1 // SPDX-License-Identifier: GPL-2.0 or Linux-OpenIB
2 /* Copyright (c) 2015 - 2021 Intel Corporation */
3 #include "main.h"
4 #include "trace.h"
5
6 static void irdma_cm_post_event(struct irdma_cm_event *event);
7 static void irdma_disconnect_worker(struct work_struct *work);
8
9 /**
10 * irdma_free_sqbuf - put back puda buffer if refcount is 0
11 * @vsi: The VSI structure of the device
12 * @bufp: puda buffer to free
13 */
irdma_free_sqbuf(struct irdma_sc_vsi * vsi,void * bufp)14 void irdma_free_sqbuf(struct irdma_sc_vsi *vsi, void *bufp)
15 {
16 struct irdma_puda_buf *buf = bufp;
17 struct irdma_puda_rsrc *ilq = vsi->ilq;
18
19 if (refcount_dec_and_test(&buf->refcount))
20 irdma_puda_ret_bufpool(ilq, buf);
21 }
22
23 /**
24 * irdma_record_ird_ord - Record IRD/ORD passed in
25 * @cm_node: connection's node
26 * @conn_ird: connection IRD
27 * @conn_ord: connection ORD
28 */
irdma_record_ird_ord(struct irdma_cm_node * cm_node,u32 conn_ird,u32 conn_ord)29 static void irdma_record_ird_ord(struct irdma_cm_node *cm_node, u32 conn_ird,
30 u32 conn_ord)
31 {
32 if (conn_ird > cm_node->dev->hw_attrs.max_hw_ird)
33 conn_ird = cm_node->dev->hw_attrs.max_hw_ird;
34
35 if (conn_ord > cm_node->dev->hw_attrs.max_hw_ord)
36 conn_ord = cm_node->dev->hw_attrs.max_hw_ord;
37 else if (!conn_ord && cm_node->send_rdma0_op == SEND_RDMA_READ_ZERO)
38 conn_ord = 1;
39 cm_node->ird_size = conn_ird;
40 cm_node->ord_size = conn_ord;
41 }
42
43 /**
44 * irdma_copy_ip_ntohl - copy IP address from network to host
45 * @dst: IP address in host order
46 * @src: IP address in network order (big endian)
47 */
irdma_copy_ip_ntohl(u32 * dst,__be32 * src)48 void irdma_copy_ip_ntohl(u32 *dst, __be32 *src)
49 {
50 *dst++ = ntohl(*src++);
51 *dst++ = ntohl(*src++);
52 *dst++ = ntohl(*src++);
53 *dst = ntohl(*src);
54 }
55
56 /**
57 * irdma_copy_ip_htonl - copy IP address from host to network order
58 * @dst: IP address in network order (big endian)
59 * @src: IP address in host order
60 */
irdma_copy_ip_htonl(__be32 * dst,u32 * src)61 void irdma_copy_ip_htonl(__be32 *dst, u32 *src)
62 {
63 *dst++ = htonl(*src++);
64 *dst++ = htonl(*src++);
65 *dst++ = htonl(*src++);
66 *dst = htonl(*src);
67 }
68
69 /**
70 * irdma_get_addr_info
71 * @cm_node: contains ip/tcp info
72 * @cm_info: to get a copy of the cm_node ip/tcp info
73 */
irdma_get_addr_info(struct irdma_cm_node * cm_node,struct irdma_cm_info * cm_info)74 static void irdma_get_addr_info(struct irdma_cm_node *cm_node,
75 struct irdma_cm_info *cm_info)
76 {
77 memset(cm_info, 0, sizeof(*cm_info));
78 cm_info->ipv4 = cm_node->ipv4;
79 cm_info->vlan_id = cm_node->vlan_id;
80 memcpy(cm_info->loc_addr, cm_node->loc_addr, sizeof(cm_info->loc_addr));
81 memcpy(cm_info->rem_addr, cm_node->rem_addr, sizeof(cm_info->rem_addr));
82 cm_info->loc_port = cm_node->loc_port;
83 cm_info->rem_port = cm_node->rem_port;
84 }
85
86 /**
87 * irdma_fill_sockaddr4 - fill in addr info for IPv4 connection
88 * @cm_node: connection's node
89 * @event: upper layer's cm event
90 */
irdma_fill_sockaddr4(struct irdma_cm_node * cm_node,struct iw_cm_event * event)91 static inline void irdma_fill_sockaddr4(struct irdma_cm_node *cm_node,
92 struct iw_cm_event *event)
93 {
94 struct sockaddr_in *laddr = (struct sockaddr_in *)&event->local_addr;
95 struct sockaddr_in *raddr = (struct sockaddr_in *)&event->remote_addr;
96
97 laddr->sin_family = AF_INET;
98 raddr->sin_family = AF_INET;
99
100 laddr->sin_port = htons(cm_node->loc_port);
101 raddr->sin_port = htons(cm_node->rem_port);
102
103 laddr->sin_addr.s_addr = htonl(cm_node->loc_addr[0]);
104 raddr->sin_addr.s_addr = htonl(cm_node->rem_addr[0]);
105 }
106
107 /**
108 * irdma_fill_sockaddr6 - fill in addr info for IPv6 connection
109 * @cm_node: connection's node
110 * @event: upper layer's cm event
111 */
irdma_fill_sockaddr6(struct irdma_cm_node * cm_node,struct iw_cm_event * event)112 static inline void irdma_fill_sockaddr6(struct irdma_cm_node *cm_node,
113 struct iw_cm_event *event)
114 {
115 struct sockaddr_in6 *laddr6 = (struct sockaddr_in6 *)&event->local_addr;
116 struct sockaddr_in6 *raddr6 = (struct sockaddr_in6 *)&event->remote_addr;
117
118 laddr6->sin6_family = AF_INET6;
119 raddr6->sin6_family = AF_INET6;
120
121 laddr6->sin6_port = htons(cm_node->loc_port);
122 raddr6->sin6_port = htons(cm_node->rem_port);
123
124 irdma_copy_ip_htonl(laddr6->sin6_addr.in6_u.u6_addr32,
125 cm_node->loc_addr);
126 irdma_copy_ip_htonl(raddr6->sin6_addr.in6_u.u6_addr32,
127 cm_node->rem_addr);
128 }
129
130 /**
131 * irdma_get_cmevent_info - for cm event upcall
132 * @cm_node: connection's node
133 * @cm_id: upper layers cm struct for the event
134 * @event: upper layer's cm event
135 */
irdma_get_cmevent_info(struct irdma_cm_node * cm_node,struct iw_cm_id * cm_id,struct iw_cm_event * event)136 static inline void irdma_get_cmevent_info(struct irdma_cm_node *cm_node,
137 struct iw_cm_id *cm_id,
138 struct iw_cm_event *event)
139 {
140 memcpy(&event->local_addr, &cm_id->m_local_addr,
141 sizeof(event->local_addr));
142 memcpy(&event->remote_addr, &cm_id->m_remote_addr,
143 sizeof(event->remote_addr));
144 if (cm_node) {
145 event->private_data = cm_node->pdata_buf;
146 event->private_data_len = (u8)cm_node->pdata.size;
147 event->ird = cm_node->ird_size;
148 event->ord = cm_node->ord_size;
149 }
150 }
151
152 /**
153 * irdma_send_cm_event - upcall cm's event handler
154 * @cm_node: connection's node
155 * @cm_id: upper layer's cm info struct
156 * @type: Event type to indicate
157 * @status: status for the event type
158 */
irdma_send_cm_event(struct irdma_cm_node * cm_node,struct iw_cm_id * cm_id,enum iw_cm_event_type type,int status)159 static int irdma_send_cm_event(struct irdma_cm_node *cm_node,
160 struct iw_cm_id *cm_id,
161 enum iw_cm_event_type type, int status)
162 {
163 struct iw_cm_event event = {};
164
165 event.event = type;
166 event.status = status;
167 trace_irdma_send_cm_event(cm_node, cm_id, type, status,
168 __builtin_return_address(0));
169
170 ibdev_dbg(&cm_node->iwdev->ibdev,
171 "CM: cm_node %p cm_id=%p state=%d accel=%d event_type=%d status=%d\n",
172 cm_node, cm_id, cm_node->accelerated, cm_node->state, type,
173 status);
174
175 switch (type) {
176 case IW_CM_EVENT_CONNECT_REQUEST:
177 if (cm_node->ipv4)
178 irdma_fill_sockaddr4(cm_node, &event);
179 else
180 irdma_fill_sockaddr6(cm_node, &event);
181 event.provider_data = cm_node;
182 event.private_data = cm_node->pdata_buf;
183 event.private_data_len = (u8)cm_node->pdata.size;
184 event.ird = cm_node->ird_size;
185 break;
186 case IW_CM_EVENT_CONNECT_REPLY:
187 irdma_get_cmevent_info(cm_node, cm_id, &event);
188 break;
189 case IW_CM_EVENT_ESTABLISHED:
190 event.ird = cm_node->ird_size;
191 event.ord = cm_node->ord_size;
192 break;
193 case IW_CM_EVENT_DISCONNECT:
194 case IW_CM_EVENT_CLOSE:
195 /* Wait if we are in RTS but havent issued the iwcm event upcall */
196 if (!cm_node->accelerated)
197 wait_for_completion(&cm_node->establish_comp);
198 break;
199 default:
200 return -EINVAL;
201 }
202
203 return cm_id->event_handler(cm_id, &event);
204 }
205
206 /**
207 * irdma_timer_list_prep - add connection nodes to a list to perform timer tasks
208 * @cm_core: cm's core
209 * @timer_list: a timer list to which cm_node will be selected
210 */
irdma_timer_list_prep(struct irdma_cm_core * cm_core,struct list_head * timer_list)211 static void irdma_timer_list_prep(struct irdma_cm_core *cm_core,
212 struct list_head *timer_list)
213 {
214 struct irdma_cm_node *cm_node;
215 int bkt;
216
217 hash_for_each_rcu(cm_core->cm_hash_tbl, bkt, cm_node, list) {
218 if ((cm_node->close_entry || cm_node->send_entry) &&
219 refcount_inc_not_zero(&cm_node->refcnt))
220 list_add(&cm_node->timer_entry, timer_list);
221 }
222 }
223
224 /**
225 * irdma_create_event - create cm event
226 * @cm_node: connection's node
227 * @type: Event type to generate
228 */
irdma_create_event(struct irdma_cm_node * cm_node,enum irdma_cm_event_type type)229 static struct irdma_cm_event *irdma_create_event(struct irdma_cm_node *cm_node,
230 enum irdma_cm_event_type type)
231 {
232 struct irdma_cm_event *event;
233
234 if (!cm_node->cm_id)
235 return NULL;
236
237 event = kzalloc(sizeof(*event), GFP_ATOMIC);
238
239 if (!event)
240 return NULL;
241
242 event->type = type;
243 event->cm_node = cm_node;
244 memcpy(event->cm_info.rem_addr, cm_node->rem_addr,
245 sizeof(event->cm_info.rem_addr));
246 memcpy(event->cm_info.loc_addr, cm_node->loc_addr,
247 sizeof(event->cm_info.loc_addr));
248 event->cm_info.rem_port = cm_node->rem_port;
249 event->cm_info.loc_port = cm_node->loc_port;
250 event->cm_info.cm_id = cm_node->cm_id;
251 ibdev_dbg(&cm_node->iwdev->ibdev,
252 "CM: node=%p event=%p type=%u dst=%pI4 src=%pI4\n", cm_node,
253 event, type, event->cm_info.loc_addr,
254 event->cm_info.rem_addr);
255 trace_irdma_create_event(cm_node, type, __builtin_return_address(0));
256 irdma_cm_post_event(event);
257
258 return event;
259 }
260
261 /**
262 * irdma_free_retrans_entry - free send entry
263 * @cm_node: connection's node
264 */
irdma_free_retrans_entry(struct irdma_cm_node * cm_node)265 static void irdma_free_retrans_entry(struct irdma_cm_node *cm_node)
266 {
267 struct irdma_device *iwdev = cm_node->iwdev;
268 struct irdma_timer_entry *send_entry;
269
270 send_entry = cm_node->send_entry;
271 if (!send_entry)
272 return;
273
274 cm_node->send_entry = NULL;
275 irdma_free_sqbuf(&iwdev->vsi, send_entry->sqbuf);
276 kfree(send_entry);
277 refcount_dec(&cm_node->refcnt);
278 }
279
280 /**
281 * irdma_cleanup_retrans_entry - free send entry with lock
282 * @cm_node: connection's node
283 */
irdma_cleanup_retrans_entry(struct irdma_cm_node * cm_node)284 static void irdma_cleanup_retrans_entry(struct irdma_cm_node *cm_node)
285 {
286 unsigned long flags;
287
288 spin_lock_irqsave(&cm_node->retrans_list_lock, flags);
289 irdma_free_retrans_entry(cm_node);
290 spin_unlock_irqrestore(&cm_node->retrans_list_lock, flags);
291 }
292
293 /**
294 * irdma_form_ah_cm_frame - get a free packet and build frame with address handle
295 * @cm_node: connection's node ionfo to use in frame
296 * @options: pointer to options info
297 * @hdr: pointer mpa header
298 * @pdata: pointer to private data
299 * @flags: indicates FIN or ACK
300 */
irdma_form_ah_cm_frame(struct irdma_cm_node * cm_node,struct irdma_kmem_info * options,struct irdma_kmem_info * hdr,struct irdma_mpa_priv_info * pdata,u8 flags)301 static struct irdma_puda_buf *irdma_form_ah_cm_frame(struct irdma_cm_node *cm_node,
302 struct irdma_kmem_info *options,
303 struct irdma_kmem_info *hdr,
304 struct irdma_mpa_priv_info *pdata,
305 u8 flags)
306 {
307 struct irdma_puda_buf *sqbuf;
308 struct irdma_sc_vsi *vsi = &cm_node->iwdev->vsi;
309 u8 *buf;
310 struct tcphdr *tcph;
311 u16 pktsize;
312 u32 opts_len = 0;
313 u32 pd_len = 0;
314 u32 hdr_len = 0;
315
316 if (!cm_node->ah || !cm_node->ah->ah_info.ah_valid) {
317 ibdev_dbg(&cm_node->iwdev->ibdev, "CM: AH invalid\n");
318 return NULL;
319 }
320
321 sqbuf = irdma_puda_get_bufpool(vsi->ilq);
322 if (!sqbuf) {
323 ibdev_dbg(&cm_node->iwdev->ibdev, "CM: SQ buf NULL\n");
324 return NULL;
325 }
326
327 sqbuf->ah_id = cm_node->ah->ah_info.ah_idx;
328 buf = sqbuf->mem.va;
329 if (options)
330 opts_len = (u32)options->size;
331
332 if (hdr)
333 hdr_len = hdr->size;
334
335 if (pdata)
336 pd_len = pdata->size;
337
338 pktsize = sizeof(*tcph) + opts_len + hdr_len + pd_len;
339
340 memset(buf, 0, pktsize);
341
342 sqbuf->totallen = pktsize;
343 sqbuf->tcphlen = sizeof(*tcph) + opts_len;
344 sqbuf->scratch = cm_node;
345
346 tcph = (struct tcphdr *)buf;
347 buf += sizeof(*tcph);
348
349 tcph->source = htons(cm_node->loc_port);
350 tcph->dest = htons(cm_node->rem_port);
351 tcph->seq = htonl(cm_node->tcp_cntxt.loc_seq_num);
352
353 if (flags & SET_ACK) {
354 cm_node->tcp_cntxt.loc_ack_num = cm_node->tcp_cntxt.rcv_nxt;
355 tcph->ack_seq = htonl(cm_node->tcp_cntxt.loc_ack_num);
356 tcph->ack = 1;
357 } else {
358 tcph->ack_seq = 0;
359 }
360
361 if (flags & SET_SYN) {
362 cm_node->tcp_cntxt.loc_seq_num++;
363 tcph->syn = 1;
364 } else {
365 cm_node->tcp_cntxt.loc_seq_num += hdr_len + pd_len;
366 }
367
368 if (flags & SET_FIN) {
369 cm_node->tcp_cntxt.loc_seq_num++;
370 tcph->fin = 1;
371 }
372
373 if (flags & SET_RST)
374 tcph->rst = 1;
375
376 tcph->doff = (u16)((sizeof(*tcph) + opts_len + 3) >> 2);
377 sqbuf->tcphlen = tcph->doff << 2;
378 tcph->window = htons(cm_node->tcp_cntxt.rcv_wnd);
379 tcph->urg_ptr = 0;
380
381 if (opts_len) {
382 memcpy(buf, options->addr, opts_len);
383 buf += opts_len;
384 }
385
386 if (hdr_len) {
387 memcpy(buf, hdr->addr, hdr_len);
388 buf += hdr_len;
389 }
390
391 if (pdata && pdata->addr)
392 memcpy(buf, pdata->addr, pdata->size);
393
394 refcount_set(&sqbuf->refcount, 1);
395
396 print_hex_dump_debug("ILQ: TRANSMIT ILQ BUFFER", DUMP_PREFIX_OFFSET,
397 16, 8, sqbuf->mem.va, sqbuf->totallen, false);
398
399 return sqbuf;
400 }
401
402 /**
403 * irdma_form_uda_cm_frame - get a free packet and build frame full tcpip packet
404 * @cm_node: connection's node ionfo to use in frame
405 * @options: pointer to options info
406 * @hdr: pointer mpa header
407 * @pdata: pointer to private data
408 * @flags: indicates FIN or ACK
409 */
irdma_form_uda_cm_frame(struct irdma_cm_node * cm_node,struct irdma_kmem_info * options,struct irdma_kmem_info * hdr,struct irdma_mpa_priv_info * pdata,u8 flags)410 static struct irdma_puda_buf *irdma_form_uda_cm_frame(struct irdma_cm_node *cm_node,
411 struct irdma_kmem_info *options,
412 struct irdma_kmem_info *hdr,
413 struct irdma_mpa_priv_info *pdata,
414 u8 flags)
415 {
416 struct irdma_puda_buf *sqbuf;
417 struct irdma_sc_vsi *vsi = &cm_node->iwdev->vsi;
418 u8 *buf;
419
420 struct tcphdr *tcph;
421 struct iphdr *iph;
422 struct ipv6hdr *ip6h;
423 struct ethhdr *ethh;
424 u16 pktsize;
425 u16 eth_hlen = ETH_HLEN;
426 u32 opts_len = 0;
427 u32 pd_len = 0;
428 u32 hdr_len = 0;
429
430 u16 vtag;
431
432 sqbuf = irdma_puda_get_bufpool(vsi->ilq);
433 if (!sqbuf)
434 return NULL;
435
436 buf = sqbuf->mem.va;
437
438 if (options)
439 opts_len = (u32)options->size;
440
441 if (hdr)
442 hdr_len = hdr->size;
443
444 if (pdata)
445 pd_len = pdata->size;
446
447 if (cm_node->vlan_id < VLAN_N_VID)
448 eth_hlen += 4;
449
450 if (cm_node->ipv4)
451 pktsize = sizeof(*iph) + sizeof(*tcph);
452 else
453 pktsize = sizeof(*ip6h) + sizeof(*tcph);
454 pktsize += opts_len + hdr_len + pd_len;
455
456 memset(buf, 0, eth_hlen + pktsize);
457
458 sqbuf->totallen = pktsize + eth_hlen;
459 sqbuf->maclen = eth_hlen;
460 sqbuf->tcphlen = sizeof(*tcph) + opts_len;
461 sqbuf->scratch = cm_node;
462
463 ethh = (struct ethhdr *)buf;
464 buf += eth_hlen;
465
466 if (cm_node->do_lpb)
467 sqbuf->do_lpb = true;
468
469 if (cm_node->ipv4) {
470 sqbuf->ipv4 = true;
471
472 iph = (struct iphdr *)buf;
473 buf += sizeof(*iph);
474 tcph = (struct tcphdr *)buf;
475 buf += sizeof(*tcph);
476
477 ether_addr_copy(ethh->h_dest, cm_node->rem_mac);
478 ether_addr_copy(ethh->h_source, cm_node->loc_mac);
479 if (cm_node->vlan_id < VLAN_N_VID) {
480 ((struct vlan_ethhdr *)ethh)->h_vlan_proto =
481 htons(ETH_P_8021Q);
482 vtag = (cm_node->user_pri << VLAN_PRIO_SHIFT) |
483 cm_node->vlan_id;
484 ((struct vlan_ethhdr *)ethh)->h_vlan_TCI = htons(vtag);
485
486 ((struct vlan_ethhdr *)ethh)->h_vlan_encapsulated_proto =
487 htons(ETH_P_IP);
488 } else {
489 ethh->h_proto = htons(ETH_P_IP);
490 }
491
492 iph->version = IPVERSION;
493 iph->ihl = 5; /* 5 * 4Byte words, IP headr len */
494 iph->tos = cm_node->tos;
495 iph->tot_len = htons(pktsize);
496 iph->id = htons(++cm_node->tcp_cntxt.loc_id);
497
498 iph->frag_off = htons(0x4000);
499 iph->ttl = 0x40;
500 iph->protocol = IPPROTO_TCP;
501 iph->saddr = htonl(cm_node->loc_addr[0]);
502 iph->daddr = htonl(cm_node->rem_addr[0]);
503 } else {
504 sqbuf->ipv4 = false;
505 ip6h = (struct ipv6hdr *)buf;
506 buf += sizeof(*ip6h);
507 tcph = (struct tcphdr *)buf;
508 buf += sizeof(*tcph);
509
510 ether_addr_copy(ethh->h_dest, cm_node->rem_mac);
511 ether_addr_copy(ethh->h_source, cm_node->loc_mac);
512 if (cm_node->vlan_id < VLAN_N_VID) {
513 ((struct vlan_ethhdr *)ethh)->h_vlan_proto =
514 htons(ETH_P_8021Q);
515 vtag = (cm_node->user_pri << VLAN_PRIO_SHIFT) |
516 cm_node->vlan_id;
517 ((struct vlan_ethhdr *)ethh)->h_vlan_TCI = htons(vtag);
518 ((struct vlan_ethhdr *)ethh)->h_vlan_encapsulated_proto =
519 htons(ETH_P_IPV6);
520 } else {
521 ethh->h_proto = htons(ETH_P_IPV6);
522 }
523 ip6h->version = 6;
524 ip6h->priority = cm_node->tos >> 4;
525 ip6h->flow_lbl[0] = cm_node->tos << 4;
526 ip6h->flow_lbl[1] = 0;
527 ip6h->flow_lbl[2] = 0;
528 ip6h->payload_len = htons(pktsize - sizeof(*ip6h));
529 ip6h->nexthdr = 6;
530 ip6h->hop_limit = 128;
531 irdma_copy_ip_htonl(ip6h->saddr.in6_u.u6_addr32,
532 cm_node->loc_addr);
533 irdma_copy_ip_htonl(ip6h->daddr.in6_u.u6_addr32,
534 cm_node->rem_addr);
535 }
536
537 tcph->source = htons(cm_node->loc_port);
538 tcph->dest = htons(cm_node->rem_port);
539 tcph->seq = htonl(cm_node->tcp_cntxt.loc_seq_num);
540
541 if (flags & SET_ACK) {
542 cm_node->tcp_cntxt.loc_ack_num = cm_node->tcp_cntxt.rcv_nxt;
543 tcph->ack_seq = htonl(cm_node->tcp_cntxt.loc_ack_num);
544 tcph->ack = 1;
545 } else {
546 tcph->ack_seq = 0;
547 }
548
549 if (flags & SET_SYN) {
550 cm_node->tcp_cntxt.loc_seq_num++;
551 tcph->syn = 1;
552 } else {
553 cm_node->tcp_cntxt.loc_seq_num += hdr_len + pd_len;
554 }
555
556 if (flags & SET_FIN) {
557 cm_node->tcp_cntxt.loc_seq_num++;
558 tcph->fin = 1;
559 }
560
561 if (flags & SET_RST)
562 tcph->rst = 1;
563
564 tcph->doff = (u16)((sizeof(*tcph) + opts_len + 3) >> 2);
565 sqbuf->tcphlen = tcph->doff << 2;
566 tcph->window = htons(cm_node->tcp_cntxt.rcv_wnd);
567 tcph->urg_ptr = 0;
568
569 if (opts_len) {
570 memcpy(buf, options->addr, opts_len);
571 buf += opts_len;
572 }
573
574 if (hdr_len) {
575 memcpy(buf, hdr->addr, hdr_len);
576 buf += hdr_len;
577 }
578
579 if (pdata && pdata->addr)
580 memcpy(buf, pdata->addr, pdata->size);
581
582 refcount_set(&sqbuf->refcount, 1);
583
584 print_hex_dump_debug("ILQ: TRANSMIT ILQ BUFFER", DUMP_PREFIX_OFFSET,
585 16, 8, sqbuf->mem.va, sqbuf->totallen, false);
586 return sqbuf;
587 }
588
589 /**
590 * irdma_send_reset - Send RST packet
591 * @cm_node: connection's node
592 */
irdma_send_reset(struct irdma_cm_node * cm_node)593 int irdma_send_reset(struct irdma_cm_node *cm_node)
594 {
595 struct irdma_puda_buf *sqbuf;
596 int flags = SET_RST | SET_ACK;
597
598 trace_irdma_send_reset(cm_node, 0, __builtin_return_address(0));
599 sqbuf = cm_node->cm_core->form_cm_frame(cm_node, NULL, NULL, NULL,
600 flags);
601 if (!sqbuf)
602 return -ENOMEM;
603
604 ibdev_dbg(&cm_node->iwdev->ibdev,
605 "CM: caller: %pS cm_node %p cm_id=%p accel=%d state=%d rem_port=0x%04x, loc_port=0x%04x rem_addr=%pI4 loc_addr=%pI4\n",
606 __builtin_return_address(0), cm_node, cm_node->cm_id,
607 cm_node->accelerated, cm_node->state, cm_node->rem_port,
608 cm_node->loc_port, cm_node->rem_addr, cm_node->loc_addr);
609
610 return irdma_schedule_cm_timer(cm_node, sqbuf, IRDMA_TIMER_TYPE_SEND, 0,
611 1);
612 }
613
614 /**
615 * irdma_active_open_err - send event for active side cm error
616 * @cm_node: connection's node
617 * @reset: Flag to send reset or not
618 */
irdma_active_open_err(struct irdma_cm_node * cm_node,bool reset)619 static void irdma_active_open_err(struct irdma_cm_node *cm_node, bool reset)
620 {
621 trace_irdma_active_open_err(cm_node, reset,
622 __builtin_return_address(0));
623 irdma_cleanup_retrans_entry(cm_node);
624 cm_node->cm_core->stats_connect_errs++;
625 if (reset) {
626 ibdev_dbg(&cm_node->iwdev->ibdev,
627 "CM: cm_node=%p state=%d\n", cm_node,
628 cm_node->state);
629 refcount_inc(&cm_node->refcnt);
630 irdma_send_reset(cm_node);
631 }
632
633 cm_node->state = IRDMA_CM_STATE_CLOSED;
634 irdma_create_event(cm_node, IRDMA_CM_EVENT_ABORTED);
635 }
636
637 /**
638 * irdma_passive_open_err - handle passive side cm error
639 * @cm_node: connection's node
640 * @reset: send reset or just free cm_node
641 */
irdma_passive_open_err(struct irdma_cm_node * cm_node,bool reset)642 static void irdma_passive_open_err(struct irdma_cm_node *cm_node, bool reset)
643 {
644 irdma_cleanup_retrans_entry(cm_node);
645 cm_node->cm_core->stats_passive_errs++;
646 cm_node->state = IRDMA_CM_STATE_CLOSED;
647 ibdev_dbg(&cm_node->iwdev->ibdev, "CM: cm_node=%p state =%d\n",
648 cm_node, cm_node->state);
649 trace_irdma_passive_open_err(cm_node, reset,
650 __builtin_return_address(0));
651 if (reset)
652 irdma_send_reset(cm_node);
653 else
654 irdma_rem_ref_cm_node(cm_node);
655 }
656
657 /**
658 * irdma_event_connect_error - to create connect error event
659 * @event: cm information for connect event
660 */
irdma_event_connect_error(struct irdma_cm_event * event)661 static void irdma_event_connect_error(struct irdma_cm_event *event)
662 {
663 struct irdma_qp *iwqp;
664 struct iw_cm_id *cm_id;
665
666 cm_id = event->cm_node->cm_id;
667 if (!cm_id)
668 return;
669
670 iwqp = cm_id->provider_data;
671
672 if (!iwqp || !iwqp->iwdev)
673 return;
674
675 iwqp->cm_id = NULL;
676 cm_id->provider_data = NULL;
677 irdma_send_cm_event(event->cm_node, cm_id, IW_CM_EVENT_CONNECT_REPLY,
678 -ECONNRESET);
679 irdma_rem_ref_cm_node(event->cm_node);
680 }
681
682 /**
683 * irdma_process_options - process options from TCP header
684 * @cm_node: connection's node
685 * @optionsloc: point to start of options
686 * @optionsize: size of all options
687 * @syn_pkt: flag if syn packet
688 */
irdma_process_options(struct irdma_cm_node * cm_node,u8 * optionsloc,u32 optionsize,u32 syn_pkt)689 static int irdma_process_options(struct irdma_cm_node *cm_node, u8 *optionsloc,
690 u32 optionsize, u32 syn_pkt)
691 {
692 u32 tmp;
693 u32 offset = 0;
694 union all_known_options *all_options;
695 char got_mss_option = 0;
696
697 while (offset < optionsize) {
698 all_options = (union all_known_options *)(optionsloc + offset);
699 switch (all_options->base.optionnum) {
700 case OPTION_NUM_EOL:
701 offset = optionsize;
702 break;
703 case OPTION_NUM_NONE:
704 offset += 1;
705 continue;
706 case OPTION_NUM_MSS:
707 ibdev_dbg(&cm_node->iwdev->ibdev,
708 "CM: MSS Length: %d Offset: %d Size: %d\n",
709 all_options->mss.len, offset, optionsize);
710 got_mss_option = 1;
711 if (all_options->mss.len != 4)
712 return -EINVAL;
713 tmp = ntohs(all_options->mss.mss);
714 if ((cm_node->ipv4 &&
715 (tmp + IRDMA_MTU_TO_MSS_IPV4) < IRDMA_MIN_MTU_IPV4) ||
716 (!cm_node->ipv4 &&
717 (tmp + IRDMA_MTU_TO_MSS_IPV6) < IRDMA_MIN_MTU_IPV6))
718 return -EINVAL;
719 if (tmp < cm_node->tcp_cntxt.mss)
720 cm_node->tcp_cntxt.mss = tmp;
721 break;
722 case OPTION_NUM_WINDOW_SCALE:
723 cm_node->tcp_cntxt.snd_wscale =
724 all_options->windowscale.shiftcount;
725 break;
726 default:
727 ibdev_dbg(&cm_node->iwdev->ibdev,
728 "CM: Unsupported TCP Option: %x\n",
729 all_options->base.optionnum);
730 break;
731 }
732 offset += all_options->base.len;
733 }
734 if (!got_mss_option && syn_pkt)
735 cm_node->tcp_cntxt.mss = IRDMA_CM_DEFAULT_MSS;
736
737 return 0;
738 }
739
740 /**
741 * irdma_handle_tcp_options - setup TCP context info after parsing TCP options
742 * @cm_node: connection's node
743 * @tcph: pointer tcp header
744 * @optionsize: size of options rcvd
745 * @passive: active or passive flag
746 */
irdma_handle_tcp_options(struct irdma_cm_node * cm_node,struct tcphdr * tcph,int optionsize,int passive)747 static int irdma_handle_tcp_options(struct irdma_cm_node *cm_node,
748 struct tcphdr *tcph, int optionsize,
749 int passive)
750 {
751 u8 *optionsloc = (u8 *)&tcph[1];
752 int ret;
753
754 if (optionsize) {
755 ret = irdma_process_options(cm_node, optionsloc, optionsize,
756 (u32)tcph->syn);
757 if (ret) {
758 ibdev_dbg(&cm_node->iwdev->ibdev,
759 "CM: Node %p, Sending Reset\n", cm_node);
760 if (passive)
761 irdma_passive_open_err(cm_node, true);
762 else
763 irdma_active_open_err(cm_node, true);
764 return ret;
765 }
766 }
767
768 cm_node->tcp_cntxt.snd_wnd = ntohs(tcph->window)
769 << cm_node->tcp_cntxt.snd_wscale;
770
771 if (cm_node->tcp_cntxt.snd_wnd > cm_node->tcp_cntxt.max_snd_wnd)
772 cm_node->tcp_cntxt.max_snd_wnd = cm_node->tcp_cntxt.snd_wnd;
773
774 return 0;
775 }
776
777 /**
778 * irdma_build_mpa_v1 - build a MPA V1 frame
779 * @cm_node: connection's node
780 * @start_addr: address where to build frame
781 * @mpa_key: to do read0 or write0
782 */
irdma_build_mpa_v1(struct irdma_cm_node * cm_node,void * start_addr,u8 mpa_key)783 static void irdma_build_mpa_v1(struct irdma_cm_node *cm_node, void *start_addr,
784 u8 mpa_key)
785 {
786 struct ietf_mpa_v1 *mpa_frame = start_addr;
787
788 switch (mpa_key) {
789 case MPA_KEY_REQUEST:
790 memcpy(mpa_frame->key, IEFT_MPA_KEY_REQ, IETF_MPA_KEY_SIZE);
791 break;
792 case MPA_KEY_REPLY:
793 memcpy(mpa_frame->key, IEFT_MPA_KEY_REP, IETF_MPA_KEY_SIZE);
794 break;
795 default:
796 break;
797 }
798 mpa_frame->flags = IETF_MPA_FLAGS_CRC;
799 mpa_frame->rev = cm_node->mpa_frame_rev;
800 mpa_frame->priv_data_len = htons(cm_node->pdata.size);
801 }
802
803 /**
804 * irdma_build_mpa_v2 - build a MPA V2 frame
805 * @cm_node: connection's node
806 * @start_addr: buffer start address
807 * @mpa_key: to do read0 or write0
808 */
irdma_build_mpa_v2(struct irdma_cm_node * cm_node,void * start_addr,u8 mpa_key)809 static void irdma_build_mpa_v2(struct irdma_cm_node *cm_node, void *start_addr,
810 u8 mpa_key)
811 {
812 struct ietf_mpa_v2 *mpa_frame = start_addr;
813 struct ietf_rtr_msg *rtr_msg = &mpa_frame->rtr_msg;
814 u16 ctrl_ird, ctrl_ord;
815
816 /* initialize the upper 5 bytes of the frame */
817 irdma_build_mpa_v1(cm_node, start_addr, mpa_key);
818 mpa_frame->flags |= IETF_MPA_V2_FLAG;
819 if (cm_node->iwdev->iw_ooo) {
820 mpa_frame->flags |= IETF_MPA_FLAGS_MARKERS;
821 cm_node->rcv_mark_en = true;
822 }
823 mpa_frame->priv_data_len = cpu_to_be16(be16_to_cpu(mpa_frame->priv_data_len) +
824 IETF_RTR_MSG_SIZE);
825
826 /* initialize RTR msg */
827 if (cm_node->mpav2_ird_ord == IETF_NO_IRD_ORD) {
828 ctrl_ird = IETF_NO_IRD_ORD;
829 ctrl_ord = IETF_NO_IRD_ORD;
830 } else {
831 ctrl_ird = (cm_node->ird_size > IETF_NO_IRD_ORD) ?
832 IETF_NO_IRD_ORD :
833 cm_node->ird_size;
834 ctrl_ord = (cm_node->ord_size > IETF_NO_IRD_ORD) ?
835 IETF_NO_IRD_ORD :
836 cm_node->ord_size;
837 }
838 ctrl_ird |= IETF_PEER_TO_PEER;
839
840 switch (mpa_key) {
841 case MPA_KEY_REQUEST:
842 ctrl_ord |= IETF_RDMA0_WRITE;
843 ctrl_ord |= IETF_RDMA0_READ;
844 break;
845 case MPA_KEY_REPLY:
846 switch (cm_node->send_rdma0_op) {
847 case SEND_RDMA_WRITE_ZERO:
848 ctrl_ord |= IETF_RDMA0_WRITE;
849 break;
850 case SEND_RDMA_READ_ZERO:
851 ctrl_ord |= IETF_RDMA0_READ;
852 break;
853 }
854 break;
855 default:
856 break;
857 }
858 rtr_msg->ctrl_ird = htons(ctrl_ird);
859 rtr_msg->ctrl_ord = htons(ctrl_ord);
860 }
861
862 /**
863 * irdma_cm_build_mpa_frame - build mpa frame for mpa version 1 or version 2
864 * @cm_node: connection's node
865 * @mpa: mpa: data buffer
866 * @mpa_key: to do read0 or write0
867 */
irdma_cm_build_mpa_frame(struct irdma_cm_node * cm_node,struct irdma_kmem_info * mpa,u8 mpa_key)868 static int irdma_cm_build_mpa_frame(struct irdma_cm_node *cm_node,
869 struct irdma_kmem_info *mpa, u8 mpa_key)
870 {
871 int hdr_len = 0;
872
873 switch (cm_node->mpa_frame_rev) {
874 case IETF_MPA_V1:
875 hdr_len = sizeof(struct ietf_mpa_v1);
876 irdma_build_mpa_v1(cm_node, mpa->addr, mpa_key);
877 break;
878 case IETF_MPA_V2:
879 hdr_len = sizeof(struct ietf_mpa_v2);
880 irdma_build_mpa_v2(cm_node, mpa->addr, mpa_key);
881 break;
882 default:
883 break;
884 }
885
886 return hdr_len;
887 }
888
889 /**
890 * irdma_send_mpa_request - active node send mpa request to passive node
891 * @cm_node: connection's node
892 */
irdma_send_mpa_request(struct irdma_cm_node * cm_node)893 static int irdma_send_mpa_request(struct irdma_cm_node *cm_node)
894 {
895 struct irdma_puda_buf *sqbuf;
896
897 cm_node->mpa_hdr.addr = &cm_node->mpa_v2_frame;
898 cm_node->mpa_hdr.size = irdma_cm_build_mpa_frame(cm_node,
899 &cm_node->mpa_hdr,
900 MPA_KEY_REQUEST);
901 if (!cm_node->mpa_hdr.size) {
902 ibdev_dbg(&cm_node->iwdev->ibdev,
903 "CM: mpa size = %d\n", cm_node->mpa_hdr.size);
904 return -EINVAL;
905 }
906
907 sqbuf = cm_node->cm_core->form_cm_frame(cm_node, NULL,
908 &cm_node->mpa_hdr,
909 &cm_node->pdata, SET_ACK);
910 if (!sqbuf)
911 return -ENOMEM;
912
913 return irdma_schedule_cm_timer(cm_node, sqbuf, IRDMA_TIMER_TYPE_SEND, 1,
914 0);
915 }
916
917 /**
918 * irdma_send_mpa_reject -
919 * @cm_node: connection's node
920 * @pdata: reject data for connection
921 * @plen: length of reject data
922 */
irdma_send_mpa_reject(struct irdma_cm_node * cm_node,const void * pdata,u8 plen)923 static int irdma_send_mpa_reject(struct irdma_cm_node *cm_node,
924 const void *pdata, u8 plen)
925 {
926 struct irdma_puda_buf *sqbuf;
927 struct irdma_mpa_priv_info priv_info;
928
929 cm_node->mpa_hdr.addr = &cm_node->mpa_v2_frame;
930 cm_node->mpa_hdr.size = irdma_cm_build_mpa_frame(cm_node,
931 &cm_node->mpa_hdr,
932 MPA_KEY_REPLY);
933
934 cm_node->mpa_frame.flags |= IETF_MPA_FLAGS_REJECT;
935 priv_info.addr = pdata;
936 priv_info.size = plen;
937
938 sqbuf = cm_node->cm_core->form_cm_frame(cm_node, NULL,
939 &cm_node->mpa_hdr, &priv_info,
940 SET_ACK | SET_FIN);
941 if (!sqbuf)
942 return -ENOMEM;
943
944 cm_node->state = IRDMA_CM_STATE_FIN_WAIT1;
945
946 return irdma_schedule_cm_timer(cm_node, sqbuf, IRDMA_TIMER_TYPE_SEND, 1,
947 0);
948 }
949
950 /**
951 * irdma_negotiate_mpa_v2_ird_ord - negotiate MPAv2 IRD/ORD
952 * @cm_node: connection's node
953 * @buf: Data pointer
954 */
irdma_negotiate_mpa_v2_ird_ord(struct irdma_cm_node * cm_node,u8 * buf)955 static int irdma_negotiate_mpa_v2_ird_ord(struct irdma_cm_node *cm_node,
956 u8 *buf)
957 {
958 struct ietf_mpa_v2 *mpa_v2_frame;
959 struct ietf_rtr_msg *rtr_msg;
960 u16 ird_size;
961 u16 ord_size;
962 u16 ctrl_ord;
963 u16 ctrl_ird;
964
965 mpa_v2_frame = (struct ietf_mpa_v2 *)buf;
966 rtr_msg = &mpa_v2_frame->rtr_msg;
967
968 /* parse rtr message */
969 ctrl_ord = ntohs(rtr_msg->ctrl_ord);
970 ctrl_ird = ntohs(rtr_msg->ctrl_ird);
971 ird_size = ctrl_ird & IETF_NO_IRD_ORD;
972 ord_size = ctrl_ord & IETF_NO_IRD_ORD;
973
974 if (!(ctrl_ird & IETF_PEER_TO_PEER))
975 return -EOPNOTSUPP;
976
977 if (ird_size == IETF_NO_IRD_ORD || ord_size == IETF_NO_IRD_ORD) {
978 cm_node->mpav2_ird_ord = IETF_NO_IRD_ORD;
979 goto negotiate_done;
980 }
981
982 if (cm_node->state != IRDMA_CM_STATE_MPAREQ_SENT) {
983 /* responder */
984 if (!ord_size && (ctrl_ord & IETF_RDMA0_READ))
985 cm_node->ird_size = 1;
986 if (cm_node->ord_size > ird_size)
987 cm_node->ord_size = ird_size;
988 } else {
989 /* initiator */
990 if (!ird_size && (ctrl_ord & IETF_RDMA0_READ))
991 /* Remote peer doesn't support RDMA0_READ */
992 return -EOPNOTSUPP;
993
994 if (cm_node->ord_size > ird_size)
995 cm_node->ord_size = ird_size;
996
997 if (cm_node->ird_size < ord_size)
998 /* no resources available */
999 return -EINVAL;
1000 }
1001
1002 negotiate_done:
1003 if (ctrl_ord & IETF_RDMA0_READ)
1004 cm_node->send_rdma0_op = SEND_RDMA_READ_ZERO;
1005 else if (ctrl_ord & IETF_RDMA0_WRITE)
1006 cm_node->send_rdma0_op = SEND_RDMA_WRITE_ZERO;
1007 else
1008 /* Not supported RDMA0 operation */
1009 return -EOPNOTSUPP;
1010
1011 ibdev_dbg(&cm_node->iwdev->ibdev,
1012 "CM: MPAV2 Negotiated ORD: %d, IRD: %d\n",
1013 cm_node->ord_size, cm_node->ird_size);
1014 trace_irdma_negotiate_mpa_v2(cm_node);
1015 return 0;
1016 }
1017
1018 /**
1019 * irdma_parse_mpa - process an IETF MPA frame
1020 * @cm_node: connection's node
1021 * @buf: Data pointer
1022 * @type: to return accept or reject
1023 * @len: Len of mpa buffer
1024 */
irdma_parse_mpa(struct irdma_cm_node * cm_node,u8 * buf,u32 * type,u32 len)1025 static int irdma_parse_mpa(struct irdma_cm_node *cm_node, u8 *buf, u32 *type,
1026 u32 len)
1027 {
1028 struct ietf_mpa_v1 *mpa_frame;
1029 int mpa_hdr_len, priv_data_len, ret;
1030
1031 *type = IRDMA_MPA_REQUEST_ACCEPT;
1032
1033 if (len < sizeof(struct ietf_mpa_v1)) {
1034 ibdev_dbg(&cm_node->iwdev->ibdev,
1035 "CM: ietf buffer small (%x)\n", len);
1036 return -EINVAL;
1037 }
1038
1039 mpa_frame = (struct ietf_mpa_v1 *)buf;
1040 mpa_hdr_len = sizeof(struct ietf_mpa_v1);
1041 priv_data_len = ntohs(mpa_frame->priv_data_len);
1042
1043 if (priv_data_len > IETF_MAX_PRIV_DATA_LEN) {
1044 ibdev_dbg(&cm_node->iwdev->ibdev,
1045 "CM: private_data too big %d\n", priv_data_len);
1046 return -EOVERFLOW;
1047 }
1048
1049 if (mpa_frame->rev != IETF_MPA_V1 && mpa_frame->rev != IETF_MPA_V2) {
1050 ibdev_dbg(&cm_node->iwdev->ibdev,
1051 "CM: unsupported mpa rev = %d\n", mpa_frame->rev);
1052 return -EINVAL;
1053 }
1054
1055 if (mpa_frame->rev > cm_node->mpa_frame_rev) {
1056 ibdev_dbg(&cm_node->iwdev->ibdev, "CM: rev %d\n",
1057 mpa_frame->rev);
1058 return -EINVAL;
1059 }
1060
1061 cm_node->mpa_frame_rev = mpa_frame->rev;
1062 if (cm_node->state != IRDMA_CM_STATE_MPAREQ_SENT) {
1063 if (memcmp(mpa_frame->key, IEFT_MPA_KEY_REQ,
1064 IETF_MPA_KEY_SIZE)) {
1065 ibdev_dbg(&cm_node->iwdev->ibdev,
1066 "CM: Unexpected MPA Key received\n");
1067 return -EINVAL;
1068 }
1069 } else {
1070 if (memcmp(mpa_frame->key, IEFT_MPA_KEY_REP,
1071 IETF_MPA_KEY_SIZE)) {
1072 ibdev_dbg(&cm_node->iwdev->ibdev,
1073 "CM: Unexpected MPA Key received\n");
1074 return -EINVAL;
1075 }
1076 }
1077
1078 if (priv_data_len + mpa_hdr_len > len) {
1079 ibdev_dbg(&cm_node->iwdev->ibdev,
1080 "CM: ietf buffer len(%x + %x != %x)\n",
1081 priv_data_len, mpa_hdr_len, len);
1082 return -EOVERFLOW;
1083 }
1084
1085 if (len > IRDMA_MAX_CM_BUF) {
1086 ibdev_dbg(&cm_node->iwdev->ibdev,
1087 "CM: ietf buffer large len = %d\n", len);
1088 return -EOVERFLOW;
1089 }
1090
1091 switch (mpa_frame->rev) {
1092 case IETF_MPA_V2:
1093 mpa_hdr_len += IETF_RTR_MSG_SIZE;
1094 ret = irdma_negotiate_mpa_v2_ird_ord(cm_node, buf);
1095 if (ret)
1096 return ret;
1097 break;
1098 case IETF_MPA_V1:
1099 default:
1100 break;
1101 }
1102
1103 memcpy(cm_node->pdata_buf, buf + mpa_hdr_len, priv_data_len);
1104 cm_node->pdata.size = priv_data_len;
1105
1106 if (mpa_frame->flags & IETF_MPA_FLAGS_REJECT)
1107 *type = IRDMA_MPA_REQUEST_REJECT;
1108
1109 if (mpa_frame->flags & IETF_MPA_FLAGS_MARKERS)
1110 cm_node->snd_mark_en = true;
1111
1112 return 0;
1113 }
1114
1115 /**
1116 * irdma_schedule_cm_timer
1117 * @cm_node: connection's node
1118 * @sqbuf: buffer to send
1119 * @type: if it is send or close
1120 * @send_retrans: if rexmits to be done
1121 * @close_when_complete: is cm_node to be removed
1122 *
1123 * note - cm_node needs to be protected before calling this. Encase in:
1124 * irdma_rem_ref_cm_node(cm_core, cm_node);
1125 * irdma_schedule_cm_timer(...)
1126 * refcount_inc(&cm_node->refcnt);
1127 */
irdma_schedule_cm_timer(struct irdma_cm_node * cm_node,struct irdma_puda_buf * sqbuf,enum irdma_timer_type type,int send_retrans,int close_when_complete)1128 int irdma_schedule_cm_timer(struct irdma_cm_node *cm_node,
1129 struct irdma_puda_buf *sqbuf,
1130 enum irdma_timer_type type, int send_retrans,
1131 int close_when_complete)
1132 {
1133 struct irdma_sc_vsi *vsi = &cm_node->iwdev->vsi;
1134 struct irdma_cm_core *cm_core = cm_node->cm_core;
1135 struct irdma_timer_entry *new_send;
1136 u32 was_timer_set;
1137 unsigned long flags;
1138
1139 new_send = kzalloc(sizeof(*new_send), GFP_ATOMIC);
1140 if (!new_send) {
1141 if (type != IRDMA_TIMER_TYPE_CLOSE)
1142 irdma_free_sqbuf(vsi, sqbuf);
1143 return -ENOMEM;
1144 }
1145
1146 new_send->retrycount = IRDMA_DEFAULT_RETRYS;
1147 new_send->retranscount = IRDMA_DEFAULT_RETRANS;
1148 new_send->sqbuf = sqbuf;
1149 new_send->timetosend = jiffies;
1150 new_send->type = type;
1151 new_send->send_retrans = send_retrans;
1152 new_send->close_when_complete = close_when_complete;
1153
1154 if (type == IRDMA_TIMER_TYPE_CLOSE) {
1155 new_send->timetosend += (HZ / 10);
1156 if (cm_node->close_entry) {
1157 kfree(new_send);
1158 ibdev_dbg(&cm_node->iwdev->ibdev,
1159 "CM: already close entry\n");
1160 return -EINVAL;
1161 }
1162
1163 cm_node->close_entry = new_send;
1164 } else { /* type == IRDMA_TIMER_TYPE_SEND */
1165 spin_lock_irqsave(&cm_node->retrans_list_lock, flags);
1166 cm_node->send_entry = new_send;
1167 refcount_inc(&cm_node->refcnt);
1168 spin_unlock_irqrestore(&cm_node->retrans_list_lock, flags);
1169 new_send->timetosend = jiffies + IRDMA_RETRY_TIMEOUT;
1170
1171 refcount_inc(&sqbuf->refcount);
1172 irdma_puda_send_buf(vsi->ilq, sqbuf);
1173 if (!send_retrans) {
1174 irdma_cleanup_retrans_entry(cm_node);
1175 if (close_when_complete)
1176 irdma_rem_ref_cm_node(cm_node);
1177 return 0;
1178 }
1179 }
1180
1181 spin_lock_irqsave(&cm_core->ht_lock, flags);
1182 was_timer_set = timer_pending(&cm_core->tcp_timer);
1183
1184 if (!was_timer_set) {
1185 cm_core->tcp_timer.expires = new_send->timetosend;
1186 add_timer(&cm_core->tcp_timer);
1187 }
1188 spin_unlock_irqrestore(&cm_core->ht_lock, flags);
1189
1190 return 0;
1191 }
1192
1193 /**
1194 * irdma_retrans_expired - Could not rexmit the packet
1195 * @cm_node: connection's node
1196 */
irdma_retrans_expired(struct irdma_cm_node * cm_node)1197 static void irdma_retrans_expired(struct irdma_cm_node *cm_node)
1198 {
1199 enum irdma_cm_node_state state = cm_node->state;
1200
1201 cm_node->state = IRDMA_CM_STATE_CLOSED;
1202 switch (state) {
1203 case IRDMA_CM_STATE_SYN_RCVD:
1204 case IRDMA_CM_STATE_CLOSING:
1205 irdma_rem_ref_cm_node(cm_node);
1206 break;
1207 case IRDMA_CM_STATE_FIN_WAIT1:
1208 case IRDMA_CM_STATE_LAST_ACK:
1209 irdma_send_reset(cm_node);
1210 break;
1211 default:
1212 refcount_inc(&cm_node->refcnt);
1213 irdma_send_reset(cm_node);
1214 irdma_create_event(cm_node, IRDMA_CM_EVENT_ABORTED);
1215 break;
1216 }
1217 }
1218
1219 /**
1220 * irdma_handle_close_entry - for handling retry/timeouts
1221 * @cm_node: connection's node
1222 * @rem_node: flag for remove cm_node
1223 */
irdma_handle_close_entry(struct irdma_cm_node * cm_node,u32 rem_node)1224 static void irdma_handle_close_entry(struct irdma_cm_node *cm_node,
1225 u32 rem_node)
1226 {
1227 struct irdma_timer_entry *close_entry = cm_node->close_entry;
1228 struct irdma_qp *iwqp;
1229 unsigned long flags;
1230
1231 if (!close_entry)
1232 return;
1233 iwqp = (struct irdma_qp *)close_entry->sqbuf;
1234 if (iwqp) {
1235 spin_lock_irqsave(&iwqp->lock, flags);
1236 if (iwqp->cm_id) {
1237 iwqp->hw_tcp_state = IRDMA_TCP_STATE_CLOSED;
1238 iwqp->hw_iwarp_state = IRDMA_QP_STATE_ERROR;
1239 iwqp->last_aeq = IRDMA_AE_RESET_SENT;
1240 iwqp->ibqp_state = IB_QPS_ERR;
1241 spin_unlock_irqrestore(&iwqp->lock, flags);
1242 irdma_cm_disconn(iwqp);
1243 } else {
1244 spin_unlock_irqrestore(&iwqp->lock, flags);
1245 }
1246 } else if (rem_node) {
1247 /* TIME_WAIT state */
1248 irdma_rem_ref_cm_node(cm_node);
1249 }
1250
1251 kfree(close_entry);
1252 cm_node->close_entry = NULL;
1253 }
1254
1255 /**
1256 * irdma_cm_timer_tick - system's timer expired callback
1257 * @t: Pointer to timer_list
1258 */
irdma_cm_timer_tick(struct timer_list * t)1259 static void irdma_cm_timer_tick(struct timer_list *t)
1260 {
1261 unsigned long nexttimeout = jiffies + IRDMA_LONG_TIME;
1262 struct irdma_cm_node *cm_node;
1263 struct irdma_timer_entry *send_entry, *close_entry;
1264 struct list_head *list_core_temp;
1265 struct list_head *list_node;
1266 struct irdma_cm_core *cm_core = from_timer(cm_core, t, tcp_timer);
1267 struct irdma_sc_vsi *vsi;
1268 u32 settimer = 0;
1269 unsigned long timetosend;
1270 unsigned long flags;
1271 struct list_head timer_list;
1272
1273 INIT_LIST_HEAD(&timer_list);
1274
1275 rcu_read_lock();
1276 irdma_timer_list_prep(cm_core, &timer_list);
1277 rcu_read_unlock();
1278
1279 list_for_each_safe (list_node, list_core_temp, &timer_list) {
1280 cm_node = container_of(list_node, struct irdma_cm_node,
1281 timer_entry);
1282 close_entry = cm_node->close_entry;
1283
1284 if (close_entry) {
1285 if (time_after(close_entry->timetosend, jiffies)) {
1286 if (nexttimeout > close_entry->timetosend ||
1287 !settimer) {
1288 nexttimeout = close_entry->timetosend;
1289 settimer = 1;
1290 }
1291 } else {
1292 irdma_handle_close_entry(cm_node, 1);
1293 }
1294 }
1295
1296 spin_lock_irqsave(&cm_node->retrans_list_lock, flags);
1297
1298 send_entry = cm_node->send_entry;
1299 if (!send_entry)
1300 goto done;
1301 if (time_after(send_entry->timetosend, jiffies)) {
1302 if (cm_node->state != IRDMA_CM_STATE_OFFLOADED) {
1303 if (nexttimeout > send_entry->timetosend ||
1304 !settimer) {
1305 nexttimeout = send_entry->timetosend;
1306 settimer = 1;
1307 }
1308 } else {
1309 irdma_free_retrans_entry(cm_node);
1310 }
1311 goto done;
1312 }
1313
1314 if (cm_node->state == IRDMA_CM_STATE_OFFLOADED ||
1315 cm_node->state == IRDMA_CM_STATE_CLOSED) {
1316 irdma_free_retrans_entry(cm_node);
1317 goto done;
1318 }
1319
1320 if (!send_entry->retranscount || !send_entry->retrycount) {
1321 irdma_free_retrans_entry(cm_node);
1322
1323 spin_unlock_irqrestore(&cm_node->retrans_list_lock,
1324 flags);
1325 irdma_retrans_expired(cm_node);
1326 cm_node->state = IRDMA_CM_STATE_CLOSED;
1327 spin_lock_irqsave(&cm_node->retrans_list_lock, flags);
1328 goto done;
1329 }
1330 spin_unlock_irqrestore(&cm_node->retrans_list_lock, flags);
1331
1332 vsi = &cm_node->iwdev->vsi;
1333 if (!cm_node->ack_rcvd) {
1334 refcount_inc(&send_entry->sqbuf->refcount);
1335 irdma_puda_send_buf(vsi->ilq, send_entry->sqbuf);
1336 cm_node->cm_core->stats_pkt_retrans++;
1337 }
1338
1339 spin_lock_irqsave(&cm_node->retrans_list_lock, flags);
1340 if (send_entry->send_retrans) {
1341 send_entry->retranscount--;
1342 timetosend = (IRDMA_RETRY_TIMEOUT <<
1343 (IRDMA_DEFAULT_RETRANS -
1344 send_entry->retranscount));
1345
1346 send_entry->timetosend = jiffies +
1347 min(timetosend, IRDMA_MAX_TIMEOUT);
1348 if (nexttimeout > send_entry->timetosend || !settimer) {
1349 nexttimeout = send_entry->timetosend;
1350 settimer = 1;
1351 }
1352 } else {
1353 int close_when_complete;
1354
1355 close_when_complete = send_entry->close_when_complete;
1356 irdma_free_retrans_entry(cm_node);
1357 if (close_when_complete)
1358 irdma_rem_ref_cm_node(cm_node);
1359 }
1360 done:
1361 spin_unlock_irqrestore(&cm_node->retrans_list_lock, flags);
1362 irdma_rem_ref_cm_node(cm_node);
1363 }
1364
1365 if (settimer) {
1366 spin_lock_irqsave(&cm_core->ht_lock, flags);
1367 if (!timer_pending(&cm_core->tcp_timer)) {
1368 cm_core->tcp_timer.expires = nexttimeout;
1369 add_timer(&cm_core->tcp_timer);
1370 }
1371 spin_unlock_irqrestore(&cm_core->ht_lock, flags);
1372 }
1373 }
1374
1375 /**
1376 * irdma_send_syn - send SYN packet
1377 * @cm_node: connection's node
1378 * @sendack: flag to set ACK bit or not
1379 */
irdma_send_syn(struct irdma_cm_node * cm_node,u32 sendack)1380 int irdma_send_syn(struct irdma_cm_node *cm_node, u32 sendack)
1381 {
1382 struct irdma_puda_buf *sqbuf;
1383 int flags = SET_SYN;
1384 char optionsbuf[sizeof(struct option_mss) +
1385 sizeof(struct option_windowscale) +
1386 sizeof(struct option_base) + TCP_OPTIONS_PADDING];
1387 struct irdma_kmem_info opts;
1388 int optionssize = 0;
1389 /* Sending MSS option */
1390 union all_known_options *options;
1391
1392 opts.addr = optionsbuf;
1393 if (!cm_node)
1394 return -EINVAL;
1395
1396 options = (union all_known_options *)&optionsbuf[optionssize];
1397 options->mss.optionnum = OPTION_NUM_MSS;
1398 options->mss.len = sizeof(struct option_mss);
1399 options->mss.mss = htons(cm_node->tcp_cntxt.mss);
1400 optionssize += sizeof(struct option_mss);
1401
1402 options = (union all_known_options *)&optionsbuf[optionssize];
1403 options->windowscale.optionnum = OPTION_NUM_WINDOW_SCALE;
1404 options->windowscale.len = sizeof(struct option_windowscale);
1405 options->windowscale.shiftcount = cm_node->tcp_cntxt.rcv_wscale;
1406 optionssize += sizeof(struct option_windowscale);
1407 options = (union all_known_options *)&optionsbuf[optionssize];
1408 options->eol = OPTION_NUM_EOL;
1409 optionssize += 1;
1410
1411 if (sendack)
1412 flags |= SET_ACK;
1413
1414 opts.size = optionssize;
1415
1416 sqbuf = cm_node->cm_core->form_cm_frame(cm_node, &opts, NULL, NULL,
1417 flags);
1418 if (!sqbuf)
1419 return -ENOMEM;
1420
1421 return irdma_schedule_cm_timer(cm_node, sqbuf, IRDMA_TIMER_TYPE_SEND, 1,
1422 0);
1423 }
1424
1425 /**
1426 * irdma_send_ack - Send ACK packet
1427 * @cm_node: connection's node
1428 */
irdma_send_ack(struct irdma_cm_node * cm_node)1429 void irdma_send_ack(struct irdma_cm_node *cm_node)
1430 {
1431 struct irdma_puda_buf *sqbuf;
1432 struct irdma_sc_vsi *vsi = &cm_node->iwdev->vsi;
1433
1434 sqbuf = cm_node->cm_core->form_cm_frame(cm_node, NULL, NULL, NULL,
1435 SET_ACK);
1436 if (sqbuf)
1437 irdma_puda_send_buf(vsi->ilq, sqbuf);
1438 }
1439
1440 /**
1441 * irdma_send_fin - Send FIN pkt
1442 * @cm_node: connection's node
1443 */
irdma_send_fin(struct irdma_cm_node * cm_node)1444 static int irdma_send_fin(struct irdma_cm_node *cm_node)
1445 {
1446 struct irdma_puda_buf *sqbuf;
1447
1448 sqbuf = cm_node->cm_core->form_cm_frame(cm_node, NULL, NULL, NULL,
1449 SET_ACK | SET_FIN);
1450 if (!sqbuf)
1451 return -ENOMEM;
1452
1453 return irdma_schedule_cm_timer(cm_node, sqbuf, IRDMA_TIMER_TYPE_SEND, 1,
1454 0);
1455 }
1456
1457 /**
1458 * irdma_find_listener - find a cm node listening on this addr-port pair
1459 * @cm_core: cm's core
1460 * @dst_addr: listener ip addr
1461 * @dst_port: listener tcp port num
1462 * @vlan_id: virtual LAN ID
1463 * @listener_state: state to match with listen node's
1464 */
1465 static struct irdma_cm_listener *
irdma_find_listener(struct irdma_cm_core * cm_core,u32 * dst_addr,u16 dst_port,u16 vlan_id,enum irdma_cm_listener_state listener_state)1466 irdma_find_listener(struct irdma_cm_core *cm_core, u32 *dst_addr, u16 dst_port,
1467 u16 vlan_id, enum irdma_cm_listener_state listener_state)
1468 {
1469 struct irdma_cm_listener *listen_node;
1470 static const u32 ip_zero[4] = { 0, 0, 0, 0 };
1471 u32 listen_addr[4];
1472 u16 listen_port;
1473 unsigned long flags;
1474
1475 /* walk list and find cm_node associated with this session ID */
1476 spin_lock_irqsave(&cm_core->listen_list_lock, flags);
1477 list_for_each_entry (listen_node, &cm_core->listen_list, list) {
1478 memcpy(listen_addr, listen_node->loc_addr, sizeof(listen_addr));
1479 listen_port = listen_node->loc_port;
1480 if (listen_port != dst_port ||
1481 !(listener_state & listen_node->listener_state))
1482 continue;
1483 /* compare node pair, return node handle if a match */
1484 if (!memcmp(listen_addr, ip_zero, sizeof(listen_addr)) ||
1485 (!memcmp(listen_addr, dst_addr, sizeof(listen_addr)) &&
1486 vlan_id == listen_node->vlan_id)) {
1487 refcount_inc(&listen_node->refcnt);
1488 spin_unlock_irqrestore(&cm_core->listen_list_lock,
1489 flags);
1490 trace_irdma_find_listener(listen_node);
1491 return listen_node;
1492 }
1493 }
1494 spin_unlock_irqrestore(&cm_core->listen_list_lock, flags);
1495
1496 return NULL;
1497 }
1498
1499 /**
1500 * irdma_del_multiple_qhash - Remove qhash and child listens
1501 * @iwdev: iWarp device
1502 * @cm_info: CM info for parent listen node
1503 * @cm_parent_listen_node: The parent listen node
1504 */
irdma_del_multiple_qhash(struct irdma_device * iwdev,struct irdma_cm_info * cm_info,struct irdma_cm_listener * cm_parent_listen_node)1505 static int irdma_del_multiple_qhash(struct irdma_device *iwdev,
1506 struct irdma_cm_info *cm_info,
1507 struct irdma_cm_listener *cm_parent_listen_node)
1508 {
1509 struct irdma_cm_listener *child_listen_node;
1510 struct list_head *pos, *tpos;
1511 unsigned long flags;
1512 int ret = -EINVAL;
1513
1514 spin_lock_irqsave(&iwdev->cm_core.listen_list_lock, flags);
1515 list_for_each_safe (pos, tpos,
1516 &cm_parent_listen_node->child_listen_list) {
1517 child_listen_node = list_entry(pos, struct irdma_cm_listener,
1518 child_listen_list);
1519 if (child_listen_node->ipv4)
1520 ibdev_dbg(&iwdev->ibdev,
1521 "CM: removing child listen for IP=%pI4, port=%d, vlan=%d\n",
1522 child_listen_node->loc_addr,
1523 child_listen_node->loc_port,
1524 child_listen_node->vlan_id);
1525 else
1526 ibdev_dbg(&iwdev->ibdev,
1527 "CM: removing child listen for IP=%pI6, port=%d, vlan=%d\n",
1528 child_listen_node->loc_addr,
1529 child_listen_node->loc_port,
1530 child_listen_node->vlan_id);
1531 trace_irdma_del_multiple_qhash(child_listen_node);
1532 list_del(pos);
1533 memcpy(cm_info->loc_addr, child_listen_node->loc_addr,
1534 sizeof(cm_info->loc_addr));
1535 cm_info->vlan_id = child_listen_node->vlan_id;
1536 if (child_listen_node->qhash_set) {
1537 ret = irdma_manage_qhash(iwdev, cm_info,
1538 IRDMA_QHASH_TYPE_TCP_SYN,
1539 IRDMA_QHASH_MANAGE_TYPE_DELETE,
1540 NULL, false);
1541 child_listen_node->qhash_set = false;
1542 } else {
1543 ret = 0;
1544 }
1545 ibdev_dbg(&iwdev->ibdev,
1546 "CM: Child listen node freed = %p\n",
1547 child_listen_node);
1548 kfree(child_listen_node);
1549 cm_parent_listen_node->cm_core->stats_listen_nodes_destroyed++;
1550 }
1551 spin_unlock_irqrestore(&iwdev->cm_core.listen_list_lock, flags);
1552
1553 return ret;
1554 }
1555
1556 /**
1557 * irdma_netdev_vlan_ipv6 - Gets the netdev and mac
1558 * @addr: local IPv6 address
1559 * @vlan_id: vlan id for the given IPv6 address
1560 * @mac: mac address for the given IPv6 address
1561 *
1562 * Returns the net_device of the IPv6 address and also sets the
1563 * vlan id and mac for that address.
1564 */
irdma_netdev_vlan_ipv6(u32 * addr,u16 * vlan_id,u8 * mac)1565 struct net_device *irdma_netdev_vlan_ipv6(u32 *addr, u16 *vlan_id, u8 *mac)
1566 {
1567 struct net_device *ip_dev = NULL;
1568 struct in6_addr laddr6;
1569
1570 if (!IS_ENABLED(CONFIG_IPV6))
1571 return NULL;
1572
1573 irdma_copy_ip_htonl(laddr6.in6_u.u6_addr32, addr);
1574 if (vlan_id)
1575 *vlan_id = 0xFFFF; /* Match rdma_vlan_dev_vlan_id() */
1576 if (mac)
1577 eth_zero_addr(mac);
1578
1579 rcu_read_lock();
1580 for_each_netdev_rcu (&init_net, ip_dev) {
1581 if (ipv6_chk_addr(&init_net, &laddr6, ip_dev, 1)) {
1582 if (vlan_id)
1583 *vlan_id = rdma_vlan_dev_vlan_id(ip_dev);
1584 if (ip_dev->dev_addr && mac)
1585 ether_addr_copy(mac, ip_dev->dev_addr);
1586 break;
1587 }
1588 }
1589 rcu_read_unlock();
1590
1591 return ip_dev;
1592 }
1593
1594 /**
1595 * irdma_get_vlan_ipv4 - Returns the vlan_id for IPv4 address
1596 * @addr: local IPv4 address
1597 */
irdma_get_vlan_ipv4(u32 * addr)1598 u16 irdma_get_vlan_ipv4(u32 *addr)
1599 {
1600 struct net_device *netdev;
1601 u16 vlan_id = 0xFFFF;
1602
1603 netdev = ip_dev_find(&init_net, htonl(addr[0]));
1604 if (netdev) {
1605 vlan_id = rdma_vlan_dev_vlan_id(netdev);
1606 dev_put(netdev);
1607 }
1608
1609 return vlan_id;
1610 }
1611
1612 /**
1613 * irdma_add_mqh_6 - Adds multiple qhashes for IPv6
1614 * @iwdev: iWarp device
1615 * @cm_info: CM info for parent listen node
1616 * @cm_parent_listen_node: The parent listen node
1617 *
1618 * Adds a qhash and a child listen node for every IPv6 address
1619 * on the adapter and adds the associated qhash filter
1620 */
irdma_add_mqh_6(struct irdma_device * iwdev,struct irdma_cm_info * cm_info,struct irdma_cm_listener * cm_parent_listen_node)1621 static int irdma_add_mqh_6(struct irdma_device *iwdev,
1622 struct irdma_cm_info *cm_info,
1623 struct irdma_cm_listener *cm_parent_listen_node)
1624 {
1625 struct net_device *ip_dev;
1626 struct inet6_dev *idev;
1627 struct inet6_ifaddr *ifp, *tmp;
1628 struct irdma_cm_listener *child_listen_node;
1629 unsigned long flags;
1630 int ret = 0;
1631
1632 rtnl_lock();
1633 for_each_netdev(&init_net, ip_dev) {
1634 if (!(ip_dev->flags & IFF_UP))
1635 continue;
1636
1637 if (((rdma_vlan_dev_vlan_id(ip_dev) >= VLAN_N_VID) ||
1638 (rdma_vlan_dev_real_dev(ip_dev) != iwdev->netdev)) &&
1639 ip_dev != iwdev->netdev)
1640 continue;
1641
1642 idev = __in6_dev_get(ip_dev);
1643 if (!idev) {
1644 ibdev_dbg(&iwdev->ibdev, "CM: idev == NULL\n");
1645 break;
1646 }
1647 list_for_each_entry_safe (ifp, tmp, &idev->addr_list, if_list) {
1648 ibdev_dbg(&iwdev->ibdev, "CM: IP=%pI6, vlan_id=%d, MAC=%pM\n",
1649 &ifp->addr, rdma_vlan_dev_vlan_id(ip_dev),
1650 ip_dev->dev_addr);
1651 child_listen_node = kzalloc(sizeof(*child_listen_node), GFP_KERNEL);
1652 ibdev_dbg(&iwdev->ibdev, "CM: Allocating child listener %p\n",
1653 child_listen_node);
1654 if (!child_listen_node) {
1655 ibdev_dbg(&iwdev->ibdev, "CM: listener memory allocation\n");
1656 ret = -ENOMEM;
1657 goto exit;
1658 }
1659
1660 cm_info->vlan_id = rdma_vlan_dev_vlan_id(ip_dev);
1661 cm_parent_listen_node->vlan_id = cm_info->vlan_id;
1662 memcpy(child_listen_node, cm_parent_listen_node,
1663 sizeof(*child_listen_node));
1664 irdma_copy_ip_ntohl(child_listen_node->loc_addr,
1665 ifp->addr.in6_u.u6_addr32);
1666 memcpy(cm_info->loc_addr, child_listen_node->loc_addr,
1667 sizeof(cm_info->loc_addr));
1668 ret = irdma_manage_qhash(iwdev, cm_info,
1669 IRDMA_QHASH_TYPE_TCP_SYN,
1670 IRDMA_QHASH_MANAGE_TYPE_ADD,
1671 NULL, true);
1672 if (ret) {
1673 kfree(child_listen_node);
1674 continue;
1675 }
1676
1677 trace_irdma_add_mqh_6(iwdev, child_listen_node,
1678 ip_dev->dev_addr);
1679
1680 child_listen_node->qhash_set = true;
1681 spin_lock_irqsave(&iwdev->cm_core.listen_list_lock, flags);
1682 list_add(&child_listen_node->child_listen_list,
1683 &cm_parent_listen_node->child_listen_list);
1684 spin_unlock_irqrestore(&iwdev->cm_core.listen_list_lock, flags);
1685 cm_parent_listen_node->cm_core->stats_listen_nodes_created++;
1686 }
1687 }
1688 exit:
1689 rtnl_unlock();
1690
1691 return ret;
1692 }
1693
1694 /**
1695 * irdma_add_mqh_4 - Adds multiple qhashes for IPv4
1696 * @iwdev: iWarp device
1697 * @cm_info: CM info for parent listen node
1698 * @cm_parent_listen_node: The parent listen node
1699 *
1700 * Adds a qhash and a child listen node for every IPv4 address
1701 * on the adapter and adds the associated qhash filter
1702 */
irdma_add_mqh_4(struct irdma_device * iwdev,struct irdma_cm_info * cm_info,struct irdma_cm_listener * cm_parent_listen_node)1703 static int irdma_add_mqh_4(struct irdma_device *iwdev,
1704 struct irdma_cm_info *cm_info,
1705 struct irdma_cm_listener *cm_parent_listen_node)
1706 {
1707 struct net_device *ip_dev;
1708 struct in_device *idev;
1709 struct irdma_cm_listener *child_listen_node;
1710 unsigned long flags;
1711 const struct in_ifaddr *ifa;
1712 int ret = 0;
1713
1714 rtnl_lock();
1715 for_each_netdev(&init_net, ip_dev) {
1716 if (!(ip_dev->flags & IFF_UP))
1717 continue;
1718
1719 if (((rdma_vlan_dev_vlan_id(ip_dev) >= VLAN_N_VID) ||
1720 (rdma_vlan_dev_real_dev(ip_dev) != iwdev->netdev)) &&
1721 ip_dev != iwdev->netdev)
1722 continue;
1723
1724 idev = in_dev_get(ip_dev);
1725 in_dev_for_each_ifa_rtnl(ifa, idev) {
1726 ibdev_dbg(&iwdev->ibdev,
1727 "CM: Allocating child CM Listener forIP=%pI4, vlan_id=%d, MAC=%pM\n",
1728 &ifa->ifa_address, rdma_vlan_dev_vlan_id(ip_dev),
1729 ip_dev->dev_addr);
1730 child_listen_node = kzalloc(sizeof(*child_listen_node), GFP_KERNEL);
1731 cm_parent_listen_node->cm_core->stats_listen_nodes_created++;
1732 ibdev_dbg(&iwdev->ibdev, "CM: Allocating child listener %p\n",
1733 child_listen_node);
1734 if (!child_listen_node) {
1735 ibdev_dbg(&iwdev->ibdev, "CM: listener memory allocation\n");
1736 in_dev_put(idev);
1737 ret = -ENOMEM;
1738 goto exit;
1739 }
1740
1741 cm_info->vlan_id = rdma_vlan_dev_vlan_id(ip_dev);
1742 cm_parent_listen_node->vlan_id = cm_info->vlan_id;
1743 memcpy(child_listen_node, cm_parent_listen_node,
1744 sizeof(*child_listen_node));
1745 child_listen_node->loc_addr[0] =
1746 ntohl(ifa->ifa_address);
1747 memcpy(cm_info->loc_addr, child_listen_node->loc_addr,
1748 sizeof(cm_info->loc_addr));
1749 ret = irdma_manage_qhash(iwdev, cm_info,
1750 IRDMA_QHASH_TYPE_TCP_SYN,
1751 IRDMA_QHASH_MANAGE_TYPE_ADD,
1752 NULL, true);
1753 if (ret) {
1754 kfree(child_listen_node);
1755 cm_parent_listen_node->cm_core
1756 ->stats_listen_nodes_created--;
1757 continue;
1758 }
1759
1760 trace_irdma_add_mqh_4(iwdev, child_listen_node,
1761 ip_dev->dev_addr);
1762
1763 child_listen_node->qhash_set = true;
1764 spin_lock_irqsave(&iwdev->cm_core.listen_list_lock,
1765 flags);
1766 list_add(&child_listen_node->child_listen_list,
1767 &cm_parent_listen_node->child_listen_list);
1768 spin_unlock_irqrestore(&iwdev->cm_core.listen_list_lock, flags);
1769 }
1770 in_dev_put(idev);
1771 }
1772 exit:
1773 rtnl_unlock();
1774
1775 return ret;
1776 }
1777
1778 /**
1779 * irdma_add_mqh - Adds multiple qhashes
1780 * @iwdev: iWarp device
1781 * @cm_info: CM info for parent listen node
1782 * @cm_listen_node: The parent listen node
1783 */
irdma_add_mqh(struct irdma_device * iwdev,struct irdma_cm_info * cm_info,struct irdma_cm_listener * cm_listen_node)1784 static int irdma_add_mqh(struct irdma_device *iwdev,
1785 struct irdma_cm_info *cm_info,
1786 struct irdma_cm_listener *cm_listen_node)
1787 {
1788 if (cm_info->ipv4)
1789 return irdma_add_mqh_4(iwdev, cm_info, cm_listen_node);
1790 else
1791 return irdma_add_mqh_6(iwdev, cm_info, cm_listen_node);
1792 }
1793
1794 /**
1795 * irdma_reset_list_prep - add connection nodes slated for reset to list
1796 * @cm_core: cm's core
1797 * @listener: pointer to listener node
1798 * @reset_list: a list to which cm_node will be selected
1799 */
irdma_reset_list_prep(struct irdma_cm_core * cm_core,struct irdma_cm_listener * listener,struct list_head * reset_list)1800 static void irdma_reset_list_prep(struct irdma_cm_core *cm_core,
1801 struct irdma_cm_listener *listener,
1802 struct list_head *reset_list)
1803 {
1804 struct irdma_cm_node *cm_node;
1805 int bkt;
1806
1807 hash_for_each_rcu(cm_core->cm_hash_tbl, bkt, cm_node, list) {
1808 if (cm_node->listener == listener &&
1809 !cm_node->accelerated &&
1810 refcount_inc_not_zero(&cm_node->refcnt))
1811 list_add(&cm_node->reset_entry, reset_list);
1812 }
1813 }
1814
1815 /**
1816 * irdma_dec_refcnt_listen - delete listener and associated cm nodes
1817 * @cm_core: cm's core
1818 * @listener: pointer to listener node
1819 * @free_hanging_nodes: to free associated cm_nodes
1820 * @apbvt_del: flag to delete the apbvt
1821 */
irdma_dec_refcnt_listen(struct irdma_cm_core * cm_core,struct irdma_cm_listener * listener,int free_hanging_nodes,bool apbvt_del)1822 static int irdma_dec_refcnt_listen(struct irdma_cm_core *cm_core,
1823 struct irdma_cm_listener *listener,
1824 int free_hanging_nodes, bool apbvt_del)
1825 {
1826 int err;
1827 struct list_head *list_pos;
1828 struct list_head *list_temp;
1829 struct irdma_cm_node *cm_node;
1830 struct list_head reset_list;
1831 struct irdma_cm_info nfo;
1832 enum irdma_cm_node_state old_state;
1833 unsigned long flags;
1834
1835 trace_irdma_dec_refcnt_listen(listener, __builtin_return_address(0));
1836 /* free non-accelerated child nodes for this listener */
1837 INIT_LIST_HEAD(&reset_list);
1838 if (free_hanging_nodes) {
1839 rcu_read_lock();
1840 irdma_reset_list_prep(cm_core, listener, &reset_list);
1841 rcu_read_unlock();
1842 }
1843
1844 list_for_each_safe (list_pos, list_temp, &reset_list) {
1845 cm_node = container_of(list_pos, struct irdma_cm_node,
1846 reset_entry);
1847 if (cm_node->state >= IRDMA_CM_STATE_FIN_WAIT1) {
1848 irdma_rem_ref_cm_node(cm_node);
1849 continue;
1850 }
1851
1852 irdma_cleanup_retrans_entry(cm_node);
1853 err = irdma_send_reset(cm_node);
1854 if (err) {
1855 cm_node->state = IRDMA_CM_STATE_CLOSED;
1856 ibdev_dbg(&cm_node->iwdev->ibdev,
1857 "CM: send reset failed\n");
1858 } else {
1859 old_state = cm_node->state;
1860 cm_node->state = IRDMA_CM_STATE_LISTENER_DESTROYED;
1861 if (old_state != IRDMA_CM_STATE_MPAREQ_RCVD)
1862 irdma_rem_ref_cm_node(cm_node);
1863 }
1864 }
1865
1866 if (refcount_dec_and_test(&listener->refcnt)) {
1867 spin_lock_irqsave(&cm_core->listen_list_lock, flags);
1868 list_del(&listener->list);
1869 spin_unlock_irqrestore(&cm_core->listen_list_lock, flags);
1870
1871 if (apbvt_del)
1872 irdma_del_apbvt(listener->iwdev,
1873 listener->apbvt_entry);
1874 memcpy(nfo.loc_addr, listener->loc_addr, sizeof(nfo.loc_addr));
1875 nfo.loc_port = listener->loc_port;
1876 nfo.ipv4 = listener->ipv4;
1877 nfo.vlan_id = listener->vlan_id;
1878 nfo.user_pri = listener->user_pri;
1879 nfo.qh_qpid = listener->iwdev->vsi.ilq->qp_id;
1880
1881 if (!list_empty(&listener->child_listen_list)) {
1882 irdma_del_multiple_qhash(listener->iwdev, &nfo,
1883 listener);
1884 } else {
1885 if (listener->qhash_set)
1886 irdma_manage_qhash(listener->iwdev,
1887 &nfo,
1888 IRDMA_QHASH_TYPE_TCP_SYN,
1889 IRDMA_QHASH_MANAGE_TYPE_DELETE,
1890 NULL, false);
1891 }
1892
1893 cm_core->stats_listen_destroyed++;
1894 cm_core->stats_listen_nodes_destroyed++;
1895 ibdev_dbg(&listener->iwdev->ibdev,
1896 "CM: loc_port=0x%04x loc_addr=%pI4 cm_listen_node=%p cm_id=%p qhash_set=%d vlan_id=%d apbvt_del=%d\n",
1897 listener->loc_port, listener->loc_addr, listener,
1898 listener->cm_id, listener->qhash_set,
1899 listener->vlan_id, apbvt_del);
1900 kfree(listener);
1901 listener = NULL;
1902 return 0;
1903 }
1904
1905 return -EINVAL;
1906 }
1907
1908 /**
1909 * irdma_cm_del_listen - delete a listener
1910 * @cm_core: cm's core
1911 * @listener: passive connection's listener
1912 * @apbvt_del: flag to delete apbvt
1913 */
irdma_cm_del_listen(struct irdma_cm_core * cm_core,struct irdma_cm_listener * listener,bool apbvt_del)1914 static int irdma_cm_del_listen(struct irdma_cm_core *cm_core,
1915 struct irdma_cm_listener *listener,
1916 bool apbvt_del)
1917 {
1918 listener->listener_state = IRDMA_CM_LISTENER_PASSIVE_STATE;
1919 listener->cm_id = NULL;
1920
1921 return irdma_dec_refcnt_listen(cm_core, listener, 1, apbvt_del);
1922 }
1923
1924 /**
1925 * irdma_addr_resolve_neigh - resolve neighbor address
1926 * @iwdev: iwarp device structure
1927 * @src_ip: local ip address
1928 * @dst_ip: remote ip address
1929 * @arpindex: if there is an arp entry
1930 */
irdma_addr_resolve_neigh(struct irdma_device * iwdev,u32 src_ip,u32 dst_ip,int arpindex)1931 static int irdma_addr_resolve_neigh(struct irdma_device *iwdev, u32 src_ip,
1932 u32 dst_ip, int arpindex)
1933 {
1934 struct rtable *rt;
1935 struct neighbour *neigh;
1936 int rc = arpindex;
1937 __be32 dst_ipaddr = htonl(dst_ip);
1938 __be32 src_ipaddr = htonl(src_ip);
1939
1940 rt = ip_route_output(&init_net, dst_ipaddr, src_ipaddr, 0, 0);
1941 if (IS_ERR(rt)) {
1942 ibdev_dbg(&iwdev->ibdev, "CM: ip_route_output fail\n");
1943 return -EINVAL;
1944 }
1945
1946 neigh = dst_neigh_lookup(&rt->dst, &dst_ipaddr);
1947 if (!neigh)
1948 goto exit;
1949
1950 if (neigh->nud_state & NUD_VALID)
1951 rc = irdma_add_arp(iwdev->rf, &dst_ip, true, neigh->ha);
1952 else
1953 neigh_event_send(neigh, NULL);
1954 if (neigh)
1955 neigh_release(neigh);
1956 exit:
1957 ip_rt_put(rt);
1958
1959 return rc;
1960 }
1961
1962 /**
1963 * irdma_get_dst_ipv6 - get destination cache entry via ipv6 lookup
1964 * @src_addr: local ipv6 sock address
1965 * @dst_addr: destination ipv6 sock address
1966 */
irdma_get_dst_ipv6(struct sockaddr_in6 * src_addr,struct sockaddr_in6 * dst_addr)1967 static struct dst_entry *irdma_get_dst_ipv6(struct sockaddr_in6 *src_addr,
1968 struct sockaddr_in6 *dst_addr)
1969 {
1970 struct dst_entry *dst = NULL;
1971
1972 if ((IS_ENABLED(CONFIG_IPV6))) {
1973 struct flowi6 fl6 = {};
1974
1975 fl6.daddr = dst_addr->sin6_addr;
1976 fl6.saddr = src_addr->sin6_addr;
1977 if (ipv6_addr_type(&fl6.daddr) & IPV6_ADDR_LINKLOCAL)
1978 fl6.flowi6_oif = dst_addr->sin6_scope_id;
1979
1980 dst = ip6_route_output(&init_net, NULL, &fl6);
1981 }
1982
1983 return dst;
1984 }
1985
1986 /**
1987 * irdma_addr_resolve_neigh_ipv6 - resolve neighbor ipv6 address
1988 * @iwdev: iwarp device structure
1989 * @src: local ip address
1990 * @dest: remote ip address
1991 * @arpindex: if there is an arp entry
1992 */
irdma_addr_resolve_neigh_ipv6(struct irdma_device * iwdev,u32 * src,u32 * dest,int arpindex)1993 static int irdma_addr_resolve_neigh_ipv6(struct irdma_device *iwdev, u32 *src,
1994 u32 *dest, int arpindex)
1995 {
1996 struct neighbour *neigh;
1997 int rc = arpindex;
1998 struct dst_entry *dst;
1999 struct sockaddr_in6 dst_addr = {};
2000 struct sockaddr_in6 src_addr = {};
2001
2002 dst_addr.sin6_family = AF_INET6;
2003 irdma_copy_ip_htonl(dst_addr.sin6_addr.in6_u.u6_addr32, dest);
2004 src_addr.sin6_family = AF_INET6;
2005 irdma_copy_ip_htonl(src_addr.sin6_addr.in6_u.u6_addr32, src);
2006 dst = irdma_get_dst_ipv6(&src_addr, &dst_addr);
2007 if (!dst || dst->error) {
2008 if (dst) {
2009 dst_release(dst);
2010 ibdev_dbg(&iwdev->ibdev,
2011 "CM: ip6_route_output returned dst->error = %d\n",
2012 dst->error);
2013 }
2014 return -EINVAL;
2015 }
2016
2017 neigh = dst_neigh_lookup(dst, dst_addr.sin6_addr.in6_u.u6_addr32);
2018 if (!neigh)
2019 goto exit;
2020
2021 ibdev_dbg(&iwdev->ibdev, "CM: dst_neigh_lookup MAC=%pM\n",
2022 neigh->ha);
2023
2024 trace_irdma_addr_resolve(iwdev, neigh->ha);
2025
2026 if (neigh->nud_state & NUD_VALID)
2027 rc = irdma_add_arp(iwdev->rf, dest, false, neigh->ha);
2028 else
2029 neigh_event_send(neigh, NULL);
2030 if (neigh)
2031 neigh_release(neigh);
2032 exit:
2033 dst_release(dst);
2034
2035 return rc;
2036 }
2037
2038 /**
2039 * irdma_find_node - find a cm node that matches the reference cm node
2040 * @cm_core: cm's core
2041 * @rem_port: remote tcp port num
2042 * @rem_addr: remote ip addr
2043 * @loc_port: local tcp port num
2044 * @loc_addr: local ip addr
2045 * @vlan_id: local VLAN ID
2046 */
irdma_find_node(struct irdma_cm_core * cm_core,u16 rem_port,u32 * rem_addr,u16 loc_port,u32 * loc_addr,u16 vlan_id)2047 struct irdma_cm_node *irdma_find_node(struct irdma_cm_core *cm_core,
2048 u16 rem_port, u32 *rem_addr, u16 loc_port,
2049 u32 *loc_addr, u16 vlan_id)
2050 {
2051 struct irdma_cm_node *cm_node;
2052 u32 key = (rem_port << 16) | loc_port;
2053
2054 rcu_read_lock();
2055 hash_for_each_possible_rcu(cm_core->cm_hash_tbl, cm_node, list, key) {
2056 if (cm_node->vlan_id == vlan_id &&
2057 cm_node->loc_port == loc_port && cm_node->rem_port == rem_port &&
2058 !memcmp(cm_node->loc_addr, loc_addr, sizeof(cm_node->loc_addr)) &&
2059 !memcmp(cm_node->rem_addr, rem_addr, sizeof(cm_node->rem_addr))) {
2060 if (!refcount_inc_not_zero(&cm_node->refcnt))
2061 goto exit;
2062 rcu_read_unlock();
2063 trace_irdma_find_node(cm_node, 0, NULL);
2064 return cm_node;
2065 }
2066 }
2067
2068 exit:
2069 rcu_read_unlock();
2070
2071 /* no owner node */
2072 return NULL;
2073 }
2074
2075 /**
2076 * irdma_add_hte_node - add a cm node to the hash table
2077 * @cm_core: cm's core
2078 * @cm_node: connection's node
2079 */
irdma_add_hte_node(struct irdma_cm_core * cm_core,struct irdma_cm_node * cm_node)2080 static void irdma_add_hte_node(struct irdma_cm_core *cm_core,
2081 struct irdma_cm_node *cm_node)
2082 {
2083 unsigned long flags;
2084 u32 key = (cm_node->rem_port << 16) | cm_node->loc_port;
2085
2086 spin_lock_irqsave(&cm_core->ht_lock, flags);
2087 hash_add_rcu(cm_core->cm_hash_tbl, &cm_node->list, key);
2088 spin_unlock_irqrestore(&cm_core->ht_lock, flags);
2089 }
2090
2091 /**
2092 * irdma_ipv4_is_lpb - check if loopback
2093 * @loc_addr: local addr to compare
2094 * @rem_addr: remote address
2095 */
irdma_ipv4_is_lpb(u32 loc_addr,u32 rem_addr)2096 bool irdma_ipv4_is_lpb(u32 loc_addr, u32 rem_addr)
2097 {
2098 return ipv4_is_loopback(htonl(rem_addr)) || (loc_addr == rem_addr);
2099 }
2100
2101 /**
2102 * irdma_ipv6_is_lpb - check if loopback
2103 * @loc_addr: local addr to compare
2104 * @rem_addr: remote address
2105 */
irdma_ipv6_is_lpb(u32 * loc_addr,u32 * rem_addr)2106 bool irdma_ipv6_is_lpb(u32 *loc_addr, u32 *rem_addr)
2107 {
2108 struct in6_addr raddr6;
2109
2110 irdma_copy_ip_htonl(raddr6.in6_u.u6_addr32, rem_addr);
2111
2112 return !memcmp(loc_addr, rem_addr, 16) || ipv6_addr_loopback(&raddr6);
2113 }
2114
2115 /**
2116 * irdma_cm_create_ah - create a cm address handle
2117 * @cm_node: The connection manager node to create AH for
2118 * @wait: Provides option to wait for ah creation or not
2119 */
irdma_cm_create_ah(struct irdma_cm_node * cm_node,bool wait)2120 static int irdma_cm_create_ah(struct irdma_cm_node *cm_node, bool wait)
2121 {
2122 struct irdma_ah_info ah_info = {};
2123 struct irdma_device *iwdev = cm_node->iwdev;
2124
2125 ether_addr_copy(ah_info.mac_addr, iwdev->netdev->dev_addr);
2126
2127 ah_info.hop_ttl = 0x40;
2128 ah_info.tc_tos = cm_node->tos;
2129 ah_info.vsi = &iwdev->vsi;
2130
2131 if (cm_node->ipv4) {
2132 ah_info.ipv4_valid = true;
2133 ah_info.dest_ip_addr[0] = cm_node->rem_addr[0];
2134 ah_info.src_ip_addr[0] = cm_node->loc_addr[0];
2135 ah_info.do_lpbk = irdma_ipv4_is_lpb(ah_info.src_ip_addr[0],
2136 ah_info.dest_ip_addr[0]);
2137 } else {
2138 memcpy(ah_info.dest_ip_addr, cm_node->rem_addr,
2139 sizeof(ah_info.dest_ip_addr));
2140 memcpy(ah_info.src_ip_addr, cm_node->loc_addr,
2141 sizeof(ah_info.src_ip_addr));
2142 ah_info.do_lpbk = irdma_ipv6_is_lpb(ah_info.src_ip_addr,
2143 ah_info.dest_ip_addr);
2144 }
2145
2146 ah_info.vlan_tag = cm_node->vlan_id;
2147 if (cm_node->vlan_id < VLAN_N_VID) {
2148 ah_info.insert_vlan_tag = 1;
2149 ah_info.vlan_tag |= cm_node->user_pri << VLAN_PRIO_SHIFT;
2150 }
2151
2152 ah_info.dst_arpindex =
2153 irdma_arp_table(iwdev->rf, ah_info.dest_ip_addr,
2154 ah_info.ipv4_valid, NULL, IRDMA_ARP_RESOLVE);
2155
2156 if (irdma_puda_create_ah(&iwdev->rf->sc_dev, &ah_info, wait,
2157 IRDMA_PUDA_RSRC_TYPE_ILQ, cm_node,
2158 &cm_node->ah))
2159 return -ENOMEM;
2160
2161 trace_irdma_create_ah(cm_node);
2162 return 0;
2163 }
2164
2165 /**
2166 * irdma_cm_free_ah - free a cm address handle
2167 * @cm_node: The connection manager node to create AH for
2168 */
irdma_cm_free_ah(struct irdma_cm_node * cm_node)2169 static void irdma_cm_free_ah(struct irdma_cm_node *cm_node)
2170 {
2171 struct irdma_device *iwdev = cm_node->iwdev;
2172
2173 trace_irdma_cm_free_ah(cm_node);
2174 irdma_puda_free_ah(&iwdev->rf->sc_dev, cm_node->ah);
2175 cm_node->ah = NULL;
2176 }
2177
2178 /**
2179 * irdma_make_cm_node - create a new instance of a cm node
2180 * @cm_core: cm's core
2181 * @iwdev: iwarp device structure
2182 * @cm_info: quad info for connection
2183 * @listener: passive connection's listener
2184 */
2185 static struct irdma_cm_node *
irdma_make_cm_node(struct irdma_cm_core * cm_core,struct irdma_device * iwdev,struct irdma_cm_info * cm_info,struct irdma_cm_listener * listener)2186 irdma_make_cm_node(struct irdma_cm_core *cm_core, struct irdma_device *iwdev,
2187 struct irdma_cm_info *cm_info,
2188 struct irdma_cm_listener *listener)
2189 {
2190 struct irdma_cm_node *cm_node;
2191 int oldarpindex;
2192 int arpindex;
2193 struct net_device *netdev = iwdev->netdev;
2194
2195 /* create an hte and cm_node for this instance */
2196 cm_node = kzalloc(sizeof(*cm_node), GFP_ATOMIC);
2197 if (!cm_node)
2198 return NULL;
2199
2200 /* set our node specific transport info */
2201 cm_node->ipv4 = cm_info->ipv4;
2202 cm_node->vlan_id = cm_info->vlan_id;
2203 if (cm_node->vlan_id >= VLAN_N_VID && iwdev->dcb_vlan_mode)
2204 cm_node->vlan_id = 0;
2205 cm_node->tos = cm_info->tos;
2206 cm_node->user_pri = cm_info->user_pri;
2207 if (listener) {
2208 if (listener->tos != cm_info->tos)
2209 ibdev_warn(&iwdev->ibdev,
2210 "application TOS[%d] and remote client TOS[%d] mismatch\n",
2211 listener->tos, cm_info->tos);
2212 if (iwdev->vsi.dscp_mode) {
2213 cm_node->user_pri = listener->user_pri;
2214 } else {
2215 cm_node->tos = max(listener->tos, cm_info->tos);
2216 cm_node->user_pri = rt_tos2priority(cm_node->tos);
2217 }
2218 ibdev_dbg(&iwdev->ibdev,
2219 "DCB: listener: TOS:[%d] UP:[%d]\n", cm_node->tos,
2220 cm_node->user_pri);
2221 trace_irdma_listener_tos(iwdev, cm_node->tos,
2222 cm_node->user_pri);
2223 }
2224 memcpy(cm_node->loc_addr, cm_info->loc_addr, sizeof(cm_node->loc_addr));
2225 memcpy(cm_node->rem_addr, cm_info->rem_addr, sizeof(cm_node->rem_addr));
2226 cm_node->loc_port = cm_info->loc_port;
2227 cm_node->rem_port = cm_info->rem_port;
2228
2229 cm_node->mpa_frame_rev = IRDMA_CM_DEFAULT_MPA_VER;
2230 cm_node->send_rdma0_op = SEND_RDMA_READ_ZERO;
2231 cm_node->iwdev = iwdev;
2232 cm_node->dev = &iwdev->rf->sc_dev;
2233
2234 cm_node->ird_size = cm_node->dev->hw_attrs.max_hw_ird;
2235 cm_node->ord_size = cm_node->dev->hw_attrs.max_hw_ord;
2236
2237 cm_node->listener = listener;
2238 cm_node->cm_id = cm_info->cm_id;
2239 ether_addr_copy(cm_node->loc_mac, netdev->dev_addr);
2240 spin_lock_init(&cm_node->retrans_list_lock);
2241 cm_node->ack_rcvd = false;
2242
2243 init_completion(&cm_node->establish_comp);
2244 refcount_set(&cm_node->refcnt, 1);
2245 /* associate our parent CM core */
2246 cm_node->cm_core = cm_core;
2247 cm_node->tcp_cntxt.loc_id = IRDMA_CM_DEFAULT_LOCAL_ID;
2248 cm_node->tcp_cntxt.rcv_wscale = iwdev->rcv_wscale;
2249 cm_node->tcp_cntxt.rcv_wnd = iwdev->rcv_wnd >> cm_node->tcp_cntxt.rcv_wscale;
2250 if (cm_node->ipv4) {
2251 cm_node->tcp_cntxt.loc_seq_num = secure_tcp_seq(htonl(cm_node->loc_addr[0]),
2252 htonl(cm_node->rem_addr[0]),
2253 htons(cm_node->loc_port),
2254 htons(cm_node->rem_port));
2255 cm_node->tcp_cntxt.mss = iwdev->vsi.mtu - IRDMA_MTU_TO_MSS_IPV4;
2256 } else if (IS_ENABLED(CONFIG_IPV6)) {
2257 __be32 loc[4] = {
2258 htonl(cm_node->loc_addr[0]), htonl(cm_node->loc_addr[1]),
2259 htonl(cm_node->loc_addr[2]), htonl(cm_node->loc_addr[3])
2260 };
2261 __be32 rem[4] = {
2262 htonl(cm_node->rem_addr[0]), htonl(cm_node->rem_addr[1]),
2263 htonl(cm_node->rem_addr[2]), htonl(cm_node->rem_addr[3])
2264 };
2265 cm_node->tcp_cntxt.loc_seq_num = secure_tcpv6_seq(loc, rem,
2266 htons(cm_node->loc_port),
2267 htons(cm_node->rem_port));
2268 cm_node->tcp_cntxt.mss = iwdev->vsi.mtu - IRDMA_MTU_TO_MSS_IPV6;
2269 }
2270
2271 if ((cm_node->ipv4 &&
2272 irdma_ipv4_is_lpb(cm_node->loc_addr[0], cm_node->rem_addr[0])) ||
2273 (!cm_node->ipv4 &&
2274 irdma_ipv6_is_lpb(cm_node->loc_addr, cm_node->rem_addr))) {
2275 cm_node->do_lpb = true;
2276 arpindex = irdma_arp_table(iwdev->rf, cm_node->rem_addr,
2277 cm_node->ipv4, NULL,
2278 IRDMA_ARP_RESOLVE);
2279 } else {
2280 oldarpindex = irdma_arp_table(iwdev->rf, cm_node->rem_addr,
2281 cm_node->ipv4, NULL,
2282 IRDMA_ARP_RESOLVE);
2283 if (cm_node->ipv4)
2284 arpindex = irdma_addr_resolve_neigh(iwdev,
2285 cm_info->loc_addr[0],
2286 cm_info->rem_addr[0],
2287 oldarpindex);
2288 else if (IS_ENABLED(CONFIG_IPV6))
2289 arpindex = irdma_addr_resolve_neigh_ipv6(iwdev,
2290 cm_info->loc_addr,
2291 cm_info->rem_addr,
2292 oldarpindex);
2293 else
2294 arpindex = -EINVAL;
2295 }
2296
2297 if (arpindex < 0)
2298 goto err;
2299
2300 ether_addr_copy(cm_node->rem_mac,
2301 iwdev->rf->arp_table[arpindex].mac_addr);
2302 irdma_add_hte_node(cm_core, cm_node);
2303 cm_core->stats_nodes_created++;
2304 return cm_node;
2305
2306 err:
2307 kfree(cm_node);
2308
2309 return NULL;
2310 }
2311
irdma_destroy_connection(struct irdma_cm_node * cm_node)2312 static void irdma_destroy_connection(struct irdma_cm_node *cm_node)
2313 {
2314 struct irdma_cm_core *cm_core = cm_node->cm_core;
2315 struct irdma_qp *iwqp;
2316 struct irdma_cm_info nfo;
2317
2318 /* if the node is destroyed before connection was accelerated */
2319 if (!cm_node->accelerated && cm_node->accept_pend) {
2320 ibdev_dbg(&cm_node->iwdev->ibdev,
2321 "CM: node destroyed before established\n");
2322 atomic_dec(&cm_node->listener->pend_accepts_cnt);
2323 }
2324 if (cm_node->close_entry)
2325 irdma_handle_close_entry(cm_node, 0);
2326 if (cm_node->listener) {
2327 irdma_dec_refcnt_listen(cm_core, cm_node->listener, 0, true);
2328 } else {
2329 if (cm_node->apbvt_set) {
2330 irdma_del_apbvt(cm_node->iwdev, cm_node->apbvt_entry);
2331 cm_node->apbvt_set = 0;
2332 }
2333 irdma_get_addr_info(cm_node, &nfo);
2334 if (cm_node->qhash_set) {
2335 nfo.qh_qpid = cm_node->iwdev->vsi.ilq->qp_id;
2336 irdma_manage_qhash(cm_node->iwdev, &nfo,
2337 IRDMA_QHASH_TYPE_TCP_ESTABLISHED,
2338 IRDMA_QHASH_MANAGE_TYPE_DELETE, NULL,
2339 false);
2340 cm_node->qhash_set = 0;
2341 }
2342 }
2343
2344 iwqp = cm_node->iwqp;
2345 if (iwqp) {
2346 cm_node->cm_id->rem_ref(cm_node->cm_id);
2347 cm_node->cm_id = NULL;
2348 iwqp->cm_id = NULL;
2349 irdma_qp_rem_ref(&iwqp->ibqp);
2350 cm_node->iwqp = NULL;
2351 } else if (cm_node->qhash_set) {
2352 irdma_get_addr_info(cm_node, &nfo);
2353 nfo.qh_qpid = cm_node->iwdev->vsi.ilq->qp_id;
2354 irdma_manage_qhash(cm_node->iwdev, &nfo,
2355 IRDMA_QHASH_TYPE_TCP_ESTABLISHED,
2356 IRDMA_QHASH_MANAGE_TYPE_DELETE, NULL, false);
2357 cm_node->qhash_set = 0;
2358 }
2359
2360 cm_core->cm_free_ah(cm_node);
2361 }
2362
2363 /**
2364 * irdma_rem_ref_cm_node - destroy an instance of a cm node
2365 * @cm_node: connection's node
2366 */
irdma_rem_ref_cm_node(struct irdma_cm_node * cm_node)2367 void irdma_rem_ref_cm_node(struct irdma_cm_node *cm_node)
2368 {
2369 struct irdma_cm_core *cm_core = cm_node->cm_core;
2370 unsigned long flags;
2371
2372 trace_irdma_rem_ref_cm_node(cm_node, 0, __builtin_return_address(0));
2373 spin_lock_irqsave(&cm_core->ht_lock, flags);
2374
2375 if (!refcount_dec_and_test(&cm_node->refcnt)) {
2376 spin_unlock_irqrestore(&cm_core->ht_lock, flags);
2377 return;
2378 }
2379 if (cm_node->iwqp) {
2380 cm_node->iwqp->cm_node = NULL;
2381 cm_node->iwqp->cm_id = NULL;
2382 }
2383 hash_del_rcu(&cm_node->list);
2384 cm_node->cm_core->stats_nodes_destroyed++;
2385
2386 spin_unlock_irqrestore(&cm_core->ht_lock, flags);
2387
2388 irdma_destroy_connection(cm_node);
2389
2390 kfree_rcu(cm_node, rcu_head);
2391 }
2392
2393 /**
2394 * irdma_handle_fin_pkt - FIN packet received
2395 * @cm_node: connection's node
2396 */
irdma_handle_fin_pkt(struct irdma_cm_node * cm_node)2397 static void irdma_handle_fin_pkt(struct irdma_cm_node *cm_node)
2398 {
2399 switch (cm_node->state) {
2400 case IRDMA_CM_STATE_SYN_RCVD:
2401 case IRDMA_CM_STATE_SYN_SENT:
2402 case IRDMA_CM_STATE_ESTABLISHED:
2403 case IRDMA_CM_STATE_MPAREJ_RCVD:
2404 cm_node->tcp_cntxt.rcv_nxt++;
2405 irdma_cleanup_retrans_entry(cm_node);
2406 cm_node->state = IRDMA_CM_STATE_LAST_ACK;
2407 irdma_send_fin(cm_node);
2408 break;
2409 case IRDMA_CM_STATE_MPAREQ_SENT:
2410 irdma_create_event(cm_node, IRDMA_CM_EVENT_ABORTED);
2411 cm_node->tcp_cntxt.rcv_nxt++;
2412 irdma_cleanup_retrans_entry(cm_node);
2413 cm_node->state = IRDMA_CM_STATE_CLOSED;
2414 refcount_inc(&cm_node->refcnt);
2415 irdma_send_reset(cm_node);
2416 break;
2417 case IRDMA_CM_STATE_FIN_WAIT1:
2418 cm_node->tcp_cntxt.rcv_nxt++;
2419 irdma_cleanup_retrans_entry(cm_node);
2420 cm_node->state = IRDMA_CM_STATE_CLOSING;
2421 irdma_send_ack(cm_node);
2422 /*
2423 * Wait for ACK as this is simultaneous close.
2424 * After we receive ACK, do not send anything.
2425 * Just rm the node.
2426 */
2427 break;
2428 case IRDMA_CM_STATE_FIN_WAIT2:
2429 cm_node->tcp_cntxt.rcv_nxt++;
2430 irdma_cleanup_retrans_entry(cm_node);
2431 cm_node->state = IRDMA_CM_STATE_TIME_WAIT;
2432 irdma_send_ack(cm_node);
2433 irdma_schedule_cm_timer(cm_node, NULL, IRDMA_TIMER_TYPE_CLOSE,
2434 1, 0);
2435 break;
2436 case IRDMA_CM_STATE_TIME_WAIT:
2437 cm_node->tcp_cntxt.rcv_nxt++;
2438 irdma_cleanup_retrans_entry(cm_node);
2439 cm_node->state = IRDMA_CM_STATE_CLOSED;
2440 irdma_rem_ref_cm_node(cm_node);
2441 break;
2442 case IRDMA_CM_STATE_OFFLOADED:
2443 default:
2444 ibdev_dbg(&cm_node->iwdev->ibdev,
2445 "CM: bad state node state = %d\n", cm_node->state);
2446 break;
2447 }
2448 }
2449
2450 /**
2451 * irdma_handle_rst_pkt - process received RST packet
2452 * @cm_node: connection's node
2453 * @rbuf: receive buffer
2454 */
irdma_handle_rst_pkt(struct irdma_cm_node * cm_node,struct irdma_puda_buf * rbuf)2455 static void irdma_handle_rst_pkt(struct irdma_cm_node *cm_node,
2456 struct irdma_puda_buf *rbuf)
2457 {
2458 ibdev_dbg(&cm_node->iwdev->ibdev,
2459 "CM: caller: %pS cm_node=%p state=%d rem_port=0x%04x loc_port=0x%04x rem_addr=%pI4 loc_addr=%pI4\n",
2460 __builtin_return_address(0), cm_node, cm_node->state,
2461 cm_node->rem_port, cm_node->loc_port, cm_node->rem_addr,
2462 cm_node->loc_addr);
2463
2464 irdma_cleanup_retrans_entry(cm_node);
2465 switch (cm_node->state) {
2466 case IRDMA_CM_STATE_SYN_SENT:
2467 case IRDMA_CM_STATE_MPAREQ_SENT:
2468 switch (cm_node->mpa_frame_rev) {
2469 case IETF_MPA_V2:
2470 /* Drop down to MPA_V1*/
2471 cm_node->mpa_frame_rev = IETF_MPA_V1;
2472 /* send a syn and goto syn sent state */
2473 cm_node->state = IRDMA_CM_STATE_SYN_SENT;
2474 if (irdma_send_syn(cm_node, 0))
2475 irdma_active_open_err(cm_node, false);
2476 break;
2477 case IETF_MPA_V1:
2478 default:
2479 irdma_active_open_err(cm_node, false);
2480 break;
2481 }
2482 break;
2483 case IRDMA_CM_STATE_MPAREQ_RCVD:
2484 atomic_inc(&cm_node->passive_state);
2485 break;
2486 case IRDMA_CM_STATE_ESTABLISHED:
2487 case IRDMA_CM_STATE_SYN_RCVD:
2488 case IRDMA_CM_STATE_LISTENING:
2489 irdma_passive_open_err(cm_node, false);
2490 break;
2491 case IRDMA_CM_STATE_OFFLOADED:
2492 irdma_active_open_err(cm_node, false);
2493 break;
2494 case IRDMA_CM_STATE_CLOSED:
2495 break;
2496 case IRDMA_CM_STATE_FIN_WAIT2:
2497 case IRDMA_CM_STATE_FIN_WAIT1:
2498 case IRDMA_CM_STATE_LAST_ACK:
2499 case IRDMA_CM_STATE_TIME_WAIT:
2500 cm_node->state = IRDMA_CM_STATE_CLOSED;
2501 irdma_rem_ref_cm_node(cm_node);
2502 break;
2503 default:
2504 break;
2505 }
2506 }
2507
2508 /**
2509 * irdma_handle_rcv_mpa - Process a recv'd mpa buffer
2510 * @cm_node: connection's node
2511 * @rbuf: receive buffer
2512 */
irdma_handle_rcv_mpa(struct irdma_cm_node * cm_node,struct irdma_puda_buf * rbuf)2513 static void irdma_handle_rcv_mpa(struct irdma_cm_node *cm_node,
2514 struct irdma_puda_buf *rbuf)
2515 {
2516 int err;
2517 int datasize = rbuf->datalen;
2518 u8 *dataloc = rbuf->data;
2519
2520 enum irdma_cm_event_type type = IRDMA_CM_EVENT_UNKNOWN;
2521 u32 res_type;
2522
2523 err = irdma_parse_mpa(cm_node, dataloc, &res_type, datasize);
2524 if (err) {
2525 if (cm_node->state == IRDMA_CM_STATE_MPAREQ_SENT)
2526 irdma_active_open_err(cm_node, true);
2527 else
2528 irdma_passive_open_err(cm_node, true);
2529 return;
2530 }
2531
2532 switch (cm_node->state) {
2533 case IRDMA_CM_STATE_ESTABLISHED:
2534 if (res_type == IRDMA_MPA_REQUEST_REJECT)
2535 ibdev_dbg(&cm_node->iwdev->ibdev,
2536 "CM: state for reject\n");
2537 cm_node->state = IRDMA_CM_STATE_MPAREQ_RCVD;
2538 type = IRDMA_CM_EVENT_MPA_REQ;
2539 irdma_send_ack(cm_node); /* ACK received MPA request */
2540 atomic_set(&cm_node->passive_state,
2541 IRDMA_PASSIVE_STATE_INDICATED);
2542 break;
2543 case IRDMA_CM_STATE_MPAREQ_SENT:
2544 irdma_cleanup_retrans_entry(cm_node);
2545 if (res_type == IRDMA_MPA_REQUEST_REJECT) {
2546 type = IRDMA_CM_EVENT_MPA_REJECT;
2547 cm_node->state = IRDMA_CM_STATE_MPAREJ_RCVD;
2548 } else {
2549 type = IRDMA_CM_EVENT_CONNECTED;
2550 cm_node->state = IRDMA_CM_STATE_OFFLOADED;
2551 }
2552 irdma_send_ack(cm_node);
2553 break;
2554 default:
2555 ibdev_dbg(&cm_node->iwdev->ibdev,
2556 "CM: wrong cm_node state =%d\n", cm_node->state);
2557 break;
2558 }
2559 irdma_create_event(cm_node, type);
2560 }
2561
2562 /**
2563 * irdma_check_syn - Check for error on received syn ack
2564 * @cm_node: connection's node
2565 * @tcph: pointer tcp header
2566 */
irdma_check_syn(struct irdma_cm_node * cm_node,struct tcphdr * tcph)2567 static int irdma_check_syn(struct irdma_cm_node *cm_node, struct tcphdr *tcph)
2568 {
2569 if (ntohl(tcph->ack_seq) != cm_node->tcp_cntxt.loc_seq_num) {
2570 irdma_active_open_err(cm_node, true);
2571 return 1;
2572 }
2573
2574 return 0;
2575 }
2576
2577 /**
2578 * irdma_check_seq - check seq numbers if OK
2579 * @cm_node: connection's node
2580 * @tcph: pointer tcp header
2581 */
irdma_check_seq(struct irdma_cm_node * cm_node,struct tcphdr * tcph)2582 static int irdma_check_seq(struct irdma_cm_node *cm_node, struct tcphdr *tcph)
2583 {
2584 u32 seq;
2585 u32 ack_seq;
2586 u32 loc_seq_num = cm_node->tcp_cntxt.loc_seq_num;
2587 u32 rcv_nxt = cm_node->tcp_cntxt.rcv_nxt;
2588 u32 rcv_wnd;
2589 int err = 0;
2590
2591 seq = ntohl(tcph->seq);
2592 ack_seq = ntohl(tcph->ack_seq);
2593 rcv_wnd = cm_node->tcp_cntxt.rcv_wnd;
2594 if (ack_seq != loc_seq_num ||
2595 !between(seq, rcv_nxt, (rcv_nxt + rcv_wnd)))
2596 err = -1;
2597 if (err)
2598 ibdev_dbg(&cm_node->iwdev->ibdev,
2599 "CM: seq number err\n");
2600
2601 return err;
2602 }
2603
irdma_add_conn_est_qh(struct irdma_cm_node * cm_node)2604 void irdma_add_conn_est_qh(struct irdma_cm_node *cm_node)
2605 {
2606 struct irdma_cm_info nfo;
2607
2608 irdma_get_addr_info(cm_node, &nfo);
2609 nfo.qh_qpid = cm_node->iwdev->vsi.ilq->qp_id;
2610 irdma_manage_qhash(cm_node->iwdev, &nfo,
2611 IRDMA_QHASH_TYPE_TCP_ESTABLISHED,
2612 IRDMA_QHASH_MANAGE_TYPE_ADD,
2613 cm_node, false);
2614 cm_node->qhash_set = true;
2615 }
2616
2617 /**
2618 * irdma_handle_syn_pkt - is for Passive node
2619 * @cm_node: connection's node
2620 * @rbuf: receive buffer
2621 */
irdma_handle_syn_pkt(struct irdma_cm_node * cm_node,struct irdma_puda_buf * rbuf)2622 static void irdma_handle_syn_pkt(struct irdma_cm_node *cm_node,
2623 struct irdma_puda_buf *rbuf)
2624 {
2625 struct tcphdr *tcph = (struct tcphdr *)rbuf->tcph;
2626 int err;
2627 u32 inc_sequence;
2628 int optionsize;
2629
2630 optionsize = (tcph->doff << 2) - sizeof(struct tcphdr);
2631 inc_sequence = ntohl(tcph->seq);
2632
2633 switch (cm_node->state) {
2634 case IRDMA_CM_STATE_SYN_SENT:
2635 case IRDMA_CM_STATE_MPAREQ_SENT:
2636 /* Rcvd syn on active open connection */
2637 irdma_active_open_err(cm_node, 1);
2638 break;
2639 case IRDMA_CM_STATE_LISTENING:
2640 /* Passive OPEN */
2641 if (atomic_read(&cm_node->listener->pend_accepts_cnt) >
2642 cm_node->listener->backlog) {
2643 cm_node->cm_core->stats_backlog_drops++;
2644 irdma_passive_open_err(cm_node, false);
2645 break;
2646 }
2647 err = irdma_handle_tcp_options(cm_node, tcph, optionsize, 1);
2648 if (err) {
2649 irdma_passive_open_err(cm_node, false);
2650 /* drop pkt */
2651 break;
2652 }
2653 err = cm_node->cm_core->cm_create_ah(cm_node, false);
2654 if (err) {
2655 irdma_passive_open_err(cm_node, false);
2656 /* drop pkt */
2657 break;
2658 }
2659 cm_node->tcp_cntxt.rcv_nxt = inc_sequence + 1;
2660 cm_node->accept_pend = 1;
2661 atomic_inc(&cm_node->listener->pend_accepts_cnt);
2662
2663 cm_node->state = IRDMA_CM_STATE_SYN_RCVD;
2664 break;
2665 case IRDMA_CM_STATE_CLOSED:
2666 irdma_cleanup_retrans_entry(cm_node);
2667 refcount_inc(&cm_node->refcnt);
2668 irdma_send_reset(cm_node);
2669 break;
2670 case IRDMA_CM_STATE_OFFLOADED:
2671 case IRDMA_CM_STATE_ESTABLISHED:
2672 case IRDMA_CM_STATE_FIN_WAIT1:
2673 case IRDMA_CM_STATE_FIN_WAIT2:
2674 case IRDMA_CM_STATE_MPAREQ_RCVD:
2675 case IRDMA_CM_STATE_LAST_ACK:
2676 case IRDMA_CM_STATE_CLOSING:
2677 case IRDMA_CM_STATE_UNKNOWN:
2678 default:
2679 break;
2680 }
2681 }
2682
2683 /**
2684 * irdma_handle_synack_pkt - Process SYN+ACK packet (active side)
2685 * @cm_node: connection's node
2686 * @rbuf: receive buffer
2687 */
irdma_handle_synack_pkt(struct irdma_cm_node * cm_node,struct irdma_puda_buf * rbuf)2688 static void irdma_handle_synack_pkt(struct irdma_cm_node *cm_node,
2689 struct irdma_puda_buf *rbuf)
2690 {
2691 struct tcphdr *tcph = (struct tcphdr *)rbuf->tcph;
2692 int err;
2693 u32 inc_sequence;
2694 int optionsize;
2695
2696 optionsize = (tcph->doff << 2) - sizeof(struct tcphdr);
2697 inc_sequence = ntohl(tcph->seq);
2698 switch (cm_node->state) {
2699 case IRDMA_CM_STATE_SYN_SENT:
2700 irdma_cleanup_retrans_entry(cm_node);
2701 /* active open */
2702 if (irdma_check_syn(cm_node, tcph)) {
2703 ibdev_dbg(&cm_node->iwdev->ibdev,
2704 "CM: check syn fail\n");
2705 return;
2706 }
2707 cm_node->tcp_cntxt.rem_ack_num = ntohl(tcph->ack_seq);
2708 /* setup options */
2709 err = irdma_handle_tcp_options(cm_node, tcph, optionsize, 0);
2710 if (err) {
2711 ibdev_dbg(&cm_node->iwdev->ibdev,
2712 "CM: cm_node=%p tcp_options failed\n",
2713 cm_node);
2714 break;
2715 }
2716 irdma_cleanup_retrans_entry(cm_node);
2717 cm_node->tcp_cntxt.rcv_nxt = inc_sequence + 1;
2718 irdma_send_ack(cm_node); /* ACK for the syn_ack */
2719 err = irdma_send_mpa_request(cm_node);
2720 if (err) {
2721 ibdev_dbg(&cm_node->iwdev->ibdev,
2722 "CM: cm_node=%p irdma_send_mpa_request failed\n",
2723 cm_node);
2724 break;
2725 }
2726 cm_node->state = IRDMA_CM_STATE_MPAREQ_SENT;
2727 break;
2728 case IRDMA_CM_STATE_MPAREQ_RCVD:
2729 irdma_passive_open_err(cm_node, true);
2730 break;
2731 case IRDMA_CM_STATE_LISTENING:
2732 cm_node->tcp_cntxt.loc_seq_num = ntohl(tcph->ack_seq);
2733 irdma_cleanup_retrans_entry(cm_node);
2734 cm_node->state = IRDMA_CM_STATE_CLOSED;
2735 irdma_send_reset(cm_node);
2736 break;
2737 case IRDMA_CM_STATE_CLOSED:
2738 cm_node->tcp_cntxt.loc_seq_num = ntohl(tcph->ack_seq);
2739 irdma_cleanup_retrans_entry(cm_node);
2740 refcount_inc(&cm_node->refcnt);
2741 irdma_send_reset(cm_node);
2742 break;
2743 case IRDMA_CM_STATE_ESTABLISHED:
2744 case IRDMA_CM_STATE_FIN_WAIT1:
2745 case IRDMA_CM_STATE_FIN_WAIT2:
2746 case IRDMA_CM_STATE_LAST_ACK:
2747 case IRDMA_CM_STATE_OFFLOADED:
2748 case IRDMA_CM_STATE_CLOSING:
2749 case IRDMA_CM_STATE_UNKNOWN:
2750 case IRDMA_CM_STATE_MPAREQ_SENT:
2751 default:
2752 break;
2753 }
2754 }
2755
2756 /**
2757 * irdma_handle_ack_pkt - process packet with ACK
2758 * @cm_node: connection's node
2759 * @rbuf: receive buffer
2760 */
irdma_handle_ack_pkt(struct irdma_cm_node * cm_node,struct irdma_puda_buf * rbuf)2761 static int irdma_handle_ack_pkt(struct irdma_cm_node *cm_node,
2762 struct irdma_puda_buf *rbuf)
2763 {
2764 struct tcphdr *tcph = (struct tcphdr *)rbuf->tcph;
2765 u32 inc_sequence;
2766 int ret;
2767 int optionsize;
2768 u32 datasize = rbuf->datalen;
2769
2770 optionsize = (tcph->doff << 2) - sizeof(struct tcphdr);
2771
2772 if (irdma_check_seq(cm_node, tcph))
2773 return -EINVAL;
2774
2775 inc_sequence = ntohl(tcph->seq);
2776 switch (cm_node->state) {
2777 case IRDMA_CM_STATE_SYN_RCVD:
2778 irdma_cleanup_retrans_entry(cm_node);
2779 ret = irdma_handle_tcp_options(cm_node, tcph, optionsize, 1);
2780 if (ret)
2781 return ret;
2782 cm_node->tcp_cntxt.rem_ack_num = ntohl(tcph->ack_seq);
2783 cm_node->state = IRDMA_CM_STATE_ESTABLISHED;
2784 if (datasize) {
2785 cm_node->tcp_cntxt.rcv_nxt = inc_sequence + datasize;
2786 irdma_handle_rcv_mpa(cm_node, rbuf);
2787 }
2788 break;
2789 case IRDMA_CM_STATE_ESTABLISHED:
2790 irdma_cleanup_retrans_entry(cm_node);
2791 if (datasize) {
2792 cm_node->tcp_cntxt.rcv_nxt = inc_sequence + datasize;
2793 irdma_handle_rcv_mpa(cm_node, rbuf);
2794 }
2795 break;
2796 case IRDMA_CM_STATE_MPAREQ_SENT:
2797 cm_node->tcp_cntxt.rem_ack_num = ntohl(tcph->ack_seq);
2798 if (datasize) {
2799 cm_node->tcp_cntxt.rcv_nxt = inc_sequence + datasize;
2800 cm_node->ack_rcvd = false;
2801 irdma_handle_rcv_mpa(cm_node, rbuf);
2802 } else {
2803 cm_node->ack_rcvd = true;
2804 }
2805 break;
2806 case IRDMA_CM_STATE_LISTENING:
2807 irdma_cleanup_retrans_entry(cm_node);
2808 cm_node->state = IRDMA_CM_STATE_CLOSED;
2809 irdma_send_reset(cm_node);
2810 break;
2811 case IRDMA_CM_STATE_CLOSED:
2812 irdma_cleanup_retrans_entry(cm_node);
2813 refcount_inc(&cm_node->refcnt);
2814 irdma_send_reset(cm_node);
2815 break;
2816 case IRDMA_CM_STATE_LAST_ACK:
2817 case IRDMA_CM_STATE_CLOSING:
2818 irdma_cleanup_retrans_entry(cm_node);
2819 cm_node->state = IRDMA_CM_STATE_CLOSED;
2820 irdma_rem_ref_cm_node(cm_node);
2821 break;
2822 case IRDMA_CM_STATE_FIN_WAIT1:
2823 irdma_cleanup_retrans_entry(cm_node);
2824 cm_node->state = IRDMA_CM_STATE_FIN_WAIT2;
2825 break;
2826 case IRDMA_CM_STATE_SYN_SENT:
2827 case IRDMA_CM_STATE_FIN_WAIT2:
2828 case IRDMA_CM_STATE_OFFLOADED:
2829 case IRDMA_CM_STATE_MPAREQ_RCVD:
2830 case IRDMA_CM_STATE_UNKNOWN:
2831 default:
2832 irdma_cleanup_retrans_entry(cm_node);
2833 break;
2834 }
2835
2836 return 0;
2837 }
2838
2839 /**
2840 * irdma_process_pkt - process cm packet
2841 * @cm_node: connection's node
2842 * @rbuf: receive buffer
2843 */
irdma_process_pkt(struct irdma_cm_node * cm_node,struct irdma_puda_buf * rbuf)2844 static void irdma_process_pkt(struct irdma_cm_node *cm_node,
2845 struct irdma_puda_buf *rbuf)
2846 {
2847 enum irdma_tcpip_pkt_type pkt_type = IRDMA_PKT_TYPE_UNKNOWN;
2848 struct tcphdr *tcph = (struct tcphdr *)rbuf->tcph;
2849 u32 fin_set = 0;
2850 int err;
2851
2852 if (tcph->rst) {
2853 pkt_type = IRDMA_PKT_TYPE_RST;
2854 } else if (tcph->syn) {
2855 pkt_type = IRDMA_PKT_TYPE_SYN;
2856 if (tcph->ack)
2857 pkt_type = IRDMA_PKT_TYPE_SYNACK;
2858 } else if (tcph->ack) {
2859 pkt_type = IRDMA_PKT_TYPE_ACK;
2860 }
2861 if (tcph->fin)
2862 fin_set = 1;
2863
2864 switch (pkt_type) {
2865 case IRDMA_PKT_TYPE_SYN:
2866 irdma_handle_syn_pkt(cm_node, rbuf);
2867 break;
2868 case IRDMA_PKT_TYPE_SYNACK:
2869 irdma_handle_synack_pkt(cm_node, rbuf);
2870 break;
2871 case IRDMA_PKT_TYPE_ACK:
2872 err = irdma_handle_ack_pkt(cm_node, rbuf);
2873 if (fin_set && !err)
2874 irdma_handle_fin_pkt(cm_node);
2875 break;
2876 case IRDMA_PKT_TYPE_RST:
2877 irdma_handle_rst_pkt(cm_node, rbuf);
2878 break;
2879 default:
2880 if (fin_set &&
2881 (!irdma_check_seq(cm_node, (struct tcphdr *)rbuf->tcph)))
2882 irdma_handle_fin_pkt(cm_node);
2883 break;
2884 }
2885 }
2886
2887 /**
2888 * irdma_make_listen_node - create a listen node with params
2889 * @cm_core: cm's core
2890 * @iwdev: iwarp device structure
2891 * @cm_info: quad info for connection
2892 */
2893 static struct irdma_cm_listener *
irdma_make_listen_node(struct irdma_cm_core * cm_core,struct irdma_device * iwdev,struct irdma_cm_info * cm_info)2894 irdma_make_listen_node(struct irdma_cm_core *cm_core,
2895 struct irdma_device *iwdev,
2896 struct irdma_cm_info *cm_info)
2897 {
2898 struct irdma_cm_listener *listener;
2899 unsigned long flags;
2900
2901 /* cannot have multiple matching listeners */
2902 listener = irdma_find_listener(cm_core, cm_info->loc_addr,
2903 cm_info->loc_port, cm_info->vlan_id,
2904 IRDMA_CM_LISTENER_EITHER_STATE);
2905 if (listener &&
2906 listener->listener_state == IRDMA_CM_LISTENER_ACTIVE_STATE) {
2907 refcount_dec(&listener->refcnt);
2908 return NULL;
2909 }
2910
2911 if (!listener) {
2912 /* create a CM listen node
2913 * 1/2 node to compare incoming traffic to
2914 */
2915 listener = kzalloc(sizeof(*listener), GFP_KERNEL);
2916 if (!listener)
2917 return NULL;
2918 cm_core->stats_listen_nodes_created++;
2919 memcpy(listener->loc_addr, cm_info->loc_addr,
2920 sizeof(listener->loc_addr));
2921 listener->loc_port = cm_info->loc_port;
2922
2923 INIT_LIST_HEAD(&listener->child_listen_list);
2924
2925 refcount_set(&listener->refcnt, 1);
2926 } else {
2927 listener->reused_node = 1;
2928 }
2929
2930 listener->cm_id = cm_info->cm_id;
2931 listener->ipv4 = cm_info->ipv4;
2932 listener->vlan_id = cm_info->vlan_id;
2933 atomic_set(&listener->pend_accepts_cnt, 0);
2934 listener->cm_core = cm_core;
2935 listener->iwdev = iwdev;
2936
2937 listener->backlog = cm_info->backlog;
2938 listener->listener_state = IRDMA_CM_LISTENER_ACTIVE_STATE;
2939
2940 if (!listener->reused_node) {
2941 spin_lock_irqsave(&cm_core->listen_list_lock, flags);
2942 list_add(&listener->list, &cm_core->listen_list);
2943 spin_unlock_irqrestore(&cm_core->listen_list_lock, flags);
2944 }
2945
2946 return listener;
2947 }
2948
2949 /**
2950 * irdma_create_cm_node - make a connection node with params
2951 * @cm_core: cm's core
2952 * @iwdev: iwarp device structure
2953 * @conn_param: connection parameters
2954 * @cm_info: quad info for connection
2955 * @caller_cm_node: pointer to cm_node structure to return
2956 */
irdma_create_cm_node(struct irdma_cm_core * cm_core,struct irdma_device * iwdev,struct iw_cm_conn_param * conn_param,struct irdma_cm_info * cm_info,struct irdma_cm_node ** caller_cm_node)2957 static int irdma_create_cm_node(struct irdma_cm_core *cm_core,
2958 struct irdma_device *iwdev,
2959 struct iw_cm_conn_param *conn_param,
2960 struct irdma_cm_info *cm_info,
2961 struct irdma_cm_node **caller_cm_node)
2962 {
2963 struct irdma_cm_node *cm_node;
2964 u16 private_data_len = conn_param->private_data_len;
2965 const void *private_data = conn_param->private_data;
2966
2967 /* create a CM connection node */
2968 cm_node = irdma_make_cm_node(cm_core, iwdev, cm_info, NULL);
2969 if (!cm_node)
2970 return -ENOMEM;
2971
2972 /* set our node side to client (active) side */
2973 cm_node->tcp_cntxt.client = 1;
2974 cm_node->tcp_cntxt.rcv_wscale = IRDMA_CM_DEFAULT_RCV_WND_SCALE;
2975
2976 irdma_record_ird_ord(cm_node, conn_param->ird, conn_param->ord);
2977
2978 cm_node->pdata.size = private_data_len;
2979 cm_node->pdata.addr = cm_node->pdata_buf;
2980
2981 memcpy(cm_node->pdata_buf, private_data, private_data_len);
2982 *caller_cm_node = cm_node;
2983
2984 return 0;
2985 }
2986
2987 /**
2988 * irdma_cm_reject - reject and teardown a connection
2989 * @cm_node: connection's node
2990 * @pdata: ptr to private data for reject
2991 * @plen: size of private data
2992 */
irdma_cm_reject(struct irdma_cm_node * cm_node,const void * pdata,u8 plen)2993 static int irdma_cm_reject(struct irdma_cm_node *cm_node, const void *pdata,
2994 u8 plen)
2995 {
2996 int ret;
2997 int passive_state;
2998
2999 if (cm_node->tcp_cntxt.client)
3000 return 0;
3001
3002 irdma_cleanup_retrans_entry(cm_node);
3003
3004 passive_state = atomic_add_return(1, &cm_node->passive_state);
3005 if (passive_state == IRDMA_SEND_RESET_EVENT) {
3006 cm_node->state = IRDMA_CM_STATE_CLOSED;
3007 irdma_rem_ref_cm_node(cm_node);
3008 return 0;
3009 }
3010
3011 if (cm_node->state == IRDMA_CM_STATE_LISTENER_DESTROYED) {
3012 irdma_rem_ref_cm_node(cm_node);
3013 return 0;
3014 }
3015
3016 ret = irdma_send_mpa_reject(cm_node, pdata, plen);
3017 if (!ret)
3018 return 0;
3019
3020 cm_node->state = IRDMA_CM_STATE_CLOSED;
3021 if (irdma_send_reset(cm_node))
3022 ibdev_dbg(&cm_node->iwdev->ibdev,
3023 "CM: send reset failed\n");
3024
3025 return ret;
3026 }
3027
3028 /**
3029 * irdma_cm_close - close of cm connection
3030 * @cm_node: connection's node
3031 */
irdma_cm_close(struct irdma_cm_node * cm_node)3032 static int irdma_cm_close(struct irdma_cm_node *cm_node)
3033 {
3034 switch (cm_node->state) {
3035 case IRDMA_CM_STATE_SYN_RCVD:
3036 case IRDMA_CM_STATE_SYN_SENT:
3037 case IRDMA_CM_STATE_ONE_SIDE_ESTABLISHED:
3038 case IRDMA_CM_STATE_ESTABLISHED:
3039 case IRDMA_CM_STATE_ACCEPTING:
3040 case IRDMA_CM_STATE_MPAREQ_SENT:
3041 case IRDMA_CM_STATE_MPAREQ_RCVD:
3042 irdma_cleanup_retrans_entry(cm_node);
3043 irdma_send_reset(cm_node);
3044 break;
3045 case IRDMA_CM_STATE_CLOSE_WAIT:
3046 cm_node->state = IRDMA_CM_STATE_LAST_ACK;
3047 irdma_send_fin(cm_node);
3048 break;
3049 case IRDMA_CM_STATE_FIN_WAIT1:
3050 case IRDMA_CM_STATE_FIN_WAIT2:
3051 case IRDMA_CM_STATE_LAST_ACK:
3052 case IRDMA_CM_STATE_TIME_WAIT:
3053 case IRDMA_CM_STATE_CLOSING:
3054 return -EINVAL;
3055 case IRDMA_CM_STATE_LISTENING:
3056 irdma_cleanup_retrans_entry(cm_node);
3057 irdma_send_reset(cm_node);
3058 break;
3059 case IRDMA_CM_STATE_MPAREJ_RCVD:
3060 case IRDMA_CM_STATE_UNKNOWN:
3061 case IRDMA_CM_STATE_INITED:
3062 case IRDMA_CM_STATE_CLOSED:
3063 case IRDMA_CM_STATE_LISTENER_DESTROYED:
3064 irdma_rem_ref_cm_node(cm_node);
3065 break;
3066 case IRDMA_CM_STATE_OFFLOADED:
3067 if (cm_node->send_entry)
3068 ibdev_dbg(&cm_node->iwdev->ibdev,
3069 "CM: CM send_entry in OFFLOADED state\n");
3070 irdma_rem_ref_cm_node(cm_node);
3071 break;
3072 }
3073
3074 return 0;
3075 }
3076
3077 /**
3078 * irdma_receive_ilq - recv an ETHERNET packet, and process it
3079 * through CM
3080 * @vsi: VSI structure of dev
3081 * @rbuf: receive buffer
3082 */
irdma_receive_ilq(struct irdma_sc_vsi * vsi,struct irdma_puda_buf * rbuf)3083 void irdma_receive_ilq(struct irdma_sc_vsi *vsi, struct irdma_puda_buf *rbuf)
3084 {
3085 struct irdma_cm_node *cm_node;
3086 struct irdma_cm_listener *listener;
3087 struct iphdr *iph;
3088 struct ipv6hdr *ip6h;
3089 struct tcphdr *tcph;
3090 struct irdma_cm_info cm_info = {};
3091 struct irdma_device *iwdev = vsi->back_vsi;
3092 struct irdma_cm_core *cm_core = &iwdev->cm_core;
3093 struct vlan_ethhdr *ethh;
3094 u16 vtag;
3095
3096 /* if vlan, then maclen = 18 else 14 */
3097 iph = (struct iphdr *)rbuf->iph;
3098 print_hex_dump_debug("ILQ: RECEIVE ILQ BUFFER", DUMP_PREFIX_OFFSET,
3099 16, 8, rbuf->mem.va, rbuf->totallen, false);
3100 if (iwdev->rf->sc_dev.hw_attrs.uk_attrs.hw_rev >= IRDMA_GEN_2) {
3101 if (rbuf->vlan_valid) {
3102 vtag = rbuf->vlan_id;
3103 cm_info.user_pri = (vtag & VLAN_PRIO_MASK) >>
3104 VLAN_PRIO_SHIFT;
3105 cm_info.vlan_id = vtag & VLAN_VID_MASK;
3106 } else {
3107 cm_info.vlan_id = 0xFFFF;
3108 }
3109 } else {
3110 ethh = rbuf->mem.va;
3111
3112 if (ethh->h_vlan_proto == htons(ETH_P_8021Q)) {
3113 vtag = ntohs(ethh->h_vlan_TCI);
3114 cm_info.user_pri = (vtag & VLAN_PRIO_MASK) >>
3115 VLAN_PRIO_SHIFT;
3116 cm_info.vlan_id = vtag & VLAN_VID_MASK;
3117 ibdev_dbg(&cm_core->iwdev->ibdev,
3118 "CM: vlan_id=%d\n", cm_info.vlan_id);
3119 } else {
3120 cm_info.vlan_id = 0xFFFF;
3121 }
3122 }
3123 tcph = (struct tcphdr *)rbuf->tcph;
3124
3125 if (rbuf->ipv4) {
3126 cm_info.loc_addr[0] = ntohl(iph->daddr);
3127 cm_info.rem_addr[0] = ntohl(iph->saddr);
3128 cm_info.ipv4 = true;
3129 cm_info.tos = iph->tos;
3130 } else {
3131 ip6h = (struct ipv6hdr *)rbuf->iph;
3132 irdma_copy_ip_ntohl(cm_info.loc_addr,
3133 ip6h->daddr.in6_u.u6_addr32);
3134 irdma_copy_ip_ntohl(cm_info.rem_addr,
3135 ip6h->saddr.in6_u.u6_addr32);
3136 cm_info.ipv4 = false;
3137 cm_info.tos = (ip6h->priority << 4) | (ip6h->flow_lbl[0] >> 4);
3138 }
3139 cm_info.loc_port = ntohs(tcph->dest);
3140 cm_info.rem_port = ntohs(tcph->source);
3141 cm_node = irdma_find_node(cm_core, cm_info.rem_port, cm_info.rem_addr,
3142 cm_info.loc_port, cm_info.loc_addr, cm_info.vlan_id);
3143
3144 if (!cm_node) {
3145 /* Only type of packet accepted are for the
3146 * PASSIVE open (syn only)
3147 */
3148 if (!tcph->syn || tcph->ack)
3149 return;
3150
3151 listener = irdma_find_listener(cm_core,
3152 cm_info.loc_addr,
3153 cm_info.loc_port,
3154 cm_info.vlan_id,
3155 IRDMA_CM_LISTENER_ACTIVE_STATE);
3156 if (!listener) {
3157 cm_info.cm_id = NULL;
3158 ibdev_dbg(&cm_core->iwdev->ibdev,
3159 "CM: no listener found\n");
3160 return;
3161 }
3162
3163 cm_info.cm_id = listener->cm_id;
3164 cm_node = irdma_make_cm_node(cm_core, iwdev, &cm_info,
3165 listener);
3166 if (!cm_node) {
3167 ibdev_dbg(&cm_core->iwdev->ibdev,
3168 "CM: allocate node failed\n");
3169 refcount_dec(&listener->refcnt);
3170 return;
3171 }
3172
3173 if (!tcph->rst && !tcph->fin) {
3174 cm_node->state = IRDMA_CM_STATE_LISTENING;
3175 } else {
3176 irdma_rem_ref_cm_node(cm_node);
3177 return;
3178 }
3179
3180 refcount_inc(&cm_node->refcnt);
3181 } else if (cm_node->state == IRDMA_CM_STATE_OFFLOADED) {
3182 irdma_rem_ref_cm_node(cm_node);
3183 return;
3184 }
3185
3186 irdma_process_pkt(cm_node, rbuf);
3187 irdma_rem_ref_cm_node(cm_node);
3188 }
3189
irdma_add_qh(struct irdma_cm_node * cm_node,bool active)3190 static int irdma_add_qh(struct irdma_cm_node *cm_node, bool active)
3191 {
3192 if (!active)
3193 irdma_add_conn_est_qh(cm_node);
3194 return 0;
3195 }
3196
irdma_cm_free_ah_nop(struct irdma_cm_node * cm_node)3197 static void irdma_cm_free_ah_nop(struct irdma_cm_node *cm_node)
3198 {
3199 }
3200
3201 /**
3202 * irdma_setup_cm_core - setup top level instance of a cm core
3203 * @iwdev: iwarp device structure
3204 * @rdma_ver: HW version
3205 */
irdma_setup_cm_core(struct irdma_device * iwdev,u8 rdma_ver)3206 int irdma_setup_cm_core(struct irdma_device *iwdev, u8 rdma_ver)
3207 {
3208 struct irdma_cm_core *cm_core = &iwdev->cm_core;
3209
3210 cm_core->iwdev = iwdev;
3211 cm_core->dev = &iwdev->rf->sc_dev;
3212
3213 /* Handles CM event work items send to Iwarp core */
3214 cm_core->event_wq = alloc_ordered_workqueue("iwarp-event-wq", 0);
3215 if (!cm_core->event_wq)
3216 return -ENOMEM;
3217
3218 INIT_LIST_HEAD(&cm_core->listen_list);
3219
3220 timer_setup(&cm_core->tcp_timer, irdma_cm_timer_tick, 0);
3221
3222 spin_lock_init(&cm_core->ht_lock);
3223 spin_lock_init(&cm_core->listen_list_lock);
3224 spin_lock_init(&cm_core->apbvt_lock);
3225 switch (rdma_ver) {
3226 case IRDMA_GEN_1:
3227 cm_core->form_cm_frame = irdma_form_uda_cm_frame;
3228 cm_core->cm_create_ah = irdma_add_qh;
3229 cm_core->cm_free_ah = irdma_cm_free_ah_nop;
3230 break;
3231 case IRDMA_GEN_2:
3232 default:
3233 cm_core->form_cm_frame = irdma_form_ah_cm_frame;
3234 cm_core->cm_create_ah = irdma_cm_create_ah;
3235 cm_core->cm_free_ah = irdma_cm_free_ah;
3236 }
3237
3238 return 0;
3239 }
3240
3241 /**
3242 * irdma_cleanup_cm_core - deallocate a top level instance of a
3243 * cm core
3244 * @cm_core: cm's core
3245 */
irdma_cleanup_cm_core(struct irdma_cm_core * cm_core)3246 void irdma_cleanup_cm_core(struct irdma_cm_core *cm_core)
3247 {
3248 if (!cm_core)
3249 return;
3250
3251 del_timer_sync(&cm_core->tcp_timer);
3252
3253 destroy_workqueue(cm_core->event_wq);
3254 cm_core->dev->ws_reset(&cm_core->iwdev->vsi);
3255 }
3256
3257 /**
3258 * irdma_init_tcp_ctx - setup qp context
3259 * @cm_node: connection's node
3260 * @tcp_info: offload info for tcp
3261 * @iwqp: associate qp for the connection
3262 */
irdma_init_tcp_ctx(struct irdma_cm_node * cm_node,struct irdma_tcp_offload_info * tcp_info,struct irdma_qp * iwqp)3263 static void irdma_init_tcp_ctx(struct irdma_cm_node *cm_node,
3264 struct irdma_tcp_offload_info *tcp_info,
3265 struct irdma_qp *iwqp)
3266 {
3267 tcp_info->ipv4 = cm_node->ipv4;
3268 tcp_info->drop_ooo_seg = !iwqp->iwdev->iw_ooo;
3269 tcp_info->wscale = true;
3270 tcp_info->ignore_tcp_opt = true;
3271 tcp_info->ignore_tcp_uns_opt = true;
3272 tcp_info->no_nagle = false;
3273
3274 tcp_info->ttl = IRDMA_DEFAULT_TTL;
3275 tcp_info->rtt_var = IRDMA_DEFAULT_RTT_VAR;
3276 tcp_info->ss_thresh = IRDMA_DEFAULT_SS_THRESH;
3277 tcp_info->rexmit_thresh = IRDMA_DEFAULT_REXMIT_THRESH;
3278
3279 tcp_info->tcp_state = IRDMA_TCP_STATE_ESTABLISHED;
3280 tcp_info->snd_wscale = cm_node->tcp_cntxt.snd_wscale;
3281 tcp_info->rcv_wscale = cm_node->tcp_cntxt.rcv_wscale;
3282
3283 tcp_info->snd_nxt = cm_node->tcp_cntxt.loc_seq_num;
3284 tcp_info->snd_wnd = cm_node->tcp_cntxt.snd_wnd;
3285 tcp_info->rcv_nxt = cm_node->tcp_cntxt.rcv_nxt;
3286 tcp_info->snd_max = cm_node->tcp_cntxt.loc_seq_num;
3287
3288 tcp_info->snd_una = cm_node->tcp_cntxt.loc_seq_num;
3289 tcp_info->cwnd = 2 * cm_node->tcp_cntxt.mss;
3290 tcp_info->snd_wl1 = cm_node->tcp_cntxt.rcv_nxt;
3291 tcp_info->snd_wl2 = cm_node->tcp_cntxt.loc_seq_num;
3292 tcp_info->max_snd_window = cm_node->tcp_cntxt.max_snd_wnd;
3293 tcp_info->rcv_wnd = cm_node->tcp_cntxt.rcv_wnd
3294 << cm_node->tcp_cntxt.rcv_wscale;
3295
3296 tcp_info->flow_label = 0;
3297 tcp_info->snd_mss = (u32)cm_node->tcp_cntxt.mss;
3298 tcp_info->tos = cm_node->tos;
3299 if (cm_node->vlan_id < VLAN_N_VID) {
3300 tcp_info->insert_vlan_tag = true;
3301 tcp_info->vlan_tag = cm_node->vlan_id;
3302 tcp_info->vlan_tag |= cm_node->user_pri << VLAN_PRIO_SHIFT;
3303 }
3304 if (cm_node->ipv4) {
3305 tcp_info->src_port = cm_node->loc_port;
3306 tcp_info->dst_port = cm_node->rem_port;
3307
3308 tcp_info->dest_ip_addr[3] = cm_node->rem_addr[0];
3309 tcp_info->local_ipaddr[3] = cm_node->loc_addr[0];
3310 tcp_info->arp_idx = (u16)irdma_arp_table(iwqp->iwdev->rf,
3311 &tcp_info->dest_ip_addr[3],
3312 true, NULL,
3313 IRDMA_ARP_RESOLVE);
3314 } else {
3315 tcp_info->src_port = cm_node->loc_port;
3316 tcp_info->dst_port = cm_node->rem_port;
3317 memcpy(tcp_info->dest_ip_addr, cm_node->rem_addr,
3318 sizeof(tcp_info->dest_ip_addr));
3319 memcpy(tcp_info->local_ipaddr, cm_node->loc_addr,
3320 sizeof(tcp_info->local_ipaddr));
3321
3322 tcp_info->arp_idx = (u16)irdma_arp_table(iwqp->iwdev->rf,
3323 &tcp_info->dest_ip_addr[0],
3324 false, NULL,
3325 IRDMA_ARP_RESOLVE);
3326 }
3327 }
3328
3329 /**
3330 * irdma_cm_init_tsa_conn - setup qp for RTS
3331 * @iwqp: associate qp for the connection
3332 * @cm_node: connection's node
3333 */
irdma_cm_init_tsa_conn(struct irdma_qp * iwqp,struct irdma_cm_node * cm_node)3334 static void irdma_cm_init_tsa_conn(struct irdma_qp *iwqp,
3335 struct irdma_cm_node *cm_node)
3336 {
3337 struct irdma_iwarp_offload_info *iwarp_info;
3338 struct irdma_qp_host_ctx_info *ctx_info;
3339
3340 iwarp_info = &iwqp->iwarp_info;
3341 ctx_info = &iwqp->ctx_info;
3342
3343 ctx_info->tcp_info = &iwqp->tcp_info;
3344 ctx_info->send_cq_num = iwqp->iwscq->sc_cq.cq_uk.cq_id;
3345 ctx_info->rcv_cq_num = iwqp->iwrcq->sc_cq.cq_uk.cq_id;
3346
3347 iwarp_info->ord_size = cm_node->ord_size;
3348 iwarp_info->ird_size = cm_node->ird_size;
3349 iwarp_info->rd_en = true;
3350 iwarp_info->rdmap_ver = 1;
3351 iwarp_info->ddp_ver = 1;
3352 iwarp_info->pd_id = iwqp->iwpd->sc_pd.pd_id;
3353
3354 ctx_info->tcp_info_valid = true;
3355 ctx_info->iwarp_info_valid = true;
3356 ctx_info->user_pri = cm_node->user_pri;
3357
3358 irdma_init_tcp_ctx(cm_node, &iwqp->tcp_info, iwqp);
3359 if (cm_node->snd_mark_en) {
3360 iwarp_info->snd_mark_en = true;
3361 iwarp_info->snd_mark_offset = (iwqp->tcp_info.snd_nxt & SNDMARKER_SEQNMASK) +
3362 cm_node->lsmm_size;
3363 }
3364
3365 cm_node->state = IRDMA_CM_STATE_OFFLOADED;
3366 iwqp->tcp_info.tcp_state = IRDMA_TCP_STATE_ESTABLISHED;
3367 iwqp->tcp_info.src_mac_addr_idx = iwqp->iwdev->mac_ip_table_idx;
3368
3369 if (cm_node->rcv_mark_en) {
3370 iwarp_info->rcv_mark_en = true;
3371 iwarp_info->align_hdrs = true;
3372 }
3373
3374 irdma_sc_qp_setctx(&iwqp->sc_qp, iwqp->host_ctx.va, ctx_info);
3375
3376 /* once tcp_info is set, no need to do it again */
3377 ctx_info->tcp_info_valid = false;
3378 ctx_info->iwarp_info_valid = false;
3379 }
3380
3381 /**
3382 * irdma_cm_disconn - when a connection is being closed
3383 * @iwqp: associated qp for the connection
3384 */
irdma_cm_disconn(struct irdma_qp * iwqp)3385 void irdma_cm_disconn(struct irdma_qp *iwqp)
3386 {
3387 struct irdma_device *iwdev = iwqp->iwdev;
3388 struct disconn_work *work;
3389 unsigned long flags;
3390
3391 work = kzalloc(sizeof(*work), GFP_ATOMIC);
3392 if (!work)
3393 return;
3394
3395 spin_lock_irqsave(&iwdev->rf->qptable_lock, flags);
3396 if (!iwdev->rf->qp_table[iwqp->ibqp.qp_num]) {
3397 spin_unlock_irqrestore(&iwdev->rf->qptable_lock, flags);
3398 ibdev_dbg(&iwdev->ibdev,
3399 "CM: qp_id %d is already freed\n",
3400 iwqp->ibqp.qp_num);
3401 kfree(work);
3402 return;
3403 }
3404 irdma_qp_add_ref(&iwqp->ibqp);
3405 spin_unlock_irqrestore(&iwdev->rf->qptable_lock, flags);
3406
3407 work->iwqp = iwqp;
3408 INIT_WORK(&work->work, irdma_disconnect_worker);
3409 queue_work(iwdev->cleanup_wq, &work->work);
3410 }
3411
3412 /**
3413 * irdma_qp_disconnect - free qp and close cm
3414 * @iwqp: associate qp for the connection
3415 */
irdma_qp_disconnect(struct irdma_qp * iwqp)3416 static void irdma_qp_disconnect(struct irdma_qp *iwqp)
3417 {
3418 struct irdma_device *iwdev = iwqp->iwdev;
3419
3420 iwqp->active_conn = 0;
3421 /* close the CM node down if it is still active */
3422 ibdev_dbg(&iwdev->ibdev, "CM: Call close API\n");
3423 irdma_cm_close(iwqp->cm_node);
3424 }
3425
3426 /**
3427 * irdma_cm_disconn_true - called by worker thread to disconnect qp
3428 * @iwqp: associate qp for the connection
3429 */
irdma_cm_disconn_true(struct irdma_qp * iwqp)3430 static void irdma_cm_disconn_true(struct irdma_qp *iwqp)
3431 {
3432 struct iw_cm_id *cm_id;
3433 struct irdma_device *iwdev;
3434 struct irdma_sc_qp *qp = &iwqp->sc_qp;
3435 u16 last_ae;
3436 u8 original_hw_tcp_state;
3437 u8 original_ibqp_state;
3438 int disconn_status = 0;
3439 int issue_disconn = 0;
3440 int issue_close = 0;
3441 int issue_flush = 0;
3442 unsigned long flags;
3443 int err;
3444
3445 iwdev = iwqp->iwdev;
3446 spin_lock_irqsave(&iwqp->lock, flags);
3447 if (rdma_protocol_roce(&iwdev->ibdev, 1)) {
3448 struct ib_qp_attr attr;
3449
3450 if (iwqp->flush_issued || iwqp->sc_qp.qp_uk.destroy_pending) {
3451 spin_unlock_irqrestore(&iwqp->lock, flags);
3452 return;
3453 }
3454
3455 spin_unlock_irqrestore(&iwqp->lock, flags);
3456
3457 attr.qp_state = IB_QPS_ERR;
3458 irdma_modify_qp_roce(&iwqp->ibqp, &attr, IB_QP_STATE, NULL);
3459 irdma_ib_qp_event(iwqp, qp->event_type);
3460 return;
3461 }
3462
3463 cm_id = iwqp->cm_id;
3464 original_hw_tcp_state = iwqp->hw_tcp_state;
3465 original_ibqp_state = iwqp->ibqp_state;
3466 last_ae = iwqp->last_aeq;
3467
3468 if (qp->term_flags) {
3469 issue_disconn = 1;
3470 issue_close = 1;
3471 iwqp->cm_id = NULL;
3472 irdma_terminate_del_timer(qp);
3473 if (!iwqp->flush_issued) {
3474 iwqp->flush_issued = 1;
3475 issue_flush = 1;
3476 }
3477 } else if ((original_hw_tcp_state == IRDMA_TCP_STATE_CLOSE_WAIT) ||
3478 ((original_ibqp_state == IB_QPS_RTS) &&
3479 (last_ae == IRDMA_AE_LLP_CONNECTION_RESET))) {
3480 issue_disconn = 1;
3481 if (last_ae == IRDMA_AE_LLP_CONNECTION_RESET)
3482 disconn_status = -ECONNRESET;
3483 }
3484
3485 if (original_hw_tcp_state == IRDMA_TCP_STATE_CLOSED ||
3486 original_hw_tcp_state == IRDMA_TCP_STATE_TIME_WAIT ||
3487 last_ae == IRDMA_AE_RDMAP_ROE_BAD_LLP_CLOSE ||
3488 last_ae == IRDMA_AE_BAD_CLOSE ||
3489 last_ae == IRDMA_AE_LLP_CONNECTION_RESET || iwdev->rf->reset || !cm_id) {
3490 issue_close = 1;
3491 iwqp->cm_id = NULL;
3492 qp->term_flags = 0;
3493 if (!iwqp->flush_issued) {
3494 iwqp->flush_issued = 1;
3495 issue_flush = 1;
3496 }
3497 }
3498
3499 spin_unlock_irqrestore(&iwqp->lock, flags);
3500 if (issue_flush && !iwqp->sc_qp.qp_uk.destroy_pending) {
3501 irdma_flush_wqes(iwqp, IRDMA_FLUSH_SQ | IRDMA_FLUSH_RQ |
3502 IRDMA_FLUSH_WAIT);
3503
3504 if (qp->term_flags)
3505 irdma_ib_qp_event(iwqp, qp->event_type);
3506 }
3507
3508 if (!cm_id || !cm_id->event_handler)
3509 return;
3510
3511 spin_lock_irqsave(&iwdev->cm_core.ht_lock, flags);
3512 if (!iwqp->cm_node) {
3513 spin_unlock_irqrestore(&iwdev->cm_core.ht_lock, flags);
3514 return;
3515 }
3516 refcount_inc(&iwqp->cm_node->refcnt);
3517
3518 spin_unlock_irqrestore(&iwdev->cm_core.ht_lock, flags);
3519
3520 if (issue_disconn) {
3521 err = irdma_send_cm_event(iwqp->cm_node, cm_id,
3522 IW_CM_EVENT_DISCONNECT,
3523 disconn_status);
3524 if (err)
3525 ibdev_dbg(&iwdev->ibdev,
3526 "CM: disconnect event failed: - cm_id = %p\n",
3527 cm_id);
3528 }
3529 if (issue_close) {
3530 cm_id->provider_data = iwqp;
3531 err = irdma_send_cm_event(iwqp->cm_node, cm_id,
3532 IW_CM_EVENT_CLOSE, 0);
3533 if (err)
3534 ibdev_dbg(&iwdev->ibdev,
3535 "CM: close event failed: - cm_id = %p\n",
3536 cm_id);
3537 irdma_qp_disconnect(iwqp);
3538 }
3539 irdma_rem_ref_cm_node(iwqp->cm_node);
3540 }
3541
3542 /**
3543 * irdma_disconnect_worker - worker for connection close
3544 * @work: points or disconn structure
3545 */
irdma_disconnect_worker(struct work_struct * work)3546 static void irdma_disconnect_worker(struct work_struct *work)
3547 {
3548 struct disconn_work *dwork = container_of(work, struct disconn_work, work);
3549 struct irdma_qp *iwqp = dwork->iwqp;
3550
3551 kfree(dwork);
3552 irdma_cm_disconn_true(iwqp);
3553 irdma_qp_rem_ref(&iwqp->ibqp);
3554 }
3555
3556 /**
3557 * irdma_free_lsmm_rsrc - free lsmm memory and deregister
3558 * @iwqp: associate qp for the connection
3559 */
irdma_free_lsmm_rsrc(struct irdma_qp * iwqp)3560 void irdma_free_lsmm_rsrc(struct irdma_qp *iwqp)
3561 {
3562 struct irdma_device *iwdev;
3563
3564 iwdev = iwqp->iwdev;
3565
3566 if (iwqp->ietf_mem.va) {
3567 if (iwqp->lsmm_mr)
3568 iwdev->ibdev.ops.dereg_mr(iwqp->lsmm_mr, NULL);
3569 dma_free_coherent(iwdev->rf->sc_dev.hw->device,
3570 iwqp->ietf_mem.size, iwqp->ietf_mem.va,
3571 iwqp->ietf_mem.pa);
3572 iwqp->ietf_mem.va = NULL;
3573 iwqp->ietf_mem.va = NULL;
3574 }
3575 }
3576
3577 /**
3578 * irdma_accept - registered call for connection to be accepted
3579 * @cm_id: cm information for passive connection
3580 * @conn_param: accpet parameters
3581 */
irdma_accept(struct iw_cm_id * cm_id,struct iw_cm_conn_param * conn_param)3582 int irdma_accept(struct iw_cm_id *cm_id, struct iw_cm_conn_param *conn_param)
3583 {
3584 struct ib_qp *ibqp;
3585 struct irdma_qp *iwqp;
3586 struct irdma_device *iwdev;
3587 struct irdma_sc_dev *dev;
3588 struct irdma_cm_node *cm_node;
3589 struct ib_qp_attr attr = {};
3590 int passive_state;
3591 struct ib_mr *ibmr;
3592 struct irdma_pd *iwpd;
3593 u16 buf_len = 0;
3594 struct irdma_kmem_info accept;
3595 u64 tagged_offset;
3596 int wait_ret;
3597 int ret = 0;
3598
3599 ibqp = irdma_get_qp(cm_id->device, conn_param->qpn);
3600 if (!ibqp)
3601 return -EINVAL;
3602
3603 iwqp = to_iwqp(ibqp);
3604 iwdev = iwqp->iwdev;
3605 dev = &iwdev->rf->sc_dev;
3606 cm_node = cm_id->provider_data;
3607
3608 if (((struct sockaddr_in *)&cm_id->local_addr)->sin_family == AF_INET) {
3609 cm_node->ipv4 = true;
3610 cm_node->vlan_id = irdma_get_vlan_ipv4(cm_node->loc_addr);
3611 } else {
3612 cm_node->ipv4 = false;
3613 irdma_netdev_vlan_ipv6(cm_node->loc_addr, &cm_node->vlan_id,
3614 NULL);
3615 }
3616 ibdev_dbg(&iwdev->ibdev, "CM: Accept vlan_id=%d\n",
3617 cm_node->vlan_id);
3618
3619 trace_irdma_accept(cm_node, 0, NULL);
3620
3621 if (cm_node->state == IRDMA_CM_STATE_LISTENER_DESTROYED) {
3622 ret = -EINVAL;
3623 goto error;
3624 }
3625
3626 passive_state = atomic_add_return(1, &cm_node->passive_state);
3627 if (passive_state == IRDMA_SEND_RESET_EVENT) {
3628 ret = -ECONNRESET;
3629 goto error;
3630 }
3631
3632 buf_len = conn_param->private_data_len + IRDMA_MAX_IETF_SIZE;
3633 iwqp->ietf_mem.size = ALIGN(buf_len, 1);
3634 iwqp->ietf_mem.va = dma_alloc_coherent(dev->hw->device,
3635 iwqp->ietf_mem.size,
3636 &iwqp->ietf_mem.pa, GFP_KERNEL);
3637 if (!iwqp->ietf_mem.va) {
3638 ret = -ENOMEM;
3639 goto error;
3640 }
3641
3642 cm_node->pdata.size = conn_param->private_data_len;
3643 accept.addr = iwqp->ietf_mem.va;
3644 accept.size = irdma_cm_build_mpa_frame(cm_node, &accept, MPA_KEY_REPLY);
3645 memcpy((u8 *)accept.addr + accept.size, conn_param->private_data,
3646 conn_param->private_data_len);
3647
3648 if (cm_node->dev->ws_add(iwqp->sc_qp.vsi, cm_node->user_pri)) {
3649 ret = -ENOMEM;
3650 goto error;
3651 }
3652 iwqp->sc_qp.user_pri = cm_node->user_pri;
3653 irdma_qp_add_qos(&iwqp->sc_qp);
3654 /* setup our first outgoing iWarp send WQE (the IETF frame response) */
3655 iwpd = iwqp->iwpd;
3656 tagged_offset = (uintptr_t)iwqp->ietf_mem.va;
3657 ibmr = irdma_reg_phys_mr(&iwpd->ibpd, iwqp->ietf_mem.pa, buf_len,
3658 IB_ACCESS_LOCAL_WRITE, &tagged_offset);
3659 if (IS_ERR(ibmr)) {
3660 ret = -ENOMEM;
3661 goto error;
3662 }
3663
3664 ibmr->pd = &iwpd->ibpd;
3665 ibmr->device = iwpd->ibpd.device;
3666 iwqp->lsmm_mr = ibmr;
3667 if (iwqp->page)
3668 iwqp->sc_qp.qp_uk.sq_base = kmap_local_page(iwqp->page);
3669
3670 cm_node->lsmm_size = accept.size + conn_param->private_data_len;
3671 irdma_sc_send_lsmm(&iwqp->sc_qp, iwqp->ietf_mem.va, cm_node->lsmm_size,
3672 ibmr->lkey);
3673
3674 if (iwqp->page)
3675 kunmap_local(iwqp->sc_qp.qp_uk.sq_base);
3676
3677 iwqp->cm_id = cm_id;
3678 cm_node->cm_id = cm_id;
3679
3680 cm_id->provider_data = iwqp;
3681 iwqp->active_conn = 0;
3682 iwqp->cm_node = cm_node;
3683 cm_node->iwqp = iwqp;
3684 irdma_cm_init_tsa_conn(iwqp, cm_node);
3685 irdma_qp_add_ref(&iwqp->ibqp);
3686 cm_id->add_ref(cm_id);
3687
3688 attr.qp_state = IB_QPS_RTS;
3689 cm_node->qhash_set = false;
3690 cm_node->cm_core->cm_free_ah(cm_node);
3691
3692 irdma_modify_qp(&iwqp->ibqp, &attr, IB_QP_STATE, NULL);
3693 if (dev->hw_attrs.uk_attrs.feature_flags & IRDMA_FEATURE_RTS_AE) {
3694 wait_ret = wait_event_interruptible_timeout(iwqp->waitq,
3695 iwqp->rts_ae_rcvd,
3696 IRDMA_MAX_TIMEOUT);
3697 if (!wait_ret) {
3698 ibdev_dbg(&iwdev->ibdev,
3699 "CM: Slow Connection: cm_node=%p, loc_port=%d, rem_port=%d, cm_id=%p\n",
3700 cm_node, cm_node->loc_port,
3701 cm_node->rem_port, cm_node->cm_id);
3702 ret = -ECONNRESET;
3703 goto error;
3704 }
3705 }
3706
3707 irdma_send_cm_event(cm_node, cm_id, IW_CM_EVENT_ESTABLISHED, 0);
3708 cm_node->accelerated = true;
3709 complete(&cm_node->establish_comp);
3710
3711 if (cm_node->accept_pend) {
3712 atomic_dec(&cm_node->listener->pend_accepts_cnt);
3713 cm_node->accept_pend = 0;
3714 }
3715
3716 ibdev_dbg(&iwdev->ibdev,
3717 "CM: rem_port=0x%04x, loc_port=0x%04x rem_addr=%pI4 loc_addr=%pI4 cm_node=%p cm_id=%p qp_id = %d\n\n",
3718 cm_node->rem_port, cm_node->loc_port, cm_node->rem_addr,
3719 cm_node->loc_addr, cm_node, cm_id, ibqp->qp_num);
3720 cm_node->cm_core->stats_accepts++;
3721
3722 return 0;
3723 error:
3724 irdma_free_lsmm_rsrc(iwqp);
3725 irdma_rem_ref_cm_node(cm_node);
3726
3727 return ret;
3728 }
3729
3730 /**
3731 * irdma_reject - registered call for connection to be rejected
3732 * @cm_id: cm information for passive connection
3733 * @pdata: private data to be sent
3734 * @pdata_len: private data length
3735 */
irdma_reject(struct iw_cm_id * cm_id,const void * pdata,u8 pdata_len)3736 int irdma_reject(struct iw_cm_id *cm_id, const void *pdata, u8 pdata_len)
3737 {
3738 struct irdma_device *iwdev;
3739 struct irdma_cm_node *cm_node;
3740
3741 cm_node = cm_id->provider_data;
3742 cm_node->pdata.size = pdata_len;
3743
3744 trace_irdma_reject(cm_node, 0, NULL);
3745
3746 iwdev = to_iwdev(cm_id->device);
3747 if (!iwdev)
3748 return -EINVAL;
3749
3750 cm_node->cm_core->stats_rejects++;
3751
3752 if (pdata_len + sizeof(struct ietf_mpa_v2) > IRDMA_MAX_CM_BUF)
3753 return -EINVAL;
3754
3755 return irdma_cm_reject(cm_node, pdata, pdata_len);
3756 }
3757
3758 /**
3759 * irdma_connect - registered call for connection to be established
3760 * @cm_id: cm information for passive connection
3761 * @conn_param: Information about the connection
3762 */
irdma_connect(struct iw_cm_id * cm_id,struct iw_cm_conn_param * conn_param)3763 int irdma_connect(struct iw_cm_id *cm_id, struct iw_cm_conn_param *conn_param)
3764 {
3765 struct ib_qp *ibqp;
3766 struct irdma_qp *iwqp;
3767 struct irdma_device *iwdev;
3768 struct irdma_cm_node *cm_node;
3769 struct irdma_cm_info cm_info;
3770 struct sockaddr_in *laddr;
3771 struct sockaddr_in *raddr;
3772 struct sockaddr_in6 *laddr6;
3773 struct sockaddr_in6 *raddr6;
3774 int ret = 0;
3775
3776 ibqp = irdma_get_qp(cm_id->device, conn_param->qpn);
3777 if (!ibqp)
3778 return -EINVAL;
3779 iwqp = to_iwqp(ibqp);
3780 if (!iwqp)
3781 return -EINVAL;
3782 iwdev = iwqp->iwdev;
3783 if (!iwdev)
3784 return -EINVAL;
3785
3786 laddr = (struct sockaddr_in *)&cm_id->m_local_addr;
3787 raddr = (struct sockaddr_in *)&cm_id->m_remote_addr;
3788 laddr6 = (struct sockaddr_in6 *)&cm_id->m_local_addr;
3789 raddr6 = (struct sockaddr_in6 *)&cm_id->m_remote_addr;
3790
3791 if (!(laddr->sin_port) || !(raddr->sin_port))
3792 return -EINVAL;
3793
3794 iwqp->active_conn = 1;
3795 iwqp->cm_id = NULL;
3796 cm_id->provider_data = iwqp;
3797
3798 /* set up the connection params for the node */
3799 if (cm_id->remote_addr.ss_family == AF_INET) {
3800 if (iwdev->vsi.mtu < IRDMA_MIN_MTU_IPV4)
3801 return -EINVAL;
3802
3803 cm_info.ipv4 = true;
3804 memset(cm_info.loc_addr, 0, sizeof(cm_info.loc_addr));
3805 memset(cm_info.rem_addr, 0, sizeof(cm_info.rem_addr));
3806 cm_info.loc_addr[0] = ntohl(laddr->sin_addr.s_addr);
3807 cm_info.rem_addr[0] = ntohl(raddr->sin_addr.s_addr);
3808 cm_info.loc_port = ntohs(laddr->sin_port);
3809 cm_info.rem_port = ntohs(raddr->sin_port);
3810 cm_info.vlan_id = irdma_get_vlan_ipv4(cm_info.loc_addr);
3811 } else {
3812 if (iwdev->vsi.mtu < IRDMA_MIN_MTU_IPV6)
3813 return -EINVAL;
3814
3815 cm_info.ipv4 = false;
3816 irdma_copy_ip_ntohl(cm_info.loc_addr,
3817 laddr6->sin6_addr.in6_u.u6_addr32);
3818 irdma_copy_ip_ntohl(cm_info.rem_addr,
3819 raddr6->sin6_addr.in6_u.u6_addr32);
3820 cm_info.loc_port = ntohs(laddr6->sin6_port);
3821 cm_info.rem_port = ntohs(raddr6->sin6_port);
3822 irdma_netdev_vlan_ipv6(cm_info.loc_addr, &cm_info.vlan_id,
3823 NULL);
3824 }
3825 cm_info.cm_id = cm_id;
3826 cm_info.qh_qpid = iwdev->vsi.ilq->qp_id;
3827 cm_info.tos = cm_id->tos;
3828 if (iwdev->vsi.dscp_mode)
3829 cm_info.user_pri =
3830 iwqp->sc_qp.vsi->dscp_map[irdma_tos2dscp(cm_info.tos)];
3831 else
3832 cm_info.user_pri = rt_tos2priority(cm_id->tos);
3833
3834 if (iwqp->sc_qp.dev->ws_add(iwqp->sc_qp.vsi, cm_info.user_pri))
3835 return -ENOMEM;
3836 iwqp->sc_qp.user_pri = cm_info.user_pri;
3837 irdma_qp_add_qos(&iwqp->sc_qp);
3838 ibdev_dbg(&iwdev->ibdev, "DCB: TOS:[%d] UP:[%d]\n", cm_id->tos,
3839 cm_info.user_pri);
3840
3841 trace_irdma_dcb_tos(iwdev, cm_id->tos, cm_info.user_pri);
3842
3843 ret = irdma_create_cm_node(&iwdev->cm_core, iwdev, conn_param, &cm_info,
3844 &cm_node);
3845 if (ret)
3846 return ret;
3847 ret = cm_node->cm_core->cm_create_ah(cm_node, true);
3848 if (ret)
3849 goto err;
3850 if (irdma_manage_qhash(iwdev, &cm_info,
3851 IRDMA_QHASH_TYPE_TCP_ESTABLISHED,
3852 IRDMA_QHASH_MANAGE_TYPE_ADD, NULL, true)) {
3853 ret = -EINVAL;
3854 goto err;
3855 }
3856 cm_node->qhash_set = true;
3857
3858 cm_node->apbvt_entry = irdma_add_apbvt(iwdev, cm_info.loc_port);
3859 if (!cm_node->apbvt_entry) {
3860 ret = -EINVAL;
3861 goto err;
3862 }
3863
3864 cm_node->apbvt_set = true;
3865 iwqp->cm_node = cm_node;
3866 cm_node->iwqp = iwqp;
3867 iwqp->cm_id = cm_id;
3868 irdma_qp_add_ref(&iwqp->ibqp);
3869 cm_id->add_ref(cm_id);
3870
3871 if (cm_node->state != IRDMA_CM_STATE_OFFLOADED) {
3872 cm_node->state = IRDMA_CM_STATE_SYN_SENT;
3873 ret = irdma_send_syn(cm_node, 0);
3874 if (ret)
3875 goto err;
3876 }
3877
3878 ibdev_dbg(&iwdev->ibdev,
3879 "CM: rem_port=0x%04x, loc_port=0x%04x rem_addr=%pI4 loc_addr=%pI4 cm_node=%p cm_id=%p qp_id = %d\n\n",
3880 cm_node->rem_port, cm_node->loc_port, cm_node->rem_addr,
3881 cm_node->loc_addr, cm_node, cm_id, ibqp->qp_num);
3882
3883 trace_irdma_connect(cm_node, 0, NULL);
3884
3885 return 0;
3886
3887 err:
3888 if (cm_info.ipv4)
3889 ibdev_dbg(&iwdev->ibdev,
3890 "CM: connect() FAILED: dest addr=%pI4",
3891 cm_info.rem_addr);
3892 else
3893 ibdev_dbg(&iwdev->ibdev,
3894 "CM: connect() FAILED: dest addr=%pI6",
3895 cm_info.rem_addr);
3896 irdma_rem_ref_cm_node(cm_node);
3897 iwdev->cm_core.stats_connect_errs++;
3898
3899 return ret;
3900 }
3901
3902 /**
3903 * irdma_create_listen - registered call creating listener
3904 * @cm_id: cm information for passive connection
3905 * @backlog: to max accept pending count
3906 */
irdma_create_listen(struct iw_cm_id * cm_id,int backlog)3907 int irdma_create_listen(struct iw_cm_id *cm_id, int backlog)
3908 {
3909 struct irdma_device *iwdev;
3910 struct irdma_cm_listener *cm_listen_node;
3911 struct irdma_cm_info cm_info = {};
3912 struct sockaddr_in *laddr;
3913 struct sockaddr_in6 *laddr6;
3914 bool wildcard = false;
3915 int err;
3916
3917 iwdev = to_iwdev(cm_id->device);
3918 if (!iwdev)
3919 return -EINVAL;
3920
3921 laddr = (struct sockaddr_in *)&cm_id->m_local_addr;
3922 laddr6 = (struct sockaddr_in6 *)&cm_id->m_local_addr;
3923 cm_info.qh_qpid = iwdev->vsi.ilq->qp_id;
3924
3925 if (laddr->sin_family == AF_INET) {
3926 if (iwdev->vsi.mtu < IRDMA_MIN_MTU_IPV4)
3927 return -EINVAL;
3928
3929 cm_info.ipv4 = true;
3930 cm_info.loc_addr[0] = ntohl(laddr->sin_addr.s_addr);
3931 cm_info.loc_port = ntohs(laddr->sin_port);
3932
3933 if (laddr->sin_addr.s_addr != htonl(INADDR_ANY)) {
3934 cm_info.vlan_id = irdma_get_vlan_ipv4(cm_info.loc_addr);
3935 } else {
3936 cm_info.vlan_id = 0xFFFF;
3937 wildcard = true;
3938 }
3939 } else {
3940 if (iwdev->vsi.mtu < IRDMA_MIN_MTU_IPV6)
3941 return -EINVAL;
3942
3943 cm_info.ipv4 = false;
3944 irdma_copy_ip_ntohl(cm_info.loc_addr,
3945 laddr6->sin6_addr.in6_u.u6_addr32);
3946 cm_info.loc_port = ntohs(laddr6->sin6_port);
3947 if (ipv6_addr_type(&laddr6->sin6_addr) != IPV6_ADDR_ANY) {
3948 irdma_netdev_vlan_ipv6(cm_info.loc_addr,
3949 &cm_info.vlan_id, NULL);
3950 } else {
3951 cm_info.vlan_id = 0xFFFF;
3952 wildcard = true;
3953 }
3954 }
3955
3956 if (cm_info.vlan_id >= VLAN_N_VID && iwdev->dcb_vlan_mode)
3957 cm_info.vlan_id = 0;
3958 cm_info.backlog = backlog;
3959 cm_info.cm_id = cm_id;
3960
3961 trace_irdma_create_listen(iwdev, &cm_info);
3962
3963 cm_listen_node = irdma_make_listen_node(&iwdev->cm_core, iwdev,
3964 &cm_info);
3965 if (!cm_listen_node) {
3966 ibdev_dbg(&iwdev->ibdev,
3967 "CM: cm_listen_node == NULL\n");
3968 return -ENOMEM;
3969 }
3970
3971 cm_id->provider_data = cm_listen_node;
3972
3973 cm_listen_node->tos = cm_id->tos;
3974 if (iwdev->vsi.dscp_mode)
3975 cm_listen_node->user_pri =
3976 iwdev->vsi.dscp_map[irdma_tos2dscp(cm_id->tos)];
3977 else
3978 cm_listen_node->user_pri = rt_tos2priority(cm_id->tos);
3979 cm_info.user_pri = cm_listen_node->user_pri;
3980 if (!cm_listen_node->reused_node) {
3981 if (wildcard) {
3982 err = irdma_add_mqh(iwdev, &cm_info, cm_listen_node);
3983 if (err)
3984 goto error;
3985 } else {
3986 err = irdma_manage_qhash(iwdev, &cm_info,
3987 IRDMA_QHASH_TYPE_TCP_SYN,
3988 IRDMA_QHASH_MANAGE_TYPE_ADD,
3989 NULL, true);
3990 if (err)
3991 goto error;
3992
3993 cm_listen_node->qhash_set = true;
3994 }
3995
3996 cm_listen_node->apbvt_entry = irdma_add_apbvt(iwdev,
3997 cm_info.loc_port);
3998 if (!cm_listen_node->apbvt_entry)
3999 goto error;
4000 }
4001 cm_id->add_ref(cm_id);
4002 cm_listen_node->cm_core->stats_listen_created++;
4003 ibdev_dbg(&iwdev->ibdev,
4004 "CM: loc_port=0x%04x loc_addr=%pI4 cm_listen_node=%p cm_id=%p qhash_set=%d vlan_id=%d\n",
4005 cm_listen_node->loc_port, cm_listen_node->loc_addr,
4006 cm_listen_node, cm_listen_node->cm_id,
4007 cm_listen_node->qhash_set, cm_listen_node->vlan_id);
4008
4009 return 0;
4010
4011 error:
4012
4013 irdma_cm_del_listen(&iwdev->cm_core, cm_listen_node, false);
4014
4015 return -EINVAL;
4016 }
4017
4018 /**
4019 * irdma_destroy_listen - registered call to destroy listener
4020 * @cm_id: cm information for passive connection
4021 */
irdma_destroy_listen(struct iw_cm_id * cm_id)4022 int irdma_destroy_listen(struct iw_cm_id *cm_id)
4023 {
4024 struct irdma_device *iwdev;
4025
4026 iwdev = to_iwdev(cm_id->device);
4027 if (cm_id->provider_data)
4028 irdma_cm_del_listen(&iwdev->cm_core, cm_id->provider_data,
4029 true);
4030 else
4031 ibdev_dbg(&iwdev->ibdev,
4032 "CM: cm_id->provider_data was NULL\n");
4033
4034 cm_id->rem_ref(cm_id);
4035
4036 return 0;
4037 }
4038
4039 /**
4040 * irdma_teardown_list_prep - add conn nodes slated for tear down to list
4041 * @cm_core: cm's core
4042 * @teardown_list: a list to which cm_node will be selected
4043 * @ipaddr: pointer to ip address
4044 * @nfo: pointer to cm_info structure instance
4045 * @disconnect_all: flag indicating disconnect all QPs
4046 */
irdma_teardown_list_prep(struct irdma_cm_core * cm_core,struct list_head * teardown_list,u32 * ipaddr,struct irdma_cm_info * nfo,bool disconnect_all)4047 static void irdma_teardown_list_prep(struct irdma_cm_core *cm_core,
4048 struct list_head *teardown_list,
4049 u32 *ipaddr,
4050 struct irdma_cm_info *nfo,
4051 bool disconnect_all)
4052 {
4053 struct irdma_cm_node *cm_node;
4054 int bkt;
4055
4056 hash_for_each_rcu(cm_core->cm_hash_tbl, bkt, cm_node, list) {
4057 if ((disconnect_all ||
4058 (nfo->vlan_id == cm_node->vlan_id &&
4059 !memcmp(cm_node->loc_addr, ipaddr, nfo->ipv4 ? 4 : 16))) &&
4060 refcount_inc_not_zero(&cm_node->refcnt))
4061 list_add(&cm_node->teardown_entry, teardown_list);
4062 }
4063 }
4064
4065 /**
4066 * irdma_cm_event_connected - handle connected active node
4067 * @event: the info for cm_node of connection
4068 */
irdma_cm_event_connected(struct irdma_cm_event * event)4069 static void irdma_cm_event_connected(struct irdma_cm_event *event)
4070 {
4071 struct irdma_qp *iwqp;
4072 struct irdma_device *iwdev;
4073 struct irdma_cm_node *cm_node;
4074 struct irdma_sc_dev *dev;
4075 struct ib_qp_attr attr = {};
4076 struct iw_cm_id *cm_id;
4077 int status;
4078 bool read0;
4079 int wait_ret = 0;
4080
4081 cm_node = event->cm_node;
4082 cm_id = cm_node->cm_id;
4083 iwqp = cm_id->provider_data;
4084 iwdev = iwqp->iwdev;
4085 dev = &iwdev->rf->sc_dev;
4086 if (iwqp->sc_qp.qp_uk.destroy_pending) {
4087 status = -ETIMEDOUT;
4088 goto error;
4089 }
4090
4091 irdma_cm_init_tsa_conn(iwqp, cm_node);
4092 read0 = (cm_node->send_rdma0_op == SEND_RDMA_READ_ZERO);
4093 if (iwqp->page)
4094 iwqp->sc_qp.qp_uk.sq_base = kmap_local_page(iwqp->page);
4095 irdma_sc_send_rtt(&iwqp->sc_qp, read0);
4096 if (iwqp->page)
4097 kunmap_local(iwqp->sc_qp.qp_uk.sq_base);
4098
4099 attr.qp_state = IB_QPS_RTS;
4100 cm_node->qhash_set = false;
4101 irdma_modify_qp(&iwqp->ibqp, &attr, IB_QP_STATE, NULL);
4102 if (dev->hw_attrs.uk_attrs.feature_flags & IRDMA_FEATURE_RTS_AE) {
4103 wait_ret = wait_event_interruptible_timeout(iwqp->waitq,
4104 iwqp->rts_ae_rcvd,
4105 IRDMA_MAX_TIMEOUT);
4106 if (!wait_ret)
4107 ibdev_dbg(&iwdev->ibdev,
4108 "CM: Slow Connection: cm_node=%p, loc_port=%d, rem_port=%d, cm_id=%p\n",
4109 cm_node, cm_node->loc_port,
4110 cm_node->rem_port, cm_node->cm_id);
4111 }
4112
4113 irdma_send_cm_event(cm_node, cm_id, IW_CM_EVENT_CONNECT_REPLY, 0);
4114 cm_node->accelerated = true;
4115 complete(&cm_node->establish_comp);
4116 cm_node->cm_core->cm_free_ah(cm_node);
4117 return;
4118
4119 error:
4120 iwqp->cm_id = NULL;
4121 cm_id->provider_data = NULL;
4122 irdma_send_cm_event(event->cm_node, cm_id, IW_CM_EVENT_CONNECT_REPLY,
4123 status);
4124 irdma_rem_ref_cm_node(event->cm_node);
4125 }
4126
4127 /**
4128 * irdma_cm_event_reset - handle reset
4129 * @event: the info for cm_node of connection
4130 */
irdma_cm_event_reset(struct irdma_cm_event * event)4131 static void irdma_cm_event_reset(struct irdma_cm_event *event)
4132 {
4133 struct irdma_cm_node *cm_node = event->cm_node;
4134 struct iw_cm_id *cm_id = cm_node->cm_id;
4135 struct irdma_qp *iwqp;
4136
4137 if (!cm_id)
4138 return;
4139
4140 iwqp = cm_id->provider_data;
4141 if (!iwqp)
4142 return;
4143
4144 ibdev_dbg(&cm_node->iwdev->ibdev,
4145 "CM: reset event %p - cm_id = %p\n", event->cm_node, cm_id);
4146 iwqp->cm_id = NULL;
4147
4148 irdma_send_cm_event(cm_node, cm_node->cm_id, IW_CM_EVENT_DISCONNECT,
4149 -ECONNRESET);
4150 irdma_send_cm_event(cm_node, cm_node->cm_id, IW_CM_EVENT_CLOSE, 0);
4151 }
4152
4153 /**
4154 * irdma_cm_event_handler - send event to cm upper layer
4155 * @work: pointer of cm event info.
4156 */
irdma_cm_event_handler(struct work_struct * work)4157 static void irdma_cm_event_handler(struct work_struct *work)
4158 {
4159 struct irdma_cm_event *event = container_of(work, struct irdma_cm_event, event_work);
4160 struct irdma_cm_node *cm_node;
4161
4162 if (!event || !event->cm_node || !event->cm_node->cm_core)
4163 return;
4164
4165 cm_node = event->cm_node;
4166 trace_irdma_cm_event_handler(cm_node, event->type, NULL);
4167
4168 switch (event->type) {
4169 case IRDMA_CM_EVENT_MPA_REQ:
4170 irdma_send_cm_event(cm_node, cm_node->cm_id,
4171 IW_CM_EVENT_CONNECT_REQUEST, 0);
4172 break;
4173 case IRDMA_CM_EVENT_RESET:
4174 irdma_cm_event_reset(event);
4175 break;
4176 case IRDMA_CM_EVENT_CONNECTED:
4177 if (!event->cm_node->cm_id ||
4178 event->cm_node->state != IRDMA_CM_STATE_OFFLOADED)
4179 break;
4180 irdma_cm_event_connected(event);
4181 break;
4182 case IRDMA_CM_EVENT_MPA_REJECT:
4183 if (!event->cm_node->cm_id ||
4184 cm_node->state == IRDMA_CM_STATE_OFFLOADED)
4185 break;
4186 irdma_send_cm_event(cm_node, cm_node->cm_id,
4187 IW_CM_EVENT_CONNECT_REPLY, -ECONNREFUSED);
4188 break;
4189 case IRDMA_CM_EVENT_ABORTED:
4190 if (!event->cm_node->cm_id ||
4191 event->cm_node->state == IRDMA_CM_STATE_OFFLOADED)
4192 break;
4193 irdma_event_connect_error(event);
4194 break;
4195 default:
4196 ibdev_dbg(&cm_node->iwdev->ibdev,
4197 "CM: bad event type = %d\n", event->type);
4198 break;
4199 }
4200
4201 irdma_rem_ref_cm_node(event->cm_node);
4202 kfree(event);
4203 }
4204
4205 /**
4206 * irdma_cm_post_event - queue event request for worker thread
4207 * @event: cm node's info for up event call
4208 */
irdma_cm_post_event(struct irdma_cm_event * event)4209 static void irdma_cm_post_event(struct irdma_cm_event *event)
4210 {
4211 refcount_inc(&event->cm_node->refcnt);
4212 INIT_WORK(&event->event_work, irdma_cm_event_handler);
4213 queue_work(event->cm_node->cm_core->event_wq, &event->event_work);
4214 }
4215
4216 /**
4217 * irdma_cm_teardown_connections - teardown QPs
4218 * @iwdev: device pointer
4219 * @ipaddr: Pointer to IPv4 or IPv6 address
4220 * @nfo: Connection info
4221 * @disconnect_all: flag indicating disconnect all QPs
4222 *
4223 * teardown QPs where source or destination addr matches ip addr
4224 */
irdma_cm_teardown_connections(struct irdma_device * iwdev,u32 * ipaddr,struct irdma_cm_info * nfo,bool disconnect_all)4225 void irdma_cm_teardown_connections(struct irdma_device *iwdev, u32 *ipaddr,
4226 struct irdma_cm_info *nfo,
4227 bool disconnect_all)
4228 {
4229 struct irdma_cm_core *cm_core = &iwdev->cm_core;
4230 struct list_head *list_core_temp;
4231 struct list_head *list_node;
4232 struct irdma_cm_node *cm_node;
4233 struct list_head teardown_list;
4234 struct ib_qp_attr attr;
4235
4236 INIT_LIST_HEAD(&teardown_list);
4237
4238 rcu_read_lock();
4239 irdma_teardown_list_prep(cm_core, &teardown_list, ipaddr, nfo, disconnect_all);
4240 rcu_read_unlock();
4241
4242 list_for_each_safe (list_node, list_core_temp, &teardown_list) {
4243 cm_node = container_of(list_node, struct irdma_cm_node,
4244 teardown_entry);
4245 attr.qp_state = IB_QPS_ERR;
4246 irdma_modify_qp(&cm_node->iwqp->ibqp, &attr, IB_QP_STATE, NULL);
4247 if (iwdev->rf->reset)
4248 irdma_cm_disconn(cm_node->iwqp);
4249 irdma_rem_ref_cm_node(cm_node);
4250 }
4251 }
4252
4253 /**
4254 * irdma_qhash_ctrl - enable/disable qhash for list
4255 * @iwdev: device pointer
4256 * @parent_listen_node: parent listen node
4257 * @nfo: cm info node
4258 * @ipaddr: Pointer to IPv4 or IPv6 address
4259 * @ipv4: flag indicating IPv4 when true
4260 * @ifup: flag indicating interface up when true
4261 *
4262 * Enables or disables the qhash for the node in the child
4263 * listen list that matches ipaddr. If no matching IP was found
4264 * it will allocate and add a new child listen node to the
4265 * parent listen node. The listen_list_lock is assumed to be
4266 * held when called.
4267 */
irdma_qhash_ctrl(struct irdma_device * iwdev,struct irdma_cm_listener * parent_listen_node,struct irdma_cm_info * nfo,u32 * ipaddr,bool ipv4,bool ifup)4268 static void irdma_qhash_ctrl(struct irdma_device *iwdev,
4269 struct irdma_cm_listener *parent_listen_node,
4270 struct irdma_cm_info *nfo, u32 *ipaddr, bool ipv4,
4271 bool ifup)
4272 {
4273 struct list_head *child_listen_list = &parent_listen_node->child_listen_list;
4274 struct irdma_cm_listener *child_listen_node;
4275 struct list_head *pos, *tpos;
4276 bool node_allocated = false;
4277 enum irdma_quad_hash_manage_type op = ifup ?
4278 IRDMA_QHASH_MANAGE_TYPE_ADD :
4279 IRDMA_QHASH_MANAGE_TYPE_DELETE;
4280 int err;
4281
4282 list_for_each_safe (pos, tpos, child_listen_list) {
4283 child_listen_node = list_entry(pos, struct irdma_cm_listener,
4284 child_listen_list);
4285 if (!memcmp(child_listen_node->loc_addr, ipaddr, ipv4 ? 4 : 16))
4286 goto set_qhash;
4287 }
4288
4289 /* if not found then add a child listener if interface is going up */
4290 if (!ifup)
4291 return;
4292 child_listen_node = kmemdup(parent_listen_node,
4293 sizeof(*child_listen_node), GFP_ATOMIC);
4294 if (!child_listen_node)
4295 return;
4296
4297 node_allocated = true;
4298 memcpy(child_listen_node->loc_addr, ipaddr, ipv4 ? 4 : 16);
4299
4300 set_qhash:
4301 memcpy(nfo->loc_addr, child_listen_node->loc_addr,
4302 sizeof(nfo->loc_addr));
4303 nfo->vlan_id = child_listen_node->vlan_id;
4304 err = irdma_manage_qhash(iwdev, nfo, IRDMA_QHASH_TYPE_TCP_SYN, op, NULL,
4305 false);
4306 if (!err) {
4307 child_listen_node->qhash_set = ifup;
4308 if (node_allocated)
4309 list_add(&child_listen_node->child_listen_list,
4310 &parent_listen_node->child_listen_list);
4311 } else if (node_allocated) {
4312 kfree(child_listen_node);
4313 }
4314 }
4315
4316 /**
4317 * irdma_if_notify - process an ifdown on an interface
4318 * @iwdev: device pointer
4319 * @netdev: network device structure
4320 * @ipaddr: Pointer to IPv4 or IPv6 address
4321 * @ipv4: flag indicating IPv4 when true
4322 * @ifup: flag indicating interface up when true
4323 */
irdma_if_notify(struct irdma_device * iwdev,struct net_device * netdev,u32 * ipaddr,bool ipv4,bool ifup)4324 void irdma_if_notify(struct irdma_device *iwdev, struct net_device *netdev,
4325 u32 *ipaddr, bool ipv4, bool ifup)
4326 {
4327 struct irdma_cm_core *cm_core = &iwdev->cm_core;
4328 unsigned long flags;
4329 struct irdma_cm_listener *listen_node;
4330 static const u32 ip_zero[4] = { 0, 0, 0, 0 };
4331 struct irdma_cm_info nfo = {};
4332 u16 vlan_id = rdma_vlan_dev_vlan_id(netdev);
4333 enum irdma_quad_hash_manage_type op = ifup ?
4334 IRDMA_QHASH_MANAGE_TYPE_ADD :
4335 IRDMA_QHASH_MANAGE_TYPE_DELETE;
4336
4337 nfo.vlan_id = vlan_id;
4338 nfo.ipv4 = ipv4;
4339 nfo.qh_qpid = 1;
4340
4341 /* Disable or enable qhash for listeners */
4342 spin_lock_irqsave(&cm_core->listen_list_lock, flags);
4343 list_for_each_entry (listen_node, &cm_core->listen_list, list) {
4344 if (vlan_id != listen_node->vlan_id ||
4345 (memcmp(listen_node->loc_addr, ipaddr, ipv4 ? 4 : 16) &&
4346 memcmp(listen_node->loc_addr, ip_zero, ipv4 ? 4 : 16)))
4347 continue;
4348
4349 memcpy(nfo.loc_addr, listen_node->loc_addr,
4350 sizeof(nfo.loc_addr));
4351 nfo.loc_port = listen_node->loc_port;
4352 nfo.user_pri = listen_node->user_pri;
4353 if (!list_empty(&listen_node->child_listen_list)) {
4354 irdma_qhash_ctrl(iwdev, listen_node, &nfo, ipaddr, ipv4,
4355 ifup);
4356 } else if (memcmp(listen_node->loc_addr, ip_zero,
4357 ipv4 ? 4 : 16)) {
4358 if (!irdma_manage_qhash(iwdev, &nfo,
4359 IRDMA_QHASH_TYPE_TCP_SYN, op,
4360 NULL, false))
4361 listen_node->qhash_set = ifup;
4362 }
4363 }
4364 spin_unlock_irqrestore(&cm_core->listen_list_lock, flags);
4365
4366 /* disconnect any connected qp's on ifdown */
4367 if (!ifup)
4368 irdma_cm_teardown_connections(iwdev, ipaddr, &nfo, false);
4369 }
4370