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Linux 2.6.39-rc7
[linux-2.6-block.git] / drivers / infiniband / hw / cxgb4 / cm.c
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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
b52fe09e 64static int dack_mode = 1;
ba6d3925 65module_param(dack_mode, int, 0644);
b52fe09e 66MODULE_PARM_DESC(dack_mode, "Delayed ack mode (default=1)");
ba6d3925 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;
78fbfd8a
DM		 318
319 rt = ip_route_output_ports(&init_net, NULL, peer_ip, local_ip,
320 peer_port, local_port, IPPROTO_TCP,
321 tos, 0);
b23dd4fe 322 if (IS_ERR(rt))
cfdda9d7
SW		 323 return NULL;
324 return rt;
325}
326
327static void arp_failure_discard(void *handle, struct sk_buff *skb)
328{
329 PDBG("%s c4iw_dev %p\n", __func__, handle);
330 kfree_skb(skb);
331}
332
333/*
334 * Handle an ARP failure for an active open.
335 */
336static void act_open_req_arp_failure(void *handle, struct sk_buff *skb)
337{
338 printk(KERN_ERR MOD "ARP failure duing connect\n");
339 kfree_skb(skb);
340}
341
342/*
343 * Handle an ARP failure for a CPL_ABORT_REQ. Change it into a no RST variant
344 * and send it along.
345 */
346static void abort_arp_failure(void *handle, struct sk_buff *skb)
347{
348 struct c4iw_rdev *rdev = handle;
349 struct cpl_abort_req *req = cplhdr(skb);
350
351 PDBG("%s rdev %p\n", __func__, rdev);
352 req->cmd = CPL_ABORT_NO_RST;
353 c4iw_ofld_send(rdev, skb);
354}
355
356static void send_flowc(struct c4iw_ep *ep, struct sk_buff *skb)
357{
358 unsigned int flowclen = 80;
359 struct fw_flowc_wr *flowc;
360 int i;
361
362 skb = get_skb(skb, flowclen, GFP_KERNEL);
363 flowc = (struct fw_flowc_wr *)__skb_put(skb, flowclen);
364
365 flowc->op_to_nparams = cpu_to_be32(FW_WR_OP(FW_FLOWC_WR) |
366 FW_FLOWC_WR_NPARAMS(8));
367 flowc->flowid_len16 = cpu_to_be32(FW_WR_LEN16(DIV_ROUND_UP(flowclen,
368 16)) | FW_WR_FLOWID(ep->hwtid));
369
370 flowc->mnemval[0].mnemonic = FW_FLOWC_MNEM_PFNVFN;
94788657 371 flowc->mnemval[0].val = cpu_to_be32(PCI_FUNC(ep->com.dev->rdev.lldi.pdev->devfn) << 8);
cfdda9d7
SW		 372 flowc->mnemval[1].mnemonic = FW_FLOWC_MNEM_CH;
373 flowc->mnemval[1].val = cpu_to_be32(ep->tx_chan);
374 flowc->mnemval[2].mnemonic = FW_FLOWC_MNEM_PORT;
375 flowc->mnemval[2].val = cpu_to_be32(ep->tx_chan);
376 flowc->mnemval[3].mnemonic = FW_FLOWC_MNEM_IQID;
377 flowc->mnemval[3].val = cpu_to_be32(ep->rss_qid);
378 flowc->mnemval[4].mnemonic = FW_FLOWC_MNEM_SNDNXT;
379 flowc->mnemval[4].val = cpu_to_be32(ep->snd_seq);
380 flowc->mnemval[5].mnemonic = FW_FLOWC_MNEM_RCVNXT;
381 flowc->mnemval[5].val = cpu_to_be32(ep->rcv_seq);
382 flowc->mnemval[6].mnemonic = FW_FLOWC_MNEM_SNDBUF;
383 flowc->mnemval[6].val = cpu_to_be32(snd_win);
384 flowc->mnemval[7].mnemonic = FW_FLOWC_MNEM_MSS;
385 flowc->mnemval[7].val = cpu_to_be32(ep->emss);
386 /* Pad WR to 16 byte boundary */
387 flowc->mnemval[8].mnemonic = 0;
388 flowc->mnemval[8].val = 0;
389 for (i = 0; i < 9; i++) {
390 flowc->mnemval[i].r4[0] = 0;
391 flowc->mnemval[i].r4[1] = 0;
392 flowc->mnemval[i].r4[2] = 0;
393 }
394
395 set_wr_txq(skb, CPL_PRIORITY_DATA, ep->txq_idx);
396 c4iw_ofld_send(&ep->com.dev->rdev, skb);
397}
398
399static int send_halfclose(struct c4iw_ep *ep, gfp_t gfp)
400{
401 struct cpl_close_con_req *req;
402 struct sk_buff *skb;
403 int wrlen = roundup(sizeof *req, 16);
404
405 PDBG("%s ep %p tid %u\n", __func__, ep, ep->hwtid);
406 skb = get_skb(NULL, wrlen, gfp);
407 if (!skb) {
408 printk(KERN_ERR MOD "%s - failed to alloc skb\n", __func__);
409 return -ENOMEM;
410 }
411 set_wr_txq(skb, CPL_PRIORITY_DATA, ep->txq_idx);
412 t4_set_arp_err_handler(skb, NULL, arp_failure_discard);
413 req = (struct cpl_close_con_req *) skb_put(skb, wrlen);
414 memset(req, 0, wrlen);
415 INIT_TP_WR(req, ep->hwtid);
416 OPCODE_TID(req) = cpu_to_be32(MK_OPCODE_TID(CPL_CLOSE_CON_REQ,
417 ep->hwtid));
418 return c4iw_l2t_send(&ep->com.dev->rdev, skb, ep->l2t);
419}
420
421static int send_abort(struct c4iw_ep *ep, struct sk_buff *skb, gfp_t gfp)
422{
423 struct cpl_abort_req *req;
424 int wrlen = roundup(sizeof *req, 16);
425
426 PDBG("%s ep %p tid %u\n", __func__, ep, ep->hwtid);
427 skb = get_skb(skb, wrlen, gfp);
428 if (!skb) {
429 printk(KERN_ERR MOD "%s - failed to alloc skb.\n",
430 __func__);
431 return -ENOMEM;
432 }
433 set_wr_txq(skb, CPL_PRIORITY_DATA, ep->txq_idx);
434 t4_set_arp_err_handler(skb, &ep->com.dev->rdev, abort_arp_failure);
435 req = (struct cpl_abort_req *) skb_put(skb, wrlen);
436 memset(req, 0, wrlen);
437 INIT_TP_WR(req, ep->hwtid);
438 OPCODE_TID(req) = cpu_to_be32(MK_OPCODE_TID(CPL_ABORT_REQ, ep->hwtid));
439 req->cmd = CPL_ABORT_SEND_RST;
440 return c4iw_l2t_send(&ep->com.dev->rdev, skb, ep->l2t);
441}
442
443static int send_connect(struct c4iw_ep *ep)
444{
445 struct cpl_act_open_req *req;
446 struct sk_buff *skb;
447 u64 opt0;
448 u32 opt2;
449 unsigned int mtu_idx;
450 int wscale;
451 int wrlen = roundup(sizeof *req, 16);
452
453 PDBG("%s ep %p atid %u\n", __func__, ep, ep->atid);
454
455 skb = get_skb(NULL, wrlen, GFP_KERNEL);
456 if (!skb) {
457 printk(KERN_ERR MOD "%s - failed to alloc skb.\n",
458 __func__);
459 return -ENOMEM;
460 }
d4f1a5c6 461 set_wr_txq(skb, CPL_PRIORITY_SETUP, ep->ctrlq_idx);
cfdda9d7
SW		 462
463 cxgb4_best_mtu(ep->com.dev->rdev.lldi.mtus, ep->mtu, &mtu_idx);
464 wscale = compute_wscale(rcv_win);
465 opt0 = KEEP_ALIVE(1) |
ba6d3925 466 DELACK(1) |
cfdda9d7
SW		 467 WND_SCALE(wscale) |
468 MSS_IDX(mtu_idx) |
469 L2T_IDX(ep->l2t->idx) |
470 TX_CHAN(ep->tx_chan) |
471 SMAC_SEL(ep->smac_idx) |
472 DSCP(ep->tos) |
b48f3b9c 473 ULP_MODE(ULP_MODE_TCPDDP) |
cfdda9d7
SW		 474 RCV_BUFSIZ(rcv_win>>10);
475 opt2 = RX_CHANNEL(0) |
476 RSS_QUEUE_VALID | RSS_QUEUE(ep->rss_qid);
477 if (enable_tcp_timestamps)
478 opt2 |= TSTAMPS_EN(1);
479 if (enable_tcp_sack)
480 opt2 |= SACK_EN(1);
481 if (wscale && enable_tcp_window_scaling)
482 opt2 |= WND_SCALE_EN(1);
483 t4_set_arp_err_handler(skb, NULL, act_open_req_arp_failure);
484
485 req = (struct cpl_act_open_req *) skb_put(skb, wrlen);
486 INIT_TP_WR(req, 0);
487 OPCODE_TID(req) = cpu_to_be32(
488 MK_OPCODE_TID(CPL_ACT_OPEN_REQ, ((ep->rss_qid<<14)|ep->atid)));
489 req->local_port = ep->com.local_addr.sin_port;
490 req->peer_port = ep->com.remote_addr.sin_port;
491 req->local_ip = ep->com.local_addr.sin_addr.s_addr;
492 req->peer_ip = ep->com.remote_addr.sin_addr.s_addr;
493 req->opt0 = cpu_to_be64(opt0);
494 req->params = 0;
495 req->opt2 = cpu_to_be32(opt2);
496 return c4iw_l2t_send(&ep->com.dev->rdev, skb, ep->l2t);
497}
498
499static void send_mpa_req(struct c4iw_ep *ep, struct sk_buff *skb)
500{
501 int mpalen, wrlen;
502 struct fw_ofld_tx_data_wr *req;
503 struct mpa_message *mpa;
504
505 PDBG("%s ep %p tid %u pd_len %d\n", __func__, ep, ep->hwtid, ep->plen);
506
507 BUG_ON(skb_cloned(skb));
508
509 mpalen = sizeof(*mpa) + ep->plen;
510 wrlen = roundup(mpalen + sizeof *req, 16);
511 skb = get_skb(skb, wrlen, GFP_KERNEL);
512 if (!skb) {
513 connect_reply_upcall(ep, -ENOMEM);
514 return;
515 }
516 set_wr_txq(skb, CPL_PRIORITY_DATA, ep->txq_idx);
517
518 req = (struct fw_ofld_tx_data_wr *)skb_put(skb, wrlen);
519 memset(req, 0, wrlen);
520 req->op_to_immdlen = cpu_to_be32(
521 FW_WR_OP(FW_OFLD_TX_DATA_WR) |
522 FW_WR_COMPL(1) |
523 FW_WR_IMMDLEN(mpalen));
524 req->flowid_len16 = cpu_to_be32(
525 FW_WR_FLOWID(ep->hwtid) |
526 FW_WR_LEN16(wrlen >> 4));
527 req->plen = cpu_to_be32(mpalen);
528 req->tunnel_to_proxy = cpu_to_be32(
529 FW_OFLD_TX_DATA_WR_FLUSH(1) |
530 FW_OFLD_TX_DATA_WR_SHOVE(1));
531
532 mpa = (struct mpa_message *)(req + 1);
533 memcpy(mpa->key, MPA_KEY_REQ, sizeof(mpa->key));
534 mpa->flags = (crc_enabled ? MPA_CRC : 0) |
535 (markers_enabled ? MPA_MARKERS : 0);
536 mpa->private_data_size = htons(ep->plen);
537 mpa->revision = mpa_rev;
538
539 if (ep->plen)
540 memcpy(mpa->private_data, ep->mpa_pkt + sizeof(*mpa), ep->plen);
541
542 /*
543 * Reference the mpa skb. This ensures the data area
544 * will remain in memory until the hw acks the tx.
545 * Function fw4_ack() will deref it.
546 */
547 skb_get(skb);
548 t4_set_arp_err_handler(skb, NULL, arp_failure_discard);
549 BUG_ON(ep->mpa_skb);
550 ep->mpa_skb = skb;
551 c4iw_l2t_send(&ep->com.dev->rdev, skb, ep->l2t);
552 start_ep_timer(ep);
553 state_set(&ep->com, MPA_REQ_SENT);
554 ep->mpa_attr.initiator = 1;
555 return;
556}
557
558static int send_mpa_reject(struct c4iw_ep *ep, const void *pdata, u8 plen)
559{
560 int mpalen, wrlen;
561 struct fw_ofld_tx_data_wr *req;
562 struct mpa_message *mpa;
563 struct sk_buff *skb;
564
565 PDBG("%s ep %p tid %u pd_len %d\n", __func__, ep, ep->hwtid, ep->plen);
566
567 mpalen = sizeof(*mpa) + plen;
568 wrlen = roundup(mpalen + sizeof *req, 16);
569
570 skb = get_skb(NULL, wrlen, GFP_KERNEL);
571 if (!skb) {
572 printk(KERN_ERR MOD "%s - cannot alloc skb!\n", __func__);
573 return -ENOMEM;
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 memset(mpa, 0, sizeof(*mpa));
593 memcpy(mpa->key, MPA_KEY_REP, sizeof(mpa->key));
594 mpa->flags = MPA_REJECT;
595 mpa->revision = mpa_rev;
596 mpa->private_data_size = htons(plen);
597 if (plen)
598 memcpy(mpa->private_data, pdata, plen);
599
600 /*
601 * Reference the mpa skb again. This ensures the data area
602 * will remain in memory until the hw acks the tx.
603 * Function fw4_ack() will deref it.
604 */
605 skb_get(skb);
606 set_wr_txq(skb, CPL_PRIORITY_DATA, ep->txq_idx);
607 t4_set_arp_err_handler(skb, NULL, arp_failure_discard);
608 BUG_ON(ep->mpa_skb);
609 ep->mpa_skb = skb;
610 return c4iw_l2t_send(&ep->com.dev->rdev, skb, ep->l2t);
611}
612
613static int send_mpa_reply(struct c4iw_ep *ep, const void *pdata, u8 plen)
614{
615 int mpalen, wrlen;
616 struct fw_ofld_tx_data_wr *req;
617 struct mpa_message *mpa;
618 struct sk_buff *skb;
619
620 PDBG("%s ep %p tid %u pd_len %d\n", __func__, ep, ep->hwtid, ep->plen);
621
622 mpalen = sizeof(*mpa) + plen;
623 wrlen = roundup(mpalen + sizeof *req, 16);
624
625 skb = get_skb(NULL, wrlen, GFP_KERNEL);
626 if (!skb) {
627 printk(KERN_ERR MOD "%s - cannot alloc skb!\n", __func__);
628 return -ENOMEM;
629 }
630 set_wr_txq(skb, CPL_PRIORITY_DATA, ep->txq_idx);
631
632 req = (struct fw_ofld_tx_data_wr *) skb_put(skb, wrlen);
633 memset(req, 0, wrlen);
634 req->op_to_immdlen = cpu_to_be32(
635 FW_WR_OP(FW_OFLD_TX_DATA_WR) |
636 FW_WR_COMPL(1) |
637 FW_WR_IMMDLEN(mpalen));
638 req->flowid_len16 = cpu_to_be32(
639 FW_WR_FLOWID(ep->hwtid) |
640 FW_WR_LEN16(wrlen >> 4));
641 req->plen = cpu_to_be32(mpalen);
642 req->tunnel_to_proxy = cpu_to_be32(
643 FW_OFLD_TX_DATA_WR_FLUSH(1) |
644 FW_OFLD_TX_DATA_WR_SHOVE(1));
645
646 mpa = (struct mpa_message *)(req + 1);
647 memset(mpa, 0, sizeof(*mpa));
648 memcpy(mpa->key, MPA_KEY_REP, sizeof(mpa->key));
649 mpa->flags = (ep->mpa_attr.crc_enabled ? MPA_CRC : 0) |
650 (markers_enabled ? MPA_MARKERS : 0);
651 mpa->revision = mpa_rev;
652 mpa->private_data_size = htons(plen);
653 if (plen)
654 memcpy(mpa->private_data, pdata, plen);
655
656 /*
657 * Reference the mpa skb. This ensures the data area
658 * will remain in memory until the hw acks the tx.
659 * Function fw4_ack() will deref it.
660 */
661 skb_get(skb);
662 t4_set_arp_err_handler(skb, NULL, arp_failure_discard);
663 ep->mpa_skb = skb;
664 state_set(&ep->com, MPA_REP_SENT);
665 return c4iw_l2t_send(&ep->com.dev->rdev, skb, ep->l2t);
666}
667
668static int act_establish(struct c4iw_dev *dev, struct sk_buff *skb)
669{
670 struct c4iw_ep *ep;
671 struct cpl_act_establish *req = cplhdr(skb);
672 unsigned int tid = GET_TID(req);
673 unsigned int atid = GET_TID_TID(ntohl(req->tos_atid));
674 struct tid_info *t = dev->rdev.lldi.tids;
675
676 ep = lookup_atid(t, atid);
677
678 PDBG("%s ep %p tid %u snd_isn %u rcv_isn %u\n", __func__, ep, tid,
679 be32_to_cpu(req->snd_isn), be32_to_cpu(req->rcv_isn));
680
681 dst_confirm(ep->dst);
682
683 /* setup the hwtid for this connection */
684 ep->hwtid = tid;
685 cxgb4_insert_tid(t, ep, tid);
686
687 ep->snd_seq = be32_to_cpu(req->snd_isn);
688 ep->rcv_seq = be32_to_cpu(req->rcv_isn);
689
690 set_emss(ep, ntohs(req->tcp_opt));
691
692 /* dealloc the atid */
693 cxgb4_free_atid(t, atid);
694
695 /* start MPA negotiation */
696 send_flowc(ep, NULL);
697 send_mpa_req(ep, skb);
698
699 return 0;
700}
701
702static void close_complete_upcall(struct c4iw_ep *ep)
703{
704 struct iw_cm_event event;
705
706 PDBG("%s ep %p tid %u\n", __func__, ep, ep->hwtid);
707 memset(&event, 0, sizeof(event));
708 event.event = IW_CM_EVENT_CLOSE;
709 if (ep->com.cm_id) {
710 PDBG("close complete delivered ep %p cm_id %p tid %u\n",
711 ep, ep->com.cm_id, ep->hwtid);
712 ep->com.cm_id->event_handler(ep->com.cm_id, &event);
713 ep->com.cm_id->rem_ref(ep->com.cm_id);
714 ep->com.cm_id = NULL;
715 ep->com.qp = NULL;
716 }
717}
718
719static int abort_connection(struct c4iw_ep *ep, struct sk_buff *skb, gfp_t gfp)
720{
721 PDBG("%s ep %p tid %u\n", __func__, ep, ep->hwtid);
722 close_complete_upcall(ep);
723 state_set(&ep->com, ABORTING);
724 return send_abort(ep, skb, gfp);
725}
726
727static void peer_close_upcall(struct c4iw_ep *ep)
728{
729 struct iw_cm_event event;
730
731 PDBG("%s ep %p tid %u\n", __func__, ep, ep->hwtid);
732 memset(&event, 0, sizeof(event));
733 event.event = IW_CM_EVENT_DISCONNECT;
734 if (ep->com.cm_id) {
735 PDBG("peer close delivered ep %p cm_id %p tid %u\n",
736 ep, ep->com.cm_id, ep->hwtid);
737 ep->com.cm_id->event_handler(ep->com.cm_id, &event);
738 }
739}
740
741static void peer_abort_upcall(struct c4iw_ep *ep)
742{
743 struct iw_cm_event event;
744
745 PDBG("%s ep %p tid %u\n", __func__, ep, ep->hwtid);
746 memset(&event, 0, sizeof(event));
747 event.event = IW_CM_EVENT_CLOSE;
748 event.status = -ECONNRESET;
749 if (ep->com.cm_id) {
750 PDBG("abort delivered ep %p cm_id %p tid %u\n", ep,
751 ep->com.cm_id, ep->hwtid);
752 ep->com.cm_id->event_handler(ep->com.cm_id, &event);
753 ep->com.cm_id->rem_ref(ep->com.cm_id);
754 ep->com.cm_id = NULL;
755 ep->com.qp = NULL;
756 }
757}
758
759static void connect_reply_upcall(struct c4iw_ep *ep, int status)
760{
761 struct iw_cm_event event;
762
763 PDBG("%s ep %p tid %u status %d\n", __func__, ep, ep->hwtid, status);
764 memset(&event, 0, sizeof(event));
765 event.event = IW_CM_EVENT_CONNECT_REPLY;
766 event.status = status;
767 event.local_addr = ep->com.local_addr;
768 event.remote_addr = ep->com.remote_addr;
769
770 if ((status == 0) || (status == -ECONNREFUSED)) {
771 event.private_data_len = ep->plen;
772 event.private_data = ep->mpa_pkt + sizeof(struct mpa_message);
773 }
85963e4c
RD		 774
775 PDBG("%s ep %p tid %u status %d\n", __func__, ep,
776 ep->hwtid, status);
777 ep->com.cm_id->event_handler(ep->com.cm_id, &event);
778
cfdda9d7
SW		 779 if (status < 0) {
780 ep->com.cm_id->rem_ref(ep->com.cm_id);
781 ep->com.cm_id = NULL;
782 ep->com.qp = NULL;
783 }
784}
785
786static void connect_request_upcall(struct c4iw_ep *ep)
787{
788 struct iw_cm_event event;
789
790 PDBG("%s ep %p tid %u\n", __func__, ep, ep->hwtid);
791 memset(&event, 0, sizeof(event));
792 event.event = IW_CM_EVENT_CONNECT_REQUEST;
793 event.local_addr = ep->com.local_addr;
794 event.remote_addr = ep->com.remote_addr;
795 event.private_data_len = ep->plen;
796 event.private_data = ep->mpa_pkt + sizeof(struct mpa_message);
797 event.provider_data = ep;
798 if (state_read(&ep->parent_ep->com) != DEAD) {
799 c4iw_get_ep(&ep->com);
800 ep->parent_ep->com.cm_id->event_handler(
801 ep->parent_ep->com.cm_id,
802 &event);
803 }
804 c4iw_put_ep(&ep->parent_ep->com);
805 ep->parent_ep = NULL;
806}
807
808static void established_upcall(struct c4iw_ep *ep)
809{
810 struct iw_cm_event event;
811
812 PDBG("%s ep %p tid %u\n", __func__, ep, ep->hwtid);
813 memset(&event, 0, sizeof(event));
814 event.event = IW_CM_EVENT_ESTABLISHED;
815 if (ep->com.cm_id) {
816 PDBG("%s ep %p tid %u\n", __func__, ep, ep->hwtid);
817 ep->com.cm_id->event_handler(ep->com.cm_id, &event);
818 }
819}
820
821static int update_rx_credits(struct c4iw_ep *ep, u32 credits)
822{
823 struct cpl_rx_data_ack *req;
824 struct sk_buff *skb;
825 int wrlen = roundup(sizeof *req, 16);
826
827 PDBG("%s ep %p tid %u credits %u\n", __func__, ep, ep->hwtid, credits);
828 skb = get_skb(NULL, wrlen, GFP_KERNEL);
829 if (!skb) {
830 printk(KERN_ERR MOD "update_rx_credits - cannot alloc skb!\n");
831 return 0;
832 }
833
834 req = (struct cpl_rx_data_ack *) skb_put(skb, wrlen);
835 memset(req, 0, wrlen);
836 INIT_TP_WR(req, ep->hwtid);
837 OPCODE_TID(req) = cpu_to_be32(MK_OPCODE_TID(CPL_RX_DATA_ACK,
838 ep->hwtid));
ba6d3925
SW		 839 req->credit_dack = cpu_to_be32(credits | RX_FORCE_ACK(1) |
840 F_RX_DACK_CHANGE |
841 V_RX_DACK_MODE(dack_mode));
d4f1a5c6 842 set_wr_txq(skb, CPL_PRIORITY_ACK, ep->ctrlq_idx);
cfdda9d7
SW		 843 c4iw_ofld_send(&ep->com.dev->rdev, skb);
844 return credits;
845}
846
847static void process_mpa_reply(struct c4iw_ep *ep, struct sk_buff *skb)
848{
849 struct mpa_message *mpa;
850 u16 plen;
851 struct c4iw_qp_attributes attrs;
852 enum c4iw_qp_attr_mask mask;
853 int err;
854
855 PDBG("%s ep %p tid %u\n", __func__, ep, ep->hwtid);
856
857 /*
858 * Stop mpa timer. If it expired, then the state has
859 * changed and we bail since ep_timeout already aborted
860 * the connection.
861 */
862 stop_ep_timer(ep);
863 if (state_read(&ep->com) != MPA_REQ_SENT)
864 return;
865
866 /*
867 * If we get more than the supported amount of private data
868 * then we must fail this connection.
869 */
870 if (ep->mpa_pkt_len + skb->len > sizeof(ep->mpa_pkt)) {
871 err = -EINVAL;
872 goto err;
873 }
874
875 /*
876 * copy the new data into our accumulation buffer.
877 */
878 skb_copy_from_linear_data(skb, &(ep->mpa_pkt[ep->mpa_pkt_len]),
879 skb->len);
880 ep->mpa_pkt_len += skb->len;
881
882 /*
883 * if we don't even have the mpa message, then bail.
884 */
885 if (ep->mpa_pkt_len < sizeof(*mpa))
886 return;
887 mpa = (struct mpa_message *) ep->mpa_pkt;
888
889 /* Validate MPA header. */
890 if (mpa->revision != mpa_rev) {
891 err = -EPROTO;
892 goto err;
893 }
894 if (memcmp(mpa->key, MPA_KEY_REP, sizeof(mpa->key))) {
895 err = -EPROTO;
896 goto err;
897 }
898
899 plen = ntohs(mpa->private_data_size);
900
901 /*
902 * Fail if there's too much private data.
903 */
904 if (plen > MPA_MAX_PRIVATE_DATA) {
905 err = -EPROTO;
906 goto err;
907 }
908
909 /*
910 * If plen does not account for pkt size
911 */
912 if (ep->mpa_pkt_len > (sizeof(*mpa) + plen)) {
913 err = -EPROTO;
914 goto err;
915 }
916
917 ep->plen = (u8) plen;
918
919 /*
920 * If we don't have all the pdata yet, then bail.
921 * We'll continue process when more data arrives.
922 */
923 if (ep->mpa_pkt_len < (sizeof(*mpa) + plen))
924 return;
925
926 if (mpa->flags & MPA_REJECT) {
927 err = -ECONNREFUSED;
928 goto err;
929 }
930
931 /*
932 * If we get here we have accumulated the entire mpa
933 * start reply message including private data. And
934 * the MPA header is valid.
935 */
936 state_set(&ep->com, FPDU_MODE);
937 ep->mpa_attr.crc_enabled = (mpa->flags & MPA_CRC) | crc_enabled ? 1 : 0;
938 ep->mpa_attr.recv_marker_enabled = markers_enabled;
939 ep->mpa_attr.xmit_marker_enabled = mpa->flags & MPA_MARKERS ? 1 : 0;
940 ep->mpa_attr.version = mpa_rev;
941 ep->mpa_attr.p2p_type = peer2peer ? p2p_type :
942 FW_RI_INIT_P2PTYPE_DISABLED;
943 PDBG("%s - crc_enabled=%d, recv_marker_enabled=%d, "
944 "xmit_marker_enabled=%d, version=%d\n", __func__,
945 ep->mpa_attr.crc_enabled, ep->mpa_attr.recv_marker_enabled,
946 ep->mpa_attr.xmit_marker_enabled, ep->mpa_attr.version);
947
948 attrs.mpa_attr = ep->mpa_attr;
949 attrs.max_ird = ep->ird;
950 attrs.max_ord = ep->ord;
951 attrs.llp_stream_handle = ep;
952 attrs.next_state = C4IW_QP_STATE_RTS;
953
954 mask = C4IW_QP_ATTR_NEXT_STATE |
955 C4IW_QP_ATTR_LLP_STREAM_HANDLE | C4IW_QP_ATTR_MPA_ATTR |
956 C4IW_QP_ATTR_MAX_IRD | C4IW_QP_ATTR_MAX_ORD;
957
958 /* bind QP and TID with INIT_WR */
959 err = c4iw_modify_qp(ep->com.qp->rhp,
960 ep->com.qp, mask, &attrs, 1);
961 if (err)
962 goto err;
963 goto out;
964err:
b21ef16a
SW		 965 state_set(&ep->com, ABORTING);
966 send_abort(ep, skb, GFP_KERNEL);
cfdda9d7
SW		 967out:
968 connect_reply_upcall(ep, err);
969 return;
970}
971
972static void process_mpa_request(struct c4iw_ep *ep, struct sk_buff *skb)
973{
974 struct mpa_message *mpa;
975 u16 plen;
976
977 PDBG("%s ep %p tid %u\n", __func__, ep, ep->hwtid);
978
979 if (state_read(&ep->com) != MPA_REQ_WAIT)
980 return;
981
982 /*
983 * If we get more than the supported amount of private data
984 * then we must fail this connection.
985 */
986 if (ep->mpa_pkt_len + skb->len > sizeof(ep->mpa_pkt)) {
987 stop_ep_timer(ep);
988 abort_connection(ep, skb, GFP_KERNEL);
989 return;
990 }
991
992 PDBG("%s enter (%s line %u)\n", __func__, __FILE__, __LINE__);
993
994 /*
995 * Copy the new data into our accumulation buffer.
996 */
997 skb_copy_from_linear_data(skb, &(ep->mpa_pkt[ep->mpa_pkt_len]),
998 skb->len);
999 ep->mpa_pkt_len += skb->len;
1000
1001 /*
1002 * If we don't even have the mpa message, then bail.
1003 * We'll continue process when more data arrives.
1004 */
1005 if (ep->mpa_pkt_len < sizeof(*mpa))
1006 return;
1007
1008 PDBG("%s enter (%s line %u)\n", __func__, __FILE__, __LINE__);
1009 stop_ep_timer(ep);
1010 mpa = (struct mpa_message *) ep->mpa_pkt;
1011
1012 /*
1013 * Validate MPA Header.
1014 */
1015 if (mpa->revision != mpa_rev) {
1016 abort_connection(ep, skb, GFP_KERNEL);
1017 return;
1018 }
1019
1020 if (memcmp(mpa->key, MPA_KEY_REQ, sizeof(mpa->key))) {
1021 abort_connection(ep, skb, GFP_KERNEL);
1022 return;
1023 }
1024
1025 plen = ntohs(mpa->private_data_size);
1026
1027 /*
1028 * Fail if there's too much private data.
1029 */
1030 if (plen > MPA_MAX_PRIVATE_DATA) {
1031 abort_connection(ep, skb, GFP_KERNEL);
1032 return;
1033 }
1034
1035 /*
1036 * If plen does not account for pkt size
1037 */
1038 if (ep->mpa_pkt_len > (sizeof(*mpa) + plen)) {
1039 abort_connection(ep, skb, GFP_KERNEL);
1040 return;
1041 }
1042 ep->plen = (u8) plen;
1043
1044 /*
1045 * If we don't have all the pdata yet, then bail.
1046 */
1047 if (ep->mpa_pkt_len < (sizeof(*mpa) + plen))
1048 return;
1049
1050 /*
1051 * If we get here we have accumulated the entire mpa
1052 * start reply message including private data.
1053 */
1054 ep->mpa_attr.initiator = 0;
1055 ep->mpa_attr.crc_enabled = (mpa->flags & MPA_CRC) | crc_enabled ? 1 : 0;
1056 ep->mpa_attr.recv_marker_enabled = markers_enabled;
1057 ep->mpa_attr.xmit_marker_enabled = mpa->flags & MPA_MARKERS ? 1 : 0;
1058 ep->mpa_attr.version = mpa_rev;
1059 ep->mpa_attr.p2p_type = peer2peer ? p2p_type :
1060 FW_RI_INIT_P2PTYPE_DISABLED;
1061 PDBG("%s - crc_enabled=%d, recv_marker_enabled=%d, "
1062 "xmit_marker_enabled=%d, version=%d p2p_type=%d\n", __func__,
1063 ep->mpa_attr.crc_enabled, ep->mpa_attr.recv_marker_enabled,
1064 ep->mpa_attr.xmit_marker_enabled, ep->mpa_attr.version,
1065 ep->mpa_attr.p2p_type);
1066
1067 state_set(&ep->com, MPA_REQ_RCVD);
1068
1069 /* drive upcall */
1070 connect_request_upcall(ep);
1071 return;
1072}
1073
1074static int rx_data(struct c4iw_dev *dev, struct sk_buff *skb)
1075{
1076 struct c4iw_ep *ep;
1077 struct cpl_rx_data *hdr = cplhdr(skb);
1078 unsigned int dlen = ntohs(hdr->len);
1079 unsigned int tid = GET_TID(hdr);
1080 struct tid_info *t = dev->rdev.lldi.tids;
1081
1082 ep = lookup_tid(t, tid);
1083 PDBG("%s ep %p tid %u dlen %u\n", __func__, ep, ep->hwtid, dlen);
1084 skb_pull(skb, sizeof(*hdr));
1085 skb_trim(skb, dlen);
1086
1087 ep->rcv_seq += dlen;
1088 BUG_ON(ep->rcv_seq != (ntohl(hdr->seq) + dlen));
1089
1090 /* update RX credits */
1091 update_rx_credits(ep, dlen);
1092
1093 switch (state_read(&ep->com)) {
1094 case MPA_REQ_SENT:
1095 process_mpa_reply(ep, skb);
1096 break;
1097 case MPA_REQ_WAIT:
1098 process_mpa_request(ep, skb);
1099 break;
1100 case MPA_REP_SENT:
1101 break;
1102 default:
1103 printk(KERN_ERR MOD "%s Unexpected streaming data."
1104 " ep %p state %d tid %u\n",
1105 __func__, ep, state_read(&ep->com), ep->hwtid);
1106
1107 /*
1108 * The ep will timeout and inform the ULP of the failure.
1109 * See ep_timeout().
1110 */
1111 break;
1112 }
1113 return 0;
1114}
1115
1116static int abort_rpl(struct c4iw_dev *dev, struct sk_buff *skb)
1117{
1118 struct c4iw_ep *ep;
1119 struct cpl_abort_rpl_rss *rpl = cplhdr(skb);
cfdda9d7
SW		 1120 int release = 0;
1121 unsigned int tid = GET_TID(rpl);
1122 struct tid_info *t = dev->rdev.lldi.tids;
1123
1124 ep = lookup_tid(t, tid);
1125 PDBG("%s ep %p tid %u\n", __func__, ep, ep->hwtid);
1126 BUG_ON(!ep);
2f5b48c3 1127 mutex_lock(&ep->com.mutex);
cfdda9d7
SW		 1128 switch (ep->com.state) {
1129 case ABORTING:
1130 __state_set(&ep->com, DEAD);
1131 release = 1;
1132 break;
1133 default:
1134 printk(KERN_ERR "%s ep %p state %d\n",
1135 __func__, ep, ep->com.state);
1136 break;
1137 }
2f5b48c3 1138 mutex_unlock(&ep->com.mutex);
cfdda9d7
SW		 1139
1140 if (release)
1141 release_ep_resources(ep);
1142 return 0;
1143}
1144
1145/*
1146 * Return whether a failed active open has allocated a TID
1147 */
1148static inline int act_open_has_tid(int status)
1149{
1150 return status != CPL_ERR_TCAM_FULL && status != CPL_ERR_CONN_EXIST &&
1151 status != CPL_ERR_ARP_MISS;
1152}
1153
1154static int act_open_rpl(struct c4iw_dev *dev, struct sk_buff *skb)
1155{
1156 struct c4iw_ep *ep;
1157 struct cpl_act_open_rpl *rpl = cplhdr(skb);
1158 unsigned int atid = GET_TID_TID(GET_AOPEN_ATID(
1159 ntohl(rpl->atid_status)));
1160 struct tid_info *t = dev->rdev.lldi.tids;
1161 int status = GET_AOPEN_STATUS(ntohl(rpl->atid_status));
1162
1163 ep = lookup_atid(t, atid);
1164
1165 PDBG("%s ep %p atid %u status %u errno %d\n", __func__, ep, atid,
1166 status, status2errno(status));
1167
1168 if (status == CPL_ERR_RTX_NEG_ADVICE) {
1169 printk(KERN_WARNING MOD "Connection problems for atid %u\n",
1170 atid);
1171 return 0;
1172 }
1173
1174 connect_reply_upcall(ep, status2errno(status));
1175 state_set(&ep->com, DEAD);
1176
1177 if (status && act_open_has_tid(status))
1178 cxgb4_remove_tid(ep->com.dev->rdev.lldi.tids, 0, GET_TID(rpl));
1179
1180 cxgb4_free_atid(t, atid);
1181 dst_release(ep->dst);
1182 cxgb4_l2t_release(ep->l2t);
1183 c4iw_put_ep(&ep->com);
1184
1185 return 0;
1186}
1187
1188static int pass_open_rpl(struct c4iw_dev *dev, struct sk_buff *skb)
1189{
1190 struct cpl_pass_open_rpl *rpl = cplhdr(skb);
1191 struct tid_info *t = dev->rdev.lldi.tids;
1192 unsigned int stid = GET_TID(rpl);
1193 struct c4iw_listen_ep *ep = lookup_stid(t, stid);
1194
1195 if (!ep) {
1196 printk(KERN_ERR MOD "stid %d lookup failure!\n", stid);
1197 return 0;
1198 }
1199 PDBG("%s ep %p status %d error %d\n", __func__, ep,
1200 rpl->status, status2errno(rpl->status));
aadc4df3
SW		 1201 ep->com.wr_wait.ret = status2errno(rpl->status);
1202 ep->com.wr_wait.done = 1;
1203 wake_up(&ep->com.wr_wait.wait);
cfdda9d7
SW		 1204
1205 return 0;
1206}
1207
1208static int listen_stop(struct c4iw_listen_ep *ep)
1209{
1210 struct sk_buff *skb;
1211 struct cpl_close_listsvr_req *req;
1212
1213 PDBG("%s ep %p\n", __func__, ep);
1214 skb = get_skb(NULL, sizeof(*req), GFP_KERNEL);
1215 if (!skb) {
1216 printk(KERN_ERR MOD "%s - failed to alloc skb\n", __func__);
1217 return -ENOMEM;
1218 }
1219 req = (struct cpl_close_listsvr_req *) skb_put(skb, sizeof(*req));
1220 INIT_TP_WR(req, 0);
1221 OPCODE_TID(req) = cpu_to_be32(MK_OPCODE_TID(CPL_CLOSE_LISTSRV_REQ,
1222 ep->stid));
1223 req->reply_ctrl = cpu_to_be16(
1224 QUEUENO(ep->com.dev->rdev.lldi.rxq_ids[0]));
1225 set_wr_txq(skb, CPL_PRIORITY_SETUP, 0);
1226 return c4iw_ofld_send(&ep->com.dev->rdev, skb);
1227}
1228
1229static int close_listsrv_rpl(struct c4iw_dev *dev, struct sk_buff *skb)
1230{
1231 struct cpl_close_listsvr_rpl *rpl = cplhdr(skb);
1232 struct tid_info *t = dev->rdev.lldi.tids;
1233 unsigned int stid = GET_TID(rpl);
1234 struct c4iw_listen_ep *ep = lookup_stid(t, stid);
1235
1236 PDBG("%s ep %p\n", __func__, ep);
aadc4df3
SW		 1237 ep->com.wr_wait.ret = status2errno(rpl->status);
1238 ep->com.wr_wait.done = 1;
1239 wake_up(&ep->com.wr_wait.wait);
cfdda9d7
SW		 1240 return 0;
1241}
1242
1243static void accept_cr(struct c4iw_ep *ep, __be32 peer_ip, struct sk_buff *skb,
1244 struct cpl_pass_accept_req *req)
1245{
1246 struct cpl_pass_accept_rpl *rpl;
1247 unsigned int mtu_idx;
1248 u64 opt0;
1249 u32 opt2;
1250 int wscale;
1251
1252 PDBG("%s ep %p tid %u\n", __func__, ep, ep->hwtid);
1253 BUG_ON(skb_cloned(skb));
1254 skb_trim(skb, sizeof(*rpl));
1255 skb_get(skb);
1256 cxgb4_best_mtu(ep->com.dev->rdev.lldi.mtus, ep->mtu, &mtu_idx);
1257 wscale = compute_wscale(rcv_win);
1258 opt0 = KEEP_ALIVE(1) |
ba6d3925 1259 DELACK(1) |
cfdda9d7
SW		 1260 WND_SCALE(wscale) |
1261 MSS_IDX(mtu_idx) |
1262 L2T_IDX(ep->l2t->idx) |
1263 TX_CHAN(ep->tx_chan) |
1264 SMAC_SEL(ep->smac_idx) |
1265 DSCP(ep->tos) |
b48f3b9c 1266 ULP_MODE(ULP_MODE_TCPDDP) |
cfdda9d7
SW		 1267 RCV_BUFSIZ(rcv_win>>10);
1268 opt2 = RX_CHANNEL(0) |
1269 RSS_QUEUE_VALID | RSS_QUEUE(ep->rss_qid);
1270
1271 if (enable_tcp_timestamps && req->tcpopt.tstamp)
1272 opt2 |= TSTAMPS_EN(1);
1273 if (enable_tcp_sack && req->tcpopt.sack)
1274 opt2 |= SACK_EN(1);
1275 if (wscale && enable_tcp_window_scaling)
1276 opt2 |= WND_SCALE_EN(1);
1277
1278 rpl = cplhdr(skb);
1279 INIT_TP_WR(rpl, ep->hwtid);
1280 OPCODE_TID(rpl) = cpu_to_be32(MK_OPCODE_TID(CPL_PASS_ACCEPT_RPL,
1281 ep->hwtid));
1282 rpl->opt0 = cpu_to_be64(opt0);
1283 rpl->opt2 = cpu_to_be32(opt2);
d4f1a5c6 1284 set_wr_txq(skb, CPL_PRIORITY_SETUP, ep->ctrlq_idx);
cfdda9d7
SW		 1285 c4iw_l2t_send(&ep->com.dev->rdev, skb, ep->l2t);
1286
1287 return;
1288}
1289
1290static void reject_cr(struct c4iw_dev *dev, u32 hwtid, __be32 peer_ip,
1291 struct sk_buff *skb)
1292{
1293 PDBG("%s c4iw_dev %p tid %u peer_ip %x\n", __func__, dev, hwtid,
1294 peer_ip);
1295 BUG_ON(skb_cloned(skb));
1296 skb_trim(skb, sizeof(struct cpl_tid_release));
1297 skb_get(skb);
1298 release_tid(&dev->rdev, hwtid, skb);
1299 return;
1300}
1301
1302static void get_4tuple(struct cpl_pass_accept_req *req,
1303 __be32 *local_ip, __be32 *peer_ip,
1304 __be16 *local_port, __be16 *peer_port)
1305{
1306 int eth_len = G_ETH_HDR_LEN(be32_to_cpu(req->hdr_len));
1307 int ip_len = G_IP_HDR_LEN(be32_to_cpu(req->hdr_len));
1308 struct iphdr *ip = (struct iphdr *)((u8 *)(req + 1) + eth_len);
1309 struct tcphdr *tcp = (struct tcphdr *)
1310 ((u8 *)(req + 1) + eth_len + ip_len);
1311
1312 PDBG("%s saddr 0x%x daddr 0x%x sport %u dport %u\n", __func__,
1313 ntohl(ip->saddr), ntohl(ip->daddr), ntohs(tcp->source),
1314 ntohs(tcp->dest));
1315
1316 *peer_ip = ip->saddr;
1317 *local_ip = ip->daddr;
1318 *peer_port = tcp->source;
1319 *local_port = tcp->dest;
1320
1321 return;
1322}
1323
1324static int pass_accept_req(struct c4iw_dev *dev, struct sk_buff *skb)
1325{
1326 struct c4iw_ep *child_ep, *parent_ep;
1327 struct cpl_pass_accept_req *req = cplhdr(skb);
1328 unsigned int stid = GET_POPEN_TID(ntohl(req->tos_stid));
1329 struct tid_info *t = dev->rdev.lldi.tids;
1330 unsigned int hwtid = GET_TID(req);
1331 struct dst_entry *dst;
1332 struct l2t_entry *l2t;
1333 struct rtable *rt;
1334 __be32 local_ip, peer_ip;
1335 __be16 local_port, peer_port;
1336 struct net_device *pdev;
1337 u32 tx_chan, smac_idx;
1338 u16 rss_qid;
1339 u32 mtu;
1340 int step;
d4f1a5c6 1341 int txq_idx, ctrlq_idx;
cfdda9d7
SW		 1342
1343 parent_ep = lookup_stid(t, stid);
1344 PDBG("%s parent ep %p tid %u\n", __func__, parent_ep, hwtid);
1345
1346 get_4tuple(req, &local_ip, &peer_ip, &local_port, &peer_port);
1347
1348 if (state_read(&parent_ep->com) != LISTEN) {
1349 printk(KERN_ERR "%s - listening ep not in LISTEN\n",
1350 __func__);
1351 goto reject;
1352 }
1353
1354 /* Find output route */
1355 rt = find_route(dev, local_ip, peer_ip, local_port, peer_port,
1356 GET_POPEN_TOS(ntohl(req->tos_stid)));
1357 if (!rt) {
1358 printk(KERN_ERR MOD "%s - failed to find dst entry!\n",
1359 __func__);
1360 goto reject;
1361 }
d8d1f30b 1362 dst = &rt->dst;
cfdda9d7
SW		 1363 if (dst->neighbour->dev->flags & IFF_LOOPBACK) {
1364 pdev = ip_dev_find(&init_net, peer_ip);
1365 BUG_ON(!pdev);
1366 l2t = cxgb4_l2t_get(dev->rdev.lldi.l2t, dst->neighbour,
1367 pdev, 0);
1368 mtu = pdev->mtu;
1369 tx_chan = cxgb4_port_chan(pdev);
2c5934bf 1370 smac_idx = (cxgb4_port_viid(pdev) & 0x7F) << 1;
cfdda9d7
SW		 1371 step = dev->rdev.lldi.ntxq / dev->rdev.lldi.nchan;
1372 txq_idx = cxgb4_port_idx(pdev) * step;
d4f1a5c6 1373 ctrlq_idx = cxgb4_port_idx(pdev);
cfdda9d7
SW		 1374 step = dev->rdev.lldi.nrxq / dev->rdev.lldi.nchan;
1375 rss_qid = dev->rdev.lldi.rxq_ids[cxgb4_port_idx(pdev) * step];
1376 dev_put(pdev);
1377 } else {
1378 l2t = cxgb4_l2t_get(dev->rdev.lldi.l2t, dst->neighbour,
1379 dst->neighbour->dev, 0);
1380 mtu = dst_mtu(dst);
1381 tx_chan = cxgb4_port_chan(dst->neighbour->dev);
2c5934bf 1382 smac_idx = (cxgb4_port_viid(dst->neighbour->dev) & 0x7F) << 1;
cfdda9d7
SW		 1383 step = dev->rdev.lldi.ntxq / dev->rdev.lldi.nchan;
1384 txq_idx = cxgb4_port_idx(dst->neighbour->dev) * step;
d4f1a5c6 1385 ctrlq_idx = cxgb4_port_idx(dst->neighbour->dev);
cfdda9d7
SW		 1386 step = dev->rdev.lldi.nrxq / dev->rdev.lldi.nchan;
1387 rss_qid = dev->rdev.lldi.rxq_ids[
1388 cxgb4_port_idx(dst->neighbour->dev) * step];
1389 }
1390 if (!l2t) {
1391 printk(KERN_ERR MOD "%s - failed to allocate l2t entry!\n",
1392 __func__);
1393 dst_release(dst);
1394 goto reject;
1395 }
1396
1397 child_ep = alloc_ep(sizeof(*child_ep), GFP_KERNEL);
1398 if (!child_ep) {
1399 printk(KERN_ERR MOD "%s - failed to allocate ep entry!\n",
1400 __func__);
1401 cxgb4_l2t_release(l2t);
1402 dst_release(dst);
1403 goto reject;
1404 }
1405 state_set(&child_ep->com, CONNECTING);
1406 child_ep->com.dev = dev;
1407 child_ep->com.cm_id = NULL;
1408 child_ep->com.local_addr.sin_family = PF_INET;
1409 child_ep->com.local_addr.sin_port = local_port;
1410 child_ep->com.local_addr.sin_addr.s_addr = local_ip;
1411 child_ep->com.remote_addr.sin_family = PF_INET;
1412 child_ep->com.remote_addr.sin_port = peer_port;
1413 child_ep->com.remote_addr.sin_addr.s_addr = peer_ip;
1414 c4iw_get_ep(&parent_ep->com);
1415 child_ep->parent_ep = parent_ep;
1416 child_ep->tos = GET_POPEN_TOS(ntohl(req->tos_stid));
1417 child_ep->l2t = l2t;
1418 child_ep->dst = dst;
1419 child_ep->hwtid = hwtid;
1420 child_ep->tx_chan = tx_chan;
1421 child_ep->smac_idx = smac_idx;
1422 child_ep->rss_qid = rss_qid;
1423 child_ep->mtu = mtu;
1424 child_ep->txq_idx = txq_idx;
d4f1a5c6 1425 child_ep->ctrlq_idx = ctrlq_idx;
cfdda9d7
SW		 1426
1427 PDBG("%s tx_chan %u smac_idx %u rss_qid %u\n", __func__,
1428 tx_chan, smac_idx, rss_qid);
1429
1430 init_timer(&child_ep->timer);
1431 cxgb4_insert_tid(t, child_ep, hwtid);
1432 accept_cr(child_ep, peer_ip, skb, req);
1433 goto out;
1434reject:
1435 reject_cr(dev, hwtid, peer_ip, skb);
1436out:
1437 return 0;
1438}
1439
1440static int pass_establish(struct c4iw_dev *dev, struct sk_buff *skb)
1441{
1442 struct c4iw_ep *ep;
1443 struct cpl_pass_establish *req = cplhdr(skb);
1444 struct tid_info *t = dev->rdev.lldi.tids;
1445 unsigned int tid = GET_TID(req);
1446
1447 ep = lookup_tid(t, tid);
1448 PDBG("%s ep %p tid %u\n", __func__, ep, ep->hwtid);
1449 ep->snd_seq = be32_to_cpu(req->snd_isn);
1450 ep->rcv_seq = be32_to_cpu(req->rcv_isn);
1451
1452 set_emss(ep, ntohs(req->tcp_opt));
1453
1454 dst_confirm(ep->dst);
1455 state_set(&ep->com, MPA_REQ_WAIT);
1456 start_ep_timer(ep);
1457 send_flowc(ep, skb);
1458
1459 return 0;
1460}
1461
1462static int peer_close(struct c4iw_dev *dev, struct sk_buff *skb)
1463{
1464 struct cpl_peer_close *hdr = cplhdr(skb);
1465 struct c4iw_ep *ep;
1466 struct c4iw_qp_attributes attrs;
cfdda9d7
SW		 1467 int disconnect = 1;
1468 int release = 0;
1469 int closing = 0;
1470 struct tid_info *t = dev->rdev.lldi.tids;
1471 unsigned int tid = GET_TID(hdr);
cfdda9d7
SW		 1472
1473 ep = lookup_tid(t, tid);
1474 PDBG("%s ep %p tid %u\n", __func__, ep, ep->hwtid);
1475 dst_confirm(ep->dst);
1476
2f5b48c3 1477 mutex_lock(&ep->com.mutex);
cfdda9d7
SW		 1478 switch (ep->com.state) {
1479 case MPA_REQ_WAIT:
1480 __state_set(&ep->com, CLOSING);
1481 break;
1482 case MPA_REQ_SENT:
1483 __state_set(&ep->com, CLOSING);
1484 connect_reply_upcall(ep, -ECONNRESET);
1485 break;
1486 case MPA_REQ_RCVD:
1487
1488 /*
1489 * We're gonna mark this puppy DEAD, but keep
1490 * the reference on it until the ULP accepts or
1491 * rejects the CR. Also wake up anyone waiting
1492 * in rdma connection migration (see c4iw_accept_cr()).
1493 */
1494 __state_set(&ep->com, CLOSING);
aadc4df3
SW		 1495 ep->com.wr_wait.done = 1;
1496 ep->com.wr_wait.ret = -ECONNRESET;
cfdda9d7 1497 PDBG("waking up ep %p tid %u\n", ep, ep->hwtid);
aadc4df3 1498 wake_up(&ep->com.wr_wait.wait);
cfdda9d7
SW		 1499 break;
1500 case MPA_REP_SENT:
1501 __state_set(&ep->com, CLOSING);
aadc4df3
SW		 1502 ep->com.wr_wait.done = 1;
1503 ep->com.wr_wait.ret = -ECONNRESET;
cfdda9d7 1504 PDBG("waking up ep %p tid %u\n", ep, ep->hwtid);
aadc4df3 1505 wake_up(&ep->com.wr_wait.wait);
cfdda9d7
SW		 1506 break;
1507 case FPDU_MODE:
ca5a2202 1508 start_ep_timer(ep);
cfdda9d7
SW		 1509 __state_set(&ep->com, CLOSING);
1510 closing = 1;
1511 peer_close_upcall(ep);
1512 break;
1513 case ABORTING:
1514 disconnect = 0;
1515 break;
1516 case CLOSING:
1517 __state_set(&ep->com, MORIBUND);
1518 disconnect = 0;
1519 break;
1520 case MORIBUND:
ca5a2202 1521 stop_ep_timer(ep);
cfdda9d7
SW		 1522 if (ep->com.cm_id && ep->com.qp) {
1523 attrs.next_state = C4IW_QP_STATE_IDLE;
1524 c4iw_modify_qp(ep->com.qp->rhp, ep->com.qp,
1525 C4IW_QP_ATTR_NEXT_STATE, &attrs, 1);
1526 }
1527 close_complete_upcall(ep);
1528 __state_set(&ep->com, DEAD);
1529 release = 1;
1530 disconnect = 0;
1531 break;
1532 case DEAD:
1533 disconnect = 0;
1534 break;
1535 default:
1536 BUG_ON(1);
1537 }
2f5b48c3 1538 mutex_unlock(&ep->com.mutex);
cfdda9d7
SW		 1539 if (closing) {
1540 attrs.next_state = C4IW_QP_STATE_CLOSING;
1541 c4iw_modify_qp(ep->com.qp->rhp, ep->com.qp,
1542 C4IW_QP_ATTR_NEXT_STATE, &attrs, 1);
1543 }
cfdda9d7
SW		 1544 if (disconnect)
1545 c4iw_ep_disconnect(ep, 0, GFP_KERNEL);
1546 if (release)
1547 release_ep_resources(ep);
1548 return 0;
1549}
1550
1551/*
1552 * Returns whether an ABORT_REQ_RSS message is a negative advice.
1553 */
1554static int is_neg_adv_abort(unsigned int status)
1555{
1556 return status == CPL_ERR_RTX_NEG_ADVICE ||
1557 status == CPL_ERR_PERSIST_NEG_ADVICE;
1558}
1559
1560static int peer_abort(struct c4iw_dev *dev, struct sk_buff *skb)
1561{
1562 struct cpl_abort_req_rss *req = cplhdr(skb);
1563 struct c4iw_ep *ep;
1564 struct cpl_abort_rpl *rpl;
1565 struct sk_buff *rpl_skb;
1566 struct c4iw_qp_attributes attrs;
1567 int ret;
1568 int release = 0;
cfdda9d7
SW		 1569 struct tid_info *t = dev->rdev.lldi.tids;
1570 unsigned int tid = GET_TID(req);
cfdda9d7
SW		 1571
1572 ep = lookup_tid(t, tid);
1573 if (is_neg_adv_abort(req->status)) {
1574 PDBG("%s neg_adv_abort ep %p tid %u\n", __func__, ep,
1575 ep->hwtid);
1576 return 0;
1577 }
cfdda9d7
SW		 1578 PDBG("%s ep %p tid %u state %u\n", __func__, ep, ep->hwtid,
1579 ep->com.state);
2f5b48c3
SW		 1580
1581 /*
1582 * Wake up any threads in rdma_init() or rdma_fini().
1583 */
1584 ep->com.wr_wait.done = 1;
1585 ep->com.wr_wait.ret = -ECONNRESET;
1586 wake_up(&ep->com.wr_wait.wait);
1587
1588 mutex_lock(&ep->com.mutex);
cfdda9d7
SW		 1589 switch (ep->com.state) {
1590 case CONNECTING:
1591 break;
1592 case MPA_REQ_WAIT:
ca5a2202 1593 stop_ep_timer(ep);
cfdda9d7
SW		 1594 break;
1595 case MPA_REQ_SENT:
ca5a2202 1596 stop_ep_timer(ep);
cfdda9d7
SW		 1597 connect_reply_upcall(ep, -ECONNRESET);
1598 break;
1599 case MPA_REP_SENT:
cfdda9d7
SW		 1600 break;
1601 case MPA_REQ_RCVD:
cfdda9d7
SW		 1602 break;
1603 case MORIBUND:
1604 case CLOSING:
ca5a2202 1605 stop_ep_timer(ep);
cfdda9d7
SW		 1606 /*FALLTHROUGH*/
1607 case FPDU_MODE:
1608 if (ep->com.cm_id && ep->com.qp) {
1609 attrs.next_state = C4IW_QP_STATE_ERROR;
1610 ret = c4iw_modify_qp(ep->com.qp->rhp,
1611 ep->com.qp, C4IW_QP_ATTR_NEXT_STATE,
1612 &attrs, 1);
1613 if (ret)
1614 printk(KERN_ERR MOD
1615 "%s - qp <- error failed!\n",
1616 __func__);
1617 }
1618 peer_abort_upcall(ep);
1619 break;
1620 case ABORTING:
1621 break;
1622 case DEAD:
1623 PDBG("%s PEER_ABORT IN DEAD STATE!!!!\n", __func__);
2f5b48c3 1624 mutex_unlock(&ep->com.mutex);
cfdda9d7
SW		 1625 return 0;
1626 default:
1627 BUG_ON(1);
1628 break;
1629 }
1630 dst_confirm(ep->dst);
1631 if (ep->com.state != ABORTING) {
1632 __state_set(&ep->com, DEAD);
1633 release = 1;
1634 }
2f5b48c3 1635 mutex_unlock(&ep->com.mutex);
cfdda9d7
SW		 1636
1637 rpl_skb = get_skb(skb, sizeof(*rpl), GFP_KERNEL);
1638 if (!rpl_skb) {
1639 printk(KERN_ERR MOD "%s - cannot allocate skb!\n",
1640 __func__);
1641 release = 1;
1642 goto out;
1643 }
1644 set_wr_txq(skb, CPL_PRIORITY_DATA, ep->txq_idx);
1645 rpl = (struct cpl_abort_rpl *) skb_put(rpl_skb, sizeof(*rpl));
1646 INIT_TP_WR(rpl, ep->hwtid);
1647 OPCODE_TID(rpl) = cpu_to_be32(MK_OPCODE_TID(CPL_ABORT_RPL, ep->hwtid));
1648 rpl->cmd = CPL_ABORT_NO_RST;
1649 c4iw_ofld_send(&ep->com.dev->rdev, rpl_skb);
1650out:
cfdda9d7
SW		 1651 if (release)
1652 release_ep_resources(ep);
1653 return 0;
1654}
1655
1656static int close_con_rpl(struct c4iw_dev *dev, struct sk_buff *skb)
1657{
1658 struct c4iw_ep *ep;
1659 struct c4iw_qp_attributes attrs;
1660 struct cpl_close_con_rpl *rpl = cplhdr(skb);
cfdda9d7
SW		 1661 int release = 0;
1662 struct tid_info *t = dev->rdev.lldi.tids;
1663 unsigned int tid = GET_TID(rpl);
cfdda9d7
SW		 1664
1665 ep = lookup_tid(t, tid);
1666
1667 PDBG("%s ep %p tid %u\n", __func__, ep, ep->hwtid);
1668 BUG_ON(!ep);
1669
1670 /* The cm_id may be null if we failed to connect */
2f5b48c3 1671 mutex_lock(&ep->com.mutex);
cfdda9d7
SW		 1672 switch (ep->com.state) {
1673 case CLOSING:
1674 __state_set(&ep->com, MORIBUND);
1675 break;
1676 case MORIBUND:
ca5a2202 1677 stop_ep_timer(ep);
cfdda9d7
SW		 1678 if ((ep->com.cm_id) && (ep->com.qp)) {
1679 attrs.next_state = C4IW_QP_STATE_IDLE;
1680 c4iw_modify_qp(ep->com.qp->rhp,
1681 ep->com.qp,
1682 C4IW_QP_ATTR_NEXT_STATE,
1683 &attrs, 1);
1684 }
1685 close_complete_upcall(ep);
1686 __state_set(&ep->com, DEAD);
1687 release = 1;
1688 break;
1689 case ABORTING:
1690 case DEAD:
1691 break;
1692 default:
1693 BUG_ON(1);
1694 break;
1695 }
2f5b48c3 1696 mutex_unlock(&ep->com.mutex);
cfdda9d7
SW		 1697 if (release)
1698 release_ep_resources(ep);
1699 return 0;
1700}
1701
1702static int terminate(struct c4iw_dev *dev, struct sk_buff *skb)
1703{
0e42c1f4 1704 struct cpl_rdma_terminate *rpl = cplhdr(skb);
cfdda9d7 1705 struct tid_info *t = dev->rdev.lldi.tids;
0e42c1f4
SW		 1706 unsigned int tid = GET_TID(rpl);
1707 struct c4iw_ep *ep;
1708 struct c4iw_qp_attributes attrs;
cfdda9d7
SW		 1709
1710 ep = lookup_tid(t, tid);
0e42c1f4 1711 BUG_ON(!ep);
cfdda9d7 1712
0e42c1f4
SW		 1713 if (ep->com.qp) {
1714 printk(KERN_WARNING MOD "TERM received tid %u qpid %u\n", tid,
1715 ep->com.qp->wq.sq.qid);
1716 attrs.next_state = C4IW_QP_STATE_TERMINATE;
1717 c4iw_modify_qp(ep->com.qp->rhp, ep->com.qp,
1718 C4IW_QP_ATTR_NEXT_STATE, &attrs, 1);
1719 } else
1720 printk(KERN_WARNING MOD "TERM received tid %u no qp\n", tid);
cfdda9d7 1721
cfdda9d7
SW		 1722 return 0;
1723}
1724
1725/*
1726 * Upcall from the adapter indicating data has been transmitted.
1727 * For us its just the single MPA request or reply. We can now free
1728 * the skb holding the mpa message.
1729 */
1730static int fw4_ack(struct c4iw_dev *dev, struct sk_buff *skb)
1731{
1732 struct c4iw_ep *ep;
1733 struct cpl_fw4_ack *hdr = cplhdr(skb);
1734 u8 credits = hdr->credits;
1735 unsigned int tid = GET_TID(hdr);
1736 struct tid_info *t = dev->rdev.lldi.tids;
1737
1738
1739 ep = lookup_tid(t, tid);
1740 PDBG("%s ep %p tid %u credits %u\n", __func__, ep, ep->hwtid, credits);
1741 if (credits == 0) {
aa1ad260
JP		 1742 PDBG("%s 0 credit ack ep %p tid %u state %u\n",
1743 __func__, ep, ep->hwtid, state_read(&ep->com));
cfdda9d7
SW		 1744 return 0;
1745 }
1746
1747 dst_confirm(ep->dst);
1748 if (ep->mpa_skb) {
1749 PDBG("%s last streaming msg ack ep %p tid %u state %u "
1750 "initiator %u freeing skb\n", __func__, ep, ep->hwtid,
1751 state_read(&ep->com), ep->mpa_attr.initiator ? 1 : 0);
1752 kfree_skb(ep->mpa_skb);
1753 ep->mpa_skb = NULL;
1754 }
1755 return 0;
1756}
1757
cfdda9d7
SW		 1758int c4iw_reject_cr(struct iw_cm_id *cm_id, const void *pdata, u8 pdata_len)
1759{
1760 int err;
1761 struct c4iw_ep *ep = to_ep(cm_id);
1762 PDBG("%s ep %p tid %u\n", __func__, ep, ep->hwtid);
1763
1764 if (state_read(&ep->com) == DEAD) {
1765 c4iw_put_ep(&ep->com);
1766 return -ECONNRESET;
1767 }
1768 BUG_ON(state_read(&ep->com) != MPA_REQ_RCVD);
1769 if (mpa_rev == 0)
1770 abort_connection(ep, NULL, GFP_KERNEL);
1771 else {
1772 err = send_mpa_reject(ep, pdata, pdata_len);
1773 err = c4iw_ep_disconnect(ep, 0, GFP_KERNEL);
1774 }
1775 c4iw_put_ep(&ep->com);
1776 return 0;
1777}
1778
1779int c4iw_accept_cr(struct iw_cm_id *cm_id, struct iw_cm_conn_param *conn_param)
1780{
1781 int err;
1782 struct c4iw_qp_attributes attrs;
1783 enum c4iw_qp_attr_mask mask;
1784 struct c4iw_ep *ep = to_ep(cm_id);
1785 struct c4iw_dev *h = to_c4iw_dev(cm_id->device);
1786 struct c4iw_qp *qp = get_qhp(h, conn_param->qpn);
1787
1788 PDBG("%s ep %p tid %u\n", __func__, ep, ep->hwtid);
1789 if (state_read(&ep->com) == DEAD) {
1790 err = -ECONNRESET;
1791 goto err;
1792 }
1793
1794 BUG_ON(state_read(&ep->com) != MPA_REQ_RCVD);
1795 BUG_ON(!qp);
1796
be4c9bad
RD		 1797 if ((conn_param->ord > c4iw_max_read_depth) ||
1798 (conn_param->ird > c4iw_max_read_depth)) {
cfdda9d7
SW		 1799 abort_connection(ep, NULL, GFP_KERNEL);
1800 err = -EINVAL;
1801 goto err;
1802 }
1803
1804 cm_id->add_ref(cm_id);
1805 ep->com.cm_id = cm_id;
1806 ep->com.qp = qp;
1807
1808 ep->ird = conn_param->ird;
1809 ep->ord = conn_param->ord;
1810
1811 if (peer2peer && ep->ird == 0)
1812 ep->ird = 1;
1813
1814 PDBG("%s %d ird %d ord %d\n", __func__, __LINE__, ep->ird, ep->ord);
1815
1816 /* bind QP to EP and move to RTS */
1817 attrs.mpa_attr = ep->mpa_attr;
1818 attrs.max_ird = ep->ird;
1819 attrs.max_ord = ep->ord;
1820 attrs.llp_stream_handle = ep;
1821 attrs.next_state = C4IW_QP_STATE_RTS;
1822
1823 /* bind QP and TID with INIT_WR */
1824 mask = C4IW_QP_ATTR_NEXT_STATE |
1825 C4IW_QP_ATTR_LLP_STREAM_HANDLE |
1826 C4IW_QP_ATTR_MPA_ATTR |
1827 C4IW_QP_ATTR_MAX_IRD |
1828 C4IW_QP_ATTR_MAX_ORD;
1829
1830 err = c4iw_modify_qp(ep->com.qp->rhp,
1831 ep->com.qp, mask, &attrs, 1);
1832 if (err)
1833 goto err1;
1834 err = send_mpa_reply(ep, conn_param->private_data,
1835 conn_param->private_data_len);
1836 if (err)
1837 goto err1;
1838
1839 state_set(&ep->com, FPDU_MODE);
1840 established_upcall(ep);
1841 c4iw_put_ep(&ep->com);
1842 return 0;
1843err1:
1844 ep->com.cm_id = NULL;
1845 ep->com.qp = NULL;
1846 cm_id->rem_ref(cm_id);
1847err:
1848 c4iw_put_ep(&ep->com);
1849 return err;
1850}
1851
1852int c4iw_connect(struct iw_cm_id *cm_id, struct iw_cm_conn_param *conn_param)
1853{
1854 int err = 0;
1855 struct c4iw_dev *dev = to_c4iw_dev(cm_id->device);
1856 struct c4iw_ep *ep;
1857 struct rtable *rt;
1858 struct net_device *pdev;
1859 int step;
1860
be4c9bad
RD		 1861 if ((conn_param->ord > c4iw_max_read_depth) ||
1862 (conn_param->ird > c4iw_max_read_depth)) {
1863 err = -EINVAL;
1864 goto out;
1865 }
cfdda9d7
SW		 1866 ep = alloc_ep(sizeof(*ep), GFP_KERNEL);
1867 if (!ep) {
1868 printk(KERN_ERR MOD "%s - cannot alloc ep.\n", __func__);
1869 err = -ENOMEM;
1870 goto out;
1871 }
1872 init_timer(&ep->timer);
1873 ep->plen = conn_param->private_data_len;
1874 if (ep->plen)
1875 memcpy(ep->mpa_pkt + sizeof(struct mpa_message),
1876 conn_param->private_data, ep->plen);
1877 ep->ird = conn_param->ird;
1878 ep->ord = conn_param->ord;
1879
1880 if (peer2peer && ep->ord == 0)
1881 ep->ord = 1;
1882
1883 cm_id->add_ref(cm_id);
1884 ep->com.dev = dev;
1885 ep->com.cm_id = cm_id;
1886 ep->com.qp = get_qhp(dev, conn_param->qpn);
1887 BUG_ON(!ep->com.qp);
1888 PDBG("%s qpn 0x%x qp %p cm_id %p\n", __func__, conn_param->qpn,
1889 ep->com.qp, cm_id);
1890
1891 /*
1892 * Allocate an active TID to initiate a TCP connection.
1893 */
1894 ep->atid = cxgb4_alloc_atid(dev->rdev.lldi.tids, ep);
1895 if (ep->atid == -1) {
1896 printk(KERN_ERR MOD "%s - cannot alloc atid.\n", __func__);
1897 err = -ENOMEM;
1898 goto fail2;
1899 }
1900
1901 PDBG("%s saddr 0x%x sport 0x%x raddr 0x%x rport 0x%x\n", __func__,
1902 ntohl(cm_id->local_addr.sin_addr.s_addr),
1903 ntohs(cm_id->local_addr.sin_port),
1904 ntohl(cm_id->remote_addr.sin_addr.s_addr),
1905 ntohs(cm_id->remote_addr.sin_port));
1906
1907 /* find a route */
1908 rt = find_route(dev,
1909 cm_id->local_addr.sin_addr.s_addr,
1910 cm_id->remote_addr.sin_addr.s_addr,
1911 cm_id->local_addr.sin_port,
1912 cm_id->remote_addr.sin_port, 0);
1913 if (!rt) {
1914 printk(KERN_ERR MOD "%s - cannot find route.\n", __func__);
1915 err = -EHOSTUNREACH;
1916 goto fail3;
1917 }
d8d1f30b 1918 ep->dst = &rt->dst;
cfdda9d7
SW		 1919
1920 /* get a l2t entry */
1921 if (ep->dst->neighbour->dev->flags & IFF_LOOPBACK) {
1922 PDBG("%s LOOPBACK\n", __func__);
1923 pdev = ip_dev_find(&init_net,
1924 cm_id->remote_addr.sin_addr.s_addr);
1925 ep->l2t = cxgb4_l2t_get(ep->com.dev->rdev.lldi.l2t,
1926 ep->dst->neighbour,
1927 pdev, 0);
1928 ep->mtu = pdev->mtu;
1929 ep->tx_chan = cxgb4_port_chan(pdev);
2c5934bf 1930 ep->smac_idx = (cxgb4_port_viid(pdev) & 0x7F) << 1;
cfdda9d7
SW		 1931 step = ep->com.dev->rdev.lldi.ntxq /
1932 ep->com.dev->rdev.lldi.nchan;
1933 ep->txq_idx = cxgb4_port_idx(pdev) * step;
1934 step = ep->com.dev->rdev.lldi.nrxq /
1935 ep->com.dev->rdev.lldi.nchan;
d4f1a5c6 1936 ep->ctrlq_idx = cxgb4_port_idx(pdev);
cfdda9d7
SW		 1937 ep->rss_qid = ep->com.dev->rdev.lldi.rxq_ids[
1938 cxgb4_port_idx(pdev) * step];
1939 dev_put(pdev);
1940 } else {
1941 ep->l2t = cxgb4_l2t_get(ep->com.dev->rdev.lldi.l2t,
1942 ep->dst->neighbour,
1943 ep->dst->neighbour->dev, 0);
1944 ep->mtu = dst_mtu(ep->dst);
1945 ep->tx_chan = cxgb4_port_chan(ep->dst->neighbour->dev);
2c5934bf
SW		 1946 ep->smac_idx = (cxgb4_port_viid(ep->dst->neighbour->dev) &
1947 0x7F) << 1;
cfdda9d7
SW		 1948 step = ep->com.dev->rdev.lldi.ntxq /
1949 ep->com.dev->rdev.lldi.nchan;
1950 ep->txq_idx = cxgb4_port_idx(ep->dst->neighbour->dev) * step;
d4f1a5c6 1951 ep->ctrlq_idx = cxgb4_port_idx(ep->dst->neighbour->dev);
cfdda9d7
SW		 1952 step = ep->com.dev->rdev.lldi.nrxq /
1953 ep->com.dev->rdev.lldi.nchan;
1954 ep->rss_qid = ep->com.dev->rdev.lldi.rxq_ids[
1955 cxgb4_port_idx(ep->dst->neighbour->dev) * step];
1956 }
1957 if (!ep->l2t) {
1958 printk(KERN_ERR MOD "%s - cannot alloc l2e.\n", __func__);
1959 err = -ENOMEM;
1960 goto fail4;
1961 }
1962
1963 PDBG("%s txq_idx %u tx_chan %u smac_idx %u rss_qid %u l2t_idx %u\n",
1964 __func__, ep->txq_idx, ep->tx_chan, ep->smac_idx, ep->rss_qid,
1965 ep->l2t->idx);
1966
1967 state_set(&ep->com, CONNECTING);
1968 ep->tos = 0;
1969 ep->com.local_addr = cm_id->local_addr;
1970 ep->com.remote_addr = cm_id->remote_addr;
1971
1972 /* send connect request to rnic */
1973 err = send_connect(ep);
1974 if (!err)
1975 goto out;
1976
1977 cxgb4_l2t_release(ep->l2t);
1978fail4:
1979 dst_release(ep->dst);
1980fail3:
1981 cxgb4_free_atid(ep->com.dev->rdev.lldi.tids, ep->atid);
1982fail2:
1983 cm_id->rem_ref(cm_id);
1984 c4iw_put_ep(&ep->com);
1985out:
1986 return err;
1987}
1988
1989int c4iw_create_listen(struct iw_cm_id *cm_id, int backlog)
1990{
1991 int err = 0;
1992 struct c4iw_dev *dev = to_c4iw_dev(cm_id->device);
1993 struct c4iw_listen_ep *ep;
1994
1995
1996 might_sleep();
1997
1998 ep = alloc_ep(sizeof(*ep), GFP_KERNEL);
1999 if (!ep) {
2000 printk(KERN_ERR MOD "%s - cannot alloc ep.\n", __func__);
2001 err = -ENOMEM;
2002 goto fail1;
2003 }
2004 PDBG("%s ep %p\n", __func__, ep);
2005 cm_id->add_ref(cm_id);
2006 ep->com.cm_id = cm_id;
2007 ep->com.dev = dev;
2008 ep->backlog = backlog;
2009 ep->com.local_addr = cm_id->local_addr;
2010
2011 /*
2012 * Allocate a server TID.
2013 */
2014 ep->stid = cxgb4_alloc_stid(dev->rdev.lldi.tids, PF_INET, ep);
2015 if (ep->stid == -1) {
be4c9bad 2016 printk(KERN_ERR MOD "%s - cannot alloc stid.\n", __func__);
cfdda9d7
SW		 2017 err = -ENOMEM;
2018 goto fail2;
2019 }
2020
2021 state_set(&ep->com, LISTEN);
aadc4df3 2022 c4iw_init_wr_wait(&ep->com.wr_wait);
cfdda9d7
SW		 2023 err = cxgb4_create_server(ep->com.dev->rdev.lldi.ports[0], ep->stid,
2024 ep->com.local_addr.sin_addr.s_addr,
2025 ep->com.local_addr.sin_port,
2026 ep->com.dev->rdev.lldi.rxq_ids[0]);
2027 if (err)
2028 goto fail3;
2029
2030 /* wait for pass_open_rpl */
aadc4df3
SW		 2031 err = c4iw_wait_for_reply(&ep->com.dev->rdev, &ep->com.wr_wait, 0, 0,
2032 __func__);
cfdda9d7
SW		 2033 if (!err) {
2034 cm_id->provider_data = ep;
2035 goto out;
2036 }
2037fail3:
2038 cxgb4_free_stid(ep->com.dev->rdev.lldi.tids, ep->stid, PF_INET);
2039fail2:
2040 cm_id->rem_ref(cm_id);
2041 c4iw_put_ep(&ep->com);
2042fail1:
2043out:
2044 return err;
2045}
2046
2047int c4iw_destroy_listen(struct iw_cm_id *cm_id)
2048{
2049 int err;
2050 struct c4iw_listen_ep *ep = to_listen_ep(cm_id);
2051
2052 PDBG("%s ep %p\n", __func__, ep);
2053
2054 might_sleep();
2055 state_set(&ep->com, DEAD);
aadc4df3 2056 c4iw_init_wr_wait(&ep->com.wr_wait);
cfdda9d7
SW		 2057 err = listen_stop(ep);
2058 if (err)
2059 goto done;
aadc4df3
SW		 2060 err = c4iw_wait_for_reply(&ep->com.dev->rdev, &ep->com.wr_wait, 0, 0,
2061 __func__);
cfdda9d7
SW		 2062 cxgb4_free_stid(ep->com.dev->rdev.lldi.tids, ep->stid, PF_INET);
2063done:
cfdda9d7
SW		 2064 cm_id->rem_ref(cm_id);
2065 c4iw_put_ep(&ep->com);
2066 return err;
2067}
2068
2069int c4iw_ep_disconnect(struct c4iw_ep *ep, int abrupt, gfp_t gfp)
2070{
2071 int ret = 0;
cfdda9d7
SW		 2072 int close = 0;
2073 int fatal = 0;
2074 struct c4iw_rdev *rdev;
cfdda9d7 2075
2f5b48c3 2076 mutex_lock(&ep->com.mutex);
cfdda9d7
SW		 2077
2078 PDBG("%s ep %p state %s, abrupt %d\n", __func__, ep,
2079 states[ep->com.state], abrupt);
2080
2081 rdev = &ep->com.dev->rdev;
2082 if (c4iw_fatal_error(rdev)) {
2083 fatal = 1;
2084 close_complete_upcall(ep);
2085 ep->com.state = DEAD;
2086 }
2087 switch (ep->com.state) {
2088 case MPA_REQ_WAIT:
2089 case MPA_REQ_SENT:
2090 case MPA_REQ_RCVD:
2091 case MPA_REP_SENT:
2092 case FPDU_MODE:
2093 close = 1;
2094 if (abrupt)
2095 ep->com.state = ABORTING;
2096 else {
2097 ep->com.state = CLOSING;
ca5a2202 2098 start_ep_timer(ep);
cfdda9d7
SW		 2099 }
2100 set_bit(CLOSE_SENT, &ep->com.flags);
2101 break;
2102 case CLOSING:
2103 if (!test_and_set_bit(CLOSE_SENT, &ep->com.flags)) {
2104 close = 1;
2105 if (abrupt) {
ca5a2202 2106 stop_ep_timer(ep);
cfdda9d7
SW		 2107 ep->com.state = ABORTING;
2108 } else
2109 ep->com.state = MORIBUND;
2110 }
2111 break;
2112 case MORIBUND:
2113 case ABORTING:
2114 case DEAD:
2115 PDBG("%s ignoring disconnect ep %p state %u\n",
2116 __func__, ep, ep->com.state);
2117 break;
2118 default:
2119 BUG();
2120 break;
2121 }
2122
2f5b48c3 2123 mutex_unlock(&ep->com.mutex);
cfdda9d7
SW		 2124 if (close) {
2125 if (abrupt)
2126 ret = abort_connection(ep, NULL, gfp);
2127 else
2128 ret = send_halfclose(ep, gfp);
2129 if (ret)
2130 fatal = 1;
2131 }
2132 if (fatal)
2133 release_ep_resources(ep);
2134 return ret;
2135}
2136
2f5b48c3
SW		 2137static int async_event(struct c4iw_dev *dev, struct sk_buff *skb)
2138{
2139 struct cpl_fw6_msg *rpl = cplhdr(skb);
2140 c4iw_ev_dispatch(dev, (struct t4_cqe *)&rpl->data[0]);
2141 return 0;
2142}
2143
be4c9bad
RD		 2144/*
2145 * These are the real handlers that are called from a
2146 * work queue.
2147 */
2148static c4iw_handler_func work_handlers[NUM_CPL_CMDS] = {
2149 [CPL_ACT_ESTABLISH] = act_establish,
2150 [CPL_ACT_OPEN_RPL] = act_open_rpl,
2151 [CPL_RX_DATA] = rx_data,
2152 [CPL_ABORT_RPL_RSS] = abort_rpl,
2153 [CPL_ABORT_RPL] = abort_rpl,
2154 [CPL_PASS_OPEN_RPL] = pass_open_rpl,
2155 [CPL_CLOSE_LISTSRV_RPL] = close_listsrv_rpl,
2156 [CPL_PASS_ACCEPT_REQ] = pass_accept_req,
2157 [CPL_PASS_ESTABLISH] = pass_establish,
2158 [CPL_PEER_CLOSE] = peer_close,
2159 [CPL_ABORT_REQ_RSS] = peer_abort,
2160 [CPL_CLOSE_CON_RPL] = close_con_rpl,
2161 [CPL_RDMA_TERMINATE] = terminate,
2f5b48c3
SW		 2162 [CPL_FW4_ACK] = fw4_ack,
2163 [CPL_FW6_MSG] = async_event
be4c9bad
RD		 2164};
2165
2166static void process_timeout(struct c4iw_ep *ep)
2167{
2168 struct c4iw_qp_attributes attrs;
2169 int abort = 1;
2170
2f5b48c3 2171 mutex_lock(&ep->com.mutex);
be4c9bad
RD		 2172 PDBG("%s ep %p tid %u state %d\n", __func__, ep, ep->hwtid,
2173 ep->com.state);
2174 switch (ep->com.state) {
2175 case MPA_REQ_SENT:
2176 __state_set(&ep->com, ABORTING);
2177 connect_reply_upcall(ep, -ETIMEDOUT);
2178 break;
2179 case MPA_REQ_WAIT:
2180 __state_set(&ep->com, ABORTING);
2181 break;
2182 case CLOSING:
2183 case MORIBUND:
2184 if (ep->com.cm_id && ep->com.qp) {
2185 attrs.next_state = C4IW_QP_STATE_ERROR;
2186 c4iw_modify_qp(ep->com.qp->rhp,
2187 ep->com.qp, C4IW_QP_ATTR_NEXT_STATE,
2188 &attrs, 1);
2189 }
2190 __state_set(&ep->com, ABORTING);
2191 break;
2192 default:
2193 printk(KERN_ERR "%s unexpected state ep %p tid %u state %u\n",
2194 __func__, ep, ep->hwtid, ep->com.state);
2195 WARN_ON(1);
2196 abort = 0;
2197 }
2f5b48c3 2198 mutex_unlock(&ep->com.mutex);
be4c9bad
RD		 2199 if (abort)
2200 abort_connection(ep, NULL, GFP_KERNEL);
2201 c4iw_put_ep(&ep->com);
2202}
2203
2204static void process_timedout_eps(void)
2205{
2206 struct c4iw_ep *ep;
2207
2208 spin_lock_irq(&timeout_lock);
2209 while (!list_empty(&timeout_list)) {
2210 struct list_head *tmp;
2211
2212 tmp = timeout_list.next;
2213 list_del(tmp);
2214 spin_unlock_irq(&timeout_lock);
2215 ep = list_entry(tmp, struct c4iw_ep, entry);
2216 process_timeout(ep);
2217 spin_lock_irq(&timeout_lock);
2218 }
2219 spin_unlock_irq(&timeout_lock);
2220}
2221
2222static void process_work(struct work_struct *work)
2223{
2224 struct sk_buff *skb = NULL;
2225 struct c4iw_dev *dev;
c1d7356c 2226 struct cpl_act_establish *rpl;
be4c9bad
RD		 2227 unsigned int opcode;
2228 int ret;
2229
2230 while ((skb = skb_dequeue(&rxq))) {
2231 rpl = cplhdr(skb);
2232 dev = *((struct c4iw_dev **) (skb->cb + sizeof(void *)));
2233 opcode = rpl->ot.opcode;
2234
2235 BUG_ON(!work_handlers[opcode]);
2236 ret = work_handlers[opcode](dev, skb);
2237 if (!ret)
2238 kfree_skb(skb);
2239 }
2240 process_timedout_eps();
2241}
2242
2243static DECLARE_WORK(skb_work, process_work);
2244
2245static void ep_timeout(unsigned long arg)
2246{
2247 struct c4iw_ep *ep = (struct c4iw_ep *)arg;
2248
2249 spin_lock(&timeout_lock);
2250 list_add_tail(&ep->entry, &timeout_list);
2251 spin_unlock(&timeout_lock);
2252 queue_work(workq, &skb_work);
2253}
2254
cfdda9d7
SW		 2255/*
2256 * All the CM events are handled on a work queue to have a safe context.
2257 */
2258static int sched(struct c4iw_dev *dev, struct sk_buff *skb)
2259{
2260
2261 /*
2262 * Save dev in the skb->cb area.
2263 */
2264 *((struct c4iw_dev **) (skb->cb + sizeof(void *))) = dev;
2265
2266 /*
2267 * Queue the skb and schedule the worker thread.
2268 */
2269 skb_queue_tail(&rxq, skb);
2270 queue_work(workq, &skb_work);
2271 return 0;
2272}
2273
2274static int set_tcb_rpl(struct c4iw_dev *dev, struct sk_buff *skb)
2275{
2276 struct cpl_set_tcb_rpl *rpl = cplhdr(skb);
2277
2278 if (rpl->status != CPL_ERR_NONE) {
2279 printk(KERN_ERR MOD "Unexpected SET_TCB_RPL status %u "
2280 "for tid %u\n", rpl->status, GET_TID(rpl));
2281 }
2f5b48c3 2282 kfree_skb(skb);
cfdda9d7
SW		 2283 return 0;
2284}
2285
be4c9bad
RD		 2286static int fw6_msg(struct c4iw_dev *dev, struct sk_buff *skb)
2287{
2288 struct cpl_fw6_msg *rpl = cplhdr(skb);
2289 struct c4iw_wr_wait *wr_waitp;
2290 int ret;
2291
2292 PDBG("%s type %u\n", __func__, rpl->type);
2293
2294 switch (rpl->type) {
2295 case 1:
2296 ret = (int)((be64_to_cpu(rpl->data[0]) >> 8) & 0xff);
c8e081a1 2297 wr_waitp = (struct c4iw_wr_wait *)(__force unsigned long) rpl->data[1];
be4c9bad
RD		 2298 PDBG("%s wr_waitp %p ret %u\n", __func__, wr_waitp, ret);
2299 if (wr_waitp) {
2f5b48c3
SW		 2300 if (ret)
2301 wr_waitp->ret = -ret;
2302 else
2303 wr_waitp->ret = 0;
be4c9bad
RD		 2304 wr_waitp->done = 1;
2305 wake_up(&wr_waitp->wait);
2306 }
2f5b48c3 2307 kfree_skb(skb);
be4c9bad
RD		 2308 break;
2309 case 2:
2f5b48c3 2310 sched(dev, skb);
be4c9bad
RD		 2311 break;
2312 default:
2313 printk(KERN_ERR MOD "%s unexpected fw6 msg type %u\n", __func__,
2314 rpl->type);
2f5b48c3 2315 kfree_skb(skb);
be4c9bad
RD		 2316 break;
2317 }
2318 return 0;
2319}
2320
2321/*
2322 * Most upcalls from the T4 Core go to sched() to
2323 * schedule the processing on a work queue.
2324 */
2325c4iw_handler_func c4iw_handlers[NUM_CPL_CMDS] = {
2326 [CPL_ACT_ESTABLISH] = sched,
2327 [CPL_ACT_OPEN_RPL] = sched,
2328 [CPL_RX_DATA] = sched,
2329 [CPL_ABORT_RPL_RSS] = sched,
2330 [CPL_ABORT_RPL] = sched,
2331 [CPL_PASS_OPEN_RPL] = sched,
2332 [CPL_CLOSE_LISTSRV_RPL] = sched,
2333 [CPL_PASS_ACCEPT_REQ] = sched,
2334 [CPL_PASS_ESTABLISH] = sched,
2335 [CPL_PEER_CLOSE] = sched,
2336 [CPL_CLOSE_CON_RPL] = sched,
2337 [CPL_ABORT_REQ_RSS] = sched,
2338 [CPL_RDMA_TERMINATE] = sched,
2339 [CPL_FW4_ACK] = sched,
2340 [CPL_SET_TCB_RPL] = set_tcb_rpl,
2341 [CPL_FW6_MSG] = fw6_msg
2342};
2343
cfdda9d7
SW		 2344int __init c4iw_cm_init(void)
2345{
be4c9bad 2346 spin_lock_init(&timeout_lock);
cfdda9d7
SW		 2347 skb_queue_head_init(&rxq);
2348
2349 workq = create_singlethread_workqueue("iw_cxgb4");
2350 if (!workq)
2351 return -ENOMEM;
2352
cfdda9d7
SW		 2353 return 0;
2354}
2355
2356void __exit c4iw_cm_term(void)
2357{
be4c9bad 2358 WARN_ON(!list_empty(&timeout_list));
cfdda9d7
SW		 2359 flush_workqueue(workq);
2360 destroy_workqueue(workq);
2361}
Linux 6.x block layer and io_uring tree(s)