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Merge tag 'for-linus-20170825' of git://git.infradead.org/linux-mtd
[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 786 ctrl_ird |= IETF_PEER_TO_PEER;
f27b4746
FL		 787
788 switch (mpa_key) {
789 case MPA_KEY_REQUEST:
20c61f7e
IM		 790 ctrl_ord |= IETF_RDMA0_WRITE;
791 ctrl_ord |= IETF_RDMA0_READ;
f27b4746
FL		 792 break;
793 case MPA_KEY_REPLY:
794 switch (cm_node->send_rdma0_op) {
795 case SEND_RDMA_WRITE_ZERO:
20c61f7e 796 ctrl_ord |= IETF_RDMA0_WRITE;
f27b4746
FL		 797 break;
798 case SEND_RDMA_READ_ZERO:
20c61f7e 799 ctrl_ord |= IETF_RDMA0_READ;
f27b4746
FL		 800 break;
801 }
802 break;
803 default:
804 break;
805 }
20c61f7e
IM		 806 rtr_msg->ctrl_ird = htons(ctrl_ird);
807 rtr_msg->ctrl_ord = htons(ctrl_ord);
f27b4746
FL		 808}
809
810/**
811 * i40iw_cm_build_mpa_frame - build mpa frame for mpa version 1 or version 2
812 * @cm_node: connection's node
813 * @mpa: mpa: data buffer
814 * @mpa_key: to do read0 or write0
815 */
816static int i40iw_cm_build_mpa_frame(struct i40iw_cm_node *cm_node,
817 struct i40iw_kmem_info *mpa,
818 u8 mpa_key)
819{
820 int hdr_len = 0;
821
822 switch (cm_node->mpa_frame_rev) {
823 case IETF_MPA_V1:
824 hdr_len = sizeof(struct ietf_mpa_v1);
825 i40iw_build_mpa_v1(cm_node, mpa->addr, mpa_key);
826 break;
827 case IETF_MPA_V2:
828 hdr_len = sizeof(struct ietf_mpa_v2);
829 i40iw_build_mpa_v2(cm_node, mpa->addr, mpa_key);
830 break;
831 default:
832 break;
833 }
834
835 return hdr_len;
836}
837
838/**
839 * i40iw_send_mpa_request - active node send mpa request to passive node
840 * @cm_node: connection's node
841 */
842static int i40iw_send_mpa_request(struct i40iw_cm_node *cm_node)
843{
844 struct i40iw_puda_buf *sqbuf;
845
846 if (!cm_node) {
847 i40iw_pr_err("cm_node == NULL\n");
848 return -1;
849 }
850
851 cm_node->mpa_hdr.addr = &cm_node->mpa_frame;
852 cm_node->mpa_hdr.size = i40iw_cm_build_mpa_frame(cm_node,
853 &cm_node->mpa_hdr,
854 MPA_KEY_REQUEST);
855 if (!cm_node->mpa_hdr.size) {
856 i40iw_pr_err("mpa size = %d\n", cm_node->mpa_hdr.size);
857 return -1;
858 }
859
860 sqbuf = i40iw_form_cm_frame(cm_node,
861 NULL,
862 &cm_node->mpa_hdr,
863 &cm_node->pdata,
864 SET_ACK);
865 if (!sqbuf) {
866 i40iw_pr_err("sq_buf == NULL\n");
867 return -1;
868 }
f27b4746
FL		 869 return i40iw_schedule_cm_timer(cm_node, sqbuf, I40IW_TIMER_TYPE_SEND, 1, 0);
870}
871
872/**
873 * i40iw_send_mpa_reject -
874 * @cm_node: connection's node
875 * @pdata: reject data for connection
876 * @plen: length of reject data
877 */
878static int i40iw_send_mpa_reject(struct i40iw_cm_node *cm_node,
879 const void *pdata,
880 u8 plen)
881{
882 struct i40iw_puda_buf *sqbuf;
883 struct i40iw_kmem_info priv_info;
884
885 cm_node->mpa_hdr.addr = &cm_node->mpa_frame;
886 cm_node->mpa_hdr.size = i40iw_cm_build_mpa_frame(cm_node,
887 &cm_node->mpa_hdr,
888 MPA_KEY_REPLY);
889
890 cm_node->mpa_frame.flags |= IETF_MPA_FLAGS_REJECT;
891 priv_info.addr = (void *)pdata;
892 priv_info.size = plen;
893
894 sqbuf = i40iw_form_cm_frame(cm_node,
895 NULL,
896 &cm_node->mpa_hdr,
897 &priv_info,
898 SET_ACK | SET_FIN);
899 if (!sqbuf) {
900 i40iw_pr_err("no sqbuf\n");
901 return -ENOMEM;
902 }
903 cm_node->state = I40IW_CM_STATE_FIN_WAIT1;
904 return i40iw_schedule_cm_timer(cm_node, sqbuf, I40IW_TIMER_TYPE_SEND, 1, 0);
905}
906
907/**
908 * recv_mpa - process an IETF MPA frame
909 * @cm_node: connection's node
910 * @buffer: Data pointer
911 * @type: to return accept or reject
912 * @len: Len of mpa buffer
913 */
914static int i40iw_parse_mpa(struct i40iw_cm_node *cm_node, u8 *buffer, u32 *type, u32 len)
915{
916 struct ietf_mpa_v1 *mpa_frame;
917 struct ietf_mpa_v2 *mpa_v2_frame;
918 struct ietf_rtr_msg *rtr_msg;
919 int mpa_hdr_len;
920 int priv_data_len;
921
922 *type = I40IW_MPA_REQUEST_ACCEPT;
923
924 if (len < sizeof(struct ietf_mpa_v1)) {
925 i40iw_pr_err("ietf buffer small (%x)\n", len);
926 return -1;
927 }
928
929 mpa_frame = (struct ietf_mpa_v1 *)buffer;
930 mpa_hdr_len = sizeof(struct ietf_mpa_v1);
931 priv_data_len = ntohs(mpa_frame->priv_data_len);
932
933 if (priv_data_len > IETF_MAX_PRIV_DATA_LEN) {
934 i40iw_pr_err("large pri_data %d\n", priv_data_len);
935 return -1;
936 }
937 if (mpa_frame->rev != IETF_MPA_V1 && mpa_frame->rev != IETF_MPA_V2) {
938 i40iw_pr_err("unsupported mpa rev = %d\n", mpa_frame->rev);
939 return -1;
940 }
941 if (mpa_frame->rev > cm_node->mpa_frame_rev) {
942 i40iw_pr_err("rev %d\n", mpa_frame->rev);
943 return -1;
944 }
945 cm_node->mpa_frame_rev = mpa_frame->rev;
946
947 if (cm_node->state != I40IW_CM_STATE_MPAREQ_SENT) {
948 if (memcmp(mpa_frame->key, IEFT_MPA_KEY_REQ, IETF_MPA_KEY_SIZE)) {
949 i40iw_pr_err("Unexpected MPA Key received\n");
950 return -1;
951 }
952 } else {
953 if (memcmp(mpa_frame->key, IEFT_MPA_KEY_REP, IETF_MPA_KEY_SIZE)) {
954 i40iw_pr_err("Unexpected MPA Key received\n");
955 return -1;
956 }
957 }
958
959 if (priv_data_len + mpa_hdr_len > len) {
960 i40iw_pr_err("ietf buffer len(%x + %x != %x)\n",
961 priv_data_len, mpa_hdr_len, len);
962 return -1;
963 }
964 if (len > MAX_CM_BUFFER) {
965 i40iw_pr_err("ietf buffer large len = %d\n", len);
966 return -1;
967 }
968
969 switch (mpa_frame->rev) {
970 case IETF_MPA_V2:{
971 u16 ird_size;
972 u16 ord_size;
973 u16 ctrl_ord;
974 u16 ctrl_ird;
975
976 mpa_v2_frame = (struct ietf_mpa_v2 *)buffer;
977 mpa_hdr_len += IETF_RTR_MSG_SIZE;
978 rtr_msg = &mpa_v2_frame->rtr_msg;
979
980 /* parse rtr message */
981 ctrl_ord = ntohs(rtr_msg->ctrl_ord);
982 ctrl_ird = ntohs(rtr_msg->ctrl_ird);
983 ird_size = ctrl_ird & IETF_NO_IRD_ORD;
984 ord_size = ctrl_ord & IETF_NO_IRD_ORD;
985
986 if (!(ctrl_ird & IETF_PEER_TO_PEER))
987 return -1;
988
989 if (ird_size == IETF_NO_IRD_ORD || ord_size == IETF_NO_IRD_ORD) {
990 cm_node->mpav2_ird_ord = IETF_NO_IRD_ORD;
991 goto negotiate_done;
992 }
993
994 if (cm_node->state != I40IW_CM_STATE_MPAREQ_SENT) {
995 /* responder */
996 if (!ord_size && (ctrl_ord & IETF_RDMA0_READ))
997 cm_node->ird_size = 1;
998 if (cm_node->ord_size > ird_size)
999 cm_node->ord_size = ird_size;
1000 } else {
1001 /* initiator */
1002 if (!ird_size && (ctrl_ord & IETF_RDMA0_READ))
1003 return -1;
1004 if (cm_node->ord_size > ird_size)
1005 cm_node->ord_size = ird_size;
1006
1007 if (cm_node->ird_size < ord_size)
1008 /* no resources available */
1009 return -1;
1010 }
1011
1012negotiate_done:
1013 if (ctrl_ord & IETF_RDMA0_READ)
1014 cm_node->send_rdma0_op = SEND_RDMA_READ_ZERO;
1015 else if (ctrl_ord & IETF_RDMA0_WRITE)
1016 cm_node->send_rdma0_op = SEND_RDMA_WRITE_ZERO;
1017 else /* Not supported RDMA0 operation */
1018 return -1;
1019 i40iw_debug(cm_node->dev, I40IW_DEBUG_CM,
1020 "MPAV2: Negotiated ORD: %d, IRD: %d\n",
1021 cm_node->ord_size, cm_node->ird_size);
1022 break;
1023 }
1024 break;
1025 case IETF_MPA_V1:
1026 default:
1027 break;
1028 }
1029
1030 memcpy(cm_node->pdata_buf, buffer + mpa_hdr_len, priv_data_len);
1031 cm_node->pdata.size = priv_data_len;
1032
1033 if (mpa_frame->flags & IETF_MPA_FLAGS_REJECT)
1034 *type = I40IW_MPA_REQUEST_REJECT;
1035
1036 if (mpa_frame->flags & IETF_MPA_FLAGS_MARKERS)
1037 cm_node->snd_mark_en = true;
1038
1039 return 0;
1040}
1041
1042/**
1043 * i40iw_schedule_cm_timer
1044 * @@cm_node: connection's node
1045 * @sqbuf: buffer to send
1046 * @type: if it es send ot close
1047 * @send_retrans: if rexmits to be done
1048 * @close_when_complete: is cm_node to be removed
1049 *
1050 * note - cm_node needs to be protected before calling this. Encase in:
1051 * i40iw_rem_ref_cm_node(cm_core, cm_node);
1052 * i40iw_schedule_cm_timer(...)
1053 * atomic_inc(&cm_node->ref_count);
1054 */
1055int i40iw_schedule_cm_timer(struct i40iw_cm_node *cm_node,
1056 struct i40iw_puda_buf *sqbuf,
1057 enum i40iw_timer_type type,
1058 int send_retrans,
1059 int close_when_complete)
1060{
d6f7bbcc 1061 struct i40iw_sc_vsi *vsi = &cm_node->iwdev->vsi;
f27b4746
FL		 1062 struct i40iw_cm_core *cm_core = cm_node->cm_core;
1063 struct i40iw_timer_entry *new_send;
1064 int ret = 0;
1065 u32 was_timer_set;
1066 unsigned long flags;
1067
1068 new_send = kzalloc(sizeof(*new_send), GFP_ATOMIC);
1069 if (!new_send) {
d6f7bbcc 1070 i40iw_free_sqbuf(vsi, (void *)sqbuf);
f27b4746
FL		 1071 return -ENOMEM;
1072 }
1073 new_send->retrycount = I40IW_DEFAULT_RETRYS;
1074 new_send->retranscount = I40IW_DEFAULT_RETRANS;
1075 new_send->sqbuf = sqbuf;
1076 new_send->timetosend = jiffies;
1077 new_send->type = type;
1078 new_send->send_retrans = send_retrans;
1079 new_send->close_when_complete = close_when_complete;
1080
1081 if (type == I40IW_TIMER_TYPE_CLOSE) {
1082 new_send->timetosend += (HZ / 10);
1083 if (cm_node->close_entry) {
1084 kfree(new_send);
d6f7bbcc 1085 i40iw_free_sqbuf(vsi, (void *)sqbuf);
f27b4746
FL		 1086 i40iw_pr_err("already close entry\n");
1087 return -EINVAL;
1088 }
1089 cm_node->close_entry = new_send;
1090 }
1091
1092 if (type == I40IW_TIMER_TYPE_SEND) {
1093 spin_lock_irqsave(&cm_node->retrans_list_lock, flags);
1094 cm_node->send_entry = new_send;
1095 atomic_inc(&cm_node->ref_count);
1096 spin_unlock_irqrestore(&cm_node->retrans_list_lock, flags);
1097 new_send->timetosend = jiffies + I40IW_RETRY_TIMEOUT;
1098
1099 atomic_inc(&sqbuf->refcount);
d6f7bbcc 1100 i40iw_puda_send_buf(vsi->ilq, sqbuf);
f27b4746
FL		 1101 if (!send_retrans) {
1102 i40iw_cleanup_retrans_entry(cm_node);
1103 if (close_when_complete)
1104 i40iw_rem_ref_cm_node(cm_node);
1105 return ret;
1106 }
1107 }
1108
1109 spin_lock_irqsave(&cm_core->ht_lock, flags);
1110 was_timer_set = timer_pending(&cm_core->tcp_timer);
1111
1112 if (!was_timer_set) {
1113 cm_core->tcp_timer.expires = new_send->timetosend;
1114 add_timer(&cm_core->tcp_timer);
1115 }
1116 spin_unlock_irqrestore(&cm_core->ht_lock, flags);
1117
1118 return ret;
1119}
1120
1121/**
1122 * i40iw_retrans_expired - Could not rexmit the packet
1123 * @cm_node: connection's node
1124 */
1125static void i40iw_retrans_expired(struct i40iw_cm_node *cm_node)
1126{
1127 struct iw_cm_id *cm_id = cm_node->cm_id;
1128 enum i40iw_cm_node_state state = cm_node->state;
1129
1130 cm_node->state = I40IW_CM_STATE_CLOSED;
1131 switch (state) {
1132 case I40IW_CM_STATE_SYN_RCVD:
1133 case I40IW_CM_STATE_CLOSING:
1134 i40iw_rem_ref_cm_node(cm_node);
1135 break;
1136 case I40IW_CM_STATE_FIN_WAIT1:
1137 case I40IW_CM_STATE_LAST_ACK:
1138 if (cm_node->cm_id)
1139 cm_id->rem_ref(cm_id);
1140 i40iw_send_reset(cm_node);
1141 break;
1142 default:
1143 atomic_inc(&cm_node->ref_count);
1144 i40iw_send_reset(cm_node);
1145 i40iw_create_event(cm_node, I40IW_CM_EVENT_ABORTED);
1146 break;
1147 }
1148}
1149
1150/**
1151 * i40iw_handle_close_entry - for handling retry/timeouts
1152 * @cm_node: connection's node
1153 * @rem_node: flag for remove cm_node
1154 */
1155static void i40iw_handle_close_entry(struct i40iw_cm_node *cm_node, u32 rem_node)
1156{
1157 struct i40iw_timer_entry *close_entry = cm_node->close_entry;
1158 struct iw_cm_id *cm_id = cm_node->cm_id;
1159 struct i40iw_qp *iwqp;
1160 unsigned long flags;
1161
1162 if (!close_entry)
1163 return;
1164 iwqp = (struct i40iw_qp *)close_entry->sqbuf;
1165 if (iwqp) {
1166 spin_lock_irqsave(&iwqp->lock, flags);
1167 if (iwqp->cm_id) {
1168 iwqp->hw_tcp_state = I40IW_TCP_STATE_CLOSED;
1169 iwqp->hw_iwarp_state = I40IW_QP_STATE_ERROR;
1170 iwqp->last_aeq = I40IW_AE_RESET_SENT;
1171 iwqp->ibqp_state = IB_QPS_ERR;
1172 spin_unlock_irqrestore(&iwqp->lock, flags);
1173 i40iw_cm_disconn(iwqp);
1174 } else {
1175 spin_unlock_irqrestore(&iwqp->lock, flags);
1176 }
1177 } else if (rem_node) {
1178 /* TIME_WAIT state */
1179 i40iw_rem_ref_cm_node(cm_node);
1180 }
1181 if (cm_id)
1182 cm_id->rem_ref(cm_id);
1183 kfree(close_entry);
1184 cm_node->close_entry = NULL;
1185}
1186
1187/**
1188 * i40iw_cm_timer_tick - system's timer expired callback
1189 * @pass: Pointing to cm_core
1190 */
1191static void i40iw_cm_timer_tick(unsigned long pass)
1192{
1193 unsigned long nexttimeout = jiffies + I40IW_LONG_TIME;
1194 struct i40iw_cm_node *cm_node;
1195 struct i40iw_timer_entry *send_entry, *close_entry;
1196 struct list_head *list_core_temp;
d6f7bbcc 1197 struct i40iw_sc_vsi *vsi;
f27b4746
FL		 1198 struct list_head *list_node;
1199 struct i40iw_cm_core *cm_core = (struct i40iw_cm_core *)pass;
1200 u32 settimer = 0;
1201 unsigned long timetosend;
1202 struct i40iw_sc_dev *dev;
1203 unsigned long flags;
1204
1205 struct list_head timer_list;
1206
1207 INIT_LIST_HEAD(&timer_list);
1208 spin_lock_irqsave(&cm_core->ht_lock, flags);
1209
1210 list_for_each_safe(list_node, list_core_temp, &cm_core->connected_nodes) {
1211 cm_node = container_of(list_node, struct i40iw_cm_node, list);
1212 if (cm_node->close_entry || cm_node->send_entry) {
1213 atomic_inc(&cm_node->ref_count);
1214 list_add(&cm_node->timer_entry, &timer_list);
1215 }
1216 }
1217 spin_unlock_irqrestore(&cm_core->ht_lock, flags);
1218
1219 list_for_each_safe(list_node, list_core_temp, &timer_list) {
1220 cm_node = container_of(list_node,
1221 struct i40iw_cm_node,
1222 timer_entry);
1223 close_entry = cm_node->close_entry;
1224
1225 if (close_entry) {
1226 if (time_after(close_entry->timetosend, jiffies)) {
1227 if (nexttimeout > close_entry->timetosend ||
1228 !settimer) {
1229 nexttimeout = close_entry->timetosend;
1230 settimer = 1;
1231 }
1232 } else {
1233 i40iw_handle_close_entry(cm_node, 1);
1234 }
1235 }
1236
1237 spin_lock_irqsave(&cm_node->retrans_list_lock, flags);
1238
1239 send_entry = cm_node->send_entry;
1240 if (!send_entry)
1241 goto done;
1242 if (time_after(send_entry->timetosend, jiffies)) {
1243 if (cm_node->state != I40IW_CM_STATE_OFFLOADED) {
1244 if ((nexttimeout > send_entry->timetosend) ||
1245 !settimer) {
1246 nexttimeout = send_entry->timetosend;
1247 settimer = 1;
1248 }
1249 } else {
1250 i40iw_free_retrans_entry(cm_node);
1251 }
1252 goto done;
1253 }
1254
1255 if ((cm_node->state == I40IW_CM_STATE_OFFLOADED) ||
1256 (cm_node->state == I40IW_CM_STATE_CLOSED)) {
1257 i40iw_free_retrans_entry(cm_node);
1258 goto done;
1259 }
1260
1261 if (!send_entry->retranscount || !send_entry->retrycount) {
1262 i40iw_free_retrans_entry(cm_node);
1263
1264 spin_unlock_irqrestore(&cm_node->retrans_list_lock, flags);
1265 i40iw_retrans_expired(cm_node);
1266 cm_node->state = I40IW_CM_STATE_CLOSED;
1267 spin_lock_irqsave(&cm_node->retrans_list_lock, flags);
1268 goto done;
1269 }
1270 cm_node->cm_core->stats_pkt_retrans++;
1271 spin_unlock_irqrestore(&cm_node->retrans_list_lock, flags);
1272
d6f7bbcc 1273 vsi = &cm_node->iwdev->vsi;
f27b4746
FL		 1274 dev = cm_node->dev;
1275 atomic_inc(&send_entry->sqbuf->refcount);
d6f7bbcc 1276 i40iw_puda_send_buf(vsi->ilq, send_entry->sqbuf);
f27b4746
FL		 1277 spin_lock_irqsave(&cm_node->retrans_list_lock, flags);
1278 if (send_entry->send_retrans) {
1279 send_entry->retranscount--;
1280 timetosend = (I40IW_RETRY_TIMEOUT <<
1281 (I40IW_DEFAULT_RETRANS -
1282 send_entry->retranscount));
1283
1284 send_entry->timetosend = jiffies +
1285 min(timetosend, I40IW_MAX_TIMEOUT);
1286 if (nexttimeout > send_entry->timetosend || !settimer) {
1287 nexttimeout = send_entry->timetosend;
1288 settimer = 1;
1289 }
1290 } else {
1291 int close_when_complete;
1292
1293 close_when_complete = send_entry->close_when_complete;
1294 i40iw_debug(cm_node->dev,
1295 I40IW_DEBUG_CM,
1296 "cm_node=%p state=%d\n",
1297 cm_node,
1298 cm_node->state);
1299 i40iw_free_retrans_entry(cm_node);
1300 if (close_when_complete)
1301 i40iw_rem_ref_cm_node(cm_node);
1302 }
1303done:
1304 spin_unlock_irqrestore(&cm_node->retrans_list_lock, flags);
1305 i40iw_rem_ref_cm_node(cm_node);
1306 }
1307
1308 if (settimer) {
1309 spin_lock_irqsave(&cm_core->ht_lock, flags);
1310 if (!timer_pending(&cm_core->tcp_timer)) {
1311 cm_core->tcp_timer.expires = nexttimeout;
1312 add_timer(&cm_core->tcp_timer);
1313 }
1314 spin_unlock_irqrestore(&cm_core->ht_lock, flags);
1315 }
1316}
1317
1318/**
1319 * i40iw_send_syn - send SYN packet
1320 * @cm_node: connection's node
1321 * @sendack: flag to set ACK bit or not
1322 */
1323int i40iw_send_syn(struct i40iw_cm_node *cm_node, u32 sendack)
1324{
1325 struct i40iw_puda_buf *sqbuf;
1326 int flags = SET_SYN;
1327 char optionsbuffer[sizeof(struct option_mss) +
1328 sizeof(struct option_windowscale) +
1329 sizeof(struct option_base) + TCP_OPTIONS_PADDING];
1330 struct i40iw_kmem_info opts;
1331
1332 int optionssize = 0;
1333 /* Sending MSS option */
1334 union all_known_options *options;
1335
1336 opts.addr = optionsbuffer;
1337 if (!cm_node) {
1338 i40iw_pr_err("no cm_node\n");
1339 return -EINVAL;
1340 }
1341
1342 options = (union all_known_options *)&optionsbuffer[optionssize];
1343 options->as_mss.optionnum = OPTION_NUMBER_MSS;
1344 options->as_mss.length = sizeof(struct option_mss);
1345 options->as_mss.mss = htons(cm_node->tcp_cntxt.mss);
1346 optionssize += sizeof(struct option_mss);
1347
1348 options = (union all_known_options *)&optionsbuffer[optionssize];
1349 options->as_windowscale.optionnum = OPTION_NUMBER_WINDOW_SCALE;
1350 options->as_windowscale.length = sizeof(struct option_windowscale);
1351 options->as_windowscale.shiftcount = cm_node->tcp_cntxt.rcv_wscale;
1352 optionssize += sizeof(struct option_windowscale);
1353 options = (union all_known_options *)&optionsbuffer[optionssize];
1354 options->as_end = OPTION_NUMBER_END;
1355 optionssize += 1;
1356
1357 if (sendack)
1358 flags |= SET_ACK;
1359
1360 opts.size = optionssize;
1361
1362 sqbuf = i40iw_form_cm_frame(cm_node, &opts, NULL, NULL, flags);
1363 if (!sqbuf) {
1364 i40iw_pr_err("no sqbuf\n");
1365 return -1;
1366 }
1367 return i40iw_schedule_cm_timer(cm_node, sqbuf, I40IW_TIMER_TYPE_SEND, 1, 0);
1368}
1369
1370/**
1371 * i40iw_send_ack - Send ACK packet
1372 * @cm_node: connection's node
1373 */
1374static void i40iw_send_ack(struct i40iw_cm_node *cm_node)
1375{
1376 struct i40iw_puda_buf *sqbuf;
d6f7bbcc 1377 struct i40iw_sc_vsi *vsi = &cm_node->iwdev->vsi;
f27b4746
FL		 1378
1379 sqbuf = i40iw_form_cm_frame(cm_node, NULL, NULL, NULL, SET_ACK);
1380 if (sqbuf)
d6f7bbcc 1381 i40iw_puda_send_buf(vsi->ilq, sqbuf);
f27b4746
FL		 1382 else
1383 i40iw_pr_err("no sqbuf\n");
1384}
1385
1386/**
1387 * i40iw_send_fin - Send FIN pkt
1388 * @cm_node: connection's node
1389 */
1390static int i40iw_send_fin(struct i40iw_cm_node *cm_node)
1391{
1392 struct i40iw_puda_buf *sqbuf;
1393
1394 sqbuf = i40iw_form_cm_frame(cm_node, NULL, NULL, NULL, SET_ACK | SET_FIN);
1395 if (!sqbuf) {
1396 i40iw_pr_err("no sqbuf\n");
1397 return -1;
1398 }
1399 return i40iw_schedule_cm_timer(cm_node, sqbuf, I40IW_TIMER_TYPE_SEND, 1, 0);
1400}
1401
1402/**
1403 * i40iw_find_node - find a cm node that matches the reference cm node
1404 * @cm_core: cm's core
1405 * @rem_port: remote tcp port num
1406 * @rem_addr: remote ip addr
1407 * @loc_port: local tcp port num
1408 * @loc_addr: loc ip addr
1409 * @add_refcnt: flag to increment refcount of cm_node
1410 */
1411struct i40iw_cm_node *i40iw_find_node(struct i40iw_cm_core *cm_core,
1412 u16 rem_port,
1413 u32 *rem_addr,
1414 u16 loc_port,
1415 u32 *loc_addr,
1416 bool add_refcnt)
1417{
1418 struct list_head *hte;
1419 struct i40iw_cm_node *cm_node;
1420 unsigned long flags;
1421
1422 hte = &cm_core->connected_nodes;
1423
1424 /* walk list and find cm_node associated with this session ID */
1425 spin_lock_irqsave(&cm_core->ht_lock, flags);
1426 list_for_each_entry(cm_node, hte, list) {
8d8cd0bf
FL		 1427 if (!memcmp(cm_node->loc_addr, loc_addr, sizeof(cm_node->loc_addr)) &&
1428 (cm_node->loc_port == loc_port) &&
1429 !memcmp(cm_node->rem_addr, rem_addr, sizeof(cm_node->rem_addr)) &&
1430 (cm_node->rem_port == rem_port)) {
f27b4746
FL		 1431 if (add_refcnt)
1432 atomic_inc(&cm_node->ref_count);
1433 spin_unlock_irqrestore(&cm_core->ht_lock, flags);
1434 return cm_node;
1435 }
1436 }
1437 spin_unlock_irqrestore(&cm_core->ht_lock, flags);
1438
1439 /* no owner node */
1440 return NULL;
1441}
1442
1443/**
1444 * i40iw_find_listener - find a cm node listening on this addr-port pair
1445 * @cm_core: cm's core
1446 * @dst_port: listener tcp port num
1447 * @dst_addr: listener ip addr
1448 * @listener_state: state to match with listen node's
1449 */
1450static struct i40iw_cm_listener *i40iw_find_listener(
1451 struct i40iw_cm_core *cm_core,
1452 u32 *dst_addr,
1453 u16 dst_port,
1454 u16 vlan_id,
1455 enum i40iw_cm_listener_state
8d8cd0bf 1456 listener_state)
f27b4746
FL		 1457{
1458 struct i40iw_cm_listener *listen_node;
1459 static const u32 ip_zero[4] = { 0, 0, 0, 0 };
1460 u32 listen_addr[4];
1461 u16 listen_port;
1462 unsigned long flags;
1463
1464 /* walk list and find cm_node associated with this session ID */
1465 spin_lock_irqsave(&cm_core->listen_list_lock, flags);
1466 list_for_each_entry(listen_node, &cm_core->listen_nodes, list) {
8d8cd0bf
FL		 1467 memcpy(listen_addr, listen_node->loc_addr, sizeof(listen_addr));
1468 listen_port = listen_node->loc_port;
f27b4746
FL		 1469 /* compare node pair, return node handle if a match */
1470 if ((!memcmp(listen_addr, dst_addr, sizeof(listen_addr)) ||
1471 !memcmp(listen_addr, ip_zero, sizeof(listen_addr))) &&
1472 (listen_port == dst_port) &&
1473 (listener_state & listen_node->listener_state)) {
1474 atomic_inc(&listen_node->ref_count);
1475 spin_unlock_irqrestore(&cm_core->listen_list_lock, flags);
1476 return listen_node;
1477 }
1478 }
1479 spin_unlock_irqrestore(&cm_core->listen_list_lock, flags);
1480 return NULL;
1481}
1482
1483/**
1484 * i40iw_add_hte_node - add a cm node to the hash table
1485 * @cm_core: cm's core
1486 * @cm_node: connection's node
1487 */
1488static void i40iw_add_hte_node(struct i40iw_cm_core *cm_core,
1489 struct i40iw_cm_node *cm_node)
1490{
1491 struct list_head *hte;
1492 unsigned long flags;
1493
1494 if (!cm_node || !cm_core) {
1495 i40iw_pr_err("cm_node or cm_core == NULL\n");
1496 return;
1497 }
1498 spin_lock_irqsave(&cm_core->ht_lock, flags);
1499
1500 /* get a handle on the hash table element (list head for this slot) */
1501 hte = &cm_core->connected_nodes;
1502 list_add_tail(&cm_node->list, hte);
1503 spin_unlock_irqrestore(&cm_core->ht_lock, flags);
1504}
1505
1506/**
1507 * listen_port_in_use - determine if port is in use
1508 * @port: Listen port number
1509 */
1510static bool i40iw_listen_port_in_use(struct i40iw_cm_core *cm_core, u16 port)
1511{
1512 struct i40iw_cm_listener *listen_node;
1513 unsigned long flags;
1514 bool ret = false;
1515
1516 spin_lock_irqsave(&cm_core->listen_list_lock, flags);
1517 list_for_each_entry(listen_node, &cm_core->listen_nodes, list) {
8d8cd0bf 1518 if (listen_node->loc_port == port) {
f27b4746
FL		 1519 ret = true;
1520 break;
1521 }
1522 }
1523 spin_unlock_irqrestore(&cm_core->listen_list_lock, flags);
1524 return ret;
1525}
1526
1527/**
1528 * i40iw_del_multiple_qhash - Remove qhash and child listens
1529 * @iwdev: iWarp device
1530 * @cm_info: CM info for parent listen node
1531 * @cm_parent_listen_node: The parent listen node
1532 */
1533static enum i40iw_status_code i40iw_del_multiple_qhash(
1534 struct i40iw_device *iwdev,
1535 struct i40iw_cm_info *cm_info,
1536 struct i40iw_cm_listener *cm_parent_listen_node)
1537{
1538 struct i40iw_cm_listener *child_listen_node;
1539 enum i40iw_status_code ret = I40IW_ERR_CONFIG;
1540 struct list_head *pos, *tpos;
1541 unsigned long flags;
1542
1543 spin_lock_irqsave(&iwdev->cm_core.listen_list_lock, flags);
1544 list_for_each_safe(pos, tpos, &cm_parent_listen_node->child_listen_list) {
1545 child_listen_node = list_entry(pos, struct i40iw_cm_listener, child_listen_list);
1546 if (child_listen_node->ipv4)
1547 i40iw_debug(&iwdev->sc_dev,
1548 I40IW_DEBUG_CM,
1549 "removing child listen for IP=%pI4, port=%d, vlan=%d\n",
1550 child_listen_node->loc_addr,
1551 child_listen_node->loc_port,
1552 child_listen_node->vlan_id);
1553 else
1554 i40iw_debug(&iwdev->sc_dev, I40IW_DEBUG_CM,
1555 "removing child listen for IP=%pI6, port=%d, vlan=%d\n",
1556 child_listen_node->loc_addr,
1557 child_listen_node->loc_port,
1558 child_listen_node->vlan_id);
1559 list_del(pos);
f27b4746
FL		 1560 memcpy(cm_info->loc_addr, child_listen_node->loc_addr,
1561 sizeof(cm_info->loc_addr));
1562 cm_info->vlan_id = child_listen_node->vlan_id;
e5e74b61
MI		 1563 if (child_listen_node->qhash_set) {
1564 ret = i40iw_manage_qhash(iwdev, cm_info,
1565 I40IW_QHASH_TYPE_TCP_SYN,
1566 I40IW_QHASH_MANAGE_TYPE_DELETE,
1567 NULL, false);
1568 child_listen_node->qhash_set = false;
1569 } else {
1570 ret = I40IW_SUCCESS;
1571 }
f27b4746
FL		 1572 i40iw_debug(&iwdev->sc_dev,
1573 I40IW_DEBUG_CM,
1574 "freed pointer = %p\n",
1575 child_listen_node);
5ec11ed2
MI		 1576 kfree(child_listen_node);
1577 cm_parent_listen_node->cm_core->stats_listen_nodes_destroyed++;
f27b4746
FL		 1578 }
1579 spin_unlock_irqrestore(&iwdev->cm_core.listen_list_lock, flags);
1580
1581 return ret;
1582}
1583
1584/**
1585 * i40iw_netdev_vlan_ipv6 - Gets the netdev and mac
1586 * @addr: local IPv6 address
1587 * @vlan_id: vlan id for the given IPv6 address
1588 * @mac: mac address for the given IPv6 address
1589 *
1590 * Returns the net_device of the IPv6 address and also sets the
1591 * vlan id and mac for that address.
1592 */
1593static struct net_device *i40iw_netdev_vlan_ipv6(u32 *addr, u16 *vlan_id, u8 *mac)
1594{
1595 struct net_device *ip_dev = NULL;
f27b4746
FL		 1596 struct in6_addr laddr6;
1597
5ebcb0ff
HO		 1598 if (!IS_ENABLED(CONFIG_IPV6))
1599 return NULL;
f27b4746
FL		 1600 i40iw_copy_ip_htonl(laddr6.in6_u.u6_addr32, addr);
1601 if (vlan_id)
1602 *vlan_id = I40IW_NO_VLAN;
1603 if (mac)
1604 eth_zero_addr(mac);
1605 rcu_read_lock();
1606 for_each_netdev_rcu(&init_net, ip_dev) {
1607 if (ipv6_chk_addr(&init_net, &laddr6, ip_dev, 1)) {
1608 if (vlan_id)
1609 *vlan_id = rdma_vlan_dev_vlan_id(ip_dev);
1610 if (ip_dev->dev_addr && mac)
1611 ether_addr_copy(mac, ip_dev->dev_addr);
1612 break;
1613 }
1614 }
1615 rcu_read_unlock();
f27b4746
FL		 1616 return ip_dev;
1617}
1618
1619/**
1620 * i40iw_get_vlan_ipv4 - Returns the vlan_id for IPv4 address
1621 * @addr: local IPv4 address
1622 */
1623static u16 i40iw_get_vlan_ipv4(u32 *addr)
1624{
1625 struct net_device *netdev;
1626 u16 vlan_id = I40IW_NO_VLAN;
1627
1628 netdev = ip_dev_find(&init_net, htonl(addr[0]));
1629 if (netdev) {
1630 vlan_id = rdma_vlan_dev_vlan_id(netdev);
1631 dev_put(netdev);
1632 }
1633 return vlan_id;
1634}
1635
1636/**
1637 * i40iw_add_mqh_6 - Adds multiple qhashes for IPv6
1638 * @iwdev: iWarp device
1639 * @cm_info: CM info for parent listen node
1640 * @cm_parent_listen_node: The parent listen node
1641 *
1642 * Adds a qhash and a child listen node for every IPv6 address
1643 * on the adapter and adds the associated qhash filter
1644 */
1645static enum i40iw_status_code i40iw_add_mqh_6(struct i40iw_device *iwdev,
1646 struct i40iw_cm_info *cm_info,
1647 struct i40iw_cm_listener *cm_parent_listen_node)
1648{
1649 struct net_device *ip_dev;
1650 struct inet6_dev *idev;
a05e1513 1651 struct inet6_ifaddr *ifp, *tmp;
f27b4746
FL		 1652 enum i40iw_status_code ret = 0;
1653 struct i40iw_cm_listener *child_listen_node;
1654 unsigned long flags;
1655
1656 rtnl_lock();
1657 for_each_netdev_rcu(&init_net, ip_dev) {
1658 if ((((rdma_vlan_dev_vlan_id(ip_dev) < I40IW_NO_VLAN) &&
1659 (rdma_vlan_dev_real_dev(ip_dev) == iwdev->netdev)) ||
1660 (ip_dev == iwdev->netdev)) && (ip_dev->flags & IFF_UP)) {
1661 idev = __in6_dev_get(ip_dev);
1662 if (!idev) {
1663 i40iw_pr_err("idev == NULL\n");
1664 break;
1665 }
a05e1513 1666 list_for_each_entry_safe(ifp, tmp, &idev->addr_list, if_list) {
f27b4746
FL		 1667 i40iw_debug(&iwdev->sc_dev,
1668 I40IW_DEBUG_CM,
1669 "IP=%pI6, vlan_id=%d, MAC=%pM\n",
1670 &ifp->addr,
1671 rdma_vlan_dev_vlan_id(ip_dev),
1672 ip_dev->dev_addr);
1673 child_listen_node =
1674 kzalloc(sizeof(*child_listen_node), GFP_ATOMIC);
1675 i40iw_debug(&iwdev->sc_dev,
1676 I40IW_DEBUG_CM,
1677 "Allocating child listener %p\n",
1678 child_listen_node);
1679 if (!child_listen_node) {
f27b4746
FL		 1680 ret = I40IW_ERR_NO_MEMORY;
1681 goto exit;
1682 }
1683 cm_info->vlan_id = rdma_vlan_dev_vlan_id(ip_dev);
1684 cm_parent_listen_node->vlan_id = cm_info->vlan_id;
1685
1686 memcpy(child_listen_node, cm_parent_listen_node,
1687 sizeof(*child_listen_node));
1688
1689 i40iw_copy_ip_ntohl(child_listen_node->loc_addr,
1690 ifp->addr.in6_u.u6_addr32);
f27b4746
FL		 1691 memcpy(cm_info->loc_addr, child_listen_node->loc_addr,
1692 sizeof(cm_info->loc_addr));
1693
1694 ret = i40iw_manage_qhash(iwdev, cm_info,
1695 I40IW_QHASH_TYPE_TCP_SYN,
1696 I40IW_QHASH_MANAGE_TYPE_ADD,
1697 NULL, true);
1698 if (!ret) {
e5e74b61 1699 child_listen_node->qhash_set = true;
f27b4746
FL		 1700 spin_lock_irqsave(&iwdev->cm_core.listen_list_lock, flags);
1701 list_add(&child_listen_node->child_listen_list,
1702 &cm_parent_listen_node->child_listen_list);
1703 spin_unlock_irqrestore(&iwdev->cm_core.listen_list_lock, flags);
1704 cm_parent_listen_node->cm_core->stats_listen_nodes_created++;
1705 } else {
1706 kfree(child_listen_node);
1707 }
1708 }
1709 }
1710 }
1711exit:
1712 rtnl_unlock();
1713 return ret;
1714}
1715
1716/**
1717 * i40iw_add_mqh_4 - Adds multiple qhashes for IPv4
1718 * @iwdev: iWarp device
1719 * @cm_info: CM info for parent listen node
1720 * @cm_parent_listen_node: The parent listen node
1721 *
1722 * Adds a qhash and a child listen node for every IPv4 address
1723 * on the adapter and adds the associated qhash filter
1724 */
1725static enum i40iw_status_code i40iw_add_mqh_4(
1726 struct i40iw_device *iwdev,
1727 struct i40iw_cm_info *cm_info,
1728 struct i40iw_cm_listener *cm_parent_listen_node)
1729{
1730 struct net_device *dev;
1731 struct in_device *idev;
1732 struct i40iw_cm_listener *child_listen_node;
1733 enum i40iw_status_code ret = 0;
1734 unsigned long flags;
1735
1736 rtnl_lock();
1737 for_each_netdev(&init_net, dev) {
1738 if ((((rdma_vlan_dev_vlan_id(dev) < I40IW_NO_VLAN) &&
1739 (rdma_vlan_dev_real_dev(dev) == iwdev->netdev)) ||
1740 (dev == iwdev->netdev)) && (dev->flags & IFF_UP)) {
1741 idev = in_dev_get(dev);
1742 for_ifa(idev) {
1743 i40iw_debug(&iwdev->sc_dev,
1744 I40IW_DEBUG_CM,
1745 "Allocating child CM Listener forIP=%pI4, vlan_id=%d, MAC=%pM\n",
1746 &ifa->ifa_address,
1747 rdma_vlan_dev_vlan_id(dev),
1748 dev->dev_addr);
1749 child_listen_node = kzalloc(sizeof(*child_listen_node), GFP_ATOMIC);
1750 cm_parent_listen_node->cm_core->stats_listen_nodes_created++;
1751 i40iw_debug(&iwdev->sc_dev,
1752 I40IW_DEBUG_CM,
1753 "Allocating child listener %p\n",
1754 child_listen_node);
1755 if (!child_listen_node) {
f27b4746
FL		 1756 in_dev_put(idev);
1757 ret = I40IW_ERR_NO_MEMORY;
1758 goto exit;
1759 }
1760 cm_info->vlan_id = rdma_vlan_dev_vlan_id(dev);
1761 cm_parent_listen_node->vlan_id = cm_info->vlan_id;
1762 memcpy(child_listen_node,
1763 cm_parent_listen_node,
1764 sizeof(*child_listen_node));
1765
1766 child_listen_node->loc_addr[0] = ntohl(ifa->ifa_address);
f27b4746
FL		 1767 memcpy(cm_info->loc_addr, child_listen_node->loc_addr,
1768 sizeof(cm_info->loc_addr));
1769
1770 ret = i40iw_manage_qhash(iwdev,
1771 cm_info,
1772 I40IW_QHASH_TYPE_TCP_SYN,
1773 I40IW_QHASH_MANAGE_TYPE_ADD,
1774 NULL,
1775 true);
1776 if (!ret) {
e5e74b61 1777 child_listen_node->qhash_set = true;
f27b4746
FL		 1778 spin_lock_irqsave(&iwdev->cm_core.listen_list_lock, flags);
1779 list_add(&child_listen_node->child_listen_list,
1780 &cm_parent_listen_node->child_listen_list);
1781 spin_unlock_irqrestore(&iwdev->cm_core.listen_list_lock, flags);
1782 } else {
1783 kfree(child_listen_node);
1784 cm_parent_listen_node->cm_core->stats_listen_nodes_created--;
1785 }
1786 }
1787 endfor_ifa(idev);
1788 in_dev_put(idev);
1789 }
1790 }
1791exit:
1792 rtnl_unlock();
1793 return ret;
1794}
1795
1796/**
1797 * i40iw_dec_refcnt_listen - delete listener and associated cm nodes
1798 * @cm_core: cm's core
1799 * @free_hanging_nodes: to free associated cm_nodes
1800 * @apbvt_del: flag to delete the apbvt
1801 */
1802static int i40iw_dec_refcnt_listen(struct i40iw_cm_core *cm_core,
1803 struct i40iw_cm_listener *listener,
1804 int free_hanging_nodes, bool apbvt_del)
1805{
1806 int ret = -EINVAL;
1807 int err = 0;
1808 struct list_head *list_pos;
1809 struct list_head *list_temp;
1810 struct i40iw_cm_node *cm_node;
1811 struct list_head reset_list;
1812 struct i40iw_cm_info nfo;
1813 struct i40iw_cm_node *loopback;
1814 enum i40iw_cm_node_state old_state;
1815 unsigned long flags;
1816
1817 /* free non-accelerated child nodes for this listener */
1818 INIT_LIST_HEAD(&reset_list);
1819 if (free_hanging_nodes) {
1820 spin_lock_irqsave(&cm_core->ht_lock, flags);
1821 list_for_each_safe(list_pos, list_temp, &cm_core->connected_nodes) {
1822 cm_node = container_of(list_pos, struct i40iw_cm_node, list);
1823 if ((cm_node->listener == listener) && !cm_node->accelerated) {
1824 atomic_inc(&cm_node->ref_count);
1825 list_add(&cm_node->reset_entry, &reset_list);
1826 }
1827 }
1828 spin_unlock_irqrestore(&cm_core->ht_lock, flags);
1829 }
1830
1831 list_for_each_safe(list_pos, list_temp, &reset_list) {
1832 cm_node = container_of(list_pos, struct i40iw_cm_node, reset_entry);
1833 loopback = cm_node->loopbackpartner;
1834 if (cm_node->state >= I40IW_CM_STATE_FIN_WAIT1) {
1835 i40iw_rem_ref_cm_node(cm_node);
1836 } else {
1837 if (!loopback) {
1838 i40iw_cleanup_retrans_entry(cm_node);
1839 err = i40iw_send_reset(cm_node);
1840 if (err) {
1841 cm_node->state = I40IW_CM_STATE_CLOSED;
1842 i40iw_pr_err("send reset\n");
1843 } else {
1844 old_state = cm_node->state;
1845 cm_node->state = I40IW_CM_STATE_LISTENER_DESTROYED;
1846 if (old_state != I40IW_CM_STATE_MPAREQ_RCVD)
1847 i40iw_rem_ref_cm_node(cm_node);
1848 }
1849 } else {
1850 struct i40iw_cm_event event;
1851
1852 event.cm_node = loopback;
1853 memcpy(event.cm_info.rem_addr,
1854 loopback->rem_addr, sizeof(event.cm_info.rem_addr));
1855 memcpy(event.cm_info.loc_addr,
1856 loopback->loc_addr, sizeof(event.cm_info.loc_addr));
1857 event.cm_info.rem_port = loopback->rem_port;
1858 event.cm_info.loc_port = loopback->loc_port;
1859 event.cm_info.cm_id = loopback->cm_id;
1860 event.cm_info.ipv4 = loopback->ipv4;
1861 atomic_inc(&loopback->ref_count);
1862 loopback->state = I40IW_CM_STATE_CLOSED;
1863 i40iw_event_connect_error(&event);
1864 cm_node->state = I40IW_CM_STATE_LISTENER_DESTROYED;
1865 i40iw_rem_ref_cm_node(cm_node);
1866 }
1867 }
1868 }
1869
1870 if (!atomic_dec_return(&listener->ref_count)) {
1871 spin_lock_irqsave(&cm_core->listen_list_lock, flags);
1872 list_del(&listener->list);
1873 spin_unlock_irqrestore(&cm_core->listen_list_lock, flags);
1874
1875 if (listener->iwdev) {
8d8cd0bf 1876 if (apbvt_del && !i40iw_listen_port_in_use(cm_core, listener->loc_port))
f27b4746 1877 i40iw_manage_apbvt(listener->iwdev,
8d8cd0bf 1878 listener->loc_port,
f27b4746
FL		 1879 I40IW_MANAGE_APBVT_DEL);
1880
1881 memcpy(nfo.loc_addr, listener->loc_addr, sizeof(nfo.loc_addr));
f27b4746 1882 nfo.loc_port = listener->loc_port;
f27b4746
FL		 1883 nfo.ipv4 = listener->ipv4;
1884 nfo.vlan_id = listener->vlan_id;
0fc2dc58 1885 nfo.user_pri = listener->user_pri;
f27b4746 1886
f27b4746
FL		 1887 if (!list_empty(&listener->child_listen_list)) {
1888 i40iw_del_multiple_qhash(listener->iwdev, &nfo, listener);
1889 } else {
1890 if (listener->qhash_set)
1891 i40iw_manage_qhash(listener->iwdev,
1892 &nfo,
1893 I40IW_QHASH_TYPE_TCP_SYN,
1894 I40IW_QHASH_MANAGE_TYPE_DELETE,
1895 NULL,
1896 false);
1897 }
1898 }
1899
1900 cm_core->stats_listen_destroyed++;
1901 kfree(listener);
1902 cm_core->stats_listen_nodes_destroyed++;
1903 listener = NULL;
1904 ret = 0;
1905 }
1906
1907 if (listener) {
1908 if (atomic_read(&listener->pend_accepts_cnt) > 0)
1909 i40iw_debug(cm_core->dev,
1910 I40IW_DEBUG_CM,
1911 "%s: listener (%p) pending accepts=%u\n",
1912 __func__,
1913 listener,
1914 atomic_read(&listener->pend_accepts_cnt));
1915 }
1916
1917 return ret;
1918}
1919
1920/**
1921 * i40iw_cm_del_listen - delete a linstener
1922 * @cm_core: cm's core
1923 * @listener: passive connection's listener
1924 * @apbvt_del: flag to delete apbvt
1925 */
1926static int i40iw_cm_del_listen(struct i40iw_cm_core *cm_core,
1927 struct i40iw_cm_listener *listener,
1928 bool apbvt_del)
1929{
1930 listener->listener_state = I40IW_CM_LISTENER_PASSIVE_STATE;
1931 listener->cm_id = NULL; /* going to be destroyed pretty soon */
1932 return i40iw_dec_refcnt_listen(cm_core, listener, 1, apbvt_del);
1933}
1934
1935/**
1936 * i40iw_addr_resolve_neigh - resolve neighbor address
1937 * @iwdev: iwarp device structure
1938 * @src_ip: local ip address
1939 * @dst_ip: remote ip address
1940 * @arpindex: if there is an arp entry
1941 */
1942static int i40iw_addr_resolve_neigh(struct i40iw_device *iwdev,
1943 u32 src_ip,
1944 u32 dst_ip,
1945 int arpindex)
1946{
1947 struct rtable *rt;
1948 struct neighbour *neigh;
1949 int rc = arpindex;
1950 struct net_device *netdev = iwdev->netdev;
1951 __be32 dst_ipaddr = htonl(dst_ip);
1952 __be32 src_ipaddr = htonl(src_ip);
1953
1954 rt = ip_route_output(&init_net, dst_ipaddr, src_ipaddr, 0, 0);
1955 if (IS_ERR(rt)) {
1956 i40iw_pr_err("ip_route_output\n");
1957 return rc;
1958 }
1959
1960 if (netif_is_bond_slave(netdev))
1961 netdev = netdev_master_upper_dev_get(netdev);
1962
1963 neigh = dst_neigh_lookup(&rt->dst, &dst_ipaddr);
1964
1965 rcu_read_lock();
1966 if (neigh) {
1967 if (neigh->nud_state & NUD_VALID) {
1968 if (arpindex >= 0) {
1969 if (ether_addr_equal(iwdev->arp_table[arpindex].mac_addr,
1970 neigh->ha))
1971 /* Mac address same as arp table */
1972 goto resolve_neigh_exit;
1973 i40iw_manage_arp_cache(iwdev,
1974 iwdev->arp_table[arpindex].mac_addr,
1975 &dst_ip,
1976 true,
1977 I40IW_ARP_DELETE);
1978 }
1979
1980 i40iw_manage_arp_cache(iwdev, neigh->ha, &dst_ip, true, I40IW_ARP_ADD);
1981 rc = i40iw_arp_table(iwdev, &dst_ip, true, NULL, I40IW_ARP_RESOLVE);
1982 } else {
1983 neigh_event_send(neigh, NULL);
1984 }
1985 }
1986 resolve_neigh_exit:
1987
1988 rcu_read_unlock();
1989 if (neigh)
1990 neigh_release(neigh);
1991
1992 ip_rt_put(rt);
1993 return rc;
1994}
1995
1996/**
1997 * i40iw_get_dst_ipv6
1998 */
f27b4746
FL		 1999static struct dst_entry *i40iw_get_dst_ipv6(struct sockaddr_in6 *src_addr,
2000 struct sockaddr_in6 *dst_addr)
2001{
2002 struct dst_entry *dst;
2003 struct flowi6 fl6;
2004
2005 memset(&fl6, 0, sizeof(fl6));
2006 fl6.daddr = dst_addr->sin6_addr;
2007 fl6.saddr = src_addr->sin6_addr;
2008 if (ipv6_addr_type(&fl6.daddr) & IPV6_ADDR_LINKLOCAL)
2009 fl6.flowi6_oif = dst_addr->sin6_scope_id;
2010
2011 dst = ip6_route_output(&init_net, NULL, &fl6);
2012 return dst;
2013}
f27b4746
FL		 2014
2015/**
2016 * i40iw_addr_resolve_neigh_ipv6 - resolve neighbor ipv6 address
2017 * @iwdev: iwarp device structure
2018 * @dst_ip: remote ip address
2019 * @arpindex: if there is an arp entry
2020 */
f27b4746
FL		 2021static int i40iw_addr_resolve_neigh_ipv6(struct i40iw_device *iwdev,
2022 u32 *src,
2023 u32 *dest,
2024 int arpindex)
2025{
2026 struct neighbour *neigh;
2027 int rc = arpindex;
2028 struct net_device *netdev = iwdev->netdev;
2029 struct dst_entry *dst;
2030 struct sockaddr_in6 dst_addr;
2031 struct sockaddr_in6 src_addr;
2032
2033 memset(&dst_addr, 0, sizeof(dst_addr));
2034 dst_addr.sin6_family = AF_INET6;
2035 i40iw_copy_ip_htonl(dst_addr.sin6_addr.in6_u.u6_addr32, dest);
2036 memset(&src_addr, 0, sizeof(src_addr));
2037 src_addr.sin6_family = AF_INET6;
2038 i40iw_copy_ip_htonl(src_addr.sin6_addr.in6_u.u6_addr32, src);
2039 dst = i40iw_get_dst_ipv6(&src_addr, &dst_addr);
2040 if (!dst || dst->error) {
2041 if (dst) {
2042 dst_release(dst);
2043 i40iw_pr_err("ip6_route_output returned dst->error = %d\n",
2044 dst->error);
2045 }
2046 return rc;
2047 }
2048
2049 if (netif_is_bond_slave(netdev))
2050 netdev = netdev_master_upper_dev_get(netdev);
2051
2052 neigh = dst_neigh_lookup(dst, &dst_addr);
2053
2054 rcu_read_lock();
2055 if (neigh) {
2056 i40iw_debug(&iwdev->sc_dev, I40IW_DEBUG_CM, "dst_neigh_lookup MAC=%pM\n", neigh->ha);
2057 if (neigh->nud_state & NUD_VALID) {
2058 if (arpindex >= 0) {
2059 if (ether_addr_equal
2060 (iwdev->arp_table[arpindex].mac_addr,
2061 neigh->ha)) {
2062 /* Mac address same as in arp table */
2063 goto resolve_neigh_exit6;
2064 }
2065 i40iw_manage_arp_cache(iwdev,
2066 iwdev->arp_table[arpindex].mac_addr,
2067 dest,
2068 false,
2069 I40IW_ARP_DELETE);
2070 }
2071 i40iw_manage_arp_cache(iwdev,
2072 neigh->ha,
2073 dest,
2074 false,
2075 I40IW_ARP_ADD);
2076 rc = i40iw_arp_table(iwdev,
2077 dest,
2078 false,
2079 NULL,
2080 I40IW_ARP_RESOLVE);
2081 } else {
2082 neigh_event_send(neigh, NULL);
2083 }
2084 }
2085
2086 resolve_neigh_exit6:
2087 rcu_read_unlock();
2088 if (neigh)
2089 neigh_release(neigh);
2090 dst_release(dst);
2091 return rc;
2092}
f27b4746
FL		 2093
2094/**
2095 * i40iw_ipv4_is_loopback - check if loopback
2096 * @loc_addr: local addr to compare
2097 * @rem_addr: remote address
2098 */
2099static bool i40iw_ipv4_is_loopback(u32 loc_addr, u32 rem_addr)
2100{
2101 return ipv4_is_loopback(htonl(rem_addr)) || (loc_addr == rem_addr);
2102}
2103
2104/**
2105 * i40iw_ipv6_is_loopback - check if loopback
2106 * @loc_addr: local addr to compare
2107 * @rem_addr: remote address
2108 */
2109static bool i40iw_ipv6_is_loopback(u32 *loc_addr, u32 *rem_addr)
2110{
2111 struct in6_addr raddr6;
2112
2113 i40iw_copy_ip_htonl(raddr6.in6_u.u6_addr32, rem_addr);
f606d893 2114 return !memcmp(loc_addr, rem_addr, 16) || ipv6_addr_loopback(&raddr6);
f27b4746
FL		 2115}
2116
2117/**
2118 * i40iw_make_cm_node - create a new instance of a cm node
2119 * @cm_core: cm's core
2120 * @iwdev: iwarp device structure
2121 * @cm_info: quad info for connection
2122 * @listener: passive connection's listener
2123 */
2124static struct i40iw_cm_node *i40iw_make_cm_node(
2125 struct i40iw_cm_core *cm_core,
2126 struct i40iw_device *iwdev,
2127 struct i40iw_cm_info *cm_info,
2128 struct i40iw_cm_listener *listener)
2129{
2130 struct i40iw_cm_node *cm_node;
2131 struct timespec ts;
2132 int oldarpindex;
2133 int arpindex;
2134 struct net_device *netdev = iwdev->netdev;
2135
2136 /* create an hte and cm_node for this instance */
2137 cm_node = kzalloc(sizeof(*cm_node), GFP_ATOMIC);
2138 if (!cm_node)
2139 return NULL;
2140
2141 /* set our node specific transport info */
2142 cm_node->ipv4 = cm_info->ipv4;
2143 cm_node->vlan_id = cm_info->vlan_id;
0fc2dc58
HO		 2144 if ((cm_node->vlan_id == I40IW_NO_VLAN) && iwdev->dcb)
2145 cm_node->vlan_id = 0;
7eb2bde7 2146 cm_node->tos = cm_info->tos;
0fc2dc58 2147 cm_node->user_pri = cm_info->user_pri;
7eb2bde7
SS		 2148 if (listener) {
2149 if (listener->tos != cm_info->tos)
2150 i40iw_debug(&iwdev->sc_dev, I40IW_DEBUG_DCB,
2151 "application TOS[%d] and remote client TOS[%d] mismatch\n",
2152 listener->tos, cm_info->tos);
2153 cm_node->tos = max(listener->tos, cm_info->tos);
2154 cm_node->user_pri = rt_tos2priority(cm_node->tos);
2155 i40iw_debug(&iwdev->sc_dev, I40IW_DEBUG_DCB, "listener: TOS:[%d] UP:[%d]\n",
2156 cm_node->tos, cm_node->user_pri);
2157 }
f27b4746
FL		 2158 memcpy(cm_node->loc_addr, cm_info->loc_addr, sizeof(cm_node->loc_addr));
2159 memcpy(cm_node->rem_addr, cm_info->rem_addr, sizeof(cm_node->rem_addr));
f27b4746
FL		 2160 cm_node->loc_port = cm_info->loc_port;
2161 cm_node->rem_port = cm_info->rem_port;
f27b4746
FL		 2162
2163 cm_node->mpa_frame_rev = iwdev->mpa_version;
2164 cm_node->send_rdma0_op = SEND_RDMA_READ_ZERO;
2165 cm_node->ird_size = I40IW_MAX_IRD_SIZE;
2166 cm_node->ord_size = I40IW_MAX_ORD_SIZE;
2167
2168 cm_node->listener = listener;
2169 cm_node->cm_id = cm_info->cm_id;
2170 ether_addr_copy(cm_node->loc_mac, netdev->dev_addr);
2171 spin_lock_init(&cm_node->retrans_list_lock);
2172
2173 atomic_set(&cm_node->ref_count, 1);
2174 /* associate our parent CM core */
2175 cm_node->cm_core = cm_core;
2176 cm_node->tcp_cntxt.loc_id = I40IW_CM_DEF_LOCAL_ID;
2177 cm_node->tcp_cntxt.rcv_wscale = I40IW_CM_DEFAULT_RCV_WND_SCALE;
2178 cm_node->tcp_cntxt.rcv_wnd =
2179 I40IW_CM_DEFAULT_RCV_WND_SCALED >> I40IW_CM_DEFAULT_RCV_WND_SCALE;
2180 ts = current_kernel_time();
20c61f7e 2181 cm_node->tcp_cntxt.loc_seq_num = ts.tv_nsec;
d6f7bbcc 2182 cm_node->tcp_cntxt.mss = iwdev->vsi.mss;
f27b4746
FL		 2183
2184 cm_node->iwdev = iwdev;
2185 cm_node->dev = &iwdev->sc_dev;
2186
2187 if ((cm_node->ipv4 &&
2188 i40iw_ipv4_is_loopback(cm_node->loc_addr[0], cm_node->rem_addr[0])) ||
2189 (!cm_node->ipv4 && i40iw_ipv6_is_loopback(cm_node->loc_addr,
2190 cm_node->rem_addr))) {
2191 arpindex = i40iw_arp_table(iwdev,
8d8cd0bf 2192 cm_node->rem_addr,
f27b4746
FL		 2193 false,
2194 NULL,
2195 I40IW_ARP_RESOLVE);
2196 } else {
2197 oldarpindex = i40iw_arp_table(iwdev,
8d8cd0bf 2198 cm_node->rem_addr,
f27b4746
FL		 2199 false,
2200 NULL,
2201 I40IW_ARP_RESOLVE);
2202 if (cm_node->ipv4)
2203 arpindex = i40iw_addr_resolve_neigh(iwdev,
8d8cd0bf
FL		 2204 cm_info->loc_addr[0],
2205 cm_info->rem_addr[0],
f27b4746 2206 oldarpindex);
2fe78571 2207 else if (IS_ENABLED(CONFIG_IPV6))
f27b4746 2208 arpindex = i40iw_addr_resolve_neigh_ipv6(iwdev,
8d8cd0bf
FL		 2209 cm_info->loc_addr,
2210 cm_info->rem_addr,
f27b4746 2211 oldarpindex);
2fe78571
AB		 2212 else
2213 arpindex = -EINVAL;
f27b4746
FL		 2214 }
2215 if (arpindex < 0) {
2216 i40iw_pr_err("cm_node arpindex\n");
2217 kfree(cm_node);
2218 return NULL;
2219 }
2220 ether_addr_copy(cm_node->rem_mac, iwdev->arp_table[arpindex].mac_addr);
2221 i40iw_add_hte_node(cm_core, cm_node);
2222 cm_core->stats_nodes_created++;
2223 return cm_node;
2224}
2225
2226/**
2227 * i40iw_rem_ref_cm_node - destroy an instance of a cm node
2228 * @cm_node: connection's node
2229 */
2230static void i40iw_rem_ref_cm_node(struct i40iw_cm_node *cm_node)
2231{
2232 struct i40iw_cm_core *cm_core = cm_node->cm_core;
2233 struct i40iw_qp *iwqp;
2234 struct i40iw_cm_info nfo;
2235 unsigned long flags;
2236
2237 spin_lock_irqsave(&cm_node->cm_core->ht_lock, flags);
2238 if (atomic_dec_return(&cm_node->ref_count)) {
2239 spin_unlock_irqrestore(&cm_node->cm_core->ht_lock, flags);
2240 return;
2241 }
2242 list_del(&cm_node->list);
2243 spin_unlock_irqrestore(&cm_node->cm_core->ht_lock, flags);
2244
2245 /* if the node is destroyed before connection was accelerated */
2246 if (!cm_node->accelerated && cm_node->accept_pend) {
2247 pr_err("node destroyed before established\n");
2248 atomic_dec(&cm_node->listener->pend_accepts_cnt);
2249 }
2250 if (cm_node->close_entry)
2251 i40iw_handle_close_entry(cm_node, 0);
2252 if (cm_node->listener) {
2253 i40iw_dec_refcnt_listen(cm_core, cm_node->listener, 0, true);
2254 } else {
20c61f7e 2255 if (!i40iw_listen_port_in_use(cm_core, cm_node->loc_port) &&
1ad19f73 2256 cm_node->apbvt_set) {
f27b4746 2257 i40iw_manage_apbvt(cm_node->iwdev,
8d8cd0bf 2258 cm_node->loc_port,
f27b4746
FL		 2259 I40IW_MANAGE_APBVT_DEL);
2260 i40iw_get_addr_info(cm_node, &nfo);
f27b4746
FL		 2261 if (cm_node->qhash_set) {
2262 i40iw_manage_qhash(cm_node->iwdev,
2263 &nfo,
2264 I40IW_QHASH_TYPE_TCP_ESTABLISHED,
2265 I40IW_QHASH_MANAGE_TYPE_DELETE,
2266 NULL,
2267 false);
2268 cm_node->qhash_set = 0;
2269 }
2270 }
2271 }
2272
2273 iwqp = cm_node->iwqp;
2274 if (iwqp) {
2275 iwqp->cm_node = NULL;
2276 i40iw_rem_ref(&iwqp->ibqp);
2277 cm_node->iwqp = NULL;
2278 } else if (cm_node->qhash_set) {
2279 i40iw_get_addr_info(cm_node, &nfo);
f27b4746
FL		 2280 i40iw_manage_qhash(cm_node->iwdev,
2281 &nfo,
2282 I40IW_QHASH_TYPE_TCP_ESTABLISHED,
2283 I40IW_QHASH_MANAGE_TYPE_DELETE,
2284 NULL,
2285 false);
2286 cm_node->qhash_set = 0;
2287 }
2288
2289 cm_node->cm_core->stats_nodes_destroyed++;
2290 kfree(cm_node);
2291}
2292
2293/**
2294 * i40iw_handle_fin_pkt - FIN packet received
2295 * @cm_node: connection's node
2296 */
2297static void i40iw_handle_fin_pkt(struct i40iw_cm_node *cm_node)
2298{
2299 u32 ret;
2300
2301 switch (cm_node->state) {
2302 case I40IW_CM_STATE_SYN_RCVD:
2303 case I40IW_CM_STATE_SYN_SENT:
2304 case I40IW_CM_STATE_ESTABLISHED:
2305 case I40IW_CM_STATE_MPAREJ_RCVD:
2306 cm_node->tcp_cntxt.rcv_nxt++;
2307 i40iw_cleanup_retrans_entry(cm_node);
2308 cm_node->state = I40IW_CM_STATE_LAST_ACK;
2309 i40iw_send_fin(cm_node);
2310 break;
2311 case I40IW_CM_STATE_MPAREQ_SENT:
2312 i40iw_create_event(cm_node, I40IW_CM_EVENT_ABORTED);
2313 cm_node->tcp_cntxt.rcv_nxt++;
2314 i40iw_cleanup_retrans_entry(cm_node);
2315 cm_node->state = I40IW_CM_STATE_CLOSED;
2316 atomic_inc(&cm_node->ref_count);
2317 i40iw_send_reset(cm_node);
2318 break;
2319 case I40IW_CM_STATE_FIN_WAIT1:
2320 cm_node->tcp_cntxt.rcv_nxt++;
2321 i40iw_cleanup_retrans_entry(cm_node);
2322 cm_node->state = I40IW_CM_STATE_CLOSING;
2323 i40iw_send_ack(cm_node);
2324 /*
2325 * Wait for ACK as this is simultaneous close.
2326 * After we receive ACK, do not send anything.
2327 * Just rm the node.
2328 */
2329 break;
2330 case I40IW_CM_STATE_FIN_WAIT2:
2331 cm_node->tcp_cntxt.rcv_nxt++;
2332 i40iw_cleanup_retrans_entry(cm_node);
2333 cm_node->state = I40IW_CM_STATE_TIME_WAIT;
2334 i40iw_send_ack(cm_node);
2335 ret =
2336 i40iw_schedule_cm_timer(cm_node, NULL, I40IW_TIMER_TYPE_CLOSE, 1, 0);
2337 if (ret)
2338 i40iw_pr_err("node %p state = %d\n", cm_node, cm_node->state);
2339 break;
2340 case I40IW_CM_STATE_TIME_WAIT:
2341 cm_node->tcp_cntxt.rcv_nxt++;
2342 i40iw_cleanup_retrans_entry(cm_node);
2343 cm_node->state = I40IW_CM_STATE_CLOSED;
2344 i40iw_rem_ref_cm_node(cm_node);
2345 break;
2346 case I40IW_CM_STATE_OFFLOADED:
2347 default:
2348 i40iw_pr_err("bad state node %p state = %d\n", cm_node, cm_node->state);
2349 break;
2350 }
2351}
2352
2353/**
2354 * i40iw_handle_rst_pkt - process received RST packet
2355 * @cm_node: connection's node
2356 * @rbuf: receive buffer
2357 */
2358static void i40iw_handle_rst_pkt(struct i40iw_cm_node *cm_node,
2359 struct i40iw_puda_buf *rbuf)
2360{
2361 i40iw_cleanup_retrans_entry(cm_node);
2362 switch (cm_node->state) {
2363 case I40IW_CM_STATE_SYN_SENT:
2364 case I40IW_CM_STATE_MPAREQ_SENT:
2365 switch (cm_node->mpa_frame_rev) {
2366 case IETF_MPA_V2:
2367 cm_node->mpa_frame_rev = IETF_MPA_V1;
2368 /* send a syn and goto syn sent state */
2369 cm_node->state = I40IW_CM_STATE_SYN_SENT;
2370 if (i40iw_send_syn(cm_node, 0))
2371 i40iw_active_open_err(cm_node, false);
2372 break;
2373 case IETF_MPA_V1:
2374 default:
2375 i40iw_active_open_err(cm_node, false);
2376 break;
2377 }
2378 break;
2379 case I40IW_CM_STATE_MPAREQ_RCVD:
2380 atomic_add_return(1, &cm_node->passive_state);
2381 break;
2382 case I40IW_CM_STATE_ESTABLISHED:
2383 case I40IW_CM_STATE_SYN_RCVD:
2384 case I40IW_CM_STATE_LISTENING:
2385 i40iw_pr_err("Bad state state = %d\n", cm_node->state);
2386 i40iw_passive_open_err(cm_node, false);
2387 break;
2388 case I40IW_CM_STATE_OFFLOADED:
2389 i40iw_active_open_err(cm_node, false);
2390 break;
2391 case I40IW_CM_STATE_CLOSED:
2392 break;
2393 case I40IW_CM_STATE_FIN_WAIT2:
2394 case I40IW_CM_STATE_FIN_WAIT1:
2395 case I40IW_CM_STATE_LAST_ACK:
2396 cm_node->cm_id->rem_ref(cm_node->cm_id);
2397 case I40IW_CM_STATE_TIME_WAIT:
2398 cm_node->state = I40IW_CM_STATE_CLOSED;
2399 i40iw_rem_ref_cm_node(cm_node);
2400 break;
2401 default:
2402 break;
2403 }
2404}
2405
2406/**
2407 * i40iw_handle_rcv_mpa - Process a recv'd mpa buffer
2408 * @cm_node: connection's node
2409 * @rbuf: receive buffer
2410 */
2411static void i40iw_handle_rcv_mpa(struct i40iw_cm_node *cm_node,
2412 struct i40iw_puda_buf *rbuf)
2413{
2414 int ret;
2415 int datasize = rbuf->datalen;
2416 u8 *dataloc = rbuf->data;
2417
2418 enum i40iw_cm_event_type type = I40IW_CM_EVENT_UNKNOWN;
2419 u32 res_type;
2420
2421 ret = i40iw_parse_mpa(cm_node, dataloc, &res_type, datasize);
2422 if (ret) {
2423 if (cm_node->state == I40IW_CM_STATE_MPAREQ_SENT)
2424 i40iw_active_open_err(cm_node, true);
2425 else
2426 i40iw_passive_open_err(cm_node, true);
2427 return;
2428 }
2429
2430 switch (cm_node->state) {
2431 case I40IW_CM_STATE_ESTABLISHED:
2432 if (res_type == I40IW_MPA_REQUEST_REJECT)
2433 i40iw_pr_err("state for reject\n");
2434 cm_node->state = I40IW_CM_STATE_MPAREQ_RCVD;
2435 type = I40IW_CM_EVENT_MPA_REQ;
2436 i40iw_send_ack(cm_node); /* ACK received MPA request */
2437 atomic_set(&cm_node->passive_state,
2438 I40IW_PASSIVE_STATE_INDICATED);
2439 break;
2440 case I40IW_CM_STATE_MPAREQ_SENT:
2441 i40iw_cleanup_retrans_entry(cm_node);
2442 if (res_type == I40IW_MPA_REQUEST_REJECT) {
2443 type = I40IW_CM_EVENT_MPA_REJECT;
2444 cm_node->state = I40IW_CM_STATE_MPAREJ_RCVD;
2445 } else {
2446 type = I40IW_CM_EVENT_CONNECTED;
2447 cm_node->state = I40IW_CM_STATE_OFFLOADED;
f27b4746 2448 }
b117f479 2449 i40iw_send_ack(cm_node);
f27b4746
FL		 2450 break;
2451 default:
2452 pr_err("%s wrong cm_node state =%d\n", __func__, cm_node->state);
2453 break;
2454 }
2455 i40iw_create_event(cm_node, type);
2456}
2457
2458/**
2459 * i40iw_indicate_pkt_err - Send up err event to cm
2460 * @cm_node: connection's node
2461 */
2462static void i40iw_indicate_pkt_err(struct i40iw_cm_node *cm_node)
2463{
2464 switch (cm_node->state) {
2465 case I40IW_CM_STATE_SYN_SENT:
2466 case I40IW_CM_STATE_MPAREQ_SENT:
2467 i40iw_active_open_err(cm_node, true);
2468 break;
2469 case I40IW_CM_STATE_ESTABLISHED:
2470 case I40IW_CM_STATE_SYN_RCVD:
2471 i40iw_passive_open_err(cm_node, true);
2472 break;
2473 case I40IW_CM_STATE_OFFLOADED:
2474 default:
2475 break;
2476 }
2477}
2478
2479/**
2480 * i40iw_check_syn - Check for error on received syn ack
2481 * @cm_node: connection's node
2482 * @tcph: pointer tcp header
2483 */
2484static int i40iw_check_syn(struct i40iw_cm_node *cm_node, struct tcphdr *tcph)
2485{
2486 int err = 0;
2487
2488 if (ntohl(tcph->ack_seq) != cm_node->tcp_cntxt.loc_seq_num) {
2489 err = 1;
2490 i40iw_active_open_err(cm_node, true);
2491 }
2492 return err;
2493}
2494
2495/**
2496 * i40iw_check_seq - check seq numbers if OK
2497 * @cm_node: connection's node
2498 * @tcph: pointer tcp header
2499 */
2500static int i40iw_check_seq(struct i40iw_cm_node *cm_node, struct tcphdr *tcph)
2501{
2502 int err = 0;
2503 u32 seq;
2504 u32 ack_seq;
2505 u32 loc_seq_num = cm_node->tcp_cntxt.loc_seq_num;
2506 u32 rcv_nxt = cm_node->tcp_cntxt.rcv_nxt;
2507 u32 rcv_wnd;
2508
2509 seq = ntohl(tcph->seq);
2510 ack_seq = ntohl(tcph->ack_seq);
2511 rcv_wnd = cm_node->tcp_cntxt.rcv_wnd;
2512 if (ack_seq != loc_seq_num)
2513 err = -1;
2514 else if (!between(seq, rcv_nxt, (rcv_nxt + rcv_wnd)))
2515 err = -1;
2516 if (err) {
2517 i40iw_pr_err("seq number\n");
2518 i40iw_indicate_pkt_err(cm_node);
2519 }
2520 return err;
2521}
2522
2523/**
2524 * i40iw_handle_syn_pkt - is for Passive node
2525 * @cm_node: connection's node
2526 * @rbuf: receive buffer
2527 */
2528static void i40iw_handle_syn_pkt(struct i40iw_cm_node *cm_node,
2529 struct i40iw_puda_buf *rbuf)
2530{
2531 struct tcphdr *tcph = (struct tcphdr *)rbuf->tcph;
2532 int ret;
2533 u32 inc_sequence;
2534 int optionsize;
2535 struct i40iw_cm_info nfo;
2536
2537 optionsize = (tcph->doff << 2) - sizeof(struct tcphdr);
2538 inc_sequence = ntohl(tcph->seq);
2539
2540 switch (cm_node->state) {
2541 case I40IW_CM_STATE_SYN_SENT:
2542 case I40IW_CM_STATE_MPAREQ_SENT:
2543 /* Rcvd syn on active open connection */
2544 i40iw_active_open_err(cm_node, 1);
2545 break;
2546 case I40IW_CM_STATE_LISTENING:
2547 /* Passive OPEN */
2548 if (atomic_read(&cm_node->listener->pend_accepts_cnt) >
2549 cm_node->listener->backlog) {
2550 cm_node->cm_core->stats_backlog_drops++;
2551 i40iw_passive_open_err(cm_node, false);
2552 break;
2553 }
2554 ret = i40iw_handle_tcp_options(cm_node, tcph, optionsize, 1);
2555 if (ret) {
2556 i40iw_passive_open_err(cm_node, false);
2557 /* drop pkt */
2558 break;
2559 }
2560 cm_node->tcp_cntxt.rcv_nxt = inc_sequence + 1;
2561 cm_node->accept_pend = 1;
2562 atomic_inc(&cm_node->listener->pend_accepts_cnt);
2563
2564 cm_node->state = I40IW_CM_STATE_SYN_RCVD;
2565 i40iw_get_addr_info(cm_node, &nfo);
2566 ret = i40iw_manage_qhash(cm_node->iwdev,
2567 &nfo,
2568 I40IW_QHASH_TYPE_TCP_ESTABLISHED,
2569 I40IW_QHASH_MANAGE_TYPE_ADD,
2570 (void *)cm_node,
2571 false);
2572 cm_node->qhash_set = true;
2573 break;
2574 case I40IW_CM_STATE_CLOSED:
2575 i40iw_cleanup_retrans_entry(cm_node);
2576 atomic_inc(&cm_node->ref_count);
2577 i40iw_send_reset(cm_node);
2578 break;
2579 case I40IW_CM_STATE_OFFLOADED:
2580 case I40IW_CM_STATE_ESTABLISHED:
2581 case I40IW_CM_STATE_FIN_WAIT1:
2582 case I40IW_CM_STATE_FIN_WAIT2:
2583 case I40IW_CM_STATE_MPAREQ_RCVD:
2584 case I40IW_CM_STATE_LAST_ACK:
2585 case I40IW_CM_STATE_CLOSING:
2586 case I40IW_CM_STATE_UNKNOWN:
2587 default:
2588 break;
2589 }
2590}
2591
2592/**
2593 * i40iw_handle_synack_pkt - Process SYN+ACK packet (active side)
2594 * @cm_node: connection's node
2595 * @rbuf: receive buffer
2596 */
2597static void i40iw_handle_synack_pkt(struct i40iw_cm_node *cm_node,
2598 struct i40iw_puda_buf *rbuf)
2599{
2600 struct tcphdr *tcph = (struct tcphdr *)rbuf->tcph;
2601 int ret;
2602 u32 inc_sequence;
2603 int optionsize;
2604
2605 optionsize = (tcph->doff << 2) - sizeof(struct tcphdr);
2606 inc_sequence = ntohl(tcph->seq);
2607 switch (cm_node->state) {
2608 case I40IW_CM_STATE_SYN_SENT:
2609 i40iw_cleanup_retrans_entry(cm_node);
2610 /* active open */
2611 if (i40iw_check_syn(cm_node, tcph)) {
2612 i40iw_pr_err("check syn fail\n");
2613 return;
2614 }
2615 cm_node->tcp_cntxt.rem_ack_num = ntohl(tcph->ack_seq);
2616 /* setup options */
2617 ret = i40iw_handle_tcp_options(cm_node, tcph, optionsize, 0);
2618 if (ret) {
2619 i40iw_debug(cm_node->dev,
2620 I40IW_DEBUG_CM,
2621 "cm_node=%p tcp_options failed\n",
2622 cm_node);
2623 break;
2624 }
2625 i40iw_cleanup_retrans_entry(cm_node);
2626 cm_node->tcp_cntxt.rcv_nxt = inc_sequence + 1;
2627 i40iw_send_ack(cm_node); /* ACK for the syn_ack */
2628 ret = i40iw_send_mpa_request(cm_node);
2629 if (ret) {
2630 i40iw_debug(cm_node->dev,
2631 I40IW_DEBUG_CM,
2632 "cm_node=%p i40iw_send_mpa_request failed\n",
2633 cm_node);
2634 break;
2635 }
2636 cm_node->state = I40IW_CM_STATE_MPAREQ_SENT;
2637 break;
2638 case I40IW_CM_STATE_MPAREQ_RCVD:
2639 i40iw_passive_open_err(cm_node, true);
2640 break;
2641 case I40IW_CM_STATE_LISTENING:
2642 cm_node->tcp_cntxt.loc_seq_num = ntohl(tcph->ack_seq);
2643 i40iw_cleanup_retrans_entry(cm_node);
2644 cm_node->state = I40IW_CM_STATE_CLOSED;
2645 i40iw_send_reset(cm_node);
2646 break;
2647 case I40IW_CM_STATE_CLOSED:
2648 cm_node->tcp_cntxt.loc_seq_num = ntohl(tcph->ack_seq);
2649 i40iw_cleanup_retrans_entry(cm_node);
2650 atomic_inc(&cm_node->ref_count);
2651 i40iw_send_reset(cm_node);
2652 break;
2653 case I40IW_CM_STATE_ESTABLISHED:
2654 case I40IW_CM_STATE_FIN_WAIT1:
2655 case I40IW_CM_STATE_FIN_WAIT2:
2656 case I40IW_CM_STATE_LAST_ACK:
2657 case I40IW_CM_STATE_OFFLOADED:
2658 case I40IW_CM_STATE_CLOSING:
2659 case I40IW_CM_STATE_UNKNOWN:
2660 case I40IW_CM_STATE_MPAREQ_SENT:
2661 default:
2662 break;
2663 }
2664}
2665
2666/**
2667 * i40iw_handle_ack_pkt - process packet with ACK
2668 * @cm_node: connection's node
2669 * @rbuf: receive buffer
2670 */
2671static int i40iw_handle_ack_pkt(struct i40iw_cm_node *cm_node,
2672 struct i40iw_puda_buf *rbuf)
2673{
2674 struct tcphdr *tcph = (struct tcphdr *)rbuf->tcph;
2675 u32 inc_sequence;
2676 int ret = 0;
2677 int optionsize;
2678 u32 datasize = rbuf->datalen;
2679
2680 optionsize = (tcph->doff << 2) - sizeof(struct tcphdr);
2681
2682 if (i40iw_check_seq(cm_node, tcph))
2683 return -EINVAL;
2684
2685 inc_sequence = ntohl(tcph->seq);
2686 switch (cm_node->state) {
2687 case I40IW_CM_STATE_SYN_RCVD:
2688 i40iw_cleanup_retrans_entry(cm_node);
2689 ret = i40iw_handle_tcp_options(cm_node, tcph, optionsize, 1);
2690 if (ret)
2691 break;
2692 cm_node->tcp_cntxt.rem_ack_num = ntohl(tcph->ack_seq);
2693 cm_node->state = I40IW_CM_STATE_ESTABLISHED;
2694 if (datasize) {
2695 cm_node->tcp_cntxt.rcv_nxt = inc_sequence + datasize;
f27b4746
FL		 2696 i40iw_handle_rcv_mpa(cm_node, rbuf);
2697 }
2698 break;
2699 case I40IW_CM_STATE_ESTABLISHED:
2700 i40iw_cleanup_retrans_entry(cm_node);
2701 if (datasize) {
2702 cm_node->tcp_cntxt.rcv_nxt = inc_sequence + datasize;
2703 i40iw_handle_rcv_mpa(cm_node, rbuf);
2704 }
2705 break;
2706 case I40IW_CM_STATE_MPAREQ_SENT:
2707 cm_node->tcp_cntxt.rem_ack_num = ntohl(tcph->ack_seq);
2708 if (datasize) {
2709 cm_node->tcp_cntxt.rcv_nxt = inc_sequence + datasize;
2710 i40iw_handle_rcv_mpa(cm_node, rbuf);
2711 }
2712 break;
2713 case I40IW_CM_STATE_LISTENING:
2714 i40iw_cleanup_retrans_entry(cm_node);
2715 cm_node->state = I40IW_CM_STATE_CLOSED;
2716 i40iw_send_reset(cm_node);
2717 break;
2718 case I40IW_CM_STATE_CLOSED:
2719 i40iw_cleanup_retrans_entry(cm_node);
2720 atomic_inc(&cm_node->ref_count);
2721 i40iw_send_reset(cm_node);
2722 break;
2723 case I40IW_CM_STATE_LAST_ACK:
2724 case I40IW_CM_STATE_CLOSING:
2725 i40iw_cleanup_retrans_entry(cm_node);
2726 cm_node->state = I40IW_CM_STATE_CLOSED;
2727 if (!cm_node->accept_pend)
2728 cm_node->cm_id->rem_ref(cm_node->cm_id);
2729 i40iw_rem_ref_cm_node(cm_node);
2730 break;
2731 case I40IW_CM_STATE_FIN_WAIT1:
2732 i40iw_cleanup_retrans_entry(cm_node);
2733 cm_node->state = I40IW_CM_STATE_FIN_WAIT2;
2734 break;
2735 case I40IW_CM_STATE_SYN_SENT:
2736 case I40IW_CM_STATE_FIN_WAIT2:
2737 case I40IW_CM_STATE_OFFLOADED:
2738 case I40IW_CM_STATE_MPAREQ_RCVD:
2739 case I40IW_CM_STATE_UNKNOWN:
2740 default:
2741 i40iw_cleanup_retrans_entry(cm_node);
2742 break;
2743 }
2744 return ret;
2745}
2746
2747/**
2748 * i40iw_process_packet - process cm packet
2749 * @cm_node: connection's node
2750 * @rbuf: receive buffer
2751 */
2752static void i40iw_process_packet(struct i40iw_cm_node *cm_node,
2753 struct i40iw_puda_buf *rbuf)
2754{
2755 enum i40iw_tcpip_pkt_type pkt_type = I40IW_PKT_TYPE_UNKNOWN;
2756 struct tcphdr *tcph = (struct tcphdr *)rbuf->tcph;
2757 u32 fin_set = 0;
2758 int ret;
2759
2760 if (tcph->rst) {
2761 pkt_type = I40IW_PKT_TYPE_RST;
2762 } else if (tcph->syn) {
2763 pkt_type = I40IW_PKT_TYPE_SYN;
2764 if (tcph->ack)
2765 pkt_type = I40IW_PKT_TYPE_SYNACK;
2766 } else if (tcph->ack) {
2767 pkt_type = I40IW_PKT_TYPE_ACK;
2768 }
2769 if (tcph->fin)
2770 fin_set = 1;
2771
2772 switch (pkt_type) {
2773 case I40IW_PKT_TYPE_SYN:
2774 i40iw_handle_syn_pkt(cm_node, rbuf);
2775 break;
2776 case I40IW_PKT_TYPE_SYNACK:
2777 i40iw_handle_synack_pkt(cm_node, rbuf);
2778 break;
2779 case I40IW_PKT_TYPE_ACK:
2780 ret = i40iw_handle_ack_pkt(cm_node, rbuf);
2781 if (fin_set && !ret)
2782 i40iw_handle_fin_pkt(cm_node);
2783 break;
2784 case I40IW_PKT_TYPE_RST:
2785 i40iw_handle_rst_pkt(cm_node, rbuf);
2786 break;
2787 default:
2788 if (fin_set &&
2789 (!i40iw_check_seq(cm_node, (struct tcphdr *)rbuf->tcph)))
2790 i40iw_handle_fin_pkt(cm_node);
2791 break;
2792 }
2793}
2794
2795/**
2796 * i40iw_make_listen_node - create a listen node with params
2797 * @cm_core: cm's core
2798 * @iwdev: iwarp device structure
2799 * @cm_info: quad info for connection
2800 */
2801static struct i40iw_cm_listener *i40iw_make_listen_node(
2802 struct i40iw_cm_core *cm_core,
2803 struct i40iw_device *iwdev,
2804 struct i40iw_cm_info *cm_info)
2805{
2806 struct i40iw_cm_listener *listener;
f27b4746
FL		 2807 unsigned long flags;
2808
2809 /* cannot have multiple matching listeners */
2810 listener = i40iw_find_listener(cm_core, cm_info->loc_addr,
2811 cm_info->loc_port,
2812 cm_info->vlan_id,
8d8cd0bf 2813 I40IW_CM_LISTENER_EITHER_STATE);
f27b4746
FL		 2814 if (listener &&
2815 (listener->listener_state == I40IW_CM_LISTENER_ACTIVE_STATE)) {
2816 atomic_dec(&listener->ref_count);
2817 i40iw_debug(cm_core->dev,
2818 I40IW_DEBUG_CM,
2819 "Not creating listener since it already exists\n");
2820 return NULL;
2821 }
2822
2823 if (!listener) {
f27b4746
FL		 2824 /* create a CM listen node (1/2 node to compare incoming traffic to) */
2825 listener = kzalloc(sizeof(*listener), GFP_ATOMIC);
2826 if (!listener)
2827 return NULL;
2828 cm_core->stats_listen_nodes_created++;
2829 memcpy(listener->loc_addr, cm_info->loc_addr, sizeof(listener->loc_addr));
f27b4746 2830 listener->loc_port = cm_info->loc_port;
f27b4746
FL		 2831
2832 INIT_LIST_HEAD(&listener->child_listen_list);
2833
2834 atomic_set(&listener->ref_count, 1);
2835 } else {
2836 listener->reused_node = 1;
2837 }
2838
2839 listener->cm_id = cm_info->cm_id;
2840 listener->ipv4 = cm_info->ipv4;
2841 listener->vlan_id = cm_info->vlan_id;
2842 atomic_set(&listener->pend_accepts_cnt, 0);
2843 listener->cm_core = cm_core;
2844 listener->iwdev = iwdev;
2845
2846 listener->backlog = cm_info->backlog;
2847 listener->listener_state = I40IW_CM_LISTENER_ACTIVE_STATE;
2848
2849 if (!listener->reused_node) {
2850 spin_lock_irqsave(&cm_core->listen_list_lock, flags);
2851 list_add(&listener->list, &cm_core->listen_nodes);
2852 spin_unlock_irqrestore(&cm_core->listen_list_lock, flags);
2853 }
2854
2855 return listener;
2856}
2857
2858/**
2859 * i40iw_create_cm_node - make a connection node with params
2860 * @cm_core: cm's core
2861 * @iwdev: iwarp device structure
2862 * @private_data_len: len to provate data for mpa request
2863 * @private_data: pointer to private data for connection
2864 * @cm_info: quad info for connection
2865 */
2866static struct i40iw_cm_node *i40iw_create_cm_node(
2867 struct i40iw_cm_core *cm_core,
2868 struct i40iw_device *iwdev,
2869 u16 private_data_len,
2870 void *private_data,
2871 struct i40iw_cm_info *cm_info)
2872{
f27b4746
FL		 2873 struct i40iw_cm_node *cm_node;
2874 struct i40iw_cm_listener *loopback_remotelistener;
2875 struct i40iw_cm_node *loopback_remotenode;
2876 struct i40iw_cm_info loopback_cm_info;
2877
2878 /* create a CM connection node */
2879 cm_node = i40iw_make_cm_node(cm_core, iwdev, cm_info, NULL);
2880 if (!cm_node)
bf69f494 2881 return ERR_PTR(-ENOMEM);
f27b4746
FL		 2882 /* set our node side to client (active) side */
2883 cm_node->tcp_cntxt.client = 1;
2884 cm_node->tcp_cntxt.rcv_wscale = I40IW_CM_DEFAULT_RCV_WND_SCALE;
2885
2886 if (!memcmp(cm_info->loc_addr, cm_info->rem_addr, sizeof(cm_info->loc_addr))) {
2887 loopback_remotelistener = i40iw_find_listener(
2888 cm_core,
8d8cd0bf
FL		 2889 cm_info->rem_addr,
2890 cm_node->rem_port,
f27b4746 2891 cm_node->vlan_id,
8d8cd0bf 2892 I40IW_CM_LISTENER_ACTIVE_STATE);
f27b4746 2893 if (!loopback_remotelistener) {
bf69f494
SS		 2894 i40iw_rem_ref_cm_node(cm_node);
2895 return ERR_PTR(-ECONNREFUSED);
f27b4746
FL		 2896 } else {
2897 loopback_cm_info = *cm_info;
2898 loopback_cm_info.loc_port = cm_info->rem_port;
2899 loopback_cm_info.rem_port = cm_info->loc_port;
f27b4746
FL		 2900 loopback_cm_info.cm_id = loopback_remotelistener->cm_id;
2901 loopback_cm_info.ipv4 = cm_info->ipv4;
2902 loopback_remotenode = i40iw_make_cm_node(cm_core,
2903 iwdev,
2904 &loopback_cm_info,
2905 loopback_remotelistener);
2906 if (!loopback_remotenode) {
2907 i40iw_rem_ref_cm_node(cm_node);
bf69f494 2908 return ERR_PTR(-ENOMEM);
f27b4746
FL		 2909 }
2910 cm_core->stats_loopbacks++;
2911 loopback_remotenode->loopbackpartner = cm_node;
2912 loopback_remotenode->tcp_cntxt.rcv_wscale =
2913 I40IW_CM_DEFAULT_RCV_WND_SCALE;
2914 cm_node->loopbackpartner = loopback_remotenode;
2915 memcpy(loopback_remotenode->pdata_buf, private_data,
2916 private_data_len);
2917 loopback_remotenode->pdata.size = private_data_len;
2918
2919 cm_node->state = I40IW_CM_STATE_OFFLOADED;
2920 cm_node->tcp_cntxt.rcv_nxt =
2921 loopback_remotenode->tcp_cntxt.loc_seq_num;
2922 loopback_remotenode->tcp_cntxt.rcv_nxt =
2923 cm_node->tcp_cntxt.loc_seq_num;
2924 cm_node->tcp_cntxt.max_snd_wnd =
2925 loopback_remotenode->tcp_cntxt.rcv_wnd;
2926 loopback_remotenode->tcp_cntxt.max_snd_wnd = cm_node->tcp_cntxt.rcv_wnd;
2927 cm_node->tcp_cntxt.snd_wnd = loopback_remotenode->tcp_cntxt.rcv_wnd;
2928 loopback_remotenode->tcp_cntxt.snd_wnd = cm_node->tcp_cntxt.rcv_wnd;
2929 cm_node->tcp_cntxt.snd_wscale = loopback_remotenode->tcp_cntxt.rcv_wscale;
2930 loopback_remotenode->tcp_cntxt.snd_wscale = cm_node->tcp_cntxt.rcv_wscale;
2931 loopback_remotenode->state = I40IW_CM_STATE_MPAREQ_RCVD;
2932 i40iw_create_event(loopback_remotenode, I40IW_CM_EVENT_MPA_REQ);
2933 }
2934 return cm_node;
2935 }
2936
2937 cm_node->pdata.size = private_data_len;
2938 cm_node->pdata.addr = cm_node->pdata_buf;
2939
2940 memcpy(cm_node->pdata_buf, private_data, private_data_len);
2941
2942 cm_node->state = I40IW_CM_STATE_SYN_SENT;
f27b4746
FL		 2943 return cm_node;
2944}
2945
2946/**
2947 * i40iw_cm_reject - reject and teardown a connection
2948 * @cm_node: connection's node
2949 * @pdate: ptr to private data for reject
2950 * @plen: size of private data
2951 */
2952static int i40iw_cm_reject(struct i40iw_cm_node *cm_node, const void *pdata, u8 plen)
2953{
2954 int ret = 0;
2955 int err;
2956 int passive_state;
2957 struct iw_cm_id *cm_id = cm_node->cm_id;
2958 struct i40iw_cm_node *loopback = cm_node->loopbackpartner;
2959
2960 if (cm_node->tcp_cntxt.client)
2961 return ret;
2962 i40iw_cleanup_retrans_entry(cm_node);
2963
2964 if (!loopback) {
2965 passive_state = atomic_add_return(1, &cm_node->passive_state);
2966 if (passive_state == I40IW_SEND_RESET_EVENT) {
2967 cm_node->state = I40IW_CM_STATE_CLOSED;
2968 i40iw_rem_ref_cm_node(cm_node);
2969 } else {
2970 if (cm_node->state == I40IW_CM_STATE_LISTENER_DESTROYED) {
2971 i40iw_rem_ref_cm_node(cm_node);
2972 } else {
2973 ret = i40iw_send_mpa_reject(cm_node, pdata, plen);
2974 if (ret) {
2975 cm_node->state = I40IW_CM_STATE_CLOSED;
2976 err = i40iw_send_reset(cm_node);
2977 if (err)
2978 i40iw_pr_err("send reset failed\n");
2979 } else {
2980 cm_id->add_ref(cm_id);
2981 }
2982 }
2983 }
2984 } else {
2985 cm_node->cm_id = NULL;
2986 if (cm_node->state == I40IW_CM_STATE_LISTENER_DESTROYED) {
2987 i40iw_rem_ref_cm_node(cm_node);
2988 i40iw_rem_ref_cm_node(loopback);
2989 } else {
2990 ret = i40iw_send_cm_event(loopback,
2991 loopback->cm_id,
2992 IW_CM_EVENT_CONNECT_REPLY,
2993 -ECONNREFUSED);
2994 i40iw_rem_ref_cm_node(cm_node);
2995 loopback->state = I40IW_CM_STATE_CLOSING;
2996
2997 cm_id = loopback->cm_id;
2998 i40iw_rem_ref_cm_node(loopback);
2999 cm_id->rem_ref(cm_id);
3000 }
3001 }
3002
3003 return ret;
3004}
3005
3006/**
3007 * i40iw_cm_close - close of cm connection
3008 * @cm_node: connection's node
3009 */
3010static int i40iw_cm_close(struct i40iw_cm_node *cm_node)
3011{
3012 int ret = 0;
3013
3014 if (!cm_node)
3015 return -EINVAL;
3016
3017 switch (cm_node->state) {
3018 case I40IW_CM_STATE_SYN_RCVD:
3019 case I40IW_CM_STATE_SYN_SENT:
3020 case I40IW_CM_STATE_ONE_SIDE_ESTABLISHED:
3021 case I40IW_CM_STATE_ESTABLISHED:
3022 case I40IW_CM_STATE_ACCEPTING:
3023 case I40IW_CM_STATE_MPAREQ_SENT:
3024 case I40IW_CM_STATE_MPAREQ_RCVD:
3025 i40iw_cleanup_retrans_entry(cm_node);
3026 i40iw_send_reset(cm_node);
3027 break;
3028 case I40IW_CM_STATE_CLOSE_WAIT:
3029 cm_node->state = I40IW_CM_STATE_LAST_ACK;
3030 i40iw_send_fin(cm_node);
3031 break;
3032 case I40IW_CM_STATE_FIN_WAIT1:
3033 case I40IW_CM_STATE_FIN_WAIT2:
3034 case I40IW_CM_STATE_LAST_ACK:
3035 case I40IW_CM_STATE_TIME_WAIT:
3036 case I40IW_CM_STATE_CLOSING:
3037 ret = -1;
3038 break;
3039 case I40IW_CM_STATE_LISTENING:
3040 i40iw_cleanup_retrans_entry(cm_node);
3041 i40iw_send_reset(cm_node);
3042 break;
3043 case I40IW_CM_STATE_MPAREJ_RCVD:
3044 case I40IW_CM_STATE_UNKNOWN:
3045 case I40IW_CM_STATE_INITED:
3046 case I40IW_CM_STATE_CLOSED:
3047 case I40IW_CM_STATE_LISTENER_DESTROYED:
3048 i40iw_rem_ref_cm_node(cm_node);
3049 break;
3050 case I40IW_CM_STATE_OFFLOADED:
3051 if (cm_node->send_entry)
3052 i40iw_pr_err("send_entry\n");
3053 i40iw_rem_ref_cm_node(cm_node);
3054 break;
3055 }
3056 return ret;
3057}
3058
3059/**
3060 * i40iw_receive_ilq - recv an ETHERNET packet, and process it
3061 * through CM
d6f7bbcc 3062 * @vsi: pointer to the vsi structure
f27b4746
FL		 3063 * @rbuf: receive buffer
3064 */
d6f7bbcc 3065void i40iw_receive_ilq(struct i40iw_sc_vsi *vsi, struct i40iw_puda_buf *rbuf)
f27b4746
FL		 3066{
3067 struct i40iw_cm_node *cm_node;
3068 struct i40iw_cm_listener *listener;
3069 struct iphdr *iph;
3070 struct ipv6hdr *ip6h;
3071 struct tcphdr *tcph;
3072 struct i40iw_cm_info cm_info;
d6f7bbcc 3073 struct i40iw_sc_dev *dev = vsi->dev;
f27b4746
FL		 3074 struct i40iw_device *iwdev = (struct i40iw_device *)dev->back_dev;
3075 struct i40iw_cm_core *cm_core = &iwdev->cm_core;
3076 struct vlan_ethhdr *ethh;
0fc2dc58 3077 u16 vtag;
f27b4746
FL		 3078
3079 /* if vlan, then maclen = 18 else 14 */
3080 iph = (struct iphdr *)rbuf->iph;
3081 memset(&cm_info, 0, sizeof(cm_info));
3082
3083 i40iw_debug_buf(dev,
3084 I40IW_DEBUG_ILQ,
3085 "RECEIVE ILQ BUFFER",
3086 rbuf->mem.va,
3087 rbuf->totallen);
3088 ethh = (struct vlan_ethhdr *)rbuf->mem.va;
3089
3090 if (ethh->h_vlan_proto == htons(ETH_P_8021Q)) {
0fc2dc58
HO		 3091 vtag = ntohs(ethh->h_vlan_TCI);
3092 cm_info.user_pri = (vtag & VLAN_PRIO_MASK) >> VLAN_PRIO_SHIFT;
3093 cm_info.vlan_id = vtag & VLAN_VID_MASK;
f27b4746
FL		 3094 i40iw_debug(cm_core->dev,
3095 I40IW_DEBUG_CM,
3096 "%s vlan_id=%d\n",
3097 __func__,
3098 cm_info.vlan_id);
3099 } else {
3100 cm_info.vlan_id = I40IW_NO_VLAN;
3101 }
3102 tcph = (struct tcphdr *)rbuf->tcph;
3103
3104 if (rbuf->ipv4) {
3105 cm_info.loc_addr[0] = ntohl(iph->daddr);
3106 cm_info.rem_addr[0] = ntohl(iph->saddr);
3107 cm_info.ipv4 = true;
7eb2bde7 3108 cm_info.tos = iph->tos;
f27b4746
FL		 3109 } else {
3110 ip6h = (struct ipv6hdr *)rbuf->iph;
3111 i40iw_copy_ip_ntohl(cm_info.loc_addr,
3112 ip6h->daddr.in6_u.u6_addr32);
3113 i40iw_copy_ip_ntohl(cm_info.rem_addr,
3114 ip6h->saddr.in6_u.u6_addr32);
3115 cm_info.ipv4 = false;
7eb2bde7 3116 cm_info.tos = (ip6h->priority << 4) | (ip6h->flow_lbl[0] >> 4);
f27b4746
FL		 3117 }
3118 cm_info.loc_port = ntohs(tcph->dest);
3119 cm_info.rem_port = ntohs(tcph->source);
f27b4746 3120 cm_node = i40iw_find_node(cm_core,
8d8cd0bf
FL		 3121 cm_info.rem_port,
3122 cm_info.rem_addr,
3123 cm_info.loc_port,
3124 cm_info.loc_addr,
f27b4746
FL		 3125 true);
3126
3127 if (!cm_node) {
3128 /* Only type of packet accepted are for */
3129 /* the PASSIVE open (syn only) */
3130 if (!tcph->syn || tcph->ack)
3131 return;
3132 listener =
3133 i40iw_find_listener(cm_core,
8d8cd0bf
FL		 3134 cm_info.loc_addr,
3135 cm_info.loc_port,
f27b4746 3136 cm_info.vlan_id,
8d8cd0bf 3137 I40IW_CM_LISTENER_ACTIVE_STATE);
f27b4746
FL		 3138 if (!listener) {
3139 cm_info.cm_id = NULL;
3140 i40iw_debug(cm_core->dev,
3141 I40IW_DEBUG_CM,
3142 "%s no listener found\n",
3143 __func__);
3144 return;
3145 }
3146 cm_info.cm_id = listener->cm_id;
3147 cm_node = i40iw_make_cm_node(cm_core, iwdev, &cm_info, listener);
3148 if (!cm_node) {
3149 i40iw_debug(cm_core->dev,
3150 I40IW_DEBUG_CM,
3151 "%s allocate node failed\n",
3152 __func__);
3153 atomic_dec(&listener->ref_count);
3154 return;
3155 }
3156 if (!tcph->rst && !tcph->fin) {
3157 cm_node->state = I40IW_CM_STATE_LISTENING;
3158 } else {
3159 i40iw_rem_ref_cm_node(cm_node);
3160 return;
3161 }
3162 atomic_inc(&cm_node->ref_count);
3163 } else if (cm_node->state == I40IW_CM_STATE_OFFLOADED) {
3164 i40iw_rem_ref_cm_node(cm_node);
3165 return;
3166 }
3167 i40iw_process_packet(cm_node, rbuf);
3168 i40iw_rem_ref_cm_node(cm_node);
3169}
3170
3171/**
3172 * i40iw_setup_cm_core - allocate a top level instance of a cm
3173 * core
3174 * @iwdev: iwarp device structure
3175 */
3176void i40iw_setup_cm_core(struct i40iw_device *iwdev)
3177{
3178 struct i40iw_cm_core *cm_core = &iwdev->cm_core;
3179
3180 cm_core->iwdev = iwdev;
3181 cm_core->dev = &iwdev->sc_dev;
3182
3183 INIT_LIST_HEAD(&cm_core->connected_nodes);
3184 INIT_LIST_HEAD(&cm_core->listen_nodes);
3185
96ff2c11
GT		 3186 setup_timer(&cm_core->tcp_timer, i40iw_cm_timer_tick,
3187 (unsigned long)cm_core);
f27b4746
FL		 3188
3189 spin_lock_init(&cm_core->ht_lock);
3190 spin_lock_init(&cm_core->listen_list_lock);
3191
5e9ff9b0
BS		 3192 cm_core->event_wq = alloc_ordered_workqueue("iwewq",
3193 WQ_MEM_RECLAIM);
3194
3195 cm_core->disconn_wq = alloc_ordered_workqueue("iwdwq",
3196 WQ_MEM_RECLAIM);
f27b4746
FL		 3197}
3198
3199/**
3200 * i40iw_cleanup_cm_core - deallocate a top level instance of a
3201 * cm core
3202 * @cm_core: cm's core
3203 */
3204void i40iw_cleanup_cm_core(struct i40iw_cm_core *cm_core)
3205{
3206 unsigned long flags;
3207
3208 if (!cm_core)
3209 return;
3210
3211 spin_lock_irqsave(&cm_core->ht_lock, flags);
3212 if (timer_pending(&cm_core->tcp_timer))
3213 del_timer_sync(&cm_core->tcp_timer);
3214 spin_unlock_irqrestore(&cm_core->ht_lock, flags);
3215
3216 destroy_workqueue(cm_core->event_wq);
3217 destroy_workqueue(cm_core->disconn_wq);
3218}
3219
3220/**
3221 * i40iw_init_tcp_ctx - setup qp context
3222 * @cm_node: connection's node
3223 * @tcp_info: offload info for tcp
3224 * @iwqp: associate qp for the connection
3225 */
3226static void i40iw_init_tcp_ctx(struct i40iw_cm_node *cm_node,
3227 struct i40iw_tcp_offload_info *tcp_info,
3228 struct i40iw_qp *iwqp)
3229{
3230 tcp_info->ipv4 = cm_node->ipv4;
3231 tcp_info->drop_ooo_seg = true;
3232 tcp_info->wscale = true;
3233 tcp_info->ignore_tcp_opt = true;
3234 tcp_info->ignore_tcp_uns_opt = true;
3235 tcp_info->no_nagle = false;
3236
3237 tcp_info->ttl = I40IW_DEFAULT_TTL;
3238 tcp_info->rtt_var = cpu_to_le32(I40IW_DEFAULT_RTT_VAR);
3239 tcp_info->ss_thresh = cpu_to_le32(I40IW_DEFAULT_SS_THRESH);
3240 tcp_info->rexmit_thresh = I40IW_DEFAULT_REXMIT_THRESH;
3241
3242 tcp_info->tcp_state = I40IW_TCP_STATE_ESTABLISHED;
3243 tcp_info->snd_wscale = cm_node->tcp_cntxt.snd_wscale;
3244 tcp_info->rcv_wscale = cm_node->tcp_cntxt.rcv_wscale;
3245
3246 tcp_info->snd_nxt = cpu_to_le32(cm_node->tcp_cntxt.loc_seq_num);
3247 tcp_info->snd_wnd = cpu_to_le32(cm_node->tcp_cntxt.snd_wnd);
3248 tcp_info->rcv_nxt = cpu_to_le32(cm_node->tcp_cntxt.rcv_nxt);
3249 tcp_info->snd_max = cpu_to_le32(cm_node->tcp_cntxt.loc_seq_num);
3250
3251 tcp_info->snd_una = cpu_to_le32(cm_node->tcp_cntxt.loc_seq_num);
3252 tcp_info->cwnd = cpu_to_le32(2 * cm_node->tcp_cntxt.mss);
3253 tcp_info->snd_wl1 = cpu_to_le32(cm_node->tcp_cntxt.rcv_nxt);
3254 tcp_info->snd_wl2 = cpu_to_le32(cm_node->tcp_cntxt.loc_seq_num);
3255 tcp_info->max_snd_window = cpu_to_le32(cm_node->tcp_cntxt.max_snd_wnd);
3256 tcp_info->rcv_wnd = cpu_to_le32(cm_node->tcp_cntxt.rcv_wnd <<
3257 cm_node->tcp_cntxt.rcv_wscale);
3258
3259 tcp_info->flow_label = 0;
3260 tcp_info->snd_mss = cpu_to_le32(((u32)cm_node->tcp_cntxt.mss));
3261 if (cm_node->vlan_id < VLAN_TAG_PRESENT) {
3262 tcp_info->insert_vlan_tag = true;
3263 tcp_info->vlan_tag = cpu_to_le16(cm_node->vlan_id);
3264 }
3265 if (cm_node->ipv4) {
8d8cd0bf
FL		 3266 tcp_info->src_port = cpu_to_le16(cm_node->loc_port);
3267 tcp_info->dst_port = cpu_to_le16(cm_node->rem_port);
f27b4746 3268
8d8cd0bf
FL		 3269 tcp_info->dest_ip_addr3 = cpu_to_le32(cm_node->rem_addr[0]);
3270 tcp_info->local_ipaddr3 = cpu_to_le32(cm_node->loc_addr[0]);
20c61f7e
IM		 3271 tcp_info->arp_idx =
3272 cpu_to_le16((u16)i40iw_arp_table(
3273 iwqp->iwdev,
3274 &tcp_info->dest_ip_addr3,
3275 true,
3276 NULL,
3277 I40IW_ARP_RESOLVE));
f27b4746 3278 } else {
8d8cd0bf
FL		 3279 tcp_info->src_port = cpu_to_le16(cm_node->loc_port);
3280 tcp_info->dst_port = cpu_to_le16(cm_node->rem_port);
3281 tcp_info->dest_ip_addr0 = cpu_to_le32(cm_node->rem_addr[0]);
3282 tcp_info->dest_ip_addr1 = cpu_to_le32(cm_node->rem_addr[1]);
3283 tcp_info->dest_ip_addr2 = cpu_to_le32(cm_node->rem_addr[2]);
3284 tcp_info->dest_ip_addr3 = cpu_to_le32(cm_node->rem_addr[3]);
3285 tcp_info->local_ipaddr0 = cpu_to_le32(cm_node->loc_addr[0]);
3286 tcp_info->local_ipaddr1 = cpu_to_le32(cm_node->loc_addr[1]);
3287 tcp_info->local_ipaddr2 = cpu_to_le32(cm_node->loc_addr[2]);
3288 tcp_info->local_ipaddr3 = cpu_to_le32(cm_node->loc_addr[3]);
20c61f7e
IM		 3289 tcp_info->arp_idx =
3290 cpu_to_le16((u16)i40iw_arp_table(
3291 iwqp->iwdev,
3292 &tcp_info->dest_ip_addr0,
3293 false,
3294 NULL,
3295 I40IW_ARP_RESOLVE));
f27b4746
FL		 3296 }
3297}
3298
3299/**
3300 * i40iw_cm_init_tsa_conn - setup qp for RTS
3301 * @iwqp: associate qp for the connection
3302 * @cm_node: connection's node
3303 */
3304static void i40iw_cm_init_tsa_conn(struct i40iw_qp *iwqp,
3305 struct i40iw_cm_node *cm_node)
3306{
3307 struct i40iw_tcp_offload_info tcp_info;
3308 struct i40iwarp_offload_info *iwarp_info;
3309 struct i40iw_qp_host_ctx_info *ctx_info;
3310 struct i40iw_device *iwdev = iwqp->iwdev;
3311 struct i40iw_sc_dev *dev = &iwqp->iwdev->sc_dev;
3312
3313 memset(&tcp_info, 0x00, sizeof(struct i40iw_tcp_offload_info));
3314 iwarp_info = &iwqp->iwarp_info;
3315 ctx_info = &iwqp->ctx_info;
3316
3317 ctx_info->tcp_info = &tcp_info;
3318 ctx_info->send_cq_num = iwqp->iwscq->sc_cq.cq_uk.cq_id;
3319 ctx_info->rcv_cq_num = iwqp->iwrcq->sc_cq.cq_uk.cq_id;
3320
3321 iwarp_info->ord_size = cm_node->ord_size;
3322 iwarp_info->ird_size = i40iw_derive_hw_ird_setting(cm_node->ird_size);
3323
3324 if (iwarp_info->ord_size == 1)
3325 iwarp_info->ord_size = 2;
3326
3327 iwarp_info->rd_enable = true;
3328 iwarp_info->rdmap_ver = 1;
3329 iwarp_info->ddp_ver = 1;
3330
3331 iwarp_info->pd_id = iwqp->iwpd->sc_pd.pd_id;
3332
3333 ctx_info->tcp_info_valid = true;
3334 ctx_info->iwarp_info_valid = true;
0fc2dc58
HO		 3335 ctx_info->add_to_qoslist = true;
3336 ctx_info->user_pri = cm_node->user_pri;
f27b4746
FL		 3337
3338 i40iw_init_tcp_ctx(cm_node, &tcp_info, iwqp);
3339 if (cm_node->snd_mark_en) {
3340 iwarp_info->snd_mark_en = true;
3341 iwarp_info->snd_mark_offset = (tcp_info.snd_nxt &
3342 SNDMARKER_SEQNMASK) + cm_node->lsmm_size;
3343 }
3344
3345 cm_node->state = I40IW_CM_STATE_OFFLOADED;
3346 tcp_info.tcp_state = I40IW_TCP_STATE_ESTABLISHED;
3347 tcp_info.src_mac_addr_idx = iwdev->mac_ip_table_idx;
7eb2bde7 3348 tcp_info.tos = cm_node->tos;
f27b4746
FL		 3349
3350 dev->iw_priv_qp_ops->qp_setctx(&iwqp->sc_qp, (u64 *)(iwqp->host_ctx.va), ctx_info);
3351
3352 /* once tcp_info is set, no need to do it again */
3353 ctx_info->tcp_info_valid = false;
3354 ctx_info->iwarp_info_valid = false;
0fc2dc58 3355 ctx_info->add_to_qoslist = false;
f27b4746
FL		 3356}
3357
3358/**
3359 * i40iw_cm_disconn - when a connection is being closed
3360 * @iwqp: associate qp for the connection
3361 */
f4a87ca1 3362void i40iw_cm_disconn(struct i40iw_qp *iwqp)
f27b4746
FL		 3363{
3364 struct disconn_work *work;
3365 struct i40iw_device *iwdev = iwqp->iwdev;
3366 struct i40iw_cm_core *cm_core = &iwdev->cm_core;
f4a87ca1 3367 unsigned long flags;
f27b4746
FL		 3368
3369 work = kzalloc(sizeof(*work), GFP_ATOMIC);
3370 if (!work)
f4a87ca1
MI		 3371 return; /* Timer will clean up */
3372
3373 spin_lock_irqsave(&iwdev->qptable_lock, flags);
3374 if (!iwdev->qp_table[iwqp->ibqp.qp_num]) {
3375 spin_unlock_irqrestore(&iwdev->qptable_lock, flags);
3376 i40iw_debug(&iwdev->sc_dev, I40IW_DEBUG_CM,
3377 "%s qp_id %d is already freed\n",
3378 __func__, iwqp->ibqp.qp_num);
3379 kfree(work);
3380 return;
3381 }
f27b4746 3382 i40iw_add_ref(&iwqp->ibqp);
f4a87ca1
MI		 3383 spin_unlock_irqrestore(&iwdev->qptable_lock, flags);
3384
f27b4746
FL		 3385 work->iwqp = iwqp;
3386 INIT_WORK(&work->work, i40iw_disconnect_worker);
3387 queue_work(cm_core->disconn_wq, &work->work);
f4a87ca1 3388 return;
f27b4746
FL		 3389}
3390
f27b4746
FL		 3391/**
3392 * i40iw_qp_disconnect - free qp and close cm
3393 * @iwqp: associate qp for the connection
3394 */
3395static void i40iw_qp_disconnect(struct i40iw_qp *iwqp)
3396{
3397 struct i40iw_device *iwdev;
3398 struct i40iw_ib_device *iwibdev;
3399
3400 iwdev = to_iwdev(iwqp->ibqp.device);
3401 if (!iwdev) {
3402 i40iw_pr_err("iwdev == NULL\n");
3403 return;
3404 }
3405
3406 iwibdev = iwdev->iwibdev;
3407
3408 if (iwqp->active_conn) {
3409 /* indicate this connection is NOT active */
3410 iwqp->active_conn = 0;
3411 } else {
3412 /* Need to free the Last Streaming Mode Message */
3413 if (iwqp->ietf_mem.va) {
3414 if (iwqp->lsmm_mr)
3415 iwibdev->ibdev.dereg_mr(iwqp->lsmm_mr);
3416 i40iw_free_dma_mem(iwdev->sc_dev.hw, &iwqp->ietf_mem);
3417 }
3418 }
3419
3420 /* close the CM node down if it is still active */
3421 if (iwqp->cm_node) {
3422 i40iw_debug(&iwdev->sc_dev, I40IW_DEBUG_CM, "%s Call close API\n", __func__);
3423 i40iw_cm_close(iwqp->cm_node);
3424 }
3425}
3426
3427/**
3428 * i40iw_cm_disconn_true - called by worker thread to disconnect qp
3429 * @iwqp: associate qp for the connection
3430 */
3431static void i40iw_cm_disconn_true(struct i40iw_qp *iwqp)
3432{
3433 struct iw_cm_id *cm_id;
3434 struct i40iw_device *iwdev;
3435 struct i40iw_sc_qp *qp = &iwqp->sc_qp;
3436 u16 last_ae;
3437 u8 original_hw_tcp_state;
3438 u8 original_ibqp_state;
3439 int disconn_status = 0;
3440 int issue_disconn = 0;
3441 int issue_close = 0;
3442 int issue_flush = 0;
3443 struct ib_event ibevent;
3444 unsigned long flags;
3445 int ret;
3446
3447 if (!iwqp) {
3448 i40iw_pr_err("iwqp == NULL\n");
3449 return;
3450 }
3451
3452 spin_lock_irqsave(&iwqp->lock, flags);
3453 cm_id = iwqp->cm_id;
3454 /* make sure we havent already closed this connection */
3455 if (!cm_id) {
3456 spin_unlock_irqrestore(&iwqp->lock, flags);
3457 return;
3458 }
3459
3460 iwdev = to_iwdev(iwqp->ibqp.device);
3461
3462 original_hw_tcp_state = iwqp->hw_tcp_state;
3463 original_ibqp_state = iwqp->ibqp_state;
3464 last_ae = iwqp->last_aeq;
3465
3466 if (qp->term_flags) {
3467 issue_disconn = 1;
3468 issue_close = 1;
3469 iwqp->cm_id = NULL;
3470 /*When term timer expires after cm_timer, don't want
3471 *terminate-handler to issue cm_disconn which can re-free
3472 *a QP even after its refcnt=0.
3473 */
d627b506 3474 i40iw_terminate_del_timer(qp);
f27b4746
FL		 3475 if (!iwqp->flush_issued) {
3476 iwqp->flush_issued = 1;
3477 issue_flush = 1;
3478 }
3479 } else if ((original_hw_tcp_state == I40IW_TCP_STATE_CLOSE_WAIT) ||
3480 ((original_ibqp_state == IB_QPS_RTS) &&
3481 (last_ae == I40IW_AE_LLP_CONNECTION_RESET))) {
3482 issue_disconn = 1;
3483 if (last_ae == I40IW_AE_LLP_CONNECTION_RESET)
3484 disconn_status = -ECONNRESET;
3485 }
3486
3487 if (((original_hw_tcp_state == I40IW_TCP_STATE_CLOSED) ||
3488 (original_hw_tcp_state == I40IW_TCP_STATE_TIME_WAIT) ||
3489 (last_ae == I40IW_AE_RDMAP_ROE_BAD_LLP_CLOSE) ||
6327cb09
SS		 3490 (last_ae == I40IW_AE_LLP_CONNECTION_RESET) ||
3491 iwdev->reset)) {
f27b4746
FL		 3492 issue_close = 1;
3493 iwqp->cm_id = NULL;
3494 if (!iwqp->flush_issued) {
3495 iwqp->flush_issued = 1;
3496 issue_flush = 1;
3497 }
3498 }
3499
3500 spin_unlock_irqrestore(&iwqp->lock, flags);
3501 if (issue_flush && !iwqp->destroyed) {
3502 /* Flush the queues */
3503 i40iw_flush_wqes(iwdev, iwqp);
3504
e0b010da 3505 if (qp->term_flags && iwqp->ibqp.event_handler) {
f27b4746
FL		 3506 ibevent.device = iwqp->ibqp.device;
3507 ibevent.event = (qp->eventtype == TERM_EVENT_QP_FATAL) ?
3508 IB_EVENT_QP_FATAL : IB_EVENT_QP_ACCESS_ERR;
3509 ibevent.element.qp = &iwqp->ibqp;
3510 iwqp->ibqp.event_handler(&ibevent, iwqp->ibqp.qp_context);
3511 }
3512 }
3513
3514 if (cm_id && cm_id->event_handler) {
3515 if (issue_disconn) {
3516 ret = i40iw_send_cm_event(NULL,
3517 cm_id,
3518 IW_CM_EVENT_DISCONNECT,
3519 disconn_status);
3520
3521 if (ret)
3522 i40iw_debug(&iwdev->sc_dev,
3523 I40IW_DEBUG_CM,
3524 "disconnect event failed %s: - cm_id = %p\n",
3525 __func__, cm_id);
3526 }
3527 if (issue_close) {
3528 i40iw_qp_disconnect(iwqp);
3529 cm_id->provider_data = iwqp;
3530 ret = i40iw_send_cm_event(NULL, cm_id, IW_CM_EVENT_CLOSE, 0);
3531 if (ret)
3532 i40iw_debug(&iwdev->sc_dev,
3533 I40IW_DEBUG_CM,
3534 "close event failed %s: - cm_id = %p\n",
3535 __func__, cm_id);
3536 cm_id->rem_ref(cm_id);
3537 }
3538 }
3539}
3540
3541/**
3542 * i40iw_disconnect_worker - worker for connection close
3543 * @work: points or disconn structure
3544 */
3545static void i40iw_disconnect_worker(struct work_struct *work)
3546{
3547 struct disconn_work *dwork = container_of(work, struct disconn_work, work);
3548 struct i40iw_qp *iwqp = dwork->iwqp;
3549
3550 kfree(dwork);
3551 i40iw_cm_disconn_true(iwqp);
3552 i40iw_rem_ref(&iwqp->ibqp);
3553}
3554
3555/**
3556 * i40iw_accept - registered call for connection to be accepted
3557 * @cm_id: cm information for passive connection
3558 * @conn_param: accpet parameters
3559 */
3560int i40iw_accept(struct iw_cm_id *cm_id, struct iw_cm_conn_param *conn_param)
3561{
3562 struct ib_qp *ibqp;
3563 struct i40iw_qp *iwqp;
3564 struct i40iw_device *iwdev;
3565 struct i40iw_sc_dev *dev;
3566 struct i40iw_cm_node *cm_node;
3567 struct ib_qp_attr attr;
3568 int passive_state;
f27b4746
FL		 3569 struct ib_mr *ibmr;
3570 struct i40iw_pd *iwpd;
3571 u16 buf_len = 0;
3572 struct i40iw_kmem_info accept;
3573 enum i40iw_status_code status;
3574 u64 tagged_offset;
3575
3576 memset(&attr, 0, sizeof(attr));
3577 ibqp = i40iw_get_qp(cm_id->device, conn_param->qpn);
3578 if (!ibqp)
3579 return -EINVAL;
3580
3581 iwqp = to_iwqp(ibqp);
3582 iwdev = iwqp->iwdev;
3583 dev = &iwdev->sc_dev;
3584 cm_node = (struct i40iw_cm_node *)cm_id->provider_data;
3585
3586 if (((struct sockaddr_in *)&cm_id->local_addr)->sin_family == AF_INET) {
3587 cm_node->ipv4 = true;
3588 cm_node->vlan_id = i40iw_get_vlan_ipv4(cm_node->loc_addr);
3589 } else {
3590 cm_node->ipv4 = false;
3591 i40iw_netdev_vlan_ipv6(cm_node->loc_addr, &cm_node->vlan_id, NULL);
3592 }
3593 i40iw_debug(cm_node->dev,
3594 I40IW_DEBUG_CM,
3595 "Accept vlan_id=%d\n",
3596 cm_node->vlan_id);
3597 if (cm_node->state == I40IW_CM_STATE_LISTENER_DESTROYED) {
3598 if (cm_node->loopbackpartner)
3599 i40iw_rem_ref_cm_node(cm_node->loopbackpartner);
3600 i40iw_rem_ref_cm_node(cm_node);
3601 return -EINVAL;
3602 }
3603
3604 passive_state = atomic_add_return(1, &cm_node->passive_state);
3605 if (passive_state == I40IW_SEND_RESET_EVENT) {
3606 i40iw_rem_ref_cm_node(cm_node);
3607 return -ECONNRESET;
3608 }
3609
3610 cm_node->cm_core->stats_accepts++;
3611 iwqp->cm_node = (void *)cm_node;
3612 cm_node->iwqp = iwqp;
3613
7581e96c 3614 buf_len = conn_param->private_data_len + I40IW_MAX_IETF_SIZE;
f27b4746
FL		 3615
3616 status = i40iw_allocate_dma_mem(dev->hw, &iwqp->ietf_mem, buf_len, 1);
3617
3618 if (status)
3619 return -ENOMEM;
3620 cm_node->pdata.size = conn_param->private_data_len;
3621 accept.addr = iwqp->ietf_mem.va;
3622 accept.size = i40iw_cm_build_mpa_frame(cm_node, &accept, MPA_KEY_REPLY);
3623 memcpy(accept.addr + accept.size, conn_param->private_data,
3624 conn_param->private_data_len);
3625
3626 /* setup our first outgoing iWarp send WQE (the IETF frame response) */
3627 if ((cm_node->ipv4 &&
3628 !i40iw_ipv4_is_loopback(cm_node->loc_addr[0], cm_node->rem_addr[0])) ||
3629 (!cm_node->ipv4 &&
3630 !i40iw_ipv6_is_loopback(cm_node->loc_addr, cm_node->rem_addr))) {
f27b4746
FL		 3631 iwpd = iwqp->iwpd;
3632 tagged_offset = (uintptr_t)iwqp->ietf_mem.va;
3633 ibmr = i40iw_reg_phys_mr(&iwpd->ibpd,
3634 iwqp->ietf_mem.pa,
3635 buf_len,
3636 IB_ACCESS_LOCAL_WRITE,
3637 &tagged_offset);
3638 if (IS_ERR(ibmr)) {
3639 i40iw_free_dma_mem(dev->hw, &iwqp->ietf_mem);
3640 return -ENOMEM;
3641 }
3642
3643 ibmr->pd = &iwpd->ibpd;
3644 ibmr->device = iwpd->ibpd.device;
3645 iwqp->lsmm_mr = ibmr;
3646 if (iwqp->page)
3647 iwqp->sc_qp.qp_uk.sq_base = kmap(iwqp->page);
7581e96c 3648 dev->iw_priv_qp_ops->qp_send_lsmm(&iwqp->sc_qp,
f27b4746
FL		 3649 iwqp->ietf_mem.va,
3650 (accept.size + conn_param->private_data_len),
3651 ibmr->lkey);
f27b4746
FL		 3652
3653 } else {
3654 if (iwqp->page)
3655 iwqp->sc_qp.qp_uk.sq_base = kmap(iwqp->page);
07c72d7d 3656 dev->iw_priv_qp_ops->qp_send_lsmm(&iwqp->sc_qp, NULL, 0, 0);
f27b4746
FL		 3657 }
3658
3659 if (iwqp->page)
3660 kunmap(iwqp->page);
3661
3662 iwqp->cm_id = cm_id;
3663 cm_node->cm_id = cm_id;
3664
3665 cm_id->provider_data = (void *)iwqp;
3666 iwqp->active_conn = 0;
3667
3668 cm_node->lsmm_size = accept.size + conn_param->private_data_len;
3669 i40iw_cm_init_tsa_conn(iwqp, cm_node);
3670 cm_id->add_ref(cm_id);
3671 i40iw_add_ref(&iwqp->ibqp);
3672
3673 i40iw_send_cm_event(cm_node, cm_id, IW_CM_EVENT_ESTABLISHED, 0);
3674
3675 attr.qp_state = IB_QPS_RTS;
3676 cm_node->qhash_set = false;
3677 i40iw_modify_qp(&iwqp->ibqp, &attr, IB_QP_STATE, NULL);
3678 if (cm_node->loopbackpartner) {
3679 cm_node->loopbackpartner->pdata.size = conn_param->private_data_len;
3680
3681 /* copy entire MPA frame to our cm_node's frame */
3682 memcpy(cm_node->loopbackpartner->pdata_buf,
3683 conn_param->private_data,
3684 conn_param->private_data_len);
3685 i40iw_create_event(cm_node->loopbackpartner, I40IW_CM_EVENT_CONNECTED);
3686 }
3687
3688 cm_node->accelerated = 1;
3689 if (cm_node->accept_pend) {
3690 if (!cm_node->listener)
3691 i40iw_pr_err("cm_node->listener NULL for passive node\n");
3692 atomic_dec(&cm_node->listener->pend_accepts_cnt);
3693 cm_node->accept_pend = 0;
3694 }
3695 return 0;
3696}
3697
3698/**
3699 * i40iw_reject - registered call for connection to be rejected
3700 * @cm_id: cm information for passive connection
3701 * @pdata: private data to be sent
3702 * @pdata_len: private data length
3703 */
3704int i40iw_reject(struct iw_cm_id *cm_id, const void *pdata, u8 pdata_len)
3705{
3706 struct i40iw_device *iwdev;
3707 struct i40iw_cm_node *cm_node;
3708 struct i40iw_cm_node *loopback;
3709
3710 cm_node = (struct i40iw_cm_node *)cm_id->provider_data;
3711 loopback = cm_node->loopbackpartner;
3712 cm_node->cm_id = cm_id;
3713 cm_node->pdata.size = pdata_len;
3714
3715 iwdev = to_iwdev(cm_id->device);
3716 if (!iwdev)
3717 return -EINVAL;
3718 cm_node->cm_core->stats_rejects++;
3719
3720 if (pdata_len + sizeof(struct ietf_mpa_v2) > MAX_CM_BUFFER)
3721 return -EINVAL;
3722
3723 if (loopback) {
3724 memcpy(&loopback->pdata_buf, pdata, pdata_len);
3725 loopback->pdata.size = pdata_len;
3726 }
3727
3728 return i40iw_cm_reject(cm_node, pdata, pdata_len);
3729}
3730
3731/**
3732 * i40iw_connect - registered call for connection to be established
3733 * @cm_id: cm information for passive connection
3734 * @conn_param: Information about the connection
3735 */
3736int i40iw_connect(struct iw_cm_id *cm_id, struct iw_cm_conn_param *conn_param)
3737{
3738 struct ib_qp *ibqp;
3739 struct i40iw_qp *iwqp;
3740 struct i40iw_device *iwdev;
3741 struct i40iw_cm_node *cm_node;
3742 struct i40iw_cm_info cm_info;
3743 struct sockaddr_in *laddr;
3744 struct sockaddr_in *raddr;
3745 struct sockaddr_in6 *laddr6;
3746 struct sockaddr_in6 *raddr6;
ccea5f0f 3747 bool qhash_set = false;
f27b4746 3748 int apbvt_set = 0;
bf69f494 3749 int err = 0;
f27b4746 3750 enum i40iw_status_code status;
f27b4746
FL		 3751
3752 ibqp = i40iw_get_qp(cm_id->device, conn_param->qpn);
3753 if (!ibqp)
3754 return -EINVAL;
3755 iwqp = to_iwqp(ibqp);
3756 if (!iwqp)
3757 return -EINVAL;
3758 iwdev = to_iwdev(iwqp->ibqp.device);
3759 if (!iwdev)
3760 return -EINVAL;
3761
8d8cd0bf
FL		 3762 laddr = (struct sockaddr_in *)&cm_id->m_local_addr;
3763 raddr = (struct sockaddr_in *)&cm_id->m_remote_addr;
3764 laddr6 = (struct sockaddr_in6 *)&cm_id->m_local_addr;
3765 raddr6 = (struct sockaddr_in6 *)&cm_id->m_remote_addr;
f27b4746
FL		 3766
3767 if (!(laddr->sin_port) || !(raddr->sin_port))
3768 return -EINVAL;
3769
3770 iwqp->active_conn = 1;
3771 iwqp->cm_id = NULL;
3772 cm_id->provider_data = iwqp;
3773
3774 /* set up the connection params for the node */
3775 if (cm_id->remote_addr.ss_family == AF_INET) {
3776 cm_info.ipv4 = true;
3777 memset(cm_info.loc_addr, 0, sizeof(cm_info.loc_addr));
3778 memset(cm_info.rem_addr, 0, sizeof(cm_info.rem_addr));
3779 cm_info.loc_addr[0] = ntohl(laddr->sin_addr.s_addr);
3780 cm_info.rem_addr[0] = ntohl(raddr->sin_addr.s_addr);
3781 cm_info.loc_port = ntohs(laddr->sin_port);
3782 cm_info.rem_port = ntohs(raddr->sin_port);
3783 cm_info.vlan_id = i40iw_get_vlan_ipv4(cm_info.loc_addr);
3784 } else {
3785 cm_info.ipv4 = false;
3786 i40iw_copy_ip_ntohl(cm_info.loc_addr,
3787 laddr6->sin6_addr.in6_u.u6_addr32);
3788 i40iw_copy_ip_ntohl(cm_info.rem_addr,
3789 raddr6->sin6_addr.in6_u.u6_addr32);
3790 cm_info.loc_port = ntohs(laddr6->sin6_port);
3791 cm_info.rem_port = ntohs(raddr6->sin6_port);
3792 i40iw_netdev_vlan_ipv6(cm_info.loc_addr, &cm_info.vlan_id, NULL);
3793 }
f27b4746 3794 cm_info.cm_id = cm_id;
7eb2bde7 3795 cm_info.tos = cm_id->tos;
0fc2dc58
HO		 3796 cm_info.user_pri = rt_tos2priority(cm_id->tos);
3797 i40iw_debug(&iwdev->sc_dev, I40IW_DEBUG_DCB, "%s TOS:[%d] UP:[%d]\n",
3798 __func__, cm_id->tos, cm_info.user_pri);
f27b4746
FL		 3799 if ((cm_info.ipv4 && (laddr->sin_addr.s_addr != raddr->sin_addr.s_addr)) ||
3800 (!cm_info.ipv4 && memcmp(laddr6->sin6_addr.in6_u.u6_addr32,
3801 raddr6->sin6_addr.in6_u.u6_addr32,
3802 sizeof(laddr6->sin6_addr.in6_u.u6_addr32)))) {
3803 status = i40iw_manage_qhash(iwdev,
3804 &cm_info,
3805 I40IW_QHASH_TYPE_TCP_ESTABLISHED,
3806 I40IW_QHASH_MANAGE_TYPE_ADD,
3807 NULL,
3808 true);
8d8cd0bf 3809 if (status)
f27b4746 3810 return -EINVAL;
ccea5f0f 3811 qhash_set = true;
f27b4746 3812 }
8d8cd0bf 3813 status = i40iw_manage_apbvt(iwdev, cm_info.loc_port, I40IW_MANAGE_APBVT_ADD);
f27b4746 3814 if (status) {
f27b4746
FL		 3815 i40iw_manage_qhash(iwdev,
3816 &cm_info,
3817 I40IW_QHASH_TYPE_TCP_ESTABLISHED,
3818 I40IW_QHASH_MANAGE_TYPE_DELETE,
3819 NULL,
3820 false);
3821 return -EINVAL;
3822 }
3823
3824 apbvt_set = 1;
3825 cm_id->add_ref(cm_id);
3826 cm_node = i40iw_create_cm_node(&iwdev->cm_core, iwdev,
3827 conn_param->private_data_len,
3828 (void *)conn_param->private_data,
3829 &cm_info);
bf69f494
SS		 3830
3831 if (IS_ERR(cm_node)) {
3832 err = PTR_ERR(cm_node);
3833 goto err_out;
3834 }
f27b4746
FL		 3835
3836 i40iw_record_ird_ord(cm_node, (u16)conn_param->ird, (u16)conn_param->ord);
3837 if (cm_node->send_rdma0_op == SEND_RDMA_READ_ZERO &&
3838 !cm_node->ord_size)
3839 cm_node->ord_size = 1;
3840
3841 cm_node->apbvt_set = apbvt_set;
ccea5f0f 3842 cm_node->qhash_set = qhash_set;
f27b4746
FL		 3843 iwqp->cm_node = cm_node;
3844 cm_node->iwqp = iwqp;
3845 iwqp->cm_id = cm_id;
3846 i40iw_add_ref(&iwqp->ibqp);
b3437e0d 3847
bf69f494
SS		 3848 if (cm_node->state != I40IW_CM_STATE_OFFLOADED) {
3849 cm_node->state = I40IW_CM_STATE_SYN_SENT;
3850 err = i40iw_send_syn(cm_node, 0);
3851 if (err) {
b3437e0d 3852 i40iw_rem_ref_cm_node(cm_node);
bf69f494 3853 goto err_out;
b3437e0d
IM		 3854 }
3855 }
3856
3857 i40iw_debug(cm_node->dev,
3858 I40IW_DEBUG_CM,
3859 "Api - connect(): port=0x%04x, cm_node=%p, cm_id = %p.\n",
3860 cm_node->rem_port,
3861 cm_node,
3862 cm_node->cm_id);
f27b4746 3863 return 0;
b3437e0d 3864
bf69f494
SS		 3865err_out:
3866 if (cm_info.ipv4)
3867 i40iw_debug(&iwdev->sc_dev,
3868 I40IW_DEBUG_CM,
3869 "Api - connect() FAILED: dest addr=%pI4",
3870 cm_info.rem_addr);
3871 else
3872 i40iw_debug(&iwdev->sc_dev,
3873 I40IW_DEBUG_CM,
3874 "Api - connect() FAILED: dest addr=%pI6",
3875 cm_info.rem_addr);
3876
3877 if (qhash_set)
3878 i40iw_manage_qhash(iwdev,
3879 &cm_info,
3880 I40IW_QHASH_TYPE_TCP_ESTABLISHED,
3881 I40IW_QHASH_MANAGE_TYPE_DELETE,
3882 NULL,
3883 false);
b3437e0d
IM		 3884
3885 if (apbvt_set && !i40iw_listen_port_in_use(&iwdev->cm_core,
3886 cm_info.loc_port))
3887 i40iw_manage_apbvt(iwdev,
3888 cm_info.loc_port,
3889 I40IW_MANAGE_APBVT_DEL);
3890 cm_id->rem_ref(cm_id);
3891 iwdev->cm_core.stats_connect_errs++;
bf69f494 3892 return err;
f27b4746
FL		 3893}
3894
3895/**
3896 * i40iw_create_listen - registered call creating listener
3897 * @cm_id: cm information for passive connection
3898 * @backlog: to max accept pending count
3899 */
3900int i40iw_create_listen(struct iw_cm_id *cm_id, int backlog)
3901{
3902 struct i40iw_device *iwdev;
3903 struct i40iw_cm_listener *cm_listen_node;
3904 struct i40iw_cm_info cm_info;
3905 enum i40iw_status_code ret;
3906 struct sockaddr_in *laddr;
3907 struct sockaddr_in6 *laddr6;
3908 bool wildcard = false;
3909
3910 iwdev = to_iwdev(cm_id->device);
3911 if (!iwdev)
3912 return -EINVAL;
3913
8d8cd0bf
FL		 3914 laddr = (struct sockaddr_in *)&cm_id->m_local_addr;
3915 laddr6 = (struct sockaddr_in6 *)&cm_id->m_local_addr;
f27b4746
FL		 3916 memset(&cm_info, 0, sizeof(cm_info));
3917 if (laddr->sin_family == AF_INET) {
3918 cm_info.ipv4 = true;
3919 cm_info.loc_addr[0] = ntohl(laddr->sin_addr.s_addr);
3920 cm_info.loc_port = ntohs(laddr->sin_port);
3921
3922 if (laddr->sin_addr.s_addr != INADDR_ANY)
3923 cm_info.vlan_id = i40iw_get_vlan_ipv4(cm_info.loc_addr);
3924 else
3925 wildcard = true;
3926
3927 } else {
3928 cm_info.ipv4 = false;
3929 i40iw_copy_ip_ntohl(cm_info.loc_addr,
3930 laddr6->sin6_addr.in6_u.u6_addr32);
3931 cm_info.loc_port = ntohs(laddr6->sin6_port);
3932 if (ipv6_addr_type(&laddr6->sin6_addr) != IPV6_ADDR_ANY)
3933 i40iw_netdev_vlan_ipv6(cm_info.loc_addr,
3934 &cm_info.vlan_id,
3935 NULL);
3936 else
3937 wildcard = true;
3938 }
f27b4746
FL		 3939 cm_info.backlog = backlog;
3940 cm_info.cm_id = cm_id;
3941
3942 cm_listen_node = i40iw_make_listen_node(&iwdev->cm_core, iwdev, &cm_info);
3943 if (!cm_listen_node) {
3944 i40iw_pr_err("cm_listen_node == NULL\n");
3945 return -ENOMEM;
3946 }
3947
3948 cm_id->provider_data = cm_listen_node;
3949
7eb2bde7 3950 cm_listen_node->tos = cm_id->tos;
0fc2dc58
HO		 3951 cm_listen_node->user_pri = rt_tos2priority(cm_id->tos);
3952 cm_info.user_pri = cm_listen_node->user_pri;
0fc2dc58 3953
f27b4746 3954 if (!cm_listen_node->reused_node) {
f27b4746
FL		 3955 if (wildcard) {
3956 if (cm_info.ipv4)
3957 ret = i40iw_add_mqh_4(iwdev,
3958 &cm_info,
3959 cm_listen_node);
3960 else
3961 ret = i40iw_add_mqh_6(iwdev,
3962 &cm_info,
3963 cm_listen_node);
3964 if (ret)
3965 goto error;
3966
3967 ret = i40iw_manage_apbvt(iwdev,
8d8cd0bf 3968 cm_info.loc_port,
f27b4746
FL		 3969 I40IW_MANAGE_APBVT_ADD);
3970
3971 if (ret)
3972 goto error;
3973 } else {
3974 ret = i40iw_manage_qhash(iwdev,
3975 &cm_info,
3976 I40IW_QHASH_TYPE_TCP_SYN,
3977 I40IW_QHASH_MANAGE_TYPE_ADD,
3978 NULL,
3979 true);
3980 if (ret)
3981 goto error;
3982 cm_listen_node->qhash_set = true;
3983 ret = i40iw_manage_apbvt(iwdev,
8d8cd0bf 3984 cm_info.loc_port,
f27b4746
FL		 3985 I40IW_MANAGE_APBVT_ADD);
3986 if (ret)
3987 goto error;
3988 }
3989 }
3990 cm_id->add_ref(cm_id);
3991 cm_listen_node->cm_core->stats_listen_created++;
3992 return 0;
3993 error:
3994 i40iw_cm_del_listen(&iwdev->cm_core, (void *)cm_listen_node, false);
3995 return -EINVAL;
3996}
3997
3998/**
3999 * i40iw_destroy_listen - registered call to destroy listener
4000 * @cm_id: cm information for passive connection
4001 */
4002int i40iw_destroy_listen(struct iw_cm_id *cm_id)
4003{
4004 struct i40iw_device *iwdev;
4005
4006 iwdev = to_iwdev(cm_id->device);
4007 if (cm_id->provider_data)
4008 i40iw_cm_del_listen(&iwdev->cm_core, cm_id->provider_data, true);
4009 else
4010 i40iw_pr_err("cm_id->provider_data was NULL\n");
4011
4012 cm_id->rem_ref(cm_id);
4013
4014 return 0;
4015}
4016
4017/**
4018 * i40iw_cm_event_connected - handle connected active node
4019 * @event: the info for cm_node of connection
4020 */
4021static void i40iw_cm_event_connected(struct i40iw_cm_event *event)
4022{
4023 struct i40iw_qp *iwqp;
4024 struct i40iw_device *iwdev;
4025 struct i40iw_cm_node *cm_node;
4026 struct i40iw_sc_dev *dev;
4027 struct ib_qp_attr attr;
4028 struct iw_cm_id *cm_id;
4029 int status;
4030 bool read0;
4031
4032 cm_node = event->cm_node;
4033 cm_id = cm_node->cm_id;
4034 iwqp = (struct i40iw_qp *)cm_id->provider_data;
4035 iwdev = to_iwdev(iwqp->ibqp.device);
4036 dev = &iwdev->sc_dev;
4037
4038 if (iwqp->destroyed) {
4039 status = -ETIMEDOUT;
4040 goto error;
4041 }
4042 i40iw_cm_init_tsa_conn(iwqp, cm_node);
4043 read0 = (cm_node->send_rdma0_op == SEND_RDMA_READ_ZERO);
4044 if (iwqp->page)
4045 iwqp->sc_qp.qp_uk.sq_base = kmap(iwqp->page);
4046 dev->iw_priv_qp_ops->qp_send_rtt(&iwqp->sc_qp, read0);
4047 if (iwqp->page)
4048 kunmap(iwqp->page);
4049 status = i40iw_send_cm_event(cm_node, cm_id, IW_CM_EVENT_CONNECT_REPLY, 0);
4050 if (status)
4051 i40iw_pr_err("send cm event\n");
4052
4053 memset(&attr, 0, sizeof(attr));
4054 attr.qp_state = IB_QPS_RTS;
4055 cm_node->qhash_set = false;
4056 i40iw_modify_qp(&iwqp->ibqp, &attr, IB_QP_STATE, NULL);
4057
4058 cm_node->accelerated = 1;
4059 if (cm_node->accept_pend) {
4060 if (!cm_node->listener)
4061 i40iw_pr_err("listener is null for passive node\n");
4062 atomic_dec(&cm_node->listener->pend_accepts_cnt);
4063 cm_node->accept_pend = 0;
4064 }
4065 return;
4066
4067error:
4068 iwqp->cm_id = NULL;
4069 cm_id->provider_data = NULL;
4070 i40iw_send_cm_event(event->cm_node,
4071 cm_id,
4072 IW_CM_EVENT_CONNECT_REPLY,
4073 status);
4074 cm_id->rem_ref(cm_id);
4075 i40iw_rem_ref_cm_node(event->cm_node);
4076}
4077
4078/**
4079 * i40iw_cm_event_reset - handle reset
4080 * @event: the info for cm_node of connection
4081 */
4082static void i40iw_cm_event_reset(struct i40iw_cm_event *event)
4083{
4084 struct i40iw_cm_node *cm_node = event->cm_node;
4085 struct iw_cm_id *cm_id = cm_node->cm_id;
4086 struct i40iw_qp *iwqp;
4087
4088 if (!cm_id)
4089 return;
4090
4091 iwqp = cm_id->provider_data;
4092 if (!iwqp)
4093 return;
4094
4095 i40iw_debug(cm_node->dev,
4096 I40IW_DEBUG_CM,
4097 "reset event %p - cm_id = %p\n",
4098 event->cm_node, cm_id);
4099 iwqp->cm_id = NULL;
4100
4101 i40iw_send_cm_event(cm_node, cm_node->cm_id, IW_CM_EVENT_DISCONNECT, -ECONNRESET);
4102 i40iw_send_cm_event(cm_node, cm_node->cm_id, IW_CM_EVENT_CLOSE, 0);
4103}
4104
4105/**
4106 * i40iw_cm_event_handler - worker thread callback to send event to cm upper layer
4107 * @work: pointer of cm event info.
4108 */
4109static void i40iw_cm_event_handler(struct work_struct *work)
4110{
4111 struct i40iw_cm_event *event = container_of(work,
4112 struct i40iw_cm_event,
4113 event_work);
4114 struct i40iw_cm_node *cm_node;
4115
4116 if (!event || !event->cm_node || !event->cm_node->cm_core)
4117 return;
4118
4119 cm_node = event->cm_node;
4120
4121 switch (event->type) {
4122 case I40IW_CM_EVENT_MPA_REQ:
4123 i40iw_send_cm_event(cm_node,
4124 cm_node->cm_id,
4125 IW_CM_EVENT_CONNECT_REQUEST,
4126 0);
4127 break;
4128 case I40IW_CM_EVENT_RESET:
4129 i40iw_cm_event_reset(event);
4130 break;
4131 case I40IW_CM_EVENT_CONNECTED:
4132 if (!event->cm_node->cm_id ||
4133 (event->cm_node->state != I40IW_CM_STATE_OFFLOADED))
4134 break;
4135 i40iw_cm_event_connected(event);
4136 break;
4137 case I40IW_CM_EVENT_MPA_REJECT:
4138 if (!event->cm_node->cm_id ||
4139 (cm_node->state == I40IW_CM_STATE_OFFLOADED))
4140 break;
4141 i40iw_send_cm_event(cm_node,
4142 cm_node->cm_id,
4143 IW_CM_EVENT_CONNECT_REPLY,
4144 -ECONNREFUSED);
4145 break;
4146 case I40IW_CM_EVENT_ABORTED:
4147 if (!event->cm_node->cm_id ||
4148 (event->cm_node->state == I40IW_CM_STATE_OFFLOADED))
4149 break;
4150 i40iw_event_connect_error(event);
4151 break;
4152 default:
4153 i40iw_pr_err("event type = %d\n", event->type);
4154 break;
4155 }
4156
4157 event->cm_info.cm_id->rem_ref(event->cm_info.cm_id);
4158 i40iw_rem_ref_cm_node(event->cm_node);
4159 kfree(event);
4160}
4161
4162/**
4163 * i40iw_cm_post_event - queue event request for worker thread
4164 * @event: cm node's info for up event call
4165 */
4166static void i40iw_cm_post_event(struct i40iw_cm_event *event)
4167{
4168 atomic_inc(&event->cm_node->ref_count);
4169 event->cm_info.cm_id->add_ref(event->cm_info.cm_id);
4170 INIT_WORK(&event->event_work, i40iw_cm_event_handler);
4171
4172 queue_work(event->cm_node->cm_core->event_wq, &event->event_work);
4173}
d5965934 4174
e5e74b61
MI		 4175/**
4176 * i40iw_qhash_ctrl - enable/disable qhash for list
4177 * @iwdev: device pointer
4178 * @parent_listen_node: parent listen node
4179 * @nfo: cm info node
4180 * @ipaddr: Pointer to IPv4 or IPv6 address
4181 * @ipv4: flag indicating IPv4 when true
4182 * @ifup: flag indicating interface up when true
4183 *
4184 * Enables or disables the qhash for the node in the child
4185 * listen list that matches ipaddr. If no matching IP was found
4186 * it will allocate and add a new child listen node to the
4187 * parent listen node. The listen_list_lock is assumed to be
4188 * held when called.
4189 */
4190static void i40iw_qhash_ctrl(struct i40iw_device *iwdev,
4191 struct i40iw_cm_listener *parent_listen_node,
4192 struct i40iw_cm_info *nfo,
4193 u32 *ipaddr, bool ipv4, bool ifup)
4194{
4195 struct list_head *child_listen_list = &parent_listen_node->child_listen_list;
4196 struct i40iw_cm_listener *child_listen_node;
4197 struct list_head *pos, *tpos;
4198 enum i40iw_status_code ret;
4199 bool node_allocated = false;
4200 enum i40iw_quad_hash_manage_type op =
4201 ifup ? I40IW_QHASH_MANAGE_TYPE_ADD : I40IW_QHASH_MANAGE_TYPE_DELETE;
4202
4203 list_for_each_safe(pos, tpos, child_listen_list) {
4204 child_listen_node =
4205 list_entry(pos,
4206 struct i40iw_cm_listener,
4207 child_listen_list);
4208 if (!memcmp(child_listen_node->loc_addr, ipaddr, ipv4 ? 4 : 16))
4209 goto set_qhash;
4210 }
4211
4212 /* if not found then add a child listener if interface is going up */
4213 if (!ifup)
4214 return;
4215 child_listen_node = kzalloc(sizeof(*child_listen_node), GFP_ATOMIC);
4216 if (!child_listen_node)
4217 return;
4218 node_allocated = true;
4219 memcpy(child_listen_node, parent_listen_node, sizeof(*child_listen_node));
4220
4221 memcpy(child_listen_node->loc_addr, ipaddr, ipv4 ? 4 : 16);
4222
4223set_qhash:
4224 memcpy(nfo->loc_addr,
4225 child_listen_node->loc_addr,
4226 sizeof(nfo->loc_addr));
4227 nfo->vlan_id = child_listen_node->vlan_id;
4228 ret = i40iw_manage_qhash(iwdev, nfo,
4229 I40IW_QHASH_TYPE_TCP_SYN,
4230 op,
4231 NULL, false);
4232 if (!ret) {
4233 child_listen_node->qhash_set = ifup;
4234 if (node_allocated)
4235 list_add(&child_listen_node->child_listen_list,
4236 &parent_listen_node->child_listen_list);
4237 } else if (node_allocated) {
4238 kfree(child_listen_node);
4239 }
4240}
4241
d5965934
MI		 4242/**
4243 * i40iw_cm_disconnect_all - disconnect all connected qp's
4244 * @iwdev: device pointer
4245 */
4246void i40iw_cm_disconnect_all(struct i40iw_device *iwdev)
4247{
4248 struct i40iw_cm_core *cm_core = &iwdev->cm_core;
4249 struct list_head *list_core_temp;
4250 struct list_head *list_node;
4251 struct i40iw_cm_node *cm_node;
4252 unsigned long flags;
4253 struct list_head connected_list;
4254 struct ib_qp_attr attr;
4255
4256 INIT_LIST_HEAD(&connected_list);
4257 spin_lock_irqsave(&cm_core->ht_lock, flags);
4258 list_for_each_safe(list_node, list_core_temp, &cm_core->connected_nodes) {
4259 cm_node = container_of(list_node, struct i40iw_cm_node, list);
4260 atomic_inc(&cm_node->ref_count);
4261 list_add(&cm_node->connected_entry, &connected_list);
4262 }
4263 spin_unlock_irqrestore(&cm_core->ht_lock, flags);
4264
4265 list_for_each_safe(list_node, list_core_temp, &connected_list) {
4266 cm_node = container_of(list_node, struct i40iw_cm_node, connected_entry);
4267 attr.qp_state = IB_QPS_ERR;
4268 i40iw_modify_qp(&cm_node->iwqp->ibqp, &attr, IB_QP_STATE, NULL);
6327cb09
SS		 4269 if (iwdev->reset)
4270 i40iw_cm_disconn(cm_node->iwqp);
d5965934
MI		 4271 i40iw_rem_ref_cm_node(cm_node);
4272 }
4273}
e5e74b61
MI		 4274
4275/**
4276 * i40iw_ifdown_notify - process an ifdown on an interface
4277 * @iwdev: device pointer
4278 * @ipaddr: Pointer to IPv4 or IPv6 address
4279 * @ipv4: flag indicating IPv4 when true
4280 * @ifup: flag indicating interface up when true
4281 */
4282void i40iw_if_notify(struct i40iw_device *iwdev, struct net_device *netdev,
4283 u32 *ipaddr, bool ipv4, bool ifup)
4284{
4285 struct i40iw_cm_core *cm_core = &iwdev->cm_core;
4286 unsigned long flags;
4287 struct i40iw_cm_listener *listen_node;
4288 static const u32 ip_zero[4] = { 0, 0, 0, 0 };
4289 struct i40iw_cm_info nfo;
4290 u16 vlan_id = rdma_vlan_dev_vlan_id(netdev);
4291 enum i40iw_status_code ret;
4292 enum i40iw_quad_hash_manage_type op =
4293 ifup ? I40IW_QHASH_MANAGE_TYPE_ADD : I40IW_QHASH_MANAGE_TYPE_DELETE;
4294
4295 /* Disable or enable qhash for listeners */
4296 spin_lock_irqsave(&cm_core->listen_list_lock, flags);
4297 list_for_each_entry(listen_node, &cm_core->listen_nodes, list) {
4298 if (vlan_id == listen_node->vlan_id &&
4299 (!memcmp(listen_node->loc_addr, ipaddr, ipv4 ? 4 : 16) ||
4300 !memcmp(listen_node->loc_addr, ip_zero, ipv4 ? 4 : 16))) {
4301 memcpy(nfo.loc_addr, listen_node->loc_addr,
4302 sizeof(nfo.loc_addr));
4303 nfo.loc_port = listen_node->loc_port;
4304 nfo.ipv4 = listen_node->ipv4;
4305 nfo.vlan_id = listen_node->vlan_id;
4306 nfo.user_pri = listen_node->user_pri;
4307 if (!list_empty(&listen_node->child_listen_list)) {
4308 i40iw_qhash_ctrl(iwdev,
4309 listen_node,
4310 &nfo,
4311 ipaddr, ipv4, ifup);
4312 } else if (memcmp(listen_node->loc_addr, ip_zero,
4313 ipv4 ? 4 : 16)) {
4314 ret = i40iw_manage_qhash(iwdev,
4315 &nfo,
4316 I40IW_QHASH_TYPE_TCP_SYN,
4317 op,
4318 NULL,
4319 false);
4320 if (!ret)
4321 listen_node->qhash_set = ifup;
4322 }
4323 }
4324 }
4325 spin_unlock_irqrestore(&cm_core->listen_list_lock, flags);
4326
4327 /* disconnect any connected qp's on ifdown */
4328 if (!ifup)
4329 i40iw_cm_disconnect_all(iwdev);
4330}
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