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Merge branch 'master' of master.kernel.org:/pub/scm/linux/kernel/git/jkirsher/net...
[deliverable/linux.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
98ae68b7 120static int snd_win = 128 * 1024;
cfdda9d7 121module_param(snd_win, int, 0644);
98ae68b7 122MODULE_PARM_DESC(snd_win, "TCP send window in bytes (default=128KB)");
cfdda9d7 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);
74594861 175 return error < 0 ? error : 0;
cfdda9d7
SW		 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);
74594861 190 return error < 0 ? error : 0;
cfdda9d7
SW		 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{
cfdda9d7
SW		 222 enum c4iw_ep_state state;
223
2f5b48c3 224 mutex_lock(&epc->mutex);
cfdda9d7 225 state = epc->state;
2f5b48c3 226 mutex_unlock(&epc->mutex);
cfdda9d7
SW		 227 return state;
228}
229
230static void __state_set(struct c4iw_ep_common *epc, enum c4iw_ep_state new)
231{
232 epc->state = new;
233}
234
235static void state_set(struct c4iw_ep_common *epc, enum c4iw_ep_state new)
236{
2f5b48c3 237 mutex_lock(&epc->mutex);
cfdda9d7
SW		 238 PDBG("%s - %s -> %s\n", __func__, states[epc->state], states[new]);
239 __state_set(epc, new);
2f5b48c3 240 mutex_unlock(&epc->mutex);
cfdda9d7
SW		 241 return;
242}
243
244static void *alloc_ep(int size, gfp_t gfp)
245{
246 struct c4iw_ep_common *epc;
247
248 epc = kzalloc(size, gfp);
249 if (epc) {
250 kref_init(&epc->kref);
2f5b48c3 251 mutex_init(&epc->mutex);
aadc4df3 252 c4iw_init_wr_wait(&epc->wr_wait);
cfdda9d7
SW		 253 }
254 PDBG("%s alloc ep %p\n", __func__, epc);
255 return epc;
256}
257
258void _c4iw_free_ep(struct kref *kref)
259{
260 struct c4iw_ep *ep;
261
262 ep = container_of(kref, struct c4iw_ep, com.kref);
263 PDBG("%s ep %p state %s\n", __func__, ep, states[state_read(&ep->com)]);
264 if (test_bit(RELEASE_RESOURCES, &ep->com.flags)) {
265 cxgb4_remove_tid(ep->com.dev->rdev.lldi.tids, 0, ep->hwtid);
266 dst_release(ep->dst);
267 cxgb4_l2t_release(ep->l2t);
268 }
269 kfree(ep);
270}
271
272static void release_ep_resources(struct c4iw_ep *ep)
273{
274 set_bit(RELEASE_RESOURCES, &ep->com.flags);
275 c4iw_put_ep(&ep->com);
276}
277
cfdda9d7
SW		 278static int status2errno(int status)
279{
280 switch (status) {
281 case CPL_ERR_NONE:
282 return 0;
283 case CPL_ERR_CONN_RESET:
284 return -ECONNRESET;
285 case CPL_ERR_ARP_MISS:
286 return -EHOSTUNREACH;
287 case CPL_ERR_CONN_TIMEDOUT:
288 return -ETIMEDOUT;
289 case CPL_ERR_TCAM_FULL:
290 return -ENOMEM;
291 case CPL_ERR_CONN_EXIST:
292 return -EADDRINUSE;
293 default:
294 return -EIO;
295 }
296}
297
298/*
299 * Try and reuse skbs already allocated...
300 */
301static struct sk_buff *get_skb(struct sk_buff *skb, int len, gfp_t gfp)
302{
303 if (skb && !skb_is_nonlinear(skb) && !skb_cloned(skb)) {
304 skb_trim(skb, 0);
305 skb_get(skb);
306 skb_reset_transport_header(skb);
307 } else {
308 skb = alloc_skb(len, gfp);
309 }
310 return skb;
311}
312
313static struct rtable *find_route(struct c4iw_dev *dev, __be32 local_ip,
314 __be32 peer_ip, __be16 local_port,
315 __be16 peer_port, u8 tos)
316{
317 struct rtable *rt;
318 struct flowi fl = {
319 .oif = 0,
320 .nl_u = {
321 .ip4_u = {
322 .daddr = peer_ip,
323 .saddr = local_ip,
324 .tos = tos}
325 },
326 .proto = IPPROTO_TCP,
327 .uli_u = {
328 .ports = {
329 .sport = local_port,
330 .dport = peer_port}
331 }
332 };
333
b23dd4fe
DM		 334 rt = ip_route_output_flow(&init_net, &fl, NULL);
335 if (IS_ERR(rt))
cfdda9d7
SW		 336 return NULL;
337 return rt;
338}
339
340static void arp_failure_discard(void *handle, struct sk_buff *skb)
341{
342 PDBG("%s c4iw_dev %p\n", __func__, handle);
343 kfree_skb(skb);
344}
345
346/*
347 * Handle an ARP failure for an active open.
348 */
349static void act_open_req_arp_failure(void *handle, struct sk_buff *skb)
350{
351 printk(KERN_ERR MOD "ARP failure duing connect\n");
352 kfree_skb(skb);
353}
354
355/*
356 * Handle an ARP failure for a CPL_ABORT_REQ. Change it into a no RST variant
357 * and send it along.
358 */
359static void abort_arp_failure(void *handle, struct sk_buff *skb)
360{
361 struct c4iw_rdev *rdev = handle;
362 struct cpl_abort_req *req = cplhdr(skb);
363
364 PDBG("%s rdev %p\n", __func__, rdev);
365 req->cmd = CPL_ABORT_NO_RST;
366 c4iw_ofld_send(rdev, skb);
367}
368
369static void send_flowc(struct c4iw_ep *ep, struct sk_buff *skb)
370{
371 unsigned int flowclen = 80;
372 struct fw_flowc_wr *flowc;
373 int i;
374
375 skb = get_skb(skb, flowclen, GFP_KERNEL);
376 flowc = (struct fw_flowc_wr *)__skb_put(skb, flowclen);
377
378 flowc->op_to_nparams = cpu_to_be32(FW_WR_OP(FW_FLOWC_WR) |
379 FW_FLOWC_WR_NPARAMS(8));
380 flowc->flowid_len16 = cpu_to_be32(FW_WR_LEN16(DIV_ROUND_UP(flowclen,
381 16)) | FW_WR_FLOWID(ep->hwtid));
382
383 flowc->mnemval[0].mnemonic = FW_FLOWC_MNEM_PFNVFN;
94788657 384 flowc->mnemval[0].val = cpu_to_be32(PCI_FUNC(ep->com.dev->rdev.lldi.pdev->devfn) << 8);
cfdda9d7
SW		 385 flowc->mnemval[1].mnemonic = FW_FLOWC_MNEM_CH;
386 flowc->mnemval[1].val = cpu_to_be32(ep->tx_chan);
387 flowc->mnemval[2].mnemonic = FW_FLOWC_MNEM_PORT;
388 flowc->mnemval[2].val = cpu_to_be32(ep->tx_chan);
389 flowc->mnemval[3].mnemonic = FW_FLOWC_MNEM_IQID;
390 flowc->mnemval[3].val = cpu_to_be32(ep->rss_qid);
391 flowc->mnemval[4].mnemonic = FW_FLOWC_MNEM_SNDNXT;
392 flowc->mnemval[4].val = cpu_to_be32(ep->snd_seq);
393 flowc->mnemval[5].mnemonic = FW_FLOWC_MNEM_RCVNXT;
394 flowc->mnemval[5].val = cpu_to_be32(ep->rcv_seq);
395 flowc->mnemval[6].mnemonic = FW_FLOWC_MNEM_SNDBUF;
396 flowc->mnemval[6].val = cpu_to_be32(snd_win);
397 flowc->mnemval[7].mnemonic = FW_FLOWC_MNEM_MSS;
398 flowc->mnemval[7].val = cpu_to_be32(ep->emss);
399 /* Pad WR to 16 byte boundary */
400 flowc->mnemval[8].mnemonic = 0;
401 flowc->mnemval[8].val = 0;
402 for (i = 0; i < 9; i++) {
403 flowc->mnemval[i].r4[0] = 0;
404 flowc->mnemval[i].r4[1] = 0;
405 flowc->mnemval[i].r4[2] = 0;
406 }
407
408 set_wr_txq(skb, CPL_PRIORITY_DATA, ep->txq_idx);
409 c4iw_ofld_send(&ep->com.dev->rdev, skb);
410}
411
412static int send_halfclose(struct c4iw_ep *ep, gfp_t gfp)
413{
414 struct cpl_close_con_req *req;
415 struct sk_buff *skb;
416 int wrlen = roundup(sizeof *req, 16);
417
418 PDBG("%s ep %p tid %u\n", __func__, ep, ep->hwtid);
419 skb = get_skb(NULL, wrlen, gfp);
420 if (!skb) {
421 printk(KERN_ERR MOD "%s - failed to alloc skb\n", __func__);
422 return -ENOMEM;
423 }
424 set_wr_txq(skb, CPL_PRIORITY_DATA, ep->txq_idx);
425 t4_set_arp_err_handler(skb, NULL, arp_failure_discard);
426 req = (struct cpl_close_con_req *) skb_put(skb, wrlen);
427 memset(req, 0, wrlen);
428 INIT_TP_WR(req, ep->hwtid);
429 OPCODE_TID(req) = cpu_to_be32(MK_OPCODE_TID(CPL_CLOSE_CON_REQ,
430 ep->hwtid));
431 return c4iw_l2t_send(&ep->com.dev->rdev, skb, ep->l2t);
432}
433
434static int send_abort(struct c4iw_ep *ep, struct sk_buff *skb, gfp_t gfp)
435{
436 struct cpl_abort_req *req;
437 int wrlen = roundup(sizeof *req, 16);
438
439 PDBG("%s ep %p tid %u\n", __func__, ep, ep->hwtid);
440 skb = get_skb(skb, wrlen, gfp);
441 if (!skb) {
442 printk(KERN_ERR MOD "%s - failed to alloc skb.\n",
443 __func__);
444 return -ENOMEM;
445 }
446 set_wr_txq(skb, CPL_PRIORITY_DATA, ep->txq_idx);
447 t4_set_arp_err_handler(skb, &ep->com.dev->rdev, abort_arp_failure);
448 req = (struct cpl_abort_req *) skb_put(skb, wrlen);
449 memset(req, 0, wrlen);
450 INIT_TP_WR(req, ep->hwtid);
451 OPCODE_TID(req) = cpu_to_be32(MK_OPCODE_TID(CPL_ABORT_REQ, ep->hwtid));
452 req->cmd = CPL_ABORT_SEND_RST;
453 return c4iw_l2t_send(&ep->com.dev->rdev, skb, ep->l2t);
454}
455
456static int send_connect(struct c4iw_ep *ep)
457{
458 struct cpl_act_open_req *req;
459 struct sk_buff *skb;
460 u64 opt0;
461 u32 opt2;
462 unsigned int mtu_idx;
463 int wscale;
464 int wrlen = roundup(sizeof *req, 16);
465
466 PDBG("%s ep %p atid %u\n", __func__, ep, ep->atid);
467
468 skb = get_skb(NULL, wrlen, GFP_KERNEL);
469 if (!skb) {
470 printk(KERN_ERR MOD "%s - failed to alloc skb.\n",
471 __func__);
472 return -ENOMEM;
473 }
d4f1a5c6 474 set_wr_txq(skb, CPL_PRIORITY_SETUP, ep->ctrlq_idx);
cfdda9d7
SW		 475
476 cxgb4_best_mtu(ep->com.dev->rdev.lldi.mtus, ep->mtu, &mtu_idx);
477 wscale = compute_wscale(rcv_win);
478 opt0 = KEEP_ALIVE(1) |
ba6d3925 479 DELACK(1) |
cfdda9d7
SW		 480 WND_SCALE(wscale) |
481 MSS_IDX(mtu_idx) |
482 L2T_IDX(ep->l2t->idx) |
483 TX_CHAN(ep->tx_chan) |
484 SMAC_SEL(ep->smac_idx) |
485 DSCP(ep->tos) |
486 RCV_BUFSIZ(rcv_win>>10);
487 opt2 = RX_CHANNEL(0) |
488 RSS_QUEUE_VALID | RSS_QUEUE(ep->rss_qid);
489 if (enable_tcp_timestamps)
490 opt2 |= TSTAMPS_EN(1);
491 if (enable_tcp_sack)
492 opt2 |= SACK_EN(1);
493 if (wscale && enable_tcp_window_scaling)
494 opt2 |= WND_SCALE_EN(1);
495 t4_set_arp_err_handler(skb, NULL, act_open_req_arp_failure);
496
497 req = (struct cpl_act_open_req *) skb_put(skb, wrlen);
498 INIT_TP_WR(req, 0);
499 OPCODE_TID(req) = cpu_to_be32(
500 MK_OPCODE_TID(CPL_ACT_OPEN_REQ, ((ep->rss_qid<<14)|ep->atid)));
501 req->local_port = ep->com.local_addr.sin_port;
502 req->peer_port = ep->com.remote_addr.sin_port;
503 req->local_ip = ep->com.local_addr.sin_addr.s_addr;
504 req->peer_ip = ep->com.remote_addr.sin_addr.s_addr;
505 req->opt0 = cpu_to_be64(opt0);
506 req->params = 0;
507 req->opt2 = cpu_to_be32(opt2);
508 return c4iw_l2t_send(&ep->com.dev->rdev, skb, ep->l2t);
509}
510
511static void send_mpa_req(struct c4iw_ep *ep, struct sk_buff *skb)
512{
513 int mpalen, wrlen;
514 struct fw_ofld_tx_data_wr *req;
515 struct mpa_message *mpa;
516
517 PDBG("%s ep %p tid %u pd_len %d\n", __func__, ep, ep->hwtid, ep->plen);
518
519 BUG_ON(skb_cloned(skb));
520
521 mpalen = sizeof(*mpa) + ep->plen;
522 wrlen = roundup(mpalen + sizeof *req, 16);
523 skb = get_skb(skb, wrlen, GFP_KERNEL);
524 if (!skb) {
525 connect_reply_upcall(ep, -ENOMEM);
526 return;
527 }
528 set_wr_txq(skb, CPL_PRIORITY_DATA, ep->txq_idx);
529
530 req = (struct fw_ofld_tx_data_wr *)skb_put(skb, wrlen);
531 memset(req, 0, wrlen);
532 req->op_to_immdlen = cpu_to_be32(
533 FW_WR_OP(FW_OFLD_TX_DATA_WR) |
534 FW_WR_COMPL(1) |
535 FW_WR_IMMDLEN(mpalen));
536 req->flowid_len16 = cpu_to_be32(
537 FW_WR_FLOWID(ep->hwtid) |
538 FW_WR_LEN16(wrlen >> 4));
539 req->plen = cpu_to_be32(mpalen);
540 req->tunnel_to_proxy = cpu_to_be32(
541 FW_OFLD_TX_DATA_WR_FLUSH(1) |
542 FW_OFLD_TX_DATA_WR_SHOVE(1));
543
544 mpa = (struct mpa_message *)(req + 1);
545 memcpy(mpa->key, MPA_KEY_REQ, sizeof(mpa->key));
546 mpa->flags = (crc_enabled ? MPA_CRC : 0) |
547 (markers_enabled ? MPA_MARKERS : 0);
548 mpa->private_data_size = htons(ep->plen);
549 mpa->revision = mpa_rev;
550
551 if (ep->plen)
552 memcpy(mpa->private_data, ep->mpa_pkt + sizeof(*mpa), ep->plen);
553
554 /*
555 * Reference the mpa skb. This ensures the data area
556 * will remain in memory until the hw acks the tx.
557 * Function fw4_ack() will deref it.
558 */
559 skb_get(skb);
560 t4_set_arp_err_handler(skb, NULL, arp_failure_discard);
561 BUG_ON(ep->mpa_skb);
562 ep->mpa_skb = skb;
563 c4iw_l2t_send(&ep->com.dev->rdev, skb, ep->l2t);
564 start_ep_timer(ep);
565 state_set(&ep->com, MPA_REQ_SENT);
566 ep->mpa_attr.initiator = 1;
567 return;
568}
569
570static int send_mpa_reject(struct c4iw_ep *ep, const void *pdata, u8 plen)
571{
572 int mpalen, wrlen;
573 struct fw_ofld_tx_data_wr *req;
574 struct mpa_message *mpa;
575 struct sk_buff *skb;
576
577 PDBG("%s ep %p tid %u pd_len %d\n", __func__, ep, ep->hwtid, ep->plen);
578
579 mpalen = sizeof(*mpa) + plen;
580 wrlen = roundup(mpalen + sizeof *req, 16);
581
582 skb = get_skb(NULL, wrlen, GFP_KERNEL);
583 if (!skb) {
584 printk(KERN_ERR MOD "%s - cannot alloc skb!\n", __func__);
585 return -ENOMEM;
586 }
587 set_wr_txq(skb, CPL_PRIORITY_DATA, ep->txq_idx);
588
589 req = (struct fw_ofld_tx_data_wr *)skb_put(skb, wrlen);
590 memset(req, 0, wrlen);
591 req->op_to_immdlen = cpu_to_be32(
592 FW_WR_OP(FW_OFLD_TX_DATA_WR) |
593 FW_WR_COMPL(1) |
594 FW_WR_IMMDLEN(mpalen));
595 req->flowid_len16 = cpu_to_be32(
596 FW_WR_FLOWID(ep->hwtid) |
597 FW_WR_LEN16(wrlen >> 4));
598 req->plen = cpu_to_be32(mpalen);
599 req->tunnel_to_proxy = cpu_to_be32(
600 FW_OFLD_TX_DATA_WR_FLUSH(1) |
601 FW_OFLD_TX_DATA_WR_SHOVE(1));
602
603 mpa = (struct mpa_message *)(req + 1);
604 memset(mpa, 0, sizeof(*mpa));
605 memcpy(mpa->key, MPA_KEY_REP, sizeof(mpa->key));
606 mpa->flags = MPA_REJECT;
607 mpa->revision = mpa_rev;
608 mpa->private_data_size = htons(plen);
609 if (plen)
610 memcpy(mpa->private_data, pdata, plen);
611
612 /*
613 * Reference the mpa skb again. This ensures the data area
614 * will remain in memory until the hw acks the tx.
615 * Function fw4_ack() will deref it.
616 */
617 skb_get(skb);
618 set_wr_txq(skb, CPL_PRIORITY_DATA, ep->txq_idx);
619 t4_set_arp_err_handler(skb, NULL, arp_failure_discard);
620 BUG_ON(ep->mpa_skb);
621 ep->mpa_skb = skb;
622 return c4iw_l2t_send(&ep->com.dev->rdev, skb, ep->l2t);
623}
624
625static int send_mpa_reply(struct c4iw_ep *ep, const void *pdata, u8 plen)
626{
627 int mpalen, wrlen;
628 struct fw_ofld_tx_data_wr *req;
629 struct mpa_message *mpa;
630 struct sk_buff *skb;
631
632 PDBG("%s ep %p tid %u pd_len %d\n", __func__, ep, ep->hwtid, ep->plen);
633
634 mpalen = sizeof(*mpa) + plen;
635 wrlen = roundup(mpalen + sizeof *req, 16);
636
637 skb = get_skb(NULL, wrlen, GFP_KERNEL);
638 if (!skb) {
639 printk(KERN_ERR MOD "%s - cannot alloc skb!\n", __func__);
640 return -ENOMEM;
641 }
642 set_wr_txq(skb, CPL_PRIORITY_DATA, ep->txq_idx);
643
644 req = (struct fw_ofld_tx_data_wr *) skb_put(skb, wrlen);
645 memset(req, 0, wrlen);
646 req->op_to_immdlen = cpu_to_be32(
647 FW_WR_OP(FW_OFLD_TX_DATA_WR) |
648 FW_WR_COMPL(1) |
649 FW_WR_IMMDLEN(mpalen));
650 req->flowid_len16 = cpu_to_be32(
651 FW_WR_FLOWID(ep->hwtid) |
652 FW_WR_LEN16(wrlen >> 4));
653 req->plen = cpu_to_be32(mpalen);
654 req->tunnel_to_proxy = cpu_to_be32(
655 FW_OFLD_TX_DATA_WR_FLUSH(1) |
656 FW_OFLD_TX_DATA_WR_SHOVE(1));
657
658 mpa = (struct mpa_message *)(req + 1);
659 memset(mpa, 0, sizeof(*mpa));
660 memcpy(mpa->key, MPA_KEY_REP, sizeof(mpa->key));
661 mpa->flags = (ep->mpa_attr.crc_enabled ? MPA_CRC : 0) |
662 (markers_enabled ? MPA_MARKERS : 0);
663 mpa->revision = mpa_rev;
664 mpa->private_data_size = htons(plen);
665 if (plen)
666 memcpy(mpa->private_data, pdata, plen);
667
668 /*
669 * Reference the mpa skb. This ensures the data area
670 * will remain in memory until the hw acks the tx.
671 * Function fw4_ack() will deref it.
672 */
673 skb_get(skb);
674 t4_set_arp_err_handler(skb, NULL, arp_failure_discard);
675 ep->mpa_skb = skb;
676 state_set(&ep->com, MPA_REP_SENT);
677 return c4iw_l2t_send(&ep->com.dev->rdev, skb, ep->l2t);
678}
679
680static int act_establish(struct c4iw_dev *dev, struct sk_buff *skb)
681{
682 struct c4iw_ep *ep;
683 struct cpl_act_establish *req = cplhdr(skb);
684 unsigned int tid = GET_TID(req);
685 unsigned int atid = GET_TID_TID(ntohl(req->tos_atid));
686 struct tid_info *t = dev->rdev.lldi.tids;
687
688 ep = lookup_atid(t, atid);
689
690 PDBG("%s ep %p tid %u snd_isn %u rcv_isn %u\n", __func__, ep, tid,
691 be32_to_cpu(req->snd_isn), be32_to_cpu(req->rcv_isn));
692
693 dst_confirm(ep->dst);
694
695 /* setup the hwtid for this connection */
696 ep->hwtid = tid;
697 cxgb4_insert_tid(t, ep, tid);
698
699 ep->snd_seq = be32_to_cpu(req->snd_isn);
700 ep->rcv_seq = be32_to_cpu(req->rcv_isn);
701
702 set_emss(ep, ntohs(req->tcp_opt));
703
704 /* dealloc the atid */
705 cxgb4_free_atid(t, atid);
706
707 /* start MPA negotiation */
708 send_flowc(ep, NULL);
709 send_mpa_req(ep, skb);
710
711 return 0;
712}
713
714static void close_complete_upcall(struct c4iw_ep *ep)
715{
716 struct iw_cm_event event;
717
718 PDBG("%s ep %p tid %u\n", __func__, ep, ep->hwtid);
719 memset(&event, 0, sizeof(event));
720 event.event = IW_CM_EVENT_CLOSE;
721 if (ep->com.cm_id) {
722 PDBG("close complete delivered ep %p cm_id %p tid %u\n",
723 ep, ep->com.cm_id, ep->hwtid);
724 ep->com.cm_id->event_handler(ep->com.cm_id, &event);
725 ep->com.cm_id->rem_ref(ep->com.cm_id);
726 ep->com.cm_id = NULL;
727 ep->com.qp = NULL;
728 }
729}
730
731static int abort_connection(struct c4iw_ep *ep, struct sk_buff *skb, gfp_t gfp)
732{
733 PDBG("%s ep %p tid %u\n", __func__, ep, ep->hwtid);
734 close_complete_upcall(ep);
735 state_set(&ep->com, ABORTING);
736 return send_abort(ep, skb, gfp);
737}
738
739static void peer_close_upcall(struct c4iw_ep *ep)
740{
741 struct iw_cm_event event;
742
743 PDBG("%s ep %p tid %u\n", __func__, ep, ep->hwtid);
744 memset(&event, 0, sizeof(event));
745 event.event = IW_CM_EVENT_DISCONNECT;
746 if (ep->com.cm_id) {
747 PDBG("peer close delivered ep %p cm_id %p tid %u\n",
748 ep, ep->com.cm_id, ep->hwtid);
749 ep->com.cm_id->event_handler(ep->com.cm_id, &event);
750 }
751}
752
753static void peer_abort_upcall(struct c4iw_ep *ep)
754{
755 struct iw_cm_event event;
756
757 PDBG("%s ep %p tid %u\n", __func__, ep, ep->hwtid);
758 memset(&event, 0, sizeof(event));
759 event.event = IW_CM_EVENT_CLOSE;
760 event.status = -ECONNRESET;
761 if (ep->com.cm_id) {
762 PDBG("abort delivered ep %p cm_id %p tid %u\n", ep,
763 ep->com.cm_id, ep->hwtid);
764 ep->com.cm_id->event_handler(ep->com.cm_id, &event);
765 ep->com.cm_id->rem_ref(ep->com.cm_id);
766 ep->com.cm_id = NULL;
767 ep->com.qp = NULL;
768 }
769}
770
771static void connect_reply_upcall(struct c4iw_ep *ep, int status)
772{
773 struct iw_cm_event event;
774
775 PDBG("%s ep %p tid %u status %d\n", __func__, ep, ep->hwtid, status);
776 memset(&event, 0, sizeof(event));
777 event.event = IW_CM_EVENT_CONNECT_REPLY;
778 event.status = status;
779 event.local_addr = ep->com.local_addr;
780 event.remote_addr = ep->com.remote_addr;
781
782 if ((status == 0) || (status == -ECONNREFUSED)) {
783 event.private_data_len = ep->plen;
784 event.private_data = ep->mpa_pkt + sizeof(struct mpa_message);
785 }
85963e4c
RD		 786
787 PDBG("%s ep %p tid %u status %d\n", __func__, ep,
788 ep->hwtid, status);
789 ep->com.cm_id->event_handler(ep->com.cm_id, &event);
790
cfdda9d7
SW		 791 if (status < 0) {
792 ep->com.cm_id->rem_ref(ep->com.cm_id);
793 ep->com.cm_id = NULL;
794 ep->com.qp = NULL;
795 }
796}
797
798static void connect_request_upcall(struct c4iw_ep *ep)
799{
800 struct iw_cm_event event;
801
802 PDBG("%s ep %p tid %u\n", __func__, ep, ep->hwtid);
803 memset(&event, 0, sizeof(event));
804 event.event = IW_CM_EVENT_CONNECT_REQUEST;
805 event.local_addr = ep->com.local_addr;
806 event.remote_addr = ep->com.remote_addr;
807 event.private_data_len = ep->plen;
808 event.private_data = ep->mpa_pkt + sizeof(struct mpa_message);
809 event.provider_data = ep;
810 if (state_read(&ep->parent_ep->com) != DEAD) {
811 c4iw_get_ep(&ep->com);
812 ep->parent_ep->com.cm_id->event_handler(
813 ep->parent_ep->com.cm_id,
814 &event);
815 }
816 c4iw_put_ep(&ep->parent_ep->com);
817 ep->parent_ep = NULL;
818}
819
820static void established_upcall(struct c4iw_ep *ep)
821{
822 struct iw_cm_event event;
823
824 PDBG("%s ep %p tid %u\n", __func__, ep, ep->hwtid);
825 memset(&event, 0, sizeof(event));
826 event.event = IW_CM_EVENT_ESTABLISHED;
827 if (ep->com.cm_id) {
828 PDBG("%s ep %p tid %u\n", __func__, ep, ep->hwtid);
829 ep->com.cm_id->event_handler(ep->com.cm_id, &event);
830 }
831}
832
833static int update_rx_credits(struct c4iw_ep *ep, u32 credits)
834{
835 struct cpl_rx_data_ack *req;
836 struct sk_buff *skb;
837 int wrlen = roundup(sizeof *req, 16);
838
839 PDBG("%s ep %p tid %u credits %u\n", __func__, ep, ep->hwtid, credits);
840 skb = get_skb(NULL, wrlen, GFP_KERNEL);
841 if (!skb) {
842 printk(KERN_ERR MOD "update_rx_credits - cannot alloc skb!\n");
843 return 0;
844 }
845
846 req = (struct cpl_rx_data_ack *) skb_put(skb, wrlen);
847 memset(req, 0, wrlen);
848 INIT_TP_WR(req, ep->hwtid);
849 OPCODE_TID(req) = cpu_to_be32(MK_OPCODE_TID(CPL_RX_DATA_ACK,
850 ep->hwtid));
ba6d3925
SW		 851 req->credit_dack = cpu_to_be32(credits | RX_FORCE_ACK(1) |
852 F_RX_DACK_CHANGE |
853 V_RX_DACK_MODE(dack_mode));
d4f1a5c6 854 set_wr_txq(skb, CPL_PRIORITY_ACK, ep->ctrlq_idx);
cfdda9d7
SW		 855 c4iw_ofld_send(&ep->com.dev->rdev, skb);
856 return credits;
857}
858
859static void process_mpa_reply(struct c4iw_ep *ep, struct sk_buff *skb)
860{
861 struct mpa_message *mpa;
862 u16 plen;
863 struct c4iw_qp_attributes attrs;
864 enum c4iw_qp_attr_mask mask;
865 int err;
866
867 PDBG("%s ep %p tid %u\n", __func__, ep, ep->hwtid);
868
869 /*
870 * Stop mpa timer. If it expired, then the state has
871 * changed and we bail since ep_timeout already aborted
872 * the connection.
873 */
874 stop_ep_timer(ep);
875 if (state_read(&ep->com) != MPA_REQ_SENT)
876 return;
877
878 /*
879 * If we get more than the supported amount of private data
880 * then we must fail this connection.
881 */
882 if (ep->mpa_pkt_len + skb->len > sizeof(ep->mpa_pkt)) {
883 err = -EINVAL;
884 goto err;
885 }
886
887 /*
888 * copy the new data into our accumulation buffer.
889 */
890 skb_copy_from_linear_data(skb, &(ep->mpa_pkt[ep->mpa_pkt_len]),
891 skb->len);
892 ep->mpa_pkt_len += skb->len;
893
894 /*
895 * if we don't even have the mpa message, then bail.
896 */
897 if (ep->mpa_pkt_len < sizeof(*mpa))
898 return;
899 mpa = (struct mpa_message *) ep->mpa_pkt;
900
901 /* Validate MPA header. */
902 if (mpa->revision != mpa_rev) {
903 err = -EPROTO;
904 goto err;
905 }
906 if (memcmp(mpa->key, MPA_KEY_REP, sizeof(mpa->key))) {
907 err = -EPROTO;
908 goto err;
909 }
910
911 plen = ntohs(mpa->private_data_size);
912
913 /*
914 * Fail if there's too much private data.
915 */
916 if (plen > MPA_MAX_PRIVATE_DATA) {
917 err = -EPROTO;
918 goto err;
919 }
920
921 /*
922 * If plen does not account for pkt size
923 */
924 if (ep->mpa_pkt_len > (sizeof(*mpa) + plen)) {
925 err = -EPROTO;
926 goto err;
927 }
928
929 ep->plen = (u8) plen;
930
931 /*
932 * If we don't have all the pdata yet, then bail.
933 * We'll continue process when more data arrives.
934 */
935 if (ep->mpa_pkt_len < (sizeof(*mpa) + plen))
936 return;
937
938 if (mpa->flags & MPA_REJECT) {
939 err = -ECONNREFUSED;
940 goto err;
941 }
942
943 /*
944 * If we get here we have accumulated the entire mpa
945 * start reply message including private data. And
946 * the MPA header is valid.
947 */
948 state_set(&ep->com, FPDU_MODE);
949 ep->mpa_attr.crc_enabled = (mpa->flags & MPA_CRC) | crc_enabled ? 1 : 0;
950 ep->mpa_attr.recv_marker_enabled = markers_enabled;
951 ep->mpa_attr.xmit_marker_enabled = mpa->flags & MPA_MARKERS ? 1 : 0;
952 ep->mpa_attr.version = mpa_rev;
953 ep->mpa_attr.p2p_type = peer2peer ? p2p_type :
954 FW_RI_INIT_P2PTYPE_DISABLED;
955 PDBG("%s - crc_enabled=%d, recv_marker_enabled=%d, "
956 "xmit_marker_enabled=%d, version=%d\n", __func__,
957 ep->mpa_attr.crc_enabled, ep->mpa_attr.recv_marker_enabled,
958 ep->mpa_attr.xmit_marker_enabled, ep->mpa_attr.version);
959
960 attrs.mpa_attr = ep->mpa_attr;
961 attrs.max_ird = ep->ird;
962 attrs.max_ord = ep->ord;
963 attrs.llp_stream_handle = ep;
964 attrs.next_state = C4IW_QP_STATE_RTS;
965
966 mask = C4IW_QP_ATTR_NEXT_STATE |
967 C4IW_QP_ATTR_LLP_STREAM_HANDLE | C4IW_QP_ATTR_MPA_ATTR |
968 C4IW_QP_ATTR_MAX_IRD | C4IW_QP_ATTR_MAX_ORD;
969
970 /* bind QP and TID with INIT_WR */
971 err = c4iw_modify_qp(ep->com.qp->rhp,
972 ep->com.qp, mask, &attrs, 1);
973 if (err)
974 goto err;
975 goto out;
976err:
b21ef16a
SW		 977 state_set(&ep->com, ABORTING);
978 send_abort(ep, skb, GFP_KERNEL);
cfdda9d7
SW		 979out:
980 connect_reply_upcall(ep, err);
981 return;
982}
983
984static void process_mpa_request(struct c4iw_ep *ep, struct sk_buff *skb)
985{
986 struct mpa_message *mpa;
987 u16 plen;
988
989 PDBG("%s ep %p tid %u\n", __func__, ep, ep->hwtid);
990
991 if (state_read(&ep->com) != MPA_REQ_WAIT)
992 return;
993
994 /*
995 * If we get more than the supported amount of private data
996 * then we must fail this connection.
997 */
998 if (ep->mpa_pkt_len + skb->len > sizeof(ep->mpa_pkt)) {
999 stop_ep_timer(ep);
1000 abort_connection(ep, skb, GFP_KERNEL);
1001 return;
1002 }
1003
1004 PDBG("%s enter (%s line %u)\n", __func__, __FILE__, __LINE__);
1005
1006 /*
1007 * Copy the new data into our accumulation buffer.
1008 */
1009 skb_copy_from_linear_data(skb, &(ep->mpa_pkt[ep->mpa_pkt_len]),
1010 skb->len);
1011 ep->mpa_pkt_len += skb->len;
1012
1013 /*
1014 * If we don't even have the mpa message, then bail.
1015 * We'll continue process when more data arrives.
1016 */
1017 if (ep->mpa_pkt_len < sizeof(*mpa))
1018 return;
1019
1020 PDBG("%s enter (%s line %u)\n", __func__, __FILE__, __LINE__);
1021 stop_ep_timer(ep);
1022 mpa = (struct mpa_message *) ep->mpa_pkt;
1023
1024 /*
1025 * Validate MPA Header.
1026 */
1027 if (mpa->revision != mpa_rev) {
1028 abort_connection(ep, skb, GFP_KERNEL);
1029 return;
1030 }
1031
1032 if (memcmp(mpa->key, MPA_KEY_REQ, sizeof(mpa->key))) {
1033 abort_connection(ep, skb, GFP_KERNEL);
1034 return;
1035 }
1036
1037 plen = ntohs(mpa->private_data_size);
1038
1039 /*
1040 * Fail if there's too much private data.
1041 */
1042 if (plen > MPA_MAX_PRIVATE_DATA) {
1043 abort_connection(ep, skb, GFP_KERNEL);
1044 return;
1045 }
1046
1047 /*
1048 * If plen does not account for pkt size
1049 */
1050 if (ep->mpa_pkt_len > (sizeof(*mpa) + plen)) {
1051 abort_connection(ep, skb, GFP_KERNEL);
1052 return;
1053 }
1054 ep->plen = (u8) plen;
1055
1056 /*
1057 * If we don't have all the pdata yet, then bail.
1058 */
1059 if (ep->mpa_pkt_len < (sizeof(*mpa) + plen))
1060 return;
1061
1062 /*
1063 * If we get here we have accumulated the entire mpa
1064 * start reply message including private data.
1065 */
1066 ep->mpa_attr.initiator = 0;
1067 ep->mpa_attr.crc_enabled = (mpa->flags & MPA_CRC) | crc_enabled ? 1 : 0;
1068 ep->mpa_attr.recv_marker_enabled = markers_enabled;
1069 ep->mpa_attr.xmit_marker_enabled = mpa->flags & MPA_MARKERS ? 1 : 0;
1070 ep->mpa_attr.version = mpa_rev;
1071 ep->mpa_attr.p2p_type = peer2peer ? p2p_type :
1072 FW_RI_INIT_P2PTYPE_DISABLED;
1073 PDBG("%s - crc_enabled=%d, recv_marker_enabled=%d, "
1074 "xmit_marker_enabled=%d, version=%d p2p_type=%d\n", __func__,
1075 ep->mpa_attr.crc_enabled, ep->mpa_attr.recv_marker_enabled,
1076 ep->mpa_attr.xmit_marker_enabled, ep->mpa_attr.version,
1077 ep->mpa_attr.p2p_type);
1078
1079 state_set(&ep->com, MPA_REQ_RCVD);
1080
1081 /* drive upcall */
1082 connect_request_upcall(ep);
1083 return;
1084}
1085
1086static int rx_data(struct c4iw_dev *dev, struct sk_buff *skb)
1087{
1088 struct c4iw_ep *ep;
1089 struct cpl_rx_data *hdr = cplhdr(skb);
1090 unsigned int dlen = ntohs(hdr->len);
1091 unsigned int tid = GET_TID(hdr);
1092 struct tid_info *t = dev->rdev.lldi.tids;
1093
1094 ep = lookup_tid(t, tid);
1095 PDBG("%s ep %p tid %u dlen %u\n", __func__, ep, ep->hwtid, dlen);
1096 skb_pull(skb, sizeof(*hdr));
1097 skb_trim(skb, dlen);
1098
1099 ep->rcv_seq += dlen;
1100 BUG_ON(ep->rcv_seq != (ntohl(hdr->seq) + dlen));
1101
1102 /* update RX credits */
1103 update_rx_credits(ep, dlen);
1104
1105 switch (state_read(&ep->com)) {
1106 case MPA_REQ_SENT:
1107 process_mpa_reply(ep, skb);
1108 break;
1109 case MPA_REQ_WAIT:
1110 process_mpa_request(ep, skb);
1111 break;
1112 case MPA_REP_SENT:
1113 break;
1114 default:
1115 printk(KERN_ERR MOD "%s Unexpected streaming data."
1116 " ep %p state %d tid %u\n",
1117 __func__, ep, state_read(&ep->com), ep->hwtid);
1118
1119 /*
1120 * The ep will timeout and inform the ULP of the failure.
1121 * See ep_timeout().
1122 */
1123 break;
1124 }
1125 return 0;
1126}
1127
1128static int abort_rpl(struct c4iw_dev *dev, struct sk_buff *skb)
1129{
1130 struct c4iw_ep *ep;
1131 struct cpl_abort_rpl_rss *rpl = cplhdr(skb);
cfdda9d7
SW		 1132 int release = 0;
1133 unsigned int tid = GET_TID(rpl);
1134 struct tid_info *t = dev->rdev.lldi.tids;
1135
1136 ep = lookup_tid(t, tid);
1137 PDBG("%s ep %p tid %u\n", __func__, ep, ep->hwtid);
1138 BUG_ON(!ep);
2f5b48c3 1139 mutex_lock(&ep->com.mutex);
cfdda9d7
SW		 1140 switch (ep->com.state) {
1141 case ABORTING:
1142 __state_set(&ep->com, DEAD);
1143 release = 1;
1144 break;
1145 default:
1146 printk(KERN_ERR "%s ep %p state %d\n",
1147 __func__, ep, ep->com.state);
1148 break;
1149 }
2f5b48c3 1150 mutex_unlock(&ep->com.mutex);
cfdda9d7
SW		 1151
1152 if (release)
1153 release_ep_resources(ep);
1154 return 0;
1155}
1156
1157/*
1158 * Return whether a failed active open has allocated a TID
1159 */
1160static inline int act_open_has_tid(int status)
1161{
1162 return status != CPL_ERR_TCAM_FULL && status != CPL_ERR_CONN_EXIST &&
1163 status != CPL_ERR_ARP_MISS;
1164}
1165
1166static int act_open_rpl(struct c4iw_dev *dev, struct sk_buff *skb)
1167{
1168 struct c4iw_ep *ep;
1169 struct cpl_act_open_rpl *rpl = cplhdr(skb);
1170 unsigned int atid = GET_TID_TID(GET_AOPEN_ATID(
1171 ntohl(rpl->atid_status)));
1172 struct tid_info *t = dev->rdev.lldi.tids;
1173 int status = GET_AOPEN_STATUS(ntohl(rpl->atid_status));
1174
1175 ep = lookup_atid(t, atid);
1176
1177 PDBG("%s ep %p atid %u status %u errno %d\n", __func__, ep, atid,
1178 status, status2errno(status));
1179
1180 if (status == CPL_ERR_RTX_NEG_ADVICE) {
1181 printk(KERN_WARNING MOD "Connection problems for atid %u\n",
1182 atid);
1183 return 0;
1184 }
1185
1186 connect_reply_upcall(ep, status2errno(status));
1187 state_set(&ep->com, DEAD);
1188
1189 if (status && act_open_has_tid(status))
1190 cxgb4_remove_tid(ep->com.dev->rdev.lldi.tids, 0, GET_TID(rpl));
1191
1192 cxgb4_free_atid(t, atid);
1193 dst_release(ep->dst);
1194 cxgb4_l2t_release(ep->l2t);
1195 c4iw_put_ep(&ep->com);
1196
1197 return 0;
1198}
1199
1200static int pass_open_rpl(struct c4iw_dev *dev, struct sk_buff *skb)
1201{
1202 struct cpl_pass_open_rpl *rpl = cplhdr(skb);
1203 struct tid_info *t = dev->rdev.lldi.tids;
1204 unsigned int stid = GET_TID(rpl);
1205 struct c4iw_listen_ep *ep = lookup_stid(t, stid);
1206
1207 if (!ep) {
1208 printk(KERN_ERR MOD "stid %d lookup failure!\n", stid);
1209 return 0;
1210 }
1211 PDBG("%s ep %p status %d error %d\n", __func__, ep,
1212 rpl->status, status2errno(rpl->status));
aadc4df3
SW		 1213 ep->com.wr_wait.ret = status2errno(rpl->status);
1214 ep->com.wr_wait.done = 1;
1215 wake_up(&ep->com.wr_wait.wait);
cfdda9d7
SW		 1216
1217 return 0;
1218}
1219
1220static int listen_stop(struct c4iw_listen_ep *ep)
1221{
1222 struct sk_buff *skb;
1223 struct cpl_close_listsvr_req *req;
1224
1225 PDBG("%s ep %p\n", __func__, ep);
1226 skb = get_skb(NULL, sizeof(*req), GFP_KERNEL);
1227 if (!skb) {
1228 printk(KERN_ERR MOD "%s - failed to alloc skb\n", __func__);
1229 return -ENOMEM;
1230 }
1231 req = (struct cpl_close_listsvr_req *) skb_put(skb, sizeof(*req));
1232 INIT_TP_WR(req, 0);
1233 OPCODE_TID(req) = cpu_to_be32(MK_OPCODE_TID(CPL_CLOSE_LISTSRV_REQ,
1234 ep->stid));
1235 req->reply_ctrl = cpu_to_be16(
1236 QUEUENO(ep->com.dev->rdev.lldi.rxq_ids[0]));
1237 set_wr_txq(skb, CPL_PRIORITY_SETUP, 0);
1238 return c4iw_ofld_send(&ep->com.dev->rdev, skb);
1239}
1240
1241static int close_listsrv_rpl(struct c4iw_dev *dev, struct sk_buff *skb)
1242{
1243 struct cpl_close_listsvr_rpl *rpl = cplhdr(skb);
1244 struct tid_info *t = dev->rdev.lldi.tids;
1245 unsigned int stid = GET_TID(rpl);
1246 struct c4iw_listen_ep *ep = lookup_stid(t, stid);
1247
1248 PDBG("%s ep %p\n", __func__, ep);
aadc4df3
SW		 1249 ep->com.wr_wait.ret = status2errno(rpl->status);
1250 ep->com.wr_wait.done = 1;
1251 wake_up(&ep->com.wr_wait.wait);
cfdda9d7
SW		 1252 return 0;
1253}
1254
1255static void accept_cr(struct c4iw_ep *ep, __be32 peer_ip, struct sk_buff *skb,
1256 struct cpl_pass_accept_req *req)
1257{
1258 struct cpl_pass_accept_rpl *rpl;
1259 unsigned int mtu_idx;
1260 u64 opt0;
1261 u32 opt2;
1262 int wscale;
1263
1264 PDBG("%s ep %p tid %u\n", __func__, ep, ep->hwtid);
1265 BUG_ON(skb_cloned(skb));
1266 skb_trim(skb, sizeof(*rpl));
1267 skb_get(skb);
1268 cxgb4_best_mtu(ep->com.dev->rdev.lldi.mtus, ep->mtu, &mtu_idx);
1269 wscale = compute_wscale(rcv_win);
1270 opt0 = KEEP_ALIVE(1) |
ba6d3925 1271 DELACK(1) |
cfdda9d7
SW		 1272 WND_SCALE(wscale) |
1273 MSS_IDX(mtu_idx) |
1274 L2T_IDX(ep->l2t->idx) |
1275 TX_CHAN(ep->tx_chan) |
1276 SMAC_SEL(ep->smac_idx) |
1277 DSCP(ep->tos) |
1278 RCV_BUFSIZ(rcv_win>>10);
1279 opt2 = RX_CHANNEL(0) |
1280 RSS_QUEUE_VALID | RSS_QUEUE(ep->rss_qid);
1281
1282 if (enable_tcp_timestamps && req->tcpopt.tstamp)
1283 opt2 |= TSTAMPS_EN(1);
1284 if (enable_tcp_sack && req->tcpopt.sack)
1285 opt2 |= SACK_EN(1);
1286 if (wscale && enable_tcp_window_scaling)
1287 opt2 |= WND_SCALE_EN(1);
1288
1289 rpl = cplhdr(skb);
1290 INIT_TP_WR(rpl, ep->hwtid);
1291 OPCODE_TID(rpl) = cpu_to_be32(MK_OPCODE_TID(CPL_PASS_ACCEPT_RPL,
1292 ep->hwtid));
1293 rpl->opt0 = cpu_to_be64(opt0);
1294 rpl->opt2 = cpu_to_be32(opt2);
d4f1a5c6 1295 set_wr_txq(skb, CPL_PRIORITY_SETUP, ep->ctrlq_idx);
cfdda9d7
SW		 1296 c4iw_l2t_send(&ep->com.dev->rdev, skb, ep->l2t);
1297
1298 return;
1299}
1300
1301static void reject_cr(struct c4iw_dev *dev, u32 hwtid, __be32 peer_ip,
1302 struct sk_buff *skb)
1303{
1304 PDBG("%s c4iw_dev %p tid %u peer_ip %x\n", __func__, dev, hwtid,
1305 peer_ip);
1306 BUG_ON(skb_cloned(skb));
1307 skb_trim(skb, sizeof(struct cpl_tid_release));
1308 skb_get(skb);
1309 release_tid(&dev->rdev, hwtid, skb);
1310 return;
1311}
1312
1313static void get_4tuple(struct cpl_pass_accept_req *req,
1314 __be32 *local_ip, __be32 *peer_ip,
1315 __be16 *local_port, __be16 *peer_port)
1316{
1317 int eth_len = G_ETH_HDR_LEN(be32_to_cpu(req->hdr_len));
1318 int ip_len = G_IP_HDR_LEN(be32_to_cpu(req->hdr_len));
1319 struct iphdr *ip = (struct iphdr *)((u8 *)(req + 1) + eth_len);
1320 struct tcphdr *tcp = (struct tcphdr *)
1321 ((u8 *)(req + 1) + eth_len + ip_len);
1322
1323 PDBG("%s saddr 0x%x daddr 0x%x sport %u dport %u\n", __func__,
1324 ntohl(ip->saddr), ntohl(ip->daddr), ntohs(tcp->source),
1325 ntohs(tcp->dest));
1326
1327 *peer_ip = ip->saddr;
1328 *local_ip = ip->daddr;
1329 *peer_port = tcp->source;
1330 *local_port = tcp->dest;
1331
1332 return;
1333}
1334
1335static int pass_accept_req(struct c4iw_dev *dev, struct sk_buff *skb)
1336{
1337 struct c4iw_ep *child_ep, *parent_ep;
1338 struct cpl_pass_accept_req *req = cplhdr(skb);
1339 unsigned int stid = GET_POPEN_TID(ntohl(req->tos_stid));
1340 struct tid_info *t = dev->rdev.lldi.tids;
1341 unsigned int hwtid = GET_TID(req);
1342 struct dst_entry *dst;
1343 struct l2t_entry *l2t;
1344 struct rtable *rt;
1345 __be32 local_ip, peer_ip;
1346 __be16 local_port, peer_port;
1347 struct net_device *pdev;
1348 u32 tx_chan, smac_idx;
1349 u16 rss_qid;
1350 u32 mtu;
1351 int step;
d4f1a5c6 1352 int txq_idx, ctrlq_idx;
cfdda9d7
SW		 1353
1354 parent_ep = lookup_stid(t, stid);
1355 PDBG("%s parent ep %p tid %u\n", __func__, parent_ep, hwtid);
1356
1357 get_4tuple(req, &local_ip, &peer_ip, &local_port, &peer_port);
1358
1359 if (state_read(&parent_ep->com) != LISTEN) {
1360 printk(KERN_ERR "%s - listening ep not in LISTEN\n",
1361 __func__);
1362 goto reject;
1363 }
1364
1365 /* Find output route */
1366 rt = find_route(dev, local_ip, peer_ip, local_port, peer_port,
1367 GET_POPEN_TOS(ntohl(req->tos_stid)));
1368 if (!rt) {
1369 printk(KERN_ERR MOD "%s - failed to find dst entry!\n",
1370 __func__);
1371 goto reject;
1372 }
d8d1f30b 1373 dst = &rt->dst;
cfdda9d7
SW		 1374 if (dst->neighbour->dev->flags & IFF_LOOPBACK) {
1375 pdev = ip_dev_find(&init_net, peer_ip);
1376 BUG_ON(!pdev);
1377 l2t = cxgb4_l2t_get(dev->rdev.lldi.l2t, dst->neighbour,
1378 pdev, 0);
1379 mtu = pdev->mtu;
1380 tx_chan = cxgb4_port_chan(pdev);
2c5934bf 1381 smac_idx = (cxgb4_port_viid(pdev) & 0x7F) << 1;
cfdda9d7
SW		 1382 step = dev->rdev.lldi.ntxq / dev->rdev.lldi.nchan;
1383 txq_idx = cxgb4_port_idx(pdev) * step;
d4f1a5c6 1384 ctrlq_idx = cxgb4_port_idx(pdev);
cfdda9d7
SW		 1385 step = dev->rdev.lldi.nrxq / dev->rdev.lldi.nchan;
1386 rss_qid = dev->rdev.lldi.rxq_ids[cxgb4_port_idx(pdev) * step];
1387 dev_put(pdev);
1388 } else {
1389 l2t = cxgb4_l2t_get(dev->rdev.lldi.l2t, dst->neighbour,
1390 dst->neighbour->dev, 0);
1391 mtu = dst_mtu(dst);
1392 tx_chan = cxgb4_port_chan(dst->neighbour->dev);
2c5934bf 1393 smac_idx = (cxgb4_port_viid(dst->neighbour->dev) & 0x7F) << 1;
cfdda9d7
SW		 1394 step = dev->rdev.lldi.ntxq / dev->rdev.lldi.nchan;
1395 txq_idx = cxgb4_port_idx(dst->neighbour->dev) * step;
d4f1a5c6 1396 ctrlq_idx = cxgb4_port_idx(dst->neighbour->dev);
cfdda9d7
SW		 1397 step = dev->rdev.lldi.nrxq / dev->rdev.lldi.nchan;
1398 rss_qid = dev->rdev.lldi.rxq_ids[
1399 cxgb4_port_idx(dst->neighbour->dev) * step];
1400 }
1401 if (!l2t) {
1402 printk(KERN_ERR MOD "%s - failed to allocate l2t entry!\n",
1403 __func__);
1404 dst_release(dst);
1405 goto reject;
1406 }
1407
1408 child_ep = alloc_ep(sizeof(*child_ep), GFP_KERNEL);
1409 if (!child_ep) {
1410 printk(KERN_ERR MOD "%s - failed to allocate ep entry!\n",
1411 __func__);
1412 cxgb4_l2t_release(l2t);
1413 dst_release(dst);
1414 goto reject;
1415 }
1416 state_set(&child_ep->com, CONNECTING);
1417 child_ep->com.dev = dev;
1418 child_ep->com.cm_id = NULL;
1419 child_ep->com.local_addr.sin_family = PF_INET;
1420 child_ep->com.local_addr.sin_port = local_port;
1421 child_ep->com.local_addr.sin_addr.s_addr = local_ip;
1422 child_ep->com.remote_addr.sin_family = PF_INET;
1423 child_ep->com.remote_addr.sin_port = peer_port;
1424 child_ep->com.remote_addr.sin_addr.s_addr = peer_ip;
1425 c4iw_get_ep(&parent_ep->com);
1426 child_ep->parent_ep = parent_ep;
1427 child_ep->tos = GET_POPEN_TOS(ntohl(req->tos_stid));
1428 child_ep->l2t = l2t;
1429 child_ep->dst = dst;
1430 child_ep->hwtid = hwtid;
1431 child_ep->tx_chan = tx_chan;
1432 child_ep->smac_idx = smac_idx;
1433 child_ep->rss_qid = rss_qid;
1434 child_ep->mtu = mtu;
1435 child_ep->txq_idx = txq_idx;
d4f1a5c6 1436 child_ep->ctrlq_idx = ctrlq_idx;
cfdda9d7
SW		 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;
cfdda9d7
SW		 1478 int disconnect = 1;
1479 int release = 0;
1480 int closing = 0;
1481 struct tid_info *t = dev->rdev.lldi.tids;
1482 unsigned int tid = GET_TID(hdr);
cfdda9d7
SW		 1483
1484 ep = lookup_tid(t, tid);
1485 PDBG("%s ep %p tid %u\n", __func__, ep, ep->hwtid);
1486 dst_confirm(ep->dst);
1487
2f5b48c3 1488 mutex_lock(&ep->com.mutex);
cfdda9d7
SW		 1489 switch (ep->com.state) {
1490 case MPA_REQ_WAIT:
1491 __state_set(&ep->com, CLOSING);
1492 break;
1493 case MPA_REQ_SENT:
1494 __state_set(&ep->com, CLOSING);
1495 connect_reply_upcall(ep, -ECONNRESET);
1496 break;
1497 case MPA_REQ_RCVD:
1498
1499 /*
1500 * We're gonna mark this puppy DEAD, but keep
1501 * the reference on it until the ULP accepts or
1502 * rejects the CR. Also wake up anyone waiting
1503 * in rdma connection migration (see c4iw_accept_cr()).
1504 */
1505 __state_set(&ep->com, CLOSING);
aadc4df3
SW		 1506 ep->com.wr_wait.done = 1;
1507 ep->com.wr_wait.ret = -ECONNRESET;
cfdda9d7 1508 PDBG("waking up ep %p tid %u\n", ep, ep->hwtid);
aadc4df3 1509 wake_up(&ep->com.wr_wait.wait);
cfdda9d7
SW		 1510 break;
1511 case MPA_REP_SENT:
1512 __state_set(&ep->com, CLOSING);
aadc4df3
SW		 1513 ep->com.wr_wait.done = 1;
1514 ep->com.wr_wait.ret = -ECONNRESET;
cfdda9d7 1515 PDBG("waking up ep %p tid %u\n", ep, ep->hwtid);
aadc4df3 1516 wake_up(&ep->com.wr_wait.wait);
cfdda9d7
SW		 1517 break;
1518 case FPDU_MODE:
ca5a2202 1519 start_ep_timer(ep);
cfdda9d7
SW		 1520 __state_set(&ep->com, CLOSING);
1521 closing = 1;
1522 peer_close_upcall(ep);
1523 break;
1524 case ABORTING:
1525 disconnect = 0;
1526 break;
1527 case CLOSING:
1528 __state_set(&ep->com, MORIBUND);
1529 disconnect = 0;
1530 break;
1531 case MORIBUND:
ca5a2202 1532 stop_ep_timer(ep);
cfdda9d7
SW		 1533 if (ep->com.cm_id && ep->com.qp) {
1534 attrs.next_state = C4IW_QP_STATE_IDLE;
1535 c4iw_modify_qp(ep->com.qp->rhp, ep->com.qp,
1536 C4IW_QP_ATTR_NEXT_STATE, &attrs, 1);
1537 }
1538 close_complete_upcall(ep);
1539 __state_set(&ep->com, DEAD);
1540 release = 1;
1541 disconnect = 0;
1542 break;
1543 case DEAD:
1544 disconnect = 0;
1545 break;
1546 default:
1547 BUG_ON(1);
1548 }
2f5b48c3 1549 mutex_unlock(&ep->com.mutex);
cfdda9d7
SW		 1550 if (closing) {
1551 attrs.next_state = C4IW_QP_STATE_CLOSING;
1552 c4iw_modify_qp(ep->com.qp->rhp, ep->com.qp,
1553 C4IW_QP_ATTR_NEXT_STATE, &attrs, 1);
1554 }
cfdda9d7
SW		 1555 if (disconnect)
1556 c4iw_ep_disconnect(ep, 0, GFP_KERNEL);
1557 if (release)
1558 release_ep_resources(ep);
1559 return 0;
1560}
1561
1562/*
1563 * Returns whether an ABORT_REQ_RSS message is a negative advice.
1564 */
1565static int is_neg_adv_abort(unsigned int status)
1566{
1567 return status == CPL_ERR_RTX_NEG_ADVICE ||
1568 status == CPL_ERR_PERSIST_NEG_ADVICE;
1569}
1570
1571static int peer_abort(struct c4iw_dev *dev, struct sk_buff *skb)
1572{
1573 struct cpl_abort_req_rss *req = cplhdr(skb);
1574 struct c4iw_ep *ep;
1575 struct cpl_abort_rpl *rpl;
1576 struct sk_buff *rpl_skb;
1577 struct c4iw_qp_attributes attrs;
1578 int ret;
1579 int release = 0;
cfdda9d7
SW		 1580 struct tid_info *t = dev->rdev.lldi.tids;
1581 unsigned int tid = GET_TID(req);
cfdda9d7
SW		 1582
1583 ep = lookup_tid(t, tid);
1584 if (is_neg_adv_abort(req->status)) {
1585 PDBG("%s neg_adv_abort ep %p tid %u\n", __func__, ep,
1586 ep->hwtid);
1587 return 0;
1588 }
cfdda9d7
SW		 1589 PDBG("%s ep %p tid %u state %u\n", __func__, ep, ep->hwtid,
1590 ep->com.state);
2f5b48c3
SW		 1591
1592 /*
1593 * Wake up any threads in rdma_init() or rdma_fini().
1594 */
1595 ep->com.wr_wait.done = 1;
1596 ep->com.wr_wait.ret = -ECONNRESET;
1597 wake_up(&ep->com.wr_wait.wait);
1598
1599 mutex_lock(&ep->com.mutex);
cfdda9d7
SW		 1600 switch (ep->com.state) {
1601 case CONNECTING:
1602 break;
1603 case MPA_REQ_WAIT:
ca5a2202 1604 stop_ep_timer(ep);
cfdda9d7
SW		 1605 break;
1606 case MPA_REQ_SENT:
ca5a2202 1607 stop_ep_timer(ep);
cfdda9d7
SW		 1608 connect_reply_upcall(ep, -ECONNRESET);
1609 break;
1610 case MPA_REP_SENT:
cfdda9d7
SW		 1611 break;
1612 case MPA_REQ_RCVD:
cfdda9d7
SW		 1613 break;
1614 case MORIBUND:
1615 case CLOSING:
ca5a2202 1616 stop_ep_timer(ep);
cfdda9d7
SW		 1617 /*FALLTHROUGH*/
1618 case FPDU_MODE:
1619 if (ep->com.cm_id && ep->com.qp) {
1620 attrs.next_state = C4IW_QP_STATE_ERROR;
1621 ret = c4iw_modify_qp(ep->com.qp->rhp,
1622 ep->com.qp, C4IW_QP_ATTR_NEXT_STATE,
1623 &attrs, 1);
1624 if (ret)
1625 printk(KERN_ERR MOD
1626 "%s - qp <- error failed!\n",
1627 __func__);
1628 }
1629 peer_abort_upcall(ep);
1630 break;
1631 case ABORTING:
1632 break;
1633 case DEAD:
1634 PDBG("%s PEER_ABORT IN DEAD STATE!!!!\n", __func__);
2f5b48c3 1635 mutex_unlock(&ep->com.mutex);
cfdda9d7
SW		 1636 return 0;
1637 default:
1638 BUG_ON(1);
1639 break;
1640 }
1641 dst_confirm(ep->dst);
1642 if (ep->com.state != ABORTING) {
1643 __state_set(&ep->com, DEAD);
1644 release = 1;
1645 }
2f5b48c3 1646 mutex_unlock(&ep->com.mutex);
cfdda9d7
SW		 1647
1648 rpl_skb = get_skb(skb, sizeof(*rpl), GFP_KERNEL);
1649 if (!rpl_skb) {
1650 printk(KERN_ERR MOD "%s - cannot allocate skb!\n",
1651 __func__);
1652 release = 1;
1653 goto out;
1654 }
1655 set_wr_txq(skb, CPL_PRIORITY_DATA, ep->txq_idx);
1656 rpl = (struct cpl_abort_rpl *) skb_put(rpl_skb, sizeof(*rpl));
1657 INIT_TP_WR(rpl, ep->hwtid);
1658 OPCODE_TID(rpl) = cpu_to_be32(MK_OPCODE_TID(CPL_ABORT_RPL, ep->hwtid));
1659 rpl->cmd = CPL_ABORT_NO_RST;
1660 c4iw_ofld_send(&ep->com.dev->rdev, rpl_skb);
1661out:
cfdda9d7
SW		 1662 if (release)
1663 release_ep_resources(ep);
1664 return 0;
1665}
1666
1667static int close_con_rpl(struct c4iw_dev *dev, struct sk_buff *skb)
1668{
1669 struct c4iw_ep *ep;
1670 struct c4iw_qp_attributes attrs;
1671 struct cpl_close_con_rpl *rpl = cplhdr(skb);
cfdda9d7
SW		 1672 int release = 0;
1673 struct tid_info *t = dev->rdev.lldi.tids;
1674 unsigned int tid = GET_TID(rpl);
cfdda9d7
SW		 1675
1676 ep = lookup_tid(t, tid);
1677
1678 PDBG("%s ep %p tid %u\n", __func__, ep, ep->hwtid);
1679 BUG_ON(!ep);
1680
1681 /* The cm_id may be null if we failed to connect */
2f5b48c3 1682 mutex_lock(&ep->com.mutex);
cfdda9d7
SW		 1683 switch (ep->com.state) {
1684 case CLOSING:
1685 __state_set(&ep->com, MORIBUND);
1686 break;
1687 case MORIBUND:
ca5a2202 1688 stop_ep_timer(ep);
cfdda9d7
SW		 1689 if ((ep->com.cm_id) && (ep->com.qp)) {
1690 attrs.next_state = C4IW_QP_STATE_IDLE;
1691 c4iw_modify_qp(ep->com.qp->rhp,
1692 ep->com.qp,
1693 C4IW_QP_ATTR_NEXT_STATE,
1694 &attrs, 1);
1695 }
1696 close_complete_upcall(ep);
1697 __state_set(&ep->com, DEAD);
1698 release = 1;
1699 break;
1700 case ABORTING:
1701 case DEAD:
1702 break;
1703 default:
1704 BUG_ON(1);
1705 break;
1706 }
2f5b48c3 1707 mutex_unlock(&ep->com.mutex);
cfdda9d7
SW		 1708 if (release)
1709 release_ep_resources(ep);
1710 return 0;
1711}
1712
1713static int terminate(struct c4iw_dev *dev, struct sk_buff *skb)
1714{
0e42c1f4 1715 struct cpl_rdma_terminate *rpl = cplhdr(skb);
cfdda9d7 1716 struct tid_info *t = dev->rdev.lldi.tids;
0e42c1f4
SW		 1717 unsigned int tid = GET_TID(rpl);
1718 struct c4iw_ep *ep;
1719 struct c4iw_qp_attributes attrs;
cfdda9d7
SW		 1720
1721 ep = lookup_tid(t, tid);
0e42c1f4 1722 BUG_ON(!ep);
cfdda9d7 1723
0e42c1f4
SW		 1724 if (ep->com.qp) {
1725 printk(KERN_WARNING MOD "TERM received tid %u qpid %u\n", tid,
1726 ep->com.qp->wq.sq.qid);
1727 attrs.next_state = C4IW_QP_STATE_TERMINATE;
1728 c4iw_modify_qp(ep->com.qp->rhp, ep->com.qp,
1729 C4IW_QP_ATTR_NEXT_STATE, &attrs, 1);
1730 } else
1731 printk(KERN_WARNING MOD "TERM received tid %u no qp\n", tid);
cfdda9d7 1732
cfdda9d7
SW		 1733 return 0;
1734}
1735
1736/*
1737 * Upcall from the adapter indicating data has been transmitted.
1738 * For us its just the single MPA request or reply. We can now free
1739 * the skb holding the mpa message.
1740 */
1741static int fw4_ack(struct c4iw_dev *dev, struct sk_buff *skb)
1742{
1743 struct c4iw_ep *ep;
1744 struct cpl_fw4_ack *hdr = cplhdr(skb);
1745 u8 credits = hdr->credits;
1746 unsigned int tid = GET_TID(hdr);
1747 struct tid_info *t = dev->rdev.lldi.tids;
1748
1749
1750 ep = lookup_tid(t, tid);
1751 PDBG("%s ep %p tid %u credits %u\n", __func__, ep, ep->hwtid, credits);
1752 if (credits == 0) {
aa1ad260
JP		 1753 PDBG("%s 0 credit ack ep %p tid %u state %u\n",
1754 __func__, ep, ep->hwtid, state_read(&ep->com));
cfdda9d7
SW		 1755 return 0;
1756 }
1757
1758 dst_confirm(ep->dst);
1759 if (ep->mpa_skb) {
1760 PDBG("%s last streaming msg ack ep %p tid %u state %u "
1761 "initiator %u freeing skb\n", __func__, ep, ep->hwtid,
1762 state_read(&ep->com), ep->mpa_attr.initiator ? 1 : 0);
1763 kfree_skb(ep->mpa_skb);
1764 ep->mpa_skb = NULL;
1765 }
1766 return 0;
1767}
1768
cfdda9d7
SW		 1769int c4iw_reject_cr(struct iw_cm_id *cm_id, const void *pdata, u8 pdata_len)
1770{
1771 int err;
1772 struct c4iw_ep *ep = to_ep(cm_id);
1773 PDBG("%s ep %p tid %u\n", __func__, ep, ep->hwtid);
1774
1775 if (state_read(&ep->com) == DEAD) {
1776 c4iw_put_ep(&ep->com);
1777 return -ECONNRESET;
1778 }
1779 BUG_ON(state_read(&ep->com) != MPA_REQ_RCVD);
1780 if (mpa_rev == 0)
1781 abort_connection(ep, NULL, GFP_KERNEL);
1782 else {
1783 err = send_mpa_reject(ep, pdata, pdata_len);
1784 err = c4iw_ep_disconnect(ep, 0, GFP_KERNEL);
1785 }
1786 c4iw_put_ep(&ep->com);
1787 return 0;
1788}
1789
1790int c4iw_accept_cr(struct iw_cm_id *cm_id, struct iw_cm_conn_param *conn_param)
1791{
1792 int err;
1793 struct c4iw_qp_attributes attrs;
1794 enum c4iw_qp_attr_mask mask;
1795 struct c4iw_ep *ep = to_ep(cm_id);
1796 struct c4iw_dev *h = to_c4iw_dev(cm_id->device);
1797 struct c4iw_qp *qp = get_qhp(h, conn_param->qpn);
1798
1799 PDBG("%s ep %p tid %u\n", __func__, ep, ep->hwtid);
1800 if (state_read(&ep->com) == DEAD) {
1801 err = -ECONNRESET;
1802 goto err;
1803 }
1804
1805 BUG_ON(state_read(&ep->com) != MPA_REQ_RCVD);
1806 BUG_ON(!qp);
1807
be4c9bad
RD		 1808 if ((conn_param->ord > c4iw_max_read_depth) ||
1809 (conn_param->ird > c4iw_max_read_depth)) {
cfdda9d7
SW		 1810 abort_connection(ep, NULL, GFP_KERNEL);
1811 err = -EINVAL;
1812 goto err;
1813 }
1814
1815 cm_id->add_ref(cm_id);
1816 ep->com.cm_id = cm_id;
1817 ep->com.qp = qp;
1818
1819 ep->ird = conn_param->ird;
1820 ep->ord = conn_param->ord;
1821
1822 if (peer2peer && ep->ird == 0)
1823 ep->ird = 1;
1824
1825 PDBG("%s %d ird %d ord %d\n", __func__, __LINE__, ep->ird, ep->ord);
1826
1827 /* bind QP to EP and move to RTS */
1828 attrs.mpa_attr = ep->mpa_attr;
1829 attrs.max_ird = ep->ird;
1830 attrs.max_ord = ep->ord;
1831 attrs.llp_stream_handle = ep;
1832 attrs.next_state = C4IW_QP_STATE_RTS;
1833
1834 /* bind QP and TID with INIT_WR */
1835 mask = C4IW_QP_ATTR_NEXT_STATE |
1836 C4IW_QP_ATTR_LLP_STREAM_HANDLE |
1837 C4IW_QP_ATTR_MPA_ATTR |
1838 C4IW_QP_ATTR_MAX_IRD |
1839 C4IW_QP_ATTR_MAX_ORD;
1840
1841 err = c4iw_modify_qp(ep->com.qp->rhp,
1842 ep->com.qp, mask, &attrs, 1);
1843 if (err)
1844 goto err1;
1845 err = send_mpa_reply(ep, conn_param->private_data,
1846 conn_param->private_data_len);
1847 if (err)
1848 goto err1;
1849
1850 state_set(&ep->com, FPDU_MODE);
1851 established_upcall(ep);
1852 c4iw_put_ep(&ep->com);
1853 return 0;
1854err1:
1855 ep->com.cm_id = NULL;
1856 ep->com.qp = NULL;
1857 cm_id->rem_ref(cm_id);
1858err:
1859 c4iw_put_ep(&ep->com);
1860 return err;
1861}
1862
1863int c4iw_connect(struct iw_cm_id *cm_id, struct iw_cm_conn_param *conn_param)
1864{
1865 int err = 0;
1866 struct c4iw_dev *dev = to_c4iw_dev(cm_id->device);
1867 struct c4iw_ep *ep;
1868 struct rtable *rt;
1869 struct net_device *pdev;
1870 int step;
1871
be4c9bad
RD		 1872 if ((conn_param->ord > c4iw_max_read_depth) ||
1873 (conn_param->ird > c4iw_max_read_depth)) {
1874 err = -EINVAL;
1875 goto out;
1876 }
cfdda9d7
SW		 1877 ep = alloc_ep(sizeof(*ep), GFP_KERNEL);
1878 if (!ep) {
1879 printk(KERN_ERR MOD "%s - cannot alloc ep.\n", __func__);
1880 err = -ENOMEM;
1881 goto out;
1882 }
1883 init_timer(&ep->timer);
1884 ep->plen = conn_param->private_data_len;
1885 if (ep->plen)
1886 memcpy(ep->mpa_pkt + sizeof(struct mpa_message),
1887 conn_param->private_data, ep->plen);
1888 ep->ird = conn_param->ird;
1889 ep->ord = conn_param->ord;
1890
1891 if (peer2peer && ep->ord == 0)
1892 ep->ord = 1;
1893
1894 cm_id->add_ref(cm_id);
1895 ep->com.dev = dev;
1896 ep->com.cm_id = cm_id;
1897 ep->com.qp = get_qhp(dev, conn_param->qpn);
1898 BUG_ON(!ep->com.qp);
1899 PDBG("%s qpn 0x%x qp %p cm_id %p\n", __func__, conn_param->qpn,
1900 ep->com.qp, cm_id);
1901
1902 /*
1903 * Allocate an active TID to initiate a TCP connection.
1904 */
1905 ep->atid = cxgb4_alloc_atid(dev->rdev.lldi.tids, ep);
1906 if (ep->atid == -1) {
1907 printk(KERN_ERR MOD "%s - cannot alloc atid.\n", __func__);
1908 err = -ENOMEM;
1909 goto fail2;
1910 }
1911
1912 PDBG("%s saddr 0x%x sport 0x%x raddr 0x%x rport 0x%x\n", __func__,
1913 ntohl(cm_id->local_addr.sin_addr.s_addr),
1914 ntohs(cm_id->local_addr.sin_port),
1915 ntohl(cm_id->remote_addr.sin_addr.s_addr),
1916 ntohs(cm_id->remote_addr.sin_port));
1917
1918 /* find a route */
1919 rt = find_route(dev,
1920 cm_id->local_addr.sin_addr.s_addr,
1921 cm_id->remote_addr.sin_addr.s_addr,
1922 cm_id->local_addr.sin_port,
1923 cm_id->remote_addr.sin_port, 0);
1924 if (!rt) {
1925 printk(KERN_ERR MOD "%s - cannot find route.\n", __func__);
1926 err = -EHOSTUNREACH;
1927 goto fail3;
1928 }
d8d1f30b 1929 ep->dst = &rt->dst;
cfdda9d7
SW		 1930
1931 /* get a l2t entry */
1932 if (ep->dst->neighbour->dev->flags & IFF_LOOPBACK) {
1933 PDBG("%s LOOPBACK\n", __func__);
1934 pdev = ip_dev_find(&init_net,
1935 cm_id->remote_addr.sin_addr.s_addr);
1936 ep->l2t = cxgb4_l2t_get(ep->com.dev->rdev.lldi.l2t,
1937 ep->dst->neighbour,
1938 pdev, 0);
1939 ep->mtu = pdev->mtu;
1940 ep->tx_chan = cxgb4_port_chan(pdev);
2c5934bf 1941 ep->smac_idx = (cxgb4_port_viid(pdev) & 0x7F) << 1;
cfdda9d7
SW		 1942 step = ep->com.dev->rdev.lldi.ntxq /
1943 ep->com.dev->rdev.lldi.nchan;
1944 ep->txq_idx = cxgb4_port_idx(pdev) * step;
1945 step = ep->com.dev->rdev.lldi.nrxq /
1946 ep->com.dev->rdev.lldi.nchan;
d4f1a5c6 1947 ep->ctrlq_idx = cxgb4_port_idx(pdev);
cfdda9d7
SW		 1948 ep->rss_qid = ep->com.dev->rdev.lldi.rxq_ids[
1949 cxgb4_port_idx(pdev) * step];
1950 dev_put(pdev);
1951 } else {
1952 ep->l2t = cxgb4_l2t_get(ep->com.dev->rdev.lldi.l2t,
1953 ep->dst->neighbour,
1954 ep->dst->neighbour->dev, 0);
1955 ep->mtu = dst_mtu(ep->dst);
1956 ep->tx_chan = cxgb4_port_chan(ep->dst->neighbour->dev);
2c5934bf
SW		 1957 ep->smac_idx = (cxgb4_port_viid(ep->dst->neighbour->dev) &
1958 0x7F) << 1;
cfdda9d7
SW		 1959 step = ep->com.dev->rdev.lldi.ntxq /
1960 ep->com.dev->rdev.lldi.nchan;
1961 ep->txq_idx = cxgb4_port_idx(ep->dst->neighbour->dev) * step;
d4f1a5c6 1962 ep->ctrlq_idx = cxgb4_port_idx(ep->dst->neighbour->dev);
cfdda9d7
SW		 1963 step = ep->com.dev->rdev.lldi.nrxq /
1964 ep->com.dev->rdev.lldi.nchan;
1965 ep->rss_qid = ep->com.dev->rdev.lldi.rxq_ids[
1966 cxgb4_port_idx(ep->dst->neighbour->dev) * step];
1967 }
1968 if (!ep->l2t) {
1969 printk(KERN_ERR MOD "%s - cannot alloc l2e.\n", __func__);
1970 err = -ENOMEM;
1971 goto fail4;
1972 }
1973
1974 PDBG("%s txq_idx %u tx_chan %u smac_idx %u rss_qid %u l2t_idx %u\n",
1975 __func__, ep->txq_idx, ep->tx_chan, ep->smac_idx, ep->rss_qid,
1976 ep->l2t->idx);
1977
1978 state_set(&ep->com, CONNECTING);
1979 ep->tos = 0;
1980 ep->com.local_addr = cm_id->local_addr;
1981 ep->com.remote_addr = cm_id->remote_addr;
1982
1983 /* send connect request to rnic */
1984 err = send_connect(ep);
1985 if (!err)
1986 goto out;
1987
1988 cxgb4_l2t_release(ep->l2t);
1989fail4:
1990 dst_release(ep->dst);
1991fail3:
1992 cxgb4_free_atid(ep->com.dev->rdev.lldi.tids, ep->atid);
1993fail2:
1994 cm_id->rem_ref(cm_id);
1995 c4iw_put_ep(&ep->com);
1996out:
1997 return err;
1998}
1999
2000int c4iw_create_listen(struct iw_cm_id *cm_id, int backlog)
2001{
2002 int err = 0;
2003 struct c4iw_dev *dev = to_c4iw_dev(cm_id->device);
2004 struct c4iw_listen_ep *ep;
2005
2006
2007 might_sleep();
2008
2009 ep = alloc_ep(sizeof(*ep), GFP_KERNEL);
2010 if (!ep) {
2011 printk(KERN_ERR MOD "%s - cannot alloc ep.\n", __func__);
2012 err = -ENOMEM;
2013 goto fail1;
2014 }
2015 PDBG("%s ep %p\n", __func__, ep);
2016 cm_id->add_ref(cm_id);
2017 ep->com.cm_id = cm_id;
2018 ep->com.dev = dev;
2019 ep->backlog = backlog;
2020 ep->com.local_addr = cm_id->local_addr;
2021
2022 /*
2023 * Allocate a server TID.
2024 */
2025 ep->stid = cxgb4_alloc_stid(dev->rdev.lldi.tids, PF_INET, ep);
2026 if (ep->stid == -1) {
be4c9bad 2027 printk(KERN_ERR MOD "%s - cannot alloc stid.\n", __func__);
cfdda9d7
SW		 2028 err = -ENOMEM;
2029 goto fail2;
2030 }
2031
2032 state_set(&ep->com, LISTEN);
aadc4df3 2033 c4iw_init_wr_wait(&ep->com.wr_wait);
cfdda9d7
SW		 2034 err = cxgb4_create_server(ep->com.dev->rdev.lldi.ports[0], ep->stid,
2035 ep->com.local_addr.sin_addr.s_addr,
2036 ep->com.local_addr.sin_port,
2037 ep->com.dev->rdev.lldi.rxq_ids[0]);
2038 if (err)
2039 goto fail3;
2040
2041 /* wait for pass_open_rpl */
aadc4df3
SW		 2042 err = c4iw_wait_for_reply(&ep->com.dev->rdev, &ep->com.wr_wait, 0, 0,
2043 __func__);
cfdda9d7
SW		 2044 if (!err) {
2045 cm_id->provider_data = ep;
2046 goto out;
2047 }
2048fail3:
2049 cxgb4_free_stid(ep->com.dev->rdev.lldi.tids, ep->stid, PF_INET);
2050fail2:
2051 cm_id->rem_ref(cm_id);
2052 c4iw_put_ep(&ep->com);
2053fail1:
2054out:
2055 return err;
2056}
2057
2058int c4iw_destroy_listen(struct iw_cm_id *cm_id)
2059{
2060 int err;
2061 struct c4iw_listen_ep *ep = to_listen_ep(cm_id);
2062
2063 PDBG("%s ep %p\n", __func__, ep);
2064
2065 might_sleep();
2066 state_set(&ep->com, DEAD);
aadc4df3 2067 c4iw_init_wr_wait(&ep->com.wr_wait);
cfdda9d7
SW		 2068 err = listen_stop(ep);
2069 if (err)
2070 goto done;
aadc4df3
SW		 2071 err = c4iw_wait_for_reply(&ep->com.dev->rdev, &ep->com.wr_wait, 0, 0,
2072 __func__);
cfdda9d7
SW		 2073 cxgb4_free_stid(ep->com.dev->rdev.lldi.tids, ep->stid, PF_INET);
2074done:
cfdda9d7
SW		 2075 cm_id->rem_ref(cm_id);
2076 c4iw_put_ep(&ep->com);
2077 return err;
2078}
2079
2080int c4iw_ep_disconnect(struct c4iw_ep *ep, int abrupt, gfp_t gfp)
2081{
2082 int ret = 0;
cfdda9d7
SW		 2083 int close = 0;
2084 int fatal = 0;
2085 struct c4iw_rdev *rdev;
cfdda9d7 2086
2f5b48c3 2087 mutex_lock(&ep->com.mutex);
cfdda9d7
SW		 2088
2089 PDBG("%s ep %p state %s, abrupt %d\n", __func__, ep,
2090 states[ep->com.state], abrupt);
2091
2092 rdev = &ep->com.dev->rdev;
2093 if (c4iw_fatal_error(rdev)) {
2094 fatal = 1;
2095 close_complete_upcall(ep);
2096 ep->com.state = DEAD;
2097 }
2098 switch (ep->com.state) {
2099 case MPA_REQ_WAIT:
2100 case MPA_REQ_SENT:
2101 case MPA_REQ_RCVD:
2102 case MPA_REP_SENT:
2103 case FPDU_MODE:
2104 close = 1;
2105 if (abrupt)
2106 ep->com.state = ABORTING;
2107 else {
2108 ep->com.state = CLOSING;
ca5a2202 2109 start_ep_timer(ep);
cfdda9d7
SW		 2110 }
2111 set_bit(CLOSE_SENT, &ep->com.flags);
2112 break;
2113 case CLOSING:
2114 if (!test_and_set_bit(CLOSE_SENT, &ep->com.flags)) {
2115 close = 1;
2116 if (abrupt) {
ca5a2202 2117 stop_ep_timer(ep);
cfdda9d7
SW		 2118 ep->com.state = ABORTING;
2119 } else
2120 ep->com.state = MORIBUND;
2121 }
2122 break;
2123 case MORIBUND:
2124 case ABORTING:
2125 case DEAD:
2126 PDBG("%s ignoring disconnect ep %p state %u\n",
2127 __func__, ep, ep->com.state);
2128 break;
2129 default:
2130 BUG();
2131 break;
2132 }
2133
2f5b48c3 2134 mutex_unlock(&ep->com.mutex);
cfdda9d7
SW		 2135 if (close) {
2136 if (abrupt)
2137 ret = abort_connection(ep, NULL, gfp);
2138 else
2139 ret = send_halfclose(ep, gfp);
2140 if (ret)
2141 fatal = 1;
2142 }
2143 if (fatal)
2144 release_ep_resources(ep);
2145 return ret;
2146}
2147
2f5b48c3
SW		 2148static int async_event(struct c4iw_dev *dev, struct sk_buff *skb)
2149{
2150 struct cpl_fw6_msg *rpl = cplhdr(skb);
2151 c4iw_ev_dispatch(dev, (struct t4_cqe *)&rpl->data[0]);
2152 return 0;
2153}
2154
be4c9bad
RD		 2155/*
2156 * These are the real handlers that are called from a
2157 * work queue.
2158 */
2159static c4iw_handler_func work_handlers[NUM_CPL_CMDS] = {
2160 [CPL_ACT_ESTABLISH] = act_establish,
2161 [CPL_ACT_OPEN_RPL] = act_open_rpl,
2162 [CPL_RX_DATA] = rx_data,
2163 [CPL_ABORT_RPL_RSS] = abort_rpl,
2164 [CPL_ABORT_RPL] = abort_rpl,
2165 [CPL_PASS_OPEN_RPL] = pass_open_rpl,
2166 [CPL_CLOSE_LISTSRV_RPL] = close_listsrv_rpl,
2167 [CPL_PASS_ACCEPT_REQ] = pass_accept_req,
2168 [CPL_PASS_ESTABLISH] = pass_establish,
2169 [CPL_PEER_CLOSE] = peer_close,
2170 [CPL_ABORT_REQ_RSS] = peer_abort,
2171 [CPL_CLOSE_CON_RPL] = close_con_rpl,
2172 [CPL_RDMA_TERMINATE] = terminate,
2f5b48c3
SW		 2173 [CPL_FW4_ACK] = fw4_ack,
2174 [CPL_FW6_MSG] = async_event
be4c9bad
RD		 2175};
2176
2177static void process_timeout(struct c4iw_ep *ep)
2178{
2179 struct c4iw_qp_attributes attrs;
2180 int abort = 1;
2181
2f5b48c3 2182 mutex_lock(&ep->com.mutex);
be4c9bad
RD		 2183 PDBG("%s ep %p tid %u state %d\n", __func__, ep, ep->hwtid,
2184 ep->com.state);
2185 switch (ep->com.state) {
2186 case MPA_REQ_SENT:
2187 __state_set(&ep->com, ABORTING);
2188 connect_reply_upcall(ep, -ETIMEDOUT);
2189 break;
2190 case MPA_REQ_WAIT:
2191 __state_set(&ep->com, ABORTING);
2192 break;
2193 case CLOSING:
2194 case MORIBUND:
2195 if (ep->com.cm_id && ep->com.qp) {
2196 attrs.next_state = C4IW_QP_STATE_ERROR;
2197 c4iw_modify_qp(ep->com.qp->rhp,
2198 ep->com.qp, C4IW_QP_ATTR_NEXT_STATE,
2199 &attrs, 1);
2200 }
2201 __state_set(&ep->com, ABORTING);
2202 break;
2203 default:
2204 printk(KERN_ERR "%s unexpected state ep %p tid %u state %u\n",
2205 __func__, ep, ep->hwtid, ep->com.state);
2206 WARN_ON(1);
2207 abort = 0;
2208 }
2f5b48c3 2209 mutex_unlock(&ep->com.mutex);
be4c9bad
RD		 2210 if (abort)
2211 abort_connection(ep, NULL, GFP_KERNEL);
2212 c4iw_put_ep(&ep->com);
2213}
2214
2215static void process_timedout_eps(void)
2216{
2217 struct c4iw_ep *ep;
2218
2219 spin_lock_irq(&timeout_lock);
2220 while (!list_empty(&timeout_list)) {
2221 struct list_head *tmp;
2222
2223 tmp = timeout_list.next;
2224 list_del(tmp);
2225 spin_unlock_irq(&timeout_lock);
2226 ep = list_entry(tmp, struct c4iw_ep, entry);
2227 process_timeout(ep);
2228 spin_lock_irq(&timeout_lock);
2229 }
2230 spin_unlock_irq(&timeout_lock);
2231}
2232
2233static void process_work(struct work_struct *work)
2234{
2235 struct sk_buff *skb = NULL;
2236 struct c4iw_dev *dev;
c1d7356c 2237 struct cpl_act_establish *rpl;
be4c9bad
RD		 2238 unsigned int opcode;
2239 int ret;
2240
2241 while ((skb = skb_dequeue(&rxq))) {
2242 rpl = cplhdr(skb);
2243 dev = *((struct c4iw_dev **) (skb->cb + sizeof(void *)));
2244 opcode = rpl->ot.opcode;
2245
2246 BUG_ON(!work_handlers[opcode]);
2247 ret = work_handlers[opcode](dev, skb);
2248 if (!ret)
2249 kfree_skb(skb);
2250 }
2251 process_timedout_eps();
2252}
2253
2254static DECLARE_WORK(skb_work, process_work);
2255
2256static void ep_timeout(unsigned long arg)
2257{
2258 struct c4iw_ep *ep = (struct c4iw_ep *)arg;
2259
2260 spin_lock(&timeout_lock);
2261 list_add_tail(&ep->entry, &timeout_list);
2262 spin_unlock(&timeout_lock);
2263 queue_work(workq, &skb_work);
2264}
2265
cfdda9d7
SW		 2266/*
2267 * All the CM events are handled on a work queue to have a safe context.
2268 */
2269static int sched(struct c4iw_dev *dev, struct sk_buff *skb)
2270{
2271
2272 /*
2273 * Save dev in the skb->cb area.
2274 */
2275 *((struct c4iw_dev **) (skb->cb + sizeof(void *))) = dev;
2276
2277 /*
2278 * Queue the skb and schedule the worker thread.
2279 */
2280 skb_queue_tail(&rxq, skb);
2281 queue_work(workq, &skb_work);
2282 return 0;
2283}
2284
2285static int set_tcb_rpl(struct c4iw_dev *dev, struct sk_buff *skb)
2286{
2287 struct cpl_set_tcb_rpl *rpl = cplhdr(skb);
2288
2289 if (rpl->status != CPL_ERR_NONE) {
2290 printk(KERN_ERR MOD "Unexpected SET_TCB_RPL status %u "
2291 "for tid %u\n", rpl->status, GET_TID(rpl));
2292 }
2f5b48c3 2293 kfree_skb(skb);
cfdda9d7
SW		 2294 return 0;
2295}
2296
be4c9bad
RD		 2297static int fw6_msg(struct c4iw_dev *dev, struct sk_buff *skb)
2298{
2299 struct cpl_fw6_msg *rpl = cplhdr(skb);
2300 struct c4iw_wr_wait *wr_waitp;
2301 int ret;
2302
2303 PDBG("%s type %u\n", __func__, rpl->type);
2304
2305 switch (rpl->type) {
2306 case 1:
2307 ret = (int)((be64_to_cpu(rpl->data[0]) >> 8) & 0xff);
c8e081a1 2308 wr_waitp = (struct c4iw_wr_wait *)(__force unsigned long) rpl->data[1];
be4c9bad
RD		 2309 PDBG("%s wr_waitp %p ret %u\n", __func__, wr_waitp, ret);
2310 if (wr_waitp) {
2f5b48c3
SW		 2311 if (ret)
2312 wr_waitp->ret = -ret;
2313 else
2314 wr_waitp->ret = 0;
be4c9bad
RD		 2315 wr_waitp->done = 1;
2316 wake_up(&wr_waitp->wait);
2317 }
2f5b48c3 2318 kfree_skb(skb);
be4c9bad
RD		 2319 break;
2320 case 2:
2f5b48c3 2321 sched(dev, skb);
be4c9bad
RD		 2322 break;
2323 default:
2324 printk(KERN_ERR MOD "%s unexpected fw6 msg type %u\n", __func__,
2325 rpl->type);
2f5b48c3 2326 kfree_skb(skb);
be4c9bad
RD		 2327 break;
2328 }
2329 return 0;
2330}
2331
2332/*
2333 * Most upcalls from the T4 Core go to sched() to
2334 * schedule the processing on a work queue.
2335 */
2336c4iw_handler_func c4iw_handlers[NUM_CPL_CMDS] = {
2337 [CPL_ACT_ESTABLISH] = sched,
2338 [CPL_ACT_OPEN_RPL] = sched,
2339 [CPL_RX_DATA] = sched,
2340 [CPL_ABORT_RPL_RSS] = sched,
2341 [CPL_ABORT_RPL] = sched,
2342 [CPL_PASS_OPEN_RPL] = sched,
2343 [CPL_CLOSE_LISTSRV_RPL] = sched,
2344 [CPL_PASS_ACCEPT_REQ] = sched,
2345 [CPL_PASS_ESTABLISH] = sched,
2346 [CPL_PEER_CLOSE] = sched,
2347 [CPL_CLOSE_CON_RPL] = sched,
2348 [CPL_ABORT_REQ_RSS] = sched,
2349 [CPL_RDMA_TERMINATE] = sched,
2350 [CPL_FW4_ACK] = sched,
2351 [CPL_SET_TCB_RPL] = set_tcb_rpl,
2352 [CPL_FW6_MSG] = fw6_msg
2353};
2354
cfdda9d7
SW		 2355int __init c4iw_cm_init(void)
2356{
be4c9bad 2357 spin_lock_init(&timeout_lock);
cfdda9d7
SW		 2358 skb_queue_head_init(&rxq);
2359
2360 workq = create_singlethread_workqueue("iw_cxgb4");
2361 if (!workq)
2362 return -ENOMEM;
2363
cfdda9d7
SW		 2364 return 0;
2365}
2366
2367void __exit c4iw_cm_term(void)
2368{
be4c9bad 2369 WARN_ON(!list_empty(&timeout_list));
cfdda9d7
SW		 2370 flush_workqueue(workq);
2371 destroy_workqueue(workq);
2372}
Linux kernel - Deliverables
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