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
72 * @buf: puda buffer to free
74 void i40iw_free_sqbuf(struct i40iw_sc_dev *dev, void *bufp)
76 struct i40iw_puda_buf *buf = (struct i40iw_puda_buf *)bufp;
77 struct i40iw_puda_rsrc *ilq = dev->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;
227 * i40iw_get_cmevent_info - for cm event upcall
228 * @cm_node: connection's node
229 * @cm_id: upper layers cm struct for the event
230 * @event: upper layer's cm event
232 static inline void i40iw_get_cmevent_info(struct i40iw_cm_node *cm_node,
233 struct iw_cm_id *cm_id,
234 struct iw_cm_event *event)
236 memcpy(&event->local_addr, &cm_id->m_local_addr,
237 sizeof(event->local_addr));
238 memcpy(&event->remote_addr, &cm_id->m_remote_addr,
239 sizeof(event->remote_addr));
241 event->private_data = (void *)cm_node->pdata_buf;
242 event->private_data_len = (u8)cm_node->pdata.size;
243 event->ird = cm_node->ird_size;
244 event->ord = cm_node->ord_size;
249 * i40iw_send_cm_event - upcall cm's event handler
250 * @cm_node: connection's node
251 * @cm_id: upper layer's cm info struct
252 * @type: Event type to indicate
253 * @status: status for the event type
255 static int i40iw_send_cm_event(struct i40iw_cm_node *cm_node,
256 struct iw_cm_id *cm_id,
257 enum iw_cm_event_type type,
260 struct iw_cm_event event;
262 memset(&event, 0, sizeof(event));
264 event.status = status;
266 case IW_CM_EVENT_CONNECT_REQUEST:
268 i40iw_fill_sockaddr4(cm_node, &event);
270 i40iw_fill_sockaddr6(cm_node, &event);
271 event.provider_data = (void *)cm_node;
272 event.private_data = (void *)cm_node->pdata_buf;
273 event.private_data_len = (u8)cm_node->pdata.size;
275 case IW_CM_EVENT_CONNECT_REPLY:
276 i40iw_get_cmevent_info(cm_node, cm_id, &event);
278 case IW_CM_EVENT_ESTABLISHED:
279 event.ird = cm_node->ird_size;
280 event.ord = cm_node->ord_size;
282 case IW_CM_EVENT_DISCONNECT:
284 case IW_CM_EVENT_CLOSE:
287 i40iw_pr_err("event type received type = %d\n", type);
290 return cm_id->event_handler(cm_id, &event);
294 * i40iw_create_event - create cm event
295 * @cm_node: connection's node
296 * @type: Event type to generate
298 static struct i40iw_cm_event *i40iw_create_event(struct i40iw_cm_node *cm_node,
299 enum i40iw_cm_event_type type)
301 struct i40iw_cm_event *event;
306 event = kzalloc(sizeof(*event), GFP_ATOMIC);
312 event->cm_node = cm_node;
313 memcpy(event->cm_info.rem_addr, cm_node->rem_addr, sizeof(event->cm_info.rem_addr));
314 memcpy(event->cm_info.loc_addr, cm_node->loc_addr, sizeof(event->cm_info.loc_addr));
315 event->cm_info.rem_port = cm_node->rem_port;
316 event->cm_info.loc_port = cm_node->loc_port;
317 event->cm_info.cm_id = cm_node->cm_id;
319 i40iw_debug(cm_node->dev,
321 "node=%p event=%p type=%u dst=%pI4 src=%pI4\n",
325 event->cm_info.loc_addr,
326 event->cm_info.rem_addr);
328 i40iw_cm_post_event(event);
333 * i40iw_free_retrans_entry - free send entry
334 * @cm_node: connection's node
336 static void i40iw_free_retrans_entry(struct i40iw_cm_node *cm_node)
338 struct i40iw_sc_dev *dev = cm_node->dev;
339 struct i40iw_timer_entry *send_entry;
341 send_entry = cm_node->send_entry;
343 cm_node->send_entry = NULL;
344 i40iw_free_sqbuf(dev, (void *)send_entry->sqbuf);
346 atomic_dec(&cm_node->ref_count);
351 * i40iw_cleanup_retrans_entry - free send entry with lock
352 * @cm_node: connection's node
354 static void i40iw_cleanup_retrans_entry(struct i40iw_cm_node *cm_node)
358 spin_lock_irqsave(&cm_node->retrans_list_lock, flags);
359 i40iw_free_retrans_entry(cm_node);
360 spin_unlock_irqrestore(&cm_node->retrans_list_lock, flags);
363 static bool is_remote_ne020_or_chelsio(struct i40iw_cm_node *cm_node)
365 if ((cm_node->rem_mac[0] == 0x0) &&
366 (((cm_node->rem_mac[1] == 0x12) && (cm_node->rem_mac[2] == 0x55)) ||
367 ((cm_node->rem_mac[1] == 0x07 && (cm_node->rem_mac[2] == 0x43)))))
373 * i40iw_form_cm_frame - get a free packet and build frame
374 * @cm_node: connection's node ionfo to use in frame
375 * @options: pointer to options info
376 * @hdr: pointer mpa header
377 * @pdata: pointer to private data
378 * @flags: indicates FIN or ACK
380 static struct i40iw_puda_buf *i40iw_form_cm_frame(struct i40iw_cm_node *cm_node,
381 struct i40iw_kmem_info *options,
382 struct i40iw_kmem_info *hdr,
383 struct i40iw_kmem_info *pdata,
386 struct i40iw_puda_buf *sqbuf;
387 struct i40iw_sc_dev *dev = cm_node->dev;
392 struct ipv6hdr *ip6h;
395 u16 eth_hlen = ETH_HLEN;
400 sqbuf = i40iw_puda_get_bufpool(dev->ilq);
406 opts_len = (u32)options->size;
412 pd_len = pdata->size;
413 if (!is_remote_ne020_or_chelsio(cm_node))
414 pd_len += MPA_ZERO_PAD_LEN;
417 if (cm_node->vlan_id < VLAN_TAG_PRESENT)
421 packetsize = sizeof(*iph) + sizeof(*tcph);
423 packetsize = sizeof(*ip6h) + sizeof(*tcph);
424 packetsize += opts_len + hdr_len + pd_len;
426 memset(buf, 0x00, eth_hlen + packetsize);
428 sqbuf->totallen = packetsize + eth_hlen;
429 sqbuf->maclen = eth_hlen;
430 sqbuf->tcphlen = sizeof(*tcph) + opts_len;
431 sqbuf->scratch = (void *)cm_node;
433 ethh = (struct ethhdr *)buf;
439 iph = (struct iphdr *)buf;
441 tcph = (struct tcphdr *)buf;
442 buf += sizeof(*tcph);
444 ether_addr_copy(ethh->h_dest, cm_node->rem_mac);
445 ether_addr_copy(ethh->h_source, cm_node->loc_mac);
446 if (cm_node->vlan_id < VLAN_TAG_PRESENT) {
447 ((struct vlan_ethhdr *)ethh)->h_vlan_proto = htons(ETH_P_8021Q);
448 ((struct vlan_ethhdr *)ethh)->h_vlan_TCI = htons(cm_node->vlan_id);
450 ((struct vlan_ethhdr *)ethh)->h_vlan_encapsulated_proto = htons(ETH_P_IP);
452 ethh->h_proto = htons(ETH_P_IP);
455 iph->version = IPVERSION;
456 iph->ihl = 5; /* 5 * 4Byte words, IP headr len */
458 iph->tot_len = htons(packetsize);
459 iph->id = htons(++cm_node->tcp_cntxt.loc_id);
461 iph->frag_off = htons(0x4000);
463 iph->protocol = IPPROTO_TCP;
464 iph->saddr = htonl(cm_node->loc_addr[0]);
465 iph->daddr = htonl(cm_node->rem_addr[0]);
468 ip6h = (struct ipv6hdr *)buf;
469 buf += sizeof(*ip6h);
470 tcph = (struct tcphdr *)buf;
471 buf += sizeof(*tcph);
473 ether_addr_copy(ethh->h_dest, cm_node->rem_mac);
474 ether_addr_copy(ethh->h_source, cm_node->loc_mac);
475 if (cm_node->vlan_id < VLAN_TAG_PRESENT) {
476 ((struct vlan_ethhdr *)ethh)->h_vlan_proto = htons(ETH_P_8021Q);
477 ((struct vlan_ethhdr *)ethh)->h_vlan_TCI = htons(cm_node->vlan_id);
478 ((struct vlan_ethhdr *)ethh)->h_vlan_encapsulated_proto = htons(ETH_P_IPV6);
480 ethh->h_proto = htons(ETH_P_IPV6);
483 ip6h->flow_lbl[0] = 0;
484 ip6h->flow_lbl[1] = 0;
485 ip6h->flow_lbl[2] = 0;
486 ip6h->payload_len = htons(packetsize - sizeof(*ip6h));
488 ip6h->hop_limit = 128;
489 i40iw_copy_ip_htonl(ip6h->saddr.in6_u.u6_addr32,
491 i40iw_copy_ip_htonl(ip6h->daddr.in6_u.u6_addr32,
495 tcph->source = htons(cm_node->loc_port);
496 tcph->dest = htons(cm_node->rem_port);
498 tcph->seq = htonl(cm_node->tcp_cntxt.loc_seq_num);
500 if (flags & SET_ACK) {
501 cm_node->tcp_cntxt.loc_ack_num = cm_node->tcp_cntxt.rcv_nxt;
502 tcph->ack_seq = htonl(cm_node->tcp_cntxt.loc_ack_num);
508 if (flags & SET_SYN) {
509 cm_node->tcp_cntxt.loc_seq_num++;
512 cm_node->tcp_cntxt.loc_seq_num += hdr_len + pd_len;
515 if (flags & SET_FIN) {
516 cm_node->tcp_cntxt.loc_seq_num++;
523 tcph->doff = (u16)((sizeof(*tcph) + opts_len + 3) >> 2);
524 sqbuf->tcphlen = tcph->doff << 2;
525 tcph->window = htons(cm_node->tcp_cntxt.rcv_wnd);
529 memcpy(buf, options->addr, opts_len);
534 memcpy(buf, hdr->addr, hdr_len);
539 memcpy(buf, pdata->addr, pd_len);
541 atomic_set(&sqbuf->refcount, 1);
547 * i40iw_send_reset - Send RST packet
548 * @cm_node: connection's node
550 static int i40iw_send_reset(struct i40iw_cm_node *cm_node)
552 struct i40iw_puda_buf *sqbuf;
553 int flags = SET_RST | SET_ACK;
555 sqbuf = i40iw_form_cm_frame(cm_node, NULL, NULL, NULL, flags);
557 i40iw_pr_err("no sqbuf\n");
561 return i40iw_schedule_cm_timer(cm_node, sqbuf, I40IW_TIMER_TYPE_SEND, 0, 1);
565 * i40iw_active_open_err - send event for active side cm error
566 * @cm_node: connection's node
567 * @reset: Flag to send reset or not
569 static void i40iw_active_open_err(struct i40iw_cm_node *cm_node, bool reset)
571 i40iw_cleanup_retrans_entry(cm_node);
572 cm_node->cm_core->stats_connect_errs++;
574 i40iw_debug(cm_node->dev,
576 "%s cm_node=%p state=%d\n",
580 atomic_inc(&cm_node->ref_count);
581 i40iw_send_reset(cm_node);
584 cm_node->state = I40IW_CM_STATE_CLOSED;
585 i40iw_create_event(cm_node, I40IW_CM_EVENT_ABORTED);
589 * i40iw_passive_open_err - handle passive side cm error
590 * @cm_node: connection's node
591 * @reset: send reset or just free cm_node
593 static void i40iw_passive_open_err(struct i40iw_cm_node *cm_node, bool reset)
595 i40iw_cleanup_retrans_entry(cm_node);
596 cm_node->cm_core->stats_passive_errs++;
597 cm_node->state = I40IW_CM_STATE_CLOSED;
598 i40iw_debug(cm_node->dev,
600 "%s cm_node=%p state =%d\n",
605 i40iw_send_reset(cm_node);
607 i40iw_rem_ref_cm_node(cm_node);
611 * i40iw_event_connect_error - to create connect error event
612 * @event: cm information for connect event
614 static void i40iw_event_connect_error(struct i40iw_cm_event *event)
616 struct i40iw_qp *iwqp;
617 struct iw_cm_id *cm_id;
619 cm_id = event->cm_node->cm_id;
623 iwqp = cm_id->provider_data;
625 if (!iwqp || !iwqp->iwdev)
629 cm_id->provider_data = NULL;
630 i40iw_send_cm_event(event->cm_node, cm_id,
631 IW_CM_EVENT_CONNECT_REPLY,
633 cm_id->rem_ref(cm_id);
634 i40iw_rem_ref_cm_node(event->cm_node);
638 * i40iw_process_options
639 * @cm_node: connection's node
640 * @optionsloc: point to start of options
641 * @optionsize: size of all options
642 * @syn_packet: flag if syn packet
644 static int i40iw_process_options(struct i40iw_cm_node *cm_node,
651 union all_known_options *all_options;
652 char got_mss_option = 0;
654 while (offset < optionsize) {
655 all_options = (union all_known_options *)(optionsloc + offset);
656 switch (all_options->as_base.optionnum) {
657 case OPTION_NUMBER_END:
660 case OPTION_NUMBER_NONE:
663 case OPTION_NUMBER_MSS:
664 i40iw_debug(cm_node->dev,
666 "%s: MSS Length: %d Offset: %d Size: %d\n",
668 all_options->as_mss.length,
672 if (all_options->as_mss.length != 4)
674 tmp = ntohs(all_options->as_mss.mss);
675 if (tmp > 0 && tmp < cm_node->tcp_cntxt.mss)
676 cm_node->tcp_cntxt.mss = tmp;
678 case OPTION_NUMBER_WINDOW_SCALE:
679 cm_node->tcp_cntxt.snd_wscale =
680 all_options->as_windowscale.shiftcount;
683 i40iw_debug(cm_node->dev,
685 "TCP Option not understood: %x\n",
686 all_options->as_base.optionnum);
689 offset += all_options->as_base.length;
691 if (!got_mss_option && syn_packet)
692 cm_node->tcp_cntxt.mss = I40IW_CM_DEFAULT_MSS;
697 * i40iw_handle_tcp_options -
698 * @cm_node: connection's node
699 * @tcph: pointer tcp header
700 * @optionsize: size of options rcvd
701 * @passive: active or passive flag
703 static int i40iw_handle_tcp_options(struct i40iw_cm_node *cm_node,
708 u8 *optionsloc = (u8 *)&tcph[1];
711 if (i40iw_process_options(cm_node,
715 i40iw_debug(cm_node->dev,
717 "%s: Node %p, Sending RESET\n",
721 i40iw_passive_open_err(cm_node, true);
723 i40iw_active_open_err(cm_node, true);
728 cm_node->tcp_cntxt.snd_wnd = ntohs(tcph->window) <<
729 cm_node->tcp_cntxt.snd_wscale;
731 if (cm_node->tcp_cntxt.snd_wnd > cm_node->tcp_cntxt.max_snd_wnd)
732 cm_node->tcp_cntxt.max_snd_wnd = cm_node->tcp_cntxt.snd_wnd;
737 * i40iw_build_mpa_v1 - build a MPA V1 frame
738 * @cm_node: connection's node
739 * @mpa_key: to do read0 or write0
741 static void i40iw_build_mpa_v1(struct i40iw_cm_node *cm_node,
745 struct ietf_mpa_v1 *mpa_frame = (struct ietf_mpa_v1 *)start_addr;
748 case MPA_KEY_REQUEST:
749 memcpy(mpa_frame->key, IEFT_MPA_KEY_REQ, IETF_MPA_KEY_SIZE);
752 memcpy(mpa_frame->key, IEFT_MPA_KEY_REP, IETF_MPA_KEY_SIZE);
757 mpa_frame->flags = IETF_MPA_FLAGS_CRC;
758 mpa_frame->rev = cm_node->mpa_frame_rev;
759 mpa_frame->priv_data_len = htons(cm_node->pdata.size);
763 * i40iw_build_mpa_v2 - build a MPA V2 frame
764 * @cm_node: connection's node
765 * @start_addr: buffer start address
766 * @mpa_key: to do read0 or write0
768 static void i40iw_build_mpa_v2(struct i40iw_cm_node *cm_node,
772 struct ietf_mpa_v2 *mpa_frame = (struct ietf_mpa_v2 *)start_addr;
773 struct ietf_rtr_msg *rtr_msg = &mpa_frame->rtr_msg;
775 /* initialize the upper 5 bytes of the frame */
776 i40iw_build_mpa_v1(cm_node, start_addr, mpa_key);
777 mpa_frame->flags |= IETF_MPA_V2_FLAG;
778 mpa_frame->priv_data_len += htons(IETF_RTR_MSG_SIZE);
780 /* initialize RTR msg */
781 if (cm_node->mpav2_ird_ord == IETF_NO_IRD_ORD) {
782 rtr_msg->ctrl_ird = IETF_NO_IRD_ORD;
783 rtr_msg->ctrl_ord = IETF_NO_IRD_ORD;
785 rtr_msg->ctrl_ird = (cm_node->ird_size > IETF_NO_IRD_ORD) ?
786 IETF_NO_IRD_ORD : cm_node->ird_size;
787 rtr_msg->ctrl_ord = (cm_node->ord_size > IETF_NO_IRD_ORD) ?
788 IETF_NO_IRD_ORD : cm_node->ord_size;
791 rtr_msg->ctrl_ird |= IETF_PEER_TO_PEER;
792 rtr_msg->ctrl_ird |= IETF_FLPDU_ZERO_LEN;
795 case MPA_KEY_REQUEST:
796 rtr_msg->ctrl_ord |= IETF_RDMA0_WRITE;
797 rtr_msg->ctrl_ord |= IETF_RDMA0_READ;
800 switch (cm_node->send_rdma0_op) {
801 case SEND_RDMA_WRITE_ZERO:
802 rtr_msg->ctrl_ord |= IETF_RDMA0_WRITE;
804 case SEND_RDMA_READ_ZERO:
805 rtr_msg->ctrl_ord |= IETF_RDMA0_READ;
812 rtr_msg->ctrl_ird = htons(rtr_msg->ctrl_ird);
813 rtr_msg->ctrl_ord = htons(rtr_msg->ctrl_ord);
817 * i40iw_cm_build_mpa_frame - build mpa frame for mpa version 1 or version 2
818 * @cm_node: connection's node
819 * @mpa: mpa: data buffer
820 * @mpa_key: to do read0 or write0
822 static int i40iw_cm_build_mpa_frame(struct i40iw_cm_node *cm_node,
823 struct i40iw_kmem_info *mpa,
828 switch (cm_node->mpa_frame_rev) {
830 hdr_len = sizeof(struct ietf_mpa_v1);
831 i40iw_build_mpa_v1(cm_node, mpa->addr, mpa_key);
834 hdr_len = sizeof(struct ietf_mpa_v2);
835 i40iw_build_mpa_v2(cm_node, mpa->addr, mpa_key);
845 * i40iw_send_mpa_request - active node send mpa request to passive node
846 * @cm_node: connection's node
848 static int i40iw_send_mpa_request(struct i40iw_cm_node *cm_node)
850 struct i40iw_puda_buf *sqbuf;
853 i40iw_pr_err("cm_node == NULL\n");
857 cm_node->mpa_hdr.addr = &cm_node->mpa_frame;
858 cm_node->mpa_hdr.size = i40iw_cm_build_mpa_frame(cm_node,
861 if (!cm_node->mpa_hdr.size) {
862 i40iw_pr_err("mpa size = %d\n", cm_node->mpa_hdr.size);
866 sqbuf = i40iw_form_cm_frame(cm_node,
872 i40iw_pr_err("sq_buf == NULL\n");
875 return i40iw_schedule_cm_timer(cm_node, sqbuf, I40IW_TIMER_TYPE_SEND, 1, 0);
879 * i40iw_send_mpa_reject -
880 * @cm_node: connection's node
881 * @pdata: reject data for connection
882 * @plen: length of reject data
884 static int i40iw_send_mpa_reject(struct i40iw_cm_node *cm_node,
888 struct i40iw_puda_buf *sqbuf;
889 struct i40iw_kmem_info priv_info;
891 cm_node->mpa_hdr.addr = &cm_node->mpa_frame;
892 cm_node->mpa_hdr.size = i40iw_cm_build_mpa_frame(cm_node,
896 cm_node->mpa_frame.flags |= IETF_MPA_FLAGS_REJECT;
897 priv_info.addr = (void *)pdata;
898 priv_info.size = plen;
900 sqbuf = i40iw_form_cm_frame(cm_node,
906 i40iw_pr_err("no sqbuf\n");
909 cm_node->state = I40IW_CM_STATE_FIN_WAIT1;
910 return i40iw_schedule_cm_timer(cm_node, sqbuf, I40IW_TIMER_TYPE_SEND, 1, 0);
914 * recv_mpa - process an IETF MPA frame
915 * @cm_node: connection's node
916 * @buffer: Data pointer
917 * @type: to return accept or reject
918 * @len: Len of mpa buffer
920 static int i40iw_parse_mpa(struct i40iw_cm_node *cm_node, u8 *buffer, u32 *type, u32 len)
922 struct ietf_mpa_v1 *mpa_frame;
923 struct ietf_mpa_v2 *mpa_v2_frame;
924 struct ietf_rtr_msg *rtr_msg;
928 *type = I40IW_MPA_REQUEST_ACCEPT;
930 if (len < sizeof(struct ietf_mpa_v1)) {
931 i40iw_pr_err("ietf buffer small (%x)\n", len);
935 mpa_frame = (struct ietf_mpa_v1 *)buffer;
936 mpa_hdr_len = sizeof(struct ietf_mpa_v1);
937 priv_data_len = ntohs(mpa_frame->priv_data_len);
939 if (priv_data_len > IETF_MAX_PRIV_DATA_LEN) {
940 i40iw_pr_err("large pri_data %d\n", priv_data_len);
943 if (mpa_frame->rev != IETF_MPA_V1 && mpa_frame->rev != IETF_MPA_V2) {
944 i40iw_pr_err("unsupported mpa rev = %d\n", mpa_frame->rev);
947 if (mpa_frame->rev > cm_node->mpa_frame_rev) {
948 i40iw_pr_err("rev %d\n", mpa_frame->rev);
951 cm_node->mpa_frame_rev = mpa_frame->rev;
953 if (cm_node->state != I40IW_CM_STATE_MPAREQ_SENT) {
954 if (memcmp(mpa_frame->key, IEFT_MPA_KEY_REQ, IETF_MPA_KEY_SIZE)) {
955 i40iw_pr_err("Unexpected MPA Key received\n");
959 if (memcmp(mpa_frame->key, IEFT_MPA_KEY_REP, IETF_MPA_KEY_SIZE)) {
960 i40iw_pr_err("Unexpected MPA Key received\n");
965 if (priv_data_len + mpa_hdr_len > len) {
966 i40iw_pr_err("ietf buffer len(%x + %x != %x)\n",
967 priv_data_len, mpa_hdr_len, len);
970 if (len > MAX_CM_BUFFER) {
971 i40iw_pr_err("ietf buffer large len = %d\n", len);
975 switch (mpa_frame->rev) {
982 mpa_v2_frame = (struct ietf_mpa_v2 *)buffer;
983 mpa_hdr_len += IETF_RTR_MSG_SIZE;
984 rtr_msg = &mpa_v2_frame->rtr_msg;
986 /* parse rtr message */
987 ctrl_ord = ntohs(rtr_msg->ctrl_ord);
988 ctrl_ird = ntohs(rtr_msg->ctrl_ird);
989 ird_size = ctrl_ird & IETF_NO_IRD_ORD;
990 ord_size = ctrl_ord & IETF_NO_IRD_ORD;
992 if (!(ctrl_ird & IETF_PEER_TO_PEER))
995 if (ird_size == IETF_NO_IRD_ORD || ord_size == IETF_NO_IRD_ORD) {
996 cm_node->mpav2_ird_ord = IETF_NO_IRD_ORD;
1000 if (cm_node->state != I40IW_CM_STATE_MPAREQ_SENT) {
1002 if (!ord_size && (ctrl_ord & IETF_RDMA0_READ))
1003 cm_node->ird_size = 1;
1004 if (cm_node->ord_size > ird_size)
1005 cm_node->ord_size = ird_size;
1008 if (!ird_size && (ctrl_ord & IETF_RDMA0_READ))
1010 if (cm_node->ord_size > ird_size)
1011 cm_node->ord_size = ird_size;
1013 if (cm_node->ird_size < ord_size)
1014 /* no resources available */
1019 if (ctrl_ord & IETF_RDMA0_READ)
1020 cm_node->send_rdma0_op = SEND_RDMA_READ_ZERO;
1021 else if (ctrl_ord & IETF_RDMA0_WRITE)
1022 cm_node->send_rdma0_op = SEND_RDMA_WRITE_ZERO;
1023 else /* Not supported RDMA0 operation */
1025 i40iw_debug(cm_node->dev, I40IW_DEBUG_CM,
1026 "MPAV2: Negotiated ORD: %d, IRD: %d\n",
1027 cm_node->ord_size, cm_node->ird_size);
1036 memcpy(cm_node->pdata_buf, buffer + mpa_hdr_len, priv_data_len);
1037 cm_node->pdata.size = priv_data_len;
1039 if (mpa_frame->flags & IETF_MPA_FLAGS_REJECT)
1040 *type = I40IW_MPA_REQUEST_REJECT;
1042 if (mpa_frame->flags & IETF_MPA_FLAGS_MARKERS)
1043 cm_node->snd_mark_en = true;
1049 * i40iw_schedule_cm_timer
1050 * @@cm_node: connection's node
1051 * @sqbuf: buffer to send
1052 * @type: if it es send ot close
1053 * @send_retrans: if rexmits to be done
1054 * @close_when_complete: is cm_node to be removed
1056 * note - cm_node needs to be protected before calling this. Encase in:
1057 * i40iw_rem_ref_cm_node(cm_core, cm_node);
1058 * i40iw_schedule_cm_timer(...)
1059 * atomic_inc(&cm_node->ref_count);
1061 int i40iw_schedule_cm_timer(struct i40iw_cm_node *cm_node,
1062 struct i40iw_puda_buf *sqbuf,
1063 enum i40iw_timer_type type,
1065 int close_when_complete)
1067 struct i40iw_sc_dev *dev = cm_node->dev;
1068 struct i40iw_cm_core *cm_core = cm_node->cm_core;
1069 struct i40iw_timer_entry *new_send;
1072 unsigned long flags;
1074 new_send = kzalloc(sizeof(*new_send), GFP_ATOMIC);
1076 i40iw_free_sqbuf(cm_node->dev, (void *)sqbuf);
1079 new_send->retrycount = I40IW_DEFAULT_RETRYS;
1080 new_send->retranscount = I40IW_DEFAULT_RETRANS;
1081 new_send->sqbuf = sqbuf;
1082 new_send->timetosend = jiffies;
1083 new_send->type = type;
1084 new_send->send_retrans = send_retrans;
1085 new_send->close_when_complete = close_when_complete;
1087 if (type == I40IW_TIMER_TYPE_CLOSE) {
1088 new_send->timetosend += (HZ / 10);
1089 if (cm_node->close_entry) {
1091 i40iw_free_sqbuf(cm_node->dev, (void *)sqbuf);
1092 i40iw_pr_err("already close entry\n");
1095 cm_node->close_entry = new_send;
1098 if (type == I40IW_TIMER_TYPE_SEND) {
1099 spin_lock_irqsave(&cm_node->retrans_list_lock, flags);
1100 cm_node->send_entry = new_send;
1101 atomic_inc(&cm_node->ref_count);
1102 spin_unlock_irqrestore(&cm_node->retrans_list_lock, flags);
1103 new_send->timetosend = jiffies + I40IW_RETRY_TIMEOUT;
1105 atomic_inc(&sqbuf->refcount);
1106 i40iw_puda_send_buf(dev->ilq, sqbuf);
1107 if (!send_retrans) {
1108 i40iw_cleanup_retrans_entry(cm_node);
1109 if (close_when_complete)
1110 i40iw_rem_ref_cm_node(cm_node);
1115 spin_lock_irqsave(&cm_core->ht_lock, flags);
1116 was_timer_set = timer_pending(&cm_core->tcp_timer);
1118 if (!was_timer_set) {
1119 cm_core->tcp_timer.expires = new_send->timetosend;
1120 add_timer(&cm_core->tcp_timer);
1122 spin_unlock_irqrestore(&cm_core->ht_lock, flags);
1128 * i40iw_retrans_expired - Could not rexmit the packet
1129 * @cm_node: connection's node
1131 static void i40iw_retrans_expired(struct i40iw_cm_node *cm_node)
1133 struct iw_cm_id *cm_id = cm_node->cm_id;
1134 enum i40iw_cm_node_state state = cm_node->state;
1136 cm_node->state = I40IW_CM_STATE_CLOSED;
1138 case I40IW_CM_STATE_SYN_RCVD:
1139 case I40IW_CM_STATE_CLOSING:
1140 i40iw_rem_ref_cm_node(cm_node);
1142 case I40IW_CM_STATE_FIN_WAIT1:
1143 case I40IW_CM_STATE_LAST_ACK:
1145 cm_id->rem_ref(cm_id);
1146 i40iw_send_reset(cm_node);
1149 atomic_inc(&cm_node->ref_count);
1150 i40iw_send_reset(cm_node);
1151 i40iw_create_event(cm_node, I40IW_CM_EVENT_ABORTED);
1157 * i40iw_handle_close_entry - for handling retry/timeouts
1158 * @cm_node: connection's node
1159 * @rem_node: flag for remove cm_node
1161 static void i40iw_handle_close_entry(struct i40iw_cm_node *cm_node, u32 rem_node)
1163 struct i40iw_timer_entry *close_entry = cm_node->close_entry;
1164 struct iw_cm_id *cm_id = cm_node->cm_id;
1165 struct i40iw_qp *iwqp;
1166 unsigned long flags;
1170 iwqp = (struct i40iw_qp *)close_entry->sqbuf;
1172 spin_lock_irqsave(&iwqp->lock, flags);
1174 iwqp->hw_tcp_state = I40IW_TCP_STATE_CLOSED;
1175 iwqp->hw_iwarp_state = I40IW_QP_STATE_ERROR;
1176 iwqp->last_aeq = I40IW_AE_RESET_SENT;
1177 iwqp->ibqp_state = IB_QPS_ERR;
1178 spin_unlock_irqrestore(&iwqp->lock, flags);
1179 i40iw_cm_disconn(iwqp);
1181 spin_unlock_irqrestore(&iwqp->lock, flags);
1183 } else if (rem_node) {
1184 /* TIME_WAIT state */
1185 i40iw_rem_ref_cm_node(cm_node);
1188 cm_id->rem_ref(cm_id);
1190 cm_node->close_entry = NULL;
1194 * i40iw_cm_timer_tick - system's timer expired callback
1195 * @pass: Pointing to cm_core
1197 static void i40iw_cm_timer_tick(unsigned long pass)
1199 unsigned long nexttimeout = jiffies + I40IW_LONG_TIME;
1200 struct i40iw_cm_node *cm_node;
1201 struct i40iw_timer_entry *send_entry, *close_entry;
1202 struct list_head *list_core_temp;
1203 struct list_head *list_node;
1204 struct i40iw_cm_core *cm_core = (struct i40iw_cm_core *)pass;
1206 unsigned long timetosend;
1207 struct i40iw_sc_dev *dev;
1208 unsigned long flags;
1210 struct list_head timer_list;
1212 INIT_LIST_HEAD(&timer_list);
1213 spin_lock_irqsave(&cm_core->ht_lock, flags);
1215 list_for_each_safe(list_node, list_core_temp, &cm_core->connected_nodes) {
1216 cm_node = container_of(list_node, struct i40iw_cm_node, list);
1217 if (cm_node->close_entry || cm_node->send_entry) {
1218 atomic_inc(&cm_node->ref_count);
1219 list_add(&cm_node->timer_entry, &timer_list);
1222 spin_unlock_irqrestore(&cm_core->ht_lock, flags);
1224 list_for_each_safe(list_node, list_core_temp, &timer_list) {
1225 cm_node = container_of(list_node,
1226 struct i40iw_cm_node,
1228 close_entry = cm_node->close_entry;
1231 if (time_after(close_entry->timetosend, jiffies)) {
1232 if (nexttimeout > close_entry->timetosend ||
1234 nexttimeout = close_entry->timetosend;
1238 i40iw_handle_close_entry(cm_node, 1);
1242 spin_lock_irqsave(&cm_node->retrans_list_lock, flags);
1244 send_entry = cm_node->send_entry;
1247 if (time_after(send_entry->timetosend, jiffies)) {
1248 if (cm_node->state != I40IW_CM_STATE_OFFLOADED) {
1249 if ((nexttimeout > send_entry->timetosend) ||
1251 nexttimeout = send_entry->timetosend;
1255 i40iw_free_retrans_entry(cm_node);
1260 if ((cm_node->state == I40IW_CM_STATE_OFFLOADED) ||
1261 (cm_node->state == I40IW_CM_STATE_CLOSED)) {
1262 i40iw_free_retrans_entry(cm_node);
1266 if (!send_entry->retranscount || !send_entry->retrycount) {
1267 i40iw_free_retrans_entry(cm_node);
1269 spin_unlock_irqrestore(&cm_node->retrans_list_lock, flags);
1270 i40iw_retrans_expired(cm_node);
1271 cm_node->state = I40IW_CM_STATE_CLOSED;
1272 spin_lock_irqsave(&cm_node->retrans_list_lock, flags);
1275 cm_node->cm_core->stats_pkt_retrans++;
1276 spin_unlock_irqrestore(&cm_node->retrans_list_lock, flags);
1279 atomic_inc(&send_entry->sqbuf->refcount);
1280 i40iw_puda_send_buf(dev->ilq, send_entry->sqbuf);
1281 spin_lock_irqsave(&cm_node->retrans_list_lock, flags);
1282 if (send_entry->send_retrans) {
1283 send_entry->retranscount--;
1284 timetosend = (I40IW_RETRY_TIMEOUT <<
1285 (I40IW_DEFAULT_RETRANS -
1286 send_entry->retranscount));
1288 send_entry->timetosend = jiffies +
1289 min(timetosend, I40IW_MAX_TIMEOUT);
1290 if (nexttimeout > send_entry->timetosend || !settimer) {
1291 nexttimeout = send_entry->timetosend;
1295 int close_when_complete;
1297 close_when_complete = send_entry->close_when_complete;
1298 i40iw_debug(cm_node->dev,
1300 "cm_node=%p state=%d\n",
1303 i40iw_free_retrans_entry(cm_node);
1304 if (close_when_complete)
1305 i40iw_rem_ref_cm_node(cm_node);
1308 spin_unlock_irqrestore(&cm_node->retrans_list_lock, flags);
1309 i40iw_rem_ref_cm_node(cm_node);
1313 spin_lock_irqsave(&cm_core->ht_lock, flags);
1314 if (!timer_pending(&cm_core->tcp_timer)) {
1315 cm_core->tcp_timer.expires = nexttimeout;
1316 add_timer(&cm_core->tcp_timer);
1318 spin_unlock_irqrestore(&cm_core->ht_lock, flags);
1323 * i40iw_send_syn - send SYN packet
1324 * @cm_node: connection's node
1325 * @sendack: flag to set ACK bit or not
1327 int i40iw_send_syn(struct i40iw_cm_node *cm_node, u32 sendack)
1329 struct i40iw_puda_buf *sqbuf;
1330 int flags = SET_SYN;
1331 char optionsbuffer[sizeof(struct option_mss) +
1332 sizeof(struct option_windowscale) +
1333 sizeof(struct option_base) + TCP_OPTIONS_PADDING];
1334 struct i40iw_kmem_info opts;
1336 int optionssize = 0;
1337 /* Sending MSS option */
1338 union all_known_options *options;
1340 opts.addr = optionsbuffer;
1342 i40iw_pr_err("no cm_node\n");
1346 options = (union all_known_options *)&optionsbuffer[optionssize];
1347 options->as_mss.optionnum = OPTION_NUMBER_MSS;
1348 options->as_mss.length = sizeof(struct option_mss);
1349 options->as_mss.mss = htons(cm_node->tcp_cntxt.mss);
1350 optionssize += sizeof(struct option_mss);
1352 options = (union all_known_options *)&optionsbuffer[optionssize];
1353 options->as_windowscale.optionnum = OPTION_NUMBER_WINDOW_SCALE;
1354 options->as_windowscale.length = sizeof(struct option_windowscale);
1355 options->as_windowscale.shiftcount = cm_node->tcp_cntxt.rcv_wscale;
1356 optionssize += sizeof(struct option_windowscale);
1357 options = (union all_known_options *)&optionsbuffer[optionssize];
1358 options->as_end = OPTION_NUMBER_END;
1364 opts.size = optionssize;
1366 sqbuf = i40iw_form_cm_frame(cm_node, &opts, NULL, NULL, flags);
1368 i40iw_pr_err("no sqbuf\n");
1371 return i40iw_schedule_cm_timer(cm_node, sqbuf, I40IW_TIMER_TYPE_SEND, 1, 0);
1375 * i40iw_send_ack - Send ACK packet
1376 * @cm_node: connection's node
1378 static void i40iw_send_ack(struct i40iw_cm_node *cm_node)
1380 struct i40iw_puda_buf *sqbuf;
1382 sqbuf = i40iw_form_cm_frame(cm_node, NULL, NULL, NULL, SET_ACK);
1384 i40iw_puda_send_buf(cm_node->dev->ilq, sqbuf);
1386 i40iw_pr_err("no sqbuf\n");
1390 * i40iw_send_fin - Send FIN pkt
1391 * @cm_node: connection's node
1393 static int i40iw_send_fin(struct i40iw_cm_node *cm_node)
1395 struct i40iw_puda_buf *sqbuf;
1397 sqbuf = i40iw_form_cm_frame(cm_node, NULL, NULL, NULL, SET_ACK | SET_FIN);
1399 i40iw_pr_err("no sqbuf\n");
1402 return i40iw_schedule_cm_timer(cm_node, sqbuf, I40IW_TIMER_TYPE_SEND, 1, 0);
1406 * i40iw_find_node - find a cm node that matches the reference cm node
1407 * @cm_core: cm's core
1408 * @rem_port: remote tcp port num
1409 * @rem_addr: remote ip addr
1410 * @loc_port: local tcp port num
1411 * @loc_addr: loc ip addr
1412 * @add_refcnt: flag to increment refcount of cm_node
1414 struct i40iw_cm_node *i40iw_find_node(struct i40iw_cm_core *cm_core,
1421 struct list_head *hte;
1422 struct i40iw_cm_node *cm_node;
1423 unsigned long flags;
1425 hte = &cm_core->connected_nodes;
1427 /* walk list and find cm_node associated with this session ID */
1428 spin_lock_irqsave(&cm_core->ht_lock, flags);
1429 list_for_each_entry(cm_node, hte, list) {
1430 if (!memcmp(cm_node->loc_addr, loc_addr, sizeof(cm_node->loc_addr)) &&
1431 (cm_node->loc_port == loc_port) &&
1432 !memcmp(cm_node->rem_addr, rem_addr, sizeof(cm_node->rem_addr)) &&
1433 (cm_node->rem_port == rem_port)) {
1435 atomic_inc(&cm_node->ref_count);
1436 spin_unlock_irqrestore(&cm_core->ht_lock, flags);
1440 spin_unlock_irqrestore(&cm_core->ht_lock, flags);
1447 * i40iw_find_listener - find a cm node listening on this addr-port pair
1448 * @cm_core: cm's core
1449 * @dst_port: listener tcp port num
1450 * @dst_addr: listener ip addr
1451 * @listener_state: state to match with listen node's
1453 static struct i40iw_cm_listener *i40iw_find_listener(
1454 struct i40iw_cm_core *cm_core,
1458 enum i40iw_cm_listener_state
1461 struct i40iw_cm_listener *listen_node;
1462 static const u32 ip_zero[4] = { 0, 0, 0, 0 };
1465 unsigned long flags;
1467 /* walk list and find cm_node associated with this session ID */
1468 spin_lock_irqsave(&cm_core->listen_list_lock, flags);
1469 list_for_each_entry(listen_node, &cm_core->listen_nodes, list) {
1470 memcpy(listen_addr, listen_node->loc_addr, sizeof(listen_addr));
1471 listen_port = listen_node->loc_port;
1472 /* compare node pair, return node handle if a match */
1473 if ((!memcmp(listen_addr, dst_addr, sizeof(listen_addr)) ||
1474 !memcmp(listen_addr, ip_zero, sizeof(listen_addr))) &&
1475 (listen_port == dst_port) &&
1476 (listener_state & listen_node->listener_state)) {
1477 atomic_inc(&listen_node->ref_count);
1478 spin_unlock_irqrestore(&cm_core->listen_list_lock, flags);
1482 spin_unlock_irqrestore(&cm_core->listen_list_lock, flags);
1487 * i40iw_add_hte_node - add a cm node to the hash table
1488 * @cm_core: cm's core
1489 * @cm_node: connection's node
1491 static void i40iw_add_hte_node(struct i40iw_cm_core *cm_core,
1492 struct i40iw_cm_node *cm_node)
1494 struct list_head *hte;
1495 unsigned long flags;
1497 if (!cm_node || !cm_core) {
1498 i40iw_pr_err("cm_node or cm_core == NULL\n");
1501 spin_lock_irqsave(&cm_core->ht_lock, flags);
1503 /* get a handle on the hash table element (list head for this slot) */
1504 hte = &cm_core->connected_nodes;
1505 list_add_tail(&cm_node->list, hte);
1506 spin_unlock_irqrestore(&cm_core->ht_lock, flags);
1510 * listen_port_in_use - determine if port is in use
1511 * @port: Listen port number
1513 static bool i40iw_listen_port_in_use(struct i40iw_cm_core *cm_core, u16 port)
1515 struct i40iw_cm_listener *listen_node;
1516 unsigned long flags;
1519 spin_lock_irqsave(&cm_core->listen_list_lock, flags);
1520 list_for_each_entry(listen_node, &cm_core->listen_nodes, list) {
1521 if (listen_node->loc_port == port) {
1526 spin_unlock_irqrestore(&cm_core->listen_list_lock, flags);
1531 * i40iw_del_multiple_qhash - Remove qhash and child listens
1532 * @iwdev: iWarp device
1533 * @cm_info: CM info for parent listen node
1534 * @cm_parent_listen_node: The parent listen node
1536 static enum i40iw_status_code i40iw_del_multiple_qhash(
1537 struct i40iw_device *iwdev,
1538 struct i40iw_cm_info *cm_info,
1539 struct i40iw_cm_listener *cm_parent_listen_node)
1541 struct i40iw_cm_listener *child_listen_node;
1542 enum i40iw_status_code ret = I40IW_ERR_CONFIG;
1543 struct list_head *pos, *tpos;
1544 unsigned long flags;
1546 spin_lock_irqsave(&iwdev->cm_core.listen_list_lock, flags);
1547 list_for_each_safe(pos, tpos, &cm_parent_listen_node->child_listen_list) {
1548 child_listen_node = list_entry(pos, struct i40iw_cm_listener, child_listen_list);
1549 if (child_listen_node->ipv4)
1550 i40iw_debug(&iwdev->sc_dev,
1552 "removing child listen for IP=%pI4, port=%d, vlan=%d\n",
1553 child_listen_node->loc_addr,
1554 child_listen_node->loc_port,
1555 child_listen_node->vlan_id);
1557 i40iw_debug(&iwdev->sc_dev, I40IW_DEBUG_CM,
1558 "removing child listen for IP=%pI6, port=%d, vlan=%d\n",
1559 child_listen_node->loc_addr,
1560 child_listen_node->loc_port,
1561 child_listen_node->vlan_id);
1563 memcpy(cm_info->loc_addr, child_listen_node->loc_addr,
1564 sizeof(cm_info->loc_addr));
1565 cm_info->vlan_id = child_listen_node->vlan_id;
1566 ret = i40iw_manage_qhash(iwdev, cm_info,
1567 I40IW_QHASH_TYPE_TCP_SYN,
1568 I40IW_QHASH_MANAGE_TYPE_DELETE, NULL, false);
1569 kfree(child_listen_node);
1570 cm_parent_listen_node->cm_core->stats_listen_nodes_destroyed++;
1571 i40iw_debug(&iwdev->sc_dev,
1573 "freed pointer = %p\n",
1576 spin_unlock_irqrestore(&iwdev->cm_core.listen_list_lock, flags);
1582 * i40iw_netdev_vlan_ipv6 - Gets the netdev and mac
1583 * @addr: local IPv6 address
1584 * @vlan_id: vlan id for the given IPv6 address
1585 * @mac: mac address for the given IPv6 address
1587 * Returns the net_device of the IPv6 address and also sets the
1588 * vlan id and mac for that address.
1590 static struct net_device *i40iw_netdev_vlan_ipv6(u32 *addr, u16 *vlan_id, u8 *mac)
1592 struct net_device *ip_dev = NULL;
1593 #if IS_ENABLED(CONFIG_IPV6)
1594 struct in6_addr laddr6;
1596 i40iw_copy_ip_htonl(laddr6.in6_u.u6_addr32, addr);
1598 *vlan_id = I40IW_NO_VLAN;
1602 for_each_netdev_rcu(&init_net, ip_dev) {
1603 if (ipv6_chk_addr(&init_net, &laddr6, ip_dev, 1)) {
1605 *vlan_id = rdma_vlan_dev_vlan_id(ip_dev);
1606 if (ip_dev->dev_addr && mac)
1607 ether_addr_copy(mac, ip_dev->dev_addr);
1617 * i40iw_get_vlan_ipv4 - Returns the vlan_id for IPv4 address
1618 * @addr: local IPv4 address
1620 static u16 i40iw_get_vlan_ipv4(u32 *addr)
1622 struct net_device *netdev;
1623 u16 vlan_id = I40IW_NO_VLAN;
1625 netdev = ip_dev_find(&init_net, htonl(addr[0]));
1627 vlan_id = rdma_vlan_dev_vlan_id(netdev);
1634 * i40iw_add_mqh_6 - Adds multiple qhashes for IPv6
1635 * @iwdev: iWarp device
1636 * @cm_info: CM info for parent listen node
1637 * @cm_parent_listen_node: The parent listen node
1639 * Adds a qhash and a child listen node for every IPv6 address
1640 * on the adapter and adds the associated qhash filter
1642 static enum i40iw_status_code i40iw_add_mqh_6(struct i40iw_device *iwdev,
1643 struct i40iw_cm_info *cm_info,
1644 struct i40iw_cm_listener *cm_parent_listen_node)
1646 struct net_device *ip_dev;
1647 struct inet6_dev *idev;
1648 struct inet6_ifaddr *ifp;
1649 enum i40iw_status_code ret = 0;
1650 struct i40iw_cm_listener *child_listen_node;
1651 unsigned long flags;
1654 for_each_netdev_rcu(&init_net, ip_dev) {
1655 if ((((rdma_vlan_dev_vlan_id(ip_dev) < I40IW_NO_VLAN) &&
1656 (rdma_vlan_dev_real_dev(ip_dev) == iwdev->netdev)) ||
1657 (ip_dev == iwdev->netdev)) && (ip_dev->flags & IFF_UP)) {
1658 idev = __in6_dev_get(ip_dev);
1660 i40iw_pr_err("idev == NULL\n");
1663 list_for_each_entry(ifp, &idev->addr_list, if_list) {
1664 i40iw_debug(&iwdev->sc_dev,
1666 "IP=%pI6, vlan_id=%d, MAC=%pM\n",
1668 rdma_vlan_dev_vlan_id(ip_dev),
1671 kzalloc(sizeof(*child_listen_node), GFP_ATOMIC);
1672 i40iw_debug(&iwdev->sc_dev,
1674 "Allocating child listener %p\n",
1676 if (!child_listen_node) {
1677 i40iw_pr_err("listener memory allocation\n");
1678 ret = I40IW_ERR_NO_MEMORY;
1681 cm_info->vlan_id = rdma_vlan_dev_vlan_id(ip_dev);
1682 cm_parent_listen_node->vlan_id = cm_info->vlan_id;
1684 memcpy(child_listen_node, cm_parent_listen_node,
1685 sizeof(*child_listen_node));
1687 i40iw_copy_ip_ntohl(child_listen_node->loc_addr,
1688 ifp->addr.in6_u.u6_addr32);
1689 memcpy(cm_info->loc_addr, child_listen_node->loc_addr,
1690 sizeof(cm_info->loc_addr));
1692 ret = i40iw_manage_qhash(iwdev, cm_info,
1693 I40IW_QHASH_TYPE_TCP_SYN,
1694 I40IW_QHASH_MANAGE_TYPE_ADD,
1697 spin_lock_irqsave(&iwdev->cm_core.listen_list_lock, flags);
1698 list_add(&child_listen_node->child_listen_list,
1699 &cm_parent_listen_node->child_listen_list);
1700 spin_unlock_irqrestore(&iwdev->cm_core.listen_list_lock, flags);
1701 cm_parent_listen_node->cm_core->stats_listen_nodes_created++;
1703 kfree(child_listen_node);
1714 * i40iw_add_mqh_4 - Adds multiple qhashes for IPv4
1715 * @iwdev: iWarp device
1716 * @cm_info: CM info for parent listen node
1717 * @cm_parent_listen_node: The parent listen node
1719 * Adds a qhash and a child listen node for every IPv4 address
1720 * on the adapter and adds the associated qhash filter
1722 static enum i40iw_status_code i40iw_add_mqh_4(
1723 struct i40iw_device *iwdev,
1724 struct i40iw_cm_info *cm_info,
1725 struct i40iw_cm_listener *cm_parent_listen_node)
1727 struct net_device *dev;
1728 struct in_device *idev;
1729 struct i40iw_cm_listener *child_listen_node;
1730 enum i40iw_status_code ret = 0;
1731 unsigned long flags;
1734 for_each_netdev(&init_net, dev) {
1735 if ((((rdma_vlan_dev_vlan_id(dev) < I40IW_NO_VLAN) &&
1736 (rdma_vlan_dev_real_dev(dev) == iwdev->netdev)) ||
1737 (dev == iwdev->netdev)) && (dev->flags & IFF_UP)) {
1738 idev = in_dev_get(dev);
1740 i40iw_debug(&iwdev->sc_dev,
1742 "Allocating child CM Listener forIP=%pI4, vlan_id=%d, MAC=%pM\n",
1744 rdma_vlan_dev_vlan_id(dev),
1746 child_listen_node = kzalloc(sizeof(*child_listen_node), GFP_ATOMIC);
1747 cm_parent_listen_node->cm_core->stats_listen_nodes_created++;
1748 i40iw_debug(&iwdev->sc_dev,
1750 "Allocating child listener %p\n",
1752 if (!child_listen_node) {
1753 i40iw_pr_err("listener memory allocation\n");
1755 ret = I40IW_ERR_NO_MEMORY;
1758 cm_info->vlan_id = rdma_vlan_dev_vlan_id(dev);
1759 cm_parent_listen_node->vlan_id = cm_info->vlan_id;
1760 memcpy(child_listen_node,
1761 cm_parent_listen_node,
1762 sizeof(*child_listen_node));
1764 child_listen_node->loc_addr[0] = ntohl(ifa->ifa_address);
1765 memcpy(cm_info->loc_addr, child_listen_node->loc_addr,
1766 sizeof(cm_info->loc_addr));
1768 ret = i40iw_manage_qhash(iwdev,
1770 I40IW_QHASH_TYPE_TCP_SYN,
1771 I40IW_QHASH_MANAGE_TYPE_ADD,
1775 spin_lock_irqsave(&iwdev->cm_core.listen_list_lock, flags);
1776 list_add(&child_listen_node->child_listen_list,
1777 &cm_parent_listen_node->child_listen_list);
1778 spin_unlock_irqrestore(&iwdev->cm_core.listen_list_lock, flags);
1780 kfree(child_listen_node);
1781 cm_parent_listen_node->cm_core->stats_listen_nodes_created--;
1794 * i40iw_dec_refcnt_listen - delete listener and associated cm nodes
1795 * @cm_core: cm's core
1796 * @free_hanging_nodes: to free associated cm_nodes
1797 * @apbvt_del: flag to delete the apbvt
1799 static int i40iw_dec_refcnt_listen(struct i40iw_cm_core *cm_core,
1800 struct i40iw_cm_listener *listener,
1801 int free_hanging_nodes, bool apbvt_del)
1805 struct list_head *list_pos;
1806 struct list_head *list_temp;
1807 struct i40iw_cm_node *cm_node;
1808 struct list_head reset_list;
1809 struct i40iw_cm_info nfo;
1810 struct i40iw_cm_node *loopback;
1811 enum i40iw_cm_node_state old_state;
1812 unsigned long flags;
1814 /* free non-accelerated child nodes for this listener */
1815 INIT_LIST_HEAD(&reset_list);
1816 if (free_hanging_nodes) {
1817 spin_lock_irqsave(&cm_core->ht_lock, flags);
1818 list_for_each_safe(list_pos, list_temp, &cm_core->connected_nodes) {
1819 cm_node = container_of(list_pos, struct i40iw_cm_node, list);
1820 if ((cm_node->listener == listener) && !cm_node->accelerated) {
1821 atomic_inc(&cm_node->ref_count);
1822 list_add(&cm_node->reset_entry, &reset_list);
1825 spin_unlock_irqrestore(&cm_core->ht_lock, flags);
1828 list_for_each_safe(list_pos, list_temp, &reset_list) {
1829 cm_node = container_of(list_pos, struct i40iw_cm_node, reset_entry);
1830 loopback = cm_node->loopbackpartner;
1831 if (cm_node->state >= I40IW_CM_STATE_FIN_WAIT1) {
1832 i40iw_rem_ref_cm_node(cm_node);
1835 i40iw_cleanup_retrans_entry(cm_node);
1836 err = i40iw_send_reset(cm_node);
1838 cm_node->state = I40IW_CM_STATE_CLOSED;
1839 i40iw_pr_err("send reset\n");
1841 old_state = cm_node->state;
1842 cm_node->state = I40IW_CM_STATE_LISTENER_DESTROYED;
1843 if (old_state != I40IW_CM_STATE_MPAREQ_RCVD)
1844 i40iw_rem_ref_cm_node(cm_node);
1847 struct i40iw_cm_event event;
1849 event.cm_node = loopback;
1850 memcpy(event.cm_info.rem_addr,
1851 loopback->rem_addr, sizeof(event.cm_info.rem_addr));
1852 memcpy(event.cm_info.loc_addr,
1853 loopback->loc_addr, sizeof(event.cm_info.loc_addr));
1854 event.cm_info.rem_port = loopback->rem_port;
1855 event.cm_info.loc_port = loopback->loc_port;
1856 event.cm_info.cm_id = loopback->cm_id;
1857 event.cm_info.ipv4 = loopback->ipv4;
1858 atomic_inc(&loopback->ref_count);
1859 loopback->state = I40IW_CM_STATE_CLOSED;
1860 i40iw_event_connect_error(&event);
1861 cm_node->state = I40IW_CM_STATE_LISTENER_DESTROYED;
1862 i40iw_rem_ref_cm_node(cm_node);
1867 if (!atomic_dec_return(&listener->ref_count)) {
1868 spin_lock_irqsave(&cm_core->listen_list_lock, flags);
1869 list_del(&listener->list);
1870 spin_unlock_irqrestore(&cm_core->listen_list_lock, flags);
1872 if (listener->iwdev) {
1873 if (apbvt_del && !i40iw_listen_port_in_use(cm_core, listener->loc_port))
1874 i40iw_manage_apbvt(listener->iwdev,
1876 I40IW_MANAGE_APBVT_DEL);
1878 memcpy(nfo.loc_addr, listener->loc_addr, sizeof(nfo.loc_addr));
1879 nfo.loc_port = listener->loc_port;
1880 nfo.ipv4 = listener->ipv4;
1881 nfo.vlan_id = listener->vlan_id;
1883 if (!list_empty(&listener->child_listen_list)) {
1884 i40iw_del_multiple_qhash(listener->iwdev, &nfo, listener);
1886 if (listener->qhash_set)
1887 i40iw_manage_qhash(listener->iwdev,
1889 I40IW_QHASH_TYPE_TCP_SYN,
1890 I40IW_QHASH_MANAGE_TYPE_DELETE,
1896 cm_core->stats_listen_destroyed++;
1898 cm_core->stats_listen_nodes_destroyed++;
1904 if (atomic_read(&listener->pend_accepts_cnt) > 0)
1905 i40iw_debug(cm_core->dev,
1907 "%s: listener (%p) pending accepts=%u\n",
1910 atomic_read(&listener->pend_accepts_cnt));
1917 * i40iw_cm_del_listen - delete a linstener
1918 * @cm_core: cm's core
1919 * @listener: passive connection's listener
1920 * @apbvt_del: flag to delete apbvt
1922 static int i40iw_cm_del_listen(struct i40iw_cm_core *cm_core,
1923 struct i40iw_cm_listener *listener,
1926 listener->listener_state = I40IW_CM_LISTENER_PASSIVE_STATE;
1927 listener->cm_id = NULL; /* going to be destroyed pretty soon */
1928 return i40iw_dec_refcnt_listen(cm_core, listener, 1, apbvt_del);
1932 * i40iw_addr_resolve_neigh - resolve neighbor address
1933 * @iwdev: iwarp device structure
1934 * @src_ip: local ip address
1935 * @dst_ip: remote ip address
1936 * @arpindex: if there is an arp entry
1938 static int i40iw_addr_resolve_neigh(struct i40iw_device *iwdev,
1944 struct neighbour *neigh;
1946 struct net_device *netdev = iwdev->netdev;
1947 __be32 dst_ipaddr = htonl(dst_ip);
1948 __be32 src_ipaddr = htonl(src_ip);
1950 rt = ip_route_output(&init_net, dst_ipaddr, src_ipaddr, 0, 0);
1952 i40iw_pr_err("ip_route_output\n");
1956 if (netif_is_bond_slave(netdev))
1957 netdev = netdev_master_upper_dev_get(netdev);
1959 neigh = dst_neigh_lookup(&rt->dst, &dst_ipaddr);
1963 if (neigh->nud_state & NUD_VALID) {
1964 if (arpindex >= 0) {
1965 if (ether_addr_equal(iwdev->arp_table[arpindex].mac_addr,
1967 /* Mac address same as arp table */
1968 goto resolve_neigh_exit;
1969 i40iw_manage_arp_cache(iwdev,
1970 iwdev->arp_table[arpindex].mac_addr,
1976 i40iw_manage_arp_cache(iwdev, neigh->ha, &dst_ip, true, I40IW_ARP_ADD);
1977 rc = i40iw_arp_table(iwdev, &dst_ip, true, NULL, I40IW_ARP_RESOLVE);
1979 neigh_event_send(neigh, NULL);
1986 neigh_release(neigh);
1993 * i40iw_get_dst_ipv6
1995 #if IS_ENABLED(CONFIG_IPV6)
1996 static struct dst_entry *i40iw_get_dst_ipv6(struct sockaddr_in6 *src_addr,
1997 struct sockaddr_in6 *dst_addr)
1999 struct dst_entry *dst;
2002 memset(&fl6, 0, sizeof(fl6));
2003 fl6.daddr = dst_addr->sin6_addr;
2004 fl6.saddr = src_addr->sin6_addr;
2005 if (ipv6_addr_type(&fl6.daddr) & IPV6_ADDR_LINKLOCAL)
2006 fl6.flowi6_oif = dst_addr->sin6_scope_id;
2008 dst = ip6_route_output(&init_net, NULL, &fl6);
2014 * i40iw_addr_resolve_neigh_ipv6 - resolve neighbor ipv6 address
2015 * @iwdev: iwarp device structure
2016 * @dst_ip: remote ip address
2017 * @arpindex: if there is an arp entry
2019 #if IS_ENABLED(CONFIG_IPV6)
2020 static int i40iw_addr_resolve_neigh_ipv6(struct i40iw_device *iwdev,
2025 struct neighbour *neigh;
2027 struct net_device *netdev = iwdev->netdev;
2028 struct dst_entry *dst;
2029 struct sockaddr_in6 dst_addr;
2030 struct sockaddr_in6 src_addr;
2032 memset(&dst_addr, 0, sizeof(dst_addr));
2033 dst_addr.sin6_family = AF_INET6;
2034 i40iw_copy_ip_htonl(dst_addr.sin6_addr.in6_u.u6_addr32, dest);
2035 memset(&src_addr, 0, sizeof(src_addr));
2036 src_addr.sin6_family = AF_INET6;
2037 i40iw_copy_ip_htonl(src_addr.sin6_addr.in6_u.u6_addr32, src);
2038 dst = i40iw_get_dst_ipv6(&src_addr, &dst_addr);
2039 if (!dst || dst->error) {
2042 i40iw_pr_err("ip6_route_output returned dst->error = %d\n",
2048 if (netif_is_bond_slave(netdev))
2049 netdev = netdev_master_upper_dev_get(netdev);
2051 neigh = dst_neigh_lookup(dst, &dst_addr);
2055 i40iw_debug(&iwdev->sc_dev, I40IW_DEBUG_CM, "dst_neigh_lookup MAC=%pM\n", neigh->ha);
2056 if (neigh->nud_state & NUD_VALID) {
2057 if (arpindex >= 0) {
2058 if (ether_addr_equal
2059 (iwdev->arp_table[arpindex].mac_addr,
2061 /* Mac address same as in arp table */
2062 goto resolve_neigh_exit6;
2064 i40iw_manage_arp_cache(iwdev,
2065 iwdev->arp_table[arpindex].mac_addr,
2070 i40iw_manage_arp_cache(iwdev,
2075 rc = i40iw_arp_table(iwdev,
2081 neigh_event_send(neigh, NULL);
2085 resolve_neigh_exit6:
2088 neigh_release(neigh);
2095 * i40iw_ipv4_is_loopback - check if loopback
2096 * @loc_addr: local addr to compare
2097 * @rem_addr: remote address
2099 static bool i40iw_ipv4_is_loopback(u32 loc_addr, u32 rem_addr)
2101 return ipv4_is_loopback(htonl(rem_addr)) || (loc_addr == rem_addr);
2105 * i40iw_ipv6_is_loopback - check if loopback
2106 * @loc_addr: local addr to compare
2107 * @rem_addr: remote address
2109 static bool i40iw_ipv6_is_loopback(u32 *loc_addr, u32 *rem_addr)
2111 struct in6_addr raddr6;
2113 i40iw_copy_ip_htonl(raddr6.in6_u.u6_addr32, rem_addr);
2114 return (!memcmp(loc_addr, rem_addr, 16) || ipv6_addr_loopback(&raddr6));
2118 * i40iw_make_cm_node - create a new instance of a cm node
2119 * @cm_core: cm's core
2120 * @iwdev: iwarp device structure
2121 * @cm_info: quad info for connection
2122 * @listener: passive connection's listener
2124 static struct i40iw_cm_node *i40iw_make_cm_node(
2125 struct i40iw_cm_core *cm_core,
2126 struct i40iw_device *iwdev,
2127 struct i40iw_cm_info *cm_info,
2128 struct i40iw_cm_listener *listener)
2130 struct i40iw_cm_node *cm_node;
2134 struct net_device *netdev = iwdev->netdev;
2136 /* create an hte and cm_node for this instance */
2137 cm_node = kzalloc(sizeof(*cm_node), GFP_ATOMIC);
2141 /* set our node specific transport info */
2142 cm_node->ipv4 = cm_info->ipv4;
2143 cm_node->vlan_id = cm_info->vlan_id;
2144 memcpy(cm_node->loc_addr, cm_info->loc_addr, sizeof(cm_node->loc_addr));
2145 memcpy(cm_node->rem_addr, cm_info->rem_addr, sizeof(cm_node->rem_addr));
2146 cm_node->loc_port = cm_info->loc_port;
2147 cm_node->rem_port = cm_info->rem_port;
2149 cm_node->mpa_frame_rev = iwdev->mpa_version;
2150 cm_node->send_rdma0_op = SEND_RDMA_READ_ZERO;
2151 cm_node->ird_size = I40IW_MAX_IRD_SIZE;
2152 cm_node->ord_size = I40IW_MAX_ORD_SIZE;
2154 cm_node->listener = listener;
2155 cm_node->cm_id = cm_info->cm_id;
2156 ether_addr_copy(cm_node->loc_mac, netdev->dev_addr);
2157 spin_lock_init(&cm_node->retrans_list_lock);
2159 atomic_set(&cm_node->ref_count, 1);
2160 /* associate our parent CM core */
2161 cm_node->cm_core = cm_core;
2162 cm_node->tcp_cntxt.loc_id = I40IW_CM_DEF_LOCAL_ID;
2163 cm_node->tcp_cntxt.rcv_wscale = I40IW_CM_DEFAULT_RCV_WND_SCALE;
2164 cm_node->tcp_cntxt.rcv_wnd =
2165 I40IW_CM_DEFAULT_RCV_WND_SCALED >> I40IW_CM_DEFAULT_RCV_WND_SCALE;
2166 ts = current_kernel_time();
2167 cm_node->tcp_cntxt.loc_seq_num = htonl(ts.tv_nsec);
2168 cm_node->tcp_cntxt.mss = iwdev->mss;
2170 cm_node->iwdev = iwdev;
2171 cm_node->dev = &iwdev->sc_dev;
2173 if ((cm_node->ipv4 &&
2174 i40iw_ipv4_is_loopback(cm_node->loc_addr[0], cm_node->rem_addr[0])) ||
2175 (!cm_node->ipv4 && i40iw_ipv6_is_loopback(cm_node->loc_addr,
2176 cm_node->rem_addr))) {
2177 arpindex = i40iw_arp_table(iwdev,
2183 oldarpindex = i40iw_arp_table(iwdev,
2189 arpindex = i40iw_addr_resolve_neigh(iwdev,
2190 cm_info->loc_addr[0],
2191 cm_info->rem_addr[0],
2193 #if IS_ENABLED(CONFIG_IPV6)
2195 arpindex = i40iw_addr_resolve_neigh_ipv6(iwdev,
2202 i40iw_pr_err("cm_node arpindex\n");
2206 ether_addr_copy(cm_node->rem_mac, iwdev->arp_table[arpindex].mac_addr);
2207 i40iw_add_hte_node(cm_core, cm_node);
2208 cm_core->stats_nodes_created++;
2213 * i40iw_rem_ref_cm_node - destroy an instance of a cm node
2214 * @cm_node: connection's node
2216 static void i40iw_rem_ref_cm_node(struct i40iw_cm_node *cm_node)
2218 struct i40iw_cm_core *cm_core = cm_node->cm_core;
2219 struct i40iw_qp *iwqp;
2220 struct i40iw_cm_info nfo;
2221 unsigned long flags;
2223 spin_lock_irqsave(&cm_node->cm_core->ht_lock, flags);
2224 if (atomic_dec_return(&cm_node->ref_count)) {
2225 spin_unlock_irqrestore(&cm_node->cm_core->ht_lock, flags);
2228 list_del(&cm_node->list);
2229 spin_unlock_irqrestore(&cm_node->cm_core->ht_lock, flags);
2231 /* if the node is destroyed before connection was accelerated */
2232 if (!cm_node->accelerated && cm_node->accept_pend) {
2233 pr_err("node destroyed before established\n");
2234 atomic_dec(&cm_node->listener->pend_accepts_cnt);
2236 if (cm_node->close_entry)
2237 i40iw_handle_close_entry(cm_node, 0);
2238 if (cm_node->listener) {
2239 i40iw_dec_refcnt_listen(cm_core, cm_node->listener, 0, true);
2241 if (!i40iw_listen_port_in_use(cm_core, htons(cm_node->loc_port)) &&
2242 cm_node->apbvt_set && cm_node->iwdev) {
2243 i40iw_manage_apbvt(cm_node->iwdev,
2245 I40IW_MANAGE_APBVT_DEL);
2246 i40iw_get_addr_info(cm_node, &nfo);
2247 if (cm_node->qhash_set) {
2248 i40iw_manage_qhash(cm_node->iwdev,
2250 I40IW_QHASH_TYPE_TCP_ESTABLISHED,
2251 I40IW_QHASH_MANAGE_TYPE_DELETE,
2254 cm_node->qhash_set = 0;
2259 iwqp = cm_node->iwqp;
2261 iwqp->cm_node = NULL;
2262 i40iw_rem_ref(&iwqp->ibqp);
2263 cm_node->iwqp = NULL;
2264 } else if (cm_node->qhash_set) {
2265 i40iw_get_addr_info(cm_node, &nfo);
2266 i40iw_manage_qhash(cm_node->iwdev,
2268 I40IW_QHASH_TYPE_TCP_ESTABLISHED,
2269 I40IW_QHASH_MANAGE_TYPE_DELETE,
2272 cm_node->qhash_set = 0;
2275 cm_node->cm_core->stats_nodes_destroyed++;
2280 * i40iw_handle_fin_pkt - FIN packet received
2281 * @cm_node: connection's node
2283 static void i40iw_handle_fin_pkt(struct i40iw_cm_node *cm_node)
2287 switch (cm_node->state) {
2288 case I40IW_CM_STATE_SYN_RCVD:
2289 case I40IW_CM_STATE_SYN_SENT:
2290 case I40IW_CM_STATE_ESTABLISHED:
2291 case I40IW_CM_STATE_MPAREJ_RCVD:
2292 cm_node->tcp_cntxt.rcv_nxt++;
2293 i40iw_cleanup_retrans_entry(cm_node);
2294 cm_node->state = I40IW_CM_STATE_LAST_ACK;
2295 i40iw_send_fin(cm_node);
2297 case I40IW_CM_STATE_MPAREQ_SENT:
2298 i40iw_create_event(cm_node, I40IW_CM_EVENT_ABORTED);
2299 cm_node->tcp_cntxt.rcv_nxt++;
2300 i40iw_cleanup_retrans_entry(cm_node);
2301 cm_node->state = I40IW_CM_STATE_CLOSED;
2302 atomic_inc(&cm_node->ref_count);
2303 i40iw_send_reset(cm_node);
2305 case I40IW_CM_STATE_FIN_WAIT1:
2306 cm_node->tcp_cntxt.rcv_nxt++;
2307 i40iw_cleanup_retrans_entry(cm_node);
2308 cm_node->state = I40IW_CM_STATE_CLOSING;
2309 i40iw_send_ack(cm_node);
2311 * Wait for ACK as this is simultaneous close.
2312 * After we receive ACK, do not send anything.
2316 case I40IW_CM_STATE_FIN_WAIT2:
2317 cm_node->tcp_cntxt.rcv_nxt++;
2318 i40iw_cleanup_retrans_entry(cm_node);
2319 cm_node->state = I40IW_CM_STATE_TIME_WAIT;
2320 i40iw_send_ack(cm_node);
2322 i40iw_schedule_cm_timer(cm_node, NULL, I40IW_TIMER_TYPE_CLOSE, 1, 0);
2324 i40iw_pr_err("node %p state = %d\n", cm_node, cm_node->state);
2326 case I40IW_CM_STATE_TIME_WAIT:
2327 cm_node->tcp_cntxt.rcv_nxt++;
2328 i40iw_cleanup_retrans_entry(cm_node);
2329 cm_node->state = I40IW_CM_STATE_CLOSED;
2330 i40iw_rem_ref_cm_node(cm_node);
2332 case I40IW_CM_STATE_OFFLOADED:
2334 i40iw_pr_err("bad state node %p state = %d\n", cm_node, cm_node->state);
2340 * i40iw_handle_rst_pkt - process received RST packet
2341 * @cm_node: connection's node
2342 * @rbuf: receive buffer
2344 static void i40iw_handle_rst_pkt(struct i40iw_cm_node *cm_node,
2345 struct i40iw_puda_buf *rbuf)
2347 i40iw_cleanup_retrans_entry(cm_node);
2348 switch (cm_node->state) {
2349 case I40IW_CM_STATE_SYN_SENT:
2350 case I40IW_CM_STATE_MPAREQ_SENT:
2351 switch (cm_node->mpa_frame_rev) {
2353 cm_node->mpa_frame_rev = IETF_MPA_V1;
2354 /* send a syn and goto syn sent state */
2355 cm_node->state = I40IW_CM_STATE_SYN_SENT;
2356 if (i40iw_send_syn(cm_node, 0))
2357 i40iw_active_open_err(cm_node, false);
2361 i40iw_active_open_err(cm_node, false);
2365 case I40IW_CM_STATE_MPAREQ_RCVD:
2366 atomic_add_return(1, &cm_node->passive_state);
2368 case I40IW_CM_STATE_ESTABLISHED:
2369 case I40IW_CM_STATE_SYN_RCVD:
2370 case I40IW_CM_STATE_LISTENING:
2371 i40iw_pr_err("Bad state state = %d\n", cm_node->state);
2372 i40iw_passive_open_err(cm_node, false);
2374 case I40IW_CM_STATE_OFFLOADED:
2375 i40iw_active_open_err(cm_node, false);
2377 case I40IW_CM_STATE_CLOSED:
2379 case I40IW_CM_STATE_FIN_WAIT2:
2380 case I40IW_CM_STATE_FIN_WAIT1:
2381 case I40IW_CM_STATE_LAST_ACK:
2382 cm_node->cm_id->rem_ref(cm_node->cm_id);
2383 case I40IW_CM_STATE_TIME_WAIT:
2384 cm_node->state = I40IW_CM_STATE_CLOSED;
2385 i40iw_rem_ref_cm_node(cm_node);
2393 * i40iw_handle_rcv_mpa - Process a recv'd mpa buffer
2394 * @cm_node: connection's node
2395 * @rbuf: receive buffer
2397 static void i40iw_handle_rcv_mpa(struct i40iw_cm_node *cm_node,
2398 struct i40iw_puda_buf *rbuf)
2401 int datasize = rbuf->datalen;
2402 u8 *dataloc = rbuf->data;
2404 enum i40iw_cm_event_type type = I40IW_CM_EVENT_UNKNOWN;
2407 ret = i40iw_parse_mpa(cm_node, dataloc, &res_type, datasize);
2409 if (cm_node->state == I40IW_CM_STATE_MPAREQ_SENT)
2410 i40iw_active_open_err(cm_node, true);
2412 i40iw_passive_open_err(cm_node, true);
2416 switch (cm_node->state) {
2417 case I40IW_CM_STATE_ESTABLISHED:
2418 if (res_type == I40IW_MPA_REQUEST_REJECT)
2419 i40iw_pr_err("state for reject\n");
2420 cm_node->state = I40IW_CM_STATE_MPAREQ_RCVD;
2421 type = I40IW_CM_EVENT_MPA_REQ;
2422 i40iw_send_ack(cm_node); /* ACK received MPA request */
2423 atomic_set(&cm_node->passive_state,
2424 I40IW_PASSIVE_STATE_INDICATED);
2426 case I40IW_CM_STATE_MPAREQ_SENT:
2427 i40iw_cleanup_retrans_entry(cm_node);
2428 if (res_type == I40IW_MPA_REQUEST_REJECT) {
2429 type = I40IW_CM_EVENT_MPA_REJECT;
2430 cm_node->state = I40IW_CM_STATE_MPAREJ_RCVD;
2432 type = I40IW_CM_EVENT_CONNECTED;
2433 cm_node->state = I40IW_CM_STATE_OFFLOADED;
2434 i40iw_send_ack(cm_node);
2438 pr_err("%s wrong cm_node state =%d\n", __func__, cm_node->state);
2441 i40iw_create_event(cm_node, type);
2445 * i40iw_indicate_pkt_err - Send up err event to cm
2446 * @cm_node: connection's node
2448 static void i40iw_indicate_pkt_err(struct i40iw_cm_node *cm_node)
2450 switch (cm_node->state) {
2451 case I40IW_CM_STATE_SYN_SENT:
2452 case I40IW_CM_STATE_MPAREQ_SENT:
2453 i40iw_active_open_err(cm_node, true);
2455 case I40IW_CM_STATE_ESTABLISHED:
2456 case I40IW_CM_STATE_SYN_RCVD:
2457 i40iw_passive_open_err(cm_node, true);
2459 case I40IW_CM_STATE_OFFLOADED:
2466 * i40iw_check_syn - Check for error on received syn ack
2467 * @cm_node: connection's node
2468 * @tcph: pointer tcp header
2470 static int i40iw_check_syn(struct i40iw_cm_node *cm_node, struct tcphdr *tcph)
2474 if (ntohl(tcph->ack_seq) != cm_node->tcp_cntxt.loc_seq_num) {
2476 i40iw_active_open_err(cm_node, true);
2482 * i40iw_check_seq - check seq numbers if OK
2483 * @cm_node: connection's node
2484 * @tcph: pointer tcp header
2486 static int i40iw_check_seq(struct i40iw_cm_node *cm_node, struct tcphdr *tcph)
2491 u32 loc_seq_num = cm_node->tcp_cntxt.loc_seq_num;
2492 u32 rcv_nxt = cm_node->tcp_cntxt.rcv_nxt;
2495 seq = ntohl(tcph->seq);
2496 ack_seq = ntohl(tcph->ack_seq);
2497 rcv_wnd = cm_node->tcp_cntxt.rcv_wnd;
2498 if (ack_seq != loc_seq_num)
2500 else if (!between(seq, rcv_nxt, (rcv_nxt + rcv_wnd)))
2503 i40iw_pr_err("seq number\n");
2504 i40iw_indicate_pkt_err(cm_node);
2510 * i40iw_handle_syn_pkt - is for Passive node
2511 * @cm_node: connection's node
2512 * @rbuf: receive buffer
2514 static void i40iw_handle_syn_pkt(struct i40iw_cm_node *cm_node,
2515 struct i40iw_puda_buf *rbuf)
2517 struct tcphdr *tcph = (struct tcphdr *)rbuf->tcph;
2521 struct i40iw_cm_info nfo;
2523 optionsize = (tcph->doff << 2) - sizeof(struct tcphdr);
2524 inc_sequence = ntohl(tcph->seq);
2526 switch (cm_node->state) {
2527 case I40IW_CM_STATE_SYN_SENT:
2528 case I40IW_CM_STATE_MPAREQ_SENT:
2529 /* Rcvd syn on active open connection */
2530 i40iw_active_open_err(cm_node, 1);
2532 case I40IW_CM_STATE_LISTENING:
2534 if (atomic_read(&cm_node->listener->pend_accepts_cnt) >
2535 cm_node->listener->backlog) {
2536 cm_node->cm_core->stats_backlog_drops++;
2537 i40iw_passive_open_err(cm_node, false);
2540 ret = i40iw_handle_tcp_options(cm_node, tcph, optionsize, 1);
2542 i40iw_passive_open_err(cm_node, false);
2546 cm_node->tcp_cntxt.rcv_nxt = inc_sequence + 1;
2547 cm_node->accept_pend = 1;
2548 atomic_inc(&cm_node->listener->pend_accepts_cnt);
2550 cm_node->state = I40IW_CM_STATE_SYN_RCVD;
2551 i40iw_get_addr_info(cm_node, &nfo);
2552 ret = i40iw_manage_qhash(cm_node->iwdev,
2554 I40IW_QHASH_TYPE_TCP_ESTABLISHED,
2555 I40IW_QHASH_MANAGE_TYPE_ADD,
2558 cm_node->qhash_set = true;
2560 case I40IW_CM_STATE_CLOSED:
2561 i40iw_cleanup_retrans_entry(cm_node);
2562 atomic_inc(&cm_node->ref_count);
2563 i40iw_send_reset(cm_node);
2565 case I40IW_CM_STATE_OFFLOADED:
2566 case I40IW_CM_STATE_ESTABLISHED:
2567 case I40IW_CM_STATE_FIN_WAIT1:
2568 case I40IW_CM_STATE_FIN_WAIT2:
2569 case I40IW_CM_STATE_MPAREQ_RCVD:
2570 case I40IW_CM_STATE_LAST_ACK:
2571 case I40IW_CM_STATE_CLOSING:
2572 case I40IW_CM_STATE_UNKNOWN:
2579 * i40iw_handle_synack_pkt - Process SYN+ACK packet (active side)
2580 * @cm_node: connection's node
2581 * @rbuf: receive buffer
2583 static void i40iw_handle_synack_pkt(struct i40iw_cm_node *cm_node,
2584 struct i40iw_puda_buf *rbuf)
2586 struct tcphdr *tcph = (struct tcphdr *)rbuf->tcph;
2591 optionsize = (tcph->doff << 2) - sizeof(struct tcphdr);
2592 inc_sequence = ntohl(tcph->seq);
2593 switch (cm_node->state) {
2594 case I40IW_CM_STATE_SYN_SENT:
2595 i40iw_cleanup_retrans_entry(cm_node);
2597 if (i40iw_check_syn(cm_node, tcph)) {
2598 i40iw_pr_err("check syn fail\n");
2601 cm_node->tcp_cntxt.rem_ack_num = ntohl(tcph->ack_seq);
2603 ret = i40iw_handle_tcp_options(cm_node, tcph, optionsize, 0);
2605 i40iw_debug(cm_node->dev,
2607 "cm_node=%p tcp_options failed\n",
2611 i40iw_cleanup_retrans_entry(cm_node);
2612 cm_node->tcp_cntxt.rcv_nxt = inc_sequence + 1;
2613 i40iw_send_ack(cm_node); /* ACK for the syn_ack */
2614 ret = i40iw_send_mpa_request(cm_node);
2616 i40iw_debug(cm_node->dev,
2618 "cm_node=%p i40iw_send_mpa_request failed\n",
2622 cm_node->state = I40IW_CM_STATE_MPAREQ_SENT;
2624 case I40IW_CM_STATE_MPAREQ_RCVD:
2625 i40iw_passive_open_err(cm_node, true);
2627 case I40IW_CM_STATE_LISTENING:
2628 cm_node->tcp_cntxt.loc_seq_num = ntohl(tcph->ack_seq);
2629 i40iw_cleanup_retrans_entry(cm_node);
2630 cm_node->state = I40IW_CM_STATE_CLOSED;
2631 i40iw_send_reset(cm_node);
2633 case I40IW_CM_STATE_CLOSED:
2634 cm_node->tcp_cntxt.loc_seq_num = ntohl(tcph->ack_seq);
2635 i40iw_cleanup_retrans_entry(cm_node);
2636 atomic_inc(&cm_node->ref_count);
2637 i40iw_send_reset(cm_node);
2639 case I40IW_CM_STATE_ESTABLISHED:
2640 case I40IW_CM_STATE_FIN_WAIT1:
2641 case I40IW_CM_STATE_FIN_WAIT2:
2642 case I40IW_CM_STATE_LAST_ACK:
2643 case I40IW_CM_STATE_OFFLOADED:
2644 case I40IW_CM_STATE_CLOSING:
2645 case I40IW_CM_STATE_UNKNOWN:
2646 case I40IW_CM_STATE_MPAREQ_SENT:
2653 * i40iw_handle_ack_pkt - process packet with ACK
2654 * @cm_node: connection's node
2655 * @rbuf: receive buffer
2657 static int i40iw_handle_ack_pkt(struct i40iw_cm_node *cm_node,
2658 struct i40iw_puda_buf *rbuf)
2660 struct tcphdr *tcph = (struct tcphdr *)rbuf->tcph;
2664 u32 datasize = rbuf->datalen;
2666 optionsize = (tcph->doff << 2) - sizeof(struct tcphdr);
2668 if (i40iw_check_seq(cm_node, tcph))
2671 inc_sequence = ntohl(tcph->seq);
2672 switch (cm_node->state) {
2673 case I40IW_CM_STATE_SYN_RCVD:
2674 i40iw_cleanup_retrans_entry(cm_node);
2675 ret = i40iw_handle_tcp_options(cm_node, tcph, optionsize, 1);
2678 cm_node->tcp_cntxt.rem_ack_num = ntohl(tcph->ack_seq);
2679 cm_node->state = I40IW_CM_STATE_ESTABLISHED;
2681 cm_node->tcp_cntxt.rcv_nxt = inc_sequence + datasize;
2682 i40iw_handle_rcv_mpa(cm_node, rbuf);
2685 case I40IW_CM_STATE_ESTABLISHED:
2686 i40iw_cleanup_retrans_entry(cm_node);
2688 cm_node->tcp_cntxt.rcv_nxt = inc_sequence + datasize;
2689 i40iw_handle_rcv_mpa(cm_node, rbuf);
2692 case I40IW_CM_STATE_MPAREQ_SENT:
2693 cm_node->tcp_cntxt.rem_ack_num = ntohl(tcph->ack_seq);
2695 cm_node->tcp_cntxt.rcv_nxt = inc_sequence + datasize;
2696 i40iw_handle_rcv_mpa(cm_node, rbuf);
2699 case I40IW_CM_STATE_LISTENING:
2700 i40iw_cleanup_retrans_entry(cm_node);
2701 cm_node->state = I40IW_CM_STATE_CLOSED;
2702 i40iw_send_reset(cm_node);
2704 case I40IW_CM_STATE_CLOSED:
2705 i40iw_cleanup_retrans_entry(cm_node);
2706 atomic_inc(&cm_node->ref_count);
2707 i40iw_send_reset(cm_node);
2709 case I40IW_CM_STATE_LAST_ACK:
2710 case I40IW_CM_STATE_CLOSING:
2711 i40iw_cleanup_retrans_entry(cm_node);
2712 cm_node->state = I40IW_CM_STATE_CLOSED;
2713 if (!cm_node->accept_pend)
2714 cm_node->cm_id->rem_ref(cm_node->cm_id);
2715 i40iw_rem_ref_cm_node(cm_node);
2717 case I40IW_CM_STATE_FIN_WAIT1:
2718 i40iw_cleanup_retrans_entry(cm_node);
2719 cm_node->state = I40IW_CM_STATE_FIN_WAIT2;
2721 case I40IW_CM_STATE_SYN_SENT:
2722 case I40IW_CM_STATE_FIN_WAIT2:
2723 case I40IW_CM_STATE_OFFLOADED:
2724 case I40IW_CM_STATE_MPAREQ_RCVD:
2725 case I40IW_CM_STATE_UNKNOWN:
2727 i40iw_cleanup_retrans_entry(cm_node);
2734 * i40iw_process_packet - process cm packet
2735 * @cm_node: connection's node
2736 * @rbuf: receive buffer
2738 static void i40iw_process_packet(struct i40iw_cm_node *cm_node,
2739 struct i40iw_puda_buf *rbuf)
2741 enum i40iw_tcpip_pkt_type pkt_type = I40IW_PKT_TYPE_UNKNOWN;
2742 struct tcphdr *tcph = (struct tcphdr *)rbuf->tcph;
2747 pkt_type = I40IW_PKT_TYPE_RST;
2748 } else if (tcph->syn) {
2749 pkt_type = I40IW_PKT_TYPE_SYN;
2751 pkt_type = I40IW_PKT_TYPE_SYNACK;
2752 } else if (tcph->ack) {
2753 pkt_type = I40IW_PKT_TYPE_ACK;
2759 case I40IW_PKT_TYPE_SYN:
2760 i40iw_handle_syn_pkt(cm_node, rbuf);
2762 case I40IW_PKT_TYPE_SYNACK:
2763 i40iw_handle_synack_pkt(cm_node, rbuf);
2765 case I40IW_PKT_TYPE_ACK:
2766 ret = i40iw_handle_ack_pkt(cm_node, rbuf);
2767 if (fin_set && !ret)
2768 i40iw_handle_fin_pkt(cm_node);
2770 case I40IW_PKT_TYPE_RST:
2771 i40iw_handle_rst_pkt(cm_node, rbuf);
2775 (!i40iw_check_seq(cm_node, (struct tcphdr *)rbuf->tcph)))
2776 i40iw_handle_fin_pkt(cm_node);
2782 * i40iw_make_listen_node - create a listen node with params
2783 * @cm_core: cm's core
2784 * @iwdev: iwarp device structure
2785 * @cm_info: quad info for connection
2787 static struct i40iw_cm_listener *i40iw_make_listen_node(
2788 struct i40iw_cm_core *cm_core,
2789 struct i40iw_device *iwdev,
2790 struct i40iw_cm_info *cm_info)
2792 struct i40iw_cm_listener *listener;
2793 unsigned long flags;
2795 /* cannot have multiple matching listeners */
2796 listener = i40iw_find_listener(cm_core, cm_info->loc_addr,
2799 I40IW_CM_LISTENER_EITHER_STATE);
2801 (listener->listener_state == I40IW_CM_LISTENER_ACTIVE_STATE)) {
2802 atomic_dec(&listener->ref_count);
2803 i40iw_debug(cm_core->dev,
2805 "Not creating listener since it already exists\n");
2810 /* create a CM listen node (1/2 node to compare incoming traffic to) */
2811 listener = kzalloc(sizeof(*listener), GFP_ATOMIC);
2814 cm_core->stats_listen_nodes_created++;
2815 memcpy(listener->loc_addr, cm_info->loc_addr, sizeof(listener->loc_addr));
2816 listener->loc_port = cm_info->loc_port;
2818 INIT_LIST_HEAD(&listener->child_listen_list);
2820 atomic_set(&listener->ref_count, 1);
2822 listener->reused_node = 1;
2825 listener->cm_id = cm_info->cm_id;
2826 listener->ipv4 = cm_info->ipv4;
2827 listener->vlan_id = cm_info->vlan_id;
2828 atomic_set(&listener->pend_accepts_cnt, 0);
2829 listener->cm_core = cm_core;
2830 listener->iwdev = iwdev;
2832 listener->backlog = cm_info->backlog;
2833 listener->listener_state = I40IW_CM_LISTENER_ACTIVE_STATE;
2835 if (!listener->reused_node) {
2836 spin_lock_irqsave(&cm_core->listen_list_lock, flags);
2837 list_add(&listener->list, &cm_core->listen_nodes);
2838 spin_unlock_irqrestore(&cm_core->listen_list_lock, flags);
2845 * i40iw_create_cm_node - make a connection node with params
2846 * @cm_core: cm's core
2847 * @iwdev: iwarp device structure
2848 * @private_data_len: len to provate data for mpa request
2849 * @private_data: pointer to private data for connection
2850 * @cm_info: quad info for connection
2852 static struct i40iw_cm_node *i40iw_create_cm_node(
2853 struct i40iw_cm_core *cm_core,
2854 struct i40iw_device *iwdev,
2855 u16 private_data_len,
2857 struct i40iw_cm_info *cm_info)
2860 struct i40iw_cm_node *cm_node;
2861 struct i40iw_cm_listener *loopback_remotelistener;
2862 struct i40iw_cm_node *loopback_remotenode;
2863 struct i40iw_cm_info loopback_cm_info;
2865 /* create a CM connection node */
2866 cm_node = i40iw_make_cm_node(cm_core, iwdev, cm_info, NULL);
2869 /* set our node side to client (active) side */
2870 cm_node->tcp_cntxt.client = 1;
2871 cm_node->tcp_cntxt.rcv_wscale = I40IW_CM_DEFAULT_RCV_WND_SCALE;
2873 if (!memcmp(cm_info->loc_addr, cm_info->rem_addr, sizeof(cm_info->loc_addr))) {
2874 loopback_remotelistener = i40iw_find_listener(
2879 I40IW_CM_LISTENER_ACTIVE_STATE);
2880 if (!loopback_remotelistener) {
2881 i40iw_create_event(cm_node, I40IW_CM_EVENT_ABORTED);
2883 loopback_cm_info = *cm_info;
2884 loopback_cm_info.loc_port = cm_info->rem_port;
2885 loopback_cm_info.rem_port = cm_info->loc_port;
2886 loopback_cm_info.cm_id = loopback_remotelistener->cm_id;
2887 loopback_cm_info.ipv4 = cm_info->ipv4;
2888 loopback_remotenode = i40iw_make_cm_node(cm_core,
2891 loopback_remotelistener);
2892 if (!loopback_remotenode) {
2893 i40iw_rem_ref_cm_node(cm_node);
2896 cm_core->stats_loopbacks++;
2897 loopback_remotenode->loopbackpartner = cm_node;
2898 loopback_remotenode->tcp_cntxt.rcv_wscale =
2899 I40IW_CM_DEFAULT_RCV_WND_SCALE;
2900 cm_node->loopbackpartner = loopback_remotenode;
2901 memcpy(loopback_remotenode->pdata_buf, private_data,
2903 loopback_remotenode->pdata.size = private_data_len;
2905 cm_node->state = I40IW_CM_STATE_OFFLOADED;
2906 cm_node->tcp_cntxt.rcv_nxt =
2907 loopback_remotenode->tcp_cntxt.loc_seq_num;
2908 loopback_remotenode->tcp_cntxt.rcv_nxt =
2909 cm_node->tcp_cntxt.loc_seq_num;
2910 cm_node->tcp_cntxt.max_snd_wnd =
2911 loopback_remotenode->tcp_cntxt.rcv_wnd;
2912 loopback_remotenode->tcp_cntxt.max_snd_wnd = cm_node->tcp_cntxt.rcv_wnd;
2913 cm_node->tcp_cntxt.snd_wnd = loopback_remotenode->tcp_cntxt.rcv_wnd;
2914 loopback_remotenode->tcp_cntxt.snd_wnd = cm_node->tcp_cntxt.rcv_wnd;
2915 cm_node->tcp_cntxt.snd_wscale = loopback_remotenode->tcp_cntxt.rcv_wscale;
2916 loopback_remotenode->tcp_cntxt.snd_wscale = cm_node->tcp_cntxt.rcv_wscale;
2917 loopback_remotenode->state = I40IW_CM_STATE_MPAREQ_RCVD;
2918 i40iw_create_event(loopback_remotenode, I40IW_CM_EVENT_MPA_REQ);
2923 cm_node->pdata.size = private_data_len;
2924 cm_node->pdata.addr = cm_node->pdata_buf;
2926 memcpy(cm_node->pdata_buf, private_data, private_data_len);
2928 cm_node->state = I40IW_CM_STATE_SYN_SENT;
2929 ret = i40iw_send_syn(cm_node, 0);
2933 i40iw_debug(cm_node->dev,
2935 "Api - connect() FAILED: dest addr=%pI4",
2938 i40iw_debug(cm_node->dev, I40IW_DEBUG_CM,
2939 "Api - connect() FAILED: dest addr=%pI6",
2941 i40iw_rem_ref_cm_node(cm_node);
2946 i40iw_debug(cm_node->dev,
2948 "Api - connect(): port=0x%04x, cm_node=%p, cm_id = %p.\n",
2957 * i40iw_cm_reject - reject and teardown a connection
2958 * @cm_node: connection's node
2959 * @pdate: ptr to private data for reject
2960 * @plen: size of private data
2962 static int i40iw_cm_reject(struct i40iw_cm_node *cm_node, const void *pdata, u8 plen)
2967 struct iw_cm_id *cm_id = cm_node->cm_id;
2968 struct i40iw_cm_node *loopback = cm_node->loopbackpartner;
2970 if (cm_node->tcp_cntxt.client)
2972 i40iw_cleanup_retrans_entry(cm_node);
2975 passive_state = atomic_add_return(1, &cm_node->passive_state);
2976 if (passive_state == I40IW_SEND_RESET_EVENT) {
2977 cm_node->state = I40IW_CM_STATE_CLOSED;
2978 i40iw_rem_ref_cm_node(cm_node);
2980 if (cm_node->state == I40IW_CM_STATE_LISTENER_DESTROYED) {
2981 i40iw_rem_ref_cm_node(cm_node);
2983 ret = i40iw_send_mpa_reject(cm_node, pdata, plen);
2985 cm_node->state = I40IW_CM_STATE_CLOSED;
2986 err = i40iw_send_reset(cm_node);
2988 i40iw_pr_err("send reset failed\n");
2990 cm_id->add_ref(cm_id);
2995 cm_node->cm_id = NULL;
2996 if (cm_node->state == I40IW_CM_STATE_LISTENER_DESTROYED) {
2997 i40iw_rem_ref_cm_node(cm_node);
2998 i40iw_rem_ref_cm_node(loopback);
3000 ret = i40iw_send_cm_event(loopback,
3002 IW_CM_EVENT_CONNECT_REPLY,
3004 i40iw_rem_ref_cm_node(cm_node);
3005 loopback->state = I40IW_CM_STATE_CLOSING;
3007 cm_id = loopback->cm_id;
3008 i40iw_rem_ref_cm_node(loopback);
3009 cm_id->rem_ref(cm_id);
3017 * i40iw_cm_close - close of cm connection
3018 * @cm_node: connection's node
3020 static int i40iw_cm_close(struct i40iw_cm_node *cm_node)
3027 switch (cm_node->state) {
3028 case I40IW_CM_STATE_SYN_RCVD:
3029 case I40IW_CM_STATE_SYN_SENT:
3030 case I40IW_CM_STATE_ONE_SIDE_ESTABLISHED:
3031 case I40IW_CM_STATE_ESTABLISHED:
3032 case I40IW_CM_STATE_ACCEPTING:
3033 case I40IW_CM_STATE_MPAREQ_SENT:
3034 case I40IW_CM_STATE_MPAREQ_RCVD:
3035 i40iw_cleanup_retrans_entry(cm_node);
3036 i40iw_send_reset(cm_node);
3038 case I40IW_CM_STATE_CLOSE_WAIT:
3039 cm_node->state = I40IW_CM_STATE_LAST_ACK;
3040 i40iw_send_fin(cm_node);
3042 case I40IW_CM_STATE_FIN_WAIT1:
3043 case I40IW_CM_STATE_FIN_WAIT2:
3044 case I40IW_CM_STATE_LAST_ACK:
3045 case I40IW_CM_STATE_TIME_WAIT:
3046 case I40IW_CM_STATE_CLOSING:
3049 case I40IW_CM_STATE_LISTENING:
3050 i40iw_cleanup_retrans_entry(cm_node);
3051 i40iw_send_reset(cm_node);
3053 case I40IW_CM_STATE_MPAREJ_RCVD:
3054 case I40IW_CM_STATE_UNKNOWN:
3055 case I40IW_CM_STATE_INITED:
3056 case I40IW_CM_STATE_CLOSED:
3057 case I40IW_CM_STATE_LISTENER_DESTROYED:
3058 i40iw_rem_ref_cm_node(cm_node);
3060 case I40IW_CM_STATE_OFFLOADED:
3061 if (cm_node->send_entry)
3062 i40iw_pr_err("send_entry\n");
3063 i40iw_rem_ref_cm_node(cm_node);
3070 * i40iw_receive_ilq - recv an ETHERNET packet, and process it
3072 * @dev: FPK dev struct
3073 * @rbuf: receive buffer
3075 void i40iw_receive_ilq(struct i40iw_sc_dev *dev, struct i40iw_puda_buf *rbuf)
3077 struct i40iw_cm_node *cm_node;
3078 struct i40iw_cm_listener *listener;
3080 struct ipv6hdr *ip6h;
3081 struct tcphdr *tcph;
3082 struct i40iw_cm_info cm_info;
3083 struct i40iw_device *iwdev = (struct i40iw_device *)dev->back_dev;
3084 struct i40iw_cm_core *cm_core = &iwdev->cm_core;
3085 struct vlan_ethhdr *ethh;
3087 /* if vlan, then maclen = 18 else 14 */
3088 iph = (struct iphdr *)rbuf->iph;
3089 memset(&cm_info, 0, sizeof(cm_info));
3091 i40iw_debug_buf(dev,
3093 "RECEIVE ILQ BUFFER",
3096 ethh = (struct vlan_ethhdr *)rbuf->mem.va;
3098 if (ethh->h_vlan_proto == htons(ETH_P_8021Q)) {
3099 cm_info.vlan_id = ntohs(ethh->h_vlan_TCI) & VLAN_VID_MASK;
3100 i40iw_debug(cm_core->dev,
3106 cm_info.vlan_id = I40IW_NO_VLAN;
3108 tcph = (struct tcphdr *)rbuf->tcph;
3111 cm_info.loc_addr[0] = ntohl(iph->daddr);
3112 cm_info.rem_addr[0] = ntohl(iph->saddr);
3113 cm_info.ipv4 = true;
3115 ip6h = (struct ipv6hdr *)rbuf->iph;
3116 i40iw_copy_ip_ntohl(cm_info.loc_addr,
3117 ip6h->daddr.in6_u.u6_addr32);
3118 i40iw_copy_ip_ntohl(cm_info.rem_addr,
3119 ip6h->saddr.in6_u.u6_addr32);
3120 cm_info.ipv4 = false;
3122 cm_info.loc_port = ntohs(tcph->dest);
3123 cm_info.rem_port = ntohs(tcph->source);
3124 cm_node = i40iw_find_node(cm_core,
3132 /* Only type of packet accepted are for */
3133 /* the PASSIVE open (syn only) */
3134 if (!tcph->syn || tcph->ack)
3137 i40iw_find_listener(cm_core,
3141 I40IW_CM_LISTENER_ACTIVE_STATE);
3143 cm_info.cm_id = NULL;
3144 i40iw_debug(cm_core->dev,
3146 "%s no listener found\n",
3150 cm_info.cm_id = listener->cm_id;
3151 cm_node = i40iw_make_cm_node(cm_core, iwdev, &cm_info, listener);
3153 i40iw_debug(cm_core->dev,
3155 "%s allocate node failed\n",
3157 atomic_dec(&listener->ref_count);
3160 if (!tcph->rst && !tcph->fin) {
3161 cm_node->state = I40IW_CM_STATE_LISTENING;
3163 i40iw_rem_ref_cm_node(cm_node);
3166 atomic_inc(&cm_node->ref_count);
3167 } else if (cm_node->state == I40IW_CM_STATE_OFFLOADED) {
3168 i40iw_rem_ref_cm_node(cm_node);
3171 i40iw_process_packet(cm_node, rbuf);
3172 i40iw_rem_ref_cm_node(cm_node);
3176 * i40iw_setup_cm_core - allocate a top level instance of a cm
3178 * @iwdev: iwarp device structure
3180 void i40iw_setup_cm_core(struct i40iw_device *iwdev)
3182 struct i40iw_cm_core *cm_core = &iwdev->cm_core;
3184 cm_core->iwdev = iwdev;
3185 cm_core->dev = &iwdev->sc_dev;
3187 INIT_LIST_HEAD(&cm_core->connected_nodes);
3188 INIT_LIST_HEAD(&cm_core->listen_nodes);
3190 init_timer(&cm_core->tcp_timer);
3191 cm_core->tcp_timer.function = i40iw_cm_timer_tick;
3192 cm_core->tcp_timer.data = (unsigned long)cm_core;
3194 spin_lock_init(&cm_core->ht_lock);
3195 spin_lock_init(&cm_core->listen_list_lock);
3197 cm_core->event_wq = create_singlethread_workqueue("iwewq");
3198 cm_core->disconn_wq = create_singlethread_workqueue("iwdwq");
3202 * i40iw_cleanup_cm_core - deallocate a top level instance of a
3204 * @cm_core: cm's core
3206 void i40iw_cleanup_cm_core(struct i40iw_cm_core *cm_core)
3208 unsigned long flags;
3213 spin_lock_irqsave(&cm_core->ht_lock, flags);
3214 if (timer_pending(&cm_core->tcp_timer))
3215 del_timer_sync(&cm_core->tcp_timer);
3216 spin_unlock_irqrestore(&cm_core->ht_lock, flags);
3218 destroy_workqueue(cm_core->event_wq);
3219 destroy_workqueue(cm_core->disconn_wq);
3223 * i40iw_init_tcp_ctx - setup qp context
3224 * @cm_node: connection's node
3225 * @tcp_info: offload info for tcp
3226 * @iwqp: associate qp for the connection
3228 static void i40iw_init_tcp_ctx(struct i40iw_cm_node *cm_node,
3229 struct i40iw_tcp_offload_info *tcp_info,
3230 struct i40iw_qp *iwqp)
3232 tcp_info->ipv4 = cm_node->ipv4;
3233 tcp_info->drop_ooo_seg = true;
3234 tcp_info->wscale = true;
3235 tcp_info->ignore_tcp_opt = true;
3236 tcp_info->ignore_tcp_uns_opt = true;
3237 tcp_info->no_nagle = false;
3239 tcp_info->ttl = I40IW_DEFAULT_TTL;
3240 tcp_info->rtt_var = cpu_to_le32(I40IW_DEFAULT_RTT_VAR);
3241 tcp_info->ss_thresh = cpu_to_le32(I40IW_DEFAULT_SS_THRESH);
3242 tcp_info->rexmit_thresh = I40IW_DEFAULT_REXMIT_THRESH;
3244 tcp_info->tcp_state = I40IW_TCP_STATE_ESTABLISHED;
3245 tcp_info->snd_wscale = cm_node->tcp_cntxt.snd_wscale;
3246 tcp_info->rcv_wscale = cm_node->tcp_cntxt.rcv_wscale;
3248 tcp_info->snd_nxt = cpu_to_le32(cm_node->tcp_cntxt.loc_seq_num);
3249 tcp_info->snd_wnd = cpu_to_le32(cm_node->tcp_cntxt.snd_wnd);
3250 tcp_info->rcv_nxt = cpu_to_le32(cm_node->tcp_cntxt.rcv_nxt);
3251 tcp_info->snd_max = cpu_to_le32(cm_node->tcp_cntxt.loc_seq_num);
3253 tcp_info->snd_una = cpu_to_le32(cm_node->tcp_cntxt.loc_seq_num);
3254 tcp_info->cwnd = cpu_to_le32(2 * cm_node->tcp_cntxt.mss);
3255 tcp_info->snd_wl1 = cpu_to_le32(cm_node->tcp_cntxt.rcv_nxt);
3256 tcp_info->snd_wl2 = cpu_to_le32(cm_node->tcp_cntxt.loc_seq_num);
3257 tcp_info->max_snd_window = cpu_to_le32(cm_node->tcp_cntxt.max_snd_wnd);
3258 tcp_info->rcv_wnd = cpu_to_le32(cm_node->tcp_cntxt.rcv_wnd <<
3259 cm_node->tcp_cntxt.rcv_wscale);
3261 tcp_info->flow_label = 0;
3262 tcp_info->snd_mss = cpu_to_le32(((u32)cm_node->tcp_cntxt.mss));
3263 if (cm_node->vlan_id < VLAN_TAG_PRESENT) {
3264 tcp_info->insert_vlan_tag = true;
3265 tcp_info->vlan_tag = cpu_to_le16(cm_node->vlan_id);
3267 if (cm_node->ipv4) {
3268 tcp_info->src_port = cpu_to_le16(cm_node->loc_port);
3269 tcp_info->dst_port = cpu_to_le16(cm_node->rem_port);
3271 tcp_info->dest_ip_addr3 = cpu_to_le32(cm_node->rem_addr[0]);
3272 tcp_info->local_ipaddr3 = cpu_to_le32(cm_node->loc_addr[0]);
3273 tcp_info->arp_idx = cpu_to_le32(i40iw_arp_table(iwqp->iwdev,
3274 &tcp_info->dest_ip_addr3,
3277 I40IW_ARP_RESOLVE));
3279 tcp_info->src_port = cpu_to_le16(cm_node->loc_port);
3280 tcp_info->dst_port = cpu_to_le16(cm_node->rem_port);
3281 tcp_info->dest_ip_addr0 = cpu_to_le32(cm_node->rem_addr[0]);
3282 tcp_info->dest_ip_addr1 = cpu_to_le32(cm_node->rem_addr[1]);
3283 tcp_info->dest_ip_addr2 = cpu_to_le32(cm_node->rem_addr[2]);
3284 tcp_info->dest_ip_addr3 = cpu_to_le32(cm_node->rem_addr[3]);
3285 tcp_info->local_ipaddr0 = cpu_to_le32(cm_node->loc_addr[0]);
3286 tcp_info->local_ipaddr1 = cpu_to_le32(cm_node->loc_addr[1]);
3287 tcp_info->local_ipaddr2 = cpu_to_le32(cm_node->loc_addr[2]);
3288 tcp_info->local_ipaddr3 = cpu_to_le32(cm_node->loc_addr[3]);
3289 tcp_info->arp_idx = cpu_to_le32(i40iw_arp_table(
3291 &tcp_info->dest_ip_addr0,
3294 I40IW_ARP_RESOLVE));
3299 * i40iw_cm_init_tsa_conn - setup qp for RTS
3300 * @iwqp: associate qp for the connection
3301 * @cm_node: connection's node
3303 static void i40iw_cm_init_tsa_conn(struct i40iw_qp *iwqp,
3304 struct i40iw_cm_node *cm_node)
3306 struct i40iw_tcp_offload_info tcp_info;
3307 struct i40iwarp_offload_info *iwarp_info;
3308 struct i40iw_qp_host_ctx_info *ctx_info;
3309 struct i40iw_device *iwdev = iwqp->iwdev;
3310 struct i40iw_sc_dev *dev = &iwqp->iwdev->sc_dev;
3312 memset(&tcp_info, 0x00, sizeof(struct i40iw_tcp_offload_info));
3313 iwarp_info = &iwqp->iwarp_info;
3314 ctx_info = &iwqp->ctx_info;
3316 ctx_info->tcp_info = &tcp_info;
3317 ctx_info->send_cq_num = iwqp->iwscq->sc_cq.cq_uk.cq_id;
3318 ctx_info->rcv_cq_num = iwqp->iwrcq->sc_cq.cq_uk.cq_id;
3320 iwarp_info->ord_size = cm_node->ord_size;
3321 iwarp_info->ird_size = i40iw_derive_hw_ird_setting(cm_node->ird_size);
3323 if (iwarp_info->ord_size == 1)
3324 iwarp_info->ord_size = 2;
3326 iwarp_info->rd_enable = true;
3327 iwarp_info->rdmap_ver = 1;
3328 iwarp_info->ddp_ver = 1;
3330 iwarp_info->pd_id = iwqp->iwpd->sc_pd.pd_id;
3332 ctx_info->tcp_info_valid = true;
3333 ctx_info->iwarp_info_valid = true;
3335 i40iw_init_tcp_ctx(cm_node, &tcp_info, iwqp);
3336 if (cm_node->snd_mark_en) {
3337 iwarp_info->snd_mark_en = true;
3338 iwarp_info->snd_mark_offset = (tcp_info.snd_nxt &
3339 SNDMARKER_SEQNMASK) + cm_node->lsmm_size;
3342 cm_node->state = I40IW_CM_STATE_OFFLOADED;
3343 tcp_info.tcp_state = I40IW_TCP_STATE_ESTABLISHED;
3344 tcp_info.src_mac_addr_idx = iwdev->mac_ip_table_idx;
3346 dev->iw_priv_qp_ops->qp_setctx(&iwqp->sc_qp, (u64 *)(iwqp->host_ctx.va), ctx_info);
3348 /* once tcp_info is set, no need to do it again */
3349 ctx_info->tcp_info_valid = false;
3350 ctx_info->iwarp_info_valid = false;
3354 * i40iw_cm_disconn - when a connection is being closed
3355 * @iwqp: associate qp for the connection
3357 int i40iw_cm_disconn(struct i40iw_qp *iwqp)
3359 struct disconn_work *work;
3360 struct i40iw_device *iwdev = iwqp->iwdev;
3361 struct i40iw_cm_core *cm_core = &iwdev->cm_core;
3363 work = kzalloc(sizeof(*work), GFP_ATOMIC);
3365 return -ENOMEM; /* Timer will clean up */
3367 i40iw_add_ref(&iwqp->ibqp);
3369 INIT_WORK(&work->work, i40iw_disconnect_worker);
3370 queue_work(cm_core->disconn_wq, &work->work);
3375 * i40iw_loopback_nop - Send a nop
3376 * @qp: associated hw qp
3378 static void i40iw_loopback_nop(struct i40iw_sc_qp *qp)
3383 wqe = qp->qp_uk.sq_base->elem;
3384 set_64bit_val(wqe, 0, 0);
3385 set_64bit_val(wqe, 8, 0);
3386 set_64bit_val(wqe, 16, 0);
3388 header = LS_64(I40IWQP_OP_NOP, I40IWQPSQ_OPCODE) |
3389 LS_64(0, I40IWQPSQ_SIGCOMPL) |
3390 LS_64(qp->qp_uk.swqe_polarity, I40IWQPSQ_VALID);
3391 set_64bit_val(wqe, 24, header);
3395 * i40iw_qp_disconnect - free qp and close cm
3396 * @iwqp: associate qp for the connection
3398 static void i40iw_qp_disconnect(struct i40iw_qp *iwqp)
3400 struct i40iw_device *iwdev;
3401 struct i40iw_ib_device *iwibdev;
3403 iwdev = to_iwdev(iwqp->ibqp.device);
3405 i40iw_pr_err("iwdev == NULL\n");
3409 iwibdev = iwdev->iwibdev;
3411 if (iwqp->active_conn) {
3412 /* indicate this connection is NOT active */
3413 iwqp->active_conn = 0;
3415 /* Need to free the Last Streaming Mode Message */
3416 if (iwqp->ietf_mem.va) {
3418 iwibdev->ibdev.dereg_mr(iwqp->lsmm_mr);
3419 i40iw_free_dma_mem(iwdev->sc_dev.hw, &iwqp->ietf_mem);
3423 /* close the CM node down if it is still active */
3424 if (iwqp->cm_node) {
3425 i40iw_debug(&iwdev->sc_dev, I40IW_DEBUG_CM, "%s Call close API\n", __func__);
3426 i40iw_cm_close(iwqp->cm_node);
3431 * i40iw_cm_disconn_true - called by worker thread to disconnect qp
3432 * @iwqp: associate qp for the connection
3434 static void i40iw_cm_disconn_true(struct i40iw_qp *iwqp)
3436 struct iw_cm_id *cm_id;
3437 struct i40iw_device *iwdev;
3438 struct i40iw_sc_qp *qp = &iwqp->sc_qp;
3440 u8 original_hw_tcp_state;
3441 u8 original_ibqp_state;
3442 int disconn_status = 0;
3443 int issue_disconn = 0;
3444 int issue_close = 0;
3445 int issue_flush = 0;
3446 struct ib_event ibevent;
3447 unsigned long flags;
3451 i40iw_pr_err("iwqp == NULL\n");
3455 spin_lock_irqsave(&iwqp->lock, flags);
3456 cm_id = iwqp->cm_id;
3457 /* make sure we havent already closed this connection */
3459 spin_unlock_irqrestore(&iwqp->lock, flags);
3463 iwdev = to_iwdev(iwqp->ibqp.device);
3465 original_hw_tcp_state = iwqp->hw_tcp_state;
3466 original_ibqp_state = iwqp->ibqp_state;
3467 last_ae = iwqp->last_aeq;
3469 if (qp->term_flags) {
3473 /*When term timer expires after cm_timer, don't want
3474 *terminate-handler to issue cm_disconn which can re-free
3475 *a QP even after its refcnt=0.
3477 del_timer(&iwqp->terminate_timer);
3478 if (!iwqp->flush_issued) {
3479 iwqp->flush_issued = 1;
3482 } else if ((original_hw_tcp_state == I40IW_TCP_STATE_CLOSE_WAIT) ||
3483 ((original_ibqp_state == IB_QPS_RTS) &&
3484 (last_ae == I40IW_AE_LLP_CONNECTION_RESET))) {
3486 if (last_ae == I40IW_AE_LLP_CONNECTION_RESET)
3487 disconn_status = -ECONNRESET;
3490 if (((original_hw_tcp_state == I40IW_TCP_STATE_CLOSED) ||
3491 (original_hw_tcp_state == I40IW_TCP_STATE_TIME_WAIT) ||
3492 (last_ae == I40IW_AE_RDMAP_ROE_BAD_LLP_CLOSE) ||
3493 (last_ae == I40IW_AE_LLP_CONNECTION_RESET))) {
3496 if (!iwqp->flush_issued) {
3497 iwqp->flush_issued = 1;
3502 spin_unlock_irqrestore(&iwqp->lock, flags);
3503 if (issue_flush && !iwqp->destroyed) {
3504 /* Flush the queues */
3505 i40iw_flush_wqes(iwdev, iwqp);
3507 if (qp->term_flags) {
3508 ibevent.device = iwqp->ibqp.device;
3509 ibevent.event = (qp->eventtype == TERM_EVENT_QP_FATAL) ?
3510 IB_EVENT_QP_FATAL : IB_EVENT_QP_ACCESS_ERR;
3511 ibevent.element.qp = &iwqp->ibqp;
3512 iwqp->ibqp.event_handler(&ibevent, iwqp->ibqp.qp_context);
3516 if (cm_id && cm_id->event_handler) {
3517 if (issue_disconn) {
3518 ret = i40iw_send_cm_event(NULL,
3520 IW_CM_EVENT_DISCONNECT,
3524 i40iw_debug(&iwdev->sc_dev,
3526 "disconnect event failed %s: - cm_id = %p\n",
3530 i40iw_qp_disconnect(iwqp);
3531 cm_id->provider_data = iwqp;
3532 ret = i40iw_send_cm_event(NULL, cm_id, IW_CM_EVENT_CLOSE, 0);
3534 i40iw_debug(&iwdev->sc_dev,
3536 "close event failed %s: - cm_id = %p\n",
3538 cm_id->rem_ref(cm_id);
3544 * i40iw_disconnect_worker - worker for connection close
3545 * @work: points or disconn structure
3547 static void i40iw_disconnect_worker(struct work_struct *work)
3549 struct disconn_work *dwork = container_of(work, struct disconn_work, work);
3550 struct i40iw_qp *iwqp = dwork->iwqp;
3553 i40iw_cm_disconn_true(iwqp);
3554 i40iw_rem_ref(&iwqp->ibqp);
3558 * i40iw_accept - registered call for connection to be accepted
3559 * @cm_id: cm information for passive connection
3560 * @conn_param: accpet parameters
3562 int i40iw_accept(struct iw_cm_id *cm_id, struct iw_cm_conn_param *conn_param)
3565 struct i40iw_qp *iwqp;
3566 struct i40iw_device *iwdev;
3567 struct i40iw_sc_dev *dev;
3568 struct i40iw_cm_node *cm_node;
3569 struct ib_qp_attr attr;
3571 struct i40iw_ib_device *iwibdev;
3573 struct i40iw_pd *iwpd;
3575 struct i40iw_kmem_info accept;
3576 enum i40iw_status_code status;
3579 memset(&attr, 0, sizeof(attr));
3580 ibqp = i40iw_get_qp(cm_id->device, conn_param->qpn);
3584 iwqp = to_iwqp(ibqp);
3585 iwdev = iwqp->iwdev;
3586 dev = &iwdev->sc_dev;
3587 cm_node = (struct i40iw_cm_node *)cm_id->provider_data;
3589 if (((struct sockaddr_in *)&cm_id->local_addr)->sin_family == AF_INET) {
3590 cm_node->ipv4 = true;
3591 cm_node->vlan_id = i40iw_get_vlan_ipv4(cm_node->loc_addr);
3593 cm_node->ipv4 = false;
3594 i40iw_netdev_vlan_ipv6(cm_node->loc_addr, &cm_node->vlan_id, NULL);
3596 i40iw_debug(cm_node->dev,
3598 "Accept vlan_id=%d\n",
3600 if (cm_node->state == I40IW_CM_STATE_LISTENER_DESTROYED) {
3601 if (cm_node->loopbackpartner)
3602 i40iw_rem_ref_cm_node(cm_node->loopbackpartner);
3603 i40iw_rem_ref_cm_node(cm_node);
3607 passive_state = atomic_add_return(1, &cm_node->passive_state);
3608 if (passive_state == I40IW_SEND_RESET_EVENT) {
3609 i40iw_rem_ref_cm_node(cm_node);
3613 cm_node->cm_core->stats_accepts++;
3614 iwqp->cm_node = (void *)cm_node;
3615 cm_node->iwqp = iwqp;
3617 buf_len = conn_param->private_data_len + I40IW_MAX_IETF_SIZE + MPA_ZERO_PAD_LEN;
3619 status = i40iw_allocate_dma_mem(dev->hw, &iwqp->ietf_mem, buf_len, 1);
3623 cm_node->pdata.size = conn_param->private_data_len;
3624 accept.addr = iwqp->ietf_mem.va;
3625 accept.size = i40iw_cm_build_mpa_frame(cm_node, &accept, MPA_KEY_REPLY);
3626 memcpy(accept.addr + accept.size, conn_param->private_data,
3627 conn_param->private_data_len);
3629 /* setup our first outgoing iWarp send WQE (the IETF frame response) */
3630 if ((cm_node->ipv4 &&
3631 !i40iw_ipv4_is_loopback(cm_node->loc_addr[0], cm_node->rem_addr[0])) ||
3633 !i40iw_ipv6_is_loopback(cm_node->loc_addr, cm_node->rem_addr))) {
3634 iwibdev = iwdev->iwibdev;
3636 tagged_offset = (uintptr_t)iwqp->ietf_mem.va;
3637 ibmr = i40iw_reg_phys_mr(&iwpd->ibpd,
3640 IB_ACCESS_LOCAL_WRITE,
3643 i40iw_free_dma_mem(dev->hw, &iwqp->ietf_mem);
3647 ibmr->pd = &iwpd->ibpd;
3648 ibmr->device = iwpd->ibpd.device;
3649 iwqp->lsmm_mr = ibmr;
3651 iwqp->sc_qp.qp_uk.sq_base = kmap(iwqp->page);
3652 if (is_remote_ne020_or_chelsio(cm_node))
3653 dev->iw_priv_qp_ops->qp_send_lsmm(
3656 (accept.size + conn_param->private_data_len),
3659 dev->iw_priv_qp_ops->qp_send_lsmm(
3662 (accept.size + conn_param->private_data_len + MPA_ZERO_PAD_LEN),
3667 iwqp->sc_qp.qp_uk.sq_base = kmap(iwqp->page);
3668 i40iw_loopback_nop(&iwqp->sc_qp);
3674 iwqp->cm_id = cm_id;
3675 cm_node->cm_id = cm_id;
3677 cm_id->provider_data = (void *)iwqp;
3678 iwqp->active_conn = 0;
3680 cm_node->lsmm_size = accept.size + conn_param->private_data_len;
3681 i40iw_cm_init_tsa_conn(iwqp, cm_node);
3682 cm_id->add_ref(cm_id);
3683 i40iw_add_ref(&iwqp->ibqp);
3685 i40iw_send_cm_event(cm_node, cm_id, IW_CM_EVENT_ESTABLISHED, 0);
3687 attr.qp_state = IB_QPS_RTS;
3688 cm_node->qhash_set = false;
3689 i40iw_modify_qp(&iwqp->ibqp, &attr, IB_QP_STATE, NULL);
3690 if (cm_node->loopbackpartner) {
3691 cm_node->loopbackpartner->pdata.size = conn_param->private_data_len;
3693 /* copy entire MPA frame to our cm_node's frame */
3694 memcpy(cm_node->loopbackpartner->pdata_buf,
3695 conn_param->private_data,
3696 conn_param->private_data_len);
3697 i40iw_create_event(cm_node->loopbackpartner, I40IW_CM_EVENT_CONNECTED);
3700 cm_node->accelerated = 1;
3701 if (cm_node->accept_pend) {
3702 if (!cm_node->listener)
3703 i40iw_pr_err("cm_node->listener NULL for passive node\n");
3704 atomic_dec(&cm_node->listener->pend_accepts_cnt);
3705 cm_node->accept_pend = 0;
3711 * i40iw_reject - registered call for connection to be rejected
3712 * @cm_id: cm information for passive connection
3713 * @pdata: private data to be sent
3714 * @pdata_len: private data length
3716 int i40iw_reject(struct iw_cm_id *cm_id, const void *pdata, u8 pdata_len)
3718 struct i40iw_device *iwdev;
3719 struct i40iw_cm_node *cm_node;
3720 struct i40iw_cm_node *loopback;
3722 cm_node = (struct i40iw_cm_node *)cm_id->provider_data;
3723 loopback = cm_node->loopbackpartner;
3724 cm_node->cm_id = cm_id;
3725 cm_node->pdata.size = pdata_len;
3727 iwdev = to_iwdev(cm_id->device);
3730 cm_node->cm_core->stats_rejects++;
3732 if (pdata_len + sizeof(struct ietf_mpa_v2) > MAX_CM_BUFFER)
3736 memcpy(&loopback->pdata_buf, pdata, pdata_len);
3737 loopback->pdata.size = pdata_len;
3740 return i40iw_cm_reject(cm_node, pdata, pdata_len);
3744 * i40iw_connect - registered call for connection to be established
3745 * @cm_id: cm information for passive connection
3746 * @conn_param: Information about the connection
3748 int i40iw_connect(struct iw_cm_id *cm_id, struct iw_cm_conn_param *conn_param)
3751 struct i40iw_qp *iwqp;
3752 struct i40iw_device *iwdev;
3753 struct i40iw_cm_node *cm_node;
3754 struct i40iw_cm_info cm_info;
3755 struct sockaddr_in *laddr;
3756 struct sockaddr_in *raddr;
3757 struct sockaddr_in6 *laddr6;
3758 struct sockaddr_in6 *raddr6;
3760 enum i40iw_status_code status;
3762 ibqp = i40iw_get_qp(cm_id->device, conn_param->qpn);
3765 iwqp = to_iwqp(ibqp);
3768 iwdev = to_iwdev(iwqp->ibqp.device);
3772 laddr = (struct sockaddr_in *)&cm_id->m_local_addr;
3773 raddr = (struct sockaddr_in *)&cm_id->m_remote_addr;
3774 laddr6 = (struct sockaddr_in6 *)&cm_id->m_local_addr;
3775 raddr6 = (struct sockaddr_in6 *)&cm_id->m_remote_addr;
3777 if (!(laddr->sin_port) || !(raddr->sin_port))
3780 iwqp->active_conn = 1;
3782 cm_id->provider_data = iwqp;
3784 /* set up the connection params for the node */
3785 if (cm_id->remote_addr.ss_family == AF_INET) {
3786 cm_info.ipv4 = true;
3787 memset(cm_info.loc_addr, 0, sizeof(cm_info.loc_addr));
3788 memset(cm_info.rem_addr, 0, sizeof(cm_info.rem_addr));
3789 cm_info.loc_addr[0] = ntohl(laddr->sin_addr.s_addr);
3790 cm_info.rem_addr[0] = ntohl(raddr->sin_addr.s_addr);
3791 cm_info.loc_port = ntohs(laddr->sin_port);
3792 cm_info.rem_port = ntohs(raddr->sin_port);
3793 cm_info.vlan_id = i40iw_get_vlan_ipv4(cm_info.loc_addr);
3795 cm_info.ipv4 = false;
3796 i40iw_copy_ip_ntohl(cm_info.loc_addr,
3797 laddr6->sin6_addr.in6_u.u6_addr32);
3798 i40iw_copy_ip_ntohl(cm_info.rem_addr,
3799 raddr6->sin6_addr.in6_u.u6_addr32);
3800 cm_info.loc_port = ntohs(laddr6->sin6_port);
3801 cm_info.rem_port = ntohs(raddr6->sin6_port);
3802 i40iw_netdev_vlan_ipv6(cm_info.loc_addr, &cm_info.vlan_id, NULL);
3804 cm_info.cm_id = cm_id;
3805 if ((cm_info.ipv4 && (laddr->sin_addr.s_addr != raddr->sin_addr.s_addr)) ||
3806 (!cm_info.ipv4 && memcmp(laddr6->sin6_addr.in6_u.u6_addr32,
3807 raddr6->sin6_addr.in6_u.u6_addr32,
3808 sizeof(laddr6->sin6_addr.in6_u.u6_addr32)))) {
3809 status = i40iw_manage_qhash(iwdev,
3811 I40IW_QHASH_TYPE_TCP_ESTABLISHED,
3812 I40IW_QHASH_MANAGE_TYPE_ADD,
3818 status = i40iw_manage_apbvt(iwdev, cm_info.loc_port, I40IW_MANAGE_APBVT_ADD);
3820 i40iw_manage_qhash(iwdev,
3822 I40IW_QHASH_TYPE_TCP_ESTABLISHED,
3823 I40IW_QHASH_MANAGE_TYPE_DELETE,
3830 cm_id->add_ref(cm_id);
3831 cm_node = i40iw_create_cm_node(&iwdev->cm_core, iwdev,
3832 conn_param->private_data_len,
3833 (void *)conn_param->private_data,
3836 i40iw_manage_qhash(iwdev,
3838 I40IW_QHASH_TYPE_TCP_ESTABLISHED,
3839 I40IW_QHASH_MANAGE_TYPE_DELETE,
3843 if (apbvt_set && !i40iw_listen_port_in_use(&iwdev->cm_core,
3845 i40iw_manage_apbvt(iwdev,
3847 I40IW_MANAGE_APBVT_DEL);
3848 cm_id->rem_ref(cm_id);
3849 iwdev->cm_core.stats_connect_errs++;
3853 i40iw_record_ird_ord(cm_node, (u16)conn_param->ird, (u16)conn_param->ord);
3854 if (cm_node->send_rdma0_op == SEND_RDMA_READ_ZERO &&
3856 cm_node->ord_size = 1;
3858 cm_node->apbvt_set = apbvt_set;
3859 cm_node->qhash_set = true;
3860 iwqp->cm_node = cm_node;
3861 cm_node->iwqp = iwqp;
3862 iwqp->cm_id = cm_id;
3863 i40iw_add_ref(&iwqp->ibqp);
3868 * i40iw_create_listen - registered call creating listener
3869 * @cm_id: cm information for passive connection
3870 * @backlog: to max accept pending count
3872 int i40iw_create_listen(struct iw_cm_id *cm_id, int backlog)
3874 struct i40iw_device *iwdev;
3875 struct i40iw_cm_listener *cm_listen_node;
3876 struct i40iw_cm_info cm_info;
3877 enum i40iw_status_code ret;
3878 struct sockaddr_in *laddr;
3879 struct sockaddr_in6 *laddr6;
3880 bool wildcard = false;
3882 iwdev = to_iwdev(cm_id->device);
3886 laddr = (struct sockaddr_in *)&cm_id->m_local_addr;
3887 laddr6 = (struct sockaddr_in6 *)&cm_id->m_local_addr;
3888 memset(&cm_info, 0, sizeof(cm_info));
3889 if (laddr->sin_family == AF_INET) {
3890 cm_info.ipv4 = true;
3891 cm_info.loc_addr[0] = ntohl(laddr->sin_addr.s_addr);
3892 cm_info.loc_port = ntohs(laddr->sin_port);
3894 if (laddr->sin_addr.s_addr != INADDR_ANY)
3895 cm_info.vlan_id = i40iw_get_vlan_ipv4(cm_info.loc_addr);
3900 cm_info.ipv4 = false;
3901 i40iw_copy_ip_ntohl(cm_info.loc_addr,
3902 laddr6->sin6_addr.in6_u.u6_addr32);
3903 cm_info.loc_port = ntohs(laddr6->sin6_port);
3904 if (ipv6_addr_type(&laddr6->sin6_addr) != IPV6_ADDR_ANY)
3905 i40iw_netdev_vlan_ipv6(cm_info.loc_addr,
3911 cm_info.backlog = backlog;
3912 cm_info.cm_id = cm_id;
3914 cm_listen_node = i40iw_make_listen_node(&iwdev->cm_core, iwdev, &cm_info);
3915 if (!cm_listen_node) {
3916 i40iw_pr_err("cm_listen_node == NULL\n");
3920 cm_id->provider_data = cm_listen_node;
3922 if (!cm_listen_node->reused_node) {
3925 ret = i40iw_add_mqh_4(iwdev,
3929 ret = i40iw_add_mqh_6(iwdev,
3935 ret = i40iw_manage_apbvt(iwdev,
3937 I40IW_MANAGE_APBVT_ADD);
3942 ret = i40iw_manage_qhash(iwdev,
3944 I40IW_QHASH_TYPE_TCP_SYN,
3945 I40IW_QHASH_MANAGE_TYPE_ADD,
3950 cm_listen_node->qhash_set = true;
3951 ret = i40iw_manage_apbvt(iwdev,
3953 I40IW_MANAGE_APBVT_ADD);
3958 cm_id->add_ref(cm_id);
3959 cm_listen_node->cm_core->stats_listen_created++;
3962 i40iw_cm_del_listen(&iwdev->cm_core, (void *)cm_listen_node, false);
3967 * i40iw_destroy_listen - registered call to destroy listener
3968 * @cm_id: cm information for passive connection
3970 int i40iw_destroy_listen(struct iw_cm_id *cm_id)
3972 struct i40iw_device *iwdev;
3974 iwdev = to_iwdev(cm_id->device);
3975 if (cm_id->provider_data)
3976 i40iw_cm_del_listen(&iwdev->cm_core, cm_id->provider_data, true);
3978 i40iw_pr_err("cm_id->provider_data was NULL\n");
3980 cm_id->rem_ref(cm_id);
3986 * i40iw_cm_event_connected - handle connected active node
3987 * @event: the info for cm_node of connection
3989 static void i40iw_cm_event_connected(struct i40iw_cm_event *event)
3991 struct i40iw_qp *iwqp;
3992 struct i40iw_device *iwdev;
3993 struct i40iw_cm_node *cm_node;
3994 struct i40iw_sc_dev *dev;
3995 struct ib_qp_attr attr;
3996 struct iw_cm_id *cm_id;
4000 cm_node = event->cm_node;
4001 cm_id = cm_node->cm_id;
4002 iwqp = (struct i40iw_qp *)cm_id->provider_data;
4003 iwdev = to_iwdev(iwqp->ibqp.device);
4004 dev = &iwdev->sc_dev;
4006 if (iwqp->destroyed) {
4007 status = -ETIMEDOUT;
4010 i40iw_cm_init_tsa_conn(iwqp, cm_node);
4011 read0 = (cm_node->send_rdma0_op == SEND_RDMA_READ_ZERO);
4013 iwqp->sc_qp.qp_uk.sq_base = kmap(iwqp->page);
4014 dev->iw_priv_qp_ops->qp_send_rtt(&iwqp->sc_qp, read0);
4017 status = i40iw_send_cm_event(cm_node, cm_id, IW_CM_EVENT_CONNECT_REPLY, 0);
4019 i40iw_pr_err("send cm event\n");
4021 memset(&attr, 0, sizeof(attr));
4022 attr.qp_state = IB_QPS_RTS;
4023 cm_node->qhash_set = false;
4024 i40iw_modify_qp(&iwqp->ibqp, &attr, IB_QP_STATE, NULL);
4026 cm_node->accelerated = 1;
4027 if (cm_node->accept_pend) {
4028 if (!cm_node->listener)
4029 i40iw_pr_err("listener is null for passive node\n");
4030 atomic_dec(&cm_node->listener->pend_accepts_cnt);
4031 cm_node->accept_pend = 0;
4037 cm_id->provider_data = NULL;
4038 i40iw_send_cm_event(event->cm_node,
4040 IW_CM_EVENT_CONNECT_REPLY,
4042 cm_id->rem_ref(cm_id);
4043 i40iw_rem_ref_cm_node(event->cm_node);
4047 * i40iw_cm_event_reset - handle reset
4048 * @event: the info for cm_node of connection
4050 static void i40iw_cm_event_reset(struct i40iw_cm_event *event)
4052 struct i40iw_cm_node *cm_node = event->cm_node;
4053 struct iw_cm_id *cm_id = cm_node->cm_id;
4054 struct i40iw_qp *iwqp;
4059 iwqp = cm_id->provider_data;
4063 i40iw_debug(cm_node->dev,
4065 "reset event %p - cm_id = %p\n",
4066 event->cm_node, cm_id);
4069 i40iw_send_cm_event(cm_node, cm_node->cm_id, IW_CM_EVENT_DISCONNECT, -ECONNRESET);
4070 i40iw_send_cm_event(cm_node, cm_node->cm_id, IW_CM_EVENT_CLOSE, 0);
4074 * i40iw_cm_event_handler - worker thread callback to send event to cm upper layer
4075 * @work: pointer of cm event info.
4077 static void i40iw_cm_event_handler(struct work_struct *work)
4079 struct i40iw_cm_event *event = container_of(work,
4080 struct i40iw_cm_event,
4082 struct i40iw_cm_node *cm_node;
4084 if (!event || !event->cm_node || !event->cm_node->cm_core)
4087 cm_node = event->cm_node;
4089 switch (event->type) {
4090 case I40IW_CM_EVENT_MPA_REQ:
4091 i40iw_send_cm_event(cm_node,
4093 IW_CM_EVENT_CONNECT_REQUEST,
4096 case I40IW_CM_EVENT_RESET:
4097 i40iw_cm_event_reset(event);
4099 case I40IW_CM_EVENT_CONNECTED:
4100 if (!event->cm_node->cm_id ||
4101 (event->cm_node->state != I40IW_CM_STATE_OFFLOADED))
4103 i40iw_cm_event_connected(event);
4105 case I40IW_CM_EVENT_MPA_REJECT:
4106 if (!event->cm_node->cm_id ||
4107 (cm_node->state == I40IW_CM_STATE_OFFLOADED))
4109 i40iw_send_cm_event(cm_node,
4111 IW_CM_EVENT_CONNECT_REPLY,
4114 case I40IW_CM_EVENT_ABORTED:
4115 if (!event->cm_node->cm_id ||
4116 (event->cm_node->state == I40IW_CM_STATE_OFFLOADED))
4118 i40iw_event_connect_error(event);
4121 i40iw_pr_err("event type = %d\n", event->type);
4125 event->cm_info.cm_id->rem_ref(event->cm_info.cm_id);
4126 i40iw_rem_ref_cm_node(event->cm_node);
4131 * i40iw_cm_post_event - queue event request for worker thread
4132 * @event: cm node's info for up event call
4134 static void i40iw_cm_post_event(struct i40iw_cm_event *event)
4136 atomic_inc(&event->cm_node->ref_count);
4137 event->cm_info.cm_id->add_ref(event->cm_info.cm_id);
4138 INIT_WORK(&event->event_work, i40iw_cm_event_handler);
4140 queue_work(event->cm_node->cm_core->event_wq, &event->event_work);