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4878704b6d70b1ff03425d142a0260d1f7e81222
[deliverable/linux.git] / drivers / infiniband / hw / cxgb4 / cm.c
1 /*
2 * Copyright (c) 2009-2010 Chelsio, Inc. All rights reserved.
3 *
4 * This software is available to you under a choice of one of two
5 * licenses. You may choose to be licensed under the terms of the GNU
6 * General Public License (GPL) Version 2, available from the file
7 * COPYING in the main directory of this source tree, or the
8 * OpenIB.org BSD license below:
9 *
10 * Redistribution and use in source and binary forms, with or
11 * without modification, are permitted provided that the following
12 * conditions are met:
13 *
14 * - Redistributions of source code must retain the above
15 * copyright notice, this list of conditions and the following
16 * disclaimer.
17 *
18 * - Redistributions in binary form must reproduce the above
19 * copyright notice, this list of conditions and the following
20 * disclaimer in the documentation and/or other materials
21 * provided with the distribution.
22 *
23 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
24 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
25 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
26 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
27 * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
28 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
29 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
30 * SOFTWARE.
31 */
32 #include <linux/module.h>
33 #include <linux/list.h>
34 #include <linux/workqueue.h>
35 #include <linux/skbuff.h>
36 #include <linux/timer.h>
37 #include <linux/notifier.h>
38 #include <linux/inetdevice.h>
39 #include <linux/ip.h>
40 #include <linux/tcp.h>
41
42 #include <net/neighbour.h>
43 #include <net/netevent.h>
44 #include <net/route.h>
45
46 #include "iw_cxgb4.h"
47
48 static char *states[] = {
49 "idle",
50 "listen",
51 "connecting",
52 "mpa_wait_req",
53 "mpa_req_sent",
54 "mpa_req_rcvd",
55 "mpa_rep_sent",
56 "fpdu_mode",
57 "aborting",
58 "closing",
59 "moribund",
60 "dead",
61 NULL,
62 };
63
64 static int nocong;
65 module_param(nocong, int, 0644);
66 MODULE_PARM_DESC(nocong, "Turn of congestion control (default=0)");
67
68 static int enable_ecn;
69 module_param(enable_ecn, int, 0644);
70 MODULE_PARM_DESC(enable_ecn, "Enable ECN (default=0/disabled)");
71
72 static int dack_mode = 1;
73 module_param(dack_mode, int, 0644);
74 MODULE_PARM_DESC(dack_mode, "Delayed ack mode (default=1)");
75
76 int c4iw_max_read_depth = 8;
77 module_param(c4iw_max_read_depth, int, 0644);
78 MODULE_PARM_DESC(c4iw_max_read_depth, "Per-connection max ORD/IRD (default=8)");
79
80 static int enable_tcp_timestamps;
81 module_param(enable_tcp_timestamps, int, 0644);
82 MODULE_PARM_DESC(enable_tcp_timestamps, "Enable tcp timestamps (default=0)");
83
84 static int enable_tcp_sack;
85 module_param(enable_tcp_sack, int, 0644);
86 MODULE_PARM_DESC(enable_tcp_sack, "Enable tcp SACK (default=0)");
87
88 static int enable_tcp_window_scaling = 1;
89 module_param(enable_tcp_window_scaling, int, 0644);
90 MODULE_PARM_DESC(enable_tcp_window_scaling,
91 "Enable tcp window scaling (default=1)");
92
93 int c4iw_debug;
94 module_param(c4iw_debug, int, 0644);
95 MODULE_PARM_DESC(c4iw_debug, "Enable debug logging (default=0)");
96
97 static int peer2peer;
98 module_param(peer2peer, int, 0644);
99 MODULE_PARM_DESC(peer2peer, "Support peer2peer ULPs (default=0)");
100
101 static int p2p_type = FW_RI_INIT_P2PTYPE_READ_REQ;
102 module_param(p2p_type, int, 0644);
103 MODULE_PARM_DESC(p2p_type, "RDMAP opcode to use for the RTR message: "
104 "1=RDMA_READ 0=RDMA_WRITE (default 1)");
105
106 static int ep_timeout_secs = 60;
107 module_param(ep_timeout_secs, int, 0644);
108 MODULE_PARM_DESC(ep_timeout_secs, "CM Endpoint operation timeout "
109 "in seconds (default=60)");
110
111 static int mpa_rev = 1;
112 module_param(mpa_rev, int, 0644);
113 MODULE_PARM_DESC(mpa_rev, "MPA Revision, 0 supports amso1100, "
114 "1 is RFC0544 spec compliant, 2 is IETF MPA Peer Connect Draft"
115 " compliant (default=1)");
116
117 static int markers_enabled;
118 module_param(markers_enabled, int, 0644);
119 MODULE_PARM_DESC(markers_enabled, "Enable MPA MARKERS (default(0)=disabled)");
120
121 static int crc_enabled = 1;
122 module_param(crc_enabled, int, 0644);
123 MODULE_PARM_DESC(crc_enabled, "Enable MPA CRC (default(1)=enabled)");
124
125 static int rcv_win = 256 * 1024;
126 module_param(rcv_win, int, 0644);
127 MODULE_PARM_DESC(rcv_win, "TCP receive window in bytes (default=256KB)");
128
129 static int snd_win = 128 * 1024;
130 module_param(snd_win, int, 0644);
131 MODULE_PARM_DESC(snd_win, "TCP send window in bytes (default=128KB)");
132
133 static struct workqueue_struct *workq;
134
135 static struct sk_buff_head rxq;
136
137 static struct sk_buff *get_skb(struct sk_buff *skb, int len, gfp_t gfp);
138 static void ep_timeout(unsigned long arg);
139 static void connect_reply_upcall(struct c4iw_ep *ep, int status);
140
141 static LIST_HEAD(timeout_list);
142 static spinlock_t timeout_lock;
143
144 static void start_ep_timer(struct c4iw_ep *ep)
145 {
146 PDBG("%s ep %p\n", __func__, ep);
147 if (timer_pending(&ep->timer)) {
148 PDBG("%s stopped / restarted timer ep %p\n", __func__, ep);
149 del_timer_sync(&ep->timer);
150 } else
151 c4iw_get_ep(&ep->com);
152 ep->timer.expires = jiffies + ep_timeout_secs * HZ;
153 ep->timer.data = (unsigned long)ep;
154 ep->timer.function = ep_timeout;
155 add_timer(&ep->timer);
156 }
157
158 static void stop_ep_timer(struct c4iw_ep *ep)
159 {
160 PDBG("%s ep %p\n", __func__, ep);
161 if (!timer_pending(&ep->timer)) {
162 WARN(1, "%s timer stopped when its not running! "
163 "ep %p state %u\n", __func__, ep, ep->com.state);
164 return;
165 }
166 del_timer_sync(&ep->timer);
167 c4iw_put_ep(&ep->com);
168 }
169
170 static int c4iw_l2t_send(struct c4iw_rdev *rdev, struct sk_buff *skb,
171 struct l2t_entry *l2e)
172 {
173 int error = 0;
174
175 if (c4iw_fatal_error(rdev)) {
176 kfree_skb(skb);
177 PDBG("%s - device in error state - dropping\n", __func__);
178 return -EIO;
179 }
180 error = cxgb4_l2t_send(rdev->lldi.ports[0], skb, l2e);
181 if (error < 0)
182 kfree_skb(skb);
183 return error < 0 ? error : 0;
184 }
185
186 int c4iw_ofld_send(struct c4iw_rdev *rdev, struct sk_buff *skb)
187 {
188 int error = 0;
189
190 if (c4iw_fatal_error(rdev)) {
191 kfree_skb(skb);
192 PDBG("%s - device in error state - dropping\n", __func__);
193 return -EIO;
194 }
195 error = cxgb4_ofld_send(rdev->lldi.ports[0], skb);
196 if (error < 0)
197 kfree_skb(skb);
198 return error < 0 ? error : 0;
199 }
200
201 static void release_tid(struct c4iw_rdev *rdev, u32 hwtid, struct sk_buff *skb)
202 {
203 struct cpl_tid_release *req;
204
205 skb = get_skb(skb, sizeof *req, GFP_KERNEL);
206 if (!skb)
207 return;
208 req = (struct cpl_tid_release *) skb_put(skb, sizeof(*req));
209 INIT_TP_WR(req, hwtid);
210 OPCODE_TID(req) = cpu_to_be32(MK_OPCODE_TID(CPL_TID_RELEASE, hwtid));
211 set_wr_txq(skb, CPL_PRIORITY_SETUP, 0);
212 c4iw_ofld_send(rdev, skb);
213 return;
214 }
215
216 static void set_emss(struct c4iw_ep *ep, u16 opt)
217 {
218 ep->emss = ep->com.dev->rdev.lldi.mtus[GET_TCPOPT_MSS(opt)] - 40;
219 ep->mss = ep->emss;
220 if (GET_TCPOPT_TSTAMP(opt))
221 ep->emss -= 12;
222 if (ep->emss < 128)
223 ep->emss = 128;
224 PDBG("%s mss_idx %u mss %u emss=%u\n", __func__, GET_TCPOPT_MSS(opt),
225 ep->mss, ep->emss);
226 }
227
228 static enum c4iw_ep_state state_read(struct c4iw_ep_common *epc)
229 {
230 enum c4iw_ep_state state;
231
232 mutex_lock(&epc->mutex);
233 state = epc->state;
234 mutex_unlock(&epc->mutex);
235 return state;
236 }
237
238 static void __state_set(struct c4iw_ep_common *epc, enum c4iw_ep_state new)
239 {
240 epc->state = new;
241 }
242
243 static void state_set(struct c4iw_ep_common *epc, enum c4iw_ep_state new)
244 {
245 mutex_lock(&epc->mutex);
246 PDBG("%s - %s -> %s\n", __func__, states[epc->state], states[new]);
247 __state_set(epc, new);
248 mutex_unlock(&epc->mutex);
249 return;
250 }
251
252 static void *alloc_ep(int size, gfp_t gfp)
253 {
254 struct c4iw_ep_common *epc;
255
256 epc = kzalloc(size, gfp);
257 if (epc) {
258 kref_init(&epc->kref);
259 mutex_init(&epc->mutex);
260 c4iw_init_wr_wait(&epc->wr_wait);
261 }
262 PDBG("%s alloc ep %p\n", __func__, epc);
263 return epc;
264 }
265
266 void _c4iw_free_ep(struct kref *kref)
267 {
268 struct c4iw_ep *ep;
269
270 ep = container_of(kref, struct c4iw_ep, com.kref);
271 PDBG("%s ep %p state %s\n", __func__, ep, states[state_read(&ep->com)]);
272 if (test_bit(RELEASE_RESOURCES, &ep->com.flags)) {
273 cxgb4_remove_tid(ep->com.dev->rdev.lldi.tids, 0, ep->hwtid);
274 dst_release(ep->dst);
275 cxgb4_l2t_release(ep->l2t);
276 }
277 kfree(ep);
278 }
279
280 static void release_ep_resources(struct c4iw_ep *ep)
281 {
282 set_bit(RELEASE_RESOURCES, &ep->com.flags);
283 c4iw_put_ep(&ep->com);
284 }
285
286 static int status2errno(int status)
287 {
288 switch (status) {
289 case CPL_ERR_NONE:
290 return 0;
291 case CPL_ERR_CONN_RESET:
292 return -ECONNRESET;
293 case CPL_ERR_ARP_MISS:
294 return -EHOSTUNREACH;
295 case CPL_ERR_CONN_TIMEDOUT:
296 return -ETIMEDOUT;
297 case CPL_ERR_TCAM_FULL:
298 return -ENOMEM;
299 case CPL_ERR_CONN_EXIST:
300 return -EADDRINUSE;
301 default:
302 return -EIO;
303 }
304 }
305
306 /*
307 * Try and reuse skbs already allocated...
308 */
309 static struct sk_buff *get_skb(struct sk_buff *skb, int len, gfp_t gfp)
310 {
311 if (skb && !skb_is_nonlinear(skb) && !skb_cloned(skb)) {
312 skb_trim(skb, 0);
313 skb_get(skb);
314 skb_reset_transport_header(skb);
315 } else {
316 skb = alloc_skb(len, gfp);
317 }
318 return skb;
319 }
320
321 static struct rtable *find_route(struct c4iw_dev *dev, __be32 local_ip,
322 __be32 peer_ip, __be16 local_port,
323 __be16 peer_port, u8 tos)
324 {
325 struct rtable *rt;
326 struct flowi4 fl4;
327
328 rt = ip_route_output_ports(&init_net, &fl4, NULL, peer_ip, local_ip,
329 peer_port, local_port, IPPROTO_TCP,
330 tos, 0);
331 if (IS_ERR(rt))
332 return NULL;
333 return rt;
334 }
335
336 static void arp_failure_discard(void *handle, struct sk_buff *skb)
337 {
338 PDBG("%s c4iw_dev %p\n", __func__, handle);
339 kfree_skb(skb);
340 }
341
342 /*
343 * Handle an ARP failure for an active open.
344 */
345 static void act_open_req_arp_failure(void *handle, struct sk_buff *skb)
346 {
347 printk(KERN_ERR MOD "ARP failure duing connect\n");
348 kfree_skb(skb);
349 }
350
351 /*
352 * Handle an ARP failure for a CPL_ABORT_REQ. Change it into a no RST variant
353 * and send it along.
354 */
355 static void abort_arp_failure(void *handle, struct sk_buff *skb)
356 {
357 struct c4iw_rdev *rdev = handle;
358 struct cpl_abort_req *req = cplhdr(skb);
359
360 PDBG("%s rdev %p\n", __func__, rdev);
361 req->cmd = CPL_ABORT_NO_RST;
362 c4iw_ofld_send(rdev, skb);
363 }
364
365 static void send_flowc(struct c4iw_ep *ep, struct sk_buff *skb)
366 {
367 unsigned int flowclen = 80;
368 struct fw_flowc_wr *flowc;
369 int i;
370
371 skb = get_skb(skb, flowclen, GFP_KERNEL);
372 flowc = (struct fw_flowc_wr *)__skb_put(skb, flowclen);
373
374 flowc->op_to_nparams = cpu_to_be32(FW_WR_OP(FW_FLOWC_WR) |
375 FW_FLOWC_WR_NPARAMS(8));
376 flowc->flowid_len16 = cpu_to_be32(FW_WR_LEN16(DIV_ROUND_UP(flowclen,
377 16)) | FW_WR_FLOWID(ep->hwtid));
378
379 flowc->mnemval[0].mnemonic = FW_FLOWC_MNEM_PFNVFN;
380 flowc->mnemval[0].val = cpu_to_be32(PCI_FUNC(ep->com.dev->rdev.lldi.pdev->devfn) << 8);
381 flowc->mnemval[1].mnemonic = FW_FLOWC_MNEM_CH;
382 flowc->mnemval[1].val = cpu_to_be32(ep->tx_chan);
383 flowc->mnemval[2].mnemonic = FW_FLOWC_MNEM_PORT;
384 flowc->mnemval[2].val = cpu_to_be32(ep->tx_chan);
385 flowc->mnemval[3].mnemonic = FW_FLOWC_MNEM_IQID;
386 flowc->mnemval[3].val = cpu_to_be32(ep->rss_qid);
387 flowc->mnemval[4].mnemonic = FW_FLOWC_MNEM_SNDNXT;
388 flowc->mnemval[4].val = cpu_to_be32(ep->snd_seq);
389 flowc->mnemval[5].mnemonic = FW_FLOWC_MNEM_RCVNXT;
390 flowc->mnemval[5].val = cpu_to_be32(ep->rcv_seq);
391 flowc->mnemval[6].mnemonic = FW_FLOWC_MNEM_SNDBUF;
392 flowc->mnemval[6].val = cpu_to_be32(snd_win);
393 flowc->mnemval[7].mnemonic = FW_FLOWC_MNEM_MSS;
394 flowc->mnemval[7].val = cpu_to_be32(ep->emss);
395 /* Pad WR to 16 byte boundary */
396 flowc->mnemval[8].mnemonic = 0;
397 flowc->mnemval[8].val = 0;
398 for (i = 0; i < 9; i++) {
399 flowc->mnemval[i].r4[0] = 0;
400 flowc->mnemval[i].r4[1] = 0;
401 flowc->mnemval[i].r4[2] = 0;
402 }
403
404 set_wr_txq(skb, CPL_PRIORITY_DATA, ep->txq_idx);
405 c4iw_ofld_send(&ep->com.dev->rdev, skb);
406 }
407
408 static int send_halfclose(struct c4iw_ep *ep, gfp_t gfp)
409 {
410 struct cpl_close_con_req *req;
411 struct sk_buff *skb;
412 int wrlen = roundup(sizeof *req, 16);
413
414 PDBG("%s ep %p tid %u\n", __func__, ep, ep->hwtid);
415 skb = get_skb(NULL, wrlen, gfp);
416 if (!skb) {
417 printk(KERN_ERR MOD "%s - failed to alloc skb\n", __func__);
418 return -ENOMEM;
419 }
420 set_wr_txq(skb, CPL_PRIORITY_DATA, ep->txq_idx);
421 t4_set_arp_err_handler(skb, NULL, arp_failure_discard);
422 req = (struct cpl_close_con_req *) skb_put(skb, wrlen);
423 memset(req, 0, wrlen);
424 INIT_TP_WR(req, ep->hwtid);
425 OPCODE_TID(req) = cpu_to_be32(MK_OPCODE_TID(CPL_CLOSE_CON_REQ,
426 ep->hwtid));
427 return c4iw_l2t_send(&ep->com.dev->rdev, skb, ep->l2t);
428 }
429
430 static int send_abort(struct c4iw_ep *ep, struct sk_buff *skb, gfp_t gfp)
431 {
432 struct cpl_abort_req *req;
433 int wrlen = roundup(sizeof *req, 16);
434
435 PDBG("%s ep %p tid %u\n", __func__, ep, ep->hwtid);
436 skb = get_skb(skb, wrlen, gfp);
437 if (!skb) {
438 printk(KERN_ERR MOD "%s - failed to alloc skb.\n",
439 __func__);
440 return -ENOMEM;
441 }
442 set_wr_txq(skb, CPL_PRIORITY_DATA, ep->txq_idx);
443 t4_set_arp_err_handler(skb, &ep->com.dev->rdev, abort_arp_failure);
444 req = (struct cpl_abort_req *) skb_put(skb, wrlen);
445 memset(req, 0, wrlen);
446 INIT_TP_WR(req, ep->hwtid);
447 OPCODE_TID(req) = cpu_to_be32(MK_OPCODE_TID(CPL_ABORT_REQ, ep->hwtid));
448 req->cmd = CPL_ABORT_SEND_RST;
449 return c4iw_l2t_send(&ep->com.dev->rdev, skb, ep->l2t);
450 }
451
452 #define VLAN_NONE 0xfff
453 #define FILTER_SEL_VLAN_NONE 0xffff
454 #define FILTER_SEL_WIDTH_P_FC (3+1) /* port uses 3 bits, FCoE one bit */
455 #define FILTER_SEL_WIDTH_VIN_P_FC \
456 (6 + 7 + FILTER_SEL_WIDTH_P_FC) /* 6 bits are unused, VF uses 7 bits*/
457 #define FILTER_SEL_WIDTH_TAG_P_FC \
458 (3 + FILTER_SEL_WIDTH_VIN_P_FC) /* PF uses 3 bits */
459 #define FILTER_SEL_WIDTH_VLD_TAG_P_FC (1 + FILTER_SEL_WIDTH_TAG_P_FC)
460
461 static unsigned int select_ntuple(struct c4iw_dev *dev, struct dst_entry *dst,
462 struct l2t_entry *l2t)
463 {
464 unsigned int ntuple = 0;
465 u32 viid;
466
467 switch (dev->rdev.lldi.filt_mode) {
468
469 /* default filter mode */
470 case HW_TPL_FR_MT_PR_IV_P_FC:
471 if (l2t->vlan == VLAN_NONE)
472 ntuple |= FILTER_SEL_VLAN_NONE << FILTER_SEL_WIDTH_P_FC;
473 else {
474 ntuple |= l2t->vlan << FILTER_SEL_WIDTH_P_FC;
475 ntuple |= 1 << FILTER_SEL_WIDTH_VLD_TAG_P_FC;
476 }
477 ntuple |= l2t->lport << S_PORT | IPPROTO_TCP <<
478 FILTER_SEL_WIDTH_VLD_TAG_P_FC;
479 break;
480 case HW_TPL_FR_MT_PR_OV_P_FC: {
481 viid = cxgb4_port_viid(l2t->neigh->dev);
482
483 ntuple |= FW_VIID_VIN_GET(viid) << FILTER_SEL_WIDTH_P_FC;
484 ntuple |= FW_VIID_PFN_GET(viid) << FILTER_SEL_WIDTH_VIN_P_FC;
485 ntuple |= FW_VIID_VIVLD_GET(viid) << FILTER_SEL_WIDTH_TAG_P_FC;
486 ntuple |= l2t->lport << S_PORT | IPPROTO_TCP <<
487 FILTER_SEL_WIDTH_VLD_TAG_P_FC;
488 break;
489 }
490 default:
491 break;
492 }
493 return ntuple;
494 }
495
496 static int send_connect(struct c4iw_ep *ep)
497 {
498 struct cpl_act_open_req *req;
499 struct sk_buff *skb;
500 u64 opt0;
501 u32 opt2;
502 unsigned int mtu_idx;
503 int wscale;
504 int wrlen = roundup(sizeof *req, 16);
505
506 PDBG("%s ep %p atid %u\n", __func__, ep, ep->atid);
507
508 skb = get_skb(NULL, wrlen, GFP_KERNEL);
509 if (!skb) {
510 printk(KERN_ERR MOD "%s - failed to alloc skb.\n",
511 __func__);
512 return -ENOMEM;
513 }
514 set_wr_txq(skb, CPL_PRIORITY_SETUP, ep->ctrlq_idx);
515
516 cxgb4_best_mtu(ep->com.dev->rdev.lldi.mtus, ep->mtu, &mtu_idx);
517 wscale = compute_wscale(rcv_win);
518 opt0 = (nocong ? NO_CONG(1) : 0) |
519 KEEP_ALIVE(1) |
520 DELACK(1) |
521 WND_SCALE(wscale) |
522 MSS_IDX(mtu_idx) |
523 L2T_IDX(ep->l2t->idx) |
524 TX_CHAN(ep->tx_chan) |
525 SMAC_SEL(ep->smac_idx) |
526 DSCP(ep->tos) |
527 ULP_MODE(ULP_MODE_TCPDDP) |
528 RCV_BUFSIZ(rcv_win>>10);
529 opt2 = RX_CHANNEL(0) |
530 CCTRL_ECN(enable_ecn) |
531 RSS_QUEUE_VALID | RSS_QUEUE(ep->rss_qid);
532 if (enable_tcp_timestamps)
533 opt2 |= TSTAMPS_EN(1);
534 if (enable_tcp_sack)
535 opt2 |= SACK_EN(1);
536 if (wscale && enable_tcp_window_scaling)
537 opt2 |= WND_SCALE_EN(1);
538 t4_set_arp_err_handler(skb, NULL, act_open_req_arp_failure);
539
540 req = (struct cpl_act_open_req *) skb_put(skb, wrlen);
541 INIT_TP_WR(req, 0);
542 OPCODE_TID(req) = cpu_to_be32(
543 MK_OPCODE_TID(CPL_ACT_OPEN_REQ, ((ep->rss_qid<<14)|ep->atid)));
544 req->local_port = ep->com.local_addr.sin_port;
545 req->peer_port = ep->com.remote_addr.sin_port;
546 req->local_ip = ep->com.local_addr.sin_addr.s_addr;
547 req->peer_ip = ep->com.remote_addr.sin_addr.s_addr;
548 req->opt0 = cpu_to_be64(opt0);
549 req->params = cpu_to_be32(select_ntuple(ep->com.dev, ep->dst, ep->l2t));
550 req->opt2 = cpu_to_be32(opt2);
551 return c4iw_l2t_send(&ep->com.dev->rdev, skb, ep->l2t);
552 }
553
554 static void send_mpa_req(struct c4iw_ep *ep, struct sk_buff *skb,
555 u8 mpa_rev_to_use)
556 {
557 int mpalen, wrlen;
558 struct fw_ofld_tx_data_wr *req;
559 struct mpa_message *mpa;
560 struct mpa_v2_conn_params mpa_v2_params;
561
562 PDBG("%s ep %p tid %u pd_len %d\n", __func__, ep, ep->hwtid, ep->plen);
563
564 BUG_ON(skb_cloned(skb));
565
566 mpalen = sizeof(*mpa) + ep->plen;
567 if (mpa_rev_to_use == 2)
568 mpalen += sizeof(struct mpa_v2_conn_params);
569 wrlen = roundup(mpalen + sizeof *req, 16);
570 skb = get_skb(skb, wrlen, GFP_KERNEL);
571 if (!skb) {
572 connect_reply_upcall(ep, -ENOMEM);
573 return;
574 }
575 set_wr_txq(skb, CPL_PRIORITY_DATA, ep->txq_idx);
576
577 req = (struct fw_ofld_tx_data_wr *)skb_put(skb, wrlen);
578 memset(req, 0, wrlen);
579 req->op_to_immdlen = cpu_to_be32(
580 FW_WR_OP(FW_OFLD_TX_DATA_WR) |
581 FW_WR_COMPL(1) |
582 FW_WR_IMMDLEN(mpalen));
583 req->flowid_len16 = cpu_to_be32(
584 FW_WR_FLOWID(ep->hwtid) |
585 FW_WR_LEN16(wrlen >> 4));
586 req->plen = cpu_to_be32(mpalen);
587 req->tunnel_to_proxy = cpu_to_be32(
588 FW_OFLD_TX_DATA_WR_FLUSH(1) |
589 FW_OFLD_TX_DATA_WR_SHOVE(1));
590
591 mpa = (struct mpa_message *)(req + 1);
592 memcpy(mpa->key, MPA_KEY_REQ, sizeof(mpa->key));
593 mpa->flags = (crc_enabled ? MPA_CRC : 0) |
594 (markers_enabled ? MPA_MARKERS : 0) |
595 (mpa_rev_to_use == 2 ? MPA_ENHANCED_RDMA_CONN : 0);
596 mpa->private_data_size = htons(ep->plen);
597 mpa->revision = mpa_rev_to_use;
598 if (mpa_rev_to_use == 1) {
599 ep->tried_with_mpa_v1 = 1;
600 ep->retry_with_mpa_v1 = 0;
601 }
602
603 if (mpa_rev_to_use == 2) {
604 mpa->private_data_size = htons(ntohs(mpa->private_data_size) +
605 sizeof (struct mpa_v2_conn_params));
606 mpa_v2_params.ird = htons((u16)ep->ird);
607 mpa_v2_params.ord = htons((u16)ep->ord);
608
609 if (peer2peer) {
610 mpa_v2_params.ird |= htons(MPA_V2_PEER2PEER_MODEL);
611 if (p2p_type == FW_RI_INIT_P2PTYPE_RDMA_WRITE)
612 mpa_v2_params.ord |=
613 htons(MPA_V2_RDMA_WRITE_RTR);
614 else if (p2p_type == FW_RI_INIT_P2PTYPE_READ_REQ)
615 mpa_v2_params.ord |=
616 htons(MPA_V2_RDMA_READ_RTR);
617 }
618 memcpy(mpa->private_data, &mpa_v2_params,
619 sizeof(struct mpa_v2_conn_params));
620
621 if (ep->plen)
622 memcpy(mpa->private_data +
623 sizeof(struct mpa_v2_conn_params),
624 ep->mpa_pkt + sizeof(*mpa), ep->plen);
625 } else
626 if (ep->plen)
627 memcpy(mpa->private_data,
628 ep->mpa_pkt + sizeof(*mpa), ep->plen);
629
630 /*
631 * Reference the mpa skb. This ensures the data area
632 * will remain in memory until the hw acks the tx.
633 * Function fw4_ack() will deref it.
634 */
635 skb_get(skb);
636 t4_set_arp_err_handler(skb, NULL, arp_failure_discard);
637 BUG_ON(ep->mpa_skb);
638 ep->mpa_skb = skb;
639 c4iw_l2t_send(&ep->com.dev->rdev, skb, ep->l2t);
640 start_ep_timer(ep);
641 state_set(&ep->com, MPA_REQ_SENT);
642 ep->mpa_attr.initiator = 1;
643 return;
644 }
645
646 static int send_mpa_reject(struct c4iw_ep *ep, const void *pdata, u8 plen)
647 {
648 int mpalen, wrlen;
649 struct fw_ofld_tx_data_wr *req;
650 struct mpa_message *mpa;
651 struct sk_buff *skb;
652 struct mpa_v2_conn_params mpa_v2_params;
653
654 PDBG("%s ep %p tid %u pd_len %d\n", __func__, ep, ep->hwtid, ep->plen);
655
656 mpalen = sizeof(*mpa) + plen;
657 if (ep->mpa_attr.version == 2 && ep->mpa_attr.enhanced_rdma_conn)
658 mpalen += sizeof(struct mpa_v2_conn_params);
659 wrlen = roundup(mpalen + sizeof *req, 16);
660
661 skb = get_skb(NULL, wrlen, GFP_KERNEL);
662 if (!skb) {
663 printk(KERN_ERR MOD "%s - cannot alloc skb!\n", __func__);
664 return -ENOMEM;
665 }
666 set_wr_txq(skb, CPL_PRIORITY_DATA, ep->txq_idx);
667
668 req = (struct fw_ofld_tx_data_wr *)skb_put(skb, wrlen);
669 memset(req, 0, wrlen);
670 req->op_to_immdlen = cpu_to_be32(
671 FW_WR_OP(FW_OFLD_TX_DATA_WR) |
672 FW_WR_COMPL(1) |
673 FW_WR_IMMDLEN(mpalen));
674 req->flowid_len16 = cpu_to_be32(
675 FW_WR_FLOWID(ep->hwtid) |
676 FW_WR_LEN16(wrlen >> 4));
677 req->plen = cpu_to_be32(mpalen);
678 req->tunnel_to_proxy = cpu_to_be32(
679 FW_OFLD_TX_DATA_WR_FLUSH(1) |
680 FW_OFLD_TX_DATA_WR_SHOVE(1));
681
682 mpa = (struct mpa_message *)(req + 1);
683 memset(mpa, 0, sizeof(*mpa));
684 memcpy(mpa->key, MPA_KEY_REP, sizeof(mpa->key));
685 mpa->flags = MPA_REJECT;
686 mpa->revision = mpa_rev;
687 mpa->private_data_size = htons(plen);
688
689 if (ep->mpa_attr.version == 2 && ep->mpa_attr.enhanced_rdma_conn) {
690 mpa->flags |= MPA_ENHANCED_RDMA_CONN;
691 mpa->private_data_size = htons(ntohs(mpa->private_data_size) +
692 sizeof (struct mpa_v2_conn_params));
693 mpa_v2_params.ird = htons(((u16)ep->ird) |
694 (peer2peer ? MPA_V2_PEER2PEER_MODEL :
695 0));
696 mpa_v2_params.ord = htons(((u16)ep->ord) | (peer2peer ?
697 (p2p_type ==
698 FW_RI_INIT_P2PTYPE_RDMA_WRITE ?
699 MPA_V2_RDMA_WRITE_RTR : p2p_type ==
700 FW_RI_INIT_P2PTYPE_READ_REQ ?
701 MPA_V2_RDMA_READ_RTR : 0) : 0));
702 memcpy(mpa->private_data, &mpa_v2_params,
703 sizeof(struct mpa_v2_conn_params));
704
705 if (ep->plen)
706 memcpy(mpa->private_data +
707 sizeof(struct mpa_v2_conn_params), pdata, plen);
708 } else
709 if (plen)
710 memcpy(mpa->private_data, pdata, plen);
711
712 /*
713 * Reference the mpa skb again. This ensures the data area
714 * will remain in memory until the hw acks the tx.
715 * Function fw4_ack() will deref it.
716 */
717 skb_get(skb);
718 set_wr_txq(skb, CPL_PRIORITY_DATA, ep->txq_idx);
719 t4_set_arp_err_handler(skb, NULL, arp_failure_discard);
720 BUG_ON(ep->mpa_skb);
721 ep->mpa_skb = skb;
722 return c4iw_l2t_send(&ep->com.dev->rdev, skb, ep->l2t);
723 }
724
725 static int send_mpa_reply(struct c4iw_ep *ep, const void *pdata, u8 plen)
726 {
727 int mpalen, wrlen;
728 struct fw_ofld_tx_data_wr *req;
729 struct mpa_message *mpa;
730 struct sk_buff *skb;
731 struct mpa_v2_conn_params mpa_v2_params;
732
733 PDBG("%s ep %p tid %u pd_len %d\n", __func__, ep, ep->hwtid, ep->plen);
734
735 mpalen = sizeof(*mpa) + plen;
736 if (ep->mpa_attr.version == 2 && ep->mpa_attr.enhanced_rdma_conn)
737 mpalen += sizeof(struct mpa_v2_conn_params);
738 wrlen = roundup(mpalen + sizeof *req, 16);
739
740 skb = get_skb(NULL, wrlen, GFP_KERNEL);
741 if (!skb) {
742 printk(KERN_ERR MOD "%s - cannot alloc skb!\n", __func__);
743 return -ENOMEM;
744 }
745 set_wr_txq(skb, CPL_PRIORITY_DATA, ep->txq_idx);
746
747 req = (struct fw_ofld_tx_data_wr *) skb_put(skb, wrlen);
748 memset(req, 0, wrlen);
749 req->op_to_immdlen = cpu_to_be32(
750 FW_WR_OP(FW_OFLD_TX_DATA_WR) |
751 FW_WR_COMPL(1) |
752 FW_WR_IMMDLEN(mpalen));
753 req->flowid_len16 = cpu_to_be32(
754 FW_WR_FLOWID(ep->hwtid) |
755 FW_WR_LEN16(wrlen >> 4));
756 req->plen = cpu_to_be32(mpalen);
757 req->tunnel_to_proxy = cpu_to_be32(
758 FW_OFLD_TX_DATA_WR_FLUSH(1) |
759 FW_OFLD_TX_DATA_WR_SHOVE(1));
760
761 mpa = (struct mpa_message *)(req + 1);
762 memset(mpa, 0, sizeof(*mpa));
763 memcpy(mpa->key, MPA_KEY_REP, sizeof(mpa->key));
764 mpa->flags = (ep->mpa_attr.crc_enabled ? MPA_CRC : 0) |
765 (markers_enabled ? MPA_MARKERS : 0);
766 mpa->revision = ep->mpa_attr.version;
767 mpa->private_data_size = htons(plen);
768
769 if (ep->mpa_attr.version == 2 && ep->mpa_attr.enhanced_rdma_conn) {
770 mpa->flags |= MPA_ENHANCED_RDMA_CONN;
771 mpa->private_data_size = htons(ntohs(mpa->private_data_size) +
772 sizeof (struct mpa_v2_conn_params));
773 mpa_v2_params.ird = htons((u16)ep->ird);
774 mpa_v2_params.ord = htons((u16)ep->ord);
775 if (peer2peer && (ep->mpa_attr.p2p_type !=
776 FW_RI_INIT_P2PTYPE_DISABLED)) {
777 mpa_v2_params.ird |= htons(MPA_V2_PEER2PEER_MODEL);
778
779 if (p2p_type == FW_RI_INIT_P2PTYPE_RDMA_WRITE)
780 mpa_v2_params.ord |=
781 htons(MPA_V2_RDMA_WRITE_RTR);
782 else if (p2p_type == FW_RI_INIT_P2PTYPE_READ_REQ)
783 mpa_v2_params.ord |=
784 htons(MPA_V2_RDMA_READ_RTR);
785 }
786
787 memcpy(mpa->private_data, &mpa_v2_params,
788 sizeof(struct mpa_v2_conn_params));
789
790 if (ep->plen)
791 memcpy(mpa->private_data +
792 sizeof(struct mpa_v2_conn_params), pdata, plen);
793 } else
794 if (plen)
795 memcpy(mpa->private_data, pdata, plen);
796
797 /*
798 * Reference the mpa skb. This ensures the data area
799 * will remain in memory until the hw acks the tx.
800 * Function fw4_ack() will deref it.
801 */
802 skb_get(skb);
803 t4_set_arp_err_handler(skb, NULL, arp_failure_discard);
804 ep->mpa_skb = skb;
805 state_set(&ep->com, MPA_REP_SENT);
806 return c4iw_l2t_send(&ep->com.dev->rdev, skb, ep->l2t);
807 }
808
809 static int act_establish(struct c4iw_dev *dev, struct sk_buff *skb)
810 {
811 struct c4iw_ep *ep;
812 struct cpl_act_establish *req = cplhdr(skb);
813 unsigned int tid = GET_TID(req);
814 unsigned int atid = GET_TID_TID(ntohl(req->tos_atid));
815 struct tid_info *t = dev->rdev.lldi.tids;
816
817 ep = lookup_atid(t, atid);
818
819 PDBG("%s ep %p tid %u snd_isn %u rcv_isn %u\n", __func__, ep, tid,
820 be32_to_cpu(req->snd_isn), be32_to_cpu(req->rcv_isn));
821
822 dst_confirm(ep->dst);
823
824 /* setup the hwtid for this connection */
825 ep->hwtid = tid;
826 cxgb4_insert_tid(t, ep, tid);
827
828 ep->snd_seq = be32_to_cpu(req->snd_isn);
829 ep->rcv_seq = be32_to_cpu(req->rcv_isn);
830
831 set_emss(ep, ntohs(req->tcp_opt));
832
833 /* dealloc the atid */
834 cxgb4_free_atid(t, atid);
835
836 /* start MPA negotiation */
837 send_flowc(ep, NULL);
838 if (ep->retry_with_mpa_v1)
839 send_mpa_req(ep, skb, 1);
840 else
841 send_mpa_req(ep, skb, mpa_rev);
842
843 return 0;
844 }
845
846 static void close_complete_upcall(struct c4iw_ep *ep)
847 {
848 struct iw_cm_event event;
849
850 PDBG("%s ep %p tid %u\n", __func__, ep, ep->hwtid);
851 memset(&event, 0, sizeof(event));
852 event.event = IW_CM_EVENT_CLOSE;
853 if (ep->com.cm_id) {
854 PDBG("close complete delivered ep %p cm_id %p tid %u\n",
855 ep, ep->com.cm_id, ep->hwtid);
856 ep->com.cm_id->event_handler(ep->com.cm_id, &event);
857 ep->com.cm_id->rem_ref(ep->com.cm_id);
858 ep->com.cm_id = NULL;
859 ep->com.qp = NULL;
860 }
861 }
862
863 static int abort_connection(struct c4iw_ep *ep, struct sk_buff *skb, gfp_t gfp)
864 {
865 PDBG("%s ep %p tid %u\n", __func__, ep, ep->hwtid);
866 close_complete_upcall(ep);
867 state_set(&ep->com, ABORTING);
868 return send_abort(ep, skb, gfp);
869 }
870
871 static void peer_close_upcall(struct c4iw_ep *ep)
872 {
873 struct iw_cm_event event;
874
875 PDBG("%s ep %p tid %u\n", __func__, ep, ep->hwtid);
876 memset(&event, 0, sizeof(event));
877 event.event = IW_CM_EVENT_DISCONNECT;
878 if (ep->com.cm_id) {
879 PDBG("peer close delivered ep %p cm_id %p tid %u\n",
880 ep, ep->com.cm_id, ep->hwtid);
881 ep->com.cm_id->event_handler(ep->com.cm_id, &event);
882 }
883 }
884
885 static void peer_abort_upcall(struct c4iw_ep *ep)
886 {
887 struct iw_cm_event event;
888
889 PDBG("%s ep %p tid %u\n", __func__, ep, ep->hwtid);
890 memset(&event, 0, sizeof(event));
891 event.event = IW_CM_EVENT_CLOSE;
892 event.status = -ECONNRESET;
893 if (ep->com.cm_id) {
894 PDBG("abort delivered ep %p cm_id %p tid %u\n", ep,
895 ep->com.cm_id, ep->hwtid);
896 ep->com.cm_id->event_handler(ep->com.cm_id, &event);
897 ep->com.cm_id->rem_ref(ep->com.cm_id);
898 ep->com.cm_id = NULL;
899 ep->com.qp = NULL;
900 }
901 }
902
903 static void connect_reply_upcall(struct c4iw_ep *ep, int status)
904 {
905 struct iw_cm_event event;
906
907 PDBG("%s ep %p tid %u status %d\n", __func__, ep, ep->hwtid, status);
908 memset(&event, 0, sizeof(event));
909 event.event = IW_CM_EVENT_CONNECT_REPLY;
910 event.status = status;
911 event.local_addr = ep->com.local_addr;
912 event.remote_addr = ep->com.remote_addr;
913
914 if ((status == 0) || (status == -ECONNREFUSED)) {
915 if (!ep->tried_with_mpa_v1) {
916 /* this means MPA_v2 is used */
917 event.private_data_len = ep->plen -
918 sizeof(struct mpa_v2_conn_params);
919 event.private_data = ep->mpa_pkt +
920 sizeof(struct mpa_message) +
921 sizeof(struct mpa_v2_conn_params);
922 } else {
923 /* this means MPA_v1 is used */
924 event.private_data_len = ep->plen;
925 event.private_data = ep->mpa_pkt +
926 sizeof(struct mpa_message);
927 }
928 }
929
930 PDBG("%s ep %p tid %u status %d\n", __func__, ep,
931 ep->hwtid, status);
932 ep->com.cm_id->event_handler(ep->com.cm_id, &event);
933
934 if (status < 0) {
935 ep->com.cm_id->rem_ref(ep->com.cm_id);
936 ep->com.cm_id = NULL;
937 ep->com.qp = NULL;
938 }
939 }
940
941 static void connect_request_upcall(struct c4iw_ep *ep)
942 {
943 struct iw_cm_event event;
944
945 PDBG("%s ep %p tid %u\n", __func__, ep, ep->hwtid);
946 memset(&event, 0, sizeof(event));
947 event.event = IW_CM_EVENT_CONNECT_REQUEST;
948 event.local_addr = ep->com.local_addr;
949 event.remote_addr = ep->com.remote_addr;
950 event.provider_data = ep;
951 if (!ep->tried_with_mpa_v1) {
952 /* this means MPA_v2 is used */
953 event.ord = ep->ord;
954 event.ird = ep->ird;
955 event.private_data_len = ep->plen -
956 sizeof(struct mpa_v2_conn_params);
957 event.private_data = ep->mpa_pkt + sizeof(struct mpa_message) +
958 sizeof(struct mpa_v2_conn_params);
959 } else {
960 /* this means MPA_v1 is used. Send max supported */
961 event.ord = c4iw_max_read_depth;
962 event.ird = c4iw_max_read_depth;
963 event.private_data_len = ep->plen;
964 event.private_data = ep->mpa_pkt + sizeof(struct mpa_message);
965 }
966 if (state_read(&ep->parent_ep->com) != DEAD) {
967 c4iw_get_ep(&ep->com);
968 ep->parent_ep->com.cm_id->event_handler(
969 ep->parent_ep->com.cm_id,
970 &event);
971 }
972 c4iw_put_ep(&ep->parent_ep->com);
973 ep->parent_ep = NULL;
974 }
975
976 static void established_upcall(struct c4iw_ep *ep)
977 {
978 struct iw_cm_event event;
979
980 PDBG("%s ep %p tid %u\n", __func__, ep, ep->hwtid);
981 memset(&event, 0, sizeof(event));
982 event.event = IW_CM_EVENT_ESTABLISHED;
983 event.ird = ep->ird;
984 event.ord = ep->ord;
985 if (ep->com.cm_id) {
986 PDBG("%s ep %p tid %u\n", __func__, ep, ep->hwtid);
987 ep->com.cm_id->event_handler(ep->com.cm_id, &event);
988 }
989 }
990
991 static int update_rx_credits(struct c4iw_ep *ep, u32 credits)
992 {
993 struct cpl_rx_data_ack *req;
994 struct sk_buff *skb;
995 int wrlen = roundup(sizeof *req, 16);
996
997 PDBG("%s ep %p tid %u credits %u\n", __func__, ep, ep->hwtid, credits);
998 skb = get_skb(NULL, wrlen, GFP_KERNEL);
999 if (!skb) {
1000 printk(KERN_ERR MOD "update_rx_credits - cannot alloc skb!\n");
1001 return 0;
1002 }
1003
1004 req = (struct cpl_rx_data_ack *) skb_put(skb, wrlen);
1005 memset(req, 0, wrlen);
1006 INIT_TP_WR(req, ep->hwtid);
1007 OPCODE_TID(req) = cpu_to_be32(MK_OPCODE_TID(CPL_RX_DATA_ACK,
1008 ep->hwtid));
1009 req->credit_dack = cpu_to_be32(credits | RX_FORCE_ACK(1) |
1010 F_RX_DACK_CHANGE |
1011 V_RX_DACK_MODE(dack_mode));
1012 set_wr_txq(skb, CPL_PRIORITY_ACK, ep->ctrlq_idx);
1013 c4iw_ofld_send(&ep->com.dev->rdev, skb);
1014 return credits;
1015 }
1016
1017 static void process_mpa_reply(struct c4iw_ep *ep, struct sk_buff *skb)
1018 {
1019 struct mpa_message *mpa;
1020 struct mpa_v2_conn_params *mpa_v2_params;
1021 u16 plen;
1022 u16 resp_ird, resp_ord;
1023 u8 rtr_mismatch = 0, insuff_ird = 0;
1024 struct c4iw_qp_attributes attrs;
1025 enum c4iw_qp_attr_mask mask;
1026 int err;
1027
1028 PDBG("%s ep %p tid %u\n", __func__, ep, ep->hwtid);
1029
1030 /*
1031 * Stop mpa timer. If it expired, then the state has
1032 * changed and we bail since ep_timeout already aborted
1033 * the connection.
1034 */
1035 stop_ep_timer(ep);
1036 if (state_read(&ep->com) != MPA_REQ_SENT)
1037 return;
1038
1039 /*
1040 * If we get more than the supported amount of private data
1041 * then we must fail this connection.
1042 */
1043 if (ep->mpa_pkt_len + skb->len > sizeof(ep->mpa_pkt)) {
1044 err = -EINVAL;
1045 goto err;
1046 }
1047
1048 /*
1049 * copy the new data into our accumulation buffer.
1050 */
1051 skb_copy_from_linear_data(skb, &(ep->mpa_pkt[ep->mpa_pkt_len]),
1052 skb->len);
1053 ep->mpa_pkt_len += skb->len;
1054
1055 /*
1056 * if we don't even have the mpa message, then bail.
1057 */
1058 if (ep->mpa_pkt_len < sizeof(*mpa))
1059 return;
1060 mpa = (struct mpa_message *) ep->mpa_pkt;
1061
1062 /* Validate MPA header. */
1063 if (mpa->revision > mpa_rev) {
1064 printk(KERN_ERR MOD "%s MPA version mismatch. Local = %d,"
1065 " Received = %d\n", __func__, mpa_rev, mpa->revision);
1066 err = -EPROTO;
1067 goto err;
1068 }
1069 if (memcmp(mpa->key, MPA_KEY_REP, sizeof(mpa->key))) {
1070 err = -EPROTO;
1071 goto err;
1072 }
1073
1074 plen = ntohs(mpa->private_data_size);
1075
1076 /*
1077 * Fail if there's too much private data.
1078 */
1079 if (plen > MPA_MAX_PRIVATE_DATA) {
1080 err = -EPROTO;
1081 goto err;
1082 }
1083
1084 /*
1085 * If plen does not account for pkt size
1086 */
1087 if (ep->mpa_pkt_len > (sizeof(*mpa) + plen)) {
1088 err = -EPROTO;
1089 goto err;
1090 }
1091
1092 ep->plen = (u8) plen;
1093
1094 /*
1095 * If we don't have all the pdata yet, then bail.
1096 * We'll continue process when more data arrives.
1097 */
1098 if (ep->mpa_pkt_len < (sizeof(*mpa) + plen))
1099 return;
1100
1101 if (mpa->flags & MPA_REJECT) {
1102 err = -ECONNREFUSED;
1103 goto err;
1104 }
1105
1106 /*
1107 * If we get here we have accumulated the entire mpa
1108 * start reply message including private data. And
1109 * the MPA header is valid.
1110 */
1111 state_set(&ep->com, FPDU_MODE);
1112 ep->mpa_attr.crc_enabled = (mpa->flags & MPA_CRC) | crc_enabled ? 1 : 0;
1113 ep->mpa_attr.recv_marker_enabled = markers_enabled;
1114 ep->mpa_attr.xmit_marker_enabled = mpa->flags & MPA_MARKERS ? 1 : 0;
1115 ep->mpa_attr.version = mpa->revision;
1116 ep->mpa_attr.p2p_type = FW_RI_INIT_P2PTYPE_DISABLED;
1117
1118 if (mpa->revision == 2) {
1119 ep->mpa_attr.enhanced_rdma_conn =
1120 mpa->flags & MPA_ENHANCED_RDMA_CONN ? 1 : 0;
1121 if (ep->mpa_attr.enhanced_rdma_conn) {
1122 mpa_v2_params = (struct mpa_v2_conn_params *)
1123 (ep->mpa_pkt + sizeof(*mpa));
1124 resp_ird = ntohs(mpa_v2_params->ird) &
1125 MPA_V2_IRD_ORD_MASK;
1126 resp_ord = ntohs(mpa_v2_params->ord) &
1127 MPA_V2_IRD_ORD_MASK;
1128
1129 /*
1130 * This is a double-check. Ideally, below checks are
1131 * not required since ird/ord stuff has been taken
1132 * care of in c4iw_accept_cr
1133 */
1134 if ((ep->ird < resp_ord) || (ep->ord > resp_ird)) {
1135 err = -ENOMEM;
1136 ep->ird = resp_ord;
1137 ep->ord = resp_ird;
1138 insuff_ird = 1;
1139 }
1140
1141 if (ntohs(mpa_v2_params->ird) &
1142 MPA_V2_PEER2PEER_MODEL) {
1143 if (ntohs(mpa_v2_params->ord) &
1144 MPA_V2_RDMA_WRITE_RTR)
1145 ep->mpa_attr.p2p_type =
1146 FW_RI_INIT_P2PTYPE_RDMA_WRITE;
1147 else if (ntohs(mpa_v2_params->ord) &
1148 MPA_V2_RDMA_READ_RTR)
1149 ep->mpa_attr.p2p_type =
1150 FW_RI_INIT_P2PTYPE_READ_REQ;
1151 }
1152 }
1153 } else if (mpa->revision == 1)
1154 if (peer2peer)
1155 ep->mpa_attr.p2p_type = p2p_type;
1156
1157 PDBG("%s - crc_enabled=%d, recv_marker_enabled=%d, "
1158 "xmit_marker_enabled=%d, version=%d p2p_type=%d local-p2p_type = "
1159 "%d\n", __func__, ep->mpa_attr.crc_enabled,
1160 ep->mpa_attr.recv_marker_enabled,
1161 ep->mpa_attr.xmit_marker_enabled, ep->mpa_attr.version,
1162 ep->mpa_attr.p2p_type, p2p_type);
1163
1164 /*
1165 * If responder's RTR does not match with that of initiator, assign
1166 * FW_RI_INIT_P2PTYPE_DISABLED in mpa attributes so that RTR is not
1167 * generated when moving QP to RTS state.
1168 * A TERM message will be sent after QP has moved to RTS state
1169 */
1170 if ((ep->mpa_attr.version == 2) && peer2peer &&
1171 (ep->mpa_attr.p2p_type != p2p_type)) {
1172 ep->mpa_attr.p2p_type = FW_RI_INIT_P2PTYPE_DISABLED;
1173 rtr_mismatch = 1;
1174 }
1175
1176 attrs.mpa_attr = ep->mpa_attr;
1177 attrs.max_ird = ep->ird;
1178 attrs.max_ord = ep->ord;
1179 attrs.llp_stream_handle = ep;
1180 attrs.next_state = C4IW_QP_STATE_RTS;
1181
1182 mask = C4IW_QP_ATTR_NEXT_STATE |
1183 C4IW_QP_ATTR_LLP_STREAM_HANDLE | C4IW_QP_ATTR_MPA_ATTR |
1184 C4IW_QP_ATTR_MAX_IRD | C4IW_QP_ATTR_MAX_ORD;
1185
1186 /* bind QP and TID with INIT_WR */
1187 err = c4iw_modify_qp(ep->com.qp->rhp,
1188 ep->com.qp, mask, &attrs, 1);
1189 if (err)
1190 goto err;
1191
1192 /*
1193 * If responder's RTR requirement did not match with what initiator
1194 * supports, generate TERM message
1195 */
1196 if (rtr_mismatch) {
1197 printk(KERN_ERR "%s: RTR mismatch, sending TERM\n", __func__);
1198 attrs.layer_etype = LAYER_MPA | DDP_LLP;
1199 attrs.ecode = MPA_NOMATCH_RTR;
1200 attrs.next_state = C4IW_QP_STATE_TERMINATE;
1201 err = c4iw_modify_qp(ep->com.qp->rhp, ep->com.qp,
1202 C4IW_QP_ATTR_NEXT_STATE, &attrs, 0);
1203 err = -ENOMEM;
1204 goto out;
1205 }
1206
1207 /*
1208 * Generate TERM if initiator IRD is not sufficient for responder
1209 * provided ORD. Currently, we do the same behaviour even when
1210 * responder provided IRD is also not sufficient as regards to
1211 * initiator ORD.
1212 */
1213 if (insuff_ird) {
1214 printk(KERN_ERR "%s: Insufficient IRD, sending TERM\n",
1215 __func__);
1216 attrs.layer_etype = LAYER_MPA | DDP_LLP;
1217 attrs.ecode = MPA_INSUFF_IRD;
1218 attrs.next_state = C4IW_QP_STATE_TERMINATE;
1219 err = c4iw_modify_qp(ep->com.qp->rhp, ep->com.qp,
1220 C4IW_QP_ATTR_NEXT_STATE, &attrs, 0);
1221 err = -ENOMEM;
1222 goto out;
1223 }
1224 goto out;
1225 err:
1226 state_set(&ep->com, ABORTING);
1227 send_abort(ep, skb, GFP_KERNEL);
1228 out:
1229 connect_reply_upcall(ep, err);
1230 return;
1231 }
1232
1233 static void process_mpa_request(struct c4iw_ep *ep, struct sk_buff *skb)
1234 {
1235 struct mpa_message *mpa;
1236 struct mpa_v2_conn_params *mpa_v2_params;
1237 u16 plen;
1238
1239 PDBG("%s ep %p tid %u\n", __func__, ep, ep->hwtid);
1240
1241 if (state_read(&ep->com) != MPA_REQ_WAIT)
1242 return;
1243
1244 /*
1245 * If we get more than the supported amount of private data
1246 * then we must fail this connection.
1247 */
1248 if (ep->mpa_pkt_len + skb->len > sizeof(ep->mpa_pkt)) {
1249 stop_ep_timer(ep);
1250 abort_connection(ep, skb, GFP_KERNEL);
1251 return;
1252 }
1253
1254 PDBG("%s enter (%s line %u)\n", __func__, __FILE__, __LINE__);
1255
1256 /*
1257 * Copy the new data into our accumulation buffer.
1258 */
1259 skb_copy_from_linear_data(skb, &(ep->mpa_pkt[ep->mpa_pkt_len]),
1260 skb->len);
1261 ep->mpa_pkt_len += skb->len;
1262
1263 /*
1264 * If we don't even have the mpa message, then bail.
1265 * We'll continue process when more data arrives.
1266 */
1267 if (ep->mpa_pkt_len < sizeof(*mpa))
1268 return;
1269
1270 PDBG("%s enter (%s line %u)\n", __func__, __FILE__, __LINE__);
1271 stop_ep_timer(ep);
1272 mpa = (struct mpa_message *) ep->mpa_pkt;
1273
1274 /*
1275 * Validate MPA Header.
1276 */
1277 if (mpa->revision > mpa_rev) {
1278 printk(KERN_ERR MOD "%s MPA version mismatch. Local = %d,"
1279 " Received = %d\n", __func__, mpa_rev, mpa->revision);
1280 abort_connection(ep, skb, GFP_KERNEL);
1281 return;
1282 }
1283
1284 if (memcmp(mpa->key, MPA_KEY_REQ, sizeof(mpa->key))) {
1285 abort_connection(ep, skb, GFP_KERNEL);
1286 return;
1287 }
1288
1289 plen = ntohs(mpa->private_data_size);
1290
1291 /*
1292 * Fail if there's too much private data.
1293 */
1294 if (plen > MPA_MAX_PRIVATE_DATA) {
1295 abort_connection(ep, skb, GFP_KERNEL);
1296 return;
1297 }
1298
1299 /*
1300 * If plen does not account for pkt size
1301 */
1302 if (ep->mpa_pkt_len > (sizeof(*mpa) + plen)) {
1303 abort_connection(ep, skb, GFP_KERNEL);
1304 return;
1305 }
1306 ep->plen = (u8) plen;
1307
1308 /*
1309 * If we don't have all the pdata yet, then bail.
1310 */
1311 if (ep->mpa_pkt_len < (sizeof(*mpa) + plen))
1312 return;
1313
1314 /*
1315 * If we get here we have accumulated the entire mpa
1316 * start reply message including private data.
1317 */
1318 ep->mpa_attr.initiator = 0;
1319 ep->mpa_attr.crc_enabled = (mpa->flags & MPA_CRC) | crc_enabled ? 1 : 0;
1320 ep->mpa_attr.recv_marker_enabled = markers_enabled;
1321 ep->mpa_attr.xmit_marker_enabled = mpa->flags & MPA_MARKERS ? 1 : 0;
1322 ep->mpa_attr.version = mpa->revision;
1323 if (mpa->revision == 1)
1324 ep->tried_with_mpa_v1 = 1;
1325 ep->mpa_attr.p2p_type = FW_RI_INIT_P2PTYPE_DISABLED;
1326
1327 if (mpa->revision == 2) {
1328 ep->mpa_attr.enhanced_rdma_conn =
1329 mpa->flags & MPA_ENHANCED_RDMA_CONN ? 1 : 0;
1330 if (ep->mpa_attr.enhanced_rdma_conn) {
1331 mpa_v2_params = (struct mpa_v2_conn_params *)
1332 (ep->mpa_pkt + sizeof(*mpa));
1333 ep->ird = ntohs(mpa_v2_params->ird) &
1334 MPA_V2_IRD_ORD_MASK;
1335 ep->ord = ntohs(mpa_v2_params->ord) &
1336 MPA_V2_IRD_ORD_MASK;
1337 if (ntohs(mpa_v2_params->ird) & MPA_V2_PEER2PEER_MODEL)
1338 if (peer2peer) {
1339 if (ntohs(mpa_v2_params->ord) &
1340 MPA_V2_RDMA_WRITE_RTR)
1341 ep->mpa_attr.p2p_type =
1342 FW_RI_INIT_P2PTYPE_RDMA_WRITE;
1343 else if (ntohs(mpa_v2_params->ord) &
1344 MPA_V2_RDMA_READ_RTR)
1345 ep->mpa_attr.p2p_type =
1346 FW_RI_INIT_P2PTYPE_READ_REQ;
1347 }
1348 }
1349 } else if (mpa->revision == 1)
1350 if (peer2peer)
1351 ep->mpa_attr.p2p_type = p2p_type;
1352
1353 PDBG("%s - crc_enabled=%d, recv_marker_enabled=%d, "
1354 "xmit_marker_enabled=%d, version=%d p2p_type=%d\n", __func__,
1355 ep->mpa_attr.crc_enabled, ep->mpa_attr.recv_marker_enabled,
1356 ep->mpa_attr.xmit_marker_enabled, ep->mpa_attr.version,
1357 ep->mpa_attr.p2p_type);
1358
1359 state_set(&ep->com, MPA_REQ_RCVD);
1360
1361 /* drive upcall */
1362 connect_request_upcall(ep);
1363 return;
1364 }
1365
1366 static int rx_data(struct c4iw_dev *dev, struct sk_buff *skb)
1367 {
1368 struct c4iw_ep *ep;
1369 struct cpl_rx_data *hdr = cplhdr(skb);
1370 unsigned int dlen = ntohs(hdr->len);
1371 unsigned int tid = GET_TID(hdr);
1372 struct tid_info *t = dev->rdev.lldi.tids;
1373
1374 ep = lookup_tid(t, tid);
1375 PDBG("%s ep %p tid %u dlen %u\n", __func__, ep, ep->hwtid, dlen);
1376 skb_pull(skb, sizeof(*hdr));
1377 skb_trim(skb, dlen);
1378
1379 ep->rcv_seq += dlen;
1380 BUG_ON(ep->rcv_seq != (ntohl(hdr->seq) + dlen));
1381
1382 /* update RX credits */
1383 update_rx_credits(ep, dlen);
1384
1385 switch (state_read(&ep->com)) {
1386 case MPA_REQ_SENT:
1387 process_mpa_reply(ep, skb);
1388 break;
1389 case MPA_REQ_WAIT:
1390 process_mpa_request(ep, skb);
1391 break;
1392 case MPA_REP_SENT:
1393 break;
1394 default:
1395 printk(KERN_ERR MOD "%s Unexpected streaming data."
1396 " ep %p state %d tid %u\n",
1397 __func__, ep, state_read(&ep->com), ep->hwtid);
1398
1399 /*
1400 * The ep will timeout and inform the ULP of the failure.
1401 * See ep_timeout().
1402 */
1403 break;
1404 }
1405 return 0;
1406 }
1407
1408 static int abort_rpl(struct c4iw_dev *dev, struct sk_buff *skb)
1409 {
1410 struct c4iw_ep *ep;
1411 struct cpl_abort_rpl_rss *rpl = cplhdr(skb);
1412 int release = 0;
1413 unsigned int tid = GET_TID(rpl);
1414 struct tid_info *t = dev->rdev.lldi.tids;
1415
1416 ep = lookup_tid(t, tid);
1417 if (!ep) {
1418 printk(KERN_WARNING MOD "Abort rpl to freed endpoint\n");
1419 return 0;
1420 }
1421 PDBG("%s ep %p tid %u\n", __func__, ep, ep->hwtid);
1422 mutex_lock(&ep->com.mutex);
1423 switch (ep->com.state) {
1424 case ABORTING:
1425 __state_set(&ep->com, DEAD);
1426 release = 1;
1427 break;
1428 default:
1429 printk(KERN_ERR "%s ep %p state %d\n",
1430 __func__, ep, ep->com.state);
1431 break;
1432 }
1433 mutex_unlock(&ep->com.mutex);
1434
1435 if (release)
1436 release_ep_resources(ep);
1437 return 0;
1438 }
1439
1440 static void send_fw_act_open_req(struct c4iw_ep *ep, unsigned int atid)
1441 {
1442 struct sk_buff *skb;
1443 struct fw_ofld_connection_wr *req;
1444 unsigned int mtu_idx;
1445 int wscale;
1446
1447 skb = get_skb(NULL, sizeof(*req), GFP_KERNEL);
1448 req = (struct fw_ofld_connection_wr *)__skb_put(skb, sizeof(*req));
1449 memset(req, 0, sizeof(*req));
1450 req->op_compl = htonl(V_WR_OP(FW_OFLD_CONNECTION_WR));
1451 req->len16_pkd = htonl(FW_WR_LEN16(DIV_ROUND_UP(sizeof(*req), 16)));
1452 req->le.filter = cpu_to_be32(select_ntuple(ep->com.dev, ep->dst,
1453 ep->l2t));
1454 req->le.lport = ep->com.local_addr.sin_port;
1455 req->le.pport = ep->com.remote_addr.sin_port;
1456 req->le.u.ipv4.lip = ep->com.local_addr.sin_addr.s_addr;
1457 req->le.u.ipv4.pip = ep->com.remote_addr.sin_addr.s_addr;
1458 req->tcb.t_state_to_astid =
1459 htonl(V_FW_OFLD_CONNECTION_WR_T_STATE(TCP_SYN_SENT) |
1460 V_FW_OFLD_CONNECTION_WR_ASTID(atid));
1461 req->tcb.cplrxdataack_cplpassacceptrpl =
1462 htons(F_FW_OFLD_CONNECTION_WR_CPLRXDATAACK);
1463 req->tcb.tx_max = jiffies;
1464 cxgb4_best_mtu(ep->com.dev->rdev.lldi.mtus, ep->mtu, &mtu_idx);
1465 wscale = compute_wscale(rcv_win);
1466 req->tcb.opt0 = TCAM_BYPASS(1) |
1467 (nocong ? NO_CONG(1) : 0) |
1468 KEEP_ALIVE(1) |
1469 DELACK(1) |
1470 WND_SCALE(wscale) |
1471 MSS_IDX(mtu_idx) |
1472 L2T_IDX(ep->l2t->idx) |
1473 TX_CHAN(ep->tx_chan) |
1474 SMAC_SEL(ep->smac_idx) |
1475 DSCP(ep->tos) |
1476 ULP_MODE(ULP_MODE_TCPDDP) |
1477 RCV_BUFSIZ(rcv_win >> 10);
1478 req->tcb.opt2 = PACE(1) |
1479 TX_QUEUE(ep->com.dev->rdev.lldi.tx_modq[ep->tx_chan]) |
1480 RX_CHANNEL(0) |
1481 CCTRL_ECN(enable_ecn) |
1482 RSS_QUEUE_VALID | RSS_QUEUE(ep->rss_qid);
1483 if (enable_tcp_timestamps)
1484 req->tcb.opt2 |= TSTAMPS_EN(1);
1485 if (enable_tcp_sack)
1486 req->tcb.opt2 |= SACK_EN(1);
1487 if (wscale && enable_tcp_window_scaling)
1488 req->tcb.opt2 |= WND_SCALE_EN(1);
1489 req->tcb.opt0 = cpu_to_be64(req->tcb.opt0);
1490 req->tcb.opt2 = cpu_to_be32(req->tcb.opt2);
1491 set_wr_txq(skb, CPL_PRIORITY_CONTROL, 0);
1492 c4iw_l2t_send(&ep->com.dev->rdev, skb, ep->l2t);
1493 }
1494
1495 /*
1496 * Return whether a failed active open has allocated a TID
1497 */
1498 static inline int act_open_has_tid(int status)
1499 {
1500 return status != CPL_ERR_TCAM_FULL && status != CPL_ERR_CONN_EXIST &&
1501 status != CPL_ERR_ARP_MISS;
1502 }
1503
1504 static int act_open_rpl(struct c4iw_dev *dev, struct sk_buff *skb)
1505 {
1506 struct c4iw_ep *ep;
1507 struct cpl_act_open_rpl *rpl = cplhdr(skb);
1508 unsigned int atid = GET_TID_TID(GET_AOPEN_ATID(
1509 ntohl(rpl->atid_status)));
1510 struct tid_info *t = dev->rdev.lldi.tids;
1511 int status = GET_AOPEN_STATUS(ntohl(rpl->atid_status));
1512
1513 ep = lookup_atid(t, atid);
1514
1515 PDBG("%s ep %p atid %u status %u errno %d\n", __func__, ep, atid,
1516 status, status2errno(status));
1517
1518 if (status == CPL_ERR_RTX_NEG_ADVICE) {
1519 printk(KERN_WARNING MOD "Connection problems for atid %u\n",
1520 atid);
1521 return 0;
1522 }
1523
1524 /*
1525 * Log interesting failures.
1526 */
1527 switch (status) {
1528 case CPL_ERR_CONN_RESET:
1529 case CPL_ERR_CONN_TIMEDOUT:
1530 break;
1531 case CPL_ERR_TCAM_FULL:
1532 mutex_lock(&dev->rdev.stats.lock);
1533 dev->rdev.stats.tcam_full++;
1534 mutex_unlock(&dev->rdev.stats.lock);
1535 send_fw_act_open_req(ep,
1536 GET_TID_TID(GET_AOPEN_ATID(ntohl(rpl->atid_status))));
1537 return 0;
1538 break;
1539 default:
1540 printk(KERN_INFO MOD "Active open failure - "
1541 "atid %u status %u errno %d %pI4:%u->%pI4:%u\n",
1542 atid, status, status2errno(status),
1543 &ep->com.local_addr.sin_addr.s_addr,
1544 ntohs(ep->com.local_addr.sin_port),
1545 &ep->com.remote_addr.sin_addr.s_addr,
1546 ntohs(ep->com.remote_addr.sin_port));
1547 break;
1548 }
1549
1550 connect_reply_upcall(ep, status2errno(status));
1551 state_set(&ep->com, DEAD);
1552
1553 if (status && act_open_has_tid(status))
1554 cxgb4_remove_tid(ep->com.dev->rdev.lldi.tids, 0, GET_TID(rpl));
1555
1556 cxgb4_free_atid(t, atid);
1557 dst_release(ep->dst);
1558 cxgb4_l2t_release(ep->l2t);
1559 c4iw_put_ep(&ep->com);
1560
1561 return 0;
1562 }
1563
1564 static int pass_open_rpl(struct c4iw_dev *dev, struct sk_buff *skb)
1565 {
1566 struct cpl_pass_open_rpl *rpl = cplhdr(skb);
1567 struct tid_info *t = dev->rdev.lldi.tids;
1568 unsigned int stid = GET_TID(rpl);
1569 struct c4iw_listen_ep *ep = lookup_stid(t, stid);
1570
1571 if (!ep) {
1572 printk(KERN_ERR MOD "stid %d lookup failure!\n", stid);
1573 return 0;
1574 }
1575 PDBG("%s ep %p status %d error %d\n", __func__, ep,
1576 rpl->status, status2errno(rpl->status));
1577 c4iw_wake_up(&ep->com.wr_wait, status2errno(rpl->status));
1578
1579 return 0;
1580 }
1581
1582 static int listen_stop(struct c4iw_listen_ep *ep)
1583 {
1584 struct sk_buff *skb;
1585 struct cpl_close_listsvr_req *req;
1586
1587 PDBG("%s ep %p\n", __func__, ep);
1588 skb = get_skb(NULL, sizeof(*req), GFP_KERNEL);
1589 if (!skb) {
1590 printk(KERN_ERR MOD "%s - failed to alloc skb\n", __func__);
1591 return -ENOMEM;
1592 }
1593 req = (struct cpl_close_listsvr_req *) skb_put(skb, sizeof(*req));
1594 INIT_TP_WR(req, 0);
1595 OPCODE_TID(req) = cpu_to_be32(MK_OPCODE_TID(CPL_CLOSE_LISTSRV_REQ,
1596 ep->stid));
1597 req->reply_ctrl = cpu_to_be16(
1598 QUEUENO(ep->com.dev->rdev.lldi.rxq_ids[0]));
1599 set_wr_txq(skb, CPL_PRIORITY_SETUP, 0);
1600 return c4iw_ofld_send(&ep->com.dev->rdev, skb);
1601 }
1602
1603 static int close_listsrv_rpl(struct c4iw_dev *dev, struct sk_buff *skb)
1604 {
1605 struct cpl_close_listsvr_rpl *rpl = cplhdr(skb);
1606 struct tid_info *t = dev->rdev.lldi.tids;
1607 unsigned int stid = GET_TID(rpl);
1608 struct c4iw_listen_ep *ep = lookup_stid(t, stid);
1609
1610 PDBG("%s ep %p\n", __func__, ep);
1611 c4iw_wake_up(&ep->com.wr_wait, status2errno(rpl->status));
1612 return 0;
1613 }
1614
1615 static void accept_cr(struct c4iw_ep *ep, __be32 peer_ip, struct sk_buff *skb,
1616 struct cpl_pass_accept_req *req)
1617 {
1618 struct cpl_pass_accept_rpl *rpl;
1619 unsigned int mtu_idx;
1620 u64 opt0;
1621 u32 opt2;
1622 int wscale;
1623
1624 PDBG("%s ep %p tid %u\n", __func__, ep, ep->hwtid);
1625 BUG_ON(skb_cloned(skb));
1626 skb_trim(skb, sizeof(*rpl));
1627 skb_get(skb);
1628 cxgb4_best_mtu(ep->com.dev->rdev.lldi.mtus, ep->mtu, &mtu_idx);
1629 wscale = compute_wscale(rcv_win);
1630 opt0 = (nocong ? NO_CONG(1) : 0) |
1631 KEEP_ALIVE(1) |
1632 DELACK(1) |
1633 WND_SCALE(wscale) |
1634 MSS_IDX(mtu_idx) |
1635 L2T_IDX(ep->l2t->idx) |
1636 TX_CHAN(ep->tx_chan) |
1637 SMAC_SEL(ep->smac_idx) |
1638 DSCP(ep->tos >> 2) |
1639 ULP_MODE(ULP_MODE_TCPDDP) |
1640 RCV_BUFSIZ(rcv_win>>10);
1641 opt2 = RX_CHANNEL(0) |
1642 RSS_QUEUE_VALID | RSS_QUEUE(ep->rss_qid);
1643
1644 if (enable_tcp_timestamps && req->tcpopt.tstamp)
1645 opt2 |= TSTAMPS_EN(1);
1646 if (enable_tcp_sack && req->tcpopt.sack)
1647 opt2 |= SACK_EN(1);
1648 if (wscale && enable_tcp_window_scaling)
1649 opt2 |= WND_SCALE_EN(1);
1650 if (enable_ecn) {
1651 const struct tcphdr *tcph;
1652 u32 hlen = ntohl(req->hdr_len);
1653
1654 tcph = (const void *)(req + 1) + G_ETH_HDR_LEN(hlen) +
1655 G_IP_HDR_LEN(hlen);
1656 if (tcph->ece && tcph->cwr)
1657 opt2 |= CCTRL_ECN(1);
1658 }
1659
1660 rpl = cplhdr(skb);
1661 INIT_TP_WR(rpl, ep->hwtid);
1662 OPCODE_TID(rpl) = cpu_to_be32(MK_OPCODE_TID(CPL_PASS_ACCEPT_RPL,
1663 ep->hwtid));
1664 rpl->opt0 = cpu_to_be64(opt0);
1665 rpl->opt2 = cpu_to_be32(opt2);
1666 set_wr_txq(skb, CPL_PRIORITY_SETUP, ep->ctrlq_idx);
1667 c4iw_l2t_send(&ep->com.dev->rdev, skb, ep->l2t);
1668
1669 return;
1670 }
1671
1672 static void reject_cr(struct c4iw_dev *dev, u32 hwtid, __be32 peer_ip,
1673 struct sk_buff *skb)
1674 {
1675 PDBG("%s c4iw_dev %p tid %u peer_ip %x\n", __func__, dev, hwtid,
1676 peer_ip);
1677 BUG_ON(skb_cloned(skb));
1678 skb_trim(skb, sizeof(struct cpl_tid_release));
1679 skb_get(skb);
1680 release_tid(&dev->rdev, hwtid, skb);
1681 return;
1682 }
1683
1684 static void get_4tuple(struct cpl_pass_accept_req *req,
1685 __be32 *local_ip, __be32 *peer_ip,
1686 __be16 *local_port, __be16 *peer_port)
1687 {
1688 int eth_len = G_ETH_HDR_LEN(be32_to_cpu(req->hdr_len));
1689 int ip_len = G_IP_HDR_LEN(be32_to_cpu(req->hdr_len));
1690 struct iphdr *ip = (struct iphdr *)((u8 *)(req + 1) + eth_len);
1691 struct tcphdr *tcp = (struct tcphdr *)
1692 ((u8 *)(req + 1) + eth_len + ip_len);
1693
1694 PDBG("%s saddr 0x%x daddr 0x%x sport %u dport %u\n", __func__,
1695 ntohl(ip->saddr), ntohl(ip->daddr), ntohs(tcp->source),
1696 ntohs(tcp->dest));
1697
1698 *peer_ip = ip->saddr;
1699 *local_ip = ip->daddr;
1700 *peer_port = tcp->source;
1701 *local_port = tcp->dest;
1702
1703 return;
1704 }
1705
1706 static int import_ep(struct c4iw_ep *ep, __be32 peer_ip, struct dst_entry *dst,
1707 struct c4iw_dev *cdev, bool clear_mpa_v1)
1708 {
1709 struct neighbour *n;
1710 int err, step;
1711
1712 n = dst_neigh_lookup(dst, &peer_ip);
1713 if (!n)
1714 return -ENODEV;
1715
1716 rcu_read_lock();
1717 err = -ENOMEM;
1718 if (n->dev->flags & IFF_LOOPBACK) {
1719 struct net_device *pdev;
1720
1721 pdev = ip_dev_find(&init_net, peer_ip);
1722 if (!pdev) {
1723 err = -ENODEV;
1724 goto out;
1725 }
1726 ep->l2t = cxgb4_l2t_get(cdev->rdev.lldi.l2t,
1727 n, pdev, 0);
1728 if (!ep->l2t)
1729 goto out;
1730 ep->mtu = pdev->mtu;
1731 ep->tx_chan = cxgb4_port_chan(pdev);
1732 ep->smac_idx = (cxgb4_port_viid(pdev) & 0x7F) << 1;
1733 step = cdev->rdev.lldi.ntxq /
1734 cdev->rdev.lldi.nchan;
1735 ep->txq_idx = cxgb4_port_idx(pdev) * step;
1736 step = cdev->rdev.lldi.nrxq /
1737 cdev->rdev.lldi.nchan;
1738 ep->ctrlq_idx = cxgb4_port_idx(pdev);
1739 ep->rss_qid = cdev->rdev.lldi.rxq_ids[
1740 cxgb4_port_idx(pdev) * step];
1741 dev_put(pdev);
1742 } else {
1743 ep->l2t = cxgb4_l2t_get(cdev->rdev.lldi.l2t,
1744 n, n->dev, 0);
1745 if (!ep->l2t)
1746 goto out;
1747 ep->mtu = dst_mtu(dst);
1748 ep->tx_chan = cxgb4_port_chan(n->dev);
1749 ep->smac_idx = (cxgb4_port_viid(n->dev) & 0x7F) << 1;
1750 step = cdev->rdev.lldi.ntxq /
1751 cdev->rdev.lldi.nchan;
1752 ep->txq_idx = cxgb4_port_idx(n->dev) * step;
1753 ep->ctrlq_idx = cxgb4_port_idx(n->dev);
1754 step = cdev->rdev.lldi.nrxq /
1755 cdev->rdev.lldi.nchan;
1756 ep->rss_qid = cdev->rdev.lldi.rxq_ids[
1757 cxgb4_port_idx(n->dev) * step];
1758
1759 if (clear_mpa_v1) {
1760 ep->retry_with_mpa_v1 = 0;
1761 ep->tried_with_mpa_v1 = 0;
1762 }
1763 }
1764 err = 0;
1765 out:
1766 rcu_read_unlock();
1767
1768 neigh_release(n);
1769
1770 return err;
1771 }
1772
1773 static int pass_accept_req(struct c4iw_dev *dev, struct sk_buff *skb)
1774 {
1775 struct c4iw_ep *child_ep, *parent_ep;
1776 struct cpl_pass_accept_req *req = cplhdr(skb);
1777 unsigned int stid = GET_POPEN_TID(ntohl(req->tos_stid));
1778 struct tid_info *t = dev->rdev.lldi.tids;
1779 unsigned int hwtid = GET_TID(req);
1780 struct dst_entry *dst;
1781 struct rtable *rt;
1782 __be32 local_ip, peer_ip;
1783 __be16 local_port, peer_port;
1784 int err;
1785
1786 parent_ep = lookup_stid(t, stid);
1787 PDBG("%s parent ep %p tid %u\n", __func__, parent_ep, hwtid);
1788
1789 get_4tuple(req, &local_ip, &peer_ip, &local_port, &peer_port);
1790
1791 if (state_read(&parent_ep->com) != LISTEN) {
1792 printk(KERN_ERR "%s - listening ep not in LISTEN\n",
1793 __func__);
1794 goto reject;
1795 }
1796
1797 /* Find output route */
1798 rt = find_route(dev, local_ip, peer_ip, local_port, peer_port,
1799 GET_POPEN_TOS(ntohl(req->tos_stid)));
1800 if (!rt) {
1801 printk(KERN_ERR MOD "%s - failed to find dst entry!\n",
1802 __func__);
1803 goto reject;
1804 }
1805 dst = &rt->dst;
1806
1807 child_ep = alloc_ep(sizeof(*child_ep), GFP_KERNEL);
1808 if (!child_ep) {
1809 printk(KERN_ERR MOD "%s - failed to allocate ep entry!\n",
1810 __func__);
1811 dst_release(dst);
1812 goto reject;
1813 }
1814
1815 err = import_ep(child_ep, peer_ip, dst, dev, false);
1816 if (err) {
1817 printk(KERN_ERR MOD "%s - failed to allocate l2t entry!\n",
1818 __func__);
1819 dst_release(dst);
1820 kfree(child_ep);
1821 goto reject;
1822 }
1823
1824 state_set(&child_ep->com, CONNECTING);
1825 child_ep->com.dev = dev;
1826 child_ep->com.cm_id = NULL;
1827 child_ep->com.local_addr.sin_family = PF_INET;
1828 child_ep->com.local_addr.sin_port = local_port;
1829 child_ep->com.local_addr.sin_addr.s_addr = local_ip;
1830 child_ep->com.remote_addr.sin_family = PF_INET;
1831 child_ep->com.remote_addr.sin_port = peer_port;
1832 child_ep->com.remote_addr.sin_addr.s_addr = peer_ip;
1833 c4iw_get_ep(&parent_ep->com);
1834 child_ep->parent_ep = parent_ep;
1835 child_ep->tos = GET_POPEN_TOS(ntohl(req->tos_stid));
1836 child_ep->dst = dst;
1837 child_ep->hwtid = hwtid;
1838
1839 PDBG("%s tx_chan %u smac_idx %u rss_qid %u\n", __func__,
1840 child_ep->tx_chan, child_ep->smac_idx, child_ep->rss_qid);
1841
1842 init_timer(&child_ep->timer);
1843 cxgb4_insert_tid(t, child_ep, hwtid);
1844 accept_cr(child_ep, peer_ip, skb, req);
1845 goto out;
1846 reject:
1847 reject_cr(dev, hwtid, peer_ip, skb);
1848 out:
1849 return 0;
1850 }
1851
1852 static int pass_establish(struct c4iw_dev *dev, struct sk_buff *skb)
1853 {
1854 struct c4iw_ep *ep;
1855 struct cpl_pass_establish *req = cplhdr(skb);
1856 struct tid_info *t = dev->rdev.lldi.tids;
1857 unsigned int tid = GET_TID(req);
1858
1859 ep = lookup_tid(t, tid);
1860 PDBG("%s ep %p tid %u\n", __func__, ep, ep->hwtid);
1861 ep->snd_seq = be32_to_cpu(req->snd_isn);
1862 ep->rcv_seq = be32_to_cpu(req->rcv_isn);
1863
1864 set_emss(ep, ntohs(req->tcp_opt));
1865
1866 dst_confirm(ep->dst);
1867 state_set(&ep->com, MPA_REQ_WAIT);
1868 start_ep_timer(ep);
1869 send_flowc(ep, skb);
1870
1871 return 0;
1872 }
1873
1874 static int peer_close(struct c4iw_dev *dev, struct sk_buff *skb)
1875 {
1876 struct cpl_peer_close *hdr = cplhdr(skb);
1877 struct c4iw_ep *ep;
1878 struct c4iw_qp_attributes attrs;
1879 int disconnect = 1;
1880 int release = 0;
1881 struct tid_info *t = dev->rdev.lldi.tids;
1882 unsigned int tid = GET_TID(hdr);
1883 int ret;
1884
1885 ep = lookup_tid(t, tid);
1886 PDBG("%s ep %p tid %u\n", __func__, ep, ep->hwtid);
1887 dst_confirm(ep->dst);
1888
1889 mutex_lock(&ep->com.mutex);
1890 switch (ep->com.state) {
1891 case MPA_REQ_WAIT:
1892 __state_set(&ep->com, CLOSING);
1893 break;
1894 case MPA_REQ_SENT:
1895 __state_set(&ep->com, CLOSING);
1896 connect_reply_upcall(ep, -ECONNRESET);
1897 break;
1898 case MPA_REQ_RCVD:
1899
1900 /*
1901 * We're gonna mark this puppy DEAD, but keep
1902 * the reference on it until the ULP accepts or
1903 * rejects the CR. Also wake up anyone waiting
1904 * in rdma connection migration (see c4iw_accept_cr()).
1905 */
1906 __state_set(&ep->com, CLOSING);
1907 PDBG("waking up ep %p tid %u\n", ep, ep->hwtid);
1908 c4iw_wake_up(&ep->com.wr_wait, -ECONNRESET);
1909 break;
1910 case MPA_REP_SENT:
1911 __state_set(&ep->com, CLOSING);
1912 PDBG("waking up ep %p tid %u\n", ep, ep->hwtid);
1913 c4iw_wake_up(&ep->com.wr_wait, -ECONNRESET);
1914 break;
1915 case FPDU_MODE:
1916 start_ep_timer(ep);
1917 __state_set(&ep->com, CLOSING);
1918 attrs.next_state = C4IW_QP_STATE_CLOSING;
1919 ret = c4iw_modify_qp(ep->com.qp->rhp, ep->com.qp,
1920 C4IW_QP_ATTR_NEXT_STATE, &attrs, 1);
1921 if (ret != -ECONNRESET) {
1922 peer_close_upcall(ep);
1923 disconnect = 1;
1924 }
1925 break;
1926 case ABORTING:
1927 disconnect = 0;
1928 break;
1929 case CLOSING:
1930 __state_set(&ep->com, MORIBUND);
1931 disconnect = 0;
1932 break;
1933 case MORIBUND:
1934 stop_ep_timer(ep);
1935 if (ep->com.cm_id && ep->com.qp) {
1936 attrs.next_state = C4IW_QP_STATE_IDLE;
1937 c4iw_modify_qp(ep->com.qp->rhp, ep->com.qp,
1938 C4IW_QP_ATTR_NEXT_STATE, &attrs, 1);
1939 }
1940 close_complete_upcall(ep);
1941 __state_set(&ep->com, DEAD);
1942 release = 1;
1943 disconnect = 0;
1944 break;
1945 case DEAD:
1946 disconnect = 0;
1947 break;
1948 default:
1949 BUG_ON(1);
1950 }
1951 mutex_unlock(&ep->com.mutex);
1952 if (disconnect)
1953 c4iw_ep_disconnect(ep, 0, GFP_KERNEL);
1954 if (release)
1955 release_ep_resources(ep);
1956 return 0;
1957 }
1958
1959 /*
1960 * Returns whether an ABORT_REQ_RSS message is a negative advice.
1961 */
1962 static int is_neg_adv_abort(unsigned int status)
1963 {
1964 return status == CPL_ERR_RTX_NEG_ADVICE ||
1965 status == CPL_ERR_PERSIST_NEG_ADVICE;
1966 }
1967
1968 static int c4iw_reconnect(struct c4iw_ep *ep)
1969 {
1970 struct rtable *rt;
1971 int err = 0;
1972
1973 PDBG("%s qp %p cm_id %p\n", __func__, ep->com.qp, ep->com.cm_id);
1974 init_timer(&ep->timer);
1975
1976 /*
1977 * Allocate an active TID to initiate a TCP connection.
1978 */
1979 ep->atid = cxgb4_alloc_atid(ep->com.dev->rdev.lldi.tids, ep);
1980 if (ep->atid == -1) {
1981 printk(KERN_ERR MOD "%s - cannot alloc atid.\n", __func__);
1982 err = -ENOMEM;
1983 goto fail2;
1984 }
1985
1986 /* find a route */
1987 rt = find_route(ep->com.dev,
1988 ep->com.cm_id->local_addr.sin_addr.s_addr,
1989 ep->com.cm_id->remote_addr.sin_addr.s_addr,
1990 ep->com.cm_id->local_addr.sin_port,
1991 ep->com.cm_id->remote_addr.sin_port, 0);
1992 if (!rt) {
1993 printk(KERN_ERR MOD "%s - cannot find route.\n", __func__);
1994 err = -EHOSTUNREACH;
1995 goto fail3;
1996 }
1997 ep->dst = &rt->dst;
1998
1999 err = import_ep(ep, ep->com.cm_id->remote_addr.sin_addr.s_addr,
2000 ep->dst, ep->com.dev, false);
2001 if (err) {
2002 printk(KERN_ERR MOD "%s - cannot alloc l2e.\n", __func__);
2003 goto fail4;
2004 }
2005
2006 PDBG("%s txq_idx %u tx_chan %u smac_idx %u rss_qid %u l2t_idx %u\n",
2007 __func__, ep->txq_idx, ep->tx_chan, ep->smac_idx, ep->rss_qid,
2008 ep->l2t->idx);
2009
2010 state_set(&ep->com, CONNECTING);
2011 ep->tos = 0;
2012
2013 /* send connect request to rnic */
2014 err = send_connect(ep);
2015 if (!err)
2016 goto out;
2017
2018 cxgb4_l2t_release(ep->l2t);
2019 fail4:
2020 dst_release(ep->dst);
2021 fail3:
2022 cxgb4_free_atid(ep->com.dev->rdev.lldi.tids, ep->atid);
2023 fail2:
2024 /*
2025 * remember to send notification to upper layer.
2026 * We are in here so the upper layer is not aware that this is
2027 * re-connect attempt and so, upper layer is still waiting for
2028 * response of 1st connect request.
2029 */
2030 connect_reply_upcall(ep, -ECONNRESET);
2031 c4iw_put_ep(&ep->com);
2032 out:
2033 return err;
2034 }
2035
2036 static int peer_abort(struct c4iw_dev *dev, struct sk_buff *skb)
2037 {
2038 struct cpl_abort_req_rss *req = cplhdr(skb);
2039 struct c4iw_ep *ep;
2040 struct cpl_abort_rpl *rpl;
2041 struct sk_buff *rpl_skb;
2042 struct c4iw_qp_attributes attrs;
2043 int ret;
2044 int release = 0;
2045 struct tid_info *t = dev->rdev.lldi.tids;
2046 unsigned int tid = GET_TID(req);
2047
2048 ep = lookup_tid(t, tid);
2049 if (is_neg_adv_abort(req->status)) {
2050 PDBG("%s neg_adv_abort ep %p tid %u\n", __func__, ep,
2051 ep->hwtid);
2052 return 0;
2053 }
2054 PDBG("%s ep %p tid %u state %u\n", __func__, ep, ep->hwtid,
2055 ep->com.state);
2056
2057 /*
2058 * Wake up any threads in rdma_init() or rdma_fini().
2059 * However, this is not needed if com state is just
2060 * MPA_REQ_SENT
2061 */
2062 if (ep->com.state != MPA_REQ_SENT)
2063 c4iw_wake_up(&ep->com.wr_wait, -ECONNRESET);
2064
2065 mutex_lock(&ep->com.mutex);
2066 switch (ep->com.state) {
2067 case CONNECTING:
2068 break;
2069 case MPA_REQ_WAIT:
2070 stop_ep_timer(ep);
2071 break;
2072 case MPA_REQ_SENT:
2073 stop_ep_timer(ep);
2074 if (mpa_rev == 2 && ep->tried_with_mpa_v1)
2075 connect_reply_upcall(ep, -ECONNRESET);
2076 else {
2077 /*
2078 * we just don't send notification upwards because we
2079 * want to retry with mpa_v1 without upper layers even
2080 * knowing it.
2081 *
2082 * do some housekeeping so as to re-initiate the
2083 * connection
2084 */
2085 PDBG("%s: mpa_rev=%d. Retrying with mpav1\n", __func__,
2086 mpa_rev);
2087 ep->retry_with_mpa_v1 = 1;
2088 }
2089 break;
2090 case MPA_REP_SENT:
2091 break;
2092 case MPA_REQ_RCVD:
2093 break;
2094 case MORIBUND:
2095 case CLOSING:
2096 stop_ep_timer(ep);
2097 /*FALLTHROUGH*/
2098 case FPDU_MODE:
2099 if (ep->com.cm_id && ep->com.qp) {
2100 attrs.next_state = C4IW_QP_STATE_ERROR;
2101 ret = c4iw_modify_qp(ep->com.qp->rhp,
2102 ep->com.qp, C4IW_QP_ATTR_NEXT_STATE,
2103 &attrs, 1);
2104 if (ret)
2105 printk(KERN_ERR MOD
2106 "%s - qp <- error failed!\n",
2107 __func__);
2108 }
2109 peer_abort_upcall(ep);
2110 break;
2111 case ABORTING:
2112 break;
2113 case DEAD:
2114 PDBG("%s PEER_ABORT IN DEAD STATE!!!!\n", __func__);
2115 mutex_unlock(&ep->com.mutex);
2116 return 0;
2117 default:
2118 BUG_ON(1);
2119 break;
2120 }
2121 dst_confirm(ep->dst);
2122 if (ep->com.state != ABORTING) {
2123 __state_set(&ep->com, DEAD);
2124 /* we don't release if we want to retry with mpa_v1 */
2125 if (!ep->retry_with_mpa_v1)
2126 release = 1;
2127 }
2128 mutex_unlock(&ep->com.mutex);
2129
2130 rpl_skb = get_skb(skb, sizeof(*rpl), GFP_KERNEL);
2131 if (!rpl_skb) {
2132 printk(KERN_ERR MOD "%s - cannot allocate skb!\n",
2133 __func__);
2134 release = 1;
2135 goto out;
2136 }
2137 set_wr_txq(skb, CPL_PRIORITY_DATA, ep->txq_idx);
2138 rpl = (struct cpl_abort_rpl *) skb_put(rpl_skb, sizeof(*rpl));
2139 INIT_TP_WR(rpl, ep->hwtid);
2140 OPCODE_TID(rpl) = cpu_to_be32(MK_OPCODE_TID(CPL_ABORT_RPL, ep->hwtid));
2141 rpl->cmd = CPL_ABORT_NO_RST;
2142 c4iw_ofld_send(&ep->com.dev->rdev, rpl_skb);
2143 out:
2144 if (release)
2145 release_ep_resources(ep);
2146
2147 /* retry with mpa-v1 */
2148 if (ep && ep->retry_with_mpa_v1) {
2149 cxgb4_remove_tid(ep->com.dev->rdev.lldi.tids, 0, ep->hwtid);
2150 dst_release(ep->dst);
2151 cxgb4_l2t_release(ep->l2t);
2152 c4iw_reconnect(ep);
2153 }
2154
2155 return 0;
2156 }
2157
2158 static int close_con_rpl(struct c4iw_dev *dev, struct sk_buff *skb)
2159 {
2160 struct c4iw_ep *ep;
2161 struct c4iw_qp_attributes attrs;
2162 struct cpl_close_con_rpl *rpl = cplhdr(skb);
2163 int release = 0;
2164 struct tid_info *t = dev->rdev.lldi.tids;
2165 unsigned int tid = GET_TID(rpl);
2166
2167 ep = lookup_tid(t, tid);
2168
2169 PDBG("%s ep %p tid %u\n", __func__, ep, ep->hwtid);
2170 BUG_ON(!ep);
2171
2172 /* The cm_id may be null if we failed to connect */
2173 mutex_lock(&ep->com.mutex);
2174 switch (ep->com.state) {
2175 case CLOSING:
2176 __state_set(&ep->com, MORIBUND);
2177 break;
2178 case MORIBUND:
2179 stop_ep_timer(ep);
2180 if ((ep->com.cm_id) && (ep->com.qp)) {
2181 attrs.next_state = C4IW_QP_STATE_IDLE;
2182 c4iw_modify_qp(ep->com.qp->rhp,
2183 ep->com.qp,
2184 C4IW_QP_ATTR_NEXT_STATE,
2185 &attrs, 1);
2186 }
2187 close_complete_upcall(ep);
2188 __state_set(&ep->com, DEAD);
2189 release = 1;
2190 break;
2191 case ABORTING:
2192 case DEAD:
2193 break;
2194 default:
2195 BUG_ON(1);
2196 break;
2197 }
2198 mutex_unlock(&ep->com.mutex);
2199 if (release)
2200 release_ep_resources(ep);
2201 return 0;
2202 }
2203
2204 static int terminate(struct c4iw_dev *dev, struct sk_buff *skb)
2205 {
2206 struct cpl_rdma_terminate *rpl = cplhdr(skb);
2207 struct tid_info *t = dev->rdev.lldi.tids;
2208 unsigned int tid = GET_TID(rpl);
2209 struct c4iw_ep *ep;
2210 struct c4iw_qp_attributes attrs;
2211
2212 ep = lookup_tid(t, tid);
2213 BUG_ON(!ep);
2214
2215 if (ep && ep->com.qp) {
2216 printk(KERN_WARNING MOD "TERM received tid %u qpid %u\n", tid,
2217 ep->com.qp->wq.sq.qid);
2218 attrs.next_state = C4IW_QP_STATE_TERMINATE;
2219 c4iw_modify_qp(ep->com.qp->rhp, ep->com.qp,
2220 C4IW_QP_ATTR_NEXT_STATE, &attrs, 1);
2221 } else
2222 printk(KERN_WARNING MOD "TERM received tid %u no ep/qp\n", tid);
2223
2224 return 0;
2225 }
2226
2227 /*
2228 * Upcall from the adapter indicating data has been transmitted.
2229 * For us its just the single MPA request or reply. We can now free
2230 * the skb holding the mpa message.
2231 */
2232 static int fw4_ack(struct c4iw_dev *dev, struct sk_buff *skb)
2233 {
2234 struct c4iw_ep *ep;
2235 struct cpl_fw4_ack *hdr = cplhdr(skb);
2236 u8 credits = hdr->credits;
2237 unsigned int tid = GET_TID(hdr);
2238 struct tid_info *t = dev->rdev.lldi.tids;
2239
2240
2241 ep = lookup_tid(t, tid);
2242 PDBG("%s ep %p tid %u credits %u\n", __func__, ep, ep->hwtid, credits);
2243 if (credits == 0) {
2244 PDBG("%s 0 credit ack ep %p tid %u state %u\n",
2245 __func__, ep, ep->hwtid, state_read(&ep->com));
2246 return 0;
2247 }
2248
2249 dst_confirm(ep->dst);
2250 if (ep->mpa_skb) {
2251 PDBG("%s last streaming msg ack ep %p tid %u state %u "
2252 "initiator %u freeing skb\n", __func__, ep, ep->hwtid,
2253 state_read(&ep->com), ep->mpa_attr.initiator ? 1 : 0);
2254 kfree_skb(ep->mpa_skb);
2255 ep->mpa_skb = NULL;
2256 }
2257 return 0;
2258 }
2259
2260 int c4iw_reject_cr(struct iw_cm_id *cm_id, const void *pdata, u8 pdata_len)
2261 {
2262 int err;
2263 struct c4iw_ep *ep = to_ep(cm_id);
2264 PDBG("%s ep %p tid %u\n", __func__, ep, ep->hwtid);
2265
2266 if (state_read(&ep->com) == DEAD) {
2267 c4iw_put_ep(&ep->com);
2268 return -ECONNRESET;
2269 }
2270 BUG_ON(state_read(&ep->com) != MPA_REQ_RCVD);
2271 if (mpa_rev == 0)
2272 abort_connection(ep, NULL, GFP_KERNEL);
2273 else {
2274 err = send_mpa_reject(ep, pdata, pdata_len);
2275 err = c4iw_ep_disconnect(ep, 0, GFP_KERNEL);
2276 }
2277 c4iw_put_ep(&ep->com);
2278 return 0;
2279 }
2280
2281 int c4iw_accept_cr(struct iw_cm_id *cm_id, struct iw_cm_conn_param *conn_param)
2282 {
2283 int err;
2284 struct c4iw_qp_attributes attrs;
2285 enum c4iw_qp_attr_mask mask;
2286 struct c4iw_ep *ep = to_ep(cm_id);
2287 struct c4iw_dev *h = to_c4iw_dev(cm_id->device);
2288 struct c4iw_qp *qp = get_qhp(h, conn_param->qpn);
2289
2290 PDBG("%s ep %p tid %u\n", __func__, ep, ep->hwtid);
2291 if (state_read(&ep->com) == DEAD) {
2292 err = -ECONNRESET;
2293 goto err;
2294 }
2295
2296 BUG_ON(state_read(&ep->com) != MPA_REQ_RCVD);
2297 BUG_ON(!qp);
2298
2299 if ((conn_param->ord > c4iw_max_read_depth) ||
2300 (conn_param->ird > c4iw_max_read_depth)) {
2301 abort_connection(ep, NULL, GFP_KERNEL);
2302 err = -EINVAL;
2303 goto err;
2304 }
2305
2306 if (ep->mpa_attr.version == 2 && ep->mpa_attr.enhanced_rdma_conn) {
2307 if (conn_param->ord > ep->ird) {
2308 ep->ird = conn_param->ird;
2309 ep->ord = conn_param->ord;
2310 send_mpa_reject(ep, conn_param->private_data,
2311 conn_param->private_data_len);
2312 abort_connection(ep, NULL, GFP_KERNEL);
2313 err = -ENOMEM;
2314 goto err;
2315 }
2316 if (conn_param->ird > ep->ord) {
2317 if (!ep->ord)
2318 conn_param->ird = 1;
2319 else {
2320 abort_connection(ep, NULL, GFP_KERNEL);
2321 err = -ENOMEM;
2322 goto err;
2323 }
2324 }
2325
2326 }
2327 ep->ird = conn_param->ird;
2328 ep->ord = conn_param->ord;
2329
2330 if (ep->mpa_attr.version != 2)
2331 if (peer2peer && ep->ird == 0)
2332 ep->ird = 1;
2333
2334 PDBG("%s %d ird %d ord %d\n", __func__, __LINE__, ep->ird, ep->ord);
2335
2336 cm_id->add_ref(cm_id);
2337 ep->com.cm_id = cm_id;
2338 ep->com.qp = qp;
2339
2340 /* bind QP to EP and move to RTS */
2341 attrs.mpa_attr = ep->mpa_attr;
2342 attrs.max_ird = ep->ird;
2343 attrs.max_ord = ep->ord;
2344 attrs.llp_stream_handle = ep;
2345 attrs.next_state = C4IW_QP_STATE_RTS;
2346
2347 /* bind QP and TID with INIT_WR */
2348 mask = C4IW_QP_ATTR_NEXT_STATE |
2349 C4IW_QP_ATTR_LLP_STREAM_HANDLE |
2350 C4IW_QP_ATTR_MPA_ATTR |
2351 C4IW_QP_ATTR_MAX_IRD |
2352 C4IW_QP_ATTR_MAX_ORD;
2353
2354 err = c4iw_modify_qp(ep->com.qp->rhp,
2355 ep->com.qp, mask, &attrs, 1);
2356 if (err)
2357 goto err1;
2358 err = send_mpa_reply(ep, conn_param->private_data,
2359 conn_param->private_data_len);
2360 if (err)
2361 goto err1;
2362
2363 state_set(&ep->com, FPDU_MODE);
2364 established_upcall(ep);
2365 c4iw_put_ep(&ep->com);
2366 return 0;
2367 err1:
2368 ep->com.cm_id = NULL;
2369 ep->com.qp = NULL;
2370 cm_id->rem_ref(cm_id);
2371 err:
2372 c4iw_put_ep(&ep->com);
2373 return err;
2374 }
2375
2376 int c4iw_connect(struct iw_cm_id *cm_id, struct iw_cm_conn_param *conn_param)
2377 {
2378 struct c4iw_dev *dev = to_c4iw_dev(cm_id->device);
2379 struct c4iw_ep *ep;
2380 struct rtable *rt;
2381 int err = 0;
2382
2383 if ((conn_param->ord > c4iw_max_read_depth) ||
2384 (conn_param->ird > c4iw_max_read_depth)) {
2385 err = -EINVAL;
2386 goto out;
2387 }
2388 ep = alloc_ep(sizeof(*ep), GFP_KERNEL);
2389 if (!ep) {
2390 printk(KERN_ERR MOD "%s - cannot alloc ep.\n", __func__);
2391 err = -ENOMEM;
2392 goto out;
2393 }
2394 init_timer(&ep->timer);
2395 ep->plen = conn_param->private_data_len;
2396 if (ep->plen)
2397 memcpy(ep->mpa_pkt + sizeof(struct mpa_message),
2398 conn_param->private_data, ep->plen);
2399 ep->ird = conn_param->ird;
2400 ep->ord = conn_param->ord;
2401
2402 if (peer2peer && ep->ord == 0)
2403 ep->ord = 1;
2404
2405 cm_id->add_ref(cm_id);
2406 ep->com.dev = dev;
2407 ep->com.cm_id = cm_id;
2408 ep->com.qp = get_qhp(dev, conn_param->qpn);
2409 BUG_ON(!ep->com.qp);
2410 PDBG("%s qpn 0x%x qp %p cm_id %p\n", __func__, conn_param->qpn,
2411 ep->com.qp, cm_id);
2412
2413 /*
2414 * Allocate an active TID to initiate a TCP connection.
2415 */
2416 ep->atid = cxgb4_alloc_atid(dev->rdev.lldi.tids, ep);
2417 if (ep->atid == -1) {
2418 printk(KERN_ERR MOD "%s - cannot alloc atid.\n", __func__);
2419 err = -ENOMEM;
2420 goto fail2;
2421 }
2422
2423 PDBG("%s saddr 0x%x sport 0x%x raddr 0x%x rport 0x%x\n", __func__,
2424 ntohl(cm_id->local_addr.sin_addr.s_addr),
2425 ntohs(cm_id->local_addr.sin_port),
2426 ntohl(cm_id->remote_addr.sin_addr.s_addr),
2427 ntohs(cm_id->remote_addr.sin_port));
2428
2429 /* find a route */
2430 rt = find_route(dev,
2431 cm_id->local_addr.sin_addr.s_addr,
2432 cm_id->remote_addr.sin_addr.s_addr,
2433 cm_id->local_addr.sin_port,
2434 cm_id->remote_addr.sin_port, 0);
2435 if (!rt) {
2436 printk(KERN_ERR MOD "%s - cannot find route.\n", __func__);
2437 err = -EHOSTUNREACH;
2438 goto fail3;
2439 }
2440 ep->dst = &rt->dst;
2441
2442 err = import_ep(ep, cm_id->remote_addr.sin_addr.s_addr,
2443 ep->dst, ep->com.dev, true);
2444 if (err) {
2445 printk(KERN_ERR MOD "%s - cannot alloc l2e.\n", __func__);
2446 goto fail4;
2447 }
2448
2449 PDBG("%s txq_idx %u tx_chan %u smac_idx %u rss_qid %u l2t_idx %u\n",
2450 __func__, ep->txq_idx, ep->tx_chan, ep->smac_idx, ep->rss_qid,
2451 ep->l2t->idx);
2452
2453 state_set(&ep->com, CONNECTING);
2454 ep->tos = 0;
2455 ep->com.local_addr = cm_id->local_addr;
2456 ep->com.remote_addr = cm_id->remote_addr;
2457
2458 /* send connect request to rnic */
2459 err = send_connect(ep);
2460 if (!err)
2461 goto out;
2462
2463 cxgb4_l2t_release(ep->l2t);
2464 fail4:
2465 dst_release(ep->dst);
2466 fail3:
2467 cxgb4_free_atid(ep->com.dev->rdev.lldi.tids, ep->atid);
2468 fail2:
2469 cm_id->rem_ref(cm_id);
2470 c4iw_put_ep(&ep->com);
2471 out:
2472 return err;
2473 }
2474
2475 int c4iw_create_listen(struct iw_cm_id *cm_id, int backlog)
2476 {
2477 int err = 0;
2478 struct c4iw_dev *dev = to_c4iw_dev(cm_id->device);
2479 struct c4iw_listen_ep *ep;
2480
2481
2482 might_sleep();
2483
2484 ep = alloc_ep(sizeof(*ep), GFP_KERNEL);
2485 if (!ep) {
2486 printk(KERN_ERR MOD "%s - cannot alloc ep.\n", __func__);
2487 err = -ENOMEM;
2488 goto fail1;
2489 }
2490 PDBG("%s ep %p\n", __func__, ep);
2491 cm_id->add_ref(cm_id);
2492 ep->com.cm_id = cm_id;
2493 ep->com.dev = dev;
2494 ep->backlog = backlog;
2495 ep->com.local_addr = cm_id->local_addr;
2496
2497 /*
2498 * Allocate a server TID.
2499 */
2500 ep->stid = cxgb4_alloc_stid(dev->rdev.lldi.tids, PF_INET, ep);
2501 if (ep->stid == -1) {
2502 printk(KERN_ERR MOD "%s - cannot alloc stid.\n", __func__);
2503 err = -ENOMEM;
2504 goto fail2;
2505 }
2506
2507 state_set(&ep->com, LISTEN);
2508 c4iw_init_wr_wait(&ep->com.wr_wait);
2509 err = cxgb4_create_server(ep->com.dev->rdev.lldi.ports[0], ep->stid,
2510 ep->com.local_addr.sin_addr.s_addr,
2511 ep->com.local_addr.sin_port,
2512 ep->com.dev->rdev.lldi.rxq_ids[0]);
2513 if (err)
2514 goto fail3;
2515
2516 /* wait for pass_open_rpl */
2517 err = c4iw_wait_for_reply(&ep->com.dev->rdev, &ep->com.wr_wait, 0, 0,
2518 __func__);
2519 if (!err) {
2520 cm_id->provider_data = ep;
2521 goto out;
2522 }
2523 fail3:
2524 cxgb4_free_stid(ep->com.dev->rdev.lldi.tids, ep->stid, PF_INET);
2525 fail2:
2526 cm_id->rem_ref(cm_id);
2527 c4iw_put_ep(&ep->com);
2528 fail1:
2529 out:
2530 return err;
2531 }
2532
2533 int c4iw_destroy_listen(struct iw_cm_id *cm_id)
2534 {
2535 int err;
2536 struct c4iw_listen_ep *ep = to_listen_ep(cm_id);
2537
2538 PDBG("%s ep %p\n", __func__, ep);
2539
2540 might_sleep();
2541 state_set(&ep->com, DEAD);
2542 c4iw_init_wr_wait(&ep->com.wr_wait);
2543 err = listen_stop(ep);
2544 if (err)
2545 goto done;
2546 err = c4iw_wait_for_reply(&ep->com.dev->rdev, &ep->com.wr_wait, 0, 0,
2547 __func__);
2548 cxgb4_free_stid(ep->com.dev->rdev.lldi.tids, ep->stid, PF_INET);
2549 done:
2550 cm_id->rem_ref(cm_id);
2551 c4iw_put_ep(&ep->com);
2552 return err;
2553 }
2554
2555 int c4iw_ep_disconnect(struct c4iw_ep *ep, int abrupt, gfp_t gfp)
2556 {
2557 int ret = 0;
2558 int close = 0;
2559 int fatal = 0;
2560 struct c4iw_rdev *rdev;
2561
2562 mutex_lock(&ep->com.mutex);
2563
2564 PDBG("%s ep %p state %s, abrupt %d\n", __func__, ep,
2565 states[ep->com.state], abrupt);
2566
2567 rdev = &ep->com.dev->rdev;
2568 if (c4iw_fatal_error(rdev)) {
2569 fatal = 1;
2570 close_complete_upcall(ep);
2571 ep->com.state = DEAD;
2572 }
2573 switch (ep->com.state) {
2574 case MPA_REQ_WAIT:
2575 case MPA_REQ_SENT:
2576 case MPA_REQ_RCVD:
2577 case MPA_REP_SENT:
2578 case FPDU_MODE:
2579 close = 1;
2580 if (abrupt)
2581 ep->com.state = ABORTING;
2582 else {
2583 ep->com.state = CLOSING;
2584 start_ep_timer(ep);
2585 }
2586 set_bit(CLOSE_SENT, &ep->com.flags);
2587 break;
2588 case CLOSING:
2589 if (!test_and_set_bit(CLOSE_SENT, &ep->com.flags)) {
2590 close = 1;
2591 if (abrupt) {
2592 stop_ep_timer(ep);
2593 ep->com.state = ABORTING;
2594 } else
2595 ep->com.state = MORIBUND;
2596 }
2597 break;
2598 case MORIBUND:
2599 case ABORTING:
2600 case DEAD:
2601 PDBG("%s ignoring disconnect ep %p state %u\n",
2602 __func__, ep, ep->com.state);
2603 break;
2604 default:
2605 BUG();
2606 break;
2607 }
2608
2609 if (close) {
2610 if (abrupt) {
2611 close_complete_upcall(ep);
2612 ret = send_abort(ep, NULL, gfp);
2613 } else
2614 ret = send_halfclose(ep, gfp);
2615 if (ret)
2616 fatal = 1;
2617 }
2618 mutex_unlock(&ep->com.mutex);
2619 if (fatal)
2620 release_ep_resources(ep);
2621 return ret;
2622 }
2623
2624 static int async_event(struct c4iw_dev *dev, struct sk_buff *skb)
2625 {
2626 struct cpl_fw6_msg *rpl = cplhdr(skb);
2627 c4iw_ev_dispatch(dev, (struct t4_cqe *)&rpl->data[0]);
2628 return 0;
2629 }
2630
2631 /*
2632 * These are the real handlers that are called from a
2633 * work queue.
2634 */
2635 static c4iw_handler_func work_handlers[NUM_CPL_CMDS] = {
2636 [CPL_ACT_ESTABLISH] = act_establish,
2637 [CPL_ACT_OPEN_RPL] = act_open_rpl,
2638 [CPL_RX_DATA] = rx_data,
2639 [CPL_ABORT_RPL_RSS] = abort_rpl,
2640 [CPL_ABORT_RPL] = abort_rpl,
2641 [CPL_PASS_OPEN_RPL] = pass_open_rpl,
2642 [CPL_CLOSE_LISTSRV_RPL] = close_listsrv_rpl,
2643 [CPL_PASS_ACCEPT_REQ] = pass_accept_req,
2644 [CPL_PASS_ESTABLISH] = pass_establish,
2645 [CPL_PEER_CLOSE] = peer_close,
2646 [CPL_ABORT_REQ_RSS] = peer_abort,
2647 [CPL_CLOSE_CON_RPL] = close_con_rpl,
2648 [CPL_RDMA_TERMINATE] = terminate,
2649 [CPL_FW4_ACK] = fw4_ack,
2650 [CPL_FW6_MSG] = async_event
2651 };
2652
2653 static void process_timeout(struct c4iw_ep *ep)
2654 {
2655 struct c4iw_qp_attributes attrs;
2656 int abort = 1;
2657
2658 mutex_lock(&ep->com.mutex);
2659 PDBG("%s ep %p tid %u state %d\n", __func__, ep, ep->hwtid,
2660 ep->com.state);
2661 switch (ep->com.state) {
2662 case MPA_REQ_SENT:
2663 __state_set(&ep->com, ABORTING);
2664 connect_reply_upcall(ep, -ETIMEDOUT);
2665 break;
2666 case MPA_REQ_WAIT:
2667 __state_set(&ep->com, ABORTING);
2668 break;
2669 case CLOSING:
2670 case MORIBUND:
2671 if (ep->com.cm_id && ep->com.qp) {
2672 attrs.next_state = C4IW_QP_STATE_ERROR;
2673 c4iw_modify_qp(ep->com.qp->rhp,
2674 ep->com.qp, C4IW_QP_ATTR_NEXT_STATE,
2675 &attrs, 1);
2676 }
2677 __state_set(&ep->com, ABORTING);
2678 break;
2679 default:
2680 WARN(1, "%s unexpected state ep %p tid %u state %u\n",
2681 __func__, ep, ep->hwtid, ep->com.state);
2682 abort = 0;
2683 }
2684 mutex_unlock(&ep->com.mutex);
2685 if (abort)
2686 abort_connection(ep, NULL, GFP_KERNEL);
2687 c4iw_put_ep(&ep->com);
2688 }
2689
2690 static void process_timedout_eps(void)
2691 {
2692 struct c4iw_ep *ep;
2693
2694 spin_lock_irq(&timeout_lock);
2695 while (!list_empty(&timeout_list)) {
2696 struct list_head *tmp;
2697
2698 tmp = timeout_list.next;
2699 list_del(tmp);
2700 spin_unlock_irq(&timeout_lock);
2701 ep = list_entry(tmp, struct c4iw_ep, entry);
2702 process_timeout(ep);
2703 spin_lock_irq(&timeout_lock);
2704 }
2705 spin_unlock_irq(&timeout_lock);
2706 }
2707
2708 static void process_work(struct work_struct *work)
2709 {
2710 struct sk_buff *skb = NULL;
2711 struct c4iw_dev *dev;
2712 struct cpl_act_establish *rpl;
2713 unsigned int opcode;
2714 int ret;
2715
2716 while ((skb = skb_dequeue(&rxq))) {
2717 rpl = cplhdr(skb);
2718 dev = *((struct c4iw_dev **) (skb->cb + sizeof(void *)));
2719 opcode = rpl->ot.opcode;
2720
2721 BUG_ON(!work_handlers[opcode]);
2722 ret = work_handlers[opcode](dev, skb);
2723 if (!ret)
2724 kfree_skb(skb);
2725 }
2726 process_timedout_eps();
2727 }
2728
2729 static DECLARE_WORK(skb_work, process_work);
2730
2731 static void ep_timeout(unsigned long arg)
2732 {
2733 struct c4iw_ep *ep = (struct c4iw_ep *)arg;
2734
2735 spin_lock(&timeout_lock);
2736 list_add_tail(&ep->entry, &timeout_list);
2737 spin_unlock(&timeout_lock);
2738 queue_work(workq, &skb_work);
2739 }
2740
2741 /*
2742 * All the CM events are handled on a work queue to have a safe context.
2743 */
2744 static int sched(struct c4iw_dev *dev, struct sk_buff *skb)
2745 {
2746
2747 /*
2748 * Save dev in the skb->cb area.
2749 */
2750 *((struct c4iw_dev **) (skb->cb + sizeof(void *))) = dev;
2751
2752 /*
2753 * Queue the skb and schedule the worker thread.
2754 */
2755 skb_queue_tail(&rxq, skb);
2756 queue_work(workq, &skb_work);
2757 return 0;
2758 }
2759
2760 static int set_tcb_rpl(struct c4iw_dev *dev, struct sk_buff *skb)
2761 {
2762 struct cpl_set_tcb_rpl *rpl = cplhdr(skb);
2763
2764 if (rpl->status != CPL_ERR_NONE) {
2765 printk(KERN_ERR MOD "Unexpected SET_TCB_RPL status %u "
2766 "for tid %u\n", rpl->status, GET_TID(rpl));
2767 }
2768 kfree_skb(skb);
2769 return 0;
2770 }
2771
2772 static int fw6_msg(struct c4iw_dev *dev, struct sk_buff *skb)
2773 {
2774 struct cpl_fw6_msg *rpl = cplhdr(skb);
2775 struct c4iw_wr_wait *wr_waitp;
2776 int ret;
2777 u8 opcode;
2778 struct cpl_fw6_msg_ofld_connection_wr_rpl *req;
2779 struct c4iw_ep *ep;
2780
2781 PDBG("%s type %u\n", __func__, rpl->type);
2782
2783 switch (rpl->type) {
2784 case FW6_TYPE_WR_RPL:
2785 ret = (int)((be64_to_cpu(rpl->data[0]) >> 8) & 0xff);
2786 wr_waitp = (struct c4iw_wr_wait *)(__force unsigned long) rpl->data[1];
2787 PDBG("%s wr_waitp %p ret %u\n", __func__, wr_waitp, ret);
2788 if (wr_waitp)
2789 c4iw_wake_up(wr_waitp, ret ? -ret : 0);
2790 kfree_skb(skb);
2791 break;
2792 case FW6_TYPE_CQE:
2793 sched(dev, skb);
2794 break;
2795 case FW6_TYPE_OFLD_CONNECTION_WR_RPL:
2796 opcode = *(const u8 *)rpl->data;
2797 if (opcode == FW_OFLD_CONNECTION_WR) {
2798 req =
2799 (struct cpl_fw6_msg_ofld_connection_wr_rpl *)rpl->data;
2800 if (req->t_state == TCP_SYN_SENT
2801 && (req->retval == FW_ENOMEM
2802 || req->retval == FW_EADDRINUSE)) {
2803 ep = (struct c4iw_ep *)
2804 lookup_atid(dev->rdev.lldi.tids,
2805 req->tid);
2806 c4iw_l2t_send(&dev->rdev, skb, ep->l2t);
2807 return 0;
2808 }
2809 }
2810 break;
2811 default:
2812 printk(KERN_ERR MOD "%s unexpected fw6 msg type %u\n", __func__,
2813 rpl->type);
2814 kfree_skb(skb);
2815 break;
2816 }
2817 return 0;
2818 }
2819
2820 static int peer_abort_intr(struct c4iw_dev *dev, struct sk_buff *skb)
2821 {
2822 struct cpl_abort_req_rss *req = cplhdr(skb);
2823 struct c4iw_ep *ep;
2824 struct tid_info *t = dev->rdev.lldi.tids;
2825 unsigned int tid = GET_TID(req);
2826
2827 ep = lookup_tid(t, tid);
2828 if (!ep) {
2829 printk(KERN_WARNING MOD
2830 "Abort on non-existent endpoint, tid %d\n", tid);
2831 kfree_skb(skb);
2832 return 0;
2833 }
2834 if (is_neg_adv_abort(req->status)) {
2835 PDBG("%s neg_adv_abort ep %p tid %u\n", __func__, ep,
2836 ep->hwtid);
2837 kfree_skb(skb);
2838 return 0;
2839 }
2840 PDBG("%s ep %p tid %u state %u\n", __func__, ep, ep->hwtid,
2841 ep->com.state);
2842
2843 /*
2844 * Wake up any threads in rdma_init() or rdma_fini().
2845 */
2846 c4iw_wake_up(&ep->com.wr_wait, -ECONNRESET);
2847 sched(dev, skb);
2848 return 0;
2849 }
2850
2851 /*
2852 * Most upcalls from the T4 Core go to sched() to
2853 * schedule the processing on a work queue.
2854 */
2855 c4iw_handler_func c4iw_handlers[NUM_CPL_CMDS] = {
2856 [CPL_ACT_ESTABLISH] = sched,
2857 [CPL_ACT_OPEN_RPL] = sched,
2858 [CPL_RX_DATA] = sched,
2859 [CPL_ABORT_RPL_RSS] = sched,
2860 [CPL_ABORT_RPL] = sched,
2861 [CPL_PASS_OPEN_RPL] = sched,
2862 [CPL_CLOSE_LISTSRV_RPL] = sched,
2863 [CPL_PASS_ACCEPT_REQ] = sched,
2864 [CPL_PASS_ESTABLISH] = sched,
2865 [CPL_PEER_CLOSE] = sched,
2866 [CPL_CLOSE_CON_RPL] = sched,
2867 [CPL_ABORT_REQ_RSS] = peer_abort_intr,
2868 [CPL_RDMA_TERMINATE] = sched,
2869 [CPL_FW4_ACK] = sched,
2870 [CPL_SET_TCB_RPL] = set_tcb_rpl,
2871 [CPL_FW6_MSG] = fw6_msg
2872 };
2873
2874 int __init c4iw_cm_init(void)
2875 {
2876 spin_lock_init(&timeout_lock);
2877 skb_queue_head_init(&rxq);
2878
2879 workq = create_singlethread_workqueue("iw_cxgb4");
2880 if (!workq)
2881 return -ENOMEM;
2882
2883 return 0;
2884 }
2885
2886 void __exit c4iw_cm_term(void)
2887 {
2888 WARN_ON(!list_empty(&timeout_list));
2889 flush_workqueue(workq);
2890 destroy_workqueue(workq);
2891 }
Linux kernel - Deliverables
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