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Merge tag 'trace-printf-v6.13' of git://git.kernel.org/pub/scm/linux/kernel/git/trace...
[drm/drm-misc.git] / drivers / infiniband / hw / irdma / cm.c
blobce8d821bdad8476e7d0b61e2ac7eddbafcde5e50
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 */
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 */
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 */
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 */
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 */
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 */
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 */
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 */
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 */
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 */
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 */
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 */
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 */
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 */
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, sizeof(*tcph));
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 */
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 */
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 */
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 */
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 */
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 */
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 */
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 */
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 */
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 */
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 */
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 */
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 */
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 */
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 */
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 */
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 */
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 */
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 */
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 */
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 */
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 * @ipv4: flag indicating IPv4 when true
1462 * @dst_port: listener tcp port num
1463 * @vlan_id: virtual LAN ID
1464 * @listener_state: state to match with listen node's
1465 */
1466 static struct irdma_cm_listener *
1467 irdma_find_listener(struct irdma_cm_core *cm_core, u32 *dst_addr, bool ipv4,
1468 u16 dst_port, u16 vlan_id,
1469 enum irdma_cm_listener_state listener_state)
1470 {
1471 struct irdma_cm_listener *listen_node;
1472 static const u32 ip_zero[4] = { 0, 0, 0, 0 };
1473 u32 listen_addr[4];
1474 u16 listen_port;
1475 unsigned long flags;
1476
1477 /* walk list and find cm_node associated with this session ID */
1478 spin_lock_irqsave(&cm_core->listen_list_lock, flags);
1479 list_for_each_entry (listen_node, &cm_core->listen_list, list) {
1480 memcpy(listen_addr, listen_node->loc_addr, sizeof(listen_addr));
1481 listen_port = listen_node->loc_port;
1482 if (listen_node->ipv4 != ipv4 || listen_port != dst_port ||
1483 !(listener_state & listen_node->listener_state))
1484 continue;
1485 /* compare node pair, return node handle if a match */
1486 if (!memcmp(listen_addr, ip_zero, sizeof(listen_addr)) ||
1487 (!memcmp(listen_addr, dst_addr, sizeof(listen_addr)) &&
1488 vlan_id == listen_node->vlan_id)) {
1489 refcount_inc(&listen_node->refcnt);
1490 spin_unlock_irqrestore(&cm_core->listen_list_lock,
1491 flags);
1492 trace_irdma_find_listener(listen_node);
1493 return listen_node;
1494 }
1495 }
1496 spin_unlock_irqrestore(&cm_core->listen_list_lock, flags);
1497
1498 return NULL;
1499 }
1500
1501 /**
1502 * irdma_del_multiple_qhash - Remove qhash and child listens
1503 * @iwdev: iWarp device
1504 * @cm_info: CM info for parent listen node
1505 * @cm_parent_listen_node: The parent listen node
1506 */
1507 static int irdma_del_multiple_qhash(struct irdma_device *iwdev,
1508 struct irdma_cm_info *cm_info,
1509 struct irdma_cm_listener *cm_parent_listen_node)
1510 {
1511 struct irdma_cm_listener *child_listen_node;
1512 struct list_head *pos, *tpos;
1513 unsigned long flags;
1514 int ret = -EINVAL;
1515
1516 spin_lock_irqsave(&iwdev->cm_core.listen_list_lock, flags);
1517 list_for_each_safe (pos, tpos,
1518 &cm_parent_listen_node->child_listen_list) {
1519 child_listen_node = list_entry(pos, struct irdma_cm_listener,
1520 child_listen_list);
1521 if (child_listen_node->ipv4)
1522 ibdev_dbg(&iwdev->ibdev,
1523 "CM: removing child listen for IP=%pI4, port=%d, vlan=%d\n",
1524 child_listen_node->loc_addr,
1525 child_listen_node->loc_port,
1526 child_listen_node->vlan_id);
1527 else
1528 ibdev_dbg(&iwdev->ibdev,
1529 "CM: removing child listen for IP=%pI6, port=%d, vlan=%d\n",
1530 child_listen_node->loc_addr,
1531 child_listen_node->loc_port,
1532 child_listen_node->vlan_id);
1533 trace_irdma_del_multiple_qhash(child_listen_node);
1534 list_del(pos);
1535 memcpy(cm_info->loc_addr, child_listen_node->loc_addr,
1536 sizeof(cm_info->loc_addr));
1537 cm_info->vlan_id = child_listen_node->vlan_id;
1538 if (child_listen_node->qhash_set) {
1539 ret = irdma_manage_qhash(iwdev, cm_info,
1540 IRDMA_QHASH_TYPE_TCP_SYN,
1541 IRDMA_QHASH_MANAGE_TYPE_DELETE,
1542 NULL, false);
1543 child_listen_node->qhash_set = false;
1544 } else {
1545 ret = 0;
1546 }
1547 ibdev_dbg(&iwdev->ibdev,
1548 "CM: Child listen node freed = %p\n",
1549 child_listen_node);
1550 kfree(child_listen_node);
1551 cm_parent_listen_node->cm_core->stats_listen_nodes_destroyed++;
1552 }
1553 spin_unlock_irqrestore(&iwdev->cm_core.listen_list_lock, flags);
1554
1555 return ret;
1556 }
1557
1558 static u8 irdma_iw_get_vlan_prio(u32 *loc_addr, u8 prio, bool ipv4)
1559 {
1560 struct net_device *ndev = NULL;
1561
1562 rcu_read_lock();
1563 if (ipv4) {
1564 ndev = ip_dev_find(&init_net, htonl(loc_addr[0]));
1565 } else if (IS_ENABLED(CONFIG_IPV6)) {
1566 struct net_device *ip_dev;
1567 struct in6_addr laddr6;
1568
1569 irdma_copy_ip_htonl(laddr6.in6_u.u6_addr32, loc_addr);
1570
1571 for_each_netdev_rcu (&init_net, ip_dev) {
1572 if (ipv6_chk_addr(&init_net, &laddr6, ip_dev, 1)) {
1573 ndev = ip_dev;
1574 break;
1575 }
1576 }
1577 }
1578
1579 if (!ndev)
1580 goto done;
1581 if (is_vlan_dev(ndev))
1582 prio = (vlan_dev_get_egress_qos_mask(ndev, prio) & VLAN_PRIO_MASK)
1583 >> VLAN_PRIO_SHIFT;
1584 if (ipv4)
1585 dev_put(ndev);
1586
1587 done:
1588 rcu_read_unlock();
1589
1590 return prio;
1591 }
1592
1593 /**
1594 * irdma_get_vlan_mac_ipv6 - Gets the vlan and mac
1595 * @addr: local IPv6 address
1596 * @vlan_id: vlan id for the given IPv6 address
1597 * @mac: mac address for the given IPv6 address
1598 *
1599 * Returns the vlan id and mac for an IPv6 address.
1600 */
1601 void irdma_get_vlan_mac_ipv6(u32 *addr, u16 *vlan_id, u8 *mac)
1602 {
1603 struct net_device *ip_dev = NULL;
1604 struct in6_addr laddr6;
1605
1606 if (!IS_ENABLED(CONFIG_IPV6))
1607 return;
1608
1609 irdma_copy_ip_htonl(laddr6.in6_u.u6_addr32, addr);
1610 if (vlan_id)
1611 *vlan_id = 0xFFFF; /* Match rdma_vlan_dev_vlan_id() */
1612 if (mac)
1613 eth_zero_addr(mac);
1614
1615 rcu_read_lock();
1616 for_each_netdev_rcu (&init_net, ip_dev) {
1617 if (ipv6_chk_addr(&init_net, &laddr6, ip_dev, 1)) {
1618 if (vlan_id)
1619 *vlan_id = rdma_vlan_dev_vlan_id(ip_dev);
1620 if (ip_dev->dev_addr && mac)
1621 ether_addr_copy(mac, ip_dev->dev_addr);
1622 break;
1623 }
1624 }
1625 rcu_read_unlock();
1626 }
1627
1628 /**
1629 * irdma_get_vlan_ipv4 - Returns the vlan_id for IPv4 address
1630 * @addr: local IPv4 address
1631 */
1632 u16 irdma_get_vlan_ipv4(u32 *addr)
1633 {
1634 struct net_device *netdev;
1635 u16 vlan_id = 0xFFFF;
1636
1637 netdev = ip_dev_find(&init_net, htonl(addr[0]));
1638 if (netdev) {
1639 vlan_id = rdma_vlan_dev_vlan_id(netdev);
1640 dev_put(netdev);
1641 }
1642
1643 return vlan_id;
1644 }
1645
1646 /**
1647 * irdma_add_mqh_6 - Adds multiple qhashes for IPv6
1648 * @iwdev: iWarp device
1649 * @cm_info: CM info for parent listen node
1650 * @cm_parent_listen_node: The parent listen node
1651 *
1652 * Adds a qhash and a child listen node for every IPv6 address
1653 * on the adapter and adds the associated qhash filter
1654 */
1655 static int irdma_add_mqh_6(struct irdma_device *iwdev,
1656 struct irdma_cm_info *cm_info,
1657 struct irdma_cm_listener *cm_parent_listen_node)
1658 {
1659 struct net_device *ip_dev;
1660 struct inet6_dev *idev;
1661 struct inet6_ifaddr *ifp, *tmp;
1662 struct irdma_cm_listener *child_listen_node;
1663 unsigned long flags;
1664 int ret = 0;
1665
1666 rtnl_lock();
1667 for_each_netdev(&init_net, ip_dev) {
1668 if (!(ip_dev->flags & IFF_UP))
1669 continue;
1670
1671 if (((rdma_vlan_dev_vlan_id(ip_dev) >= VLAN_N_VID) ||
1672 (rdma_vlan_dev_real_dev(ip_dev) != iwdev->netdev)) &&
1673 ip_dev != iwdev->netdev)
1674 continue;
1675
1676 idev = __in6_dev_get(ip_dev);
1677 if (!idev) {
1678 ibdev_dbg(&iwdev->ibdev, "CM: idev == NULL\n");
1679 break;
1680 }
1681 list_for_each_entry_safe (ifp, tmp, &idev->addr_list, if_list) {
1682 ibdev_dbg(&iwdev->ibdev, "CM: IP=%pI6, vlan_id=%d, MAC=%pM\n",
1683 &ifp->addr, rdma_vlan_dev_vlan_id(ip_dev),
1684 ip_dev->dev_addr);
1685 child_listen_node = kzalloc(sizeof(*child_listen_node), GFP_KERNEL);
1686 ibdev_dbg(&iwdev->ibdev, "CM: Allocating child listener %p\n",
1687 child_listen_node);
1688 if (!child_listen_node) {
1689 ibdev_dbg(&iwdev->ibdev, "CM: listener memory allocation\n");
1690 ret = -ENOMEM;
1691 goto exit;
1692 }
1693
1694 cm_info->vlan_id = rdma_vlan_dev_vlan_id(ip_dev);
1695 cm_parent_listen_node->vlan_id = cm_info->vlan_id;
1696 memcpy(child_listen_node, cm_parent_listen_node,
1697 sizeof(*child_listen_node));
1698 irdma_copy_ip_ntohl(child_listen_node->loc_addr,
1699 ifp->addr.in6_u.u6_addr32);
1700 memcpy(cm_info->loc_addr, child_listen_node->loc_addr,
1701 sizeof(cm_info->loc_addr));
1702 if (!iwdev->vsi.dscp_mode)
1703 cm_info->user_pri =
1704 irdma_iw_get_vlan_prio(child_listen_node->loc_addr,
1705 cm_info->user_pri,
1706 false);
1707
1708 ret = irdma_manage_qhash(iwdev, cm_info,
1709 IRDMA_QHASH_TYPE_TCP_SYN,
1710 IRDMA_QHASH_MANAGE_TYPE_ADD,
1711 NULL, true);
1712 if (ret) {
1713 kfree(child_listen_node);
1714 continue;
1715 }
1716
1717 trace_irdma_add_mqh_6(iwdev, child_listen_node,
1718 ip_dev->dev_addr);
1719
1720 child_listen_node->qhash_set = true;
1721 spin_lock_irqsave(&iwdev->cm_core.listen_list_lock, flags);
1722 list_add(&child_listen_node->child_listen_list,
1723 &cm_parent_listen_node->child_listen_list);
1724 spin_unlock_irqrestore(&iwdev->cm_core.listen_list_lock, flags);
1725 cm_parent_listen_node->cm_core->stats_listen_nodes_created++;
1726 }
1727 }
1728 exit:
1729 rtnl_unlock();
1730
1731 return ret;
1732 }
1733
1734 /**
1735 * irdma_add_mqh_4 - Adds multiple qhashes for IPv4
1736 * @iwdev: iWarp device
1737 * @cm_info: CM info for parent listen node
1738 * @cm_parent_listen_node: The parent listen node
1739 *
1740 * Adds a qhash and a child listen node for every IPv4 address
1741 * on the adapter and adds the associated qhash filter
1742 */
1743 static int irdma_add_mqh_4(struct irdma_device *iwdev,
1744 struct irdma_cm_info *cm_info,
1745 struct irdma_cm_listener *cm_parent_listen_node)
1746 {
1747 struct net_device *ip_dev;
1748 struct in_device *idev;
1749 struct irdma_cm_listener *child_listen_node;
1750 unsigned long flags;
1751 const struct in_ifaddr *ifa;
1752 int ret = 0;
1753
1754 rtnl_lock();
1755 for_each_netdev(&init_net, ip_dev) {
1756 if (!(ip_dev->flags & IFF_UP))
1757 continue;
1758
1759 if (((rdma_vlan_dev_vlan_id(ip_dev) >= VLAN_N_VID) ||
1760 (rdma_vlan_dev_real_dev(ip_dev) != iwdev->netdev)) &&
1761 ip_dev != iwdev->netdev)
1762 continue;
1763
1764 idev = in_dev_get(ip_dev);
1765 if (!idev)
1766 continue;
1767
1768 in_dev_for_each_ifa_rtnl(ifa, idev) {
1769 ibdev_dbg(&iwdev->ibdev,
1770 "CM: Allocating child CM Listener forIP=%pI4, vlan_id=%d, MAC=%pM\n",
1771 &ifa->ifa_address, rdma_vlan_dev_vlan_id(ip_dev),
1772 ip_dev->dev_addr);
1773 child_listen_node = kzalloc(sizeof(*child_listen_node), GFP_KERNEL);
1774 cm_parent_listen_node->cm_core->stats_listen_nodes_created++;
1775 ibdev_dbg(&iwdev->ibdev, "CM: Allocating child listener %p\n",
1776 child_listen_node);
1777 if (!child_listen_node) {
1778 ibdev_dbg(&iwdev->ibdev, "CM: listener memory allocation\n");
1779 in_dev_put(idev);
1780 ret = -ENOMEM;
1781 goto exit;
1782 }
1783
1784 cm_info->vlan_id = rdma_vlan_dev_vlan_id(ip_dev);
1785 cm_parent_listen_node->vlan_id = cm_info->vlan_id;
1786 memcpy(child_listen_node, cm_parent_listen_node,
1787 sizeof(*child_listen_node));
1788 child_listen_node->loc_addr[0] =
1789 ntohl(ifa->ifa_address);
1790 memcpy(cm_info->loc_addr, child_listen_node->loc_addr,
1791 sizeof(cm_info->loc_addr));
1792 if (!iwdev->vsi.dscp_mode)
1793 cm_info->user_pri =
1794 irdma_iw_get_vlan_prio(child_listen_node->loc_addr,
1795 cm_info->user_pri,
1796 true);
1797 ret = irdma_manage_qhash(iwdev, cm_info,
1798 IRDMA_QHASH_TYPE_TCP_SYN,
1799 IRDMA_QHASH_MANAGE_TYPE_ADD,
1800 NULL, true);
1801 if (ret) {
1802 kfree(child_listen_node);
1803 cm_parent_listen_node->cm_core
1804 ->stats_listen_nodes_created--;
1805 continue;
1806 }
1807
1808 trace_irdma_add_mqh_4(iwdev, child_listen_node,
1809 ip_dev->dev_addr);
1810
1811 child_listen_node->qhash_set = true;
1812 spin_lock_irqsave(&iwdev->cm_core.listen_list_lock,
1813 flags);
1814 list_add(&child_listen_node->child_listen_list,
1815 &cm_parent_listen_node->child_listen_list);
1816 spin_unlock_irqrestore(&iwdev->cm_core.listen_list_lock, flags);
1817 }
1818 in_dev_put(idev);
1819 }
1820 exit:
1821 rtnl_unlock();
1822
1823 return ret;
1824 }
1825
1826 /**
1827 * irdma_add_mqh - Adds multiple qhashes
1828 * @iwdev: iWarp device
1829 * @cm_info: CM info for parent listen node
1830 * @cm_listen_node: The parent listen node
1831 */
1832 static int irdma_add_mqh(struct irdma_device *iwdev,
1833 struct irdma_cm_info *cm_info,
1834 struct irdma_cm_listener *cm_listen_node)
1835 {
1836 if (cm_info->ipv4)
1837 return irdma_add_mqh_4(iwdev, cm_info, cm_listen_node);
1838 else
1839 return irdma_add_mqh_6(iwdev, cm_info, cm_listen_node);
1840 }
1841
1842 /**
1843 * irdma_reset_list_prep - add connection nodes slated for reset to list
1844 * @cm_core: cm's core
1845 * @listener: pointer to listener node
1846 * @reset_list: a list to which cm_node will be selected
1847 */
1848 static void irdma_reset_list_prep(struct irdma_cm_core *cm_core,
1849 struct irdma_cm_listener *listener,
1850 struct list_head *reset_list)
1851 {
1852 struct irdma_cm_node *cm_node;
1853 int bkt;
1854
1855 hash_for_each_rcu(cm_core->cm_hash_tbl, bkt, cm_node, list) {
1856 if (cm_node->listener == listener &&
1857 !cm_node->accelerated &&
1858 refcount_inc_not_zero(&cm_node->refcnt))
1859 list_add(&cm_node->reset_entry, reset_list);
1860 }
1861 }
1862
1863 /**
1864 * irdma_dec_refcnt_listen - delete listener and associated cm nodes
1865 * @cm_core: cm's core
1866 * @listener: pointer to listener node
1867 * @free_hanging_nodes: to free associated cm_nodes
1868 * @apbvt_del: flag to delete the apbvt
1869 */
1870 static int irdma_dec_refcnt_listen(struct irdma_cm_core *cm_core,
1871 struct irdma_cm_listener *listener,
1872 int free_hanging_nodes, bool apbvt_del)
1873 {
1874 int err;
1875 struct list_head *list_pos;
1876 struct list_head *list_temp;
1877 struct irdma_cm_node *cm_node;
1878 struct list_head reset_list;
1879 struct irdma_cm_info nfo;
1880 enum irdma_cm_node_state old_state;
1881 unsigned long flags;
1882
1883 trace_irdma_dec_refcnt_listen(listener, __builtin_return_address(0));
1884 /* free non-accelerated child nodes for this listener */
1885 INIT_LIST_HEAD(&reset_list);
1886 if (free_hanging_nodes) {
1887 rcu_read_lock();
1888 irdma_reset_list_prep(cm_core, listener, &reset_list);
1889 rcu_read_unlock();
1890 }
1891
1892 list_for_each_safe (list_pos, list_temp, &reset_list) {
1893 cm_node = container_of(list_pos, struct irdma_cm_node,
1894 reset_entry);
1895 if (cm_node->state >= IRDMA_CM_STATE_FIN_WAIT1) {
1896 irdma_rem_ref_cm_node(cm_node);
1897 continue;
1898 }
1899
1900 irdma_cleanup_retrans_entry(cm_node);
1901 err = irdma_send_reset(cm_node);
1902 if (err) {
1903 cm_node->state = IRDMA_CM_STATE_CLOSED;
1904 ibdev_dbg(&cm_node->iwdev->ibdev,
1905 "CM: send reset failed\n");
1906 } else {
1907 old_state = cm_node->state;
1908 cm_node->state = IRDMA_CM_STATE_LISTENER_DESTROYED;
1909 if (old_state != IRDMA_CM_STATE_MPAREQ_RCVD)
1910 irdma_rem_ref_cm_node(cm_node);
1911 }
1912 }
1913
1914 if (refcount_dec_and_test(&listener->refcnt)) {
1915 spin_lock_irqsave(&cm_core->listen_list_lock, flags);
1916 list_del(&listener->list);
1917 spin_unlock_irqrestore(&cm_core->listen_list_lock, flags);
1918
1919 if (apbvt_del)
1920 irdma_del_apbvt(listener->iwdev,
1921 listener->apbvt_entry);
1922 memcpy(nfo.loc_addr, listener->loc_addr, sizeof(nfo.loc_addr));
1923 nfo.loc_port = listener->loc_port;
1924 nfo.ipv4 = listener->ipv4;
1925 nfo.vlan_id = listener->vlan_id;
1926 nfo.user_pri = listener->user_pri;
1927 nfo.qh_qpid = listener->iwdev->vsi.ilq->qp_id;
1928
1929 if (!list_empty(&listener->child_listen_list)) {
1930 irdma_del_multiple_qhash(listener->iwdev, &nfo,
1931 listener);
1932 } else {
1933 if (listener->qhash_set)
1934 irdma_manage_qhash(listener->iwdev,
1935 &nfo,
1936 IRDMA_QHASH_TYPE_TCP_SYN,
1937 IRDMA_QHASH_MANAGE_TYPE_DELETE,
1938 NULL, false);
1939 }
1940
1941 cm_core->stats_listen_destroyed++;
1942 cm_core->stats_listen_nodes_destroyed++;
1943 ibdev_dbg(&listener->iwdev->ibdev,
1944 "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",
1945 listener->loc_port, listener->loc_addr, listener,
1946 listener->cm_id, listener->qhash_set,
1947 listener->vlan_id, apbvt_del);
1948 kfree(listener);
1949 listener = NULL;
1950 return 0;
1951 }
1952
1953 return -EINVAL;
1954 }
1955
1956 /**
1957 * irdma_cm_del_listen - delete a listener
1958 * @cm_core: cm's core
1959 * @listener: passive connection's listener
1960 * @apbvt_del: flag to delete apbvt
1961 */
1962 static int irdma_cm_del_listen(struct irdma_cm_core *cm_core,
1963 struct irdma_cm_listener *listener,
1964 bool apbvt_del)
1965 {
1966 listener->listener_state = IRDMA_CM_LISTENER_PASSIVE_STATE;
1967 listener->cm_id = NULL;
1968
1969 return irdma_dec_refcnt_listen(cm_core, listener, 1, apbvt_del);
1970 }
1971
1972 /**
1973 * irdma_addr_resolve_neigh - resolve neighbor address
1974 * @iwdev: iwarp device structure
1975 * @src_ip: local ip address
1976 * @dst_ip: remote ip address
1977 * @arpindex: if there is an arp entry
1978 */
1979 static int irdma_addr_resolve_neigh(struct irdma_device *iwdev, u32 src_ip,
1980 u32 dst_ip, int arpindex)
1981 {
1982 struct rtable *rt;
1983 struct neighbour *neigh;
1984 int rc = arpindex;
1985 __be32 dst_ipaddr = htonl(dst_ip);
1986 __be32 src_ipaddr = htonl(src_ip);
1987
1988 rt = ip_route_output(&init_net, dst_ipaddr, src_ipaddr, 0, 0,
1989 RT_SCOPE_UNIVERSE);
1990 if (IS_ERR(rt)) {
1991 ibdev_dbg(&iwdev->ibdev, "CM: ip_route_output fail\n");
1992 return -EINVAL;
1993 }
1994
1995 neigh = dst_neigh_lookup(&rt->dst, &dst_ipaddr);
1996 if (!neigh)
1997 goto exit;
1998
1999 if (neigh->nud_state & NUD_VALID)
2000 rc = irdma_add_arp(iwdev->rf, &dst_ip, true, neigh->ha);
2001 else
2002 neigh_event_send(neigh, NULL);
2003 if (neigh)
2004 neigh_release(neigh);
2005 exit:
2006 ip_rt_put(rt);
2007
2008 return rc;
2009 }
2010
2011 /**
2012 * irdma_get_dst_ipv6 - get destination cache entry via ipv6 lookup
2013 * @src_addr: local ipv6 sock address
2014 * @dst_addr: destination ipv6 sock address
2015 */
2016 static struct dst_entry *irdma_get_dst_ipv6(struct sockaddr_in6 *src_addr,
2017 struct sockaddr_in6 *dst_addr)
2018 {
2019 struct dst_entry *dst = NULL;
2020
2021 if ((IS_ENABLED(CONFIG_IPV6))) {
2022 struct flowi6 fl6 = {};
2023
2024 fl6.daddr = dst_addr->sin6_addr;
2025 fl6.saddr = src_addr->sin6_addr;
2026 if (ipv6_addr_type(&fl6.daddr) & IPV6_ADDR_LINKLOCAL)
2027 fl6.flowi6_oif = dst_addr->sin6_scope_id;
2028
2029 dst = ip6_route_output(&init_net, NULL, &fl6);
2030 }
2031
2032 return dst;
2033 }
2034
2035 /**
2036 * irdma_addr_resolve_neigh_ipv6 - resolve neighbor ipv6 address
2037 * @iwdev: iwarp device structure
2038 * @src: local ip address
2039 * @dest: remote ip address
2040 * @arpindex: if there is an arp entry
2041 */
2042 static int irdma_addr_resolve_neigh_ipv6(struct irdma_device *iwdev, u32 *src,
2043 u32 *dest, int arpindex)
2044 {
2045 struct neighbour *neigh;
2046 int rc = arpindex;
2047 struct dst_entry *dst;
2048 struct sockaddr_in6 dst_addr = {};
2049 struct sockaddr_in6 src_addr = {};
2050
2051 dst_addr.sin6_family = AF_INET6;
2052 irdma_copy_ip_htonl(dst_addr.sin6_addr.in6_u.u6_addr32, dest);
2053 src_addr.sin6_family = AF_INET6;
2054 irdma_copy_ip_htonl(src_addr.sin6_addr.in6_u.u6_addr32, src);
2055 dst = irdma_get_dst_ipv6(&src_addr, &dst_addr);
2056 if (!dst || dst->error) {
2057 if (dst) {
2058 dst_release(dst);
2059 ibdev_dbg(&iwdev->ibdev,
2060 "CM: ip6_route_output returned dst->error = %d\n",
2061 dst->error);
2062 }
2063 return -EINVAL;
2064 }
2065
2066 neigh = dst_neigh_lookup(dst, dst_addr.sin6_addr.in6_u.u6_addr32);
2067 if (!neigh)
2068 goto exit;
2069
2070 ibdev_dbg(&iwdev->ibdev, "CM: dst_neigh_lookup MAC=%pM\n",
2071 neigh->ha);
2072
2073 trace_irdma_addr_resolve(iwdev, neigh->ha);
2074
2075 if (neigh->nud_state & NUD_VALID)
2076 rc = irdma_add_arp(iwdev->rf, dest, false, neigh->ha);
2077 else
2078 neigh_event_send(neigh, NULL);
2079 if (neigh)
2080 neigh_release(neigh);
2081 exit:
2082 dst_release(dst);
2083
2084 return rc;
2085 }
2086
2087 /**
2088 * irdma_find_node - find a cm node that matches the reference cm node
2089 * @cm_core: cm's core
2090 * @rem_port: remote tcp port num
2091 * @rem_addr: remote ip addr
2092 * @loc_port: local tcp port num
2093 * @loc_addr: local ip addr
2094 * @vlan_id: local VLAN ID
2095 */
2096 struct irdma_cm_node *irdma_find_node(struct irdma_cm_core *cm_core,
2097 u16 rem_port, u32 *rem_addr, u16 loc_port,
2098 u32 *loc_addr, u16 vlan_id)
2099 {
2100 struct irdma_cm_node *cm_node;
2101 u32 key = (rem_port << 16) | loc_port;
2102
2103 rcu_read_lock();
2104 hash_for_each_possible_rcu(cm_core->cm_hash_tbl, cm_node, list, key) {
2105 if (cm_node->vlan_id == vlan_id &&
2106 cm_node->loc_port == loc_port && cm_node->rem_port == rem_port &&
2107 !memcmp(cm_node->loc_addr, loc_addr, sizeof(cm_node->loc_addr)) &&
2108 !memcmp(cm_node->rem_addr, rem_addr, sizeof(cm_node->rem_addr))) {
2109 if (!refcount_inc_not_zero(&cm_node->refcnt))
2110 goto exit;
2111 rcu_read_unlock();
2112 trace_irdma_find_node(cm_node, 0, NULL);
2113 return cm_node;
2114 }
2115 }
2116
2117 exit:
2118 rcu_read_unlock();
2119
2120 /* no owner node */
2121 return NULL;
2122 }
2123
2124 /**
2125 * irdma_add_hte_node - add a cm node to the hash table
2126 * @cm_core: cm's core
2127 * @cm_node: connection's node
2128 */
2129 static void irdma_add_hte_node(struct irdma_cm_core *cm_core,
2130 struct irdma_cm_node *cm_node)
2131 {
2132 unsigned long flags;
2133 u32 key = (cm_node->rem_port << 16) | cm_node->loc_port;
2134
2135 spin_lock_irqsave(&cm_core->ht_lock, flags);
2136 hash_add_rcu(cm_core->cm_hash_tbl, &cm_node->list, key);
2137 spin_unlock_irqrestore(&cm_core->ht_lock, flags);
2138 }
2139
2140 /**
2141 * irdma_ipv4_is_lpb - check if loopback
2142 * @loc_addr: local addr to compare
2143 * @rem_addr: remote address
2144 */
2145 bool irdma_ipv4_is_lpb(u32 loc_addr, u32 rem_addr)
2146 {
2147 return ipv4_is_loopback(htonl(rem_addr)) || (loc_addr == rem_addr);
2148 }
2149
2150 /**
2151 * irdma_ipv6_is_lpb - check if loopback
2152 * @loc_addr: local addr to compare
2153 * @rem_addr: remote address
2154 */
2155 bool irdma_ipv6_is_lpb(u32 *loc_addr, u32 *rem_addr)
2156 {
2157 struct in6_addr raddr6;
2158
2159 irdma_copy_ip_htonl(raddr6.in6_u.u6_addr32, rem_addr);
2160
2161 return !memcmp(loc_addr, rem_addr, 16) || ipv6_addr_loopback(&raddr6);
2162 }
2163
2164 /**
2165 * irdma_cm_create_ah - create a cm address handle
2166 * @cm_node: The connection manager node to create AH for
2167 * @wait: Provides option to wait for ah creation or not
2168 */
2169 static int irdma_cm_create_ah(struct irdma_cm_node *cm_node, bool wait)
2170 {
2171 struct irdma_ah_info ah_info = {};
2172 struct irdma_device *iwdev = cm_node->iwdev;
2173
2174 ether_addr_copy(ah_info.mac_addr, iwdev->netdev->dev_addr);
2175
2176 ah_info.hop_ttl = 0x40;
2177 ah_info.tc_tos = cm_node->tos;
2178 ah_info.vsi = &iwdev->vsi;
2179
2180 if (cm_node->ipv4) {
2181 ah_info.ipv4_valid = true;
2182 ah_info.dest_ip_addr[0] = cm_node->rem_addr[0];
2183 ah_info.src_ip_addr[0] = cm_node->loc_addr[0];
2184 ah_info.do_lpbk = irdma_ipv4_is_lpb(ah_info.src_ip_addr[0],
2185 ah_info.dest_ip_addr[0]);
2186 } else {
2187 memcpy(ah_info.dest_ip_addr, cm_node->rem_addr,
2188 sizeof(ah_info.dest_ip_addr));
2189 memcpy(ah_info.src_ip_addr, cm_node->loc_addr,
2190 sizeof(ah_info.src_ip_addr));
2191 ah_info.do_lpbk = irdma_ipv6_is_lpb(ah_info.src_ip_addr,
2192 ah_info.dest_ip_addr);
2193 }
2194
2195 ah_info.vlan_tag = cm_node->vlan_id;
2196 if (cm_node->vlan_id < VLAN_N_VID) {
2197 ah_info.insert_vlan_tag = 1;
2198 ah_info.vlan_tag |= cm_node->user_pri << VLAN_PRIO_SHIFT;
2199 }
2200
2201 ah_info.dst_arpindex =
2202 irdma_arp_table(iwdev->rf, ah_info.dest_ip_addr,
2203 ah_info.ipv4_valid, NULL, IRDMA_ARP_RESOLVE);
2204
2205 if (irdma_puda_create_ah(&iwdev->rf->sc_dev, &ah_info, wait,
2206 IRDMA_PUDA_RSRC_TYPE_ILQ, cm_node,
2207 &cm_node->ah))
2208 return -ENOMEM;
2209
2210 trace_irdma_create_ah(cm_node);
2211 return 0;
2212 }
2213
2214 /**
2215 * irdma_cm_free_ah - free a cm address handle
2216 * @cm_node: The connection manager node to create AH for
2217 */
2218 static void irdma_cm_free_ah(struct irdma_cm_node *cm_node)
2219 {
2220 struct irdma_device *iwdev = cm_node->iwdev;
2221
2222 trace_irdma_cm_free_ah(cm_node);
2223 irdma_puda_free_ah(&iwdev->rf->sc_dev, cm_node->ah);
2224 cm_node->ah = NULL;
2225 }
2226
2227 /**
2228 * irdma_make_cm_node - create a new instance of a cm node
2229 * @cm_core: cm's core
2230 * @iwdev: iwarp device structure
2231 * @cm_info: quad info for connection
2232 * @listener: passive connection's listener
2233 */
2234 static struct irdma_cm_node *
2235 irdma_make_cm_node(struct irdma_cm_core *cm_core, struct irdma_device *iwdev,
2236 struct irdma_cm_info *cm_info,
2237 struct irdma_cm_listener *listener)
2238 {
2239 struct irdma_cm_node *cm_node;
2240 int oldarpindex;
2241 int arpindex;
2242 struct net_device *netdev = iwdev->netdev;
2243
2244 /* create an hte and cm_node for this instance */
2245 cm_node = kzalloc(sizeof(*cm_node), GFP_ATOMIC);
2246 if (!cm_node)
2247 return NULL;
2248
2249 /* set our node specific transport info */
2250 cm_node->ipv4 = cm_info->ipv4;
2251 cm_node->vlan_id = cm_info->vlan_id;
2252 if (cm_node->vlan_id >= VLAN_N_VID && iwdev->dcb_vlan_mode)
2253 cm_node->vlan_id = 0;
2254 cm_node->tos = cm_info->tos;
2255 cm_node->user_pri = cm_info->user_pri;
2256 if (listener) {
2257 if (listener->tos != cm_info->tos)
2258 ibdev_warn(&iwdev->ibdev,
2259 "application TOS[%d] and remote client TOS[%d] mismatch\n",
2260 listener->tos, cm_info->tos);
2261 if (iwdev->vsi.dscp_mode) {
2262 cm_node->user_pri = listener->user_pri;
2263 } else {
2264 cm_node->tos = max(listener->tos, cm_info->tos);
2265 cm_node->user_pri = rt_tos2priority(cm_node->tos);
2266 cm_node->user_pri =
2267 irdma_iw_get_vlan_prio(cm_info->loc_addr,
2268 cm_node->user_pri,
2269 cm_info->ipv4);
2270 }
2271 ibdev_dbg(&iwdev->ibdev,
2272 "DCB: listener: TOS:[%d] UP:[%d]\n", cm_node->tos,
2273 cm_node->user_pri);
2274 trace_irdma_listener_tos(iwdev, cm_node->tos,
2275 cm_node->user_pri);
2276 }
2277 memcpy(cm_node->loc_addr, cm_info->loc_addr, sizeof(cm_node->loc_addr));
2278 memcpy(cm_node->rem_addr, cm_info->rem_addr, sizeof(cm_node->rem_addr));
2279 cm_node->loc_port = cm_info->loc_port;
2280 cm_node->rem_port = cm_info->rem_port;
2281
2282 cm_node->mpa_frame_rev = IRDMA_CM_DEFAULT_MPA_VER;
2283 cm_node->send_rdma0_op = SEND_RDMA_READ_ZERO;
2284 cm_node->iwdev = iwdev;
2285 cm_node->dev = &iwdev->rf->sc_dev;
2286
2287 cm_node->ird_size = cm_node->dev->hw_attrs.max_hw_ird;
2288 cm_node->ord_size = cm_node->dev->hw_attrs.max_hw_ord;
2289
2290 cm_node->listener = listener;
2291 cm_node->cm_id = cm_info->cm_id;
2292 ether_addr_copy(cm_node->loc_mac, netdev->dev_addr);
2293 spin_lock_init(&cm_node->retrans_list_lock);
2294 cm_node->ack_rcvd = false;
2295
2296 init_completion(&cm_node->establish_comp);
2297 refcount_set(&cm_node->refcnt, 1);
2298 /* associate our parent CM core */
2299 cm_node->cm_core = cm_core;
2300 cm_node->tcp_cntxt.loc_id = IRDMA_CM_DEFAULT_LOCAL_ID;
2301 cm_node->tcp_cntxt.rcv_wscale = iwdev->rcv_wscale;
2302 cm_node->tcp_cntxt.rcv_wnd = iwdev->rcv_wnd >> cm_node->tcp_cntxt.rcv_wscale;
2303 if (cm_node->ipv4) {
2304 cm_node->tcp_cntxt.loc_seq_num = secure_tcp_seq(htonl(cm_node->loc_addr[0]),
2305 htonl(cm_node->rem_addr[0]),
2306 htons(cm_node->loc_port),
2307 htons(cm_node->rem_port));
2308 cm_node->tcp_cntxt.mss = iwdev->vsi.mtu - IRDMA_MTU_TO_MSS_IPV4;
2309 } else if (IS_ENABLED(CONFIG_IPV6)) {
2310 __be32 loc[4] = {
2311 htonl(cm_node->loc_addr[0]), htonl(cm_node->loc_addr[1]),
2312 htonl(cm_node->loc_addr[2]), htonl(cm_node->loc_addr[3])
2313 };
2314 __be32 rem[4] = {
2315 htonl(cm_node->rem_addr[0]), htonl(cm_node->rem_addr[1]),
2316 htonl(cm_node->rem_addr[2]), htonl(cm_node->rem_addr[3])
2317 };
2318 cm_node->tcp_cntxt.loc_seq_num = secure_tcpv6_seq(loc, rem,
2319 htons(cm_node->loc_port),
2320 htons(cm_node->rem_port));
2321 cm_node->tcp_cntxt.mss = iwdev->vsi.mtu - IRDMA_MTU_TO_MSS_IPV6;
2322 }
2323
2324 if ((cm_node->ipv4 &&
2325 irdma_ipv4_is_lpb(cm_node->loc_addr[0], cm_node->rem_addr[0])) ||
2326 (!cm_node->ipv4 &&
2327 irdma_ipv6_is_lpb(cm_node->loc_addr, cm_node->rem_addr))) {
2328 cm_node->do_lpb = true;
2329 arpindex = irdma_arp_table(iwdev->rf, cm_node->rem_addr,
2330 cm_node->ipv4, NULL,
2331 IRDMA_ARP_RESOLVE);
2332 } else {
2333 oldarpindex = irdma_arp_table(iwdev->rf, cm_node->rem_addr,
2334 cm_node->ipv4, NULL,
2335 IRDMA_ARP_RESOLVE);
2336 if (cm_node->ipv4)
2337 arpindex = irdma_addr_resolve_neigh(iwdev,
2338 cm_info->loc_addr[0],
2339 cm_info->rem_addr[0],
2340 oldarpindex);
2341 else if (IS_ENABLED(CONFIG_IPV6))
2342 arpindex = irdma_addr_resolve_neigh_ipv6(iwdev,
2343 cm_info->loc_addr,
2344 cm_info->rem_addr,
2345 oldarpindex);
2346 else
2347 arpindex = -EINVAL;
2348 }
2349
2350 if (arpindex < 0)
2351 goto err;
2352
2353 ether_addr_copy(cm_node->rem_mac,
2354 iwdev->rf->arp_table[arpindex].mac_addr);
2355 irdma_add_hte_node(cm_core, cm_node);
2356 cm_core->stats_nodes_created++;
2357 return cm_node;
2358
2359 err:
2360 kfree(cm_node);
2361
2362 return NULL;
2363 }
2364
2365 static void irdma_destroy_connection(struct irdma_cm_node *cm_node)
2366 {
2367 struct irdma_cm_core *cm_core = cm_node->cm_core;
2368 struct irdma_qp *iwqp;
2369 struct irdma_cm_info nfo;
2370
2371 /* if the node is destroyed before connection was accelerated */
2372 if (!cm_node->accelerated && cm_node->accept_pend) {
2373 ibdev_dbg(&cm_node->iwdev->ibdev,
2374 "CM: node destroyed before established\n");
2375 atomic_dec(&cm_node->listener->pend_accepts_cnt);
2376 }
2377 if (cm_node->close_entry)
2378 irdma_handle_close_entry(cm_node, 0);
2379 if (cm_node->listener) {
2380 irdma_dec_refcnt_listen(cm_core, cm_node->listener, 0, true);
2381 } else {
2382 if (cm_node->apbvt_set) {
2383 irdma_del_apbvt(cm_node->iwdev, cm_node->apbvt_entry);
2384 cm_node->apbvt_set = 0;
2385 }
2386 irdma_get_addr_info(cm_node, &nfo);
2387 if (cm_node->qhash_set) {
2388 nfo.qh_qpid = cm_node->iwdev->vsi.ilq->qp_id;
2389 irdma_manage_qhash(cm_node->iwdev, &nfo,
2390 IRDMA_QHASH_TYPE_TCP_ESTABLISHED,
2391 IRDMA_QHASH_MANAGE_TYPE_DELETE, NULL,
2392 false);
2393 cm_node->qhash_set = 0;
2394 }
2395 }
2396
2397 iwqp = cm_node->iwqp;
2398 if (iwqp) {
2399 cm_node->cm_id->rem_ref(cm_node->cm_id);
2400 cm_node->cm_id = NULL;
2401 iwqp->cm_id = NULL;
2402 irdma_qp_rem_ref(&iwqp->ibqp);
2403 cm_node->iwqp = NULL;
2404 } else if (cm_node->qhash_set) {
2405 irdma_get_addr_info(cm_node, &nfo);
2406 nfo.qh_qpid = cm_node->iwdev->vsi.ilq->qp_id;
2407 irdma_manage_qhash(cm_node->iwdev, &nfo,
2408 IRDMA_QHASH_TYPE_TCP_ESTABLISHED,
2409 IRDMA_QHASH_MANAGE_TYPE_DELETE, NULL, false);
2410 cm_node->qhash_set = 0;
2411 }
2412
2413 cm_core->cm_free_ah(cm_node);
2414 }
2415
2416 /**
2417 * irdma_rem_ref_cm_node - destroy an instance of a cm node
2418 * @cm_node: connection's node
2419 */
2420 void irdma_rem_ref_cm_node(struct irdma_cm_node *cm_node)
2421 {
2422 struct irdma_cm_core *cm_core = cm_node->cm_core;
2423 unsigned long flags;
2424
2425 trace_irdma_rem_ref_cm_node(cm_node, 0, __builtin_return_address(0));
2426 spin_lock_irqsave(&cm_core->ht_lock, flags);
2427
2428 if (!refcount_dec_and_test(&cm_node->refcnt)) {
2429 spin_unlock_irqrestore(&cm_core->ht_lock, flags);
2430 return;
2431 }
2432 if (cm_node->iwqp) {
2433 cm_node->iwqp->cm_node = NULL;
2434 cm_node->iwqp->cm_id = NULL;
2435 }
2436 hash_del_rcu(&cm_node->list);
2437 cm_node->cm_core->stats_nodes_destroyed++;
2438
2439 spin_unlock_irqrestore(&cm_core->ht_lock, flags);
2440
2441 irdma_destroy_connection(cm_node);
2442
2443 kfree_rcu(cm_node, rcu_head);
2444 }
2445
2446 /**
2447 * irdma_handle_fin_pkt - FIN packet received
2448 * @cm_node: connection's node
2449 */
2450 static void irdma_handle_fin_pkt(struct irdma_cm_node *cm_node)
2451 {
2452 switch (cm_node->state) {
2453 case IRDMA_CM_STATE_SYN_RCVD:
2454 case IRDMA_CM_STATE_SYN_SENT:
2455 case IRDMA_CM_STATE_ESTABLISHED:
2456 case IRDMA_CM_STATE_MPAREJ_RCVD:
2457 cm_node->tcp_cntxt.rcv_nxt++;
2458 irdma_cleanup_retrans_entry(cm_node);
2459 cm_node->state = IRDMA_CM_STATE_LAST_ACK;
2460 irdma_send_fin(cm_node);
2461 break;
2462 case IRDMA_CM_STATE_MPAREQ_SENT:
2463 irdma_create_event(cm_node, IRDMA_CM_EVENT_ABORTED);
2464 cm_node->tcp_cntxt.rcv_nxt++;
2465 irdma_cleanup_retrans_entry(cm_node);
2466 cm_node->state = IRDMA_CM_STATE_CLOSED;
2467 refcount_inc(&cm_node->refcnt);
2468 irdma_send_reset(cm_node);
2469 break;
2470 case IRDMA_CM_STATE_FIN_WAIT1:
2471 cm_node->tcp_cntxt.rcv_nxt++;
2472 irdma_cleanup_retrans_entry(cm_node);
2473 cm_node->state = IRDMA_CM_STATE_CLOSING;
2474 irdma_send_ack(cm_node);
2475 /*
2476 * Wait for ACK as this is simultaneous close.
2477 * After we receive ACK, do not send anything.
2478 * Just rm the node.
2479 */
2480 break;
2481 case IRDMA_CM_STATE_FIN_WAIT2:
2482 cm_node->tcp_cntxt.rcv_nxt++;
2483 irdma_cleanup_retrans_entry(cm_node);
2484 cm_node->state = IRDMA_CM_STATE_TIME_WAIT;
2485 irdma_send_ack(cm_node);
2486 irdma_schedule_cm_timer(cm_node, NULL, IRDMA_TIMER_TYPE_CLOSE,
2487 1, 0);
2488 break;
2489 case IRDMA_CM_STATE_TIME_WAIT:
2490 cm_node->tcp_cntxt.rcv_nxt++;
2491 irdma_cleanup_retrans_entry(cm_node);
2492 cm_node->state = IRDMA_CM_STATE_CLOSED;
2493 irdma_rem_ref_cm_node(cm_node);
2494 break;
2495 case IRDMA_CM_STATE_OFFLOADED:
2496 default:
2497 ibdev_dbg(&cm_node->iwdev->ibdev,
2498 "CM: bad state node state = %d\n", cm_node->state);
2499 break;
2500 }
2501 }
2502
2503 /**
2504 * irdma_handle_rst_pkt - process received RST packet
2505 * @cm_node: connection's node
2506 * @rbuf: receive buffer
2507 */
2508 static void irdma_handle_rst_pkt(struct irdma_cm_node *cm_node,
2509 struct irdma_puda_buf *rbuf)
2510 {
2511 ibdev_dbg(&cm_node->iwdev->ibdev,
2512 "CM: caller: %pS cm_node=%p state=%d rem_port=0x%04x loc_port=0x%04x rem_addr=%pI4 loc_addr=%pI4\n",
2513 __builtin_return_address(0), cm_node, cm_node->state,
2514 cm_node->rem_port, cm_node->loc_port, cm_node->rem_addr,
2515 cm_node->loc_addr);
2516
2517 irdma_cleanup_retrans_entry(cm_node);
2518 switch (cm_node->state) {
2519 case IRDMA_CM_STATE_SYN_SENT:
2520 case IRDMA_CM_STATE_MPAREQ_SENT:
2521 switch (cm_node->mpa_frame_rev) {
2522 case IETF_MPA_V2:
2523 /* Drop down to MPA_V1*/
2524 cm_node->mpa_frame_rev = IETF_MPA_V1;
2525 /* send a syn and goto syn sent state */
2526 cm_node->state = IRDMA_CM_STATE_SYN_SENT;
2527 if (irdma_send_syn(cm_node, 0))
2528 irdma_active_open_err(cm_node, false);
2529 break;
2530 case IETF_MPA_V1:
2531 default:
2532 irdma_active_open_err(cm_node, false);
2533 break;
2534 }
2535 break;
2536 case IRDMA_CM_STATE_MPAREQ_RCVD:
2537 atomic_inc(&cm_node->passive_state);
2538 break;
2539 case IRDMA_CM_STATE_ESTABLISHED:
2540 case IRDMA_CM_STATE_SYN_RCVD:
2541 case IRDMA_CM_STATE_LISTENING:
2542 irdma_passive_open_err(cm_node, false);
2543 break;
2544 case IRDMA_CM_STATE_OFFLOADED:
2545 irdma_active_open_err(cm_node, false);
2546 break;
2547 case IRDMA_CM_STATE_CLOSED:
2548 break;
2549 case IRDMA_CM_STATE_FIN_WAIT2:
2550 case IRDMA_CM_STATE_FIN_WAIT1:
2551 case IRDMA_CM_STATE_LAST_ACK:
2552 case IRDMA_CM_STATE_TIME_WAIT:
2553 cm_node->state = IRDMA_CM_STATE_CLOSED;
2554 irdma_rem_ref_cm_node(cm_node);
2555 break;
2556 default:
2557 break;
2558 }
2559 }
2560
2561 /**
2562 * irdma_handle_rcv_mpa - Process a recv'd mpa buffer
2563 * @cm_node: connection's node
2564 * @rbuf: receive buffer
2565 */
2566 static void irdma_handle_rcv_mpa(struct irdma_cm_node *cm_node,
2567 struct irdma_puda_buf *rbuf)
2568 {
2569 int err;
2570 int datasize = rbuf->datalen;
2571 u8 *dataloc = rbuf->data;
2572
2573 enum irdma_cm_event_type type = IRDMA_CM_EVENT_UNKNOWN;
2574 u32 res_type;
2575
2576 err = irdma_parse_mpa(cm_node, dataloc, &res_type, datasize);
2577 if (err) {
2578 if (cm_node->state == IRDMA_CM_STATE_MPAREQ_SENT)
2579 irdma_active_open_err(cm_node, true);
2580 else
2581 irdma_passive_open_err(cm_node, true);
2582 return;
2583 }
2584
2585 switch (cm_node->state) {
2586 case IRDMA_CM_STATE_ESTABLISHED:
2587 if (res_type == IRDMA_MPA_REQUEST_REJECT)
2588 ibdev_dbg(&cm_node->iwdev->ibdev,
2589 "CM: state for reject\n");
2590 cm_node->state = IRDMA_CM_STATE_MPAREQ_RCVD;
2591 type = IRDMA_CM_EVENT_MPA_REQ;
2592 irdma_send_ack(cm_node); /* ACK received MPA request */
2593 atomic_set(&cm_node->passive_state,
2594 IRDMA_PASSIVE_STATE_INDICATED);
2595 break;
2596 case IRDMA_CM_STATE_MPAREQ_SENT:
2597 irdma_cleanup_retrans_entry(cm_node);
2598 if (res_type == IRDMA_MPA_REQUEST_REJECT) {
2599 type = IRDMA_CM_EVENT_MPA_REJECT;
2600 cm_node->state = IRDMA_CM_STATE_MPAREJ_RCVD;
2601 } else {
2602 type = IRDMA_CM_EVENT_CONNECTED;
2603 cm_node->state = IRDMA_CM_STATE_OFFLOADED;
2604 }
2605 irdma_send_ack(cm_node);
2606 break;
2607 default:
2608 ibdev_dbg(&cm_node->iwdev->ibdev,
2609 "CM: wrong cm_node state =%d\n", cm_node->state);
2610 break;
2611 }
2612 irdma_create_event(cm_node, type);
2613 }
2614
2615 /**
2616 * irdma_check_syn - Check for error on received syn ack
2617 * @cm_node: connection's node
2618 * @tcph: pointer tcp header
2619 */
2620 static int irdma_check_syn(struct irdma_cm_node *cm_node, struct tcphdr *tcph)
2621 {
2622 if (ntohl(tcph->ack_seq) != cm_node->tcp_cntxt.loc_seq_num) {
2623 irdma_active_open_err(cm_node, true);
2624 return 1;
2625 }
2626
2627 return 0;
2628 }
2629
2630 /**
2631 * irdma_check_seq - check seq numbers if OK
2632 * @cm_node: connection's node
2633 * @tcph: pointer tcp header
2634 */
2635 static int irdma_check_seq(struct irdma_cm_node *cm_node, struct tcphdr *tcph)
2636 {
2637 u32 seq;
2638 u32 ack_seq;
2639 u32 loc_seq_num = cm_node->tcp_cntxt.loc_seq_num;
2640 u32 rcv_nxt = cm_node->tcp_cntxt.rcv_nxt;
2641 u32 rcv_wnd;
2642 int err = 0;
2643
2644 seq = ntohl(tcph->seq);
2645 ack_seq = ntohl(tcph->ack_seq);
2646 rcv_wnd = cm_node->tcp_cntxt.rcv_wnd;
2647 if (ack_seq != loc_seq_num ||
2648 !between(seq, rcv_nxt, (rcv_nxt + rcv_wnd)))
2649 err = -1;
2650 if (err)
2651 ibdev_dbg(&cm_node->iwdev->ibdev,
2652 "CM: seq number err\n");
2653
2654 return err;
2655 }
2656
2657 void irdma_add_conn_est_qh(struct irdma_cm_node *cm_node)
2658 {
2659 struct irdma_cm_info nfo;
2660
2661 irdma_get_addr_info(cm_node, &nfo);
2662 nfo.qh_qpid = cm_node->iwdev->vsi.ilq->qp_id;
2663 irdma_manage_qhash(cm_node->iwdev, &nfo,
2664 IRDMA_QHASH_TYPE_TCP_ESTABLISHED,
2665 IRDMA_QHASH_MANAGE_TYPE_ADD,
2666 cm_node, false);
2667 cm_node->qhash_set = true;
2668 }
2669
2670 /**
2671 * irdma_handle_syn_pkt - is for Passive node
2672 * @cm_node: connection's node
2673 * @rbuf: receive buffer
2674 */
2675 static void irdma_handle_syn_pkt(struct irdma_cm_node *cm_node,
2676 struct irdma_puda_buf *rbuf)
2677 {
2678 struct tcphdr *tcph = (struct tcphdr *)rbuf->tcph;
2679 int err;
2680 u32 inc_sequence;
2681 int optionsize;
2682
2683 optionsize = (tcph->doff << 2) - sizeof(struct tcphdr);
2684 inc_sequence = ntohl(tcph->seq);
2685
2686 switch (cm_node->state) {
2687 case IRDMA_CM_STATE_SYN_SENT:
2688 case IRDMA_CM_STATE_MPAREQ_SENT:
2689 /* Rcvd syn on active open connection */
2690 irdma_active_open_err(cm_node, 1);
2691 break;
2692 case IRDMA_CM_STATE_LISTENING:
2693 /* Passive OPEN */
2694 if (atomic_read(&cm_node->listener->pend_accepts_cnt) >
2695 cm_node->listener->backlog) {
2696 cm_node->cm_core->stats_backlog_drops++;
2697 irdma_passive_open_err(cm_node, false);
2698 break;
2699 }
2700 err = irdma_handle_tcp_options(cm_node, tcph, optionsize, 1);
2701 if (err) {
2702 irdma_passive_open_err(cm_node, false);
2703 /* drop pkt */
2704 break;
2705 }
2706 err = cm_node->cm_core->cm_create_ah(cm_node, false);
2707 if (err) {
2708 irdma_passive_open_err(cm_node, false);
2709 /* drop pkt */
2710 break;
2711 }
2712 cm_node->tcp_cntxt.rcv_nxt = inc_sequence + 1;
2713 cm_node->accept_pend = 1;
2714 atomic_inc(&cm_node->listener->pend_accepts_cnt);
2715
2716 cm_node->state = IRDMA_CM_STATE_SYN_RCVD;
2717 break;
2718 case IRDMA_CM_STATE_CLOSED:
2719 irdma_cleanup_retrans_entry(cm_node);
2720 refcount_inc(&cm_node->refcnt);
2721 irdma_send_reset(cm_node);
2722 break;
2723 case IRDMA_CM_STATE_OFFLOADED:
2724 case IRDMA_CM_STATE_ESTABLISHED:
2725 case IRDMA_CM_STATE_FIN_WAIT1:
2726 case IRDMA_CM_STATE_FIN_WAIT2:
2727 case IRDMA_CM_STATE_MPAREQ_RCVD:
2728 case IRDMA_CM_STATE_LAST_ACK:
2729 case IRDMA_CM_STATE_CLOSING:
2730 case IRDMA_CM_STATE_UNKNOWN:
2731 default:
2732 break;
2733 }
2734 }
2735
2736 /**
2737 * irdma_handle_synack_pkt - Process SYN+ACK packet (active side)
2738 * @cm_node: connection's node
2739 * @rbuf: receive buffer
2740 */
2741 static void irdma_handle_synack_pkt(struct irdma_cm_node *cm_node,
2742 struct irdma_puda_buf *rbuf)
2743 {
2744 struct tcphdr *tcph = (struct tcphdr *)rbuf->tcph;
2745 int err;
2746 u32 inc_sequence;
2747 int optionsize;
2748
2749 optionsize = (tcph->doff << 2) - sizeof(struct tcphdr);
2750 inc_sequence = ntohl(tcph->seq);
2751 switch (cm_node->state) {
2752 case IRDMA_CM_STATE_SYN_SENT:
2753 irdma_cleanup_retrans_entry(cm_node);
2754 /* active open */
2755 if (irdma_check_syn(cm_node, tcph)) {
2756 ibdev_dbg(&cm_node->iwdev->ibdev,
2757 "CM: check syn fail\n");
2758 return;
2759 }
2760 cm_node->tcp_cntxt.rem_ack_num = ntohl(tcph->ack_seq);
2761 /* setup options */
2762 err = irdma_handle_tcp_options(cm_node, tcph, optionsize, 0);
2763 if (err) {
2764 ibdev_dbg(&cm_node->iwdev->ibdev,
2765 "CM: cm_node=%p tcp_options failed\n",
2766 cm_node);
2767 break;
2768 }
2769 irdma_cleanup_retrans_entry(cm_node);
2770 cm_node->tcp_cntxt.rcv_nxt = inc_sequence + 1;
2771 irdma_send_ack(cm_node); /* ACK for the syn_ack */
2772 err = irdma_send_mpa_request(cm_node);
2773 if (err) {
2774 ibdev_dbg(&cm_node->iwdev->ibdev,
2775 "CM: cm_node=%p irdma_send_mpa_request failed\n",
2776 cm_node);
2777 break;
2778 }
2779 cm_node->state = IRDMA_CM_STATE_MPAREQ_SENT;
2780 break;
2781 case IRDMA_CM_STATE_MPAREQ_RCVD:
2782 irdma_passive_open_err(cm_node, true);
2783 break;
2784 case IRDMA_CM_STATE_LISTENING:
2785 cm_node->tcp_cntxt.loc_seq_num = ntohl(tcph->ack_seq);
2786 irdma_cleanup_retrans_entry(cm_node);
2787 cm_node->state = IRDMA_CM_STATE_CLOSED;
2788 irdma_send_reset(cm_node);
2789 break;
2790 case IRDMA_CM_STATE_CLOSED:
2791 cm_node->tcp_cntxt.loc_seq_num = ntohl(tcph->ack_seq);
2792 irdma_cleanup_retrans_entry(cm_node);
2793 refcount_inc(&cm_node->refcnt);
2794 irdma_send_reset(cm_node);
2795 break;
2796 case IRDMA_CM_STATE_ESTABLISHED:
2797 case IRDMA_CM_STATE_FIN_WAIT1:
2798 case IRDMA_CM_STATE_FIN_WAIT2:
2799 case IRDMA_CM_STATE_LAST_ACK:
2800 case IRDMA_CM_STATE_OFFLOADED:
2801 case IRDMA_CM_STATE_CLOSING:
2802 case IRDMA_CM_STATE_UNKNOWN:
2803 case IRDMA_CM_STATE_MPAREQ_SENT:
2804 default:
2805 break;
2806 }
2807 }
2808
2809 /**
2810 * irdma_handle_ack_pkt - process packet with ACK
2811 * @cm_node: connection's node
2812 * @rbuf: receive buffer
2813 */
2814 static int irdma_handle_ack_pkt(struct irdma_cm_node *cm_node,
2815 struct irdma_puda_buf *rbuf)
2816 {
2817 struct tcphdr *tcph = (struct tcphdr *)rbuf->tcph;
2818 u32 inc_sequence;
2819 int ret;
2820 int optionsize;
2821 u32 datasize = rbuf->datalen;
2822
2823 optionsize = (tcph->doff << 2) - sizeof(struct tcphdr);
2824
2825 if (irdma_check_seq(cm_node, tcph))
2826 return -EINVAL;
2827
2828 inc_sequence = ntohl(tcph->seq);
2829 switch (cm_node->state) {
2830 case IRDMA_CM_STATE_SYN_RCVD:
2831 irdma_cleanup_retrans_entry(cm_node);
2832 ret = irdma_handle_tcp_options(cm_node, tcph, optionsize, 1);
2833 if (ret)
2834 return ret;
2835 cm_node->tcp_cntxt.rem_ack_num = ntohl(tcph->ack_seq);
2836 cm_node->state = IRDMA_CM_STATE_ESTABLISHED;
2837 if (datasize) {
2838 cm_node->tcp_cntxt.rcv_nxt = inc_sequence + datasize;
2839 irdma_handle_rcv_mpa(cm_node, rbuf);
2840 }
2841 break;
2842 case IRDMA_CM_STATE_ESTABLISHED:
2843 irdma_cleanup_retrans_entry(cm_node);
2844 if (datasize) {
2845 cm_node->tcp_cntxt.rcv_nxt = inc_sequence + datasize;
2846 irdma_handle_rcv_mpa(cm_node, rbuf);
2847 }
2848 break;
2849 case IRDMA_CM_STATE_MPAREQ_SENT:
2850 cm_node->tcp_cntxt.rem_ack_num = ntohl(tcph->ack_seq);
2851 if (datasize) {
2852 cm_node->tcp_cntxt.rcv_nxt = inc_sequence + datasize;
2853 cm_node->ack_rcvd = false;
2854 irdma_handle_rcv_mpa(cm_node, rbuf);
2855 } else {
2856 cm_node->ack_rcvd = true;
2857 }
2858 break;
2859 case IRDMA_CM_STATE_LISTENING:
2860 irdma_cleanup_retrans_entry(cm_node);
2861 cm_node->state = IRDMA_CM_STATE_CLOSED;
2862 irdma_send_reset(cm_node);
2863 break;
2864 case IRDMA_CM_STATE_CLOSED:
2865 irdma_cleanup_retrans_entry(cm_node);
2866 refcount_inc(&cm_node->refcnt);
2867 irdma_send_reset(cm_node);
2868 break;
2869 case IRDMA_CM_STATE_LAST_ACK:
2870 case IRDMA_CM_STATE_CLOSING:
2871 irdma_cleanup_retrans_entry(cm_node);
2872 cm_node->state = IRDMA_CM_STATE_CLOSED;
2873 irdma_rem_ref_cm_node(cm_node);
2874 break;
2875 case IRDMA_CM_STATE_FIN_WAIT1:
2876 irdma_cleanup_retrans_entry(cm_node);
2877 cm_node->state = IRDMA_CM_STATE_FIN_WAIT2;
2878 break;
2879 case IRDMA_CM_STATE_SYN_SENT:
2880 case IRDMA_CM_STATE_FIN_WAIT2:
2881 case IRDMA_CM_STATE_OFFLOADED:
2882 case IRDMA_CM_STATE_MPAREQ_RCVD:
2883 case IRDMA_CM_STATE_UNKNOWN:
2884 default:
2885 irdma_cleanup_retrans_entry(cm_node);
2886 break;
2887 }
2888
2889 return 0;
2890 }
2891
2892 /**
2893 * irdma_process_pkt - process cm packet
2894 * @cm_node: connection's node
2895 * @rbuf: receive buffer
2896 */
2897 static void irdma_process_pkt(struct irdma_cm_node *cm_node,
2898 struct irdma_puda_buf *rbuf)
2899 {
2900 enum irdma_tcpip_pkt_type pkt_type = IRDMA_PKT_TYPE_UNKNOWN;
2901 struct tcphdr *tcph = (struct tcphdr *)rbuf->tcph;
2902 u32 fin_set = 0;
2903 int err;
2904
2905 if (tcph->rst) {
2906 pkt_type = IRDMA_PKT_TYPE_RST;
2907 } else if (tcph->syn) {
2908 pkt_type = IRDMA_PKT_TYPE_SYN;
2909 if (tcph->ack)
2910 pkt_type = IRDMA_PKT_TYPE_SYNACK;
2911 } else if (tcph->ack) {
2912 pkt_type = IRDMA_PKT_TYPE_ACK;
2913 }
2914 if (tcph->fin)
2915 fin_set = 1;
2916
2917 switch (pkt_type) {
2918 case IRDMA_PKT_TYPE_SYN:
2919 irdma_handle_syn_pkt(cm_node, rbuf);
2920 break;
2921 case IRDMA_PKT_TYPE_SYNACK:
2922 irdma_handle_synack_pkt(cm_node, rbuf);
2923 break;
2924 case IRDMA_PKT_TYPE_ACK:
2925 err = irdma_handle_ack_pkt(cm_node, rbuf);
2926 if (fin_set && !err)
2927 irdma_handle_fin_pkt(cm_node);
2928 break;
2929 case IRDMA_PKT_TYPE_RST:
2930 irdma_handle_rst_pkt(cm_node, rbuf);
2931 break;
2932 default:
2933 if (fin_set &&
2934 (!irdma_check_seq(cm_node, (struct tcphdr *)rbuf->tcph)))
2935 irdma_handle_fin_pkt(cm_node);
2936 break;
2937 }
2938 }
2939
2940 /**
2941 * irdma_make_listen_node - create a listen node with params
2942 * @cm_core: cm's core
2943 * @iwdev: iwarp device structure
2944 * @cm_info: quad info for connection
2945 */
2946 static struct irdma_cm_listener *
2947 irdma_make_listen_node(struct irdma_cm_core *cm_core,
2948 struct irdma_device *iwdev,
2949 struct irdma_cm_info *cm_info)
2950 {
2951 struct irdma_cm_listener *listener;
2952 unsigned long flags;
2953
2954 /* cannot have multiple matching listeners */
2955 listener =
2956 irdma_find_listener(cm_core, cm_info->loc_addr, cm_info->ipv4,
2957 cm_info->loc_port, cm_info->vlan_id,
2958 IRDMA_CM_LISTENER_EITHER_STATE);
2959 if (listener &&
2960 listener->listener_state == IRDMA_CM_LISTENER_ACTIVE_STATE) {
2961 refcount_dec(&listener->refcnt);
2962 return NULL;
2963 }
2964
2965 if (!listener) {
2966 /* create a CM listen node
2967 * 1/2 node to compare incoming traffic to
2968 */
2969 listener = kzalloc(sizeof(*listener), GFP_KERNEL);
2970 if (!listener)
2971 return NULL;
2972 cm_core->stats_listen_nodes_created++;
2973 memcpy(listener->loc_addr, cm_info->loc_addr,
2974 sizeof(listener->loc_addr));
2975 listener->loc_port = cm_info->loc_port;
2976
2977 INIT_LIST_HEAD(&listener->child_listen_list);
2978
2979 refcount_set(&listener->refcnt, 1);
2980 } else {
2981 listener->reused_node = 1;
2982 }
2983
2984 listener->cm_id = cm_info->cm_id;
2985 listener->ipv4 = cm_info->ipv4;
2986 listener->vlan_id = cm_info->vlan_id;
2987 atomic_set(&listener->pend_accepts_cnt, 0);
2988 listener->cm_core = cm_core;
2989 listener->iwdev = iwdev;
2990
2991 listener->backlog = cm_info->backlog;
2992 listener->listener_state = IRDMA_CM_LISTENER_ACTIVE_STATE;
2993
2994 if (!listener->reused_node) {
2995 spin_lock_irqsave(&cm_core->listen_list_lock, flags);
2996 list_add(&listener->list, &cm_core->listen_list);
2997 spin_unlock_irqrestore(&cm_core->listen_list_lock, flags);
2998 }
2999
3000 return listener;
3001 }
3002
3003 /**
3004 * irdma_create_cm_node - make a connection node with params
3005 * @cm_core: cm's core
3006 * @iwdev: iwarp device structure
3007 * @conn_param: connection parameters
3008 * @cm_info: quad info for connection
3009 * @caller_cm_node: pointer to cm_node structure to return
3010 */
3011 static int irdma_create_cm_node(struct irdma_cm_core *cm_core,
3012 struct irdma_device *iwdev,
3013 struct iw_cm_conn_param *conn_param,
3014 struct irdma_cm_info *cm_info,
3015 struct irdma_cm_node **caller_cm_node)
3016 {
3017 struct irdma_cm_node *cm_node;
3018 u16 private_data_len = conn_param->private_data_len;
3019 const void *private_data = conn_param->private_data;
3020
3021 /* create a CM connection node */
3022 cm_node = irdma_make_cm_node(cm_core, iwdev, cm_info, NULL);
3023 if (!cm_node)
3024 return -ENOMEM;
3025
3026 /* set our node side to client (active) side */
3027 cm_node->tcp_cntxt.client = 1;
3028 cm_node->tcp_cntxt.rcv_wscale = IRDMA_CM_DEFAULT_RCV_WND_SCALE;
3029
3030 irdma_record_ird_ord(cm_node, conn_param->ird, conn_param->ord);
3031
3032 cm_node->pdata.size = private_data_len;
3033 cm_node->pdata.addr = cm_node->pdata_buf;
3034
3035 memcpy(cm_node->pdata_buf, private_data, private_data_len);
3036 *caller_cm_node = cm_node;
3037
3038 return 0;
3039 }
3040
3041 /**
3042 * irdma_cm_reject - reject and teardown a connection
3043 * @cm_node: connection's node
3044 * @pdata: ptr to private data for reject
3045 * @plen: size of private data
3046 */
3047 static int irdma_cm_reject(struct irdma_cm_node *cm_node, const void *pdata,
3048 u8 plen)
3049 {
3050 int ret;
3051 int passive_state;
3052
3053 if (cm_node->tcp_cntxt.client)
3054 return 0;
3055
3056 irdma_cleanup_retrans_entry(cm_node);
3057
3058 passive_state = atomic_add_return(1, &cm_node->passive_state);
3059 if (passive_state == IRDMA_SEND_RESET_EVENT) {
3060 cm_node->state = IRDMA_CM_STATE_CLOSED;
3061 irdma_rem_ref_cm_node(cm_node);
3062 return 0;
3063 }
3064
3065 if (cm_node->state == IRDMA_CM_STATE_LISTENER_DESTROYED) {
3066 irdma_rem_ref_cm_node(cm_node);
3067 return 0;
3068 }
3069
3070 ret = irdma_send_mpa_reject(cm_node, pdata, plen);
3071 if (!ret)
3072 return 0;
3073
3074 cm_node->state = IRDMA_CM_STATE_CLOSED;
3075 if (irdma_send_reset(cm_node))
3076 ibdev_dbg(&cm_node->iwdev->ibdev,
3077 "CM: send reset failed\n");
3078
3079 return ret;
3080 }
3081
3082 /**
3083 * irdma_cm_close - close of cm connection
3084 * @cm_node: connection's node
3085 */
3086 static int irdma_cm_close(struct irdma_cm_node *cm_node)
3087 {
3088 switch (cm_node->state) {
3089 case IRDMA_CM_STATE_SYN_RCVD:
3090 case IRDMA_CM_STATE_SYN_SENT:
3091 case IRDMA_CM_STATE_ONE_SIDE_ESTABLISHED:
3092 case IRDMA_CM_STATE_ESTABLISHED:
3093 case IRDMA_CM_STATE_ACCEPTING:
3094 case IRDMA_CM_STATE_MPAREQ_SENT:
3095 case IRDMA_CM_STATE_MPAREQ_RCVD:
3096 irdma_cleanup_retrans_entry(cm_node);
3097 irdma_send_reset(cm_node);
3098 break;
3099 case IRDMA_CM_STATE_CLOSE_WAIT:
3100 cm_node->state = IRDMA_CM_STATE_LAST_ACK;
3101 irdma_send_fin(cm_node);
3102 break;
3103 case IRDMA_CM_STATE_FIN_WAIT1:
3104 case IRDMA_CM_STATE_FIN_WAIT2:
3105 case IRDMA_CM_STATE_LAST_ACK:
3106 case IRDMA_CM_STATE_TIME_WAIT:
3107 case IRDMA_CM_STATE_CLOSING:
3108 return -EINVAL;
3109 case IRDMA_CM_STATE_LISTENING:
3110 irdma_cleanup_retrans_entry(cm_node);
3111 irdma_send_reset(cm_node);
3112 break;
3113 case IRDMA_CM_STATE_MPAREJ_RCVD:
3114 case IRDMA_CM_STATE_UNKNOWN:
3115 case IRDMA_CM_STATE_INITED:
3116 case IRDMA_CM_STATE_CLOSED:
3117 case IRDMA_CM_STATE_LISTENER_DESTROYED:
3118 irdma_rem_ref_cm_node(cm_node);
3119 break;
3120 case IRDMA_CM_STATE_OFFLOADED:
3121 if (cm_node->send_entry)
3122 ibdev_dbg(&cm_node->iwdev->ibdev,
3123 "CM: CM send_entry in OFFLOADED state\n");
3124 irdma_rem_ref_cm_node(cm_node);
3125 break;
3126 }
3127
3128 return 0;
3129 }
3130
3131 /**
3132 * irdma_receive_ilq - recv an ETHERNET packet, and process it
3133 * through CM
3134 * @vsi: VSI structure of dev
3135 * @rbuf: receive buffer
3136 */
3137 void irdma_receive_ilq(struct irdma_sc_vsi *vsi, struct irdma_puda_buf *rbuf)
3138 {
3139 struct irdma_cm_node *cm_node;
3140 struct irdma_cm_listener *listener;
3141 struct iphdr *iph;
3142 struct ipv6hdr *ip6h;
3143 struct tcphdr *tcph;
3144 struct irdma_cm_info cm_info = {};
3145 struct irdma_device *iwdev = vsi->back_vsi;
3146 struct irdma_cm_core *cm_core = &iwdev->cm_core;
3147 struct vlan_ethhdr *ethh;
3148 u16 vtag;
3149
3150 /* if vlan, then maclen = 18 else 14 */
3151 iph = (struct iphdr *)rbuf->iph;
3152 print_hex_dump_debug("ILQ: RECEIVE ILQ BUFFER", DUMP_PREFIX_OFFSET,
3153 16, 8, rbuf->mem.va, rbuf->totallen, false);
3154 if (iwdev->rf->sc_dev.hw_attrs.uk_attrs.hw_rev >= IRDMA_GEN_2) {
3155 if (rbuf->vlan_valid) {
3156 vtag = rbuf->vlan_id;
3157 cm_info.user_pri = (vtag & VLAN_PRIO_MASK) >>
3158 VLAN_PRIO_SHIFT;
3159 cm_info.vlan_id = vtag & VLAN_VID_MASK;
3160 } else {
3161 cm_info.vlan_id = 0xFFFF;
3162 }
3163 } else {
3164 ethh = rbuf->mem.va;
3165
3166 if (ethh->h_vlan_proto == htons(ETH_P_8021Q)) {
3167 vtag = ntohs(ethh->h_vlan_TCI);
3168 cm_info.user_pri = (vtag & VLAN_PRIO_MASK) >>
3169 VLAN_PRIO_SHIFT;
3170 cm_info.vlan_id = vtag & VLAN_VID_MASK;
3171 ibdev_dbg(&cm_core->iwdev->ibdev,
3172 "CM: vlan_id=%d\n", cm_info.vlan_id);
3173 } else {
3174 cm_info.vlan_id = 0xFFFF;
3175 }
3176 }
3177 tcph = (struct tcphdr *)rbuf->tcph;
3178
3179 if (rbuf->ipv4) {
3180 cm_info.loc_addr[0] = ntohl(iph->daddr);
3181 cm_info.rem_addr[0] = ntohl(iph->saddr);
3182 cm_info.ipv4 = true;
3183 cm_info.tos = iph->tos;
3184 } else {
3185 ip6h = (struct ipv6hdr *)rbuf->iph;
3186 irdma_copy_ip_ntohl(cm_info.loc_addr,
3187 ip6h->daddr.in6_u.u6_addr32);
3188 irdma_copy_ip_ntohl(cm_info.rem_addr,
3189 ip6h->saddr.in6_u.u6_addr32);
3190 cm_info.ipv4 = false;
3191 cm_info.tos = (ip6h->priority << 4) | (ip6h->flow_lbl[0] >> 4);
3192 }
3193 cm_info.loc_port = ntohs(tcph->dest);
3194 cm_info.rem_port = ntohs(tcph->source);
3195 cm_node = irdma_find_node(cm_core, cm_info.rem_port, cm_info.rem_addr,
3196 cm_info.loc_port, cm_info.loc_addr, cm_info.vlan_id);
3197
3198 if (!cm_node) {
3199 /* Only type of packet accepted are for the
3200 * PASSIVE open (syn only)
3201 */
3202 if (!tcph->syn || tcph->ack)
3203 return;
3204
3205 listener = irdma_find_listener(cm_core,
3206 cm_info.loc_addr,
3207 cm_info.ipv4,
3208 cm_info.loc_port,
3209 cm_info.vlan_id,
3210 IRDMA_CM_LISTENER_ACTIVE_STATE);
3211 if (!listener) {
3212 cm_info.cm_id = NULL;
3213 ibdev_dbg(&cm_core->iwdev->ibdev,
3214 "CM: no listener found\n");
3215 return;
3216 }
3217
3218 cm_info.cm_id = listener->cm_id;
3219 cm_node = irdma_make_cm_node(cm_core, iwdev, &cm_info,
3220 listener);
3221 if (!cm_node) {
3222 ibdev_dbg(&cm_core->iwdev->ibdev,
3223 "CM: allocate node failed\n");
3224 refcount_dec(&listener->refcnt);
3225 return;
3226 }
3227
3228 if (!tcph->rst && !tcph->fin) {
3229 cm_node->state = IRDMA_CM_STATE_LISTENING;
3230 } else {
3231 irdma_rem_ref_cm_node(cm_node);
3232 return;
3233 }
3234
3235 refcount_inc(&cm_node->refcnt);
3236 } else if (cm_node->state == IRDMA_CM_STATE_OFFLOADED) {
3237 irdma_rem_ref_cm_node(cm_node);
3238 return;
3239 }
3240
3241 irdma_process_pkt(cm_node, rbuf);
3242 irdma_rem_ref_cm_node(cm_node);
3243 }
3244
3245 static int irdma_add_qh(struct irdma_cm_node *cm_node, bool active)
3246 {
3247 if (!active)
3248 irdma_add_conn_est_qh(cm_node);
3249 return 0;
3250 }
3251
3252 static void irdma_cm_free_ah_nop(struct irdma_cm_node *cm_node)
3253 {
3254 }
3255
3256 /**
3257 * irdma_setup_cm_core - setup top level instance of a cm core
3258 * @iwdev: iwarp device structure
3259 * @rdma_ver: HW version
3260 */
3261 int irdma_setup_cm_core(struct irdma_device *iwdev, u8 rdma_ver)
3262 {
3263 struct irdma_cm_core *cm_core = &iwdev->cm_core;
3264
3265 cm_core->iwdev = iwdev;
3266 cm_core->dev = &iwdev->rf->sc_dev;
3267
3268 /* Handles CM event work items send to Iwarp core */
3269 cm_core->event_wq = alloc_ordered_workqueue("iwarp-event-wq", 0);
3270 if (!cm_core->event_wq)
3271 return -ENOMEM;
3272
3273 INIT_LIST_HEAD(&cm_core->listen_list);
3274
3275 timer_setup(&cm_core->tcp_timer, irdma_cm_timer_tick, 0);
3276
3277 spin_lock_init(&cm_core->ht_lock);
3278 spin_lock_init(&cm_core->listen_list_lock);
3279 spin_lock_init(&cm_core->apbvt_lock);
3280 switch (rdma_ver) {
3281 case IRDMA_GEN_1:
3282 cm_core->form_cm_frame = irdma_form_uda_cm_frame;
3283 cm_core->cm_create_ah = irdma_add_qh;
3284 cm_core->cm_free_ah = irdma_cm_free_ah_nop;
3285 break;
3286 case IRDMA_GEN_2:
3287 default:
3288 cm_core->form_cm_frame = irdma_form_ah_cm_frame;
3289 cm_core->cm_create_ah = irdma_cm_create_ah;
3290 cm_core->cm_free_ah = irdma_cm_free_ah;
3291 }
3292
3293 return 0;
3294 }
3295
3296 /**
3297 * irdma_cleanup_cm_core - deallocate a top level instance of a
3298 * cm core
3299 * @cm_core: cm's core
3300 */
3301 void irdma_cleanup_cm_core(struct irdma_cm_core *cm_core)
3302 {
3303 if (!cm_core)
3304 return;
3305
3306 del_timer_sync(&cm_core->tcp_timer);
3307
3308 destroy_workqueue(cm_core->event_wq);
3309 cm_core->dev->ws_reset(&cm_core->iwdev->vsi);
3310 }
3311
3312 /**
3313 * irdma_init_tcp_ctx - setup qp context
3314 * @cm_node: connection's node
3315 * @tcp_info: offload info for tcp
3316 * @iwqp: associate qp for the connection
3317 */
3318 static void irdma_init_tcp_ctx(struct irdma_cm_node *cm_node,
3319 struct irdma_tcp_offload_info *tcp_info,
3320 struct irdma_qp *iwqp)
3321 {
3322 tcp_info->ipv4 = cm_node->ipv4;
3323 tcp_info->drop_ooo_seg = !iwqp->iwdev->iw_ooo;
3324 tcp_info->wscale = true;
3325 tcp_info->ignore_tcp_opt = true;
3326 tcp_info->ignore_tcp_uns_opt = true;
3327 tcp_info->no_nagle = false;
3328
3329 tcp_info->ttl = IRDMA_DEFAULT_TTL;
3330 tcp_info->rtt_var = IRDMA_DEFAULT_RTT_VAR;
3331 tcp_info->ss_thresh = IRDMA_DEFAULT_SS_THRESH;
3332 tcp_info->rexmit_thresh = IRDMA_DEFAULT_REXMIT_THRESH;
3333
3334 tcp_info->tcp_state = IRDMA_TCP_STATE_ESTABLISHED;
3335 tcp_info->snd_wscale = cm_node->tcp_cntxt.snd_wscale;
3336 tcp_info->rcv_wscale = cm_node->tcp_cntxt.rcv_wscale;
3337
3338 tcp_info->snd_nxt = cm_node->tcp_cntxt.loc_seq_num;
3339 tcp_info->snd_wnd = cm_node->tcp_cntxt.snd_wnd;
3340 tcp_info->rcv_nxt = cm_node->tcp_cntxt.rcv_nxt;
3341 tcp_info->snd_max = cm_node->tcp_cntxt.loc_seq_num;
3342
3343 tcp_info->snd_una = cm_node->tcp_cntxt.loc_seq_num;
3344 tcp_info->cwnd = 2 * cm_node->tcp_cntxt.mss;
3345 tcp_info->snd_wl1 = cm_node->tcp_cntxt.rcv_nxt;
3346 tcp_info->snd_wl2 = cm_node->tcp_cntxt.loc_seq_num;
3347 tcp_info->max_snd_window = cm_node->tcp_cntxt.max_snd_wnd;
3348 tcp_info->rcv_wnd = cm_node->tcp_cntxt.rcv_wnd
3349 << cm_node->tcp_cntxt.rcv_wscale;
3350
3351 tcp_info->flow_label = 0;
3352 tcp_info->snd_mss = (u32)cm_node->tcp_cntxt.mss;
3353 tcp_info->tos = cm_node->tos;
3354 if (cm_node->vlan_id < VLAN_N_VID) {
3355 tcp_info->insert_vlan_tag = true;
3356 tcp_info->vlan_tag = cm_node->vlan_id;
3357 tcp_info->vlan_tag |= cm_node->user_pri << VLAN_PRIO_SHIFT;
3358 }
3359 if (cm_node->ipv4) {
3360 tcp_info->src_port = cm_node->loc_port;
3361 tcp_info->dst_port = cm_node->rem_port;
3362
3363 tcp_info->dest_ip_addr[3] = cm_node->rem_addr[0];
3364 tcp_info->local_ipaddr[3] = cm_node->loc_addr[0];
3365 tcp_info->arp_idx = (u16)irdma_arp_table(iwqp->iwdev->rf,
3366 &tcp_info->dest_ip_addr[3],
3367 true, NULL,
3368 IRDMA_ARP_RESOLVE);
3369 } else {
3370 tcp_info->src_port = cm_node->loc_port;
3371 tcp_info->dst_port = cm_node->rem_port;
3372 memcpy(tcp_info->dest_ip_addr, cm_node->rem_addr,
3373 sizeof(tcp_info->dest_ip_addr));
3374 memcpy(tcp_info->local_ipaddr, cm_node->loc_addr,
3375 sizeof(tcp_info->local_ipaddr));
3376
3377 tcp_info->arp_idx = (u16)irdma_arp_table(iwqp->iwdev->rf,
3378 &tcp_info->dest_ip_addr[0],
3379 false, NULL,
3380 IRDMA_ARP_RESOLVE);
3381 }
3382 }
3383
3384 /**
3385 * irdma_cm_init_tsa_conn - setup qp for RTS
3386 * @iwqp: associate qp for the connection
3387 * @cm_node: connection's node
3388 */
3389 static void irdma_cm_init_tsa_conn(struct irdma_qp *iwqp,
3390 struct irdma_cm_node *cm_node)
3391 {
3392 struct irdma_iwarp_offload_info *iwarp_info;
3393 struct irdma_qp_host_ctx_info *ctx_info;
3394
3395 iwarp_info = &iwqp->iwarp_info;
3396 ctx_info = &iwqp->ctx_info;
3397
3398 ctx_info->tcp_info = &iwqp->tcp_info;
3399 ctx_info->send_cq_num = iwqp->iwscq->sc_cq.cq_uk.cq_id;
3400 ctx_info->rcv_cq_num = iwqp->iwrcq->sc_cq.cq_uk.cq_id;
3401
3402 iwarp_info->ord_size = cm_node->ord_size;
3403 iwarp_info->ird_size = cm_node->ird_size;
3404 iwarp_info->rd_en = true;
3405 iwarp_info->rdmap_ver = 1;
3406 iwarp_info->ddp_ver = 1;
3407 iwarp_info->pd_id = iwqp->iwpd->sc_pd.pd_id;
3408
3409 ctx_info->tcp_info_valid = true;
3410 ctx_info->iwarp_info_valid = true;
3411 ctx_info->user_pri = cm_node->user_pri;
3412
3413 irdma_init_tcp_ctx(cm_node, &iwqp->tcp_info, iwqp);
3414 if (cm_node->snd_mark_en) {
3415 iwarp_info->snd_mark_en = true;
3416 iwarp_info->snd_mark_offset = (iwqp->tcp_info.snd_nxt & SNDMARKER_SEQNMASK) +
3417 cm_node->lsmm_size;
3418 }
3419
3420 cm_node->state = IRDMA_CM_STATE_OFFLOADED;
3421 iwqp->tcp_info.tcp_state = IRDMA_TCP_STATE_ESTABLISHED;
3422 iwqp->tcp_info.src_mac_addr_idx = iwqp->iwdev->mac_ip_table_idx;
3423
3424 if (cm_node->rcv_mark_en) {
3425 iwarp_info->rcv_mark_en = true;
3426 iwarp_info->align_hdrs = true;
3427 }
3428
3429 irdma_sc_qp_setctx(&iwqp->sc_qp, iwqp->host_ctx.va, ctx_info);
3430
3431 /* once tcp_info is set, no need to do it again */
3432 ctx_info->tcp_info_valid = false;
3433 ctx_info->iwarp_info_valid = false;
3434 }
3435
3436 /**
3437 * irdma_cm_disconn - when a connection is being closed
3438 * @iwqp: associated qp for the connection
3439 */
3440 void irdma_cm_disconn(struct irdma_qp *iwqp)
3441 {
3442 struct irdma_device *iwdev = iwqp->iwdev;
3443 struct disconn_work *work;
3444 unsigned long flags;
3445
3446 work = kzalloc(sizeof(*work), GFP_ATOMIC);
3447 if (!work)
3448 return;
3449
3450 spin_lock_irqsave(&iwdev->rf->qptable_lock, flags);
3451 if (!iwdev->rf->qp_table[iwqp->ibqp.qp_num]) {
3452 spin_unlock_irqrestore(&iwdev->rf->qptable_lock, flags);
3453 ibdev_dbg(&iwdev->ibdev,
3454 "CM: qp_id %d is already freed\n",
3455 iwqp->ibqp.qp_num);
3456 kfree(work);
3457 return;
3458 }
3459 irdma_qp_add_ref(&iwqp->ibqp);
3460 spin_unlock_irqrestore(&iwdev->rf->qptable_lock, flags);
3461
3462 work->iwqp = iwqp;
3463 INIT_WORK(&work->work, irdma_disconnect_worker);
3464 queue_work(iwdev->cleanup_wq, &work->work);
3465 }
3466
3467 /**
3468 * irdma_qp_disconnect - free qp and close cm
3469 * @iwqp: associate qp for the connection
3470 */
3471 static void irdma_qp_disconnect(struct irdma_qp *iwqp)
3472 {
3473 struct irdma_device *iwdev = iwqp->iwdev;
3474
3475 iwqp->active_conn = 0;
3476 /* close the CM node down if it is still active */
3477 ibdev_dbg(&iwdev->ibdev, "CM: Call close API\n");
3478 irdma_cm_close(iwqp->cm_node);
3479 }
3480
3481 /**
3482 * irdma_cm_disconn_true - called by worker thread to disconnect qp
3483 * @iwqp: associate qp for the connection
3484 */
3485 static void irdma_cm_disconn_true(struct irdma_qp *iwqp)
3486 {
3487 struct iw_cm_id *cm_id;
3488 struct irdma_device *iwdev;
3489 struct irdma_sc_qp *qp = &iwqp->sc_qp;
3490 u16 last_ae;
3491 u8 original_hw_tcp_state;
3492 u8 original_ibqp_state;
3493 int disconn_status = 0;
3494 int issue_disconn = 0;
3495 int issue_close = 0;
3496 int issue_flush = 0;
3497 unsigned long flags;
3498 int err;
3499
3500 iwdev = iwqp->iwdev;
3501 spin_lock_irqsave(&iwqp->lock, flags);
3502 if (rdma_protocol_roce(&iwdev->ibdev, 1)) {
3503 struct ib_qp_attr attr;
3504
3505 if (iwqp->flush_issued || iwqp->sc_qp.qp_uk.destroy_pending) {
3506 spin_unlock_irqrestore(&iwqp->lock, flags);
3507 return;
3508 }
3509
3510 spin_unlock_irqrestore(&iwqp->lock, flags);
3511
3512 attr.qp_state = IB_QPS_ERR;
3513 irdma_modify_qp_roce(&iwqp->ibqp, &attr, IB_QP_STATE, NULL);
3514 irdma_ib_qp_event(iwqp, qp->event_type);
3515 return;
3516 }
3517
3518 cm_id = iwqp->cm_id;
3519 original_hw_tcp_state = iwqp->hw_tcp_state;
3520 original_ibqp_state = iwqp->ibqp_state;
3521 last_ae = iwqp->last_aeq;
3522
3523 if (qp->term_flags) {
3524 issue_disconn = 1;
3525 issue_close = 1;
3526 iwqp->cm_id = NULL;
3527 irdma_terminate_del_timer(qp);
3528 if (!iwqp->flush_issued) {
3529 iwqp->flush_issued = 1;
3530 issue_flush = 1;
3531 }
3532 } else if ((original_hw_tcp_state == IRDMA_TCP_STATE_CLOSE_WAIT) ||
3533 ((original_ibqp_state == IB_QPS_RTS) &&
3534 (last_ae == IRDMA_AE_LLP_CONNECTION_RESET))) {
3535 issue_disconn = 1;
3536 if (last_ae == IRDMA_AE_LLP_CONNECTION_RESET)
3537 disconn_status = -ECONNRESET;
3538 }
3539
3540 if (original_hw_tcp_state == IRDMA_TCP_STATE_CLOSED ||
3541 original_hw_tcp_state == IRDMA_TCP_STATE_TIME_WAIT ||
3542 last_ae == IRDMA_AE_RDMAP_ROE_BAD_LLP_CLOSE ||
3543 last_ae == IRDMA_AE_BAD_CLOSE ||
3544 last_ae == IRDMA_AE_LLP_CONNECTION_RESET || iwdev->rf->reset || !cm_id) {
3545 issue_close = 1;
3546 iwqp->cm_id = NULL;
3547 qp->term_flags = 0;
3548 if (!iwqp->flush_issued) {
3549 iwqp->flush_issued = 1;
3550 issue_flush = 1;
3551 }
3552 }
3553
3554 spin_unlock_irqrestore(&iwqp->lock, flags);
3555 if (issue_flush && !iwqp->sc_qp.qp_uk.destroy_pending) {
3556 irdma_flush_wqes(iwqp, IRDMA_FLUSH_SQ | IRDMA_FLUSH_RQ |
3557 IRDMA_FLUSH_WAIT);
3558
3559 if (qp->term_flags)
3560 irdma_ib_qp_event(iwqp, qp->event_type);
3561 }
3562
3563 if (!cm_id || !cm_id->event_handler)
3564 return;
3565
3566 spin_lock_irqsave(&iwdev->cm_core.ht_lock, flags);
3567 if (!iwqp->cm_node) {
3568 spin_unlock_irqrestore(&iwdev->cm_core.ht_lock, flags);
3569 return;
3570 }
3571 refcount_inc(&iwqp->cm_node->refcnt);
3572
3573 spin_unlock_irqrestore(&iwdev->cm_core.ht_lock, flags);
3574
3575 if (issue_disconn) {
3576 err = irdma_send_cm_event(iwqp->cm_node, cm_id,
3577 IW_CM_EVENT_DISCONNECT,
3578 disconn_status);
3579 if (err)
3580 ibdev_dbg(&iwdev->ibdev,
3581 "CM: disconnect event failed: - cm_id = %p\n",
3582 cm_id);
3583 }
3584 if (issue_close) {
3585 cm_id->provider_data = iwqp;
3586 err = irdma_send_cm_event(iwqp->cm_node, cm_id,
3587 IW_CM_EVENT_CLOSE, 0);
3588 if (err)
3589 ibdev_dbg(&iwdev->ibdev,
3590 "CM: close event failed: - cm_id = %p\n",
3591 cm_id);
3592 irdma_qp_disconnect(iwqp);
3593 }
3594 irdma_rem_ref_cm_node(iwqp->cm_node);
3595 }
3596
3597 /**
3598 * irdma_disconnect_worker - worker for connection close
3599 * @work: points or disconn structure
3600 */
3601 static void irdma_disconnect_worker(struct work_struct *work)
3602 {
3603 struct disconn_work *dwork = container_of(work, struct disconn_work, work);
3604 struct irdma_qp *iwqp = dwork->iwqp;
3605
3606 kfree(dwork);
3607 irdma_cm_disconn_true(iwqp);
3608 irdma_qp_rem_ref(&iwqp->ibqp);
3609 }
3610
3611 /**
3612 * irdma_free_lsmm_rsrc - free lsmm memory and deregister
3613 * @iwqp: associate qp for the connection
3614 */
3615 void irdma_free_lsmm_rsrc(struct irdma_qp *iwqp)
3616 {
3617 struct irdma_device *iwdev;
3618
3619 iwdev = iwqp->iwdev;
3620
3621 if (iwqp->ietf_mem.va) {
3622 if (iwqp->lsmm_mr)
3623 iwdev->ibdev.ops.dereg_mr(iwqp->lsmm_mr, NULL);
3624 dma_free_coherent(iwdev->rf->sc_dev.hw->device,
3625 iwqp->ietf_mem.size, iwqp->ietf_mem.va,
3626 iwqp->ietf_mem.pa);
3627 iwqp->ietf_mem.va = NULL;
3628 }
3629 }
3630
3631 /**
3632 * irdma_accept - registered call for connection to be accepted
3633 * @cm_id: cm information for passive connection
3634 * @conn_param: accept parameters
3635 */
3636 int irdma_accept(struct iw_cm_id *cm_id, struct iw_cm_conn_param *conn_param)
3637 {
3638 struct ib_qp *ibqp;
3639 struct irdma_qp *iwqp;
3640 struct irdma_device *iwdev;
3641 struct irdma_sc_dev *dev;
3642 struct irdma_cm_node *cm_node;
3643 struct ib_qp_attr attr = {};
3644 int passive_state;
3645 struct ib_mr *ibmr;
3646 struct irdma_pd *iwpd;
3647 u16 buf_len = 0;
3648 struct irdma_kmem_info accept;
3649 u64 tagged_offset;
3650 int wait_ret;
3651 int ret = 0;
3652
3653 ibqp = irdma_get_qp(cm_id->device, conn_param->qpn);
3654 if (!ibqp)
3655 return -EINVAL;
3656
3657 iwqp = to_iwqp(ibqp);
3658 iwdev = iwqp->iwdev;
3659 dev = &iwdev->rf->sc_dev;
3660 cm_node = cm_id->provider_data;
3661
3662 if (((struct sockaddr_in *)&cm_id->local_addr)->sin_family == AF_INET) {
3663 cm_node->ipv4 = true;
3664 cm_node->vlan_id = irdma_get_vlan_ipv4(cm_node->loc_addr);
3665 } else {
3666 cm_node->ipv4 = false;
3667 irdma_get_vlan_mac_ipv6(cm_node->loc_addr, &cm_node->vlan_id,
3668 NULL);
3669 }
3670 ibdev_dbg(&iwdev->ibdev, "CM: Accept vlan_id=%d\n",
3671 cm_node->vlan_id);
3672
3673 trace_irdma_accept(cm_node, 0, NULL);
3674
3675 if (cm_node->state == IRDMA_CM_STATE_LISTENER_DESTROYED) {
3676 ret = -EINVAL;
3677 goto error;
3678 }
3679
3680 passive_state = atomic_add_return(1, &cm_node->passive_state);
3681 if (passive_state == IRDMA_SEND_RESET_EVENT) {
3682 ret = -ECONNRESET;
3683 goto error;
3684 }
3685
3686 buf_len = conn_param->private_data_len + IRDMA_MAX_IETF_SIZE;
3687 iwqp->ietf_mem.size = ALIGN(buf_len, 1);
3688 iwqp->ietf_mem.va = dma_alloc_coherent(dev->hw->device,
3689 iwqp->ietf_mem.size,
3690 &iwqp->ietf_mem.pa, GFP_KERNEL);
3691 if (!iwqp->ietf_mem.va) {
3692 ret = -ENOMEM;
3693 goto error;
3694 }
3695
3696 cm_node->pdata.size = conn_param->private_data_len;
3697 accept.addr = iwqp->ietf_mem.va;
3698 accept.size = irdma_cm_build_mpa_frame(cm_node, &accept, MPA_KEY_REPLY);
3699 memcpy((u8 *)accept.addr + accept.size, conn_param->private_data,
3700 conn_param->private_data_len);
3701
3702 if (cm_node->dev->ws_add(iwqp->sc_qp.vsi, cm_node->user_pri)) {
3703 ret = -ENOMEM;
3704 goto error;
3705 }
3706 iwqp->sc_qp.user_pri = cm_node->user_pri;
3707 irdma_qp_add_qos(&iwqp->sc_qp);
3708 /* setup our first outgoing iWarp send WQE (the IETF frame response) */
3709 iwpd = iwqp->iwpd;
3710 tagged_offset = (uintptr_t)iwqp->ietf_mem.va;
3711 ibmr = irdma_reg_phys_mr(&iwpd->ibpd, iwqp->ietf_mem.pa, buf_len,
3712 IB_ACCESS_LOCAL_WRITE, &tagged_offset);
3713 if (IS_ERR(ibmr)) {
3714 ret = -ENOMEM;
3715 goto error;
3716 }
3717
3718 ibmr->pd = &iwpd->ibpd;
3719 ibmr->device = iwpd->ibpd.device;
3720 iwqp->lsmm_mr = ibmr;
3721 if (iwqp->page)
3722 iwqp->sc_qp.qp_uk.sq_base = kmap_local_page(iwqp->page);
3723
3724 cm_node->lsmm_size = accept.size + conn_param->private_data_len;
3725 irdma_sc_send_lsmm(&iwqp->sc_qp, iwqp->ietf_mem.va, cm_node->lsmm_size,
3726 ibmr->lkey);
3727
3728 if (iwqp->page)
3729 kunmap_local(iwqp->sc_qp.qp_uk.sq_base);
3730
3731 iwqp->cm_id = cm_id;
3732 cm_node->cm_id = cm_id;
3733
3734 cm_id->provider_data = iwqp;
3735 iwqp->active_conn = 0;
3736 iwqp->cm_node = cm_node;
3737 cm_node->iwqp = iwqp;
3738 irdma_cm_init_tsa_conn(iwqp, cm_node);
3739 irdma_qp_add_ref(&iwqp->ibqp);
3740 cm_id->add_ref(cm_id);
3741
3742 attr.qp_state = IB_QPS_RTS;
3743 cm_node->qhash_set = false;
3744 cm_node->cm_core->cm_free_ah(cm_node);
3745
3746 irdma_modify_qp(&iwqp->ibqp, &attr, IB_QP_STATE, NULL);
3747 if (dev->hw_attrs.uk_attrs.feature_flags & IRDMA_FEATURE_RTS_AE) {
3748 wait_ret = wait_event_interruptible_timeout(iwqp->waitq,
3749 iwqp->rts_ae_rcvd,
3750 IRDMA_MAX_TIMEOUT);
3751 if (!wait_ret) {
3752 ibdev_dbg(&iwdev->ibdev,
3753 "CM: Slow Connection: cm_node=%p, loc_port=%d, rem_port=%d, cm_id=%p\n",
3754 cm_node, cm_node->loc_port,
3755 cm_node->rem_port, cm_node->cm_id);
3756 ret = -ECONNRESET;
3757 goto error;
3758 }
3759 }
3760
3761 irdma_send_cm_event(cm_node, cm_id, IW_CM_EVENT_ESTABLISHED, 0);
3762 cm_node->accelerated = true;
3763 complete(&cm_node->establish_comp);
3764
3765 if (cm_node->accept_pend) {
3766 atomic_dec(&cm_node->listener->pend_accepts_cnt);
3767 cm_node->accept_pend = 0;
3768 }
3769
3770 ibdev_dbg(&iwdev->ibdev,
3771 "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",
3772 cm_node->rem_port, cm_node->loc_port, cm_node->rem_addr,
3773 cm_node->loc_addr, cm_node, cm_id, ibqp->qp_num);
3774 cm_node->cm_core->stats_accepts++;
3775
3776 return 0;
3777 error:
3778 irdma_free_lsmm_rsrc(iwqp);
3779 irdma_rem_ref_cm_node(cm_node);
3780
3781 return ret;
3782 }
3783
3784 /**
3785 * irdma_reject - registered call for connection to be rejected
3786 * @cm_id: cm information for passive connection
3787 * @pdata: private data to be sent
3788 * @pdata_len: private data length
3789 */
3790 int irdma_reject(struct iw_cm_id *cm_id, const void *pdata, u8 pdata_len)
3791 {
3792 struct irdma_device *iwdev;
3793 struct irdma_cm_node *cm_node;
3794
3795 cm_node = cm_id->provider_data;
3796 cm_node->pdata.size = pdata_len;
3797
3798 trace_irdma_reject(cm_node, 0, NULL);
3799
3800 iwdev = to_iwdev(cm_id->device);
3801 if (!iwdev)
3802 return -EINVAL;
3803
3804 cm_node->cm_core->stats_rejects++;
3805
3806 if (pdata_len + sizeof(struct ietf_mpa_v2) > IRDMA_MAX_CM_BUF)
3807 return -EINVAL;
3808
3809 return irdma_cm_reject(cm_node, pdata, pdata_len);
3810 }
3811
3812 /**
3813 * irdma_connect - registered call for connection to be established
3814 * @cm_id: cm information for passive connection
3815 * @conn_param: Information about the connection
3816 */
3817 int irdma_connect(struct iw_cm_id *cm_id, struct iw_cm_conn_param *conn_param)
3818 {
3819 struct ib_qp *ibqp;
3820 struct irdma_qp *iwqp;
3821 struct irdma_device *iwdev;
3822 struct irdma_cm_node *cm_node;
3823 struct irdma_cm_info cm_info;
3824 struct sockaddr_in *laddr;
3825 struct sockaddr_in *raddr;
3826 struct sockaddr_in6 *laddr6;
3827 struct sockaddr_in6 *raddr6;
3828 int ret = 0;
3829
3830 ibqp = irdma_get_qp(cm_id->device, conn_param->qpn);
3831 if (!ibqp)
3832 return -EINVAL;
3833 iwqp = to_iwqp(ibqp);
3834 if (!iwqp)
3835 return -EINVAL;
3836 iwdev = iwqp->iwdev;
3837 if (!iwdev)
3838 return -EINVAL;
3839
3840 laddr = (struct sockaddr_in *)&cm_id->m_local_addr;
3841 raddr = (struct sockaddr_in *)&cm_id->m_remote_addr;
3842 laddr6 = (struct sockaddr_in6 *)&cm_id->m_local_addr;
3843 raddr6 = (struct sockaddr_in6 *)&cm_id->m_remote_addr;
3844
3845 if (!(laddr->sin_port) || !(raddr->sin_port))
3846 return -EINVAL;
3847
3848 iwqp->active_conn = 1;
3849 iwqp->cm_id = NULL;
3850 cm_id->provider_data = iwqp;
3851
3852 /* set up the connection params for the node */
3853 if (cm_id->remote_addr.ss_family == AF_INET) {
3854 if (iwdev->vsi.mtu < IRDMA_MIN_MTU_IPV4)
3855 return -EINVAL;
3856
3857 cm_info.ipv4 = true;
3858 memset(cm_info.loc_addr, 0, sizeof(cm_info.loc_addr));
3859 memset(cm_info.rem_addr, 0, sizeof(cm_info.rem_addr));
3860 cm_info.loc_addr[0] = ntohl(laddr->sin_addr.s_addr);
3861 cm_info.rem_addr[0] = ntohl(raddr->sin_addr.s_addr);
3862 cm_info.loc_port = ntohs(laddr->sin_port);
3863 cm_info.rem_port = ntohs(raddr->sin_port);
3864 cm_info.vlan_id = irdma_get_vlan_ipv4(cm_info.loc_addr);
3865 } else {
3866 if (iwdev->vsi.mtu < IRDMA_MIN_MTU_IPV6)
3867 return -EINVAL;
3868
3869 cm_info.ipv4 = false;
3870 irdma_copy_ip_ntohl(cm_info.loc_addr,
3871 laddr6->sin6_addr.in6_u.u6_addr32);
3872 irdma_copy_ip_ntohl(cm_info.rem_addr,
3873 raddr6->sin6_addr.in6_u.u6_addr32);
3874 cm_info.loc_port = ntohs(laddr6->sin6_port);
3875 cm_info.rem_port = ntohs(raddr6->sin6_port);
3876 irdma_get_vlan_mac_ipv6(cm_info.loc_addr, &cm_info.vlan_id,
3877 NULL);
3878 }
3879 cm_info.cm_id = cm_id;
3880 cm_info.qh_qpid = iwdev->vsi.ilq->qp_id;
3881 cm_info.tos = cm_id->tos;
3882 if (iwdev->vsi.dscp_mode) {
3883 cm_info.user_pri =
3884 iwqp->sc_qp.vsi->dscp_map[irdma_tos2dscp(cm_info.tos)];
3885 } else {
3886 cm_info.user_pri = rt_tos2priority(cm_id->tos);
3887 cm_info.user_pri = irdma_iw_get_vlan_prio(cm_info.loc_addr,
3888 cm_info.user_pri,
3889 cm_info.ipv4);
3890 }
3891
3892 if (iwqp->sc_qp.dev->ws_add(iwqp->sc_qp.vsi, cm_info.user_pri))
3893 return -ENOMEM;
3894 iwqp->sc_qp.user_pri = cm_info.user_pri;
3895 irdma_qp_add_qos(&iwqp->sc_qp);
3896 ibdev_dbg(&iwdev->ibdev, "DCB: TOS:[%d] UP:[%d]\n", cm_id->tos,
3897 cm_info.user_pri);
3898
3899 trace_irdma_dcb_tos(iwdev, cm_id->tos, cm_info.user_pri);
3900
3901 ret = irdma_create_cm_node(&iwdev->cm_core, iwdev, conn_param, &cm_info,
3902 &cm_node);
3903 if (ret)
3904 return ret;
3905 ret = cm_node->cm_core->cm_create_ah(cm_node, true);
3906 if (ret)
3907 goto err;
3908 if (irdma_manage_qhash(iwdev, &cm_info,
3909 IRDMA_QHASH_TYPE_TCP_ESTABLISHED,
3910 IRDMA_QHASH_MANAGE_TYPE_ADD, NULL, true)) {
3911 ret = -EINVAL;
3912 goto err;
3913 }
3914 cm_node->qhash_set = true;
3915
3916 cm_node->apbvt_entry = irdma_add_apbvt(iwdev, cm_info.loc_port);
3917 if (!cm_node->apbvt_entry) {
3918 ret = -EINVAL;
3919 goto err;
3920 }
3921
3922 cm_node->apbvt_set = true;
3923 iwqp->cm_node = cm_node;
3924 cm_node->iwqp = iwqp;
3925 iwqp->cm_id = cm_id;
3926 irdma_qp_add_ref(&iwqp->ibqp);
3927 cm_id->add_ref(cm_id);
3928
3929 if (cm_node->state != IRDMA_CM_STATE_OFFLOADED) {
3930 cm_node->state = IRDMA_CM_STATE_SYN_SENT;
3931 ret = irdma_send_syn(cm_node, 0);
3932 if (ret)
3933 goto err;
3934 }
3935
3936 ibdev_dbg(&iwdev->ibdev,
3937 "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",
3938 cm_node->rem_port, cm_node->loc_port, cm_node->rem_addr,
3939 cm_node->loc_addr, cm_node, cm_id, ibqp->qp_num);
3940
3941 trace_irdma_connect(cm_node, 0, NULL);
3942
3943 return 0;
3944
3945 err:
3946 if (cm_info.ipv4)
3947 ibdev_dbg(&iwdev->ibdev,
3948 "CM: connect() FAILED: dest addr=%pI4",
3949 cm_info.rem_addr);
3950 else
3951 ibdev_dbg(&iwdev->ibdev,
3952 "CM: connect() FAILED: dest addr=%pI6",
3953 cm_info.rem_addr);
3954 irdma_rem_ref_cm_node(cm_node);
3955 iwdev->cm_core.stats_connect_errs++;
3956
3957 return ret;
3958 }
3959
3960 /**
3961 * irdma_create_listen - registered call creating listener
3962 * @cm_id: cm information for passive connection
3963 * @backlog: to max accept pending count
3964 */
3965 int irdma_create_listen(struct iw_cm_id *cm_id, int backlog)
3966 {
3967 struct irdma_device *iwdev;
3968 struct irdma_cm_listener *cm_listen_node;
3969 struct irdma_cm_info cm_info = {};
3970 struct sockaddr_in *laddr;
3971 struct sockaddr_in6 *laddr6;
3972 bool wildcard = false;
3973 int err;
3974
3975 iwdev = to_iwdev(cm_id->device);
3976 if (!iwdev)
3977 return -EINVAL;
3978
3979 laddr = (struct sockaddr_in *)&cm_id->m_local_addr;
3980 laddr6 = (struct sockaddr_in6 *)&cm_id->m_local_addr;
3981 cm_info.qh_qpid = iwdev->vsi.ilq->qp_id;
3982
3983 if (laddr->sin_family == AF_INET) {
3984 if (iwdev->vsi.mtu < IRDMA_MIN_MTU_IPV4)
3985 return -EINVAL;
3986
3987 cm_info.ipv4 = true;
3988 cm_info.loc_addr[0] = ntohl(laddr->sin_addr.s_addr);
3989 cm_info.loc_port = ntohs(laddr->sin_port);
3990
3991 if (laddr->sin_addr.s_addr != htonl(INADDR_ANY)) {
3992 cm_info.vlan_id = irdma_get_vlan_ipv4(cm_info.loc_addr);
3993 } else {
3994 cm_info.vlan_id = 0xFFFF;
3995 wildcard = true;
3996 }
3997 } else {
3998 if (iwdev->vsi.mtu < IRDMA_MIN_MTU_IPV6)
3999 return -EINVAL;
4000
4001 cm_info.ipv4 = false;
4002 irdma_copy_ip_ntohl(cm_info.loc_addr,
4003 laddr6->sin6_addr.in6_u.u6_addr32);
4004 cm_info.loc_port = ntohs(laddr6->sin6_port);
4005 if (ipv6_addr_type(&laddr6->sin6_addr) != IPV6_ADDR_ANY) {
4006 irdma_get_vlan_mac_ipv6(cm_info.loc_addr,
4007 &cm_info.vlan_id, NULL);
4008 } else {
4009 cm_info.vlan_id = 0xFFFF;
4010 wildcard = true;
4011 }
4012 }
4013
4014 if (cm_info.vlan_id >= VLAN_N_VID && iwdev->dcb_vlan_mode)
4015 cm_info.vlan_id = 0;
4016 cm_info.backlog = backlog;
4017 cm_info.cm_id = cm_id;
4018
4019 trace_irdma_create_listen(iwdev, &cm_info);
4020
4021 cm_listen_node = irdma_make_listen_node(&iwdev->cm_core, iwdev,
4022 &cm_info);
4023 if (!cm_listen_node) {
4024 ibdev_dbg(&iwdev->ibdev,
4025 "CM: cm_listen_node == NULL\n");
4026 return -ENOMEM;
4027 }
4028
4029 cm_id->provider_data = cm_listen_node;
4030
4031 cm_listen_node->tos = cm_id->tos;
4032 if (iwdev->vsi.dscp_mode)
4033 cm_listen_node->user_pri =
4034 iwdev->vsi.dscp_map[irdma_tos2dscp(cm_id->tos)];
4035 else
4036 cm_listen_node->user_pri = rt_tos2priority(cm_id->tos);
4037 cm_info.user_pri = cm_listen_node->user_pri;
4038 if (!cm_listen_node->reused_node) {
4039 if (wildcard) {
4040 err = irdma_add_mqh(iwdev, &cm_info, cm_listen_node);
4041 if (err)
4042 goto error;
4043 } else {
4044 if (!iwdev->vsi.dscp_mode)
4045 cm_listen_node->user_pri =
4046 irdma_iw_get_vlan_prio(cm_info.loc_addr,
4047 cm_info.user_pri,
4048 cm_info.ipv4);
4049 cm_info.user_pri = cm_listen_node->user_pri;
4050 err = irdma_manage_qhash(iwdev, &cm_info,
4051 IRDMA_QHASH_TYPE_TCP_SYN,
4052 IRDMA_QHASH_MANAGE_TYPE_ADD,
4053 NULL, true);
4054 if (err)
4055 goto error;
4056
4057 cm_listen_node->qhash_set = true;
4058 }
4059
4060 cm_listen_node->apbvt_entry = irdma_add_apbvt(iwdev,
4061 cm_info.loc_port);
4062 if (!cm_listen_node->apbvt_entry)
4063 goto error;
4064 }
4065 cm_id->add_ref(cm_id);
4066 cm_listen_node->cm_core->stats_listen_created++;
4067 ibdev_dbg(&iwdev->ibdev,
4068 "CM: loc_port=0x%04x loc_addr=%pI4 cm_listen_node=%p cm_id=%p qhash_set=%d vlan_id=%d\n",
4069 cm_listen_node->loc_port, cm_listen_node->loc_addr,
4070 cm_listen_node, cm_listen_node->cm_id,
4071 cm_listen_node->qhash_set, cm_listen_node->vlan_id);
4072
4073 return 0;
4074
4075 error:
4076
4077 irdma_cm_del_listen(&iwdev->cm_core, cm_listen_node, false);
4078
4079 return -EINVAL;
4080 }
4081
4082 /**
4083 * irdma_destroy_listen - registered call to destroy listener
4084 * @cm_id: cm information for passive connection
4085 */
4086 int irdma_destroy_listen(struct iw_cm_id *cm_id)
4087 {
4088 struct irdma_device *iwdev;
4089
4090 iwdev = to_iwdev(cm_id->device);
4091 if (cm_id->provider_data)
4092 irdma_cm_del_listen(&iwdev->cm_core, cm_id->provider_data,
4093 true);
4094 else
4095 ibdev_dbg(&iwdev->ibdev,
4096 "CM: cm_id->provider_data was NULL\n");
4097
4098 cm_id->rem_ref(cm_id);
4099
4100 return 0;
4101 }
4102
4103 /**
4104 * irdma_teardown_list_prep - add conn nodes slated for tear down to list
4105 * @cm_core: cm's core
4106 * @teardown_list: a list to which cm_node will be selected
4107 * @ipaddr: pointer to ip address
4108 * @nfo: pointer to cm_info structure instance
4109 * @disconnect_all: flag indicating disconnect all QPs
4110 */
4111 static void irdma_teardown_list_prep(struct irdma_cm_core *cm_core,
4112 struct list_head *teardown_list,
4113 u32 *ipaddr,
4114 struct irdma_cm_info *nfo,
4115 bool disconnect_all)
4116 {
4117 struct irdma_cm_node *cm_node;
4118 int bkt;
4119
4120 hash_for_each_rcu(cm_core->cm_hash_tbl, bkt, cm_node, list) {
4121 if ((disconnect_all ||
4122 (nfo->vlan_id == cm_node->vlan_id &&
4123 !memcmp(cm_node->loc_addr, ipaddr, nfo->ipv4 ? 4 : 16))) &&
4124 refcount_inc_not_zero(&cm_node->refcnt))
4125 list_add(&cm_node->teardown_entry, teardown_list);
4126 }
4127 }
4128
4129 /**
4130 * irdma_cm_event_connected - handle connected active node
4131 * @event: the info for cm_node of connection
4132 */
4133 static void irdma_cm_event_connected(struct irdma_cm_event *event)
4134 {
4135 struct irdma_qp *iwqp;
4136 struct irdma_device *iwdev;
4137 struct irdma_cm_node *cm_node;
4138 struct irdma_sc_dev *dev;
4139 struct ib_qp_attr attr = {};
4140 struct iw_cm_id *cm_id;
4141 int status;
4142 bool read0;
4143 int wait_ret = 0;
4144
4145 cm_node = event->cm_node;
4146 cm_id = cm_node->cm_id;
4147 iwqp = cm_id->provider_data;
4148 iwdev = iwqp->iwdev;
4149 dev = &iwdev->rf->sc_dev;
4150 if (iwqp->sc_qp.qp_uk.destroy_pending) {
4151 status = -ETIMEDOUT;
4152 goto error;
4153 }
4154
4155 irdma_cm_init_tsa_conn(iwqp, cm_node);
4156 read0 = (cm_node->send_rdma0_op == SEND_RDMA_READ_ZERO);
4157 if (iwqp->page)
4158 iwqp->sc_qp.qp_uk.sq_base = kmap_local_page(iwqp->page);
4159 irdma_sc_send_rtt(&iwqp->sc_qp, read0);
4160 if (iwqp->page)
4161 kunmap_local(iwqp->sc_qp.qp_uk.sq_base);
4162
4163 attr.qp_state = IB_QPS_RTS;
4164 cm_node->qhash_set = false;
4165 irdma_modify_qp(&iwqp->ibqp, &attr, IB_QP_STATE, NULL);
4166 if (dev->hw_attrs.uk_attrs.feature_flags & IRDMA_FEATURE_RTS_AE) {
4167 wait_ret = wait_event_interruptible_timeout(iwqp->waitq,
4168 iwqp->rts_ae_rcvd,
4169 IRDMA_MAX_TIMEOUT);
4170 if (!wait_ret)
4171 ibdev_dbg(&iwdev->ibdev,
4172 "CM: Slow Connection: cm_node=%p, loc_port=%d, rem_port=%d, cm_id=%p\n",
4173 cm_node, cm_node->loc_port,
4174 cm_node->rem_port, cm_node->cm_id);
4175 }
4176
4177 irdma_send_cm_event(cm_node, cm_id, IW_CM_EVENT_CONNECT_REPLY, 0);
4178 cm_node->accelerated = true;
4179 complete(&cm_node->establish_comp);
4180 cm_node->cm_core->cm_free_ah(cm_node);
4181 return;
4182
4183 error:
4184 iwqp->cm_id = NULL;
4185 cm_id->provider_data = NULL;
4186 irdma_send_cm_event(event->cm_node, cm_id, IW_CM_EVENT_CONNECT_REPLY,
4187 status);
4188 irdma_rem_ref_cm_node(event->cm_node);
4189 }
4190
4191 /**
4192 * irdma_cm_event_reset - handle reset
4193 * @event: the info for cm_node of connection
4194 */
4195 static void irdma_cm_event_reset(struct irdma_cm_event *event)
4196 {
4197 struct irdma_cm_node *cm_node = event->cm_node;
4198 struct iw_cm_id *cm_id = cm_node->cm_id;
4199 struct irdma_qp *iwqp;
4200
4201 if (!cm_id)
4202 return;
4203
4204 iwqp = cm_id->provider_data;
4205 if (!iwqp)
4206 return;
4207
4208 ibdev_dbg(&cm_node->iwdev->ibdev,
4209 "CM: reset event %p - cm_id = %p\n", event->cm_node, cm_id);
4210 iwqp->cm_id = NULL;
4211
4212 irdma_send_cm_event(cm_node, cm_node->cm_id, IW_CM_EVENT_DISCONNECT,
4213 -ECONNRESET);
4214 irdma_send_cm_event(cm_node, cm_node->cm_id, IW_CM_EVENT_CLOSE, 0);
4215 }
4216
4217 /**
4218 * irdma_cm_event_handler - send event to cm upper layer
4219 * @work: pointer of cm event info.
4220 */
4221 static void irdma_cm_event_handler(struct work_struct *work)
4222 {
4223 struct irdma_cm_event *event = container_of(work, struct irdma_cm_event, event_work);
4224 struct irdma_cm_node *cm_node;
4225
4226 if (!event || !event->cm_node || !event->cm_node->cm_core)
4227 return;
4228
4229 cm_node = event->cm_node;
4230 trace_irdma_cm_event_handler(cm_node, event->type, NULL);
4231
4232 switch (event->type) {
4233 case IRDMA_CM_EVENT_MPA_REQ:
4234 irdma_send_cm_event(cm_node, cm_node->cm_id,
4235 IW_CM_EVENT_CONNECT_REQUEST, 0);
4236 break;
4237 case IRDMA_CM_EVENT_RESET:
4238 irdma_cm_event_reset(event);
4239 break;
4240 case IRDMA_CM_EVENT_CONNECTED:
4241 if (!event->cm_node->cm_id ||
4242 event->cm_node->state != IRDMA_CM_STATE_OFFLOADED)
4243 break;
4244 irdma_cm_event_connected(event);
4245 break;
4246 case IRDMA_CM_EVENT_MPA_REJECT:
4247 if (!event->cm_node->cm_id ||
4248 cm_node->state == IRDMA_CM_STATE_OFFLOADED)
4249 break;
4250 irdma_send_cm_event(cm_node, cm_node->cm_id,
4251 IW_CM_EVENT_CONNECT_REPLY, -ECONNREFUSED);
4252 break;
4253 case IRDMA_CM_EVENT_ABORTED:
4254 if (!event->cm_node->cm_id ||
4255 event->cm_node->state == IRDMA_CM_STATE_OFFLOADED)
4256 break;
4257 irdma_event_connect_error(event);
4258 break;
4259 default:
4260 ibdev_dbg(&cm_node->iwdev->ibdev,
4261 "CM: bad event type = %d\n", event->type);
4262 break;
4263 }
4264
4265 irdma_rem_ref_cm_node(event->cm_node);
4266 kfree(event);
4267 }
4268
4269 /**
4270 * irdma_cm_post_event - queue event request for worker thread
4271 * @event: cm node's info for up event call
4272 */
4273 static void irdma_cm_post_event(struct irdma_cm_event *event)
4274 {
4275 refcount_inc(&event->cm_node->refcnt);
4276 INIT_WORK(&event->event_work, irdma_cm_event_handler);
4277 queue_work(event->cm_node->cm_core->event_wq, &event->event_work);
4278 }
4279
4280 /**
4281 * irdma_cm_teardown_connections - teardown QPs
4282 * @iwdev: device pointer
4283 * @ipaddr: Pointer to IPv4 or IPv6 address
4284 * @nfo: Connection info
4285 * @disconnect_all: flag indicating disconnect all QPs
4286 *
4287 * teardown QPs where source or destination addr matches ip addr
4288 */
4289 void irdma_cm_teardown_connections(struct irdma_device *iwdev, u32 *ipaddr,
4290 struct irdma_cm_info *nfo,
4291 bool disconnect_all)
4292 {
4293 struct irdma_cm_core *cm_core = &iwdev->cm_core;
4294 struct list_head *list_core_temp;
4295 struct list_head *list_node;
4296 struct irdma_cm_node *cm_node;
4297 struct list_head teardown_list;
4298 struct ib_qp_attr attr;
4299
4300 INIT_LIST_HEAD(&teardown_list);
4301
4302 rcu_read_lock();
4303 irdma_teardown_list_prep(cm_core, &teardown_list, ipaddr, nfo, disconnect_all);
4304 rcu_read_unlock();
4305
4306 list_for_each_safe (list_node, list_core_temp, &teardown_list) {
4307 cm_node = container_of(list_node, struct irdma_cm_node,
4308 teardown_entry);
4309 attr.qp_state = IB_QPS_ERR;
4310 irdma_modify_qp(&cm_node->iwqp->ibqp, &attr, IB_QP_STATE, NULL);
4311 if (iwdev->rf->reset)
4312 irdma_cm_disconn(cm_node->iwqp);
4313 irdma_rem_ref_cm_node(cm_node);
4314 }
4315 }
4316
4317 /**
4318 * irdma_qhash_ctrl - enable/disable qhash for list
4319 * @iwdev: device pointer
4320 * @parent_listen_node: parent listen node
4321 * @nfo: cm info node
4322 * @ipaddr: Pointer to IPv4 or IPv6 address
4323 * @ipv4: flag indicating IPv4 when true
4324 * @ifup: flag indicating interface up when true
4325 *
4326 * Enables or disables the qhash for the node in the child
4327 * listen list that matches ipaddr. If no matching IP was found
4328 * it will allocate and add a new child listen node to the
4329 * parent listen node. The listen_list_lock is assumed to be
4330 * held when called.
4331 */
4332 static void irdma_qhash_ctrl(struct irdma_device *iwdev,
4333 struct irdma_cm_listener *parent_listen_node,
4334 struct irdma_cm_info *nfo, u32 *ipaddr, bool ipv4,
4335 bool ifup)
4336 {
4337 struct list_head *child_listen_list = &parent_listen_node->child_listen_list;
4338 struct irdma_cm_listener *child_listen_node;
4339 struct list_head *pos, *tpos;
4340 bool node_allocated = false;
4341 enum irdma_quad_hash_manage_type op = ifup ?
4342 IRDMA_QHASH_MANAGE_TYPE_ADD :
4343 IRDMA_QHASH_MANAGE_TYPE_DELETE;
4344 int err;
4345
4346 list_for_each_safe (pos, tpos, child_listen_list) {
4347 child_listen_node = list_entry(pos, struct irdma_cm_listener,
4348 child_listen_list);
4349 if (!memcmp(child_listen_node->loc_addr, ipaddr, ipv4 ? 4 : 16))
4350 goto set_qhash;
4351 }
4352
4353 /* if not found then add a child listener if interface is going up */
4354 if (!ifup)
4355 return;
4356 child_listen_node = kmemdup(parent_listen_node,
4357 sizeof(*child_listen_node), GFP_ATOMIC);
4358 if (!child_listen_node)
4359 return;
4360
4361 node_allocated = true;
4362 memcpy(child_listen_node->loc_addr, ipaddr, ipv4 ? 4 : 16);
4363
4364 set_qhash:
4365 memcpy(nfo->loc_addr, child_listen_node->loc_addr,
4366 sizeof(nfo->loc_addr));
4367 nfo->vlan_id = child_listen_node->vlan_id;
4368 err = irdma_manage_qhash(iwdev, nfo, IRDMA_QHASH_TYPE_TCP_SYN, op, NULL,
4369 false);
4370 if (!err) {
4371 child_listen_node->qhash_set = ifup;
4372 if (node_allocated)
4373 list_add(&child_listen_node->child_listen_list,
4374 &parent_listen_node->child_listen_list);
4375 } else if (node_allocated) {
4376 kfree(child_listen_node);
4377 }
4378 }
4379
4380 /**
4381 * irdma_if_notify - process an ifdown on an interface
4382 * @iwdev: device pointer
4383 * @netdev: network device structure
4384 * @ipaddr: Pointer to IPv4 or IPv6 address
4385 * @ipv4: flag indicating IPv4 when true
4386 * @ifup: flag indicating interface up when true
4387 */
4388 void irdma_if_notify(struct irdma_device *iwdev, struct net_device *netdev,
4389 u32 *ipaddr, bool ipv4, bool ifup)
4390 {
4391 struct irdma_cm_core *cm_core = &iwdev->cm_core;
4392 unsigned long flags;
4393 struct irdma_cm_listener *listen_node;
4394 static const u32 ip_zero[4] = { 0, 0, 0, 0 };
4395 struct irdma_cm_info nfo = {};
4396 u16 vlan_id = rdma_vlan_dev_vlan_id(netdev);
4397 enum irdma_quad_hash_manage_type op = ifup ?
4398 IRDMA_QHASH_MANAGE_TYPE_ADD :
4399 IRDMA_QHASH_MANAGE_TYPE_DELETE;
4400
4401 nfo.vlan_id = vlan_id;
4402 nfo.ipv4 = ipv4;
4403 nfo.qh_qpid = 1;
4404
4405 /* Disable or enable qhash for listeners */
4406 spin_lock_irqsave(&cm_core->listen_list_lock, flags);
4407 list_for_each_entry (listen_node, &cm_core->listen_list, list) {
4408 if (vlan_id != listen_node->vlan_id ||
4409 (memcmp(listen_node->loc_addr, ipaddr, ipv4 ? 4 : 16) &&
4410 memcmp(listen_node->loc_addr, ip_zero, ipv4 ? 4 : 16)))
4411 continue;
4412
4413 memcpy(nfo.loc_addr, listen_node->loc_addr,
4414 sizeof(nfo.loc_addr));
4415 nfo.loc_port = listen_node->loc_port;
4416 nfo.user_pri = listen_node->user_pri;
4417 if (!list_empty(&listen_node->child_listen_list)) {
4418 irdma_qhash_ctrl(iwdev, listen_node, &nfo, ipaddr, ipv4,
4419 ifup);
4420 } else if (memcmp(listen_node->loc_addr, ip_zero,
4421 ipv4 ? 4 : 16)) {
4422 if (!irdma_manage_qhash(iwdev, &nfo,
4423 IRDMA_QHASH_TYPE_TCP_SYN, op,
4424 NULL, false))
4425 listen_node->qhash_set = ifup;
4426 }
4427 }
4428 spin_unlock_irqrestore(&cm_core->listen_list_lock, flags);
4429
4430 /* disconnect any connected qp's on ifdown */
4431 if (!ifup)
4432 irdma_cm_teardown_connections(iwdev, ipaddr, &nfo, false);
4433 }
Kernel DRM miscellaneous fixes and cross-tree changes