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 static int dack_mode = 1;
65 module_param(dack_mode, int, 0644);
66 MODULE_PARM_DESC(dack_mode, "Delayed ack mode (default=1)");
68 int c4iw_max_read_depth = 8;
69 module_param(c4iw_max_read_depth, int, 0644);
70 MODULE_PARM_DESC(c4iw_max_read_depth, "Per-connection max ORD/IRD (default=8)");
72 static int enable_tcp_timestamps;
73 module_param(enable_tcp_timestamps, int, 0644);
74 MODULE_PARM_DESC(enable_tcp_timestamps, "Enable tcp timestamps (default=0)");
76 static int enable_tcp_sack;
77 module_param(enable_tcp_sack, int, 0644);
78 MODULE_PARM_DESC(enable_tcp_sack, "Enable tcp SACK (default=0)");
80 static int enable_tcp_window_scaling = 1;
81 module_param(enable_tcp_window_scaling, int, 0644);
82 MODULE_PARM_DESC(enable_tcp_window_scaling,
83 "Enable tcp window scaling (default=1)");
86 module_param(c4iw_debug, int, 0644);
87 MODULE_PARM_DESC(c4iw_debug, "Enable debug logging (default=0)");
90 module_param(peer2peer, int, 0644);
91 MODULE_PARM_DESC(peer2peer, "Support peer2peer ULPs (default=0)");
93 static int p2p_type = FW_RI_INIT_P2PTYPE_READ_REQ;
94 module_param(p2p_type, int, 0644);
95 MODULE_PARM_DESC(p2p_type, "RDMAP opcode to use for the RTR message: "
96 "1=RDMA_READ 0=RDMA_WRITE (default 1)");
98 static int ep_timeout_secs = 60;
99 module_param(ep_timeout_secs, int, 0644);
100 MODULE_PARM_DESC(ep_timeout_secs, "CM Endpoint operation timeout "
101 "in seconds (default=60)");
103 static int mpa_rev = 1;
104 module_param(mpa_rev, int, 0644);
105 MODULE_PARM_DESC(mpa_rev, "MPA Revision, 0 supports amso1100, "
106 "1 is spec compliant. (default=1)");
108 static int markers_enabled;
109 module_param(markers_enabled, int, 0644);
110 MODULE_PARM_DESC(markers_enabled, "Enable MPA MARKERS (default(0)=disabled)");
112 static int crc_enabled = 1;
113 module_param(crc_enabled, int, 0644);
114 MODULE_PARM_DESC(crc_enabled, "Enable MPA CRC (default(1)=enabled)");
116 static int rcv_win = 256 * 1024;
117 module_param(rcv_win, int, 0644);
118 MODULE_PARM_DESC(rcv_win, "TCP receive window in bytes (default=256KB)");
120 static int snd_win = 128 * 1024;
121 module_param(snd_win, int, 0644);
122 MODULE_PARM_DESC(snd_win, "TCP send window in bytes (default=128KB)");
124 static struct workqueue_struct *workq;
126 static struct sk_buff_head rxq;
128 static struct sk_buff *get_skb(struct sk_buff *skb, int len, gfp_t gfp);
129 static void ep_timeout(unsigned long arg);
130 static void connect_reply_upcall(struct c4iw_ep *ep, int status);
132 static LIST_HEAD(timeout_list);
133 static spinlock_t timeout_lock;
135 static void start_ep_timer(struct c4iw_ep *ep)
137 PDBG("%s ep %p\n", __func__, ep);
138 if (timer_pending(&ep->timer)) {
139 PDBG("%s stopped / restarted timer ep %p\n", __func__, ep);
140 del_timer_sync(&ep->timer);
142 c4iw_get_ep(&ep->com);
143 ep->timer.expires = jiffies + ep_timeout_secs * HZ;
144 ep->timer.data = (unsigned long)ep;
145 ep->timer.function = ep_timeout;
146 add_timer(&ep->timer);
149 static void stop_ep_timer(struct c4iw_ep *ep)
151 PDBG("%s ep %p\n", __func__, ep);
152 if (!timer_pending(&ep->timer)) {
153 printk(KERN_ERR "%s timer stopped when its not running! "
154 "ep %p state %u\n", __func__, ep, ep->com.state);
158 del_timer_sync(&ep->timer);
159 c4iw_put_ep(&ep->com);
162 static int c4iw_l2t_send(struct c4iw_rdev *rdev, struct sk_buff *skb,
163 struct l2t_entry *l2e)
167 if (c4iw_fatal_error(rdev)) {
169 PDBG("%s - device in error state - dropping\n", __func__);
172 error = cxgb4_l2t_send(rdev->lldi.ports[0], skb, l2e);
175 return error < 0 ? error : 0;
178 int c4iw_ofld_send(struct c4iw_rdev *rdev, struct sk_buff *skb)
182 if (c4iw_fatal_error(rdev)) {
184 PDBG("%s - device in error state - dropping\n", __func__);
187 error = cxgb4_ofld_send(rdev->lldi.ports[0], skb);
190 return error < 0 ? error : 0;
193 static void release_tid(struct c4iw_rdev *rdev, u32 hwtid, struct sk_buff *skb)
195 struct cpl_tid_release *req;
197 skb = get_skb(skb, sizeof *req, GFP_KERNEL);
200 req = (struct cpl_tid_release *) skb_put(skb, sizeof(*req));
201 INIT_TP_WR(req, hwtid);
202 OPCODE_TID(req) = cpu_to_be32(MK_OPCODE_TID(CPL_TID_RELEASE, hwtid));
203 set_wr_txq(skb, CPL_PRIORITY_SETUP, 0);
204 c4iw_ofld_send(rdev, skb);
208 static void set_emss(struct c4iw_ep *ep, u16 opt)
210 ep->emss = ep->com.dev->rdev.lldi.mtus[GET_TCPOPT_MSS(opt)] - 40;
212 if (GET_TCPOPT_TSTAMP(opt))
216 PDBG("%s mss_idx %u mss %u emss=%u\n", __func__, GET_TCPOPT_MSS(opt),
220 static enum c4iw_ep_state state_read(struct c4iw_ep_common *epc)
222 enum c4iw_ep_state state;
224 mutex_lock(&epc->mutex);
226 mutex_unlock(&epc->mutex);
230 static void __state_set(struct c4iw_ep_common *epc, enum c4iw_ep_state new)
235 static void state_set(struct c4iw_ep_common *epc, enum c4iw_ep_state new)
237 mutex_lock(&epc->mutex);
238 PDBG("%s - %s -> %s\n", __func__, states[epc->state], states[new]);
239 __state_set(epc, new);
240 mutex_unlock(&epc->mutex);
244 static void *alloc_ep(int size, gfp_t gfp)
246 struct c4iw_ep_common *epc;
248 epc = kzalloc(size, gfp);
250 kref_init(&epc->kref);
251 mutex_init(&epc->mutex);
252 c4iw_init_wr_wait(&epc->wr_wait);
254 PDBG("%s alloc ep %p\n", __func__, epc);
258 void _c4iw_free_ep(struct kref *kref)
262 ep = container_of(kref, struct c4iw_ep, com.kref);
263 PDBG("%s ep %p state %s\n", __func__, ep, states[state_read(&ep->com)]);
264 if (test_bit(RELEASE_RESOURCES, &ep->com.flags)) {
265 cxgb4_remove_tid(ep->com.dev->rdev.lldi.tids, 0, ep->hwtid);
266 dst_release(ep->dst);
267 cxgb4_l2t_release(ep->l2t);
272 static void release_ep_resources(struct c4iw_ep *ep)
274 set_bit(RELEASE_RESOURCES, &ep->com.flags);
275 c4iw_put_ep(&ep->com);
278 static int status2errno(int status)
283 case CPL_ERR_CONN_RESET:
285 case CPL_ERR_ARP_MISS:
286 return -EHOSTUNREACH;
287 case CPL_ERR_CONN_TIMEDOUT:
289 case CPL_ERR_TCAM_FULL:
291 case CPL_ERR_CONN_EXIST:
299 * Try and reuse skbs already allocated...
301 static struct sk_buff *get_skb(struct sk_buff *skb, int len, gfp_t gfp)
303 if (skb && !skb_is_nonlinear(skb) && !skb_cloned(skb)) {
306 skb_reset_transport_header(skb);
308 skb = alloc_skb(len, gfp);
313 static struct rtable *find_route(struct c4iw_dev *dev, __be32 local_ip,
314 __be32 peer_ip, __be16 local_port,
315 __be16 peer_port, u8 tos)
319 rt = ip_route_output_ports(&init_net, NULL, peer_ip, local_ip,
320 peer_port, local_port, IPPROTO_TCP,
327 static void arp_failure_discard(void *handle, struct sk_buff *skb)
329 PDBG("%s c4iw_dev %p\n", __func__, handle);
334 * Handle an ARP failure for an active open.
336 static void act_open_req_arp_failure(void *handle, struct sk_buff *skb)
338 printk(KERN_ERR MOD "ARP failure duing connect\n");
343 * Handle an ARP failure for a CPL_ABORT_REQ. Change it into a no RST variant
346 static void abort_arp_failure(void *handle, struct sk_buff *skb)
348 struct c4iw_rdev *rdev = handle;
349 struct cpl_abort_req *req = cplhdr(skb);
351 PDBG("%s rdev %p\n", __func__, rdev);
352 req->cmd = CPL_ABORT_NO_RST;
353 c4iw_ofld_send(rdev, skb);
356 static void send_flowc(struct c4iw_ep *ep, struct sk_buff *skb)
358 unsigned int flowclen = 80;
359 struct fw_flowc_wr *flowc;
362 skb = get_skb(skb, flowclen, GFP_KERNEL);
363 flowc = (struct fw_flowc_wr *)__skb_put(skb, flowclen);
365 flowc->op_to_nparams = cpu_to_be32(FW_WR_OP(FW_FLOWC_WR) |
366 FW_FLOWC_WR_NPARAMS(8));
367 flowc->flowid_len16 = cpu_to_be32(FW_WR_LEN16(DIV_ROUND_UP(flowclen,
368 16)) | FW_WR_FLOWID(ep->hwtid));
370 flowc->mnemval[0].mnemonic = FW_FLOWC_MNEM_PFNVFN;
371 flowc->mnemval[0].val = cpu_to_be32(PCI_FUNC(ep->com.dev->rdev.lldi.pdev->devfn) << 8);
372 flowc->mnemval[1].mnemonic = FW_FLOWC_MNEM_CH;
373 flowc->mnemval[1].val = cpu_to_be32(ep->tx_chan);
374 flowc->mnemval[2].mnemonic = FW_FLOWC_MNEM_PORT;
375 flowc->mnemval[2].val = cpu_to_be32(ep->tx_chan);
376 flowc->mnemval[3].mnemonic = FW_FLOWC_MNEM_IQID;
377 flowc->mnemval[3].val = cpu_to_be32(ep->rss_qid);
378 flowc->mnemval[4].mnemonic = FW_FLOWC_MNEM_SNDNXT;
379 flowc->mnemval[4].val = cpu_to_be32(ep->snd_seq);
380 flowc->mnemval[5].mnemonic = FW_FLOWC_MNEM_RCVNXT;
381 flowc->mnemval[5].val = cpu_to_be32(ep->rcv_seq);
382 flowc->mnemval[6].mnemonic = FW_FLOWC_MNEM_SNDBUF;
383 flowc->mnemval[6].val = cpu_to_be32(snd_win);
384 flowc->mnemval[7].mnemonic = FW_FLOWC_MNEM_MSS;
385 flowc->mnemval[7].val = cpu_to_be32(ep->emss);
386 /* Pad WR to 16 byte boundary */
387 flowc->mnemval[8].mnemonic = 0;
388 flowc->mnemval[8].val = 0;
389 for (i = 0; i < 9; i++) {
390 flowc->mnemval[i].r4[0] = 0;
391 flowc->mnemval[i].r4[1] = 0;
392 flowc->mnemval[i].r4[2] = 0;
395 set_wr_txq(skb, CPL_PRIORITY_DATA, ep->txq_idx);
396 c4iw_ofld_send(&ep->com.dev->rdev, skb);
399 static int send_halfclose(struct c4iw_ep *ep, gfp_t gfp)
401 struct cpl_close_con_req *req;
403 int wrlen = roundup(sizeof *req, 16);
405 PDBG("%s ep %p tid %u\n", __func__, ep, ep->hwtid);
406 skb = get_skb(NULL, wrlen, gfp);
408 printk(KERN_ERR MOD "%s - failed to alloc skb\n", __func__);
411 set_wr_txq(skb, CPL_PRIORITY_DATA, ep->txq_idx);
412 t4_set_arp_err_handler(skb, NULL, arp_failure_discard);
413 req = (struct cpl_close_con_req *) skb_put(skb, wrlen);
414 memset(req, 0, wrlen);
415 INIT_TP_WR(req, ep->hwtid);
416 OPCODE_TID(req) = cpu_to_be32(MK_OPCODE_TID(CPL_CLOSE_CON_REQ,
418 return c4iw_l2t_send(&ep->com.dev->rdev, skb, ep->l2t);
421 static int send_abort(struct c4iw_ep *ep, struct sk_buff *skb, gfp_t gfp)
423 struct cpl_abort_req *req;
424 int wrlen = roundup(sizeof *req, 16);
426 PDBG("%s ep %p tid %u\n", __func__, ep, ep->hwtid);
427 skb = get_skb(skb, wrlen, gfp);
429 printk(KERN_ERR MOD "%s - failed to alloc skb.\n",
433 set_wr_txq(skb, CPL_PRIORITY_DATA, ep->txq_idx);
434 t4_set_arp_err_handler(skb, &ep->com.dev->rdev, abort_arp_failure);
435 req = (struct cpl_abort_req *) skb_put(skb, wrlen);
436 memset(req, 0, wrlen);
437 INIT_TP_WR(req, ep->hwtid);
438 OPCODE_TID(req) = cpu_to_be32(MK_OPCODE_TID(CPL_ABORT_REQ, ep->hwtid));
439 req->cmd = CPL_ABORT_SEND_RST;
440 return c4iw_l2t_send(&ep->com.dev->rdev, skb, ep->l2t);
443 static int send_connect(struct c4iw_ep *ep)
445 struct cpl_act_open_req *req;
449 unsigned int mtu_idx;
451 int wrlen = roundup(sizeof *req, 16);
453 PDBG("%s ep %p atid %u\n", __func__, ep, ep->atid);
455 skb = get_skb(NULL, wrlen, GFP_KERNEL);
457 printk(KERN_ERR MOD "%s - failed to alloc skb.\n",
461 set_wr_txq(skb, CPL_PRIORITY_SETUP, ep->ctrlq_idx);
463 cxgb4_best_mtu(ep->com.dev->rdev.lldi.mtus, ep->mtu, &mtu_idx);
464 wscale = compute_wscale(rcv_win);
465 opt0 = KEEP_ALIVE(1) |
469 L2T_IDX(ep->l2t->idx) |
470 TX_CHAN(ep->tx_chan) |
471 SMAC_SEL(ep->smac_idx) |
473 ULP_MODE(ULP_MODE_TCPDDP) |
474 RCV_BUFSIZ(rcv_win>>10);
475 opt2 = RX_CHANNEL(0) |
476 RSS_QUEUE_VALID | RSS_QUEUE(ep->rss_qid);
477 if (enable_tcp_timestamps)
478 opt2 |= TSTAMPS_EN(1);
481 if (wscale && enable_tcp_window_scaling)
482 opt2 |= WND_SCALE_EN(1);
483 t4_set_arp_err_handler(skb, NULL, act_open_req_arp_failure);
485 req = (struct cpl_act_open_req *) skb_put(skb, wrlen);
487 OPCODE_TID(req) = cpu_to_be32(
488 MK_OPCODE_TID(CPL_ACT_OPEN_REQ, ((ep->rss_qid<<14)|ep->atid)));
489 req->local_port = ep->com.local_addr.sin_port;
490 req->peer_port = ep->com.remote_addr.sin_port;
491 req->local_ip = ep->com.local_addr.sin_addr.s_addr;
492 req->peer_ip = ep->com.remote_addr.sin_addr.s_addr;
493 req->opt0 = cpu_to_be64(opt0);
495 req->opt2 = cpu_to_be32(opt2);
496 return c4iw_l2t_send(&ep->com.dev->rdev, skb, ep->l2t);
499 static void send_mpa_req(struct c4iw_ep *ep, struct sk_buff *skb)
502 struct fw_ofld_tx_data_wr *req;
503 struct mpa_message *mpa;
505 PDBG("%s ep %p tid %u pd_len %d\n", __func__, ep, ep->hwtid, ep->plen);
507 BUG_ON(skb_cloned(skb));
509 mpalen = sizeof(*mpa) + ep->plen;
510 wrlen = roundup(mpalen + sizeof *req, 16);
511 skb = get_skb(skb, wrlen, GFP_KERNEL);
513 connect_reply_upcall(ep, -ENOMEM);
516 set_wr_txq(skb, CPL_PRIORITY_DATA, ep->txq_idx);
518 req = (struct fw_ofld_tx_data_wr *)skb_put(skb, wrlen);
519 memset(req, 0, wrlen);
520 req->op_to_immdlen = cpu_to_be32(
521 FW_WR_OP(FW_OFLD_TX_DATA_WR) |
523 FW_WR_IMMDLEN(mpalen));
524 req->flowid_len16 = cpu_to_be32(
525 FW_WR_FLOWID(ep->hwtid) |
526 FW_WR_LEN16(wrlen >> 4));
527 req->plen = cpu_to_be32(mpalen);
528 req->tunnel_to_proxy = cpu_to_be32(
529 FW_OFLD_TX_DATA_WR_FLUSH(1) |
530 FW_OFLD_TX_DATA_WR_SHOVE(1));
532 mpa = (struct mpa_message *)(req + 1);
533 memcpy(mpa->key, MPA_KEY_REQ, sizeof(mpa->key));
534 mpa->flags = (crc_enabled ? MPA_CRC : 0) |
535 (markers_enabled ? MPA_MARKERS : 0);
536 mpa->private_data_size = htons(ep->plen);
537 mpa->revision = mpa_rev;
540 memcpy(mpa->private_data, ep->mpa_pkt + sizeof(*mpa), ep->plen);
543 * Reference the mpa skb. This ensures the data area
544 * will remain in memory until the hw acks the tx.
545 * Function fw4_ack() will deref it.
548 t4_set_arp_err_handler(skb, NULL, arp_failure_discard);
551 c4iw_l2t_send(&ep->com.dev->rdev, skb, ep->l2t);
553 state_set(&ep->com, MPA_REQ_SENT);
554 ep->mpa_attr.initiator = 1;
558 static int send_mpa_reject(struct c4iw_ep *ep, const void *pdata, u8 plen)
561 struct fw_ofld_tx_data_wr *req;
562 struct mpa_message *mpa;
565 PDBG("%s ep %p tid %u pd_len %d\n", __func__, ep, ep->hwtid, ep->plen);
567 mpalen = sizeof(*mpa) + plen;
568 wrlen = roundup(mpalen + sizeof *req, 16);
570 skb = get_skb(NULL, wrlen, GFP_KERNEL);
572 printk(KERN_ERR MOD "%s - cannot alloc skb!\n", __func__);
575 set_wr_txq(skb, CPL_PRIORITY_DATA, ep->txq_idx);
577 req = (struct fw_ofld_tx_data_wr *)skb_put(skb, wrlen);
578 memset(req, 0, wrlen);
579 req->op_to_immdlen = cpu_to_be32(
580 FW_WR_OP(FW_OFLD_TX_DATA_WR) |
582 FW_WR_IMMDLEN(mpalen));
583 req->flowid_len16 = cpu_to_be32(
584 FW_WR_FLOWID(ep->hwtid) |
585 FW_WR_LEN16(wrlen >> 4));
586 req->plen = cpu_to_be32(mpalen);
587 req->tunnel_to_proxy = cpu_to_be32(
588 FW_OFLD_TX_DATA_WR_FLUSH(1) |
589 FW_OFLD_TX_DATA_WR_SHOVE(1));
591 mpa = (struct mpa_message *)(req + 1);
592 memset(mpa, 0, sizeof(*mpa));
593 memcpy(mpa->key, MPA_KEY_REP, sizeof(mpa->key));
594 mpa->flags = MPA_REJECT;
595 mpa->revision = mpa_rev;
596 mpa->private_data_size = htons(plen);
598 memcpy(mpa->private_data, pdata, plen);
601 * Reference the mpa skb again. This ensures the data area
602 * will remain in memory until the hw acks the tx.
603 * Function fw4_ack() will deref it.
606 set_wr_txq(skb, CPL_PRIORITY_DATA, ep->txq_idx);
607 t4_set_arp_err_handler(skb, NULL, arp_failure_discard);
610 return c4iw_l2t_send(&ep->com.dev->rdev, skb, ep->l2t);
613 static int send_mpa_reply(struct c4iw_ep *ep, const void *pdata, u8 plen)
616 struct fw_ofld_tx_data_wr *req;
617 struct mpa_message *mpa;
620 PDBG("%s ep %p tid %u pd_len %d\n", __func__, ep, ep->hwtid, ep->plen);
622 mpalen = sizeof(*mpa) + plen;
623 wrlen = roundup(mpalen + sizeof *req, 16);
625 skb = get_skb(NULL, wrlen, GFP_KERNEL);
627 printk(KERN_ERR MOD "%s - cannot alloc skb!\n", __func__);
630 set_wr_txq(skb, CPL_PRIORITY_DATA, ep->txq_idx);
632 req = (struct fw_ofld_tx_data_wr *) skb_put(skb, wrlen);
633 memset(req, 0, wrlen);
634 req->op_to_immdlen = cpu_to_be32(
635 FW_WR_OP(FW_OFLD_TX_DATA_WR) |
637 FW_WR_IMMDLEN(mpalen));
638 req->flowid_len16 = cpu_to_be32(
639 FW_WR_FLOWID(ep->hwtid) |
640 FW_WR_LEN16(wrlen >> 4));
641 req->plen = cpu_to_be32(mpalen);
642 req->tunnel_to_proxy = cpu_to_be32(
643 FW_OFLD_TX_DATA_WR_FLUSH(1) |
644 FW_OFLD_TX_DATA_WR_SHOVE(1));
646 mpa = (struct mpa_message *)(req + 1);
647 memset(mpa, 0, sizeof(*mpa));
648 memcpy(mpa->key, MPA_KEY_REP, sizeof(mpa->key));
649 mpa->flags = (ep->mpa_attr.crc_enabled ? MPA_CRC : 0) |
650 (markers_enabled ? MPA_MARKERS : 0);
651 mpa->revision = mpa_rev;
652 mpa->private_data_size = htons(plen);
654 memcpy(mpa->private_data, pdata, plen);
657 * Reference the mpa skb. This ensures the data area
658 * will remain in memory until the hw acks the tx.
659 * Function fw4_ack() will deref it.
662 t4_set_arp_err_handler(skb, NULL, arp_failure_discard);
664 state_set(&ep->com, MPA_REP_SENT);
665 return c4iw_l2t_send(&ep->com.dev->rdev, skb, ep->l2t);
668 static int act_establish(struct c4iw_dev *dev, struct sk_buff *skb)
671 struct cpl_act_establish *req = cplhdr(skb);
672 unsigned int tid = GET_TID(req);
673 unsigned int atid = GET_TID_TID(ntohl(req->tos_atid));
674 struct tid_info *t = dev->rdev.lldi.tids;
676 ep = lookup_atid(t, atid);
678 PDBG("%s ep %p tid %u snd_isn %u rcv_isn %u\n", __func__, ep, tid,
679 be32_to_cpu(req->snd_isn), be32_to_cpu(req->rcv_isn));
681 dst_confirm(ep->dst);
683 /* setup the hwtid for this connection */
685 cxgb4_insert_tid(t, ep, tid);
687 ep->snd_seq = be32_to_cpu(req->snd_isn);
688 ep->rcv_seq = be32_to_cpu(req->rcv_isn);
690 set_emss(ep, ntohs(req->tcp_opt));
692 /* dealloc the atid */
693 cxgb4_free_atid(t, atid);
695 /* start MPA negotiation */
696 send_flowc(ep, NULL);
697 send_mpa_req(ep, skb);
702 static void close_complete_upcall(struct c4iw_ep *ep)
704 struct iw_cm_event event;
706 PDBG("%s ep %p tid %u\n", __func__, ep, ep->hwtid);
707 memset(&event, 0, sizeof(event));
708 event.event = IW_CM_EVENT_CLOSE;
710 PDBG("close complete delivered ep %p cm_id %p tid %u\n",
711 ep, ep->com.cm_id, ep->hwtid);
712 ep->com.cm_id->event_handler(ep->com.cm_id, &event);
713 ep->com.cm_id->rem_ref(ep->com.cm_id);
714 ep->com.cm_id = NULL;
719 static int abort_connection(struct c4iw_ep *ep, struct sk_buff *skb, gfp_t gfp)
721 PDBG("%s ep %p tid %u\n", __func__, ep, ep->hwtid);
722 close_complete_upcall(ep);
723 state_set(&ep->com, ABORTING);
724 return send_abort(ep, skb, gfp);
727 static void peer_close_upcall(struct c4iw_ep *ep)
729 struct iw_cm_event event;
731 PDBG("%s ep %p tid %u\n", __func__, ep, ep->hwtid);
732 memset(&event, 0, sizeof(event));
733 event.event = IW_CM_EVENT_DISCONNECT;
735 PDBG("peer close delivered ep %p cm_id %p tid %u\n",
736 ep, ep->com.cm_id, ep->hwtid);
737 ep->com.cm_id->event_handler(ep->com.cm_id, &event);
741 static void peer_abort_upcall(struct c4iw_ep *ep)
743 struct iw_cm_event event;
745 PDBG("%s ep %p tid %u\n", __func__, ep, ep->hwtid);
746 memset(&event, 0, sizeof(event));
747 event.event = IW_CM_EVENT_CLOSE;
748 event.status = -ECONNRESET;
750 PDBG("abort delivered ep %p cm_id %p tid %u\n", ep,
751 ep->com.cm_id, ep->hwtid);
752 ep->com.cm_id->event_handler(ep->com.cm_id, &event);
753 ep->com.cm_id->rem_ref(ep->com.cm_id);
754 ep->com.cm_id = NULL;
759 static void connect_reply_upcall(struct c4iw_ep *ep, int status)
761 struct iw_cm_event event;
763 PDBG("%s ep %p tid %u status %d\n", __func__, ep, ep->hwtid, status);
764 memset(&event, 0, sizeof(event));
765 event.event = IW_CM_EVENT_CONNECT_REPLY;
766 event.status = status;
767 event.local_addr = ep->com.local_addr;
768 event.remote_addr = ep->com.remote_addr;
770 if ((status == 0) || (status == -ECONNREFUSED)) {
771 event.private_data_len = ep->plen;
772 event.private_data = ep->mpa_pkt + sizeof(struct mpa_message);
775 PDBG("%s ep %p tid %u status %d\n", __func__, ep,
777 ep->com.cm_id->event_handler(ep->com.cm_id, &event);
780 ep->com.cm_id->rem_ref(ep->com.cm_id);
781 ep->com.cm_id = NULL;
786 static void connect_request_upcall(struct c4iw_ep *ep)
788 struct iw_cm_event event;
790 PDBG("%s ep %p tid %u\n", __func__, ep, ep->hwtid);
791 memset(&event, 0, sizeof(event));
792 event.event = IW_CM_EVENT_CONNECT_REQUEST;
793 event.local_addr = ep->com.local_addr;
794 event.remote_addr = ep->com.remote_addr;
795 event.private_data_len = ep->plen;
796 event.private_data = ep->mpa_pkt + sizeof(struct mpa_message);
797 event.provider_data = ep;
798 if (state_read(&ep->parent_ep->com) != DEAD) {
799 c4iw_get_ep(&ep->com);
800 ep->parent_ep->com.cm_id->event_handler(
801 ep->parent_ep->com.cm_id,
804 c4iw_put_ep(&ep->parent_ep->com);
805 ep->parent_ep = NULL;
808 static void established_upcall(struct c4iw_ep *ep)
810 struct iw_cm_event event;
812 PDBG("%s ep %p tid %u\n", __func__, ep, ep->hwtid);
813 memset(&event, 0, sizeof(event));
814 event.event = IW_CM_EVENT_ESTABLISHED;
816 PDBG("%s ep %p tid %u\n", __func__, ep, ep->hwtid);
817 ep->com.cm_id->event_handler(ep->com.cm_id, &event);
821 static int update_rx_credits(struct c4iw_ep *ep, u32 credits)
823 struct cpl_rx_data_ack *req;
825 int wrlen = roundup(sizeof *req, 16);
827 PDBG("%s ep %p tid %u credits %u\n", __func__, ep, ep->hwtid, credits);
828 skb = get_skb(NULL, wrlen, GFP_KERNEL);
830 printk(KERN_ERR MOD "update_rx_credits - cannot alloc skb!\n");
834 req = (struct cpl_rx_data_ack *) skb_put(skb, wrlen);
835 memset(req, 0, wrlen);
836 INIT_TP_WR(req, ep->hwtid);
837 OPCODE_TID(req) = cpu_to_be32(MK_OPCODE_TID(CPL_RX_DATA_ACK,
839 req->credit_dack = cpu_to_be32(credits | RX_FORCE_ACK(1) |
841 V_RX_DACK_MODE(dack_mode));
842 set_wr_txq(skb, CPL_PRIORITY_ACK, ep->ctrlq_idx);
843 c4iw_ofld_send(&ep->com.dev->rdev, skb);
847 static void process_mpa_reply(struct c4iw_ep *ep, struct sk_buff *skb)
849 struct mpa_message *mpa;
851 struct c4iw_qp_attributes attrs;
852 enum c4iw_qp_attr_mask mask;
855 PDBG("%s ep %p tid %u\n", __func__, ep, ep->hwtid);
858 * Stop mpa timer. If it expired, then the state has
859 * changed and we bail since ep_timeout already aborted
863 if (state_read(&ep->com) != MPA_REQ_SENT)
867 * If we get more than the supported amount of private data
868 * then we must fail this connection.
870 if (ep->mpa_pkt_len + skb->len > sizeof(ep->mpa_pkt)) {
876 * copy the new data into our accumulation buffer.
878 skb_copy_from_linear_data(skb, &(ep->mpa_pkt[ep->mpa_pkt_len]),
880 ep->mpa_pkt_len += skb->len;
883 * if we don't even have the mpa message, then bail.
885 if (ep->mpa_pkt_len < sizeof(*mpa))
887 mpa = (struct mpa_message *) ep->mpa_pkt;
889 /* Validate MPA header. */
890 if (mpa->revision != mpa_rev) {
894 if (memcmp(mpa->key, MPA_KEY_REP, sizeof(mpa->key))) {
899 plen = ntohs(mpa->private_data_size);
902 * Fail if there's too much private data.
904 if (plen > MPA_MAX_PRIVATE_DATA) {
910 * If plen does not account for pkt size
912 if (ep->mpa_pkt_len > (sizeof(*mpa) + plen)) {
917 ep->plen = (u8) plen;
920 * If we don't have all the pdata yet, then bail.
921 * We'll continue process when more data arrives.
923 if (ep->mpa_pkt_len < (sizeof(*mpa) + plen))
926 if (mpa->flags & MPA_REJECT) {
932 * If we get here we have accumulated the entire mpa
933 * start reply message including private data. And
934 * the MPA header is valid.
936 state_set(&ep->com, FPDU_MODE);
937 ep->mpa_attr.crc_enabled = (mpa->flags & MPA_CRC) | crc_enabled ? 1 : 0;
938 ep->mpa_attr.recv_marker_enabled = markers_enabled;
939 ep->mpa_attr.xmit_marker_enabled = mpa->flags & MPA_MARKERS ? 1 : 0;
940 ep->mpa_attr.version = mpa_rev;
941 ep->mpa_attr.p2p_type = peer2peer ? p2p_type :
942 FW_RI_INIT_P2PTYPE_DISABLED;
943 PDBG("%s - crc_enabled=%d, recv_marker_enabled=%d, "
944 "xmit_marker_enabled=%d, version=%d\n", __func__,
945 ep->mpa_attr.crc_enabled, ep->mpa_attr.recv_marker_enabled,
946 ep->mpa_attr.xmit_marker_enabled, ep->mpa_attr.version);
948 attrs.mpa_attr = ep->mpa_attr;
949 attrs.max_ird = ep->ird;
950 attrs.max_ord = ep->ord;
951 attrs.llp_stream_handle = ep;
952 attrs.next_state = C4IW_QP_STATE_RTS;
954 mask = C4IW_QP_ATTR_NEXT_STATE |
955 C4IW_QP_ATTR_LLP_STREAM_HANDLE | C4IW_QP_ATTR_MPA_ATTR |
956 C4IW_QP_ATTR_MAX_IRD | C4IW_QP_ATTR_MAX_ORD;
958 /* bind QP and TID with INIT_WR */
959 err = c4iw_modify_qp(ep->com.qp->rhp,
960 ep->com.qp, mask, &attrs, 1);
965 state_set(&ep->com, ABORTING);
966 send_abort(ep, skb, GFP_KERNEL);
968 connect_reply_upcall(ep, err);
972 static void process_mpa_request(struct c4iw_ep *ep, struct sk_buff *skb)
974 struct mpa_message *mpa;
977 PDBG("%s ep %p tid %u\n", __func__, ep, ep->hwtid);
979 if (state_read(&ep->com) != MPA_REQ_WAIT)
983 * If we get more than the supported amount of private data
984 * then we must fail this connection.
986 if (ep->mpa_pkt_len + skb->len > sizeof(ep->mpa_pkt)) {
988 abort_connection(ep, skb, GFP_KERNEL);
992 PDBG("%s enter (%s line %u)\n", __func__, __FILE__, __LINE__);
995 * Copy the new data into our accumulation buffer.
997 skb_copy_from_linear_data(skb, &(ep->mpa_pkt[ep->mpa_pkt_len]),
999 ep->mpa_pkt_len += skb->len;
1002 * If we don't even have the mpa message, then bail.
1003 * We'll continue process when more data arrives.
1005 if (ep->mpa_pkt_len < sizeof(*mpa))
1008 PDBG("%s enter (%s line %u)\n", __func__, __FILE__, __LINE__);
1010 mpa = (struct mpa_message *) ep->mpa_pkt;
1013 * Validate MPA Header.
1015 if (mpa->revision != mpa_rev) {
1016 abort_connection(ep, skb, GFP_KERNEL);
1020 if (memcmp(mpa->key, MPA_KEY_REQ, sizeof(mpa->key))) {
1021 abort_connection(ep, skb, GFP_KERNEL);
1025 plen = ntohs(mpa->private_data_size);
1028 * Fail if there's too much private data.
1030 if (plen > MPA_MAX_PRIVATE_DATA) {
1031 abort_connection(ep, skb, GFP_KERNEL);
1036 * If plen does not account for pkt size
1038 if (ep->mpa_pkt_len > (sizeof(*mpa) + plen)) {
1039 abort_connection(ep, skb, GFP_KERNEL);
1042 ep->plen = (u8) plen;
1045 * If we don't have all the pdata yet, then bail.
1047 if (ep->mpa_pkt_len < (sizeof(*mpa) + plen))
1051 * If we get here we have accumulated the entire mpa
1052 * start reply message including private data.
1054 ep->mpa_attr.initiator = 0;
1055 ep->mpa_attr.crc_enabled = (mpa->flags & MPA_CRC) | crc_enabled ? 1 : 0;
1056 ep->mpa_attr.recv_marker_enabled = markers_enabled;
1057 ep->mpa_attr.xmit_marker_enabled = mpa->flags & MPA_MARKERS ? 1 : 0;
1058 ep->mpa_attr.version = mpa_rev;
1059 ep->mpa_attr.p2p_type = peer2peer ? p2p_type :
1060 FW_RI_INIT_P2PTYPE_DISABLED;
1061 PDBG("%s - crc_enabled=%d, recv_marker_enabled=%d, "
1062 "xmit_marker_enabled=%d, version=%d p2p_type=%d\n", __func__,
1063 ep->mpa_attr.crc_enabled, ep->mpa_attr.recv_marker_enabled,
1064 ep->mpa_attr.xmit_marker_enabled, ep->mpa_attr.version,
1065 ep->mpa_attr.p2p_type);
1067 state_set(&ep->com, MPA_REQ_RCVD);
1070 connect_request_upcall(ep);
1074 static int rx_data(struct c4iw_dev *dev, struct sk_buff *skb)
1077 struct cpl_rx_data *hdr = cplhdr(skb);
1078 unsigned int dlen = ntohs(hdr->len);
1079 unsigned int tid = GET_TID(hdr);
1080 struct tid_info *t = dev->rdev.lldi.tids;
1082 ep = lookup_tid(t, tid);
1083 PDBG("%s ep %p tid %u dlen %u\n", __func__, ep, ep->hwtid, dlen);
1084 skb_pull(skb, sizeof(*hdr));
1085 skb_trim(skb, dlen);
1087 ep->rcv_seq += dlen;
1088 BUG_ON(ep->rcv_seq != (ntohl(hdr->seq) + dlen));
1090 /* update RX credits */
1091 update_rx_credits(ep, dlen);
1093 switch (state_read(&ep->com)) {
1095 process_mpa_reply(ep, skb);
1098 process_mpa_request(ep, skb);
1103 printk(KERN_ERR MOD "%s Unexpected streaming data."
1104 " ep %p state %d tid %u\n",
1105 __func__, ep, state_read(&ep->com), ep->hwtid);
1108 * The ep will timeout and inform the ULP of the failure.
1116 static int abort_rpl(struct c4iw_dev *dev, struct sk_buff *skb)
1119 struct cpl_abort_rpl_rss *rpl = cplhdr(skb);
1121 unsigned int tid = GET_TID(rpl);
1122 struct tid_info *t = dev->rdev.lldi.tids;
1124 ep = lookup_tid(t, tid);
1125 PDBG("%s ep %p tid %u\n", __func__, ep, ep->hwtid);
1127 mutex_lock(&ep->com.mutex);
1128 switch (ep->com.state) {
1130 __state_set(&ep->com, DEAD);
1134 printk(KERN_ERR "%s ep %p state %d\n",
1135 __func__, ep, ep->com.state);
1138 mutex_unlock(&ep->com.mutex);
1141 release_ep_resources(ep);
1146 * Return whether a failed active open has allocated a TID
1148 static inline int act_open_has_tid(int status)
1150 return status != CPL_ERR_TCAM_FULL && status != CPL_ERR_CONN_EXIST &&
1151 status != CPL_ERR_ARP_MISS;
1154 static int act_open_rpl(struct c4iw_dev *dev, struct sk_buff *skb)
1157 struct cpl_act_open_rpl *rpl = cplhdr(skb);
1158 unsigned int atid = GET_TID_TID(GET_AOPEN_ATID(
1159 ntohl(rpl->atid_status)));
1160 struct tid_info *t = dev->rdev.lldi.tids;
1161 int status = GET_AOPEN_STATUS(ntohl(rpl->atid_status));
1163 ep = lookup_atid(t, atid);
1165 PDBG("%s ep %p atid %u status %u errno %d\n", __func__, ep, atid,
1166 status, status2errno(status));
1168 if (status == CPL_ERR_RTX_NEG_ADVICE) {
1169 printk(KERN_WARNING MOD "Connection problems for atid %u\n",
1174 connect_reply_upcall(ep, status2errno(status));
1175 state_set(&ep->com, DEAD);
1177 if (status && act_open_has_tid(status))
1178 cxgb4_remove_tid(ep->com.dev->rdev.lldi.tids, 0, GET_TID(rpl));
1180 cxgb4_free_atid(t, atid);
1181 dst_release(ep->dst);
1182 cxgb4_l2t_release(ep->l2t);
1183 c4iw_put_ep(&ep->com);
1188 static int pass_open_rpl(struct c4iw_dev *dev, struct sk_buff *skb)
1190 struct cpl_pass_open_rpl *rpl = cplhdr(skb);
1191 struct tid_info *t = dev->rdev.lldi.tids;
1192 unsigned int stid = GET_TID(rpl);
1193 struct c4iw_listen_ep *ep = lookup_stid(t, stid);
1196 printk(KERN_ERR MOD "stid %d lookup failure!\n", stid);
1199 PDBG("%s ep %p status %d error %d\n", __func__, ep,
1200 rpl->status, status2errno(rpl->status));
1201 ep->com.wr_wait.ret = status2errno(rpl->status);
1202 ep->com.wr_wait.done = 1;
1203 wake_up(&ep->com.wr_wait.wait);
1208 static int listen_stop(struct c4iw_listen_ep *ep)
1210 struct sk_buff *skb;
1211 struct cpl_close_listsvr_req *req;
1213 PDBG("%s ep %p\n", __func__, ep);
1214 skb = get_skb(NULL, sizeof(*req), GFP_KERNEL);
1216 printk(KERN_ERR MOD "%s - failed to alloc skb\n", __func__);
1219 req = (struct cpl_close_listsvr_req *) skb_put(skb, sizeof(*req));
1221 OPCODE_TID(req) = cpu_to_be32(MK_OPCODE_TID(CPL_CLOSE_LISTSRV_REQ,
1223 req->reply_ctrl = cpu_to_be16(
1224 QUEUENO(ep->com.dev->rdev.lldi.rxq_ids[0]));
1225 set_wr_txq(skb, CPL_PRIORITY_SETUP, 0);
1226 return c4iw_ofld_send(&ep->com.dev->rdev, skb);
1229 static int close_listsrv_rpl(struct c4iw_dev *dev, struct sk_buff *skb)
1231 struct cpl_close_listsvr_rpl *rpl = cplhdr(skb);
1232 struct tid_info *t = dev->rdev.lldi.tids;
1233 unsigned int stid = GET_TID(rpl);
1234 struct c4iw_listen_ep *ep = lookup_stid(t, stid);
1236 PDBG("%s ep %p\n", __func__, ep);
1237 ep->com.wr_wait.ret = status2errno(rpl->status);
1238 ep->com.wr_wait.done = 1;
1239 wake_up(&ep->com.wr_wait.wait);
1243 static void accept_cr(struct c4iw_ep *ep, __be32 peer_ip, struct sk_buff *skb,
1244 struct cpl_pass_accept_req *req)
1246 struct cpl_pass_accept_rpl *rpl;
1247 unsigned int mtu_idx;
1252 PDBG("%s ep %p tid %u\n", __func__, ep, ep->hwtid);
1253 BUG_ON(skb_cloned(skb));
1254 skb_trim(skb, sizeof(*rpl));
1256 cxgb4_best_mtu(ep->com.dev->rdev.lldi.mtus, ep->mtu, &mtu_idx);
1257 wscale = compute_wscale(rcv_win);
1258 opt0 = KEEP_ALIVE(1) |
1262 L2T_IDX(ep->l2t->idx) |
1263 TX_CHAN(ep->tx_chan) |
1264 SMAC_SEL(ep->smac_idx) |
1266 ULP_MODE(ULP_MODE_TCPDDP) |
1267 RCV_BUFSIZ(rcv_win>>10);
1268 opt2 = RX_CHANNEL(0) |
1269 RSS_QUEUE_VALID | RSS_QUEUE(ep->rss_qid);
1271 if (enable_tcp_timestamps && req->tcpopt.tstamp)
1272 opt2 |= TSTAMPS_EN(1);
1273 if (enable_tcp_sack && req->tcpopt.sack)
1275 if (wscale && enable_tcp_window_scaling)
1276 opt2 |= WND_SCALE_EN(1);
1279 INIT_TP_WR(rpl, ep->hwtid);
1280 OPCODE_TID(rpl) = cpu_to_be32(MK_OPCODE_TID(CPL_PASS_ACCEPT_RPL,
1282 rpl->opt0 = cpu_to_be64(opt0);
1283 rpl->opt2 = cpu_to_be32(opt2);
1284 set_wr_txq(skb, CPL_PRIORITY_SETUP, ep->ctrlq_idx);
1285 c4iw_l2t_send(&ep->com.dev->rdev, skb, ep->l2t);
1290 static void reject_cr(struct c4iw_dev *dev, u32 hwtid, __be32 peer_ip,
1291 struct sk_buff *skb)
1293 PDBG("%s c4iw_dev %p tid %u peer_ip %x\n", __func__, dev, hwtid,
1295 BUG_ON(skb_cloned(skb));
1296 skb_trim(skb, sizeof(struct cpl_tid_release));
1298 release_tid(&dev->rdev, hwtid, skb);
1302 static void get_4tuple(struct cpl_pass_accept_req *req,
1303 __be32 *local_ip, __be32 *peer_ip,
1304 __be16 *local_port, __be16 *peer_port)
1306 int eth_len = G_ETH_HDR_LEN(be32_to_cpu(req->hdr_len));
1307 int ip_len = G_IP_HDR_LEN(be32_to_cpu(req->hdr_len));
1308 struct iphdr *ip = (struct iphdr *)((u8 *)(req + 1) + eth_len);
1309 struct tcphdr *tcp = (struct tcphdr *)
1310 ((u8 *)(req + 1) + eth_len + ip_len);
1312 PDBG("%s saddr 0x%x daddr 0x%x sport %u dport %u\n", __func__,
1313 ntohl(ip->saddr), ntohl(ip->daddr), ntohs(tcp->source),
1316 *peer_ip = ip->saddr;
1317 *local_ip = ip->daddr;
1318 *peer_port = tcp->source;
1319 *local_port = tcp->dest;
1324 static int pass_accept_req(struct c4iw_dev *dev, struct sk_buff *skb)
1326 struct c4iw_ep *child_ep, *parent_ep;
1327 struct cpl_pass_accept_req *req = cplhdr(skb);
1328 unsigned int stid = GET_POPEN_TID(ntohl(req->tos_stid));
1329 struct tid_info *t = dev->rdev.lldi.tids;
1330 unsigned int hwtid = GET_TID(req);
1331 struct dst_entry *dst;
1332 struct l2t_entry *l2t;
1334 __be32 local_ip, peer_ip;
1335 __be16 local_port, peer_port;
1336 struct net_device *pdev;
1337 u32 tx_chan, smac_idx;
1341 int txq_idx, ctrlq_idx;
1343 parent_ep = lookup_stid(t, stid);
1344 PDBG("%s parent ep %p tid %u\n", __func__, parent_ep, hwtid);
1346 get_4tuple(req, &local_ip, &peer_ip, &local_port, &peer_port);
1348 if (state_read(&parent_ep->com) != LISTEN) {
1349 printk(KERN_ERR "%s - listening ep not in LISTEN\n",
1354 /* Find output route */
1355 rt = find_route(dev, local_ip, peer_ip, local_port, peer_port,
1356 GET_POPEN_TOS(ntohl(req->tos_stid)));
1358 printk(KERN_ERR MOD "%s - failed to find dst entry!\n",
1363 if (dst->neighbour->dev->flags & IFF_LOOPBACK) {
1364 pdev = ip_dev_find(&init_net, peer_ip);
1366 l2t = cxgb4_l2t_get(dev->rdev.lldi.l2t, dst->neighbour,
1369 tx_chan = cxgb4_port_chan(pdev);
1370 smac_idx = (cxgb4_port_viid(pdev) & 0x7F) << 1;
1371 step = dev->rdev.lldi.ntxq / dev->rdev.lldi.nchan;
1372 txq_idx = cxgb4_port_idx(pdev) * step;
1373 ctrlq_idx = cxgb4_port_idx(pdev);
1374 step = dev->rdev.lldi.nrxq / dev->rdev.lldi.nchan;
1375 rss_qid = dev->rdev.lldi.rxq_ids[cxgb4_port_idx(pdev) * step];
1378 l2t = cxgb4_l2t_get(dev->rdev.lldi.l2t, dst->neighbour,
1379 dst->neighbour->dev, 0);
1381 tx_chan = cxgb4_port_chan(dst->neighbour->dev);
1382 smac_idx = (cxgb4_port_viid(dst->neighbour->dev) & 0x7F) << 1;
1383 step = dev->rdev.lldi.ntxq / dev->rdev.lldi.nchan;
1384 txq_idx = cxgb4_port_idx(dst->neighbour->dev) * step;
1385 ctrlq_idx = cxgb4_port_idx(dst->neighbour->dev);
1386 step = dev->rdev.lldi.nrxq / dev->rdev.lldi.nchan;
1387 rss_qid = dev->rdev.lldi.rxq_ids[
1388 cxgb4_port_idx(dst->neighbour->dev) * step];
1391 printk(KERN_ERR MOD "%s - failed to allocate l2t entry!\n",
1397 child_ep = alloc_ep(sizeof(*child_ep), GFP_KERNEL);
1399 printk(KERN_ERR MOD "%s - failed to allocate ep entry!\n",
1401 cxgb4_l2t_release(l2t);
1405 state_set(&child_ep->com, CONNECTING);
1406 child_ep->com.dev = dev;
1407 child_ep->com.cm_id = NULL;
1408 child_ep->com.local_addr.sin_family = PF_INET;
1409 child_ep->com.local_addr.sin_port = local_port;
1410 child_ep->com.local_addr.sin_addr.s_addr = local_ip;
1411 child_ep->com.remote_addr.sin_family = PF_INET;
1412 child_ep->com.remote_addr.sin_port = peer_port;
1413 child_ep->com.remote_addr.sin_addr.s_addr = peer_ip;
1414 c4iw_get_ep(&parent_ep->com);
1415 child_ep->parent_ep = parent_ep;
1416 child_ep->tos = GET_POPEN_TOS(ntohl(req->tos_stid));
1417 child_ep->l2t = l2t;
1418 child_ep->dst = dst;
1419 child_ep->hwtid = hwtid;
1420 child_ep->tx_chan = tx_chan;
1421 child_ep->smac_idx = smac_idx;
1422 child_ep->rss_qid = rss_qid;
1423 child_ep->mtu = mtu;
1424 child_ep->txq_idx = txq_idx;
1425 child_ep->ctrlq_idx = ctrlq_idx;
1427 PDBG("%s tx_chan %u smac_idx %u rss_qid %u\n", __func__,
1428 tx_chan, smac_idx, rss_qid);
1430 init_timer(&child_ep->timer);
1431 cxgb4_insert_tid(t, child_ep, hwtid);
1432 accept_cr(child_ep, peer_ip, skb, req);
1435 reject_cr(dev, hwtid, peer_ip, skb);
1440 static int pass_establish(struct c4iw_dev *dev, struct sk_buff *skb)
1443 struct cpl_pass_establish *req = cplhdr(skb);
1444 struct tid_info *t = dev->rdev.lldi.tids;
1445 unsigned int tid = GET_TID(req);
1447 ep = lookup_tid(t, tid);
1448 PDBG("%s ep %p tid %u\n", __func__, ep, ep->hwtid);
1449 ep->snd_seq = be32_to_cpu(req->snd_isn);
1450 ep->rcv_seq = be32_to_cpu(req->rcv_isn);
1452 set_emss(ep, ntohs(req->tcp_opt));
1454 dst_confirm(ep->dst);
1455 state_set(&ep->com, MPA_REQ_WAIT);
1457 send_flowc(ep, skb);
1462 static int peer_close(struct c4iw_dev *dev, struct sk_buff *skb)
1464 struct cpl_peer_close *hdr = cplhdr(skb);
1466 struct c4iw_qp_attributes attrs;
1470 struct tid_info *t = dev->rdev.lldi.tids;
1471 unsigned int tid = GET_TID(hdr);
1473 ep = lookup_tid(t, tid);
1474 PDBG("%s ep %p tid %u\n", __func__, ep, ep->hwtid);
1475 dst_confirm(ep->dst);
1477 mutex_lock(&ep->com.mutex);
1478 switch (ep->com.state) {
1480 __state_set(&ep->com, CLOSING);
1483 __state_set(&ep->com, CLOSING);
1484 connect_reply_upcall(ep, -ECONNRESET);
1489 * We're gonna mark this puppy DEAD, but keep
1490 * the reference on it until the ULP accepts or
1491 * rejects the CR. Also wake up anyone waiting
1492 * in rdma connection migration (see c4iw_accept_cr()).
1494 __state_set(&ep->com, CLOSING);
1495 ep->com.wr_wait.done = 1;
1496 ep->com.wr_wait.ret = -ECONNRESET;
1497 PDBG("waking up ep %p tid %u\n", ep, ep->hwtid);
1498 wake_up(&ep->com.wr_wait.wait);
1501 __state_set(&ep->com, CLOSING);
1502 ep->com.wr_wait.done = 1;
1503 ep->com.wr_wait.ret = -ECONNRESET;
1504 PDBG("waking up ep %p tid %u\n", ep, ep->hwtid);
1505 wake_up(&ep->com.wr_wait.wait);
1509 __state_set(&ep->com, CLOSING);
1511 peer_close_upcall(ep);
1517 __state_set(&ep->com, MORIBUND);
1522 if (ep->com.cm_id && ep->com.qp) {
1523 attrs.next_state = C4IW_QP_STATE_IDLE;
1524 c4iw_modify_qp(ep->com.qp->rhp, ep->com.qp,
1525 C4IW_QP_ATTR_NEXT_STATE, &attrs, 1);
1527 close_complete_upcall(ep);
1528 __state_set(&ep->com, DEAD);
1538 mutex_unlock(&ep->com.mutex);
1540 attrs.next_state = C4IW_QP_STATE_CLOSING;
1541 c4iw_modify_qp(ep->com.qp->rhp, ep->com.qp,
1542 C4IW_QP_ATTR_NEXT_STATE, &attrs, 1);
1545 c4iw_ep_disconnect(ep, 0, GFP_KERNEL);
1547 release_ep_resources(ep);
1552 * Returns whether an ABORT_REQ_RSS message is a negative advice.
1554 static int is_neg_adv_abort(unsigned int status)
1556 return status == CPL_ERR_RTX_NEG_ADVICE ||
1557 status == CPL_ERR_PERSIST_NEG_ADVICE;
1560 static int peer_abort(struct c4iw_dev *dev, struct sk_buff *skb)
1562 struct cpl_abort_req_rss *req = cplhdr(skb);
1564 struct cpl_abort_rpl *rpl;
1565 struct sk_buff *rpl_skb;
1566 struct c4iw_qp_attributes attrs;
1569 struct tid_info *t = dev->rdev.lldi.tids;
1570 unsigned int tid = GET_TID(req);
1572 ep = lookup_tid(t, tid);
1573 if (is_neg_adv_abort(req->status)) {
1574 PDBG("%s neg_adv_abort ep %p tid %u\n", __func__, ep,
1578 PDBG("%s ep %p tid %u state %u\n", __func__, ep, ep->hwtid,
1582 * Wake up any threads in rdma_init() or rdma_fini().
1584 ep->com.wr_wait.done = 1;
1585 ep->com.wr_wait.ret = -ECONNRESET;
1586 wake_up(&ep->com.wr_wait.wait);
1588 mutex_lock(&ep->com.mutex);
1589 switch (ep->com.state) {
1597 connect_reply_upcall(ep, -ECONNRESET);
1608 if (ep->com.cm_id && ep->com.qp) {
1609 attrs.next_state = C4IW_QP_STATE_ERROR;
1610 ret = c4iw_modify_qp(ep->com.qp->rhp,
1611 ep->com.qp, C4IW_QP_ATTR_NEXT_STATE,
1615 "%s - qp <- error failed!\n",
1618 peer_abort_upcall(ep);
1623 PDBG("%s PEER_ABORT IN DEAD STATE!!!!\n", __func__);
1624 mutex_unlock(&ep->com.mutex);
1630 dst_confirm(ep->dst);
1631 if (ep->com.state != ABORTING) {
1632 __state_set(&ep->com, DEAD);
1635 mutex_unlock(&ep->com.mutex);
1637 rpl_skb = get_skb(skb, sizeof(*rpl), GFP_KERNEL);
1639 printk(KERN_ERR MOD "%s - cannot allocate skb!\n",
1644 set_wr_txq(skb, CPL_PRIORITY_DATA, ep->txq_idx);
1645 rpl = (struct cpl_abort_rpl *) skb_put(rpl_skb, sizeof(*rpl));
1646 INIT_TP_WR(rpl, ep->hwtid);
1647 OPCODE_TID(rpl) = cpu_to_be32(MK_OPCODE_TID(CPL_ABORT_RPL, ep->hwtid));
1648 rpl->cmd = CPL_ABORT_NO_RST;
1649 c4iw_ofld_send(&ep->com.dev->rdev, rpl_skb);
1652 release_ep_resources(ep);
1656 static int close_con_rpl(struct c4iw_dev *dev, struct sk_buff *skb)
1659 struct c4iw_qp_attributes attrs;
1660 struct cpl_close_con_rpl *rpl = cplhdr(skb);
1662 struct tid_info *t = dev->rdev.lldi.tids;
1663 unsigned int tid = GET_TID(rpl);
1665 ep = lookup_tid(t, tid);
1667 PDBG("%s ep %p tid %u\n", __func__, ep, ep->hwtid);
1670 /* The cm_id may be null if we failed to connect */
1671 mutex_lock(&ep->com.mutex);
1672 switch (ep->com.state) {
1674 __state_set(&ep->com, MORIBUND);
1678 if ((ep->com.cm_id) && (ep->com.qp)) {
1679 attrs.next_state = C4IW_QP_STATE_IDLE;
1680 c4iw_modify_qp(ep->com.qp->rhp,
1682 C4IW_QP_ATTR_NEXT_STATE,
1685 close_complete_upcall(ep);
1686 __state_set(&ep->com, DEAD);
1696 mutex_unlock(&ep->com.mutex);
1698 release_ep_resources(ep);
1702 static int terminate(struct c4iw_dev *dev, struct sk_buff *skb)
1704 struct cpl_rdma_terminate *rpl = cplhdr(skb);
1705 struct tid_info *t = dev->rdev.lldi.tids;
1706 unsigned int tid = GET_TID(rpl);
1708 struct c4iw_qp_attributes attrs;
1710 ep = lookup_tid(t, tid);
1714 printk(KERN_WARNING MOD "TERM received tid %u qpid %u\n", tid,
1715 ep->com.qp->wq.sq.qid);
1716 attrs.next_state = C4IW_QP_STATE_TERMINATE;
1717 c4iw_modify_qp(ep->com.qp->rhp, ep->com.qp,
1718 C4IW_QP_ATTR_NEXT_STATE, &attrs, 1);
1720 printk(KERN_WARNING MOD "TERM received tid %u no qp\n", tid);
1726 * Upcall from the adapter indicating data has been transmitted.
1727 * For us its just the single MPA request or reply. We can now free
1728 * the skb holding the mpa message.
1730 static int fw4_ack(struct c4iw_dev *dev, struct sk_buff *skb)
1733 struct cpl_fw4_ack *hdr = cplhdr(skb);
1734 u8 credits = hdr->credits;
1735 unsigned int tid = GET_TID(hdr);
1736 struct tid_info *t = dev->rdev.lldi.tids;
1739 ep = lookup_tid(t, tid);
1740 PDBG("%s ep %p tid %u credits %u\n", __func__, ep, ep->hwtid, credits);
1742 PDBG("%s 0 credit ack ep %p tid %u state %u\n",
1743 __func__, ep, ep->hwtid, state_read(&ep->com));
1747 dst_confirm(ep->dst);
1749 PDBG("%s last streaming msg ack ep %p tid %u state %u "
1750 "initiator %u freeing skb\n", __func__, ep, ep->hwtid,
1751 state_read(&ep->com), ep->mpa_attr.initiator ? 1 : 0);
1752 kfree_skb(ep->mpa_skb);
1758 int c4iw_reject_cr(struct iw_cm_id *cm_id, const void *pdata, u8 pdata_len)
1761 struct c4iw_ep *ep = to_ep(cm_id);
1762 PDBG("%s ep %p tid %u\n", __func__, ep, ep->hwtid);
1764 if (state_read(&ep->com) == DEAD) {
1765 c4iw_put_ep(&ep->com);
1768 BUG_ON(state_read(&ep->com) != MPA_REQ_RCVD);
1770 abort_connection(ep, NULL, GFP_KERNEL);
1772 err = send_mpa_reject(ep, pdata, pdata_len);
1773 err = c4iw_ep_disconnect(ep, 0, GFP_KERNEL);
1775 c4iw_put_ep(&ep->com);
1779 int c4iw_accept_cr(struct iw_cm_id *cm_id, struct iw_cm_conn_param *conn_param)
1782 struct c4iw_qp_attributes attrs;
1783 enum c4iw_qp_attr_mask mask;
1784 struct c4iw_ep *ep = to_ep(cm_id);
1785 struct c4iw_dev *h = to_c4iw_dev(cm_id->device);
1786 struct c4iw_qp *qp = get_qhp(h, conn_param->qpn);
1788 PDBG("%s ep %p tid %u\n", __func__, ep, ep->hwtid);
1789 if (state_read(&ep->com) == DEAD) {
1794 BUG_ON(state_read(&ep->com) != MPA_REQ_RCVD);
1797 if ((conn_param->ord > c4iw_max_read_depth) ||
1798 (conn_param->ird > c4iw_max_read_depth)) {
1799 abort_connection(ep, NULL, GFP_KERNEL);
1804 cm_id->add_ref(cm_id);
1805 ep->com.cm_id = cm_id;
1808 ep->ird = conn_param->ird;
1809 ep->ord = conn_param->ord;
1811 if (peer2peer && ep->ird == 0)
1814 PDBG("%s %d ird %d ord %d\n", __func__, __LINE__, ep->ird, ep->ord);
1816 /* bind QP to EP and move to RTS */
1817 attrs.mpa_attr = ep->mpa_attr;
1818 attrs.max_ird = ep->ird;
1819 attrs.max_ord = ep->ord;
1820 attrs.llp_stream_handle = ep;
1821 attrs.next_state = C4IW_QP_STATE_RTS;
1823 /* bind QP and TID with INIT_WR */
1824 mask = C4IW_QP_ATTR_NEXT_STATE |
1825 C4IW_QP_ATTR_LLP_STREAM_HANDLE |
1826 C4IW_QP_ATTR_MPA_ATTR |
1827 C4IW_QP_ATTR_MAX_IRD |
1828 C4IW_QP_ATTR_MAX_ORD;
1830 err = c4iw_modify_qp(ep->com.qp->rhp,
1831 ep->com.qp, mask, &attrs, 1);
1834 err = send_mpa_reply(ep, conn_param->private_data,
1835 conn_param->private_data_len);
1839 state_set(&ep->com, FPDU_MODE);
1840 established_upcall(ep);
1841 c4iw_put_ep(&ep->com);
1844 ep->com.cm_id = NULL;
1846 cm_id->rem_ref(cm_id);
1848 c4iw_put_ep(&ep->com);
1852 int c4iw_connect(struct iw_cm_id *cm_id, struct iw_cm_conn_param *conn_param)
1855 struct c4iw_dev *dev = to_c4iw_dev(cm_id->device);
1858 struct net_device *pdev;
1861 if ((conn_param->ord > c4iw_max_read_depth) ||
1862 (conn_param->ird > c4iw_max_read_depth)) {
1866 ep = alloc_ep(sizeof(*ep), GFP_KERNEL);
1868 printk(KERN_ERR MOD "%s - cannot alloc ep.\n", __func__);
1872 init_timer(&ep->timer);
1873 ep->plen = conn_param->private_data_len;
1875 memcpy(ep->mpa_pkt + sizeof(struct mpa_message),
1876 conn_param->private_data, ep->plen);
1877 ep->ird = conn_param->ird;
1878 ep->ord = conn_param->ord;
1880 if (peer2peer && ep->ord == 0)
1883 cm_id->add_ref(cm_id);
1885 ep->com.cm_id = cm_id;
1886 ep->com.qp = get_qhp(dev, conn_param->qpn);
1887 BUG_ON(!ep->com.qp);
1888 PDBG("%s qpn 0x%x qp %p cm_id %p\n", __func__, conn_param->qpn,
1892 * Allocate an active TID to initiate a TCP connection.
1894 ep->atid = cxgb4_alloc_atid(dev->rdev.lldi.tids, ep);
1895 if (ep->atid == -1) {
1896 printk(KERN_ERR MOD "%s - cannot alloc atid.\n", __func__);
1901 PDBG("%s saddr 0x%x sport 0x%x raddr 0x%x rport 0x%x\n", __func__,
1902 ntohl(cm_id->local_addr.sin_addr.s_addr),
1903 ntohs(cm_id->local_addr.sin_port),
1904 ntohl(cm_id->remote_addr.sin_addr.s_addr),
1905 ntohs(cm_id->remote_addr.sin_port));
1908 rt = find_route(dev,
1909 cm_id->local_addr.sin_addr.s_addr,
1910 cm_id->remote_addr.sin_addr.s_addr,
1911 cm_id->local_addr.sin_port,
1912 cm_id->remote_addr.sin_port, 0);
1914 printk(KERN_ERR MOD "%s - cannot find route.\n", __func__);
1915 err = -EHOSTUNREACH;
1920 /* get a l2t entry */
1921 if (ep->dst->neighbour->dev->flags & IFF_LOOPBACK) {
1922 PDBG("%s LOOPBACK\n", __func__);
1923 pdev = ip_dev_find(&init_net,
1924 cm_id->remote_addr.sin_addr.s_addr);
1925 ep->l2t = cxgb4_l2t_get(ep->com.dev->rdev.lldi.l2t,
1928 ep->mtu = pdev->mtu;
1929 ep->tx_chan = cxgb4_port_chan(pdev);
1930 ep->smac_idx = (cxgb4_port_viid(pdev) & 0x7F) << 1;
1931 step = ep->com.dev->rdev.lldi.ntxq /
1932 ep->com.dev->rdev.lldi.nchan;
1933 ep->txq_idx = cxgb4_port_idx(pdev) * step;
1934 step = ep->com.dev->rdev.lldi.nrxq /
1935 ep->com.dev->rdev.lldi.nchan;
1936 ep->ctrlq_idx = cxgb4_port_idx(pdev);
1937 ep->rss_qid = ep->com.dev->rdev.lldi.rxq_ids[
1938 cxgb4_port_idx(pdev) * step];
1941 ep->l2t = cxgb4_l2t_get(ep->com.dev->rdev.lldi.l2t,
1943 ep->dst->neighbour->dev, 0);
1944 ep->mtu = dst_mtu(ep->dst);
1945 ep->tx_chan = cxgb4_port_chan(ep->dst->neighbour->dev);
1946 ep->smac_idx = (cxgb4_port_viid(ep->dst->neighbour->dev) &
1948 step = ep->com.dev->rdev.lldi.ntxq /
1949 ep->com.dev->rdev.lldi.nchan;
1950 ep->txq_idx = cxgb4_port_idx(ep->dst->neighbour->dev) * step;
1951 ep->ctrlq_idx = cxgb4_port_idx(ep->dst->neighbour->dev);
1952 step = ep->com.dev->rdev.lldi.nrxq /
1953 ep->com.dev->rdev.lldi.nchan;
1954 ep->rss_qid = ep->com.dev->rdev.lldi.rxq_ids[
1955 cxgb4_port_idx(ep->dst->neighbour->dev) * step];
1958 printk(KERN_ERR MOD "%s - cannot alloc l2e.\n", __func__);
1963 PDBG("%s txq_idx %u tx_chan %u smac_idx %u rss_qid %u l2t_idx %u\n",
1964 __func__, ep->txq_idx, ep->tx_chan, ep->smac_idx, ep->rss_qid,
1967 state_set(&ep->com, CONNECTING);
1969 ep->com.local_addr = cm_id->local_addr;
1970 ep->com.remote_addr = cm_id->remote_addr;
1972 /* send connect request to rnic */
1973 err = send_connect(ep);
1977 cxgb4_l2t_release(ep->l2t);
1979 dst_release(ep->dst);
1981 cxgb4_free_atid(ep->com.dev->rdev.lldi.tids, ep->atid);
1983 cm_id->rem_ref(cm_id);
1984 c4iw_put_ep(&ep->com);
1989 int c4iw_create_listen(struct iw_cm_id *cm_id, int backlog)
1992 struct c4iw_dev *dev = to_c4iw_dev(cm_id->device);
1993 struct c4iw_listen_ep *ep;
1998 ep = alloc_ep(sizeof(*ep), GFP_KERNEL);
2000 printk(KERN_ERR MOD "%s - cannot alloc ep.\n", __func__);
2004 PDBG("%s ep %p\n", __func__, ep);
2005 cm_id->add_ref(cm_id);
2006 ep->com.cm_id = cm_id;
2008 ep->backlog = backlog;
2009 ep->com.local_addr = cm_id->local_addr;
2012 * Allocate a server TID.
2014 ep->stid = cxgb4_alloc_stid(dev->rdev.lldi.tids, PF_INET, ep);
2015 if (ep->stid == -1) {
2016 printk(KERN_ERR MOD "%s - cannot alloc stid.\n", __func__);
2021 state_set(&ep->com, LISTEN);
2022 c4iw_init_wr_wait(&ep->com.wr_wait);
2023 err = cxgb4_create_server(ep->com.dev->rdev.lldi.ports[0], ep->stid,
2024 ep->com.local_addr.sin_addr.s_addr,
2025 ep->com.local_addr.sin_port,
2026 ep->com.dev->rdev.lldi.rxq_ids[0]);
2030 /* wait for pass_open_rpl */
2031 err = c4iw_wait_for_reply(&ep->com.dev->rdev, &ep->com.wr_wait, 0, 0,
2034 cm_id->provider_data = ep;
2038 cxgb4_free_stid(ep->com.dev->rdev.lldi.tids, ep->stid, PF_INET);
2040 cm_id->rem_ref(cm_id);
2041 c4iw_put_ep(&ep->com);
2047 int c4iw_destroy_listen(struct iw_cm_id *cm_id)
2050 struct c4iw_listen_ep *ep = to_listen_ep(cm_id);
2052 PDBG("%s ep %p\n", __func__, ep);
2055 state_set(&ep->com, DEAD);
2056 c4iw_init_wr_wait(&ep->com.wr_wait);
2057 err = listen_stop(ep);
2060 err = c4iw_wait_for_reply(&ep->com.dev->rdev, &ep->com.wr_wait, 0, 0,
2062 cxgb4_free_stid(ep->com.dev->rdev.lldi.tids, ep->stid, PF_INET);
2064 cm_id->rem_ref(cm_id);
2065 c4iw_put_ep(&ep->com);
2069 int c4iw_ep_disconnect(struct c4iw_ep *ep, int abrupt, gfp_t gfp)
2074 struct c4iw_rdev *rdev;
2076 mutex_lock(&ep->com.mutex);
2078 PDBG("%s ep %p state %s, abrupt %d\n", __func__, ep,
2079 states[ep->com.state], abrupt);
2081 rdev = &ep->com.dev->rdev;
2082 if (c4iw_fatal_error(rdev)) {
2084 close_complete_upcall(ep);
2085 ep->com.state = DEAD;
2087 switch (ep->com.state) {
2095 ep->com.state = ABORTING;
2097 ep->com.state = CLOSING;
2100 set_bit(CLOSE_SENT, &ep->com.flags);
2103 if (!test_and_set_bit(CLOSE_SENT, &ep->com.flags)) {
2107 ep->com.state = ABORTING;
2109 ep->com.state = MORIBUND;
2115 PDBG("%s ignoring disconnect ep %p state %u\n",
2116 __func__, ep, ep->com.state);
2123 mutex_unlock(&ep->com.mutex);
2126 ret = abort_connection(ep, NULL, gfp);
2128 ret = send_halfclose(ep, gfp);
2133 release_ep_resources(ep);
2137 static int async_event(struct c4iw_dev *dev, struct sk_buff *skb)
2139 struct cpl_fw6_msg *rpl = cplhdr(skb);
2140 c4iw_ev_dispatch(dev, (struct t4_cqe *)&rpl->data[0]);
2145 * These are the real handlers that are called from a
2148 static c4iw_handler_func work_handlers[NUM_CPL_CMDS] = {
2149 [CPL_ACT_ESTABLISH] = act_establish,
2150 [CPL_ACT_OPEN_RPL] = act_open_rpl,
2151 [CPL_RX_DATA] = rx_data,
2152 [CPL_ABORT_RPL_RSS] = abort_rpl,
2153 [CPL_ABORT_RPL] = abort_rpl,
2154 [CPL_PASS_OPEN_RPL] = pass_open_rpl,
2155 [CPL_CLOSE_LISTSRV_RPL] = close_listsrv_rpl,
2156 [CPL_PASS_ACCEPT_REQ] = pass_accept_req,
2157 [CPL_PASS_ESTABLISH] = pass_establish,
2158 [CPL_PEER_CLOSE] = peer_close,
2159 [CPL_ABORT_REQ_RSS] = peer_abort,
2160 [CPL_CLOSE_CON_RPL] = close_con_rpl,
2161 [CPL_RDMA_TERMINATE] = terminate,
2162 [CPL_FW4_ACK] = fw4_ack,
2163 [CPL_FW6_MSG] = async_event
2166 static void process_timeout(struct c4iw_ep *ep)
2168 struct c4iw_qp_attributes attrs;
2171 mutex_lock(&ep->com.mutex);
2172 PDBG("%s ep %p tid %u state %d\n", __func__, ep, ep->hwtid,
2174 switch (ep->com.state) {
2176 __state_set(&ep->com, ABORTING);
2177 connect_reply_upcall(ep, -ETIMEDOUT);
2180 __state_set(&ep->com, ABORTING);
2184 if (ep->com.cm_id && ep->com.qp) {
2185 attrs.next_state = C4IW_QP_STATE_ERROR;
2186 c4iw_modify_qp(ep->com.qp->rhp,
2187 ep->com.qp, C4IW_QP_ATTR_NEXT_STATE,
2190 __state_set(&ep->com, ABORTING);
2193 printk(KERN_ERR "%s unexpected state ep %p tid %u state %u\n",
2194 __func__, ep, ep->hwtid, ep->com.state);
2198 mutex_unlock(&ep->com.mutex);
2200 abort_connection(ep, NULL, GFP_KERNEL);
2201 c4iw_put_ep(&ep->com);
2204 static void process_timedout_eps(void)
2208 spin_lock_irq(&timeout_lock);
2209 while (!list_empty(&timeout_list)) {
2210 struct list_head *tmp;
2212 tmp = timeout_list.next;
2214 spin_unlock_irq(&timeout_lock);
2215 ep = list_entry(tmp, struct c4iw_ep, entry);
2216 process_timeout(ep);
2217 spin_lock_irq(&timeout_lock);
2219 spin_unlock_irq(&timeout_lock);
2222 static void process_work(struct work_struct *work)
2224 struct sk_buff *skb = NULL;
2225 struct c4iw_dev *dev;
2226 struct cpl_act_establish *rpl;
2227 unsigned int opcode;
2230 while ((skb = skb_dequeue(&rxq))) {
2232 dev = *((struct c4iw_dev **) (skb->cb + sizeof(void *)));
2233 opcode = rpl->ot.opcode;
2235 BUG_ON(!work_handlers[opcode]);
2236 ret = work_handlers[opcode](dev, skb);
2240 process_timedout_eps();
2243 static DECLARE_WORK(skb_work, process_work);
2245 static void ep_timeout(unsigned long arg)
2247 struct c4iw_ep *ep = (struct c4iw_ep *)arg;
2249 spin_lock(&timeout_lock);
2250 list_add_tail(&ep->entry, &timeout_list);
2251 spin_unlock(&timeout_lock);
2252 queue_work(workq, &skb_work);
2256 * All the CM events are handled on a work queue to have a safe context.
2258 static int sched(struct c4iw_dev *dev, struct sk_buff *skb)
2262 * Save dev in the skb->cb area.
2264 *((struct c4iw_dev **) (skb->cb + sizeof(void *))) = dev;
2267 * Queue the skb and schedule the worker thread.
2269 skb_queue_tail(&rxq, skb);
2270 queue_work(workq, &skb_work);
2274 static int set_tcb_rpl(struct c4iw_dev *dev, struct sk_buff *skb)
2276 struct cpl_set_tcb_rpl *rpl = cplhdr(skb);
2278 if (rpl->status != CPL_ERR_NONE) {
2279 printk(KERN_ERR MOD "Unexpected SET_TCB_RPL status %u "
2280 "for tid %u\n", rpl->status, GET_TID(rpl));
2286 static int fw6_msg(struct c4iw_dev *dev, struct sk_buff *skb)
2288 struct cpl_fw6_msg *rpl = cplhdr(skb);
2289 struct c4iw_wr_wait *wr_waitp;
2292 PDBG("%s type %u\n", __func__, rpl->type);
2294 switch (rpl->type) {
2296 ret = (int)((be64_to_cpu(rpl->data[0]) >> 8) & 0xff);
2297 wr_waitp = (struct c4iw_wr_wait *)(__force unsigned long) rpl->data[1];
2298 PDBG("%s wr_waitp %p ret %u\n", __func__, wr_waitp, ret);
2301 wr_waitp->ret = -ret;
2305 wake_up(&wr_waitp->wait);
2313 printk(KERN_ERR MOD "%s unexpected fw6 msg type %u\n", __func__,
2322 * Most upcalls from the T4 Core go to sched() to
2323 * schedule the processing on a work queue.
2325 c4iw_handler_func c4iw_handlers[NUM_CPL_CMDS] = {
2326 [CPL_ACT_ESTABLISH] = sched,
2327 [CPL_ACT_OPEN_RPL] = sched,
2328 [CPL_RX_DATA] = sched,
2329 [CPL_ABORT_RPL_RSS] = sched,
2330 [CPL_ABORT_RPL] = sched,
2331 [CPL_PASS_OPEN_RPL] = sched,
2332 [CPL_CLOSE_LISTSRV_RPL] = sched,
2333 [CPL_PASS_ACCEPT_REQ] = sched,
2334 [CPL_PASS_ESTABLISH] = sched,
2335 [CPL_PEER_CLOSE] = sched,
2336 [CPL_CLOSE_CON_RPL] = sched,
2337 [CPL_ABORT_REQ_RSS] = sched,
2338 [CPL_RDMA_TERMINATE] = sched,
2339 [CPL_FW4_ACK] = sched,
2340 [CPL_SET_TCB_RPL] = set_tcb_rpl,
2341 [CPL_FW6_MSG] = fw6_msg
2344 int __init c4iw_cm_init(void)
2346 spin_lock_init(&timeout_lock);
2347 skb_queue_head_init(&rxq);
2349 workq = create_singlethread_workqueue("iw_cxgb4");
2356 void __exit c4iw_cm_term(void)
2358 WARN_ON(!list_empty(&timeout_list));
2359 flush_workqueue(workq);
2360 destroy_workqueue(workq);