xref: /openbmc/linux/drivers/infiniband/hw/cxgb4/cm.c (revision b6bec26c)
1 /*
2  * Copyright (c) 2009-2010 Chelsio, Inc. All rights reserved.
3  *
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:
9  *
10  *     Redistribution and use in source and binary forms, with or
11  *     without modification, are permitted provided that the following
12  *     conditions are met:
13  *
14  *      - Redistributions of source code must retain the above
15  *	  copyright notice, this list of conditions and the following
16  *	  disclaimer.
17  *
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.
22  *
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
30  * SOFTWARE.
31  */
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>
39 #include <linux/ip.h>
40 #include <linux/tcp.h>
41 #include <linux/if_vlan.h>
42 
43 #include <net/neighbour.h>
44 #include <net/netevent.h>
45 #include <net/route.h>
46 #include <net/tcp.h>
47 
48 #include "iw_cxgb4.h"
49 
50 static char *states[] = {
51 	"idle",
52 	"listen",
53 	"connecting",
54 	"mpa_wait_req",
55 	"mpa_req_sent",
56 	"mpa_req_rcvd",
57 	"mpa_rep_sent",
58 	"fpdu_mode",
59 	"aborting",
60 	"closing",
61 	"moribund",
62 	"dead",
63 	NULL,
64 };
65 
66 static int nocong;
67 module_param(nocong, int, 0644);
68 MODULE_PARM_DESC(nocong, "Turn of congestion control (default=0)");
69 
70 static int enable_ecn;
71 module_param(enable_ecn, int, 0644);
72 MODULE_PARM_DESC(enable_ecn, "Enable ECN (default=0/disabled)");
73 
74 static int dack_mode = 1;
75 module_param(dack_mode, int, 0644);
76 MODULE_PARM_DESC(dack_mode, "Delayed ack mode (default=1)");
77 
78 int c4iw_max_read_depth = 8;
79 module_param(c4iw_max_read_depth, int, 0644);
80 MODULE_PARM_DESC(c4iw_max_read_depth, "Per-connection max ORD/IRD (default=8)");
81 
82 static int enable_tcp_timestamps;
83 module_param(enable_tcp_timestamps, int, 0644);
84 MODULE_PARM_DESC(enable_tcp_timestamps, "Enable tcp timestamps (default=0)");
85 
86 static int enable_tcp_sack;
87 module_param(enable_tcp_sack, int, 0644);
88 MODULE_PARM_DESC(enable_tcp_sack, "Enable tcp SACK (default=0)");
89 
90 static int enable_tcp_window_scaling = 1;
91 module_param(enable_tcp_window_scaling, int, 0644);
92 MODULE_PARM_DESC(enable_tcp_window_scaling,
93 		 "Enable tcp window scaling (default=1)");
94 
95 int c4iw_debug;
96 module_param(c4iw_debug, int, 0644);
97 MODULE_PARM_DESC(c4iw_debug, "Enable debug logging (default=0)");
98 
99 static int peer2peer;
100 module_param(peer2peer, int, 0644);
101 MODULE_PARM_DESC(peer2peer, "Support peer2peer ULPs (default=0)");
102 
103 static int p2p_type = FW_RI_INIT_P2PTYPE_READ_REQ;
104 module_param(p2p_type, int, 0644);
105 MODULE_PARM_DESC(p2p_type, "RDMAP opcode to use for the RTR message: "
106 			   "1=RDMA_READ 0=RDMA_WRITE (default 1)");
107 
108 static int ep_timeout_secs = 60;
109 module_param(ep_timeout_secs, int, 0644);
110 MODULE_PARM_DESC(ep_timeout_secs, "CM Endpoint operation timeout "
111 				   "in seconds (default=60)");
112 
113 static int mpa_rev = 1;
114 module_param(mpa_rev, int, 0644);
115 MODULE_PARM_DESC(mpa_rev, "MPA Revision, 0 supports amso1100, "
116 		"1 is RFC0544 spec compliant, 2 is IETF MPA Peer Connect Draft"
117 		" compliant (default=1)");
118 
119 static int markers_enabled;
120 module_param(markers_enabled, int, 0644);
121 MODULE_PARM_DESC(markers_enabled, "Enable MPA MARKERS (default(0)=disabled)");
122 
123 static int crc_enabled = 1;
124 module_param(crc_enabled, int, 0644);
125 MODULE_PARM_DESC(crc_enabled, "Enable MPA CRC (default(1)=enabled)");
126 
127 static int rcv_win = 256 * 1024;
128 module_param(rcv_win, int, 0644);
129 MODULE_PARM_DESC(rcv_win, "TCP receive window in bytes (default=256KB)");
130 
131 static int snd_win = 128 * 1024;
132 module_param(snd_win, int, 0644);
133 MODULE_PARM_DESC(snd_win, "TCP send window in bytes (default=128KB)");
134 
135 static struct workqueue_struct *workq;
136 
137 static struct sk_buff_head rxq;
138 
139 static struct sk_buff *get_skb(struct sk_buff *skb, int len, gfp_t gfp);
140 static void ep_timeout(unsigned long arg);
141 static void connect_reply_upcall(struct c4iw_ep *ep, int status);
142 
143 static LIST_HEAD(timeout_list);
144 static spinlock_t timeout_lock;
145 
146 static void start_ep_timer(struct c4iw_ep *ep)
147 {
148 	PDBG("%s ep %p\n", __func__, ep);
149 	if (timer_pending(&ep->timer)) {
150 		PDBG("%s stopped / restarted timer ep %p\n", __func__, ep);
151 		del_timer_sync(&ep->timer);
152 	} else
153 		c4iw_get_ep(&ep->com);
154 	ep->timer.expires = jiffies + ep_timeout_secs * HZ;
155 	ep->timer.data = (unsigned long)ep;
156 	ep->timer.function = ep_timeout;
157 	add_timer(&ep->timer);
158 }
159 
160 static void stop_ep_timer(struct c4iw_ep *ep)
161 {
162 	PDBG("%s ep %p\n", __func__, ep);
163 	if (!timer_pending(&ep->timer)) {
164 		WARN(1, "%s timer stopped when its not running! "
165 		       "ep %p state %u\n", __func__, ep, ep->com.state);
166 		return;
167 	}
168 	del_timer_sync(&ep->timer);
169 	c4iw_put_ep(&ep->com);
170 }
171 
172 static int c4iw_l2t_send(struct c4iw_rdev *rdev, struct sk_buff *skb,
173 		  struct l2t_entry *l2e)
174 {
175 	int	error = 0;
176 
177 	if (c4iw_fatal_error(rdev)) {
178 		kfree_skb(skb);
179 		PDBG("%s - device in error state - dropping\n", __func__);
180 		return -EIO;
181 	}
182 	error = cxgb4_l2t_send(rdev->lldi.ports[0], skb, l2e);
183 	if (error < 0)
184 		kfree_skb(skb);
185 	return error < 0 ? error : 0;
186 }
187 
188 int c4iw_ofld_send(struct c4iw_rdev *rdev, struct sk_buff *skb)
189 {
190 	int	error = 0;
191 
192 	if (c4iw_fatal_error(rdev)) {
193 		kfree_skb(skb);
194 		PDBG("%s - device in error state - dropping\n", __func__);
195 		return -EIO;
196 	}
197 	error = cxgb4_ofld_send(rdev->lldi.ports[0], skb);
198 	if (error < 0)
199 		kfree_skb(skb);
200 	return error < 0 ? error : 0;
201 }
202 
203 static void release_tid(struct c4iw_rdev *rdev, u32 hwtid, struct sk_buff *skb)
204 {
205 	struct cpl_tid_release *req;
206 
207 	skb = get_skb(skb, sizeof *req, GFP_KERNEL);
208 	if (!skb)
209 		return;
210 	req = (struct cpl_tid_release *) skb_put(skb, sizeof(*req));
211 	INIT_TP_WR(req, hwtid);
212 	OPCODE_TID(req) = cpu_to_be32(MK_OPCODE_TID(CPL_TID_RELEASE, hwtid));
213 	set_wr_txq(skb, CPL_PRIORITY_SETUP, 0);
214 	c4iw_ofld_send(rdev, skb);
215 	return;
216 }
217 
218 static void set_emss(struct c4iw_ep *ep, u16 opt)
219 {
220 	ep->emss = ep->com.dev->rdev.lldi.mtus[GET_TCPOPT_MSS(opt)] - 40;
221 	ep->mss = ep->emss;
222 	if (GET_TCPOPT_TSTAMP(opt))
223 		ep->emss -= 12;
224 	if (ep->emss < 128)
225 		ep->emss = 128;
226 	PDBG("%s mss_idx %u mss %u emss=%u\n", __func__, GET_TCPOPT_MSS(opt),
227 	     ep->mss, ep->emss);
228 }
229 
230 static enum c4iw_ep_state state_read(struct c4iw_ep_common *epc)
231 {
232 	enum c4iw_ep_state state;
233 
234 	mutex_lock(&epc->mutex);
235 	state = epc->state;
236 	mutex_unlock(&epc->mutex);
237 	return state;
238 }
239 
240 static void __state_set(struct c4iw_ep_common *epc, enum c4iw_ep_state new)
241 {
242 	epc->state = new;
243 }
244 
245 static void state_set(struct c4iw_ep_common *epc, enum c4iw_ep_state new)
246 {
247 	mutex_lock(&epc->mutex);
248 	PDBG("%s - %s -> %s\n", __func__, states[epc->state], states[new]);
249 	__state_set(epc, new);
250 	mutex_unlock(&epc->mutex);
251 	return;
252 }
253 
254 static void *alloc_ep(int size, gfp_t gfp)
255 {
256 	struct c4iw_ep_common *epc;
257 
258 	epc = kzalloc(size, gfp);
259 	if (epc) {
260 		kref_init(&epc->kref);
261 		mutex_init(&epc->mutex);
262 		c4iw_init_wr_wait(&epc->wr_wait);
263 	}
264 	PDBG("%s alloc ep %p\n", __func__, epc);
265 	return epc;
266 }
267 
268 void _c4iw_free_ep(struct kref *kref)
269 {
270 	struct c4iw_ep *ep;
271 
272 	ep = container_of(kref, struct c4iw_ep, com.kref);
273 	PDBG("%s ep %p state %s\n", __func__, ep, states[state_read(&ep->com)]);
274 	if (test_bit(RELEASE_RESOURCES, &ep->com.flags)) {
275 		cxgb4_remove_tid(ep->com.dev->rdev.lldi.tids, 0, ep->hwtid);
276 		dst_release(ep->dst);
277 		cxgb4_l2t_release(ep->l2t);
278 		remove_handle(ep->com.dev, &ep->com.dev->hwtid_idr, ep->hwtid);
279 	}
280 	kfree(ep);
281 }
282 
283 static void release_ep_resources(struct c4iw_ep *ep)
284 {
285 	set_bit(RELEASE_RESOURCES, &ep->com.flags);
286 	c4iw_put_ep(&ep->com);
287 }
288 
289 static int status2errno(int status)
290 {
291 	switch (status) {
292 	case CPL_ERR_NONE:
293 		return 0;
294 	case CPL_ERR_CONN_RESET:
295 		return -ECONNRESET;
296 	case CPL_ERR_ARP_MISS:
297 		return -EHOSTUNREACH;
298 	case CPL_ERR_CONN_TIMEDOUT:
299 		return -ETIMEDOUT;
300 	case CPL_ERR_TCAM_FULL:
301 		return -ENOMEM;
302 	case CPL_ERR_CONN_EXIST:
303 		return -EADDRINUSE;
304 	default:
305 		return -EIO;
306 	}
307 }
308 
309 /*
310  * Try and reuse skbs already allocated...
311  */
312 static struct sk_buff *get_skb(struct sk_buff *skb, int len, gfp_t gfp)
313 {
314 	if (skb && !skb_is_nonlinear(skb) && !skb_cloned(skb)) {
315 		skb_trim(skb, 0);
316 		skb_get(skb);
317 		skb_reset_transport_header(skb);
318 	} else {
319 		skb = alloc_skb(len, gfp);
320 	}
321 	return skb;
322 }
323 
324 static struct rtable *find_route(struct c4iw_dev *dev, __be32 local_ip,
325 				 __be32 peer_ip, __be16 local_port,
326 				 __be16 peer_port, u8 tos)
327 {
328 	struct rtable *rt;
329 	struct flowi4 fl4;
330 
331 	rt = ip_route_output_ports(&init_net, &fl4, NULL, peer_ip, local_ip,
332 				   peer_port, local_port, IPPROTO_TCP,
333 				   tos, 0);
334 	if (IS_ERR(rt))
335 		return NULL;
336 	return rt;
337 }
338 
339 static void arp_failure_discard(void *handle, struct sk_buff *skb)
340 {
341 	PDBG("%s c4iw_dev %p\n", __func__, handle);
342 	kfree_skb(skb);
343 }
344 
345 /*
346  * Handle an ARP failure for an active open.
347  */
348 static void act_open_req_arp_failure(void *handle, struct sk_buff *skb)
349 {
350 	printk(KERN_ERR MOD "ARP failure duing connect\n");
351 	kfree_skb(skb);
352 }
353 
354 /*
355  * Handle an ARP failure for a CPL_ABORT_REQ.  Change it into a no RST variant
356  * and send it along.
357  */
358 static void abort_arp_failure(void *handle, struct sk_buff *skb)
359 {
360 	struct c4iw_rdev *rdev = handle;
361 	struct cpl_abort_req *req = cplhdr(skb);
362 
363 	PDBG("%s rdev %p\n", __func__, rdev);
364 	req->cmd = CPL_ABORT_NO_RST;
365 	c4iw_ofld_send(rdev, skb);
366 }
367 
368 static void send_flowc(struct c4iw_ep *ep, struct sk_buff *skb)
369 {
370 	unsigned int flowclen = 80;
371 	struct fw_flowc_wr *flowc;
372 	int i;
373 
374 	skb = get_skb(skb, flowclen, GFP_KERNEL);
375 	flowc = (struct fw_flowc_wr *)__skb_put(skb, flowclen);
376 
377 	flowc->op_to_nparams = cpu_to_be32(FW_WR_OP(FW_FLOWC_WR) |
378 					   FW_FLOWC_WR_NPARAMS(8));
379 	flowc->flowid_len16 = cpu_to_be32(FW_WR_LEN16(DIV_ROUND_UP(flowclen,
380 					  16)) | FW_WR_FLOWID(ep->hwtid));
381 
382 	flowc->mnemval[0].mnemonic = FW_FLOWC_MNEM_PFNVFN;
383 	flowc->mnemval[0].val = cpu_to_be32(PCI_FUNC(ep->com.dev->rdev.lldi.pdev->devfn) << 8);
384 	flowc->mnemval[1].mnemonic = FW_FLOWC_MNEM_CH;
385 	flowc->mnemval[1].val = cpu_to_be32(ep->tx_chan);
386 	flowc->mnemval[2].mnemonic = FW_FLOWC_MNEM_PORT;
387 	flowc->mnemval[2].val = cpu_to_be32(ep->tx_chan);
388 	flowc->mnemval[3].mnemonic = FW_FLOWC_MNEM_IQID;
389 	flowc->mnemval[3].val = cpu_to_be32(ep->rss_qid);
390 	flowc->mnemval[4].mnemonic = FW_FLOWC_MNEM_SNDNXT;
391 	flowc->mnemval[4].val = cpu_to_be32(ep->snd_seq);
392 	flowc->mnemval[5].mnemonic = FW_FLOWC_MNEM_RCVNXT;
393 	flowc->mnemval[5].val = cpu_to_be32(ep->rcv_seq);
394 	flowc->mnemval[6].mnemonic = FW_FLOWC_MNEM_SNDBUF;
395 	flowc->mnemval[6].val = cpu_to_be32(snd_win);
396 	flowc->mnemval[7].mnemonic = FW_FLOWC_MNEM_MSS;
397 	flowc->mnemval[7].val = cpu_to_be32(ep->emss);
398 	/* Pad WR to 16 byte boundary */
399 	flowc->mnemval[8].mnemonic = 0;
400 	flowc->mnemval[8].val = 0;
401 	for (i = 0; i < 9; i++) {
402 		flowc->mnemval[i].r4[0] = 0;
403 		flowc->mnemval[i].r4[1] = 0;
404 		flowc->mnemval[i].r4[2] = 0;
405 	}
406 
407 	set_wr_txq(skb, CPL_PRIORITY_DATA, ep->txq_idx);
408 	c4iw_ofld_send(&ep->com.dev->rdev, skb);
409 }
410 
411 static int send_halfclose(struct c4iw_ep *ep, gfp_t gfp)
412 {
413 	struct cpl_close_con_req *req;
414 	struct sk_buff *skb;
415 	int wrlen = roundup(sizeof *req, 16);
416 
417 	PDBG("%s ep %p tid %u\n", __func__, ep, ep->hwtid);
418 	skb = get_skb(NULL, wrlen, gfp);
419 	if (!skb) {
420 		printk(KERN_ERR MOD "%s - failed to alloc skb\n", __func__);
421 		return -ENOMEM;
422 	}
423 	set_wr_txq(skb, CPL_PRIORITY_DATA, ep->txq_idx);
424 	t4_set_arp_err_handler(skb, NULL, arp_failure_discard);
425 	req = (struct cpl_close_con_req *) skb_put(skb, wrlen);
426 	memset(req, 0, wrlen);
427 	INIT_TP_WR(req, ep->hwtid);
428 	OPCODE_TID(req) = cpu_to_be32(MK_OPCODE_TID(CPL_CLOSE_CON_REQ,
429 						    ep->hwtid));
430 	return c4iw_l2t_send(&ep->com.dev->rdev, skb, ep->l2t);
431 }
432 
433 static int send_abort(struct c4iw_ep *ep, struct sk_buff *skb, gfp_t gfp)
434 {
435 	struct cpl_abort_req *req;
436 	int wrlen = roundup(sizeof *req, 16);
437 
438 	PDBG("%s ep %p tid %u\n", __func__, ep, ep->hwtid);
439 	skb = get_skb(skb, wrlen, gfp);
440 	if (!skb) {
441 		printk(KERN_ERR MOD "%s - failed to alloc skb.\n",
442 		       __func__);
443 		return -ENOMEM;
444 	}
445 	set_wr_txq(skb, CPL_PRIORITY_DATA, ep->txq_idx);
446 	t4_set_arp_err_handler(skb, &ep->com.dev->rdev, abort_arp_failure);
447 	req = (struct cpl_abort_req *) skb_put(skb, wrlen);
448 	memset(req, 0, wrlen);
449 	INIT_TP_WR(req, ep->hwtid);
450 	OPCODE_TID(req) = cpu_to_be32(MK_OPCODE_TID(CPL_ABORT_REQ, ep->hwtid));
451 	req->cmd = CPL_ABORT_SEND_RST;
452 	return c4iw_l2t_send(&ep->com.dev->rdev, skb, ep->l2t);
453 }
454 
455 #define VLAN_NONE 0xfff
456 #define FILTER_SEL_VLAN_NONE 0xffff
457 #define FILTER_SEL_WIDTH_P_FC (3+1) /* port uses 3 bits, FCoE one bit */
458 #define FILTER_SEL_WIDTH_VIN_P_FC \
459 	(6 + 7 + FILTER_SEL_WIDTH_P_FC) /* 6 bits are unused, VF uses 7 bits*/
460 #define FILTER_SEL_WIDTH_TAG_P_FC \
461 	(3 + FILTER_SEL_WIDTH_VIN_P_FC) /* PF uses 3 bits */
462 #define FILTER_SEL_WIDTH_VLD_TAG_P_FC (1 + FILTER_SEL_WIDTH_TAG_P_FC)
463 
464 static unsigned int select_ntuple(struct c4iw_dev *dev, struct dst_entry *dst,
465 				  struct l2t_entry *l2t)
466 {
467 	unsigned int ntuple = 0;
468 	u32 viid;
469 
470 	switch (dev->rdev.lldi.filt_mode) {
471 
472 	/* default filter mode */
473 	case HW_TPL_FR_MT_PR_IV_P_FC:
474 		if (l2t->vlan == VLAN_NONE)
475 			ntuple |= FILTER_SEL_VLAN_NONE << FILTER_SEL_WIDTH_P_FC;
476 		else {
477 			ntuple |= l2t->vlan << FILTER_SEL_WIDTH_P_FC;
478 			ntuple |= 1 << FILTER_SEL_WIDTH_VLD_TAG_P_FC;
479 		}
480 		ntuple |= l2t->lport << S_PORT | IPPROTO_TCP <<
481 			  FILTER_SEL_WIDTH_VLD_TAG_P_FC;
482 		break;
483 	case HW_TPL_FR_MT_PR_OV_P_FC: {
484 		viid = cxgb4_port_viid(l2t->neigh->dev);
485 
486 		ntuple |= FW_VIID_VIN_GET(viid) << FILTER_SEL_WIDTH_P_FC;
487 		ntuple |= FW_VIID_PFN_GET(viid) << FILTER_SEL_WIDTH_VIN_P_FC;
488 		ntuple |= FW_VIID_VIVLD_GET(viid) << FILTER_SEL_WIDTH_TAG_P_FC;
489 		ntuple |= l2t->lport << S_PORT | IPPROTO_TCP <<
490 			  FILTER_SEL_WIDTH_VLD_TAG_P_FC;
491 		break;
492 	}
493 	default:
494 		break;
495 	}
496 	return ntuple;
497 }
498 
499 static int send_connect(struct c4iw_ep *ep)
500 {
501 	struct cpl_act_open_req *req;
502 	struct sk_buff *skb;
503 	u64 opt0;
504 	u32 opt2;
505 	unsigned int mtu_idx;
506 	int wscale;
507 	int wrlen = roundup(sizeof *req, 16);
508 
509 	PDBG("%s ep %p atid %u\n", __func__, ep, ep->atid);
510 
511 	skb = get_skb(NULL, wrlen, GFP_KERNEL);
512 	if (!skb) {
513 		printk(KERN_ERR MOD "%s - failed to alloc skb.\n",
514 		       __func__);
515 		return -ENOMEM;
516 	}
517 	set_wr_txq(skb, CPL_PRIORITY_SETUP, ep->ctrlq_idx);
518 
519 	cxgb4_best_mtu(ep->com.dev->rdev.lldi.mtus, ep->mtu, &mtu_idx);
520 	wscale = compute_wscale(rcv_win);
521 	opt0 = (nocong ? NO_CONG(1) : 0) |
522 	       KEEP_ALIVE(1) |
523 	       DELACK(1) |
524 	       WND_SCALE(wscale) |
525 	       MSS_IDX(mtu_idx) |
526 	       L2T_IDX(ep->l2t->idx) |
527 	       TX_CHAN(ep->tx_chan) |
528 	       SMAC_SEL(ep->smac_idx) |
529 	       DSCP(ep->tos) |
530 	       ULP_MODE(ULP_MODE_TCPDDP) |
531 	       RCV_BUFSIZ(rcv_win>>10);
532 	opt2 = RX_CHANNEL(0) |
533 	       CCTRL_ECN(enable_ecn) |
534 	       RSS_QUEUE_VALID | RSS_QUEUE(ep->rss_qid);
535 	if (enable_tcp_timestamps)
536 		opt2 |= TSTAMPS_EN(1);
537 	if (enable_tcp_sack)
538 		opt2 |= SACK_EN(1);
539 	if (wscale && enable_tcp_window_scaling)
540 		opt2 |= WND_SCALE_EN(1);
541 	t4_set_arp_err_handler(skb, NULL, act_open_req_arp_failure);
542 
543 	req = (struct cpl_act_open_req *) skb_put(skb, wrlen);
544 	INIT_TP_WR(req, 0);
545 	OPCODE_TID(req) = cpu_to_be32(
546 		MK_OPCODE_TID(CPL_ACT_OPEN_REQ, ((ep->rss_qid<<14)|ep->atid)));
547 	req->local_port = ep->com.local_addr.sin_port;
548 	req->peer_port = ep->com.remote_addr.sin_port;
549 	req->local_ip = ep->com.local_addr.sin_addr.s_addr;
550 	req->peer_ip = ep->com.remote_addr.sin_addr.s_addr;
551 	req->opt0 = cpu_to_be64(opt0);
552 	req->params = cpu_to_be32(select_ntuple(ep->com.dev, ep->dst, ep->l2t));
553 	req->opt2 = cpu_to_be32(opt2);
554 	set_bit(ACT_OPEN_REQ, &ep->com.history);
555 	return c4iw_l2t_send(&ep->com.dev->rdev, skb, ep->l2t);
556 }
557 
558 static void send_mpa_req(struct c4iw_ep *ep, struct sk_buff *skb,
559 		u8 mpa_rev_to_use)
560 {
561 	int mpalen, wrlen;
562 	struct fw_ofld_tx_data_wr *req;
563 	struct mpa_message *mpa;
564 	struct mpa_v2_conn_params mpa_v2_params;
565 
566 	PDBG("%s ep %p tid %u pd_len %d\n", __func__, ep, ep->hwtid, ep->plen);
567 
568 	BUG_ON(skb_cloned(skb));
569 
570 	mpalen = sizeof(*mpa) + ep->plen;
571 	if (mpa_rev_to_use == 2)
572 		mpalen += sizeof(struct mpa_v2_conn_params);
573 	wrlen = roundup(mpalen + sizeof *req, 16);
574 	skb = get_skb(skb, wrlen, GFP_KERNEL);
575 	if (!skb) {
576 		connect_reply_upcall(ep, -ENOMEM);
577 		return;
578 	}
579 	set_wr_txq(skb, CPL_PRIORITY_DATA, ep->txq_idx);
580 
581 	req = (struct fw_ofld_tx_data_wr *)skb_put(skb, wrlen);
582 	memset(req, 0, wrlen);
583 	req->op_to_immdlen = cpu_to_be32(
584 		FW_WR_OP(FW_OFLD_TX_DATA_WR) |
585 		FW_WR_COMPL(1) |
586 		FW_WR_IMMDLEN(mpalen));
587 	req->flowid_len16 = cpu_to_be32(
588 		FW_WR_FLOWID(ep->hwtid) |
589 		FW_WR_LEN16(wrlen >> 4));
590 	req->plen = cpu_to_be32(mpalen);
591 	req->tunnel_to_proxy = cpu_to_be32(
592 		FW_OFLD_TX_DATA_WR_FLUSH(1) |
593 		FW_OFLD_TX_DATA_WR_SHOVE(1));
594 
595 	mpa = (struct mpa_message *)(req + 1);
596 	memcpy(mpa->key, MPA_KEY_REQ, sizeof(mpa->key));
597 	mpa->flags = (crc_enabled ? MPA_CRC : 0) |
598 		     (markers_enabled ? MPA_MARKERS : 0) |
599 		     (mpa_rev_to_use == 2 ? MPA_ENHANCED_RDMA_CONN : 0);
600 	mpa->private_data_size = htons(ep->plen);
601 	mpa->revision = mpa_rev_to_use;
602 	if (mpa_rev_to_use == 1) {
603 		ep->tried_with_mpa_v1 = 1;
604 		ep->retry_with_mpa_v1 = 0;
605 	}
606 
607 	if (mpa_rev_to_use == 2) {
608 		mpa->private_data_size = htons(ntohs(mpa->private_data_size) +
609 					       sizeof (struct mpa_v2_conn_params));
610 		mpa_v2_params.ird = htons((u16)ep->ird);
611 		mpa_v2_params.ord = htons((u16)ep->ord);
612 
613 		if (peer2peer) {
614 			mpa_v2_params.ird |= htons(MPA_V2_PEER2PEER_MODEL);
615 			if (p2p_type == FW_RI_INIT_P2PTYPE_RDMA_WRITE)
616 				mpa_v2_params.ord |=
617 					htons(MPA_V2_RDMA_WRITE_RTR);
618 			else if (p2p_type == FW_RI_INIT_P2PTYPE_READ_REQ)
619 				mpa_v2_params.ord |=
620 					htons(MPA_V2_RDMA_READ_RTR);
621 		}
622 		memcpy(mpa->private_data, &mpa_v2_params,
623 		       sizeof(struct mpa_v2_conn_params));
624 
625 		if (ep->plen)
626 			memcpy(mpa->private_data +
627 			       sizeof(struct mpa_v2_conn_params),
628 			       ep->mpa_pkt + sizeof(*mpa), ep->plen);
629 	} else
630 		if (ep->plen)
631 			memcpy(mpa->private_data,
632 					ep->mpa_pkt + sizeof(*mpa), ep->plen);
633 
634 	/*
635 	 * Reference the mpa skb.  This ensures the data area
636 	 * will remain in memory until the hw acks the tx.
637 	 * Function fw4_ack() will deref it.
638 	 */
639 	skb_get(skb);
640 	t4_set_arp_err_handler(skb, NULL, arp_failure_discard);
641 	BUG_ON(ep->mpa_skb);
642 	ep->mpa_skb = skb;
643 	c4iw_l2t_send(&ep->com.dev->rdev, skb, ep->l2t);
644 	start_ep_timer(ep);
645 	state_set(&ep->com, MPA_REQ_SENT);
646 	ep->mpa_attr.initiator = 1;
647 	return;
648 }
649 
650 static int send_mpa_reject(struct c4iw_ep *ep, const void *pdata, u8 plen)
651 {
652 	int mpalen, wrlen;
653 	struct fw_ofld_tx_data_wr *req;
654 	struct mpa_message *mpa;
655 	struct sk_buff *skb;
656 	struct mpa_v2_conn_params mpa_v2_params;
657 
658 	PDBG("%s ep %p tid %u pd_len %d\n", __func__, ep, ep->hwtid, ep->plen);
659 
660 	mpalen = sizeof(*mpa) + plen;
661 	if (ep->mpa_attr.version == 2 && ep->mpa_attr.enhanced_rdma_conn)
662 		mpalen += sizeof(struct mpa_v2_conn_params);
663 	wrlen = roundup(mpalen + sizeof *req, 16);
664 
665 	skb = get_skb(NULL, wrlen, GFP_KERNEL);
666 	if (!skb) {
667 		printk(KERN_ERR MOD "%s - cannot alloc skb!\n", __func__);
668 		return -ENOMEM;
669 	}
670 	set_wr_txq(skb, CPL_PRIORITY_DATA, ep->txq_idx);
671 
672 	req = (struct fw_ofld_tx_data_wr *)skb_put(skb, wrlen);
673 	memset(req, 0, wrlen);
674 	req->op_to_immdlen = cpu_to_be32(
675 		FW_WR_OP(FW_OFLD_TX_DATA_WR) |
676 		FW_WR_COMPL(1) |
677 		FW_WR_IMMDLEN(mpalen));
678 	req->flowid_len16 = cpu_to_be32(
679 		FW_WR_FLOWID(ep->hwtid) |
680 		FW_WR_LEN16(wrlen >> 4));
681 	req->plen = cpu_to_be32(mpalen);
682 	req->tunnel_to_proxy = cpu_to_be32(
683 		FW_OFLD_TX_DATA_WR_FLUSH(1) |
684 		FW_OFLD_TX_DATA_WR_SHOVE(1));
685 
686 	mpa = (struct mpa_message *)(req + 1);
687 	memset(mpa, 0, sizeof(*mpa));
688 	memcpy(mpa->key, MPA_KEY_REP, sizeof(mpa->key));
689 	mpa->flags = MPA_REJECT;
690 	mpa->revision = mpa_rev;
691 	mpa->private_data_size = htons(plen);
692 
693 	if (ep->mpa_attr.version == 2 && ep->mpa_attr.enhanced_rdma_conn) {
694 		mpa->flags |= MPA_ENHANCED_RDMA_CONN;
695 		mpa->private_data_size = htons(ntohs(mpa->private_data_size) +
696 					       sizeof (struct mpa_v2_conn_params));
697 		mpa_v2_params.ird = htons(((u16)ep->ird) |
698 					  (peer2peer ? MPA_V2_PEER2PEER_MODEL :
699 					   0));
700 		mpa_v2_params.ord = htons(((u16)ep->ord) | (peer2peer ?
701 					  (p2p_type ==
702 					   FW_RI_INIT_P2PTYPE_RDMA_WRITE ?
703 					   MPA_V2_RDMA_WRITE_RTR : p2p_type ==
704 					   FW_RI_INIT_P2PTYPE_READ_REQ ?
705 					   MPA_V2_RDMA_READ_RTR : 0) : 0));
706 		memcpy(mpa->private_data, &mpa_v2_params,
707 		       sizeof(struct mpa_v2_conn_params));
708 
709 		if (ep->plen)
710 			memcpy(mpa->private_data +
711 			       sizeof(struct mpa_v2_conn_params), pdata, plen);
712 	} else
713 		if (plen)
714 			memcpy(mpa->private_data, pdata, plen);
715 
716 	/*
717 	 * Reference the mpa skb again.  This ensures the data area
718 	 * will remain in memory until the hw acks the tx.
719 	 * Function fw4_ack() will deref it.
720 	 */
721 	skb_get(skb);
722 	set_wr_txq(skb, CPL_PRIORITY_DATA, ep->txq_idx);
723 	t4_set_arp_err_handler(skb, NULL, arp_failure_discard);
724 	BUG_ON(ep->mpa_skb);
725 	ep->mpa_skb = skb;
726 	return c4iw_l2t_send(&ep->com.dev->rdev, skb, ep->l2t);
727 }
728 
729 static int send_mpa_reply(struct c4iw_ep *ep, const void *pdata, u8 plen)
730 {
731 	int mpalen, wrlen;
732 	struct fw_ofld_tx_data_wr *req;
733 	struct mpa_message *mpa;
734 	struct sk_buff *skb;
735 	struct mpa_v2_conn_params mpa_v2_params;
736 
737 	PDBG("%s ep %p tid %u pd_len %d\n", __func__, ep, ep->hwtid, ep->plen);
738 
739 	mpalen = sizeof(*mpa) + plen;
740 	if (ep->mpa_attr.version == 2 && ep->mpa_attr.enhanced_rdma_conn)
741 		mpalen += sizeof(struct mpa_v2_conn_params);
742 	wrlen = roundup(mpalen + sizeof *req, 16);
743 
744 	skb = get_skb(NULL, wrlen, GFP_KERNEL);
745 	if (!skb) {
746 		printk(KERN_ERR MOD "%s - cannot alloc skb!\n", __func__);
747 		return -ENOMEM;
748 	}
749 	set_wr_txq(skb, CPL_PRIORITY_DATA, ep->txq_idx);
750 
751 	req = (struct fw_ofld_tx_data_wr *) skb_put(skb, wrlen);
752 	memset(req, 0, wrlen);
753 	req->op_to_immdlen = cpu_to_be32(
754 		FW_WR_OP(FW_OFLD_TX_DATA_WR) |
755 		FW_WR_COMPL(1) |
756 		FW_WR_IMMDLEN(mpalen));
757 	req->flowid_len16 = cpu_to_be32(
758 		FW_WR_FLOWID(ep->hwtid) |
759 		FW_WR_LEN16(wrlen >> 4));
760 	req->plen = cpu_to_be32(mpalen);
761 	req->tunnel_to_proxy = cpu_to_be32(
762 		FW_OFLD_TX_DATA_WR_FLUSH(1) |
763 		FW_OFLD_TX_DATA_WR_SHOVE(1));
764 
765 	mpa = (struct mpa_message *)(req + 1);
766 	memset(mpa, 0, sizeof(*mpa));
767 	memcpy(mpa->key, MPA_KEY_REP, sizeof(mpa->key));
768 	mpa->flags = (ep->mpa_attr.crc_enabled ? MPA_CRC : 0) |
769 		     (markers_enabled ? MPA_MARKERS : 0);
770 	mpa->revision = ep->mpa_attr.version;
771 	mpa->private_data_size = htons(plen);
772 
773 	if (ep->mpa_attr.version == 2 && ep->mpa_attr.enhanced_rdma_conn) {
774 		mpa->flags |= MPA_ENHANCED_RDMA_CONN;
775 		mpa->private_data_size = htons(ntohs(mpa->private_data_size) +
776 					       sizeof (struct mpa_v2_conn_params));
777 		mpa_v2_params.ird = htons((u16)ep->ird);
778 		mpa_v2_params.ord = htons((u16)ep->ord);
779 		if (peer2peer && (ep->mpa_attr.p2p_type !=
780 					FW_RI_INIT_P2PTYPE_DISABLED)) {
781 			mpa_v2_params.ird |= htons(MPA_V2_PEER2PEER_MODEL);
782 
783 			if (p2p_type == FW_RI_INIT_P2PTYPE_RDMA_WRITE)
784 				mpa_v2_params.ord |=
785 					htons(MPA_V2_RDMA_WRITE_RTR);
786 			else if (p2p_type == FW_RI_INIT_P2PTYPE_READ_REQ)
787 				mpa_v2_params.ord |=
788 					htons(MPA_V2_RDMA_READ_RTR);
789 		}
790 
791 		memcpy(mpa->private_data, &mpa_v2_params,
792 		       sizeof(struct mpa_v2_conn_params));
793 
794 		if (ep->plen)
795 			memcpy(mpa->private_data +
796 			       sizeof(struct mpa_v2_conn_params), pdata, plen);
797 	} else
798 		if (plen)
799 			memcpy(mpa->private_data, pdata, plen);
800 
801 	/*
802 	 * Reference the mpa skb.  This ensures the data area
803 	 * will remain in memory until the hw acks the tx.
804 	 * Function fw4_ack() will deref it.
805 	 */
806 	skb_get(skb);
807 	t4_set_arp_err_handler(skb, NULL, arp_failure_discard);
808 	ep->mpa_skb = skb;
809 	state_set(&ep->com, MPA_REP_SENT);
810 	return c4iw_l2t_send(&ep->com.dev->rdev, skb, ep->l2t);
811 }
812 
813 static int act_establish(struct c4iw_dev *dev, struct sk_buff *skb)
814 {
815 	struct c4iw_ep *ep;
816 	struct cpl_act_establish *req = cplhdr(skb);
817 	unsigned int tid = GET_TID(req);
818 	unsigned int atid = GET_TID_TID(ntohl(req->tos_atid));
819 	struct tid_info *t = dev->rdev.lldi.tids;
820 
821 	ep = lookup_atid(t, atid);
822 
823 	PDBG("%s ep %p tid %u snd_isn %u rcv_isn %u\n", __func__, ep, tid,
824 	     be32_to_cpu(req->snd_isn), be32_to_cpu(req->rcv_isn));
825 
826 	dst_confirm(ep->dst);
827 
828 	/* setup the hwtid for this connection */
829 	ep->hwtid = tid;
830 	cxgb4_insert_tid(t, ep, tid);
831 	insert_handle(dev, &dev->hwtid_idr, ep, ep->hwtid);
832 
833 	ep->snd_seq = be32_to_cpu(req->snd_isn);
834 	ep->rcv_seq = be32_to_cpu(req->rcv_isn);
835 
836 	set_emss(ep, ntohs(req->tcp_opt));
837 
838 	/* dealloc the atid */
839 	remove_handle(ep->com.dev, &ep->com.dev->atid_idr, atid);
840 	cxgb4_free_atid(t, atid);
841 	set_bit(ACT_ESTAB, &ep->com.history);
842 
843 	/* start MPA negotiation */
844 	send_flowc(ep, NULL);
845 	if (ep->retry_with_mpa_v1)
846 		send_mpa_req(ep, skb, 1);
847 	else
848 		send_mpa_req(ep, skb, mpa_rev);
849 
850 	return 0;
851 }
852 
853 static void close_complete_upcall(struct c4iw_ep *ep)
854 {
855 	struct iw_cm_event event;
856 
857 	PDBG("%s ep %p tid %u\n", __func__, ep, ep->hwtid);
858 	memset(&event, 0, sizeof(event));
859 	event.event = IW_CM_EVENT_CLOSE;
860 	if (ep->com.cm_id) {
861 		PDBG("close complete delivered ep %p cm_id %p tid %u\n",
862 		     ep, ep->com.cm_id, ep->hwtid);
863 		ep->com.cm_id->event_handler(ep->com.cm_id, &event);
864 		ep->com.cm_id->rem_ref(ep->com.cm_id);
865 		ep->com.cm_id = NULL;
866 		ep->com.qp = NULL;
867 		set_bit(CLOSE_UPCALL, &ep->com.history);
868 	}
869 }
870 
871 static int abort_connection(struct c4iw_ep *ep, struct sk_buff *skb, gfp_t gfp)
872 {
873 	PDBG("%s ep %p tid %u\n", __func__, ep, ep->hwtid);
874 	close_complete_upcall(ep);
875 	state_set(&ep->com, ABORTING);
876 	set_bit(ABORT_CONN, &ep->com.history);
877 	return send_abort(ep, skb, gfp);
878 }
879 
880 static void peer_close_upcall(struct c4iw_ep *ep)
881 {
882 	struct iw_cm_event event;
883 
884 	PDBG("%s ep %p tid %u\n", __func__, ep, ep->hwtid);
885 	memset(&event, 0, sizeof(event));
886 	event.event = IW_CM_EVENT_DISCONNECT;
887 	if (ep->com.cm_id) {
888 		PDBG("peer close delivered ep %p cm_id %p tid %u\n",
889 		     ep, ep->com.cm_id, ep->hwtid);
890 		ep->com.cm_id->event_handler(ep->com.cm_id, &event);
891 		set_bit(DISCONN_UPCALL, &ep->com.history);
892 	}
893 }
894 
895 static void peer_abort_upcall(struct c4iw_ep *ep)
896 {
897 	struct iw_cm_event event;
898 
899 	PDBG("%s ep %p tid %u\n", __func__, ep, ep->hwtid);
900 	memset(&event, 0, sizeof(event));
901 	event.event = IW_CM_EVENT_CLOSE;
902 	event.status = -ECONNRESET;
903 	if (ep->com.cm_id) {
904 		PDBG("abort delivered ep %p cm_id %p tid %u\n", ep,
905 		     ep->com.cm_id, ep->hwtid);
906 		ep->com.cm_id->event_handler(ep->com.cm_id, &event);
907 		ep->com.cm_id->rem_ref(ep->com.cm_id);
908 		ep->com.cm_id = NULL;
909 		ep->com.qp = NULL;
910 		set_bit(ABORT_UPCALL, &ep->com.history);
911 	}
912 }
913 
914 static void connect_reply_upcall(struct c4iw_ep *ep, int status)
915 {
916 	struct iw_cm_event event;
917 
918 	PDBG("%s ep %p tid %u status %d\n", __func__, ep, ep->hwtid, status);
919 	memset(&event, 0, sizeof(event));
920 	event.event = IW_CM_EVENT_CONNECT_REPLY;
921 	event.status = status;
922 	event.local_addr = ep->com.local_addr;
923 	event.remote_addr = ep->com.remote_addr;
924 
925 	if ((status == 0) || (status == -ECONNREFUSED)) {
926 		if (!ep->tried_with_mpa_v1) {
927 			/* this means MPA_v2 is used */
928 			event.private_data_len = ep->plen -
929 				sizeof(struct mpa_v2_conn_params);
930 			event.private_data = ep->mpa_pkt +
931 				sizeof(struct mpa_message) +
932 				sizeof(struct mpa_v2_conn_params);
933 		} else {
934 			/* this means MPA_v1 is used */
935 			event.private_data_len = ep->plen;
936 			event.private_data = ep->mpa_pkt +
937 				sizeof(struct mpa_message);
938 		}
939 	}
940 
941 	PDBG("%s ep %p tid %u status %d\n", __func__, ep,
942 	     ep->hwtid, status);
943 	set_bit(CONN_RPL_UPCALL, &ep->com.history);
944 	ep->com.cm_id->event_handler(ep->com.cm_id, &event);
945 
946 	if (status < 0) {
947 		ep->com.cm_id->rem_ref(ep->com.cm_id);
948 		ep->com.cm_id = NULL;
949 		ep->com.qp = NULL;
950 	}
951 }
952 
953 static void connect_request_upcall(struct c4iw_ep *ep)
954 {
955 	struct iw_cm_event event;
956 
957 	PDBG("%s ep %p tid %u\n", __func__, ep, ep->hwtid);
958 	memset(&event, 0, sizeof(event));
959 	event.event = IW_CM_EVENT_CONNECT_REQUEST;
960 	event.local_addr = ep->com.local_addr;
961 	event.remote_addr = ep->com.remote_addr;
962 	event.provider_data = ep;
963 	if (!ep->tried_with_mpa_v1) {
964 		/* this means MPA_v2 is used */
965 		event.ord = ep->ord;
966 		event.ird = ep->ird;
967 		event.private_data_len = ep->plen -
968 			sizeof(struct mpa_v2_conn_params);
969 		event.private_data = ep->mpa_pkt + sizeof(struct mpa_message) +
970 			sizeof(struct mpa_v2_conn_params);
971 	} else {
972 		/* this means MPA_v1 is used. Send max supported */
973 		event.ord = c4iw_max_read_depth;
974 		event.ird = c4iw_max_read_depth;
975 		event.private_data_len = ep->plen;
976 		event.private_data = ep->mpa_pkt + sizeof(struct mpa_message);
977 	}
978 	if (state_read(&ep->parent_ep->com) != DEAD) {
979 		c4iw_get_ep(&ep->com);
980 		ep->parent_ep->com.cm_id->event_handler(
981 						ep->parent_ep->com.cm_id,
982 						&event);
983 	}
984 	set_bit(CONNREQ_UPCALL, &ep->com.history);
985 	c4iw_put_ep(&ep->parent_ep->com);
986 	ep->parent_ep = NULL;
987 }
988 
989 static void established_upcall(struct c4iw_ep *ep)
990 {
991 	struct iw_cm_event event;
992 
993 	PDBG("%s ep %p tid %u\n", __func__, ep, ep->hwtid);
994 	memset(&event, 0, sizeof(event));
995 	event.event = IW_CM_EVENT_ESTABLISHED;
996 	event.ird = ep->ird;
997 	event.ord = ep->ord;
998 	if (ep->com.cm_id) {
999 		PDBG("%s ep %p tid %u\n", __func__, ep, ep->hwtid);
1000 		ep->com.cm_id->event_handler(ep->com.cm_id, &event);
1001 		set_bit(ESTAB_UPCALL, &ep->com.history);
1002 	}
1003 }
1004 
1005 static int update_rx_credits(struct c4iw_ep *ep, u32 credits)
1006 {
1007 	struct cpl_rx_data_ack *req;
1008 	struct sk_buff *skb;
1009 	int wrlen = roundup(sizeof *req, 16);
1010 
1011 	PDBG("%s ep %p tid %u credits %u\n", __func__, ep, ep->hwtid, credits);
1012 	skb = get_skb(NULL, wrlen, GFP_KERNEL);
1013 	if (!skb) {
1014 		printk(KERN_ERR MOD "update_rx_credits - cannot alloc skb!\n");
1015 		return 0;
1016 	}
1017 
1018 	req = (struct cpl_rx_data_ack *) skb_put(skb, wrlen);
1019 	memset(req, 0, wrlen);
1020 	INIT_TP_WR(req, ep->hwtid);
1021 	OPCODE_TID(req) = cpu_to_be32(MK_OPCODE_TID(CPL_RX_DATA_ACK,
1022 						    ep->hwtid));
1023 	req->credit_dack = cpu_to_be32(credits | RX_FORCE_ACK(1) |
1024 				       F_RX_DACK_CHANGE |
1025 				       V_RX_DACK_MODE(dack_mode));
1026 	set_wr_txq(skb, CPL_PRIORITY_ACK, ep->ctrlq_idx);
1027 	c4iw_ofld_send(&ep->com.dev->rdev, skb);
1028 	return credits;
1029 }
1030 
1031 static void process_mpa_reply(struct c4iw_ep *ep, struct sk_buff *skb)
1032 {
1033 	struct mpa_message *mpa;
1034 	struct mpa_v2_conn_params *mpa_v2_params;
1035 	u16 plen;
1036 	u16 resp_ird, resp_ord;
1037 	u8 rtr_mismatch = 0, insuff_ird = 0;
1038 	struct c4iw_qp_attributes attrs;
1039 	enum c4iw_qp_attr_mask mask;
1040 	int err;
1041 
1042 	PDBG("%s ep %p tid %u\n", __func__, ep, ep->hwtid);
1043 
1044 	/*
1045 	 * Stop mpa timer.  If it expired, then the state has
1046 	 * changed and we bail since ep_timeout already aborted
1047 	 * the connection.
1048 	 */
1049 	stop_ep_timer(ep);
1050 	if (state_read(&ep->com) != MPA_REQ_SENT)
1051 		return;
1052 
1053 	/*
1054 	 * If we get more than the supported amount of private data
1055 	 * then we must fail this connection.
1056 	 */
1057 	if (ep->mpa_pkt_len + skb->len > sizeof(ep->mpa_pkt)) {
1058 		err = -EINVAL;
1059 		goto err;
1060 	}
1061 
1062 	/*
1063 	 * copy the new data into our accumulation buffer.
1064 	 */
1065 	skb_copy_from_linear_data(skb, &(ep->mpa_pkt[ep->mpa_pkt_len]),
1066 				  skb->len);
1067 	ep->mpa_pkt_len += skb->len;
1068 
1069 	/*
1070 	 * if we don't even have the mpa message, then bail.
1071 	 */
1072 	if (ep->mpa_pkt_len < sizeof(*mpa))
1073 		return;
1074 	mpa = (struct mpa_message *) ep->mpa_pkt;
1075 
1076 	/* Validate MPA header. */
1077 	if (mpa->revision > mpa_rev) {
1078 		printk(KERN_ERR MOD "%s MPA version mismatch. Local = %d,"
1079 		       " Received = %d\n", __func__, mpa_rev, mpa->revision);
1080 		err = -EPROTO;
1081 		goto err;
1082 	}
1083 	if (memcmp(mpa->key, MPA_KEY_REP, sizeof(mpa->key))) {
1084 		err = -EPROTO;
1085 		goto err;
1086 	}
1087 
1088 	plen = ntohs(mpa->private_data_size);
1089 
1090 	/*
1091 	 * Fail if there's too much private data.
1092 	 */
1093 	if (plen > MPA_MAX_PRIVATE_DATA) {
1094 		err = -EPROTO;
1095 		goto err;
1096 	}
1097 
1098 	/*
1099 	 * If plen does not account for pkt size
1100 	 */
1101 	if (ep->mpa_pkt_len > (sizeof(*mpa) + plen)) {
1102 		err = -EPROTO;
1103 		goto err;
1104 	}
1105 
1106 	ep->plen = (u8) plen;
1107 
1108 	/*
1109 	 * If we don't have all the pdata yet, then bail.
1110 	 * We'll continue process when more data arrives.
1111 	 */
1112 	if (ep->mpa_pkt_len < (sizeof(*mpa) + plen))
1113 		return;
1114 
1115 	if (mpa->flags & MPA_REJECT) {
1116 		err = -ECONNREFUSED;
1117 		goto err;
1118 	}
1119 
1120 	/*
1121 	 * If we get here we have accumulated the entire mpa
1122 	 * start reply message including private data. And
1123 	 * the MPA header is valid.
1124 	 */
1125 	state_set(&ep->com, FPDU_MODE);
1126 	ep->mpa_attr.crc_enabled = (mpa->flags & MPA_CRC) | crc_enabled ? 1 : 0;
1127 	ep->mpa_attr.recv_marker_enabled = markers_enabled;
1128 	ep->mpa_attr.xmit_marker_enabled = mpa->flags & MPA_MARKERS ? 1 : 0;
1129 	ep->mpa_attr.version = mpa->revision;
1130 	ep->mpa_attr.p2p_type = FW_RI_INIT_P2PTYPE_DISABLED;
1131 
1132 	if (mpa->revision == 2) {
1133 		ep->mpa_attr.enhanced_rdma_conn =
1134 			mpa->flags & MPA_ENHANCED_RDMA_CONN ? 1 : 0;
1135 		if (ep->mpa_attr.enhanced_rdma_conn) {
1136 			mpa_v2_params = (struct mpa_v2_conn_params *)
1137 				(ep->mpa_pkt + sizeof(*mpa));
1138 			resp_ird = ntohs(mpa_v2_params->ird) &
1139 				MPA_V2_IRD_ORD_MASK;
1140 			resp_ord = ntohs(mpa_v2_params->ord) &
1141 				MPA_V2_IRD_ORD_MASK;
1142 
1143 			/*
1144 			 * This is a double-check. Ideally, below checks are
1145 			 * not required since ird/ord stuff has been taken
1146 			 * care of in c4iw_accept_cr
1147 			 */
1148 			if ((ep->ird < resp_ord) || (ep->ord > resp_ird)) {
1149 				err = -ENOMEM;
1150 				ep->ird = resp_ord;
1151 				ep->ord = resp_ird;
1152 				insuff_ird = 1;
1153 			}
1154 
1155 			if (ntohs(mpa_v2_params->ird) &
1156 					MPA_V2_PEER2PEER_MODEL) {
1157 				if (ntohs(mpa_v2_params->ord) &
1158 						MPA_V2_RDMA_WRITE_RTR)
1159 					ep->mpa_attr.p2p_type =
1160 						FW_RI_INIT_P2PTYPE_RDMA_WRITE;
1161 				else if (ntohs(mpa_v2_params->ord) &
1162 						MPA_V2_RDMA_READ_RTR)
1163 					ep->mpa_attr.p2p_type =
1164 						FW_RI_INIT_P2PTYPE_READ_REQ;
1165 			}
1166 		}
1167 	} else if (mpa->revision == 1)
1168 		if (peer2peer)
1169 			ep->mpa_attr.p2p_type = p2p_type;
1170 
1171 	PDBG("%s - crc_enabled=%d, recv_marker_enabled=%d, "
1172 	     "xmit_marker_enabled=%d, version=%d p2p_type=%d local-p2p_type = "
1173 	     "%d\n", __func__, ep->mpa_attr.crc_enabled,
1174 	     ep->mpa_attr.recv_marker_enabled,
1175 	     ep->mpa_attr.xmit_marker_enabled, ep->mpa_attr.version,
1176 	     ep->mpa_attr.p2p_type, p2p_type);
1177 
1178 	/*
1179 	 * If responder's RTR does not match with that of initiator, assign
1180 	 * FW_RI_INIT_P2PTYPE_DISABLED in mpa attributes so that RTR is not
1181 	 * generated when moving QP to RTS state.
1182 	 * A TERM message will be sent after QP has moved to RTS state
1183 	 */
1184 	if ((ep->mpa_attr.version == 2) && peer2peer &&
1185 			(ep->mpa_attr.p2p_type != p2p_type)) {
1186 		ep->mpa_attr.p2p_type = FW_RI_INIT_P2PTYPE_DISABLED;
1187 		rtr_mismatch = 1;
1188 	}
1189 
1190 	attrs.mpa_attr = ep->mpa_attr;
1191 	attrs.max_ird = ep->ird;
1192 	attrs.max_ord = ep->ord;
1193 	attrs.llp_stream_handle = ep;
1194 	attrs.next_state = C4IW_QP_STATE_RTS;
1195 
1196 	mask = C4IW_QP_ATTR_NEXT_STATE |
1197 	    C4IW_QP_ATTR_LLP_STREAM_HANDLE | C4IW_QP_ATTR_MPA_ATTR |
1198 	    C4IW_QP_ATTR_MAX_IRD | C4IW_QP_ATTR_MAX_ORD;
1199 
1200 	/* bind QP and TID with INIT_WR */
1201 	err = c4iw_modify_qp(ep->com.qp->rhp,
1202 			     ep->com.qp, mask, &attrs, 1);
1203 	if (err)
1204 		goto err;
1205 
1206 	/*
1207 	 * If responder's RTR requirement did not match with what initiator
1208 	 * supports, generate TERM message
1209 	 */
1210 	if (rtr_mismatch) {
1211 		printk(KERN_ERR "%s: RTR mismatch, sending TERM\n", __func__);
1212 		attrs.layer_etype = LAYER_MPA | DDP_LLP;
1213 		attrs.ecode = MPA_NOMATCH_RTR;
1214 		attrs.next_state = C4IW_QP_STATE_TERMINATE;
1215 		err = c4iw_modify_qp(ep->com.qp->rhp, ep->com.qp,
1216 				C4IW_QP_ATTR_NEXT_STATE, &attrs, 0);
1217 		err = -ENOMEM;
1218 		goto out;
1219 	}
1220 
1221 	/*
1222 	 * Generate TERM if initiator IRD is not sufficient for responder
1223 	 * provided ORD. Currently, we do the same behaviour even when
1224 	 * responder provided IRD is also not sufficient as regards to
1225 	 * initiator ORD.
1226 	 */
1227 	if (insuff_ird) {
1228 		printk(KERN_ERR "%s: Insufficient IRD, sending TERM\n",
1229 				__func__);
1230 		attrs.layer_etype = LAYER_MPA | DDP_LLP;
1231 		attrs.ecode = MPA_INSUFF_IRD;
1232 		attrs.next_state = C4IW_QP_STATE_TERMINATE;
1233 		err = c4iw_modify_qp(ep->com.qp->rhp, ep->com.qp,
1234 				C4IW_QP_ATTR_NEXT_STATE, &attrs, 0);
1235 		err = -ENOMEM;
1236 		goto out;
1237 	}
1238 	goto out;
1239 err:
1240 	state_set(&ep->com, ABORTING);
1241 	send_abort(ep, skb, GFP_KERNEL);
1242 out:
1243 	connect_reply_upcall(ep, err);
1244 	return;
1245 }
1246 
1247 static void process_mpa_request(struct c4iw_ep *ep, struct sk_buff *skb)
1248 {
1249 	struct mpa_message *mpa;
1250 	struct mpa_v2_conn_params *mpa_v2_params;
1251 	u16 plen;
1252 
1253 	PDBG("%s ep %p tid %u\n", __func__, ep, ep->hwtid);
1254 
1255 	if (state_read(&ep->com) != MPA_REQ_WAIT)
1256 		return;
1257 
1258 	/*
1259 	 * If we get more than the supported amount of private data
1260 	 * then we must fail this connection.
1261 	 */
1262 	if (ep->mpa_pkt_len + skb->len > sizeof(ep->mpa_pkt)) {
1263 		stop_ep_timer(ep);
1264 		abort_connection(ep, skb, GFP_KERNEL);
1265 		return;
1266 	}
1267 
1268 	PDBG("%s enter (%s line %u)\n", __func__, __FILE__, __LINE__);
1269 
1270 	/*
1271 	 * Copy the new data into our accumulation buffer.
1272 	 */
1273 	skb_copy_from_linear_data(skb, &(ep->mpa_pkt[ep->mpa_pkt_len]),
1274 				  skb->len);
1275 	ep->mpa_pkt_len += skb->len;
1276 
1277 	/*
1278 	 * If we don't even have the mpa message, then bail.
1279 	 * We'll continue process when more data arrives.
1280 	 */
1281 	if (ep->mpa_pkt_len < sizeof(*mpa))
1282 		return;
1283 
1284 	PDBG("%s enter (%s line %u)\n", __func__, __FILE__, __LINE__);
1285 	stop_ep_timer(ep);
1286 	mpa = (struct mpa_message *) ep->mpa_pkt;
1287 
1288 	/*
1289 	 * Validate MPA Header.
1290 	 */
1291 	if (mpa->revision > mpa_rev) {
1292 		printk(KERN_ERR MOD "%s MPA version mismatch. Local = %d,"
1293 		       " Received = %d\n", __func__, mpa_rev, mpa->revision);
1294 		abort_connection(ep, skb, GFP_KERNEL);
1295 		return;
1296 	}
1297 
1298 	if (memcmp(mpa->key, MPA_KEY_REQ, sizeof(mpa->key))) {
1299 		abort_connection(ep, skb, GFP_KERNEL);
1300 		return;
1301 	}
1302 
1303 	plen = ntohs(mpa->private_data_size);
1304 
1305 	/*
1306 	 * Fail if there's too much private data.
1307 	 */
1308 	if (plen > MPA_MAX_PRIVATE_DATA) {
1309 		abort_connection(ep, skb, GFP_KERNEL);
1310 		return;
1311 	}
1312 
1313 	/*
1314 	 * If plen does not account for pkt size
1315 	 */
1316 	if (ep->mpa_pkt_len > (sizeof(*mpa) + plen)) {
1317 		abort_connection(ep, skb, GFP_KERNEL);
1318 		return;
1319 	}
1320 	ep->plen = (u8) plen;
1321 
1322 	/*
1323 	 * If we don't have all the pdata yet, then bail.
1324 	 */
1325 	if (ep->mpa_pkt_len < (sizeof(*mpa) + plen))
1326 		return;
1327 
1328 	/*
1329 	 * If we get here we have accumulated the entire mpa
1330 	 * start reply message including private data.
1331 	 */
1332 	ep->mpa_attr.initiator = 0;
1333 	ep->mpa_attr.crc_enabled = (mpa->flags & MPA_CRC) | crc_enabled ? 1 : 0;
1334 	ep->mpa_attr.recv_marker_enabled = markers_enabled;
1335 	ep->mpa_attr.xmit_marker_enabled = mpa->flags & MPA_MARKERS ? 1 : 0;
1336 	ep->mpa_attr.version = mpa->revision;
1337 	if (mpa->revision == 1)
1338 		ep->tried_with_mpa_v1 = 1;
1339 	ep->mpa_attr.p2p_type = FW_RI_INIT_P2PTYPE_DISABLED;
1340 
1341 	if (mpa->revision == 2) {
1342 		ep->mpa_attr.enhanced_rdma_conn =
1343 			mpa->flags & MPA_ENHANCED_RDMA_CONN ? 1 : 0;
1344 		if (ep->mpa_attr.enhanced_rdma_conn) {
1345 			mpa_v2_params = (struct mpa_v2_conn_params *)
1346 				(ep->mpa_pkt + sizeof(*mpa));
1347 			ep->ird = ntohs(mpa_v2_params->ird) &
1348 				MPA_V2_IRD_ORD_MASK;
1349 			ep->ord = ntohs(mpa_v2_params->ord) &
1350 				MPA_V2_IRD_ORD_MASK;
1351 			if (ntohs(mpa_v2_params->ird) & MPA_V2_PEER2PEER_MODEL)
1352 				if (peer2peer) {
1353 					if (ntohs(mpa_v2_params->ord) &
1354 							MPA_V2_RDMA_WRITE_RTR)
1355 						ep->mpa_attr.p2p_type =
1356 						FW_RI_INIT_P2PTYPE_RDMA_WRITE;
1357 					else if (ntohs(mpa_v2_params->ord) &
1358 							MPA_V2_RDMA_READ_RTR)
1359 						ep->mpa_attr.p2p_type =
1360 						FW_RI_INIT_P2PTYPE_READ_REQ;
1361 				}
1362 		}
1363 	} else if (mpa->revision == 1)
1364 		if (peer2peer)
1365 			ep->mpa_attr.p2p_type = p2p_type;
1366 
1367 	PDBG("%s - crc_enabled=%d, recv_marker_enabled=%d, "
1368 	     "xmit_marker_enabled=%d, version=%d p2p_type=%d\n", __func__,
1369 	     ep->mpa_attr.crc_enabled, ep->mpa_attr.recv_marker_enabled,
1370 	     ep->mpa_attr.xmit_marker_enabled, ep->mpa_attr.version,
1371 	     ep->mpa_attr.p2p_type);
1372 
1373 	state_set(&ep->com, MPA_REQ_RCVD);
1374 
1375 	/* drive upcall */
1376 	connect_request_upcall(ep);
1377 	return;
1378 }
1379 
1380 static int rx_data(struct c4iw_dev *dev, struct sk_buff *skb)
1381 {
1382 	struct c4iw_ep *ep;
1383 	struct cpl_rx_data *hdr = cplhdr(skb);
1384 	unsigned int dlen = ntohs(hdr->len);
1385 	unsigned int tid = GET_TID(hdr);
1386 	struct tid_info *t = dev->rdev.lldi.tids;
1387 	__u8 status = hdr->status;
1388 
1389 	ep = lookup_tid(t, tid);
1390 	PDBG("%s ep %p tid %u dlen %u\n", __func__, ep, ep->hwtid, dlen);
1391 	skb_pull(skb, sizeof(*hdr));
1392 	skb_trim(skb, dlen);
1393 
1394 	ep->rcv_seq += dlen;
1395 	BUG_ON(ep->rcv_seq != (ntohl(hdr->seq) + dlen));
1396 
1397 	/* update RX credits */
1398 	update_rx_credits(ep, dlen);
1399 
1400 	switch (state_read(&ep->com)) {
1401 	case MPA_REQ_SENT:
1402 		process_mpa_reply(ep, skb);
1403 		break;
1404 	case MPA_REQ_WAIT:
1405 		process_mpa_request(ep, skb);
1406 		break;
1407 	case MPA_REP_SENT:
1408 		break;
1409 	default:
1410 		pr_err("%s Unexpected streaming data." \
1411 		       " ep %p state %d tid %u status %d\n",
1412 		       __func__, ep, state_read(&ep->com), ep->hwtid, status);
1413 
1414 		/*
1415 		 * The ep will timeout and inform the ULP of the failure.
1416 		 * See ep_timeout().
1417 		 */
1418 		break;
1419 	}
1420 	return 0;
1421 }
1422 
1423 static int abort_rpl(struct c4iw_dev *dev, struct sk_buff *skb)
1424 {
1425 	struct c4iw_ep *ep;
1426 	struct cpl_abort_rpl_rss *rpl = cplhdr(skb);
1427 	int release = 0;
1428 	unsigned int tid = GET_TID(rpl);
1429 	struct tid_info *t = dev->rdev.lldi.tids;
1430 
1431 	ep = lookup_tid(t, tid);
1432 	if (!ep) {
1433 		printk(KERN_WARNING MOD "Abort rpl to freed endpoint\n");
1434 		return 0;
1435 	}
1436 	PDBG("%s ep %p tid %u\n", __func__, ep, ep->hwtid);
1437 	mutex_lock(&ep->com.mutex);
1438 	switch (ep->com.state) {
1439 	case ABORTING:
1440 		__state_set(&ep->com, DEAD);
1441 		release = 1;
1442 		break;
1443 	default:
1444 		printk(KERN_ERR "%s ep %p state %d\n",
1445 		     __func__, ep, ep->com.state);
1446 		break;
1447 	}
1448 	mutex_unlock(&ep->com.mutex);
1449 
1450 	if (release)
1451 		release_ep_resources(ep);
1452 	return 0;
1453 }
1454 
1455 static void send_fw_act_open_req(struct c4iw_ep *ep, unsigned int atid)
1456 {
1457 	struct sk_buff *skb;
1458 	struct fw_ofld_connection_wr *req;
1459 	unsigned int mtu_idx;
1460 	int wscale;
1461 
1462 	skb = get_skb(NULL, sizeof(*req), GFP_KERNEL);
1463 	req = (struct fw_ofld_connection_wr *)__skb_put(skb, sizeof(*req));
1464 	memset(req, 0, sizeof(*req));
1465 	req->op_compl = htonl(V_WR_OP(FW_OFLD_CONNECTION_WR));
1466 	req->len16_pkd = htonl(FW_WR_LEN16(DIV_ROUND_UP(sizeof(*req), 16)));
1467 	req->le.filter = cpu_to_be32(select_ntuple(ep->com.dev, ep->dst,
1468 				     ep->l2t));
1469 	req->le.lport = ep->com.local_addr.sin_port;
1470 	req->le.pport = ep->com.remote_addr.sin_port;
1471 	req->le.u.ipv4.lip = ep->com.local_addr.sin_addr.s_addr;
1472 	req->le.u.ipv4.pip = ep->com.remote_addr.sin_addr.s_addr;
1473 	req->tcb.t_state_to_astid =
1474 			htonl(V_FW_OFLD_CONNECTION_WR_T_STATE(TCP_SYN_SENT) |
1475 			V_FW_OFLD_CONNECTION_WR_ASTID(atid));
1476 	req->tcb.cplrxdataack_cplpassacceptrpl =
1477 			htons(F_FW_OFLD_CONNECTION_WR_CPLRXDATAACK);
1478 	req->tcb.tx_max = jiffies;
1479 	req->tcb.rcv_adv = htons(1);
1480 	cxgb4_best_mtu(ep->com.dev->rdev.lldi.mtus, ep->mtu, &mtu_idx);
1481 	wscale = compute_wscale(rcv_win);
1482 	req->tcb.opt0 = TCAM_BYPASS(1) |
1483 		(nocong ? NO_CONG(1) : 0) |
1484 		KEEP_ALIVE(1) |
1485 		DELACK(1) |
1486 		WND_SCALE(wscale) |
1487 		MSS_IDX(mtu_idx) |
1488 		L2T_IDX(ep->l2t->idx) |
1489 		TX_CHAN(ep->tx_chan) |
1490 		SMAC_SEL(ep->smac_idx) |
1491 		DSCP(ep->tos) |
1492 		ULP_MODE(ULP_MODE_TCPDDP) |
1493 		RCV_BUFSIZ(rcv_win >> 10);
1494 	req->tcb.opt2 = PACE(1) |
1495 		TX_QUEUE(ep->com.dev->rdev.lldi.tx_modq[ep->tx_chan]) |
1496 		RX_CHANNEL(0) |
1497 		CCTRL_ECN(enable_ecn) |
1498 		RSS_QUEUE_VALID | RSS_QUEUE(ep->rss_qid);
1499 	if (enable_tcp_timestamps)
1500 		req->tcb.opt2 |= TSTAMPS_EN(1);
1501 	if (enable_tcp_sack)
1502 		req->tcb.opt2 |= SACK_EN(1);
1503 	if (wscale && enable_tcp_window_scaling)
1504 		req->tcb.opt2 |= WND_SCALE_EN(1);
1505 	req->tcb.opt0 = cpu_to_be64(req->tcb.opt0);
1506 	req->tcb.opt2 = cpu_to_be32(req->tcb.opt2);
1507 	set_wr_txq(skb, CPL_PRIORITY_CONTROL, ep->ctrlq_idx);
1508 	set_bit(ACT_OFLD_CONN, &ep->com.history);
1509 	c4iw_l2t_send(&ep->com.dev->rdev, skb, ep->l2t);
1510 }
1511 
1512 /*
1513  * Return whether a failed active open has allocated a TID
1514  */
1515 static inline int act_open_has_tid(int status)
1516 {
1517 	return status != CPL_ERR_TCAM_FULL && status != CPL_ERR_CONN_EXIST &&
1518 	       status != CPL_ERR_ARP_MISS;
1519 }
1520 
1521 #define ACT_OPEN_RETRY_COUNT 2
1522 
1523 static int c4iw_reconnect(struct c4iw_ep *ep)
1524 {
1525 	int err = 0;
1526 	struct rtable *rt;
1527 	struct port_info *pi;
1528 	struct net_device *pdev;
1529 	int step;
1530 	struct neighbour *neigh;
1531 
1532 	PDBG("%s qp %p cm_id %p\n", __func__, ep->com.qp, ep->com.cm_id);
1533 	init_timer(&ep->timer);
1534 
1535 	/*
1536 	 * Allocate an active TID to initiate a TCP connection.
1537 	 */
1538 	ep->atid = cxgb4_alloc_atid(ep->com.dev->rdev.lldi.tids, ep);
1539 	if (ep->atid == -1) {
1540 		pr_err("%s - cannot alloc atid.\n", __func__);
1541 		err = -ENOMEM;
1542 		goto fail2;
1543 	}
1544 	insert_handle(ep->com.dev, &ep->com.dev->atid_idr, ep, ep->atid);
1545 
1546 	/* find a route */
1547 	rt = find_route(ep->com.dev,
1548 			ep->com.cm_id->local_addr.sin_addr.s_addr,
1549 			ep->com.cm_id->remote_addr.sin_addr.s_addr,
1550 			ep->com.cm_id->local_addr.sin_port,
1551 			ep->com.cm_id->remote_addr.sin_port, 0);
1552 	if (!rt) {
1553 		pr_err("%s - cannot find route.\n", __func__);
1554 		err = -EHOSTUNREACH;
1555 		goto fail3;
1556 	}
1557 	ep->dst = &rt->dst;
1558 
1559 	neigh = dst_neigh_lookup(ep->dst,
1560 			&ep->com.cm_id->remote_addr.sin_addr.s_addr);
1561 	/* get a l2t entry */
1562 	if (neigh->dev->flags & IFF_LOOPBACK) {
1563 		PDBG("%s LOOPBACK\n", __func__);
1564 		pdev = ip_dev_find(&init_net,
1565 				ep->com.cm_id->remote_addr.sin_addr.s_addr);
1566 		ep->l2t = cxgb4_l2t_get(ep->com.dev->rdev.lldi.l2t,
1567 				neigh, pdev, 0);
1568 		pi = (struct port_info *)netdev_priv(pdev);
1569 		ep->mtu = pdev->mtu;
1570 		ep->tx_chan = cxgb4_port_chan(pdev);
1571 		ep->smac_idx = (cxgb4_port_viid(pdev) & 0x7F) << 1;
1572 		dev_put(pdev);
1573 	} else {
1574 		ep->l2t = cxgb4_l2t_get(ep->com.dev->rdev.lldi.l2t,
1575 				neigh, neigh->dev, 0);
1576 		pi = (struct port_info *)netdev_priv(neigh->dev);
1577 		ep->mtu = dst_mtu(ep->dst);
1578 		ep->tx_chan = cxgb4_port_chan(neigh->dev);
1579 		ep->smac_idx = (cxgb4_port_viid(neigh->dev) &
1580 				0x7F) << 1;
1581 	}
1582 
1583 	step = ep->com.dev->rdev.lldi.ntxq / ep->com.dev->rdev.lldi.nchan;
1584 	ep->txq_idx = pi->port_id * step;
1585 	ep->ctrlq_idx = pi->port_id;
1586 	step = ep->com.dev->rdev.lldi.nrxq / ep->com.dev->rdev.lldi.nchan;
1587 	ep->rss_qid = ep->com.dev->rdev.lldi.rxq_ids[pi->port_id * step];
1588 
1589 	if (!ep->l2t) {
1590 		pr_err("%s - cannot alloc l2e.\n", __func__);
1591 		err = -ENOMEM;
1592 		goto fail4;
1593 	}
1594 
1595 	PDBG("%s txq_idx %u tx_chan %u smac_idx %u rss_qid %u l2t_idx %u\n",
1596 	     __func__, ep->txq_idx, ep->tx_chan, ep->smac_idx, ep->rss_qid,
1597 	     ep->l2t->idx);
1598 
1599 	state_set(&ep->com, CONNECTING);
1600 	ep->tos = 0;
1601 
1602 	/* send connect request to rnic */
1603 	err = send_connect(ep);
1604 	if (!err)
1605 		goto out;
1606 
1607 	cxgb4_l2t_release(ep->l2t);
1608 fail4:
1609 	dst_release(ep->dst);
1610 fail3:
1611 	remove_handle(ep->com.dev, &ep->com.dev->atid_idr, ep->atid);
1612 	cxgb4_free_atid(ep->com.dev->rdev.lldi.tids, ep->atid);
1613 fail2:
1614 	/*
1615 	 * remember to send notification to upper layer.
1616 	 * We are in here so the upper layer is not aware that this is
1617 	 * re-connect attempt and so, upper layer is still waiting for
1618 	 * response of 1st connect request.
1619 	 */
1620 	connect_reply_upcall(ep, -ECONNRESET);
1621 	c4iw_put_ep(&ep->com);
1622 out:
1623 	return err;
1624 }
1625 
1626 static int act_open_rpl(struct c4iw_dev *dev, struct sk_buff *skb)
1627 {
1628 	struct c4iw_ep *ep;
1629 	struct cpl_act_open_rpl *rpl = cplhdr(skb);
1630 	unsigned int atid = GET_TID_TID(GET_AOPEN_ATID(
1631 					ntohl(rpl->atid_status)));
1632 	struct tid_info *t = dev->rdev.lldi.tids;
1633 	int status = GET_AOPEN_STATUS(ntohl(rpl->atid_status));
1634 
1635 	ep = lookup_atid(t, atid);
1636 
1637 	PDBG("%s ep %p atid %u status %u errno %d\n", __func__, ep, atid,
1638 	     status, status2errno(status));
1639 
1640 	if (status == CPL_ERR_RTX_NEG_ADVICE) {
1641 		printk(KERN_WARNING MOD "Connection problems for atid %u\n",
1642 			atid);
1643 		return 0;
1644 	}
1645 
1646 	set_bit(ACT_OPEN_RPL, &ep->com.history);
1647 
1648 	/*
1649 	 * Log interesting failures.
1650 	 */
1651 	switch (status) {
1652 	case CPL_ERR_CONN_RESET:
1653 	case CPL_ERR_CONN_TIMEDOUT:
1654 		break;
1655 	case CPL_ERR_TCAM_FULL:
1656 		if (dev->rdev.lldi.enable_fw_ofld_conn) {
1657 			mutex_lock(&dev->rdev.stats.lock);
1658 			dev->rdev.stats.tcam_full++;
1659 			mutex_unlock(&dev->rdev.stats.lock);
1660 			send_fw_act_open_req(ep,
1661 					     GET_TID_TID(GET_AOPEN_ATID(
1662 					     ntohl(rpl->atid_status))));
1663 			return 0;
1664 		}
1665 		break;
1666 	case CPL_ERR_CONN_EXIST:
1667 		if (ep->retry_count++ < ACT_OPEN_RETRY_COUNT) {
1668 			set_bit(ACT_RETRY_INUSE, &ep->com.history);
1669 			remove_handle(ep->com.dev, &ep->com.dev->atid_idr,
1670 					atid);
1671 			cxgb4_free_atid(t, atid);
1672 			dst_release(ep->dst);
1673 			cxgb4_l2t_release(ep->l2t);
1674 			c4iw_reconnect(ep);
1675 			return 0;
1676 		}
1677 		break;
1678 	default:
1679 		printk(KERN_INFO MOD "Active open failure - "
1680 		       "atid %u status %u errno %d %pI4:%u->%pI4:%u\n",
1681 		       atid, status, status2errno(status),
1682 		       &ep->com.local_addr.sin_addr.s_addr,
1683 		       ntohs(ep->com.local_addr.sin_port),
1684 		       &ep->com.remote_addr.sin_addr.s_addr,
1685 		       ntohs(ep->com.remote_addr.sin_port));
1686 		break;
1687 	}
1688 
1689 	connect_reply_upcall(ep, status2errno(status));
1690 	state_set(&ep->com, DEAD);
1691 
1692 	if (status && act_open_has_tid(status))
1693 		cxgb4_remove_tid(ep->com.dev->rdev.lldi.tids, 0, GET_TID(rpl));
1694 
1695 	remove_handle(ep->com.dev, &ep->com.dev->atid_idr, atid);
1696 	cxgb4_free_atid(t, atid);
1697 	dst_release(ep->dst);
1698 	cxgb4_l2t_release(ep->l2t);
1699 	c4iw_put_ep(&ep->com);
1700 
1701 	return 0;
1702 }
1703 
1704 static int pass_open_rpl(struct c4iw_dev *dev, struct sk_buff *skb)
1705 {
1706 	struct cpl_pass_open_rpl *rpl = cplhdr(skb);
1707 	struct tid_info *t = dev->rdev.lldi.tids;
1708 	unsigned int stid = GET_TID(rpl);
1709 	struct c4iw_listen_ep *ep = lookup_stid(t, stid);
1710 
1711 	if (!ep) {
1712 		PDBG("%s stid %d lookup failure!\n", __func__, stid);
1713 		goto out;
1714 	}
1715 	PDBG("%s ep %p status %d error %d\n", __func__, ep,
1716 	     rpl->status, status2errno(rpl->status));
1717 	c4iw_wake_up(&ep->com.wr_wait, status2errno(rpl->status));
1718 
1719 out:
1720 	return 0;
1721 }
1722 
1723 static int listen_stop(struct c4iw_listen_ep *ep)
1724 {
1725 	struct sk_buff *skb;
1726 	struct cpl_close_listsvr_req *req;
1727 
1728 	PDBG("%s ep %p\n", __func__, ep);
1729 	skb = get_skb(NULL, sizeof(*req), GFP_KERNEL);
1730 	if (!skb) {
1731 		printk(KERN_ERR MOD "%s - failed to alloc skb\n", __func__);
1732 		return -ENOMEM;
1733 	}
1734 	req = (struct cpl_close_listsvr_req *) skb_put(skb, sizeof(*req));
1735 	INIT_TP_WR(req, 0);
1736 	OPCODE_TID(req) = cpu_to_be32(MK_OPCODE_TID(CPL_CLOSE_LISTSRV_REQ,
1737 						    ep->stid));
1738 	req->reply_ctrl = cpu_to_be16(
1739 			  QUEUENO(ep->com.dev->rdev.lldi.rxq_ids[0]));
1740 	set_wr_txq(skb, CPL_PRIORITY_SETUP, 0);
1741 	return c4iw_ofld_send(&ep->com.dev->rdev, skb);
1742 }
1743 
1744 static int close_listsrv_rpl(struct c4iw_dev *dev, struct sk_buff *skb)
1745 {
1746 	struct cpl_close_listsvr_rpl *rpl = cplhdr(skb);
1747 	struct tid_info *t = dev->rdev.lldi.tids;
1748 	unsigned int stid = GET_TID(rpl);
1749 	struct c4iw_listen_ep *ep = lookup_stid(t, stid);
1750 
1751 	PDBG("%s ep %p\n", __func__, ep);
1752 	c4iw_wake_up(&ep->com.wr_wait, status2errno(rpl->status));
1753 	return 0;
1754 }
1755 
1756 static void accept_cr(struct c4iw_ep *ep, __be32 peer_ip, struct sk_buff *skb,
1757 		      struct cpl_pass_accept_req *req)
1758 {
1759 	struct cpl_pass_accept_rpl *rpl;
1760 	unsigned int mtu_idx;
1761 	u64 opt0;
1762 	u32 opt2;
1763 	int wscale;
1764 
1765 	PDBG("%s ep %p tid %u\n", __func__, ep, ep->hwtid);
1766 	BUG_ON(skb_cloned(skb));
1767 	skb_trim(skb, sizeof(*rpl));
1768 	skb_get(skb);
1769 	cxgb4_best_mtu(ep->com.dev->rdev.lldi.mtus, ep->mtu, &mtu_idx);
1770 	wscale = compute_wscale(rcv_win);
1771 	opt0 = (nocong ? NO_CONG(1) : 0) |
1772 	       KEEP_ALIVE(1) |
1773 	       DELACK(1) |
1774 	       WND_SCALE(wscale) |
1775 	       MSS_IDX(mtu_idx) |
1776 	       L2T_IDX(ep->l2t->idx) |
1777 	       TX_CHAN(ep->tx_chan) |
1778 	       SMAC_SEL(ep->smac_idx) |
1779 	       DSCP(ep->tos >> 2) |
1780 	       ULP_MODE(ULP_MODE_TCPDDP) |
1781 	       RCV_BUFSIZ(rcv_win>>10);
1782 	opt2 = RX_CHANNEL(0) |
1783 	       RSS_QUEUE_VALID | RSS_QUEUE(ep->rss_qid);
1784 
1785 	if (enable_tcp_timestamps && req->tcpopt.tstamp)
1786 		opt2 |= TSTAMPS_EN(1);
1787 	if (enable_tcp_sack && req->tcpopt.sack)
1788 		opt2 |= SACK_EN(1);
1789 	if (wscale && enable_tcp_window_scaling)
1790 		opt2 |= WND_SCALE_EN(1);
1791 	if (enable_ecn) {
1792 		const struct tcphdr *tcph;
1793 		u32 hlen = ntohl(req->hdr_len);
1794 
1795 		tcph = (const void *)(req + 1) + G_ETH_HDR_LEN(hlen) +
1796 			G_IP_HDR_LEN(hlen);
1797 		if (tcph->ece && tcph->cwr)
1798 			opt2 |= CCTRL_ECN(1);
1799 	}
1800 
1801 	rpl = cplhdr(skb);
1802 	INIT_TP_WR(rpl, ep->hwtid);
1803 	OPCODE_TID(rpl) = cpu_to_be32(MK_OPCODE_TID(CPL_PASS_ACCEPT_RPL,
1804 				      ep->hwtid));
1805 	rpl->opt0 = cpu_to_be64(opt0);
1806 	rpl->opt2 = cpu_to_be32(opt2);
1807 	set_wr_txq(skb, CPL_PRIORITY_SETUP, ep->ctrlq_idx);
1808 	c4iw_l2t_send(&ep->com.dev->rdev, skb, ep->l2t);
1809 
1810 	return;
1811 }
1812 
1813 static void reject_cr(struct c4iw_dev *dev, u32 hwtid, __be32 peer_ip,
1814 		      struct sk_buff *skb)
1815 {
1816 	PDBG("%s c4iw_dev %p tid %u peer_ip %x\n", __func__, dev, hwtid,
1817 	     peer_ip);
1818 	BUG_ON(skb_cloned(skb));
1819 	skb_trim(skb, sizeof(struct cpl_tid_release));
1820 	skb_get(skb);
1821 	release_tid(&dev->rdev, hwtid, skb);
1822 	return;
1823 }
1824 
1825 static void get_4tuple(struct cpl_pass_accept_req *req,
1826 		       __be32 *local_ip, __be32 *peer_ip,
1827 		       __be16 *local_port, __be16 *peer_port)
1828 {
1829 	int eth_len = G_ETH_HDR_LEN(be32_to_cpu(req->hdr_len));
1830 	int ip_len = G_IP_HDR_LEN(be32_to_cpu(req->hdr_len));
1831 	struct iphdr *ip = (struct iphdr *)((u8 *)(req + 1) + eth_len);
1832 	struct tcphdr *tcp = (struct tcphdr *)
1833 			     ((u8 *)(req + 1) + eth_len + ip_len);
1834 
1835 	PDBG("%s saddr 0x%x daddr 0x%x sport %u dport %u\n", __func__,
1836 	     ntohl(ip->saddr), ntohl(ip->daddr), ntohs(tcp->source),
1837 	     ntohs(tcp->dest));
1838 
1839 	*peer_ip = ip->saddr;
1840 	*local_ip = ip->daddr;
1841 	*peer_port = tcp->source;
1842 	*local_port = tcp->dest;
1843 
1844 	return;
1845 }
1846 
1847 static int import_ep(struct c4iw_ep *ep, __be32 peer_ip, struct dst_entry *dst,
1848 		     struct c4iw_dev *cdev, bool clear_mpa_v1)
1849 {
1850 	struct neighbour *n;
1851 	int err, step;
1852 
1853 	n = dst_neigh_lookup(dst, &peer_ip);
1854 	if (!n)
1855 		return -ENODEV;
1856 
1857 	rcu_read_lock();
1858 	err = -ENOMEM;
1859 	if (n->dev->flags & IFF_LOOPBACK) {
1860 		struct net_device *pdev;
1861 
1862 		pdev = ip_dev_find(&init_net, peer_ip);
1863 		if (!pdev) {
1864 			err = -ENODEV;
1865 			goto out;
1866 		}
1867 		ep->l2t = cxgb4_l2t_get(cdev->rdev.lldi.l2t,
1868 					n, pdev, 0);
1869 		if (!ep->l2t)
1870 			goto out;
1871 		ep->mtu = pdev->mtu;
1872 		ep->tx_chan = cxgb4_port_chan(pdev);
1873 		ep->smac_idx = (cxgb4_port_viid(pdev) & 0x7F) << 1;
1874 		step = cdev->rdev.lldi.ntxq /
1875 			cdev->rdev.lldi.nchan;
1876 		ep->txq_idx = cxgb4_port_idx(pdev) * step;
1877 		step = cdev->rdev.lldi.nrxq /
1878 			cdev->rdev.lldi.nchan;
1879 		ep->ctrlq_idx = cxgb4_port_idx(pdev);
1880 		ep->rss_qid = cdev->rdev.lldi.rxq_ids[
1881 			cxgb4_port_idx(pdev) * step];
1882 		dev_put(pdev);
1883 	} else {
1884 		ep->l2t = cxgb4_l2t_get(cdev->rdev.lldi.l2t,
1885 					n, n->dev, 0);
1886 		if (!ep->l2t)
1887 			goto out;
1888 		ep->mtu = dst_mtu(dst);
1889 		ep->tx_chan = cxgb4_port_chan(n->dev);
1890 		ep->smac_idx = (cxgb4_port_viid(n->dev) & 0x7F) << 1;
1891 		step = cdev->rdev.lldi.ntxq /
1892 			cdev->rdev.lldi.nchan;
1893 		ep->txq_idx = cxgb4_port_idx(n->dev) * step;
1894 		ep->ctrlq_idx = cxgb4_port_idx(n->dev);
1895 		step = cdev->rdev.lldi.nrxq /
1896 			cdev->rdev.lldi.nchan;
1897 		ep->rss_qid = cdev->rdev.lldi.rxq_ids[
1898 			cxgb4_port_idx(n->dev) * step];
1899 
1900 		if (clear_mpa_v1) {
1901 			ep->retry_with_mpa_v1 = 0;
1902 			ep->tried_with_mpa_v1 = 0;
1903 		}
1904 	}
1905 	err = 0;
1906 out:
1907 	rcu_read_unlock();
1908 
1909 	neigh_release(n);
1910 
1911 	return err;
1912 }
1913 
1914 static int pass_accept_req(struct c4iw_dev *dev, struct sk_buff *skb)
1915 {
1916 	struct c4iw_ep *child_ep = NULL, *parent_ep;
1917 	struct cpl_pass_accept_req *req = cplhdr(skb);
1918 	unsigned int stid = GET_POPEN_TID(ntohl(req->tos_stid));
1919 	struct tid_info *t = dev->rdev.lldi.tids;
1920 	unsigned int hwtid = GET_TID(req);
1921 	struct dst_entry *dst;
1922 	struct rtable *rt;
1923 	__be32 local_ip, peer_ip = 0;
1924 	__be16 local_port, peer_port;
1925 	int err;
1926 	u16 peer_mss = ntohs(req->tcpopt.mss);
1927 
1928 	parent_ep = lookup_stid(t, stid);
1929 	if (!parent_ep) {
1930 		PDBG("%s connect request on invalid stid %d\n", __func__, stid);
1931 		goto reject;
1932 	}
1933 	get_4tuple(req, &local_ip, &peer_ip, &local_port, &peer_port);
1934 
1935 	PDBG("%s parent ep %p hwtid %u laddr 0x%x raddr 0x%x lport %d " \
1936 	     "rport %d peer_mss %d\n", __func__, parent_ep, hwtid,
1937 	     ntohl(local_ip), ntohl(peer_ip), ntohs(local_port),
1938 	     ntohs(peer_port), peer_mss);
1939 
1940 	if (state_read(&parent_ep->com) != LISTEN) {
1941 		printk(KERN_ERR "%s - listening ep not in LISTEN\n",
1942 		       __func__);
1943 		goto reject;
1944 	}
1945 
1946 	/* Find output route */
1947 	rt = find_route(dev, local_ip, peer_ip, local_port, peer_port,
1948 			GET_POPEN_TOS(ntohl(req->tos_stid)));
1949 	if (!rt) {
1950 		printk(KERN_ERR MOD "%s - failed to find dst entry!\n",
1951 		       __func__);
1952 		goto reject;
1953 	}
1954 	dst = &rt->dst;
1955 
1956 	child_ep = alloc_ep(sizeof(*child_ep), GFP_KERNEL);
1957 	if (!child_ep) {
1958 		printk(KERN_ERR MOD "%s - failed to allocate ep entry!\n",
1959 		       __func__);
1960 		dst_release(dst);
1961 		goto reject;
1962 	}
1963 
1964 	err = import_ep(child_ep, peer_ip, dst, dev, false);
1965 	if (err) {
1966 		printk(KERN_ERR MOD "%s - failed to allocate l2t entry!\n",
1967 		       __func__);
1968 		dst_release(dst);
1969 		kfree(child_ep);
1970 		goto reject;
1971 	}
1972 
1973 	if (peer_mss && child_ep->mtu > (peer_mss + 40))
1974 		child_ep->mtu = peer_mss + 40;
1975 
1976 	state_set(&child_ep->com, CONNECTING);
1977 	child_ep->com.dev = dev;
1978 	child_ep->com.cm_id = NULL;
1979 	child_ep->com.local_addr.sin_family = PF_INET;
1980 	child_ep->com.local_addr.sin_port = local_port;
1981 	child_ep->com.local_addr.sin_addr.s_addr = local_ip;
1982 	child_ep->com.remote_addr.sin_family = PF_INET;
1983 	child_ep->com.remote_addr.sin_port = peer_port;
1984 	child_ep->com.remote_addr.sin_addr.s_addr = peer_ip;
1985 	c4iw_get_ep(&parent_ep->com);
1986 	child_ep->parent_ep = parent_ep;
1987 	child_ep->tos = GET_POPEN_TOS(ntohl(req->tos_stid));
1988 	child_ep->dst = dst;
1989 	child_ep->hwtid = hwtid;
1990 
1991 	PDBG("%s tx_chan %u smac_idx %u rss_qid %u\n", __func__,
1992 	     child_ep->tx_chan, child_ep->smac_idx, child_ep->rss_qid);
1993 
1994 	init_timer(&child_ep->timer);
1995 	cxgb4_insert_tid(t, child_ep, hwtid);
1996 	accept_cr(child_ep, peer_ip, skb, req);
1997 	set_bit(PASS_ACCEPT_REQ, &child_ep->com.history);
1998 	goto out;
1999 reject:
2000 	reject_cr(dev, hwtid, peer_ip, skb);
2001 out:
2002 	return 0;
2003 }
2004 
2005 static int pass_establish(struct c4iw_dev *dev, struct sk_buff *skb)
2006 {
2007 	struct c4iw_ep *ep;
2008 	struct cpl_pass_establish *req = cplhdr(skb);
2009 	struct tid_info *t = dev->rdev.lldi.tids;
2010 	unsigned int tid = GET_TID(req);
2011 
2012 	ep = lookup_tid(t, tid);
2013 	PDBG("%s ep %p tid %u\n", __func__, ep, ep->hwtid);
2014 	ep->snd_seq = be32_to_cpu(req->snd_isn);
2015 	ep->rcv_seq = be32_to_cpu(req->rcv_isn);
2016 
2017 	PDBG("%s ep %p hwtid %u tcp_opt 0x%02x\n", __func__, ep, tid,
2018 	     ntohs(req->tcp_opt));
2019 
2020 	set_emss(ep, ntohs(req->tcp_opt));
2021 	insert_handle(dev, &dev->hwtid_idr, ep, ep->hwtid);
2022 
2023 	dst_confirm(ep->dst);
2024 	state_set(&ep->com, MPA_REQ_WAIT);
2025 	start_ep_timer(ep);
2026 	send_flowc(ep, skb);
2027 	set_bit(PASS_ESTAB, &ep->com.history);
2028 
2029 	return 0;
2030 }
2031 
2032 static int peer_close(struct c4iw_dev *dev, struct sk_buff *skb)
2033 {
2034 	struct cpl_peer_close *hdr = cplhdr(skb);
2035 	struct c4iw_ep *ep;
2036 	struct c4iw_qp_attributes attrs;
2037 	int disconnect = 1;
2038 	int release = 0;
2039 	struct tid_info *t = dev->rdev.lldi.tids;
2040 	unsigned int tid = GET_TID(hdr);
2041 	int ret;
2042 
2043 	ep = lookup_tid(t, tid);
2044 	PDBG("%s ep %p tid %u\n", __func__, ep, ep->hwtid);
2045 	dst_confirm(ep->dst);
2046 
2047 	set_bit(PEER_CLOSE, &ep->com.history);
2048 	mutex_lock(&ep->com.mutex);
2049 	switch (ep->com.state) {
2050 	case MPA_REQ_WAIT:
2051 		__state_set(&ep->com, CLOSING);
2052 		break;
2053 	case MPA_REQ_SENT:
2054 		__state_set(&ep->com, CLOSING);
2055 		connect_reply_upcall(ep, -ECONNRESET);
2056 		break;
2057 	case MPA_REQ_RCVD:
2058 
2059 		/*
2060 		 * We're gonna mark this puppy DEAD, but keep
2061 		 * the reference on it until the ULP accepts or
2062 		 * rejects the CR. Also wake up anyone waiting
2063 		 * in rdma connection migration (see c4iw_accept_cr()).
2064 		 */
2065 		__state_set(&ep->com, CLOSING);
2066 		PDBG("waking up ep %p tid %u\n", ep, ep->hwtid);
2067 		c4iw_wake_up(&ep->com.wr_wait, -ECONNRESET);
2068 		break;
2069 	case MPA_REP_SENT:
2070 		__state_set(&ep->com, CLOSING);
2071 		PDBG("waking up ep %p tid %u\n", ep, ep->hwtid);
2072 		c4iw_wake_up(&ep->com.wr_wait, -ECONNRESET);
2073 		break;
2074 	case FPDU_MODE:
2075 		start_ep_timer(ep);
2076 		__state_set(&ep->com, CLOSING);
2077 		attrs.next_state = C4IW_QP_STATE_CLOSING;
2078 		ret = c4iw_modify_qp(ep->com.qp->rhp, ep->com.qp,
2079 				       C4IW_QP_ATTR_NEXT_STATE, &attrs, 1);
2080 		if (ret != -ECONNRESET) {
2081 			peer_close_upcall(ep);
2082 			disconnect = 1;
2083 		}
2084 		break;
2085 	case ABORTING:
2086 		disconnect = 0;
2087 		break;
2088 	case CLOSING:
2089 		__state_set(&ep->com, MORIBUND);
2090 		disconnect = 0;
2091 		break;
2092 	case MORIBUND:
2093 		stop_ep_timer(ep);
2094 		if (ep->com.cm_id && ep->com.qp) {
2095 			attrs.next_state = C4IW_QP_STATE_IDLE;
2096 			c4iw_modify_qp(ep->com.qp->rhp, ep->com.qp,
2097 				       C4IW_QP_ATTR_NEXT_STATE, &attrs, 1);
2098 		}
2099 		close_complete_upcall(ep);
2100 		__state_set(&ep->com, DEAD);
2101 		release = 1;
2102 		disconnect = 0;
2103 		break;
2104 	case DEAD:
2105 		disconnect = 0;
2106 		break;
2107 	default:
2108 		BUG_ON(1);
2109 	}
2110 	mutex_unlock(&ep->com.mutex);
2111 	if (disconnect)
2112 		c4iw_ep_disconnect(ep, 0, GFP_KERNEL);
2113 	if (release)
2114 		release_ep_resources(ep);
2115 	return 0;
2116 }
2117 
2118 /*
2119  * Returns whether an ABORT_REQ_RSS message is a negative advice.
2120  */
2121 static int is_neg_adv_abort(unsigned int status)
2122 {
2123 	return status == CPL_ERR_RTX_NEG_ADVICE ||
2124 	       status == CPL_ERR_PERSIST_NEG_ADVICE;
2125 }
2126 
2127 static int peer_abort(struct c4iw_dev *dev, struct sk_buff *skb)
2128 {
2129 	struct cpl_abort_req_rss *req = cplhdr(skb);
2130 	struct c4iw_ep *ep;
2131 	struct cpl_abort_rpl *rpl;
2132 	struct sk_buff *rpl_skb;
2133 	struct c4iw_qp_attributes attrs;
2134 	int ret;
2135 	int release = 0;
2136 	struct tid_info *t = dev->rdev.lldi.tids;
2137 	unsigned int tid = GET_TID(req);
2138 
2139 	ep = lookup_tid(t, tid);
2140 	if (is_neg_adv_abort(req->status)) {
2141 		PDBG("%s neg_adv_abort ep %p tid %u\n", __func__, ep,
2142 		     ep->hwtid);
2143 		return 0;
2144 	}
2145 	PDBG("%s ep %p tid %u state %u\n", __func__, ep, ep->hwtid,
2146 	     ep->com.state);
2147 	set_bit(PEER_ABORT, &ep->com.history);
2148 
2149 	/*
2150 	 * Wake up any threads in rdma_init() or rdma_fini().
2151 	 * However, this is not needed if com state is just
2152 	 * MPA_REQ_SENT
2153 	 */
2154 	if (ep->com.state != MPA_REQ_SENT)
2155 		c4iw_wake_up(&ep->com.wr_wait, -ECONNRESET);
2156 
2157 	mutex_lock(&ep->com.mutex);
2158 	switch (ep->com.state) {
2159 	case CONNECTING:
2160 		break;
2161 	case MPA_REQ_WAIT:
2162 		stop_ep_timer(ep);
2163 		break;
2164 	case MPA_REQ_SENT:
2165 		stop_ep_timer(ep);
2166 		if (mpa_rev == 2 && ep->tried_with_mpa_v1)
2167 			connect_reply_upcall(ep, -ECONNRESET);
2168 		else {
2169 			/*
2170 			 * we just don't send notification upwards because we
2171 			 * want to retry with mpa_v1 without upper layers even
2172 			 * knowing it.
2173 			 *
2174 			 * do some housekeeping so as to re-initiate the
2175 			 * connection
2176 			 */
2177 			PDBG("%s: mpa_rev=%d. Retrying with mpav1\n", __func__,
2178 			     mpa_rev);
2179 			ep->retry_with_mpa_v1 = 1;
2180 		}
2181 		break;
2182 	case MPA_REP_SENT:
2183 		break;
2184 	case MPA_REQ_RCVD:
2185 		break;
2186 	case MORIBUND:
2187 	case CLOSING:
2188 		stop_ep_timer(ep);
2189 		/*FALLTHROUGH*/
2190 	case FPDU_MODE:
2191 		if (ep->com.cm_id && ep->com.qp) {
2192 			attrs.next_state = C4IW_QP_STATE_ERROR;
2193 			ret = c4iw_modify_qp(ep->com.qp->rhp,
2194 				     ep->com.qp, C4IW_QP_ATTR_NEXT_STATE,
2195 				     &attrs, 1);
2196 			if (ret)
2197 				printk(KERN_ERR MOD
2198 				       "%s - qp <- error failed!\n",
2199 				       __func__);
2200 		}
2201 		peer_abort_upcall(ep);
2202 		break;
2203 	case ABORTING:
2204 		break;
2205 	case DEAD:
2206 		PDBG("%s PEER_ABORT IN DEAD STATE!!!!\n", __func__);
2207 		mutex_unlock(&ep->com.mutex);
2208 		return 0;
2209 	default:
2210 		BUG_ON(1);
2211 		break;
2212 	}
2213 	dst_confirm(ep->dst);
2214 	if (ep->com.state != ABORTING) {
2215 		__state_set(&ep->com, DEAD);
2216 		/* we don't release if we want to retry with mpa_v1 */
2217 		if (!ep->retry_with_mpa_v1)
2218 			release = 1;
2219 	}
2220 	mutex_unlock(&ep->com.mutex);
2221 
2222 	rpl_skb = get_skb(skb, sizeof(*rpl), GFP_KERNEL);
2223 	if (!rpl_skb) {
2224 		printk(KERN_ERR MOD "%s - cannot allocate skb!\n",
2225 		       __func__);
2226 		release = 1;
2227 		goto out;
2228 	}
2229 	set_wr_txq(skb, CPL_PRIORITY_DATA, ep->txq_idx);
2230 	rpl = (struct cpl_abort_rpl *) skb_put(rpl_skb, sizeof(*rpl));
2231 	INIT_TP_WR(rpl, ep->hwtid);
2232 	OPCODE_TID(rpl) = cpu_to_be32(MK_OPCODE_TID(CPL_ABORT_RPL, ep->hwtid));
2233 	rpl->cmd = CPL_ABORT_NO_RST;
2234 	c4iw_ofld_send(&ep->com.dev->rdev, rpl_skb);
2235 out:
2236 	if (release)
2237 		release_ep_resources(ep);
2238 
2239 	/* retry with mpa-v1 */
2240 	if (ep && ep->retry_with_mpa_v1) {
2241 		cxgb4_remove_tid(ep->com.dev->rdev.lldi.tids, 0, ep->hwtid);
2242 		dst_release(ep->dst);
2243 		cxgb4_l2t_release(ep->l2t);
2244 		c4iw_reconnect(ep);
2245 	}
2246 
2247 	return 0;
2248 }
2249 
2250 static int close_con_rpl(struct c4iw_dev *dev, struct sk_buff *skb)
2251 {
2252 	struct c4iw_ep *ep;
2253 	struct c4iw_qp_attributes attrs;
2254 	struct cpl_close_con_rpl *rpl = cplhdr(skb);
2255 	int release = 0;
2256 	struct tid_info *t = dev->rdev.lldi.tids;
2257 	unsigned int tid = GET_TID(rpl);
2258 
2259 	ep = lookup_tid(t, tid);
2260 
2261 	PDBG("%s ep %p tid %u\n", __func__, ep, ep->hwtid);
2262 	BUG_ON(!ep);
2263 
2264 	/* The cm_id may be null if we failed to connect */
2265 	mutex_lock(&ep->com.mutex);
2266 	switch (ep->com.state) {
2267 	case CLOSING:
2268 		__state_set(&ep->com, MORIBUND);
2269 		break;
2270 	case MORIBUND:
2271 		stop_ep_timer(ep);
2272 		if ((ep->com.cm_id) && (ep->com.qp)) {
2273 			attrs.next_state = C4IW_QP_STATE_IDLE;
2274 			c4iw_modify_qp(ep->com.qp->rhp,
2275 					     ep->com.qp,
2276 					     C4IW_QP_ATTR_NEXT_STATE,
2277 					     &attrs, 1);
2278 		}
2279 		close_complete_upcall(ep);
2280 		__state_set(&ep->com, DEAD);
2281 		release = 1;
2282 		break;
2283 	case ABORTING:
2284 	case DEAD:
2285 		break;
2286 	default:
2287 		BUG_ON(1);
2288 		break;
2289 	}
2290 	mutex_unlock(&ep->com.mutex);
2291 	if (release)
2292 		release_ep_resources(ep);
2293 	return 0;
2294 }
2295 
2296 static int terminate(struct c4iw_dev *dev, struct sk_buff *skb)
2297 {
2298 	struct cpl_rdma_terminate *rpl = cplhdr(skb);
2299 	struct tid_info *t = dev->rdev.lldi.tids;
2300 	unsigned int tid = GET_TID(rpl);
2301 	struct c4iw_ep *ep;
2302 	struct c4iw_qp_attributes attrs;
2303 
2304 	ep = lookup_tid(t, tid);
2305 	BUG_ON(!ep);
2306 
2307 	if (ep && ep->com.qp) {
2308 		printk(KERN_WARNING MOD "TERM received tid %u qpid %u\n", tid,
2309 		       ep->com.qp->wq.sq.qid);
2310 		attrs.next_state = C4IW_QP_STATE_TERMINATE;
2311 		c4iw_modify_qp(ep->com.qp->rhp, ep->com.qp,
2312 			       C4IW_QP_ATTR_NEXT_STATE, &attrs, 1);
2313 	} else
2314 		printk(KERN_WARNING MOD "TERM received tid %u no ep/qp\n", tid);
2315 
2316 	return 0;
2317 }
2318 
2319 /*
2320  * Upcall from the adapter indicating data has been transmitted.
2321  * For us its just the single MPA request or reply.  We can now free
2322  * the skb holding the mpa message.
2323  */
2324 static int fw4_ack(struct c4iw_dev *dev, struct sk_buff *skb)
2325 {
2326 	struct c4iw_ep *ep;
2327 	struct cpl_fw4_ack *hdr = cplhdr(skb);
2328 	u8 credits = hdr->credits;
2329 	unsigned int tid = GET_TID(hdr);
2330 	struct tid_info *t = dev->rdev.lldi.tids;
2331 
2332 
2333 	ep = lookup_tid(t, tid);
2334 	PDBG("%s ep %p tid %u credits %u\n", __func__, ep, ep->hwtid, credits);
2335 	if (credits == 0) {
2336 		PDBG("%s 0 credit ack ep %p tid %u state %u\n",
2337 		     __func__, ep, ep->hwtid, state_read(&ep->com));
2338 		return 0;
2339 	}
2340 
2341 	dst_confirm(ep->dst);
2342 	if (ep->mpa_skb) {
2343 		PDBG("%s last streaming msg ack ep %p tid %u state %u "
2344 		     "initiator %u freeing skb\n", __func__, ep, ep->hwtid,
2345 		     state_read(&ep->com), ep->mpa_attr.initiator ? 1 : 0);
2346 		kfree_skb(ep->mpa_skb);
2347 		ep->mpa_skb = NULL;
2348 	}
2349 	return 0;
2350 }
2351 
2352 int c4iw_reject_cr(struct iw_cm_id *cm_id, const void *pdata, u8 pdata_len)
2353 {
2354 	int err;
2355 	struct c4iw_ep *ep = to_ep(cm_id);
2356 	PDBG("%s ep %p tid %u\n", __func__, ep, ep->hwtid);
2357 
2358 	if (state_read(&ep->com) == DEAD) {
2359 		c4iw_put_ep(&ep->com);
2360 		return -ECONNRESET;
2361 	}
2362 	set_bit(ULP_REJECT, &ep->com.history);
2363 	BUG_ON(state_read(&ep->com) != MPA_REQ_RCVD);
2364 	if (mpa_rev == 0)
2365 		abort_connection(ep, NULL, GFP_KERNEL);
2366 	else {
2367 		err = send_mpa_reject(ep, pdata, pdata_len);
2368 		err = c4iw_ep_disconnect(ep, 0, GFP_KERNEL);
2369 	}
2370 	c4iw_put_ep(&ep->com);
2371 	return 0;
2372 }
2373 
2374 int c4iw_accept_cr(struct iw_cm_id *cm_id, struct iw_cm_conn_param *conn_param)
2375 {
2376 	int err;
2377 	struct c4iw_qp_attributes attrs;
2378 	enum c4iw_qp_attr_mask mask;
2379 	struct c4iw_ep *ep = to_ep(cm_id);
2380 	struct c4iw_dev *h = to_c4iw_dev(cm_id->device);
2381 	struct c4iw_qp *qp = get_qhp(h, conn_param->qpn);
2382 
2383 	PDBG("%s ep %p tid %u\n", __func__, ep, ep->hwtid);
2384 	if (state_read(&ep->com) == DEAD) {
2385 		err = -ECONNRESET;
2386 		goto err;
2387 	}
2388 
2389 	BUG_ON(state_read(&ep->com) != MPA_REQ_RCVD);
2390 	BUG_ON(!qp);
2391 
2392 	set_bit(ULP_ACCEPT, &ep->com.history);
2393 	if ((conn_param->ord > c4iw_max_read_depth) ||
2394 	    (conn_param->ird > c4iw_max_read_depth)) {
2395 		abort_connection(ep, NULL, GFP_KERNEL);
2396 		err = -EINVAL;
2397 		goto err;
2398 	}
2399 
2400 	if (ep->mpa_attr.version == 2 && ep->mpa_attr.enhanced_rdma_conn) {
2401 		if (conn_param->ord > ep->ird) {
2402 			ep->ird = conn_param->ird;
2403 			ep->ord = conn_param->ord;
2404 			send_mpa_reject(ep, conn_param->private_data,
2405 					conn_param->private_data_len);
2406 			abort_connection(ep, NULL, GFP_KERNEL);
2407 			err = -ENOMEM;
2408 			goto err;
2409 		}
2410 		if (conn_param->ird > ep->ord) {
2411 			if (!ep->ord)
2412 				conn_param->ird = 1;
2413 			else {
2414 				abort_connection(ep, NULL, GFP_KERNEL);
2415 				err = -ENOMEM;
2416 				goto err;
2417 			}
2418 		}
2419 
2420 	}
2421 	ep->ird = conn_param->ird;
2422 	ep->ord = conn_param->ord;
2423 
2424 	if (ep->mpa_attr.version != 2)
2425 		if (peer2peer && ep->ird == 0)
2426 			ep->ird = 1;
2427 
2428 	PDBG("%s %d ird %d ord %d\n", __func__, __LINE__, ep->ird, ep->ord);
2429 
2430 	cm_id->add_ref(cm_id);
2431 	ep->com.cm_id = cm_id;
2432 	ep->com.qp = qp;
2433 
2434 	/* bind QP to EP and move to RTS */
2435 	attrs.mpa_attr = ep->mpa_attr;
2436 	attrs.max_ird = ep->ird;
2437 	attrs.max_ord = ep->ord;
2438 	attrs.llp_stream_handle = ep;
2439 	attrs.next_state = C4IW_QP_STATE_RTS;
2440 
2441 	/* bind QP and TID with INIT_WR */
2442 	mask = C4IW_QP_ATTR_NEXT_STATE |
2443 			     C4IW_QP_ATTR_LLP_STREAM_HANDLE |
2444 			     C4IW_QP_ATTR_MPA_ATTR |
2445 			     C4IW_QP_ATTR_MAX_IRD |
2446 			     C4IW_QP_ATTR_MAX_ORD;
2447 
2448 	err = c4iw_modify_qp(ep->com.qp->rhp,
2449 			     ep->com.qp, mask, &attrs, 1);
2450 	if (err)
2451 		goto err1;
2452 	err = send_mpa_reply(ep, conn_param->private_data,
2453 			     conn_param->private_data_len);
2454 	if (err)
2455 		goto err1;
2456 
2457 	state_set(&ep->com, FPDU_MODE);
2458 	established_upcall(ep);
2459 	c4iw_put_ep(&ep->com);
2460 	return 0;
2461 err1:
2462 	ep->com.cm_id = NULL;
2463 	ep->com.qp = NULL;
2464 	cm_id->rem_ref(cm_id);
2465 err:
2466 	c4iw_put_ep(&ep->com);
2467 	return err;
2468 }
2469 
2470 int c4iw_connect(struct iw_cm_id *cm_id, struct iw_cm_conn_param *conn_param)
2471 {
2472 	struct c4iw_dev *dev = to_c4iw_dev(cm_id->device);
2473 	struct c4iw_ep *ep;
2474 	struct rtable *rt;
2475 	int err = 0;
2476 
2477 	if ((conn_param->ord > c4iw_max_read_depth) ||
2478 	    (conn_param->ird > c4iw_max_read_depth)) {
2479 		err = -EINVAL;
2480 		goto out;
2481 	}
2482 	ep = alloc_ep(sizeof(*ep), GFP_KERNEL);
2483 	if (!ep) {
2484 		printk(KERN_ERR MOD "%s - cannot alloc ep.\n", __func__);
2485 		err = -ENOMEM;
2486 		goto out;
2487 	}
2488 	init_timer(&ep->timer);
2489 	ep->plen = conn_param->private_data_len;
2490 	if (ep->plen)
2491 		memcpy(ep->mpa_pkt + sizeof(struct mpa_message),
2492 		       conn_param->private_data, ep->plen);
2493 	ep->ird = conn_param->ird;
2494 	ep->ord = conn_param->ord;
2495 
2496 	if (peer2peer && ep->ord == 0)
2497 		ep->ord = 1;
2498 
2499 	cm_id->add_ref(cm_id);
2500 	ep->com.dev = dev;
2501 	ep->com.cm_id = cm_id;
2502 	ep->com.qp = get_qhp(dev, conn_param->qpn);
2503 	BUG_ON(!ep->com.qp);
2504 	PDBG("%s qpn 0x%x qp %p cm_id %p\n", __func__, conn_param->qpn,
2505 	     ep->com.qp, cm_id);
2506 
2507 	/*
2508 	 * Allocate an active TID to initiate a TCP connection.
2509 	 */
2510 	ep->atid = cxgb4_alloc_atid(dev->rdev.lldi.tids, ep);
2511 	if (ep->atid == -1) {
2512 		printk(KERN_ERR MOD "%s - cannot alloc atid.\n", __func__);
2513 		err = -ENOMEM;
2514 		goto fail2;
2515 	}
2516 	insert_handle(dev, &dev->atid_idr, ep, ep->atid);
2517 
2518 	PDBG("%s saddr 0x%x sport 0x%x raddr 0x%x rport 0x%x\n", __func__,
2519 	     ntohl(cm_id->local_addr.sin_addr.s_addr),
2520 	     ntohs(cm_id->local_addr.sin_port),
2521 	     ntohl(cm_id->remote_addr.sin_addr.s_addr),
2522 	     ntohs(cm_id->remote_addr.sin_port));
2523 
2524 	/* find a route */
2525 	rt = find_route(dev,
2526 			cm_id->local_addr.sin_addr.s_addr,
2527 			cm_id->remote_addr.sin_addr.s_addr,
2528 			cm_id->local_addr.sin_port,
2529 			cm_id->remote_addr.sin_port, 0);
2530 	if (!rt) {
2531 		printk(KERN_ERR MOD "%s - cannot find route.\n", __func__);
2532 		err = -EHOSTUNREACH;
2533 		goto fail3;
2534 	}
2535 	ep->dst = &rt->dst;
2536 
2537 	err = import_ep(ep, cm_id->remote_addr.sin_addr.s_addr,
2538 			ep->dst, ep->com.dev, true);
2539 	if (err) {
2540 		printk(KERN_ERR MOD "%s - cannot alloc l2e.\n", __func__);
2541 		goto fail4;
2542 	}
2543 
2544 	PDBG("%s txq_idx %u tx_chan %u smac_idx %u rss_qid %u l2t_idx %u\n",
2545 		__func__, ep->txq_idx, ep->tx_chan, ep->smac_idx, ep->rss_qid,
2546 		ep->l2t->idx);
2547 
2548 	state_set(&ep->com, CONNECTING);
2549 	ep->tos = 0;
2550 	ep->com.local_addr = cm_id->local_addr;
2551 	ep->com.remote_addr = cm_id->remote_addr;
2552 
2553 	/* send connect request to rnic */
2554 	err = send_connect(ep);
2555 	if (!err)
2556 		goto out;
2557 
2558 	cxgb4_l2t_release(ep->l2t);
2559 fail4:
2560 	dst_release(ep->dst);
2561 fail3:
2562 	remove_handle(ep->com.dev, &ep->com.dev->atid_idr, ep->atid);
2563 	cxgb4_free_atid(ep->com.dev->rdev.lldi.tids, ep->atid);
2564 fail2:
2565 	cm_id->rem_ref(cm_id);
2566 	c4iw_put_ep(&ep->com);
2567 out:
2568 	return err;
2569 }
2570 
2571 int c4iw_create_listen(struct iw_cm_id *cm_id, int backlog)
2572 {
2573 	int err = 0;
2574 	struct c4iw_dev *dev = to_c4iw_dev(cm_id->device);
2575 	struct c4iw_listen_ep *ep;
2576 
2577 	might_sleep();
2578 
2579 	ep = alloc_ep(sizeof(*ep), GFP_KERNEL);
2580 	if (!ep) {
2581 		printk(KERN_ERR MOD "%s - cannot alloc ep.\n", __func__);
2582 		err = -ENOMEM;
2583 		goto fail1;
2584 	}
2585 	PDBG("%s ep %p\n", __func__, ep);
2586 	cm_id->add_ref(cm_id);
2587 	ep->com.cm_id = cm_id;
2588 	ep->com.dev = dev;
2589 	ep->backlog = backlog;
2590 	ep->com.local_addr = cm_id->local_addr;
2591 
2592 	/*
2593 	 * Allocate a server TID.
2594 	 */
2595 	if (dev->rdev.lldi.enable_fw_ofld_conn)
2596 		ep->stid = cxgb4_alloc_sftid(dev->rdev.lldi.tids, PF_INET, ep);
2597 	else
2598 		ep->stid = cxgb4_alloc_stid(dev->rdev.lldi.tids, PF_INET, ep);
2599 
2600 	if (ep->stid == -1) {
2601 		printk(KERN_ERR MOD "%s - cannot alloc stid.\n", __func__);
2602 		err = -ENOMEM;
2603 		goto fail2;
2604 	}
2605 	insert_handle(dev, &dev->stid_idr, ep, ep->stid);
2606 	state_set(&ep->com, LISTEN);
2607 	if (dev->rdev.lldi.enable_fw_ofld_conn) {
2608 		do {
2609 			err = cxgb4_create_server_filter(
2610 				ep->com.dev->rdev.lldi.ports[0], ep->stid,
2611 				ep->com.local_addr.sin_addr.s_addr,
2612 				ep->com.local_addr.sin_port,
2613 				0,
2614 				ep->com.dev->rdev.lldi.rxq_ids[0],
2615 				0,
2616 				0);
2617 			if (err == -EBUSY) {
2618 				set_current_state(TASK_UNINTERRUPTIBLE);
2619 				schedule_timeout(usecs_to_jiffies(100));
2620 			}
2621 		} while (err == -EBUSY);
2622 	} else {
2623 		c4iw_init_wr_wait(&ep->com.wr_wait);
2624 		err = cxgb4_create_server(ep->com.dev->rdev.lldi.ports[0],
2625 				ep->stid, ep->com.local_addr.sin_addr.s_addr,
2626 				ep->com.local_addr.sin_port,
2627 				0,
2628 				ep->com.dev->rdev.lldi.rxq_ids[0]);
2629 		if (!err)
2630 			err = c4iw_wait_for_reply(&ep->com.dev->rdev,
2631 						  &ep->com.wr_wait,
2632 						  0, 0, __func__);
2633 	}
2634 	if (!err) {
2635 		cm_id->provider_data = ep;
2636 		goto out;
2637 	}
2638 	pr_err("%s cxgb4_create_server/filter failed err %d " \
2639 	       "stid %d laddr %08x lport %d\n", \
2640 	       __func__, err, ep->stid,
2641 	       ntohl(ep->com.local_addr.sin_addr.s_addr),
2642 	       ntohs(ep->com.local_addr.sin_port));
2643 	cxgb4_free_stid(ep->com.dev->rdev.lldi.tids, ep->stid, PF_INET);
2644 fail2:
2645 	cm_id->rem_ref(cm_id);
2646 	c4iw_put_ep(&ep->com);
2647 fail1:
2648 out:
2649 	return err;
2650 }
2651 
2652 int c4iw_destroy_listen(struct iw_cm_id *cm_id)
2653 {
2654 	int err;
2655 	struct c4iw_listen_ep *ep = to_listen_ep(cm_id);
2656 
2657 	PDBG("%s ep %p\n", __func__, ep);
2658 
2659 	might_sleep();
2660 	state_set(&ep->com, DEAD);
2661 	if (ep->com.dev->rdev.lldi.enable_fw_ofld_conn) {
2662 		err = cxgb4_remove_server_filter(
2663 			ep->com.dev->rdev.lldi.ports[0], ep->stid,
2664 			ep->com.dev->rdev.lldi.rxq_ids[0], 0);
2665 	} else {
2666 		c4iw_init_wr_wait(&ep->com.wr_wait);
2667 		err = listen_stop(ep);
2668 		if (err)
2669 			goto done;
2670 		err = c4iw_wait_for_reply(&ep->com.dev->rdev, &ep->com.wr_wait,
2671 					  0, 0, __func__);
2672 	}
2673 	remove_handle(ep->com.dev, &ep->com.dev->stid_idr, ep->stid);
2674 	cxgb4_free_stid(ep->com.dev->rdev.lldi.tids, ep->stid, PF_INET);
2675 done:
2676 	cm_id->rem_ref(cm_id);
2677 	c4iw_put_ep(&ep->com);
2678 	return err;
2679 }
2680 
2681 int c4iw_ep_disconnect(struct c4iw_ep *ep, int abrupt, gfp_t gfp)
2682 {
2683 	int ret = 0;
2684 	int close = 0;
2685 	int fatal = 0;
2686 	struct c4iw_rdev *rdev;
2687 
2688 	mutex_lock(&ep->com.mutex);
2689 
2690 	PDBG("%s ep %p state %s, abrupt %d\n", __func__, ep,
2691 	     states[ep->com.state], abrupt);
2692 
2693 	rdev = &ep->com.dev->rdev;
2694 	if (c4iw_fatal_error(rdev)) {
2695 		fatal = 1;
2696 		close_complete_upcall(ep);
2697 		ep->com.state = DEAD;
2698 	}
2699 	switch (ep->com.state) {
2700 	case MPA_REQ_WAIT:
2701 	case MPA_REQ_SENT:
2702 	case MPA_REQ_RCVD:
2703 	case MPA_REP_SENT:
2704 	case FPDU_MODE:
2705 		close = 1;
2706 		if (abrupt)
2707 			ep->com.state = ABORTING;
2708 		else {
2709 			ep->com.state = CLOSING;
2710 			start_ep_timer(ep);
2711 		}
2712 		set_bit(CLOSE_SENT, &ep->com.flags);
2713 		break;
2714 	case CLOSING:
2715 		if (!test_and_set_bit(CLOSE_SENT, &ep->com.flags)) {
2716 			close = 1;
2717 			if (abrupt) {
2718 				stop_ep_timer(ep);
2719 				ep->com.state = ABORTING;
2720 			} else
2721 				ep->com.state = MORIBUND;
2722 		}
2723 		break;
2724 	case MORIBUND:
2725 	case ABORTING:
2726 	case DEAD:
2727 		PDBG("%s ignoring disconnect ep %p state %u\n",
2728 		     __func__, ep, ep->com.state);
2729 		break;
2730 	default:
2731 		BUG();
2732 		break;
2733 	}
2734 
2735 	if (close) {
2736 		if (abrupt) {
2737 			set_bit(EP_DISC_ABORT, &ep->com.history);
2738 			close_complete_upcall(ep);
2739 			ret = send_abort(ep, NULL, gfp);
2740 		} else {
2741 			set_bit(EP_DISC_CLOSE, &ep->com.history);
2742 			ret = send_halfclose(ep, gfp);
2743 		}
2744 		if (ret)
2745 			fatal = 1;
2746 	}
2747 	mutex_unlock(&ep->com.mutex);
2748 	if (fatal)
2749 		release_ep_resources(ep);
2750 	return ret;
2751 }
2752 
2753 static void active_ofld_conn_reply(struct c4iw_dev *dev, struct sk_buff *skb,
2754 			struct cpl_fw6_msg_ofld_connection_wr_rpl *req)
2755 {
2756 	struct c4iw_ep *ep;
2757 	int atid = be32_to_cpu(req->tid);
2758 
2759 	ep = (struct c4iw_ep *)lookup_atid(dev->rdev.lldi.tids, req->tid);
2760 	if (!ep)
2761 		return;
2762 
2763 	switch (req->retval) {
2764 	case FW_ENOMEM:
2765 		set_bit(ACT_RETRY_NOMEM, &ep->com.history);
2766 		if (ep->retry_count++ < ACT_OPEN_RETRY_COUNT) {
2767 			send_fw_act_open_req(ep, atid);
2768 			return;
2769 		}
2770 	case FW_EADDRINUSE:
2771 		set_bit(ACT_RETRY_INUSE, &ep->com.history);
2772 		if (ep->retry_count++ < ACT_OPEN_RETRY_COUNT) {
2773 			send_fw_act_open_req(ep, atid);
2774 			return;
2775 		}
2776 		break;
2777 	default:
2778 		pr_info("%s unexpected ofld conn wr retval %d\n",
2779 		       __func__, req->retval);
2780 		break;
2781 	}
2782 	pr_err("active ofld_connect_wr failure %d atid %d\n",
2783 	       req->retval, atid);
2784 	mutex_lock(&dev->rdev.stats.lock);
2785 	dev->rdev.stats.act_ofld_conn_fails++;
2786 	mutex_unlock(&dev->rdev.stats.lock);
2787 	connect_reply_upcall(ep, status2errno(req->retval));
2788 	state_set(&ep->com, DEAD);
2789 	remove_handle(dev, &dev->atid_idr, atid);
2790 	cxgb4_free_atid(dev->rdev.lldi.tids, atid);
2791 	dst_release(ep->dst);
2792 	cxgb4_l2t_release(ep->l2t);
2793 	c4iw_put_ep(&ep->com);
2794 }
2795 
2796 static void passive_ofld_conn_reply(struct c4iw_dev *dev, struct sk_buff *skb,
2797 			struct cpl_fw6_msg_ofld_connection_wr_rpl *req)
2798 {
2799 	struct sk_buff *rpl_skb;
2800 	struct cpl_pass_accept_req *cpl;
2801 	int ret;
2802 
2803 	rpl_skb = (struct sk_buff *)cpu_to_be64(req->cookie);
2804 	BUG_ON(!rpl_skb);
2805 	if (req->retval) {
2806 		PDBG("%s passive open failure %d\n", __func__, req->retval);
2807 		mutex_lock(&dev->rdev.stats.lock);
2808 		dev->rdev.stats.pas_ofld_conn_fails++;
2809 		mutex_unlock(&dev->rdev.stats.lock);
2810 		kfree_skb(rpl_skb);
2811 	} else {
2812 		cpl = (struct cpl_pass_accept_req *)cplhdr(rpl_skb);
2813 		OPCODE_TID(cpl) = htonl(MK_OPCODE_TID(CPL_PASS_ACCEPT_REQ,
2814 						      htonl(req->tid)));
2815 		ret = pass_accept_req(dev, rpl_skb);
2816 		if (!ret)
2817 			kfree_skb(rpl_skb);
2818 	}
2819 	return;
2820 }
2821 
2822 static int deferred_fw6_msg(struct c4iw_dev *dev, struct sk_buff *skb)
2823 {
2824 	struct cpl_fw6_msg *rpl = cplhdr(skb);
2825 	struct cpl_fw6_msg_ofld_connection_wr_rpl *req;
2826 
2827 	switch (rpl->type) {
2828 	case FW6_TYPE_CQE:
2829 		c4iw_ev_dispatch(dev, (struct t4_cqe *)&rpl->data[0]);
2830 		break;
2831 	case FW6_TYPE_OFLD_CONNECTION_WR_RPL:
2832 		req = (struct cpl_fw6_msg_ofld_connection_wr_rpl *)rpl->data;
2833 		switch (req->t_state) {
2834 		case TCP_SYN_SENT:
2835 			active_ofld_conn_reply(dev, skb, req);
2836 			break;
2837 		case TCP_SYN_RECV:
2838 			passive_ofld_conn_reply(dev, skb, req);
2839 			break;
2840 		default:
2841 			pr_err("%s unexpected ofld conn wr state %d\n",
2842 			       __func__, req->t_state);
2843 			break;
2844 		}
2845 		break;
2846 	}
2847 	return 0;
2848 }
2849 
2850 static void build_cpl_pass_accept_req(struct sk_buff *skb, int stid , u8 tos)
2851 {
2852 	u32 l2info;
2853 	u16 vlantag, len, hdr_len;
2854 	u8 intf;
2855 	struct cpl_rx_pkt *cpl = cplhdr(skb);
2856 	struct cpl_pass_accept_req *req;
2857 	struct tcp_options_received tmp_opt;
2858 
2859 	/* Store values from cpl_rx_pkt in temporary location. */
2860 	vlantag = cpl->vlan;
2861 	len = cpl->len;
2862 	l2info  = cpl->l2info;
2863 	hdr_len = cpl->hdr_len;
2864 	intf = cpl->iff;
2865 
2866 	__skb_pull(skb, sizeof(*req) + sizeof(struct rss_header));
2867 
2868 	/*
2869 	 * We need to parse the TCP options from SYN packet.
2870 	 * to generate cpl_pass_accept_req.
2871 	 */
2872 	memset(&tmp_opt, 0, sizeof(tmp_opt));
2873 	tcp_clear_options(&tmp_opt);
2874 	tcp_parse_options(skb, &tmp_opt, 0, 0, NULL);
2875 
2876 	req = (struct cpl_pass_accept_req *)__skb_push(skb, sizeof(*req));
2877 	memset(req, 0, sizeof(*req));
2878 	req->l2info = cpu_to_be16(V_SYN_INTF(intf) |
2879 			 V_SYN_MAC_IDX(G_RX_MACIDX(htonl(l2info))) |
2880 			 F_SYN_XACT_MATCH);
2881 	req->hdr_len = cpu_to_be32(V_SYN_RX_CHAN(G_RX_CHAN(htonl(l2info))) |
2882 				V_TCP_HDR_LEN(G_RX_TCPHDR_LEN(htons(hdr_len))) |
2883 				V_IP_HDR_LEN(G_RX_IPHDR_LEN(htons(hdr_len))) |
2884 				V_ETH_HDR_LEN(G_RX_ETHHDR_LEN(htonl(l2info))));
2885 	req->vlan = vlantag;
2886 	req->len = len;
2887 	req->tos_stid = cpu_to_be32(PASS_OPEN_TID(stid) |
2888 				    PASS_OPEN_TOS(tos));
2889 	req->tcpopt.mss = htons(tmp_opt.mss_clamp);
2890 	if (tmp_opt.wscale_ok)
2891 		req->tcpopt.wsf = tmp_opt.snd_wscale;
2892 	req->tcpopt.tstamp = tmp_opt.saw_tstamp;
2893 	if (tmp_opt.sack_ok)
2894 		req->tcpopt.sack = 1;
2895 	OPCODE_TID(req) = htonl(MK_OPCODE_TID(CPL_PASS_ACCEPT_REQ, 0));
2896 	return;
2897 }
2898 
2899 static void send_fw_pass_open_req(struct c4iw_dev *dev, struct sk_buff *skb,
2900 				  __be32 laddr, __be16 lport,
2901 				  __be32 raddr, __be16 rport,
2902 				  u32 rcv_isn, u32 filter, u16 window,
2903 				  u32 rss_qid, u8 port_id)
2904 {
2905 	struct sk_buff *req_skb;
2906 	struct fw_ofld_connection_wr *req;
2907 	struct cpl_pass_accept_req *cpl = cplhdr(skb);
2908 
2909 	req_skb = alloc_skb(sizeof(struct fw_ofld_connection_wr), GFP_KERNEL);
2910 	req = (struct fw_ofld_connection_wr *)__skb_put(req_skb, sizeof(*req));
2911 	memset(req, 0, sizeof(*req));
2912 	req->op_compl = htonl(V_WR_OP(FW_OFLD_CONNECTION_WR) | FW_WR_COMPL(1));
2913 	req->len16_pkd = htonl(FW_WR_LEN16(DIV_ROUND_UP(sizeof(*req), 16)));
2914 	req->le.version_cpl = htonl(F_FW_OFLD_CONNECTION_WR_CPL);
2915 	req->le.filter = filter;
2916 	req->le.lport = lport;
2917 	req->le.pport = rport;
2918 	req->le.u.ipv4.lip = laddr;
2919 	req->le.u.ipv4.pip = raddr;
2920 	req->tcb.rcv_nxt = htonl(rcv_isn + 1);
2921 	req->tcb.rcv_adv = htons(window);
2922 	req->tcb.t_state_to_astid =
2923 		 htonl(V_FW_OFLD_CONNECTION_WR_T_STATE(TCP_SYN_RECV) |
2924 			V_FW_OFLD_CONNECTION_WR_RCV_SCALE(cpl->tcpopt.wsf) |
2925 			V_FW_OFLD_CONNECTION_WR_ASTID(
2926 			GET_PASS_OPEN_TID(ntohl(cpl->tos_stid))));
2927 
2928 	/*
2929 	 * We store the qid in opt2 which will be used by the firmware
2930 	 * to send us the wr response.
2931 	 */
2932 	req->tcb.opt2 = htonl(V_RSS_QUEUE(rss_qid));
2933 
2934 	/*
2935 	 * We initialize the MSS index in TCB to 0xF.
2936 	 * So that when driver sends cpl_pass_accept_rpl
2937 	 * TCB picks up the correct value. If this was 0
2938 	 * TP will ignore any value > 0 for MSS index.
2939 	 */
2940 	req->tcb.opt0 = cpu_to_be64(V_MSS_IDX(0xF));
2941 	req->cookie = cpu_to_be64((u64)skb);
2942 
2943 	set_wr_txq(req_skb, CPL_PRIORITY_CONTROL, port_id);
2944 	cxgb4_ofld_send(dev->rdev.lldi.ports[0], req_skb);
2945 }
2946 
2947 /*
2948  * Handler for CPL_RX_PKT message. Need to handle cpl_rx_pkt
2949  * messages when a filter is being used instead of server to
2950  * redirect a syn packet. When packets hit filter they are redirected
2951  * to the offload queue and driver tries to establish the connection
2952  * using firmware work request.
2953  */
2954 static int rx_pkt(struct c4iw_dev *dev, struct sk_buff *skb)
2955 {
2956 	int stid;
2957 	unsigned int filter;
2958 	struct ethhdr *eh = NULL;
2959 	struct vlan_ethhdr *vlan_eh = NULL;
2960 	struct iphdr *iph;
2961 	struct tcphdr *tcph;
2962 	struct rss_header *rss = (void *)skb->data;
2963 	struct cpl_rx_pkt *cpl = (void *)skb->data;
2964 	struct cpl_pass_accept_req *req = (void *)(rss + 1);
2965 	struct l2t_entry *e;
2966 	struct dst_entry *dst;
2967 	struct rtable *rt;
2968 	struct c4iw_ep *lep;
2969 	u16 window;
2970 	struct port_info *pi;
2971 	struct net_device *pdev;
2972 	u16 rss_qid;
2973 	int step;
2974 	u32 tx_chan;
2975 	struct neighbour *neigh;
2976 
2977 	/* Drop all non-SYN packets */
2978 	if (!(cpl->l2info & cpu_to_be32(F_RXF_SYN)))
2979 		goto reject;
2980 
2981 	/*
2982 	 * Drop all packets which did not hit the filter.
2983 	 * Unlikely to happen.
2984 	 */
2985 	if (!(rss->filter_hit && rss->filter_tid))
2986 		goto reject;
2987 
2988 	/*
2989 	 * Calculate the server tid from filter hit index from cpl_rx_pkt.
2990 	 */
2991 	stid = cpu_to_be32(rss->hash_val) - dev->rdev.lldi.tids->sftid_base
2992 					  + dev->rdev.lldi.tids->nstids;
2993 
2994 	lep = (struct c4iw_ep *)lookup_stid(dev->rdev.lldi.tids, stid);
2995 	if (!lep) {
2996 		PDBG("%s connect request on invalid stid %d\n", __func__, stid);
2997 		goto reject;
2998 	}
2999 
3000 	if (G_RX_ETHHDR_LEN(ntohl(cpl->l2info)) == ETH_HLEN) {
3001 		eh = (struct ethhdr *)(req + 1);
3002 		iph = (struct iphdr *)(eh + 1);
3003 	} else {
3004 		vlan_eh = (struct vlan_ethhdr *)(req + 1);
3005 		iph = (struct iphdr *)(vlan_eh + 1);
3006 		skb->vlan_tci = ntohs(cpl->vlan);
3007 	}
3008 
3009 	if (iph->version != 0x4)
3010 		goto reject;
3011 
3012 	tcph = (struct tcphdr *)(iph + 1);
3013 	skb_set_network_header(skb, (void *)iph - (void *)rss);
3014 	skb_set_transport_header(skb, (void *)tcph - (void *)rss);
3015 	skb_get(skb);
3016 
3017 	PDBG("%s lip 0x%x lport %u pip 0x%x pport %u tos %d\n", __func__,
3018 	     ntohl(iph->daddr), ntohs(tcph->dest), ntohl(iph->saddr),
3019 	     ntohs(tcph->source), iph->tos);
3020 
3021 	rt = find_route(dev, iph->daddr, iph->saddr, tcph->dest, tcph->source,
3022 			iph->tos);
3023 	if (!rt) {
3024 		pr_err("%s - failed to find dst entry!\n",
3025 		       __func__);
3026 		goto reject;
3027 	}
3028 	dst = &rt->dst;
3029 	neigh = dst_neigh_lookup_skb(dst, skb);
3030 
3031 	if (neigh->dev->flags & IFF_LOOPBACK) {
3032 		pdev = ip_dev_find(&init_net, iph->daddr);
3033 		e = cxgb4_l2t_get(dev->rdev.lldi.l2t, neigh,
3034 				    pdev, 0);
3035 		pi = (struct port_info *)netdev_priv(pdev);
3036 		tx_chan = cxgb4_port_chan(pdev);
3037 		dev_put(pdev);
3038 	} else {
3039 		e = cxgb4_l2t_get(dev->rdev.lldi.l2t, neigh,
3040 					neigh->dev, 0);
3041 		pi = (struct port_info *)netdev_priv(neigh->dev);
3042 		tx_chan = cxgb4_port_chan(neigh->dev);
3043 	}
3044 	if (!e) {
3045 		pr_err("%s - failed to allocate l2t entry!\n",
3046 		       __func__);
3047 		goto free_dst;
3048 	}
3049 
3050 	step = dev->rdev.lldi.nrxq / dev->rdev.lldi.nchan;
3051 	rss_qid = dev->rdev.lldi.rxq_ids[pi->port_id * step];
3052 	window = htons(tcph->window);
3053 
3054 	/* Calcuate filter portion for LE region. */
3055 	filter = cpu_to_be32(select_ntuple(dev, dst, e));
3056 
3057 	/*
3058 	 * Synthesize the cpl_pass_accept_req. We have everything except the
3059 	 * TID. Once firmware sends a reply with TID we update the TID field
3060 	 * in cpl and pass it through the regular cpl_pass_accept_req path.
3061 	 */
3062 	build_cpl_pass_accept_req(skb, stid, iph->tos);
3063 	send_fw_pass_open_req(dev, skb, iph->daddr, tcph->dest, iph->saddr,
3064 			      tcph->source, ntohl(tcph->seq), filter, window,
3065 			      rss_qid, pi->port_id);
3066 	cxgb4_l2t_release(e);
3067 free_dst:
3068 	dst_release(dst);
3069 reject:
3070 	return 0;
3071 }
3072 
3073 /*
3074  * These are the real handlers that are called from a
3075  * work queue.
3076  */
3077 static c4iw_handler_func work_handlers[NUM_CPL_CMDS] = {
3078 	[CPL_ACT_ESTABLISH] = act_establish,
3079 	[CPL_ACT_OPEN_RPL] = act_open_rpl,
3080 	[CPL_RX_DATA] = rx_data,
3081 	[CPL_ABORT_RPL_RSS] = abort_rpl,
3082 	[CPL_ABORT_RPL] = abort_rpl,
3083 	[CPL_PASS_OPEN_RPL] = pass_open_rpl,
3084 	[CPL_CLOSE_LISTSRV_RPL] = close_listsrv_rpl,
3085 	[CPL_PASS_ACCEPT_REQ] = pass_accept_req,
3086 	[CPL_PASS_ESTABLISH] = pass_establish,
3087 	[CPL_PEER_CLOSE] = peer_close,
3088 	[CPL_ABORT_REQ_RSS] = peer_abort,
3089 	[CPL_CLOSE_CON_RPL] = close_con_rpl,
3090 	[CPL_RDMA_TERMINATE] = terminate,
3091 	[CPL_FW4_ACK] = fw4_ack,
3092 	[CPL_FW6_MSG] = deferred_fw6_msg,
3093 	[CPL_RX_PKT] = rx_pkt
3094 };
3095 
3096 static void process_timeout(struct c4iw_ep *ep)
3097 {
3098 	struct c4iw_qp_attributes attrs;
3099 	int abort = 1;
3100 
3101 	mutex_lock(&ep->com.mutex);
3102 	PDBG("%s ep %p tid %u state %d\n", __func__, ep, ep->hwtid,
3103 	     ep->com.state);
3104 	set_bit(TIMEDOUT, &ep->com.history);
3105 	switch (ep->com.state) {
3106 	case MPA_REQ_SENT:
3107 		__state_set(&ep->com, ABORTING);
3108 		connect_reply_upcall(ep, -ETIMEDOUT);
3109 		break;
3110 	case MPA_REQ_WAIT:
3111 		__state_set(&ep->com, ABORTING);
3112 		break;
3113 	case CLOSING:
3114 	case MORIBUND:
3115 		if (ep->com.cm_id && ep->com.qp) {
3116 			attrs.next_state = C4IW_QP_STATE_ERROR;
3117 			c4iw_modify_qp(ep->com.qp->rhp,
3118 				     ep->com.qp, C4IW_QP_ATTR_NEXT_STATE,
3119 				     &attrs, 1);
3120 		}
3121 		__state_set(&ep->com, ABORTING);
3122 		break;
3123 	default:
3124 		WARN(1, "%s unexpected state ep %p tid %u state %u\n",
3125 			__func__, ep, ep->hwtid, ep->com.state);
3126 		abort = 0;
3127 	}
3128 	mutex_unlock(&ep->com.mutex);
3129 	if (abort)
3130 		abort_connection(ep, NULL, GFP_KERNEL);
3131 	c4iw_put_ep(&ep->com);
3132 }
3133 
3134 static void process_timedout_eps(void)
3135 {
3136 	struct c4iw_ep *ep;
3137 
3138 	spin_lock_irq(&timeout_lock);
3139 	while (!list_empty(&timeout_list)) {
3140 		struct list_head *tmp;
3141 
3142 		tmp = timeout_list.next;
3143 		list_del(tmp);
3144 		spin_unlock_irq(&timeout_lock);
3145 		ep = list_entry(tmp, struct c4iw_ep, entry);
3146 		process_timeout(ep);
3147 		spin_lock_irq(&timeout_lock);
3148 	}
3149 	spin_unlock_irq(&timeout_lock);
3150 }
3151 
3152 static void process_work(struct work_struct *work)
3153 {
3154 	struct sk_buff *skb = NULL;
3155 	struct c4iw_dev *dev;
3156 	struct cpl_act_establish *rpl;
3157 	unsigned int opcode;
3158 	int ret;
3159 
3160 	while ((skb = skb_dequeue(&rxq))) {
3161 		rpl = cplhdr(skb);
3162 		dev = *((struct c4iw_dev **) (skb->cb + sizeof(void *)));
3163 		opcode = rpl->ot.opcode;
3164 
3165 		BUG_ON(!work_handlers[opcode]);
3166 		ret = work_handlers[opcode](dev, skb);
3167 		if (!ret)
3168 			kfree_skb(skb);
3169 	}
3170 	process_timedout_eps();
3171 }
3172 
3173 static DECLARE_WORK(skb_work, process_work);
3174 
3175 static void ep_timeout(unsigned long arg)
3176 {
3177 	struct c4iw_ep *ep = (struct c4iw_ep *)arg;
3178 
3179 	spin_lock(&timeout_lock);
3180 	list_add_tail(&ep->entry, &timeout_list);
3181 	spin_unlock(&timeout_lock);
3182 	queue_work(workq, &skb_work);
3183 }
3184 
3185 /*
3186  * All the CM events are handled on a work queue to have a safe context.
3187  */
3188 static int sched(struct c4iw_dev *dev, struct sk_buff *skb)
3189 {
3190 
3191 	/*
3192 	 * Save dev in the skb->cb area.
3193 	 */
3194 	*((struct c4iw_dev **) (skb->cb + sizeof(void *))) = dev;
3195 
3196 	/*
3197 	 * Queue the skb and schedule the worker thread.
3198 	 */
3199 	skb_queue_tail(&rxq, skb);
3200 	queue_work(workq, &skb_work);
3201 	return 0;
3202 }
3203 
3204 static int set_tcb_rpl(struct c4iw_dev *dev, struct sk_buff *skb)
3205 {
3206 	struct cpl_set_tcb_rpl *rpl = cplhdr(skb);
3207 
3208 	if (rpl->status != CPL_ERR_NONE) {
3209 		printk(KERN_ERR MOD "Unexpected SET_TCB_RPL status %u "
3210 		       "for tid %u\n", rpl->status, GET_TID(rpl));
3211 	}
3212 	kfree_skb(skb);
3213 	return 0;
3214 }
3215 
3216 static int fw6_msg(struct c4iw_dev *dev, struct sk_buff *skb)
3217 {
3218 	struct cpl_fw6_msg *rpl = cplhdr(skb);
3219 	struct c4iw_wr_wait *wr_waitp;
3220 	int ret;
3221 
3222 	PDBG("%s type %u\n", __func__, rpl->type);
3223 
3224 	switch (rpl->type) {
3225 	case FW6_TYPE_WR_RPL:
3226 		ret = (int)((be64_to_cpu(rpl->data[0]) >> 8) & 0xff);
3227 		wr_waitp = (struct c4iw_wr_wait *)(__force unsigned long) rpl->data[1];
3228 		PDBG("%s wr_waitp %p ret %u\n", __func__, wr_waitp, ret);
3229 		if (wr_waitp)
3230 			c4iw_wake_up(wr_waitp, ret ? -ret : 0);
3231 		kfree_skb(skb);
3232 		break;
3233 	case FW6_TYPE_CQE:
3234 	case FW6_TYPE_OFLD_CONNECTION_WR_RPL:
3235 		sched(dev, skb);
3236 		break;
3237 	default:
3238 		printk(KERN_ERR MOD "%s unexpected fw6 msg type %u\n", __func__,
3239 		       rpl->type);
3240 		kfree_skb(skb);
3241 		break;
3242 	}
3243 	return 0;
3244 }
3245 
3246 static int peer_abort_intr(struct c4iw_dev *dev, struct sk_buff *skb)
3247 {
3248 	struct cpl_abort_req_rss *req = cplhdr(skb);
3249 	struct c4iw_ep *ep;
3250 	struct tid_info *t = dev->rdev.lldi.tids;
3251 	unsigned int tid = GET_TID(req);
3252 
3253 	ep = lookup_tid(t, tid);
3254 	if (!ep) {
3255 		printk(KERN_WARNING MOD
3256 		       "Abort on non-existent endpoint, tid %d\n", tid);
3257 		kfree_skb(skb);
3258 		return 0;
3259 	}
3260 	if (is_neg_adv_abort(req->status)) {
3261 		PDBG("%s neg_adv_abort ep %p tid %u\n", __func__, ep,
3262 		     ep->hwtid);
3263 		kfree_skb(skb);
3264 		return 0;
3265 	}
3266 	PDBG("%s ep %p tid %u state %u\n", __func__, ep, ep->hwtid,
3267 	     ep->com.state);
3268 
3269 	/*
3270 	 * Wake up any threads in rdma_init() or rdma_fini().
3271 	 */
3272 	c4iw_wake_up(&ep->com.wr_wait, -ECONNRESET);
3273 	sched(dev, skb);
3274 	return 0;
3275 }
3276 
3277 /*
3278  * Most upcalls from the T4 Core go to sched() to
3279  * schedule the processing on a work queue.
3280  */
3281 c4iw_handler_func c4iw_handlers[NUM_CPL_CMDS] = {
3282 	[CPL_ACT_ESTABLISH] = sched,
3283 	[CPL_ACT_OPEN_RPL] = sched,
3284 	[CPL_RX_DATA] = sched,
3285 	[CPL_ABORT_RPL_RSS] = sched,
3286 	[CPL_ABORT_RPL] = sched,
3287 	[CPL_PASS_OPEN_RPL] = sched,
3288 	[CPL_CLOSE_LISTSRV_RPL] = sched,
3289 	[CPL_PASS_ACCEPT_REQ] = sched,
3290 	[CPL_PASS_ESTABLISH] = sched,
3291 	[CPL_PEER_CLOSE] = sched,
3292 	[CPL_CLOSE_CON_RPL] = sched,
3293 	[CPL_ABORT_REQ_RSS] = peer_abort_intr,
3294 	[CPL_RDMA_TERMINATE] = sched,
3295 	[CPL_FW4_ACK] = sched,
3296 	[CPL_SET_TCB_RPL] = set_tcb_rpl,
3297 	[CPL_FW6_MSG] = fw6_msg,
3298 	[CPL_RX_PKT] = sched
3299 };
3300 
3301 int __init c4iw_cm_init(void)
3302 {
3303 	spin_lock_init(&timeout_lock);
3304 	skb_queue_head_init(&rxq);
3305 
3306 	workq = create_singlethread_workqueue("iw_cxgb4");
3307 	if (!workq)
3308 		return -ENOMEM;
3309 
3310 	return 0;
3311 }
3312 
3313 void __exit c4iw_cm_term(void)
3314 {
3315 	WARN_ON(!list_empty(&timeout_list));
3316 	flush_workqueue(workq);
3317 	destroy_workqueue(workq);
3318 }
3319