1 // SPDX-License-Identifier: GPL-2.0 or Linux-OpenIB
2 /* Copyright (c) 2015 - 2021 Intel Corporation */
3 #include "main.h"
4 #include "trace.h"
5
6 static void irdma_cm_post_event(struct irdma_cm_event *event);
7 static void irdma_disconnect_worker(struct work_struct *work);
8
9 /**
10 * irdma_free_sqbuf - put back puda buffer if refcount is 0
11 * @vsi: The VSI structure of the device
12 * @bufp: puda buffer to free
13 */
irdma_free_sqbuf(struct irdma_sc_vsi * vsi,void * bufp)14 void irdma_free_sqbuf(struct irdma_sc_vsi *vsi, void *bufp)
15 {
16 struct irdma_puda_buf *buf = bufp;
17 struct irdma_puda_rsrc *ilq = vsi->ilq;
18
19 if (refcount_dec_and_test(&buf->refcount))
20 irdma_puda_ret_bufpool(ilq, buf);
21 }
22
23 /**
24 * irdma_record_ird_ord - Record IRD/ORD passed in
25 * @cm_node: connection's node
26 * @conn_ird: connection IRD
27 * @conn_ord: connection ORD
28 */
irdma_record_ird_ord(struct irdma_cm_node * cm_node,u32 conn_ird,u32 conn_ord)29 static void irdma_record_ird_ord(struct irdma_cm_node *cm_node, u32 conn_ird,
30 u32 conn_ord)
31 {
32 if (conn_ird > cm_node->dev->hw_attrs.max_hw_ird)
33 conn_ird = cm_node->dev->hw_attrs.max_hw_ird;
34
35 if (conn_ord > cm_node->dev->hw_attrs.max_hw_ord)
36 conn_ord = cm_node->dev->hw_attrs.max_hw_ord;
37 else if (!conn_ord && cm_node->send_rdma0_op == SEND_RDMA_READ_ZERO)
38 conn_ord = 1;
39 cm_node->ird_size = conn_ird;
40 cm_node->ord_size = conn_ord;
41 }
42
43 /**
44 * irdma_copy_ip_ntohl - copy IP address from network to host
45 * @dst: IP address in host order
46 * @src: IP address in network order (big endian)
47 */
irdma_copy_ip_ntohl(u32 * dst,__be32 * src)48 void irdma_copy_ip_ntohl(u32 *dst, __be32 *src)
49 {
50 *dst++ = ntohl(*src++);
51 *dst++ = ntohl(*src++);
52 *dst++ = ntohl(*src++);
53 *dst = ntohl(*src);
54 }
55
56 /**
57 * irdma_copy_ip_htonl - copy IP address from host to network order
58 * @dst: IP address in network order (big endian)
59 * @src: IP address in host order
60 */
irdma_copy_ip_htonl(__be32 * dst,u32 * src)61 void irdma_copy_ip_htonl(__be32 *dst, u32 *src)
62 {
63 *dst++ = htonl(*src++);
64 *dst++ = htonl(*src++);
65 *dst++ = htonl(*src++);
66 *dst = htonl(*src);
67 }
68
69 /**
70 * irdma_get_addr_info
71 * @cm_node: contains ip/tcp info
72 * @cm_info: to get a copy of the cm_node ip/tcp info
73 */
irdma_get_addr_info(struct irdma_cm_node * cm_node,struct irdma_cm_info * cm_info)74 static void irdma_get_addr_info(struct irdma_cm_node *cm_node,
75 struct irdma_cm_info *cm_info)
76 {
77 memset(cm_info, 0, sizeof(*cm_info));
78 cm_info->ipv4 = cm_node->ipv4;
79 cm_info->vlan_id = cm_node->vlan_id;
80 memcpy(cm_info->loc_addr, cm_node->loc_addr, sizeof(cm_info->loc_addr));
81 memcpy(cm_info->rem_addr, cm_node->rem_addr, sizeof(cm_info->rem_addr));
82 cm_info->loc_port = cm_node->loc_port;
83 cm_info->rem_port = cm_node->rem_port;
84 }
85
86 /**
87 * irdma_fill_sockaddr4 - fill in addr info for IPv4 connection
88 * @cm_node: connection's node
89 * @event: upper layer's cm event
90 */
irdma_fill_sockaddr4(struct irdma_cm_node * cm_node,struct iw_cm_event * event)91 static inline void irdma_fill_sockaddr4(struct irdma_cm_node *cm_node,
92 struct iw_cm_event *event)
93 {
94 struct sockaddr_in *laddr = (struct sockaddr_in *)&event->local_addr;
95 struct sockaddr_in *raddr = (struct sockaddr_in *)&event->remote_addr;
96
97 laddr->sin_family = AF_INET;
98 raddr->sin_family = AF_INET;
99
100 laddr->sin_port = htons(cm_node->loc_port);
101 raddr->sin_port = htons(cm_node->rem_port);
102
103 laddr->sin_addr.s_addr = htonl(cm_node->loc_addr[0]);
104 raddr->sin_addr.s_addr = htonl(cm_node->rem_addr[0]);
105 }
106
107 /**
108 * irdma_fill_sockaddr6 - fill in addr info for IPv6 connection
109 * @cm_node: connection's node
110 * @event: upper layer's cm event
111 */
irdma_fill_sockaddr6(struct irdma_cm_node * cm_node,struct iw_cm_event * event)112 static inline void irdma_fill_sockaddr6(struct irdma_cm_node *cm_node,
113 struct iw_cm_event *event)
114 {
115 struct sockaddr_in6 *laddr6 = (struct sockaddr_in6 *)&event->local_addr;
116 struct sockaddr_in6 *raddr6 = (struct sockaddr_in6 *)&event->remote_addr;
117
118 laddr6->sin6_family = AF_INET6;
119 raddr6->sin6_family = AF_INET6;
120
121 laddr6->sin6_port = htons(cm_node->loc_port);
122 raddr6->sin6_port = htons(cm_node->rem_port);
123
124 irdma_copy_ip_htonl(laddr6->sin6_addr.in6_u.u6_addr32,
125 cm_node->loc_addr);
126 irdma_copy_ip_htonl(raddr6->sin6_addr.in6_u.u6_addr32,
127 cm_node->rem_addr);
128 }
129
130 /**
131 * irdma_get_cmevent_info - for cm event upcall
132 * @cm_node: connection's node
133 * @cm_id: upper layers cm struct for the event
134 * @event: upper layer's cm event
135 */
irdma_get_cmevent_info(struct irdma_cm_node * cm_node,struct iw_cm_id * cm_id,struct iw_cm_event * event)136 static inline void irdma_get_cmevent_info(struct irdma_cm_node *cm_node,
137 struct iw_cm_id *cm_id,
138 struct iw_cm_event *event)
139 {
140 memcpy(&event->local_addr, &cm_id->m_local_addr,
141 sizeof(event->local_addr));
142 memcpy(&event->remote_addr, &cm_id->m_remote_addr,
143 sizeof(event->remote_addr));
144 if (cm_node) {
145 event->private_data = cm_node->pdata_buf;
146 event->private_data_len = (u8)cm_node->pdata.size;
147 event->ird = cm_node->ird_size;
148 event->ord = cm_node->ord_size;
149 }
150 }
151
152 /**
153 * irdma_send_cm_event - upcall cm's event handler
154 * @cm_node: connection's node
155 * @cm_id: upper layer's cm info struct
156 * @type: Event type to indicate
157 * @status: status for the event type
158 */
irdma_send_cm_event(struct irdma_cm_node * cm_node,struct iw_cm_id * cm_id,enum iw_cm_event_type type,int status)159 static int irdma_send_cm_event(struct irdma_cm_node *cm_node,
160 struct iw_cm_id *cm_id,
161 enum iw_cm_event_type type, int status)
162 {
163 struct iw_cm_event event = {};
164
165 event.event = type;
166 event.status = status;
167 trace_irdma_send_cm_event(cm_node, cm_id, type, status,
168 __builtin_return_address(0));
169
170 ibdev_dbg(&cm_node->iwdev->ibdev,
171 "CM: cm_node %p cm_id=%p state=%d accel=%d event_type=%d status=%d\n",
172 cm_node, cm_id, cm_node->accelerated, cm_node->state, type,
173 status);
174
175 switch (type) {
176 case IW_CM_EVENT_CONNECT_REQUEST:
177 if (cm_node->ipv4)
178 irdma_fill_sockaddr4(cm_node, &event);
179 else
180 irdma_fill_sockaddr6(cm_node, &event);
181 event.provider_data = cm_node;
182 event.private_data = cm_node->pdata_buf;
183 event.private_data_len = (u8)cm_node->pdata.size;
184 event.ird = cm_node->ird_size;
185 break;
186 case IW_CM_EVENT_CONNECT_REPLY:
187 irdma_get_cmevent_info(cm_node, cm_id, &event);
188 break;
189 case IW_CM_EVENT_ESTABLISHED:
190 event.ird = cm_node->ird_size;
191 event.ord = cm_node->ord_size;
192 break;
193 case IW_CM_EVENT_DISCONNECT:
194 case IW_CM_EVENT_CLOSE:
195 /* Wait if we are in RTS but havent issued the iwcm event upcall */
196 if (!cm_node->accelerated)
197 wait_for_completion(&cm_node->establish_comp);
198 break;
199 default:
200 return -EINVAL;
201 }
202
203 return cm_id->event_handler(cm_id, &event);
204 }
205
206 /**
207 * irdma_timer_list_prep - add connection nodes to a list to perform timer tasks
208 * @cm_core: cm's core
209 * @timer_list: a timer list to which cm_node will be selected
210 */
irdma_timer_list_prep(struct irdma_cm_core * cm_core,struct list_head * timer_list)211 static void irdma_timer_list_prep(struct irdma_cm_core *cm_core,
212 struct list_head *timer_list)
213 {
214 struct irdma_cm_node *cm_node;
215 int bkt;
216
217 hash_for_each_rcu(cm_core->cm_hash_tbl, bkt, cm_node, list) {
218 if ((cm_node->close_entry || cm_node->send_entry) &&
219 refcount_inc_not_zero(&cm_node->refcnt))
220 list_add(&cm_node->timer_entry, timer_list);
221 }
222 }
223
224 /**
225 * irdma_create_event - create cm event
226 * @cm_node: connection's node
227 * @type: Event type to generate
228 */
irdma_create_event(struct irdma_cm_node * cm_node,enum irdma_cm_event_type type)229 static struct irdma_cm_event *irdma_create_event(struct irdma_cm_node *cm_node,
230 enum irdma_cm_event_type type)
231 {
232 struct irdma_cm_event *event;
233
234 if (!cm_node->cm_id)
235 return NULL;
236
237 event = kzalloc(sizeof(*event), GFP_ATOMIC);
238
239 if (!event)
240 return NULL;
241
242 event->type = type;
243 event->cm_node = cm_node;
244 memcpy(event->cm_info.rem_addr, cm_node->rem_addr,
245 sizeof(event->cm_info.rem_addr));
246 memcpy(event->cm_info.loc_addr, cm_node->loc_addr,
247 sizeof(event->cm_info.loc_addr));
248 event->cm_info.rem_port = cm_node->rem_port;
249 event->cm_info.loc_port = cm_node->loc_port;
250 event->cm_info.cm_id = cm_node->cm_id;
251 ibdev_dbg(&cm_node->iwdev->ibdev,
252 "CM: node=%p event=%p type=%u dst=%pI4 src=%pI4\n", cm_node,
253 event, type, event->cm_info.loc_addr,
254 event->cm_info.rem_addr);
255 trace_irdma_create_event(cm_node, type, __builtin_return_address(0));
256 irdma_cm_post_event(event);
257
258 return event;
259 }
260
261 /**
262 * irdma_free_retrans_entry - free send entry
263 * @cm_node: connection's node
264 */
irdma_free_retrans_entry(struct irdma_cm_node * cm_node)265 static void irdma_free_retrans_entry(struct irdma_cm_node *cm_node)
266 {
267 struct irdma_device *iwdev = cm_node->iwdev;
268 struct irdma_timer_entry *send_entry;
269
270 send_entry = cm_node->send_entry;
271 if (!send_entry)
272 return;
273
274 cm_node->send_entry = NULL;
275 irdma_free_sqbuf(&iwdev->vsi, send_entry->sqbuf);
276 kfree(send_entry);
277 refcount_dec(&cm_node->refcnt);
278 }
279
280 /**
281 * irdma_cleanup_retrans_entry - free send entry with lock
282 * @cm_node: connection's node
283 */
irdma_cleanup_retrans_entry(struct irdma_cm_node * cm_node)284 static void irdma_cleanup_retrans_entry(struct irdma_cm_node *cm_node)
285 {
286 unsigned long flags;
287
288 spin_lock_irqsave(&cm_node->retrans_list_lock, flags);
289 irdma_free_retrans_entry(cm_node);
290 spin_unlock_irqrestore(&cm_node->retrans_list_lock, flags);
291 }
292
293 /**
294 * irdma_form_ah_cm_frame - get a free packet and build frame with address handle
295 * @cm_node: connection's node ionfo to use in frame
296 * @options: pointer to options info
297 * @hdr: pointer mpa header
298 * @pdata: pointer to private data
299 * @flags: indicates FIN or ACK
300 */
irdma_form_ah_cm_frame(struct irdma_cm_node * cm_node,struct irdma_kmem_info * options,struct irdma_kmem_info * hdr,struct irdma_mpa_priv_info * pdata,u8 flags)301 static struct irdma_puda_buf *irdma_form_ah_cm_frame(struct irdma_cm_node *cm_node,
302 struct irdma_kmem_info *options,
303 struct irdma_kmem_info *hdr,
304 struct irdma_mpa_priv_info *pdata,
305 u8 flags)
306 {
307 struct irdma_puda_buf *sqbuf;
308 struct irdma_sc_vsi *vsi = &cm_node->iwdev->vsi;
309 u8 *buf;
310 struct tcphdr *tcph;
311 u16 pktsize;
312 u32 opts_len = 0;
313 u32 pd_len = 0;
314 u32 hdr_len = 0;
315
316 if (!cm_node->ah || !cm_node->ah->ah_info.ah_valid) {
317 ibdev_dbg(&cm_node->iwdev->ibdev, "CM: AH invalid\n");
318 return NULL;
319 }
320
321 sqbuf = irdma_puda_get_bufpool(vsi->ilq);
322 if (!sqbuf) {
323 ibdev_dbg(&cm_node->iwdev->ibdev, "CM: SQ buf NULL\n");
324 return NULL;
325 }
326
327 sqbuf->ah_id = cm_node->ah->ah_info.ah_idx;
328 buf = sqbuf->mem.va;
329 if (options)
330 opts_len = (u32)options->size;
331
332 if (hdr)
333 hdr_len = hdr->size;
334
335 if (pdata)
336 pd_len = pdata->size;
337
338 pktsize = sizeof(*tcph) + opts_len + hdr_len + pd_len;
339
340 memset(buf, 0, 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 */
irdma_form_uda_cm_frame(struct irdma_cm_node * cm_node,struct irdma_kmem_info * options,struct irdma_kmem_info * hdr,struct irdma_mpa_priv_info * pdata,u8 flags)410 static struct irdma_puda_buf *irdma_form_uda_cm_frame(struct irdma_cm_node *cm_node,
411 struct irdma_kmem_info *options,
412 struct irdma_kmem_info *hdr,
413 struct irdma_mpa_priv_info *pdata,
414 u8 flags)
415 {
416 struct irdma_puda_buf *sqbuf;
417 struct irdma_sc_vsi *vsi = &cm_node->iwdev->vsi;
418 u8 *buf;
419
420 struct tcphdr *tcph;
421 struct iphdr *iph;
422 struct ipv6hdr *ip6h;
423 struct ethhdr *ethh;
424 u16 pktsize;
425 u16 eth_hlen = ETH_HLEN;
426 u32 opts_len = 0;
427 u32 pd_len = 0;
428 u32 hdr_len = 0;
429
430 u16 vtag;
431
432 sqbuf = irdma_puda_get_bufpool(vsi->ilq);
433 if (!sqbuf)
434 return NULL;
435
436 buf = sqbuf->mem.va;
437
438 if (options)
439 opts_len = (u32)options->size;
440
441 if (hdr)
442 hdr_len = hdr->size;
443
444 if (pdata)
445 pd_len = pdata->size;
446
447 if (cm_node->vlan_id < VLAN_N_VID)
448 eth_hlen += 4;
449
450 if (cm_node->ipv4)
451 pktsize = sizeof(*iph) + sizeof(*tcph);
452 else
453 pktsize = sizeof(*ip6h) + sizeof(*tcph);
454 pktsize += opts_len + hdr_len + pd_len;
455
456 memset(buf, 0, eth_hlen + pktsize);
457
458 sqbuf->totallen = pktsize + eth_hlen;
459 sqbuf->maclen = eth_hlen;
460 sqbuf->tcphlen = sizeof(*tcph) + opts_len;
461 sqbuf->scratch = cm_node;
462
463 ethh = (struct ethhdr *)buf;
464 buf += eth_hlen;
465
466 if (cm_node->do_lpb)
467 sqbuf->do_lpb = true;
468
469 if (cm_node->ipv4) {
470 sqbuf->ipv4 = true;
471
472 iph = (struct iphdr *)buf;
473 buf += sizeof(*iph);
474 tcph = (struct tcphdr *)buf;
475 buf += sizeof(*tcph);
476
477 ether_addr_copy(ethh->h_dest, cm_node->rem_mac);
478 ether_addr_copy(ethh->h_source, cm_node->loc_mac);
479 if (cm_node->vlan_id < VLAN_N_VID) {
480 ((struct vlan_ethhdr *)ethh)->h_vlan_proto =
481 htons(ETH_P_8021Q);
482 vtag = (cm_node->user_pri << VLAN_PRIO_SHIFT) |
483 cm_node->vlan_id;
484 ((struct vlan_ethhdr *)ethh)->h_vlan_TCI = htons(vtag);
485
486 ((struct vlan_ethhdr *)ethh)->h_vlan_encapsulated_proto =
487 htons(ETH_P_IP);
488 } else {
489 ethh->h_proto = htons(ETH_P_IP);
490 }
491
492 iph->version = IPVERSION;
493 iph->ihl = 5; /* 5 * 4Byte words, IP headr len */
494 iph->tos = cm_node->tos;
495 iph->tot_len = htons(pktsize);
496 iph->id = htons(++cm_node->tcp_cntxt.loc_id);
497
498 iph->frag_off = htons(0x4000);
499 iph->ttl = 0x40;
500 iph->protocol = IPPROTO_TCP;
501 iph->saddr = htonl(cm_node->loc_addr[0]);
502 iph->daddr = htonl(cm_node->rem_addr[0]);
503 } else {
504 sqbuf->ipv4 = false;
505 ip6h = (struct ipv6hdr *)buf;
506 buf += sizeof(*ip6h);
507 tcph = (struct tcphdr *)buf;
508 buf += sizeof(*tcph);
509
510 ether_addr_copy(ethh->h_dest, cm_node->rem_mac);
511 ether_addr_copy(ethh->h_source, cm_node->loc_mac);
512 if (cm_node->vlan_id < VLAN_N_VID) {
513 ((struct vlan_ethhdr *)ethh)->h_vlan_proto =
514 htons(ETH_P_8021Q);
515 vtag = (cm_node->user_pri << VLAN_PRIO_SHIFT) |
516 cm_node->vlan_id;
517 ((struct vlan_ethhdr *)ethh)->h_vlan_TCI = htons(vtag);
518 ((struct vlan_ethhdr *)ethh)->h_vlan_encapsulated_proto =
519 htons(ETH_P_IPV6);
520 } else {
521 ethh->h_proto = htons(ETH_P_IPV6);
522 }
523 ip6h->version = 6;
524 ip6h->priority = cm_node->tos >> 4;
525 ip6h->flow_lbl[0] = cm_node->tos << 4;
526 ip6h->flow_lbl[1] = 0;
527 ip6h->flow_lbl[2] = 0;
528 ip6h->payload_len = htons(pktsize - sizeof(*ip6h));
529 ip6h->nexthdr = 6;
530 ip6h->hop_limit = 128;
531 irdma_copy_ip_htonl(ip6h->saddr.in6_u.u6_addr32,
532 cm_node->loc_addr);
533 irdma_copy_ip_htonl(ip6h->daddr.in6_u.u6_addr32,
534 cm_node->rem_addr);
535 }
536
537 tcph->source = htons(cm_node->loc_port);
538 tcph->dest = htons(cm_node->rem_port);
539 tcph->seq = htonl(cm_node->tcp_cntxt.loc_seq_num);
540
541 if (flags & SET_ACK) {
542 cm_node->tcp_cntxt.loc_ack_num = cm_node->tcp_cntxt.rcv_nxt;
543 tcph->ack_seq = htonl(cm_node->tcp_cntxt.loc_ack_num);
544 tcph->ack = 1;
545 } else {
546 tcph->ack_seq = 0;
547 }
548
549 if (flags & SET_SYN) {
550 cm_node->tcp_cntxt.loc_seq_num++;
551 tcph->syn = 1;
552 } else {
553 cm_node->tcp_cntxt.loc_seq_num += hdr_len + pd_len;
554 }
555
556 if (flags & SET_FIN) {
557 cm_node->tcp_cntxt.loc_seq_num++;
558 tcph->fin = 1;
559 }
560
561 if (flags & SET_RST)
562 tcph->rst = 1;
563
564 tcph->doff = (u16)((sizeof(*tcph) + opts_len + 3) >> 2);
565 sqbuf->tcphlen = tcph->doff << 2;
566 tcph->window = htons(cm_node->tcp_cntxt.rcv_wnd);
567 tcph->urg_ptr = 0;
568
569 if (opts_len) {
570 memcpy(buf, options->addr, opts_len);
571 buf += opts_len;
572 }
573
574 if (hdr_len) {
575 memcpy(buf, hdr->addr, hdr_len);
576 buf += hdr_len;
577 }
578
579 if (pdata && pdata->addr)
580 memcpy(buf, pdata->addr, pdata->size);
581
582 refcount_set(&sqbuf->refcount, 1);
583
584 print_hex_dump_debug("ILQ: TRANSMIT ILQ BUFFER", DUMP_PREFIX_OFFSET,
585 16, 8, sqbuf->mem.va, sqbuf->totallen, false);
586 return sqbuf;
587 }
588
589 /**
590 * irdma_send_reset - Send RST packet
591 * @cm_node: connection's node
592 */
irdma_send_reset(struct irdma_cm_node * cm_node)593 int irdma_send_reset(struct irdma_cm_node *cm_node)
594 {
595 struct irdma_puda_buf *sqbuf;
596 int flags = SET_RST | SET_ACK;
597
598 trace_irdma_send_reset(cm_node, 0, __builtin_return_address(0));
599 sqbuf = cm_node->cm_core->form_cm_frame(cm_node, NULL, NULL, NULL,
600 flags);
601 if (!sqbuf)
602 return -ENOMEM;
603
604 ibdev_dbg(&cm_node->iwdev->ibdev,
605 "CM: caller: %pS cm_node %p cm_id=%p accel=%d state=%d rem_port=0x%04x, loc_port=0x%04x rem_addr=%pI4 loc_addr=%pI4\n",
606 __builtin_return_address(0), cm_node, cm_node->cm_id,
607 cm_node->accelerated, cm_node->state, cm_node->rem_port,
608 cm_node->loc_port, cm_node->rem_addr, cm_node->loc_addr);
609
610 return irdma_schedule_cm_timer(cm_node, sqbuf, IRDMA_TIMER_TYPE_SEND, 0,
611 1);
612 }
613
614 /**
615 * irdma_active_open_err - send event for active side cm error
616 * @cm_node: connection's node
617 * @reset: Flag to send reset or not
618 */
irdma_active_open_err(struct irdma_cm_node * cm_node,bool reset)619 static void irdma_active_open_err(struct irdma_cm_node *cm_node, bool reset)
620 {
621 trace_irdma_active_open_err(cm_node, reset,
622 __builtin_return_address(0));
623 irdma_cleanup_retrans_entry(cm_node);
624 cm_node->cm_core->stats_connect_errs++;
625 if (reset) {
626 ibdev_dbg(&cm_node->iwdev->ibdev,
627 "CM: cm_node=%p state=%d\n", cm_node,
628 cm_node->state);
629 refcount_inc(&cm_node->refcnt);
630 irdma_send_reset(cm_node);
631 }
632
633 cm_node->state = IRDMA_CM_STATE_CLOSED;
634 irdma_create_event(cm_node, IRDMA_CM_EVENT_ABORTED);
635 }
636
637 /**
638 * irdma_passive_open_err - handle passive side cm error
639 * @cm_node: connection's node
640 * @reset: send reset or just free cm_node
641 */
irdma_passive_open_err(struct irdma_cm_node * cm_node,bool reset)642 static void irdma_passive_open_err(struct irdma_cm_node *cm_node, bool reset)
643 {
644 irdma_cleanup_retrans_entry(cm_node);
645 cm_node->cm_core->stats_passive_errs++;
646 cm_node->state = IRDMA_CM_STATE_CLOSED;
647 ibdev_dbg(&cm_node->iwdev->ibdev, "CM: cm_node=%p state =%d\n",
648 cm_node, cm_node->state);
649 trace_irdma_passive_open_err(cm_node, reset,
650 __builtin_return_address(0));
651 if (reset)
652 irdma_send_reset(cm_node);
653 else
654 irdma_rem_ref_cm_node(cm_node);
655 }
656
657 /**
658 * irdma_event_connect_error - to create connect error event
659 * @event: cm information for connect event
660 */
irdma_event_connect_error(struct irdma_cm_event * event)661 static void irdma_event_connect_error(struct irdma_cm_event *event)
662 {
663 struct irdma_qp *iwqp;
664 struct iw_cm_id *cm_id;
665
666 cm_id = event->cm_node->cm_id;
667 if (!cm_id)
668 return;
669
670 iwqp = cm_id->provider_data;
671
672 if (!iwqp || !iwqp->iwdev)
673 return;
674
675 iwqp->cm_id = NULL;
676 cm_id->provider_data = NULL;
677 irdma_send_cm_event(event->cm_node, cm_id, IW_CM_EVENT_CONNECT_REPLY,
678 -ECONNRESET);
679 irdma_rem_ref_cm_node(event->cm_node);
680 }
681
682 /**
683 * irdma_process_options - process options from TCP header
684 * @cm_node: connection's node
685 * @optionsloc: point to start of options
686 * @optionsize: size of all options
687 * @syn_pkt: flag if syn packet
688 */
irdma_process_options(struct irdma_cm_node * cm_node,u8 * optionsloc,u32 optionsize,u32 syn_pkt)689 static int irdma_process_options(struct irdma_cm_node *cm_node, u8 *optionsloc,
690 u32 optionsize, u32 syn_pkt)
691 {
692 u32 tmp;
693 u32 offset = 0;
694 union all_known_options *all_options;
695 char got_mss_option = 0;
696
697 while (offset < optionsize) {
698 all_options = (union all_known_options *)(optionsloc + offset);
699 switch (all_options->base.optionnum) {
700 case OPTION_NUM_EOL:
701 offset = optionsize;
702 break;
703 case OPTION_NUM_NONE:
704 offset += 1;
705 continue;
706 case OPTION_NUM_MSS:
707 ibdev_dbg(&cm_node->iwdev->ibdev,
708 "CM: MSS Length: %d Offset: %d Size: %d\n",
709 all_options->mss.len, offset, optionsize);
710 got_mss_option = 1;
711 if (all_options->mss.len != 4)
712 return -EINVAL;
713 tmp = ntohs(all_options->mss.mss);
714 if ((cm_node->ipv4 &&
715 (tmp + IRDMA_MTU_TO_MSS_IPV4) < IRDMA_MIN_MTU_IPV4) ||
716 (!cm_node->ipv4 &&
717 (tmp + IRDMA_MTU_TO_MSS_IPV6) < IRDMA_MIN_MTU_IPV6))
718 return -EINVAL;
719 if (tmp < cm_node->tcp_cntxt.mss)
720 cm_node->tcp_cntxt.mss = tmp;
721 break;
722 case OPTION_NUM_WINDOW_SCALE:
723 cm_node->tcp_cntxt.snd_wscale =
724 all_options->windowscale.shiftcount;
725 break;
726 default:
727 ibdev_dbg(&cm_node->iwdev->ibdev,
728 "CM: Unsupported TCP Option: %x\n",
729 all_options->base.optionnum);
730 break;
731 }
732 offset += all_options->base.len;
733 }
734 if (!got_mss_option && syn_pkt)
735 cm_node->tcp_cntxt.mss = IRDMA_CM_DEFAULT_MSS;
736
737 return 0;
738 }
739
740 /**
741 * irdma_handle_tcp_options - setup TCP context info after parsing TCP options
742 * @cm_node: connection's node
743 * @tcph: pointer tcp header
744 * @optionsize: size of options rcvd
745 * @passive: active or passive flag
746 */
irdma_handle_tcp_options(struct irdma_cm_node * cm_node,struct tcphdr * tcph,int optionsize,int passive)747 static int irdma_handle_tcp_options(struct irdma_cm_node *cm_node,
748 struct tcphdr *tcph, int optionsize,
749 int passive)
750 {
751 u8 *optionsloc = (u8 *)&tcph[1];
752 int ret;
753
754 if (optionsize) {
755 ret = irdma_process_options(cm_node, optionsloc, optionsize,
756 (u32)tcph->syn);
757 if (ret) {
758 ibdev_dbg(&cm_node->iwdev->ibdev,
759 "CM: Node %p, Sending Reset\n", cm_node);
760 if (passive)
761 irdma_passive_open_err(cm_node, true);
762 else
763 irdma_active_open_err(cm_node, true);
764 return ret;
765 }
766 }
767
768 cm_node->tcp_cntxt.snd_wnd = ntohs(tcph->window)
769 << cm_node->tcp_cntxt.snd_wscale;
770
771 if (cm_node->tcp_cntxt.snd_wnd > cm_node->tcp_cntxt.max_snd_wnd)
772 cm_node->tcp_cntxt.max_snd_wnd = cm_node->tcp_cntxt.snd_wnd;
773
774 return 0;
775 }
776
777 /**
778 * irdma_build_mpa_v1 - build a MPA V1 frame
779 * @cm_node: connection's node
780 * @start_addr: address where to build frame
781 * @mpa_key: to do read0 or write0
782 */
irdma_build_mpa_v1(struct irdma_cm_node * cm_node,void * start_addr,u8 mpa_key)783 static void irdma_build_mpa_v1(struct irdma_cm_node *cm_node, void *start_addr,
784 u8 mpa_key)
785 {
786 struct ietf_mpa_v1 *mpa_frame = start_addr;
787
788 switch (mpa_key) {
789 case MPA_KEY_REQUEST:
790 memcpy(mpa_frame->key, IEFT_MPA_KEY_REQ, IETF_MPA_KEY_SIZE);
791 break;
792 case MPA_KEY_REPLY:
793 memcpy(mpa_frame->key, IEFT_MPA_KEY_REP, IETF_MPA_KEY_SIZE);
794 break;
795 default:
796 break;
797 }
798 mpa_frame->flags = IETF_MPA_FLAGS_CRC;
799 mpa_frame->rev = cm_node->mpa_frame_rev;
800 mpa_frame->priv_data_len = htons(cm_node->pdata.size);
801 }
802
803 /**
804 * irdma_build_mpa_v2 - build a MPA V2 frame
805 * @cm_node: connection's node
806 * @start_addr: buffer start address
807 * @mpa_key: to do read0 or write0
808 */
irdma_build_mpa_v2(struct irdma_cm_node * cm_node,void * start_addr,u8 mpa_key)809 static void irdma_build_mpa_v2(struct irdma_cm_node *cm_node, void *start_addr,
810 u8 mpa_key)
811 {
812 struct ietf_mpa_v2 *mpa_frame = start_addr;
813 struct ietf_rtr_msg *rtr_msg = &mpa_frame->rtr_msg;
814 u16 ctrl_ird, ctrl_ord;
815
816 /* initialize the upper 5 bytes of the frame */
817 irdma_build_mpa_v1(cm_node, start_addr, mpa_key);
818 mpa_frame->flags |= IETF_MPA_V2_FLAG;
819 if (cm_node->iwdev->iw_ooo) {
820 mpa_frame->flags |= IETF_MPA_FLAGS_MARKERS;
821 cm_node->rcv_mark_en = true;
822 }
823 mpa_frame->priv_data_len = cpu_to_be16(be16_to_cpu(mpa_frame->priv_data_len) +
824 IETF_RTR_MSG_SIZE);
825
826 /* initialize RTR msg */
827 if (cm_node->mpav2_ird_ord == IETF_NO_IRD_ORD) {
828 ctrl_ird = IETF_NO_IRD_ORD;
829 ctrl_ord = IETF_NO_IRD_ORD;
830 } else {
831 ctrl_ird = (cm_node->ird_size > IETF_NO_IRD_ORD) ?
832 IETF_NO_IRD_ORD :
833 cm_node->ird_size;
834 ctrl_ord = (cm_node->ord_size > IETF_NO_IRD_ORD) ?
835 IETF_NO_IRD_ORD :
836 cm_node->ord_size;
837 }
838 ctrl_ird |= IETF_PEER_TO_PEER;
839
840 switch (mpa_key) {
841 case MPA_KEY_REQUEST:
842 ctrl_ord |= IETF_RDMA0_WRITE;
843 ctrl_ord |= IETF_RDMA0_READ;
844 break;
845 case MPA_KEY_REPLY:
846 switch (cm_node->send_rdma0_op) {
847 case SEND_RDMA_WRITE_ZERO:
848 ctrl_ord |= IETF_RDMA0_WRITE;
849 break;
850 case SEND_RDMA_READ_ZERO:
851 ctrl_ord |= IETF_RDMA0_READ;
852 break;
853 }
854 break;
855 default:
856 break;
857 }
858 rtr_msg->ctrl_ird = htons(ctrl_ird);
859 rtr_msg->ctrl_ord = htons(ctrl_ord);
860 }
861
862 /**
863 * irdma_cm_build_mpa_frame - build mpa frame for mpa version 1 or version 2
864 * @cm_node: connection's node
865 * @mpa: mpa: data buffer
866 * @mpa_key: to do read0 or write0
867 */
irdma_cm_build_mpa_frame(struct irdma_cm_node * cm_node,struct irdma_kmem_info * mpa,u8 mpa_key)868 static int irdma_cm_build_mpa_frame(struct irdma_cm_node *cm_node,
869 struct irdma_kmem_info *mpa, u8 mpa_key)
870 {
871 int hdr_len = 0;
872
873 switch (cm_node->mpa_frame_rev) {
874 case IETF_MPA_V1:
875 hdr_len = sizeof(struct ietf_mpa_v1);
876 irdma_build_mpa_v1(cm_node, mpa->addr, mpa_key);
877 break;
878 case IETF_MPA_V2:
879 hdr_len = sizeof(struct ietf_mpa_v2);
880 irdma_build_mpa_v2(cm_node, mpa->addr, mpa_key);
881 break;
882 default:
883 break;
884 }
885
886 return hdr_len;
887 }
888
889 /**
890 * irdma_send_mpa_request - active node send mpa request to passive node
891 * @cm_node: connection's node
892 */
irdma_send_mpa_request(struct irdma_cm_node * cm_node)893 static int irdma_send_mpa_request(struct irdma_cm_node *cm_node)
894 {
895 struct irdma_puda_buf *sqbuf;
896
897 cm_node->mpa_hdr.addr = &cm_node->mpa_v2_frame;
898 cm_node->mpa_hdr.size = irdma_cm_build_mpa_frame(cm_node,
899 &cm_node->mpa_hdr,
900 MPA_KEY_REQUEST);
901 if (!cm_node->mpa_hdr.size) {
902 ibdev_dbg(&cm_node->iwdev->ibdev,
903 "CM: mpa size = %d\n", cm_node->mpa_hdr.size);
904 return -EINVAL;
905 }
906
907 sqbuf = cm_node->cm_core->form_cm_frame(cm_node, NULL,
908 &cm_node->mpa_hdr,
909 &cm_node->pdata, SET_ACK);
910 if (!sqbuf)
911 return -ENOMEM;
912
913 return irdma_schedule_cm_timer(cm_node, sqbuf, IRDMA_TIMER_TYPE_SEND, 1,
914 0);
915 }
916
917 /**
918 * irdma_send_mpa_reject -
919 * @cm_node: connection's node
920 * @pdata: reject data for connection
921 * @plen: length of reject data
922 */
irdma_send_mpa_reject(struct irdma_cm_node * cm_node,const void * pdata,u8 plen)923 static int irdma_send_mpa_reject(struct irdma_cm_node *cm_node,
924 const void *pdata, u8 plen)
925 {
926 struct irdma_puda_buf *sqbuf;
927 struct irdma_mpa_priv_info priv_info;
928
929 cm_node->mpa_hdr.addr = &cm_node->mpa_v2_frame;
930 cm_node->mpa_hdr.size = irdma_cm_build_mpa_frame(cm_node,
931 &cm_node->mpa_hdr,
932 MPA_KEY_REPLY);
933
934 cm_node->mpa_frame.flags |= IETF_MPA_FLAGS_REJECT;
935 priv_info.addr = pdata;
936 priv_info.size = plen;
937
938 sqbuf = cm_node->cm_core->form_cm_frame(cm_node, NULL,
939 &cm_node->mpa_hdr, &priv_info,
940 SET_ACK | SET_FIN);
941 if (!sqbuf)
942 return -ENOMEM;
943
944 cm_node->state = IRDMA_CM_STATE_FIN_WAIT1;
945
946 return irdma_schedule_cm_timer(cm_node, sqbuf, IRDMA_TIMER_TYPE_SEND, 1,
947 0);
948 }
949
950 /**
951 * irdma_negotiate_mpa_v2_ird_ord - negotiate MPAv2 IRD/ORD
952 * @cm_node: connection's node
953 * @buf: Data pointer
954 */
irdma_negotiate_mpa_v2_ird_ord(struct irdma_cm_node * cm_node,u8 * buf)955 static int irdma_negotiate_mpa_v2_ird_ord(struct irdma_cm_node *cm_node,
956 u8 *buf)
957 {
958 struct ietf_mpa_v2 *mpa_v2_frame;
959 struct ietf_rtr_msg *rtr_msg;
960 u16 ird_size;
961 u16 ord_size;
962 u16 ctrl_ord;
963 u16 ctrl_ird;
964
965 mpa_v2_frame = (struct ietf_mpa_v2 *)buf;
966 rtr_msg = &mpa_v2_frame->rtr_msg;
967
968 /* parse rtr message */
969 ctrl_ord = ntohs(rtr_msg->ctrl_ord);
970 ctrl_ird = ntohs(rtr_msg->ctrl_ird);
971 ird_size = ctrl_ird & IETF_NO_IRD_ORD;
972 ord_size = ctrl_ord & IETF_NO_IRD_ORD;
973
974 if (!(ctrl_ird & IETF_PEER_TO_PEER))
975 return -EOPNOTSUPP;
976
977 if (ird_size == IETF_NO_IRD_ORD || ord_size == IETF_NO_IRD_ORD) {
978 cm_node->mpav2_ird_ord = IETF_NO_IRD_ORD;
979 goto negotiate_done;
980 }
981
982 if (cm_node->state != IRDMA_CM_STATE_MPAREQ_SENT) {
983 /* responder */
984 if (!ord_size && (ctrl_ord & IETF_RDMA0_READ))
985 cm_node->ird_size = 1;
986 if (cm_node->ord_size > ird_size)
987 cm_node->ord_size = ird_size;
988 } else {
989 /* initiator */
990 if (!ird_size && (ctrl_ord & IETF_RDMA0_READ))
991 /* Remote peer doesn't support RDMA0_READ */
992 return -EOPNOTSUPP;
993
994 if (cm_node->ord_size > ird_size)
995 cm_node->ord_size = ird_size;
996
997 if (cm_node->ird_size < ord_size)
998 /* no resources available */
999 return -EINVAL;
1000 }
1001
1002 negotiate_done:
1003 if (ctrl_ord & IETF_RDMA0_READ)
1004 cm_node->send_rdma0_op = SEND_RDMA_READ_ZERO;
1005 else if (ctrl_ord & IETF_RDMA0_WRITE)
1006 cm_node->send_rdma0_op = SEND_RDMA_WRITE_ZERO;
1007 else
1008 /* Not supported RDMA0 operation */
1009 return -EOPNOTSUPP;
1010
1011 ibdev_dbg(&cm_node->iwdev->ibdev,
1012 "CM: MPAV2 Negotiated ORD: %d, IRD: %d\n",
1013 cm_node->ord_size, cm_node->ird_size);
1014 trace_irdma_negotiate_mpa_v2(cm_node);
1015 return 0;
1016 }
1017
1018 /**
1019 * irdma_parse_mpa - process an IETF MPA frame
1020 * @cm_node: connection's node
1021 * @buf: Data pointer
1022 * @type: to return accept or reject
1023 * @len: Len of mpa buffer
1024 */
irdma_parse_mpa(struct irdma_cm_node * cm_node,u8 * buf,u32 * type,u32 len)1025 static int irdma_parse_mpa(struct irdma_cm_node *cm_node, u8 *buf, u32 *type,
1026 u32 len)
1027 {
1028 struct ietf_mpa_v1 *mpa_frame;
1029 int mpa_hdr_len, priv_data_len, ret;
1030
1031 *type = IRDMA_MPA_REQUEST_ACCEPT;
1032
1033 if (len < sizeof(struct ietf_mpa_v1)) {
1034 ibdev_dbg(&cm_node->iwdev->ibdev,
1035 "CM: ietf buffer small (%x)\n", len);
1036 return -EINVAL;
1037 }
1038
1039 mpa_frame = (struct ietf_mpa_v1 *)buf;
1040 mpa_hdr_len = sizeof(struct ietf_mpa_v1);
1041 priv_data_len = ntohs(mpa_frame->priv_data_len);
1042
1043 if (priv_data_len > IETF_MAX_PRIV_DATA_LEN) {
1044 ibdev_dbg(&cm_node->iwdev->ibdev,
1045 "CM: private_data too big %d\n", priv_data_len);
1046 return -EOVERFLOW;
1047 }
1048
1049 if (mpa_frame->rev != IETF_MPA_V1 && mpa_frame->rev != IETF_MPA_V2) {
1050 ibdev_dbg(&cm_node->iwdev->ibdev,
1051 "CM: unsupported mpa rev = %d\n", mpa_frame->rev);
1052 return -EINVAL;
1053 }
1054
1055 if (mpa_frame->rev > cm_node->mpa_frame_rev) {
1056 ibdev_dbg(&cm_node->iwdev->ibdev, "CM: rev %d\n",
1057 mpa_frame->rev);
1058 return -EINVAL;
1059 }
1060
1061 cm_node->mpa_frame_rev = mpa_frame->rev;
1062 if (cm_node->state != IRDMA_CM_STATE_MPAREQ_SENT) {
1063 if (memcmp(mpa_frame->key, IEFT_MPA_KEY_REQ,
1064 IETF_MPA_KEY_SIZE)) {
1065 ibdev_dbg(&cm_node->iwdev->ibdev,
1066 "CM: Unexpected MPA Key received\n");
1067 return -EINVAL;
1068 }
1069 } else {
1070 if (memcmp(mpa_frame->key, IEFT_MPA_KEY_REP,
1071 IETF_MPA_KEY_SIZE)) {
1072 ibdev_dbg(&cm_node->iwdev->ibdev,
1073 "CM: Unexpected MPA Key received\n");
1074 return -EINVAL;
1075 }
1076 }
1077
1078 if (priv_data_len + mpa_hdr_len > len) {
1079 ibdev_dbg(&cm_node->iwdev->ibdev,
1080 "CM: ietf buffer len(%x + %x != %x)\n",
1081 priv_data_len, mpa_hdr_len, len);
1082 return -EOVERFLOW;
1083 }
1084
1085 if (len > IRDMA_MAX_CM_BUF) {
1086 ibdev_dbg(&cm_node->iwdev->ibdev,
1087 "CM: ietf buffer large len = %d\n", len);
1088 return -EOVERFLOW;
1089 }
1090
1091 switch (mpa_frame->rev) {
1092 case IETF_MPA_V2:
1093 mpa_hdr_len += IETF_RTR_MSG_SIZE;
1094 ret = irdma_negotiate_mpa_v2_ird_ord(cm_node, buf);
1095 if (ret)
1096 return ret;
1097 break;
1098 case IETF_MPA_V1:
1099 default:
1100 break;
1101 }
1102
1103 memcpy(cm_node->pdata_buf, buf + mpa_hdr_len, priv_data_len);
1104 cm_node->pdata.size = priv_data_len;
1105
1106 if (mpa_frame->flags & IETF_MPA_FLAGS_REJECT)
1107 *type = IRDMA_MPA_REQUEST_REJECT;
1108
1109 if (mpa_frame->flags & IETF_MPA_FLAGS_MARKERS)
1110 cm_node->snd_mark_en = true;
1111
1112 return 0;
1113 }
1114
1115 /**
1116 * irdma_schedule_cm_timer
1117 * @cm_node: connection's node
1118 * @sqbuf: buffer to send
1119 * @type: if it is send or close
1120 * @send_retrans: if rexmits to be done
1121 * @close_when_complete: is cm_node to be removed
1122 *
1123 * note - cm_node needs to be protected before calling this. Encase in:
1124 * irdma_rem_ref_cm_node(cm_core, cm_node);
1125 * irdma_schedule_cm_timer(...)
1126 * refcount_inc(&cm_node->refcnt);
1127 */
irdma_schedule_cm_timer(struct irdma_cm_node * cm_node,struct irdma_puda_buf * sqbuf,enum irdma_timer_type type,int send_retrans,int close_when_complete)1128 int irdma_schedule_cm_timer(struct irdma_cm_node *cm_node,
1129 struct irdma_puda_buf *sqbuf,
1130 enum irdma_timer_type type, int send_retrans,
1131 int close_when_complete)
1132 {
1133 struct irdma_sc_vsi *vsi = &cm_node->iwdev->vsi;
1134 struct irdma_cm_core *cm_core = cm_node->cm_core;
1135 struct irdma_timer_entry *new_send;
1136 u32 was_timer_set;
1137 unsigned long flags;
1138
1139 new_send = kzalloc(sizeof(*new_send), GFP_ATOMIC);
1140 if (!new_send) {
1141 if (type != IRDMA_TIMER_TYPE_CLOSE)
1142 irdma_free_sqbuf(vsi, sqbuf);
1143 return -ENOMEM;
1144 }
1145
1146 new_send->retrycount = IRDMA_DEFAULT_RETRYS;
1147 new_send->retranscount = IRDMA_DEFAULT_RETRANS;
1148 new_send->sqbuf = sqbuf;
1149 new_send->timetosend = jiffies;
1150 new_send->type = type;
1151 new_send->send_retrans = send_retrans;
1152 new_send->close_when_complete = close_when_complete;
1153
1154 if (type == IRDMA_TIMER_TYPE_CLOSE) {
1155 new_send->timetosend += (HZ / 10);
1156 if (cm_node->close_entry) {
1157 kfree(new_send);
1158 ibdev_dbg(&cm_node->iwdev->ibdev,
1159 "CM: already close entry\n");
1160 return -EINVAL;
1161 }
1162
1163 cm_node->close_entry = new_send;
1164 } else { /* type == IRDMA_TIMER_TYPE_SEND */
1165 spin_lock_irqsave(&cm_node->retrans_list_lock, flags);
1166 cm_node->send_entry = new_send;
1167 refcount_inc(&cm_node->refcnt);
1168 spin_unlock_irqrestore(&cm_node->retrans_list_lock, flags);
1169 new_send->timetosend = jiffies + IRDMA_RETRY_TIMEOUT;
1170
1171 refcount_inc(&sqbuf->refcount);
1172 irdma_puda_send_buf(vsi->ilq, sqbuf);
1173 if (!send_retrans) {
1174 irdma_cleanup_retrans_entry(cm_node);
1175 if (close_when_complete)
1176 irdma_rem_ref_cm_node(cm_node);
1177 return 0;
1178 }
1179 }
1180
1181 spin_lock_irqsave(&cm_core->ht_lock, flags);
1182 was_timer_set = timer_pending(&cm_core->tcp_timer);
1183
1184 if (!was_timer_set) {
1185 cm_core->tcp_timer.expires = new_send->timetosend;
1186 add_timer(&cm_core->tcp_timer);
1187 }
1188 spin_unlock_irqrestore(&cm_core->ht_lock, flags);
1189
1190 return 0;
1191 }
1192
1193 /**
1194 * irdma_retrans_expired - Could not rexmit the packet
1195 * @cm_node: connection's node
1196 */
irdma_retrans_expired(struct irdma_cm_node * cm_node)1197 static void irdma_retrans_expired(struct irdma_cm_node *cm_node)
1198 {
1199 enum irdma_cm_node_state state = cm_node->state;
1200
1201 cm_node->state = IRDMA_CM_STATE_CLOSED;
1202 switch (state) {
1203 case IRDMA_CM_STATE_SYN_RCVD:
1204 case IRDMA_CM_STATE_CLOSING:
1205 irdma_rem_ref_cm_node(cm_node);
1206 break;
1207 case IRDMA_CM_STATE_FIN_WAIT1:
1208 case IRDMA_CM_STATE_LAST_ACK:
1209 irdma_send_reset(cm_node);
1210 break;
1211 default:
1212 refcount_inc(&cm_node->refcnt);
1213 irdma_send_reset(cm_node);
1214 irdma_create_event(cm_node, IRDMA_CM_EVENT_ABORTED);
1215 break;
1216 }
1217 }
1218
1219 /**
1220 * irdma_handle_close_entry - for handling retry/timeouts
1221 * @cm_node: connection's node
1222 * @rem_node: flag for remove cm_node
1223 */
irdma_handle_close_entry(struct irdma_cm_node * cm_node,u32 rem_node)1224 static void irdma_handle_close_entry(struct irdma_cm_node *cm_node,
1225 u32 rem_node)
1226 {
1227 struct irdma_timer_entry *close_entry = cm_node->close_entry;
1228 struct irdma_qp *iwqp;
1229 unsigned long flags;
1230
1231 if (!close_entry)
1232 return;
1233 iwqp = (struct irdma_qp *)close_entry->sqbuf;
1234 if (iwqp) {
1235 spin_lock_irqsave(&iwqp->lock, flags);
1236 if (iwqp->cm_id) {
1237 iwqp->hw_tcp_state = IRDMA_TCP_STATE_CLOSED;
1238 iwqp->hw_iwarp_state = IRDMA_QP_STATE_ERROR;
1239 iwqp->last_aeq = IRDMA_AE_RESET_SENT;
1240 iwqp->ibqp_state = IB_QPS_ERR;
1241 spin_unlock_irqrestore(&iwqp->lock, flags);
1242 irdma_cm_disconn(iwqp);
1243 } else {
1244 spin_unlock_irqrestore(&iwqp->lock, flags);
1245 }
1246 } else if (rem_node) {
1247 /* TIME_WAIT state */
1248 irdma_rem_ref_cm_node(cm_node);
1249 }
1250
1251 kfree(close_entry);
1252 cm_node->close_entry = NULL;
1253 }
1254
1255 /**
1256 * irdma_cm_timer_tick - system's timer expired callback
1257 * @t: Pointer to timer_list
1258 */
irdma_cm_timer_tick(struct timer_list * t)1259 static void irdma_cm_timer_tick(struct timer_list *t)
1260 {
1261 unsigned long nexttimeout = jiffies + IRDMA_LONG_TIME;
1262 struct irdma_cm_node *cm_node;
1263 struct irdma_timer_entry *send_entry, *close_entry;
1264 struct list_head *list_core_temp;
1265 struct list_head *list_node;
1266 struct irdma_cm_core *cm_core = from_timer(cm_core, t, tcp_timer);
1267 struct irdma_sc_vsi *vsi;
1268 u32 settimer = 0;
1269 unsigned long timetosend;
1270 unsigned long flags;
1271 struct list_head timer_list;
1272
1273 INIT_LIST_HEAD(&timer_list);
1274
1275 rcu_read_lock();
1276 irdma_timer_list_prep(cm_core, &timer_list);
1277 rcu_read_unlock();
1278
1279 list_for_each_safe (list_node, list_core_temp, &timer_list) {
1280 cm_node = container_of(list_node, struct irdma_cm_node,
1281 timer_entry);
1282 close_entry = cm_node->close_entry;
1283
1284 if (close_entry) {
1285 if (time_after(close_entry->timetosend, jiffies)) {
1286 if (nexttimeout > close_entry->timetosend ||
1287 !settimer) {
1288 nexttimeout = close_entry->timetosend;
1289 settimer = 1;
1290 }
1291 } else {
1292 irdma_handle_close_entry(cm_node, 1);
1293 }
1294 }
1295
1296 spin_lock_irqsave(&cm_node->retrans_list_lock, flags);
1297
1298 send_entry = cm_node->send_entry;
1299 if (!send_entry)
1300 goto done;
1301 if (time_after(send_entry->timetosend, jiffies)) {
1302 if (cm_node->state != IRDMA_CM_STATE_OFFLOADED) {
1303 if (nexttimeout > send_entry->timetosend ||
1304 !settimer) {
1305 nexttimeout = send_entry->timetosend;
1306 settimer = 1;
1307 }
1308 } else {
1309 irdma_free_retrans_entry(cm_node);
1310 }
1311 goto done;
1312 }
1313
1314 if (cm_node->state == IRDMA_CM_STATE_OFFLOADED ||
1315 cm_node->state == IRDMA_CM_STATE_CLOSED) {
1316 irdma_free_retrans_entry(cm_node);
1317 goto done;
1318 }
1319
1320 if (!send_entry->retranscount || !send_entry->retrycount) {
1321 irdma_free_retrans_entry(cm_node);
1322
1323 spin_unlock_irqrestore(&cm_node->retrans_list_lock,
1324 flags);
1325 irdma_retrans_expired(cm_node);
1326 cm_node->state = IRDMA_CM_STATE_CLOSED;
1327 spin_lock_irqsave(&cm_node->retrans_list_lock, flags);
1328 goto done;
1329 }
1330 spin_unlock_irqrestore(&cm_node->retrans_list_lock, flags);
1331
1332 vsi = &cm_node->iwdev->vsi;
1333 if (!cm_node->ack_rcvd) {
1334 refcount_inc(&send_entry->sqbuf->refcount);
1335 irdma_puda_send_buf(vsi->ilq, send_entry->sqbuf);
1336 cm_node->cm_core->stats_pkt_retrans++;
1337 }
1338
1339 spin_lock_irqsave(&cm_node->retrans_list_lock, flags);
1340 if (send_entry->send_retrans) {
1341 send_entry->retranscount--;
1342 timetosend = (IRDMA_RETRY_TIMEOUT <<
1343 (IRDMA_DEFAULT_RETRANS -
1344 send_entry->retranscount));
1345
1346 send_entry->timetosend = jiffies +
1347 min(timetosend, IRDMA_MAX_TIMEOUT);
1348 if (nexttimeout > send_entry->timetosend || !settimer) {
1349 nexttimeout = send_entry->timetosend;
1350 settimer = 1;
1351 }
1352 } else {
1353 int close_when_complete;
1354
1355 close_when_complete = send_entry->close_when_complete;
1356 irdma_free_retrans_entry(cm_node);
1357 if (close_when_complete)
1358 irdma_rem_ref_cm_node(cm_node);
1359 }
1360 done:
1361 spin_unlock_irqrestore(&cm_node->retrans_list_lock, flags);
1362 irdma_rem_ref_cm_node(cm_node);
1363 }
1364
1365 if (settimer) {
1366 spin_lock_irqsave(&cm_core->ht_lock, flags);
1367 if (!timer_pending(&cm_core->tcp_timer)) {
1368 cm_core->tcp_timer.expires = nexttimeout;
1369 add_timer(&cm_core->tcp_timer);
1370 }
1371 spin_unlock_irqrestore(&cm_core->ht_lock, flags);
1372 }
1373 }
1374
1375 /**
1376 * irdma_send_syn - send SYN packet
1377 * @cm_node: connection's node
1378 * @sendack: flag to set ACK bit or not
1379 */
irdma_send_syn(struct irdma_cm_node * cm_node,u32 sendack)1380 int irdma_send_syn(struct irdma_cm_node *cm_node, u32 sendack)
1381 {
1382 struct irdma_puda_buf *sqbuf;
1383 int flags = SET_SYN;
1384 char optionsbuf[sizeof(struct option_mss) +
1385 sizeof(struct option_windowscale) +
1386 sizeof(struct option_base) + TCP_OPTIONS_PADDING];
1387 struct irdma_kmem_info opts;
1388 int optionssize = 0;
1389 /* Sending MSS option */
1390 union all_known_options *options;
1391
1392 opts.addr = optionsbuf;
1393 if (!cm_node)
1394 return -EINVAL;
1395
1396 options = (union all_known_options *)&optionsbuf[optionssize];
1397 options->mss.optionnum = OPTION_NUM_MSS;
1398 options->mss.len = sizeof(struct option_mss);
1399 options->mss.mss = htons(cm_node->tcp_cntxt.mss);
1400 optionssize += sizeof(struct option_mss);
1401
1402 options = (union all_known_options *)&optionsbuf[optionssize];
1403 options->windowscale.optionnum = OPTION_NUM_WINDOW_SCALE;
1404 options->windowscale.len = sizeof(struct option_windowscale);
1405 options->windowscale.shiftcount = cm_node->tcp_cntxt.rcv_wscale;
1406 optionssize += sizeof(struct option_windowscale);
1407 options = (union all_known_options *)&optionsbuf[optionssize];
1408 options->eol = OPTION_NUM_EOL;
1409 optionssize += 1;
1410
1411 if (sendack)
1412 flags |= SET_ACK;
1413
1414 opts.size = optionssize;
1415
1416 sqbuf = cm_node->cm_core->form_cm_frame(cm_node, &opts, NULL, NULL,
1417 flags);
1418 if (!sqbuf)
1419 return -ENOMEM;
1420
1421 return irdma_schedule_cm_timer(cm_node, sqbuf, IRDMA_TIMER_TYPE_SEND, 1,
1422 0);
1423 }
1424
1425 /**
1426 * irdma_send_ack - Send ACK packet
1427 * @cm_node: connection's node
1428 */
irdma_send_ack(struct irdma_cm_node * cm_node)1429 void irdma_send_ack(struct irdma_cm_node *cm_node)
1430 {
1431 struct irdma_puda_buf *sqbuf;
1432 struct irdma_sc_vsi *vsi = &cm_node->iwdev->vsi;
1433
1434 sqbuf = cm_node->cm_core->form_cm_frame(cm_node, NULL, NULL, NULL,
1435 SET_ACK);
1436 if (sqbuf)
1437 irdma_puda_send_buf(vsi->ilq, sqbuf);
1438 }
1439
1440 /**
1441 * irdma_send_fin - Send FIN pkt
1442 * @cm_node: connection's node
1443 */
irdma_send_fin(struct irdma_cm_node * cm_node)1444 static int irdma_send_fin(struct irdma_cm_node *cm_node)
1445 {
1446 struct irdma_puda_buf *sqbuf;
1447
1448 sqbuf = cm_node->cm_core->form_cm_frame(cm_node, NULL, NULL, NULL,
1449 SET_ACK | SET_FIN);
1450 if (!sqbuf)
1451 return -ENOMEM;
1452
1453 return irdma_schedule_cm_timer(cm_node, sqbuf, IRDMA_TIMER_TYPE_SEND, 1,
1454 0);
1455 }
1456
1457 /**
1458 * irdma_find_listener - find a cm node listening on this addr-port pair
1459 * @cm_core: cm's core
1460 * @dst_addr: listener ip addr
1461 * @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 *
irdma_find_listener(struct irdma_cm_core * cm_core,u32 * dst_addr,bool ipv4,u16 dst_port,u16 vlan_id,enum irdma_cm_listener_state listener_state)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 */
irdma_del_multiple_qhash(struct irdma_device * iwdev,struct irdma_cm_info * cm_info,struct irdma_cm_listener * cm_parent_listen_node)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
irdma_iw_get_vlan_prio(u32 * loc_addr,u8 prio,bool ipv4)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 */
irdma_get_vlan_mac_ipv6(u32 * addr,u16 * vlan_id,u8 * mac)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 */
irdma_get_vlan_ipv4(u32 * addr)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 */
irdma_add_mqh_6(struct irdma_device * iwdev,struct irdma_cm_info * cm_info,struct irdma_cm_listener * cm_parent_listen_node)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 */
irdma_add_mqh_4(struct irdma_device * iwdev,struct irdma_cm_info * cm_info,struct irdma_cm_listener * cm_parent_listen_node)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 */
irdma_add_mqh(struct irdma_device * iwdev,struct irdma_cm_info * cm_info,struct irdma_cm_listener * cm_listen_node)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 */
irdma_reset_list_prep(struct irdma_cm_core * cm_core,struct irdma_cm_listener * listener,struct list_head * reset_list)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 */
irdma_dec_refcnt_listen(struct irdma_cm_core * cm_core,struct irdma_cm_listener * listener,int free_hanging_nodes,bool apbvt_del)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 */
irdma_cm_del_listen(struct irdma_cm_core * cm_core,struct irdma_cm_listener * listener,bool apbvt_del)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 */
irdma_addr_resolve_neigh(struct irdma_device * iwdev,u32 src_ip,u32 dst_ip,int arpindex)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 if (IS_ERR(rt)) {
1990 ibdev_dbg(&iwdev->ibdev, "CM: ip_route_output fail\n");
1991 return -EINVAL;
1992 }
1993
1994 neigh = dst_neigh_lookup(&rt->dst, &dst_ipaddr);
1995 if (!neigh)
1996 goto exit;
1997
1998 if (neigh->nud_state & NUD_VALID)
1999 rc = irdma_add_arp(iwdev->rf, &dst_ip, true, neigh->ha);
2000 else
2001 neigh_event_send(neigh, NULL);
2002 if (neigh)
2003 neigh_release(neigh);
2004 exit:
2005 ip_rt_put(rt);
2006
2007 return rc;
2008 }
2009
2010 /**
2011 * irdma_get_dst_ipv6 - get destination cache entry via ipv6 lookup
2012 * @src_addr: local ipv6 sock address
2013 * @dst_addr: destination ipv6 sock address
2014 */
irdma_get_dst_ipv6(struct sockaddr_in6 * src_addr,struct sockaddr_in6 * dst_addr)2015 static struct dst_entry *irdma_get_dst_ipv6(struct sockaddr_in6 *src_addr,
2016 struct sockaddr_in6 *dst_addr)
2017 {
2018 struct dst_entry *dst = NULL;
2019
2020 if ((IS_ENABLED(CONFIG_IPV6))) {
2021 struct flowi6 fl6 = {};
2022
2023 fl6.daddr = dst_addr->sin6_addr;
2024 fl6.saddr = src_addr->sin6_addr;
2025 if (ipv6_addr_type(&fl6.daddr) & IPV6_ADDR_LINKLOCAL)
2026 fl6.flowi6_oif = dst_addr->sin6_scope_id;
2027
2028 dst = ip6_route_output(&init_net, NULL, &fl6);
2029 }
2030
2031 return dst;
2032 }
2033
2034 /**
2035 * irdma_addr_resolve_neigh_ipv6 - resolve neighbor ipv6 address
2036 * @iwdev: iwarp device structure
2037 * @src: local ip address
2038 * @dest: remote ip address
2039 * @arpindex: if there is an arp entry
2040 */
irdma_addr_resolve_neigh_ipv6(struct irdma_device * iwdev,u32 * src,u32 * dest,int arpindex)2041 static int irdma_addr_resolve_neigh_ipv6(struct irdma_device *iwdev, u32 *src,
2042 u32 *dest, int arpindex)
2043 {
2044 struct neighbour *neigh;
2045 int rc = arpindex;
2046 struct dst_entry *dst;
2047 struct sockaddr_in6 dst_addr = {};
2048 struct sockaddr_in6 src_addr = {};
2049
2050 dst_addr.sin6_family = AF_INET6;
2051 irdma_copy_ip_htonl(dst_addr.sin6_addr.in6_u.u6_addr32, dest);
2052 src_addr.sin6_family = AF_INET6;
2053 irdma_copy_ip_htonl(src_addr.sin6_addr.in6_u.u6_addr32, src);
2054 dst = irdma_get_dst_ipv6(&src_addr, &dst_addr);
2055 if (!dst || dst->error) {
2056 if (dst) {
2057 dst_release(dst);
2058 ibdev_dbg(&iwdev->ibdev,
2059 "CM: ip6_route_output returned dst->error = %d\n",
2060 dst->error);
2061 }
2062 return -EINVAL;
2063 }
2064
2065 neigh = dst_neigh_lookup(dst, dst_addr.sin6_addr.in6_u.u6_addr32);
2066 if (!neigh)
2067 goto exit;
2068
2069 ibdev_dbg(&iwdev->ibdev, "CM: dst_neigh_lookup MAC=%pM\n",
2070 neigh->ha);
2071
2072 trace_irdma_addr_resolve(iwdev, neigh->ha);
2073
2074 if (neigh->nud_state & NUD_VALID)
2075 rc = irdma_add_arp(iwdev->rf, dest, false, neigh->ha);
2076 else
2077 neigh_event_send(neigh, NULL);
2078 if (neigh)
2079 neigh_release(neigh);
2080 exit:
2081 dst_release(dst);
2082
2083 return rc;
2084 }
2085
2086 /**
2087 * irdma_find_node - find a cm node that matches the reference cm node
2088 * @cm_core: cm's core
2089 * @rem_port: remote tcp port num
2090 * @rem_addr: remote ip addr
2091 * @loc_port: local tcp port num
2092 * @loc_addr: local ip addr
2093 * @vlan_id: local VLAN ID
2094 */
irdma_find_node(struct irdma_cm_core * cm_core,u16 rem_port,u32 * rem_addr,u16 loc_port,u32 * loc_addr,u16 vlan_id)2095 struct irdma_cm_node *irdma_find_node(struct irdma_cm_core *cm_core,
2096 u16 rem_port, u32 *rem_addr, u16 loc_port,
2097 u32 *loc_addr, u16 vlan_id)
2098 {
2099 struct irdma_cm_node *cm_node;
2100 u32 key = (rem_port << 16) | loc_port;
2101
2102 rcu_read_lock();
2103 hash_for_each_possible_rcu(cm_core->cm_hash_tbl, cm_node, list, key) {
2104 if (cm_node->vlan_id == vlan_id &&
2105 cm_node->loc_port == loc_port && cm_node->rem_port == rem_port &&
2106 !memcmp(cm_node->loc_addr, loc_addr, sizeof(cm_node->loc_addr)) &&
2107 !memcmp(cm_node->rem_addr, rem_addr, sizeof(cm_node->rem_addr))) {
2108 if (!refcount_inc_not_zero(&cm_node->refcnt))
2109 goto exit;
2110 rcu_read_unlock();
2111 trace_irdma_find_node(cm_node, 0, NULL);
2112 return cm_node;
2113 }
2114 }
2115
2116 exit:
2117 rcu_read_unlock();
2118
2119 /* no owner node */
2120 return NULL;
2121 }
2122
2123 /**
2124 * irdma_add_hte_node - add a cm node to the hash table
2125 * @cm_core: cm's core
2126 * @cm_node: connection's node
2127 */
irdma_add_hte_node(struct irdma_cm_core * cm_core,struct irdma_cm_node * cm_node)2128 static void irdma_add_hte_node(struct irdma_cm_core *cm_core,
2129 struct irdma_cm_node *cm_node)
2130 {
2131 unsigned long flags;
2132 u32 key = (cm_node->rem_port << 16) | cm_node->loc_port;
2133
2134 spin_lock_irqsave(&cm_core->ht_lock, flags);
2135 hash_add_rcu(cm_core->cm_hash_tbl, &cm_node->list, key);
2136 spin_unlock_irqrestore(&cm_core->ht_lock, flags);
2137 }
2138
2139 /**
2140 * irdma_ipv4_is_lpb - check if loopback
2141 * @loc_addr: local addr to compare
2142 * @rem_addr: remote address
2143 */
irdma_ipv4_is_lpb(u32 loc_addr,u32 rem_addr)2144 bool irdma_ipv4_is_lpb(u32 loc_addr, u32 rem_addr)
2145 {
2146 return ipv4_is_loopback(htonl(rem_addr)) || (loc_addr == rem_addr);
2147 }
2148
2149 /**
2150 * irdma_ipv6_is_lpb - check if loopback
2151 * @loc_addr: local addr to compare
2152 * @rem_addr: remote address
2153 */
irdma_ipv6_is_lpb(u32 * loc_addr,u32 * rem_addr)2154 bool irdma_ipv6_is_lpb(u32 *loc_addr, u32 *rem_addr)
2155 {
2156 struct in6_addr raddr6;
2157
2158 irdma_copy_ip_htonl(raddr6.in6_u.u6_addr32, rem_addr);
2159
2160 return !memcmp(loc_addr, rem_addr, 16) || ipv6_addr_loopback(&raddr6);
2161 }
2162
2163 /**
2164 * irdma_cm_create_ah - create a cm address handle
2165 * @cm_node: The connection manager node to create AH for
2166 * @wait: Provides option to wait for ah creation or not
2167 */
irdma_cm_create_ah(struct irdma_cm_node * cm_node,bool wait)2168 static int irdma_cm_create_ah(struct irdma_cm_node *cm_node, bool wait)
2169 {
2170 struct irdma_ah_info ah_info = {};
2171 struct irdma_device *iwdev = cm_node->iwdev;
2172
2173 ether_addr_copy(ah_info.mac_addr, iwdev->netdev->dev_addr);
2174
2175 ah_info.hop_ttl = 0x40;
2176 ah_info.tc_tos = cm_node->tos;
2177 ah_info.vsi = &iwdev->vsi;
2178
2179 if (cm_node->ipv4) {
2180 ah_info.ipv4_valid = true;
2181 ah_info.dest_ip_addr[0] = cm_node->rem_addr[0];
2182 ah_info.src_ip_addr[0] = cm_node->loc_addr[0];
2183 ah_info.do_lpbk = irdma_ipv4_is_lpb(ah_info.src_ip_addr[0],
2184 ah_info.dest_ip_addr[0]);
2185 } else {
2186 memcpy(ah_info.dest_ip_addr, cm_node->rem_addr,
2187 sizeof(ah_info.dest_ip_addr));
2188 memcpy(ah_info.src_ip_addr, cm_node->loc_addr,
2189 sizeof(ah_info.src_ip_addr));
2190 ah_info.do_lpbk = irdma_ipv6_is_lpb(ah_info.src_ip_addr,
2191 ah_info.dest_ip_addr);
2192 }
2193
2194 ah_info.vlan_tag = cm_node->vlan_id;
2195 if (cm_node->vlan_id < VLAN_N_VID) {
2196 ah_info.insert_vlan_tag = 1;
2197 ah_info.vlan_tag |= cm_node->user_pri << VLAN_PRIO_SHIFT;
2198 }
2199
2200 ah_info.dst_arpindex =
2201 irdma_arp_table(iwdev->rf, ah_info.dest_ip_addr,
2202 ah_info.ipv4_valid, NULL, IRDMA_ARP_RESOLVE);
2203
2204 if (irdma_puda_create_ah(&iwdev->rf->sc_dev, &ah_info, wait,
2205 IRDMA_PUDA_RSRC_TYPE_ILQ, cm_node,
2206 &cm_node->ah))
2207 return -ENOMEM;
2208
2209 trace_irdma_create_ah(cm_node);
2210 return 0;
2211 }
2212
2213 /**
2214 * irdma_cm_free_ah - free a cm address handle
2215 * @cm_node: The connection manager node to create AH for
2216 */
irdma_cm_free_ah(struct irdma_cm_node * cm_node)2217 static void irdma_cm_free_ah(struct irdma_cm_node *cm_node)
2218 {
2219 struct irdma_device *iwdev = cm_node->iwdev;
2220
2221 trace_irdma_cm_free_ah(cm_node);
2222 irdma_puda_free_ah(&iwdev->rf->sc_dev, cm_node->ah);
2223 cm_node->ah = NULL;
2224 }
2225
2226 /**
2227 * irdma_make_cm_node - create a new instance of a cm node
2228 * @cm_core: cm's core
2229 * @iwdev: iwarp device structure
2230 * @cm_info: quad info for connection
2231 * @listener: passive connection's listener
2232 */
2233 static struct irdma_cm_node *
irdma_make_cm_node(struct irdma_cm_core * cm_core,struct irdma_device * iwdev,struct irdma_cm_info * cm_info,struct irdma_cm_listener * listener)2234 irdma_make_cm_node(struct irdma_cm_core *cm_core, struct irdma_device *iwdev,
2235 struct irdma_cm_info *cm_info,
2236 struct irdma_cm_listener *listener)
2237 {
2238 struct irdma_cm_node *cm_node;
2239 int oldarpindex;
2240 int arpindex;
2241 struct net_device *netdev = iwdev->netdev;
2242
2243 /* create an hte and cm_node for this instance */
2244 cm_node = kzalloc(sizeof(*cm_node), GFP_ATOMIC);
2245 if (!cm_node)
2246 return NULL;
2247
2248 /* set our node specific transport info */
2249 cm_node->ipv4 = cm_info->ipv4;
2250 cm_node->vlan_id = cm_info->vlan_id;
2251 if (cm_node->vlan_id >= VLAN_N_VID && iwdev->dcb_vlan_mode)
2252 cm_node->vlan_id = 0;
2253 cm_node->tos = cm_info->tos;
2254 cm_node->user_pri = cm_info->user_pri;
2255 if (listener) {
2256 if (listener->tos != cm_info->tos)
2257 ibdev_warn(&iwdev->ibdev,
2258 "application TOS[%d] and remote client TOS[%d] mismatch\n",
2259 listener->tos, cm_info->tos);
2260 if (iwdev->vsi.dscp_mode) {
2261 cm_node->user_pri = listener->user_pri;
2262 } else {
2263 cm_node->tos = max(listener->tos, cm_info->tos);
2264 cm_node->user_pri = rt_tos2priority(cm_node->tos);
2265 cm_node->user_pri =
2266 irdma_iw_get_vlan_prio(cm_info->loc_addr,
2267 cm_node->user_pri,
2268 cm_info->ipv4);
2269 }
2270 ibdev_dbg(&iwdev->ibdev,
2271 "DCB: listener: TOS:[%d] UP:[%d]\n", cm_node->tos,
2272 cm_node->user_pri);
2273 trace_irdma_listener_tos(iwdev, cm_node->tos,
2274 cm_node->user_pri);
2275 }
2276 memcpy(cm_node->loc_addr, cm_info->loc_addr, sizeof(cm_node->loc_addr));
2277 memcpy(cm_node->rem_addr, cm_info->rem_addr, sizeof(cm_node->rem_addr));
2278 cm_node->loc_port = cm_info->loc_port;
2279 cm_node->rem_port = cm_info->rem_port;
2280
2281 cm_node->mpa_frame_rev = IRDMA_CM_DEFAULT_MPA_VER;
2282 cm_node->send_rdma0_op = SEND_RDMA_READ_ZERO;
2283 cm_node->iwdev = iwdev;
2284 cm_node->dev = &iwdev->rf->sc_dev;
2285
2286 cm_node->ird_size = cm_node->dev->hw_attrs.max_hw_ird;
2287 cm_node->ord_size = cm_node->dev->hw_attrs.max_hw_ord;
2288
2289 cm_node->listener = listener;
2290 cm_node->cm_id = cm_info->cm_id;
2291 ether_addr_copy(cm_node->loc_mac, netdev->dev_addr);
2292 spin_lock_init(&cm_node->retrans_list_lock);
2293 cm_node->ack_rcvd = false;
2294
2295 init_completion(&cm_node->establish_comp);
2296 refcount_set(&cm_node->refcnt, 1);
2297 /* associate our parent CM core */
2298 cm_node->cm_core = cm_core;
2299 cm_node->tcp_cntxt.loc_id = IRDMA_CM_DEFAULT_LOCAL_ID;
2300 cm_node->tcp_cntxt.rcv_wscale = iwdev->rcv_wscale;
2301 cm_node->tcp_cntxt.rcv_wnd = iwdev->rcv_wnd >> cm_node->tcp_cntxt.rcv_wscale;
2302 if (cm_node->ipv4) {
2303 cm_node->tcp_cntxt.loc_seq_num = secure_tcp_seq(htonl(cm_node->loc_addr[0]),
2304 htonl(cm_node->rem_addr[0]),
2305 htons(cm_node->loc_port),
2306 htons(cm_node->rem_port));
2307 cm_node->tcp_cntxt.mss = iwdev->vsi.mtu - IRDMA_MTU_TO_MSS_IPV4;
2308 } else if (IS_ENABLED(CONFIG_IPV6)) {
2309 __be32 loc[4] = {
2310 htonl(cm_node->loc_addr[0]), htonl(cm_node->loc_addr[1]),
2311 htonl(cm_node->loc_addr[2]), htonl(cm_node->loc_addr[3])
2312 };
2313 __be32 rem[4] = {
2314 htonl(cm_node->rem_addr[0]), htonl(cm_node->rem_addr[1]),
2315 htonl(cm_node->rem_addr[2]), htonl(cm_node->rem_addr[3])
2316 };
2317 cm_node->tcp_cntxt.loc_seq_num = secure_tcpv6_seq(loc, rem,
2318 htons(cm_node->loc_port),
2319 htons(cm_node->rem_port));
2320 cm_node->tcp_cntxt.mss = iwdev->vsi.mtu - IRDMA_MTU_TO_MSS_IPV6;
2321 }
2322
2323 if ((cm_node->ipv4 &&
2324 irdma_ipv4_is_lpb(cm_node->loc_addr[0], cm_node->rem_addr[0])) ||
2325 (!cm_node->ipv4 &&
2326 irdma_ipv6_is_lpb(cm_node->loc_addr, cm_node->rem_addr))) {
2327 cm_node->do_lpb = true;
2328 arpindex = irdma_arp_table(iwdev->rf, cm_node->rem_addr,
2329 cm_node->ipv4, NULL,
2330 IRDMA_ARP_RESOLVE);
2331 } else {
2332 oldarpindex = irdma_arp_table(iwdev->rf, cm_node->rem_addr,
2333 cm_node->ipv4, NULL,
2334 IRDMA_ARP_RESOLVE);
2335 if (cm_node->ipv4)
2336 arpindex = irdma_addr_resolve_neigh(iwdev,
2337 cm_info->loc_addr[0],
2338 cm_info->rem_addr[0],
2339 oldarpindex);
2340 else if (IS_ENABLED(CONFIG_IPV6))
2341 arpindex = irdma_addr_resolve_neigh_ipv6(iwdev,
2342 cm_info->loc_addr,
2343 cm_info->rem_addr,
2344 oldarpindex);
2345 else
2346 arpindex = -EINVAL;
2347 }
2348
2349 if (arpindex < 0)
2350 goto err;
2351
2352 ether_addr_copy(cm_node->rem_mac,
2353 iwdev->rf->arp_table[arpindex].mac_addr);
2354 irdma_add_hte_node(cm_core, cm_node);
2355 cm_core->stats_nodes_created++;
2356 return cm_node;
2357
2358 err:
2359 kfree(cm_node);
2360
2361 return NULL;
2362 }
2363
irdma_destroy_connection(struct irdma_cm_node * cm_node)2364 static void irdma_destroy_connection(struct irdma_cm_node *cm_node)
2365 {
2366 struct irdma_cm_core *cm_core = cm_node->cm_core;
2367 struct irdma_qp *iwqp;
2368 struct irdma_cm_info nfo;
2369
2370 /* if the node is destroyed before connection was accelerated */
2371 if (!cm_node->accelerated && cm_node->accept_pend) {
2372 ibdev_dbg(&cm_node->iwdev->ibdev,
2373 "CM: node destroyed before established\n");
2374 atomic_dec(&cm_node->listener->pend_accepts_cnt);
2375 }
2376 if (cm_node->close_entry)
2377 irdma_handle_close_entry(cm_node, 0);
2378 if (cm_node->listener) {
2379 irdma_dec_refcnt_listen(cm_core, cm_node->listener, 0, true);
2380 } else {
2381 if (cm_node->apbvt_set) {
2382 irdma_del_apbvt(cm_node->iwdev, cm_node->apbvt_entry);
2383 cm_node->apbvt_set = 0;
2384 }
2385 irdma_get_addr_info(cm_node, &nfo);
2386 if (cm_node->qhash_set) {
2387 nfo.qh_qpid = cm_node->iwdev->vsi.ilq->qp_id;
2388 irdma_manage_qhash(cm_node->iwdev, &nfo,
2389 IRDMA_QHASH_TYPE_TCP_ESTABLISHED,
2390 IRDMA_QHASH_MANAGE_TYPE_DELETE, NULL,
2391 false);
2392 cm_node->qhash_set = 0;
2393 }
2394 }
2395
2396 iwqp = cm_node->iwqp;
2397 if (iwqp) {
2398 cm_node->cm_id->rem_ref(cm_node->cm_id);
2399 cm_node->cm_id = NULL;
2400 iwqp->cm_id = NULL;
2401 irdma_qp_rem_ref(&iwqp->ibqp);
2402 cm_node->iwqp = NULL;
2403 } else if (cm_node->qhash_set) {
2404 irdma_get_addr_info(cm_node, &nfo);
2405 nfo.qh_qpid = cm_node->iwdev->vsi.ilq->qp_id;
2406 irdma_manage_qhash(cm_node->iwdev, &nfo,
2407 IRDMA_QHASH_TYPE_TCP_ESTABLISHED,
2408 IRDMA_QHASH_MANAGE_TYPE_DELETE, NULL, false);
2409 cm_node->qhash_set = 0;
2410 }
2411
2412 cm_core->cm_free_ah(cm_node);
2413 }
2414
2415 /**
2416 * irdma_rem_ref_cm_node - destroy an instance of a cm node
2417 * @cm_node: connection's node
2418 */
irdma_rem_ref_cm_node(struct irdma_cm_node * cm_node)2419 void irdma_rem_ref_cm_node(struct irdma_cm_node *cm_node)
2420 {
2421 struct irdma_cm_core *cm_core = cm_node->cm_core;
2422 unsigned long flags;
2423
2424 trace_irdma_rem_ref_cm_node(cm_node, 0, __builtin_return_address(0));
2425 spin_lock_irqsave(&cm_core->ht_lock, flags);
2426
2427 if (!refcount_dec_and_test(&cm_node->refcnt)) {
2428 spin_unlock_irqrestore(&cm_core->ht_lock, flags);
2429 return;
2430 }
2431 if (cm_node->iwqp) {
2432 cm_node->iwqp->cm_node = NULL;
2433 cm_node->iwqp->cm_id = NULL;
2434 }
2435 hash_del_rcu(&cm_node->list);
2436 cm_node->cm_core->stats_nodes_destroyed++;
2437
2438 spin_unlock_irqrestore(&cm_core->ht_lock, flags);
2439
2440 irdma_destroy_connection(cm_node);
2441
2442 kfree_rcu(cm_node, rcu_head);
2443 }
2444
2445 /**
2446 * irdma_handle_fin_pkt - FIN packet received
2447 * @cm_node: connection's node
2448 */
irdma_handle_fin_pkt(struct irdma_cm_node * cm_node)2449 static void irdma_handle_fin_pkt(struct irdma_cm_node *cm_node)
2450 {
2451 switch (cm_node->state) {
2452 case IRDMA_CM_STATE_SYN_RCVD:
2453 case IRDMA_CM_STATE_SYN_SENT:
2454 case IRDMA_CM_STATE_ESTABLISHED:
2455 case IRDMA_CM_STATE_MPAREJ_RCVD:
2456 cm_node->tcp_cntxt.rcv_nxt++;
2457 irdma_cleanup_retrans_entry(cm_node);
2458 cm_node->state = IRDMA_CM_STATE_LAST_ACK;
2459 irdma_send_fin(cm_node);
2460 break;
2461 case IRDMA_CM_STATE_MPAREQ_SENT:
2462 irdma_create_event(cm_node, IRDMA_CM_EVENT_ABORTED);
2463 cm_node->tcp_cntxt.rcv_nxt++;
2464 irdma_cleanup_retrans_entry(cm_node);
2465 cm_node->state = IRDMA_CM_STATE_CLOSED;
2466 refcount_inc(&cm_node->refcnt);
2467 irdma_send_reset(cm_node);
2468 break;
2469 case IRDMA_CM_STATE_FIN_WAIT1:
2470 cm_node->tcp_cntxt.rcv_nxt++;
2471 irdma_cleanup_retrans_entry(cm_node);
2472 cm_node->state = IRDMA_CM_STATE_CLOSING;
2473 irdma_send_ack(cm_node);
2474 /*
2475 * Wait for ACK as this is simultaneous close.
2476 * After we receive ACK, do not send anything.
2477 * Just rm the node.
2478 */
2479 break;
2480 case IRDMA_CM_STATE_FIN_WAIT2:
2481 cm_node->tcp_cntxt.rcv_nxt++;
2482 irdma_cleanup_retrans_entry(cm_node);
2483 cm_node->state = IRDMA_CM_STATE_TIME_WAIT;
2484 irdma_send_ack(cm_node);
2485 irdma_schedule_cm_timer(cm_node, NULL, IRDMA_TIMER_TYPE_CLOSE,
2486 1, 0);
2487 break;
2488 case IRDMA_CM_STATE_TIME_WAIT:
2489 cm_node->tcp_cntxt.rcv_nxt++;
2490 irdma_cleanup_retrans_entry(cm_node);
2491 cm_node->state = IRDMA_CM_STATE_CLOSED;
2492 irdma_rem_ref_cm_node(cm_node);
2493 break;
2494 case IRDMA_CM_STATE_OFFLOADED:
2495 default:
2496 ibdev_dbg(&cm_node->iwdev->ibdev,
2497 "CM: bad state node state = %d\n", cm_node->state);
2498 break;
2499 }
2500 }
2501
2502 /**
2503 * irdma_handle_rst_pkt - process received RST packet
2504 * @cm_node: connection's node
2505 * @rbuf: receive buffer
2506 */
irdma_handle_rst_pkt(struct irdma_cm_node * cm_node,struct irdma_puda_buf * rbuf)2507 static void irdma_handle_rst_pkt(struct irdma_cm_node *cm_node,
2508 struct irdma_puda_buf *rbuf)
2509 {
2510 ibdev_dbg(&cm_node->iwdev->ibdev,
2511 "CM: caller: %pS cm_node=%p state=%d rem_port=0x%04x loc_port=0x%04x rem_addr=%pI4 loc_addr=%pI4\n",
2512 __builtin_return_address(0), cm_node, cm_node->state,
2513 cm_node->rem_port, cm_node->loc_port, cm_node->rem_addr,
2514 cm_node->loc_addr);
2515
2516 irdma_cleanup_retrans_entry(cm_node);
2517 switch (cm_node->state) {
2518 case IRDMA_CM_STATE_SYN_SENT:
2519 case IRDMA_CM_STATE_MPAREQ_SENT:
2520 switch (cm_node->mpa_frame_rev) {
2521 case IETF_MPA_V2:
2522 /* Drop down to MPA_V1*/
2523 cm_node->mpa_frame_rev = IETF_MPA_V1;
2524 /* send a syn and goto syn sent state */
2525 cm_node->state = IRDMA_CM_STATE_SYN_SENT;
2526 if (irdma_send_syn(cm_node, 0))
2527 irdma_active_open_err(cm_node, false);
2528 break;
2529 case IETF_MPA_V1:
2530 default:
2531 irdma_active_open_err(cm_node, false);
2532 break;
2533 }
2534 break;
2535 case IRDMA_CM_STATE_MPAREQ_RCVD:
2536 atomic_inc(&cm_node->passive_state);
2537 break;
2538 case IRDMA_CM_STATE_ESTABLISHED:
2539 case IRDMA_CM_STATE_SYN_RCVD:
2540 case IRDMA_CM_STATE_LISTENING:
2541 irdma_passive_open_err(cm_node, false);
2542 break;
2543 case IRDMA_CM_STATE_OFFLOADED:
2544 irdma_active_open_err(cm_node, false);
2545 break;
2546 case IRDMA_CM_STATE_CLOSED:
2547 break;
2548 case IRDMA_CM_STATE_FIN_WAIT2:
2549 case IRDMA_CM_STATE_FIN_WAIT1:
2550 case IRDMA_CM_STATE_LAST_ACK:
2551 case IRDMA_CM_STATE_TIME_WAIT:
2552 cm_node->state = IRDMA_CM_STATE_CLOSED;
2553 irdma_rem_ref_cm_node(cm_node);
2554 break;
2555 default:
2556 break;
2557 }
2558 }
2559
2560 /**
2561 * irdma_handle_rcv_mpa - Process a recv'd mpa buffer
2562 * @cm_node: connection's node
2563 * @rbuf: receive buffer
2564 */
irdma_handle_rcv_mpa(struct irdma_cm_node * cm_node,struct irdma_puda_buf * rbuf)2565 static void irdma_handle_rcv_mpa(struct irdma_cm_node *cm_node,
2566 struct irdma_puda_buf *rbuf)
2567 {
2568 int err;
2569 int datasize = rbuf->datalen;
2570 u8 *dataloc = rbuf->data;
2571
2572 enum irdma_cm_event_type type = IRDMA_CM_EVENT_UNKNOWN;
2573 u32 res_type;
2574
2575 err = irdma_parse_mpa(cm_node, dataloc, &res_type, datasize);
2576 if (err) {
2577 if (cm_node->state == IRDMA_CM_STATE_MPAREQ_SENT)
2578 irdma_active_open_err(cm_node, true);
2579 else
2580 irdma_passive_open_err(cm_node, true);
2581 return;
2582 }
2583
2584 switch (cm_node->state) {
2585 case IRDMA_CM_STATE_ESTABLISHED:
2586 if (res_type == IRDMA_MPA_REQUEST_REJECT)
2587 ibdev_dbg(&cm_node->iwdev->ibdev,
2588 "CM: state for reject\n");
2589 cm_node->state = IRDMA_CM_STATE_MPAREQ_RCVD;
2590 type = IRDMA_CM_EVENT_MPA_REQ;
2591 irdma_send_ack(cm_node); /* ACK received MPA request */
2592 atomic_set(&cm_node->passive_state,
2593 IRDMA_PASSIVE_STATE_INDICATED);
2594 break;
2595 case IRDMA_CM_STATE_MPAREQ_SENT:
2596 irdma_cleanup_retrans_entry(cm_node);
2597 if (res_type == IRDMA_MPA_REQUEST_REJECT) {
2598 type = IRDMA_CM_EVENT_MPA_REJECT;
2599 cm_node->state = IRDMA_CM_STATE_MPAREJ_RCVD;
2600 } else {
2601 type = IRDMA_CM_EVENT_CONNECTED;
2602 cm_node->state = IRDMA_CM_STATE_OFFLOADED;
2603 }
2604 irdma_send_ack(cm_node);
2605 break;
2606 default:
2607 ibdev_dbg(&cm_node->iwdev->ibdev,
2608 "CM: wrong cm_node state =%d\n", cm_node->state);
2609 break;
2610 }
2611 irdma_create_event(cm_node, type);
2612 }
2613
2614 /**
2615 * irdma_check_syn - Check for error on received syn ack
2616 * @cm_node: connection's node
2617 * @tcph: pointer tcp header
2618 */
irdma_check_syn(struct irdma_cm_node * cm_node,struct tcphdr * tcph)2619 static int irdma_check_syn(struct irdma_cm_node *cm_node, struct tcphdr *tcph)
2620 {
2621 if (ntohl(tcph->ack_seq) != cm_node->tcp_cntxt.loc_seq_num) {
2622 irdma_active_open_err(cm_node, true);
2623 return 1;
2624 }
2625
2626 return 0;
2627 }
2628
2629 /**
2630 * irdma_check_seq - check seq numbers if OK
2631 * @cm_node: connection's node
2632 * @tcph: pointer tcp header
2633 */
irdma_check_seq(struct irdma_cm_node * cm_node,struct tcphdr * tcph)2634 static int irdma_check_seq(struct irdma_cm_node *cm_node, struct tcphdr *tcph)
2635 {
2636 u32 seq;
2637 u32 ack_seq;
2638 u32 loc_seq_num = cm_node->tcp_cntxt.loc_seq_num;
2639 u32 rcv_nxt = cm_node->tcp_cntxt.rcv_nxt;
2640 u32 rcv_wnd;
2641 int err = 0;
2642
2643 seq = ntohl(tcph->seq);
2644 ack_seq = ntohl(tcph->ack_seq);
2645 rcv_wnd = cm_node->tcp_cntxt.rcv_wnd;
2646 if (ack_seq != loc_seq_num ||
2647 !between(seq, rcv_nxt, (rcv_nxt + rcv_wnd)))
2648 err = -1;
2649 if (err)
2650 ibdev_dbg(&cm_node->iwdev->ibdev,
2651 "CM: seq number err\n");
2652
2653 return err;
2654 }
2655
irdma_add_conn_est_qh(struct irdma_cm_node * cm_node)2656 void irdma_add_conn_est_qh(struct irdma_cm_node *cm_node)
2657 {
2658 struct irdma_cm_info nfo;
2659
2660 irdma_get_addr_info(cm_node, &nfo);
2661 nfo.qh_qpid = cm_node->iwdev->vsi.ilq->qp_id;
2662 irdma_manage_qhash(cm_node->iwdev, &nfo,
2663 IRDMA_QHASH_TYPE_TCP_ESTABLISHED,
2664 IRDMA_QHASH_MANAGE_TYPE_ADD,
2665 cm_node, false);
2666 cm_node->qhash_set = true;
2667 }
2668
2669 /**
2670 * irdma_handle_syn_pkt - is for Passive node
2671 * @cm_node: connection's node
2672 * @rbuf: receive buffer
2673 */
irdma_handle_syn_pkt(struct irdma_cm_node * cm_node,struct irdma_puda_buf * rbuf)2674 static void irdma_handle_syn_pkt(struct irdma_cm_node *cm_node,
2675 struct irdma_puda_buf *rbuf)
2676 {
2677 struct tcphdr *tcph = (struct tcphdr *)rbuf->tcph;
2678 int err;
2679 u32 inc_sequence;
2680 int optionsize;
2681
2682 optionsize = (tcph->doff << 2) - sizeof(struct tcphdr);
2683 inc_sequence = ntohl(tcph->seq);
2684
2685 switch (cm_node->state) {
2686 case IRDMA_CM_STATE_SYN_SENT:
2687 case IRDMA_CM_STATE_MPAREQ_SENT:
2688 /* Rcvd syn on active open connection */
2689 irdma_active_open_err(cm_node, 1);
2690 break;
2691 case IRDMA_CM_STATE_LISTENING:
2692 /* Passive OPEN */
2693 if (atomic_read(&cm_node->listener->pend_accepts_cnt) >
2694 cm_node->listener->backlog) {
2695 cm_node->cm_core->stats_backlog_drops++;
2696 irdma_passive_open_err(cm_node, false);
2697 break;
2698 }
2699 err = irdma_handle_tcp_options(cm_node, tcph, optionsize, 1);
2700 if (err) {
2701 irdma_passive_open_err(cm_node, false);
2702 /* drop pkt */
2703 break;
2704 }
2705 err = cm_node->cm_core->cm_create_ah(cm_node, false);
2706 if (err) {
2707 irdma_passive_open_err(cm_node, false);
2708 /* drop pkt */
2709 break;
2710 }
2711 cm_node->tcp_cntxt.rcv_nxt = inc_sequence + 1;
2712 cm_node->accept_pend = 1;
2713 atomic_inc(&cm_node->listener->pend_accepts_cnt);
2714
2715 cm_node->state = IRDMA_CM_STATE_SYN_RCVD;
2716 break;
2717 case IRDMA_CM_STATE_CLOSED:
2718 irdma_cleanup_retrans_entry(cm_node);
2719 refcount_inc(&cm_node->refcnt);
2720 irdma_send_reset(cm_node);
2721 break;
2722 case IRDMA_CM_STATE_OFFLOADED:
2723 case IRDMA_CM_STATE_ESTABLISHED:
2724 case IRDMA_CM_STATE_FIN_WAIT1:
2725 case IRDMA_CM_STATE_FIN_WAIT2:
2726 case IRDMA_CM_STATE_MPAREQ_RCVD:
2727 case IRDMA_CM_STATE_LAST_ACK:
2728 case IRDMA_CM_STATE_CLOSING:
2729 case IRDMA_CM_STATE_UNKNOWN:
2730 default:
2731 break;
2732 }
2733 }
2734
2735 /**
2736 * irdma_handle_synack_pkt - Process SYN+ACK packet (active side)
2737 * @cm_node: connection's node
2738 * @rbuf: receive buffer
2739 */
irdma_handle_synack_pkt(struct irdma_cm_node * cm_node,struct irdma_puda_buf * rbuf)2740 static void irdma_handle_synack_pkt(struct irdma_cm_node *cm_node,
2741 struct irdma_puda_buf *rbuf)
2742 {
2743 struct tcphdr *tcph = (struct tcphdr *)rbuf->tcph;
2744 int err;
2745 u32 inc_sequence;
2746 int optionsize;
2747
2748 optionsize = (tcph->doff << 2) - sizeof(struct tcphdr);
2749 inc_sequence = ntohl(tcph->seq);
2750 switch (cm_node->state) {
2751 case IRDMA_CM_STATE_SYN_SENT:
2752 irdma_cleanup_retrans_entry(cm_node);
2753 /* active open */
2754 if (irdma_check_syn(cm_node, tcph)) {
2755 ibdev_dbg(&cm_node->iwdev->ibdev,
2756 "CM: check syn fail\n");
2757 return;
2758 }
2759 cm_node->tcp_cntxt.rem_ack_num = ntohl(tcph->ack_seq);
2760 /* setup options */
2761 err = irdma_handle_tcp_options(cm_node, tcph, optionsize, 0);
2762 if (err) {
2763 ibdev_dbg(&cm_node->iwdev->ibdev,
2764 "CM: cm_node=%p tcp_options failed\n",
2765 cm_node);
2766 break;
2767 }
2768 irdma_cleanup_retrans_entry(cm_node);
2769 cm_node->tcp_cntxt.rcv_nxt = inc_sequence + 1;
2770 irdma_send_ack(cm_node); /* ACK for the syn_ack */
2771 err = irdma_send_mpa_request(cm_node);
2772 if (err) {
2773 ibdev_dbg(&cm_node->iwdev->ibdev,
2774 "CM: cm_node=%p irdma_send_mpa_request failed\n",
2775 cm_node);
2776 break;
2777 }
2778 cm_node->state = IRDMA_CM_STATE_MPAREQ_SENT;
2779 break;
2780 case IRDMA_CM_STATE_MPAREQ_RCVD:
2781 irdma_passive_open_err(cm_node, true);
2782 break;
2783 case IRDMA_CM_STATE_LISTENING:
2784 cm_node->tcp_cntxt.loc_seq_num = ntohl(tcph->ack_seq);
2785 irdma_cleanup_retrans_entry(cm_node);
2786 cm_node->state = IRDMA_CM_STATE_CLOSED;
2787 irdma_send_reset(cm_node);
2788 break;
2789 case IRDMA_CM_STATE_CLOSED:
2790 cm_node->tcp_cntxt.loc_seq_num = ntohl(tcph->ack_seq);
2791 irdma_cleanup_retrans_entry(cm_node);
2792 refcount_inc(&cm_node->refcnt);
2793 irdma_send_reset(cm_node);
2794 break;
2795 case IRDMA_CM_STATE_ESTABLISHED:
2796 case IRDMA_CM_STATE_FIN_WAIT1:
2797 case IRDMA_CM_STATE_FIN_WAIT2:
2798 case IRDMA_CM_STATE_LAST_ACK:
2799 case IRDMA_CM_STATE_OFFLOADED:
2800 case IRDMA_CM_STATE_CLOSING:
2801 case IRDMA_CM_STATE_UNKNOWN:
2802 case IRDMA_CM_STATE_MPAREQ_SENT:
2803 default:
2804 break;
2805 }
2806 }
2807
2808 /**
2809 * irdma_handle_ack_pkt - process packet with ACK
2810 * @cm_node: connection's node
2811 * @rbuf: receive buffer
2812 */
irdma_handle_ack_pkt(struct irdma_cm_node * cm_node,struct irdma_puda_buf * rbuf)2813 static int irdma_handle_ack_pkt(struct irdma_cm_node *cm_node,
2814 struct irdma_puda_buf *rbuf)
2815 {
2816 struct tcphdr *tcph = (struct tcphdr *)rbuf->tcph;
2817 u32 inc_sequence;
2818 int ret;
2819 int optionsize;
2820 u32 datasize = rbuf->datalen;
2821
2822 optionsize = (tcph->doff << 2) - sizeof(struct tcphdr);
2823
2824 if (irdma_check_seq(cm_node, tcph))
2825 return -EINVAL;
2826
2827 inc_sequence = ntohl(tcph->seq);
2828 switch (cm_node->state) {
2829 case IRDMA_CM_STATE_SYN_RCVD:
2830 irdma_cleanup_retrans_entry(cm_node);
2831 ret = irdma_handle_tcp_options(cm_node, tcph, optionsize, 1);
2832 if (ret)
2833 return ret;
2834 cm_node->tcp_cntxt.rem_ack_num = ntohl(tcph->ack_seq);
2835 cm_node->state = IRDMA_CM_STATE_ESTABLISHED;
2836 if (datasize) {
2837 cm_node->tcp_cntxt.rcv_nxt = inc_sequence + datasize;
2838 irdma_handle_rcv_mpa(cm_node, rbuf);
2839 }
2840 break;
2841 case IRDMA_CM_STATE_ESTABLISHED:
2842 irdma_cleanup_retrans_entry(cm_node);
2843 if (datasize) {
2844 cm_node->tcp_cntxt.rcv_nxt = inc_sequence + datasize;
2845 irdma_handle_rcv_mpa(cm_node, rbuf);
2846 }
2847 break;
2848 case IRDMA_CM_STATE_MPAREQ_SENT:
2849 cm_node->tcp_cntxt.rem_ack_num = ntohl(tcph->ack_seq);
2850 if (datasize) {
2851 cm_node->tcp_cntxt.rcv_nxt = inc_sequence + datasize;
2852 cm_node->ack_rcvd = false;
2853 irdma_handle_rcv_mpa(cm_node, rbuf);
2854 } else {
2855 cm_node->ack_rcvd = true;
2856 }
2857 break;
2858 case IRDMA_CM_STATE_LISTENING:
2859 irdma_cleanup_retrans_entry(cm_node);
2860 cm_node->state = IRDMA_CM_STATE_CLOSED;
2861 irdma_send_reset(cm_node);
2862 break;
2863 case IRDMA_CM_STATE_CLOSED:
2864 irdma_cleanup_retrans_entry(cm_node);
2865 refcount_inc(&cm_node->refcnt);
2866 irdma_send_reset(cm_node);
2867 break;
2868 case IRDMA_CM_STATE_LAST_ACK:
2869 case IRDMA_CM_STATE_CLOSING:
2870 irdma_cleanup_retrans_entry(cm_node);
2871 cm_node->state = IRDMA_CM_STATE_CLOSED;
2872 irdma_rem_ref_cm_node(cm_node);
2873 break;
2874 case IRDMA_CM_STATE_FIN_WAIT1:
2875 irdma_cleanup_retrans_entry(cm_node);
2876 cm_node->state = IRDMA_CM_STATE_FIN_WAIT2;
2877 break;
2878 case IRDMA_CM_STATE_SYN_SENT:
2879 case IRDMA_CM_STATE_FIN_WAIT2:
2880 case IRDMA_CM_STATE_OFFLOADED:
2881 case IRDMA_CM_STATE_MPAREQ_RCVD:
2882 case IRDMA_CM_STATE_UNKNOWN:
2883 default:
2884 irdma_cleanup_retrans_entry(cm_node);
2885 break;
2886 }
2887
2888 return 0;
2889 }
2890
2891 /**
2892 * irdma_process_pkt - process cm packet
2893 * @cm_node: connection's node
2894 * @rbuf: receive buffer
2895 */
irdma_process_pkt(struct irdma_cm_node * cm_node,struct irdma_puda_buf * rbuf)2896 static void irdma_process_pkt(struct irdma_cm_node *cm_node,
2897 struct irdma_puda_buf *rbuf)
2898 {
2899 enum irdma_tcpip_pkt_type pkt_type = IRDMA_PKT_TYPE_UNKNOWN;
2900 struct tcphdr *tcph = (struct tcphdr *)rbuf->tcph;
2901 u32 fin_set = 0;
2902 int err;
2903
2904 if (tcph->rst) {
2905 pkt_type = IRDMA_PKT_TYPE_RST;
2906 } else if (tcph->syn) {
2907 pkt_type = IRDMA_PKT_TYPE_SYN;
2908 if (tcph->ack)
2909 pkt_type = IRDMA_PKT_TYPE_SYNACK;
2910 } else if (tcph->ack) {
2911 pkt_type = IRDMA_PKT_TYPE_ACK;
2912 }
2913 if (tcph->fin)
2914 fin_set = 1;
2915
2916 switch (pkt_type) {
2917 case IRDMA_PKT_TYPE_SYN:
2918 irdma_handle_syn_pkt(cm_node, rbuf);
2919 break;
2920 case IRDMA_PKT_TYPE_SYNACK:
2921 irdma_handle_synack_pkt(cm_node, rbuf);
2922 break;
2923 case IRDMA_PKT_TYPE_ACK:
2924 err = irdma_handle_ack_pkt(cm_node, rbuf);
2925 if (fin_set && !err)
2926 irdma_handle_fin_pkt(cm_node);
2927 break;
2928 case IRDMA_PKT_TYPE_RST:
2929 irdma_handle_rst_pkt(cm_node, rbuf);
2930 break;
2931 default:
2932 if (fin_set &&
2933 (!irdma_check_seq(cm_node, (struct tcphdr *)rbuf->tcph)))
2934 irdma_handle_fin_pkt(cm_node);
2935 break;
2936 }
2937 }
2938
2939 /**
2940 * irdma_make_listen_node - create a listen node with params
2941 * @cm_core: cm's core
2942 * @iwdev: iwarp device structure
2943 * @cm_info: quad info for connection
2944 */
2945 static struct irdma_cm_listener *
irdma_make_listen_node(struct irdma_cm_core * cm_core,struct irdma_device * iwdev,struct irdma_cm_info * cm_info)2946 irdma_make_listen_node(struct irdma_cm_core *cm_core,
2947 struct irdma_device *iwdev,
2948 struct irdma_cm_info *cm_info)
2949 {
2950 struct irdma_cm_listener *listener;
2951 unsigned long flags;
2952
2953 /* cannot have multiple matching listeners */
2954 listener =
2955 irdma_find_listener(cm_core, cm_info->loc_addr, cm_info->ipv4,
2956 cm_info->loc_port, cm_info->vlan_id,
2957 IRDMA_CM_LISTENER_EITHER_STATE);
2958 if (listener &&
2959 listener->listener_state == IRDMA_CM_LISTENER_ACTIVE_STATE) {
2960 refcount_dec(&listener->refcnt);
2961 return NULL;
2962 }
2963
2964 if (!listener) {
2965 /* create a CM listen node
2966 * 1/2 node to compare incoming traffic to
2967 */
2968 listener = kzalloc(sizeof(*listener), GFP_KERNEL);
2969 if (!listener)
2970 return NULL;
2971 cm_core->stats_listen_nodes_created++;
2972 memcpy(listener->loc_addr, cm_info->loc_addr,
2973 sizeof(listener->loc_addr));
2974 listener->loc_port = cm_info->loc_port;
2975
2976 INIT_LIST_HEAD(&listener->child_listen_list);
2977
2978 refcount_set(&listener->refcnt, 1);
2979 } else {
2980 listener->reused_node = 1;
2981 }
2982
2983 listener->cm_id = cm_info->cm_id;
2984 listener->ipv4 = cm_info->ipv4;
2985 listener->vlan_id = cm_info->vlan_id;
2986 atomic_set(&listener->pend_accepts_cnt, 0);
2987 listener->cm_core = cm_core;
2988 listener->iwdev = iwdev;
2989
2990 listener->backlog = cm_info->backlog;
2991 listener->listener_state = IRDMA_CM_LISTENER_ACTIVE_STATE;
2992
2993 if (!listener->reused_node) {
2994 spin_lock_irqsave(&cm_core->listen_list_lock, flags);
2995 list_add(&listener->list, &cm_core->listen_list);
2996 spin_unlock_irqrestore(&cm_core->listen_list_lock, flags);
2997 }
2998
2999 return listener;
3000 }
3001
3002 /**
3003 * irdma_create_cm_node - make a connection node with params
3004 * @cm_core: cm's core
3005 * @iwdev: iwarp device structure
3006 * @conn_param: connection parameters
3007 * @cm_info: quad info for connection
3008 * @caller_cm_node: pointer to cm_node structure to return
3009 */
irdma_create_cm_node(struct irdma_cm_core * cm_core,struct irdma_device * iwdev,struct iw_cm_conn_param * conn_param,struct irdma_cm_info * cm_info,struct irdma_cm_node ** caller_cm_node)3010 static int irdma_create_cm_node(struct irdma_cm_core *cm_core,
3011 struct irdma_device *iwdev,
3012 struct iw_cm_conn_param *conn_param,
3013 struct irdma_cm_info *cm_info,
3014 struct irdma_cm_node **caller_cm_node)
3015 {
3016 struct irdma_cm_node *cm_node;
3017 u16 private_data_len = conn_param->private_data_len;
3018 const void *private_data = conn_param->private_data;
3019
3020 /* create a CM connection node */
3021 cm_node = irdma_make_cm_node(cm_core, iwdev, cm_info, NULL);
3022 if (!cm_node)
3023 return -ENOMEM;
3024
3025 /* set our node side to client (active) side */
3026 cm_node->tcp_cntxt.client = 1;
3027 cm_node->tcp_cntxt.rcv_wscale = IRDMA_CM_DEFAULT_RCV_WND_SCALE;
3028
3029 irdma_record_ird_ord(cm_node, conn_param->ird, conn_param->ord);
3030
3031 cm_node->pdata.size = private_data_len;
3032 cm_node->pdata.addr = cm_node->pdata_buf;
3033
3034 memcpy(cm_node->pdata_buf, private_data, private_data_len);
3035 *caller_cm_node = cm_node;
3036
3037 return 0;
3038 }
3039
3040 /**
3041 * irdma_cm_reject - reject and teardown a connection
3042 * @cm_node: connection's node
3043 * @pdata: ptr to private data for reject
3044 * @plen: size of private data
3045 */
irdma_cm_reject(struct irdma_cm_node * cm_node,const void * pdata,u8 plen)3046 static int irdma_cm_reject(struct irdma_cm_node *cm_node, const void *pdata,
3047 u8 plen)
3048 {
3049 int ret;
3050 int passive_state;
3051
3052 if (cm_node->tcp_cntxt.client)
3053 return 0;
3054
3055 irdma_cleanup_retrans_entry(cm_node);
3056
3057 passive_state = atomic_add_return(1, &cm_node->passive_state);
3058 if (passive_state == IRDMA_SEND_RESET_EVENT) {
3059 cm_node->state = IRDMA_CM_STATE_CLOSED;
3060 irdma_rem_ref_cm_node(cm_node);
3061 return 0;
3062 }
3063
3064 if (cm_node->state == IRDMA_CM_STATE_LISTENER_DESTROYED) {
3065 irdma_rem_ref_cm_node(cm_node);
3066 return 0;
3067 }
3068
3069 ret = irdma_send_mpa_reject(cm_node, pdata, plen);
3070 if (!ret)
3071 return 0;
3072
3073 cm_node->state = IRDMA_CM_STATE_CLOSED;
3074 if (irdma_send_reset(cm_node))
3075 ibdev_dbg(&cm_node->iwdev->ibdev,
3076 "CM: send reset failed\n");
3077
3078 return ret;
3079 }
3080
3081 /**
3082 * irdma_cm_close - close of cm connection
3083 * @cm_node: connection's node
3084 */
irdma_cm_close(struct irdma_cm_node * cm_node)3085 static int irdma_cm_close(struct irdma_cm_node *cm_node)
3086 {
3087 switch (cm_node->state) {
3088 case IRDMA_CM_STATE_SYN_RCVD:
3089 case IRDMA_CM_STATE_SYN_SENT:
3090 case IRDMA_CM_STATE_ONE_SIDE_ESTABLISHED:
3091 case IRDMA_CM_STATE_ESTABLISHED:
3092 case IRDMA_CM_STATE_ACCEPTING:
3093 case IRDMA_CM_STATE_MPAREQ_SENT:
3094 case IRDMA_CM_STATE_MPAREQ_RCVD:
3095 irdma_cleanup_retrans_entry(cm_node);
3096 irdma_send_reset(cm_node);
3097 break;
3098 case IRDMA_CM_STATE_CLOSE_WAIT:
3099 cm_node->state = IRDMA_CM_STATE_LAST_ACK;
3100 irdma_send_fin(cm_node);
3101 break;
3102 case IRDMA_CM_STATE_FIN_WAIT1:
3103 case IRDMA_CM_STATE_FIN_WAIT2:
3104 case IRDMA_CM_STATE_LAST_ACK:
3105 case IRDMA_CM_STATE_TIME_WAIT:
3106 case IRDMA_CM_STATE_CLOSING:
3107 return -EINVAL;
3108 case IRDMA_CM_STATE_LISTENING:
3109 irdma_cleanup_retrans_entry(cm_node);
3110 irdma_send_reset(cm_node);
3111 break;
3112 case IRDMA_CM_STATE_MPAREJ_RCVD:
3113 case IRDMA_CM_STATE_UNKNOWN:
3114 case IRDMA_CM_STATE_INITED:
3115 case IRDMA_CM_STATE_CLOSED:
3116 case IRDMA_CM_STATE_LISTENER_DESTROYED:
3117 irdma_rem_ref_cm_node(cm_node);
3118 break;
3119 case IRDMA_CM_STATE_OFFLOADED:
3120 if (cm_node->send_entry)
3121 ibdev_dbg(&cm_node->iwdev->ibdev,
3122 "CM: CM send_entry in OFFLOADED state\n");
3123 irdma_rem_ref_cm_node(cm_node);
3124 break;
3125 }
3126
3127 return 0;
3128 }
3129
3130 /**
3131 * irdma_receive_ilq - recv an ETHERNET packet, and process it
3132 * through CM
3133 * @vsi: VSI structure of dev
3134 * @rbuf: receive buffer
3135 */
irdma_receive_ilq(struct irdma_sc_vsi * vsi,struct irdma_puda_buf * rbuf)3136 void irdma_receive_ilq(struct irdma_sc_vsi *vsi, struct irdma_puda_buf *rbuf)
3137 {
3138 struct irdma_cm_node *cm_node;
3139 struct irdma_cm_listener *listener;
3140 struct iphdr *iph;
3141 struct ipv6hdr *ip6h;
3142 struct tcphdr *tcph;
3143 struct irdma_cm_info cm_info = {};
3144 struct irdma_device *iwdev = vsi->back_vsi;
3145 struct irdma_cm_core *cm_core = &iwdev->cm_core;
3146 struct vlan_ethhdr *ethh;
3147 u16 vtag;
3148
3149 /* if vlan, then maclen = 18 else 14 */
3150 iph = (struct iphdr *)rbuf->iph;
3151 print_hex_dump_debug("ILQ: RECEIVE ILQ BUFFER", DUMP_PREFIX_OFFSET,
3152 16, 8, rbuf->mem.va, rbuf->totallen, false);
3153 if (iwdev->rf->sc_dev.hw_attrs.uk_attrs.hw_rev >= IRDMA_GEN_2) {
3154 if (rbuf->vlan_valid) {
3155 vtag = rbuf->vlan_id;
3156 cm_info.user_pri = (vtag & VLAN_PRIO_MASK) >>
3157 VLAN_PRIO_SHIFT;
3158 cm_info.vlan_id = vtag & VLAN_VID_MASK;
3159 } else {
3160 cm_info.vlan_id = 0xFFFF;
3161 }
3162 } else {
3163 ethh = rbuf->mem.va;
3164
3165 if (ethh->h_vlan_proto == htons(ETH_P_8021Q)) {
3166 vtag = ntohs(ethh->h_vlan_TCI);
3167 cm_info.user_pri = (vtag & VLAN_PRIO_MASK) >>
3168 VLAN_PRIO_SHIFT;
3169 cm_info.vlan_id = vtag & VLAN_VID_MASK;
3170 ibdev_dbg(&cm_core->iwdev->ibdev,
3171 "CM: vlan_id=%d\n", cm_info.vlan_id);
3172 } else {
3173 cm_info.vlan_id = 0xFFFF;
3174 }
3175 }
3176 tcph = (struct tcphdr *)rbuf->tcph;
3177
3178 if (rbuf->ipv4) {
3179 cm_info.loc_addr[0] = ntohl(iph->daddr);
3180 cm_info.rem_addr[0] = ntohl(iph->saddr);
3181 cm_info.ipv4 = true;
3182 cm_info.tos = iph->tos;
3183 } else {
3184 ip6h = (struct ipv6hdr *)rbuf->iph;
3185 irdma_copy_ip_ntohl(cm_info.loc_addr,
3186 ip6h->daddr.in6_u.u6_addr32);
3187 irdma_copy_ip_ntohl(cm_info.rem_addr,
3188 ip6h->saddr.in6_u.u6_addr32);
3189 cm_info.ipv4 = false;
3190 cm_info.tos = (ip6h->priority << 4) | (ip6h->flow_lbl[0] >> 4);
3191 }
3192 cm_info.loc_port = ntohs(tcph->dest);
3193 cm_info.rem_port = ntohs(tcph->source);
3194 cm_node = irdma_find_node(cm_core, cm_info.rem_port, cm_info.rem_addr,
3195 cm_info.loc_port, cm_info.loc_addr, cm_info.vlan_id);
3196
3197 if (!cm_node) {
3198 /* Only type of packet accepted are for the
3199 * PASSIVE open (syn only)
3200 */
3201 if (!tcph->syn || tcph->ack)
3202 return;
3203
3204 listener = irdma_find_listener(cm_core,
3205 cm_info.loc_addr,
3206 cm_info.ipv4,
3207 cm_info.loc_port,
3208 cm_info.vlan_id,
3209 IRDMA_CM_LISTENER_ACTIVE_STATE);
3210 if (!listener) {
3211 cm_info.cm_id = NULL;
3212 ibdev_dbg(&cm_core->iwdev->ibdev,
3213 "CM: no listener found\n");
3214 return;
3215 }
3216
3217 cm_info.cm_id = listener->cm_id;
3218 cm_node = irdma_make_cm_node(cm_core, iwdev, &cm_info,
3219 listener);
3220 if (!cm_node) {
3221 ibdev_dbg(&cm_core->iwdev->ibdev,
3222 "CM: allocate node failed\n");
3223 refcount_dec(&listener->refcnt);
3224 return;
3225 }
3226
3227 if (!tcph->rst && !tcph->fin) {
3228 cm_node->state = IRDMA_CM_STATE_LISTENING;
3229 } else {
3230 irdma_rem_ref_cm_node(cm_node);
3231 return;
3232 }
3233
3234 refcount_inc(&cm_node->refcnt);
3235 } else if (cm_node->state == IRDMA_CM_STATE_OFFLOADED) {
3236 irdma_rem_ref_cm_node(cm_node);
3237 return;
3238 }
3239
3240 irdma_process_pkt(cm_node, rbuf);
3241 irdma_rem_ref_cm_node(cm_node);
3242 }
3243
irdma_add_qh(struct irdma_cm_node * cm_node,bool active)3244 static int irdma_add_qh(struct irdma_cm_node *cm_node, bool active)
3245 {
3246 if (!active)
3247 irdma_add_conn_est_qh(cm_node);
3248 return 0;
3249 }
3250
irdma_cm_free_ah_nop(struct irdma_cm_node * cm_node)3251 static void irdma_cm_free_ah_nop(struct irdma_cm_node *cm_node)
3252 {
3253 }
3254
3255 /**
3256 * irdma_setup_cm_core - setup top level instance of a cm core
3257 * @iwdev: iwarp device structure
3258 * @rdma_ver: HW version
3259 */
irdma_setup_cm_core(struct irdma_device * iwdev,u8 rdma_ver)3260 int irdma_setup_cm_core(struct irdma_device *iwdev, u8 rdma_ver)
3261 {
3262 struct irdma_cm_core *cm_core = &iwdev->cm_core;
3263
3264 cm_core->iwdev = iwdev;
3265 cm_core->dev = &iwdev->rf->sc_dev;
3266
3267 /* Handles CM event work items send to Iwarp core */
3268 cm_core->event_wq = alloc_ordered_workqueue("iwarp-event-wq", 0);
3269 if (!cm_core->event_wq)
3270 return -ENOMEM;
3271
3272 INIT_LIST_HEAD(&cm_core->listen_list);
3273
3274 timer_setup(&cm_core->tcp_timer, irdma_cm_timer_tick, 0);
3275
3276 spin_lock_init(&cm_core->ht_lock);
3277 spin_lock_init(&cm_core->listen_list_lock);
3278 spin_lock_init(&cm_core->apbvt_lock);
3279 switch (rdma_ver) {
3280 case IRDMA_GEN_1:
3281 cm_core->form_cm_frame = irdma_form_uda_cm_frame;
3282 cm_core->cm_create_ah = irdma_add_qh;
3283 cm_core->cm_free_ah = irdma_cm_free_ah_nop;
3284 break;
3285 case IRDMA_GEN_2:
3286 default:
3287 cm_core->form_cm_frame = irdma_form_ah_cm_frame;
3288 cm_core->cm_create_ah = irdma_cm_create_ah;
3289 cm_core->cm_free_ah = irdma_cm_free_ah;
3290 }
3291
3292 return 0;
3293 }
3294
3295 /**
3296 * irdma_cleanup_cm_core - deallocate a top level instance of a
3297 * cm core
3298 * @cm_core: cm's core
3299 */
irdma_cleanup_cm_core(struct irdma_cm_core * cm_core)3300 void irdma_cleanup_cm_core(struct irdma_cm_core *cm_core)
3301 {
3302 if (!cm_core)
3303 return;
3304
3305 del_timer_sync(&cm_core->tcp_timer);
3306
3307 destroy_workqueue(cm_core->event_wq);
3308 cm_core->dev->ws_reset(&cm_core->iwdev->vsi);
3309 }
3310
3311 /**
3312 * irdma_init_tcp_ctx - setup qp context
3313 * @cm_node: connection's node
3314 * @tcp_info: offload info for tcp
3315 * @iwqp: associate qp for the connection
3316 */
irdma_init_tcp_ctx(struct irdma_cm_node * cm_node,struct irdma_tcp_offload_info * tcp_info,struct irdma_qp * iwqp)3317 static void irdma_init_tcp_ctx(struct irdma_cm_node *cm_node,
3318 struct irdma_tcp_offload_info *tcp_info,
3319 struct irdma_qp *iwqp)
3320 {
3321 tcp_info->ipv4 = cm_node->ipv4;
3322 tcp_info->drop_ooo_seg = !iwqp->iwdev->iw_ooo;
3323 tcp_info->wscale = true;
3324 tcp_info->ignore_tcp_opt = true;
3325 tcp_info->ignore_tcp_uns_opt = true;
3326 tcp_info->no_nagle = false;
3327
3328 tcp_info->ttl = IRDMA_DEFAULT_TTL;
3329 tcp_info->rtt_var = IRDMA_DEFAULT_RTT_VAR;
3330 tcp_info->ss_thresh = IRDMA_DEFAULT_SS_THRESH;
3331 tcp_info->rexmit_thresh = IRDMA_DEFAULT_REXMIT_THRESH;
3332
3333 tcp_info->tcp_state = IRDMA_TCP_STATE_ESTABLISHED;
3334 tcp_info->snd_wscale = cm_node->tcp_cntxt.snd_wscale;
3335 tcp_info->rcv_wscale = cm_node->tcp_cntxt.rcv_wscale;
3336
3337 tcp_info->snd_nxt = cm_node->tcp_cntxt.loc_seq_num;
3338 tcp_info->snd_wnd = cm_node->tcp_cntxt.snd_wnd;
3339 tcp_info->rcv_nxt = cm_node->tcp_cntxt.rcv_nxt;
3340 tcp_info->snd_max = cm_node->tcp_cntxt.loc_seq_num;
3341
3342 tcp_info->snd_una = cm_node->tcp_cntxt.loc_seq_num;
3343 tcp_info->cwnd = 2 * cm_node->tcp_cntxt.mss;
3344 tcp_info->snd_wl1 = cm_node->tcp_cntxt.rcv_nxt;
3345 tcp_info->snd_wl2 = cm_node->tcp_cntxt.loc_seq_num;
3346 tcp_info->max_snd_window = cm_node->tcp_cntxt.max_snd_wnd;
3347 tcp_info->rcv_wnd = cm_node->tcp_cntxt.rcv_wnd
3348 << cm_node->tcp_cntxt.rcv_wscale;
3349
3350 tcp_info->flow_label = 0;
3351 tcp_info->snd_mss = (u32)cm_node->tcp_cntxt.mss;
3352 tcp_info->tos = cm_node->tos;
3353 if (cm_node->vlan_id < VLAN_N_VID) {
3354 tcp_info->insert_vlan_tag = true;
3355 tcp_info->vlan_tag = cm_node->vlan_id;
3356 tcp_info->vlan_tag |= cm_node->user_pri << VLAN_PRIO_SHIFT;
3357 }
3358 if (cm_node->ipv4) {
3359 tcp_info->src_port = cm_node->loc_port;
3360 tcp_info->dst_port = cm_node->rem_port;
3361
3362 tcp_info->dest_ip_addr[3] = cm_node->rem_addr[0];
3363 tcp_info->local_ipaddr[3] = cm_node->loc_addr[0];
3364 tcp_info->arp_idx = (u16)irdma_arp_table(iwqp->iwdev->rf,
3365 &tcp_info->dest_ip_addr[3],
3366 true, NULL,
3367 IRDMA_ARP_RESOLVE);
3368 } else {
3369 tcp_info->src_port = cm_node->loc_port;
3370 tcp_info->dst_port = cm_node->rem_port;
3371 memcpy(tcp_info->dest_ip_addr, cm_node->rem_addr,
3372 sizeof(tcp_info->dest_ip_addr));
3373 memcpy(tcp_info->local_ipaddr, cm_node->loc_addr,
3374 sizeof(tcp_info->local_ipaddr));
3375
3376 tcp_info->arp_idx = (u16)irdma_arp_table(iwqp->iwdev->rf,
3377 &tcp_info->dest_ip_addr[0],
3378 false, NULL,
3379 IRDMA_ARP_RESOLVE);
3380 }
3381 }
3382
3383 /**
3384 * irdma_cm_init_tsa_conn - setup qp for RTS
3385 * @iwqp: associate qp for the connection
3386 * @cm_node: connection's node
3387 */
irdma_cm_init_tsa_conn(struct irdma_qp * iwqp,struct irdma_cm_node * cm_node)3388 static void irdma_cm_init_tsa_conn(struct irdma_qp *iwqp,
3389 struct irdma_cm_node *cm_node)
3390 {
3391 struct irdma_iwarp_offload_info *iwarp_info;
3392 struct irdma_qp_host_ctx_info *ctx_info;
3393
3394 iwarp_info = &iwqp->iwarp_info;
3395 ctx_info = &iwqp->ctx_info;
3396
3397 ctx_info->tcp_info = &iwqp->tcp_info;
3398 ctx_info->send_cq_num = iwqp->iwscq->sc_cq.cq_uk.cq_id;
3399 ctx_info->rcv_cq_num = iwqp->iwrcq->sc_cq.cq_uk.cq_id;
3400
3401 iwarp_info->ord_size = cm_node->ord_size;
3402 iwarp_info->ird_size = cm_node->ird_size;
3403 iwarp_info->rd_en = true;
3404 iwarp_info->rdmap_ver = 1;
3405 iwarp_info->ddp_ver = 1;
3406 iwarp_info->pd_id = iwqp->iwpd->sc_pd.pd_id;
3407
3408 ctx_info->tcp_info_valid = true;
3409 ctx_info->iwarp_info_valid = true;
3410 ctx_info->user_pri = cm_node->user_pri;
3411
3412 irdma_init_tcp_ctx(cm_node, &iwqp->tcp_info, iwqp);
3413 if (cm_node->snd_mark_en) {
3414 iwarp_info->snd_mark_en = true;
3415 iwarp_info->snd_mark_offset = (iwqp->tcp_info.snd_nxt & SNDMARKER_SEQNMASK) +
3416 cm_node->lsmm_size;
3417 }
3418
3419 cm_node->state = IRDMA_CM_STATE_OFFLOADED;
3420 iwqp->tcp_info.tcp_state = IRDMA_TCP_STATE_ESTABLISHED;
3421 iwqp->tcp_info.src_mac_addr_idx = iwqp->iwdev->mac_ip_table_idx;
3422
3423 if (cm_node->rcv_mark_en) {
3424 iwarp_info->rcv_mark_en = true;
3425 iwarp_info->align_hdrs = true;
3426 }
3427
3428 irdma_sc_qp_setctx(&iwqp->sc_qp, iwqp->host_ctx.va, ctx_info);
3429
3430 /* once tcp_info is set, no need to do it again */
3431 ctx_info->tcp_info_valid = false;
3432 ctx_info->iwarp_info_valid = false;
3433 }
3434
3435 /**
3436 * irdma_cm_disconn - when a connection is being closed
3437 * @iwqp: associated qp for the connection
3438 */
irdma_cm_disconn(struct irdma_qp * iwqp)3439 void irdma_cm_disconn(struct irdma_qp *iwqp)
3440 {
3441 struct irdma_device *iwdev = iwqp->iwdev;
3442 struct disconn_work *work;
3443 unsigned long flags;
3444
3445 work = kzalloc(sizeof(*work), GFP_ATOMIC);
3446 if (!work)
3447 return;
3448
3449 spin_lock_irqsave(&iwdev->rf->qptable_lock, flags);
3450 if (!iwdev->rf->qp_table[iwqp->ibqp.qp_num]) {
3451 spin_unlock_irqrestore(&iwdev->rf->qptable_lock, flags);
3452 ibdev_dbg(&iwdev->ibdev,
3453 "CM: qp_id %d is already freed\n",
3454 iwqp->ibqp.qp_num);
3455 kfree(work);
3456 return;
3457 }
3458 irdma_qp_add_ref(&iwqp->ibqp);
3459 spin_unlock_irqrestore(&iwdev->rf->qptable_lock, flags);
3460
3461 work->iwqp = iwqp;
3462 INIT_WORK(&work->work, irdma_disconnect_worker);
3463 queue_work(iwdev->cleanup_wq, &work->work);
3464 }
3465
3466 /**
3467 * irdma_qp_disconnect - free qp and close cm
3468 * @iwqp: associate qp for the connection
3469 */
irdma_qp_disconnect(struct irdma_qp * iwqp)3470 static void irdma_qp_disconnect(struct irdma_qp *iwqp)
3471 {
3472 struct irdma_device *iwdev = iwqp->iwdev;
3473
3474 iwqp->active_conn = 0;
3475 /* close the CM node down if it is still active */
3476 ibdev_dbg(&iwdev->ibdev, "CM: Call close API\n");
3477 irdma_cm_close(iwqp->cm_node);
3478 }
3479
3480 /**
3481 * irdma_cm_disconn_true - called by worker thread to disconnect qp
3482 * @iwqp: associate qp for the connection
3483 */
irdma_cm_disconn_true(struct irdma_qp * iwqp)3484 static void irdma_cm_disconn_true(struct irdma_qp *iwqp)
3485 {
3486 struct iw_cm_id *cm_id;
3487 struct irdma_device *iwdev;
3488 struct irdma_sc_qp *qp = &iwqp->sc_qp;
3489 u16 last_ae;
3490 u8 original_hw_tcp_state;
3491 u8 original_ibqp_state;
3492 int disconn_status = 0;
3493 int issue_disconn = 0;
3494 int issue_close = 0;
3495 int issue_flush = 0;
3496 unsigned long flags;
3497 int err;
3498
3499 iwdev = iwqp->iwdev;
3500 spin_lock_irqsave(&iwqp->lock, flags);
3501 if (rdma_protocol_roce(&iwdev->ibdev, 1)) {
3502 struct ib_qp_attr attr;
3503
3504 if (iwqp->flush_issued || iwqp->sc_qp.qp_uk.destroy_pending) {
3505 spin_unlock_irqrestore(&iwqp->lock, flags);
3506 return;
3507 }
3508
3509 spin_unlock_irqrestore(&iwqp->lock, flags);
3510
3511 attr.qp_state = IB_QPS_ERR;
3512 irdma_modify_qp_roce(&iwqp->ibqp, &attr, IB_QP_STATE, NULL);
3513 irdma_ib_qp_event(iwqp, qp->event_type);
3514 return;
3515 }
3516
3517 cm_id = iwqp->cm_id;
3518 original_hw_tcp_state = iwqp->hw_tcp_state;
3519 original_ibqp_state = iwqp->ibqp_state;
3520 last_ae = iwqp->last_aeq;
3521
3522 if (qp->term_flags) {
3523 issue_disconn = 1;
3524 issue_close = 1;
3525 iwqp->cm_id = NULL;
3526 irdma_terminate_del_timer(qp);
3527 if (!iwqp->flush_issued) {
3528 iwqp->flush_issued = 1;
3529 issue_flush = 1;
3530 }
3531 } else if ((original_hw_tcp_state == IRDMA_TCP_STATE_CLOSE_WAIT) ||
3532 ((original_ibqp_state == IB_QPS_RTS) &&
3533 (last_ae == IRDMA_AE_LLP_CONNECTION_RESET))) {
3534 issue_disconn = 1;
3535 if (last_ae == IRDMA_AE_LLP_CONNECTION_RESET)
3536 disconn_status = -ECONNRESET;
3537 }
3538
3539 if (original_hw_tcp_state == IRDMA_TCP_STATE_CLOSED ||
3540 original_hw_tcp_state == IRDMA_TCP_STATE_TIME_WAIT ||
3541 last_ae == IRDMA_AE_RDMAP_ROE_BAD_LLP_CLOSE ||
3542 last_ae == IRDMA_AE_BAD_CLOSE ||
3543 last_ae == IRDMA_AE_LLP_CONNECTION_RESET || iwdev->rf->reset || !cm_id) {
3544 issue_close = 1;
3545 iwqp->cm_id = NULL;
3546 qp->term_flags = 0;
3547 if (!iwqp->flush_issued) {
3548 iwqp->flush_issued = 1;
3549 issue_flush = 1;
3550 }
3551 }
3552
3553 spin_unlock_irqrestore(&iwqp->lock, flags);
3554 if (issue_flush && !iwqp->sc_qp.qp_uk.destroy_pending) {
3555 irdma_flush_wqes(iwqp, IRDMA_FLUSH_SQ | IRDMA_FLUSH_RQ |
3556 IRDMA_FLUSH_WAIT);
3557
3558 if (qp->term_flags)
3559 irdma_ib_qp_event(iwqp, qp->event_type);
3560 }
3561
3562 if (!cm_id || !cm_id->event_handler)
3563 return;
3564
3565 spin_lock_irqsave(&iwdev->cm_core.ht_lock, flags);
3566 if (!iwqp->cm_node) {
3567 spin_unlock_irqrestore(&iwdev->cm_core.ht_lock, flags);
3568 return;
3569 }
3570 refcount_inc(&iwqp->cm_node->refcnt);
3571
3572 spin_unlock_irqrestore(&iwdev->cm_core.ht_lock, flags);
3573
3574 if (issue_disconn) {
3575 err = irdma_send_cm_event(iwqp->cm_node, cm_id,
3576 IW_CM_EVENT_DISCONNECT,
3577 disconn_status);
3578 if (err)
3579 ibdev_dbg(&iwdev->ibdev,
3580 "CM: disconnect event failed: - cm_id = %p\n",
3581 cm_id);
3582 }
3583 if (issue_close) {
3584 cm_id->provider_data = iwqp;
3585 err = irdma_send_cm_event(iwqp->cm_node, cm_id,
3586 IW_CM_EVENT_CLOSE, 0);
3587 if (err)
3588 ibdev_dbg(&iwdev->ibdev,
3589 "CM: close event failed: - cm_id = %p\n",
3590 cm_id);
3591 irdma_qp_disconnect(iwqp);
3592 }
3593 irdma_rem_ref_cm_node(iwqp->cm_node);
3594 }
3595
3596 /**
3597 * irdma_disconnect_worker - worker for connection close
3598 * @work: points or disconn structure
3599 */
irdma_disconnect_worker(struct work_struct * work)3600 static void irdma_disconnect_worker(struct work_struct *work)
3601 {
3602 struct disconn_work *dwork = container_of(work, struct disconn_work, work);
3603 struct irdma_qp *iwqp = dwork->iwqp;
3604
3605 kfree(dwork);
3606 irdma_cm_disconn_true(iwqp);
3607 irdma_qp_rem_ref(&iwqp->ibqp);
3608 }
3609
3610 /**
3611 * irdma_free_lsmm_rsrc - free lsmm memory and deregister
3612 * @iwqp: associate qp for the connection
3613 */
irdma_free_lsmm_rsrc(struct irdma_qp * iwqp)3614 void irdma_free_lsmm_rsrc(struct irdma_qp *iwqp)
3615 {
3616 struct irdma_device *iwdev;
3617
3618 iwdev = iwqp->iwdev;
3619
3620 if (iwqp->ietf_mem.va) {
3621 if (iwqp->lsmm_mr)
3622 iwdev->ibdev.ops.dereg_mr(iwqp->lsmm_mr, NULL);
3623 dma_free_coherent(iwdev->rf->sc_dev.hw->device,
3624 iwqp->ietf_mem.size, iwqp->ietf_mem.va,
3625 iwqp->ietf_mem.pa);
3626 iwqp->ietf_mem.va = NULL;
3627 }
3628 }
3629
3630 /**
3631 * irdma_accept - registered call for connection to be accepted
3632 * @cm_id: cm information for passive connection
3633 * @conn_param: accpet parameters
3634 */
irdma_accept(struct iw_cm_id * cm_id,struct iw_cm_conn_param * conn_param)3635 int irdma_accept(struct iw_cm_id *cm_id, struct iw_cm_conn_param *conn_param)
3636 {
3637 struct ib_qp *ibqp;
3638 struct irdma_qp *iwqp;
3639 struct irdma_device *iwdev;
3640 struct irdma_sc_dev *dev;
3641 struct irdma_cm_node *cm_node;
3642 struct ib_qp_attr attr = {};
3643 int passive_state;
3644 struct ib_mr *ibmr;
3645 struct irdma_pd *iwpd;
3646 u16 buf_len = 0;
3647 struct irdma_kmem_info accept;
3648 u64 tagged_offset;
3649 int wait_ret;
3650 int ret = 0;
3651
3652 ibqp = irdma_get_qp(cm_id->device, conn_param->qpn);
3653 if (!ibqp)
3654 return -EINVAL;
3655
3656 iwqp = to_iwqp(ibqp);
3657 iwdev = iwqp->iwdev;
3658 dev = &iwdev->rf->sc_dev;
3659 cm_node = cm_id->provider_data;
3660
3661 if (((struct sockaddr_in *)&cm_id->local_addr)->sin_family == AF_INET) {
3662 cm_node->ipv4 = true;
3663 cm_node->vlan_id = irdma_get_vlan_ipv4(cm_node->loc_addr);
3664 } else {
3665 cm_node->ipv4 = false;
3666 irdma_get_vlan_mac_ipv6(cm_node->loc_addr, &cm_node->vlan_id,
3667 NULL);
3668 }
3669 ibdev_dbg(&iwdev->ibdev, "CM: Accept vlan_id=%d\n",
3670 cm_node->vlan_id);
3671
3672 trace_irdma_accept(cm_node, 0, NULL);
3673
3674 if (cm_node->state == IRDMA_CM_STATE_LISTENER_DESTROYED) {
3675 ret = -EINVAL;
3676 goto error;
3677 }
3678
3679 passive_state = atomic_add_return(1, &cm_node->passive_state);
3680 if (passive_state == IRDMA_SEND_RESET_EVENT) {
3681 ret = -ECONNRESET;
3682 goto error;
3683 }
3684
3685 buf_len = conn_param->private_data_len + IRDMA_MAX_IETF_SIZE;
3686 iwqp->ietf_mem.size = ALIGN(buf_len, 1);
3687 iwqp->ietf_mem.va = dma_alloc_coherent(dev->hw->device,
3688 iwqp->ietf_mem.size,
3689 &iwqp->ietf_mem.pa, GFP_KERNEL);
3690 if (!iwqp->ietf_mem.va) {
3691 ret = -ENOMEM;
3692 goto error;
3693 }
3694
3695 cm_node->pdata.size = conn_param->private_data_len;
3696 accept.addr = iwqp->ietf_mem.va;
3697 accept.size = irdma_cm_build_mpa_frame(cm_node, &accept, MPA_KEY_REPLY);
3698 memcpy((u8 *)accept.addr + accept.size, conn_param->private_data,
3699 conn_param->private_data_len);
3700
3701 if (cm_node->dev->ws_add(iwqp->sc_qp.vsi, cm_node->user_pri)) {
3702 ret = -ENOMEM;
3703 goto error;
3704 }
3705 iwqp->sc_qp.user_pri = cm_node->user_pri;
3706 irdma_qp_add_qos(&iwqp->sc_qp);
3707 /* setup our first outgoing iWarp send WQE (the IETF frame response) */
3708 iwpd = iwqp->iwpd;
3709 tagged_offset = (uintptr_t)iwqp->ietf_mem.va;
3710 ibmr = irdma_reg_phys_mr(&iwpd->ibpd, iwqp->ietf_mem.pa, buf_len,
3711 IB_ACCESS_LOCAL_WRITE, &tagged_offset);
3712 if (IS_ERR(ibmr)) {
3713 ret = -ENOMEM;
3714 goto error;
3715 }
3716
3717 ibmr->pd = &iwpd->ibpd;
3718 ibmr->device = iwpd->ibpd.device;
3719 iwqp->lsmm_mr = ibmr;
3720 if (iwqp->page)
3721 iwqp->sc_qp.qp_uk.sq_base = kmap_local_page(iwqp->page);
3722
3723 cm_node->lsmm_size = accept.size + conn_param->private_data_len;
3724 irdma_sc_send_lsmm(&iwqp->sc_qp, iwqp->ietf_mem.va, cm_node->lsmm_size,
3725 ibmr->lkey);
3726
3727 if (iwqp->page)
3728 kunmap_local(iwqp->sc_qp.qp_uk.sq_base);
3729
3730 iwqp->cm_id = cm_id;
3731 cm_node->cm_id = cm_id;
3732
3733 cm_id->provider_data = iwqp;
3734 iwqp->active_conn = 0;
3735 iwqp->cm_node = cm_node;
3736 cm_node->iwqp = iwqp;
3737 irdma_cm_init_tsa_conn(iwqp, cm_node);
3738 irdma_qp_add_ref(&iwqp->ibqp);
3739 cm_id->add_ref(cm_id);
3740
3741 attr.qp_state = IB_QPS_RTS;
3742 cm_node->qhash_set = false;
3743 cm_node->cm_core->cm_free_ah(cm_node);
3744
3745 irdma_modify_qp(&iwqp->ibqp, &attr, IB_QP_STATE, NULL);
3746 if (dev->hw_attrs.uk_attrs.feature_flags & IRDMA_FEATURE_RTS_AE) {
3747 wait_ret = wait_event_interruptible_timeout(iwqp->waitq,
3748 iwqp->rts_ae_rcvd,
3749 IRDMA_MAX_TIMEOUT);
3750 if (!wait_ret) {
3751 ibdev_dbg(&iwdev->ibdev,
3752 "CM: Slow Connection: cm_node=%p, loc_port=%d, rem_port=%d, cm_id=%p\n",
3753 cm_node, cm_node->loc_port,
3754 cm_node->rem_port, cm_node->cm_id);
3755 ret = -ECONNRESET;
3756 goto error;
3757 }
3758 }
3759
3760 irdma_send_cm_event(cm_node, cm_id, IW_CM_EVENT_ESTABLISHED, 0);
3761 cm_node->accelerated = true;
3762 complete(&cm_node->establish_comp);
3763
3764 if (cm_node->accept_pend) {
3765 atomic_dec(&cm_node->listener->pend_accepts_cnt);
3766 cm_node->accept_pend = 0;
3767 }
3768
3769 ibdev_dbg(&iwdev->ibdev,
3770 "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",
3771 cm_node->rem_port, cm_node->loc_port, cm_node->rem_addr,
3772 cm_node->loc_addr, cm_node, cm_id, ibqp->qp_num);
3773 cm_node->cm_core->stats_accepts++;
3774
3775 return 0;
3776 error:
3777 irdma_free_lsmm_rsrc(iwqp);
3778 irdma_rem_ref_cm_node(cm_node);
3779
3780 return ret;
3781 }
3782
3783 /**
3784 * irdma_reject - registered call for connection to be rejected
3785 * @cm_id: cm information for passive connection
3786 * @pdata: private data to be sent
3787 * @pdata_len: private data length
3788 */
irdma_reject(struct iw_cm_id * cm_id,const void * pdata,u8 pdata_len)3789 int irdma_reject(struct iw_cm_id *cm_id, const void *pdata, u8 pdata_len)
3790 {
3791 struct irdma_device *iwdev;
3792 struct irdma_cm_node *cm_node;
3793
3794 cm_node = cm_id->provider_data;
3795 cm_node->pdata.size = pdata_len;
3796
3797 trace_irdma_reject(cm_node, 0, NULL);
3798
3799 iwdev = to_iwdev(cm_id->device);
3800 if (!iwdev)
3801 return -EINVAL;
3802
3803 cm_node->cm_core->stats_rejects++;
3804
3805 if (pdata_len + sizeof(struct ietf_mpa_v2) > IRDMA_MAX_CM_BUF)
3806 return -EINVAL;
3807
3808 return irdma_cm_reject(cm_node, pdata, pdata_len);
3809 }
3810
3811 /**
3812 * irdma_connect - registered call for connection to be established
3813 * @cm_id: cm information for passive connection
3814 * @conn_param: Information about the connection
3815 */
irdma_connect(struct iw_cm_id * cm_id,struct iw_cm_conn_param * conn_param)3816 int irdma_connect(struct iw_cm_id *cm_id, struct iw_cm_conn_param *conn_param)
3817 {
3818 struct ib_qp *ibqp;
3819 struct irdma_qp *iwqp;
3820 struct irdma_device *iwdev;
3821 struct irdma_cm_node *cm_node;
3822 struct irdma_cm_info cm_info;
3823 struct sockaddr_in *laddr;
3824 struct sockaddr_in *raddr;
3825 struct sockaddr_in6 *laddr6;
3826 struct sockaddr_in6 *raddr6;
3827 int ret = 0;
3828
3829 ibqp = irdma_get_qp(cm_id->device, conn_param->qpn);
3830 if (!ibqp)
3831 return -EINVAL;
3832 iwqp = to_iwqp(ibqp);
3833 if (!iwqp)
3834 return -EINVAL;
3835 iwdev = iwqp->iwdev;
3836 if (!iwdev)
3837 return -EINVAL;
3838
3839 laddr = (struct sockaddr_in *)&cm_id->m_local_addr;
3840 raddr = (struct sockaddr_in *)&cm_id->m_remote_addr;
3841 laddr6 = (struct sockaddr_in6 *)&cm_id->m_local_addr;
3842 raddr6 = (struct sockaddr_in6 *)&cm_id->m_remote_addr;
3843
3844 if (!(laddr->sin_port) || !(raddr->sin_port))
3845 return -EINVAL;
3846
3847 iwqp->active_conn = 1;
3848 iwqp->cm_id = NULL;
3849 cm_id->provider_data = iwqp;
3850
3851 /* set up the connection params for the node */
3852 if (cm_id->remote_addr.ss_family == AF_INET) {
3853 if (iwdev->vsi.mtu < IRDMA_MIN_MTU_IPV4)
3854 return -EINVAL;
3855
3856 cm_info.ipv4 = true;
3857 memset(cm_info.loc_addr, 0, sizeof(cm_info.loc_addr));
3858 memset(cm_info.rem_addr, 0, sizeof(cm_info.rem_addr));
3859 cm_info.loc_addr[0] = ntohl(laddr->sin_addr.s_addr);
3860 cm_info.rem_addr[0] = ntohl(raddr->sin_addr.s_addr);
3861 cm_info.loc_port = ntohs(laddr->sin_port);
3862 cm_info.rem_port = ntohs(raddr->sin_port);
3863 cm_info.vlan_id = irdma_get_vlan_ipv4(cm_info.loc_addr);
3864 } else {
3865 if (iwdev->vsi.mtu < IRDMA_MIN_MTU_IPV6)
3866 return -EINVAL;
3867
3868 cm_info.ipv4 = false;
3869 irdma_copy_ip_ntohl(cm_info.loc_addr,
3870 laddr6->sin6_addr.in6_u.u6_addr32);
3871 irdma_copy_ip_ntohl(cm_info.rem_addr,
3872 raddr6->sin6_addr.in6_u.u6_addr32);
3873 cm_info.loc_port = ntohs(laddr6->sin6_port);
3874 cm_info.rem_port = ntohs(raddr6->sin6_port);
3875 irdma_get_vlan_mac_ipv6(cm_info.loc_addr, &cm_info.vlan_id,
3876 NULL);
3877 }
3878 cm_info.cm_id = cm_id;
3879 cm_info.qh_qpid = iwdev->vsi.ilq->qp_id;
3880 cm_info.tos = cm_id->tos;
3881 if (iwdev->vsi.dscp_mode) {
3882 cm_info.user_pri =
3883 iwqp->sc_qp.vsi->dscp_map[irdma_tos2dscp(cm_info.tos)];
3884 } else {
3885 cm_info.user_pri = rt_tos2priority(cm_id->tos);
3886 cm_info.user_pri = irdma_iw_get_vlan_prio(cm_info.loc_addr,
3887 cm_info.user_pri,
3888 cm_info.ipv4);
3889 }
3890
3891 if (iwqp->sc_qp.dev->ws_add(iwqp->sc_qp.vsi, cm_info.user_pri))
3892 return -ENOMEM;
3893 iwqp->sc_qp.user_pri = cm_info.user_pri;
3894 irdma_qp_add_qos(&iwqp->sc_qp);
3895 ibdev_dbg(&iwdev->ibdev, "DCB: TOS:[%d] UP:[%d]\n", cm_id->tos,
3896 cm_info.user_pri);
3897
3898 trace_irdma_dcb_tos(iwdev, cm_id->tos, cm_info.user_pri);
3899
3900 ret = irdma_create_cm_node(&iwdev->cm_core, iwdev, conn_param, &cm_info,
3901 &cm_node);
3902 if (ret)
3903 return ret;
3904 ret = cm_node->cm_core->cm_create_ah(cm_node, true);
3905 if (ret)
3906 goto err;
3907 if (irdma_manage_qhash(iwdev, &cm_info,
3908 IRDMA_QHASH_TYPE_TCP_ESTABLISHED,
3909 IRDMA_QHASH_MANAGE_TYPE_ADD, NULL, true)) {
3910 ret = -EINVAL;
3911 goto err;
3912 }
3913 cm_node->qhash_set = true;
3914
3915 cm_node->apbvt_entry = irdma_add_apbvt(iwdev, cm_info.loc_port);
3916 if (!cm_node->apbvt_entry) {
3917 ret = -EINVAL;
3918 goto err;
3919 }
3920
3921 cm_node->apbvt_set = true;
3922 iwqp->cm_node = cm_node;
3923 cm_node->iwqp = iwqp;
3924 iwqp->cm_id = cm_id;
3925 irdma_qp_add_ref(&iwqp->ibqp);
3926 cm_id->add_ref(cm_id);
3927
3928 if (cm_node->state != IRDMA_CM_STATE_OFFLOADED) {
3929 cm_node->state = IRDMA_CM_STATE_SYN_SENT;
3930 ret = irdma_send_syn(cm_node, 0);
3931 if (ret)
3932 goto err;
3933 }
3934
3935 ibdev_dbg(&iwdev->ibdev,
3936 "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",
3937 cm_node->rem_port, cm_node->loc_port, cm_node->rem_addr,
3938 cm_node->loc_addr, cm_node, cm_id, ibqp->qp_num);
3939
3940 trace_irdma_connect(cm_node, 0, NULL);
3941
3942 return 0;
3943
3944 err:
3945 if (cm_info.ipv4)
3946 ibdev_dbg(&iwdev->ibdev,
3947 "CM: connect() FAILED: dest addr=%pI4",
3948 cm_info.rem_addr);
3949 else
3950 ibdev_dbg(&iwdev->ibdev,
3951 "CM: connect() FAILED: dest addr=%pI6",
3952 cm_info.rem_addr);
3953 irdma_rem_ref_cm_node(cm_node);
3954 iwdev->cm_core.stats_connect_errs++;
3955
3956 return ret;
3957 }
3958
3959 /**
3960 * irdma_create_listen - registered call creating listener
3961 * @cm_id: cm information for passive connection
3962 * @backlog: to max accept pending count
3963 */
irdma_create_listen(struct iw_cm_id * cm_id,int backlog)3964 int irdma_create_listen(struct iw_cm_id *cm_id, int backlog)
3965 {
3966 struct irdma_device *iwdev;
3967 struct irdma_cm_listener *cm_listen_node;
3968 struct irdma_cm_info cm_info = {};
3969 struct sockaddr_in *laddr;
3970 struct sockaddr_in6 *laddr6;
3971 bool wildcard = false;
3972 int err;
3973
3974 iwdev = to_iwdev(cm_id->device);
3975 if (!iwdev)
3976 return -EINVAL;
3977
3978 laddr = (struct sockaddr_in *)&cm_id->m_local_addr;
3979 laddr6 = (struct sockaddr_in6 *)&cm_id->m_local_addr;
3980 cm_info.qh_qpid = iwdev->vsi.ilq->qp_id;
3981
3982 if (laddr->sin_family == AF_INET) {
3983 if (iwdev->vsi.mtu < IRDMA_MIN_MTU_IPV4)
3984 return -EINVAL;
3985
3986 cm_info.ipv4 = true;
3987 cm_info.loc_addr[0] = ntohl(laddr->sin_addr.s_addr);
3988 cm_info.loc_port = ntohs(laddr->sin_port);
3989
3990 if (laddr->sin_addr.s_addr != htonl(INADDR_ANY)) {
3991 cm_info.vlan_id = irdma_get_vlan_ipv4(cm_info.loc_addr);
3992 } else {
3993 cm_info.vlan_id = 0xFFFF;
3994 wildcard = true;
3995 }
3996 } else {
3997 if (iwdev->vsi.mtu < IRDMA_MIN_MTU_IPV6)
3998 return -EINVAL;
3999
4000 cm_info.ipv4 = false;
4001 irdma_copy_ip_ntohl(cm_info.loc_addr,
4002 laddr6->sin6_addr.in6_u.u6_addr32);
4003 cm_info.loc_port = ntohs(laddr6->sin6_port);
4004 if (ipv6_addr_type(&laddr6->sin6_addr) != IPV6_ADDR_ANY) {
4005 irdma_get_vlan_mac_ipv6(cm_info.loc_addr,
4006 &cm_info.vlan_id, NULL);
4007 } else {
4008 cm_info.vlan_id = 0xFFFF;
4009 wildcard = true;
4010 }
4011 }
4012
4013 if (cm_info.vlan_id >= VLAN_N_VID && iwdev->dcb_vlan_mode)
4014 cm_info.vlan_id = 0;
4015 cm_info.backlog = backlog;
4016 cm_info.cm_id = cm_id;
4017
4018 trace_irdma_create_listen(iwdev, &cm_info);
4019
4020 cm_listen_node = irdma_make_listen_node(&iwdev->cm_core, iwdev,
4021 &cm_info);
4022 if (!cm_listen_node) {
4023 ibdev_dbg(&iwdev->ibdev,
4024 "CM: cm_listen_node == NULL\n");
4025 return -ENOMEM;
4026 }
4027
4028 cm_id->provider_data = cm_listen_node;
4029
4030 cm_listen_node->tos = cm_id->tos;
4031 if (iwdev->vsi.dscp_mode)
4032 cm_listen_node->user_pri =
4033 iwdev->vsi.dscp_map[irdma_tos2dscp(cm_id->tos)];
4034 else
4035 cm_listen_node->user_pri = rt_tos2priority(cm_id->tos);
4036 cm_info.user_pri = cm_listen_node->user_pri;
4037 if (!cm_listen_node->reused_node) {
4038 if (wildcard) {
4039 err = irdma_add_mqh(iwdev, &cm_info, cm_listen_node);
4040 if (err)
4041 goto error;
4042 } else {
4043 if (!iwdev->vsi.dscp_mode)
4044 cm_listen_node->user_pri =
4045 irdma_iw_get_vlan_prio(cm_info.loc_addr,
4046 cm_info.user_pri,
4047 cm_info.ipv4);
4048 cm_info.user_pri = cm_listen_node->user_pri;
4049 err = irdma_manage_qhash(iwdev, &cm_info,
4050 IRDMA_QHASH_TYPE_TCP_SYN,
4051 IRDMA_QHASH_MANAGE_TYPE_ADD,
4052 NULL, true);
4053 if (err)
4054 goto error;
4055
4056 cm_listen_node->qhash_set = true;
4057 }
4058
4059 cm_listen_node->apbvt_entry = irdma_add_apbvt(iwdev,
4060 cm_info.loc_port);
4061 if (!cm_listen_node->apbvt_entry)
4062 goto error;
4063 }
4064 cm_id->add_ref(cm_id);
4065 cm_listen_node->cm_core->stats_listen_created++;
4066 ibdev_dbg(&iwdev->ibdev,
4067 "CM: loc_port=0x%04x loc_addr=%pI4 cm_listen_node=%p cm_id=%p qhash_set=%d vlan_id=%d\n",
4068 cm_listen_node->loc_port, cm_listen_node->loc_addr,
4069 cm_listen_node, cm_listen_node->cm_id,
4070 cm_listen_node->qhash_set, cm_listen_node->vlan_id);
4071
4072 return 0;
4073
4074 error:
4075
4076 irdma_cm_del_listen(&iwdev->cm_core, cm_listen_node, false);
4077
4078 return -EINVAL;
4079 }
4080
4081 /**
4082 * irdma_destroy_listen - registered call to destroy listener
4083 * @cm_id: cm information for passive connection
4084 */
irdma_destroy_listen(struct iw_cm_id * cm_id)4085 int irdma_destroy_listen(struct iw_cm_id *cm_id)
4086 {
4087 struct irdma_device *iwdev;
4088
4089 iwdev = to_iwdev(cm_id->device);
4090 if (cm_id->provider_data)
4091 irdma_cm_del_listen(&iwdev->cm_core, cm_id->provider_data,
4092 true);
4093 else
4094 ibdev_dbg(&iwdev->ibdev,
4095 "CM: cm_id->provider_data was NULL\n");
4096
4097 cm_id->rem_ref(cm_id);
4098
4099 return 0;
4100 }
4101
4102 /**
4103 * irdma_teardown_list_prep - add conn nodes slated for tear down to list
4104 * @cm_core: cm's core
4105 * @teardown_list: a list to which cm_node will be selected
4106 * @ipaddr: pointer to ip address
4107 * @nfo: pointer to cm_info structure instance
4108 * @disconnect_all: flag indicating disconnect all QPs
4109 */
irdma_teardown_list_prep(struct irdma_cm_core * cm_core,struct list_head * teardown_list,u32 * ipaddr,struct irdma_cm_info * nfo,bool disconnect_all)4110 static void irdma_teardown_list_prep(struct irdma_cm_core *cm_core,
4111 struct list_head *teardown_list,
4112 u32 *ipaddr,
4113 struct irdma_cm_info *nfo,
4114 bool disconnect_all)
4115 {
4116 struct irdma_cm_node *cm_node;
4117 int bkt;
4118
4119 hash_for_each_rcu(cm_core->cm_hash_tbl, bkt, cm_node, list) {
4120 if ((disconnect_all ||
4121 (nfo->vlan_id == cm_node->vlan_id &&
4122 !memcmp(cm_node->loc_addr, ipaddr, nfo->ipv4 ? 4 : 16))) &&
4123 refcount_inc_not_zero(&cm_node->refcnt))
4124 list_add(&cm_node->teardown_entry, teardown_list);
4125 }
4126 }
4127
4128 /**
4129 * irdma_cm_event_connected - handle connected active node
4130 * @event: the info for cm_node of connection
4131 */
irdma_cm_event_connected(struct irdma_cm_event * event)4132 static void irdma_cm_event_connected(struct irdma_cm_event *event)
4133 {
4134 struct irdma_qp *iwqp;
4135 struct irdma_device *iwdev;
4136 struct irdma_cm_node *cm_node;
4137 struct irdma_sc_dev *dev;
4138 struct ib_qp_attr attr = {};
4139 struct iw_cm_id *cm_id;
4140 int status;
4141 bool read0;
4142 int wait_ret = 0;
4143
4144 cm_node = event->cm_node;
4145 cm_id = cm_node->cm_id;
4146 iwqp = cm_id->provider_data;
4147 iwdev = iwqp->iwdev;
4148 dev = &iwdev->rf->sc_dev;
4149 if (iwqp->sc_qp.qp_uk.destroy_pending) {
4150 status = -ETIMEDOUT;
4151 goto error;
4152 }
4153
4154 irdma_cm_init_tsa_conn(iwqp, cm_node);
4155 read0 = (cm_node->send_rdma0_op == SEND_RDMA_READ_ZERO);
4156 if (iwqp->page)
4157 iwqp->sc_qp.qp_uk.sq_base = kmap_local_page(iwqp->page);
4158 irdma_sc_send_rtt(&iwqp->sc_qp, read0);
4159 if (iwqp->page)
4160 kunmap_local(iwqp->sc_qp.qp_uk.sq_base);
4161
4162 attr.qp_state = IB_QPS_RTS;
4163 cm_node->qhash_set = false;
4164 irdma_modify_qp(&iwqp->ibqp, &attr, IB_QP_STATE, NULL);
4165 if (dev->hw_attrs.uk_attrs.feature_flags & IRDMA_FEATURE_RTS_AE) {
4166 wait_ret = wait_event_interruptible_timeout(iwqp->waitq,
4167 iwqp->rts_ae_rcvd,
4168 IRDMA_MAX_TIMEOUT);
4169 if (!wait_ret)
4170 ibdev_dbg(&iwdev->ibdev,
4171 "CM: Slow Connection: cm_node=%p, loc_port=%d, rem_port=%d, cm_id=%p\n",
4172 cm_node, cm_node->loc_port,
4173 cm_node->rem_port, cm_node->cm_id);
4174 }
4175
4176 irdma_send_cm_event(cm_node, cm_id, IW_CM_EVENT_CONNECT_REPLY, 0);
4177 cm_node->accelerated = true;
4178 complete(&cm_node->establish_comp);
4179 cm_node->cm_core->cm_free_ah(cm_node);
4180 return;
4181
4182 error:
4183 iwqp->cm_id = NULL;
4184 cm_id->provider_data = NULL;
4185 irdma_send_cm_event(event->cm_node, cm_id, IW_CM_EVENT_CONNECT_REPLY,
4186 status);
4187 irdma_rem_ref_cm_node(event->cm_node);
4188 }
4189
4190 /**
4191 * irdma_cm_event_reset - handle reset
4192 * @event: the info for cm_node of connection
4193 */
irdma_cm_event_reset(struct irdma_cm_event * event)4194 static void irdma_cm_event_reset(struct irdma_cm_event *event)
4195 {
4196 struct irdma_cm_node *cm_node = event->cm_node;
4197 struct iw_cm_id *cm_id = cm_node->cm_id;
4198 struct irdma_qp *iwqp;
4199
4200 if (!cm_id)
4201 return;
4202
4203 iwqp = cm_id->provider_data;
4204 if (!iwqp)
4205 return;
4206
4207 ibdev_dbg(&cm_node->iwdev->ibdev,
4208 "CM: reset event %p - cm_id = %p\n", event->cm_node, cm_id);
4209 iwqp->cm_id = NULL;
4210
4211 irdma_send_cm_event(cm_node, cm_node->cm_id, IW_CM_EVENT_DISCONNECT,
4212 -ECONNRESET);
4213 irdma_send_cm_event(cm_node, cm_node->cm_id, IW_CM_EVENT_CLOSE, 0);
4214 }
4215
4216 /**
4217 * irdma_cm_event_handler - send event to cm upper layer
4218 * @work: pointer of cm event info.
4219 */
irdma_cm_event_handler(struct work_struct * work)4220 static void irdma_cm_event_handler(struct work_struct *work)
4221 {
4222 struct irdma_cm_event *event = container_of(work, struct irdma_cm_event, event_work);
4223 struct irdma_cm_node *cm_node;
4224
4225 if (!event || !event->cm_node || !event->cm_node->cm_core)
4226 return;
4227
4228 cm_node = event->cm_node;
4229 trace_irdma_cm_event_handler(cm_node, event->type, NULL);
4230
4231 switch (event->type) {
4232 case IRDMA_CM_EVENT_MPA_REQ:
4233 irdma_send_cm_event(cm_node, cm_node->cm_id,
4234 IW_CM_EVENT_CONNECT_REQUEST, 0);
4235 break;
4236 case IRDMA_CM_EVENT_RESET:
4237 irdma_cm_event_reset(event);
4238 break;
4239 case IRDMA_CM_EVENT_CONNECTED:
4240 if (!event->cm_node->cm_id ||
4241 event->cm_node->state != IRDMA_CM_STATE_OFFLOADED)
4242 break;
4243 irdma_cm_event_connected(event);
4244 break;
4245 case IRDMA_CM_EVENT_MPA_REJECT:
4246 if (!event->cm_node->cm_id ||
4247 cm_node->state == IRDMA_CM_STATE_OFFLOADED)
4248 break;
4249 irdma_send_cm_event(cm_node, cm_node->cm_id,
4250 IW_CM_EVENT_CONNECT_REPLY, -ECONNREFUSED);
4251 break;
4252 case IRDMA_CM_EVENT_ABORTED:
4253 if (!event->cm_node->cm_id ||
4254 event->cm_node->state == IRDMA_CM_STATE_OFFLOADED)
4255 break;
4256 irdma_event_connect_error(event);
4257 break;
4258 default:
4259 ibdev_dbg(&cm_node->iwdev->ibdev,
4260 "CM: bad event type = %d\n", event->type);
4261 break;
4262 }
4263
4264 irdma_rem_ref_cm_node(event->cm_node);
4265 kfree(event);
4266 }
4267
4268 /**
4269 * irdma_cm_post_event - queue event request for worker thread
4270 * @event: cm node's info for up event call
4271 */
irdma_cm_post_event(struct irdma_cm_event * event)4272 static void irdma_cm_post_event(struct irdma_cm_event *event)
4273 {
4274 refcount_inc(&event->cm_node->refcnt);
4275 INIT_WORK(&event->event_work, irdma_cm_event_handler);
4276 queue_work(event->cm_node->cm_core->event_wq, &event->event_work);
4277 }
4278
4279 /**
4280 * irdma_cm_teardown_connections - teardown QPs
4281 * @iwdev: device pointer
4282 * @ipaddr: Pointer to IPv4 or IPv6 address
4283 * @nfo: Connection info
4284 * @disconnect_all: flag indicating disconnect all QPs
4285 *
4286 * teardown QPs where source or destination addr matches ip addr
4287 */
irdma_cm_teardown_connections(struct irdma_device * iwdev,u32 * ipaddr,struct irdma_cm_info * nfo,bool disconnect_all)4288 void irdma_cm_teardown_connections(struct irdma_device *iwdev, u32 *ipaddr,
4289 struct irdma_cm_info *nfo,
4290 bool disconnect_all)
4291 {
4292 struct irdma_cm_core *cm_core = &iwdev->cm_core;
4293 struct list_head *list_core_temp;
4294 struct list_head *list_node;
4295 struct irdma_cm_node *cm_node;
4296 struct list_head teardown_list;
4297 struct ib_qp_attr attr;
4298
4299 INIT_LIST_HEAD(&teardown_list);
4300
4301 rcu_read_lock();
4302 irdma_teardown_list_prep(cm_core, &teardown_list, ipaddr, nfo, disconnect_all);
4303 rcu_read_unlock();
4304
4305 list_for_each_safe (list_node, list_core_temp, &teardown_list) {
4306 cm_node = container_of(list_node, struct irdma_cm_node,
4307 teardown_entry);
4308 attr.qp_state = IB_QPS_ERR;
4309 irdma_modify_qp(&cm_node->iwqp->ibqp, &attr, IB_QP_STATE, NULL);
4310 if (iwdev->rf->reset)
4311 irdma_cm_disconn(cm_node->iwqp);
4312 irdma_rem_ref_cm_node(cm_node);
4313 }
4314 }
4315
4316 /**
4317 * irdma_qhash_ctrl - enable/disable qhash for list
4318 * @iwdev: device pointer
4319 * @parent_listen_node: parent listen node
4320 * @nfo: cm info node
4321 * @ipaddr: Pointer to IPv4 or IPv6 address
4322 * @ipv4: flag indicating IPv4 when true
4323 * @ifup: flag indicating interface up when true
4324 *
4325 * Enables or disables the qhash for the node in the child
4326 * listen list that matches ipaddr. If no matching IP was found
4327 * it will allocate and add a new child listen node to the
4328 * parent listen node. The listen_list_lock is assumed to be
4329 * held when called.
4330 */
irdma_qhash_ctrl(struct irdma_device * iwdev,struct irdma_cm_listener * parent_listen_node,struct irdma_cm_info * nfo,u32 * ipaddr,bool ipv4,bool ifup)4331 static void irdma_qhash_ctrl(struct irdma_device *iwdev,
4332 struct irdma_cm_listener *parent_listen_node,
4333 struct irdma_cm_info *nfo, u32 *ipaddr, bool ipv4,
4334 bool ifup)
4335 {
4336 struct list_head *child_listen_list = &parent_listen_node->child_listen_list;
4337 struct irdma_cm_listener *child_listen_node;
4338 struct list_head *pos, *tpos;
4339 bool node_allocated = false;
4340 enum irdma_quad_hash_manage_type op = ifup ?
4341 IRDMA_QHASH_MANAGE_TYPE_ADD :
4342 IRDMA_QHASH_MANAGE_TYPE_DELETE;
4343 int err;
4344
4345 list_for_each_safe (pos, tpos, child_listen_list) {
4346 child_listen_node = list_entry(pos, struct irdma_cm_listener,
4347 child_listen_list);
4348 if (!memcmp(child_listen_node->loc_addr, ipaddr, ipv4 ? 4 : 16))
4349 goto set_qhash;
4350 }
4351
4352 /* if not found then add a child listener if interface is going up */
4353 if (!ifup)
4354 return;
4355 child_listen_node = kmemdup(parent_listen_node,
4356 sizeof(*child_listen_node), GFP_ATOMIC);
4357 if (!child_listen_node)
4358 return;
4359
4360 node_allocated = true;
4361 memcpy(child_listen_node->loc_addr, ipaddr, ipv4 ? 4 : 16);
4362
4363 set_qhash:
4364 memcpy(nfo->loc_addr, child_listen_node->loc_addr,
4365 sizeof(nfo->loc_addr));
4366 nfo->vlan_id = child_listen_node->vlan_id;
4367 err = irdma_manage_qhash(iwdev, nfo, IRDMA_QHASH_TYPE_TCP_SYN, op, NULL,
4368 false);
4369 if (!err) {
4370 child_listen_node->qhash_set = ifup;
4371 if (node_allocated)
4372 list_add(&child_listen_node->child_listen_list,
4373 &parent_listen_node->child_listen_list);
4374 } else if (node_allocated) {
4375 kfree(child_listen_node);
4376 }
4377 }
4378
4379 /**
4380 * irdma_if_notify - process an ifdown on an interface
4381 * @iwdev: device pointer
4382 * @netdev: network device structure
4383 * @ipaddr: Pointer to IPv4 or IPv6 address
4384 * @ipv4: flag indicating IPv4 when true
4385 * @ifup: flag indicating interface up when true
4386 */
irdma_if_notify(struct irdma_device * iwdev,struct net_device * netdev,u32 * ipaddr,bool ipv4,bool ifup)4387 void irdma_if_notify(struct irdma_device *iwdev, struct net_device *netdev,
4388 u32 *ipaddr, bool ipv4, bool ifup)
4389 {
4390 struct irdma_cm_core *cm_core = &iwdev->cm_core;
4391 unsigned long flags;
4392 struct irdma_cm_listener *listen_node;
4393 static const u32 ip_zero[4] = { 0, 0, 0, 0 };
4394 struct irdma_cm_info nfo = {};
4395 u16 vlan_id = rdma_vlan_dev_vlan_id(netdev);
4396 enum irdma_quad_hash_manage_type op = ifup ?
4397 IRDMA_QHASH_MANAGE_TYPE_ADD :
4398 IRDMA_QHASH_MANAGE_TYPE_DELETE;
4399
4400 nfo.vlan_id = vlan_id;
4401 nfo.ipv4 = ipv4;
4402 nfo.qh_qpid = 1;
4403
4404 /* Disable or enable qhash for listeners */
4405 spin_lock_irqsave(&cm_core->listen_list_lock, flags);
4406 list_for_each_entry (listen_node, &cm_core->listen_list, list) {
4407 if (vlan_id != listen_node->vlan_id ||
4408 (memcmp(listen_node->loc_addr, ipaddr, ipv4 ? 4 : 16) &&
4409 memcmp(listen_node->loc_addr, ip_zero, ipv4 ? 4 : 16)))
4410 continue;
4411
4412 memcpy(nfo.loc_addr, listen_node->loc_addr,
4413 sizeof(nfo.loc_addr));
4414 nfo.loc_port = listen_node->loc_port;
4415 nfo.user_pri = listen_node->user_pri;
4416 if (!list_empty(&listen_node->child_listen_list)) {
4417 irdma_qhash_ctrl(iwdev, listen_node, &nfo, ipaddr, ipv4,
4418 ifup);
4419 } else if (memcmp(listen_node->loc_addr, ip_zero,
4420 ipv4 ? 4 : 16)) {
4421 if (!irdma_manage_qhash(iwdev, &nfo,
4422 IRDMA_QHASH_TYPE_TCP_SYN, op,
4423 NULL, false))
4424 listen_node->qhash_set = ifup;
4425 }
4426 }
4427 spin_unlock_irqrestore(&cm_core->listen_list_lock, flags);
4428
4429 /* disconnect any connected qp's on ifdown */
4430 if (!ifup)
4431 irdma_cm_teardown_connections(iwdev, ipaddr, &nfo, false);
4432 }
4433