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;
102 module_param(peer2peer, int, 0644);
103 MODULE_PARM_DESC(peer2peer, "Support peer2peer ULPs (default=0)");
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 dst_release(&rt->dst);
411 static void arp_failure_discard(void *handle, struct sk_buff *skb)
413 PDBG("%s c4iw_dev %p\n", __func__, handle);
418 * Handle an ARP failure for an active open.
420 static void act_open_req_arp_failure(void *handle, struct sk_buff *skb)
422 printk(KERN_ERR MOD "ARP failure duing connect\n");
427 * Handle an ARP failure for a CPL_ABORT_REQ. Change it into a no RST variant
430 static void abort_arp_failure(void *handle, struct sk_buff *skb)
432 struct c4iw_rdev *rdev = handle;
433 struct cpl_abort_req *req = cplhdr(skb);
435 PDBG("%s rdev %p\n", __func__, rdev);
436 req->cmd = CPL_ABORT_NO_RST;
437 c4iw_ofld_send(rdev, skb);
440 static void send_flowc(struct c4iw_ep *ep, struct sk_buff *skb)
442 unsigned int flowclen = 80;
443 struct fw_flowc_wr *flowc;
446 skb = get_skb(skb, flowclen, GFP_KERNEL);
447 flowc = (struct fw_flowc_wr *)__skb_put(skb, flowclen);
449 flowc->op_to_nparams = cpu_to_be32(FW_WR_OP(FW_FLOWC_WR) |
450 FW_FLOWC_WR_NPARAMS(8));
451 flowc->flowid_len16 = cpu_to_be32(FW_WR_LEN16(DIV_ROUND_UP(flowclen,
452 16)) | FW_WR_FLOWID(ep->hwtid));
454 flowc->mnemval[0].mnemonic = FW_FLOWC_MNEM_PFNVFN;
455 flowc->mnemval[0].val = cpu_to_be32(PCI_FUNC(ep->com.dev->rdev.lldi.pdev->devfn) << 8);
456 flowc->mnemval[1].mnemonic = FW_FLOWC_MNEM_CH;
457 flowc->mnemval[1].val = cpu_to_be32(ep->tx_chan);
458 flowc->mnemval[2].mnemonic = FW_FLOWC_MNEM_PORT;
459 flowc->mnemval[2].val = cpu_to_be32(ep->tx_chan);
460 flowc->mnemval[3].mnemonic = FW_FLOWC_MNEM_IQID;
461 flowc->mnemval[3].val = cpu_to_be32(ep->rss_qid);
462 flowc->mnemval[4].mnemonic = FW_FLOWC_MNEM_SNDNXT;
463 flowc->mnemval[4].val = cpu_to_be32(ep->snd_seq);
464 flowc->mnemval[5].mnemonic = FW_FLOWC_MNEM_RCVNXT;
465 flowc->mnemval[5].val = cpu_to_be32(ep->rcv_seq);
466 flowc->mnemval[6].mnemonic = FW_FLOWC_MNEM_SNDBUF;
467 flowc->mnemval[6].val = cpu_to_be32(snd_win);
468 flowc->mnemval[7].mnemonic = FW_FLOWC_MNEM_MSS;
469 flowc->mnemval[7].val = cpu_to_be32(ep->emss);
470 /* Pad WR to 16 byte boundary */
471 flowc->mnemval[8].mnemonic = 0;
472 flowc->mnemval[8].val = 0;
473 for (i = 0; i < 9; i++) {
474 flowc->mnemval[i].r4[0] = 0;
475 flowc->mnemval[i].r4[1] = 0;
476 flowc->mnemval[i].r4[2] = 0;
479 set_wr_txq(skb, CPL_PRIORITY_DATA, ep->txq_idx);
480 c4iw_ofld_send(&ep->com.dev->rdev, skb);
483 static int send_halfclose(struct c4iw_ep *ep, gfp_t gfp)
485 struct cpl_close_con_req *req;
487 int wrlen = roundup(sizeof *req, 16);
489 PDBG("%s ep %p tid %u\n", __func__, ep, ep->hwtid);
490 skb = get_skb(NULL, wrlen, gfp);
492 printk(KERN_ERR MOD "%s - failed to alloc skb\n", __func__);
495 set_wr_txq(skb, CPL_PRIORITY_DATA, ep->txq_idx);
496 t4_set_arp_err_handler(skb, NULL, arp_failure_discard);
497 req = (struct cpl_close_con_req *) skb_put(skb, wrlen);
498 memset(req, 0, wrlen);
499 INIT_TP_WR(req, ep->hwtid);
500 OPCODE_TID(req) = cpu_to_be32(MK_OPCODE_TID(CPL_CLOSE_CON_REQ,
502 return c4iw_l2t_send(&ep->com.dev->rdev, skb, ep->l2t);
505 static int send_abort(struct c4iw_ep *ep, struct sk_buff *skb, gfp_t gfp)
507 struct cpl_abort_req *req;
508 int wrlen = roundup(sizeof *req, 16);
510 PDBG("%s ep %p tid %u\n", __func__, ep, ep->hwtid);
511 skb = get_skb(skb, wrlen, gfp);
513 printk(KERN_ERR MOD "%s - failed to alloc skb.\n",
517 set_wr_txq(skb, CPL_PRIORITY_DATA, ep->txq_idx);
518 t4_set_arp_err_handler(skb, &ep->com.dev->rdev, abort_arp_failure);
519 req = (struct cpl_abort_req *) skb_put(skb, wrlen);
520 memset(req, 0, wrlen);
521 INIT_TP_WR(req, ep->hwtid);
522 OPCODE_TID(req) = cpu_to_be32(MK_OPCODE_TID(CPL_ABORT_REQ, ep->hwtid));
523 req->cmd = CPL_ABORT_SEND_RST;
524 return c4iw_l2t_send(&ep->com.dev->rdev, skb, ep->l2t);
527 #define VLAN_NONE 0xfff
528 #define FILTER_SEL_VLAN_NONE 0xffff
529 #define FILTER_SEL_WIDTH_P_FC (3+1) /* port uses 3 bits, FCoE one bit */
530 #define FILTER_SEL_WIDTH_VIN_P_FC \
531 (6 + 7 + FILTER_SEL_WIDTH_P_FC) /* 6 bits are unused, VF uses 7 bits*/
532 #define FILTER_SEL_WIDTH_TAG_P_FC \
533 (3 + FILTER_SEL_WIDTH_VIN_P_FC) /* PF uses 3 bits */
534 #define FILTER_SEL_WIDTH_VLD_TAG_P_FC (1 + FILTER_SEL_WIDTH_TAG_P_FC)
536 static unsigned int select_ntuple(struct c4iw_dev *dev, struct dst_entry *dst,
537 struct l2t_entry *l2t)
539 unsigned int ntuple = 0;
542 switch (dev->rdev.lldi.filt_mode) {
544 /* default filter mode */
545 case HW_TPL_FR_MT_PR_IV_P_FC:
546 if (l2t->vlan == VLAN_NONE)
547 ntuple |= FILTER_SEL_VLAN_NONE << FILTER_SEL_WIDTH_P_FC;
549 ntuple |= l2t->vlan << FILTER_SEL_WIDTH_P_FC;
550 ntuple |= 1 << FILTER_SEL_WIDTH_TAG_P_FC;
552 ntuple |= l2t->lport << S_PORT | IPPROTO_TCP <<
553 FILTER_SEL_WIDTH_VLD_TAG_P_FC;
555 case HW_TPL_FR_MT_PR_OV_P_FC: {
556 viid = cxgb4_port_viid(l2t->neigh->dev);
558 ntuple |= FW_VIID_VIN_GET(viid) << FILTER_SEL_WIDTH_P_FC;
559 ntuple |= FW_VIID_PFN_GET(viid) << FILTER_SEL_WIDTH_VIN_P_FC;
560 ntuple |= FW_VIID_VIVLD_GET(viid) << FILTER_SEL_WIDTH_TAG_P_FC;
561 ntuple |= l2t->lport << S_PORT | IPPROTO_TCP <<
562 FILTER_SEL_WIDTH_VLD_TAG_P_FC;
571 static int send_connect(struct c4iw_ep *ep)
573 struct cpl_act_open_req *req;
574 struct cpl_t5_act_open_req *t5_req;
575 struct cpl_act_open_req6 *req6;
576 struct cpl_t5_act_open_req6 *t5_req6;
580 unsigned int mtu_idx;
583 int sizev4 = is_t4(ep->com.dev->rdev.lldi.adapter_type) ?
584 sizeof(struct cpl_act_open_req) :
585 sizeof(struct cpl_t5_act_open_req);
586 int sizev6 = is_t4(ep->com.dev->rdev.lldi.adapter_type) ?
587 sizeof(struct cpl_act_open_req6) :
588 sizeof(struct cpl_t5_act_open_req6);
589 struct sockaddr_in *la = (struct sockaddr_in *)&ep->com.local_addr;
590 struct sockaddr_in *ra = (struct sockaddr_in *)&ep->com.remote_addr;
591 struct sockaddr_in6 *la6 = (struct sockaddr_in6 *)&ep->com.local_addr;
592 struct sockaddr_in6 *ra6 = (struct sockaddr_in6 *)&ep->com.remote_addr;
594 wrlen = (ep->com.remote_addr.ss_family == AF_INET) ?
595 roundup(sizev4, 16) :
598 PDBG("%s ep %p atid %u\n", __func__, ep, ep->atid);
600 skb = get_skb(NULL, wrlen, GFP_KERNEL);
602 printk(KERN_ERR MOD "%s - failed to alloc skb.\n",
606 set_wr_txq(skb, CPL_PRIORITY_SETUP, ep->ctrlq_idx);
608 cxgb4_best_mtu(ep->com.dev->rdev.lldi.mtus, ep->mtu, &mtu_idx);
609 wscale = compute_wscale(rcv_win);
610 opt0 = (nocong ? NO_CONG(1) : 0) |
615 L2T_IDX(ep->l2t->idx) |
616 TX_CHAN(ep->tx_chan) |
617 SMAC_SEL(ep->smac_idx) |
619 ULP_MODE(ULP_MODE_TCPDDP) |
620 RCV_BUFSIZ(rcv_win>>10);
621 opt2 = RX_CHANNEL(0) |
622 CCTRL_ECN(enable_ecn) |
623 RSS_QUEUE_VALID | RSS_QUEUE(ep->rss_qid);
624 if (enable_tcp_timestamps)
625 opt2 |= TSTAMPS_EN(1);
628 if (wscale && enable_tcp_window_scaling)
629 opt2 |= WND_SCALE_EN(1);
630 t4_set_arp_err_handler(skb, NULL, act_open_req_arp_failure);
632 if (is_t4(ep->com.dev->rdev.lldi.adapter_type)) {
633 if (ep->com.remote_addr.ss_family == AF_INET) {
634 req = (struct cpl_act_open_req *) skb_put(skb, wrlen);
636 OPCODE_TID(req) = cpu_to_be32(
637 MK_OPCODE_TID(CPL_ACT_OPEN_REQ,
638 ((ep->rss_qid << 14) | ep->atid)));
639 req->local_port = la->sin_port;
640 req->peer_port = ra->sin_port;
641 req->local_ip = la->sin_addr.s_addr;
642 req->peer_ip = ra->sin_addr.s_addr;
643 req->opt0 = cpu_to_be64(opt0);
644 req->params = cpu_to_be32(select_ntuple(ep->com.dev,
646 req->opt2 = cpu_to_be32(opt2);
648 req6 = (struct cpl_act_open_req6 *)skb_put(skb, wrlen);
651 OPCODE_TID(req6) = cpu_to_be32(
652 MK_OPCODE_TID(CPL_ACT_OPEN_REQ6,
653 ((ep->rss_qid<<14)|ep->atid)));
654 req6->local_port = la6->sin6_port;
655 req6->peer_port = ra6->sin6_port;
656 req6->local_ip_hi = *((__be64 *)
657 (la6->sin6_addr.s6_addr));
658 req6->local_ip_lo = *((__be64 *)
659 (la6->sin6_addr.s6_addr + 8));
660 req6->peer_ip_hi = *((__be64 *)
661 (ra6->sin6_addr.s6_addr));
662 req6->peer_ip_lo = *((__be64 *)
663 (ra6->sin6_addr.s6_addr + 8));
664 req6->opt0 = cpu_to_be64(opt0);
665 req6->params = cpu_to_be32(
666 select_ntuple(ep->com.dev, ep->dst,
668 req6->opt2 = cpu_to_be32(opt2);
671 if (ep->com.remote_addr.ss_family == AF_INET) {
672 t5_req = (struct cpl_t5_act_open_req *)
674 INIT_TP_WR(t5_req, 0);
675 OPCODE_TID(t5_req) = cpu_to_be32(
676 MK_OPCODE_TID(CPL_ACT_OPEN_REQ,
677 ((ep->rss_qid << 14) | ep->atid)));
678 t5_req->local_port = la->sin_port;
679 t5_req->peer_port = ra->sin_port;
680 t5_req->local_ip = la->sin_addr.s_addr;
681 t5_req->peer_ip = ra->sin_addr.s_addr;
682 t5_req->opt0 = cpu_to_be64(opt0);
683 t5_req->params = cpu_to_be64(V_FILTER_TUPLE(
684 select_ntuple(ep->com.dev,
686 t5_req->opt2 = cpu_to_be32(opt2);
688 t5_req6 = (struct cpl_t5_act_open_req6 *)
690 INIT_TP_WR(t5_req6, 0);
691 OPCODE_TID(t5_req6) = cpu_to_be32(
692 MK_OPCODE_TID(CPL_ACT_OPEN_REQ6,
693 ((ep->rss_qid<<14)|ep->atid)));
694 t5_req6->local_port = la6->sin6_port;
695 t5_req6->peer_port = ra6->sin6_port;
696 t5_req6->local_ip_hi = *((__be64 *)
697 (la6->sin6_addr.s6_addr));
698 t5_req6->local_ip_lo = *((__be64 *)
699 (la6->sin6_addr.s6_addr + 8));
700 t5_req6->peer_ip_hi = *((__be64 *)
701 (ra6->sin6_addr.s6_addr));
702 t5_req6->peer_ip_lo = *((__be64 *)
703 (ra6->sin6_addr.s6_addr + 8));
704 t5_req6->opt0 = cpu_to_be64(opt0);
705 t5_req6->params = (__force __be64)cpu_to_be32(
706 select_ntuple(ep->com.dev, ep->dst, ep->l2t));
707 t5_req6->opt2 = cpu_to_be32(opt2);
711 set_bit(ACT_OPEN_REQ, &ep->com.history);
712 return c4iw_l2t_send(&ep->com.dev->rdev, skb, ep->l2t);
715 static void send_mpa_req(struct c4iw_ep *ep, struct sk_buff *skb,
719 struct fw_ofld_tx_data_wr *req;
720 struct mpa_message *mpa;
721 struct mpa_v2_conn_params mpa_v2_params;
723 PDBG("%s ep %p tid %u pd_len %d\n", __func__, ep, ep->hwtid, ep->plen);
725 BUG_ON(skb_cloned(skb));
727 mpalen = sizeof(*mpa) + ep->plen;
728 if (mpa_rev_to_use == 2)
729 mpalen += sizeof(struct mpa_v2_conn_params);
730 wrlen = roundup(mpalen + sizeof *req, 16);
731 skb = get_skb(skb, wrlen, GFP_KERNEL);
733 connect_reply_upcall(ep, -ENOMEM);
736 set_wr_txq(skb, CPL_PRIORITY_DATA, ep->txq_idx);
738 req = (struct fw_ofld_tx_data_wr *)skb_put(skb, wrlen);
739 memset(req, 0, wrlen);
740 req->op_to_immdlen = cpu_to_be32(
741 FW_WR_OP(FW_OFLD_TX_DATA_WR) |
743 FW_WR_IMMDLEN(mpalen));
744 req->flowid_len16 = cpu_to_be32(
745 FW_WR_FLOWID(ep->hwtid) |
746 FW_WR_LEN16(wrlen >> 4));
747 req->plen = cpu_to_be32(mpalen);
748 req->tunnel_to_proxy = cpu_to_be32(
749 FW_OFLD_TX_DATA_WR_FLUSH(1) |
750 FW_OFLD_TX_DATA_WR_SHOVE(1));
752 mpa = (struct mpa_message *)(req + 1);
753 memcpy(mpa->key, MPA_KEY_REQ, sizeof(mpa->key));
754 mpa->flags = (crc_enabled ? MPA_CRC : 0) |
755 (markers_enabled ? MPA_MARKERS : 0) |
756 (mpa_rev_to_use == 2 ? MPA_ENHANCED_RDMA_CONN : 0);
757 mpa->private_data_size = htons(ep->plen);
758 mpa->revision = mpa_rev_to_use;
759 if (mpa_rev_to_use == 1) {
760 ep->tried_with_mpa_v1 = 1;
761 ep->retry_with_mpa_v1 = 0;
764 if (mpa_rev_to_use == 2) {
765 mpa->private_data_size = htons(ntohs(mpa->private_data_size) +
766 sizeof (struct mpa_v2_conn_params));
767 mpa_v2_params.ird = htons((u16)ep->ird);
768 mpa_v2_params.ord = htons((u16)ep->ord);
771 mpa_v2_params.ird |= htons(MPA_V2_PEER2PEER_MODEL);
772 if (p2p_type == FW_RI_INIT_P2PTYPE_RDMA_WRITE)
774 htons(MPA_V2_RDMA_WRITE_RTR);
775 else if (p2p_type == FW_RI_INIT_P2PTYPE_READ_REQ)
777 htons(MPA_V2_RDMA_READ_RTR);
779 memcpy(mpa->private_data, &mpa_v2_params,
780 sizeof(struct mpa_v2_conn_params));
783 memcpy(mpa->private_data +
784 sizeof(struct mpa_v2_conn_params),
785 ep->mpa_pkt + sizeof(*mpa), ep->plen);
788 memcpy(mpa->private_data,
789 ep->mpa_pkt + sizeof(*mpa), ep->plen);
792 * Reference the mpa skb. This ensures the data area
793 * will remain in memory until the hw acks the tx.
794 * Function fw4_ack() will deref it.
797 t4_set_arp_err_handler(skb, NULL, arp_failure_discard);
800 c4iw_l2t_send(&ep->com.dev->rdev, skb, ep->l2t);
802 state_set(&ep->com, MPA_REQ_SENT);
803 ep->mpa_attr.initiator = 1;
807 static int send_mpa_reject(struct c4iw_ep *ep, const void *pdata, u8 plen)
810 struct fw_ofld_tx_data_wr *req;
811 struct mpa_message *mpa;
813 struct mpa_v2_conn_params mpa_v2_params;
815 PDBG("%s ep %p tid %u pd_len %d\n", __func__, ep, ep->hwtid, ep->plen);
817 mpalen = sizeof(*mpa) + plen;
818 if (ep->mpa_attr.version == 2 && ep->mpa_attr.enhanced_rdma_conn)
819 mpalen += sizeof(struct mpa_v2_conn_params);
820 wrlen = roundup(mpalen + sizeof *req, 16);
822 skb = get_skb(NULL, wrlen, GFP_KERNEL);
824 printk(KERN_ERR MOD "%s - cannot alloc skb!\n", __func__);
827 set_wr_txq(skb, CPL_PRIORITY_DATA, ep->txq_idx);
829 req = (struct fw_ofld_tx_data_wr *)skb_put(skb, wrlen);
830 memset(req, 0, wrlen);
831 req->op_to_immdlen = cpu_to_be32(
832 FW_WR_OP(FW_OFLD_TX_DATA_WR) |
834 FW_WR_IMMDLEN(mpalen));
835 req->flowid_len16 = cpu_to_be32(
836 FW_WR_FLOWID(ep->hwtid) |
837 FW_WR_LEN16(wrlen >> 4));
838 req->plen = cpu_to_be32(mpalen);
839 req->tunnel_to_proxy = cpu_to_be32(
840 FW_OFLD_TX_DATA_WR_FLUSH(1) |
841 FW_OFLD_TX_DATA_WR_SHOVE(1));
843 mpa = (struct mpa_message *)(req + 1);
844 memset(mpa, 0, sizeof(*mpa));
845 memcpy(mpa->key, MPA_KEY_REP, sizeof(mpa->key));
846 mpa->flags = MPA_REJECT;
847 mpa->revision = ep->mpa_attr.version;
848 mpa->private_data_size = htons(plen);
850 if (ep->mpa_attr.version == 2 && ep->mpa_attr.enhanced_rdma_conn) {
851 mpa->flags |= MPA_ENHANCED_RDMA_CONN;
852 mpa->private_data_size = htons(ntohs(mpa->private_data_size) +
853 sizeof (struct mpa_v2_conn_params));
854 mpa_v2_params.ird = htons(((u16)ep->ird) |
855 (peer2peer ? MPA_V2_PEER2PEER_MODEL :
857 mpa_v2_params.ord = htons(((u16)ep->ord) | (peer2peer ?
859 FW_RI_INIT_P2PTYPE_RDMA_WRITE ?
860 MPA_V2_RDMA_WRITE_RTR : p2p_type ==
861 FW_RI_INIT_P2PTYPE_READ_REQ ?
862 MPA_V2_RDMA_READ_RTR : 0) : 0));
863 memcpy(mpa->private_data, &mpa_v2_params,
864 sizeof(struct mpa_v2_conn_params));
867 memcpy(mpa->private_data +
868 sizeof(struct mpa_v2_conn_params), pdata, plen);
871 memcpy(mpa->private_data, pdata, plen);
874 * Reference the mpa skb again. This ensures the data area
875 * will remain in memory until the hw acks the tx.
876 * Function fw4_ack() will deref it.
879 set_wr_txq(skb, CPL_PRIORITY_DATA, ep->txq_idx);
880 t4_set_arp_err_handler(skb, NULL, arp_failure_discard);
883 return c4iw_l2t_send(&ep->com.dev->rdev, skb, ep->l2t);
886 static int send_mpa_reply(struct c4iw_ep *ep, const void *pdata, u8 plen)
889 struct fw_ofld_tx_data_wr *req;
890 struct mpa_message *mpa;
892 struct mpa_v2_conn_params mpa_v2_params;
894 PDBG("%s ep %p tid %u pd_len %d\n", __func__, ep, ep->hwtid, ep->plen);
896 mpalen = sizeof(*mpa) + plen;
897 if (ep->mpa_attr.version == 2 && ep->mpa_attr.enhanced_rdma_conn)
898 mpalen += sizeof(struct mpa_v2_conn_params);
899 wrlen = roundup(mpalen + sizeof *req, 16);
901 skb = get_skb(NULL, wrlen, GFP_KERNEL);
903 printk(KERN_ERR MOD "%s - cannot alloc skb!\n", __func__);
906 set_wr_txq(skb, CPL_PRIORITY_DATA, ep->txq_idx);
908 req = (struct fw_ofld_tx_data_wr *) skb_put(skb, wrlen);
909 memset(req, 0, wrlen);
910 req->op_to_immdlen = cpu_to_be32(
911 FW_WR_OP(FW_OFLD_TX_DATA_WR) |
913 FW_WR_IMMDLEN(mpalen));
914 req->flowid_len16 = cpu_to_be32(
915 FW_WR_FLOWID(ep->hwtid) |
916 FW_WR_LEN16(wrlen >> 4));
917 req->plen = cpu_to_be32(mpalen);
918 req->tunnel_to_proxy = cpu_to_be32(
919 FW_OFLD_TX_DATA_WR_FLUSH(1) |
920 FW_OFLD_TX_DATA_WR_SHOVE(1));
922 mpa = (struct mpa_message *)(req + 1);
923 memset(mpa, 0, sizeof(*mpa));
924 memcpy(mpa->key, MPA_KEY_REP, sizeof(mpa->key));
925 mpa->flags = (ep->mpa_attr.crc_enabled ? MPA_CRC : 0) |
926 (markers_enabled ? MPA_MARKERS : 0);
927 mpa->revision = ep->mpa_attr.version;
928 mpa->private_data_size = htons(plen);
930 if (ep->mpa_attr.version == 2 && ep->mpa_attr.enhanced_rdma_conn) {
931 mpa->flags |= MPA_ENHANCED_RDMA_CONN;
932 mpa->private_data_size = htons(ntohs(mpa->private_data_size) +
933 sizeof (struct mpa_v2_conn_params));
934 mpa_v2_params.ird = htons((u16)ep->ird);
935 mpa_v2_params.ord = htons((u16)ep->ord);
936 if (peer2peer && (ep->mpa_attr.p2p_type !=
937 FW_RI_INIT_P2PTYPE_DISABLED)) {
938 mpa_v2_params.ird |= htons(MPA_V2_PEER2PEER_MODEL);
940 if (p2p_type == FW_RI_INIT_P2PTYPE_RDMA_WRITE)
942 htons(MPA_V2_RDMA_WRITE_RTR);
943 else if (p2p_type == FW_RI_INIT_P2PTYPE_READ_REQ)
945 htons(MPA_V2_RDMA_READ_RTR);
948 memcpy(mpa->private_data, &mpa_v2_params,
949 sizeof(struct mpa_v2_conn_params));
952 memcpy(mpa->private_data +
953 sizeof(struct mpa_v2_conn_params), pdata, plen);
956 memcpy(mpa->private_data, pdata, plen);
959 * Reference the mpa skb. This ensures the data area
960 * will remain in memory until the hw acks the tx.
961 * Function fw4_ack() will deref it.
964 t4_set_arp_err_handler(skb, NULL, arp_failure_discard);
966 state_set(&ep->com, MPA_REP_SENT);
967 return c4iw_l2t_send(&ep->com.dev->rdev, skb, ep->l2t);
970 static int act_establish(struct c4iw_dev *dev, struct sk_buff *skb)
973 struct cpl_act_establish *req = cplhdr(skb);
974 unsigned int tid = GET_TID(req);
975 unsigned int atid = GET_TID_TID(ntohl(req->tos_atid));
976 struct tid_info *t = dev->rdev.lldi.tids;
978 ep = lookup_atid(t, atid);
980 PDBG("%s ep %p tid %u snd_isn %u rcv_isn %u\n", __func__, ep, tid,
981 be32_to_cpu(req->snd_isn), be32_to_cpu(req->rcv_isn));
983 dst_confirm(ep->dst);
985 /* setup the hwtid for this connection */
987 cxgb4_insert_tid(t, ep, tid);
988 insert_handle(dev, &dev->hwtid_idr, ep, ep->hwtid);
990 ep->snd_seq = be32_to_cpu(req->snd_isn);
991 ep->rcv_seq = be32_to_cpu(req->rcv_isn);
993 set_emss(ep, ntohs(req->tcp_opt));
995 /* dealloc the atid */
996 remove_handle(ep->com.dev, &ep->com.dev->atid_idr, atid);
997 cxgb4_free_atid(t, atid);
998 set_bit(ACT_ESTAB, &ep->com.history);
1000 /* start MPA negotiation */
1001 send_flowc(ep, NULL);
1002 if (ep->retry_with_mpa_v1)
1003 send_mpa_req(ep, skb, 1);
1005 send_mpa_req(ep, skb, mpa_rev);
1010 static void close_complete_upcall(struct c4iw_ep *ep)
1012 struct iw_cm_event event;
1014 PDBG("%s ep %p tid %u\n", __func__, ep, ep->hwtid);
1015 memset(&event, 0, sizeof(event));
1016 event.event = IW_CM_EVENT_CLOSE;
1017 if (ep->com.cm_id) {
1018 PDBG("close complete delivered ep %p cm_id %p tid %u\n",
1019 ep, ep->com.cm_id, ep->hwtid);
1020 ep->com.cm_id->event_handler(ep->com.cm_id, &event);
1021 ep->com.cm_id->rem_ref(ep->com.cm_id);
1022 ep->com.cm_id = NULL;
1023 set_bit(CLOSE_UPCALL, &ep->com.history);
1027 static int abort_connection(struct c4iw_ep *ep, struct sk_buff *skb, gfp_t gfp)
1029 PDBG("%s ep %p tid %u\n", __func__, ep, ep->hwtid);
1030 close_complete_upcall(ep);
1031 state_set(&ep->com, ABORTING);
1032 set_bit(ABORT_CONN, &ep->com.history);
1033 return send_abort(ep, skb, gfp);
1036 static void peer_close_upcall(struct c4iw_ep *ep)
1038 struct iw_cm_event event;
1040 PDBG("%s ep %p tid %u\n", __func__, ep, ep->hwtid);
1041 memset(&event, 0, sizeof(event));
1042 event.event = IW_CM_EVENT_DISCONNECT;
1043 if (ep->com.cm_id) {
1044 PDBG("peer close delivered ep %p cm_id %p tid %u\n",
1045 ep, ep->com.cm_id, ep->hwtid);
1046 ep->com.cm_id->event_handler(ep->com.cm_id, &event);
1047 set_bit(DISCONN_UPCALL, &ep->com.history);
1051 static void peer_abort_upcall(struct c4iw_ep *ep)
1053 struct iw_cm_event event;
1055 PDBG("%s ep %p tid %u\n", __func__, ep, ep->hwtid);
1056 memset(&event, 0, sizeof(event));
1057 event.event = IW_CM_EVENT_CLOSE;
1058 event.status = -ECONNRESET;
1059 if (ep->com.cm_id) {
1060 PDBG("abort delivered ep %p cm_id %p tid %u\n", ep,
1061 ep->com.cm_id, ep->hwtid);
1062 ep->com.cm_id->event_handler(ep->com.cm_id, &event);
1063 ep->com.cm_id->rem_ref(ep->com.cm_id);
1064 ep->com.cm_id = NULL;
1065 set_bit(ABORT_UPCALL, &ep->com.history);
1069 static void connect_reply_upcall(struct c4iw_ep *ep, int status)
1071 struct iw_cm_event event;
1073 PDBG("%s ep %p tid %u status %d\n", __func__, ep, ep->hwtid, status);
1074 memset(&event, 0, sizeof(event));
1075 event.event = IW_CM_EVENT_CONNECT_REPLY;
1076 event.status = status;
1077 memcpy(&event.local_addr, &ep->com.local_addr,
1078 sizeof(ep->com.local_addr));
1079 memcpy(&event.remote_addr, &ep->com.remote_addr,
1080 sizeof(ep->com.remote_addr));
1082 if ((status == 0) || (status == -ECONNREFUSED)) {
1083 if (!ep->tried_with_mpa_v1) {
1084 /* this means MPA_v2 is used */
1085 event.private_data_len = ep->plen -
1086 sizeof(struct mpa_v2_conn_params);
1087 event.private_data = ep->mpa_pkt +
1088 sizeof(struct mpa_message) +
1089 sizeof(struct mpa_v2_conn_params);
1091 /* this means MPA_v1 is used */
1092 event.private_data_len = ep->plen;
1093 event.private_data = ep->mpa_pkt +
1094 sizeof(struct mpa_message);
1098 PDBG("%s ep %p tid %u status %d\n", __func__, ep,
1100 set_bit(CONN_RPL_UPCALL, &ep->com.history);
1101 ep->com.cm_id->event_handler(ep->com.cm_id, &event);
1104 ep->com.cm_id->rem_ref(ep->com.cm_id);
1105 ep->com.cm_id = NULL;
1109 static void connect_request_upcall(struct c4iw_ep *ep)
1111 struct iw_cm_event event;
1113 PDBG("%s ep %p tid %u\n", __func__, ep, ep->hwtid);
1114 memset(&event, 0, sizeof(event));
1115 event.event = IW_CM_EVENT_CONNECT_REQUEST;
1116 memcpy(&event.local_addr, &ep->com.local_addr,
1117 sizeof(ep->com.local_addr));
1118 memcpy(&event.remote_addr, &ep->com.remote_addr,
1119 sizeof(ep->com.remote_addr));
1120 event.provider_data = ep;
1121 if (!ep->tried_with_mpa_v1) {
1122 /* this means MPA_v2 is used */
1123 event.ord = ep->ord;
1124 event.ird = ep->ird;
1125 event.private_data_len = ep->plen -
1126 sizeof(struct mpa_v2_conn_params);
1127 event.private_data = ep->mpa_pkt + sizeof(struct mpa_message) +
1128 sizeof(struct mpa_v2_conn_params);
1130 /* this means MPA_v1 is used. Send max supported */
1131 event.ord = c4iw_max_read_depth;
1132 event.ird = c4iw_max_read_depth;
1133 event.private_data_len = ep->plen;
1134 event.private_data = ep->mpa_pkt + sizeof(struct mpa_message);
1136 if (state_read(&ep->parent_ep->com) != DEAD) {
1137 c4iw_get_ep(&ep->com);
1138 ep->parent_ep->com.cm_id->event_handler(
1139 ep->parent_ep->com.cm_id,
1142 set_bit(CONNREQ_UPCALL, &ep->com.history);
1143 c4iw_put_ep(&ep->parent_ep->com);
1144 ep->parent_ep = NULL;
1147 static void established_upcall(struct c4iw_ep *ep)
1149 struct iw_cm_event event;
1151 PDBG("%s ep %p tid %u\n", __func__, ep, ep->hwtid);
1152 memset(&event, 0, sizeof(event));
1153 event.event = IW_CM_EVENT_ESTABLISHED;
1154 event.ird = ep->ird;
1155 event.ord = ep->ord;
1156 if (ep->com.cm_id) {
1157 PDBG("%s ep %p tid %u\n", __func__, ep, ep->hwtid);
1158 ep->com.cm_id->event_handler(ep->com.cm_id, &event);
1159 set_bit(ESTAB_UPCALL, &ep->com.history);
1163 static int update_rx_credits(struct c4iw_ep *ep, u32 credits)
1165 struct cpl_rx_data_ack *req;
1166 struct sk_buff *skb;
1167 int wrlen = roundup(sizeof *req, 16);
1169 PDBG("%s ep %p tid %u credits %u\n", __func__, ep, ep->hwtid, credits);
1170 skb = get_skb(NULL, wrlen, GFP_KERNEL);
1172 printk(KERN_ERR MOD "update_rx_credits - cannot alloc skb!\n");
1176 req = (struct cpl_rx_data_ack *) skb_put(skb, wrlen);
1177 memset(req, 0, wrlen);
1178 INIT_TP_WR(req, ep->hwtid);
1179 OPCODE_TID(req) = cpu_to_be32(MK_OPCODE_TID(CPL_RX_DATA_ACK,
1181 req->credit_dack = cpu_to_be32(credits | RX_FORCE_ACK(1) |
1183 V_RX_DACK_MODE(dack_mode));
1184 set_wr_txq(skb, CPL_PRIORITY_ACK, ep->ctrlq_idx);
1185 c4iw_ofld_send(&ep->com.dev->rdev, skb);
1189 static void process_mpa_reply(struct c4iw_ep *ep, struct sk_buff *skb)
1191 struct mpa_message *mpa;
1192 struct mpa_v2_conn_params *mpa_v2_params;
1194 u16 resp_ird, resp_ord;
1195 u8 rtr_mismatch = 0, insuff_ird = 0;
1196 struct c4iw_qp_attributes attrs;
1197 enum c4iw_qp_attr_mask mask;
1200 PDBG("%s ep %p tid %u\n", __func__, ep, ep->hwtid);
1203 * Stop mpa timer. If it expired, then the state has
1204 * changed and we bail since ep_timeout already aborted
1208 if (state_read(&ep->com) != MPA_REQ_SENT)
1212 * If we get more than the supported amount of private data
1213 * then we must fail this connection.
1215 if (ep->mpa_pkt_len + skb->len > sizeof(ep->mpa_pkt)) {
1221 * copy the new data into our accumulation buffer.
1223 skb_copy_from_linear_data(skb, &(ep->mpa_pkt[ep->mpa_pkt_len]),
1225 ep->mpa_pkt_len += skb->len;
1228 * if we don't even have the mpa message, then bail.
1230 if (ep->mpa_pkt_len < sizeof(*mpa))
1232 mpa = (struct mpa_message *) ep->mpa_pkt;
1234 /* Validate MPA header. */
1235 if (mpa->revision > mpa_rev) {
1236 printk(KERN_ERR MOD "%s MPA version mismatch. Local = %d,"
1237 " Received = %d\n", __func__, mpa_rev, mpa->revision);
1241 if (memcmp(mpa->key, MPA_KEY_REP, sizeof(mpa->key))) {
1246 plen = ntohs(mpa->private_data_size);
1249 * Fail if there's too much private data.
1251 if (plen > MPA_MAX_PRIVATE_DATA) {
1257 * If plen does not account for pkt size
1259 if (ep->mpa_pkt_len > (sizeof(*mpa) + plen)) {
1264 ep->plen = (u8) plen;
1267 * If we don't have all the pdata yet, then bail.
1268 * We'll continue process when more data arrives.
1270 if (ep->mpa_pkt_len < (sizeof(*mpa) + plen))
1273 if (mpa->flags & MPA_REJECT) {
1274 err = -ECONNREFUSED;
1279 * If we get here we have accumulated the entire mpa
1280 * start reply message including private data. And
1281 * the MPA header is valid.
1283 state_set(&ep->com, FPDU_MODE);
1284 ep->mpa_attr.crc_enabled = (mpa->flags & MPA_CRC) | crc_enabled ? 1 : 0;
1285 ep->mpa_attr.recv_marker_enabled = markers_enabled;
1286 ep->mpa_attr.xmit_marker_enabled = mpa->flags & MPA_MARKERS ? 1 : 0;
1287 ep->mpa_attr.version = mpa->revision;
1288 ep->mpa_attr.p2p_type = FW_RI_INIT_P2PTYPE_DISABLED;
1290 if (mpa->revision == 2) {
1291 ep->mpa_attr.enhanced_rdma_conn =
1292 mpa->flags & MPA_ENHANCED_RDMA_CONN ? 1 : 0;
1293 if (ep->mpa_attr.enhanced_rdma_conn) {
1294 mpa_v2_params = (struct mpa_v2_conn_params *)
1295 (ep->mpa_pkt + sizeof(*mpa));
1296 resp_ird = ntohs(mpa_v2_params->ird) &
1297 MPA_V2_IRD_ORD_MASK;
1298 resp_ord = ntohs(mpa_v2_params->ord) &
1299 MPA_V2_IRD_ORD_MASK;
1302 * This is a double-check. Ideally, below checks are
1303 * not required since ird/ord stuff has been taken
1304 * care of in c4iw_accept_cr
1306 if ((ep->ird < resp_ord) || (ep->ord > resp_ird)) {
1313 if (ntohs(mpa_v2_params->ird) &
1314 MPA_V2_PEER2PEER_MODEL) {
1315 if (ntohs(mpa_v2_params->ord) &
1316 MPA_V2_RDMA_WRITE_RTR)
1317 ep->mpa_attr.p2p_type =
1318 FW_RI_INIT_P2PTYPE_RDMA_WRITE;
1319 else if (ntohs(mpa_v2_params->ord) &
1320 MPA_V2_RDMA_READ_RTR)
1321 ep->mpa_attr.p2p_type =
1322 FW_RI_INIT_P2PTYPE_READ_REQ;
1325 } else if (mpa->revision == 1)
1327 ep->mpa_attr.p2p_type = p2p_type;
1329 PDBG("%s - crc_enabled=%d, recv_marker_enabled=%d, "
1330 "xmit_marker_enabled=%d, version=%d p2p_type=%d local-p2p_type = "
1331 "%d\n", __func__, ep->mpa_attr.crc_enabled,
1332 ep->mpa_attr.recv_marker_enabled,
1333 ep->mpa_attr.xmit_marker_enabled, ep->mpa_attr.version,
1334 ep->mpa_attr.p2p_type, p2p_type);
1337 * If responder's RTR does not match with that of initiator, assign
1338 * FW_RI_INIT_P2PTYPE_DISABLED in mpa attributes so that RTR is not
1339 * generated when moving QP to RTS state.
1340 * A TERM message will be sent after QP has moved to RTS state
1342 if ((ep->mpa_attr.version == 2) && peer2peer &&
1343 (ep->mpa_attr.p2p_type != p2p_type)) {
1344 ep->mpa_attr.p2p_type = FW_RI_INIT_P2PTYPE_DISABLED;
1348 attrs.mpa_attr = ep->mpa_attr;
1349 attrs.max_ird = ep->ird;
1350 attrs.max_ord = ep->ord;
1351 attrs.llp_stream_handle = ep;
1352 attrs.next_state = C4IW_QP_STATE_RTS;
1354 mask = C4IW_QP_ATTR_NEXT_STATE |
1355 C4IW_QP_ATTR_LLP_STREAM_HANDLE | C4IW_QP_ATTR_MPA_ATTR |
1356 C4IW_QP_ATTR_MAX_IRD | C4IW_QP_ATTR_MAX_ORD;
1358 /* bind QP and TID with INIT_WR */
1359 err = c4iw_modify_qp(ep->com.qp->rhp,
1360 ep->com.qp, mask, &attrs, 1);
1365 * If responder's RTR requirement did not match with what initiator
1366 * supports, generate TERM message
1369 printk(KERN_ERR "%s: RTR mismatch, sending TERM\n", __func__);
1370 attrs.layer_etype = LAYER_MPA | DDP_LLP;
1371 attrs.ecode = MPA_NOMATCH_RTR;
1372 attrs.next_state = C4IW_QP_STATE_TERMINATE;
1373 err = c4iw_modify_qp(ep->com.qp->rhp, ep->com.qp,
1374 C4IW_QP_ATTR_NEXT_STATE, &attrs, 0);
1380 * Generate TERM if initiator IRD is not sufficient for responder
1381 * provided ORD. Currently, we do the same behaviour even when
1382 * responder provided IRD is also not sufficient as regards to
1386 printk(KERN_ERR "%s: Insufficient IRD, sending TERM\n",
1388 attrs.layer_etype = LAYER_MPA | DDP_LLP;
1389 attrs.ecode = MPA_INSUFF_IRD;
1390 attrs.next_state = C4IW_QP_STATE_TERMINATE;
1391 err = c4iw_modify_qp(ep->com.qp->rhp, ep->com.qp,
1392 C4IW_QP_ATTR_NEXT_STATE, &attrs, 0);
1398 state_set(&ep->com, ABORTING);
1399 send_abort(ep, skb, GFP_KERNEL);
1401 connect_reply_upcall(ep, err);
1405 static void process_mpa_request(struct c4iw_ep *ep, struct sk_buff *skb)
1407 struct mpa_message *mpa;
1408 struct mpa_v2_conn_params *mpa_v2_params;
1411 PDBG("%s ep %p tid %u\n", __func__, ep, ep->hwtid);
1413 if (state_read(&ep->com) != MPA_REQ_WAIT)
1417 * If we get more than the supported amount of private data
1418 * then we must fail this connection.
1420 if (ep->mpa_pkt_len + skb->len > sizeof(ep->mpa_pkt)) {
1422 abort_connection(ep, skb, GFP_KERNEL);
1426 PDBG("%s enter (%s line %u)\n", __func__, __FILE__, __LINE__);
1429 * Copy the new data into our accumulation buffer.
1431 skb_copy_from_linear_data(skb, &(ep->mpa_pkt[ep->mpa_pkt_len]),
1433 ep->mpa_pkt_len += skb->len;
1436 * If we don't even have the mpa message, then bail.
1437 * We'll continue process when more data arrives.
1439 if (ep->mpa_pkt_len < sizeof(*mpa))
1442 PDBG("%s enter (%s line %u)\n", __func__, __FILE__, __LINE__);
1444 mpa = (struct mpa_message *) ep->mpa_pkt;
1447 * Validate MPA Header.
1449 if (mpa->revision > mpa_rev) {
1450 printk(KERN_ERR MOD "%s MPA version mismatch. Local = %d,"
1451 " Received = %d\n", __func__, mpa_rev, mpa->revision);
1453 abort_connection(ep, skb, GFP_KERNEL);
1457 if (memcmp(mpa->key, MPA_KEY_REQ, sizeof(mpa->key))) {
1459 abort_connection(ep, skb, GFP_KERNEL);
1463 plen = ntohs(mpa->private_data_size);
1466 * Fail if there's too much private data.
1468 if (plen > MPA_MAX_PRIVATE_DATA) {
1470 abort_connection(ep, skb, GFP_KERNEL);
1475 * If plen does not account for pkt size
1477 if (ep->mpa_pkt_len > (sizeof(*mpa) + plen)) {
1479 abort_connection(ep, skb, GFP_KERNEL);
1482 ep->plen = (u8) plen;
1485 * If we don't have all the pdata yet, then bail.
1487 if (ep->mpa_pkt_len < (sizeof(*mpa) + plen))
1491 * If we get here we have accumulated the entire mpa
1492 * start reply message including private data.
1494 ep->mpa_attr.initiator = 0;
1495 ep->mpa_attr.crc_enabled = (mpa->flags & MPA_CRC) | crc_enabled ? 1 : 0;
1496 ep->mpa_attr.recv_marker_enabled = markers_enabled;
1497 ep->mpa_attr.xmit_marker_enabled = mpa->flags & MPA_MARKERS ? 1 : 0;
1498 ep->mpa_attr.version = mpa->revision;
1499 if (mpa->revision == 1)
1500 ep->tried_with_mpa_v1 = 1;
1501 ep->mpa_attr.p2p_type = FW_RI_INIT_P2PTYPE_DISABLED;
1503 if (mpa->revision == 2) {
1504 ep->mpa_attr.enhanced_rdma_conn =
1505 mpa->flags & MPA_ENHANCED_RDMA_CONN ? 1 : 0;
1506 if (ep->mpa_attr.enhanced_rdma_conn) {
1507 mpa_v2_params = (struct mpa_v2_conn_params *)
1508 (ep->mpa_pkt + sizeof(*mpa));
1509 ep->ird = ntohs(mpa_v2_params->ird) &
1510 MPA_V2_IRD_ORD_MASK;
1511 ep->ord = ntohs(mpa_v2_params->ord) &
1512 MPA_V2_IRD_ORD_MASK;
1513 if (ntohs(mpa_v2_params->ird) & MPA_V2_PEER2PEER_MODEL)
1515 if (ntohs(mpa_v2_params->ord) &
1516 MPA_V2_RDMA_WRITE_RTR)
1517 ep->mpa_attr.p2p_type =
1518 FW_RI_INIT_P2PTYPE_RDMA_WRITE;
1519 else if (ntohs(mpa_v2_params->ord) &
1520 MPA_V2_RDMA_READ_RTR)
1521 ep->mpa_attr.p2p_type =
1522 FW_RI_INIT_P2PTYPE_READ_REQ;
1525 } else if (mpa->revision == 1)
1527 ep->mpa_attr.p2p_type = p2p_type;
1529 PDBG("%s - crc_enabled=%d, recv_marker_enabled=%d, "
1530 "xmit_marker_enabled=%d, version=%d p2p_type=%d\n", __func__,
1531 ep->mpa_attr.crc_enabled, ep->mpa_attr.recv_marker_enabled,
1532 ep->mpa_attr.xmit_marker_enabled, ep->mpa_attr.version,
1533 ep->mpa_attr.p2p_type);
1535 state_set(&ep->com, MPA_REQ_RCVD);
1538 connect_request_upcall(ep);
1542 static int rx_data(struct c4iw_dev *dev, struct sk_buff *skb)
1545 struct cpl_rx_data *hdr = cplhdr(skb);
1546 unsigned int dlen = ntohs(hdr->len);
1547 unsigned int tid = GET_TID(hdr);
1548 struct tid_info *t = dev->rdev.lldi.tids;
1549 __u8 status = hdr->status;
1551 ep = lookup_tid(t, tid);
1552 PDBG("%s ep %p tid %u dlen %u\n", __func__, ep, ep->hwtid, dlen);
1553 skb_pull(skb, sizeof(*hdr));
1554 skb_trim(skb, dlen);
1556 /* update RX credits */
1557 update_rx_credits(ep, dlen);
1559 switch (state_read(&ep->com)) {
1561 ep->rcv_seq += dlen;
1562 process_mpa_reply(ep, skb);
1565 ep->rcv_seq += dlen;
1566 process_mpa_request(ep, skb);
1569 struct c4iw_qp_attributes attrs;
1570 BUG_ON(!ep->com.qp);
1572 pr_err("%s Unexpected streaming data." \
1573 " qpid %u ep %p state %d tid %u status %d\n",
1574 __func__, ep->com.qp->wq.sq.qid, ep,
1575 state_read(&ep->com), ep->hwtid, status);
1576 attrs.next_state = C4IW_QP_STATE_TERMINATE;
1577 c4iw_modify_qp(ep->com.qp->rhp, ep->com.qp,
1578 C4IW_QP_ATTR_NEXT_STATE, &attrs, 0);
1587 static int abort_rpl(struct c4iw_dev *dev, struct sk_buff *skb)
1590 struct cpl_abort_rpl_rss *rpl = cplhdr(skb);
1592 unsigned int tid = GET_TID(rpl);
1593 struct tid_info *t = dev->rdev.lldi.tids;
1595 ep = lookup_tid(t, tid);
1597 printk(KERN_WARNING MOD "Abort rpl to freed endpoint\n");
1600 PDBG("%s ep %p tid %u\n", __func__, ep, ep->hwtid);
1601 mutex_lock(&ep->com.mutex);
1602 switch (ep->com.state) {
1604 c4iw_wake_up(&ep->com.wr_wait, -ECONNRESET);
1605 __state_set(&ep->com, DEAD);
1609 printk(KERN_ERR "%s ep %p state %d\n",
1610 __func__, ep, ep->com.state);
1613 mutex_unlock(&ep->com.mutex);
1616 release_ep_resources(ep);
1620 static void send_fw_act_open_req(struct c4iw_ep *ep, unsigned int atid)
1622 struct sk_buff *skb;
1623 struct fw_ofld_connection_wr *req;
1624 unsigned int mtu_idx;
1626 struct sockaddr_in *sin;
1628 skb = get_skb(NULL, sizeof(*req), GFP_KERNEL);
1629 req = (struct fw_ofld_connection_wr *)__skb_put(skb, sizeof(*req));
1630 memset(req, 0, sizeof(*req));
1631 req->op_compl = htonl(V_WR_OP(FW_OFLD_CONNECTION_WR));
1632 req->len16_pkd = htonl(FW_WR_LEN16(DIV_ROUND_UP(sizeof(*req), 16)));
1633 req->le.filter = cpu_to_be32(select_ntuple(ep->com.dev, ep->dst,
1635 sin = (struct sockaddr_in *)&ep->com.local_addr;
1636 req->le.lport = sin->sin_port;
1637 req->le.u.ipv4.lip = sin->sin_addr.s_addr;
1638 sin = (struct sockaddr_in *)&ep->com.remote_addr;
1639 req->le.pport = sin->sin_port;
1640 req->le.u.ipv4.pip = sin->sin_addr.s_addr;
1641 req->tcb.t_state_to_astid =
1642 htonl(V_FW_OFLD_CONNECTION_WR_T_STATE(TCP_SYN_SENT) |
1643 V_FW_OFLD_CONNECTION_WR_ASTID(atid));
1644 req->tcb.cplrxdataack_cplpassacceptrpl =
1645 htons(F_FW_OFLD_CONNECTION_WR_CPLRXDATAACK);
1646 req->tcb.tx_max = (__force __be32) jiffies;
1647 req->tcb.rcv_adv = htons(1);
1648 cxgb4_best_mtu(ep->com.dev->rdev.lldi.mtus, ep->mtu, &mtu_idx);
1649 wscale = compute_wscale(rcv_win);
1650 req->tcb.opt0 = (__force __be64) (TCAM_BYPASS(1) |
1651 (nocong ? NO_CONG(1) : 0) |
1656 L2T_IDX(ep->l2t->idx) |
1657 TX_CHAN(ep->tx_chan) |
1658 SMAC_SEL(ep->smac_idx) |
1660 ULP_MODE(ULP_MODE_TCPDDP) |
1661 RCV_BUFSIZ(rcv_win >> 10));
1662 req->tcb.opt2 = (__force __be32) (PACE(1) |
1663 TX_QUEUE(ep->com.dev->rdev.lldi.tx_modq[ep->tx_chan]) |
1665 CCTRL_ECN(enable_ecn) |
1666 RSS_QUEUE_VALID | RSS_QUEUE(ep->rss_qid));
1667 if (enable_tcp_timestamps)
1668 req->tcb.opt2 |= (__force __be32) TSTAMPS_EN(1);
1669 if (enable_tcp_sack)
1670 req->tcb.opt2 |= (__force __be32) SACK_EN(1);
1671 if (wscale && enable_tcp_window_scaling)
1672 req->tcb.opt2 |= (__force __be32) WND_SCALE_EN(1);
1673 req->tcb.opt0 = cpu_to_be64((__force u64) req->tcb.opt0);
1674 req->tcb.opt2 = cpu_to_be32((__force u32) req->tcb.opt2);
1675 set_wr_txq(skb, CPL_PRIORITY_CONTROL, ep->ctrlq_idx);
1676 set_bit(ACT_OFLD_CONN, &ep->com.history);
1677 c4iw_l2t_send(&ep->com.dev->rdev, skb, ep->l2t);
1681 * Return whether a failed active open has allocated a TID
1683 static inline int act_open_has_tid(int status)
1685 return status != CPL_ERR_TCAM_FULL && status != CPL_ERR_CONN_EXIST &&
1686 status != CPL_ERR_ARP_MISS;
1689 #define ACT_OPEN_RETRY_COUNT 2
1691 static int import_ep(struct c4iw_ep *ep, int iptype, __u8 *peer_ip,
1692 struct dst_entry *dst, struct c4iw_dev *cdev,
1695 struct neighbour *n;
1697 struct net_device *pdev;
1699 n = dst_neigh_lookup(dst, peer_ip);
1705 if (n->dev->flags & IFF_LOOPBACK) {
1707 pdev = ip_dev_find(&init_net, *(__be32 *)peer_ip);
1708 else if (IS_ENABLED(CONFIG_IPV6))
1709 for_each_netdev(&init_net, pdev) {
1710 if (ipv6_chk_addr(&init_net,
1711 (struct in6_addr *)peer_ip,
1722 ep->l2t = cxgb4_l2t_get(cdev->rdev.lldi.l2t,
1726 ep->mtu = pdev->mtu;
1727 ep->tx_chan = cxgb4_port_chan(pdev);
1728 ep->smac_idx = (cxgb4_port_viid(pdev) & 0x7F) << 1;
1729 step = cdev->rdev.lldi.ntxq /
1730 cdev->rdev.lldi.nchan;
1731 ep->txq_idx = cxgb4_port_idx(pdev) * step;
1732 step = cdev->rdev.lldi.nrxq /
1733 cdev->rdev.lldi.nchan;
1734 ep->ctrlq_idx = cxgb4_port_idx(pdev);
1735 ep->rss_qid = cdev->rdev.lldi.rxq_ids[
1736 cxgb4_port_idx(pdev) * step];
1739 pdev = get_real_dev(n->dev);
1740 ep->l2t = cxgb4_l2t_get(cdev->rdev.lldi.l2t,
1744 ep->mtu = dst_mtu(dst);
1745 ep->tx_chan = cxgb4_port_chan(n->dev);
1746 ep->smac_idx = (cxgb4_port_viid(n->dev) & 0x7F) << 1;
1747 step = cdev->rdev.lldi.ntxq /
1748 cdev->rdev.lldi.nchan;
1749 ep->txq_idx = cxgb4_port_idx(n->dev) * step;
1750 ep->ctrlq_idx = cxgb4_port_idx(n->dev);
1751 step = cdev->rdev.lldi.nrxq /
1752 cdev->rdev.lldi.nchan;
1753 ep->rss_qid = cdev->rdev.lldi.rxq_ids[
1754 cxgb4_port_idx(n->dev) * step];
1757 ep->retry_with_mpa_v1 = 0;
1758 ep->tried_with_mpa_v1 = 0;
1770 static int c4iw_reconnect(struct c4iw_ep *ep)
1773 struct sockaddr_in *laddr = (struct sockaddr_in *)
1774 &ep->com.cm_id->local_addr;
1775 struct sockaddr_in *raddr = (struct sockaddr_in *)
1776 &ep->com.cm_id->remote_addr;
1777 struct sockaddr_in6 *laddr6 = (struct sockaddr_in6 *)
1778 &ep->com.cm_id->local_addr;
1779 struct sockaddr_in6 *raddr6 = (struct sockaddr_in6 *)
1780 &ep->com.cm_id->remote_addr;
1784 PDBG("%s qp %p cm_id %p\n", __func__, ep->com.qp, ep->com.cm_id);
1785 init_timer(&ep->timer);
1788 * Allocate an active TID to initiate a TCP connection.
1790 ep->atid = cxgb4_alloc_atid(ep->com.dev->rdev.lldi.tids, ep);
1791 if (ep->atid == -1) {
1792 pr_err("%s - cannot alloc atid.\n", __func__);
1796 insert_handle(ep->com.dev, &ep->com.dev->atid_idr, ep, ep->atid);
1799 if (ep->com.cm_id->local_addr.ss_family == AF_INET) {
1800 ep->dst = find_route(ep->com.dev, laddr->sin_addr.s_addr,
1801 raddr->sin_addr.s_addr, laddr->sin_port,
1802 raddr->sin_port, 0);
1804 ra = (__u8 *)&raddr->sin_addr;
1806 ep->dst = find_route6(ep->com.dev, laddr6->sin6_addr.s6_addr,
1807 raddr6->sin6_addr.s6_addr,
1808 laddr6->sin6_port, raddr6->sin6_port, 0,
1809 raddr6->sin6_scope_id);
1811 ra = (__u8 *)&raddr6->sin6_addr;
1814 pr_err("%s - cannot find route.\n", __func__);
1815 err = -EHOSTUNREACH;
1818 err = import_ep(ep, iptype, ra, ep->dst, ep->com.dev, false);
1820 pr_err("%s - cannot alloc l2e.\n", __func__);
1824 PDBG("%s txq_idx %u tx_chan %u smac_idx %u rss_qid %u l2t_idx %u\n",
1825 __func__, ep->txq_idx, ep->tx_chan, ep->smac_idx, ep->rss_qid,
1828 state_set(&ep->com, CONNECTING);
1831 /* send connect request to rnic */
1832 err = send_connect(ep);
1836 cxgb4_l2t_release(ep->l2t);
1838 dst_release(ep->dst);
1840 remove_handle(ep->com.dev, &ep->com.dev->atid_idr, ep->atid);
1841 cxgb4_free_atid(ep->com.dev->rdev.lldi.tids, ep->atid);
1844 * remember to send notification to upper layer.
1845 * We are in here so the upper layer is not aware that this is
1846 * re-connect attempt and so, upper layer is still waiting for
1847 * response of 1st connect request.
1849 connect_reply_upcall(ep, -ECONNRESET);
1850 c4iw_put_ep(&ep->com);
1855 static int act_open_rpl(struct c4iw_dev *dev, struct sk_buff *skb)
1858 struct cpl_act_open_rpl *rpl = cplhdr(skb);
1859 unsigned int atid = GET_TID_TID(GET_AOPEN_ATID(
1860 ntohl(rpl->atid_status)));
1861 struct tid_info *t = dev->rdev.lldi.tids;
1862 int status = GET_AOPEN_STATUS(ntohl(rpl->atid_status));
1863 struct sockaddr_in *la;
1864 struct sockaddr_in *ra;
1865 struct sockaddr_in6 *la6;
1866 struct sockaddr_in6 *ra6;
1868 ep = lookup_atid(t, atid);
1869 la = (struct sockaddr_in *)&ep->com.local_addr;
1870 ra = (struct sockaddr_in *)&ep->com.remote_addr;
1871 la6 = (struct sockaddr_in6 *)&ep->com.local_addr;
1872 ra6 = (struct sockaddr_in6 *)&ep->com.remote_addr;
1874 PDBG("%s ep %p atid %u status %u errno %d\n", __func__, ep, atid,
1875 status, status2errno(status));
1877 if (status == CPL_ERR_RTX_NEG_ADVICE) {
1878 printk(KERN_WARNING MOD "Connection problems for atid %u\n",
1883 set_bit(ACT_OPEN_RPL, &ep->com.history);
1886 * Log interesting failures.
1889 case CPL_ERR_CONN_RESET:
1890 case CPL_ERR_CONN_TIMEDOUT:
1892 case CPL_ERR_TCAM_FULL:
1893 mutex_lock(&dev->rdev.stats.lock);
1894 dev->rdev.stats.tcam_full++;
1895 mutex_unlock(&dev->rdev.stats.lock);
1896 if (ep->com.local_addr.ss_family == AF_INET &&
1897 dev->rdev.lldi.enable_fw_ofld_conn) {
1898 send_fw_act_open_req(ep,
1899 GET_TID_TID(GET_AOPEN_ATID(
1900 ntohl(rpl->atid_status))));
1904 case CPL_ERR_CONN_EXIST:
1905 if (ep->retry_count++ < ACT_OPEN_RETRY_COUNT) {
1906 set_bit(ACT_RETRY_INUSE, &ep->com.history);
1907 remove_handle(ep->com.dev, &ep->com.dev->atid_idr,
1909 cxgb4_free_atid(t, atid);
1910 dst_release(ep->dst);
1911 cxgb4_l2t_release(ep->l2t);
1917 if (ep->com.local_addr.ss_family == AF_INET) {
1918 pr_info("Active open failure - atid %u status %u errno %d %pI4:%u->%pI4:%u\n",
1919 atid, status, status2errno(status),
1920 &la->sin_addr.s_addr, ntohs(la->sin_port),
1921 &ra->sin_addr.s_addr, ntohs(ra->sin_port));
1923 pr_info("Active open failure - atid %u status %u errno %d %pI6:%u->%pI6:%u\n",
1924 atid, status, status2errno(status),
1925 la6->sin6_addr.s6_addr, ntohs(la6->sin6_port),
1926 ra6->sin6_addr.s6_addr, ntohs(ra6->sin6_port));
1931 connect_reply_upcall(ep, status2errno(status));
1932 state_set(&ep->com, DEAD);
1934 if (status && act_open_has_tid(status))
1935 cxgb4_remove_tid(ep->com.dev->rdev.lldi.tids, 0, GET_TID(rpl));
1937 remove_handle(ep->com.dev, &ep->com.dev->atid_idr, atid);
1938 cxgb4_free_atid(t, atid);
1939 dst_release(ep->dst);
1940 cxgb4_l2t_release(ep->l2t);
1941 c4iw_put_ep(&ep->com);
1946 static int pass_open_rpl(struct c4iw_dev *dev, struct sk_buff *skb)
1948 struct cpl_pass_open_rpl *rpl = cplhdr(skb);
1949 struct tid_info *t = dev->rdev.lldi.tids;
1950 unsigned int stid = GET_TID(rpl);
1951 struct c4iw_listen_ep *ep = lookup_stid(t, stid);
1954 PDBG("%s stid %d lookup failure!\n", __func__, stid);
1957 PDBG("%s ep %p status %d error %d\n", __func__, ep,
1958 rpl->status, status2errno(rpl->status));
1959 c4iw_wake_up(&ep->com.wr_wait, status2errno(rpl->status));
1965 static int close_listsrv_rpl(struct c4iw_dev *dev, struct sk_buff *skb)
1967 struct cpl_close_listsvr_rpl *rpl = cplhdr(skb);
1968 struct tid_info *t = dev->rdev.lldi.tids;
1969 unsigned int stid = GET_TID(rpl);
1970 struct c4iw_listen_ep *ep = lookup_stid(t, stid);
1972 PDBG("%s ep %p\n", __func__, ep);
1973 c4iw_wake_up(&ep->com.wr_wait, status2errno(rpl->status));
1977 static void accept_cr(struct c4iw_ep *ep, struct sk_buff *skb,
1978 struct cpl_pass_accept_req *req)
1980 struct cpl_pass_accept_rpl *rpl;
1981 unsigned int mtu_idx;
1986 PDBG("%s ep %p tid %u\n", __func__, ep, ep->hwtid);
1987 BUG_ON(skb_cloned(skb));
1988 skb_trim(skb, sizeof(*rpl));
1990 cxgb4_best_mtu(ep->com.dev->rdev.lldi.mtus, ep->mtu, &mtu_idx);
1991 wscale = compute_wscale(rcv_win);
1992 opt0 = (nocong ? NO_CONG(1) : 0) |
1997 L2T_IDX(ep->l2t->idx) |
1998 TX_CHAN(ep->tx_chan) |
1999 SMAC_SEL(ep->smac_idx) |
2000 DSCP(ep->tos >> 2) |
2001 ULP_MODE(ULP_MODE_TCPDDP) |
2002 RCV_BUFSIZ(rcv_win>>10);
2003 opt2 = RX_CHANNEL(0) |
2004 RSS_QUEUE_VALID | RSS_QUEUE(ep->rss_qid);
2006 if (enable_tcp_timestamps && req->tcpopt.tstamp)
2007 opt2 |= TSTAMPS_EN(1);
2008 if (enable_tcp_sack && req->tcpopt.sack)
2010 if (wscale && enable_tcp_window_scaling)
2011 opt2 |= WND_SCALE_EN(1);
2013 const struct tcphdr *tcph;
2014 u32 hlen = ntohl(req->hdr_len);
2016 tcph = (const void *)(req + 1) + G_ETH_HDR_LEN(hlen) +
2018 if (tcph->ece && tcph->cwr)
2019 opt2 |= CCTRL_ECN(1);
2023 INIT_TP_WR(rpl, ep->hwtid);
2024 OPCODE_TID(rpl) = cpu_to_be32(MK_OPCODE_TID(CPL_PASS_ACCEPT_RPL,
2026 rpl->opt0 = cpu_to_be64(opt0);
2027 rpl->opt2 = cpu_to_be32(opt2);
2028 set_wr_txq(skb, CPL_PRIORITY_SETUP, ep->ctrlq_idx);
2029 t4_set_arp_err_handler(skb, NULL, arp_failure_discard);
2030 c4iw_l2t_send(&ep->com.dev->rdev, skb, ep->l2t);
2035 static void reject_cr(struct c4iw_dev *dev, u32 hwtid, struct sk_buff *skb)
2037 PDBG("%s c4iw_dev %p tid %u\n", __func__, dev, hwtid);
2038 BUG_ON(skb_cloned(skb));
2039 skb_trim(skb, sizeof(struct cpl_tid_release));
2041 release_tid(&dev->rdev, hwtid, skb);
2045 static void get_4tuple(struct cpl_pass_accept_req *req, int *iptype,
2046 __u8 *local_ip, __u8 *peer_ip,
2047 __be16 *local_port, __be16 *peer_port)
2049 int eth_len = G_ETH_HDR_LEN(be32_to_cpu(req->hdr_len));
2050 int ip_len = G_IP_HDR_LEN(be32_to_cpu(req->hdr_len));
2051 struct iphdr *ip = (struct iphdr *)((u8 *)(req + 1) + eth_len);
2052 struct ipv6hdr *ip6 = (struct ipv6hdr *)((u8 *)(req + 1) + eth_len);
2053 struct tcphdr *tcp = (struct tcphdr *)
2054 ((u8 *)(req + 1) + eth_len + ip_len);
2056 if (ip->version == 4) {
2057 PDBG("%s saddr 0x%x daddr 0x%x sport %u dport %u\n", __func__,
2058 ntohl(ip->saddr), ntohl(ip->daddr), ntohs(tcp->source),
2061 memcpy(peer_ip, &ip->saddr, 4);
2062 memcpy(local_ip, &ip->daddr, 4);
2064 PDBG("%s saddr %pI6 daddr %pI6 sport %u dport %u\n", __func__,
2065 ip6->saddr.s6_addr, ip6->daddr.s6_addr, ntohs(tcp->source),
2068 memcpy(peer_ip, ip6->saddr.s6_addr, 16);
2069 memcpy(local_ip, ip6->daddr.s6_addr, 16);
2071 *peer_port = tcp->source;
2072 *local_port = tcp->dest;
2077 static int pass_accept_req(struct c4iw_dev *dev, struct sk_buff *skb)
2079 struct c4iw_ep *child_ep = NULL, *parent_ep;
2080 struct cpl_pass_accept_req *req = cplhdr(skb);
2081 unsigned int stid = GET_POPEN_TID(ntohl(req->tos_stid));
2082 struct tid_info *t = dev->rdev.lldi.tids;
2083 unsigned int hwtid = GET_TID(req);
2084 struct dst_entry *dst;
2085 __u8 local_ip[16], peer_ip[16];
2086 __be16 local_port, peer_port;
2088 u16 peer_mss = ntohs(req->tcpopt.mss);
2091 parent_ep = lookup_stid(t, stid);
2093 PDBG("%s connect request on invalid stid %d\n", __func__, stid);
2097 if (state_read(&parent_ep->com) != LISTEN) {
2098 printk(KERN_ERR "%s - listening ep not in LISTEN\n",
2103 get_4tuple(req, &iptype, local_ip, peer_ip, &local_port, &peer_port);
2105 /* Find output route */
2107 PDBG("%s parent ep %p hwtid %u laddr %pI4 raddr %pI4 lport %d rport %d peer_mss %d\n"
2108 , __func__, parent_ep, hwtid,
2109 local_ip, peer_ip, ntohs(local_port),
2110 ntohs(peer_port), peer_mss);
2111 dst = find_route(dev, *(__be32 *)local_ip, *(__be32 *)peer_ip,
2112 local_port, peer_port,
2113 GET_POPEN_TOS(ntohl(req->tos_stid)));
2115 PDBG("%s parent ep %p hwtid %u laddr %pI6 raddr %pI6 lport %d rport %d peer_mss %d\n"
2116 , __func__, parent_ep, hwtid,
2117 local_ip, peer_ip, ntohs(local_port),
2118 ntohs(peer_port), peer_mss);
2119 dst = find_route6(dev, local_ip, peer_ip, local_port, peer_port,
2120 PASS_OPEN_TOS(ntohl(req->tos_stid)),
2121 ((struct sockaddr_in6 *)
2122 &parent_ep->com.local_addr)->sin6_scope_id);
2125 printk(KERN_ERR MOD "%s - failed to find dst entry!\n",
2130 child_ep = alloc_ep(sizeof(*child_ep), GFP_KERNEL);
2132 printk(KERN_ERR MOD "%s - failed to allocate ep entry!\n",
2138 err = import_ep(child_ep, iptype, peer_ip, dst, dev, false);
2140 printk(KERN_ERR MOD "%s - failed to allocate l2t entry!\n",
2147 if (peer_mss && child_ep->mtu > (peer_mss + 40))
2148 child_ep->mtu = peer_mss + 40;
2150 state_set(&child_ep->com, CONNECTING);
2151 child_ep->com.dev = dev;
2152 child_ep->com.cm_id = NULL;
2154 struct sockaddr_in *sin = (struct sockaddr_in *)
2155 &child_ep->com.local_addr;
2156 sin->sin_family = PF_INET;
2157 sin->sin_port = local_port;
2158 sin->sin_addr.s_addr = *(__be32 *)local_ip;
2159 sin = (struct sockaddr_in *)&child_ep->com.remote_addr;
2160 sin->sin_family = PF_INET;
2161 sin->sin_port = peer_port;
2162 sin->sin_addr.s_addr = *(__be32 *)peer_ip;
2164 struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *)
2165 &child_ep->com.local_addr;
2166 sin6->sin6_family = PF_INET6;
2167 sin6->sin6_port = local_port;
2168 memcpy(sin6->sin6_addr.s6_addr, local_ip, 16);
2169 sin6 = (struct sockaddr_in6 *)&child_ep->com.remote_addr;
2170 sin6->sin6_family = PF_INET6;
2171 sin6->sin6_port = peer_port;
2172 memcpy(sin6->sin6_addr.s6_addr, peer_ip, 16);
2174 c4iw_get_ep(&parent_ep->com);
2175 child_ep->parent_ep = parent_ep;
2176 child_ep->tos = GET_POPEN_TOS(ntohl(req->tos_stid));
2177 child_ep->dst = dst;
2178 child_ep->hwtid = hwtid;
2180 PDBG("%s tx_chan %u smac_idx %u rss_qid %u\n", __func__,
2181 child_ep->tx_chan, child_ep->smac_idx, child_ep->rss_qid);
2183 init_timer(&child_ep->timer);
2184 cxgb4_insert_tid(t, child_ep, hwtid);
2185 insert_handle(dev, &dev->hwtid_idr, child_ep, child_ep->hwtid);
2186 accept_cr(child_ep, skb, req);
2187 set_bit(PASS_ACCEPT_REQ, &child_ep->com.history);
2190 reject_cr(dev, hwtid, skb);
2195 static int pass_establish(struct c4iw_dev *dev, struct sk_buff *skb)
2198 struct cpl_pass_establish *req = cplhdr(skb);
2199 struct tid_info *t = dev->rdev.lldi.tids;
2200 unsigned int tid = GET_TID(req);
2202 ep = lookup_tid(t, tid);
2203 PDBG("%s ep %p tid %u\n", __func__, ep, ep->hwtid);
2204 ep->snd_seq = be32_to_cpu(req->snd_isn);
2205 ep->rcv_seq = be32_to_cpu(req->rcv_isn);
2207 PDBG("%s ep %p hwtid %u tcp_opt 0x%02x\n", __func__, ep, tid,
2208 ntohs(req->tcp_opt));
2210 set_emss(ep, ntohs(req->tcp_opt));
2212 dst_confirm(ep->dst);
2213 state_set(&ep->com, MPA_REQ_WAIT);
2215 send_flowc(ep, skb);
2216 set_bit(PASS_ESTAB, &ep->com.history);
2221 static int peer_close(struct c4iw_dev *dev, struct sk_buff *skb)
2223 struct cpl_peer_close *hdr = cplhdr(skb);
2225 struct c4iw_qp_attributes attrs;
2228 struct tid_info *t = dev->rdev.lldi.tids;
2229 unsigned int tid = GET_TID(hdr);
2232 ep = lookup_tid(t, tid);
2233 PDBG("%s ep %p tid %u\n", __func__, ep, ep->hwtid);
2234 dst_confirm(ep->dst);
2236 set_bit(PEER_CLOSE, &ep->com.history);
2237 mutex_lock(&ep->com.mutex);
2238 switch (ep->com.state) {
2240 __state_set(&ep->com, CLOSING);
2243 __state_set(&ep->com, CLOSING);
2244 connect_reply_upcall(ep, -ECONNRESET);
2249 * We're gonna mark this puppy DEAD, but keep
2250 * the reference on it until the ULP accepts or
2251 * rejects the CR. Also wake up anyone waiting
2252 * in rdma connection migration (see c4iw_accept_cr()).
2254 __state_set(&ep->com, CLOSING);
2255 PDBG("waking up ep %p tid %u\n", ep, ep->hwtid);
2256 c4iw_wake_up(&ep->com.wr_wait, -ECONNRESET);
2259 __state_set(&ep->com, CLOSING);
2260 PDBG("waking up ep %p tid %u\n", ep, ep->hwtid);
2261 c4iw_wake_up(&ep->com.wr_wait, -ECONNRESET);
2265 __state_set(&ep->com, CLOSING);
2266 attrs.next_state = C4IW_QP_STATE_CLOSING;
2267 ret = c4iw_modify_qp(ep->com.qp->rhp, ep->com.qp,
2268 C4IW_QP_ATTR_NEXT_STATE, &attrs, 1);
2269 if (ret != -ECONNRESET) {
2270 peer_close_upcall(ep);
2278 __state_set(&ep->com, MORIBUND);
2283 if (ep->com.cm_id && ep->com.qp) {
2284 attrs.next_state = C4IW_QP_STATE_IDLE;
2285 c4iw_modify_qp(ep->com.qp->rhp, ep->com.qp,
2286 C4IW_QP_ATTR_NEXT_STATE, &attrs, 1);
2288 close_complete_upcall(ep);
2289 __state_set(&ep->com, DEAD);
2299 mutex_unlock(&ep->com.mutex);
2301 c4iw_ep_disconnect(ep, 0, GFP_KERNEL);
2303 release_ep_resources(ep);
2308 * Returns whether an ABORT_REQ_RSS message is a negative advice.
2310 static int is_neg_adv_abort(unsigned int status)
2312 return status == CPL_ERR_RTX_NEG_ADVICE ||
2313 status == CPL_ERR_PERSIST_NEG_ADVICE;
2316 static int peer_abort(struct c4iw_dev *dev, struct sk_buff *skb)
2318 struct cpl_abort_req_rss *req = cplhdr(skb);
2320 struct cpl_abort_rpl *rpl;
2321 struct sk_buff *rpl_skb;
2322 struct c4iw_qp_attributes attrs;
2325 struct tid_info *t = dev->rdev.lldi.tids;
2326 unsigned int tid = GET_TID(req);
2328 ep = lookup_tid(t, tid);
2329 if (is_neg_adv_abort(req->status)) {
2330 PDBG("%s neg_adv_abort ep %p tid %u\n", __func__, ep,
2334 PDBG("%s ep %p tid %u state %u\n", __func__, ep, ep->hwtid,
2336 set_bit(PEER_ABORT, &ep->com.history);
2339 * Wake up any threads in rdma_init() or rdma_fini().
2340 * However, this is not needed if com state is just
2343 if (ep->com.state != MPA_REQ_SENT)
2344 c4iw_wake_up(&ep->com.wr_wait, -ECONNRESET);
2346 mutex_lock(&ep->com.mutex);
2347 switch (ep->com.state) {
2355 if (mpa_rev == 1 || (mpa_rev == 2 && ep->tried_with_mpa_v1))
2356 connect_reply_upcall(ep, -ECONNRESET);
2359 * we just don't send notification upwards because we
2360 * want to retry with mpa_v1 without upper layers even
2363 * do some housekeeping so as to re-initiate the
2366 PDBG("%s: mpa_rev=%d. Retrying with mpav1\n", __func__,
2368 ep->retry_with_mpa_v1 = 1;
2380 if (ep->com.cm_id && ep->com.qp) {
2381 attrs.next_state = C4IW_QP_STATE_ERROR;
2382 ret = c4iw_modify_qp(ep->com.qp->rhp,
2383 ep->com.qp, C4IW_QP_ATTR_NEXT_STATE,
2387 "%s - qp <- error failed!\n",
2390 peer_abort_upcall(ep);
2395 PDBG("%s PEER_ABORT IN DEAD STATE!!!!\n", __func__);
2396 mutex_unlock(&ep->com.mutex);
2402 dst_confirm(ep->dst);
2403 if (ep->com.state != ABORTING) {
2404 __state_set(&ep->com, DEAD);
2405 /* we don't release if we want to retry with mpa_v1 */
2406 if (!ep->retry_with_mpa_v1)
2409 mutex_unlock(&ep->com.mutex);
2411 rpl_skb = get_skb(skb, sizeof(*rpl), GFP_KERNEL);
2413 printk(KERN_ERR MOD "%s - cannot allocate skb!\n",
2418 set_wr_txq(skb, CPL_PRIORITY_DATA, ep->txq_idx);
2419 rpl = (struct cpl_abort_rpl *) skb_put(rpl_skb, sizeof(*rpl));
2420 INIT_TP_WR(rpl, ep->hwtid);
2421 OPCODE_TID(rpl) = cpu_to_be32(MK_OPCODE_TID(CPL_ABORT_RPL, ep->hwtid));
2422 rpl->cmd = CPL_ABORT_NO_RST;
2423 c4iw_ofld_send(&ep->com.dev->rdev, rpl_skb);
2426 release_ep_resources(ep);
2427 else if (ep->retry_with_mpa_v1) {
2428 remove_handle(ep->com.dev, &ep->com.dev->hwtid_idr, ep->hwtid);
2429 cxgb4_remove_tid(ep->com.dev->rdev.lldi.tids, 0, ep->hwtid);
2430 dst_release(ep->dst);
2431 cxgb4_l2t_release(ep->l2t);
2438 static int close_con_rpl(struct c4iw_dev *dev, struct sk_buff *skb)
2441 struct c4iw_qp_attributes attrs;
2442 struct cpl_close_con_rpl *rpl = cplhdr(skb);
2444 struct tid_info *t = dev->rdev.lldi.tids;
2445 unsigned int tid = GET_TID(rpl);
2447 ep = lookup_tid(t, tid);
2449 PDBG("%s ep %p tid %u\n", __func__, ep, ep->hwtid);
2452 /* The cm_id may be null if we failed to connect */
2453 mutex_lock(&ep->com.mutex);
2454 switch (ep->com.state) {
2456 __state_set(&ep->com, MORIBUND);
2460 if ((ep->com.cm_id) && (ep->com.qp)) {
2461 attrs.next_state = C4IW_QP_STATE_IDLE;
2462 c4iw_modify_qp(ep->com.qp->rhp,
2464 C4IW_QP_ATTR_NEXT_STATE,
2467 close_complete_upcall(ep);
2468 __state_set(&ep->com, DEAD);
2478 mutex_unlock(&ep->com.mutex);
2480 release_ep_resources(ep);
2484 static int terminate(struct c4iw_dev *dev, struct sk_buff *skb)
2486 struct cpl_rdma_terminate *rpl = cplhdr(skb);
2487 struct tid_info *t = dev->rdev.lldi.tids;
2488 unsigned int tid = GET_TID(rpl);
2490 struct c4iw_qp_attributes attrs;
2492 ep = lookup_tid(t, tid);
2495 if (ep && ep->com.qp) {
2496 printk(KERN_WARNING MOD "TERM received tid %u qpid %u\n", tid,
2497 ep->com.qp->wq.sq.qid);
2498 attrs.next_state = C4IW_QP_STATE_TERMINATE;
2499 c4iw_modify_qp(ep->com.qp->rhp, ep->com.qp,
2500 C4IW_QP_ATTR_NEXT_STATE, &attrs, 1);
2502 printk(KERN_WARNING MOD "TERM received tid %u no ep/qp\n", tid);
2508 * Upcall from the adapter indicating data has been transmitted.
2509 * For us its just the single MPA request or reply. We can now free
2510 * the skb holding the mpa message.
2512 static int fw4_ack(struct c4iw_dev *dev, struct sk_buff *skb)
2515 struct cpl_fw4_ack *hdr = cplhdr(skb);
2516 u8 credits = hdr->credits;
2517 unsigned int tid = GET_TID(hdr);
2518 struct tid_info *t = dev->rdev.lldi.tids;
2521 ep = lookup_tid(t, tid);
2522 PDBG("%s ep %p tid %u credits %u\n", __func__, ep, ep->hwtid, credits);
2524 PDBG("%s 0 credit ack ep %p tid %u state %u\n",
2525 __func__, ep, ep->hwtid, state_read(&ep->com));
2529 dst_confirm(ep->dst);
2531 PDBG("%s last streaming msg ack ep %p tid %u state %u "
2532 "initiator %u freeing skb\n", __func__, ep, ep->hwtid,
2533 state_read(&ep->com), ep->mpa_attr.initiator ? 1 : 0);
2534 kfree_skb(ep->mpa_skb);
2540 int c4iw_reject_cr(struct iw_cm_id *cm_id, const void *pdata, u8 pdata_len)
2543 struct c4iw_ep *ep = to_ep(cm_id);
2544 PDBG("%s ep %p tid %u\n", __func__, ep, ep->hwtid);
2546 if (state_read(&ep->com) == DEAD) {
2547 c4iw_put_ep(&ep->com);
2550 set_bit(ULP_REJECT, &ep->com.history);
2551 BUG_ON(state_read(&ep->com) != MPA_REQ_RCVD);
2553 abort_connection(ep, NULL, GFP_KERNEL);
2555 err = send_mpa_reject(ep, pdata, pdata_len);
2556 err = c4iw_ep_disconnect(ep, 0, GFP_KERNEL);
2558 c4iw_put_ep(&ep->com);
2562 int c4iw_accept_cr(struct iw_cm_id *cm_id, struct iw_cm_conn_param *conn_param)
2565 struct c4iw_qp_attributes attrs;
2566 enum c4iw_qp_attr_mask mask;
2567 struct c4iw_ep *ep = to_ep(cm_id);
2568 struct c4iw_dev *h = to_c4iw_dev(cm_id->device);
2569 struct c4iw_qp *qp = get_qhp(h, conn_param->qpn);
2571 PDBG("%s ep %p tid %u\n", __func__, ep, ep->hwtid);
2572 if (state_read(&ep->com) == DEAD) {
2577 BUG_ON(state_read(&ep->com) != MPA_REQ_RCVD);
2580 set_bit(ULP_ACCEPT, &ep->com.history);
2581 if ((conn_param->ord > c4iw_max_read_depth) ||
2582 (conn_param->ird > c4iw_max_read_depth)) {
2583 abort_connection(ep, NULL, GFP_KERNEL);
2588 if (ep->mpa_attr.version == 2 && ep->mpa_attr.enhanced_rdma_conn) {
2589 if (conn_param->ord > ep->ird) {
2590 ep->ird = conn_param->ird;
2591 ep->ord = conn_param->ord;
2592 send_mpa_reject(ep, conn_param->private_data,
2593 conn_param->private_data_len);
2594 abort_connection(ep, NULL, GFP_KERNEL);
2598 if (conn_param->ird > ep->ord) {
2600 conn_param->ird = 1;
2602 abort_connection(ep, NULL, GFP_KERNEL);
2609 ep->ird = conn_param->ird;
2610 ep->ord = conn_param->ord;
2612 if (ep->mpa_attr.version != 2)
2613 if (peer2peer && ep->ird == 0)
2616 PDBG("%s %d ird %d ord %d\n", __func__, __LINE__, ep->ird, ep->ord);
2618 cm_id->add_ref(cm_id);
2619 ep->com.cm_id = cm_id;
2623 /* bind QP to EP and move to RTS */
2624 attrs.mpa_attr = ep->mpa_attr;
2625 attrs.max_ird = ep->ird;
2626 attrs.max_ord = ep->ord;
2627 attrs.llp_stream_handle = ep;
2628 attrs.next_state = C4IW_QP_STATE_RTS;
2630 /* bind QP and TID with INIT_WR */
2631 mask = C4IW_QP_ATTR_NEXT_STATE |
2632 C4IW_QP_ATTR_LLP_STREAM_HANDLE |
2633 C4IW_QP_ATTR_MPA_ATTR |
2634 C4IW_QP_ATTR_MAX_IRD |
2635 C4IW_QP_ATTR_MAX_ORD;
2637 err = c4iw_modify_qp(ep->com.qp->rhp,
2638 ep->com.qp, mask, &attrs, 1);
2641 err = send_mpa_reply(ep, conn_param->private_data,
2642 conn_param->private_data_len);
2646 state_set(&ep->com, FPDU_MODE);
2647 established_upcall(ep);
2648 c4iw_put_ep(&ep->com);
2651 ep->com.cm_id = NULL;
2652 cm_id->rem_ref(cm_id);
2654 c4iw_put_ep(&ep->com);
2658 static int pick_local_ipaddrs(struct c4iw_dev *dev, struct iw_cm_id *cm_id)
2660 struct in_device *ind;
2662 struct sockaddr_in *laddr = (struct sockaddr_in *)&cm_id->local_addr;
2663 struct sockaddr_in *raddr = (struct sockaddr_in *)&cm_id->remote_addr;
2665 ind = in_dev_get(dev->rdev.lldi.ports[0]);
2667 return -EADDRNOTAVAIL;
2668 for_primary_ifa(ind) {
2669 laddr->sin_addr.s_addr = ifa->ifa_address;
2670 raddr->sin_addr.s_addr = ifa->ifa_address;
2676 return found ? 0 : -EADDRNOTAVAIL;
2679 static int get_lladdr(struct net_device *dev, struct in6_addr *addr,
2680 unsigned char banned_flags)
2682 struct inet6_dev *idev;
2683 int err = -EADDRNOTAVAIL;
2686 idev = __in6_dev_get(dev);
2688 struct inet6_ifaddr *ifp;
2690 read_lock_bh(&idev->lock);
2691 list_for_each_entry(ifp, &idev->addr_list, if_list) {
2692 if (ifp->scope == IFA_LINK &&
2693 !(ifp->flags & banned_flags)) {
2694 memcpy(addr, &ifp->addr, 16);
2699 read_unlock_bh(&idev->lock);
2705 static int pick_local_ip6addrs(struct c4iw_dev *dev, struct iw_cm_id *cm_id)
2707 struct in6_addr uninitialized_var(addr);
2708 struct sockaddr_in6 *la6 = (struct sockaddr_in6 *)&cm_id->local_addr;
2709 struct sockaddr_in6 *ra6 = (struct sockaddr_in6 *)&cm_id->remote_addr;
2711 if (get_lladdr(dev->rdev.lldi.ports[0], &addr, IFA_F_TENTATIVE)) {
2712 memcpy(la6->sin6_addr.s6_addr, &addr, 16);
2713 memcpy(ra6->sin6_addr.s6_addr, &addr, 16);
2716 return -EADDRNOTAVAIL;
2719 int c4iw_connect(struct iw_cm_id *cm_id, struct iw_cm_conn_param *conn_param)
2721 struct c4iw_dev *dev = to_c4iw_dev(cm_id->device);
2724 struct sockaddr_in *laddr = (struct sockaddr_in *)&cm_id->local_addr;
2725 struct sockaddr_in *raddr = (struct sockaddr_in *)&cm_id->remote_addr;
2726 struct sockaddr_in6 *laddr6 = (struct sockaddr_in6 *)&cm_id->local_addr;
2727 struct sockaddr_in6 *raddr6 = (struct sockaddr_in6 *)
2728 &cm_id->remote_addr;
2732 if ((conn_param->ord > c4iw_max_read_depth) ||
2733 (conn_param->ird > c4iw_max_read_depth)) {
2737 ep = alloc_ep(sizeof(*ep), GFP_KERNEL);
2739 printk(KERN_ERR MOD "%s - cannot alloc ep.\n", __func__);
2743 init_timer(&ep->timer);
2744 ep->plen = conn_param->private_data_len;
2746 memcpy(ep->mpa_pkt + sizeof(struct mpa_message),
2747 conn_param->private_data, ep->plen);
2748 ep->ird = conn_param->ird;
2749 ep->ord = conn_param->ord;
2751 if (peer2peer && ep->ord == 0)
2754 cm_id->add_ref(cm_id);
2756 ep->com.cm_id = cm_id;
2757 ep->com.qp = get_qhp(dev, conn_param->qpn);
2759 PDBG("%s qpn 0x%x not found!\n", __func__, conn_param->qpn);
2764 PDBG("%s qpn 0x%x qp %p cm_id %p\n", __func__, conn_param->qpn,
2768 * Allocate an active TID to initiate a TCP connection.
2770 ep->atid = cxgb4_alloc_atid(dev->rdev.lldi.tids, ep);
2771 if (ep->atid == -1) {
2772 printk(KERN_ERR MOD "%s - cannot alloc atid.\n", __func__);
2776 insert_handle(dev, &dev->atid_idr, ep, ep->atid);
2778 if (cm_id->remote_addr.ss_family == AF_INET) {
2780 ra = (__u8 *)&raddr->sin_addr;
2783 * Handle loopback requests to INADDR_ANY.
2785 if ((__force int)raddr->sin_addr.s_addr == INADDR_ANY) {
2786 err = pick_local_ipaddrs(dev, cm_id);
2792 PDBG("%s saddr %pI4 sport 0x%x raddr %pI4 rport 0x%x\n",
2793 __func__, &laddr->sin_addr, ntohs(laddr->sin_port),
2794 ra, ntohs(raddr->sin_port));
2795 ep->dst = find_route(dev, laddr->sin_addr.s_addr,
2796 raddr->sin_addr.s_addr, laddr->sin_port,
2797 raddr->sin_port, 0);
2800 ra = (__u8 *)&raddr6->sin6_addr;
2803 * Handle loopback requests to INADDR_ANY.
2805 if (ipv6_addr_type(&raddr6->sin6_addr) == IPV6_ADDR_ANY) {
2806 err = pick_local_ip6addrs(dev, cm_id);
2812 PDBG("%s saddr %pI6 sport 0x%x raddr %pI6 rport 0x%x\n",
2813 __func__, laddr6->sin6_addr.s6_addr,
2814 ntohs(laddr6->sin6_port),
2815 raddr6->sin6_addr.s6_addr, ntohs(raddr6->sin6_port));
2816 ep->dst = find_route6(dev, laddr6->sin6_addr.s6_addr,
2817 raddr6->sin6_addr.s6_addr,
2818 laddr6->sin6_port, raddr6->sin6_port, 0,
2819 raddr6->sin6_scope_id);
2822 printk(KERN_ERR MOD "%s - cannot find route.\n", __func__);
2823 err = -EHOSTUNREACH;
2827 err = import_ep(ep, iptype, ra, ep->dst, ep->com.dev, true);
2829 printk(KERN_ERR MOD "%s - cannot alloc l2e.\n", __func__);
2833 PDBG("%s txq_idx %u tx_chan %u smac_idx %u rss_qid %u l2t_idx %u\n",
2834 __func__, ep->txq_idx, ep->tx_chan, ep->smac_idx, ep->rss_qid,
2837 state_set(&ep->com, CONNECTING);
2839 memcpy(&ep->com.local_addr, &cm_id->local_addr,
2840 sizeof(ep->com.local_addr));
2841 memcpy(&ep->com.remote_addr, &cm_id->remote_addr,
2842 sizeof(ep->com.remote_addr));
2844 /* send connect request to rnic */
2845 err = send_connect(ep);
2849 cxgb4_l2t_release(ep->l2t);
2851 dst_release(ep->dst);
2853 remove_handle(ep->com.dev, &ep->com.dev->atid_idr, ep->atid);
2854 cxgb4_free_atid(ep->com.dev->rdev.lldi.tids, ep->atid);
2856 cm_id->rem_ref(cm_id);
2857 c4iw_put_ep(&ep->com);
2862 static int create_server6(struct c4iw_dev *dev, struct c4iw_listen_ep *ep)
2865 struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *)&ep->com.local_addr;
2867 c4iw_init_wr_wait(&ep->com.wr_wait);
2868 err = cxgb4_create_server6(ep->com.dev->rdev.lldi.ports[0],
2869 ep->stid, &sin6->sin6_addr,
2871 ep->com.dev->rdev.lldi.rxq_ids[0]);
2873 err = c4iw_wait_for_reply(&ep->com.dev->rdev,
2877 pr_err("cxgb4_create_server6/filter failed err %d stid %d laddr %pI6 lport %d\n",
2879 sin6->sin6_addr.s6_addr, ntohs(sin6->sin6_port));
2883 static int create_server4(struct c4iw_dev *dev, struct c4iw_listen_ep *ep)
2886 struct sockaddr_in *sin = (struct sockaddr_in *)&ep->com.local_addr;
2888 if (dev->rdev.lldi.enable_fw_ofld_conn) {
2890 err = cxgb4_create_server_filter(
2891 ep->com.dev->rdev.lldi.ports[0], ep->stid,
2892 sin->sin_addr.s_addr, sin->sin_port, 0,
2893 ep->com.dev->rdev.lldi.rxq_ids[0], 0, 0);
2894 if (err == -EBUSY) {
2895 set_current_state(TASK_UNINTERRUPTIBLE);
2896 schedule_timeout(usecs_to_jiffies(100));
2898 } while (err == -EBUSY);
2900 c4iw_init_wr_wait(&ep->com.wr_wait);
2901 err = cxgb4_create_server(ep->com.dev->rdev.lldi.ports[0],
2902 ep->stid, sin->sin_addr.s_addr, sin->sin_port,
2903 0, ep->com.dev->rdev.lldi.rxq_ids[0]);
2905 err = c4iw_wait_for_reply(&ep->com.dev->rdev,
2910 pr_err("cxgb4_create_server/filter failed err %d stid %d laddr %pI4 lport %d\n"
2912 &sin->sin_addr, ntohs(sin->sin_port));
2916 int c4iw_create_listen(struct iw_cm_id *cm_id, int backlog)
2919 struct c4iw_dev *dev = to_c4iw_dev(cm_id->device);
2920 struct c4iw_listen_ep *ep;
2924 ep = alloc_ep(sizeof(*ep), GFP_KERNEL);
2926 printk(KERN_ERR MOD "%s - cannot alloc ep.\n", __func__);
2930 PDBG("%s ep %p\n", __func__, ep);
2931 cm_id->add_ref(cm_id);
2932 ep->com.cm_id = cm_id;
2934 ep->backlog = backlog;
2935 memcpy(&ep->com.local_addr, &cm_id->local_addr,
2936 sizeof(ep->com.local_addr));
2939 * Allocate a server TID.
2941 if (dev->rdev.lldi.enable_fw_ofld_conn)
2942 ep->stid = cxgb4_alloc_sftid(dev->rdev.lldi.tids,
2943 cm_id->local_addr.ss_family, ep);
2945 ep->stid = cxgb4_alloc_stid(dev->rdev.lldi.tids,
2946 cm_id->local_addr.ss_family, ep);
2948 if (ep->stid == -1) {
2949 printk(KERN_ERR MOD "%s - cannot alloc stid.\n", __func__);
2953 insert_handle(dev, &dev->stid_idr, ep, ep->stid);
2954 state_set(&ep->com, LISTEN);
2955 if (ep->com.local_addr.ss_family == AF_INET)
2956 err = create_server4(dev, ep);
2958 err = create_server6(dev, ep);
2960 cm_id->provider_data = ep;
2963 cxgb4_free_stid(ep->com.dev->rdev.lldi.tids, ep->stid,
2964 ep->com.local_addr.ss_family);
2966 cm_id->rem_ref(cm_id);
2967 c4iw_put_ep(&ep->com);
2973 int c4iw_destroy_listen(struct iw_cm_id *cm_id)
2976 struct c4iw_listen_ep *ep = to_listen_ep(cm_id);
2978 PDBG("%s ep %p\n", __func__, ep);
2981 state_set(&ep->com, DEAD);
2982 if (ep->com.dev->rdev.lldi.enable_fw_ofld_conn &&
2983 ep->com.local_addr.ss_family == AF_INET) {
2984 err = cxgb4_remove_server_filter(
2985 ep->com.dev->rdev.lldi.ports[0], ep->stid,
2986 ep->com.dev->rdev.lldi.rxq_ids[0], 0);
2988 c4iw_init_wr_wait(&ep->com.wr_wait);
2989 err = cxgb4_remove_server(
2990 ep->com.dev->rdev.lldi.ports[0], ep->stid,
2991 ep->com.dev->rdev.lldi.rxq_ids[0], 0);
2994 err = c4iw_wait_for_reply(&ep->com.dev->rdev, &ep->com.wr_wait,
2997 remove_handle(ep->com.dev, &ep->com.dev->stid_idr, ep->stid);
2998 cxgb4_free_stid(ep->com.dev->rdev.lldi.tids, ep->stid,
2999 ep->com.local_addr.ss_family);
3001 cm_id->rem_ref(cm_id);
3002 c4iw_put_ep(&ep->com);
3006 int c4iw_ep_disconnect(struct c4iw_ep *ep, int abrupt, gfp_t gfp)
3011 struct c4iw_rdev *rdev;
3013 mutex_lock(&ep->com.mutex);
3015 PDBG("%s ep %p state %s, abrupt %d\n", __func__, ep,
3016 states[ep->com.state], abrupt);
3018 rdev = &ep->com.dev->rdev;
3019 if (c4iw_fatal_error(rdev)) {
3021 close_complete_upcall(ep);
3022 ep->com.state = DEAD;
3024 switch (ep->com.state) {
3032 ep->com.state = ABORTING;
3034 ep->com.state = CLOSING;
3037 set_bit(CLOSE_SENT, &ep->com.flags);
3040 if (!test_and_set_bit(CLOSE_SENT, &ep->com.flags)) {
3044 ep->com.state = ABORTING;
3046 ep->com.state = MORIBUND;
3052 PDBG("%s ignoring disconnect ep %p state %u\n",
3053 __func__, ep, ep->com.state);
3062 set_bit(EP_DISC_ABORT, &ep->com.history);
3063 close_complete_upcall(ep);
3064 ret = send_abort(ep, NULL, gfp);
3066 set_bit(EP_DISC_CLOSE, &ep->com.history);
3067 ret = send_halfclose(ep, gfp);
3072 mutex_unlock(&ep->com.mutex);
3074 release_ep_resources(ep);
3078 static void active_ofld_conn_reply(struct c4iw_dev *dev, struct sk_buff *skb,
3079 struct cpl_fw6_msg_ofld_connection_wr_rpl *req)
3082 int atid = be32_to_cpu(req->tid);
3084 ep = (struct c4iw_ep *)lookup_atid(dev->rdev.lldi.tids,
3085 (__force u32) req->tid);
3089 switch (req->retval) {
3091 set_bit(ACT_RETRY_NOMEM, &ep->com.history);
3092 if (ep->retry_count++ < ACT_OPEN_RETRY_COUNT) {
3093 send_fw_act_open_req(ep, atid);
3097 set_bit(ACT_RETRY_INUSE, &ep->com.history);
3098 if (ep->retry_count++ < ACT_OPEN_RETRY_COUNT) {
3099 send_fw_act_open_req(ep, atid);
3104 pr_info("%s unexpected ofld conn wr retval %d\n",
3105 __func__, req->retval);
3108 pr_err("active ofld_connect_wr failure %d atid %d\n",
3110 mutex_lock(&dev->rdev.stats.lock);
3111 dev->rdev.stats.act_ofld_conn_fails++;
3112 mutex_unlock(&dev->rdev.stats.lock);
3113 connect_reply_upcall(ep, status2errno(req->retval));
3114 state_set(&ep->com, DEAD);
3115 remove_handle(dev, &dev->atid_idr, atid);
3116 cxgb4_free_atid(dev->rdev.lldi.tids, atid);
3117 dst_release(ep->dst);
3118 cxgb4_l2t_release(ep->l2t);
3119 c4iw_put_ep(&ep->com);
3122 static void passive_ofld_conn_reply(struct c4iw_dev *dev, struct sk_buff *skb,
3123 struct cpl_fw6_msg_ofld_connection_wr_rpl *req)
3125 struct sk_buff *rpl_skb;
3126 struct cpl_pass_accept_req *cpl;
3129 rpl_skb = (struct sk_buff *)(unsigned long)req->cookie;
3132 PDBG("%s passive open failure %d\n", __func__, req->retval);
3133 mutex_lock(&dev->rdev.stats.lock);
3134 dev->rdev.stats.pas_ofld_conn_fails++;
3135 mutex_unlock(&dev->rdev.stats.lock);
3138 cpl = (struct cpl_pass_accept_req *)cplhdr(rpl_skb);
3139 OPCODE_TID(cpl) = htonl(MK_OPCODE_TID(CPL_PASS_ACCEPT_REQ,
3140 (__force u32) htonl(
3141 (__force u32) req->tid)));
3142 ret = pass_accept_req(dev, rpl_skb);
3149 static int deferred_fw6_msg(struct c4iw_dev *dev, struct sk_buff *skb)
3151 struct cpl_fw6_msg *rpl = cplhdr(skb);
3152 struct cpl_fw6_msg_ofld_connection_wr_rpl *req;
3154 switch (rpl->type) {
3156 c4iw_ev_dispatch(dev, (struct t4_cqe *)&rpl->data[0]);
3158 case FW6_TYPE_OFLD_CONNECTION_WR_RPL:
3159 req = (struct cpl_fw6_msg_ofld_connection_wr_rpl *)rpl->data;
3160 switch (req->t_state) {
3162 active_ofld_conn_reply(dev, skb, req);
3165 passive_ofld_conn_reply(dev, skb, req);
3168 pr_err("%s unexpected ofld conn wr state %d\n",
3169 __func__, req->t_state);
3177 static void build_cpl_pass_accept_req(struct sk_buff *skb, int stid , u8 tos)
3180 u16 vlantag, len, hdr_len, eth_hdr_len;
3182 struct cpl_rx_pkt *cpl = cplhdr(skb);
3183 struct cpl_pass_accept_req *req;
3184 struct tcp_options_received tmp_opt;
3185 struct c4iw_dev *dev;
3187 dev = *((struct c4iw_dev **) (skb->cb + sizeof(void *)));
3188 /* Store values from cpl_rx_pkt in temporary location. */
3189 vlantag = (__force u16) cpl->vlan;
3190 len = (__force u16) cpl->len;
3191 l2info = (__force u32) cpl->l2info;
3192 hdr_len = (__force u16) cpl->hdr_len;
3195 __skb_pull(skb, sizeof(*req) + sizeof(struct rss_header));
3198 * We need to parse the TCP options from SYN packet.
3199 * to generate cpl_pass_accept_req.
3201 memset(&tmp_opt, 0, sizeof(tmp_opt));
3202 tcp_clear_options(&tmp_opt);
3203 tcp_parse_options(skb, &tmp_opt, 0, NULL);
3205 req = (struct cpl_pass_accept_req *)__skb_push(skb, sizeof(*req));
3206 memset(req, 0, sizeof(*req));
3207 req->l2info = cpu_to_be16(V_SYN_INTF(intf) |
3208 V_SYN_MAC_IDX(G_RX_MACIDX(
3209 (__force int) htonl(l2info))) |
3211 eth_hdr_len = is_t4(dev->rdev.lldi.adapter_type) ?
3212 G_RX_ETHHDR_LEN((__force int) htonl(l2info)) :
3213 G_RX_T5_ETHHDR_LEN((__force int) htonl(l2info));
3214 req->hdr_len = cpu_to_be32(V_SYN_RX_CHAN(G_RX_CHAN(
3215 (__force int) htonl(l2info))) |
3216 V_TCP_HDR_LEN(G_RX_TCPHDR_LEN(
3217 (__force int) htons(hdr_len))) |
3218 V_IP_HDR_LEN(G_RX_IPHDR_LEN(
3219 (__force int) htons(hdr_len))) |
3220 V_ETH_HDR_LEN(G_RX_ETHHDR_LEN(eth_hdr_len)));
3221 req->vlan = (__force __be16) vlantag;
3222 req->len = (__force __be16) len;
3223 req->tos_stid = cpu_to_be32(PASS_OPEN_TID(stid) |
3224 PASS_OPEN_TOS(tos));
3225 req->tcpopt.mss = htons(tmp_opt.mss_clamp);
3226 if (tmp_opt.wscale_ok)
3227 req->tcpopt.wsf = tmp_opt.snd_wscale;
3228 req->tcpopt.tstamp = tmp_opt.saw_tstamp;
3229 if (tmp_opt.sack_ok)
3230 req->tcpopt.sack = 1;
3231 OPCODE_TID(req) = htonl(MK_OPCODE_TID(CPL_PASS_ACCEPT_REQ, 0));
3235 static void send_fw_pass_open_req(struct c4iw_dev *dev, struct sk_buff *skb,
3236 __be32 laddr, __be16 lport,
3237 __be32 raddr, __be16 rport,
3238 u32 rcv_isn, u32 filter, u16 window,
3239 u32 rss_qid, u8 port_id)
3241 struct sk_buff *req_skb;
3242 struct fw_ofld_connection_wr *req;
3243 struct cpl_pass_accept_req *cpl = cplhdr(skb);
3245 req_skb = alloc_skb(sizeof(struct fw_ofld_connection_wr), GFP_KERNEL);
3246 req = (struct fw_ofld_connection_wr *)__skb_put(req_skb, sizeof(*req));
3247 memset(req, 0, sizeof(*req));
3248 req->op_compl = htonl(V_WR_OP(FW_OFLD_CONNECTION_WR) | FW_WR_COMPL(1));
3249 req->len16_pkd = htonl(FW_WR_LEN16(DIV_ROUND_UP(sizeof(*req), 16)));
3250 req->le.version_cpl = htonl(F_FW_OFLD_CONNECTION_WR_CPL);
3251 req->le.filter = (__force __be32) filter;
3252 req->le.lport = lport;
3253 req->le.pport = rport;
3254 req->le.u.ipv4.lip = laddr;
3255 req->le.u.ipv4.pip = raddr;
3256 req->tcb.rcv_nxt = htonl(rcv_isn + 1);
3257 req->tcb.rcv_adv = htons(window);
3258 req->tcb.t_state_to_astid =
3259 htonl(V_FW_OFLD_CONNECTION_WR_T_STATE(TCP_SYN_RECV) |
3260 V_FW_OFLD_CONNECTION_WR_RCV_SCALE(cpl->tcpopt.wsf) |
3261 V_FW_OFLD_CONNECTION_WR_ASTID(
3262 GET_PASS_OPEN_TID(ntohl(cpl->tos_stid))));
3265 * We store the qid in opt2 which will be used by the firmware
3266 * to send us the wr response.
3268 req->tcb.opt2 = htonl(V_RSS_QUEUE(rss_qid));
3271 * We initialize the MSS index in TCB to 0xF.
3272 * So that when driver sends cpl_pass_accept_rpl
3273 * TCB picks up the correct value. If this was 0
3274 * TP will ignore any value > 0 for MSS index.
3276 req->tcb.opt0 = cpu_to_be64(V_MSS_IDX(0xF));
3277 req->cookie = (unsigned long)skb;
3279 set_wr_txq(req_skb, CPL_PRIORITY_CONTROL, port_id);
3280 cxgb4_ofld_send(dev->rdev.lldi.ports[0], req_skb);
3284 * Handler for CPL_RX_PKT message. Need to handle cpl_rx_pkt
3285 * messages when a filter is being used instead of server to
3286 * redirect a syn packet. When packets hit filter they are redirected
3287 * to the offload queue and driver tries to establish the connection
3288 * using firmware work request.
3290 static int rx_pkt(struct c4iw_dev *dev, struct sk_buff *skb)
3293 unsigned int filter;
3294 struct ethhdr *eh = NULL;
3295 struct vlan_ethhdr *vlan_eh = NULL;
3297 struct tcphdr *tcph;
3298 struct rss_header *rss = (void *)skb->data;
3299 struct cpl_rx_pkt *cpl = (void *)skb->data;
3300 struct cpl_pass_accept_req *req = (void *)(rss + 1);
3301 struct l2t_entry *e;
3302 struct dst_entry *dst;
3303 struct c4iw_ep *lep;
3305 struct port_info *pi;
3306 struct net_device *pdev;
3307 u16 rss_qid, eth_hdr_len;
3310 struct neighbour *neigh;
3312 /* Drop all non-SYN packets */
3313 if (!(cpl->l2info & cpu_to_be32(F_RXF_SYN)))
3317 * Drop all packets which did not hit the filter.
3318 * Unlikely to happen.
3320 if (!(rss->filter_hit && rss->filter_tid))
3324 * Calculate the server tid from filter hit index from cpl_rx_pkt.
3326 stid = (__force int) cpu_to_be32((__force u32) rss->hash_val)
3327 - dev->rdev.lldi.tids->sftid_base
3328 + dev->rdev.lldi.tids->nstids;
3330 lep = (struct c4iw_ep *)lookup_stid(dev->rdev.lldi.tids, stid);
3332 PDBG("%s connect request on invalid stid %d\n", __func__, stid);
3336 eth_hdr_len = is_t4(dev->rdev.lldi.adapter_type) ?
3337 G_RX_ETHHDR_LEN(htonl(cpl->l2info)) :
3338 G_RX_T5_ETHHDR_LEN(htonl(cpl->l2info));
3339 if (eth_hdr_len == ETH_HLEN) {
3340 eh = (struct ethhdr *)(req + 1);
3341 iph = (struct iphdr *)(eh + 1);
3343 vlan_eh = (struct vlan_ethhdr *)(req + 1);
3344 iph = (struct iphdr *)(vlan_eh + 1);
3345 skb->vlan_tci = ntohs(cpl->vlan);
3348 if (iph->version != 0x4)
3351 tcph = (struct tcphdr *)(iph + 1);
3352 skb_set_network_header(skb, (void *)iph - (void *)rss);
3353 skb_set_transport_header(skb, (void *)tcph - (void *)rss);
3356 PDBG("%s lip 0x%x lport %u pip 0x%x pport %u tos %d\n", __func__,
3357 ntohl(iph->daddr), ntohs(tcph->dest), ntohl(iph->saddr),
3358 ntohs(tcph->source), iph->tos);
3360 dst = find_route(dev, iph->daddr, iph->saddr, tcph->dest, tcph->source,
3363 pr_err("%s - failed to find dst entry!\n",
3367 neigh = dst_neigh_lookup_skb(dst, skb);
3370 pr_err("%s - failed to allocate neigh!\n",
3375 if (neigh->dev->flags & IFF_LOOPBACK) {
3376 pdev = ip_dev_find(&init_net, iph->daddr);
3377 e = cxgb4_l2t_get(dev->rdev.lldi.l2t, neigh,
3379 pi = (struct port_info *)netdev_priv(pdev);
3380 tx_chan = cxgb4_port_chan(pdev);
3383 pdev = get_real_dev(neigh->dev);
3384 e = cxgb4_l2t_get(dev->rdev.lldi.l2t, neigh,
3386 pi = (struct port_info *)netdev_priv(pdev);
3387 tx_chan = cxgb4_port_chan(pdev);
3390 pr_err("%s - failed to allocate l2t entry!\n",
3395 step = dev->rdev.lldi.nrxq / dev->rdev.lldi.nchan;
3396 rss_qid = dev->rdev.lldi.rxq_ids[pi->port_id * step];
3397 window = (__force u16) htons((__force u16)tcph->window);
3399 /* Calcuate filter portion for LE region. */
3400 filter = (__force unsigned int) cpu_to_be32(select_ntuple(dev, dst, e));
3403 * Synthesize the cpl_pass_accept_req. We have everything except the
3404 * TID. Once firmware sends a reply with TID we update the TID field
3405 * in cpl and pass it through the regular cpl_pass_accept_req path.
3407 build_cpl_pass_accept_req(skb, stid, iph->tos);
3408 send_fw_pass_open_req(dev, skb, iph->daddr, tcph->dest, iph->saddr,
3409 tcph->source, ntohl(tcph->seq), filter, window,
3410 rss_qid, pi->port_id);
3411 cxgb4_l2t_release(e);
3419 * These are the real handlers that are called from a
3422 static c4iw_handler_func work_handlers[NUM_CPL_CMDS] = {
3423 [CPL_ACT_ESTABLISH] = act_establish,
3424 [CPL_ACT_OPEN_RPL] = act_open_rpl,
3425 [CPL_RX_DATA] = rx_data,
3426 [CPL_ABORT_RPL_RSS] = abort_rpl,
3427 [CPL_ABORT_RPL] = abort_rpl,
3428 [CPL_PASS_OPEN_RPL] = pass_open_rpl,
3429 [CPL_CLOSE_LISTSRV_RPL] = close_listsrv_rpl,
3430 [CPL_PASS_ACCEPT_REQ] = pass_accept_req,
3431 [CPL_PASS_ESTABLISH] = pass_establish,
3432 [CPL_PEER_CLOSE] = peer_close,
3433 [CPL_ABORT_REQ_RSS] = peer_abort,
3434 [CPL_CLOSE_CON_RPL] = close_con_rpl,
3435 [CPL_RDMA_TERMINATE] = terminate,
3436 [CPL_FW4_ACK] = fw4_ack,
3437 [CPL_FW6_MSG] = deferred_fw6_msg,
3438 [CPL_RX_PKT] = rx_pkt
3441 static void process_timeout(struct c4iw_ep *ep)
3443 struct c4iw_qp_attributes attrs;
3446 mutex_lock(&ep->com.mutex);
3447 PDBG("%s ep %p tid %u state %d\n", __func__, ep, ep->hwtid,
3449 set_bit(TIMEDOUT, &ep->com.history);
3450 switch (ep->com.state) {
3452 __state_set(&ep->com, ABORTING);
3453 connect_reply_upcall(ep, -ETIMEDOUT);
3456 __state_set(&ep->com, ABORTING);
3460 if (ep->com.cm_id && ep->com.qp) {
3461 attrs.next_state = C4IW_QP_STATE_ERROR;
3462 c4iw_modify_qp(ep->com.qp->rhp,
3463 ep->com.qp, C4IW_QP_ATTR_NEXT_STATE,
3466 __state_set(&ep->com, ABORTING);
3469 WARN(1, "%s unexpected state ep %p tid %u state %u\n",
3470 __func__, ep, ep->hwtid, ep->com.state);
3473 mutex_unlock(&ep->com.mutex);
3475 abort_connection(ep, NULL, GFP_KERNEL);
3476 c4iw_put_ep(&ep->com);
3479 static void process_timedout_eps(void)
3483 spin_lock_irq(&timeout_lock);
3484 while (!list_empty(&timeout_list)) {
3485 struct list_head *tmp;
3487 tmp = timeout_list.next;
3489 spin_unlock_irq(&timeout_lock);
3490 ep = list_entry(tmp, struct c4iw_ep, entry);
3491 process_timeout(ep);
3492 spin_lock_irq(&timeout_lock);
3494 spin_unlock_irq(&timeout_lock);
3497 static void process_work(struct work_struct *work)
3499 struct sk_buff *skb = NULL;
3500 struct c4iw_dev *dev;
3501 struct cpl_act_establish *rpl;
3502 unsigned int opcode;
3505 while ((skb = skb_dequeue(&rxq))) {
3507 dev = *((struct c4iw_dev **) (skb->cb + sizeof(void *)));
3508 opcode = rpl->ot.opcode;
3510 BUG_ON(!work_handlers[opcode]);
3511 ret = work_handlers[opcode](dev, skb);
3515 process_timedout_eps();
3518 static DECLARE_WORK(skb_work, process_work);
3520 static void ep_timeout(unsigned long arg)
3522 struct c4iw_ep *ep = (struct c4iw_ep *)arg;
3525 spin_lock(&timeout_lock);
3526 if (!test_and_set_bit(TIMEOUT, &ep->com.flags)) {
3527 list_add_tail(&ep->entry, &timeout_list);
3530 spin_unlock(&timeout_lock);
3532 queue_work(workq, &skb_work);
3536 * All the CM events are handled on a work queue to have a safe context.
3538 static int sched(struct c4iw_dev *dev, struct sk_buff *skb)
3542 * Save dev in the skb->cb area.
3544 *((struct c4iw_dev **) (skb->cb + sizeof(void *))) = dev;
3547 * Queue the skb and schedule the worker thread.
3549 skb_queue_tail(&rxq, skb);
3550 queue_work(workq, &skb_work);
3554 static int set_tcb_rpl(struct c4iw_dev *dev, struct sk_buff *skb)
3556 struct cpl_set_tcb_rpl *rpl = cplhdr(skb);
3558 if (rpl->status != CPL_ERR_NONE) {
3559 printk(KERN_ERR MOD "Unexpected SET_TCB_RPL status %u "
3560 "for tid %u\n", rpl->status, GET_TID(rpl));
3566 static int fw6_msg(struct c4iw_dev *dev, struct sk_buff *skb)
3568 struct cpl_fw6_msg *rpl = cplhdr(skb);
3569 struct c4iw_wr_wait *wr_waitp;
3572 PDBG("%s type %u\n", __func__, rpl->type);
3574 switch (rpl->type) {
3575 case FW6_TYPE_WR_RPL:
3576 ret = (int)((be64_to_cpu(rpl->data[0]) >> 8) & 0xff);
3577 wr_waitp = (struct c4iw_wr_wait *)(__force unsigned long) rpl->data[1];
3578 PDBG("%s wr_waitp %p ret %u\n", __func__, wr_waitp, ret);
3580 c4iw_wake_up(wr_waitp, ret ? -ret : 0);
3584 case FW6_TYPE_OFLD_CONNECTION_WR_RPL:
3588 printk(KERN_ERR MOD "%s unexpected fw6 msg type %u\n", __func__,
3596 static int peer_abort_intr(struct c4iw_dev *dev, struct sk_buff *skb)
3598 struct cpl_abort_req_rss *req = cplhdr(skb);
3600 struct tid_info *t = dev->rdev.lldi.tids;
3601 unsigned int tid = GET_TID(req);
3603 ep = lookup_tid(t, tid);
3605 printk(KERN_WARNING MOD
3606 "Abort on non-existent endpoint, tid %d\n", tid);
3610 if (is_neg_adv_abort(req->status)) {
3611 PDBG("%s neg_adv_abort ep %p tid %u\n", __func__, ep,
3616 PDBG("%s ep %p tid %u state %u\n", __func__, ep, ep->hwtid,
3620 * Wake up any threads in rdma_init() or rdma_fini().
3621 * However, if we are on MPAv2 and want to retry with MPAv1
3622 * then, don't wake up yet.
3624 if (mpa_rev == 2 && !ep->tried_with_mpa_v1) {
3625 if (ep->com.state != MPA_REQ_SENT)
3626 c4iw_wake_up(&ep->com.wr_wait, -ECONNRESET);
3628 c4iw_wake_up(&ep->com.wr_wait, -ECONNRESET);
3634 * Most upcalls from the T4 Core go to sched() to
3635 * schedule the processing on a work queue.
3637 c4iw_handler_func c4iw_handlers[NUM_CPL_CMDS] = {
3638 [CPL_ACT_ESTABLISH] = sched,
3639 [CPL_ACT_OPEN_RPL] = sched,
3640 [CPL_RX_DATA] = sched,
3641 [CPL_ABORT_RPL_RSS] = sched,
3642 [CPL_ABORT_RPL] = sched,
3643 [CPL_PASS_OPEN_RPL] = sched,
3644 [CPL_CLOSE_LISTSRV_RPL] = sched,
3645 [CPL_PASS_ACCEPT_REQ] = sched,
3646 [CPL_PASS_ESTABLISH] = sched,
3647 [CPL_PEER_CLOSE] = sched,
3648 [CPL_CLOSE_CON_RPL] = sched,
3649 [CPL_ABORT_REQ_RSS] = peer_abort_intr,
3650 [CPL_RDMA_TERMINATE] = sched,
3651 [CPL_FW4_ACK] = sched,
3652 [CPL_SET_TCB_RPL] = set_tcb_rpl,
3653 [CPL_FW6_MSG] = fw6_msg,
3654 [CPL_RX_PKT] = sched
3657 int __init c4iw_cm_init(void)
3659 spin_lock_init(&timeout_lock);
3660 skb_queue_head_init(&rxq);
3662 workq = create_singlethread_workqueue("iw_cxgb4");
3669 void __exit c4iw_cm_term(void)
3671 WARN_ON(!list_empty(&timeout_list));
3672 flush_workqueue(workq);
3673 destroy_workqueue(workq);