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UBUNTU: Ubuntu-5.15.0-39.42
[mirror_ubuntu-jammy-kernel.git] / drivers / infiniband / hw / cxgb4 / cm.c
CommitLineData
cfdda9d7 1/*
9eccfe10 2 * Copyright (c) 2009-2014 Chelsio, Inc. All rights reserved.
cfdda9d7
SW		 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>
1cab775c 41#include <linux/if_vlan.h>
cfdda9d7
SW		 42
43#include <net/neighbour.h>
44#include <net/netevent.h>
45#include <net/route.h>
1cab775c 46#include <net/tcp.h>
830662f6
VP		 47#include <net/ip6_route.h>
48#include <net/addrconf.h>
cfdda9d7 49
11b8e22d
SW		 50#include <rdma/ib_addr.h>
51
85e42b04 52#include <libcxgb_cm.h>
cfdda9d7 53#include "iw_cxgb4.h"
84cc6ac6 54#include "clip_tbl.h"
cfdda9d7
SW		 55
56static char *states[] = {
57 "idle",
58 "listen",
59 "connecting",
60 "mpa_wait_req",
61 "mpa_req_sent",
62 "mpa_req_rcvd",
63 "mpa_rep_sent",
64 "fpdu_mode",
65 "aborting",
66 "closing",
67 "moribund",
68 "dead",
69 NULL,
70};
71
5be78ee9
VP		 72static int nocong;
73module_param(nocong, int, 0644);
74MODULE_PARM_DESC(nocong, "Turn of congestion control (default=0)");
75
76static int enable_ecn;
77module_param(enable_ecn, int, 0644);
78MODULE_PARM_DESC(enable_ecn, "Enable ECN (default=0/disabled)");
79
8d539c61 80static int dack_mode;
ba6d3925 81module_param(dack_mode, int, 0644);
8d539c61 82MODULE_PARM_DESC(dack_mode, "Delayed ack mode (default=0)");
ba6d3925 83
4c2c5763 84uint c4iw_max_read_depth = 32;
be4c9bad 85module_param(c4iw_max_read_depth, int, 0644);
4c2c5763
HS		 86MODULE_PARM_DESC(c4iw_max_read_depth,
87 "Per-connection max ORD/IRD (default=32)");
be4c9bad 88
cfdda9d7
SW		 89static int enable_tcp_timestamps;
90module_param(enable_tcp_timestamps, int, 0644);
91MODULE_PARM_DESC(enable_tcp_timestamps, "Enable tcp timestamps (default=0)");
92
93static int enable_tcp_sack;
94module_param(enable_tcp_sack, int, 0644);
95MODULE_PARM_DESC(enable_tcp_sack, "Enable tcp SACK (default=0)");
96
97static int enable_tcp_window_scaling = 1;
98module_param(enable_tcp_window_scaling, int, 0644);
99MODULE_PARM_DESC(enable_tcp_window_scaling,
100 "Enable tcp window scaling (default=1)");
101
df2d5130 102static int peer2peer = 1;
cfdda9d7 103module_param(peer2peer, int, 0644);
df2d5130 104MODULE_PARM_DESC(peer2peer, "Support peer2peer ULPs (default=1)");
cfdda9d7
SW		 105
106static int p2p_type = FW_RI_INIT_P2PTYPE_READ_REQ;
107module_param(p2p_type, int, 0644);
108MODULE_PARM_DESC(p2p_type, "RDMAP opcode to use for the RTR message: "
109 "1=RDMA_READ 0=RDMA_WRITE (default 1)");
110
111static int ep_timeout_secs = 60;
112module_param(ep_timeout_secs, int, 0644);
113MODULE_PARM_DESC(ep_timeout_secs, "CM Endpoint operation timeout "
114 "in seconds (default=60)");
115
b8ac3112 116static int mpa_rev = 2;
cfdda9d7
SW		 117module_param(mpa_rev, int, 0644);
118MODULE_PARM_DESC(mpa_rev, "MPA Revision, 0 supports amso1100, "
ccd2c30b 119 "1 is RFC5044 spec compliant, 2 is IETF MPA Peer Connect Draft"
b8ac3112 120 " compliant (default=2)");
cfdda9d7
SW		 121
122static int markers_enabled;
123module_param(markers_enabled, int, 0644);
124MODULE_PARM_DESC(markers_enabled, "Enable MPA MARKERS (default(0)=disabled)");
125
126static int crc_enabled = 1;
127module_param(crc_enabled, int, 0644);
128MODULE_PARM_DESC(crc_enabled, "Enable MPA CRC (default(1)=enabled)");
129
130static int rcv_win = 256 * 1024;
131module_param(rcv_win, int, 0644);
132MODULE_PARM_DESC(rcv_win, "TCP receive window in bytes (default=256KB)");
133
98ae68b7 134static int snd_win = 128 * 1024;
cfdda9d7 135module_param(snd_win, int, 0644);
98ae68b7 136MODULE_PARM_DESC(snd_win, "TCP send window in bytes (default=128KB)");
cfdda9d7 137
cfdda9d7 138static struct workqueue_struct *workq;
cfdda9d7
SW		 139
140static struct sk_buff_head rxq;
cfdda9d7
SW		 141
142static struct sk_buff *get_skb(struct sk_buff *skb, int len, gfp_t gfp);
a9346abe 143static void ep_timeout(struct timer_list *t);
cfdda9d7 144static void connect_reply_upcall(struct c4iw_ep *ep, int status);
9dec900c 145static int sched(struct c4iw_dev *dev, struct sk_buff *skb);
cfdda9d7 146
be4c9bad 147static LIST_HEAD(timeout_list);
2e919a32 148static DEFINE_SPINLOCK(timeout_lock);
be4c9bad 149
9ca6f7cf
H		 150static void deref_cm_id(struct c4iw_ep_common *epc)
151{
152 epc->cm_id->rem_ref(epc->cm_id);
153 epc->cm_id = NULL;
154 set_bit(CM_ID_DEREFED, &epc->history);
155}
156
157static void ref_cm_id(struct c4iw_ep_common *epc)
158{
159 set_bit(CM_ID_REFED, &epc->history);
160 epc->cm_id->add_ref(epc->cm_id);
161}
162
325abead
VP		 163static void deref_qp(struct c4iw_ep *ep)
164{
165 c4iw_qp_rem_ref(&ep->com.qp->ibqp);
166 clear_bit(QP_REFERENCED, &ep->com.flags);
9ca6f7cf 167 set_bit(QP_DEREFED, &ep->com.history);
325abead
VP		 168}
169
170static void ref_qp(struct c4iw_ep *ep)
171{
172 set_bit(QP_REFERENCED, &ep->com.flags);
9ca6f7cf 173 set_bit(QP_REFED, &ep->com.history);
325abead
VP		 174 c4iw_qp_add_ref(&ep->com.qp->ibqp);
175}
176
cfdda9d7
SW		 177static void start_ep_timer(struct c4iw_ep *ep)
178{
548ddb19 179 pr_debug("ep %p\n", ep);
cfdda9d7 180 if (timer_pending(&ep->timer)) {
1ec779cc
VP		 181 pr_err("%s timer already started! ep %p\n",
182 __func__, ep);
183 return;
184 }
185 clear_bit(TIMEOUT, &ep->com.flags);
186 c4iw_get_ep(&ep->com);
cfdda9d7 187 ep->timer.expires = jiffies + ep_timeout_secs * HZ;
cfdda9d7
SW		 188 add_timer(&ep->timer);
189}
190
b33bd0cb 191static int stop_ep_timer(struct c4iw_ep *ep)
cfdda9d7 192{
548ddb19 193 pr_debug("ep %p stopping\n", ep);
cfdda9d7 194 del_timer_sync(&ep->timer);
b33bd0cb 195 if (!test_and_set_bit(TIMEOUT, &ep->com.flags)) {
1ec779cc 196 c4iw_put_ep(&ep->com);
b33bd0cb
SW		 197 return 0;
198 }
199 return 1;
cfdda9d7
SW		 200}
201
202static int c4iw_l2t_send(struct c4iw_rdev *rdev, struct sk_buff *skb,
203 struct l2t_entry *l2e)
204{
205 int error = 0;
206
207 if (c4iw_fatal_error(rdev)) {
208 kfree_skb(skb);
4d45b757 209 pr_err("%s - device in error state - dropping\n", __func__);
cfdda9d7
SW		 210 return -EIO;
211 }
212 error = cxgb4_l2t_send(rdev->lldi.ports[0], skb, l2e);
213 if (error < 0)
214 kfree_skb(skb);
caa6c9f2
H		 215 else if (error == NET_XMIT_DROP)
216 return -ENOMEM;
74594861 217 return error < 0 ? error : 0;
cfdda9d7
SW		 218}
219
220int c4iw_ofld_send(struct c4iw_rdev *rdev, struct sk_buff *skb)
221{
222 int error = 0;
223
224 if (c4iw_fatal_error(rdev)) {
225 kfree_skb(skb);
4d45b757 226 pr_err("%s - device in error state - dropping\n", __func__);
cfdda9d7
SW		 227 return -EIO;
228 }
229 error = cxgb4_ofld_send(rdev->lldi.ports[0], skb);
230 if (error < 0)
231 kfree_skb(skb);
74594861 232 return error < 0 ? error : 0;
cfdda9d7
SW		 233}
234
235static void release_tid(struct c4iw_rdev *rdev, u32 hwtid, struct sk_buff *skb)
236{
a1a23454 237 u32 len = roundup(sizeof(struct cpl_tid_release), 16);
cfdda9d7 238
a1a23454 239 skb = get_skb(skb, len, GFP_KERNEL);
cfdda9d7
SW		 240 if (!skb)
241 return;
a1a23454
VP		 242
243 cxgb_mk_tid_release(skb, len, hwtid, 0);
cfdda9d7
SW		 244 c4iw_ofld_send(rdev, skb);
245 return;
246}
247
248static void set_emss(struct c4iw_ep *ep, u16 opt)
249{
6c53e938 250 ep->emss = ep->com.dev->rdev.lldi.mtus[TCPOPT_MSS_G(opt)] -
04524a47
H		 251 ((AF_INET == ep->com.remote_addr.ss_family) ?
252 sizeof(struct iphdr) : sizeof(struct ipv6hdr)) -
253 sizeof(struct tcphdr);
cfdda9d7 254 ep->mss = ep->emss;
6c53e938 255 if (TCPOPT_TSTAMP_G(opt))
04524a47 256 ep->emss -= round_up(TCPOLEN_TIMESTAMP, 4);
cfdda9d7
SW		 257 if (ep->emss < 128)
258 ep->emss = 128;
92e7ae71 259 if (ep->emss & 7)
f48fca4d
BP		 260 pr_debug("Warning: misaligned mtu idx %u mss %u emss=%u\n",
261 TCPOPT_MSS_G(opt), ep->mss, ep->emss);
548ddb19
BP		 262 pr_debug("mss_idx %u mss %u emss=%u\n", TCPOPT_MSS_G(opt), ep->mss,
263 ep->emss);
cfdda9d7
SW		 264}
265
266static enum c4iw_ep_state state_read(struct c4iw_ep_common *epc)
267{
cfdda9d7
SW		 268 enum c4iw_ep_state state;
269
2f5b48c3 270 mutex_lock(&epc->mutex);
cfdda9d7 271 state = epc->state;
2f5b48c3 272 mutex_unlock(&epc->mutex);
cfdda9d7
SW		 273 return state;
274}
275
276static void __state_set(struct c4iw_ep_common *epc, enum c4iw_ep_state new)
277{
278 epc->state = new;
279}
280
281static void state_set(struct c4iw_ep_common *epc, enum c4iw_ep_state new)
282{
2f5b48c3 283 mutex_lock(&epc->mutex);
548ddb19 284 pr_debug("%s -> %s\n", states[epc->state], states[new]);
cfdda9d7 285 __state_set(epc, new);
2f5b48c3 286 mutex_unlock(&epc->mutex);
cfdda9d7
SW		 287 return;
288}
289
4a740838
H		 290static int alloc_ep_skb_list(struct sk_buff_head *ep_skb_list, int size)
291{
292 struct sk_buff *skb;
293 unsigned int i;
294 size_t len;
295
296 len = roundup(sizeof(union cpl_wr_size), 16);
297 for (i = 0; i < size; i++) {
298 skb = alloc_skb(len, GFP_KERNEL);
299 if (!skb)
300 goto fail;
301 skb_queue_tail(ep_skb_list, skb);
302 }
303 return 0;
304fail:
305 skb_queue_purge(ep_skb_list);
306 return -ENOMEM;
307}
308
cfdda9d7
SW		 309static void *alloc_ep(int size, gfp_t gfp)
310{
311 struct c4iw_ep_common *epc;
312
313 epc = kzalloc(size, gfp);
314 if (epc) {
2015f26c 315 epc->wr_waitp = c4iw_alloc_wr_wait(gfp);
ef885dc6
SW		 316 if (!epc->wr_waitp) {
317 kfree(epc);
318 epc = NULL;
319 goto out;
320 }
cfdda9d7 321 kref_init(&epc->kref);
2f5b48c3 322 mutex_init(&epc->mutex);
ef885dc6 323 c4iw_init_wr_wait(epc->wr_waitp);
cfdda9d7 324 }
548ddb19 325 pr_debug("alloc ep %p\n", epc);
ef885dc6 326out:
cfdda9d7
SW		 327 return epc;
328}
329
944661dd
H		 330static void remove_ep_tid(struct c4iw_ep *ep)
331{
332 unsigned long flags;
333
f254ba6a
MW		 334 xa_lock_irqsave(&ep->com.dev->hwtids, flags);
335 __xa_erase(&ep->com.dev->hwtids, ep->hwtid);
336 if (xa_empty(&ep->com.dev->hwtids))
37eb816c 337 wake_up(&ep->com.dev->wait);
f254ba6a 338 xa_unlock_irqrestore(&ep->com.dev->hwtids, flags);
944661dd
H		 339}
340
f254ba6a 341static int insert_ep_tid(struct c4iw_ep *ep)
944661dd
H		 342{
343 unsigned long flags;
f254ba6a
MW		 344 int err;
345
346 xa_lock_irqsave(&ep->com.dev->hwtids, flags);
347 err = __xa_insert(&ep->com.dev->hwtids, ep->hwtid, ep, GFP_KERNEL);
348 xa_unlock_irqrestore(&ep->com.dev->hwtids, flags);
944661dd 349
f254ba6a 350 return err;
944661dd
H		 351}
352
353/*
354 * Atomically lookup the ep ptr given the tid and grab a reference on the ep.
355 */
356static struct c4iw_ep *get_ep_from_tid(struct c4iw_dev *dev, unsigned int tid)
357{
358 struct c4iw_ep *ep;
359 unsigned long flags;
360
f254ba6a
MW		 361 xa_lock_irqsave(&dev->hwtids, flags);
362 ep = xa_load(&dev->hwtids, tid);
944661dd
H		 363 if (ep)
364 c4iw_get_ep(&ep->com);
f254ba6a 365 xa_unlock_irqrestore(&dev->hwtids, flags);
944661dd
H		 366 return ep;
367}
368
f86fac79
H		 369/*
370 * Atomically lookup the ep ptr given the stid and grab a reference on the ep.
371 */
372static struct c4iw_listen_ep *get_ep_from_stid(struct c4iw_dev *dev,
373 unsigned int stid)
374{
375 struct c4iw_listen_ep *ep;
376 unsigned long flags;
377
401b4480
MW		 378 xa_lock_irqsave(&dev->stids, flags);
379 ep = xa_load(&dev->stids, stid);
f86fac79
H		 380 if (ep)
381 c4iw_get_ep(&ep->com);
401b4480 382 xa_unlock_irqrestore(&dev->stids, flags);
f86fac79
H		 383 return ep;
384}
385
cfdda9d7
SW		 386void _c4iw_free_ep(struct kref *kref)
387{
388 struct c4iw_ep *ep;
389
390 ep = container_of(kref, struct c4iw_ep, com.kref);
548ddb19 391 pr_debug("ep %p state %s\n", ep, states[ep->com.state]);
325abead
VP		 392 if (test_bit(QP_REFERENCED, &ep->com.flags))
393 deref_qp(ep);
cfdda9d7 394 if (test_bit(RELEASE_RESOURCES, &ep->com.flags)) {
84cc6ac6
H		 395 if (ep->com.remote_addr.ss_family == AF_INET6) {
396 struct sockaddr_in6 *sin6 =
397 (struct sockaddr_in6 *)
170003c8 398 &ep->com.local_addr;
84cc6ac6
H		 399
400 cxgb4_clip_release(
401 ep->com.dev->rdev.lldi.ports[0],
402 (const u32 *)&sin6->sin6_addr.s6_addr,
403 1);
404 }
1dec4cec
GG		 405 cxgb4_remove_tid(ep->com.dev->rdev.lldi.tids, 0, ep->hwtid,
406 ep->com.local_addr.ss_family);
cfdda9d7
SW		 407 dst_release(ep->dst);
408 cxgb4_l2t_release(ep->l2t);
26f91da2 409 kfree_skb(ep->mpa_skb);
cfdda9d7 410 }
4a740838
H		 411 if (!skb_queue_empty(&ep->com.ep_skb_list))
412 skb_queue_purge(&ep->com.ep_skb_list);
2015f26c 413 c4iw_put_wr_wait(ep->com.wr_waitp);
cfdda9d7
SW		 414 kfree(ep);
415}
416
417static void release_ep_resources(struct c4iw_ep *ep)
418{
419 set_bit(RELEASE_RESOURCES, &ep->com.flags);
944661dd
H		 420
421 /*
422 * If we have a hwtid, then remove it from the idr table
423 * so lookups will no longer find this endpoint. Otherwise
424 * we have a race where one thread finds the ep ptr just
425 * before the other thread is freeing the ep memory.
426 */
427 if (ep->hwtid != -1)
428 remove_ep_tid(ep);
cfdda9d7
SW		 429 c4iw_put_ep(&ep->com);
430}
431
cfdda9d7
SW		 432static int status2errno(int status)
433{
434 switch (status) {
435 case CPL_ERR_NONE:
436 return 0;
437 case CPL_ERR_CONN_RESET:
438 return -ECONNRESET;
439 case CPL_ERR_ARP_MISS:
440 return -EHOSTUNREACH;
441 case CPL_ERR_CONN_TIMEDOUT:
442 return -ETIMEDOUT;
443 case CPL_ERR_TCAM_FULL:
444 return -ENOMEM;
445 case CPL_ERR_CONN_EXIST:
446 return -EADDRINUSE;
447 default:
448 return -EIO;
449 }
450}
451
452/*
453 * Try and reuse skbs already allocated...
454 */
455static struct sk_buff *get_skb(struct sk_buff *skb, int len, gfp_t gfp)
456{
457 if (skb && !skb_is_nonlinear(skb) && !skb_cloned(skb)) {
458 skb_trim(skb, 0);
459 skb_get(skb);
460 skb_reset_transport_header(skb);
461 } else {
462 skb = alloc_skb(len, gfp);
a6d2a5a9
CIK		 463 if (!skb)
464 return NULL;
cfdda9d7 465 }
b38a0ad8 466 t4_set_arp_err_handler(skb, NULL, NULL);
cfdda9d7
SW		 467 return skb;
468}
469
830662f6
VP		 470static struct net_device *get_real_dev(struct net_device *egress_dev)
471{
11b8e22d 472 return rdma_vlan_dev_real_dev(egress_dev) ? : egress_dev;
830662f6
VP		 473}
474
cfdda9d7
SW		 475static void arp_failure_discard(void *handle, struct sk_buff *skb)
476{
700456bd 477 pr_err("ARP failure\n");
cfdda9d7
SW		 478 kfree_skb(skb);
479}
480
64bec74a
H		 481static void mpa_start_arp_failure(void *handle, struct sk_buff *skb)
482{
483 pr_err("ARP failure during MPA Negotiation - Closing Connection\n");
484}
485
9dec900c 486enum {
8d1f1a6b 487 NUM_FAKE_CPLS = 2,
9dec900c 488 FAKE_CPL_PUT_EP_SAFE = NUM_CPL_CMDS + 0,
8d1f1a6b 489 FAKE_CPL_PASS_PUT_EP_SAFE = NUM_CPL_CMDS + 1,
9dec900c
H		 490};
491
492static int _put_ep_safe(struct c4iw_dev *dev, struct sk_buff *skb)
493{
494 struct c4iw_ep *ep;
495
496 ep = *((struct c4iw_ep **)(skb->cb + 2 * sizeof(void *)));
497 release_ep_resources(ep);
498 return 0;
499}
500
8d1f1a6b
H		 501static int _put_pass_ep_safe(struct c4iw_dev *dev, struct sk_buff *skb)
502{
503 struct c4iw_ep *ep;
504
505 ep = *((struct c4iw_ep **)(skb->cb + 2 * sizeof(void *)));
506 c4iw_put_ep(&ep->parent_ep->com);
507 release_ep_resources(ep);
508 return 0;
509}
510
9dec900c
H		 511/*
512 * Fake up a special CPL opcode and call sched() so process_work() will call
513 * _put_ep_safe() in a safe context to free the ep resources. This is needed
514 * because ARP error handlers are called in an ATOMIC context, and
515 * _c4iw_free_ep() needs to block.
516 */
8d1f1a6b
H		 517static void queue_arp_failure_cpl(struct c4iw_ep *ep, struct sk_buff *skb,
518 int cpl)
9dec900c
H		 519{
520 struct cpl_act_establish *rpl = cplhdr(skb);
521
522 /* Set our special ARP_FAILURE opcode */
8d1f1a6b 523 rpl->ot.opcode = cpl;
9dec900c
H		 524
525 /*
526 * Save ep in the skb->cb area, after where sched() will save the dev
527 * ptr.
528 */
529 *((struct c4iw_ep **)(skb->cb + 2 * sizeof(void *))) = ep;
530 sched(ep->com.dev, skb);
531}
532
533/* Handle an ARP failure for an accept */
534static void pass_accept_rpl_arp_failure(void *handle, struct sk_buff *skb)
535{
536 struct c4iw_ep *ep = handle;
537
700456bd 538 pr_err("ARP failure during accept - tid %u - dropping connection\n",
9dec900c
H		 539 ep->hwtid);
540
541 __state_set(&ep->com, DEAD);
8d1f1a6b 542 queue_arp_failure_cpl(ep, skb, FAKE_CPL_PASS_PUT_EP_SAFE);
9dec900c
H		 543}
544
cfdda9d7
SW		 545/*
546 * Handle an ARP failure for an active open.
547 */
548static void act_open_req_arp_failure(void *handle, struct sk_buff *skb)
549{
5dab6d3a
H		 550 struct c4iw_ep *ep = handle;
551
700456bd 552 pr_err("ARP failure during connect\n");
5dab6d3a 553 connect_reply_upcall(ep, -EHOSTUNREACH);
9dec900c 554 __state_set(&ep->com, DEAD);
84cc6ac6
H		 555 if (ep->com.remote_addr.ss_family == AF_INET6) {
556 struct sockaddr_in6 *sin6 =
170003c8 557 (struct sockaddr_in6 *)&ep->com.local_addr;
84cc6ac6
H		 558 cxgb4_clip_release(ep->com.dev->rdev.lldi.ports[0],
559 (const u32 *)&sin6->sin6_addr.s6_addr, 1);
560 }
9f5a9632 561 xa_erase_irq(&ep->com.dev->atids, ep->atid);
5dab6d3a 562 cxgb4_free_atid(ep->com.dev->rdev.lldi.tids, ep->atid);
8d1f1a6b 563 queue_arp_failure_cpl(ep, skb, FAKE_CPL_PUT_EP_SAFE);
cfdda9d7
SW		 564}
565
566/*
567 * Handle an ARP failure for a CPL_ABORT_REQ. Change it into a no RST variant
568 * and send it along.
569 */
570static void abort_arp_failure(void *handle, struct sk_buff *skb)
571{
761e19a5
H		 572 int ret;
573 struct c4iw_ep *ep = handle;
574 struct c4iw_rdev *rdev = &ep->com.dev->rdev;
cfdda9d7
SW		 575 struct cpl_abort_req *req = cplhdr(skb);
576
548ddb19 577 pr_debug("rdev %p\n", rdev);
cfdda9d7 578 req->cmd = CPL_ABORT_NO_RST;
1dad0ebe 579 skb_get(skb);
761e19a5
H		 580 ret = c4iw_ofld_send(rdev, skb);
581 if (ret) {
582 __state_set(&ep->com, DEAD);
583 queue_arp_failure_cpl(ep, skb, FAKE_CPL_PUT_EP_SAFE);
1dad0ebe
RR		 584 } else
585 kfree_skb(skb);
cfdda9d7
SW		 586}
587
4a740838 588static int send_flowc(struct c4iw_ep *ep)
cfdda9d7 589{
cfdda9d7 590 struct fw_flowc_wr *flowc;
4a740838 591 struct sk_buff *skb = skb_dequeue(&ep->com.ep_skb_list);
ac8e4c69
H		 592 u16 vlan = ep->l2t->vlan;
593 int nparams;
2e51e45c 594 int flowclen, flowclen16;
ac8e4c69 595
4a740838
H		 596 if (WARN_ON(!skb))
597 return -ENOMEM;
598
ac8e4c69 599 if (vlan == CPL_L2T_VLAN_NONE)
ac8e4c69 600 nparams = 9;
2e51e45c
PBT		 601 else
602 nparams = 10;
603
604 flowclen = offsetof(struct fw_flowc_wr, mnemval[nparams]);
605 flowclen16 = DIV_ROUND_UP(flowclen, 16);
606 flowclen = flowclen16 * 16;
cfdda9d7 607
2e51e45c
PBT		 608 flowc = __skb_put(skb, flowclen);
609 memset(flowc, 0, flowclen);
cfdda9d7 610
e2ac9628 611 flowc->op_to_nparams = cpu_to_be32(FW_WR_OP_V(FW_FLOWC_WR) |
ac8e4c69 612 FW_FLOWC_WR_NPARAMS_V(nparams));
2e51e45c
PBT		 613 flowc->flowid_len16 = cpu_to_be32(FW_WR_LEN16_V(flowclen16) |
614 FW_WR_FLOWID_V(ep->hwtid));
cfdda9d7
SW		 615
616 flowc->mnemval[0].mnemonic = FW_FLOWC_MNEM_PFNVFN;
5167865a 617 flowc->mnemval[0].val = cpu_to_be32(FW_PFVF_CMD_PFN_V
35b1de55 618 (ep->com.dev->rdev.lldi.pf));
cfdda9d7
SW		 619 flowc->mnemval[1].mnemonic = FW_FLOWC_MNEM_CH;
620 flowc->mnemval[1].val = cpu_to_be32(ep->tx_chan);
621 flowc->mnemval[2].mnemonic = FW_FLOWC_MNEM_PORT;
622 flowc->mnemval[2].val = cpu_to_be32(ep->tx_chan);
623 flowc->mnemval[3].mnemonic = FW_FLOWC_MNEM_IQID;
624 flowc->mnemval[3].val = cpu_to_be32(ep->rss_qid);
625 flowc->mnemval[4].mnemonic = FW_FLOWC_MNEM_SNDNXT;
626 flowc->mnemval[4].val = cpu_to_be32(ep->snd_seq);
627 flowc->mnemval[5].mnemonic = FW_FLOWC_MNEM_RCVNXT;
628 flowc->mnemval[5].val = cpu_to_be32(ep->rcv_seq);
629 flowc->mnemval[6].mnemonic = FW_FLOWC_MNEM_SNDBUF;
b408ff28 630 flowc->mnemval[6].val = cpu_to_be32(ep->snd_win);
cfdda9d7
SW		 631 flowc->mnemval[7].mnemonic = FW_FLOWC_MNEM_MSS;
632 flowc->mnemval[7].val = cpu_to_be32(ep->emss);
2e51e45c
PBT		 633 flowc->mnemval[8].mnemonic = FW_FLOWC_MNEM_RCV_SCALE;
634 flowc->mnemval[8].val = cpu_to_be32(ep->snd_wscale);
635 if (nparams == 10) {
ac8e4c69 636 u16 pri;
ac8e4c69 637 pri = (vlan & VLAN_PRIO_MASK) >> VLAN_PRIO_SHIFT;
2e51e45c
PBT		 638 flowc->mnemval[9].mnemonic = FW_FLOWC_MNEM_SCHEDCLASS;
639 flowc->mnemval[9].val = cpu_to_be32(pri);
cfdda9d7
SW		 640 }
641
642 set_wr_txq(skb, CPL_PRIORITY_DATA, ep->txq_idx);
fef4422d 643 return c4iw_ofld_send(&ep->com.dev->rdev, skb);
cfdda9d7
SW		 644}
645
4a740838 646static int send_halfclose(struct c4iw_ep *ep)
cfdda9d7 647{
4a740838 648 struct sk_buff *skb = skb_dequeue(&ep->com.ep_skb_list);
29fb6f42 649 u32 wrlen = roundup(sizeof(struct cpl_close_con_req), 16);
cfdda9d7 650
548ddb19 651 pr_debug("ep %p tid %u\n", ep, ep->hwtid);
4a740838 652 if (WARN_ON(!skb))
cfdda9d7 653 return -ENOMEM;
4a740838 654
29fb6f42
VP		 655 cxgb_mk_close_con_req(skb, wrlen, ep->hwtid, ep->txq_idx,
656 NULL, arp_failure_discard);
657
cfdda9d7
SW		 658 return c4iw_l2t_send(&ep->com.dev->rdev, skb, ep->l2t);
659}
660
3b8f8b95 661static void read_tcb(struct c4iw_ep *ep)
11a27e21
RR		 662{
663 struct sk_buff *skb;
664 struct cpl_get_tcb *req;
665 int wrlen = roundup(sizeof(*req), 16);
666
667 skb = get_skb(NULL, sizeof(*req), GFP_KERNEL);
668 if (WARN_ON(!skb))
669 return;
670
671 set_wr_txq(skb, CPL_PRIORITY_CONTROL, ep->ctrlq_idx);
672 req = (struct cpl_get_tcb *) skb_put(skb, wrlen);
673 memset(req, 0, wrlen);
674 INIT_TP_WR(req, ep->hwtid);
675 OPCODE_TID(req) = cpu_to_be32(MK_OPCODE_TID(CPL_GET_TCB, ep->hwtid));
676 req->reply_ctrl = htons(REPLY_CHAN_V(0) | QUEUENO_V(ep->rss_qid));
677
678 /*
679 * keep a ref on the ep so the tcb is not unlocked before this
680 * cpl completes. The ref is released in read_tcb_rpl().
681 */
682 c4iw_get_ep(&ep->com);
683 if (WARN_ON(c4iw_ofld_send(&ep->com.dev->rdev, skb)))
684 c4iw_put_ep(&ep->com);
685}
686
687static int send_abort_req(struct c4iw_ep *ep)
cfdda9d7 688{
a7e1a97f 689 u32 wrlen = roundup(sizeof(struct cpl_abort_req), 16);
4a740838 690 struct sk_buff *req_skb = skb_dequeue(&ep->com.ep_skb_list);
cfdda9d7 691
548ddb19 692 pr_debug("ep %p tid %u\n", ep, ep->hwtid);
4a740838 693 if (WARN_ON(!req_skb))
cfdda9d7 694 return -ENOMEM;
4a740838 695
a7e1a97f
VP		 696 cxgb_mk_abort_req(req_skb, wrlen, ep->hwtid, ep->txq_idx,
697 ep, abort_arp_failure);
698
4a740838 699 return c4iw_l2t_send(&ep->com.dev->rdev, req_skb, ep->l2t);
cfdda9d7
SW		 700}
701
11a27e21
RR		 702static int send_abort(struct c4iw_ep *ep)
703{
704 if (!ep->com.qp || !ep->com.qp->srq) {
705 send_abort_req(ep);
706 return 0;
707 }
708 set_bit(ABORT_REQ_IN_PROGRESS, &ep->com.flags);
709 read_tcb(ep);
710 return 0;
711}
712
cfdda9d7
SW		 713static int send_connect(struct c4iw_ep *ep)
714{
963cab50
H		 715 struct cpl_act_open_req *req = NULL;
716 struct cpl_t5_act_open_req *t5req = NULL;
717 struct cpl_t6_act_open_req *t6req = NULL;
718 struct cpl_act_open_req6 *req6 = NULL;
719 struct cpl_t5_act_open_req6 *t5req6 = NULL;
720 struct cpl_t6_act_open_req6 *t6req6 = NULL;
cfdda9d7
SW		 721 struct sk_buff *skb;
722 u64 opt0;
723 u32 opt2;
724 unsigned int mtu_idx;
cc516700 725 u32 wscale;
963cab50 726 int win, sizev4, sizev6, wrlen;
9eccfe10 727 struct sockaddr_in *la = (struct sockaddr_in *)
170003c8 728 &ep->com.local_addr;
9eccfe10 729 struct sockaddr_in *ra = (struct sockaddr_in *)
170003c8 730 &ep->com.remote_addr;
9eccfe10 731 struct sockaddr_in6 *la6 = (struct sockaddr_in6 *)
170003c8 732 &ep->com.local_addr;
9eccfe10 733 struct sockaddr_in6 *ra6 = (struct sockaddr_in6 *)
170003c8 734 &ep->com.remote_addr;
84cc6ac6 735 int ret;
963cab50
H		 736 enum chip_type adapter_type = ep->com.dev->rdev.lldi.adapter_type;
737 u32 isn = (prandom_u32() & ~7UL) - 1;
192539f4
GG		 738 struct net_device *netdev;
739 u64 params;
740
741 netdev = ep->com.dev->rdev.lldi.ports[0];
963cab50
H		 742
743 switch (CHELSIO_CHIP_VERSION(adapter_type)) {
744 case CHELSIO_T4:
745 sizev4 = sizeof(struct cpl_act_open_req);
746 sizev6 = sizeof(struct cpl_act_open_req6);
747 break;
748 case CHELSIO_T5:
749 sizev4 = sizeof(struct cpl_t5_act_open_req);
750 sizev6 = sizeof(struct cpl_t5_act_open_req6);
751 break;
752 case CHELSIO_T6:
753 sizev4 = sizeof(struct cpl_t6_act_open_req);
754 sizev6 = sizeof(struct cpl_t6_act_open_req6);
755 break;
756 default:
757 pr_err("T%d Chip is not supported\n",
758 CHELSIO_CHIP_VERSION(adapter_type));
759 return -EINVAL;
760 }
830662f6
VP		 761
762 wrlen = (ep->com.remote_addr.ss_family == AF_INET) ?
763 roundup(sizev4, 16) :
764 roundup(sizev6, 16);
cfdda9d7 765
548ddb19 766 pr_debug("ep %p atid %u\n", ep, ep->atid);
cfdda9d7
SW		 767
768 skb = get_skb(NULL, wrlen, GFP_KERNEL);
769 if (!skb) {
700456bd 770 pr_err("%s - failed to alloc skb\n", __func__);
cfdda9d7
SW		 771 return -ENOMEM;
772 }
d4f1a5c6 773 set_wr_txq(skb, CPL_PRIORITY_SETUP, ep->ctrlq_idx);
cfdda9d7 774
44c6d069
VP		 775 cxgb_best_mtu(ep->com.dev->rdev.lldi.mtus, ep->mtu, &mtu_idx,
776 enable_tcp_timestamps,
777 (ep->com.remote_addr.ss_family == AF_INET) ? 0 : 1);
cc516700 778 wscale = cxgb_compute_wscale(rcv_win);
b408ff28
HS		 779
780 /*
781 * Specify the largest window that will fit in opt0. The
782 * remainder will be specified in the rx_data_ack.
783 */
784 win = ep->rcv_win >> 10;
d7990b0c
AB		 785 if (win > RCV_BUFSIZ_M)
786 win = RCV_BUFSIZ_M;
b408ff28 787
6c53e938 788 opt0 = (nocong ? NO_CONG_F : 0) |
d7990b0c 789 KEEP_ALIVE_F |
6c53e938 790 DELACK_F |
d7990b0c
AB		 791 WND_SCALE_V(wscale) |
792 MSS_IDX_V(mtu_idx) |
793 L2T_IDX_V(ep->l2t->idx) |
794 TX_CHAN_V(ep->tx_chan) |
795 SMAC_SEL_V(ep->smac_idx) |
ac8e4c69 796 DSCP_V(ep->tos >> 2) |
d7990b0c
AB		 797 ULP_MODE_V(ULP_MODE_TCPDDP) |
798 RCV_BUFSIZ_V(win);
799 opt2 = RX_CHANNEL_V(0) |
6c53e938 800 CCTRL_ECN_V(enable_ecn) |
d7990b0c 801 RSS_QUEUE_VALID_F | RSS_QUEUE_V(ep->rss_qid);
cfdda9d7 802 if (enable_tcp_timestamps)
6c53e938 803 opt2 |= TSTAMPS_EN_F;
cfdda9d7 804 if (enable_tcp_sack)
6c53e938 805 opt2 |= SACK_EN_F;
cfdda9d7 806 if (wscale && enable_tcp_window_scaling)
d7990b0c 807 opt2 |= WND_SCALE_EN_F;
963cab50
H		 808 if (CHELSIO_CHIP_VERSION(adapter_type) > CHELSIO_T4) {
809 if (peer2peer)
810 isn += 4;
811
d7990b0c 812 opt2 |= T5_OPT_2_VALID_F;
cf7fe64a 813 opt2 |= CONG_CNTRL_V(CONG_ALG_TAHOE);
0b741047 814 opt2 |= T5_ISS_F;
92e5011a 815 }
84cc6ac6 816
192539f4
GG		 817 params = cxgb4_select_ntuple(netdev, ep->l2t);
818
84cc6ac6
H		 819 if (ep->com.remote_addr.ss_family == AF_INET6)
820 cxgb4_clip_get(ep->com.dev->rdev.lldi.ports[0],
821 (const u32 *)&la6->sin6_addr.s6_addr, 1);
822
5dab6d3a 823 t4_set_arp_err_handler(skb, ep, act_open_req_arp_failure);
cfdda9d7 824
963cab50
H		 825 if (ep->com.remote_addr.ss_family == AF_INET) {
826 switch (CHELSIO_CHIP_VERSION(adapter_type)) {
827 case CHELSIO_T4:
4df864c1 828 req = skb_put(skb, wrlen);
830662f6 829 INIT_TP_WR(req, 0);
963cab50
H		 830 break;
831 case CHELSIO_T5:
4df864c1 832 t5req = skb_put(skb, wrlen);
963cab50
H		 833 INIT_TP_WR(t5req, 0);
834 req = (struct cpl_act_open_req *)t5req;
835 break;
836 case CHELSIO_T6:
4df864c1 837 t6req = skb_put(skb, wrlen);
963cab50
H		 838 INIT_TP_WR(t6req, 0);
839 req = (struct cpl_act_open_req *)t6req;
840 t5req = (struct cpl_t5_act_open_req *)t6req;
841 break;
842 default:
843 pr_err("T%d Chip is not supported\n",
844 CHELSIO_CHIP_VERSION(adapter_type));
845 ret = -EINVAL;
846 goto clip_release;
847 }
848
849 OPCODE_TID(req) = cpu_to_be32(MK_OPCODE_TID(CPL_ACT_OPEN_REQ,
850 ((ep->rss_qid<<14) | ep->atid)));
851 req->local_port = la->sin_port;
852 req->peer_port = ra->sin_port;
853 req->local_ip = la->sin_addr.s_addr;
854 req->peer_ip = ra->sin_addr.s_addr;
855 req->opt0 = cpu_to_be64(opt0);
856
857 if (is_t4(ep->com.dev->rdev.lldi.adapter_type)) {
192539f4 858 req->params = cpu_to_be32(params);
830662f6
VP		 859 req->opt2 = cpu_to_be32(opt2);
860 } else {
192539f4
GG		 861 if (is_t5(ep->com.dev->rdev.lldi.adapter_type)) {
862 t5req->params =
863 cpu_to_be64(FILTER_TUPLE_V(params));
864 t5req->rsvd = cpu_to_be32(isn);
70d72568 865 pr_debug("snd_isn %u\n", t5req->rsvd);
192539f4
GG		 866 t5req->opt2 = cpu_to_be32(opt2);
867 } else {
868 t6req->params =
869 cpu_to_be64(FILTER_TUPLE_V(params));
870 t6req->rsvd = cpu_to_be32(isn);
70d72568 871 pr_debug("snd_isn %u\n", t6req->rsvd);
192539f4
GG		 872 t6req->opt2 = cpu_to_be32(opt2);
873 }
963cab50
H		 874 }
875 } else {
876 switch (CHELSIO_CHIP_VERSION(adapter_type)) {
877 case CHELSIO_T4:
4df864c1 878 req6 = skb_put(skb, wrlen);
830662f6 879 INIT_TP_WR(req6, 0);
963cab50
H		 880 break;
881 case CHELSIO_T5:
4df864c1 882 t5req6 = skb_put(skb, wrlen);
963cab50
H		 883 INIT_TP_WR(t5req6, 0);
884 req6 = (struct cpl_act_open_req6 *)t5req6;
885 break;
886 case CHELSIO_T6:
4df864c1 887 t6req6 = skb_put(skb, wrlen);
963cab50
H		 888 INIT_TP_WR(t6req6, 0);
889 req6 = (struct cpl_act_open_req6 *)t6req6;
890 t5req6 = (struct cpl_t5_act_open_req6 *)t6req6;
891 break;
892 default:
893 pr_err("T%d Chip is not supported\n",
894 CHELSIO_CHIP_VERSION(adapter_type));
895 ret = -EINVAL;
896 goto clip_release;
897 }
898
899 OPCODE_TID(req6) = cpu_to_be32(MK_OPCODE_TID(CPL_ACT_OPEN_REQ6,
900 ((ep->rss_qid<<14)|ep->atid)));
901 req6->local_port = la6->sin6_port;
902 req6->peer_port = ra6->sin6_port;
903 req6->local_ip_hi = *((__be64 *)(la6->sin6_addr.s6_addr));
904 req6->local_ip_lo = *((__be64 *)(la6->sin6_addr.s6_addr + 8));
905 req6->peer_ip_hi = *((__be64 *)(ra6->sin6_addr.s6_addr));
906 req6->peer_ip_lo = *((__be64 *)(ra6->sin6_addr.s6_addr + 8));
907 req6->opt0 = cpu_to_be64(opt0);
908
909 if (is_t4(ep->com.dev->rdev.lldi.adapter_type)) {
192539f4
GG		 910 req6->params = cpu_to_be32(cxgb4_select_ntuple(netdev,
911 ep->l2t));
830662f6 912 req6->opt2 = cpu_to_be32(opt2);
830662f6 913 } else {
192539f4
GG		 914 if (is_t5(ep->com.dev->rdev.lldi.adapter_type)) {
915 t5req6->params =
916 cpu_to_be64(FILTER_TUPLE_V(params));
917 t5req6->rsvd = cpu_to_be32(isn);
70d72568 918 pr_debug("snd_isn %u\n", t5req6->rsvd);
192539f4
GG		 919 t5req6->opt2 = cpu_to_be32(opt2);
920 } else {
921 t6req6->params =
922 cpu_to_be64(FILTER_TUPLE_V(params));
923 t6req6->rsvd = cpu_to_be32(isn);
70d72568 924 pr_debug("snd_isn %u\n", t6req6->rsvd);
192539f4
GG		 925 t6req6->opt2 = cpu_to_be32(opt2);
926 }
927
830662f6 928 }
f079af7a
VP		 929 }
930
793dad94 931 set_bit(ACT_OPEN_REQ, &ep->com.history);
84cc6ac6 932 ret = c4iw_l2t_send(&ep->com.dev->rdev, skb, ep->l2t);
963cab50 933clip_release:
84cc6ac6
H		 934 if (ret && ep->com.remote_addr.ss_family == AF_INET6)
935 cxgb4_clip_release(ep->com.dev->rdev.lldi.ports[0],
936 (const u32 *)&la6->sin6_addr.s6_addr, 1);
937 return ret;
cfdda9d7
SW		 938}
939
caa6c9f2
H		 940static int send_mpa_req(struct c4iw_ep *ep, struct sk_buff *skb,
941 u8 mpa_rev_to_use)
cfdda9d7 942{
caa6c9f2 943 int mpalen, wrlen, ret;
cfdda9d7
SW		 944 struct fw_ofld_tx_data_wr *req;
945 struct mpa_message *mpa;
d2fe99e8 946 struct mpa_v2_conn_params mpa_v2_params;
cfdda9d7 947
548ddb19
BP		 948 pr_debug("ep %p tid %u pd_len %d\n",
949 ep, ep->hwtid, ep->plen);
cfdda9d7 950
cfdda9d7 951 mpalen = sizeof(*mpa) + ep->plen;
d2fe99e8
KS		 952 if (mpa_rev_to_use == 2)
953 mpalen += sizeof(struct mpa_v2_conn_params);
34d56893 954 wrlen = roundup(mpalen + sizeof(*req), 16);
cfdda9d7
SW		 955 skb = get_skb(skb, wrlen, GFP_KERNEL);
956 if (!skb) {
957 connect_reply_upcall(ep, -ENOMEM);
caa6c9f2 958 return -ENOMEM;
cfdda9d7
SW		 959 }
960 set_wr_txq(skb, CPL_PRIORITY_DATA, ep->txq_idx);
961
b080db58 962 req = skb_put_zero(skb, wrlen);
cfdda9d7 963 req->op_to_immdlen = cpu_to_be32(
e2ac9628
HS		 964 FW_WR_OP_V(FW_OFLD_TX_DATA_WR) |
965 FW_WR_COMPL_F |
966 FW_WR_IMMDLEN_V(mpalen));
cfdda9d7 967 req->flowid_len16 = cpu_to_be32(
e2ac9628
HS		 968 FW_WR_FLOWID_V(ep->hwtid) |
969 FW_WR_LEN16_V(wrlen >> 4));
cfdda9d7
SW		 970 req->plen = cpu_to_be32(mpalen);
971 req->tunnel_to_proxy = cpu_to_be32(
e2ac9628
HS		 972 FW_OFLD_TX_DATA_WR_FLUSH_F |
973 FW_OFLD_TX_DATA_WR_SHOVE_F);
cfdda9d7
SW		 974
975 mpa = (struct mpa_message *)(req + 1);
976 memcpy(mpa->key, MPA_KEY_REQ, sizeof(mpa->key));
3d4e7994
H		 977
978 mpa->flags = 0;
979 if (crc_enabled)
980 mpa->flags |= MPA_CRC;
981 if (markers_enabled) {
982 mpa->flags |= MPA_MARKERS;
983 ep->mpa_attr.recv_marker_enabled = 1;
984 } else {
985 ep->mpa_attr.recv_marker_enabled = 0;
986 }
987 if (mpa_rev_to_use == 2)
988 mpa->flags |= MPA_ENHANCED_RDMA_CONN;
989
cfdda9d7 990 mpa->private_data_size = htons(ep->plen);
d2fe99e8 991 mpa->revision = mpa_rev_to_use;
01b225e1 992 if (mpa_rev_to_use == 1) {
d2fe99e8 993 ep->tried_with_mpa_v1 = 1;
01b225e1
KS		 994 ep->retry_with_mpa_v1 = 0;
995 }
d2fe99e8
KS		 996
997 if (mpa_rev_to_use == 2) {
34d56893
LR		 998 mpa->private_data_size =
999 htons(ntohs(mpa->private_data_size) +
1000 sizeof(struct mpa_v2_conn_params));
548ddb19 1001 pr_debug("initiator ird %u ord %u\n", ep->ird,
a9a42886 1002 ep->ord);
d2fe99e8
KS		 1003 mpa_v2_params.ird = htons((u16)ep->ird);
1004 mpa_v2_params.ord = htons((u16)ep->ord);
1005
1006 if (peer2peer) {
1007 mpa_v2_params.ird |= htons(MPA_V2_PEER2PEER_MODEL);
1008 if (p2p_type == FW_RI_INIT_P2PTYPE_RDMA_WRITE)
1009 mpa_v2_params.ord |=
1010 htons(MPA_V2_RDMA_WRITE_RTR);
1011 else if (p2p_type == FW_RI_INIT_P2PTYPE_READ_REQ)
1012 mpa_v2_params.ord |=
1013 htons(MPA_V2_RDMA_READ_RTR);
1014 }
1015 memcpy(mpa->private_data, &mpa_v2_params,
1016 sizeof(struct mpa_v2_conn_params));
cfdda9d7 1017
d2fe99e8
KS		 1018 if (ep->plen)
1019 memcpy(mpa->private_data +
1020 sizeof(struct mpa_v2_conn_params),
1021 ep->mpa_pkt + sizeof(*mpa), ep->plen);
1022 } else
1023 if (ep->plen)
1024 memcpy(mpa->private_data,
1025 ep->mpa_pkt + sizeof(*mpa), ep->plen);
cfdda9d7
SW		 1026
1027 /*
1028 * Reference the mpa skb. This ensures the data area
1029 * will remain in memory until the hw acks the tx.
1030 * Function fw4_ack() will deref it.
1031 */
1032 skb_get(skb);
1033 t4_set_arp_err_handler(skb, NULL, arp_failure_discard);
cfdda9d7 1034 ep->mpa_skb = skb;
caa6c9f2
H		 1035 ret = c4iw_l2t_send(&ep->com.dev->rdev, skb, ep->l2t);
1036 if (ret)
1037 return ret;
cfdda9d7 1038 start_ep_timer(ep);
a7db89eb 1039 __state_set(&ep->com, MPA_REQ_SENT);
cfdda9d7 1040 ep->mpa_attr.initiator = 1;
9c88aa00 1041 ep->snd_seq += mpalen;
caa6c9f2 1042 return ret;
cfdda9d7
SW		 1043}
1044
1045static int send_mpa_reject(struct c4iw_ep *ep, const void *pdata, u8 plen)
1046{
1047 int mpalen, wrlen;
1048 struct fw_ofld_tx_data_wr *req;
1049 struct mpa_message *mpa;
1050 struct sk_buff *skb;
d2fe99e8 1051 struct mpa_v2_conn_params mpa_v2_params;
cfdda9d7 1052
548ddb19
BP		 1053 pr_debug("ep %p tid %u pd_len %d\n",
1054 ep, ep->hwtid, ep->plen);
cfdda9d7
SW		 1055
1056 mpalen = sizeof(*mpa) + plen;
d2fe99e8
KS		 1057 if (ep->mpa_attr.version == 2 && ep->mpa_attr.enhanced_rdma_conn)
1058 mpalen += sizeof(struct mpa_v2_conn_params);
34d56893 1059 wrlen = roundup(mpalen + sizeof(*req), 16);
cfdda9d7
SW		 1060
1061 skb = get_skb(NULL, wrlen, GFP_KERNEL);
1062 if (!skb) {
700456bd 1063 pr_err("%s - cannot alloc skb!\n", __func__);
cfdda9d7
SW		 1064 return -ENOMEM;
1065 }
1066 set_wr_txq(skb, CPL_PRIORITY_DATA, ep->txq_idx);
1067
b080db58 1068 req = skb_put_zero(skb, wrlen);
cfdda9d7 1069 req->op_to_immdlen = cpu_to_be32(
e2ac9628
HS		 1070 FW_WR_OP_V(FW_OFLD_TX_DATA_WR) |
1071 FW_WR_COMPL_F |
1072 FW_WR_IMMDLEN_V(mpalen));
cfdda9d7 1073 req->flowid_len16 = cpu_to_be32(
e2ac9628
HS		 1074 FW_WR_FLOWID_V(ep->hwtid) |
1075 FW_WR_LEN16_V(wrlen >> 4));
cfdda9d7
SW		 1076 req->plen = cpu_to_be32(mpalen);
1077 req->tunnel_to_proxy = cpu_to_be32(
e2ac9628
HS		 1078 FW_OFLD_TX_DATA_WR_FLUSH_F |
1079 FW_OFLD_TX_DATA_WR_SHOVE_F);
cfdda9d7
SW		 1080
1081 mpa = (struct mpa_message *)(req + 1);
1082 memset(mpa, 0, sizeof(*mpa));
1083 memcpy(mpa->key, MPA_KEY_REP, sizeof(mpa->key));
1084 mpa->flags = MPA_REJECT;
fe7e0a4d 1085 mpa->revision = ep->mpa_attr.version;
cfdda9d7 1086 mpa->private_data_size = htons(plen);
d2fe99e8
KS		 1087
1088 if (ep->mpa_attr.version == 2 && ep->mpa_attr.enhanced_rdma_conn) {
1089 mpa->flags |= MPA_ENHANCED_RDMA_CONN;
34d56893
LR		 1090 mpa->private_data_size =
1091 htons(ntohs(mpa->private_data_size) +
1092 sizeof(struct mpa_v2_conn_params));
d2fe99e8
KS		 1093 mpa_v2_params.ird = htons(((u16)ep->ird) |
1094 (peer2peer ? MPA_V2_PEER2PEER_MODEL :
1095 0));
1096 mpa_v2_params.ord = htons(((u16)ep->ord) | (peer2peer ?
1097 (p2p_type ==
1098 FW_RI_INIT_P2PTYPE_RDMA_WRITE ?
1099 MPA_V2_RDMA_WRITE_RTR : p2p_type ==
1100 FW_RI_INIT_P2PTYPE_READ_REQ ?
1101 MPA_V2_RDMA_READ_RTR : 0) : 0));
1102 memcpy(mpa->private_data, &mpa_v2_params,
1103 sizeof(struct mpa_v2_conn_params));
1104
1105 if (ep->plen)
1106 memcpy(mpa->private_data +
1107 sizeof(struct mpa_v2_conn_params), pdata, plen);
1108 } else
1109 if (plen)
1110 memcpy(mpa->private_data, pdata, plen);
cfdda9d7
SW		 1111
1112 /*
1113 * Reference the mpa skb again. This ensures the data area
1114 * will remain in memory until the hw acks the tx.
1115 * Function fw4_ack() will deref it.
1116 */
1117 skb_get(skb);
1118 set_wr_txq(skb, CPL_PRIORITY_DATA, ep->txq_idx);
64bec74a 1119 t4_set_arp_err_handler(skb, NULL, mpa_start_arp_failure);
cfdda9d7 1120 ep->mpa_skb = skb;
9c88aa00 1121 ep->snd_seq += mpalen;
cfdda9d7
SW		 1122 return c4iw_l2t_send(&ep->com.dev->rdev, skb, ep->l2t);
1123}
1124
1125static int send_mpa_reply(struct c4iw_ep *ep, const void *pdata, u8 plen)
1126{
1127 int mpalen, wrlen;
1128 struct fw_ofld_tx_data_wr *req;
1129 struct mpa_message *mpa;
1130 struct sk_buff *skb;
d2fe99e8 1131 struct mpa_v2_conn_params mpa_v2_params;
cfdda9d7 1132
548ddb19
BP		 1133 pr_debug("ep %p tid %u pd_len %d\n",
1134 ep, ep->hwtid, ep->plen);
cfdda9d7
SW		 1135
1136 mpalen = sizeof(*mpa) + plen;
d2fe99e8
KS		 1137 if (ep->mpa_attr.version == 2 && ep->mpa_attr.enhanced_rdma_conn)
1138 mpalen += sizeof(struct mpa_v2_conn_params);
34d56893 1139 wrlen = roundup(mpalen + sizeof(*req), 16);
cfdda9d7
SW		 1140
1141 skb = get_skb(NULL, wrlen, GFP_KERNEL);
1142 if (!skb) {
700456bd 1143 pr_err("%s - cannot alloc skb!\n", __func__);
cfdda9d7
SW		 1144 return -ENOMEM;
1145 }
1146 set_wr_txq(skb, CPL_PRIORITY_DATA, ep->txq_idx);
1147
b080db58 1148 req = skb_put_zero(skb, wrlen);
cfdda9d7 1149 req->op_to_immdlen = cpu_to_be32(
e2ac9628
HS		 1150 FW_WR_OP_V(FW_OFLD_TX_DATA_WR) |
1151 FW_WR_COMPL_F |
1152 FW_WR_IMMDLEN_V(mpalen));
cfdda9d7 1153 req->flowid_len16 = cpu_to_be32(
e2ac9628
HS		 1154 FW_WR_FLOWID_V(ep->hwtid) |
1155 FW_WR_LEN16_V(wrlen >> 4));
cfdda9d7
SW		 1156 req->plen = cpu_to_be32(mpalen);
1157 req->tunnel_to_proxy = cpu_to_be32(
e2ac9628
HS		 1158 FW_OFLD_TX_DATA_WR_FLUSH_F |
1159 FW_OFLD_TX_DATA_WR_SHOVE_F);
cfdda9d7
SW		 1160
1161 mpa = (struct mpa_message *)(req + 1);
1162 memset(mpa, 0, sizeof(*mpa));
1163 memcpy(mpa->key, MPA_KEY_REP, sizeof(mpa->key));
3d4e7994
H		 1164 mpa->flags = 0;
1165 if (ep->mpa_attr.crc_enabled)
1166 mpa->flags |= MPA_CRC;
1167 if (ep->mpa_attr.recv_marker_enabled)
1168 mpa->flags |= MPA_MARKERS;
d2fe99e8 1169 mpa->revision = ep->mpa_attr.version;
cfdda9d7 1170 mpa->private_data_size = htons(plen);
d2fe99e8
KS		 1171
1172 if (ep->mpa_attr.version == 2 && ep->mpa_attr.enhanced_rdma_conn) {
1173 mpa->flags |= MPA_ENHANCED_RDMA_CONN;
34d56893
LR		 1174 mpa->private_data_size =
1175 htons(ntohs(mpa->private_data_size) +
1176 sizeof(struct mpa_v2_conn_params));
d2fe99e8
KS		 1177 mpa_v2_params.ird = htons((u16)ep->ird);
1178 mpa_v2_params.ord = htons((u16)ep->ord);
1179 if (peer2peer && (ep->mpa_attr.p2p_type !=
1180 FW_RI_INIT_P2PTYPE_DISABLED)) {
1181 mpa_v2_params.ird |= htons(MPA_V2_PEER2PEER_MODEL);
1182
1183 if (p2p_type == FW_RI_INIT_P2PTYPE_RDMA_WRITE)
1184 mpa_v2_params.ord |=
1185 htons(MPA_V2_RDMA_WRITE_RTR);
1186 else if (p2p_type == FW_RI_INIT_P2PTYPE_READ_REQ)
1187 mpa_v2_params.ord |=
1188 htons(MPA_V2_RDMA_READ_RTR);
1189 }
1190
1191 memcpy(mpa->private_data, &mpa_v2_params,
1192 sizeof(struct mpa_v2_conn_params));
1193
1194 if (ep->plen)
1195 memcpy(mpa->private_data +
1196 sizeof(struct mpa_v2_conn_params), pdata, plen);
1197 } else
1198 if (plen)
1199 memcpy(mpa->private_data, pdata, plen);
cfdda9d7
SW		 1200
1201 /*
1202 * Reference the mpa skb. This ensures the data area
1203 * will remain in memory until the hw acks the tx.
1204 * Function fw4_ack() will deref it.
1205 */
1206 skb_get(skb);
64bec74a 1207 t4_set_arp_err_handler(skb, NULL, mpa_start_arp_failure);
cfdda9d7 1208 ep->mpa_skb = skb;
a7db89eb 1209 __state_set(&ep->com, MPA_REP_SENT);
9c88aa00 1210 ep->snd_seq += mpalen;
cfdda9d7
SW		 1211 return c4iw_l2t_send(&ep->com.dev->rdev, skb, ep->l2t);
1212}
1213
1214static int act_establish(struct c4iw_dev *dev, struct sk_buff *skb)
1215{
1216 struct c4iw_ep *ep;
1217 struct cpl_act_establish *req = cplhdr(skb);
2e51e45c 1218 unsigned short tcp_opt = ntohs(req->tcp_opt);
cfdda9d7 1219 unsigned int tid = GET_TID(req);
6c53e938 1220 unsigned int atid = TID_TID_G(ntohl(req->tos_atid));
cfdda9d7 1221 struct tid_info *t = dev->rdev.lldi.tids;
fef4422d 1222 int ret;
cfdda9d7
SW		 1223
1224 ep = lookup_atid(t, atid);
1225
548ddb19 1226 pr_debug("ep %p tid %u snd_isn %u rcv_isn %u\n", ep, tid,
a9a42886 1227 be32_to_cpu(req->snd_isn), be32_to_cpu(req->rcv_isn));
cfdda9d7 1228
a7db89eb 1229 mutex_lock(&ep->com.mutex);
cfdda9d7
SW		 1230 dst_confirm(ep->dst);
1231
1232 /* setup the hwtid for this connection */
1233 ep->hwtid = tid;
1dec4cec 1234 cxgb4_insert_tid(t, ep, tid, ep->com.local_addr.ss_family);
944661dd 1235 insert_ep_tid(ep);
cfdda9d7
SW		 1236
1237 ep->snd_seq = be32_to_cpu(req->snd_isn);
1238 ep->rcv_seq = be32_to_cpu(req->rcv_isn);
2e51e45c 1239 ep->snd_wscale = TCPOPT_SND_WSCALE_G(tcp_opt);
cfdda9d7 1240
2e51e45c 1241 set_emss(ep, tcp_opt);
cfdda9d7
SW		 1242
1243 /* dealloc the atid */
9f5a9632 1244 xa_erase_irq(&ep->com.dev->atids, atid);
cfdda9d7 1245 cxgb4_free_atid(t, atid);
793dad94 1246 set_bit(ACT_ESTAB, &ep->com.history);
cfdda9d7
SW		 1247
1248 /* start MPA negotiation */
4a740838 1249 ret = send_flowc(ep);
fef4422d
H		 1250 if (ret)
1251 goto err;
d2fe99e8 1252 if (ep->retry_with_mpa_v1)
caa6c9f2 1253 ret = send_mpa_req(ep, skb, 1);
d2fe99e8 1254 else
caa6c9f2
H		 1255 ret = send_mpa_req(ep, skb, mpa_rev);
1256 if (ret)
1257 goto err;
a7db89eb 1258 mutex_unlock(&ep->com.mutex);
cfdda9d7 1259 return 0;
fef4422d
H		 1260err:
1261 mutex_unlock(&ep->com.mutex);
1262 connect_reply_upcall(ep, -ENOMEM);
1263 c4iw_ep_disconnect(ep, 0, GFP_KERNEL);
1264 return 0;
cfdda9d7
SW		 1265}
1266
be13b2df 1267static void close_complete_upcall(struct c4iw_ep *ep, int status)
cfdda9d7
SW		 1268{
1269 struct iw_cm_event event;
1270
548ddb19 1271 pr_debug("ep %p tid %u\n", ep, ep->hwtid);
cfdda9d7
SW		 1272 memset(&event, 0, sizeof(event));
1273 event.event = IW_CM_EVENT_CLOSE;
be13b2df 1274 event.status = status;
cfdda9d7 1275 if (ep->com.cm_id) {
a9a42886
JP		 1276 pr_debug("close complete delivered ep %p cm_id %p tid %u\n",
1277 ep, ep->com.cm_id, ep->hwtid);
cfdda9d7 1278 ep->com.cm_id->event_handler(ep->com.cm_id, &event);
9ca6f7cf 1279 deref_cm_id(&ep->com);
793dad94 1280 set_bit(CLOSE_UPCALL, &ep->com.history);
cfdda9d7
SW		 1281 }
1282}
1283
cfdda9d7
SW		 1284static void peer_close_upcall(struct c4iw_ep *ep)
1285{
1286 struct iw_cm_event event;
1287
548ddb19 1288 pr_debug("ep %p tid %u\n", ep, ep->hwtid);
cfdda9d7
SW		 1289 memset(&event, 0, sizeof(event));
1290 event.event = IW_CM_EVENT_DISCONNECT;
1291 if (ep->com.cm_id) {
a9a42886
JP		 1292 pr_debug("peer close delivered ep %p cm_id %p tid %u\n",
1293 ep, ep->com.cm_id, ep->hwtid);
cfdda9d7 1294 ep->com.cm_id->event_handler(ep->com.cm_id, &event);
793dad94 1295 set_bit(DISCONN_UPCALL, &ep->com.history);
cfdda9d7
SW		 1296 }
1297}
1298
1299static void peer_abort_upcall(struct c4iw_ep *ep)
1300{
1301 struct iw_cm_event event;
1302
548ddb19 1303 pr_debug("ep %p tid %u\n", ep, ep->hwtid);
cfdda9d7
SW		 1304 memset(&event, 0, sizeof(event));
1305 event.event = IW_CM_EVENT_CLOSE;
1306 event.status = -ECONNRESET;
1307 if (ep->com.cm_id) {
a9a42886
JP		 1308 pr_debug("abort delivered ep %p cm_id %p tid %u\n", ep,
1309 ep->com.cm_id, ep->hwtid);
cfdda9d7 1310 ep->com.cm_id->event_handler(ep->com.cm_id, &event);
9ca6f7cf 1311 deref_cm_id(&ep->com);
793dad94 1312 set_bit(ABORT_UPCALL, &ep->com.history);
cfdda9d7
SW		 1313 }
1314}
1315
1316static void connect_reply_upcall(struct c4iw_ep *ep, int status)
1317{
1318 struct iw_cm_event event;
1319
548ddb19
BP		 1320 pr_debug("ep %p tid %u status %d\n",
1321 ep, ep->hwtid, status);
cfdda9d7
SW		 1322 memset(&event, 0, sizeof(event));
1323 event.event = IW_CM_EVENT_CONNECT_REPLY;
1324 event.status = status;
24d44a39
SW		 1325 memcpy(&event.local_addr, &ep->com.local_addr,
1326 sizeof(ep->com.local_addr));
1327 memcpy(&event.remote_addr, &ep->com.remote_addr,
1328 sizeof(ep->com.remote_addr));
cfdda9d7
SW		 1329
1330 if ((status == 0) || (status == -ECONNREFUSED)) {
d2fe99e8
KS		 1331 if (!ep->tried_with_mpa_v1) {
1332 /* this means MPA_v2 is used */
158c776d
H		 1333 event.ord = ep->ird;
1334 event.ird = ep->ord;
d2fe99e8
KS		 1335 event.private_data_len = ep->plen -
1336 sizeof(struct mpa_v2_conn_params);
1337 event.private_data = ep->mpa_pkt +
1338 sizeof(struct mpa_message) +
1339 sizeof(struct mpa_v2_conn_params);
1340 } else {
1341 /* this means MPA_v1 is used */
158c776d
H		 1342 event.ord = cur_max_read_depth(ep->com.dev);
1343 event.ird = cur_max_read_depth(ep->com.dev);
d2fe99e8
KS		 1344 event.private_data_len = ep->plen;
1345 event.private_data = ep->mpa_pkt +
1346 sizeof(struct mpa_message);
1347 }
cfdda9d7 1348 }
85963e4c 1349
548ddb19 1350 pr_debug("ep %p tid %u status %d\n", ep,
a9a42886 1351 ep->hwtid, status);
793dad94 1352 set_bit(CONN_RPL_UPCALL, &ep->com.history);
85963e4c
RD		 1353 ep->com.cm_id->event_handler(ep->com.cm_id, &event);
1354
9ca6f7cf
H		 1355 if (status < 0)
1356 deref_cm_id(&ep->com);
cfdda9d7
SW		 1357}
1358
be13b2df 1359static int connect_request_upcall(struct c4iw_ep *ep)
cfdda9d7
SW		 1360{
1361 struct iw_cm_event event;
be13b2df 1362 int ret;
cfdda9d7 1363
548ddb19 1364 pr_debug("ep %p tid %u\n", ep, ep->hwtid);
cfdda9d7
SW		 1365 memset(&event, 0, sizeof(event));
1366 event.event = IW_CM_EVENT_CONNECT_REQUEST;
24d44a39
SW		 1367 memcpy(&event.local_addr, &ep->com.local_addr,
1368 sizeof(ep->com.local_addr));
1369 memcpy(&event.remote_addr, &ep->com.remote_addr,
1370 sizeof(ep->com.remote_addr));
cfdda9d7 1371 event.provider_data = ep;
d2fe99e8
KS		 1372 if (!ep->tried_with_mpa_v1) {
1373 /* this means MPA_v2 is used */
1374 event.ord = ep->ord;
1375 event.ird = ep->ird;
1376 event.private_data_len = ep->plen -
1377 sizeof(struct mpa_v2_conn_params);
1378 event.private_data = ep->mpa_pkt + sizeof(struct mpa_message) +
1379 sizeof(struct mpa_v2_conn_params);
1380 } else {
1381 /* this means MPA_v1 is used. Send max supported */
4c2c5763
HS		 1382 event.ord = cur_max_read_depth(ep->com.dev);
1383 event.ird = cur_max_read_depth(ep->com.dev);
d2fe99e8
KS		 1384 event.private_data_len = ep->plen;
1385 event.private_data = ep->mpa_pkt + sizeof(struct mpa_message);
1386 }
be13b2df
SW		 1387 c4iw_get_ep(&ep->com);
1388 ret = ep->parent_ep->com.cm_id->event_handler(ep->parent_ep->com.cm_id,
1389 &event);
1390 if (ret)
1391 c4iw_put_ep(&ep->com);
793dad94 1392 set_bit(CONNREQ_UPCALL, &ep->com.history);
cfdda9d7 1393 c4iw_put_ep(&ep->parent_ep->com);
be13b2df 1394 return ret;
cfdda9d7
SW		 1395}
1396
1397static void established_upcall(struct c4iw_ep *ep)
1398{
1399 struct iw_cm_event event;
1400
548ddb19 1401 pr_debug("ep %p tid %u\n", ep, ep->hwtid);
cfdda9d7
SW		 1402 memset(&event, 0, sizeof(event));
1403 event.event = IW_CM_EVENT_ESTABLISHED;
3dd9a5dc
H		 1404 event.ird = ep->ord;
1405 event.ord = ep->ird;
cfdda9d7 1406 if (ep->com.cm_id) {
548ddb19 1407 pr_debug("ep %p tid %u\n", ep, ep->hwtid);
cfdda9d7 1408 ep->com.cm_id->event_handler(ep->com.cm_id, &event);
793dad94 1409 set_bit(ESTAB_UPCALL, &ep->com.history);
cfdda9d7
SW		 1410 }
1411}
1412
1413static int update_rx_credits(struct c4iw_ep *ep, u32 credits)
1414{
cfdda9d7 1415 struct sk_buff *skb;
6e3b6fc2
VP		 1416 u32 wrlen = roundup(sizeof(struct cpl_rx_data_ack), 16);
1417 u32 credit_dack;
cfdda9d7 1418
548ddb19
BP		 1419 pr_debug("ep %p tid %u credits %u\n",
1420 ep, ep->hwtid, credits);
cfdda9d7
SW		 1421 skb = get_skb(NULL, wrlen, GFP_KERNEL);
1422 if (!skb) {
700456bd 1423 pr_err("update_rx_credits - cannot alloc skb!\n");
cfdda9d7
SW		 1424 return 0;
1425 }
1426
b408ff28
HS		 1427 /*
1428 * If we couldn't specify the entire rcv window at connection setup
1429 * due to the limit in the number of bits in the RCV_BUFSIZ field,
1430 * then add the overage in to the credits returned.
1431 */
d7990b0c
AB		 1432 if (ep->rcv_win > RCV_BUFSIZ_M * 1024)
1433 credits += ep->rcv_win - RCV_BUFSIZ_M * 1024;
b408ff28 1434
6e3b6fc2
VP		 1435 credit_dack = credits | RX_FORCE_ACK_F | RX_DACK_CHANGE_F |
1436 RX_DACK_MODE_V(dack_mode);
1437
1438 cxgb_mk_rx_data_ack(skb, wrlen, ep->hwtid, ep->ctrlq_idx,
1439 credit_dack);
1440
cfdda9d7
SW		 1441 c4iw_ofld_send(&ep->com.dev->rdev, skb);
1442 return credits;
1443}
1444
4c2c5763
HS		 1445#define RELAXED_IRD_NEGOTIATION 1
1446
f8e1e1d1
H		 1447/*
1448 * process_mpa_reply - process streaming mode MPA reply
1449 *
1450 * Returns:
1451 *
1452 * 0 upon success indicating a connect request was delivered to the ULP
1453 * or the mpa request is incomplete but valid so far.
1454 *
1455 * 1 if a failure requires the caller to close the connection.
1456 *
1457 * 2 if a failure requires the caller to abort the connection.
1458 */
cc18b939 1459static int process_mpa_reply(struct c4iw_ep *ep, struct sk_buff *skb)
cfdda9d7
SW		 1460{
1461 struct mpa_message *mpa;
d2fe99e8 1462 struct mpa_v2_conn_params *mpa_v2_params;
cfdda9d7 1463 u16 plen;
d2fe99e8
KS		 1464 u16 resp_ird, resp_ord;
1465 u8 rtr_mismatch = 0, insuff_ird = 0;
cfdda9d7
SW		 1466 struct c4iw_qp_attributes attrs;
1467 enum c4iw_qp_attr_mask mask;
1468 int err;
cc18b939 1469 int disconnect = 0;
cfdda9d7 1470
548ddb19 1471 pr_debug("ep %p tid %u\n", ep, ep->hwtid);
cfdda9d7 1472
cfdda9d7
SW		 1473 /*
1474 * If we get more than the supported amount of private data
1475 * then we must fail this connection.
1476 */
1477 if (ep->mpa_pkt_len + skb->len > sizeof(ep->mpa_pkt)) {
1478 err = -EINVAL;
da1cecdf 1479 goto err_stop_timer;
cfdda9d7
SW		 1480 }
1481
1482 /*
1483 * copy the new data into our accumulation buffer.
1484 */
1485 skb_copy_from_linear_data(skb, &(ep->mpa_pkt[ep->mpa_pkt_len]),
1486 skb->len);
1487 ep->mpa_pkt_len += skb->len;
1488
1489 /*
1490 * if we don't even have the mpa message, then bail.
1491 */
1492 if (ep->mpa_pkt_len < sizeof(*mpa))
cc18b939 1493 return 0;
cfdda9d7
SW		 1494 mpa = (struct mpa_message *) ep->mpa_pkt;
1495
1496 /* Validate MPA header. */
d2fe99e8 1497 if (mpa->revision > mpa_rev) {
700456bd
JP		 1498 pr_err("%s MPA version mismatch. Local = %d, Received = %d\n",
1499 __func__, mpa_rev, mpa->revision);
cfdda9d7 1500 err = -EPROTO;
da1cecdf 1501 goto err_stop_timer;
cfdda9d7
SW		 1502 }
1503 if (memcmp(mpa->key, MPA_KEY_REP, sizeof(mpa->key))) {
1504 err = -EPROTO;
da1cecdf 1505 goto err_stop_timer;
cfdda9d7
SW		 1506 }
1507
1508 plen = ntohs(mpa->private_data_size);
1509
1510 /*
1511 * Fail if there's too much private data.
1512 */
1513 if (plen > MPA_MAX_PRIVATE_DATA) {
1514 err = -EPROTO;
da1cecdf 1515 goto err_stop_timer;
cfdda9d7
SW		 1516 }
1517
1518 /*
1519 * If plen does not account for pkt size
1520 */
1521 if (ep->mpa_pkt_len > (sizeof(*mpa) + plen)) {
1522 err = -EPROTO;
da1cecdf 1523 goto err_stop_timer;
cfdda9d7
SW		 1524 }
1525
1526 ep->plen = (u8) plen;
1527
1528 /*
1529 * If we don't have all the pdata yet, then bail.
1530 * We'll continue process when more data arrives.
1531 */
1532 if (ep->mpa_pkt_len < (sizeof(*mpa) + plen))
cc18b939 1533 return 0;
cfdda9d7
SW		 1534
1535 if (mpa->flags & MPA_REJECT) {
1536 err = -ECONNREFUSED;
da1cecdf 1537 goto err_stop_timer;
cfdda9d7
SW		 1538 }
1539
da1cecdf
H		 1540 /*
1541 * Stop mpa timer. If it expired, then
1542 * we ignore the MPA reply. process_timeout()
1543 * will abort the connection.
1544 */
1545 if (stop_ep_timer(ep))
1546 return 0;
1547
cfdda9d7
SW		 1548 /*
1549 * If we get here we have accumulated the entire mpa
1550 * start reply message including private data. And
1551 * the MPA header is valid.
1552 */
c529fb50 1553 __state_set(&ep->com, FPDU_MODE);
cfdda9d7 1554 ep->mpa_attr.crc_enabled = (mpa->flags & MPA_CRC) | crc_enabled ? 1 : 0;
cfdda9d7 1555 ep->mpa_attr.xmit_marker_enabled = mpa->flags & MPA_MARKERS ? 1 : 0;
d2fe99e8
KS		 1556 ep->mpa_attr.version = mpa->revision;
1557 ep->mpa_attr.p2p_type = FW_RI_INIT_P2PTYPE_DISABLED;
1558
1559 if (mpa->revision == 2) {
1560 ep->mpa_attr.enhanced_rdma_conn =
1561 mpa->flags & MPA_ENHANCED_RDMA_CONN ? 1 : 0;
1562 if (ep->mpa_attr.enhanced_rdma_conn) {
1563 mpa_v2_params = (struct mpa_v2_conn_params *)
1564 (ep->mpa_pkt + sizeof(*mpa));
1565 resp_ird = ntohs(mpa_v2_params->ird) &
1566 MPA_V2_IRD_ORD_MASK;
1567 resp_ord = ntohs(mpa_v2_params->ord) &
1568 MPA_V2_IRD_ORD_MASK;
548ddb19 1569 pr_debug("responder ird %u ord %u ep ird %u ord %u\n",
a9a42886 1570 resp_ird, resp_ord, ep->ird, ep->ord);
d2fe99e8
KS		 1571
1572 /*
1573 * This is a double-check. Ideally, below checks are
1574 * not required since ird/ord stuff has been taken
1575 * care of in c4iw_accept_cr
1576 */
4c2c5763
HS		 1577 if (ep->ird < resp_ord) {
1578 if (RELAXED_IRD_NEGOTIATION && resp_ord <=
1579 ep->com.dev->rdev.lldi.max_ordird_qp)
1580 ep->ird = resp_ord;
1581 else
1582 insuff_ird = 1;
1583 } else if (ep->ird > resp_ord) {
1584 ep->ird = resp_ord;
1585 }
1586 if (ep->ord > resp_ird) {
1587 if (RELAXED_IRD_NEGOTIATION)
1588 ep->ord = resp_ird;
1589 else
1590 insuff_ird = 1;
1591 }
1592 if (insuff_ird) {
d2fe99e8
KS		 1593 err = -ENOMEM;
1594 ep->ird = resp_ord;
1595 ep->ord = resp_ird;
d2fe99e8
KS		 1596 }
1597
1598 if (ntohs(mpa_v2_params->ird) &
1599 MPA_V2_PEER2PEER_MODEL) {
1600 if (ntohs(mpa_v2_params->ord) &
1601 MPA_V2_RDMA_WRITE_RTR)
1602 ep->mpa_attr.p2p_type =
1603 FW_RI_INIT_P2PTYPE_RDMA_WRITE;
1604 else if (ntohs(mpa_v2_params->ord) &
1605 MPA_V2_RDMA_READ_RTR)
1606 ep->mpa_attr.p2p_type =
1607 FW_RI_INIT_P2PTYPE_READ_REQ;
1608 }
1609 }
1610 } else if (mpa->revision == 1)
1611 if (peer2peer)
1612 ep->mpa_attr.p2p_type = p2p_type;
1613
548ddb19
BP		 1614 pr_debug("crc_enabled=%d, recv_marker_enabled=%d, xmit_marker_enabled=%d, version=%d p2p_type=%d local-p2p_type = %d\n",
1615 ep->mpa_attr.crc_enabled,
a9a42886
JP		 1616 ep->mpa_attr.recv_marker_enabled,
1617 ep->mpa_attr.xmit_marker_enabled, ep->mpa_attr.version,
1618 ep->mpa_attr.p2p_type, p2p_type);
d2fe99e8
KS		 1619
1620 /*
1621 * If responder's RTR does not match with that of initiator, assign
1622 * FW_RI_INIT_P2PTYPE_DISABLED in mpa attributes so that RTR is not
1623 * generated when moving QP to RTS state.
1624 * A TERM message will be sent after QP has moved to RTS state
1625 */
91018f86 1626 if ((ep->mpa_attr.version == 2) && peer2peer &&
d2fe99e8
KS		 1627 (ep->mpa_attr.p2p_type != p2p_type)) {
1628 ep->mpa_attr.p2p_type = FW_RI_INIT_P2PTYPE_DISABLED;
1629 rtr_mismatch = 1;
1630 }
cfdda9d7
SW		 1631
1632 attrs.mpa_attr = ep->mpa_attr;
1633 attrs.max_ird = ep->ird;
1634 attrs.max_ord = ep->ord;
1635 attrs.llp_stream_handle = ep;
1636 attrs.next_state = C4IW_QP_STATE_RTS;
1637
1638 mask = C4IW_QP_ATTR_NEXT_STATE |
1639 C4IW_QP_ATTR_LLP_STREAM_HANDLE | C4IW_QP_ATTR_MPA_ATTR |
1640 C4IW_QP_ATTR_MAX_IRD | C4IW_QP_ATTR_MAX_ORD;
1641
1642 /* bind QP and TID with INIT_WR */
1643 err = c4iw_modify_qp(ep->com.qp->rhp,
1644 ep->com.qp, mask, &attrs, 1);
1645 if (err)
1646 goto err;
d2fe99e8
KS		 1647
1648 /*
1649 * If responder's RTR requirement did not match with what initiator
1650 * supports, generate TERM message
1651 */
1652 if (rtr_mismatch) {
700456bd 1653 pr_err("%s: RTR mismatch, sending TERM\n", __func__);
d2fe99e8
KS		 1654 attrs.layer_etype = LAYER_MPA | DDP_LLP;
1655 attrs.ecode = MPA_NOMATCH_RTR;
1656 attrs.next_state = C4IW_QP_STATE_TERMINATE;
cc18b939 1657 attrs.send_term = 1;
d2fe99e8 1658 err = c4iw_modify_qp(ep->com.qp->rhp, ep->com.qp,
cc18b939 1659 C4IW_QP_ATTR_NEXT_STATE, &attrs, 1);
d2fe99e8 1660 err = -ENOMEM;
cc18b939 1661 disconnect = 1;
d2fe99e8
KS		 1662 goto out;
1663 }
1664
1665 /*
1666 * Generate TERM if initiator IRD is not sufficient for responder
1667 * provided ORD. Currently, we do the same behaviour even when
1668 * responder provided IRD is also not sufficient as regards to
1669 * initiator ORD.
1670 */
1671 if (insuff_ird) {
700456bd 1672 pr_err("%s: Insufficient IRD, sending TERM\n", __func__);
d2fe99e8
KS		 1673 attrs.layer_etype = LAYER_MPA | DDP_LLP;
1674 attrs.ecode = MPA_INSUFF_IRD;
1675 attrs.next_state = C4IW_QP_STATE_TERMINATE;
cc18b939 1676 attrs.send_term = 1;
d2fe99e8 1677 err = c4iw_modify_qp(ep->com.qp->rhp, ep->com.qp,
cc18b939 1678 C4IW_QP_ATTR_NEXT_STATE, &attrs, 1);
d2fe99e8 1679 err = -ENOMEM;
cc18b939 1680 disconnect = 1;
d2fe99e8
KS		 1681 goto out;
1682 }
cfdda9d7 1683 goto out;
da1cecdf
H		 1684err_stop_timer:
1685 stop_ep_timer(ep);
cfdda9d7 1686err:
f8e1e1d1 1687 disconnect = 2;
cfdda9d7
SW		 1688out:
1689 connect_reply_upcall(ep, err);
cc18b939 1690 return disconnect;
cfdda9d7
SW		 1691}
1692
fd6aabe4
H		 1693/*
1694 * process_mpa_request - process streaming mode MPA request
1695 *
1696 * Returns:
1697 *
1698 * 0 upon success indicating a connect request was delivered to the ULP
1699 * or the mpa request is incomplete but valid so far.
1700 *
1701 * 1 if a failure requires the caller to close the connection.
1702 *
1703 * 2 if a failure requires the caller to abort the connection.
1704 */
1705static int process_mpa_request(struct c4iw_ep *ep, struct sk_buff *skb)
cfdda9d7
SW		 1706{
1707 struct mpa_message *mpa;
d2fe99e8 1708 struct mpa_v2_conn_params *mpa_v2_params;
cfdda9d7
SW		 1709 u16 plen;
1710
548ddb19 1711 pr_debug("ep %p tid %u\n", ep, ep->hwtid);
cfdda9d7 1712
cfdda9d7
SW		 1713 /*
1714 * If we get more than the supported amount of private data
1715 * then we must fail this connection.
1716 */
fd6aabe4
H		 1717 if (ep->mpa_pkt_len + skb->len > sizeof(ep->mpa_pkt))
1718 goto err_stop_timer;
cfdda9d7 1719
548ddb19 1720 pr_debug("enter (%s line %u)\n", __FILE__, __LINE__);
cfdda9d7
SW		 1721
1722 /*
1723 * Copy the new data into our accumulation buffer.
1724 */
1725 skb_copy_from_linear_data(skb, &(ep->mpa_pkt[ep->mpa_pkt_len]),
1726 skb->len);
1727 ep->mpa_pkt_len += skb->len;
1728
1729 /*
1730 * If we don't even have the mpa message, then bail.
1731 * We'll continue process when more data arrives.
1732 */
1733 if (ep->mpa_pkt_len < sizeof(*mpa))
fd6aabe4 1734 return 0;
cfdda9d7 1735
548ddb19 1736 pr_debug("enter (%s line %u)\n", __FILE__, __LINE__);
cfdda9d7
SW		 1737 mpa = (struct mpa_message *) ep->mpa_pkt;
1738
1739 /*
1740 * Validate MPA Header.
1741 */
d2fe99e8 1742 if (mpa->revision > mpa_rev) {
700456bd
JP		 1743 pr_err("%s MPA version mismatch. Local = %d, Received = %d\n",
1744 __func__, mpa_rev, mpa->revision);
fd6aabe4 1745 goto err_stop_timer;
cfdda9d7
SW		 1746 }
1747
fd6aabe4
H		 1748 if (memcmp(mpa->key, MPA_KEY_REQ, sizeof(mpa->key)))
1749 goto err_stop_timer;
cfdda9d7
SW		 1750
1751 plen = ntohs(mpa->private_data_size);
1752
1753 /*
1754 * Fail if there's too much private data.
1755 */
fd6aabe4
H		 1756 if (plen > MPA_MAX_PRIVATE_DATA)
1757 goto err_stop_timer;
cfdda9d7
SW		 1758
1759 /*
1760 * If plen does not account for pkt size
1761 */
fd6aabe4
H		 1762 if (ep->mpa_pkt_len > (sizeof(*mpa) + plen))
1763 goto err_stop_timer;
cfdda9d7
SW		 1764 ep->plen = (u8) plen;
1765
1766 /*
1767 * If we don't have all the pdata yet, then bail.
1768 */
1769 if (ep->mpa_pkt_len < (sizeof(*mpa) + plen))
fd6aabe4 1770 return 0;
cfdda9d7
SW		 1771
1772 /*
1773 * If we get here we have accumulated the entire mpa
1774 * start reply message including private data.
1775 */
1776 ep->mpa_attr.initiator = 0;
1777 ep->mpa_attr.crc_enabled = (mpa->flags & MPA_CRC) | crc_enabled ? 1 : 0;
1778 ep->mpa_attr.recv_marker_enabled = markers_enabled;
1779 ep->mpa_attr.xmit_marker_enabled = mpa->flags & MPA_MARKERS ? 1 : 0;
d2fe99e8
KS		 1780 ep->mpa_attr.version = mpa->revision;
1781 if (mpa->revision == 1)
1782 ep->tried_with_mpa_v1 = 1;
1783 ep->mpa_attr.p2p_type = FW_RI_INIT_P2PTYPE_DISABLED;
1784
1785 if (mpa->revision == 2) {
1786 ep->mpa_attr.enhanced_rdma_conn =
1787 mpa->flags & MPA_ENHANCED_RDMA_CONN ? 1 : 0;
1788 if (ep->mpa_attr.enhanced_rdma_conn) {
1789 mpa_v2_params = (struct mpa_v2_conn_params *)
1790 (ep->mpa_pkt + sizeof(*mpa));
1791 ep->ird = ntohs(mpa_v2_params->ird) &
1792 MPA_V2_IRD_ORD_MASK;
7f446abf
SW		 1793 ep->ird = min_t(u32, ep->ird,
1794 cur_max_read_depth(ep->com.dev));
d2fe99e8
KS		 1795 ep->ord = ntohs(mpa_v2_params->ord) &
1796 MPA_V2_IRD_ORD_MASK;
7f446abf
SW		 1797 ep->ord = min_t(u32, ep->ord,
1798 cur_max_read_depth(ep->com.dev));
548ddb19
BP		 1799 pr_debug("initiator ird %u ord %u\n",
1800 ep->ird, ep->ord);
d2fe99e8
KS		 1801 if (ntohs(mpa_v2_params->ird) & MPA_V2_PEER2PEER_MODEL)
1802 if (peer2peer) {
1803 if (ntohs(mpa_v2_params->ord) &
1804 MPA_V2_RDMA_WRITE_RTR)
1805 ep->mpa_attr.p2p_type =
1806 FW_RI_INIT_P2PTYPE_RDMA_WRITE;
1807 else if (ntohs(mpa_v2_params->ord) &
1808 MPA_V2_RDMA_READ_RTR)
1809 ep->mpa_attr.p2p_type =
1810 FW_RI_INIT_P2PTYPE_READ_REQ;
1811 }
1812 }
1813 } else if (mpa->revision == 1)
1814 if (peer2peer)
1815 ep->mpa_attr.p2p_type = p2p_type;
1816
548ddb19 1817 pr_debug("crc_enabled=%d, recv_marker_enabled=%d, xmit_marker_enabled=%d, version=%d p2p_type=%d\n",
a9a42886
JP		 1818 ep->mpa_attr.crc_enabled, ep->mpa_attr.recv_marker_enabled,
1819 ep->mpa_attr.xmit_marker_enabled, ep->mpa_attr.version,
1820 ep->mpa_attr.p2p_type);
cfdda9d7 1821
e4b76a2a
H		 1822 __state_set(&ep->com, MPA_REQ_RCVD);
1823
1824 /* drive upcall */
1825 mutex_lock_nested(&ep->parent_ep->com.mutex, SINGLE_DEPTH_NESTING);
1826 if (ep->parent_ep->com.state != DEAD) {
1827 if (connect_request_upcall(ep))
fd6aabe4 1828 goto err_unlock_parent;
e4b76a2a
H		 1829 } else {
1830 goto err_unlock_parent;
be13b2df 1831 }
e4b76a2a 1832 mutex_unlock(&ep->parent_ep->com.mutex);
fd6aabe4
H		 1833 return 0;
1834
1835err_unlock_parent:
1836 mutex_unlock(&ep->parent_ep->com.mutex);
1837 goto err_out;
1838err_stop_timer:
1839 (void)stop_ep_timer(ep);
1840err_out:
1841 return 2;
cfdda9d7
SW		 1842}
1843
1844static int rx_data(struct c4iw_dev *dev, struct sk_buff *skb)
1845{
1846 struct c4iw_ep *ep;
1847 struct cpl_rx_data *hdr = cplhdr(skb);
1848 unsigned int dlen = ntohs(hdr->len);
1849 unsigned int tid = GET_TID(hdr);
793dad94 1850 __u8 status = hdr->status;
cc18b939 1851 int disconnect = 0;
cfdda9d7 1852
944661dd 1853 ep = get_ep_from_tid(dev, tid);
977116c6
SW		 1854 if (!ep)
1855 return 0;
548ddb19 1856 pr_debug("ep %p tid %u dlen %u\n", ep, ep->hwtid, dlen);
cfdda9d7
SW		 1857 skb_pull(skb, sizeof(*hdr));
1858 skb_trim(skb, dlen);
c529fb50 1859 mutex_lock(&ep->com.mutex);
cfdda9d7 1860
c529fb50 1861 switch (ep->com.state) {
cfdda9d7 1862 case MPA_REQ_SENT:
3bcf96e0 1863 update_rx_credits(ep, dlen);
55abf8df 1864 ep->rcv_seq += dlen;
cc18b939 1865 disconnect = process_mpa_reply(ep, skb);
cfdda9d7
SW		 1866 break;
1867 case MPA_REQ_WAIT:
3bcf96e0 1868 update_rx_credits(ep, dlen);
55abf8df 1869 ep->rcv_seq += dlen;
4a4dd8db 1870 disconnect = process_mpa_request(ep, skb);
cfdda9d7 1871 break;
1557967b
VP		 1872 case FPDU_MODE: {
1873 struct c4iw_qp_attributes attrs;
3bcf96e0
SW		 1874
1875 update_rx_credits(ep, dlen);
e8e5b927 1876 if (status)
1557967b 1877 pr_err("%s Unexpected streaming data." \
04236df2
VP		 1878 " qpid %u ep %p state %d tid %u status %d\n",
1879 __func__, ep->com.qp->wq.sq.qid, ep,
c529fb50 1880 ep->com.state, ep->hwtid, status);
97d7ec0c 1881 attrs.next_state = C4IW_QP_STATE_TERMINATE;
1557967b 1882 c4iw_modify_qp(ep->com.qp->rhp, ep->com.qp,
cc18b939
SW		 1883 C4IW_QP_ATTR_NEXT_STATE, &attrs, 1);
1884 disconnect = 1;
cfdda9d7
SW		 1885 break;
1886 }
1557967b
VP		 1887 default:
1888 break;
1889 }
c529fb50 1890 mutex_unlock(&ep->com.mutex);
cc18b939 1891 if (disconnect)
4a4dd8db 1892 c4iw_ep_disconnect(ep, disconnect == 2, GFP_KERNEL);
944661dd 1893 c4iw_put_ep(&ep->com);
cfdda9d7
SW		 1894 return 0;
1895}
1896
11a27e21 1897static void complete_cached_srq_buffers(struct c4iw_ep *ep, u32 srqidx)
6a0b6174
RR		 1898{
1899 enum chip_type adapter_type;
6a0b6174
RR		 1900
1901 adapter_type = ep->com.dev->rdev.lldi.adapter_type;
6a0b6174
RR		 1902
1903 /*
1904 * If this TCB had a srq buffer cached, then we must complete
1905 * it. For user mode, that means saving the srqidx in the
1906 * user/kernel status page for this qp. For kernel mode, just
1907 * synthesize the CQE now.
1908 */
1909 if (CHELSIO_CHIP_VERSION(adapter_type) > CHELSIO_T5 && srqidx) {
1910 if (ep->com.qp->ibqp.uobject)
1911 t4_set_wq_in_error(&ep->com.qp->wq, srqidx);
1912 else
1913 c4iw_flush_srqidx(ep->com.qp, srqidx);
1914 }
1915}
1916
cfdda9d7
SW		 1917static int abort_rpl(struct c4iw_dev *dev, struct sk_buff *skb)
1918{
11a27e21 1919 u32 srqidx;
cfdda9d7 1920 struct c4iw_ep *ep;
6a0b6174 1921 struct cpl_abort_rpl_rss6 *rpl = cplhdr(skb);
cfdda9d7
SW		 1922 int release = 0;
1923 unsigned int tid = GET_TID(rpl);
cfdda9d7 1924
944661dd 1925 ep = get_ep_from_tid(dev, tid);
4984037b 1926 if (!ep) {
700456bd 1927 pr_warn("Abort rpl to freed endpoint\n");
4984037b
VP		 1928 return 0;
1929 }
6a0b6174 1930
11a27e21
RR		 1931 if (ep->com.qp && ep->com.qp->srq) {
1932 srqidx = ABORT_RSS_SRQIDX_G(be32_to_cpu(rpl->srqidx_status));
1933 complete_cached_srq_buffers(ep, srqidx ? srqidx : ep->srqe_idx);
1934 }
6a0b6174 1935
548ddb19 1936 pr_debug("ep %p tid %u\n", ep, ep->hwtid);
2f5b48c3 1937 mutex_lock(&ep->com.mutex);
cfdda9d7
SW		 1938 switch (ep->com.state) {
1939 case ABORTING:
2015f26c 1940 c4iw_wake_up_noref(ep->com.wr_waitp, -ECONNRESET);
cfdda9d7
SW		 1941 __state_set(&ep->com, DEAD);
1942 release = 1;
1943 break;
1944 default:
700456bd 1945 pr_err("%s ep %p state %d\n", __func__, ep, ep->com.state);
cfdda9d7
SW		 1946 break;
1947 }
2f5b48c3 1948 mutex_unlock(&ep->com.mutex);
cfdda9d7 1949
f368ff18
RR		 1950 if (release) {
1951 close_complete_upcall(ep, -ECONNRESET);
cfdda9d7 1952 release_ep_resources(ep);
f368ff18 1953 }
944661dd 1954 c4iw_put_ep(&ep->com);
cfdda9d7
SW		 1955 return 0;
1956}
1957
caa6c9f2 1958static int send_fw_act_open_req(struct c4iw_ep *ep, unsigned int atid)
5be78ee9
VP		 1959{
1960 struct sk_buff *skb;
1961 struct fw_ofld_connection_wr *req;
1962 unsigned int mtu_idx;
cc516700 1963 u32 wscale;
830662f6 1964 struct sockaddr_in *sin;
b408ff28 1965 int win;
5be78ee9
VP		 1966
1967 skb = get_skb(NULL, sizeof(*req), GFP_KERNEL);
de77b966 1968 req = __skb_put_zero(skb, sizeof(*req));
6c53e938 1969 req->op_compl = htonl(WR_OP_V(FW_OFLD_CONNECTION_WR));
e2ac9628 1970 req->len16_pkd = htonl(FW_WR_LEN16_V(DIV_ROUND_UP(sizeof(*req), 16)));
41b4f86c
KS		 1971 req->le.filter = cpu_to_be32(cxgb4_select_ntuple(
1972 ep->com.dev->rdev.lldi.ports[0],
5be78ee9 1973 ep->l2t));
170003c8 1974 sin = (struct sockaddr_in *)&ep->com.local_addr;
830662f6
VP		 1975 req->le.lport = sin->sin_port;
1976 req->le.u.ipv4.lip = sin->sin_addr.s_addr;
170003c8 1977 sin = (struct sockaddr_in *)&ep->com.remote_addr;
830662f6
VP		 1978 req->le.pport = sin->sin_port;
1979 req->le.u.ipv4.pip = sin->sin_addr.s_addr;
5be78ee9 1980 req->tcb.t_state_to_astid =
77a80e23
HS		 1981 htonl(FW_OFLD_CONNECTION_WR_T_STATE_V(TCP_SYN_SENT) |
1982 FW_OFLD_CONNECTION_WR_ASTID_V(atid));
5be78ee9 1983 req->tcb.cplrxdataack_cplpassacceptrpl =
77a80e23 1984 htons(FW_OFLD_CONNECTION_WR_CPLRXDATAACK_F);
ef5d6355 1985 req->tcb.tx_max = (__force __be32) jiffies;
793dad94 1986 req->tcb.rcv_adv = htons(1);
44c6d069
VP		 1987 cxgb_best_mtu(ep->com.dev->rdev.lldi.mtus, ep->mtu, &mtu_idx,
1988 enable_tcp_timestamps,
1989 (ep->com.remote_addr.ss_family == AF_INET) ? 0 : 1);
cc516700 1990 wscale = cxgb_compute_wscale(rcv_win);
b408ff28
HS		 1991
1992 /*
1993 * Specify the largest window that will fit in opt0. The
1994 * remainder will be specified in the rx_data_ack.
1995 */
1996 win = ep->rcv_win >> 10;
d7990b0c
AB		 1997 if (win > RCV_BUFSIZ_M)
1998 win = RCV_BUFSIZ_M;
b408ff28 1999
6c53e938
HS		 2000 req->tcb.opt0 = (__force __be64) (TCAM_BYPASS_F |
2001 (nocong ? NO_CONG_F : 0) |
d7990b0c 2002 KEEP_ALIVE_F |
6c53e938 2003 DELACK_F |
d7990b0c
AB		 2004 WND_SCALE_V(wscale) |
2005 MSS_IDX_V(mtu_idx) |
2006 L2T_IDX_V(ep->l2t->idx) |
2007 TX_CHAN_V(ep->tx_chan) |
2008 SMAC_SEL_V(ep->smac_idx) |
ac8e4c69 2009 DSCP_V(ep->tos >> 2) |
d7990b0c
AB		 2010 ULP_MODE_V(ULP_MODE_TCPDDP) |
2011 RCV_BUFSIZ_V(win));
6c53e938
HS		 2012 req->tcb.opt2 = (__force __be32) (PACE_V(1) |
2013 TX_QUEUE_V(ep->com.dev->rdev.lldi.tx_modq[ep->tx_chan]) |
d7990b0c 2014 RX_CHANNEL_V(0) |
6c53e938 2015 CCTRL_ECN_V(enable_ecn) |
d7990b0c 2016 RSS_QUEUE_VALID_F | RSS_QUEUE_V(ep->rss_qid));
5be78ee9 2017 if (enable_tcp_timestamps)
6c53e938 2018 req->tcb.opt2 |= (__force __be32)TSTAMPS_EN_F;
5be78ee9 2019 if (enable_tcp_sack)
6c53e938 2020 req->tcb.opt2 |= (__force __be32)SACK_EN_F;
5be78ee9 2021 if (wscale && enable_tcp_window_scaling)
d7990b0c
AB		 2022 req->tcb.opt2 |= (__force __be32)WND_SCALE_EN_F;
2023 req->tcb.opt0 = cpu_to_be64((__force u64)req->tcb.opt0);
2024 req->tcb.opt2 = cpu_to_be32((__force u32)req->tcb.opt2);
793dad94
VP		 2025 set_wr_txq(skb, CPL_PRIORITY_CONTROL, ep->ctrlq_idx);
2026 set_bit(ACT_OFLD_CONN, &ep->com.history);
caa6c9f2 2027 return c4iw_l2t_send(&ep->com.dev->rdev, skb, ep->l2t);
5be78ee9
VP		 2028}
2029
cfdda9d7 2030/*
4c72efef
H		 2031 * Some of the error codes above implicitly indicate that there is no TID
2032 * allocated with the result of an ACT_OPEN. We use this predicate to make
2033 * that explicit.
cfdda9d7
SW		 2034 */
2035static inline int act_open_has_tid(int status)
2036{
4c72efef
H		 2037 return (status != CPL_ERR_TCAM_PARITY &&
2038 status != CPL_ERR_TCAM_MISS &&
2039 status != CPL_ERR_TCAM_FULL &&
2040 status != CPL_ERR_CONN_EXIST_SYNRECV &&
2041 status != CPL_ERR_CONN_EXIST);
cfdda9d7
SW		 2042}
2043
dd92b124
HS		 2044static char *neg_adv_str(unsigned int status)
2045{
2046 switch (status) {
2047 case CPL_ERR_RTX_NEG_ADVICE:
2048 return "Retransmit timeout";
2049 case CPL_ERR_PERSIST_NEG_ADVICE:
2050 return "Persist timeout";
2051 case CPL_ERR_KEEPALV_NEG_ADVICE:
2052 return "Keepalive timeout";
2053 default:
2054 return "Unknown";
2055 }
2056}
2057
b408ff28
HS		 2058static void set_tcp_window(struct c4iw_ep *ep, struct port_info *pi)
2059{
2060 ep->snd_win = snd_win;
2061 ep->rcv_win = rcv_win;
548ddb19
BP		 2062 pr_debug("snd_win %d rcv_win %d\n",
2063 ep->snd_win, ep->rcv_win);
b408ff28
HS		 2064}
2065
793dad94
VP		 2066#define ACT_OPEN_RETRY_COUNT 2
2067
830662f6
VP		 2068static int import_ep(struct c4iw_ep *ep, int iptype, __u8 *peer_ip,
2069 struct dst_entry *dst, struct c4iw_dev *cdev,
ac8e4c69 2070 bool clear_mpa_v1, enum chip_type adapter_type, u8 tos)
830662f6
VP		 2071{
2072 struct neighbour *n;
2073 int err, step;
2074 struct net_device *pdev;
2075
2076 n = dst_neigh_lookup(dst, peer_ip);
2077 if (!n)
2078 return -ENODEV;
2079
2080 rcu_read_lock();
2081 err = -ENOMEM;
2082 if (n->dev->flags & IFF_LOOPBACK) {
2083 if (iptype == 4)
2084 pdev = ip_dev_find(&init_net, *(__be32 *)peer_ip);
2085 else if (IS_ENABLED(CONFIG_IPV6))
2086 for_each_netdev(&init_net, pdev) {
2087 if (ipv6_chk_addr(&init_net,
2088 (struct in6_addr *)peer_ip,
2089 pdev, 1))
2090 break;
2091 }
2092 else
2093 pdev = NULL;
2094
2095 if (!pdev) {
2096 err = -ENODEV;
2097 goto out;
2098 }
2099 ep->l2t = cxgb4_l2t_get(cdev->rdev.lldi.l2t,
ac8e4c69 2100 n, pdev, rt_tos2priority(tos));
609e941a
SW		 2101 if (!ep->l2t) {
2102 dev_put(pdev);
830662f6 2103 goto out;
609e941a 2104 }
830662f6
VP		 2105 ep->mtu = pdev->mtu;
2106 ep->tx_chan = cxgb4_port_chan(pdev);
02d805dc 2107 ep->smac_idx = ((struct port_info *)netdev_priv(pdev))->smt_idx;
830662f6
VP		 2108 step = cdev->rdev.lldi.ntxq /
2109 cdev->rdev.lldi.nchan;
2110 ep->txq_idx = cxgb4_port_idx(pdev) * step;
2111 step = cdev->rdev.lldi.nrxq /
2112 cdev->rdev.lldi.nchan;
2113 ep->ctrlq_idx = cxgb4_port_idx(pdev);
2114 ep->rss_qid = cdev->rdev.lldi.rxq_ids[
2115 cxgb4_port_idx(pdev) * step];
b408ff28 2116 set_tcp_window(ep, (struct port_info *)netdev_priv(pdev));
830662f6
VP		 2117 dev_put(pdev);
2118 } else {
2119 pdev = get_real_dev(n->dev);
2120 ep->l2t = cxgb4_l2t_get(cdev->rdev.lldi.l2t,
cb3ba0bd 2121 n, pdev, rt_tos2priority(tos));
830662f6
VP		 2122 if (!ep->l2t)
2123 goto out;
2124 ep->mtu = dst_mtu(dst);
11b8e22d 2125 ep->tx_chan = cxgb4_port_chan(pdev);
02d805dc 2126 ep->smac_idx = ((struct port_info *)netdev_priv(pdev))->smt_idx;
830662f6
VP		 2127 step = cdev->rdev.lldi.ntxq /
2128 cdev->rdev.lldi.nchan;
11b8e22d
SW		 2129 ep->txq_idx = cxgb4_port_idx(pdev) * step;
2130 ep->ctrlq_idx = cxgb4_port_idx(pdev);
830662f6
VP		 2131 step = cdev->rdev.lldi.nrxq /
2132 cdev->rdev.lldi.nchan;
2133 ep->rss_qid = cdev->rdev.lldi.rxq_ids[
11b8e22d 2134 cxgb4_port_idx(pdev) * step];
b408ff28 2135 set_tcp_window(ep, (struct port_info *)netdev_priv(pdev));
830662f6
VP		 2136
2137 if (clear_mpa_v1) {
2138 ep->retry_with_mpa_v1 = 0;
2139 ep->tried_with_mpa_v1 = 0;
2140 }
2141 }
2142 err = 0;
2143out:
2144 rcu_read_unlock();
2145
2146 neigh_release(n);
2147
2148 return err;
2149}
2150
793dad94
VP		 2151static int c4iw_reconnect(struct c4iw_ep *ep)
2152{
2153 int err = 0;
4a740838 2154 int size = 0;
24d44a39 2155 struct sockaddr_in *laddr = (struct sockaddr_in *)
170003c8 2156 &ep->com.cm_id->m_local_addr;
24d44a39 2157 struct sockaddr_in *raddr = (struct sockaddr_in *)
170003c8 2158 &ep->com.cm_id->m_remote_addr;
830662f6 2159 struct sockaddr_in6 *laddr6 = (struct sockaddr_in6 *)
170003c8 2160 &ep->com.cm_id->m_local_addr;
830662f6 2161 struct sockaddr_in6 *raddr6 = (struct sockaddr_in6 *)
170003c8 2162 &ep->com.cm_id->m_remote_addr;
830662f6
VP		 2163 int iptype;
2164 __u8 *ra;
793dad94 2165
548ddb19 2166 pr_debug("qp %p cm_id %p\n", ep->com.qp, ep->com.cm_id);
ef885dc6 2167 c4iw_init_wr_wait(ep->com.wr_waitp);
793dad94 2168
4a740838
H		 2169 /* When MPA revision is different on nodes, the node with MPA_rev=2
2170 * tries to reconnect with MPA_rev 1 for the same EP through
2171 * c4iw_reconnect(), where the same EP is assigned with new tid for
2172 * further connection establishment. As we are using the same EP pointer
2173 * for reconnect, few skbs are used during the previous c4iw_connect(),
2174 * which leaves the EP with inadequate skbs for further
ba97b749 2175 * c4iw_reconnect(), Further causing a crash due to an empty
4a740838
H		 2176 * skb_list() during peer_abort(). Allocate skbs which is already used.
2177 */
2178 size = (CN_MAX_CON_BUF - skb_queue_len(&ep->com.ep_skb_list));
2179 if (alloc_ep_skb_list(&ep->com.ep_skb_list, size)) {
2180 err = -ENOMEM;
2181 goto fail1;
2182 }
2183
793dad94
VP		 2184 /*
2185 * Allocate an active TID to initiate a TCP connection.
2186 */
2187 ep->atid = cxgb4_alloc_atid(ep->com.dev->rdev.lldi.tids, ep);
2188 if (ep->atid == -1) {
700456bd 2189 pr_err("%s - cannot alloc atid\n", __func__);
793dad94
VP		 2190 err = -ENOMEM;
2191 goto fail2;
2192 }
9f5a9632
MW		 2193 err = xa_insert_irq(&ep->com.dev->atids, ep->atid, ep, GFP_KERNEL);
2194 if (err)
2195 goto fail2a;
793dad94
VP		 2196
2197 /* find a route */
170003c8 2198 if (ep->com.cm_id->m_local_addr.ss_family == AF_INET) {
804c2f3e
VP		 2199 ep->dst = cxgb_find_route(&ep->com.dev->rdev.lldi, get_real_dev,
2200 laddr->sin_addr.s_addr,
2201 raddr->sin_addr.s_addr,
2202 laddr->sin_port,
2203 raddr->sin_port, ep->com.cm_id->tos);
830662f6
VP		 2204 iptype = 4;
2205 ra = (__u8 *)&raddr->sin_addr;
2206 } else {
95554761
VP		 2207 ep->dst = cxgb_find_route6(&ep->com.dev->rdev.lldi,
2208 get_real_dev,
2209 laddr6->sin6_addr.s6_addr,
2210 raddr6->sin6_addr.s6_addr,
2211 laddr6->sin6_port,
c8a7eb55
SW		 2212 raddr6->sin6_port,
2213 ep->com.cm_id->tos,
95554761 2214 raddr6->sin6_scope_id);
830662f6
VP		 2215 iptype = 6;
2216 ra = (__u8 *)&raddr6->sin6_addr;
2217 }
2218 if (!ep->dst) {
700456bd 2219 pr_err("%s - cannot find route\n", __func__);
793dad94
VP		 2220 err = -EHOSTUNREACH;
2221 goto fail3;
2222 }
963cab50 2223 err = import_ep(ep, iptype, ra, ep->dst, ep->com.dev, false,
ac8e4c69
H		 2224 ep->com.dev->rdev.lldi.adapter_type,
2225 ep->com.cm_id->tos);
830662f6 2226 if (err) {
700456bd 2227 pr_err("%s - cannot alloc l2e\n", __func__);
793dad94
VP		 2228 goto fail4;
2229 }
2230
548ddb19
BP		 2231 pr_debug("txq_idx %u tx_chan %u smac_idx %u rss_qid %u l2t_idx %u\n",
2232 ep->txq_idx, ep->tx_chan, ep->smac_idx, ep->rss_qid,
a9a42886 2233 ep->l2t->idx);
793dad94
VP		 2234
2235 state_set(&ep->com, CONNECTING);
ac8e4c69 2236 ep->tos = ep->com.cm_id->tos;
793dad94
VP		 2237
2238 /* send connect request to rnic */
2239 err = send_connect(ep);
2240 if (!err)
2241 goto out;
2242
2243 cxgb4_l2t_release(ep->l2t);
2244fail4:
2245 dst_release(ep->dst);
2246fail3:
9f5a9632
MW		 2247 xa_erase_irq(&ep->com.dev->atids, ep->atid);
2248fail2a:
793dad94
VP		 2249 cxgb4_free_atid(ep->com.dev->rdev.lldi.tids, ep->atid);
2250fail2:
2251 /*
2252 * remember to send notification to upper layer.
2253 * We are in here so the upper layer is not aware that this is
2254 * re-connect attempt and so, upper layer is still waiting for
2255 * response of 1st connect request.
2256 */
2257 connect_reply_upcall(ep, -ECONNRESET);
4a740838 2258fail1:
793dad94
VP		 2259 c4iw_put_ep(&ep->com);
2260out:
2261 return err;
2262}
2263
cfdda9d7
SW		 2264static int act_open_rpl(struct c4iw_dev *dev, struct sk_buff *skb)
2265{
2266 struct c4iw_ep *ep;
2267 struct cpl_act_open_rpl *rpl = cplhdr(skb);
6c53e938
HS		 2268 unsigned int atid = TID_TID_G(AOPEN_ATID_G(
2269 ntohl(rpl->atid_status)));
cfdda9d7 2270 struct tid_info *t = dev->rdev.lldi.tids;
6c53e938 2271 int status = AOPEN_STATUS_G(ntohl(rpl->atid_status));
830662f6
VP		 2272 struct sockaddr_in *la;
2273 struct sockaddr_in *ra;
2274 struct sockaddr_in6 *la6;
2275 struct sockaddr_in6 *ra6;
caa6c9f2 2276 int ret = 0;
cfdda9d7
SW		 2277
2278 ep = lookup_atid(t, atid);
170003c8
SW		 2279 la = (struct sockaddr_in *)&ep->com.local_addr;
2280 ra = (struct sockaddr_in *)&ep->com.remote_addr;
2281 la6 = (struct sockaddr_in6 *)&ep->com.local_addr;
2282 ra6 = (struct sockaddr_in6 *)&ep->com.remote_addr;
cfdda9d7 2283
548ddb19 2284 pr_debug("ep %p atid %u status %u errno %d\n", ep, atid,
a9a42886 2285 status, status2errno(status));
cfdda9d7 2286
b65eef0a 2287 if (cxgb_is_neg_adv(status)) {
548ddb19
BP		 2288 pr_debug("Connection problems for atid %u status %u (%s)\n",
2289 atid, status, neg_adv_str(status));
179d03bb
H		 2290 ep->stats.connect_neg_adv++;
2291 mutex_lock(&dev->rdev.stats.lock);
2292 dev->rdev.stats.neg_adv++;
2293 mutex_unlock(&dev->rdev.stats.lock);
cfdda9d7
SW		 2294 return 0;
2295 }
2296
793dad94
VP		 2297 set_bit(ACT_OPEN_RPL, &ep->com.history);
2298
d716a2a0
VP		 2299 /*
2300 * Log interesting failures.
2301 */
2302 switch (status) {
2303 case CPL_ERR_CONN_RESET:
2304 case CPL_ERR_CONN_TIMEDOUT:
2305 break;
5be78ee9 2306 case CPL_ERR_TCAM_FULL:
830662f6 2307 mutex_lock(&dev->rdev.stats.lock);
3b174d94 2308 dev->rdev.stats.tcam_full++;
830662f6
VP		 2309 mutex_unlock(&dev->rdev.stats.lock);
2310 if (ep->com.local_addr.ss_family == AF_INET &&
2311 dev->rdev.lldi.enable_fw_ofld_conn) {
caa6c9f2
H		 2312 ret = send_fw_act_open_req(ep, TID_TID_G(AOPEN_ATID_G(
2313 ntohl(rpl->atid_status))));
2314 if (ret)
2315 goto fail;
793dad94
VP		 2316 return 0;
2317 }
2318 break;
2319 case CPL_ERR_CONN_EXIST:
2320 if (ep->retry_count++ < ACT_OPEN_RETRY_COUNT) {
2321 set_bit(ACT_RETRY_INUSE, &ep->com.history);
84cc6ac6
H		 2322 if (ep->com.remote_addr.ss_family == AF_INET6) {
2323 struct sockaddr_in6 *sin6 =
2324 (struct sockaddr_in6 *)
170003c8 2325 &ep->com.local_addr;
84cc6ac6
H		 2326 cxgb4_clip_release(
2327 ep->com.dev->rdev.lldi.ports[0],
2328 (const u32 *)
2329 &sin6->sin6_addr.s6_addr, 1);
2330 }
9f5a9632 2331 xa_erase_irq(&ep->com.dev->atids, atid);
793dad94
VP		 2332 cxgb4_free_atid(t, atid);
2333 dst_release(ep->dst);
2334 cxgb4_l2t_release(ep->l2t);
2335 c4iw_reconnect(ep);
2336 return 0;
2337 }
5be78ee9 2338 break;
d716a2a0 2339 default:
830662f6
VP		 2340 if (ep->com.local_addr.ss_family == AF_INET) {
2341 pr_info("Active open failure - atid %u status %u errno %d %pI4:%u->%pI4:%u\n",
2342 atid, status, status2errno(status),
2343 &la->sin_addr.s_addr, ntohs(la->sin_port),
2344 &ra->sin_addr.s_addr, ntohs(ra->sin_port));
2345 } else {
2346 pr_info("Active open failure - atid %u status %u errno %d %pI6:%u->%pI6:%u\n",
2347 atid, status, status2errno(status),
2348 la6->sin6_addr.s6_addr, ntohs(la6->sin6_port),
2349 ra6->sin6_addr.s6_addr, ntohs(ra6->sin6_port));
2350 }
d716a2a0
VP		 2351 break;
2352 }
2353
caa6c9f2 2354fail:
cfdda9d7
SW		 2355 connect_reply_upcall(ep, status2errno(status));
2356 state_set(&ep->com, DEAD);
2357
84cc6ac6
H		 2358 if (ep->com.remote_addr.ss_family == AF_INET6) {
2359 struct sockaddr_in6 *sin6 =
170003c8 2360 (struct sockaddr_in6 *)&ep->com.local_addr;
84cc6ac6
H		 2361 cxgb4_clip_release(ep->com.dev->rdev.lldi.ports[0],
2362 (const u32 *)&sin6->sin6_addr.s6_addr, 1);
2363 }
cfdda9d7 2364 if (status && act_open_has_tid(status))
1dec4cec
GG		 2365 cxgb4_remove_tid(ep->com.dev->rdev.lldi.tids, 0, GET_TID(rpl),
2366 ep->com.local_addr.ss_family);
cfdda9d7 2367
9f5a9632 2368 xa_erase_irq(&ep->com.dev->atids, atid);
cfdda9d7
SW		 2369 cxgb4_free_atid(t, atid);
2370 dst_release(ep->dst);
2371 cxgb4_l2t_release(ep->l2t);
2372 c4iw_put_ep(&ep->com);
2373
2374 return 0;
2375}
2376
2377static int pass_open_rpl(struct c4iw_dev *dev, struct sk_buff *skb)
2378{
2379 struct cpl_pass_open_rpl *rpl = cplhdr(skb);
cfdda9d7 2380 unsigned int stid = GET_TID(rpl);
f86fac79 2381 struct c4iw_listen_ep *ep = get_ep_from_stid(dev, stid);
cfdda9d7
SW		 2382
2383 if (!ep) {
4d45b757 2384 pr_warn("%s stid %d lookup failure!\n", __func__, stid);
1cab775c 2385 goto out;
cfdda9d7 2386 }
548ddb19 2387 pr_debug("ep %p status %d error %d\n", ep,
a9a42886 2388 rpl->status, status2errno(rpl->status));
2015f26c 2389 c4iw_wake_up_noref(ep->com.wr_waitp, status2errno(rpl->status));
f86fac79 2390 c4iw_put_ep(&ep->com);
1cab775c 2391out:
cfdda9d7
SW		 2392 return 0;
2393}
2394
cfdda9d7
SW		 2395static int close_listsrv_rpl(struct c4iw_dev *dev, struct sk_buff *skb)
2396{
2397 struct cpl_close_listsvr_rpl *rpl = cplhdr(skb);
cfdda9d7 2398 unsigned int stid = GET_TID(rpl);
f86fac79 2399 struct c4iw_listen_ep *ep = get_ep_from_stid(dev, stid);
cfdda9d7 2400
3c8415cc 2401 if (!ep) {
4d45b757 2402 pr_warn("%s stid %d lookup failure!\n", __func__, stid);
3c8415cc
SW		 2403 goto out;
2404 }
548ddb19 2405 pr_debug("ep %p\n", ep);
2015f26c 2406 c4iw_wake_up_noref(ep->com.wr_waitp, status2errno(rpl->status));
f86fac79 2407 c4iw_put_ep(&ep->com);
3c8415cc 2408out:
cfdda9d7
SW		 2409 return 0;
2410}
2411
9dec900c
H		 2412static int accept_cr(struct c4iw_ep *ep, struct sk_buff *skb,
2413 struct cpl_pass_accept_req *req)
cfdda9d7
SW		 2414{
2415 struct cpl_pass_accept_rpl *rpl;
2416 unsigned int mtu_idx;
2417 u64 opt0;
2418 u32 opt2;
cc516700 2419 u32 wscale;
92e7ae71 2420 struct cpl_t5_pass_accept_rpl *rpl5 = NULL;
b408ff28 2421 int win;
963cab50 2422 enum chip_type adapter_type = ep->com.dev->rdev.lldi.adapter_type;
cfdda9d7 2423
548ddb19 2424 pr_debug("ep %p tid %u\n", ep, ep->hwtid);
44c6d069
VP		 2425 cxgb_best_mtu(ep->com.dev->rdev.lldi.mtus, ep->mtu, &mtu_idx,
2426 enable_tcp_timestamps && req->tcpopt.tstamp,
2427 (ep->com.remote_addr.ss_family == AF_INET) ? 0 : 1);
cc516700 2428 wscale = cxgb_compute_wscale(rcv_win);
b408ff28
HS		 2429
2430 /*
2431 * Specify the largest window that will fit in opt0. The
2432 * remainder will be specified in the rx_data_ack.
2433 */
2434 win = ep->rcv_win >> 10;
d7990b0c
AB		 2435 if (win > RCV_BUFSIZ_M)
2436 win = RCV_BUFSIZ_M;
6c53e938 2437 opt0 = (nocong ? NO_CONG_F : 0) |
d7990b0c 2438 KEEP_ALIVE_F |
6c53e938 2439 DELACK_F |
d7990b0c
AB		 2440 WND_SCALE_V(wscale) |
2441 MSS_IDX_V(mtu_idx) |
2442 L2T_IDX_V(ep->l2t->idx) |
2443 TX_CHAN_V(ep->tx_chan) |
2444 SMAC_SEL_V(ep->smac_idx) |
6c53e938 2445 DSCP_V(ep->tos >> 2) |
d7990b0c
AB		 2446 ULP_MODE_V(ULP_MODE_TCPDDP) |
2447 RCV_BUFSIZ_V(win);
2448 opt2 = RX_CHANNEL_V(0) |
2449 RSS_QUEUE_VALID_F | RSS_QUEUE_V(ep->rss_qid);
cfdda9d7
SW		 2450
2451 if (enable_tcp_timestamps && req->tcpopt.tstamp)
6c53e938 2452 opt2 |= TSTAMPS_EN_F;
cfdda9d7 2453 if (enable_tcp_sack && req->tcpopt.sack)
6c53e938 2454 opt2 |= SACK_EN_F;
cfdda9d7 2455 if (wscale && enable_tcp_window_scaling)
d7990b0c 2456 opt2 |= WND_SCALE_EN_F;
5be78ee9
VP		 2457 if (enable_ecn) {
2458 const struct tcphdr *tcph;
2459 u32 hlen = ntohl(req->hdr_len);
2460
963cab50
H		 2461 if (CHELSIO_CHIP_VERSION(adapter_type) <= CHELSIO_T5)
2462 tcph = (const void *)(req + 1) + ETH_HDR_LEN_G(hlen) +
2463 IP_HDR_LEN_G(hlen);
2464 else
2465 tcph = (const void *)(req + 1) +
2466 T6_ETH_HDR_LEN_G(hlen) + T6_IP_HDR_LEN_G(hlen);
5be78ee9 2467 if (tcph->ece && tcph->cwr)
6c53e938 2468 opt2 |= CCTRL_ECN_V(1);
5be78ee9 2469 }
612e0486
PBT		 2470
2471 skb_get(skb);
2472 rpl = cplhdr(skb);
2473 if (!is_t4(adapter_type)) {
2474 skb_trim(skb, roundup(sizeof(*rpl5), 16));
2475 rpl5 = (void *)rpl;
2476 INIT_TP_WR(rpl5, ep->hwtid);
2477 } else {
2478 skb_trim(skb, sizeof(*rpl));
2479 INIT_TP_WR(rpl, ep->hwtid);
2480 }
2481 OPCODE_TID(rpl) = cpu_to_be32(MK_OPCODE_TID(CPL_PASS_ACCEPT_RPL,
2482 ep->hwtid));
2483
963cab50 2484 if (CHELSIO_CHIP_VERSION(adapter_type) > CHELSIO_T4) {
92e7ae71 2485 u32 isn = (prandom_u32() & ~7UL) - 1;
d7990b0c 2486 opt2 |= T5_OPT_2_VALID_F;
cf7fe64a 2487 opt2 |= CONG_CNTRL_V(CONG_ALG_TAHOE);
0b741047 2488 opt2 |= T5_ISS_F;
92e7ae71
HS		 2489 rpl5 = (void *)rpl;
2490 memset(&rpl5->iss, 0, roundup(sizeof(*rpl5)-sizeof(*rpl), 16));
2491 if (peer2peer)
2492 isn += 4;
2493 rpl5->iss = cpu_to_be32(isn);
548ddb19 2494 pr_debug("iss %u\n", be32_to_cpu(rpl5->iss));
92e5011a 2495 }
cfdda9d7 2496
cfdda9d7
SW		 2497 rpl->opt0 = cpu_to_be64(opt0);
2498 rpl->opt2 = cpu_to_be32(opt2);
d4f1a5c6 2499 set_wr_txq(skb, CPL_PRIORITY_SETUP, ep->ctrlq_idx);
9dec900c 2500 t4_set_arp_err_handler(skb, ep, pass_accept_rpl_arp_failure);
cfdda9d7 2501
9dec900c 2502 return c4iw_l2t_send(&ep->com.dev->rdev, skb, ep->l2t);
cfdda9d7
SW		 2503}
2504
830662f6 2505static void reject_cr(struct c4iw_dev *dev, u32 hwtid, struct sk_buff *skb)
cfdda9d7 2506{
548ddb19 2507 pr_debug("c4iw_dev %p tid %u\n", dev, hwtid);
cfdda9d7 2508 skb_trim(skb, sizeof(struct cpl_tid_release));
cfdda9d7
SW		 2509 release_tid(&dev->rdev, hwtid, skb);
2510 return;
2511}
2512
cfdda9d7
SW		 2513static int pass_accept_req(struct c4iw_dev *dev, struct sk_buff *skb)
2514{
793dad94 2515 struct c4iw_ep *child_ep = NULL, *parent_ep;
cfdda9d7 2516 struct cpl_pass_accept_req *req = cplhdr(skb);
6c53e938 2517 unsigned int stid = PASS_OPEN_TID_G(ntohl(req->tos_stid));
cfdda9d7
SW		 2518 struct tid_info *t = dev->rdev.lldi.tids;
2519 unsigned int hwtid = GET_TID(req);
2520 struct dst_entry *dst;
830662f6 2521 __u8 local_ip[16], peer_ip[16];
cfdda9d7 2522 __be16 local_port, peer_port;
84cc6ac6 2523 struct sockaddr_in6 *sin6;
3786cf18 2524 int err;
1cab775c 2525 u16 peer_mss = ntohs(req->tcpopt.mss);
830662f6 2526 int iptype;
92e7ae71 2527 unsigned short hdrs;
7235ea22 2528 u8 tos;
cfdda9d7 2529
f86fac79 2530 parent_ep = (struct c4iw_ep *)get_ep_from_stid(dev, stid);
1cab775c 2531 if (!parent_ep) {
4d45b757
BP		 2532 pr_err("%s connect request on invalid stid %d\n",
2533 __func__, stid);
1cab775c
VP		 2534 goto reject;
2535 }
1cab775c 2536
cfdda9d7 2537 if (state_read(&parent_ep->com) != LISTEN) {
4d45b757 2538 pr_err("%s - listening ep not in LISTEN\n", __func__);
cfdda9d7
SW		 2539 goto reject;
2540 }
2541
7235ea22
SW		 2542 if (parent_ep->com.cm_id->tos_set)
2543 tos = parent_ep->com.cm_id->tos;
2544 else
2545 tos = PASS_OPEN_TOS_G(ntohl(req->tos_stid));
2546
85e42b04
VP		 2547 cxgb_get_4tuple(req, parent_ep->com.dev->rdev.lldi.adapter_type,
2548 &iptype, local_ip, peer_ip, &local_port, &peer_port);
830662f6 2549
cfdda9d7 2550 /* Find output route */
830662f6 2551 if (iptype == 4) {
548ddb19
BP		 2552 pr_debug("parent ep %p hwtid %u laddr %pI4 raddr %pI4 lport %d rport %d peer_mss %d\n"
2553 , parent_ep, hwtid,
a9a42886
JP		 2554 local_ip, peer_ip, ntohs(local_port),
2555 ntohs(peer_port), peer_mss);
804c2f3e
VP		 2556 dst = cxgb_find_route(&dev->rdev.lldi, get_real_dev,
2557 *(__be32 *)local_ip, *(__be32 *)peer_ip,
2558 local_port, peer_port, tos);
830662f6 2559 } else {
548ddb19
BP		 2560 pr_debug("parent ep %p hwtid %u laddr %pI6 raddr %pI6 lport %d rport %d peer_mss %d\n"
2561 , parent_ep, hwtid,
a9a42886
JP		 2562 local_ip, peer_ip, ntohs(local_port),
2563 ntohs(peer_port), peer_mss);
95554761
VP		 2564 dst = cxgb_find_route6(&dev->rdev.lldi, get_real_dev,
2565 local_ip, peer_ip, local_port, peer_port,
7235ea22 2566 tos,
95554761
VP		 2567 ((struct sockaddr_in6 *)
2568 &parent_ep->com.local_addr)->sin6_scope_id);
830662f6
VP		 2569 }
2570 if (!dst) {
700456bd 2571 pr_err("%s - failed to find dst entry!\n", __func__);
cfdda9d7
SW		 2572 goto reject;
2573 }
3786cf18
DM		 2574
2575 child_ep = alloc_ep(sizeof(*child_ep), GFP_KERNEL);
2576 if (!child_ep) {
700456bd 2577 pr_err("%s - failed to allocate ep entry!\n", __func__);
cfdda9d7
SW		 2578 dst_release(dst);
2579 goto reject;
2580 }
2581
963cab50 2582 err = import_ep(child_ep, iptype, peer_ip, dst, dev, false,
ac8e4c69 2583 parent_ep->com.dev->rdev.lldi.adapter_type, tos);
3786cf18 2584 if (err) {
700456bd 2585 pr_err("%s - failed to allocate l2t entry!\n", __func__);
cfdda9d7 2586 dst_release(dst);
3786cf18 2587 kfree(child_ep);
cfdda9d7
SW		 2588 goto reject;
2589 }
3786cf18 2590
98b80a2a
RR		 2591 hdrs = ((iptype == 4) ? sizeof(struct iphdr) : sizeof(struct ipv6hdr)) +
2592 sizeof(struct tcphdr) +
92e7ae71
HS		 2593 ((enable_tcp_timestamps && req->tcpopt.tstamp) ? 12 : 0);
2594 if (peer_mss && child_ep->mtu > (peer_mss + hdrs))
2595 child_ep->mtu = peer_mss + hdrs;
1cab775c 2596
4a740838
H		 2597 skb_queue_head_init(&child_ep->com.ep_skb_list);
2598 if (alloc_ep_skb_list(&child_ep->com.ep_skb_list, CN_MAX_CON_BUF))
2599 goto fail;
2600
cfdda9d7
SW		 2601 state_set(&child_ep->com, CONNECTING);
2602 child_ep->com.dev = dev;
2603 child_ep->com.cm_id = NULL;
5b6b8fe6 2604
830662f6
VP		 2605 if (iptype == 4) {
2606 struct sockaddr_in *sin = (struct sockaddr_in *)
170003c8 2607 &child_ep->com.local_addr;
5b6b8fe6 2608
b462b06e 2609 sin->sin_family = AF_INET;
830662f6
VP		 2610 sin->sin_port = local_port;
2611 sin->sin_addr.s_addr = *(__be32 *)local_ip;
5b6b8fe6
SW		 2612
2613 sin = (struct sockaddr_in *)&child_ep->com.local_addr;
b462b06e 2614 sin->sin_family = AF_INET;
5b6b8fe6
SW		 2615 sin->sin_port = ((struct sockaddr_in *)
2616 &parent_ep->com.local_addr)->sin_port;
2617 sin->sin_addr.s_addr = *(__be32 *)local_ip;
2618
170003c8 2619 sin = (struct sockaddr_in *)&child_ep->com.remote_addr;
b462b06e 2620 sin->sin_family = AF_INET;
830662f6
VP		 2621 sin->sin_port = peer_port;
2622 sin->sin_addr.s_addr = *(__be32 *)peer_ip;
2623 } else {
170003c8 2624 sin6 = (struct sockaddr_in6 *)&child_ep->com.local_addr;
830662f6
VP		 2625 sin6->sin6_family = PF_INET6;
2626 sin6->sin6_port = local_port;
2627 memcpy(sin6->sin6_addr.s6_addr, local_ip, 16);
5b6b8fe6
SW		 2628
2629 sin6 = (struct sockaddr_in6 *)&child_ep->com.local_addr;
2630 sin6->sin6_family = PF_INET6;
2631 sin6->sin6_port = ((struct sockaddr_in6 *)
2632 &parent_ep->com.local_addr)->sin6_port;
2633 memcpy(sin6->sin6_addr.s6_addr, local_ip, 16);
2634
170003c8 2635 sin6 = (struct sockaddr_in6 *)&child_ep->com.remote_addr;
830662f6
VP		 2636 sin6->sin6_family = PF_INET6;
2637 sin6->sin6_port = peer_port;
2638 memcpy(sin6->sin6_addr.s6_addr, peer_ip, 16);
2639 }
5b6b8fe6 2640
cfdda9d7
SW		 2641 c4iw_get_ep(&parent_ep->com);
2642 child_ep->parent_ep = parent_ep;
ac8e4c69 2643 child_ep->tos = tos;
cfdda9d7
SW		 2644 child_ep->dst = dst;
2645 child_ep->hwtid = hwtid;
cfdda9d7 2646
548ddb19 2647 pr_debug("tx_chan %u smac_idx %u rss_qid %u\n",
a9a42886 2648 child_ep->tx_chan, child_ep->smac_idx, child_ep->rss_qid);
cfdda9d7 2649
a9346abe 2650 timer_setup(&child_ep->timer, ep_timeout, 0);
1dec4cec
GG		 2651 cxgb4_insert_tid(t, child_ep, hwtid,
2652 child_ep->com.local_addr.ss_family);
944661dd 2653 insert_ep_tid(child_ep);
9dec900c
H		 2654 if (accept_cr(child_ep, skb, req)) {
2655 c4iw_put_ep(&parent_ep->com);
2656 release_ep_resources(child_ep);
2657 } else {
2658 set_bit(PASS_ACCEPT_REQ, &child_ep->com.history);
2659 }
84cc6ac6 2660 if (iptype == 6) {
170003c8 2661 sin6 = (struct sockaddr_in6 *)&child_ep->com.local_addr;
84cc6ac6
H		 2662 cxgb4_clip_get(child_ep->com.dev->rdev.lldi.ports[0],
2663 (const u32 *)&sin6->sin6_addr.s6_addr, 1);
2664 }
cfdda9d7 2665 goto out;
4a740838
H		 2666fail:
2667 c4iw_put_ep(&child_ep->com);
cfdda9d7 2668reject:
830662f6 2669 reject_cr(dev, hwtid, skb);
3d318605 2670out:
f86fac79
H		 2671 if (parent_ep)
2672 c4iw_put_ep(&parent_ep->com);
cfdda9d7
SW		 2673 return 0;
2674}
2675
2676static int pass_establish(struct c4iw_dev *dev, struct sk_buff *skb)
2677{
2678 struct c4iw_ep *ep;
2679 struct cpl_pass_establish *req = cplhdr(skb);
cfdda9d7 2680 unsigned int tid = GET_TID(req);
fef4422d 2681 int ret;
2e51e45c 2682 u16 tcp_opt = ntohs(req->tcp_opt);
cfdda9d7 2683
944661dd 2684 ep = get_ep_from_tid(dev, tid);
548ddb19 2685 pr_debug("ep %p tid %u\n", ep, ep->hwtid);
cfdda9d7
SW		 2686 ep->snd_seq = be32_to_cpu(req->snd_isn);
2687 ep->rcv_seq = be32_to_cpu(req->rcv_isn);
2e51e45c 2688 ep->snd_wscale = TCPOPT_SND_WSCALE_G(tcp_opt);
cfdda9d7 2689
2e51e45c 2690 pr_debug("ep %p hwtid %u tcp_opt 0x%02x\n", ep, tid, tcp_opt);
1cab775c 2691
2e51e45c 2692 set_emss(ep, tcp_opt);
cfdda9d7
SW		 2693
2694 dst_confirm(ep->dst);
fef4422d
H		 2695 mutex_lock(&ep->com.mutex);
2696 ep->com.state = MPA_REQ_WAIT;
cfdda9d7 2697 start_ep_timer(ep);
793dad94 2698 set_bit(PASS_ESTAB, &ep->com.history);
4a740838 2699 ret = send_flowc(ep);
fef4422d
H		 2700 mutex_unlock(&ep->com.mutex);
2701 if (ret)
2702 c4iw_ep_disconnect(ep, 1, GFP_KERNEL);
944661dd 2703 c4iw_put_ep(&ep->com);
cfdda9d7
SW		 2704
2705 return 0;
2706}
2707
2708static int peer_close(struct c4iw_dev *dev, struct sk_buff *skb)
2709{
2710 struct cpl_peer_close *hdr = cplhdr(skb);
2711 struct c4iw_ep *ep;
2712 struct c4iw_qp_attributes attrs;
cfdda9d7
SW		 2713 int disconnect = 1;
2714 int release = 0;
cfdda9d7 2715 unsigned int tid = GET_TID(hdr);
8da7e7a5 2716 int ret;
cfdda9d7 2717
944661dd
H		 2718 ep = get_ep_from_tid(dev, tid);
2719 if (!ep)
2720 return 0;
2721
548ddb19 2722 pr_debug("ep %p tid %u\n", ep, ep->hwtid);
cfdda9d7
SW		 2723 dst_confirm(ep->dst);
2724
793dad94 2725 set_bit(PEER_CLOSE, &ep->com.history);
2f5b48c3 2726 mutex_lock(&ep->com.mutex);
cfdda9d7
SW		 2727 switch (ep->com.state) {
2728 case MPA_REQ_WAIT:
2729 __state_set(&ep->com, CLOSING);
2730 break;
2731 case MPA_REQ_SENT:
2732 __state_set(&ep->com, CLOSING);
2733 connect_reply_upcall(ep, -ECONNRESET);
2734 break;
2735 case MPA_REQ_RCVD:
2736
2737 /*
2738 * We're gonna mark this puppy DEAD, but keep
2739 * the reference on it until the ULP accepts or
2740 * rejects the CR. Also wake up anyone waiting
2741 * in rdma connection migration (see c4iw_accept_cr()).
2742 */
2743 __state_set(&ep->com, CLOSING);
a9a42886 2744 pr_debug("waking up ep %p tid %u\n", ep, ep->hwtid);
2015f26c 2745 c4iw_wake_up_noref(ep->com.wr_waitp, -ECONNRESET);
cfdda9d7
SW		 2746 break;
2747 case MPA_REP_SENT:
2748 __state_set(&ep->com, CLOSING);
a9a42886 2749 pr_debug("waking up ep %p tid %u\n", ep, ep->hwtid);
2015f26c 2750 c4iw_wake_up_noref(ep->com.wr_waitp, -ECONNRESET);
cfdda9d7
SW		 2751 break;
2752 case FPDU_MODE:
ca5a2202 2753 start_ep_timer(ep);
cfdda9d7 2754 __state_set(&ep->com, CLOSING);
30c95c2d 2755 attrs.next_state = C4IW_QP_STATE_CLOSING;
8da7e7a5 2756 ret = c4iw_modify_qp(ep->com.qp->rhp, ep->com.qp,
30c95c2d 2757 C4IW_QP_ATTR_NEXT_STATE, &attrs, 1);
8da7e7a5
SW		 2758 if (ret != -ECONNRESET) {
2759 peer_close_upcall(ep);
2760 disconnect = 1;
2761 }
cfdda9d7
SW		 2762 break;
2763 case ABORTING:
2764 disconnect = 0;
2765 break;
2766 case CLOSING:
2767 __state_set(&ep->com, MORIBUND);
2768 disconnect = 0;
2769 break;
2770 case MORIBUND:
b33bd0cb 2771 (void)stop_ep_timer(ep);
cfdda9d7
SW		 2772 if (ep->com.cm_id && ep->com.qp) {
2773 attrs.next_state = C4IW_QP_STATE_IDLE;
2774 c4iw_modify_qp(ep->com.qp->rhp, ep->com.qp,
2775 C4IW_QP_ATTR_NEXT_STATE, &attrs, 1);
2776 }
be13b2df 2777 close_complete_upcall(ep, 0);
cfdda9d7
SW		 2778 __state_set(&ep->com, DEAD);
2779 release = 1;
2780 disconnect = 0;
2781 break;
2782 case DEAD:
2783 disconnect = 0;
2784 break;
2785 default:
ba97b749 2786 WARN_ONCE(1, "Bad endpoint state %u\n", ep->com.state);
cfdda9d7 2787 }
2f5b48c3 2788 mutex_unlock(&ep->com.mutex);
cfdda9d7
SW		 2789 if (disconnect)
2790 c4iw_ep_disconnect(ep, 0, GFP_KERNEL);
2791 if (release)
2792 release_ep_resources(ep);
944661dd 2793 c4iw_put_ep(&ep->com);
cfdda9d7
SW		 2794 return 0;
2795}
2796
11a27e21
RR		 2797static void finish_peer_abort(struct c4iw_dev *dev, struct c4iw_ep *ep)
2798{
2799 complete_cached_srq_buffers(ep, ep->srqe_idx);
2800 if (ep->com.cm_id && ep->com.qp) {
2801 struct c4iw_qp_attributes attrs;
2802
2803 attrs.next_state = C4IW_QP_STATE_ERROR;
2804 c4iw_modify_qp(ep->com.qp->rhp, ep->com.qp,
2805 C4IW_QP_ATTR_NEXT_STATE, &attrs, 1);
2806 }
2807 peer_abort_upcall(ep);
2808 release_ep_resources(ep);
2809 c4iw_put_ep(&ep->com);
2810}
2811
cfdda9d7
SW		 2812static int peer_abort(struct c4iw_dev *dev, struct sk_buff *skb)
2813{
6a0b6174 2814 struct cpl_abort_req_rss6 *req = cplhdr(skb);
cfdda9d7 2815 struct c4iw_ep *ep;
cfdda9d7
SW		 2816 struct sk_buff *rpl_skb;
2817 struct c4iw_qp_attributes attrs;
2818 int ret;
2819 int release = 0;
cfdda9d7 2820 unsigned int tid = GET_TID(req);
6a0b6174 2821 u8 status;
11a27e21 2822 u32 srqidx;
6a0b6174 2823
052f4731 2824 u32 len = roundup(sizeof(struct cpl_abort_rpl), 16);
cfdda9d7 2825
944661dd
H		 2826 ep = get_ep_from_tid(dev, tid);
2827 if (!ep)
2828 return 0;
2829
6a0b6174
RR		 2830 status = ABORT_RSS_STATUS_G(be32_to_cpu(req->srqidx_status));
2831
2832 if (cxgb_is_neg_adv(status)) {
f48fca4d 2833 pr_debug("Negative advice on abort- tid %u status %d (%s)\n",
6a0b6174 2834 ep->hwtid, status, neg_adv_str(status));
179d03bb
H		 2835 ep->stats.abort_neg_adv++;
2836 mutex_lock(&dev->rdev.stats.lock);
2837 dev->rdev.stats.neg_adv++;
2838 mutex_unlock(&dev->rdev.stats.lock);
944661dd 2839 goto deref_ep;
cfdda9d7 2840 }
6a0b6174 2841
548ddb19 2842 pr_debug("ep %p tid %u state %u\n", ep, ep->hwtid,
a9a42886 2843 ep->com.state);
793dad94 2844 set_bit(PEER_ABORT, &ep->com.history);
2f5b48c3
SW		 2845
2846 /*
2847 * Wake up any threads in rdma_init() or rdma_fini().
d2fe99e8
KS		 2848 * However, this is not needed if com state is just
2849 * MPA_REQ_SENT
2f5b48c3 2850 */
d2fe99e8 2851 if (ep->com.state != MPA_REQ_SENT)
2015f26c 2852 c4iw_wake_up_noref(ep->com.wr_waitp, -ECONNRESET);
2f5b48c3
SW		 2853
2854 mutex_lock(&ep->com.mutex);
cfdda9d7
SW		 2855 switch (ep->com.state) {
2856 case CONNECTING:
9dec900c 2857 c4iw_put_ep(&ep->parent_ep->com);
cfdda9d7
SW		 2858 break;
2859 case MPA_REQ_WAIT:
b33bd0cb 2860 (void)stop_ep_timer(ep);
cfdda9d7
SW		 2861 break;
2862 case MPA_REQ_SENT:
b33bd0cb 2863 (void)stop_ep_timer(ep);
9828ca65
SW		 2864 if (status != CPL_ERR_CONN_RESET || mpa_rev == 1 ||
2865 (mpa_rev == 2 && ep->tried_with_mpa_v1))
d2fe99e8
KS		 2866 connect_reply_upcall(ep, -ECONNRESET);
2867 else {
2868 /*
2869 * we just don't send notification upwards because we
2870 * want to retry with mpa_v1 without upper layers even
2871 * knowing it.
2872 *
2873 * do some housekeeping so as to re-initiate the
2874 * connection
2875 */
4d45b757
BP		 2876 pr_info("%s: mpa_rev=%d. Retrying with mpav1\n",
2877 __func__, mpa_rev);
d2fe99e8
KS		 2878 ep->retry_with_mpa_v1 = 1;
2879 }
cfdda9d7
SW		 2880 break;
2881 case MPA_REP_SENT:
cfdda9d7
SW		 2882 break;
2883 case MPA_REQ_RCVD:
cfdda9d7
SW		 2884 break;
2885 case MORIBUND:
2886 case CLOSING:
ca5a2202 2887 stop_ep_timer(ep);
df561f66 2888 fallthrough;
cfdda9d7 2889 case FPDU_MODE:
11a27e21
RR		 2890 if (ep->com.qp && ep->com.qp->srq) {
2891 srqidx = ABORT_RSS_SRQIDX_G(
2892 be32_to_cpu(req->srqidx_status));
2893 if (srqidx) {
c8b1f340 2894 complete_cached_srq_buffers(ep, srqidx);
11a27e21
RR		 2895 } else {
2896 /* Hold ep ref until finish_peer_abort() */
2897 c4iw_get_ep(&ep->com);
2898 __state_set(&ep->com, ABORTING);
2899 set_bit(PEER_ABORT_IN_PROGRESS, &ep->com.flags);
2900 read_tcb(ep);
2901 break;
2902
2903 }
2904 }
2905
cfdda9d7
SW		 2906 if (ep->com.cm_id && ep->com.qp) {
2907 attrs.next_state = C4IW_QP_STATE_ERROR;
2908 ret = c4iw_modify_qp(ep->com.qp->rhp,
2909 ep->com.qp, C4IW_QP_ATTR_NEXT_STATE,
2910 &attrs, 1);
2911 if (ret)
700456bd 2912 pr_err("%s - qp <- error failed!\n", __func__);
cfdda9d7
SW		 2913 }
2914 peer_abort_upcall(ep);
2915 break;
2916 case ABORTING:
2917 break;
2918 case DEAD:
4d45b757 2919 pr_warn("%s PEER_ABORT IN DEAD STATE!!!!\n", __func__);
2f5b48c3 2920 mutex_unlock(&ep->com.mutex);
944661dd 2921 goto deref_ep;
cfdda9d7 2922 default:
ba97b749 2923 WARN_ONCE(1, "Bad endpoint state %u\n", ep->com.state);
cfdda9d7
SW		 2924 break;
2925 }
2926 dst_confirm(ep->dst);
2927 if (ep->com.state != ABORTING) {
2928 __state_set(&ep->com, DEAD);
d2fe99e8
KS		 2929 /* we don't release if we want to retry with mpa_v1 */
2930 if (!ep->retry_with_mpa_v1)
2931 release = 1;
cfdda9d7 2932 }
2f5b48c3 2933 mutex_unlock(&ep->com.mutex);
cfdda9d7 2934
4a740838
H		 2935 rpl_skb = skb_dequeue(&ep->com.ep_skb_list);
2936 if (WARN_ON(!rpl_skb)) {
cfdda9d7
SW		 2937 release = 1;
2938 goto out;
2939 }
052f4731
VP		 2940
2941 cxgb_mk_abort_rpl(rpl_skb, len, ep->hwtid, ep->txq_idx);
2942
cfdda9d7
SW		 2943 c4iw_ofld_send(&ep->com.dev->rdev, rpl_skb);
2944out:
cfdda9d7
SW		 2945 if (release)
2946 release_ep_resources(ep);
fe7e0a4d 2947 else if (ep->retry_with_mpa_v1) {
84cc6ac6
H		 2948 if (ep->com.remote_addr.ss_family == AF_INET6) {
2949 struct sockaddr_in6 *sin6 =
2950 (struct sockaddr_in6 *)
170003c8 2951 &ep->com.local_addr;
84cc6ac6
H		 2952 cxgb4_clip_release(
2953 ep->com.dev->rdev.lldi.ports[0],
2954 (const u32 *)&sin6->sin6_addr.s6_addr,
2955 1);
2956 }
f254ba6a 2957 xa_erase_irq(&ep->com.dev->hwtids, ep->hwtid);
1dec4cec
GG		 2958 cxgb4_remove_tid(ep->com.dev->rdev.lldi.tids, 0, ep->hwtid,
2959 ep->com.local_addr.ss_family);
d2fe99e8
KS		 2960 dst_release(ep->dst);
2961 cxgb4_l2t_release(ep->l2t);
2962 c4iw_reconnect(ep);
2963 }
2964
944661dd
H		 2965deref_ep:
2966 c4iw_put_ep(&ep->com);
2967 /* Dereferencing ep, referenced in peer_abort_intr() */
2968 c4iw_put_ep(&ep->com);
cfdda9d7
SW		 2969 return 0;
2970}
2971
2972static int close_con_rpl(struct c4iw_dev *dev, struct sk_buff *skb)
2973{
2974 struct c4iw_ep *ep;
2975 struct c4iw_qp_attributes attrs;
2976 struct cpl_close_con_rpl *rpl = cplhdr(skb);
cfdda9d7 2977 int release = 0;
cfdda9d7 2978 unsigned int tid = GET_TID(rpl);
cfdda9d7 2979
944661dd
H		 2980 ep = get_ep_from_tid(dev, tid);
2981 if (!ep)
2982 return 0;
cfdda9d7 2983
548ddb19 2984 pr_debug("ep %p tid %u\n", ep, ep->hwtid);
cfdda9d7
SW		 2985
2986 /* The cm_id may be null if we failed to connect */
2f5b48c3 2987 mutex_lock(&ep->com.mutex);
9ca6f7cf 2988 set_bit(CLOSE_CON_RPL, &ep->com.history);
cfdda9d7
SW		 2989 switch (ep->com.state) {
2990 case CLOSING:
2991 __state_set(&ep->com, MORIBUND);
2992 break;
2993 case MORIBUND:
b33bd0cb 2994 (void)stop_ep_timer(ep);
cfdda9d7
SW		 2995 if ((ep->com.cm_id) && (ep->com.qp)) {
2996 attrs.next_state = C4IW_QP_STATE_IDLE;
2997 c4iw_modify_qp(ep->com.qp->rhp,
2998 ep->com.qp,
2999 C4IW_QP_ATTR_NEXT_STATE,
3000 &attrs, 1);
3001 }
be13b2df 3002 close_complete_upcall(ep, 0);
cfdda9d7
SW		 3003 __state_set(&ep->com, DEAD);
3004 release = 1;
3005 break;
3006 case ABORTING:
3007 case DEAD:
3008 break;
3009 default:
ba97b749 3010 WARN_ONCE(1, "Bad endpoint state %u\n", ep->com.state);
cfdda9d7
SW		 3011 break;
3012 }
2f5b48c3 3013 mutex_unlock(&ep->com.mutex);
cfdda9d7
SW		 3014 if (release)
3015 release_ep_resources(ep);
944661dd 3016 c4iw_put_ep(&ep->com);
cfdda9d7
SW		 3017 return 0;
3018}
3019
3020static int terminate(struct c4iw_dev *dev, struct sk_buff *skb)
3021{
0e42c1f4 3022 struct cpl_rdma_terminate *rpl = cplhdr(skb);
0e42c1f4
SW		 3023 unsigned int tid = GET_TID(rpl);
3024 struct c4iw_ep *ep;
3025 struct c4iw_qp_attributes attrs;
cfdda9d7 3026
944661dd 3027 ep = get_ep_from_tid(dev, tid);
cfdda9d7 3028
3352976c
RR		 3029 if (ep) {
3030 if (ep->com.qp) {
3031 pr_warn("TERM received tid %u qpid %u\n", tid,
3032 ep->com.qp->wq.sq.qid);
3033 attrs.next_state = C4IW_QP_STATE_TERMINATE;
3034 c4iw_modify_qp(ep->com.qp->rhp, ep->com.qp,
3035 C4IW_QP_ATTR_NEXT_STATE, &attrs, 1);
3036 }
3037
d219face
KE		 3038 /* As per draft-hilland-iwarp-verbs-v1.0, sec 6.2.3,
3039 * when entering the TERM state the RNIC MUST initiate a CLOSE.
3040 */
3041 c4iw_ep_disconnect(ep, 1, GFP_KERNEL);
3352976c 3042 c4iw_put_ep(&ep->com);
0e42c1f4 3043 } else
700456bd 3044 pr_warn("TERM received tid %u no ep/qp\n", tid);
cfdda9d7 3045
cfdda9d7
SW		 3046 return 0;
3047}
3048
3049/*
3050 * Upcall from the adapter indicating data has been transmitted.
3051 * For us its just the single MPA request or reply. We can now free
3052 * the skb holding the mpa message.
3053 */
3054static int fw4_ack(struct c4iw_dev *dev, struct sk_buff *skb)
3055{
3056 struct c4iw_ep *ep;
3057 struct cpl_fw4_ack *hdr = cplhdr(skb);
3058 u8 credits = hdr->credits;
3059 unsigned int tid = GET_TID(hdr);
cfdda9d7
SW		 3060
3061
944661dd
H		 3062 ep = get_ep_from_tid(dev, tid);
3063 if (!ep)
3064 return 0;
548ddb19
BP		 3065 pr_debug("ep %p tid %u credits %u\n",
3066 ep, ep->hwtid, credits);
cfdda9d7 3067 if (credits == 0) {
548ddb19
BP		 3068 pr_debug("0 credit ack ep %p tid %u state %u\n",
3069 ep, ep->hwtid, state_read(&ep->com));
944661dd 3070 goto out;
cfdda9d7
SW		 3071 }
3072
3073 dst_confirm(ep->dst);
3074 if (ep->mpa_skb) {
548ddb19
BP		 3075 pr_debug("last streaming msg ack ep %p tid %u state %u initiator %u freeing skb\n",
3076 ep, ep->hwtid, state_read(&ep->com),
3077 ep->mpa_attr.initiator ? 1 : 0);
12eb5137 3078 mutex_lock(&ep->com.mutex);
cfdda9d7
SW		 3079 kfree_skb(ep->mpa_skb);
3080 ep->mpa_skb = NULL;
e4b76a2a
H		 3081 if (test_bit(STOP_MPA_TIMER, &ep->com.flags))
3082 stop_ep_timer(ep);
3083 mutex_unlock(&ep->com.mutex);
cfdda9d7 3084 }
944661dd
H		 3085out:
3086 c4iw_put_ep(&ep->com);
cfdda9d7
SW		 3087 return 0;
3088}
3089
cfdda9d7
SW		 3090int c4iw_reject_cr(struct iw_cm_id *cm_id, const void *pdata, u8 pdata_len)
3091{
bce2841f 3092 int abort;
cfdda9d7 3093 struct c4iw_ep *ep = to_ep(cm_id);
bce2841f 3094
548ddb19 3095 pr_debug("ep %p tid %u\n", ep, ep->hwtid);
cfdda9d7 3096
a7db89eb 3097 mutex_lock(&ep->com.mutex);
e8667a9b 3098 if (ep->com.state != MPA_REQ_RCVD) {
a7db89eb 3099 mutex_unlock(&ep->com.mutex);
cfdda9d7
SW		 3100 c4iw_put_ep(&ep->com);
3101 return -ECONNRESET;
3102 }
793dad94 3103 set_bit(ULP_REJECT, &ep->com.history);
cfdda9d7 3104 if (mpa_rev == 0)
bce2841f
H		 3105 abort = 1;
3106 else
3107 abort = send_mpa_reject(ep, pdata, pdata_len);
a7db89eb 3108 mutex_unlock(&ep->com.mutex);
bce2841f
H		 3109
3110 stop_ep_timer(ep);
3111 c4iw_ep_disconnect(ep, abort != 0, GFP_KERNEL);
cfdda9d7
SW		 3112 c4iw_put_ep(&ep->com);
3113 return 0;
3114}
3115
3116int c4iw_accept_cr(struct iw_cm_id *cm_id, struct iw_cm_conn_param *conn_param)
3117{
3118 int err;
3119 struct c4iw_qp_attributes attrs;
3120 enum c4iw_qp_attr_mask mask;
3121 struct c4iw_ep *ep = to_ep(cm_id);
3122 struct c4iw_dev *h = to_c4iw_dev(cm_id->device);
3123 struct c4iw_qp *qp = get_qhp(h, conn_param->qpn);
eaf4c6d4 3124 int abort = 0;
cfdda9d7 3125
548ddb19 3126 pr_debug("ep %p tid %u\n", ep, ep->hwtid);
a7db89eb
SW		 3127
3128 mutex_lock(&ep->com.mutex);
e8667a9b 3129 if (ep->com.state != MPA_REQ_RCVD) {
cfdda9d7 3130 err = -ECONNRESET;
eaf4c6d4 3131 goto err_out;
cfdda9d7
SW		 3132 }
3133
ba97b749
SW		 3134 if (!qp) {
3135 err = -EINVAL;
3136 goto err_out;
3137 }
cfdda9d7 3138
793dad94 3139 set_bit(ULP_ACCEPT, &ep->com.history);
4c2c5763
HS		 3140 if ((conn_param->ord > cur_max_read_depth(ep->com.dev)) ||
3141 (conn_param->ird > cur_max_read_depth(ep->com.dev))) {
cfdda9d7 3142 err = -EINVAL;
eaf4c6d4 3143 goto err_abort;
cfdda9d7
SW		 3144 }
3145
d2fe99e8
KS		 3146 if (ep->mpa_attr.version == 2 && ep->mpa_attr.enhanced_rdma_conn) {
3147 if (conn_param->ord > ep->ird) {
4c2c5763 3148 if (RELAXED_IRD_NEGOTIATION) {
30b03b15 3149 conn_param->ord = ep->ird;
4c2c5763
HS		 3150 } else {
3151 ep->ird = conn_param->ird;
3152 ep->ord = conn_param->ord;
3153 send_mpa_reject(ep, conn_param->private_data,
3154 conn_param->private_data_len);
4c2c5763 3155 err = -ENOMEM;
eaf4c6d4 3156 goto err_abort;
4c2c5763 3157 }
d2fe99e8 3158 }
4c2c5763
HS		 3159 if (conn_param->ird < ep->ord) {
3160 if (RELAXED_IRD_NEGOTIATION &&
3161 ep->ord <= h->rdev.lldi.max_ordird_qp) {
3162 conn_param->ird = ep->ord;
3163 } else {
d2fe99e8 3164 err = -ENOMEM;
eaf4c6d4 3165 goto err_abort;
d2fe99e8
KS		 3166 }
3167 }
d2fe99e8 3168 }
cfdda9d7
SW		 3169 ep->ird = conn_param->ird;
3170 ep->ord = conn_param->ord;
3171
4c2c5763 3172 if (ep->mpa_attr.version == 1) {
d2fe99e8
KS		 3173 if (peer2peer && ep->ird == 0)
3174 ep->ird = 1;
4c2c5763
HS		 3175 } else {
3176 if (peer2peer &&
3177 (ep->mpa_attr.p2p_type != FW_RI_INIT_P2PTYPE_DISABLED) &&
f57b780c 3178 (p2p_type == FW_RI_INIT_P2PTYPE_READ_REQ) && ep->ird == 0)
4c2c5763
HS		 3179 ep->ird = 1;
3180 }
cfdda9d7 3181
548ddb19 3182 pr_debug("ird %d ord %d\n", ep->ird, ep->ord);
cfdda9d7 3183
d2fe99e8 3184 ep->com.cm_id = cm_id;
9ca6f7cf 3185 ref_cm_id(&ep->com);
d2fe99e8 3186 ep->com.qp = qp;
325abead 3187 ref_qp(ep);
d2fe99e8 3188
cfdda9d7
SW		 3189 /* bind QP to EP and move to RTS */
3190 attrs.mpa_attr = ep->mpa_attr;
3191 attrs.max_ird = ep->ird;
3192 attrs.max_ord = ep->ord;
3193 attrs.llp_stream_handle = ep;
3194 attrs.next_state = C4IW_QP_STATE_RTS;
3195
3196 /* bind QP and TID with INIT_WR */
3197 mask = C4IW_QP_ATTR_NEXT_STATE |
3198 C4IW_QP_ATTR_LLP_STREAM_HANDLE |
3199 C4IW_QP_ATTR_MPA_ATTR |
3200 C4IW_QP_ATTR_MAX_IRD |
3201 C4IW_QP_ATTR_MAX_ORD;
3202
3203 err = c4iw_modify_qp(ep->com.qp->rhp,
3204 ep->com.qp, mask, &attrs, 1);
3205 if (err)
eaf4c6d4 3206 goto err_deref_cm_id;
e4b76a2a
H		 3207
3208 set_bit(STOP_MPA_TIMER, &ep->com.flags);
cfdda9d7
SW		 3209 err = send_mpa_reply(ep, conn_param->private_data,
3210 conn_param->private_data_len);
3211 if (err)
eaf4c6d4 3212 goto err_deref_cm_id;
cfdda9d7 3213
a7db89eb 3214 __state_set(&ep->com, FPDU_MODE);
cfdda9d7 3215 established_upcall(ep);
a7db89eb 3216 mutex_unlock(&ep->com.mutex);
cfdda9d7
SW		 3217 c4iw_put_ep(&ep->com);
3218 return 0;
eaf4c6d4 3219err_deref_cm_id:
9ca6f7cf 3220 deref_cm_id(&ep->com);
eaf4c6d4
H		 3221err_abort:
3222 abort = 1;
3223err_out:
a7db89eb 3224 mutex_unlock(&ep->com.mutex);
eaf4c6d4
H		 3225 if (abort)
3226 c4iw_ep_disconnect(ep, 1, GFP_KERNEL);
cfdda9d7
SW		 3227 c4iw_put_ep(&ep->com);
3228 return err;
3229}
3230
830662f6
VP		 3231static int pick_local_ipaddrs(struct c4iw_dev *dev, struct iw_cm_id *cm_id)
3232{
3233 struct in_device *ind;
3234 int found = 0;
170003c8
SW		 3235 struct sockaddr_in *laddr = (struct sockaddr_in *)&cm_id->m_local_addr;
3236 struct sockaddr_in *raddr = (struct sockaddr_in *)&cm_id->m_remote_addr;
cb8f1478 3237 const struct in_ifaddr *ifa;
830662f6
VP		 3238
3239 ind = in_dev_get(dev->rdev.lldi.ports[0]);
3240 if (!ind)
3241 return -EADDRNOTAVAIL;
cb8f1478
FW		 3242 rcu_read_lock();
3243 in_dev_for_each_ifa_rcu(ifa, ind) {
3244 if (ifa->ifa_flags & IFA_F_SECONDARY)
3245 continue;
830662f6
VP		 3246 laddr->sin_addr.s_addr = ifa->ifa_address;
3247 raddr->sin_addr.s_addr = ifa->ifa_address;
3248 found = 1;
3249 break;
3250 }
cb8f1478
FW		 3251 rcu_read_unlock();
3252
830662f6
VP		 3253 in_dev_put(ind);
3254 return found ? 0 : -EADDRNOTAVAIL;
3255}
3256
3257static int get_lladdr(struct net_device *dev, struct in6_addr *addr,
3258 unsigned char banned_flags)
3259{
3260 struct inet6_dev *idev;
3261 int err = -EADDRNOTAVAIL;
3262
3263 rcu_read_lock();
3264 idev = __in6_dev_get(dev);
3265 if (idev != NULL) {
3266 struct inet6_ifaddr *ifp;
3267
3268 read_lock_bh(&idev->lock);
3269 list_for_each_entry(ifp, &idev->addr_list, if_list) {
3270 if (ifp->scope == IFA_LINK &&
3271 !(ifp->flags & banned_flags)) {
3272 memcpy(addr, &ifp->addr, 16);
3273 err = 0;
3274 break;
3275 }
3276 }
3277 read_unlock_bh(&idev->lock);
3278 }
3279 rcu_read_unlock();
3280 return err;
3281}
3282
3283static int pick_local_ip6addrs(struct c4iw_dev *dev, struct iw_cm_id *cm_id)
3284{
3f649ab7 3285 struct in6_addr addr;
170003c8
SW		 3286 struct sockaddr_in6 *la6 = (struct sockaddr_in6 *)&cm_id->m_local_addr;
3287 struct sockaddr_in6 *ra6 = (struct sockaddr_in6 *)&cm_id->m_remote_addr;
830662f6 3288
54b9a96f 3289 if (!get_lladdr(dev->rdev.lldi.ports[0], &addr, IFA_F_TENTATIVE)) {
830662f6
VP		 3290 memcpy(la6->sin6_addr.s6_addr, &addr, 16);
3291 memcpy(ra6->sin6_addr.s6_addr, &addr, 16);
3292 return 0;
3293 }
3294 return -EADDRNOTAVAIL;
3295}
3296
cfdda9d7
SW		 3297int c4iw_connect(struct iw_cm_id *cm_id, struct iw_cm_conn_param *conn_param)
3298{
cfdda9d7
SW		 3299 struct c4iw_dev *dev = to_c4iw_dev(cm_id->device);
3300 struct c4iw_ep *ep;
3786cf18 3301 int err = 0;
9eccfe10
SW		 3302 struct sockaddr_in *laddr;
3303 struct sockaddr_in *raddr;
3304 struct sockaddr_in6 *laddr6;
3305 struct sockaddr_in6 *raddr6;
830662f6
VP		 3306 __u8 *ra;
3307 int iptype;
cfdda9d7 3308
4c2c5763
HS		 3309 if ((conn_param->ord > cur_max_read_depth(dev)) ||
3310 (conn_param->ird > cur_max_read_depth(dev))) {
be4c9bad
RD		 3311 err = -EINVAL;
3312 goto out;
3313 }
cfdda9d7
SW		 3314 ep = alloc_ep(sizeof(*ep), GFP_KERNEL);
3315 if (!ep) {
700456bd 3316 pr_err("%s - cannot alloc ep\n", __func__);
cfdda9d7
SW		 3317 err = -ENOMEM;
3318 goto out;
3319 }
4a740838
H		 3320
3321 skb_queue_head_init(&ep->com.ep_skb_list);
3322 if (alloc_ep_skb_list(&ep->com.ep_skb_list, CN_MAX_CON_BUF)) {
3323 err = -ENOMEM;
3324 goto fail1;
3325 }
3326
a9346abe 3327 timer_setup(&ep->timer, ep_timeout, 0);
cfdda9d7
SW		 3328 ep->plen = conn_param->private_data_len;
3329 if (ep->plen)
3330 memcpy(ep->mpa_pkt + sizeof(struct mpa_message),
3331 conn_param->private_data, ep->plen);
3332 ep->ird = conn_param->ird;
3333 ep->ord = conn_param->ord;
3334
3335 if (peer2peer && ep->ord == 0)
3336 ep->ord = 1;
3337
cfdda9d7 3338 ep->com.cm_id = cm_id;
9ca6f7cf 3339 ref_cm_id(&ep->com);
b06f2efd 3340 cm_id->provider_data = ep;
9ca6f7cf 3341 ep->com.dev = dev;
cfdda9d7 3342 ep->com.qp = get_qhp(dev, conn_param->qpn);
830662f6 3343 if (!ep->com.qp) {
4d45b757 3344 pr_warn("%s qpn 0x%x not found!\n", __func__, conn_param->qpn);
830662f6 3345 err = -EINVAL;
4a740838 3346 goto fail2;
830662f6 3347 }
325abead 3348 ref_qp(ep);
548ddb19 3349 pr_debug("qpn 0x%x qp %p cm_id %p\n", conn_param->qpn,
a9a42886 3350 ep->com.qp, cm_id);
cfdda9d7
SW		 3351
3352 /*
3353 * Allocate an active TID to initiate a TCP connection.
3354 */
3355 ep->atid = cxgb4_alloc_atid(dev->rdev.lldi.tids, ep);
3356 if (ep->atid == -1) {
700456bd 3357 pr_err("%s - cannot alloc atid\n", __func__);
cfdda9d7 3358 err = -ENOMEM;
4a740838 3359 goto fail2;
cfdda9d7 3360 }
9f5a9632
MW		 3361 err = xa_insert_irq(&dev->atids, ep->atid, ep, GFP_KERNEL);
3362 if (err)
3363 goto fail5;
cfdda9d7 3364
170003c8 3365 memcpy(&ep->com.local_addr, &cm_id->m_local_addr,
9eccfe10 3366 sizeof(ep->com.local_addr));
170003c8 3367 memcpy(&ep->com.remote_addr, &cm_id->m_remote_addr,
9eccfe10
SW		 3368 sizeof(ep->com.remote_addr));
3369
170003c8
SW		 3370 laddr = (struct sockaddr_in *)&ep->com.local_addr;
3371 raddr = (struct sockaddr_in *)&ep->com.remote_addr;
3372 laddr6 = (struct sockaddr_in6 *)&ep->com.local_addr;
3373 raddr6 = (struct sockaddr_in6 *) &ep->com.remote_addr;
9eccfe10 3374
170003c8 3375 if (cm_id->m_remote_addr.ss_family == AF_INET) {
830662f6
VP		 3376 iptype = 4;
3377 ra = (__u8 *)&raddr->sin_addr;
cfdda9d7 3378
830662f6
VP		 3379 /*
3380 * Handle loopback requests to INADDR_ANY.
3381 */
ba987e51 3382 if (raddr->sin_addr.s_addr == htonl(INADDR_ANY)) {
830662f6
VP		 3383 err = pick_local_ipaddrs(dev, cm_id);
3384 if (err)
9067f2f0 3385 goto fail3;
830662f6
VP		 3386 }
3387
3388 /* find a route */
548ddb19
BP		 3389 pr_debug("saddr %pI4 sport 0x%x raddr %pI4 rport 0x%x\n",
3390 &laddr->sin_addr, ntohs(laddr->sin_port),
a9a42886 3391 ra, ntohs(raddr->sin_port));
804c2f3e
VP		 3392 ep->dst = cxgb_find_route(&dev->rdev.lldi, get_real_dev,
3393 laddr->sin_addr.s_addr,
3394 raddr->sin_addr.s_addr,
3395 laddr->sin_port,
3396 raddr->sin_port, cm_id->tos);
830662f6
VP		 3397 } else {
3398 iptype = 6;
3399 ra = (__u8 *)&raddr6->sin6_addr;
3400
3401 /*
3402 * Handle loopback requests to INADDR_ANY.
3403 */
3404 if (ipv6_addr_type(&raddr6->sin6_addr) == IPV6_ADDR_ANY) {
3405 err = pick_local_ip6addrs(dev, cm_id);
3406 if (err)
9067f2f0 3407 goto fail3;
830662f6
VP		 3408 }
3409
3410 /* find a route */
548ddb19
BP		 3411 pr_debug("saddr %pI6 sport 0x%x raddr %pI6 rport 0x%x\n",
3412 laddr6->sin6_addr.s6_addr,
a9a42886
JP		 3413 ntohs(laddr6->sin6_port),
3414 raddr6->sin6_addr.s6_addr, ntohs(raddr6->sin6_port));
95554761
VP		 3415 ep->dst = cxgb_find_route6(&dev->rdev.lldi, get_real_dev,
3416 laddr6->sin6_addr.s6_addr,
3417 raddr6->sin6_addr.s6_addr,
3418 laddr6->sin6_port,
c8a7eb55 3419 raddr6->sin6_port, cm_id->tos,
95554761 3420 raddr6->sin6_scope_id);
830662f6
VP		 3421 }
3422 if (!ep->dst) {
700456bd 3423 pr_err("%s - cannot find route\n", __func__);
cfdda9d7 3424 err = -EHOSTUNREACH;
4a740838 3425 goto fail3;
cfdda9d7 3426 }
cfdda9d7 3427
963cab50 3428 err = import_ep(ep, iptype, ra, ep->dst, ep->com.dev, true,
ac8e4c69 3429 ep->com.dev->rdev.lldi.adapter_type, cm_id->tos);
3786cf18 3430 if (err) {
700456bd 3431 pr_err("%s - cannot alloc l2e\n", __func__);
4a740838 3432 goto fail4;
cfdda9d7
SW		 3433 }
3434
548ddb19
BP		 3435 pr_debug("txq_idx %u tx_chan %u smac_idx %u rss_qid %u l2t_idx %u\n",
3436 ep->txq_idx, ep->tx_chan, ep->smac_idx, ep->rss_qid,
a9a42886 3437 ep->l2t->idx);
cfdda9d7
SW		 3438
3439 state_set(&ep->com, CONNECTING);
ac8e4c69 3440 ep->tos = cm_id->tos;
cfdda9d7
SW		 3441
3442 /* send connect request to rnic */
3443 err = send_connect(ep);
3444 if (!err)
3445 goto out;
3446
3447 cxgb4_l2t_release(ep->l2t);
4a740838 3448fail4:
9eccfe10 3449 dst_release(ep->dst);
4a740838 3450fail3:
9f5a9632
MW		 3451 xa_erase_irq(&ep->com.dev->atids, ep->atid);
3452fail5:
cfdda9d7 3453 cxgb4_free_atid(ep->com.dev->rdev.lldi.tids, ep->atid);
4a740838
H		 3454fail2:
3455 skb_queue_purge(&ep->com.ep_skb_list);
9ca6f7cf 3456 deref_cm_id(&ep->com);
4a740838 3457fail1:
cfdda9d7
SW		 3458 c4iw_put_ep(&ep->com);
3459out:
3460 return err;
3461}
3462
830662f6
VP		 3463static int create_server6(struct c4iw_dev *dev, struct c4iw_listen_ep *ep)
3464{
3465 int err;
9eccfe10 3466 struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *)
170003c8 3467 &ep->com.local_addr;
830662f6 3468
28de1f74
H		 3469 if (ipv6_addr_type(&sin6->sin6_addr) != IPV6_ADDR_ANY) {
3470 err = cxgb4_clip_get(ep->com.dev->rdev.lldi.ports[0],
3471 (const u32 *)&sin6->sin6_addr.s6_addr, 1);
3472 if (err)
3473 return err;
3474 }
ef885dc6 3475 c4iw_init_wr_wait(ep->com.wr_waitp);
830662f6
VP		 3476 err = cxgb4_create_server6(ep->com.dev->rdev.lldi.ports[0],
3477 ep->stid, &sin6->sin6_addr,
3478 sin6->sin6_port,
3479 ep->com.dev->rdev.lldi.rxq_ids[0]);
3480 if (!err)
3481 err = c4iw_wait_for_reply(&ep->com.dev->rdev,
ef885dc6 3482 ep->com.wr_waitp,
830662f6 3483 0, 0, __func__);
e6b11163
H		 3484 else if (err > 0)
3485 err = net_xmit_errno(err);
28de1f74
H		 3486 if (err) {
3487 cxgb4_clip_release(ep->com.dev->rdev.lldi.ports[0],
3488 (const u32 *)&sin6->sin6_addr.s6_addr, 1);
830662f6
VP		 3489 pr_err("cxgb4_create_server6/filter failed err %d stid %d laddr %pI6 lport %d\n",
3490 err, ep->stid,
3491 sin6->sin6_addr.s6_addr, ntohs(sin6->sin6_port));
28de1f74 3492 }
830662f6
VP		 3493 return err;
3494}
3495
3496static int create_server4(struct c4iw_dev *dev, struct c4iw_listen_ep *ep)
3497{
3498 int err;
9eccfe10 3499 struct sockaddr_in *sin = (struct sockaddr_in *)
170003c8 3500 &ep->com.local_addr;
830662f6
VP		 3501
3502 if (dev->rdev.lldi.enable_fw_ofld_conn) {
3503 do {
3504 err = cxgb4_create_server_filter(
3505 ep->com.dev->rdev.lldi.ports[0], ep->stid,
3506 sin->sin_addr.s_addr, sin->sin_port, 0,
3507 ep->com.dev->rdev.lldi.rxq_ids[0], 0, 0);
3508 if (err == -EBUSY) {
99718e59
H		 3509 if (c4iw_fatal_error(&ep->com.dev->rdev)) {
3510 err = -EIO;
3511 break;
3512 }
830662f6
VP		 3513 set_current_state(TASK_UNINTERRUPTIBLE);
3514 schedule_timeout(usecs_to_jiffies(100));
3515 }
3516 } while (err == -EBUSY);
3517 } else {
ef885dc6 3518 c4iw_init_wr_wait(ep->com.wr_waitp);
830662f6
VP		 3519 err = cxgb4_create_server(ep->com.dev->rdev.lldi.ports[0],
3520 ep->stid, sin->sin_addr.s_addr, sin->sin_port,
3521 0, ep->com.dev->rdev.lldi.rxq_ids[0]);
3522 if (!err)
3523 err = c4iw_wait_for_reply(&ep->com.dev->rdev,
ef885dc6 3524 ep->com.wr_waitp,
830662f6 3525 0, 0, __func__);
e6b11163
H		 3526 else if (err > 0)
3527 err = net_xmit_errno(err);
830662f6
VP		 3528 }
3529 if (err)
3530 pr_err("cxgb4_create_server/filter failed err %d stid %d laddr %pI4 lport %d\n"
3531 , err, ep->stid,
3532 &sin->sin_addr, ntohs(sin->sin_port));
3533 return err;
3534}
3535
cfdda9d7
SW		 3536int c4iw_create_listen(struct iw_cm_id *cm_id, int backlog)
3537{
3538 int err = 0;
3539 struct c4iw_dev *dev = to_c4iw_dev(cm_id->device);
3540 struct c4iw_listen_ep *ep;
3541
cfdda9d7
SW		 3542 might_sleep();
3543
3544 ep = alloc_ep(sizeof(*ep), GFP_KERNEL);
3545 if (!ep) {
700456bd 3546 pr_err("%s - cannot alloc ep\n", __func__);
cfdda9d7
SW		 3547 err = -ENOMEM;
3548 goto fail1;
3549 }
4a740838 3550 skb_queue_head_init(&ep->com.ep_skb_list);
548ddb19 3551 pr_debug("ep %p\n", ep);
cfdda9d7 3552 ep->com.cm_id = cm_id;
9ca6f7cf 3553 ref_cm_id(&ep->com);
cfdda9d7
SW		 3554 ep->com.dev = dev;
3555 ep->backlog = backlog;
170003c8 3556 memcpy(&ep->com.local_addr, &cm_id->m_local_addr,
24d44a39 3557 sizeof(ep->com.local_addr));
cfdda9d7
SW		 3558
3559 /*
3560 * Allocate a server TID.
3561 */
8c044690
KS		 3562 if (dev->rdev.lldi.enable_fw_ofld_conn &&
3563 ep->com.local_addr.ss_family == AF_INET)
830662f6 3564 ep->stid = cxgb4_alloc_sftid(dev->rdev.lldi.tids,
170003c8 3565 cm_id->m_local_addr.ss_family, ep);
1cab775c 3566 else
830662f6 3567 ep->stid = cxgb4_alloc_stid(dev->rdev.lldi.tids,
170003c8 3568 cm_id->m_local_addr.ss_family, ep);
1cab775c 3569
cfdda9d7 3570 if (ep->stid == -1) {
700456bd 3571 pr_err("%s - cannot alloc stid\n", __func__);
cfdda9d7
SW		 3572 err = -ENOMEM;
3573 goto fail2;
3574 }
401b4480
MW		 3575 err = xa_insert_irq(&dev->stids, ep->stid, ep, GFP_KERNEL);
3576 if (err)
3577 goto fail3;
9eccfe10 3578
cfdda9d7 3579 state_set(&ep->com, LISTEN);
830662f6
VP		 3580 if (ep->com.local_addr.ss_family == AF_INET)
3581 err = create_server4(dev, ep);
3582 else
3583 err = create_server6(dev, ep);
cfdda9d7
SW		 3584 if (!err) {
3585 cm_id->provider_data = ep;
3586 goto out;
3587 }
401b4480
MW		 3588 xa_erase_irq(&ep->com.dev->stids, ep->stid);
3589fail3:
830662f6
VP		 3590 cxgb4_free_stid(ep->com.dev->rdev.lldi.tids, ep->stid,
3591 ep->com.local_addr.ss_family);
cfdda9d7 3592fail2:
9ca6f7cf 3593 deref_cm_id(&ep->com);
cfdda9d7
SW		 3594 c4iw_put_ep(&ep->com);
3595fail1:
3596out:
3597 return err;
3598}
3599
3600int c4iw_destroy_listen(struct iw_cm_id *cm_id)
3601{
3602 int err;
3603 struct c4iw_listen_ep *ep = to_listen_ep(cm_id);
3604
548ddb19 3605 pr_debug("ep %p\n", ep);
cfdda9d7
SW		 3606
3607 might_sleep();
3608 state_set(&ep->com, DEAD);
830662f6
VP		 3609 if (ep->com.dev->rdev.lldi.enable_fw_ofld_conn &&
3610 ep->com.local_addr.ss_family == AF_INET) {
1cab775c
VP		 3611 err = cxgb4_remove_server_filter(
3612 ep->com.dev->rdev.lldi.ports[0], ep->stid,
3408be14 3613 ep->com.dev->rdev.lldi.rxq_ids[0], false);
1cab775c 3614 } else {
84cc6ac6 3615 struct sockaddr_in6 *sin6;
ef885dc6 3616 c4iw_init_wr_wait(ep->com.wr_waitp);
830662f6
VP		 3617 err = cxgb4_remove_server(
3618 ep->com.dev->rdev.lldi.ports[0], ep->stid,
603c4690
PBT		 3619 ep->com.dev->rdev.lldi.rxq_ids[0],
3620 ep->com.local_addr.ss_family == AF_INET6);
1cab775c
VP		 3621 if (err)
3622 goto done;
ef885dc6 3623 err = c4iw_wait_for_reply(&ep->com.dev->rdev, ep->com.wr_waitp,
1cab775c 3624 0, 0, __func__);
170003c8 3625 sin6 = (struct sockaddr_in6 *)&ep->com.local_addr;
84cc6ac6
H		 3626 cxgb4_clip_release(ep->com.dev->rdev.lldi.ports[0],
3627 (const u32 *)&sin6->sin6_addr.s6_addr, 1);
1cab775c 3628 }
401b4480 3629 xa_erase_irq(&ep->com.dev->stids, ep->stid);
830662f6
VP		 3630 cxgb4_free_stid(ep->com.dev->rdev.lldi.tids, ep->stid,
3631 ep->com.local_addr.ss_family);
cfdda9d7 3632done:
9ca6f7cf 3633 deref_cm_id(&ep->com);
cfdda9d7
SW		 3634 c4iw_put_ep(&ep->com);
3635 return err;
3636}
3637
3638int c4iw_ep_disconnect(struct c4iw_ep *ep, int abrupt, gfp_t gfp)
3639{
3640 int ret = 0;
cfdda9d7
SW		 3641 int close = 0;
3642 int fatal = 0;
3643 struct c4iw_rdev *rdev;
cfdda9d7 3644
2f5b48c3 3645 mutex_lock(&ep->com.mutex);
cfdda9d7 3646
548ddb19 3647 pr_debug("ep %p state %s, abrupt %d\n", ep,
a9a42886 3648 states[ep->com.state], abrupt);
cfdda9d7 3649
6e410d8f
H		 3650 /*
3651 * Ref the ep here in case we have fatal errors causing the
3652 * ep to be released and freed.
3653 */
3654 c4iw_get_ep(&ep->com);
3655
cfdda9d7
SW		 3656 rdev = &ep->com.dev->rdev;
3657 if (c4iw_fatal_error(rdev)) {
3658 fatal = 1;
be13b2df 3659 close_complete_upcall(ep, -EIO);
cfdda9d7
SW		 3660 ep->com.state = DEAD;
3661 }
3662 switch (ep->com.state) {
3663 case MPA_REQ_WAIT:
3664 case MPA_REQ_SENT:
3665 case MPA_REQ_RCVD:
3666 case MPA_REP_SENT:
3667 case FPDU_MODE:
4a740838 3668 case CONNECTING:
cfdda9d7
SW		 3669 close = 1;
3670 if (abrupt)
3671 ep->com.state = ABORTING;
3672 else {
3673 ep->com.state = CLOSING;
12eb5137
SW		 3674
3675 /*
3676 * if we close before we see the fw4_ack() then we fix
3677 * up the timer state since we're reusing it.
3678 */
3679 if (ep->mpa_skb &&
3680 test_bit(STOP_MPA_TIMER, &ep->com.flags)) {
3681 clear_bit(STOP_MPA_TIMER, &ep->com.flags);
3682 stop_ep_timer(ep);
3683 }
ca5a2202 3684 start_ep_timer(ep);
cfdda9d7
SW		 3685 }
3686 set_bit(CLOSE_SENT, &ep->com.flags);
3687 break;
3688 case CLOSING:
3689 if (!test_and_set_bit(CLOSE_SENT, &ep->com.flags)) {
3690 close = 1;
3691 if (abrupt) {
b33bd0cb 3692 (void)stop_ep_timer(ep);
cfdda9d7
SW		 3693 ep->com.state = ABORTING;
3694 } else
3695 ep->com.state = MORIBUND;
3696 }
3697 break;
3698 case MORIBUND:
3699 case ABORTING:
3700 case DEAD:
f48fca4d
BP		 3701 pr_debug("ignoring disconnect ep %p state %u\n",
3702 ep, ep->com.state);
cfdda9d7
SW		 3703 break;
3704 default:
ba97b749 3705 WARN_ONCE(1, "Bad endpoint state %u\n", ep->com.state);
cfdda9d7
SW		 3706 break;
3707 }
3708
cfdda9d7 3709 if (close) {
8da7e7a5 3710 if (abrupt) {
793dad94 3711 set_bit(EP_DISC_ABORT, &ep->com.history);
4a740838 3712 ret = send_abort(ep);
793dad94
VP		 3713 } else {
3714 set_bit(EP_DISC_CLOSE, &ep->com.history);
4a740838 3715 ret = send_halfclose(ep);
793dad94 3716 }
88bc230d 3717 if (ret) {
9ca6f7cf 3718 set_bit(EP_DISC_FAIL, &ep->com.history);
88bc230d
H		 3719 if (!abrupt) {
3720 stop_ep_timer(ep);
3721 close_complete_upcall(ep, -EIO);
3722 }
c00dcbaf
H		 3723 if (ep->com.qp) {
3724 struct c4iw_qp_attributes attrs;
3725
3726 attrs.next_state = C4IW_QP_STATE_ERROR;
3727 ret = c4iw_modify_qp(ep->com.qp->rhp,
3728 ep->com.qp,
3729 C4IW_QP_ATTR_NEXT_STATE,
3730 &attrs, 1);
3731 if (ret)
700456bd 3732 pr_err("%s - qp <- error failed!\n",
c00dcbaf
H		 3733 __func__);
3734 }
cfdda9d7 3735 fatal = 1;
88bc230d 3736 }
cfdda9d7 3737 }
8da7e7a5 3738 mutex_unlock(&ep->com.mutex);
6e410d8f 3739 c4iw_put_ep(&ep->com);
cfdda9d7
SW		 3740 if (fatal)
3741 release_ep_resources(ep);
3742 return ret;
3743}
3744
1cab775c
VP		 3745static void active_ofld_conn_reply(struct c4iw_dev *dev, struct sk_buff *skb,
3746 struct cpl_fw6_msg_ofld_connection_wr_rpl *req)
3747{
3748 struct c4iw_ep *ep;
793dad94 3749 int atid = be32_to_cpu(req->tid);
1cab775c 3750
ef5d6355
VP		 3751 ep = (struct c4iw_ep *)lookup_atid(dev->rdev.lldi.tids,
3752 (__force u32) req->tid);
1cab775c
VP		 3753 if (!ep)
3754 return;
3755
3756 switch (req->retval) {
3757 case FW_ENOMEM:
793dad94
VP		 3758 set_bit(ACT_RETRY_NOMEM, &ep->com.history);
3759 if (ep->retry_count++ < ACT_OPEN_RETRY_COUNT) {
3760 send_fw_act_open_req(ep, atid);
3761 return;
3762 }
df561f66 3763 fallthrough;
1cab775c 3764 case FW_EADDRINUSE:
793dad94
VP		 3765 set_bit(ACT_RETRY_INUSE, &ep->com.history);
3766 if (ep->retry_count++ < ACT_OPEN_RETRY_COUNT) {
3767 send_fw_act_open_req(ep, atid);
3768 return;
3769 }
1cab775c
VP		 3770 break;
3771 default:
3772 pr_info("%s unexpected ofld conn wr retval %d\n",
3773 __func__, req->retval);
3774 break;
3775 }
793dad94
VP		 3776 pr_err("active ofld_connect_wr failure %d atid %d\n",
3777 req->retval, atid);
3778 mutex_lock(&dev->rdev.stats.lock);
3779 dev->rdev.stats.act_ofld_conn_fails++;
3780 mutex_unlock(&dev->rdev.stats.lock);
1cab775c 3781 connect_reply_upcall(ep, status2errno(req->retval));
793dad94 3782 state_set(&ep->com, DEAD);
84cc6ac6
H		 3783 if (ep->com.remote_addr.ss_family == AF_INET6) {
3784 struct sockaddr_in6 *sin6 =
170003c8 3785 (struct sockaddr_in6 *)&ep->com.local_addr;
84cc6ac6
H		 3786 cxgb4_clip_release(ep->com.dev->rdev.lldi.ports[0],
3787 (const u32 *)&sin6->sin6_addr.s6_addr, 1);
3788 }
9f5a9632 3789 xa_erase_irq(&dev->atids, atid);
793dad94
VP		 3790 cxgb4_free_atid(dev->rdev.lldi.tids, atid);
3791 dst_release(ep->dst);
3792 cxgb4_l2t_release(ep->l2t);
3793 c4iw_put_ep(&ep->com);
1cab775c
VP		 3794}
3795
3796static void passive_ofld_conn_reply(struct c4iw_dev *dev, struct sk_buff *skb,
3797 struct cpl_fw6_msg_ofld_connection_wr_rpl *req)
3798{
3799 struct sk_buff *rpl_skb;
3800 struct cpl_pass_accept_req *cpl;
3801 int ret;
3802
710a3110 3803 rpl_skb = (struct sk_buff *)(unsigned long)req->cookie;
1cab775c 3804 if (req->retval) {
4d45b757 3805 pr_err("%s passive open failure %d\n", __func__, req->retval);
793dad94
VP		 3806 mutex_lock(&dev->rdev.stats.lock);
3807 dev->rdev.stats.pas_ofld_conn_fails++;
3808 mutex_unlock(&dev->rdev.stats.lock);
1cab775c
VP		 3809 kfree_skb(rpl_skb);
3810 } else {
3811 cpl = (struct cpl_pass_accept_req *)cplhdr(rpl_skb);
3812 OPCODE_TID(cpl) = htonl(MK_OPCODE_TID(CPL_PASS_ACCEPT_REQ,
ef5d6355
VP		 3813 (__force u32) htonl(
3814 (__force u32) req->tid)));
1cab775c
VP		 3815 ret = pass_accept_req(dev, rpl_skb);
3816 if (!ret)
3817 kfree_skb(rpl_skb);
3818 }
3819 return;
3820}
3821
11a27e21
RR		 3822static inline u64 t4_tcb_get_field64(__be64 *tcb, u16 word)
3823{
3824 u64 tlo = be64_to_cpu(tcb[((31 - word) / 2)]);
3825 u64 thi = be64_to_cpu(tcb[((31 - word) / 2) - 1]);
3826 u64 t;
3827 u32 shift = 32;
3828
3829 t = (thi << shift) | (tlo >> shift);
3830
3831 return t;
3832}
3833
3834static inline u32 t4_tcb_get_field32(__be64 *tcb, u16 word, u32 mask, u32 shift)
3835{
3836 u32 v;
3837 u64 t = be64_to_cpu(tcb[(31 - word) / 2]);
3838
3839 if (word & 0x1)
3840 shift += 32;
3841 v = (t >> shift) & mask;
3842 return v;
3843}
3844
3845static int read_tcb_rpl(struct c4iw_dev *dev, struct sk_buff *skb)
3846{
3847 struct cpl_get_tcb_rpl *rpl = cplhdr(skb);
3848 __be64 *tcb = (__be64 *)(rpl + 1);
3849 unsigned int tid = GET_TID(rpl);
3850 struct c4iw_ep *ep;
3851 u64 t_flags_64;
3852 u32 rx_pdu_out;
3853
3854 ep = get_ep_from_tid(dev, tid);
3855 if (!ep)
3856 return 0;
3857 /* Examine the TF_RX_PDU_OUT (bit 49 of the t_flags) in order to
3858 * determine if there's a rx PDU feedback event pending.
3859 *
3860 * If that bit is set, it means we'll need to re-read the TCB's
3861 * rq_start value. The final value is the one present in a TCB
3862 * with the TF_RX_PDU_OUT bit cleared.
3863 */
3864
3865 t_flags_64 = t4_tcb_get_field64(tcb, TCB_T_FLAGS_W);
3866 rx_pdu_out = (t_flags_64 & TF_RX_PDU_OUT_V(1)) >> TF_RX_PDU_OUT_S;
3867
3868 c4iw_put_ep(&ep->com); /* from get_ep_from_tid() */
3869 c4iw_put_ep(&ep->com); /* from read_tcb() */
3870
3871 /* If TF_RX_PDU_OUT bit is set, re-read the TCB */
3872 if (rx_pdu_out) {
3873 if (++ep->rx_pdu_out_cnt >= 2) {
3874 WARN_ONCE(1, "tcb re-read() reached the guard limit, finishing the cleanup\n");
3875 goto cleanup;
3876 }
3877 read_tcb(ep);
3878 return 0;
3879 }
3880
c8b1f340
PBT		 3881 ep->srqe_idx = t4_tcb_get_field32(tcb, TCB_RQ_START_W, TCB_RQ_START_M,
3882 TCB_RQ_START_S);
11a27e21
RR		 3883cleanup:
3884 pr_debug("ep %p tid %u %016x\n", ep, ep->hwtid, ep->srqe_idx);
3885
3886 if (test_bit(PEER_ABORT_IN_PROGRESS, &ep->com.flags))
3887 finish_peer_abort(dev, ep);
3888 else if (test_bit(ABORT_REQ_IN_PROGRESS, &ep->com.flags))
3889 send_abort_req(ep);
3890 else
3891 WARN_ONCE(1, "unexpected state!");
3892
3893 return 0;
3894}
3895
1cab775c 3896static int deferred_fw6_msg(struct c4iw_dev *dev, struct sk_buff *skb)
2f5b48c3
SW		 3897{
3898 struct cpl_fw6_msg *rpl = cplhdr(skb);
1cab775c
VP		 3899 struct cpl_fw6_msg_ofld_connection_wr_rpl *req;
3900
3901 switch (rpl->type) {
3902 case FW6_TYPE_CQE:
3903 c4iw_ev_dispatch(dev, (struct t4_cqe *)&rpl->data[0]);
3904 break;
3905 case FW6_TYPE_OFLD_CONNECTION_WR_RPL:
3906 req = (struct cpl_fw6_msg_ofld_connection_wr_rpl *)rpl->data;
3907 switch (req->t_state) {
3908 case TCP_SYN_SENT:
3909 active_ofld_conn_reply(dev, skb, req);
3910 break;
3911 case TCP_SYN_RECV:
3912 passive_ofld_conn_reply(dev, skb, req);
3913 break;
3914 default:
3915 pr_err("%s unexpected ofld conn wr state %d\n",
3916 __func__, req->t_state);
3917 break;
3918 }
3919 break;
3920 }
3921 return 0;
3922}
3923
3924static void build_cpl_pass_accept_req(struct sk_buff *skb, int stid , u8 tos)
3925{
963cab50
H		 3926 __be32 l2info;
3927 __be16 hdr_len, vlantag, len;
3928 u16 eth_hdr_len;
3929 int tcp_hdr_len, ip_hdr_len;
1cab775c
VP		 3930 u8 intf;
3931 struct cpl_rx_pkt *cpl = cplhdr(skb);
3932 struct cpl_pass_accept_req *req;
3933 struct tcp_options_received tmp_opt;
f079af7a 3934 struct c4iw_dev *dev;
963cab50 3935 enum chip_type type;
1cab775c 3936
f079af7a 3937 dev = *((struct c4iw_dev **) (skb->cb + sizeof(void *)));
1cab775c 3938 /* Store values from cpl_rx_pkt in temporary location. */
963cab50
H		 3939 vlantag = cpl->vlan;
3940 len = cpl->len;
3941 l2info = cpl->l2info;
3942 hdr_len = cpl->hdr_len;
1cab775c
VP		 3943 intf = cpl->iff;
3944
3945 __skb_pull(skb, sizeof(*req) + sizeof(struct rss_header));
3946
3947 /*
3948 * We need to parse the TCP options from SYN packet.
3949 * to generate cpl_pass_accept_req.
3950 */
3951 memset(&tmp_opt, 0, sizeof(tmp_opt));
3952 tcp_clear_options(&tmp_opt);
eed29f17 3953 tcp_parse_options(&init_net, skb, &tmp_opt, 0, NULL);
1cab775c 3954
d58ff351 3955 req = __skb_push(skb, sizeof(*req));
1cab775c 3956 memset(req, 0, sizeof(*req));
cf7fe64a
HS		 3957 req->l2info = cpu_to_be16(SYN_INTF_V(intf) |
3958 SYN_MAC_IDX_V(RX_MACIDX_G(
963cab50 3959 be32_to_cpu(l2info))) |
cf7fe64a 3960 SYN_XACT_MATCH_F);
963cab50
H		 3961 type = dev->rdev.lldi.adapter_type;
3962 tcp_hdr_len = RX_TCPHDR_LEN_G(be16_to_cpu(hdr_len));
3963 ip_hdr_len = RX_IPHDR_LEN_G(be16_to_cpu(hdr_len));
3964 req->hdr_len =
3965 cpu_to_be32(SYN_RX_CHAN_V(RX_CHAN_G(be32_to_cpu(l2info))));
3966 if (CHELSIO_CHIP_VERSION(type) <= CHELSIO_T5) {
3967 eth_hdr_len = is_t4(type) ?
3968 RX_ETHHDR_LEN_G(be32_to_cpu(l2info)) :
3969 RX_T5_ETHHDR_LEN_G(be32_to_cpu(l2info));
3970 req->hdr_len |= cpu_to_be32(TCP_HDR_LEN_V(tcp_hdr_len) |
3971 IP_HDR_LEN_V(ip_hdr_len) |
3972 ETH_HDR_LEN_V(eth_hdr_len));
3973 } else { /* T6 and later */
3974 eth_hdr_len = RX_T6_ETHHDR_LEN_G(be32_to_cpu(l2info));
3975 req->hdr_len |= cpu_to_be32(T6_TCP_HDR_LEN_V(tcp_hdr_len) |
3976 T6_IP_HDR_LEN_V(ip_hdr_len) |
3977 T6_ETH_HDR_LEN_V(eth_hdr_len));
3978 }
3979 req->vlan = vlantag;
3980 req->len = len;
6c53e938
HS		 3981 req->tos_stid = cpu_to_be32(PASS_OPEN_TID_V(stid) |
3982 PASS_OPEN_TOS_V(tos));
1cab775c
VP		 3983 req->tcpopt.mss = htons(tmp_opt.mss_clamp);
3984 if (tmp_opt.wscale_ok)
3985 req->tcpopt.wsf = tmp_opt.snd_wscale;
3986 req->tcpopt.tstamp = tmp_opt.saw_tstamp;
3987 if (tmp_opt.sack_ok)
3988 req->tcpopt.sack = 1;
3989 OPCODE_TID(req) = htonl(MK_OPCODE_TID(CPL_PASS_ACCEPT_REQ, 0));
3990 return;
3991}
3992
3993static void send_fw_pass_open_req(struct c4iw_dev *dev, struct sk_buff *skb,
3994 __be32 laddr, __be16 lport,
3995 __be32 raddr, __be16 rport,
3996 u32 rcv_isn, u32 filter, u16 window,
3997 u32 rss_qid, u8 port_id)
3998{
3999 struct sk_buff *req_skb;
4000 struct fw_ofld_connection_wr *req;
4001 struct cpl_pass_accept_req *cpl = cplhdr(skb);
1ce1d471 4002 int ret;
1cab775c
VP		 4003
4004 req_skb = alloc_skb(sizeof(struct fw_ofld_connection_wr), GFP_KERNEL);
9ef63f31
PB		 4005 if (!req_skb)
4006 return;
de77b966 4007 req = __skb_put_zero(req_skb, sizeof(*req));
6c53e938 4008 req->op_compl = htonl(WR_OP_V(FW_OFLD_CONNECTION_WR) | FW_WR_COMPL_F);
e2ac9628 4009 req->len16_pkd = htonl(FW_WR_LEN16_V(DIV_ROUND_UP(sizeof(*req), 16)));
77a80e23 4010 req->le.version_cpl = htonl(FW_OFLD_CONNECTION_WR_CPL_F);
ef5d6355 4011 req->le.filter = (__force __be32) filter;
1cab775c
VP		 4012 req->le.lport = lport;
4013 req->le.pport = rport;
4014 req->le.u.ipv4.lip = laddr;
4015 req->le.u.ipv4.pip = raddr;
4016 req->tcb.rcv_nxt = htonl(rcv_isn + 1);
4017 req->tcb.rcv_adv = htons(window);
4018 req->tcb.t_state_to_astid =
77a80e23
HS		 4019 htonl(FW_OFLD_CONNECTION_WR_T_STATE_V(TCP_SYN_RECV) |
4020 FW_OFLD_CONNECTION_WR_RCV_SCALE_V(cpl->tcpopt.wsf) |
4021 FW_OFLD_CONNECTION_WR_ASTID_V(
6c53e938 4022 PASS_OPEN_TID_G(ntohl(cpl->tos_stid))));
1cab775c
VP		 4023
4024 /*
4025 * We store the qid in opt2 which will be used by the firmware
4026 * to send us the wr response.
4027 */
d7990b0c 4028 req->tcb.opt2 = htonl(RSS_QUEUE_V(rss_qid));
1cab775c
VP		 4029
4030 /*
4031 * We initialize the MSS index in TCB to 0xF.
4032 * So that when driver sends cpl_pass_accept_rpl
4033 * TCB picks up the correct value. If this was 0
4034 * TP will ignore any value > 0 for MSS index.
4035 */
d7990b0c 4036 req->tcb.opt0 = cpu_to_be64(MSS_IDX_V(0xF));
6198dd8d 4037 req->cookie = (uintptr_t)skb;
1cab775c
VP		 4038
4039 set_wr_txq(req_skb, CPL_PRIORITY_CONTROL, port_id);
1ce1d471
SW		 4040 ret = cxgb4_ofld_send(dev->rdev.lldi.ports[0], req_skb);
4041 if (ret < 0) {
4042 pr_err("%s - cxgb4_ofld_send error %d - dropping\n", __func__,
4043 ret);
4044 kfree_skb(skb);
4045 kfree_skb(req_skb);
4046 }
1cab775c
VP		 4047}
4048
4049/*
4050 * Handler for CPL_RX_PKT message. Need to handle cpl_rx_pkt
4051 * messages when a filter is being used instead of server to
4052 * redirect a syn packet. When packets hit filter they are redirected
4053 * to the offload queue and driver tries to establish the connection
4054 * using firmware work request.
4055 */
4056static int rx_pkt(struct c4iw_dev *dev, struct sk_buff *skb)
4057{
4058 int stid;
4059 unsigned int filter;
4060 struct ethhdr *eh = NULL;
4061 struct vlan_ethhdr *vlan_eh = NULL;
4062 struct iphdr *iph;
4063 struct tcphdr *tcph;
4064 struct rss_header *rss = (void *)skb->data;
4065 struct cpl_rx_pkt *cpl = (void *)skb->data;
4066 struct cpl_pass_accept_req *req = (void *)(rss + 1);
4067 struct l2t_entry *e;
4068 struct dst_entry *dst;
f86fac79 4069 struct c4iw_ep *lep = NULL;
1cab775c
VP		 4070 u16 window;
4071 struct port_info *pi;
4072 struct net_device *pdev;
f079af7a 4073 u16 rss_qid, eth_hdr_len;
1cab775c 4074 int step;
1cab775c
VP		 4075 struct neighbour *neigh;
4076
4077 /* Drop all non-SYN packets */
bdc590b9 4078 if (!(cpl->l2info & cpu_to_be32(RXF_SYN_F)))
1cab775c
VP		 4079 goto reject;
4080
4081 /*
4082 * Drop all packets which did not hit the filter.
4083 * Unlikely to happen.
4084 */
4085 if (!(rss->filter_hit && rss->filter_tid))
4086 goto reject;
4087
4088 /*
4089 * Calculate the server tid from filter hit index from cpl_rx_pkt.
4090 */
a4ea025f 4091 stid = (__force int) cpu_to_be32((__force u32) rss->hash_val);
1cab775c 4092
f86fac79 4093 lep = (struct c4iw_ep *)get_ep_from_stid(dev, stid);
1cab775c 4094 if (!lep) {
4d45b757
BP		 4095 pr_warn("%s connect request on invalid stid %d\n",
4096 __func__, stid);
1cab775c
VP		 4097 goto reject;
4098 }
4099
963cab50
H		 4100 switch (CHELSIO_CHIP_VERSION(dev->rdev.lldi.adapter_type)) {
4101 case CHELSIO_T4:
4102 eth_hdr_len = RX_ETHHDR_LEN_G(be32_to_cpu(cpl->l2info));
4103 break;
4104 case CHELSIO_T5:
4105 eth_hdr_len = RX_T5_ETHHDR_LEN_G(be32_to_cpu(cpl->l2info));
4106 break;
4107 case CHELSIO_T6:
4108 eth_hdr_len = RX_T6_ETHHDR_LEN_G(be32_to_cpu(cpl->l2info));
4109 break;
4110 default:
4111 pr_err("T%d Chip is not supported\n",
4112 CHELSIO_CHIP_VERSION(dev->rdev.lldi.adapter_type));
4113 goto reject;
4114 }
4115
f079af7a 4116 if (eth_hdr_len == ETH_HLEN) {
1cab775c
VP		 4117 eh = (struct ethhdr *)(req + 1);
4118 iph = (struct iphdr *)(eh + 1);
4119 } else {
4120 vlan_eh = (struct vlan_ethhdr *)(req + 1);
4121 iph = (struct iphdr *)(vlan_eh + 1);
35c4a95d 4122 __vlan_hwaccel_put_tag(skb, htons(ETH_P_8021Q), ntohs(cpl->vlan));
1cab775c
VP		 4123 }
4124
4125 if (iph->version != 0x4)
4126 goto reject;
4127
4128 tcph = (struct tcphdr *)(iph + 1);
4129 skb_set_network_header(skb, (void *)iph - (void *)rss);
4130 skb_set_transport_header(skb, (void *)tcph - (void *)rss);
4131 skb_get(skb);
4132
548ddb19 4133 pr_debug("lip 0x%x lport %u pip 0x%x pport %u tos %d\n",
a9a42886
JP		 4134 ntohl(iph->daddr), ntohs(tcph->dest), ntohl(iph->saddr),
4135 ntohs(tcph->source), iph->tos);
1cab775c 4136
804c2f3e
VP		 4137 dst = cxgb_find_route(&dev->rdev.lldi, get_real_dev,
4138 iph->daddr, iph->saddr, tcph->dest,
4139 tcph->source, iph->tos);
830662f6 4140 if (!dst) {
548ddb19 4141 pr_err("%s - failed to find dst entry!\n", __func__);
1cab775c
VP		 4142 goto reject;
4143 }
1cab775c
VP		 4144 neigh = dst_neigh_lookup_skb(dst, skb);
4145
aaa0c23c 4146 if (!neigh) {
548ddb19 4147 pr_err("%s - failed to allocate neigh!\n", __func__);
aaa0c23c
ZZ		 4148 goto free_dst;
4149 }
4150
1cab775c
VP		 4151 if (neigh->dev->flags & IFF_LOOPBACK) {
4152 pdev = ip_dev_find(&init_net, iph->daddr);
4153 e = cxgb4_l2t_get(dev->rdev.lldi.l2t, neigh,
4154 pdev, 0);
4155 pi = (struct port_info *)netdev_priv(pdev);
1cab775c
VP		 4156 dev_put(pdev);
4157 } else {
830662f6 4158 pdev = get_real_dev(neigh->dev);
1cab775c 4159 e = cxgb4_l2t_get(dev->rdev.lldi.l2t, neigh,
830662f6
VP		 4160 pdev, 0);
4161 pi = (struct port_info *)netdev_priv(pdev);
1cab775c 4162 }
ebf00060 4163 neigh_release(neigh);
1cab775c
VP		 4164 if (!e) {
4165 pr_err("%s - failed to allocate l2t entry!\n",
4166 __func__);
4167 goto free_dst;
4168 }
4169
4170 step = dev->rdev.lldi.nrxq / dev->rdev.lldi.nchan;
4171 rss_qid = dev->rdev.lldi.rxq_ids[pi->port_id * step];
ef5d6355 4172 window = (__force u16) htons((__force u16)tcph->window);
1cab775c
VP		 4173
4174 /* Calcuate filter portion for LE region. */
41b4f86c
KS		 4175 filter = (__force unsigned int) cpu_to_be32(cxgb4_select_ntuple(
4176 dev->rdev.lldi.ports[0],
4177 e));
1cab775c
VP		 4178
4179 /*
4180 * Synthesize the cpl_pass_accept_req. We have everything except the
4181 * TID. Once firmware sends a reply with TID we update the TID field
4182 * in cpl and pass it through the regular cpl_pass_accept_req path.
4183 */
4184 build_cpl_pass_accept_req(skb, stid, iph->tos);
4185 send_fw_pass_open_req(dev, skb, iph->daddr, tcph->dest, iph->saddr,
4186 tcph->source, ntohl(tcph->seq), filter, window,
4187 rss_qid, pi->port_id);
4188 cxgb4_l2t_release(e);
4189free_dst:
4190 dst_release(dst);
4191reject:
f86fac79
H		 4192 if (lep)
4193 c4iw_put_ep(&lep->com);
2f5b48c3
SW		 4194 return 0;
4195}
4196
be4c9bad
RD		 4197/*
4198 * These are the real handlers that are called from a
4199 * work queue.
4200 */
9dec900c 4201static c4iw_handler_func work_handlers[NUM_CPL_CMDS + NUM_FAKE_CPLS] = {
be4c9bad
RD		 4202 [CPL_ACT_ESTABLISH] = act_establish,
4203 [CPL_ACT_OPEN_RPL] = act_open_rpl,
4204 [CPL_RX_DATA] = rx_data,
4205 [CPL_ABORT_RPL_RSS] = abort_rpl,
4206 [CPL_ABORT_RPL] = abort_rpl,
4207 [CPL_PASS_OPEN_RPL] = pass_open_rpl,
4208 [CPL_CLOSE_LISTSRV_RPL] = close_listsrv_rpl,
4209 [CPL_PASS_ACCEPT_REQ] = pass_accept_req,
4210 [CPL_PASS_ESTABLISH] = pass_establish,
4211 [CPL_PEER_CLOSE] = peer_close,
4212 [CPL_ABORT_REQ_RSS] = peer_abort,
4213 [CPL_CLOSE_CON_RPL] = close_con_rpl,
4214 [CPL_RDMA_TERMINATE] = terminate,
2f5b48c3 4215 [CPL_FW4_ACK] = fw4_ack,
11a27e21 4216 [CPL_GET_TCB_RPL] = read_tcb_rpl,
1cab775c 4217 [CPL_FW6_MSG] = deferred_fw6_msg,
9dec900c 4218 [CPL_RX_PKT] = rx_pkt,
8d1f1a6b
H		 4219 [FAKE_CPL_PUT_EP_SAFE] = _put_ep_safe,
4220 [FAKE_CPL_PASS_PUT_EP_SAFE] = _put_pass_ep_safe
be4c9bad
RD		 4221};
4222
4223static void process_timeout(struct c4iw_ep *ep)
4224{
4225 struct c4iw_qp_attributes attrs;
4226 int abort = 1;
4227
2f5b48c3 4228 mutex_lock(&ep->com.mutex);
548ddb19 4229 pr_debug("ep %p tid %u state %d\n", ep, ep->hwtid, ep->com.state);
793dad94 4230 set_bit(TIMEDOUT, &ep->com.history);
be4c9bad
RD		 4231 switch (ep->com.state) {
4232 case MPA_REQ_SENT:
be4c9bad
RD		 4233 connect_reply_upcall(ep, -ETIMEDOUT);
4234 break;
4235 case MPA_REQ_WAIT:
ceb110a8 4236 case MPA_REQ_RCVD:
e4b76a2a 4237 case MPA_REP_SENT:
ceb110a8 4238 case FPDU_MODE:
be4c9bad
RD		 4239 break;
4240 case CLOSING:
4241 case MORIBUND:
4242 if (ep->com.cm_id && ep->com.qp) {
4243 attrs.next_state = C4IW_QP_STATE_ERROR;
4244 c4iw_modify_qp(ep->com.qp->rhp,
4245 ep->com.qp, C4IW_QP_ATTR_NEXT_STATE,
4246 &attrs, 1);
4247 }
be13b2df 4248 close_complete_upcall(ep, -ETIMEDOUT);
be4c9bad 4249 break;
b33bd0cb
SW		 4250 case ABORTING:
4251 case DEAD:
4252
4253 /*
4254 * These states are expected if the ep timed out at the same
4255 * time as another thread was calling stop_ep_timer().
4256 * So we silently do nothing for these states.
4257 */
4258 abort = 0;
4259 break;
be4c9bad 4260 default:
76f267b7 4261 WARN(1, "%s unexpected state ep %p tid %u state %u\n",
be4c9bad 4262 __func__, ep, ep->hwtid, ep->com.state);
be4c9bad
RD		 4263 abort = 0;
4264 }
cc18b939 4265 mutex_unlock(&ep->com.mutex);
69736279
H		 4266 if (abort)
4267 c4iw_ep_disconnect(ep, 1, GFP_KERNEL);
be4c9bad
RD		 4268 c4iw_put_ep(&ep->com);
4269}
4270
4271static void process_timedout_eps(void)
4272{
4273 struct c4iw_ep *ep;
4274
4275 spin_lock_irq(&timeout_lock);
4276 while (!list_empty(&timeout_list)) {
4277 struct list_head *tmp;
4278
4279 tmp = timeout_list.next;
4280 list_del(tmp);
b33bd0cb
SW		 4281 tmp->next = NULL;
4282 tmp->prev = NULL;
be4c9bad
RD		 4283 spin_unlock_irq(&timeout_lock);
4284 ep = list_entry(tmp, struct c4iw_ep, entry);
4285 process_timeout(ep);
4286 spin_lock_irq(&timeout_lock);
4287 }
4288 spin_unlock_irq(&timeout_lock);
4289}
4290
4291static void process_work(struct work_struct *work)
4292{
4293 struct sk_buff *skb = NULL;
4294 struct c4iw_dev *dev;
c1d7356c 4295 struct cpl_act_establish *rpl;
be4c9bad
RD		 4296 unsigned int opcode;
4297 int ret;
4298
b33bd0cb 4299 process_timedout_eps();
be4c9bad
RD		 4300 while ((skb = skb_dequeue(&rxq))) {
4301 rpl = cplhdr(skb);
4302 dev = *((struct c4iw_dev **) (skb->cb + sizeof(void *)));
4303 opcode = rpl->ot.opcode;
4304
ccc04cdd
DC		 4305 if (opcode >= ARRAY_SIZE(work_handlers) ||
4306 !work_handlers[opcode]) {
4307 pr_err("No handler for opcode 0x%x.\n", opcode);
be4c9bad 4308 kfree_skb(skb);
ccc04cdd
DC		 4309 } else {
4310 ret = work_handlers[opcode](dev, skb);
4311 if (!ret)
4312 kfree_skb(skb);
4313 }
b33bd0cb 4314 process_timedout_eps();
be4c9bad 4315 }
be4c9bad
RD		 4316}
4317
4318static DECLARE_WORK(skb_work, process_work);
4319
a9346abe 4320static void ep_timeout(struct timer_list *t)
be4c9bad 4321{
a9346abe 4322 struct c4iw_ep *ep = from_timer(ep, t, timer);
1ec779cc 4323 int kickit = 0;
be4c9bad
RD		 4324
4325 spin_lock(&timeout_lock);
1ec779cc 4326 if (!test_and_set_bit(TIMEOUT, &ep->com.flags)) {
b33bd0cb
SW		 4327 /*
4328 * Only insert if it is not already on the list.
4329 */
4330 if (!ep->entry.next) {
4331 list_add_tail(&ep->entry, &timeout_list);
4332 kickit = 1;
4333 }
1ec779cc 4334 }
be4c9bad 4335 spin_unlock(&timeout_lock);
1ec779cc
VP		 4336 if (kickit)
4337 queue_work(workq, &skb_work);
be4c9bad
RD		 4338}
4339
cfdda9d7
SW		 4340/*
4341 * All the CM events are handled on a work queue to have a safe context.
4342 */
4343static int sched(struct c4iw_dev *dev, struct sk_buff *skb)
4344{
4345
4346 /*
4347 * Save dev in the skb->cb area.
4348 */
4349 *((struct c4iw_dev **) (skb->cb + sizeof(void *))) = dev;
4350
4351 /*
4352 * Queue the skb and schedule the worker thread.
4353 */
4354 skb_queue_tail(&rxq, skb);
4355 queue_work(workq, &skb_work);
4356 return 0;
4357}
4358
4359static int set_tcb_rpl(struct c4iw_dev *dev, struct sk_buff *skb)
4360{
4361 struct cpl_set_tcb_rpl *rpl = cplhdr(skb);
4362
4363 if (rpl->status != CPL_ERR_NONE) {
700456bd
JP		 4364 pr_err("Unexpected SET_TCB_RPL status %u for tid %u\n",
4365 rpl->status, GET_TID(rpl));
cfdda9d7 4366 }
2f5b48c3 4367 kfree_skb(skb);
cfdda9d7
SW		 4368 return 0;
4369}
4370
be4c9bad
RD		 4371static int fw6_msg(struct c4iw_dev *dev, struct sk_buff *skb)
4372{
4373 struct cpl_fw6_msg *rpl = cplhdr(skb);
4374 struct c4iw_wr_wait *wr_waitp;
4375 int ret;
4376
548ddb19 4377 pr_debug("type %u\n", rpl->type);
be4c9bad
RD		 4378
4379 switch (rpl->type) {
5be78ee9 4380 case FW6_TYPE_WR_RPL:
be4c9bad 4381 ret = (int)((be64_to_cpu(rpl->data[0]) >> 8) & 0xff);
c8e081a1 4382 wr_waitp = (struct c4iw_wr_wait *)(__force unsigned long) rpl->data[1];
548ddb19 4383 pr_debug("wr_waitp %p ret %u\n", wr_waitp, ret);
d9594d99 4384 if (wr_waitp)
2015f26c 4385 c4iw_wake_up_deref(wr_waitp, ret ? -ret : 0);
2f5b48c3 4386 kfree_skb(skb);
be4c9bad 4387 break;
5be78ee9 4388 case FW6_TYPE_CQE:
5be78ee9 4389 case FW6_TYPE_OFLD_CONNECTION_WR_RPL:
1cab775c 4390 sched(dev, skb);
5be78ee9 4391 break;
be4c9bad 4392 default:
700456bd
JP		 4393 pr_err("%s unexpected fw6 msg type %u\n",
4394 __func__, rpl->type);
2f5b48c3 4395 kfree_skb(skb);
be4c9bad
RD		 4396 break;
4397 }
4398 return 0;
4399}
4400
8da7e7a5
SW		 4401static int peer_abort_intr(struct c4iw_dev *dev, struct sk_buff *skb)
4402{
4403 struct cpl_abort_req_rss *req = cplhdr(skb);
4404 struct c4iw_ep *ep;
8da7e7a5
SW		 4405 unsigned int tid = GET_TID(req);
4406
944661dd
H		 4407 ep = get_ep_from_tid(dev, tid);
4408 /* This EP will be dereferenced in peer_abort() */
14b92228 4409 if (!ep) {
700456bd 4410 pr_warn("Abort on non-existent endpoint, tid %d\n", tid);
14b92228
SW		 4411 kfree_skb(skb);
4412 return 0;
4413 }
b65eef0a 4414 if (cxgb_is_neg_adv(req->status)) {
f48fca4d
BP		 4415 pr_debug("Negative advice on abort- tid %u status %d (%s)\n",
4416 ep->hwtid, req->status,
a9a42886 4417 neg_adv_str(req->status));
944661dd 4418 goto out;
8da7e7a5 4419 }
548ddb19 4420 pr_debug("ep %p tid %u state %u\n", ep, ep->hwtid, ep->com.state);
8da7e7a5 4421
2015f26c 4422 c4iw_wake_up_noref(ep->com.wr_waitp, -ECONNRESET);
944661dd 4423out:
8da7e7a5
SW		 4424 sched(dev, skb);
4425 return 0;
4426}
4427
be4c9bad
RD		 4428/*
4429 * Most upcalls from the T4 Core go to sched() to
4430 * schedule the processing on a work queue.
4431 */
4432c4iw_handler_func c4iw_handlers[NUM_CPL_CMDS] = {
4433 [CPL_ACT_ESTABLISH] = sched,
4434 [CPL_ACT_OPEN_RPL] = sched,
4435 [CPL_RX_DATA] = sched,
4436 [CPL_ABORT_RPL_RSS] = sched,
4437 [CPL_ABORT_RPL] = sched,
4438 [CPL_PASS_OPEN_RPL] = sched,
4439 [CPL_CLOSE_LISTSRV_RPL] = sched,
4440 [CPL_PASS_ACCEPT_REQ] = sched,
4441 [CPL_PASS_ESTABLISH] = sched,
4442 [CPL_PEER_CLOSE] = sched,
4443 [CPL_CLOSE_CON_RPL] = sched,
8da7e7a5 4444 [CPL_ABORT_REQ_RSS] = peer_abort_intr,
be4c9bad
RD		 4445 [CPL_RDMA_TERMINATE] = sched,
4446 [CPL_FW4_ACK] = sched,
4447 [CPL_SET_TCB_RPL] = set_tcb_rpl,
11a27e21 4448 [CPL_GET_TCB_RPL] = sched,
1cab775c
VP		 4449 [CPL_FW6_MSG] = fw6_msg,
4450 [CPL_RX_PKT] = sched
be4c9bad
RD		 4451};
4452
cfdda9d7
SW		 4453int __init c4iw_cm_init(void)
4454{
4455 skb_queue_head_init(&rxq);
4456
52ee1a05 4457 workq = alloc_ordered_workqueue("iw_cxgb4", WQ_MEM_RECLAIM);
cfdda9d7
SW		 4458 if (!workq)
4459 return -ENOMEM;
4460
cfdda9d7
SW		 4461 return 0;
4462}
4463
46c1376d 4464void c4iw_cm_term(void)
cfdda9d7 4465{
be4c9bad 4466 WARN_ON(!list_empty(&timeout_list));
cfdda9d7
SW		 4467 flush_workqueue(workq);
4468 destroy_workqueue(workq);
4469}
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