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ip: ip_ra_control() rcu fix
[GitHub/mt8127/android_kernel_alcatel_ttab.git] / drivers / infiniband / hw / cxgb3 / iwch_cm.c
CommitLineData
b038ced7
SW		 1/*
2 * Copyright (c) 2006 Chelsio, Inc. All rights reserved.
b038ced7
SW		 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>
5a0e3ad6 34#include <linux/slab.h>
b038ced7
SW		 35#include <linux/workqueue.h>
36#include <linux/skbuff.h>
37#include <linux/timer.h>
38#include <linux/notifier.h>
8704e9a8 39#include <linux/inetdevice.h>
b038ced7
SW		 40
41#include <net/neighbour.h>
42#include <net/netevent.h>
43#include <net/route.h>
44
45#include "tcb.h"
46#include "cxgb3_offload.h"
47#include "iwch.h"
48#include "iwch_provider.h"
49#include "iwch_cm.h"
50
51static char *states[] = {
52 "idle",
53 "listen",
54 "connecting",
55 "mpa_wait_req",
56 "mpa_req_sent",
57 "mpa_req_rcvd",
58 "mpa_rep_sent",
59 "fpdu_mode",
60 "aborting",
61 "closing",
62 "moribund",
63 "dead",
64 NULL,
65};
66
f8b0dfd1
SW		 67int peer2peer = 0;
68module_param(peer2peer, int, 0644);
69MODULE_PARM_DESC(peer2peer, "Support peer2peer ULPs (default=0)");
70
77a8d574 71static int ep_timeout_secs = 60;
e54664c0 72module_param(ep_timeout_secs, int, 0644);
b038ced7 73MODULE_PARM_DESC(ep_timeout_secs, "CM Endpoint operation timeout "
77a8d574 74 "in seconds (default=60)");
b038ced7
SW		 75
76static int mpa_rev = 1;
e54664c0 77module_param(mpa_rev, int, 0644);
b038ced7
SW		 78MODULE_PARM_DESC(mpa_rev, "MPA Revision, 0 supports amso1100, "
79 "1 is spec compliant. (default=1)");
80
81static int markers_enabled = 0;
e54664c0 82module_param(markers_enabled, int, 0644);
b038ced7
SW		 83MODULE_PARM_DESC(markers_enabled, "Enable MPA MARKERS (default(0)=disabled)");
84
85static int crc_enabled = 1;
e54664c0 86module_param(crc_enabled, int, 0644);
b038ced7
SW		 87MODULE_PARM_DESC(crc_enabled, "Enable MPA CRC (default(1)=enabled)");
88
89static int rcv_win = 256 * 1024;
e54664c0 90module_param(rcv_win, int, 0644);
b038ced7
SW		 91MODULE_PARM_DESC(rcv_win, "TCP receive window in bytes (default=256)");
92
93static int snd_win = 32 * 1024;
e54664c0 94module_param(snd_win, int, 0644);
b038ced7
SW		 95MODULE_PARM_DESC(snd_win, "TCP send window in bytes (default=32KB)");
96
97static unsigned int nocong = 0;
e54664c0 98module_param(nocong, uint, 0644);
b038ced7
SW		 99MODULE_PARM_DESC(nocong, "Turn off congestion control (default=0)");
100
101static unsigned int cong_flavor = 1;
e54664c0 102module_param(cong_flavor, uint, 0644);
b038ced7
SW		 103MODULE_PARM_DESC(cong_flavor, "TCP Congestion control flavor (default=1)");
104
b038ced7 105static struct workqueue_struct *workq;
b038ced7
SW		 106
107static struct sk_buff_head rxq;
b038ced7
SW		 108
109static struct sk_buff *get_skb(struct sk_buff *skb, int len, gfp_t gfp);
110static void ep_timeout(unsigned long arg);
111static void connect_reply_upcall(struct iwch_ep *ep, int status);
112
113static void start_ep_timer(struct iwch_ep *ep)
114{
33718363 115 PDBG("%s ep %p\n", __func__, ep);
b038ced7 116 if (timer_pending(&ep->timer)) {
33718363 117 PDBG("%s stopped / restarted timer ep %p\n", __func__, ep);
b038ced7
SW		 118 del_timer_sync(&ep->timer);
119 } else
120 get_ep(&ep->com);
121 ep->timer.expires = jiffies + ep_timeout_secs * HZ;
122 ep->timer.data = (unsigned long)ep;
123 ep->timer.function = ep_timeout;
124 add_timer(&ep->timer);
125}
126
127static void stop_ep_timer(struct iwch_ep *ep)
128{
33718363 129 PDBG("%s ep %p\n", __func__, ep);
989a1780
SW		 130 if (!timer_pending(&ep->timer)) {
131 printk(KERN_ERR "%s timer stopped when its not running! ep %p state %u\n",
132 __func__, ep, ep->com.state);
133 WARN_ON(1);
134 return;
135 }
b038ced7
SW		 136 del_timer_sync(&ep->timer);
137 put_ep(&ep->com);
138}
139
04b5d028
SW		 140int iwch_l2t_send(struct t3cdev *tdev, struct sk_buff *skb, struct l2t_entry *l2e)
141{
142 int error = 0;
143 struct cxio_rdev *rdev;
144
145 rdev = (struct cxio_rdev *)tdev->ulp;
146 if (cxio_fatal_error(rdev)) {
147 kfree_skb(skb);
148 return -EIO;
149 }
150 error = l2t_send(tdev, skb, l2e);
73a203d2 151 if (error < 0)
04b5d028
SW		 152 kfree_skb(skb);
153 return error;
154}
155
156int iwch_cxgb3_ofld_send(struct t3cdev *tdev, struct sk_buff *skb)
157{
158 int error = 0;
159 struct cxio_rdev *rdev;
160
161 rdev = (struct cxio_rdev *)tdev->ulp;
162 if (cxio_fatal_error(rdev)) {
163 kfree_skb(skb);
164 return -EIO;
165 }
166 error = cxgb3_ofld_send(tdev, skb);
73a203d2 167 if (error < 0)
04b5d028
SW		 168 kfree_skb(skb);
169 return error;
170}
171
b038ced7
SW		 172static void release_tid(struct t3cdev *tdev, u32 hwtid, struct sk_buff *skb)
173{
174 struct cpl_tid_release *req;
175
176 skb = get_skb(skb, sizeof *req, GFP_KERNEL);
177 if (!skb)
178 return;
179 req = (struct cpl_tid_release *) skb_put(skb, sizeof(*req));
180 req->wr.wr_hi = htonl(V_WR_OP(FW_WROPCODE_FORWARD));
181 OPCODE_TID(req) = htonl(MK_OPCODE_TID(CPL_TID_RELEASE, hwtid));
182 skb->priority = CPL_PRIORITY_SETUP;
04b5d028 183 iwch_cxgb3_ofld_send(tdev, skb);
b038ced7
SW		 184 return;
185}
186
187int iwch_quiesce_tid(struct iwch_ep *ep)
188{
189 struct cpl_set_tcb_field *req;
190 struct sk_buff *skb = get_skb(NULL, sizeof(*req), GFP_KERNEL);
191
192 if (!skb)
193 return -ENOMEM;
194 req = (struct cpl_set_tcb_field *) skb_put(skb, sizeof(*req));
195 req->wr.wr_hi = htonl(V_WR_OP(FW_WROPCODE_FORWARD));
196 req->wr.wr_lo = htonl(V_WR_TID(ep->hwtid));
197 OPCODE_TID(req) = htonl(MK_OPCODE_TID(CPL_SET_TCB_FIELD, ep->hwtid));
198 req->reply = 0;
199 req->cpu_idx = 0;
200 req->word = htons(W_TCB_RX_QUIESCE);
201 req->mask = cpu_to_be64(1ULL << S_TCB_RX_QUIESCE);
202 req->val = cpu_to_be64(1 << S_TCB_RX_QUIESCE);
203
204 skb->priority = CPL_PRIORITY_DATA;
04b5d028 205 return iwch_cxgb3_ofld_send(ep->com.tdev, skb);
b038ced7
SW		 206}
207
208int iwch_resume_tid(struct iwch_ep *ep)
209{
210 struct cpl_set_tcb_field *req;
211 struct sk_buff *skb = get_skb(NULL, sizeof(*req), GFP_KERNEL);
212
213 if (!skb)
214 return -ENOMEM;
215 req = (struct cpl_set_tcb_field *) skb_put(skb, sizeof(*req));
216 req->wr.wr_hi = htonl(V_WR_OP(FW_WROPCODE_FORWARD));
217 req->wr.wr_lo = htonl(V_WR_TID(ep->hwtid));
218 OPCODE_TID(req) = htonl(MK_OPCODE_TID(CPL_SET_TCB_FIELD, ep->hwtid));
219 req->reply = 0;
220 req->cpu_idx = 0;
221 req->word = htons(W_TCB_RX_QUIESCE);
222 req->mask = cpu_to_be64(1ULL << S_TCB_RX_QUIESCE);
223 req->val = 0;
224
225 skb->priority = CPL_PRIORITY_DATA;
04b5d028 226 return iwch_cxgb3_ofld_send(ep->com.tdev, skb);
b038ced7
SW		 227}
228
229static void set_emss(struct iwch_ep *ep, u16 opt)
230{
33718363 231 PDBG("%s ep %p opt %u\n", __func__, ep, opt);
b038ced7
SW		 232 ep->emss = T3C_DATA(ep->com.tdev)->mtus[G_TCPOPT_MSS(opt)] - 40;
233 if (G_TCPOPT_TSTAMP(opt))
234 ep->emss -= 12;
235 if (ep->emss < 128)
236 ep->emss = 128;
237 PDBG("emss=%d\n", ep->emss);
238}
239
240static enum iwch_ep_state state_read(struct iwch_ep_common *epc)
241{
242 unsigned long flags;
243 enum iwch_ep_state state;
244
245 spin_lock_irqsave(&epc->lock, flags);
246 state = epc->state;
247 spin_unlock_irqrestore(&epc->lock, flags);
248 return state;
249}
250
2b540355 251static void __state_set(struct iwch_ep_common *epc, enum iwch_ep_state new)
b038ced7
SW		 252{
253 epc->state = new;
254}
255
256static void state_set(struct iwch_ep_common *epc, enum iwch_ep_state new)
257{
258 unsigned long flags;
259
260 spin_lock_irqsave(&epc->lock, flags);
33718363 261 PDBG("%s - %s -> %s\n", __func__, states[epc->state], states[new]);
b038ced7
SW		 262 __state_set(epc, new);
263 spin_unlock_irqrestore(&epc->lock, flags);
264 return;
265}
266
267static void *alloc_ep(int size, gfp_t gfp)
268{
269 struct iwch_ep_common *epc;
270
dd00cc48 271 epc = kzalloc(size, gfp);
b038ced7 272 if (epc) {
b038ced7
SW		 273 kref_init(&epc->kref);
274 spin_lock_init(&epc->lock);
275 init_waitqueue_head(&epc->waitq);
276 }
33718363 277 PDBG("%s alloc ep %p\n", __func__, epc);
b038ced7
SW		 278 return epc;
279}
280
281void __free_ep(struct kref *kref)
282{
874d8df5
SW		 283 struct iwch_ep *ep;
284 ep = container_of(container_of(kref, struct iwch_ep_common, kref),
285 struct iwch_ep, com);
286 PDBG("%s ep %p state %s\n", __func__, ep, states[state_read(&ep->com)]);
6e47fe43 287 if (test_bit(RELEASE_RESOURCES, &ep->com.flags)) {
874d8df5
SW		 288 cxgb3_remove_tid(ep->com.tdev, (void *)ep, ep->hwtid);
289 dst_release(ep->dst);
290 l2t_release(L2DATA(ep->com.tdev), ep->l2t);
291 }
292 kfree(ep);
b038ced7
SW		 293}
294
295static void release_ep_resources(struct iwch_ep *ep)
296{
33718363 297 PDBG("%s ep %p tid %d\n", __func__, ep, ep->hwtid);
6e47fe43 298 set_bit(RELEASE_RESOURCES, &ep->com.flags);
b038ced7
SW		 299 put_ep(&ep->com);
300}
301
b038ced7
SW		 302static int status2errno(int status)
303{
304 switch (status) {
305 case CPL_ERR_NONE:
306 return 0;
307 case CPL_ERR_CONN_RESET:
308 return -ECONNRESET;
309 case CPL_ERR_ARP_MISS:
310 return -EHOSTUNREACH;
311 case CPL_ERR_CONN_TIMEDOUT:
312 return -ETIMEDOUT;
313 case CPL_ERR_TCAM_FULL:
314 return -ENOMEM;
315 case CPL_ERR_CONN_EXIST:
316 return -EADDRINUSE;
317 default:
318 return -EIO;
319 }
320}
321
322/*
323 * Try and reuse skbs already allocated...
324 */
325static struct sk_buff *get_skb(struct sk_buff *skb, int len, gfp_t gfp)
326{
1f6a849b 327 if (skb && !skb_is_nonlinear(skb) && !skb_cloned(skb)) {
b038ced7
SW		 328 skb_trim(skb, 0);
329 skb_get(skb);
330 } else {
331 skb = alloc_skb(len, gfp);
332 }
333 return skb;
334}
335
336static struct rtable *find_route(struct t3cdev *dev, __be32 local_ip,
337 __be32 peer_ip, __be16 local_port,
338 __be16 peer_port, u8 tos)
339{
340 struct rtable *rt;
341 struct flowi fl = {
342 .oif = 0,
343 .nl_u = {
344 .ip4_u = {
345 .daddr = peer_ip,
346 .saddr = local_ip,
347 .tos = tos}
348 },
349 .proto = IPPROTO_TCP,
350 .uli_u = {
351 .ports = {
352 .sport = local_port,
353 .dport = peer_port}
354 }
355 };
356
f1b050bf 357 if (ip_route_output_flow(&init_net, &rt, &fl, NULL, 0))
b038ced7
SW		 358 return NULL;
359 return rt;
360}
361
362static unsigned int find_best_mtu(const struct t3c_data *d, unsigned short mtu)
363{
364 int i = 0;
365
366 while (i < d->nmtus - 1 && d->mtus[i + 1] <= mtu)
367 ++i;
368 return i;
369}
370
371static void arp_failure_discard(struct t3cdev *dev, struct sk_buff *skb)
372{
33718363 373 PDBG("%s t3cdev %p\n", __func__, dev);
b038ced7
SW		 374 kfree_skb(skb);
375}
376
377/*
378 * Handle an ARP failure for an active open.
379 */
380static void act_open_req_arp_failure(struct t3cdev *dev, struct sk_buff *skb)
381{
382 printk(KERN_ERR MOD "ARP failure duing connect\n");
383 kfree_skb(skb);
384}
385
386/*
387 * Handle an ARP failure for a CPL_ABORT_REQ. Change it into a no RST variant
388 * and send it along.
389 */
390static void abort_arp_failure(struct t3cdev *dev, struct sk_buff *skb)
391{
392 struct cpl_abort_req *req = cplhdr(skb);
393
33718363 394 PDBG("%s t3cdev %p\n", __func__, dev);
b038ced7 395 req->cmd = CPL_ABORT_NO_RST;
04b5d028 396 iwch_cxgb3_ofld_send(dev, skb);
b038ced7
SW		 397}
398
399static int send_halfclose(struct iwch_ep *ep, gfp_t gfp)
400{
401 struct cpl_close_con_req *req;
402 struct sk_buff *skb;
403
33718363 404 PDBG("%s ep %p\n", __func__, ep);
b038ced7
SW		 405 skb = get_skb(NULL, sizeof(*req), gfp);
406 if (!skb) {
33718363 407 printk(KERN_ERR MOD "%s - failed to alloc skb\n", __func__);
b038ced7
SW		 408 return -ENOMEM;
409 }
410 skb->priority = CPL_PRIORITY_DATA;
411 set_arp_failure_handler(skb, arp_failure_discard);
412 req = (struct cpl_close_con_req *) skb_put(skb, sizeof(*req));
413 req->wr.wr_hi = htonl(V_WR_OP(FW_WROPCODE_OFLD_CLOSE_CON));
414 req->wr.wr_lo = htonl(V_WR_TID(ep->hwtid));
415 OPCODE_TID(req) = htonl(MK_OPCODE_TID(CPL_CLOSE_CON_REQ, ep->hwtid));
04b5d028 416 return iwch_l2t_send(ep->com.tdev, skb, ep->l2t);
b038ced7
SW		 417}
418
419static int send_abort(struct iwch_ep *ep, struct sk_buff *skb, gfp_t gfp)
420{
421 struct cpl_abort_req *req;
422
33718363 423 PDBG("%s ep %p\n", __func__, ep);
b038ced7
SW		 424 skb = get_skb(skb, sizeof(*req), gfp);
425 if (!skb) {
426 printk(KERN_ERR MOD "%s - failed to alloc skb.\n",
33718363 427 __func__);
b038ced7
SW		 428 return -ENOMEM;
429 }
430 skb->priority = CPL_PRIORITY_DATA;
431 set_arp_failure_handler(skb, abort_arp_failure);
432 req = (struct cpl_abort_req *) skb_put(skb, sizeof(*req));
433 req->wr.wr_hi = htonl(V_WR_OP(FW_WROPCODE_OFLD_HOST_ABORT_CON_REQ));
434 req->wr.wr_lo = htonl(V_WR_TID(ep->hwtid));
435 OPCODE_TID(req) = htonl(MK_OPCODE_TID(CPL_ABORT_REQ, ep->hwtid));
436 req->cmd = CPL_ABORT_SEND_RST;
04b5d028 437 return iwch_l2t_send(ep->com.tdev, skb, ep->l2t);
b038ced7
SW		 438}
439
440static int send_connect(struct iwch_ep *ep)
441{
442 struct cpl_act_open_req *req;
443 struct sk_buff *skb;
444 u32 opt0h, opt0l, opt2;
445 unsigned int mtu_idx;
446 int wscale;
447
33718363 448 PDBG("%s ep %p\n", __func__, ep);
b038ced7
SW		 449
450 skb = get_skb(NULL, sizeof(*req), GFP_KERNEL);
451 if (!skb) {
452 printk(KERN_ERR MOD "%s - failed to alloc skb.\n",
33718363 453 __func__);
b038ced7
SW		 454 return -ENOMEM;
455 }
456 mtu_idx = find_best_mtu(T3C_DATA(ep->com.tdev), dst_mtu(ep->dst));
457 wscale = compute_wscale(rcv_win);
458 opt0h = V_NAGLE(0) |
459 V_NO_CONG(nocong) |
460 V_KEEP_ALIVE(1) |
461 F_TCAM_BYPASS |
462 V_WND_SCALE(wscale) |
463 V_MSS_IDX(mtu_idx) |
464 V_L2T_IDX(ep->l2t->idx) | V_TX_CHANNEL(ep->l2t->smt_idx);
465 opt0l = V_TOS((ep->tos >> 2) & M_TOS) | V_RCV_BUFSIZ(rcv_win>>10);
466 opt2 = V_FLAVORS_VALID(1) | V_CONG_CONTROL_FLAVOR(cong_flavor);
467 skb->priority = CPL_PRIORITY_SETUP;
468 set_arp_failure_handler(skb, act_open_req_arp_failure);
469
470 req = (struct cpl_act_open_req *) skb_put(skb, sizeof(*req));
471 req->wr.wr_hi = htonl(V_WR_OP(FW_WROPCODE_FORWARD));
472 OPCODE_TID(req) = htonl(MK_OPCODE_TID(CPL_ACT_OPEN_REQ, ep->atid));
473 req->local_port = ep->com.local_addr.sin_port;
474 req->peer_port = ep->com.remote_addr.sin_port;
475 req->local_ip = ep->com.local_addr.sin_addr.s_addr;
476 req->peer_ip = ep->com.remote_addr.sin_addr.s_addr;
477 req->opt0h = htonl(opt0h);
478 req->opt0l = htonl(opt0l);
479 req->params = 0;
480 req->opt2 = htonl(opt2);
04b5d028 481 return iwch_l2t_send(ep->com.tdev, skb, ep->l2t);
b038ced7
SW		 482}
483
484static void send_mpa_req(struct iwch_ep *ep, struct sk_buff *skb)
485{
486 int mpalen;
487 struct tx_data_wr *req;
488 struct mpa_message *mpa;
489 int len;
490
33718363 491 PDBG("%s ep %p pd_len %d\n", __func__, ep, ep->plen);
b038ced7
SW		 492
493 BUG_ON(skb_cloned(skb));
494
495 mpalen = sizeof(*mpa) + ep->plen;
4305b541 496 if (skb->data + mpalen + sizeof(*req) > skb_end_pointer(skb)) {
b038ced7
SW		 497 kfree_skb(skb);
498 skb=alloc_skb(mpalen + sizeof(*req), GFP_KERNEL);
499 if (!skb) {
500 connect_reply_upcall(ep, -ENOMEM);
501 return;
502 }
503 }
504 skb_trim(skb, 0);
505 skb_reserve(skb, sizeof(*req));
506 skb_put(skb, mpalen);
507 skb->priority = CPL_PRIORITY_DATA;
508 mpa = (struct mpa_message *) skb->data;
509 memset(mpa, 0, sizeof(*mpa));
510 memcpy(mpa->key, MPA_KEY_REQ, sizeof(mpa->key));
511 mpa->flags = (crc_enabled ? MPA_CRC : 0) |
512 (markers_enabled ? MPA_MARKERS : 0);
513 mpa->private_data_size = htons(ep->plen);
514 mpa->revision = mpa_rev;
515
516 if (ep->plen)
517 memcpy(mpa->private_data, ep->mpa_pkt + sizeof(*mpa), ep->plen);
518
519 /*
520 * Reference the mpa skb. This ensures the data area
521 * will remain in memory until the hw acks the tx.
522 * Function tx_ack() will deref it.
523 */
524 skb_get(skb);
525 set_arp_failure_handler(skb, arp_failure_discard);
badff6d0 526 skb_reset_transport_header(skb);
b038ced7
SW		 527 len = skb->len;
528 req = (struct tx_data_wr *) skb_push(skb, sizeof(*req));
f8b0dfd1 529 req->wr_hi = htonl(V_WR_OP(FW_WROPCODE_OFLD_TX_DATA)|F_WR_COMPL);
b038ced7
SW		 530 req->wr_lo = htonl(V_WR_TID(ep->hwtid));
531 req->len = htonl(len);
532 req->param = htonl(V_TX_PORT(ep->l2t->smt_idx) |
533 V_TX_SNDBUF(snd_win>>15));
de3d3530 534 req->flags = htonl(F_TX_INIT);
b038ced7
SW		 535 req->sndseq = htonl(ep->snd_seq);
536 BUG_ON(ep->mpa_skb);
537 ep->mpa_skb = skb;
04b5d028 538 iwch_l2t_send(ep->com.tdev, skb, ep->l2t);
b038ced7
SW		 539 start_ep_timer(ep);
540 state_set(&ep->com, MPA_REQ_SENT);
541 return;
542}
543
544static int send_mpa_reject(struct iwch_ep *ep, const void *pdata, u8 plen)
545{
546 int mpalen;
547 struct tx_data_wr *req;
548 struct mpa_message *mpa;
549 struct sk_buff *skb;
550
33718363 551 PDBG("%s ep %p plen %d\n", __func__, ep, plen);
b038ced7
SW		 552
553 mpalen = sizeof(*mpa) + plen;
554
555 skb = get_skb(NULL, mpalen + sizeof(*req), GFP_KERNEL);
556 if (!skb) {
33718363 557 printk(KERN_ERR MOD "%s - cannot alloc skb!\n", __func__);
b038ced7
SW		 558 return -ENOMEM;
559 }
560 skb_reserve(skb, sizeof(*req));
561 mpa = (struct mpa_message *) skb_put(skb, mpalen);
562 memset(mpa, 0, sizeof(*mpa));
563 memcpy(mpa->key, MPA_KEY_REP, sizeof(mpa->key));
564 mpa->flags = MPA_REJECT;
565 mpa->revision = mpa_rev;
566 mpa->private_data_size = htons(plen);
567 if (plen)
568 memcpy(mpa->private_data, pdata, plen);
569
570 /*
571 * Reference the mpa skb again. This ensures the data area
572 * will remain in memory until the hw acks the tx.
573 * Function tx_ack() will deref it.
574 */
575 skb_get(skb);
576 skb->priority = CPL_PRIORITY_DATA;
577 set_arp_failure_handler(skb, arp_failure_discard);
badff6d0 578 skb_reset_transport_header(skb);
b038ced7 579 req = (struct tx_data_wr *) skb_push(skb, sizeof(*req));
f8b0dfd1 580 req->wr_hi = htonl(V_WR_OP(FW_WROPCODE_OFLD_TX_DATA)|F_WR_COMPL);
b038ced7
SW		 581 req->wr_lo = htonl(V_WR_TID(ep->hwtid));
582 req->len = htonl(mpalen);
583 req->param = htonl(V_TX_PORT(ep->l2t->smt_idx) |
584 V_TX_SNDBUF(snd_win>>15));
de3d3530 585 req->flags = htonl(F_TX_INIT);
b038ced7
SW		 586 req->sndseq = htonl(ep->snd_seq);
587 BUG_ON(ep->mpa_skb);
588 ep->mpa_skb = skb;
04b5d028 589 return iwch_l2t_send(ep->com.tdev, skb, ep->l2t);
b038ced7
SW		 590}
591
592static int send_mpa_reply(struct iwch_ep *ep, const void *pdata, u8 plen)
593{
594 int mpalen;
595 struct tx_data_wr *req;
596 struct mpa_message *mpa;
597 int len;
598 struct sk_buff *skb;
599
33718363 600 PDBG("%s ep %p plen %d\n", __func__, ep, plen);
b038ced7
SW		 601
602 mpalen = sizeof(*mpa) + plen;
603
604 skb = get_skb(NULL, mpalen + sizeof(*req), GFP_KERNEL);
605 if (!skb) {
33718363 606 printk(KERN_ERR MOD "%s - cannot alloc skb!\n", __func__);
b038ced7
SW		 607 return -ENOMEM;
608 }
609 skb->priority = CPL_PRIORITY_DATA;
610 skb_reserve(skb, sizeof(*req));
611 mpa = (struct mpa_message *) skb_put(skb, mpalen);
612 memset(mpa, 0, sizeof(*mpa));
613 memcpy(mpa->key, MPA_KEY_REP, sizeof(mpa->key));
614 mpa->flags = (ep->mpa_attr.crc_enabled ? MPA_CRC : 0) |
615 (markers_enabled ? MPA_MARKERS : 0);
616 mpa->revision = mpa_rev;
617 mpa->private_data_size = htons(plen);
618 if (plen)
619 memcpy(mpa->private_data, pdata, plen);
620
621 /*
622 * Reference the mpa skb. This ensures the data area
623 * will remain in memory until the hw acks the tx.
624 * Function tx_ack() will deref it.
625 */
626 skb_get(skb);
627 set_arp_failure_handler(skb, arp_failure_discard);
badff6d0 628 skb_reset_transport_header(skb);
b038ced7
SW		 629 len = skb->len;
630 req = (struct tx_data_wr *) skb_push(skb, sizeof(*req));
f8b0dfd1 631 req->wr_hi = htonl(V_WR_OP(FW_WROPCODE_OFLD_TX_DATA)|F_WR_COMPL);
b038ced7
SW		 632 req->wr_lo = htonl(V_WR_TID(ep->hwtid));
633 req->len = htonl(len);
634 req->param = htonl(V_TX_PORT(ep->l2t->smt_idx) |
635 V_TX_SNDBUF(snd_win>>15));
de3d3530 636 req->flags = htonl(F_TX_INIT);
b038ced7
SW		 637 req->sndseq = htonl(ep->snd_seq);
638 ep->mpa_skb = skb;
639 state_set(&ep->com, MPA_REP_SENT);
04b5d028 640 return iwch_l2t_send(ep->com.tdev, skb, ep->l2t);
b038ced7
SW		 641}
642
643static int act_establish(struct t3cdev *tdev, struct sk_buff *skb, void *ctx)
644{
645 struct iwch_ep *ep = ctx;
646 struct cpl_act_establish *req = cplhdr(skb);
647 unsigned int tid = GET_TID(req);
648
33718363 649 PDBG("%s ep %p tid %d\n", __func__, ep, tid);
b038ced7
SW		 650
651 dst_confirm(ep->dst);
652
653 /* setup the hwtid for this connection */
654 ep->hwtid = tid;
655 cxgb3_insert_tid(ep->com.tdev, &t3c_client, ep, tid);
656
657 ep->snd_seq = ntohl(req->snd_isn);
de3d3530 658 ep->rcv_seq = ntohl(req->rcv_isn);
b038ced7
SW		 659
660 set_emss(ep, ntohs(req->tcp_opt));
661
662 /* dealloc the atid */
663 cxgb3_free_atid(ep->com.tdev, ep->atid);
664
665 /* start MPA negotiation */
666 send_mpa_req(ep, skb);
667
668 return 0;
669}
670
671static void abort_connection(struct iwch_ep *ep, struct sk_buff *skb, gfp_t gfp)
672{
673 PDBG("%s ep %p\n", __FILE__, ep);
674 state_set(&ep->com, ABORTING);
675 send_abort(ep, skb, gfp);
676}
677
678static void close_complete_upcall(struct iwch_ep *ep)
679{
680 struct iw_cm_event event;
681
33718363 682 PDBG("%s ep %p\n", __func__, ep);
b038ced7
SW		 683 memset(&event, 0, sizeof(event));
684 event.event = IW_CM_EVENT_CLOSE;
685 if (ep->com.cm_id) {
686 PDBG("close complete delivered ep %p cm_id %p tid %d\n",
687 ep, ep->com.cm_id, ep->hwtid);
688 ep->com.cm_id->event_handler(ep->com.cm_id, &event);
689 ep->com.cm_id->rem_ref(ep->com.cm_id);
690 ep->com.cm_id = NULL;
691 ep->com.qp = NULL;
692 }
693}
694
695static void peer_close_upcall(struct iwch_ep *ep)
696{
697 struct iw_cm_event event;
698
33718363 699 PDBG("%s ep %p\n", __func__, ep);
b038ced7
SW		 700 memset(&event, 0, sizeof(event));
701 event.event = IW_CM_EVENT_DISCONNECT;
702 if (ep->com.cm_id) {
703 PDBG("peer close delivered ep %p cm_id %p tid %d\n",
704 ep, ep->com.cm_id, ep->hwtid);
705 ep->com.cm_id->event_handler(ep->com.cm_id, &event);
706 }
707}
708
709static void peer_abort_upcall(struct iwch_ep *ep)
710{
711 struct iw_cm_event event;
712
33718363 713 PDBG("%s ep %p\n", __func__, ep);
b038ced7
SW		 714 memset(&event, 0, sizeof(event));
715 event.event = IW_CM_EVENT_CLOSE;
716 event.status = -ECONNRESET;
717 if (ep->com.cm_id) {
718 PDBG("abort delivered ep %p cm_id %p tid %d\n", ep,
719 ep->com.cm_id, ep->hwtid);
720 ep->com.cm_id->event_handler(ep->com.cm_id, &event);
721 ep->com.cm_id->rem_ref(ep->com.cm_id);
722 ep->com.cm_id = NULL;
723 ep->com.qp = NULL;
724 }
725}
726
727static void connect_reply_upcall(struct iwch_ep *ep, int status)
728{
729 struct iw_cm_event event;
730
33718363 731 PDBG("%s ep %p status %d\n", __func__, ep, status);
b038ced7
SW		 732 memset(&event, 0, sizeof(event));
733 event.event = IW_CM_EVENT_CONNECT_REPLY;
734 event.status = status;
735 event.local_addr = ep->com.local_addr;
736 event.remote_addr = ep->com.remote_addr;
737
738 if ((status == 0) || (status == -ECONNREFUSED)) {
739 event.private_data_len = ep->plen;
740 event.private_data = ep->mpa_pkt + sizeof(struct mpa_message);
741 }
742 if (ep->com.cm_id) {
33718363 743 PDBG("%s ep %p tid %d status %d\n", __func__, ep,
b038ced7
SW		 744 ep->hwtid, status);
745 ep->com.cm_id->event_handler(ep->com.cm_id, &event);
746 }
747 if (status < 0) {
748 ep->com.cm_id->rem_ref(ep->com.cm_id);
749 ep->com.cm_id = NULL;
750 ep->com.qp = NULL;
751 }
752}
753
754static void connect_request_upcall(struct iwch_ep *ep)
755{
756 struct iw_cm_event event;
757
33718363 758 PDBG("%s ep %p tid %d\n", __func__, ep, ep->hwtid);
b038ced7
SW		 759 memset(&event, 0, sizeof(event));
760 event.event = IW_CM_EVENT_CONNECT_REQUEST;
761 event.local_addr = ep->com.local_addr;
762 event.remote_addr = ep->com.remote_addr;
763 event.private_data_len = ep->plen;
764 event.private_data = ep->mpa_pkt + sizeof(struct mpa_message);
765 event.provider_data = ep;
6e47fe43
SW		 766 if (state_read(&ep->parent_ep->com) != DEAD) {
767 get_ep(&ep->com);
b038ced7
SW		 768 ep->parent_ep->com.cm_id->event_handler(
769 ep->parent_ep->com.cm_id,
770 &event);
6e47fe43 771 }
b038ced7
SW		 772 put_ep(&ep->parent_ep->com);
773 ep->parent_ep = NULL;
774}
775
776static void established_upcall(struct iwch_ep *ep)
777{
778 struct iw_cm_event event;
779
33718363 780 PDBG("%s ep %p\n", __func__, ep);
b038ced7
SW		 781 memset(&event, 0, sizeof(event));
782 event.event = IW_CM_EVENT_ESTABLISHED;
783 if (ep->com.cm_id) {
33718363 784 PDBG("%s ep %p tid %d\n", __func__, ep, ep->hwtid);
b038ced7
SW		 785 ep->com.cm_id->event_handler(ep->com.cm_id, &event);
786 }
787}
788
789static int update_rx_credits(struct iwch_ep *ep, u32 credits)
790{
791 struct cpl_rx_data_ack *req;
792 struct sk_buff *skb;
793
33718363 794 PDBG("%s ep %p credits %u\n", __func__, ep, credits);
b038ced7
SW		 795 skb = get_skb(NULL, sizeof(*req), GFP_KERNEL);
796 if (!skb) {
797 printk(KERN_ERR MOD "update_rx_credits - cannot alloc skb!\n");
798 return 0;
799 }
800
801 req = (struct cpl_rx_data_ack *) skb_put(skb, sizeof(*req));
802 req->wr.wr_hi = htonl(V_WR_OP(FW_WROPCODE_FORWARD));
803 OPCODE_TID(req) = htonl(MK_OPCODE_TID(CPL_RX_DATA_ACK, ep->hwtid));
804 req->credit_dack = htonl(V_RX_CREDITS(credits) | V_RX_FORCE_ACK(1));
805 skb->priority = CPL_PRIORITY_ACK;
04b5d028 806 iwch_cxgb3_ofld_send(ep->com.tdev, skb);
b038ced7
SW		 807 return credits;
808}
809
810static void process_mpa_reply(struct iwch_ep *ep, struct sk_buff *skb)
811{
812 struct mpa_message *mpa;
813 u16 plen;
814 struct iwch_qp_attributes attrs;
815 enum iwch_qp_attr_mask mask;
816 int err;
817
33718363 818 PDBG("%s ep %p\n", __func__, ep);
b038ced7
SW		 819
820 /*
821 * Stop mpa timer. If it expired, then the state has
822 * changed and we bail since ep_timeout already aborted
823 * the connection.
824 */
825 stop_ep_timer(ep);
826 if (state_read(&ep->com) != MPA_REQ_SENT)
827 return;
828
829 /*
830 * If we get more than the supported amount of private data
831 * then we must fail this connection.
832 */
833 if (ep->mpa_pkt_len + skb->len > sizeof(ep->mpa_pkt)) {
834 err = -EINVAL;
835 goto err;
836 }
837
838 /*
839 * copy the new data into our accumulation buffer.
840 */
d626f62b
ACM		 841 skb_copy_from_linear_data(skb, &(ep->mpa_pkt[ep->mpa_pkt_len]),
842 skb->len);
b038ced7
SW		 843 ep->mpa_pkt_len += skb->len;
844
845 /*
846 * if we don't even have the mpa message, then bail.
847 */
848 if (ep->mpa_pkt_len < sizeof(*mpa))
849 return;
850 mpa = (struct mpa_message *) ep->mpa_pkt;
851
852 /* Validate MPA header. */
853 if (mpa->revision != mpa_rev) {
854 err = -EPROTO;
855 goto err;
856 }
857 if (memcmp(mpa->key, MPA_KEY_REP, sizeof(mpa->key))) {
858 err = -EPROTO;
859 goto err;
860 }
861
862 plen = ntohs(mpa->private_data_size);
863
864 /*
865 * Fail if there's too much private data.
866 */
867 if (plen > MPA_MAX_PRIVATE_DATA) {
868 err = -EPROTO;
869 goto err;
870 }
871
872 /*
873 * If plen does not account for pkt size
874 */
875 if (ep->mpa_pkt_len > (sizeof(*mpa) + plen)) {
876 err = -EPROTO;
877 goto err;
878 }
879
880 ep->plen = (u8) plen;
881
882 /*
883 * If we don't have all the pdata yet, then bail.
884 * We'll continue process when more data arrives.
885 */
886 if (ep->mpa_pkt_len < (sizeof(*mpa) + plen))
887 return;
888
889 if (mpa->flags & MPA_REJECT) {
890 err = -ECONNREFUSED;
891 goto err;
892 }
893
894 /*
895 * If we get here we have accumulated the entire mpa
896 * start reply message including private data. And
897 * the MPA header is valid.
898 */
899 state_set(&ep->com, FPDU_MODE);
f8b0dfd1 900 ep->mpa_attr.initiator = 1;
b038ced7
SW		 901 ep->mpa_attr.crc_enabled = (mpa->flags & MPA_CRC) | crc_enabled ? 1 : 0;
902 ep->mpa_attr.recv_marker_enabled = markers_enabled;
903 ep->mpa_attr.xmit_marker_enabled = mpa->flags & MPA_MARKERS ? 1 : 0;
904 ep->mpa_attr.version = mpa_rev;
905 PDBG("%s - crc_enabled=%d, recv_marker_enabled=%d, "
33718363 906 "xmit_marker_enabled=%d, version=%d\n", __func__,
b038ced7
SW		 907 ep->mpa_attr.crc_enabled, ep->mpa_attr.recv_marker_enabled,
908 ep->mpa_attr.xmit_marker_enabled, ep->mpa_attr.version);
909
910 attrs.mpa_attr = ep->mpa_attr;
911 attrs.max_ird = ep->ird;
912 attrs.max_ord = ep->ord;
913 attrs.llp_stream_handle = ep;
914 attrs.next_state = IWCH_QP_STATE_RTS;
915
916 mask = IWCH_QP_ATTR_NEXT_STATE |
917 IWCH_QP_ATTR_LLP_STREAM_HANDLE | IWCH_QP_ATTR_MPA_ATTR |
918 IWCH_QP_ATTR_MAX_IRD | IWCH_QP_ATTR_MAX_ORD;
919
920 /* bind QP and TID with INIT_WR */
921 err = iwch_modify_qp(ep->com.qp->rhp,
922 ep->com.qp, mask, &attrs, 1);
f8b0dfd1
SW		 923 if (err)
924 goto err;
925
926 if (peer2peer && iwch_rqes_posted(ep->com.qp) == 0) {
927 iwch_post_zb_read(ep->com.qp);
928 }
929
930 goto out;
b038ced7
SW		 931err:
932 abort_connection(ep, skb, GFP_KERNEL);
933out:
934 connect_reply_upcall(ep, err);
935 return;
936}
937
938static void process_mpa_request(struct iwch_ep *ep, struct sk_buff *skb)
939{
940 struct mpa_message *mpa;
941 u16 plen;
942
33718363 943 PDBG("%s ep %p\n", __func__, ep);
b038ced7
SW		 944
945 /*
946 * Stop mpa timer. If it expired, then the state has
947 * changed and we bail since ep_timeout already aborted
948 * the connection.
949 */
950 stop_ep_timer(ep);
951 if (state_read(&ep->com) != MPA_REQ_WAIT)
952 return;
953
954 /*
955 * If we get more than the supported amount of private data
956 * then we must fail this connection.
957 */
958 if (ep->mpa_pkt_len + skb->len > sizeof(ep->mpa_pkt)) {
959 abort_connection(ep, skb, GFP_KERNEL);
960 return;
961 }
962
33718363 963 PDBG("%s enter (%s line %u)\n", __func__, __FILE__, __LINE__);
b038ced7
SW		 964
965 /*
966 * Copy the new data into our accumulation buffer.
967 */
d626f62b
ACM		 968 skb_copy_from_linear_data(skb, &(ep->mpa_pkt[ep->mpa_pkt_len]),
969 skb->len);
b038ced7
SW		 970 ep->mpa_pkt_len += skb->len;
971
972 /*
973 * If we don't even have the mpa message, then bail.
974 * We'll continue process when more data arrives.
975 */
976 if (ep->mpa_pkt_len < sizeof(*mpa))
977 return;
33718363 978 PDBG("%s enter (%s line %u)\n", __func__, __FILE__, __LINE__);
b038ced7
SW		 979 mpa = (struct mpa_message *) ep->mpa_pkt;
980
981 /*
982 * Validate MPA Header.
983 */
984 if (mpa->revision != mpa_rev) {
985 abort_connection(ep, skb, GFP_KERNEL);
986 return;
987 }
988
989 if (memcmp(mpa->key, MPA_KEY_REQ, sizeof(mpa->key))) {
990 abort_connection(ep, skb, GFP_KERNEL);
991 return;
992 }
993
994 plen = ntohs(mpa->private_data_size);
995
996 /*
997 * Fail if there's too much private data.
998 */
999 if (plen > MPA_MAX_PRIVATE_DATA) {
1000 abort_connection(ep, skb, GFP_KERNEL);
1001 return;
1002 }
1003
1004 /*
1005 * If plen does not account for pkt size
1006 */
1007 if (ep->mpa_pkt_len > (sizeof(*mpa) + plen)) {
1008 abort_connection(ep, skb, GFP_KERNEL);
1009 return;
1010 }
1011 ep->plen = (u8) plen;
1012
1013 /*
1014 * If we don't have all the pdata yet, then bail.
1015 */
1016 if (ep->mpa_pkt_len < (sizeof(*mpa) + plen))
1017 return;
1018
1019 /*
1020 * If we get here we have accumulated the entire mpa
1021 * start reply message including private data.
1022 */
f8b0dfd1 1023 ep->mpa_attr.initiator = 0;
b038ced7
SW		 1024 ep->mpa_attr.crc_enabled = (mpa->flags & MPA_CRC) | crc_enabled ? 1 : 0;
1025 ep->mpa_attr.recv_marker_enabled = markers_enabled;
1026 ep->mpa_attr.xmit_marker_enabled = mpa->flags & MPA_MARKERS ? 1 : 0;
1027 ep->mpa_attr.version = mpa_rev;
1028 PDBG("%s - crc_enabled=%d, recv_marker_enabled=%d, "
33718363 1029 "xmit_marker_enabled=%d, version=%d\n", __func__,
b038ced7
SW		 1030 ep->mpa_attr.crc_enabled, ep->mpa_attr.recv_marker_enabled,
1031 ep->mpa_attr.xmit_marker_enabled, ep->mpa_attr.version);
1032
1033 state_set(&ep->com, MPA_REQ_RCVD);
1034
1035 /* drive upcall */
1036 connect_request_upcall(ep);
1037 return;
1038}
1039
1040static int rx_data(struct t3cdev *tdev, struct sk_buff *skb, void *ctx)
1041{
1042 struct iwch_ep *ep = ctx;
1043 struct cpl_rx_data *hdr = cplhdr(skb);
1044 unsigned int dlen = ntohs(hdr->len);
1045
33718363 1046 PDBG("%s ep %p dlen %u\n", __func__, ep, dlen);
b038ced7
SW		 1047
1048 skb_pull(skb, sizeof(*hdr));
1049 skb_trim(skb, dlen);
1050
de3d3530
SW		 1051 ep->rcv_seq += dlen;
1052 BUG_ON(ep->rcv_seq != (ntohl(hdr->seq) + dlen));
1053
b038ced7
SW		 1054 switch (state_read(&ep->com)) {
1055 case MPA_REQ_SENT:
1056 process_mpa_reply(ep, skb);
1057 break;
1058 case MPA_REQ_WAIT:
1059 process_mpa_request(ep, skb);
1060 break;
1061 case MPA_REP_SENT:
1062 break;
1063 default:
1064 printk(KERN_ERR MOD "%s Unexpected streaming data."
1065 " ep %p state %d tid %d\n",
33718363 1066 __func__, ep, state_read(&ep->com), ep->hwtid);
b038ced7
SW		 1067
1068 /*
1069 * The ep will timeout and inform the ULP of the failure.
1070 * See ep_timeout().
1071 */
1072 break;
1073 }
1074
1075 /* update RX credits */
1076 update_rx_credits(ep, dlen);
1077
1078 return CPL_RET_BUF_DONE;
1079}
1080
1081/*
1082 * Upcall from the adapter indicating data has been transmitted.
1083 * For us its just the single MPA request or reply. We can now free
1084 * the skb holding the mpa message.
1085 */
1086static int tx_ack(struct t3cdev *tdev, struct sk_buff *skb, void *ctx)
1087{
1088 struct iwch_ep *ep = ctx;
1089 struct cpl_wr_ack *hdr = cplhdr(skb);
1090 unsigned int credits = ntohs(hdr->credits);
b038ced7 1091
33718363 1092 PDBG("%s ep %p credits %u\n", __func__, ep, credits);
b038ced7 1093
f8b0dfd1
SW		 1094 if (credits == 0) {
1095 PDBG(KERN_ERR "%s 0 credit ack ep %p state %u\n",
1096 __func__, ep, state_read(&ep->com));
b038ced7 1097 return CPL_RET_BUF_DONE;
f8b0dfd1
SW		 1098 }
1099
b038ced7 1100 BUG_ON(credits != 1);
b038ced7 1101 dst_confirm(ep->dst);
f8b0dfd1
SW		 1102 if (!ep->mpa_skb) {
1103 PDBG("%s rdma_init wr_ack ep %p state %u\n",
1104 __func__, ep, state_read(&ep->com));
1105 if (ep->mpa_attr.initiator) {
1106 PDBG("%s initiator ep %p state %u\n",
1107 __func__, ep, state_read(&ep->com));
1108 if (peer2peer)
1109 iwch_post_zb_read(ep->com.qp);
1110 } else {
1111 PDBG("%s responder ep %p state %u\n",
1112 __func__, ep, state_read(&ep->com));
1113 ep->com.rpl_done = 1;
1114 wake_up(&ep->com.waitq);
1115 }
1116 } else {
1117 PDBG("%s lsm ack ep %p state %u freeing skb\n",
1118 __func__, ep, state_read(&ep->com));
1119 kfree_skb(ep->mpa_skb);
1120 ep->mpa_skb = NULL;
b038ced7
SW		 1121 }
1122 return CPL_RET_BUF_DONE;
1123}
1124
1125static int abort_rpl(struct t3cdev *tdev, struct sk_buff *skb, void *ctx)
1126{
1127 struct iwch_ep *ep = ctx;
989a1780
SW		 1128 unsigned long flags;
1129 int release = 0;
b038ced7 1130
33718363 1131 PDBG("%s ep %p\n", __func__, ep);
989a1780 1132 BUG_ON(!ep);
b038ced7 1133
aff9e39d
SW		 1134 /*
1135 * We get 2 abort replies from the HW. The first one must
1136 * be ignored except for scribbling that we need one more.
1137 */
6e47fe43 1138 if (!test_and_set_bit(ABORT_REQ_IN_PROGRESS, &ep->com.flags)) {
aff9e39d
SW		 1139 return CPL_RET_BUF_DONE;
1140 }
1141
989a1780
SW		 1142 spin_lock_irqsave(&ep->com.lock, flags);
1143 switch (ep->com.state) {
1144 case ABORTING:
1145 close_complete_upcall(ep);
1146 __state_set(&ep->com, DEAD);
1147 release = 1;
1148 break;
1149 default:
1150 printk(KERN_ERR "%s ep %p state %d\n",
1151 __func__, ep, ep->com.state);
1152 break;
1153 }
1154 spin_unlock_irqrestore(&ep->com.lock, flags);
1155
1156 if (release)
1157 release_ep_resources(ep);
b038ced7
SW		 1158 return CPL_RET_BUF_DONE;
1159}
1160
96d0e493
SW		 1161/*
1162 * Return whether a failed active open has allocated a TID
1163 */
1164static inline int act_open_has_tid(int status)
1165{
1166 return status != CPL_ERR_TCAM_FULL && status != CPL_ERR_CONN_EXIST &&
1167 status != CPL_ERR_ARP_MISS;
1168}
1169
b038ced7
SW		 1170static int act_open_rpl(struct t3cdev *tdev, struct sk_buff *skb, void *ctx)
1171{
1172 struct iwch_ep *ep = ctx;
1173 struct cpl_act_open_rpl *rpl = cplhdr(skb);
1174
33718363 1175 PDBG("%s ep %p status %u errno %d\n", __func__, ep, rpl->status,
b038ced7
SW		 1176 status2errno(rpl->status));
1177 connect_reply_upcall(ep, status2errno(rpl->status));
1178 state_set(&ep->com, DEAD);
8176d297 1179 if (ep->com.tdev->type != T3A && act_open_has_tid(rpl->status))
b038ced7
SW		 1180 release_tid(ep->com.tdev, GET_TID(rpl), NULL);
1181 cxgb3_free_atid(ep->com.tdev, ep->atid);
1182 dst_release(ep->dst);
1183 l2t_release(L2DATA(ep->com.tdev), ep->l2t);
1184 put_ep(&ep->com);
1185 return CPL_RET_BUF_DONE;
1186}
1187
1188static int listen_start(struct iwch_listen_ep *ep)
1189{
1190 struct sk_buff *skb;
1191 struct cpl_pass_open_req *req;
1192
33718363 1193 PDBG("%s ep %p\n", __func__, ep);
b038ced7
SW		 1194 skb = get_skb(NULL, sizeof(*req), GFP_KERNEL);
1195 if (!skb) {
1196 printk(KERN_ERR MOD "t3c_listen_start failed to alloc skb!\n");
1197 return -ENOMEM;
1198 }
1199
1200 req = (struct cpl_pass_open_req *) skb_put(skb, sizeof(*req));
1201 req->wr.wr_hi = htonl(V_WR_OP(FW_WROPCODE_FORWARD));
1202 OPCODE_TID(req) = htonl(MK_OPCODE_TID(CPL_PASS_OPEN_REQ, ep->stid));
1203 req->local_port = ep->com.local_addr.sin_port;
1204 req->local_ip = ep->com.local_addr.sin_addr.s_addr;
1205 req->peer_port = 0;
1206 req->peer_ip = 0;
1207 req->peer_netmask = 0;
1208 req->opt0h = htonl(F_DELACK | F_TCAM_BYPASS);
1209 req->opt0l = htonl(V_RCV_BUFSIZ(rcv_win>>10));
1210 req->opt1 = htonl(V_CONN_POLICY(CPL_CONN_POLICY_ASK));
1211
1212 skb->priority = 1;
04b5d028 1213 return iwch_cxgb3_ofld_send(ep->com.tdev, skb);
b038ced7
SW		 1214}
1215
1216static int pass_open_rpl(struct t3cdev *tdev, struct sk_buff *skb, void *ctx)
1217{
1218 struct iwch_listen_ep *ep = ctx;
1219 struct cpl_pass_open_rpl *rpl = cplhdr(skb);
1220
33718363 1221 PDBG("%s ep %p status %d error %d\n", __func__, ep,
b038ced7
SW		 1222 rpl->status, status2errno(rpl->status));
1223 ep->com.rpl_err = status2errno(rpl->status);
1224 ep->com.rpl_done = 1;
1225 wake_up(&ep->com.waitq);
1226
1227 return CPL_RET_BUF_DONE;
1228}
1229
1230static int listen_stop(struct iwch_listen_ep *ep)
1231{
1232 struct sk_buff *skb;
1233 struct cpl_close_listserv_req *req;
1234
33718363 1235 PDBG("%s ep %p\n", __func__, ep);
b038ced7
SW		 1236 skb = get_skb(NULL, sizeof(*req), GFP_KERNEL);
1237 if (!skb) {
33718363 1238 printk(KERN_ERR MOD "%s - failed to alloc skb\n", __func__);
b038ced7
SW		 1239 return -ENOMEM;
1240 }
1241 req = (struct cpl_close_listserv_req *) skb_put(skb, sizeof(*req));
1242 req->wr.wr_hi = htonl(V_WR_OP(FW_WROPCODE_FORWARD));
60be4b59 1243 req->cpu_idx = 0;
b038ced7
SW		 1244 OPCODE_TID(req) = htonl(MK_OPCODE_TID(CPL_CLOSE_LISTSRV_REQ, ep->stid));
1245 skb->priority = 1;
04b5d028 1246 return iwch_cxgb3_ofld_send(ep->com.tdev, skb);
b038ced7
SW		 1247}
1248
1249static int close_listsrv_rpl(struct t3cdev *tdev, struct sk_buff *skb,
1250 void *ctx)
1251{
1252 struct iwch_listen_ep *ep = ctx;
1253 struct cpl_close_listserv_rpl *rpl = cplhdr(skb);
1254
33718363 1255 PDBG("%s ep %p\n", __func__, ep);
b038ced7
SW		 1256 ep->com.rpl_err = status2errno(rpl->status);
1257 ep->com.rpl_done = 1;
1258 wake_up(&ep->com.waitq);
1259 return CPL_RET_BUF_DONE;
1260}
1261
1262static void accept_cr(struct iwch_ep *ep, __be32 peer_ip, struct sk_buff *skb)
1263{
1264 struct cpl_pass_accept_rpl *rpl;
1265 unsigned int mtu_idx;
1266 u32 opt0h, opt0l, opt2;
1267 int wscale;
1268
33718363 1269 PDBG("%s ep %p\n", __func__, ep);
b038ced7
SW		 1270 BUG_ON(skb_cloned(skb));
1271 skb_trim(skb, sizeof(*rpl));
1272 skb_get(skb);
1273 mtu_idx = find_best_mtu(T3C_DATA(ep->com.tdev), dst_mtu(ep->dst));
1274 wscale = compute_wscale(rcv_win);
1275 opt0h = V_NAGLE(0) |
1276 V_NO_CONG(nocong) |
1277 V_KEEP_ALIVE(1) |
1278 F_TCAM_BYPASS |
1279 V_WND_SCALE(wscale) |
1280 V_MSS_IDX(mtu_idx) |
1281 V_L2T_IDX(ep->l2t->idx) | V_TX_CHANNEL(ep->l2t->smt_idx);
1282 opt0l = V_TOS((ep->tos >> 2) & M_TOS) | V_RCV_BUFSIZ(rcv_win>>10);
1283 opt2 = V_FLAVORS_VALID(1) | V_CONG_CONTROL_FLAVOR(cong_flavor);
1284
1285 rpl = cplhdr(skb);
1286 rpl->wr.wr_hi = htonl(V_WR_OP(FW_WROPCODE_FORWARD));
1287 OPCODE_TID(rpl) = htonl(MK_OPCODE_TID(CPL_PASS_ACCEPT_RPL, ep->hwtid));
1288 rpl->peer_ip = peer_ip;
1289 rpl->opt0h = htonl(opt0h);
1290 rpl->opt0l_status = htonl(opt0l | CPL_PASS_OPEN_ACCEPT);
1291 rpl->opt2 = htonl(opt2);
1292 rpl->rsvd = rpl->opt2; /* workaround for HW bug */
1293 skb->priority = CPL_PRIORITY_SETUP;
04b5d028 1294 iwch_l2t_send(ep->com.tdev, skb, ep->l2t);
b038ced7
SW		 1295
1296 return;
1297}
1298
1299static void reject_cr(struct t3cdev *tdev, u32 hwtid, __be32 peer_ip,
1300 struct sk_buff *skb)
1301{
33718363 1302 PDBG("%s t3cdev %p tid %u peer_ip %x\n", __func__, tdev, hwtid,
b038ced7
SW		 1303 peer_ip);
1304 BUG_ON(skb_cloned(skb));
1305 skb_trim(skb, sizeof(struct cpl_tid_release));
1306 skb_get(skb);
1307
8176d297 1308 if (tdev->type != T3A)
b038ced7
SW		 1309 release_tid(tdev, hwtid, skb);
1310 else {
1311 struct cpl_pass_accept_rpl *rpl;
1312
1313 rpl = cplhdr(skb);
1314 skb->priority = CPL_PRIORITY_SETUP;
1315 rpl->wr.wr_hi = htonl(V_WR_OP(FW_WROPCODE_FORWARD));
1316 OPCODE_TID(rpl) = htonl(MK_OPCODE_TID(CPL_PASS_ACCEPT_RPL,
1317 hwtid));
1318 rpl->peer_ip = peer_ip;
1319 rpl->opt0h = htonl(F_TCAM_BYPASS);
1320 rpl->opt0l_status = htonl(CPL_PASS_OPEN_REJECT);
1321 rpl->opt2 = 0;
1322 rpl->rsvd = rpl->opt2;
04b5d028 1323 iwch_cxgb3_ofld_send(tdev, skb);
b038ced7
SW		 1324 }
1325}
1326
1327static int pass_accept_req(struct t3cdev *tdev, struct sk_buff *skb, void *ctx)
1328{
1329 struct iwch_ep *child_ep, *parent_ep = ctx;
1330 struct cpl_pass_accept_req *req = cplhdr(skb);
1331 unsigned int hwtid = GET_TID(req);
1332 struct dst_entry *dst;
1333 struct l2t_entry *l2t;
1334 struct rtable *rt;
1335 struct iff_mac tim;
1336
33718363 1337 PDBG("%s parent ep %p tid %u\n", __func__, parent_ep, hwtid);
b038ced7
SW		 1338
1339 if (state_read(&parent_ep->com) != LISTEN) {
1340 printk(KERN_ERR "%s - listening ep not in LISTEN\n",
33718363 1341 __func__);
b038ced7
SW		 1342 goto reject;
1343 }
1344
1345 /*
1346 * Find the netdev for this connection request.
1347 */
1348 tim.mac_addr = req->dst_mac;
1349 tim.vlan_tag = ntohs(req->vlan_tag);
1350 if (tdev->ctl(tdev, GET_IFF_FROM_MAC, &tim) < 0 || !tim.dev) {
eacc4d6a
HS		 1351 printk(KERN_ERR "%s bad dst mac %pM\n",
1352 __func__, req->dst_mac);
b038ced7
SW		 1353 goto reject;
1354 }
1355
1356 /* Find output route */
1357 rt = find_route(tdev,
1358 req->local_ip,
1359 req->peer_ip,
1360 req->local_port,
1361 req->peer_port, G_PASS_OPEN_TOS(ntohl(req->tos_tid)));
1362 if (!rt) {
1363 printk(KERN_ERR MOD "%s - failed to find dst entry!\n",
33718363 1364 __func__);
b038ced7
SW		 1365 goto reject;
1366 }
1367 dst = &rt->u.dst;
1368 l2t = t3_l2t_get(tdev, dst->neighbour, dst->neighbour->dev);
1369 if (!l2t) {
1370 printk(KERN_ERR MOD "%s - failed to allocate l2t entry!\n",
33718363 1371 __func__);
b038ced7
SW		 1372 dst_release(dst);
1373 goto reject;
1374 }
1375 child_ep = alloc_ep(sizeof(*child_ep), GFP_KERNEL);
1376 if (!child_ep) {
1377 printk(KERN_ERR MOD "%s - failed to allocate ep entry!\n",
33718363 1378 __func__);
b038ced7
SW		 1379 l2t_release(L2DATA(tdev), l2t);
1380 dst_release(dst);
1381 goto reject;
1382 }
1383 state_set(&child_ep->com, CONNECTING);
1384 child_ep->com.tdev = tdev;
1385 child_ep->com.cm_id = NULL;
1386 child_ep->com.local_addr.sin_family = PF_INET;
1387 child_ep->com.local_addr.sin_port = req->local_port;
1388 child_ep->com.local_addr.sin_addr.s_addr = req->local_ip;
1389 child_ep->com.remote_addr.sin_family = PF_INET;
1390 child_ep->com.remote_addr.sin_port = req->peer_port;
1391 child_ep->com.remote_addr.sin_addr.s_addr = req->peer_ip;
1392 get_ep(&parent_ep->com);
1393 child_ep->parent_ep = parent_ep;
1394 child_ep->tos = G_PASS_OPEN_TOS(ntohl(req->tos_tid));
1395 child_ep->l2t = l2t;
1396 child_ep->dst = dst;
1397 child_ep->hwtid = hwtid;
1398 init_timer(&child_ep->timer);
1399 cxgb3_insert_tid(tdev, &t3c_client, child_ep, hwtid);
1400 accept_cr(child_ep, req->peer_ip, skb);
1401 goto out;
1402reject:
1403 reject_cr(tdev, hwtid, req->peer_ip, skb);
1404out:
1405 return CPL_RET_BUF_DONE;
1406}
1407
1408static int pass_establish(struct t3cdev *tdev, struct sk_buff *skb, void *ctx)
1409{
1410 struct iwch_ep *ep = ctx;
1411 struct cpl_pass_establish *req = cplhdr(skb);
1412
33718363 1413 PDBG("%s ep %p\n", __func__, ep);
b038ced7 1414 ep->snd_seq = ntohl(req->snd_isn);
de3d3530 1415 ep->rcv_seq = ntohl(req->rcv_isn);
b038ced7
SW		 1416
1417 set_emss(ep, ntohs(req->tcp_opt));
1418
1419 dst_confirm(ep->dst);
1420 state_set(&ep->com, MPA_REQ_WAIT);
1421 start_ep_timer(ep);
1422
1423 return CPL_RET_BUF_DONE;
1424}
1425
1426static int peer_close(struct t3cdev *tdev, struct sk_buff *skb, void *ctx)
1427{
1428 struct iwch_ep *ep = ctx;
1429 struct iwch_qp_attributes attrs;
1430 unsigned long flags;
1431 int disconnect = 1;
1432 int release = 0;
1433
33718363 1434 PDBG("%s ep %p\n", __func__, ep);
b038ced7
SW		 1435 dst_confirm(ep->dst);
1436
1437 spin_lock_irqsave(&ep->com.lock, flags);
1438 switch (ep->com.state) {
1439 case MPA_REQ_WAIT:
1440 __state_set(&ep->com, CLOSING);
1441 break;
1442 case MPA_REQ_SENT:
1443 __state_set(&ep->com, CLOSING);
1444 connect_reply_upcall(ep, -ECONNRESET);
1445 break;
1446 case MPA_REQ_RCVD:
1447
1448 /*
1449 * We're gonna mark this puppy DEAD, but keep
1450 * the reference on it until the ULP accepts or
a52bf98d
SW		 1451 * rejects the CR. Also wake up anyone waiting
1452 * in rdma connection migration (see iwch_accept_cr()).
b038ced7
SW		 1453 */
1454 __state_set(&ep->com, CLOSING);
a52bf98d
SW		 1455 ep->com.rpl_done = 1;
1456 ep->com.rpl_err = -ECONNRESET;
1457 PDBG("waking up ep %p\n", ep);
1458 wake_up(&ep->com.waitq);
b038ced7
SW		 1459 break;
1460 case MPA_REP_SENT:
1461 __state_set(&ep->com, CLOSING);
1462 ep->com.rpl_done = 1;
1463 ep->com.rpl_err = -ECONNRESET;
1464 PDBG("waking up ep %p\n", ep);
1465 wake_up(&ep->com.waitq);
1466 break;
1467 case FPDU_MODE:
42e31753 1468 start_ep_timer(ep);
b038ced7
SW		 1469 __state_set(&ep->com, CLOSING);
1470 attrs.next_state = IWCH_QP_STATE_CLOSING;
1471 iwch_modify_qp(ep->com.qp->rhp, ep->com.qp,
1472 IWCH_QP_ATTR_NEXT_STATE, &attrs, 1);
1473 peer_close_upcall(ep);
1474 break;
1475 case ABORTING:
1476 disconnect = 0;
1477 break;
1478 case CLOSING:
b038ced7
SW		 1479 __state_set(&ep->com, MORIBUND);
1480 disconnect = 0;
1481 break;
1482 case MORIBUND:
1483 stop_ep_timer(ep);
1484 if (ep->com.cm_id && ep->com.qp) {
1485 attrs.next_state = IWCH_QP_STATE_IDLE;
1486 iwch_modify_qp(ep->com.qp->rhp, ep->com.qp,
1487 IWCH_QP_ATTR_NEXT_STATE, &attrs, 1);
1488 }
1489 close_complete_upcall(ep);
1490 __state_set(&ep->com, DEAD);
1491 release = 1;
1492 disconnect = 0;
1493 break;
1494 case DEAD:
1495 disconnect = 0;
1496 break;
1497 default:
1498 BUG_ON(1);
1499 }
1500 spin_unlock_irqrestore(&ep->com.lock, flags);
1501 if (disconnect)
1502 iwch_ep_disconnect(ep, 0, GFP_KERNEL);
1503 if (release)
1504 release_ep_resources(ep);
1505 return CPL_RET_BUF_DONE;
1506}
1507
1508/*
1509 * Returns whether an ABORT_REQ_RSS message is a negative advice.
1510 */
2b540355 1511static int is_neg_adv_abort(unsigned int status)
b038ced7
SW		 1512{
1513 return status == CPL_ERR_RTX_NEG_ADVICE ||
1514 status == CPL_ERR_PERSIST_NEG_ADVICE;
1515}
1516
1517static int peer_abort(struct t3cdev *tdev, struct sk_buff *skb, void *ctx)
1518{
1519 struct cpl_abort_req_rss *req = cplhdr(skb);
1520 struct iwch_ep *ep = ctx;
1521 struct cpl_abort_rpl *rpl;
1522 struct sk_buff *rpl_skb;
1523 struct iwch_qp_attributes attrs;
1524 int ret;
989a1780
SW		 1525 int release = 0;
1526 unsigned long flags;
b038ced7 1527
1580367e 1528 if (is_neg_adv_abort(req->status)) {
33718363 1529 PDBG("%s neg_adv_abort ep %p tid %d\n", __func__, ep,
1580367e
SW		 1530 ep->hwtid);
1531 t3_l2t_send_event(ep->com.tdev, ep->l2t);
1532 return CPL_RET_BUF_DONE;
1533 }
1534
aff9e39d
SW		 1535 /*
1536 * We get 2 peer aborts from the HW. The first one must
1537 * be ignored except for scribbling that we need one more.
1538 */
6e47fe43 1539 if (!test_and_set_bit(PEER_ABORT_IN_PROGRESS, &ep->com.flags)) {
aff9e39d
SW		 1540 return CPL_RET_BUF_DONE;
1541 }
1542
989a1780
SW		 1543 spin_lock_irqsave(&ep->com.lock, flags);
1544 PDBG("%s ep %p state %u\n", __func__, ep, ep->com.state);
1545 switch (ep->com.state) {
b038ced7
SW		 1546 case CONNECTING:
1547 break;
1548 case MPA_REQ_WAIT:
adf376b3 1549 stop_ep_timer(ep);
b038ced7
SW		 1550 break;
1551 case MPA_REQ_SENT:
adf376b3 1552 stop_ep_timer(ep);
b038ced7
SW		 1553 connect_reply_upcall(ep, -ECONNRESET);
1554 break;
1555 case MPA_REP_SENT:
1556 ep->com.rpl_done = 1;
1557 ep->com.rpl_err = -ECONNRESET;
1558 PDBG("waking up ep %p\n", ep);
1559 wake_up(&ep->com.waitq);
1560 break;
1561 case MPA_REQ_RCVD:
1562
1563 /*
1564 * We're gonna mark this puppy DEAD, but keep
1565 * the reference on it until the ULP accepts or
a52bf98d
SW		 1566 * rejects the CR. Also wake up anyone waiting
1567 * in rdma connection migration (see iwch_accept_cr()).
b038ced7 1568 */
a52bf98d
SW		 1569 ep->com.rpl_done = 1;
1570 ep->com.rpl_err = -ECONNRESET;
1571 PDBG("waking up ep %p\n", ep);
1572 wake_up(&ep->com.waitq);
b038ced7
SW		 1573 break;
1574 case MORIBUND:
42e31753 1575 case CLOSING:
b038ced7 1576 stop_ep_timer(ep);
42e31753 1577 /*FALLTHROUGH*/
b038ced7 1578 case FPDU_MODE:
b038ced7
SW		 1579 if (ep->com.cm_id && ep->com.qp) {
1580 attrs.next_state = IWCH_QP_STATE_ERROR;
1581 ret = iwch_modify_qp(ep->com.qp->rhp,
1582 ep->com.qp, IWCH_QP_ATTR_NEXT_STATE,
1583 &attrs, 1);
1584 if (ret)
1585 printk(KERN_ERR MOD
1586 "%s - qp <- error failed!\n",
33718363 1587 __func__);
b038ced7
SW		 1588 }
1589 peer_abort_upcall(ep);
1590 break;
1591 case ABORTING:
1592 break;
1593 case DEAD:
33718363 1594 PDBG("%s PEER_ABORT IN DEAD STATE!!!!\n", __func__);
989a1780 1595 spin_unlock_irqrestore(&ep->com.lock, flags);
b038ced7
SW		 1596 return CPL_RET_BUF_DONE;
1597 default:
1598 BUG_ON(1);
1599 break;
1600 }
1601 dst_confirm(ep->dst);
989a1780
SW		 1602 if (ep->com.state != ABORTING) {
1603 __state_set(&ep->com, DEAD);
1604 release = 1;
1605 }
1606 spin_unlock_irqrestore(&ep->com.lock, flags);
b038ced7
SW		 1607
1608 rpl_skb = get_skb(skb, sizeof(*rpl), GFP_KERNEL);
1609 if (!rpl_skb) {
1610 printk(KERN_ERR MOD "%s - cannot allocate skb!\n",
33718363 1611 __func__);
989a1780
SW		 1612 release = 1;
1613 goto out;
b038ced7
SW		 1614 }
1615 rpl_skb->priority = CPL_PRIORITY_DATA;
1616 rpl = (struct cpl_abort_rpl *) skb_put(rpl_skb, sizeof(*rpl));
1617 rpl->wr.wr_hi = htonl(V_WR_OP(FW_WROPCODE_OFLD_HOST_ABORT_CON_RPL));
1618 rpl->wr.wr_lo = htonl(V_WR_TID(ep->hwtid));
1619 OPCODE_TID(rpl) = htonl(MK_OPCODE_TID(CPL_ABORT_RPL, ep->hwtid));
1620 rpl->cmd = CPL_ABORT_NO_RST;
04b5d028 1621 iwch_cxgb3_ofld_send(ep->com.tdev, rpl_skb);
989a1780
SW		 1622out:
1623 if (release)
b038ced7 1624 release_ep_resources(ep);
b038ced7
SW		 1625 return CPL_RET_BUF_DONE;
1626}
1627
1628static int close_con_rpl(struct t3cdev *tdev, struct sk_buff *skb, void *ctx)
1629{
1630 struct iwch_ep *ep = ctx;
1631 struct iwch_qp_attributes attrs;
1632 unsigned long flags;
1633 int release = 0;
1634
33718363 1635 PDBG("%s ep %p\n", __func__, ep);
b038ced7
SW		 1636 BUG_ON(!ep);
1637
1638 /* The cm_id may be null if we failed to connect */
1639 spin_lock_irqsave(&ep->com.lock, flags);
1640 switch (ep->com.state) {
1641 case CLOSING:
b038ced7
SW		 1642 __state_set(&ep->com, MORIBUND);
1643 break;
1644 case MORIBUND:
1645 stop_ep_timer(ep);
1646 if ((ep->com.cm_id) && (ep->com.qp)) {
1647 attrs.next_state = IWCH_QP_STATE_IDLE;
1648 iwch_modify_qp(ep->com.qp->rhp,
1649 ep->com.qp,
1650 IWCH_QP_ATTR_NEXT_STATE,
1651 &attrs, 1);
1652 }
1653 close_complete_upcall(ep);
1654 __state_set(&ep->com, DEAD);
1655 release = 1;
1656 break;
42e31753 1657 case ABORTING:
b038ced7 1658 case DEAD:
c4d49776 1659 break;
b038ced7
SW		 1660 default:
1661 BUG_ON(1);
1662 break;
1663 }
1664 spin_unlock_irqrestore(&ep->com.lock, flags);
1665 if (release)
1666 release_ep_resources(ep);
1667 return CPL_RET_BUF_DONE;
1668}
1669
1670/*
1671 * T3A does 3 things when a TERM is received:
1672 * 1) send up a CPL_RDMA_TERMINATE message with the TERM packet
1673 * 2) generate an async event on the QP with the TERMINATE opcode
1674 * 3) post a TERMINATE opcde cqe into the associated CQ.
1675 *
1676 * For (1), we save the message in the qp for later consumer consumption.
1677 * For (2), we move the QP into TERMINATE, post a QP event and disconnect.
1678 * For (3), we toss the CQE in cxio_poll_cq().
1679 *
1680 * terminate() handles case (1)...
1681 */
1682static int terminate(struct t3cdev *tdev, struct sk_buff *skb, void *ctx)
1683{
1684 struct iwch_ep *ep = ctx;
1685
42fb61f0
SW		 1686 if (state_read(&ep->com) != FPDU_MODE)
1687 return CPL_RET_BUF_DONE;
1688
33718363 1689 PDBG("%s ep %p\n", __func__, ep);
b038ced7 1690 skb_pull(skb, sizeof(struct cpl_rdma_terminate));
33718363 1691 PDBG("%s saving %d bytes of term msg\n", __func__, skb->len);
d626f62b
ACM		 1692 skb_copy_from_linear_data(skb, ep->com.qp->attr.terminate_buffer,
1693 skb->len);
b038ced7
SW		 1694 ep->com.qp->attr.terminate_msg_len = skb->len;
1695 ep->com.qp->attr.is_terminate_local = 0;
1696 return CPL_RET_BUF_DONE;
1697}
1698
1699static int ec_status(struct t3cdev *tdev, struct sk_buff *skb, void *ctx)
1700{
1701 struct cpl_rdma_ec_status *rep = cplhdr(skb);
1702 struct iwch_ep *ep = ctx;
1703
33718363 1704 PDBG("%s ep %p tid %u status %d\n", __func__, ep, ep->hwtid,
b038ced7
SW		 1705 rep->status);
1706 if (rep->status) {
1707 struct iwch_qp_attributes attrs;
1708
1709 printk(KERN_ERR MOD "%s BAD CLOSE - Aborting tid %u\n",
33718363 1710 __func__, ep->hwtid);
2f236735 1711 stop_ep_timer(ep);
b038ced7
SW		 1712 attrs.next_state = IWCH_QP_STATE_ERROR;
1713 iwch_modify_qp(ep->com.qp->rhp,
1714 ep->com.qp, IWCH_QP_ATTR_NEXT_STATE,
1715 &attrs, 1);
1716 abort_connection(ep, NULL, GFP_KERNEL);
1717 }
1718 return CPL_RET_BUF_DONE;
1719}
1720
1721static void ep_timeout(unsigned long arg)
1722{
1723 struct iwch_ep *ep = (struct iwch_ep *)arg;
1724 struct iwch_qp_attributes attrs;
1725 unsigned long flags;
989a1780 1726 int abort = 1;
b038ced7
SW		 1727
1728 spin_lock_irqsave(&ep->com.lock, flags);
33718363 1729 PDBG("%s ep %p tid %u state %d\n", __func__, ep, ep->hwtid,
b038ced7
SW		 1730 ep->com.state);
1731 switch (ep->com.state) {
1732 case MPA_REQ_SENT:
989a1780 1733 __state_set(&ep->com, ABORTING);
b038ced7
SW		 1734 connect_reply_upcall(ep, -ETIMEDOUT);
1735 break;
1736 case MPA_REQ_WAIT:
989a1780 1737 __state_set(&ep->com, ABORTING);
b038ced7 1738 break;
42e31753 1739 case CLOSING:
b038ced7
SW		 1740 case MORIBUND:
1741 if (ep->com.cm_id && ep->com.qp) {
1742 attrs.next_state = IWCH_QP_STATE_ERROR;
1743 iwch_modify_qp(ep->com.qp->rhp,
1744 ep->com.qp, IWCH_QP_ATTR_NEXT_STATE,
1745 &attrs, 1);
1746 }
989a1780 1747 __state_set(&ep->com, ABORTING);
b038ced7
SW		 1748 break;
1749 default:
989a1780
SW		 1750 printk(KERN_ERR "%s unexpected state ep %p state %u\n",
1751 __func__, ep, ep->com.state);
1752 WARN_ON(1);
1753 abort = 0;
b038ced7 1754 }
b038ced7 1755 spin_unlock_irqrestore(&ep->com.lock, flags);
989a1780
SW		 1756 if (abort)
1757 abort_connection(ep, NULL, GFP_ATOMIC);
b038ced7
SW		 1758 put_ep(&ep->com);
1759}
1760
1761int iwch_reject_cr(struct iw_cm_id *cm_id, const void *pdata, u8 pdata_len)
1762{
1763 int err;
1764 struct iwch_ep *ep = to_ep(cm_id);
33718363 1765 PDBG("%s ep %p tid %u\n", __func__, ep, ep->hwtid);
b038ced7
SW		 1766
1767 if (state_read(&ep->com) == DEAD) {
1768 put_ep(&ep->com);
1769 return -ECONNRESET;
1770 }
1771 BUG_ON(state_read(&ep->com) != MPA_REQ_RCVD);
b038ced7
SW		 1772 if (mpa_rev == 0)
1773 abort_connection(ep, NULL, GFP_KERNEL);
1774 else {
1775 err = send_mpa_reject(ep, pdata, pdata_len);
7d526e6b 1776 err = iwch_ep_disconnect(ep, 0, GFP_KERNEL);
b038ced7 1777 }
6e47fe43 1778 put_ep(&ep->com);
b038ced7
SW		 1779 return 0;
1780}
1781
1782int iwch_accept_cr(struct iw_cm_id *cm_id, struct iw_cm_conn_param *conn_param)
1783{
1784 int err;
1785 struct iwch_qp_attributes attrs;
1786 enum iwch_qp_attr_mask mask;
1787 struct iwch_ep *ep = to_ep(cm_id);
1788 struct iwch_dev *h = to_iwch_dev(cm_id->device);
1789 struct iwch_qp *qp = get_qhp(h, conn_param->qpn);
1790
33718363 1791 PDBG("%s ep %p tid %u\n", __func__, ep, ep->hwtid);
6e47fe43
SW		 1792 if (state_read(&ep->com) == DEAD) {
1793 err = -ECONNRESET;
1794 goto err;
1795 }
b038ced7
SW		 1796
1797 BUG_ON(state_read(&ep->com) != MPA_REQ_RCVD);
1798 BUG_ON(!qp);
1799
1800 if ((conn_param->ord > qp->rhp->attr.max_rdma_read_qp_depth) ||
1801 (conn_param->ird > qp->rhp->attr.max_rdma_reads_per_qp)) {
1802 abort_connection(ep, NULL, GFP_KERNEL);
6e47fe43
SW		 1803 err = -EINVAL;
1804 goto err;
b038ced7
SW		 1805 }
1806
1807 cm_id->add_ref(cm_id);
1808 ep->com.cm_id = cm_id;
1809 ep->com.qp = qp;
1810
b038ced7
SW		 1811 ep->ird = conn_param->ird;
1812 ep->ord = conn_param->ord;
96ac7e88
SW		 1813
1814 if (peer2peer && ep->ird == 0)
1815 ep->ird = 1;
1816
33718363 1817 PDBG("%s %d ird %d ord %d\n", __func__, __LINE__, ep->ird, ep->ord);
de3d3530 1818
b038ced7
SW		 1819 /* bind QP to EP and move to RTS */
1820 attrs.mpa_attr = ep->mpa_attr;
1f71f503 1821 attrs.max_ird = ep->ird;
b038ced7
SW		 1822 attrs.max_ord = ep->ord;
1823 attrs.llp_stream_handle = ep;
1824 attrs.next_state = IWCH_QP_STATE_RTS;
1825
1826 /* bind QP and TID with INIT_WR */
1827 mask = IWCH_QP_ATTR_NEXT_STATE |
1828 IWCH_QP_ATTR_LLP_STREAM_HANDLE |
1829 IWCH_QP_ATTR_MPA_ATTR |
1830 IWCH_QP_ATTR_MAX_IRD |
1831 IWCH_QP_ATTR_MAX_ORD;
1832
1833 err = iwch_modify_qp(ep->com.qp->rhp,
1834 ep->com.qp, mask, &attrs, 1);
de3d3530 1835 if (err)
6e47fe43 1836 goto err1;
b038ced7 1837
f8b0dfd1
SW		 1838 /* if needed, wait for wr_ack */
1839 if (iwch_rqes_posted(qp)) {
1840 wait_event(ep->com.waitq, ep->com.rpl_done);
1841 err = ep->com.rpl_err;
1842 if (err)
6e47fe43 1843 goto err1;
f8b0dfd1
SW		 1844 }
1845
de3d3530
SW		 1846 err = send_mpa_reply(ep, conn_param->private_data,
1847 conn_param->private_data_len);
1848 if (err)
6e47fe43 1849 goto err1;
de3d3530 1850
de3d3530
SW		 1851
1852 state_set(&ep->com, FPDU_MODE);
1853 established_upcall(ep);
1854 put_ep(&ep->com);
1855 return 0;
6e47fe43 1856err1:
de3d3530
SW		 1857 ep->com.cm_id = NULL;
1858 ep->com.qp = NULL;
1859 cm_id->rem_ref(cm_id);
6e47fe43 1860err:
b038ced7
SW		 1861 put_ep(&ep->com);
1862 return err;
1863}
1864
8704e9a8
SW		 1865static int is_loopback_dst(struct iw_cm_id *cm_id)
1866{
1867 struct net_device *dev;
1868
1869 dev = ip_dev_find(&init_net, cm_id->remote_addr.sin_addr.s_addr);
1870 if (!dev)
1871 return 0;
1872 dev_put(dev);
1873 return 1;
1874}
1875
b038ced7
SW		 1876int iwch_connect(struct iw_cm_id *cm_id, struct iw_cm_conn_param *conn_param)
1877{
1878 int err = 0;
1879 struct iwch_dev *h = to_iwch_dev(cm_id->device);
1880 struct iwch_ep *ep;
1881 struct rtable *rt;
1882
8704e9a8
SW		 1883 if (is_loopback_dst(cm_id)) {
1884 err = -ENOSYS;
1885 goto out;
1886 }
1887
b038ced7
SW		 1888 ep = alloc_ep(sizeof(*ep), GFP_KERNEL);
1889 if (!ep) {
33718363 1890 printk(KERN_ERR MOD "%s - cannot alloc ep.\n", __func__);
b038ced7
SW		 1891 err = -ENOMEM;
1892 goto out;
1893 }
1894 init_timer(&ep->timer);
1895 ep->plen = conn_param->private_data_len;
1896 if (ep->plen)
1897 memcpy(ep->mpa_pkt + sizeof(struct mpa_message),
1898 conn_param->private_data, ep->plen);
1899 ep->ird = conn_param->ird;
1900 ep->ord = conn_param->ord;
96ac7e88
SW		 1901
1902 if (peer2peer && ep->ord == 0)
1903 ep->ord = 1;
1904
b038ced7
SW		 1905 ep->com.tdev = h->rdev.t3cdev_p;
1906
1907 cm_id->add_ref(cm_id);
1908 ep->com.cm_id = cm_id;
1909 ep->com.qp = get_qhp(h, conn_param->qpn);
1910 BUG_ON(!ep->com.qp);
33718363 1911 PDBG("%s qpn 0x%x qp %p cm_id %p\n", __func__, conn_param->qpn,
b038ced7
SW		 1912 ep->com.qp, cm_id);
1913
1914 /*
1915 * Allocate an active TID to initiate a TCP connection.
1916 */
1917 ep->atid = cxgb3_alloc_atid(h->rdev.t3cdev_p, &t3c_client, ep);
1918 if (ep->atid == -1) {
33718363 1919 printk(KERN_ERR MOD "%s - cannot alloc atid.\n", __func__);
b038ced7
SW		 1920 err = -ENOMEM;
1921 goto fail2;
1922 }
1923
1924 /* find a route */
1925 rt = find_route(h->rdev.t3cdev_p,
1926 cm_id->local_addr.sin_addr.s_addr,
1927 cm_id->remote_addr.sin_addr.s_addr,
1928 cm_id->local_addr.sin_port,
1929 cm_id->remote_addr.sin_port, IPTOS_LOWDELAY);
1930 if (!rt) {
33718363 1931 printk(KERN_ERR MOD "%s - cannot find route.\n", __func__);
b038ced7
SW		 1932 err = -EHOSTUNREACH;
1933 goto fail3;
1934 }
1935 ep->dst = &rt->u.dst;
1936
1937 /* get a l2t entry */
1938 ep->l2t = t3_l2t_get(ep->com.tdev, ep->dst->neighbour,
1939 ep->dst->neighbour->dev);
1940 if (!ep->l2t) {
33718363 1941 printk(KERN_ERR MOD "%s - cannot alloc l2e.\n", __func__);
b038ced7
SW		 1942 err = -ENOMEM;
1943 goto fail4;
1944 }
1945
1946 state_set(&ep->com, CONNECTING);
1947 ep->tos = IPTOS_LOWDELAY;
1948 ep->com.local_addr = cm_id->local_addr;
1949 ep->com.remote_addr = cm_id->remote_addr;
1950
1951 /* send connect request to rnic */
1952 err = send_connect(ep);
1953 if (!err)
1954 goto out;
1955
1956 l2t_release(L2DATA(h->rdev.t3cdev_p), ep->l2t);
1957fail4:
1958 dst_release(ep->dst);
1959fail3:
1960 cxgb3_free_atid(ep->com.tdev, ep->atid);
1961fail2:
dc35fac9 1962 cm_id->rem_ref(cm_id);
b038ced7
SW		 1963 put_ep(&ep->com);
1964out:
1965 return err;
1966}
1967
1968int iwch_create_listen(struct iw_cm_id *cm_id, int backlog)
1969{
1970 int err = 0;
1971 struct iwch_dev *h = to_iwch_dev(cm_id->device);
1972 struct iwch_listen_ep *ep;
1973
1974
1975 might_sleep();
1976
1977 ep = alloc_ep(sizeof(*ep), GFP_KERNEL);
1978 if (!ep) {
33718363 1979 printk(KERN_ERR MOD "%s - cannot alloc ep.\n", __func__);
b038ced7
SW		 1980 err = -ENOMEM;
1981 goto fail1;
1982 }
33718363 1983 PDBG("%s ep %p\n", __func__, ep);
b038ced7
SW		 1984 ep->com.tdev = h->rdev.t3cdev_p;
1985 cm_id->add_ref(cm_id);
1986 ep->com.cm_id = cm_id;
1987 ep->backlog = backlog;
1988 ep->com.local_addr = cm_id->local_addr;
1989
1990 /*
1991 * Allocate a server TID.
1992 */
1993 ep->stid = cxgb3_alloc_stid(h->rdev.t3cdev_p, &t3c_client, ep);
1994 if (ep->stid == -1) {
33718363 1995 printk(KERN_ERR MOD "%s - cannot alloc atid.\n", __func__);
b038ced7
SW		 1996 err = -ENOMEM;
1997 goto fail2;
1998 }
1999
2000 state_set(&ep->com, LISTEN);
2001 err = listen_start(ep);
2002 if (err)
2003 goto fail3;
2004
2005 /* wait for pass_open_rpl */
2006 wait_event(ep->com.waitq, ep->com.rpl_done);
2007 err = ep->com.rpl_err;
2008 if (!err) {
2009 cm_id->provider_data = ep;
2010 goto out;
2011 }
2012fail3:
2013 cxgb3_free_stid(ep->com.tdev, ep->stid);
2014fail2:
1b07db70 2015 cm_id->rem_ref(cm_id);
b038ced7
SW		 2016 put_ep(&ep->com);
2017fail1:
2018out:
2019 return err;
2020}
2021
2022int iwch_destroy_listen(struct iw_cm_id *cm_id)
2023{
2024 int err;
2025 struct iwch_listen_ep *ep = to_listen_ep(cm_id);
2026
33718363 2027 PDBG("%s ep %p\n", __func__, ep);
b038ced7
SW		 2028
2029 might_sleep();
2030 state_set(&ep->com, DEAD);
2031 ep->com.rpl_done = 0;
2032 ep->com.rpl_err = 0;
2033 err = listen_stop(ep);
04b5d028
SW		 2034 if (err)
2035 goto done;
b038ced7
SW		 2036 wait_event(ep->com.waitq, ep->com.rpl_done);
2037 cxgb3_free_stid(ep->com.tdev, ep->stid);
04b5d028 2038done:
b038ced7
SW		 2039 err = ep->com.rpl_err;
2040 cm_id->rem_ref(cm_id);
2041 put_ep(&ep->com);
2042 return err;
2043}
2044
2045int iwch_ep_disconnect(struct iwch_ep *ep, int abrupt, gfp_t gfp)
2046{
2047 int ret=0;
2048 unsigned long flags;
2049 int close = 0;
04b5d028
SW		 2050 int fatal = 0;
2051 struct t3cdev *tdev;
2052 struct cxio_rdev *rdev;
b038ced7
SW		 2053
2054 spin_lock_irqsave(&ep->com.lock, flags);
2055
33718363 2056 PDBG("%s ep %p state %s, abrupt %d\n", __func__, ep,
b038ced7
SW		 2057 states[ep->com.state], abrupt);
2058
04b5d028
SW		 2059 tdev = (struct t3cdev *)ep->com.tdev;
2060 rdev = (struct cxio_rdev *)tdev->ulp;
2061 if (cxio_fatal_error(rdev)) {
2062 fatal = 1;
2063 close_complete_upcall(ep);
2064 ep->com.state = DEAD;
2065 }
b038ced7
SW		 2066 switch (ep->com.state) {
2067 case MPA_REQ_WAIT:
2068 case MPA_REQ_SENT:
2069 case MPA_REQ_RCVD:
2070 case MPA_REP_SENT:
2071 case FPDU_MODE:
b038ced7 2072 close = 1;
989a1780
SW		 2073 if (abrupt)
2074 ep->com.state = ABORTING;
2075 else {
2076 ep->com.state = CLOSING;
2077 start_ep_timer(ep);
2078 }
6e47fe43 2079 set_bit(CLOSE_SENT, &ep->com.flags);
b038ced7
SW		 2080 break;
2081 case CLOSING:
6e47fe43
SW		 2082 if (!test_and_set_bit(CLOSE_SENT, &ep->com.flags)) {
2083 close = 1;
2084 if (abrupt) {
2085 stop_ep_timer(ep);
2086 ep->com.state = ABORTING;
2087 } else
2088 ep->com.state = MORIBUND;
2089 }
b038ced7
SW		 2090 break;
2091 case MORIBUND:
989a1780
SW		 2092 case ABORTING:
2093 case DEAD:
2094 PDBG("%s ignoring disconnect ep %p state %u\n",
2095 __func__, ep, ep->com.state);
b038ced7
SW		 2096 break;
2097 default:
2098 BUG();
2099 break;
2100 }
989a1780 2101
b038ced7
SW		 2102 spin_unlock_irqrestore(&ep->com.lock, flags);
2103 if (close) {
2104 if (abrupt)
2105 ret = send_abort(ep, NULL, gfp);
2106 else
2107 ret = send_halfclose(ep, gfp);
04b5d028
SW		 2108 if (ret)
2109 fatal = 1;
b038ced7 2110 }
04b5d028
SW		 2111 if (fatal)
2112 release_ep_resources(ep);
b038ced7
SW		 2113 return ret;
2114}
2115
2116int iwch_ep_redirect(void *ctx, struct dst_entry *old, struct dst_entry *new,
2117 struct l2t_entry *l2t)
2118{
2119 struct iwch_ep *ep = ctx;
2120
2121 if (ep->dst != old)
2122 return 0;
2123
33718363 2124 PDBG("%s ep %p redirect to dst %p l2t %p\n", __func__, ep, new,
b038ced7
SW		 2125 l2t);
2126 dst_hold(new);
2127 l2t_release(L2DATA(ep->com.tdev), ep->l2t);
2128 ep->l2t = l2t;
2129 dst_release(old);
2130 ep->dst = new;
2131 return 1;
2132}
2133
2134/*
2135 * All the CM events are handled on a work queue to have a safe context.
617c9a7e 2136 * These are the real handlers that are called from the work queue.
b038ced7 2137 */
617c9a7e
RD		 2138static const cxgb3_cpl_handler_func work_handlers[NUM_CPL_CMDS] = {
2139 [CPL_ACT_ESTABLISH] = act_establish,
2140 [CPL_ACT_OPEN_RPL] = act_open_rpl,
2141 [CPL_RX_DATA] = rx_data,
2142 [CPL_TX_DMA_ACK] = tx_ack,
2143 [CPL_ABORT_RPL_RSS] = abort_rpl,
2144 [CPL_ABORT_RPL] = abort_rpl,
2145 [CPL_PASS_OPEN_RPL] = pass_open_rpl,
2146 [CPL_CLOSE_LISTSRV_RPL] = close_listsrv_rpl,
2147 [CPL_PASS_ACCEPT_REQ] = pass_accept_req,
2148 [CPL_PASS_ESTABLISH] = pass_establish,
2149 [CPL_PEER_CLOSE] = peer_close,
2150 [CPL_ABORT_REQ_RSS] = peer_abort,
2151 [CPL_CLOSE_CON_RPL] = close_con_rpl,
2152 [CPL_RDMA_TERMINATE] = terminate,
2153 [CPL_RDMA_EC_STATUS] = ec_status,
2154};
2155
2156static void process_work(struct work_struct *work)
2157{
2158 struct sk_buff *skb = NULL;
2159 void *ep;
2160 struct t3cdev *tdev;
2161 int ret;
2162
2163 while ((skb = skb_dequeue(&rxq))) {
2164 ep = *((void **) (skb->cb));
2165 tdev = *((struct t3cdev **) (skb->cb + sizeof(void *)));
2166 ret = work_handlers[G_OPCODE(ntohl((__force __be32)skb->csum))](tdev, skb, ep);
2167 if (ret & CPL_RET_BUF_DONE)
2168 kfree_skb(skb);
2169
2170 /*
2171 * ep was referenced in sched(), and is freed here.
2172 */
2173 put_ep((struct iwch_ep_common *)ep);
2174 }
2175}
2176
2177static DECLARE_WORK(skb_work, process_work);
2178
b038ced7
SW		 2179static int sched(struct t3cdev *tdev, struct sk_buff *skb, void *ctx)
2180{
2181 struct iwch_ep_common *epc = ctx;
2182
2183 get_ep(epc);
2184
2185 /*
2186 * Save ctx and tdev in the skb->cb area.
2187 */
2188 *((void **) skb->cb) = ctx;
2189 *((struct t3cdev **) (skb->cb + sizeof(void *))) = tdev;
2190
2191 /*
2192 * Queue the skb and schedule the worker thread.
2193 */
2194 skb_queue_tail(&rxq, skb);
2195 queue_work(workq, &skb_work);
2196 return 0;
2197}
2198
1ca19770
SW		 2199static int set_tcb_rpl(struct t3cdev *tdev, struct sk_buff *skb, void *ctx)
2200{
2201 struct cpl_set_tcb_rpl *rpl = cplhdr(skb);
2202
2203 if (rpl->status != CPL_ERR_NONE) {
2204 printk(KERN_ERR MOD "Unexpected SET_TCB_RPL status %u "
2205 "for tid %u\n", rpl->status, GET_TID(rpl));
2206 }
2207 return CPL_RET_BUF_DONE;
2208}
2209
617c9a7e
RD		 2210/*
2211 * All upcalls from the T3 Core go to sched() to schedule the
2212 * processing on a work queue.
2213 */
2214cxgb3_cpl_handler_func t3c_handlers[NUM_CPL_CMDS] = {
2215 [CPL_ACT_ESTABLISH] = sched,
2216 [CPL_ACT_OPEN_RPL] = sched,
2217 [CPL_RX_DATA] = sched,
2218 [CPL_TX_DMA_ACK] = sched,
2219 [CPL_ABORT_RPL_RSS] = sched,
2220 [CPL_ABORT_RPL] = sched,
2221 [CPL_PASS_OPEN_RPL] = sched,
2222 [CPL_CLOSE_LISTSRV_RPL] = sched,
2223 [CPL_PASS_ACCEPT_REQ] = sched,
2224 [CPL_PASS_ESTABLISH] = sched,
2225 [CPL_PEER_CLOSE] = sched,
2226 [CPL_CLOSE_CON_RPL] = sched,
2227 [CPL_ABORT_REQ_RSS] = sched,
2228 [CPL_RDMA_TERMINATE] = sched,
2229 [CPL_RDMA_EC_STATUS] = sched,
2230 [CPL_SET_TCB_RPL] = set_tcb_rpl,
2231};
2232
b038ced7
SW		 2233int __init iwch_cm_init(void)
2234{
2235 skb_queue_head_init(&rxq);
2236
2237 workq = create_singlethread_workqueue("iw_cxgb3");
2238 if (!workq)
2239 return -ENOMEM;
2240
b038ced7
SW		 2241 return 0;
2242}
2243
2244void __exit iwch_cm_term(void)
2245{
2246 flush_workqueue(workq);
2247 destroy_workqueue(workq);
2248}
kernel source for telekom puls (alcatel/mediatek)