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Staging: zram: fix up some sysfs attribute permissions
[zen-stable.git] / drivers / infiniband / hw / cxgb4 / cm.c
blob0dc62b1438bee2b52483381db9708d5a1f5c837e
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
42 #include <net/neighbour.h>
43 #include <net/netevent.h>
44 #include <net/route.h>
45
46 #include "iw_cxgb4.h"
47
48 static char *states[] = {
49 "idle",
50 "listen",
51 "connecting",
52 "mpa_wait_req",
53 "mpa_req_sent",
54 "mpa_req_rcvd",
55 "mpa_rep_sent",
56 "fpdu_mode",
57 "aborting",
58 "closing",
59 "moribund",
60 "dead",
61 NULL,
62 };
63
64 static int dack_mode;
65 module_param(dack_mode, int, 0644);
66 MODULE_PARM_DESC(dack_mode, "Delayed ack mode (default=0)");
67
68 int c4iw_max_read_depth = 8;
69 module_param(c4iw_max_read_depth, int, 0644);
70 MODULE_PARM_DESC(c4iw_max_read_depth, "Per-connection max ORD/IRD (default=8)");
71
72 static int enable_tcp_timestamps;
73 module_param(enable_tcp_timestamps, int, 0644);
74 MODULE_PARM_DESC(enable_tcp_timestamps, "Enable tcp timestamps (default=0)");
75
76 static int enable_tcp_sack;
77 module_param(enable_tcp_sack, int, 0644);
78 MODULE_PARM_DESC(enable_tcp_sack, "Enable tcp SACK (default=0)");
79
80 static int enable_tcp_window_scaling = 1;
81 module_param(enable_tcp_window_scaling, int, 0644);
82 MODULE_PARM_DESC(enable_tcp_window_scaling,
83 "Enable tcp window scaling (default=1)");
84
85 int c4iw_debug;
86 module_param(c4iw_debug, int, 0644);
87 MODULE_PARM_DESC(c4iw_debug, "Enable debug logging (default=0)");
88
89 static int peer2peer;
90 module_param(peer2peer, int, 0644);
91 MODULE_PARM_DESC(peer2peer, "Support peer2peer ULPs (default=0)");
92
93 static int p2p_type = FW_RI_INIT_P2PTYPE_READ_REQ;
94 module_param(p2p_type, int, 0644);
95 MODULE_PARM_DESC(p2p_type, "RDMAP opcode to use for the RTR message: "
96 "1=RDMA_READ 0=RDMA_WRITE (default 1)");
97
98 static int ep_timeout_secs = 60;
99 module_param(ep_timeout_secs, int, 0644);
100 MODULE_PARM_DESC(ep_timeout_secs, "CM Endpoint operation timeout "
101 "in seconds (default=60)");
102
103 static int mpa_rev = 1;
104 module_param(mpa_rev, int, 0644);
105 MODULE_PARM_DESC(mpa_rev, "MPA Revision, 0 supports amso1100, "
106 "1 is spec compliant. (default=1)");
107
108 static int markers_enabled;
109 module_param(markers_enabled, int, 0644);
110 MODULE_PARM_DESC(markers_enabled, "Enable MPA MARKERS (default(0)=disabled)");
111
112 static int crc_enabled = 1;
113 module_param(crc_enabled, int, 0644);
114 MODULE_PARM_DESC(crc_enabled, "Enable MPA CRC (default(1)=enabled)");
115
116 static int rcv_win = 256 * 1024;
117 module_param(rcv_win, int, 0644);
118 MODULE_PARM_DESC(rcv_win, "TCP receive window in bytes (default=256KB)");
119
120 static int snd_win = 128 * 1024;
121 module_param(snd_win, int, 0644);
122 MODULE_PARM_DESC(snd_win, "TCP send window in bytes (default=128KB)");
123
124 static struct workqueue_struct *workq;
125
126 static struct sk_buff_head rxq;
127
128 static struct sk_buff *get_skb(struct sk_buff *skb, int len, gfp_t gfp);
129 static void ep_timeout(unsigned long arg);
130 static void connect_reply_upcall(struct c4iw_ep *ep, int status);
131
132 static LIST_HEAD(timeout_list);
133 static spinlock_t timeout_lock;
134
135 static void start_ep_timer(struct c4iw_ep *ep)
136 {
137 PDBG("%s ep %p\n", __func__, ep);
138 if (timer_pending(&ep->timer)) {
139 PDBG("%s stopped / restarted timer ep %p\n", __func__, ep);
140 del_timer_sync(&ep->timer);
141 } else
142 c4iw_get_ep(&ep->com);
143 ep->timer.expires = jiffies + ep_timeout_secs * HZ;
144 ep->timer.data = (unsigned long)ep;
145 ep->timer.function = ep_timeout;
146 add_timer(&ep->timer);
147 }
148
149 static void stop_ep_timer(struct c4iw_ep *ep)
150 {
151 PDBG("%s ep %p\n", __func__, ep);
152 if (!timer_pending(&ep->timer)) {
153 printk(KERN_ERR "%s timer stopped when its not running! "
154 "ep %p state %u\n", __func__, ep, ep->com.state);
155 WARN_ON(1);
156 return;
157 }
158 del_timer_sync(&ep->timer);
159 c4iw_put_ep(&ep->com);
160 }
161
162 static int c4iw_l2t_send(struct c4iw_rdev *rdev, struct sk_buff *skb,
163 struct l2t_entry *l2e)
164 {
165 int error = 0;
166
167 if (c4iw_fatal_error(rdev)) {
168 kfree_skb(skb);
169 PDBG("%s - device in error state - dropping\n", __func__);
170 return -EIO;
171 }
172 error = cxgb4_l2t_send(rdev->lldi.ports[0], skb, l2e);
173 if (error < 0)
174 kfree_skb(skb);
175 return error < 0 ? error : 0;
176 }
177
178 int c4iw_ofld_send(struct c4iw_rdev *rdev, struct sk_buff *skb)
179 {
180 int error = 0;
181
182 if (c4iw_fatal_error(rdev)) {
183 kfree_skb(skb);
184 PDBG("%s - device in error state - dropping\n", __func__);
185 return -EIO;
186 }
187 error = cxgb4_ofld_send(rdev->lldi.ports[0], skb);
188 if (error < 0)
189 kfree_skb(skb);
190 return error < 0 ? error : 0;
191 }
192
193 static void release_tid(struct c4iw_rdev *rdev, u32 hwtid, struct sk_buff *skb)
194 {
195 struct cpl_tid_release *req;
196
197 skb = get_skb(skb, sizeof *req, GFP_KERNEL);
198 if (!skb)
199 return;
200 req = (struct cpl_tid_release *) skb_put(skb, sizeof(*req));
201 INIT_TP_WR(req, hwtid);
202 OPCODE_TID(req) = cpu_to_be32(MK_OPCODE_TID(CPL_TID_RELEASE, hwtid));
203 set_wr_txq(skb, CPL_PRIORITY_SETUP, 0);
204 c4iw_ofld_send(rdev, skb);
205 return;
206 }
207
208 static void set_emss(struct c4iw_ep *ep, u16 opt)
209 {
210 ep->emss = ep->com.dev->rdev.lldi.mtus[GET_TCPOPT_MSS(opt)] - 40;
211 ep->mss = ep->emss;
212 if (GET_TCPOPT_TSTAMP(opt))
213 ep->emss -= 12;
214 if (ep->emss < 128)
215 ep->emss = 128;
216 PDBG("%s mss_idx %u mss %u emss=%u\n", __func__, GET_TCPOPT_MSS(opt),
217 ep->mss, ep->emss);
218 }
219
220 static enum c4iw_ep_state state_read(struct c4iw_ep_common *epc)
221 {
222 enum c4iw_ep_state state;
223
224 mutex_lock(&epc->mutex);
225 state = epc->state;
226 mutex_unlock(&epc->mutex);
227 return state;
228 }
229
230 static void __state_set(struct c4iw_ep_common *epc, enum c4iw_ep_state new)
231 {
232 epc->state = new;
233 }
234
235 static void state_set(struct c4iw_ep_common *epc, enum c4iw_ep_state new)
236 {
237 mutex_lock(&epc->mutex);
238 PDBG("%s - %s -> %s\n", __func__, states[epc->state], states[new]);
239 __state_set(epc, new);
240 mutex_unlock(&epc->mutex);
241 return;
242 }
243
244 static void *alloc_ep(int size, gfp_t gfp)
245 {
246 struct c4iw_ep_common *epc;
247
248 epc = kzalloc(size, gfp);
249 if (epc) {
250 kref_init(&epc->kref);
251 mutex_init(&epc->mutex);
252 c4iw_init_wr_wait(&epc->wr_wait);
253 }
254 PDBG("%s alloc ep %p\n", __func__, epc);
255 return epc;
256 }
257
258 void _c4iw_free_ep(struct kref *kref)
259 {
260 struct c4iw_ep *ep;
261
262 ep = container_of(kref, struct c4iw_ep, com.kref);
263 PDBG("%s ep %p state %s\n", __func__, ep, states[state_read(&ep->com)]);
264 if (test_bit(RELEASE_RESOURCES, &ep->com.flags)) {
265 cxgb4_remove_tid(ep->com.dev->rdev.lldi.tids, 0, ep->hwtid);
266 dst_release(ep->dst);
267 cxgb4_l2t_release(ep->l2t);
268 }
269 kfree(ep);
270 }
271
272 static void release_ep_resources(struct c4iw_ep *ep)
273 {
274 set_bit(RELEASE_RESOURCES, &ep->com.flags);
275 c4iw_put_ep(&ep->com);
276 }
277
278 static int status2errno(int status)
279 {
280 switch (status) {
281 case CPL_ERR_NONE:
282 return 0;
283 case CPL_ERR_CONN_RESET:
284 return -ECONNRESET;
285 case CPL_ERR_ARP_MISS:
286 return -EHOSTUNREACH;
287 case CPL_ERR_CONN_TIMEDOUT:
288 return -ETIMEDOUT;
289 case CPL_ERR_TCAM_FULL:
290 return -ENOMEM;
291 case CPL_ERR_CONN_EXIST:
292 return -EADDRINUSE;
293 default:
294 return -EIO;
295 }
296 }
297
298 /*
299 * Try and reuse skbs already allocated...
300 */
301 static struct sk_buff *get_skb(struct sk_buff *skb, int len, gfp_t gfp)
302 {
303 if (skb && !skb_is_nonlinear(skb) && !skb_cloned(skb)) {
304 skb_trim(skb, 0);
305 skb_get(skb);
306 skb_reset_transport_header(skb);
307 } else {
308 skb = alloc_skb(len, gfp);
309 }
310 return skb;
311 }
312
313 static struct rtable *find_route(struct c4iw_dev *dev, __be32 local_ip,
314 __be32 peer_ip, __be16 local_port,
315 __be16 peer_port, u8 tos)
316 {
317 struct rtable *rt;
318 struct flowi fl = {
319 .oif = 0,
320 .nl_u = {
321 .ip4_u = {
322 .daddr = peer_ip,
323 .saddr = local_ip,
324 .tos = tos}
325 },
326 .proto = IPPROTO_TCP,
327 .uli_u = {
328 .ports = {
329 .sport = local_port,
330 .dport = peer_port}
331 }
332 };
333
334 if (ip_route_output_flow(&init_net, &rt, &fl, NULL, 0))
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(0);
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 static int send_connect(struct c4iw_ep *ep)
456 {
457 struct cpl_act_open_req *req;
458 struct sk_buff *skb;
459 u64 opt0;
460 u32 opt2;
461 unsigned int mtu_idx;
462 int wscale;
463 int wrlen = roundup(sizeof *req, 16);
464
465 PDBG("%s ep %p atid %u\n", __func__, ep, ep->atid);
466
467 skb = get_skb(NULL, wrlen, GFP_KERNEL);
468 if (!skb) {
469 printk(KERN_ERR MOD "%s - failed to alloc skb.\n",
470 __func__);
471 return -ENOMEM;
472 }
473 set_wr_txq(skb, CPL_PRIORITY_SETUP, ep->ctrlq_idx);
474
475 cxgb4_best_mtu(ep->com.dev->rdev.lldi.mtus, ep->mtu, &mtu_idx);
476 wscale = compute_wscale(rcv_win);
477 opt0 = KEEP_ALIVE(1) |
478 DELACK(1) |
479 WND_SCALE(wscale) |
480 MSS_IDX(mtu_idx) |
481 L2T_IDX(ep->l2t->idx) |
482 TX_CHAN(ep->tx_chan) |
483 SMAC_SEL(ep->smac_idx) |
484 DSCP(ep->tos) |
485 RCV_BUFSIZ(rcv_win>>10);
486 opt2 = RX_CHANNEL(0) |
487 RSS_QUEUE_VALID | RSS_QUEUE(ep->rss_qid);
488 if (enable_tcp_timestamps)
489 opt2 |= TSTAMPS_EN(1);
490 if (enable_tcp_sack)
491 opt2 |= SACK_EN(1);
492 if (wscale && enable_tcp_window_scaling)
493 opt2 |= WND_SCALE_EN(1);
494 t4_set_arp_err_handler(skb, NULL, act_open_req_arp_failure);
495
496 req = (struct cpl_act_open_req *) skb_put(skb, wrlen);
497 INIT_TP_WR(req, 0);
498 OPCODE_TID(req) = cpu_to_be32(
499 MK_OPCODE_TID(CPL_ACT_OPEN_REQ, ((ep->rss_qid<<14)|ep->atid)));
500 req->local_port = ep->com.local_addr.sin_port;
501 req->peer_port = ep->com.remote_addr.sin_port;
502 req->local_ip = ep->com.local_addr.sin_addr.s_addr;
503 req->peer_ip = ep->com.remote_addr.sin_addr.s_addr;
504 req->opt0 = cpu_to_be64(opt0);
505 req->params = 0;
506 req->opt2 = cpu_to_be32(opt2);
507 return c4iw_l2t_send(&ep->com.dev->rdev, skb, ep->l2t);
508 }
509
510 static void send_mpa_req(struct c4iw_ep *ep, struct sk_buff *skb)
511 {
512 int mpalen, wrlen;
513 struct fw_ofld_tx_data_wr *req;
514 struct mpa_message *mpa;
515
516 PDBG("%s ep %p tid %u pd_len %d\n", __func__, ep, ep->hwtid, ep->plen);
517
518 BUG_ON(skb_cloned(skb));
519
520 mpalen = sizeof(*mpa) + ep->plen;
521 wrlen = roundup(mpalen + sizeof *req, 16);
522 skb = get_skb(skb, wrlen, GFP_KERNEL);
523 if (!skb) {
524 connect_reply_upcall(ep, -ENOMEM);
525 return;
526 }
527 set_wr_txq(skb, CPL_PRIORITY_DATA, ep->txq_idx);
528
529 req = (struct fw_ofld_tx_data_wr *)skb_put(skb, wrlen);
530 memset(req, 0, wrlen);
531 req->op_to_immdlen = cpu_to_be32(
532 FW_WR_OP(FW_OFLD_TX_DATA_WR) |
533 FW_WR_COMPL(1) |
534 FW_WR_IMMDLEN(mpalen));
535 req->flowid_len16 = cpu_to_be32(
536 FW_WR_FLOWID(ep->hwtid) |
537 FW_WR_LEN16(wrlen >> 4));
538 req->plen = cpu_to_be32(mpalen);
539 req->tunnel_to_proxy = cpu_to_be32(
540 FW_OFLD_TX_DATA_WR_FLUSH(1) |
541 FW_OFLD_TX_DATA_WR_SHOVE(1));
542
543 mpa = (struct mpa_message *)(req + 1);
544 memcpy(mpa->key, MPA_KEY_REQ, sizeof(mpa->key));
545 mpa->flags = (crc_enabled ? MPA_CRC : 0) |
546 (markers_enabled ? MPA_MARKERS : 0);
547 mpa->private_data_size = htons(ep->plen);
548 mpa->revision = mpa_rev;
549
550 if (ep->plen)
551 memcpy(mpa->private_data, ep->mpa_pkt + sizeof(*mpa), ep->plen);
552
553 /*
554 * Reference the mpa skb. This ensures the data area
555 * will remain in memory until the hw acks the tx.
556 * Function fw4_ack() will deref it.
557 */
558 skb_get(skb);
559 t4_set_arp_err_handler(skb, NULL, arp_failure_discard);
560 BUG_ON(ep->mpa_skb);
561 ep->mpa_skb = skb;
562 c4iw_l2t_send(&ep->com.dev->rdev, skb, ep->l2t);
563 start_ep_timer(ep);
564 state_set(&ep->com, MPA_REQ_SENT);
565 ep->mpa_attr.initiator = 1;
566 return;
567 }
568
569 static int send_mpa_reject(struct c4iw_ep *ep, const void *pdata, u8 plen)
570 {
571 int mpalen, wrlen;
572 struct fw_ofld_tx_data_wr *req;
573 struct mpa_message *mpa;
574 struct sk_buff *skb;
575
576 PDBG("%s ep %p tid %u pd_len %d\n", __func__, ep, ep->hwtid, ep->plen);
577
578 mpalen = sizeof(*mpa) + plen;
579 wrlen = roundup(mpalen + sizeof *req, 16);
580
581 skb = get_skb(NULL, wrlen, GFP_KERNEL);
582 if (!skb) {
583 printk(KERN_ERR MOD "%s - cannot alloc skb!\n", __func__);
584 return -ENOMEM;
585 }
586 set_wr_txq(skb, CPL_PRIORITY_DATA, ep->txq_idx);
587
588 req = (struct fw_ofld_tx_data_wr *)skb_put(skb, wrlen);
589 memset(req, 0, wrlen);
590 req->op_to_immdlen = cpu_to_be32(
591 FW_WR_OP(FW_OFLD_TX_DATA_WR) |
592 FW_WR_COMPL(1) |
593 FW_WR_IMMDLEN(mpalen));
594 req->flowid_len16 = cpu_to_be32(
595 FW_WR_FLOWID(ep->hwtid) |
596 FW_WR_LEN16(wrlen >> 4));
597 req->plen = cpu_to_be32(mpalen);
598 req->tunnel_to_proxy = cpu_to_be32(
599 FW_OFLD_TX_DATA_WR_FLUSH(1) |
600 FW_OFLD_TX_DATA_WR_SHOVE(1));
601
602 mpa = (struct mpa_message *)(req + 1);
603 memset(mpa, 0, sizeof(*mpa));
604 memcpy(mpa->key, MPA_KEY_REP, sizeof(mpa->key));
605 mpa->flags = MPA_REJECT;
606 mpa->revision = mpa_rev;
607 mpa->private_data_size = htons(plen);
608 if (plen)
609 memcpy(mpa->private_data, pdata, plen);
610
611 /*
612 * Reference the mpa skb again. This ensures the data area
613 * will remain in memory until the hw acks the tx.
614 * Function fw4_ack() will deref it.
615 */
616 skb_get(skb);
617 set_wr_txq(skb, CPL_PRIORITY_DATA, ep->txq_idx);
618 t4_set_arp_err_handler(skb, NULL, arp_failure_discard);
619 BUG_ON(ep->mpa_skb);
620 ep->mpa_skb = skb;
621 return c4iw_l2t_send(&ep->com.dev->rdev, skb, ep->l2t);
622 }
623
624 static int send_mpa_reply(struct c4iw_ep *ep, const void *pdata, u8 plen)
625 {
626 int mpalen, wrlen;
627 struct fw_ofld_tx_data_wr *req;
628 struct mpa_message *mpa;
629 struct sk_buff *skb;
630
631 PDBG("%s ep %p tid %u pd_len %d\n", __func__, ep, ep->hwtid, ep->plen);
632
633 mpalen = sizeof(*mpa) + plen;
634 wrlen = roundup(mpalen + sizeof *req, 16);
635
636 skb = get_skb(NULL, wrlen, GFP_KERNEL);
637 if (!skb) {
638 printk(KERN_ERR MOD "%s - cannot alloc skb!\n", __func__);
639 return -ENOMEM;
640 }
641 set_wr_txq(skb, CPL_PRIORITY_DATA, ep->txq_idx);
642
643 req = (struct fw_ofld_tx_data_wr *) skb_put(skb, wrlen);
644 memset(req, 0, wrlen);
645 req->op_to_immdlen = cpu_to_be32(
646 FW_WR_OP(FW_OFLD_TX_DATA_WR) |
647 FW_WR_COMPL(1) |
648 FW_WR_IMMDLEN(mpalen));
649 req->flowid_len16 = cpu_to_be32(
650 FW_WR_FLOWID(ep->hwtid) |
651 FW_WR_LEN16(wrlen >> 4));
652 req->plen = cpu_to_be32(mpalen);
653 req->tunnel_to_proxy = cpu_to_be32(
654 FW_OFLD_TX_DATA_WR_FLUSH(1) |
655 FW_OFLD_TX_DATA_WR_SHOVE(1));
656
657 mpa = (struct mpa_message *)(req + 1);
658 memset(mpa, 0, sizeof(*mpa));
659 memcpy(mpa->key, MPA_KEY_REP, sizeof(mpa->key));
660 mpa->flags = (ep->mpa_attr.crc_enabled ? MPA_CRC : 0) |
661 (markers_enabled ? MPA_MARKERS : 0);
662 mpa->revision = mpa_rev;
663 mpa->private_data_size = htons(plen);
664 if (plen)
665 memcpy(mpa->private_data, pdata, plen);
666
667 /*
668 * Reference the mpa skb. This ensures the data area
669 * will remain in memory until the hw acks the tx.
670 * Function fw4_ack() will deref it.
671 */
672 skb_get(skb);
673 t4_set_arp_err_handler(skb, NULL, arp_failure_discard);
674 ep->mpa_skb = skb;
675 state_set(&ep->com, MPA_REP_SENT);
676 return c4iw_l2t_send(&ep->com.dev->rdev, skb, ep->l2t);
677 }
678
679 static int act_establish(struct c4iw_dev *dev, struct sk_buff *skb)
680 {
681 struct c4iw_ep *ep;
682 struct cpl_act_establish *req = cplhdr(skb);
683 unsigned int tid = GET_TID(req);
684 unsigned int atid = GET_TID_TID(ntohl(req->tos_atid));
685 struct tid_info *t = dev->rdev.lldi.tids;
686
687 ep = lookup_atid(t, atid);
688
689 PDBG("%s ep %p tid %u snd_isn %u rcv_isn %u\n", __func__, ep, tid,
690 be32_to_cpu(req->snd_isn), be32_to_cpu(req->rcv_isn));
691
692 dst_confirm(ep->dst);
693
694 /* setup the hwtid for this connection */
695 ep->hwtid = tid;
696 cxgb4_insert_tid(t, ep, tid);
697
698 ep->snd_seq = be32_to_cpu(req->snd_isn);
699 ep->rcv_seq = be32_to_cpu(req->rcv_isn);
700
701 set_emss(ep, ntohs(req->tcp_opt));
702
703 /* dealloc the atid */
704 cxgb4_free_atid(t, atid);
705
706 /* start MPA negotiation */
707 send_flowc(ep, NULL);
708 send_mpa_req(ep, skb);
709
710 return 0;
711 }
712
713 static void close_complete_upcall(struct c4iw_ep *ep)
714 {
715 struct iw_cm_event event;
716
717 PDBG("%s ep %p tid %u\n", __func__, ep, ep->hwtid);
718 memset(&event, 0, sizeof(event));
719 event.event = IW_CM_EVENT_CLOSE;
720 if (ep->com.cm_id) {
721 PDBG("close complete delivered ep %p cm_id %p tid %u\n",
722 ep, ep->com.cm_id, ep->hwtid);
723 ep->com.cm_id->event_handler(ep->com.cm_id, &event);
724 ep->com.cm_id->rem_ref(ep->com.cm_id);
725 ep->com.cm_id = NULL;
726 ep->com.qp = NULL;
727 }
728 }
729
730 static int abort_connection(struct c4iw_ep *ep, struct sk_buff *skb, gfp_t gfp)
731 {
732 PDBG("%s ep %p tid %u\n", __func__, ep, ep->hwtid);
733 close_complete_upcall(ep);
734 state_set(&ep->com, ABORTING);
735 return send_abort(ep, skb, gfp);
736 }
737
738 static void peer_close_upcall(struct c4iw_ep *ep)
739 {
740 struct iw_cm_event event;
741
742 PDBG("%s ep %p tid %u\n", __func__, ep, ep->hwtid);
743 memset(&event, 0, sizeof(event));
744 event.event = IW_CM_EVENT_DISCONNECT;
745 if (ep->com.cm_id) {
746 PDBG("peer close delivered ep %p cm_id %p tid %u\n",
747 ep, ep->com.cm_id, ep->hwtid);
748 ep->com.cm_id->event_handler(ep->com.cm_id, &event);
749 }
750 }
751
752 static void peer_abort_upcall(struct c4iw_ep *ep)
753 {
754 struct iw_cm_event event;
755
756 PDBG("%s ep %p tid %u\n", __func__, ep, ep->hwtid);
757 memset(&event, 0, sizeof(event));
758 event.event = IW_CM_EVENT_CLOSE;
759 event.status = -ECONNRESET;
760 if (ep->com.cm_id) {
761 PDBG("abort delivered ep %p cm_id %p tid %u\n", ep,
762 ep->com.cm_id, ep->hwtid);
763 ep->com.cm_id->event_handler(ep->com.cm_id, &event);
764 ep->com.cm_id->rem_ref(ep->com.cm_id);
765 ep->com.cm_id = NULL;
766 ep->com.qp = NULL;
767 }
768 }
769
770 static void connect_reply_upcall(struct c4iw_ep *ep, int status)
771 {
772 struct iw_cm_event event;
773
774 PDBG("%s ep %p tid %u status %d\n", __func__, ep, ep->hwtid, status);
775 memset(&event, 0, sizeof(event));
776 event.event = IW_CM_EVENT_CONNECT_REPLY;
777 event.status = status;
778 event.local_addr = ep->com.local_addr;
779 event.remote_addr = ep->com.remote_addr;
780
781 if ((status == 0) || (status == -ECONNREFUSED)) {
782 event.private_data_len = ep->plen;
783 event.private_data = ep->mpa_pkt + sizeof(struct mpa_message);
784 }
785
786 PDBG("%s ep %p tid %u status %d\n", __func__, ep,
787 ep->hwtid, status);
788 ep->com.cm_id->event_handler(ep->com.cm_id, &event);
789
790 if (status < 0) {
791 ep->com.cm_id->rem_ref(ep->com.cm_id);
792 ep->com.cm_id = NULL;
793 ep->com.qp = NULL;
794 }
795 }
796
797 static void connect_request_upcall(struct c4iw_ep *ep)
798 {
799 struct iw_cm_event event;
800
801 PDBG("%s ep %p tid %u\n", __func__, ep, ep->hwtid);
802 memset(&event, 0, sizeof(event));
803 event.event = IW_CM_EVENT_CONNECT_REQUEST;
804 event.local_addr = ep->com.local_addr;
805 event.remote_addr = ep->com.remote_addr;
806 event.private_data_len = ep->plen;
807 event.private_data = ep->mpa_pkt + sizeof(struct mpa_message);
808 event.provider_data = ep;
809 if (state_read(&ep->parent_ep->com) != DEAD) {
810 c4iw_get_ep(&ep->com);
811 ep->parent_ep->com.cm_id->event_handler(
812 ep->parent_ep->com.cm_id,
813 &event);
814 }
815 c4iw_put_ep(&ep->parent_ep->com);
816 ep->parent_ep = NULL;
817 }
818
819 static void established_upcall(struct c4iw_ep *ep)
820 {
821 struct iw_cm_event event;
822
823 PDBG("%s ep %p tid %u\n", __func__, ep, ep->hwtid);
824 memset(&event, 0, sizeof(event));
825 event.event = IW_CM_EVENT_ESTABLISHED;
826 if (ep->com.cm_id) {
827 PDBG("%s ep %p tid %u\n", __func__, ep, ep->hwtid);
828 ep->com.cm_id->event_handler(ep->com.cm_id, &event);
829 }
830 }
831
832 static int update_rx_credits(struct c4iw_ep *ep, u32 credits)
833 {
834 struct cpl_rx_data_ack *req;
835 struct sk_buff *skb;
836 int wrlen = roundup(sizeof *req, 16);
837
838 PDBG("%s ep %p tid %u credits %u\n", __func__, ep, ep->hwtid, credits);
839 skb = get_skb(NULL, wrlen, GFP_KERNEL);
840 if (!skb) {
841 printk(KERN_ERR MOD "update_rx_credits - cannot alloc skb!\n");
842 return 0;
843 }
844
845 req = (struct cpl_rx_data_ack *) skb_put(skb, wrlen);
846 memset(req, 0, wrlen);
847 INIT_TP_WR(req, ep->hwtid);
848 OPCODE_TID(req) = cpu_to_be32(MK_OPCODE_TID(CPL_RX_DATA_ACK,
849 ep->hwtid));
850 req->credit_dack = cpu_to_be32(credits | RX_FORCE_ACK(1) |
851 F_RX_DACK_CHANGE |
852 V_RX_DACK_MODE(dack_mode));
853 set_wr_txq(skb, CPL_PRIORITY_ACK, ep->ctrlq_idx);
854 c4iw_ofld_send(&ep->com.dev->rdev, skb);
855 return credits;
856 }
857
858 static void process_mpa_reply(struct c4iw_ep *ep, struct sk_buff *skb)
859 {
860 struct mpa_message *mpa;
861 u16 plen;
862 struct c4iw_qp_attributes attrs;
863 enum c4iw_qp_attr_mask mask;
864 int err;
865
866 PDBG("%s ep %p tid %u\n", __func__, ep, ep->hwtid);
867
868 /*
869 * Stop mpa timer. If it expired, then the state has
870 * changed and we bail since ep_timeout already aborted
871 * the connection.
872 */
873 stop_ep_timer(ep);
874 if (state_read(&ep->com) != MPA_REQ_SENT)
875 return;
876
877 /*
878 * If we get more than the supported amount of private data
879 * then we must fail this connection.
880 */
881 if (ep->mpa_pkt_len + skb->len > sizeof(ep->mpa_pkt)) {
882 err = -EINVAL;
883 goto err;
884 }
885
886 /*
887 * copy the new data into our accumulation buffer.
888 */
889 skb_copy_from_linear_data(skb, &(ep->mpa_pkt[ep->mpa_pkt_len]),
890 skb->len);
891 ep->mpa_pkt_len += skb->len;
892
893 /*
894 * if we don't even have the mpa message, then bail.
895 */
896 if (ep->mpa_pkt_len < sizeof(*mpa))
897 return;
898 mpa = (struct mpa_message *) ep->mpa_pkt;
899
900 /* Validate MPA header. */
901 if (mpa->revision != mpa_rev) {
902 err = -EPROTO;
903 goto err;
904 }
905 if (memcmp(mpa->key, MPA_KEY_REP, sizeof(mpa->key))) {
906 err = -EPROTO;
907 goto err;
908 }
909
910 plen = ntohs(mpa->private_data_size);
911
912 /*
913 * Fail if there's too much private data.
914 */
915 if (plen > MPA_MAX_PRIVATE_DATA) {
916 err = -EPROTO;
917 goto err;
918 }
919
920 /*
921 * If plen does not account for pkt size
922 */
923 if (ep->mpa_pkt_len > (sizeof(*mpa) + plen)) {
924 err = -EPROTO;
925 goto err;
926 }
927
928 ep->plen = (u8) plen;
929
930 /*
931 * If we don't have all the pdata yet, then bail.
932 * We'll continue process when more data arrives.
933 */
934 if (ep->mpa_pkt_len < (sizeof(*mpa) + plen))
935 return;
936
937 if (mpa->flags & MPA_REJECT) {
938 err = -ECONNREFUSED;
939 goto err;
940 }
941
942 /*
943 * If we get here we have accumulated the entire mpa
944 * start reply message including private data. And
945 * the MPA header is valid.
946 */
947 state_set(&ep->com, FPDU_MODE);
948 ep->mpa_attr.crc_enabled = (mpa->flags & MPA_CRC) | crc_enabled ? 1 : 0;
949 ep->mpa_attr.recv_marker_enabled = markers_enabled;
950 ep->mpa_attr.xmit_marker_enabled = mpa->flags & MPA_MARKERS ? 1 : 0;
951 ep->mpa_attr.version = mpa_rev;
952 ep->mpa_attr.p2p_type = peer2peer ? p2p_type :
953 FW_RI_INIT_P2PTYPE_DISABLED;
954 PDBG("%s - crc_enabled=%d, recv_marker_enabled=%d, "
955 "xmit_marker_enabled=%d, version=%d\n", __func__,
956 ep->mpa_attr.crc_enabled, ep->mpa_attr.recv_marker_enabled,
957 ep->mpa_attr.xmit_marker_enabled, ep->mpa_attr.version);
958
959 attrs.mpa_attr = ep->mpa_attr;
960 attrs.max_ird = ep->ird;
961 attrs.max_ord = ep->ord;
962 attrs.llp_stream_handle = ep;
963 attrs.next_state = C4IW_QP_STATE_RTS;
964
965 mask = C4IW_QP_ATTR_NEXT_STATE |
966 C4IW_QP_ATTR_LLP_STREAM_HANDLE | C4IW_QP_ATTR_MPA_ATTR |
967 C4IW_QP_ATTR_MAX_IRD | C4IW_QP_ATTR_MAX_ORD;
968
969 /* bind QP and TID with INIT_WR */
970 err = c4iw_modify_qp(ep->com.qp->rhp,
971 ep->com.qp, mask, &attrs, 1);
972 if (err)
973 goto err;
974 goto out;
975 err:
976 state_set(&ep->com, ABORTING);
977 send_abort(ep, skb, GFP_KERNEL);
978 out:
979 connect_reply_upcall(ep, err);
980 return;
981 }
982
983 static void process_mpa_request(struct c4iw_ep *ep, struct sk_buff *skb)
984 {
985 struct mpa_message *mpa;
986 u16 plen;
987
988 PDBG("%s ep %p tid %u\n", __func__, ep, ep->hwtid);
989
990 if (state_read(&ep->com) != MPA_REQ_WAIT)
991 return;
992
993 /*
994 * If we get more than the supported amount of private data
995 * then we must fail this connection.
996 */
997 if (ep->mpa_pkt_len + skb->len > sizeof(ep->mpa_pkt)) {
998 stop_ep_timer(ep);
999 abort_connection(ep, skb, GFP_KERNEL);
1000 return;
1001 }
1002
1003 PDBG("%s enter (%s line %u)\n", __func__, __FILE__, __LINE__);
1004
1005 /*
1006 * Copy the new data into our accumulation buffer.
1007 */
1008 skb_copy_from_linear_data(skb, &(ep->mpa_pkt[ep->mpa_pkt_len]),
1009 skb->len);
1010 ep->mpa_pkt_len += skb->len;
1011
1012 /*
1013 * If we don't even have the mpa message, then bail.
1014 * We'll continue process when more data arrives.
1015 */
1016 if (ep->mpa_pkt_len < sizeof(*mpa))
1017 return;
1018
1019 PDBG("%s enter (%s line %u)\n", __func__, __FILE__, __LINE__);
1020 stop_ep_timer(ep);
1021 mpa = (struct mpa_message *) ep->mpa_pkt;
1022
1023 /*
1024 * Validate MPA Header.
1025 */
1026 if (mpa->revision != mpa_rev) {
1027 abort_connection(ep, skb, GFP_KERNEL);
1028 return;
1029 }
1030
1031 if (memcmp(mpa->key, MPA_KEY_REQ, sizeof(mpa->key))) {
1032 abort_connection(ep, skb, GFP_KERNEL);
1033 return;
1034 }
1035
1036 plen = ntohs(mpa->private_data_size);
1037
1038 /*
1039 * Fail if there's too much private data.
1040 */
1041 if (plen > MPA_MAX_PRIVATE_DATA) {
1042 abort_connection(ep, skb, GFP_KERNEL);
1043 return;
1044 }
1045
1046 /*
1047 * If plen does not account for pkt size
1048 */
1049 if (ep->mpa_pkt_len > (sizeof(*mpa) + plen)) {
1050 abort_connection(ep, skb, GFP_KERNEL);
1051 return;
1052 }
1053 ep->plen = (u8) plen;
1054
1055 /*
1056 * If we don't have all the pdata yet, then bail.
1057 */
1058 if (ep->mpa_pkt_len < (sizeof(*mpa) + plen))
1059 return;
1060
1061 /*
1062 * If we get here we have accumulated the entire mpa
1063 * start reply message including private data.
1064 */
1065 ep->mpa_attr.initiator = 0;
1066 ep->mpa_attr.crc_enabled = (mpa->flags & MPA_CRC) | crc_enabled ? 1 : 0;
1067 ep->mpa_attr.recv_marker_enabled = markers_enabled;
1068 ep->mpa_attr.xmit_marker_enabled = mpa->flags & MPA_MARKERS ? 1 : 0;
1069 ep->mpa_attr.version = mpa_rev;
1070 ep->mpa_attr.p2p_type = peer2peer ? p2p_type :
1071 FW_RI_INIT_P2PTYPE_DISABLED;
1072 PDBG("%s - crc_enabled=%d, recv_marker_enabled=%d, "
1073 "xmit_marker_enabled=%d, version=%d p2p_type=%d\n", __func__,
1074 ep->mpa_attr.crc_enabled, ep->mpa_attr.recv_marker_enabled,
1075 ep->mpa_attr.xmit_marker_enabled, ep->mpa_attr.version,
1076 ep->mpa_attr.p2p_type);
1077
1078 state_set(&ep->com, MPA_REQ_RCVD);
1079
1080 /* drive upcall */
1081 connect_request_upcall(ep);
1082 return;
1083 }
1084
1085 static int rx_data(struct c4iw_dev *dev, struct sk_buff *skb)
1086 {
1087 struct c4iw_ep *ep;
1088 struct cpl_rx_data *hdr = cplhdr(skb);
1089 unsigned int dlen = ntohs(hdr->len);
1090 unsigned int tid = GET_TID(hdr);
1091 struct tid_info *t = dev->rdev.lldi.tids;
1092
1093 ep = lookup_tid(t, tid);
1094 PDBG("%s ep %p tid %u dlen %u\n", __func__, ep, ep->hwtid, dlen);
1095 skb_pull(skb, sizeof(*hdr));
1096 skb_trim(skb, dlen);
1097
1098 ep->rcv_seq += dlen;
1099 BUG_ON(ep->rcv_seq != (ntohl(hdr->seq) + dlen));
1100
1101 /* update RX credits */
1102 update_rx_credits(ep, dlen);
1103
1104 switch (state_read(&ep->com)) {
1105 case MPA_REQ_SENT:
1106 process_mpa_reply(ep, skb);
1107 break;
1108 case MPA_REQ_WAIT:
1109 process_mpa_request(ep, skb);
1110 break;
1111 case MPA_REP_SENT:
1112 break;
1113 default:
1114 printk(KERN_ERR MOD "%s Unexpected streaming data."
1115 " ep %p state %d tid %u\n",
1116 __func__, ep, state_read(&ep->com), ep->hwtid);
1117
1118 /*
1119 * The ep will timeout and inform the ULP of the failure.
1120 * See ep_timeout().
1121 */
1122 break;
1123 }
1124 return 0;
1125 }
1126
1127 static int abort_rpl(struct c4iw_dev *dev, struct sk_buff *skb)
1128 {
1129 struct c4iw_ep *ep;
1130 struct cpl_abort_rpl_rss *rpl = cplhdr(skb);
1131 int release = 0;
1132 unsigned int tid = GET_TID(rpl);
1133 struct tid_info *t = dev->rdev.lldi.tids;
1134
1135 ep = lookup_tid(t, tid);
1136 PDBG("%s ep %p tid %u\n", __func__, ep, ep->hwtid);
1137 BUG_ON(!ep);
1138 mutex_lock(&ep->com.mutex);
1139 switch (ep->com.state) {
1140 case ABORTING:
1141 __state_set(&ep->com, DEAD);
1142 release = 1;
1143 break;
1144 default:
1145 printk(KERN_ERR "%s ep %p state %d\n",
1146 __func__, ep, ep->com.state);
1147 break;
1148 }
1149 mutex_unlock(&ep->com.mutex);
1150
1151 if (release)
1152 release_ep_resources(ep);
1153 return 0;
1154 }
1155
1156 /*
1157 * Return whether a failed active open has allocated a TID
1158 */
1159 static inline int act_open_has_tid(int status)
1160 {
1161 return status != CPL_ERR_TCAM_FULL && status != CPL_ERR_CONN_EXIST &&
1162 status != CPL_ERR_ARP_MISS;
1163 }
1164
1165 static int act_open_rpl(struct c4iw_dev *dev, struct sk_buff *skb)
1166 {
1167 struct c4iw_ep *ep;
1168 struct cpl_act_open_rpl *rpl = cplhdr(skb);
1169 unsigned int atid = GET_TID_TID(GET_AOPEN_ATID(
1170 ntohl(rpl->atid_status)));
1171 struct tid_info *t = dev->rdev.lldi.tids;
1172 int status = GET_AOPEN_STATUS(ntohl(rpl->atid_status));
1173
1174 ep = lookup_atid(t, atid);
1175
1176 PDBG("%s ep %p atid %u status %u errno %d\n", __func__, ep, atid,
1177 status, status2errno(status));
1178
1179 if (status == CPL_ERR_RTX_NEG_ADVICE) {
1180 printk(KERN_WARNING MOD "Connection problems for atid %u\n",
1181 atid);
1182 return 0;
1183 }
1184
1185 connect_reply_upcall(ep, status2errno(status));
1186 state_set(&ep->com, DEAD);
1187
1188 if (status && act_open_has_tid(status))
1189 cxgb4_remove_tid(ep->com.dev->rdev.lldi.tids, 0, GET_TID(rpl));
1190
1191 cxgb4_free_atid(t, atid);
1192 dst_release(ep->dst);
1193 cxgb4_l2t_release(ep->l2t);
1194 c4iw_put_ep(&ep->com);
1195
1196 return 0;
1197 }
1198
1199 static int pass_open_rpl(struct c4iw_dev *dev, struct sk_buff *skb)
1200 {
1201 struct cpl_pass_open_rpl *rpl = cplhdr(skb);
1202 struct tid_info *t = dev->rdev.lldi.tids;
1203 unsigned int stid = GET_TID(rpl);
1204 struct c4iw_listen_ep *ep = lookup_stid(t, stid);
1205
1206 if (!ep) {
1207 printk(KERN_ERR MOD "stid %d lookup failure!\n", stid);
1208 return 0;
1209 }
1210 PDBG("%s ep %p status %d error %d\n", __func__, ep,
1211 rpl->status, status2errno(rpl->status));
1212 ep->com.wr_wait.ret = status2errno(rpl->status);
1213 ep->com.wr_wait.done = 1;
1214 wake_up(&ep->com.wr_wait.wait);
1215
1216 return 0;
1217 }
1218
1219 static int listen_stop(struct c4iw_listen_ep *ep)
1220 {
1221 struct sk_buff *skb;
1222 struct cpl_close_listsvr_req *req;
1223
1224 PDBG("%s ep %p\n", __func__, ep);
1225 skb = get_skb(NULL, sizeof(*req), GFP_KERNEL);
1226 if (!skb) {
1227 printk(KERN_ERR MOD "%s - failed to alloc skb\n", __func__);
1228 return -ENOMEM;
1229 }
1230 req = (struct cpl_close_listsvr_req *) skb_put(skb, sizeof(*req));
1231 INIT_TP_WR(req, 0);
1232 OPCODE_TID(req) = cpu_to_be32(MK_OPCODE_TID(CPL_CLOSE_LISTSRV_REQ,
1233 ep->stid));
1234 req->reply_ctrl = cpu_to_be16(
1235 QUEUENO(ep->com.dev->rdev.lldi.rxq_ids[0]));
1236 set_wr_txq(skb, CPL_PRIORITY_SETUP, 0);
1237 return c4iw_ofld_send(&ep->com.dev->rdev, skb);
1238 }
1239
1240 static int close_listsrv_rpl(struct c4iw_dev *dev, struct sk_buff *skb)
1241 {
1242 struct cpl_close_listsvr_rpl *rpl = cplhdr(skb);
1243 struct tid_info *t = dev->rdev.lldi.tids;
1244 unsigned int stid = GET_TID(rpl);
1245 struct c4iw_listen_ep *ep = lookup_stid(t, stid);
1246
1247 PDBG("%s ep %p\n", __func__, ep);
1248 ep->com.wr_wait.ret = status2errno(rpl->status);
1249 ep->com.wr_wait.done = 1;
1250 wake_up(&ep->com.wr_wait.wait);
1251 return 0;
1252 }
1253
1254 static void accept_cr(struct c4iw_ep *ep, __be32 peer_ip, struct sk_buff *skb,
1255 struct cpl_pass_accept_req *req)
1256 {
1257 struct cpl_pass_accept_rpl *rpl;
1258 unsigned int mtu_idx;
1259 u64 opt0;
1260 u32 opt2;
1261 int wscale;
1262
1263 PDBG("%s ep %p tid %u\n", __func__, ep, ep->hwtid);
1264 BUG_ON(skb_cloned(skb));
1265 skb_trim(skb, sizeof(*rpl));
1266 skb_get(skb);
1267 cxgb4_best_mtu(ep->com.dev->rdev.lldi.mtus, ep->mtu, &mtu_idx);
1268 wscale = compute_wscale(rcv_win);
1269 opt0 = KEEP_ALIVE(1) |
1270 DELACK(1) |
1271 WND_SCALE(wscale) |
1272 MSS_IDX(mtu_idx) |
1273 L2T_IDX(ep->l2t->idx) |
1274 TX_CHAN(ep->tx_chan) |
1275 SMAC_SEL(ep->smac_idx) |
1276 DSCP(ep->tos) |
1277 RCV_BUFSIZ(rcv_win>>10);
1278 opt2 = RX_CHANNEL(0) |
1279 RSS_QUEUE_VALID | RSS_QUEUE(ep->rss_qid);
1280
1281 if (enable_tcp_timestamps && req->tcpopt.tstamp)
1282 opt2 |= TSTAMPS_EN(1);
1283 if (enable_tcp_sack && req->tcpopt.sack)
1284 opt2 |= SACK_EN(1);
1285 if (wscale && enable_tcp_window_scaling)
1286 opt2 |= WND_SCALE_EN(1);
1287
1288 rpl = cplhdr(skb);
1289 INIT_TP_WR(rpl, ep->hwtid);
1290 OPCODE_TID(rpl) = cpu_to_be32(MK_OPCODE_TID(CPL_PASS_ACCEPT_RPL,
1291 ep->hwtid));
1292 rpl->opt0 = cpu_to_be64(opt0);
1293 rpl->opt2 = cpu_to_be32(opt2);
1294 set_wr_txq(skb, CPL_PRIORITY_SETUP, ep->ctrlq_idx);
1295 c4iw_l2t_send(&ep->com.dev->rdev, skb, ep->l2t);
1296
1297 return;
1298 }
1299
1300 static void reject_cr(struct c4iw_dev *dev, u32 hwtid, __be32 peer_ip,
1301 struct sk_buff *skb)
1302 {
1303 PDBG("%s c4iw_dev %p tid %u peer_ip %x\n", __func__, dev, hwtid,
1304 peer_ip);
1305 BUG_ON(skb_cloned(skb));
1306 skb_trim(skb, sizeof(struct cpl_tid_release));
1307 skb_get(skb);
1308 release_tid(&dev->rdev, hwtid, skb);
1309 return;
1310 }
1311
1312 static void get_4tuple(struct cpl_pass_accept_req *req,
1313 __be32 *local_ip, __be32 *peer_ip,
1314 __be16 *local_port, __be16 *peer_port)
1315 {
1316 int eth_len = G_ETH_HDR_LEN(be32_to_cpu(req->hdr_len));
1317 int ip_len = G_IP_HDR_LEN(be32_to_cpu(req->hdr_len));
1318 struct iphdr *ip = (struct iphdr *)((u8 *)(req + 1) + eth_len);
1319 struct tcphdr *tcp = (struct tcphdr *)
1320 ((u8 *)(req + 1) + eth_len + ip_len);
1321
1322 PDBG("%s saddr 0x%x daddr 0x%x sport %u dport %u\n", __func__,
1323 ntohl(ip->saddr), ntohl(ip->daddr), ntohs(tcp->source),
1324 ntohs(tcp->dest));
1325
1326 *peer_ip = ip->saddr;
1327 *local_ip = ip->daddr;
1328 *peer_port = tcp->source;
1329 *local_port = tcp->dest;
1330
1331 return;
1332 }
1333
1334 static int pass_accept_req(struct c4iw_dev *dev, struct sk_buff *skb)
1335 {
1336 struct c4iw_ep *child_ep, *parent_ep;
1337 struct cpl_pass_accept_req *req = cplhdr(skb);
1338 unsigned int stid = GET_POPEN_TID(ntohl(req->tos_stid));
1339 struct tid_info *t = dev->rdev.lldi.tids;
1340 unsigned int hwtid = GET_TID(req);
1341 struct dst_entry *dst;
1342 struct l2t_entry *l2t;
1343 struct rtable *rt;
1344 __be32 local_ip, peer_ip;
1345 __be16 local_port, peer_port;
1346 struct net_device *pdev;
1347 u32 tx_chan, smac_idx;
1348 u16 rss_qid;
1349 u32 mtu;
1350 int step;
1351 int txq_idx, ctrlq_idx;
1352
1353 parent_ep = lookup_stid(t, stid);
1354 PDBG("%s parent ep %p tid %u\n", __func__, parent_ep, hwtid);
1355
1356 get_4tuple(req, &local_ip, &peer_ip, &local_port, &peer_port);
1357
1358 if (state_read(&parent_ep->com) != LISTEN) {
1359 printk(KERN_ERR "%s - listening ep not in LISTEN\n",
1360 __func__);
1361 goto reject;
1362 }
1363
1364 /* Find output route */
1365 rt = find_route(dev, local_ip, peer_ip, local_port, peer_port,
1366 GET_POPEN_TOS(ntohl(req->tos_stid)));
1367 if (!rt) {
1368 printk(KERN_ERR MOD "%s - failed to find dst entry!\n",
1369 __func__);
1370 goto reject;
1371 }
1372 dst = &rt->dst;
1373 if (dst->neighbour->dev->flags & IFF_LOOPBACK) {
1374 pdev = ip_dev_find(&init_net, peer_ip);
1375 BUG_ON(!pdev);
1376 l2t = cxgb4_l2t_get(dev->rdev.lldi.l2t, dst->neighbour,
1377 pdev, 0);
1378 mtu = pdev->mtu;
1379 tx_chan = cxgb4_port_chan(pdev);
1380 smac_idx = (cxgb4_port_viid(pdev) & 0x7F) << 1;
1381 step = dev->rdev.lldi.ntxq / dev->rdev.lldi.nchan;
1382 txq_idx = cxgb4_port_idx(pdev) * step;
1383 ctrlq_idx = cxgb4_port_idx(pdev);
1384 step = dev->rdev.lldi.nrxq / dev->rdev.lldi.nchan;
1385 rss_qid = dev->rdev.lldi.rxq_ids[cxgb4_port_idx(pdev) * step];
1386 dev_put(pdev);
1387 } else {
1388 l2t = cxgb4_l2t_get(dev->rdev.lldi.l2t, dst->neighbour,
1389 dst->neighbour->dev, 0);
1390 mtu = dst_mtu(dst);
1391 tx_chan = cxgb4_port_chan(dst->neighbour->dev);
1392 smac_idx = (cxgb4_port_viid(dst->neighbour->dev) & 0x7F) << 1;
1393 step = dev->rdev.lldi.ntxq / dev->rdev.lldi.nchan;
1394 txq_idx = cxgb4_port_idx(dst->neighbour->dev) * step;
1395 ctrlq_idx = cxgb4_port_idx(dst->neighbour->dev);
1396 step = dev->rdev.lldi.nrxq / dev->rdev.lldi.nchan;
1397 rss_qid = dev->rdev.lldi.rxq_ids[
1398 cxgb4_port_idx(dst->neighbour->dev) * step];
1399 }
1400 if (!l2t) {
1401 printk(KERN_ERR MOD "%s - failed to allocate l2t entry!\n",
1402 __func__);
1403 dst_release(dst);
1404 goto reject;
1405 }
1406
1407 child_ep = alloc_ep(sizeof(*child_ep), GFP_KERNEL);
1408 if (!child_ep) {
1409 printk(KERN_ERR MOD "%s - failed to allocate ep entry!\n",
1410 __func__);
1411 cxgb4_l2t_release(l2t);
1412 dst_release(dst);
1413 goto reject;
1414 }
1415 state_set(&child_ep->com, CONNECTING);
1416 child_ep->com.dev = dev;
1417 child_ep->com.cm_id = NULL;
1418 child_ep->com.local_addr.sin_family = PF_INET;
1419 child_ep->com.local_addr.sin_port = local_port;
1420 child_ep->com.local_addr.sin_addr.s_addr = local_ip;
1421 child_ep->com.remote_addr.sin_family = PF_INET;
1422 child_ep->com.remote_addr.sin_port = peer_port;
1423 child_ep->com.remote_addr.sin_addr.s_addr = peer_ip;
1424 c4iw_get_ep(&parent_ep->com);
1425 child_ep->parent_ep = parent_ep;
1426 child_ep->tos = GET_POPEN_TOS(ntohl(req->tos_stid));
1427 child_ep->l2t = l2t;
1428 child_ep->dst = dst;
1429 child_ep->hwtid = hwtid;
1430 child_ep->tx_chan = tx_chan;
1431 child_ep->smac_idx = smac_idx;
1432 child_ep->rss_qid = rss_qid;
1433 child_ep->mtu = mtu;
1434 child_ep->txq_idx = txq_idx;
1435 child_ep->ctrlq_idx = ctrlq_idx;
1436
1437 PDBG("%s tx_chan %u smac_idx %u rss_qid %u\n", __func__,
1438 tx_chan, smac_idx, rss_qid);
1439
1440 init_timer(&child_ep->timer);
1441 cxgb4_insert_tid(t, child_ep, hwtid);
1442 accept_cr(child_ep, peer_ip, skb, req);
1443 goto out;
1444 reject:
1445 reject_cr(dev, hwtid, peer_ip, skb);
1446 out:
1447 return 0;
1448 }
1449
1450 static int pass_establish(struct c4iw_dev *dev, struct sk_buff *skb)
1451 {
1452 struct c4iw_ep *ep;
1453 struct cpl_pass_establish *req = cplhdr(skb);
1454 struct tid_info *t = dev->rdev.lldi.tids;
1455 unsigned int tid = GET_TID(req);
1456
1457 ep = lookup_tid(t, tid);
1458 PDBG("%s ep %p tid %u\n", __func__, ep, ep->hwtid);
1459 ep->snd_seq = be32_to_cpu(req->snd_isn);
1460 ep->rcv_seq = be32_to_cpu(req->rcv_isn);
1461
1462 set_emss(ep, ntohs(req->tcp_opt));
1463
1464 dst_confirm(ep->dst);
1465 state_set(&ep->com, MPA_REQ_WAIT);
1466 start_ep_timer(ep);
1467 send_flowc(ep, skb);
1468
1469 return 0;
1470 }
1471
1472 static int peer_close(struct c4iw_dev *dev, struct sk_buff *skb)
1473 {
1474 struct cpl_peer_close *hdr = cplhdr(skb);
1475 struct c4iw_ep *ep;
1476 struct c4iw_qp_attributes attrs;
1477 int disconnect = 1;
1478 int release = 0;
1479 int closing = 0;
1480 struct tid_info *t = dev->rdev.lldi.tids;
1481 unsigned int tid = GET_TID(hdr);
1482
1483 ep = lookup_tid(t, tid);
1484 PDBG("%s ep %p tid %u\n", __func__, ep, ep->hwtid);
1485 dst_confirm(ep->dst);
1486
1487 mutex_lock(&ep->com.mutex);
1488 switch (ep->com.state) {
1489 case MPA_REQ_WAIT:
1490 __state_set(&ep->com, CLOSING);
1491 break;
1492 case MPA_REQ_SENT:
1493 __state_set(&ep->com, CLOSING);
1494 connect_reply_upcall(ep, -ECONNRESET);
1495 break;
1496 case MPA_REQ_RCVD:
1497
1498 /*
1499 * We're gonna mark this puppy DEAD, but keep
1500 * the reference on it until the ULP accepts or
1501 * rejects the CR. Also wake up anyone waiting
1502 * in rdma connection migration (see c4iw_accept_cr()).
1503 */
1504 __state_set(&ep->com, CLOSING);
1505 ep->com.wr_wait.done = 1;
1506 ep->com.wr_wait.ret = -ECONNRESET;
1507 PDBG("waking up ep %p tid %u\n", ep, ep->hwtid);
1508 wake_up(&ep->com.wr_wait.wait);
1509 break;
1510 case MPA_REP_SENT:
1511 __state_set(&ep->com, CLOSING);
1512 ep->com.wr_wait.done = 1;
1513 ep->com.wr_wait.ret = -ECONNRESET;
1514 PDBG("waking up ep %p tid %u\n", ep, ep->hwtid);
1515 wake_up(&ep->com.wr_wait.wait);
1516 break;
1517 case FPDU_MODE:
1518 start_ep_timer(ep);
1519 __state_set(&ep->com, CLOSING);
1520 closing = 1;
1521 peer_close_upcall(ep);
1522 break;
1523 case ABORTING:
1524 disconnect = 0;
1525 break;
1526 case CLOSING:
1527 __state_set(&ep->com, MORIBUND);
1528 disconnect = 0;
1529 break;
1530 case MORIBUND:
1531 stop_ep_timer(ep);
1532 if (ep->com.cm_id && ep->com.qp) {
1533 attrs.next_state = C4IW_QP_STATE_IDLE;
1534 c4iw_modify_qp(ep->com.qp->rhp, ep->com.qp,
1535 C4IW_QP_ATTR_NEXT_STATE, &attrs, 1);
1536 }
1537 close_complete_upcall(ep);
1538 __state_set(&ep->com, DEAD);
1539 release = 1;
1540 disconnect = 0;
1541 break;
1542 case DEAD:
1543 disconnect = 0;
1544 break;
1545 default:
1546 BUG_ON(1);
1547 }
1548 mutex_unlock(&ep->com.mutex);
1549 if (closing) {
1550 attrs.next_state = C4IW_QP_STATE_CLOSING;
1551 c4iw_modify_qp(ep->com.qp->rhp, ep->com.qp,
1552 C4IW_QP_ATTR_NEXT_STATE, &attrs, 1);
1553 }
1554 if (disconnect)
1555 c4iw_ep_disconnect(ep, 0, GFP_KERNEL);
1556 if (release)
1557 release_ep_resources(ep);
1558 return 0;
1559 }
1560
1561 /*
1562 * Returns whether an ABORT_REQ_RSS message is a negative advice.
1563 */
1564 static int is_neg_adv_abort(unsigned int status)
1565 {
1566 return status == CPL_ERR_RTX_NEG_ADVICE ||
1567 status == CPL_ERR_PERSIST_NEG_ADVICE;
1568 }
1569
1570 static int peer_abort(struct c4iw_dev *dev, struct sk_buff *skb)
1571 {
1572 struct cpl_abort_req_rss *req = cplhdr(skb);
1573 struct c4iw_ep *ep;
1574 struct cpl_abort_rpl *rpl;
1575 struct sk_buff *rpl_skb;
1576 struct c4iw_qp_attributes attrs;
1577 int ret;
1578 int release = 0;
1579 struct tid_info *t = dev->rdev.lldi.tids;
1580 unsigned int tid = GET_TID(req);
1581
1582 ep = lookup_tid(t, tid);
1583 if (is_neg_adv_abort(req->status)) {
1584 PDBG("%s neg_adv_abort ep %p tid %u\n", __func__, ep,
1585 ep->hwtid);
1586 return 0;
1587 }
1588 PDBG("%s ep %p tid %u state %u\n", __func__, ep, ep->hwtid,
1589 ep->com.state);
1590
1591 /*
1592 * Wake up any threads in rdma_init() or rdma_fini().
1593 */
1594 ep->com.wr_wait.done = 1;
1595 ep->com.wr_wait.ret = -ECONNRESET;
1596 wake_up(&ep->com.wr_wait.wait);
1597
1598 mutex_lock(&ep->com.mutex);
1599 switch (ep->com.state) {
1600 case CONNECTING:
1601 break;
1602 case MPA_REQ_WAIT:
1603 stop_ep_timer(ep);
1604 break;
1605 case MPA_REQ_SENT:
1606 stop_ep_timer(ep);
1607 connect_reply_upcall(ep, -ECONNRESET);
1608 break;
1609 case MPA_REP_SENT:
1610 break;
1611 case MPA_REQ_RCVD:
1612 break;
1613 case MORIBUND:
1614 case CLOSING:
1615 stop_ep_timer(ep);
1616 /*FALLTHROUGH*/
1617 case FPDU_MODE:
1618 if (ep->com.cm_id && ep->com.qp) {
1619 attrs.next_state = C4IW_QP_STATE_ERROR;
1620 ret = c4iw_modify_qp(ep->com.qp->rhp,
1621 ep->com.qp, C4IW_QP_ATTR_NEXT_STATE,
1622 &attrs, 1);
1623 if (ret)
1624 printk(KERN_ERR MOD
1625 "%s - qp <- error failed!\n",
1626 __func__);
1627 }
1628 peer_abort_upcall(ep);
1629 break;
1630 case ABORTING:
1631 break;
1632 case DEAD:
1633 PDBG("%s PEER_ABORT IN DEAD STATE!!!!\n", __func__);
1634 mutex_unlock(&ep->com.mutex);
1635 return 0;
1636 default:
1637 BUG_ON(1);
1638 break;
1639 }
1640 dst_confirm(ep->dst);
1641 if (ep->com.state != ABORTING) {
1642 __state_set(&ep->com, DEAD);
1643 release = 1;
1644 }
1645 mutex_unlock(&ep->com.mutex);
1646
1647 rpl_skb = get_skb(skb, sizeof(*rpl), GFP_KERNEL);
1648 if (!rpl_skb) {
1649 printk(KERN_ERR MOD "%s - cannot allocate skb!\n",
1650 __func__);
1651 release = 1;
1652 goto out;
1653 }
1654 set_wr_txq(skb, CPL_PRIORITY_DATA, ep->txq_idx);
1655 rpl = (struct cpl_abort_rpl *) skb_put(rpl_skb, sizeof(*rpl));
1656 INIT_TP_WR(rpl, ep->hwtid);
1657 OPCODE_TID(rpl) = cpu_to_be32(MK_OPCODE_TID(CPL_ABORT_RPL, ep->hwtid));
1658 rpl->cmd = CPL_ABORT_NO_RST;
1659 c4iw_ofld_send(&ep->com.dev->rdev, rpl_skb);
1660 out:
1661 if (release)
1662 release_ep_resources(ep);
1663 return 0;
1664 }
1665
1666 static int close_con_rpl(struct c4iw_dev *dev, struct sk_buff *skb)
1667 {
1668 struct c4iw_ep *ep;
1669 struct c4iw_qp_attributes attrs;
1670 struct cpl_close_con_rpl *rpl = cplhdr(skb);
1671 int release = 0;
1672 struct tid_info *t = dev->rdev.lldi.tids;
1673 unsigned int tid = GET_TID(rpl);
1674
1675 ep = lookup_tid(t, tid);
1676
1677 PDBG("%s ep %p tid %u\n", __func__, ep, ep->hwtid);
1678 BUG_ON(!ep);
1679
1680 /* The cm_id may be null if we failed to connect */
1681 mutex_lock(&ep->com.mutex);
1682 switch (ep->com.state) {
1683 case CLOSING:
1684 __state_set(&ep->com, MORIBUND);
1685 break;
1686 case MORIBUND:
1687 stop_ep_timer(ep);
1688 if ((ep->com.cm_id) && (ep->com.qp)) {
1689 attrs.next_state = C4IW_QP_STATE_IDLE;
1690 c4iw_modify_qp(ep->com.qp->rhp,
1691 ep->com.qp,
1692 C4IW_QP_ATTR_NEXT_STATE,
1693 &attrs, 1);
1694 }
1695 close_complete_upcall(ep);
1696 __state_set(&ep->com, DEAD);
1697 release = 1;
1698 break;
1699 case ABORTING:
1700 case DEAD:
1701 break;
1702 default:
1703 BUG_ON(1);
1704 break;
1705 }
1706 mutex_unlock(&ep->com.mutex);
1707 if (release)
1708 release_ep_resources(ep);
1709 return 0;
1710 }
1711
1712 static int terminate(struct c4iw_dev *dev, struct sk_buff *skb)
1713 {
1714 struct cpl_rdma_terminate *rpl = cplhdr(skb);
1715 struct tid_info *t = dev->rdev.lldi.tids;
1716 unsigned int tid = GET_TID(rpl);
1717 struct c4iw_ep *ep;
1718 struct c4iw_qp_attributes attrs;
1719
1720 ep = lookup_tid(t, tid);
1721 BUG_ON(!ep);
1722
1723 if (ep->com.qp) {
1724 printk(KERN_WARNING MOD "TERM received tid %u qpid %u\n", tid,
1725 ep->com.qp->wq.sq.qid);
1726 attrs.next_state = C4IW_QP_STATE_TERMINATE;
1727 c4iw_modify_qp(ep->com.qp->rhp, ep->com.qp,
1728 C4IW_QP_ATTR_NEXT_STATE, &attrs, 1);
1729 } else
1730 printk(KERN_WARNING MOD "TERM received tid %u no qp\n", tid);
1731
1732 return 0;
1733 }
1734
1735 /*
1736 * Upcall from the adapter indicating data has been transmitted.
1737 * For us its just the single MPA request or reply. We can now free
1738 * the skb holding the mpa message.
1739 */
1740 static int fw4_ack(struct c4iw_dev *dev, struct sk_buff *skb)
1741 {
1742 struct c4iw_ep *ep;
1743 struct cpl_fw4_ack *hdr = cplhdr(skb);
1744 u8 credits = hdr->credits;
1745 unsigned int tid = GET_TID(hdr);
1746 struct tid_info *t = dev->rdev.lldi.tids;
1747
1748
1749 ep = lookup_tid(t, tid);
1750 PDBG("%s ep %p tid %u credits %u\n", __func__, ep, ep->hwtid, credits);
1751 if (credits == 0) {
1752 PDBG("%s 0 credit ack ep %p tid %u state %u\n",
1753 __func__, ep, ep->hwtid, state_read(&ep->com));
1754 return 0;
1755 }
1756
1757 dst_confirm(ep->dst);
1758 if (ep->mpa_skb) {
1759 PDBG("%s last streaming msg ack ep %p tid %u state %u "
1760 "initiator %u freeing skb\n", __func__, ep, ep->hwtid,
1761 state_read(&ep->com), ep->mpa_attr.initiator ? 1 : 0);
1762 kfree_skb(ep->mpa_skb);
1763 ep->mpa_skb = NULL;
1764 }
1765 return 0;
1766 }
1767
1768 int c4iw_reject_cr(struct iw_cm_id *cm_id, const void *pdata, u8 pdata_len)
1769 {
1770 int err;
1771 struct c4iw_ep *ep = to_ep(cm_id);
1772 PDBG("%s ep %p tid %u\n", __func__, ep, ep->hwtid);
1773
1774 if (state_read(&ep->com) == DEAD) {
1775 c4iw_put_ep(&ep->com);
1776 return -ECONNRESET;
1777 }
1778 BUG_ON(state_read(&ep->com) != MPA_REQ_RCVD);
1779 if (mpa_rev == 0)
1780 abort_connection(ep, NULL, GFP_KERNEL);
1781 else {
1782 err = send_mpa_reject(ep, pdata, pdata_len);
1783 err = c4iw_ep_disconnect(ep, 0, GFP_KERNEL);
1784 }
1785 c4iw_put_ep(&ep->com);
1786 return 0;
1787 }
1788
1789 int c4iw_accept_cr(struct iw_cm_id *cm_id, struct iw_cm_conn_param *conn_param)
1790 {
1791 int err;
1792 struct c4iw_qp_attributes attrs;
1793 enum c4iw_qp_attr_mask mask;
1794 struct c4iw_ep *ep = to_ep(cm_id);
1795 struct c4iw_dev *h = to_c4iw_dev(cm_id->device);
1796 struct c4iw_qp *qp = get_qhp(h, conn_param->qpn);
1797
1798 PDBG("%s ep %p tid %u\n", __func__, ep, ep->hwtid);
1799 if (state_read(&ep->com) == DEAD) {
1800 err = -ECONNRESET;
1801 goto err;
1802 }
1803
1804 BUG_ON(state_read(&ep->com) != MPA_REQ_RCVD);
1805 BUG_ON(!qp);
1806
1807 if ((conn_param->ord > c4iw_max_read_depth) ||
1808 (conn_param->ird > c4iw_max_read_depth)) {
1809 abort_connection(ep, NULL, GFP_KERNEL);
1810 err = -EINVAL;
1811 goto err;
1812 }
1813
1814 cm_id->add_ref(cm_id);
1815 ep->com.cm_id = cm_id;
1816 ep->com.qp = qp;
1817
1818 ep->ird = conn_param->ird;
1819 ep->ord = conn_param->ord;
1820
1821 if (peer2peer && ep->ird == 0)
1822 ep->ird = 1;
1823
1824 PDBG("%s %d ird %d ord %d\n", __func__, __LINE__, ep->ird, ep->ord);
1825
1826 /* bind QP to EP and move to RTS */
1827 attrs.mpa_attr = ep->mpa_attr;
1828 attrs.max_ird = ep->ird;
1829 attrs.max_ord = ep->ord;
1830 attrs.llp_stream_handle = ep;
1831 attrs.next_state = C4IW_QP_STATE_RTS;
1832
1833 /* bind QP and TID with INIT_WR */
1834 mask = C4IW_QP_ATTR_NEXT_STATE |
1835 C4IW_QP_ATTR_LLP_STREAM_HANDLE |
1836 C4IW_QP_ATTR_MPA_ATTR |
1837 C4IW_QP_ATTR_MAX_IRD |
1838 C4IW_QP_ATTR_MAX_ORD;
1839
1840 err = c4iw_modify_qp(ep->com.qp->rhp,
1841 ep->com.qp, mask, &attrs, 1);
1842 if (err)
1843 goto err1;
1844 err = send_mpa_reply(ep, conn_param->private_data,
1845 conn_param->private_data_len);
1846 if (err)
1847 goto err1;
1848
1849 state_set(&ep->com, FPDU_MODE);
1850 established_upcall(ep);
1851 c4iw_put_ep(&ep->com);
1852 return 0;
1853 err1:
1854 ep->com.cm_id = NULL;
1855 ep->com.qp = NULL;
1856 cm_id->rem_ref(cm_id);
1857 err:
1858 c4iw_put_ep(&ep->com);
1859 return err;
1860 }
1861
1862 int c4iw_connect(struct iw_cm_id *cm_id, struct iw_cm_conn_param *conn_param)
1863 {
1864 int err = 0;
1865 struct c4iw_dev *dev = to_c4iw_dev(cm_id->device);
1866 struct c4iw_ep *ep;
1867 struct rtable *rt;
1868 struct net_device *pdev;
1869 int step;
1870
1871 if ((conn_param->ord > c4iw_max_read_depth) ||
1872 (conn_param->ird > c4iw_max_read_depth)) {
1873 err = -EINVAL;
1874 goto out;
1875 }
1876 ep = alloc_ep(sizeof(*ep), GFP_KERNEL);
1877 if (!ep) {
1878 printk(KERN_ERR MOD "%s - cannot alloc ep.\n", __func__);
1879 err = -ENOMEM;
1880 goto out;
1881 }
1882 init_timer(&ep->timer);
1883 ep->plen = conn_param->private_data_len;
1884 if (ep->plen)
1885 memcpy(ep->mpa_pkt + sizeof(struct mpa_message),
1886 conn_param->private_data, ep->plen);
1887 ep->ird = conn_param->ird;
1888 ep->ord = conn_param->ord;
1889
1890 if (peer2peer && ep->ord == 0)
1891 ep->ord = 1;
1892
1893 cm_id->add_ref(cm_id);
1894 ep->com.dev = dev;
1895 ep->com.cm_id = cm_id;
1896 ep->com.qp = get_qhp(dev, conn_param->qpn);
1897 BUG_ON(!ep->com.qp);
1898 PDBG("%s qpn 0x%x qp %p cm_id %p\n", __func__, conn_param->qpn,
1899 ep->com.qp, cm_id);
1900
1901 /*
1902 * Allocate an active TID to initiate a TCP connection.
1903 */
1904 ep->atid = cxgb4_alloc_atid(dev->rdev.lldi.tids, ep);
1905 if (ep->atid == -1) {
1906 printk(KERN_ERR MOD "%s - cannot alloc atid.\n", __func__);
1907 err = -ENOMEM;
1908 goto fail2;
1909 }
1910
1911 PDBG("%s saddr 0x%x sport 0x%x raddr 0x%x rport 0x%x\n", __func__,
1912 ntohl(cm_id->local_addr.sin_addr.s_addr),
1913 ntohs(cm_id->local_addr.sin_port),
1914 ntohl(cm_id->remote_addr.sin_addr.s_addr),
1915 ntohs(cm_id->remote_addr.sin_port));
1916
1917 /* find a route */
1918 rt = find_route(dev,
1919 cm_id->local_addr.sin_addr.s_addr,
1920 cm_id->remote_addr.sin_addr.s_addr,
1921 cm_id->local_addr.sin_port,
1922 cm_id->remote_addr.sin_port, 0);
1923 if (!rt) {
1924 printk(KERN_ERR MOD "%s - cannot find route.\n", __func__);
1925 err = -EHOSTUNREACH;
1926 goto fail3;
1927 }
1928 ep->dst = &rt->dst;
1929
1930 /* get a l2t entry */
1931 if (ep->dst->neighbour->dev->flags & IFF_LOOPBACK) {
1932 PDBG("%s LOOPBACK\n", __func__);
1933 pdev = ip_dev_find(&init_net,
1934 cm_id->remote_addr.sin_addr.s_addr);
1935 ep->l2t = cxgb4_l2t_get(ep->com.dev->rdev.lldi.l2t,
1936 ep->dst->neighbour,
1937 pdev, 0);
1938 ep->mtu = pdev->mtu;
1939 ep->tx_chan = cxgb4_port_chan(pdev);
1940 ep->smac_idx = (cxgb4_port_viid(pdev) & 0x7F) << 1;
1941 step = ep->com.dev->rdev.lldi.ntxq /
1942 ep->com.dev->rdev.lldi.nchan;
1943 ep->txq_idx = cxgb4_port_idx(pdev) * step;
1944 step = ep->com.dev->rdev.lldi.nrxq /
1945 ep->com.dev->rdev.lldi.nchan;
1946 ep->ctrlq_idx = cxgb4_port_idx(pdev);
1947 ep->rss_qid = ep->com.dev->rdev.lldi.rxq_ids[
1948 cxgb4_port_idx(pdev) * step];
1949 dev_put(pdev);
1950 } else {
1951 ep->l2t = cxgb4_l2t_get(ep->com.dev->rdev.lldi.l2t,
1952 ep->dst->neighbour,
1953 ep->dst->neighbour->dev, 0);
1954 ep->mtu = dst_mtu(ep->dst);
1955 ep->tx_chan = cxgb4_port_chan(ep->dst->neighbour->dev);
1956 ep->smac_idx = (cxgb4_port_viid(ep->dst->neighbour->dev) &
1957 0x7F) << 1;
1958 step = ep->com.dev->rdev.lldi.ntxq /
1959 ep->com.dev->rdev.lldi.nchan;
1960 ep->txq_idx = cxgb4_port_idx(ep->dst->neighbour->dev) * step;
1961 ep->ctrlq_idx = cxgb4_port_idx(ep->dst->neighbour->dev);
1962 step = ep->com.dev->rdev.lldi.nrxq /
1963 ep->com.dev->rdev.lldi.nchan;
1964 ep->rss_qid = ep->com.dev->rdev.lldi.rxq_ids[
1965 cxgb4_port_idx(ep->dst->neighbour->dev) * step];
1966 }
1967 if (!ep->l2t) {
1968 printk(KERN_ERR MOD "%s - cannot alloc l2e.\n", __func__);
1969 err = -ENOMEM;
1970 goto fail4;
1971 }
1972
1973 PDBG("%s txq_idx %u tx_chan %u smac_idx %u rss_qid %u l2t_idx %u\n",
1974 __func__, ep->txq_idx, ep->tx_chan, ep->smac_idx, ep->rss_qid,
1975 ep->l2t->idx);
1976
1977 state_set(&ep->com, CONNECTING);
1978 ep->tos = 0;
1979 ep->com.local_addr = cm_id->local_addr;
1980 ep->com.remote_addr = cm_id->remote_addr;
1981
1982 /* send connect request to rnic */
1983 err = send_connect(ep);
1984 if (!err)
1985 goto out;
1986
1987 cxgb4_l2t_release(ep->l2t);
1988 fail4:
1989 dst_release(ep->dst);
1990 fail3:
1991 cxgb4_free_atid(ep->com.dev->rdev.lldi.tids, ep->atid);
1992 fail2:
1993 cm_id->rem_ref(cm_id);
1994 c4iw_put_ep(&ep->com);
1995 out:
1996 return err;
1997 }
1998
1999 int c4iw_create_listen(struct iw_cm_id *cm_id, int backlog)
2000 {
2001 int err = 0;
2002 struct c4iw_dev *dev = to_c4iw_dev(cm_id->device);
2003 struct c4iw_listen_ep *ep;
2004
2005
2006 might_sleep();
2007
2008 ep = alloc_ep(sizeof(*ep), GFP_KERNEL);
2009 if (!ep) {
2010 printk(KERN_ERR MOD "%s - cannot alloc ep.\n", __func__);
2011 err = -ENOMEM;
2012 goto fail1;
2013 }
2014 PDBG("%s ep %p\n", __func__, ep);
2015 cm_id->add_ref(cm_id);
2016 ep->com.cm_id = cm_id;
2017 ep->com.dev = dev;
2018 ep->backlog = backlog;
2019 ep->com.local_addr = cm_id->local_addr;
2020
2021 /*
2022 * Allocate a server TID.
2023 */
2024 ep->stid = cxgb4_alloc_stid(dev->rdev.lldi.tids, PF_INET, ep);
2025 if (ep->stid == -1) {
2026 printk(KERN_ERR MOD "%s - cannot alloc stid.\n", __func__);
2027 err = -ENOMEM;
2028 goto fail2;
2029 }
2030
2031 state_set(&ep->com, LISTEN);
2032 c4iw_init_wr_wait(&ep->com.wr_wait);
2033 err = cxgb4_create_server(ep->com.dev->rdev.lldi.ports[0], ep->stid,
2034 ep->com.local_addr.sin_addr.s_addr,
2035 ep->com.local_addr.sin_port,
2036 ep->com.dev->rdev.lldi.rxq_ids[0]);
2037 if (err)
2038 goto fail3;
2039
2040 /* wait for pass_open_rpl */
2041 err = c4iw_wait_for_reply(&ep->com.dev->rdev, &ep->com.wr_wait, 0, 0,
2042 __func__);
2043 if (!err) {
2044 cm_id->provider_data = ep;
2045 goto out;
2046 }
2047 fail3:
2048 cxgb4_free_stid(ep->com.dev->rdev.lldi.tids, ep->stid, PF_INET);
2049 fail2:
2050 cm_id->rem_ref(cm_id);
2051 c4iw_put_ep(&ep->com);
2052 fail1:
2053 out:
2054 return err;
2055 }
2056
2057 int c4iw_destroy_listen(struct iw_cm_id *cm_id)
2058 {
2059 int err;
2060 struct c4iw_listen_ep *ep = to_listen_ep(cm_id);
2061
2062 PDBG("%s ep %p\n", __func__, ep);
2063
2064 might_sleep();
2065 state_set(&ep->com, DEAD);
2066 c4iw_init_wr_wait(&ep->com.wr_wait);
2067 err = listen_stop(ep);
2068 if (err)
2069 goto done;
2070 err = c4iw_wait_for_reply(&ep->com.dev->rdev, &ep->com.wr_wait, 0, 0,
2071 __func__);
2072 cxgb4_free_stid(ep->com.dev->rdev.lldi.tids, ep->stid, PF_INET);
2073 done:
2074 cm_id->rem_ref(cm_id);
2075 c4iw_put_ep(&ep->com);
2076 return err;
2077 }
2078
2079 int c4iw_ep_disconnect(struct c4iw_ep *ep, int abrupt, gfp_t gfp)
2080 {
2081 int ret = 0;
2082 int close = 0;
2083 int fatal = 0;
2084 struct c4iw_rdev *rdev;
2085
2086 mutex_lock(&ep->com.mutex);
2087
2088 PDBG("%s ep %p state %s, abrupt %d\n", __func__, ep,
2089 states[ep->com.state], abrupt);
2090
2091 rdev = &ep->com.dev->rdev;
2092 if (c4iw_fatal_error(rdev)) {
2093 fatal = 1;
2094 close_complete_upcall(ep);
2095 ep->com.state = DEAD;
2096 }
2097 switch (ep->com.state) {
2098 case MPA_REQ_WAIT:
2099 case MPA_REQ_SENT:
2100 case MPA_REQ_RCVD:
2101 case MPA_REP_SENT:
2102 case FPDU_MODE:
2103 close = 1;
2104 if (abrupt)
2105 ep->com.state = ABORTING;
2106 else {
2107 ep->com.state = CLOSING;
2108 start_ep_timer(ep);
2109 }
2110 set_bit(CLOSE_SENT, &ep->com.flags);
2111 break;
2112 case CLOSING:
2113 if (!test_and_set_bit(CLOSE_SENT, &ep->com.flags)) {
2114 close = 1;
2115 if (abrupt) {
2116 stop_ep_timer(ep);
2117 ep->com.state = ABORTING;
2118 } else
2119 ep->com.state = MORIBUND;
2120 }
2121 break;
2122 case MORIBUND:
2123 case ABORTING:
2124 case DEAD:
2125 PDBG("%s ignoring disconnect ep %p state %u\n",
2126 __func__, ep, ep->com.state);
2127 break;
2128 default:
2129 BUG();
2130 break;
2131 }
2132
2133 mutex_unlock(&ep->com.mutex);
2134 if (close) {
2135 if (abrupt)
2136 ret = abort_connection(ep, NULL, gfp);
2137 else
2138 ret = send_halfclose(ep, gfp);
2139 if (ret)
2140 fatal = 1;
2141 }
2142 if (fatal)
2143 release_ep_resources(ep);
2144 return ret;
2145 }
2146
2147 static int async_event(struct c4iw_dev *dev, struct sk_buff *skb)
2148 {
2149 struct cpl_fw6_msg *rpl = cplhdr(skb);
2150 c4iw_ev_dispatch(dev, (struct t4_cqe *)&rpl->data[0]);
2151 return 0;
2152 }
2153
2154 /*
2155 * These are the real handlers that are called from a
2156 * work queue.
2157 */
2158 static c4iw_handler_func work_handlers[NUM_CPL_CMDS] = {
2159 [CPL_ACT_ESTABLISH] = act_establish,
2160 [CPL_ACT_OPEN_RPL] = act_open_rpl,
2161 [CPL_RX_DATA] = rx_data,
2162 [CPL_ABORT_RPL_RSS] = abort_rpl,
2163 [CPL_ABORT_RPL] = abort_rpl,
2164 [CPL_PASS_OPEN_RPL] = pass_open_rpl,
2165 [CPL_CLOSE_LISTSRV_RPL] = close_listsrv_rpl,
2166 [CPL_PASS_ACCEPT_REQ] = pass_accept_req,
2167 [CPL_PASS_ESTABLISH] = pass_establish,
2168 [CPL_PEER_CLOSE] = peer_close,
2169 [CPL_ABORT_REQ_RSS] = peer_abort,
2170 [CPL_CLOSE_CON_RPL] = close_con_rpl,
2171 [CPL_RDMA_TERMINATE] = terminate,
2172 [CPL_FW4_ACK] = fw4_ack,
2173 [CPL_FW6_MSG] = async_event
2174 };
2175
2176 static void process_timeout(struct c4iw_ep *ep)
2177 {
2178 struct c4iw_qp_attributes attrs;
2179 int abort = 1;
2180
2181 mutex_lock(&ep->com.mutex);
2182 PDBG("%s ep %p tid %u state %d\n", __func__, ep, ep->hwtid,
2183 ep->com.state);
2184 switch (ep->com.state) {
2185 case MPA_REQ_SENT:
2186 __state_set(&ep->com, ABORTING);
2187 connect_reply_upcall(ep, -ETIMEDOUT);
2188 break;
2189 case MPA_REQ_WAIT:
2190 __state_set(&ep->com, ABORTING);
2191 break;
2192 case CLOSING:
2193 case MORIBUND:
2194 if (ep->com.cm_id && ep->com.qp) {
2195 attrs.next_state = C4IW_QP_STATE_ERROR;
2196 c4iw_modify_qp(ep->com.qp->rhp,
2197 ep->com.qp, C4IW_QP_ATTR_NEXT_STATE,
2198 &attrs, 1);
2199 }
2200 __state_set(&ep->com, ABORTING);
2201 break;
2202 default:
2203 printk(KERN_ERR "%s unexpected state ep %p tid %u state %u\n",
2204 __func__, ep, ep->hwtid, ep->com.state);
2205 WARN_ON(1);
2206 abort = 0;
2207 }
2208 mutex_unlock(&ep->com.mutex);
2209 if (abort)
2210 abort_connection(ep, NULL, GFP_KERNEL);
2211 c4iw_put_ep(&ep->com);
2212 }
2213
2214 static void process_timedout_eps(void)
2215 {
2216 struct c4iw_ep *ep;
2217
2218 spin_lock_irq(&timeout_lock);
2219 while (!list_empty(&timeout_list)) {
2220 struct list_head *tmp;
2221
2222 tmp = timeout_list.next;
2223 list_del(tmp);
2224 spin_unlock_irq(&timeout_lock);
2225 ep = list_entry(tmp, struct c4iw_ep, entry);
2226 process_timeout(ep);
2227 spin_lock_irq(&timeout_lock);
2228 }
2229 spin_unlock_irq(&timeout_lock);
2230 }
2231
2232 static void process_work(struct work_struct *work)
2233 {
2234 struct sk_buff *skb = NULL;
2235 struct c4iw_dev *dev;
2236 struct cpl_act_establish *rpl;
2237 unsigned int opcode;
2238 int ret;
2239
2240 while ((skb = skb_dequeue(&rxq))) {
2241 rpl = cplhdr(skb);
2242 dev = *((struct c4iw_dev **) (skb->cb + sizeof(void *)));
2243 opcode = rpl->ot.opcode;
2244
2245 BUG_ON(!work_handlers[opcode]);
2246 ret = work_handlers[opcode](dev, skb);
2247 if (!ret)
2248 kfree_skb(skb);
2249 }
2250 process_timedout_eps();
2251 }
2252
2253 static DECLARE_WORK(skb_work, process_work);
2254
2255 static void ep_timeout(unsigned long arg)
2256 {
2257 struct c4iw_ep *ep = (struct c4iw_ep *)arg;
2258
2259 spin_lock(&timeout_lock);
2260 list_add_tail(&ep->entry, &timeout_list);
2261 spin_unlock(&timeout_lock);
2262 queue_work(workq, &skb_work);
2263 }
2264
2265 /*
2266 * All the CM events are handled on a work queue to have a safe context.
2267 */
2268 static int sched(struct c4iw_dev *dev, struct sk_buff *skb)
2269 {
2270
2271 /*
2272 * Save dev in the skb->cb area.
2273 */
2274 *((struct c4iw_dev **) (skb->cb + sizeof(void *))) = dev;
2275
2276 /*
2277 * Queue the skb and schedule the worker thread.
2278 */
2279 skb_queue_tail(&rxq, skb);
2280 queue_work(workq, &skb_work);
2281 return 0;
2282 }
2283
2284 static int set_tcb_rpl(struct c4iw_dev *dev, struct sk_buff *skb)
2285 {
2286 struct cpl_set_tcb_rpl *rpl = cplhdr(skb);
2287
2288 if (rpl->status != CPL_ERR_NONE) {
2289 printk(KERN_ERR MOD "Unexpected SET_TCB_RPL status %u "
2290 "for tid %u\n", rpl->status, GET_TID(rpl));
2291 }
2292 kfree_skb(skb);
2293 return 0;
2294 }
2295
2296 static int fw6_msg(struct c4iw_dev *dev, struct sk_buff *skb)
2297 {
2298 struct cpl_fw6_msg *rpl = cplhdr(skb);
2299 struct c4iw_wr_wait *wr_waitp;
2300 int ret;
2301
2302 PDBG("%s type %u\n", __func__, rpl->type);
2303
2304 switch (rpl->type) {
2305 case 1:
2306 ret = (int)((be64_to_cpu(rpl->data[0]) >> 8) & 0xff);
2307 wr_waitp = (struct c4iw_wr_wait *)(__force unsigned long) rpl->data[1];
2308 PDBG("%s wr_waitp %p ret %u\n", __func__, wr_waitp, ret);
2309 if (wr_waitp) {
2310 if (ret)
2311 wr_waitp->ret = -ret;
2312 else
2313 wr_waitp->ret = 0;
2314 wr_waitp->done = 1;
2315 wake_up(&wr_waitp->wait);
2316 }
2317 kfree_skb(skb);
2318 break;
2319 case 2:
2320 sched(dev, skb);
2321 break;
2322 default:
2323 printk(KERN_ERR MOD "%s unexpected fw6 msg type %u\n", __func__,
2324 rpl->type);
2325 kfree_skb(skb);
2326 break;
2327 }
2328 return 0;
2329 }
2330
2331 /*
2332 * Most upcalls from the T4 Core go to sched() to
2333 * schedule the processing on a work queue.
2334 */
2335 c4iw_handler_func c4iw_handlers[NUM_CPL_CMDS] = {
2336 [CPL_ACT_ESTABLISH] = sched,
2337 [CPL_ACT_OPEN_RPL] = sched,
2338 [CPL_RX_DATA] = sched,
2339 [CPL_ABORT_RPL_RSS] = sched,
2340 [CPL_ABORT_RPL] = sched,
2341 [CPL_PASS_OPEN_RPL] = sched,
2342 [CPL_CLOSE_LISTSRV_RPL] = sched,
2343 [CPL_PASS_ACCEPT_REQ] = sched,
2344 [CPL_PASS_ESTABLISH] = sched,
2345 [CPL_PEER_CLOSE] = sched,
2346 [CPL_CLOSE_CON_RPL] = sched,
2347 [CPL_ABORT_REQ_RSS] = sched,
2348 [CPL_RDMA_TERMINATE] = sched,
2349 [CPL_FW4_ACK] = sched,
2350 [CPL_SET_TCB_RPL] = set_tcb_rpl,
2351 [CPL_FW6_MSG] = fw6_msg
2352 };
2353
2354 int __init c4iw_cm_init(void)
2355 {
2356 spin_lock_init(&timeout_lock);
2357 skb_queue_head_init(&rxq);
2358
2359 workq = create_singlethread_workqueue("iw_cxgb4");
2360 if (!workq)
2361 return -ENOMEM;
2362
2363 return 0;
2364 }
2365
2366 void __exit c4iw_cm_term(void)
2367 {
2368 WARN_ON(!list_empty(&timeout_list));
2369 flush_workqueue(workq);
2370 destroy_workqueue(workq);
2371 }