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Merge branch 'iommu/fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/joro...
[GitHub/mt8127/android_kernel_alcatel_ttab.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
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, "
d2fe99e8
KS		 106 "1 is RFC0544 spec compliant, 2 is IETF MPA Peer Connect Draft"
107 " compliant (default=1)");
cfdda9d7
SW		 108
109static int markers_enabled;
110module_param(markers_enabled, int, 0644);
111MODULE_PARM_DESC(markers_enabled, "Enable MPA MARKERS (default(0)=disabled)");
112
113static int crc_enabled = 1;
114module_param(crc_enabled, int, 0644);
115MODULE_PARM_DESC(crc_enabled, "Enable MPA CRC (default(1)=enabled)");
116
117static int rcv_win = 256 * 1024;
118module_param(rcv_win, int, 0644);
119MODULE_PARM_DESC(rcv_win, "TCP receive window in bytes (default=256KB)");
120
98ae68b7 121static int snd_win = 128 * 1024;
cfdda9d7 122module_param(snd_win, int, 0644);
98ae68b7 123MODULE_PARM_DESC(snd_win, "TCP send window in bytes (default=128KB)");
cfdda9d7 124
cfdda9d7 125static struct workqueue_struct *workq;
cfdda9d7
SW		 126
127static struct sk_buff_head rxq;
cfdda9d7
SW		 128
129static struct sk_buff *get_skb(struct sk_buff *skb, int len, gfp_t gfp);
130static void ep_timeout(unsigned long arg);
131static void connect_reply_upcall(struct c4iw_ep *ep, int status);
132
be4c9bad
RD		 133static LIST_HEAD(timeout_list);
134static spinlock_t timeout_lock;
135
cfdda9d7
SW		 136static void start_ep_timer(struct c4iw_ep *ep)
137{
138 PDBG("%s ep %p\n", __func__, ep);
139 if (timer_pending(&ep->timer)) {
140 PDBG("%s stopped / restarted timer ep %p\n", __func__, ep);
141 del_timer_sync(&ep->timer);
142 } else
143 c4iw_get_ep(&ep->com);
144 ep->timer.expires = jiffies + ep_timeout_secs * HZ;
145 ep->timer.data = (unsigned long)ep;
146 ep->timer.function = ep_timeout;
147 add_timer(&ep->timer);
148}
149
150static void stop_ep_timer(struct c4iw_ep *ep)
151{
152 PDBG("%s ep %p\n", __func__, ep);
153 if (!timer_pending(&ep->timer)) {
154 printk(KERN_ERR "%s timer stopped when its not running! "
155 "ep %p state %u\n", __func__, ep, ep->com.state);
156 WARN_ON(1);
157 return;
158 }
159 del_timer_sync(&ep->timer);
160 c4iw_put_ep(&ep->com);
161}
162
163static int c4iw_l2t_send(struct c4iw_rdev *rdev, struct sk_buff *skb,
164 struct l2t_entry *l2e)
165{
166 int error = 0;
167
168 if (c4iw_fatal_error(rdev)) {
169 kfree_skb(skb);
170 PDBG("%s - device in error state - dropping\n", __func__);
171 return -EIO;
172 }
173 error = cxgb4_l2t_send(rdev->lldi.ports[0], skb, l2e);
174 if (error < 0)
175 kfree_skb(skb);
74594861 176 return error < 0 ? error : 0;
cfdda9d7
SW		 177}
178
179int c4iw_ofld_send(struct c4iw_rdev *rdev, struct sk_buff *skb)
180{
181 int error = 0;
182
183 if (c4iw_fatal_error(rdev)) {
184 kfree_skb(skb);
185 PDBG("%s - device in error state - dropping\n", __func__);
186 return -EIO;
187 }
188 error = cxgb4_ofld_send(rdev->lldi.ports[0], skb);
189 if (error < 0)
190 kfree_skb(skb);
74594861 191 return error < 0 ? error : 0;
cfdda9d7
SW		 192}
193
194static void release_tid(struct c4iw_rdev *rdev, u32 hwtid, struct sk_buff *skb)
195{
196 struct cpl_tid_release *req;
197
198 skb = get_skb(skb, sizeof *req, GFP_KERNEL);
199 if (!skb)
200 return;
201 req = (struct cpl_tid_release *) skb_put(skb, sizeof(*req));
202 INIT_TP_WR(req, hwtid);
203 OPCODE_TID(req) = cpu_to_be32(MK_OPCODE_TID(CPL_TID_RELEASE, hwtid));
204 set_wr_txq(skb, CPL_PRIORITY_SETUP, 0);
205 c4iw_ofld_send(rdev, skb);
206 return;
207}
208
209static void set_emss(struct c4iw_ep *ep, u16 opt)
210{
211 ep->emss = ep->com.dev->rdev.lldi.mtus[GET_TCPOPT_MSS(opt)] - 40;
212 ep->mss = ep->emss;
213 if (GET_TCPOPT_TSTAMP(opt))
214 ep->emss -= 12;
215 if (ep->emss < 128)
216 ep->emss = 128;
217 PDBG("%s mss_idx %u mss %u emss=%u\n", __func__, GET_TCPOPT_MSS(opt),
218 ep->mss, ep->emss);
219}
220
221static enum c4iw_ep_state state_read(struct c4iw_ep_common *epc)
222{
cfdda9d7
SW		 223 enum c4iw_ep_state state;
224
2f5b48c3 225 mutex_lock(&epc->mutex);
cfdda9d7 226 state = epc->state;
2f5b48c3 227 mutex_unlock(&epc->mutex);
cfdda9d7
SW		 228 return state;
229}
230
231static void __state_set(struct c4iw_ep_common *epc, enum c4iw_ep_state new)
232{
233 epc->state = new;
234}
235
236static void state_set(struct c4iw_ep_common *epc, enum c4iw_ep_state new)
237{
2f5b48c3 238 mutex_lock(&epc->mutex);
cfdda9d7
SW		 239 PDBG("%s - %s -> %s\n", __func__, states[epc->state], states[new]);
240 __state_set(epc, new);
2f5b48c3 241 mutex_unlock(&epc->mutex);
cfdda9d7
SW		 242 return;
243}
244
245static void *alloc_ep(int size, gfp_t gfp)
246{
247 struct c4iw_ep_common *epc;
248
249 epc = kzalloc(size, gfp);
250 if (epc) {
251 kref_init(&epc->kref);
2f5b48c3 252 mutex_init(&epc->mutex);
aadc4df3 253 c4iw_init_wr_wait(&epc->wr_wait);
cfdda9d7
SW		 254 }
255 PDBG("%s alloc ep %p\n", __func__, epc);
256 return epc;
257}
258
259void _c4iw_free_ep(struct kref *kref)
260{
261 struct c4iw_ep *ep;
262
263 ep = container_of(kref, struct c4iw_ep, com.kref);
264 PDBG("%s ep %p state %s\n", __func__, ep, states[state_read(&ep->com)]);
265 if (test_bit(RELEASE_RESOURCES, &ep->com.flags)) {
266 cxgb4_remove_tid(ep->com.dev->rdev.lldi.tids, 0, ep->hwtid);
267 dst_release(ep->dst);
268 cxgb4_l2t_release(ep->l2t);
269 }
270 kfree(ep);
271}
272
273static void release_ep_resources(struct c4iw_ep *ep)
274{
275 set_bit(RELEASE_RESOURCES, &ep->com.flags);
276 c4iw_put_ep(&ep->com);
277}
278
cfdda9d7
SW		 279static int status2errno(int status)
280{
281 switch (status) {
282 case CPL_ERR_NONE:
283 return 0;
284 case CPL_ERR_CONN_RESET:
285 return -ECONNRESET;
286 case CPL_ERR_ARP_MISS:
287 return -EHOSTUNREACH;
288 case CPL_ERR_CONN_TIMEDOUT:
289 return -ETIMEDOUT;
290 case CPL_ERR_TCAM_FULL:
291 return -ENOMEM;
292 case CPL_ERR_CONN_EXIST:
293 return -EADDRINUSE;
294 default:
295 return -EIO;
296 }
297}
298
299/*
300 * Try and reuse skbs already allocated...
301 */
302static struct sk_buff *get_skb(struct sk_buff *skb, int len, gfp_t gfp)
303{
304 if (skb && !skb_is_nonlinear(skb) && !skb_cloned(skb)) {
305 skb_trim(skb, 0);
306 skb_get(skb);
307 skb_reset_transport_header(skb);
308 } else {
309 skb = alloc_skb(len, gfp);
310 }
311 return skb;
312}
313
314static struct rtable *find_route(struct c4iw_dev *dev, __be32 local_ip,
315 __be32 peer_ip, __be16 local_port,
316 __be16 peer_port, u8 tos)
317{
318 struct rtable *rt;
31e4543d 319 struct flowi4 fl4;
78fbfd8a 320
31e4543d 321 rt = ip_route_output_ports(&init_net, &fl4, NULL, peer_ip, local_ip,
78fbfd8a
DM		 322 peer_port, local_port, IPPROTO_TCP,
323 tos, 0);
b23dd4fe 324 if (IS_ERR(rt))
cfdda9d7
SW		 325 return NULL;
326 return rt;
327}
328
329static void arp_failure_discard(void *handle, struct sk_buff *skb)
330{
331 PDBG("%s c4iw_dev %p\n", __func__, handle);
332 kfree_skb(skb);
333}
334
335/*
336 * Handle an ARP failure for an active open.
337 */
338static void act_open_req_arp_failure(void *handle, struct sk_buff *skb)
339{
340 printk(KERN_ERR MOD "ARP failure duing connect\n");
341 kfree_skb(skb);
342}
343
344/*
345 * Handle an ARP failure for a CPL_ABORT_REQ. Change it into a no RST variant
346 * and send it along.
347 */
348static void abort_arp_failure(void *handle, struct sk_buff *skb)
349{
350 struct c4iw_rdev *rdev = handle;
351 struct cpl_abort_req *req = cplhdr(skb);
352
353 PDBG("%s rdev %p\n", __func__, rdev);
354 req->cmd = CPL_ABORT_NO_RST;
355 c4iw_ofld_send(rdev, skb);
356}
357
358static void send_flowc(struct c4iw_ep *ep, struct sk_buff *skb)
359{
360 unsigned int flowclen = 80;
361 struct fw_flowc_wr *flowc;
362 int i;
363
364 skb = get_skb(skb, flowclen, GFP_KERNEL);
365 flowc = (struct fw_flowc_wr *)__skb_put(skb, flowclen);
366
367 flowc->op_to_nparams = cpu_to_be32(FW_WR_OP(FW_FLOWC_WR) |
368 FW_FLOWC_WR_NPARAMS(8));
369 flowc->flowid_len16 = cpu_to_be32(FW_WR_LEN16(DIV_ROUND_UP(flowclen,
370 16)) | FW_WR_FLOWID(ep->hwtid));
371
372 flowc->mnemval[0].mnemonic = FW_FLOWC_MNEM_PFNVFN;
94788657 373 flowc->mnemval[0].val = cpu_to_be32(PCI_FUNC(ep->com.dev->rdev.lldi.pdev->devfn) << 8);
cfdda9d7
SW		 374 flowc->mnemval[1].mnemonic = FW_FLOWC_MNEM_CH;
375 flowc->mnemval[1].val = cpu_to_be32(ep->tx_chan);
376 flowc->mnemval[2].mnemonic = FW_FLOWC_MNEM_PORT;
377 flowc->mnemval[2].val = cpu_to_be32(ep->tx_chan);
378 flowc->mnemval[3].mnemonic = FW_FLOWC_MNEM_IQID;
379 flowc->mnemval[3].val = cpu_to_be32(ep->rss_qid);
380 flowc->mnemval[4].mnemonic = FW_FLOWC_MNEM_SNDNXT;
381 flowc->mnemval[4].val = cpu_to_be32(ep->snd_seq);
382 flowc->mnemval[5].mnemonic = FW_FLOWC_MNEM_RCVNXT;
383 flowc->mnemval[5].val = cpu_to_be32(ep->rcv_seq);
384 flowc->mnemval[6].mnemonic = FW_FLOWC_MNEM_SNDBUF;
385 flowc->mnemval[6].val = cpu_to_be32(snd_win);
386 flowc->mnemval[7].mnemonic = FW_FLOWC_MNEM_MSS;
387 flowc->mnemval[7].val = cpu_to_be32(ep->emss);
388 /* Pad WR to 16 byte boundary */
389 flowc->mnemval[8].mnemonic = 0;
390 flowc->mnemval[8].val = 0;
391 for (i = 0; i < 9; i++) {
392 flowc->mnemval[i].r4[0] = 0;
393 flowc->mnemval[i].r4[1] = 0;
394 flowc->mnemval[i].r4[2] = 0;
395 }
396
397 set_wr_txq(skb, CPL_PRIORITY_DATA, ep->txq_idx);
398 c4iw_ofld_send(&ep->com.dev->rdev, skb);
399}
400
401static int send_halfclose(struct c4iw_ep *ep, gfp_t gfp)
402{
403 struct cpl_close_con_req *req;
404 struct sk_buff *skb;
405 int wrlen = roundup(sizeof *req, 16);
406
407 PDBG("%s ep %p tid %u\n", __func__, ep, ep->hwtid);
408 skb = get_skb(NULL, wrlen, gfp);
409 if (!skb) {
410 printk(KERN_ERR MOD "%s - failed to alloc skb\n", __func__);
411 return -ENOMEM;
412 }
413 set_wr_txq(skb, CPL_PRIORITY_DATA, ep->txq_idx);
414 t4_set_arp_err_handler(skb, NULL, arp_failure_discard);
415 req = (struct cpl_close_con_req *) skb_put(skb, wrlen);
416 memset(req, 0, wrlen);
417 INIT_TP_WR(req, ep->hwtid);
418 OPCODE_TID(req) = cpu_to_be32(MK_OPCODE_TID(CPL_CLOSE_CON_REQ,
419 ep->hwtid));
420 return c4iw_l2t_send(&ep->com.dev->rdev, skb, ep->l2t);
421}
422
423static int send_abort(struct c4iw_ep *ep, struct sk_buff *skb, gfp_t gfp)
424{
425 struct cpl_abort_req *req;
426 int wrlen = roundup(sizeof *req, 16);
427
428 PDBG("%s ep %p tid %u\n", __func__, ep, ep->hwtid);
429 skb = get_skb(skb, wrlen, gfp);
430 if (!skb) {
431 printk(KERN_ERR MOD "%s - failed to alloc skb.\n",
432 __func__);
433 return -ENOMEM;
434 }
435 set_wr_txq(skb, CPL_PRIORITY_DATA, ep->txq_idx);
436 t4_set_arp_err_handler(skb, &ep->com.dev->rdev, abort_arp_failure);
437 req = (struct cpl_abort_req *) skb_put(skb, wrlen);
438 memset(req, 0, wrlen);
439 INIT_TP_WR(req, ep->hwtid);
440 OPCODE_TID(req) = cpu_to_be32(MK_OPCODE_TID(CPL_ABORT_REQ, ep->hwtid));
441 req->cmd = CPL_ABORT_SEND_RST;
442 return c4iw_l2t_send(&ep->com.dev->rdev, skb, ep->l2t);
443}
444
445static int send_connect(struct c4iw_ep *ep)
446{
447 struct cpl_act_open_req *req;
448 struct sk_buff *skb;
449 u64 opt0;
450 u32 opt2;
451 unsigned int mtu_idx;
452 int wscale;
453 int wrlen = roundup(sizeof *req, 16);
454
455 PDBG("%s ep %p atid %u\n", __func__, ep, ep->atid);
456
457 skb = get_skb(NULL, wrlen, GFP_KERNEL);
458 if (!skb) {
459 printk(KERN_ERR MOD "%s - failed to alloc skb.\n",
460 __func__);
461 return -ENOMEM;
462 }
d4f1a5c6 463 set_wr_txq(skb, CPL_PRIORITY_SETUP, ep->ctrlq_idx);
cfdda9d7
SW		 464
465 cxgb4_best_mtu(ep->com.dev->rdev.lldi.mtus, ep->mtu, &mtu_idx);
466 wscale = compute_wscale(rcv_win);
467 opt0 = KEEP_ALIVE(1) |
ba6d3925 468 DELACK(1) |
cfdda9d7
SW		 469 WND_SCALE(wscale) |
470 MSS_IDX(mtu_idx) |
471 L2T_IDX(ep->l2t->idx) |
472 TX_CHAN(ep->tx_chan) |
473 SMAC_SEL(ep->smac_idx) |
474 DSCP(ep->tos) |
b48f3b9c 475 ULP_MODE(ULP_MODE_TCPDDP) |
cfdda9d7
SW		 476 RCV_BUFSIZ(rcv_win>>10);
477 opt2 = RX_CHANNEL(0) |
478 RSS_QUEUE_VALID | RSS_QUEUE(ep->rss_qid);
479 if (enable_tcp_timestamps)
480 opt2 |= TSTAMPS_EN(1);
481 if (enable_tcp_sack)
482 opt2 |= SACK_EN(1);
483 if (wscale && enable_tcp_window_scaling)
484 opt2 |= WND_SCALE_EN(1);
485 t4_set_arp_err_handler(skb, NULL, act_open_req_arp_failure);
486
487 req = (struct cpl_act_open_req *) skb_put(skb, wrlen);
488 INIT_TP_WR(req, 0);
489 OPCODE_TID(req) = cpu_to_be32(
490 MK_OPCODE_TID(CPL_ACT_OPEN_REQ, ((ep->rss_qid<<14)|ep->atid)));
491 req->local_port = ep->com.local_addr.sin_port;
492 req->peer_port = ep->com.remote_addr.sin_port;
493 req->local_ip = ep->com.local_addr.sin_addr.s_addr;
494 req->peer_ip = ep->com.remote_addr.sin_addr.s_addr;
495 req->opt0 = cpu_to_be64(opt0);
496 req->params = 0;
497 req->opt2 = cpu_to_be32(opt2);
498 return c4iw_l2t_send(&ep->com.dev->rdev, skb, ep->l2t);
499}
500
d2fe99e8
KS		 501static void send_mpa_req(struct c4iw_ep *ep, struct sk_buff *skb,
502 u8 mpa_rev_to_use)
cfdda9d7
SW		 503{
504 int mpalen, wrlen;
505 struct fw_ofld_tx_data_wr *req;
506 struct mpa_message *mpa;
d2fe99e8 507 struct mpa_v2_conn_params mpa_v2_params;
cfdda9d7
SW		 508
509 PDBG("%s ep %p tid %u pd_len %d\n", __func__, ep, ep->hwtid, ep->plen);
510
511 BUG_ON(skb_cloned(skb));
512
513 mpalen = sizeof(*mpa) + ep->plen;
d2fe99e8
KS		 514 if (mpa_rev_to_use == 2)
515 mpalen += sizeof(struct mpa_v2_conn_params);
cfdda9d7
SW		 516 wrlen = roundup(mpalen + sizeof *req, 16);
517 skb = get_skb(skb, wrlen, GFP_KERNEL);
518 if (!skb) {
519 connect_reply_upcall(ep, -ENOMEM);
520 return;
521 }
522 set_wr_txq(skb, CPL_PRIORITY_DATA, ep->txq_idx);
523
524 req = (struct fw_ofld_tx_data_wr *)skb_put(skb, wrlen);
525 memset(req, 0, wrlen);
526 req->op_to_immdlen = cpu_to_be32(
527 FW_WR_OP(FW_OFLD_TX_DATA_WR) |
528 FW_WR_COMPL(1) |
529 FW_WR_IMMDLEN(mpalen));
530 req->flowid_len16 = cpu_to_be32(
531 FW_WR_FLOWID(ep->hwtid) |
532 FW_WR_LEN16(wrlen >> 4));
533 req->plen = cpu_to_be32(mpalen);
534 req->tunnel_to_proxy = cpu_to_be32(
535 FW_OFLD_TX_DATA_WR_FLUSH(1) |
536 FW_OFLD_TX_DATA_WR_SHOVE(1));
537
538 mpa = (struct mpa_message *)(req + 1);
539 memcpy(mpa->key, MPA_KEY_REQ, sizeof(mpa->key));
540 mpa->flags = (crc_enabled ? MPA_CRC : 0) |
d2fe99e8
KS		 541 (markers_enabled ? MPA_MARKERS : 0) |
542 (mpa_rev_to_use == 2 ? MPA_ENHANCED_RDMA_CONN : 0);
cfdda9d7 543 mpa->private_data_size = htons(ep->plen);
d2fe99e8 544 mpa->revision = mpa_rev_to_use;
01b225e1 545 if (mpa_rev_to_use == 1) {
d2fe99e8 546 ep->tried_with_mpa_v1 = 1;
01b225e1
KS		 547 ep->retry_with_mpa_v1 = 0;
548 }
d2fe99e8
KS		 549
550 if (mpa_rev_to_use == 2) {
551 mpa->private_data_size +=
552 htons(sizeof(struct mpa_v2_conn_params));
553 mpa_v2_params.ird = htons((u16)ep->ird);
554 mpa_v2_params.ord = htons((u16)ep->ord);
555
556 if (peer2peer) {
557 mpa_v2_params.ird |= htons(MPA_V2_PEER2PEER_MODEL);
558 if (p2p_type == FW_RI_INIT_P2PTYPE_RDMA_WRITE)
559 mpa_v2_params.ord |=
560 htons(MPA_V2_RDMA_WRITE_RTR);
561 else if (p2p_type == FW_RI_INIT_P2PTYPE_READ_REQ)
562 mpa_v2_params.ord |=
563 htons(MPA_V2_RDMA_READ_RTR);
564 }
565 memcpy(mpa->private_data, &mpa_v2_params,
566 sizeof(struct mpa_v2_conn_params));
cfdda9d7 567
d2fe99e8
KS		 568 if (ep->plen)
569 memcpy(mpa->private_data +
570 sizeof(struct mpa_v2_conn_params),
571 ep->mpa_pkt + sizeof(*mpa), ep->plen);
572 } else
573 if (ep->plen)
574 memcpy(mpa->private_data,
575 ep->mpa_pkt + sizeof(*mpa), ep->plen);
cfdda9d7
SW		 576
577 /*
578 * Reference the mpa skb. This ensures the data area
579 * will remain in memory until the hw acks the tx.
580 * Function fw4_ack() will deref it.
581 */
582 skb_get(skb);
583 t4_set_arp_err_handler(skb, NULL, arp_failure_discard);
584 BUG_ON(ep->mpa_skb);
585 ep->mpa_skb = skb;
586 c4iw_l2t_send(&ep->com.dev->rdev, skb, ep->l2t);
587 start_ep_timer(ep);
588 state_set(&ep->com, MPA_REQ_SENT);
589 ep->mpa_attr.initiator = 1;
590 return;
591}
592
593static int send_mpa_reject(struct c4iw_ep *ep, const void *pdata, u8 plen)
594{
595 int mpalen, wrlen;
596 struct fw_ofld_tx_data_wr *req;
597 struct mpa_message *mpa;
598 struct sk_buff *skb;
d2fe99e8 599 struct mpa_v2_conn_params mpa_v2_params;
cfdda9d7
SW		 600
601 PDBG("%s ep %p tid %u pd_len %d\n", __func__, ep, ep->hwtid, ep->plen);
602
603 mpalen = sizeof(*mpa) + plen;
d2fe99e8
KS		 604 if (ep->mpa_attr.version == 2 && ep->mpa_attr.enhanced_rdma_conn)
605 mpalen += sizeof(struct mpa_v2_conn_params);
cfdda9d7
SW		 606 wrlen = roundup(mpalen + sizeof *req, 16);
607
608 skb = get_skb(NULL, wrlen, GFP_KERNEL);
609 if (!skb) {
610 printk(KERN_ERR MOD "%s - cannot alloc skb!\n", __func__);
611 return -ENOMEM;
612 }
613 set_wr_txq(skb, CPL_PRIORITY_DATA, ep->txq_idx);
614
615 req = (struct fw_ofld_tx_data_wr *)skb_put(skb, wrlen);
616 memset(req, 0, wrlen);
617 req->op_to_immdlen = cpu_to_be32(
618 FW_WR_OP(FW_OFLD_TX_DATA_WR) |
619 FW_WR_COMPL(1) |
620 FW_WR_IMMDLEN(mpalen));
621 req->flowid_len16 = cpu_to_be32(
622 FW_WR_FLOWID(ep->hwtid) |
623 FW_WR_LEN16(wrlen >> 4));
624 req->plen = cpu_to_be32(mpalen);
625 req->tunnel_to_proxy = cpu_to_be32(
626 FW_OFLD_TX_DATA_WR_FLUSH(1) |
627 FW_OFLD_TX_DATA_WR_SHOVE(1));
628
629 mpa = (struct mpa_message *)(req + 1);
630 memset(mpa, 0, sizeof(*mpa));
631 memcpy(mpa->key, MPA_KEY_REP, sizeof(mpa->key));
632 mpa->flags = MPA_REJECT;
633 mpa->revision = mpa_rev;
634 mpa->private_data_size = htons(plen);
d2fe99e8
KS		 635
636 if (ep->mpa_attr.version == 2 && ep->mpa_attr.enhanced_rdma_conn) {
637 mpa->flags |= MPA_ENHANCED_RDMA_CONN;
638 mpa->private_data_size +=
639 htons(sizeof(struct mpa_v2_conn_params));
640 mpa_v2_params.ird = htons(((u16)ep->ird) |
641 (peer2peer ? MPA_V2_PEER2PEER_MODEL :
642 0));
643 mpa_v2_params.ord = htons(((u16)ep->ord) | (peer2peer ?
644 (p2p_type ==
645 FW_RI_INIT_P2PTYPE_RDMA_WRITE ?
646 MPA_V2_RDMA_WRITE_RTR : p2p_type ==
647 FW_RI_INIT_P2PTYPE_READ_REQ ?
648 MPA_V2_RDMA_READ_RTR : 0) : 0));
649 memcpy(mpa->private_data, &mpa_v2_params,
650 sizeof(struct mpa_v2_conn_params));
651
652 if (ep->plen)
653 memcpy(mpa->private_data +
654 sizeof(struct mpa_v2_conn_params), pdata, plen);
655 } else
656 if (plen)
657 memcpy(mpa->private_data, pdata, plen);
cfdda9d7
SW		 658
659 /*
660 * Reference the mpa skb again. This ensures the data area
661 * will remain in memory until the hw acks the tx.
662 * Function fw4_ack() will deref it.
663 */
664 skb_get(skb);
665 set_wr_txq(skb, CPL_PRIORITY_DATA, ep->txq_idx);
666 t4_set_arp_err_handler(skb, NULL, arp_failure_discard);
667 BUG_ON(ep->mpa_skb);
668 ep->mpa_skb = skb;
669 return c4iw_l2t_send(&ep->com.dev->rdev, skb, ep->l2t);
670}
671
672static int send_mpa_reply(struct c4iw_ep *ep, const void *pdata, u8 plen)
673{
674 int mpalen, wrlen;
675 struct fw_ofld_tx_data_wr *req;
676 struct mpa_message *mpa;
677 struct sk_buff *skb;
d2fe99e8 678 struct mpa_v2_conn_params mpa_v2_params;
cfdda9d7
SW		 679
680 PDBG("%s ep %p tid %u pd_len %d\n", __func__, ep, ep->hwtid, ep->plen);
681
682 mpalen = sizeof(*mpa) + plen;
d2fe99e8
KS		 683 if (ep->mpa_attr.version == 2 && ep->mpa_attr.enhanced_rdma_conn)
684 mpalen += sizeof(struct mpa_v2_conn_params);
cfdda9d7
SW		 685 wrlen = roundup(mpalen + sizeof *req, 16);
686
687 skb = get_skb(NULL, wrlen, GFP_KERNEL);
688 if (!skb) {
689 printk(KERN_ERR MOD "%s - cannot alloc skb!\n", __func__);
690 return -ENOMEM;
691 }
692 set_wr_txq(skb, CPL_PRIORITY_DATA, ep->txq_idx);
693
694 req = (struct fw_ofld_tx_data_wr *) skb_put(skb, wrlen);
695 memset(req, 0, wrlen);
696 req->op_to_immdlen = cpu_to_be32(
697 FW_WR_OP(FW_OFLD_TX_DATA_WR) |
698 FW_WR_COMPL(1) |
699 FW_WR_IMMDLEN(mpalen));
700 req->flowid_len16 = cpu_to_be32(
701 FW_WR_FLOWID(ep->hwtid) |
702 FW_WR_LEN16(wrlen >> 4));
703 req->plen = cpu_to_be32(mpalen);
704 req->tunnel_to_proxy = cpu_to_be32(
705 FW_OFLD_TX_DATA_WR_FLUSH(1) |
706 FW_OFLD_TX_DATA_WR_SHOVE(1));
707
708 mpa = (struct mpa_message *)(req + 1);
709 memset(mpa, 0, sizeof(*mpa));
710 memcpy(mpa->key, MPA_KEY_REP, sizeof(mpa->key));
711 mpa->flags = (ep->mpa_attr.crc_enabled ? MPA_CRC : 0) |
712 (markers_enabled ? MPA_MARKERS : 0);
d2fe99e8 713 mpa->revision = ep->mpa_attr.version;
cfdda9d7 714 mpa->private_data_size = htons(plen);
d2fe99e8
KS		 715
716 if (ep->mpa_attr.version == 2 && ep->mpa_attr.enhanced_rdma_conn) {
717 mpa->flags |= MPA_ENHANCED_RDMA_CONN;
718 mpa->private_data_size +=
719 htons(sizeof(struct mpa_v2_conn_params));
720 mpa_v2_params.ird = htons((u16)ep->ird);
721 mpa_v2_params.ord = htons((u16)ep->ord);
722 if (peer2peer && (ep->mpa_attr.p2p_type !=
723 FW_RI_INIT_P2PTYPE_DISABLED)) {
724 mpa_v2_params.ird |= htons(MPA_V2_PEER2PEER_MODEL);
725
726 if (p2p_type == FW_RI_INIT_P2PTYPE_RDMA_WRITE)
727 mpa_v2_params.ord |=
728 htons(MPA_V2_RDMA_WRITE_RTR);
729 else if (p2p_type == FW_RI_INIT_P2PTYPE_READ_REQ)
730 mpa_v2_params.ord |=
731 htons(MPA_V2_RDMA_READ_RTR);
732 }
733
734 memcpy(mpa->private_data, &mpa_v2_params,
735 sizeof(struct mpa_v2_conn_params));
736
737 if (ep->plen)
738 memcpy(mpa->private_data +
739 sizeof(struct mpa_v2_conn_params), pdata, plen);
740 } else
741 if (plen)
742 memcpy(mpa->private_data, pdata, plen);
cfdda9d7
SW		 743
744 /*
745 * Reference the mpa skb. This ensures the data area
746 * will remain in memory until the hw acks the tx.
747 * Function fw4_ack() will deref it.
748 */
749 skb_get(skb);
750 t4_set_arp_err_handler(skb, NULL, arp_failure_discard);
751 ep->mpa_skb = skb;
752 state_set(&ep->com, MPA_REP_SENT);
753 return c4iw_l2t_send(&ep->com.dev->rdev, skb, ep->l2t);
754}
755
756static int act_establish(struct c4iw_dev *dev, struct sk_buff *skb)
757{
758 struct c4iw_ep *ep;
759 struct cpl_act_establish *req = cplhdr(skb);
760 unsigned int tid = GET_TID(req);
761 unsigned int atid = GET_TID_TID(ntohl(req->tos_atid));
762 struct tid_info *t = dev->rdev.lldi.tids;
763
764 ep = lookup_atid(t, atid);
765
766 PDBG("%s ep %p tid %u snd_isn %u rcv_isn %u\n", __func__, ep, tid,
767 be32_to_cpu(req->snd_isn), be32_to_cpu(req->rcv_isn));
768
769 dst_confirm(ep->dst);
770
771 /* setup the hwtid for this connection */
772 ep->hwtid = tid;
773 cxgb4_insert_tid(t, ep, tid);
774
775 ep->snd_seq = be32_to_cpu(req->snd_isn);
776 ep->rcv_seq = be32_to_cpu(req->rcv_isn);
777
778 set_emss(ep, ntohs(req->tcp_opt));
779
780 /* dealloc the atid */
781 cxgb4_free_atid(t, atid);
782
783 /* start MPA negotiation */
784 send_flowc(ep, NULL);
d2fe99e8
KS		 785 if (ep->retry_with_mpa_v1)
786 send_mpa_req(ep, skb, 1);
787 else
788 send_mpa_req(ep, skb, mpa_rev);
cfdda9d7
SW		 789
790 return 0;
791}
792
793static void close_complete_upcall(struct c4iw_ep *ep)
794{
795 struct iw_cm_event event;
796
797 PDBG("%s ep %p tid %u\n", __func__, ep, ep->hwtid);
798 memset(&event, 0, sizeof(event));
799 event.event = IW_CM_EVENT_CLOSE;
800 if (ep->com.cm_id) {
801 PDBG("close complete delivered ep %p cm_id %p tid %u\n",
802 ep, ep->com.cm_id, ep->hwtid);
803 ep->com.cm_id->event_handler(ep->com.cm_id, &event);
804 ep->com.cm_id->rem_ref(ep->com.cm_id);
805 ep->com.cm_id = NULL;
806 ep->com.qp = NULL;
807 }
808}
809
810static int abort_connection(struct c4iw_ep *ep, struct sk_buff *skb, gfp_t gfp)
811{
812 PDBG("%s ep %p tid %u\n", __func__, ep, ep->hwtid);
813 close_complete_upcall(ep);
814 state_set(&ep->com, ABORTING);
815 return send_abort(ep, skb, gfp);
816}
817
818static void peer_close_upcall(struct c4iw_ep *ep)
819{
820 struct iw_cm_event event;
821
822 PDBG("%s ep %p tid %u\n", __func__, ep, ep->hwtid);
823 memset(&event, 0, sizeof(event));
824 event.event = IW_CM_EVENT_DISCONNECT;
825 if (ep->com.cm_id) {
826 PDBG("peer close delivered ep %p cm_id %p tid %u\n",
827 ep, ep->com.cm_id, ep->hwtid);
828 ep->com.cm_id->event_handler(ep->com.cm_id, &event);
829 }
830}
831
832static void peer_abort_upcall(struct c4iw_ep *ep)
833{
834 struct iw_cm_event event;
835
836 PDBG("%s ep %p tid %u\n", __func__, ep, ep->hwtid);
837 memset(&event, 0, sizeof(event));
838 event.event = IW_CM_EVENT_CLOSE;
839 event.status = -ECONNRESET;
840 if (ep->com.cm_id) {
841 PDBG("abort delivered ep %p cm_id %p tid %u\n", ep,
842 ep->com.cm_id, ep->hwtid);
843 ep->com.cm_id->event_handler(ep->com.cm_id, &event);
844 ep->com.cm_id->rem_ref(ep->com.cm_id);
845 ep->com.cm_id = NULL;
846 ep->com.qp = NULL;
847 }
848}
849
850static void connect_reply_upcall(struct c4iw_ep *ep, int status)
851{
852 struct iw_cm_event event;
853
854 PDBG("%s ep %p tid %u status %d\n", __func__, ep, ep->hwtid, status);
855 memset(&event, 0, sizeof(event));
856 event.event = IW_CM_EVENT_CONNECT_REPLY;
857 event.status = status;
858 event.local_addr = ep->com.local_addr;
859 event.remote_addr = ep->com.remote_addr;
860
861 if ((status == 0) || (status == -ECONNREFUSED)) {
d2fe99e8
KS		 862 if (!ep->tried_with_mpa_v1) {
863 /* this means MPA_v2 is used */
864 event.private_data_len = ep->plen -
865 sizeof(struct mpa_v2_conn_params);
866 event.private_data = ep->mpa_pkt +
867 sizeof(struct mpa_message) +
868 sizeof(struct mpa_v2_conn_params);
869 } else {
870 /* this means MPA_v1 is used */
871 event.private_data_len = ep->plen;
872 event.private_data = ep->mpa_pkt +
873 sizeof(struct mpa_message);
874 }
cfdda9d7 875 }
85963e4c
RD		 876
877 PDBG("%s ep %p tid %u status %d\n", __func__, ep,
878 ep->hwtid, status);
879 ep->com.cm_id->event_handler(ep->com.cm_id, &event);
880
cfdda9d7
SW		 881 if (status < 0) {
882 ep->com.cm_id->rem_ref(ep->com.cm_id);
883 ep->com.cm_id = NULL;
884 ep->com.qp = NULL;
885 }
886}
887
888static void connect_request_upcall(struct c4iw_ep *ep)
889{
890 struct iw_cm_event event;
891
892 PDBG("%s ep %p tid %u\n", __func__, ep, ep->hwtid);
893 memset(&event, 0, sizeof(event));
894 event.event = IW_CM_EVENT_CONNECT_REQUEST;
895 event.local_addr = ep->com.local_addr;
896 event.remote_addr = ep->com.remote_addr;
cfdda9d7 897 event.provider_data = ep;
d2fe99e8
KS		 898 if (!ep->tried_with_mpa_v1) {
899 /* this means MPA_v2 is used */
900 event.ord = ep->ord;
901 event.ird = ep->ird;
902 event.private_data_len = ep->plen -
903 sizeof(struct mpa_v2_conn_params);
904 event.private_data = ep->mpa_pkt + sizeof(struct mpa_message) +
905 sizeof(struct mpa_v2_conn_params);
906 } else {
907 /* this means MPA_v1 is used. Send max supported */
908 event.ord = c4iw_max_read_depth;
909 event.ird = c4iw_max_read_depth;
910 event.private_data_len = ep->plen;
911 event.private_data = ep->mpa_pkt + sizeof(struct mpa_message);
912 }
cfdda9d7
SW		 913 if (state_read(&ep->parent_ep->com) != DEAD) {
914 c4iw_get_ep(&ep->com);
915 ep->parent_ep->com.cm_id->event_handler(
916 ep->parent_ep->com.cm_id,
917 &event);
918 }
919 c4iw_put_ep(&ep->parent_ep->com);
920 ep->parent_ep = NULL;
921}
922
923static void established_upcall(struct c4iw_ep *ep)
924{
925 struct iw_cm_event event;
926
927 PDBG("%s ep %p tid %u\n", __func__, ep, ep->hwtid);
928 memset(&event, 0, sizeof(event));
929 event.event = IW_CM_EVENT_ESTABLISHED;
d2fe99e8
KS		 930 event.ird = ep->ird;
931 event.ord = ep->ord;
cfdda9d7
SW		 932 if (ep->com.cm_id) {
933 PDBG("%s ep %p tid %u\n", __func__, ep, ep->hwtid);
934 ep->com.cm_id->event_handler(ep->com.cm_id, &event);
935 }
936}
937
938static int update_rx_credits(struct c4iw_ep *ep, u32 credits)
939{
940 struct cpl_rx_data_ack *req;
941 struct sk_buff *skb;
942 int wrlen = roundup(sizeof *req, 16);
943
944 PDBG("%s ep %p tid %u credits %u\n", __func__, ep, ep->hwtid, credits);
945 skb = get_skb(NULL, wrlen, GFP_KERNEL);
946 if (!skb) {
947 printk(KERN_ERR MOD "update_rx_credits - cannot alloc skb!\n");
948 return 0;
949 }
950
951 req = (struct cpl_rx_data_ack *) skb_put(skb, wrlen);
952 memset(req, 0, wrlen);
953 INIT_TP_WR(req, ep->hwtid);
954 OPCODE_TID(req) = cpu_to_be32(MK_OPCODE_TID(CPL_RX_DATA_ACK,
955 ep->hwtid));
ba6d3925
SW		 956 req->credit_dack = cpu_to_be32(credits | RX_FORCE_ACK(1) |
957 F_RX_DACK_CHANGE |
958 V_RX_DACK_MODE(dack_mode));
d4f1a5c6 959 set_wr_txq(skb, CPL_PRIORITY_ACK, ep->ctrlq_idx);
cfdda9d7
SW		 960 c4iw_ofld_send(&ep->com.dev->rdev, skb);
961 return credits;
962}
963
964static void process_mpa_reply(struct c4iw_ep *ep, struct sk_buff *skb)
965{
966 struct mpa_message *mpa;
d2fe99e8 967 struct mpa_v2_conn_params *mpa_v2_params;
cfdda9d7 968 u16 plen;
d2fe99e8
KS		 969 u16 resp_ird, resp_ord;
970 u8 rtr_mismatch = 0, insuff_ird = 0;
cfdda9d7
SW		 971 struct c4iw_qp_attributes attrs;
972 enum c4iw_qp_attr_mask mask;
973 int err;
974
975 PDBG("%s ep %p tid %u\n", __func__, ep, ep->hwtid);
976
977 /*
978 * Stop mpa timer. If it expired, then the state has
979 * changed and we bail since ep_timeout already aborted
980 * the connection.
981 */
982 stop_ep_timer(ep);
983 if (state_read(&ep->com) != MPA_REQ_SENT)
984 return;
985
986 /*
987 * If we get more than the supported amount of private data
988 * then we must fail this connection.
989 */
990 if (ep->mpa_pkt_len + skb->len > sizeof(ep->mpa_pkt)) {
991 err = -EINVAL;
992 goto err;
993 }
994
995 /*
996 * copy the new data into our accumulation buffer.
997 */
998 skb_copy_from_linear_data(skb, &(ep->mpa_pkt[ep->mpa_pkt_len]),
999 skb->len);
1000 ep->mpa_pkt_len += skb->len;
1001
1002 /*
1003 * if we don't even have the mpa message, then bail.
1004 */
1005 if (ep->mpa_pkt_len < sizeof(*mpa))
1006 return;
1007 mpa = (struct mpa_message *) ep->mpa_pkt;
1008
1009 /* Validate MPA header. */
d2fe99e8
KS		 1010 if (mpa->revision > mpa_rev) {
1011 printk(KERN_ERR MOD "%s MPA version mismatch. Local = %d,"
1012 " Received = %d\n", __func__, mpa_rev, mpa->revision);
cfdda9d7
SW		 1013 err = -EPROTO;
1014 goto err;
1015 }
1016 if (memcmp(mpa->key, MPA_KEY_REP, sizeof(mpa->key))) {
1017 err = -EPROTO;
1018 goto err;
1019 }
1020
1021 plen = ntohs(mpa->private_data_size);
1022
1023 /*
1024 * Fail if there's too much private data.
1025 */
1026 if (plen > MPA_MAX_PRIVATE_DATA) {
1027 err = -EPROTO;
1028 goto err;
1029 }
1030
1031 /*
1032 * If plen does not account for pkt size
1033 */
1034 if (ep->mpa_pkt_len > (sizeof(*mpa) + plen)) {
1035 err = -EPROTO;
1036 goto err;
1037 }
1038
1039 ep->plen = (u8) plen;
1040
1041 /*
1042 * If we don't have all the pdata yet, then bail.
1043 * We'll continue process when more data arrives.
1044 */
1045 if (ep->mpa_pkt_len < (sizeof(*mpa) + plen))
1046 return;
1047
1048 if (mpa->flags & MPA_REJECT) {
1049 err = -ECONNREFUSED;
1050 goto err;
1051 }
1052
1053 /*
1054 * If we get here we have accumulated the entire mpa
1055 * start reply message including private data. And
1056 * the MPA header is valid.
1057 */
1058 state_set(&ep->com, FPDU_MODE);
1059 ep->mpa_attr.crc_enabled = (mpa->flags & MPA_CRC) | crc_enabled ? 1 : 0;
1060 ep->mpa_attr.recv_marker_enabled = markers_enabled;
1061 ep->mpa_attr.xmit_marker_enabled = mpa->flags & MPA_MARKERS ? 1 : 0;
d2fe99e8
KS		 1062 ep->mpa_attr.version = mpa->revision;
1063 ep->mpa_attr.p2p_type = FW_RI_INIT_P2PTYPE_DISABLED;
1064
1065 if (mpa->revision == 2) {
1066 ep->mpa_attr.enhanced_rdma_conn =
1067 mpa->flags & MPA_ENHANCED_RDMA_CONN ? 1 : 0;
1068 if (ep->mpa_attr.enhanced_rdma_conn) {
1069 mpa_v2_params = (struct mpa_v2_conn_params *)
1070 (ep->mpa_pkt + sizeof(*mpa));
1071 resp_ird = ntohs(mpa_v2_params->ird) &
1072 MPA_V2_IRD_ORD_MASK;
1073 resp_ord = ntohs(mpa_v2_params->ord) &
1074 MPA_V2_IRD_ORD_MASK;
1075
1076 /*
1077 * This is a double-check. Ideally, below checks are
1078 * not required since ird/ord stuff has been taken
1079 * care of in c4iw_accept_cr
1080 */
1081 if ((ep->ird < resp_ord) || (ep->ord > resp_ird)) {
1082 err = -ENOMEM;
1083 ep->ird = resp_ord;
1084 ep->ord = resp_ird;
1085 insuff_ird = 1;
1086 }
1087
1088 if (ntohs(mpa_v2_params->ird) &
1089 MPA_V2_PEER2PEER_MODEL) {
1090 if (ntohs(mpa_v2_params->ord) &
1091 MPA_V2_RDMA_WRITE_RTR)
1092 ep->mpa_attr.p2p_type =
1093 FW_RI_INIT_P2PTYPE_RDMA_WRITE;
1094 else if (ntohs(mpa_v2_params->ord) &
1095 MPA_V2_RDMA_READ_RTR)
1096 ep->mpa_attr.p2p_type =
1097 FW_RI_INIT_P2PTYPE_READ_REQ;
1098 }
1099 }
1100 } else if (mpa->revision == 1)
1101 if (peer2peer)
1102 ep->mpa_attr.p2p_type = p2p_type;
1103
cfdda9d7 1104 PDBG("%s - crc_enabled=%d, recv_marker_enabled=%d, "
d2fe99e8
KS		 1105 "xmit_marker_enabled=%d, version=%d p2p_type=%d local-p2p_type = "
1106 "%d\n", __func__, ep->mpa_attr.crc_enabled,
1107 ep->mpa_attr.recv_marker_enabled,
1108 ep->mpa_attr.xmit_marker_enabled, ep->mpa_attr.version,
1109 ep->mpa_attr.p2p_type, p2p_type);
1110
1111 /*
1112 * If responder's RTR does not match with that of initiator, assign
1113 * FW_RI_INIT_P2PTYPE_DISABLED in mpa attributes so that RTR is not
1114 * generated when moving QP to RTS state.
1115 * A TERM message will be sent after QP has moved to RTS state
1116 */
1117 if ((ep->mpa_attr.version == 2) &&
1118 (ep->mpa_attr.p2p_type != p2p_type)) {
1119 ep->mpa_attr.p2p_type = FW_RI_INIT_P2PTYPE_DISABLED;
1120 rtr_mismatch = 1;
1121 }
cfdda9d7
SW		 1122
1123 attrs.mpa_attr = ep->mpa_attr;
1124 attrs.max_ird = ep->ird;
1125 attrs.max_ord = ep->ord;
1126 attrs.llp_stream_handle = ep;
1127 attrs.next_state = C4IW_QP_STATE_RTS;
1128
1129 mask = C4IW_QP_ATTR_NEXT_STATE |
1130 C4IW_QP_ATTR_LLP_STREAM_HANDLE | C4IW_QP_ATTR_MPA_ATTR |
1131 C4IW_QP_ATTR_MAX_IRD | C4IW_QP_ATTR_MAX_ORD;
1132
1133 /* bind QP and TID with INIT_WR */
1134 err = c4iw_modify_qp(ep->com.qp->rhp,
1135 ep->com.qp, mask, &attrs, 1);
1136 if (err)
1137 goto err;
d2fe99e8
KS		 1138
1139 /*
1140 * If responder's RTR requirement did not match with what initiator
1141 * supports, generate TERM message
1142 */
1143 if (rtr_mismatch) {
1144 printk(KERN_ERR "%s: RTR mismatch, sending TERM\n", __func__);
1145 attrs.layer_etype = LAYER_MPA | DDP_LLP;
1146 attrs.ecode = MPA_NOMATCH_RTR;
1147 attrs.next_state = C4IW_QP_STATE_TERMINATE;
1148 err = c4iw_modify_qp(ep->com.qp->rhp, ep->com.qp,
1149 C4IW_QP_ATTR_NEXT_STATE, &attrs, 0);
1150 err = -ENOMEM;
1151 goto out;
1152 }
1153
1154 /*
1155 * Generate TERM if initiator IRD is not sufficient for responder
1156 * provided ORD. Currently, we do the same behaviour even when
1157 * responder provided IRD is also not sufficient as regards to
1158 * initiator ORD.
1159 */
1160 if (insuff_ird) {
1161 printk(KERN_ERR "%s: Insufficient IRD, sending TERM\n",
1162 __func__);
1163 attrs.layer_etype = LAYER_MPA | DDP_LLP;
1164 attrs.ecode = MPA_INSUFF_IRD;
1165 attrs.next_state = C4IW_QP_STATE_TERMINATE;
1166 err = c4iw_modify_qp(ep->com.qp->rhp, ep->com.qp,
1167 C4IW_QP_ATTR_NEXT_STATE, &attrs, 0);
1168 err = -ENOMEM;
1169 goto out;
1170 }
cfdda9d7
SW		 1171 goto out;
1172err:
b21ef16a
SW		 1173 state_set(&ep->com, ABORTING);
1174 send_abort(ep, skb, GFP_KERNEL);
cfdda9d7
SW		 1175out:
1176 connect_reply_upcall(ep, err);
1177 return;
1178}
1179
1180static void process_mpa_request(struct c4iw_ep *ep, struct sk_buff *skb)
1181{
1182 struct mpa_message *mpa;
d2fe99e8 1183 struct mpa_v2_conn_params *mpa_v2_params;
cfdda9d7
SW		 1184 u16 plen;
1185
1186 PDBG("%s ep %p tid %u\n", __func__, ep, ep->hwtid);
1187
1188 if (state_read(&ep->com) != MPA_REQ_WAIT)
1189 return;
1190
1191 /*
1192 * If we get more than the supported amount of private data
1193 * then we must fail this connection.
1194 */
1195 if (ep->mpa_pkt_len + skb->len > sizeof(ep->mpa_pkt)) {
1196 stop_ep_timer(ep);
1197 abort_connection(ep, skb, GFP_KERNEL);
1198 return;
1199 }
1200
1201 PDBG("%s enter (%s line %u)\n", __func__, __FILE__, __LINE__);
1202
1203 /*
1204 * Copy the new data into our accumulation buffer.
1205 */
1206 skb_copy_from_linear_data(skb, &(ep->mpa_pkt[ep->mpa_pkt_len]),
1207 skb->len);
1208 ep->mpa_pkt_len += skb->len;
1209
1210 /*
1211 * If we don't even have the mpa message, then bail.
1212 * We'll continue process when more data arrives.
1213 */
1214 if (ep->mpa_pkt_len < sizeof(*mpa))
1215 return;
1216
1217 PDBG("%s enter (%s line %u)\n", __func__, __FILE__, __LINE__);
1218 stop_ep_timer(ep);
1219 mpa = (struct mpa_message *) ep->mpa_pkt;
1220
1221 /*
1222 * Validate MPA Header.
1223 */
d2fe99e8
KS		 1224 if (mpa->revision > mpa_rev) {
1225 printk(KERN_ERR MOD "%s MPA version mismatch. Local = %d,"
1226 " Received = %d\n", __func__, mpa_rev, mpa->revision);
cfdda9d7
SW		 1227 abort_connection(ep, skb, GFP_KERNEL);
1228 return;
1229 }
1230
1231 if (memcmp(mpa->key, MPA_KEY_REQ, sizeof(mpa->key))) {
1232 abort_connection(ep, skb, GFP_KERNEL);
1233 return;
1234 }
1235
1236 plen = ntohs(mpa->private_data_size);
1237
1238 /*
1239 * Fail if there's too much private data.
1240 */
1241 if (plen > MPA_MAX_PRIVATE_DATA) {
1242 abort_connection(ep, skb, GFP_KERNEL);
1243 return;
1244 }
1245
1246 /*
1247 * If plen does not account for pkt size
1248 */
1249 if (ep->mpa_pkt_len > (sizeof(*mpa) + plen)) {
1250 abort_connection(ep, skb, GFP_KERNEL);
1251 return;
1252 }
1253 ep->plen = (u8) plen;
1254
1255 /*
1256 * If we don't have all the pdata yet, then bail.
1257 */
1258 if (ep->mpa_pkt_len < (sizeof(*mpa) + plen))
1259 return;
1260
1261 /*
1262 * If we get here we have accumulated the entire mpa
1263 * start reply message including private data.
1264 */
1265 ep->mpa_attr.initiator = 0;
1266 ep->mpa_attr.crc_enabled = (mpa->flags & MPA_CRC) | crc_enabled ? 1 : 0;
1267 ep->mpa_attr.recv_marker_enabled = markers_enabled;
1268 ep->mpa_attr.xmit_marker_enabled = mpa->flags & MPA_MARKERS ? 1 : 0;
d2fe99e8
KS		 1269 ep->mpa_attr.version = mpa->revision;
1270 if (mpa->revision == 1)
1271 ep->tried_with_mpa_v1 = 1;
1272 ep->mpa_attr.p2p_type = FW_RI_INIT_P2PTYPE_DISABLED;
1273
1274 if (mpa->revision == 2) {
1275 ep->mpa_attr.enhanced_rdma_conn =
1276 mpa->flags & MPA_ENHANCED_RDMA_CONN ? 1 : 0;
1277 if (ep->mpa_attr.enhanced_rdma_conn) {
1278 mpa_v2_params = (struct mpa_v2_conn_params *)
1279 (ep->mpa_pkt + sizeof(*mpa));
1280 ep->ird = ntohs(mpa_v2_params->ird) &
1281 MPA_V2_IRD_ORD_MASK;
1282 ep->ord = ntohs(mpa_v2_params->ord) &
1283 MPA_V2_IRD_ORD_MASK;
1284 if (ntohs(mpa_v2_params->ird) & MPA_V2_PEER2PEER_MODEL)
1285 if (peer2peer) {
1286 if (ntohs(mpa_v2_params->ord) &
1287 MPA_V2_RDMA_WRITE_RTR)
1288 ep->mpa_attr.p2p_type =
1289 FW_RI_INIT_P2PTYPE_RDMA_WRITE;
1290 else if (ntohs(mpa_v2_params->ord) &
1291 MPA_V2_RDMA_READ_RTR)
1292 ep->mpa_attr.p2p_type =
1293 FW_RI_INIT_P2PTYPE_READ_REQ;
1294 }
1295 }
1296 } else if (mpa->revision == 1)
1297 if (peer2peer)
1298 ep->mpa_attr.p2p_type = p2p_type;
1299
cfdda9d7
SW		 1300 PDBG("%s - crc_enabled=%d, recv_marker_enabled=%d, "
1301 "xmit_marker_enabled=%d, version=%d p2p_type=%d\n", __func__,
1302 ep->mpa_attr.crc_enabled, ep->mpa_attr.recv_marker_enabled,
1303 ep->mpa_attr.xmit_marker_enabled, ep->mpa_attr.version,
1304 ep->mpa_attr.p2p_type);
1305
1306 state_set(&ep->com, MPA_REQ_RCVD);
1307
1308 /* drive upcall */
1309 connect_request_upcall(ep);
1310 return;
1311}
1312
1313static int rx_data(struct c4iw_dev *dev, struct sk_buff *skb)
1314{
1315 struct c4iw_ep *ep;
1316 struct cpl_rx_data *hdr = cplhdr(skb);
1317 unsigned int dlen = ntohs(hdr->len);
1318 unsigned int tid = GET_TID(hdr);
1319 struct tid_info *t = dev->rdev.lldi.tids;
1320
1321 ep = lookup_tid(t, tid);
1322 PDBG("%s ep %p tid %u dlen %u\n", __func__, ep, ep->hwtid, dlen);
1323 skb_pull(skb, sizeof(*hdr));
1324 skb_trim(skb, dlen);
1325
1326 ep->rcv_seq += dlen;
1327 BUG_ON(ep->rcv_seq != (ntohl(hdr->seq) + dlen));
1328
1329 /* update RX credits */
1330 update_rx_credits(ep, dlen);
1331
1332 switch (state_read(&ep->com)) {
1333 case MPA_REQ_SENT:
1334 process_mpa_reply(ep, skb);
1335 break;
1336 case MPA_REQ_WAIT:
1337 process_mpa_request(ep, skb);
1338 break;
1339 case MPA_REP_SENT:
1340 break;
1341 default:
1342 printk(KERN_ERR MOD "%s Unexpected streaming data."
1343 " ep %p state %d tid %u\n",
1344 __func__, ep, state_read(&ep->com), ep->hwtid);
1345
1346 /*
1347 * The ep will timeout and inform the ULP of the failure.
1348 * See ep_timeout().
1349 */
1350 break;
1351 }
1352 return 0;
1353}
1354
1355static int abort_rpl(struct c4iw_dev *dev, struct sk_buff *skb)
1356{
1357 struct c4iw_ep *ep;
1358 struct cpl_abort_rpl_rss *rpl = cplhdr(skb);
cfdda9d7
SW		 1359 int release = 0;
1360 unsigned int tid = GET_TID(rpl);
1361 struct tid_info *t = dev->rdev.lldi.tids;
1362
1363 ep = lookup_tid(t, tid);
1364 PDBG("%s ep %p tid %u\n", __func__, ep, ep->hwtid);
1365 BUG_ON(!ep);
2f5b48c3 1366 mutex_lock(&ep->com.mutex);
cfdda9d7
SW		 1367 switch (ep->com.state) {
1368 case ABORTING:
1369 __state_set(&ep->com, DEAD);
1370 release = 1;
1371 break;
1372 default:
1373 printk(KERN_ERR "%s ep %p state %d\n",
1374 __func__, ep, ep->com.state);
1375 break;
1376 }
2f5b48c3 1377 mutex_unlock(&ep->com.mutex);
cfdda9d7
SW		 1378
1379 if (release)
1380 release_ep_resources(ep);
1381 return 0;
1382}
1383
1384/*
1385 * Return whether a failed active open has allocated a TID
1386 */
1387static inline int act_open_has_tid(int status)
1388{
1389 return status != CPL_ERR_TCAM_FULL && status != CPL_ERR_CONN_EXIST &&
1390 status != CPL_ERR_ARP_MISS;
1391}
1392
1393static int act_open_rpl(struct c4iw_dev *dev, struct sk_buff *skb)
1394{
1395 struct c4iw_ep *ep;
1396 struct cpl_act_open_rpl *rpl = cplhdr(skb);
1397 unsigned int atid = GET_TID_TID(GET_AOPEN_ATID(
1398 ntohl(rpl->atid_status)));
1399 struct tid_info *t = dev->rdev.lldi.tids;
1400 int status = GET_AOPEN_STATUS(ntohl(rpl->atid_status));
1401
1402 ep = lookup_atid(t, atid);
1403
1404 PDBG("%s ep %p atid %u status %u errno %d\n", __func__, ep, atid,
1405 status, status2errno(status));
1406
1407 if (status == CPL_ERR_RTX_NEG_ADVICE) {
1408 printk(KERN_WARNING MOD "Connection problems for atid %u\n",
1409 atid);
1410 return 0;
1411 }
1412
1413 connect_reply_upcall(ep, status2errno(status));
1414 state_set(&ep->com, DEAD);
1415
1416 if (status && act_open_has_tid(status))
1417 cxgb4_remove_tid(ep->com.dev->rdev.lldi.tids, 0, GET_TID(rpl));
1418
1419 cxgb4_free_atid(t, atid);
1420 dst_release(ep->dst);
1421 cxgb4_l2t_release(ep->l2t);
1422 c4iw_put_ep(&ep->com);
1423
1424 return 0;
1425}
1426
1427static int pass_open_rpl(struct c4iw_dev *dev, struct sk_buff *skb)
1428{
1429 struct cpl_pass_open_rpl *rpl = cplhdr(skb);
1430 struct tid_info *t = dev->rdev.lldi.tids;
1431 unsigned int stid = GET_TID(rpl);
1432 struct c4iw_listen_ep *ep = lookup_stid(t, stid);
1433
1434 if (!ep) {
1435 printk(KERN_ERR MOD "stid %d lookup failure!\n", stid);
1436 return 0;
1437 }
1438 PDBG("%s ep %p status %d error %d\n", __func__, ep,
1439 rpl->status, status2errno(rpl->status));
d9594d99 1440 c4iw_wake_up(&ep->com.wr_wait, status2errno(rpl->status));
cfdda9d7
SW		 1441
1442 return 0;
1443}
1444
1445static int listen_stop(struct c4iw_listen_ep *ep)
1446{
1447 struct sk_buff *skb;
1448 struct cpl_close_listsvr_req *req;
1449
1450 PDBG("%s ep %p\n", __func__, ep);
1451 skb = get_skb(NULL, sizeof(*req), GFP_KERNEL);
1452 if (!skb) {
1453 printk(KERN_ERR MOD "%s - failed to alloc skb\n", __func__);
1454 return -ENOMEM;
1455 }
1456 req = (struct cpl_close_listsvr_req *) skb_put(skb, sizeof(*req));
1457 INIT_TP_WR(req, 0);
1458 OPCODE_TID(req) = cpu_to_be32(MK_OPCODE_TID(CPL_CLOSE_LISTSRV_REQ,
1459 ep->stid));
1460 req->reply_ctrl = cpu_to_be16(
1461 QUEUENO(ep->com.dev->rdev.lldi.rxq_ids[0]));
1462 set_wr_txq(skb, CPL_PRIORITY_SETUP, 0);
1463 return c4iw_ofld_send(&ep->com.dev->rdev, skb);
1464}
1465
1466static int close_listsrv_rpl(struct c4iw_dev *dev, struct sk_buff *skb)
1467{
1468 struct cpl_close_listsvr_rpl *rpl = cplhdr(skb);
1469 struct tid_info *t = dev->rdev.lldi.tids;
1470 unsigned int stid = GET_TID(rpl);
1471 struct c4iw_listen_ep *ep = lookup_stid(t, stid);
1472
1473 PDBG("%s ep %p\n", __func__, ep);
d9594d99 1474 c4iw_wake_up(&ep->com.wr_wait, status2errno(rpl->status));
cfdda9d7
SW		 1475 return 0;
1476}
1477
1478static void accept_cr(struct c4iw_ep *ep, __be32 peer_ip, struct sk_buff *skb,
1479 struct cpl_pass_accept_req *req)
1480{
1481 struct cpl_pass_accept_rpl *rpl;
1482 unsigned int mtu_idx;
1483 u64 opt0;
1484 u32 opt2;
1485 int wscale;
1486
1487 PDBG("%s ep %p tid %u\n", __func__, ep, ep->hwtid);
1488 BUG_ON(skb_cloned(skb));
1489 skb_trim(skb, sizeof(*rpl));
1490 skb_get(skb);
1491 cxgb4_best_mtu(ep->com.dev->rdev.lldi.mtus, ep->mtu, &mtu_idx);
1492 wscale = compute_wscale(rcv_win);
1493 opt0 = KEEP_ALIVE(1) |
ba6d3925 1494 DELACK(1) |
cfdda9d7
SW		 1495 WND_SCALE(wscale) |
1496 MSS_IDX(mtu_idx) |
1497 L2T_IDX(ep->l2t->idx) |
1498 TX_CHAN(ep->tx_chan) |
1499 SMAC_SEL(ep->smac_idx) |
1500 DSCP(ep->tos) |
b48f3b9c 1501 ULP_MODE(ULP_MODE_TCPDDP) |
cfdda9d7
SW		 1502 RCV_BUFSIZ(rcv_win>>10);
1503 opt2 = RX_CHANNEL(0) |
1504 RSS_QUEUE_VALID | RSS_QUEUE(ep->rss_qid);
1505
1506 if (enable_tcp_timestamps && req->tcpopt.tstamp)
1507 opt2 |= TSTAMPS_EN(1);
1508 if (enable_tcp_sack && req->tcpopt.sack)
1509 opt2 |= SACK_EN(1);
1510 if (wscale && enable_tcp_window_scaling)
1511 opt2 |= WND_SCALE_EN(1);
1512
1513 rpl = cplhdr(skb);
1514 INIT_TP_WR(rpl, ep->hwtid);
1515 OPCODE_TID(rpl) = cpu_to_be32(MK_OPCODE_TID(CPL_PASS_ACCEPT_RPL,
1516 ep->hwtid));
1517 rpl->opt0 = cpu_to_be64(opt0);
1518 rpl->opt2 = cpu_to_be32(opt2);
d4f1a5c6 1519 set_wr_txq(skb, CPL_PRIORITY_SETUP, ep->ctrlq_idx);
cfdda9d7
SW		 1520 c4iw_l2t_send(&ep->com.dev->rdev, skb, ep->l2t);
1521
1522 return;
1523}
1524
1525static void reject_cr(struct c4iw_dev *dev, u32 hwtid, __be32 peer_ip,
1526 struct sk_buff *skb)
1527{
1528 PDBG("%s c4iw_dev %p tid %u peer_ip %x\n", __func__, dev, hwtid,
1529 peer_ip);
1530 BUG_ON(skb_cloned(skb));
1531 skb_trim(skb, sizeof(struct cpl_tid_release));
1532 skb_get(skb);
1533 release_tid(&dev->rdev, hwtid, skb);
1534 return;
1535}
1536
1537static void get_4tuple(struct cpl_pass_accept_req *req,
1538 __be32 *local_ip, __be32 *peer_ip,
1539 __be16 *local_port, __be16 *peer_port)
1540{
1541 int eth_len = G_ETH_HDR_LEN(be32_to_cpu(req->hdr_len));
1542 int ip_len = G_IP_HDR_LEN(be32_to_cpu(req->hdr_len));
1543 struct iphdr *ip = (struct iphdr *)((u8 *)(req + 1) + eth_len);
1544 struct tcphdr *tcp = (struct tcphdr *)
1545 ((u8 *)(req + 1) + eth_len + ip_len);
1546
1547 PDBG("%s saddr 0x%x daddr 0x%x sport %u dport %u\n", __func__,
1548 ntohl(ip->saddr), ntohl(ip->daddr), ntohs(tcp->source),
1549 ntohs(tcp->dest));
1550
1551 *peer_ip = ip->saddr;
1552 *local_ip = ip->daddr;
1553 *peer_port = tcp->source;
1554 *local_port = tcp->dest;
1555
1556 return;
1557}
1558
1559static int pass_accept_req(struct c4iw_dev *dev, struct sk_buff *skb)
1560{
1561 struct c4iw_ep *child_ep, *parent_ep;
1562 struct cpl_pass_accept_req *req = cplhdr(skb);
1563 unsigned int stid = GET_POPEN_TID(ntohl(req->tos_stid));
1564 struct tid_info *t = dev->rdev.lldi.tids;
1565 unsigned int hwtid = GET_TID(req);
69cce1d1 1566 struct neighbour *neigh;
cfdda9d7
SW		 1567 struct dst_entry *dst;
1568 struct l2t_entry *l2t;
1569 struct rtable *rt;
1570 __be32 local_ip, peer_ip;
1571 __be16 local_port, peer_port;
1572 struct net_device *pdev;
1573 u32 tx_chan, smac_idx;
1574 u16 rss_qid;
1575 u32 mtu;
1576 int step;
d4f1a5c6 1577 int txq_idx, ctrlq_idx;
cfdda9d7
SW		 1578
1579 parent_ep = lookup_stid(t, stid);
1580 PDBG("%s parent ep %p tid %u\n", __func__, parent_ep, hwtid);
1581
1582 get_4tuple(req, &local_ip, &peer_ip, &local_port, &peer_port);
1583
1584 if (state_read(&parent_ep->com) != LISTEN) {
1585 printk(KERN_ERR "%s - listening ep not in LISTEN\n",
1586 __func__);
1587 goto reject;
1588 }
1589
1590 /* Find output route */
1591 rt = find_route(dev, local_ip, peer_ip, local_port, peer_port,
1592 GET_POPEN_TOS(ntohl(req->tos_stid)));
1593 if (!rt) {
1594 printk(KERN_ERR MOD "%s - failed to find dst entry!\n",
1595 __func__);
1596 goto reject;
1597 }
d8d1f30b 1598 dst = &rt->dst;
580da35a 1599 rcu_read_lock();
69cce1d1
DM		 1600 neigh = dst_get_neighbour(dst);
1601 if (neigh->dev->flags & IFF_LOOPBACK) {
cfdda9d7
SW		 1602 pdev = ip_dev_find(&init_net, peer_ip);
1603 BUG_ON(!pdev);
69cce1d1 1604 l2t = cxgb4_l2t_get(dev->rdev.lldi.l2t, neigh, pdev, 0);
cfdda9d7
SW		 1605 mtu = pdev->mtu;
1606 tx_chan = cxgb4_port_chan(pdev);
2c5934bf 1607 smac_idx = (cxgb4_port_viid(pdev) & 0x7F) << 1;
cfdda9d7
SW		 1608 step = dev->rdev.lldi.ntxq / dev->rdev.lldi.nchan;
1609 txq_idx = cxgb4_port_idx(pdev) * step;
d4f1a5c6 1610 ctrlq_idx = cxgb4_port_idx(pdev);
cfdda9d7
SW		 1611 step = dev->rdev.lldi.nrxq / dev->rdev.lldi.nchan;
1612 rss_qid = dev->rdev.lldi.rxq_ids[cxgb4_port_idx(pdev) * step];
1613 dev_put(pdev);
1614 } else {
69cce1d1 1615 l2t = cxgb4_l2t_get(dev->rdev.lldi.l2t, neigh, neigh->dev, 0);
cfdda9d7 1616 mtu = dst_mtu(dst);
69cce1d1
DM		 1617 tx_chan = cxgb4_port_chan(neigh->dev);
1618 smac_idx = (cxgb4_port_viid(neigh->dev) & 0x7F) << 1;
cfdda9d7 1619 step = dev->rdev.lldi.ntxq / dev->rdev.lldi.nchan;
69cce1d1
DM		 1620 txq_idx = cxgb4_port_idx(neigh->dev) * step;
1621 ctrlq_idx = cxgb4_port_idx(neigh->dev);
cfdda9d7
SW		 1622 step = dev->rdev.lldi.nrxq / dev->rdev.lldi.nchan;
1623 rss_qid = dev->rdev.lldi.rxq_ids[
69cce1d1 1624 cxgb4_port_idx(neigh->dev) * step];
cfdda9d7 1625 }
580da35a 1626 rcu_read_unlock();
cfdda9d7
SW		 1627 if (!l2t) {
1628 printk(KERN_ERR MOD "%s - failed to allocate l2t entry!\n",
1629 __func__);
1630 dst_release(dst);
1631 goto reject;
1632 }
1633
1634 child_ep = alloc_ep(sizeof(*child_ep), GFP_KERNEL);
1635 if (!child_ep) {
1636 printk(KERN_ERR MOD "%s - failed to allocate ep entry!\n",
1637 __func__);
1638 cxgb4_l2t_release(l2t);
1639 dst_release(dst);
1640 goto reject;
1641 }
1642 state_set(&child_ep->com, CONNECTING);
1643 child_ep->com.dev = dev;
1644 child_ep->com.cm_id = NULL;
1645 child_ep->com.local_addr.sin_family = PF_INET;
1646 child_ep->com.local_addr.sin_port = local_port;
1647 child_ep->com.local_addr.sin_addr.s_addr = local_ip;
1648 child_ep->com.remote_addr.sin_family = PF_INET;
1649 child_ep->com.remote_addr.sin_port = peer_port;
1650 child_ep->com.remote_addr.sin_addr.s_addr = peer_ip;
1651 c4iw_get_ep(&parent_ep->com);
1652 child_ep->parent_ep = parent_ep;
1653 child_ep->tos = GET_POPEN_TOS(ntohl(req->tos_stid));
1654 child_ep->l2t = l2t;
1655 child_ep->dst = dst;
1656 child_ep->hwtid = hwtid;
1657 child_ep->tx_chan = tx_chan;
1658 child_ep->smac_idx = smac_idx;
1659 child_ep->rss_qid = rss_qid;
1660 child_ep->mtu = mtu;
1661 child_ep->txq_idx = txq_idx;
d4f1a5c6 1662 child_ep->ctrlq_idx = ctrlq_idx;
cfdda9d7
SW		 1663
1664 PDBG("%s tx_chan %u smac_idx %u rss_qid %u\n", __func__,
1665 tx_chan, smac_idx, rss_qid);
1666
1667 init_timer(&child_ep->timer);
1668 cxgb4_insert_tid(t, child_ep, hwtid);
1669 accept_cr(child_ep, peer_ip, skb, req);
1670 goto out;
1671reject:
1672 reject_cr(dev, hwtid, peer_ip, skb);
1673out:
1674 return 0;
1675}
1676
1677static int pass_establish(struct c4iw_dev *dev, struct sk_buff *skb)
1678{
1679 struct c4iw_ep *ep;
1680 struct cpl_pass_establish *req = cplhdr(skb);
1681 struct tid_info *t = dev->rdev.lldi.tids;
1682 unsigned int tid = GET_TID(req);
1683
1684 ep = lookup_tid(t, tid);
1685 PDBG("%s ep %p tid %u\n", __func__, ep, ep->hwtid);
1686 ep->snd_seq = be32_to_cpu(req->snd_isn);
1687 ep->rcv_seq = be32_to_cpu(req->rcv_isn);
1688
1689 set_emss(ep, ntohs(req->tcp_opt));
1690
1691 dst_confirm(ep->dst);
1692 state_set(&ep->com, MPA_REQ_WAIT);
1693 start_ep_timer(ep);
1694 send_flowc(ep, skb);
1695
1696 return 0;
1697}
1698
1699static int peer_close(struct c4iw_dev *dev, struct sk_buff *skb)
1700{
1701 struct cpl_peer_close *hdr = cplhdr(skb);
1702 struct c4iw_ep *ep;
1703 struct c4iw_qp_attributes attrs;
cfdda9d7
SW		 1704 int disconnect = 1;
1705 int release = 0;
cfdda9d7
SW		 1706 struct tid_info *t = dev->rdev.lldi.tids;
1707 unsigned int tid = GET_TID(hdr);
8da7e7a5 1708 int ret;
cfdda9d7
SW		 1709
1710 ep = lookup_tid(t, tid);
1711 PDBG("%s ep %p tid %u\n", __func__, ep, ep->hwtid);
1712 dst_confirm(ep->dst);
1713
2f5b48c3 1714 mutex_lock(&ep->com.mutex);
cfdda9d7
SW		 1715 switch (ep->com.state) {
1716 case MPA_REQ_WAIT:
1717 __state_set(&ep->com, CLOSING);
1718 break;
1719 case MPA_REQ_SENT:
1720 __state_set(&ep->com, CLOSING);
1721 connect_reply_upcall(ep, -ECONNRESET);
1722 break;
1723 case MPA_REQ_RCVD:
1724
1725 /*
1726 * We're gonna mark this puppy DEAD, but keep
1727 * the reference on it until the ULP accepts or
1728 * rejects the CR. Also wake up anyone waiting
1729 * in rdma connection migration (see c4iw_accept_cr()).
1730 */
1731 __state_set(&ep->com, CLOSING);
cfdda9d7 1732 PDBG("waking up ep %p tid %u\n", ep, ep->hwtid);
d9594d99 1733 c4iw_wake_up(&ep->com.wr_wait, -ECONNRESET);
cfdda9d7
SW		 1734 break;
1735 case MPA_REP_SENT:
1736 __state_set(&ep->com, CLOSING);
cfdda9d7 1737 PDBG("waking up ep %p tid %u\n", ep, ep->hwtid);
d9594d99 1738 c4iw_wake_up(&ep->com.wr_wait, -ECONNRESET);
cfdda9d7
SW		 1739 break;
1740 case FPDU_MODE:
ca5a2202 1741 start_ep_timer(ep);
cfdda9d7 1742 __state_set(&ep->com, CLOSING);
30c95c2d 1743 attrs.next_state = C4IW_QP_STATE_CLOSING;
8da7e7a5 1744 ret = c4iw_modify_qp(ep->com.qp->rhp, ep->com.qp,
30c95c2d 1745 C4IW_QP_ATTR_NEXT_STATE, &attrs, 1);
8da7e7a5
SW		 1746 if (ret != -ECONNRESET) {
1747 peer_close_upcall(ep);
1748 disconnect = 1;
1749 }
cfdda9d7
SW		 1750 break;
1751 case ABORTING:
1752 disconnect = 0;
1753 break;
1754 case CLOSING:
1755 __state_set(&ep->com, MORIBUND);
1756 disconnect = 0;
1757 break;
1758 case MORIBUND:
ca5a2202 1759 stop_ep_timer(ep);
cfdda9d7
SW		 1760 if (ep->com.cm_id && ep->com.qp) {
1761 attrs.next_state = C4IW_QP_STATE_IDLE;
1762 c4iw_modify_qp(ep->com.qp->rhp, ep->com.qp,
1763 C4IW_QP_ATTR_NEXT_STATE, &attrs, 1);
1764 }
1765 close_complete_upcall(ep);
1766 __state_set(&ep->com, DEAD);
1767 release = 1;
1768 disconnect = 0;
1769 break;
1770 case DEAD:
1771 disconnect = 0;
1772 break;
1773 default:
1774 BUG_ON(1);
1775 }
2f5b48c3 1776 mutex_unlock(&ep->com.mutex);
cfdda9d7
SW		 1777 if (disconnect)
1778 c4iw_ep_disconnect(ep, 0, GFP_KERNEL);
1779 if (release)
1780 release_ep_resources(ep);
1781 return 0;
1782}
1783
1784/*
1785 * Returns whether an ABORT_REQ_RSS message is a negative advice.
1786 */
1787static int is_neg_adv_abort(unsigned int status)
1788{
1789 return status == CPL_ERR_RTX_NEG_ADVICE ||
1790 status == CPL_ERR_PERSIST_NEG_ADVICE;
1791}
1792
d2fe99e8
KS		 1793static int c4iw_reconnect(struct c4iw_ep *ep)
1794{
1795 int err = 0;
1796 struct rtable *rt;
1797 struct net_device *pdev;
1798 struct neighbour *neigh;
1799 int step;
1800
1801 PDBG("%s qp %p cm_id %p\n", __func__, ep->com.qp, ep->com.cm_id);
1802 init_timer(&ep->timer);
1803
1804 /*
1805 * Allocate an active TID to initiate a TCP connection.
1806 */
1807 ep->atid = cxgb4_alloc_atid(ep->com.dev->rdev.lldi.tids, ep);
1808 if (ep->atid == -1) {
1809 printk(KERN_ERR MOD "%s - cannot alloc atid.\n", __func__);
1810 err = -ENOMEM;
1811 goto fail2;
1812 }
1813
1814 /* find a route */
1815 rt = find_route(ep->com.dev,
1816 ep->com.cm_id->local_addr.sin_addr.s_addr,
1817 ep->com.cm_id->remote_addr.sin_addr.s_addr,
1818 ep->com.cm_id->local_addr.sin_port,
1819 ep->com.cm_id->remote_addr.sin_port, 0);
1820 if (!rt) {
1821 printk(KERN_ERR MOD "%s - cannot find route.\n", __func__);
1822 err = -EHOSTUNREACH;
1823 goto fail3;
1824 }
1825 ep->dst = &rt->dst;
1826
580da35a 1827 rcu_read_lock();
d2fe99e8
KS		 1828 neigh = dst_get_neighbour(ep->dst);
1829
1830 /* get a l2t entry */
1831 if (neigh->dev->flags & IFF_LOOPBACK) {
1832 PDBG("%s LOOPBACK\n", __func__);
1833 pdev = ip_dev_find(&init_net,
1834 ep->com.cm_id->remote_addr.sin_addr.s_addr);
1835 ep->l2t = cxgb4_l2t_get(ep->com.dev->rdev.lldi.l2t,
1836 neigh, pdev, 0);
1837 ep->mtu = pdev->mtu;
1838 ep->tx_chan = cxgb4_port_chan(pdev);
1839 ep->smac_idx = (cxgb4_port_viid(pdev) & 0x7F) << 1;
1840 step = ep->com.dev->rdev.lldi.ntxq /
1841 ep->com.dev->rdev.lldi.nchan;
1842 ep->txq_idx = cxgb4_port_idx(pdev) * step;
1843 step = ep->com.dev->rdev.lldi.nrxq /
1844 ep->com.dev->rdev.lldi.nchan;
1845 ep->ctrlq_idx = cxgb4_port_idx(pdev);
1846 ep->rss_qid = ep->com.dev->rdev.lldi.rxq_ids[
1847 cxgb4_port_idx(pdev) * step];
1848 dev_put(pdev);
1849 } else {
1850 ep->l2t = cxgb4_l2t_get(ep->com.dev->rdev.lldi.l2t,
1851 neigh, neigh->dev, 0);
1852 ep->mtu = dst_mtu(ep->dst);
1853 ep->tx_chan = cxgb4_port_chan(neigh->dev);
1854 ep->smac_idx = (cxgb4_port_viid(neigh->dev) & 0x7F) << 1;
1855 step = ep->com.dev->rdev.lldi.ntxq /
1856 ep->com.dev->rdev.lldi.nchan;
1857 ep->txq_idx = cxgb4_port_idx(neigh->dev) * step;
1858 ep->ctrlq_idx = cxgb4_port_idx(neigh->dev);
1859 step = ep->com.dev->rdev.lldi.nrxq /
1860 ep->com.dev->rdev.lldi.nchan;
1861 ep->rss_qid = ep->com.dev->rdev.lldi.rxq_ids[
1862 cxgb4_port_idx(neigh->dev) * step];
1863 }
580da35a 1864 rcu_read_unlock();
d2fe99e8
KS		 1865 if (!ep->l2t) {
1866 printk(KERN_ERR MOD "%s - cannot alloc l2e.\n", __func__);
1867 err = -ENOMEM;
1868 goto fail4;
1869 }
1870
1871 PDBG("%s txq_idx %u tx_chan %u smac_idx %u rss_qid %u l2t_idx %u\n",
1872 __func__, ep->txq_idx, ep->tx_chan, ep->smac_idx, ep->rss_qid,
1873 ep->l2t->idx);
1874
1875 state_set(&ep->com, CONNECTING);
1876 ep->tos = 0;
1877
1878 /* send connect request to rnic */
1879 err = send_connect(ep);
1880 if (!err)
1881 goto out;
1882
1883 cxgb4_l2t_release(ep->l2t);
1884fail4:
1885 dst_release(ep->dst);
1886fail3:
1887 cxgb4_free_atid(ep->com.dev->rdev.lldi.tids, ep->atid);
1888fail2:
1889 /*
1890 * remember to send notification to upper layer.
1891 * We are in here so the upper layer is not aware that this is
1892 * re-connect attempt and so, upper layer is still waiting for
1893 * response of 1st connect request.
1894 */
1895 connect_reply_upcall(ep, -ECONNRESET);
1896 c4iw_put_ep(&ep->com);
1897out:
1898 return err;
1899}
1900
cfdda9d7
SW		 1901static int peer_abort(struct c4iw_dev *dev, struct sk_buff *skb)
1902{
1903 struct cpl_abort_req_rss *req = cplhdr(skb);
1904 struct c4iw_ep *ep;
1905 struct cpl_abort_rpl *rpl;
1906 struct sk_buff *rpl_skb;
1907 struct c4iw_qp_attributes attrs;
1908 int ret;
1909 int release = 0;
cfdda9d7
SW		 1910 struct tid_info *t = dev->rdev.lldi.tids;
1911 unsigned int tid = GET_TID(req);
cfdda9d7
SW		 1912
1913 ep = lookup_tid(t, tid);
1914 if (is_neg_adv_abort(req->status)) {
1915 PDBG("%s neg_adv_abort ep %p tid %u\n", __func__, ep,
1916 ep->hwtid);
1917 return 0;
1918 }
cfdda9d7
SW		 1919 PDBG("%s ep %p tid %u state %u\n", __func__, ep, ep->hwtid,
1920 ep->com.state);
2f5b48c3
SW		 1921
1922 /*
1923 * Wake up any threads in rdma_init() or rdma_fini().
d2fe99e8
KS		 1924 * However, this is not needed if com state is just
1925 * MPA_REQ_SENT
2f5b48c3 1926 */
d2fe99e8
KS		 1927 if (ep->com.state != MPA_REQ_SENT)
1928 c4iw_wake_up(&ep->com.wr_wait, -ECONNRESET);
2f5b48c3
SW		 1929
1930 mutex_lock(&ep->com.mutex);
cfdda9d7
SW		 1931 switch (ep->com.state) {
1932 case CONNECTING:
1933 break;
1934 case MPA_REQ_WAIT:
ca5a2202 1935 stop_ep_timer(ep);
cfdda9d7
SW		 1936 break;
1937 case MPA_REQ_SENT:
ca5a2202 1938 stop_ep_timer(ep);
d2fe99e8
KS		 1939 if (mpa_rev == 2 && ep->tried_with_mpa_v1)
1940 connect_reply_upcall(ep, -ECONNRESET);
1941 else {
1942 /*
1943 * we just don't send notification upwards because we
1944 * want to retry with mpa_v1 without upper layers even
1945 * knowing it.
1946 *
1947 * do some housekeeping so as to re-initiate the
1948 * connection
1949 */
1950 PDBG("%s: mpa_rev=%d. Retrying with mpav1\n", __func__,
1951 mpa_rev);
1952 ep->retry_with_mpa_v1 = 1;
1953 }
cfdda9d7
SW		 1954 break;
1955 case MPA_REP_SENT:
cfdda9d7
SW		 1956 break;
1957 case MPA_REQ_RCVD:
cfdda9d7
SW		 1958 break;
1959 case MORIBUND:
1960 case CLOSING:
ca5a2202 1961 stop_ep_timer(ep);
cfdda9d7
SW		 1962 /*FALLTHROUGH*/
1963 case FPDU_MODE:
1964 if (ep->com.cm_id && ep->com.qp) {
1965 attrs.next_state = C4IW_QP_STATE_ERROR;
1966 ret = c4iw_modify_qp(ep->com.qp->rhp,
1967 ep->com.qp, C4IW_QP_ATTR_NEXT_STATE,
1968 &attrs, 1);
1969 if (ret)
1970 printk(KERN_ERR MOD
1971 "%s - qp <- error failed!\n",
1972 __func__);
1973 }
1974 peer_abort_upcall(ep);
1975 break;
1976 case ABORTING:
1977 break;
1978 case DEAD:
1979 PDBG("%s PEER_ABORT IN DEAD STATE!!!!\n", __func__);
2f5b48c3 1980 mutex_unlock(&ep->com.mutex);
cfdda9d7
SW		 1981 return 0;
1982 default:
1983 BUG_ON(1);
1984 break;
1985 }
1986 dst_confirm(ep->dst);
1987 if (ep->com.state != ABORTING) {
1988 __state_set(&ep->com, DEAD);
d2fe99e8
KS		 1989 /* we don't release if we want to retry with mpa_v1 */
1990 if (!ep->retry_with_mpa_v1)
1991 release = 1;
cfdda9d7 1992 }
2f5b48c3 1993 mutex_unlock(&ep->com.mutex);
cfdda9d7
SW		 1994
1995 rpl_skb = get_skb(skb, sizeof(*rpl), GFP_KERNEL);
1996 if (!rpl_skb) {
1997 printk(KERN_ERR MOD "%s - cannot allocate skb!\n",
1998 __func__);
1999 release = 1;
2000 goto out;
2001 }
2002 set_wr_txq(skb, CPL_PRIORITY_DATA, ep->txq_idx);
2003 rpl = (struct cpl_abort_rpl *) skb_put(rpl_skb, sizeof(*rpl));
2004 INIT_TP_WR(rpl, ep->hwtid);
2005 OPCODE_TID(rpl) = cpu_to_be32(MK_OPCODE_TID(CPL_ABORT_RPL, ep->hwtid));
2006 rpl->cmd = CPL_ABORT_NO_RST;
2007 c4iw_ofld_send(&ep->com.dev->rdev, rpl_skb);
2008out:
cfdda9d7
SW		 2009 if (release)
2010 release_ep_resources(ep);
d2fe99e8
KS		 2011
2012 /* retry with mpa-v1 */
2013 if (ep && ep->retry_with_mpa_v1) {
2014 cxgb4_remove_tid(ep->com.dev->rdev.lldi.tids, 0, ep->hwtid);
2015 dst_release(ep->dst);
2016 cxgb4_l2t_release(ep->l2t);
2017 c4iw_reconnect(ep);
2018 }
2019
cfdda9d7
SW		 2020 return 0;
2021}
2022
2023static int close_con_rpl(struct c4iw_dev *dev, struct sk_buff *skb)
2024{
2025 struct c4iw_ep *ep;
2026 struct c4iw_qp_attributes attrs;
2027 struct cpl_close_con_rpl *rpl = cplhdr(skb);
cfdda9d7
SW		 2028 int release = 0;
2029 struct tid_info *t = dev->rdev.lldi.tids;
2030 unsigned int tid = GET_TID(rpl);
cfdda9d7
SW		 2031
2032 ep = lookup_tid(t, tid);
2033
2034 PDBG("%s ep %p tid %u\n", __func__, ep, ep->hwtid);
2035 BUG_ON(!ep);
2036
2037 /* The cm_id may be null if we failed to connect */
2f5b48c3 2038 mutex_lock(&ep->com.mutex);
cfdda9d7
SW		 2039 switch (ep->com.state) {
2040 case CLOSING:
2041 __state_set(&ep->com, MORIBUND);
2042 break;
2043 case MORIBUND:
ca5a2202 2044 stop_ep_timer(ep);
cfdda9d7
SW		 2045 if ((ep->com.cm_id) && (ep->com.qp)) {
2046 attrs.next_state = C4IW_QP_STATE_IDLE;
2047 c4iw_modify_qp(ep->com.qp->rhp,
2048 ep->com.qp,
2049 C4IW_QP_ATTR_NEXT_STATE,
2050 &attrs, 1);
2051 }
2052 close_complete_upcall(ep);
2053 __state_set(&ep->com, DEAD);
2054 release = 1;
2055 break;
2056 case ABORTING:
2057 case DEAD:
2058 break;
2059 default:
2060 BUG_ON(1);
2061 break;
2062 }
2f5b48c3 2063 mutex_unlock(&ep->com.mutex);
cfdda9d7
SW		 2064 if (release)
2065 release_ep_resources(ep);
2066 return 0;
2067}
2068
2069static int terminate(struct c4iw_dev *dev, struct sk_buff *skb)
2070{
0e42c1f4 2071 struct cpl_rdma_terminate *rpl = cplhdr(skb);
cfdda9d7 2072 struct tid_info *t = dev->rdev.lldi.tids;
0e42c1f4
SW		 2073 unsigned int tid = GET_TID(rpl);
2074 struct c4iw_ep *ep;
2075 struct c4iw_qp_attributes attrs;
cfdda9d7
SW		 2076
2077 ep = lookup_tid(t, tid);
0e42c1f4 2078 BUG_ON(!ep);
cfdda9d7 2079
30c95c2d 2080 if (ep && ep->com.qp) {
0e42c1f4
SW		 2081 printk(KERN_WARNING MOD "TERM received tid %u qpid %u\n", tid,
2082 ep->com.qp->wq.sq.qid);
2083 attrs.next_state = C4IW_QP_STATE_TERMINATE;
2084 c4iw_modify_qp(ep->com.qp->rhp, ep->com.qp,
2085 C4IW_QP_ATTR_NEXT_STATE, &attrs, 1);
2086 } else
30c95c2d 2087 printk(KERN_WARNING MOD "TERM received tid %u no ep/qp\n", tid);
cfdda9d7 2088
cfdda9d7
SW		 2089 return 0;
2090}
2091
2092/*
2093 * Upcall from the adapter indicating data has been transmitted.
2094 * For us its just the single MPA request or reply. We can now free
2095 * the skb holding the mpa message.
2096 */
2097static int fw4_ack(struct c4iw_dev *dev, struct sk_buff *skb)
2098{
2099 struct c4iw_ep *ep;
2100 struct cpl_fw4_ack *hdr = cplhdr(skb);
2101 u8 credits = hdr->credits;
2102 unsigned int tid = GET_TID(hdr);
2103 struct tid_info *t = dev->rdev.lldi.tids;
2104
2105
2106 ep = lookup_tid(t, tid);
2107 PDBG("%s ep %p tid %u credits %u\n", __func__, ep, ep->hwtid, credits);
2108 if (credits == 0) {
aa1ad260
JP		 2109 PDBG("%s 0 credit ack ep %p tid %u state %u\n",
2110 __func__, ep, ep->hwtid, state_read(&ep->com));
cfdda9d7
SW		 2111 return 0;
2112 }
2113
2114 dst_confirm(ep->dst);
2115 if (ep->mpa_skb) {
2116 PDBG("%s last streaming msg ack ep %p tid %u state %u "
2117 "initiator %u freeing skb\n", __func__, ep, ep->hwtid,
2118 state_read(&ep->com), ep->mpa_attr.initiator ? 1 : 0);
2119 kfree_skb(ep->mpa_skb);
2120 ep->mpa_skb = NULL;
2121 }
2122 return 0;
2123}
2124
cfdda9d7
SW		 2125int c4iw_reject_cr(struct iw_cm_id *cm_id, const void *pdata, u8 pdata_len)
2126{
2127 int err;
2128 struct c4iw_ep *ep = to_ep(cm_id);
2129 PDBG("%s ep %p tid %u\n", __func__, ep, ep->hwtid);
2130
2131 if (state_read(&ep->com) == DEAD) {
2132 c4iw_put_ep(&ep->com);
2133 return -ECONNRESET;
2134 }
2135 BUG_ON(state_read(&ep->com) != MPA_REQ_RCVD);
2136 if (mpa_rev == 0)
2137 abort_connection(ep, NULL, GFP_KERNEL);
2138 else {
2139 err = send_mpa_reject(ep, pdata, pdata_len);
2140 err = c4iw_ep_disconnect(ep, 0, GFP_KERNEL);
2141 }
2142 c4iw_put_ep(&ep->com);
2143 return 0;
2144}
2145
2146int c4iw_accept_cr(struct iw_cm_id *cm_id, struct iw_cm_conn_param *conn_param)
2147{
2148 int err;
2149 struct c4iw_qp_attributes attrs;
2150 enum c4iw_qp_attr_mask mask;
2151 struct c4iw_ep *ep = to_ep(cm_id);
2152 struct c4iw_dev *h = to_c4iw_dev(cm_id->device);
2153 struct c4iw_qp *qp = get_qhp(h, conn_param->qpn);
2154
2155 PDBG("%s ep %p tid %u\n", __func__, ep, ep->hwtid);
2156 if (state_read(&ep->com) == DEAD) {
2157 err = -ECONNRESET;
2158 goto err;
2159 }
2160
2161 BUG_ON(state_read(&ep->com) != MPA_REQ_RCVD);
2162 BUG_ON(!qp);
2163
be4c9bad
RD		 2164 if ((conn_param->ord > c4iw_max_read_depth) ||
2165 (conn_param->ird > c4iw_max_read_depth)) {
cfdda9d7
SW		 2166 abort_connection(ep, NULL, GFP_KERNEL);
2167 err = -EINVAL;
2168 goto err;
2169 }
2170
d2fe99e8
KS		 2171 if (ep->mpa_attr.version == 2 && ep->mpa_attr.enhanced_rdma_conn) {
2172 if (conn_param->ord > ep->ird) {
2173 ep->ird = conn_param->ird;
2174 ep->ord = conn_param->ord;
2175 send_mpa_reject(ep, conn_param->private_data,
2176 conn_param->private_data_len);
2177 abort_connection(ep, NULL, GFP_KERNEL);
2178 err = -ENOMEM;
2179 goto err;
2180 }
2181 if (conn_param->ird > ep->ord) {
2182 if (!ep->ord)
2183 conn_param->ird = 1;
2184 else {
2185 abort_connection(ep, NULL, GFP_KERNEL);
2186 err = -ENOMEM;
2187 goto err;
2188 }
2189 }
cfdda9d7 2190
d2fe99e8 2191 }
cfdda9d7
SW		 2192 ep->ird = conn_param->ird;
2193 ep->ord = conn_param->ord;
2194
d2fe99e8
KS		 2195 if (ep->mpa_attr.version != 2)
2196 if (peer2peer && ep->ird == 0)
2197 ep->ird = 1;
cfdda9d7
SW		 2198
2199 PDBG("%s %d ird %d ord %d\n", __func__, __LINE__, ep->ird, ep->ord);
2200
d2fe99e8
KS		 2201 cm_id->add_ref(cm_id);
2202 ep->com.cm_id = cm_id;
2203 ep->com.qp = qp;
2204
cfdda9d7
SW		 2205 /* bind QP to EP and move to RTS */
2206 attrs.mpa_attr = ep->mpa_attr;
2207 attrs.max_ird = ep->ird;
2208 attrs.max_ord = ep->ord;
2209 attrs.llp_stream_handle = ep;
2210 attrs.next_state = C4IW_QP_STATE_RTS;
2211
2212 /* bind QP and TID with INIT_WR */
2213 mask = C4IW_QP_ATTR_NEXT_STATE |
2214 C4IW_QP_ATTR_LLP_STREAM_HANDLE |
2215 C4IW_QP_ATTR_MPA_ATTR |
2216 C4IW_QP_ATTR_MAX_IRD |
2217 C4IW_QP_ATTR_MAX_ORD;
2218
2219 err = c4iw_modify_qp(ep->com.qp->rhp,
2220 ep->com.qp, mask, &attrs, 1);
2221 if (err)
2222 goto err1;
2223 err = send_mpa_reply(ep, conn_param->private_data,
2224 conn_param->private_data_len);
2225 if (err)
2226 goto err1;
2227
2228 state_set(&ep->com, FPDU_MODE);
2229 established_upcall(ep);
2230 c4iw_put_ep(&ep->com);
2231 return 0;
2232err1:
2233 ep->com.cm_id = NULL;
2234 ep->com.qp = NULL;
2235 cm_id->rem_ref(cm_id);
2236err:
2237 c4iw_put_ep(&ep->com);
2238 return err;
2239}
2240
2241int c4iw_connect(struct iw_cm_id *cm_id, struct iw_cm_conn_param *conn_param)
2242{
2243 int err = 0;
2244 struct c4iw_dev *dev = to_c4iw_dev(cm_id->device);
2245 struct c4iw_ep *ep;
2246 struct rtable *rt;
2247 struct net_device *pdev;
69cce1d1 2248 struct neighbour *neigh;
cfdda9d7
SW		 2249 int step;
2250
be4c9bad
RD		 2251 if ((conn_param->ord > c4iw_max_read_depth) ||
2252 (conn_param->ird > c4iw_max_read_depth)) {
2253 err = -EINVAL;
2254 goto out;
2255 }
cfdda9d7
SW		 2256 ep = alloc_ep(sizeof(*ep), GFP_KERNEL);
2257 if (!ep) {
2258 printk(KERN_ERR MOD "%s - cannot alloc ep.\n", __func__);
2259 err = -ENOMEM;
2260 goto out;
2261 }
2262 init_timer(&ep->timer);
2263 ep->plen = conn_param->private_data_len;
2264 if (ep->plen)
2265 memcpy(ep->mpa_pkt + sizeof(struct mpa_message),
2266 conn_param->private_data, ep->plen);
2267 ep->ird = conn_param->ird;
2268 ep->ord = conn_param->ord;
2269
2270 if (peer2peer && ep->ord == 0)
2271 ep->ord = 1;
2272
2273 cm_id->add_ref(cm_id);
2274 ep->com.dev = dev;
2275 ep->com.cm_id = cm_id;
2276 ep->com.qp = get_qhp(dev, conn_param->qpn);
2277 BUG_ON(!ep->com.qp);
2278 PDBG("%s qpn 0x%x qp %p cm_id %p\n", __func__, conn_param->qpn,
2279 ep->com.qp, cm_id);
2280
2281 /*
2282 * Allocate an active TID to initiate a TCP connection.
2283 */
2284 ep->atid = cxgb4_alloc_atid(dev->rdev.lldi.tids, ep);
2285 if (ep->atid == -1) {
2286 printk(KERN_ERR MOD "%s - cannot alloc atid.\n", __func__);
2287 err = -ENOMEM;
2288 goto fail2;
2289 }
2290
2291 PDBG("%s saddr 0x%x sport 0x%x raddr 0x%x rport 0x%x\n", __func__,
2292 ntohl(cm_id->local_addr.sin_addr.s_addr),
2293 ntohs(cm_id->local_addr.sin_port),
2294 ntohl(cm_id->remote_addr.sin_addr.s_addr),
2295 ntohs(cm_id->remote_addr.sin_port));
2296
2297 /* find a route */
2298 rt = find_route(dev,
2299 cm_id->local_addr.sin_addr.s_addr,
2300 cm_id->remote_addr.sin_addr.s_addr,
2301 cm_id->local_addr.sin_port,
2302 cm_id->remote_addr.sin_port, 0);
2303 if (!rt) {
2304 printk(KERN_ERR MOD "%s - cannot find route.\n", __func__);
2305 err = -EHOSTUNREACH;
2306 goto fail3;
2307 }
d8d1f30b 2308 ep->dst = &rt->dst;
cfdda9d7 2309
580da35a 2310 rcu_read_lock();
69cce1d1
DM		 2311 neigh = dst_get_neighbour(ep->dst);
2312
cfdda9d7 2313 /* get a l2t entry */
69cce1d1 2314 if (neigh->dev->flags & IFF_LOOPBACK) {
cfdda9d7
SW		 2315 PDBG("%s LOOPBACK\n", __func__);
2316 pdev = ip_dev_find(&init_net,
2317 cm_id->remote_addr.sin_addr.s_addr);
2318 ep->l2t = cxgb4_l2t_get(ep->com.dev->rdev.lldi.l2t,
69cce1d1 2319 neigh, pdev, 0);
cfdda9d7
SW		 2320 ep->mtu = pdev->mtu;
2321 ep->tx_chan = cxgb4_port_chan(pdev);
2c5934bf 2322 ep->smac_idx = (cxgb4_port_viid(pdev) & 0x7F) << 1;
cfdda9d7
SW		 2323 step = ep->com.dev->rdev.lldi.ntxq /
2324 ep->com.dev->rdev.lldi.nchan;
2325 ep->txq_idx = cxgb4_port_idx(pdev) * step;
2326 step = ep->com.dev->rdev.lldi.nrxq /
2327 ep->com.dev->rdev.lldi.nchan;
d4f1a5c6 2328 ep->ctrlq_idx = cxgb4_port_idx(pdev);
cfdda9d7
SW		 2329 ep->rss_qid = ep->com.dev->rdev.lldi.rxq_ids[
2330 cxgb4_port_idx(pdev) * step];
2331 dev_put(pdev);
2332 } else {
2333 ep->l2t = cxgb4_l2t_get(ep->com.dev->rdev.lldi.l2t,
69cce1d1 2334 neigh, neigh->dev, 0);
cfdda9d7 2335 ep->mtu = dst_mtu(ep->dst);
69cce1d1
DM		 2336 ep->tx_chan = cxgb4_port_chan(neigh->dev);
2337 ep->smac_idx = (cxgb4_port_viid(neigh->dev) & 0x7F) << 1;
cfdda9d7
SW		 2338 step = ep->com.dev->rdev.lldi.ntxq /
2339 ep->com.dev->rdev.lldi.nchan;
69cce1d1
DM		 2340 ep->txq_idx = cxgb4_port_idx(neigh->dev) * step;
2341 ep->ctrlq_idx = cxgb4_port_idx(neigh->dev);
cfdda9d7
SW		 2342 step = ep->com.dev->rdev.lldi.nrxq /
2343 ep->com.dev->rdev.lldi.nchan;
2344 ep->rss_qid = ep->com.dev->rdev.lldi.rxq_ids[
69cce1d1 2345 cxgb4_port_idx(neigh->dev) * step];
d2fe99e8
KS		 2346 ep->retry_with_mpa_v1 = 0;
2347 ep->tried_with_mpa_v1 = 0;
cfdda9d7 2348 }
580da35a 2349 rcu_read_unlock();
cfdda9d7
SW		 2350 if (!ep->l2t) {
2351 printk(KERN_ERR MOD "%s - cannot alloc l2e.\n", __func__);
2352 err = -ENOMEM;
2353 goto fail4;
2354 }
2355
2356 PDBG("%s txq_idx %u tx_chan %u smac_idx %u rss_qid %u l2t_idx %u\n",
2357 __func__, ep->txq_idx, ep->tx_chan, ep->smac_idx, ep->rss_qid,
2358 ep->l2t->idx);
2359
2360 state_set(&ep->com, CONNECTING);
2361 ep->tos = 0;
2362 ep->com.local_addr = cm_id->local_addr;
2363 ep->com.remote_addr = cm_id->remote_addr;
2364
2365 /* send connect request to rnic */
2366 err = send_connect(ep);
2367 if (!err)
2368 goto out;
2369
2370 cxgb4_l2t_release(ep->l2t);
2371fail4:
2372 dst_release(ep->dst);
2373fail3:
2374 cxgb4_free_atid(ep->com.dev->rdev.lldi.tids, ep->atid);
2375fail2:
2376 cm_id->rem_ref(cm_id);
2377 c4iw_put_ep(&ep->com);
2378out:
2379 return err;
2380}
2381
2382int c4iw_create_listen(struct iw_cm_id *cm_id, int backlog)
2383{
2384 int err = 0;
2385 struct c4iw_dev *dev = to_c4iw_dev(cm_id->device);
2386 struct c4iw_listen_ep *ep;
2387
2388
2389 might_sleep();
2390
2391 ep = alloc_ep(sizeof(*ep), GFP_KERNEL);
2392 if (!ep) {
2393 printk(KERN_ERR MOD "%s - cannot alloc ep.\n", __func__);
2394 err = -ENOMEM;
2395 goto fail1;
2396 }
2397 PDBG("%s ep %p\n", __func__, ep);
2398 cm_id->add_ref(cm_id);
2399 ep->com.cm_id = cm_id;
2400 ep->com.dev = dev;
2401 ep->backlog = backlog;
2402 ep->com.local_addr = cm_id->local_addr;
2403
2404 /*
2405 * Allocate a server TID.
2406 */
2407 ep->stid = cxgb4_alloc_stid(dev->rdev.lldi.tids, PF_INET, ep);
2408 if (ep->stid == -1) {
be4c9bad 2409 printk(KERN_ERR MOD "%s - cannot alloc stid.\n", __func__);
cfdda9d7
SW		 2410 err = -ENOMEM;
2411 goto fail2;
2412 }
2413
2414 state_set(&ep->com, LISTEN);
aadc4df3 2415 c4iw_init_wr_wait(&ep->com.wr_wait);
cfdda9d7
SW		 2416 err = cxgb4_create_server(ep->com.dev->rdev.lldi.ports[0], ep->stid,
2417 ep->com.local_addr.sin_addr.s_addr,
2418 ep->com.local_addr.sin_port,
2419 ep->com.dev->rdev.lldi.rxq_ids[0]);
2420 if (err)
2421 goto fail3;
2422
2423 /* wait for pass_open_rpl */
aadc4df3
SW		 2424 err = c4iw_wait_for_reply(&ep->com.dev->rdev, &ep->com.wr_wait, 0, 0,
2425 __func__);
cfdda9d7
SW		 2426 if (!err) {
2427 cm_id->provider_data = ep;
2428 goto out;
2429 }
2430fail3:
2431 cxgb4_free_stid(ep->com.dev->rdev.lldi.tids, ep->stid, PF_INET);
2432fail2:
2433 cm_id->rem_ref(cm_id);
2434 c4iw_put_ep(&ep->com);
2435fail1:
2436out:
2437 return err;
2438}
2439
2440int c4iw_destroy_listen(struct iw_cm_id *cm_id)
2441{
2442 int err;
2443 struct c4iw_listen_ep *ep = to_listen_ep(cm_id);
2444
2445 PDBG("%s ep %p\n", __func__, ep);
2446
2447 might_sleep();
2448 state_set(&ep->com, DEAD);
aadc4df3 2449 c4iw_init_wr_wait(&ep->com.wr_wait);
cfdda9d7
SW		 2450 err = listen_stop(ep);
2451 if (err)
2452 goto done;
aadc4df3
SW		 2453 err = c4iw_wait_for_reply(&ep->com.dev->rdev, &ep->com.wr_wait, 0, 0,
2454 __func__);
cfdda9d7
SW		 2455 cxgb4_free_stid(ep->com.dev->rdev.lldi.tids, ep->stid, PF_INET);
2456done:
cfdda9d7
SW		 2457 cm_id->rem_ref(cm_id);
2458 c4iw_put_ep(&ep->com);
2459 return err;
2460}
2461
2462int c4iw_ep_disconnect(struct c4iw_ep *ep, int abrupt, gfp_t gfp)
2463{
2464 int ret = 0;
cfdda9d7
SW		 2465 int close = 0;
2466 int fatal = 0;
2467 struct c4iw_rdev *rdev;
cfdda9d7 2468
2f5b48c3 2469 mutex_lock(&ep->com.mutex);
cfdda9d7
SW		 2470
2471 PDBG("%s ep %p state %s, abrupt %d\n", __func__, ep,
2472 states[ep->com.state], abrupt);
2473
2474 rdev = &ep->com.dev->rdev;
2475 if (c4iw_fatal_error(rdev)) {
2476 fatal = 1;
2477 close_complete_upcall(ep);
2478 ep->com.state = DEAD;
2479 }
2480 switch (ep->com.state) {
2481 case MPA_REQ_WAIT:
2482 case MPA_REQ_SENT:
2483 case MPA_REQ_RCVD:
2484 case MPA_REP_SENT:
2485 case FPDU_MODE:
2486 close = 1;
2487 if (abrupt)
2488 ep->com.state = ABORTING;
2489 else {
2490 ep->com.state = CLOSING;
ca5a2202 2491 start_ep_timer(ep);
cfdda9d7
SW		 2492 }
2493 set_bit(CLOSE_SENT, &ep->com.flags);
2494 break;
2495 case CLOSING:
2496 if (!test_and_set_bit(CLOSE_SENT, &ep->com.flags)) {
2497 close = 1;
2498 if (abrupt) {
ca5a2202 2499 stop_ep_timer(ep);
cfdda9d7
SW		 2500 ep->com.state = ABORTING;
2501 } else
2502 ep->com.state = MORIBUND;
2503 }
2504 break;
2505 case MORIBUND:
2506 case ABORTING:
2507 case DEAD:
2508 PDBG("%s ignoring disconnect ep %p state %u\n",
2509 __func__, ep, ep->com.state);
2510 break;
2511 default:
2512 BUG();
2513 break;
2514 }
2515
cfdda9d7 2516 if (close) {
8da7e7a5
SW		 2517 if (abrupt) {
2518 close_complete_upcall(ep);
2519 ret = send_abort(ep, NULL, gfp);
2520 } else
cfdda9d7
SW		 2521 ret = send_halfclose(ep, gfp);
2522 if (ret)
2523 fatal = 1;
2524 }
8da7e7a5 2525 mutex_unlock(&ep->com.mutex);
cfdda9d7
SW		 2526 if (fatal)
2527 release_ep_resources(ep);
2528 return ret;
2529}
2530
2f5b48c3
SW		 2531static int async_event(struct c4iw_dev *dev, struct sk_buff *skb)
2532{
2533 struct cpl_fw6_msg *rpl = cplhdr(skb);
2534 c4iw_ev_dispatch(dev, (struct t4_cqe *)&rpl->data[0]);
2535 return 0;
2536}
2537
be4c9bad
RD		 2538/*
2539 * These are the real handlers that are called from a
2540 * work queue.
2541 */
2542static c4iw_handler_func work_handlers[NUM_CPL_CMDS] = {
2543 [CPL_ACT_ESTABLISH] = act_establish,
2544 [CPL_ACT_OPEN_RPL] = act_open_rpl,
2545 [CPL_RX_DATA] = rx_data,
2546 [CPL_ABORT_RPL_RSS] = abort_rpl,
2547 [CPL_ABORT_RPL] = abort_rpl,
2548 [CPL_PASS_OPEN_RPL] = pass_open_rpl,
2549 [CPL_CLOSE_LISTSRV_RPL] = close_listsrv_rpl,
2550 [CPL_PASS_ACCEPT_REQ] = pass_accept_req,
2551 [CPL_PASS_ESTABLISH] = pass_establish,
2552 [CPL_PEER_CLOSE] = peer_close,
2553 [CPL_ABORT_REQ_RSS] = peer_abort,
2554 [CPL_CLOSE_CON_RPL] = close_con_rpl,
2555 [CPL_RDMA_TERMINATE] = terminate,
2f5b48c3
SW		 2556 [CPL_FW4_ACK] = fw4_ack,
2557 [CPL_FW6_MSG] = async_event
be4c9bad
RD		 2558};
2559
2560static void process_timeout(struct c4iw_ep *ep)
2561{
2562 struct c4iw_qp_attributes attrs;
2563 int abort = 1;
2564
2f5b48c3 2565 mutex_lock(&ep->com.mutex);
be4c9bad
RD		 2566 PDBG("%s ep %p tid %u state %d\n", __func__, ep, ep->hwtid,
2567 ep->com.state);
2568 switch (ep->com.state) {
2569 case MPA_REQ_SENT:
2570 __state_set(&ep->com, ABORTING);
2571 connect_reply_upcall(ep, -ETIMEDOUT);
2572 break;
2573 case MPA_REQ_WAIT:
2574 __state_set(&ep->com, ABORTING);
2575 break;
2576 case CLOSING:
2577 case MORIBUND:
2578 if (ep->com.cm_id && ep->com.qp) {
2579 attrs.next_state = C4IW_QP_STATE_ERROR;
2580 c4iw_modify_qp(ep->com.qp->rhp,
2581 ep->com.qp, C4IW_QP_ATTR_NEXT_STATE,
2582 &attrs, 1);
2583 }
2584 __state_set(&ep->com, ABORTING);
2585 break;
2586 default:
2587 printk(KERN_ERR "%s unexpected state ep %p tid %u state %u\n",
2588 __func__, ep, ep->hwtid, ep->com.state);
2589 WARN_ON(1);
2590 abort = 0;
2591 }
2f5b48c3 2592 mutex_unlock(&ep->com.mutex);
be4c9bad
RD		 2593 if (abort)
2594 abort_connection(ep, NULL, GFP_KERNEL);
2595 c4iw_put_ep(&ep->com);
2596}
2597
2598static void process_timedout_eps(void)
2599{
2600 struct c4iw_ep *ep;
2601
2602 spin_lock_irq(&timeout_lock);
2603 while (!list_empty(&timeout_list)) {
2604 struct list_head *tmp;
2605
2606 tmp = timeout_list.next;
2607 list_del(tmp);
2608 spin_unlock_irq(&timeout_lock);
2609 ep = list_entry(tmp, struct c4iw_ep, entry);
2610 process_timeout(ep);
2611 spin_lock_irq(&timeout_lock);
2612 }
2613 spin_unlock_irq(&timeout_lock);
2614}
2615
2616static void process_work(struct work_struct *work)
2617{
2618 struct sk_buff *skb = NULL;
2619 struct c4iw_dev *dev;
c1d7356c 2620 struct cpl_act_establish *rpl;
be4c9bad
RD		 2621 unsigned int opcode;
2622 int ret;
2623
2624 while ((skb = skb_dequeue(&rxq))) {
2625 rpl = cplhdr(skb);
2626 dev = *((struct c4iw_dev **) (skb->cb + sizeof(void *)));
2627 opcode = rpl->ot.opcode;
2628
2629 BUG_ON(!work_handlers[opcode]);
2630 ret = work_handlers[opcode](dev, skb);
2631 if (!ret)
2632 kfree_skb(skb);
2633 }
2634 process_timedout_eps();
2635}
2636
2637static DECLARE_WORK(skb_work, process_work);
2638
2639static void ep_timeout(unsigned long arg)
2640{
2641 struct c4iw_ep *ep = (struct c4iw_ep *)arg;
2642
2643 spin_lock(&timeout_lock);
2644 list_add_tail(&ep->entry, &timeout_list);
2645 spin_unlock(&timeout_lock);
2646 queue_work(workq, &skb_work);
2647}
2648
cfdda9d7
SW		 2649/*
2650 * All the CM events are handled on a work queue to have a safe context.
2651 */
2652static int sched(struct c4iw_dev *dev, struct sk_buff *skb)
2653{
2654
2655 /*
2656 * Save dev in the skb->cb area.
2657 */
2658 *((struct c4iw_dev **) (skb->cb + sizeof(void *))) = dev;
2659
2660 /*
2661 * Queue the skb and schedule the worker thread.
2662 */
2663 skb_queue_tail(&rxq, skb);
2664 queue_work(workq, &skb_work);
2665 return 0;
2666}
2667
2668static int set_tcb_rpl(struct c4iw_dev *dev, struct sk_buff *skb)
2669{
2670 struct cpl_set_tcb_rpl *rpl = cplhdr(skb);
2671
2672 if (rpl->status != CPL_ERR_NONE) {
2673 printk(KERN_ERR MOD "Unexpected SET_TCB_RPL status %u "
2674 "for tid %u\n", rpl->status, GET_TID(rpl));
2675 }
2f5b48c3 2676 kfree_skb(skb);
cfdda9d7
SW		 2677 return 0;
2678}
2679
be4c9bad
RD		 2680static int fw6_msg(struct c4iw_dev *dev, struct sk_buff *skb)
2681{
2682 struct cpl_fw6_msg *rpl = cplhdr(skb);
2683 struct c4iw_wr_wait *wr_waitp;
2684 int ret;
2685
2686 PDBG("%s type %u\n", __func__, rpl->type);
2687
2688 switch (rpl->type) {
2689 case 1:
2690 ret = (int)((be64_to_cpu(rpl->data[0]) >> 8) & 0xff);
c8e081a1 2691 wr_waitp = (struct c4iw_wr_wait *)(__force unsigned long) rpl->data[1];
be4c9bad 2692 PDBG("%s wr_waitp %p ret %u\n", __func__, wr_waitp, ret);
d9594d99
SW		 2693 if (wr_waitp)
2694 c4iw_wake_up(wr_waitp, ret ? -ret : 0);
2f5b48c3 2695 kfree_skb(skb);
be4c9bad
RD		 2696 break;
2697 case 2:
2f5b48c3 2698 sched(dev, skb);
be4c9bad
RD		 2699 break;
2700 default:
2701 printk(KERN_ERR MOD "%s unexpected fw6 msg type %u\n", __func__,
2702 rpl->type);
2f5b48c3 2703 kfree_skb(skb);
be4c9bad
RD		 2704 break;
2705 }
2706 return 0;
2707}
2708
8da7e7a5
SW		 2709static int peer_abort_intr(struct c4iw_dev *dev, struct sk_buff *skb)
2710{
2711 struct cpl_abort_req_rss *req = cplhdr(skb);
2712 struct c4iw_ep *ep;
2713 struct tid_info *t = dev->rdev.lldi.tids;
2714 unsigned int tid = GET_TID(req);
2715
2716 ep = lookup_tid(t, tid);
2717 if (is_neg_adv_abort(req->status)) {
2718 PDBG("%s neg_adv_abort ep %p tid %u\n", __func__, ep,
2719 ep->hwtid);
2720 kfree_skb(skb);
2721 return 0;
2722 }
2723 PDBG("%s ep %p tid %u state %u\n", __func__, ep, ep->hwtid,
2724 ep->com.state);
2725
2726 /*
2727 * Wake up any threads in rdma_init() or rdma_fini().
d2fe99e8
KS		 2728 * However, this is not needed if com state is just
2729 * MPA_REQ_SENT
8da7e7a5 2730 */
d2fe99e8
KS		 2731 if (ep->com.state != MPA_REQ_SENT)
2732 c4iw_wake_up(&ep->com.wr_wait, -ECONNRESET);
8da7e7a5
SW		 2733 sched(dev, skb);
2734 return 0;
2735}
2736
be4c9bad
RD		 2737/*
2738 * Most upcalls from the T4 Core go to sched() to
2739 * schedule the processing on a work queue.
2740 */
2741c4iw_handler_func c4iw_handlers[NUM_CPL_CMDS] = {
2742 [CPL_ACT_ESTABLISH] = sched,
2743 [CPL_ACT_OPEN_RPL] = sched,
2744 [CPL_RX_DATA] = sched,
2745 [CPL_ABORT_RPL_RSS] = sched,
2746 [CPL_ABORT_RPL] = sched,
2747 [CPL_PASS_OPEN_RPL] = sched,
2748 [CPL_CLOSE_LISTSRV_RPL] = sched,
2749 [CPL_PASS_ACCEPT_REQ] = sched,
2750 [CPL_PASS_ESTABLISH] = sched,
2751 [CPL_PEER_CLOSE] = sched,
2752 [CPL_CLOSE_CON_RPL] = sched,
8da7e7a5 2753 [CPL_ABORT_REQ_RSS] = peer_abort_intr,
be4c9bad
RD		 2754 [CPL_RDMA_TERMINATE] = sched,
2755 [CPL_FW4_ACK] = sched,
2756 [CPL_SET_TCB_RPL] = set_tcb_rpl,
2757 [CPL_FW6_MSG] = fw6_msg
2758};
2759
cfdda9d7
SW		 2760int __init c4iw_cm_init(void)
2761{
be4c9bad 2762 spin_lock_init(&timeout_lock);
cfdda9d7
SW		 2763 skb_queue_head_init(&rxq);
2764
2765 workq = create_singlethread_workqueue("iw_cxgb4");
2766 if (!workq)
2767 return -ENOMEM;
2768
cfdda9d7
SW		 2769 return 0;
2770}
2771
2772void __exit c4iw_cm_term(void)
2773{
be4c9bad 2774 WARN_ON(!list_empty(&timeout_list));
cfdda9d7
SW		 2775 flush_workqueue(workq);
2776 destroy_workqueue(workq);
2777}
kernel source for telekom puls (alcatel/mediatek)