2 * Copyright (c) 2009-2010 Chelsio, Inc. All rights reserved.
4 * This software is available to you under a choice of one of two
5 * licenses. You may choose to be licensed under the terms of the GNU
6 * General Public License (GPL) Version 2, available from the file
7 * COPYING in the main directory of this source tree, or the
8 * OpenIB.org BSD license below:
10 * Redistribution and use in source and binary forms, with or
11 * without modification, are permitted provided that the following
14 * - Redistributions of source code must retain the above
15 * copyright notice, this list of conditions and the following
18 * - Redistributions in binary form must reproduce the above
19 * copyright notice, this list of conditions and the following
20 * disclaimer in the documentation and/or other materials
21 * provided with the distribution.
23 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
24 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
25 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
26 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
27 * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
28 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
29 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
32 #include <linux/module.h>
33 #include <linux/list.h>
34 #include <linux/workqueue.h>
35 #include <linux/skbuff.h>
36 #include <linux/timer.h>
37 #include <linux/notifier.h>
38 #include <linux/inetdevice.h>
40 #include <linux/tcp.h>
42 #include <net/neighbour.h>
43 #include <net/netevent.h>
44 #include <net/route.h>
48 static char *states[] = {
64 int c4iw_max_read_depth = 8;
65 module_param(c4iw_max_read_depth, int, 0644);
66 MODULE_PARM_DESC(c4iw_max_read_depth, "Per-connection max ORD/IRD (default=8)");
68 static int enable_tcp_timestamps;
69 module_param(enable_tcp_timestamps, int, 0644);
70 MODULE_PARM_DESC(enable_tcp_timestamps, "Enable tcp timestamps (default=0)");
72 static int enable_tcp_sack;
73 module_param(enable_tcp_sack, int, 0644);
74 MODULE_PARM_DESC(enable_tcp_sack, "Enable tcp SACK (default=0)");
76 static int enable_tcp_window_scaling = 1;
77 module_param(enable_tcp_window_scaling, int, 0644);
78 MODULE_PARM_DESC(enable_tcp_window_scaling,
79 "Enable tcp window scaling (default=1)");
82 module_param(c4iw_debug, int, 0644);
83 MODULE_PARM_DESC(c4iw_debug, "Enable debug logging (default=0)");
86 module_param(peer2peer, int, 0644);
87 MODULE_PARM_DESC(peer2peer, "Support peer2peer ULPs (default=0)");
89 static int p2p_type = FW_RI_INIT_P2PTYPE_READ_REQ;
90 module_param(p2p_type, int, 0644);
91 MODULE_PARM_DESC(p2p_type, "RDMAP opcode to use for the RTR message: "
92 "1=RDMA_READ 0=RDMA_WRITE (default 1)");
94 static int ep_timeout_secs = 60;
95 module_param(ep_timeout_secs, int, 0644);
96 MODULE_PARM_DESC(ep_timeout_secs, "CM Endpoint operation timeout "
97 "in seconds (default=60)");
99 static int mpa_rev = 1;
100 module_param(mpa_rev, int, 0644);
101 MODULE_PARM_DESC(mpa_rev, "MPA Revision, 0 supports amso1100, "
102 "1 is spec compliant. (default=1)");
104 static int markers_enabled;
105 module_param(markers_enabled, int, 0644);
106 MODULE_PARM_DESC(markers_enabled, "Enable MPA MARKERS (default(0)=disabled)");
108 static int crc_enabled = 1;
109 module_param(crc_enabled, int, 0644);
110 MODULE_PARM_DESC(crc_enabled, "Enable MPA CRC (default(1)=enabled)");
112 static int rcv_win = 256 * 1024;
113 module_param(rcv_win, int, 0644);
114 MODULE_PARM_DESC(rcv_win, "TCP receive window in bytes (default=256KB)");
116 static int snd_win = 32 * 1024;
117 module_param(snd_win, int, 0644);
118 MODULE_PARM_DESC(snd_win, "TCP send window in bytes (default=32KB)");
120 static struct workqueue_struct *workq;
122 static struct sk_buff_head rxq;
124 static struct sk_buff *get_skb(struct sk_buff *skb, int len, gfp_t gfp);
125 static void ep_timeout(unsigned long arg);
126 static void connect_reply_upcall(struct c4iw_ep *ep, int status);
128 static LIST_HEAD(timeout_list);
129 static spinlock_t timeout_lock;
131 static void start_ep_timer(struct c4iw_ep *ep)
133 PDBG("%s ep %p\n", __func__, ep);
134 if (timer_pending(&ep->timer)) {
135 PDBG("%s stopped / restarted timer ep %p\n", __func__, ep);
136 del_timer_sync(&ep->timer);
138 c4iw_get_ep(&ep->com);
139 ep->timer.expires = jiffies + ep_timeout_secs * HZ;
140 ep->timer.data = (unsigned long)ep;
141 ep->timer.function = ep_timeout;
142 add_timer(&ep->timer);
145 static void stop_ep_timer(struct c4iw_ep *ep)
147 PDBG("%s ep %p\n", __func__, ep);
148 if (!timer_pending(&ep->timer)) {
149 printk(KERN_ERR "%s timer stopped when its not running! "
150 "ep %p state %u\n", __func__, ep, ep->com.state);
154 del_timer_sync(&ep->timer);
155 c4iw_put_ep(&ep->com);
158 static int c4iw_l2t_send(struct c4iw_rdev *rdev, struct sk_buff *skb,
159 struct l2t_entry *l2e)
163 if (c4iw_fatal_error(rdev)) {
165 PDBG("%s - device in error state - dropping\n", __func__);
168 error = cxgb4_l2t_send(rdev->lldi.ports[0], skb, l2e);
174 int c4iw_ofld_send(struct c4iw_rdev *rdev, struct sk_buff *skb)
178 if (c4iw_fatal_error(rdev)) {
180 PDBG("%s - device in error state - dropping\n", __func__);
183 error = cxgb4_ofld_send(rdev->lldi.ports[0], skb);
189 static void release_tid(struct c4iw_rdev *rdev, u32 hwtid, struct sk_buff *skb)
191 struct cpl_tid_release *req;
193 skb = get_skb(skb, sizeof *req, GFP_KERNEL);
196 req = (struct cpl_tid_release *) skb_put(skb, sizeof(*req));
197 INIT_TP_WR(req, hwtid);
198 OPCODE_TID(req) = cpu_to_be32(MK_OPCODE_TID(CPL_TID_RELEASE, hwtid));
199 set_wr_txq(skb, CPL_PRIORITY_SETUP, 0);
200 c4iw_ofld_send(rdev, skb);
204 static void set_emss(struct c4iw_ep *ep, u16 opt)
206 ep->emss = ep->com.dev->rdev.lldi.mtus[GET_TCPOPT_MSS(opt)] - 40;
208 if (GET_TCPOPT_TSTAMP(opt))
212 PDBG("%s mss_idx %u mss %u emss=%u\n", __func__, GET_TCPOPT_MSS(opt),
216 static enum c4iw_ep_state state_read(struct c4iw_ep_common *epc)
219 enum c4iw_ep_state state;
221 spin_lock_irqsave(&epc->lock, flags);
223 spin_unlock_irqrestore(&epc->lock, flags);
227 static void __state_set(struct c4iw_ep_common *epc, enum c4iw_ep_state new)
232 static void state_set(struct c4iw_ep_common *epc, enum c4iw_ep_state new)
236 spin_lock_irqsave(&epc->lock, flags);
237 PDBG("%s - %s -> %s\n", __func__, states[epc->state], states[new]);
238 __state_set(epc, new);
239 spin_unlock_irqrestore(&epc->lock, flags);
243 static void *alloc_ep(int size, gfp_t gfp)
245 struct c4iw_ep_common *epc;
247 epc = kzalloc(size, gfp);
249 kref_init(&epc->kref);
250 spin_lock_init(&epc->lock);
251 init_waitqueue_head(&epc->waitq);
253 PDBG("%s alloc ep %p\n", __func__, epc);
257 void _c4iw_free_ep(struct kref *kref)
261 ep = container_of(kref, struct c4iw_ep, com.kref);
262 PDBG("%s ep %p state %s\n", __func__, ep, states[state_read(&ep->com)]);
263 if (test_bit(RELEASE_RESOURCES, &ep->com.flags)) {
264 cxgb4_remove_tid(ep->com.dev->rdev.lldi.tids, 0, ep->hwtid);
265 dst_release(ep->dst);
266 cxgb4_l2t_release(ep->l2t);
271 static void release_ep_resources(struct c4iw_ep *ep)
273 set_bit(RELEASE_RESOURCES, &ep->com.flags);
274 c4iw_put_ep(&ep->com);
277 static int status2errno(int status)
282 case CPL_ERR_CONN_RESET:
284 case CPL_ERR_ARP_MISS:
285 return -EHOSTUNREACH;
286 case CPL_ERR_CONN_TIMEDOUT:
288 case CPL_ERR_TCAM_FULL:
290 case CPL_ERR_CONN_EXIST:
298 * Try and reuse skbs already allocated...
300 static struct sk_buff *get_skb(struct sk_buff *skb, int len, gfp_t gfp)
302 if (skb && !skb_is_nonlinear(skb) && !skb_cloned(skb)) {
305 skb_reset_transport_header(skb);
307 skb = alloc_skb(len, gfp);
312 static struct rtable *find_route(struct c4iw_dev *dev, __be32 local_ip,
313 __be32 peer_ip, __be16 local_port,
314 __be16 peer_port, u8 tos)
325 .proto = IPPROTO_TCP,
333 if (ip_route_output_flow(&init_net, &rt, &fl, NULL, 0))
338 static void arp_failure_discard(void *handle, struct sk_buff *skb)
340 PDBG("%s c4iw_dev %p\n", __func__, handle);
345 * Handle an ARP failure for an active open.
347 static void act_open_req_arp_failure(void *handle, struct sk_buff *skb)
349 printk(KERN_ERR MOD "ARP failure duing connect\n");
354 * Handle an ARP failure for a CPL_ABORT_REQ. Change it into a no RST variant
357 static void abort_arp_failure(void *handle, struct sk_buff *skb)
359 struct c4iw_rdev *rdev = handle;
360 struct cpl_abort_req *req = cplhdr(skb);
362 PDBG("%s rdev %p\n", __func__, rdev);
363 req->cmd = CPL_ABORT_NO_RST;
364 c4iw_ofld_send(rdev, skb);
367 static void send_flowc(struct c4iw_ep *ep, struct sk_buff *skb)
369 unsigned int flowclen = 80;
370 struct fw_flowc_wr *flowc;
373 skb = get_skb(skb, flowclen, GFP_KERNEL);
374 flowc = (struct fw_flowc_wr *)__skb_put(skb, flowclen);
376 flowc->op_to_nparams = cpu_to_be32(FW_WR_OP(FW_FLOWC_WR) |
377 FW_FLOWC_WR_NPARAMS(8));
378 flowc->flowid_len16 = cpu_to_be32(FW_WR_LEN16(DIV_ROUND_UP(flowclen,
379 16)) | FW_WR_FLOWID(ep->hwtid));
381 flowc->mnemval[0].mnemonic = FW_FLOWC_MNEM_PFNVFN;
382 flowc->mnemval[0].val = cpu_to_be32(0);
383 flowc->mnemval[1].mnemonic = FW_FLOWC_MNEM_CH;
384 flowc->mnemval[1].val = cpu_to_be32(ep->tx_chan);
385 flowc->mnemval[2].mnemonic = FW_FLOWC_MNEM_PORT;
386 flowc->mnemval[2].val = cpu_to_be32(ep->tx_chan);
387 flowc->mnemval[3].mnemonic = FW_FLOWC_MNEM_IQID;
388 flowc->mnemval[3].val = cpu_to_be32(ep->rss_qid);
389 flowc->mnemval[4].mnemonic = FW_FLOWC_MNEM_SNDNXT;
390 flowc->mnemval[4].val = cpu_to_be32(ep->snd_seq);
391 flowc->mnemval[5].mnemonic = FW_FLOWC_MNEM_RCVNXT;
392 flowc->mnemval[5].val = cpu_to_be32(ep->rcv_seq);
393 flowc->mnemval[6].mnemonic = FW_FLOWC_MNEM_SNDBUF;
394 flowc->mnemval[6].val = cpu_to_be32(snd_win);
395 flowc->mnemval[7].mnemonic = FW_FLOWC_MNEM_MSS;
396 flowc->mnemval[7].val = cpu_to_be32(ep->emss);
397 /* Pad WR to 16 byte boundary */
398 flowc->mnemval[8].mnemonic = 0;
399 flowc->mnemval[8].val = 0;
400 for (i = 0; i < 9; i++) {
401 flowc->mnemval[i].r4[0] = 0;
402 flowc->mnemval[i].r4[1] = 0;
403 flowc->mnemval[i].r4[2] = 0;
406 set_wr_txq(skb, CPL_PRIORITY_DATA, ep->txq_idx);
407 c4iw_ofld_send(&ep->com.dev->rdev, skb);
410 static int send_halfclose(struct c4iw_ep *ep, gfp_t gfp)
412 struct cpl_close_con_req *req;
414 int wrlen = roundup(sizeof *req, 16);
416 PDBG("%s ep %p tid %u\n", __func__, ep, ep->hwtid);
417 skb = get_skb(NULL, wrlen, gfp);
419 printk(KERN_ERR MOD "%s - failed to alloc skb\n", __func__);
422 set_wr_txq(skb, CPL_PRIORITY_DATA, ep->txq_idx);
423 t4_set_arp_err_handler(skb, NULL, arp_failure_discard);
424 req = (struct cpl_close_con_req *) skb_put(skb, wrlen);
425 memset(req, 0, wrlen);
426 INIT_TP_WR(req, ep->hwtid);
427 OPCODE_TID(req) = cpu_to_be32(MK_OPCODE_TID(CPL_CLOSE_CON_REQ,
429 return c4iw_l2t_send(&ep->com.dev->rdev, skb, ep->l2t);
432 static int send_abort(struct c4iw_ep *ep, struct sk_buff *skb, gfp_t gfp)
434 struct cpl_abort_req *req;
435 int wrlen = roundup(sizeof *req, 16);
437 PDBG("%s ep %p tid %u\n", __func__, ep, ep->hwtid);
438 skb = get_skb(skb, wrlen, gfp);
440 printk(KERN_ERR MOD "%s - failed to alloc skb.\n",
444 set_wr_txq(skb, CPL_PRIORITY_DATA, ep->txq_idx);
445 t4_set_arp_err_handler(skb, &ep->com.dev->rdev, abort_arp_failure);
446 req = (struct cpl_abort_req *) skb_put(skb, wrlen);
447 memset(req, 0, wrlen);
448 INIT_TP_WR(req, ep->hwtid);
449 OPCODE_TID(req) = cpu_to_be32(MK_OPCODE_TID(CPL_ABORT_REQ, ep->hwtid));
450 req->cmd = CPL_ABORT_SEND_RST;
451 return c4iw_l2t_send(&ep->com.dev->rdev, skb, ep->l2t);
454 static int send_connect(struct c4iw_ep *ep)
456 struct cpl_act_open_req *req;
460 unsigned int mtu_idx;
462 int wrlen = roundup(sizeof *req, 16);
464 PDBG("%s ep %p atid %u\n", __func__, ep, ep->atid);
466 skb = get_skb(NULL, wrlen, GFP_KERNEL);
468 printk(KERN_ERR MOD "%s - failed to alloc skb.\n",
472 set_wr_txq(skb, CPL_PRIORITY_SETUP, ep->txq_idx);
474 cxgb4_best_mtu(ep->com.dev->rdev.lldi.mtus, ep->mtu, &mtu_idx);
475 wscale = compute_wscale(rcv_win);
476 opt0 = KEEP_ALIVE(1) |
479 L2T_IDX(ep->l2t->idx) |
480 TX_CHAN(ep->tx_chan) |
481 SMAC_SEL(ep->smac_idx) |
483 RCV_BUFSIZ(rcv_win>>10);
484 opt2 = RX_CHANNEL(0) |
485 RSS_QUEUE_VALID | RSS_QUEUE(ep->rss_qid);
486 if (enable_tcp_timestamps)
487 opt2 |= TSTAMPS_EN(1);
490 if (wscale && enable_tcp_window_scaling)
491 opt2 |= WND_SCALE_EN(1);
492 t4_set_arp_err_handler(skb, NULL, act_open_req_arp_failure);
494 req = (struct cpl_act_open_req *) skb_put(skb, wrlen);
496 OPCODE_TID(req) = cpu_to_be32(
497 MK_OPCODE_TID(CPL_ACT_OPEN_REQ, ((ep->rss_qid<<14)|ep->atid)));
498 req->local_port = ep->com.local_addr.sin_port;
499 req->peer_port = ep->com.remote_addr.sin_port;
500 req->local_ip = ep->com.local_addr.sin_addr.s_addr;
501 req->peer_ip = ep->com.remote_addr.sin_addr.s_addr;
502 req->opt0 = cpu_to_be64(opt0);
504 req->opt2 = cpu_to_be32(opt2);
505 return c4iw_l2t_send(&ep->com.dev->rdev, skb, ep->l2t);
508 static void send_mpa_req(struct c4iw_ep *ep, struct sk_buff *skb)
511 struct fw_ofld_tx_data_wr *req;
512 struct mpa_message *mpa;
514 PDBG("%s ep %p tid %u pd_len %d\n", __func__, ep, ep->hwtid, ep->plen);
516 BUG_ON(skb_cloned(skb));
518 mpalen = sizeof(*mpa) + ep->plen;
519 wrlen = roundup(mpalen + sizeof *req, 16);
520 skb = get_skb(skb, wrlen, GFP_KERNEL);
522 connect_reply_upcall(ep, -ENOMEM);
525 set_wr_txq(skb, CPL_PRIORITY_DATA, ep->txq_idx);
527 req = (struct fw_ofld_tx_data_wr *)skb_put(skb, wrlen);
528 memset(req, 0, wrlen);
529 req->op_to_immdlen = cpu_to_be32(
530 FW_WR_OP(FW_OFLD_TX_DATA_WR) |
532 FW_WR_IMMDLEN(mpalen));
533 req->flowid_len16 = cpu_to_be32(
534 FW_WR_FLOWID(ep->hwtid) |
535 FW_WR_LEN16(wrlen >> 4));
536 req->plen = cpu_to_be32(mpalen);
537 req->tunnel_to_proxy = cpu_to_be32(
538 FW_OFLD_TX_DATA_WR_FLUSH(1) |
539 FW_OFLD_TX_DATA_WR_SHOVE(1));
541 mpa = (struct mpa_message *)(req + 1);
542 memcpy(mpa->key, MPA_KEY_REQ, sizeof(mpa->key));
543 mpa->flags = (crc_enabled ? MPA_CRC : 0) |
544 (markers_enabled ? MPA_MARKERS : 0);
545 mpa->private_data_size = htons(ep->plen);
546 mpa->revision = mpa_rev;
549 memcpy(mpa->private_data, ep->mpa_pkt + sizeof(*mpa), ep->plen);
552 * Reference the mpa skb. This ensures the data area
553 * will remain in memory until the hw acks the tx.
554 * Function fw4_ack() will deref it.
557 t4_set_arp_err_handler(skb, NULL, arp_failure_discard);
560 c4iw_l2t_send(&ep->com.dev->rdev, skb, ep->l2t);
562 state_set(&ep->com, MPA_REQ_SENT);
563 ep->mpa_attr.initiator = 1;
567 static int send_mpa_reject(struct c4iw_ep *ep, const void *pdata, u8 plen)
570 struct fw_ofld_tx_data_wr *req;
571 struct mpa_message *mpa;
574 PDBG("%s ep %p tid %u pd_len %d\n", __func__, ep, ep->hwtid, ep->plen);
576 mpalen = sizeof(*mpa) + plen;
577 wrlen = roundup(mpalen + sizeof *req, 16);
579 skb = get_skb(NULL, wrlen, GFP_KERNEL);
581 printk(KERN_ERR MOD "%s - cannot alloc skb!\n", __func__);
584 set_wr_txq(skb, CPL_PRIORITY_DATA, ep->txq_idx);
586 req = (struct fw_ofld_tx_data_wr *)skb_put(skb, wrlen);
587 memset(req, 0, wrlen);
588 req->op_to_immdlen = cpu_to_be32(
589 FW_WR_OP(FW_OFLD_TX_DATA_WR) |
591 FW_WR_IMMDLEN(mpalen));
592 req->flowid_len16 = cpu_to_be32(
593 FW_WR_FLOWID(ep->hwtid) |
594 FW_WR_LEN16(wrlen >> 4));
595 req->plen = cpu_to_be32(mpalen);
596 req->tunnel_to_proxy = cpu_to_be32(
597 FW_OFLD_TX_DATA_WR_FLUSH(1) |
598 FW_OFLD_TX_DATA_WR_SHOVE(1));
600 mpa = (struct mpa_message *)(req + 1);
601 memset(mpa, 0, sizeof(*mpa));
602 memcpy(mpa->key, MPA_KEY_REP, sizeof(mpa->key));
603 mpa->flags = MPA_REJECT;
604 mpa->revision = mpa_rev;
605 mpa->private_data_size = htons(plen);
607 memcpy(mpa->private_data, pdata, plen);
610 * Reference the mpa skb again. This ensures the data area
611 * will remain in memory until the hw acks the tx.
612 * Function fw4_ack() will deref it.
615 set_wr_txq(skb, CPL_PRIORITY_DATA, ep->txq_idx);
616 t4_set_arp_err_handler(skb, NULL, arp_failure_discard);
619 return c4iw_l2t_send(&ep->com.dev->rdev, skb, ep->l2t);
622 static int send_mpa_reply(struct c4iw_ep *ep, const void *pdata, u8 plen)
625 struct fw_ofld_tx_data_wr *req;
626 struct mpa_message *mpa;
629 PDBG("%s ep %p tid %u pd_len %d\n", __func__, ep, ep->hwtid, ep->plen);
631 mpalen = sizeof(*mpa) + plen;
632 wrlen = roundup(mpalen + sizeof *req, 16);
634 skb = get_skb(NULL, wrlen, GFP_KERNEL);
636 printk(KERN_ERR MOD "%s - cannot alloc skb!\n", __func__);
639 set_wr_txq(skb, CPL_PRIORITY_DATA, ep->txq_idx);
641 req = (struct fw_ofld_tx_data_wr *) skb_put(skb, wrlen);
642 memset(req, 0, wrlen);
643 req->op_to_immdlen = cpu_to_be32(
644 FW_WR_OP(FW_OFLD_TX_DATA_WR) |
646 FW_WR_IMMDLEN(mpalen));
647 req->flowid_len16 = cpu_to_be32(
648 FW_WR_FLOWID(ep->hwtid) |
649 FW_WR_LEN16(wrlen >> 4));
650 req->plen = cpu_to_be32(mpalen);
651 req->tunnel_to_proxy = cpu_to_be32(
652 FW_OFLD_TX_DATA_WR_FLUSH(1) |
653 FW_OFLD_TX_DATA_WR_SHOVE(1));
655 mpa = (struct mpa_message *)(req + 1);
656 memset(mpa, 0, sizeof(*mpa));
657 memcpy(mpa->key, MPA_KEY_REP, sizeof(mpa->key));
658 mpa->flags = (ep->mpa_attr.crc_enabled ? MPA_CRC : 0) |
659 (markers_enabled ? MPA_MARKERS : 0);
660 mpa->revision = mpa_rev;
661 mpa->private_data_size = htons(plen);
663 memcpy(mpa->private_data, pdata, plen);
666 * Reference the mpa skb. This ensures the data area
667 * will remain in memory until the hw acks the tx.
668 * Function fw4_ack() will deref it.
671 t4_set_arp_err_handler(skb, NULL, arp_failure_discard);
673 state_set(&ep->com, MPA_REP_SENT);
674 return c4iw_l2t_send(&ep->com.dev->rdev, skb, ep->l2t);
677 static int act_establish(struct c4iw_dev *dev, struct sk_buff *skb)
680 struct cpl_act_establish *req = cplhdr(skb);
681 unsigned int tid = GET_TID(req);
682 unsigned int atid = GET_TID_TID(ntohl(req->tos_atid));
683 struct tid_info *t = dev->rdev.lldi.tids;
685 ep = lookup_atid(t, atid);
687 PDBG("%s ep %p tid %u snd_isn %u rcv_isn %u\n", __func__, ep, tid,
688 be32_to_cpu(req->snd_isn), be32_to_cpu(req->rcv_isn));
690 dst_confirm(ep->dst);
692 /* setup the hwtid for this connection */
694 cxgb4_insert_tid(t, ep, tid);
696 ep->snd_seq = be32_to_cpu(req->snd_isn);
697 ep->rcv_seq = be32_to_cpu(req->rcv_isn);
699 set_emss(ep, ntohs(req->tcp_opt));
701 /* dealloc the atid */
702 cxgb4_free_atid(t, atid);
704 /* start MPA negotiation */
705 send_flowc(ep, NULL);
706 send_mpa_req(ep, skb);
711 static void close_complete_upcall(struct c4iw_ep *ep)
713 struct iw_cm_event event;
715 PDBG("%s ep %p tid %u\n", __func__, ep, ep->hwtid);
716 memset(&event, 0, sizeof(event));
717 event.event = IW_CM_EVENT_CLOSE;
719 PDBG("close complete delivered ep %p cm_id %p tid %u\n",
720 ep, ep->com.cm_id, ep->hwtid);
721 ep->com.cm_id->event_handler(ep->com.cm_id, &event);
722 ep->com.cm_id->rem_ref(ep->com.cm_id);
723 ep->com.cm_id = NULL;
728 static int abort_connection(struct c4iw_ep *ep, struct sk_buff *skb, gfp_t gfp)
730 PDBG("%s ep %p tid %u\n", __func__, ep, ep->hwtid);
731 close_complete_upcall(ep);
732 state_set(&ep->com, ABORTING);
733 return send_abort(ep, skb, gfp);
736 static void peer_close_upcall(struct c4iw_ep *ep)
738 struct iw_cm_event event;
740 PDBG("%s ep %p tid %u\n", __func__, ep, ep->hwtid);
741 memset(&event, 0, sizeof(event));
742 event.event = IW_CM_EVENT_DISCONNECT;
744 PDBG("peer close delivered ep %p cm_id %p tid %u\n",
745 ep, ep->com.cm_id, ep->hwtid);
746 ep->com.cm_id->event_handler(ep->com.cm_id, &event);
750 static void peer_abort_upcall(struct c4iw_ep *ep)
752 struct iw_cm_event event;
754 PDBG("%s ep %p tid %u\n", __func__, ep, ep->hwtid);
755 memset(&event, 0, sizeof(event));
756 event.event = IW_CM_EVENT_CLOSE;
757 event.status = -ECONNRESET;
759 PDBG("abort delivered ep %p cm_id %p tid %u\n", ep,
760 ep->com.cm_id, ep->hwtid);
761 ep->com.cm_id->event_handler(ep->com.cm_id, &event);
762 ep->com.cm_id->rem_ref(ep->com.cm_id);
763 ep->com.cm_id = NULL;
768 static void connect_reply_upcall(struct c4iw_ep *ep, int status)
770 struct iw_cm_event event;
772 PDBG("%s ep %p tid %u status %d\n", __func__, ep, ep->hwtid, status);
773 memset(&event, 0, sizeof(event));
774 event.event = IW_CM_EVENT_CONNECT_REPLY;
775 event.status = status;
776 event.local_addr = ep->com.local_addr;
777 event.remote_addr = ep->com.remote_addr;
779 if ((status == 0) || (status == -ECONNREFUSED)) {
780 event.private_data_len = ep->plen;
781 event.private_data = ep->mpa_pkt + sizeof(struct mpa_message);
784 PDBG("%s ep %p tid %u status %d\n", __func__, ep,
786 ep->com.cm_id->event_handler(ep->com.cm_id, &event);
789 ep->com.cm_id->rem_ref(ep->com.cm_id);
790 ep->com.cm_id = NULL;
795 static void connect_request_upcall(struct c4iw_ep *ep)
797 struct iw_cm_event event;
799 PDBG("%s ep %p tid %u\n", __func__, ep, ep->hwtid);
800 memset(&event, 0, sizeof(event));
801 event.event = IW_CM_EVENT_CONNECT_REQUEST;
802 event.local_addr = ep->com.local_addr;
803 event.remote_addr = ep->com.remote_addr;
804 event.private_data_len = ep->plen;
805 event.private_data = ep->mpa_pkt + sizeof(struct mpa_message);
806 event.provider_data = ep;
807 if (state_read(&ep->parent_ep->com) != DEAD) {
808 c4iw_get_ep(&ep->com);
809 ep->parent_ep->com.cm_id->event_handler(
810 ep->parent_ep->com.cm_id,
813 c4iw_put_ep(&ep->parent_ep->com);
814 ep->parent_ep = NULL;
817 static void established_upcall(struct c4iw_ep *ep)
819 struct iw_cm_event event;
821 PDBG("%s ep %p tid %u\n", __func__, ep, ep->hwtid);
822 memset(&event, 0, sizeof(event));
823 event.event = IW_CM_EVENT_ESTABLISHED;
825 PDBG("%s ep %p tid %u\n", __func__, ep, ep->hwtid);
826 ep->com.cm_id->event_handler(ep->com.cm_id, &event);
830 static int update_rx_credits(struct c4iw_ep *ep, u32 credits)
832 struct cpl_rx_data_ack *req;
834 int wrlen = roundup(sizeof *req, 16);
836 PDBG("%s ep %p tid %u credits %u\n", __func__, ep, ep->hwtid, credits);
837 skb = get_skb(NULL, wrlen, GFP_KERNEL);
839 printk(KERN_ERR MOD "update_rx_credits - cannot alloc skb!\n");
843 req = (struct cpl_rx_data_ack *) skb_put(skb, wrlen);
844 memset(req, 0, wrlen);
845 INIT_TP_WR(req, ep->hwtid);
846 OPCODE_TID(req) = cpu_to_be32(MK_OPCODE_TID(CPL_RX_DATA_ACK,
848 req->credit_dack = cpu_to_be32(credits);
849 set_wr_txq(skb, CPL_PRIORITY_ACK, ep->txq_idx);
850 c4iw_ofld_send(&ep->com.dev->rdev, skb);
854 static void process_mpa_reply(struct c4iw_ep *ep, struct sk_buff *skb)
856 struct mpa_message *mpa;
858 struct c4iw_qp_attributes attrs;
859 enum c4iw_qp_attr_mask mask;
862 PDBG("%s ep %p tid %u\n", __func__, ep, ep->hwtid);
865 * Stop mpa timer. If it expired, then the state has
866 * changed and we bail since ep_timeout already aborted
870 if (state_read(&ep->com) != MPA_REQ_SENT)
874 * If we get more than the supported amount of private data
875 * then we must fail this connection.
877 if (ep->mpa_pkt_len + skb->len > sizeof(ep->mpa_pkt)) {
883 * copy the new data into our accumulation buffer.
885 skb_copy_from_linear_data(skb, &(ep->mpa_pkt[ep->mpa_pkt_len]),
887 ep->mpa_pkt_len += skb->len;
890 * if we don't even have the mpa message, then bail.
892 if (ep->mpa_pkt_len < sizeof(*mpa))
894 mpa = (struct mpa_message *) ep->mpa_pkt;
896 /* Validate MPA header. */
897 if (mpa->revision != mpa_rev) {
901 if (memcmp(mpa->key, MPA_KEY_REP, sizeof(mpa->key))) {
906 plen = ntohs(mpa->private_data_size);
909 * Fail if there's too much private data.
911 if (plen > MPA_MAX_PRIVATE_DATA) {
917 * If plen does not account for pkt size
919 if (ep->mpa_pkt_len > (sizeof(*mpa) + plen)) {
924 ep->plen = (u8) plen;
927 * If we don't have all the pdata yet, then bail.
928 * We'll continue process when more data arrives.
930 if (ep->mpa_pkt_len < (sizeof(*mpa) + plen))
933 if (mpa->flags & MPA_REJECT) {
939 * If we get here we have accumulated the entire mpa
940 * start reply message including private data. And
941 * the MPA header is valid.
943 state_set(&ep->com, FPDU_MODE);
944 ep->mpa_attr.crc_enabled = (mpa->flags & MPA_CRC) | crc_enabled ? 1 : 0;
945 ep->mpa_attr.recv_marker_enabled = markers_enabled;
946 ep->mpa_attr.xmit_marker_enabled = mpa->flags & MPA_MARKERS ? 1 : 0;
947 ep->mpa_attr.version = mpa_rev;
948 ep->mpa_attr.p2p_type = peer2peer ? p2p_type :
949 FW_RI_INIT_P2PTYPE_DISABLED;
950 PDBG("%s - crc_enabled=%d, recv_marker_enabled=%d, "
951 "xmit_marker_enabled=%d, version=%d\n", __func__,
952 ep->mpa_attr.crc_enabled, ep->mpa_attr.recv_marker_enabled,
953 ep->mpa_attr.xmit_marker_enabled, ep->mpa_attr.version);
955 attrs.mpa_attr = ep->mpa_attr;
956 attrs.max_ird = ep->ird;
957 attrs.max_ord = ep->ord;
958 attrs.llp_stream_handle = ep;
959 attrs.next_state = C4IW_QP_STATE_RTS;
961 mask = C4IW_QP_ATTR_NEXT_STATE |
962 C4IW_QP_ATTR_LLP_STREAM_HANDLE | C4IW_QP_ATTR_MPA_ATTR |
963 C4IW_QP_ATTR_MAX_IRD | C4IW_QP_ATTR_MAX_ORD;
965 /* bind QP and TID with INIT_WR */
966 err = c4iw_modify_qp(ep->com.qp->rhp,
967 ep->com.qp, mask, &attrs, 1);
972 state_set(&ep->com, ABORTING);
973 send_abort(ep, skb, GFP_KERNEL);
975 connect_reply_upcall(ep, err);
979 static void process_mpa_request(struct c4iw_ep *ep, struct sk_buff *skb)
981 struct mpa_message *mpa;
984 PDBG("%s ep %p tid %u\n", __func__, ep, ep->hwtid);
986 if (state_read(&ep->com) != MPA_REQ_WAIT)
990 * If we get more than the supported amount of private data
991 * then we must fail this connection.
993 if (ep->mpa_pkt_len + skb->len > sizeof(ep->mpa_pkt)) {
995 abort_connection(ep, skb, GFP_KERNEL);
999 PDBG("%s enter (%s line %u)\n", __func__, __FILE__, __LINE__);
1002 * Copy the new data into our accumulation buffer.
1004 skb_copy_from_linear_data(skb, &(ep->mpa_pkt[ep->mpa_pkt_len]),
1006 ep->mpa_pkt_len += skb->len;
1009 * If we don't even have the mpa message, then bail.
1010 * We'll continue process when more data arrives.
1012 if (ep->mpa_pkt_len < sizeof(*mpa))
1015 PDBG("%s enter (%s line %u)\n", __func__, __FILE__, __LINE__);
1017 mpa = (struct mpa_message *) ep->mpa_pkt;
1020 * Validate MPA Header.
1022 if (mpa->revision != mpa_rev) {
1023 abort_connection(ep, skb, GFP_KERNEL);
1027 if (memcmp(mpa->key, MPA_KEY_REQ, sizeof(mpa->key))) {
1028 abort_connection(ep, skb, GFP_KERNEL);
1032 plen = ntohs(mpa->private_data_size);
1035 * Fail if there's too much private data.
1037 if (plen > MPA_MAX_PRIVATE_DATA) {
1038 abort_connection(ep, skb, GFP_KERNEL);
1043 * If plen does not account for pkt size
1045 if (ep->mpa_pkt_len > (sizeof(*mpa) + plen)) {
1046 abort_connection(ep, skb, GFP_KERNEL);
1049 ep->plen = (u8) plen;
1052 * If we don't have all the pdata yet, then bail.
1054 if (ep->mpa_pkt_len < (sizeof(*mpa) + plen))
1058 * If we get here we have accumulated the entire mpa
1059 * start reply message including private data.
1061 ep->mpa_attr.initiator = 0;
1062 ep->mpa_attr.crc_enabled = (mpa->flags & MPA_CRC) | crc_enabled ? 1 : 0;
1063 ep->mpa_attr.recv_marker_enabled = markers_enabled;
1064 ep->mpa_attr.xmit_marker_enabled = mpa->flags & MPA_MARKERS ? 1 : 0;
1065 ep->mpa_attr.version = mpa_rev;
1066 ep->mpa_attr.p2p_type = peer2peer ? p2p_type :
1067 FW_RI_INIT_P2PTYPE_DISABLED;
1068 PDBG("%s - crc_enabled=%d, recv_marker_enabled=%d, "
1069 "xmit_marker_enabled=%d, version=%d p2p_type=%d\n", __func__,
1070 ep->mpa_attr.crc_enabled, ep->mpa_attr.recv_marker_enabled,
1071 ep->mpa_attr.xmit_marker_enabled, ep->mpa_attr.version,
1072 ep->mpa_attr.p2p_type);
1074 state_set(&ep->com, MPA_REQ_RCVD);
1077 connect_request_upcall(ep);
1081 static int rx_data(struct c4iw_dev *dev, struct sk_buff *skb)
1084 struct cpl_rx_data *hdr = cplhdr(skb);
1085 unsigned int dlen = ntohs(hdr->len);
1086 unsigned int tid = GET_TID(hdr);
1087 struct tid_info *t = dev->rdev.lldi.tids;
1089 ep = lookup_tid(t, tid);
1090 PDBG("%s ep %p tid %u dlen %u\n", __func__, ep, ep->hwtid, dlen);
1091 skb_pull(skb, sizeof(*hdr));
1092 skb_trim(skb, dlen);
1094 ep->rcv_seq += dlen;
1095 BUG_ON(ep->rcv_seq != (ntohl(hdr->seq) + dlen));
1097 /* update RX credits */
1098 update_rx_credits(ep, dlen);
1100 switch (state_read(&ep->com)) {
1102 process_mpa_reply(ep, skb);
1105 process_mpa_request(ep, skb);
1110 printk(KERN_ERR MOD "%s Unexpected streaming data."
1111 " ep %p state %d tid %u\n",
1112 __func__, ep, state_read(&ep->com), ep->hwtid);
1115 * The ep will timeout and inform the ULP of the failure.
1123 static int abort_rpl(struct c4iw_dev *dev, struct sk_buff *skb)
1126 struct cpl_abort_rpl_rss *rpl = cplhdr(skb);
1127 unsigned long flags;
1129 unsigned int tid = GET_TID(rpl);
1130 struct tid_info *t = dev->rdev.lldi.tids;
1132 ep = lookup_tid(t, tid);
1133 PDBG("%s ep %p tid %u\n", __func__, ep, ep->hwtid);
1135 spin_lock_irqsave(&ep->com.lock, flags);
1136 switch (ep->com.state) {
1138 __state_set(&ep->com, DEAD);
1142 printk(KERN_ERR "%s ep %p state %d\n",
1143 __func__, ep, ep->com.state);
1146 spin_unlock_irqrestore(&ep->com.lock, flags);
1149 release_ep_resources(ep);
1154 * Return whether a failed active open has allocated a TID
1156 static inline int act_open_has_tid(int status)
1158 return status != CPL_ERR_TCAM_FULL && status != CPL_ERR_CONN_EXIST &&
1159 status != CPL_ERR_ARP_MISS;
1162 static int act_open_rpl(struct c4iw_dev *dev, struct sk_buff *skb)
1165 struct cpl_act_open_rpl *rpl = cplhdr(skb);
1166 unsigned int atid = GET_TID_TID(GET_AOPEN_ATID(
1167 ntohl(rpl->atid_status)));
1168 struct tid_info *t = dev->rdev.lldi.tids;
1169 int status = GET_AOPEN_STATUS(ntohl(rpl->atid_status));
1171 ep = lookup_atid(t, atid);
1173 PDBG("%s ep %p atid %u status %u errno %d\n", __func__, ep, atid,
1174 status, status2errno(status));
1176 if (status == CPL_ERR_RTX_NEG_ADVICE) {
1177 printk(KERN_WARNING MOD "Connection problems for atid %u\n",
1182 connect_reply_upcall(ep, status2errno(status));
1183 state_set(&ep->com, DEAD);
1185 if (status && act_open_has_tid(status))
1186 cxgb4_remove_tid(ep->com.dev->rdev.lldi.tids, 0, GET_TID(rpl));
1188 cxgb4_free_atid(t, atid);
1189 dst_release(ep->dst);
1190 cxgb4_l2t_release(ep->l2t);
1191 c4iw_put_ep(&ep->com);
1196 static int pass_open_rpl(struct c4iw_dev *dev, struct sk_buff *skb)
1198 struct cpl_pass_open_rpl *rpl = cplhdr(skb);
1199 struct tid_info *t = dev->rdev.lldi.tids;
1200 unsigned int stid = GET_TID(rpl);
1201 struct c4iw_listen_ep *ep = lookup_stid(t, stid);
1204 printk(KERN_ERR MOD "stid %d lookup failure!\n", stid);
1207 PDBG("%s ep %p status %d error %d\n", __func__, ep,
1208 rpl->status, status2errno(rpl->status));
1209 ep->com.rpl_err = status2errno(rpl->status);
1210 ep->com.rpl_done = 1;
1211 wake_up(&ep->com.waitq);
1216 static int listen_stop(struct c4iw_listen_ep *ep)
1218 struct sk_buff *skb;
1219 struct cpl_close_listsvr_req *req;
1221 PDBG("%s ep %p\n", __func__, ep);
1222 skb = get_skb(NULL, sizeof(*req), GFP_KERNEL);
1224 printk(KERN_ERR MOD "%s - failed to alloc skb\n", __func__);
1227 req = (struct cpl_close_listsvr_req *) skb_put(skb, sizeof(*req));
1229 OPCODE_TID(req) = cpu_to_be32(MK_OPCODE_TID(CPL_CLOSE_LISTSRV_REQ,
1231 req->reply_ctrl = cpu_to_be16(
1232 QUEUENO(ep->com.dev->rdev.lldi.rxq_ids[0]));
1233 set_wr_txq(skb, CPL_PRIORITY_SETUP, 0);
1234 return c4iw_ofld_send(&ep->com.dev->rdev, skb);
1237 static int close_listsrv_rpl(struct c4iw_dev *dev, struct sk_buff *skb)
1239 struct cpl_close_listsvr_rpl *rpl = cplhdr(skb);
1240 struct tid_info *t = dev->rdev.lldi.tids;
1241 unsigned int stid = GET_TID(rpl);
1242 struct c4iw_listen_ep *ep = lookup_stid(t, stid);
1244 PDBG("%s ep %p\n", __func__, ep);
1245 ep->com.rpl_err = status2errno(rpl->status);
1246 ep->com.rpl_done = 1;
1247 wake_up(&ep->com.waitq);
1251 static void accept_cr(struct c4iw_ep *ep, __be32 peer_ip, struct sk_buff *skb,
1252 struct cpl_pass_accept_req *req)
1254 struct cpl_pass_accept_rpl *rpl;
1255 unsigned int mtu_idx;
1260 PDBG("%s ep %p tid %u\n", __func__, ep, ep->hwtid);
1261 BUG_ON(skb_cloned(skb));
1262 skb_trim(skb, sizeof(*rpl));
1264 cxgb4_best_mtu(ep->com.dev->rdev.lldi.mtus, ep->mtu, &mtu_idx);
1265 wscale = compute_wscale(rcv_win);
1266 opt0 = KEEP_ALIVE(1) |
1269 L2T_IDX(ep->l2t->idx) |
1270 TX_CHAN(ep->tx_chan) |
1271 SMAC_SEL(ep->smac_idx) |
1273 RCV_BUFSIZ(rcv_win>>10);
1274 opt2 = RX_CHANNEL(0) |
1275 RSS_QUEUE_VALID | RSS_QUEUE(ep->rss_qid);
1277 if (enable_tcp_timestamps && req->tcpopt.tstamp)
1278 opt2 |= TSTAMPS_EN(1);
1279 if (enable_tcp_sack && req->tcpopt.sack)
1281 if (wscale && enable_tcp_window_scaling)
1282 opt2 |= WND_SCALE_EN(1);
1285 INIT_TP_WR(rpl, ep->hwtid);
1286 OPCODE_TID(rpl) = cpu_to_be32(MK_OPCODE_TID(CPL_PASS_ACCEPT_RPL,
1288 rpl->opt0 = cpu_to_be64(opt0);
1289 rpl->opt2 = cpu_to_be32(opt2);
1290 set_wr_txq(skb, CPL_PRIORITY_SETUP, ep->txq_idx);
1291 c4iw_l2t_send(&ep->com.dev->rdev, skb, ep->l2t);
1296 static void reject_cr(struct c4iw_dev *dev, u32 hwtid, __be32 peer_ip,
1297 struct sk_buff *skb)
1299 PDBG("%s c4iw_dev %p tid %u peer_ip %x\n", __func__, dev, hwtid,
1301 BUG_ON(skb_cloned(skb));
1302 skb_trim(skb, sizeof(struct cpl_tid_release));
1304 release_tid(&dev->rdev, hwtid, skb);
1308 static void get_4tuple(struct cpl_pass_accept_req *req,
1309 __be32 *local_ip, __be32 *peer_ip,
1310 __be16 *local_port, __be16 *peer_port)
1312 int eth_len = G_ETH_HDR_LEN(be32_to_cpu(req->hdr_len));
1313 int ip_len = G_IP_HDR_LEN(be32_to_cpu(req->hdr_len));
1314 struct iphdr *ip = (struct iphdr *)((u8 *)(req + 1) + eth_len);
1315 struct tcphdr *tcp = (struct tcphdr *)
1316 ((u8 *)(req + 1) + eth_len + ip_len);
1318 PDBG("%s saddr 0x%x daddr 0x%x sport %u dport %u\n", __func__,
1319 ntohl(ip->saddr), ntohl(ip->daddr), ntohs(tcp->source),
1322 *peer_ip = ip->saddr;
1323 *local_ip = ip->daddr;
1324 *peer_port = tcp->source;
1325 *local_port = tcp->dest;
1330 static int pass_accept_req(struct c4iw_dev *dev, struct sk_buff *skb)
1332 struct c4iw_ep *child_ep, *parent_ep;
1333 struct cpl_pass_accept_req *req = cplhdr(skb);
1334 unsigned int stid = GET_POPEN_TID(ntohl(req->tos_stid));
1335 struct tid_info *t = dev->rdev.lldi.tids;
1336 unsigned int hwtid = GET_TID(req);
1337 struct dst_entry *dst;
1338 struct l2t_entry *l2t;
1340 __be32 local_ip, peer_ip;
1341 __be16 local_port, peer_port;
1342 struct net_device *pdev;
1343 u32 tx_chan, smac_idx;
1349 parent_ep = lookup_stid(t, stid);
1350 PDBG("%s parent ep %p tid %u\n", __func__, parent_ep, hwtid);
1352 get_4tuple(req, &local_ip, &peer_ip, &local_port, &peer_port);
1354 if (state_read(&parent_ep->com) != LISTEN) {
1355 printk(KERN_ERR "%s - listening ep not in LISTEN\n",
1360 /* Find output route */
1361 rt = find_route(dev, local_ip, peer_ip, local_port, peer_port,
1362 GET_POPEN_TOS(ntohl(req->tos_stid)));
1364 printk(KERN_ERR MOD "%s - failed to find dst entry!\n",
1369 if (dst->neighbour->dev->flags & IFF_LOOPBACK) {
1370 pdev = ip_dev_find(&init_net, peer_ip);
1372 l2t = cxgb4_l2t_get(dev->rdev.lldi.l2t, dst->neighbour,
1375 tx_chan = cxgb4_port_chan(pdev);
1376 smac_idx = (cxgb4_port_viid(pdev) & 0x7F) << 1;
1377 step = dev->rdev.lldi.ntxq / dev->rdev.lldi.nchan;
1378 txq_idx = cxgb4_port_idx(pdev) * step;
1379 step = dev->rdev.lldi.nrxq / dev->rdev.lldi.nchan;
1380 rss_qid = dev->rdev.lldi.rxq_ids[cxgb4_port_idx(pdev) * step];
1383 l2t = cxgb4_l2t_get(dev->rdev.lldi.l2t, dst->neighbour,
1384 dst->neighbour->dev, 0);
1386 tx_chan = cxgb4_port_chan(dst->neighbour->dev);
1387 smac_idx = (cxgb4_port_viid(dst->neighbour->dev) & 0x7F) << 1;
1388 step = dev->rdev.lldi.ntxq / dev->rdev.lldi.nchan;
1389 txq_idx = cxgb4_port_idx(dst->neighbour->dev) * step;
1390 step = dev->rdev.lldi.nrxq / dev->rdev.lldi.nchan;
1391 rss_qid = dev->rdev.lldi.rxq_ids[
1392 cxgb4_port_idx(dst->neighbour->dev) * step];
1395 printk(KERN_ERR MOD "%s - failed to allocate l2t entry!\n",
1401 child_ep = alloc_ep(sizeof(*child_ep), GFP_KERNEL);
1403 printk(KERN_ERR MOD "%s - failed to allocate ep entry!\n",
1405 cxgb4_l2t_release(l2t);
1409 state_set(&child_ep->com, CONNECTING);
1410 child_ep->com.dev = dev;
1411 child_ep->com.cm_id = NULL;
1412 child_ep->com.local_addr.sin_family = PF_INET;
1413 child_ep->com.local_addr.sin_port = local_port;
1414 child_ep->com.local_addr.sin_addr.s_addr = local_ip;
1415 child_ep->com.remote_addr.sin_family = PF_INET;
1416 child_ep->com.remote_addr.sin_port = peer_port;
1417 child_ep->com.remote_addr.sin_addr.s_addr = peer_ip;
1418 c4iw_get_ep(&parent_ep->com);
1419 child_ep->parent_ep = parent_ep;
1420 child_ep->tos = GET_POPEN_TOS(ntohl(req->tos_stid));
1421 child_ep->l2t = l2t;
1422 child_ep->dst = dst;
1423 child_ep->hwtid = hwtid;
1424 child_ep->tx_chan = tx_chan;
1425 child_ep->smac_idx = smac_idx;
1426 child_ep->rss_qid = rss_qid;
1427 child_ep->mtu = mtu;
1428 child_ep->txq_idx = txq_idx;
1430 PDBG("%s tx_chan %u smac_idx %u rss_qid %u\n", __func__,
1431 tx_chan, smac_idx, rss_qid);
1433 init_timer(&child_ep->timer);
1434 cxgb4_insert_tid(t, child_ep, hwtid);
1435 accept_cr(child_ep, peer_ip, skb, req);
1438 reject_cr(dev, hwtid, peer_ip, skb);
1443 static int pass_establish(struct c4iw_dev *dev, struct sk_buff *skb)
1446 struct cpl_pass_establish *req = cplhdr(skb);
1447 struct tid_info *t = dev->rdev.lldi.tids;
1448 unsigned int tid = GET_TID(req);
1450 ep = lookup_tid(t, tid);
1451 PDBG("%s ep %p tid %u\n", __func__, ep, ep->hwtid);
1452 ep->snd_seq = be32_to_cpu(req->snd_isn);
1453 ep->rcv_seq = be32_to_cpu(req->rcv_isn);
1455 set_emss(ep, ntohs(req->tcp_opt));
1457 dst_confirm(ep->dst);
1458 state_set(&ep->com, MPA_REQ_WAIT);
1460 send_flowc(ep, skb);
1465 static int peer_close(struct c4iw_dev *dev, struct sk_buff *skb)
1467 struct cpl_peer_close *hdr = cplhdr(skb);
1469 struct c4iw_qp_attributes attrs;
1470 unsigned long flags;
1474 struct tid_info *t = dev->rdev.lldi.tids;
1475 unsigned int tid = GET_TID(hdr);
1476 int start_timer = 0;
1479 ep = lookup_tid(t, tid);
1480 PDBG("%s ep %p tid %u\n", __func__, ep, ep->hwtid);
1481 dst_confirm(ep->dst);
1483 spin_lock_irqsave(&ep->com.lock, flags);
1484 switch (ep->com.state) {
1486 __state_set(&ep->com, CLOSING);
1489 __state_set(&ep->com, CLOSING);
1490 connect_reply_upcall(ep, -ECONNRESET);
1495 * We're gonna mark this puppy DEAD, but keep
1496 * the reference on it until the ULP accepts or
1497 * rejects the CR. Also wake up anyone waiting
1498 * in rdma connection migration (see c4iw_accept_cr()).
1500 __state_set(&ep->com, CLOSING);
1501 ep->com.rpl_done = 1;
1502 ep->com.rpl_err = -ECONNRESET;
1503 PDBG("waking up ep %p tid %u\n", ep, ep->hwtid);
1504 wake_up(&ep->com.waitq);
1507 __state_set(&ep->com, CLOSING);
1508 ep->com.rpl_done = 1;
1509 ep->com.rpl_err = -ECONNRESET;
1510 PDBG("waking up ep %p tid %u\n", ep, ep->hwtid);
1511 wake_up(&ep->com.waitq);
1515 __state_set(&ep->com, CLOSING);
1517 peer_close_upcall(ep);
1523 __state_set(&ep->com, MORIBUND);
1528 if (ep->com.cm_id && ep->com.qp) {
1529 attrs.next_state = C4IW_QP_STATE_IDLE;
1530 c4iw_modify_qp(ep->com.qp->rhp, ep->com.qp,
1531 C4IW_QP_ATTR_NEXT_STATE, &attrs, 1);
1533 close_complete_upcall(ep);
1534 __state_set(&ep->com, DEAD);
1544 spin_unlock_irqrestore(&ep->com.lock, flags);
1546 attrs.next_state = C4IW_QP_STATE_CLOSING;
1547 c4iw_modify_qp(ep->com.qp->rhp, ep->com.qp,
1548 C4IW_QP_ATTR_NEXT_STATE, &attrs, 1);
1555 c4iw_ep_disconnect(ep, 0, GFP_KERNEL);
1557 release_ep_resources(ep);
1562 * Returns whether an ABORT_REQ_RSS message is a negative advice.
1564 static int is_neg_adv_abort(unsigned int status)
1566 return status == CPL_ERR_RTX_NEG_ADVICE ||
1567 status == CPL_ERR_PERSIST_NEG_ADVICE;
1570 static int peer_abort(struct c4iw_dev *dev, struct sk_buff *skb)
1572 struct cpl_abort_req_rss *req = cplhdr(skb);
1574 struct cpl_abort_rpl *rpl;
1575 struct sk_buff *rpl_skb;
1576 struct c4iw_qp_attributes attrs;
1579 unsigned long flags;
1580 struct tid_info *t = dev->rdev.lldi.tids;
1581 unsigned int tid = GET_TID(req);
1584 ep = lookup_tid(t, tid);
1585 if (is_neg_adv_abort(req->status)) {
1586 PDBG("%s neg_adv_abort ep %p tid %u\n", __func__, ep,
1590 spin_lock_irqsave(&ep->com.lock, flags);
1591 PDBG("%s ep %p tid %u state %u\n", __func__, ep, ep->hwtid,
1593 switch (ep->com.state) {
1601 connect_reply_upcall(ep, -ECONNRESET);
1604 ep->com.rpl_done = 1;
1605 ep->com.rpl_err = -ECONNRESET;
1606 PDBG("waking up ep %p\n", ep);
1607 wake_up(&ep->com.waitq);
1612 * We're gonna mark this puppy DEAD, but keep
1613 * the reference on it until the ULP accepts or
1614 * rejects the CR. Also wake up anyone waiting
1615 * in rdma connection migration (see c4iw_accept_cr()).
1617 ep->com.rpl_done = 1;
1618 ep->com.rpl_err = -ECONNRESET;
1619 PDBG("waking up ep %p tid %u\n", ep, ep->hwtid);
1620 wake_up(&ep->com.waitq);
1627 if (ep->com.cm_id && ep->com.qp) {
1628 attrs.next_state = C4IW_QP_STATE_ERROR;
1629 ret = c4iw_modify_qp(ep->com.qp->rhp,
1630 ep->com.qp, C4IW_QP_ATTR_NEXT_STATE,
1634 "%s - qp <- error failed!\n",
1637 peer_abort_upcall(ep);
1642 PDBG("%s PEER_ABORT IN DEAD STATE!!!!\n", __func__);
1643 spin_unlock_irqrestore(&ep->com.lock, flags);
1649 dst_confirm(ep->dst);
1650 if (ep->com.state != ABORTING) {
1651 __state_set(&ep->com, DEAD);
1654 spin_unlock_irqrestore(&ep->com.lock, flags);
1656 rpl_skb = get_skb(skb, sizeof(*rpl), GFP_KERNEL);
1658 printk(KERN_ERR MOD "%s - cannot allocate skb!\n",
1663 set_wr_txq(skb, CPL_PRIORITY_DATA, ep->txq_idx);
1664 rpl = (struct cpl_abort_rpl *) skb_put(rpl_skb, sizeof(*rpl));
1665 INIT_TP_WR(rpl, ep->hwtid);
1666 OPCODE_TID(rpl) = cpu_to_be32(MK_OPCODE_TID(CPL_ABORT_RPL, ep->hwtid));
1667 rpl->cmd = CPL_ABORT_NO_RST;
1668 c4iw_ofld_send(&ep->com.dev->rdev, rpl_skb);
1673 release_ep_resources(ep);
1677 static int close_con_rpl(struct c4iw_dev *dev, struct sk_buff *skb)
1680 struct c4iw_qp_attributes attrs;
1681 struct cpl_close_con_rpl *rpl = cplhdr(skb);
1682 unsigned long flags;
1684 struct tid_info *t = dev->rdev.lldi.tids;
1685 unsigned int tid = GET_TID(rpl);
1688 ep = lookup_tid(t, tid);
1690 PDBG("%s ep %p tid %u\n", __func__, ep, ep->hwtid);
1693 /* The cm_id may be null if we failed to connect */
1694 spin_lock_irqsave(&ep->com.lock, flags);
1695 switch (ep->com.state) {
1697 __state_set(&ep->com, MORIBUND);
1701 if ((ep->com.cm_id) && (ep->com.qp)) {
1702 attrs.next_state = C4IW_QP_STATE_IDLE;
1703 c4iw_modify_qp(ep->com.qp->rhp,
1705 C4IW_QP_ATTR_NEXT_STATE,
1708 close_complete_upcall(ep);
1709 __state_set(&ep->com, DEAD);
1719 spin_unlock_irqrestore(&ep->com.lock, flags);
1723 release_ep_resources(ep);
1727 static int terminate(struct c4iw_dev *dev, struct sk_buff *skb)
1730 struct cpl_rdma_terminate *term = cplhdr(skb);
1731 struct tid_info *t = dev->rdev.lldi.tids;
1732 unsigned int tid = GET_TID(term);
1734 ep = lookup_tid(t, tid);
1736 if (state_read(&ep->com) != FPDU_MODE)
1739 PDBG("%s ep %p tid %u\n", __func__, ep, ep->hwtid);
1740 skb_pull(skb, sizeof *term);
1741 PDBG("%s saving %d bytes of term msg\n", __func__, skb->len);
1742 skb_copy_from_linear_data(skb, ep->com.qp->attr.terminate_buffer,
1744 ep->com.qp->attr.terminate_msg_len = skb->len;
1745 ep->com.qp->attr.is_terminate_local = 0;
1750 * Upcall from the adapter indicating data has been transmitted.
1751 * For us its just the single MPA request or reply. We can now free
1752 * the skb holding the mpa message.
1754 static int fw4_ack(struct c4iw_dev *dev, struct sk_buff *skb)
1757 struct cpl_fw4_ack *hdr = cplhdr(skb);
1758 u8 credits = hdr->credits;
1759 unsigned int tid = GET_TID(hdr);
1760 struct tid_info *t = dev->rdev.lldi.tids;
1763 ep = lookup_tid(t, tid);
1764 PDBG("%s ep %p tid %u credits %u\n", __func__, ep, ep->hwtid, credits);
1766 PDBG(KERN_ERR "%s 0 credit ack ep %p tid %u state %u\n",
1767 __func__, ep, ep->hwtid, state_read(&ep->com));
1771 dst_confirm(ep->dst);
1773 PDBG("%s last streaming msg ack ep %p tid %u state %u "
1774 "initiator %u freeing skb\n", __func__, ep, ep->hwtid,
1775 state_read(&ep->com), ep->mpa_attr.initiator ? 1 : 0);
1776 kfree_skb(ep->mpa_skb);
1782 int c4iw_reject_cr(struct iw_cm_id *cm_id, const void *pdata, u8 pdata_len)
1785 struct c4iw_ep *ep = to_ep(cm_id);
1786 PDBG("%s ep %p tid %u\n", __func__, ep, ep->hwtid);
1788 if (state_read(&ep->com) == DEAD) {
1789 c4iw_put_ep(&ep->com);
1792 BUG_ON(state_read(&ep->com) != MPA_REQ_RCVD);
1794 abort_connection(ep, NULL, GFP_KERNEL);
1796 err = send_mpa_reject(ep, pdata, pdata_len);
1797 err = c4iw_ep_disconnect(ep, 0, GFP_KERNEL);
1799 c4iw_put_ep(&ep->com);
1803 int c4iw_accept_cr(struct iw_cm_id *cm_id, struct iw_cm_conn_param *conn_param)
1806 struct c4iw_qp_attributes attrs;
1807 enum c4iw_qp_attr_mask mask;
1808 struct c4iw_ep *ep = to_ep(cm_id);
1809 struct c4iw_dev *h = to_c4iw_dev(cm_id->device);
1810 struct c4iw_qp *qp = get_qhp(h, conn_param->qpn);
1812 PDBG("%s ep %p tid %u\n", __func__, ep, ep->hwtid);
1813 if (state_read(&ep->com) == DEAD) {
1818 BUG_ON(state_read(&ep->com) != MPA_REQ_RCVD);
1821 if ((conn_param->ord > c4iw_max_read_depth) ||
1822 (conn_param->ird > c4iw_max_read_depth)) {
1823 abort_connection(ep, NULL, GFP_KERNEL);
1828 cm_id->add_ref(cm_id);
1829 ep->com.cm_id = cm_id;
1832 ep->ird = conn_param->ird;
1833 ep->ord = conn_param->ord;
1835 if (peer2peer && ep->ird == 0)
1838 PDBG("%s %d ird %d ord %d\n", __func__, __LINE__, ep->ird, ep->ord);
1840 /* bind QP to EP and move to RTS */
1841 attrs.mpa_attr = ep->mpa_attr;
1842 attrs.max_ird = ep->ird;
1843 attrs.max_ord = ep->ord;
1844 attrs.llp_stream_handle = ep;
1845 attrs.next_state = C4IW_QP_STATE_RTS;
1847 /* bind QP and TID with INIT_WR */
1848 mask = C4IW_QP_ATTR_NEXT_STATE |
1849 C4IW_QP_ATTR_LLP_STREAM_HANDLE |
1850 C4IW_QP_ATTR_MPA_ATTR |
1851 C4IW_QP_ATTR_MAX_IRD |
1852 C4IW_QP_ATTR_MAX_ORD;
1854 err = c4iw_modify_qp(ep->com.qp->rhp,
1855 ep->com.qp, mask, &attrs, 1);
1858 err = send_mpa_reply(ep, conn_param->private_data,
1859 conn_param->private_data_len);
1863 state_set(&ep->com, FPDU_MODE);
1864 established_upcall(ep);
1865 c4iw_put_ep(&ep->com);
1868 ep->com.cm_id = NULL;
1870 cm_id->rem_ref(cm_id);
1872 c4iw_put_ep(&ep->com);
1876 int c4iw_connect(struct iw_cm_id *cm_id, struct iw_cm_conn_param *conn_param)
1879 struct c4iw_dev *dev = to_c4iw_dev(cm_id->device);
1882 struct net_device *pdev;
1885 if ((conn_param->ord > c4iw_max_read_depth) ||
1886 (conn_param->ird > c4iw_max_read_depth)) {
1890 ep = alloc_ep(sizeof(*ep), GFP_KERNEL);
1892 printk(KERN_ERR MOD "%s - cannot alloc ep.\n", __func__);
1896 init_timer(&ep->timer);
1897 ep->plen = conn_param->private_data_len;
1899 memcpy(ep->mpa_pkt + sizeof(struct mpa_message),
1900 conn_param->private_data, ep->plen);
1901 ep->ird = conn_param->ird;
1902 ep->ord = conn_param->ord;
1904 if (peer2peer && ep->ord == 0)
1907 cm_id->add_ref(cm_id);
1909 ep->com.cm_id = cm_id;
1910 ep->com.qp = get_qhp(dev, conn_param->qpn);
1911 BUG_ON(!ep->com.qp);
1912 PDBG("%s qpn 0x%x qp %p cm_id %p\n", __func__, conn_param->qpn,
1916 * Allocate an active TID to initiate a TCP connection.
1918 ep->atid = cxgb4_alloc_atid(dev->rdev.lldi.tids, ep);
1919 if (ep->atid == -1) {
1920 printk(KERN_ERR MOD "%s - cannot alloc atid.\n", __func__);
1925 PDBG("%s saddr 0x%x sport 0x%x raddr 0x%x rport 0x%x\n", __func__,
1926 ntohl(cm_id->local_addr.sin_addr.s_addr),
1927 ntohs(cm_id->local_addr.sin_port),
1928 ntohl(cm_id->remote_addr.sin_addr.s_addr),
1929 ntohs(cm_id->remote_addr.sin_port));
1932 rt = find_route(dev,
1933 cm_id->local_addr.sin_addr.s_addr,
1934 cm_id->remote_addr.sin_addr.s_addr,
1935 cm_id->local_addr.sin_port,
1936 cm_id->remote_addr.sin_port, 0);
1938 printk(KERN_ERR MOD "%s - cannot find route.\n", __func__);
1939 err = -EHOSTUNREACH;
1942 ep->dst = &rt->u.dst;
1944 /* get a l2t entry */
1945 if (ep->dst->neighbour->dev->flags & IFF_LOOPBACK) {
1946 PDBG("%s LOOPBACK\n", __func__);
1947 pdev = ip_dev_find(&init_net,
1948 cm_id->remote_addr.sin_addr.s_addr);
1949 ep->l2t = cxgb4_l2t_get(ep->com.dev->rdev.lldi.l2t,
1952 ep->mtu = pdev->mtu;
1953 ep->tx_chan = cxgb4_port_chan(pdev);
1954 ep->smac_idx = (cxgb4_port_viid(pdev) & 0x7F) << 1;
1955 step = ep->com.dev->rdev.lldi.ntxq /
1956 ep->com.dev->rdev.lldi.nchan;
1957 ep->txq_idx = cxgb4_port_idx(pdev) * step;
1958 step = ep->com.dev->rdev.lldi.nrxq /
1959 ep->com.dev->rdev.lldi.nchan;
1960 ep->rss_qid = ep->com.dev->rdev.lldi.rxq_ids[
1961 cxgb4_port_idx(pdev) * step];
1964 ep->l2t = cxgb4_l2t_get(ep->com.dev->rdev.lldi.l2t,
1966 ep->dst->neighbour->dev, 0);
1967 ep->mtu = dst_mtu(ep->dst);
1968 ep->tx_chan = cxgb4_port_chan(ep->dst->neighbour->dev);
1969 ep->smac_idx = (cxgb4_port_viid(ep->dst->neighbour->dev) &
1971 step = ep->com.dev->rdev.lldi.ntxq /
1972 ep->com.dev->rdev.lldi.nchan;
1973 ep->txq_idx = cxgb4_port_idx(ep->dst->neighbour->dev) * step;
1974 step = ep->com.dev->rdev.lldi.nrxq /
1975 ep->com.dev->rdev.lldi.nchan;
1976 ep->rss_qid = ep->com.dev->rdev.lldi.rxq_ids[
1977 cxgb4_port_idx(ep->dst->neighbour->dev) * step];
1980 printk(KERN_ERR MOD "%s - cannot alloc l2e.\n", __func__);
1985 PDBG("%s txq_idx %u tx_chan %u smac_idx %u rss_qid %u l2t_idx %u\n",
1986 __func__, ep->txq_idx, ep->tx_chan, ep->smac_idx, ep->rss_qid,
1989 state_set(&ep->com, CONNECTING);
1991 ep->com.local_addr = cm_id->local_addr;
1992 ep->com.remote_addr = cm_id->remote_addr;
1994 /* send connect request to rnic */
1995 err = send_connect(ep);
1999 cxgb4_l2t_release(ep->l2t);
2001 dst_release(ep->dst);
2003 cxgb4_free_atid(ep->com.dev->rdev.lldi.tids, ep->atid);
2005 cm_id->rem_ref(cm_id);
2006 c4iw_put_ep(&ep->com);
2011 int c4iw_create_listen(struct iw_cm_id *cm_id, int backlog)
2014 struct c4iw_dev *dev = to_c4iw_dev(cm_id->device);
2015 struct c4iw_listen_ep *ep;
2020 ep = alloc_ep(sizeof(*ep), GFP_KERNEL);
2022 printk(KERN_ERR MOD "%s - cannot alloc ep.\n", __func__);
2026 PDBG("%s ep %p\n", __func__, ep);
2027 cm_id->add_ref(cm_id);
2028 ep->com.cm_id = cm_id;
2030 ep->backlog = backlog;
2031 ep->com.local_addr = cm_id->local_addr;
2034 * Allocate a server TID.
2036 ep->stid = cxgb4_alloc_stid(dev->rdev.lldi.tids, PF_INET, ep);
2037 if (ep->stid == -1) {
2038 printk(KERN_ERR MOD "%s - cannot alloc stid.\n", __func__);
2043 state_set(&ep->com, LISTEN);
2044 err = cxgb4_create_server(ep->com.dev->rdev.lldi.ports[0], ep->stid,
2045 ep->com.local_addr.sin_addr.s_addr,
2046 ep->com.local_addr.sin_port,
2047 ep->com.dev->rdev.lldi.rxq_ids[0]);
2051 /* wait for pass_open_rpl */
2052 wait_event(ep->com.waitq, ep->com.rpl_done);
2053 err = ep->com.rpl_err;
2055 cm_id->provider_data = ep;
2059 cxgb4_free_stid(ep->com.dev->rdev.lldi.tids, ep->stid, PF_INET);
2061 cm_id->rem_ref(cm_id);
2062 c4iw_put_ep(&ep->com);
2068 int c4iw_destroy_listen(struct iw_cm_id *cm_id)
2071 struct c4iw_listen_ep *ep = to_listen_ep(cm_id);
2073 PDBG("%s ep %p\n", __func__, ep);
2076 state_set(&ep->com, DEAD);
2077 ep->com.rpl_done = 0;
2078 ep->com.rpl_err = 0;
2079 err = listen_stop(ep);
2082 wait_event(ep->com.waitq, ep->com.rpl_done);
2083 cxgb4_free_stid(ep->com.dev->rdev.lldi.tids, ep->stid, PF_INET);
2085 err = ep->com.rpl_err;
2086 cm_id->rem_ref(cm_id);
2087 c4iw_put_ep(&ep->com);
2091 int c4iw_ep_disconnect(struct c4iw_ep *ep, int abrupt, gfp_t gfp)
2094 unsigned long flags;
2097 struct c4iw_rdev *rdev;
2098 int start_timer = 0;
2101 spin_lock_irqsave(&ep->com.lock, flags);
2103 PDBG("%s ep %p state %s, abrupt %d\n", __func__, ep,
2104 states[ep->com.state], abrupt);
2106 rdev = &ep->com.dev->rdev;
2107 if (c4iw_fatal_error(rdev)) {
2109 close_complete_upcall(ep);
2110 ep->com.state = DEAD;
2112 switch (ep->com.state) {
2120 ep->com.state = ABORTING;
2122 ep->com.state = CLOSING;
2125 set_bit(CLOSE_SENT, &ep->com.flags);
2128 if (!test_and_set_bit(CLOSE_SENT, &ep->com.flags)) {
2132 ep->com.state = ABORTING;
2134 ep->com.state = MORIBUND;
2140 PDBG("%s ignoring disconnect ep %p state %u\n",
2141 __func__, ep, ep->com.state);
2148 spin_unlock_irqrestore(&ep->com.lock, flags);
2155 ret = abort_connection(ep, NULL, gfp);
2157 ret = send_halfclose(ep, gfp);
2162 release_ep_resources(ep);
2167 * These are the real handlers that are called from a
2170 static c4iw_handler_func work_handlers[NUM_CPL_CMDS] = {
2171 [CPL_ACT_ESTABLISH] = act_establish,
2172 [CPL_ACT_OPEN_RPL] = act_open_rpl,
2173 [CPL_RX_DATA] = rx_data,
2174 [CPL_ABORT_RPL_RSS] = abort_rpl,
2175 [CPL_ABORT_RPL] = abort_rpl,
2176 [CPL_PASS_OPEN_RPL] = pass_open_rpl,
2177 [CPL_CLOSE_LISTSRV_RPL] = close_listsrv_rpl,
2178 [CPL_PASS_ACCEPT_REQ] = pass_accept_req,
2179 [CPL_PASS_ESTABLISH] = pass_establish,
2180 [CPL_PEER_CLOSE] = peer_close,
2181 [CPL_ABORT_REQ_RSS] = peer_abort,
2182 [CPL_CLOSE_CON_RPL] = close_con_rpl,
2183 [CPL_RDMA_TERMINATE] = terminate,
2184 [CPL_FW4_ACK] = fw4_ack
2187 static void process_timeout(struct c4iw_ep *ep)
2189 struct c4iw_qp_attributes attrs;
2192 spin_lock_irq(&ep->com.lock);
2193 PDBG("%s ep %p tid %u state %d\n", __func__, ep, ep->hwtid,
2195 switch (ep->com.state) {
2197 __state_set(&ep->com, ABORTING);
2198 connect_reply_upcall(ep, -ETIMEDOUT);
2201 __state_set(&ep->com, ABORTING);
2205 if (ep->com.cm_id && ep->com.qp) {
2206 attrs.next_state = C4IW_QP_STATE_ERROR;
2207 c4iw_modify_qp(ep->com.qp->rhp,
2208 ep->com.qp, C4IW_QP_ATTR_NEXT_STATE,
2211 __state_set(&ep->com, ABORTING);
2214 printk(KERN_ERR "%s unexpected state ep %p tid %u state %u\n",
2215 __func__, ep, ep->hwtid, ep->com.state);
2219 spin_unlock_irq(&ep->com.lock);
2221 abort_connection(ep, NULL, GFP_KERNEL);
2222 c4iw_put_ep(&ep->com);
2225 static void process_timedout_eps(void)
2229 spin_lock_irq(&timeout_lock);
2230 while (!list_empty(&timeout_list)) {
2231 struct list_head *tmp;
2233 tmp = timeout_list.next;
2235 spin_unlock_irq(&timeout_lock);
2236 ep = list_entry(tmp, struct c4iw_ep, entry);
2237 process_timeout(ep);
2238 spin_lock_irq(&timeout_lock);
2240 spin_unlock_irq(&timeout_lock);
2243 static void process_work(struct work_struct *work)
2245 struct sk_buff *skb = NULL;
2246 struct c4iw_dev *dev;
2247 struct cpl_act_establish *rpl = cplhdr(skb);
2248 unsigned int opcode;
2251 while ((skb = skb_dequeue(&rxq))) {
2253 dev = *((struct c4iw_dev **) (skb->cb + sizeof(void *)));
2254 opcode = rpl->ot.opcode;
2256 BUG_ON(!work_handlers[opcode]);
2257 ret = work_handlers[opcode](dev, skb);
2261 process_timedout_eps();
2264 static DECLARE_WORK(skb_work, process_work);
2266 static void ep_timeout(unsigned long arg)
2268 struct c4iw_ep *ep = (struct c4iw_ep *)arg;
2270 spin_lock(&timeout_lock);
2271 list_add_tail(&ep->entry, &timeout_list);
2272 spin_unlock(&timeout_lock);
2273 queue_work(workq, &skb_work);
2277 * All the CM events are handled on a work queue to have a safe context.
2279 static int sched(struct c4iw_dev *dev, struct sk_buff *skb)
2283 * Save dev in the skb->cb area.
2285 *((struct c4iw_dev **) (skb->cb + sizeof(void *))) = dev;
2288 * Queue the skb and schedule the worker thread.
2290 skb_queue_tail(&rxq, skb);
2291 queue_work(workq, &skb_work);
2295 static int set_tcb_rpl(struct c4iw_dev *dev, struct sk_buff *skb)
2297 struct cpl_set_tcb_rpl *rpl = cplhdr(skb);
2299 if (rpl->status != CPL_ERR_NONE) {
2300 printk(KERN_ERR MOD "Unexpected SET_TCB_RPL status %u "
2301 "for tid %u\n", rpl->status, GET_TID(rpl));
2306 static int fw6_msg(struct c4iw_dev *dev, struct sk_buff *skb)
2308 struct cpl_fw6_msg *rpl = cplhdr(skb);
2309 struct c4iw_wr_wait *wr_waitp;
2312 PDBG("%s type %u\n", __func__, rpl->type);
2314 switch (rpl->type) {
2316 ret = (int)((be64_to_cpu(rpl->data[0]) >> 8) & 0xff);
2317 wr_waitp = (__force struct c4iw_wr_wait *)rpl->data[1];
2318 PDBG("%s wr_waitp %p ret %u\n", __func__, wr_waitp, ret);
2320 wr_waitp->ret = ret;
2322 wake_up(&wr_waitp->wait);
2326 c4iw_ev_dispatch(dev, (struct t4_cqe *)&rpl->data[0]);
2329 printk(KERN_ERR MOD "%s unexpected fw6 msg type %u\n", __func__,
2337 * Most upcalls from the T4 Core go to sched() to
2338 * schedule the processing on a work queue.
2340 c4iw_handler_func c4iw_handlers[NUM_CPL_CMDS] = {
2341 [CPL_ACT_ESTABLISH] = sched,
2342 [CPL_ACT_OPEN_RPL] = sched,
2343 [CPL_RX_DATA] = sched,
2344 [CPL_ABORT_RPL_RSS] = sched,
2345 [CPL_ABORT_RPL] = sched,
2346 [CPL_PASS_OPEN_RPL] = sched,
2347 [CPL_CLOSE_LISTSRV_RPL] = sched,
2348 [CPL_PASS_ACCEPT_REQ] = sched,
2349 [CPL_PASS_ESTABLISH] = sched,
2350 [CPL_PEER_CLOSE] = sched,
2351 [CPL_CLOSE_CON_RPL] = sched,
2352 [CPL_ABORT_REQ_RSS] = sched,
2353 [CPL_RDMA_TERMINATE] = sched,
2354 [CPL_FW4_ACK] = sched,
2355 [CPL_SET_TCB_RPL] = set_tcb_rpl,
2356 [CPL_FW6_MSG] = fw6_msg
2359 int __init c4iw_cm_init(void)
2361 spin_lock_init(&timeout_lock);
2362 skb_queue_head_init(&rxq);
2364 workq = create_singlethread_workqueue("iw_cxgb4");
2371 void __exit c4iw_cm_term(void)
2373 WARN_ON(!list_empty(&timeout_list));
2374 flush_workqueue(workq);
2375 destroy_workqueue(workq);