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 = timer_container_of(cm_core, t,
1267 tcp_timer);
1268 struct irdma_sc_vsi *vsi;
1269 u32 settimer = 0;
1270 unsigned long timetosend;
1271 unsigned long flags;
1272 struct list_head timer_list;
1273
1274 INIT_LIST_HEAD(&timer_list);
1275
1276 rcu_read_lock();
1277 irdma_timer_list_prep(cm_core, &timer_list);
1278 rcu_read_unlock();
1279
1280 list_for_each_safe (list_node, list_core_temp, &timer_list) {
1281 cm_node = container_of(list_node, struct irdma_cm_node,
1282 timer_entry);
1283 close_entry = cm_node->close_entry;
1284
1285 if (close_entry) {
1286 if (time_after(close_entry->timetosend, jiffies)) {
1287 if (nexttimeout > close_entry->timetosend ||
1288 !settimer) {
1289 nexttimeout = close_entry->timetosend;
1290 settimer = 1;
1291 }
1292 } else {
1293 irdma_handle_close_entry(cm_node, 1);
1294 }
1295 }
1296
1297 spin_lock_irqsave(&cm_node->retrans_list_lock, flags);
1298
1299 send_entry = cm_node->send_entry;
1300 if (!send_entry)
1301 goto done;
1302 if (time_after(send_entry->timetosend, jiffies)) {
1303 if (cm_node->state != IRDMA_CM_STATE_OFFLOADED) {
1304 if (nexttimeout > send_entry->timetosend ||
1305 !settimer) {
1306 nexttimeout = send_entry->timetosend;
1307 settimer = 1;
1308 }
1309 } else {
1310 irdma_free_retrans_entry(cm_node);
1311 }
1312 goto done;
1313 }
1314
1315 if (cm_node->state == IRDMA_CM_STATE_OFFLOADED ||
1316 cm_node->state == IRDMA_CM_STATE_CLOSED) {
1317 irdma_free_retrans_entry(cm_node);
1318 goto done;
1319 }
1320
1321 if (!send_entry->retranscount || !send_entry->retrycount) {
1322 irdma_free_retrans_entry(cm_node);
1323
1324 spin_unlock_irqrestore(&cm_node->retrans_list_lock,
1325 flags);
1326 irdma_retrans_expired(cm_node);
1327 cm_node->state = IRDMA_CM_STATE_CLOSED;
1328 spin_lock_irqsave(&cm_node->retrans_list_lock, flags);
1329 goto done;
1330 }
1331 spin_unlock_irqrestore(&cm_node->retrans_list_lock, flags);
1332
1333 vsi = &cm_node->iwdev->vsi;
1334 if (!cm_node->ack_rcvd) {
1335 refcount_inc(&send_entry->sqbuf->refcount);
1336 irdma_puda_send_buf(vsi->ilq, send_entry->sqbuf);
1337 cm_node->cm_core->stats_pkt_retrans++;
1338 }
1339
1340 spin_lock_irqsave(&cm_node->retrans_list_lock, flags);
1341 if (send_entry->send_retrans) {
1342 send_entry->retranscount--;
1343 timetosend = (IRDMA_RETRY_TIMEOUT <<
1344 (IRDMA_DEFAULT_RETRANS -
1345 send_entry->retranscount));
1346
1347 send_entry->timetosend = jiffies +
1348 min(timetosend, IRDMA_MAX_TIMEOUT);
1349 if (nexttimeout > send_entry->timetosend || !settimer) {
1350 nexttimeout = send_entry->timetosend;
1351 settimer = 1;
1352 }
1353 } else {
1354 int close_when_complete;
1355
1356 close_when_complete = send_entry->close_when_complete;
1357 irdma_free_retrans_entry(cm_node);
1358 if (close_when_complete)
1359 irdma_rem_ref_cm_node(cm_node);
1360 }
1361 done:
1362 spin_unlock_irqrestore(&cm_node->retrans_list_lock, flags);
1363 irdma_rem_ref_cm_node(cm_node);
1364 }
1365
1366 if (settimer) {
1367 spin_lock_irqsave(&cm_core->ht_lock, flags);
1368 if (!timer_pending(&cm_core->tcp_timer)) {
1369 cm_core->tcp_timer.expires = nexttimeout;
1370 add_timer(&cm_core->tcp_timer);
1371 }
1372 spin_unlock_irqrestore(&cm_core->ht_lock, flags);
1373 }
1374 }
1375
1376 /**
1377 * irdma_send_syn - send SYN packet
1378 * @cm_node: connection's node
1379 * @sendack: flag to set ACK bit or not
1380 */
irdma_send_syn(struct irdma_cm_node * cm_node,u32 sendack)1381 int irdma_send_syn(struct irdma_cm_node *cm_node, u32 sendack)
1382 {
1383 struct irdma_puda_buf *sqbuf;
1384 int flags = SET_SYN;
1385 char optionsbuf[sizeof(struct option_mss) +
1386 sizeof(struct option_windowscale) +
1387 sizeof(struct option_base) + TCP_OPTIONS_PADDING];
1388 struct irdma_kmem_info opts;
1389 int optionssize = 0;
1390 /* Sending MSS option */
1391 union all_known_options *options;
1392
1393 opts.addr = optionsbuf;
1394 if (!cm_node)
1395 return -EINVAL;
1396
1397 options = (union all_known_options *)&optionsbuf[optionssize];
1398 options->mss.optionnum = OPTION_NUM_MSS;
1399 options->mss.len = sizeof(struct option_mss);
1400 options->mss.mss = htons(cm_node->tcp_cntxt.mss);
1401 optionssize += sizeof(struct option_mss);
1402
1403 options = (union all_known_options *)&optionsbuf[optionssize];
1404 options->windowscale.optionnum = OPTION_NUM_WINDOW_SCALE;
1405 options->windowscale.len = sizeof(struct option_windowscale);
1406 options->windowscale.shiftcount = cm_node->tcp_cntxt.rcv_wscale;
1407 optionssize += sizeof(struct option_windowscale);
1408 options = (union all_known_options *)&optionsbuf[optionssize];
1409 options->eol = OPTION_NUM_EOL;
1410 optionssize += 1;
1411
1412 if (sendack)
1413 flags |= SET_ACK;
1414
1415 opts.size = optionssize;
1416
1417 sqbuf = cm_node->cm_core->form_cm_frame(cm_node, &opts, NULL, NULL,
1418 flags);
1419 if (!sqbuf)
1420 return -ENOMEM;
1421
1422 return irdma_schedule_cm_timer(cm_node, sqbuf, IRDMA_TIMER_TYPE_SEND, 1,
1423 0);
1424 }
1425
1426 /**
1427 * irdma_send_ack - Send ACK packet
1428 * @cm_node: connection's node
1429 */
irdma_send_ack(struct irdma_cm_node * cm_node)1430 void irdma_send_ack(struct irdma_cm_node *cm_node)
1431 {
1432 struct irdma_puda_buf *sqbuf;
1433 struct irdma_sc_vsi *vsi = &cm_node->iwdev->vsi;
1434
1435 sqbuf = cm_node->cm_core->form_cm_frame(cm_node, NULL, NULL, NULL,
1436 SET_ACK);
1437 if (sqbuf)
1438 irdma_puda_send_buf(vsi->ilq, sqbuf);
1439 }
1440
1441 /**
1442 * irdma_send_fin - Send FIN pkt
1443 * @cm_node: connection's node
1444 */
irdma_send_fin(struct irdma_cm_node * cm_node)1445 static int irdma_send_fin(struct irdma_cm_node *cm_node)
1446 {
1447 struct irdma_puda_buf *sqbuf;
1448
1449 sqbuf = cm_node->cm_core->form_cm_frame(cm_node, NULL, NULL, NULL,
1450 SET_ACK | SET_FIN);
1451 if (!sqbuf)
1452 return -ENOMEM;
1453
1454 return irdma_schedule_cm_timer(cm_node, sqbuf, IRDMA_TIMER_TYPE_SEND, 1,
1455 0);
1456 }
1457
1458 /**
1459 * irdma_find_listener - find a cm node listening on this addr-port pair
1460 * @cm_core: cm's core
1461 * @dst_addr: listener ip addr
1462 * @ipv4: flag indicating IPv4 when true
1463 * @dst_port: listener tcp port num
1464 * @vlan_id: virtual LAN ID
1465 * @listener_state: state to match with listen node's
1466 */
1467 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)1468 irdma_find_listener(struct irdma_cm_core *cm_core, u32 *dst_addr, bool ipv4,
1469 u16 dst_port, u16 vlan_id,
1470 enum irdma_cm_listener_state listener_state)
1471 {
1472 struct irdma_cm_listener *listen_node;
1473 static const u32 ip_zero[4] = { 0, 0, 0, 0 };
1474 u32 listen_addr[4];
1475 u16 listen_port;
1476 unsigned long flags;
1477
1478 /* walk list and find cm_node associated with this session ID */
1479 spin_lock_irqsave(&cm_core->listen_list_lock, flags);
1480 list_for_each_entry (listen_node, &cm_core->listen_list, list) {
1481 memcpy(listen_addr, listen_node->loc_addr, sizeof(listen_addr));
1482 listen_port = listen_node->loc_port;
1483 if (listen_node->ipv4 != ipv4 || listen_port != dst_port ||
1484 !(listener_state & listen_node->listener_state))
1485 continue;
1486 /* compare node pair, return node handle if a match */
1487 if (!memcmp(listen_addr, ip_zero, sizeof(listen_addr)) ||
1488 (!memcmp(listen_addr, dst_addr, sizeof(listen_addr)) &&
1489 vlan_id == listen_node->vlan_id)) {
1490 refcount_inc(&listen_node->refcnt);
1491 spin_unlock_irqrestore(&cm_core->listen_list_lock,
1492 flags);
1493 trace_irdma_find_listener(listen_node);
1494 return listen_node;
1495 }
1496 }
1497 spin_unlock_irqrestore(&cm_core->listen_list_lock, flags);
1498
1499 return NULL;
1500 }
1501
1502 /**
1503 * irdma_del_multiple_qhash - Remove qhash and child listens
1504 * @iwdev: iWarp device
1505 * @cm_info: CM info for parent listen node
1506 * @cm_parent_listen_node: The parent listen node
1507 */
irdma_del_multiple_qhash(struct irdma_device * iwdev,struct irdma_cm_info * cm_info,struct irdma_cm_listener * cm_parent_listen_node)1508 static int irdma_del_multiple_qhash(struct irdma_device *iwdev,
1509 struct irdma_cm_info *cm_info,
1510 struct irdma_cm_listener *cm_parent_listen_node)
1511 {
1512 struct irdma_cm_listener *child_listen_node;
1513 struct list_head *pos, *tpos;
1514 unsigned long flags;
1515 int ret = -EINVAL;
1516
1517 spin_lock_irqsave(&iwdev->cm_core.listen_list_lock, flags);
1518 list_for_each_safe (pos, tpos,
1519 &cm_parent_listen_node->child_listen_list) {
1520 child_listen_node = list_entry(pos, struct irdma_cm_listener,
1521 child_listen_list);
1522 if (child_listen_node->ipv4)
1523 ibdev_dbg(&iwdev->ibdev,
1524 "CM: removing child listen for IP=%pI4, port=%d, vlan=%d\n",
1525 child_listen_node->loc_addr,
1526 child_listen_node->loc_port,
1527 child_listen_node->vlan_id);
1528 else
1529 ibdev_dbg(&iwdev->ibdev,
1530 "CM: removing child listen for IP=%pI6, port=%d, vlan=%d\n",
1531 child_listen_node->loc_addr,
1532 child_listen_node->loc_port,
1533 child_listen_node->vlan_id);
1534 trace_irdma_del_multiple_qhash(child_listen_node);
1535 list_del(pos);
1536 memcpy(cm_info->loc_addr, child_listen_node->loc_addr,
1537 sizeof(cm_info->loc_addr));
1538 cm_info->vlan_id = child_listen_node->vlan_id;
1539 if (child_listen_node->qhash_set) {
1540 ret = irdma_manage_qhash(iwdev, cm_info,
1541 IRDMA_QHASH_TYPE_TCP_SYN,
1542 IRDMA_QHASH_MANAGE_TYPE_DELETE,
1543 NULL, false);
1544 child_listen_node->qhash_set = false;
1545 } else {
1546 ret = 0;
1547 }
1548 ibdev_dbg(&iwdev->ibdev,
1549 "CM: Child listen node freed = %p\n",
1550 child_listen_node);
1551 kfree(child_listen_node);
1552 cm_parent_listen_node->cm_core->stats_listen_nodes_destroyed++;
1553 }
1554 spin_unlock_irqrestore(&iwdev->cm_core.listen_list_lock, flags);
1555
1556 return ret;
1557 }
1558
irdma_iw_get_vlan_prio(u32 * loc_addr,u8 prio,bool ipv4)1559 static u8 irdma_iw_get_vlan_prio(u32 *loc_addr, u8 prio, bool ipv4)
1560 {
1561 struct net_device *ndev = NULL;
1562
1563 rcu_read_lock();
1564 if (ipv4) {
1565 ndev = ip_dev_find(&init_net, htonl(loc_addr[0]));
1566 } else if (IS_ENABLED(CONFIG_IPV6)) {
1567 struct net_device *ip_dev;
1568 struct in6_addr laddr6;
1569
1570 irdma_copy_ip_htonl(laddr6.in6_u.u6_addr32, loc_addr);
1571
1572 for_each_netdev_rcu (&init_net, ip_dev) {
1573 if (ipv6_chk_addr(&init_net, &laddr6, ip_dev, 1)) {
1574 ndev = ip_dev;
1575 break;
1576 }
1577 }
1578 }
1579
1580 if (!ndev)
1581 goto done;
1582 if (is_vlan_dev(ndev))
1583 prio = (vlan_dev_get_egress_qos_mask(ndev, prio) & VLAN_PRIO_MASK)
1584 >> VLAN_PRIO_SHIFT;
1585 if (ipv4)
1586 dev_put(ndev);
1587
1588 done:
1589 rcu_read_unlock();
1590
1591 return prio;
1592 }
1593
1594 /**
1595 * irdma_get_vlan_mac_ipv6 - Gets the vlan and mac
1596 * @addr: local IPv6 address
1597 * @vlan_id: vlan id for the given IPv6 address
1598 * @mac: mac address for the given IPv6 address
1599 *
1600 * Returns the vlan id and mac for an IPv6 address.
1601 */
irdma_get_vlan_mac_ipv6(u32 * addr,u16 * vlan_id,u8 * mac)1602 void irdma_get_vlan_mac_ipv6(u32 *addr, u16 *vlan_id, u8 *mac)
1603 {
1604 struct net_device *ip_dev = NULL;
1605 struct in6_addr laddr6;
1606
1607 if (!IS_ENABLED(CONFIG_IPV6))
1608 return;
1609
1610 irdma_copy_ip_htonl(laddr6.in6_u.u6_addr32, addr);
1611 if (vlan_id)
1612 *vlan_id = 0xFFFF; /* Match rdma_vlan_dev_vlan_id() */
1613 if (mac)
1614 eth_zero_addr(mac);
1615
1616 rcu_read_lock();
1617 for_each_netdev_rcu (&init_net, ip_dev) {
1618 if (ipv6_chk_addr(&init_net, &laddr6, ip_dev, 1)) {
1619 if (vlan_id)
1620 *vlan_id = rdma_vlan_dev_vlan_id(ip_dev);
1621 if (ip_dev->dev_addr && mac)
1622 ether_addr_copy(mac, ip_dev->dev_addr);
1623 break;
1624 }
1625 }
1626 rcu_read_unlock();
1627 }
1628
1629 /**
1630 * irdma_get_vlan_ipv4 - Returns the vlan_id for IPv4 address
1631 * @addr: local IPv4 address
1632 */
irdma_get_vlan_ipv4(u32 * addr)1633 u16 irdma_get_vlan_ipv4(u32 *addr)
1634 {
1635 struct net_device *netdev;
1636 u16 vlan_id = 0xFFFF;
1637
1638 netdev = ip_dev_find(&init_net, htonl(addr[0]));
1639 if (netdev) {
1640 vlan_id = rdma_vlan_dev_vlan_id(netdev);
1641 dev_put(netdev);
1642 }
1643
1644 return vlan_id;
1645 }
1646
1647 /**
1648 * irdma_add_mqh_6 - Adds multiple qhashes for IPv6
1649 * @iwdev: iWarp device
1650 * @cm_info: CM info for parent listen node
1651 * @cm_parent_listen_node: The parent listen node
1652 *
1653 * Adds a qhash and a child listen node for every IPv6 address
1654 * on the adapter and adds the associated qhash filter
1655 */
irdma_add_mqh_6(struct irdma_device * iwdev,struct irdma_cm_info * cm_info,struct irdma_cm_listener * cm_parent_listen_node)1656 static int irdma_add_mqh_6(struct irdma_device *iwdev,
1657 struct irdma_cm_info *cm_info,
1658 struct irdma_cm_listener *cm_parent_listen_node)
1659 {
1660 struct net_device *ip_dev;
1661 struct inet6_dev *idev;
1662 struct inet6_ifaddr *ifp, *tmp;
1663 struct irdma_cm_listener *child_listen_node;
1664 unsigned long flags;
1665 int ret = 0;
1666
1667 rtnl_lock();
1668 for_each_netdev(&init_net, ip_dev) {
1669 if (!(ip_dev->flags & IFF_UP))
1670 continue;
1671
1672 if (((rdma_vlan_dev_vlan_id(ip_dev) >= VLAN_N_VID) ||
1673 (rdma_vlan_dev_real_dev(ip_dev) != iwdev->netdev)) &&
1674 ip_dev != iwdev->netdev)
1675 continue;
1676
1677 idev = __in6_dev_get(ip_dev);
1678 if (!idev) {
1679 ibdev_dbg(&iwdev->ibdev, "CM: idev == NULL\n");
1680 break;
1681 }
1682 list_for_each_entry_safe (ifp, tmp, &idev->addr_list, if_list) {
1683 ibdev_dbg(&iwdev->ibdev, "CM: IP=%pI6, vlan_id=%d, MAC=%pM\n",
1684 &ifp->addr, rdma_vlan_dev_vlan_id(ip_dev),
1685 ip_dev->dev_addr);
1686 child_listen_node = kzalloc(sizeof(*child_listen_node), GFP_KERNEL);
1687 ibdev_dbg(&iwdev->ibdev, "CM: Allocating child listener %p\n",
1688 child_listen_node);
1689 if (!child_listen_node) {
1690 ibdev_dbg(&iwdev->ibdev, "CM: listener memory allocation\n");
1691 ret = -ENOMEM;
1692 goto exit;
1693 }
1694
1695 cm_info->vlan_id = rdma_vlan_dev_vlan_id(ip_dev);
1696 cm_parent_listen_node->vlan_id = cm_info->vlan_id;
1697 memcpy(child_listen_node, cm_parent_listen_node,
1698 sizeof(*child_listen_node));
1699 irdma_copy_ip_ntohl(child_listen_node->loc_addr,
1700 ifp->addr.in6_u.u6_addr32);
1701 memcpy(cm_info->loc_addr, child_listen_node->loc_addr,
1702 sizeof(cm_info->loc_addr));
1703 if (!iwdev->vsi.dscp_mode)
1704 cm_info->user_pri =
1705 irdma_iw_get_vlan_prio(child_listen_node->loc_addr,
1706 cm_info->user_pri,
1707 false);
1708
1709 ret = irdma_manage_qhash(iwdev, cm_info,
1710 IRDMA_QHASH_TYPE_TCP_SYN,
1711 IRDMA_QHASH_MANAGE_TYPE_ADD,
1712 NULL, true);
1713 if (ret) {
1714 kfree(child_listen_node);
1715 continue;
1716 }
1717
1718 trace_irdma_add_mqh_6(iwdev, child_listen_node,
1719 ip_dev->dev_addr);
1720
1721 child_listen_node->qhash_set = true;
1722 spin_lock_irqsave(&iwdev->cm_core.listen_list_lock, flags);
1723 list_add(&child_listen_node->child_listen_list,
1724 &cm_parent_listen_node->child_listen_list);
1725 spin_unlock_irqrestore(&iwdev->cm_core.listen_list_lock, flags);
1726 cm_parent_listen_node->cm_core->stats_listen_nodes_created++;
1727 }
1728 }
1729 exit:
1730 rtnl_unlock();
1731
1732 return ret;
1733 }
1734
1735 /**
1736 * irdma_add_mqh_4 - Adds multiple qhashes for IPv4
1737 * @iwdev: iWarp device
1738 * @cm_info: CM info for parent listen node
1739 * @cm_parent_listen_node: The parent listen node
1740 *
1741 * Adds a qhash and a child listen node for every IPv4 address
1742 * on the adapter and adds the associated qhash filter
1743 */
irdma_add_mqh_4(struct irdma_device * iwdev,struct irdma_cm_info * cm_info,struct irdma_cm_listener * cm_parent_listen_node)1744 static int irdma_add_mqh_4(struct irdma_device *iwdev,
1745 struct irdma_cm_info *cm_info,
1746 struct irdma_cm_listener *cm_parent_listen_node)
1747 {
1748 struct net_device *ip_dev;
1749 struct in_device *idev;
1750 struct irdma_cm_listener *child_listen_node;
1751 unsigned long flags;
1752 const struct in_ifaddr *ifa;
1753 int ret = 0;
1754
1755 rtnl_lock();
1756 for_each_netdev(&init_net, ip_dev) {
1757 if (!(ip_dev->flags & IFF_UP))
1758 continue;
1759
1760 if (((rdma_vlan_dev_vlan_id(ip_dev) >= VLAN_N_VID) ||
1761 (rdma_vlan_dev_real_dev(ip_dev) != iwdev->netdev)) &&
1762 ip_dev != iwdev->netdev)
1763 continue;
1764
1765 idev = in_dev_get(ip_dev);
1766 if (!idev)
1767 continue;
1768
1769 in_dev_for_each_ifa_rtnl(ifa, idev) {
1770 ibdev_dbg(&iwdev->ibdev,
1771 "CM: Allocating child CM Listener forIP=%pI4, vlan_id=%d, MAC=%pM\n",
1772 &ifa->ifa_address, rdma_vlan_dev_vlan_id(ip_dev),
1773 ip_dev->dev_addr);
1774 child_listen_node = kzalloc(sizeof(*child_listen_node), GFP_KERNEL);
1775 cm_parent_listen_node->cm_core->stats_listen_nodes_created++;
1776 ibdev_dbg(&iwdev->ibdev, "CM: Allocating child listener %p\n",
1777 child_listen_node);
1778 if (!child_listen_node) {
1779 ibdev_dbg(&iwdev->ibdev, "CM: listener memory allocation\n");
1780 in_dev_put(idev);
1781 ret = -ENOMEM;
1782 goto exit;
1783 }
1784
1785 cm_info->vlan_id = rdma_vlan_dev_vlan_id(ip_dev);
1786 cm_parent_listen_node->vlan_id = cm_info->vlan_id;
1787 memcpy(child_listen_node, cm_parent_listen_node,
1788 sizeof(*child_listen_node));
1789 child_listen_node->loc_addr[0] =
1790 ntohl(ifa->ifa_address);
1791 memcpy(cm_info->loc_addr, child_listen_node->loc_addr,
1792 sizeof(cm_info->loc_addr));
1793 if (!iwdev->vsi.dscp_mode)
1794 cm_info->user_pri =
1795 irdma_iw_get_vlan_prio(child_listen_node->loc_addr,
1796 cm_info->user_pri,
1797 true);
1798 ret = irdma_manage_qhash(iwdev, cm_info,
1799 IRDMA_QHASH_TYPE_TCP_SYN,
1800 IRDMA_QHASH_MANAGE_TYPE_ADD,
1801 NULL, true);
1802 if (ret) {
1803 kfree(child_listen_node);
1804 cm_parent_listen_node->cm_core
1805 ->stats_listen_nodes_created--;
1806 continue;
1807 }
1808
1809 trace_irdma_add_mqh_4(iwdev, child_listen_node,
1810 ip_dev->dev_addr);
1811
1812 child_listen_node->qhash_set = true;
1813 spin_lock_irqsave(&iwdev->cm_core.listen_list_lock,
1814 flags);
1815 list_add(&child_listen_node->child_listen_list,
1816 &cm_parent_listen_node->child_listen_list);
1817 spin_unlock_irqrestore(&iwdev->cm_core.listen_list_lock, flags);
1818 }
1819 in_dev_put(idev);
1820 }
1821 exit:
1822 rtnl_unlock();
1823
1824 return ret;
1825 }
1826
1827 /**
1828 * irdma_add_mqh - Adds multiple qhashes
1829 * @iwdev: iWarp device
1830 * @cm_info: CM info for parent listen node
1831 * @cm_listen_node: The parent listen node
1832 */
irdma_add_mqh(struct irdma_device * iwdev,struct irdma_cm_info * cm_info,struct irdma_cm_listener * cm_listen_node)1833 static int irdma_add_mqh(struct irdma_device *iwdev,
1834 struct irdma_cm_info *cm_info,
1835 struct irdma_cm_listener *cm_listen_node)
1836 {
1837 if (cm_info->ipv4)
1838 return irdma_add_mqh_4(iwdev, cm_info, cm_listen_node);
1839 else
1840 return irdma_add_mqh_6(iwdev, cm_info, cm_listen_node);
1841 }
1842
1843 /**
1844 * irdma_reset_list_prep - add connection nodes slated for reset to list
1845 * @cm_core: cm's core
1846 * @listener: pointer to listener node
1847 * @reset_list: a list to which cm_node will be selected
1848 */
irdma_reset_list_prep(struct irdma_cm_core * cm_core,struct irdma_cm_listener * listener,struct list_head * reset_list)1849 static void irdma_reset_list_prep(struct irdma_cm_core *cm_core,
1850 struct irdma_cm_listener *listener,
1851 struct list_head *reset_list)
1852 {
1853 struct irdma_cm_node *cm_node;
1854 int bkt;
1855
1856 hash_for_each_rcu(cm_core->cm_hash_tbl, bkt, cm_node, list) {
1857 if (cm_node->listener == listener &&
1858 !cm_node->accelerated &&
1859 refcount_inc_not_zero(&cm_node->refcnt))
1860 list_add(&cm_node->reset_entry, reset_list);
1861 }
1862 }
1863
1864 /**
1865 * irdma_dec_refcnt_listen - delete listener and associated cm nodes
1866 * @cm_core: cm's core
1867 * @listener: pointer to listener node
1868 * @free_hanging_nodes: to free associated cm_nodes
1869 * @apbvt_del: flag to delete the apbvt
1870 */
irdma_dec_refcnt_listen(struct irdma_cm_core * cm_core,struct irdma_cm_listener * listener,int free_hanging_nodes,bool apbvt_del)1871 static int irdma_dec_refcnt_listen(struct irdma_cm_core *cm_core,
1872 struct irdma_cm_listener *listener,
1873 int free_hanging_nodes, bool apbvt_del)
1874 {
1875 int err;
1876 struct list_head *list_pos;
1877 struct list_head *list_temp;
1878 struct irdma_cm_node *cm_node;
1879 struct list_head reset_list;
1880 struct irdma_cm_info nfo;
1881 enum irdma_cm_node_state old_state;
1882 unsigned long flags;
1883
1884 trace_irdma_dec_refcnt_listen(listener, __builtin_return_address(0));
1885 /* free non-accelerated child nodes for this listener */
1886 INIT_LIST_HEAD(&reset_list);
1887 if (free_hanging_nodes) {
1888 rcu_read_lock();
1889 irdma_reset_list_prep(cm_core, listener, &reset_list);
1890 rcu_read_unlock();
1891 }
1892
1893 list_for_each_safe (list_pos, list_temp, &reset_list) {
1894 cm_node = container_of(list_pos, struct irdma_cm_node,
1895 reset_entry);
1896 if (cm_node->state >= IRDMA_CM_STATE_FIN_WAIT1) {
1897 irdma_rem_ref_cm_node(cm_node);
1898 continue;
1899 }
1900
1901 irdma_cleanup_retrans_entry(cm_node);
1902 err = irdma_send_reset(cm_node);
1903 if (err) {
1904 cm_node->state = IRDMA_CM_STATE_CLOSED;
1905 ibdev_dbg(&cm_node->iwdev->ibdev,
1906 "CM: send reset failed\n");
1907 } else {
1908 old_state = cm_node->state;
1909 cm_node->state = IRDMA_CM_STATE_LISTENER_DESTROYED;
1910 if (old_state != IRDMA_CM_STATE_MPAREQ_RCVD)
1911 irdma_rem_ref_cm_node(cm_node);
1912 }
1913 }
1914
1915 if (refcount_dec_and_test(&listener->refcnt)) {
1916 spin_lock_irqsave(&cm_core->listen_list_lock, flags);
1917 list_del(&listener->list);
1918 spin_unlock_irqrestore(&cm_core->listen_list_lock, flags);
1919
1920 if (apbvt_del)
1921 irdma_del_apbvt(listener->iwdev,
1922 listener->apbvt_entry);
1923 memcpy(nfo.loc_addr, listener->loc_addr, sizeof(nfo.loc_addr));
1924 nfo.loc_port = listener->loc_port;
1925 nfo.ipv4 = listener->ipv4;
1926 nfo.vlan_id = listener->vlan_id;
1927 nfo.user_pri = listener->user_pri;
1928 nfo.qh_qpid = listener->iwdev->vsi.ilq->qp_id;
1929
1930 if (!list_empty(&listener->child_listen_list)) {
1931 irdma_del_multiple_qhash(listener->iwdev, &nfo,
1932 listener);
1933 } else {
1934 if (listener->qhash_set)
1935 irdma_manage_qhash(listener->iwdev,
1936 &nfo,
1937 IRDMA_QHASH_TYPE_TCP_SYN,
1938 IRDMA_QHASH_MANAGE_TYPE_DELETE,
1939 NULL, false);
1940 }
1941
1942 cm_core->stats_listen_destroyed++;
1943 cm_core->stats_listen_nodes_destroyed++;
1944 ibdev_dbg(&listener->iwdev->ibdev,
1945 "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",
1946 listener->loc_port, listener->loc_addr, listener,
1947 listener->cm_id, listener->qhash_set,
1948 listener->vlan_id, apbvt_del);
1949 kfree(listener);
1950 listener = NULL;
1951 return 0;
1952 }
1953
1954 return -EINVAL;
1955 }
1956
1957 /**
1958 * irdma_cm_del_listen - delete a listener
1959 * @cm_core: cm's core
1960 * @listener: passive connection's listener
1961 * @apbvt_del: flag to delete apbvt
1962 */
irdma_cm_del_listen(struct irdma_cm_core * cm_core,struct irdma_cm_listener * listener,bool apbvt_del)1963 static int irdma_cm_del_listen(struct irdma_cm_core *cm_core,
1964 struct irdma_cm_listener *listener,
1965 bool apbvt_del)
1966 {
1967 listener->listener_state = IRDMA_CM_LISTENER_PASSIVE_STATE;
1968 listener->cm_id = NULL;
1969
1970 return irdma_dec_refcnt_listen(cm_core, listener, 1, apbvt_del);
1971 }
1972
1973 /**
1974 * irdma_addr_resolve_neigh - resolve neighbor address
1975 * @iwdev: iwarp device structure
1976 * @src_ip: local ip address
1977 * @dst_ip: remote ip address
1978 * @arpindex: if there is an arp entry
1979 */
irdma_addr_resolve_neigh(struct irdma_device * iwdev,u32 src_ip,u32 dst_ip,int arpindex)1980 static int irdma_addr_resolve_neigh(struct irdma_device *iwdev, u32 src_ip,
1981 u32 dst_ip, int arpindex)
1982 {
1983 struct rtable *rt;
1984 struct neighbour *neigh;
1985 int rc = arpindex;
1986 __be32 dst_ipaddr = htonl(dst_ip);
1987 __be32 src_ipaddr = htonl(src_ip);
1988
1989 rt = ip_route_output(&init_net, dst_ipaddr, src_ipaddr, 0, 0,
1990 RT_SCOPE_UNIVERSE);
1991 if (IS_ERR(rt)) {
1992 ibdev_dbg(&iwdev->ibdev, "CM: ip_route_output fail\n");
1993 return -EINVAL;
1994 }
1995
1996 neigh = dst_neigh_lookup(&rt->dst, &dst_ipaddr);
1997 if (!neigh)
1998 goto exit;
1999
2000 if (neigh->nud_state & NUD_VALID)
2001 rc = irdma_add_arp(iwdev->rf, &dst_ip, true, neigh->ha);
2002 else
2003 neigh_event_send(neigh, NULL);
2004 if (neigh)
2005 neigh_release(neigh);
2006 exit:
2007 ip_rt_put(rt);
2008
2009 return rc;
2010 }
2011
2012 /**
2013 * irdma_get_dst_ipv6 - get destination cache entry via ipv6 lookup
2014 * @src_addr: local ipv6 sock address
2015 * @dst_addr: destination ipv6 sock address
2016 */
irdma_get_dst_ipv6(struct sockaddr_in6 * src_addr,struct sockaddr_in6 * dst_addr)2017 static struct dst_entry *irdma_get_dst_ipv6(struct sockaddr_in6 *src_addr,
2018 struct sockaddr_in6 *dst_addr)
2019 {
2020 struct dst_entry *dst = NULL;
2021
2022 if ((IS_ENABLED(CONFIG_IPV6))) {
2023 struct flowi6 fl6 = {};
2024
2025 fl6.daddr = dst_addr->sin6_addr;
2026 fl6.saddr = src_addr->sin6_addr;
2027 if (ipv6_addr_type(&fl6.daddr) & IPV6_ADDR_LINKLOCAL)
2028 fl6.flowi6_oif = dst_addr->sin6_scope_id;
2029
2030 dst = ip6_route_output(&init_net, NULL, &fl6);
2031 }
2032
2033 return dst;
2034 }
2035
2036 /**
2037 * irdma_addr_resolve_neigh_ipv6 - resolve neighbor ipv6 address
2038 * @iwdev: iwarp device structure
2039 * @src: local ip address
2040 * @dest: remote ip address
2041 * @arpindex: if there is an arp entry
2042 */
irdma_addr_resolve_neigh_ipv6(struct irdma_device * iwdev,u32 * src,u32 * dest,int arpindex)2043 static int irdma_addr_resolve_neigh_ipv6(struct irdma_device *iwdev, u32 *src,
2044 u32 *dest, int arpindex)
2045 {
2046 struct neighbour *neigh;
2047 int rc = arpindex;
2048 struct dst_entry *dst;
2049 struct sockaddr_in6 dst_addr = {};
2050 struct sockaddr_in6 src_addr = {};
2051
2052 dst_addr.sin6_family = AF_INET6;
2053 irdma_copy_ip_htonl(dst_addr.sin6_addr.in6_u.u6_addr32, dest);
2054 src_addr.sin6_family = AF_INET6;
2055 irdma_copy_ip_htonl(src_addr.sin6_addr.in6_u.u6_addr32, src);
2056 dst = irdma_get_dst_ipv6(&src_addr, &dst_addr);
2057 if (!dst || dst->error) {
2058 if (dst) {
2059 dst_release(dst);
2060 ibdev_dbg(&iwdev->ibdev,
2061 "CM: ip6_route_output returned dst->error = %d\n",
2062 dst->error);
2063 }
2064 return -EINVAL;
2065 }
2066
2067 neigh = dst_neigh_lookup(dst, dst_addr.sin6_addr.in6_u.u6_addr32);
2068 if (!neigh)
2069 goto exit;
2070
2071 ibdev_dbg(&iwdev->ibdev, "CM: dst_neigh_lookup MAC=%pM\n",
2072 neigh->ha);
2073
2074 trace_irdma_addr_resolve(iwdev, neigh->ha);
2075
2076 if (neigh->nud_state & NUD_VALID)
2077 rc = irdma_add_arp(iwdev->rf, dest, false, neigh->ha);
2078 else
2079 neigh_event_send(neigh, NULL);
2080 if (neigh)
2081 neigh_release(neigh);
2082 exit:
2083 dst_release(dst);
2084
2085 return rc;
2086 }
2087
2088 /**
2089 * irdma_find_node - find a cm node that matches the reference cm node
2090 * @cm_core: cm's core
2091 * @rem_port: remote tcp port num
2092 * @rem_addr: remote ip addr
2093 * @loc_port: local tcp port num
2094 * @loc_addr: local ip addr
2095 * @vlan_id: local VLAN ID
2096 */
irdma_find_node(struct irdma_cm_core * cm_core,u16 rem_port,u32 * rem_addr,u16 loc_port,u32 * loc_addr,u16 vlan_id)2097 struct irdma_cm_node *irdma_find_node(struct irdma_cm_core *cm_core,
2098 u16 rem_port, u32 *rem_addr, u16 loc_port,
2099 u32 *loc_addr, u16 vlan_id)
2100 {
2101 struct irdma_cm_node *cm_node;
2102 u32 key = (rem_port << 16) | loc_port;
2103
2104 rcu_read_lock();
2105 hash_for_each_possible_rcu(cm_core->cm_hash_tbl, cm_node, list, key) {
2106 if (cm_node->vlan_id == vlan_id &&
2107 cm_node->loc_port == loc_port && cm_node->rem_port == rem_port &&
2108 !memcmp(cm_node->loc_addr, loc_addr, sizeof(cm_node->loc_addr)) &&
2109 !memcmp(cm_node->rem_addr, rem_addr, sizeof(cm_node->rem_addr))) {
2110 if (!refcount_inc_not_zero(&cm_node->refcnt))
2111 goto exit;
2112 rcu_read_unlock();
2113 trace_irdma_find_node(cm_node, 0, NULL);
2114 return cm_node;
2115 }
2116 }
2117
2118 exit:
2119 rcu_read_unlock();
2120
2121 /* no owner node */
2122 return NULL;
2123 }
2124
2125 /**
2126 * irdma_add_hte_node - add a cm node to the hash table
2127 * @cm_core: cm's core
2128 * @cm_node: connection's node
2129 */
irdma_add_hte_node(struct irdma_cm_core * cm_core,struct irdma_cm_node * cm_node)2130 static void irdma_add_hte_node(struct irdma_cm_core *cm_core,
2131 struct irdma_cm_node *cm_node)
2132 {
2133 unsigned long flags;
2134 u32 key = (cm_node->rem_port << 16) | cm_node->loc_port;
2135
2136 spin_lock_irqsave(&cm_core->ht_lock, flags);
2137 hash_add_rcu(cm_core->cm_hash_tbl, &cm_node->list, key);
2138 spin_unlock_irqrestore(&cm_core->ht_lock, flags);
2139 }
2140
2141 /**
2142 * irdma_ipv4_is_lpb - check if loopback
2143 * @loc_addr: local addr to compare
2144 * @rem_addr: remote address
2145 */
irdma_ipv4_is_lpb(u32 loc_addr,u32 rem_addr)2146 bool irdma_ipv4_is_lpb(u32 loc_addr, u32 rem_addr)
2147 {
2148 return ipv4_is_loopback(htonl(rem_addr)) || (loc_addr == rem_addr);
2149 }
2150
2151 /**
2152 * irdma_ipv6_is_lpb - check if loopback
2153 * @loc_addr: local addr to compare
2154 * @rem_addr: remote address
2155 */
irdma_ipv6_is_lpb(u32 * loc_addr,u32 * rem_addr)2156 bool irdma_ipv6_is_lpb(u32 *loc_addr, u32 *rem_addr)
2157 {
2158 struct in6_addr raddr6;
2159
2160 irdma_copy_ip_htonl(raddr6.in6_u.u6_addr32, rem_addr);
2161
2162 return !memcmp(loc_addr, rem_addr, 16) || ipv6_addr_loopback(&raddr6);
2163 }
2164
2165 /**
2166 * irdma_cm_create_ah - create a cm address handle
2167 * @cm_node: The connection manager node to create AH for
2168 * @wait: Provides option to wait for ah creation or not
2169 */
irdma_cm_create_ah(struct irdma_cm_node * cm_node,bool wait)2170 static int irdma_cm_create_ah(struct irdma_cm_node *cm_node, bool wait)
2171 {
2172 struct irdma_ah_info ah_info = {};
2173 struct irdma_device *iwdev = cm_node->iwdev;
2174
2175 ether_addr_copy(ah_info.mac_addr, iwdev->netdev->dev_addr);
2176
2177 ah_info.hop_ttl = 0x40;
2178 ah_info.tc_tos = cm_node->tos;
2179 ah_info.vsi = &iwdev->vsi;
2180
2181 if (cm_node->ipv4) {
2182 ah_info.ipv4_valid = true;
2183 ah_info.dest_ip_addr[0] = cm_node->rem_addr[0];
2184 ah_info.src_ip_addr[0] = cm_node->loc_addr[0];
2185 ah_info.do_lpbk = irdma_ipv4_is_lpb(ah_info.src_ip_addr[0],
2186 ah_info.dest_ip_addr[0]);
2187 } else {
2188 memcpy(ah_info.dest_ip_addr, cm_node->rem_addr,
2189 sizeof(ah_info.dest_ip_addr));
2190 memcpy(ah_info.src_ip_addr, cm_node->loc_addr,
2191 sizeof(ah_info.src_ip_addr));
2192 ah_info.do_lpbk = irdma_ipv6_is_lpb(ah_info.src_ip_addr,
2193 ah_info.dest_ip_addr);
2194 }
2195
2196 ah_info.vlan_tag = cm_node->vlan_id;
2197 if (cm_node->vlan_id < VLAN_N_VID) {
2198 ah_info.insert_vlan_tag = 1;
2199 ah_info.vlan_tag |= cm_node->user_pri << VLAN_PRIO_SHIFT;
2200 }
2201
2202 ah_info.dst_arpindex =
2203 irdma_arp_table(iwdev->rf, ah_info.dest_ip_addr,
2204 ah_info.ipv4_valid, NULL, IRDMA_ARP_RESOLVE);
2205
2206 if (irdma_puda_create_ah(&iwdev->rf->sc_dev, &ah_info, wait,
2207 IRDMA_PUDA_RSRC_TYPE_ILQ, cm_node,
2208 &cm_node->ah))
2209 return -ENOMEM;
2210
2211 trace_irdma_create_ah(cm_node);
2212 return 0;
2213 }
2214
2215 /**
2216 * irdma_cm_free_ah - free a cm address handle
2217 * @cm_node: The connection manager node to create AH for
2218 */
irdma_cm_free_ah(struct irdma_cm_node * cm_node)2219 static void irdma_cm_free_ah(struct irdma_cm_node *cm_node)
2220 {
2221 struct irdma_device *iwdev = cm_node->iwdev;
2222
2223 trace_irdma_cm_free_ah(cm_node);
2224 irdma_puda_free_ah(&iwdev->rf->sc_dev, cm_node->ah);
2225 cm_node->ah = NULL;
2226 }
2227
2228 /**
2229 * irdma_make_cm_node - create a new instance of a cm node
2230 * @cm_core: cm's core
2231 * @iwdev: iwarp device structure
2232 * @cm_info: quad info for connection
2233 * @listener: passive connection's listener
2234 */
2235 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)2236 irdma_make_cm_node(struct irdma_cm_core *cm_core, struct irdma_device *iwdev,
2237 struct irdma_cm_info *cm_info,
2238 struct irdma_cm_listener *listener)
2239 {
2240 struct irdma_cm_node *cm_node;
2241 int oldarpindex;
2242 int arpindex;
2243 struct net_device *netdev = iwdev->netdev;
2244
2245 /* create an hte and cm_node for this instance */
2246 cm_node = kzalloc(sizeof(*cm_node), GFP_ATOMIC);
2247 if (!cm_node)
2248 return NULL;
2249
2250 /* set our node specific transport info */
2251 cm_node->ipv4 = cm_info->ipv4;
2252 cm_node->vlan_id = cm_info->vlan_id;
2253 if (cm_node->vlan_id >= VLAN_N_VID && iwdev->dcb_vlan_mode)
2254 cm_node->vlan_id = 0;
2255 cm_node->tos = cm_info->tos;
2256 cm_node->user_pri = cm_info->user_pri;
2257 if (listener) {
2258 if (listener->tos != cm_info->tos)
2259 ibdev_warn(&iwdev->ibdev,
2260 "application TOS[%d] and remote client TOS[%d] mismatch\n",
2261 listener->tos, cm_info->tos);
2262 if (iwdev->vsi.dscp_mode) {
2263 cm_node->user_pri = listener->user_pri;
2264 } else {
2265 cm_node->tos = max(listener->tos, cm_info->tos);
2266 cm_node->user_pri = rt_tos2priority(cm_node->tos);
2267 cm_node->user_pri =
2268 irdma_iw_get_vlan_prio(cm_info->loc_addr,
2269 cm_node->user_pri,
2270 cm_info->ipv4);
2271 }
2272 ibdev_dbg(&iwdev->ibdev,
2273 "DCB: listener: TOS:[%d] UP:[%d]\n", cm_node->tos,
2274 cm_node->user_pri);
2275 trace_irdma_listener_tos(iwdev, cm_node->tos,
2276 cm_node->user_pri);
2277 }
2278 memcpy(cm_node->loc_addr, cm_info->loc_addr, sizeof(cm_node->loc_addr));
2279 memcpy(cm_node->rem_addr, cm_info->rem_addr, sizeof(cm_node->rem_addr));
2280 cm_node->loc_port = cm_info->loc_port;
2281 cm_node->rem_port = cm_info->rem_port;
2282
2283 cm_node->mpa_frame_rev = IRDMA_CM_DEFAULT_MPA_VER;
2284 cm_node->send_rdma0_op = SEND_RDMA_READ_ZERO;
2285 cm_node->iwdev = iwdev;
2286 cm_node->dev = &iwdev->rf->sc_dev;
2287
2288 cm_node->ird_size = cm_node->dev->hw_attrs.max_hw_ird;
2289 cm_node->ord_size = cm_node->dev->hw_attrs.max_hw_ord;
2290
2291 cm_node->listener = listener;
2292 cm_node->cm_id = cm_info->cm_id;
2293 ether_addr_copy(cm_node->loc_mac, netdev->dev_addr);
2294 spin_lock_init(&cm_node->retrans_list_lock);
2295 cm_node->ack_rcvd = false;
2296
2297 init_completion(&cm_node->establish_comp);
2298 refcount_set(&cm_node->refcnt, 1);
2299 /* associate our parent CM core */
2300 cm_node->cm_core = cm_core;
2301 cm_node->tcp_cntxt.loc_id = IRDMA_CM_DEFAULT_LOCAL_ID;
2302 cm_node->tcp_cntxt.rcv_wscale = iwdev->rcv_wscale;
2303 cm_node->tcp_cntxt.rcv_wnd = iwdev->rcv_wnd >> cm_node->tcp_cntxt.rcv_wscale;
2304 if (cm_node->ipv4) {
2305 cm_node->tcp_cntxt.loc_seq_num = secure_tcp_seq(htonl(cm_node->loc_addr[0]),
2306 htonl(cm_node->rem_addr[0]),
2307 htons(cm_node->loc_port),
2308 htons(cm_node->rem_port));
2309 cm_node->tcp_cntxt.mss = iwdev->vsi.mtu - IRDMA_MTU_TO_MSS_IPV4;
2310 } else if (IS_ENABLED(CONFIG_IPV6)) {
2311 __be32 loc[4] = {
2312 htonl(cm_node->loc_addr[0]), htonl(cm_node->loc_addr[1]),
2313 htonl(cm_node->loc_addr[2]), htonl(cm_node->loc_addr[3])
2314 };
2315 __be32 rem[4] = {
2316 htonl(cm_node->rem_addr[0]), htonl(cm_node->rem_addr[1]),
2317 htonl(cm_node->rem_addr[2]), htonl(cm_node->rem_addr[3])
2318 };
2319 cm_node->tcp_cntxt.loc_seq_num = secure_tcpv6_seq(loc, rem,
2320 htons(cm_node->loc_port),
2321 htons(cm_node->rem_port));
2322 cm_node->tcp_cntxt.mss = iwdev->vsi.mtu - IRDMA_MTU_TO_MSS_IPV6;
2323 }
2324
2325 if ((cm_node->ipv4 &&
2326 irdma_ipv4_is_lpb(cm_node->loc_addr[0], cm_node->rem_addr[0])) ||
2327 (!cm_node->ipv4 &&
2328 irdma_ipv6_is_lpb(cm_node->loc_addr, cm_node->rem_addr))) {
2329 cm_node->do_lpb = true;
2330 arpindex = irdma_arp_table(iwdev->rf, cm_node->rem_addr,
2331 cm_node->ipv4, NULL,
2332 IRDMA_ARP_RESOLVE);
2333 } else {
2334 oldarpindex = irdma_arp_table(iwdev->rf, cm_node->rem_addr,
2335 cm_node->ipv4, NULL,
2336 IRDMA_ARP_RESOLVE);
2337 if (cm_node->ipv4)
2338 arpindex = irdma_addr_resolve_neigh(iwdev,
2339 cm_info->loc_addr[0],
2340 cm_info->rem_addr[0],
2341 oldarpindex);
2342 else if (IS_ENABLED(CONFIG_IPV6))
2343 arpindex = irdma_addr_resolve_neigh_ipv6(iwdev,
2344 cm_info->loc_addr,
2345 cm_info->rem_addr,
2346 oldarpindex);
2347 else
2348 arpindex = -EINVAL;
2349 }
2350
2351 if (arpindex < 0)
2352 goto err;
2353
2354 ether_addr_copy(cm_node->rem_mac,
2355 iwdev->rf->arp_table[arpindex].mac_addr);
2356 irdma_add_hte_node(cm_core, cm_node);
2357 cm_core->stats_nodes_created++;
2358 return cm_node;
2359
2360 err:
2361 kfree(cm_node);
2362
2363 return NULL;
2364 }
2365
irdma_destroy_connection(struct irdma_cm_node * cm_node)2366 static void irdma_destroy_connection(struct irdma_cm_node *cm_node)
2367 {
2368 struct irdma_cm_core *cm_core = cm_node->cm_core;
2369 struct irdma_qp *iwqp;
2370 struct irdma_cm_info nfo;
2371
2372 /* if the node is destroyed before connection was accelerated */
2373 if (!cm_node->accelerated && cm_node->accept_pend) {
2374 ibdev_dbg(&cm_node->iwdev->ibdev,
2375 "CM: node destroyed before established\n");
2376 atomic_dec(&cm_node->listener->pend_accepts_cnt);
2377 }
2378 if (cm_node->close_entry)
2379 irdma_handle_close_entry(cm_node, 0);
2380 if (cm_node->listener) {
2381 irdma_dec_refcnt_listen(cm_core, cm_node->listener, 0, true);
2382 } else {
2383 if (cm_node->apbvt_set) {
2384 irdma_del_apbvt(cm_node->iwdev, cm_node->apbvt_entry);
2385 cm_node->apbvt_set = 0;
2386 }
2387 irdma_get_addr_info(cm_node, &nfo);
2388 if (cm_node->qhash_set) {
2389 nfo.qh_qpid = cm_node->iwdev->vsi.ilq->qp_id;
2390 irdma_manage_qhash(cm_node->iwdev, &nfo,
2391 IRDMA_QHASH_TYPE_TCP_ESTABLISHED,
2392 IRDMA_QHASH_MANAGE_TYPE_DELETE, NULL,
2393 false);
2394 cm_node->qhash_set = 0;
2395 }
2396 }
2397
2398 iwqp = cm_node->iwqp;
2399 if (iwqp) {
2400 cm_node->cm_id->rem_ref(cm_node->cm_id);
2401 cm_node->cm_id = NULL;
2402 iwqp->cm_id = NULL;
2403 irdma_qp_rem_ref(&iwqp->ibqp);
2404 cm_node->iwqp = NULL;
2405 } else if (cm_node->qhash_set) {
2406 irdma_get_addr_info(cm_node, &nfo);
2407 nfo.qh_qpid = cm_node->iwdev->vsi.ilq->qp_id;
2408 irdma_manage_qhash(cm_node->iwdev, &nfo,
2409 IRDMA_QHASH_TYPE_TCP_ESTABLISHED,
2410 IRDMA_QHASH_MANAGE_TYPE_DELETE, NULL, false);
2411 cm_node->qhash_set = 0;
2412 }
2413
2414 cm_core->cm_free_ah(cm_node);
2415 }
2416
2417 /**
2418 * irdma_rem_ref_cm_node - destroy an instance of a cm node
2419 * @cm_node: connection's node
2420 */
irdma_rem_ref_cm_node(struct irdma_cm_node * cm_node)2421 void irdma_rem_ref_cm_node(struct irdma_cm_node *cm_node)
2422 {
2423 struct irdma_cm_core *cm_core = cm_node->cm_core;
2424 unsigned long flags;
2425
2426 trace_irdma_rem_ref_cm_node(cm_node, 0, __builtin_return_address(0));
2427 spin_lock_irqsave(&cm_core->ht_lock, flags);
2428
2429 if (!refcount_dec_and_test(&cm_node->refcnt)) {
2430 spin_unlock_irqrestore(&cm_core->ht_lock, flags);
2431 return;
2432 }
2433 if (cm_node->iwqp) {
2434 cm_node->iwqp->cm_node = NULL;
2435 cm_node->iwqp->cm_id = NULL;
2436 }
2437 hash_del_rcu(&cm_node->list);
2438 cm_node->cm_core->stats_nodes_destroyed++;
2439
2440 spin_unlock_irqrestore(&cm_core->ht_lock, flags);
2441
2442 irdma_destroy_connection(cm_node);
2443
2444 kfree_rcu(cm_node, rcu_head);
2445 }
2446
2447 /**
2448 * irdma_handle_fin_pkt - FIN packet received
2449 * @cm_node: connection's node
2450 */
irdma_handle_fin_pkt(struct irdma_cm_node * cm_node)2451 static void irdma_handle_fin_pkt(struct irdma_cm_node *cm_node)
2452 {
2453 switch (cm_node->state) {
2454 case IRDMA_CM_STATE_SYN_RCVD:
2455 case IRDMA_CM_STATE_SYN_SENT:
2456 case IRDMA_CM_STATE_ESTABLISHED:
2457 case IRDMA_CM_STATE_MPAREJ_RCVD:
2458 cm_node->tcp_cntxt.rcv_nxt++;
2459 irdma_cleanup_retrans_entry(cm_node);
2460 cm_node->state = IRDMA_CM_STATE_LAST_ACK;
2461 irdma_send_fin(cm_node);
2462 break;
2463 case IRDMA_CM_STATE_MPAREQ_SENT:
2464 irdma_create_event(cm_node, IRDMA_CM_EVENT_ABORTED);
2465 cm_node->tcp_cntxt.rcv_nxt++;
2466 irdma_cleanup_retrans_entry(cm_node);
2467 cm_node->state = IRDMA_CM_STATE_CLOSED;
2468 refcount_inc(&cm_node->refcnt);
2469 irdma_send_reset(cm_node);
2470 break;
2471 case IRDMA_CM_STATE_FIN_WAIT1:
2472 cm_node->tcp_cntxt.rcv_nxt++;
2473 irdma_cleanup_retrans_entry(cm_node);
2474 cm_node->state = IRDMA_CM_STATE_CLOSING;
2475 irdma_send_ack(cm_node);
2476 /*
2477 * Wait for ACK as this is simultaneous close.
2478 * After we receive ACK, do not send anything.
2479 * Just rm the node.
2480 */
2481 break;
2482 case IRDMA_CM_STATE_FIN_WAIT2:
2483 cm_node->tcp_cntxt.rcv_nxt++;
2484 irdma_cleanup_retrans_entry(cm_node);
2485 cm_node->state = IRDMA_CM_STATE_TIME_WAIT;
2486 irdma_send_ack(cm_node);
2487 irdma_schedule_cm_timer(cm_node, NULL, IRDMA_TIMER_TYPE_CLOSE,
2488 1, 0);
2489 break;
2490 case IRDMA_CM_STATE_TIME_WAIT:
2491 cm_node->tcp_cntxt.rcv_nxt++;
2492 irdma_cleanup_retrans_entry(cm_node);
2493 cm_node->state = IRDMA_CM_STATE_CLOSED;
2494 irdma_rem_ref_cm_node(cm_node);
2495 break;
2496 case IRDMA_CM_STATE_OFFLOADED:
2497 default:
2498 ibdev_dbg(&cm_node->iwdev->ibdev,
2499 "CM: bad state node state = %d\n", cm_node->state);
2500 break;
2501 }
2502 }
2503
2504 /**
2505 * irdma_handle_rst_pkt - process received RST packet
2506 * @cm_node: connection's node
2507 * @rbuf: receive buffer
2508 */
irdma_handle_rst_pkt(struct irdma_cm_node * cm_node,struct irdma_puda_buf * rbuf)2509 static void irdma_handle_rst_pkt(struct irdma_cm_node *cm_node,
2510 struct irdma_puda_buf *rbuf)
2511 {
2512 ibdev_dbg(&cm_node->iwdev->ibdev,
2513 "CM: caller: %pS cm_node=%p state=%d rem_port=0x%04x loc_port=0x%04x rem_addr=%pI4 loc_addr=%pI4\n",
2514 __builtin_return_address(0), cm_node, cm_node->state,
2515 cm_node->rem_port, cm_node->loc_port, cm_node->rem_addr,
2516 cm_node->loc_addr);
2517
2518 irdma_cleanup_retrans_entry(cm_node);
2519 switch (cm_node->state) {
2520 case IRDMA_CM_STATE_SYN_SENT:
2521 case IRDMA_CM_STATE_MPAREQ_SENT:
2522 switch (cm_node->mpa_frame_rev) {
2523 case IETF_MPA_V2:
2524 /* Drop down to MPA_V1*/
2525 cm_node->mpa_frame_rev = IETF_MPA_V1;
2526 /* send a syn and goto syn sent state */
2527 cm_node->state = IRDMA_CM_STATE_SYN_SENT;
2528 if (irdma_send_syn(cm_node, 0))
2529 irdma_active_open_err(cm_node, false);
2530 break;
2531 case IETF_MPA_V1:
2532 default:
2533 irdma_active_open_err(cm_node, false);
2534 break;
2535 }
2536 break;
2537 case IRDMA_CM_STATE_MPAREQ_RCVD:
2538 atomic_inc(&cm_node->passive_state);
2539 break;
2540 case IRDMA_CM_STATE_ESTABLISHED:
2541 case IRDMA_CM_STATE_SYN_RCVD:
2542 case IRDMA_CM_STATE_LISTENING:
2543 irdma_passive_open_err(cm_node, false);
2544 break;
2545 case IRDMA_CM_STATE_OFFLOADED:
2546 irdma_active_open_err(cm_node, false);
2547 break;
2548 case IRDMA_CM_STATE_CLOSED:
2549 break;
2550 case IRDMA_CM_STATE_FIN_WAIT2:
2551 case IRDMA_CM_STATE_FIN_WAIT1:
2552 case IRDMA_CM_STATE_LAST_ACK:
2553 case IRDMA_CM_STATE_TIME_WAIT:
2554 cm_node->state = IRDMA_CM_STATE_CLOSED;
2555 irdma_rem_ref_cm_node(cm_node);
2556 break;
2557 default:
2558 break;
2559 }
2560 }
2561
2562 /**
2563 * irdma_handle_rcv_mpa - Process a recv'd mpa buffer
2564 * @cm_node: connection's node
2565 * @rbuf: receive buffer
2566 */
irdma_handle_rcv_mpa(struct irdma_cm_node * cm_node,struct irdma_puda_buf * rbuf)2567 static void irdma_handle_rcv_mpa(struct irdma_cm_node *cm_node,
2568 struct irdma_puda_buf *rbuf)
2569 {
2570 int err;
2571 int datasize = rbuf->datalen;
2572 u8 *dataloc = rbuf->data;
2573
2574 enum irdma_cm_event_type type = IRDMA_CM_EVENT_UNKNOWN;
2575 u32 res_type;
2576
2577 err = irdma_parse_mpa(cm_node, dataloc, &res_type, datasize);
2578 if (err) {
2579 if (cm_node->state == IRDMA_CM_STATE_MPAREQ_SENT)
2580 irdma_active_open_err(cm_node, true);
2581 else
2582 irdma_passive_open_err(cm_node, true);
2583 return;
2584 }
2585
2586 switch (cm_node->state) {
2587 case IRDMA_CM_STATE_ESTABLISHED:
2588 if (res_type == IRDMA_MPA_REQUEST_REJECT)
2589 ibdev_dbg(&cm_node->iwdev->ibdev,
2590 "CM: state for reject\n");
2591 cm_node->state = IRDMA_CM_STATE_MPAREQ_RCVD;
2592 type = IRDMA_CM_EVENT_MPA_REQ;
2593 irdma_send_ack(cm_node); /* ACK received MPA request */
2594 atomic_set(&cm_node->passive_state,
2595 IRDMA_PASSIVE_STATE_INDICATED);
2596 break;
2597 case IRDMA_CM_STATE_MPAREQ_SENT:
2598 irdma_cleanup_retrans_entry(cm_node);
2599 if (res_type == IRDMA_MPA_REQUEST_REJECT) {
2600 type = IRDMA_CM_EVENT_MPA_REJECT;
2601 cm_node->state = IRDMA_CM_STATE_MPAREJ_RCVD;
2602 } else {
2603 type = IRDMA_CM_EVENT_CONNECTED;
2604 cm_node->state = IRDMA_CM_STATE_OFFLOADED;
2605 }
2606 irdma_send_ack(cm_node);
2607 break;
2608 default:
2609 ibdev_dbg(&cm_node->iwdev->ibdev,
2610 "CM: wrong cm_node state =%d\n", cm_node->state);
2611 break;
2612 }
2613 irdma_create_event(cm_node, type);
2614 }
2615
2616 /**
2617 * irdma_check_syn - Check for error on received syn ack
2618 * @cm_node: connection's node
2619 * @tcph: pointer tcp header
2620 */
irdma_check_syn(struct irdma_cm_node * cm_node,struct tcphdr * tcph)2621 static int irdma_check_syn(struct irdma_cm_node *cm_node, struct tcphdr *tcph)
2622 {
2623 if (ntohl(tcph->ack_seq) != cm_node->tcp_cntxt.loc_seq_num) {
2624 irdma_active_open_err(cm_node, true);
2625 return 1;
2626 }
2627
2628 return 0;
2629 }
2630
2631 /**
2632 * irdma_check_seq - check seq numbers if OK
2633 * @cm_node: connection's node
2634 * @tcph: pointer tcp header
2635 */
irdma_check_seq(struct irdma_cm_node * cm_node,struct tcphdr * tcph)2636 static int irdma_check_seq(struct irdma_cm_node *cm_node, struct tcphdr *tcph)
2637 {
2638 u32 seq;
2639 u32 ack_seq;
2640 u32 loc_seq_num = cm_node->tcp_cntxt.loc_seq_num;
2641 u32 rcv_nxt = cm_node->tcp_cntxt.rcv_nxt;
2642 u32 rcv_wnd;
2643 int err = 0;
2644
2645 seq = ntohl(tcph->seq);
2646 ack_seq = ntohl(tcph->ack_seq);
2647 rcv_wnd = cm_node->tcp_cntxt.rcv_wnd;
2648 if (ack_seq != loc_seq_num ||
2649 !between(seq, rcv_nxt, (rcv_nxt + rcv_wnd)))
2650 err = -1;
2651 if (err)
2652 ibdev_dbg(&cm_node->iwdev->ibdev,
2653 "CM: seq number err\n");
2654
2655 return err;
2656 }
2657
irdma_add_conn_est_qh(struct irdma_cm_node * cm_node)2658 void irdma_add_conn_est_qh(struct irdma_cm_node *cm_node)
2659 {
2660 struct irdma_cm_info nfo;
2661
2662 irdma_get_addr_info(cm_node, &nfo);
2663 nfo.qh_qpid = cm_node->iwdev->vsi.ilq->qp_id;
2664 irdma_manage_qhash(cm_node->iwdev, &nfo,
2665 IRDMA_QHASH_TYPE_TCP_ESTABLISHED,
2666 IRDMA_QHASH_MANAGE_TYPE_ADD,
2667 cm_node, false);
2668 cm_node->qhash_set = true;
2669 }
2670
2671 /**
2672 * irdma_handle_syn_pkt - is for Passive node
2673 * @cm_node: connection's node
2674 * @rbuf: receive buffer
2675 */
irdma_handle_syn_pkt(struct irdma_cm_node * cm_node,struct irdma_puda_buf * rbuf)2676 static void irdma_handle_syn_pkt(struct irdma_cm_node *cm_node,
2677 struct irdma_puda_buf *rbuf)
2678 {
2679 struct tcphdr *tcph = (struct tcphdr *)rbuf->tcph;
2680 int err;
2681 u32 inc_sequence;
2682 int optionsize;
2683
2684 optionsize = (tcph->doff << 2) - sizeof(struct tcphdr);
2685 inc_sequence = ntohl(tcph->seq);
2686
2687 switch (cm_node->state) {
2688 case IRDMA_CM_STATE_SYN_SENT:
2689 case IRDMA_CM_STATE_MPAREQ_SENT:
2690 /* Rcvd syn on active open connection */
2691 irdma_active_open_err(cm_node, 1);
2692 break;
2693 case IRDMA_CM_STATE_LISTENING:
2694 /* Passive OPEN */
2695 if (atomic_read(&cm_node->listener->pend_accepts_cnt) >
2696 cm_node->listener->backlog) {
2697 cm_node->cm_core->stats_backlog_drops++;
2698 irdma_passive_open_err(cm_node, false);
2699 break;
2700 }
2701 err = irdma_handle_tcp_options(cm_node, tcph, optionsize, 1);
2702 if (err) {
2703 irdma_passive_open_err(cm_node, false);
2704 /* drop pkt */
2705 break;
2706 }
2707 err = cm_node->cm_core->cm_create_ah(cm_node, false);
2708 if (err) {
2709 irdma_passive_open_err(cm_node, false);
2710 /* drop pkt */
2711 break;
2712 }
2713 cm_node->tcp_cntxt.rcv_nxt = inc_sequence + 1;
2714 cm_node->accept_pend = 1;
2715 atomic_inc(&cm_node->listener->pend_accepts_cnt);
2716
2717 cm_node->state = IRDMA_CM_STATE_SYN_RCVD;
2718 break;
2719 case IRDMA_CM_STATE_CLOSED:
2720 irdma_cleanup_retrans_entry(cm_node);
2721 refcount_inc(&cm_node->refcnt);
2722 irdma_send_reset(cm_node);
2723 break;
2724 case IRDMA_CM_STATE_OFFLOADED:
2725 case IRDMA_CM_STATE_ESTABLISHED:
2726 case IRDMA_CM_STATE_FIN_WAIT1:
2727 case IRDMA_CM_STATE_FIN_WAIT2:
2728 case IRDMA_CM_STATE_MPAREQ_RCVD:
2729 case IRDMA_CM_STATE_LAST_ACK:
2730 case IRDMA_CM_STATE_CLOSING:
2731 case IRDMA_CM_STATE_UNKNOWN:
2732 default:
2733 break;
2734 }
2735 }
2736
2737 /**
2738 * irdma_handle_synack_pkt - Process SYN+ACK packet (active side)
2739 * @cm_node: connection's node
2740 * @rbuf: receive buffer
2741 */
irdma_handle_synack_pkt(struct irdma_cm_node * cm_node,struct irdma_puda_buf * rbuf)2742 static void irdma_handle_synack_pkt(struct irdma_cm_node *cm_node,
2743 struct irdma_puda_buf *rbuf)
2744 {
2745 struct tcphdr *tcph = (struct tcphdr *)rbuf->tcph;
2746 int err;
2747 u32 inc_sequence;
2748 int optionsize;
2749
2750 optionsize = (tcph->doff << 2) - sizeof(struct tcphdr);
2751 inc_sequence = ntohl(tcph->seq);
2752 switch (cm_node->state) {
2753 case IRDMA_CM_STATE_SYN_SENT:
2754 irdma_cleanup_retrans_entry(cm_node);
2755 /* active open */
2756 if (irdma_check_syn(cm_node, tcph)) {
2757 ibdev_dbg(&cm_node->iwdev->ibdev,
2758 "CM: check syn fail\n");
2759 return;
2760 }
2761 cm_node->tcp_cntxt.rem_ack_num = ntohl(tcph->ack_seq);
2762 /* setup options */
2763 err = irdma_handle_tcp_options(cm_node, tcph, optionsize, 0);
2764 if (err) {
2765 ibdev_dbg(&cm_node->iwdev->ibdev,
2766 "CM: cm_node=%p tcp_options failed\n",
2767 cm_node);
2768 break;
2769 }
2770 irdma_cleanup_retrans_entry(cm_node);
2771 cm_node->tcp_cntxt.rcv_nxt = inc_sequence + 1;
2772 irdma_send_ack(cm_node); /* ACK for the syn_ack */
2773 err = irdma_send_mpa_request(cm_node);
2774 if (err) {
2775 ibdev_dbg(&cm_node->iwdev->ibdev,
2776 "CM: cm_node=%p irdma_send_mpa_request failed\n",
2777 cm_node);
2778 break;
2779 }
2780 cm_node->state = IRDMA_CM_STATE_MPAREQ_SENT;
2781 break;
2782 case IRDMA_CM_STATE_MPAREQ_RCVD:
2783 irdma_passive_open_err(cm_node, true);
2784 break;
2785 case IRDMA_CM_STATE_LISTENING:
2786 cm_node->tcp_cntxt.loc_seq_num = ntohl(tcph->ack_seq);
2787 irdma_cleanup_retrans_entry(cm_node);
2788 cm_node->state = IRDMA_CM_STATE_CLOSED;
2789 irdma_send_reset(cm_node);
2790 break;
2791 case IRDMA_CM_STATE_CLOSED:
2792 cm_node->tcp_cntxt.loc_seq_num = ntohl(tcph->ack_seq);
2793 irdma_cleanup_retrans_entry(cm_node);
2794 refcount_inc(&cm_node->refcnt);
2795 irdma_send_reset(cm_node);
2796 break;
2797 case IRDMA_CM_STATE_ESTABLISHED:
2798 case IRDMA_CM_STATE_FIN_WAIT1:
2799 case IRDMA_CM_STATE_FIN_WAIT2:
2800 case IRDMA_CM_STATE_LAST_ACK:
2801 case IRDMA_CM_STATE_OFFLOADED:
2802 case IRDMA_CM_STATE_CLOSING:
2803 case IRDMA_CM_STATE_UNKNOWN:
2804 case IRDMA_CM_STATE_MPAREQ_SENT:
2805 default:
2806 break;
2807 }
2808 }
2809
2810 /**
2811 * irdma_handle_ack_pkt - process packet with ACK
2812 * @cm_node: connection's node
2813 * @rbuf: receive buffer
2814 */
irdma_handle_ack_pkt(struct irdma_cm_node * cm_node,struct irdma_puda_buf * rbuf)2815 static int irdma_handle_ack_pkt(struct irdma_cm_node *cm_node,
2816 struct irdma_puda_buf *rbuf)
2817 {
2818 struct tcphdr *tcph = (struct tcphdr *)rbuf->tcph;
2819 u32 inc_sequence;
2820 int ret;
2821 int optionsize;
2822 u32 datasize = rbuf->datalen;
2823
2824 optionsize = (tcph->doff << 2) - sizeof(struct tcphdr);
2825
2826 if (irdma_check_seq(cm_node, tcph))
2827 return -EINVAL;
2828
2829 inc_sequence = ntohl(tcph->seq);
2830 switch (cm_node->state) {
2831 case IRDMA_CM_STATE_SYN_RCVD:
2832 irdma_cleanup_retrans_entry(cm_node);
2833 ret = irdma_handle_tcp_options(cm_node, tcph, optionsize, 1);
2834 if (ret)
2835 return ret;
2836 cm_node->tcp_cntxt.rem_ack_num = ntohl(tcph->ack_seq);
2837 cm_node->state = IRDMA_CM_STATE_ESTABLISHED;
2838 if (datasize) {
2839 cm_node->tcp_cntxt.rcv_nxt = inc_sequence + datasize;
2840 irdma_handle_rcv_mpa(cm_node, rbuf);
2841 }
2842 break;
2843 case IRDMA_CM_STATE_ESTABLISHED:
2844 irdma_cleanup_retrans_entry(cm_node);
2845 if (datasize) {
2846 cm_node->tcp_cntxt.rcv_nxt = inc_sequence + datasize;
2847 irdma_handle_rcv_mpa(cm_node, rbuf);
2848 }
2849 break;
2850 case IRDMA_CM_STATE_MPAREQ_SENT:
2851 cm_node->tcp_cntxt.rem_ack_num = ntohl(tcph->ack_seq);
2852 if (datasize) {
2853 cm_node->tcp_cntxt.rcv_nxt = inc_sequence + datasize;
2854 cm_node->ack_rcvd = false;
2855 irdma_handle_rcv_mpa(cm_node, rbuf);
2856 } else {
2857 cm_node->ack_rcvd = true;
2858 }
2859 break;
2860 case IRDMA_CM_STATE_LISTENING:
2861 irdma_cleanup_retrans_entry(cm_node);
2862 cm_node->state = IRDMA_CM_STATE_CLOSED;
2863 irdma_send_reset(cm_node);
2864 break;
2865 case IRDMA_CM_STATE_CLOSED:
2866 irdma_cleanup_retrans_entry(cm_node);
2867 refcount_inc(&cm_node->refcnt);
2868 irdma_send_reset(cm_node);
2869 break;
2870 case IRDMA_CM_STATE_LAST_ACK:
2871 case IRDMA_CM_STATE_CLOSING:
2872 irdma_cleanup_retrans_entry(cm_node);
2873 cm_node->state = IRDMA_CM_STATE_CLOSED;
2874 irdma_rem_ref_cm_node(cm_node);
2875 break;
2876 case IRDMA_CM_STATE_FIN_WAIT1:
2877 irdma_cleanup_retrans_entry(cm_node);
2878 cm_node->state = IRDMA_CM_STATE_FIN_WAIT2;
2879 break;
2880 case IRDMA_CM_STATE_SYN_SENT:
2881 case IRDMA_CM_STATE_FIN_WAIT2:
2882 case IRDMA_CM_STATE_OFFLOADED:
2883 case IRDMA_CM_STATE_MPAREQ_RCVD:
2884 case IRDMA_CM_STATE_UNKNOWN:
2885 default:
2886 irdma_cleanup_retrans_entry(cm_node);
2887 break;
2888 }
2889
2890 return 0;
2891 }
2892
2893 /**
2894 * irdma_process_pkt - process cm packet
2895 * @cm_node: connection's node
2896 * @rbuf: receive buffer
2897 */
irdma_process_pkt(struct irdma_cm_node * cm_node,struct irdma_puda_buf * rbuf)2898 static void irdma_process_pkt(struct irdma_cm_node *cm_node,
2899 struct irdma_puda_buf *rbuf)
2900 {
2901 enum irdma_tcpip_pkt_type pkt_type = IRDMA_PKT_TYPE_UNKNOWN;
2902 struct tcphdr *tcph = (struct tcphdr *)rbuf->tcph;
2903 u32 fin_set = 0;
2904 int err;
2905
2906 if (tcph->rst) {
2907 pkt_type = IRDMA_PKT_TYPE_RST;
2908 } else if (tcph->syn) {
2909 pkt_type = IRDMA_PKT_TYPE_SYN;
2910 if (tcph->ack)
2911 pkt_type = IRDMA_PKT_TYPE_SYNACK;
2912 } else if (tcph->ack) {
2913 pkt_type = IRDMA_PKT_TYPE_ACK;
2914 }
2915 if (tcph->fin)
2916 fin_set = 1;
2917
2918 switch (pkt_type) {
2919 case IRDMA_PKT_TYPE_SYN:
2920 irdma_handle_syn_pkt(cm_node, rbuf);
2921 break;
2922 case IRDMA_PKT_TYPE_SYNACK:
2923 irdma_handle_synack_pkt(cm_node, rbuf);
2924 break;
2925 case IRDMA_PKT_TYPE_ACK:
2926 err = irdma_handle_ack_pkt(cm_node, rbuf);
2927 if (fin_set && !err)
2928 irdma_handle_fin_pkt(cm_node);
2929 break;
2930 case IRDMA_PKT_TYPE_RST:
2931 irdma_handle_rst_pkt(cm_node, rbuf);
2932 break;
2933 default:
2934 if (fin_set &&
2935 (!irdma_check_seq(cm_node, (struct tcphdr *)rbuf->tcph)))
2936 irdma_handle_fin_pkt(cm_node);
2937 break;
2938 }
2939 }
2940
2941 /**
2942 * irdma_make_listen_node - create a listen node with params
2943 * @cm_core: cm's core
2944 * @iwdev: iwarp device structure
2945 * @cm_info: quad info for connection
2946 */
2947 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)2948 irdma_make_listen_node(struct irdma_cm_core *cm_core,
2949 struct irdma_device *iwdev,
2950 struct irdma_cm_info *cm_info)
2951 {
2952 struct irdma_cm_listener *listener;
2953 unsigned long flags;
2954
2955 /* cannot have multiple matching listeners */
2956 listener =
2957 irdma_find_listener(cm_core, cm_info->loc_addr, cm_info->ipv4,
2958 cm_info->loc_port, cm_info->vlan_id,
2959 IRDMA_CM_LISTENER_EITHER_STATE);
2960 if (listener &&
2961 listener->listener_state == IRDMA_CM_LISTENER_ACTIVE_STATE) {
2962 refcount_dec(&listener->refcnt);
2963 return NULL;
2964 }
2965
2966 if (!listener) {
2967 /* create a CM listen node
2968 * 1/2 node to compare incoming traffic to
2969 */
2970 listener = kzalloc(sizeof(*listener), GFP_KERNEL);
2971 if (!listener)
2972 return NULL;
2973 cm_core->stats_listen_nodes_created++;
2974 memcpy(listener->loc_addr, cm_info->loc_addr,
2975 sizeof(listener->loc_addr));
2976 listener->loc_port = cm_info->loc_port;
2977
2978 INIT_LIST_HEAD(&listener->child_listen_list);
2979
2980 refcount_set(&listener->refcnt, 1);
2981 } else {
2982 listener->reused_node = 1;
2983 }
2984
2985 listener->cm_id = cm_info->cm_id;
2986 listener->ipv4 = cm_info->ipv4;
2987 listener->vlan_id = cm_info->vlan_id;
2988 atomic_set(&listener->pend_accepts_cnt, 0);
2989 listener->cm_core = cm_core;
2990 listener->iwdev = iwdev;
2991
2992 listener->backlog = cm_info->backlog;
2993 listener->listener_state = IRDMA_CM_LISTENER_ACTIVE_STATE;
2994
2995 if (!listener->reused_node) {
2996 spin_lock_irqsave(&cm_core->listen_list_lock, flags);
2997 list_add(&listener->list, &cm_core->listen_list);
2998 spin_unlock_irqrestore(&cm_core->listen_list_lock, flags);
2999 }
3000
3001 return listener;
3002 }
3003
3004 /**
3005 * irdma_create_cm_node - make a connection node with params
3006 * @cm_core: cm's core
3007 * @iwdev: iwarp device structure
3008 * @conn_param: connection parameters
3009 * @cm_info: quad info for connection
3010 * @caller_cm_node: pointer to cm_node structure to return
3011 */
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)3012 static int irdma_create_cm_node(struct irdma_cm_core *cm_core,
3013 struct irdma_device *iwdev,
3014 struct iw_cm_conn_param *conn_param,
3015 struct irdma_cm_info *cm_info,
3016 struct irdma_cm_node **caller_cm_node)
3017 {
3018 struct irdma_cm_node *cm_node;
3019 u16 private_data_len = conn_param->private_data_len;
3020 const void *private_data = conn_param->private_data;
3021
3022 /* create a CM connection node */
3023 cm_node = irdma_make_cm_node(cm_core, iwdev, cm_info, NULL);
3024 if (!cm_node)
3025 return -ENOMEM;
3026
3027 /* set our node side to client (active) side */
3028 cm_node->tcp_cntxt.client = 1;
3029 cm_node->tcp_cntxt.rcv_wscale = IRDMA_CM_DEFAULT_RCV_WND_SCALE;
3030
3031 irdma_record_ird_ord(cm_node, conn_param->ird, conn_param->ord);
3032
3033 cm_node->pdata.size = private_data_len;
3034 cm_node->pdata.addr = cm_node->pdata_buf;
3035
3036 memcpy(cm_node->pdata_buf, private_data, private_data_len);
3037 *caller_cm_node = cm_node;
3038
3039 return 0;
3040 }
3041
3042 /**
3043 * irdma_cm_reject - reject and teardown a connection
3044 * @cm_node: connection's node
3045 * @pdata: ptr to private data for reject
3046 * @plen: size of private data
3047 */
irdma_cm_reject(struct irdma_cm_node * cm_node,const void * pdata,u8 plen)3048 static int irdma_cm_reject(struct irdma_cm_node *cm_node, const void *pdata,
3049 u8 plen)
3050 {
3051 int ret;
3052 int passive_state;
3053
3054 if (cm_node->tcp_cntxt.client)
3055 return 0;
3056
3057 irdma_cleanup_retrans_entry(cm_node);
3058
3059 passive_state = atomic_add_return(1, &cm_node->passive_state);
3060 if (passive_state == IRDMA_SEND_RESET_EVENT) {
3061 cm_node->state = IRDMA_CM_STATE_CLOSED;
3062 irdma_rem_ref_cm_node(cm_node);
3063 return 0;
3064 }
3065
3066 if (cm_node->state == IRDMA_CM_STATE_LISTENER_DESTROYED) {
3067 irdma_rem_ref_cm_node(cm_node);
3068 return 0;
3069 }
3070
3071 ret = irdma_send_mpa_reject(cm_node, pdata, plen);
3072 if (!ret)
3073 return 0;
3074
3075 cm_node->state = IRDMA_CM_STATE_CLOSED;
3076 if (irdma_send_reset(cm_node))
3077 ibdev_dbg(&cm_node->iwdev->ibdev,
3078 "CM: send reset failed\n");
3079
3080 return ret;
3081 }
3082
3083 /**
3084 * irdma_cm_close - close of cm connection
3085 * @cm_node: connection's node
3086 */
irdma_cm_close(struct irdma_cm_node * cm_node)3087 static int irdma_cm_close(struct irdma_cm_node *cm_node)
3088 {
3089 switch (cm_node->state) {
3090 case IRDMA_CM_STATE_SYN_RCVD:
3091 case IRDMA_CM_STATE_SYN_SENT:
3092 case IRDMA_CM_STATE_ONE_SIDE_ESTABLISHED:
3093 case IRDMA_CM_STATE_ESTABLISHED:
3094 case IRDMA_CM_STATE_ACCEPTING:
3095 case IRDMA_CM_STATE_MPAREQ_SENT:
3096 case IRDMA_CM_STATE_MPAREQ_RCVD:
3097 irdma_cleanup_retrans_entry(cm_node);
3098 irdma_send_reset(cm_node);
3099 break;
3100 case IRDMA_CM_STATE_CLOSE_WAIT:
3101 cm_node->state = IRDMA_CM_STATE_LAST_ACK;
3102 irdma_send_fin(cm_node);
3103 break;
3104 case IRDMA_CM_STATE_FIN_WAIT1:
3105 case IRDMA_CM_STATE_FIN_WAIT2:
3106 case IRDMA_CM_STATE_LAST_ACK:
3107 case IRDMA_CM_STATE_TIME_WAIT:
3108 case IRDMA_CM_STATE_CLOSING:
3109 return -EINVAL;
3110 case IRDMA_CM_STATE_LISTENING:
3111 irdma_cleanup_retrans_entry(cm_node);
3112 irdma_send_reset(cm_node);
3113 break;
3114 case IRDMA_CM_STATE_MPAREJ_RCVD:
3115 case IRDMA_CM_STATE_UNKNOWN:
3116 case IRDMA_CM_STATE_INITED:
3117 case IRDMA_CM_STATE_CLOSED:
3118 case IRDMA_CM_STATE_LISTENER_DESTROYED:
3119 irdma_rem_ref_cm_node(cm_node);
3120 break;
3121 case IRDMA_CM_STATE_OFFLOADED:
3122 if (cm_node->send_entry)
3123 ibdev_dbg(&cm_node->iwdev->ibdev,
3124 "CM: CM send_entry in OFFLOADED state\n");
3125 irdma_rem_ref_cm_node(cm_node);
3126 break;
3127 }
3128
3129 return 0;
3130 }
3131
3132 /**
3133 * irdma_receive_ilq - recv an ETHERNET packet, and process it
3134 * through CM
3135 * @vsi: VSI structure of dev
3136 * @rbuf: receive buffer
3137 */
irdma_receive_ilq(struct irdma_sc_vsi * vsi,struct irdma_puda_buf * rbuf)3138 void irdma_receive_ilq(struct irdma_sc_vsi *vsi, struct irdma_puda_buf *rbuf)
3139 {
3140 struct irdma_cm_node *cm_node;
3141 struct irdma_cm_listener *listener;
3142 struct iphdr *iph;
3143 struct ipv6hdr *ip6h;
3144 struct tcphdr *tcph;
3145 struct irdma_cm_info cm_info = {};
3146 struct irdma_device *iwdev = vsi->back_vsi;
3147 struct irdma_cm_core *cm_core = &iwdev->cm_core;
3148 struct vlan_ethhdr *ethh;
3149 u16 vtag;
3150
3151 /* if vlan, then maclen = 18 else 14 */
3152 iph = (struct iphdr *)rbuf->iph;
3153 print_hex_dump_debug("ILQ: RECEIVE ILQ BUFFER", DUMP_PREFIX_OFFSET,
3154 16, 8, rbuf->mem.va, rbuf->totallen, false);
3155 if (iwdev->rf->sc_dev.hw_attrs.uk_attrs.hw_rev >= IRDMA_GEN_2) {
3156 if (rbuf->vlan_valid) {
3157 vtag = rbuf->vlan_id;
3158 cm_info.user_pri = (vtag & VLAN_PRIO_MASK) >>
3159 VLAN_PRIO_SHIFT;
3160 cm_info.vlan_id = vtag & VLAN_VID_MASK;
3161 } else {
3162 cm_info.vlan_id = 0xFFFF;
3163 }
3164 } else {
3165 ethh = rbuf->mem.va;
3166
3167 if (ethh->h_vlan_proto == htons(ETH_P_8021Q)) {
3168 vtag = ntohs(ethh->h_vlan_TCI);
3169 cm_info.user_pri = (vtag & VLAN_PRIO_MASK) >>
3170 VLAN_PRIO_SHIFT;
3171 cm_info.vlan_id = vtag & VLAN_VID_MASK;
3172 ibdev_dbg(&cm_core->iwdev->ibdev,
3173 "CM: vlan_id=%d\n", cm_info.vlan_id);
3174 } else {
3175 cm_info.vlan_id = 0xFFFF;
3176 }
3177 }
3178 tcph = (struct tcphdr *)rbuf->tcph;
3179
3180 if (rbuf->ipv4) {
3181 cm_info.loc_addr[0] = ntohl(iph->daddr);
3182 cm_info.rem_addr[0] = ntohl(iph->saddr);
3183 cm_info.ipv4 = true;
3184 cm_info.tos = iph->tos;
3185 } else {
3186 ip6h = (struct ipv6hdr *)rbuf->iph;
3187 irdma_copy_ip_ntohl(cm_info.loc_addr,
3188 ip6h->daddr.in6_u.u6_addr32);
3189 irdma_copy_ip_ntohl(cm_info.rem_addr,
3190 ip6h->saddr.in6_u.u6_addr32);
3191 cm_info.ipv4 = false;
3192 cm_info.tos = (ip6h->priority << 4) | (ip6h->flow_lbl[0] >> 4);
3193 }
3194 cm_info.loc_port = ntohs(tcph->dest);
3195 cm_info.rem_port = ntohs(tcph->source);
3196 cm_node = irdma_find_node(cm_core, cm_info.rem_port, cm_info.rem_addr,
3197 cm_info.loc_port, cm_info.loc_addr, cm_info.vlan_id);
3198
3199 if (!cm_node) {
3200 /* Only type of packet accepted are for the
3201 * PASSIVE open (syn only)
3202 */
3203 if (!tcph->syn || tcph->ack)
3204 return;
3205
3206 listener = irdma_find_listener(cm_core,
3207 cm_info.loc_addr,
3208 cm_info.ipv4,
3209 cm_info.loc_port,
3210 cm_info.vlan_id,
3211 IRDMA_CM_LISTENER_ACTIVE_STATE);
3212 if (!listener) {
3213 cm_info.cm_id = NULL;
3214 ibdev_dbg(&cm_core->iwdev->ibdev,
3215 "CM: no listener found\n");
3216 return;
3217 }
3218
3219 cm_info.cm_id = listener->cm_id;
3220 cm_node = irdma_make_cm_node(cm_core, iwdev, &cm_info,
3221 listener);
3222 if (!cm_node) {
3223 ibdev_dbg(&cm_core->iwdev->ibdev,
3224 "CM: allocate node failed\n");
3225 refcount_dec(&listener->refcnt);
3226 return;
3227 }
3228
3229 if (!tcph->rst && !tcph->fin) {
3230 cm_node->state = IRDMA_CM_STATE_LISTENING;
3231 } else {
3232 irdma_rem_ref_cm_node(cm_node);
3233 return;
3234 }
3235
3236 refcount_inc(&cm_node->refcnt);
3237 } else if (cm_node->state == IRDMA_CM_STATE_OFFLOADED) {
3238 irdma_rem_ref_cm_node(cm_node);
3239 return;
3240 }
3241
3242 irdma_process_pkt(cm_node, rbuf);
3243 irdma_rem_ref_cm_node(cm_node);
3244 }
3245
irdma_add_qh(struct irdma_cm_node * cm_node,bool active)3246 static int irdma_add_qh(struct irdma_cm_node *cm_node, bool active)
3247 {
3248 if (!active)
3249 irdma_add_conn_est_qh(cm_node);
3250 return 0;
3251 }
3252
irdma_cm_free_ah_nop(struct irdma_cm_node * cm_node)3253 static void irdma_cm_free_ah_nop(struct irdma_cm_node *cm_node)
3254 {
3255 }
3256
3257 /**
3258 * irdma_setup_cm_core - setup top level instance of a cm core
3259 * @iwdev: iwarp device structure
3260 * @rdma_ver: HW version
3261 */
irdma_setup_cm_core(struct irdma_device * iwdev,u8 rdma_ver)3262 int irdma_setup_cm_core(struct irdma_device *iwdev, u8 rdma_ver)
3263 {
3264 struct irdma_cm_core *cm_core = &iwdev->cm_core;
3265
3266 cm_core->iwdev = iwdev;
3267 cm_core->dev = &iwdev->rf->sc_dev;
3268
3269 /* Handles CM event work items send to Iwarp core */
3270 cm_core->event_wq = alloc_ordered_workqueue("iwarp-event-wq", 0);
3271 if (!cm_core->event_wq)
3272 return -ENOMEM;
3273
3274 INIT_LIST_HEAD(&cm_core->listen_list);
3275
3276 timer_setup(&cm_core->tcp_timer, irdma_cm_timer_tick, 0);
3277
3278 spin_lock_init(&cm_core->ht_lock);
3279 spin_lock_init(&cm_core->listen_list_lock);
3280 spin_lock_init(&cm_core->apbvt_lock);
3281 switch (rdma_ver) {
3282 case IRDMA_GEN_1:
3283 cm_core->form_cm_frame = irdma_form_uda_cm_frame;
3284 cm_core->cm_create_ah = irdma_add_qh;
3285 cm_core->cm_free_ah = irdma_cm_free_ah_nop;
3286 break;
3287 case IRDMA_GEN_2:
3288 default:
3289 cm_core->form_cm_frame = irdma_form_ah_cm_frame;
3290 cm_core->cm_create_ah = irdma_cm_create_ah;
3291 cm_core->cm_free_ah = irdma_cm_free_ah;
3292 }
3293
3294 return 0;
3295 }
3296
3297 /**
3298 * irdma_cleanup_cm_core - deallocate a top level instance of a
3299 * cm core
3300 * @cm_core: cm's core
3301 */
irdma_cleanup_cm_core(struct irdma_cm_core * cm_core)3302 void irdma_cleanup_cm_core(struct irdma_cm_core *cm_core)
3303 {
3304 if (!cm_core)
3305 return;
3306
3307 timer_delete_sync(&cm_core->tcp_timer);
3308
3309 destroy_workqueue(cm_core->event_wq);
3310 cm_core->dev->ws_reset(&cm_core->iwdev->vsi);
3311 }
3312
3313 /**
3314 * irdma_init_tcp_ctx - setup qp context
3315 * @cm_node: connection's node
3316 * @tcp_info: offload info for tcp
3317 * @iwqp: associate qp for the connection
3318 */
irdma_init_tcp_ctx(struct irdma_cm_node * cm_node,struct irdma_tcp_offload_info * tcp_info,struct irdma_qp * iwqp)3319 static void irdma_init_tcp_ctx(struct irdma_cm_node *cm_node,
3320 struct irdma_tcp_offload_info *tcp_info,
3321 struct irdma_qp *iwqp)
3322 {
3323 tcp_info->ipv4 = cm_node->ipv4;
3324 tcp_info->drop_ooo_seg = !iwqp->iwdev->iw_ooo;
3325 tcp_info->wscale = true;
3326 tcp_info->ignore_tcp_opt = true;
3327 tcp_info->ignore_tcp_uns_opt = true;
3328 tcp_info->no_nagle = false;
3329
3330 tcp_info->ttl = IRDMA_DEFAULT_TTL;
3331 tcp_info->rtt_var = IRDMA_DEFAULT_RTT_VAR;
3332 tcp_info->ss_thresh = IRDMA_DEFAULT_SS_THRESH;
3333 tcp_info->rexmit_thresh = IRDMA_DEFAULT_REXMIT_THRESH;
3334
3335 tcp_info->tcp_state = IRDMA_TCP_STATE_ESTABLISHED;
3336 tcp_info->snd_wscale = cm_node->tcp_cntxt.snd_wscale;
3337 tcp_info->rcv_wscale = cm_node->tcp_cntxt.rcv_wscale;
3338
3339 tcp_info->snd_nxt = cm_node->tcp_cntxt.loc_seq_num;
3340 tcp_info->snd_wnd = cm_node->tcp_cntxt.snd_wnd;
3341 tcp_info->rcv_nxt = cm_node->tcp_cntxt.rcv_nxt;
3342 tcp_info->snd_max = cm_node->tcp_cntxt.loc_seq_num;
3343
3344 tcp_info->snd_una = cm_node->tcp_cntxt.loc_seq_num;
3345 tcp_info->cwnd = 2 * cm_node->tcp_cntxt.mss;
3346 tcp_info->snd_wl1 = cm_node->tcp_cntxt.rcv_nxt;
3347 tcp_info->snd_wl2 = cm_node->tcp_cntxt.loc_seq_num;
3348 tcp_info->max_snd_window = cm_node->tcp_cntxt.max_snd_wnd;
3349 tcp_info->rcv_wnd = cm_node->tcp_cntxt.rcv_wnd
3350 << cm_node->tcp_cntxt.rcv_wscale;
3351
3352 tcp_info->flow_label = 0;
3353 tcp_info->snd_mss = (u32)cm_node->tcp_cntxt.mss;
3354 tcp_info->tos = cm_node->tos;
3355 if (cm_node->vlan_id < VLAN_N_VID) {
3356 tcp_info->insert_vlan_tag = true;
3357 tcp_info->vlan_tag = cm_node->vlan_id;
3358 tcp_info->vlan_tag |= cm_node->user_pri << VLAN_PRIO_SHIFT;
3359 }
3360 if (cm_node->ipv4) {
3361 tcp_info->src_port = cm_node->loc_port;
3362 tcp_info->dst_port = cm_node->rem_port;
3363
3364 tcp_info->dest_ip_addr[3] = cm_node->rem_addr[0];
3365 tcp_info->local_ipaddr[3] = cm_node->loc_addr[0];
3366 tcp_info->arp_idx = (u16)irdma_arp_table(iwqp->iwdev->rf,
3367 &tcp_info->dest_ip_addr[3],
3368 true, NULL,
3369 IRDMA_ARP_RESOLVE);
3370 } else {
3371 tcp_info->src_port = cm_node->loc_port;
3372 tcp_info->dst_port = cm_node->rem_port;
3373 memcpy(tcp_info->dest_ip_addr, cm_node->rem_addr,
3374 sizeof(tcp_info->dest_ip_addr));
3375 memcpy(tcp_info->local_ipaddr, cm_node->loc_addr,
3376 sizeof(tcp_info->local_ipaddr));
3377
3378 tcp_info->arp_idx = (u16)irdma_arp_table(iwqp->iwdev->rf,
3379 &tcp_info->dest_ip_addr[0],
3380 false, NULL,
3381 IRDMA_ARP_RESOLVE);
3382 }
3383 }
3384
3385 /**
3386 * irdma_cm_init_tsa_conn - setup qp for RTS
3387 * @iwqp: associate qp for the connection
3388 * @cm_node: connection's node
3389 */
irdma_cm_init_tsa_conn(struct irdma_qp * iwqp,struct irdma_cm_node * cm_node)3390 static void irdma_cm_init_tsa_conn(struct irdma_qp *iwqp,
3391 struct irdma_cm_node *cm_node)
3392 {
3393 struct irdma_iwarp_offload_info *iwarp_info;
3394 struct irdma_qp_host_ctx_info *ctx_info;
3395
3396 iwarp_info = &iwqp->iwarp_info;
3397 ctx_info = &iwqp->ctx_info;
3398
3399 ctx_info->tcp_info = &iwqp->tcp_info;
3400 ctx_info->send_cq_num = iwqp->iwscq->sc_cq.cq_uk.cq_id;
3401 ctx_info->rcv_cq_num = iwqp->iwrcq->sc_cq.cq_uk.cq_id;
3402
3403 iwarp_info->ord_size = cm_node->ord_size;
3404 iwarp_info->ird_size = cm_node->ird_size;
3405 iwarp_info->rd_en = true;
3406 iwarp_info->rdmap_ver = 1;
3407 iwarp_info->ddp_ver = 1;
3408 iwarp_info->pd_id = iwqp->iwpd->sc_pd.pd_id;
3409
3410 ctx_info->tcp_info_valid = true;
3411 ctx_info->iwarp_info_valid = true;
3412 ctx_info->user_pri = cm_node->user_pri;
3413
3414 irdma_init_tcp_ctx(cm_node, &iwqp->tcp_info, iwqp);
3415 if (cm_node->snd_mark_en) {
3416 iwarp_info->snd_mark_en = true;
3417 iwarp_info->snd_mark_offset = (iwqp->tcp_info.snd_nxt & SNDMARKER_SEQNMASK) +
3418 cm_node->lsmm_size;
3419 }
3420
3421 cm_node->state = IRDMA_CM_STATE_OFFLOADED;
3422 iwqp->tcp_info.tcp_state = IRDMA_TCP_STATE_ESTABLISHED;
3423 iwqp->tcp_info.src_mac_addr_idx = iwqp->iwdev->mac_ip_table_idx;
3424
3425 if (cm_node->rcv_mark_en) {
3426 iwarp_info->rcv_mark_en = true;
3427 iwarp_info->align_hdrs = true;
3428 }
3429
3430 irdma_sc_qp_setctx(&iwqp->sc_qp, iwqp->host_ctx.va, ctx_info);
3431
3432 /* once tcp_info is set, no need to do it again */
3433 ctx_info->tcp_info_valid = false;
3434 ctx_info->iwarp_info_valid = false;
3435 }
3436
3437 /**
3438 * irdma_cm_disconn - when a connection is being closed
3439 * @iwqp: associated qp for the connection
3440 */
irdma_cm_disconn(struct irdma_qp * iwqp)3441 void irdma_cm_disconn(struct irdma_qp *iwqp)
3442 {
3443 struct irdma_device *iwdev = iwqp->iwdev;
3444 struct disconn_work *work;
3445 unsigned long flags;
3446
3447 work = kzalloc(sizeof(*work), GFP_ATOMIC);
3448 if (!work)
3449 return;
3450
3451 spin_lock_irqsave(&iwdev->rf->qptable_lock, flags);
3452 if (!iwdev->rf->qp_table[iwqp->ibqp.qp_num]) {
3453 spin_unlock_irqrestore(&iwdev->rf->qptable_lock, flags);
3454 ibdev_dbg(&iwdev->ibdev,
3455 "CM: qp_id %d is already freed\n",
3456 iwqp->ibqp.qp_num);
3457 kfree(work);
3458 return;
3459 }
3460 irdma_qp_add_ref(&iwqp->ibqp);
3461 spin_unlock_irqrestore(&iwdev->rf->qptable_lock, flags);
3462
3463 work->iwqp = iwqp;
3464 INIT_WORK(&work->work, irdma_disconnect_worker);
3465 queue_work(iwdev->cleanup_wq, &work->work);
3466 }
3467
3468 /**
3469 * irdma_qp_disconnect - free qp and close cm
3470 * @iwqp: associate qp for the connection
3471 */
irdma_qp_disconnect(struct irdma_qp * iwqp)3472 static void irdma_qp_disconnect(struct irdma_qp *iwqp)
3473 {
3474 struct irdma_device *iwdev = iwqp->iwdev;
3475
3476 iwqp->active_conn = 0;
3477 /* close the CM node down if it is still active */
3478 ibdev_dbg(&iwdev->ibdev, "CM: Call close API\n");
3479 irdma_cm_close(iwqp->cm_node);
3480 }
3481
3482 /**
3483 * irdma_cm_disconn_true - called by worker thread to disconnect qp
3484 * @iwqp: associate qp for the connection
3485 */
irdma_cm_disconn_true(struct irdma_qp * iwqp)3486 static void irdma_cm_disconn_true(struct irdma_qp *iwqp)
3487 {
3488 struct iw_cm_id *cm_id;
3489 struct irdma_device *iwdev;
3490 struct irdma_sc_qp *qp = &iwqp->sc_qp;
3491 u16 last_ae;
3492 u8 original_hw_tcp_state;
3493 u8 original_ibqp_state;
3494 int disconn_status = 0;
3495 int issue_disconn = 0;
3496 int issue_close = 0;
3497 int issue_flush = 0;
3498 unsigned long flags;
3499 int err;
3500
3501 iwdev = iwqp->iwdev;
3502 spin_lock_irqsave(&iwqp->lock, flags);
3503 if (rdma_protocol_roce(&iwdev->ibdev, 1)) {
3504 struct ib_qp_attr attr;
3505
3506 if (iwqp->flush_issued || iwqp->sc_qp.qp_uk.destroy_pending) {
3507 spin_unlock_irqrestore(&iwqp->lock, flags);
3508 return;
3509 }
3510
3511 spin_unlock_irqrestore(&iwqp->lock, flags);
3512
3513 attr.qp_state = IB_QPS_ERR;
3514 irdma_modify_qp_roce(&iwqp->ibqp, &attr, IB_QP_STATE, NULL);
3515 irdma_ib_qp_event(iwqp, qp->event_type);
3516 return;
3517 }
3518
3519 cm_id = iwqp->cm_id;
3520 original_hw_tcp_state = iwqp->hw_tcp_state;
3521 original_ibqp_state = iwqp->ibqp_state;
3522 last_ae = iwqp->last_aeq;
3523
3524 if (qp->term_flags) {
3525 issue_disconn = 1;
3526 issue_close = 1;
3527 iwqp->cm_id = NULL;
3528 irdma_terminate_del_timer(qp);
3529 if (!iwqp->flush_issued) {
3530 iwqp->flush_issued = 1;
3531 issue_flush = 1;
3532 }
3533 } else if ((original_hw_tcp_state == IRDMA_TCP_STATE_CLOSE_WAIT) ||
3534 ((original_ibqp_state == IB_QPS_RTS) &&
3535 (last_ae == IRDMA_AE_LLP_CONNECTION_RESET))) {
3536 issue_disconn = 1;
3537 if (last_ae == IRDMA_AE_LLP_CONNECTION_RESET)
3538 disconn_status = -ECONNRESET;
3539 }
3540
3541 if (original_hw_tcp_state == IRDMA_TCP_STATE_CLOSED ||
3542 original_hw_tcp_state == IRDMA_TCP_STATE_TIME_WAIT ||
3543 last_ae == IRDMA_AE_RDMAP_ROE_BAD_LLP_CLOSE ||
3544 last_ae == IRDMA_AE_BAD_CLOSE ||
3545 last_ae == IRDMA_AE_LLP_CONNECTION_RESET || iwdev->rf->reset || !cm_id) {
3546 issue_close = 1;
3547 iwqp->cm_id = NULL;
3548 qp->term_flags = 0;
3549 if (!iwqp->flush_issued) {
3550 iwqp->flush_issued = 1;
3551 issue_flush = 1;
3552 }
3553 }
3554
3555 spin_unlock_irqrestore(&iwqp->lock, flags);
3556 if (issue_flush && !iwqp->sc_qp.qp_uk.destroy_pending) {
3557 irdma_flush_wqes(iwqp, IRDMA_FLUSH_SQ | IRDMA_FLUSH_RQ |
3558 IRDMA_FLUSH_WAIT);
3559
3560 if (qp->term_flags)
3561 irdma_ib_qp_event(iwqp, qp->event_type);
3562 }
3563
3564 if (!cm_id || !cm_id->event_handler)
3565 return;
3566
3567 spin_lock_irqsave(&iwdev->cm_core.ht_lock, flags);
3568 if (!iwqp->cm_node) {
3569 spin_unlock_irqrestore(&iwdev->cm_core.ht_lock, flags);
3570 return;
3571 }
3572 refcount_inc(&iwqp->cm_node->refcnt);
3573
3574 spin_unlock_irqrestore(&iwdev->cm_core.ht_lock, flags);
3575
3576 if (issue_disconn) {
3577 err = irdma_send_cm_event(iwqp->cm_node, cm_id,
3578 IW_CM_EVENT_DISCONNECT,
3579 disconn_status);
3580 if (err)
3581 ibdev_dbg(&iwdev->ibdev,
3582 "CM: disconnect event failed: - cm_id = %p\n",
3583 cm_id);
3584 }
3585 if (issue_close) {
3586 cm_id->provider_data = iwqp;
3587 err = irdma_send_cm_event(iwqp->cm_node, cm_id,
3588 IW_CM_EVENT_CLOSE, 0);
3589 if (err)
3590 ibdev_dbg(&iwdev->ibdev,
3591 "CM: close event failed: - cm_id = %p\n",
3592 cm_id);
3593 irdma_qp_disconnect(iwqp);
3594 }
3595 irdma_rem_ref_cm_node(iwqp->cm_node);
3596 }
3597
3598 /**
3599 * irdma_disconnect_worker - worker for connection close
3600 * @work: points or disconn structure
3601 */
irdma_disconnect_worker(struct work_struct * work)3602 static void irdma_disconnect_worker(struct work_struct *work)
3603 {
3604 struct disconn_work *dwork = container_of(work, struct disconn_work, work);
3605 struct irdma_qp *iwqp = dwork->iwqp;
3606
3607 kfree(dwork);
3608 irdma_cm_disconn_true(iwqp);
3609 irdma_qp_rem_ref(&iwqp->ibqp);
3610 }
3611
3612 /**
3613 * irdma_free_lsmm_rsrc - free lsmm memory and deregister
3614 * @iwqp: associate qp for the connection
3615 */
irdma_free_lsmm_rsrc(struct irdma_qp * iwqp)3616 void irdma_free_lsmm_rsrc(struct irdma_qp *iwqp)
3617 {
3618 struct irdma_device *iwdev;
3619
3620 iwdev = iwqp->iwdev;
3621
3622 if (iwqp->ietf_mem.va) {
3623 if (iwqp->lsmm_mr)
3624 iwdev->ibdev.ops.dereg_mr(iwqp->lsmm_mr, NULL);
3625 dma_free_coherent(iwdev->rf->sc_dev.hw->device,
3626 iwqp->ietf_mem.size, iwqp->ietf_mem.va,
3627 iwqp->ietf_mem.pa);
3628 iwqp->ietf_mem.va = NULL;
3629 }
3630 }
3631
3632 /**
3633 * irdma_accept - registered call for connection to be accepted
3634 * @cm_id: cm information for passive connection
3635 * @conn_param: accept parameters
3636 */
irdma_accept(struct iw_cm_id * cm_id,struct iw_cm_conn_param * conn_param)3637 int irdma_accept(struct iw_cm_id *cm_id, struct iw_cm_conn_param *conn_param)
3638 {
3639 struct ib_qp *ibqp;
3640 struct irdma_qp *iwqp;
3641 struct irdma_device *iwdev;
3642 struct irdma_sc_dev *dev;
3643 struct irdma_cm_node *cm_node;
3644 struct ib_qp_attr attr = {};
3645 int passive_state;
3646 struct ib_mr *ibmr;
3647 struct irdma_pd *iwpd;
3648 u16 buf_len = 0;
3649 struct irdma_kmem_info accept;
3650 u64 tagged_offset;
3651 int wait_ret;
3652 int ret = 0;
3653
3654 ibqp = irdma_get_qp(cm_id->device, conn_param->qpn);
3655 if (!ibqp)
3656 return -EINVAL;
3657
3658 iwqp = to_iwqp(ibqp);
3659 iwdev = iwqp->iwdev;
3660 dev = &iwdev->rf->sc_dev;
3661 cm_node = cm_id->provider_data;
3662
3663 if (((struct sockaddr_in *)&cm_id->local_addr)->sin_family == AF_INET) {
3664 cm_node->ipv4 = true;
3665 cm_node->vlan_id = irdma_get_vlan_ipv4(cm_node->loc_addr);
3666 } else {
3667 cm_node->ipv4 = false;
3668 irdma_get_vlan_mac_ipv6(cm_node->loc_addr, &cm_node->vlan_id,
3669 NULL);
3670 }
3671 ibdev_dbg(&iwdev->ibdev, "CM: Accept vlan_id=%d\n",
3672 cm_node->vlan_id);
3673
3674 trace_irdma_accept(cm_node, 0, NULL);
3675
3676 if (cm_node->state == IRDMA_CM_STATE_LISTENER_DESTROYED) {
3677 ret = -EINVAL;
3678 goto error;
3679 }
3680
3681 passive_state = atomic_add_return(1, &cm_node->passive_state);
3682 if (passive_state == IRDMA_SEND_RESET_EVENT) {
3683 ret = -ECONNRESET;
3684 goto error;
3685 }
3686
3687 buf_len = conn_param->private_data_len + IRDMA_MAX_IETF_SIZE;
3688 iwqp->ietf_mem.size = ALIGN(buf_len, 1);
3689 iwqp->ietf_mem.va = dma_alloc_coherent(dev->hw->device,
3690 iwqp->ietf_mem.size,
3691 &iwqp->ietf_mem.pa, GFP_KERNEL);
3692 if (!iwqp->ietf_mem.va) {
3693 ret = -ENOMEM;
3694 goto error;
3695 }
3696
3697 cm_node->pdata.size = conn_param->private_data_len;
3698 accept.addr = iwqp->ietf_mem.va;
3699 accept.size = irdma_cm_build_mpa_frame(cm_node, &accept, MPA_KEY_REPLY);
3700 memcpy((u8 *)accept.addr + accept.size, conn_param->private_data,
3701 conn_param->private_data_len);
3702
3703 if (cm_node->dev->ws_add(iwqp->sc_qp.vsi, cm_node->user_pri)) {
3704 ret = -ENOMEM;
3705 goto error;
3706 }
3707 iwqp->sc_qp.user_pri = cm_node->user_pri;
3708 irdma_qp_add_qos(&iwqp->sc_qp);
3709 /* setup our first outgoing iWarp send WQE (the IETF frame response) */
3710 iwpd = iwqp->iwpd;
3711 tagged_offset = (uintptr_t)iwqp->ietf_mem.va;
3712 ibmr = irdma_reg_phys_mr(&iwpd->ibpd, iwqp->ietf_mem.pa, buf_len,
3713 IB_ACCESS_LOCAL_WRITE, &tagged_offset);
3714 if (IS_ERR(ibmr)) {
3715 ret = -ENOMEM;
3716 goto error;
3717 }
3718
3719 ibmr->pd = &iwpd->ibpd;
3720 ibmr->device = iwpd->ibpd.device;
3721 iwqp->lsmm_mr = ibmr;
3722 if (iwqp->page)
3723 iwqp->sc_qp.qp_uk.sq_base = kmap_local_page(iwqp->page);
3724
3725 cm_node->lsmm_size = accept.size + conn_param->private_data_len;
3726 irdma_sc_send_lsmm(&iwqp->sc_qp, iwqp->ietf_mem.va, cm_node->lsmm_size,
3727 ibmr->lkey);
3728
3729 if (iwqp->page)
3730 kunmap_local(iwqp->sc_qp.qp_uk.sq_base);
3731
3732 iwqp->cm_id = cm_id;
3733 cm_node->cm_id = cm_id;
3734
3735 cm_id->provider_data = iwqp;
3736 iwqp->active_conn = 0;
3737 iwqp->cm_node = cm_node;
3738 cm_node->iwqp = iwqp;
3739 irdma_cm_init_tsa_conn(iwqp, cm_node);
3740 irdma_qp_add_ref(&iwqp->ibqp);
3741 cm_id->add_ref(cm_id);
3742
3743 attr.qp_state = IB_QPS_RTS;
3744 cm_node->qhash_set = false;
3745 cm_node->cm_core->cm_free_ah(cm_node);
3746
3747 irdma_modify_qp(&iwqp->ibqp, &attr, IB_QP_STATE, NULL);
3748 if (dev->hw_attrs.uk_attrs.feature_flags & IRDMA_FEATURE_RTS_AE) {
3749 wait_ret = wait_event_interruptible_timeout(iwqp->waitq,
3750 iwqp->rts_ae_rcvd,
3751 IRDMA_MAX_TIMEOUT);
3752 if (!wait_ret) {
3753 ibdev_dbg(&iwdev->ibdev,
3754 "CM: Slow Connection: cm_node=%p, loc_port=%d, rem_port=%d, cm_id=%p\n",
3755 cm_node, cm_node->loc_port,
3756 cm_node->rem_port, cm_node->cm_id);
3757 ret = -ECONNRESET;
3758 goto error;
3759 }
3760 }
3761
3762 irdma_send_cm_event(cm_node, cm_id, IW_CM_EVENT_ESTABLISHED, 0);
3763 cm_node->accelerated = true;
3764 complete(&cm_node->establish_comp);
3765
3766 if (cm_node->accept_pend) {
3767 atomic_dec(&cm_node->listener->pend_accepts_cnt);
3768 cm_node->accept_pend = 0;
3769 }
3770
3771 ibdev_dbg(&iwdev->ibdev,
3772 "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",
3773 cm_node->rem_port, cm_node->loc_port, cm_node->rem_addr,
3774 cm_node->loc_addr, cm_node, cm_id, ibqp->qp_num);
3775 cm_node->cm_core->stats_accepts++;
3776
3777 return 0;
3778 error:
3779 irdma_free_lsmm_rsrc(iwqp);
3780 irdma_rem_ref_cm_node(cm_node);
3781
3782 return ret;
3783 }
3784
3785 /**
3786 * irdma_reject - registered call for connection to be rejected
3787 * @cm_id: cm information for passive connection
3788 * @pdata: private data to be sent
3789 * @pdata_len: private data length
3790 */
irdma_reject(struct iw_cm_id * cm_id,const void * pdata,u8 pdata_len)3791 int irdma_reject(struct iw_cm_id *cm_id, const void *pdata, u8 pdata_len)
3792 {
3793 struct irdma_device *iwdev;
3794 struct irdma_cm_node *cm_node;
3795
3796 cm_node = cm_id->provider_data;
3797 cm_node->pdata.size = pdata_len;
3798
3799 trace_irdma_reject(cm_node, 0, NULL);
3800
3801 iwdev = to_iwdev(cm_id->device);
3802 if (!iwdev)
3803 return -EINVAL;
3804
3805 cm_node->cm_core->stats_rejects++;
3806
3807 if (pdata_len + sizeof(struct ietf_mpa_v2) > IRDMA_MAX_CM_BUF)
3808 return -EINVAL;
3809
3810 return irdma_cm_reject(cm_node, pdata, pdata_len);
3811 }
3812
3813 /**
3814 * irdma_connect - registered call for connection to be established
3815 * @cm_id: cm information for passive connection
3816 * @conn_param: Information about the connection
3817 */
irdma_connect(struct iw_cm_id * cm_id,struct iw_cm_conn_param * conn_param)3818 int irdma_connect(struct iw_cm_id *cm_id, struct iw_cm_conn_param *conn_param)
3819 {
3820 struct ib_qp *ibqp;
3821 struct irdma_qp *iwqp;
3822 struct irdma_device *iwdev;
3823 struct irdma_cm_node *cm_node;
3824 struct irdma_cm_info cm_info;
3825 struct sockaddr_in *laddr;
3826 struct sockaddr_in *raddr;
3827 struct sockaddr_in6 *laddr6;
3828 struct sockaddr_in6 *raddr6;
3829 int ret = 0;
3830
3831 ibqp = irdma_get_qp(cm_id->device, conn_param->qpn);
3832 if (!ibqp)
3833 return -EINVAL;
3834 iwqp = to_iwqp(ibqp);
3835 if (!iwqp)
3836 return -EINVAL;
3837 iwdev = iwqp->iwdev;
3838 if (!iwdev)
3839 return -EINVAL;
3840
3841 laddr = (struct sockaddr_in *)&cm_id->m_local_addr;
3842 raddr = (struct sockaddr_in *)&cm_id->m_remote_addr;
3843 laddr6 = (struct sockaddr_in6 *)&cm_id->m_local_addr;
3844 raddr6 = (struct sockaddr_in6 *)&cm_id->m_remote_addr;
3845
3846 if (!(laddr->sin_port) || !(raddr->sin_port))
3847 return -EINVAL;
3848
3849 iwqp->active_conn = 1;
3850 iwqp->cm_id = NULL;
3851 cm_id->provider_data = iwqp;
3852
3853 /* set up the connection params for the node */
3854 if (cm_id->remote_addr.ss_family == AF_INET) {
3855 if (iwdev->vsi.mtu < IRDMA_MIN_MTU_IPV4)
3856 return -EINVAL;
3857
3858 cm_info.ipv4 = true;
3859 memset(cm_info.loc_addr, 0, sizeof(cm_info.loc_addr));
3860 memset(cm_info.rem_addr, 0, sizeof(cm_info.rem_addr));
3861 cm_info.loc_addr[0] = ntohl(laddr->sin_addr.s_addr);
3862 cm_info.rem_addr[0] = ntohl(raddr->sin_addr.s_addr);
3863 cm_info.loc_port = ntohs(laddr->sin_port);
3864 cm_info.rem_port = ntohs(raddr->sin_port);
3865 cm_info.vlan_id = irdma_get_vlan_ipv4(cm_info.loc_addr);
3866 } else {
3867 if (iwdev->vsi.mtu < IRDMA_MIN_MTU_IPV6)
3868 return -EINVAL;
3869
3870 cm_info.ipv4 = false;
3871 irdma_copy_ip_ntohl(cm_info.loc_addr,
3872 laddr6->sin6_addr.in6_u.u6_addr32);
3873 irdma_copy_ip_ntohl(cm_info.rem_addr,
3874 raddr6->sin6_addr.in6_u.u6_addr32);
3875 cm_info.loc_port = ntohs(laddr6->sin6_port);
3876 cm_info.rem_port = ntohs(raddr6->sin6_port);
3877 irdma_get_vlan_mac_ipv6(cm_info.loc_addr, &cm_info.vlan_id,
3878 NULL);
3879 }
3880 cm_info.cm_id = cm_id;
3881 cm_info.qh_qpid = iwdev->vsi.ilq->qp_id;
3882 cm_info.tos = cm_id->tos;
3883 if (iwdev->vsi.dscp_mode) {
3884 cm_info.user_pri =
3885 iwqp->sc_qp.vsi->dscp_map[irdma_tos2dscp(cm_info.tos)];
3886 } else {
3887 cm_info.user_pri = rt_tos2priority(cm_id->tos);
3888 cm_info.user_pri = irdma_iw_get_vlan_prio(cm_info.loc_addr,
3889 cm_info.user_pri,
3890 cm_info.ipv4);
3891 }
3892
3893 if (iwqp->sc_qp.dev->ws_add(iwqp->sc_qp.vsi, cm_info.user_pri))
3894 return -ENOMEM;
3895 iwqp->sc_qp.user_pri = cm_info.user_pri;
3896 irdma_qp_add_qos(&iwqp->sc_qp);
3897 ibdev_dbg(&iwdev->ibdev, "DCB: TOS:[%d] UP:[%d]\n", cm_id->tos,
3898 cm_info.user_pri);
3899
3900 trace_irdma_dcb_tos(iwdev, cm_id->tos, cm_info.user_pri);
3901
3902 ret = irdma_create_cm_node(&iwdev->cm_core, iwdev, conn_param, &cm_info,
3903 &cm_node);
3904 if (ret)
3905 return ret;
3906 ret = cm_node->cm_core->cm_create_ah(cm_node, true);
3907 if (ret)
3908 goto err;
3909 if (irdma_manage_qhash(iwdev, &cm_info,
3910 IRDMA_QHASH_TYPE_TCP_ESTABLISHED,
3911 IRDMA_QHASH_MANAGE_TYPE_ADD, NULL, true)) {
3912 ret = -EINVAL;
3913 goto err;
3914 }
3915 cm_node->qhash_set = true;
3916
3917 cm_node->apbvt_entry = irdma_add_apbvt(iwdev, cm_info.loc_port);
3918 if (!cm_node->apbvt_entry) {
3919 ret = -EINVAL;
3920 goto err;
3921 }
3922
3923 cm_node->apbvt_set = true;
3924 iwqp->cm_node = cm_node;
3925 cm_node->iwqp = iwqp;
3926 iwqp->cm_id = cm_id;
3927 irdma_qp_add_ref(&iwqp->ibqp);
3928 cm_id->add_ref(cm_id);
3929
3930 if (cm_node->state != IRDMA_CM_STATE_OFFLOADED) {
3931 cm_node->state = IRDMA_CM_STATE_SYN_SENT;
3932 ret = irdma_send_syn(cm_node, 0);
3933 if (ret)
3934 goto err;
3935 }
3936
3937 ibdev_dbg(&iwdev->ibdev,
3938 "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",
3939 cm_node->rem_port, cm_node->loc_port, cm_node->rem_addr,
3940 cm_node->loc_addr, cm_node, cm_id, ibqp->qp_num);
3941
3942 trace_irdma_connect(cm_node, 0, NULL);
3943
3944 return 0;
3945
3946 err:
3947 if (cm_info.ipv4)
3948 ibdev_dbg(&iwdev->ibdev,
3949 "CM: connect() FAILED: dest addr=%pI4",
3950 cm_info.rem_addr);
3951 else
3952 ibdev_dbg(&iwdev->ibdev,
3953 "CM: connect() FAILED: dest addr=%pI6",
3954 cm_info.rem_addr);
3955 irdma_rem_ref_cm_node(cm_node);
3956 iwdev->cm_core.stats_connect_errs++;
3957
3958 return ret;
3959 }
3960
3961 /**
3962 * irdma_create_listen - registered call creating listener
3963 * @cm_id: cm information for passive connection
3964 * @backlog: to max accept pending count
3965 */
irdma_create_listen(struct iw_cm_id * cm_id,int backlog)3966 int irdma_create_listen(struct iw_cm_id *cm_id, int backlog)
3967 {
3968 struct irdma_device *iwdev;
3969 struct irdma_cm_listener *cm_listen_node;
3970 struct irdma_cm_info cm_info = {};
3971 struct sockaddr_in *laddr;
3972 struct sockaddr_in6 *laddr6;
3973 bool wildcard = false;
3974 int err;
3975
3976 iwdev = to_iwdev(cm_id->device);
3977 if (!iwdev)
3978 return -EINVAL;
3979
3980 laddr = (struct sockaddr_in *)&cm_id->m_local_addr;
3981 laddr6 = (struct sockaddr_in6 *)&cm_id->m_local_addr;
3982 cm_info.qh_qpid = iwdev->vsi.ilq->qp_id;
3983
3984 if (laddr->sin_family == AF_INET) {
3985 if (iwdev->vsi.mtu < IRDMA_MIN_MTU_IPV4)
3986 return -EINVAL;
3987
3988 cm_info.ipv4 = true;
3989 cm_info.loc_addr[0] = ntohl(laddr->sin_addr.s_addr);
3990 cm_info.loc_port = ntohs(laddr->sin_port);
3991
3992 if (laddr->sin_addr.s_addr != htonl(INADDR_ANY)) {
3993 cm_info.vlan_id = irdma_get_vlan_ipv4(cm_info.loc_addr);
3994 } else {
3995 cm_info.vlan_id = 0xFFFF;
3996 wildcard = true;
3997 }
3998 } else {
3999 if (iwdev->vsi.mtu < IRDMA_MIN_MTU_IPV6)
4000 return -EINVAL;
4001
4002 cm_info.ipv4 = false;
4003 irdma_copy_ip_ntohl(cm_info.loc_addr,
4004 laddr6->sin6_addr.in6_u.u6_addr32);
4005 cm_info.loc_port = ntohs(laddr6->sin6_port);
4006 if (ipv6_addr_type(&laddr6->sin6_addr) != IPV6_ADDR_ANY) {
4007 irdma_get_vlan_mac_ipv6(cm_info.loc_addr,
4008 &cm_info.vlan_id, NULL);
4009 } else {
4010 cm_info.vlan_id = 0xFFFF;
4011 wildcard = true;
4012 }
4013 }
4014
4015 if (cm_info.vlan_id >= VLAN_N_VID && iwdev->dcb_vlan_mode)
4016 cm_info.vlan_id = 0;
4017 cm_info.backlog = backlog;
4018 cm_info.cm_id = cm_id;
4019
4020 trace_irdma_create_listen(iwdev, &cm_info);
4021
4022 cm_listen_node = irdma_make_listen_node(&iwdev->cm_core, iwdev,
4023 &cm_info);
4024 if (!cm_listen_node) {
4025 ibdev_dbg(&iwdev->ibdev,
4026 "CM: cm_listen_node == NULL\n");
4027 return -ENOMEM;
4028 }
4029
4030 cm_id->provider_data = cm_listen_node;
4031
4032 cm_listen_node->tos = cm_id->tos;
4033 if (iwdev->vsi.dscp_mode)
4034 cm_listen_node->user_pri =
4035 iwdev->vsi.dscp_map[irdma_tos2dscp(cm_id->tos)];
4036 else
4037 cm_listen_node->user_pri = rt_tos2priority(cm_id->tos);
4038 cm_info.user_pri = cm_listen_node->user_pri;
4039 if (!cm_listen_node->reused_node) {
4040 if (wildcard) {
4041 err = irdma_add_mqh(iwdev, &cm_info, cm_listen_node);
4042 if (err)
4043 goto error;
4044 } else {
4045 if (!iwdev->vsi.dscp_mode)
4046 cm_listen_node->user_pri =
4047 irdma_iw_get_vlan_prio(cm_info.loc_addr,
4048 cm_info.user_pri,
4049 cm_info.ipv4);
4050 cm_info.user_pri = cm_listen_node->user_pri;
4051 err = irdma_manage_qhash(iwdev, &cm_info,
4052 IRDMA_QHASH_TYPE_TCP_SYN,
4053 IRDMA_QHASH_MANAGE_TYPE_ADD,
4054 NULL, true);
4055 if (err)
4056 goto error;
4057
4058 cm_listen_node->qhash_set = true;
4059 }
4060
4061 cm_listen_node->apbvt_entry = irdma_add_apbvt(iwdev,
4062 cm_info.loc_port);
4063 if (!cm_listen_node->apbvt_entry)
4064 goto error;
4065 }
4066 cm_id->add_ref(cm_id);
4067 cm_listen_node->cm_core->stats_listen_created++;
4068 ibdev_dbg(&iwdev->ibdev,
4069 "CM: loc_port=0x%04x loc_addr=%pI4 cm_listen_node=%p cm_id=%p qhash_set=%d vlan_id=%d\n",
4070 cm_listen_node->loc_port, cm_listen_node->loc_addr,
4071 cm_listen_node, cm_listen_node->cm_id,
4072 cm_listen_node->qhash_set, cm_listen_node->vlan_id);
4073
4074 return 0;
4075
4076 error:
4077
4078 irdma_cm_del_listen(&iwdev->cm_core, cm_listen_node, false);
4079
4080 return -EINVAL;
4081 }
4082
4083 /**
4084 * irdma_destroy_listen - registered call to destroy listener
4085 * @cm_id: cm information for passive connection
4086 */
irdma_destroy_listen(struct iw_cm_id * cm_id)4087 int irdma_destroy_listen(struct iw_cm_id *cm_id)
4088 {
4089 struct irdma_device *iwdev;
4090
4091 iwdev = to_iwdev(cm_id->device);
4092 if (cm_id->provider_data)
4093 irdma_cm_del_listen(&iwdev->cm_core, cm_id->provider_data,
4094 true);
4095 else
4096 ibdev_dbg(&iwdev->ibdev,
4097 "CM: cm_id->provider_data was NULL\n");
4098
4099 cm_id->rem_ref(cm_id);
4100
4101 return 0;
4102 }
4103
4104 /**
4105 * irdma_teardown_list_prep - add conn nodes slated for tear down to list
4106 * @cm_core: cm's core
4107 * @teardown_list: a list to which cm_node will be selected
4108 * @ipaddr: pointer to ip address
4109 * @nfo: pointer to cm_info structure instance
4110 * @disconnect_all: flag indicating disconnect all QPs
4111 */
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)4112 static void irdma_teardown_list_prep(struct irdma_cm_core *cm_core,
4113 struct list_head *teardown_list,
4114 u32 *ipaddr,
4115 struct irdma_cm_info *nfo,
4116 bool disconnect_all)
4117 {
4118 struct irdma_cm_node *cm_node;
4119 int bkt;
4120
4121 hash_for_each_rcu(cm_core->cm_hash_tbl, bkt, cm_node, list) {
4122 if ((disconnect_all ||
4123 (nfo->vlan_id == cm_node->vlan_id &&
4124 !memcmp(cm_node->loc_addr, ipaddr, nfo->ipv4 ? 4 : 16))) &&
4125 refcount_inc_not_zero(&cm_node->refcnt))
4126 list_add(&cm_node->teardown_entry, teardown_list);
4127 }
4128 }
4129
4130 /**
4131 * irdma_cm_event_connected - handle connected active node
4132 * @event: the info for cm_node of connection
4133 */
irdma_cm_event_connected(struct irdma_cm_event * event)4134 static void irdma_cm_event_connected(struct irdma_cm_event *event)
4135 {
4136 struct irdma_qp *iwqp;
4137 struct irdma_device *iwdev;
4138 struct irdma_cm_node *cm_node;
4139 struct irdma_sc_dev *dev;
4140 struct ib_qp_attr attr = {};
4141 struct iw_cm_id *cm_id;
4142 int status;
4143 bool read0;
4144 int wait_ret = 0;
4145
4146 cm_node = event->cm_node;
4147 cm_id = cm_node->cm_id;
4148 iwqp = cm_id->provider_data;
4149 iwdev = iwqp->iwdev;
4150 dev = &iwdev->rf->sc_dev;
4151 if (iwqp->sc_qp.qp_uk.destroy_pending) {
4152 status = -ETIMEDOUT;
4153 goto error;
4154 }
4155
4156 irdma_cm_init_tsa_conn(iwqp, cm_node);
4157 read0 = (cm_node->send_rdma0_op == SEND_RDMA_READ_ZERO);
4158 if (iwqp->page)
4159 iwqp->sc_qp.qp_uk.sq_base = kmap_local_page(iwqp->page);
4160 irdma_sc_send_rtt(&iwqp->sc_qp, read0);
4161 if (iwqp->page)
4162 kunmap_local(iwqp->sc_qp.qp_uk.sq_base);
4163
4164 attr.qp_state = IB_QPS_RTS;
4165 cm_node->qhash_set = false;
4166 irdma_modify_qp(&iwqp->ibqp, &attr, IB_QP_STATE, NULL);
4167 if (dev->hw_attrs.uk_attrs.feature_flags & IRDMA_FEATURE_RTS_AE) {
4168 wait_ret = wait_event_interruptible_timeout(iwqp->waitq,
4169 iwqp->rts_ae_rcvd,
4170 IRDMA_MAX_TIMEOUT);
4171 if (!wait_ret)
4172 ibdev_dbg(&iwdev->ibdev,
4173 "CM: Slow Connection: cm_node=%p, loc_port=%d, rem_port=%d, cm_id=%p\n",
4174 cm_node, cm_node->loc_port,
4175 cm_node->rem_port, cm_node->cm_id);
4176 }
4177
4178 irdma_send_cm_event(cm_node, cm_id, IW_CM_EVENT_CONNECT_REPLY, 0);
4179 cm_node->accelerated = true;
4180 complete(&cm_node->establish_comp);
4181 cm_node->cm_core->cm_free_ah(cm_node);
4182 return;
4183
4184 error:
4185 iwqp->cm_id = NULL;
4186 cm_id->provider_data = NULL;
4187 irdma_send_cm_event(event->cm_node, cm_id, IW_CM_EVENT_CONNECT_REPLY,
4188 status);
4189 irdma_rem_ref_cm_node(event->cm_node);
4190 }
4191
4192 /**
4193 * irdma_cm_event_reset - handle reset
4194 * @event: the info for cm_node of connection
4195 */
irdma_cm_event_reset(struct irdma_cm_event * event)4196 static void irdma_cm_event_reset(struct irdma_cm_event *event)
4197 {
4198 struct irdma_cm_node *cm_node = event->cm_node;
4199 struct iw_cm_id *cm_id = cm_node->cm_id;
4200 struct irdma_qp *iwqp;
4201
4202 if (!cm_id)
4203 return;
4204
4205 iwqp = cm_id->provider_data;
4206 if (!iwqp)
4207 return;
4208
4209 ibdev_dbg(&cm_node->iwdev->ibdev,
4210 "CM: reset event %p - cm_id = %p\n", event->cm_node, cm_id);
4211 iwqp->cm_id = NULL;
4212
4213 irdma_send_cm_event(cm_node, cm_node->cm_id, IW_CM_EVENT_DISCONNECT,
4214 -ECONNRESET);
4215 irdma_send_cm_event(cm_node, cm_node->cm_id, IW_CM_EVENT_CLOSE, 0);
4216 }
4217
4218 /**
4219 * irdma_cm_event_handler - send event to cm upper layer
4220 * @work: pointer of cm event info.
4221 */
irdma_cm_event_handler(struct work_struct * work)4222 static void irdma_cm_event_handler(struct work_struct *work)
4223 {
4224 struct irdma_cm_event *event = container_of(work, struct irdma_cm_event, event_work);
4225 struct irdma_cm_node *cm_node;
4226
4227 if (!event || !event->cm_node || !event->cm_node->cm_core)
4228 return;
4229
4230 cm_node = event->cm_node;
4231 trace_irdma_cm_event_handler(cm_node, event->type, NULL);
4232
4233 switch (event->type) {
4234 case IRDMA_CM_EVENT_MPA_REQ:
4235 irdma_send_cm_event(cm_node, cm_node->cm_id,
4236 IW_CM_EVENT_CONNECT_REQUEST, 0);
4237 break;
4238 case IRDMA_CM_EVENT_RESET:
4239 irdma_cm_event_reset(event);
4240 break;
4241 case IRDMA_CM_EVENT_CONNECTED:
4242 if (!event->cm_node->cm_id ||
4243 event->cm_node->state != IRDMA_CM_STATE_OFFLOADED)
4244 break;
4245 irdma_cm_event_connected(event);
4246 break;
4247 case IRDMA_CM_EVENT_MPA_REJECT:
4248 if (!event->cm_node->cm_id ||
4249 cm_node->state == IRDMA_CM_STATE_OFFLOADED)
4250 break;
4251 irdma_send_cm_event(cm_node, cm_node->cm_id,
4252 IW_CM_EVENT_CONNECT_REPLY, -ECONNREFUSED);
4253 break;
4254 case IRDMA_CM_EVENT_ABORTED:
4255 if (!event->cm_node->cm_id ||
4256 event->cm_node->state == IRDMA_CM_STATE_OFFLOADED)
4257 break;
4258 irdma_event_connect_error(event);
4259 break;
4260 default:
4261 ibdev_dbg(&cm_node->iwdev->ibdev,
4262 "CM: bad event type = %d\n", event->type);
4263 break;
4264 }
4265
4266 irdma_rem_ref_cm_node(event->cm_node);
4267 kfree(event);
4268 }
4269
4270 /**
4271 * irdma_cm_post_event - queue event request for worker thread
4272 * @event: cm node's info for up event call
4273 */
irdma_cm_post_event(struct irdma_cm_event * event)4274 static void irdma_cm_post_event(struct irdma_cm_event *event)
4275 {
4276 refcount_inc(&event->cm_node->refcnt);
4277 INIT_WORK(&event->event_work, irdma_cm_event_handler);
4278 queue_work(event->cm_node->cm_core->event_wq, &event->event_work);
4279 }
4280
4281 /**
4282 * irdma_cm_teardown_connections - teardown QPs
4283 * @iwdev: device pointer
4284 * @ipaddr: Pointer to IPv4 or IPv6 address
4285 * @nfo: Connection info
4286 * @disconnect_all: flag indicating disconnect all QPs
4287 *
4288 * teardown QPs where source or destination addr matches ip addr
4289 */
irdma_cm_teardown_connections(struct irdma_device * iwdev,u32 * ipaddr,struct irdma_cm_info * nfo,bool disconnect_all)4290 void irdma_cm_teardown_connections(struct irdma_device *iwdev, u32 *ipaddr,
4291 struct irdma_cm_info *nfo,
4292 bool disconnect_all)
4293 {
4294 struct irdma_cm_core *cm_core = &iwdev->cm_core;
4295 struct list_head *list_core_temp;
4296 struct list_head *list_node;
4297 struct irdma_cm_node *cm_node;
4298 struct list_head teardown_list;
4299 struct ib_qp_attr attr;
4300
4301 INIT_LIST_HEAD(&teardown_list);
4302
4303 rcu_read_lock();
4304 irdma_teardown_list_prep(cm_core, &teardown_list, ipaddr, nfo, disconnect_all);
4305 rcu_read_unlock();
4306
4307 list_for_each_safe (list_node, list_core_temp, &teardown_list) {
4308 cm_node = container_of(list_node, struct irdma_cm_node,
4309 teardown_entry);
4310 attr.qp_state = IB_QPS_ERR;
4311 irdma_modify_qp(&cm_node->iwqp->ibqp, &attr, IB_QP_STATE, NULL);
4312 if (iwdev->rf->reset)
4313 irdma_cm_disconn(cm_node->iwqp);
4314 irdma_rem_ref_cm_node(cm_node);
4315 }
4316 }
4317
4318 /**
4319 * irdma_qhash_ctrl - enable/disable qhash for list
4320 * @iwdev: device pointer
4321 * @parent_listen_node: parent listen node
4322 * @nfo: cm info node
4323 * @ipaddr: Pointer to IPv4 or IPv6 address
4324 * @ipv4: flag indicating IPv4 when true
4325 * @ifup: flag indicating interface up when true
4326 *
4327 * Enables or disables the qhash for the node in the child
4328 * listen list that matches ipaddr. If no matching IP was found
4329 * it will allocate and add a new child listen node to the
4330 * parent listen node. The listen_list_lock is assumed to be
4331 * held when called.
4332 */
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)4333 static void irdma_qhash_ctrl(struct irdma_device *iwdev,
4334 struct irdma_cm_listener *parent_listen_node,
4335 struct irdma_cm_info *nfo, u32 *ipaddr, bool ipv4,
4336 bool ifup)
4337 {
4338 struct list_head *child_listen_list = &parent_listen_node->child_listen_list;
4339 struct irdma_cm_listener *child_listen_node;
4340 struct list_head *pos, *tpos;
4341 bool node_allocated = false;
4342 enum irdma_quad_hash_manage_type op = ifup ?
4343 IRDMA_QHASH_MANAGE_TYPE_ADD :
4344 IRDMA_QHASH_MANAGE_TYPE_DELETE;
4345 int err;
4346
4347 list_for_each_safe (pos, tpos, child_listen_list) {
4348 child_listen_node = list_entry(pos, struct irdma_cm_listener,
4349 child_listen_list);
4350 if (!memcmp(child_listen_node->loc_addr, ipaddr, ipv4 ? 4 : 16))
4351 goto set_qhash;
4352 }
4353
4354 /* if not found then add a child listener if interface is going up */
4355 if (!ifup)
4356 return;
4357 child_listen_node = kmemdup(parent_listen_node,
4358 sizeof(*child_listen_node), GFP_ATOMIC);
4359 if (!child_listen_node)
4360 return;
4361
4362 node_allocated = true;
4363 memcpy(child_listen_node->loc_addr, ipaddr, ipv4 ? 4 : 16);
4364
4365 set_qhash:
4366 memcpy(nfo->loc_addr, child_listen_node->loc_addr,
4367 sizeof(nfo->loc_addr));
4368 nfo->vlan_id = child_listen_node->vlan_id;
4369 err = irdma_manage_qhash(iwdev, nfo, IRDMA_QHASH_TYPE_TCP_SYN, op, NULL,
4370 false);
4371 if (!err) {
4372 child_listen_node->qhash_set = ifup;
4373 if (node_allocated)
4374 list_add(&child_listen_node->child_listen_list,
4375 &parent_listen_node->child_listen_list);
4376 } else if (node_allocated) {
4377 kfree(child_listen_node);
4378 }
4379 }
4380
4381 /**
4382 * irdma_if_notify - process an ifdown on an interface
4383 * @iwdev: device pointer
4384 * @netdev: network device structure
4385 * @ipaddr: Pointer to IPv4 or IPv6 address
4386 * @ipv4: flag indicating IPv4 when true
4387 * @ifup: flag indicating interface up when true
4388 */
irdma_if_notify(struct irdma_device * iwdev,struct net_device * netdev,u32 * ipaddr,bool ipv4,bool ifup)4389 void irdma_if_notify(struct irdma_device *iwdev, struct net_device *netdev,
4390 u32 *ipaddr, bool ipv4, bool ifup)
4391 {
4392 struct irdma_cm_core *cm_core = &iwdev->cm_core;
4393 unsigned long flags;
4394 struct irdma_cm_listener *listen_node;
4395 static const u32 ip_zero[4] = { 0, 0, 0, 0 };
4396 struct irdma_cm_info nfo = {};
4397 u16 vlan_id = rdma_vlan_dev_vlan_id(netdev);
4398 enum irdma_quad_hash_manage_type op = ifup ?
4399 IRDMA_QHASH_MANAGE_TYPE_ADD :
4400 IRDMA_QHASH_MANAGE_TYPE_DELETE;
4401
4402 nfo.vlan_id = vlan_id;
4403 nfo.ipv4 = ipv4;
4404 nfo.qh_qpid = 1;
4405
4406 /* Disable or enable qhash for listeners */
4407 spin_lock_irqsave(&cm_core->listen_list_lock, flags);
4408 list_for_each_entry (listen_node, &cm_core->listen_list, list) {
4409 if (vlan_id != listen_node->vlan_id ||
4410 (memcmp(listen_node->loc_addr, ipaddr, ipv4 ? 4 : 16) &&
4411 memcmp(listen_node->loc_addr, ip_zero, ipv4 ? 4 : 16)))
4412 continue;
4413
4414 memcpy(nfo.loc_addr, listen_node->loc_addr,
4415 sizeof(nfo.loc_addr));
4416 nfo.loc_port = listen_node->loc_port;
4417 nfo.user_pri = listen_node->user_pri;
4418 if (!list_empty(&listen_node->child_listen_list)) {
4419 irdma_qhash_ctrl(iwdev, listen_node, &nfo, ipaddr, ipv4,
4420 ifup);
4421 } else if (memcmp(listen_node->loc_addr, ip_zero,
4422 ipv4 ? 4 : 16)) {
4423 if (!irdma_manage_qhash(iwdev, &nfo,
4424 IRDMA_QHASH_TYPE_TCP_SYN, op,
4425 NULL, false))
4426 listen_node->qhash_set = ifup;
4427 }
4428 }
4429 spin_unlock_irqrestore(&cm_core->listen_list_lock, flags);
4430
4431 /* disconnect any connected qp's on ifdown */
4432 if (!ifup)
4433 irdma_cm_teardown_connections(iwdev, ipaddr, &nfo, false);
4434 }
4435