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i40iw: Remove checks for more than 48 bytes inline data
[mirror_ubuntu-artful-kernel.git] / drivers / infiniband / hw / i40iw / i40iw_cm.c
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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
71 * @dev: FPK device
72 * @buf: puda buffer to free
73 */
74void i40iw_free_sqbuf(struct i40iw_sc_dev *dev, void *bufp)
75{
76 struct i40iw_puda_buf *buf = (struct i40iw_puda_buf *)bufp;
77 struct i40iw_puda_rsrc *ilq = dev->ilq;
78
79 if (!atomic_dec_return(&buf->refcount))
80 i40iw_puda_ret_bufpool(ilq, buf);
81}
82
83/**
84 * i40iw_derive_hw_ird_setting - Calculate IRD
85 *
86 * @cm_ird: IRD of connection's node
87 *
88 * The ird from the connection is rounded to a supported HW
89 * setting (2,8,32,64) and then encoded for ird_size field of
90 * qp_ctx
91 */
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;
275 break;
276 case IW_CM_EVENT_CONNECT_REPLY:
277 i40iw_get_cmevent_info(cm_node, cm_id, &event);
278 break;
279 case IW_CM_EVENT_ESTABLISHED:
280 event.ird = cm_node->ird_size;
281 event.ord = cm_node->ord_size;
282 break;
283 case IW_CM_EVENT_DISCONNECT:
284 break;
285 case IW_CM_EVENT_CLOSE:
286 break;
287 default:
288 i40iw_pr_err("event type received type = %d\n", type);
289 return -1;
290 }
291 return cm_id->event_handler(cm_id, &event);
292}
293
294/**
295 * i40iw_create_event - create cm event
296 * @cm_node: connection's node
297 * @type: Event type to generate
298 */
299static struct i40iw_cm_event *i40iw_create_event(struct i40iw_cm_node *cm_node,
300 enum i40iw_cm_event_type type)
301{
302 struct i40iw_cm_event *event;
303
304 if (!cm_node->cm_id)
305 return NULL;
306
307 event = kzalloc(sizeof(*event), GFP_ATOMIC);
308
309 if (!event)
310 return NULL;
311
312 event->type = type;
313 event->cm_node = cm_node;
314 memcpy(event->cm_info.rem_addr, cm_node->rem_addr, sizeof(event->cm_info.rem_addr));
315 memcpy(event->cm_info.loc_addr, cm_node->loc_addr, sizeof(event->cm_info.loc_addr));
316 event->cm_info.rem_port = cm_node->rem_port;
317 event->cm_info.loc_port = cm_node->loc_port;
318 event->cm_info.cm_id = cm_node->cm_id;
319
320 i40iw_debug(cm_node->dev,
321 I40IW_DEBUG_CM,
322 "node=%p event=%p type=%u dst=%pI4 src=%pI4\n",
323 cm_node,
324 event,
325 type,
326 event->cm_info.loc_addr,
327 event->cm_info.rem_addr);
328
329 i40iw_cm_post_event(event);
330 return event;
331}
332
333/**
334 * i40iw_free_retrans_entry - free send entry
335 * @cm_node: connection's node
336 */
337static void i40iw_free_retrans_entry(struct i40iw_cm_node *cm_node)
338{
339 struct i40iw_sc_dev *dev = cm_node->dev;
340 struct i40iw_timer_entry *send_entry;
341
342 send_entry = cm_node->send_entry;
343 if (send_entry) {
344 cm_node->send_entry = NULL;
345 i40iw_free_sqbuf(dev, (void *)send_entry->sqbuf);
346 kfree(send_entry);
347 atomic_dec(&cm_node->ref_count);
348 }
349}
350
351/**
352 * i40iw_cleanup_retrans_entry - free send entry with lock
353 * @cm_node: connection's node
354 */
355static void i40iw_cleanup_retrans_entry(struct i40iw_cm_node *cm_node)
356{
357 unsigned long flags;
358
359 spin_lock_irqsave(&cm_node->retrans_list_lock, flags);
360 i40iw_free_retrans_entry(cm_node);
361 spin_unlock_irqrestore(&cm_node->retrans_list_lock, flags);
362}
363
f27b4746
FL		 364/**
365 * i40iw_form_cm_frame - get a free packet and build frame
366 * @cm_node: connection's node ionfo to use in frame
367 * @options: pointer to options info
368 * @hdr: pointer mpa header
369 * @pdata: pointer to private data
370 * @flags: indicates FIN or ACK
371 */
372static struct i40iw_puda_buf *i40iw_form_cm_frame(struct i40iw_cm_node *cm_node,
373 struct i40iw_kmem_info *options,
374 struct i40iw_kmem_info *hdr,
375 struct i40iw_kmem_info *pdata,
376 u8 flags)
377{
378 struct i40iw_puda_buf *sqbuf;
379 struct i40iw_sc_dev *dev = cm_node->dev;
380 u8 *buf;
381
382 struct tcphdr *tcph;
383 struct iphdr *iph;
384 struct ipv6hdr *ip6h;
385 struct ethhdr *ethh;
386 u16 packetsize;
387 u16 eth_hlen = ETH_HLEN;
388 u32 opts_len = 0;
389 u32 pd_len = 0;
390 u32 hdr_len = 0;
0fc2dc58 391 u16 vtag;
f27b4746
FL		 392
393 sqbuf = i40iw_puda_get_bufpool(dev->ilq);
394 if (!sqbuf)
395 return NULL;
396 buf = sqbuf->mem.va;
397
398 if (options)
399 opts_len = (u32)options->size;
400
401 if (hdr)
402 hdr_len = hdr->size;
403
7581e96c 404 if (pdata)
f27b4746 405 pd_len = pdata->size;
f27b4746
FL		 406
407 if (cm_node->vlan_id < VLAN_TAG_PRESENT)
408 eth_hlen += 4;
409
410 if (cm_node->ipv4)
411 packetsize = sizeof(*iph) + sizeof(*tcph);
412 else
413 packetsize = sizeof(*ip6h) + sizeof(*tcph);
414 packetsize += opts_len + hdr_len + pd_len;
415
416 memset(buf, 0x00, eth_hlen + packetsize);
417
418 sqbuf->totallen = packetsize + eth_hlen;
419 sqbuf->maclen = eth_hlen;
420 sqbuf->tcphlen = sizeof(*tcph) + opts_len;
421 sqbuf->scratch = (void *)cm_node;
422
423 ethh = (struct ethhdr *)buf;
424 buf += eth_hlen;
425
426 if (cm_node->ipv4) {
427 sqbuf->ipv4 = true;
428
429 iph = (struct iphdr *)buf;
430 buf += sizeof(*iph);
431 tcph = (struct tcphdr *)buf;
432 buf += sizeof(*tcph);
433
434 ether_addr_copy(ethh->h_dest, cm_node->rem_mac);
435 ether_addr_copy(ethh->h_source, cm_node->loc_mac);
436 if (cm_node->vlan_id < VLAN_TAG_PRESENT) {
437 ((struct vlan_ethhdr *)ethh)->h_vlan_proto = htons(ETH_P_8021Q);
0fc2dc58
HO		 438 vtag = (cm_node->user_pri << VLAN_PRIO_SHIFT) | cm_node->vlan_id;
439 ((struct vlan_ethhdr *)ethh)->h_vlan_TCI = htons(vtag);
f27b4746
FL		 440
441 ((struct vlan_ethhdr *)ethh)->h_vlan_encapsulated_proto = htons(ETH_P_IP);
442 } else {
443 ethh->h_proto = htons(ETH_P_IP);
444 }
445
446 iph->version = IPVERSION;
447 iph->ihl = 5; /* 5 * 4Byte words, IP headr len */
448 iph->tos = 0;
449 iph->tot_len = htons(packetsize);
450 iph->id = htons(++cm_node->tcp_cntxt.loc_id);
451
452 iph->frag_off = htons(0x4000);
453 iph->ttl = 0x40;
454 iph->protocol = IPPROTO_TCP;
8d8cd0bf
FL		 455 iph->saddr = htonl(cm_node->loc_addr[0]);
456 iph->daddr = htonl(cm_node->rem_addr[0]);
f27b4746
FL		 457 } else {
458 sqbuf->ipv4 = false;
459 ip6h = (struct ipv6hdr *)buf;
460 buf += sizeof(*ip6h);
461 tcph = (struct tcphdr *)buf;
462 buf += sizeof(*tcph);
463
464 ether_addr_copy(ethh->h_dest, cm_node->rem_mac);
465 ether_addr_copy(ethh->h_source, cm_node->loc_mac);
466 if (cm_node->vlan_id < VLAN_TAG_PRESENT) {
467 ((struct vlan_ethhdr *)ethh)->h_vlan_proto = htons(ETH_P_8021Q);
0fc2dc58
HO		 468 vtag = (cm_node->user_pri << VLAN_PRIO_SHIFT) | cm_node->vlan_id;
469 ((struct vlan_ethhdr *)ethh)->h_vlan_TCI = htons(vtag);
f27b4746
FL		 470 ((struct vlan_ethhdr *)ethh)->h_vlan_encapsulated_proto = htons(ETH_P_IPV6);
471 } else {
472 ethh->h_proto = htons(ETH_P_IPV6);
473 }
474 ip6h->version = 6;
475 ip6h->flow_lbl[0] = 0;
476 ip6h->flow_lbl[1] = 0;
477 ip6h->flow_lbl[2] = 0;
478 ip6h->payload_len = htons(packetsize - sizeof(*ip6h));
479 ip6h->nexthdr = 6;
480 ip6h->hop_limit = 128;
f27b4746 481 i40iw_copy_ip_htonl(ip6h->saddr.in6_u.u6_addr32,
8d8cd0bf 482 cm_node->loc_addr);
f27b4746 483 i40iw_copy_ip_htonl(ip6h->daddr.in6_u.u6_addr32,
8d8cd0bf 484 cm_node->rem_addr);
f27b4746
FL		 485 }
486
8d8cd0bf
FL		 487 tcph->source = htons(cm_node->loc_port);
488 tcph->dest = htons(cm_node->rem_port);
f27b4746
FL		 489
490 tcph->seq = htonl(cm_node->tcp_cntxt.loc_seq_num);
491
492 if (flags & SET_ACK) {
493 cm_node->tcp_cntxt.loc_ack_num = cm_node->tcp_cntxt.rcv_nxt;
494 tcph->ack_seq = htonl(cm_node->tcp_cntxt.loc_ack_num);
495 tcph->ack = 1;
496 } else {
497 tcph->ack_seq = 0;
498 }
499
500 if (flags & SET_SYN) {
501 cm_node->tcp_cntxt.loc_seq_num++;
502 tcph->syn = 1;
503 } else {
504 cm_node->tcp_cntxt.loc_seq_num += hdr_len + pd_len;
505 }
506
507 if (flags & SET_FIN) {
508 cm_node->tcp_cntxt.loc_seq_num++;
509 tcph->fin = 1;
510 }
511
512 if (flags & SET_RST)
513 tcph->rst = 1;
514
515 tcph->doff = (u16)((sizeof(*tcph) + opts_len + 3) >> 2);
516 sqbuf->tcphlen = tcph->doff << 2;
517 tcph->window = htons(cm_node->tcp_cntxt.rcv_wnd);
518 tcph->urg_ptr = 0;
519
520 if (opts_len) {
521 memcpy(buf, options->addr, opts_len);
522 buf += opts_len;
523 }
524
525 if (hdr_len) {
526 memcpy(buf, hdr->addr, hdr_len);
527 buf += hdr_len;
528 }
529
5dfd5e5e
SS		 530 if (pdata && pdata->addr)
531 memcpy(buf, pdata->addr, pdata->size);
f27b4746
FL		 532
533 atomic_set(&sqbuf->refcount, 1);
534
535 return sqbuf;
536}
537
538/**
539 * i40iw_send_reset - Send RST packet
540 * @cm_node: connection's node
541 */
542static int i40iw_send_reset(struct i40iw_cm_node *cm_node)
543{
544 struct i40iw_puda_buf *sqbuf;
545 int flags = SET_RST | SET_ACK;
546
547 sqbuf = i40iw_form_cm_frame(cm_node, NULL, NULL, NULL, flags);
548 if (!sqbuf) {
549 i40iw_pr_err("no sqbuf\n");
550 return -1;
551 }
552
553 return i40iw_schedule_cm_timer(cm_node, sqbuf, I40IW_TIMER_TYPE_SEND, 0, 1);
554}
555
556/**
557 * i40iw_active_open_err - send event for active side cm error
558 * @cm_node: connection's node
559 * @reset: Flag to send reset or not
560 */
561static void i40iw_active_open_err(struct i40iw_cm_node *cm_node, bool reset)
562{
563 i40iw_cleanup_retrans_entry(cm_node);
564 cm_node->cm_core->stats_connect_errs++;
565 if (reset) {
566 i40iw_debug(cm_node->dev,
567 I40IW_DEBUG_CM,
568 "%s cm_node=%p state=%d\n",
569 __func__,
570 cm_node,
571 cm_node->state);
572 atomic_inc(&cm_node->ref_count);
573 i40iw_send_reset(cm_node);
574 }
575
576 cm_node->state = I40IW_CM_STATE_CLOSED;
577 i40iw_create_event(cm_node, I40IW_CM_EVENT_ABORTED);
578}
579
580/**
581 * i40iw_passive_open_err - handle passive side cm error
582 * @cm_node: connection's node
583 * @reset: send reset or just free cm_node
584 */
585static void i40iw_passive_open_err(struct i40iw_cm_node *cm_node, bool reset)
586{
587 i40iw_cleanup_retrans_entry(cm_node);
588 cm_node->cm_core->stats_passive_errs++;
589 cm_node->state = I40IW_CM_STATE_CLOSED;
590 i40iw_debug(cm_node->dev,
591 I40IW_DEBUG_CM,
592 "%s cm_node=%p state =%d\n",
593 __func__,
594 cm_node,
595 cm_node->state);
596 if (reset)
597 i40iw_send_reset(cm_node);
598 else
599 i40iw_rem_ref_cm_node(cm_node);
600}
601
602/**
603 * i40iw_event_connect_error - to create connect error event
604 * @event: cm information for connect event
605 */
606static void i40iw_event_connect_error(struct i40iw_cm_event *event)
607{
608 struct i40iw_qp *iwqp;
609 struct iw_cm_id *cm_id;
610
611 cm_id = event->cm_node->cm_id;
612 if (!cm_id)
613 return;
614
615 iwqp = cm_id->provider_data;
616
617 if (!iwqp || !iwqp->iwdev)
618 return;
619
620 iwqp->cm_id = NULL;
621 cm_id->provider_data = NULL;
622 i40iw_send_cm_event(event->cm_node, cm_id,
623 IW_CM_EVENT_CONNECT_REPLY,
624 -ECONNRESET);
625 cm_id->rem_ref(cm_id);
626 i40iw_rem_ref_cm_node(event->cm_node);
627}
628
629/**
630 * i40iw_process_options
631 * @cm_node: connection's node
632 * @optionsloc: point to start of options
633 * @optionsize: size of all options
634 * @syn_packet: flag if syn packet
635 */
636static int i40iw_process_options(struct i40iw_cm_node *cm_node,
637 u8 *optionsloc,
638 u32 optionsize,
639 u32 syn_packet)
640{
641 u32 tmp;
642 u32 offset = 0;
643 union all_known_options *all_options;
644 char got_mss_option = 0;
645
646 while (offset < optionsize) {
647 all_options = (union all_known_options *)(optionsloc + offset);
648 switch (all_options->as_base.optionnum) {
649 case OPTION_NUMBER_END:
650 offset = optionsize;
651 break;
652 case OPTION_NUMBER_NONE:
653 offset += 1;
654 continue;
655 case OPTION_NUMBER_MSS:
656 i40iw_debug(cm_node->dev,
657 I40IW_DEBUG_CM,
658 "%s: MSS Length: %d Offset: %d Size: %d\n",
659 __func__,
660 all_options->as_mss.length,
661 offset,
662 optionsize);
663 got_mss_option = 1;
664 if (all_options->as_mss.length != 4)
665 return -1;
666 tmp = ntohs(all_options->as_mss.mss);
667 if (tmp > 0 && tmp < cm_node->tcp_cntxt.mss)
668 cm_node->tcp_cntxt.mss = tmp;
669 break;
670 case OPTION_NUMBER_WINDOW_SCALE:
671 cm_node->tcp_cntxt.snd_wscale =
672 all_options->as_windowscale.shiftcount;
673 break;
674 default:
675 i40iw_debug(cm_node->dev,
676 I40IW_DEBUG_CM,
677 "TCP Option not understood: %x\n",
678 all_options->as_base.optionnum);
679 break;
680 }
681 offset += all_options->as_base.length;
682 }
683 if (!got_mss_option && syn_packet)
684 cm_node->tcp_cntxt.mss = I40IW_CM_DEFAULT_MSS;
685 return 0;
686}
687
688/**
689 * i40iw_handle_tcp_options -
690 * @cm_node: connection's node
691 * @tcph: pointer tcp header
692 * @optionsize: size of options rcvd
693 * @passive: active or passive flag
694 */
695static int i40iw_handle_tcp_options(struct i40iw_cm_node *cm_node,
696 struct tcphdr *tcph,
697 int optionsize,
698 int passive)
699{
700 u8 *optionsloc = (u8 *)&tcph[1];
701
702 if (optionsize) {
703 if (i40iw_process_options(cm_node,
704 optionsloc,
705 optionsize,
706 (u32)tcph->syn)) {
707 i40iw_debug(cm_node->dev,
708 I40IW_DEBUG_CM,
709 "%s: Node %p, Sending RESET\n",
710 __func__,
711 cm_node);
712 if (passive)
713 i40iw_passive_open_err(cm_node, true);
714 else
715 i40iw_active_open_err(cm_node, true);
716 return -1;
717 }
718 }
719
720 cm_node->tcp_cntxt.snd_wnd = ntohs(tcph->window) <<
721 cm_node->tcp_cntxt.snd_wscale;
722
723 if (cm_node->tcp_cntxt.snd_wnd > cm_node->tcp_cntxt.max_snd_wnd)
724 cm_node->tcp_cntxt.max_snd_wnd = cm_node->tcp_cntxt.snd_wnd;
725 return 0;
726}
727
728/**
729 * i40iw_build_mpa_v1 - build a MPA V1 frame
730 * @cm_node: connection's node
731 * @mpa_key: to do read0 or write0
732 */
733static void i40iw_build_mpa_v1(struct i40iw_cm_node *cm_node,
734 void *start_addr,
735 u8 mpa_key)
736{
737 struct ietf_mpa_v1 *mpa_frame = (struct ietf_mpa_v1 *)start_addr;
738
739 switch (mpa_key) {
740 case MPA_KEY_REQUEST:
741 memcpy(mpa_frame->key, IEFT_MPA_KEY_REQ, IETF_MPA_KEY_SIZE);
742 break;
743 case MPA_KEY_REPLY:
744 memcpy(mpa_frame->key, IEFT_MPA_KEY_REP, IETF_MPA_KEY_SIZE);
745 break;
746 default:
747 break;
748 }
749 mpa_frame->flags = IETF_MPA_FLAGS_CRC;
750 mpa_frame->rev = cm_node->mpa_frame_rev;
751 mpa_frame->priv_data_len = htons(cm_node->pdata.size);
752}
753
754/**
755 * i40iw_build_mpa_v2 - build a MPA V2 frame
756 * @cm_node: connection's node
757 * @start_addr: buffer start address
758 * @mpa_key: to do read0 or write0
759 */
760static void i40iw_build_mpa_v2(struct i40iw_cm_node *cm_node,
761 void *start_addr,
762 u8 mpa_key)
763{
764 struct ietf_mpa_v2 *mpa_frame = (struct ietf_mpa_v2 *)start_addr;
765 struct ietf_rtr_msg *rtr_msg = &mpa_frame->rtr_msg;
20c61f7e 766 u16 ctrl_ird, ctrl_ord;
f27b4746
FL		 767
768 /* initialize the upper 5 bytes of the frame */
769 i40iw_build_mpa_v1(cm_node, start_addr, mpa_key);
770 mpa_frame->flags |= IETF_MPA_V2_FLAG;
771 mpa_frame->priv_data_len += htons(IETF_RTR_MSG_SIZE);
772
773 /* initialize RTR msg */
774 if (cm_node->mpav2_ird_ord == IETF_NO_IRD_ORD) {
20c61f7e
IM		 775 ctrl_ird = IETF_NO_IRD_ORD;
776 ctrl_ord = IETF_NO_IRD_ORD;
f27b4746 777 } else {
20c61f7e 778 ctrl_ird = (cm_node->ird_size > IETF_NO_IRD_ORD) ?
f27b4746 779 IETF_NO_IRD_ORD : cm_node->ird_size;
20c61f7e 780 ctrl_ord = (cm_node->ord_size > IETF_NO_IRD_ORD) ?
f27b4746
FL		 781 IETF_NO_IRD_ORD : cm_node->ord_size;
782 }
783
20c61f7e
IM		 784 ctrl_ird |= IETF_PEER_TO_PEER;
785 ctrl_ird |= IETF_FLPDU_ZERO_LEN;
f27b4746
FL		 786
787 switch (mpa_key) {
788 case MPA_KEY_REQUEST:
20c61f7e
IM		 789 ctrl_ord |= IETF_RDMA0_WRITE;
790 ctrl_ord |= IETF_RDMA0_READ;
f27b4746
FL		 791 break;
792 case MPA_KEY_REPLY:
793 switch (cm_node->send_rdma0_op) {
794 case SEND_RDMA_WRITE_ZERO:
20c61f7e 795 ctrl_ord |= IETF_RDMA0_WRITE;
f27b4746
FL		 796 break;
797 case SEND_RDMA_READ_ZERO:
20c61f7e 798 ctrl_ord |= IETF_RDMA0_READ;
f27b4746
FL		 799 break;
800 }
801 break;
802 default:
803 break;
804 }
20c61f7e
IM		 805 rtr_msg->ctrl_ird = htons(ctrl_ird);
806 rtr_msg->ctrl_ord = htons(ctrl_ord);
f27b4746
FL		 807}
808
809/**
810 * i40iw_cm_build_mpa_frame - build mpa frame for mpa version 1 or version 2
811 * @cm_node: connection's node
812 * @mpa: mpa: data buffer
813 * @mpa_key: to do read0 or write0
814 */
815static int i40iw_cm_build_mpa_frame(struct i40iw_cm_node *cm_node,
816 struct i40iw_kmem_info *mpa,
817 u8 mpa_key)
818{
819 int hdr_len = 0;
820
821 switch (cm_node->mpa_frame_rev) {
822 case IETF_MPA_V1:
823 hdr_len = sizeof(struct ietf_mpa_v1);
824 i40iw_build_mpa_v1(cm_node, mpa->addr, mpa_key);
825 break;
826 case IETF_MPA_V2:
827 hdr_len = sizeof(struct ietf_mpa_v2);
828 i40iw_build_mpa_v2(cm_node, mpa->addr, mpa_key);
829 break;
830 default:
831 break;
832 }
833
834 return hdr_len;
835}
836
837/**
838 * i40iw_send_mpa_request - active node send mpa request to passive node
839 * @cm_node: connection's node
840 */
841static int i40iw_send_mpa_request(struct i40iw_cm_node *cm_node)
842{
843 struct i40iw_puda_buf *sqbuf;
844
845 if (!cm_node) {
846 i40iw_pr_err("cm_node == NULL\n");
847 return -1;
848 }
849
850 cm_node->mpa_hdr.addr = &cm_node->mpa_frame;
851 cm_node->mpa_hdr.size = i40iw_cm_build_mpa_frame(cm_node,
852 &cm_node->mpa_hdr,
853 MPA_KEY_REQUEST);
854 if (!cm_node->mpa_hdr.size) {
855 i40iw_pr_err("mpa size = %d\n", cm_node->mpa_hdr.size);
856 return -1;
857 }
858
859 sqbuf = i40iw_form_cm_frame(cm_node,
860 NULL,
861 &cm_node->mpa_hdr,
862 &cm_node->pdata,
863 SET_ACK);
864 if (!sqbuf) {
865 i40iw_pr_err("sq_buf == NULL\n");
866 return -1;
867 }
f27b4746
FL		 868 return i40iw_schedule_cm_timer(cm_node, sqbuf, I40IW_TIMER_TYPE_SEND, 1, 0);
869}
870
871/**
872 * i40iw_send_mpa_reject -
873 * @cm_node: connection's node
874 * @pdata: reject data for connection
875 * @plen: length of reject data
876 */
877static int i40iw_send_mpa_reject(struct i40iw_cm_node *cm_node,
878 const void *pdata,
879 u8 plen)
880{
881 struct i40iw_puda_buf *sqbuf;
882 struct i40iw_kmem_info priv_info;
883
884 cm_node->mpa_hdr.addr = &cm_node->mpa_frame;
885 cm_node->mpa_hdr.size = i40iw_cm_build_mpa_frame(cm_node,
886 &cm_node->mpa_hdr,
887 MPA_KEY_REPLY);
888
889 cm_node->mpa_frame.flags |= IETF_MPA_FLAGS_REJECT;
890 priv_info.addr = (void *)pdata;
891 priv_info.size = plen;
892
893 sqbuf = i40iw_form_cm_frame(cm_node,
894 NULL,
895 &cm_node->mpa_hdr,
896 &priv_info,
897 SET_ACK | SET_FIN);
898 if (!sqbuf) {
899 i40iw_pr_err("no sqbuf\n");
900 return -ENOMEM;
901 }
902 cm_node->state = I40IW_CM_STATE_FIN_WAIT1;
903 return i40iw_schedule_cm_timer(cm_node, sqbuf, I40IW_TIMER_TYPE_SEND, 1, 0);
904}
905
906/**
907 * recv_mpa - process an IETF MPA frame
908 * @cm_node: connection's node
909 * @buffer: Data pointer
910 * @type: to return accept or reject
911 * @len: Len of mpa buffer
912 */
913static int i40iw_parse_mpa(struct i40iw_cm_node *cm_node, u8 *buffer, u32 *type, u32 len)
914{
915 struct ietf_mpa_v1 *mpa_frame;
916 struct ietf_mpa_v2 *mpa_v2_frame;
917 struct ietf_rtr_msg *rtr_msg;
918 int mpa_hdr_len;
919 int priv_data_len;
920
921 *type = I40IW_MPA_REQUEST_ACCEPT;
922
923 if (len < sizeof(struct ietf_mpa_v1)) {
924 i40iw_pr_err("ietf buffer small (%x)\n", len);
925 return -1;
926 }
927
928 mpa_frame = (struct ietf_mpa_v1 *)buffer;
929 mpa_hdr_len = sizeof(struct ietf_mpa_v1);
930 priv_data_len = ntohs(mpa_frame->priv_data_len);
931
932 if (priv_data_len > IETF_MAX_PRIV_DATA_LEN) {
933 i40iw_pr_err("large pri_data %d\n", priv_data_len);
934 return -1;
935 }
936 if (mpa_frame->rev != IETF_MPA_V1 && mpa_frame->rev != IETF_MPA_V2) {
937 i40iw_pr_err("unsupported mpa rev = %d\n", mpa_frame->rev);
938 return -1;
939 }
940 if (mpa_frame->rev > cm_node->mpa_frame_rev) {
941 i40iw_pr_err("rev %d\n", mpa_frame->rev);
942 return -1;
943 }
944 cm_node->mpa_frame_rev = mpa_frame->rev;
945
946 if (cm_node->state != I40IW_CM_STATE_MPAREQ_SENT) {
947 if (memcmp(mpa_frame->key, IEFT_MPA_KEY_REQ, IETF_MPA_KEY_SIZE)) {
948 i40iw_pr_err("Unexpected MPA Key received\n");
949 return -1;
950 }
951 } else {
952 if (memcmp(mpa_frame->key, IEFT_MPA_KEY_REP, IETF_MPA_KEY_SIZE)) {
953 i40iw_pr_err("Unexpected MPA Key received\n");
954 return -1;
955 }
956 }
957
958 if (priv_data_len + mpa_hdr_len > len) {
959 i40iw_pr_err("ietf buffer len(%x + %x != %x)\n",
960 priv_data_len, mpa_hdr_len, len);
961 return -1;
962 }
963 if (len > MAX_CM_BUFFER) {
964 i40iw_pr_err("ietf buffer large len = %d\n", len);
965 return -1;
966 }
967
968 switch (mpa_frame->rev) {
969 case IETF_MPA_V2:{
970 u16 ird_size;
971 u16 ord_size;
972 u16 ctrl_ord;
973 u16 ctrl_ird;
974
975 mpa_v2_frame = (struct ietf_mpa_v2 *)buffer;
976 mpa_hdr_len += IETF_RTR_MSG_SIZE;
977 rtr_msg = &mpa_v2_frame->rtr_msg;
978
979 /* parse rtr message */
980 ctrl_ord = ntohs(rtr_msg->ctrl_ord);
981 ctrl_ird = ntohs(rtr_msg->ctrl_ird);
982 ird_size = ctrl_ird & IETF_NO_IRD_ORD;
983 ord_size = ctrl_ord & IETF_NO_IRD_ORD;
984
985 if (!(ctrl_ird & IETF_PEER_TO_PEER))
986 return -1;
987
988 if (ird_size == IETF_NO_IRD_ORD || ord_size == IETF_NO_IRD_ORD) {
989 cm_node->mpav2_ird_ord = IETF_NO_IRD_ORD;
990 goto negotiate_done;
991 }
992
993 if (cm_node->state != I40IW_CM_STATE_MPAREQ_SENT) {
994 /* responder */
995 if (!ord_size && (ctrl_ord & IETF_RDMA0_READ))
996 cm_node->ird_size = 1;
997 if (cm_node->ord_size > ird_size)
998 cm_node->ord_size = ird_size;
999 } else {
1000 /* initiator */
1001 if (!ird_size && (ctrl_ord & IETF_RDMA0_READ))
1002 return -1;
1003 if (cm_node->ord_size > ird_size)
1004 cm_node->ord_size = ird_size;
1005
1006 if (cm_node->ird_size < ord_size)
1007 /* no resources available */
1008 return -1;
1009 }
1010
1011negotiate_done:
1012 if (ctrl_ord & IETF_RDMA0_READ)
1013 cm_node->send_rdma0_op = SEND_RDMA_READ_ZERO;
1014 else if (ctrl_ord & IETF_RDMA0_WRITE)
1015 cm_node->send_rdma0_op = SEND_RDMA_WRITE_ZERO;
1016 else /* Not supported RDMA0 operation */
1017 return -1;
1018 i40iw_debug(cm_node->dev, I40IW_DEBUG_CM,
1019 "MPAV2: Negotiated ORD: %d, IRD: %d\n",
1020 cm_node->ord_size, cm_node->ird_size);
1021 break;
1022 }
1023 break;
1024 case IETF_MPA_V1:
1025 default:
1026 break;
1027 }
1028
1029 memcpy(cm_node->pdata_buf, buffer + mpa_hdr_len, priv_data_len);
1030 cm_node->pdata.size = priv_data_len;
1031
1032 if (mpa_frame->flags & IETF_MPA_FLAGS_REJECT)
1033 *type = I40IW_MPA_REQUEST_REJECT;
1034
1035 if (mpa_frame->flags & IETF_MPA_FLAGS_MARKERS)
1036 cm_node->snd_mark_en = true;
1037
1038 return 0;
1039}
1040
1041/**
1042 * i40iw_schedule_cm_timer
1043 * @@cm_node: connection's node
1044 * @sqbuf: buffer to send
1045 * @type: if it es send ot close
1046 * @send_retrans: if rexmits to be done
1047 * @close_when_complete: is cm_node to be removed
1048 *
1049 * note - cm_node needs to be protected before calling this. Encase in:
1050 * i40iw_rem_ref_cm_node(cm_core, cm_node);
1051 * i40iw_schedule_cm_timer(...)
1052 * atomic_inc(&cm_node->ref_count);
1053 */
1054int i40iw_schedule_cm_timer(struct i40iw_cm_node *cm_node,
1055 struct i40iw_puda_buf *sqbuf,
1056 enum i40iw_timer_type type,
1057 int send_retrans,
1058 int close_when_complete)
1059{
1060 struct i40iw_sc_dev *dev = cm_node->dev;
1061 struct i40iw_cm_core *cm_core = cm_node->cm_core;
1062 struct i40iw_timer_entry *new_send;
1063 int ret = 0;
1064 u32 was_timer_set;
1065 unsigned long flags;
1066
1067 new_send = kzalloc(sizeof(*new_send), GFP_ATOMIC);
1068 if (!new_send) {
1069 i40iw_free_sqbuf(cm_node->dev, (void *)sqbuf);
1070 return -ENOMEM;
1071 }
1072 new_send->retrycount = I40IW_DEFAULT_RETRYS;
1073 new_send->retranscount = I40IW_DEFAULT_RETRANS;
1074 new_send->sqbuf = sqbuf;
1075 new_send->timetosend = jiffies;
1076 new_send->type = type;
1077 new_send->send_retrans = send_retrans;
1078 new_send->close_when_complete = close_when_complete;
1079
1080 if (type == I40IW_TIMER_TYPE_CLOSE) {
1081 new_send->timetosend += (HZ / 10);
1082 if (cm_node->close_entry) {
1083 kfree(new_send);
1084 i40iw_free_sqbuf(cm_node->dev, (void *)sqbuf);
1085 i40iw_pr_err("already close entry\n");
1086 return -EINVAL;
1087 }
1088 cm_node->close_entry = new_send;
1089 }
1090
1091 if (type == I40IW_TIMER_TYPE_SEND) {
1092 spin_lock_irqsave(&cm_node->retrans_list_lock, flags);
1093 cm_node->send_entry = new_send;
1094 atomic_inc(&cm_node->ref_count);
1095 spin_unlock_irqrestore(&cm_node->retrans_list_lock, flags);
1096 new_send->timetosend = jiffies + I40IW_RETRY_TIMEOUT;
1097
1098 atomic_inc(&sqbuf->refcount);
1099 i40iw_puda_send_buf(dev->ilq, sqbuf);
1100 if (!send_retrans) {
1101 i40iw_cleanup_retrans_entry(cm_node);
1102 if (close_when_complete)
1103 i40iw_rem_ref_cm_node(cm_node);
1104 return ret;
1105 }
1106 }
1107
1108 spin_lock_irqsave(&cm_core->ht_lock, flags);
1109 was_timer_set = timer_pending(&cm_core->tcp_timer);
1110
1111 if (!was_timer_set) {
1112 cm_core->tcp_timer.expires = new_send->timetosend;
1113 add_timer(&cm_core->tcp_timer);
1114 }
1115 spin_unlock_irqrestore(&cm_core->ht_lock, flags);
1116
1117 return ret;
1118}
1119
1120/**
1121 * i40iw_retrans_expired - Could not rexmit the packet
1122 * @cm_node: connection's node
1123 */
1124static void i40iw_retrans_expired(struct i40iw_cm_node *cm_node)
1125{
1126 struct iw_cm_id *cm_id = cm_node->cm_id;
1127 enum i40iw_cm_node_state state = cm_node->state;
1128
1129 cm_node->state = I40IW_CM_STATE_CLOSED;
1130 switch (state) {
1131 case I40IW_CM_STATE_SYN_RCVD:
1132 case I40IW_CM_STATE_CLOSING:
1133 i40iw_rem_ref_cm_node(cm_node);
1134 break;
1135 case I40IW_CM_STATE_FIN_WAIT1:
1136 case I40IW_CM_STATE_LAST_ACK:
1137 if (cm_node->cm_id)
1138 cm_id->rem_ref(cm_id);
1139 i40iw_send_reset(cm_node);
1140 break;
1141 default:
1142 atomic_inc(&cm_node->ref_count);
1143 i40iw_send_reset(cm_node);
1144 i40iw_create_event(cm_node, I40IW_CM_EVENT_ABORTED);
1145 break;
1146 }
1147}
1148
1149/**
1150 * i40iw_handle_close_entry - for handling retry/timeouts
1151 * @cm_node: connection's node
1152 * @rem_node: flag for remove cm_node
1153 */
1154static void i40iw_handle_close_entry(struct i40iw_cm_node *cm_node, u32 rem_node)
1155{
1156 struct i40iw_timer_entry *close_entry = cm_node->close_entry;
1157 struct iw_cm_id *cm_id = cm_node->cm_id;
1158 struct i40iw_qp *iwqp;
1159 unsigned long flags;
1160
1161 if (!close_entry)
1162 return;
1163 iwqp = (struct i40iw_qp *)close_entry->sqbuf;
1164 if (iwqp) {
1165 spin_lock_irqsave(&iwqp->lock, flags);
1166 if (iwqp->cm_id) {
1167 iwqp->hw_tcp_state = I40IW_TCP_STATE_CLOSED;
1168 iwqp->hw_iwarp_state = I40IW_QP_STATE_ERROR;
1169 iwqp->last_aeq = I40IW_AE_RESET_SENT;
1170 iwqp->ibqp_state = IB_QPS_ERR;
1171 spin_unlock_irqrestore(&iwqp->lock, flags);
1172 i40iw_cm_disconn(iwqp);
1173 } else {
1174 spin_unlock_irqrestore(&iwqp->lock, flags);
1175 }
1176 } else if (rem_node) {
1177 /* TIME_WAIT state */
1178 i40iw_rem_ref_cm_node(cm_node);
1179 }
1180 if (cm_id)
1181 cm_id->rem_ref(cm_id);
1182 kfree(close_entry);
1183 cm_node->close_entry = NULL;
1184}
1185
1186/**
1187 * i40iw_cm_timer_tick - system's timer expired callback
1188 * @pass: Pointing to cm_core
1189 */
1190static void i40iw_cm_timer_tick(unsigned long pass)
1191{
1192 unsigned long nexttimeout = jiffies + I40IW_LONG_TIME;
1193 struct i40iw_cm_node *cm_node;
1194 struct i40iw_timer_entry *send_entry, *close_entry;
1195 struct list_head *list_core_temp;
1196 struct list_head *list_node;
1197 struct i40iw_cm_core *cm_core = (struct i40iw_cm_core *)pass;
1198 u32 settimer = 0;
1199 unsigned long timetosend;
1200 struct i40iw_sc_dev *dev;
1201 unsigned long flags;
1202
1203 struct list_head timer_list;
1204
1205 INIT_LIST_HEAD(&timer_list);
1206 spin_lock_irqsave(&cm_core->ht_lock, flags);
1207
1208 list_for_each_safe(list_node, list_core_temp, &cm_core->connected_nodes) {
1209 cm_node = container_of(list_node, struct i40iw_cm_node, list);
1210 if (cm_node->close_entry || cm_node->send_entry) {
1211 atomic_inc(&cm_node->ref_count);
1212 list_add(&cm_node->timer_entry, &timer_list);
1213 }
1214 }
1215 spin_unlock_irqrestore(&cm_core->ht_lock, flags);
1216
1217 list_for_each_safe(list_node, list_core_temp, &timer_list) {
1218 cm_node = container_of(list_node,
1219 struct i40iw_cm_node,
1220 timer_entry);
1221 close_entry = cm_node->close_entry;
1222
1223 if (close_entry) {
1224 if (time_after(close_entry->timetosend, jiffies)) {
1225 if (nexttimeout > close_entry->timetosend ||
1226 !settimer) {
1227 nexttimeout = close_entry->timetosend;
1228 settimer = 1;
1229 }
1230 } else {
1231 i40iw_handle_close_entry(cm_node, 1);
1232 }
1233 }
1234
1235 spin_lock_irqsave(&cm_node->retrans_list_lock, flags);
1236
1237 send_entry = cm_node->send_entry;
1238 if (!send_entry)
1239 goto done;
1240 if (time_after(send_entry->timetosend, jiffies)) {
1241 if (cm_node->state != I40IW_CM_STATE_OFFLOADED) {
1242 if ((nexttimeout > send_entry->timetosend) ||
1243 !settimer) {
1244 nexttimeout = send_entry->timetosend;
1245 settimer = 1;
1246 }
1247 } else {
1248 i40iw_free_retrans_entry(cm_node);
1249 }
1250 goto done;
1251 }
1252
1253 if ((cm_node->state == I40IW_CM_STATE_OFFLOADED) ||
1254 (cm_node->state == I40IW_CM_STATE_CLOSED)) {
1255 i40iw_free_retrans_entry(cm_node);
1256 goto done;
1257 }
1258
1259 if (!send_entry->retranscount || !send_entry->retrycount) {
1260 i40iw_free_retrans_entry(cm_node);
1261
1262 spin_unlock_irqrestore(&cm_node->retrans_list_lock, flags);
1263 i40iw_retrans_expired(cm_node);
1264 cm_node->state = I40IW_CM_STATE_CLOSED;
1265 spin_lock_irqsave(&cm_node->retrans_list_lock, flags);
1266 goto done;
1267 }
1268 cm_node->cm_core->stats_pkt_retrans++;
1269 spin_unlock_irqrestore(&cm_node->retrans_list_lock, flags);
1270
1271 dev = cm_node->dev;
1272 atomic_inc(&send_entry->sqbuf->refcount);
1273 i40iw_puda_send_buf(dev->ilq, send_entry->sqbuf);
1274 spin_lock_irqsave(&cm_node->retrans_list_lock, flags);
1275 if (send_entry->send_retrans) {
1276 send_entry->retranscount--;
1277 timetosend = (I40IW_RETRY_TIMEOUT <<
1278 (I40IW_DEFAULT_RETRANS -
1279 send_entry->retranscount));
1280
1281 send_entry->timetosend = jiffies +
1282 min(timetosend, I40IW_MAX_TIMEOUT);
1283 if (nexttimeout > send_entry->timetosend || !settimer) {
1284 nexttimeout = send_entry->timetosend;
1285 settimer = 1;
1286 }
1287 } else {
1288 int close_when_complete;
1289
1290 close_when_complete = send_entry->close_when_complete;
1291 i40iw_debug(cm_node->dev,
1292 I40IW_DEBUG_CM,
1293 "cm_node=%p state=%d\n",
1294 cm_node,
1295 cm_node->state);
1296 i40iw_free_retrans_entry(cm_node);
1297 if (close_when_complete)
1298 i40iw_rem_ref_cm_node(cm_node);
1299 }
1300done:
1301 spin_unlock_irqrestore(&cm_node->retrans_list_lock, flags);
1302 i40iw_rem_ref_cm_node(cm_node);
1303 }
1304
1305 if (settimer) {
1306 spin_lock_irqsave(&cm_core->ht_lock, flags);
1307 if (!timer_pending(&cm_core->tcp_timer)) {
1308 cm_core->tcp_timer.expires = nexttimeout;
1309 add_timer(&cm_core->tcp_timer);
1310 }
1311 spin_unlock_irqrestore(&cm_core->ht_lock, flags);
1312 }
1313}
1314
1315/**
1316 * i40iw_send_syn - send SYN packet
1317 * @cm_node: connection's node
1318 * @sendack: flag to set ACK bit or not
1319 */
1320int i40iw_send_syn(struct i40iw_cm_node *cm_node, u32 sendack)
1321{
1322 struct i40iw_puda_buf *sqbuf;
1323 int flags = SET_SYN;
1324 char optionsbuffer[sizeof(struct option_mss) +
1325 sizeof(struct option_windowscale) +
1326 sizeof(struct option_base) + TCP_OPTIONS_PADDING];
1327 struct i40iw_kmem_info opts;
1328
1329 int optionssize = 0;
1330 /* Sending MSS option */
1331 union all_known_options *options;
1332
1333 opts.addr = optionsbuffer;
1334 if (!cm_node) {
1335 i40iw_pr_err("no cm_node\n");
1336 return -EINVAL;
1337 }
1338
1339 options = (union all_known_options *)&optionsbuffer[optionssize];
1340 options->as_mss.optionnum = OPTION_NUMBER_MSS;
1341 options->as_mss.length = sizeof(struct option_mss);
1342 options->as_mss.mss = htons(cm_node->tcp_cntxt.mss);
1343 optionssize += sizeof(struct option_mss);
1344
1345 options = (union all_known_options *)&optionsbuffer[optionssize];
1346 options->as_windowscale.optionnum = OPTION_NUMBER_WINDOW_SCALE;
1347 options->as_windowscale.length = sizeof(struct option_windowscale);
1348 options->as_windowscale.shiftcount = cm_node->tcp_cntxt.rcv_wscale;
1349 optionssize += sizeof(struct option_windowscale);
1350 options = (union all_known_options *)&optionsbuffer[optionssize];
1351 options->as_end = OPTION_NUMBER_END;
1352 optionssize += 1;
1353
1354 if (sendack)
1355 flags |= SET_ACK;
1356
1357 opts.size = optionssize;
1358
1359 sqbuf = i40iw_form_cm_frame(cm_node, &opts, NULL, NULL, flags);
1360 if (!sqbuf) {
1361 i40iw_pr_err("no sqbuf\n");
1362 return -1;
1363 }
1364 return i40iw_schedule_cm_timer(cm_node, sqbuf, I40IW_TIMER_TYPE_SEND, 1, 0);
1365}
1366
1367/**
1368 * i40iw_send_ack - Send ACK packet
1369 * @cm_node: connection's node
1370 */
1371static void i40iw_send_ack(struct i40iw_cm_node *cm_node)
1372{
1373 struct i40iw_puda_buf *sqbuf;
1374
1375 sqbuf = i40iw_form_cm_frame(cm_node, NULL, NULL, NULL, SET_ACK);
1376 if (sqbuf)
1377 i40iw_puda_send_buf(cm_node->dev->ilq, sqbuf);
1378 else
1379 i40iw_pr_err("no sqbuf\n");
1380}
1381
1382/**
1383 * i40iw_send_fin - Send FIN pkt
1384 * @cm_node: connection's node
1385 */
1386static int i40iw_send_fin(struct i40iw_cm_node *cm_node)
1387{
1388 struct i40iw_puda_buf *sqbuf;
1389
1390 sqbuf = i40iw_form_cm_frame(cm_node, NULL, NULL, NULL, SET_ACK | SET_FIN);
1391 if (!sqbuf) {
1392 i40iw_pr_err("no sqbuf\n");
1393 return -1;
1394 }
1395 return i40iw_schedule_cm_timer(cm_node, sqbuf, I40IW_TIMER_TYPE_SEND, 1, 0);
1396}
1397
1398/**
1399 * i40iw_find_node - find a cm node that matches the reference cm node
1400 * @cm_core: cm's core
1401 * @rem_port: remote tcp port num
1402 * @rem_addr: remote ip addr
1403 * @loc_port: local tcp port num
1404 * @loc_addr: loc ip addr
1405 * @add_refcnt: flag to increment refcount of cm_node
1406 */
1407struct i40iw_cm_node *i40iw_find_node(struct i40iw_cm_core *cm_core,
1408 u16 rem_port,
1409 u32 *rem_addr,
1410 u16 loc_port,
1411 u32 *loc_addr,
1412 bool add_refcnt)
1413{
1414 struct list_head *hte;
1415 struct i40iw_cm_node *cm_node;
1416 unsigned long flags;
1417
1418 hte = &cm_core->connected_nodes;
1419
1420 /* walk list and find cm_node associated with this session ID */
1421 spin_lock_irqsave(&cm_core->ht_lock, flags);
1422 list_for_each_entry(cm_node, hte, list) {
8d8cd0bf
FL		 1423 if (!memcmp(cm_node->loc_addr, loc_addr, sizeof(cm_node->loc_addr)) &&
1424 (cm_node->loc_port == loc_port) &&
1425 !memcmp(cm_node->rem_addr, rem_addr, sizeof(cm_node->rem_addr)) &&
1426 (cm_node->rem_port == rem_port)) {
f27b4746
FL		 1427 if (add_refcnt)
1428 atomic_inc(&cm_node->ref_count);
1429 spin_unlock_irqrestore(&cm_core->ht_lock, flags);
1430 return cm_node;
1431 }
1432 }
1433 spin_unlock_irqrestore(&cm_core->ht_lock, flags);
1434
1435 /* no owner node */
1436 return NULL;
1437}
1438
1439/**
1440 * i40iw_find_listener - find a cm node listening on this addr-port pair
1441 * @cm_core: cm's core
1442 * @dst_port: listener tcp port num
1443 * @dst_addr: listener ip addr
1444 * @listener_state: state to match with listen node's
1445 */
1446static struct i40iw_cm_listener *i40iw_find_listener(
1447 struct i40iw_cm_core *cm_core,
1448 u32 *dst_addr,
1449 u16 dst_port,
1450 u16 vlan_id,
1451 enum i40iw_cm_listener_state
8d8cd0bf 1452 listener_state)
f27b4746
FL		 1453{
1454 struct i40iw_cm_listener *listen_node;
1455 static const u32 ip_zero[4] = { 0, 0, 0, 0 };
1456 u32 listen_addr[4];
1457 u16 listen_port;
1458 unsigned long flags;
1459
1460 /* walk list and find cm_node associated with this session ID */
1461 spin_lock_irqsave(&cm_core->listen_list_lock, flags);
1462 list_for_each_entry(listen_node, &cm_core->listen_nodes, list) {
8d8cd0bf
FL		 1463 memcpy(listen_addr, listen_node->loc_addr, sizeof(listen_addr));
1464 listen_port = listen_node->loc_port;
f27b4746
FL		 1465 /* compare node pair, return node handle if a match */
1466 if ((!memcmp(listen_addr, dst_addr, sizeof(listen_addr)) ||
1467 !memcmp(listen_addr, ip_zero, sizeof(listen_addr))) &&
1468 (listen_port == dst_port) &&
1469 (listener_state & listen_node->listener_state)) {
1470 atomic_inc(&listen_node->ref_count);
1471 spin_unlock_irqrestore(&cm_core->listen_list_lock, flags);
1472 return listen_node;
1473 }
1474 }
1475 spin_unlock_irqrestore(&cm_core->listen_list_lock, flags);
1476 return NULL;
1477}
1478
1479/**
1480 * i40iw_add_hte_node - add a cm node to the hash table
1481 * @cm_core: cm's core
1482 * @cm_node: connection's node
1483 */
1484static void i40iw_add_hte_node(struct i40iw_cm_core *cm_core,
1485 struct i40iw_cm_node *cm_node)
1486{
1487 struct list_head *hte;
1488 unsigned long flags;
1489
1490 if (!cm_node || !cm_core) {
1491 i40iw_pr_err("cm_node or cm_core == NULL\n");
1492 return;
1493 }
1494 spin_lock_irqsave(&cm_core->ht_lock, flags);
1495
1496 /* get a handle on the hash table element (list head for this slot) */
1497 hte = &cm_core->connected_nodes;
1498 list_add_tail(&cm_node->list, hte);
1499 spin_unlock_irqrestore(&cm_core->ht_lock, flags);
1500}
1501
1502/**
1503 * listen_port_in_use - determine if port is in use
1504 * @port: Listen port number
1505 */
1506static bool i40iw_listen_port_in_use(struct i40iw_cm_core *cm_core, u16 port)
1507{
1508 struct i40iw_cm_listener *listen_node;
1509 unsigned long flags;
1510 bool ret = false;
1511
1512 spin_lock_irqsave(&cm_core->listen_list_lock, flags);
1513 list_for_each_entry(listen_node, &cm_core->listen_nodes, list) {
8d8cd0bf 1514 if (listen_node->loc_port == port) {
f27b4746
FL		 1515 ret = true;
1516 break;
1517 }
1518 }
1519 spin_unlock_irqrestore(&cm_core->listen_list_lock, flags);
1520 return ret;
1521}
1522
1523/**
1524 * i40iw_del_multiple_qhash - Remove qhash and child listens
1525 * @iwdev: iWarp device
1526 * @cm_info: CM info for parent listen node
1527 * @cm_parent_listen_node: The parent listen node
1528 */
1529static enum i40iw_status_code i40iw_del_multiple_qhash(
1530 struct i40iw_device *iwdev,
1531 struct i40iw_cm_info *cm_info,
1532 struct i40iw_cm_listener *cm_parent_listen_node)
1533{
1534 struct i40iw_cm_listener *child_listen_node;
1535 enum i40iw_status_code ret = I40IW_ERR_CONFIG;
1536 struct list_head *pos, *tpos;
1537 unsigned long flags;
1538
1539 spin_lock_irqsave(&iwdev->cm_core.listen_list_lock, flags);
1540 list_for_each_safe(pos, tpos, &cm_parent_listen_node->child_listen_list) {
1541 child_listen_node = list_entry(pos, struct i40iw_cm_listener, child_listen_list);
1542 if (child_listen_node->ipv4)
1543 i40iw_debug(&iwdev->sc_dev,
1544 I40IW_DEBUG_CM,
1545 "removing child listen for IP=%pI4, port=%d, vlan=%d\n",
1546 child_listen_node->loc_addr,
1547 child_listen_node->loc_port,
1548 child_listen_node->vlan_id);
1549 else
1550 i40iw_debug(&iwdev->sc_dev, I40IW_DEBUG_CM,
1551 "removing child listen for IP=%pI6, port=%d, vlan=%d\n",
1552 child_listen_node->loc_addr,
1553 child_listen_node->loc_port,
1554 child_listen_node->vlan_id);
1555 list_del(pos);
f27b4746
FL		 1556 memcpy(cm_info->loc_addr, child_listen_node->loc_addr,
1557 sizeof(cm_info->loc_addr));
1558 cm_info->vlan_id = child_listen_node->vlan_id;
1559 ret = i40iw_manage_qhash(iwdev, cm_info,
1560 I40IW_QHASH_TYPE_TCP_SYN,
1561 I40IW_QHASH_MANAGE_TYPE_DELETE, NULL, false);
f27b4746
FL		 1562 i40iw_debug(&iwdev->sc_dev,
1563 I40IW_DEBUG_CM,
1564 "freed pointer = %p\n",
1565 child_listen_node);
5ec11ed2
MI		 1566 kfree(child_listen_node);
1567 cm_parent_listen_node->cm_core->stats_listen_nodes_destroyed++;
f27b4746
FL		 1568 }
1569 spin_unlock_irqrestore(&iwdev->cm_core.listen_list_lock, flags);
1570
1571 return ret;
1572}
1573
1574/**
1575 * i40iw_netdev_vlan_ipv6 - Gets the netdev and mac
1576 * @addr: local IPv6 address
1577 * @vlan_id: vlan id for the given IPv6 address
1578 * @mac: mac address for the given IPv6 address
1579 *
1580 * Returns the net_device of the IPv6 address and also sets the
1581 * vlan id and mac for that address.
1582 */
1583static struct net_device *i40iw_netdev_vlan_ipv6(u32 *addr, u16 *vlan_id, u8 *mac)
1584{
1585 struct net_device *ip_dev = NULL;
1586#if IS_ENABLED(CONFIG_IPV6)
1587 struct in6_addr laddr6;
1588
1589 i40iw_copy_ip_htonl(laddr6.in6_u.u6_addr32, addr);
1590 if (vlan_id)
1591 *vlan_id = I40IW_NO_VLAN;
1592 if (mac)
1593 eth_zero_addr(mac);
1594 rcu_read_lock();
1595 for_each_netdev_rcu(&init_net, ip_dev) {
1596 if (ipv6_chk_addr(&init_net, &laddr6, ip_dev, 1)) {
1597 if (vlan_id)
1598 *vlan_id = rdma_vlan_dev_vlan_id(ip_dev);
1599 if (ip_dev->dev_addr && mac)
1600 ether_addr_copy(mac, ip_dev->dev_addr);
1601 break;
1602 }
1603 }
1604 rcu_read_unlock();
1605#endif
1606 return ip_dev;
1607}
1608
1609/**
1610 * i40iw_get_vlan_ipv4 - Returns the vlan_id for IPv4 address
1611 * @addr: local IPv4 address
1612 */
1613static u16 i40iw_get_vlan_ipv4(u32 *addr)
1614{
1615 struct net_device *netdev;
1616 u16 vlan_id = I40IW_NO_VLAN;
1617
1618 netdev = ip_dev_find(&init_net, htonl(addr[0]));
1619 if (netdev) {
1620 vlan_id = rdma_vlan_dev_vlan_id(netdev);
1621 dev_put(netdev);
1622 }
1623 return vlan_id;
1624}
1625
1626/**
1627 * i40iw_add_mqh_6 - Adds multiple qhashes for IPv6
1628 * @iwdev: iWarp device
1629 * @cm_info: CM info for parent listen node
1630 * @cm_parent_listen_node: The parent listen node
1631 *
1632 * Adds a qhash and a child listen node for every IPv6 address
1633 * on the adapter and adds the associated qhash filter
1634 */
1635static enum i40iw_status_code i40iw_add_mqh_6(struct i40iw_device *iwdev,
1636 struct i40iw_cm_info *cm_info,
1637 struct i40iw_cm_listener *cm_parent_listen_node)
1638{
1639 struct net_device *ip_dev;
1640 struct inet6_dev *idev;
1641 struct inet6_ifaddr *ifp;
1642 enum i40iw_status_code ret = 0;
1643 struct i40iw_cm_listener *child_listen_node;
1644 unsigned long flags;
1645
1646 rtnl_lock();
1647 for_each_netdev_rcu(&init_net, ip_dev) {
1648 if ((((rdma_vlan_dev_vlan_id(ip_dev) < I40IW_NO_VLAN) &&
1649 (rdma_vlan_dev_real_dev(ip_dev) == iwdev->netdev)) ||
1650 (ip_dev == iwdev->netdev)) && (ip_dev->flags & IFF_UP)) {
1651 idev = __in6_dev_get(ip_dev);
1652 if (!idev) {
1653 i40iw_pr_err("idev == NULL\n");
1654 break;
1655 }
1656 list_for_each_entry(ifp, &idev->addr_list, if_list) {
1657 i40iw_debug(&iwdev->sc_dev,
1658 I40IW_DEBUG_CM,
1659 "IP=%pI6, vlan_id=%d, MAC=%pM\n",
1660 &ifp->addr,
1661 rdma_vlan_dev_vlan_id(ip_dev),
1662 ip_dev->dev_addr);
1663 child_listen_node =
1664 kzalloc(sizeof(*child_listen_node), GFP_ATOMIC);
1665 i40iw_debug(&iwdev->sc_dev,
1666 I40IW_DEBUG_CM,
1667 "Allocating child listener %p\n",
1668 child_listen_node);
1669 if (!child_listen_node) {
1670 i40iw_pr_err("listener memory allocation\n");
1671 ret = I40IW_ERR_NO_MEMORY;
1672 goto exit;
1673 }
1674 cm_info->vlan_id = rdma_vlan_dev_vlan_id(ip_dev);
1675 cm_parent_listen_node->vlan_id = cm_info->vlan_id;
1676
1677 memcpy(child_listen_node, cm_parent_listen_node,
1678 sizeof(*child_listen_node));
1679
1680 i40iw_copy_ip_ntohl(child_listen_node->loc_addr,
1681 ifp->addr.in6_u.u6_addr32);
f27b4746
FL		 1682 memcpy(cm_info->loc_addr, child_listen_node->loc_addr,
1683 sizeof(cm_info->loc_addr));
1684
1685 ret = i40iw_manage_qhash(iwdev, cm_info,
1686 I40IW_QHASH_TYPE_TCP_SYN,
1687 I40IW_QHASH_MANAGE_TYPE_ADD,
1688 NULL, true);
1689 if (!ret) {
1690 spin_lock_irqsave(&iwdev->cm_core.listen_list_lock, flags);
1691 list_add(&child_listen_node->child_listen_list,
1692 &cm_parent_listen_node->child_listen_list);
1693 spin_unlock_irqrestore(&iwdev->cm_core.listen_list_lock, flags);
1694 cm_parent_listen_node->cm_core->stats_listen_nodes_created++;
1695 } else {
1696 kfree(child_listen_node);
1697 }
1698 }
1699 }
1700 }
1701exit:
1702 rtnl_unlock();
1703 return ret;
1704}
1705
1706/**
1707 * i40iw_add_mqh_4 - Adds multiple qhashes for IPv4
1708 * @iwdev: iWarp device
1709 * @cm_info: CM info for parent listen node
1710 * @cm_parent_listen_node: The parent listen node
1711 *
1712 * Adds a qhash and a child listen node for every IPv4 address
1713 * on the adapter and adds the associated qhash filter
1714 */
1715static enum i40iw_status_code i40iw_add_mqh_4(
1716 struct i40iw_device *iwdev,
1717 struct i40iw_cm_info *cm_info,
1718 struct i40iw_cm_listener *cm_parent_listen_node)
1719{
1720 struct net_device *dev;
1721 struct in_device *idev;
1722 struct i40iw_cm_listener *child_listen_node;
1723 enum i40iw_status_code ret = 0;
1724 unsigned long flags;
1725
1726 rtnl_lock();
1727 for_each_netdev(&init_net, dev) {
1728 if ((((rdma_vlan_dev_vlan_id(dev) < I40IW_NO_VLAN) &&
1729 (rdma_vlan_dev_real_dev(dev) == iwdev->netdev)) ||
1730 (dev == iwdev->netdev)) && (dev->flags & IFF_UP)) {
1731 idev = in_dev_get(dev);
1732 for_ifa(idev) {
1733 i40iw_debug(&iwdev->sc_dev,
1734 I40IW_DEBUG_CM,
1735 "Allocating child CM Listener forIP=%pI4, vlan_id=%d, MAC=%pM\n",
1736 &ifa->ifa_address,
1737 rdma_vlan_dev_vlan_id(dev),
1738 dev->dev_addr);
1739 child_listen_node = kzalloc(sizeof(*child_listen_node), GFP_ATOMIC);
1740 cm_parent_listen_node->cm_core->stats_listen_nodes_created++;
1741 i40iw_debug(&iwdev->sc_dev,
1742 I40IW_DEBUG_CM,
1743 "Allocating child listener %p\n",
1744 child_listen_node);
1745 if (!child_listen_node) {
1746 i40iw_pr_err("listener memory allocation\n");
1747 in_dev_put(idev);
1748 ret = I40IW_ERR_NO_MEMORY;
1749 goto exit;
1750 }
1751 cm_info->vlan_id = rdma_vlan_dev_vlan_id(dev);
1752 cm_parent_listen_node->vlan_id = cm_info->vlan_id;
1753 memcpy(child_listen_node,
1754 cm_parent_listen_node,
1755 sizeof(*child_listen_node));
1756
1757 child_listen_node->loc_addr[0] = ntohl(ifa->ifa_address);
f27b4746
FL		 1758 memcpy(cm_info->loc_addr, child_listen_node->loc_addr,
1759 sizeof(cm_info->loc_addr));
1760
1761 ret = i40iw_manage_qhash(iwdev,
1762 cm_info,
1763 I40IW_QHASH_TYPE_TCP_SYN,
1764 I40IW_QHASH_MANAGE_TYPE_ADD,
1765 NULL,
1766 true);
1767 if (!ret) {
1768 spin_lock_irqsave(&iwdev->cm_core.listen_list_lock, flags);
1769 list_add(&child_listen_node->child_listen_list,
1770 &cm_parent_listen_node->child_listen_list);
1771 spin_unlock_irqrestore(&iwdev->cm_core.listen_list_lock, flags);
1772 } else {
1773 kfree(child_listen_node);
1774 cm_parent_listen_node->cm_core->stats_listen_nodes_created--;
1775 }
1776 }
1777 endfor_ifa(idev);
1778 in_dev_put(idev);
1779 }
1780 }
1781exit:
1782 rtnl_unlock();
1783 return ret;
1784}
1785
1786/**
1787 * i40iw_dec_refcnt_listen - delete listener and associated cm nodes
1788 * @cm_core: cm's core
1789 * @free_hanging_nodes: to free associated cm_nodes
1790 * @apbvt_del: flag to delete the apbvt
1791 */
1792static int i40iw_dec_refcnt_listen(struct i40iw_cm_core *cm_core,
1793 struct i40iw_cm_listener *listener,
1794 int free_hanging_nodes, bool apbvt_del)
1795{
1796 int ret = -EINVAL;
1797 int err = 0;
1798 struct list_head *list_pos;
1799 struct list_head *list_temp;
1800 struct i40iw_cm_node *cm_node;
1801 struct list_head reset_list;
1802 struct i40iw_cm_info nfo;
1803 struct i40iw_cm_node *loopback;
1804 enum i40iw_cm_node_state old_state;
1805 unsigned long flags;
1806
1807 /* free non-accelerated child nodes for this listener */
1808 INIT_LIST_HEAD(&reset_list);
1809 if (free_hanging_nodes) {
1810 spin_lock_irqsave(&cm_core->ht_lock, flags);
1811 list_for_each_safe(list_pos, list_temp, &cm_core->connected_nodes) {
1812 cm_node = container_of(list_pos, struct i40iw_cm_node, list);
1813 if ((cm_node->listener == listener) && !cm_node->accelerated) {
1814 atomic_inc(&cm_node->ref_count);
1815 list_add(&cm_node->reset_entry, &reset_list);
1816 }
1817 }
1818 spin_unlock_irqrestore(&cm_core->ht_lock, flags);
1819 }
1820
1821 list_for_each_safe(list_pos, list_temp, &reset_list) {
1822 cm_node = container_of(list_pos, struct i40iw_cm_node, reset_entry);
1823 loopback = cm_node->loopbackpartner;
1824 if (cm_node->state >= I40IW_CM_STATE_FIN_WAIT1) {
1825 i40iw_rem_ref_cm_node(cm_node);
1826 } else {
1827 if (!loopback) {
1828 i40iw_cleanup_retrans_entry(cm_node);
1829 err = i40iw_send_reset(cm_node);
1830 if (err) {
1831 cm_node->state = I40IW_CM_STATE_CLOSED;
1832 i40iw_pr_err("send reset\n");
1833 } else {
1834 old_state = cm_node->state;
1835 cm_node->state = I40IW_CM_STATE_LISTENER_DESTROYED;
1836 if (old_state != I40IW_CM_STATE_MPAREQ_RCVD)
1837 i40iw_rem_ref_cm_node(cm_node);
1838 }
1839 } else {
1840 struct i40iw_cm_event event;
1841
1842 event.cm_node = loopback;
1843 memcpy(event.cm_info.rem_addr,
1844 loopback->rem_addr, sizeof(event.cm_info.rem_addr));
1845 memcpy(event.cm_info.loc_addr,
1846 loopback->loc_addr, sizeof(event.cm_info.loc_addr));
1847 event.cm_info.rem_port = loopback->rem_port;
1848 event.cm_info.loc_port = loopback->loc_port;
1849 event.cm_info.cm_id = loopback->cm_id;
1850 event.cm_info.ipv4 = loopback->ipv4;
1851 atomic_inc(&loopback->ref_count);
1852 loopback->state = I40IW_CM_STATE_CLOSED;
1853 i40iw_event_connect_error(&event);
1854 cm_node->state = I40IW_CM_STATE_LISTENER_DESTROYED;
1855 i40iw_rem_ref_cm_node(cm_node);
1856 }
1857 }
1858 }
1859
1860 if (!atomic_dec_return(&listener->ref_count)) {
1861 spin_lock_irqsave(&cm_core->listen_list_lock, flags);
1862 list_del(&listener->list);
1863 spin_unlock_irqrestore(&cm_core->listen_list_lock, flags);
1864
1865 if (listener->iwdev) {
8d8cd0bf 1866 if (apbvt_del && !i40iw_listen_port_in_use(cm_core, listener->loc_port))
f27b4746 1867 i40iw_manage_apbvt(listener->iwdev,
8d8cd0bf 1868 listener->loc_port,
f27b4746
FL		 1869 I40IW_MANAGE_APBVT_DEL);
1870
1871 memcpy(nfo.loc_addr, listener->loc_addr, sizeof(nfo.loc_addr));
f27b4746 1872 nfo.loc_port = listener->loc_port;
f27b4746
FL		 1873 nfo.ipv4 = listener->ipv4;
1874 nfo.vlan_id = listener->vlan_id;
0fc2dc58 1875 nfo.user_pri = listener->user_pri;
f27b4746 1876
f27b4746
FL		 1877 if (!list_empty(&listener->child_listen_list)) {
1878 i40iw_del_multiple_qhash(listener->iwdev, &nfo, listener);
1879 } else {
1880 if (listener->qhash_set)
1881 i40iw_manage_qhash(listener->iwdev,
1882 &nfo,
1883 I40IW_QHASH_TYPE_TCP_SYN,
1884 I40IW_QHASH_MANAGE_TYPE_DELETE,
1885 NULL,
1886 false);
1887 }
1888 }
1889
1890 cm_core->stats_listen_destroyed++;
1891 kfree(listener);
1892 cm_core->stats_listen_nodes_destroyed++;
1893 listener = NULL;
1894 ret = 0;
1895 }
1896
1897 if (listener) {
1898 if (atomic_read(&listener->pend_accepts_cnt) > 0)
1899 i40iw_debug(cm_core->dev,
1900 I40IW_DEBUG_CM,
1901 "%s: listener (%p) pending accepts=%u\n",
1902 __func__,
1903 listener,
1904 atomic_read(&listener->pend_accepts_cnt));
1905 }
1906
1907 return ret;
1908}
1909
1910/**
1911 * i40iw_cm_del_listen - delete a linstener
1912 * @cm_core: cm's core
1913 * @listener: passive connection's listener
1914 * @apbvt_del: flag to delete apbvt
1915 */
1916static int i40iw_cm_del_listen(struct i40iw_cm_core *cm_core,
1917 struct i40iw_cm_listener *listener,
1918 bool apbvt_del)
1919{
1920 listener->listener_state = I40IW_CM_LISTENER_PASSIVE_STATE;
1921 listener->cm_id = NULL; /* going to be destroyed pretty soon */
1922 return i40iw_dec_refcnt_listen(cm_core, listener, 1, apbvt_del);
1923}
1924
1925/**
1926 * i40iw_addr_resolve_neigh - resolve neighbor address
1927 * @iwdev: iwarp device structure
1928 * @src_ip: local ip address
1929 * @dst_ip: remote ip address
1930 * @arpindex: if there is an arp entry
1931 */
1932static int i40iw_addr_resolve_neigh(struct i40iw_device *iwdev,
1933 u32 src_ip,
1934 u32 dst_ip,
1935 int arpindex)
1936{
1937 struct rtable *rt;
1938 struct neighbour *neigh;
1939 int rc = arpindex;
1940 struct net_device *netdev = iwdev->netdev;
1941 __be32 dst_ipaddr = htonl(dst_ip);
1942 __be32 src_ipaddr = htonl(src_ip);
1943
1944 rt = ip_route_output(&init_net, dst_ipaddr, src_ipaddr, 0, 0);
1945 if (IS_ERR(rt)) {
1946 i40iw_pr_err("ip_route_output\n");
1947 return rc;
1948 }
1949
1950 if (netif_is_bond_slave(netdev))
1951 netdev = netdev_master_upper_dev_get(netdev);
1952
1953 neigh = dst_neigh_lookup(&rt->dst, &dst_ipaddr);
1954
1955 rcu_read_lock();
1956 if (neigh) {
1957 if (neigh->nud_state & NUD_VALID) {
1958 if (arpindex >= 0) {
1959 if (ether_addr_equal(iwdev->arp_table[arpindex].mac_addr,
1960 neigh->ha))
1961 /* Mac address same as arp table */
1962 goto resolve_neigh_exit;
1963 i40iw_manage_arp_cache(iwdev,
1964 iwdev->arp_table[arpindex].mac_addr,
1965 &dst_ip,
1966 true,
1967 I40IW_ARP_DELETE);
1968 }
1969
1970 i40iw_manage_arp_cache(iwdev, neigh->ha, &dst_ip, true, I40IW_ARP_ADD);
1971 rc = i40iw_arp_table(iwdev, &dst_ip, true, NULL, I40IW_ARP_RESOLVE);
1972 } else {
1973 neigh_event_send(neigh, NULL);
1974 }
1975 }
1976 resolve_neigh_exit:
1977
1978 rcu_read_unlock();
1979 if (neigh)
1980 neigh_release(neigh);
1981
1982 ip_rt_put(rt);
1983 return rc;
1984}
1985
1986/**
1987 * i40iw_get_dst_ipv6
1988 */
f27b4746
FL		 1989static struct dst_entry *i40iw_get_dst_ipv6(struct sockaddr_in6 *src_addr,
1990 struct sockaddr_in6 *dst_addr)
1991{
1992 struct dst_entry *dst;
1993 struct flowi6 fl6;
1994
1995 memset(&fl6, 0, sizeof(fl6));
1996 fl6.daddr = dst_addr->sin6_addr;
1997 fl6.saddr = src_addr->sin6_addr;
1998 if (ipv6_addr_type(&fl6.daddr) & IPV6_ADDR_LINKLOCAL)
1999 fl6.flowi6_oif = dst_addr->sin6_scope_id;
2000
2001 dst = ip6_route_output(&init_net, NULL, &fl6);
2002 return dst;
2003}
f27b4746
FL		 2004
2005/**
2006 * i40iw_addr_resolve_neigh_ipv6 - resolve neighbor ipv6 address
2007 * @iwdev: iwarp device structure
2008 * @dst_ip: remote ip address
2009 * @arpindex: if there is an arp entry
2010 */
f27b4746
FL		 2011static int i40iw_addr_resolve_neigh_ipv6(struct i40iw_device *iwdev,
2012 u32 *src,
2013 u32 *dest,
2014 int arpindex)
2015{
2016 struct neighbour *neigh;
2017 int rc = arpindex;
2018 struct net_device *netdev = iwdev->netdev;
2019 struct dst_entry *dst;
2020 struct sockaddr_in6 dst_addr;
2021 struct sockaddr_in6 src_addr;
2022
2023 memset(&dst_addr, 0, sizeof(dst_addr));
2024 dst_addr.sin6_family = AF_INET6;
2025 i40iw_copy_ip_htonl(dst_addr.sin6_addr.in6_u.u6_addr32, dest);
2026 memset(&src_addr, 0, sizeof(src_addr));
2027 src_addr.sin6_family = AF_INET6;
2028 i40iw_copy_ip_htonl(src_addr.sin6_addr.in6_u.u6_addr32, src);
2029 dst = i40iw_get_dst_ipv6(&src_addr, &dst_addr);
2030 if (!dst || dst->error) {
2031 if (dst) {
2032 dst_release(dst);
2033 i40iw_pr_err("ip6_route_output returned dst->error = %d\n",
2034 dst->error);
2035 }
2036 return rc;
2037 }
2038
2039 if (netif_is_bond_slave(netdev))
2040 netdev = netdev_master_upper_dev_get(netdev);
2041
2042 neigh = dst_neigh_lookup(dst, &dst_addr);
2043
2044 rcu_read_lock();
2045 if (neigh) {
2046 i40iw_debug(&iwdev->sc_dev, I40IW_DEBUG_CM, "dst_neigh_lookup MAC=%pM\n", neigh->ha);
2047 if (neigh->nud_state & NUD_VALID) {
2048 if (arpindex >= 0) {
2049 if (ether_addr_equal
2050 (iwdev->arp_table[arpindex].mac_addr,
2051 neigh->ha)) {
2052 /* Mac address same as in arp table */
2053 goto resolve_neigh_exit6;
2054 }
2055 i40iw_manage_arp_cache(iwdev,
2056 iwdev->arp_table[arpindex].mac_addr,
2057 dest,
2058 false,
2059 I40IW_ARP_DELETE);
2060 }
2061 i40iw_manage_arp_cache(iwdev,
2062 neigh->ha,
2063 dest,
2064 false,
2065 I40IW_ARP_ADD);
2066 rc = i40iw_arp_table(iwdev,
2067 dest,
2068 false,
2069 NULL,
2070 I40IW_ARP_RESOLVE);
2071 } else {
2072 neigh_event_send(neigh, NULL);
2073 }
2074 }
2075
2076 resolve_neigh_exit6:
2077 rcu_read_unlock();
2078 if (neigh)
2079 neigh_release(neigh);
2080 dst_release(dst);
2081 return rc;
2082}
f27b4746
FL		 2083
2084/**
2085 * i40iw_ipv4_is_loopback - check if loopback
2086 * @loc_addr: local addr to compare
2087 * @rem_addr: remote address
2088 */
2089static bool i40iw_ipv4_is_loopback(u32 loc_addr, u32 rem_addr)
2090{
2091 return ipv4_is_loopback(htonl(rem_addr)) || (loc_addr == rem_addr);
2092}
2093
2094/**
2095 * i40iw_ipv6_is_loopback - check if loopback
2096 * @loc_addr: local addr to compare
2097 * @rem_addr: remote address
2098 */
2099static bool i40iw_ipv6_is_loopback(u32 *loc_addr, u32 *rem_addr)
2100{
2101 struct in6_addr raddr6;
2102
2103 i40iw_copy_ip_htonl(raddr6.in6_u.u6_addr32, rem_addr);
f606d893 2104 return !memcmp(loc_addr, rem_addr, 16) || ipv6_addr_loopback(&raddr6);
f27b4746
FL		 2105}
2106
2107/**
2108 * i40iw_make_cm_node - create a new instance of a cm node
2109 * @cm_core: cm's core
2110 * @iwdev: iwarp device structure
2111 * @cm_info: quad info for connection
2112 * @listener: passive connection's listener
2113 */
2114static struct i40iw_cm_node *i40iw_make_cm_node(
2115 struct i40iw_cm_core *cm_core,
2116 struct i40iw_device *iwdev,
2117 struct i40iw_cm_info *cm_info,
2118 struct i40iw_cm_listener *listener)
2119{
2120 struct i40iw_cm_node *cm_node;
2121 struct timespec ts;
2122 int oldarpindex;
2123 int arpindex;
2124 struct net_device *netdev = iwdev->netdev;
2125
2126 /* create an hte and cm_node for this instance */
2127 cm_node = kzalloc(sizeof(*cm_node), GFP_ATOMIC);
2128 if (!cm_node)
2129 return NULL;
2130
2131 /* set our node specific transport info */
2132 cm_node->ipv4 = cm_info->ipv4;
2133 cm_node->vlan_id = cm_info->vlan_id;
0fc2dc58
HO		 2134 if ((cm_node->vlan_id == I40IW_NO_VLAN) && iwdev->dcb)
2135 cm_node->vlan_id = 0;
2136 cm_node->user_pri = cm_info->user_pri;
2137 if (listener)
2138 cm_node->user_pri = listener->user_pri;
f27b4746
FL		 2139 memcpy(cm_node->loc_addr, cm_info->loc_addr, sizeof(cm_node->loc_addr));
2140 memcpy(cm_node->rem_addr, cm_info->rem_addr, sizeof(cm_node->rem_addr));
f27b4746
FL		 2141 cm_node->loc_port = cm_info->loc_port;
2142 cm_node->rem_port = cm_info->rem_port;
f27b4746
FL		 2143
2144 cm_node->mpa_frame_rev = iwdev->mpa_version;
2145 cm_node->send_rdma0_op = SEND_RDMA_READ_ZERO;
2146 cm_node->ird_size = I40IW_MAX_IRD_SIZE;
2147 cm_node->ord_size = I40IW_MAX_ORD_SIZE;
2148
2149 cm_node->listener = listener;
2150 cm_node->cm_id = cm_info->cm_id;
2151 ether_addr_copy(cm_node->loc_mac, netdev->dev_addr);
2152 spin_lock_init(&cm_node->retrans_list_lock);
2153
2154 atomic_set(&cm_node->ref_count, 1);
2155 /* associate our parent CM core */
2156 cm_node->cm_core = cm_core;
2157 cm_node->tcp_cntxt.loc_id = I40IW_CM_DEF_LOCAL_ID;
2158 cm_node->tcp_cntxt.rcv_wscale = I40IW_CM_DEFAULT_RCV_WND_SCALE;
2159 cm_node->tcp_cntxt.rcv_wnd =
2160 I40IW_CM_DEFAULT_RCV_WND_SCALED >> I40IW_CM_DEFAULT_RCV_WND_SCALE;
2161 ts = current_kernel_time();
20c61f7e 2162 cm_node->tcp_cntxt.loc_seq_num = ts.tv_nsec;
f27b4746
FL		 2163 cm_node->tcp_cntxt.mss = iwdev->mss;
2164
2165 cm_node->iwdev = iwdev;
2166 cm_node->dev = &iwdev->sc_dev;
2167
2168 if ((cm_node->ipv4 &&
2169 i40iw_ipv4_is_loopback(cm_node->loc_addr[0], cm_node->rem_addr[0])) ||
2170 (!cm_node->ipv4 && i40iw_ipv6_is_loopback(cm_node->loc_addr,
2171 cm_node->rem_addr))) {
2172 arpindex = i40iw_arp_table(iwdev,
8d8cd0bf 2173 cm_node->rem_addr,
f27b4746
FL		 2174 false,
2175 NULL,
2176 I40IW_ARP_RESOLVE);
2177 } else {
2178 oldarpindex = i40iw_arp_table(iwdev,
8d8cd0bf 2179 cm_node->rem_addr,
f27b4746
FL		 2180 false,
2181 NULL,
2182 I40IW_ARP_RESOLVE);
2183 if (cm_node->ipv4)
2184 arpindex = i40iw_addr_resolve_neigh(iwdev,
8d8cd0bf
FL		 2185 cm_info->loc_addr[0],
2186 cm_info->rem_addr[0],
f27b4746 2187 oldarpindex);
2fe78571 2188 else if (IS_ENABLED(CONFIG_IPV6))
f27b4746 2189 arpindex = i40iw_addr_resolve_neigh_ipv6(iwdev,
8d8cd0bf
FL		 2190 cm_info->loc_addr,
2191 cm_info->rem_addr,
f27b4746 2192 oldarpindex);
2fe78571
AB		 2193 else
2194 arpindex = -EINVAL;
f27b4746
FL		 2195 }
2196 if (arpindex < 0) {
2197 i40iw_pr_err("cm_node arpindex\n");
2198 kfree(cm_node);
2199 return NULL;
2200 }
2201 ether_addr_copy(cm_node->rem_mac, iwdev->arp_table[arpindex].mac_addr);
2202 i40iw_add_hte_node(cm_core, cm_node);
2203 cm_core->stats_nodes_created++;
2204 return cm_node;
2205}
2206
2207/**
2208 * i40iw_rem_ref_cm_node - destroy an instance of a cm node
2209 * @cm_node: connection's node
2210 */
2211static void i40iw_rem_ref_cm_node(struct i40iw_cm_node *cm_node)
2212{
2213 struct i40iw_cm_core *cm_core = cm_node->cm_core;
2214 struct i40iw_qp *iwqp;
2215 struct i40iw_cm_info nfo;
2216 unsigned long flags;
2217
2218 spin_lock_irqsave(&cm_node->cm_core->ht_lock, flags);
2219 if (atomic_dec_return(&cm_node->ref_count)) {
2220 spin_unlock_irqrestore(&cm_node->cm_core->ht_lock, flags);
2221 return;
2222 }
2223 list_del(&cm_node->list);
2224 spin_unlock_irqrestore(&cm_node->cm_core->ht_lock, flags);
2225
2226 /* if the node is destroyed before connection was accelerated */
2227 if (!cm_node->accelerated && cm_node->accept_pend) {
2228 pr_err("node destroyed before established\n");
2229 atomic_dec(&cm_node->listener->pend_accepts_cnt);
2230 }
2231 if (cm_node->close_entry)
2232 i40iw_handle_close_entry(cm_node, 0);
2233 if (cm_node->listener) {
2234 i40iw_dec_refcnt_listen(cm_core, cm_node->listener, 0, true);
2235 } else {
20c61f7e 2236 if (!i40iw_listen_port_in_use(cm_core, cm_node->loc_port) &&
f27b4746
FL		 2237 cm_node->apbvt_set && cm_node->iwdev) {
2238 i40iw_manage_apbvt(cm_node->iwdev,
8d8cd0bf 2239 cm_node->loc_port,
f27b4746
FL		 2240 I40IW_MANAGE_APBVT_DEL);
2241 i40iw_get_addr_info(cm_node, &nfo);
f27b4746
FL		 2242 if (cm_node->qhash_set) {
2243 i40iw_manage_qhash(cm_node->iwdev,
2244 &nfo,
2245 I40IW_QHASH_TYPE_TCP_ESTABLISHED,
2246 I40IW_QHASH_MANAGE_TYPE_DELETE,
2247 NULL,
2248 false);
2249 cm_node->qhash_set = 0;
2250 }
2251 }
2252 }
2253
2254 iwqp = cm_node->iwqp;
2255 if (iwqp) {
2256 iwqp->cm_node = NULL;
2257 i40iw_rem_ref(&iwqp->ibqp);
2258 cm_node->iwqp = NULL;
2259 } else if (cm_node->qhash_set) {
2260 i40iw_get_addr_info(cm_node, &nfo);
f27b4746
FL		 2261 i40iw_manage_qhash(cm_node->iwdev,
2262 &nfo,
2263 I40IW_QHASH_TYPE_TCP_ESTABLISHED,
2264 I40IW_QHASH_MANAGE_TYPE_DELETE,
2265 NULL,
2266 false);
2267 cm_node->qhash_set = 0;
2268 }
2269
2270 cm_node->cm_core->stats_nodes_destroyed++;
2271 kfree(cm_node);
2272}
2273
2274/**
2275 * i40iw_handle_fin_pkt - FIN packet received
2276 * @cm_node: connection's node
2277 */
2278static void i40iw_handle_fin_pkt(struct i40iw_cm_node *cm_node)
2279{
2280 u32 ret;
2281
2282 switch (cm_node->state) {
2283 case I40IW_CM_STATE_SYN_RCVD:
2284 case I40IW_CM_STATE_SYN_SENT:
2285 case I40IW_CM_STATE_ESTABLISHED:
2286 case I40IW_CM_STATE_MPAREJ_RCVD:
2287 cm_node->tcp_cntxt.rcv_nxt++;
2288 i40iw_cleanup_retrans_entry(cm_node);
2289 cm_node->state = I40IW_CM_STATE_LAST_ACK;
2290 i40iw_send_fin(cm_node);
2291 break;
2292 case I40IW_CM_STATE_MPAREQ_SENT:
2293 i40iw_create_event(cm_node, I40IW_CM_EVENT_ABORTED);
2294 cm_node->tcp_cntxt.rcv_nxt++;
2295 i40iw_cleanup_retrans_entry(cm_node);
2296 cm_node->state = I40IW_CM_STATE_CLOSED;
2297 atomic_inc(&cm_node->ref_count);
2298 i40iw_send_reset(cm_node);
2299 break;
2300 case I40IW_CM_STATE_FIN_WAIT1:
2301 cm_node->tcp_cntxt.rcv_nxt++;
2302 i40iw_cleanup_retrans_entry(cm_node);
2303 cm_node->state = I40IW_CM_STATE_CLOSING;
2304 i40iw_send_ack(cm_node);
2305 /*
2306 * Wait for ACK as this is simultaneous close.
2307 * After we receive ACK, do not send anything.
2308 * Just rm the node.
2309 */
2310 break;
2311 case I40IW_CM_STATE_FIN_WAIT2:
2312 cm_node->tcp_cntxt.rcv_nxt++;
2313 i40iw_cleanup_retrans_entry(cm_node);
2314 cm_node->state = I40IW_CM_STATE_TIME_WAIT;
2315 i40iw_send_ack(cm_node);
2316 ret =
2317 i40iw_schedule_cm_timer(cm_node, NULL, I40IW_TIMER_TYPE_CLOSE, 1, 0);
2318 if (ret)
2319 i40iw_pr_err("node %p state = %d\n", cm_node, cm_node->state);
2320 break;
2321 case I40IW_CM_STATE_TIME_WAIT:
2322 cm_node->tcp_cntxt.rcv_nxt++;
2323 i40iw_cleanup_retrans_entry(cm_node);
2324 cm_node->state = I40IW_CM_STATE_CLOSED;
2325 i40iw_rem_ref_cm_node(cm_node);
2326 break;
2327 case I40IW_CM_STATE_OFFLOADED:
2328 default:
2329 i40iw_pr_err("bad state node %p state = %d\n", cm_node, cm_node->state);
2330 break;
2331 }
2332}
2333
2334/**
2335 * i40iw_handle_rst_pkt - process received RST packet
2336 * @cm_node: connection's node
2337 * @rbuf: receive buffer
2338 */
2339static void i40iw_handle_rst_pkt(struct i40iw_cm_node *cm_node,
2340 struct i40iw_puda_buf *rbuf)
2341{
2342 i40iw_cleanup_retrans_entry(cm_node);
2343 switch (cm_node->state) {
2344 case I40IW_CM_STATE_SYN_SENT:
2345 case I40IW_CM_STATE_MPAREQ_SENT:
2346 switch (cm_node->mpa_frame_rev) {
2347 case IETF_MPA_V2:
2348 cm_node->mpa_frame_rev = IETF_MPA_V1;
2349 /* send a syn and goto syn sent state */
2350 cm_node->state = I40IW_CM_STATE_SYN_SENT;
2351 if (i40iw_send_syn(cm_node, 0))
2352 i40iw_active_open_err(cm_node, false);
2353 break;
2354 case IETF_MPA_V1:
2355 default:
2356 i40iw_active_open_err(cm_node, false);
2357 break;
2358 }
2359 break;
2360 case I40IW_CM_STATE_MPAREQ_RCVD:
2361 atomic_add_return(1, &cm_node->passive_state);
2362 break;
2363 case I40IW_CM_STATE_ESTABLISHED:
2364 case I40IW_CM_STATE_SYN_RCVD:
2365 case I40IW_CM_STATE_LISTENING:
2366 i40iw_pr_err("Bad state state = %d\n", cm_node->state);
2367 i40iw_passive_open_err(cm_node, false);
2368 break;
2369 case I40IW_CM_STATE_OFFLOADED:
2370 i40iw_active_open_err(cm_node, false);
2371 break;
2372 case I40IW_CM_STATE_CLOSED:
2373 break;
2374 case I40IW_CM_STATE_FIN_WAIT2:
2375 case I40IW_CM_STATE_FIN_WAIT1:
2376 case I40IW_CM_STATE_LAST_ACK:
2377 cm_node->cm_id->rem_ref(cm_node->cm_id);
2378 case I40IW_CM_STATE_TIME_WAIT:
2379 cm_node->state = I40IW_CM_STATE_CLOSED;
2380 i40iw_rem_ref_cm_node(cm_node);
2381 break;
2382 default:
2383 break;
2384 }
2385}
2386
2387/**
2388 * i40iw_handle_rcv_mpa - Process a recv'd mpa buffer
2389 * @cm_node: connection's node
2390 * @rbuf: receive buffer
2391 */
2392static void i40iw_handle_rcv_mpa(struct i40iw_cm_node *cm_node,
2393 struct i40iw_puda_buf *rbuf)
2394{
2395 int ret;
2396 int datasize = rbuf->datalen;
2397 u8 *dataloc = rbuf->data;
2398
2399 enum i40iw_cm_event_type type = I40IW_CM_EVENT_UNKNOWN;
2400 u32 res_type;
2401
2402 ret = i40iw_parse_mpa(cm_node, dataloc, &res_type, datasize);
2403 if (ret) {
2404 if (cm_node->state == I40IW_CM_STATE_MPAREQ_SENT)
2405 i40iw_active_open_err(cm_node, true);
2406 else
2407 i40iw_passive_open_err(cm_node, true);
2408 return;
2409 }
2410
2411 switch (cm_node->state) {
2412 case I40IW_CM_STATE_ESTABLISHED:
2413 if (res_type == I40IW_MPA_REQUEST_REJECT)
2414 i40iw_pr_err("state for reject\n");
2415 cm_node->state = I40IW_CM_STATE_MPAREQ_RCVD;
2416 type = I40IW_CM_EVENT_MPA_REQ;
2417 i40iw_send_ack(cm_node); /* ACK received MPA request */
2418 atomic_set(&cm_node->passive_state,
2419 I40IW_PASSIVE_STATE_INDICATED);
2420 break;
2421 case I40IW_CM_STATE_MPAREQ_SENT:
2422 i40iw_cleanup_retrans_entry(cm_node);
2423 if (res_type == I40IW_MPA_REQUEST_REJECT) {
2424 type = I40IW_CM_EVENT_MPA_REJECT;
2425 cm_node->state = I40IW_CM_STATE_MPAREJ_RCVD;
2426 } else {
2427 type = I40IW_CM_EVENT_CONNECTED;
2428 cm_node->state = I40IW_CM_STATE_OFFLOADED;
2429 i40iw_send_ack(cm_node);
2430 }
2431 break;
2432 default:
2433 pr_err("%s wrong cm_node state =%d\n", __func__, cm_node->state);
2434 break;
2435 }
2436 i40iw_create_event(cm_node, type);
2437}
2438
2439/**
2440 * i40iw_indicate_pkt_err - Send up err event to cm
2441 * @cm_node: connection's node
2442 */
2443static void i40iw_indicate_pkt_err(struct i40iw_cm_node *cm_node)
2444{
2445 switch (cm_node->state) {
2446 case I40IW_CM_STATE_SYN_SENT:
2447 case I40IW_CM_STATE_MPAREQ_SENT:
2448 i40iw_active_open_err(cm_node, true);
2449 break;
2450 case I40IW_CM_STATE_ESTABLISHED:
2451 case I40IW_CM_STATE_SYN_RCVD:
2452 i40iw_passive_open_err(cm_node, true);
2453 break;
2454 case I40IW_CM_STATE_OFFLOADED:
2455 default:
2456 break;
2457 }
2458}
2459
2460/**
2461 * i40iw_check_syn - Check for error on received syn ack
2462 * @cm_node: connection's node
2463 * @tcph: pointer tcp header
2464 */
2465static int i40iw_check_syn(struct i40iw_cm_node *cm_node, struct tcphdr *tcph)
2466{
2467 int err = 0;
2468
2469 if (ntohl(tcph->ack_seq) != cm_node->tcp_cntxt.loc_seq_num) {
2470 err = 1;
2471 i40iw_active_open_err(cm_node, true);
2472 }
2473 return err;
2474}
2475
2476/**
2477 * i40iw_check_seq - check seq numbers if OK
2478 * @cm_node: connection's node
2479 * @tcph: pointer tcp header
2480 */
2481static int i40iw_check_seq(struct i40iw_cm_node *cm_node, struct tcphdr *tcph)
2482{
2483 int err = 0;
2484 u32 seq;
2485 u32 ack_seq;
2486 u32 loc_seq_num = cm_node->tcp_cntxt.loc_seq_num;
2487 u32 rcv_nxt = cm_node->tcp_cntxt.rcv_nxt;
2488 u32 rcv_wnd;
2489
2490 seq = ntohl(tcph->seq);
2491 ack_seq = ntohl(tcph->ack_seq);
2492 rcv_wnd = cm_node->tcp_cntxt.rcv_wnd;
2493 if (ack_seq != loc_seq_num)
2494 err = -1;
2495 else if (!between(seq, rcv_nxt, (rcv_nxt + rcv_wnd)))
2496 err = -1;
2497 if (err) {
2498 i40iw_pr_err("seq number\n");
2499 i40iw_indicate_pkt_err(cm_node);
2500 }
2501 return err;
2502}
2503
2504/**
2505 * i40iw_handle_syn_pkt - is for Passive node
2506 * @cm_node: connection's node
2507 * @rbuf: receive buffer
2508 */
2509static void i40iw_handle_syn_pkt(struct i40iw_cm_node *cm_node,
2510 struct i40iw_puda_buf *rbuf)
2511{
2512 struct tcphdr *tcph = (struct tcphdr *)rbuf->tcph;
2513 int ret;
2514 u32 inc_sequence;
2515 int optionsize;
2516 struct i40iw_cm_info nfo;
2517
2518 optionsize = (tcph->doff << 2) - sizeof(struct tcphdr);
2519 inc_sequence = ntohl(tcph->seq);
2520
2521 switch (cm_node->state) {
2522 case I40IW_CM_STATE_SYN_SENT:
2523 case I40IW_CM_STATE_MPAREQ_SENT:
2524 /* Rcvd syn on active open connection */
2525 i40iw_active_open_err(cm_node, 1);
2526 break;
2527 case I40IW_CM_STATE_LISTENING:
2528 /* Passive OPEN */
2529 if (atomic_read(&cm_node->listener->pend_accepts_cnt) >
2530 cm_node->listener->backlog) {
2531 cm_node->cm_core->stats_backlog_drops++;
2532 i40iw_passive_open_err(cm_node, false);
2533 break;
2534 }
2535 ret = i40iw_handle_tcp_options(cm_node, tcph, optionsize, 1);
2536 if (ret) {
2537 i40iw_passive_open_err(cm_node, false);
2538 /* drop pkt */
2539 break;
2540 }
2541 cm_node->tcp_cntxt.rcv_nxt = inc_sequence + 1;
2542 cm_node->accept_pend = 1;
2543 atomic_inc(&cm_node->listener->pend_accepts_cnt);
2544
2545 cm_node->state = I40IW_CM_STATE_SYN_RCVD;
2546 i40iw_get_addr_info(cm_node, &nfo);
2547 ret = i40iw_manage_qhash(cm_node->iwdev,
2548 &nfo,
2549 I40IW_QHASH_TYPE_TCP_ESTABLISHED,
2550 I40IW_QHASH_MANAGE_TYPE_ADD,
2551 (void *)cm_node,
2552 false);
2553 cm_node->qhash_set = true;
2554 break;
2555 case I40IW_CM_STATE_CLOSED:
2556 i40iw_cleanup_retrans_entry(cm_node);
2557 atomic_inc(&cm_node->ref_count);
2558 i40iw_send_reset(cm_node);
2559 break;
2560 case I40IW_CM_STATE_OFFLOADED:
2561 case I40IW_CM_STATE_ESTABLISHED:
2562 case I40IW_CM_STATE_FIN_WAIT1:
2563 case I40IW_CM_STATE_FIN_WAIT2:
2564 case I40IW_CM_STATE_MPAREQ_RCVD:
2565 case I40IW_CM_STATE_LAST_ACK:
2566 case I40IW_CM_STATE_CLOSING:
2567 case I40IW_CM_STATE_UNKNOWN:
2568 default:
2569 break;
2570 }
2571}
2572
2573/**
2574 * i40iw_handle_synack_pkt - Process SYN+ACK packet (active side)
2575 * @cm_node: connection's node
2576 * @rbuf: receive buffer
2577 */
2578static void i40iw_handle_synack_pkt(struct i40iw_cm_node *cm_node,
2579 struct i40iw_puda_buf *rbuf)
2580{
2581 struct tcphdr *tcph = (struct tcphdr *)rbuf->tcph;
2582 int ret;
2583 u32 inc_sequence;
2584 int optionsize;
2585
2586 optionsize = (tcph->doff << 2) - sizeof(struct tcphdr);
2587 inc_sequence = ntohl(tcph->seq);
2588 switch (cm_node->state) {
2589 case I40IW_CM_STATE_SYN_SENT:
2590 i40iw_cleanup_retrans_entry(cm_node);
2591 /* active open */
2592 if (i40iw_check_syn(cm_node, tcph)) {
2593 i40iw_pr_err("check syn fail\n");
2594 return;
2595 }
2596 cm_node->tcp_cntxt.rem_ack_num = ntohl(tcph->ack_seq);
2597 /* setup options */
2598 ret = i40iw_handle_tcp_options(cm_node, tcph, optionsize, 0);
2599 if (ret) {
2600 i40iw_debug(cm_node->dev,
2601 I40IW_DEBUG_CM,
2602 "cm_node=%p tcp_options failed\n",
2603 cm_node);
2604 break;
2605 }
2606 i40iw_cleanup_retrans_entry(cm_node);
2607 cm_node->tcp_cntxt.rcv_nxt = inc_sequence + 1;
2608 i40iw_send_ack(cm_node); /* ACK for the syn_ack */
2609 ret = i40iw_send_mpa_request(cm_node);
2610 if (ret) {
2611 i40iw_debug(cm_node->dev,
2612 I40IW_DEBUG_CM,
2613 "cm_node=%p i40iw_send_mpa_request failed\n",
2614 cm_node);
2615 break;
2616 }
2617 cm_node->state = I40IW_CM_STATE_MPAREQ_SENT;
2618 break;
2619 case I40IW_CM_STATE_MPAREQ_RCVD:
2620 i40iw_passive_open_err(cm_node, true);
2621 break;
2622 case I40IW_CM_STATE_LISTENING:
2623 cm_node->tcp_cntxt.loc_seq_num = ntohl(tcph->ack_seq);
2624 i40iw_cleanup_retrans_entry(cm_node);
2625 cm_node->state = I40IW_CM_STATE_CLOSED;
2626 i40iw_send_reset(cm_node);
2627 break;
2628 case I40IW_CM_STATE_CLOSED:
2629 cm_node->tcp_cntxt.loc_seq_num = ntohl(tcph->ack_seq);
2630 i40iw_cleanup_retrans_entry(cm_node);
2631 atomic_inc(&cm_node->ref_count);
2632 i40iw_send_reset(cm_node);
2633 break;
2634 case I40IW_CM_STATE_ESTABLISHED:
2635 case I40IW_CM_STATE_FIN_WAIT1:
2636 case I40IW_CM_STATE_FIN_WAIT2:
2637 case I40IW_CM_STATE_LAST_ACK:
2638 case I40IW_CM_STATE_OFFLOADED:
2639 case I40IW_CM_STATE_CLOSING:
2640 case I40IW_CM_STATE_UNKNOWN:
2641 case I40IW_CM_STATE_MPAREQ_SENT:
2642 default:
2643 break;
2644 }
2645}
2646
2647/**
2648 * i40iw_handle_ack_pkt - process packet with ACK
2649 * @cm_node: connection's node
2650 * @rbuf: receive buffer
2651 */
2652static int i40iw_handle_ack_pkt(struct i40iw_cm_node *cm_node,
2653 struct i40iw_puda_buf *rbuf)
2654{
2655 struct tcphdr *tcph = (struct tcphdr *)rbuf->tcph;
2656 u32 inc_sequence;
2657 int ret = 0;
2658 int optionsize;
2659 u32 datasize = rbuf->datalen;
2660
2661 optionsize = (tcph->doff << 2) - sizeof(struct tcphdr);
2662
2663 if (i40iw_check_seq(cm_node, tcph))
2664 return -EINVAL;
2665
2666 inc_sequence = ntohl(tcph->seq);
2667 switch (cm_node->state) {
2668 case I40IW_CM_STATE_SYN_RCVD:
2669 i40iw_cleanup_retrans_entry(cm_node);
2670 ret = i40iw_handle_tcp_options(cm_node, tcph, optionsize, 1);
2671 if (ret)
2672 break;
2673 cm_node->tcp_cntxt.rem_ack_num = ntohl(tcph->ack_seq);
2674 cm_node->state = I40IW_CM_STATE_ESTABLISHED;
2675 if (datasize) {
2676 cm_node->tcp_cntxt.rcv_nxt = inc_sequence + datasize;
f27b4746
FL		 2677 i40iw_handle_rcv_mpa(cm_node, rbuf);
2678 }
2679 break;
2680 case I40IW_CM_STATE_ESTABLISHED:
2681 i40iw_cleanup_retrans_entry(cm_node);
2682 if (datasize) {
2683 cm_node->tcp_cntxt.rcv_nxt = inc_sequence + datasize;
2684 i40iw_handle_rcv_mpa(cm_node, rbuf);
2685 }
2686 break;
2687 case I40IW_CM_STATE_MPAREQ_SENT:
2688 cm_node->tcp_cntxt.rem_ack_num = ntohl(tcph->ack_seq);
2689 if (datasize) {
2690 cm_node->tcp_cntxt.rcv_nxt = inc_sequence + datasize;
2691 i40iw_handle_rcv_mpa(cm_node, rbuf);
2692 }
2693 break;
2694 case I40IW_CM_STATE_LISTENING:
2695 i40iw_cleanup_retrans_entry(cm_node);
2696 cm_node->state = I40IW_CM_STATE_CLOSED;
2697 i40iw_send_reset(cm_node);
2698 break;
2699 case I40IW_CM_STATE_CLOSED:
2700 i40iw_cleanup_retrans_entry(cm_node);
2701 atomic_inc(&cm_node->ref_count);
2702 i40iw_send_reset(cm_node);
2703 break;
2704 case I40IW_CM_STATE_LAST_ACK:
2705 case I40IW_CM_STATE_CLOSING:
2706 i40iw_cleanup_retrans_entry(cm_node);
2707 cm_node->state = I40IW_CM_STATE_CLOSED;
2708 if (!cm_node->accept_pend)
2709 cm_node->cm_id->rem_ref(cm_node->cm_id);
2710 i40iw_rem_ref_cm_node(cm_node);
2711 break;
2712 case I40IW_CM_STATE_FIN_WAIT1:
2713 i40iw_cleanup_retrans_entry(cm_node);
2714 cm_node->state = I40IW_CM_STATE_FIN_WAIT2;
2715 break;
2716 case I40IW_CM_STATE_SYN_SENT:
2717 case I40IW_CM_STATE_FIN_WAIT2:
2718 case I40IW_CM_STATE_OFFLOADED:
2719 case I40IW_CM_STATE_MPAREQ_RCVD:
2720 case I40IW_CM_STATE_UNKNOWN:
2721 default:
2722 i40iw_cleanup_retrans_entry(cm_node);
2723 break;
2724 }
2725 return ret;
2726}
2727
2728/**
2729 * i40iw_process_packet - process cm packet
2730 * @cm_node: connection's node
2731 * @rbuf: receive buffer
2732 */
2733static void i40iw_process_packet(struct i40iw_cm_node *cm_node,
2734 struct i40iw_puda_buf *rbuf)
2735{
2736 enum i40iw_tcpip_pkt_type pkt_type = I40IW_PKT_TYPE_UNKNOWN;
2737 struct tcphdr *tcph = (struct tcphdr *)rbuf->tcph;
2738 u32 fin_set = 0;
2739 int ret;
2740
2741 if (tcph->rst) {
2742 pkt_type = I40IW_PKT_TYPE_RST;
2743 } else if (tcph->syn) {
2744 pkt_type = I40IW_PKT_TYPE_SYN;
2745 if (tcph->ack)
2746 pkt_type = I40IW_PKT_TYPE_SYNACK;
2747 } else if (tcph->ack) {
2748 pkt_type = I40IW_PKT_TYPE_ACK;
2749 }
2750 if (tcph->fin)
2751 fin_set = 1;
2752
2753 switch (pkt_type) {
2754 case I40IW_PKT_TYPE_SYN:
2755 i40iw_handle_syn_pkt(cm_node, rbuf);
2756 break;
2757 case I40IW_PKT_TYPE_SYNACK:
2758 i40iw_handle_synack_pkt(cm_node, rbuf);
2759 break;
2760 case I40IW_PKT_TYPE_ACK:
2761 ret = i40iw_handle_ack_pkt(cm_node, rbuf);
2762 if (fin_set && !ret)
2763 i40iw_handle_fin_pkt(cm_node);
2764 break;
2765 case I40IW_PKT_TYPE_RST:
2766 i40iw_handle_rst_pkt(cm_node, rbuf);
2767 break;
2768 default:
2769 if (fin_set &&
2770 (!i40iw_check_seq(cm_node, (struct tcphdr *)rbuf->tcph)))
2771 i40iw_handle_fin_pkt(cm_node);
2772 break;
2773 }
2774}
2775
2776/**
2777 * i40iw_make_listen_node - create a listen node with params
2778 * @cm_core: cm's core
2779 * @iwdev: iwarp device structure
2780 * @cm_info: quad info for connection
2781 */
2782static struct i40iw_cm_listener *i40iw_make_listen_node(
2783 struct i40iw_cm_core *cm_core,
2784 struct i40iw_device *iwdev,
2785 struct i40iw_cm_info *cm_info)
2786{
2787 struct i40iw_cm_listener *listener;
f27b4746
FL		 2788 unsigned long flags;
2789
2790 /* cannot have multiple matching listeners */
2791 listener = i40iw_find_listener(cm_core, cm_info->loc_addr,
2792 cm_info->loc_port,
2793 cm_info->vlan_id,
8d8cd0bf 2794 I40IW_CM_LISTENER_EITHER_STATE);
f27b4746
FL		 2795 if (listener &&
2796 (listener->listener_state == I40IW_CM_LISTENER_ACTIVE_STATE)) {
2797 atomic_dec(&listener->ref_count);
2798 i40iw_debug(cm_core->dev,
2799 I40IW_DEBUG_CM,
2800 "Not creating listener since it already exists\n");
2801 return NULL;
2802 }
2803
2804 if (!listener) {
f27b4746
FL		 2805 /* create a CM listen node (1/2 node to compare incoming traffic to) */
2806 listener = kzalloc(sizeof(*listener), GFP_ATOMIC);
2807 if (!listener)
2808 return NULL;
2809 cm_core->stats_listen_nodes_created++;
2810 memcpy(listener->loc_addr, cm_info->loc_addr, sizeof(listener->loc_addr));
f27b4746 2811 listener->loc_port = cm_info->loc_port;
f27b4746
FL		 2812
2813 INIT_LIST_HEAD(&listener->child_listen_list);
2814
2815 atomic_set(&listener->ref_count, 1);
2816 } else {
2817 listener->reused_node = 1;
2818 }
2819
2820 listener->cm_id = cm_info->cm_id;
2821 listener->ipv4 = cm_info->ipv4;
2822 listener->vlan_id = cm_info->vlan_id;
2823 atomic_set(&listener->pend_accepts_cnt, 0);
2824 listener->cm_core = cm_core;
2825 listener->iwdev = iwdev;
2826
2827 listener->backlog = cm_info->backlog;
2828 listener->listener_state = I40IW_CM_LISTENER_ACTIVE_STATE;
2829
2830 if (!listener->reused_node) {
2831 spin_lock_irqsave(&cm_core->listen_list_lock, flags);
2832 list_add(&listener->list, &cm_core->listen_nodes);
2833 spin_unlock_irqrestore(&cm_core->listen_list_lock, flags);
2834 }
2835
2836 return listener;
2837}
2838
2839/**
2840 * i40iw_create_cm_node - make a connection node with params
2841 * @cm_core: cm's core
2842 * @iwdev: iwarp device structure
2843 * @private_data_len: len to provate data for mpa request
2844 * @private_data: pointer to private data for connection
2845 * @cm_info: quad info for connection
2846 */
2847static struct i40iw_cm_node *i40iw_create_cm_node(
2848 struct i40iw_cm_core *cm_core,
2849 struct i40iw_device *iwdev,
2850 u16 private_data_len,
2851 void *private_data,
2852 struct i40iw_cm_info *cm_info)
2853{
f27b4746
FL		 2854 struct i40iw_cm_node *cm_node;
2855 struct i40iw_cm_listener *loopback_remotelistener;
2856 struct i40iw_cm_node *loopback_remotenode;
2857 struct i40iw_cm_info loopback_cm_info;
2858
2859 /* create a CM connection node */
2860 cm_node = i40iw_make_cm_node(cm_core, iwdev, cm_info, NULL);
2861 if (!cm_node)
2862 return NULL;
2863 /* set our node side to client (active) side */
2864 cm_node->tcp_cntxt.client = 1;
2865 cm_node->tcp_cntxt.rcv_wscale = I40IW_CM_DEFAULT_RCV_WND_SCALE;
2866
2867 if (!memcmp(cm_info->loc_addr, cm_info->rem_addr, sizeof(cm_info->loc_addr))) {
2868 loopback_remotelistener = i40iw_find_listener(
2869 cm_core,
8d8cd0bf
FL		 2870 cm_info->rem_addr,
2871 cm_node->rem_port,
f27b4746 2872 cm_node->vlan_id,
8d8cd0bf 2873 I40IW_CM_LISTENER_ACTIVE_STATE);
f27b4746
FL		 2874 if (!loopback_remotelistener) {
2875 i40iw_create_event(cm_node, I40IW_CM_EVENT_ABORTED);
2876 } else {
2877 loopback_cm_info = *cm_info;
2878 loopback_cm_info.loc_port = cm_info->rem_port;
2879 loopback_cm_info.rem_port = cm_info->loc_port;
f27b4746
FL		 2880 loopback_cm_info.cm_id = loopback_remotelistener->cm_id;
2881 loopback_cm_info.ipv4 = cm_info->ipv4;
2882 loopback_remotenode = i40iw_make_cm_node(cm_core,
2883 iwdev,
2884 &loopback_cm_info,
2885 loopback_remotelistener);
2886 if (!loopback_remotenode) {
2887 i40iw_rem_ref_cm_node(cm_node);
2888 return NULL;
2889 }
2890 cm_core->stats_loopbacks++;
2891 loopback_remotenode->loopbackpartner = cm_node;
2892 loopback_remotenode->tcp_cntxt.rcv_wscale =
2893 I40IW_CM_DEFAULT_RCV_WND_SCALE;
2894 cm_node->loopbackpartner = loopback_remotenode;
2895 memcpy(loopback_remotenode->pdata_buf, private_data,
2896 private_data_len);
2897 loopback_remotenode->pdata.size = private_data_len;
2898
2899 cm_node->state = I40IW_CM_STATE_OFFLOADED;
2900 cm_node->tcp_cntxt.rcv_nxt =
2901 loopback_remotenode->tcp_cntxt.loc_seq_num;
2902 loopback_remotenode->tcp_cntxt.rcv_nxt =
2903 cm_node->tcp_cntxt.loc_seq_num;
2904 cm_node->tcp_cntxt.max_snd_wnd =
2905 loopback_remotenode->tcp_cntxt.rcv_wnd;
2906 loopback_remotenode->tcp_cntxt.max_snd_wnd = cm_node->tcp_cntxt.rcv_wnd;
2907 cm_node->tcp_cntxt.snd_wnd = loopback_remotenode->tcp_cntxt.rcv_wnd;
2908 loopback_remotenode->tcp_cntxt.snd_wnd = cm_node->tcp_cntxt.rcv_wnd;
2909 cm_node->tcp_cntxt.snd_wscale = loopback_remotenode->tcp_cntxt.rcv_wscale;
2910 loopback_remotenode->tcp_cntxt.snd_wscale = cm_node->tcp_cntxt.rcv_wscale;
2911 loopback_remotenode->state = I40IW_CM_STATE_MPAREQ_RCVD;
2912 i40iw_create_event(loopback_remotenode, I40IW_CM_EVENT_MPA_REQ);
2913 }
2914 return cm_node;
2915 }
2916
2917 cm_node->pdata.size = private_data_len;
2918 cm_node->pdata.addr = cm_node->pdata_buf;
2919
2920 memcpy(cm_node->pdata_buf, private_data, private_data_len);
2921
2922 cm_node->state = I40IW_CM_STATE_SYN_SENT;
f27b4746
FL		 2923 return cm_node;
2924}
2925
2926/**
2927 * i40iw_cm_reject - reject and teardown a connection
2928 * @cm_node: connection's node
2929 * @pdate: ptr to private data for reject
2930 * @plen: size of private data
2931 */
2932static int i40iw_cm_reject(struct i40iw_cm_node *cm_node, const void *pdata, u8 plen)
2933{
2934 int ret = 0;
2935 int err;
2936 int passive_state;
2937 struct iw_cm_id *cm_id = cm_node->cm_id;
2938 struct i40iw_cm_node *loopback = cm_node->loopbackpartner;
2939
2940 if (cm_node->tcp_cntxt.client)
2941 return ret;
2942 i40iw_cleanup_retrans_entry(cm_node);
2943
2944 if (!loopback) {
2945 passive_state = atomic_add_return(1, &cm_node->passive_state);
2946 if (passive_state == I40IW_SEND_RESET_EVENT) {
2947 cm_node->state = I40IW_CM_STATE_CLOSED;
2948 i40iw_rem_ref_cm_node(cm_node);
2949 } else {
2950 if (cm_node->state == I40IW_CM_STATE_LISTENER_DESTROYED) {
2951 i40iw_rem_ref_cm_node(cm_node);
2952 } else {
2953 ret = i40iw_send_mpa_reject(cm_node, pdata, plen);
2954 if (ret) {
2955 cm_node->state = I40IW_CM_STATE_CLOSED;
2956 err = i40iw_send_reset(cm_node);
2957 if (err)
2958 i40iw_pr_err("send reset failed\n");
2959 } else {
2960 cm_id->add_ref(cm_id);
2961 }
2962 }
2963 }
2964 } else {
2965 cm_node->cm_id = NULL;
2966 if (cm_node->state == I40IW_CM_STATE_LISTENER_DESTROYED) {
2967 i40iw_rem_ref_cm_node(cm_node);
2968 i40iw_rem_ref_cm_node(loopback);
2969 } else {
2970 ret = i40iw_send_cm_event(loopback,
2971 loopback->cm_id,
2972 IW_CM_EVENT_CONNECT_REPLY,
2973 -ECONNREFUSED);
2974 i40iw_rem_ref_cm_node(cm_node);
2975 loopback->state = I40IW_CM_STATE_CLOSING;
2976
2977 cm_id = loopback->cm_id;
2978 i40iw_rem_ref_cm_node(loopback);
2979 cm_id->rem_ref(cm_id);
2980 }
2981 }
2982
2983 return ret;
2984}
2985
2986/**
2987 * i40iw_cm_close - close of cm connection
2988 * @cm_node: connection's node
2989 */
2990static int i40iw_cm_close(struct i40iw_cm_node *cm_node)
2991{
2992 int ret = 0;
2993
2994 if (!cm_node)
2995 return -EINVAL;
2996
2997 switch (cm_node->state) {
2998 case I40IW_CM_STATE_SYN_RCVD:
2999 case I40IW_CM_STATE_SYN_SENT:
3000 case I40IW_CM_STATE_ONE_SIDE_ESTABLISHED:
3001 case I40IW_CM_STATE_ESTABLISHED:
3002 case I40IW_CM_STATE_ACCEPTING:
3003 case I40IW_CM_STATE_MPAREQ_SENT:
3004 case I40IW_CM_STATE_MPAREQ_RCVD:
3005 i40iw_cleanup_retrans_entry(cm_node);
3006 i40iw_send_reset(cm_node);
3007 break;
3008 case I40IW_CM_STATE_CLOSE_WAIT:
3009 cm_node->state = I40IW_CM_STATE_LAST_ACK;
3010 i40iw_send_fin(cm_node);
3011 break;
3012 case I40IW_CM_STATE_FIN_WAIT1:
3013 case I40IW_CM_STATE_FIN_WAIT2:
3014 case I40IW_CM_STATE_LAST_ACK:
3015 case I40IW_CM_STATE_TIME_WAIT:
3016 case I40IW_CM_STATE_CLOSING:
3017 ret = -1;
3018 break;
3019 case I40IW_CM_STATE_LISTENING:
3020 i40iw_cleanup_retrans_entry(cm_node);
3021 i40iw_send_reset(cm_node);
3022 break;
3023 case I40IW_CM_STATE_MPAREJ_RCVD:
3024 case I40IW_CM_STATE_UNKNOWN:
3025 case I40IW_CM_STATE_INITED:
3026 case I40IW_CM_STATE_CLOSED:
3027 case I40IW_CM_STATE_LISTENER_DESTROYED:
3028 i40iw_rem_ref_cm_node(cm_node);
3029 break;
3030 case I40IW_CM_STATE_OFFLOADED:
3031 if (cm_node->send_entry)
3032 i40iw_pr_err("send_entry\n");
3033 i40iw_rem_ref_cm_node(cm_node);
3034 break;
3035 }
3036 return ret;
3037}
3038
3039/**
3040 * i40iw_receive_ilq - recv an ETHERNET packet, and process it
3041 * through CM
3042 * @dev: FPK dev struct
3043 * @rbuf: receive buffer
3044 */
3045void i40iw_receive_ilq(struct i40iw_sc_dev *dev, struct i40iw_puda_buf *rbuf)
3046{
3047 struct i40iw_cm_node *cm_node;
3048 struct i40iw_cm_listener *listener;
3049 struct iphdr *iph;
3050 struct ipv6hdr *ip6h;
3051 struct tcphdr *tcph;
3052 struct i40iw_cm_info cm_info;
3053 struct i40iw_device *iwdev = (struct i40iw_device *)dev->back_dev;
3054 struct i40iw_cm_core *cm_core = &iwdev->cm_core;
3055 struct vlan_ethhdr *ethh;
0fc2dc58 3056 u16 vtag;
f27b4746
FL		 3057
3058 /* if vlan, then maclen = 18 else 14 */
3059 iph = (struct iphdr *)rbuf->iph;
3060 memset(&cm_info, 0, sizeof(cm_info));
3061
3062 i40iw_debug_buf(dev,
3063 I40IW_DEBUG_ILQ,
3064 "RECEIVE ILQ BUFFER",
3065 rbuf->mem.va,
3066 rbuf->totallen);
3067 ethh = (struct vlan_ethhdr *)rbuf->mem.va;
3068
3069 if (ethh->h_vlan_proto == htons(ETH_P_8021Q)) {
0fc2dc58
HO		 3070 vtag = ntohs(ethh->h_vlan_TCI);
3071 cm_info.user_pri = (vtag & VLAN_PRIO_MASK) >> VLAN_PRIO_SHIFT;
3072 cm_info.vlan_id = vtag & VLAN_VID_MASK;
f27b4746
FL		 3073 i40iw_debug(cm_core->dev,
3074 I40IW_DEBUG_CM,
3075 "%s vlan_id=%d\n",
3076 __func__,
3077 cm_info.vlan_id);
3078 } else {
3079 cm_info.vlan_id = I40IW_NO_VLAN;
3080 }
3081 tcph = (struct tcphdr *)rbuf->tcph;
3082
3083 if (rbuf->ipv4) {
3084 cm_info.loc_addr[0] = ntohl(iph->daddr);
3085 cm_info.rem_addr[0] = ntohl(iph->saddr);
3086 cm_info.ipv4 = true;
3087 } else {
3088 ip6h = (struct ipv6hdr *)rbuf->iph;
3089 i40iw_copy_ip_ntohl(cm_info.loc_addr,
3090 ip6h->daddr.in6_u.u6_addr32);
3091 i40iw_copy_ip_ntohl(cm_info.rem_addr,
3092 ip6h->saddr.in6_u.u6_addr32);
3093 cm_info.ipv4 = false;
3094 }
3095 cm_info.loc_port = ntohs(tcph->dest);
3096 cm_info.rem_port = ntohs(tcph->source);
f27b4746 3097 cm_node = i40iw_find_node(cm_core,
8d8cd0bf
FL		 3098 cm_info.rem_port,
3099 cm_info.rem_addr,
3100 cm_info.loc_port,
3101 cm_info.loc_addr,
f27b4746
FL		 3102 true);
3103
3104 if (!cm_node) {
3105 /* Only type of packet accepted are for */
3106 /* the PASSIVE open (syn only) */
3107 if (!tcph->syn || tcph->ack)
3108 return;
3109 listener =
3110 i40iw_find_listener(cm_core,
8d8cd0bf
FL		 3111 cm_info.loc_addr,
3112 cm_info.loc_port,
f27b4746 3113 cm_info.vlan_id,
8d8cd0bf 3114 I40IW_CM_LISTENER_ACTIVE_STATE);
f27b4746
FL		 3115 if (!listener) {
3116 cm_info.cm_id = NULL;
3117 i40iw_debug(cm_core->dev,
3118 I40IW_DEBUG_CM,
3119 "%s no listener found\n",
3120 __func__);
3121 return;
3122 }
3123 cm_info.cm_id = listener->cm_id;
3124 cm_node = i40iw_make_cm_node(cm_core, iwdev, &cm_info, listener);
3125 if (!cm_node) {
3126 i40iw_debug(cm_core->dev,
3127 I40IW_DEBUG_CM,
3128 "%s allocate node failed\n",
3129 __func__);
3130 atomic_dec(&listener->ref_count);
3131 return;
3132 }
3133 if (!tcph->rst && !tcph->fin) {
3134 cm_node->state = I40IW_CM_STATE_LISTENING;
3135 } else {
3136 i40iw_rem_ref_cm_node(cm_node);
3137 return;
3138 }
3139 atomic_inc(&cm_node->ref_count);
3140 } else if (cm_node->state == I40IW_CM_STATE_OFFLOADED) {
3141 i40iw_rem_ref_cm_node(cm_node);
3142 return;
3143 }
3144 i40iw_process_packet(cm_node, rbuf);
3145 i40iw_rem_ref_cm_node(cm_node);
3146}
3147
3148/**
3149 * i40iw_setup_cm_core - allocate a top level instance of a cm
3150 * core
3151 * @iwdev: iwarp device structure
3152 */
3153void i40iw_setup_cm_core(struct i40iw_device *iwdev)
3154{
3155 struct i40iw_cm_core *cm_core = &iwdev->cm_core;
3156
3157 cm_core->iwdev = iwdev;
3158 cm_core->dev = &iwdev->sc_dev;
3159
3160 INIT_LIST_HEAD(&cm_core->connected_nodes);
3161 INIT_LIST_HEAD(&cm_core->listen_nodes);
3162
3163 init_timer(&cm_core->tcp_timer);
3164 cm_core->tcp_timer.function = i40iw_cm_timer_tick;
3165 cm_core->tcp_timer.data = (unsigned long)cm_core;
3166
3167 spin_lock_init(&cm_core->ht_lock);
3168 spin_lock_init(&cm_core->listen_list_lock);
3169
5e9ff9b0
BS		 3170 cm_core->event_wq = alloc_ordered_workqueue("iwewq",
3171 WQ_MEM_RECLAIM);
3172
3173 cm_core->disconn_wq = alloc_ordered_workqueue("iwdwq",
3174 WQ_MEM_RECLAIM);
f27b4746
FL		 3175}
3176
3177/**
3178 * i40iw_cleanup_cm_core - deallocate a top level instance of a
3179 * cm core
3180 * @cm_core: cm's core
3181 */
3182void i40iw_cleanup_cm_core(struct i40iw_cm_core *cm_core)
3183{
3184 unsigned long flags;
3185
3186 if (!cm_core)
3187 return;
3188
3189 spin_lock_irqsave(&cm_core->ht_lock, flags);
3190 if (timer_pending(&cm_core->tcp_timer))
3191 del_timer_sync(&cm_core->tcp_timer);
3192 spin_unlock_irqrestore(&cm_core->ht_lock, flags);
3193
3194 destroy_workqueue(cm_core->event_wq);
3195 destroy_workqueue(cm_core->disconn_wq);
3196}
3197
3198/**
3199 * i40iw_init_tcp_ctx - setup qp context
3200 * @cm_node: connection's node
3201 * @tcp_info: offload info for tcp
3202 * @iwqp: associate qp for the connection
3203 */
3204static void i40iw_init_tcp_ctx(struct i40iw_cm_node *cm_node,
3205 struct i40iw_tcp_offload_info *tcp_info,
3206 struct i40iw_qp *iwqp)
3207{
3208 tcp_info->ipv4 = cm_node->ipv4;
3209 tcp_info->drop_ooo_seg = true;
3210 tcp_info->wscale = true;
3211 tcp_info->ignore_tcp_opt = true;
3212 tcp_info->ignore_tcp_uns_opt = true;
3213 tcp_info->no_nagle = false;
3214
3215 tcp_info->ttl = I40IW_DEFAULT_TTL;
3216 tcp_info->rtt_var = cpu_to_le32(I40IW_DEFAULT_RTT_VAR);
3217 tcp_info->ss_thresh = cpu_to_le32(I40IW_DEFAULT_SS_THRESH);
3218 tcp_info->rexmit_thresh = I40IW_DEFAULT_REXMIT_THRESH;
3219
3220 tcp_info->tcp_state = I40IW_TCP_STATE_ESTABLISHED;
3221 tcp_info->snd_wscale = cm_node->tcp_cntxt.snd_wscale;
3222 tcp_info->rcv_wscale = cm_node->tcp_cntxt.rcv_wscale;
3223
3224 tcp_info->snd_nxt = cpu_to_le32(cm_node->tcp_cntxt.loc_seq_num);
3225 tcp_info->snd_wnd = cpu_to_le32(cm_node->tcp_cntxt.snd_wnd);
3226 tcp_info->rcv_nxt = cpu_to_le32(cm_node->tcp_cntxt.rcv_nxt);
3227 tcp_info->snd_max = cpu_to_le32(cm_node->tcp_cntxt.loc_seq_num);
3228
3229 tcp_info->snd_una = cpu_to_le32(cm_node->tcp_cntxt.loc_seq_num);
3230 tcp_info->cwnd = cpu_to_le32(2 * cm_node->tcp_cntxt.mss);
3231 tcp_info->snd_wl1 = cpu_to_le32(cm_node->tcp_cntxt.rcv_nxt);
3232 tcp_info->snd_wl2 = cpu_to_le32(cm_node->tcp_cntxt.loc_seq_num);
3233 tcp_info->max_snd_window = cpu_to_le32(cm_node->tcp_cntxt.max_snd_wnd);
3234 tcp_info->rcv_wnd = cpu_to_le32(cm_node->tcp_cntxt.rcv_wnd <<
3235 cm_node->tcp_cntxt.rcv_wscale);
3236
3237 tcp_info->flow_label = 0;
3238 tcp_info->snd_mss = cpu_to_le32(((u32)cm_node->tcp_cntxt.mss));
3239 if (cm_node->vlan_id < VLAN_TAG_PRESENT) {
3240 tcp_info->insert_vlan_tag = true;
3241 tcp_info->vlan_tag = cpu_to_le16(cm_node->vlan_id);
3242 }
3243 if (cm_node->ipv4) {
8d8cd0bf
FL		 3244 tcp_info->src_port = cpu_to_le16(cm_node->loc_port);
3245 tcp_info->dst_port = cpu_to_le16(cm_node->rem_port);
f27b4746 3246
8d8cd0bf
FL		 3247 tcp_info->dest_ip_addr3 = cpu_to_le32(cm_node->rem_addr[0]);
3248 tcp_info->local_ipaddr3 = cpu_to_le32(cm_node->loc_addr[0]);
20c61f7e
IM		 3249 tcp_info->arp_idx =
3250 cpu_to_le16((u16)i40iw_arp_table(
3251 iwqp->iwdev,
3252 &tcp_info->dest_ip_addr3,
3253 true,
3254 NULL,
3255 I40IW_ARP_RESOLVE));
f27b4746 3256 } else {
8d8cd0bf
FL		 3257 tcp_info->src_port = cpu_to_le16(cm_node->loc_port);
3258 tcp_info->dst_port = cpu_to_le16(cm_node->rem_port);
3259 tcp_info->dest_ip_addr0 = cpu_to_le32(cm_node->rem_addr[0]);
3260 tcp_info->dest_ip_addr1 = cpu_to_le32(cm_node->rem_addr[1]);
3261 tcp_info->dest_ip_addr2 = cpu_to_le32(cm_node->rem_addr[2]);
3262 tcp_info->dest_ip_addr3 = cpu_to_le32(cm_node->rem_addr[3]);
3263 tcp_info->local_ipaddr0 = cpu_to_le32(cm_node->loc_addr[0]);
3264 tcp_info->local_ipaddr1 = cpu_to_le32(cm_node->loc_addr[1]);
3265 tcp_info->local_ipaddr2 = cpu_to_le32(cm_node->loc_addr[2]);
3266 tcp_info->local_ipaddr3 = cpu_to_le32(cm_node->loc_addr[3]);
20c61f7e
IM		 3267 tcp_info->arp_idx =
3268 cpu_to_le16((u16)i40iw_arp_table(
3269 iwqp->iwdev,
3270 &tcp_info->dest_ip_addr0,
3271 false,
3272 NULL,
3273 I40IW_ARP_RESOLVE));
f27b4746
FL		 3274 }
3275}
3276
3277/**
3278 * i40iw_cm_init_tsa_conn - setup qp for RTS
3279 * @iwqp: associate qp for the connection
3280 * @cm_node: connection's node
3281 */
3282static void i40iw_cm_init_tsa_conn(struct i40iw_qp *iwqp,
3283 struct i40iw_cm_node *cm_node)
3284{
3285 struct i40iw_tcp_offload_info tcp_info;
3286 struct i40iwarp_offload_info *iwarp_info;
3287 struct i40iw_qp_host_ctx_info *ctx_info;
3288 struct i40iw_device *iwdev = iwqp->iwdev;
3289 struct i40iw_sc_dev *dev = &iwqp->iwdev->sc_dev;
3290
3291 memset(&tcp_info, 0x00, sizeof(struct i40iw_tcp_offload_info));
3292 iwarp_info = &iwqp->iwarp_info;
3293 ctx_info = &iwqp->ctx_info;
3294
3295 ctx_info->tcp_info = &tcp_info;
3296 ctx_info->send_cq_num = iwqp->iwscq->sc_cq.cq_uk.cq_id;
3297 ctx_info->rcv_cq_num = iwqp->iwrcq->sc_cq.cq_uk.cq_id;
3298
3299 iwarp_info->ord_size = cm_node->ord_size;
3300 iwarp_info->ird_size = i40iw_derive_hw_ird_setting(cm_node->ird_size);
3301
3302 if (iwarp_info->ord_size == 1)
3303 iwarp_info->ord_size = 2;
3304
3305 iwarp_info->rd_enable = true;
3306 iwarp_info->rdmap_ver = 1;
3307 iwarp_info->ddp_ver = 1;
3308
3309 iwarp_info->pd_id = iwqp->iwpd->sc_pd.pd_id;
3310
3311 ctx_info->tcp_info_valid = true;
3312 ctx_info->iwarp_info_valid = true;
0fc2dc58
HO		 3313 ctx_info->add_to_qoslist = true;
3314 ctx_info->user_pri = cm_node->user_pri;
f27b4746
FL		 3315
3316 i40iw_init_tcp_ctx(cm_node, &tcp_info, iwqp);
3317 if (cm_node->snd_mark_en) {
3318 iwarp_info->snd_mark_en = true;
3319 iwarp_info->snd_mark_offset = (tcp_info.snd_nxt &
3320 SNDMARKER_SEQNMASK) + cm_node->lsmm_size;
3321 }
3322
3323 cm_node->state = I40IW_CM_STATE_OFFLOADED;
3324 tcp_info.tcp_state = I40IW_TCP_STATE_ESTABLISHED;
3325 tcp_info.src_mac_addr_idx = iwdev->mac_ip_table_idx;
3326
3327 dev->iw_priv_qp_ops->qp_setctx(&iwqp->sc_qp, (u64 *)(iwqp->host_ctx.va), ctx_info);
3328
3329 /* once tcp_info is set, no need to do it again */
3330 ctx_info->tcp_info_valid = false;
3331 ctx_info->iwarp_info_valid = false;
0fc2dc58 3332 ctx_info->add_to_qoslist = false;
f27b4746
FL		 3333}
3334
3335/**
3336 * i40iw_cm_disconn - when a connection is being closed
3337 * @iwqp: associate qp for the connection
3338 */
3339int i40iw_cm_disconn(struct i40iw_qp *iwqp)
3340{
3341 struct disconn_work *work;
3342 struct i40iw_device *iwdev = iwqp->iwdev;
3343 struct i40iw_cm_core *cm_core = &iwdev->cm_core;
3344
3345 work = kzalloc(sizeof(*work), GFP_ATOMIC);
3346 if (!work)
3347 return -ENOMEM; /* Timer will clean up */
3348
3349 i40iw_add_ref(&iwqp->ibqp);
3350 work->iwqp = iwqp;
3351 INIT_WORK(&work->work, i40iw_disconnect_worker);
3352 queue_work(cm_core->disconn_wq, &work->work);
3353 return 0;
3354}
3355
f27b4746
FL		 3356/**
3357 * i40iw_qp_disconnect - free qp and close cm
3358 * @iwqp: associate qp for the connection
3359 */
3360static void i40iw_qp_disconnect(struct i40iw_qp *iwqp)
3361{
3362 struct i40iw_device *iwdev;
3363 struct i40iw_ib_device *iwibdev;
3364
3365 iwdev = to_iwdev(iwqp->ibqp.device);
3366 if (!iwdev) {
3367 i40iw_pr_err("iwdev == NULL\n");
3368 return;
3369 }
3370
3371 iwibdev = iwdev->iwibdev;
3372
3373 if (iwqp->active_conn) {
3374 /* indicate this connection is NOT active */
3375 iwqp->active_conn = 0;
3376 } else {
3377 /* Need to free the Last Streaming Mode Message */
3378 if (iwqp->ietf_mem.va) {
3379 if (iwqp->lsmm_mr)
3380 iwibdev->ibdev.dereg_mr(iwqp->lsmm_mr);
3381 i40iw_free_dma_mem(iwdev->sc_dev.hw, &iwqp->ietf_mem);
3382 }
3383 }
3384
3385 /* close the CM node down if it is still active */
3386 if (iwqp->cm_node) {
3387 i40iw_debug(&iwdev->sc_dev, I40IW_DEBUG_CM, "%s Call close API\n", __func__);
3388 i40iw_cm_close(iwqp->cm_node);
3389 }
3390}
3391
3392/**
3393 * i40iw_cm_disconn_true - called by worker thread to disconnect qp
3394 * @iwqp: associate qp for the connection
3395 */
3396static void i40iw_cm_disconn_true(struct i40iw_qp *iwqp)
3397{
3398 struct iw_cm_id *cm_id;
3399 struct i40iw_device *iwdev;
3400 struct i40iw_sc_qp *qp = &iwqp->sc_qp;
3401 u16 last_ae;
3402 u8 original_hw_tcp_state;
3403 u8 original_ibqp_state;
3404 int disconn_status = 0;
3405 int issue_disconn = 0;
3406 int issue_close = 0;
3407 int issue_flush = 0;
3408 struct ib_event ibevent;
3409 unsigned long flags;
3410 int ret;
3411
3412 if (!iwqp) {
3413 i40iw_pr_err("iwqp == NULL\n");
3414 return;
3415 }
3416
3417 spin_lock_irqsave(&iwqp->lock, flags);
3418 cm_id = iwqp->cm_id;
3419 /* make sure we havent already closed this connection */
3420 if (!cm_id) {
3421 spin_unlock_irqrestore(&iwqp->lock, flags);
3422 return;
3423 }
3424
3425 iwdev = to_iwdev(iwqp->ibqp.device);
3426
3427 original_hw_tcp_state = iwqp->hw_tcp_state;
3428 original_ibqp_state = iwqp->ibqp_state;
3429 last_ae = iwqp->last_aeq;
3430
3431 if (qp->term_flags) {
3432 issue_disconn = 1;
3433 issue_close = 1;
3434 iwqp->cm_id = NULL;
3435 /*When term timer expires after cm_timer, don't want
3436 *terminate-handler to issue cm_disconn which can re-free
3437 *a QP even after its refcnt=0.
3438 */
3439 del_timer(&iwqp->terminate_timer);
3440 if (!iwqp->flush_issued) {
3441 iwqp->flush_issued = 1;
3442 issue_flush = 1;
3443 }
3444 } else if ((original_hw_tcp_state == I40IW_TCP_STATE_CLOSE_WAIT) ||
3445 ((original_ibqp_state == IB_QPS_RTS) &&
3446 (last_ae == I40IW_AE_LLP_CONNECTION_RESET))) {
3447 issue_disconn = 1;
3448 if (last_ae == I40IW_AE_LLP_CONNECTION_RESET)
3449 disconn_status = -ECONNRESET;
3450 }
3451
3452 if (((original_hw_tcp_state == I40IW_TCP_STATE_CLOSED) ||
3453 (original_hw_tcp_state == I40IW_TCP_STATE_TIME_WAIT) ||
3454 (last_ae == I40IW_AE_RDMAP_ROE_BAD_LLP_CLOSE) ||
3455 (last_ae == I40IW_AE_LLP_CONNECTION_RESET))) {
3456 issue_close = 1;
3457 iwqp->cm_id = NULL;
3458 if (!iwqp->flush_issued) {
3459 iwqp->flush_issued = 1;
3460 issue_flush = 1;
3461 }
3462 }
3463
3464 spin_unlock_irqrestore(&iwqp->lock, flags);
3465 if (issue_flush && !iwqp->destroyed) {
3466 /* Flush the queues */
3467 i40iw_flush_wqes(iwdev, iwqp);
3468
3469 if (qp->term_flags) {
3470 ibevent.device = iwqp->ibqp.device;
3471 ibevent.event = (qp->eventtype == TERM_EVENT_QP_FATAL) ?
3472 IB_EVENT_QP_FATAL : IB_EVENT_QP_ACCESS_ERR;
3473 ibevent.element.qp = &iwqp->ibqp;
3474 iwqp->ibqp.event_handler(&ibevent, iwqp->ibqp.qp_context);
3475 }
3476 }
3477
3478 if (cm_id && cm_id->event_handler) {
3479 if (issue_disconn) {
3480 ret = i40iw_send_cm_event(NULL,
3481 cm_id,
3482 IW_CM_EVENT_DISCONNECT,
3483 disconn_status);
3484
3485 if (ret)
3486 i40iw_debug(&iwdev->sc_dev,
3487 I40IW_DEBUG_CM,
3488 "disconnect event failed %s: - cm_id = %p\n",
3489 __func__, cm_id);
3490 }
3491 if (issue_close) {
3492 i40iw_qp_disconnect(iwqp);
3493 cm_id->provider_data = iwqp;
3494 ret = i40iw_send_cm_event(NULL, cm_id, IW_CM_EVENT_CLOSE, 0);
3495 if (ret)
3496 i40iw_debug(&iwdev->sc_dev,
3497 I40IW_DEBUG_CM,
3498 "close event failed %s: - cm_id = %p\n",
3499 __func__, cm_id);
3500 cm_id->rem_ref(cm_id);
3501 }
3502 }
3503}
3504
3505/**
3506 * i40iw_disconnect_worker - worker for connection close
3507 * @work: points or disconn structure
3508 */
3509static void i40iw_disconnect_worker(struct work_struct *work)
3510{
3511 struct disconn_work *dwork = container_of(work, struct disconn_work, work);
3512 struct i40iw_qp *iwqp = dwork->iwqp;
3513
3514 kfree(dwork);
3515 i40iw_cm_disconn_true(iwqp);
3516 i40iw_rem_ref(&iwqp->ibqp);
3517}
3518
3519/**
3520 * i40iw_accept - registered call for connection to be accepted
3521 * @cm_id: cm information for passive connection
3522 * @conn_param: accpet parameters
3523 */
3524int i40iw_accept(struct iw_cm_id *cm_id, struct iw_cm_conn_param *conn_param)
3525{
3526 struct ib_qp *ibqp;
3527 struct i40iw_qp *iwqp;
3528 struct i40iw_device *iwdev;
3529 struct i40iw_sc_dev *dev;
3530 struct i40iw_cm_node *cm_node;
3531 struct ib_qp_attr attr;
3532 int passive_state;
f27b4746
FL		 3533 struct ib_mr *ibmr;
3534 struct i40iw_pd *iwpd;
3535 u16 buf_len = 0;
3536 struct i40iw_kmem_info accept;
3537 enum i40iw_status_code status;
3538 u64 tagged_offset;
3539
3540 memset(&attr, 0, sizeof(attr));
3541 ibqp = i40iw_get_qp(cm_id->device, conn_param->qpn);
3542 if (!ibqp)
3543 return -EINVAL;
3544
3545 iwqp = to_iwqp(ibqp);
3546 iwdev = iwqp->iwdev;
3547 dev = &iwdev->sc_dev;
3548 cm_node = (struct i40iw_cm_node *)cm_id->provider_data;
3549
3550 if (((struct sockaddr_in *)&cm_id->local_addr)->sin_family == AF_INET) {
3551 cm_node->ipv4 = true;
3552 cm_node->vlan_id = i40iw_get_vlan_ipv4(cm_node->loc_addr);
3553 } else {
3554 cm_node->ipv4 = false;
3555 i40iw_netdev_vlan_ipv6(cm_node->loc_addr, &cm_node->vlan_id, NULL);
3556 }
3557 i40iw_debug(cm_node->dev,
3558 I40IW_DEBUG_CM,
3559 "Accept vlan_id=%d\n",
3560 cm_node->vlan_id);
3561 if (cm_node->state == I40IW_CM_STATE_LISTENER_DESTROYED) {
3562 if (cm_node->loopbackpartner)
3563 i40iw_rem_ref_cm_node(cm_node->loopbackpartner);
3564 i40iw_rem_ref_cm_node(cm_node);
3565 return -EINVAL;
3566 }
3567
3568 passive_state = atomic_add_return(1, &cm_node->passive_state);
3569 if (passive_state == I40IW_SEND_RESET_EVENT) {
3570 i40iw_rem_ref_cm_node(cm_node);
3571 return -ECONNRESET;
3572 }
3573
3574 cm_node->cm_core->stats_accepts++;
3575 iwqp->cm_node = (void *)cm_node;
3576 cm_node->iwqp = iwqp;
3577
7581e96c 3578 buf_len = conn_param->private_data_len + I40IW_MAX_IETF_SIZE;
f27b4746
FL		 3579
3580 status = i40iw_allocate_dma_mem(dev->hw, &iwqp->ietf_mem, buf_len, 1);
3581
3582 if (status)
3583 return -ENOMEM;
3584 cm_node->pdata.size = conn_param->private_data_len;
3585 accept.addr = iwqp->ietf_mem.va;
3586 accept.size = i40iw_cm_build_mpa_frame(cm_node, &accept, MPA_KEY_REPLY);
3587 memcpy(accept.addr + accept.size, conn_param->private_data,
3588 conn_param->private_data_len);
3589
3590 /* setup our first outgoing iWarp send WQE (the IETF frame response) */
3591 if ((cm_node->ipv4 &&
3592 !i40iw_ipv4_is_loopback(cm_node->loc_addr[0], cm_node->rem_addr[0])) ||
3593 (!cm_node->ipv4 &&
3594 !i40iw_ipv6_is_loopback(cm_node->loc_addr, cm_node->rem_addr))) {
f27b4746
FL		 3595 iwpd = iwqp->iwpd;
3596 tagged_offset = (uintptr_t)iwqp->ietf_mem.va;
3597 ibmr = i40iw_reg_phys_mr(&iwpd->ibpd,
3598 iwqp->ietf_mem.pa,
3599 buf_len,
3600 IB_ACCESS_LOCAL_WRITE,
3601 &tagged_offset);
3602 if (IS_ERR(ibmr)) {
3603 i40iw_free_dma_mem(dev->hw, &iwqp->ietf_mem);
3604 return -ENOMEM;
3605 }
3606
3607 ibmr->pd = &iwpd->ibpd;
3608 ibmr->device = iwpd->ibpd.device;
3609 iwqp->lsmm_mr = ibmr;
3610 if (iwqp->page)
3611 iwqp->sc_qp.qp_uk.sq_base = kmap(iwqp->page);
7581e96c 3612 dev->iw_priv_qp_ops->qp_send_lsmm(&iwqp->sc_qp,
f27b4746
FL		 3613 iwqp->ietf_mem.va,
3614 (accept.size + conn_param->private_data_len),
3615 ibmr->lkey);
f27b4746
FL		 3616
3617 } else {
3618 if (iwqp->page)
3619 iwqp->sc_qp.qp_uk.sq_base = kmap(iwqp->page);
07c72d7d 3620 dev->iw_priv_qp_ops->qp_send_lsmm(&iwqp->sc_qp, NULL, 0, 0);
f27b4746
FL		 3621 }
3622
3623 if (iwqp->page)
3624 kunmap(iwqp->page);
3625
3626 iwqp->cm_id = cm_id;
3627 cm_node->cm_id = cm_id;
3628
3629 cm_id->provider_data = (void *)iwqp;
3630 iwqp->active_conn = 0;
3631
3632 cm_node->lsmm_size = accept.size + conn_param->private_data_len;
3633 i40iw_cm_init_tsa_conn(iwqp, cm_node);
3634 cm_id->add_ref(cm_id);
3635 i40iw_add_ref(&iwqp->ibqp);
3636
3637 i40iw_send_cm_event(cm_node, cm_id, IW_CM_EVENT_ESTABLISHED, 0);
3638
3639 attr.qp_state = IB_QPS_RTS;
3640 cm_node->qhash_set = false;
3641 i40iw_modify_qp(&iwqp->ibqp, &attr, IB_QP_STATE, NULL);
3642 if (cm_node->loopbackpartner) {
3643 cm_node->loopbackpartner->pdata.size = conn_param->private_data_len;
3644
3645 /* copy entire MPA frame to our cm_node's frame */
3646 memcpy(cm_node->loopbackpartner->pdata_buf,
3647 conn_param->private_data,
3648 conn_param->private_data_len);
3649 i40iw_create_event(cm_node->loopbackpartner, I40IW_CM_EVENT_CONNECTED);
3650 }
3651
3652 cm_node->accelerated = 1;
3653 if (cm_node->accept_pend) {
3654 if (!cm_node->listener)
3655 i40iw_pr_err("cm_node->listener NULL for passive node\n");
3656 atomic_dec(&cm_node->listener->pend_accepts_cnt);
3657 cm_node->accept_pend = 0;
3658 }
3659 return 0;
3660}
3661
3662/**
3663 * i40iw_reject - registered call for connection to be rejected
3664 * @cm_id: cm information for passive connection
3665 * @pdata: private data to be sent
3666 * @pdata_len: private data length
3667 */
3668int i40iw_reject(struct iw_cm_id *cm_id, const void *pdata, u8 pdata_len)
3669{
3670 struct i40iw_device *iwdev;
3671 struct i40iw_cm_node *cm_node;
3672 struct i40iw_cm_node *loopback;
3673
3674 cm_node = (struct i40iw_cm_node *)cm_id->provider_data;
3675 loopback = cm_node->loopbackpartner;
3676 cm_node->cm_id = cm_id;
3677 cm_node->pdata.size = pdata_len;
3678
3679 iwdev = to_iwdev(cm_id->device);
3680 if (!iwdev)
3681 return -EINVAL;
3682 cm_node->cm_core->stats_rejects++;
3683
3684 if (pdata_len + sizeof(struct ietf_mpa_v2) > MAX_CM_BUFFER)
3685 return -EINVAL;
3686
3687 if (loopback) {
3688 memcpy(&loopback->pdata_buf, pdata, pdata_len);
3689 loopback->pdata.size = pdata_len;
3690 }
3691
3692 return i40iw_cm_reject(cm_node, pdata, pdata_len);
3693}
3694
3695/**
3696 * i40iw_connect - registered call for connection to be established
3697 * @cm_id: cm information for passive connection
3698 * @conn_param: Information about the connection
3699 */
3700int i40iw_connect(struct iw_cm_id *cm_id, struct iw_cm_conn_param *conn_param)
3701{
3702 struct ib_qp *ibqp;
3703 struct i40iw_qp *iwqp;
3704 struct i40iw_device *iwdev;
3705 struct i40iw_cm_node *cm_node;
3706 struct i40iw_cm_info cm_info;
3707 struct sockaddr_in *laddr;
3708 struct sockaddr_in *raddr;
3709 struct sockaddr_in6 *laddr6;
3710 struct sockaddr_in6 *raddr6;
ccea5f0f 3711 bool qhash_set = false;
f27b4746
FL		 3712 int apbvt_set = 0;
3713 enum i40iw_status_code status;
f27b4746
FL		 3714
3715 ibqp = i40iw_get_qp(cm_id->device, conn_param->qpn);
3716 if (!ibqp)
3717 return -EINVAL;
3718 iwqp = to_iwqp(ibqp);
3719 if (!iwqp)
3720 return -EINVAL;
3721 iwdev = to_iwdev(iwqp->ibqp.device);
3722 if (!iwdev)
3723 return -EINVAL;
3724
8d8cd0bf
FL		 3725 laddr = (struct sockaddr_in *)&cm_id->m_local_addr;
3726 raddr = (struct sockaddr_in *)&cm_id->m_remote_addr;
3727 laddr6 = (struct sockaddr_in6 *)&cm_id->m_local_addr;
3728 raddr6 = (struct sockaddr_in6 *)&cm_id->m_remote_addr;
f27b4746
FL		 3729
3730 if (!(laddr->sin_port) || !(raddr->sin_port))
3731 return -EINVAL;
3732
3733 iwqp->active_conn = 1;
3734 iwqp->cm_id = NULL;
3735 cm_id->provider_data = iwqp;
3736
3737 /* set up the connection params for the node */
3738 if (cm_id->remote_addr.ss_family == AF_INET) {
3739 cm_info.ipv4 = true;
3740 memset(cm_info.loc_addr, 0, sizeof(cm_info.loc_addr));
3741 memset(cm_info.rem_addr, 0, sizeof(cm_info.rem_addr));
3742 cm_info.loc_addr[0] = ntohl(laddr->sin_addr.s_addr);
3743 cm_info.rem_addr[0] = ntohl(raddr->sin_addr.s_addr);
3744 cm_info.loc_port = ntohs(laddr->sin_port);
3745 cm_info.rem_port = ntohs(raddr->sin_port);
3746 cm_info.vlan_id = i40iw_get_vlan_ipv4(cm_info.loc_addr);
3747 } else {
3748 cm_info.ipv4 = false;
3749 i40iw_copy_ip_ntohl(cm_info.loc_addr,
3750 laddr6->sin6_addr.in6_u.u6_addr32);
3751 i40iw_copy_ip_ntohl(cm_info.rem_addr,
3752 raddr6->sin6_addr.in6_u.u6_addr32);
3753 cm_info.loc_port = ntohs(laddr6->sin6_port);
3754 cm_info.rem_port = ntohs(raddr6->sin6_port);
3755 i40iw_netdev_vlan_ipv6(cm_info.loc_addr, &cm_info.vlan_id, NULL);
3756 }
f27b4746 3757 cm_info.cm_id = cm_id;
0fc2dc58
HO		 3758 cm_info.user_pri = rt_tos2priority(cm_id->tos);
3759 i40iw_debug(&iwdev->sc_dev, I40IW_DEBUG_DCB, "%s TOS:[%d] UP:[%d]\n",
3760 __func__, cm_id->tos, cm_info.user_pri);
f27b4746
FL		 3761 if ((cm_info.ipv4 && (laddr->sin_addr.s_addr != raddr->sin_addr.s_addr)) ||
3762 (!cm_info.ipv4 && memcmp(laddr6->sin6_addr.in6_u.u6_addr32,
3763 raddr6->sin6_addr.in6_u.u6_addr32,
3764 sizeof(laddr6->sin6_addr.in6_u.u6_addr32)))) {
3765 status = i40iw_manage_qhash(iwdev,
3766 &cm_info,
3767 I40IW_QHASH_TYPE_TCP_ESTABLISHED,
3768 I40IW_QHASH_MANAGE_TYPE_ADD,
3769 NULL,
3770 true);
8d8cd0bf 3771 if (status)
f27b4746 3772 return -EINVAL;
ccea5f0f 3773 qhash_set = true;
f27b4746 3774 }
8d8cd0bf 3775 status = i40iw_manage_apbvt(iwdev, cm_info.loc_port, I40IW_MANAGE_APBVT_ADD);
f27b4746 3776 if (status) {
f27b4746
FL		 3777 i40iw_manage_qhash(iwdev,
3778 &cm_info,
3779 I40IW_QHASH_TYPE_TCP_ESTABLISHED,
3780 I40IW_QHASH_MANAGE_TYPE_DELETE,
3781 NULL,
3782 false);
3783 return -EINVAL;
3784 }
3785
3786 apbvt_set = 1;
3787 cm_id->add_ref(cm_id);
3788 cm_node = i40iw_create_cm_node(&iwdev->cm_core, iwdev,
3789 conn_param->private_data_len,
3790 (void *)conn_param->private_data,
3791 &cm_info);
b3437e0d
IM		 3792 if (!cm_node)
3793 goto err;
f27b4746
FL		 3794
3795 i40iw_record_ird_ord(cm_node, (u16)conn_param->ird, (u16)conn_param->ord);
3796 if (cm_node->send_rdma0_op == SEND_RDMA_READ_ZERO &&
3797 !cm_node->ord_size)
3798 cm_node->ord_size = 1;
3799
3800 cm_node->apbvt_set = apbvt_set;
ccea5f0f 3801 cm_node->qhash_set = qhash_set;
f27b4746
FL		 3802 iwqp->cm_node = cm_node;
3803 cm_node->iwqp = iwqp;
3804 iwqp->cm_id = cm_id;
3805 i40iw_add_ref(&iwqp->ibqp);
b3437e0d
IM		 3806
3807 if (cm_node->state == I40IW_CM_STATE_SYN_SENT) {
3808 if (i40iw_send_syn(cm_node, 0)) {
3809 i40iw_rem_ref_cm_node(cm_node);
3810 goto err;
3811 }
3812 }
3813
3814 i40iw_debug(cm_node->dev,
3815 I40IW_DEBUG_CM,
3816 "Api - connect(): port=0x%04x, cm_node=%p, cm_id = %p.\n",
3817 cm_node->rem_port,
3818 cm_node,
3819 cm_node->cm_id);
f27b4746 3820 return 0;
b3437e0d
IM		 3821
3822err:
3823 if (cm_node) {
3824 if (cm_node->ipv4)
3825 i40iw_debug(cm_node->dev,
3826 I40IW_DEBUG_CM,
3827 "Api - connect() FAILED: dest addr=%pI4",
3828 cm_node->rem_addr);
3829 else
3830 i40iw_debug(cm_node->dev, I40IW_DEBUG_CM,
3831 "Api - connect() FAILED: dest addr=%pI6",
3832 cm_node->rem_addr);
3833 }
3834 i40iw_manage_qhash(iwdev,
3835 &cm_info,
3836 I40IW_QHASH_TYPE_TCP_ESTABLISHED,
3837 I40IW_QHASH_MANAGE_TYPE_DELETE,
3838 NULL,
3839 false);
3840
3841 if (apbvt_set && !i40iw_listen_port_in_use(&iwdev->cm_core,
3842 cm_info.loc_port))
3843 i40iw_manage_apbvt(iwdev,
3844 cm_info.loc_port,
3845 I40IW_MANAGE_APBVT_DEL);
3846 cm_id->rem_ref(cm_id);
3847 iwdev->cm_core.stats_connect_errs++;
3848 return -ENOMEM;
f27b4746
FL		 3849}
3850
3851/**
3852 * i40iw_create_listen - registered call creating listener
3853 * @cm_id: cm information for passive connection
3854 * @backlog: to max accept pending count
3855 */
3856int i40iw_create_listen(struct iw_cm_id *cm_id, int backlog)
3857{
3858 struct i40iw_device *iwdev;
3859 struct i40iw_cm_listener *cm_listen_node;
3860 struct i40iw_cm_info cm_info;
3861 enum i40iw_status_code ret;
3862 struct sockaddr_in *laddr;
3863 struct sockaddr_in6 *laddr6;
3864 bool wildcard = false;
3865
3866 iwdev = to_iwdev(cm_id->device);
3867 if (!iwdev)
3868 return -EINVAL;
3869
8d8cd0bf
FL		 3870 laddr = (struct sockaddr_in *)&cm_id->m_local_addr;
3871 laddr6 = (struct sockaddr_in6 *)&cm_id->m_local_addr;
f27b4746
FL		 3872 memset(&cm_info, 0, sizeof(cm_info));
3873 if (laddr->sin_family == AF_INET) {
3874 cm_info.ipv4 = true;
3875 cm_info.loc_addr[0] = ntohl(laddr->sin_addr.s_addr);
3876 cm_info.loc_port = ntohs(laddr->sin_port);
3877
3878 if (laddr->sin_addr.s_addr != INADDR_ANY)
3879 cm_info.vlan_id = i40iw_get_vlan_ipv4(cm_info.loc_addr);
3880 else
3881 wildcard = true;
3882
3883 } else {
3884 cm_info.ipv4 = false;
3885 i40iw_copy_ip_ntohl(cm_info.loc_addr,
3886 laddr6->sin6_addr.in6_u.u6_addr32);
3887 cm_info.loc_port = ntohs(laddr6->sin6_port);
3888 if (ipv6_addr_type(&laddr6->sin6_addr) != IPV6_ADDR_ANY)
3889 i40iw_netdev_vlan_ipv6(cm_info.loc_addr,
3890 &cm_info.vlan_id,
3891 NULL);
3892 else
3893 wildcard = true;
3894 }
f27b4746
FL		 3895 cm_info.backlog = backlog;
3896 cm_info.cm_id = cm_id;
3897
3898 cm_listen_node = i40iw_make_listen_node(&iwdev->cm_core, iwdev, &cm_info);
3899 if (!cm_listen_node) {
3900 i40iw_pr_err("cm_listen_node == NULL\n");
3901 return -ENOMEM;
3902 }
3903
3904 cm_id->provider_data = cm_listen_node;
3905
0fc2dc58
HO		 3906 cm_listen_node->user_pri = rt_tos2priority(cm_id->tos);
3907 cm_info.user_pri = cm_listen_node->user_pri;
3908 i40iw_debug(&iwdev->sc_dev, I40IW_DEBUG_DCB, "%s TOS:[%d] UP:[%d]\n",
3909 __func__, cm_id->tos, cm_listen_node->user_pri);
3910
f27b4746 3911 if (!cm_listen_node->reused_node) {
f27b4746
FL		 3912 if (wildcard) {
3913 if (cm_info.ipv4)
3914 ret = i40iw_add_mqh_4(iwdev,
3915 &cm_info,
3916 cm_listen_node);
3917 else
3918 ret = i40iw_add_mqh_6(iwdev,
3919 &cm_info,
3920 cm_listen_node);
3921 if (ret)
3922 goto error;
3923
3924 ret = i40iw_manage_apbvt(iwdev,
8d8cd0bf 3925 cm_info.loc_port,
f27b4746
FL		 3926 I40IW_MANAGE_APBVT_ADD);
3927
3928 if (ret)
3929 goto error;
3930 } else {
3931 ret = i40iw_manage_qhash(iwdev,
3932 &cm_info,
3933 I40IW_QHASH_TYPE_TCP_SYN,
3934 I40IW_QHASH_MANAGE_TYPE_ADD,
3935 NULL,
3936 true);
3937 if (ret)
3938 goto error;
3939 cm_listen_node->qhash_set = true;
3940 ret = i40iw_manage_apbvt(iwdev,
8d8cd0bf 3941 cm_info.loc_port,
f27b4746
FL		 3942 I40IW_MANAGE_APBVT_ADD);
3943 if (ret)
3944 goto error;
3945 }
3946 }
3947 cm_id->add_ref(cm_id);
3948 cm_listen_node->cm_core->stats_listen_created++;
3949 return 0;
3950 error:
3951 i40iw_cm_del_listen(&iwdev->cm_core, (void *)cm_listen_node, false);
3952 return -EINVAL;
3953}
3954
3955/**
3956 * i40iw_destroy_listen - registered call to destroy listener
3957 * @cm_id: cm information for passive connection
3958 */
3959int i40iw_destroy_listen(struct iw_cm_id *cm_id)
3960{
3961 struct i40iw_device *iwdev;
3962
3963 iwdev = to_iwdev(cm_id->device);
3964 if (cm_id->provider_data)
3965 i40iw_cm_del_listen(&iwdev->cm_core, cm_id->provider_data, true);
3966 else
3967 i40iw_pr_err("cm_id->provider_data was NULL\n");
3968
3969 cm_id->rem_ref(cm_id);
3970
3971 return 0;
3972}
3973
3974/**
3975 * i40iw_cm_event_connected - handle connected active node
3976 * @event: the info for cm_node of connection
3977 */
3978static void i40iw_cm_event_connected(struct i40iw_cm_event *event)
3979{
3980 struct i40iw_qp *iwqp;
3981 struct i40iw_device *iwdev;
3982 struct i40iw_cm_node *cm_node;
3983 struct i40iw_sc_dev *dev;
3984 struct ib_qp_attr attr;
3985 struct iw_cm_id *cm_id;
3986 int status;
3987 bool read0;
3988
3989 cm_node = event->cm_node;
3990 cm_id = cm_node->cm_id;
3991 iwqp = (struct i40iw_qp *)cm_id->provider_data;
3992 iwdev = to_iwdev(iwqp->ibqp.device);
3993 dev = &iwdev->sc_dev;
3994
3995 if (iwqp->destroyed) {
3996 status = -ETIMEDOUT;
3997 goto error;
3998 }
3999 i40iw_cm_init_tsa_conn(iwqp, cm_node);
4000 read0 = (cm_node->send_rdma0_op == SEND_RDMA_READ_ZERO);
4001 if (iwqp->page)
4002 iwqp->sc_qp.qp_uk.sq_base = kmap(iwqp->page);
4003 dev->iw_priv_qp_ops->qp_send_rtt(&iwqp->sc_qp, read0);
4004 if (iwqp->page)
4005 kunmap(iwqp->page);
4006 status = i40iw_send_cm_event(cm_node, cm_id, IW_CM_EVENT_CONNECT_REPLY, 0);
4007 if (status)
4008 i40iw_pr_err("send cm event\n");
4009
4010 memset(&attr, 0, sizeof(attr));
4011 attr.qp_state = IB_QPS_RTS;
4012 cm_node->qhash_set = false;
4013 i40iw_modify_qp(&iwqp->ibqp, &attr, IB_QP_STATE, NULL);
4014
4015 cm_node->accelerated = 1;
4016 if (cm_node->accept_pend) {
4017 if (!cm_node->listener)
4018 i40iw_pr_err("listener is null for passive node\n");
4019 atomic_dec(&cm_node->listener->pend_accepts_cnt);
4020 cm_node->accept_pend = 0;
4021 }
4022 return;
4023
4024error:
4025 iwqp->cm_id = NULL;
4026 cm_id->provider_data = NULL;
4027 i40iw_send_cm_event(event->cm_node,
4028 cm_id,
4029 IW_CM_EVENT_CONNECT_REPLY,
4030 status);
4031 cm_id->rem_ref(cm_id);
4032 i40iw_rem_ref_cm_node(event->cm_node);
4033}
4034
4035/**
4036 * i40iw_cm_event_reset - handle reset
4037 * @event: the info for cm_node of connection
4038 */
4039static void i40iw_cm_event_reset(struct i40iw_cm_event *event)
4040{
4041 struct i40iw_cm_node *cm_node = event->cm_node;
4042 struct iw_cm_id *cm_id = cm_node->cm_id;
4043 struct i40iw_qp *iwqp;
4044
4045 if (!cm_id)
4046 return;
4047
4048 iwqp = cm_id->provider_data;
4049 if (!iwqp)
4050 return;
4051
4052 i40iw_debug(cm_node->dev,
4053 I40IW_DEBUG_CM,
4054 "reset event %p - cm_id = %p\n",
4055 event->cm_node, cm_id);
4056 iwqp->cm_id = NULL;
4057
4058 i40iw_send_cm_event(cm_node, cm_node->cm_id, IW_CM_EVENT_DISCONNECT, -ECONNRESET);
4059 i40iw_send_cm_event(cm_node, cm_node->cm_id, IW_CM_EVENT_CLOSE, 0);
4060}
4061
4062/**
4063 * i40iw_cm_event_handler - worker thread callback to send event to cm upper layer
4064 * @work: pointer of cm event info.
4065 */
4066static void i40iw_cm_event_handler(struct work_struct *work)
4067{
4068 struct i40iw_cm_event *event = container_of(work,
4069 struct i40iw_cm_event,
4070 event_work);
4071 struct i40iw_cm_node *cm_node;
4072
4073 if (!event || !event->cm_node || !event->cm_node->cm_core)
4074 return;
4075
4076 cm_node = event->cm_node;
4077
4078 switch (event->type) {
4079 case I40IW_CM_EVENT_MPA_REQ:
4080 i40iw_send_cm_event(cm_node,
4081 cm_node->cm_id,
4082 IW_CM_EVENT_CONNECT_REQUEST,
4083 0);
4084 break;
4085 case I40IW_CM_EVENT_RESET:
4086 i40iw_cm_event_reset(event);
4087 break;
4088 case I40IW_CM_EVENT_CONNECTED:
4089 if (!event->cm_node->cm_id ||
4090 (event->cm_node->state != I40IW_CM_STATE_OFFLOADED))
4091 break;
4092 i40iw_cm_event_connected(event);
4093 break;
4094 case I40IW_CM_EVENT_MPA_REJECT:
4095 if (!event->cm_node->cm_id ||
4096 (cm_node->state == I40IW_CM_STATE_OFFLOADED))
4097 break;
4098 i40iw_send_cm_event(cm_node,
4099 cm_node->cm_id,
4100 IW_CM_EVENT_CONNECT_REPLY,
4101 -ECONNREFUSED);
4102 break;
4103 case I40IW_CM_EVENT_ABORTED:
4104 if (!event->cm_node->cm_id ||
4105 (event->cm_node->state == I40IW_CM_STATE_OFFLOADED))
4106 break;
4107 i40iw_event_connect_error(event);
4108 break;
4109 default:
4110 i40iw_pr_err("event type = %d\n", event->type);
4111 break;
4112 }
4113
4114 event->cm_info.cm_id->rem_ref(event->cm_info.cm_id);
4115 i40iw_rem_ref_cm_node(event->cm_node);
4116 kfree(event);
4117}
4118
4119/**
4120 * i40iw_cm_post_event - queue event request for worker thread
4121 * @event: cm node's info for up event call
4122 */
4123static void i40iw_cm_post_event(struct i40iw_cm_event *event)
4124{
4125 atomic_inc(&event->cm_node->ref_count);
4126 event->cm_info.cm_id->add_ref(event->cm_info.cm_id);
4127 INIT_WORK(&event->event_work, i40iw_cm_event_handler);
4128
4129 queue_work(event->cm_node->cm_core->event_wq, &event->event_work);
4130}
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