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RDMA/cxgb4: Fix race in fini path
[net-next-2.6.git] / drivers / infiniband / hw / cxgb4 / cm.c
CommitLineData
cfdda9d7
SW		 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
48static 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
ba6d3925
SW		 64static int dack_mode;
65module_param(dack_mode, int, 0644);
66MODULE_PARM_DESC(dack_mode, "Delayed ack mode (default=0)");
67
be4c9bad
RD		 68int c4iw_max_read_depth = 8;
69module_param(c4iw_max_read_depth, int, 0644);
70MODULE_PARM_DESC(c4iw_max_read_depth, "Per-connection max ORD/IRD (default=8)");
71
cfdda9d7
SW		 72static int enable_tcp_timestamps;
73module_param(enable_tcp_timestamps, int, 0644);
74MODULE_PARM_DESC(enable_tcp_timestamps, "Enable tcp timestamps (default=0)");
75
76static int enable_tcp_sack;
77module_param(enable_tcp_sack, int, 0644);
78MODULE_PARM_DESC(enable_tcp_sack, "Enable tcp SACK (default=0)");
79
80static int enable_tcp_window_scaling = 1;
81module_param(enable_tcp_window_scaling, int, 0644);
82MODULE_PARM_DESC(enable_tcp_window_scaling,
83 "Enable tcp window scaling (default=1)");
84
85int c4iw_debug;
86module_param(c4iw_debug, int, 0644);
87MODULE_PARM_DESC(c4iw_debug, "Enable debug logging (default=0)");
88
89static int peer2peer;
90module_param(peer2peer, int, 0644);
91MODULE_PARM_DESC(peer2peer, "Support peer2peer ULPs (default=0)");
92
93static int p2p_type = FW_RI_INIT_P2PTYPE_READ_REQ;
94module_param(p2p_type, int, 0644);
95MODULE_PARM_DESC(p2p_type, "RDMAP opcode to use for the RTR message: "
96 "1=RDMA_READ 0=RDMA_WRITE (default 1)");
97
98static int ep_timeout_secs = 60;
99module_param(ep_timeout_secs, int, 0644);
100MODULE_PARM_DESC(ep_timeout_secs, "CM Endpoint operation timeout "
101 "in seconds (default=60)");
102
103static int mpa_rev = 1;
104module_param(mpa_rev, int, 0644);
105MODULE_PARM_DESC(mpa_rev, "MPA Revision, 0 supports amso1100, "
106 "1 is spec compliant. (default=1)");
107
108static int markers_enabled;
109module_param(markers_enabled, int, 0644);
110MODULE_PARM_DESC(markers_enabled, "Enable MPA MARKERS (default(0)=disabled)");
111
112static int crc_enabled = 1;
113module_param(crc_enabled, int, 0644);
114MODULE_PARM_DESC(crc_enabled, "Enable MPA CRC (default(1)=enabled)");
115
116static int rcv_win = 256 * 1024;
117module_param(rcv_win, int, 0644);
118MODULE_PARM_DESC(rcv_win, "TCP receive window in bytes (default=256KB)");
119
120static int snd_win = 32 * 1024;
121module_param(snd_win, int, 0644);
122MODULE_PARM_DESC(snd_win, "TCP send window in bytes (default=32KB)");
123
cfdda9d7 124static struct workqueue_struct *workq;
cfdda9d7
SW		 125
126static struct sk_buff_head rxq;
cfdda9d7
SW		 127
128static struct sk_buff *get_skb(struct sk_buff *skb, int len, gfp_t gfp);
129static void ep_timeout(unsigned long arg);
130static void connect_reply_upcall(struct c4iw_ep *ep, int status);
131
be4c9bad
RD		 132static LIST_HEAD(timeout_list);
133static spinlock_t timeout_lock;
134
cfdda9d7
SW		 135static 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
149static 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
162static 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;
176}
177
178int 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;
191}
192
193static 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
208static 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
220static enum c4iw_ep_state state_read(struct c4iw_ep_common *epc)
221{
222 unsigned long flags;
223 enum c4iw_ep_state state;
224
225 spin_lock_irqsave(&epc->lock, flags);
226 state = epc->state;
227 spin_unlock_irqrestore(&epc->lock, flags);
228 return state;
229}
230
231static void __state_set(struct c4iw_ep_common *epc, enum c4iw_ep_state new)
232{
233 epc->state = new;
234}
235
236static void state_set(struct c4iw_ep_common *epc, enum c4iw_ep_state new)
237{
238 unsigned long flags;
239
240 spin_lock_irqsave(&epc->lock, flags);
241 PDBG("%s - %s -> %s\n", __func__, states[epc->state], states[new]);
242 __state_set(epc, new);
243 spin_unlock_irqrestore(&epc->lock, flags);
244 return;
245}
246
247static void *alloc_ep(int size, gfp_t gfp)
248{
249 struct c4iw_ep_common *epc;
250
251 epc = kzalloc(size, gfp);
252 if (epc) {
253 kref_init(&epc->kref);
254 spin_lock_init(&epc->lock);
255 init_waitqueue_head(&epc->waitq);
256 }
257 PDBG("%s alloc ep %p\n", __func__, epc);
258 return epc;
259}
260
261void _c4iw_free_ep(struct kref *kref)
262{
263 struct c4iw_ep *ep;
264
265 ep = container_of(kref, struct c4iw_ep, com.kref);
266 PDBG("%s ep %p state %s\n", __func__, ep, states[state_read(&ep->com)]);
267 if (test_bit(RELEASE_RESOURCES, &ep->com.flags)) {
268 cxgb4_remove_tid(ep->com.dev->rdev.lldi.tids, 0, ep->hwtid);
269 dst_release(ep->dst);
270 cxgb4_l2t_release(ep->l2t);
271 }
272 kfree(ep);
273}
274
275static void release_ep_resources(struct c4iw_ep *ep)
276{
277 set_bit(RELEASE_RESOURCES, &ep->com.flags);
278 c4iw_put_ep(&ep->com);
279}
280
cfdda9d7
SW		 281static int status2errno(int status)
282{
283 switch (status) {
284 case CPL_ERR_NONE:
285 return 0;
286 case CPL_ERR_CONN_RESET:
287 return -ECONNRESET;
288 case CPL_ERR_ARP_MISS:
289 return -EHOSTUNREACH;
290 case CPL_ERR_CONN_TIMEDOUT:
291 return -ETIMEDOUT;
292 case CPL_ERR_TCAM_FULL:
293 return -ENOMEM;
294 case CPL_ERR_CONN_EXIST:
295 return -EADDRINUSE;
296 default:
297 return -EIO;
298 }
299}
300
301/*
302 * Try and reuse skbs already allocated...
303 */
304static struct sk_buff *get_skb(struct sk_buff *skb, int len, gfp_t gfp)
305{
306 if (skb && !skb_is_nonlinear(skb) && !skb_cloned(skb)) {
307 skb_trim(skb, 0);
308 skb_get(skb);
309 skb_reset_transport_header(skb);
310 } else {
311 skb = alloc_skb(len, gfp);
312 }
313 return skb;
314}
315
316static struct rtable *find_route(struct c4iw_dev *dev, __be32 local_ip,
317 __be32 peer_ip, __be16 local_port,
318 __be16 peer_port, u8 tos)
319{
320 struct rtable *rt;
321 struct flowi fl = {
322 .oif = 0,
323 .nl_u = {
324 .ip4_u = {
325 .daddr = peer_ip,
326 .saddr = local_ip,
327 .tos = tos}
328 },
329 .proto = IPPROTO_TCP,
330 .uli_u = {
331 .ports = {
332 .sport = local_port,
333 .dport = peer_port}
334 }
335 };
336
337 if (ip_route_output_flow(&init_net, &rt, &fl, NULL, 0))
338 return NULL;
339 return rt;
340}
341
342static void arp_failure_discard(void *handle, struct sk_buff *skb)
343{
344 PDBG("%s c4iw_dev %p\n", __func__, handle);
345 kfree_skb(skb);
346}
347
348/*
349 * Handle an ARP failure for an active open.
350 */
351static void act_open_req_arp_failure(void *handle, struct sk_buff *skb)
352{
353 printk(KERN_ERR MOD "ARP failure duing connect\n");
354 kfree_skb(skb);
355}
356
357/*
358 * Handle an ARP failure for a CPL_ABORT_REQ. Change it into a no RST variant
359 * and send it along.
360 */
361static void abort_arp_failure(void *handle, struct sk_buff *skb)
362{
363 struct c4iw_rdev *rdev = handle;
364 struct cpl_abort_req *req = cplhdr(skb);
365
366 PDBG("%s rdev %p\n", __func__, rdev);
367 req->cmd = CPL_ABORT_NO_RST;
368 c4iw_ofld_send(rdev, skb);
369}
370
371static void send_flowc(struct c4iw_ep *ep, struct sk_buff *skb)
372{
373 unsigned int flowclen = 80;
374 struct fw_flowc_wr *flowc;
375 int i;
376
377 skb = get_skb(skb, flowclen, GFP_KERNEL);
378 flowc = (struct fw_flowc_wr *)__skb_put(skb, flowclen);
379
380 flowc->op_to_nparams = cpu_to_be32(FW_WR_OP(FW_FLOWC_WR) |
381 FW_FLOWC_WR_NPARAMS(8));
382 flowc->flowid_len16 = cpu_to_be32(FW_WR_LEN16(DIV_ROUND_UP(flowclen,
383 16)) | FW_WR_FLOWID(ep->hwtid));
384
385 flowc->mnemval[0].mnemonic = FW_FLOWC_MNEM_PFNVFN;
386 flowc->mnemval[0].val = cpu_to_be32(0);
387 flowc->mnemval[1].mnemonic = FW_FLOWC_MNEM_CH;
388 flowc->mnemval[1].val = cpu_to_be32(ep->tx_chan);
389 flowc->mnemval[2].mnemonic = FW_FLOWC_MNEM_PORT;
390 flowc->mnemval[2].val = cpu_to_be32(ep->tx_chan);
391 flowc->mnemval[3].mnemonic = FW_FLOWC_MNEM_IQID;
392 flowc->mnemval[3].val = cpu_to_be32(ep->rss_qid);
393 flowc->mnemval[4].mnemonic = FW_FLOWC_MNEM_SNDNXT;
394 flowc->mnemval[4].val = cpu_to_be32(ep->snd_seq);
395 flowc->mnemval[5].mnemonic = FW_FLOWC_MNEM_RCVNXT;
396 flowc->mnemval[5].val = cpu_to_be32(ep->rcv_seq);
397 flowc->mnemval[6].mnemonic = FW_FLOWC_MNEM_SNDBUF;
398 flowc->mnemval[6].val = cpu_to_be32(snd_win);
399 flowc->mnemval[7].mnemonic = FW_FLOWC_MNEM_MSS;
400 flowc->mnemval[7].val = cpu_to_be32(ep->emss);
401 /* Pad WR to 16 byte boundary */
402 flowc->mnemval[8].mnemonic = 0;
403 flowc->mnemval[8].val = 0;
404 for (i = 0; i < 9; i++) {
405 flowc->mnemval[i].r4[0] = 0;
406 flowc->mnemval[i].r4[1] = 0;
407 flowc->mnemval[i].r4[2] = 0;
408 }
409
410 set_wr_txq(skb, CPL_PRIORITY_DATA, ep->txq_idx);
411 c4iw_ofld_send(&ep->com.dev->rdev, skb);
412}
413
414static int send_halfclose(struct c4iw_ep *ep, gfp_t gfp)
415{
416 struct cpl_close_con_req *req;
417 struct sk_buff *skb;
418 int wrlen = roundup(sizeof *req, 16);
419
420 PDBG("%s ep %p tid %u\n", __func__, ep, ep->hwtid);
421 skb = get_skb(NULL, wrlen, gfp);
422 if (!skb) {
423 printk(KERN_ERR MOD "%s - failed to alloc skb\n", __func__);
424 return -ENOMEM;
425 }
426 set_wr_txq(skb, CPL_PRIORITY_DATA, ep->txq_idx);
427 t4_set_arp_err_handler(skb, NULL, arp_failure_discard);
428 req = (struct cpl_close_con_req *) skb_put(skb, wrlen);
429 memset(req, 0, wrlen);
430 INIT_TP_WR(req, ep->hwtid);
431 OPCODE_TID(req) = cpu_to_be32(MK_OPCODE_TID(CPL_CLOSE_CON_REQ,
432 ep->hwtid));
433 return c4iw_l2t_send(&ep->com.dev->rdev, skb, ep->l2t);
434}
435
436static int send_abort(struct c4iw_ep *ep, struct sk_buff *skb, gfp_t gfp)
437{
438 struct cpl_abort_req *req;
439 int wrlen = roundup(sizeof *req, 16);
440
441 PDBG("%s ep %p tid %u\n", __func__, ep, ep->hwtid);
442 skb = get_skb(skb, wrlen, gfp);
443 if (!skb) {
444 printk(KERN_ERR MOD "%s - failed to alloc skb.\n",
445 __func__);
446 return -ENOMEM;
447 }
448 set_wr_txq(skb, CPL_PRIORITY_DATA, ep->txq_idx);
449 t4_set_arp_err_handler(skb, &ep->com.dev->rdev, abort_arp_failure);
450 req = (struct cpl_abort_req *) skb_put(skb, wrlen);
451 memset(req, 0, wrlen);
452 INIT_TP_WR(req, ep->hwtid);
453 OPCODE_TID(req) = cpu_to_be32(MK_OPCODE_TID(CPL_ABORT_REQ, ep->hwtid));
454 req->cmd = CPL_ABORT_SEND_RST;
455 return c4iw_l2t_send(&ep->com.dev->rdev, skb, ep->l2t);
456}
457
458static int send_connect(struct c4iw_ep *ep)
459{
460 struct cpl_act_open_req *req;
461 struct sk_buff *skb;
462 u64 opt0;
463 u32 opt2;
464 unsigned int mtu_idx;
465 int wscale;
466 int wrlen = roundup(sizeof *req, 16);
467
468 PDBG("%s ep %p atid %u\n", __func__, ep, ep->atid);
469
470 skb = get_skb(NULL, wrlen, GFP_KERNEL);
471 if (!skb) {
472 printk(KERN_ERR MOD "%s - failed to alloc skb.\n",
473 __func__);
474 return -ENOMEM;
475 }
476 set_wr_txq(skb, CPL_PRIORITY_SETUP, ep->txq_idx);
477
478 cxgb4_best_mtu(ep->com.dev->rdev.lldi.mtus, ep->mtu, &mtu_idx);
479 wscale = compute_wscale(rcv_win);
480 opt0 = KEEP_ALIVE(1) |
ba6d3925 481 DELACK(1) |
cfdda9d7
SW		 482 WND_SCALE(wscale) |
483 MSS_IDX(mtu_idx) |
484 L2T_IDX(ep->l2t->idx) |
485 TX_CHAN(ep->tx_chan) |
486 SMAC_SEL(ep->smac_idx) |
487 DSCP(ep->tos) |
488 RCV_BUFSIZ(rcv_win>>10);
489 opt2 = RX_CHANNEL(0) |
490 RSS_QUEUE_VALID | RSS_QUEUE(ep->rss_qid);
491 if (enable_tcp_timestamps)
492 opt2 |= TSTAMPS_EN(1);
493 if (enable_tcp_sack)
494 opt2 |= SACK_EN(1);
495 if (wscale && enable_tcp_window_scaling)
496 opt2 |= WND_SCALE_EN(1);
497 t4_set_arp_err_handler(skb, NULL, act_open_req_arp_failure);
498
499 req = (struct cpl_act_open_req *) skb_put(skb, wrlen);
500 INIT_TP_WR(req, 0);
501 OPCODE_TID(req) = cpu_to_be32(
502 MK_OPCODE_TID(CPL_ACT_OPEN_REQ, ((ep->rss_qid<<14)|ep->atid)));
503 req->local_port = ep->com.local_addr.sin_port;
504 req->peer_port = ep->com.remote_addr.sin_port;
505 req->local_ip = ep->com.local_addr.sin_addr.s_addr;
506 req->peer_ip = ep->com.remote_addr.sin_addr.s_addr;
507 req->opt0 = cpu_to_be64(opt0);
508 req->params = 0;
509 req->opt2 = cpu_to_be32(opt2);
510 return c4iw_l2t_send(&ep->com.dev->rdev, skb, ep->l2t);
511}
512
513static void send_mpa_req(struct c4iw_ep *ep, struct sk_buff *skb)
514{
515 int mpalen, wrlen;
516 struct fw_ofld_tx_data_wr *req;
517 struct mpa_message *mpa;
518
519 PDBG("%s ep %p tid %u pd_len %d\n", __func__, ep, ep->hwtid, ep->plen);
520
521 BUG_ON(skb_cloned(skb));
522
523 mpalen = sizeof(*mpa) + ep->plen;
524 wrlen = roundup(mpalen + sizeof *req, 16);
525 skb = get_skb(skb, wrlen, GFP_KERNEL);
526 if (!skb) {
527 connect_reply_upcall(ep, -ENOMEM);
528 return;
529 }
530 set_wr_txq(skb, CPL_PRIORITY_DATA, ep->txq_idx);
531
532 req = (struct fw_ofld_tx_data_wr *)skb_put(skb, wrlen);
533 memset(req, 0, wrlen);
534 req->op_to_immdlen = cpu_to_be32(
535 FW_WR_OP(FW_OFLD_TX_DATA_WR) |
536 FW_WR_COMPL(1) |
537 FW_WR_IMMDLEN(mpalen));
538 req->flowid_len16 = cpu_to_be32(
539 FW_WR_FLOWID(ep->hwtid) |
540 FW_WR_LEN16(wrlen >> 4));
541 req->plen = cpu_to_be32(mpalen);
542 req->tunnel_to_proxy = cpu_to_be32(
543 FW_OFLD_TX_DATA_WR_FLUSH(1) |
544 FW_OFLD_TX_DATA_WR_SHOVE(1));
545
546 mpa = (struct mpa_message *)(req + 1);
547 memcpy(mpa->key, MPA_KEY_REQ, sizeof(mpa->key));
548 mpa->flags = (crc_enabled ? MPA_CRC : 0) |
549 (markers_enabled ? MPA_MARKERS : 0);
550 mpa->private_data_size = htons(ep->plen);
551 mpa->revision = mpa_rev;
552
553 if (ep->plen)
554 memcpy(mpa->private_data, ep->mpa_pkt + sizeof(*mpa), ep->plen);
555
556 /*
557 * Reference the mpa skb. This ensures the data area
558 * will remain in memory until the hw acks the tx.
559 * Function fw4_ack() will deref it.
560 */
561 skb_get(skb);
562 t4_set_arp_err_handler(skb, NULL, arp_failure_discard);
563 BUG_ON(ep->mpa_skb);
564 ep->mpa_skb = skb;
565 c4iw_l2t_send(&ep->com.dev->rdev, skb, ep->l2t);
566 start_ep_timer(ep);
567 state_set(&ep->com, MPA_REQ_SENT);
568 ep->mpa_attr.initiator = 1;
569 return;
570}
571
572static int send_mpa_reject(struct c4iw_ep *ep, const void *pdata, u8 plen)
573{
574 int mpalen, wrlen;
575 struct fw_ofld_tx_data_wr *req;
576 struct mpa_message *mpa;
577 struct sk_buff *skb;
578
579 PDBG("%s ep %p tid %u pd_len %d\n", __func__, ep, ep->hwtid, ep->plen);
580
581 mpalen = sizeof(*mpa) + plen;
582 wrlen = roundup(mpalen + sizeof *req, 16);
583
584 skb = get_skb(NULL, wrlen, GFP_KERNEL);
585 if (!skb) {
586 printk(KERN_ERR MOD "%s - cannot alloc skb!\n", __func__);
587 return -ENOMEM;
588 }
589 set_wr_txq(skb, CPL_PRIORITY_DATA, ep->txq_idx);
590
591 req = (struct fw_ofld_tx_data_wr *)skb_put(skb, wrlen);
592 memset(req, 0, wrlen);
593 req->op_to_immdlen = cpu_to_be32(
594 FW_WR_OP(FW_OFLD_TX_DATA_WR) |
595 FW_WR_COMPL(1) |
596 FW_WR_IMMDLEN(mpalen));
597 req->flowid_len16 = cpu_to_be32(
598 FW_WR_FLOWID(ep->hwtid) |
599 FW_WR_LEN16(wrlen >> 4));
600 req->plen = cpu_to_be32(mpalen);
601 req->tunnel_to_proxy = cpu_to_be32(
602 FW_OFLD_TX_DATA_WR_FLUSH(1) |
603 FW_OFLD_TX_DATA_WR_SHOVE(1));
604
605 mpa = (struct mpa_message *)(req + 1);
606 memset(mpa, 0, sizeof(*mpa));
607 memcpy(mpa->key, MPA_KEY_REP, sizeof(mpa->key));
608 mpa->flags = MPA_REJECT;
609 mpa->revision = mpa_rev;
610 mpa->private_data_size = htons(plen);
611 if (plen)
612 memcpy(mpa->private_data, pdata, plen);
613
614 /*
615 * Reference the mpa skb again. This ensures the data area
616 * will remain in memory until the hw acks the tx.
617 * Function fw4_ack() will deref it.
618 */
619 skb_get(skb);
620 set_wr_txq(skb, CPL_PRIORITY_DATA, ep->txq_idx);
621 t4_set_arp_err_handler(skb, NULL, arp_failure_discard);
622 BUG_ON(ep->mpa_skb);
623 ep->mpa_skb = skb;
624 return c4iw_l2t_send(&ep->com.dev->rdev, skb, ep->l2t);
625}
626
627static int send_mpa_reply(struct c4iw_ep *ep, const void *pdata, u8 plen)
628{
629 int mpalen, wrlen;
630 struct fw_ofld_tx_data_wr *req;
631 struct mpa_message *mpa;
632 struct sk_buff *skb;
633
634 PDBG("%s ep %p tid %u pd_len %d\n", __func__, ep, ep->hwtid, ep->plen);
635
636 mpalen = sizeof(*mpa) + plen;
637 wrlen = roundup(mpalen + sizeof *req, 16);
638
639 skb = get_skb(NULL, wrlen, GFP_KERNEL);
640 if (!skb) {
641 printk(KERN_ERR MOD "%s - cannot alloc skb!\n", __func__);
642 return -ENOMEM;
643 }
644 set_wr_txq(skb, CPL_PRIORITY_DATA, ep->txq_idx);
645
646 req = (struct fw_ofld_tx_data_wr *) skb_put(skb, wrlen);
647 memset(req, 0, wrlen);
648 req->op_to_immdlen = cpu_to_be32(
649 FW_WR_OP(FW_OFLD_TX_DATA_WR) |
650 FW_WR_COMPL(1) |
651 FW_WR_IMMDLEN(mpalen));
652 req->flowid_len16 = cpu_to_be32(
653 FW_WR_FLOWID(ep->hwtid) |
654 FW_WR_LEN16(wrlen >> 4));
655 req->plen = cpu_to_be32(mpalen);
656 req->tunnel_to_proxy = cpu_to_be32(
657 FW_OFLD_TX_DATA_WR_FLUSH(1) |
658 FW_OFLD_TX_DATA_WR_SHOVE(1));
659
660 mpa = (struct mpa_message *)(req + 1);
661 memset(mpa, 0, sizeof(*mpa));
662 memcpy(mpa->key, MPA_KEY_REP, sizeof(mpa->key));
663 mpa->flags = (ep->mpa_attr.crc_enabled ? MPA_CRC : 0) |
664 (markers_enabled ? MPA_MARKERS : 0);
665 mpa->revision = mpa_rev;
666 mpa->private_data_size = htons(plen);
667 if (plen)
668 memcpy(mpa->private_data, pdata, plen);
669
670 /*
671 * Reference the mpa skb. This ensures the data area
672 * will remain in memory until the hw acks the tx.
673 * Function fw4_ack() will deref it.
674 */
675 skb_get(skb);
676 t4_set_arp_err_handler(skb, NULL, arp_failure_discard);
677 ep->mpa_skb = skb;
678 state_set(&ep->com, MPA_REP_SENT);
679 return c4iw_l2t_send(&ep->com.dev->rdev, skb, ep->l2t);
680}
681
682static int act_establish(struct c4iw_dev *dev, struct sk_buff *skb)
683{
684 struct c4iw_ep *ep;
685 struct cpl_act_establish *req = cplhdr(skb);
686 unsigned int tid = GET_TID(req);
687 unsigned int atid = GET_TID_TID(ntohl(req->tos_atid));
688 struct tid_info *t = dev->rdev.lldi.tids;
689
690 ep = lookup_atid(t, atid);
691
692 PDBG("%s ep %p tid %u snd_isn %u rcv_isn %u\n", __func__, ep, tid,
693 be32_to_cpu(req->snd_isn), be32_to_cpu(req->rcv_isn));
694
695 dst_confirm(ep->dst);
696
697 /* setup the hwtid for this connection */
698 ep->hwtid = tid;
699 cxgb4_insert_tid(t, ep, tid);
700
701 ep->snd_seq = be32_to_cpu(req->snd_isn);
702 ep->rcv_seq = be32_to_cpu(req->rcv_isn);
703
704 set_emss(ep, ntohs(req->tcp_opt));
705
706 /* dealloc the atid */
707 cxgb4_free_atid(t, atid);
708
709 /* start MPA negotiation */
710 send_flowc(ep, NULL);
711 send_mpa_req(ep, skb);
712
713 return 0;
714}
715
716static void close_complete_upcall(struct c4iw_ep *ep)
717{
718 struct iw_cm_event event;
719
720 PDBG("%s ep %p tid %u\n", __func__, ep, ep->hwtid);
721 memset(&event, 0, sizeof(event));
722 event.event = IW_CM_EVENT_CLOSE;
723 if (ep->com.cm_id) {
724 PDBG("close complete delivered ep %p cm_id %p tid %u\n",
725 ep, ep->com.cm_id, ep->hwtid);
726 ep->com.cm_id->event_handler(ep->com.cm_id, &event);
727 ep->com.cm_id->rem_ref(ep->com.cm_id);
728 ep->com.cm_id = NULL;
729 ep->com.qp = NULL;
730 }
731}
732
733static int abort_connection(struct c4iw_ep *ep, struct sk_buff *skb, gfp_t gfp)
734{
735 PDBG("%s ep %p tid %u\n", __func__, ep, ep->hwtid);
736 close_complete_upcall(ep);
737 state_set(&ep->com, ABORTING);
738 return send_abort(ep, skb, gfp);
739}
740
741static void peer_close_upcall(struct c4iw_ep *ep)
742{
743 struct iw_cm_event event;
744
745 PDBG("%s ep %p tid %u\n", __func__, ep, ep->hwtid);
746 memset(&event, 0, sizeof(event));
747 event.event = IW_CM_EVENT_DISCONNECT;
748 if (ep->com.cm_id) {
749 PDBG("peer close delivered ep %p cm_id %p tid %u\n",
750 ep, ep->com.cm_id, ep->hwtid);
751 ep->com.cm_id->event_handler(ep->com.cm_id, &event);
752 }
753}
754
755static void peer_abort_upcall(struct c4iw_ep *ep)
756{
757 struct iw_cm_event event;
758
759 PDBG("%s ep %p tid %u\n", __func__, ep, ep->hwtid);
760 memset(&event, 0, sizeof(event));
761 event.event = IW_CM_EVENT_CLOSE;
762 event.status = -ECONNRESET;
763 if (ep->com.cm_id) {
764 PDBG("abort delivered ep %p cm_id %p tid %u\n", ep,
765 ep->com.cm_id, ep->hwtid);
766 ep->com.cm_id->event_handler(ep->com.cm_id, &event);
767 ep->com.cm_id->rem_ref(ep->com.cm_id);
768 ep->com.cm_id = NULL;
769 ep->com.qp = NULL;
770 }
771}
772
773static void connect_reply_upcall(struct c4iw_ep *ep, int status)
774{
775 struct iw_cm_event event;
776
777 PDBG("%s ep %p tid %u status %d\n", __func__, ep, ep->hwtid, status);
778 memset(&event, 0, sizeof(event));
779 event.event = IW_CM_EVENT_CONNECT_REPLY;
780 event.status = status;
781 event.local_addr = ep->com.local_addr;
782 event.remote_addr = ep->com.remote_addr;
783
784 if ((status == 0) || (status == -ECONNREFUSED)) {
785 event.private_data_len = ep->plen;
786 event.private_data = ep->mpa_pkt + sizeof(struct mpa_message);
787 }
85963e4c
RD		 788
789 PDBG("%s ep %p tid %u status %d\n", __func__, ep,
790 ep->hwtid, status);
791 ep->com.cm_id->event_handler(ep->com.cm_id, &event);
792
cfdda9d7
SW		 793 if (status < 0) {
794 ep->com.cm_id->rem_ref(ep->com.cm_id);
795 ep->com.cm_id = NULL;
796 ep->com.qp = NULL;
797 }
798}
799
800static void connect_request_upcall(struct c4iw_ep *ep)
801{
802 struct iw_cm_event event;
803
804 PDBG("%s ep %p tid %u\n", __func__, ep, ep->hwtid);
805 memset(&event, 0, sizeof(event));
806 event.event = IW_CM_EVENT_CONNECT_REQUEST;
807 event.local_addr = ep->com.local_addr;
808 event.remote_addr = ep->com.remote_addr;
809 event.private_data_len = ep->plen;
810 event.private_data = ep->mpa_pkt + sizeof(struct mpa_message);
811 event.provider_data = ep;
812 if (state_read(&ep->parent_ep->com) != DEAD) {
813 c4iw_get_ep(&ep->com);
814 ep->parent_ep->com.cm_id->event_handler(
815 ep->parent_ep->com.cm_id,
816 &event);
817 }
818 c4iw_put_ep(&ep->parent_ep->com);
819 ep->parent_ep = NULL;
820}
821
822static void established_upcall(struct c4iw_ep *ep)
823{
824 struct iw_cm_event event;
825
826 PDBG("%s ep %p tid %u\n", __func__, ep, ep->hwtid);
827 memset(&event, 0, sizeof(event));
828 event.event = IW_CM_EVENT_ESTABLISHED;
829 if (ep->com.cm_id) {
830 PDBG("%s ep %p tid %u\n", __func__, ep, ep->hwtid);
831 ep->com.cm_id->event_handler(ep->com.cm_id, &event);
832 }
833}
834
835static int update_rx_credits(struct c4iw_ep *ep, u32 credits)
836{
837 struct cpl_rx_data_ack *req;
838 struct sk_buff *skb;
839 int wrlen = roundup(sizeof *req, 16);
840
841 PDBG("%s ep %p tid %u credits %u\n", __func__, ep, ep->hwtid, credits);
842 skb = get_skb(NULL, wrlen, GFP_KERNEL);
843 if (!skb) {
844 printk(KERN_ERR MOD "update_rx_credits - cannot alloc skb!\n");
845 return 0;
846 }
847
848 req = (struct cpl_rx_data_ack *) skb_put(skb, wrlen);
849 memset(req, 0, wrlen);
850 INIT_TP_WR(req, ep->hwtid);
851 OPCODE_TID(req) = cpu_to_be32(MK_OPCODE_TID(CPL_RX_DATA_ACK,
852 ep->hwtid));
ba6d3925
SW		 853 req->credit_dack = cpu_to_be32(credits | RX_FORCE_ACK(1) |
854 F_RX_DACK_CHANGE |
855 V_RX_DACK_MODE(dack_mode));
cfdda9d7
SW		 856 set_wr_txq(skb, CPL_PRIORITY_ACK, ep->txq_idx);
857 c4iw_ofld_send(&ep->com.dev->rdev, skb);
858 return credits;
859}
860
861static void process_mpa_reply(struct c4iw_ep *ep, struct sk_buff *skb)
862{
863 struct mpa_message *mpa;
864 u16 plen;
865 struct c4iw_qp_attributes attrs;
866 enum c4iw_qp_attr_mask mask;
867 int err;
868
869 PDBG("%s ep %p tid %u\n", __func__, ep, ep->hwtid);
870
871 /*
872 * Stop mpa timer. If it expired, then the state has
873 * changed and we bail since ep_timeout already aborted
874 * the connection.
875 */
876 stop_ep_timer(ep);
877 if (state_read(&ep->com) != MPA_REQ_SENT)
878 return;
879
880 /*
881 * If we get more than the supported amount of private data
882 * then we must fail this connection.
883 */
884 if (ep->mpa_pkt_len + skb->len > sizeof(ep->mpa_pkt)) {
885 err = -EINVAL;
886 goto err;
887 }
888
889 /*
890 * copy the new data into our accumulation buffer.
891 */
892 skb_copy_from_linear_data(skb, &(ep->mpa_pkt[ep->mpa_pkt_len]),
893 skb->len);
894 ep->mpa_pkt_len += skb->len;
895
896 /*
897 * if we don't even have the mpa message, then bail.
898 */
899 if (ep->mpa_pkt_len < sizeof(*mpa))
900 return;
901 mpa = (struct mpa_message *) ep->mpa_pkt;
902
903 /* Validate MPA header. */
904 if (mpa->revision != mpa_rev) {
905 err = -EPROTO;
906 goto err;
907 }
908 if (memcmp(mpa->key, MPA_KEY_REP, sizeof(mpa->key))) {
909 err = -EPROTO;
910 goto err;
911 }
912
913 plen = ntohs(mpa->private_data_size);
914
915 /*
916 * Fail if there's too much private data.
917 */
918 if (plen > MPA_MAX_PRIVATE_DATA) {
919 err = -EPROTO;
920 goto err;
921 }
922
923 /*
924 * If plen does not account for pkt size
925 */
926 if (ep->mpa_pkt_len > (sizeof(*mpa) + plen)) {
927 err = -EPROTO;
928 goto err;
929 }
930
931 ep->plen = (u8) plen;
932
933 /*
934 * If we don't have all the pdata yet, then bail.
935 * We'll continue process when more data arrives.
936 */
937 if (ep->mpa_pkt_len < (sizeof(*mpa) + plen))
938 return;
939
940 if (mpa->flags & MPA_REJECT) {
941 err = -ECONNREFUSED;
942 goto err;
943 }
944
945 /*
946 * If we get here we have accumulated the entire mpa
947 * start reply message including private data. And
948 * the MPA header is valid.
949 */
950 state_set(&ep->com, FPDU_MODE);
951 ep->mpa_attr.crc_enabled = (mpa->flags & MPA_CRC) | crc_enabled ? 1 : 0;
952 ep->mpa_attr.recv_marker_enabled = markers_enabled;
953 ep->mpa_attr.xmit_marker_enabled = mpa->flags & MPA_MARKERS ? 1 : 0;
954 ep->mpa_attr.version = mpa_rev;
955 ep->mpa_attr.p2p_type = peer2peer ? p2p_type :
956 FW_RI_INIT_P2PTYPE_DISABLED;
957 PDBG("%s - crc_enabled=%d, recv_marker_enabled=%d, "
958 "xmit_marker_enabled=%d, version=%d\n", __func__,
959 ep->mpa_attr.crc_enabled, ep->mpa_attr.recv_marker_enabled,
960 ep->mpa_attr.xmit_marker_enabled, ep->mpa_attr.version);
961
962 attrs.mpa_attr = ep->mpa_attr;
963 attrs.max_ird = ep->ird;
964 attrs.max_ord = ep->ord;
965 attrs.llp_stream_handle = ep;
966 attrs.next_state = C4IW_QP_STATE_RTS;
967
968 mask = C4IW_QP_ATTR_NEXT_STATE |
969 C4IW_QP_ATTR_LLP_STREAM_HANDLE | C4IW_QP_ATTR_MPA_ATTR |
970 C4IW_QP_ATTR_MAX_IRD | C4IW_QP_ATTR_MAX_ORD;
971
972 /* bind QP and TID with INIT_WR */
973 err = c4iw_modify_qp(ep->com.qp->rhp,
974 ep->com.qp, mask, &attrs, 1);
975 if (err)
976 goto err;
977 goto out;
978err:
b21ef16a
SW		 979 state_set(&ep->com, ABORTING);
980 send_abort(ep, skb, GFP_KERNEL);
cfdda9d7
SW		 981out:
982 connect_reply_upcall(ep, err);
983 return;
984}
985
986static void process_mpa_request(struct c4iw_ep *ep, struct sk_buff *skb)
987{
988 struct mpa_message *mpa;
989 u16 plen;
990
991 PDBG("%s ep %p tid %u\n", __func__, ep, ep->hwtid);
992
993 if (state_read(&ep->com) != MPA_REQ_WAIT)
994 return;
995
996 /*
997 * If we get more than the supported amount of private data
998 * then we must fail this connection.
999 */
1000 if (ep->mpa_pkt_len + skb->len > sizeof(ep->mpa_pkt)) {
1001 stop_ep_timer(ep);
1002 abort_connection(ep, skb, GFP_KERNEL);
1003 return;
1004 }
1005
1006 PDBG("%s enter (%s line %u)\n", __func__, __FILE__, __LINE__);
1007
1008 /*
1009 * Copy the new data into our accumulation buffer.
1010 */
1011 skb_copy_from_linear_data(skb, &(ep->mpa_pkt[ep->mpa_pkt_len]),
1012 skb->len);
1013 ep->mpa_pkt_len += skb->len;
1014
1015 /*
1016 * If we don't even have the mpa message, then bail.
1017 * We'll continue process when more data arrives.
1018 */
1019 if (ep->mpa_pkt_len < sizeof(*mpa))
1020 return;
1021
1022 PDBG("%s enter (%s line %u)\n", __func__, __FILE__, __LINE__);
1023 stop_ep_timer(ep);
1024 mpa = (struct mpa_message *) ep->mpa_pkt;
1025
1026 /*
1027 * Validate MPA Header.
1028 */
1029 if (mpa->revision != mpa_rev) {
1030 abort_connection(ep, skb, GFP_KERNEL);
1031 return;
1032 }
1033
1034 if (memcmp(mpa->key, MPA_KEY_REQ, sizeof(mpa->key))) {
1035 abort_connection(ep, skb, GFP_KERNEL);
1036 return;
1037 }
1038
1039 plen = ntohs(mpa->private_data_size);
1040
1041 /*
1042 * Fail if there's too much private data.
1043 */
1044 if (plen > MPA_MAX_PRIVATE_DATA) {
1045 abort_connection(ep, skb, GFP_KERNEL);
1046 return;
1047 }
1048
1049 /*
1050 * If plen does not account for pkt size
1051 */
1052 if (ep->mpa_pkt_len > (sizeof(*mpa) + plen)) {
1053 abort_connection(ep, skb, GFP_KERNEL);
1054 return;
1055 }
1056 ep->plen = (u8) plen;
1057
1058 /*
1059 * If we don't have all the pdata yet, then bail.
1060 */
1061 if (ep->mpa_pkt_len < (sizeof(*mpa) + plen))
1062 return;
1063
1064 /*
1065 * If we get here we have accumulated the entire mpa
1066 * start reply message including private data.
1067 */
1068 ep->mpa_attr.initiator = 0;
1069 ep->mpa_attr.crc_enabled = (mpa->flags & MPA_CRC) | crc_enabled ? 1 : 0;
1070 ep->mpa_attr.recv_marker_enabled = markers_enabled;
1071 ep->mpa_attr.xmit_marker_enabled = mpa->flags & MPA_MARKERS ? 1 : 0;
1072 ep->mpa_attr.version = mpa_rev;
1073 ep->mpa_attr.p2p_type = peer2peer ? p2p_type :
1074 FW_RI_INIT_P2PTYPE_DISABLED;
1075 PDBG("%s - crc_enabled=%d, recv_marker_enabled=%d, "
1076 "xmit_marker_enabled=%d, version=%d p2p_type=%d\n", __func__,
1077 ep->mpa_attr.crc_enabled, ep->mpa_attr.recv_marker_enabled,
1078 ep->mpa_attr.xmit_marker_enabled, ep->mpa_attr.version,
1079 ep->mpa_attr.p2p_type);
1080
1081 state_set(&ep->com, MPA_REQ_RCVD);
1082
1083 /* drive upcall */
1084 connect_request_upcall(ep);
1085 return;
1086}
1087
1088static int rx_data(struct c4iw_dev *dev, struct sk_buff *skb)
1089{
1090 struct c4iw_ep *ep;
1091 struct cpl_rx_data *hdr = cplhdr(skb);
1092 unsigned int dlen = ntohs(hdr->len);
1093 unsigned int tid = GET_TID(hdr);
1094 struct tid_info *t = dev->rdev.lldi.tids;
1095
1096 ep = lookup_tid(t, tid);
1097 PDBG("%s ep %p tid %u dlen %u\n", __func__, ep, ep->hwtid, dlen);
1098 skb_pull(skb, sizeof(*hdr));
1099 skb_trim(skb, dlen);
1100
1101 ep->rcv_seq += dlen;
1102 BUG_ON(ep->rcv_seq != (ntohl(hdr->seq) + dlen));
1103
1104 /* update RX credits */
1105 update_rx_credits(ep, dlen);
1106
1107 switch (state_read(&ep->com)) {
1108 case MPA_REQ_SENT:
1109 process_mpa_reply(ep, skb);
1110 break;
1111 case MPA_REQ_WAIT:
1112 process_mpa_request(ep, skb);
1113 break;
1114 case MPA_REP_SENT:
1115 break;
1116 default:
1117 printk(KERN_ERR MOD "%s Unexpected streaming data."
1118 " ep %p state %d tid %u\n",
1119 __func__, ep, state_read(&ep->com), ep->hwtid);
1120
1121 /*
1122 * The ep will timeout and inform the ULP of the failure.
1123 * See ep_timeout().
1124 */
1125 break;
1126 }
1127 return 0;
1128}
1129
1130static int abort_rpl(struct c4iw_dev *dev, struct sk_buff *skb)
1131{
1132 struct c4iw_ep *ep;
1133 struct cpl_abort_rpl_rss *rpl = cplhdr(skb);
1134 unsigned long flags;
1135 int release = 0;
1136 unsigned int tid = GET_TID(rpl);
1137 struct tid_info *t = dev->rdev.lldi.tids;
1138
1139 ep = lookup_tid(t, tid);
1140 PDBG("%s ep %p tid %u\n", __func__, ep, ep->hwtid);
1141 BUG_ON(!ep);
1142 spin_lock_irqsave(&ep->com.lock, flags);
1143 switch (ep->com.state) {
1144 case ABORTING:
1145 __state_set(&ep->com, DEAD);
1146 release = 1;
1147 break;
1148 default:
1149 printk(KERN_ERR "%s ep %p state %d\n",
1150 __func__, ep, ep->com.state);
1151 break;
1152 }
1153 spin_unlock_irqrestore(&ep->com.lock, flags);
1154
1155 if (release)
1156 release_ep_resources(ep);
1157 return 0;
1158}
1159
1160/*
1161 * Return whether a failed active open has allocated a TID
1162 */
1163static inline int act_open_has_tid(int status)
1164{
1165 return status != CPL_ERR_TCAM_FULL && status != CPL_ERR_CONN_EXIST &&
1166 status != CPL_ERR_ARP_MISS;
1167}
1168
1169static int act_open_rpl(struct c4iw_dev *dev, struct sk_buff *skb)
1170{
1171 struct c4iw_ep *ep;
1172 struct cpl_act_open_rpl *rpl = cplhdr(skb);
1173 unsigned int atid = GET_TID_TID(GET_AOPEN_ATID(
1174 ntohl(rpl->atid_status)));
1175 struct tid_info *t = dev->rdev.lldi.tids;
1176 int status = GET_AOPEN_STATUS(ntohl(rpl->atid_status));
1177
1178 ep = lookup_atid(t, atid);
1179
1180 PDBG("%s ep %p atid %u status %u errno %d\n", __func__, ep, atid,
1181 status, status2errno(status));
1182
1183 if (status == CPL_ERR_RTX_NEG_ADVICE) {
1184 printk(KERN_WARNING MOD "Connection problems for atid %u\n",
1185 atid);
1186 return 0;
1187 }
1188
1189 connect_reply_upcall(ep, status2errno(status));
1190 state_set(&ep->com, DEAD);
1191
1192 if (status && act_open_has_tid(status))
1193 cxgb4_remove_tid(ep->com.dev->rdev.lldi.tids, 0, GET_TID(rpl));
1194
1195 cxgb4_free_atid(t, atid);
1196 dst_release(ep->dst);
1197 cxgb4_l2t_release(ep->l2t);
1198 c4iw_put_ep(&ep->com);
1199
1200 return 0;
1201}
1202
1203static int pass_open_rpl(struct c4iw_dev *dev, struct sk_buff *skb)
1204{
1205 struct cpl_pass_open_rpl *rpl = cplhdr(skb);
1206 struct tid_info *t = dev->rdev.lldi.tids;
1207 unsigned int stid = GET_TID(rpl);
1208 struct c4iw_listen_ep *ep = lookup_stid(t, stid);
1209
1210 if (!ep) {
1211 printk(KERN_ERR MOD "stid %d lookup failure!\n", stid);
1212 return 0;
1213 }
1214 PDBG("%s ep %p status %d error %d\n", __func__, ep,
1215 rpl->status, status2errno(rpl->status));
1216 ep->com.rpl_err = status2errno(rpl->status);
1217 ep->com.rpl_done = 1;
1218 wake_up(&ep->com.waitq);
1219
1220 return 0;
1221}
1222
1223static int listen_stop(struct c4iw_listen_ep *ep)
1224{
1225 struct sk_buff *skb;
1226 struct cpl_close_listsvr_req *req;
1227
1228 PDBG("%s ep %p\n", __func__, ep);
1229 skb = get_skb(NULL, sizeof(*req), GFP_KERNEL);
1230 if (!skb) {
1231 printk(KERN_ERR MOD "%s - failed to alloc skb\n", __func__);
1232 return -ENOMEM;
1233 }
1234 req = (struct cpl_close_listsvr_req *) skb_put(skb, sizeof(*req));
1235 INIT_TP_WR(req, 0);
1236 OPCODE_TID(req) = cpu_to_be32(MK_OPCODE_TID(CPL_CLOSE_LISTSRV_REQ,
1237 ep->stid));
1238 req->reply_ctrl = cpu_to_be16(
1239 QUEUENO(ep->com.dev->rdev.lldi.rxq_ids[0]));
1240 set_wr_txq(skb, CPL_PRIORITY_SETUP, 0);
1241 return c4iw_ofld_send(&ep->com.dev->rdev, skb);
1242}
1243
1244static int close_listsrv_rpl(struct c4iw_dev *dev, struct sk_buff *skb)
1245{
1246 struct cpl_close_listsvr_rpl *rpl = cplhdr(skb);
1247 struct tid_info *t = dev->rdev.lldi.tids;
1248 unsigned int stid = GET_TID(rpl);
1249 struct c4iw_listen_ep *ep = lookup_stid(t, stid);
1250
1251 PDBG("%s ep %p\n", __func__, ep);
1252 ep->com.rpl_err = status2errno(rpl->status);
1253 ep->com.rpl_done = 1;
1254 wake_up(&ep->com.waitq);
1255 return 0;
1256}
1257
1258static void accept_cr(struct c4iw_ep *ep, __be32 peer_ip, struct sk_buff *skb,
1259 struct cpl_pass_accept_req *req)
1260{
1261 struct cpl_pass_accept_rpl *rpl;
1262 unsigned int mtu_idx;
1263 u64 opt0;
1264 u32 opt2;
1265 int wscale;
1266
1267 PDBG("%s ep %p tid %u\n", __func__, ep, ep->hwtid);
1268 BUG_ON(skb_cloned(skb));
1269 skb_trim(skb, sizeof(*rpl));
1270 skb_get(skb);
1271 cxgb4_best_mtu(ep->com.dev->rdev.lldi.mtus, ep->mtu, &mtu_idx);
1272 wscale = compute_wscale(rcv_win);
1273 opt0 = KEEP_ALIVE(1) |
ba6d3925 1274 DELACK(1) |
cfdda9d7
SW		 1275 WND_SCALE(wscale) |
1276 MSS_IDX(mtu_idx) |
1277 L2T_IDX(ep->l2t->idx) |
1278 TX_CHAN(ep->tx_chan) |
1279 SMAC_SEL(ep->smac_idx) |
1280 DSCP(ep->tos) |
1281 RCV_BUFSIZ(rcv_win>>10);
1282 opt2 = RX_CHANNEL(0) |
1283 RSS_QUEUE_VALID | RSS_QUEUE(ep->rss_qid);
1284
1285 if (enable_tcp_timestamps && req->tcpopt.tstamp)
1286 opt2 |= TSTAMPS_EN(1);
1287 if (enable_tcp_sack && req->tcpopt.sack)
1288 opt2 |= SACK_EN(1);
1289 if (wscale && enable_tcp_window_scaling)
1290 opt2 |= WND_SCALE_EN(1);
1291
1292 rpl = cplhdr(skb);
1293 INIT_TP_WR(rpl, ep->hwtid);
1294 OPCODE_TID(rpl) = cpu_to_be32(MK_OPCODE_TID(CPL_PASS_ACCEPT_RPL,
1295 ep->hwtid));
1296 rpl->opt0 = cpu_to_be64(opt0);
1297 rpl->opt2 = cpu_to_be32(opt2);
1298 set_wr_txq(skb, CPL_PRIORITY_SETUP, ep->txq_idx);
1299 c4iw_l2t_send(&ep->com.dev->rdev, skb, ep->l2t);
1300
1301 return;
1302}
1303
1304static void reject_cr(struct c4iw_dev *dev, u32 hwtid, __be32 peer_ip,
1305 struct sk_buff *skb)
1306{
1307 PDBG("%s c4iw_dev %p tid %u peer_ip %x\n", __func__, dev, hwtid,
1308 peer_ip);
1309 BUG_ON(skb_cloned(skb));
1310 skb_trim(skb, sizeof(struct cpl_tid_release));
1311 skb_get(skb);
1312 release_tid(&dev->rdev, hwtid, skb);
1313 return;
1314}
1315
1316static void get_4tuple(struct cpl_pass_accept_req *req,
1317 __be32 *local_ip, __be32 *peer_ip,
1318 __be16 *local_port, __be16 *peer_port)
1319{
1320 int eth_len = G_ETH_HDR_LEN(be32_to_cpu(req->hdr_len));
1321 int ip_len = G_IP_HDR_LEN(be32_to_cpu(req->hdr_len));
1322 struct iphdr *ip = (struct iphdr *)((u8 *)(req + 1) + eth_len);
1323 struct tcphdr *tcp = (struct tcphdr *)
1324 ((u8 *)(req + 1) + eth_len + ip_len);
1325
1326 PDBG("%s saddr 0x%x daddr 0x%x sport %u dport %u\n", __func__,
1327 ntohl(ip->saddr), ntohl(ip->daddr), ntohs(tcp->source),
1328 ntohs(tcp->dest));
1329
1330 *peer_ip = ip->saddr;
1331 *local_ip = ip->daddr;
1332 *peer_port = tcp->source;
1333 *local_port = tcp->dest;
1334
1335 return;
1336}
1337
1338static int pass_accept_req(struct c4iw_dev *dev, struct sk_buff *skb)
1339{
1340 struct c4iw_ep *child_ep, *parent_ep;
1341 struct cpl_pass_accept_req *req = cplhdr(skb);
1342 unsigned int stid = GET_POPEN_TID(ntohl(req->tos_stid));
1343 struct tid_info *t = dev->rdev.lldi.tids;
1344 unsigned int hwtid = GET_TID(req);
1345 struct dst_entry *dst;
1346 struct l2t_entry *l2t;
1347 struct rtable *rt;
1348 __be32 local_ip, peer_ip;
1349 __be16 local_port, peer_port;
1350 struct net_device *pdev;
1351 u32 tx_chan, smac_idx;
1352 u16 rss_qid;
1353 u32 mtu;
1354 int step;
1355 int txq_idx;
1356
1357 parent_ep = lookup_stid(t, stid);
1358 PDBG("%s parent ep %p tid %u\n", __func__, parent_ep, hwtid);
1359
1360 get_4tuple(req, &local_ip, &peer_ip, &local_port, &peer_port);
1361
1362 if (state_read(&parent_ep->com) != LISTEN) {
1363 printk(KERN_ERR "%s - listening ep not in LISTEN\n",
1364 __func__);
1365 goto reject;
1366 }
1367
1368 /* Find output route */
1369 rt = find_route(dev, local_ip, peer_ip, local_port, peer_port,
1370 GET_POPEN_TOS(ntohl(req->tos_stid)));
1371 if (!rt) {
1372 printk(KERN_ERR MOD "%s - failed to find dst entry!\n",
1373 __func__);
1374 goto reject;
1375 }
1376 dst = &rt->u.dst;
1377 if (dst->neighbour->dev->flags & IFF_LOOPBACK) {
1378 pdev = ip_dev_find(&init_net, peer_ip);
1379 BUG_ON(!pdev);
1380 l2t = cxgb4_l2t_get(dev->rdev.lldi.l2t, dst->neighbour,
1381 pdev, 0);
1382 mtu = pdev->mtu;
1383 tx_chan = cxgb4_port_chan(pdev);
2c5934bf 1384 smac_idx = (cxgb4_port_viid(pdev) & 0x7F) << 1;
cfdda9d7
SW		 1385 step = dev->rdev.lldi.ntxq / dev->rdev.lldi.nchan;
1386 txq_idx = cxgb4_port_idx(pdev) * step;
1387 step = dev->rdev.lldi.nrxq / dev->rdev.lldi.nchan;
1388 rss_qid = dev->rdev.lldi.rxq_ids[cxgb4_port_idx(pdev) * step];
1389 dev_put(pdev);
1390 } else {
1391 l2t = cxgb4_l2t_get(dev->rdev.lldi.l2t, dst->neighbour,
1392 dst->neighbour->dev, 0);
1393 mtu = dst_mtu(dst);
1394 tx_chan = cxgb4_port_chan(dst->neighbour->dev);
2c5934bf 1395 smac_idx = (cxgb4_port_viid(dst->neighbour->dev) & 0x7F) << 1;
cfdda9d7
SW		 1396 step = dev->rdev.lldi.ntxq / dev->rdev.lldi.nchan;
1397 txq_idx = cxgb4_port_idx(dst->neighbour->dev) * step;
1398 step = dev->rdev.lldi.nrxq / dev->rdev.lldi.nchan;
1399 rss_qid = dev->rdev.lldi.rxq_ids[
1400 cxgb4_port_idx(dst->neighbour->dev) * step];
1401 }
1402 if (!l2t) {
1403 printk(KERN_ERR MOD "%s - failed to allocate l2t entry!\n",
1404 __func__);
1405 dst_release(dst);
1406 goto reject;
1407 }
1408
1409 child_ep = alloc_ep(sizeof(*child_ep), GFP_KERNEL);
1410 if (!child_ep) {
1411 printk(KERN_ERR MOD "%s - failed to allocate ep entry!\n",
1412 __func__);
1413 cxgb4_l2t_release(l2t);
1414 dst_release(dst);
1415 goto reject;
1416 }
1417 state_set(&child_ep->com, CONNECTING);
1418 child_ep->com.dev = dev;
1419 child_ep->com.cm_id = NULL;
1420 child_ep->com.local_addr.sin_family = PF_INET;
1421 child_ep->com.local_addr.sin_port = local_port;
1422 child_ep->com.local_addr.sin_addr.s_addr = local_ip;
1423 child_ep->com.remote_addr.sin_family = PF_INET;
1424 child_ep->com.remote_addr.sin_port = peer_port;
1425 child_ep->com.remote_addr.sin_addr.s_addr = peer_ip;
1426 c4iw_get_ep(&parent_ep->com);
1427 child_ep->parent_ep = parent_ep;
1428 child_ep->tos = GET_POPEN_TOS(ntohl(req->tos_stid));
1429 child_ep->l2t = l2t;
1430 child_ep->dst = dst;
1431 child_ep->hwtid = hwtid;
1432 child_ep->tx_chan = tx_chan;
1433 child_ep->smac_idx = smac_idx;
1434 child_ep->rss_qid = rss_qid;
1435 child_ep->mtu = mtu;
1436 child_ep->txq_idx = txq_idx;
1437
1438 PDBG("%s tx_chan %u smac_idx %u rss_qid %u\n", __func__,
1439 tx_chan, smac_idx, rss_qid);
1440
1441 init_timer(&child_ep->timer);
1442 cxgb4_insert_tid(t, child_ep, hwtid);
1443 accept_cr(child_ep, peer_ip, skb, req);
1444 goto out;
1445reject:
1446 reject_cr(dev, hwtid, peer_ip, skb);
1447out:
1448 return 0;
1449}
1450
1451static int pass_establish(struct c4iw_dev *dev, struct sk_buff *skb)
1452{
1453 struct c4iw_ep *ep;
1454 struct cpl_pass_establish *req = cplhdr(skb);
1455 struct tid_info *t = dev->rdev.lldi.tids;
1456 unsigned int tid = GET_TID(req);
1457
1458 ep = lookup_tid(t, tid);
1459 PDBG("%s ep %p tid %u\n", __func__, ep, ep->hwtid);
1460 ep->snd_seq = be32_to_cpu(req->snd_isn);
1461 ep->rcv_seq = be32_to_cpu(req->rcv_isn);
1462
1463 set_emss(ep, ntohs(req->tcp_opt));
1464
1465 dst_confirm(ep->dst);
1466 state_set(&ep->com, MPA_REQ_WAIT);
1467 start_ep_timer(ep);
1468 send_flowc(ep, skb);
1469
1470 return 0;
1471}
1472
1473static int peer_close(struct c4iw_dev *dev, struct sk_buff *skb)
1474{
1475 struct cpl_peer_close *hdr = cplhdr(skb);
1476 struct c4iw_ep *ep;
1477 struct c4iw_qp_attributes attrs;
1478 unsigned long flags;
1479 int disconnect = 1;
1480 int release = 0;
1481 int closing = 0;
1482 struct tid_info *t = dev->rdev.lldi.tids;
1483 unsigned int tid = GET_TID(hdr);
1484 int start_timer = 0;
1485 int stop_timer = 0;
1486
1487 ep = lookup_tid(t, tid);
1488 PDBG("%s ep %p tid %u\n", __func__, ep, ep->hwtid);
1489 dst_confirm(ep->dst);
1490
1491 spin_lock_irqsave(&ep->com.lock, flags);
1492 switch (ep->com.state) {
1493 case MPA_REQ_WAIT:
1494 __state_set(&ep->com, CLOSING);
1495 break;
1496 case MPA_REQ_SENT:
1497 __state_set(&ep->com, CLOSING);
1498 connect_reply_upcall(ep, -ECONNRESET);
1499 break;
1500 case MPA_REQ_RCVD:
1501
1502 /*
1503 * We're gonna mark this puppy DEAD, but keep
1504 * the reference on it until the ULP accepts or
1505 * rejects the CR. Also wake up anyone waiting
1506 * in rdma connection migration (see c4iw_accept_cr()).
1507 */
1508 __state_set(&ep->com, CLOSING);
1509 ep->com.rpl_done = 1;
1510 ep->com.rpl_err = -ECONNRESET;
1511 PDBG("waking up ep %p tid %u\n", ep, ep->hwtid);
1512 wake_up(&ep->com.waitq);
1513 break;
1514 case MPA_REP_SENT:
1515 __state_set(&ep->com, CLOSING);
1516 ep->com.rpl_done = 1;
1517 ep->com.rpl_err = -ECONNRESET;
1518 PDBG("waking up ep %p tid %u\n", ep, ep->hwtid);
1519 wake_up(&ep->com.waitq);
1520 break;
1521 case FPDU_MODE:
1522 start_timer = 1;
1523 __state_set(&ep->com, CLOSING);
1524 closing = 1;
1525 peer_close_upcall(ep);
1526 break;
1527 case ABORTING:
1528 disconnect = 0;
1529 break;
1530 case CLOSING:
1531 __state_set(&ep->com, MORIBUND);
1532 disconnect = 0;
1533 break;
1534 case MORIBUND:
1535 stop_timer = 1;
1536 if (ep->com.cm_id && ep->com.qp) {
1537 attrs.next_state = C4IW_QP_STATE_IDLE;
1538 c4iw_modify_qp(ep->com.qp->rhp, ep->com.qp,
1539 C4IW_QP_ATTR_NEXT_STATE, &attrs, 1);
1540 }
1541 close_complete_upcall(ep);
1542 __state_set(&ep->com, DEAD);
1543 release = 1;
1544 disconnect = 0;
1545 break;
1546 case DEAD:
1547 disconnect = 0;
1548 break;
1549 default:
1550 BUG_ON(1);
1551 }
1552 spin_unlock_irqrestore(&ep->com.lock, flags);
1553 if (closing) {
1554 attrs.next_state = C4IW_QP_STATE_CLOSING;
1555 c4iw_modify_qp(ep->com.qp->rhp, ep->com.qp,
1556 C4IW_QP_ATTR_NEXT_STATE, &attrs, 1);
1557 }
1558 if (start_timer)
1559 start_ep_timer(ep);
1560 if (stop_timer)
1561 stop_ep_timer(ep);
1562 if (disconnect)
1563 c4iw_ep_disconnect(ep, 0, GFP_KERNEL);
1564 if (release)
1565 release_ep_resources(ep);
1566 return 0;
1567}
1568
1569/*
1570 * Returns whether an ABORT_REQ_RSS message is a negative advice.
1571 */
1572static int is_neg_adv_abort(unsigned int status)
1573{
1574 return status == CPL_ERR_RTX_NEG_ADVICE ||
1575 status == CPL_ERR_PERSIST_NEG_ADVICE;
1576}
1577
1578static int peer_abort(struct c4iw_dev *dev, struct sk_buff *skb)
1579{
1580 struct cpl_abort_req_rss *req = cplhdr(skb);
1581 struct c4iw_ep *ep;
1582 struct cpl_abort_rpl *rpl;
1583 struct sk_buff *rpl_skb;
1584 struct c4iw_qp_attributes attrs;
1585 int ret;
1586 int release = 0;
1587 unsigned long flags;
1588 struct tid_info *t = dev->rdev.lldi.tids;
1589 unsigned int tid = GET_TID(req);
1590 int stop_timer = 0;
1591
1592 ep = lookup_tid(t, tid);
1593 if (is_neg_adv_abort(req->status)) {
1594 PDBG("%s neg_adv_abort ep %p tid %u\n", __func__, ep,
1595 ep->hwtid);
1596 return 0;
1597 }
1598 spin_lock_irqsave(&ep->com.lock, flags);
1599 PDBG("%s ep %p tid %u state %u\n", __func__, ep, ep->hwtid,
1600 ep->com.state);
1601 switch (ep->com.state) {
1602 case CONNECTING:
1603 break;
1604 case MPA_REQ_WAIT:
1605 stop_timer = 1;
1606 break;
1607 case MPA_REQ_SENT:
1608 stop_timer = 1;
1609 connect_reply_upcall(ep, -ECONNRESET);
1610 break;
1611 case MPA_REP_SENT:
1612 ep->com.rpl_done = 1;
1613 ep->com.rpl_err = -ECONNRESET;
1614 PDBG("waking up ep %p\n", ep);
1615 wake_up(&ep->com.waitq);
1616 break;
1617 case MPA_REQ_RCVD:
1618
1619 /*
1620 * We're gonna mark this puppy DEAD, but keep
1621 * the reference on it until the ULP accepts or
1622 * rejects the CR. Also wake up anyone waiting
1623 * in rdma connection migration (see c4iw_accept_cr()).
1624 */
1625 ep->com.rpl_done = 1;
1626 ep->com.rpl_err = -ECONNRESET;
1627 PDBG("waking up ep %p tid %u\n", ep, ep->hwtid);
1628 wake_up(&ep->com.waitq);
1629 break;
1630 case MORIBUND:
1631 case CLOSING:
1632 stop_timer = 1;
1633 /*FALLTHROUGH*/
1634 case FPDU_MODE:
1635 if (ep->com.cm_id && ep->com.qp) {
1636 attrs.next_state = C4IW_QP_STATE_ERROR;
1637 ret = c4iw_modify_qp(ep->com.qp->rhp,
1638 ep->com.qp, C4IW_QP_ATTR_NEXT_STATE,
1639 &attrs, 1);
1640 if (ret)
1641 printk(KERN_ERR MOD
1642 "%s - qp <- error failed!\n",
1643 __func__);
1644 }
1645 peer_abort_upcall(ep);
1646 break;
1647 case ABORTING:
1648 break;
1649 case DEAD:
1650 PDBG("%s PEER_ABORT IN DEAD STATE!!!!\n", __func__);
1651 spin_unlock_irqrestore(&ep->com.lock, flags);
1652 return 0;
1653 default:
1654 BUG_ON(1);
1655 break;
1656 }
1657 dst_confirm(ep->dst);
1658 if (ep->com.state != ABORTING) {
1659 __state_set(&ep->com, DEAD);
1660 release = 1;
1661 }
1662 spin_unlock_irqrestore(&ep->com.lock, flags);
1663
1664 rpl_skb = get_skb(skb, sizeof(*rpl), GFP_KERNEL);
1665 if (!rpl_skb) {
1666 printk(KERN_ERR MOD "%s - cannot allocate skb!\n",
1667 __func__);
1668 release = 1;
1669 goto out;
1670 }
1671 set_wr_txq(skb, CPL_PRIORITY_DATA, ep->txq_idx);
1672 rpl = (struct cpl_abort_rpl *) skb_put(rpl_skb, sizeof(*rpl));
1673 INIT_TP_WR(rpl, ep->hwtid);
1674 OPCODE_TID(rpl) = cpu_to_be32(MK_OPCODE_TID(CPL_ABORT_RPL, ep->hwtid));
1675 rpl->cmd = CPL_ABORT_NO_RST;
1676 c4iw_ofld_send(&ep->com.dev->rdev, rpl_skb);
1677out:
1678 if (stop_timer)
1679 stop_ep_timer(ep);
1680 if (release)
1681 release_ep_resources(ep);
1682 return 0;
1683}
1684
1685static int close_con_rpl(struct c4iw_dev *dev, struct sk_buff *skb)
1686{
1687 struct c4iw_ep *ep;
1688 struct c4iw_qp_attributes attrs;
1689 struct cpl_close_con_rpl *rpl = cplhdr(skb);
1690 unsigned long flags;
1691 int release = 0;
1692 struct tid_info *t = dev->rdev.lldi.tids;
1693 unsigned int tid = GET_TID(rpl);
1694 int stop_timer = 0;
1695
1696 ep = lookup_tid(t, tid);
1697
1698 PDBG("%s ep %p tid %u\n", __func__, ep, ep->hwtid);
1699 BUG_ON(!ep);
1700
1701 /* The cm_id may be null if we failed to connect */
1702 spin_lock_irqsave(&ep->com.lock, flags);
1703 switch (ep->com.state) {
1704 case CLOSING:
1705 __state_set(&ep->com, MORIBUND);
1706 break;
1707 case MORIBUND:
1708 stop_timer = 1;
1709 if ((ep->com.cm_id) && (ep->com.qp)) {
1710 attrs.next_state = C4IW_QP_STATE_IDLE;
1711 c4iw_modify_qp(ep->com.qp->rhp,
1712 ep->com.qp,
1713 C4IW_QP_ATTR_NEXT_STATE,
1714 &attrs, 1);
1715 }
1716 close_complete_upcall(ep);
1717 __state_set(&ep->com, DEAD);
1718 release = 1;
1719 break;
1720 case ABORTING:
1721 case DEAD:
1722 break;
1723 default:
1724 BUG_ON(1);
1725 break;
1726 }
1727 spin_unlock_irqrestore(&ep->com.lock, flags);
1728 if (stop_timer)
1729 stop_ep_timer(ep);
1730 if (release)
1731 release_ep_resources(ep);
1732 return 0;
1733}
1734
1735static int terminate(struct c4iw_dev *dev, struct sk_buff *skb)
1736{
1737 struct c4iw_ep *ep;
1738 struct cpl_rdma_terminate *term = cplhdr(skb);
1739 struct tid_info *t = dev->rdev.lldi.tids;
1740 unsigned int tid = GET_TID(term);
1741
1742 ep = lookup_tid(t, tid);
1743
1744 if (state_read(&ep->com) != FPDU_MODE)
1745 return 0;
1746
1747 PDBG("%s ep %p tid %u\n", __func__, ep, ep->hwtid);
1748 skb_pull(skb, sizeof *term);
1749 PDBG("%s saving %d bytes of term msg\n", __func__, skb->len);
1750 skb_copy_from_linear_data(skb, ep->com.qp->attr.terminate_buffer,
1751 skb->len);
1752 ep->com.qp->attr.terminate_msg_len = skb->len;
1753 ep->com.qp->attr.is_terminate_local = 0;
1754 return 0;
1755}
1756
1757/*
1758 * Upcall from the adapter indicating data has been transmitted.
1759 * For us its just the single MPA request or reply. We can now free
1760 * the skb holding the mpa message.
1761 */
1762static int fw4_ack(struct c4iw_dev *dev, struct sk_buff *skb)
1763{
1764 struct c4iw_ep *ep;
1765 struct cpl_fw4_ack *hdr = cplhdr(skb);
1766 u8 credits = hdr->credits;
1767 unsigned int tid = GET_TID(hdr);
1768 struct tid_info *t = dev->rdev.lldi.tids;
1769
1770
1771 ep = lookup_tid(t, tid);
1772 PDBG("%s ep %p tid %u credits %u\n", __func__, ep, ep->hwtid, credits);
1773 if (credits == 0) {
1774 PDBG(KERN_ERR "%s 0 credit ack ep %p tid %u state %u\n",
1775 __func__, ep, ep->hwtid, state_read(&ep->com));
1776 return 0;
1777 }
1778
1779 dst_confirm(ep->dst);
1780 if (ep->mpa_skb) {
1781 PDBG("%s last streaming msg ack ep %p tid %u state %u "
1782 "initiator %u freeing skb\n", __func__, ep, ep->hwtid,
1783 state_read(&ep->com), ep->mpa_attr.initiator ? 1 : 0);
1784 kfree_skb(ep->mpa_skb);
1785 ep->mpa_skb = NULL;
1786 }
1787 return 0;
1788}
1789
cfdda9d7
SW		 1790int c4iw_reject_cr(struct iw_cm_id *cm_id, const void *pdata, u8 pdata_len)
1791{
1792 int err;
1793 struct c4iw_ep *ep = to_ep(cm_id);
1794 PDBG("%s ep %p tid %u\n", __func__, ep, ep->hwtid);
1795
1796 if (state_read(&ep->com) == DEAD) {
1797 c4iw_put_ep(&ep->com);
1798 return -ECONNRESET;
1799 }
1800 BUG_ON(state_read(&ep->com) != MPA_REQ_RCVD);
1801 if (mpa_rev == 0)
1802 abort_connection(ep, NULL, GFP_KERNEL);
1803 else {
1804 err = send_mpa_reject(ep, pdata, pdata_len);
1805 err = c4iw_ep_disconnect(ep, 0, GFP_KERNEL);
1806 }
1807 c4iw_put_ep(&ep->com);
1808 return 0;
1809}
1810
1811int c4iw_accept_cr(struct iw_cm_id *cm_id, struct iw_cm_conn_param *conn_param)
1812{
1813 int err;
1814 struct c4iw_qp_attributes attrs;
1815 enum c4iw_qp_attr_mask mask;
1816 struct c4iw_ep *ep = to_ep(cm_id);
1817 struct c4iw_dev *h = to_c4iw_dev(cm_id->device);
1818 struct c4iw_qp *qp = get_qhp(h, conn_param->qpn);
1819
1820 PDBG("%s ep %p tid %u\n", __func__, ep, ep->hwtid);
1821 if (state_read(&ep->com) == DEAD) {
1822 err = -ECONNRESET;
1823 goto err;
1824 }
1825
1826 BUG_ON(state_read(&ep->com) != MPA_REQ_RCVD);
1827 BUG_ON(!qp);
1828
be4c9bad
RD		 1829 if ((conn_param->ord > c4iw_max_read_depth) ||
1830 (conn_param->ird > c4iw_max_read_depth)) {
cfdda9d7
SW		 1831 abort_connection(ep, NULL, GFP_KERNEL);
1832 err = -EINVAL;
1833 goto err;
1834 }
1835
1836 cm_id->add_ref(cm_id);
1837 ep->com.cm_id = cm_id;
1838 ep->com.qp = qp;
1839
1840 ep->ird = conn_param->ird;
1841 ep->ord = conn_param->ord;
1842
1843 if (peer2peer && ep->ird == 0)
1844 ep->ird = 1;
1845
1846 PDBG("%s %d ird %d ord %d\n", __func__, __LINE__, ep->ird, ep->ord);
1847
1848 /* bind QP to EP and move to RTS */
1849 attrs.mpa_attr = ep->mpa_attr;
1850 attrs.max_ird = ep->ird;
1851 attrs.max_ord = ep->ord;
1852 attrs.llp_stream_handle = ep;
1853 attrs.next_state = C4IW_QP_STATE_RTS;
1854
1855 /* bind QP and TID with INIT_WR */
1856 mask = C4IW_QP_ATTR_NEXT_STATE |
1857 C4IW_QP_ATTR_LLP_STREAM_HANDLE |
1858 C4IW_QP_ATTR_MPA_ATTR |
1859 C4IW_QP_ATTR_MAX_IRD |
1860 C4IW_QP_ATTR_MAX_ORD;
1861
1862 err = c4iw_modify_qp(ep->com.qp->rhp,
1863 ep->com.qp, mask, &attrs, 1);
1864 if (err)
1865 goto err1;
1866 err = send_mpa_reply(ep, conn_param->private_data,
1867 conn_param->private_data_len);
1868 if (err)
1869 goto err1;
1870
1871 state_set(&ep->com, FPDU_MODE);
1872 established_upcall(ep);
1873 c4iw_put_ep(&ep->com);
1874 return 0;
1875err1:
1876 ep->com.cm_id = NULL;
1877 ep->com.qp = NULL;
1878 cm_id->rem_ref(cm_id);
1879err:
1880 c4iw_put_ep(&ep->com);
1881 return err;
1882}
1883
1884int c4iw_connect(struct iw_cm_id *cm_id, struct iw_cm_conn_param *conn_param)
1885{
1886 int err = 0;
1887 struct c4iw_dev *dev = to_c4iw_dev(cm_id->device);
1888 struct c4iw_ep *ep;
1889 struct rtable *rt;
1890 struct net_device *pdev;
1891 int step;
1892
be4c9bad
RD		 1893 if ((conn_param->ord > c4iw_max_read_depth) ||
1894 (conn_param->ird > c4iw_max_read_depth)) {
1895 err = -EINVAL;
1896 goto out;
1897 }
cfdda9d7
SW		 1898 ep = alloc_ep(sizeof(*ep), GFP_KERNEL);
1899 if (!ep) {
1900 printk(KERN_ERR MOD "%s - cannot alloc ep.\n", __func__);
1901 err = -ENOMEM;
1902 goto out;
1903 }
1904 init_timer(&ep->timer);
1905 ep->plen = conn_param->private_data_len;
1906 if (ep->plen)
1907 memcpy(ep->mpa_pkt + sizeof(struct mpa_message),
1908 conn_param->private_data, ep->plen);
1909 ep->ird = conn_param->ird;
1910 ep->ord = conn_param->ord;
1911
1912 if (peer2peer && ep->ord == 0)
1913 ep->ord = 1;
1914
1915 cm_id->add_ref(cm_id);
1916 ep->com.dev = dev;
1917 ep->com.cm_id = cm_id;
1918 ep->com.qp = get_qhp(dev, conn_param->qpn);
1919 BUG_ON(!ep->com.qp);
1920 PDBG("%s qpn 0x%x qp %p cm_id %p\n", __func__, conn_param->qpn,
1921 ep->com.qp, cm_id);
1922
1923 /*
1924 * Allocate an active TID to initiate a TCP connection.
1925 */
1926 ep->atid = cxgb4_alloc_atid(dev->rdev.lldi.tids, ep);
1927 if (ep->atid == -1) {
1928 printk(KERN_ERR MOD "%s - cannot alloc atid.\n", __func__);
1929 err = -ENOMEM;
1930 goto fail2;
1931 }
1932
1933 PDBG("%s saddr 0x%x sport 0x%x raddr 0x%x rport 0x%x\n", __func__,
1934 ntohl(cm_id->local_addr.sin_addr.s_addr),
1935 ntohs(cm_id->local_addr.sin_port),
1936 ntohl(cm_id->remote_addr.sin_addr.s_addr),
1937 ntohs(cm_id->remote_addr.sin_port));
1938
1939 /* find a route */
1940 rt = find_route(dev,
1941 cm_id->local_addr.sin_addr.s_addr,
1942 cm_id->remote_addr.sin_addr.s_addr,
1943 cm_id->local_addr.sin_port,
1944 cm_id->remote_addr.sin_port, 0);
1945 if (!rt) {
1946 printk(KERN_ERR MOD "%s - cannot find route.\n", __func__);
1947 err = -EHOSTUNREACH;
1948 goto fail3;
1949 }
1950 ep->dst = &rt->u.dst;
1951
1952 /* get a l2t entry */
1953 if (ep->dst->neighbour->dev->flags & IFF_LOOPBACK) {
1954 PDBG("%s LOOPBACK\n", __func__);
1955 pdev = ip_dev_find(&init_net,
1956 cm_id->remote_addr.sin_addr.s_addr);
1957 ep->l2t = cxgb4_l2t_get(ep->com.dev->rdev.lldi.l2t,
1958 ep->dst->neighbour,
1959 pdev, 0);
1960 ep->mtu = pdev->mtu;
1961 ep->tx_chan = cxgb4_port_chan(pdev);
2c5934bf 1962 ep->smac_idx = (cxgb4_port_viid(pdev) & 0x7F) << 1;
cfdda9d7
SW		 1963 step = ep->com.dev->rdev.lldi.ntxq /
1964 ep->com.dev->rdev.lldi.nchan;
1965 ep->txq_idx = cxgb4_port_idx(pdev) * step;
1966 step = ep->com.dev->rdev.lldi.nrxq /
1967 ep->com.dev->rdev.lldi.nchan;
1968 ep->rss_qid = ep->com.dev->rdev.lldi.rxq_ids[
1969 cxgb4_port_idx(pdev) * step];
1970 dev_put(pdev);
1971 } else {
1972 ep->l2t = cxgb4_l2t_get(ep->com.dev->rdev.lldi.l2t,
1973 ep->dst->neighbour,
1974 ep->dst->neighbour->dev, 0);
1975 ep->mtu = dst_mtu(ep->dst);
1976 ep->tx_chan = cxgb4_port_chan(ep->dst->neighbour->dev);
2c5934bf
SW		 1977 ep->smac_idx = (cxgb4_port_viid(ep->dst->neighbour->dev) &
1978 0x7F) << 1;
cfdda9d7
SW		 1979 step = ep->com.dev->rdev.lldi.ntxq /
1980 ep->com.dev->rdev.lldi.nchan;
1981 ep->txq_idx = cxgb4_port_idx(ep->dst->neighbour->dev) * step;
1982 step = ep->com.dev->rdev.lldi.nrxq /
1983 ep->com.dev->rdev.lldi.nchan;
1984 ep->rss_qid = ep->com.dev->rdev.lldi.rxq_ids[
1985 cxgb4_port_idx(ep->dst->neighbour->dev) * step];
1986 }
1987 if (!ep->l2t) {
1988 printk(KERN_ERR MOD "%s - cannot alloc l2e.\n", __func__);
1989 err = -ENOMEM;
1990 goto fail4;
1991 }
1992
1993 PDBG("%s txq_idx %u tx_chan %u smac_idx %u rss_qid %u l2t_idx %u\n",
1994 __func__, ep->txq_idx, ep->tx_chan, ep->smac_idx, ep->rss_qid,
1995 ep->l2t->idx);
1996
1997 state_set(&ep->com, CONNECTING);
1998 ep->tos = 0;
1999 ep->com.local_addr = cm_id->local_addr;
2000 ep->com.remote_addr = cm_id->remote_addr;
2001
2002 /* send connect request to rnic */
2003 err = send_connect(ep);
2004 if (!err)
2005 goto out;
2006
2007 cxgb4_l2t_release(ep->l2t);
2008fail4:
2009 dst_release(ep->dst);
2010fail3:
2011 cxgb4_free_atid(ep->com.dev->rdev.lldi.tids, ep->atid);
2012fail2:
2013 cm_id->rem_ref(cm_id);
2014 c4iw_put_ep(&ep->com);
2015out:
2016 return err;
2017}
2018
2019int c4iw_create_listen(struct iw_cm_id *cm_id, int backlog)
2020{
2021 int err = 0;
2022 struct c4iw_dev *dev = to_c4iw_dev(cm_id->device);
2023 struct c4iw_listen_ep *ep;
2024
2025
2026 might_sleep();
2027
2028 ep = alloc_ep(sizeof(*ep), GFP_KERNEL);
2029 if (!ep) {
2030 printk(KERN_ERR MOD "%s - cannot alloc ep.\n", __func__);
2031 err = -ENOMEM;
2032 goto fail1;
2033 }
2034 PDBG("%s ep %p\n", __func__, ep);
2035 cm_id->add_ref(cm_id);
2036 ep->com.cm_id = cm_id;
2037 ep->com.dev = dev;
2038 ep->backlog = backlog;
2039 ep->com.local_addr = cm_id->local_addr;
2040
2041 /*
2042 * Allocate a server TID.
2043 */
2044 ep->stid = cxgb4_alloc_stid(dev->rdev.lldi.tids, PF_INET, ep);
2045 if (ep->stid == -1) {
be4c9bad 2046 printk(KERN_ERR MOD "%s - cannot alloc stid.\n", __func__);
cfdda9d7
SW		 2047 err = -ENOMEM;
2048 goto fail2;
2049 }
2050
2051 state_set(&ep->com, LISTEN);
2052 err = cxgb4_create_server(ep->com.dev->rdev.lldi.ports[0], ep->stid,
2053 ep->com.local_addr.sin_addr.s_addr,
2054 ep->com.local_addr.sin_port,
2055 ep->com.dev->rdev.lldi.rxq_ids[0]);
2056 if (err)
2057 goto fail3;
2058
2059 /* wait for pass_open_rpl */
2060 wait_event(ep->com.waitq, ep->com.rpl_done);
2061 err = ep->com.rpl_err;
2062 if (!err) {
2063 cm_id->provider_data = ep;
2064 goto out;
2065 }
2066fail3:
2067 cxgb4_free_stid(ep->com.dev->rdev.lldi.tids, ep->stid, PF_INET);
2068fail2:
2069 cm_id->rem_ref(cm_id);
2070 c4iw_put_ep(&ep->com);
2071fail1:
2072out:
2073 return err;
2074}
2075
2076int c4iw_destroy_listen(struct iw_cm_id *cm_id)
2077{
2078 int err;
2079 struct c4iw_listen_ep *ep = to_listen_ep(cm_id);
2080
2081 PDBG("%s ep %p\n", __func__, ep);
2082
2083 might_sleep();
2084 state_set(&ep->com, DEAD);
2085 ep->com.rpl_done = 0;
2086 ep->com.rpl_err = 0;
2087 err = listen_stop(ep);
2088 if (err)
2089 goto done;
2090 wait_event(ep->com.waitq, ep->com.rpl_done);
2091 cxgb4_free_stid(ep->com.dev->rdev.lldi.tids, ep->stid, PF_INET);
2092done:
2093 err = ep->com.rpl_err;
2094 cm_id->rem_ref(cm_id);
2095 c4iw_put_ep(&ep->com);
2096 return err;
2097}
2098
2099int c4iw_ep_disconnect(struct c4iw_ep *ep, int abrupt, gfp_t gfp)
2100{
2101 int ret = 0;
2102 unsigned long flags;
2103 int close = 0;
2104 int fatal = 0;
2105 struct c4iw_rdev *rdev;
2106 int start_timer = 0;
2107 int stop_timer = 0;
2108
2109 spin_lock_irqsave(&ep->com.lock, flags);
2110
2111 PDBG("%s ep %p state %s, abrupt %d\n", __func__, ep,
2112 states[ep->com.state], abrupt);
2113
2114 rdev = &ep->com.dev->rdev;
2115 if (c4iw_fatal_error(rdev)) {
2116 fatal = 1;
2117 close_complete_upcall(ep);
2118 ep->com.state = DEAD;
2119 }
2120 switch (ep->com.state) {
2121 case MPA_REQ_WAIT:
2122 case MPA_REQ_SENT:
2123 case MPA_REQ_RCVD:
2124 case MPA_REP_SENT:
2125 case FPDU_MODE:
2126 close = 1;
2127 if (abrupt)
2128 ep->com.state = ABORTING;
2129 else {
2130 ep->com.state = CLOSING;
2131 start_timer = 1;
2132 }
2133 set_bit(CLOSE_SENT, &ep->com.flags);
2134 break;
2135 case CLOSING:
2136 if (!test_and_set_bit(CLOSE_SENT, &ep->com.flags)) {
2137 close = 1;
2138 if (abrupt) {
2139 stop_timer = 1;
2140 ep->com.state = ABORTING;
2141 } else
2142 ep->com.state = MORIBUND;
2143 }
2144 break;
2145 case MORIBUND:
2146 case ABORTING:
2147 case DEAD:
2148 PDBG("%s ignoring disconnect ep %p state %u\n",
2149 __func__, ep, ep->com.state);
2150 break;
2151 default:
2152 BUG();
2153 break;
2154 }
2155
2156 spin_unlock_irqrestore(&ep->com.lock, flags);
2157 if (start_timer)
2158 start_ep_timer(ep);
2159 if (stop_timer)
2160 stop_ep_timer(ep);
2161 if (close) {
2162 if (abrupt)
2163 ret = abort_connection(ep, NULL, gfp);
2164 else
2165 ret = send_halfclose(ep, gfp);
2166 if (ret)
2167 fatal = 1;
2168 }
2169 if (fatal)
2170 release_ep_resources(ep);
2171 return ret;
2172}
2173
be4c9bad
RD		 2174/*
2175 * These are the real handlers that are called from a
2176 * work queue.
2177 */
2178static c4iw_handler_func work_handlers[NUM_CPL_CMDS] = {
2179 [CPL_ACT_ESTABLISH] = act_establish,
2180 [CPL_ACT_OPEN_RPL] = act_open_rpl,
2181 [CPL_RX_DATA] = rx_data,
2182 [CPL_ABORT_RPL_RSS] = abort_rpl,
2183 [CPL_ABORT_RPL] = abort_rpl,
2184 [CPL_PASS_OPEN_RPL] = pass_open_rpl,
2185 [CPL_CLOSE_LISTSRV_RPL] = close_listsrv_rpl,
2186 [CPL_PASS_ACCEPT_REQ] = pass_accept_req,
2187 [CPL_PASS_ESTABLISH] = pass_establish,
2188 [CPL_PEER_CLOSE] = peer_close,
2189 [CPL_ABORT_REQ_RSS] = peer_abort,
2190 [CPL_CLOSE_CON_RPL] = close_con_rpl,
2191 [CPL_RDMA_TERMINATE] = terminate,
2192 [CPL_FW4_ACK] = fw4_ack
2193};
2194
2195static void process_timeout(struct c4iw_ep *ep)
2196{
2197 struct c4iw_qp_attributes attrs;
2198 int abort = 1;
2199
2200 spin_lock_irq(&ep->com.lock);
2201 PDBG("%s ep %p tid %u state %d\n", __func__, ep, ep->hwtid,
2202 ep->com.state);
2203 switch (ep->com.state) {
2204 case MPA_REQ_SENT:
2205 __state_set(&ep->com, ABORTING);
2206 connect_reply_upcall(ep, -ETIMEDOUT);
2207 break;
2208 case MPA_REQ_WAIT:
2209 __state_set(&ep->com, ABORTING);
2210 break;
2211 case CLOSING:
2212 case MORIBUND:
2213 if (ep->com.cm_id && ep->com.qp) {
2214 attrs.next_state = C4IW_QP_STATE_ERROR;
2215 c4iw_modify_qp(ep->com.qp->rhp,
2216 ep->com.qp, C4IW_QP_ATTR_NEXT_STATE,
2217 &attrs, 1);
2218 }
2219 __state_set(&ep->com, ABORTING);
2220 break;
2221 default:
2222 printk(KERN_ERR "%s unexpected state ep %p tid %u state %u\n",
2223 __func__, ep, ep->hwtid, ep->com.state);
2224 WARN_ON(1);
2225 abort = 0;
2226 }
2227 spin_unlock_irq(&ep->com.lock);
2228 if (abort)
2229 abort_connection(ep, NULL, GFP_KERNEL);
2230 c4iw_put_ep(&ep->com);
2231}
2232
2233static void process_timedout_eps(void)
2234{
2235 struct c4iw_ep *ep;
2236
2237 spin_lock_irq(&timeout_lock);
2238 while (!list_empty(&timeout_list)) {
2239 struct list_head *tmp;
2240
2241 tmp = timeout_list.next;
2242 list_del(tmp);
2243 spin_unlock_irq(&timeout_lock);
2244 ep = list_entry(tmp, struct c4iw_ep, entry);
2245 process_timeout(ep);
2246 spin_lock_irq(&timeout_lock);
2247 }
2248 spin_unlock_irq(&timeout_lock);
2249}
2250
2251static void process_work(struct work_struct *work)
2252{
2253 struct sk_buff *skb = NULL;
2254 struct c4iw_dev *dev;
c1d7356c 2255 struct cpl_act_establish *rpl;
be4c9bad
RD		 2256 unsigned int opcode;
2257 int ret;
2258
2259 while ((skb = skb_dequeue(&rxq))) {
2260 rpl = cplhdr(skb);
2261 dev = *((struct c4iw_dev **) (skb->cb + sizeof(void *)));
2262 opcode = rpl->ot.opcode;
2263
2264 BUG_ON(!work_handlers[opcode]);
2265 ret = work_handlers[opcode](dev, skb);
2266 if (!ret)
2267 kfree_skb(skb);
2268 }
2269 process_timedout_eps();
2270}
2271
2272static DECLARE_WORK(skb_work, process_work);
2273
2274static void ep_timeout(unsigned long arg)
2275{
2276 struct c4iw_ep *ep = (struct c4iw_ep *)arg;
2277
2278 spin_lock(&timeout_lock);
2279 list_add_tail(&ep->entry, &timeout_list);
2280 spin_unlock(&timeout_lock);
2281 queue_work(workq, &skb_work);
2282}
2283
cfdda9d7
SW		 2284/*
2285 * All the CM events are handled on a work queue to have a safe context.
2286 */
2287static int sched(struct c4iw_dev *dev, struct sk_buff *skb)
2288{
2289
2290 /*
2291 * Save dev in the skb->cb area.
2292 */
2293 *((struct c4iw_dev **) (skb->cb + sizeof(void *))) = dev;
2294
2295 /*
2296 * Queue the skb and schedule the worker thread.
2297 */
2298 skb_queue_tail(&rxq, skb);
2299 queue_work(workq, &skb_work);
2300 return 0;
2301}
2302
2303static int set_tcb_rpl(struct c4iw_dev *dev, struct sk_buff *skb)
2304{
2305 struct cpl_set_tcb_rpl *rpl = cplhdr(skb);
2306
2307 if (rpl->status != CPL_ERR_NONE) {
2308 printk(KERN_ERR MOD "Unexpected SET_TCB_RPL status %u "
2309 "for tid %u\n", rpl->status, GET_TID(rpl));
2310 }
2311 return 0;
2312}
2313
be4c9bad
RD		 2314static int fw6_msg(struct c4iw_dev *dev, struct sk_buff *skb)
2315{
2316 struct cpl_fw6_msg *rpl = cplhdr(skb);
2317 struct c4iw_wr_wait *wr_waitp;
2318 int ret;
2319
2320 PDBG("%s type %u\n", __func__, rpl->type);
2321
2322 switch (rpl->type) {
2323 case 1:
2324 ret = (int)((be64_to_cpu(rpl->data[0]) >> 8) & 0xff);
2325 wr_waitp = (__force struct c4iw_wr_wait *)rpl->data[1];
2326 PDBG("%s wr_waitp %p ret %u\n", __func__, wr_waitp, ret);
2327 if (wr_waitp) {
2328 wr_waitp->ret = ret;
2329 wr_waitp->done = 1;
2330 wake_up(&wr_waitp->wait);
2331 }
2332 break;
2333 case 2:
2334 c4iw_ev_dispatch(dev, (struct t4_cqe *)&rpl->data[0]);
2335 break;
2336 default:
2337 printk(KERN_ERR MOD "%s unexpected fw6 msg type %u\n", __func__,
2338 rpl->type);
2339 break;
2340 }
2341 return 0;
2342}
2343
2344/*
2345 * Most upcalls from the T4 Core go to sched() to
2346 * schedule the processing on a work queue.
2347 */
2348c4iw_handler_func c4iw_handlers[NUM_CPL_CMDS] = {
2349 [CPL_ACT_ESTABLISH] = sched,
2350 [CPL_ACT_OPEN_RPL] = sched,
2351 [CPL_RX_DATA] = sched,
2352 [CPL_ABORT_RPL_RSS] = sched,
2353 [CPL_ABORT_RPL] = sched,
2354 [CPL_PASS_OPEN_RPL] = sched,
2355 [CPL_CLOSE_LISTSRV_RPL] = sched,
2356 [CPL_PASS_ACCEPT_REQ] = sched,
2357 [CPL_PASS_ESTABLISH] = sched,
2358 [CPL_PEER_CLOSE] = sched,
2359 [CPL_CLOSE_CON_RPL] = sched,
2360 [CPL_ABORT_REQ_RSS] = sched,
2361 [CPL_RDMA_TERMINATE] = sched,
2362 [CPL_FW4_ACK] = sched,
2363 [CPL_SET_TCB_RPL] = set_tcb_rpl,
2364 [CPL_FW6_MSG] = fw6_msg
2365};
2366
cfdda9d7
SW		 2367int __init c4iw_cm_init(void)
2368{
be4c9bad 2369 spin_lock_init(&timeout_lock);
cfdda9d7
SW		 2370 skb_queue_head_init(&rxq);
2371
2372 workq = create_singlethread_workqueue("iw_cxgb4");
2373 if (!workq)
2374 return -ENOMEM;
2375
cfdda9d7
SW		 2376 return 0;
2377}
2378
2379void __exit c4iw_cm_term(void)
2380{
be4c9bad 2381 WARN_ON(!list_empty(&timeout_list));
cfdda9d7
SW		 2382 flush_workqueue(workq);
2383 destroy_workqueue(workq);
2384}
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