2 * Copyright (c) 2009-2014 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>
50 #include <rdma/ib_addr.h>
55 static char *states[] = {
72 module_param(nocong, int, 0644);
73 MODULE_PARM_DESC(nocong, "Turn of congestion control (default=0)");
75 static int enable_ecn;
76 module_param(enable_ecn, int, 0644);
77 MODULE_PARM_DESC(enable_ecn, "Enable ECN (default=0/disabled)");
79 static int dack_mode = 1;
80 module_param(dack_mode, int, 0644);
81 MODULE_PARM_DESC(dack_mode, "Delayed ack mode (default=1)");
83 uint c4iw_max_read_depth = 32;
84 module_param(c4iw_max_read_depth, int, 0644);
85 MODULE_PARM_DESC(c4iw_max_read_depth,
86 "Per-connection max ORD/IRD (default=32)");
88 static int enable_tcp_timestamps;
89 module_param(enable_tcp_timestamps, int, 0644);
90 MODULE_PARM_DESC(enable_tcp_timestamps, "Enable tcp timestamps (default=0)");
92 static int enable_tcp_sack;
93 module_param(enable_tcp_sack, int, 0644);
94 MODULE_PARM_DESC(enable_tcp_sack, "Enable tcp SACK (default=0)");
96 static int enable_tcp_window_scaling = 1;
97 module_param(enable_tcp_window_scaling, int, 0644);
98 MODULE_PARM_DESC(enable_tcp_window_scaling,
99 "Enable tcp window scaling (default=1)");
102 module_param(c4iw_debug, int, 0644);
103 MODULE_PARM_DESC(c4iw_debug, "Enable debug logging (default=0)");
105 static int peer2peer = 1;
106 module_param(peer2peer, int, 0644);
107 MODULE_PARM_DESC(peer2peer, "Support peer2peer ULPs (default=1)");
109 static int p2p_type = FW_RI_INIT_P2PTYPE_READ_REQ;
110 module_param(p2p_type, int, 0644);
111 MODULE_PARM_DESC(p2p_type, "RDMAP opcode to use for the RTR message: "
112 "1=RDMA_READ 0=RDMA_WRITE (default 1)");
114 static int ep_timeout_secs = 60;
115 module_param(ep_timeout_secs, int, 0644);
116 MODULE_PARM_DESC(ep_timeout_secs, "CM Endpoint operation timeout "
117 "in seconds (default=60)");
119 static int mpa_rev = 2;
120 module_param(mpa_rev, int, 0644);
121 MODULE_PARM_DESC(mpa_rev, "MPA Revision, 0 supports amso1100, "
122 "1 is RFC5044 spec compliant, 2 is IETF MPA Peer Connect Draft"
123 " compliant (default=2)");
125 static int markers_enabled;
126 module_param(markers_enabled, int, 0644);
127 MODULE_PARM_DESC(markers_enabled, "Enable MPA MARKERS (default(0)=disabled)");
129 static int crc_enabled = 1;
130 module_param(crc_enabled, int, 0644);
131 MODULE_PARM_DESC(crc_enabled, "Enable MPA CRC (default(1)=enabled)");
133 static int rcv_win = 256 * 1024;
134 module_param(rcv_win, int, 0644);
135 MODULE_PARM_DESC(rcv_win, "TCP receive window in bytes (default=256KB)");
137 static int snd_win = 128 * 1024;
138 module_param(snd_win, int, 0644);
139 MODULE_PARM_DESC(snd_win, "TCP send window in bytes (default=128KB)");
141 static struct workqueue_struct *workq;
143 static struct sk_buff_head rxq;
145 static struct sk_buff *get_skb(struct sk_buff *skb, int len, gfp_t gfp);
146 static void ep_timeout(unsigned long arg);
147 static void connect_reply_upcall(struct c4iw_ep *ep, int status);
148 static int sched(struct c4iw_dev *dev, struct sk_buff *skb);
150 static LIST_HEAD(timeout_list);
151 static spinlock_t timeout_lock;
153 static void deref_cm_id(struct c4iw_ep_common *epc)
155 epc->cm_id->rem_ref(epc->cm_id);
157 set_bit(CM_ID_DEREFED, &epc->history);
160 static void ref_cm_id(struct c4iw_ep_common *epc)
162 set_bit(CM_ID_REFED, &epc->history);
163 epc->cm_id->add_ref(epc->cm_id);
166 static void deref_qp(struct c4iw_ep *ep)
168 c4iw_qp_rem_ref(&ep->com.qp->ibqp);
169 clear_bit(QP_REFERENCED, &ep->com.flags);
170 set_bit(QP_DEREFED, &ep->com.history);
173 static void ref_qp(struct c4iw_ep *ep)
175 set_bit(QP_REFERENCED, &ep->com.flags);
176 set_bit(QP_REFED, &ep->com.history);
177 c4iw_qp_add_ref(&ep->com.qp->ibqp);
180 static void start_ep_timer(struct c4iw_ep *ep)
182 PDBG("%s ep %p\n", __func__, ep);
183 if (timer_pending(&ep->timer)) {
184 pr_err("%s timer already started! ep %p\n",
188 clear_bit(TIMEOUT, &ep->com.flags);
189 c4iw_get_ep(&ep->com);
190 ep->timer.expires = jiffies + ep_timeout_secs * HZ;
191 ep->timer.data = (unsigned long)ep;
192 ep->timer.function = ep_timeout;
193 add_timer(&ep->timer);
196 static int stop_ep_timer(struct c4iw_ep *ep)
198 PDBG("%s ep %p stopping\n", __func__, ep);
199 del_timer_sync(&ep->timer);
200 if (!test_and_set_bit(TIMEOUT, &ep->com.flags)) {
201 c4iw_put_ep(&ep->com);
207 static int c4iw_l2t_send(struct c4iw_rdev *rdev, struct sk_buff *skb,
208 struct l2t_entry *l2e)
212 if (c4iw_fatal_error(rdev)) {
214 PDBG("%s - device in error state - dropping\n", __func__);
217 error = cxgb4_l2t_send(rdev->lldi.ports[0], skb, l2e);
220 else if (error == NET_XMIT_DROP)
222 return error < 0 ? error : 0;
225 int c4iw_ofld_send(struct c4iw_rdev *rdev, struct sk_buff *skb)
229 if (c4iw_fatal_error(rdev)) {
231 PDBG("%s - device in error state - dropping\n", __func__);
234 error = cxgb4_ofld_send(rdev->lldi.ports[0], skb);
237 return error < 0 ? error : 0;
240 static void release_tid(struct c4iw_rdev *rdev, u32 hwtid, struct sk_buff *skb)
242 struct cpl_tid_release *req;
244 skb = get_skb(skb, sizeof *req, GFP_KERNEL);
247 req = (struct cpl_tid_release *) skb_put(skb, sizeof(*req));
248 INIT_TP_WR(req, hwtid);
249 OPCODE_TID(req) = cpu_to_be32(MK_OPCODE_TID(CPL_TID_RELEASE, hwtid));
250 set_wr_txq(skb, CPL_PRIORITY_SETUP, 0);
251 c4iw_ofld_send(rdev, skb);
255 static void set_emss(struct c4iw_ep *ep, u16 opt)
257 ep->emss = ep->com.dev->rdev.lldi.mtus[TCPOPT_MSS_G(opt)] -
258 ((AF_INET == ep->com.remote_addr.ss_family) ?
259 sizeof(struct iphdr) : sizeof(struct ipv6hdr)) -
260 sizeof(struct tcphdr);
262 if (TCPOPT_TSTAMP_G(opt))
263 ep->emss -= round_up(TCPOLEN_TIMESTAMP, 4);
267 PDBG("Warning: misaligned mtu idx %u mss %u emss=%u\n",
268 TCPOPT_MSS_G(opt), ep->mss, ep->emss);
269 PDBG("%s mss_idx %u mss %u emss=%u\n", __func__, TCPOPT_MSS_G(opt),
273 static enum c4iw_ep_state state_read(struct c4iw_ep_common *epc)
275 enum c4iw_ep_state state;
277 mutex_lock(&epc->mutex);
279 mutex_unlock(&epc->mutex);
283 static void __state_set(struct c4iw_ep_common *epc, enum c4iw_ep_state new)
288 static void state_set(struct c4iw_ep_common *epc, enum c4iw_ep_state new)
290 mutex_lock(&epc->mutex);
291 PDBG("%s - %s -> %s\n", __func__, states[epc->state], states[new]);
292 __state_set(epc, new);
293 mutex_unlock(&epc->mutex);
297 static void *alloc_ep(int size, gfp_t gfp)
299 struct c4iw_ep_common *epc;
301 epc = kzalloc(size, gfp);
303 kref_init(&epc->kref);
304 mutex_init(&epc->mutex);
305 c4iw_init_wr_wait(&epc->wr_wait);
307 PDBG("%s alloc ep %p\n", __func__, epc);
311 void _c4iw_free_ep(struct kref *kref)
315 ep = container_of(kref, struct c4iw_ep, com.kref);
316 PDBG("%s ep %p state %s\n", __func__, ep, states[ep->com.state]);
317 if (test_bit(QP_REFERENCED, &ep->com.flags))
319 if (test_bit(RELEASE_RESOURCES, &ep->com.flags)) {
320 if (ep->com.remote_addr.ss_family == AF_INET6) {
321 struct sockaddr_in6 *sin6 =
322 (struct sockaddr_in6 *)
326 ep->com.dev->rdev.lldi.ports[0],
327 (const u32 *)&sin6->sin6_addr.s6_addr,
330 remove_handle(ep->com.dev, &ep->com.dev->hwtid_idr, ep->hwtid);
331 cxgb4_remove_tid(ep->com.dev->rdev.lldi.tids, 0, ep->hwtid);
332 dst_release(ep->dst);
333 cxgb4_l2t_release(ep->l2t);
338 static void release_ep_resources(struct c4iw_ep *ep)
340 set_bit(RELEASE_RESOURCES, &ep->com.flags);
341 c4iw_put_ep(&ep->com);
344 static int status2errno(int status)
349 case CPL_ERR_CONN_RESET:
351 case CPL_ERR_ARP_MISS:
352 return -EHOSTUNREACH;
353 case CPL_ERR_CONN_TIMEDOUT:
355 case CPL_ERR_TCAM_FULL:
357 case CPL_ERR_CONN_EXIST:
365 * Try and reuse skbs already allocated...
367 static struct sk_buff *get_skb(struct sk_buff *skb, int len, gfp_t gfp)
369 if (skb && !skb_is_nonlinear(skb) && !skb_cloned(skb)) {
372 skb_reset_transport_header(skb);
374 skb = alloc_skb(len, gfp);
376 t4_set_arp_err_handler(skb, NULL, NULL);
380 static struct net_device *get_real_dev(struct net_device *egress_dev)
382 return rdma_vlan_dev_real_dev(egress_dev) ? : egress_dev;
385 static int our_interface(struct c4iw_dev *dev, struct net_device *egress_dev)
389 egress_dev = get_real_dev(egress_dev);
390 for (i = 0; i < dev->rdev.lldi.nports; i++)
391 if (dev->rdev.lldi.ports[i] == egress_dev)
396 static struct dst_entry *find_route6(struct c4iw_dev *dev, __u8 *local_ip,
397 __u8 *peer_ip, __be16 local_port,
398 __be16 peer_port, u8 tos,
401 struct dst_entry *dst = NULL;
403 if (IS_ENABLED(CONFIG_IPV6)) {
406 memset(&fl6, 0, sizeof(fl6));
407 memcpy(&fl6.daddr, peer_ip, 16);
408 memcpy(&fl6.saddr, local_ip, 16);
409 if (ipv6_addr_type(&fl6.daddr) & IPV6_ADDR_LINKLOCAL)
410 fl6.flowi6_oif = sin6_scope_id;
411 dst = ip6_route_output(&init_net, NULL, &fl6);
414 if (!our_interface(dev, ip6_dst_idev(dst)->dev) &&
415 !(ip6_dst_idev(dst)->dev->flags & IFF_LOOPBACK)) {
425 static struct dst_entry *find_route(struct c4iw_dev *dev, __be32 local_ip,
426 __be32 peer_ip, __be16 local_port,
427 __be16 peer_port, u8 tos)
433 rt = ip_route_output_ports(&init_net, &fl4, NULL, peer_ip, local_ip,
434 peer_port, local_port, IPPROTO_TCP,
438 n = dst_neigh_lookup(&rt->dst, &peer_ip);
441 if (!our_interface(dev, n->dev) &&
442 !(n->dev->flags & IFF_LOOPBACK)) {
444 dst_release(&rt->dst);
451 static void arp_failure_discard(void *handle, struct sk_buff *skb)
453 pr_err(MOD "ARP failure\n");
459 FAKE_CPL_PUT_EP_SAFE = NUM_CPL_CMDS + 0,
460 FAKE_CPL_PASS_PUT_EP_SAFE = NUM_CPL_CMDS + 1,
463 static int _put_ep_safe(struct c4iw_dev *dev, struct sk_buff *skb)
467 ep = *((struct c4iw_ep **)(skb->cb + 2 * sizeof(void *)));
468 release_ep_resources(ep);
472 static int _put_pass_ep_safe(struct c4iw_dev *dev, struct sk_buff *skb)
476 ep = *((struct c4iw_ep **)(skb->cb + 2 * sizeof(void *)));
477 c4iw_put_ep(&ep->parent_ep->com);
478 release_ep_resources(ep);
483 * Fake up a special CPL opcode and call sched() so process_work() will call
484 * _put_ep_safe() in a safe context to free the ep resources. This is needed
485 * because ARP error handlers are called in an ATOMIC context, and
486 * _c4iw_free_ep() needs to block.
488 static void queue_arp_failure_cpl(struct c4iw_ep *ep, struct sk_buff *skb,
491 struct cpl_act_establish *rpl = cplhdr(skb);
493 /* Set our special ARP_FAILURE opcode */
494 rpl->ot.opcode = cpl;
497 * Save ep in the skb->cb area, after where sched() will save the dev
500 *((struct c4iw_ep **)(skb->cb + 2 * sizeof(void *))) = ep;
501 sched(ep->com.dev, skb);
504 /* Handle an ARP failure for an accept */
505 static void pass_accept_rpl_arp_failure(void *handle, struct sk_buff *skb)
507 struct c4iw_ep *ep = handle;
509 pr_err(MOD "ARP failure during accept - tid %u -dropping connection\n",
512 __state_set(&ep->com, DEAD);
513 queue_arp_failure_cpl(ep, skb, FAKE_CPL_PASS_PUT_EP_SAFE);
517 * Handle an ARP failure for an active open.
519 static void act_open_req_arp_failure(void *handle, struct sk_buff *skb)
521 struct c4iw_ep *ep = handle;
523 printk(KERN_ERR MOD "ARP failure during connect\n");
524 connect_reply_upcall(ep, -EHOSTUNREACH);
525 __state_set(&ep->com, DEAD);
526 if (ep->com.remote_addr.ss_family == AF_INET6) {
527 struct sockaddr_in6 *sin6 =
528 (struct sockaddr_in6 *)&ep->com.local_addr;
529 cxgb4_clip_release(ep->com.dev->rdev.lldi.ports[0],
530 (const u32 *)&sin6->sin6_addr.s6_addr, 1);
532 remove_handle(ep->com.dev, &ep->com.dev->atid_idr, ep->atid);
533 cxgb4_free_atid(ep->com.dev->rdev.lldi.tids, ep->atid);
534 queue_arp_failure_cpl(ep, skb, FAKE_CPL_PUT_EP_SAFE);
538 * Handle an ARP failure for a CPL_ABORT_REQ. Change it into a no RST variant
541 static void abort_arp_failure(void *handle, struct sk_buff *skb)
544 struct c4iw_ep *ep = handle;
545 struct c4iw_rdev *rdev = &ep->com.dev->rdev;
546 struct cpl_abort_req *req = cplhdr(skb);
548 PDBG("%s rdev %p\n", __func__, rdev);
549 req->cmd = CPL_ABORT_NO_RST;
550 ret = c4iw_ofld_send(rdev, skb);
552 __state_set(&ep->com, DEAD);
553 queue_arp_failure_cpl(ep, skb, FAKE_CPL_PUT_EP_SAFE);
557 static int send_flowc(struct c4iw_ep *ep, struct sk_buff *skb)
559 unsigned int flowclen = 80;
560 struct fw_flowc_wr *flowc;
562 u16 vlan = ep->l2t->vlan;
565 if (vlan == CPL_L2T_VLAN_NONE)
570 skb = get_skb(skb, flowclen, GFP_KERNEL);
571 flowc = (struct fw_flowc_wr *)__skb_put(skb, flowclen);
573 flowc->op_to_nparams = cpu_to_be32(FW_WR_OP_V(FW_FLOWC_WR) |
574 FW_FLOWC_WR_NPARAMS_V(nparams));
575 flowc->flowid_len16 = cpu_to_be32(FW_WR_LEN16_V(DIV_ROUND_UP(flowclen,
576 16)) | FW_WR_FLOWID_V(ep->hwtid));
578 flowc->mnemval[0].mnemonic = FW_FLOWC_MNEM_PFNVFN;
579 flowc->mnemval[0].val = cpu_to_be32(FW_PFVF_CMD_PFN_V
580 (ep->com.dev->rdev.lldi.pf));
581 flowc->mnemval[1].mnemonic = FW_FLOWC_MNEM_CH;
582 flowc->mnemval[1].val = cpu_to_be32(ep->tx_chan);
583 flowc->mnemval[2].mnemonic = FW_FLOWC_MNEM_PORT;
584 flowc->mnemval[2].val = cpu_to_be32(ep->tx_chan);
585 flowc->mnemval[3].mnemonic = FW_FLOWC_MNEM_IQID;
586 flowc->mnemval[3].val = cpu_to_be32(ep->rss_qid);
587 flowc->mnemval[4].mnemonic = FW_FLOWC_MNEM_SNDNXT;
588 flowc->mnemval[4].val = cpu_to_be32(ep->snd_seq);
589 flowc->mnemval[5].mnemonic = FW_FLOWC_MNEM_RCVNXT;
590 flowc->mnemval[5].val = cpu_to_be32(ep->rcv_seq);
591 flowc->mnemval[6].mnemonic = FW_FLOWC_MNEM_SNDBUF;
592 flowc->mnemval[6].val = cpu_to_be32(ep->snd_win);
593 flowc->mnemval[7].mnemonic = FW_FLOWC_MNEM_MSS;
594 flowc->mnemval[7].val = cpu_to_be32(ep->emss);
598 pri = (vlan & VLAN_PRIO_MASK) >> VLAN_PRIO_SHIFT;
599 flowc->mnemval[8].mnemonic = FW_FLOWC_MNEM_SCHEDCLASS;
600 flowc->mnemval[8].val = cpu_to_be32(pri);
602 /* Pad WR to 16 byte boundary */
603 flowc->mnemval[8].mnemonic = 0;
604 flowc->mnemval[8].val = 0;
606 for (i = 0; i < 9; i++) {
607 flowc->mnemval[i].r4[0] = 0;
608 flowc->mnemval[i].r4[1] = 0;
609 flowc->mnemval[i].r4[2] = 0;
612 set_wr_txq(skb, CPL_PRIORITY_DATA, ep->txq_idx);
613 return c4iw_ofld_send(&ep->com.dev->rdev, skb);
616 static int send_halfclose(struct c4iw_ep *ep, gfp_t gfp)
618 struct cpl_close_con_req *req;
620 int wrlen = roundup(sizeof *req, 16);
622 PDBG("%s ep %p tid %u\n", __func__, ep, ep->hwtid);
623 skb = get_skb(NULL, wrlen, gfp);
625 printk(KERN_ERR MOD "%s - failed to alloc skb\n", __func__);
628 set_wr_txq(skb, CPL_PRIORITY_DATA, ep->txq_idx);
629 t4_set_arp_err_handler(skb, NULL, arp_failure_discard);
630 req = (struct cpl_close_con_req *) skb_put(skb, wrlen);
631 memset(req, 0, wrlen);
632 INIT_TP_WR(req, ep->hwtid);
633 OPCODE_TID(req) = cpu_to_be32(MK_OPCODE_TID(CPL_CLOSE_CON_REQ,
635 return c4iw_l2t_send(&ep->com.dev->rdev, skb, ep->l2t);
638 static int send_abort(struct c4iw_ep *ep, struct sk_buff *skb, gfp_t gfp)
640 struct cpl_abort_req *req;
641 int wrlen = roundup(sizeof *req, 16);
643 PDBG("%s ep %p tid %u\n", __func__, ep, ep->hwtid);
644 skb = get_skb(skb, wrlen, gfp);
646 printk(KERN_ERR MOD "%s - failed to alloc skb.\n",
650 set_wr_txq(skb, CPL_PRIORITY_DATA, ep->txq_idx);
651 t4_set_arp_err_handler(skb, ep, abort_arp_failure);
652 req = (struct cpl_abort_req *) skb_put(skb, wrlen);
653 memset(req, 0, wrlen);
654 INIT_TP_WR(req, ep->hwtid);
655 OPCODE_TID(req) = cpu_to_be32(MK_OPCODE_TID(CPL_ABORT_REQ, ep->hwtid));
656 req->cmd = CPL_ABORT_SEND_RST;
657 return c4iw_l2t_send(&ep->com.dev->rdev, skb, ep->l2t);
660 static void best_mtu(const unsigned short *mtus, unsigned short mtu,
661 unsigned int *idx, int use_ts, int ipv6)
663 unsigned short hdr_size = (ipv6 ?
664 sizeof(struct ipv6hdr) :
665 sizeof(struct iphdr)) +
666 sizeof(struct tcphdr) +
668 round_up(TCPOLEN_TIMESTAMP, 4) : 0);
669 unsigned short data_size = mtu - hdr_size;
671 cxgb4_best_aligned_mtu(mtus, hdr_size, data_size, 8, idx);
674 static int send_connect(struct c4iw_ep *ep)
676 struct cpl_act_open_req *req = NULL;
677 struct cpl_t5_act_open_req *t5req = NULL;
678 struct cpl_t6_act_open_req *t6req = NULL;
679 struct cpl_act_open_req6 *req6 = NULL;
680 struct cpl_t5_act_open_req6 *t5req6 = NULL;
681 struct cpl_t6_act_open_req6 *t6req6 = NULL;
685 unsigned int mtu_idx;
687 int win, sizev4, sizev6, wrlen;
688 struct sockaddr_in *la = (struct sockaddr_in *)
690 struct sockaddr_in *ra = (struct sockaddr_in *)
691 &ep->com.remote_addr;
692 struct sockaddr_in6 *la6 = (struct sockaddr_in6 *)
694 struct sockaddr_in6 *ra6 = (struct sockaddr_in6 *)
695 &ep->com.remote_addr;
697 enum chip_type adapter_type = ep->com.dev->rdev.lldi.adapter_type;
698 u32 isn = (prandom_u32() & ~7UL) - 1;
700 switch (CHELSIO_CHIP_VERSION(adapter_type)) {
702 sizev4 = sizeof(struct cpl_act_open_req);
703 sizev6 = sizeof(struct cpl_act_open_req6);
706 sizev4 = sizeof(struct cpl_t5_act_open_req);
707 sizev6 = sizeof(struct cpl_t5_act_open_req6);
710 sizev4 = sizeof(struct cpl_t6_act_open_req);
711 sizev6 = sizeof(struct cpl_t6_act_open_req6);
714 pr_err("T%d Chip is not supported\n",
715 CHELSIO_CHIP_VERSION(adapter_type));
719 wrlen = (ep->com.remote_addr.ss_family == AF_INET) ?
720 roundup(sizev4, 16) :
723 PDBG("%s ep %p atid %u\n", __func__, ep, ep->atid);
725 skb = get_skb(NULL, wrlen, GFP_KERNEL);
727 printk(KERN_ERR MOD "%s - failed to alloc skb.\n",
731 set_wr_txq(skb, CPL_PRIORITY_SETUP, ep->ctrlq_idx);
733 best_mtu(ep->com.dev->rdev.lldi.mtus, ep->mtu, &mtu_idx,
734 enable_tcp_timestamps,
735 (AF_INET == ep->com.remote_addr.ss_family) ? 0 : 1);
736 wscale = compute_wscale(rcv_win);
739 * Specify the largest window that will fit in opt0. The
740 * remainder will be specified in the rx_data_ack.
742 win = ep->rcv_win >> 10;
743 if (win > RCV_BUFSIZ_M)
746 opt0 = (nocong ? NO_CONG_F : 0) |
749 WND_SCALE_V(wscale) |
751 L2T_IDX_V(ep->l2t->idx) |
752 TX_CHAN_V(ep->tx_chan) |
753 SMAC_SEL_V(ep->smac_idx) |
754 DSCP_V(ep->tos >> 2) |
755 ULP_MODE_V(ULP_MODE_TCPDDP) |
757 opt2 = RX_CHANNEL_V(0) |
758 CCTRL_ECN_V(enable_ecn) |
759 RSS_QUEUE_VALID_F | RSS_QUEUE_V(ep->rss_qid);
760 if (enable_tcp_timestamps)
761 opt2 |= TSTAMPS_EN_F;
764 if (wscale && enable_tcp_window_scaling)
765 opt2 |= WND_SCALE_EN_F;
766 if (CHELSIO_CHIP_VERSION(adapter_type) > CHELSIO_T4) {
770 opt2 |= T5_OPT_2_VALID_F;
771 opt2 |= CONG_CNTRL_V(CONG_ALG_TAHOE);
775 if (ep->com.remote_addr.ss_family == AF_INET6)
776 cxgb4_clip_get(ep->com.dev->rdev.lldi.ports[0],
777 (const u32 *)&la6->sin6_addr.s6_addr, 1);
779 t4_set_arp_err_handler(skb, ep, act_open_req_arp_failure);
781 if (ep->com.remote_addr.ss_family == AF_INET) {
782 switch (CHELSIO_CHIP_VERSION(adapter_type)) {
784 req = (struct cpl_act_open_req *)skb_put(skb, wrlen);
788 t5req = (struct cpl_t5_act_open_req *)skb_put(skb,
790 INIT_TP_WR(t5req, 0);
791 req = (struct cpl_act_open_req *)t5req;
794 t6req = (struct cpl_t6_act_open_req *)skb_put(skb,
796 INIT_TP_WR(t6req, 0);
797 req = (struct cpl_act_open_req *)t6req;
798 t5req = (struct cpl_t5_act_open_req *)t6req;
801 pr_err("T%d Chip is not supported\n",
802 CHELSIO_CHIP_VERSION(adapter_type));
807 OPCODE_TID(req) = cpu_to_be32(MK_OPCODE_TID(CPL_ACT_OPEN_REQ,
808 ((ep->rss_qid<<14) | ep->atid)));
809 req->local_port = la->sin_port;
810 req->peer_port = ra->sin_port;
811 req->local_ip = la->sin_addr.s_addr;
812 req->peer_ip = ra->sin_addr.s_addr;
813 req->opt0 = cpu_to_be64(opt0);
815 if (is_t4(ep->com.dev->rdev.lldi.adapter_type)) {
816 req->params = cpu_to_be32(cxgb4_select_ntuple(
817 ep->com.dev->rdev.lldi.ports[0],
819 req->opt2 = cpu_to_be32(opt2);
821 t5req->params = cpu_to_be64(FILTER_TUPLE_V(
823 ep->com.dev->rdev.lldi.ports[0],
825 t5req->rsvd = cpu_to_be32(isn);
826 PDBG("%s snd_isn %u\n", __func__, t5req->rsvd);
827 t5req->opt2 = cpu_to_be32(opt2);
830 switch (CHELSIO_CHIP_VERSION(adapter_type)) {
832 req6 = (struct cpl_act_open_req6 *)skb_put(skb, wrlen);
836 t5req6 = (struct cpl_t5_act_open_req6 *)skb_put(skb,
838 INIT_TP_WR(t5req6, 0);
839 req6 = (struct cpl_act_open_req6 *)t5req6;
842 t6req6 = (struct cpl_t6_act_open_req6 *)skb_put(skb,
844 INIT_TP_WR(t6req6, 0);
845 req6 = (struct cpl_act_open_req6 *)t6req6;
846 t5req6 = (struct cpl_t5_act_open_req6 *)t6req6;
849 pr_err("T%d Chip is not supported\n",
850 CHELSIO_CHIP_VERSION(adapter_type));
855 OPCODE_TID(req6) = cpu_to_be32(MK_OPCODE_TID(CPL_ACT_OPEN_REQ6,
856 ((ep->rss_qid<<14)|ep->atid)));
857 req6->local_port = la6->sin6_port;
858 req6->peer_port = ra6->sin6_port;
859 req6->local_ip_hi = *((__be64 *)(la6->sin6_addr.s6_addr));
860 req6->local_ip_lo = *((__be64 *)(la6->sin6_addr.s6_addr + 8));
861 req6->peer_ip_hi = *((__be64 *)(ra6->sin6_addr.s6_addr));
862 req6->peer_ip_lo = *((__be64 *)(ra6->sin6_addr.s6_addr + 8));
863 req6->opt0 = cpu_to_be64(opt0);
865 if (is_t4(ep->com.dev->rdev.lldi.adapter_type)) {
866 req6->params = cpu_to_be32(cxgb4_select_ntuple(
867 ep->com.dev->rdev.lldi.ports[0],
869 req6->opt2 = cpu_to_be32(opt2);
871 t5req6->params = cpu_to_be64(FILTER_TUPLE_V(
873 ep->com.dev->rdev.lldi.ports[0],
875 t5req6->rsvd = cpu_to_be32(isn);
876 PDBG("%s snd_isn %u\n", __func__, t5req6->rsvd);
877 t5req6->opt2 = cpu_to_be32(opt2);
881 set_bit(ACT_OPEN_REQ, &ep->com.history);
882 ret = c4iw_l2t_send(&ep->com.dev->rdev, skb, ep->l2t);
884 if (ret && ep->com.remote_addr.ss_family == AF_INET6)
885 cxgb4_clip_release(ep->com.dev->rdev.lldi.ports[0],
886 (const u32 *)&la6->sin6_addr.s6_addr, 1);
890 static int send_mpa_req(struct c4iw_ep *ep, struct sk_buff *skb,
893 int mpalen, wrlen, ret;
894 struct fw_ofld_tx_data_wr *req;
895 struct mpa_message *mpa;
896 struct mpa_v2_conn_params mpa_v2_params;
898 PDBG("%s ep %p tid %u pd_len %d\n", __func__, ep, ep->hwtid, ep->plen);
900 BUG_ON(skb_cloned(skb));
902 mpalen = sizeof(*mpa) + ep->plen;
903 if (mpa_rev_to_use == 2)
904 mpalen += sizeof(struct mpa_v2_conn_params);
905 wrlen = roundup(mpalen + sizeof *req, 16);
906 skb = get_skb(skb, wrlen, GFP_KERNEL);
908 connect_reply_upcall(ep, -ENOMEM);
911 set_wr_txq(skb, CPL_PRIORITY_DATA, ep->txq_idx);
913 req = (struct fw_ofld_tx_data_wr *)skb_put(skb, wrlen);
914 memset(req, 0, wrlen);
915 req->op_to_immdlen = cpu_to_be32(
916 FW_WR_OP_V(FW_OFLD_TX_DATA_WR) |
918 FW_WR_IMMDLEN_V(mpalen));
919 req->flowid_len16 = cpu_to_be32(
920 FW_WR_FLOWID_V(ep->hwtid) |
921 FW_WR_LEN16_V(wrlen >> 4));
922 req->plen = cpu_to_be32(mpalen);
923 req->tunnel_to_proxy = cpu_to_be32(
924 FW_OFLD_TX_DATA_WR_FLUSH_F |
925 FW_OFLD_TX_DATA_WR_SHOVE_F);
927 mpa = (struct mpa_message *)(req + 1);
928 memcpy(mpa->key, MPA_KEY_REQ, sizeof(mpa->key));
929 mpa->flags = (crc_enabled ? MPA_CRC : 0) |
930 (markers_enabled ? MPA_MARKERS : 0) |
931 (mpa_rev_to_use == 2 ? MPA_ENHANCED_RDMA_CONN : 0);
932 mpa->private_data_size = htons(ep->plen);
933 mpa->revision = mpa_rev_to_use;
934 if (mpa_rev_to_use == 1) {
935 ep->tried_with_mpa_v1 = 1;
936 ep->retry_with_mpa_v1 = 0;
939 if (mpa_rev_to_use == 2) {
940 mpa->private_data_size = htons(ntohs(mpa->private_data_size) +
941 sizeof (struct mpa_v2_conn_params));
942 PDBG("%s initiator ird %u ord %u\n", __func__, ep->ird,
944 mpa_v2_params.ird = htons((u16)ep->ird);
945 mpa_v2_params.ord = htons((u16)ep->ord);
948 mpa_v2_params.ird |= htons(MPA_V2_PEER2PEER_MODEL);
949 if (p2p_type == FW_RI_INIT_P2PTYPE_RDMA_WRITE)
951 htons(MPA_V2_RDMA_WRITE_RTR);
952 else if (p2p_type == FW_RI_INIT_P2PTYPE_READ_REQ)
954 htons(MPA_V2_RDMA_READ_RTR);
956 memcpy(mpa->private_data, &mpa_v2_params,
957 sizeof(struct mpa_v2_conn_params));
960 memcpy(mpa->private_data +
961 sizeof(struct mpa_v2_conn_params),
962 ep->mpa_pkt + sizeof(*mpa), ep->plen);
965 memcpy(mpa->private_data,
966 ep->mpa_pkt + sizeof(*mpa), ep->plen);
969 * Reference the mpa skb. This ensures the data area
970 * will remain in memory until the hw acks the tx.
971 * Function fw4_ack() will deref it.
974 t4_set_arp_err_handler(skb, NULL, arp_failure_discard);
977 ret = c4iw_l2t_send(&ep->com.dev->rdev, skb, ep->l2t);
981 __state_set(&ep->com, MPA_REQ_SENT);
982 ep->mpa_attr.initiator = 1;
983 ep->snd_seq += mpalen;
987 static int send_mpa_reject(struct c4iw_ep *ep, const void *pdata, u8 plen)
990 struct fw_ofld_tx_data_wr *req;
991 struct mpa_message *mpa;
993 struct mpa_v2_conn_params mpa_v2_params;
995 PDBG("%s ep %p tid %u pd_len %d\n", __func__, ep, ep->hwtid, ep->plen);
997 mpalen = sizeof(*mpa) + plen;
998 if (ep->mpa_attr.version == 2 && ep->mpa_attr.enhanced_rdma_conn)
999 mpalen += sizeof(struct mpa_v2_conn_params);
1000 wrlen = roundup(mpalen + sizeof *req, 16);
1002 skb = get_skb(NULL, wrlen, GFP_KERNEL);
1004 printk(KERN_ERR MOD "%s - cannot alloc skb!\n", __func__);
1007 set_wr_txq(skb, CPL_PRIORITY_DATA, ep->txq_idx);
1009 req = (struct fw_ofld_tx_data_wr *)skb_put(skb, wrlen);
1010 memset(req, 0, wrlen);
1011 req->op_to_immdlen = cpu_to_be32(
1012 FW_WR_OP_V(FW_OFLD_TX_DATA_WR) |
1014 FW_WR_IMMDLEN_V(mpalen));
1015 req->flowid_len16 = cpu_to_be32(
1016 FW_WR_FLOWID_V(ep->hwtid) |
1017 FW_WR_LEN16_V(wrlen >> 4));
1018 req->plen = cpu_to_be32(mpalen);
1019 req->tunnel_to_proxy = cpu_to_be32(
1020 FW_OFLD_TX_DATA_WR_FLUSH_F |
1021 FW_OFLD_TX_DATA_WR_SHOVE_F);
1023 mpa = (struct mpa_message *)(req + 1);
1024 memset(mpa, 0, sizeof(*mpa));
1025 memcpy(mpa->key, MPA_KEY_REP, sizeof(mpa->key));
1026 mpa->flags = MPA_REJECT;
1027 mpa->revision = ep->mpa_attr.version;
1028 mpa->private_data_size = htons(plen);
1030 if (ep->mpa_attr.version == 2 && ep->mpa_attr.enhanced_rdma_conn) {
1031 mpa->flags |= MPA_ENHANCED_RDMA_CONN;
1032 mpa->private_data_size = htons(ntohs(mpa->private_data_size) +
1033 sizeof (struct mpa_v2_conn_params));
1034 mpa_v2_params.ird = htons(((u16)ep->ird) |
1035 (peer2peer ? MPA_V2_PEER2PEER_MODEL :
1037 mpa_v2_params.ord = htons(((u16)ep->ord) | (peer2peer ?
1039 FW_RI_INIT_P2PTYPE_RDMA_WRITE ?
1040 MPA_V2_RDMA_WRITE_RTR : p2p_type ==
1041 FW_RI_INIT_P2PTYPE_READ_REQ ?
1042 MPA_V2_RDMA_READ_RTR : 0) : 0));
1043 memcpy(mpa->private_data, &mpa_v2_params,
1044 sizeof(struct mpa_v2_conn_params));
1047 memcpy(mpa->private_data +
1048 sizeof(struct mpa_v2_conn_params), pdata, plen);
1051 memcpy(mpa->private_data, pdata, plen);
1054 * Reference the mpa skb again. This ensures the data area
1055 * will remain in memory until the hw acks the tx.
1056 * Function fw4_ack() will deref it.
1059 set_wr_txq(skb, CPL_PRIORITY_DATA, ep->txq_idx);
1060 BUG_ON(ep->mpa_skb);
1062 ep->snd_seq += mpalen;
1063 return c4iw_l2t_send(&ep->com.dev->rdev, skb, ep->l2t);
1066 static int send_mpa_reply(struct c4iw_ep *ep, const void *pdata, u8 plen)
1069 struct fw_ofld_tx_data_wr *req;
1070 struct mpa_message *mpa;
1071 struct sk_buff *skb;
1072 struct mpa_v2_conn_params mpa_v2_params;
1074 PDBG("%s ep %p tid %u pd_len %d\n", __func__, ep, ep->hwtid, ep->plen);
1076 mpalen = sizeof(*mpa) + plen;
1077 if (ep->mpa_attr.version == 2 && ep->mpa_attr.enhanced_rdma_conn)
1078 mpalen += sizeof(struct mpa_v2_conn_params);
1079 wrlen = roundup(mpalen + sizeof *req, 16);
1081 skb = get_skb(NULL, wrlen, GFP_KERNEL);
1083 printk(KERN_ERR MOD "%s - cannot alloc skb!\n", __func__);
1086 set_wr_txq(skb, CPL_PRIORITY_DATA, ep->txq_idx);
1088 req = (struct fw_ofld_tx_data_wr *) skb_put(skb, wrlen);
1089 memset(req, 0, wrlen);
1090 req->op_to_immdlen = cpu_to_be32(
1091 FW_WR_OP_V(FW_OFLD_TX_DATA_WR) |
1093 FW_WR_IMMDLEN_V(mpalen));
1094 req->flowid_len16 = cpu_to_be32(
1095 FW_WR_FLOWID_V(ep->hwtid) |
1096 FW_WR_LEN16_V(wrlen >> 4));
1097 req->plen = cpu_to_be32(mpalen);
1098 req->tunnel_to_proxy = cpu_to_be32(
1099 FW_OFLD_TX_DATA_WR_FLUSH_F |
1100 FW_OFLD_TX_DATA_WR_SHOVE_F);
1102 mpa = (struct mpa_message *)(req + 1);
1103 memset(mpa, 0, sizeof(*mpa));
1104 memcpy(mpa->key, MPA_KEY_REP, sizeof(mpa->key));
1105 mpa->flags = (ep->mpa_attr.crc_enabled ? MPA_CRC : 0) |
1106 (markers_enabled ? MPA_MARKERS : 0);
1107 mpa->revision = ep->mpa_attr.version;
1108 mpa->private_data_size = htons(plen);
1110 if (ep->mpa_attr.version == 2 && ep->mpa_attr.enhanced_rdma_conn) {
1111 mpa->flags |= MPA_ENHANCED_RDMA_CONN;
1112 mpa->private_data_size = htons(ntohs(mpa->private_data_size) +
1113 sizeof (struct mpa_v2_conn_params));
1114 mpa_v2_params.ird = htons((u16)ep->ird);
1115 mpa_v2_params.ord = htons((u16)ep->ord);
1116 if (peer2peer && (ep->mpa_attr.p2p_type !=
1117 FW_RI_INIT_P2PTYPE_DISABLED)) {
1118 mpa_v2_params.ird |= htons(MPA_V2_PEER2PEER_MODEL);
1120 if (p2p_type == FW_RI_INIT_P2PTYPE_RDMA_WRITE)
1121 mpa_v2_params.ord |=
1122 htons(MPA_V2_RDMA_WRITE_RTR);
1123 else if (p2p_type == FW_RI_INIT_P2PTYPE_READ_REQ)
1124 mpa_v2_params.ord |=
1125 htons(MPA_V2_RDMA_READ_RTR);
1128 memcpy(mpa->private_data, &mpa_v2_params,
1129 sizeof(struct mpa_v2_conn_params));
1132 memcpy(mpa->private_data +
1133 sizeof(struct mpa_v2_conn_params), pdata, plen);
1136 memcpy(mpa->private_data, pdata, plen);
1139 * Reference the mpa skb. This ensures the data area
1140 * will remain in memory until the hw acks the tx.
1141 * Function fw4_ack() will deref it.
1145 __state_set(&ep->com, MPA_REP_SENT);
1146 ep->snd_seq += mpalen;
1147 return c4iw_l2t_send(&ep->com.dev->rdev, skb, ep->l2t);
1150 static int act_establish(struct c4iw_dev *dev, struct sk_buff *skb)
1153 struct cpl_act_establish *req = cplhdr(skb);
1154 unsigned int tid = GET_TID(req);
1155 unsigned int atid = TID_TID_G(ntohl(req->tos_atid));
1156 struct tid_info *t = dev->rdev.lldi.tids;
1159 ep = lookup_atid(t, atid);
1161 PDBG("%s ep %p tid %u snd_isn %u rcv_isn %u\n", __func__, ep, tid,
1162 be32_to_cpu(req->snd_isn), be32_to_cpu(req->rcv_isn));
1164 mutex_lock(&ep->com.mutex);
1165 dst_confirm(ep->dst);
1167 /* setup the hwtid for this connection */
1169 cxgb4_insert_tid(t, ep, tid);
1170 insert_handle(dev, &dev->hwtid_idr, ep, ep->hwtid);
1172 ep->snd_seq = be32_to_cpu(req->snd_isn);
1173 ep->rcv_seq = be32_to_cpu(req->rcv_isn);
1175 set_emss(ep, ntohs(req->tcp_opt));
1177 /* dealloc the atid */
1178 remove_handle(ep->com.dev, &ep->com.dev->atid_idr, atid);
1179 cxgb4_free_atid(t, atid);
1180 set_bit(ACT_ESTAB, &ep->com.history);
1182 /* start MPA negotiation */
1183 ret = send_flowc(ep, NULL);
1186 if (ep->retry_with_mpa_v1)
1187 ret = send_mpa_req(ep, skb, 1);
1189 ret = send_mpa_req(ep, skb, mpa_rev);
1192 mutex_unlock(&ep->com.mutex);
1195 mutex_unlock(&ep->com.mutex);
1196 connect_reply_upcall(ep, -ENOMEM);
1197 c4iw_ep_disconnect(ep, 0, GFP_KERNEL);
1201 static void close_complete_upcall(struct c4iw_ep *ep, int status)
1203 struct iw_cm_event event;
1205 PDBG("%s ep %p tid %u\n", __func__, ep, ep->hwtid);
1206 memset(&event, 0, sizeof(event));
1207 event.event = IW_CM_EVENT_CLOSE;
1208 event.status = status;
1209 if (ep->com.cm_id) {
1210 PDBG("close complete delivered ep %p cm_id %p tid %u\n",
1211 ep, ep->com.cm_id, ep->hwtid);
1212 ep->com.cm_id->event_handler(ep->com.cm_id, &event);
1213 deref_cm_id(&ep->com);
1214 set_bit(CLOSE_UPCALL, &ep->com.history);
1218 static void peer_close_upcall(struct c4iw_ep *ep)
1220 struct iw_cm_event event;
1222 PDBG("%s ep %p tid %u\n", __func__, ep, ep->hwtid);
1223 memset(&event, 0, sizeof(event));
1224 event.event = IW_CM_EVENT_DISCONNECT;
1225 if (ep->com.cm_id) {
1226 PDBG("peer close delivered ep %p cm_id %p tid %u\n",
1227 ep, ep->com.cm_id, ep->hwtid);
1228 ep->com.cm_id->event_handler(ep->com.cm_id, &event);
1229 set_bit(DISCONN_UPCALL, &ep->com.history);
1233 static void peer_abort_upcall(struct c4iw_ep *ep)
1235 struct iw_cm_event event;
1237 PDBG("%s ep %p tid %u\n", __func__, ep, ep->hwtid);
1238 memset(&event, 0, sizeof(event));
1239 event.event = IW_CM_EVENT_CLOSE;
1240 event.status = -ECONNRESET;
1241 if (ep->com.cm_id) {
1242 PDBG("abort delivered ep %p cm_id %p tid %u\n", ep,
1243 ep->com.cm_id, ep->hwtid);
1244 ep->com.cm_id->event_handler(ep->com.cm_id, &event);
1245 deref_cm_id(&ep->com);
1246 set_bit(ABORT_UPCALL, &ep->com.history);
1250 static void connect_reply_upcall(struct c4iw_ep *ep, int status)
1252 struct iw_cm_event event;
1254 PDBG("%s ep %p tid %u status %d\n", __func__, ep, ep->hwtid, status);
1255 memset(&event, 0, sizeof(event));
1256 event.event = IW_CM_EVENT_CONNECT_REPLY;
1257 event.status = status;
1258 memcpy(&event.local_addr, &ep->com.local_addr,
1259 sizeof(ep->com.local_addr));
1260 memcpy(&event.remote_addr, &ep->com.remote_addr,
1261 sizeof(ep->com.remote_addr));
1263 if ((status == 0) || (status == -ECONNREFUSED)) {
1264 if (!ep->tried_with_mpa_v1) {
1265 /* this means MPA_v2 is used */
1266 event.ord = ep->ird;
1267 event.ird = ep->ord;
1268 event.private_data_len = ep->plen -
1269 sizeof(struct mpa_v2_conn_params);
1270 event.private_data = ep->mpa_pkt +
1271 sizeof(struct mpa_message) +
1272 sizeof(struct mpa_v2_conn_params);
1274 /* this means MPA_v1 is used */
1275 event.ord = cur_max_read_depth(ep->com.dev);
1276 event.ird = cur_max_read_depth(ep->com.dev);
1277 event.private_data_len = ep->plen;
1278 event.private_data = ep->mpa_pkt +
1279 sizeof(struct mpa_message);
1283 PDBG("%s ep %p tid %u status %d\n", __func__, ep,
1285 set_bit(CONN_RPL_UPCALL, &ep->com.history);
1286 ep->com.cm_id->event_handler(ep->com.cm_id, &event);
1289 deref_cm_id(&ep->com);
1292 static int connect_request_upcall(struct c4iw_ep *ep)
1294 struct iw_cm_event event;
1297 PDBG("%s ep %p tid %u\n", __func__, ep, ep->hwtid);
1298 memset(&event, 0, sizeof(event));
1299 event.event = IW_CM_EVENT_CONNECT_REQUEST;
1300 memcpy(&event.local_addr, &ep->com.local_addr,
1301 sizeof(ep->com.local_addr));
1302 memcpy(&event.remote_addr, &ep->com.remote_addr,
1303 sizeof(ep->com.remote_addr));
1304 event.provider_data = ep;
1305 if (!ep->tried_with_mpa_v1) {
1306 /* this means MPA_v2 is used */
1307 event.ord = ep->ord;
1308 event.ird = ep->ird;
1309 event.private_data_len = ep->plen -
1310 sizeof(struct mpa_v2_conn_params);
1311 event.private_data = ep->mpa_pkt + sizeof(struct mpa_message) +
1312 sizeof(struct mpa_v2_conn_params);
1314 /* this means MPA_v1 is used. Send max supported */
1315 event.ord = cur_max_read_depth(ep->com.dev);
1316 event.ird = cur_max_read_depth(ep->com.dev);
1317 event.private_data_len = ep->plen;
1318 event.private_data = ep->mpa_pkt + sizeof(struct mpa_message);
1320 c4iw_get_ep(&ep->com);
1321 ret = ep->parent_ep->com.cm_id->event_handler(ep->parent_ep->com.cm_id,
1324 c4iw_put_ep(&ep->com);
1325 set_bit(CONNREQ_UPCALL, &ep->com.history);
1326 c4iw_put_ep(&ep->parent_ep->com);
1330 static void established_upcall(struct c4iw_ep *ep)
1332 struct iw_cm_event event;
1334 PDBG("%s ep %p tid %u\n", __func__, ep, ep->hwtid);
1335 memset(&event, 0, sizeof(event));
1336 event.event = IW_CM_EVENT_ESTABLISHED;
1337 event.ird = ep->ord;
1338 event.ord = ep->ird;
1339 if (ep->com.cm_id) {
1340 PDBG("%s ep %p tid %u\n", __func__, ep, ep->hwtid);
1341 ep->com.cm_id->event_handler(ep->com.cm_id, &event);
1342 set_bit(ESTAB_UPCALL, &ep->com.history);
1346 static int update_rx_credits(struct c4iw_ep *ep, u32 credits)
1348 struct cpl_rx_data_ack *req;
1349 struct sk_buff *skb;
1350 int wrlen = roundup(sizeof *req, 16);
1352 PDBG("%s ep %p tid %u credits %u\n", __func__, ep, ep->hwtid, credits);
1353 skb = get_skb(NULL, wrlen, GFP_KERNEL);
1355 printk(KERN_ERR MOD "update_rx_credits - cannot alloc skb!\n");
1360 * If we couldn't specify the entire rcv window at connection setup
1361 * due to the limit in the number of bits in the RCV_BUFSIZ field,
1362 * then add the overage in to the credits returned.
1364 if (ep->rcv_win > RCV_BUFSIZ_M * 1024)
1365 credits += ep->rcv_win - RCV_BUFSIZ_M * 1024;
1367 req = (struct cpl_rx_data_ack *) skb_put(skb, wrlen);
1368 memset(req, 0, wrlen);
1369 INIT_TP_WR(req, ep->hwtid);
1370 OPCODE_TID(req) = cpu_to_be32(MK_OPCODE_TID(CPL_RX_DATA_ACK,
1372 req->credit_dack = cpu_to_be32(credits | RX_FORCE_ACK_F |
1374 RX_DACK_MODE_V(dack_mode));
1375 set_wr_txq(skb, CPL_PRIORITY_ACK, ep->ctrlq_idx);
1376 c4iw_ofld_send(&ep->com.dev->rdev, skb);
1380 #define RELAXED_IRD_NEGOTIATION 1
1383 * process_mpa_reply - process streaming mode MPA reply
1387 * 0 upon success indicating a connect request was delivered to the ULP
1388 * or the mpa request is incomplete but valid so far.
1390 * 1 if a failure requires the caller to close the connection.
1392 * 2 if a failure requires the caller to abort the connection.
1394 static int process_mpa_reply(struct c4iw_ep *ep, struct sk_buff *skb)
1396 struct mpa_message *mpa;
1397 struct mpa_v2_conn_params *mpa_v2_params;
1399 u16 resp_ird, resp_ord;
1400 u8 rtr_mismatch = 0, insuff_ird = 0;
1401 struct c4iw_qp_attributes attrs;
1402 enum c4iw_qp_attr_mask mask;
1406 PDBG("%s ep %p tid %u\n", __func__, ep, ep->hwtid);
1409 * If we get more than the supported amount of private data
1410 * then we must fail this connection.
1412 if (ep->mpa_pkt_len + skb->len > sizeof(ep->mpa_pkt)) {
1414 goto err_stop_timer;
1418 * copy the new data into our accumulation buffer.
1420 skb_copy_from_linear_data(skb, &(ep->mpa_pkt[ep->mpa_pkt_len]),
1422 ep->mpa_pkt_len += skb->len;
1425 * if we don't even have the mpa message, then bail.
1427 if (ep->mpa_pkt_len < sizeof(*mpa))
1429 mpa = (struct mpa_message *) ep->mpa_pkt;
1431 /* Validate MPA header. */
1432 if (mpa->revision > mpa_rev) {
1433 printk(KERN_ERR MOD "%s MPA version mismatch. Local = %d,"
1434 " Received = %d\n", __func__, mpa_rev, mpa->revision);
1436 goto err_stop_timer;
1438 if (memcmp(mpa->key, MPA_KEY_REP, sizeof(mpa->key))) {
1440 goto err_stop_timer;
1443 plen = ntohs(mpa->private_data_size);
1446 * Fail if there's too much private data.
1448 if (plen > MPA_MAX_PRIVATE_DATA) {
1450 goto err_stop_timer;
1454 * If plen does not account for pkt size
1456 if (ep->mpa_pkt_len > (sizeof(*mpa) + plen)) {
1458 goto err_stop_timer;
1461 ep->plen = (u8) plen;
1464 * If we don't have all the pdata yet, then bail.
1465 * We'll continue process when more data arrives.
1467 if (ep->mpa_pkt_len < (sizeof(*mpa) + plen))
1470 if (mpa->flags & MPA_REJECT) {
1471 err = -ECONNREFUSED;
1472 goto err_stop_timer;
1476 * Stop mpa timer. If it expired, then
1477 * we ignore the MPA reply. process_timeout()
1478 * will abort the connection.
1480 if (stop_ep_timer(ep))
1484 * If we get here we have accumulated the entire mpa
1485 * start reply message including private data. And
1486 * the MPA header is valid.
1488 __state_set(&ep->com, FPDU_MODE);
1489 ep->mpa_attr.crc_enabled = (mpa->flags & MPA_CRC) | crc_enabled ? 1 : 0;
1490 ep->mpa_attr.recv_marker_enabled = markers_enabled;
1491 ep->mpa_attr.xmit_marker_enabled = mpa->flags & MPA_MARKERS ? 1 : 0;
1492 ep->mpa_attr.version = mpa->revision;
1493 ep->mpa_attr.p2p_type = FW_RI_INIT_P2PTYPE_DISABLED;
1495 if (mpa->revision == 2) {
1496 ep->mpa_attr.enhanced_rdma_conn =
1497 mpa->flags & MPA_ENHANCED_RDMA_CONN ? 1 : 0;
1498 if (ep->mpa_attr.enhanced_rdma_conn) {
1499 mpa_v2_params = (struct mpa_v2_conn_params *)
1500 (ep->mpa_pkt + sizeof(*mpa));
1501 resp_ird = ntohs(mpa_v2_params->ird) &
1502 MPA_V2_IRD_ORD_MASK;
1503 resp_ord = ntohs(mpa_v2_params->ord) &
1504 MPA_V2_IRD_ORD_MASK;
1505 PDBG("%s responder ird %u ord %u ep ird %u ord %u\n",
1506 __func__, resp_ird, resp_ord, ep->ird, ep->ord);
1509 * This is a double-check. Ideally, below checks are
1510 * not required since ird/ord stuff has been taken
1511 * care of in c4iw_accept_cr
1513 if (ep->ird < resp_ord) {
1514 if (RELAXED_IRD_NEGOTIATION && resp_ord <=
1515 ep->com.dev->rdev.lldi.max_ordird_qp)
1519 } else if (ep->ird > resp_ord) {
1522 if (ep->ord > resp_ird) {
1523 if (RELAXED_IRD_NEGOTIATION)
1534 if (ntohs(mpa_v2_params->ird) &
1535 MPA_V2_PEER2PEER_MODEL) {
1536 if (ntohs(mpa_v2_params->ord) &
1537 MPA_V2_RDMA_WRITE_RTR)
1538 ep->mpa_attr.p2p_type =
1539 FW_RI_INIT_P2PTYPE_RDMA_WRITE;
1540 else if (ntohs(mpa_v2_params->ord) &
1541 MPA_V2_RDMA_READ_RTR)
1542 ep->mpa_attr.p2p_type =
1543 FW_RI_INIT_P2PTYPE_READ_REQ;
1546 } else if (mpa->revision == 1)
1548 ep->mpa_attr.p2p_type = p2p_type;
1550 PDBG("%s - crc_enabled=%d, recv_marker_enabled=%d, "
1551 "xmit_marker_enabled=%d, version=%d p2p_type=%d local-p2p_type = "
1552 "%d\n", __func__, ep->mpa_attr.crc_enabled,
1553 ep->mpa_attr.recv_marker_enabled,
1554 ep->mpa_attr.xmit_marker_enabled, ep->mpa_attr.version,
1555 ep->mpa_attr.p2p_type, p2p_type);
1558 * If responder's RTR does not match with that of initiator, assign
1559 * FW_RI_INIT_P2PTYPE_DISABLED in mpa attributes so that RTR is not
1560 * generated when moving QP to RTS state.
1561 * A TERM message will be sent after QP has moved to RTS state
1563 if ((ep->mpa_attr.version == 2) && peer2peer &&
1564 (ep->mpa_attr.p2p_type != p2p_type)) {
1565 ep->mpa_attr.p2p_type = FW_RI_INIT_P2PTYPE_DISABLED;
1569 attrs.mpa_attr = ep->mpa_attr;
1570 attrs.max_ird = ep->ird;
1571 attrs.max_ord = ep->ord;
1572 attrs.llp_stream_handle = ep;
1573 attrs.next_state = C4IW_QP_STATE_RTS;
1575 mask = C4IW_QP_ATTR_NEXT_STATE |
1576 C4IW_QP_ATTR_LLP_STREAM_HANDLE | C4IW_QP_ATTR_MPA_ATTR |
1577 C4IW_QP_ATTR_MAX_IRD | C4IW_QP_ATTR_MAX_ORD;
1579 /* bind QP and TID with INIT_WR */
1580 err = c4iw_modify_qp(ep->com.qp->rhp,
1581 ep->com.qp, mask, &attrs, 1);
1586 * If responder's RTR requirement did not match with what initiator
1587 * supports, generate TERM message
1590 printk(KERN_ERR "%s: RTR mismatch, sending TERM\n", __func__);
1591 attrs.layer_etype = LAYER_MPA | DDP_LLP;
1592 attrs.ecode = MPA_NOMATCH_RTR;
1593 attrs.next_state = C4IW_QP_STATE_TERMINATE;
1594 attrs.send_term = 1;
1595 err = c4iw_modify_qp(ep->com.qp->rhp, ep->com.qp,
1596 C4IW_QP_ATTR_NEXT_STATE, &attrs, 1);
1603 * Generate TERM if initiator IRD is not sufficient for responder
1604 * provided ORD. Currently, we do the same behaviour even when
1605 * responder provided IRD is also not sufficient as regards to
1609 printk(KERN_ERR "%s: Insufficient IRD, sending TERM\n",
1611 attrs.layer_etype = LAYER_MPA | DDP_LLP;
1612 attrs.ecode = MPA_INSUFF_IRD;
1613 attrs.next_state = C4IW_QP_STATE_TERMINATE;
1614 attrs.send_term = 1;
1615 err = c4iw_modify_qp(ep->com.qp->rhp, ep->com.qp,
1616 C4IW_QP_ATTR_NEXT_STATE, &attrs, 1);
1627 connect_reply_upcall(ep, err);
1632 * process_mpa_request - process streaming mode MPA request
1636 * 0 upon success indicating a connect request was delivered to the ULP
1637 * or the mpa request is incomplete but valid so far.
1639 * 1 if a failure requires the caller to close the connection.
1641 * 2 if a failure requires the caller to abort the connection.
1643 static int process_mpa_request(struct c4iw_ep *ep, struct sk_buff *skb)
1645 struct mpa_message *mpa;
1646 struct mpa_v2_conn_params *mpa_v2_params;
1649 PDBG("%s ep %p tid %u\n", __func__, ep, ep->hwtid);
1652 * If we get more than the supported amount of private data
1653 * then we must fail this connection.
1655 if (ep->mpa_pkt_len + skb->len > sizeof(ep->mpa_pkt))
1656 goto err_stop_timer;
1658 PDBG("%s enter (%s line %u)\n", __func__, __FILE__, __LINE__);
1661 * Copy the new data into our accumulation buffer.
1663 skb_copy_from_linear_data(skb, &(ep->mpa_pkt[ep->mpa_pkt_len]),
1665 ep->mpa_pkt_len += skb->len;
1668 * If we don't even have the mpa message, then bail.
1669 * We'll continue process when more data arrives.
1671 if (ep->mpa_pkt_len < sizeof(*mpa))
1674 PDBG("%s enter (%s line %u)\n", __func__, __FILE__, __LINE__);
1675 mpa = (struct mpa_message *) ep->mpa_pkt;
1678 * Validate MPA Header.
1680 if (mpa->revision > mpa_rev) {
1681 printk(KERN_ERR MOD "%s MPA version mismatch. Local = %d,"
1682 " Received = %d\n", __func__, mpa_rev, mpa->revision);
1683 goto err_stop_timer;
1686 if (memcmp(mpa->key, MPA_KEY_REQ, sizeof(mpa->key)))
1687 goto err_stop_timer;
1689 plen = ntohs(mpa->private_data_size);
1692 * Fail if there's too much private data.
1694 if (plen > MPA_MAX_PRIVATE_DATA)
1695 goto err_stop_timer;
1698 * If plen does not account for pkt size
1700 if (ep->mpa_pkt_len > (sizeof(*mpa) + plen))
1701 goto err_stop_timer;
1702 ep->plen = (u8) plen;
1705 * If we don't have all the pdata yet, then bail.
1707 if (ep->mpa_pkt_len < (sizeof(*mpa) + plen))
1711 * If we get here we have accumulated the entire mpa
1712 * start reply message including private data.
1714 ep->mpa_attr.initiator = 0;
1715 ep->mpa_attr.crc_enabled = (mpa->flags & MPA_CRC) | crc_enabled ? 1 : 0;
1716 ep->mpa_attr.recv_marker_enabled = markers_enabled;
1717 ep->mpa_attr.xmit_marker_enabled = mpa->flags & MPA_MARKERS ? 1 : 0;
1718 ep->mpa_attr.version = mpa->revision;
1719 if (mpa->revision == 1)
1720 ep->tried_with_mpa_v1 = 1;
1721 ep->mpa_attr.p2p_type = FW_RI_INIT_P2PTYPE_DISABLED;
1723 if (mpa->revision == 2) {
1724 ep->mpa_attr.enhanced_rdma_conn =
1725 mpa->flags & MPA_ENHANCED_RDMA_CONN ? 1 : 0;
1726 if (ep->mpa_attr.enhanced_rdma_conn) {
1727 mpa_v2_params = (struct mpa_v2_conn_params *)
1728 (ep->mpa_pkt + sizeof(*mpa));
1729 ep->ird = ntohs(mpa_v2_params->ird) &
1730 MPA_V2_IRD_ORD_MASK;
1731 ep->ord = ntohs(mpa_v2_params->ord) &
1732 MPA_V2_IRD_ORD_MASK;
1733 PDBG("%s initiator ird %u ord %u\n", __func__, ep->ird,
1735 if (ntohs(mpa_v2_params->ird) & MPA_V2_PEER2PEER_MODEL)
1737 if (ntohs(mpa_v2_params->ord) &
1738 MPA_V2_RDMA_WRITE_RTR)
1739 ep->mpa_attr.p2p_type =
1740 FW_RI_INIT_P2PTYPE_RDMA_WRITE;
1741 else if (ntohs(mpa_v2_params->ord) &
1742 MPA_V2_RDMA_READ_RTR)
1743 ep->mpa_attr.p2p_type =
1744 FW_RI_INIT_P2PTYPE_READ_REQ;
1747 } else if (mpa->revision == 1)
1749 ep->mpa_attr.p2p_type = p2p_type;
1751 PDBG("%s - crc_enabled=%d, recv_marker_enabled=%d, "
1752 "xmit_marker_enabled=%d, version=%d p2p_type=%d\n", __func__,
1753 ep->mpa_attr.crc_enabled, ep->mpa_attr.recv_marker_enabled,
1754 ep->mpa_attr.xmit_marker_enabled, ep->mpa_attr.version,
1755 ep->mpa_attr.p2p_type);
1757 __state_set(&ep->com, MPA_REQ_RCVD);
1760 mutex_lock_nested(&ep->parent_ep->com.mutex, SINGLE_DEPTH_NESTING);
1761 if (ep->parent_ep->com.state != DEAD) {
1762 if (connect_request_upcall(ep))
1763 goto err_unlock_parent;
1765 goto err_unlock_parent;
1767 mutex_unlock(&ep->parent_ep->com.mutex);
1771 mutex_unlock(&ep->parent_ep->com.mutex);
1774 (void)stop_ep_timer(ep);
1779 static int rx_data(struct c4iw_dev *dev, struct sk_buff *skb)
1782 struct cpl_rx_data *hdr = cplhdr(skb);
1783 unsigned int dlen = ntohs(hdr->len);
1784 unsigned int tid = GET_TID(hdr);
1785 struct tid_info *t = dev->rdev.lldi.tids;
1786 __u8 status = hdr->status;
1789 ep = lookup_tid(t, tid);
1792 PDBG("%s ep %p tid %u dlen %u\n", __func__, ep, ep->hwtid, dlen);
1793 skb_pull(skb, sizeof(*hdr));
1794 skb_trim(skb, dlen);
1795 mutex_lock(&ep->com.mutex);
1797 /* update RX credits */
1798 update_rx_credits(ep, dlen);
1800 switch (ep->com.state) {
1802 ep->rcv_seq += dlen;
1803 disconnect = process_mpa_reply(ep, skb);
1806 ep->rcv_seq += dlen;
1807 process_mpa_request(ep, skb);
1810 struct c4iw_qp_attributes attrs;
1811 BUG_ON(!ep->com.qp);
1813 pr_err("%s Unexpected streaming data." \
1814 " qpid %u ep %p state %d tid %u status %d\n",
1815 __func__, ep->com.qp->wq.sq.qid, ep,
1816 ep->com.state, ep->hwtid, status);
1817 attrs.next_state = C4IW_QP_STATE_TERMINATE;
1818 c4iw_modify_qp(ep->com.qp->rhp, ep->com.qp,
1819 C4IW_QP_ATTR_NEXT_STATE, &attrs, 1);
1826 mutex_unlock(&ep->com.mutex);
1828 c4iw_ep_disconnect(ep, 0, GFP_KERNEL);
1832 static int abort_rpl(struct c4iw_dev *dev, struct sk_buff *skb)
1835 struct cpl_abort_rpl_rss *rpl = cplhdr(skb);
1837 unsigned int tid = GET_TID(rpl);
1838 struct tid_info *t = dev->rdev.lldi.tids;
1840 ep = lookup_tid(t, tid);
1842 printk(KERN_WARNING MOD "Abort rpl to freed endpoint\n");
1845 PDBG("%s ep %p tid %u\n", __func__, ep, ep->hwtid);
1846 mutex_lock(&ep->com.mutex);
1847 switch (ep->com.state) {
1849 c4iw_wake_up(&ep->com.wr_wait, -ECONNRESET);
1850 __state_set(&ep->com, DEAD);
1854 printk(KERN_ERR "%s ep %p state %d\n",
1855 __func__, ep, ep->com.state);
1858 mutex_unlock(&ep->com.mutex);
1861 release_ep_resources(ep);
1865 static int send_fw_act_open_req(struct c4iw_ep *ep, unsigned int atid)
1867 struct sk_buff *skb;
1868 struct fw_ofld_connection_wr *req;
1869 unsigned int mtu_idx;
1871 struct sockaddr_in *sin;
1874 skb = get_skb(NULL, sizeof(*req), GFP_KERNEL);
1875 req = (struct fw_ofld_connection_wr *)__skb_put(skb, sizeof(*req));
1876 memset(req, 0, sizeof(*req));
1877 req->op_compl = htonl(WR_OP_V(FW_OFLD_CONNECTION_WR));
1878 req->len16_pkd = htonl(FW_WR_LEN16_V(DIV_ROUND_UP(sizeof(*req), 16)));
1879 req->le.filter = cpu_to_be32(cxgb4_select_ntuple(
1880 ep->com.dev->rdev.lldi.ports[0],
1882 sin = (struct sockaddr_in *)&ep->com.local_addr;
1883 req->le.lport = sin->sin_port;
1884 req->le.u.ipv4.lip = sin->sin_addr.s_addr;
1885 sin = (struct sockaddr_in *)&ep->com.remote_addr;
1886 req->le.pport = sin->sin_port;
1887 req->le.u.ipv4.pip = sin->sin_addr.s_addr;
1888 req->tcb.t_state_to_astid =
1889 htonl(FW_OFLD_CONNECTION_WR_T_STATE_V(TCP_SYN_SENT) |
1890 FW_OFLD_CONNECTION_WR_ASTID_V(atid));
1891 req->tcb.cplrxdataack_cplpassacceptrpl =
1892 htons(FW_OFLD_CONNECTION_WR_CPLRXDATAACK_F);
1893 req->tcb.tx_max = (__force __be32) jiffies;
1894 req->tcb.rcv_adv = htons(1);
1895 best_mtu(ep->com.dev->rdev.lldi.mtus, ep->mtu, &mtu_idx,
1896 enable_tcp_timestamps,
1897 (AF_INET == ep->com.remote_addr.ss_family) ? 0 : 1);
1898 wscale = compute_wscale(rcv_win);
1901 * Specify the largest window that will fit in opt0. The
1902 * remainder will be specified in the rx_data_ack.
1904 win = ep->rcv_win >> 10;
1905 if (win > RCV_BUFSIZ_M)
1908 req->tcb.opt0 = (__force __be64) (TCAM_BYPASS_F |
1909 (nocong ? NO_CONG_F : 0) |
1912 WND_SCALE_V(wscale) |
1913 MSS_IDX_V(mtu_idx) |
1914 L2T_IDX_V(ep->l2t->idx) |
1915 TX_CHAN_V(ep->tx_chan) |
1916 SMAC_SEL_V(ep->smac_idx) |
1917 DSCP_V(ep->tos >> 2) |
1918 ULP_MODE_V(ULP_MODE_TCPDDP) |
1920 req->tcb.opt2 = (__force __be32) (PACE_V(1) |
1921 TX_QUEUE_V(ep->com.dev->rdev.lldi.tx_modq[ep->tx_chan]) |
1923 CCTRL_ECN_V(enable_ecn) |
1924 RSS_QUEUE_VALID_F | RSS_QUEUE_V(ep->rss_qid));
1925 if (enable_tcp_timestamps)
1926 req->tcb.opt2 |= (__force __be32)TSTAMPS_EN_F;
1927 if (enable_tcp_sack)
1928 req->tcb.opt2 |= (__force __be32)SACK_EN_F;
1929 if (wscale && enable_tcp_window_scaling)
1930 req->tcb.opt2 |= (__force __be32)WND_SCALE_EN_F;
1931 req->tcb.opt0 = cpu_to_be64((__force u64)req->tcb.opt0);
1932 req->tcb.opt2 = cpu_to_be32((__force u32)req->tcb.opt2);
1933 set_wr_txq(skb, CPL_PRIORITY_CONTROL, ep->ctrlq_idx);
1934 set_bit(ACT_OFLD_CONN, &ep->com.history);
1935 return c4iw_l2t_send(&ep->com.dev->rdev, skb, ep->l2t);
1939 * Return whether a failed active open has allocated a TID
1941 static inline int act_open_has_tid(int status)
1943 return status != CPL_ERR_TCAM_FULL && status != CPL_ERR_CONN_EXIST &&
1944 status != CPL_ERR_ARP_MISS;
1947 /* Returns whether a CPL status conveys negative advice.
1949 static int is_neg_adv(unsigned int status)
1951 return status == CPL_ERR_RTX_NEG_ADVICE ||
1952 status == CPL_ERR_PERSIST_NEG_ADVICE ||
1953 status == CPL_ERR_KEEPALV_NEG_ADVICE;
1956 static char *neg_adv_str(unsigned int status)
1959 case CPL_ERR_RTX_NEG_ADVICE:
1960 return "Retransmit timeout";
1961 case CPL_ERR_PERSIST_NEG_ADVICE:
1962 return "Persist timeout";
1963 case CPL_ERR_KEEPALV_NEG_ADVICE:
1964 return "Keepalive timeout";
1970 static void set_tcp_window(struct c4iw_ep *ep, struct port_info *pi)
1972 ep->snd_win = snd_win;
1973 ep->rcv_win = rcv_win;
1974 PDBG("%s snd_win %d rcv_win %d\n", __func__, ep->snd_win, ep->rcv_win);
1977 #define ACT_OPEN_RETRY_COUNT 2
1979 static int import_ep(struct c4iw_ep *ep, int iptype, __u8 *peer_ip,
1980 struct dst_entry *dst, struct c4iw_dev *cdev,
1981 bool clear_mpa_v1, enum chip_type adapter_type, u8 tos)
1983 struct neighbour *n;
1985 struct net_device *pdev;
1987 n = dst_neigh_lookup(dst, peer_ip);
1993 if (n->dev->flags & IFF_LOOPBACK) {
1995 pdev = ip_dev_find(&init_net, *(__be32 *)peer_ip);
1996 else if (IS_ENABLED(CONFIG_IPV6))
1997 for_each_netdev(&init_net, pdev) {
1998 if (ipv6_chk_addr(&init_net,
1999 (struct in6_addr *)peer_ip,
2010 ep->l2t = cxgb4_l2t_get(cdev->rdev.lldi.l2t,
2011 n, pdev, rt_tos2priority(tos));
2014 ep->mtu = pdev->mtu;
2015 ep->tx_chan = cxgb4_port_chan(pdev);
2016 ep->smac_idx = cxgb4_tp_smt_idx(adapter_type,
2017 cxgb4_port_viid(pdev));
2018 step = cdev->rdev.lldi.ntxq /
2019 cdev->rdev.lldi.nchan;
2020 ep->txq_idx = cxgb4_port_idx(pdev) * step;
2021 step = cdev->rdev.lldi.nrxq /
2022 cdev->rdev.lldi.nchan;
2023 ep->ctrlq_idx = cxgb4_port_idx(pdev);
2024 ep->rss_qid = cdev->rdev.lldi.rxq_ids[
2025 cxgb4_port_idx(pdev) * step];
2026 set_tcp_window(ep, (struct port_info *)netdev_priv(pdev));
2029 pdev = get_real_dev(n->dev);
2030 ep->l2t = cxgb4_l2t_get(cdev->rdev.lldi.l2t,
2034 ep->mtu = dst_mtu(dst);
2035 ep->tx_chan = cxgb4_port_chan(pdev);
2036 ep->smac_idx = cxgb4_tp_smt_idx(adapter_type,
2037 cxgb4_port_viid(pdev));
2038 step = cdev->rdev.lldi.ntxq /
2039 cdev->rdev.lldi.nchan;
2040 ep->txq_idx = cxgb4_port_idx(pdev) * step;
2041 ep->ctrlq_idx = cxgb4_port_idx(pdev);
2042 step = cdev->rdev.lldi.nrxq /
2043 cdev->rdev.lldi.nchan;
2044 ep->rss_qid = cdev->rdev.lldi.rxq_ids[
2045 cxgb4_port_idx(pdev) * step];
2046 set_tcp_window(ep, (struct port_info *)netdev_priv(pdev));
2049 ep->retry_with_mpa_v1 = 0;
2050 ep->tried_with_mpa_v1 = 0;
2062 static int c4iw_reconnect(struct c4iw_ep *ep)
2065 struct sockaddr_in *laddr = (struct sockaddr_in *)
2066 &ep->com.cm_id->m_local_addr;
2067 struct sockaddr_in *raddr = (struct sockaddr_in *)
2068 &ep->com.cm_id->m_remote_addr;
2069 struct sockaddr_in6 *laddr6 = (struct sockaddr_in6 *)
2070 &ep->com.cm_id->m_local_addr;
2071 struct sockaddr_in6 *raddr6 = (struct sockaddr_in6 *)
2072 &ep->com.cm_id->m_remote_addr;
2076 PDBG("%s qp %p cm_id %p\n", __func__, ep->com.qp, ep->com.cm_id);
2077 init_timer(&ep->timer);
2080 * Allocate an active TID to initiate a TCP connection.
2082 ep->atid = cxgb4_alloc_atid(ep->com.dev->rdev.lldi.tids, ep);
2083 if (ep->atid == -1) {
2084 pr_err("%s - cannot alloc atid.\n", __func__);
2088 insert_handle(ep->com.dev, &ep->com.dev->atid_idr, ep, ep->atid);
2091 if (ep->com.cm_id->m_local_addr.ss_family == AF_INET) {
2092 ep->dst = find_route(ep->com.dev, laddr->sin_addr.s_addr,
2093 raddr->sin_addr.s_addr, laddr->sin_port,
2094 raddr->sin_port, ep->com.cm_id->tos);
2096 ra = (__u8 *)&raddr->sin_addr;
2098 ep->dst = find_route6(ep->com.dev, laddr6->sin6_addr.s6_addr,
2099 raddr6->sin6_addr.s6_addr,
2100 laddr6->sin6_port, raddr6->sin6_port, 0,
2101 raddr6->sin6_scope_id);
2103 ra = (__u8 *)&raddr6->sin6_addr;
2106 pr_err("%s - cannot find route.\n", __func__);
2107 err = -EHOSTUNREACH;
2110 err = import_ep(ep, iptype, ra, ep->dst, ep->com.dev, false,
2111 ep->com.dev->rdev.lldi.adapter_type,
2112 ep->com.cm_id->tos);
2114 pr_err("%s - cannot alloc l2e.\n", __func__);
2118 PDBG("%s txq_idx %u tx_chan %u smac_idx %u rss_qid %u l2t_idx %u\n",
2119 __func__, ep->txq_idx, ep->tx_chan, ep->smac_idx, ep->rss_qid,
2122 state_set(&ep->com, CONNECTING);
2123 ep->tos = ep->com.cm_id->tos;
2125 /* send connect request to rnic */
2126 err = send_connect(ep);
2130 cxgb4_l2t_release(ep->l2t);
2132 dst_release(ep->dst);
2134 remove_handle(ep->com.dev, &ep->com.dev->atid_idr, ep->atid);
2135 cxgb4_free_atid(ep->com.dev->rdev.lldi.tids, ep->atid);
2138 * remember to send notification to upper layer.
2139 * We are in here so the upper layer is not aware that this is
2140 * re-connect attempt and so, upper layer is still waiting for
2141 * response of 1st connect request.
2143 connect_reply_upcall(ep, -ECONNRESET);
2144 c4iw_put_ep(&ep->com);
2149 static int act_open_rpl(struct c4iw_dev *dev, struct sk_buff *skb)
2152 struct cpl_act_open_rpl *rpl = cplhdr(skb);
2153 unsigned int atid = TID_TID_G(AOPEN_ATID_G(
2154 ntohl(rpl->atid_status)));
2155 struct tid_info *t = dev->rdev.lldi.tids;
2156 int status = AOPEN_STATUS_G(ntohl(rpl->atid_status));
2157 struct sockaddr_in *la;
2158 struct sockaddr_in *ra;
2159 struct sockaddr_in6 *la6;
2160 struct sockaddr_in6 *ra6;
2163 ep = lookup_atid(t, atid);
2164 la = (struct sockaddr_in *)&ep->com.local_addr;
2165 ra = (struct sockaddr_in *)&ep->com.remote_addr;
2166 la6 = (struct sockaddr_in6 *)&ep->com.local_addr;
2167 ra6 = (struct sockaddr_in6 *)&ep->com.remote_addr;
2169 PDBG("%s ep %p atid %u status %u errno %d\n", __func__, ep, atid,
2170 status, status2errno(status));
2172 if (is_neg_adv(status)) {
2173 PDBG("%s Connection problems for atid %u status %u (%s)\n",
2174 __func__, atid, status, neg_adv_str(status));
2175 ep->stats.connect_neg_adv++;
2176 mutex_lock(&dev->rdev.stats.lock);
2177 dev->rdev.stats.neg_adv++;
2178 mutex_unlock(&dev->rdev.stats.lock);
2182 set_bit(ACT_OPEN_RPL, &ep->com.history);
2185 * Log interesting failures.
2188 case CPL_ERR_CONN_RESET:
2189 case CPL_ERR_CONN_TIMEDOUT:
2191 case CPL_ERR_TCAM_FULL:
2192 mutex_lock(&dev->rdev.stats.lock);
2193 dev->rdev.stats.tcam_full++;
2194 mutex_unlock(&dev->rdev.stats.lock);
2195 if (ep->com.local_addr.ss_family == AF_INET &&
2196 dev->rdev.lldi.enable_fw_ofld_conn) {
2197 ret = send_fw_act_open_req(ep, TID_TID_G(AOPEN_ATID_G(
2198 ntohl(rpl->atid_status))));
2204 case CPL_ERR_CONN_EXIST:
2205 if (ep->retry_count++ < ACT_OPEN_RETRY_COUNT) {
2206 set_bit(ACT_RETRY_INUSE, &ep->com.history);
2207 if (ep->com.remote_addr.ss_family == AF_INET6) {
2208 struct sockaddr_in6 *sin6 =
2209 (struct sockaddr_in6 *)
2210 &ep->com.local_addr;
2212 ep->com.dev->rdev.lldi.ports[0],
2214 &sin6->sin6_addr.s6_addr, 1);
2216 remove_handle(ep->com.dev, &ep->com.dev->atid_idr,
2218 cxgb4_free_atid(t, atid);
2219 dst_release(ep->dst);
2220 cxgb4_l2t_release(ep->l2t);
2226 if (ep->com.local_addr.ss_family == AF_INET) {
2227 pr_info("Active open failure - atid %u status %u errno %d %pI4:%u->%pI4:%u\n",
2228 atid, status, status2errno(status),
2229 &la->sin_addr.s_addr, ntohs(la->sin_port),
2230 &ra->sin_addr.s_addr, ntohs(ra->sin_port));
2232 pr_info("Active open failure - atid %u status %u errno %d %pI6:%u->%pI6:%u\n",
2233 atid, status, status2errno(status),
2234 la6->sin6_addr.s6_addr, ntohs(la6->sin6_port),
2235 ra6->sin6_addr.s6_addr, ntohs(ra6->sin6_port));
2241 connect_reply_upcall(ep, status2errno(status));
2242 state_set(&ep->com, DEAD);
2244 if (ep->com.remote_addr.ss_family == AF_INET6) {
2245 struct sockaddr_in6 *sin6 =
2246 (struct sockaddr_in6 *)&ep->com.local_addr;
2247 cxgb4_clip_release(ep->com.dev->rdev.lldi.ports[0],
2248 (const u32 *)&sin6->sin6_addr.s6_addr, 1);
2250 if (status && act_open_has_tid(status))
2251 cxgb4_remove_tid(ep->com.dev->rdev.lldi.tids, 0, GET_TID(rpl));
2253 remove_handle(ep->com.dev, &ep->com.dev->atid_idr, atid);
2254 cxgb4_free_atid(t, atid);
2255 dst_release(ep->dst);
2256 cxgb4_l2t_release(ep->l2t);
2257 c4iw_put_ep(&ep->com);
2262 static int pass_open_rpl(struct c4iw_dev *dev, struct sk_buff *skb)
2264 struct cpl_pass_open_rpl *rpl = cplhdr(skb);
2265 struct tid_info *t = dev->rdev.lldi.tids;
2266 unsigned int stid = GET_TID(rpl);
2267 struct c4iw_listen_ep *ep = lookup_stid(t, stid);
2270 PDBG("%s stid %d lookup failure!\n", __func__, stid);
2273 PDBG("%s ep %p status %d error %d\n", __func__, ep,
2274 rpl->status, status2errno(rpl->status));
2275 c4iw_wake_up(&ep->com.wr_wait, status2errno(rpl->status));
2281 static int close_listsrv_rpl(struct c4iw_dev *dev, struct sk_buff *skb)
2283 struct cpl_close_listsvr_rpl *rpl = cplhdr(skb);
2284 struct tid_info *t = dev->rdev.lldi.tids;
2285 unsigned int stid = GET_TID(rpl);
2286 struct c4iw_listen_ep *ep = lookup_stid(t, stid);
2288 PDBG("%s ep %p\n", __func__, ep);
2289 c4iw_wake_up(&ep->com.wr_wait, status2errno(rpl->status));
2293 static int accept_cr(struct c4iw_ep *ep, struct sk_buff *skb,
2294 struct cpl_pass_accept_req *req)
2296 struct cpl_pass_accept_rpl *rpl;
2297 unsigned int mtu_idx;
2301 struct cpl_t5_pass_accept_rpl *rpl5 = NULL;
2303 enum chip_type adapter_type = ep->com.dev->rdev.lldi.adapter_type;
2305 PDBG("%s ep %p tid %u\n", __func__, ep, ep->hwtid);
2306 BUG_ON(skb_cloned(skb));
2310 if (!is_t4(adapter_type)) {
2311 skb_trim(skb, roundup(sizeof(*rpl5), 16));
2313 INIT_TP_WR(rpl5, ep->hwtid);
2315 skb_trim(skb, sizeof(*rpl));
2316 INIT_TP_WR(rpl, ep->hwtid);
2318 OPCODE_TID(rpl) = cpu_to_be32(MK_OPCODE_TID(CPL_PASS_ACCEPT_RPL,
2321 best_mtu(ep->com.dev->rdev.lldi.mtus, ep->mtu, &mtu_idx,
2322 enable_tcp_timestamps && req->tcpopt.tstamp,
2323 (AF_INET == ep->com.remote_addr.ss_family) ? 0 : 1);
2324 wscale = compute_wscale(rcv_win);
2327 * Specify the largest window that will fit in opt0. The
2328 * remainder will be specified in the rx_data_ack.
2330 win = ep->rcv_win >> 10;
2331 if (win > RCV_BUFSIZ_M)
2333 opt0 = (nocong ? NO_CONG_F : 0) |
2336 WND_SCALE_V(wscale) |
2337 MSS_IDX_V(mtu_idx) |
2338 L2T_IDX_V(ep->l2t->idx) |
2339 TX_CHAN_V(ep->tx_chan) |
2340 SMAC_SEL_V(ep->smac_idx) |
2341 DSCP_V(ep->tos >> 2) |
2342 ULP_MODE_V(ULP_MODE_TCPDDP) |
2344 opt2 = RX_CHANNEL_V(0) |
2345 RSS_QUEUE_VALID_F | RSS_QUEUE_V(ep->rss_qid);
2347 if (enable_tcp_timestamps && req->tcpopt.tstamp)
2348 opt2 |= TSTAMPS_EN_F;
2349 if (enable_tcp_sack && req->tcpopt.sack)
2351 if (wscale && enable_tcp_window_scaling)
2352 opt2 |= WND_SCALE_EN_F;
2354 const struct tcphdr *tcph;
2355 u32 hlen = ntohl(req->hdr_len);
2357 if (CHELSIO_CHIP_VERSION(adapter_type) <= CHELSIO_T5)
2358 tcph = (const void *)(req + 1) + ETH_HDR_LEN_G(hlen) +
2361 tcph = (const void *)(req + 1) +
2362 T6_ETH_HDR_LEN_G(hlen) + T6_IP_HDR_LEN_G(hlen);
2363 if (tcph->ece && tcph->cwr)
2364 opt2 |= CCTRL_ECN_V(1);
2366 if (CHELSIO_CHIP_VERSION(adapter_type) > CHELSIO_T4) {
2367 u32 isn = (prandom_u32() & ~7UL) - 1;
2368 opt2 |= T5_OPT_2_VALID_F;
2369 opt2 |= CONG_CNTRL_V(CONG_ALG_TAHOE);
2372 memset(&rpl5->iss, 0, roundup(sizeof(*rpl5)-sizeof(*rpl), 16));
2375 rpl5->iss = cpu_to_be32(isn);
2376 PDBG("%s iss %u\n", __func__, be32_to_cpu(rpl5->iss));
2379 rpl->opt0 = cpu_to_be64(opt0);
2380 rpl->opt2 = cpu_to_be32(opt2);
2381 set_wr_txq(skb, CPL_PRIORITY_SETUP, ep->ctrlq_idx);
2382 t4_set_arp_err_handler(skb, ep, pass_accept_rpl_arp_failure);
2384 return c4iw_l2t_send(&ep->com.dev->rdev, skb, ep->l2t);
2387 static void reject_cr(struct c4iw_dev *dev, u32 hwtid, struct sk_buff *skb)
2389 PDBG("%s c4iw_dev %p tid %u\n", __func__, dev, hwtid);
2390 BUG_ON(skb_cloned(skb));
2391 skb_trim(skb, sizeof(struct cpl_tid_release));
2392 release_tid(&dev->rdev, hwtid, skb);
2396 static void get_4tuple(struct cpl_pass_accept_req *req, enum chip_type type,
2397 int *iptype, __u8 *local_ip, __u8 *peer_ip,
2398 __be16 *local_port, __be16 *peer_port)
2400 int eth_len = (CHELSIO_CHIP_VERSION(type) <= CHELSIO_T5) ?
2401 ETH_HDR_LEN_G(be32_to_cpu(req->hdr_len)) :
2402 T6_ETH_HDR_LEN_G(be32_to_cpu(req->hdr_len));
2403 int ip_len = (CHELSIO_CHIP_VERSION(type) <= CHELSIO_T5) ?
2404 IP_HDR_LEN_G(be32_to_cpu(req->hdr_len)) :
2405 T6_IP_HDR_LEN_G(be32_to_cpu(req->hdr_len));
2406 struct iphdr *ip = (struct iphdr *)((u8 *)(req + 1) + eth_len);
2407 struct ipv6hdr *ip6 = (struct ipv6hdr *)((u8 *)(req + 1) + eth_len);
2408 struct tcphdr *tcp = (struct tcphdr *)
2409 ((u8 *)(req + 1) + eth_len + ip_len);
2411 if (ip->version == 4) {
2412 PDBG("%s saddr 0x%x daddr 0x%x sport %u dport %u\n", __func__,
2413 ntohl(ip->saddr), ntohl(ip->daddr), ntohs(tcp->source),
2416 memcpy(peer_ip, &ip->saddr, 4);
2417 memcpy(local_ip, &ip->daddr, 4);
2419 PDBG("%s saddr %pI6 daddr %pI6 sport %u dport %u\n", __func__,
2420 ip6->saddr.s6_addr, ip6->daddr.s6_addr, ntohs(tcp->source),
2423 memcpy(peer_ip, ip6->saddr.s6_addr, 16);
2424 memcpy(local_ip, ip6->daddr.s6_addr, 16);
2426 *peer_port = tcp->source;
2427 *local_port = tcp->dest;
2432 static int pass_accept_req(struct c4iw_dev *dev, struct sk_buff *skb)
2434 struct c4iw_ep *child_ep = NULL, *parent_ep;
2435 struct cpl_pass_accept_req *req = cplhdr(skb);
2436 unsigned int stid = PASS_OPEN_TID_G(ntohl(req->tos_stid));
2437 struct tid_info *t = dev->rdev.lldi.tids;
2438 unsigned int hwtid = GET_TID(req);
2439 struct dst_entry *dst;
2440 __u8 local_ip[16], peer_ip[16];
2441 __be16 local_port, peer_port;
2442 struct sockaddr_in6 *sin6;
2444 u16 peer_mss = ntohs(req->tcpopt.mss);
2446 unsigned short hdrs;
2447 u8 tos = PASS_OPEN_TOS_G(ntohl(req->tos_stid));
2449 parent_ep = lookup_stid(t, stid);
2451 PDBG("%s connect request on invalid stid %d\n", __func__, stid);
2455 if (state_read(&parent_ep->com) != LISTEN) {
2456 PDBG("%s - listening ep not in LISTEN\n", __func__);
2460 get_4tuple(req, parent_ep->com.dev->rdev.lldi.adapter_type, &iptype,
2461 local_ip, peer_ip, &local_port, &peer_port);
2463 /* Find output route */
2465 PDBG("%s parent ep %p hwtid %u laddr %pI4 raddr %pI4 lport %d rport %d peer_mss %d\n"
2466 , __func__, parent_ep, hwtid,
2467 local_ip, peer_ip, ntohs(local_port),
2468 ntohs(peer_port), peer_mss);
2469 dst = find_route(dev, *(__be32 *)local_ip, *(__be32 *)peer_ip,
2470 local_port, peer_port,
2473 PDBG("%s parent ep %p hwtid %u laddr %pI6 raddr %pI6 lport %d rport %d peer_mss %d\n"
2474 , __func__, parent_ep, hwtid,
2475 local_ip, peer_ip, ntohs(local_port),
2476 ntohs(peer_port), peer_mss);
2477 dst = find_route6(dev, local_ip, peer_ip, local_port, peer_port,
2478 PASS_OPEN_TOS_G(ntohl(req->tos_stid)),
2479 ((struct sockaddr_in6 *)
2480 &parent_ep->com.local_addr)->sin6_scope_id);
2483 printk(KERN_ERR MOD "%s - failed to find dst entry!\n",
2488 child_ep = alloc_ep(sizeof(*child_ep), GFP_KERNEL);
2490 printk(KERN_ERR MOD "%s - failed to allocate ep entry!\n",
2496 err = import_ep(child_ep, iptype, peer_ip, dst, dev, false,
2497 parent_ep->com.dev->rdev.lldi.adapter_type, tos);
2499 printk(KERN_ERR MOD "%s - failed to allocate l2t entry!\n",
2506 hdrs = sizeof(struct iphdr) + sizeof(struct tcphdr) +
2507 ((enable_tcp_timestamps && req->tcpopt.tstamp) ? 12 : 0);
2508 if (peer_mss && child_ep->mtu > (peer_mss + hdrs))
2509 child_ep->mtu = peer_mss + hdrs;
2511 state_set(&child_ep->com, CONNECTING);
2512 child_ep->com.dev = dev;
2513 child_ep->com.cm_id = NULL;
2516 struct sockaddr_in *sin = (struct sockaddr_in *)
2517 &child_ep->com.local_addr;
2519 sin->sin_family = PF_INET;
2520 sin->sin_port = local_port;
2521 sin->sin_addr.s_addr = *(__be32 *)local_ip;
2523 sin = (struct sockaddr_in *)&child_ep->com.local_addr;
2524 sin->sin_family = PF_INET;
2525 sin->sin_port = ((struct sockaddr_in *)
2526 &parent_ep->com.local_addr)->sin_port;
2527 sin->sin_addr.s_addr = *(__be32 *)local_ip;
2529 sin = (struct sockaddr_in *)&child_ep->com.remote_addr;
2530 sin->sin_family = PF_INET;
2531 sin->sin_port = peer_port;
2532 sin->sin_addr.s_addr = *(__be32 *)peer_ip;
2534 sin6 = (struct sockaddr_in6 *)&child_ep->com.local_addr;
2535 sin6->sin6_family = PF_INET6;
2536 sin6->sin6_port = local_port;
2537 memcpy(sin6->sin6_addr.s6_addr, local_ip, 16);
2539 sin6 = (struct sockaddr_in6 *)&child_ep->com.local_addr;
2540 sin6->sin6_family = PF_INET6;
2541 sin6->sin6_port = ((struct sockaddr_in6 *)
2542 &parent_ep->com.local_addr)->sin6_port;
2543 memcpy(sin6->sin6_addr.s6_addr, local_ip, 16);
2545 sin6 = (struct sockaddr_in6 *)&child_ep->com.remote_addr;
2546 sin6->sin6_family = PF_INET6;
2547 sin6->sin6_port = peer_port;
2548 memcpy(sin6->sin6_addr.s6_addr, peer_ip, 16);
2551 c4iw_get_ep(&parent_ep->com);
2552 child_ep->parent_ep = parent_ep;
2553 child_ep->tos = tos;
2554 child_ep->dst = dst;
2555 child_ep->hwtid = hwtid;
2557 PDBG("%s tx_chan %u smac_idx %u rss_qid %u\n", __func__,
2558 child_ep->tx_chan, child_ep->smac_idx, child_ep->rss_qid);
2560 init_timer(&child_ep->timer);
2561 cxgb4_insert_tid(t, child_ep, hwtid);
2562 insert_handle(dev, &dev->hwtid_idr, child_ep, child_ep->hwtid);
2563 if (accept_cr(child_ep, skb, req)) {
2564 c4iw_put_ep(&parent_ep->com);
2565 release_ep_resources(child_ep);
2567 set_bit(PASS_ACCEPT_REQ, &child_ep->com.history);
2570 sin6 = (struct sockaddr_in6 *)&child_ep->com.local_addr;
2571 cxgb4_clip_get(child_ep->com.dev->rdev.lldi.ports[0],
2572 (const u32 *)&sin6->sin6_addr.s6_addr, 1);
2576 reject_cr(dev, hwtid, skb);
2581 static int pass_establish(struct c4iw_dev *dev, struct sk_buff *skb)
2584 struct cpl_pass_establish *req = cplhdr(skb);
2585 struct tid_info *t = dev->rdev.lldi.tids;
2586 unsigned int tid = GET_TID(req);
2589 ep = lookup_tid(t, tid);
2590 PDBG("%s ep %p tid %u\n", __func__, ep, ep->hwtid);
2591 ep->snd_seq = be32_to_cpu(req->snd_isn);
2592 ep->rcv_seq = be32_to_cpu(req->rcv_isn);
2594 PDBG("%s ep %p hwtid %u tcp_opt 0x%02x\n", __func__, ep, tid,
2595 ntohs(req->tcp_opt));
2597 set_emss(ep, ntohs(req->tcp_opt));
2599 dst_confirm(ep->dst);
2600 mutex_lock(&ep->com.mutex);
2601 ep->com.state = MPA_REQ_WAIT;
2603 set_bit(PASS_ESTAB, &ep->com.history);
2604 ret = send_flowc(ep, skb);
2605 mutex_unlock(&ep->com.mutex);
2607 c4iw_ep_disconnect(ep, 1, GFP_KERNEL);
2612 static int peer_close(struct c4iw_dev *dev, struct sk_buff *skb)
2614 struct cpl_peer_close *hdr = cplhdr(skb);
2616 struct c4iw_qp_attributes attrs;
2619 struct tid_info *t = dev->rdev.lldi.tids;
2620 unsigned int tid = GET_TID(hdr);
2623 ep = lookup_tid(t, tid);
2624 PDBG("%s ep %p tid %u\n", __func__, ep, ep->hwtid);
2625 dst_confirm(ep->dst);
2627 set_bit(PEER_CLOSE, &ep->com.history);
2628 mutex_lock(&ep->com.mutex);
2629 switch (ep->com.state) {
2631 __state_set(&ep->com, CLOSING);
2634 __state_set(&ep->com, CLOSING);
2635 connect_reply_upcall(ep, -ECONNRESET);
2640 * We're gonna mark this puppy DEAD, but keep
2641 * the reference on it until the ULP accepts or
2642 * rejects the CR. Also wake up anyone waiting
2643 * in rdma connection migration (see c4iw_accept_cr()).
2645 __state_set(&ep->com, CLOSING);
2646 PDBG("waking up ep %p tid %u\n", ep, ep->hwtid);
2647 c4iw_wake_up(&ep->com.wr_wait, -ECONNRESET);
2650 __state_set(&ep->com, CLOSING);
2651 PDBG("waking up ep %p tid %u\n", ep, ep->hwtid);
2652 c4iw_wake_up(&ep->com.wr_wait, -ECONNRESET);
2656 __state_set(&ep->com, CLOSING);
2657 attrs.next_state = C4IW_QP_STATE_CLOSING;
2658 ret = c4iw_modify_qp(ep->com.qp->rhp, ep->com.qp,
2659 C4IW_QP_ATTR_NEXT_STATE, &attrs, 1);
2660 if (ret != -ECONNRESET) {
2661 peer_close_upcall(ep);
2669 __state_set(&ep->com, MORIBUND);
2673 (void)stop_ep_timer(ep);
2674 if (ep->com.cm_id && ep->com.qp) {
2675 attrs.next_state = C4IW_QP_STATE_IDLE;
2676 c4iw_modify_qp(ep->com.qp->rhp, ep->com.qp,
2677 C4IW_QP_ATTR_NEXT_STATE, &attrs, 1);
2679 close_complete_upcall(ep, 0);
2680 __state_set(&ep->com, DEAD);
2690 mutex_unlock(&ep->com.mutex);
2692 c4iw_ep_disconnect(ep, 0, GFP_KERNEL);
2694 release_ep_resources(ep);
2698 static int peer_abort(struct c4iw_dev *dev, struct sk_buff *skb)
2700 struct cpl_abort_req_rss *req = cplhdr(skb);
2702 struct cpl_abort_rpl *rpl;
2703 struct sk_buff *rpl_skb;
2704 struct c4iw_qp_attributes attrs;
2707 struct tid_info *t = dev->rdev.lldi.tids;
2708 unsigned int tid = GET_TID(req);
2710 ep = lookup_tid(t, tid);
2711 if (is_neg_adv(req->status)) {
2712 PDBG("%s Negative advice on abort- tid %u status %d (%s)\n",
2713 __func__, ep->hwtid, req->status,
2714 neg_adv_str(req->status));
2715 ep->stats.abort_neg_adv++;
2716 mutex_lock(&dev->rdev.stats.lock);
2717 dev->rdev.stats.neg_adv++;
2718 mutex_unlock(&dev->rdev.stats.lock);
2721 PDBG("%s ep %p tid %u state %u\n", __func__, ep, ep->hwtid,
2723 set_bit(PEER_ABORT, &ep->com.history);
2726 * Wake up any threads in rdma_init() or rdma_fini().
2727 * However, this is not needed if com state is just
2730 if (ep->com.state != MPA_REQ_SENT)
2731 c4iw_wake_up(&ep->com.wr_wait, -ECONNRESET);
2733 mutex_lock(&ep->com.mutex);
2734 switch (ep->com.state) {
2736 c4iw_put_ep(&ep->parent_ep->com);
2739 (void)stop_ep_timer(ep);
2742 (void)stop_ep_timer(ep);
2743 if (mpa_rev == 1 || (mpa_rev == 2 && ep->tried_with_mpa_v1))
2744 connect_reply_upcall(ep, -ECONNRESET);
2747 * we just don't send notification upwards because we
2748 * want to retry with mpa_v1 without upper layers even
2751 * do some housekeeping so as to re-initiate the
2754 PDBG("%s: mpa_rev=%d. Retrying with mpav1\n", __func__,
2756 ep->retry_with_mpa_v1 = 1;
2768 if (ep->com.cm_id && ep->com.qp) {
2769 attrs.next_state = C4IW_QP_STATE_ERROR;
2770 ret = c4iw_modify_qp(ep->com.qp->rhp,
2771 ep->com.qp, C4IW_QP_ATTR_NEXT_STATE,
2775 "%s - qp <- error failed!\n",
2778 peer_abort_upcall(ep);
2783 PDBG("%s PEER_ABORT IN DEAD STATE!!!!\n", __func__);
2784 mutex_unlock(&ep->com.mutex);
2790 dst_confirm(ep->dst);
2791 if (ep->com.state != ABORTING) {
2792 __state_set(&ep->com, DEAD);
2793 /* we don't release if we want to retry with mpa_v1 */
2794 if (!ep->retry_with_mpa_v1)
2797 mutex_unlock(&ep->com.mutex);
2799 rpl_skb = get_skb(skb, sizeof(*rpl), GFP_KERNEL);
2801 printk(KERN_ERR MOD "%s - cannot allocate skb!\n",
2806 set_wr_txq(skb, CPL_PRIORITY_DATA, ep->txq_idx);
2807 rpl = (struct cpl_abort_rpl *) skb_put(rpl_skb, sizeof(*rpl));
2808 INIT_TP_WR(rpl, ep->hwtid);
2809 OPCODE_TID(rpl) = cpu_to_be32(MK_OPCODE_TID(CPL_ABORT_RPL, ep->hwtid));
2810 rpl->cmd = CPL_ABORT_NO_RST;
2811 c4iw_ofld_send(&ep->com.dev->rdev, rpl_skb);
2814 release_ep_resources(ep);
2815 else if (ep->retry_with_mpa_v1) {
2816 if (ep->com.remote_addr.ss_family == AF_INET6) {
2817 struct sockaddr_in6 *sin6 =
2818 (struct sockaddr_in6 *)
2819 &ep->com.local_addr;
2821 ep->com.dev->rdev.lldi.ports[0],
2822 (const u32 *)&sin6->sin6_addr.s6_addr,
2825 remove_handle(ep->com.dev, &ep->com.dev->hwtid_idr, ep->hwtid);
2826 cxgb4_remove_tid(ep->com.dev->rdev.lldi.tids, 0, ep->hwtid);
2827 dst_release(ep->dst);
2828 cxgb4_l2t_release(ep->l2t);
2835 static int close_con_rpl(struct c4iw_dev *dev, struct sk_buff *skb)
2838 struct c4iw_qp_attributes attrs;
2839 struct cpl_close_con_rpl *rpl = cplhdr(skb);
2841 struct tid_info *t = dev->rdev.lldi.tids;
2842 unsigned int tid = GET_TID(rpl);
2844 ep = lookup_tid(t, tid);
2846 PDBG("%s ep %p tid %u\n", __func__, ep, ep->hwtid);
2849 /* The cm_id may be null if we failed to connect */
2850 mutex_lock(&ep->com.mutex);
2851 set_bit(CLOSE_CON_RPL, &ep->com.history);
2852 switch (ep->com.state) {
2854 __state_set(&ep->com, MORIBUND);
2857 (void)stop_ep_timer(ep);
2858 if ((ep->com.cm_id) && (ep->com.qp)) {
2859 attrs.next_state = C4IW_QP_STATE_IDLE;
2860 c4iw_modify_qp(ep->com.qp->rhp,
2862 C4IW_QP_ATTR_NEXT_STATE,
2865 close_complete_upcall(ep, 0);
2866 __state_set(&ep->com, DEAD);
2876 mutex_unlock(&ep->com.mutex);
2878 release_ep_resources(ep);
2882 static int terminate(struct c4iw_dev *dev, struct sk_buff *skb)
2884 struct cpl_rdma_terminate *rpl = cplhdr(skb);
2885 struct tid_info *t = dev->rdev.lldi.tids;
2886 unsigned int tid = GET_TID(rpl);
2888 struct c4iw_qp_attributes attrs;
2890 ep = lookup_tid(t, tid);
2893 if (ep && ep->com.qp) {
2894 printk(KERN_WARNING MOD "TERM received tid %u qpid %u\n", tid,
2895 ep->com.qp->wq.sq.qid);
2896 attrs.next_state = C4IW_QP_STATE_TERMINATE;
2897 c4iw_modify_qp(ep->com.qp->rhp, ep->com.qp,
2898 C4IW_QP_ATTR_NEXT_STATE, &attrs, 1);
2900 printk(KERN_WARNING MOD "TERM received tid %u no ep/qp\n", tid);
2906 * Upcall from the adapter indicating data has been transmitted.
2907 * For us its just the single MPA request or reply. We can now free
2908 * the skb holding the mpa message.
2910 static int fw4_ack(struct c4iw_dev *dev, struct sk_buff *skb)
2913 struct cpl_fw4_ack *hdr = cplhdr(skb);
2914 u8 credits = hdr->credits;
2915 unsigned int tid = GET_TID(hdr);
2916 struct tid_info *t = dev->rdev.lldi.tids;
2919 ep = lookup_tid(t, tid);
2920 PDBG("%s ep %p tid %u credits %u\n", __func__, ep, ep->hwtid, credits);
2922 PDBG("%s 0 credit ack ep %p tid %u state %u\n",
2923 __func__, ep, ep->hwtid, state_read(&ep->com));
2927 dst_confirm(ep->dst);
2929 PDBG("%s last streaming msg ack ep %p tid %u state %u "
2930 "initiator %u freeing skb\n", __func__, ep, ep->hwtid,
2931 state_read(&ep->com), ep->mpa_attr.initiator ? 1 : 0);
2932 kfree_skb(ep->mpa_skb);
2934 mutex_lock(&ep->com.mutex);
2935 if (test_bit(STOP_MPA_TIMER, &ep->com.flags))
2937 mutex_unlock(&ep->com.mutex);
2942 int c4iw_reject_cr(struct iw_cm_id *cm_id, const void *pdata, u8 pdata_len)
2946 struct c4iw_ep *ep = to_ep(cm_id);
2947 PDBG("%s ep %p tid %u\n", __func__, ep, ep->hwtid);
2949 mutex_lock(&ep->com.mutex);
2950 if (ep->com.state == DEAD) {
2951 mutex_unlock(&ep->com.mutex);
2952 c4iw_put_ep(&ep->com);
2955 set_bit(ULP_REJECT, &ep->com.history);
2956 BUG_ON(ep->com.state != MPA_REQ_RCVD);
2960 err = send_mpa_reject(ep, pdata, pdata_len);
2963 mutex_unlock(&ep->com.mutex);
2966 err = c4iw_ep_disconnect(ep, disconnect == 2, GFP_KERNEL);
2968 c4iw_put_ep(&ep->com);
2972 int c4iw_accept_cr(struct iw_cm_id *cm_id, struct iw_cm_conn_param *conn_param)
2975 struct c4iw_qp_attributes attrs;
2976 enum c4iw_qp_attr_mask mask;
2977 struct c4iw_ep *ep = to_ep(cm_id);
2978 struct c4iw_dev *h = to_c4iw_dev(cm_id->device);
2979 struct c4iw_qp *qp = get_qhp(h, conn_param->qpn);
2982 PDBG("%s ep %p tid %u\n", __func__, ep, ep->hwtid);
2984 mutex_lock(&ep->com.mutex);
2985 if (ep->com.state == DEAD) {
2990 BUG_ON(ep->com.state != MPA_REQ_RCVD);
2993 set_bit(ULP_ACCEPT, &ep->com.history);
2994 if ((conn_param->ord > cur_max_read_depth(ep->com.dev)) ||
2995 (conn_param->ird > cur_max_read_depth(ep->com.dev))) {
3000 if (ep->mpa_attr.version == 2 && ep->mpa_attr.enhanced_rdma_conn) {
3001 if (conn_param->ord > ep->ird) {
3002 if (RELAXED_IRD_NEGOTIATION) {
3005 ep->ird = conn_param->ird;
3006 ep->ord = conn_param->ord;
3007 send_mpa_reject(ep, conn_param->private_data,
3008 conn_param->private_data_len);
3013 if (conn_param->ird < ep->ord) {
3014 if (RELAXED_IRD_NEGOTIATION &&
3015 ep->ord <= h->rdev.lldi.max_ordird_qp) {
3016 conn_param->ird = ep->ord;
3023 ep->ird = conn_param->ird;
3024 ep->ord = conn_param->ord;
3026 if (ep->mpa_attr.version == 1) {
3027 if (peer2peer && ep->ird == 0)
3031 (ep->mpa_attr.p2p_type != FW_RI_INIT_P2PTYPE_DISABLED) &&
3032 (p2p_type == FW_RI_INIT_P2PTYPE_READ_REQ) && ep->ird == 0)
3036 PDBG("%s %d ird %d ord %d\n", __func__, __LINE__, ep->ird, ep->ord);
3038 ep->com.cm_id = cm_id;
3039 ref_cm_id(&ep->com);
3043 /* bind QP to EP and move to RTS */
3044 attrs.mpa_attr = ep->mpa_attr;
3045 attrs.max_ird = ep->ird;
3046 attrs.max_ord = ep->ord;
3047 attrs.llp_stream_handle = ep;
3048 attrs.next_state = C4IW_QP_STATE_RTS;
3050 /* bind QP and TID with INIT_WR */
3051 mask = C4IW_QP_ATTR_NEXT_STATE |
3052 C4IW_QP_ATTR_LLP_STREAM_HANDLE |
3053 C4IW_QP_ATTR_MPA_ATTR |
3054 C4IW_QP_ATTR_MAX_IRD |
3055 C4IW_QP_ATTR_MAX_ORD;
3057 err = c4iw_modify_qp(ep->com.qp->rhp,
3058 ep->com.qp, mask, &attrs, 1);
3060 goto err_deref_cm_id;
3062 set_bit(STOP_MPA_TIMER, &ep->com.flags);
3063 err = send_mpa_reply(ep, conn_param->private_data,
3064 conn_param->private_data_len);
3066 goto err_deref_cm_id;
3068 __state_set(&ep->com, FPDU_MODE);
3069 established_upcall(ep);
3070 mutex_unlock(&ep->com.mutex);
3071 c4iw_put_ep(&ep->com);
3074 deref_cm_id(&ep->com);
3078 mutex_unlock(&ep->com.mutex);
3080 c4iw_ep_disconnect(ep, 1, GFP_KERNEL);
3081 c4iw_put_ep(&ep->com);
3085 static int pick_local_ipaddrs(struct c4iw_dev *dev, struct iw_cm_id *cm_id)
3087 struct in_device *ind;
3089 struct sockaddr_in *laddr = (struct sockaddr_in *)&cm_id->m_local_addr;
3090 struct sockaddr_in *raddr = (struct sockaddr_in *)&cm_id->m_remote_addr;
3092 ind = in_dev_get(dev->rdev.lldi.ports[0]);
3094 return -EADDRNOTAVAIL;
3095 for_primary_ifa(ind) {
3096 laddr->sin_addr.s_addr = ifa->ifa_address;
3097 raddr->sin_addr.s_addr = ifa->ifa_address;
3103 return found ? 0 : -EADDRNOTAVAIL;
3106 static int get_lladdr(struct net_device *dev, struct in6_addr *addr,
3107 unsigned char banned_flags)
3109 struct inet6_dev *idev;
3110 int err = -EADDRNOTAVAIL;
3113 idev = __in6_dev_get(dev);
3115 struct inet6_ifaddr *ifp;
3117 read_lock_bh(&idev->lock);
3118 list_for_each_entry(ifp, &idev->addr_list, if_list) {
3119 if (ifp->scope == IFA_LINK &&
3120 !(ifp->flags & banned_flags)) {
3121 memcpy(addr, &ifp->addr, 16);
3126 read_unlock_bh(&idev->lock);
3132 static int pick_local_ip6addrs(struct c4iw_dev *dev, struct iw_cm_id *cm_id)
3134 struct in6_addr uninitialized_var(addr);
3135 struct sockaddr_in6 *la6 = (struct sockaddr_in6 *)&cm_id->m_local_addr;
3136 struct sockaddr_in6 *ra6 = (struct sockaddr_in6 *)&cm_id->m_remote_addr;
3138 if (!get_lladdr(dev->rdev.lldi.ports[0], &addr, IFA_F_TENTATIVE)) {
3139 memcpy(la6->sin6_addr.s6_addr, &addr, 16);
3140 memcpy(ra6->sin6_addr.s6_addr, &addr, 16);
3143 return -EADDRNOTAVAIL;
3146 int c4iw_connect(struct iw_cm_id *cm_id, struct iw_cm_conn_param *conn_param)
3148 struct c4iw_dev *dev = to_c4iw_dev(cm_id->device);
3151 struct sockaddr_in *laddr;
3152 struct sockaddr_in *raddr;
3153 struct sockaddr_in6 *laddr6;
3154 struct sockaddr_in6 *raddr6;
3158 if ((conn_param->ord > cur_max_read_depth(dev)) ||
3159 (conn_param->ird > cur_max_read_depth(dev))) {
3163 ep = alloc_ep(sizeof(*ep), GFP_KERNEL);
3165 printk(KERN_ERR MOD "%s - cannot alloc ep.\n", __func__);
3169 init_timer(&ep->timer);
3170 ep->plen = conn_param->private_data_len;
3172 memcpy(ep->mpa_pkt + sizeof(struct mpa_message),
3173 conn_param->private_data, ep->plen);
3174 ep->ird = conn_param->ird;
3175 ep->ord = conn_param->ord;
3177 if (peer2peer && ep->ord == 0)
3180 ep->com.cm_id = cm_id;
3181 ref_cm_id(&ep->com);
3183 ep->com.qp = get_qhp(dev, conn_param->qpn);
3185 PDBG("%s qpn 0x%x not found!\n", __func__, conn_param->qpn);
3190 PDBG("%s qpn 0x%x qp %p cm_id %p\n", __func__, conn_param->qpn,
3194 * Allocate an active TID to initiate a TCP connection.
3196 ep->atid = cxgb4_alloc_atid(dev->rdev.lldi.tids, ep);
3197 if (ep->atid == -1) {
3198 printk(KERN_ERR MOD "%s - cannot alloc atid.\n", __func__);
3202 insert_handle(dev, &dev->atid_idr, ep, ep->atid);
3204 memcpy(&ep->com.local_addr, &cm_id->m_local_addr,
3205 sizeof(ep->com.local_addr));
3206 memcpy(&ep->com.remote_addr, &cm_id->m_remote_addr,
3207 sizeof(ep->com.remote_addr));
3209 laddr = (struct sockaddr_in *)&ep->com.local_addr;
3210 raddr = (struct sockaddr_in *)&ep->com.remote_addr;
3211 laddr6 = (struct sockaddr_in6 *)&ep->com.local_addr;
3212 raddr6 = (struct sockaddr_in6 *) &ep->com.remote_addr;
3214 if (cm_id->m_remote_addr.ss_family == AF_INET) {
3216 ra = (__u8 *)&raddr->sin_addr;
3219 * Handle loopback requests to INADDR_ANY.
3221 if ((__force int)raddr->sin_addr.s_addr == INADDR_ANY) {
3222 err = pick_local_ipaddrs(dev, cm_id);
3228 PDBG("%s saddr %pI4 sport 0x%x raddr %pI4 rport 0x%x\n",
3229 __func__, &laddr->sin_addr, ntohs(laddr->sin_port),
3230 ra, ntohs(raddr->sin_port));
3231 ep->dst = find_route(dev, laddr->sin_addr.s_addr,
3232 raddr->sin_addr.s_addr, laddr->sin_port,
3233 raddr->sin_port, cm_id->tos);
3236 ra = (__u8 *)&raddr6->sin6_addr;
3239 * Handle loopback requests to INADDR_ANY.
3241 if (ipv6_addr_type(&raddr6->sin6_addr) == IPV6_ADDR_ANY) {
3242 err = pick_local_ip6addrs(dev, cm_id);
3248 PDBG("%s saddr %pI6 sport 0x%x raddr %pI6 rport 0x%x\n",
3249 __func__, laddr6->sin6_addr.s6_addr,
3250 ntohs(laddr6->sin6_port),
3251 raddr6->sin6_addr.s6_addr, ntohs(raddr6->sin6_port));
3252 ep->dst = find_route6(dev, laddr6->sin6_addr.s6_addr,
3253 raddr6->sin6_addr.s6_addr,
3254 laddr6->sin6_port, raddr6->sin6_port, 0,
3255 raddr6->sin6_scope_id);
3258 printk(KERN_ERR MOD "%s - cannot find route.\n", __func__);
3259 err = -EHOSTUNREACH;
3263 err = import_ep(ep, iptype, ra, ep->dst, ep->com.dev, true,
3264 ep->com.dev->rdev.lldi.adapter_type, cm_id->tos);
3266 printk(KERN_ERR MOD "%s - cannot alloc l2e.\n", __func__);
3270 PDBG("%s txq_idx %u tx_chan %u smac_idx %u rss_qid %u l2t_idx %u\n",
3271 __func__, ep->txq_idx, ep->tx_chan, ep->smac_idx, ep->rss_qid,
3274 state_set(&ep->com, CONNECTING);
3275 ep->tos = cm_id->tos;
3277 /* send connect request to rnic */
3278 err = send_connect(ep);
3282 cxgb4_l2t_release(ep->l2t);
3284 dst_release(ep->dst);
3286 remove_handle(ep->com.dev, &ep->com.dev->atid_idr, ep->atid);
3287 cxgb4_free_atid(ep->com.dev->rdev.lldi.tids, ep->atid);
3289 deref_cm_id(&ep->com);
3290 c4iw_put_ep(&ep->com);
3295 static int create_server6(struct c4iw_dev *dev, struct c4iw_listen_ep *ep)
3298 struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *)
3299 &ep->com.local_addr;
3301 if (ipv6_addr_type(&sin6->sin6_addr) != IPV6_ADDR_ANY) {
3302 err = cxgb4_clip_get(ep->com.dev->rdev.lldi.ports[0],
3303 (const u32 *)&sin6->sin6_addr.s6_addr, 1);
3307 c4iw_init_wr_wait(&ep->com.wr_wait);
3308 err = cxgb4_create_server6(ep->com.dev->rdev.lldi.ports[0],
3309 ep->stid, &sin6->sin6_addr,
3311 ep->com.dev->rdev.lldi.rxq_ids[0]);
3313 err = c4iw_wait_for_reply(&ep->com.dev->rdev,
3317 err = net_xmit_errno(err);
3319 cxgb4_clip_release(ep->com.dev->rdev.lldi.ports[0],
3320 (const u32 *)&sin6->sin6_addr.s6_addr, 1);
3321 pr_err("cxgb4_create_server6/filter failed err %d stid %d laddr %pI6 lport %d\n",
3323 sin6->sin6_addr.s6_addr, ntohs(sin6->sin6_port));
3328 static int create_server4(struct c4iw_dev *dev, struct c4iw_listen_ep *ep)
3331 struct sockaddr_in *sin = (struct sockaddr_in *)
3332 &ep->com.local_addr;
3334 if (dev->rdev.lldi.enable_fw_ofld_conn) {
3336 err = cxgb4_create_server_filter(
3337 ep->com.dev->rdev.lldi.ports[0], ep->stid,
3338 sin->sin_addr.s_addr, sin->sin_port, 0,
3339 ep->com.dev->rdev.lldi.rxq_ids[0], 0, 0);
3340 if (err == -EBUSY) {
3341 if (c4iw_fatal_error(&ep->com.dev->rdev)) {
3345 set_current_state(TASK_UNINTERRUPTIBLE);
3346 schedule_timeout(usecs_to_jiffies(100));
3348 } while (err == -EBUSY);
3350 c4iw_init_wr_wait(&ep->com.wr_wait);
3351 err = cxgb4_create_server(ep->com.dev->rdev.lldi.ports[0],
3352 ep->stid, sin->sin_addr.s_addr, sin->sin_port,
3353 0, ep->com.dev->rdev.lldi.rxq_ids[0]);
3355 err = c4iw_wait_for_reply(&ep->com.dev->rdev,
3359 err = net_xmit_errno(err);
3362 pr_err("cxgb4_create_server/filter failed err %d stid %d laddr %pI4 lport %d\n"
3364 &sin->sin_addr, ntohs(sin->sin_port));
3368 int c4iw_create_listen(struct iw_cm_id *cm_id, int backlog)
3371 struct c4iw_dev *dev = to_c4iw_dev(cm_id->device);
3372 struct c4iw_listen_ep *ep;
3376 ep = alloc_ep(sizeof(*ep), GFP_KERNEL);
3378 printk(KERN_ERR MOD "%s - cannot alloc ep.\n", __func__);
3382 PDBG("%s ep %p\n", __func__, ep);
3383 ep->com.cm_id = cm_id;
3384 ref_cm_id(&ep->com);
3386 ep->backlog = backlog;
3387 memcpy(&ep->com.local_addr, &cm_id->m_local_addr,
3388 sizeof(ep->com.local_addr));
3391 * Allocate a server TID.
3393 if (dev->rdev.lldi.enable_fw_ofld_conn &&
3394 ep->com.local_addr.ss_family == AF_INET)
3395 ep->stid = cxgb4_alloc_sftid(dev->rdev.lldi.tids,
3396 cm_id->m_local_addr.ss_family, ep);
3398 ep->stid = cxgb4_alloc_stid(dev->rdev.lldi.tids,
3399 cm_id->m_local_addr.ss_family, ep);
3401 if (ep->stid == -1) {
3402 printk(KERN_ERR MOD "%s - cannot alloc stid.\n", __func__);
3406 insert_handle(dev, &dev->stid_idr, ep, ep->stid);
3408 memcpy(&ep->com.local_addr, &cm_id->m_local_addr,
3409 sizeof(ep->com.local_addr));
3411 state_set(&ep->com, LISTEN);
3412 if (ep->com.local_addr.ss_family == AF_INET)
3413 err = create_server4(dev, ep);
3415 err = create_server6(dev, ep);
3417 cm_id->provider_data = ep;
3421 cxgb4_free_stid(ep->com.dev->rdev.lldi.tids, ep->stid,
3422 ep->com.local_addr.ss_family);
3424 deref_cm_id(&ep->com);
3425 c4iw_put_ep(&ep->com);
3431 int c4iw_destroy_listen(struct iw_cm_id *cm_id)
3434 struct c4iw_listen_ep *ep = to_listen_ep(cm_id);
3436 PDBG("%s ep %p\n", __func__, ep);
3439 state_set(&ep->com, DEAD);
3440 if (ep->com.dev->rdev.lldi.enable_fw_ofld_conn &&
3441 ep->com.local_addr.ss_family == AF_INET) {
3442 err = cxgb4_remove_server_filter(
3443 ep->com.dev->rdev.lldi.ports[0], ep->stid,
3444 ep->com.dev->rdev.lldi.rxq_ids[0], 0);
3446 struct sockaddr_in6 *sin6;
3447 c4iw_init_wr_wait(&ep->com.wr_wait);
3448 err = cxgb4_remove_server(
3449 ep->com.dev->rdev.lldi.ports[0], ep->stid,
3450 ep->com.dev->rdev.lldi.rxq_ids[0], 0);
3453 err = c4iw_wait_for_reply(&ep->com.dev->rdev, &ep->com.wr_wait,
3455 sin6 = (struct sockaddr_in6 *)&ep->com.local_addr;
3456 cxgb4_clip_release(ep->com.dev->rdev.lldi.ports[0],
3457 (const u32 *)&sin6->sin6_addr.s6_addr, 1);
3459 remove_handle(ep->com.dev, &ep->com.dev->stid_idr, ep->stid);
3460 cxgb4_free_stid(ep->com.dev->rdev.lldi.tids, ep->stid,
3461 ep->com.local_addr.ss_family);
3463 deref_cm_id(&ep->com);
3464 c4iw_put_ep(&ep->com);
3468 int c4iw_ep_disconnect(struct c4iw_ep *ep, int abrupt, gfp_t gfp)
3473 struct c4iw_rdev *rdev;
3475 mutex_lock(&ep->com.mutex);
3477 PDBG("%s ep %p state %s, abrupt %d\n", __func__, ep,
3478 states[ep->com.state], abrupt);
3481 * Ref the ep here in case we have fatal errors causing the
3482 * ep to be released and freed.
3484 c4iw_get_ep(&ep->com);
3486 rdev = &ep->com.dev->rdev;
3487 if (c4iw_fatal_error(rdev)) {
3489 close_complete_upcall(ep, -EIO);
3490 ep->com.state = DEAD;
3492 switch (ep->com.state) {
3500 ep->com.state = ABORTING;
3502 ep->com.state = CLOSING;
3505 set_bit(CLOSE_SENT, &ep->com.flags);
3508 if (!test_and_set_bit(CLOSE_SENT, &ep->com.flags)) {
3511 (void)stop_ep_timer(ep);
3512 ep->com.state = ABORTING;
3514 ep->com.state = MORIBUND;
3520 PDBG("%s ignoring disconnect ep %p state %u\n",
3521 __func__, ep, ep->com.state);
3530 set_bit(EP_DISC_ABORT, &ep->com.history);
3531 close_complete_upcall(ep, -ECONNRESET);
3532 ret = send_abort(ep, NULL, gfp);
3534 set_bit(EP_DISC_CLOSE, &ep->com.history);
3535 ret = send_halfclose(ep, gfp);
3538 set_bit(EP_DISC_FAIL, &ep->com.history);
3541 close_complete_upcall(ep, -EIO);
3544 struct c4iw_qp_attributes attrs;
3546 attrs.next_state = C4IW_QP_STATE_ERROR;
3547 ret = c4iw_modify_qp(ep->com.qp->rhp,
3549 C4IW_QP_ATTR_NEXT_STATE,
3553 "%s - qp <- error failed!\n",
3559 mutex_unlock(&ep->com.mutex);
3560 c4iw_put_ep(&ep->com);
3562 release_ep_resources(ep);
3566 static void active_ofld_conn_reply(struct c4iw_dev *dev, struct sk_buff *skb,
3567 struct cpl_fw6_msg_ofld_connection_wr_rpl *req)
3570 int atid = be32_to_cpu(req->tid);
3572 ep = (struct c4iw_ep *)lookup_atid(dev->rdev.lldi.tids,
3573 (__force u32) req->tid);
3577 switch (req->retval) {
3579 set_bit(ACT_RETRY_NOMEM, &ep->com.history);
3580 if (ep->retry_count++ < ACT_OPEN_RETRY_COUNT) {
3581 send_fw_act_open_req(ep, atid);
3585 set_bit(ACT_RETRY_INUSE, &ep->com.history);
3586 if (ep->retry_count++ < ACT_OPEN_RETRY_COUNT) {
3587 send_fw_act_open_req(ep, atid);
3592 pr_info("%s unexpected ofld conn wr retval %d\n",
3593 __func__, req->retval);
3596 pr_err("active ofld_connect_wr failure %d atid %d\n",
3598 mutex_lock(&dev->rdev.stats.lock);
3599 dev->rdev.stats.act_ofld_conn_fails++;
3600 mutex_unlock(&dev->rdev.stats.lock);
3601 connect_reply_upcall(ep, status2errno(req->retval));
3602 state_set(&ep->com, DEAD);
3603 if (ep->com.remote_addr.ss_family == AF_INET6) {
3604 struct sockaddr_in6 *sin6 =
3605 (struct sockaddr_in6 *)&ep->com.local_addr;
3606 cxgb4_clip_release(ep->com.dev->rdev.lldi.ports[0],
3607 (const u32 *)&sin6->sin6_addr.s6_addr, 1);
3609 remove_handle(dev, &dev->atid_idr, atid);
3610 cxgb4_free_atid(dev->rdev.lldi.tids, atid);
3611 dst_release(ep->dst);
3612 cxgb4_l2t_release(ep->l2t);
3613 c4iw_put_ep(&ep->com);
3616 static void passive_ofld_conn_reply(struct c4iw_dev *dev, struct sk_buff *skb,
3617 struct cpl_fw6_msg_ofld_connection_wr_rpl *req)
3619 struct sk_buff *rpl_skb;
3620 struct cpl_pass_accept_req *cpl;
3623 rpl_skb = (struct sk_buff *)(unsigned long)req->cookie;
3626 PDBG("%s passive open failure %d\n", __func__, req->retval);
3627 mutex_lock(&dev->rdev.stats.lock);
3628 dev->rdev.stats.pas_ofld_conn_fails++;
3629 mutex_unlock(&dev->rdev.stats.lock);
3632 cpl = (struct cpl_pass_accept_req *)cplhdr(rpl_skb);
3633 OPCODE_TID(cpl) = htonl(MK_OPCODE_TID(CPL_PASS_ACCEPT_REQ,
3634 (__force u32) htonl(
3635 (__force u32) req->tid)));
3636 ret = pass_accept_req(dev, rpl_skb);
3643 static int deferred_fw6_msg(struct c4iw_dev *dev, struct sk_buff *skb)
3645 struct cpl_fw6_msg *rpl = cplhdr(skb);
3646 struct cpl_fw6_msg_ofld_connection_wr_rpl *req;
3648 switch (rpl->type) {
3650 c4iw_ev_dispatch(dev, (struct t4_cqe *)&rpl->data[0]);
3652 case FW6_TYPE_OFLD_CONNECTION_WR_RPL:
3653 req = (struct cpl_fw6_msg_ofld_connection_wr_rpl *)rpl->data;
3654 switch (req->t_state) {
3656 active_ofld_conn_reply(dev, skb, req);
3659 passive_ofld_conn_reply(dev, skb, req);
3662 pr_err("%s unexpected ofld conn wr state %d\n",
3663 __func__, req->t_state);
3671 static void build_cpl_pass_accept_req(struct sk_buff *skb, int stid , u8 tos)
3674 __be16 hdr_len, vlantag, len;
3676 int tcp_hdr_len, ip_hdr_len;
3678 struct cpl_rx_pkt *cpl = cplhdr(skb);
3679 struct cpl_pass_accept_req *req;
3680 struct tcp_options_received tmp_opt;
3681 struct c4iw_dev *dev;
3682 enum chip_type type;
3684 dev = *((struct c4iw_dev **) (skb->cb + sizeof(void *)));
3685 /* Store values from cpl_rx_pkt in temporary location. */
3686 vlantag = cpl->vlan;
3688 l2info = cpl->l2info;
3689 hdr_len = cpl->hdr_len;
3692 __skb_pull(skb, sizeof(*req) + sizeof(struct rss_header));
3695 * We need to parse the TCP options from SYN packet.
3696 * to generate cpl_pass_accept_req.
3698 memset(&tmp_opt, 0, sizeof(tmp_opt));
3699 tcp_clear_options(&tmp_opt);
3700 tcp_parse_options(skb, &tmp_opt, 0, NULL);
3702 req = (struct cpl_pass_accept_req *)__skb_push(skb, sizeof(*req));
3703 memset(req, 0, sizeof(*req));
3704 req->l2info = cpu_to_be16(SYN_INTF_V(intf) |
3705 SYN_MAC_IDX_V(RX_MACIDX_G(
3706 be32_to_cpu(l2info))) |
3708 type = dev->rdev.lldi.adapter_type;
3709 tcp_hdr_len = RX_TCPHDR_LEN_G(be16_to_cpu(hdr_len));
3710 ip_hdr_len = RX_IPHDR_LEN_G(be16_to_cpu(hdr_len));
3712 cpu_to_be32(SYN_RX_CHAN_V(RX_CHAN_G(be32_to_cpu(l2info))));
3713 if (CHELSIO_CHIP_VERSION(type) <= CHELSIO_T5) {
3714 eth_hdr_len = is_t4(type) ?
3715 RX_ETHHDR_LEN_G(be32_to_cpu(l2info)) :
3716 RX_T5_ETHHDR_LEN_G(be32_to_cpu(l2info));
3717 req->hdr_len |= cpu_to_be32(TCP_HDR_LEN_V(tcp_hdr_len) |
3718 IP_HDR_LEN_V(ip_hdr_len) |
3719 ETH_HDR_LEN_V(eth_hdr_len));
3720 } else { /* T6 and later */
3721 eth_hdr_len = RX_T6_ETHHDR_LEN_G(be32_to_cpu(l2info));
3722 req->hdr_len |= cpu_to_be32(T6_TCP_HDR_LEN_V(tcp_hdr_len) |
3723 T6_IP_HDR_LEN_V(ip_hdr_len) |
3724 T6_ETH_HDR_LEN_V(eth_hdr_len));
3726 req->vlan = vlantag;
3728 req->tos_stid = cpu_to_be32(PASS_OPEN_TID_V(stid) |
3729 PASS_OPEN_TOS_V(tos));
3730 req->tcpopt.mss = htons(tmp_opt.mss_clamp);
3731 if (tmp_opt.wscale_ok)
3732 req->tcpopt.wsf = tmp_opt.snd_wscale;
3733 req->tcpopt.tstamp = tmp_opt.saw_tstamp;
3734 if (tmp_opt.sack_ok)
3735 req->tcpopt.sack = 1;
3736 OPCODE_TID(req) = htonl(MK_OPCODE_TID(CPL_PASS_ACCEPT_REQ, 0));
3740 static void send_fw_pass_open_req(struct c4iw_dev *dev, struct sk_buff *skb,
3741 __be32 laddr, __be16 lport,
3742 __be32 raddr, __be16 rport,
3743 u32 rcv_isn, u32 filter, u16 window,
3744 u32 rss_qid, u8 port_id)
3746 struct sk_buff *req_skb;
3747 struct fw_ofld_connection_wr *req;
3748 struct cpl_pass_accept_req *cpl = cplhdr(skb);
3751 req_skb = alloc_skb(sizeof(struct fw_ofld_connection_wr), GFP_KERNEL);
3752 req = (struct fw_ofld_connection_wr *)__skb_put(req_skb, sizeof(*req));
3753 memset(req, 0, sizeof(*req));
3754 req->op_compl = htonl(WR_OP_V(FW_OFLD_CONNECTION_WR) | FW_WR_COMPL_F);
3755 req->len16_pkd = htonl(FW_WR_LEN16_V(DIV_ROUND_UP(sizeof(*req), 16)));
3756 req->le.version_cpl = htonl(FW_OFLD_CONNECTION_WR_CPL_F);
3757 req->le.filter = (__force __be32) filter;
3758 req->le.lport = lport;
3759 req->le.pport = rport;
3760 req->le.u.ipv4.lip = laddr;
3761 req->le.u.ipv4.pip = raddr;
3762 req->tcb.rcv_nxt = htonl(rcv_isn + 1);
3763 req->tcb.rcv_adv = htons(window);
3764 req->tcb.t_state_to_astid =
3765 htonl(FW_OFLD_CONNECTION_WR_T_STATE_V(TCP_SYN_RECV) |
3766 FW_OFLD_CONNECTION_WR_RCV_SCALE_V(cpl->tcpopt.wsf) |
3767 FW_OFLD_CONNECTION_WR_ASTID_V(
3768 PASS_OPEN_TID_G(ntohl(cpl->tos_stid))));
3771 * We store the qid in opt2 which will be used by the firmware
3772 * to send us the wr response.
3774 req->tcb.opt2 = htonl(RSS_QUEUE_V(rss_qid));
3777 * We initialize the MSS index in TCB to 0xF.
3778 * So that when driver sends cpl_pass_accept_rpl
3779 * TCB picks up the correct value. If this was 0
3780 * TP will ignore any value > 0 for MSS index.
3782 req->tcb.opt0 = cpu_to_be64(MSS_IDX_V(0xF));
3783 req->cookie = (uintptr_t)skb;
3785 set_wr_txq(req_skb, CPL_PRIORITY_CONTROL, port_id);
3786 ret = cxgb4_ofld_send(dev->rdev.lldi.ports[0], req_skb);
3788 pr_err("%s - cxgb4_ofld_send error %d - dropping\n", __func__,
3796 * Handler for CPL_RX_PKT message. Need to handle cpl_rx_pkt
3797 * messages when a filter is being used instead of server to
3798 * redirect a syn packet. When packets hit filter they are redirected
3799 * to the offload queue and driver tries to establish the connection
3800 * using firmware work request.
3802 static int rx_pkt(struct c4iw_dev *dev, struct sk_buff *skb)
3805 unsigned int filter;
3806 struct ethhdr *eh = NULL;
3807 struct vlan_ethhdr *vlan_eh = NULL;
3809 struct tcphdr *tcph;
3810 struct rss_header *rss = (void *)skb->data;
3811 struct cpl_rx_pkt *cpl = (void *)skb->data;
3812 struct cpl_pass_accept_req *req = (void *)(rss + 1);
3813 struct l2t_entry *e;
3814 struct dst_entry *dst;
3815 struct c4iw_ep *lep;
3817 struct port_info *pi;
3818 struct net_device *pdev;
3819 u16 rss_qid, eth_hdr_len;
3822 struct neighbour *neigh;
3824 /* Drop all non-SYN packets */
3825 if (!(cpl->l2info & cpu_to_be32(RXF_SYN_F)))
3829 * Drop all packets which did not hit the filter.
3830 * Unlikely to happen.
3832 if (!(rss->filter_hit && rss->filter_tid))
3836 * Calculate the server tid from filter hit index from cpl_rx_pkt.
3838 stid = (__force int) cpu_to_be32((__force u32) rss->hash_val);
3840 lep = (struct c4iw_ep *)lookup_stid(dev->rdev.lldi.tids, stid);
3842 PDBG("%s connect request on invalid stid %d\n", __func__, stid);
3846 switch (CHELSIO_CHIP_VERSION(dev->rdev.lldi.adapter_type)) {
3848 eth_hdr_len = RX_ETHHDR_LEN_G(be32_to_cpu(cpl->l2info));
3851 eth_hdr_len = RX_T5_ETHHDR_LEN_G(be32_to_cpu(cpl->l2info));
3854 eth_hdr_len = RX_T6_ETHHDR_LEN_G(be32_to_cpu(cpl->l2info));
3857 pr_err("T%d Chip is not supported\n",
3858 CHELSIO_CHIP_VERSION(dev->rdev.lldi.adapter_type));
3862 if (eth_hdr_len == ETH_HLEN) {
3863 eh = (struct ethhdr *)(req + 1);
3864 iph = (struct iphdr *)(eh + 1);
3866 vlan_eh = (struct vlan_ethhdr *)(req + 1);
3867 iph = (struct iphdr *)(vlan_eh + 1);
3868 skb->vlan_tci = ntohs(cpl->vlan);
3871 if (iph->version != 0x4)
3874 tcph = (struct tcphdr *)(iph + 1);
3875 skb_set_network_header(skb, (void *)iph - (void *)rss);
3876 skb_set_transport_header(skb, (void *)tcph - (void *)rss);
3879 PDBG("%s lip 0x%x lport %u pip 0x%x pport %u tos %d\n", __func__,
3880 ntohl(iph->daddr), ntohs(tcph->dest), ntohl(iph->saddr),
3881 ntohs(tcph->source), iph->tos);
3883 dst = find_route(dev, iph->daddr, iph->saddr, tcph->dest, tcph->source,
3886 pr_err("%s - failed to find dst entry!\n",
3890 neigh = dst_neigh_lookup_skb(dst, skb);
3893 pr_err("%s - failed to allocate neigh!\n",
3898 if (neigh->dev->flags & IFF_LOOPBACK) {
3899 pdev = ip_dev_find(&init_net, iph->daddr);
3900 e = cxgb4_l2t_get(dev->rdev.lldi.l2t, neigh,
3902 pi = (struct port_info *)netdev_priv(pdev);
3903 tx_chan = cxgb4_port_chan(pdev);
3906 pdev = get_real_dev(neigh->dev);
3907 e = cxgb4_l2t_get(dev->rdev.lldi.l2t, neigh,
3909 pi = (struct port_info *)netdev_priv(pdev);
3910 tx_chan = cxgb4_port_chan(pdev);
3912 neigh_release(neigh);
3914 pr_err("%s - failed to allocate l2t entry!\n",
3919 step = dev->rdev.lldi.nrxq / dev->rdev.lldi.nchan;
3920 rss_qid = dev->rdev.lldi.rxq_ids[pi->port_id * step];
3921 window = (__force u16) htons((__force u16)tcph->window);
3923 /* Calcuate filter portion for LE region. */
3924 filter = (__force unsigned int) cpu_to_be32(cxgb4_select_ntuple(
3925 dev->rdev.lldi.ports[0],
3929 * Synthesize the cpl_pass_accept_req. We have everything except the
3930 * TID. Once firmware sends a reply with TID we update the TID field
3931 * in cpl and pass it through the regular cpl_pass_accept_req path.
3933 build_cpl_pass_accept_req(skb, stid, iph->tos);
3934 send_fw_pass_open_req(dev, skb, iph->daddr, tcph->dest, iph->saddr,
3935 tcph->source, ntohl(tcph->seq), filter, window,
3936 rss_qid, pi->port_id);
3937 cxgb4_l2t_release(e);
3945 * These are the real handlers that are called from a
3948 static c4iw_handler_func work_handlers[NUM_CPL_CMDS + NUM_FAKE_CPLS] = {
3949 [CPL_ACT_ESTABLISH] = act_establish,
3950 [CPL_ACT_OPEN_RPL] = act_open_rpl,
3951 [CPL_RX_DATA] = rx_data,
3952 [CPL_ABORT_RPL_RSS] = abort_rpl,
3953 [CPL_ABORT_RPL] = abort_rpl,
3954 [CPL_PASS_OPEN_RPL] = pass_open_rpl,
3955 [CPL_CLOSE_LISTSRV_RPL] = close_listsrv_rpl,
3956 [CPL_PASS_ACCEPT_REQ] = pass_accept_req,
3957 [CPL_PASS_ESTABLISH] = pass_establish,
3958 [CPL_PEER_CLOSE] = peer_close,
3959 [CPL_ABORT_REQ_RSS] = peer_abort,
3960 [CPL_CLOSE_CON_RPL] = close_con_rpl,
3961 [CPL_RDMA_TERMINATE] = terminate,
3962 [CPL_FW4_ACK] = fw4_ack,
3963 [CPL_FW6_MSG] = deferred_fw6_msg,
3964 [CPL_RX_PKT] = rx_pkt,
3965 [FAKE_CPL_PUT_EP_SAFE] = _put_ep_safe,
3966 [FAKE_CPL_PASS_PUT_EP_SAFE] = _put_pass_ep_safe
3969 static void process_timeout(struct c4iw_ep *ep)
3971 struct c4iw_qp_attributes attrs;
3974 mutex_lock(&ep->com.mutex);
3975 PDBG("%s ep %p tid %u state %d\n", __func__, ep, ep->hwtid,
3977 set_bit(TIMEDOUT, &ep->com.history);
3978 switch (ep->com.state) {
3980 connect_reply_upcall(ep, -ETIMEDOUT);
3987 if (ep->com.cm_id && ep->com.qp) {
3988 attrs.next_state = C4IW_QP_STATE_ERROR;
3989 c4iw_modify_qp(ep->com.qp->rhp,
3990 ep->com.qp, C4IW_QP_ATTR_NEXT_STATE,
3993 close_complete_upcall(ep, -ETIMEDOUT);
3999 * These states are expected if the ep timed out at the same
4000 * time as another thread was calling stop_ep_timer().
4001 * So we silently do nothing for these states.
4006 WARN(1, "%s unexpected state ep %p tid %u state %u\n",
4007 __func__, ep, ep->hwtid, ep->com.state);
4010 mutex_unlock(&ep->com.mutex);
4012 c4iw_ep_disconnect(ep, 1, GFP_KERNEL);
4013 c4iw_put_ep(&ep->com);
4016 static void process_timedout_eps(void)
4020 spin_lock_irq(&timeout_lock);
4021 while (!list_empty(&timeout_list)) {
4022 struct list_head *tmp;
4024 tmp = timeout_list.next;
4028 spin_unlock_irq(&timeout_lock);
4029 ep = list_entry(tmp, struct c4iw_ep, entry);
4030 process_timeout(ep);
4031 spin_lock_irq(&timeout_lock);
4033 spin_unlock_irq(&timeout_lock);
4036 static void process_work(struct work_struct *work)
4038 struct sk_buff *skb = NULL;
4039 struct c4iw_dev *dev;
4040 struct cpl_act_establish *rpl;
4041 unsigned int opcode;
4044 process_timedout_eps();
4045 while ((skb = skb_dequeue(&rxq))) {
4047 dev = *((struct c4iw_dev **) (skb->cb + sizeof(void *)));
4048 opcode = rpl->ot.opcode;
4050 BUG_ON(!work_handlers[opcode]);
4051 ret = work_handlers[opcode](dev, skb);
4054 process_timedout_eps();
4058 static DECLARE_WORK(skb_work, process_work);
4060 static void ep_timeout(unsigned long arg)
4062 struct c4iw_ep *ep = (struct c4iw_ep *)arg;
4065 spin_lock(&timeout_lock);
4066 if (!test_and_set_bit(TIMEOUT, &ep->com.flags)) {
4068 * Only insert if it is not already on the list.
4070 if (!ep->entry.next) {
4071 list_add_tail(&ep->entry, &timeout_list);
4075 spin_unlock(&timeout_lock);
4077 queue_work(workq, &skb_work);
4081 * All the CM events are handled on a work queue to have a safe context.
4083 static int sched(struct c4iw_dev *dev, struct sk_buff *skb)
4087 * Save dev in the skb->cb area.
4089 *((struct c4iw_dev **) (skb->cb + sizeof(void *))) = dev;
4092 * Queue the skb and schedule the worker thread.
4094 skb_queue_tail(&rxq, skb);
4095 queue_work(workq, &skb_work);
4099 static int set_tcb_rpl(struct c4iw_dev *dev, struct sk_buff *skb)
4101 struct cpl_set_tcb_rpl *rpl = cplhdr(skb);
4103 if (rpl->status != CPL_ERR_NONE) {
4104 printk(KERN_ERR MOD "Unexpected SET_TCB_RPL status %u "
4105 "for tid %u\n", rpl->status, GET_TID(rpl));
4111 static int fw6_msg(struct c4iw_dev *dev, struct sk_buff *skb)
4113 struct cpl_fw6_msg *rpl = cplhdr(skb);
4114 struct c4iw_wr_wait *wr_waitp;
4117 PDBG("%s type %u\n", __func__, rpl->type);
4119 switch (rpl->type) {
4120 case FW6_TYPE_WR_RPL:
4121 ret = (int)((be64_to_cpu(rpl->data[0]) >> 8) & 0xff);
4122 wr_waitp = (struct c4iw_wr_wait *)(__force unsigned long) rpl->data[1];
4123 PDBG("%s wr_waitp %p ret %u\n", __func__, wr_waitp, ret);
4125 c4iw_wake_up(wr_waitp, ret ? -ret : 0);
4129 case FW6_TYPE_OFLD_CONNECTION_WR_RPL:
4133 printk(KERN_ERR MOD "%s unexpected fw6 msg type %u\n", __func__,
4141 static int peer_abort_intr(struct c4iw_dev *dev, struct sk_buff *skb)
4143 struct cpl_abort_req_rss *req = cplhdr(skb);
4145 struct tid_info *t = dev->rdev.lldi.tids;
4146 unsigned int tid = GET_TID(req);
4148 ep = lookup_tid(t, tid);
4150 printk(KERN_WARNING MOD
4151 "Abort on non-existent endpoint, tid %d\n", tid);
4155 if (is_neg_adv(req->status)) {
4156 PDBG("%s Negative advice on abort- tid %u status %d (%s)\n",
4157 __func__, ep->hwtid, req->status,
4158 neg_adv_str(req->status));
4159 ep->stats.abort_neg_adv++;
4160 dev->rdev.stats.neg_adv++;
4164 PDBG("%s ep %p tid %u state %u\n", __func__, ep, ep->hwtid,
4168 * Wake up any threads in rdma_init() or rdma_fini().
4169 * However, if we are on MPAv2 and want to retry with MPAv1
4170 * then, don't wake up yet.
4172 if (mpa_rev == 2 && !ep->tried_with_mpa_v1) {
4173 if (ep->com.state != MPA_REQ_SENT)
4174 c4iw_wake_up(&ep->com.wr_wait, -ECONNRESET);
4176 c4iw_wake_up(&ep->com.wr_wait, -ECONNRESET);
4182 * Most upcalls from the T4 Core go to sched() to
4183 * schedule the processing on a work queue.
4185 c4iw_handler_func c4iw_handlers[NUM_CPL_CMDS] = {
4186 [CPL_ACT_ESTABLISH] = sched,
4187 [CPL_ACT_OPEN_RPL] = sched,
4188 [CPL_RX_DATA] = sched,
4189 [CPL_ABORT_RPL_RSS] = sched,
4190 [CPL_ABORT_RPL] = sched,
4191 [CPL_PASS_OPEN_RPL] = sched,
4192 [CPL_CLOSE_LISTSRV_RPL] = sched,
4193 [CPL_PASS_ACCEPT_REQ] = sched,
4194 [CPL_PASS_ESTABLISH] = sched,
4195 [CPL_PEER_CLOSE] = sched,
4196 [CPL_CLOSE_CON_RPL] = sched,
4197 [CPL_ABORT_REQ_RSS] = peer_abort_intr,
4198 [CPL_RDMA_TERMINATE] = sched,
4199 [CPL_FW4_ACK] = sched,
4200 [CPL_SET_TCB_RPL] = set_tcb_rpl,
4201 [CPL_FW6_MSG] = fw6_msg,
4202 [CPL_RX_PKT] = sched
4205 int __init c4iw_cm_init(void)
4207 spin_lock_init(&timeout_lock);
4208 skb_queue_head_init(&rxq);
4210 workq = create_singlethread_workqueue("iw_cxgb4");
4217 void c4iw_cm_term(void)
4219 WARN_ON(!list_empty(&timeout_list));
4220 flush_workqueue(workq);
4221 destroy_workqueue(workq);