b4746
FL		 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;
7eb2bde7 3117 cm_info.tos = (ip6h->priority << 4) | (ip6h->flow_lbl[0] >> 4);
f27b4746
FL		 3118 }
3119 cm_info.loc_port = ntohs(tcph->dest);
3120 cm_info.rem_port = ntohs(tcph->source);
f27b4746 3121 cm_node = i40iw_find_node(cm_core,
8d8cd0bf
FL		 3122 cm_info.rem_port,
3123 cm_info.rem_addr,
3124 cm_info.loc_port,
3125 cm_info.loc_addr,
f27b4746
FL		 3126 true);
3127
3128 if (!cm_node) {
3129 /* Only type of packet accepted are for */
3130 /* the PASSIVE open (syn only) */
3131 if (!tcph->syn || tcph->ack)
3132 return;
3133 listener =
3134 i40iw_find_listener(cm_core,
8d8cd0bf
FL		 3135 cm_info.loc_addr,
3136 cm_info.loc_port,
f27b4746 3137 cm_info.vlan_id,
8d8cd0bf 3138 I40IW_CM_LISTENER_ACTIVE_STATE);
f27b4746
FL		 3139 if (!listener) {
3140 cm_info.cm_id = NULL;
3141 i40iw_debug(cm_core->dev,
3142 I40IW_DEBUG_CM,
3143 "%s no listener found\n",
3144 __func__);
3145 return;
3146 }
3147 cm_info.cm_id = listener->cm_id;
3148 cm_node = i40iw_make_cm_node(cm_core, iwdev, &cm_info, listener);
3149 if (!cm_node) {
3150 i40iw_debug(cm_core->dev,
3151 I40IW_DEBUG_CM,
3152 "%s allocate node failed\n",
3153 __func__);
3154 atomic_dec(&listener->ref_count);
3155 return;
3156 }
3157 if (!tcph->rst && !tcph->fin) {
3158 cm_node->state = I40IW_CM_STATE_LISTENING;
3159 } else {
3160 i40iw_rem_ref_cm_node(cm_node);
3161 return;
3162 }
3163 atomic_inc(&cm_node->ref_count);
3164 } else if (cm_node->state == I40IW_CM_STATE_OFFLOADED) {
3165 i40iw_rem_ref_cm_node(cm_node);
3166 return;
3167 }
3168 i40iw_process_packet(cm_node, rbuf);
3169 i40iw_rem_ref_cm_node(cm_node);
3170}
3171
3172/**
3173 * i40iw_setup_cm_core - allocate a top level instance of a cm
3174 * core
3175 * @iwdev: iwarp device structure
3176 */
3177void i40iw_setup_cm_core(struct i40iw_device *iwdev)
3178{
3179 struct i40iw_cm_core *cm_core = &iwdev->cm_core;
3180
3181 cm_core->iwdev = iwdev;
3182 cm_core->dev = &iwdev->sc_dev;
3183
3184 INIT_LIST_HEAD(&cm_core->connected_nodes);
3185 INIT_LIST_HEAD(&cm_core->listen_nodes);
3186
3187 init_timer(&cm_core->tcp_timer);
3188 cm_core->tcp_timer.function = i40iw_cm_timer_tick;
3189 cm_core->tcp_timer.data = (unsigned long)cm_core;
3190
3191 spin_lock_init(&cm_core->ht_lock);
3192 spin_lock_init(&cm_core->listen_list_lock);
3193
5e9ff9b0
BS		 3194 cm_core->event_wq = alloc_ordered_workqueue("iwewq",
3195 WQ_MEM_RECLAIM);
3196
3197 cm_core->disconn_wq = alloc_ordered_workqueue("iwdwq",
3198 WQ_MEM_RECLAIM);
f27b4746
FL		 3199}
3200
3201/**
3202 * i40iw_cleanup_cm_core - deallocate a top level instance of a
3203 * cm core
3204 * @cm_core: cm's core
3205 */
3206void i40iw_cleanup_cm_core(struct i40iw_cm_core *cm_core)
3207{
3208 unsigned long flags;
3209
3210 if (!cm_core)
3211 return;
3212
3213 spin_lock_irqsave(&cm_core->ht_lock, flags);
3214 if (timer_pending(&cm_core->tcp_timer))
3215 del_timer_sync(&cm_core->tcp_timer);
3216 spin_unlock_irqrestore(&cm_core->ht_lock, flags);
3217
3218 destroy_workqueue(cm_core->event_wq);
3219 destroy_workqueue(cm_core->disconn_wq);
3220}
3221
3222/**
3223 * i40iw_init_tcp_ctx - setup qp context
3224 * @cm_node: connection's node
3225 * @tcp_info: offload info for tcp
3226 * @iwqp: associate qp for the connection
3227 */
3228static void i40iw_init_tcp_ctx(struct i40iw_cm_node *cm_node,
3229 struct i40iw_tcp_offload_info *tcp_info,
3230 struct i40iw_qp *iwqp)
3231{
3232 tcp_info->ipv4 = cm_node->ipv4;
3233 tcp_info->drop_ooo_seg = true;
3234 tcp_info->wscale = true;
3235 tcp_info->ignore_tcp_opt = true;
3236 tcp_info->ignore_tcp_uns_opt = true;
3237 tcp_info->no_nagle = false;
3238
3239 tcp_info->ttl = I40IW_DEFAULT_TTL;
3240 tcp_info->rtt_var = cpu_to_le32(I40IW_DEFAULT_RTT_VAR);
3241 tcp_info->ss_thresh = cpu_to_le32(I40IW_DEFAULT_SS_THRESH);
3242 tcp_info->rexmit_thresh = I40IW_DEFAULT_REXMIT_THRESH;
3243
3244 tcp_info->tcp_state = I40IW_TCP_STATE_ESTABLISHED;
3245 tcp_info->snd_wscale = cm_node->tcp_cntxt.snd_wscale;
3246 tcp_info->rcv_wscale = cm_node->tcp_cntxt.rcv_wscale;
3247
3248 tcp_info->snd_nxt = cpu_to_le32(cm_node->tcp_cntxt.loc_seq_num);
3249 tcp_info->snd_wnd = cpu_to_le32(cm_node->tcp_cntxt.snd_wnd);
3250 tcp_info->rcv_nxt = cpu_to_le32(cm_node->tcp_cntxt.rcv_nxt);
3251 tcp_info->snd_max = cpu_to_le32(cm_node->tcp_cntxt.loc_seq_num);
3252
3253 tcp_info->snd_una = cpu_to_le32(cm_node->tcp_cntxt.loc_seq_num);
3254 tcp_info->cwnd = cpu_to_le32(2 * cm_node->tcp_cntxt.mss);
3255 tcp_info->snd_wl1 = cpu_to_le32(cm_node->tcp_cntxt.rcv_nxt);
3256 tcp_info->snd_wl2 = cpu_to_le32(cm_node->tcp_cntxt.loc_seq_num);
3257 tcp_info->max_snd_window = cpu_to_le32(cm_node->tcp_cntxt.max_snd_wnd);
3258 tcp_info->rcv_wnd = cpu_to_le32(cm_node->tcp_cntxt.rcv_wnd <<
3259 cm_node->tcp_cntxt.rcv_wscale);
3260
3261 tcp_info->flow_label = 0;
3262 tcp_info->snd_mss = cpu_to_le32(((u32)cm_node->tcp_cntxt.mss));
3263 if (cm_node->vlan_id < VLAN_TAG_PRESENT) {
3264 tcp_info->insert_vlan_tag = true;
3265 tcp_info->vlan_tag = cpu_to_le16(cm_node->vlan_id);
3266 }
3267 if (cm_node->ipv4) {
8d8cd0bf
FL		 3268 tcp_info->src_port = cpu_to_le16(cm_node->loc_port);
3269 tcp_info->dst_port = cpu_to_le16(cm_node->rem_port);
f27b4746 3270
8d8cd0bf
FL		 3271 tcp_info->dest_ip_addr3 = cpu_to_le32(cm_node->rem_addr[0]);
3272 tcp_info->local_ipaddr3 = cpu_to_le32(cm_node->loc_addr[0]);
20c61f7e
IM		 3273 tcp_info->arp_idx =
3274 cpu_to_le16((u16)i40iw_arp_table(
3275 iwqp->iwdev,
3276 &tcp_info->dest_ip_addr3,
3277 true,
3278 NULL,
3279 I40IW_ARP_RESOLVE));
f27b4746 3280 } else {
8d8cd0bf
FL		 3281 tcp_info->src_port = cpu_to_le16(cm_node->loc_port);
3282 tcp_info->dst_port = cpu_to_le16(cm_node->rem_port);
3283 tcp_info->dest_ip_addr0 = cpu_to_le32(cm_node->rem_addr[0]);
3284 tcp_info->dest_ip_addr1 = cpu_to_le32(cm_node->rem_addr[1]);
3285 tcp_info->dest_ip_addr2 = cpu_to_le32(cm_node->rem_addr[2]);
3286 tcp_info->dest_ip_addr3 = cpu_to_le32(cm_node->rem_addr[3]);
3287 tcp_info->local_ipaddr0 = cpu_to_le32(cm_node->loc_addr[0]);
3288 tcp_info->local_ipaddr1 = cpu_to_le32(cm_node->loc_addr[1]);
3289 tcp_info->local_ipaddr2 = cpu_to_le32(cm_node->loc_addr[2]);
3290 tcp_info->local_ipaddr3 = cpu_to_le32(cm_node->loc_addr[3]);
20c61f7e
IM		 3291 tcp_info->arp_idx =
3292 cpu_to_le16((u16)i40iw_arp_table(
3293 iwqp->iwdev,
3294 &tcp_info->dest_ip_addr0,
3295 false,
3296 NULL,
3297 I40IW_ARP_RESOLVE));
f27b4746
FL		 3298 }
3299}
3300
3301/**
3302 * i40iw_cm_init_tsa_conn - setup qp for RTS
3303 * @iwqp: associate qp for the connection
3304 * @cm_node: connection's node
3305 */
3306static void i40iw_cm_init_tsa_conn(struct i40iw_qp *iwqp,
3307 struct i40iw_cm_node *cm_node)
3308{
3309 struct i40iw_tcp_offload_info tcp_info;
3310 struct i40iwarp_offload_info *iwarp_info;
3311 struct i40iw_qp_host_ctx_info *ctx_info;
3312 struct i40iw_device *iwdev = iwqp->iwdev;
3313 struct i40iw_sc_dev *dev = &iwqp->iwdev->sc_dev;
3314
3315 memset(&tcp_info, 0x00, sizeof(struct i40iw_tcp_offload_info));
3316 iwarp_info = &iwqp->iwarp_info;
3317 ctx_info = &iwqp->ctx_info;
3318
3319 ctx_info->tcp_info = &tcp_info;
3320 ctx_info->send_cq_num = iwqp->iwscq->sc_cq.cq_uk.cq_id;
3321 ctx_info->rcv_cq_num = iwqp->iwrcq->sc_cq.cq_uk.cq_id;
3322
3323 iwarp_info->ord_size = cm_node->ord_size;
3324 iwarp_info->ird_size = i40iw_derive_hw_ird_setting(cm_node->ird_size);
3325
3326 if (iwarp_info->ord_size == 1)
3327 iwarp_info->ord_size = 2;
3328
3329 iwarp_info->rd_enable = true;
3330 iwarp_info->rdmap_ver = 1;
3331 iwarp_info->ddp_ver = 1;
3332
3333 iwarp_info->pd_id = iwqp->iwpd->sc_pd.pd_id;
3334
3335 ctx_info->tcp_info_valid = true;
3336 ctx_info->iwarp_info_valid = true;
0fc2dc58
HO		 3337 ctx_info->add_to_qoslist = true;
3338 ctx_info->user_pri = cm_node->user_pri;
f27b4746
FL		 3339
3340 i40iw_init_tcp_ctx(cm_node, &tcp_info, iwqp);
3341 if (cm_node->snd_mark_en) {
3342 iwarp_info->snd_mark_en = true;
3343 iwarp_info->snd_mark_offset = (tcp_info.snd_nxt &
3344 SNDMARKER_SEQNMASK) + cm_node->lsmm_size;
3345 }
3346
3347 cm_node->state = I40IW_CM_STATE_OFFLOADED;
3348 tcp_info.tcp_state = I40IW_TCP_STATE_ESTABLISHED;
3349 tcp_info.src_mac_addr_idx = iwdev->mac_ip_table_idx;
7eb2bde7 3350 tcp_info.tos = cm_node->tos;
f27b4746
FL		 3351
3352 dev->iw_priv_qp_ops->qp_setctx(&iwqp->sc_qp, (u64 *)(iwqp->host_ctx.va), ctx_info);
3353
3354 /* once tcp_info is set, no need to do it again */
3355 ctx_info->tcp_info_valid = false;
3356 ctx_info->iwarp_info_valid = false;
0fc2dc58 3357 ctx_info->add_to_qoslist = false;
f27b4746
FL		 3358}
3359
3360/**
3361 * i40iw_cm_disconn - when a connection is being closed
3362 * @iwqp: associate qp for the connection
3363 */
f4a87ca1 3364void i40iw_cm_disconn(struct i40iw_qp *iwqp)
f27b4746
FL		 3365{
3366 struct disconn_work *work;
3367 struct i40iw_device *iwdev = iwqp->iwdev;
3368 struct i40iw_cm_core *cm_core = &iwdev->cm_core;
f4a87ca1 3369 unsigned long flags;
f27b4746
FL		 3370
3371 work = kzalloc(sizeof(*work), GFP_ATOMIC);
3372 if (!work)
f4a87ca1
MI		 3373 return; /* Timer will clean up */
3374
3375 spin_lock_irqsave(&iwdev->qptable_lock, flags);
3376 if (!iwdev->qp_table[iwqp->ibqp.qp_num]) {
3377 spin_unlock_irqrestore(&iwdev->qptable_lock, flags);
3378 i40iw_debug(&iwdev->sc_dev, I40IW_DEBUG_CM,
3379 "%s qp_id %d is already freed\n",
3380 __func__, iwqp->ibqp.qp_num);
3381 kfree(work);
3382 return;
3383 }
f27b4746 3384 i40iw_add_ref(&iwqp->ibqp);
f4a87ca1
MI		 3385 spin_unlock_irqrestore(&iwdev->qptable_lock, flags);
3386
f27b4746
FL		 3387 work->iwqp = iwqp;
3388 INIT_WORK(&work->work, i40iw_disconnect_worker);
3389 queue_work(cm_core->disconn_wq, &work->work);
f4a87ca1 3390 return;
f27b4746
FL		 3391}
3392
f27b4746
FL		 3393/**
3394 * i40iw_qp_disconnect - free qp and close cm
3395 * @iwqp: associate qp for the connection
3396 */
3397static void i40iw_qp_disconnect(struct i40iw_qp *iwqp)
3398{
3399 struct i40iw_device *iwdev;
3400 struct i40iw_ib_device *iwibdev;
3401
3402 iwdev = to_iwdev(iwqp->ibqp.device);
3403 if (!iwdev) {
3404 i40iw_pr_err("iwdev == NULL\n");
3405 return;
3406 }
3407
3408 iwibdev = iwdev->iwibdev;
3409
3410 if (iwqp->active_conn) {
3411 /* indicate this connection is NOT active */
3412 iwqp->active_conn = 0;
3413 } else {
3414 /* Need to free the Last Streaming Mode Message */
3415 if (iwqp->ietf_mem.va) {
3416 if (iwqp->lsmm_mr)
3417 iwibdev->ibdev.dereg_mr(iwqp->lsmm_mr);
3418 i40iw_free_dma_mem(iwdev->sc_dev.hw, &iwqp->ietf_mem);
3419 }
3420 }
3421
3422 /* close the CM node down if it is still active */
3423 if (iwqp->cm_node) {
3424 i40iw_debug(&iwdev->sc_dev, I40IW_DEBUG_CM, "%s Call close API\n", __func__);
3425 i40iw_cm_close(iwqp->cm_node);
3426 }
3427}
3428
3429/**
3430 * i40iw_cm_disconn_true - called by worker thread to disconnect qp
3431 * @iwqp: associate qp for the connection
3432 */
3433static void i40iw_cm_disconn_true(struct i40iw_qp *iwqp)
3434{
3435 struct iw_cm_id *cm_id;
3436 struct i40iw_device *iwdev;
3437 struct i40iw_sc_qp *qp = &iwqp->sc_qp;
3438 u16 last_ae;
3439 u8 original_hw_tcp_state;
3440 u8 original_ibqp_state;
3441 int disconn_status = 0;
3442 int issue_disconn = 0;
3443 int issue_close = 0;
3444 int issue_flush = 0;
3445 struct ib_event ibevent;
3446 unsigned long flags;
3447 int ret;
3448
3449 if (!iwqp) {
3450 i40iw_pr_err("iwqp == NULL\n");
3451 return;
3452 }
3453
3454 spin_lock_irqsave(&iwqp->lock, flags);
3455 cm_id = iwqp->cm_id;
3456 /* make sure we havent already closed this connection */
3457 if (!cm_id) {
3458 spin_unlock_irqrestore(&iwqp->lock, flags);
3459 return;
3460 }
3461
3462 iwdev = to_iwdev(iwqp->ibqp.device);
3463
3464 original_hw_tcp_state = iwqp->hw_tcp_state;
3465 original_ibqp_state = iwqp->ibqp_state;
3466 last_ae = iwqp->last_aeq;
3467
3468 if (qp->term_flags) {
3469 issue_disconn = 1;
3470 issue_close = 1;
3471 iwqp->cm_id = NULL;
3472 /*When term timer expires after cm_timer, don't want
3473 *terminate-handler to issue cm_disconn which can re-free
3474 *a QP even after its refcnt=0.
3475 */
d627b506 3476 i40iw_terminate_del_timer(qp);
f27b4746
FL		 3477 if (!iwqp->flush_issued) {
3478 iwqp->flush_issued = 1;
3479 issue_flush = 1;
3480 }
3481 } else if ((original_hw_tcp_state == I40IW_TCP_STATE_CLOSE_WAIT) ||
3482 ((original_ibqp_state == IB_QPS_RTS) &&
3483 (last_ae == I40IW_AE_LLP_CONNECTION_RESET))) {
3484 issue_disconn = 1;
3485 if (last_ae == I40IW_AE_LLP_CONNECTION_RESET)
3486 disconn_status = -ECONNRESET;
3487 }
3488
3489 if (((original_hw_tcp_state == I40IW_TCP_STATE_CLOSED) ||
3490 (original_hw_tcp_state == I40IW_TCP_STATE_TIME_WAIT) ||
3491 (last_ae == I40IW_AE_RDMAP_ROE_BAD_LLP_CLOSE) ||
3492 (last_ae == I40IW_AE_LLP_CONNECTION_RESET))) {
3493 issue_close = 1;
3494 iwqp->cm_id = NULL;
3495 if (!iwqp->flush_issued) {
3496 iwqp->flush_issued = 1;
3497 issue_flush = 1;
3498 }
3499 }
3500
3501 spin_unlock_irqrestore(&iwqp->lock, flags);
3502 if (issue_flush && !iwqp->destroyed) {
3503 /* Flush the queues */
3504 i40iw_flush_wqes(iwdev, iwqp);
3505
e0b010da 3506 if (qp->term_flags && iwqp->ibqp.event_handler) {
f27b4746
FL		 3507 ibevent.device = iwqp->ibqp.device;
3508 ibevent.event = (qp->eventtype == TERM_EVENT_QP_FATAL) ?
3509 IB_EVENT_QP_FATAL : IB_EVENT_QP_ACCESS_ERR;
3510 ibevent.element.qp = &iwqp->ibqp;
3511 iwqp->ibqp.event_handler(&ibevent, iwqp->ibqp.qp_context);
3512 }
3513 }
3514
3515 if (cm_id && cm_id->event_handler) {
3516 if (issue_disconn) {
3517 ret = i40iw_send_cm_event(NULL,
3518 cm_id,
3519 IW_CM_EVENT_DISCONNECT,
3520 disconn_status);
3521
3522 if (ret)
3523 i40iw_debug(&iwdev->sc_dev,
3524 I40IW_DEBUG_CM,
3525 "disconnect event failed %s: - cm_id = %p\n",
3526 __func__, cm_id);
3527 }
3528 if (issue_close) {
3529 i40iw_qp_disconnect(iwqp);
3530 cm_id->provider_data = iwqp;
3531 ret = i40iw_send_cm_event(NULL, cm_id, IW_CM_EVENT_CLOSE, 0);
3532 if (ret)
3533 i40iw_debug(&iwdev->sc_dev,
3534 I40IW_DEBUG_CM,
3535 "close event failed %s: - cm_id = %p\n",
3536 __func__, cm_id);
3537 cm_id->rem_ref(cm_id);
3538 }
3539 }
3540}
3541
3542/**
3543 * i40iw_disconnect_worker - worker for connection close
3544 * @work: points or disconn structure
3545 */
3546static void i40iw_disconnect_worker(struct work_struct *work)
3547{
3548 struct disconn_work *dwork = container_of(work, struct disconn_work, work);
3549 struct i40iw_qp *iwqp = dwork->iwqp;
3550
3551 kfree(dwork);
3552 i40iw_cm_disconn_true(iwqp);
3553 i40iw_rem_ref(&iwqp->ibqp);
3554}
3555
3556/**
3557 * i40iw_accept - registered call for connection to be accepted
3558 * @cm_id: cm information for passive connection
3559 * @conn_param: accpet parameters
3560 */
3561int i40iw_accept(struct iw_cm_id *cm_id, struct iw_cm_conn_param *conn_param)
3562{
3563 struct ib_qp *ibqp;
3564 struct i40iw_qp *iwqp;
3565 struct i40iw_device *iwdev;
3566 struct i40iw_sc_dev *dev;
3567 struct i40iw_cm_node *cm_node;
3568 struct ib_qp_attr attr;
3569 int passive_state;
f27b4746
FL		 3570 struct ib_mr *ibmr;
3571 struct i40iw_pd *iwpd;
3572 u16 buf_len = 0;
3573 struct i40iw_kmem_info accept;
3574 enum i40iw_status_code status;
3575 u64 tagged_offset;
3576
3577 memset(&attr, 0, sizeof(attr));
3578 ibqp = i40iw_get_qp(cm_id->device, conn_param->qpn);
3579 if (!ibqp)
3580 return -EINVAL;
3581
3582 iwqp = to_iwqp(ibqp);
3583 iwdev = iwqp->iwdev;
3584 dev = &iwdev->sc_dev;
3585 cm_node = (struct i40iw_cm_node *)cm_id->provider_data;
3586
3587 if (((struct sockaddr_in *)&cm_id->local_addr)->sin_family == AF_INET) {
3588 cm_node->ipv4 = true;
3589 cm_node->vlan_id = i40iw_get_vlan_ipv4(cm_node->loc_addr);
3590 } else {
3591 cm_node->ipv4 = false;
3592 i40iw_netdev_vlan_ipv6(cm_node->loc_addr, &cm_node->vlan_id, NULL);
3593 }
3594 i40iw_debug(cm_node->dev,
3595 I40IW_DEBUG_CM,
3596 "Accept vlan_id=%d\n",
3597 cm_node->vlan_id);
3598 if (cm_node->state == I40IW_CM_STATE_LISTENER_DESTROYED) {
3599 if (cm_node->loopbackpartner)
3600 i40iw_rem_ref_cm_node(cm_node->loopbackpartner);
3601 i40iw_rem_ref_cm_node(cm_node);
3602 return -EINVAL;
3603 }
3604
3605 passive_state = atomic_add_return(1, &cm_node->passive_state);
3606 if (passive_state == I40IW_SEND_RESET_EVENT) {
3607 i40iw_rem_ref_cm_node(cm_node);
3608 return -ECONNRESET;
3609 }
3610
3611 cm_node->cm_core->stats_accepts++;
3612 iwqp->cm_node = (void *)cm_node;
3613 cm_node->iwqp = iwqp;
3614
7581e96c 3615 buf_len = conn_param->private_data_len + I40IW_MAX_IETF_SIZE;
f27b4746
FL		 3616
3617 status = i40iw_allocate_dma_mem(dev->hw, &iwqp->ietf_mem, buf_len, 1);
3618
3619 if (status)
3620 return -ENOMEM;
3621 cm_node->pdata.size = conn_param->private_data_len;
3622 accept.addr = iwqp->ietf_mem.va;
3623 accept.size = i40iw_cm_build_mpa_frame(cm_node, &accept, MPA_KEY_REPLY);
3624 memcpy(accept.addr + accept.size, conn_param->private_data,
3625 conn_param->private_data_len);
3626
3627 /* setup our first outgoing iWarp send WQE (the IETF frame response) */
3628 if ((cm_node->ipv4 &&
3629 !i40iw_ipv4_is_loopback(cm_node->loc_addr[0], cm_node->rem_addr[0])) ||
3630 (!cm_node->ipv4 &&
3631 !i40iw_ipv6_is_loopback(cm_node->loc_addr, cm_node->rem_addr))) {
f27b4746
FL		 3632 iwpd = iwqp->iwpd;
3633 tagged_offset = (uintptr_t)iwqp->ietf_mem.va;
3634 ibmr = i40iw_reg_phys_mr(&iwpd->ibpd,
3635 iwqp->ietf_mem.pa,
3636 buf_len,
3637 IB_ACCESS_LOCAL_WRITE,
3638 &tagged_offset);
3639 if (IS_ERR(ibmr)) {
3640 i40iw_free_dma_mem(dev->hw, &iwqp->ietf_mem);
3641 return -ENOMEM;
3642 }
3643
3644 ibmr->pd = &iwpd->ibpd;
3645 ibmr->device = iwpd->ibpd.device;
3646 iwqp->lsmm_mr = ibmr;
3647 if (iwqp->page)
3648 iwqp->sc_qp.qp_uk.sq_base = kmap(iwqp->page);
7581e96c 3649 dev->iw_priv_qp_ops->qp_send_lsmm(&iwqp->sc_qp,
f27b4746
FL		 3650 iwqp->ietf_mem.va,
3651 (accept.size + conn_param->private_data_len),
3652 ibmr->lkey);
f27b4746
FL		 3653
3654 } else {
3655 if (iwqp->page)
3656 iwqp->sc_qp.qp_uk.sq_base = kmap(iwqp->page);
07c72d7d 3657 dev->iw_priv_qp_ops->qp_send_lsmm(&iwqp->sc_qp, NULL, 0, 0);
f27b4746
FL		 3658 }
3659
3660 if (iwqp->page)
3661 kunmap(iwqp->page);
3662
3663 iwqp->cm_id = cm_id;
3664 cm_node->cm_id = cm_id;
3665
3666 cm_id->provider_data = (void *)iwqp;
3667 iwqp->active_conn = 0;
3668
3669 cm_node->lsmm_size = accept.size + conn_param->private_data_len;
3670 i40iw_cm_init_tsa_conn(iwqp, cm_node);
3671 cm_id->add_ref(cm_id);
3672 i40iw_add_ref(&iwqp->ibqp);
3673
3674 i40iw_send_cm_event(cm_node, cm_id, IW_CM_EVENT_ESTABLISHED, 0);
3675
3676 attr.qp_state = IB_QPS_RTS;
3677 cm_node->qhash_set = false;
3678 i40iw_modify_qp(&iwqp->ibqp, &attr, IB_QP_STATE, NULL);
3679 if (cm_node->loopbackpartner) {
3680 cm_node->loopbackpartner->pdata.size = conn_param->private_data_len;
3681
3682 /* copy entire MPA frame to our cm_node's frame */
3683 memcpy(cm_node->loopbackpartner->pdata_buf,
3684 conn_param->private_data,
3685 conn_param->private_data_len);
3686 i40iw_create_event(cm_node->loopbackpartner, I40IW_CM_EVENT_CONNECTED);
3687 }
3688
3689 cm_node->accelerated = 1;
3690 if (cm_node->accept_pend) {
3691 if (!cm_node->listener)
3692 i40iw_pr_err("cm_node->listener NULL for passive node\n");
3693 atomic_dec(&cm_node->listener->pend_accepts_cnt);
3694 cm_node->accept_pend = 0;
3695 }
3696 return 0;
3697}
3698
3699/**
3700 * i40iw_reject - registered call for connection to be rejected
3701 * @cm_id: cm information for passive connection
3702 * @pdata: private data to be sent
3703 * @pdata_len: private data length
3704 */
3705int i40iw_reject(struct iw_cm_id *cm_id, const void *pdata, u8 pdata_len)
3706{
3707 struct i40iw_device *iwdev;
3708 struct i40iw_cm_node *cm_node;
3709 struct i40iw_cm_node *loopback;
3710
3711 cm_node = (struct i40iw_cm_node *)cm_id->provider_data;
3712 loopback = cm_node->loopbackpartner;
3713 cm_node->cm_id = cm_id;
3714 cm_node->pdata.size = pdata_len;
3715
3716 iwdev = to_iwdev(cm_id->device);
3717 if (!iwdev)
3718 return -EINVAL;
3719 cm_node->cm_core->stats_rejects++;
3720
3721 if (pdata_len + sizeof(struct ietf_mpa_v2) > MAX_CM_BUFFER)
3722 return -EINVAL;
3723
3724 if (loopback) {
3725 memcpy(&loopback->pdata_buf, pdata, pdata_len);
3726 loopback->pdata.size = pdata_len;
3727 }
3728
3729 return i40iw_cm_reject(cm_node, pdata, pdata_len);
3730}
3731
3732/**
3733 * i40iw_connect - registered call for connection to be established
3734 * @cm_id: cm information for passive connection
3735 * @conn_param: Information about the connection
3736 */
3737int i40iw_connect(struct iw_cm_id *cm_id, struct iw_cm_conn_param *conn_param)
3738{
3739 struct ib_qp *ibqp;
3740 struct i40iw_qp *iwqp;
3741 struct i40iw_device *iwdev;
3742 struct i40iw_cm_node *cm_node;
3743 struct i40iw_cm_info cm_info;
3744 struct sockaddr_in *laddr;
3745 struct sockaddr_in *raddr;
3746 struct sockaddr_in6 *laddr6;
3747 struct sockaddr_in6 *raddr6;
ccea5f0f 3748 bool qhash_set = false;
f27b4746 3749 int apbvt_set = 0;
bf69f494 3750 int err = 0;
f27b4746 3751 enum i40iw_status_code status;
f27b4746
FL		 3752
3753 ibqp = i40iw_get_qp(cm_id->device, conn_param->qpn);
3754 if (!ibqp)
3755 return -EINVAL;
3756 iwqp = to_iwqp(ibqp);
3757 if (!iwqp)
3758 return -EINVAL;
3759 iwdev = to_iwdev(iwqp->ibqp.device);
3760 if (!iwdev)
3761 return -EINVAL;
3762
8d8cd0bf
FL		 3763 laddr = (struct sockaddr_in *)&cm_id->m_local_addr;
3764 raddr = (struct sockaddr_in *)&cm_id->m_remote_addr;
3765 laddr6 = (struct sockaddr_in6 *)&cm_id->m_local_addr;
3766 raddr6 = (struct sockaddr_in6 *)&cm_id->m_remote_addr;
f27b4746
FL		 3767
3768 if (!(laddr->sin_port) || !(raddr->sin_port))
3769 return -EINVAL;
3770
3771 iwqp->active_conn = 1;
3772 iwqp->cm_id = NULL;
3773 cm_id->provider_data = iwqp;
3774
3775 /* set up the connection params for the node */
3776 if (cm_id->remote_addr.ss_family == AF_INET) {
3777 cm_info.ipv4 = true;
3778 memset(cm_info.loc_addr, 0, sizeof(cm_info.loc_addr));
3779 memset(cm_info.rem_addr, 0, sizeof(cm_info.rem_addr));
3780 cm_info.loc_addr[0] = ntohl(laddr->sin_addr.s_addr);
3781 cm_info.rem_addr[0] = ntohl(raddr->sin_addr.s_addr);
3782 cm_info.loc_port = ntohs(laddr->sin_port);
3783 cm_info.rem_port = ntohs(raddr->sin_port);
3784 cm_info.vlan_id = i40iw_get_vlan_ipv4(cm_info.loc_addr);
3785 } else {
3786 cm_info.ipv4 = false;
3787 i40iw_copy_ip_ntohl(cm_info.loc_addr,
3788 laddr6->sin6_addr.in6_u.u6_addr32);
3789 i40iw_copy_ip_ntohl(cm_info.rem_addr,
3790 raddr6->sin6_addr.in6_u.u6_addr32);
3791 cm_info.loc_port = ntohs(laddr6->sin6_port);
3792 cm_info.rem_port = ntohs(raddr6->sin6_port);
3793 i40iw_netdev_vlan_ipv6(cm_info.loc_addr, &cm_info.vlan_id, NULL);
3794 }
f27b4746 3795 cm_info.cm_id = cm_id;
7eb2bde7 3796 cm_info.tos = cm_id->tos;
0fc2dc58
HO		 3797 cm_info.user_pri = rt_tos2priority(cm_id->tos);
3798 i40iw_debug(&iwdev->sc_dev, I40IW_DEBUG_DCB, "%s TOS:[%d] UP:[%d]\n",
3799 __func__, cm_id->tos, cm_info.user_pri);
f27b4746
FL		 3800 if ((cm_info.ipv4 && (laddr->sin_addr.s_addr != raddr->sin_addr.s_addr)) ||
3801 (!cm_info.ipv4 && memcmp(laddr6->sin6_addr.in6_u.u6_addr32,
3802 raddr6->sin6_addr.in6_u.u6_addr32,
3803 sizeof(laddr6->sin6_addr.in6_u.u6_addr32)))) {
3804 status = i40iw_manage_qhash(iwdev,
3805 &cm_info,
3806 I40IW_QHASH_TYPE_TCP_ESTABLISHED,
3807 I40IW_QHASH_MANAGE_TYPE_ADD,
3808 NULL,
3809 true);
8d8cd0bf 3810 if (status)
f27b4746 3811 return -EINVAL;
ccea5f0f 3812 qhash_set = true;
f27b4746 3813 }
8d8cd0bf 3814 status = i40iw_manage_apbvt(iwdev, cm_info.loc_port, I40IW_MANAGE_APBVT_ADD);
f27b4746 3815 if (status) {
f27b4746
FL		 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);
bf69f494
SS		 3831
3832 if (IS_ERR(cm_node)) {
3833 err = PTR_ERR(cm_node);
3834 goto err_out;
3835 }
f27b4746
FL		 3836
3837 i40iw_record_ird_ord(cm_node, (u16)conn_param->ird, (u16)conn_param->ord);
3838 if (cm_node->send_rdma0_op == SEND_RDMA_READ_ZERO &&
3839 !cm_node->ord_size)
3840 cm_node->ord_size = 1;
3841
3842 cm_node->apbvt_set = apbvt_set;
ccea5f0f 3843 cm_node->qhash_set = qhash_set;
f27b4746
FL		 3844 iwqp->cm_node = cm_node;
3845 cm_node->iwqp = iwqp;
3846 iwqp->cm_id = cm_id;
3847 i40iw_add_ref(&iwqp->ibqp);
b3437e0d 3848
bf69f494
SS		 3849 if (cm_node->state != I40IW_CM_STATE_OFFLOADED) {
3850 cm_node->state = I40IW_CM_STATE_SYN_SENT;
3851 err = i40iw_send_syn(cm_node, 0);
3852 if (err) {
b3437e0d 3853 i40iw_rem_ref_cm_node(cm_node);
bf69f494 3854 goto err_out;
b3437e0d
IM		 3855 }
3856 }
3857
3858 i40iw_debug(cm_node->dev,
3859 I40IW_DEBUG_CM,
3860 "Api - connect(): port=0x%04x, cm_node=%p, cm_id = %p.\n",
3861 cm_node->rem_port,
3862 cm_node,
3863 cm_node->cm_id);
f27b4746 3864 return 0;
b3437e0d 3865
bf69f494
SS		 3866err_out:
3867 if (cm_info.ipv4)
3868 i40iw_debug(&iwdev->sc_dev,
3869 I40IW_DEBUG_CM,
3870 "Api - connect() FAILED: dest addr=%pI4",
3871 cm_info.rem_addr);
3872 else
3873 i40iw_debug(&iwdev->sc_dev,
3874 I40IW_DEBUG_CM,
3875 "Api - connect() FAILED: dest addr=%pI6",
3876 cm_info.rem_addr);
3877
3878 if (qhash_set)
3879 i40iw_manage_qhash(iwdev,
3880 &cm_info,
3881 I40IW_QHASH_TYPE_TCP_ESTABLISHED,
3882 I40IW_QHASH_MANAGE_TYPE_DELETE,
3883 NULL,
3884 false);
b3437e0d
IM		 3885
3886 if (apbvt_set && !i40iw_listen_port_in_use(&iwdev->cm_core,
3887 cm_info.loc_port))
3888 i40iw_manage_apbvt(iwdev,
3889 cm_info.loc_port,
3890 I40IW_MANAGE_APBVT_DEL);
3891 cm_id->rem_ref(cm_id);
3892 iwdev->cm_core.stats_connect_errs++;
bf69f494 3893 return err;
f27b4746
FL		 3894}
3895
3896/**
3897 * i40iw_create_listen - registered call creating listener
3898 * @cm_id: cm information for passive connection
3899 * @backlog: to max accept pending count
3900 */
3901int i40iw_create_listen(struct iw_cm_id *cm_id, int backlog)
3902{
3903 struct i40iw_device *iwdev;
3904 struct i40iw_cm_listener *cm_listen_node;
3905 struct i40iw_cm_info cm_info;
3906 enum i40iw_status_code ret;
3907 struct sockaddr_in *laddr;
3908 struct sockaddr_in6 *laddr6;
3909 bool wildcard = false;
3910
3911 iwdev = to_iwdev(cm_id->device);
3912 if (!iwdev)
3913 return -EINVAL;
3914
8d8cd0bf
FL		 3915 laddr = (struct sockaddr_in *)&cm_id->m_local_addr;
3916 laddr6 = (struct sockaddr_in6 *)&cm_id->m_local_addr;
f27b4746
FL		 3917 memset(&cm_info, 0, sizeof(cm_info));
3918 if (laddr->sin_family == AF_INET) {
3919 cm_info.ipv4 = true;
3920 cm_info.loc_addr[0] = ntohl(laddr->sin_addr.s_addr);
3921 cm_info.loc_port = ntohs(laddr->sin_port);
3922
3923 if (laddr->sin_addr.s_addr != INADDR_ANY)
3924 cm_info.vlan_id = i40iw_get_vlan_ipv4(cm_info.loc_addr);
3925 else
3926 wildcard = true;
3927
3928 } else {
3929 cm_info.ipv4 = false;
3930 i40iw_copy_ip_ntohl(cm_info.loc_addr,
3931 laddr6->sin6_addr.in6_u.u6_addr32);
3932 cm_info.loc_port = ntohs(laddr6->sin6_port);
3933 if (ipv6_addr_type(&laddr6->sin6_addr) != IPV6_ADDR_ANY)
3934 i40iw_netdev_vlan_ipv6(cm_info.loc_addr,
3935 &cm_info.vlan_id,
3936 NULL);
3937 else
3938 wildcard = true;
3939 }
f27b4746
FL		 3940 cm_info.backlog = backlog;
3941 cm_info.cm_id = cm_id;
3942
3943 cm_listen_node = i40iw_make_listen_node(&iwdev->cm_core, iwdev, &cm_info);
3944 if (!cm_listen_node) {
3945 i40iw_pr_err("cm_listen_node == NULL\n");
3946 return -ENOMEM;
3947 }
3948
3949 cm_id->provider_data = cm_listen_node;
3950
7eb2bde7 3951 cm_listen_node->tos = cm_id->tos;
0fc2dc58
HO		 3952 cm_listen_node->user_pri = rt_tos2priority(cm_id->tos);
3953 cm_info.user_pri = cm_listen_node->user_pri;
0fc2dc58 3954
f27b4746 3955 if (!cm_listen_node->reused_node) {
f27b4746
FL		 3956 if (wildcard) {
3957 if (cm_info.ipv4)
3958 ret = i40iw_add_mqh_4(iwdev,
3959 &cm_info,
3960 cm_listen_node);
3961 else
3962 ret = i40iw_add_mqh_6(iwdev,
3963 &cm_info,
3964 cm_listen_node);
3965 if (ret)
3966 goto error;
3967
3968 ret = i40iw_manage_apbvt(iwdev,
8d8cd0bf 3969 cm_info.loc_port,
f27b4746
FL		 3970 I40IW_MANAGE_APBVT_ADD);
3971
3972 if (ret)
3973 goto error;
3974 } else {
3975 ret = i40iw_manage_qhash(iwdev,
3976 &cm_info,
3977 I40IW_QHASH_TYPE_TCP_SYN,
3978 I40IW_QHASH_MANAGE_TYPE_ADD,
3979 NULL,
3980 true);
3981 if (ret)
3982 goto error;
3983 cm_listen_node->qhash_set = true;
3984 ret = i40iw_manage_apbvt(iwdev,
8d8cd0bf 3985 cm_info.loc_port,
f27b4746
FL		 3986 I40IW_MANAGE_APBVT_ADD);
3987 if (ret)
3988 goto error;
3989 }
3990 }
3991 cm_id->add_ref(cm_id);
3992 cm_listen_node->cm_core->stats_listen_created++;
3993 return 0;
3994 error:
3995 i40iw_cm_del_listen(&iwdev->cm_core, (void *)cm_listen_node, false);
3996 return -EINVAL;
3997}
3998
3999/**
4000 * i40iw_destroy_listen - registered call to destroy listener
4001 * @cm_id: cm information for passive connection
4002 */
4003int i40iw_destroy_listen(struct iw_cm_id *cm_id)
4004{
4005 struct i40iw_device *iwdev;
4006
4007 iwdev = to_iwdev(cm_id->device);
4008 if (cm_id->provider_data)
4009 i40iw_cm_del_listen(&iwdev->cm_core, cm_id->provider_data, true);
4010 else
4011 i40iw_pr_err("cm_id->provider_data was NULL\n");
4012
4013 cm_id->rem_ref(cm_id);
4014
4015 return 0;
4016}
4017
4018/**
4019 * i40iw_cm_event_connected - handle connected active node
4020 * @event: the info for cm_node of connection
4021 */
4022static void i40iw_cm_event_connected(struct i40iw_cm_event *event)
4023{
4024 struct i40iw_qp *iwqp;
4025 struct i40iw_device *iwdev;
4026 struct i40iw_cm_node *cm_node;
4027 struct i40iw_sc_dev *dev;
4028 struct ib_qp_attr attr;
4029 struct iw_cm_id *cm_id;
4030 int status;
4031 bool read0;
4032
4033 cm_node = event->cm_node;
4034 cm_id = cm_node->cm_id;
4035 iwqp = (struct i40iw_qp *)cm_id->provider_data;
4036 iwdev = to_iwdev(iwqp->ibqp.device);
4037 dev = &iwdev->sc_dev;
4038
4039 if (iwqp->destroyed) {
4040 status = -ETIMEDOUT;
4041 goto error;
4042 }
4043 i40iw_cm_init_tsa_conn(iwqp, cm_node);
4044 read0 = (cm_node->send_rdma0_op == SEND_RDMA_READ_ZERO);
4045 if (iwqp->page)
4046 iwqp->sc_qp.qp_uk.sq_base = kmap(iwqp->page);
4047 dev->iw_priv_qp_ops->qp_send_rtt(&iwqp->sc_qp, read0);
4048 if (iwqp->page)
4049 kunmap(iwqp->page);
4050 status = i40iw_send_cm_event(cm_node, cm_id, IW_CM_EVENT_CONNECT_REPLY, 0);
4051 if (status)
4052 i40iw_pr_err("send cm event\n");
4053
4054 memset(&attr, 0, sizeof(attr));
4055 attr.qp_state = IB_QPS_RTS;
4056 cm_node->qhash_set = false;
4057 i40iw_modify_qp(&iwqp->ibqp, &attr, IB_QP_STATE, NULL);
4058
4059 cm_node->accelerated = 1;
4060 if (cm_node->accept_pend) {
4061 if (!cm_node->listener)
4062 i40iw_pr_err("listener is null for passive node\n");
4063 atomic_dec(&cm_node->listener->pend_accepts_cnt);
4064 cm_node->accept_pend = 0;
4065 }
4066 return;
4067
4068error:
4069 iwqp->cm_id = NULL;
4070 cm_id->provider_data = NULL;
4071 i40iw_send_cm_event(event->cm_node,
4072 cm_id,
4073 IW_CM_EVENT_CONNECT_REPLY,
4074 status);
4075 cm_id->rem_ref(cm_id);
4076 i40iw_rem_ref_cm_node(event->cm_node);
4077}
4078
4079/**
4080 * i40iw_cm_event_reset - handle reset
4081 * @event: the info for cm_node of connection
4082 */
4083static void i40iw_cm_event_reset(struct i40iw_cm_event *event)
4084{
4085 struct i40iw_cm_node *cm_node = event->cm_node;
4086 struct iw_cm_id *cm_id = cm_node->cm_id;
4087 struct i40iw_qp *iwqp;
4088
4089 if (!cm_id)
4090 return;
4091
4092 iwqp = cm_id->provider_data;
4093 if (!iwqp)
4094 return;
4095
4096 i40iw_debug(cm_node->dev,
4097 I40IW_DEBUG_CM,
4098 "reset event %p - cm_id = %p\n",
4099 event->cm_node, cm_id);
4100 iwqp->cm_id = NULL;
4101
4102 i40iw_send_cm_event(cm_node, cm_node->cm_id, IW_CM_EVENT_DISCONNECT, -ECONNRESET);
4103 i40iw_send_cm_event(cm_node, cm_node->cm_id, IW_CM_EVENT_CLOSE, 0);
4104}
4105
4106/**
4107 * i40iw_cm_event_handler - worker thread callback to send event to cm upper layer
4108 * @work: pointer of cm event info.
4109 */
4110static void i40iw_cm_event_handler(struct work_struct *work)
4111{
4112 struct i40iw_cm_event *event = container_of(work,
4113 struct i40iw_cm_event,
4114 event_work);
4115 struct i40iw_cm_node *cm_node;
4116
4117 if (!event || !event->cm_node || !event->cm_node->cm_core)
4118 return;
4119
4120 cm_node = event->cm_node;
4121
4122 switch (event->type) {
4123 case I40IW_CM_EVENT_MPA_REQ:
4124 i40iw_send_cm_event(cm_node,
4125 cm_node->cm_id,
4126 IW_CM_EVENT_CONNECT_REQUEST,
4127 0);
4128 break;
4129 case I40IW_CM_EVENT_RESET:
4130 i40iw_cm_event_reset(event);
4131 break;
4132 case I40IW_CM_EVENT_CONNECTED:
4133 if (!event->cm_node->cm_id ||
4134 (event->cm_node->state != I40IW_CM_STATE_OFFLOADED))
4135 break;
4136 i40iw_cm_event_connected(event);
4137 break;
4138 case I40IW_CM_EVENT_MPA_REJECT:
4139 if (!event->cm_node->cm_id ||
4140 (cm_node->state == I40IW_CM_STATE_OFFLOADED))
4141 break;
4142 i40iw_send_cm_event(cm_node,
4143 cm_node->cm_id,
4144 IW_CM_EVENT_CONNECT_REPLY,
4145 -ECONNREFUSED);
4146 break;
4147 case I40IW_CM_EVENT_ABORTED:
4148 if (!event->cm_node->cm_id ||
4149 (event->cm_node->state == I40IW_CM_STATE_OFFLOADED))
4150 break;
4151 i40iw_event_connect_error(event);
4152 break;
4153 default:
4154 i40iw_pr_err("event type = %d\n", event->type);
4155 break;
4156 }
4157
4158 event->cm_info.cm_id->rem_ref(event->cm_info.cm_id);
4159 i40iw_rem_ref_cm_node(event->cm_node);
4160 kfree(event);
4161}
4162
4163/**
4164 * i40iw_cm_post_event - queue event request for worker thread
4165 * @event: cm node's info for up event call
4166 */
4167static void i40iw_cm_post_event(struct i40iw_cm_event *event)
4168{
4169 atomic_inc(&event->cm_node->ref_count);
4170 event->cm_info.cm_id->add_ref(event->cm_info.cm_id);
4171 INIT_WORK(&event->event_work, i40iw_cm_event_handler);
4172
4173 queue_work(event->cm_node->cm_core->event_wq, &event->event_work);
4174}
d5965934 4175
e5e74b61
MI		 4176/**
4177 * i40iw_qhash_ctrl - enable/disable qhash for list
4178 * @iwdev: device pointer
4179 * @parent_listen_node: parent listen node
4180 * @nfo: cm info node
4181 * @ipaddr: Pointer to IPv4 or IPv6 address
4182 * @ipv4: flag indicating IPv4 when true
4183 * @ifup: flag indicating interface up when true
4184 *
4185 * Enables or disables the qhash for the node in the child
4186 * listen list that matches ipaddr. If no matching IP was found
4187 * it will allocate and add a new child listen node to the
4188 * parent listen node. The listen_list_lock is assumed to be
4189 * held when called.
4190 */
4191static void i40iw_qhash_ctrl(struct i40iw_device *iwdev,
4192 struct i40iw_cm_listener *parent_listen_node,
4193 struct i40iw_cm_info *nfo,
4194 u32 *ipaddr, bool ipv4, bool ifup)
4195{
4196 struct list_head *child_listen_list = &parent_listen_node->child_listen_list;
4197 struct i40iw_cm_listener *child_listen_node;
4198 struct list_head *pos, *tpos;
4199 enum i40iw_status_code ret;
4200 bool node_allocated = false;
4201 enum i40iw_quad_hash_manage_type op =
4202 ifup ? I40IW_QHASH_MANAGE_TYPE_ADD : I40IW_QHASH_MANAGE_TYPE_DELETE;
4203
4204 list_for_each_safe(pos, tpos, child_listen_list) {
4205 child_listen_node =
4206 list_entry(pos,
4207 struct i40iw_cm_listener,
4208 child_listen_list);
4209 if (!memcmp(child_listen_node->loc_addr, ipaddr, ipv4 ? 4 : 16))
4210 goto set_qhash;
4211 }
4212
4213 /* if not found then add a child listener if interface is going up */
4214 if (!ifup)
4215 return;
4216 child_listen_node = kzalloc(sizeof(*child_listen_node), GFP_ATOMIC);
4217 if (!child_listen_node)
4218 return;
4219 node_allocated = true;
4220 memcpy(child_listen_node, parent_listen_node, sizeof(*child_listen_node));
4221
4222 memcpy(child_listen_node->loc_addr, ipaddr, ipv4 ? 4 : 16);
4223
4224set_qhash:
4225 memcpy(nfo->loc_addr,
4226 child_listen_node->loc_addr,
4227 sizeof(nfo->loc_addr));
4228 nfo->vlan_id = child_listen_node->vlan_id;
4229 ret = i40iw_manage_qhash(iwdev, nfo,
4230 I40IW_QHASH_TYPE_TCP_SYN,
4231 op,
4232 NULL, false);
4233 if (!ret) {
4234 child_listen_node->qhash_set = ifup;
4235 if (node_allocated)
4236 list_add(&child_listen_node->child_listen_list,
4237 &parent_listen_node->child_listen_list);
4238 } else if (node_allocated) {
4239 kfree(child_listen_node);
4240 }
4241}
4242
d5965934
MI		 4243/**
4244 * i40iw_cm_disconnect_all - disconnect all connected qp's
4245 * @iwdev: device pointer
4246 */
4247void i40iw_cm_disconnect_all(struct i40iw_device *iwdev)
4248{
4249 struct i40iw_cm_core *cm_core = &iwdev->cm_core;
4250 struct list_head *list_core_temp;
4251 struct list_head *list_node;
4252 struct i40iw_cm_node *cm_node;
4253 unsigned long flags;
4254 struct list_head connected_list;
4255 struct ib_qp_attr attr;
4256
4257 INIT_LIST_HEAD(&connected_list);
4258 spin_lock_irqsave(&cm_core->ht_lock, flags);
4259 list_for_each_safe(list_node, list_core_temp, &cm_core->connected_nodes) {
4260 cm_node = container_of(list_node, struct i40iw_cm_node, list);
4261 atomic_inc(&cm_node->ref_count);
4262 list_add(&cm_node->connected_entry, &connected_list);
4263 }
4264 spin_unlock_irqrestore(&cm_core->ht_lock, flags);
4265
4266 list_for_each_safe(list_node, list_core_temp, &connected_list) {
4267 cm_node = container_of(list_node, struct i40iw_cm_node, connected_entry);
4268 attr.qp_state = IB_QPS_ERR;
4269 i40iw_modify_qp(&cm_node->iwqp->ibqp, &attr, IB_QP_STATE, NULL);
4270 i40iw_rem_ref_cm_node(cm_node);
4271 }
4272}
e5e74b61
MI		 4273
4274/**
4275 * i40iw_ifdown_notify - process an ifdown on an interface
4276 * @iwdev: device pointer
4277 * @ipaddr: Pointer to IPv4 or IPv6 address
4278 * @ipv4: flag indicating IPv4 when true
4279 * @ifup: flag indicating interface up when true
4280 */
4281void i40iw_if_notify(struct i40iw_device *iwdev, struct net_device *netdev,
4282 u32 *ipaddr, bool ipv4, bool ifup)
4283{
4284 struct i40iw_cm_core *cm_core = &iwdev->cm_core;
4285 unsigned long flags;
4286 struct i40iw_cm_listener *listen_node;
4287 static const u32 ip_zero[4] = { 0, 0, 0, 0 };
4288 struct i40iw_cm_info nfo;
4289 u16 vlan_id = rdma_vlan_dev_vlan_id(netdev);
4290 enum i40iw_status_code ret;
4291 enum i40iw_quad_hash_manage_type op =
4292 ifup ? I40IW_QHASH_MANAGE_TYPE_ADD : I40IW_QHASH_MANAGE_TYPE_DELETE;
4293
4294 /* Disable or enable qhash for listeners */
4295 spin_lock_irqsave(&cm_core->listen_list_lock, flags);
4296 list_for_each_entry(listen_node, &cm_core->listen_nodes, list) {
4297 if (vlan_id == listen_node->vlan_id &&
4298 (!memcmp(listen_node->loc_addr, ipaddr, ipv4 ? 4 : 16) ||
4299 !memcmp(listen_node->loc_addr, ip_zero, ipv4 ? 4 : 16))) {
4300 memcpy(nfo.loc_addr, listen_node->loc_addr,
4301 sizeof(nfo.loc_addr));
4302 nfo.loc_port = listen_node->loc_port;
4303 nfo.ipv4 = listen_node->ipv4;
4304 nfo.vlan_id = listen_node->vlan_id;
4305 nfo.user_pri = listen_node->user_pri;
4306 if (!list_empty(&listen_node->child_listen_list)) {
4307 i40iw_qhash_ctrl(iwdev,
4308 listen_node,
4309 &nfo,
4310 ipaddr, ipv4, ifup);
4311 } else if (memcmp(listen_node->loc_addr, ip_zero,
4312 ipv4 ? 4 : 16)) {
4313 ret = i40iw_manage_qhash(iwdev,
4314 &nfo,
4315 I40IW_QHASH_TYPE_TCP_SYN,
4316 op,
4317 NULL,
4318 false);
4319 if (!ret)
4320 listen_node->qhash_set = ifup;
4321 }
4322 }
4323 }
4324 spin_unlock_irqrestore(&cm_core->listen_list_lock, flags);
4325
4326 /* disconnect any connected qp's on ifdown */
4327 if (!ifup)
4328 i40iw_cm_disconnect_all(iwdev);
4329}
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