2 * Copyright (c) 2009-2010 Chelsio, Inc. All rights reserved.
4 * This software is available to you under a choice of one of two
5 * licenses. You may choose to be licensed under the terms of the GNU
6 * General Public License (GPL) Version 2, available from the file
7 * COPYING in the main directory of this source tree, or the
8 * OpenIB.org BSD license below:
10 * Redistribution and use in source and binary forms, with or
11 * without modification, are permitted provided that the following
14 * - Redistributions of source code must retain the above
15 * copyright notice, this list of conditions and the following
18 * - Redistributions in binary form must reproduce the above
19 * copyright notice, this list of conditions and the following
20 * disclaimer in the documentation and/or other materials
21 * provided with the distribution.
23 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
24 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
25 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
26 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
27 * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
28 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
29 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
32 #include <linux/module.h>
33 #include <linux/list.h>
34 #include <linux/workqueue.h>
35 #include <linux/skbuff.h>
36 #include <linux/timer.h>
37 #include <linux/notifier.h>
38 #include <linux/inetdevice.h>
40 #include <linux/tcp.h>
41 #include <linux/if_vlan.h>
43 #include <net/neighbour.h>
44 #include <net/netevent.h>
45 #include <net/route.h>
47 #include <net/ip6_route.h>
48 #include <net/addrconf.h>
52 static char *states[] = {
69 module_param(nocong, int, 0644);
70 MODULE_PARM_DESC(nocong, "Turn of congestion control (default=0)");
72 static int enable_ecn;
73 module_param(enable_ecn, int, 0644);
74 MODULE_PARM_DESC(enable_ecn, "Enable ECN (default=0/disabled)");
76 static int dack_mode = 1;
77 module_param(dack_mode, int, 0644);
78 MODULE_PARM_DESC(dack_mode, "Delayed ack mode (default=1)");
80 int c4iw_max_read_depth = 8;
81 module_param(c4iw_max_read_depth, int, 0644);
82 MODULE_PARM_DESC(c4iw_max_read_depth, "Per-connection max ORD/IRD (default=8)");
84 static int enable_tcp_timestamps;
85 module_param(enable_tcp_timestamps, int, 0644);
86 MODULE_PARM_DESC(enable_tcp_timestamps, "Enable tcp timestamps (default=0)");
88 static int enable_tcp_sack;
89 module_param(enable_tcp_sack, int, 0644);
90 MODULE_PARM_DESC(enable_tcp_sack, "Enable tcp SACK (default=0)");
92 static int enable_tcp_window_scaling = 1;
93 module_param(enable_tcp_window_scaling, int, 0644);
94 MODULE_PARM_DESC(enable_tcp_window_scaling,
95 "Enable tcp window scaling (default=1)");
98 module_param(c4iw_debug, int, 0644);
99 MODULE_PARM_DESC(c4iw_debug, "Enable debug logging (default=0)");
101 static int peer2peer = 1;
102 module_param(peer2peer, int, 0644);
103 MODULE_PARM_DESC(peer2peer, "Support peer2peer ULPs (default=1)");
105 static int p2p_type = FW_RI_INIT_P2PTYPE_READ_REQ;
106 module_param(p2p_type, int, 0644);
107 MODULE_PARM_DESC(p2p_type, "RDMAP opcode to use for the RTR message: "
108 "1=RDMA_READ 0=RDMA_WRITE (default 1)");
110 static int ep_timeout_secs = 60;
111 module_param(ep_timeout_secs, int, 0644);
112 MODULE_PARM_DESC(ep_timeout_secs, "CM Endpoint operation timeout "
113 "in seconds (default=60)");
115 static int mpa_rev = 1;
116 module_param(mpa_rev, int, 0644);
117 MODULE_PARM_DESC(mpa_rev, "MPA Revision, 0 supports amso1100, "
118 "1 is RFC0544 spec compliant, 2 is IETF MPA Peer Connect Draft"
119 " compliant (default=1)");
121 static int markers_enabled;
122 module_param(markers_enabled, int, 0644);
123 MODULE_PARM_DESC(markers_enabled, "Enable MPA MARKERS (default(0)=disabled)");
125 static int crc_enabled = 1;
126 module_param(crc_enabled, int, 0644);
127 MODULE_PARM_DESC(crc_enabled, "Enable MPA CRC (default(1)=enabled)");
129 static int rcv_win = 256 * 1024;
130 module_param(rcv_win, int, 0644);
131 MODULE_PARM_DESC(rcv_win, "TCP receive window in bytes (default=256KB)");
133 static int snd_win = 128 * 1024;
134 module_param(snd_win, int, 0644);
135 MODULE_PARM_DESC(snd_win, "TCP send window in bytes (default=128KB)");
137 static struct workqueue_struct *workq;
139 static struct sk_buff_head rxq;
141 static struct sk_buff *get_skb(struct sk_buff *skb, int len, gfp_t gfp);
142 static void ep_timeout(unsigned long arg);
143 static void connect_reply_upcall(struct c4iw_ep *ep, int status);
145 static LIST_HEAD(timeout_list);
146 static spinlock_t timeout_lock;
148 static void deref_qp(struct c4iw_ep *ep)
150 c4iw_qp_rem_ref(&ep->com.qp->ibqp);
151 clear_bit(QP_REFERENCED, &ep->com.flags);
154 static void ref_qp(struct c4iw_ep *ep)
156 set_bit(QP_REFERENCED, &ep->com.flags);
157 c4iw_qp_add_ref(&ep->com.qp->ibqp);
160 static void start_ep_timer(struct c4iw_ep *ep)
162 PDBG("%s ep %p\n", __func__, ep);
163 if (timer_pending(&ep->timer)) {
164 pr_err("%s timer already started! ep %p\n",
168 clear_bit(TIMEOUT, &ep->com.flags);
169 c4iw_get_ep(&ep->com);
170 ep->timer.expires = jiffies + ep_timeout_secs * HZ;
171 ep->timer.data = (unsigned long)ep;
172 ep->timer.function = ep_timeout;
173 add_timer(&ep->timer);
176 static void stop_ep_timer(struct c4iw_ep *ep)
178 PDBG("%s ep %p stopping\n", __func__, ep);
179 del_timer_sync(&ep->timer);
180 if (!test_and_set_bit(TIMEOUT, &ep->com.flags))
181 c4iw_put_ep(&ep->com);
184 static int c4iw_l2t_send(struct c4iw_rdev *rdev, struct sk_buff *skb,
185 struct l2t_entry *l2e)
189 if (c4iw_fatal_error(rdev)) {
191 PDBG("%s - device in error state - dropping\n", __func__);
194 error = cxgb4_l2t_send(rdev->lldi.ports[0], skb, l2e);
197 return error < 0 ? error : 0;
200 int c4iw_ofld_send(struct c4iw_rdev *rdev, struct sk_buff *skb)
204 if (c4iw_fatal_error(rdev)) {
206 PDBG("%s - device in error state - dropping\n", __func__);
209 error = cxgb4_ofld_send(rdev->lldi.ports[0], skb);
212 return error < 0 ? error : 0;
215 static void release_tid(struct c4iw_rdev *rdev, u32 hwtid, struct sk_buff *skb)
217 struct cpl_tid_release *req;
219 skb = get_skb(skb, sizeof *req, GFP_KERNEL);
222 req = (struct cpl_tid_release *) skb_put(skb, sizeof(*req));
223 INIT_TP_WR(req, hwtid);
224 OPCODE_TID(req) = cpu_to_be32(MK_OPCODE_TID(CPL_TID_RELEASE, hwtid));
225 set_wr_txq(skb, CPL_PRIORITY_SETUP, 0);
226 c4iw_ofld_send(rdev, skb);
230 static void set_emss(struct c4iw_ep *ep, u16 opt)
232 ep->emss = ep->com.dev->rdev.lldi.mtus[GET_TCPOPT_MSS(opt)] - 40;
234 if (GET_TCPOPT_TSTAMP(opt))
238 PDBG("%s mss_idx %u mss %u emss=%u\n", __func__, GET_TCPOPT_MSS(opt),
242 static enum c4iw_ep_state state_read(struct c4iw_ep_common *epc)
244 enum c4iw_ep_state state;
246 mutex_lock(&epc->mutex);
248 mutex_unlock(&epc->mutex);
252 static void __state_set(struct c4iw_ep_common *epc, enum c4iw_ep_state new)
257 static void state_set(struct c4iw_ep_common *epc, enum c4iw_ep_state new)
259 mutex_lock(&epc->mutex);
260 PDBG("%s - %s -> %s\n", __func__, states[epc->state], states[new]);
261 __state_set(epc, new);
262 mutex_unlock(&epc->mutex);
266 static void *alloc_ep(int size, gfp_t gfp)
268 struct c4iw_ep_common *epc;
270 epc = kzalloc(size, gfp);
272 kref_init(&epc->kref);
273 mutex_init(&epc->mutex);
274 c4iw_init_wr_wait(&epc->wr_wait);
276 PDBG("%s alloc ep %p\n", __func__, epc);
280 void _c4iw_free_ep(struct kref *kref)
284 ep = container_of(kref, struct c4iw_ep, com.kref);
285 PDBG("%s ep %p state %s\n", __func__, ep, states[state_read(&ep->com)]);
286 if (test_bit(QP_REFERENCED, &ep->com.flags))
288 if (test_bit(RELEASE_RESOURCES, &ep->com.flags)) {
289 remove_handle(ep->com.dev, &ep->com.dev->hwtid_idr, ep->hwtid);
290 cxgb4_remove_tid(ep->com.dev->rdev.lldi.tids, 0, ep->hwtid);
291 dst_release(ep->dst);
292 cxgb4_l2t_release(ep->l2t);
297 static void release_ep_resources(struct c4iw_ep *ep)
299 set_bit(RELEASE_RESOURCES, &ep->com.flags);
300 c4iw_put_ep(&ep->com);
303 static int status2errno(int status)
308 case CPL_ERR_CONN_RESET:
310 case CPL_ERR_ARP_MISS:
311 return -EHOSTUNREACH;
312 case CPL_ERR_CONN_TIMEDOUT:
314 case CPL_ERR_TCAM_FULL:
316 case CPL_ERR_CONN_EXIST:
324 * Try and reuse skbs already allocated...
326 static struct sk_buff *get_skb(struct sk_buff *skb, int len, gfp_t gfp)
328 if (skb && !skb_is_nonlinear(skb) && !skb_cloned(skb)) {
331 skb_reset_transport_header(skb);
333 skb = alloc_skb(len, gfp);
335 t4_set_arp_err_handler(skb, NULL, NULL);
339 static struct net_device *get_real_dev(struct net_device *egress_dev)
341 struct net_device *phys_dev = egress_dev;
342 if (egress_dev->priv_flags & IFF_802_1Q_VLAN)
343 phys_dev = vlan_dev_real_dev(egress_dev);
347 static int our_interface(struct c4iw_dev *dev, struct net_device *egress_dev)
351 egress_dev = get_real_dev(egress_dev);
352 for (i = 0; i < dev->rdev.lldi.nports; i++)
353 if (dev->rdev.lldi.ports[i] == egress_dev)
358 static struct dst_entry *find_route6(struct c4iw_dev *dev, __u8 *local_ip,
359 __u8 *peer_ip, __be16 local_port,
360 __be16 peer_port, u8 tos,
363 struct dst_entry *dst = NULL;
365 if (IS_ENABLED(CONFIG_IPV6)) {
368 memset(&fl6, 0, sizeof(fl6));
369 memcpy(&fl6.daddr, peer_ip, 16);
370 memcpy(&fl6.saddr, local_ip, 16);
371 if (ipv6_addr_type(&fl6.daddr) & IPV6_ADDR_LINKLOCAL)
372 fl6.flowi6_oif = sin6_scope_id;
373 dst = ip6_route_output(&init_net, NULL, &fl6);
376 if (!our_interface(dev, ip6_dst_idev(dst)->dev) &&
377 !(ip6_dst_idev(dst)->dev->flags & IFF_LOOPBACK)) {
387 static struct dst_entry *find_route(struct c4iw_dev *dev, __be32 local_ip,
388 __be32 peer_ip, __be16 local_port,
389 __be16 peer_port, u8 tos)
395 rt = ip_route_output_ports(&init_net, &fl4, NULL, peer_ip, local_ip,
396 peer_port, local_port, IPPROTO_TCP,
400 n = dst_neigh_lookup(&rt->dst, &peer_ip);
403 if (!our_interface(dev, n->dev) &&
404 !(n->dev->flags & IFF_LOOPBACK)) {
405 dst_release(&rt->dst);
412 static void arp_failure_discard(void *handle, struct sk_buff *skb)
414 PDBG("%s c4iw_dev %p\n", __func__, handle);
419 * Handle an ARP failure for an active open.
421 static void act_open_req_arp_failure(void *handle, struct sk_buff *skb)
423 printk(KERN_ERR MOD "ARP failure duing connect\n");
428 * Handle an ARP failure for a CPL_ABORT_REQ. Change it into a no RST variant
431 static void abort_arp_failure(void *handle, struct sk_buff *skb)
433 struct c4iw_rdev *rdev = handle;
434 struct cpl_abort_req *req = cplhdr(skb);
436 PDBG("%s rdev %p\n", __func__, rdev);
437 req->cmd = CPL_ABORT_NO_RST;
438 c4iw_ofld_send(rdev, skb);
441 static void send_flowc(struct c4iw_ep *ep, struct sk_buff *skb)
443 unsigned int flowclen = 80;
444 struct fw_flowc_wr *flowc;
447 skb = get_skb(skb, flowclen, GFP_KERNEL);
448 flowc = (struct fw_flowc_wr *)__skb_put(skb, flowclen);
450 flowc->op_to_nparams = cpu_to_be32(FW_WR_OP(FW_FLOWC_WR) |
451 FW_FLOWC_WR_NPARAMS(8));
452 flowc->flowid_len16 = cpu_to_be32(FW_WR_LEN16(DIV_ROUND_UP(flowclen,
453 16)) | FW_WR_FLOWID(ep->hwtid));
455 flowc->mnemval[0].mnemonic = FW_FLOWC_MNEM_PFNVFN;
456 flowc->mnemval[0].val = cpu_to_be32(PCI_FUNC(ep->com.dev->rdev.lldi.pdev->devfn) << 8);
457 flowc->mnemval[1].mnemonic = FW_FLOWC_MNEM_CH;
458 flowc->mnemval[1].val = cpu_to_be32(ep->tx_chan);
459 flowc->mnemval[2].mnemonic = FW_FLOWC_MNEM_PORT;
460 flowc->mnemval[2].val = cpu_to_be32(ep->tx_chan);
461 flowc->mnemval[3].mnemonic = FW_FLOWC_MNEM_IQID;
462 flowc->mnemval[3].val = cpu_to_be32(ep->rss_qid);
463 flowc->mnemval[4].mnemonic = FW_FLOWC_MNEM_SNDNXT;
464 flowc->mnemval[4].val = cpu_to_be32(ep->snd_seq);
465 flowc->mnemval[5].mnemonic = FW_FLOWC_MNEM_RCVNXT;
466 flowc->mnemval[5].val = cpu_to_be32(ep->rcv_seq);
467 flowc->mnemval[6].mnemonic = FW_FLOWC_MNEM_SNDBUF;
468 flowc->mnemval[6].val = cpu_to_be32(snd_win);
469 flowc->mnemval[7].mnemonic = FW_FLOWC_MNEM_MSS;
470 flowc->mnemval[7].val = cpu_to_be32(ep->emss);
471 /* Pad WR to 16 byte boundary */
472 flowc->mnemval[8].mnemonic = 0;
473 flowc->mnemval[8].val = 0;
474 for (i = 0; i < 9; i++) {
475 flowc->mnemval[i].r4[0] = 0;
476 flowc->mnemval[i].r4[1] = 0;
477 flowc->mnemval[i].r4[2] = 0;
480 set_wr_txq(skb, CPL_PRIORITY_DATA, ep->txq_idx);
481 c4iw_ofld_send(&ep->com.dev->rdev, skb);
484 static int send_halfclose(struct c4iw_ep *ep, gfp_t gfp)
486 struct cpl_close_con_req *req;
488 int wrlen = roundup(sizeof *req, 16);
490 PDBG("%s ep %p tid %u\n", __func__, ep, ep->hwtid);
491 skb = get_skb(NULL, wrlen, gfp);
493 printk(KERN_ERR MOD "%s - failed to alloc skb\n", __func__);
496 set_wr_txq(skb, CPL_PRIORITY_DATA, ep->txq_idx);
497 t4_set_arp_err_handler(skb, NULL, arp_failure_discard);
498 req = (struct cpl_close_con_req *) skb_put(skb, wrlen);
499 memset(req, 0, wrlen);
500 INIT_TP_WR(req, ep->hwtid);
501 OPCODE_TID(req) = cpu_to_be32(MK_OPCODE_TID(CPL_CLOSE_CON_REQ,
503 return c4iw_l2t_send(&ep->com.dev->rdev, skb, ep->l2t);
506 static int send_abort(struct c4iw_ep *ep, struct sk_buff *skb, gfp_t gfp)
508 struct cpl_abort_req *req;
509 int wrlen = roundup(sizeof *req, 16);
511 PDBG("%s ep %p tid %u\n", __func__, ep, ep->hwtid);
512 skb = get_skb(skb, wrlen, gfp);
514 printk(KERN_ERR MOD "%s - failed to alloc skb.\n",
518 set_wr_txq(skb, CPL_PRIORITY_DATA, ep->txq_idx);
519 t4_set_arp_err_handler(skb, &ep->com.dev->rdev, abort_arp_failure);
520 req = (struct cpl_abort_req *) skb_put(skb, wrlen);
521 memset(req, 0, wrlen);
522 INIT_TP_WR(req, ep->hwtid);
523 OPCODE_TID(req) = cpu_to_be32(MK_OPCODE_TID(CPL_ABORT_REQ, ep->hwtid));
524 req->cmd = CPL_ABORT_SEND_RST;
525 return c4iw_l2t_send(&ep->com.dev->rdev, skb, ep->l2t);
528 static int send_connect(struct c4iw_ep *ep)
530 struct cpl_act_open_req *req;
531 struct cpl_t5_act_open_req *t5_req;
532 struct cpl_act_open_req6 *req6;
533 struct cpl_t5_act_open_req6 *t5_req6;
537 unsigned int mtu_idx;
540 int sizev4 = is_t4(ep->com.dev->rdev.lldi.adapter_type) ?
541 sizeof(struct cpl_act_open_req) :
542 sizeof(struct cpl_t5_act_open_req);
543 int sizev6 = is_t4(ep->com.dev->rdev.lldi.adapter_type) ?
544 sizeof(struct cpl_act_open_req6) :
545 sizeof(struct cpl_t5_act_open_req6);
546 struct sockaddr_in *la = (struct sockaddr_in *)&ep->com.local_addr;
547 struct sockaddr_in *ra = (struct sockaddr_in *)&ep->com.remote_addr;
548 struct sockaddr_in6 *la6 = (struct sockaddr_in6 *)&ep->com.local_addr;
549 struct sockaddr_in6 *ra6 = (struct sockaddr_in6 *)&ep->com.remote_addr;
551 wrlen = (ep->com.remote_addr.ss_family == AF_INET) ?
552 roundup(sizev4, 16) :
555 PDBG("%s ep %p atid %u\n", __func__, ep, ep->atid);
557 skb = get_skb(NULL, wrlen, GFP_KERNEL);
559 printk(KERN_ERR MOD "%s - failed to alloc skb.\n",
563 set_wr_txq(skb, CPL_PRIORITY_SETUP, ep->ctrlq_idx);
565 cxgb4_best_mtu(ep->com.dev->rdev.lldi.mtus, ep->mtu, &mtu_idx);
566 wscale = compute_wscale(rcv_win);
567 opt0 = (nocong ? NO_CONG(1) : 0) |
572 L2T_IDX(ep->l2t->idx) |
573 TX_CHAN(ep->tx_chan) |
574 SMAC_SEL(ep->smac_idx) |
576 ULP_MODE(ULP_MODE_TCPDDP) |
577 RCV_BUFSIZ(rcv_win>>10);
578 opt2 = RX_CHANNEL(0) |
579 CCTRL_ECN(enable_ecn) |
580 RSS_QUEUE_VALID | RSS_QUEUE(ep->rss_qid);
581 if (enable_tcp_timestamps)
582 opt2 |= TSTAMPS_EN(1);
585 if (wscale && enable_tcp_window_scaling)
586 opt2 |= WND_SCALE_EN(1);
587 t4_set_arp_err_handler(skb, NULL, act_open_req_arp_failure);
589 if (is_t4(ep->com.dev->rdev.lldi.adapter_type)) {
590 if (ep->com.remote_addr.ss_family == AF_INET) {
591 req = (struct cpl_act_open_req *) skb_put(skb, wrlen);
593 OPCODE_TID(req) = cpu_to_be32(
594 MK_OPCODE_TID(CPL_ACT_OPEN_REQ,
595 ((ep->rss_qid << 14) | ep->atid)));
596 req->local_port = la->sin_port;
597 req->peer_port = ra->sin_port;
598 req->local_ip = la->sin_addr.s_addr;
599 req->peer_ip = ra->sin_addr.s_addr;
600 req->opt0 = cpu_to_be64(opt0);
601 req->params = cpu_to_be32(cxgb4_select_ntuple(
602 ep->com.dev->rdev.lldi.ports[0],
604 req->opt2 = cpu_to_be32(opt2);
606 req6 = (struct cpl_act_open_req6 *)skb_put(skb, wrlen);
609 OPCODE_TID(req6) = cpu_to_be32(
610 MK_OPCODE_TID(CPL_ACT_OPEN_REQ6,
611 ((ep->rss_qid<<14)|ep->atid)));
612 req6->local_port = la6->sin6_port;
613 req6->peer_port = ra6->sin6_port;
614 req6->local_ip_hi = *((__be64 *)
615 (la6->sin6_addr.s6_addr));
616 req6->local_ip_lo = *((__be64 *)
617 (la6->sin6_addr.s6_addr + 8));
618 req6->peer_ip_hi = *((__be64 *)
619 (ra6->sin6_addr.s6_addr));
620 req6->peer_ip_lo = *((__be64 *)
621 (ra6->sin6_addr.s6_addr + 8));
622 req6->opt0 = cpu_to_be64(opt0);
623 req6->params = cpu_to_be32(cxgb4_select_ntuple(
624 ep->com.dev->rdev.lldi.ports[0],
626 req6->opt2 = cpu_to_be32(opt2);
629 if (ep->com.remote_addr.ss_family == AF_INET) {
630 t5_req = (struct cpl_t5_act_open_req *)
632 INIT_TP_WR(t5_req, 0);
633 OPCODE_TID(t5_req) = cpu_to_be32(
634 MK_OPCODE_TID(CPL_ACT_OPEN_REQ,
635 ((ep->rss_qid << 14) | ep->atid)));
636 t5_req->local_port = la->sin_port;
637 t5_req->peer_port = ra->sin_port;
638 t5_req->local_ip = la->sin_addr.s_addr;
639 t5_req->peer_ip = ra->sin_addr.s_addr;
640 t5_req->opt0 = cpu_to_be64(opt0);
641 t5_req->params = cpu_to_be64(V_FILTER_TUPLE(
643 ep->com.dev->rdev.lldi.ports[0],
645 t5_req->opt2 = cpu_to_be32(opt2);
647 t5_req6 = (struct cpl_t5_act_open_req6 *)
649 INIT_TP_WR(t5_req6, 0);
650 OPCODE_TID(t5_req6) = cpu_to_be32(
651 MK_OPCODE_TID(CPL_ACT_OPEN_REQ6,
652 ((ep->rss_qid<<14)|ep->atid)));
653 t5_req6->local_port = la6->sin6_port;
654 t5_req6->peer_port = ra6->sin6_port;
655 t5_req6->local_ip_hi = *((__be64 *)
656 (la6->sin6_addr.s6_addr));
657 t5_req6->local_ip_lo = *((__be64 *)
658 (la6->sin6_addr.s6_addr + 8));
659 t5_req6->peer_ip_hi = *((__be64 *)
660 (ra6->sin6_addr.s6_addr));
661 t5_req6->peer_ip_lo = *((__be64 *)
662 (ra6->sin6_addr.s6_addr + 8));
663 t5_req6->opt0 = cpu_to_be64(opt0);
664 t5_req6->params = (__force __be64)cpu_to_be32(
666 ep->com.dev->rdev.lldi.ports[0],
668 t5_req6->opt2 = cpu_to_be32(opt2);
672 set_bit(ACT_OPEN_REQ, &ep->com.history);
673 return c4iw_l2t_send(&ep->com.dev->rdev, skb, ep->l2t);
676 static void send_mpa_req(struct c4iw_ep *ep, struct sk_buff *skb,
680 struct fw_ofld_tx_data_wr *req;
681 struct mpa_message *mpa;
682 struct mpa_v2_conn_params mpa_v2_params;
684 PDBG("%s ep %p tid %u pd_len %d\n", __func__, ep, ep->hwtid, ep->plen);
686 BUG_ON(skb_cloned(skb));
688 mpalen = sizeof(*mpa) + ep->plen;
689 if (mpa_rev_to_use == 2)
690 mpalen += sizeof(struct mpa_v2_conn_params);
691 wrlen = roundup(mpalen + sizeof *req, 16);
692 skb = get_skb(skb, wrlen, GFP_KERNEL);
694 connect_reply_upcall(ep, -ENOMEM);
697 set_wr_txq(skb, CPL_PRIORITY_DATA, ep->txq_idx);
699 req = (struct fw_ofld_tx_data_wr *)skb_put(skb, wrlen);
700 memset(req, 0, wrlen);
701 req->op_to_immdlen = cpu_to_be32(
702 FW_WR_OP(FW_OFLD_TX_DATA_WR) |
704 FW_WR_IMMDLEN(mpalen));
705 req->flowid_len16 = cpu_to_be32(
706 FW_WR_FLOWID(ep->hwtid) |
707 FW_WR_LEN16(wrlen >> 4));
708 req->plen = cpu_to_be32(mpalen);
709 req->tunnel_to_proxy = cpu_to_be32(
710 FW_OFLD_TX_DATA_WR_FLUSH(1) |
711 FW_OFLD_TX_DATA_WR_SHOVE(1));
713 mpa = (struct mpa_message *)(req + 1);
714 memcpy(mpa->key, MPA_KEY_REQ, sizeof(mpa->key));
715 mpa->flags = (crc_enabled ? MPA_CRC : 0) |
716 (markers_enabled ? MPA_MARKERS : 0) |
717 (mpa_rev_to_use == 2 ? MPA_ENHANCED_RDMA_CONN : 0);
718 mpa->private_data_size = htons(ep->plen);
719 mpa->revision = mpa_rev_to_use;
720 if (mpa_rev_to_use == 1) {
721 ep->tried_with_mpa_v1 = 1;
722 ep->retry_with_mpa_v1 = 0;
725 if (mpa_rev_to_use == 2) {
726 mpa->private_data_size = htons(ntohs(mpa->private_data_size) +
727 sizeof (struct mpa_v2_conn_params));
728 mpa_v2_params.ird = htons((u16)ep->ird);
729 mpa_v2_params.ord = htons((u16)ep->ord);
732 mpa_v2_params.ird |= htons(MPA_V2_PEER2PEER_MODEL);
733 if (p2p_type == FW_RI_INIT_P2PTYPE_RDMA_WRITE)
735 htons(MPA_V2_RDMA_WRITE_RTR);
736 else if (p2p_type == FW_RI_INIT_P2PTYPE_READ_REQ)
738 htons(MPA_V2_RDMA_READ_RTR);
740 memcpy(mpa->private_data, &mpa_v2_params,
741 sizeof(struct mpa_v2_conn_params));
744 memcpy(mpa->private_data +
745 sizeof(struct mpa_v2_conn_params),
746 ep->mpa_pkt + sizeof(*mpa), ep->plen);
749 memcpy(mpa->private_data,
750 ep->mpa_pkt + sizeof(*mpa), ep->plen);
753 * Reference the mpa skb. This ensures the data area
754 * will remain in memory until the hw acks the tx.
755 * Function fw4_ack() will deref it.
758 t4_set_arp_err_handler(skb, NULL, arp_failure_discard);
761 c4iw_l2t_send(&ep->com.dev->rdev, skb, ep->l2t);
763 __state_set(&ep->com, MPA_REQ_SENT);
764 ep->mpa_attr.initiator = 1;
765 ep->snd_seq += mpalen;
769 static int send_mpa_reject(struct c4iw_ep *ep, const void *pdata, u8 plen)
772 struct fw_ofld_tx_data_wr *req;
773 struct mpa_message *mpa;
775 struct mpa_v2_conn_params mpa_v2_params;
777 PDBG("%s ep %p tid %u pd_len %d\n", __func__, ep, ep->hwtid, ep->plen);
779 mpalen = sizeof(*mpa) + plen;
780 if (ep->mpa_attr.version == 2 && ep->mpa_attr.enhanced_rdma_conn)
781 mpalen += sizeof(struct mpa_v2_conn_params);
782 wrlen = roundup(mpalen + sizeof *req, 16);
784 skb = get_skb(NULL, wrlen, GFP_KERNEL);
786 printk(KERN_ERR MOD "%s - cannot alloc skb!\n", __func__);
789 set_wr_txq(skb, CPL_PRIORITY_DATA, ep->txq_idx);
791 req = (struct fw_ofld_tx_data_wr *)skb_put(skb, wrlen);
792 memset(req, 0, wrlen);
793 req->op_to_immdlen = cpu_to_be32(
794 FW_WR_OP(FW_OFLD_TX_DATA_WR) |
796 FW_WR_IMMDLEN(mpalen));
797 req->flowid_len16 = cpu_to_be32(
798 FW_WR_FLOWID(ep->hwtid) |
799 FW_WR_LEN16(wrlen >> 4));
800 req->plen = cpu_to_be32(mpalen);
801 req->tunnel_to_proxy = cpu_to_be32(
802 FW_OFLD_TX_DATA_WR_FLUSH(1) |
803 FW_OFLD_TX_DATA_WR_SHOVE(1));
805 mpa = (struct mpa_message *)(req + 1);
806 memset(mpa, 0, sizeof(*mpa));
807 memcpy(mpa->key, MPA_KEY_REP, sizeof(mpa->key));
808 mpa->flags = MPA_REJECT;
809 mpa->revision = ep->mpa_attr.version;
810 mpa->private_data_size = htons(plen);
812 if (ep->mpa_attr.version == 2 && ep->mpa_attr.enhanced_rdma_conn) {
813 mpa->flags |= MPA_ENHANCED_RDMA_CONN;
814 mpa->private_data_size = htons(ntohs(mpa->private_data_size) +
815 sizeof (struct mpa_v2_conn_params));
816 mpa_v2_params.ird = htons(((u16)ep->ird) |
817 (peer2peer ? MPA_V2_PEER2PEER_MODEL :
819 mpa_v2_params.ord = htons(((u16)ep->ord) | (peer2peer ?
821 FW_RI_INIT_P2PTYPE_RDMA_WRITE ?
822 MPA_V2_RDMA_WRITE_RTR : p2p_type ==
823 FW_RI_INIT_P2PTYPE_READ_REQ ?
824 MPA_V2_RDMA_READ_RTR : 0) : 0));
825 memcpy(mpa->private_data, &mpa_v2_params,
826 sizeof(struct mpa_v2_conn_params));
829 memcpy(mpa->private_data +
830 sizeof(struct mpa_v2_conn_params), pdata, plen);
833 memcpy(mpa->private_data, pdata, plen);
836 * Reference the mpa skb again. This ensures the data area
837 * will remain in memory until the hw acks the tx.
838 * Function fw4_ack() will deref it.
841 set_wr_txq(skb, CPL_PRIORITY_DATA, ep->txq_idx);
842 t4_set_arp_err_handler(skb, NULL, arp_failure_discard);
845 ep->snd_seq += mpalen;
846 return c4iw_l2t_send(&ep->com.dev->rdev, skb, ep->l2t);
849 static int send_mpa_reply(struct c4iw_ep *ep, const void *pdata, u8 plen)
852 struct fw_ofld_tx_data_wr *req;
853 struct mpa_message *mpa;
855 struct mpa_v2_conn_params mpa_v2_params;
857 PDBG("%s ep %p tid %u pd_len %d\n", __func__, ep, ep->hwtid, ep->plen);
859 mpalen = sizeof(*mpa) + plen;
860 if (ep->mpa_attr.version == 2 && ep->mpa_attr.enhanced_rdma_conn)
861 mpalen += sizeof(struct mpa_v2_conn_params);
862 wrlen = roundup(mpalen + sizeof *req, 16);
864 skb = get_skb(NULL, wrlen, GFP_KERNEL);
866 printk(KERN_ERR MOD "%s - cannot alloc skb!\n", __func__);
869 set_wr_txq(skb, CPL_PRIORITY_DATA, ep->txq_idx);
871 req = (struct fw_ofld_tx_data_wr *) skb_put(skb, wrlen);
872 memset(req, 0, wrlen);
873 req->op_to_immdlen = cpu_to_be32(
874 FW_WR_OP(FW_OFLD_TX_DATA_WR) |
876 FW_WR_IMMDLEN(mpalen));
877 req->flowid_len16 = cpu_to_be32(
878 FW_WR_FLOWID(ep->hwtid) |
879 FW_WR_LEN16(wrlen >> 4));
880 req->plen = cpu_to_be32(mpalen);
881 req->tunnel_to_proxy = cpu_to_be32(
882 FW_OFLD_TX_DATA_WR_FLUSH(1) |
883 FW_OFLD_TX_DATA_WR_SHOVE(1));
885 mpa = (struct mpa_message *)(req + 1);
886 memset(mpa, 0, sizeof(*mpa));
887 memcpy(mpa->key, MPA_KEY_REP, sizeof(mpa->key));
888 mpa->flags = (ep->mpa_attr.crc_enabled ? MPA_CRC : 0) |
889 (markers_enabled ? MPA_MARKERS : 0);
890 mpa->revision = ep->mpa_attr.version;
891 mpa->private_data_size = htons(plen);
893 if (ep->mpa_attr.version == 2 && ep->mpa_attr.enhanced_rdma_conn) {
894 mpa->flags |= MPA_ENHANCED_RDMA_CONN;
895 mpa->private_data_size = htons(ntohs(mpa->private_data_size) +
896 sizeof (struct mpa_v2_conn_params));
897 mpa_v2_params.ird = htons((u16)ep->ird);
898 mpa_v2_params.ord = htons((u16)ep->ord);
899 if (peer2peer && (ep->mpa_attr.p2p_type !=
900 FW_RI_INIT_P2PTYPE_DISABLED)) {
901 mpa_v2_params.ird |= htons(MPA_V2_PEER2PEER_MODEL);
903 if (p2p_type == FW_RI_INIT_P2PTYPE_RDMA_WRITE)
905 htons(MPA_V2_RDMA_WRITE_RTR);
906 else if (p2p_type == FW_RI_INIT_P2PTYPE_READ_REQ)
908 htons(MPA_V2_RDMA_READ_RTR);
911 memcpy(mpa->private_data, &mpa_v2_params,
912 sizeof(struct mpa_v2_conn_params));
915 memcpy(mpa->private_data +
916 sizeof(struct mpa_v2_conn_params), pdata, plen);
919 memcpy(mpa->private_data, pdata, plen);
922 * Reference the mpa skb. This ensures the data area
923 * will remain in memory until the hw acks the tx.
924 * Function fw4_ack() will deref it.
927 t4_set_arp_err_handler(skb, NULL, arp_failure_discard);
929 __state_set(&ep->com, MPA_REP_SENT);
930 ep->snd_seq += mpalen;
931 return c4iw_l2t_send(&ep->com.dev->rdev, skb, ep->l2t);
934 static int act_establish(struct c4iw_dev *dev, struct sk_buff *skb)
937 struct cpl_act_establish *req = cplhdr(skb);
938 unsigned int tid = GET_TID(req);
939 unsigned int atid = GET_TID_TID(ntohl(req->tos_atid));
940 struct tid_info *t = dev->rdev.lldi.tids;
942 ep = lookup_atid(t, atid);
944 PDBG("%s ep %p tid %u snd_isn %u rcv_isn %u\n", __func__, ep, tid,
945 be32_to_cpu(req->snd_isn), be32_to_cpu(req->rcv_isn));
947 mutex_lock(&ep->com.mutex);
948 dst_confirm(ep->dst);
950 /* setup the hwtid for this connection */
952 cxgb4_insert_tid(t, ep, tid);
953 insert_handle(dev, &dev->hwtid_idr, ep, ep->hwtid);
955 ep->snd_seq = be32_to_cpu(req->snd_isn);
956 ep->rcv_seq = be32_to_cpu(req->rcv_isn);
958 set_emss(ep, ntohs(req->tcp_opt));
960 /* dealloc the atid */
961 remove_handle(ep->com.dev, &ep->com.dev->atid_idr, atid);
962 cxgb4_free_atid(t, atid);
963 set_bit(ACT_ESTAB, &ep->com.history);
965 /* start MPA negotiation */
966 send_flowc(ep, NULL);
967 if (ep->retry_with_mpa_v1)
968 send_mpa_req(ep, skb, 1);
970 send_mpa_req(ep, skb, mpa_rev);
971 mutex_unlock(&ep->com.mutex);
975 static void close_complete_upcall(struct c4iw_ep *ep, int status)
977 struct iw_cm_event event;
979 PDBG("%s ep %p tid %u\n", __func__, ep, ep->hwtid);
980 memset(&event, 0, sizeof(event));
981 event.event = IW_CM_EVENT_CLOSE;
982 event.status = status;
984 PDBG("close complete delivered ep %p cm_id %p tid %u\n",
985 ep, ep->com.cm_id, ep->hwtid);
986 ep->com.cm_id->event_handler(ep->com.cm_id, &event);
987 ep->com.cm_id->rem_ref(ep->com.cm_id);
988 ep->com.cm_id = NULL;
989 set_bit(CLOSE_UPCALL, &ep->com.history);
993 static int abort_connection(struct c4iw_ep *ep, struct sk_buff *skb, gfp_t gfp)
995 PDBG("%s ep %p tid %u\n", __func__, ep, ep->hwtid);
996 state_set(&ep->com, ABORTING);
997 set_bit(ABORT_CONN, &ep->com.history);
998 return send_abort(ep, skb, gfp);
1001 static void peer_close_upcall(struct c4iw_ep *ep)
1003 struct iw_cm_event event;
1005 PDBG("%s ep %p tid %u\n", __func__, ep, ep->hwtid);
1006 memset(&event, 0, sizeof(event));
1007 event.event = IW_CM_EVENT_DISCONNECT;
1008 if (ep->com.cm_id) {
1009 PDBG("peer close delivered ep %p cm_id %p tid %u\n",
1010 ep, ep->com.cm_id, ep->hwtid);
1011 ep->com.cm_id->event_handler(ep->com.cm_id, &event);
1012 set_bit(DISCONN_UPCALL, &ep->com.history);
1016 static void peer_abort_upcall(struct c4iw_ep *ep)
1018 struct iw_cm_event event;
1020 PDBG("%s ep %p tid %u\n", __func__, ep, ep->hwtid);
1021 memset(&event, 0, sizeof(event));
1022 event.event = IW_CM_EVENT_CLOSE;
1023 event.status = -ECONNRESET;
1024 if (ep->com.cm_id) {
1025 PDBG("abort delivered ep %p cm_id %p tid %u\n", ep,
1026 ep->com.cm_id, ep->hwtid);
1027 ep->com.cm_id->event_handler(ep->com.cm_id, &event);
1028 ep->com.cm_id->rem_ref(ep->com.cm_id);
1029 ep->com.cm_id = NULL;
1030 set_bit(ABORT_UPCALL, &ep->com.history);
1034 static void connect_reply_upcall(struct c4iw_ep *ep, int status)
1036 struct iw_cm_event event;
1038 PDBG("%s ep %p tid %u status %d\n", __func__, ep, ep->hwtid, status);
1039 memset(&event, 0, sizeof(event));
1040 event.event = IW_CM_EVENT_CONNECT_REPLY;
1041 event.status = status;
1042 memcpy(&event.local_addr, &ep->com.local_addr,
1043 sizeof(ep->com.local_addr));
1044 memcpy(&event.remote_addr, &ep->com.remote_addr,
1045 sizeof(ep->com.remote_addr));
1047 if ((status == 0) || (status == -ECONNREFUSED)) {
1048 if (!ep->tried_with_mpa_v1) {
1049 /* this means MPA_v2 is used */
1050 event.private_data_len = ep->plen -
1051 sizeof(struct mpa_v2_conn_params);
1052 event.private_data = ep->mpa_pkt +
1053 sizeof(struct mpa_message) +
1054 sizeof(struct mpa_v2_conn_params);
1056 /* this means MPA_v1 is used */
1057 event.private_data_len = ep->plen;
1058 event.private_data = ep->mpa_pkt +
1059 sizeof(struct mpa_message);
1063 PDBG("%s ep %p tid %u status %d\n", __func__, ep,
1065 set_bit(CONN_RPL_UPCALL, &ep->com.history);
1066 ep->com.cm_id->event_handler(ep->com.cm_id, &event);
1069 ep->com.cm_id->rem_ref(ep->com.cm_id);
1070 ep->com.cm_id = NULL;
1074 static int connect_request_upcall(struct c4iw_ep *ep)
1076 struct iw_cm_event event;
1079 PDBG("%s ep %p tid %u\n", __func__, ep, ep->hwtid);
1080 memset(&event, 0, sizeof(event));
1081 event.event = IW_CM_EVENT_CONNECT_REQUEST;
1082 memcpy(&event.local_addr, &ep->com.local_addr,
1083 sizeof(ep->com.local_addr));
1084 memcpy(&event.remote_addr, &ep->com.remote_addr,
1085 sizeof(ep->com.remote_addr));
1086 event.provider_data = ep;
1087 if (!ep->tried_with_mpa_v1) {
1088 /* this means MPA_v2 is used */
1089 event.ord = ep->ord;
1090 event.ird = ep->ird;
1091 event.private_data_len = ep->plen -
1092 sizeof(struct mpa_v2_conn_params);
1093 event.private_data = ep->mpa_pkt + sizeof(struct mpa_message) +
1094 sizeof(struct mpa_v2_conn_params);
1096 /* this means MPA_v1 is used. Send max supported */
1097 event.ord = c4iw_max_read_depth;
1098 event.ird = c4iw_max_read_depth;
1099 event.private_data_len = ep->plen;
1100 event.private_data = ep->mpa_pkt + sizeof(struct mpa_message);
1102 c4iw_get_ep(&ep->com);
1103 ret = ep->parent_ep->com.cm_id->event_handler(ep->parent_ep->com.cm_id,
1106 c4iw_put_ep(&ep->com);
1107 set_bit(CONNREQ_UPCALL, &ep->com.history);
1108 c4iw_put_ep(&ep->parent_ep->com);
1112 static void established_upcall(struct c4iw_ep *ep)
1114 struct iw_cm_event event;
1116 PDBG("%s ep %p tid %u\n", __func__, ep, ep->hwtid);
1117 memset(&event, 0, sizeof(event));
1118 event.event = IW_CM_EVENT_ESTABLISHED;
1119 event.ird = ep->ird;
1120 event.ord = ep->ord;
1121 if (ep->com.cm_id) {
1122 PDBG("%s ep %p tid %u\n", __func__, ep, ep->hwtid);
1123 ep->com.cm_id->event_handler(ep->com.cm_id, &event);
1124 set_bit(ESTAB_UPCALL, &ep->com.history);
1128 static int update_rx_credits(struct c4iw_ep *ep, u32 credits)
1130 struct cpl_rx_data_ack *req;
1131 struct sk_buff *skb;
1132 int wrlen = roundup(sizeof *req, 16);
1134 PDBG("%s ep %p tid %u credits %u\n", __func__, ep, ep->hwtid, credits);
1135 skb = get_skb(NULL, wrlen, GFP_KERNEL);
1137 printk(KERN_ERR MOD "update_rx_credits - cannot alloc skb!\n");
1141 req = (struct cpl_rx_data_ack *) skb_put(skb, wrlen);
1142 memset(req, 0, wrlen);
1143 INIT_TP_WR(req, ep->hwtid);
1144 OPCODE_TID(req) = cpu_to_be32(MK_OPCODE_TID(CPL_RX_DATA_ACK,
1146 req->credit_dack = cpu_to_be32(credits | RX_FORCE_ACK(1) |
1148 V_RX_DACK_MODE(dack_mode));
1149 set_wr_txq(skb, CPL_PRIORITY_ACK, ep->ctrlq_idx);
1150 c4iw_ofld_send(&ep->com.dev->rdev, skb);
1154 static void process_mpa_reply(struct c4iw_ep *ep, struct sk_buff *skb)
1156 struct mpa_message *mpa;
1157 struct mpa_v2_conn_params *mpa_v2_params;
1159 u16 resp_ird, resp_ord;
1160 u8 rtr_mismatch = 0, insuff_ird = 0;
1161 struct c4iw_qp_attributes attrs;
1162 enum c4iw_qp_attr_mask mask;
1165 PDBG("%s ep %p tid %u\n", __func__, ep, ep->hwtid);
1168 * Stop mpa timer. If it expired, then the state has
1169 * changed and we bail since ep_timeout already aborted
1173 if (state_read(&ep->com) != MPA_REQ_SENT)
1177 * If we get more than the supported amount of private data
1178 * then we must fail this connection.
1180 if (ep->mpa_pkt_len + skb->len > sizeof(ep->mpa_pkt)) {
1186 * copy the new data into our accumulation buffer.
1188 skb_copy_from_linear_data(skb, &(ep->mpa_pkt[ep->mpa_pkt_len]),
1190 ep->mpa_pkt_len += skb->len;
1193 * if we don't even have the mpa message, then bail.
1195 if (ep->mpa_pkt_len < sizeof(*mpa))
1197 mpa = (struct mpa_message *) ep->mpa_pkt;
1199 /* Validate MPA header. */
1200 if (mpa->revision > mpa_rev) {
1201 printk(KERN_ERR MOD "%s MPA version mismatch. Local = %d,"
1202 " Received = %d\n", __func__, mpa_rev, mpa->revision);
1206 if (memcmp(mpa->key, MPA_KEY_REP, sizeof(mpa->key))) {
1211 plen = ntohs(mpa->private_data_size);
1214 * Fail if there's too much private data.
1216 if (plen > MPA_MAX_PRIVATE_DATA) {
1222 * If plen does not account for pkt size
1224 if (ep->mpa_pkt_len > (sizeof(*mpa) + plen)) {
1229 ep->plen = (u8) plen;
1232 * If we don't have all the pdata yet, then bail.
1233 * We'll continue process when more data arrives.
1235 if (ep->mpa_pkt_len < (sizeof(*mpa) + plen))
1238 if (mpa->flags & MPA_REJECT) {
1239 err = -ECONNREFUSED;
1244 * If we get here we have accumulated the entire mpa
1245 * start reply message including private data. And
1246 * the MPA header is valid.
1248 state_set(&ep->com, FPDU_MODE);
1249 ep->mpa_attr.crc_enabled = (mpa->flags & MPA_CRC) | crc_enabled ? 1 : 0;
1250 ep->mpa_attr.recv_marker_enabled = markers_enabled;
1251 ep->mpa_attr.xmit_marker_enabled = mpa->flags & MPA_MARKERS ? 1 : 0;
1252 ep->mpa_attr.version = mpa->revision;
1253 ep->mpa_attr.p2p_type = FW_RI_INIT_P2PTYPE_DISABLED;
1255 if (mpa->revision == 2) {
1256 ep->mpa_attr.enhanced_rdma_conn =
1257 mpa->flags & MPA_ENHANCED_RDMA_CONN ? 1 : 0;
1258 if (ep->mpa_attr.enhanced_rdma_conn) {
1259 mpa_v2_params = (struct mpa_v2_conn_params *)
1260 (ep->mpa_pkt + sizeof(*mpa));
1261 resp_ird = ntohs(mpa_v2_params->ird) &
1262 MPA_V2_IRD_ORD_MASK;
1263 resp_ord = ntohs(mpa_v2_params->ord) &
1264 MPA_V2_IRD_ORD_MASK;
1267 * This is a double-check. Ideally, below checks are
1268 * not required since ird/ord stuff has been taken
1269 * care of in c4iw_accept_cr
1271 if ((ep->ird < resp_ord) || (ep->ord > resp_ird)) {
1278 if (ntohs(mpa_v2_params->ird) &
1279 MPA_V2_PEER2PEER_MODEL) {
1280 if (ntohs(mpa_v2_params->ord) &
1281 MPA_V2_RDMA_WRITE_RTR)
1282 ep->mpa_attr.p2p_type =
1283 FW_RI_INIT_P2PTYPE_RDMA_WRITE;
1284 else if (ntohs(mpa_v2_params->ord) &
1285 MPA_V2_RDMA_READ_RTR)
1286 ep->mpa_attr.p2p_type =
1287 FW_RI_INIT_P2PTYPE_READ_REQ;
1290 } else if (mpa->revision == 1)
1292 ep->mpa_attr.p2p_type = p2p_type;
1294 PDBG("%s - crc_enabled=%d, recv_marker_enabled=%d, "
1295 "xmit_marker_enabled=%d, version=%d p2p_type=%d local-p2p_type = "
1296 "%d\n", __func__, ep->mpa_attr.crc_enabled,
1297 ep->mpa_attr.recv_marker_enabled,
1298 ep->mpa_attr.xmit_marker_enabled, ep->mpa_attr.version,
1299 ep->mpa_attr.p2p_type, p2p_type);
1302 * If responder's RTR does not match with that of initiator, assign
1303 * FW_RI_INIT_P2PTYPE_DISABLED in mpa attributes so that RTR is not
1304 * generated when moving QP to RTS state.
1305 * A TERM message will be sent after QP has moved to RTS state
1307 if ((ep->mpa_attr.version == 2) && peer2peer &&
1308 (ep->mpa_attr.p2p_type != p2p_type)) {
1309 ep->mpa_attr.p2p_type = FW_RI_INIT_P2PTYPE_DISABLED;
1313 attrs.mpa_attr = ep->mpa_attr;
1314 attrs.max_ird = ep->ird;
1315 attrs.max_ord = ep->ord;
1316 attrs.llp_stream_handle = ep;
1317 attrs.next_state = C4IW_QP_STATE_RTS;
1319 mask = C4IW_QP_ATTR_NEXT_STATE |
1320 C4IW_QP_ATTR_LLP_STREAM_HANDLE | C4IW_QP_ATTR_MPA_ATTR |
1321 C4IW_QP_ATTR_MAX_IRD | C4IW_QP_ATTR_MAX_ORD;
1323 /* bind QP and TID with INIT_WR */
1324 err = c4iw_modify_qp(ep->com.qp->rhp,
1325 ep->com.qp, mask, &attrs, 1);
1330 * If responder's RTR requirement did not match with what initiator
1331 * supports, generate TERM message
1334 printk(KERN_ERR "%s: RTR mismatch, sending TERM\n", __func__);
1335 attrs.layer_etype = LAYER_MPA | DDP_LLP;
1336 attrs.ecode = MPA_NOMATCH_RTR;
1337 attrs.next_state = C4IW_QP_STATE_TERMINATE;
1338 err = c4iw_modify_qp(ep->com.qp->rhp, ep->com.qp,
1339 C4IW_QP_ATTR_NEXT_STATE, &attrs, 0);
1345 * Generate TERM if initiator IRD is not sufficient for responder
1346 * provided ORD. Currently, we do the same behaviour even when
1347 * responder provided IRD is also not sufficient as regards to
1351 printk(KERN_ERR "%s: Insufficient IRD, sending TERM\n",
1353 attrs.layer_etype = LAYER_MPA | DDP_LLP;
1354 attrs.ecode = MPA_INSUFF_IRD;
1355 attrs.next_state = C4IW_QP_STATE_TERMINATE;
1356 err = c4iw_modify_qp(ep->com.qp->rhp, ep->com.qp,
1357 C4IW_QP_ATTR_NEXT_STATE, &attrs, 0);
1363 state_set(&ep->com, ABORTING);
1364 send_abort(ep, skb, GFP_KERNEL);
1366 connect_reply_upcall(ep, err);
1370 static void process_mpa_request(struct c4iw_ep *ep, struct sk_buff *skb)
1372 struct mpa_message *mpa;
1373 struct mpa_v2_conn_params *mpa_v2_params;
1376 PDBG("%s ep %p tid %u\n", __func__, ep, ep->hwtid);
1378 if (state_read(&ep->com) != MPA_REQ_WAIT)
1382 * If we get more than the supported amount of private data
1383 * then we must fail this connection.
1385 if (ep->mpa_pkt_len + skb->len > sizeof(ep->mpa_pkt)) {
1387 abort_connection(ep, skb, GFP_KERNEL);
1391 PDBG("%s enter (%s line %u)\n", __func__, __FILE__, __LINE__);
1394 * Copy the new data into our accumulation buffer.
1396 skb_copy_from_linear_data(skb, &(ep->mpa_pkt[ep->mpa_pkt_len]),
1398 ep->mpa_pkt_len += skb->len;
1401 * If we don't even have the mpa message, then bail.
1402 * We'll continue process when more data arrives.
1404 if (ep->mpa_pkt_len < sizeof(*mpa))
1407 PDBG("%s enter (%s line %u)\n", __func__, __FILE__, __LINE__);
1408 mpa = (struct mpa_message *) ep->mpa_pkt;
1411 * Validate MPA Header.
1413 if (mpa->revision > mpa_rev) {
1414 printk(KERN_ERR MOD "%s MPA version mismatch. Local = %d,"
1415 " Received = %d\n", __func__, mpa_rev, mpa->revision);
1417 abort_connection(ep, skb, GFP_KERNEL);
1421 if (memcmp(mpa->key, MPA_KEY_REQ, sizeof(mpa->key))) {
1423 abort_connection(ep, skb, GFP_KERNEL);
1427 plen = ntohs(mpa->private_data_size);
1430 * Fail if there's too much private data.
1432 if (plen > MPA_MAX_PRIVATE_DATA) {
1434 abort_connection(ep, skb, GFP_KERNEL);
1439 * If plen does not account for pkt size
1441 if (ep->mpa_pkt_len > (sizeof(*mpa) + plen)) {
1443 abort_connection(ep, skb, GFP_KERNEL);
1446 ep->plen = (u8) plen;
1449 * If we don't have all the pdata yet, then bail.
1451 if (ep->mpa_pkt_len < (sizeof(*mpa) + plen))
1455 * If we get here we have accumulated the entire mpa
1456 * start reply message including private data.
1458 ep->mpa_attr.initiator = 0;
1459 ep->mpa_attr.crc_enabled = (mpa->flags & MPA_CRC) | crc_enabled ? 1 : 0;
1460 ep->mpa_attr.recv_marker_enabled = markers_enabled;
1461 ep->mpa_attr.xmit_marker_enabled = mpa->flags & MPA_MARKERS ? 1 : 0;
1462 ep->mpa_attr.version = mpa->revision;
1463 if (mpa->revision == 1)
1464 ep->tried_with_mpa_v1 = 1;
1465 ep->mpa_attr.p2p_type = FW_RI_INIT_P2PTYPE_DISABLED;
1467 if (mpa->revision == 2) {
1468 ep->mpa_attr.enhanced_rdma_conn =
1469 mpa->flags & MPA_ENHANCED_RDMA_CONN ? 1 : 0;
1470 if (ep->mpa_attr.enhanced_rdma_conn) {
1471 mpa_v2_params = (struct mpa_v2_conn_params *)
1472 (ep->mpa_pkt + sizeof(*mpa));
1473 ep->ird = ntohs(mpa_v2_params->ird) &
1474 MPA_V2_IRD_ORD_MASK;
1475 ep->ord = ntohs(mpa_v2_params->ord) &
1476 MPA_V2_IRD_ORD_MASK;
1477 if (ntohs(mpa_v2_params->ird) & MPA_V2_PEER2PEER_MODEL)
1479 if (ntohs(mpa_v2_params->ord) &
1480 MPA_V2_RDMA_WRITE_RTR)
1481 ep->mpa_attr.p2p_type =
1482 FW_RI_INIT_P2PTYPE_RDMA_WRITE;
1483 else if (ntohs(mpa_v2_params->ord) &
1484 MPA_V2_RDMA_READ_RTR)
1485 ep->mpa_attr.p2p_type =
1486 FW_RI_INIT_P2PTYPE_READ_REQ;
1489 } else if (mpa->revision == 1)
1491 ep->mpa_attr.p2p_type = p2p_type;
1493 PDBG("%s - crc_enabled=%d, recv_marker_enabled=%d, "
1494 "xmit_marker_enabled=%d, version=%d p2p_type=%d\n", __func__,
1495 ep->mpa_attr.crc_enabled, ep->mpa_attr.recv_marker_enabled,
1496 ep->mpa_attr.xmit_marker_enabled, ep->mpa_attr.version,
1497 ep->mpa_attr.p2p_type);
1499 state_set(&ep->com, MPA_REQ_RCVD);
1503 mutex_lock(&ep->parent_ep->com.mutex);
1504 if (ep->parent_ep->com.state != DEAD) {
1505 if (connect_request_upcall(ep))
1506 abort_connection(ep, skb, GFP_KERNEL);
1508 abort_connection(ep, skb, GFP_KERNEL);
1510 mutex_unlock(&ep->parent_ep->com.mutex);
1514 static int rx_data(struct c4iw_dev *dev, struct sk_buff *skb)
1517 struct cpl_rx_data *hdr = cplhdr(skb);
1518 unsigned int dlen = ntohs(hdr->len);
1519 unsigned int tid = GET_TID(hdr);
1520 struct tid_info *t = dev->rdev.lldi.tids;
1521 __u8 status = hdr->status;
1523 ep = lookup_tid(t, tid);
1524 PDBG("%s ep %p tid %u dlen %u\n", __func__, ep, ep->hwtid, dlen);
1525 skb_pull(skb, sizeof(*hdr));
1526 skb_trim(skb, dlen);
1528 /* update RX credits */
1529 update_rx_credits(ep, dlen);
1531 switch (state_read(&ep->com)) {
1533 ep->rcv_seq += dlen;
1534 process_mpa_reply(ep, skb);
1537 ep->rcv_seq += dlen;
1538 process_mpa_request(ep, skb);
1541 struct c4iw_qp_attributes attrs;
1542 BUG_ON(!ep->com.qp);
1544 pr_err("%s Unexpected streaming data." \
1545 " qpid %u ep %p state %d tid %u status %d\n",
1546 __func__, ep->com.qp->wq.sq.qid, ep,
1547 state_read(&ep->com), ep->hwtid, status);
1548 attrs.next_state = C4IW_QP_STATE_TERMINATE;
1549 c4iw_modify_qp(ep->com.qp->rhp, ep->com.qp,
1550 C4IW_QP_ATTR_NEXT_STATE, &attrs, 0);
1559 static int abort_rpl(struct c4iw_dev *dev, struct sk_buff *skb)
1562 struct cpl_abort_rpl_rss *rpl = cplhdr(skb);
1564 unsigned int tid = GET_TID(rpl);
1565 struct tid_info *t = dev->rdev.lldi.tids;
1567 ep = lookup_tid(t, tid);
1569 printk(KERN_WARNING MOD "Abort rpl to freed endpoint\n");
1572 PDBG("%s ep %p tid %u\n", __func__, ep, ep->hwtid);
1573 mutex_lock(&ep->com.mutex);
1574 switch (ep->com.state) {
1576 c4iw_wake_up(&ep->com.wr_wait, -ECONNRESET);
1577 __state_set(&ep->com, DEAD);
1581 printk(KERN_ERR "%s ep %p state %d\n",
1582 __func__, ep, ep->com.state);
1585 mutex_unlock(&ep->com.mutex);
1588 release_ep_resources(ep);
1592 static void send_fw_act_open_req(struct c4iw_ep *ep, unsigned int atid)
1594 struct sk_buff *skb;
1595 struct fw_ofld_connection_wr *req;
1596 unsigned int mtu_idx;
1598 struct sockaddr_in *sin;
1600 skb = get_skb(NULL, sizeof(*req), GFP_KERNEL);
1601 req = (struct fw_ofld_connection_wr *)__skb_put(skb, sizeof(*req));
1602 memset(req, 0, sizeof(*req));
1603 req->op_compl = htonl(V_WR_OP(FW_OFLD_CONNECTION_WR));
1604 req->len16_pkd = htonl(FW_WR_LEN16(DIV_ROUND_UP(sizeof(*req), 16)));
1605 req->le.filter = cpu_to_be32(cxgb4_select_ntuple(
1606 ep->com.dev->rdev.lldi.ports[0],
1608 sin = (struct sockaddr_in *)&ep->com.local_addr;
1609 req->le.lport = sin->sin_port;
1610 req->le.u.ipv4.lip = sin->sin_addr.s_addr;
1611 sin = (struct sockaddr_in *)&ep->com.remote_addr;
1612 req->le.pport = sin->sin_port;
1613 req->le.u.ipv4.pip = sin->sin_addr.s_addr;
1614 req->tcb.t_state_to_astid =
1615 htonl(V_FW_OFLD_CONNECTION_WR_T_STATE(TCP_SYN_SENT) |
1616 V_FW_OFLD_CONNECTION_WR_ASTID(atid));
1617 req->tcb.cplrxdataack_cplpassacceptrpl =
1618 htons(F_FW_OFLD_CONNECTION_WR_CPLRXDATAACK);
1619 req->tcb.tx_max = (__force __be32) jiffies;
1620 req->tcb.rcv_adv = htons(1);
1621 cxgb4_best_mtu(ep->com.dev->rdev.lldi.mtus, ep->mtu, &mtu_idx);
1622 wscale = compute_wscale(rcv_win);
1623 req->tcb.opt0 = (__force __be64) (TCAM_BYPASS(1) |
1624 (nocong ? NO_CONG(1) : 0) |
1629 L2T_IDX(ep->l2t->idx) |
1630 TX_CHAN(ep->tx_chan) |
1631 SMAC_SEL(ep->smac_idx) |
1633 ULP_MODE(ULP_MODE_TCPDDP) |
1634 RCV_BUFSIZ(rcv_win >> 10));
1635 req->tcb.opt2 = (__force __be32) (PACE(1) |
1636 TX_QUEUE(ep->com.dev->rdev.lldi.tx_modq[ep->tx_chan]) |
1638 CCTRL_ECN(enable_ecn) |
1639 RSS_QUEUE_VALID | RSS_QUEUE(ep->rss_qid));
1640 if (enable_tcp_timestamps)
1641 req->tcb.opt2 |= (__force __be32) TSTAMPS_EN(1);
1642 if (enable_tcp_sack)
1643 req->tcb.opt2 |= (__force __be32) SACK_EN(1);
1644 if (wscale && enable_tcp_window_scaling)
1645 req->tcb.opt2 |= (__force __be32) WND_SCALE_EN(1);
1646 req->tcb.opt0 = cpu_to_be64((__force u64) req->tcb.opt0);
1647 req->tcb.opt2 = cpu_to_be32((__force u32) req->tcb.opt2);
1648 set_wr_txq(skb, CPL_PRIORITY_CONTROL, ep->ctrlq_idx);
1649 set_bit(ACT_OFLD_CONN, &ep->com.history);
1650 c4iw_l2t_send(&ep->com.dev->rdev, skb, ep->l2t);
1654 * Return whether a failed active open has allocated a TID
1656 static inline int act_open_has_tid(int status)
1658 return status != CPL_ERR_TCAM_FULL && status != CPL_ERR_CONN_EXIST &&
1659 status != CPL_ERR_ARP_MISS;
1662 #define ACT_OPEN_RETRY_COUNT 2
1664 static int import_ep(struct c4iw_ep *ep, int iptype, __u8 *peer_ip,
1665 struct dst_entry *dst, struct c4iw_dev *cdev,
1668 struct neighbour *n;
1670 struct net_device *pdev;
1672 n = dst_neigh_lookup(dst, peer_ip);
1678 if (n->dev->flags & IFF_LOOPBACK) {
1680 pdev = ip_dev_find(&init_net, *(__be32 *)peer_ip);
1681 else if (IS_ENABLED(CONFIG_IPV6))
1682 for_each_netdev(&init_net, pdev) {
1683 if (ipv6_chk_addr(&init_net,
1684 (struct in6_addr *)peer_ip,
1695 ep->l2t = cxgb4_l2t_get(cdev->rdev.lldi.l2t,
1699 ep->mtu = pdev->mtu;
1700 ep->tx_chan = cxgb4_port_chan(pdev);
1701 ep->smac_idx = (cxgb4_port_viid(pdev) & 0x7F) << 1;
1702 step = cdev->rdev.lldi.ntxq /
1703 cdev->rdev.lldi.nchan;
1704 ep->txq_idx = cxgb4_port_idx(pdev) * step;
1705 step = cdev->rdev.lldi.nrxq /
1706 cdev->rdev.lldi.nchan;
1707 ep->ctrlq_idx = cxgb4_port_idx(pdev);
1708 ep->rss_qid = cdev->rdev.lldi.rxq_ids[
1709 cxgb4_port_idx(pdev) * step];
1712 pdev = get_real_dev(n->dev);
1713 ep->l2t = cxgb4_l2t_get(cdev->rdev.lldi.l2t,
1717 ep->mtu = dst_mtu(dst);
1718 ep->tx_chan = cxgb4_port_chan(n->dev);
1719 ep->smac_idx = (cxgb4_port_viid(n->dev) & 0x7F) << 1;
1720 step = cdev->rdev.lldi.ntxq /
1721 cdev->rdev.lldi.nchan;
1722 ep->txq_idx = cxgb4_port_idx(n->dev) * step;
1723 ep->ctrlq_idx = cxgb4_port_idx(n->dev);
1724 step = cdev->rdev.lldi.nrxq /
1725 cdev->rdev.lldi.nchan;
1726 ep->rss_qid = cdev->rdev.lldi.rxq_ids[
1727 cxgb4_port_idx(n->dev) * step];
1730 ep->retry_with_mpa_v1 = 0;
1731 ep->tried_with_mpa_v1 = 0;
1743 static int c4iw_reconnect(struct c4iw_ep *ep)
1746 struct sockaddr_in *laddr = (struct sockaddr_in *)
1747 &ep->com.cm_id->local_addr;
1748 struct sockaddr_in *raddr = (struct sockaddr_in *)
1749 &ep->com.cm_id->remote_addr;
1750 struct sockaddr_in6 *laddr6 = (struct sockaddr_in6 *)
1751 &ep->com.cm_id->local_addr;
1752 struct sockaddr_in6 *raddr6 = (struct sockaddr_in6 *)
1753 &ep->com.cm_id->remote_addr;
1757 PDBG("%s qp %p cm_id %p\n", __func__, ep->com.qp, ep->com.cm_id);
1758 init_timer(&ep->timer);
1761 * Allocate an active TID to initiate a TCP connection.
1763 ep->atid = cxgb4_alloc_atid(ep->com.dev->rdev.lldi.tids, ep);
1764 if (ep->atid == -1) {
1765 pr_err("%s - cannot alloc atid.\n", __func__);
1769 insert_handle(ep->com.dev, &ep->com.dev->atid_idr, ep, ep->atid);
1772 if (ep->com.cm_id->local_addr.ss_family == AF_INET) {
1773 ep->dst = find_route(ep->com.dev, laddr->sin_addr.s_addr,
1774 raddr->sin_addr.s_addr, laddr->sin_port,
1775 raddr->sin_port, 0);
1777 ra = (__u8 *)&raddr->sin_addr;
1779 ep->dst = find_route6(ep->com.dev, laddr6->sin6_addr.s6_addr,
1780 raddr6->sin6_addr.s6_addr,
1781 laddr6->sin6_port, raddr6->sin6_port, 0,
1782 raddr6->sin6_scope_id);
1784 ra = (__u8 *)&raddr6->sin6_addr;
1787 pr_err("%s - cannot find route.\n", __func__);
1788 err = -EHOSTUNREACH;
1791 err = import_ep(ep, iptype, ra, ep->dst, ep->com.dev, false);
1793 pr_err("%s - cannot alloc l2e.\n", __func__);
1797 PDBG("%s txq_idx %u tx_chan %u smac_idx %u rss_qid %u l2t_idx %u\n",
1798 __func__, ep->txq_idx, ep->tx_chan, ep->smac_idx, ep->rss_qid,
1801 state_set(&ep->com, CONNECTING);
1804 /* send connect request to rnic */
1805 err = send_connect(ep);
1809 cxgb4_l2t_release(ep->l2t);
1811 dst_release(ep->dst);
1813 remove_handle(ep->com.dev, &ep->com.dev->atid_idr, ep->atid);
1814 cxgb4_free_atid(ep->com.dev->rdev.lldi.tids, ep->atid);
1817 * remember to send notification to upper layer.
1818 * We are in here so the upper layer is not aware that this is
1819 * re-connect attempt and so, upper layer is still waiting for
1820 * response of 1st connect request.
1822 connect_reply_upcall(ep, -ECONNRESET);
1823 c4iw_put_ep(&ep->com);
1828 static int act_open_rpl(struct c4iw_dev *dev, struct sk_buff *skb)
1831 struct cpl_act_open_rpl *rpl = cplhdr(skb);
1832 unsigned int atid = GET_TID_TID(GET_AOPEN_ATID(
1833 ntohl(rpl->atid_status)));
1834 struct tid_info *t = dev->rdev.lldi.tids;
1835 int status = GET_AOPEN_STATUS(ntohl(rpl->atid_status));
1836 struct sockaddr_in *la;
1837 struct sockaddr_in *ra;
1838 struct sockaddr_in6 *la6;
1839 struct sockaddr_in6 *ra6;
1841 ep = lookup_atid(t, atid);
1842 la = (struct sockaddr_in *)&ep->com.local_addr;
1843 ra = (struct sockaddr_in *)&ep->com.remote_addr;
1844 la6 = (struct sockaddr_in6 *)&ep->com.local_addr;
1845 ra6 = (struct sockaddr_in6 *)&ep->com.remote_addr;
1847 PDBG("%s ep %p atid %u status %u errno %d\n", __func__, ep, atid,
1848 status, status2errno(status));
1850 if (status == CPL_ERR_RTX_NEG_ADVICE) {
1851 printk(KERN_WARNING MOD "Connection problems for atid %u\n",
1856 set_bit(ACT_OPEN_RPL, &ep->com.history);
1859 * Log interesting failures.
1862 case CPL_ERR_CONN_RESET:
1863 case CPL_ERR_CONN_TIMEDOUT:
1865 case CPL_ERR_TCAM_FULL:
1866 mutex_lock(&dev->rdev.stats.lock);
1867 dev->rdev.stats.tcam_full++;
1868 mutex_unlock(&dev->rdev.stats.lock);
1869 if (ep->com.local_addr.ss_family == AF_INET &&
1870 dev->rdev.lldi.enable_fw_ofld_conn) {
1871 send_fw_act_open_req(ep,
1872 GET_TID_TID(GET_AOPEN_ATID(
1873 ntohl(rpl->atid_status))));
1877 case CPL_ERR_CONN_EXIST:
1878 if (ep->retry_count++ < ACT_OPEN_RETRY_COUNT) {
1879 set_bit(ACT_RETRY_INUSE, &ep->com.history);
1880 remove_handle(ep->com.dev, &ep->com.dev->atid_idr,
1882 cxgb4_free_atid(t, atid);
1883 dst_release(ep->dst);
1884 cxgb4_l2t_release(ep->l2t);
1890 if (ep->com.local_addr.ss_family == AF_INET) {
1891 pr_info("Active open failure - atid %u status %u errno %d %pI4:%u->%pI4:%u\n",
1892 atid, status, status2errno(status),
1893 &la->sin_addr.s_addr, ntohs(la->sin_port),
1894 &ra->sin_addr.s_addr, ntohs(ra->sin_port));
1896 pr_info("Active open failure - atid %u status %u errno %d %pI6:%u->%pI6:%u\n",
1897 atid, status, status2errno(status),
1898 la6->sin6_addr.s6_addr, ntohs(la6->sin6_port),
1899 ra6->sin6_addr.s6_addr, ntohs(ra6->sin6_port));
1904 connect_reply_upcall(ep, status2errno(status));
1905 state_set(&ep->com, DEAD);
1907 if (status && act_open_has_tid(status))
1908 cxgb4_remove_tid(ep->com.dev->rdev.lldi.tids, 0, GET_TID(rpl));
1910 remove_handle(ep->com.dev, &ep->com.dev->atid_idr, atid);
1911 cxgb4_free_atid(t, atid);
1912 dst_release(ep->dst);
1913 cxgb4_l2t_release(ep->l2t);
1914 c4iw_put_ep(&ep->com);
1919 static int pass_open_rpl(struct c4iw_dev *dev, struct sk_buff *skb)
1921 struct cpl_pass_open_rpl *rpl = cplhdr(skb);
1922 struct tid_info *t = dev->rdev.lldi.tids;
1923 unsigned int stid = GET_TID(rpl);
1924 struct c4iw_listen_ep *ep = lookup_stid(t, stid);
1927 PDBG("%s stid %d lookup failure!\n", __func__, stid);
1930 PDBG("%s ep %p status %d error %d\n", __func__, ep,
1931 rpl->status, status2errno(rpl->status));
1932 c4iw_wake_up(&ep->com.wr_wait, status2errno(rpl->status));
1938 static int close_listsrv_rpl(struct c4iw_dev *dev, struct sk_buff *skb)
1940 struct cpl_close_listsvr_rpl *rpl = cplhdr(skb);
1941 struct tid_info *t = dev->rdev.lldi.tids;
1942 unsigned int stid = GET_TID(rpl);
1943 struct c4iw_listen_ep *ep = lookup_stid(t, stid);
1945 PDBG("%s ep %p\n", __func__, ep);
1946 c4iw_wake_up(&ep->com.wr_wait, status2errno(rpl->status));
1950 static void accept_cr(struct c4iw_ep *ep, struct sk_buff *skb,
1951 struct cpl_pass_accept_req *req)
1953 struct cpl_pass_accept_rpl *rpl;
1954 unsigned int mtu_idx;
1959 PDBG("%s ep %p tid %u\n", __func__, ep, ep->hwtid);
1960 BUG_ON(skb_cloned(skb));
1961 skb_trim(skb, sizeof(*rpl));
1963 cxgb4_best_mtu(ep->com.dev->rdev.lldi.mtus, ep->mtu, &mtu_idx);
1964 wscale = compute_wscale(rcv_win);
1965 opt0 = (nocong ? NO_CONG(1) : 0) |
1970 L2T_IDX(ep->l2t->idx) |
1971 TX_CHAN(ep->tx_chan) |
1972 SMAC_SEL(ep->smac_idx) |
1973 DSCP(ep->tos >> 2) |
1974 ULP_MODE(ULP_MODE_TCPDDP) |
1975 RCV_BUFSIZ(rcv_win>>10);
1976 opt2 = RX_CHANNEL(0) |
1977 RSS_QUEUE_VALID | RSS_QUEUE(ep->rss_qid);
1979 if (enable_tcp_timestamps && req->tcpopt.tstamp)
1980 opt2 |= TSTAMPS_EN(1);
1981 if (enable_tcp_sack && req->tcpopt.sack)
1983 if (wscale && enable_tcp_window_scaling)
1984 opt2 |= WND_SCALE_EN(1);
1986 const struct tcphdr *tcph;
1987 u32 hlen = ntohl(req->hdr_len);
1989 tcph = (const void *)(req + 1) + G_ETH_HDR_LEN(hlen) +
1991 if (tcph->ece && tcph->cwr)
1992 opt2 |= CCTRL_ECN(1);
1996 INIT_TP_WR(rpl, ep->hwtid);
1997 OPCODE_TID(rpl) = cpu_to_be32(MK_OPCODE_TID(CPL_PASS_ACCEPT_RPL,
1999 rpl->opt0 = cpu_to_be64(opt0);
2000 rpl->opt2 = cpu_to_be32(opt2);
2001 set_wr_txq(skb, CPL_PRIORITY_SETUP, ep->ctrlq_idx);
2002 t4_set_arp_err_handler(skb, NULL, arp_failure_discard);
2003 c4iw_l2t_send(&ep->com.dev->rdev, skb, ep->l2t);
2008 static void reject_cr(struct c4iw_dev *dev, u32 hwtid, struct sk_buff *skb)
2010 PDBG("%s c4iw_dev %p tid %u\n", __func__, dev, hwtid);
2011 BUG_ON(skb_cloned(skb));
2012 skb_trim(skb, sizeof(struct cpl_tid_release));
2014 release_tid(&dev->rdev, hwtid, skb);
2018 static void get_4tuple(struct cpl_pass_accept_req *req, int *iptype,
2019 __u8 *local_ip, __u8 *peer_ip,
2020 __be16 *local_port, __be16 *peer_port)
2022 int eth_len = G_ETH_HDR_LEN(be32_to_cpu(req->hdr_len));
2023 int ip_len = G_IP_HDR_LEN(be32_to_cpu(req->hdr_len));
2024 struct iphdr *ip = (struct iphdr *)((u8 *)(req + 1) + eth_len);
2025 struct ipv6hdr *ip6 = (struct ipv6hdr *)((u8 *)(req + 1) + eth_len);
2026 struct tcphdr *tcp = (struct tcphdr *)
2027 ((u8 *)(req + 1) + eth_len + ip_len);
2029 if (ip->version == 4) {
2030 PDBG("%s saddr 0x%x daddr 0x%x sport %u dport %u\n", __func__,
2031 ntohl(ip->saddr), ntohl(ip->daddr), ntohs(tcp->source),
2034 memcpy(peer_ip, &ip->saddr, 4);
2035 memcpy(local_ip, &ip->daddr, 4);
2037 PDBG("%s saddr %pI6 daddr %pI6 sport %u dport %u\n", __func__,
2038 ip6->saddr.s6_addr, ip6->daddr.s6_addr, ntohs(tcp->source),
2041 memcpy(peer_ip, ip6->saddr.s6_addr, 16);
2042 memcpy(local_ip, ip6->daddr.s6_addr, 16);
2044 *peer_port = tcp->source;
2045 *local_port = tcp->dest;
2050 static int pass_accept_req(struct c4iw_dev *dev, struct sk_buff *skb)
2052 struct c4iw_ep *child_ep = NULL, *parent_ep;
2053 struct cpl_pass_accept_req *req = cplhdr(skb);
2054 unsigned int stid = GET_POPEN_TID(ntohl(req->tos_stid));
2055 struct tid_info *t = dev->rdev.lldi.tids;
2056 unsigned int hwtid = GET_TID(req);
2057 struct dst_entry *dst;
2058 __u8 local_ip[16], peer_ip[16];
2059 __be16 local_port, peer_port;
2061 u16 peer_mss = ntohs(req->tcpopt.mss);
2064 parent_ep = lookup_stid(t, stid);
2066 PDBG("%s connect request on invalid stid %d\n", __func__, stid);
2070 if (state_read(&parent_ep->com) != LISTEN) {
2071 printk(KERN_ERR "%s - listening ep not in LISTEN\n",
2076 get_4tuple(req, &iptype, local_ip, peer_ip, &local_port, &peer_port);
2078 /* Find output route */
2080 PDBG("%s parent ep %p hwtid %u laddr %pI4 raddr %pI4 lport %d rport %d peer_mss %d\n"
2081 , __func__, parent_ep, hwtid,
2082 local_ip, peer_ip, ntohs(local_port),
2083 ntohs(peer_port), peer_mss);
2084 dst = find_route(dev, *(__be32 *)local_ip, *(__be32 *)peer_ip,
2085 local_port, peer_port,
2086 GET_POPEN_TOS(ntohl(req->tos_stid)));
2088 PDBG("%s parent ep %p hwtid %u laddr %pI6 raddr %pI6 lport %d rport %d peer_mss %d\n"
2089 , __func__, parent_ep, hwtid,
2090 local_ip, peer_ip, ntohs(local_port),
2091 ntohs(peer_port), peer_mss);
2092 dst = find_route6(dev, local_ip, peer_ip, local_port, peer_port,
2093 PASS_OPEN_TOS(ntohl(req->tos_stid)),
2094 ((struct sockaddr_in6 *)
2095 &parent_ep->com.local_addr)->sin6_scope_id);
2098 printk(KERN_ERR MOD "%s - failed to find dst entry!\n",
2103 child_ep = alloc_ep(sizeof(*child_ep), GFP_KERNEL);
2105 printk(KERN_ERR MOD "%s - failed to allocate ep entry!\n",
2111 err = import_ep(child_ep, iptype, peer_ip, dst, dev, false);
2113 printk(KERN_ERR MOD "%s - failed to allocate l2t entry!\n",
2120 if (peer_mss && child_ep->mtu > (peer_mss + 40))
2121 child_ep->mtu = peer_mss + 40;
2123 state_set(&child_ep->com, CONNECTING);
2124 child_ep->com.dev = dev;
2125 child_ep->com.cm_id = NULL;
2127 struct sockaddr_in *sin = (struct sockaddr_in *)
2128 &child_ep->com.local_addr;
2129 sin->sin_family = PF_INET;
2130 sin->sin_port = local_port;
2131 sin->sin_addr.s_addr = *(__be32 *)local_ip;
2132 sin = (struct sockaddr_in *)&child_ep->com.remote_addr;
2133 sin->sin_family = PF_INET;
2134 sin->sin_port = peer_port;
2135 sin->sin_addr.s_addr = *(__be32 *)peer_ip;
2137 struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *)
2138 &child_ep->com.local_addr;
2139 sin6->sin6_family = PF_INET6;
2140 sin6->sin6_port = local_port;
2141 memcpy(sin6->sin6_addr.s6_addr, local_ip, 16);
2142 sin6 = (struct sockaddr_in6 *)&child_ep->com.remote_addr;
2143 sin6->sin6_family = PF_INET6;
2144 sin6->sin6_port = peer_port;
2145 memcpy(sin6->sin6_addr.s6_addr, peer_ip, 16);
2147 c4iw_get_ep(&parent_ep->com);
2148 child_ep->parent_ep = parent_ep;
2149 child_ep->tos = GET_POPEN_TOS(ntohl(req->tos_stid));
2150 child_ep->dst = dst;
2151 child_ep->hwtid = hwtid;
2153 PDBG("%s tx_chan %u smac_idx %u rss_qid %u\n", __func__,
2154 child_ep->tx_chan, child_ep->smac_idx, child_ep->rss_qid);
2156 init_timer(&child_ep->timer);
2157 cxgb4_insert_tid(t, child_ep, hwtid);
2158 insert_handle(dev, &dev->hwtid_idr, child_ep, child_ep->hwtid);
2159 accept_cr(child_ep, skb, req);
2160 set_bit(PASS_ACCEPT_REQ, &child_ep->com.history);
2163 reject_cr(dev, hwtid, skb);
2168 static int pass_establish(struct c4iw_dev *dev, struct sk_buff *skb)
2171 struct cpl_pass_establish *req = cplhdr(skb);
2172 struct tid_info *t = dev->rdev.lldi.tids;
2173 unsigned int tid = GET_TID(req);
2175 ep = lookup_tid(t, tid);
2176 PDBG("%s ep %p tid %u\n", __func__, ep, ep->hwtid);
2177 ep->snd_seq = be32_to_cpu(req->snd_isn);
2178 ep->rcv_seq = be32_to_cpu(req->rcv_isn);
2180 PDBG("%s ep %p hwtid %u tcp_opt 0x%02x\n", __func__, ep, tid,
2181 ntohs(req->tcp_opt));
2183 set_emss(ep, ntohs(req->tcp_opt));
2185 dst_confirm(ep->dst);
2186 state_set(&ep->com, MPA_REQ_WAIT);
2188 send_flowc(ep, skb);
2189 set_bit(PASS_ESTAB, &ep->com.history);
2194 static int peer_close(struct c4iw_dev *dev, struct sk_buff *skb)
2196 struct cpl_peer_close *hdr = cplhdr(skb);
2198 struct c4iw_qp_attributes attrs;
2201 struct tid_info *t = dev->rdev.lldi.tids;
2202 unsigned int tid = GET_TID(hdr);
2205 ep = lookup_tid(t, tid);
2206 PDBG("%s ep %p tid %u\n", __func__, ep, ep->hwtid);
2207 dst_confirm(ep->dst);
2209 set_bit(PEER_CLOSE, &ep->com.history);
2210 mutex_lock(&ep->com.mutex);
2211 switch (ep->com.state) {
2213 __state_set(&ep->com, CLOSING);
2216 __state_set(&ep->com, CLOSING);
2217 connect_reply_upcall(ep, -ECONNRESET);
2222 * We're gonna mark this puppy DEAD, but keep
2223 * the reference on it until the ULP accepts or
2224 * rejects the CR. Also wake up anyone waiting
2225 * in rdma connection migration (see c4iw_accept_cr()).
2227 __state_set(&ep->com, CLOSING);
2228 PDBG("waking up ep %p tid %u\n", ep, ep->hwtid);
2229 c4iw_wake_up(&ep->com.wr_wait, -ECONNRESET);
2232 __state_set(&ep->com, CLOSING);
2233 PDBG("waking up ep %p tid %u\n", ep, ep->hwtid);
2234 c4iw_wake_up(&ep->com.wr_wait, -ECONNRESET);
2238 __state_set(&ep->com, CLOSING);
2239 attrs.next_state = C4IW_QP_STATE_CLOSING;
2240 ret = c4iw_modify_qp(ep->com.qp->rhp, ep->com.qp,
2241 C4IW_QP_ATTR_NEXT_STATE, &attrs, 1);
2242 if (ret != -ECONNRESET) {
2243 peer_close_upcall(ep);
2251 __state_set(&ep->com, MORIBUND);
2256 if (ep->com.cm_id && ep->com.qp) {
2257 attrs.next_state = C4IW_QP_STATE_IDLE;
2258 c4iw_modify_qp(ep->com.qp->rhp, ep->com.qp,
2259 C4IW_QP_ATTR_NEXT_STATE, &attrs, 1);
2261 close_complete_upcall(ep, 0);
2262 __state_set(&ep->com, DEAD);
2272 mutex_unlock(&ep->com.mutex);
2274 c4iw_ep_disconnect(ep, 0, GFP_KERNEL);
2276 release_ep_resources(ep);
2281 * Returns whether an ABORT_REQ_RSS message is a negative advice.
2283 static int is_neg_adv_abort(unsigned int status)
2285 return status == CPL_ERR_RTX_NEG_ADVICE ||
2286 status == CPL_ERR_PERSIST_NEG_ADVICE;
2289 static int peer_abort(struct c4iw_dev *dev, struct sk_buff *skb)
2291 struct cpl_abort_req_rss *req = cplhdr(skb);
2293 struct cpl_abort_rpl *rpl;
2294 struct sk_buff *rpl_skb;
2295 struct c4iw_qp_attributes attrs;
2298 struct tid_info *t = dev->rdev.lldi.tids;
2299 unsigned int tid = GET_TID(req);
2301 ep = lookup_tid(t, tid);
2302 if (is_neg_adv_abort(req->status)) {
2303 PDBG("%s neg_adv_abort ep %p tid %u\n", __func__, ep,
2307 PDBG("%s ep %p tid %u state %u\n", __func__, ep, ep->hwtid,
2309 set_bit(PEER_ABORT, &ep->com.history);
2312 * Wake up any threads in rdma_init() or rdma_fini().
2313 * However, this is not needed if com state is just
2316 if (ep->com.state != MPA_REQ_SENT)
2317 c4iw_wake_up(&ep->com.wr_wait, -ECONNRESET);
2319 mutex_lock(&ep->com.mutex);
2320 switch (ep->com.state) {
2328 if (mpa_rev == 1 || (mpa_rev == 2 && ep->tried_with_mpa_v1))
2329 connect_reply_upcall(ep, -ECONNRESET);
2332 * we just don't send notification upwards because we
2333 * want to retry with mpa_v1 without upper layers even
2336 * do some housekeeping so as to re-initiate the
2339 PDBG("%s: mpa_rev=%d. Retrying with mpav1\n", __func__,
2341 ep->retry_with_mpa_v1 = 1;
2353 if (ep->com.cm_id && ep->com.qp) {
2354 attrs.next_state = C4IW_QP_STATE_ERROR;
2355 ret = c4iw_modify_qp(ep->com.qp->rhp,
2356 ep->com.qp, C4IW_QP_ATTR_NEXT_STATE,
2360 "%s - qp <- error failed!\n",
2363 peer_abort_upcall(ep);
2368 PDBG("%s PEER_ABORT IN DEAD STATE!!!!\n", __func__);
2369 mutex_unlock(&ep->com.mutex);
2375 dst_confirm(ep->dst);
2376 if (ep->com.state != ABORTING) {
2377 __state_set(&ep->com, DEAD);
2378 /* we don't release if we want to retry with mpa_v1 */
2379 if (!ep->retry_with_mpa_v1)
2382 mutex_unlock(&ep->com.mutex);
2384 rpl_skb = get_skb(skb, sizeof(*rpl), GFP_KERNEL);
2386 printk(KERN_ERR MOD "%s - cannot allocate skb!\n",
2391 set_wr_txq(skb, CPL_PRIORITY_DATA, ep->txq_idx);
2392 rpl = (struct cpl_abort_rpl *) skb_put(rpl_skb, sizeof(*rpl));
2393 INIT_TP_WR(rpl, ep->hwtid);
2394 OPCODE_TID(rpl) = cpu_to_be32(MK_OPCODE_TID(CPL_ABORT_RPL, ep->hwtid));
2395 rpl->cmd = CPL_ABORT_NO_RST;
2396 c4iw_ofld_send(&ep->com.dev->rdev, rpl_skb);
2399 release_ep_resources(ep);
2400 else if (ep->retry_with_mpa_v1) {
2401 remove_handle(ep->com.dev, &ep->com.dev->hwtid_idr, ep->hwtid);
2402 cxgb4_remove_tid(ep->com.dev->rdev.lldi.tids, 0, ep->hwtid);
2403 dst_release(ep->dst);
2404 cxgb4_l2t_release(ep->l2t);
2411 static int close_con_rpl(struct c4iw_dev *dev, struct sk_buff *skb)
2414 struct c4iw_qp_attributes attrs;
2415 struct cpl_close_con_rpl *rpl = cplhdr(skb);
2417 struct tid_info *t = dev->rdev.lldi.tids;
2418 unsigned int tid = GET_TID(rpl);
2420 ep = lookup_tid(t, tid);
2422 PDBG("%s ep %p tid %u\n", __func__, ep, ep->hwtid);
2425 /* The cm_id may be null if we failed to connect */
2426 mutex_lock(&ep->com.mutex);
2427 switch (ep->com.state) {
2429 __state_set(&ep->com, MORIBUND);
2433 if ((ep->com.cm_id) && (ep->com.qp)) {
2434 attrs.next_state = C4IW_QP_STATE_IDLE;
2435 c4iw_modify_qp(ep->com.qp->rhp,
2437 C4IW_QP_ATTR_NEXT_STATE,
2440 close_complete_upcall(ep, 0);
2441 __state_set(&ep->com, DEAD);
2451 mutex_unlock(&ep->com.mutex);
2453 release_ep_resources(ep);
2457 static int terminate(struct c4iw_dev *dev, struct sk_buff *skb)
2459 struct cpl_rdma_terminate *rpl = cplhdr(skb);
2460 struct tid_info *t = dev->rdev.lldi.tids;
2461 unsigned int tid = GET_TID(rpl);
2463 struct c4iw_qp_attributes attrs;
2465 ep = lookup_tid(t, tid);
2468 if (ep && ep->com.qp) {
2469 printk(KERN_WARNING MOD "TERM received tid %u qpid %u\n", tid,
2470 ep->com.qp->wq.sq.qid);
2471 attrs.next_state = C4IW_QP_STATE_TERMINATE;
2472 c4iw_modify_qp(ep->com.qp->rhp, ep->com.qp,
2473 C4IW_QP_ATTR_NEXT_STATE, &attrs, 1);
2475 printk(KERN_WARNING MOD "TERM received tid %u no ep/qp\n", tid);
2481 * Upcall from the adapter indicating data has been transmitted.
2482 * For us its just the single MPA request or reply. We can now free
2483 * the skb holding the mpa message.
2485 static int fw4_ack(struct c4iw_dev *dev, struct sk_buff *skb)
2488 struct cpl_fw4_ack *hdr = cplhdr(skb);
2489 u8 credits = hdr->credits;
2490 unsigned int tid = GET_TID(hdr);
2491 struct tid_info *t = dev->rdev.lldi.tids;
2494 ep = lookup_tid(t, tid);
2495 PDBG("%s ep %p tid %u credits %u\n", __func__, ep, ep->hwtid, credits);
2497 PDBG("%s 0 credit ack ep %p tid %u state %u\n",
2498 __func__, ep, ep->hwtid, state_read(&ep->com));
2502 dst_confirm(ep->dst);
2504 PDBG("%s last streaming msg ack ep %p tid %u state %u "
2505 "initiator %u freeing skb\n", __func__, ep, ep->hwtid,
2506 state_read(&ep->com), ep->mpa_attr.initiator ? 1 : 0);
2507 kfree_skb(ep->mpa_skb);
2513 int c4iw_reject_cr(struct iw_cm_id *cm_id, const void *pdata, u8 pdata_len)
2517 struct c4iw_ep *ep = to_ep(cm_id);
2518 PDBG("%s ep %p tid %u\n", __func__, ep, ep->hwtid);
2520 mutex_lock(&ep->com.mutex);
2521 if (ep->com.state == DEAD) {
2522 mutex_unlock(&ep->com.mutex);
2523 c4iw_put_ep(&ep->com);
2526 set_bit(ULP_REJECT, &ep->com.history);
2527 BUG_ON(ep->com.state != MPA_REQ_RCVD);
2529 abort_connection(ep, NULL, GFP_KERNEL);
2531 err = send_mpa_reject(ep, pdata, pdata_len);
2534 mutex_unlock(&ep->com.mutex);
2536 err = c4iw_ep_disconnect(ep, 0, GFP_KERNEL);
2537 c4iw_put_ep(&ep->com);
2541 int c4iw_accept_cr(struct iw_cm_id *cm_id, struct iw_cm_conn_param *conn_param)
2544 struct c4iw_qp_attributes attrs;
2545 enum c4iw_qp_attr_mask mask;
2546 struct c4iw_ep *ep = to_ep(cm_id);
2547 struct c4iw_dev *h = to_c4iw_dev(cm_id->device);
2548 struct c4iw_qp *qp = get_qhp(h, conn_param->qpn);
2550 PDBG("%s ep %p tid %u\n", __func__, ep, ep->hwtid);
2552 mutex_lock(&ep->com.mutex);
2553 if (ep->com.state == DEAD) {
2558 BUG_ON(ep->com.state != MPA_REQ_RCVD);
2561 set_bit(ULP_ACCEPT, &ep->com.history);
2562 if ((conn_param->ord > c4iw_max_read_depth) ||
2563 (conn_param->ird > c4iw_max_read_depth)) {
2564 abort_connection(ep, NULL, GFP_KERNEL);
2569 if (ep->mpa_attr.version == 2 && ep->mpa_attr.enhanced_rdma_conn) {
2570 if (conn_param->ord > ep->ird) {
2571 ep->ird = conn_param->ird;
2572 ep->ord = conn_param->ord;
2573 send_mpa_reject(ep, conn_param->private_data,
2574 conn_param->private_data_len);
2575 abort_connection(ep, NULL, GFP_KERNEL);
2579 if (conn_param->ird > ep->ord) {
2581 conn_param->ird = 1;
2583 abort_connection(ep, NULL, GFP_KERNEL);
2590 ep->ird = conn_param->ird;
2591 ep->ord = conn_param->ord;
2593 if (ep->mpa_attr.version != 2)
2594 if (peer2peer && ep->ird == 0)
2597 PDBG("%s %d ird %d ord %d\n", __func__, __LINE__, ep->ird, ep->ord);
2599 cm_id->add_ref(cm_id);
2600 ep->com.cm_id = cm_id;
2604 /* bind QP to EP and move to RTS */
2605 attrs.mpa_attr = ep->mpa_attr;
2606 attrs.max_ird = ep->ird;
2607 attrs.max_ord = ep->ord;
2608 attrs.llp_stream_handle = ep;
2609 attrs.next_state = C4IW_QP_STATE_RTS;
2611 /* bind QP and TID with INIT_WR */
2612 mask = C4IW_QP_ATTR_NEXT_STATE |
2613 C4IW_QP_ATTR_LLP_STREAM_HANDLE |
2614 C4IW_QP_ATTR_MPA_ATTR |
2615 C4IW_QP_ATTR_MAX_IRD |
2616 C4IW_QP_ATTR_MAX_ORD;
2618 err = c4iw_modify_qp(ep->com.qp->rhp,
2619 ep->com.qp, mask, &attrs, 1);
2622 err = send_mpa_reply(ep, conn_param->private_data,
2623 conn_param->private_data_len);
2627 __state_set(&ep->com, FPDU_MODE);
2628 established_upcall(ep);
2629 mutex_unlock(&ep->com.mutex);
2630 c4iw_put_ep(&ep->com);
2633 ep->com.cm_id = NULL;
2634 cm_id->rem_ref(cm_id);
2636 mutex_unlock(&ep->com.mutex);
2637 c4iw_put_ep(&ep->com);
2641 static int pick_local_ipaddrs(struct c4iw_dev *dev, struct iw_cm_id *cm_id)
2643 struct in_device *ind;
2645 struct sockaddr_in *laddr = (struct sockaddr_in *)&cm_id->local_addr;
2646 struct sockaddr_in *raddr = (struct sockaddr_in *)&cm_id->remote_addr;
2648 ind = in_dev_get(dev->rdev.lldi.ports[0]);
2650 return -EADDRNOTAVAIL;
2651 for_primary_ifa(ind) {
2652 laddr->sin_addr.s_addr = ifa->ifa_address;
2653 raddr->sin_addr.s_addr = ifa->ifa_address;
2659 return found ? 0 : -EADDRNOTAVAIL;
2662 static int get_lladdr(struct net_device *dev, struct in6_addr *addr,
2663 unsigned char banned_flags)
2665 struct inet6_dev *idev;
2666 int err = -EADDRNOTAVAIL;
2669 idev = __in6_dev_get(dev);
2671 struct inet6_ifaddr *ifp;
2673 read_lock_bh(&idev->lock);
2674 list_for_each_entry(ifp, &idev->addr_list, if_list) {
2675 if (ifp->scope == IFA_LINK &&
2676 !(ifp->flags & banned_flags)) {
2677 memcpy(addr, &ifp->addr, 16);
2682 read_unlock_bh(&idev->lock);
2688 static int pick_local_ip6addrs(struct c4iw_dev *dev, struct iw_cm_id *cm_id)
2690 struct in6_addr uninitialized_var(addr);
2691 struct sockaddr_in6 *la6 = (struct sockaddr_in6 *)&cm_id->local_addr;
2692 struct sockaddr_in6 *ra6 = (struct sockaddr_in6 *)&cm_id->remote_addr;
2694 if (get_lladdr(dev->rdev.lldi.ports[0], &addr, IFA_F_TENTATIVE)) {
2695 memcpy(la6->sin6_addr.s6_addr, &addr, 16);
2696 memcpy(ra6->sin6_addr.s6_addr, &addr, 16);
2699 return -EADDRNOTAVAIL;
2702 int c4iw_connect(struct iw_cm_id *cm_id, struct iw_cm_conn_param *conn_param)
2704 struct c4iw_dev *dev = to_c4iw_dev(cm_id->device);
2707 struct sockaddr_in *laddr = (struct sockaddr_in *)&cm_id->local_addr;
2708 struct sockaddr_in *raddr = (struct sockaddr_in *)&cm_id->remote_addr;
2709 struct sockaddr_in6 *laddr6 = (struct sockaddr_in6 *)&cm_id->local_addr;
2710 struct sockaddr_in6 *raddr6 = (struct sockaddr_in6 *)
2711 &cm_id->remote_addr;
2715 if ((conn_param->ord > c4iw_max_read_depth) ||
2716 (conn_param->ird > c4iw_max_read_depth)) {
2720 ep = alloc_ep(sizeof(*ep), GFP_KERNEL);
2722 printk(KERN_ERR MOD "%s - cannot alloc ep.\n", __func__);
2726 init_timer(&ep->timer);
2727 ep->plen = conn_param->private_data_len;
2729 memcpy(ep->mpa_pkt + sizeof(struct mpa_message),
2730 conn_param->private_data, ep->plen);
2731 ep->ird = conn_param->ird;
2732 ep->ord = conn_param->ord;
2734 if (peer2peer && ep->ord == 0)
2737 cm_id->add_ref(cm_id);
2739 ep->com.cm_id = cm_id;
2740 ep->com.qp = get_qhp(dev, conn_param->qpn);
2742 PDBG("%s qpn 0x%x not found!\n", __func__, conn_param->qpn);
2747 PDBG("%s qpn 0x%x qp %p cm_id %p\n", __func__, conn_param->qpn,
2751 * Allocate an active TID to initiate a TCP connection.
2753 ep->atid = cxgb4_alloc_atid(dev->rdev.lldi.tids, ep);
2754 if (ep->atid == -1) {
2755 printk(KERN_ERR MOD "%s - cannot alloc atid.\n", __func__);
2759 insert_handle(dev, &dev->atid_idr, ep, ep->atid);
2761 if (cm_id->remote_addr.ss_family == AF_INET) {
2763 ra = (__u8 *)&raddr->sin_addr;
2766 * Handle loopback requests to INADDR_ANY.
2768 if ((__force int)raddr->sin_addr.s_addr == INADDR_ANY) {
2769 err = pick_local_ipaddrs(dev, cm_id);
2775 PDBG("%s saddr %pI4 sport 0x%x raddr %pI4 rport 0x%x\n",
2776 __func__, &laddr->sin_addr, ntohs(laddr->sin_port),
2777 ra, ntohs(raddr->sin_port));
2778 ep->dst = find_route(dev, laddr->sin_addr.s_addr,
2779 raddr->sin_addr.s_addr, laddr->sin_port,
2780 raddr->sin_port, 0);
2783 ra = (__u8 *)&raddr6->sin6_addr;
2786 * Handle loopback requests to INADDR_ANY.
2788 if (ipv6_addr_type(&raddr6->sin6_addr) == IPV6_ADDR_ANY) {
2789 err = pick_local_ip6addrs(dev, cm_id);
2795 PDBG("%s saddr %pI6 sport 0x%x raddr %pI6 rport 0x%x\n",
2796 __func__, laddr6->sin6_addr.s6_addr,
2797 ntohs(laddr6->sin6_port),
2798 raddr6->sin6_addr.s6_addr, ntohs(raddr6->sin6_port));
2799 ep->dst = find_route6(dev, laddr6->sin6_addr.s6_addr,
2800 raddr6->sin6_addr.s6_addr,
2801 laddr6->sin6_port, raddr6->sin6_port, 0,
2802 raddr6->sin6_scope_id);
2805 printk(KERN_ERR MOD "%s - cannot find route.\n", __func__);
2806 err = -EHOSTUNREACH;
2810 err = import_ep(ep, iptype, ra, ep->dst, ep->com.dev, true);
2812 printk(KERN_ERR MOD "%s - cannot alloc l2e.\n", __func__);
2816 PDBG("%s txq_idx %u tx_chan %u smac_idx %u rss_qid %u l2t_idx %u\n",
2817 __func__, ep->txq_idx, ep->tx_chan, ep->smac_idx, ep->rss_qid,
2820 state_set(&ep->com, CONNECTING);
2822 memcpy(&ep->com.local_addr, &cm_id->local_addr,
2823 sizeof(ep->com.local_addr));
2824 memcpy(&ep->com.remote_addr, &cm_id->remote_addr,
2825 sizeof(ep->com.remote_addr));
2827 /* send connect request to rnic */
2828 err = send_connect(ep);
2832 cxgb4_l2t_release(ep->l2t);
2834 dst_release(ep->dst);
2836 remove_handle(ep->com.dev, &ep->com.dev->atid_idr, ep->atid);
2837 cxgb4_free_atid(ep->com.dev->rdev.lldi.tids, ep->atid);
2839 cm_id->rem_ref(cm_id);
2840 c4iw_put_ep(&ep->com);
2845 static int create_server6(struct c4iw_dev *dev, struct c4iw_listen_ep *ep)
2848 struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *)&ep->com.local_addr;
2850 c4iw_init_wr_wait(&ep->com.wr_wait);
2851 err = cxgb4_create_server6(ep->com.dev->rdev.lldi.ports[0],
2852 ep->stid, &sin6->sin6_addr,
2854 ep->com.dev->rdev.lldi.rxq_ids[0]);
2856 err = c4iw_wait_for_reply(&ep->com.dev->rdev,
2860 pr_err("cxgb4_create_server6/filter failed err %d stid %d laddr %pI6 lport %d\n",
2862 sin6->sin6_addr.s6_addr, ntohs(sin6->sin6_port));
2866 static int create_server4(struct c4iw_dev *dev, struct c4iw_listen_ep *ep)
2869 struct sockaddr_in *sin = (struct sockaddr_in *)&ep->com.local_addr;
2871 if (dev->rdev.lldi.enable_fw_ofld_conn) {
2873 err = cxgb4_create_server_filter(
2874 ep->com.dev->rdev.lldi.ports[0], ep->stid,
2875 sin->sin_addr.s_addr, sin->sin_port, 0,
2876 ep->com.dev->rdev.lldi.rxq_ids[0], 0, 0);
2877 if (err == -EBUSY) {
2878 set_current_state(TASK_UNINTERRUPTIBLE);
2879 schedule_timeout(usecs_to_jiffies(100));
2881 } while (err == -EBUSY);
2883 c4iw_init_wr_wait(&ep->com.wr_wait);
2884 err = cxgb4_create_server(ep->com.dev->rdev.lldi.ports[0],
2885 ep->stid, sin->sin_addr.s_addr, sin->sin_port,
2886 0, ep->com.dev->rdev.lldi.rxq_ids[0]);
2888 err = c4iw_wait_for_reply(&ep->com.dev->rdev,
2893 pr_err("cxgb4_create_server/filter failed err %d stid %d laddr %pI4 lport %d\n"
2895 &sin->sin_addr, ntohs(sin->sin_port));
2899 int c4iw_create_listen(struct iw_cm_id *cm_id, int backlog)
2902 struct c4iw_dev *dev = to_c4iw_dev(cm_id->device);
2903 struct c4iw_listen_ep *ep;
2907 ep = alloc_ep(sizeof(*ep), GFP_KERNEL);
2909 printk(KERN_ERR MOD "%s - cannot alloc ep.\n", __func__);
2913 PDBG("%s ep %p\n", __func__, ep);
2914 cm_id->add_ref(cm_id);
2915 ep->com.cm_id = cm_id;
2917 ep->backlog = backlog;
2918 memcpy(&ep->com.local_addr, &cm_id->local_addr,
2919 sizeof(ep->com.local_addr));
2922 * Allocate a server TID.
2924 if (dev->rdev.lldi.enable_fw_ofld_conn &&
2925 ep->com.local_addr.ss_family == AF_INET)
2926 ep->stid = cxgb4_alloc_sftid(dev->rdev.lldi.tids,
2927 cm_id->local_addr.ss_family, ep);
2929 ep->stid = cxgb4_alloc_stid(dev->rdev.lldi.tids,
2930 cm_id->local_addr.ss_family, ep);
2932 if (ep->stid == -1) {
2933 printk(KERN_ERR MOD "%s - cannot alloc stid.\n", __func__);
2937 insert_handle(dev, &dev->stid_idr, ep, ep->stid);
2938 state_set(&ep->com, LISTEN);
2939 if (ep->com.local_addr.ss_family == AF_INET)
2940 err = create_server4(dev, ep);
2942 err = create_server6(dev, ep);
2944 cm_id->provider_data = ep;
2947 cxgb4_free_stid(ep->com.dev->rdev.lldi.tids, ep->stid,
2948 ep->com.local_addr.ss_family);
2950 cm_id->rem_ref(cm_id);
2951 c4iw_put_ep(&ep->com);
2957 int c4iw_destroy_listen(struct iw_cm_id *cm_id)
2960 struct c4iw_listen_ep *ep = to_listen_ep(cm_id);
2962 PDBG("%s ep %p\n", __func__, ep);
2965 state_set(&ep->com, DEAD);
2966 if (ep->com.dev->rdev.lldi.enable_fw_ofld_conn &&
2967 ep->com.local_addr.ss_family == AF_INET) {
2968 err = cxgb4_remove_server_filter(
2969 ep->com.dev->rdev.lldi.ports[0], ep->stid,
2970 ep->com.dev->rdev.lldi.rxq_ids[0], 0);
2972 c4iw_init_wr_wait(&ep->com.wr_wait);
2973 err = cxgb4_remove_server(
2974 ep->com.dev->rdev.lldi.ports[0], ep->stid,
2975 ep->com.dev->rdev.lldi.rxq_ids[0], 0);
2978 err = c4iw_wait_for_reply(&ep->com.dev->rdev, &ep->com.wr_wait,
2981 remove_handle(ep->com.dev, &ep->com.dev->stid_idr, ep->stid);
2982 cxgb4_free_stid(ep->com.dev->rdev.lldi.tids, ep->stid,
2983 ep->com.local_addr.ss_family);
2985 cm_id->rem_ref(cm_id);
2986 c4iw_put_ep(&ep->com);
2990 int c4iw_ep_disconnect(struct c4iw_ep *ep, int abrupt, gfp_t gfp)
2995 struct c4iw_rdev *rdev;
2997 mutex_lock(&ep->com.mutex);
2999 PDBG("%s ep %p state %s, abrupt %d\n", __func__, ep,
3000 states[ep->com.state], abrupt);
3002 rdev = &ep->com.dev->rdev;
3003 if (c4iw_fatal_error(rdev)) {
3005 close_complete_upcall(ep, -EIO);
3006 ep->com.state = DEAD;
3008 switch (ep->com.state) {
3016 ep->com.state = ABORTING;
3018 ep->com.state = CLOSING;
3021 set_bit(CLOSE_SENT, &ep->com.flags);
3024 if (!test_and_set_bit(CLOSE_SENT, &ep->com.flags)) {
3028 ep->com.state = ABORTING;
3030 ep->com.state = MORIBUND;
3036 PDBG("%s ignoring disconnect ep %p state %u\n",
3037 __func__, ep, ep->com.state);
3046 set_bit(EP_DISC_ABORT, &ep->com.history);
3047 close_complete_upcall(ep, -ECONNRESET);
3048 ret = send_abort(ep, NULL, gfp);
3050 set_bit(EP_DISC_CLOSE, &ep->com.history);
3051 ret = send_halfclose(ep, gfp);
3056 mutex_unlock(&ep->com.mutex);
3058 release_ep_resources(ep);
3062 static void active_ofld_conn_reply(struct c4iw_dev *dev, struct sk_buff *skb,
3063 struct cpl_fw6_msg_ofld_connection_wr_rpl *req)
3066 int atid = be32_to_cpu(req->tid);
3068 ep = (struct c4iw_ep *)lookup_atid(dev->rdev.lldi.tids,
3069 (__force u32) req->tid);
3073 switch (req->retval) {
3075 set_bit(ACT_RETRY_NOMEM, &ep->com.history);
3076 if (ep->retry_count++ < ACT_OPEN_RETRY_COUNT) {
3077 send_fw_act_open_req(ep, atid);
3081 set_bit(ACT_RETRY_INUSE, &ep->com.history);
3082 if (ep->retry_count++ < ACT_OPEN_RETRY_COUNT) {
3083 send_fw_act_open_req(ep, atid);
3088 pr_info("%s unexpected ofld conn wr retval %d\n",
3089 __func__, req->retval);
3092 pr_err("active ofld_connect_wr failure %d atid %d\n",
3094 mutex_lock(&dev->rdev.stats.lock);
3095 dev->rdev.stats.act_ofld_conn_fails++;
3096 mutex_unlock(&dev->rdev.stats.lock);
3097 connect_reply_upcall(ep, status2errno(req->retval));
3098 state_set(&ep->com, DEAD);
3099 remove_handle(dev, &dev->atid_idr, atid);
3100 cxgb4_free_atid(dev->rdev.lldi.tids, atid);
3101 dst_release(ep->dst);
3102 cxgb4_l2t_release(ep->l2t);
3103 c4iw_put_ep(&ep->com);
3106 static void passive_ofld_conn_reply(struct c4iw_dev *dev, struct sk_buff *skb,
3107 struct cpl_fw6_msg_ofld_connection_wr_rpl *req)
3109 struct sk_buff *rpl_skb;
3110 struct cpl_pass_accept_req *cpl;
3113 rpl_skb = (struct sk_buff *)(unsigned long)req->cookie;
3116 PDBG("%s passive open failure %d\n", __func__, req->retval);
3117 mutex_lock(&dev->rdev.stats.lock);
3118 dev->rdev.stats.pas_ofld_conn_fails++;
3119 mutex_unlock(&dev->rdev.stats.lock);
3122 cpl = (struct cpl_pass_accept_req *)cplhdr(rpl_skb);
3123 OPCODE_TID(cpl) = htonl(MK_OPCODE_TID(CPL_PASS_ACCEPT_REQ,
3124 (__force u32) htonl(
3125 (__force u32) req->tid)));
3126 ret = pass_accept_req(dev, rpl_skb);
3133 static int deferred_fw6_msg(struct c4iw_dev *dev, struct sk_buff *skb)
3135 struct cpl_fw6_msg *rpl = cplhdr(skb);
3136 struct cpl_fw6_msg_ofld_connection_wr_rpl *req;
3138 switch (rpl->type) {
3140 c4iw_ev_dispatch(dev, (struct t4_cqe *)&rpl->data[0]);
3142 case FW6_TYPE_OFLD_CONNECTION_WR_RPL:
3143 req = (struct cpl_fw6_msg_ofld_connection_wr_rpl *)rpl->data;
3144 switch (req->t_state) {
3146 active_ofld_conn_reply(dev, skb, req);
3149 passive_ofld_conn_reply(dev, skb, req);
3152 pr_err("%s unexpected ofld conn wr state %d\n",
3153 __func__, req->t_state);
3161 static void build_cpl_pass_accept_req(struct sk_buff *skb, int stid , u8 tos)
3164 u16 vlantag, len, hdr_len, eth_hdr_len;
3166 struct cpl_rx_pkt *cpl = cplhdr(skb);
3167 struct cpl_pass_accept_req *req;
3168 struct tcp_options_received tmp_opt;
3169 struct c4iw_dev *dev;
3171 dev = *((struct c4iw_dev **) (skb->cb + sizeof(void *)));
3172 /* Store values from cpl_rx_pkt in temporary location. */
3173 vlantag = (__force u16) cpl->vlan;
3174 len = (__force u16) cpl->len;
3175 l2info = (__force u32) cpl->l2info;
3176 hdr_len = (__force u16) cpl->hdr_len;
3179 __skb_pull(skb, sizeof(*req) + sizeof(struct rss_header));
3182 * We need to parse the TCP options from SYN packet.
3183 * to generate cpl_pass_accept_req.
3185 memset(&tmp_opt, 0, sizeof(tmp_opt));
3186 tcp_clear_options(&tmp_opt);
3187 tcp_parse_options(skb, &tmp_opt, 0, NULL);
3189 req = (struct cpl_pass_accept_req *)__skb_push(skb, sizeof(*req));
3190 memset(req, 0, sizeof(*req));
3191 req->l2info = cpu_to_be16(V_SYN_INTF(intf) |
3192 V_SYN_MAC_IDX(G_RX_MACIDX(
3193 (__force int) htonl(l2info))) |
3195 eth_hdr_len = is_t4(dev->rdev.lldi.adapter_type) ?
3196 G_RX_ETHHDR_LEN((__force int) htonl(l2info)) :
3197 G_RX_T5_ETHHDR_LEN((__force int) htonl(l2info));
3198 req->hdr_len = cpu_to_be32(V_SYN_RX_CHAN(G_RX_CHAN(
3199 (__force int) htonl(l2info))) |
3200 V_TCP_HDR_LEN(G_RX_TCPHDR_LEN(
3201 (__force int) htons(hdr_len))) |
3202 V_IP_HDR_LEN(G_RX_IPHDR_LEN(
3203 (__force int) htons(hdr_len))) |
3204 V_ETH_HDR_LEN(G_RX_ETHHDR_LEN(eth_hdr_len)));
3205 req->vlan = (__force __be16) vlantag;
3206 req->len = (__force __be16) len;
3207 req->tos_stid = cpu_to_be32(PASS_OPEN_TID(stid) |
3208 PASS_OPEN_TOS(tos));
3209 req->tcpopt.mss = htons(tmp_opt.mss_clamp);
3210 if (tmp_opt.wscale_ok)
3211 req->tcpopt.wsf = tmp_opt.snd_wscale;
3212 req->tcpopt.tstamp = tmp_opt.saw_tstamp;
3213 if (tmp_opt.sack_ok)
3214 req->tcpopt.sack = 1;
3215 OPCODE_TID(req) = htonl(MK_OPCODE_TID(CPL_PASS_ACCEPT_REQ, 0));
3219 static void send_fw_pass_open_req(struct c4iw_dev *dev, struct sk_buff *skb,
3220 __be32 laddr, __be16 lport,
3221 __be32 raddr, __be16 rport,
3222 u32 rcv_isn, u32 filter, u16 window,
3223 u32 rss_qid, u8 port_id)
3225 struct sk_buff *req_skb;
3226 struct fw_ofld_connection_wr *req;
3227 struct cpl_pass_accept_req *cpl = cplhdr(skb);
3230 req_skb = alloc_skb(sizeof(struct fw_ofld_connection_wr), GFP_KERNEL);
3231 req = (struct fw_ofld_connection_wr *)__skb_put(req_skb, sizeof(*req));
3232 memset(req, 0, sizeof(*req));
3233 req->op_compl = htonl(V_WR_OP(FW_OFLD_CONNECTION_WR) | FW_WR_COMPL(1));
3234 req->len16_pkd = htonl(FW_WR_LEN16(DIV_ROUND_UP(sizeof(*req), 16)));
3235 req->le.version_cpl = htonl(F_FW_OFLD_CONNECTION_WR_CPL);
3236 req->le.filter = (__force __be32) filter;
3237 req->le.lport = lport;
3238 req->le.pport = rport;
3239 req->le.u.ipv4.lip = laddr;
3240 req->le.u.ipv4.pip = raddr;
3241 req->tcb.rcv_nxt = htonl(rcv_isn + 1);
3242 req->tcb.rcv_adv = htons(window);
3243 req->tcb.t_state_to_astid =
3244 htonl(V_FW_OFLD_CONNECTION_WR_T_STATE(TCP_SYN_RECV) |
3245 V_FW_OFLD_CONNECTION_WR_RCV_SCALE(cpl->tcpopt.wsf) |
3246 V_FW_OFLD_CONNECTION_WR_ASTID(
3247 GET_PASS_OPEN_TID(ntohl(cpl->tos_stid))));
3250 * We store the qid in opt2 which will be used by the firmware
3251 * to send us the wr response.
3253 req->tcb.opt2 = htonl(V_RSS_QUEUE(rss_qid));
3256 * We initialize the MSS index in TCB to 0xF.
3257 * So that when driver sends cpl_pass_accept_rpl
3258 * TCB picks up the correct value. If this was 0
3259 * TP will ignore any value > 0 for MSS index.
3261 req->tcb.opt0 = cpu_to_be64(V_MSS_IDX(0xF));
3262 req->cookie = (unsigned long)skb;
3264 set_wr_txq(req_skb, CPL_PRIORITY_CONTROL, port_id);
3265 ret = cxgb4_ofld_send(dev->rdev.lldi.ports[0], req_skb);
3267 pr_err("%s - cxgb4_ofld_send error %d - dropping\n", __func__,
3275 * Handler for CPL_RX_PKT message. Need to handle cpl_rx_pkt
3276 * messages when a filter is being used instead of server to
3277 * redirect a syn packet. When packets hit filter they are redirected
3278 * to the offload queue and driver tries to establish the connection
3279 * using firmware work request.
3281 static int rx_pkt(struct c4iw_dev *dev, struct sk_buff *skb)
3284 unsigned int filter;
3285 struct ethhdr *eh = NULL;
3286 struct vlan_ethhdr *vlan_eh = NULL;
3288 struct tcphdr *tcph;
3289 struct rss_header *rss = (void *)skb->data;
3290 struct cpl_rx_pkt *cpl = (void *)skb->data;
3291 struct cpl_pass_accept_req *req = (void *)(rss + 1);
3292 struct l2t_entry *e;
3293 struct dst_entry *dst;
3294 struct c4iw_ep *lep;
3296 struct port_info *pi;
3297 struct net_device *pdev;
3298 u16 rss_qid, eth_hdr_len;
3301 struct neighbour *neigh;
3303 /* Drop all non-SYN packets */
3304 if (!(cpl->l2info & cpu_to_be32(F_RXF_SYN)))
3308 * Drop all packets which did not hit the filter.
3309 * Unlikely to happen.
3311 if (!(rss->filter_hit && rss->filter_tid))
3315 * Calculate the server tid from filter hit index from cpl_rx_pkt.
3317 stid = (__force int) cpu_to_be32((__force u32) rss->hash_val);
3319 lep = (struct c4iw_ep *)lookup_stid(dev->rdev.lldi.tids, stid);
3321 PDBG("%s connect request on invalid stid %d\n", __func__, stid);
3325 eth_hdr_len = is_t4(dev->rdev.lldi.adapter_type) ?
3326 G_RX_ETHHDR_LEN(htonl(cpl->l2info)) :
3327 G_RX_T5_ETHHDR_LEN(htonl(cpl->l2info));
3328 if (eth_hdr_len == ETH_HLEN) {
3329 eh = (struct ethhdr *)(req + 1);
3330 iph = (struct iphdr *)(eh + 1);
3332 vlan_eh = (struct vlan_ethhdr *)(req + 1);
3333 iph = (struct iphdr *)(vlan_eh + 1);
3334 skb->vlan_tci = ntohs(cpl->vlan);
3337 if (iph->version != 0x4)
3340 tcph = (struct tcphdr *)(iph + 1);
3341 skb_set_network_header(skb, (void *)iph - (void *)rss);
3342 skb_set_transport_header(skb, (void *)tcph - (void *)rss);
3345 PDBG("%s lip 0x%x lport %u pip 0x%x pport %u tos %d\n", __func__,
3346 ntohl(iph->daddr), ntohs(tcph->dest), ntohl(iph->saddr),
3347 ntohs(tcph->source), iph->tos);
3349 dst = find_route(dev, iph->daddr, iph->saddr, tcph->dest, tcph->source,
3352 pr_err("%s - failed to find dst entry!\n",
3356 neigh = dst_neigh_lookup_skb(dst, skb);
3359 pr_err("%s - failed to allocate neigh!\n",
3364 if (neigh->dev->flags & IFF_LOOPBACK) {
3365 pdev = ip_dev_find(&init_net, iph->daddr);
3366 e = cxgb4_l2t_get(dev->rdev.lldi.l2t, neigh,
3368 pi = (struct port_info *)netdev_priv(pdev);
3369 tx_chan = cxgb4_port_chan(pdev);
3372 pdev = get_real_dev(neigh->dev);
3373 e = cxgb4_l2t_get(dev->rdev.lldi.l2t, neigh,
3375 pi = (struct port_info *)netdev_priv(pdev);
3376 tx_chan = cxgb4_port_chan(pdev);
3378 neigh_release(neigh);
3380 pr_err("%s - failed to allocate l2t entry!\n",
3385 step = dev->rdev.lldi.nrxq / dev->rdev.lldi.nchan;
3386 rss_qid = dev->rdev.lldi.rxq_ids[pi->port_id * step];
3387 window = (__force u16) htons((__force u16)tcph->window);
3389 /* Calcuate filter portion for LE region. */
3390 filter = (__force unsigned int) cpu_to_be32(cxgb4_select_ntuple(
3391 dev->rdev.lldi.ports[0],
3395 * Synthesize the cpl_pass_accept_req. We have everything except the
3396 * TID. Once firmware sends a reply with TID we update the TID field
3397 * in cpl and pass it through the regular cpl_pass_accept_req path.
3399 build_cpl_pass_accept_req(skb, stid, iph->tos);
3400 send_fw_pass_open_req(dev, skb, iph->daddr, tcph->dest, iph->saddr,
3401 tcph->source, ntohl(tcph->seq), filter, window,
3402 rss_qid, pi->port_id);
3403 cxgb4_l2t_release(e);
3411 * These are the real handlers that are called from a
3414 static c4iw_handler_func work_handlers[NUM_CPL_CMDS] = {
3415 [CPL_ACT_ESTABLISH] = act_establish,
3416 [CPL_ACT_OPEN_RPL] = act_open_rpl,
3417 [CPL_RX_DATA] = rx_data,
3418 [CPL_ABORT_RPL_RSS] = abort_rpl,
3419 [CPL_ABORT_RPL] = abort_rpl,
3420 [CPL_PASS_OPEN_RPL] = pass_open_rpl,
3421 [CPL_CLOSE_LISTSRV_RPL] = close_listsrv_rpl,
3422 [CPL_PASS_ACCEPT_REQ] = pass_accept_req,
3423 [CPL_PASS_ESTABLISH] = pass_establish,
3424 [CPL_PEER_CLOSE] = peer_close,
3425 [CPL_ABORT_REQ_RSS] = peer_abort,
3426 [CPL_CLOSE_CON_RPL] = close_con_rpl,
3427 [CPL_RDMA_TERMINATE] = terminate,
3428 [CPL_FW4_ACK] = fw4_ack,
3429 [CPL_FW6_MSG] = deferred_fw6_msg,
3430 [CPL_RX_PKT] = rx_pkt
3433 static void process_timeout(struct c4iw_ep *ep)
3435 struct c4iw_qp_attributes attrs;
3438 mutex_lock(&ep->com.mutex);
3439 PDBG("%s ep %p tid %u state %d\n", __func__, ep, ep->hwtid,
3441 set_bit(TIMEDOUT, &ep->com.history);
3442 switch (ep->com.state) {
3444 __state_set(&ep->com, ABORTING);
3445 connect_reply_upcall(ep, -ETIMEDOUT);
3448 __state_set(&ep->com, ABORTING);
3452 if (ep->com.cm_id && ep->com.qp) {
3453 attrs.next_state = C4IW_QP_STATE_ERROR;
3454 c4iw_modify_qp(ep->com.qp->rhp,
3455 ep->com.qp, C4IW_QP_ATTR_NEXT_STATE,
3458 __state_set(&ep->com, ABORTING);
3459 close_complete_upcall(ep, -ETIMEDOUT);
3462 WARN(1, "%s unexpected state ep %p tid %u state %u\n",
3463 __func__, ep, ep->hwtid, ep->com.state);
3466 mutex_unlock(&ep->com.mutex);
3468 abort_connection(ep, NULL, GFP_KERNEL);
3469 c4iw_put_ep(&ep->com);
3472 static void process_timedout_eps(void)
3476 spin_lock_irq(&timeout_lock);
3477 while (!list_empty(&timeout_list)) {
3478 struct list_head *tmp;
3480 tmp = timeout_list.next;
3482 spin_unlock_irq(&timeout_lock);
3483 ep = list_entry(tmp, struct c4iw_ep, entry);
3484 process_timeout(ep);
3485 spin_lock_irq(&timeout_lock);
3487 spin_unlock_irq(&timeout_lock);
3490 static void process_work(struct work_struct *work)
3492 struct sk_buff *skb = NULL;
3493 struct c4iw_dev *dev;
3494 struct cpl_act_establish *rpl;
3495 unsigned int opcode;
3498 while ((skb = skb_dequeue(&rxq))) {
3500 dev = *((struct c4iw_dev **) (skb->cb + sizeof(void *)));
3501 opcode = rpl->ot.opcode;
3503 BUG_ON(!work_handlers[opcode]);
3504 ret = work_handlers[opcode](dev, skb);
3508 process_timedout_eps();
3511 static DECLARE_WORK(skb_work, process_work);
3513 static void ep_timeout(unsigned long arg)
3515 struct c4iw_ep *ep = (struct c4iw_ep *)arg;
3518 spin_lock(&timeout_lock);
3519 if (!test_and_set_bit(TIMEOUT, &ep->com.flags)) {
3520 list_add_tail(&ep->entry, &timeout_list);
3523 spin_unlock(&timeout_lock);
3525 queue_work(workq, &skb_work);
3529 * All the CM events are handled on a work queue to have a safe context.
3531 static int sched(struct c4iw_dev *dev, struct sk_buff *skb)
3535 * Save dev in the skb->cb area.
3537 *((struct c4iw_dev **) (skb->cb + sizeof(void *))) = dev;
3540 * Queue the skb and schedule the worker thread.
3542 skb_queue_tail(&rxq, skb);
3543 queue_work(workq, &skb_work);
3547 static int set_tcb_rpl(struct c4iw_dev *dev, struct sk_buff *skb)
3549 struct cpl_set_tcb_rpl *rpl = cplhdr(skb);
3551 if (rpl->status != CPL_ERR_NONE) {
3552 printk(KERN_ERR MOD "Unexpected SET_TCB_RPL status %u "
3553 "for tid %u\n", rpl->status, GET_TID(rpl));
3559 static int fw6_msg(struct c4iw_dev *dev, struct sk_buff *skb)
3561 struct cpl_fw6_msg *rpl = cplhdr(skb);
3562 struct c4iw_wr_wait *wr_waitp;
3565 PDBG("%s type %u\n", __func__, rpl->type);
3567 switch (rpl->type) {
3568 case FW6_TYPE_WR_RPL:
3569 ret = (int)((be64_to_cpu(rpl->data[0]) >> 8) & 0xff);
3570 wr_waitp = (struct c4iw_wr_wait *)(__force unsigned long) rpl->data[1];
3571 PDBG("%s wr_waitp %p ret %u\n", __func__, wr_waitp, ret);
3573 c4iw_wake_up(wr_waitp, ret ? -ret : 0);
3577 case FW6_TYPE_OFLD_CONNECTION_WR_RPL:
3581 printk(KERN_ERR MOD "%s unexpected fw6 msg type %u\n", __func__,
3589 static int peer_abort_intr(struct c4iw_dev *dev, struct sk_buff *skb)
3591 struct cpl_abort_req_rss *req = cplhdr(skb);
3593 struct tid_info *t = dev->rdev.lldi.tids;
3594 unsigned int tid = GET_TID(req);
3596 ep = lookup_tid(t, tid);
3598 printk(KERN_WARNING MOD
3599 "Abort on non-existent endpoint, tid %d\n", tid);
3603 if (is_neg_adv_abort(req->status)) {
3604 PDBG("%s neg_adv_abort ep %p tid %u\n", __func__, ep,
3609 PDBG("%s ep %p tid %u state %u\n", __func__, ep, ep->hwtid,
3613 * Wake up any threads in rdma_init() or rdma_fini().
3614 * However, if we are on MPAv2 and want to retry with MPAv1
3615 * then, don't wake up yet.
3617 if (mpa_rev == 2 && !ep->tried_with_mpa_v1) {
3618 if (ep->com.state != MPA_REQ_SENT)
3619 c4iw_wake_up(&ep->com.wr_wait, -ECONNRESET);
3621 c4iw_wake_up(&ep->com.wr_wait, -ECONNRESET);
3627 * Most upcalls from the T4 Core go to sched() to
3628 * schedule the processing on a work queue.
3630 c4iw_handler_func c4iw_handlers[NUM_CPL_CMDS] = {
3631 [CPL_ACT_ESTABLISH] = sched,
3632 [CPL_ACT_OPEN_RPL] = sched,
3633 [CPL_RX_DATA] = sched,
3634 [CPL_ABORT_RPL_RSS] = sched,
3635 [CPL_ABORT_RPL] = sched,
3636 [CPL_PASS_OPEN_RPL] = sched,
3637 [CPL_CLOSE_LISTSRV_RPL] = sched,
3638 [CPL_PASS_ACCEPT_REQ] = sched,
3639 [CPL_PASS_ESTABLISH] = sched,
3640 [CPL_PEER_CLOSE] = sched,
3641 [CPL_CLOSE_CON_RPL] = sched,
3642 [CPL_ABORT_REQ_RSS] = peer_abort_intr,
3643 [CPL_RDMA_TERMINATE] = sched,
3644 [CPL_FW4_ACK] = sched,
3645 [CPL_SET_TCB_RPL] = set_tcb_rpl,
3646 [CPL_FW6_MSG] = fw6_msg,
3647 [CPL_RX_PKT] = sched
3650 int __init c4iw_cm_init(void)
3652 spin_lock_init(&timeout_lock);
3653 skb_queue_head_init(&rxq);
3655 workq = create_singlethread_workqueue("iw_cxgb4");
3662 void __exit c4iw_cm_term(void)
3664 WARN_ON(!list_empty(&timeout_list));
3665 flush_workqueue(workq);
3666 destroy_workqueue(workq);