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
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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>
61 #include <asm/checksum.h>
65 static void i40iw_rem_ref_cm_node(struct i40iw_cm_node *);
66 static void i40iw_cm_post_event(struct i40iw_cm_event *event);
67 static void i40iw_disconnect_worker(struct work_struct *work);
70 * i40iw_free_sqbuf - put back puda buffer if refcount = 0
71 * @vsi: pointer to vsi structure
72 * @buf: puda buffer to free
74 void i40iw_free_sqbuf(struct i40iw_sc_vsi *vsi, void *bufp)
76 struct i40iw_puda_buf *buf = (struct i40iw_puda_buf *)bufp;
77 struct i40iw_puda_rsrc *ilq = vsi->ilq;
79 if (!atomic_dec_return(&buf->refcount))
80 i40iw_puda_ret_bufpool(ilq, buf);
84 * i40iw_derive_hw_ird_setting - Calculate IRD
86 * @cm_ird: IRD of connection's node
88 * The ird from the connection is rounded to a supported HW
89 * setting (2,8,32,64) and then encoded for ird_size field of
92 static u8 i40iw_derive_hw_ird_setting(u16 cm_ird)
97 /* round-off to next powerof2 */
98 while (pof2_cm_ird < cm_ird)
101 /* ird_size field is encoded in qp_ctx */
102 switch (pof2_cm_ird) {
103 case I40IW_HW_IRD_SETTING_64:
104 encoded_ird_size = 3;
106 case I40IW_HW_IRD_SETTING_32:
107 case I40IW_HW_IRD_SETTING_16:
108 encoded_ird_size = 2;
110 case I40IW_HW_IRD_SETTING_8:
111 case I40IW_HW_IRD_SETTING_4:
112 encoded_ird_size = 1;
114 case I40IW_HW_IRD_SETTING_2:
116 encoded_ird_size = 0;
119 return encoded_ird_size;
123 * i40iw_record_ird_ord - Record IRD/ORD passed in
124 * @cm_node: connection's node
125 * @conn_ird: connection IRD
126 * @conn_ord: connection ORD
128 static void i40iw_record_ird_ord(struct i40iw_cm_node *cm_node, u16 conn_ird, u16 conn_ord)
130 if (conn_ird > I40IW_MAX_IRD_SIZE)
131 conn_ird = I40IW_MAX_IRD_SIZE;
133 if (conn_ord > I40IW_MAX_ORD_SIZE)
134 conn_ord = I40IW_MAX_ORD_SIZE;
136 cm_node->ird_size = conn_ird;
137 cm_node->ord_size = conn_ord;
141 * i40iw_copy_ip_ntohl - change network to host ip
145 void i40iw_copy_ip_ntohl(u32 *dst, __be32 *src)
147 *dst++ = ntohl(*src++);
148 *dst++ = ntohl(*src++);
149 *dst++ = ntohl(*src++);
154 * i40iw_copy_ip_htonl - change host addr to network ip
156 * @src: little endian
158 static inline void i40iw_copy_ip_htonl(__be32 *dst, u32 *src)
160 *dst++ = htonl(*src++);
161 *dst++ = htonl(*src++);
162 *dst++ = htonl(*src++);
167 * i40iw_fill_sockaddr4 - get addr info for passive connection
168 * @cm_node: connection's node
169 * @event: upper layer's cm event
171 static inline void i40iw_fill_sockaddr4(struct i40iw_cm_node *cm_node,
172 struct iw_cm_event *event)
174 struct sockaddr_in *laddr = (struct sockaddr_in *)&event->local_addr;
175 struct sockaddr_in *raddr = (struct sockaddr_in *)&event->remote_addr;
177 laddr->sin_family = AF_INET;
178 raddr->sin_family = AF_INET;
180 laddr->sin_port = htons(cm_node->loc_port);
181 raddr->sin_port = htons(cm_node->rem_port);
183 laddr->sin_addr.s_addr = htonl(cm_node->loc_addr[0]);
184 raddr->sin_addr.s_addr = htonl(cm_node->rem_addr[0]);
188 * i40iw_fill_sockaddr6 - get ipv6 addr info for passive side
189 * @cm_node: connection's node
190 * @event: upper layer's cm event
192 static inline void i40iw_fill_sockaddr6(struct i40iw_cm_node *cm_node,
193 struct iw_cm_event *event)
195 struct sockaddr_in6 *laddr6 = (struct sockaddr_in6 *)&event->local_addr;
196 struct sockaddr_in6 *raddr6 = (struct sockaddr_in6 *)&event->remote_addr;
198 laddr6->sin6_family = AF_INET6;
199 raddr6->sin6_family = AF_INET6;
201 laddr6->sin6_port = htons(cm_node->loc_port);
202 raddr6->sin6_port = htons(cm_node->rem_port);
204 i40iw_copy_ip_htonl(laddr6->sin6_addr.in6_u.u6_addr32,
206 i40iw_copy_ip_htonl(raddr6->sin6_addr.in6_u.u6_addr32,
211 * i40iw_get_addr_info
212 * @cm_node: contains ip/tcp info
213 * @cm_info: to get a copy of the cm_node ip/tcp info
215 static void i40iw_get_addr_info(struct i40iw_cm_node *cm_node,
216 struct i40iw_cm_info *cm_info)
218 cm_info->ipv4 = cm_node->ipv4;
219 cm_info->vlan_id = cm_node->vlan_id;
220 memcpy(cm_info->loc_addr, cm_node->loc_addr, sizeof(cm_info->loc_addr));
221 memcpy(cm_info->rem_addr, cm_node->rem_addr, sizeof(cm_info->rem_addr));
222 cm_info->loc_port = cm_node->loc_port;
223 cm_info->rem_port = cm_node->rem_port;
224 cm_info->user_pri = cm_node->user_pri;
228 * i40iw_get_cmevent_info - for cm event upcall
229 * @cm_node: connection's node
230 * @cm_id: upper layers cm struct for the event
231 * @event: upper layer's cm event
233 static inline void i40iw_get_cmevent_info(struct i40iw_cm_node *cm_node,
234 struct iw_cm_id *cm_id,
235 struct iw_cm_event *event)
237 memcpy(&event->local_addr, &cm_id->m_local_addr,
238 sizeof(event->local_addr));
239 memcpy(&event->remote_addr, &cm_id->m_remote_addr,
240 sizeof(event->remote_addr));
242 event->private_data = (void *)cm_node->pdata_buf;
243 event->private_data_len = (u8)cm_node->pdata.size;
244 event->ird = cm_node->ird_size;
245 event->ord = cm_node->ord_size;
250 * i40iw_send_cm_event - upcall cm's event handler
251 * @cm_node: connection's node
252 * @cm_id: upper layer's cm info struct
253 * @type: Event type to indicate
254 * @status: status for the event type
256 static int i40iw_send_cm_event(struct i40iw_cm_node *cm_node,
257 struct iw_cm_id *cm_id,
258 enum iw_cm_event_type type,
261 struct iw_cm_event event;
263 memset(&event, 0, sizeof(event));
265 event.status = status;
267 case IW_CM_EVENT_CONNECT_REQUEST:
269 i40iw_fill_sockaddr4(cm_node, &event);
271 i40iw_fill_sockaddr6(cm_node, &event);
272 event.provider_data = (void *)cm_node;
273 event.private_data = (void *)cm_node->pdata_buf;
274 event.private_data_len = (u8)cm_node->pdata.size;
275 event.ird = cm_node->ird_size;
277 case IW_CM_EVENT_CONNECT_REPLY:
278 i40iw_get_cmevent_info(cm_node, cm_id, &event);
280 case IW_CM_EVENT_ESTABLISHED:
281 event.ird = cm_node->ird_size;
282 event.ord = cm_node->ord_size;
284 case IW_CM_EVENT_DISCONNECT:
286 case IW_CM_EVENT_CLOSE:
289 i40iw_pr_err("event type received type = %d\n", type);
292 return cm_id->event_handler(cm_id, &event);
296 * i40iw_create_event - create cm event
297 * @cm_node: connection's node
298 * @type: Event type to generate
300 static struct i40iw_cm_event *i40iw_create_event(struct i40iw_cm_node *cm_node,
301 enum i40iw_cm_event_type type)
303 struct i40iw_cm_event *event;
308 event = kzalloc(sizeof(*event), GFP_ATOMIC);
314 event->cm_node = cm_node;
315 memcpy(event->cm_info.rem_addr, cm_node->rem_addr, sizeof(event->cm_info.rem_addr));
316 memcpy(event->cm_info.loc_addr, cm_node->loc_addr, sizeof(event->cm_info.loc_addr));
317 event->cm_info.rem_port = cm_node->rem_port;
318 event->cm_info.loc_port = cm_node->loc_port;
319 event->cm_info.cm_id = cm_node->cm_id;
321 i40iw_debug(cm_node->dev,
323 "node=%p event=%p type=%u dst=%pI4 src=%pI4\n",
327 event->cm_info.loc_addr,
328 event->cm_info.rem_addr);
330 i40iw_cm_post_event(event);
335 * i40iw_free_retrans_entry - free send entry
336 * @cm_node: connection's node
338 static void i40iw_free_retrans_entry(struct i40iw_cm_node *cm_node)
340 struct i40iw_device *iwdev = cm_node->iwdev;
341 struct i40iw_timer_entry *send_entry;
343 send_entry = cm_node->send_entry;
345 cm_node->send_entry = NULL;
346 i40iw_free_sqbuf(&iwdev->vsi, (void *)send_entry->sqbuf);
348 atomic_dec(&cm_node->ref_count);
353 * i40iw_cleanup_retrans_entry - free send entry with lock
354 * @cm_node: connection's node
356 static void i40iw_cleanup_retrans_entry(struct i40iw_cm_node *cm_node)
360 spin_lock_irqsave(&cm_node->retrans_list_lock, flags);
361 i40iw_free_retrans_entry(cm_node);
362 spin_unlock_irqrestore(&cm_node->retrans_list_lock, flags);
366 * i40iw_form_cm_frame - get a free packet and build frame
367 * @cm_node: connection's node ionfo to use in frame
368 * @options: pointer to options info
369 * @hdr: pointer mpa header
370 * @pdata: pointer to private data
371 * @flags: indicates FIN or ACK
373 static struct i40iw_puda_buf *i40iw_form_cm_frame(struct i40iw_cm_node *cm_node,
374 struct i40iw_kmem_info *options,
375 struct i40iw_kmem_info *hdr,
376 struct i40iw_kmem_info *pdata,
379 struct i40iw_puda_buf *sqbuf;
380 struct i40iw_sc_vsi *vsi = &cm_node->iwdev->vsi;
385 struct ipv6hdr *ip6h;
388 u16 eth_hlen = ETH_HLEN;
394 sqbuf = i40iw_puda_get_bufpool(vsi->ilq);
400 opts_len = (u32)options->size;
406 pd_len = pdata->size;
408 if (cm_node->vlan_id < VLAN_TAG_PRESENT)
412 packetsize = sizeof(*iph) + sizeof(*tcph);
414 packetsize = sizeof(*ip6h) + sizeof(*tcph);
415 packetsize += opts_len + hdr_len + pd_len;
417 memset(buf, 0x00, eth_hlen + packetsize);
419 sqbuf->totallen = packetsize + eth_hlen;
420 sqbuf->maclen = eth_hlen;
421 sqbuf->tcphlen = sizeof(*tcph) + opts_len;
422 sqbuf->scratch = (void *)cm_node;
424 ethh = (struct ethhdr *)buf;
430 iph = (struct iphdr *)buf;
432 tcph = (struct tcphdr *)buf;
433 buf += sizeof(*tcph);
435 ether_addr_copy(ethh->h_dest, cm_node->rem_mac);
436 ether_addr_copy(ethh->h_source, cm_node->loc_mac);
437 if (cm_node->vlan_id < VLAN_TAG_PRESENT) {
438 ((struct vlan_ethhdr *)ethh)->h_vlan_proto = htons(ETH_P_8021Q);
439 vtag = (cm_node->user_pri << VLAN_PRIO_SHIFT) | cm_node->vlan_id;
440 ((struct vlan_ethhdr *)ethh)->h_vlan_TCI = htons(vtag);
442 ((struct vlan_ethhdr *)ethh)->h_vlan_encapsulated_proto = htons(ETH_P_IP);
444 ethh->h_proto = htons(ETH_P_IP);
447 iph->version = IPVERSION;
448 iph->ihl = 5; /* 5 * 4Byte words, IP headr len */
449 iph->tos = cm_node->tos;
450 iph->tot_len = htons(packetsize);
451 iph->id = htons(++cm_node->tcp_cntxt.loc_id);
453 iph->frag_off = htons(0x4000);
455 iph->protocol = IPPROTO_TCP;
456 iph->saddr = htonl(cm_node->loc_addr[0]);
457 iph->daddr = htonl(cm_node->rem_addr[0]);
460 ip6h = (struct ipv6hdr *)buf;
461 buf += sizeof(*ip6h);
462 tcph = (struct tcphdr *)buf;
463 buf += sizeof(*tcph);
465 ether_addr_copy(ethh->h_dest, cm_node->rem_mac);
466 ether_addr_copy(ethh->h_source, cm_node->loc_mac);
467 if (cm_node->vlan_id < VLAN_TAG_PRESENT) {
468 ((struct vlan_ethhdr *)ethh)->h_vlan_proto = htons(ETH_P_8021Q);
469 vtag = (cm_node->user_pri << VLAN_PRIO_SHIFT) | cm_node->vlan_id;
470 ((struct vlan_ethhdr *)ethh)->h_vlan_TCI = htons(vtag);
471 ((struct vlan_ethhdr *)ethh)->h_vlan_encapsulated_proto = htons(ETH_P_IPV6);
473 ethh->h_proto = htons(ETH_P_IPV6);
476 ip6h->priority = cm_node->tos >> 4;
477 ip6h->flow_lbl[0] = cm_node->tos << 4;
478 ip6h->flow_lbl[1] = 0;
479 ip6h->flow_lbl[2] = 0;
480 ip6h->payload_len = htons(packetsize - sizeof(*ip6h));
482 ip6h->hop_limit = 128;
483 i40iw_copy_ip_htonl(ip6h->saddr.in6_u.u6_addr32,
485 i40iw_copy_ip_htonl(ip6h->daddr.in6_u.u6_addr32,
489 tcph->source = htons(cm_node->loc_port);
490 tcph->dest = htons(cm_node->rem_port);
492 tcph->seq = htonl(cm_node->tcp_cntxt.loc_seq_num);
494 if (flags & SET_ACK) {
495 cm_node->tcp_cntxt.loc_ack_num = cm_node->tcp_cntxt.rcv_nxt;
496 tcph->ack_seq = htonl(cm_node->tcp_cntxt.loc_ack_num);
502 if (flags & SET_SYN) {
503 cm_node->tcp_cntxt.loc_seq_num++;
506 cm_node->tcp_cntxt.loc_seq_num += hdr_len + pd_len;
509 if (flags & SET_FIN) {
510 cm_node->tcp_cntxt.loc_seq_num++;
517 tcph->doff = (u16)((sizeof(*tcph) + opts_len + 3) >> 2);
518 sqbuf->tcphlen = tcph->doff << 2;
519 tcph->window = htons(cm_node->tcp_cntxt.rcv_wnd);
523 memcpy(buf, options->addr, opts_len);
528 memcpy(buf, hdr->addr, hdr_len);
532 if (pdata && pdata->addr)
533 memcpy(buf, pdata->addr, pdata->size);
535 atomic_set(&sqbuf->refcount, 1);
541 * i40iw_send_reset - Send RST packet
542 * @cm_node: connection's node
544 static int i40iw_send_reset(struct i40iw_cm_node *cm_node)
546 struct i40iw_puda_buf *sqbuf;
547 int flags = SET_RST | SET_ACK;
549 sqbuf = i40iw_form_cm_frame(cm_node, NULL, NULL, NULL, flags);
551 i40iw_pr_err("no sqbuf\n");
555 return i40iw_schedule_cm_timer(cm_node, sqbuf, I40IW_TIMER_TYPE_SEND, 0, 1);
559 * i40iw_active_open_err - send event for active side cm error
560 * @cm_node: connection's node
561 * @reset: Flag to send reset or not
563 static void i40iw_active_open_err(struct i40iw_cm_node *cm_node, bool reset)
565 i40iw_cleanup_retrans_entry(cm_node);
566 cm_node->cm_core->stats_connect_errs++;
568 i40iw_debug(cm_node->dev,
570 "%s cm_node=%p state=%d\n",
574 atomic_inc(&cm_node->ref_count);
575 i40iw_send_reset(cm_node);
578 cm_node->state = I40IW_CM_STATE_CLOSED;
579 i40iw_create_event(cm_node, I40IW_CM_EVENT_ABORTED);
583 * i40iw_passive_open_err - handle passive side cm error
584 * @cm_node: connection's node
585 * @reset: send reset or just free cm_node
587 static void i40iw_passive_open_err(struct i40iw_cm_node *cm_node, bool reset)
589 i40iw_cleanup_retrans_entry(cm_node);
590 cm_node->cm_core->stats_passive_errs++;
591 cm_node->state = I40IW_CM_STATE_CLOSED;
592 i40iw_debug(cm_node->dev,
594 "%s cm_node=%p state =%d\n",
599 i40iw_send_reset(cm_node);
601 i40iw_rem_ref_cm_node(cm_node);
605 * i40iw_event_connect_error - to create connect error event
606 * @event: cm information for connect event
608 static void i40iw_event_connect_error(struct i40iw_cm_event *event)
610 struct i40iw_qp *iwqp;
611 struct iw_cm_id *cm_id;
613 cm_id = event->cm_node->cm_id;
617 iwqp = cm_id->provider_data;
619 if (!iwqp || !iwqp->iwdev)
623 cm_id->provider_data = NULL;
624 i40iw_send_cm_event(event->cm_node, cm_id,
625 IW_CM_EVENT_CONNECT_REPLY,
627 cm_id->rem_ref(cm_id);
628 i40iw_rem_ref_cm_node(event->cm_node);
632 * i40iw_process_options
633 * @cm_node: connection's node
634 * @optionsloc: point to start of options
635 * @optionsize: size of all options
636 * @syn_packet: flag if syn packet
638 static int i40iw_process_options(struct i40iw_cm_node *cm_node,
645 union all_known_options *all_options;
646 char got_mss_option = 0;
648 while (offset < optionsize) {
649 all_options = (union all_known_options *)(optionsloc + offset);
650 switch (all_options->as_base.optionnum) {
651 case OPTION_NUMBER_END:
654 case OPTION_NUMBER_NONE:
657 case OPTION_NUMBER_MSS:
658 i40iw_debug(cm_node->dev,
660 "%s: MSS Length: %d Offset: %d Size: %d\n",
662 all_options->as_mss.length,
666 if (all_options->as_mss.length != 4)
668 tmp = ntohs(all_options->as_mss.mss);
669 if (tmp > 0 && tmp < cm_node->tcp_cntxt.mss)
670 cm_node->tcp_cntxt.mss = tmp;
672 case OPTION_NUMBER_WINDOW_SCALE:
673 cm_node->tcp_cntxt.snd_wscale =
674 all_options->as_windowscale.shiftcount;
677 i40iw_debug(cm_node->dev,
679 "TCP Option not understood: %x\n",
680 all_options->as_base.optionnum);
683 offset += all_options->as_base.length;
685 if (!got_mss_option && syn_packet)
686 cm_node->tcp_cntxt.mss = I40IW_CM_DEFAULT_MSS;
691 * i40iw_handle_tcp_options -
692 * @cm_node: connection's node
693 * @tcph: pointer tcp header
694 * @optionsize: size of options rcvd
695 * @passive: active or passive flag
697 static int i40iw_handle_tcp_options(struct i40iw_cm_node *cm_node,
702 u8 *optionsloc = (u8 *)&tcph[1];
705 if (i40iw_process_options(cm_node,
709 i40iw_debug(cm_node->dev,
711 "%s: Node %p, Sending RESET\n",
715 i40iw_passive_open_err(cm_node, true);
717 i40iw_active_open_err(cm_node, true);
722 cm_node->tcp_cntxt.snd_wnd = ntohs(tcph->window) <<
723 cm_node->tcp_cntxt.snd_wscale;
725 if (cm_node->tcp_cntxt.snd_wnd > cm_node->tcp_cntxt.max_snd_wnd)
726 cm_node->tcp_cntxt.max_snd_wnd = cm_node->tcp_cntxt.snd_wnd;
731 * i40iw_build_mpa_v1 - build a MPA V1 frame
732 * @cm_node: connection's node
733 * @mpa_key: to do read0 or write0
735 static void i40iw_build_mpa_v1(struct i40iw_cm_node *cm_node,
739 struct ietf_mpa_v1 *mpa_frame = (struct ietf_mpa_v1 *)start_addr;
742 case MPA_KEY_REQUEST:
743 memcpy(mpa_frame->key, IEFT_MPA_KEY_REQ, IETF_MPA_KEY_SIZE);
746 memcpy(mpa_frame->key, IEFT_MPA_KEY_REP, IETF_MPA_KEY_SIZE);
751 mpa_frame->flags = IETF_MPA_FLAGS_CRC;
752 mpa_frame->rev = cm_node->mpa_frame_rev;
753 mpa_frame->priv_data_len = htons(cm_node->pdata.size);
757 * i40iw_build_mpa_v2 - build a MPA V2 frame
758 * @cm_node: connection's node
759 * @start_addr: buffer start address
760 * @mpa_key: to do read0 or write0
762 static void i40iw_build_mpa_v2(struct i40iw_cm_node *cm_node,
766 struct ietf_mpa_v2 *mpa_frame = (struct ietf_mpa_v2 *)start_addr;
767 struct ietf_rtr_msg *rtr_msg = &mpa_frame->rtr_msg;
768 u16 ctrl_ird, ctrl_ord;
770 /* initialize the upper 5 bytes of the frame */
771 i40iw_build_mpa_v1(cm_node, start_addr, mpa_key);
772 mpa_frame->flags |= IETF_MPA_V2_FLAG;
773 mpa_frame->priv_data_len += htons(IETF_RTR_MSG_SIZE);
775 /* initialize RTR msg */
776 if (cm_node->mpav2_ird_ord == IETF_NO_IRD_ORD) {
777 ctrl_ird = IETF_NO_IRD_ORD;
778 ctrl_ord = IETF_NO_IRD_ORD;
780 ctrl_ird = (cm_node->ird_size > IETF_NO_IRD_ORD) ?
781 IETF_NO_IRD_ORD : cm_node->ird_size;
782 ctrl_ord = (cm_node->ord_size > IETF_NO_IRD_ORD) ?
783 IETF_NO_IRD_ORD : cm_node->ord_size;
786 ctrl_ird |= IETF_PEER_TO_PEER;
789 case MPA_KEY_REQUEST:
790 ctrl_ord |= IETF_RDMA0_WRITE;
791 ctrl_ord |= IETF_RDMA0_READ;
794 switch (cm_node->send_rdma0_op) {
795 case SEND_RDMA_WRITE_ZERO:
796 ctrl_ord |= IETF_RDMA0_WRITE;
798 case SEND_RDMA_READ_ZERO:
799 ctrl_ord |= IETF_RDMA0_READ;
806 rtr_msg->ctrl_ird = htons(ctrl_ird);
807 rtr_msg->ctrl_ord = htons(ctrl_ord);
811 * i40iw_cm_build_mpa_frame - build mpa frame for mpa version 1 or version 2
812 * @cm_node: connection's node
813 * @mpa: mpa: data buffer
814 * @mpa_key: to do read0 or write0
816 static int i40iw_cm_build_mpa_frame(struct i40iw_cm_node *cm_node,
817 struct i40iw_kmem_info *mpa,
822 switch (cm_node->mpa_frame_rev) {
824 hdr_len = sizeof(struct ietf_mpa_v1);
825 i40iw_build_mpa_v1(cm_node, mpa->addr, mpa_key);
828 hdr_len = sizeof(struct ietf_mpa_v2);
829 i40iw_build_mpa_v2(cm_node, mpa->addr, mpa_key);
839 * i40iw_send_mpa_request - active node send mpa request to passive node
840 * @cm_node: connection's node
842 static int i40iw_send_mpa_request(struct i40iw_cm_node *cm_node)
844 struct i40iw_puda_buf *sqbuf;
847 i40iw_pr_err("cm_node == NULL\n");
851 cm_node->mpa_hdr.addr = &cm_node->mpa_frame;
852 cm_node->mpa_hdr.size = i40iw_cm_build_mpa_frame(cm_node,
855 if (!cm_node->mpa_hdr.size) {
856 i40iw_pr_err("mpa size = %d\n", cm_node->mpa_hdr.size);
860 sqbuf = i40iw_form_cm_frame(cm_node,
866 i40iw_pr_err("sq_buf == NULL\n");
869 return i40iw_schedule_cm_timer(cm_node, sqbuf, I40IW_TIMER_TYPE_SEND, 1, 0);
873 * i40iw_send_mpa_reject -
874 * @cm_node: connection's node
875 * @pdata: reject data for connection
876 * @plen: length of reject data
878 static int i40iw_send_mpa_reject(struct i40iw_cm_node *cm_node,
882 struct i40iw_puda_buf *sqbuf;
883 struct i40iw_kmem_info priv_info;
885 cm_node->mpa_hdr.addr = &cm_node->mpa_frame;
886 cm_node->mpa_hdr.size = i40iw_cm_build_mpa_frame(cm_node,
890 cm_node->mpa_frame.flags |= IETF_MPA_FLAGS_REJECT;
891 priv_info.addr = (void *)pdata;
892 priv_info.size = plen;
894 sqbuf = i40iw_form_cm_frame(cm_node,
900 i40iw_pr_err("no sqbuf\n");
903 cm_node->state = I40IW_CM_STATE_FIN_WAIT1;
904 return i40iw_schedule_cm_timer(cm_node, sqbuf, I40IW_TIMER_TYPE_SEND, 1, 0);
908 * recv_mpa - process an IETF MPA frame
909 * @cm_node: connection's node
910 * @buffer: Data pointer
911 * @type: to return accept or reject
912 * @len: Len of mpa buffer
914 static int i40iw_parse_mpa(struct i40iw_cm_node *cm_node, u8 *buffer, u32 *type, u32 len)
916 struct ietf_mpa_v1 *mpa_frame;
917 struct ietf_mpa_v2 *mpa_v2_frame;
918 struct ietf_rtr_msg *rtr_msg;
922 *type = I40IW_MPA_REQUEST_ACCEPT;
924 if (len < sizeof(struct ietf_mpa_v1)) {
925 i40iw_pr_err("ietf buffer small (%x)\n", len);
929 mpa_frame = (struct ietf_mpa_v1 *)buffer;
930 mpa_hdr_len = sizeof(struct ietf_mpa_v1);
931 priv_data_len = ntohs(mpa_frame->priv_data_len);
933 if (priv_data_len > IETF_MAX_PRIV_DATA_LEN) {
934 i40iw_pr_err("large pri_data %d\n", priv_data_len);
937 if (mpa_frame->rev != IETF_MPA_V1 && mpa_frame->rev != IETF_MPA_V2) {
938 i40iw_pr_err("unsupported mpa rev = %d\n", mpa_frame->rev);
941 if (mpa_frame->rev > cm_node->mpa_frame_rev) {
942 i40iw_pr_err("rev %d\n", mpa_frame->rev);
945 cm_node->mpa_frame_rev = mpa_frame->rev;
947 if (cm_node->state != I40IW_CM_STATE_MPAREQ_SENT) {
948 if (memcmp(mpa_frame->key, IEFT_MPA_KEY_REQ, IETF_MPA_KEY_SIZE)) {
949 i40iw_pr_err("Unexpected MPA Key received\n");
953 if (memcmp(mpa_frame->key, IEFT_MPA_KEY_REP, IETF_MPA_KEY_SIZE)) {
954 i40iw_pr_err("Unexpected MPA Key received\n");
959 if (priv_data_len + mpa_hdr_len > len) {
960 i40iw_pr_err("ietf buffer len(%x + %x != %x)\n",
961 priv_data_len, mpa_hdr_len, len);
964 if (len > MAX_CM_BUFFER) {
965 i40iw_pr_err("ietf buffer large len = %d\n", len);
969 switch (mpa_frame->rev) {
976 mpa_v2_frame = (struct ietf_mpa_v2 *)buffer;
977 mpa_hdr_len += IETF_RTR_MSG_SIZE;
978 rtr_msg = &mpa_v2_frame->rtr_msg;
980 /* parse rtr message */
981 ctrl_ord = ntohs(rtr_msg->ctrl_ord);
982 ctrl_ird = ntohs(rtr_msg->ctrl_ird);
983 ird_size = ctrl_ird & IETF_NO_IRD_ORD;
984 ord_size = ctrl_ord & IETF_NO_IRD_ORD;
986 if (!(ctrl_ird & IETF_PEER_TO_PEER))
989 if (ird_size == IETF_NO_IRD_ORD || ord_size == IETF_NO_IRD_ORD) {
990 cm_node->mpav2_ird_ord = IETF_NO_IRD_ORD;
994 if (cm_node->state != I40IW_CM_STATE_MPAREQ_SENT) {
996 if (!ord_size && (ctrl_ord & IETF_RDMA0_READ))
997 cm_node->ird_size = 1;
998 if (cm_node->ord_size > ird_size)
999 cm_node->ord_size = ird_size;
1002 if (!ird_size && (ctrl_ord & IETF_RDMA0_READ))
1004 if (cm_node->ord_size > ird_size)
1005 cm_node->ord_size = ird_size;
1007 if (cm_node->ird_size < ord_size)
1008 /* no resources available */
1013 if (ctrl_ord & IETF_RDMA0_READ)
1014 cm_node->send_rdma0_op = SEND_RDMA_READ_ZERO;
1015 else if (ctrl_ord & IETF_RDMA0_WRITE)
1016 cm_node->send_rdma0_op = SEND_RDMA_WRITE_ZERO;
1017 else /* Not supported RDMA0 operation */
1019 i40iw_debug(cm_node->dev, I40IW_DEBUG_CM,
1020 "MPAV2: Negotiated ORD: %d, IRD: %d\n",
1021 cm_node->ord_size, cm_node->ird_size);
1030 memcpy(cm_node->pdata_buf, buffer + mpa_hdr_len, priv_data_len);
1031 cm_node->pdata.size = priv_data_len;
1033 if (mpa_frame->flags & IETF_MPA_FLAGS_REJECT)
1034 *type = I40IW_MPA_REQUEST_REJECT;
1036 if (mpa_frame->flags & IETF_MPA_FLAGS_MARKERS)
1037 cm_node->snd_mark_en = true;
1043 * i40iw_schedule_cm_timer
1044 * @@cm_node: connection's node
1045 * @sqbuf: buffer to send
1046 * @type: if it es send ot close
1047 * @send_retrans: if rexmits to be done
1048 * @close_when_complete: is cm_node to be removed
1050 * note - cm_node needs to be protected before calling this. Encase in:
1051 * i40iw_rem_ref_cm_node(cm_core, cm_node);
1052 * i40iw_schedule_cm_timer(...)
1053 * atomic_inc(&cm_node->ref_count);
1055 int i40iw_schedule_cm_timer(struct i40iw_cm_node *cm_node,
1056 struct i40iw_puda_buf *sqbuf,
1057 enum i40iw_timer_type type,
1059 int close_when_complete)
1061 struct i40iw_sc_vsi *vsi = &cm_node->iwdev->vsi;
1062 struct i40iw_cm_core *cm_core = cm_node->cm_core;
1063 struct i40iw_timer_entry *new_send;
1066 unsigned long flags;
1068 new_send = kzalloc(sizeof(*new_send), GFP_ATOMIC);
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_free_sqbuf(vsi, (void *)sqbuf);
1086 i40iw_pr_err("already close entry\n");
1089 cm_node->close_entry = new_send;
1092 if (type == I40IW_TIMER_TYPE_SEND) {
1093 spin_lock_irqsave(&cm_node->retrans_list_lock, flags);
1094 cm_node->send_entry = new_send;
1095 atomic_inc(&cm_node->ref_count);
1096 spin_unlock_irqrestore(&cm_node->retrans_list_lock, flags);
1097 new_send->timetosend = jiffies + I40IW_RETRY_TIMEOUT;
1099 atomic_inc(&sqbuf->refcount);
1100 i40iw_puda_send_buf(vsi->ilq, sqbuf);
1101 if (!send_retrans) {
1102 i40iw_cleanup_retrans_entry(cm_node);
1103 if (close_when_complete)
1104 i40iw_rem_ref_cm_node(cm_node);
1109 spin_lock_irqsave(&cm_core->ht_lock, flags);
1110 was_timer_set = timer_pending(&cm_core->tcp_timer);
1112 if (!was_timer_set) {
1113 cm_core->tcp_timer.expires = new_send->timetosend;
1114 add_timer(&cm_core->tcp_timer);
1116 spin_unlock_irqrestore(&cm_core->ht_lock, flags);
1122 * i40iw_retrans_expired - Could not rexmit the packet
1123 * @cm_node: connection's node
1125 static void i40iw_retrans_expired(struct i40iw_cm_node *cm_node)
1127 struct iw_cm_id *cm_id = cm_node->cm_id;
1128 enum i40iw_cm_node_state state = cm_node->state;
1130 cm_node->state = I40IW_CM_STATE_CLOSED;
1132 case I40IW_CM_STATE_SYN_RCVD:
1133 case I40IW_CM_STATE_CLOSING:
1134 i40iw_rem_ref_cm_node(cm_node);
1136 case I40IW_CM_STATE_FIN_WAIT1:
1137 case I40IW_CM_STATE_LAST_ACK:
1139 cm_id->rem_ref(cm_id);
1140 i40iw_send_reset(cm_node);
1143 atomic_inc(&cm_node->ref_count);
1144 i40iw_send_reset(cm_node);
1145 i40iw_create_event(cm_node, I40IW_CM_EVENT_ABORTED);
1151 * i40iw_handle_close_entry - for handling retry/timeouts
1152 * @cm_node: connection's node
1153 * @rem_node: flag for remove cm_node
1155 static void i40iw_handle_close_entry(struct i40iw_cm_node *cm_node, u32 rem_node)
1157 struct i40iw_timer_entry *close_entry = cm_node->close_entry;
1158 struct iw_cm_id *cm_id = cm_node->cm_id;
1159 struct i40iw_qp *iwqp;
1160 unsigned long flags;
1164 iwqp = (struct i40iw_qp *)close_entry->sqbuf;
1166 spin_lock_irqsave(&iwqp->lock, flags);
1168 iwqp->hw_tcp_state = I40IW_TCP_STATE_CLOSED;
1169 iwqp->hw_iwarp_state = I40IW_QP_STATE_ERROR;
1170 iwqp->last_aeq = I40IW_AE_RESET_SENT;
1171 iwqp->ibqp_state = IB_QPS_ERR;
1172 spin_unlock_irqrestore(&iwqp->lock, flags);
1173 i40iw_cm_disconn(iwqp);
1175 spin_unlock_irqrestore(&iwqp->lock, flags);
1177 } else if (rem_node) {
1178 /* TIME_WAIT state */
1179 i40iw_rem_ref_cm_node(cm_node);
1182 cm_id->rem_ref(cm_id);
1184 cm_node->close_entry = NULL;
1188 * i40iw_cm_timer_tick - system's timer expired callback
1189 * @pass: Pointing to cm_core
1191 static void i40iw_cm_timer_tick(unsigned long pass)
1193 unsigned long nexttimeout = jiffies + I40IW_LONG_TIME;
1194 struct i40iw_cm_node *cm_node;
1195 struct i40iw_timer_entry *send_entry, *close_entry;
1196 struct list_head *list_core_temp;
1197 struct i40iw_sc_vsi *vsi;
1198 struct list_head *list_node;
1199 struct i40iw_cm_core *cm_core = (struct i40iw_cm_core *)pass;
1201 unsigned long timetosend;
1202 struct i40iw_sc_dev *dev;
1203 unsigned long flags;
1205 struct list_head timer_list;
1207 INIT_LIST_HEAD(&timer_list);
1208 spin_lock_irqsave(&cm_core->ht_lock, flags);
1210 list_for_each_safe(list_node, list_core_temp, &cm_core->connected_nodes) {
1211 cm_node = container_of(list_node, struct i40iw_cm_node, list);
1212 if (cm_node->close_entry || cm_node->send_entry) {
1213 atomic_inc(&cm_node->ref_count);
1214 list_add(&cm_node->timer_entry, &timer_list);
1217 spin_unlock_irqrestore(&cm_core->ht_lock, flags);
1219 list_for_each_safe(list_node, list_core_temp, &timer_list) {
1220 cm_node = container_of(list_node,
1221 struct i40iw_cm_node,
1223 close_entry = cm_node->close_entry;
1226 if (time_after(close_entry->timetosend, jiffies)) {
1227 if (nexttimeout > close_entry->timetosend ||
1229 nexttimeout = close_entry->timetosend;
1233 i40iw_handle_close_entry(cm_node, 1);
1237 spin_lock_irqsave(&cm_node->retrans_list_lock, flags);
1239 send_entry = cm_node->send_entry;
1242 if (time_after(send_entry->timetosend, jiffies)) {
1243 if (cm_node->state != I40IW_CM_STATE_OFFLOADED) {
1244 if ((nexttimeout > send_entry->timetosend) ||
1246 nexttimeout = send_entry->timetosend;
1250 i40iw_free_retrans_entry(cm_node);
1255 if ((cm_node->state == I40IW_CM_STATE_OFFLOADED) ||
1256 (cm_node->state == I40IW_CM_STATE_CLOSED)) {
1257 i40iw_free_retrans_entry(cm_node);
1261 if (!send_entry->retranscount || !send_entry->retrycount) {
1262 i40iw_free_retrans_entry(cm_node);
1264 spin_unlock_irqrestore(&cm_node->retrans_list_lock, flags);
1265 i40iw_retrans_expired(cm_node);
1266 cm_node->state = I40IW_CM_STATE_CLOSED;
1267 spin_lock_irqsave(&cm_node->retrans_list_lock, flags);
1270 cm_node->cm_core->stats_pkt_retrans++;
1271 spin_unlock_irqrestore(&cm_node->retrans_list_lock, flags);
1273 vsi = &cm_node->iwdev->vsi;
1275 atomic_inc(&send_entry->sqbuf->refcount);
1276 i40iw_puda_send_buf(vsi->ilq, send_entry->sqbuf);
1277 spin_lock_irqsave(&cm_node->retrans_list_lock, flags);
1278 if (send_entry->send_retrans) {
1279 send_entry->retranscount--;
1280 timetosend = (I40IW_RETRY_TIMEOUT <<
1281 (I40IW_DEFAULT_RETRANS -
1282 send_entry->retranscount));
1284 send_entry->timetosend = jiffies +
1285 min(timetosend, I40IW_MAX_TIMEOUT);
1286 if (nexttimeout > send_entry->timetosend || !settimer) {
1287 nexttimeout = send_entry->timetosend;
1291 int close_when_complete;
1293 close_when_complete = send_entry->close_when_complete;
1294 i40iw_debug(cm_node->dev,
1296 "cm_node=%p state=%d\n",
1299 i40iw_free_retrans_entry(cm_node);
1300 if (close_when_complete)
1301 i40iw_rem_ref_cm_node(cm_node);
1304 spin_unlock_irqrestore(&cm_node->retrans_list_lock, flags);
1305 i40iw_rem_ref_cm_node(cm_node);
1309 spin_lock_irqsave(&cm_core->ht_lock, flags);
1310 if (!timer_pending(&cm_core->tcp_timer)) {
1311 cm_core->tcp_timer.expires = nexttimeout;
1312 add_timer(&cm_core->tcp_timer);
1314 spin_unlock_irqrestore(&cm_core->ht_lock, flags);
1319 * i40iw_send_syn - send SYN packet
1320 * @cm_node: connection's node
1321 * @sendack: flag to set ACK bit or not
1323 int i40iw_send_syn(struct i40iw_cm_node *cm_node, u32 sendack)
1325 struct i40iw_puda_buf *sqbuf;
1326 int flags = SET_SYN;
1327 char optionsbuffer[sizeof(struct option_mss) +
1328 sizeof(struct option_windowscale) +
1329 sizeof(struct option_base) + TCP_OPTIONS_PADDING];
1330 struct i40iw_kmem_info opts;
1332 int optionssize = 0;
1333 /* Sending MSS option */
1334 union all_known_options *options;
1336 opts.addr = optionsbuffer;
1338 i40iw_pr_err("no cm_node\n");
1342 options = (union all_known_options *)&optionsbuffer[optionssize];
1343 options->as_mss.optionnum = OPTION_NUMBER_MSS;
1344 options->as_mss.length = sizeof(struct option_mss);
1345 options->as_mss.mss = htons(cm_node->tcp_cntxt.mss);
1346 optionssize += sizeof(struct option_mss);
1348 options = (union all_known_options *)&optionsbuffer[optionssize];
1349 options->as_windowscale.optionnum = OPTION_NUMBER_WINDOW_SCALE;
1350 options->as_windowscale.length = sizeof(struct option_windowscale);
1351 options->as_windowscale.shiftcount = cm_node->tcp_cntxt.rcv_wscale;
1352 optionssize += sizeof(struct option_windowscale);
1353 options = (union all_known_options *)&optionsbuffer[optionssize];
1354 options->as_end = OPTION_NUMBER_END;
1360 opts.size = optionssize;
1362 sqbuf = i40iw_form_cm_frame(cm_node, &opts, NULL, NULL, flags);
1364 i40iw_pr_err("no sqbuf\n");
1367 return i40iw_schedule_cm_timer(cm_node, sqbuf, I40IW_TIMER_TYPE_SEND, 1, 0);
1371 * i40iw_send_ack - Send ACK packet
1372 * @cm_node: connection's node
1374 static void i40iw_send_ack(struct i40iw_cm_node *cm_node)
1376 struct i40iw_puda_buf *sqbuf;
1377 struct i40iw_sc_vsi *vsi = &cm_node->iwdev->vsi;
1379 sqbuf = i40iw_form_cm_frame(cm_node, NULL, NULL, NULL, SET_ACK);
1381 i40iw_puda_send_buf(vsi->ilq, sqbuf);
1383 i40iw_pr_err("no sqbuf\n");
1387 * i40iw_send_fin - Send FIN pkt
1388 * @cm_node: connection's node
1390 static int i40iw_send_fin(struct i40iw_cm_node *cm_node)
1392 struct i40iw_puda_buf *sqbuf;
1394 sqbuf = i40iw_form_cm_frame(cm_node, NULL, NULL, NULL, SET_ACK | SET_FIN);
1396 i40iw_pr_err("no sqbuf\n");
1399 return i40iw_schedule_cm_timer(cm_node, sqbuf, I40IW_TIMER_TYPE_SEND, 1, 0);
1403 * i40iw_find_node - find a cm node that matches the reference cm node
1404 * @cm_core: cm's core
1405 * @rem_port: remote tcp port num
1406 * @rem_addr: remote ip addr
1407 * @loc_port: local tcp port num
1408 * @loc_addr: loc ip addr
1409 * @add_refcnt: flag to increment refcount of cm_node
1411 struct i40iw_cm_node *i40iw_find_node(struct i40iw_cm_core *cm_core,
1418 struct list_head *hte;
1419 struct i40iw_cm_node *cm_node;
1420 unsigned long flags;
1422 hte = &cm_core->connected_nodes;
1424 /* walk list and find cm_node associated with this session ID */
1425 spin_lock_irqsave(&cm_core->ht_lock, flags);
1426 list_for_each_entry(cm_node, hte, list) {
1427 if (!memcmp(cm_node->loc_addr, loc_addr, sizeof(cm_node->loc_addr)) &&
1428 (cm_node->loc_port == loc_port) &&
1429 !memcmp(cm_node->rem_addr, rem_addr, sizeof(cm_node->rem_addr)) &&
1430 (cm_node->rem_port == rem_port)) {
1432 atomic_inc(&cm_node->ref_count);
1433 spin_unlock_irqrestore(&cm_core->ht_lock, flags);
1437 spin_unlock_irqrestore(&cm_core->ht_lock, flags);
1444 * i40iw_find_listener - find a cm node listening on this addr-port pair
1445 * @cm_core: cm's core
1446 * @dst_port: listener tcp port num
1447 * @dst_addr: listener ip addr
1448 * @listener_state: state to match with listen node's
1450 static struct i40iw_cm_listener *i40iw_find_listener(
1451 struct i40iw_cm_core *cm_core,
1455 enum i40iw_cm_listener_state
1458 struct i40iw_cm_listener *listen_node;
1459 static const u32 ip_zero[4] = { 0, 0, 0, 0 };
1462 unsigned long flags;
1464 /* walk list and find cm_node associated with this session ID */
1465 spin_lock_irqsave(&cm_core->listen_list_lock, flags);
1466 list_for_each_entry(listen_node, &cm_core->listen_nodes, list) {
1467 memcpy(listen_addr, listen_node->loc_addr, sizeof(listen_addr));
1468 listen_port = listen_node->loc_port;
1469 /* compare node pair, return node handle if a match */
1470 if ((!memcmp(listen_addr, dst_addr, sizeof(listen_addr)) ||
1471 !memcmp(listen_addr, ip_zero, sizeof(listen_addr))) &&
1472 (listen_port == dst_port) &&
1473 (listener_state & listen_node->listener_state)) {
1474 atomic_inc(&listen_node->ref_count);
1475 spin_unlock_irqrestore(&cm_core->listen_list_lock, flags);
1479 spin_unlock_irqrestore(&cm_core->listen_list_lock, flags);
1484 * i40iw_add_hte_node - add a cm node to the hash table
1485 * @cm_core: cm's core
1486 * @cm_node: connection's node
1488 static void i40iw_add_hte_node(struct i40iw_cm_core *cm_core,
1489 struct i40iw_cm_node *cm_node)
1491 struct list_head *hte;
1492 unsigned long flags;
1494 if (!cm_node || !cm_core) {
1495 i40iw_pr_err("cm_node or cm_core == NULL\n");
1498 spin_lock_irqsave(&cm_core->ht_lock, flags);
1500 /* get a handle on the hash table element (list head for this slot) */
1501 hte = &cm_core->connected_nodes;
1502 list_add_tail(&cm_node->list, hte);
1503 spin_unlock_irqrestore(&cm_core->ht_lock, flags);
1507 * i40iw_port_in_use - determine if port is in use
1508 * @port: port number
1509 * @active_side: flag for listener side vs active side
1511 static bool i40iw_port_in_use(struct i40iw_cm_core *cm_core, u16 port, bool active_side)
1513 struct i40iw_cm_listener *listen_node;
1514 struct i40iw_cm_node *cm_node;
1515 unsigned long flags;
1519 /* search connected node list */
1520 spin_lock_irqsave(&cm_core->ht_lock, flags);
1521 list_for_each_entry(cm_node, &cm_core->connected_nodes, list) {
1522 if (cm_node->loc_port == port) {
1528 clear_bit(port, cm_core->active_side_ports);
1529 spin_unlock_irqrestore(&cm_core->ht_lock, flags);
1531 spin_lock_irqsave(&cm_core->listen_list_lock, flags);
1532 list_for_each_entry(listen_node, &cm_core->listen_nodes, list) {
1533 if (listen_node->loc_port == port) {
1538 spin_unlock_irqrestore(&cm_core->listen_list_lock, flags);
1545 * i40iw_del_multiple_qhash - Remove qhash and child listens
1546 * @iwdev: iWarp device
1547 * @cm_info: CM info for parent listen node
1548 * @cm_parent_listen_node: The parent listen node
1550 static enum i40iw_status_code i40iw_del_multiple_qhash(
1551 struct i40iw_device *iwdev,
1552 struct i40iw_cm_info *cm_info,
1553 struct i40iw_cm_listener *cm_parent_listen_node)
1555 struct i40iw_cm_listener *child_listen_node;
1556 enum i40iw_status_code ret = I40IW_ERR_CONFIG;
1557 struct list_head *pos, *tpos;
1558 unsigned long flags;
1560 spin_lock_irqsave(&iwdev->cm_core.listen_list_lock, flags);
1561 list_for_each_safe(pos, tpos, &cm_parent_listen_node->child_listen_list) {
1562 child_listen_node = list_entry(pos, struct i40iw_cm_listener, child_listen_list);
1563 if (child_listen_node->ipv4)
1564 i40iw_debug(&iwdev->sc_dev,
1566 "removing child listen for IP=%pI4, port=%d, vlan=%d\n",
1567 child_listen_node->loc_addr,
1568 child_listen_node->loc_port,
1569 child_listen_node->vlan_id);
1571 i40iw_debug(&iwdev->sc_dev, I40IW_DEBUG_CM,
1572 "removing child listen for IP=%pI6, port=%d, vlan=%d\n",
1573 child_listen_node->loc_addr,
1574 child_listen_node->loc_port,
1575 child_listen_node->vlan_id);
1577 memcpy(cm_info->loc_addr, child_listen_node->loc_addr,
1578 sizeof(cm_info->loc_addr));
1579 cm_info->vlan_id = child_listen_node->vlan_id;
1580 if (child_listen_node->qhash_set) {
1581 ret = i40iw_manage_qhash(iwdev, cm_info,
1582 I40IW_QHASH_TYPE_TCP_SYN,
1583 I40IW_QHASH_MANAGE_TYPE_DELETE,
1585 child_listen_node->qhash_set = false;
1587 ret = I40IW_SUCCESS;
1589 i40iw_debug(&iwdev->sc_dev,
1591 "freed pointer = %p\n",
1593 kfree(child_listen_node);
1594 cm_parent_listen_node->cm_core->stats_listen_nodes_destroyed++;
1596 spin_unlock_irqrestore(&iwdev->cm_core.listen_list_lock, flags);
1602 * i40iw_netdev_vlan_ipv6 - Gets the netdev and vlan
1603 * @addr: local IPv6 address
1604 * @vlan_id: vlan id for the given IPv6 address
1606 * Returns the net_device of the IPv6 address and also sets the
1607 * vlan id for that address.
1609 static struct net_device *i40iw_netdev_vlan_ipv6(u32 *addr, u16 *vlan_id)
1611 struct net_device *ip_dev = NULL;
1612 struct in6_addr laddr6;
1614 if (!IS_ENABLED(CONFIG_IPV6))
1616 i40iw_copy_ip_htonl(laddr6.in6_u.u6_addr32, addr);
1618 *vlan_id = I40IW_NO_VLAN;
1620 for_each_netdev_rcu(&init_net, ip_dev) {
1621 if (ipv6_chk_addr(&init_net, &laddr6, ip_dev, 1)) {
1623 *vlan_id = rdma_vlan_dev_vlan_id(ip_dev);
1632 * i40iw_get_vlan_ipv4 - Returns the vlan_id for IPv4 address
1633 * @addr: local IPv4 address
1635 static u16 i40iw_get_vlan_ipv4(u32 *addr)
1637 struct net_device *netdev;
1638 u16 vlan_id = I40IW_NO_VLAN;
1640 netdev = ip_dev_find(&init_net, htonl(addr[0]));
1642 vlan_id = rdma_vlan_dev_vlan_id(netdev);
1649 * i40iw_add_mqh_6 - Adds multiple qhashes for IPv6
1650 * @iwdev: iWarp device
1651 * @cm_info: CM info for parent listen node
1652 * @cm_parent_listen_node: The parent listen node
1654 * Adds a qhash and a child listen node for every IPv6 address
1655 * on the adapter and adds the associated qhash filter
1657 static enum i40iw_status_code i40iw_add_mqh_6(struct i40iw_device *iwdev,
1658 struct i40iw_cm_info *cm_info,
1659 struct i40iw_cm_listener *cm_parent_listen_node)
1661 struct net_device *ip_dev;
1662 struct inet6_dev *idev;
1663 struct inet6_ifaddr *ifp, *tmp;
1664 enum i40iw_status_code ret = 0;
1665 struct i40iw_cm_listener *child_listen_node;
1666 unsigned long flags;
1669 for_each_netdev_rcu(&init_net, ip_dev) {
1670 if ((((rdma_vlan_dev_vlan_id(ip_dev) < I40IW_NO_VLAN) &&
1671 (rdma_vlan_dev_real_dev(ip_dev) == iwdev->netdev)) ||
1672 (ip_dev == iwdev->netdev)) && (ip_dev->flags & IFF_UP)) {
1673 idev = __in6_dev_get(ip_dev);
1675 i40iw_pr_err("idev == NULL\n");
1678 list_for_each_entry_safe(ifp, tmp, &idev->addr_list, if_list) {
1679 i40iw_debug(&iwdev->sc_dev,
1681 "IP=%pI6, vlan_id=%d, MAC=%pM\n",
1683 rdma_vlan_dev_vlan_id(ip_dev),
1686 kzalloc(sizeof(*child_listen_node), GFP_ATOMIC);
1687 i40iw_debug(&iwdev->sc_dev,
1689 "Allocating child listener %p\n",
1691 if (!child_listen_node) {
1692 ret = I40IW_ERR_NO_MEMORY;
1695 cm_info->vlan_id = rdma_vlan_dev_vlan_id(ip_dev);
1696 cm_parent_listen_node->vlan_id = cm_info->vlan_id;
1698 memcpy(child_listen_node, cm_parent_listen_node,
1699 sizeof(*child_listen_node));
1701 i40iw_copy_ip_ntohl(child_listen_node->loc_addr,
1702 ifp->addr.in6_u.u6_addr32);
1703 memcpy(cm_info->loc_addr, child_listen_node->loc_addr,
1704 sizeof(cm_info->loc_addr));
1706 ret = i40iw_manage_qhash(iwdev, cm_info,
1707 I40IW_QHASH_TYPE_TCP_SYN,
1708 I40IW_QHASH_MANAGE_TYPE_ADD,
1711 child_listen_node->qhash_set = true;
1712 spin_lock_irqsave(&iwdev->cm_core.listen_list_lock, flags);
1713 list_add(&child_listen_node->child_listen_list,
1714 &cm_parent_listen_node->child_listen_list);
1715 spin_unlock_irqrestore(&iwdev->cm_core.listen_list_lock, flags);
1716 cm_parent_listen_node->cm_core->stats_listen_nodes_created++;
1718 kfree(child_listen_node);
1729 * i40iw_add_mqh_4 - Adds multiple qhashes for IPv4
1730 * @iwdev: iWarp device
1731 * @cm_info: CM info for parent listen node
1732 * @cm_parent_listen_node: The parent listen node
1734 * Adds a qhash and a child listen node for every IPv4 address
1735 * on the adapter and adds the associated qhash filter
1737 static enum i40iw_status_code i40iw_add_mqh_4(
1738 struct i40iw_device *iwdev,
1739 struct i40iw_cm_info *cm_info,
1740 struct i40iw_cm_listener *cm_parent_listen_node)
1742 struct net_device *dev;
1743 struct in_device *idev;
1744 struct i40iw_cm_listener *child_listen_node;
1745 enum i40iw_status_code ret = 0;
1746 unsigned long flags;
1749 for_each_netdev(&init_net, dev) {
1750 if ((((rdma_vlan_dev_vlan_id(dev) < I40IW_NO_VLAN) &&
1751 (rdma_vlan_dev_real_dev(dev) == iwdev->netdev)) ||
1752 (dev == iwdev->netdev)) && (dev->flags & IFF_UP)) {
1753 idev = in_dev_get(dev);
1755 i40iw_debug(&iwdev->sc_dev,
1757 "Allocating child CM Listener forIP=%pI4, vlan_id=%d, MAC=%pM\n",
1759 rdma_vlan_dev_vlan_id(dev),
1761 child_listen_node = kzalloc(sizeof(*child_listen_node), GFP_ATOMIC);
1762 cm_parent_listen_node->cm_core->stats_listen_nodes_created++;
1763 i40iw_debug(&iwdev->sc_dev,
1765 "Allocating child listener %p\n",
1767 if (!child_listen_node) {
1769 ret = I40IW_ERR_NO_MEMORY;
1772 cm_info->vlan_id = rdma_vlan_dev_vlan_id(dev);
1773 cm_parent_listen_node->vlan_id = cm_info->vlan_id;
1774 memcpy(child_listen_node,
1775 cm_parent_listen_node,
1776 sizeof(*child_listen_node));
1778 child_listen_node->loc_addr[0] = ntohl(ifa->ifa_address);
1779 memcpy(cm_info->loc_addr, child_listen_node->loc_addr,
1780 sizeof(cm_info->loc_addr));
1782 ret = i40iw_manage_qhash(iwdev,
1784 I40IW_QHASH_TYPE_TCP_SYN,
1785 I40IW_QHASH_MANAGE_TYPE_ADD,
1789 child_listen_node->qhash_set = true;
1790 spin_lock_irqsave(&iwdev->cm_core.listen_list_lock, flags);
1791 list_add(&child_listen_node->child_listen_list,
1792 &cm_parent_listen_node->child_listen_list);
1793 spin_unlock_irqrestore(&iwdev->cm_core.listen_list_lock, flags);
1795 kfree(child_listen_node);
1796 cm_parent_listen_node->cm_core->stats_listen_nodes_created--;
1809 * i40iw_dec_refcnt_listen - delete listener and associated cm nodes
1810 * @cm_core: cm's core
1811 * @free_hanging_nodes: to free associated cm_nodes
1812 * @apbvt_del: flag to delete the apbvt
1814 static int i40iw_dec_refcnt_listen(struct i40iw_cm_core *cm_core,
1815 struct i40iw_cm_listener *listener,
1816 int free_hanging_nodes, bool apbvt_del)
1820 struct list_head *list_pos;
1821 struct list_head *list_temp;
1822 struct i40iw_cm_node *cm_node;
1823 struct list_head reset_list;
1824 struct i40iw_cm_info nfo;
1825 struct i40iw_cm_node *loopback;
1826 enum i40iw_cm_node_state old_state;
1827 unsigned long flags;
1829 /* free non-accelerated child nodes for this listener */
1830 INIT_LIST_HEAD(&reset_list);
1831 if (free_hanging_nodes) {
1832 spin_lock_irqsave(&cm_core->ht_lock, flags);
1833 list_for_each_safe(list_pos, list_temp, &cm_core->connected_nodes) {
1834 cm_node = container_of(list_pos, struct i40iw_cm_node, list);
1835 if ((cm_node->listener == listener) && !cm_node->accelerated) {
1836 atomic_inc(&cm_node->ref_count);
1837 list_add(&cm_node->reset_entry, &reset_list);
1840 spin_unlock_irqrestore(&cm_core->ht_lock, flags);
1843 list_for_each_safe(list_pos, list_temp, &reset_list) {
1844 cm_node = container_of(list_pos, struct i40iw_cm_node, reset_entry);
1845 loopback = cm_node->loopbackpartner;
1846 if (cm_node->state >= I40IW_CM_STATE_FIN_WAIT1) {
1847 i40iw_rem_ref_cm_node(cm_node);
1850 i40iw_cleanup_retrans_entry(cm_node);
1851 err = i40iw_send_reset(cm_node);
1853 cm_node->state = I40IW_CM_STATE_CLOSED;
1854 i40iw_pr_err("send reset\n");
1856 old_state = cm_node->state;
1857 cm_node->state = I40IW_CM_STATE_LISTENER_DESTROYED;
1858 if (old_state != I40IW_CM_STATE_MPAREQ_RCVD)
1859 i40iw_rem_ref_cm_node(cm_node);
1862 struct i40iw_cm_event event;
1864 event.cm_node = loopback;
1865 memcpy(event.cm_info.rem_addr,
1866 loopback->rem_addr, sizeof(event.cm_info.rem_addr));
1867 memcpy(event.cm_info.loc_addr,
1868 loopback->loc_addr, sizeof(event.cm_info.loc_addr));
1869 event.cm_info.rem_port = loopback->rem_port;
1870 event.cm_info.loc_port = loopback->loc_port;
1871 event.cm_info.cm_id = loopback->cm_id;
1872 event.cm_info.ipv4 = loopback->ipv4;
1873 atomic_inc(&loopback->ref_count);
1874 loopback->state = I40IW_CM_STATE_CLOSED;
1875 i40iw_event_connect_error(&event);
1876 cm_node->state = I40IW_CM_STATE_LISTENER_DESTROYED;
1877 i40iw_rem_ref_cm_node(cm_node);
1882 if (!atomic_dec_return(&listener->ref_count)) {
1883 spin_lock_irqsave(&cm_core->listen_list_lock, flags);
1884 list_del(&listener->list);
1885 spin_unlock_irqrestore(&cm_core->listen_list_lock, flags);
1887 if (listener->iwdev) {
1888 if (apbvt_del && !i40iw_port_in_use(cm_core, listener->loc_port, false))
1889 i40iw_manage_apbvt(listener->iwdev,
1891 I40IW_MANAGE_APBVT_DEL);
1893 memcpy(nfo.loc_addr, listener->loc_addr, sizeof(nfo.loc_addr));
1894 nfo.loc_port = listener->loc_port;
1895 nfo.ipv4 = listener->ipv4;
1896 nfo.vlan_id = listener->vlan_id;
1897 nfo.user_pri = listener->user_pri;
1899 if (!list_empty(&listener->child_listen_list)) {
1900 i40iw_del_multiple_qhash(listener->iwdev, &nfo, listener);
1902 if (listener->qhash_set)
1903 i40iw_manage_qhash(listener->iwdev,
1905 I40IW_QHASH_TYPE_TCP_SYN,
1906 I40IW_QHASH_MANAGE_TYPE_DELETE,
1912 cm_core->stats_listen_destroyed++;
1914 cm_core->stats_listen_nodes_destroyed++;
1920 if (atomic_read(&listener->pend_accepts_cnt) > 0)
1921 i40iw_debug(cm_core->dev,
1923 "%s: listener (%p) pending accepts=%u\n",
1926 atomic_read(&listener->pend_accepts_cnt));
1933 * i40iw_cm_del_listen - delete a linstener
1934 * @cm_core: cm's core
1935 * @listener: passive connection's listener
1936 * @apbvt_del: flag to delete apbvt
1938 static int i40iw_cm_del_listen(struct i40iw_cm_core *cm_core,
1939 struct i40iw_cm_listener *listener,
1942 listener->listener_state = I40IW_CM_LISTENER_PASSIVE_STATE;
1943 listener->cm_id = NULL; /* going to be destroyed pretty soon */
1944 return i40iw_dec_refcnt_listen(cm_core, listener, 1, apbvt_del);
1948 * i40iw_addr_resolve_neigh - resolve neighbor address
1949 * @iwdev: iwarp device structure
1950 * @src_ip: local ip address
1951 * @dst_ip: remote ip address
1952 * @arpindex: if there is an arp entry
1954 static int i40iw_addr_resolve_neigh(struct i40iw_device *iwdev,
1960 struct neighbour *neigh;
1962 struct net_device *netdev = iwdev->netdev;
1963 __be32 dst_ipaddr = htonl(dst_ip);
1964 __be32 src_ipaddr = htonl(src_ip);
1966 rt = ip_route_output(&init_net, dst_ipaddr, src_ipaddr, 0, 0);
1968 i40iw_pr_err("ip_route_output\n");
1972 if (netif_is_bond_slave(netdev))
1973 netdev = netdev_master_upper_dev_get(netdev);
1975 neigh = dst_neigh_lookup(&rt->dst, &dst_ipaddr);
1979 if (neigh->nud_state & NUD_VALID) {
1980 if (arpindex >= 0) {
1981 if (ether_addr_equal(iwdev->arp_table[arpindex].mac_addr,
1983 /* Mac address same as arp table */
1984 goto resolve_neigh_exit;
1985 i40iw_manage_arp_cache(iwdev,
1986 iwdev->arp_table[arpindex].mac_addr,
1992 i40iw_manage_arp_cache(iwdev, neigh->ha, &dst_ip, true, I40IW_ARP_ADD);
1993 rc = i40iw_arp_table(iwdev, &dst_ip, true, NULL, I40IW_ARP_RESOLVE);
1995 neigh_event_send(neigh, NULL);
2002 neigh_release(neigh);
2009 * i40iw_get_dst_ipv6
2011 static struct dst_entry *i40iw_get_dst_ipv6(struct sockaddr_in6 *src_addr,
2012 struct sockaddr_in6 *dst_addr)
2014 struct dst_entry *dst;
2017 memset(&fl6, 0, sizeof(fl6));
2018 fl6.daddr = dst_addr->sin6_addr;
2019 fl6.saddr = src_addr->sin6_addr;
2020 if (ipv6_addr_type(&fl6.daddr) & IPV6_ADDR_LINKLOCAL)
2021 fl6.flowi6_oif = dst_addr->sin6_scope_id;
2023 dst = ip6_route_output(&init_net, NULL, &fl6);
2028 * i40iw_addr_resolve_neigh_ipv6 - resolve neighbor ipv6 address
2029 * @iwdev: iwarp device structure
2030 * @dst_ip: remote ip address
2031 * @arpindex: if there is an arp entry
2033 static int i40iw_addr_resolve_neigh_ipv6(struct i40iw_device *iwdev,
2038 struct neighbour *neigh;
2040 struct net_device *netdev = iwdev->netdev;
2041 struct dst_entry *dst;
2042 struct sockaddr_in6 dst_addr;
2043 struct sockaddr_in6 src_addr;
2045 memset(&dst_addr, 0, sizeof(dst_addr));
2046 dst_addr.sin6_family = AF_INET6;
2047 i40iw_copy_ip_htonl(dst_addr.sin6_addr.in6_u.u6_addr32, dest);
2048 memset(&src_addr, 0, sizeof(src_addr));
2049 src_addr.sin6_family = AF_INET6;
2050 i40iw_copy_ip_htonl(src_addr.sin6_addr.in6_u.u6_addr32, src);
2051 dst = i40iw_get_dst_ipv6(&src_addr, &dst_addr);
2052 if (!dst || dst->error) {
2055 i40iw_pr_err("ip6_route_output returned dst->error = %d\n",
2061 if (netif_is_bond_slave(netdev))
2062 netdev = netdev_master_upper_dev_get(netdev);
2064 neigh = dst_neigh_lookup(dst, &dst_addr);
2068 i40iw_debug(&iwdev->sc_dev, I40IW_DEBUG_CM, "dst_neigh_lookup MAC=%pM\n", neigh->ha);
2069 if (neigh->nud_state & NUD_VALID) {
2070 if (arpindex >= 0) {
2071 if (ether_addr_equal
2072 (iwdev->arp_table[arpindex].mac_addr,
2074 /* Mac address same as in arp table */
2075 goto resolve_neigh_exit6;
2077 i40iw_manage_arp_cache(iwdev,
2078 iwdev->arp_table[arpindex].mac_addr,
2083 i40iw_manage_arp_cache(iwdev,
2088 rc = i40iw_arp_table(iwdev,
2094 neigh_event_send(neigh, NULL);
2098 resolve_neigh_exit6:
2101 neigh_release(neigh);
2107 * i40iw_ipv4_is_loopback - check if loopback
2108 * @loc_addr: local addr to compare
2109 * @rem_addr: remote address
2111 static bool i40iw_ipv4_is_loopback(u32 loc_addr, u32 rem_addr)
2113 return ipv4_is_loopback(htonl(rem_addr)) || (loc_addr == rem_addr);
2117 * i40iw_ipv6_is_loopback - check if loopback
2118 * @loc_addr: local addr to compare
2119 * @rem_addr: remote address
2121 static bool i40iw_ipv6_is_loopback(u32 *loc_addr, u32 *rem_addr)
2123 struct in6_addr raddr6;
2125 i40iw_copy_ip_htonl(raddr6.in6_u.u6_addr32, rem_addr);
2126 return !memcmp(loc_addr, rem_addr, 16) || ipv6_addr_loopback(&raddr6);
2130 * i40iw_make_cm_node - create a new instance of a cm node
2131 * @cm_core: cm's core
2132 * @iwdev: iwarp device structure
2133 * @cm_info: quad info for connection
2134 * @listener: passive connection's listener
2136 static struct i40iw_cm_node *i40iw_make_cm_node(
2137 struct i40iw_cm_core *cm_core,
2138 struct i40iw_device *iwdev,
2139 struct i40iw_cm_info *cm_info,
2140 struct i40iw_cm_listener *listener)
2142 struct i40iw_cm_node *cm_node;
2146 struct net_device *netdev = iwdev->netdev;
2148 /* create an hte and cm_node for this instance */
2149 cm_node = kzalloc(sizeof(*cm_node), GFP_ATOMIC);
2153 /* set our node specific transport info */
2154 cm_node->ipv4 = cm_info->ipv4;
2155 cm_node->vlan_id = cm_info->vlan_id;
2156 if ((cm_node->vlan_id == I40IW_NO_VLAN) && iwdev->dcb)
2157 cm_node->vlan_id = 0;
2158 cm_node->tos = cm_info->tos;
2159 cm_node->user_pri = cm_info->user_pri;
2161 if (listener->tos != cm_info->tos)
2162 i40iw_debug(&iwdev->sc_dev, I40IW_DEBUG_DCB,
2163 "application TOS[%d] and remote client TOS[%d] mismatch\n",
2164 listener->tos, cm_info->tos);
2165 cm_node->tos = max(listener->tos, cm_info->tos);
2166 cm_node->user_pri = rt_tos2priority(cm_node->tos);
2167 i40iw_debug(&iwdev->sc_dev, I40IW_DEBUG_DCB, "listener: TOS:[%d] UP:[%d]\n",
2168 cm_node->tos, cm_node->user_pri);
2170 memcpy(cm_node->loc_addr, cm_info->loc_addr, sizeof(cm_node->loc_addr));
2171 memcpy(cm_node->rem_addr, cm_info->rem_addr, sizeof(cm_node->rem_addr));
2172 cm_node->loc_port = cm_info->loc_port;
2173 cm_node->rem_port = cm_info->rem_port;
2175 cm_node->mpa_frame_rev = iwdev->mpa_version;
2176 cm_node->send_rdma0_op = SEND_RDMA_READ_ZERO;
2177 cm_node->ird_size = I40IW_MAX_IRD_SIZE;
2178 cm_node->ord_size = I40IW_MAX_ORD_SIZE;
2180 cm_node->listener = listener;
2181 cm_node->cm_id = cm_info->cm_id;
2182 ether_addr_copy(cm_node->loc_mac, netdev->dev_addr);
2183 spin_lock_init(&cm_node->retrans_list_lock);
2185 atomic_set(&cm_node->ref_count, 1);
2186 /* associate our parent CM core */
2187 cm_node->cm_core = cm_core;
2188 cm_node->tcp_cntxt.loc_id = I40IW_CM_DEF_LOCAL_ID;
2189 cm_node->tcp_cntxt.rcv_wscale = I40IW_CM_DEFAULT_RCV_WND_SCALE;
2190 cm_node->tcp_cntxt.rcv_wnd =
2191 I40IW_CM_DEFAULT_RCV_WND_SCALED >> I40IW_CM_DEFAULT_RCV_WND_SCALE;
2192 ts = current_kernel_time();
2193 cm_node->tcp_cntxt.loc_seq_num = ts.tv_nsec;
2194 cm_node->tcp_cntxt.mss = iwdev->vsi.mss;
2196 cm_node->iwdev = iwdev;
2197 cm_node->dev = &iwdev->sc_dev;
2199 if ((cm_node->ipv4 &&
2200 i40iw_ipv4_is_loopback(cm_node->loc_addr[0], cm_node->rem_addr[0])) ||
2201 (!cm_node->ipv4 && i40iw_ipv6_is_loopback(cm_node->loc_addr,
2202 cm_node->rem_addr))) {
2203 arpindex = i40iw_arp_table(iwdev,
2209 oldarpindex = i40iw_arp_table(iwdev,
2215 arpindex = i40iw_addr_resolve_neigh(iwdev,
2216 cm_info->loc_addr[0],
2217 cm_info->rem_addr[0],
2219 else if (IS_ENABLED(CONFIG_IPV6))
2220 arpindex = i40iw_addr_resolve_neigh_ipv6(iwdev,
2228 i40iw_pr_err("cm_node arpindex\n");
2232 ether_addr_copy(cm_node->rem_mac, iwdev->arp_table[arpindex].mac_addr);
2233 i40iw_add_hte_node(cm_core, cm_node);
2234 cm_core->stats_nodes_created++;
2239 * i40iw_rem_ref_cm_node - destroy an instance of a cm node
2240 * @cm_node: connection's node
2242 static void i40iw_rem_ref_cm_node(struct i40iw_cm_node *cm_node)
2244 struct i40iw_cm_core *cm_core = cm_node->cm_core;
2245 struct i40iw_qp *iwqp;
2246 struct i40iw_cm_info nfo;
2247 unsigned long flags;
2249 spin_lock_irqsave(&cm_node->cm_core->ht_lock, flags);
2250 if (atomic_dec_return(&cm_node->ref_count)) {
2251 spin_unlock_irqrestore(&cm_node->cm_core->ht_lock, flags);
2254 list_del(&cm_node->list);
2255 spin_unlock_irqrestore(&cm_node->cm_core->ht_lock, flags);
2257 /* if the node is destroyed before connection was accelerated */
2258 if (!cm_node->accelerated && cm_node->accept_pend) {
2259 pr_err("node destroyed before established\n");
2260 atomic_dec(&cm_node->listener->pend_accepts_cnt);
2262 if (cm_node->close_entry)
2263 i40iw_handle_close_entry(cm_node, 0);
2264 if (cm_node->listener) {
2265 i40iw_dec_refcnt_listen(cm_core, cm_node->listener, 0, true);
2267 if (!i40iw_port_in_use(cm_core, cm_node->loc_port, true) && cm_node->apbvt_set) {
2268 i40iw_manage_apbvt(cm_node->iwdev,
2270 I40IW_MANAGE_APBVT_DEL);
2271 cm_node->apbvt_set = 0;
2273 i40iw_get_addr_info(cm_node, &nfo);
2274 if (cm_node->qhash_set) {
2275 i40iw_manage_qhash(cm_node->iwdev,
2277 I40IW_QHASH_TYPE_TCP_ESTABLISHED,
2278 I40IW_QHASH_MANAGE_TYPE_DELETE,
2281 cm_node->qhash_set = 0;
2285 iwqp = cm_node->iwqp;
2287 iwqp->cm_node = NULL;
2288 i40iw_rem_ref(&iwqp->ibqp);
2289 cm_node->iwqp = NULL;
2290 } else if (cm_node->qhash_set) {
2291 i40iw_get_addr_info(cm_node, &nfo);
2292 i40iw_manage_qhash(cm_node->iwdev,
2294 I40IW_QHASH_TYPE_TCP_ESTABLISHED,
2295 I40IW_QHASH_MANAGE_TYPE_DELETE,
2298 cm_node->qhash_set = 0;
2301 cm_node->cm_core->stats_nodes_destroyed++;
2306 * i40iw_handle_fin_pkt - FIN packet received
2307 * @cm_node: connection's node
2309 static void i40iw_handle_fin_pkt(struct i40iw_cm_node *cm_node)
2313 switch (cm_node->state) {
2314 case I40IW_CM_STATE_SYN_RCVD:
2315 case I40IW_CM_STATE_SYN_SENT:
2316 case I40IW_CM_STATE_ESTABLISHED:
2317 case I40IW_CM_STATE_MPAREJ_RCVD:
2318 cm_node->tcp_cntxt.rcv_nxt++;
2319 i40iw_cleanup_retrans_entry(cm_node);
2320 cm_node->state = I40IW_CM_STATE_LAST_ACK;
2321 i40iw_send_fin(cm_node);
2323 case I40IW_CM_STATE_MPAREQ_SENT:
2324 i40iw_create_event(cm_node, I40IW_CM_EVENT_ABORTED);
2325 cm_node->tcp_cntxt.rcv_nxt++;
2326 i40iw_cleanup_retrans_entry(cm_node);
2327 cm_node->state = I40IW_CM_STATE_CLOSED;
2328 atomic_inc(&cm_node->ref_count);
2329 i40iw_send_reset(cm_node);
2331 case I40IW_CM_STATE_FIN_WAIT1:
2332 cm_node->tcp_cntxt.rcv_nxt++;
2333 i40iw_cleanup_retrans_entry(cm_node);
2334 cm_node->state = I40IW_CM_STATE_CLOSING;
2335 i40iw_send_ack(cm_node);
2337 * Wait for ACK as this is simultaneous close.
2338 * After we receive ACK, do not send anything.
2342 case I40IW_CM_STATE_FIN_WAIT2:
2343 cm_node->tcp_cntxt.rcv_nxt++;
2344 i40iw_cleanup_retrans_entry(cm_node);
2345 cm_node->state = I40IW_CM_STATE_TIME_WAIT;
2346 i40iw_send_ack(cm_node);
2348 i40iw_schedule_cm_timer(cm_node, NULL, I40IW_TIMER_TYPE_CLOSE, 1, 0);
2350 i40iw_pr_err("node %p state = %d\n", cm_node, cm_node->state);
2352 case I40IW_CM_STATE_TIME_WAIT:
2353 cm_node->tcp_cntxt.rcv_nxt++;
2354 i40iw_cleanup_retrans_entry(cm_node);
2355 cm_node->state = I40IW_CM_STATE_CLOSED;
2356 i40iw_rem_ref_cm_node(cm_node);
2358 case I40IW_CM_STATE_OFFLOADED:
2360 i40iw_pr_err("bad state node %p state = %d\n", cm_node, cm_node->state);
2366 * i40iw_handle_rst_pkt - process received RST packet
2367 * @cm_node: connection's node
2368 * @rbuf: receive buffer
2370 static void i40iw_handle_rst_pkt(struct i40iw_cm_node *cm_node,
2371 struct i40iw_puda_buf *rbuf)
2373 i40iw_cleanup_retrans_entry(cm_node);
2374 switch (cm_node->state) {
2375 case I40IW_CM_STATE_SYN_SENT:
2376 case I40IW_CM_STATE_MPAREQ_SENT:
2377 switch (cm_node->mpa_frame_rev) {
2379 cm_node->mpa_frame_rev = IETF_MPA_V1;
2380 /* send a syn and goto syn sent state */
2381 cm_node->state = I40IW_CM_STATE_SYN_SENT;
2382 if (i40iw_send_syn(cm_node, 0))
2383 i40iw_active_open_err(cm_node, false);
2387 i40iw_active_open_err(cm_node, false);
2391 case I40IW_CM_STATE_MPAREQ_RCVD:
2392 atomic_add_return(1, &cm_node->passive_state);
2394 case I40IW_CM_STATE_ESTABLISHED:
2395 case I40IW_CM_STATE_SYN_RCVD:
2396 case I40IW_CM_STATE_LISTENING:
2397 i40iw_pr_err("Bad state state = %d\n", cm_node->state);
2398 i40iw_passive_open_err(cm_node, false);
2400 case I40IW_CM_STATE_OFFLOADED:
2401 i40iw_active_open_err(cm_node, false);
2403 case I40IW_CM_STATE_CLOSED:
2405 case I40IW_CM_STATE_FIN_WAIT2:
2406 case I40IW_CM_STATE_FIN_WAIT1:
2407 case I40IW_CM_STATE_LAST_ACK:
2408 cm_node->cm_id->rem_ref(cm_node->cm_id);
2409 case I40IW_CM_STATE_TIME_WAIT:
2410 cm_node->state = I40IW_CM_STATE_CLOSED;
2411 i40iw_rem_ref_cm_node(cm_node);
2419 * i40iw_handle_rcv_mpa - Process a recv'd mpa buffer
2420 * @cm_node: connection's node
2421 * @rbuf: receive buffer
2423 static void i40iw_handle_rcv_mpa(struct i40iw_cm_node *cm_node,
2424 struct i40iw_puda_buf *rbuf)
2427 int datasize = rbuf->datalen;
2428 u8 *dataloc = rbuf->data;
2430 enum i40iw_cm_event_type type = I40IW_CM_EVENT_UNKNOWN;
2433 ret = i40iw_parse_mpa(cm_node, dataloc, &res_type, datasize);
2435 if (cm_node->state == I40IW_CM_STATE_MPAREQ_SENT)
2436 i40iw_active_open_err(cm_node, true);
2438 i40iw_passive_open_err(cm_node, true);
2442 switch (cm_node->state) {
2443 case I40IW_CM_STATE_ESTABLISHED:
2444 if (res_type == I40IW_MPA_REQUEST_REJECT)
2445 i40iw_pr_err("state for reject\n");
2446 cm_node->state = I40IW_CM_STATE_MPAREQ_RCVD;
2447 type = I40IW_CM_EVENT_MPA_REQ;
2448 i40iw_send_ack(cm_node); /* ACK received MPA request */
2449 atomic_set(&cm_node->passive_state,
2450 I40IW_PASSIVE_STATE_INDICATED);
2452 case I40IW_CM_STATE_MPAREQ_SENT:
2453 i40iw_cleanup_retrans_entry(cm_node);
2454 if (res_type == I40IW_MPA_REQUEST_REJECT) {
2455 type = I40IW_CM_EVENT_MPA_REJECT;
2456 cm_node->state = I40IW_CM_STATE_MPAREJ_RCVD;
2458 type = I40IW_CM_EVENT_CONNECTED;
2459 cm_node->state = I40IW_CM_STATE_OFFLOADED;
2461 i40iw_send_ack(cm_node);
2464 pr_err("%s wrong cm_node state =%d\n", __func__, cm_node->state);
2467 i40iw_create_event(cm_node, type);
2471 * i40iw_indicate_pkt_err - Send up err event to cm
2472 * @cm_node: connection's node
2474 static void i40iw_indicate_pkt_err(struct i40iw_cm_node *cm_node)
2476 switch (cm_node->state) {
2477 case I40IW_CM_STATE_SYN_SENT:
2478 case I40IW_CM_STATE_MPAREQ_SENT:
2479 i40iw_active_open_err(cm_node, true);
2481 case I40IW_CM_STATE_ESTABLISHED:
2482 case I40IW_CM_STATE_SYN_RCVD:
2483 i40iw_passive_open_err(cm_node, true);
2485 case I40IW_CM_STATE_OFFLOADED:
2492 * i40iw_check_syn - Check for error on received syn ack
2493 * @cm_node: connection's node
2494 * @tcph: pointer tcp header
2496 static int i40iw_check_syn(struct i40iw_cm_node *cm_node, struct tcphdr *tcph)
2500 if (ntohl(tcph->ack_seq) != cm_node->tcp_cntxt.loc_seq_num) {
2502 i40iw_active_open_err(cm_node, true);
2508 * i40iw_check_seq - check seq numbers if OK
2509 * @cm_node: connection's node
2510 * @tcph: pointer tcp header
2512 static int i40iw_check_seq(struct i40iw_cm_node *cm_node, struct tcphdr *tcph)
2517 u32 loc_seq_num = cm_node->tcp_cntxt.loc_seq_num;
2518 u32 rcv_nxt = cm_node->tcp_cntxt.rcv_nxt;
2521 seq = ntohl(tcph->seq);
2522 ack_seq = ntohl(tcph->ack_seq);
2523 rcv_wnd = cm_node->tcp_cntxt.rcv_wnd;
2524 if (ack_seq != loc_seq_num)
2526 else if (!between(seq, rcv_nxt, (rcv_nxt + rcv_wnd)))
2529 i40iw_pr_err("seq number\n");
2530 i40iw_indicate_pkt_err(cm_node);
2536 * i40iw_handle_syn_pkt - is for Passive node
2537 * @cm_node: connection's node
2538 * @rbuf: receive buffer
2540 static void i40iw_handle_syn_pkt(struct i40iw_cm_node *cm_node,
2541 struct i40iw_puda_buf *rbuf)
2543 struct tcphdr *tcph = (struct tcphdr *)rbuf->tcph;
2547 struct i40iw_cm_info nfo;
2549 optionsize = (tcph->doff << 2) - sizeof(struct tcphdr);
2550 inc_sequence = ntohl(tcph->seq);
2552 switch (cm_node->state) {
2553 case I40IW_CM_STATE_SYN_SENT:
2554 case I40IW_CM_STATE_MPAREQ_SENT:
2555 /* Rcvd syn on active open connection */
2556 i40iw_active_open_err(cm_node, 1);
2558 case I40IW_CM_STATE_LISTENING:
2560 if (atomic_read(&cm_node->listener->pend_accepts_cnt) >
2561 cm_node->listener->backlog) {
2562 cm_node->cm_core->stats_backlog_drops++;
2563 i40iw_passive_open_err(cm_node, false);
2566 ret = i40iw_handle_tcp_options(cm_node, tcph, optionsize, 1);
2568 i40iw_passive_open_err(cm_node, false);
2572 cm_node->tcp_cntxt.rcv_nxt = inc_sequence + 1;
2573 cm_node->accept_pend = 1;
2574 atomic_inc(&cm_node->listener->pend_accepts_cnt);
2576 cm_node->state = I40IW_CM_STATE_SYN_RCVD;
2577 i40iw_get_addr_info(cm_node, &nfo);
2578 ret = i40iw_manage_qhash(cm_node->iwdev,
2580 I40IW_QHASH_TYPE_TCP_ESTABLISHED,
2581 I40IW_QHASH_MANAGE_TYPE_ADD,
2584 cm_node->qhash_set = true;
2586 case I40IW_CM_STATE_CLOSED:
2587 i40iw_cleanup_retrans_entry(cm_node);
2588 atomic_inc(&cm_node->ref_count);
2589 i40iw_send_reset(cm_node);
2591 case I40IW_CM_STATE_OFFLOADED:
2592 case I40IW_CM_STATE_ESTABLISHED:
2593 case I40IW_CM_STATE_FIN_WAIT1:
2594 case I40IW_CM_STATE_FIN_WAIT2:
2595 case I40IW_CM_STATE_MPAREQ_RCVD:
2596 case I40IW_CM_STATE_LAST_ACK:
2597 case I40IW_CM_STATE_CLOSING:
2598 case I40IW_CM_STATE_UNKNOWN:
2605 * i40iw_handle_synack_pkt - Process SYN+ACK packet (active side)
2606 * @cm_node: connection's node
2607 * @rbuf: receive buffer
2609 static void i40iw_handle_synack_pkt(struct i40iw_cm_node *cm_node,
2610 struct i40iw_puda_buf *rbuf)
2612 struct tcphdr *tcph = (struct tcphdr *)rbuf->tcph;
2617 optionsize = (tcph->doff << 2) - sizeof(struct tcphdr);
2618 inc_sequence = ntohl(tcph->seq);
2619 switch (cm_node->state) {
2620 case I40IW_CM_STATE_SYN_SENT:
2621 i40iw_cleanup_retrans_entry(cm_node);
2623 if (i40iw_check_syn(cm_node, tcph)) {
2624 i40iw_pr_err("check syn fail\n");
2627 cm_node->tcp_cntxt.rem_ack_num = ntohl(tcph->ack_seq);
2629 ret = i40iw_handle_tcp_options(cm_node, tcph, optionsize, 0);
2631 i40iw_debug(cm_node->dev,
2633 "cm_node=%p tcp_options failed\n",
2637 i40iw_cleanup_retrans_entry(cm_node);
2638 cm_node->tcp_cntxt.rcv_nxt = inc_sequence + 1;
2639 i40iw_send_ack(cm_node); /* ACK for the syn_ack */
2640 ret = i40iw_send_mpa_request(cm_node);
2642 i40iw_debug(cm_node->dev,
2644 "cm_node=%p i40iw_send_mpa_request failed\n",
2648 cm_node->state = I40IW_CM_STATE_MPAREQ_SENT;
2650 case I40IW_CM_STATE_MPAREQ_RCVD:
2651 i40iw_passive_open_err(cm_node, true);
2653 case I40IW_CM_STATE_LISTENING:
2654 cm_node->tcp_cntxt.loc_seq_num = ntohl(tcph->ack_seq);
2655 i40iw_cleanup_retrans_entry(cm_node);
2656 cm_node->state = I40IW_CM_STATE_CLOSED;
2657 i40iw_send_reset(cm_node);
2659 case I40IW_CM_STATE_CLOSED:
2660 cm_node->tcp_cntxt.loc_seq_num = ntohl(tcph->ack_seq);
2661 i40iw_cleanup_retrans_entry(cm_node);
2662 atomic_inc(&cm_node->ref_count);
2663 i40iw_send_reset(cm_node);
2665 case I40IW_CM_STATE_ESTABLISHED:
2666 case I40IW_CM_STATE_FIN_WAIT1:
2667 case I40IW_CM_STATE_FIN_WAIT2:
2668 case I40IW_CM_STATE_LAST_ACK:
2669 case I40IW_CM_STATE_OFFLOADED:
2670 case I40IW_CM_STATE_CLOSING:
2671 case I40IW_CM_STATE_UNKNOWN:
2672 case I40IW_CM_STATE_MPAREQ_SENT:
2679 * i40iw_handle_ack_pkt - process packet with ACK
2680 * @cm_node: connection's node
2681 * @rbuf: receive buffer
2683 static int i40iw_handle_ack_pkt(struct i40iw_cm_node *cm_node,
2684 struct i40iw_puda_buf *rbuf)
2686 struct tcphdr *tcph = (struct tcphdr *)rbuf->tcph;
2690 u32 datasize = rbuf->datalen;
2692 optionsize = (tcph->doff << 2) - sizeof(struct tcphdr);
2694 if (i40iw_check_seq(cm_node, tcph))
2697 inc_sequence = ntohl(tcph->seq);
2698 switch (cm_node->state) {
2699 case I40IW_CM_STATE_SYN_RCVD:
2700 i40iw_cleanup_retrans_entry(cm_node);
2701 ret = i40iw_handle_tcp_options(cm_node, tcph, optionsize, 1);
2704 cm_node->tcp_cntxt.rem_ack_num = ntohl(tcph->ack_seq);
2705 cm_node->state = I40IW_CM_STATE_ESTABLISHED;
2707 cm_node->tcp_cntxt.rcv_nxt = inc_sequence + datasize;
2708 i40iw_handle_rcv_mpa(cm_node, rbuf);
2711 case I40IW_CM_STATE_ESTABLISHED:
2712 i40iw_cleanup_retrans_entry(cm_node);
2714 cm_node->tcp_cntxt.rcv_nxt = inc_sequence + datasize;
2715 i40iw_handle_rcv_mpa(cm_node, rbuf);
2718 case I40IW_CM_STATE_MPAREQ_SENT:
2719 cm_node->tcp_cntxt.rem_ack_num = ntohl(tcph->ack_seq);
2721 cm_node->tcp_cntxt.rcv_nxt = inc_sequence + datasize;
2722 i40iw_handle_rcv_mpa(cm_node, rbuf);
2725 case I40IW_CM_STATE_LISTENING:
2726 i40iw_cleanup_retrans_entry(cm_node);
2727 cm_node->state = I40IW_CM_STATE_CLOSED;
2728 i40iw_send_reset(cm_node);
2730 case I40IW_CM_STATE_CLOSED:
2731 i40iw_cleanup_retrans_entry(cm_node);
2732 atomic_inc(&cm_node->ref_count);
2733 i40iw_send_reset(cm_node);
2735 case I40IW_CM_STATE_LAST_ACK:
2736 case I40IW_CM_STATE_CLOSING:
2737 i40iw_cleanup_retrans_entry(cm_node);
2738 cm_node->state = I40IW_CM_STATE_CLOSED;
2739 if (!cm_node->accept_pend)
2740 cm_node->cm_id->rem_ref(cm_node->cm_id);
2741 i40iw_rem_ref_cm_node(cm_node);
2743 case I40IW_CM_STATE_FIN_WAIT1:
2744 i40iw_cleanup_retrans_entry(cm_node);
2745 cm_node->state = I40IW_CM_STATE_FIN_WAIT2;
2747 case I40IW_CM_STATE_SYN_SENT:
2748 case I40IW_CM_STATE_FIN_WAIT2:
2749 case I40IW_CM_STATE_OFFLOADED:
2750 case I40IW_CM_STATE_MPAREQ_RCVD:
2751 case I40IW_CM_STATE_UNKNOWN:
2753 i40iw_cleanup_retrans_entry(cm_node);
2760 * i40iw_process_packet - process cm packet
2761 * @cm_node: connection's node
2762 * @rbuf: receive buffer
2764 static void i40iw_process_packet(struct i40iw_cm_node *cm_node,
2765 struct i40iw_puda_buf *rbuf)
2767 enum i40iw_tcpip_pkt_type pkt_type = I40IW_PKT_TYPE_UNKNOWN;
2768 struct tcphdr *tcph = (struct tcphdr *)rbuf->tcph;
2773 pkt_type = I40IW_PKT_TYPE_RST;
2774 } else if (tcph->syn) {
2775 pkt_type = I40IW_PKT_TYPE_SYN;
2777 pkt_type = I40IW_PKT_TYPE_SYNACK;
2778 } else if (tcph->ack) {
2779 pkt_type = I40IW_PKT_TYPE_ACK;
2785 case I40IW_PKT_TYPE_SYN:
2786 i40iw_handle_syn_pkt(cm_node, rbuf);
2788 case I40IW_PKT_TYPE_SYNACK:
2789 i40iw_handle_synack_pkt(cm_node, rbuf);
2791 case I40IW_PKT_TYPE_ACK:
2792 ret = i40iw_handle_ack_pkt(cm_node, rbuf);
2793 if (fin_set && !ret)
2794 i40iw_handle_fin_pkt(cm_node);
2796 case I40IW_PKT_TYPE_RST:
2797 i40iw_handle_rst_pkt(cm_node, rbuf);
2801 (!i40iw_check_seq(cm_node, (struct tcphdr *)rbuf->tcph)))
2802 i40iw_handle_fin_pkt(cm_node);
2808 * i40iw_make_listen_node - create a listen node with params
2809 * @cm_core: cm's core
2810 * @iwdev: iwarp device structure
2811 * @cm_info: quad info for connection
2813 static struct i40iw_cm_listener *i40iw_make_listen_node(
2814 struct i40iw_cm_core *cm_core,
2815 struct i40iw_device *iwdev,
2816 struct i40iw_cm_info *cm_info)
2818 struct i40iw_cm_listener *listener;
2819 unsigned long flags;
2821 /* cannot have multiple matching listeners */
2822 listener = i40iw_find_listener(cm_core, cm_info->loc_addr,
2825 I40IW_CM_LISTENER_EITHER_STATE);
2827 (listener->listener_state == I40IW_CM_LISTENER_ACTIVE_STATE)) {
2828 atomic_dec(&listener->ref_count);
2829 i40iw_debug(cm_core->dev,
2831 "Not creating listener since it already exists\n");
2836 /* create a CM listen node (1/2 node to compare incoming traffic to) */
2837 listener = kzalloc(sizeof(*listener), GFP_ATOMIC);
2840 cm_core->stats_listen_nodes_created++;
2841 memcpy(listener->loc_addr, cm_info->loc_addr, sizeof(listener->loc_addr));
2842 listener->loc_port = cm_info->loc_port;
2844 INIT_LIST_HEAD(&listener->child_listen_list);
2846 atomic_set(&listener->ref_count, 1);
2848 listener->reused_node = 1;
2851 listener->cm_id = cm_info->cm_id;
2852 listener->ipv4 = cm_info->ipv4;
2853 listener->vlan_id = cm_info->vlan_id;
2854 atomic_set(&listener->pend_accepts_cnt, 0);
2855 listener->cm_core = cm_core;
2856 listener->iwdev = iwdev;
2858 listener->backlog = cm_info->backlog;
2859 listener->listener_state = I40IW_CM_LISTENER_ACTIVE_STATE;
2861 if (!listener->reused_node) {
2862 spin_lock_irqsave(&cm_core->listen_list_lock, flags);
2863 list_add(&listener->list, &cm_core->listen_nodes);
2864 spin_unlock_irqrestore(&cm_core->listen_list_lock, flags);
2871 * i40iw_create_cm_node - make a connection node with params
2872 * @cm_core: cm's core
2873 * @iwdev: iwarp device structure
2874 * @private_data_len: len to provate data for mpa request
2875 * @private_data: pointer to private data for connection
2876 * @cm_info: quad info for connection
2878 static struct i40iw_cm_node *i40iw_create_cm_node(
2879 struct i40iw_cm_core *cm_core,
2880 struct i40iw_device *iwdev,
2881 u16 private_data_len,
2883 struct i40iw_cm_info *cm_info)
2885 struct i40iw_cm_node *cm_node;
2886 struct i40iw_cm_listener *loopback_remotelistener;
2887 struct i40iw_cm_node *loopback_remotenode;
2888 struct i40iw_cm_info loopback_cm_info;
2890 /* create a CM connection node */
2891 cm_node = i40iw_make_cm_node(cm_core, iwdev, cm_info, NULL);
2893 return ERR_PTR(-ENOMEM);
2894 /* set our node side to client (active) side */
2895 cm_node->tcp_cntxt.client = 1;
2896 cm_node->tcp_cntxt.rcv_wscale = I40IW_CM_DEFAULT_RCV_WND_SCALE;
2898 if (!memcmp(cm_info->loc_addr, cm_info->rem_addr, sizeof(cm_info->loc_addr))) {
2899 loopback_remotelistener = i40iw_find_listener(
2904 I40IW_CM_LISTENER_ACTIVE_STATE);
2905 if (!loopback_remotelistener) {
2906 i40iw_rem_ref_cm_node(cm_node);
2907 return ERR_PTR(-ECONNREFUSED);
2909 loopback_cm_info = *cm_info;
2910 loopback_cm_info.loc_port = cm_info->rem_port;
2911 loopback_cm_info.rem_port = cm_info->loc_port;
2912 loopback_cm_info.cm_id = loopback_remotelistener->cm_id;
2913 loopback_cm_info.ipv4 = cm_info->ipv4;
2914 loopback_remotenode = i40iw_make_cm_node(cm_core,
2917 loopback_remotelistener);
2918 if (!loopback_remotenode) {
2919 i40iw_rem_ref_cm_node(cm_node);
2920 return ERR_PTR(-ENOMEM);
2922 cm_core->stats_loopbacks++;
2923 loopback_remotenode->loopbackpartner = cm_node;
2924 loopback_remotenode->tcp_cntxt.rcv_wscale =
2925 I40IW_CM_DEFAULT_RCV_WND_SCALE;
2926 cm_node->loopbackpartner = loopback_remotenode;
2927 memcpy(loopback_remotenode->pdata_buf, private_data,
2929 loopback_remotenode->pdata.size = private_data_len;
2931 cm_node->state = I40IW_CM_STATE_OFFLOADED;
2932 cm_node->tcp_cntxt.rcv_nxt =
2933 loopback_remotenode->tcp_cntxt.loc_seq_num;
2934 loopback_remotenode->tcp_cntxt.rcv_nxt =
2935 cm_node->tcp_cntxt.loc_seq_num;
2936 cm_node->tcp_cntxt.max_snd_wnd =
2937 loopback_remotenode->tcp_cntxt.rcv_wnd;
2938 loopback_remotenode->tcp_cntxt.max_snd_wnd = cm_node->tcp_cntxt.rcv_wnd;
2939 cm_node->tcp_cntxt.snd_wnd = loopback_remotenode->tcp_cntxt.rcv_wnd;
2940 loopback_remotenode->tcp_cntxt.snd_wnd = cm_node->tcp_cntxt.rcv_wnd;
2941 cm_node->tcp_cntxt.snd_wscale = loopback_remotenode->tcp_cntxt.rcv_wscale;
2942 loopback_remotenode->tcp_cntxt.snd_wscale = cm_node->tcp_cntxt.rcv_wscale;
2943 loopback_remotenode->state = I40IW_CM_STATE_MPAREQ_RCVD;
2944 i40iw_create_event(loopback_remotenode, I40IW_CM_EVENT_MPA_REQ);
2949 cm_node->pdata.size = private_data_len;
2950 cm_node->pdata.addr = cm_node->pdata_buf;
2952 memcpy(cm_node->pdata_buf, private_data, private_data_len);
2954 cm_node->state = I40IW_CM_STATE_SYN_SENT;
2959 * i40iw_cm_reject - reject and teardown a connection
2960 * @cm_node: connection's node
2961 * @pdate: ptr to private data for reject
2962 * @plen: size of private data
2964 static int i40iw_cm_reject(struct i40iw_cm_node *cm_node, const void *pdata, u8 plen)
2969 struct iw_cm_id *cm_id = cm_node->cm_id;
2970 struct i40iw_cm_node *loopback = cm_node->loopbackpartner;
2972 if (cm_node->tcp_cntxt.client)
2974 i40iw_cleanup_retrans_entry(cm_node);
2977 passive_state = atomic_add_return(1, &cm_node->passive_state);
2978 if (passive_state == I40IW_SEND_RESET_EVENT) {
2979 cm_node->state = I40IW_CM_STATE_CLOSED;
2980 i40iw_rem_ref_cm_node(cm_node);
2982 if (cm_node->state == I40IW_CM_STATE_LISTENER_DESTROYED) {
2983 i40iw_rem_ref_cm_node(cm_node);
2985 ret = i40iw_send_mpa_reject(cm_node, pdata, plen);
2987 cm_node->state = I40IW_CM_STATE_CLOSED;
2988 err = i40iw_send_reset(cm_node);
2990 i40iw_pr_err("send reset failed\n");
2992 cm_id->add_ref(cm_id);
2997 cm_node->cm_id = NULL;
2998 if (cm_node->state == I40IW_CM_STATE_LISTENER_DESTROYED) {
2999 i40iw_rem_ref_cm_node(cm_node);
3000 i40iw_rem_ref_cm_node(loopback);
3002 ret = i40iw_send_cm_event(loopback,
3004 IW_CM_EVENT_CONNECT_REPLY,
3006 i40iw_rem_ref_cm_node(cm_node);
3007 loopback->state = I40IW_CM_STATE_CLOSING;
3009 cm_id = loopback->cm_id;
3010 i40iw_rem_ref_cm_node(loopback);
3011 cm_id->rem_ref(cm_id);
3019 * i40iw_cm_close - close of cm connection
3020 * @cm_node: connection's node
3022 static int i40iw_cm_close(struct i40iw_cm_node *cm_node)
3029 switch (cm_node->state) {
3030 case I40IW_CM_STATE_SYN_RCVD:
3031 case I40IW_CM_STATE_SYN_SENT:
3032 case I40IW_CM_STATE_ONE_SIDE_ESTABLISHED:
3033 case I40IW_CM_STATE_ESTABLISHED:
3034 case I40IW_CM_STATE_ACCEPTING:
3035 case I40IW_CM_STATE_MPAREQ_SENT:
3036 case I40IW_CM_STATE_MPAREQ_RCVD:
3037 i40iw_cleanup_retrans_entry(cm_node);
3038 i40iw_send_reset(cm_node);
3040 case I40IW_CM_STATE_CLOSE_WAIT:
3041 cm_node->state = I40IW_CM_STATE_LAST_ACK;
3042 i40iw_send_fin(cm_node);
3044 case I40IW_CM_STATE_FIN_WAIT1:
3045 case I40IW_CM_STATE_FIN_WAIT2:
3046 case I40IW_CM_STATE_LAST_ACK:
3047 case I40IW_CM_STATE_TIME_WAIT:
3048 case I40IW_CM_STATE_CLOSING:
3051 case I40IW_CM_STATE_LISTENING:
3052 i40iw_cleanup_retrans_entry(cm_node);
3053 i40iw_send_reset(cm_node);
3055 case I40IW_CM_STATE_MPAREJ_RCVD:
3056 case I40IW_CM_STATE_UNKNOWN:
3057 case I40IW_CM_STATE_INITED:
3058 case I40IW_CM_STATE_CLOSED:
3059 case I40IW_CM_STATE_LISTENER_DESTROYED:
3060 i40iw_rem_ref_cm_node(cm_node);
3062 case I40IW_CM_STATE_OFFLOADED:
3063 if (cm_node->send_entry)
3064 i40iw_pr_err("send_entry\n");
3065 i40iw_rem_ref_cm_node(cm_node);
3072 * i40iw_receive_ilq - recv an ETHERNET packet, and process it
3074 * @vsi: pointer to the vsi structure
3075 * @rbuf: receive buffer
3077 void i40iw_receive_ilq(struct i40iw_sc_vsi *vsi, struct i40iw_puda_buf *rbuf)
3079 struct i40iw_cm_node *cm_node;
3080 struct i40iw_cm_listener *listener;
3082 struct ipv6hdr *ip6h;
3083 struct tcphdr *tcph;
3084 struct i40iw_cm_info cm_info;
3085 struct i40iw_sc_dev *dev = vsi->dev;
3086 struct i40iw_device *iwdev = (struct i40iw_device *)dev->back_dev;
3087 struct i40iw_cm_core *cm_core = &iwdev->cm_core;
3088 struct vlan_ethhdr *ethh;
3091 /* if vlan, then maclen = 18 else 14 */
3092 iph = (struct iphdr *)rbuf->iph;
3093 memset(&cm_info, 0, sizeof(cm_info));
3095 i40iw_debug_buf(dev,
3097 "RECEIVE ILQ BUFFER",
3100 ethh = (struct vlan_ethhdr *)rbuf->mem.va;
3102 if (ethh->h_vlan_proto == htons(ETH_P_8021Q)) {
3103 vtag = ntohs(ethh->h_vlan_TCI);
3104 cm_info.user_pri = (vtag & VLAN_PRIO_MASK) >> VLAN_PRIO_SHIFT;
3105 cm_info.vlan_id = vtag & VLAN_VID_MASK;
3106 i40iw_debug(cm_core->dev,
3112 cm_info.vlan_id = I40IW_NO_VLAN;
3114 tcph = (struct tcphdr *)rbuf->tcph;
3117 cm_info.loc_addr[0] = ntohl(iph->daddr);
3118 cm_info.rem_addr[0] = ntohl(iph->saddr);
3119 cm_info.ipv4 = true;
3120 cm_info.tos = iph->tos;
3122 ip6h = (struct ipv6hdr *)rbuf->iph;
3123 i40iw_copy_ip_ntohl(cm_info.loc_addr,
3124 ip6h->daddr.in6_u.u6_addr32);
3125 i40iw_copy_ip_ntohl(cm_info.rem_addr,
3126 ip6h->saddr.in6_u.u6_addr32);
3127 cm_info.ipv4 = false;
3128 cm_info.tos = (ip6h->priority << 4) | (ip6h->flow_lbl[0] >> 4);
3130 cm_info.loc_port = ntohs(tcph->dest);
3131 cm_info.rem_port = ntohs(tcph->source);
3132 cm_node = i40iw_find_node(cm_core,
3140 /* Only type of packet accepted are for */
3141 /* the PASSIVE open (syn only) */
3142 if (!tcph->syn || tcph->ack)
3145 i40iw_find_listener(cm_core,
3149 I40IW_CM_LISTENER_ACTIVE_STATE);
3151 cm_info.cm_id = NULL;
3152 i40iw_debug(cm_core->dev,
3154 "%s no listener found\n",
3158 cm_info.cm_id = listener->cm_id;
3159 cm_node = i40iw_make_cm_node(cm_core, iwdev, &cm_info, listener);
3161 i40iw_debug(cm_core->dev,
3163 "%s allocate node failed\n",
3165 atomic_dec(&listener->ref_count);
3168 if (!tcph->rst && !tcph->fin) {
3169 cm_node->state = I40IW_CM_STATE_LISTENING;
3171 i40iw_rem_ref_cm_node(cm_node);
3174 atomic_inc(&cm_node->ref_count);
3175 } else if (cm_node->state == I40IW_CM_STATE_OFFLOADED) {
3176 i40iw_rem_ref_cm_node(cm_node);
3179 i40iw_process_packet(cm_node, rbuf);
3180 i40iw_rem_ref_cm_node(cm_node);
3184 * i40iw_setup_cm_core - allocate a top level instance of a cm
3186 * @iwdev: iwarp device structure
3188 void i40iw_setup_cm_core(struct i40iw_device *iwdev)
3190 struct i40iw_cm_core *cm_core = &iwdev->cm_core;
3192 cm_core->iwdev = iwdev;
3193 cm_core->dev = &iwdev->sc_dev;
3195 INIT_LIST_HEAD(&cm_core->connected_nodes);
3196 INIT_LIST_HEAD(&cm_core->listen_nodes);
3198 setup_timer(&cm_core->tcp_timer, i40iw_cm_timer_tick,
3199 (unsigned long)cm_core);
3201 spin_lock_init(&cm_core->ht_lock);
3202 spin_lock_init(&cm_core->listen_list_lock);
3204 cm_core->event_wq = alloc_ordered_workqueue("iwewq",
3207 cm_core->disconn_wq = alloc_ordered_workqueue("iwdwq",
3212 * i40iw_cleanup_cm_core - deallocate a top level instance of a
3214 * @cm_core: cm's core
3216 void i40iw_cleanup_cm_core(struct i40iw_cm_core *cm_core)
3218 unsigned long flags;
3223 spin_lock_irqsave(&cm_core->ht_lock, flags);
3224 if (timer_pending(&cm_core->tcp_timer))
3225 del_timer_sync(&cm_core->tcp_timer);
3226 spin_unlock_irqrestore(&cm_core->ht_lock, flags);
3228 destroy_workqueue(cm_core->event_wq);
3229 destroy_workqueue(cm_core->disconn_wq);
3233 * i40iw_init_tcp_ctx - setup qp context
3234 * @cm_node: connection's node
3235 * @tcp_info: offload info for tcp
3236 * @iwqp: associate qp for the connection
3238 static void i40iw_init_tcp_ctx(struct i40iw_cm_node *cm_node,
3239 struct i40iw_tcp_offload_info *tcp_info,
3240 struct i40iw_qp *iwqp)
3242 tcp_info->ipv4 = cm_node->ipv4;
3243 tcp_info->drop_ooo_seg = true;
3244 tcp_info->wscale = true;
3245 tcp_info->ignore_tcp_opt = true;
3246 tcp_info->ignore_tcp_uns_opt = true;
3247 tcp_info->no_nagle = false;
3249 tcp_info->ttl = I40IW_DEFAULT_TTL;
3250 tcp_info->rtt_var = cpu_to_le32(I40IW_DEFAULT_RTT_VAR);
3251 tcp_info->ss_thresh = cpu_to_le32(I40IW_DEFAULT_SS_THRESH);
3252 tcp_info->rexmit_thresh = I40IW_DEFAULT_REXMIT_THRESH;
3254 tcp_info->tcp_state = I40IW_TCP_STATE_ESTABLISHED;
3255 tcp_info->snd_wscale = cm_node->tcp_cntxt.snd_wscale;
3256 tcp_info->rcv_wscale = cm_node->tcp_cntxt.rcv_wscale;
3258 tcp_info->snd_nxt = cpu_to_le32(cm_node->tcp_cntxt.loc_seq_num);
3259 tcp_info->snd_wnd = cpu_to_le32(cm_node->tcp_cntxt.snd_wnd);
3260 tcp_info->rcv_nxt = cpu_to_le32(cm_node->tcp_cntxt.rcv_nxt);
3261 tcp_info->snd_max = cpu_to_le32(cm_node->tcp_cntxt.loc_seq_num);
3263 tcp_info->snd_una = cpu_to_le32(cm_node->tcp_cntxt.loc_seq_num);
3264 tcp_info->cwnd = cpu_to_le32(2 * cm_node->tcp_cntxt.mss);
3265 tcp_info->snd_wl1 = cpu_to_le32(cm_node->tcp_cntxt.rcv_nxt);
3266 tcp_info->snd_wl2 = cpu_to_le32(cm_node->tcp_cntxt.loc_seq_num);
3267 tcp_info->max_snd_window = cpu_to_le32(cm_node->tcp_cntxt.max_snd_wnd);
3268 tcp_info->rcv_wnd = cpu_to_le32(cm_node->tcp_cntxt.rcv_wnd <<
3269 cm_node->tcp_cntxt.rcv_wscale);
3271 tcp_info->flow_label = 0;
3272 tcp_info->snd_mss = cpu_to_le32(((u32)cm_node->tcp_cntxt.mss));
3273 if (cm_node->vlan_id < VLAN_TAG_PRESENT) {
3274 tcp_info->insert_vlan_tag = true;
3275 tcp_info->vlan_tag = cpu_to_le16(((u16)cm_node->user_pri << I40IW_VLAN_PRIO_SHIFT) |
3278 if (cm_node->ipv4) {
3279 tcp_info->src_port = cpu_to_le16(cm_node->loc_port);
3280 tcp_info->dst_port = cpu_to_le16(cm_node->rem_port);
3282 tcp_info->dest_ip_addr3 = cpu_to_le32(cm_node->rem_addr[0]);
3283 tcp_info->local_ipaddr3 = cpu_to_le32(cm_node->loc_addr[0]);
3285 cpu_to_le16((u16)i40iw_arp_table(
3287 &tcp_info->dest_ip_addr3,
3290 I40IW_ARP_RESOLVE));
3292 tcp_info->src_port = cpu_to_le16(cm_node->loc_port);
3293 tcp_info->dst_port = cpu_to_le16(cm_node->rem_port);
3294 tcp_info->dest_ip_addr0 = cpu_to_le32(cm_node->rem_addr[0]);
3295 tcp_info->dest_ip_addr1 = cpu_to_le32(cm_node->rem_addr[1]);
3296 tcp_info->dest_ip_addr2 = cpu_to_le32(cm_node->rem_addr[2]);
3297 tcp_info->dest_ip_addr3 = cpu_to_le32(cm_node->rem_addr[3]);
3298 tcp_info->local_ipaddr0 = cpu_to_le32(cm_node->loc_addr[0]);
3299 tcp_info->local_ipaddr1 = cpu_to_le32(cm_node->loc_addr[1]);
3300 tcp_info->local_ipaddr2 = cpu_to_le32(cm_node->loc_addr[2]);
3301 tcp_info->local_ipaddr3 = cpu_to_le32(cm_node->loc_addr[3]);
3303 cpu_to_le16((u16)i40iw_arp_table(
3305 &tcp_info->dest_ip_addr0,
3308 I40IW_ARP_RESOLVE));
3313 * i40iw_cm_init_tsa_conn - setup qp for RTS
3314 * @iwqp: associate qp for the connection
3315 * @cm_node: connection's node
3317 static void i40iw_cm_init_tsa_conn(struct i40iw_qp *iwqp,
3318 struct i40iw_cm_node *cm_node)
3320 struct i40iw_tcp_offload_info tcp_info;
3321 struct i40iwarp_offload_info *iwarp_info;
3322 struct i40iw_qp_host_ctx_info *ctx_info;
3323 struct i40iw_device *iwdev = iwqp->iwdev;
3324 struct i40iw_sc_dev *dev = &iwqp->iwdev->sc_dev;
3326 memset(&tcp_info, 0x00, sizeof(struct i40iw_tcp_offload_info));
3327 iwarp_info = &iwqp->iwarp_info;
3328 ctx_info = &iwqp->ctx_info;
3330 ctx_info->tcp_info = &tcp_info;
3331 ctx_info->send_cq_num = iwqp->iwscq->sc_cq.cq_uk.cq_id;
3332 ctx_info->rcv_cq_num = iwqp->iwrcq->sc_cq.cq_uk.cq_id;
3334 iwarp_info->ord_size = cm_node->ord_size;
3335 iwarp_info->ird_size = i40iw_derive_hw_ird_setting(cm_node->ird_size);
3337 if (iwarp_info->ord_size == 1)
3338 iwarp_info->ord_size = 2;
3340 iwarp_info->rd_enable = true;
3341 iwarp_info->rdmap_ver = 1;
3342 iwarp_info->ddp_ver = 1;
3344 iwarp_info->pd_id = iwqp->iwpd->sc_pd.pd_id;
3346 ctx_info->tcp_info_valid = true;
3347 ctx_info->iwarp_info_valid = true;
3348 ctx_info->add_to_qoslist = true;
3349 ctx_info->user_pri = cm_node->user_pri;
3351 i40iw_init_tcp_ctx(cm_node, &tcp_info, iwqp);
3352 if (cm_node->snd_mark_en) {
3353 iwarp_info->snd_mark_en = true;
3354 iwarp_info->snd_mark_offset = (tcp_info.snd_nxt &
3355 SNDMARKER_SEQNMASK) + cm_node->lsmm_size;
3358 cm_node->state = I40IW_CM_STATE_OFFLOADED;
3359 tcp_info.tcp_state = I40IW_TCP_STATE_ESTABLISHED;
3360 tcp_info.src_mac_addr_idx = iwdev->mac_ip_table_idx;
3361 tcp_info.tos = cm_node->tos;
3363 dev->iw_priv_qp_ops->qp_setctx(&iwqp->sc_qp, (u64 *)(iwqp->host_ctx.va), ctx_info);
3365 /* once tcp_info is set, no need to do it again */
3366 ctx_info->tcp_info_valid = false;
3367 ctx_info->iwarp_info_valid = false;
3368 ctx_info->add_to_qoslist = false;
3372 * i40iw_cm_disconn - when a connection is being closed
3373 * @iwqp: associate qp for the connection
3375 void i40iw_cm_disconn(struct i40iw_qp *iwqp)
3377 struct disconn_work *work;
3378 struct i40iw_device *iwdev = iwqp->iwdev;
3379 struct i40iw_cm_core *cm_core = &iwdev->cm_core;
3380 unsigned long flags;
3382 work = kzalloc(sizeof(*work), GFP_ATOMIC);
3384 return; /* Timer will clean up */
3386 spin_lock_irqsave(&iwdev->qptable_lock, flags);
3387 if (!iwdev->qp_table[iwqp->ibqp.qp_num]) {
3388 spin_unlock_irqrestore(&iwdev->qptable_lock, flags);
3389 i40iw_debug(&iwdev->sc_dev, I40IW_DEBUG_CM,
3390 "%s qp_id %d is already freed\n",
3391 __func__, iwqp->ibqp.qp_num);
3395 i40iw_add_ref(&iwqp->ibqp);
3396 spin_unlock_irqrestore(&iwdev->qptable_lock, flags);
3399 INIT_WORK(&work->work, i40iw_disconnect_worker);
3400 queue_work(cm_core->disconn_wq, &work->work);
3405 * i40iw_qp_disconnect - free qp and close cm
3406 * @iwqp: associate qp for the connection
3408 static void i40iw_qp_disconnect(struct i40iw_qp *iwqp)
3410 struct i40iw_device *iwdev;
3411 struct i40iw_ib_device *iwibdev;
3413 iwdev = to_iwdev(iwqp->ibqp.device);
3415 i40iw_pr_err("iwdev == NULL\n");
3419 iwibdev = iwdev->iwibdev;
3421 if (iwqp->active_conn) {
3422 /* indicate this connection is NOT active */
3423 iwqp->active_conn = 0;
3425 /* Need to free the Last Streaming Mode Message */
3426 if (iwqp->ietf_mem.va) {
3428 iwibdev->ibdev.dereg_mr(iwqp->lsmm_mr);
3429 i40iw_free_dma_mem(iwdev->sc_dev.hw, &iwqp->ietf_mem);
3433 /* close the CM node down if it is still active */
3434 if (iwqp->cm_node) {
3435 i40iw_debug(&iwdev->sc_dev, I40IW_DEBUG_CM, "%s Call close API\n", __func__);
3436 i40iw_cm_close(iwqp->cm_node);
3441 * i40iw_cm_disconn_true - called by worker thread to disconnect qp
3442 * @iwqp: associate qp for the connection
3444 static void i40iw_cm_disconn_true(struct i40iw_qp *iwqp)
3446 struct iw_cm_id *cm_id;
3447 struct i40iw_device *iwdev;
3448 struct i40iw_sc_qp *qp = &iwqp->sc_qp;
3450 u8 original_hw_tcp_state;
3451 u8 original_ibqp_state;
3452 int disconn_status = 0;
3453 int issue_disconn = 0;
3454 int issue_close = 0;
3455 int issue_flush = 0;
3456 struct ib_event ibevent;
3457 unsigned long flags;
3461 i40iw_pr_err("iwqp == NULL\n");
3465 spin_lock_irqsave(&iwqp->lock, flags);
3466 cm_id = iwqp->cm_id;
3467 /* make sure we havent already closed this connection */
3469 spin_unlock_irqrestore(&iwqp->lock, flags);
3473 iwdev = to_iwdev(iwqp->ibqp.device);
3475 original_hw_tcp_state = iwqp->hw_tcp_state;
3476 original_ibqp_state = iwqp->ibqp_state;
3477 last_ae = iwqp->last_aeq;
3479 if (qp->term_flags) {
3483 /*When term timer expires after cm_timer, don't want
3484 *terminate-handler to issue cm_disconn which can re-free
3485 *a QP even after its refcnt=0.
3487 i40iw_terminate_del_timer(qp);
3488 if (!iwqp->flush_issued) {
3489 iwqp->flush_issued = 1;
3492 } else if ((original_hw_tcp_state == I40IW_TCP_STATE_CLOSE_WAIT) ||
3493 ((original_ibqp_state == IB_QPS_RTS) &&
3494 (last_ae == I40IW_AE_LLP_CONNECTION_RESET))) {
3496 if (last_ae == I40IW_AE_LLP_CONNECTION_RESET)
3497 disconn_status = -ECONNRESET;
3500 if (((original_hw_tcp_state == I40IW_TCP_STATE_CLOSED) ||
3501 (original_hw_tcp_state == I40IW_TCP_STATE_TIME_WAIT) ||
3502 (last_ae == I40IW_AE_RDMAP_ROE_BAD_LLP_CLOSE) ||
3503 (last_ae == I40IW_AE_LLP_CONNECTION_RESET) ||
3507 if (!iwqp->flush_issued) {
3508 iwqp->flush_issued = 1;
3513 spin_unlock_irqrestore(&iwqp->lock, flags);
3514 if (issue_flush && !iwqp->destroyed) {
3515 /* Flush the queues */
3516 i40iw_flush_wqes(iwdev, iwqp);
3518 if (qp->term_flags && iwqp->ibqp.event_handler) {
3519 ibevent.device = iwqp->ibqp.device;
3520 ibevent.event = (qp->eventtype == TERM_EVENT_QP_FATAL) ?
3521 IB_EVENT_QP_FATAL : IB_EVENT_QP_ACCESS_ERR;
3522 ibevent.element.qp = &iwqp->ibqp;
3523 iwqp->ibqp.event_handler(&ibevent, iwqp->ibqp.qp_context);
3527 if (cm_id && cm_id->event_handler) {
3528 if (issue_disconn) {
3529 ret = i40iw_send_cm_event(NULL,
3531 IW_CM_EVENT_DISCONNECT,
3535 i40iw_debug(&iwdev->sc_dev,
3537 "disconnect event failed %s: - cm_id = %p\n",
3541 i40iw_qp_disconnect(iwqp);
3542 cm_id->provider_data = iwqp;
3543 ret = i40iw_send_cm_event(NULL, cm_id, IW_CM_EVENT_CLOSE, 0);
3545 i40iw_debug(&iwdev->sc_dev,
3547 "close event failed %s: - cm_id = %p\n",
3549 cm_id->rem_ref(cm_id);
3555 * i40iw_disconnect_worker - worker for connection close
3556 * @work: points or disconn structure
3558 static void i40iw_disconnect_worker(struct work_struct *work)
3560 struct disconn_work *dwork = container_of(work, struct disconn_work, work);
3561 struct i40iw_qp *iwqp = dwork->iwqp;
3564 i40iw_cm_disconn_true(iwqp);
3565 i40iw_rem_ref(&iwqp->ibqp);
3569 * i40iw_accept - registered call for connection to be accepted
3570 * @cm_id: cm information for passive connection
3571 * @conn_param: accpet parameters
3573 int i40iw_accept(struct iw_cm_id *cm_id, struct iw_cm_conn_param *conn_param)
3576 struct i40iw_qp *iwqp;
3577 struct i40iw_device *iwdev;
3578 struct i40iw_sc_dev *dev;
3579 struct i40iw_cm_node *cm_node;
3580 struct ib_qp_attr attr;
3583 struct i40iw_pd *iwpd;
3585 struct i40iw_kmem_info accept;
3586 enum i40iw_status_code status;
3589 memset(&attr, 0, sizeof(attr));
3590 ibqp = i40iw_get_qp(cm_id->device, conn_param->qpn);
3594 iwqp = to_iwqp(ibqp);
3595 iwdev = iwqp->iwdev;
3596 dev = &iwdev->sc_dev;
3597 cm_node = (struct i40iw_cm_node *)cm_id->provider_data;
3599 if (((struct sockaddr_in *)&cm_id->local_addr)->sin_family == AF_INET) {
3600 cm_node->ipv4 = true;
3601 cm_node->vlan_id = i40iw_get_vlan_ipv4(cm_node->loc_addr);
3603 cm_node->ipv4 = false;
3604 i40iw_netdev_vlan_ipv6(cm_node->loc_addr, &cm_node->vlan_id);
3606 i40iw_debug(cm_node->dev,
3608 "Accept vlan_id=%d\n",
3610 if (cm_node->state == I40IW_CM_STATE_LISTENER_DESTROYED) {
3611 if (cm_node->loopbackpartner)
3612 i40iw_rem_ref_cm_node(cm_node->loopbackpartner);
3613 i40iw_rem_ref_cm_node(cm_node);
3617 passive_state = atomic_add_return(1, &cm_node->passive_state);
3618 if (passive_state == I40IW_SEND_RESET_EVENT) {
3619 i40iw_rem_ref_cm_node(cm_node);
3623 cm_node->cm_core->stats_accepts++;
3624 iwqp->cm_node = (void *)cm_node;
3625 cm_node->iwqp = iwqp;
3627 buf_len = conn_param->private_data_len + I40IW_MAX_IETF_SIZE;
3629 status = i40iw_allocate_dma_mem(dev->hw, &iwqp->ietf_mem, buf_len, 1);
3633 cm_node->pdata.size = conn_param->private_data_len;
3634 accept.addr = iwqp->ietf_mem.va;
3635 accept.size = i40iw_cm_build_mpa_frame(cm_node, &accept, MPA_KEY_REPLY);
3636 memcpy(accept.addr + accept.size, conn_param->private_data,
3637 conn_param->private_data_len);
3639 /* setup our first outgoing iWarp send WQE (the IETF frame response) */
3640 if ((cm_node->ipv4 &&
3641 !i40iw_ipv4_is_loopback(cm_node->loc_addr[0], cm_node->rem_addr[0])) ||
3643 !i40iw_ipv6_is_loopback(cm_node->loc_addr, cm_node->rem_addr))) {
3645 tagged_offset = (uintptr_t)iwqp->ietf_mem.va;
3646 ibmr = i40iw_reg_phys_mr(&iwpd->ibpd,
3649 IB_ACCESS_LOCAL_WRITE,
3652 i40iw_free_dma_mem(dev->hw, &iwqp->ietf_mem);
3656 ibmr->pd = &iwpd->ibpd;
3657 ibmr->device = iwpd->ibpd.device;
3658 iwqp->lsmm_mr = ibmr;
3660 iwqp->sc_qp.qp_uk.sq_base = kmap(iwqp->page);
3661 dev->iw_priv_qp_ops->qp_send_lsmm(&iwqp->sc_qp,
3663 (accept.size + conn_param->private_data_len),
3668 iwqp->sc_qp.qp_uk.sq_base = kmap(iwqp->page);
3669 dev->iw_priv_qp_ops->qp_send_lsmm(&iwqp->sc_qp, NULL, 0, 0);
3675 iwqp->cm_id = cm_id;
3676 cm_node->cm_id = cm_id;
3678 cm_id->provider_data = (void *)iwqp;
3679 iwqp->active_conn = 0;
3681 cm_node->lsmm_size = accept.size + conn_param->private_data_len;
3682 i40iw_cm_init_tsa_conn(iwqp, cm_node);
3683 cm_id->add_ref(cm_id);
3684 i40iw_add_ref(&iwqp->ibqp);
3686 i40iw_send_cm_event(cm_node, cm_id, IW_CM_EVENT_ESTABLISHED, 0);
3688 attr.qp_state = IB_QPS_RTS;
3689 cm_node->qhash_set = false;
3690 i40iw_modify_qp(&iwqp->ibqp, &attr, IB_QP_STATE, NULL);
3691 if (cm_node->loopbackpartner) {
3692 cm_node->loopbackpartner->pdata.size = conn_param->private_data_len;
3694 /* copy entire MPA frame to our cm_node's frame */
3695 memcpy(cm_node->loopbackpartner->pdata_buf,
3696 conn_param->private_data,
3697 conn_param->private_data_len);
3698 i40iw_create_event(cm_node->loopbackpartner, I40IW_CM_EVENT_CONNECTED);
3701 cm_node->accelerated = 1;
3702 if (cm_node->accept_pend) {
3703 atomic_dec(&cm_node->listener->pend_accepts_cnt);
3704 cm_node->accept_pend = 0;
3710 * i40iw_reject - registered call for connection to be rejected
3711 * @cm_id: cm information for passive connection
3712 * @pdata: private data to be sent
3713 * @pdata_len: private data length
3715 int i40iw_reject(struct iw_cm_id *cm_id, const void *pdata, u8 pdata_len)
3717 struct i40iw_device *iwdev;
3718 struct i40iw_cm_node *cm_node;
3719 struct i40iw_cm_node *loopback;
3721 cm_node = (struct i40iw_cm_node *)cm_id->provider_data;
3722 loopback = cm_node->loopbackpartner;
3723 cm_node->cm_id = cm_id;
3724 cm_node->pdata.size = pdata_len;
3726 iwdev = to_iwdev(cm_id->device);
3729 cm_node->cm_core->stats_rejects++;
3731 if (pdata_len + sizeof(struct ietf_mpa_v2) > MAX_CM_BUFFER)
3735 memcpy(&loopback->pdata_buf, pdata, pdata_len);
3736 loopback->pdata.size = pdata_len;
3739 return i40iw_cm_reject(cm_node, pdata, pdata_len);
3743 * i40iw_connect - registered call for connection to be established
3744 * @cm_id: cm information for passive connection
3745 * @conn_param: Information about the connection
3747 int i40iw_connect(struct iw_cm_id *cm_id, struct iw_cm_conn_param *conn_param)
3750 struct i40iw_qp *iwqp;
3751 struct i40iw_device *iwdev;
3752 struct i40iw_cm_node *cm_node;
3753 struct i40iw_cm_info cm_info;
3754 struct sockaddr_in *laddr;
3755 struct sockaddr_in *raddr;
3756 struct sockaddr_in6 *laddr6;
3757 struct sockaddr_in6 *raddr6;
3759 unsigned long flags;
3761 ibqp = i40iw_get_qp(cm_id->device, conn_param->qpn);
3764 iwqp = to_iwqp(ibqp);
3767 iwdev = to_iwdev(iwqp->ibqp.device);
3771 laddr = (struct sockaddr_in *)&cm_id->m_local_addr;
3772 raddr = (struct sockaddr_in *)&cm_id->m_remote_addr;
3773 laddr6 = (struct sockaddr_in6 *)&cm_id->m_local_addr;
3774 raddr6 = (struct sockaddr_in6 *)&cm_id->m_remote_addr;
3776 if (!(laddr->sin_port) || !(raddr->sin_port))
3779 iwqp->active_conn = 1;
3781 cm_id->provider_data = iwqp;
3783 /* set up the connection params for the node */
3784 if (cm_id->remote_addr.ss_family == AF_INET) {
3785 cm_info.ipv4 = true;
3786 memset(cm_info.loc_addr, 0, sizeof(cm_info.loc_addr));
3787 memset(cm_info.rem_addr, 0, sizeof(cm_info.rem_addr));
3788 cm_info.loc_addr[0] = ntohl(laddr->sin_addr.s_addr);
3789 cm_info.rem_addr[0] = ntohl(raddr->sin_addr.s_addr);
3790 cm_info.loc_port = ntohs(laddr->sin_port);
3791 cm_info.rem_port = ntohs(raddr->sin_port);
3792 cm_info.vlan_id = i40iw_get_vlan_ipv4(cm_info.loc_addr);
3794 cm_info.ipv4 = false;
3795 i40iw_copy_ip_ntohl(cm_info.loc_addr,
3796 laddr6->sin6_addr.in6_u.u6_addr32);
3797 i40iw_copy_ip_ntohl(cm_info.rem_addr,
3798 raddr6->sin6_addr.in6_u.u6_addr32);
3799 cm_info.loc_port = ntohs(laddr6->sin6_port);
3800 cm_info.rem_port = ntohs(raddr6->sin6_port);
3801 i40iw_netdev_vlan_ipv6(cm_info.loc_addr, &cm_info.vlan_id);
3803 cm_info.cm_id = cm_id;
3804 cm_info.tos = cm_id->tos;
3805 cm_info.user_pri = rt_tos2priority(cm_id->tos);
3806 i40iw_debug(&iwdev->sc_dev, I40IW_DEBUG_DCB, "%s TOS:[%d] UP:[%d]\n",
3807 __func__, cm_id->tos, cm_info.user_pri);
3808 cm_id->add_ref(cm_id);
3809 cm_node = i40iw_create_cm_node(&iwdev->cm_core, iwdev,
3810 conn_param->private_data_len,
3811 (void *)conn_param->private_data,
3814 if (IS_ERR(cm_node)) {
3815 ret = PTR_ERR(cm_node);
3816 cm_id->rem_ref(cm_id);
3820 if ((cm_info.ipv4 && (laddr->sin_addr.s_addr != raddr->sin_addr.s_addr)) ||
3821 (!cm_info.ipv4 && memcmp(laddr6->sin6_addr.in6_u.u6_addr32,
3822 raddr6->sin6_addr.in6_u.u6_addr32,
3823 sizeof(laddr6->sin6_addr.in6_u.u6_addr32)))) {
3824 if (i40iw_manage_qhash(iwdev, &cm_info, I40IW_QHASH_TYPE_TCP_ESTABLISHED,
3825 I40IW_QHASH_MANAGE_TYPE_ADD, NULL, true)) {
3829 cm_node->qhash_set = true;
3832 spin_lock_irqsave(&iwdev->cm_core.ht_lock, flags);
3833 if (!test_and_set_bit(cm_info.loc_port, iwdev->cm_core.active_side_ports)) {
3834 spin_unlock_irqrestore(&iwdev->cm_core.ht_lock, flags);
3835 if (i40iw_manage_apbvt(iwdev, cm_info.loc_port, I40IW_MANAGE_APBVT_ADD)) {
3840 spin_unlock_irqrestore(&iwdev->cm_core.ht_lock, flags);
3843 cm_node->apbvt_set = true;
3844 i40iw_record_ird_ord(cm_node, (u16)conn_param->ird, (u16)conn_param->ord);
3845 if (cm_node->send_rdma0_op == SEND_RDMA_READ_ZERO &&
3847 cm_node->ord_size = 1;
3849 iwqp->cm_node = cm_node;
3850 cm_node->iwqp = iwqp;
3851 iwqp->cm_id = cm_id;
3852 i40iw_add_ref(&iwqp->ibqp);
3854 if (cm_node->state != I40IW_CM_STATE_OFFLOADED) {
3855 cm_node->state = I40IW_CM_STATE_SYN_SENT;
3856 ret = i40iw_send_syn(cm_node, 0);
3861 i40iw_debug(cm_node->dev,
3863 "Api - connect(): port=0x%04x, cm_node=%p, cm_id = %p.\n",
3872 i40iw_debug(&iwdev->sc_dev,
3874 "Api - connect() FAILED: dest addr=%pI4",
3877 i40iw_debug(&iwdev->sc_dev,
3879 "Api - connect() FAILED: dest addr=%pI6",
3882 i40iw_rem_ref_cm_node(cm_node);
3883 cm_id->rem_ref(cm_id);
3884 iwdev->cm_core.stats_connect_errs++;
3889 * i40iw_create_listen - registered call creating listener
3890 * @cm_id: cm information for passive connection
3891 * @backlog: to max accept pending count
3893 int i40iw_create_listen(struct iw_cm_id *cm_id, int backlog)
3895 struct i40iw_device *iwdev;
3896 struct i40iw_cm_listener *cm_listen_node;
3897 struct i40iw_cm_info cm_info;
3898 enum i40iw_status_code ret;
3899 struct sockaddr_in *laddr;
3900 struct sockaddr_in6 *laddr6;
3901 bool wildcard = false;
3903 iwdev = to_iwdev(cm_id->device);
3907 laddr = (struct sockaddr_in *)&cm_id->m_local_addr;
3908 laddr6 = (struct sockaddr_in6 *)&cm_id->m_local_addr;
3909 memset(&cm_info, 0, sizeof(cm_info));
3910 if (laddr->sin_family == AF_INET) {
3911 cm_info.ipv4 = true;
3912 cm_info.loc_addr[0] = ntohl(laddr->sin_addr.s_addr);
3913 cm_info.loc_port = ntohs(laddr->sin_port);
3915 if (laddr->sin_addr.s_addr != INADDR_ANY)
3916 cm_info.vlan_id = i40iw_get_vlan_ipv4(cm_info.loc_addr);
3921 cm_info.ipv4 = false;
3922 i40iw_copy_ip_ntohl(cm_info.loc_addr,
3923 laddr6->sin6_addr.in6_u.u6_addr32);
3924 cm_info.loc_port = ntohs(laddr6->sin6_port);
3925 if (ipv6_addr_type(&laddr6->sin6_addr) != IPV6_ADDR_ANY)
3926 i40iw_netdev_vlan_ipv6(cm_info.loc_addr,
3931 cm_info.backlog = backlog;
3932 cm_info.cm_id = cm_id;
3934 cm_listen_node = i40iw_make_listen_node(&iwdev->cm_core, iwdev, &cm_info);
3935 if (!cm_listen_node) {
3936 i40iw_pr_err("cm_listen_node == NULL\n");
3940 cm_id->provider_data = cm_listen_node;
3942 cm_listen_node->tos = cm_id->tos;
3943 cm_listen_node->user_pri = rt_tos2priority(cm_id->tos);
3944 cm_info.user_pri = cm_listen_node->user_pri;
3946 if (!cm_listen_node->reused_node) {
3949 ret = i40iw_add_mqh_4(iwdev,
3953 ret = i40iw_add_mqh_6(iwdev,
3959 ret = i40iw_manage_apbvt(iwdev,
3961 I40IW_MANAGE_APBVT_ADD);
3966 ret = i40iw_manage_qhash(iwdev,
3968 I40IW_QHASH_TYPE_TCP_SYN,
3969 I40IW_QHASH_MANAGE_TYPE_ADD,
3974 cm_listen_node->qhash_set = true;
3975 ret = i40iw_manage_apbvt(iwdev,
3977 I40IW_MANAGE_APBVT_ADD);
3982 cm_id->add_ref(cm_id);
3983 cm_listen_node->cm_core->stats_listen_created++;
3986 i40iw_cm_del_listen(&iwdev->cm_core, (void *)cm_listen_node, false);
3991 * i40iw_destroy_listen - registered call to destroy listener
3992 * @cm_id: cm information for passive connection
3994 int i40iw_destroy_listen(struct iw_cm_id *cm_id)
3996 struct i40iw_device *iwdev;
3998 iwdev = to_iwdev(cm_id->device);
3999 if (cm_id->provider_data)
4000 i40iw_cm_del_listen(&iwdev->cm_core, cm_id->provider_data, true);
4002 i40iw_pr_err("cm_id->provider_data was NULL\n");
4004 cm_id->rem_ref(cm_id);
4010 * i40iw_cm_event_connected - handle connected active node
4011 * @event: the info for cm_node of connection
4013 static void i40iw_cm_event_connected(struct i40iw_cm_event *event)
4015 struct i40iw_qp *iwqp;
4016 struct i40iw_device *iwdev;
4017 struct i40iw_cm_node *cm_node;
4018 struct i40iw_sc_dev *dev;
4019 struct ib_qp_attr attr;
4020 struct iw_cm_id *cm_id;
4024 cm_node = event->cm_node;
4025 cm_id = cm_node->cm_id;
4026 iwqp = (struct i40iw_qp *)cm_id->provider_data;
4027 iwdev = to_iwdev(iwqp->ibqp.device);
4028 dev = &iwdev->sc_dev;
4030 if (iwqp->destroyed) {
4031 status = -ETIMEDOUT;
4034 i40iw_cm_init_tsa_conn(iwqp, cm_node);
4035 read0 = (cm_node->send_rdma0_op == SEND_RDMA_READ_ZERO);
4037 iwqp->sc_qp.qp_uk.sq_base = kmap(iwqp->page);
4038 dev->iw_priv_qp_ops->qp_send_rtt(&iwqp->sc_qp, read0);
4041 status = i40iw_send_cm_event(cm_node, cm_id, IW_CM_EVENT_CONNECT_REPLY, 0);
4043 i40iw_pr_err("send cm event\n");
4045 memset(&attr, 0, sizeof(attr));
4046 attr.qp_state = IB_QPS_RTS;
4047 cm_node->qhash_set = false;
4048 i40iw_modify_qp(&iwqp->ibqp, &attr, IB_QP_STATE, NULL);
4050 cm_node->accelerated = 1;
4056 cm_id->provider_data = NULL;
4057 i40iw_send_cm_event(event->cm_node,
4059 IW_CM_EVENT_CONNECT_REPLY,
4061 cm_id->rem_ref(cm_id);
4062 i40iw_rem_ref_cm_node(event->cm_node);
4066 * i40iw_cm_event_reset - handle reset
4067 * @event: the info for cm_node of connection
4069 static void i40iw_cm_event_reset(struct i40iw_cm_event *event)
4071 struct i40iw_cm_node *cm_node = event->cm_node;
4072 struct iw_cm_id *cm_id = cm_node->cm_id;
4073 struct i40iw_qp *iwqp;
4078 iwqp = cm_id->provider_data;
4082 i40iw_debug(cm_node->dev,
4084 "reset event %p - cm_id = %p\n",
4085 event->cm_node, cm_id);
4088 i40iw_send_cm_event(cm_node, cm_node->cm_id, IW_CM_EVENT_DISCONNECT, -ECONNRESET);
4089 i40iw_send_cm_event(cm_node, cm_node->cm_id, IW_CM_EVENT_CLOSE, 0);
4093 * i40iw_cm_event_handler - worker thread callback to send event to cm upper layer
4094 * @work: pointer of cm event info.
4096 static void i40iw_cm_event_handler(struct work_struct *work)
4098 struct i40iw_cm_event *event = container_of(work,
4099 struct i40iw_cm_event,
4101 struct i40iw_cm_node *cm_node;
4103 if (!event || !event->cm_node || !event->cm_node->cm_core)
4106 cm_node = event->cm_node;
4108 switch (event->type) {
4109 case I40IW_CM_EVENT_MPA_REQ:
4110 i40iw_send_cm_event(cm_node,
4112 IW_CM_EVENT_CONNECT_REQUEST,
4115 case I40IW_CM_EVENT_RESET:
4116 i40iw_cm_event_reset(event);
4118 case I40IW_CM_EVENT_CONNECTED:
4119 if (!event->cm_node->cm_id ||
4120 (event->cm_node->state != I40IW_CM_STATE_OFFLOADED))
4122 i40iw_cm_event_connected(event);
4124 case I40IW_CM_EVENT_MPA_REJECT:
4125 if (!event->cm_node->cm_id ||
4126 (cm_node->state == I40IW_CM_STATE_OFFLOADED))
4128 i40iw_send_cm_event(cm_node,
4130 IW_CM_EVENT_CONNECT_REPLY,
4133 case I40IW_CM_EVENT_ABORTED:
4134 if (!event->cm_node->cm_id ||
4135 (event->cm_node->state == I40IW_CM_STATE_OFFLOADED))
4137 i40iw_event_connect_error(event);
4140 i40iw_pr_err("event type = %d\n", event->type);
4144 event->cm_info.cm_id->rem_ref(event->cm_info.cm_id);
4145 i40iw_rem_ref_cm_node(event->cm_node);
4150 * i40iw_cm_post_event - queue event request for worker thread
4151 * @event: cm node's info for up event call
4153 static void i40iw_cm_post_event(struct i40iw_cm_event *event)
4155 atomic_inc(&event->cm_node->ref_count);
4156 event->cm_info.cm_id->add_ref(event->cm_info.cm_id);
4157 INIT_WORK(&event->event_work, i40iw_cm_event_handler);
4159 queue_work(event->cm_node->cm_core->event_wq, &event->event_work);
4163 * i40iw_qhash_ctrl - enable/disable qhash for list
4164 * @iwdev: device pointer
4165 * @parent_listen_node: parent listen node
4166 * @nfo: cm info node
4167 * @ipaddr: Pointer to IPv4 or IPv6 address
4168 * @ipv4: flag indicating IPv4 when true
4169 * @ifup: flag indicating interface up when true
4171 * Enables or disables the qhash for the node in the child
4172 * listen list that matches ipaddr. If no matching IP was found
4173 * it will allocate and add a new child listen node to the
4174 * parent listen node. The listen_list_lock is assumed to be
4177 static void i40iw_qhash_ctrl(struct i40iw_device *iwdev,
4178 struct i40iw_cm_listener *parent_listen_node,
4179 struct i40iw_cm_info *nfo,
4180 u32 *ipaddr, bool ipv4, bool ifup)
4182 struct list_head *child_listen_list = &parent_listen_node->child_listen_list;
4183 struct i40iw_cm_listener *child_listen_node;
4184 struct list_head *pos, *tpos;
4185 enum i40iw_status_code ret;
4186 bool node_allocated = false;
4187 enum i40iw_quad_hash_manage_type op =
4188 ifup ? I40IW_QHASH_MANAGE_TYPE_ADD : I40IW_QHASH_MANAGE_TYPE_DELETE;
4190 list_for_each_safe(pos, tpos, child_listen_list) {
4193 struct i40iw_cm_listener,
4195 if (!memcmp(child_listen_node->loc_addr, ipaddr, ipv4 ? 4 : 16))
4199 /* if not found then add a child listener if interface is going up */
4202 child_listen_node = kzalloc(sizeof(*child_listen_node), GFP_ATOMIC);
4203 if (!child_listen_node)
4205 node_allocated = true;
4206 memcpy(child_listen_node, parent_listen_node, sizeof(*child_listen_node));
4208 memcpy(child_listen_node->loc_addr, ipaddr, ipv4 ? 4 : 16);
4211 memcpy(nfo->loc_addr,
4212 child_listen_node->loc_addr,
4213 sizeof(nfo->loc_addr));
4214 nfo->vlan_id = child_listen_node->vlan_id;
4215 ret = i40iw_manage_qhash(iwdev, nfo,
4216 I40IW_QHASH_TYPE_TCP_SYN,
4220 child_listen_node->qhash_set = ifup;
4222 list_add(&child_listen_node->child_listen_list,
4223 &parent_listen_node->child_listen_list);
4224 } else if (node_allocated) {
4225 kfree(child_listen_node);
4230 * i40iw_cm_disconnect_all - disconnect all connected qp's
4231 * @iwdev: device pointer
4233 void i40iw_cm_disconnect_all(struct i40iw_device *iwdev)
4235 struct i40iw_cm_core *cm_core = &iwdev->cm_core;
4236 struct list_head *list_core_temp;
4237 struct list_head *list_node;
4238 struct i40iw_cm_node *cm_node;
4239 unsigned long flags;
4240 struct list_head connected_list;
4241 struct ib_qp_attr attr;
4243 INIT_LIST_HEAD(&connected_list);
4244 spin_lock_irqsave(&cm_core->ht_lock, flags);
4245 list_for_each_safe(list_node, list_core_temp, &cm_core->connected_nodes) {
4246 cm_node = container_of(list_node, struct i40iw_cm_node, list);
4247 atomic_inc(&cm_node->ref_count);
4248 list_add(&cm_node->connected_entry, &connected_list);
4250 spin_unlock_irqrestore(&cm_core->ht_lock, flags);
4252 list_for_each_safe(list_node, list_core_temp, &connected_list) {
4253 cm_node = container_of(list_node, struct i40iw_cm_node, connected_entry);
4254 attr.qp_state = IB_QPS_ERR;
4255 i40iw_modify_qp(&cm_node->iwqp->ibqp, &attr, IB_QP_STATE, NULL);
4257 i40iw_cm_disconn(cm_node->iwqp);
4258 i40iw_rem_ref_cm_node(cm_node);
4263 * i40iw_ifdown_notify - process an ifdown on an interface
4264 * @iwdev: device pointer
4265 * @ipaddr: Pointer to IPv4 or IPv6 address
4266 * @ipv4: flag indicating IPv4 when true
4267 * @ifup: flag indicating interface up when true
4269 void i40iw_if_notify(struct i40iw_device *iwdev, struct net_device *netdev,
4270 u32 *ipaddr, bool ipv4, bool ifup)
4272 struct i40iw_cm_core *cm_core = &iwdev->cm_core;
4273 unsigned long flags;
4274 struct i40iw_cm_listener *listen_node;
4275 static const u32 ip_zero[4] = { 0, 0, 0, 0 };
4276 struct i40iw_cm_info nfo;
4277 u16 vlan_id = rdma_vlan_dev_vlan_id(netdev);
4278 enum i40iw_status_code ret;
4279 enum i40iw_quad_hash_manage_type op =
4280 ifup ? I40IW_QHASH_MANAGE_TYPE_ADD : I40IW_QHASH_MANAGE_TYPE_DELETE;
4282 /* Disable or enable qhash for listeners */
4283 spin_lock_irqsave(&cm_core->listen_list_lock, flags);
4284 list_for_each_entry(listen_node, &cm_core->listen_nodes, list) {
4285 if (vlan_id == listen_node->vlan_id &&
4286 (!memcmp(listen_node->loc_addr, ipaddr, ipv4 ? 4 : 16) ||
4287 !memcmp(listen_node->loc_addr, ip_zero, ipv4 ? 4 : 16))) {
4288 memcpy(nfo.loc_addr, listen_node->loc_addr,
4289 sizeof(nfo.loc_addr));
4290 nfo.loc_port = listen_node->loc_port;
4291 nfo.ipv4 = listen_node->ipv4;
4292 nfo.vlan_id = listen_node->vlan_id;
4293 nfo.user_pri = listen_node->user_pri;
4294 if (!list_empty(&listen_node->child_listen_list)) {
4295 i40iw_qhash_ctrl(iwdev,
4298 ipaddr, ipv4, ifup);
4299 } else if (memcmp(listen_node->loc_addr, ip_zero,
4301 ret = i40iw_manage_qhash(iwdev,
4303 I40IW_QHASH_TYPE_TCP_SYN,
4308 listen_node->qhash_set = ifup;
4312 spin_unlock_irqrestore(&cm_core->listen_list_lock, flags);
4314 /* disconnect any connected qp's on ifdown */
4316 i40iw_cm_disconnect_all(iwdev);