1 /*******************************************************************************
3 * Copyright (c) 2015-2016 Intel Corporation. All rights reserved.
5 * This software is available to you under a choice of one of two
6 * licenses. You may choose to be licensed under the terms of the GNU
7 * General Public License (GPL) Version 2, available from the file
8 * COPYING in the main directory of this source tree, or the
9 * OpenFabrics.org BSD license below:
11 * Redistribution and use in source and binary forms, with or
12 * without modification, are permitted provided that the following
15 * - Redistributions of source code must retain the above
16 * copyright notice, this list of conditions and the following
19 * - Redistributions in binary form must reproduce the above
20 * copyright notice, this list of conditions and the following
21 * disclaimer in the documentation and/or other materials
22 * provided with the distribution.
24 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
25 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
26 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
27 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
28 * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
29 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
30 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
33 *******************************************************************************/
35 #include <linux/atomic.h>
37 #include <linux/tcp.h>
38 #include <linux/init.h>
39 #include <linux/if_arp.h>
40 #include <linux/if_vlan.h>
41 #include <linux/notifier.h>
42 #include <linux/net.h>
43 #include <linux/types.h>
44 #include <linux/timer.h>
45 #include <linux/time.h>
46 #include <linux/delay.h>
47 #include <linux/etherdevice.h>
48 #include <linux/netdevice.h>
49 #include <linux/random.h>
50 #include <linux/list.h>
51 #include <linux/threads.h>
52 #include <linux/highmem.h>
54 #include <net/ndisc.h>
55 #include <net/neighbour.h>
56 #include <net/route.h>
57 #include <net/addrconf.h>
58 #include <net/ip6_route.h>
59 #include <net/ip_fib.h>
60 #include <net/secure_seq.h>
62 #include <asm/checksum.h>
66 static void i40iw_rem_ref_cm_node(struct i40iw_cm_node *);
67 static void i40iw_cm_post_event(struct i40iw_cm_event *event);
68 static void i40iw_disconnect_worker(struct work_struct *work);
71 * i40iw_free_sqbuf - put back puda buffer if refcount = 0
72 * @vsi: pointer to vsi structure
73 * @buf: puda buffer to free
75 void i40iw_free_sqbuf(struct i40iw_sc_vsi *vsi, void *bufp)
77 struct i40iw_puda_buf *buf = (struct i40iw_puda_buf *)bufp;
78 struct i40iw_puda_rsrc *ilq = vsi->ilq;
80 if (!atomic_dec_return(&buf->refcount))
81 i40iw_puda_ret_bufpool(ilq, buf);
85 * i40iw_derive_hw_ird_setting - Calculate IRD
87 * @cm_ird: IRD of connection's node
89 * The ird from the connection is rounded to a supported HW
90 * setting (2,8,32,64) and then encoded for ird_size field of
93 static u8 i40iw_derive_hw_ird_setting(u16 cm_ird)
97 /* ird_size field is encoded in qp_ctx */
98 switch (cm_ird ? roundup_pow_of_two(cm_ird) : 0) {
99 case I40IW_HW_IRD_SETTING_64:
100 encoded_ird_size = 3;
102 case I40IW_HW_IRD_SETTING_32:
103 case I40IW_HW_IRD_SETTING_16:
104 encoded_ird_size = 2;
106 case I40IW_HW_IRD_SETTING_8:
107 case I40IW_HW_IRD_SETTING_4:
108 encoded_ird_size = 1;
110 case I40IW_HW_IRD_SETTING_2:
112 encoded_ird_size = 0;
115 return encoded_ird_size;
119 * i40iw_record_ird_ord - Record IRD/ORD passed in
120 * @cm_node: connection's node
121 * @conn_ird: connection IRD
122 * @conn_ord: connection ORD
124 static void i40iw_record_ird_ord(struct i40iw_cm_node *cm_node, u32 conn_ird,
127 if (conn_ird > I40IW_MAX_IRD_SIZE)
128 conn_ird = I40IW_MAX_IRD_SIZE;
130 if (conn_ord > I40IW_MAX_ORD_SIZE)
131 conn_ord = I40IW_MAX_ORD_SIZE;
132 else if (!conn_ord && cm_node->send_rdma0_op == SEND_RDMA_READ_ZERO)
135 cm_node->ird_size = conn_ird;
136 cm_node->ord_size = conn_ord;
140 * i40iw_copy_ip_ntohl - change network to host ip
144 void i40iw_copy_ip_ntohl(u32 *dst, __be32 *src)
146 *dst++ = ntohl(*src++);
147 *dst++ = ntohl(*src++);
148 *dst++ = ntohl(*src++);
153 * i40iw_copy_ip_htonl - change host addr to network ip
155 * @src: little endian
157 static inline void i40iw_copy_ip_htonl(__be32 *dst, u32 *src)
159 *dst++ = htonl(*src++);
160 *dst++ = htonl(*src++);
161 *dst++ = htonl(*src++);
166 * i40iw_fill_sockaddr4 - get addr info for passive connection
167 * @cm_node: connection's node
168 * @event: upper layer's cm event
170 static inline void i40iw_fill_sockaddr4(struct i40iw_cm_node *cm_node,
171 struct iw_cm_event *event)
173 struct sockaddr_in *laddr = (struct sockaddr_in *)&event->local_addr;
174 struct sockaddr_in *raddr = (struct sockaddr_in *)&event->remote_addr;
176 laddr->sin_family = AF_INET;
177 raddr->sin_family = AF_INET;
179 laddr->sin_port = htons(cm_node->loc_port);
180 raddr->sin_port = htons(cm_node->rem_port);
182 laddr->sin_addr.s_addr = htonl(cm_node->loc_addr[0]);
183 raddr->sin_addr.s_addr = htonl(cm_node->rem_addr[0]);
187 * i40iw_fill_sockaddr6 - get ipv6 addr info for passive side
188 * @cm_node: connection's node
189 * @event: upper layer's cm event
191 static inline void i40iw_fill_sockaddr6(struct i40iw_cm_node *cm_node,
192 struct iw_cm_event *event)
194 struct sockaddr_in6 *laddr6 = (struct sockaddr_in6 *)&event->local_addr;
195 struct sockaddr_in6 *raddr6 = (struct sockaddr_in6 *)&event->remote_addr;
197 laddr6->sin6_family = AF_INET6;
198 raddr6->sin6_family = AF_INET6;
200 laddr6->sin6_port = htons(cm_node->loc_port);
201 raddr6->sin6_port = htons(cm_node->rem_port);
203 i40iw_copy_ip_htonl(laddr6->sin6_addr.in6_u.u6_addr32,
205 i40iw_copy_ip_htonl(raddr6->sin6_addr.in6_u.u6_addr32,
210 * i40iw_get_addr_info
211 * @cm_node: contains ip/tcp info
212 * @cm_info: to get a copy of the cm_node ip/tcp info
214 static void i40iw_get_addr_info(struct i40iw_cm_node *cm_node,
215 struct i40iw_cm_info *cm_info)
217 cm_info->ipv4 = cm_node->ipv4;
218 cm_info->vlan_id = cm_node->vlan_id;
219 memcpy(cm_info->loc_addr, cm_node->loc_addr, sizeof(cm_info->loc_addr));
220 memcpy(cm_info->rem_addr, cm_node->rem_addr, sizeof(cm_info->rem_addr));
221 cm_info->loc_port = cm_node->loc_port;
222 cm_info->rem_port = cm_node->rem_port;
223 cm_info->user_pri = cm_node->user_pri;
227 * i40iw_get_cmevent_info - for cm event upcall
228 * @cm_node: connection's node
229 * @cm_id: upper layers cm struct for the event
230 * @event: upper layer's cm event
232 static inline void i40iw_get_cmevent_info(struct i40iw_cm_node *cm_node,
233 struct iw_cm_id *cm_id,
234 struct iw_cm_event *event)
236 memcpy(&event->local_addr, &cm_id->m_local_addr,
237 sizeof(event->local_addr));
238 memcpy(&event->remote_addr, &cm_id->m_remote_addr,
239 sizeof(event->remote_addr));
241 event->private_data = (void *)cm_node->pdata_buf;
242 event->private_data_len = (u8)cm_node->pdata.size;
243 event->ird = cm_node->ird_size;
244 event->ord = cm_node->ord_size;
249 * i40iw_send_cm_event - upcall cm's event handler
250 * @cm_node: connection's node
251 * @cm_id: upper layer's cm info struct
252 * @type: Event type to indicate
253 * @status: status for the event type
255 static int i40iw_send_cm_event(struct i40iw_cm_node *cm_node,
256 struct iw_cm_id *cm_id,
257 enum iw_cm_event_type type,
260 struct iw_cm_event event;
262 memset(&event, 0, sizeof(event));
264 event.status = status;
266 case IW_CM_EVENT_CONNECT_REQUEST:
268 i40iw_fill_sockaddr4(cm_node, &event);
270 i40iw_fill_sockaddr6(cm_node, &event);
271 event.provider_data = (void *)cm_node;
272 event.private_data = (void *)cm_node->pdata_buf;
273 event.private_data_len = (u8)cm_node->pdata.size;
274 event.ird = cm_node->ird_size;
276 case IW_CM_EVENT_CONNECT_REPLY:
277 i40iw_get_cmevent_info(cm_node, cm_id, &event);
279 case IW_CM_EVENT_ESTABLISHED:
280 event.ird = cm_node->ird_size;
281 event.ord = cm_node->ord_size;
283 case IW_CM_EVENT_DISCONNECT:
285 case IW_CM_EVENT_CLOSE:
288 i40iw_pr_err("event type received type = %d\n", type);
291 return cm_id->event_handler(cm_id, &event);
295 * i40iw_create_event - create cm event
296 * @cm_node: connection's node
297 * @type: Event type to generate
299 static struct i40iw_cm_event *i40iw_create_event(struct i40iw_cm_node *cm_node,
300 enum i40iw_cm_event_type type)
302 struct i40iw_cm_event *event;
307 event = kzalloc(sizeof(*event), GFP_ATOMIC);
313 event->cm_node = cm_node;
314 memcpy(event->cm_info.rem_addr, cm_node->rem_addr, sizeof(event->cm_info.rem_addr));
315 memcpy(event->cm_info.loc_addr, cm_node->loc_addr, sizeof(event->cm_info.loc_addr));
316 event->cm_info.rem_port = cm_node->rem_port;
317 event->cm_info.loc_port = cm_node->loc_port;
318 event->cm_info.cm_id = cm_node->cm_id;
320 i40iw_debug(cm_node->dev,
322 "node=%p event=%p type=%u dst=%pI4 src=%pI4\n",
326 event->cm_info.loc_addr,
327 event->cm_info.rem_addr);
329 i40iw_cm_post_event(event);
334 * i40iw_free_retrans_entry - free send entry
335 * @cm_node: connection's node
337 static void i40iw_free_retrans_entry(struct i40iw_cm_node *cm_node)
339 struct i40iw_device *iwdev = cm_node->iwdev;
340 struct i40iw_timer_entry *send_entry;
342 send_entry = cm_node->send_entry;
344 cm_node->send_entry = NULL;
345 i40iw_free_sqbuf(&iwdev->vsi, (void *)send_entry->sqbuf);
347 atomic_dec(&cm_node->ref_count);
352 * i40iw_cleanup_retrans_entry - free send entry with lock
353 * @cm_node: connection's node
355 static void i40iw_cleanup_retrans_entry(struct i40iw_cm_node *cm_node)
359 spin_lock_irqsave(&cm_node->retrans_list_lock, flags);
360 i40iw_free_retrans_entry(cm_node);
361 spin_unlock_irqrestore(&cm_node->retrans_list_lock, flags);
365 * i40iw_form_cm_frame - get a free packet and build frame
366 * @cm_node: connection's node ionfo to use in frame
367 * @options: pointer to options info
368 * @hdr: pointer mpa header
369 * @pdata: pointer to private data
370 * @flags: indicates FIN or ACK
372 static struct i40iw_puda_buf *i40iw_form_cm_frame(struct i40iw_cm_node *cm_node,
373 struct i40iw_kmem_info *options,
374 struct i40iw_kmem_info *hdr,
375 struct i40iw_kmem_info *pdata,
378 struct i40iw_puda_buf *sqbuf;
379 struct i40iw_sc_vsi *vsi = &cm_node->iwdev->vsi;
384 struct ipv6hdr *ip6h;
387 u16 eth_hlen = ETH_HLEN;
393 sqbuf = i40iw_puda_get_bufpool(vsi->ilq);
399 opts_len = (u32)options->size;
405 pd_len = pdata->size;
407 if (cm_node->vlan_id < VLAN_TAG_PRESENT)
411 packetsize = sizeof(*iph) + sizeof(*tcph);
413 packetsize = sizeof(*ip6h) + sizeof(*tcph);
414 packetsize += opts_len + hdr_len + pd_len;
416 memset(buf, 0x00, eth_hlen + packetsize);
418 sqbuf->totallen = packetsize + eth_hlen;
419 sqbuf->maclen = eth_hlen;
420 sqbuf->tcphlen = sizeof(*tcph) + opts_len;
421 sqbuf->scratch = (void *)cm_node;
423 ethh = (struct ethhdr *)buf;
429 iph = (struct iphdr *)buf;
431 tcph = (struct tcphdr *)buf;
432 buf += sizeof(*tcph);
434 ether_addr_copy(ethh->h_dest, cm_node->rem_mac);
435 ether_addr_copy(ethh->h_source, cm_node->loc_mac);
436 if (cm_node->vlan_id < VLAN_TAG_PRESENT) {
437 ((struct vlan_ethhdr *)ethh)->h_vlan_proto = htons(ETH_P_8021Q);
438 vtag = (cm_node->user_pri << VLAN_PRIO_SHIFT) | cm_node->vlan_id;
439 ((struct vlan_ethhdr *)ethh)->h_vlan_TCI = htons(vtag);
441 ((struct vlan_ethhdr *)ethh)->h_vlan_encapsulated_proto = htons(ETH_P_IP);
443 ethh->h_proto = htons(ETH_P_IP);
446 iph->version = IPVERSION;
447 iph->ihl = 5; /* 5 * 4Byte words, IP headr len */
448 iph->tos = cm_node->tos;
449 iph->tot_len = htons(packetsize);
450 iph->id = htons(++cm_node->tcp_cntxt.loc_id);
452 iph->frag_off = htons(0x4000);
454 iph->protocol = IPPROTO_TCP;
455 iph->saddr = htonl(cm_node->loc_addr[0]);
456 iph->daddr = htonl(cm_node->rem_addr[0]);
459 ip6h = (struct ipv6hdr *)buf;
460 buf += sizeof(*ip6h);
461 tcph = (struct tcphdr *)buf;
462 buf += sizeof(*tcph);
464 ether_addr_copy(ethh->h_dest, cm_node->rem_mac);
465 ether_addr_copy(ethh->h_source, cm_node->loc_mac);
466 if (cm_node->vlan_id < VLAN_TAG_PRESENT) {
467 ((struct vlan_ethhdr *)ethh)->h_vlan_proto = htons(ETH_P_8021Q);
468 vtag = (cm_node->user_pri << VLAN_PRIO_SHIFT) | cm_node->vlan_id;
469 ((struct vlan_ethhdr *)ethh)->h_vlan_TCI = htons(vtag);
470 ((struct vlan_ethhdr *)ethh)->h_vlan_encapsulated_proto = htons(ETH_P_IPV6);
472 ethh->h_proto = htons(ETH_P_IPV6);
475 ip6h->priority = cm_node->tos >> 4;
476 ip6h->flow_lbl[0] = cm_node->tos << 4;
477 ip6h->flow_lbl[1] = 0;
478 ip6h->flow_lbl[2] = 0;
479 ip6h->payload_len = htons(packetsize - sizeof(*ip6h));
481 ip6h->hop_limit = 128;
482 i40iw_copy_ip_htonl(ip6h->saddr.in6_u.u6_addr32,
484 i40iw_copy_ip_htonl(ip6h->daddr.in6_u.u6_addr32,
488 tcph->source = htons(cm_node->loc_port);
489 tcph->dest = htons(cm_node->rem_port);
491 tcph->seq = htonl(cm_node->tcp_cntxt.loc_seq_num);
493 if (flags & SET_ACK) {
494 cm_node->tcp_cntxt.loc_ack_num = cm_node->tcp_cntxt.rcv_nxt;
495 tcph->ack_seq = htonl(cm_node->tcp_cntxt.loc_ack_num);
501 if (flags & SET_SYN) {
502 cm_node->tcp_cntxt.loc_seq_num++;
505 cm_node->tcp_cntxt.loc_seq_num += hdr_len + pd_len;
508 if (flags & SET_FIN) {
509 cm_node->tcp_cntxt.loc_seq_num++;
516 tcph->doff = (u16)((sizeof(*tcph) + opts_len + 3) >> 2);
517 sqbuf->tcphlen = tcph->doff << 2;
518 tcph->window = htons(cm_node->tcp_cntxt.rcv_wnd);
522 memcpy(buf, options->addr, opts_len);
527 memcpy(buf, hdr->addr, hdr_len);
531 if (pdata && pdata->addr)
532 memcpy(buf, pdata->addr, pdata->size);
534 atomic_set(&sqbuf->refcount, 1);
540 * i40iw_send_reset - Send RST packet
541 * @cm_node: connection's node
543 int i40iw_send_reset(struct i40iw_cm_node *cm_node)
545 struct i40iw_puda_buf *sqbuf;
546 int flags = SET_RST | SET_ACK;
548 sqbuf = i40iw_form_cm_frame(cm_node, NULL, NULL, NULL, flags);
550 i40iw_pr_err("no sqbuf\n");
554 return i40iw_schedule_cm_timer(cm_node, sqbuf, I40IW_TIMER_TYPE_SEND, 0, 1);
558 * i40iw_active_open_err - send event for active side cm error
559 * @cm_node: connection's node
560 * @reset: Flag to send reset or not
562 static void i40iw_active_open_err(struct i40iw_cm_node *cm_node, bool reset)
564 i40iw_cleanup_retrans_entry(cm_node);
565 cm_node->cm_core->stats_connect_errs++;
567 i40iw_debug(cm_node->dev,
569 "%s cm_node=%p state=%d\n",
573 atomic_inc(&cm_node->ref_count);
574 i40iw_send_reset(cm_node);
577 cm_node->state = I40IW_CM_STATE_CLOSED;
578 i40iw_create_event(cm_node, I40IW_CM_EVENT_ABORTED);
582 * i40iw_passive_open_err - handle passive side cm error
583 * @cm_node: connection's node
584 * @reset: send reset or just free cm_node
586 static void i40iw_passive_open_err(struct i40iw_cm_node *cm_node, bool reset)
588 i40iw_cleanup_retrans_entry(cm_node);
589 cm_node->cm_core->stats_passive_errs++;
590 cm_node->state = I40IW_CM_STATE_CLOSED;
591 i40iw_debug(cm_node->dev,
593 "%s cm_node=%p state =%d\n",
598 i40iw_send_reset(cm_node);
600 i40iw_rem_ref_cm_node(cm_node);
604 * i40iw_event_connect_error - to create connect error event
605 * @event: cm information for connect event
607 static void i40iw_event_connect_error(struct i40iw_cm_event *event)
609 struct i40iw_qp *iwqp;
610 struct iw_cm_id *cm_id;
612 cm_id = event->cm_node->cm_id;
616 iwqp = cm_id->provider_data;
618 if (!iwqp || !iwqp->iwdev)
622 cm_id->provider_data = NULL;
623 i40iw_send_cm_event(event->cm_node, cm_id,
624 IW_CM_EVENT_CONNECT_REPLY,
626 cm_id->rem_ref(cm_id);
627 i40iw_rem_ref_cm_node(event->cm_node);
631 * i40iw_process_options
632 * @cm_node: connection's node
633 * @optionsloc: point to start of options
634 * @optionsize: size of all options
635 * @syn_packet: flag if syn packet
637 static int i40iw_process_options(struct i40iw_cm_node *cm_node,
644 union all_known_options *all_options;
645 char got_mss_option = 0;
647 while (offset < optionsize) {
648 all_options = (union all_known_options *)(optionsloc + offset);
649 switch (all_options->as_base.optionnum) {
650 case OPTION_NUMBER_END:
653 case OPTION_NUMBER_NONE:
656 case OPTION_NUMBER_MSS:
657 i40iw_debug(cm_node->dev,
659 "%s: MSS Length: %d Offset: %d Size: %d\n",
661 all_options->as_mss.length,
665 if (all_options->as_mss.length != 4)
667 tmp = ntohs(all_options->as_mss.mss);
668 if (tmp > 0 && tmp < cm_node->tcp_cntxt.mss)
669 cm_node->tcp_cntxt.mss = tmp;
671 case OPTION_NUMBER_WINDOW_SCALE:
672 cm_node->tcp_cntxt.snd_wscale =
673 all_options->as_windowscale.shiftcount;
676 i40iw_debug(cm_node->dev,
678 "TCP Option not understood: %x\n",
679 all_options->as_base.optionnum);
682 offset += all_options->as_base.length;
684 if (!got_mss_option && syn_packet)
685 cm_node->tcp_cntxt.mss = I40IW_CM_DEFAULT_MSS;
690 * i40iw_handle_tcp_options -
691 * @cm_node: connection's node
692 * @tcph: pointer tcp header
693 * @optionsize: size of options rcvd
694 * @passive: active or passive flag
696 static int i40iw_handle_tcp_options(struct i40iw_cm_node *cm_node,
701 u8 *optionsloc = (u8 *)&tcph[1];
704 if (i40iw_process_options(cm_node,
708 i40iw_debug(cm_node->dev,
710 "%s: Node %p, Sending RESET\n",
714 i40iw_passive_open_err(cm_node, true);
716 i40iw_active_open_err(cm_node, true);
721 cm_node->tcp_cntxt.snd_wnd = ntohs(tcph->window) <<
722 cm_node->tcp_cntxt.snd_wscale;
724 if (cm_node->tcp_cntxt.snd_wnd > cm_node->tcp_cntxt.max_snd_wnd)
725 cm_node->tcp_cntxt.max_snd_wnd = cm_node->tcp_cntxt.snd_wnd;
730 * i40iw_build_mpa_v1 - build a MPA V1 frame
731 * @cm_node: connection's node
732 * @mpa_key: to do read0 or write0
734 static void i40iw_build_mpa_v1(struct i40iw_cm_node *cm_node,
738 struct ietf_mpa_v1 *mpa_frame = (struct ietf_mpa_v1 *)start_addr;
741 case MPA_KEY_REQUEST:
742 memcpy(mpa_frame->key, IEFT_MPA_KEY_REQ, IETF_MPA_KEY_SIZE);
745 memcpy(mpa_frame->key, IEFT_MPA_KEY_REP, IETF_MPA_KEY_SIZE);
750 mpa_frame->flags = IETF_MPA_FLAGS_CRC;
751 mpa_frame->rev = cm_node->mpa_frame_rev;
752 mpa_frame->priv_data_len = htons(cm_node->pdata.size);
756 * i40iw_build_mpa_v2 - build a MPA V2 frame
757 * @cm_node: connection's node
758 * @start_addr: buffer start address
759 * @mpa_key: to do read0 or write0
761 static void i40iw_build_mpa_v2(struct i40iw_cm_node *cm_node,
765 struct ietf_mpa_v2 *mpa_frame = (struct ietf_mpa_v2 *)start_addr;
766 struct ietf_rtr_msg *rtr_msg = &mpa_frame->rtr_msg;
767 u16 ctrl_ird, ctrl_ord;
769 /* initialize the upper 5 bytes of the frame */
770 i40iw_build_mpa_v1(cm_node, start_addr, mpa_key);
771 mpa_frame->flags |= IETF_MPA_V2_FLAG;
772 mpa_frame->priv_data_len += htons(IETF_RTR_MSG_SIZE);
774 /* initialize RTR msg */
775 if (cm_node->mpav2_ird_ord == IETF_NO_IRD_ORD) {
776 ctrl_ird = IETF_NO_IRD_ORD;
777 ctrl_ord = IETF_NO_IRD_ORD;
779 ctrl_ird = (cm_node->ird_size > IETF_NO_IRD_ORD) ?
780 IETF_NO_IRD_ORD : cm_node->ird_size;
781 ctrl_ord = (cm_node->ord_size > IETF_NO_IRD_ORD) ?
782 IETF_NO_IRD_ORD : cm_node->ord_size;
785 ctrl_ird |= IETF_PEER_TO_PEER;
788 case MPA_KEY_REQUEST:
789 ctrl_ord |= IETF_RDMA0_WRITE;
790 ctrl_ord |= IETF_RDMA0_READ;
793 switch (cm_node->send_rdma0_op) {
794 case SEND_RDMA_WRITE_ZERO:
795 ctrl_ord |= IETF_RDMA0_WRITE;
797 case SEND_RDMA_READ_ZERO:
798 ctrl_ord |= IETF_RDMA0_READ;
805 rtr_msg->ctrl_ird = htons(ctrl_ird);
806 rtr_msg->ctrl_ord = htons(ctrl_ord);
810 * i40iw_cm_build_mpa_frame - build mpa frame for mpa version 1 or version 2
811 * @cm_node: connection's node
812 * @mpa: mpa: data buffer
813 * @mpa_key: to do read0 or write0
815 static int i40iw_cm_build_mpa_frame(struct i40iw_cm_node *cm_node,
816 struct i40iw_kmem_info *mpa,
821 switch (cm_node->mpa_frame_rev) {
823 hdr_len = sizeof(struct ietf_mpa_v1);
824 i40iw_build_mpa_v1(cm_node, mpa->addr, mpa_key);
827 hdr_len = sizeof(struct ietf_mpa_v2);
828 i40iw_build_mpa_v2(cm_node, mpa->addr, mpa_key);
838 * i40iw_send_mpa_request - active node send mpa request to passive node
839 * @cm_node: connection's node
841 static int i40iw_send_mpa_request(struct i40iw_cm_node *cm_node)
843 struct i40iw_puda_buf *sqbuf;
846 i40iw_pr_err("cm_node == NULL\n");
850 cm_node->mpa_hdr.addr = &cm_node->mpa_frame;
851 cm_node->mpa_hdr.size = i40iw_cm_build_mpa_frame(cm_node,
854 if (!cm_node->mpa_hdr.size) {
855 i40iw_pr_err("mpa size = %d\n", cm_node->mpa_hdr.size);
859 sqbuf = i40iw_form_cm_frame(cm_node,
865 i40iw_pr_err("sq_buf == NULL\n");
868 return i40iw_schedule_cm_timer(cm_node, sqbuf, I40IW_TIMER_TYPE_SEND, 1, 0);
872 * i40iw_send_mpa_reject -
873 * @cm_node: connection's node
874 * @pdata: reject data for connection
875 * @plen: length of reject data
877 static int i40iw_send_mpa_reject(struct i40iw_cm_node *cm_node,
881 struct i40iw_puda_buf *sqbuf;
882 struct i40iw_kmem_info priv_info;
884 cm_node->mpa_hdr.addr = &cm_node->mpa_frame;
885 cm_node->mpa_hdr.size = i40iw_cm_build_mpa_frame(cm_node,
889 cm_node->mpa_frame.flags |= IETF_MPA_FLAGS_REJECT;
890 priv_info.addr = (void *)pdata;
891 priv_info.size = plen;
893 sqbuf = i40iw_form_cm_frame(cm_node,
899 i40iw_pr_err("no sqbuf\n");
902 cm_node->state = I40IW_CM_STATE_FIN_WAIT1;
903 return i40iw_schedule_cm_timer(cm_node, sqbuf, I40IW_TIMER_TYPE_SEND, 1, 0);
907 * recv_mpa - process an IETF MPA frame
908 * @cm_node: connection's node
909 * @buffer: Data pointer
910 * @type: to return accept or reject
911 * @len: Len of mpa buffer
913 static int i40iw_parse_mpa(struct i40iw_cm_node *cm_node, u8 *buffer, u32 *type, u32 len)
915 struct ietf_mpa_v1 *mpa_frame;
916 struct ietf_mpa_v2 *mpa_v2_frame;
917 struct ietf_rtr_msg *rtr_msg;
921 *type = I40IW_MPA_REQUEST_ACCEPT;
923 if (len < sizeof(struct ietf_mpa_v1)) {
924 i40iw_pr_err("ietf buffer small (%x)\n", len);
928 mpa_frame = (struct ietf_mpa_v1 *)buffer;
929 mpa_hdr_len = sizeof(struct ietf_mpa_v1);
930 priv_data_len = ntohs(mpa_frame->priv_data_len);
932 if (priv_data_len > IETF_MAX_PRIV_DATA_LEN) {
933 i40iw_pr_err("large pri_data %d\n", priv_data_len);
936 if (mpa_frame->rev != IETF_MPA_V1 && mpa_frame->rev != IETF_MPA_V2) {
937 i40iw_pr_err("unsupported mpa rev = %d\n", mpa_frame->rev);
940 if (mpa_frame->rev > cm_node->mpa_frame_rev) {
941 i40iw_pr_err("rev %d\n", mpa_frame->rev);
944 cm_node->mpa_frame_rev = mpa_frame->rev;
946 if (cm_node->state != I40IW_CM_STATE_MPAREQ_SENT) {
947 if (memcmp(mpa_frame->key, IEFT_MPA_KEY_REQ, IETF_MPA_KEY_SIZE)) {
948 i40iw_pr_err("Unexpected MPA Key received\n");
952 if (memcmp(mpa_frame->key, IEFT_MPA_KEY_REP, IETF_MPA_KEY_SIZE)) {
953 i40iw_pr_err("Unexpected MPA Key received\n");
958 if (priv_data_len + mpa_hdr_len > len) {
959 i40iw_pr_err("ietf buffer len(%x + %x != %x)\n",
960 priv_data_len, mpa_hdr_len, len);
963 if (len > MAX_CM_BUFFER) {
964 i40iw_pr_err("ietf buffer large len = %d\n", len);
968 switch (mpa_frame->rev) {
975 mpa_v2_frame = (struct ietf_mpa_v2 *)buffer;
976 mpa_hdr_len += IETF_RTR_MSG_SIZE;
977 rtr_msg = &mpa_v2_frame->rtr_msg;
979 /* parse rtr message */
980 ctrl_ord = ntohs(rtr_msg->ctrl_ord);
981 ctrl_ird = ntohs(rtr_msg->ctrl_ird);
982 ird_size = ctrl_ird & IETF_NO_IRD_ORD;
983 ord_size = ctrl_ord & IETF_NO_IRD_ORD;
985 if (!(ctrl_ird & IETF_PEER_TO_PEER))
988 if (ird_size == IETF_NO_IRD_ORD || ord_size == IETF_NO_IRD_ORD) {
989 cm_node->mpav2_ird_ord = IETF_NO_IRD_ORD;
993 if (cm_node->state != I40IW_CM_STATE_MPAREQ_SENT) {
995 if (!ord_size && (ctrl_ord & IETF_RDMA0_READ))
996 cm_node->ird_size = 1;
997 if (cm_node->ord_size > ird_size)
998 cm_node->ord_size = ird_size;
1001 if (!ird_size && (ctrl_ord & IETF_RDMA0_READ))
1003 if (cm_node->ord_size > ird_size)
1004 cm_node->ord_size = ird_size;
1006 if (cm_node->ird_size < ord_size)
1007 /* no resources available */
1012 if (ctrl_ord & IETF_RDMA0_READ)
1013 cm_node->send_rdma0_op = SEND_RDMA_READ_ZERO;
1014 else if (ctrl_ord & IETF_RDMA0_WRITE)
1015 cm_node->send_rdma0_op = SEND_RDMA_WRITE_ZERO;
1016 else /* Not supported RDMA0 operation */
1018 i40iw_debug(cm_node->dev, I40IW_DEBUG_CM,
1019 "MPAV2: Negotiated ORD: %d, IRD: %d\n",
1020 cm_node->ord_size, cm_node->ird_size);
1029 memcpy(cm_node->pdata_buf, buffer + mpa_hdr_len, priv_data_len);
1030 cm_node->pdata.size = priv_data_len;
1032 if (mpa_frame->flags & IETF_MPA_FLAGS_REJECT)
1033 *type = I40IW_MPA_REQUEST_REJECT;
1035 if (mpa_frame->flags & IETF_MPA_FLAGS_MARKERS)
1036 cm_node->snd_mark_en = true;
1042 * i40iw_schedule_cm_timer
1043 * @@cm_node: connection's node
1044 * @sqbuf: buffer to send
1045 * @type: if it is send or close
1046 * @send_retrans: if rexmits to be done
1047 * @close_when_complete: is cm_node to be removed
1049 * note - cm_node needs to be protected before calling this. Encase in:
1050 * i40iw_rem_ref_cm_node(cm_core, cm_node);
1051 * i40iw_schedule_cm_timer(...)
1052 * atomic_inc(&cm_node->ref_count);
1054 int i40iw_schedule_cm_timer(struct i40iw_cm_node *cm_node,
1055 struct i40iw_puda_buf *sqbuf,
1056 enum i40iw_timer_type type,
1058 int close_when_complete)
1060 struct i40iw_sc_vsi *vsi = &cm_node->iwdev->vsi;
1061 struct i40iw_cm_core *cm_core = cm_node->cm_core;
1062 struct i40iw_timer_entry *new_send;
1065 unsigned long flags;
1067 new_send = kzalloc(sizeof(*new_send), GFP_ATOMIC);
1069 if (type != I40IW_TIMER_TYPE_CLOSE)
1070 i40iw_free_sqbuf(vsi, (void *)sqbuf);
1073 new_send->retrycount = I40IW_DEFAULT_RETRYS;
1074 new_send->retranscount = I40IW_DEFAULT_RETRANS;
1075 new_send->sqbuf = sqbuf;
1076 new_send->timetosend = jiffies;
1077 new_send->type = type;
1078 new_send->send_retrans = send_retrans;
1079 new_send->close_when_complete = close_when_complete;
1081 if (type == I40IW_TIMER_TYPE_CLOSE) {
1082 new_send->timetosend += (HZ / 10);
1083 if (cm_node->close_entry) {
1085 i40iw_pr_err("already close entry\n");
1088 cm_node->close_entry = new_send;
1091 if (type == I40IW_TIMER_TYPE_SEND) {
1092 spin_lock_irqsave(&cm_node->retrans_list_lock, flags);
1093 cm_node->send_entry = new_send;
1094 atomic_inc(&cm_node->ref_count);
1095 spin_unlock_irqrestore(&cm_node->retrans_list_lock, flags);
1096 new_send->timetosend = jiffies + I40IW_RETRY_TIMEOUT;
1098 atomic_inc(&sqbuf->refcount);
1099 i40iw_puda_send_buf(vsi->ilq, sqbuf);
1100 if (!send_retrans) {
1101 i40iw_cleanup_retrans_entry(cm_node);
1102 if (close_when_complete)
1103 i40iw_rem_ref_cm_node(cm_node);
1108 spin_lock_irqsave(&cm_core->ht_lock, flags);
1109 was_timer_set = timer_pending(&cm_core->tcp_timer);
1111 if (!was_timer_set) {
1112 cm_core->tcp_timer.expires = new_send->timetosend;
1113 add_timer(&cm_core->tcp_timer);
1115 spin_unlock_irqrestore(&cm_core->ht_lock, flags);
1121 * i40iw_retrans_expired - Could not rexmit the packet
1122 * @cm_node: connection's node
1124 static void i40iw_retrans_expired(struct i40iw_cm_node *cm_node)
1126 struct iw_cm_id *cm_id = cm_node->cm_id;
1127 enum i40iw_cm_node_state state = cm_node->state;
1129 cm_node->state = I40IW_CM_STATE_CLOSED;
1131 case I40IW_CM_STATE_SYN_RCVD:
1132 case I40IW_CM_STATE_CLOSING:
1133 i40iw_rem_ref_cm_node(cm_node);
1135 case I40IW_CM_STATE_FIN_WAIT1:
1136 case I40IW_CM_STATE_LAST_ACK:
1138 cm_id->rem_ref(cm_id);
1139 i40iw_send_reset(cm_node);
1142 atomic_inc(&cm_node->ref_count);
1143 i40iw_send_reset(cm_node);
1144 i40iw_create_event(cm_node, I40IW_CM_EVENT_ABORTED);
1150 * i40iw_handle_close_entry - for handling retry/timeouts
1151 * @cm_node: connection's node
1152 * @rem_node: flag for remove cm_node
1154 static void i40iw_handle_close_entry(struct i40iw_cm_node *cm_node, u32 rem_node)
1156 struct i40iw_timer_entry *close_entry = cm_node->close_entry;
1157 struct iw_cm_id *cm_id = cm_node->cm_id;
1158 struct i40iw_qp *iwqp;
1159 unsigned long flags;
1163 iwqp = (struct i40iw_qp *)close_entry->sqbuf;
1165 spin_lock_irqsave(&iwqp->lock, flags);
1167 iwqp->hw_tcp_state = I40IW_TCP_STATE_CLOSED;
1168 iwqp->hw_iwarp_state = I40IW_QP_STATE_ERROR;
1169 iwqp->last_aeq = I40IW_AE_RESET_SENT;
1170 iwqp->ibqp_state = IB_QPS_ERR;
1171 spin_unlock_irqrestore(&iwqp->lock, flags);
1172 i40iw_cm_disconn(iwqp);
1174 spin_unlock_irqrestore(&iwqp->lock, flags);
1176 } else if (rem_node) {
1177 /* TIME_WAIT state */
1178 i40iw_rem_ref_cm_node(cm_node);
1181 cm_id->rem_ref(cm_id);
1183 cm_node->close_entry = NULL;
1187 * i40iw_build_timer_list - Add cm_nodes to timer list
1188 * @timer_list: ptr to timer list
1189 * @hte: ptr to accelerated or non-accelerated list
1191 static void i40iw_build_timer_list(struct list_head *timer_list,
1192 struct list_head *hte)
1194 struct i40iw_cm_node *cm_node;
1195 struct list_head *list_core_temp, *list_node;
1197 list_for_each_safe(list_node, list_core_temp, hte) {
1198 cm_node = container_of(list_node, struct i40iw_cm_node, list);
1199 if (cm_node->close_entry || cm_node->send_entry) {
1200 atomic_inc(&cm_node->ref_count);
1201 list_add(&cm_node->timer_entry, timer_list);
1207 * i40iw_cm_timer_tick - system's timer expired callback
1208 * @pass: Pointing to cm_core
1210 static void i40iw_cm_timer_tick(struct timer_list *t)
1212 unsigned long nexttimeout = jiffies + I40IW_LONG_TIME;
1213 struct i40iw_cm_node *cm_node;
1214 struct i40iw_timer_entry *send_entry, *close_entry;
1215 struct list_head *list_core_temp;
1216 struct i40iw_sc_vsi *vsi;
1217 struct list_head *list_node;
1218 struct i40iw_cm_core *cm_core = from_timer(cm_core, t, tcp_timer);
1220 unsigned long timetosend;
1221 unsigned long flags;
1223 struct list_head timer_list;
1225 INIT_LIST_HEAD(&timer_list);
1227 spin_lock_irqsave(&cm_core->ht_lock, flags);
1228 i40iw_build_timer_list(&timer_list, &cm_core->non_accelerated_list);
1229 i40iw_build_timer_list(&timer_list, &cm_core->accelerated_list);
1230 spin_unlock_irqrestore(&cm_core->ht_lock, flags);
1232 list_for_each_safe(list_node, list_core_temp, &timer_list) {
1233 cm_node = container_of(list_node,
1234 struct i40iw_cm_node,
1236 close_entry = cm_node->close_entry;
1239 if (time_after(close_entry->timetosend, jiffies)) {
1240 if (nexttimeout > close_entry->timetosend ||
1242 nexttimeout = close_entry->timetosend;
1246 i40iw_handle_close_entry(cm_node, 1);
1250 spin_lock_irqsave(&cm_node->retrans_list_lock, flags);
1252 send_entry = cm_node->send_entry;
1255 if (time_after(send_entry->timetosend, jiffies)) {
1256 if (cm_node->state != I40IW_CM_STATE_OFFLOADED) {
1257 if ((nexttimeout > send_entry->timetosend) ||
1259 nexttimeout = send_entry->timetosend;
1263 i40iw_free_retrans_entry(cm_node);
1268 if ((cm_node->state == I40IW_CM_STATE_OFFLOADED) ||
1269 (cm_node->state == I40IW_CM_STATE_CLOSED)) {
1270 i40iw_free_retrans_entry(cm_node);
1274 if (!send_entry->retranscount || !send_entry->retrycount) {
1275 i40iw_free_retrans_entry(cm_node);
1277 spin_unlock_irqrestore(&cm_node->retrans_list_lock, flags);
1278 i40iw_retrans_expired(cm_node);
1279 cm_node->state = I40IW_CM_STATE_CLOSED;
1280 spin_lock_irqsave(&cm_node->retrans_list_lock, flags);
1283 spin_unlock_irqrestore(&cm_node->retrans_list_lock, flags);
1285 vsi = &cm_node->iwdev->vsi;
1287 if (!cm_node->ack_rcvd) {
1288 atomic_inc(&send_entry->sqbuf->refcount);
1289 i40iw_puda_send_buf(vsi->ilq, send_entry->sqbuf);
1290 cm_node->cm_core->stats_pkt_retrans++;
1292 spin_lock_irqsave(&cm_node->retrans_list_lock, flags);
1293 if (send_entry->send_retrans) {
1294 send_entry->retranscount--;
1295 timetosend = (I40IW_RETRY_TIMEOUT <<
1296 (I40IW_DEFAULT_RETRANS -
1297 send_entry->retranscount));
1299 send_entry->timetosend = jiffies +
1300 min(timetosend, I40IW_MAX_TIMEOUT);
1301 if (nexttimeout > send_entry->timetosend || !settimer) {
1302 nexttimeout = send_entry->timetosend;
1306 int close_when_complete;
1308 close_when_complete = send_entry->close_when_complete;
1309 i40iw_debug(cm_node->dev,
1311 "cm_node=%p state=%d\n",
1314 i40iw_free_retrans_entry(cm_node);
1315 if (close_when_complete)
1316 i40iw_rem_ref_cm_node(cm_node);
1319 spin_unlock_irqrestore(&cm_node->retrans_list_lock, flags);
1320 i40iw_rem_ref_cm_node(cm_node);
1324 spin_lock_irqsave(&cm_core->ht_lock, flags);
1325 if (!timer_pending(&cm_core->tcp_timer)) {
1326 cm_core->tcp_timer.expires = nexttimeout;
1327 add_timer(&cm_core->tcp_timer);
1329 spin_unlock_irqrestore(&cm_core->ht_lock, flags);
1334 * i40iw_send_syn - send SYN packet
1335 * @cm_node: connection's node
1336 * @sendack: flag to set ACK bit or not
1338 int i40iw_send_syn(struct i40iw_cm_node *cm_node, u32 sendack)
1340 struct i40iw_puda_buf *sqbuf;
1341 int flags = SET_SYN;
1342 char optionsbuffer[sizeof(struct option_mss) +
1343 sizeof(struct option_windowscale) +
1344 sizeof(struct option_base) + TCP_OPTIONS_PADDING];
1345 struct i40iw_kmem_info opts;
1347 int optionssize = 0;
1348 /* Sending MSS option */
1349 union all_known_options *options;
1351 opts.addr = optionsbuffer;
1353 i40iw_pr_err("no cm_node\n");
1357 options = (union all_known_options *)&optionsbuffer[optionssize];
1358 options->as_mss.optionnum = OPTION_NUMBER_MSS;
1359 options->as_mss.length = sizeof(struct option_mss);
1360 options->as_mss.mss = htons(cm_node->tcp_cntxt.mss);
1361 optionssize += sizeof(struct option_mss);
1363 options = (union all_known_options *)&optionsbuffer[optionssize];
1364 options->as_windowscale.optionnum = OPTION_NUMBER_WINDOW_SCALE;
1365 options->as_windowscale.length = sizeof(struct option_windowscale);
1366 options->as_windowscale.shiftcount = cm_node->tcp_cntxt.rcv_wscale;
1367 optionssize += sizeof(struct option_windowscale);
1368 options = (union all_known_options *)&optionsbuffer[optionssize];
1369 options->as_end = OPTION_NUMBER_END;
1375 opts.size = optionssize;
1377 sqbuf = i40iw_form_cm_frame(cm_node, &opts, NULL, NULL, flags);
1379 i40iw_pr_err("no sqbuf\n");
1382 return i40iw_schedule_cm_timer(cm_node, sqbuf, I40IW_TIMER_TYPE_SEND, 1, 0);
1386 * i40iw_send_ack - Send ACK packet
1387 * @cm_node: connection's node
1389 static void i40iw_send_ack(struct i40iw_cm_node *cm_node)
1391 struct i40iw_puda_buf *sqbuf;
1392 struct i40iw_sc_vsi *vsi = &cm_node->iwdev->vsi;
1394 sqbuf = i40iw_form_cm_frame(cm_node, NULL, NULL, NULL, SET_ACK);
1396 i40iw_puda_send_buf(vsi->ilq, sqbuf);
1398 i40iw_pr_err("no sqbuf\n");
1402 * i40iw_send_fin - Send FIN pkt
1403 * @cm_node: connection's node
1405 static int i40iw_send_fin(struct i40iw_cm_node *cm_node)
1407 struct i40iw_puda_buf *sqbuf;
1409 sqbuf = i40iw_form_cm_frame(cm_node, NULL, NULL, NULL, SET_ACK | SET_FIN);
1411 i40iw_pr_err("no sqbuf\n");
1414 return i40iw_schedule_cm_timer(cm_node, sqbuf, I40IW_TIMER_TYPE_SEND, 1, 0);
1418 * i40iw_find_node - find a cm node that matches the reference cm node
1419 * @cm_core: cm's core
1420 * @rem_port: remote tcp port num
1421 * @rem_addr: remote ip addr
1422 * @loc_port: local tcp port num
1423 * @loc_addr: loc ip addr
1424 * @add_refcnt: flag to increment refcount of cm_node
1425 * @accelerated_list: flag for accelerated vs non-accelerated list to search
1427 struct i40iw_cm_node *i40iw_find_node(struct i40iw_cm_core *cm_core,
1433 bool accelerated_list)
1435 struct list_head *hte;
1436 struct i40iw_cm_node *cm_node;
1437 unsigned long flags;
1439 hte = accelerated_list ?
1440 &cm_core->accelerated_list : &cm_core->non_accelerated_list;
1442 /* walk list and find cm_node associated with this session ID */
1443 spin_lock_irqsave(&cm_core->ht_lock, flags);
1444 list_for_each_entry(cm_node, hte, list) {
1445 if (!memcmp(cm_node->loc_addr, loc_addr, sizeof(cm_node->loc_addr)) &&
1446 (cm_node->loc_port == loc_port) &&
1447 !memcmp(cm_node->rem_addr, rem_addr, sizeof(cm_node->rem_addr)) &&
1448 (cm_node->rem_port == rem_port)) {
1450 atomic_inc(&cm_node->ref_count);
1451 spin_unlock_irqrestore(&cm_core->ht_lock, flags);
1455 spin_unlock_irqrestore(&cm_core->ht_lock, flags);
1462 * i40iw_find_listener - find a cm node listening on this addr-port pair
1463 * @cm_core: cm's core
1464 * @dst_port: listener tcp port num
1465 * @dst_addr: listener ip addr
1466 * @listener_state: state to match with listen node's
1468 static struct i40iw_cm_listener *i40iw_find_listener(
1469 struct i40iw_cm_core *cm_core,
1473 enum i40iw_cm_listener_state
1476 struct i40iw_cm_listener *listen_node;
1477 static const u32 ip_zero[4] = { 0, 0, 0, 0 };
1480 unsigned long flags;
1482 /* walk list and find cm_node associated with this session ID */
1483 spin_lock_irqsave(&cm_core->listen_list_lock, flags);
1484 list_for_each_entry(listen_node, &cm_core->listen_nodes, list) {
1485 memcpy(listen_addr, listen_node->loc_addr, sizeof(listen_addr));
1486 listen_port = listen_node->loc_port;
1487 /* compare node pair, return node handle if a match */
1488 if ((!memcmp(listen_addr, dst_addr, sizeof(listen_addr)) ||
1489 !memcmp(listen_addr, ip_zero, sizeof(listen_addr))) &&
1490 (listen_port == dst_port) &&
1491 (listener_state & listen_node->listener_state)) {
1492 atomic_inc(&listen_node->ref_count);
1493 spin_unlock_irqrestore(&cm_core->listen_list_lock, flags);
1497 spin_unlock_irqrestore(&cm_core->listen_list_lock, flags);
1502 * i40iw_add_hte_node - add a cm node to the hash table
1503 * @cm_core: cm's core
1504 * @cm_node: connection's node
1506 static void i40iw_add_hte_node(struct i40iw_cm_core *cm_core,
1507 struct i40iw_cm_node *cm_node)
1509 unsigned long flags;
1511 if (!cm_node || !cm_core) {
1512 i40iw_pr_err("cm_node or cm_core == NULL\n");
1516 spin_lock_irqsave(&cm_core->ht_lock, flags);
1517 list_add_tail(&cm_node->list, &cm_core->non_accelerated_list);
1518 spin_unlock_irqrestore(&cm_core->ht_lock, flags);
1522 * i40iw_find_port - find port that matches reference port
1523 * @hte: ptr to accelerated or non-accelerated list
1524 * @accelerated_list: flag for accelerated vs non-accelerated list
1526 static bool i40iw_find_port(struct list_head *hte, u16 port)
1528 struct i40iw_cm_node *cm_node;
1530 list_for_each_entry(cm_node, hte, list) {
1531 if (cm_node->loc_port == port)
1538 * i40iw_port_in_use - determine if port is in use
1539 * @cm_core: cm's core
1540 * @port: port number
1542 bool i40iw_port_in_use(struct i40iw_cm_core *cm_core, u16 port)
1544 struct i40iw_cm_listener *listen_node;
1545 unsigned long flags;
1547 spin_lock_irqsave(&cm_core->ht_lock, flags);
1548 if (i40iw_find_port(&cm_core->accelerated_list, port) ||
1549 i40iw_find_port(&cm_core->non_accelerated_list, port)) {
1550 spin_unlock_irqrestore(&cm_core->ht_lock, flags);
1553 spin_unlock_irqrestore(&cm_core->ht_lock, flags);
1555 spin_lock_irqsave(&cm_core->listen_list_lock, flags);
1556 list_for_each_entry(listen_node, &cm_core->listen_nodes, list) {
1557 if (listen_node->loc_port == port) {
1558 spin_unlock_irqrestore(&cm_core->listen_list_lock, flags);
1562 spin_unlock_irqrestore(&cm_core->listen_list_lock, flags);
1568 * i40iw_del_multiple_qhash - Remove qhash and child listens
1569 * @iwdev: iWarp device
1570 * @cm_info: CM info for parent listen node
1571 * @cm_parent_listen_node: The parent listen node
1573 static enum i40iw_status_code i40iw_del_multiple_qhash(
1574 struct i40iw_device *iwdev,
1575 struct i40iw_cm_info *cm_info,
1576 struct i40iw_cm_listener *cm_parent_listen_node)
1578 struct i40iw_cm_listener *child_listen_node;
1579 enum i40iw_status_code ret = I40IW_ERR_CONFIG;
1580 struct list_head *pos, *tpos;
1581 unsigned long flags;
1583 spin_lock_irqsave(&iwdev->cm_core.listen_list_lock, flags);
1584 list_for_each_safe(pos, tpos, &cm_parent_listen_node->child_listen_list) {
1585 child_listen_node = list_entry(pos, struct i40iw_cm_listener, child_listen_list);
1586 if (child_listen_node->ipv4)
1587 i40iw_debug(&iwdev->sc_dev,
1589 "removing child listen for IP=%pI4, port=%d, vlan=%d\n",
1590 child_listen_node->loc_addr,
1591 child_listen_node->loc_port,
1592 child_listen_node->vlan_id);
1594 i40iw_debug(&iwdev->sc_dev, I40IW_DEBUG_CM,
1595 "removing child listen for IP=%pI6, port=%d, vlan=%d\n",
1596 child_listen_node->loc_addr,
1597 child_listen_node->loc_port,
1598 child_listen_node->vlan_id);
1600 memcpy(cm_info->loc_addr, child_listen_node->loc_addr,
1601 sizeof(cm_info->loc_addr));
1602 cm_info->vlan_id = child_listen_node->vlan_id;
1603 if (child_listen_node->qhash_set) {
1604 ret = i40iw_manage_qhash(iwdev, cm_info,
1605 I40IW_QHASH_TYPE_TCP_SYN,
1606 I40IW_QHASH_MANAGE_TYPE_DELETE,
1608 child_listen_node->qhash_set = false;
1610 ret = I40IW_SUCCESS;
1612 i40iw_debug(&iwdev->sc_dev,
1614 "freed pointer = %p\n",
1616 kfree(child_listen_node);
1617 cm_parent_listen_node->cm_core->stats_listen_nodes_destroyed++;
1619 spin_unlock_irqrestore(&iwdev->cm_core.listen_list_lock, flags);
1625 * i40iw_netdev_vlan_ipv6 - Gets the netdev and vlan
1626 * @addr: local IPv6 address
1627 * @vlan_id: vlan id for the given IPv6 address
1629 * Returns the net_device of the IPv6 address and also sets the
1630 * vlan id for that address.
1632 static struct net_device *i40iw_netdev_vlan_ipv6(u32 *addr, u16 *vlan_id)
1634 struct net_device *ip_dev = NULL;
1635 struct in6_addr laddr6;
1637 if (!IS_ENABLED(CONFIG_IPV6))
1639 i40iw_copy_ip_htonl(laddr6.in6_u.u6_addr32, addr);
1641 *vlan_id = I40IW_NO_VLAN;
1643 for_each_netdev_rcu(&init_net, ip_dev) {
1644 if (ipv6_chk_addr(&init_net, &laddr6, ip_dev, 1)) {
1646 *vlan_id = rdma_vlan_dev_vlan_id(ip_dev);
1655 * i40iw_get_vlan_ipv4 - Returns the vlan_id for IPv4 address
1656 * @addr: local IPv4 address
1658 static u16 i40iw_get_vlan_ipv4(u32 *addr)
1660 struct net_device *netdev;
1661 u16 vlan_id = I40IW_NO_VLAN;
1663 netdev = ip_dev_find(&init_net, htonl(addr[0]));
1665 vlan_id = rdma_vlan_dev_vlan_id(netdev);
1672 * i40iw_add_mqh_6 - Adds multiple qhashes for IPv6
1673 * @iwdev: iWarp device
1674 * @cm_info: CM info for parent listen node
1675 * @cm_parent_listen_node: The parent listen node
1677 * Adds a qhash and a child listen node for every IPv6 address
1678 * on the adapter and adds the associated qhash filter
1680 static enum i40iw_status_code i40iw_add_mqh_6(struct i40iw_device *iwdev,
1681 struct i40iw_cm_info *cm_info,
1682 struct i40iw_cm_listener *cm_parent_listen_node)
1684 struct net_device *ip_dev;
1685 struct inet6_dev *idev;
1686 struct inet6_ifaddr *ifp, *tmp;
1687 enum i40iw_status_code ret = 0;
1688 struct i40iw_cm_listener *child_listen_node;
1689 unsigned long flags;
1692 for_each_netdev(&init_net, ip_dev) {
1693 if ((((rdma_vlan_dev_vlan_id(ip_dev) < I40IW_NO_VLAN) &&
1694 (rdma_vlan_dev_real_dev(ip_dev) == iwdev->netdev)) ||
1695 (ip_dev == iwdev->netdev)) && (ip_dev->flags & IFF_UP)) {
1696 idev = __in6_dev_get(ip_dev);
1698 i40iw_pr_err("idev == NULL\n");
1701 list_for_each_entry_safe(ifp, tmp, &idev->addr_list, if_list) {
1702 i40iw_debug(&iwdev->sc_dev,
1704 "IP=%pI6, vlan_id=%d, MAC=%pM\n",
1706 rdma_vlan_dev_vlan_id(ip_dev),
1709 kzalloc(sizeof(*child_listen_node), GFP_ATOMIC);
1710 i40iw_debug(&iwdev->sc_dev,
1712 "Allocating child listener %p\n",
1714 if (!child_listen_node) {
1715 ret = I40IW_ERR_NO_MEMORY;
1718 cm_info->vlan_id = rdma_vlan_dev_vlan_id(ip_dev);
1719 cm_parent_listen_node->vlan_id = cm_info->vlan_id;
1721 memcpy(child_listen_node, cm_parent_listen_node,
1722 sizeof(*child_listen_node));
1724 i40iw_copy_ip_ntohl(child_listen_node->loc_addr,
1725 ifp->addr.in6_u.u6_addr32);
1726 memcpy(cm_info->loc_addr, child_listen_node->loc_addr,
1727 sizeof(cm_info->loc_addr));
1729 ret = i40iw_manage_qhash(iwdev, cm_info,
1730 I40IW_QHASH_TYPE_TCP_SYN,
1731 I40IW_QHASH_MANAGE_TYPE_ADD,
1734 child_listen_node->qhash_set = true;
1735 spin_lock_irqsave(&iwdev->cm_core.listen_list_lock, flags);
1736 list_add(&child_listen_node->child_listen_list,
1737 &cm_parent_listen_node->child_listen_list);
1738 spin_unlock_irqrestore(&iwdev->cm_core.listen_list_lock, flags);
1739 cm_parent_listen_node->cm_core->stats_listen_nodes_created++;
1741 kfree(child_listen_node);
1752 * i40iw_add_mqh_4 - Adds multiple qhashes for IPv4
1753 * @iwdev: iWarp device
1754 * @cm_info: CM info for parent listen node
1755 * @cm_parent_listen_node: The parent listen node
1757 * Adds a qhash and a child listen node for every IPv4 address
1758 * on the adapter and adds the associated qhash filter
1760 static enum i40iw_status_code i40iw_add_mqh_4(
1761 struct i40iw_device *iwdev,
1762 struct i40iw_cm_info *cm_info,
1763 struct i40iw_cm_listener *cm_parent_listen_node)
1765 struct net_device *dev;
1766 struct in_device *idev;
1767 struct i40iw_cm_listener *child_listen_node;
1768 enum i40iw_status_code ret = 0;
1769 unsigned long flags;
1772 for_each_netdev(&init_net, dev) {
1773 if ((((rdma_vlan_dev_vlan_id(dev) < I40IW_NO_VLAN) &&
1774 (rdma_vlan_dev_real_dev(dev) == iwdev->netdev)) ||
1775 (dev == iwdev->netdev)) && (dev->flags & IFF_UP)) {
1776 idev = in_dev_get(dev);
1778 i40iw_debug(&iwdev->sc_dev,
1780 "Allocating child CM Listener forIP=%pI4, vlan_id=%d, MAC=%pM\n",
1782 rdma_vlan_dev_vlan_id(dev),
1784 child_listen_node = kzalloc(sizeof(*child_listen_node), GFP_KERNEL);
1785 cm_parent_listen_node->cm_core->stats_listen_nodes_created++;
1786 i40iw_debug(&iwdev->sc_dev,
1788 "Allocating child listener %p\n",
1790 if (!child_listen_node) {
1792 ret = I40IW_ERR_NO_MEMORY;
1795 cm_info->vlan_id = rdma_vlan_dev_vlan_id(dev);
1796 cm_parent_listen_node->vlan_id = cm_info->vlan_id;
1797 memcpy(child_listen_node,
1798 cm_parent_listen_node,
1799 sizeof(*child_listen_node));
1801 child_listen_node->loc_addr[0] = ntohl(ifa->ifa_address);
1802 memcpy(cm_info->loc_addr, child_listen_node->loc_addr,
1803 sizeof(cm_info->loc_addr));
1805 ret = i40iw_manage_qhash(iwdev,
1807 I40IW_QHASH_TYPE_TCP_SYN,
1808 I40IW_QHASH_MANAGE_TYPE_ADD,
1812 child_listen_node->qhash_set = true;
1813 spin_lock_irqsave(&iwdev->cm_core.listen_list_lock, flags);
1814 list_add(&child_listen_node->child_listen_list,
1815 &cm_parent_listen_node->child_listen_list);
1816 spin_unlock_irqrestore(&iwdev->cm_core.listen_list_lock, flags);
1818 kfree(child_listen_node);
1819 cm_parent_listen_node->cm_core->stats_listen_nodes_created--;
1832 * i40iw_dec_refcnt_listen - delete listener and associated cm nodes
1833 * @cm_core: cm's core
1834 * @free_hanging_nodes: to free associated cm_nodes
1835 * @apbvt_del: flag to delete the apbvt
1837 static int i40iw_dec_refcnt_listen(struct i40iw_cm_core *cm_core,
1838 struct i40iw_cm_listener *listener,
1839 int free_hanging_nodes, bool apbvt_del)
1843 struct list_head *list_pos;
1844 struct list_head *list_temp;
1845 struct i40iw_cm_node *cm_node;
1846 struct list_head reset_list;
1847 struct i40iw_cm_info nfo;
1848 struct i40iw_cm_node *loopback;
1849 enum i40iw_cm_node_state old_state;
1850 unsigned long flags;
1852 /* free non-accelerated child nodes for this listener */
1853 INIT_LIST_HEAD(&reset_list);
1854 if (free_hanging_nodes) {
1855 spin_lock_irqsave(&cm_core->ht_lock, flags);
1856 list_for_each_safe(list_pos,
1857 list_temp, &cm_core->non_accelerated_list) {
1858 cm_node = container_of(list_pos, struct i40iw_cm_node, list);
1859 if ((cm_node->listener == listener) &&
1860 !cm_node->accelerated) {
1861 atomic_inc(&cm_node->ref_count);
1862 list_add(&cm_node->reset_entry, &reset_list);
1865 spin_unlock_irqrestore(&cm_core->ht_lock, flags);
1868 list_for_each_safe(list_pos, list_temp, &reset_list) {
1869 cm_node = container_of(list_pos, struct i40iw_cm_node, reset_entry);
1870 loopback = cm_node->loopbackpartner;
1871 if (cm_node->state >= I40IW_CM_STATE_FIN_WAIT1) {
1872 i40iw_rem_ref_cm_node(cm_node);
1875 i40iw_cleanup_retrans_entry(cm_node);
1876 err = i40iw_send_reset(cm_node);
1878 cm_node->state = I40IW_CM_STATE_CLOSED;
1879 i40iw_pr_err("send reset\n");
1881 old_state = cm_node->state;
1882 cm_node->state = I40IW_CM_STATE_LISTENER_DESTROYED;
1883 if (old_state != I40IW_CM_STATE_MPAREQ_RCVD)
1884 i40iw_rem_ref_cm_node(cm_node);
1887 struct i40iw_cm_event event;
1889 event.cm_node = loopback;
1890 memcpy(event.cm_info.rem_addr,
1891 loopback->rem_addr, sizeof(event.cm_info.rem_addr));
1892 memcpy(event.cm_info.loc_addr,
1893 loopback->loc_addr, sizeof(event.cm_info.loc_addr));
1894 event.cm_info.rem_port = loopback->rem_port;
1895 event.cm_info.loc_port = loopback->loc_port;
1896 event.cm_info.cm_id = loopback->cm_id;
1897 event.cm_info.ipv4 = loopback->ipv4;
1898 atomic_inc(&loopback->ref_count);
1899 loopback->state = I40IW_CM_STATE_CLOSED;
1900 i40iw_event_connect_error(&event);
1901 cm_node->state = I40IW_CM_STATE_LISTENER_DESTROYED;
1902 i40iw_rem_ref_cm_node(cm_node);
1907 if (!atomic_dec_return(&listener->ref_count)) {
1908 spin_lock_irqsave(&cm_core->listen_list_lock, flags);
1909 list_del(&listener->list);
1910 spin_unlock_irqrestore(&cm_core->listen_list_lock, flags);
1912 if (listener->iwdev) {
1914 i40iw_manage_apbvt(listener->iwdev,
1916 I40IW_MANAGE_APBVT_DEL);
1918 memcpy(nfo.loc_addr, listener->loc_addr, sizeof(nfo.loc_addr));
1919 nfo.loc_port = listener->loc_port;
1920 nfo.ipv4 = listener->ipv4;
1921 nfo.vlan_id = listener->vlan_id;
1922 nfo.user_pri = listener->user_pri;
1924 if (!list_empty(&listener->child_listen_list)) {
1925 i40iw_del_multiple_qhash(listener->iwdev, &nfo, listener);
1927 if (listener->qhash_set)
1928 i40iw_manage_qhash(listener->iwdev,
1930 I40IW_QHASH_TYPE_TCP_SYN,
1931 I40IW_QHASH_MANAGE_TYPE_DELETE,
1937 cm_core->stats_listen_destroyed++;
1939 cm_core->stats_listen_nodes_destroyed++;
1945 if (atomic_read(&listener->pend_accepts_cnt) > 0)
1946 i40iw_debug(cm_core->dev,
1948 "%s: listener (%p) pending accepts=%u\n",
1951 atomic_read(&listener->pend_accepts_cnt));
1958 * i40iw_cm_del_listen - delete a linstener
1959 * @cm_core: cm's core
1960 * @listener: passive connection's listener
1961 * @apbvt_del: flag to delete apbvt
1963 static int i40iw_cm_del_listen(struct i40iw_cm_core *cm_core,
1964 struct i40iw_cm_listener *listener,
1967 listener->listener_state = I40IW_CM_LISTENER_PASSIVE_STATE;
1968 listener->cm_id = NULL; /* going to be destroyed pretty soon */
1969 return i40iw_dec_refcnt_listen(cm_core, listener, 1, apbvt_del);
1973 * i40iw_addr_resolve_neigh - resolve neighbor address
1974 * @iwdev: iwarp device structure
1975 * @src_ip: local ip address
1976 * @dst_ip: remote ip address
1977 * @arpindex: if there is an arp entry
1979 static int i40iw_addr_resolve_neigh(struct i40iw_device *iwdev,
1985 struct neighbour *neigh;
1987 __be32 dst_ipaddr = htonl(dst_ip);
1988 __be32 src_ipaddr = htonl(src_ip);
1990 rt = ip_route_output(&init_net, dst_ipaddr, src_ipaddr, 0, 0);
1992 i40iw_pr_err("ip_route_output\n");
1996 neigh = dst_neigh_lookup(&rt->dst, &dst_ipaddr);
2000 if (neigh->nud_state & NUD_VALID) {
2001 if (arpindex >= 0) {
2002 if (ether_addr_equal(iwdev->arp_table[arpindex].mac_addr,
2004 /* Mac address same as arp table */
2005 goto resolve_neigh_exit;
2006 i40iw_manage_arp_cache(iwdev,
2007 iwdev->arp_table[arpindex].mac_addr,
2013 i40iw_manage_arp_cache(iwdev, neigh->ha, &dst_ip, true, I40IW_ARP_ADD);
2014 rc = i40iw_arp_table(iwdev, &dst_ip, true, NULL, I40IW_ARP_RESOLVE);
2016 neigh_event_send(neigh, NULL);
2023 neigh_release(neigh);
2030 * i40iw_get_dst_ipv6
2032 static struct dst_entry *i40iw_get_dst_ipv6(struct sockaddr_in6 *src_addr,
2033 struct sockaddr_in6 *dst_addr)
2035 struct dst_entry *dst;
2038 memset(&fl6, 0, sizeof(fl6));
2039 fl6.daddr = dst_addr->sin6_addr;
2040 fl6.saddr = src_addr->sin6_addr;
2041 if (ipv6_addr_type(&fl6.daddr) & IPV6_ADDR_LINKLOCAL)
2042 fl6.flowi6_oif = dst_addr->sin6_scope_id;
2044 dst = ip6_route_output(&init_net, NULL, &fl6);
2049 * i40iw_addr_resolve_neigh_ipv6 - resolve neighbor ipv6 address
2050 * @iwdev: iwarp device structure
2051 * @dst_ip: remote ip address
2052 * @arpindex: if there is an arp entry
2054 static int i40iw_addr_resolve_neigh_ipv6(struct i40iw_device *iwdev,
2059 struct neighbour *neigh;
2061 struct dst_entry *dst;
2062 struct sockaddr_in6 dst_addr;
2063 struct sockaddr_in6 src_addr;
2065 memset(&dst_addr, 0, sizeof(dst_addr));
2066 dst_addr.sin6_family = AF_INET6;
2067 i40iw_copy_ip_htonl(dst_addr.sin6_addr.in6_u.u6_addr32, dest);
2068 memset(&src_addr, 0, sizeof(src_addr));
2069 src_addr.sin6_family = AF_INET6;
2070 i40iw_copy_ip_htonl(src_addr.sin6_addr.in6_u.u6_addr32, src);
2071 dst = i40iw_get_dst_ipv6(&src_addr, &dst_addr);
2072 if (!dst || dst->error) {
2074 i40iw_pr_err("ip6_route_output returned dst->error = %d\n",
2081 neigh = dst_neigh_lookup(dst, dst_addr.sin6_addr.in6_u.u6_addr32);
2085 i40iw_debug(&iwdev->sc_dev, I40IW_DEBUG_CM, "dst_neigh_lookup MAC=%pM\n", neigh->ha);
2086 if (neigh->nud_state & NUD_VALID) {
2087 if (arpindex >= 0) {
2088 if (ether_addr_equal
2089 (iwdev->arp_table[arpindex].mac_addr,
2091 /* Mac address same as in arp table */
2092 goto resolve_neigh_exit6;
2094 i40iw_manage_arp_cache(iwdev,
2095 iwdev->arp_table[arpindex].mac_addr,
2100 i40iw_manage_arp_cache(iwdev,
2105 rc = i40iw_arp_table(iwdev,
2111 neigh_event_send(neigh, NULL);
2115 resolve_neigh_exit6:
2118 neigh_release(neigh);
2124 * i40iw_ipv4_is_loopback - check if loopback
2125 * @loc_addr: local addr to compare
2126 * @rem_addr: remote address
2128 static bool i40iw_ipv4_is_loopback(u32 loc_addr, u32 rem_addr)
2130 return ipv4_is_loopback(htonl(rem_addr)) || (loc_addr == rem_addr);
2134 * i40iw_ipv6_is_loopback - check if loopback
2135 * @loc_addr: local addr to compare
2136 * @rem_addr: remote address
2138 static bool i40iw_ipv6_is_loopback(u32 *loc_addr, u32 *rem_addr)
2140 struct in6_addr raddr6;
2142 i40iw_copy_ip_htonl(raddr6.in6_u.u6_addr32, rem_addr);
2143 return !memcmp(loc_addr, rem_addr, 16) || ipv6_addr_loopback(&raddr6);
2147 * i40iw_make_cm_node - create a new instance of a cm node
2148 * @cm_core: cm's core
2149 * @iwdev: iwarp device structure
2150 * @cm_info: quad info for connection
2151 * @listener: passive connection's listener
2153 static struct i40iw_cm_node *i40iw_make_cm_node(
2154 struct i40iw_cm_core *cm_core,
2155 struct i40iw_device *iwdev,
2156 struct i40iw_cm_info *cm_info,
2157 struct i40iw_cm_listener *listener)
2159 struct i40iw_cm_node *cm_node;
2162 struct net_device *netdev = iwdev->netdev;
2164 /* create an hte and cm_node for this instance */
2165 cm_node = kzalloc(sizeof(*cm_node), GFP_ATOMIC);
2169 /* set our node specific transport info */
2170 cm_node->ipv4 = cm_info->ipv4;
2171 cm_node->vlan_id = cm_info->vlan_id;
2172 if ((cm_node->vlan_id == I40IW_NO_VLAN) && iwdev->dcb)
2173 cm_node->vlan_id = 0;
2174 cm_node->tos = cm_info->tos;
2175 cm_node->user_pri = cm_info->user_pri;
2177 if (listener->tos != cm_info->tos)
2178 i40iw_debug(&iwdev->sc_dev, I40IW_DEBUG_DCB,
2179 "application TOS[%d] and remote client TOS[%d] mismatch\n",
2180 listener->tos, cm_info->tos);
2181 cm_node->tos = max(listener->tos, cm_info->tos);
2182 cm_node->user_pri = rt_tos2priority(cm_node->tos);
2183 i40iw_debug(&iwdev->sc_dev, I40IW_DEBUG_DCB, "listener: TOS:[%d] UP:[%d]\n",
2184 cm_node->tos, cm_node->user_pri);
2186 memcpy(cm_node->loc_addr, cm_info->loc_addr, sizeof(cm_node->loc_addr));
2187 memcpy(cm_node->rem_addr, cm_info->rem_addr, sizeof(cm_node->rem_addr));
2188 cm_node->loc_port = cm_info->loc_port;
2189 cm_node->rem_port = cm_info->rem_port;
2191 cm_node->mpa_frame_rev = iwdev->mpa_version;
2192 cm_node->send_rdma0_op = SEND_RDMA_READ_ZERO;
2193 cm_node->ird_size = I40IW_MAX_IRD_SIZE;
2194 cm_node->ord_size = I40IW_MAX_ORD_SIZE;
2196 cm_node->listener = listener;
2197 cm_node->cm_id = cm_info->cm_id;
2198 ether_addr_copy(cm_node->loc_mac, netdev->dev_addr);
2199 spin_lock_init(&cm_node->retrans_list_lock);
2200 cm_node->ack_rcvd = false;
2202 atomic_set(&cm_node->ref_count, 1);
2203 /* associate our parent CM core */
2204 cm_node->cm_core = cm_core;
2205 cm_node->tcp_cntxt.loc_id = I40IW_CM_DEF_LOCAL_ID;
2206 cm_node->tcp_cntxt.rcv_wscale = I40IW_CM_DEFAULT_RCV_WND_SCALE;
2207 cm_node->tcp_cntxt.rcv_wnd =
2208 I40IW_CM_DEFAULT_RCV_WND_SCALED >> I40IW_CM_DEFAULT_RCV_WND_SCALE;
2209 if (cm_node->ipv4) {
2210 cm_node->tcp_cntxt.loc_seq_num = secure_tcp_seq(htonl(cm_node->loc_addr[0]),
2211 htonl(cm_node->rem_addr[0]),
2212 htons(cm_node->loc_port),
2213 htons(cm_node->rem_port));
2214 cm_node->tcp_cntxt.mss = iwdev->vsi.mtu - I40IW_MTU_TO_MSS_IPV4;
2215 } else if (IS_ENABLED(CONFIG_IPV6)) {
2217 htonl(cm_node->loc_addr[0]), htonl(cm_node->loc_addr[1]),
2218 htonl(cm_node->loc_addr[2]), htonl(cm_node->loc_addr[3])
2221 htonl(cm_node->rem_addr[0]), htonl(cm_node->rem_addr[1]),
2222 htonl(cm_node->rem_addr[2]), htonl(cm_node->rem_addr[3])
2224 cm_node->tcp_cntxt.loc_seq_num = secure_tcpv6_seq(loc, rem,
2225 htons(cm_node->loc_port),
2226 htons(cm_node->rem_port));
2227 cm_node->tcp_cntxt.mss = iwdev->vsi.mtu - I40IW_MTU_TO_MSS_IPV6;
2230 cm_node->iwdev = iwdev;
2231 cm_node->dev = &iwdev->sc_dev;
2233 if ((cm_node->ipv4 &&
2234 i40iw_ipv4_is_loopback(cm_node->loc_addr[0], cm_node->rem_addr[0])) ||
2235 (!cm_node->ipv4 && i40iw_ipv6_is_loopback(cm_node->loc_addr,
2236 cm_node->rem_addr))) {
2237 arpindex = i40iw_arp_table(iwdev,
2243 oldarpindex = i40iw_arp_table(iwdev,
2249 arpindex = i40iw_addr_resolve_neigh(iwdev,
2250 cm_info->loc_addr[0],
2251 cm_info->rem_addr[0],
2253 else if (IS_ENABLED(CONFIG_IPV6))
2254 arpindex = i40iw_addr_resolve_neigh_ipv6(iwdev,
2262 i40iw_pr_err("cm_node arpindex\n");
2266 ether_addr_copy(cm_node->rem_mac, iwdev->arp_table[arpindex].mac_addr);
2267 i40iw_add_hte_node(cm_core, cm_node);
2268 cm_core->stats_nodes_created++;
2273 * i40iw_rem_ref_cm_node - destroy an instance of a cm node
2274 * @cm_node: connection's node
2276 static void i40iw_rem_ref_cm_node(struct i40iw_cm_node *cm_node)
2278 struct i40iw_cm_core *cm_core = cm_node->cm_core;
2279 struct i40iw_qp *iwqp;
2280 struct i40iw_cm_info nfo;
2281 unsigned long flags;
2283 spin_lock_irqsave(&cm_node->cm_core->ht_lock, flags);
2284 if (atomic_dec_return(&cm_node->ref_count)) {
2285 spin_unlock_irqrestore(&cm_node->cm_core->ht_lock, flags);
2288 list_del(&cm_node->list);
2289 spin_unlock_irqrestore(&cm_node->cm_core->ht_lock, flags);
2291 /* if the node is destroyed before connection was accelerated */
2292 if (!cm_node->accelerated && cm_node->accept_pend) {
2293 pr_err("node destroyed before established\n");
2294 atomic_dec(&cm_node->listener->pend_accepts_cnt);
2296 if (cm_node->close_entry)
2297 i40iw_handle_close_entry(cm_node, 0);
2298 if (cm_node->listener) {
2299 i40iw_dec_refcnt_listen(cm_core, cm_node->listener, 0, true);
2301 if (cm_node->apbvt_set) {
2302 i40iw_manage_apbvt(cm_node->iwdev,
2304 I40IW_MANAGE_APBVT_DEL);
2305 cm_node->apbvt_set = 0;
2307 i40iw_get_addr_info(cm_node, &nfo);
2308 if (cm_node->qhash_set) {
2309 i40iw_manage_qhash(cm_node->iwdev,
2311 I40IW_QHASH_TYPE_TCP_ESTABLISHED,
2312 I40IW_QHASH_MANAGE_TYPE_DELETE,
2315 cm_node->qhash_set = 0;
2319 iwqp = cm_node->iwqp;
2321 iwqp->cm_node = NULL;
2322 i40iw_rem_ref(&iwqp->ibqp);
2323 cm_node->iwqp = NULL;
2324 } else if (cm_node->qhash_set) {
2325 i40iw_get_addr_info(cm_node, &nfo);
2326 i40iw_manage_qhash(cm_node->iwdev,
2328 I40IW_QHASH_TYPE_TCP_ESTABLISHED,
2329 I40IW_QHASH_MANAGE_TYPE_DELETE,
2332 cm_node->qhash_set = 0;
2335 cm_node->cm_core->stats_nodes_destroyed++;
2340 * i40iw_handle_fin_pkt - FIN packet received
2341 * @cm_node: connection's node
2343 static void i40iw_handle_fin_pkt(struct i40iw_cm_node *cm_node)
2347 switch (cm_node->state) {
2348 case I40IW_CM_STATE_SYN_RCVD:
2349 case I40IW_CM_STATE_SYN_SENT:
2350 case I40IW_CM_STATE_ESTABLISHED:
2351 case I40IW_CM_STATE_MPAREJ_RCVD:
2352 cm_node->tcp_cntxt.rcv_nxt++;
2353 i40iw_cleanup_retrans_entry(cm_node);
2354 cm_node->state = I40IW_CM_STATE_LAST_ACK;
2355 i40iw_send_fin(cm_node);
2357 case I40IW_CM_STATE_MPAREQ_SENT:
2358 i40iw_create_event(cm_node, I40IW_CM_EVENT_ABORTED);
2359 cm_node->tcp_cntxt.rcv_nxt++;
2360 i40iw_cleanup_retrans_entry(cm_node);
2361 cm_node->state = I40IW_CM_STATE_CLOSED;
2362 atomic_inc(&cm_node->ref_count);
2363 i40iw_send_reset(cm_node);
2365 case I40IW_CM_STATE_FIN_WAIT1:
2366 cm_node->tcp_cntxt.rcv_nxt++;
2367 i40iw_cleanup_retrans_entry(cm_node);
2368 cm_node->state = I40IW_CM_STATE_CLOSING;
2369 i40iw_send_ack(cm_node);
2371 * Wait for ACK as this is simultaneous close.
2372 * After we receive ACK, do not send anything.
2376 case I40IW_CM_STATE_FIN_WAIT2:
2377 cm_node->tcp_cntxt.rcv_nxt++;
2378 i40iw_cleanup_retrans_entry(cm_node);
2379 cm_node->state = I40IW_CM_STATE_TIME_WAIT;
2380 i40iw_send_ack(cm_node);
2382 i40iw_schedule_cm_timer(cm_node, NULL, I40IW_TIMER_TYPE_CLOSE, 1, 0);
2384 i40iw_pr_err("node %p state = %d\n", cm_node, cm_node->state);
2386 case I40IW_CM_STATE_TIME_WAIT:
2387 cm_node->tcp_cntxt.rcv_nxt++;
2388 i40iw_cleanup_retrans_entry(cm_node);
2389 cm_node->state = I40IW_CM_STATE_CLOSED;
2390 i40iw_rem_ref_cm_node(cm_node);
2392 case I40IW_CM_STATE_OFFLOADED:
2394 i40iw_pr_err("bad state node %p state = %d\n", cm_node, cm_node->state);
2400 * i40iw_handle_rst_pkt - process received RST packet
2401 * @cm_node: connection's node
2402 * @rbuf: receive buffer
2404 static void i40iw_handle_rst_pkt(struct i40iw_cm_node *cm_node,
2405 struct i40iw_puda_buf *rbuf)
2407 i40iw_cleanup_retrans_entry(cm_node);
2408 switch (cm_node->state) {
2409 case I40IW_CM_STATE_SYN_SENT:
2410 case I40IW_CM_STATE_MPAREQ_SENT:
2411 switch (cm_node->mpa_frame_rev) {
2413 cm_node->mpa_frame_rev = IETF_MPA_V1;
2414 /* send a syn and goto syn sent state */
2415 cm_node->state = I40IW_CM_STATE_SYN_SENT;
2416 if (i40iw_send_syn(cm_node, 0))
2417 i40iw_active_open_err(cm_node, false);
2421 i40iw_active_open_err(cm_node, false);
2425 case I40IW_CM_STATE_MPAREQ_RCVD:
2426 atomic_add_return(1, &cm_node->passive_state);
2428 case I40IW_CM_STATE_ESTABLISHED:
2429 case I40IW_CM_STATE_SYN_RCVD:
2430 case I40IW_CM_STATE_LISTENING:
2431 i40iw_pr_err("Bad state state = %d\n", cm_node->state);
2432 i40iw_passive_open_err(cm_node, false);
2434 case I40IW_CM_STATE_OFFLOADED:
2435 i40iw_active_open_err(cm_node, false);
2437 case I40IW_CM_STATE_CLOSED:
2439 case I40IW_CM_STATE_FIN_WAIT2:
2440 case I40IW_CM_STATE_FIN_WAIT1:
2441 case I40IW_CM_STATE_LAST_ACK:
2442 cm_node->cm_id->rem_ref(cm_node->cm_id);
2444 case I40IW_CM_STATE_TIME_WAIT:
2445 cm_node->state = I40IW_CM_STATE_CLOSED;
2446 i40iw_rem_ref_cm_node(cm_node);
2454 * i40iw_handle_rcv_mpa - Process a recv'd mpa buffer
2455 * @cm_node: connection's node
2456 * @rbuf: receive buffer
2458 static void i40iw_handle_rcv_mpa(struct i40iw_cm_node *cm_node,
2459 struct i40iw_puda_buf *rbuf)
2462 int datasize = rbuf->datalen;
2463 u8 *dataloc = rbuf->data;
2465 enum i40iw_cm_event_type type = I40IW_CM_EVENT_UNKNOWN;
2468 ret = i40iw_parse_mpa(cm_node, dataloc, &res_type, datasize);
2470 if (cm_node->state == I40IW_CM_STATE_MPAREQ_SENT)
2471 i40iw_active_open_err(cm_node, true);
2473 i40iw_passive_open_err(cm_node, true);
2477 switch (cm_node->state) {
2478 case I40IW_CM_STATE_ESTABLISHED:
2479 if (res_type == I40IW_MPA_REQUEST_REJECT)
2480 i40iw_pr_err("state for reject\n");
2481 cm_node->state = I40IW_CM_STATE_MPAREQ_RCVD;
2482 type = I40IW_CM_EVENT_MPA_REQ;
2483 i40iw_send_ack(cm_node); /* ACK received MPA request */
2484 atomic_set(&cm_node->passive_state,
2485 I40IW_PASSIVE_STATE_INDICATED);
2487 case I40IW_CM_STATE_MPAREQ_SENT:
2488 i40iw_cleanup_retrans_entry(cm_node);
2489 if (res_type == I40IW_MPA_REQUEST_REJECT) {
2490 type = I40IW_CM_EVENT_MPA_REJECT;
2491 cm_node->state = I40IW_CM_STATE_MPAREJ_RCVD;
2493 type = I40IW_CM_EVENT_CONNECTED;
2494 cm_node->state = I40IW_CM_STATE_OFFLOADED;
2496 i40iw_send_ack(cm_node);
2499 pr_err("%s wrong cm_node state =%d\n", __func__, cm_node->state);
2502 i40iw_create_event(cm_node, type);
2506 * i40iw_indicate_pkt_err - Send up err event to cm
2507 * @cm_node: connection's node
2509 static void i40iw_indicate_pkt_err(struct i40iw_cm_node *cm_node)
2511 switch (cm_node->state) {
2512 case I40IW_CM_STATE_SYN_SENT:
2513 case I40IW_CM_STATE_MPAREQ_SENT:
2514 i40iw_active_open_err(cm_node, true);
2516 case I40IW_CM_STATE_ESTABLISHED:
2517 case I40IW_CM_STATE_SYN_RCVD:
2518 i40iw_passive_open_err(cm_node, true);
2520 case I40IW_CM_STATE_OFFLOADED:
2527 * i40iw_check_syn - Check for error on received syn ack
2528 * @cm_node: connection's node
2529 * @tcph: pointer tcp header
2531 static int i40iw_check_syn(struct i40iw_cm_node *cm_node, struct tcphdr *tcph)
2535 if (ntohl(tcph->ack_seq) != cm_node->tcp_cntxt.loc_seq_num) {
2537 i40iw_active_open_err(cm_node, true);
2543 * i40iw_check_seq - check seq numbers if OK
2544 * @cm_node: connection's node
2545 * @tcph: pointer tcp header
2547 static int i40iw_check_seq(struct i40iw_cm_node *cm_node, struct tcphdr *tcph)
2552 u32 loc_seq_num = cm_node->tcp_cntxt.loc_seq_num;
2553 u32 rcv_nxt = cm_node->tcp_cntxt.rcv_nxt;
2556 seq = ntohl(tcph->seq);
2557 ack_seq = ntohl(tcph->ack_seq);
2558 rcv_wnd = cm_node->tcp_cntxt.rcv_wnd;
2559 if (ack_seq != loc_seq_num)
2561 else if (!between(seq, rcv_nxt, (rcv_nxt + rcv_wnd)))
2564 i40iw_pr_err("seq number\n");
2565 i40iw_indicate_pkt_err(cm_node);
2571 * i40iw_handle_syn_pkt - is for Passive node
2572 * @cm_node: connection's node
2573 * @rbuf: receive buffer
2575 static void i40iw_handle_syn_pkt(struct i40iw_cm_node *cm_node,
2576 struct i40iw_puda_buf *rbuf)
2578 struct tcphdr *tcph = (struct tcphdr *)rbuf->tcph;
2582 struct i40iw_cm_info nfo;
2584 optionsize = (tcph->doff << 2) - sizeof(struct tcphdr);
2585 inc_sequence = ntohl(tcph->seq);
2587 switch (cm_node->state) {
2588 case I40IW_CM_STATE_SYN_SENT:
2589 case I40IW_CM_STATE_MPAREQ_SENT:
2590 /* Rcvd syn on active open connection */
2591 i40iw_active_open_err(cm_node, 1);
2593 case I40IW_CM_STATE_LISTENING:
2595 if (atomic_read(&cm_node->listener->pend_accepts_cnt) >
2596 cm_node->listener->backlog) {
2597 cm_node->cm_core->stats_backlog_drops++;
2598 i40iw_passive_open_err(cm_node, false);
2601 ret = i40iw_handle_tcp_options(cm_node, tcph, optionsize, 1);
2603 i40iw_passive_open_err(cm_node, false);
2607 cm_node->tcp_cntxt.rcv_nxt = inc_sequence + 1;
2608 cm_node->accept_pend = 1;
2609 atomic_inc(&cm_node->listener->pend_accepts_cnt);
2611 cm_node->state = I40IW_CM_STATE_SYN_RCVD;
2612 i40iw_get_addr_info(cm_node, &nfo);
2613 ret = i40iw_manage_qhash(cm_node->iwdev,
2615 I40IW_QHASH_TYPE_TCP_ESTABLISHED,
2616 I40IW_QHASH_MANAGE_TYPE_ADD,
2619 cm_node->qhash_set = true;
2621 case I40IW_CM_STATE_CLOSED:
2622 i40iw_cleanup_retrans_entry(cm_node);
2623 atomic_inc(&cm_node->ref_count);
2624 i40iw_send_reset(cm_node);
2626 case I40IW_CM_STATE_OFFLOADED:
2627 case I40IW_CM_STATE_ESTABLISHED:
2628 case I40IW_CM_STATE_FIN_WAIT1:
2629 case I40IW_CM_STATE_FIN_WAIT2:
2630 case I40IW_CM_STATE_MPAREQ_RCVD:
2631 case I40IW_CM_STATE_LAST_ACK:
2632 case I40IW_CM_STATE_CLOSING:
2633 case I40IW_CM_STATE_UNKNOWN:
2640 * i40iw_handle_synack_pkt - Process SYN+ACK packet (active side)
2641 * @cm_node: connection's node
2642 * @rbuf: receive buffer
2644 static void i40iw_handle_synack_pkt(struct i40iw_cm_node *cm_node,
2645 struct i40iw_puda_buf *rbuf)
2647 struct tcphdr *tcph = (struct tcphdr *)rbuf->tcph;
2652 optionsize = (tcph->doff << 2) - sizeof(struct tcphdr);
2653 inc_sequence = ntohl(tcph->seq);
2654 switch (cm_node->state) {
2655 case I40IW_CM_STATE_SYN_SENT:
2656 i40iw_cleanup_retrans_entry(cm_node);
2658 if (i40iw_check_syn(cm_node, tcph)) {
2659 i40iw_pr_err("check syn fail\n");
2662 cm_node->tcp_cntxt.rem_ack_num = ntohl(tcph->ack_seq);
2664 ret = i40iw_handle_tcp_options(cm_node, tcph, optionsize, 0);
2666 i40iw_debug(cm_node->dev,
2668 "cm_node=%p tcp_options failed\n",
2672 i40iw_cleanup_retrans_entry(cm_node);
2673 cm_node->tcp_cntxt.rcv_nxt = inc_sequence + 1;
2674 i40iw_send_ack(cm_node); /* ACK for the syn_ack */
2675 ret = i40iw_send_mpa_request(cm_node);
2677 i40iw_debug(cm_node->dev,
2679 "cm_node=%p i40iw_send_mpa_request failed\n",
2683 cm_node->state = I40IW_CM_STATE_MPAREQ_SENT;
2685 case I40IW_CM_STATE_MPAREQ_RCVD:
2686 i40iw_passive_open_err(cm_node, true);
2688 case I40IW_CM_STATE_LISTENING:
2689 cm_node->tcp_cntxt.loc_seq_num = ntohl(tcph->ack_seq);
2690 i40iw_cleanup_retrans_entry(cm_node);
2691 cm_node->state = I40IW_CM_STATE_CLOSED;
2692 i40iw_send_reset(cm_node);
2694 case I40IW_CM_STATE_CLOSED:
2695 cm_node->tcp_cntxt.loc_seq_num = ntohl(tcph->ack_seq);
2696 i40iw_cleanup_retrans_entry(cm_node);
2697 atomic_inc(&cm_node->ref_count);
2698 i40iw_send_reset(cm_node);
2700 case I40IW_CM_STATE_ESTABLISHED:
2701 case I40IW_CM_STATE_FIN_WAIT1:
2702 case I40IW_CM_STATE_FIN_WAIT2:
2703 case I40IW_CM_STATE_LAST_ACK:
2704 case I40IW_CM_STATE_OFFLOADED:
2705 case I40IW_CM_STATE_CLOSING:
2706 case I40IW_CM_STATE_UNKNOWN:
2707 case I40IW_CM_STATE_MPAREQ_SENT:
2714 * i40iw_handle_ack_pkt - process packet with ACK
2715 * @cm_node: connection's node
2716 * @rbuf: receive buffer
2718 static int i40iw_handle_ack_pkt(struct i40iw_cm_node *cm_node,
2719 struct i40iw_puda_buf *rbuf)
2721 struct tcphdr *tcph = (struct tcphdr *)rbuf->tcph;
2725 u32 datasize = rbuf->datalen;
2727 optionsize = (tcph->doff << 2) - sizeof(struct tcphdr);
2729 if (i40iw_check_seq(cm_node, tcph))
2732 inc_sequence = ntohl(tcph->seq);
2733 switch (cm_node->state) {
2734 case I40IW_CM_STATE_SYN_RCVD:
2735 i40iw_cleanup_retrans_entry(cm_node);
2736 ret = i40iw_handle_tcp_options(cm_node, tcph, optionsize, 1);
2739 cm_node->tcp_cntxt.rem_ack_num = ntohl(tcph->ack_seq);
2740 cm_node->state = I40IW_CM_STATE_ESTABLISHED;
2742 cm_node->tcp_cntxt.rcv_nxt = inc_sequence + datasize;
2743 i40iw_handle_rcv_mpa(cm_node, rbuf);
2746 case I40IW_CM_STATE_ESTABLISHED:
2747 i40iw_cleanup_retrans_entry(cm_node);
2749 cm_node->tcp_cntxt.rcv_nxt = inc_sequence + datasize;
2750 i40iw_handle_rcv_mpa(cm_node, rbuf);
2753 case I40IW_CM_STATE_MPAREQ_SENT:
2754 cm_node->tcp_cntxt.rem_ack_num = ntohl(tcph->ack_seq);
2756 cm_node->tcp_cntxt.rcv_nxt = inc_sequence + datasize;
2757 cm_node->ack_rcvd = false;
2758 i40iw_handle_rcv_mpa(cm_node, rbuf);
2760 cm_node->ack_rcvd = true;
2763 case I40IW_CM_STATE_LISTENING:
2764 i40iw_cleanup_retrans_entry(cm_node);
2765 cm_node->state = I40IW_CM_STATE_CLOSED;
2766 i40iw_send_reset(cm_node);
2768 case I40IW_CM_STATE_CLOSED:
2769 i40iw_cleanup_retrans_entry(cm_node);
2770 atomic_inc(&cm_node->ref_count);
2771 i40iw_send_reset(cm_node);
2773 case I40IW_CM_STATE_LAST_ACK:
2774 case I40IW_CM_STATE_CLOSING:
2775 i40iw_cleanup_retrans_entry(cm_node);
2776 cm_node->state = I40IW_CM_STATE_CLOSED;
2777 if (!cm_node->accept_pend)
2778 cm_node->cm_id->rem_ref(cm_node->cm_id);
2779 i40iw_rem_ref_cm_node(cm_node);
2781 case I40IW_CM_STATE_FIN_WAIT1:
2782 i40iw_cleanup_retrans_entry(cm_node);
2783 cm_node->state = I40IW_CM_STATE_FIN_WAIT2;
2785 case I40IW_CM_STATE_SYN_SENT:
2786 case I40IW_CM_STATE_FIN_WAIT2:
2787 case I40IW_CM_STATE_OFFLOADED:
2788 case I40IW_CM_STATE_MPAREQ_RCVD:
2789 case I40IW_CM_STATE_UNKNOWN:
2791 i40iw_cleanup_retrans_entry(cm_node);
2798 * i40iw_process_packet - process cm packet
2799 * @cm_node: connection's node
2800 * @rbuf: receive buffer
2802 static void i40iw_process_packet(struct i40iw_cm_node *cm_node,
2803 struct i40iw_puda_buf *rbuf)
2805 enum i40iw_tcpip_pkt_type pkt_type = I40IW_PKT_TYPE_UNKNOWN;
2806 struct tcphdr *tcph = (struct tcphdr *)rbuf->tcph;
2811 pkt_type = I40IW_PKT_TYPE_RST;
2812 } else if (tcph->syn) {
2813 pkt_type = I40IW_PKT_TYPE_SYN;
2815 pkt_type = I40IW_PKT_TYPE_SYNACK;
2816 } else if (tcph->ack) {
2817 pkt_type = I40IW_PKT_TYPE_ACK;
2823 case I40IW_PKT_TYPE_SYN:
2824 i40iw_handle_syn_pkt(cm_node, rbuf);
2826 case I40IW_PKT_TYPE_SYNACK:
2827 i40iw_handle_synack_pkt(cm_node, rbuf);
2829 case I40IW_PKT_TYPE_ACK:
2830 ret = i40iw_handle_ack_pkt(cm_node, rbuf);
2831 if (fin_set && !ret)
2832 i40iw_handle_fin_pkt(cm_node);
2834 case I40IW_PKT_TYPE_RST:
2835 i40iw_handle_rst_pkt(cm_node, rbuf);
2839 (!i40iw_check_seq(cm_node, (struct tcphdr *)rbuf->tcph)))
2840 i40iw_handle_fin_pkt(cm_node);
2846 * i40iw_make_listen_node - create a listen node with params
2847 * @cm_core: cm's core
2848 * @iwdev: iwarp device structure
2849 * @cm_info: quad info for connection
2851 static struct i40iw_cm_listener *i40iw_make_listen_node(
2852 struct i40iw_cm_core *cm_core,
2853 struct i40iw_device *iwdev,
2854 struct i40iw_cm_info *cm_info)
2856 struct i40iw_cm_listener *listener;
2857 unsigned long flags;
2859 /* cannot have multiple matching listeners */
2860 listener = i40iw_find_listener(cm_core, cm_info->loc_addr,
2863 I40IW_CM_LISTENER_EITHER_STATE);
2865 (listener->listener_state == I40IW_CM_LISTENER_ACTIVE_STATE)) {
2866 atomic_dec(&listener->ref_count);
2867 i40iw_debug(cm_core->dev,
2869 "Not creating listener since it already exists\n");
2874 /* create a CM listen node (1/2 node to compare incoming traffic to) */
2875 listener = kzalloc(sizeof(*listener), GFP_KERNEL);
2878 cm_core->stats_listen_nodes_created++;
2879 memcpy(listener->loc_addr, cm_info->loc_addr, sizeof(listener->loc_addr));
2880 listener->loc_port = cm_info->loc_port;
2882 INIT_LIST_HEAD(&listener->child_listen_list);
2884 atomic_set(&listener->ref_count, 1);
2886 listener->reused_node = 1;
2889 listener->cm_id = cm_info->cm_id;
2890 listener->ipv4 = cm_info->ipv4;
2891 listener->vlan_id = cm_info->vlan_id;
2892 atomic_set(&listener->pend_accepts_cnt, 0);
2893 listener->cm_core = cm_core;
2894 listener->iwdev = iwdev;
2896 listener->backlog = cm_info->backlog;
2897 listener->listener_state = I40IW_CM_LISTENER_ACTIVE_STATE;
2899 if (!listener->reused_node) {
2900 spin_lock_irqsave(&cm_core->listen_list_lock, flags);
2901 list_add(&listener->list, &cm_core->listen_nodes);
2902 spin_unlock_irqrestore(&cm_core->listen_list_lock, flags);
2909 * i40iw_create_cm_node - make a connection node with params
2910 * @cm_core: cm's core
2911 * @iwdev: iwarp device structure
2912 * @conn_param: upper layer connection parameters
2913 * @cm_info: quad info for connection
2915 static struct i40iw_cm_node *i40iw_create_cm_node(
2916 struct i40iw_cm_core *cm_core,
2917 struct i40iw_device *iwdev,
2918 struct iw_cm_conn_param *conn_param,
2919 struct i40iw_cm_info *cm_info)
2921 struct i40iw_cm_node *cm_node;
2922 struct i40iw_cm_listener *loopback_remotelistener;
2923 struct i40iw_cm_node *loopback_remotenode;
2924 struct i40iw_cm_info loopback_cm_info;
2926 u16 private_data_len = conn_param->private_data_len;
2927 const void *private_data = conn_param->private_data;
2929 /* create a CM connection node */
2930 cm_node = i40iw_make_cm_node(cm_core, iwdev, cm_info, NULL);
2932 return ERR_PTR(-ENOMEM);
2933 /* set our node side to client (active) side */
2934 cm_node->tcp_cntxt.client = 1;
2935 cm_node->tcp_cntxt.rcv_wscale = I40IW_CM_DEFAULT_RCV_WND_SCALE;
2937 i40iw_record_ird_ord(cm_node, conn_param->ird, conn_param->ord);
2939 if (!memcmp(cm_info->loc_addr, cm_info->rem_addr, sizeof(cm_info->loc_addr))) {
2940 loopback_remotelistener = i40iw_find_listener(
2945 I40IW_CM_LISTENER_ACTIVE_STATE);
2946 if (!loopback_remotelistener) {
2947 i40iw_rem_ref_cm_node(cm_node);
2948 return ERR_PTR(-ECONNREFUSED);
2950 loopback_cm_info = *cm_info;
2951 loopback_cm_info.loc_port = cm_info->rem_port;
2952 loopback_cm_info.rem_port = cm_info->loc_port;
2953 loopback_cm_info.cm_id = loopback_remotelistener->cm_id;
2954 loopback_cm_info.ipv4 = cm_info->ipv4;
2955 loopback_remotenode = i40iw_make_cm_node(cm_core,
2958 loopback_remotelistener);
2959 if (!loopback_remotenode) {
2960 i40iw_rem_ref_cm_node(cm_node);
2961 return ERR_PTR(-ENOMEM);
2963 cm_core->stats_loopbacks++;
2964 loopback_remotenode->loopbackpartner = cm_node;
2965 loopback_remotenode->tcp_cntxt.rcv_wscale =
2966 I40IW_CM_DEFAULT_RCV_WND_SCALE;
2967 cm_node->loopbackpartner = loopback_remotenode;
2968 memcpy(loopback_remotenode->pdata_buf, private_data,
2970 loopback_remotenode->pdata.size = private_data_len;
2972 if (loopback_remotenode->ord_size > cm_node->ird_size)
2973 loopback_remotenode->ord_size =
2976 cm_node->state = I40IW_CM_STATE_OFFLOADED;
2977 cm_node->tcp_cntxt.rcv_nxt =
2978 loopback_remotenode->tcp_cntxt.loc_seq_num;
2979 loopback_remotenode->tcp_cntxt.rcv_nxt =
2980 cm_node->tcp_cntxt.loc_seq_num;
2981 cm_node->tcp_cntxt.max_snd_wnd =
2982 loopback_remotenode->tcp_cntxt.rcv_wnd;
2983 loopback_remotenode->tcp_cntxt.max_snd_wnd = cm_node->tcp_cntxt.rcv_wnd;
2984 cm_node->tcp_cntxt.snd_wnd = loopback_remotenode->tcp_cntxt.rcv_wnd;
2985 loopback_remotenode->tcp_cntxt.snd_wnd = cm_node->tcp_cntxt.rcv_wnd;
2986 cm_node->tcp_cntxt.snd_wscale = loopback_remotenode->tcp_cntxt.rcv_wscale;
2987 loopback_remotenode->tcp_cntxt.snd_wscale = cm_node->tcp_cntxt.rcv_wscale;
2992 cm_node->pdata.size = private_data_len;
2993 cm_node->pdata.addr = cm_node->pdata_buf;
2995 memcpy(cm_node->pdata_buf, private_data, private_data_len);
2997 cm_node->state = I40IW_CM_STATE_SYN_SENT;
3002 * i40iw_cm_reject - reject and teardown a connection
3003 * @cm_node: connection's node
3004 * @pdate: ptr to private data for reject
3005 * @plen: size of private data
3007 static int i40iw_cm_reject(struct i40iw_cm_node *cm_node, const void *pdata, u8 plen)
3012 struct iw_cm_id *cm_id = cm_node->cm_id;
3013 struct i40iw_cm_node *loopback = cm_node->loopbackpartner;
3015 if (cm_node->tcp_cntxt.client)
3017 i40iw_cleanup_retrans_entry(cm_node);
3020 passive_state = atomic_add_return(1, &cm_node->passive_state);
3021 if (passive_state == I40IW_SEND_RESET_EVENT) {
3022 cm_node->state = I40IW_CM_STATE_CLOSED;
3023 i40iw_rem_ref_cm_node(cm_node);
3025 if (cm_node->state == I40IW_CM_STATE_LISTENER_DESTROYED) {
3026 i40iw_rem_ref_cm_node(cm_node);
3028 ret = i40iw_send_mpa_reject(cm_node, pdata, plen);
3030 cm_node->state = I40IW_CM_STATE_CLOSED;
3031 err = i40iw_send_reset(cm_node);
3033 i40iw_pr_err("send reset failed\n");
3035 cm_id->add_ref(cm_id);
3040 cm_node->cm_id = NULL;
3041 if (cm_node->state == I40IW_CM_STATE_LISTENER_DESTROYED) {
3042 i40iw_rem_ref_cm_node(cm_node);
3043 i40iw_rem_ref_cm_node(loopback);
3045 ret = i40iw_send_cm_event(loopback,
3047 IW_CM_EVENT_CONNECT_REPLY,
3049 i40iw_rem_ref_cm_node(cm_node);
3050 loopback->state = I40IW_CM_STATE_CLOSING;
3052 cm_id = loopback->cm_id;
3053 i40iw_rem_ref_cm_node(loopback);
3054 cm_id->rem_ref(cm_id);
3062 * i40iw_cm_close - close of cm connection
3063 * @cm_node: connection's node
3065 static int i40iw_cm_close(struct i40iw_cm_node *cm_node)
3072 switch (cm_node->state) {
3073 case I40IW_CM_STATE_SYN_RCVD:
3074 case I40IW_CM_STATE_SYN_SENT:
3075 case I40IW_CM_STATE_ONE_SIDE_ESTABLISHED:
3076 case I40IW_CM_STATE_ESTABLISHED:
3077 case I40IW_CM_STATE_ACCEPTING:
3078 case I40IW_CM_STATE_MPAREQ_SENT:
3079 case I40IW_CM_STATE_MPAREQ_RCVD:
3080 i40iw_cleanup_retrans_entry(cm_node);
3081 i40iw_send_reset(cm_node);
3083 case I40IW_CM_STATE_CLOSE_WAIT:
3084 cm_node->state = I40IW_CM_STATE_LAST_ACK;
3085 i40iw_send_fin(cm_node);
3087 case I40IW_CM_STATE_FIN_WAIT1:
3088 case I40IW_CM_STATE_FIN_WAIT2:
3089 case I40IW_CM_STATE_LAST_ACK:
3090 case I40IW_CM_STATE_TIME_WAIT:
3091 case I40IW_CM_STATE_CLOSING:
3094 case I40IW_CM_STATE_LISTENING:
3095 i40iw_cleanup_retrans_entry(cm_node);
3096 i40iw_send_reset(cm_node);
3098 case I40IW_CM_STATE_MPAREJ_RCVD:
3099 case I40IW_CM_STATE_UNKNOWN:
3100 case I40IW_CM_STATE_INITED:
3101 case I40IW_CM_STATE_CLOSED:
3102 case I40IW_CM_STATE_LISTENER_DESTROYED:
3103 i40iw_rem_ref_cm_node(cm_node);
3105 case I40IW_CM_STATE_OFFLOADED:
3106 if (cm_node->send_entry)
3107 i40iw_pr_err("send_entry\n");
3108 i40iw_rem_ref_cm_node(cm_node);
3115 * i40iw_receive_ilq - recv an ETHERNET packet, and process it
3117 * @vsi: pointer to the vsi structure
3118 * @rbuf: receive buffer
3120 void i40iw_receive_ilq(struct i40iw_sc_vsi *vsi, struct i40iw_puda_buf *rbuf)
3122 struct i40iw_cm_node *cm_node;
3123 struct i40iw_cm_listener *listener;
3125 struct ipv6hdr *ip6h;
3126 struct tcphdr *tcph;
3127 struct i40iw_cm_info cm_info;
3128 struct i40iw_sc_dev *dev = vsi->dev;
3129 struct i40iw_device *iwdev = (struct i40iw_device *)dev->back_dev;
3130 struct i40iw_cm_core *cm_core = &iwdev->cm_core;
3131 struct vlan_ethhdr *ethh;
3134 /* if vlan, then maclen = 18 else 14 */
3135 iph = (struct iphdr *)rbuf->iph;
3136 memset(&cm_info, 0, sizeof(cm_info));
3138 i40iw_debug_buf(dev,
3140 "RECEIVE ILQ BUFFER",
3143 ethh = (struct vlan_ethhdr *)rbuf->mem.va;
3145 if (ethh->h_vlan_proto == htons(ETH_P_8021Q)) {
3146 vtag = ntohs(ethh->h_vlan_TCI);
3147 cm_info.user_pri = (vtag & VLAN_PRIO_MASK) >> VLAN_PRIO_SHIFT;
3148 cm_info.vlan_id = vtag & VLAN_VID_MASK;
3149 i40iw_debug(cm_core->dev,
3155 cm_info.vlan_id = I40IW_NO_VLAN;
3157 tcph = (struct tcphdr *)rbuf->tcph;
3160 cm_info.loc_addr[0] = ntohl(iph->daddr);
3161 cm_info.rem_addr[0] = ntohl(iph->saddr);
3162 cm_info.ipv4 = true;
3163 cm_info.tos = iph->tos;
3165 ip6h = (struct ipv6hdr *)rbuf->iph;
3166 i40iw_copy_ip_ntohl(cm_info.loc_addr,
3167 ip6h->daddr.in6_u.u6_addr32);
3168 i40iw_copy_ip_ntohl(cm_info.rem_addr,
3169 ip6h->saddr.in6_u.u6_addr32);
3170 cm_info.ipv4 = false;
3171 cm_info.tos = (ip6h->priority << 4) | (ip6h->flow_lbl[0] >> 4);
3173 cm_info.loc_port = ntohs(tcph->dest);
3174 cm_info.rem_port = ntohs(tcph->source);
3175 cm_node = i40iw_find_node(cm_core,
3184 /* Only type of packet accepted are for */
3185 /* the PASSIVE open (syn only) */
3186 if (!tcph->syn || tcph->ack)
3189 i40iw_find_listener(cm_core,
3193 I40IW_CM_LISTENER_ACTIVE_STATE);
3195 cm_info.cm_id = NULL;
3196 i40iw_debug(cm_core->dev,
3198 "%s no listener found\n",
3202 cm_info.cm_id = listener->cm_id;
3203 cm_node = i40iw_make_cm_node(cm_core, iwdev, &cm_info, listener);
3205 i40iw_debug(cm_core->dev,
3207 "%s allocate node failed\n",
3209 atomic_dec(&listener->ref_count);
3212 if (!tcph->rst && !tcph->fin) {
3213 cm_node->state = I40IW_CM_STATE_LISTENING;
3215 i40iw_rem_ref_cm_node(cm_node);
3218 atomic_inc(&cm_node->ref_count);
3219 } else if (cm_node->state == I40IW_CM_STATE_OFFLOADED) {
3220 i40iw_rem_ref_cm_node(cm_node);
3223 i40iw_process_packet(cm_node, rbuf);
3224 i40iw_rem_ref_cm_node(cm_node);
3228 * i40iw_setup_cm_core - allocate a top level instance of a cm
3230 * @iwdev: iwarp device structure
3232 void i40iw_setup_cm_core(struct i40iw_device *iwdev)
3234 struct i40iw_cm_core *cm_core = &iwdev->cm_core;
3236 cm_core->iwdev = iwdev;
3237 cm_core->dev = &iwdev->sc_dev;
3239 INIT_LIST_HEAD(&cm_core->accelerated_list);
3240 INIT_LIST_HEAD(&cm_core->non_accelerated_list);
3241 INIT_LIST_HEAD(&cm_core->listen_nodes);
3243 timer_setup(&cm_core->tcp_timer, i40iw_cm_timer_tick, 0);
3245 spin_lock_init(&cm_core->ht_lock);
3246 spin_lock_init(&cm_core->listen_list_lock);
3247 spin_lock_init(&cm_core->apbvt_lock);
3249 cm_core->event_wq = alloc_ordered_workqueue("iwewq",
3252 cm_core->disconn_wq = alloc_ordered_workqueue("iwdwq",
3257 * i40iw_cleanup_cm_core - deallocate a top level instance of a
3259 * @cm_core: cm's core
3261 void i40iw_cleanup_cm_core(struct i40iw_cm_core *cm_core)
3263 unsigned long flags;
3268 spin_lock_irqsave(&cm_core->ht_lock, flags);
3269 if (timer_pending(&cm_core->tcp_timer))
3270 del_timer_sync(&cm_core->tcp_timer);
3271 spin_unlock_irqrestore(&cm_core->ht_lock, flags);
3273 destroy_workqueue(cm_core->event_wq);
3274 destroy_workqueue(cm_core->disconn_wq);
3278 * i40iw_init_tcp_ctx - setup qp context
3279 * @cm_node: connection's node
3280 * @tcp_info: offload info for tcp
3281 * @iwqp: associate qp for the connection
3283 static void i40iw_init_tcp_ctx(struct i40iw_cm_node *cm_node,
3284 struct i40iw_tcp_offload_info *tcp_info,
3285 struct i40iw_qp *iwqp)
3287 tcp_info->ipv4 = cm_node->ipv4;
3288 tcp_info->drop_ooo_seg = true;
3289 tcp_info->wscale = true;
3290 tcp_info->ignore_tcp_opt = true;
3291 tcp_info->ignore_tcp_uns_opt = true;
3292 tcp_info->no_nagle = false;
3294 tcp_info->ttl = I40IW_DEFAULT_TTL;
3295 tcp_info->rtt_var = cpu_to_le32(I40IW_DEFAULT_RTT_VAR);
3296 tcp_info->ss_thresh = cpu_to_le32(I40IW_DEFAULT_SS_THRESH);
3297 tcp_info->rexmit_thresh = I40IW_DEFAULT_REXMIT_THRESH;
3299 tcp_info->tcp_state = I40IW_TCP_STATE_ESTABLISHED;
3300 tcp_info->snd_wscale = cm_node->tcp_cntxt.snd_wscale;
3301 tcp_info->rcv_wscale = cm_node->tcp_cntxt.rcv_wscale;
3303 tcp_info->snd_nxt = cpu_to_le32(cm_node->tcp_cntxt.loc_seq_num);
3304 tcp_info->snd_wnd = cpu_to_le32(cm_node->tcp_cntxt.snd_wnd);
3305 tcp_info->rcv_nxt = cpu_to_le32(cm_node->tcp_cntxt.rcv_nxt);
3306 tcp_info->snd_max = cpu_to_le32(cm_node->tcp_cntxt.loc_seq_num);
3308 tcp_info->snd_una = cpu_to_le32(cm_node->tcp_cntxt.loc_seq_num);
3309 tcp_info->cwnd = cpu_to_le32(2 * cm_node->tcp_cntxt.mss);
3310 tcp_info->snd_wl1 = cpu_to_le32(cm_node->tcp_cntxt.rcv_nxt);
3311 tcp_info->snd_wl2 = cpu_to_le32(cm_node->tcp_cntxt.loc_seq_num);
3312 tcp_info->max_snd_window = cpu_to_le32(cm_node->tcp_cntxt.max_snd_wnd);
3313 tcp_info->rcv_wnd = cpu_to_le32(cm_node->tcp_cntxt.rcv_wnd <<
3314 cm_node->tcp_cntxt.rcv_wscale);
3316 tcp_info->flow_label = 0;
3317 tcp_info->snd_mss = cpu_to_le32(((u32)cm_node->tcp_cntxt.mss));
3318 if (cm_node->vlan_id < VLAN_TAG_PRESENT) {
3319 tcp_info->insert_vlan_tag = true;
3320 tcp_info->vlan_tag = cpu_to_le16(((u16)cm_node->user_pri << I40IW_VLAN_PRIO_SHIFT) |
3323 if (cm_node->ipv4) {
3324 tcp_info->src_port = cpu_to_le16(cm_node->loc_port);
3325 tcp_info->dst_port = cpu_to_le16(cm_node->rem_port);
3327 tcp_info->dest_ip_addr3 = cpu_to_le32(cm_node->rem_addr[0]);
3328 tcp_info->local_ipaddr3 = cpu_to_le32(cm_node->loc_addr[0]);
3330 cpu_to_le16((u16)i40iw_arp_table(
3332 &tcp_info->dest_ip_addr3,
3335 I40IW_ARP_RESOLVE));
3337 tcp_info->src_port = cpu_to_le16(cm_node->loc_port);
3338 tcp_info->dst_port = cpu_to_le16(cm_node->rem_port);
3339 tcp_info->dest_ip_addr0 = cpu_to_le32(cm_node->rem_addr[0]);
3340 tcp_info->dest_ip_addr1 = cpu_to_le32(cm_node->rem_addr[1]);
3341 tcp_info->dest_ip_addr2 = cpu_to_le32(cm_node->rem_addr[2]);
3342 tcp_info->dest_ip_addr3 = cpu_to_le32(cm_node->rem_addr[3]);
3343 tcp_info->local_ipaddr0 = cpu_to_le32(cm_node->loc_addr[0]);
3344 tcp_info->local_ipaddr1 = cpu_to_le32(cm_node->loc_addr[1]);
3345 tcp_info->local_ipaddr2 = cpu_to_le32(cm_node->loc_addr[2]);
3346 tcp_info->local_ipaddr3 = cpu_to_le32(cm_node->loc_addr[3]);
3348 cpu_to_le16((u16)i40iw_arp_table(
3350 &tcp_info->dest_ip_addr0,
3353 I40IW_ARP_RESOLVE));
3358 * i40iw_cm_init_tsa_conn - setup qp for RTS
3359 * @iwqp: associate qp for the connection
3360 * @cm_node: connection's node
3362 static void i40iw_cm_init_tsa_conn(struct i40iw_qp *iwqp,
3363 struct i40iw_cm_node *cm_node)
3365 struct i40iw_tcp_offload_info tcp_info;
3366 struct i40iwarp_offload_info *iwarp_info;
3367 struct i40iw_qp_host_ctx_info *ctx_info;
3368 struct i40iw_device *iwdev = iwqp->iwdev;
3369 struct i40iw_sc_dev *dev = &iwqp->iwdev->sc_dev;
3371 memset(&tcp_info, 0x00, sizeof(struct i40iw_tcp_offload_info));
3372 iwarp_info = &iwqp->iwarp_info;
3373 ctx_info = &iwqp->ctx_info;
3375 ctx_info->tcp_info = &tcp_info;
3376 ctx_info->send_cq_num = iwqp->iwscq->sc_cq.cq_uk.cq_id;
3377 ctx_info->rcv_cq_num = iwqp->iwrcq->sc_cq.cq_uk.cq_id;
3379 iwarp_info->ord_size = cm_node->ord_size;
3380 iwarp_info->ird_size = i40iw_derive_hw_ird_setting(cm_node->ird_size);
3382 if (iwarp_info->ord_size == 1)
3383 iwarp_info->ord_size = 2;
3385 iwarp_info->rd_enable = true;
3386 iwarp_info->rdmap_ver = 1;
3387 iwarp_info->ddp_ver = 1;
3389 iwarp_info->pd_id = iwqp->iwpd->sc_pd.pd_id;
3391 ctx_info->tcp_info_valid = true;
3392 ctx_info->iwarp_info_valid = true;
3393 ctx_info->add_to_qoslist = true;
3394 ctx_info->user_pri = cm_node->user_pri;
3396 i40iw_init_tcp_ctx(cm_node, &tcp_info, iwqp);
3397 if (cm_node->snd_mark_en) {
3398 iwarp_info->snd_mark_en = true;
3399 iwarp_info->snd_mark_offset = (tcp_info.snd_nxt &
3400 SNDMARKER_SEQNMASK) + cm_node->lsmm_size;
3403 cm_node->state = I40IW_CM_STATE_OFFLOADED;
3404 tcp_info.tcp_state = I40IW_TCP_STATE_ESTABLISHED;
3405 tcp_info.src_mac_addr_idx = iwdev->mac_ip_table_idx;
3406 tcp_info.tos = cm_node->tos;
3408 dev->iw_priv_qp_ops->qp_setctx(&iwqp->sc_qp, (u64 *)(iwqp->host_ctx.va), ctx_info);
3410 /* once tcp_info is set, no need to do it again */
3411 ctx_info->tcp_info_valid = false;
3412 ctx_info->iwarp_info_valid = false;
3413 ctx_info->add_to_qoslist = false;
3417 * i40iw_cm_disconn - when a connection is being closed
3418 * @iwqp: associate qp for the connection
3420 void i40iw_cm_disconn(struct i40iw_qp *iwqp)
3422 struct disconn_work *work;
3423 struct i40iw_device *iwdev = iwqp->iwdev;
3424 struct i40iw_cm_core *cm_core = &iwdev->cm_core;
3425 unsigned long flags;
3427 work = kzalloc(sizeof(*work), GFP_ATOMIC);
3429 return; /* Timer will clean up */
3431 spin_lock_irqsave(&iwdev->qptable_lock, flags);
3432 if (!iwdev->qp_table[iwqp->ibqp.qp_num]) {
3433 spin_unlock_irqrestore(&iwdev->qptable_lock, flags);
3434 i40iw_debug(&iwdev->sc_dev, I40IW_DEBUG_CM,
3435 "%s qp_id %d is already freed\n",
3436 __func__, iwqp->ibqp.qp_num);
3440 i40iw_add_ref(&iwqp->ibqp);
3441 spin_unlock_irqrestore(&iwdev->qptable_lock, flags);
3444 INIT_WORK(&work->work, i40iw_disconnect_worker);
3445 queue_work(cm_core->disconn_wq, &work->work);
3450 * i40iw_qp_disconnect - free qp and close cm
3451 * @iwqp: associate qp for the connection
3453 static void i40iw_qp_disconnect(struct i40iw_qp *iwqp)
3455 struct i40iw_device *iwdev;
3456 struct i40iw_ib_device *iwibdev;
3458 iwdev = to_iwdev(iwqp->ibqp.device);
3460 i40iw_pr_err("iwdev == NULL\n");
3464 iwibdev = iwdev->iwibdev;
3466 if (iwqp->active_conn) {
3467 /* indicate this connection is NOT active */
3468 iwqp->active_conn = 0;
3470 /* Need to free the Last Streaming Mode Message */
3471 if (iwqp->ietf_mem.va) {
3473 iwibdev->ibdev.dereg_mr(iwqp->lsmm_mr);
3474 i40iw_free_dma_mem(iwdev->sc_dev.hw, &iwqp->ietf_mem);
3478 /* close the CM node down if it is still active */
3479 if (iwqp->cm_node) {
3480 i40iw_debug(&iwdev->sc_dev, I40IW_DEBUG_CM, "%s Call close API\n", __func__);
3481 i40iw_cm_close(iwqp->cm_node);
3486 * i40iw_cm_disconn_true - called by worker thread to disconnect qp
3487 * @iwqp: associate qp for the connection
3489 static void i40iw_cm_disconn_true(struct i40iw_qp *iwqp)
3491 struct iw_cm_id *cm_id;
3492 struct i40iw_device *iwdev;
3493 struct i40iw_sc_qp *qp = &iwqp->sc_qp;
3495 u8 original_hw_tcp_state;
3496 u8 original_ibqp_state;
3497 int disconn_status = 0;
3498 int issue_disconn = 0;
3499 int issue_close = 0;
3500 int issue_flush = 0;
3501 struct ib_event ibevent;
3502 unsigned long flags;
3506 i40iw_pr_err("iwqp == NULL\n");
3510 spin_lock_irqsave(&iwqp->lock, flags);
3511 cm_id = iwqp->cm_id;
3512 /* make sure we havent already closed this connection */
3514 spin_unlock_irqrestore(&iwqp->lock, flags);
3518 iwdev = to_iwdev(iwqp->ibqp.device);
3520 original_hw_tcp_state = iwqp->hw_tcp_state;
3521 original_ibqp_state = iwqp->ibqp_state;
3522 last_ae = iwqp->last_aeq;
3524 if (qp->term_flags) {
3528 /*When term timer expires after cm_timer, don't want
3529 *terminate-handler to issue cm_disconn which can re-free
3530 *a QP even after its refcnt=0.
3532 i40iw_terminate_del_timer(qp);
3533 if (!iwqp->flush_issued) {
3534 iwqp->flush_issued = 1;
3537 } else if ((original_hw_tcp_state == I40IW_TCP_STATE_CLOSE_WAIT) ||
3538 ((original_ibqp_state == IB_QPS_RTS) &&
3539 (last_ae == I40IW_AE_LLP_CONNECTION_RESET))) {
3541 if (last_ae == I40IW_AE_LLP_CONNECTION_RESET)
3542 disconn_status = -ECONNRESET;
3545 if (((original_hw_tcp_state == I40IW_TCP_STATE_CLOSED) ||
3546 (original_hw_tcp_state == I40IW_TCP_STATE_TIME_WAIT) ||
3547 (last_ae == I40IW_AE_RDMAP_ROE_BAD_LLP_CLOSE) ||
3548 (last_ae == I40IW_AE_LLP_CONNECTION_RESET) ||
3552 if (!iwqp->flush_issued) {
3553 iwqp->flush_issued = 1;
3558 spin_unlock_irqrestore(&iwqp->lock, flags);
3559 if (issue_flush && !iwqp->destroyed) {
3560 /* Flush the queues */
3561 i40iw_flush_wqes(iwdev, iwqp);
3563 if (qp->term_flags && iwqp->ibqp.event_handler) {
3564 ibevent.device = iwqp->ibqp.device;
3565 ibevent.event = (qp->eventtype == TERM_EVENT_QP_FATAL) ?
3566 IB_EVENT_QP_FATAL : IB_EVENT_QP_ACCESS_ERR;
3567 ibevent.element.qp = &iwqp->ibqp;
3568 iwqp->ibqp.event_handler(&ibevent, iwqp->ibqp.qp_context);
3572 if (cm_id && cm_id->event_handler) {
3573 if (issue_disconn) {
3574 ret = i40iw_send_cm_event(NULL,
3576 IW_CM_EVENT_DISCONNECT,
3580 i40iw_debug(&iwdev->sc_dev,
3582 "disconnect event failed %s: - cm_id = %p\n",
3586 i40iw_qp_disconnect(iwqp);
3587 cm_id->provider_data = iwqp;
3588 ret = i40iw_send_cm_event(NULL, cm_id, IW_CM_EVENT_CLOSE, 0);
3590 i40iw_debug(&iwdev->sc_dev,
3592 "close event failed %s: - cm_id = %p\n",
3594 cm_id->rem_ref(cm_id);
3600 * i40iw_disconnect_worker - worker for connection close
3601 * @work: points or disconn structure
3603 static void i40iw_disconnect_worker(struct work_struct *work)
3605 struct disconn_work *dwork = container_of(work, struct disconn_work, work);
3606 struct i40iw_qp *iwqp = dwork->iwqp;
3609 i40iw_cm_disconn_true(iwqp);
3610 i40iw_rem_ref(&iwqp->ibqp);
3614 * i40iw_accept - registered call for connection to be accepted
3615 * @cm_id: cm information for passive connection
3616 * @conn_param: accpet parameters
3618 int i40iw_accept(struct iw_cm_id *cm_id, struct iw_cm_conn_param *conn_param)
3621 struct i40iw_qp *iwqp;
3622 struct i40iw_device *iwdev;
3623 struct i40iw_sc_dev *dev;
3624 struct i40iw_cm_core *cm_core;
3625 struct i40iw_cm_node *cm_node;
3626 struct ib_qp_attr attr;
3629 struct i40iw_pd *iwpd;
3631 struct i40iw_kmem_info accept;
3632 enum i40iw_status_code status;
3634 unsigned long flags;
3636 memset(&attr, 0, sizeof(attr));
3637 ibqp = i40iw_get_qp(cm_id->device, conn_param->qpn);
3641 iwqp = to_iwqp(ibqp);
3642 iwdev = iwqp->iwdev;
3643 dev = &iwdev->sc_dev;
3644 cm_core = &iwdev->cm_core;
3645 cm_node = (struct i40iw_cm_node *)cm_id->provider_data;
3647 if (((struct sockaddr_in *)&cm_id->local_addr)->sin_family == AF_INET) {
3648 cm_node->ipv4 = true;
3649 cm_node->vlan_id = i40iw_get_vlan_ipv4(cm_node->loc_addr);
3651 cm_node->ipv4 = false;
3652 i40iw_netdev_vlan_ipv6(cm_node->loc_addr, &cm_node->vlan_id);
3654 i40iw_debug(cm_node->dev,
3656 "Accept vlan_id=%d\n",
3658 if (cm_node->state == I40IW_CM_STATE_LISTENER_DESTROYED) {
3659 if (cm_node->loopbackpartner)
3660 i40iw_rem_ref_cm_node(cm_node->loopbackpartner);
3661 i40iw_rem_ref_cm_node(cm_node);
3665 passive_state = atomic_add_return(1, &cm_node->passive_state);
3666 if (passive_state == I40IW_SEND_RESET_EVENT) {
3667 i40iw_rem_ref_cm_node(cm_node);
3671 cm_node->cm_core->stats_accepts++;
3672 iwqp->cm_node = (void *)cm_node;
3673 cm_node->iwqp = iwqp;
3675 buf_len = conn_param->private_data_len + I40IW_MAX_IETF_SIZE;
3677 status = i40iw_allocate_dma_mem(dev->hw, &iwqp->ietf_mem, buf_len, 1);
3681 cm_node->pdata.size = conn_param->private_data_len;
3682 accept.addr = iwqp->ietf_mem.va;
3683 accept.size = i40iw_cm_build_mpa_frame(cm_node, &accept, MPA_KEY_REPLY);
3684 memcpy(accept.addr + accept.size, conn_param->private_data,
3685 conn_param->private_data_len);
3687 /* setup our first outgoing iWarp send WQE (the IETF frame response) */
3688 if ((cm_node->ipv4 &&
3689 !i40iw_ipv4_is_loopback(cm_node->loc_addr[0], cm_node->rem_addr[0])) ||
3691 !i40iw_ipv6_is_loopback(cm_node->loc_addr, cm_node->rem_addr))) {
3693 tagged_offset = (uintptr_t)iwqp->ietf_mem.va;
3694 ibmr = i40iw_reg_phys_mr(&iwpd->ibpd,
3697 IB_ACCESS_LOCAL_WRITE,
3700 i40iw_free_dma_mem(dev->hw, &iwqp->ietf_mem);
3704 ibmr->pd = &iwpd->ibpd;
3705 ibmr->device = iwpd->ibpd.device;
3706 iwqp->lsmm_mr = ibmr;
3708 iwqp->sc_qp.qp_uk.sq_base = kmap(iwqp->page);
3709 dev->iw_priv_qp_ops->qp_send_lsmm(&iwqp->sc_qp,
3711 (accept.size + conn_param->private_data_len),
3716 iwqp->sc_qp.qp_uk.sq_base = kmap(iwqp->page);
3717 dev->iw_priv_qp_ops->qp_send_lsmm(&iwqp->sc_qp, NULL, 0, 0);
3723 iwqp->cm_id = cm_id;
3724 cm_node->cm_id = cm_id;
3726 cm_id->provider_data = (void *)iwqp;
3727 iwqp->active_conn = 0;
3729 cm_node->lsmm_size = accept.size + conn_param->private_data_len;
3730 i40iw_cm_init_tsa_conn(iwqp, cm_node);
3731 cm_id->add_ref(cm_id);
3732 i40iw_add_ref(&iwqp->ibqp);
3734 attr.qp_state = IB_QPS_RTS;
3735 cm_node->qhash_set = false;
3736 i40iw_modify_qp(&iwqp->ibqp, &attr, IB_QP_STATE, NULL);
3738 cm_node->accelerated = true;
3739 spin_lock_irqsave(&cm_core->ht_lock, flags);
3740 list_move_tail(&cm_node->list, &cm_core->accelerated_list);
3741 spin_unlock_irqrestore(&cm_core->ht_lock, flags);
3744 i40iw_send_cm_event(cm_node, cm_id, IW_CM_EVENT_ESTABLISHED, 0);
3746 i40iw_debug(dev, I40IW_DEBUG_CM, "error sending cm event - ESTABLISHED\n");
3748 if (cm_node->loopbackpartner) {
3749 cm_node->loopbackpartner->pdata.size = conn_param->private_data_len;
3751 /* copy entire MPA frame to our cm_node's frame */
3752 memcpy(cm_node->loopbackpartner->pdata_buf,
3753 conn_param->private_data,
3754 conn_param->private_data_len);
3755 i40iw_create_event(cm_node->loopbackpartner, I40IW_CM_EVENT_CONNECTED);
3758 if (cm_node->accept_pend) {
3759 atomic_dec(&cm_node->listener->pend_accepts_cnt);
3760 cm_node->accept_pend = 0;
3766 * i40iw_reject - registered call for connection to be rejected
3767 * @cm_id: cm information for passive connection
3768 * @pdata: private data to be sent
3769 * @pdata_len: private data length
3771 int i40iw_reject(struct iw_cm_id *cm_id, const void *pdata, u8 pdata_len)
3773 struct i40iw_device *iwdev;
3774 struct i40iw_cm_node *cm_node;
3775 struct i40iw_cm_node *loopback;
3777 cm_node = (struct i40iw_cm_node *)cm_id->provider_data;
3778 loopback = cm_node->loopbackpartner;
3779 cm_node->cm_id = cm_id;
3780 cm_node->pdata.size = pdata_len;
3782 iwdev = to_iwdev(cm_id->device);
3785 cm_node->cm_core->stats_rejects++;
3787 if (pdata_len + sizeof(struct ietf_mpa_v2) > MAX_CM_BUFFER)
3791 memcpy(&loopback->pdata_buf, pdata, pdata_len);
3792 loopback->pdata.size = pdata_len;
3795 return i40iw_cm_reject(cm_node, pdata, pdata_len);
3799 * i40iw_connect - registered call for connection to be established
3800 * @cm_id: cm information for passive connection
3801 * @conn_param: Information about the connection
3803 int i40iw_connect(struct iw_cm_id *cm_id, struct iw_cm_conn_param *conn_param)
3806 struct i40iw_qp *iwqp;
3807 struct i40iw_device *iwdev;
3808 struct i40iw_cm_node *cm_node;
3809 struct i40iw_cm_info cm_info;
3810 struct sockaddr_in *laddr;
3811 struct sockaddr_in *raddr;
3812 struct sockaddr_in6 *laddr6;
3813 struct sockaddr_in6 *raddr6;
3816 ibqp = i40iw_get_qp(cm_id->device, conn_param->qpn);
3819 iwqp = to_iwqp(ibqp);
3822 iwdev = to_iwdev(iwqp->ibqp.device);
3826 laddr = (struct sockaddr_in *)&cm_id->m_local_addr;
3827 raddr = (struct sockaddr_in *)&cm_id->m_remote_addr;
3828 laddr6 = (struct sockaddr_in6 *)&cm_id->m_local_addr;
3829 raddr6 = (struct sockaddr_in6 *)&cm_id->m_remote_addr;
3831 if (!(laddr->sin_port) || !(raddr->sin_port))
3834 iwqp->active_conn = 1;
3836 cm_id->provider_data = iwqp;
3838 /* set up the connection params for the node */
3839 if (cm_id->remote_addr.ss_family == AF_INET) {
3840 cm_info.ipv4 = true;
3841 memset(cm_info.loc_addr, 0, sizeof(cm_info.loc_addr));
3842 memset(cm_info.rem_addr, 0, sizeof(cm_info.rem_addr));
3843 cm_info.loc_addr[0] = ntohl(laddr->sin_addr.s_addr);
3844 cm_info.rem_addr[0] = ntohl(raddr->sin_addr.s_addr);
3845 cm_info.loc_port = ntohs(laddr->sin_port);
3846 cm_info.rem_port = ntohs(raddr->sin_port);
3847 cm_info.vlan_id = i40iw_get_vlan_ipv4(cm_info.loc_addr);
3849 cm_info.ipv4 = false;
3850 i40iw_copy_ip_ntohl(cm_info.loc_addr,
3851 laddr6->sin6_addr.in6_u.u6_addr32);
3852 i40iw_copy_ip_ntohl(cm_info.rem_addr,
3853 raddr6->sin6_addr.in6_u.u6_addr32);
3854 cm_info.loc_port = ntohs(laddr6->sin6_port);
3855 cm_info.rem_port = ntohs(raddr6->sin6_port);
3856 i40iw_netdev_vlan_ipv6(cm_info.loc_addr, &cm_info.vlan_id);
3858 cm_info.cm_id = cm_id;
3859 cm_info.tos = cm_id->tos;
3860 cm_info.user_pri = rt_tos2priority(cm_id->tos);
3861 i40iw_debug(&iwdev->sc_dev, I40IW_DEBUG_DCB, "%s TOS:[%d] UP:[%d]\n",
3862 __func__, cm_id->tos, cm_info.user_pri);
3863 cm_id->add_ref(cm_id);
3864 cm_node = i40iw_create_cm_node(&iwdev->cm_core, iwdev,
3865 conn_param, &cm_info);
3867 if (IS_ERR(cm_node)) {
3868 ret = PTR_ERR(cm_node);
3869 cm_id->rem_ref(cm_id);
3873 if ((cm_info.ipv4 && (laddr->sin_addr.s_addr != raddr->sin_addr.s_addr)) ||
3874 (!cm_info.ipv4 && memcmp(laddr6->sin6_addr.in6_u.u6_addr32,
3875 raddr6->sin6_addr.in6_u.u6_addr32,
3876 sizeof(laddr6->sin6_addr.in6_u.u6_addr32)))) {
3877 if (i40iw_manage_qhash(iwdev, &cm_info, I40IW_QHASH_TYPE_TCP_ESTABLISHED,
3878 I40IW_QHASH_MANAGE_TYPE_ADD, NULL, true)) {
3882 cm_node->qhash_set = true;
3885 if (i40iw_manage_apbvt(iwdev, cm_info.loc_port,
3886 I40IW_MANAGE_APBVT_ADD)) {
3891 cm_node->apbvt_set = true;
3892 iwqp->cm_node = cm_node;
3893 cm_node->iwqp = iwqp;
3894 iwqp->cm_id = cm_id;
3895 i40iw_add_ref(&iwqp->ibqp);
3897 if (cm_node->state != I40IW_CM_STATE_OFFLOADED) {
3898 cm_node->state = I40IW_CM_STATE_SYN_SENT;
3899 ret = i40iw_send_syn(cm_node, 0);
3904 if (cm_node->loopbackpartner) {
3905 cm_node->loopbackpartner->state = I40IW_CM_STATE_MPAREQ_RCVD;
3906 i40iw_create_event(cm_node->loopbackpartner,
3907 I40IW_CM_EVENT_MPA_REQ);
3910 i40iw_debug(cm_node->dev,
3912 "Api - connect(): port=0x%04x, cm_node=%p, cm_id = %p.\n",
3921 i40iw_debug(&iwdev->sc_dev,
3923 "Api - connect() FAILED: dest addr=%pI4",
3926 i40iw_debug(&iwdev->sc_dev,
3928 "Api - connect() FAILED: dest addr=%pI6",
3931 i40iw_rem_ref_cm_node(cm_node);
3932 cm_id->rem_ref(cm_id);
3933 iwdev->cm_core.stats_connect_errs++;
3938 * i40iw_create_listen - registered call creating listener
3939 * @cm_id: cm information for passive connection
3940 * @backlog: to max accept pending count
3942 int i40iw_create_listen(struct iw_cm_id *cm_id, int backlog)
3944 struct i40iw_device *iwdev;
3945 struct i40iw_cm_listener *cm_listen_node;
3946 struct i40iw_cm_info cm_info;
3947 enum i40iw_status_code ret;
3948 struct sockaddr_in *laddr;
3949 struct sockaddr_in6 *laddr6;
3950 bool wildcard = false;
3952 iwdev = to_iwdev(cm_id->device);
3956 laddr = (struct sockaddr_in *)&cm_id->m_local_addr;
3957 laddr6 = (struct sockaddr_in6 *)&cm_id->m_local_addr;
3958 memset(&cm_info, 0, sizeof(cm_info));
3959 if (laddr->sin_family == AF_INET) {
3960 cm_info.ipv4 = true;
3961 cm_info.loc_addr[0] = ntohl(laddr->sin_addr.s_addr);
3962 cm_info.loc_port = ntohs(laddr->sin_port);
3964 if (laddr->sin_addr.s_addr != INADDR_ANY)
3965 cm_info.vlan_id = i40iw_get_vlan_ipv4(cm_info.loc_addr);
3970 cm_info.ipv4 = false;
3971 i40iw_copy_ip_ntohl(cm_info.loc_addr,
3972 laddr6->sin6_addr.in6_u.u6_addr32);
3973 cm_info.loc_port = ntohs(laddr6->sin6_port);
3974 if (ipv6_addr_type(&laddr6->sin6_addr) != IPV6_ADDR_ANY)
3975 i40iw_netdev_vlan_ipv6(cm_info.loc_addr,
3980 cm_info.backlog = backlog;
3981 cm_info.cm_id = cm_id;
3983 cm_listen_node = i40iw_make_listen_node(&iwdev->cm_core, iwdev, &cm_info);
3984 if (!cm_listen_node) {
3985 i40iw_pr_err("cm_listen_node == NULL\n");
3989 cm_id->provider_data = cm_listen_node;
3991 cm_listen_node->tos = cm_id->tos;
3992 cm_listen_node->user_pri = rt_tos2priority(cm_id->tos);
3993 cm_info.user_pri = cm_listen_node->user_pri;
3995 if (!cm_listen_node->reused_node) {
3998 ret = i40iw_add_mqh_4(iwdev,
4002 ret = i40iw_add_mqh_6(iwdev,
4008 ret = i40iw_manage_apbvt(iwdev,
4010 I40IW_MANAGE_APBVT_ADD);
4015 ret = i40iw_manage_qhash(iwdev,
4017 I40IW_QHASH_TYPE_TCP_SYN,
4018 I40IW_QHASH_MANAGE_TYPE_ADD,
4023 cm_listen_node->qhash_set = true;
4024 ret = i40iw_manage_apbvt(iwdev,
4026 I40IW_MANAGE_APBVT_ADD);
4031 cm_id->add_ref(cm_id);
4032 cm_listen_node->cm_core->stats_listen_created++;
4035 i40iw_cm_del_listen(&iwdev->cm_core, (void *)cm_listen_node, false);
4040 * i40iw_destroy_listen - registered call to destroy listener
4041 * @cm_id: cm information for passive connection
4043 int i40iw_destroy_listen(struct iw_cm_id *cm_id)
4045 struct i40iw_device *iwdev;
4047 iwdev = to_iwdev(cm_id->device);
4048 if (cm_id->provider_data)
4049 i40iw_cm_del_listen(&iwdev->cm_core, cm_id->provider_data, true);
4051 i40iw_pr_err("cm_id->provider_data was NULL\n");
4053 cm_id->rem_ref(cm_id);
4059 * i40iw_cm_event_connected - handle connected active node
4060 * @event: the info for cm_node of connection
4062 static void i40iw_cm_event_connected(struct i40iw_cm_event *event)
4064 struct i40iw_qp *iwqp;
4065 struct i40iw_device *iwdev;
4066 struct i40iw_cm_core *cm_core;
4067 struct i40iw_cm_node *cm_node;
4068 struct i40iw_sc_dev *dev;
4069 struct ib_qp_attr attr;
4070 struct iw_cm_id *cm_id;
4071 unsigned long flags;
4075 cm_node = event->cm_node;
4076 cm_id = cm_node->cm_id;
4077 iwqp = (struct i40iw_qp *)cm_id->provider_data;
4078 iwdev = to_iwdev(iwqp->ibqp.device);
4079 dev = &iwdev->sc_dev;
4080 cm_core = &iwdev->cm_core;
4082 if (iwqp->destroyed) {
4083 status = -ETIMEDOUT;
4086 i40iw_cm_init_tsa_conn(iwqp, cm_node);
4087 read0 = (cm_node->send_rdma0_op == SEND_RDMA_READ_ZERO);
4089 iwqp->sc_qp.qp_uk.sq_base = kmap(iwqp->page);
4090 dev->iw_priv_qp_ops->qp_send_rtt(&iwqp->sc_qp, read0);
4094 memset(&attr, 0, sizeof(attr));
4095 attr.qp_state = IB_QPS_RTS;
4096 cm_node->qhash_set = false;
4097 i40iw_modify_qp(&iwqp->ibqp, &attr, IB_QP_STATE, NULL);
4099 cm_node->accelerated = true;
4100 spin_lock_irqsave(&cm_core->ht_lock, flags);
4101 list_move_tail(&cm_node->list, &cm_core->accelerated_list);
4102 spin_unlock_irqrestore(&cm_core->ht_lock, flags);
4103 status = i40iw_send_cm_event(cm_node, cm_id, IW_CM_EVENT_CONNECT_REPLY,
4106 i40iw_debug(dev, I40IW_DEBUG_CM, "error sending cm event - CONNECT_REPLY\n");
4112 cm_id->provider_data = NULL;
4113 i40iw_send_cm_event(event->cm_node,
4115 IW_CM_EVENT_CONNECT_REPLY,
4117 cm_id->rem_ref(cm_id);
4118 i40iw_rem_ref_cm_node(event->cm_node);
4122 * i40iw_cm_event_reset - handle reset
4123 * @event: the info for cm_node of connection
4125 static void i40iw_cm_event_reset(struct i40iw_cm_event *event)
4127 struct i40iw_cm_node *cm_node = event->cm_node;
4128 struct iw_cm_id *cm_id = cm_node->cm_id;
4129 struct i40iw_qp *iwqp;
4134 iwqp = cm_id->provider_data;
4138 i40iw_debug(cm_node->dev,
4140 "reset event %p - cm_id = %p\n",
4141 event->cm_node, cm_id);
4144 i40iw_send_cm_event(cm_node, cm_node->cm_id, IW_CM_EVENT_DISCONNECT, -ECONNRESET);
4145 i40iw_send_cm_event(cm_node, cm_node->cm_id, IW_CM_EVENT_CLOSE, 0);
4149 * i40iw_cm_event_handler - worker thread callback to send event to cm upper layer
4150 * @work: pointer of cm event info.
4152 static void i40iw_cm_event_handler(struct work_struct *work)
4154 struct i40iw_cm_event *event = container_of(work,
4155 struct i40iw_cm_event,
4157 struct i40iw_cm_node *cm_node;
4159 if (!event || !event->cm_node || !event->cm_node->cm_core)
4162 cm_node = event->cm_node;
4164 switch (event->type) {
4165 case I40IW_CM_EVENT_MPA_REQ:
4166 i40iw_send_cm_event(cm_node,
4168 IW_CM_EVENT_CONNECT_REQUEST,
4171 case I40IW_CM_EVENT_RESET:
4172 i40iw_cm_event_reset(event);
4174 case I40IW_CM_EVENT_CONNECTED:
4175 if (!event->cm_node->cm_id ||
4176 (event->cm_node->state != I40IW_CM_STATE_OFFLOADED))
4178 i40iw_cm_event_connected(event);
4180 case I40IW_CM_EVENT_MPA_REJECT:
4181 if (!event->cm_node->cm_id ||
4182 (cm_node->state == I40IW_CM_STATE_OFFLOADED))
4184 i40iw_send_cm_event(cm_node,
4186 IW_CM_EVENT_CONNECT_REPLY,
4189 case I40IW_CM_EVENT_ABORTED:
4190 if (!event->cm_node->cm_id ||
4191 (event->cm_node->state == I40IW_CM_STATE_OFFLOADED))
4193 i40iw_event_connect_error(event);
4196 i40iw_pr_err("event type = %d\n", event->type);
4200 event->cm_info.cm_id->rem_ref(event->cm_info.cm_id);
4201 i40iw_rem_ref_cm_node(event->cm_node);
4206 * i40iw_cm_post_event - queue event request for worker thread
4207 * @event: cm node's info for up event call
4209 static void i40iw_cm_post_event(struct i40iw_cm_event *event)
4211 atomic_inc(&event->cm_node->ref_count);
4212 event->cm_info.cm_id->add_ref(event->cm_info.cm_id);
4213 INIT_WORK(&event->event_work, i40iw_cm_event_handler);
4215 queue_work(event->cm_node->cm_core->event_wq, &event->event_work);
4219 * i40iw_qhash_ctrl - enable/disable qhash for list
4220 * @iwdev: device pointer
4221 * @parent_listen_node: parent listen node
4222 * @nfo: cm info node
4223 * @ipaddr: Pointer to IPv4 or IPv6 address
4224 * @ipv4: flag indicating IPv4 when true
4225 * @ifup: flag indicating interface up when true
4227 * Enables or disables the qhash for the node in the child
4228 * listen list that matches ipaddr. If no matching IP was found
4229 * it will allocate and add a new child listen node to the
4230 * parent listen node. The listen_list_lock is assumed to be
4233 static void i40iw_qhash_ctrl(struct i40iw_device *iwdev,
4234 struct i40iw_cm_listener *parent_listen_node,
4235 struct i40iw_cm_info *nfo,
4236 u32 *ipaddr, bool ipv4, bool ifup)
4238 struct list_head *child_listen_list = &parent_listen_node->child_listen_list;
4239 struct i40iw_cm_listener *child_listen_node;
4240 struct list_head *pos, *tpos;
4241 enum i40iw_status_code ret;
4242 bool node_allocated = false;
4243 enum i40iw_quad_hash_manage_type op =
4244 ifup ? I40IW_QHASH_MANAGE_TYPE_ADD : I40IW_QHASH_MANAGE_TYPE_DELETE;
4246 list_for_each_safe(pos, tpos, child_listen_list) {
4249 struct i40iw_cm_listener,
4251 if (!memcmp(child_listen_node->loc_addr, ipaddr, ipv4 ? 4 : 16))
4255 /* if not found then add a child listener if interface is going up */
4258 child_listen_node = kzalloc(sizeof(*child_listen_node), GFP_ATOMIC);
4259 if (!child_listen_node)
4261 node_allocated = true;
4262 memcpy(child_listen_node, parent_listen_node, sizeof(*child_listen_node));
4264 memcpy(child_listen_node->loc_addr, ipaddr, ipv4 ? 4 : 16);
4267 memcpy(nfo->loc_addr,
4268 child_listen_node->loc_addr,
4269 sizeof(nfo->loc_addr));
4270 nfo->vlan_id = child_listen_node->vlan_id;
4271 ret = i40iw_manage_qhash(iwdev, nfo,
4272 I40IW_QHASH_TYPE_TCP_SYN,
4276 child_listen_node->qhash_set = ifup;
4278 list_add(&child_listen_node->child_listen_list,
4279 &parent_listen_node->child_listen_list);
4280 } else if (node_allocated) {
4281 kfree(child_listen_node);
4286 * i40iw_cm_teardown_connections - teardown QPs
4287 * @iwdev: device pointer
4288 * @ipaddr: Pointer to IPv4 or IPv6 address
4289 * @ipv4: flag indicating IPv4 when true
4290 * @disconnect_all: flag indicating disconnect all QPs
4291 * teardown QPs where source or destination addr matches ip addr
4293 void i40iw_cm_teardown_connections(struct i40iw_device *iwdev, u32 *ipaddr,
4294 struct i40iw_cm_info *nfo,
4295 bool disconnect_all)
4297 struct i40iw_cm_core *cm_core = &iwdev->cm_core;
4298 struct list_head *list_core_temp;
4299 struct list_head *list_node;
4300 struct i40iw_cm_node *cm_node;
4301 unsigned long flags;
4302 struct list_head teardown_list;
4303 struct ib_qp_attr attr;
4305 INIT_LIST_HEAD(&teardown_list);
4306 spin_lock_irqsave(&cm_core->ht_lock, flags);
4307 list_for_each_safe(list_node, list_core_temp,
4308 &cm_core->accelerated_list) {
4309 cm_node = container_of(list_node, struct i40iw_cm_node, list);
4310 if (disconnect_all ||
4311 (nfo->vlan_id == cm_node->vlan_id &&
4312 (!memcmp(cm_node->loc_addr, ipaddr, nfo->ipv4 ? 4 : 16) ||
4313 !memcmp(cm_node->rem_addr, ipaddr, nfo->ipv4 ? 4 : 16)))) {
4314 atomic_inc(&cm_node->ref_count);
4315 list_add(&cm_node->teardown_entry, &teardown_list);
4318 list_for_each_safe(list_node, list_core_temp,
4319 &cm_core->non_accelerated_list) {
4320 cm_node = container_of(list_node, struct i40iw_cm_node, list);
4321 if (disconnect_all ||
4322 (nfo->vlan_id == cm_node->vlan_id &&
4323 (!memcmp(cm_node->loc_addr, ipaddr, nfo->ipv4 ? 4 : 16) ||
4324 !memcmp(cm_node->rem_addr, ipaddr, nfo->ipv4 ? 4 : 16)))) {
4325 atomic_inc(&cm_node->ref_count);
4326 list_add(&cm_node->teardown_entry, &teardown_list);
4329 spin_unlock_irqrestore(&cm_core->ht_lock, flags);
4331 list_for_each_safe(list_node, list_core_temp, &teardown_list) {
4332 cm_node = container_of(list_node, struct i40iw_cm_node,
4334 attr.qp_state = IB_QPS_ERR;
4335 i40iw_modify_qp(&cm_node->iwqp->ibqp, &attr, IB_QP_STATE, NULL);
4337 i40iw_cm_disconn(cm_node->iwqp);
4338 i40iw_rem_ref_cm_node(cm_node);
4343 * i40iw_ifdown_notify - process an ifdown on an interface
4344 * @iwdev: device pointer
4345 * @ipaddr: Pointer to IPv4 or IPv6 address
4346 * @ipv4: flag indicating IPv4 when true
4347 * @ifup: flag indicating interface up when true
4349 void i40iw_if_notify(struct i40iw_device *iwdev, struct net_device *netdev,
4350 u32 *ipaddr, bool ipv4, bool ifup)
4352 struct i40iw_cm_core *cm_core = &iwdev->cm_core;
4353 unsigned long flags;
4354 struct i40iw_cm_listener *listen_node;
4355 static const u32 ip_zero[4] = { 0, 0, 0, 0 };
4356 struct i40iw_cm_info nfo;
4357 u16 vlan_id = rdma_vlan_dev_vlan_id(netdev);
4358 enum i40iw_status_code ret;
4359 enum i40iw_quad_hash_manage_type op =
4360 ifup ? I40IW_QHASH_MANAGE_TYPE_ADD : I40IW_QHASH_MANAGE_TYPE_DELETE;
4362 nfo.vlan_id = vlan_id;
4365 /* Disable or enable qhash for listeners */
4366 spin_lock_irqsave(&cm_core->listen_list_lock, flags);
4367 list_for_each_entry(listen_node, &cm_core->listen_nodes, list) {
4368 if (vlan_id == listen_node->vlan_id &&
4369 (!memcmp(listen_node->loc_addr, ipaddr, ipv4 ? 4 : 16) ||
4370 !memcmp(listen_node->loc_addr, ip_zero, ipv4 ? 4 : 16))) {
4371 memcpy(nfo.loc_addr, listen_node->loc_addr,
4372 sizeof(nfo.loc_addr));
4373 nfo.loc_port = listen_node->loc_port;
4374 nfo.user_pri = listen_node->user_pri;
4375 if (!list_empty(&listen_node->child_listen_list)) {
4376 i40iw_qhash_ctrl(iwdev,
4379 ipaddr, ipv4, ifup);
4380 } else if (memcmp(listen_node->loc_addr, ip_zero,
4382 ret = i40iw_manage_qhash(iwdev,
4384 I40IW_QHASH_TYPE_TCP_SYN,
4389 listen_node->qhash_set = ifup;
4393 spin_unlock_irqrestore(&cm_core->listen_list_lock, flags);
4395 /* teardown connected qp's on ifdown */
4397 i40iw_cm_teardown_connections(iwdev, ipaddr, &nfo, false);