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[linux-block.git] / drivers / infiniband / hw / cxgb4 / cm.c
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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 736 enum chip_type adapter_type = ep->com.dev->rdev.lldi.adapter_type;
a251c17a 737 u32 isn = (get_random_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 2470
612e0486 2471 if (!is_t4(adapter_type)) {
a251c17a 2472 u32 isn = (get_random_u32() & ~7UL) - 1;
ef016229
PBT		 2473
2474 skb = get_skb(skb, roundup(sizeof(*rpl5), 16), GFP_KERNEL);
2475 rpl5 = __skb_put_zero(skb, roundup(sizeof(*rpl5), 16));
2476 rpl = (void *)rpl5;
2477 INIT_TP_WR_CPL(rpl5, CPL_PASS_ACCEPT_RPL, ep->hwtid);
d7990b0c 2478 opt2 |= T5_OPT_2_VALID_F;
cf7fe64a 2479 opt2 |= CONG_CNTRL_V(CONG_ALG_TAHOE);
0b741047 2480 opt2 |= T5_ISS_F;
92e7ae71
HS		 2481 if (peer2peer)
2482 isn += 4;
2483 rpl5->iss = cpu_to_be32(isn);
548ddb19 2484 pr_debug("iss %u\n", be32_to_cpu(rpl5->iss));
ef016229
PBT		 2485 } else {
2486 skb = get_skb(skb, sizeof(*rpl), GFP_KERNEL);
2487 rpl = __skb_put_zero(skb, sizeof(*rpl));
2488 INIT_TP_WR_CPL(rpl, CPL_PASS_ACCEPT_RPL, ep->hwtid);
92e5011a 2489 }
cfdda9d7 2490
cfdda9d7
SW		 2491 rpl->opt0 = cpu_to_be64(opt0);
2492 rpl->opt2 = cpu_to_be32(opt2);
d4f1a5c6 2493 set_wr_txq(skb, CPL_PRIORITY_SETUP, ep->ctrlq_idx);
9dec900c 2494 t4_set_arp_err_handler(skb, ep, pass_accept_rpl_arp_failure);
cfdda9d7 2495
9dec900c 2496 return c4iw_l2t_send(&ep->com.dev->rdev, skb, ep->l2t);
cfdda9d7
SW		 2497}
2498
830662f6 2499static void reject_cr(struct c4iw_dev *dev, u32 hwtid, struct sk_buff *skb)
cfdda9d7 2500{
548ddb19 2501 pr_debug("c4iw_dev %p tid %u\n", dev, hwtid);
cfdda9d7 2502 skb_trim(skb, sizeof(struct cpl_tid_release));
cfdda9d7
SW		 2503 release_tid(&dev->rdev, hwtid, skb);
2504 return;
2505}
2506
cfdda9d7
SW		 2507static int pass_accept_req(struct c4iw_dev *dev, struct sk_buff *skb)
2508{
793dad94 2509 struct c4iw_ep *child_ep = NULL, *parent_ep;
cfdda9d7 2510 struct cpl_pass_accept_req *req = cplhdr(skb);
6c53e938 2511 unsigned int stid = PASS_OPEN_TID_G(ntohl(req->tos_stid));
cfdda9d7
SW		 2512 struct tid_info *t = dev->rdev.lldi.tids;
2513 unsigned int hwtid = GET_TID(req);
2514 struct dst_entry *dst;
830662f6 2515 __u8 local_ip[16], peer_ip[16];
cfdda9d7 2516 __be16 local_port, peer_port;
84cc6ac6 2517 struct sockaddr_in6 *sin6;
3786cf18 2518 int err;
1cab775c 2519 u16 peer_mss = ntohs(req->tcpopt.mss);
830662f6 2520 int iptype;
92e7ae71 2521 unsigned short hdrs;
7235ea22 2522 u8 tos;
cfdda9d7 2523
f86fac79 2524 parent_ep = (struct c4iw_ep *)get_ep_from_stid(dev, stid);
1cab775c 2525 if (!parent_ep) {
4d45b757
BP		 2526 pr_err("%s connect request on invalid stid %d\n",
2527 __func__, stid);
1cab775c
VP		 2528 goto reject;
2529 }
1cab775c 2530
cfdda9d7 2531 if (state_read(&parent_ep->com) != LISTEN) {
4d45b757 2532 pr_err("%s - listening ep not in LISTEN\n", __func__);
cfdda9d7
SW		 2533 goto reject;
2534 }
2535
7235ea22
SW		 2536 if (parent_ep->com.cm_id->tos_set)
2537 tos = parent_ep->com.cm_id->tos;
2538 else
2539 tos = PASS_OPEN_TOS_G(ntohl(req->tos_stid));
2540
85e42b04
VP		 2541 cxgb_get_4tuple(req, parent_ep->com.dev->rdev.lldi.adapter_type,
2542 &iptype, local_ip, peer_ip, &local_port, &peer_port);
830662f6 2543
cfdda9d7 2544 /* Find output route */
830662f6 2545 if (iptype == 4) {
548ddb19
BP		 2546 pr_debug("parent ep %p hwtid %u laddr %pI4 raddr %pI4 lport %d rport %d peer_mss %d\n"
2547 , parent_ep, hwtid,
a9a42886
JP		 2548 local_ip, peer_ip, ntohs(local_port),
2549 ntohs(peer_port), peer_mss);
804c2f3e
VP		 2550 dst = cxgb_find_route(&dev->rdev.lldi, get_real_dev,
2551 *(__be32 *)local_ip, *(__be32 *)peer_ip,
2552 local_port, peer_port, tos);
830662f6 2553 } else {
548ddb19
BP		 2554 pr_debug("parent ep %p hwtid %u laddr %pI6 raddr %pI6 lport %d rport %d peer_mss %d\n"
2555 , parent_ep, hwtid,
a9a42886
JP		 2556 local_ip, peer_ip, ntohs(local_port),
2557 ntohs(peer_port), peer_mss);
95554761
VP		 2558 dst = cxgb_find_route6(&dev->rdev.lldi, get_real_dev,
2559 local_ip, peer_ip, local_port, peer_port,
7235ea22 2560 tos,
95554761
VP		 2561 ((struct sockaddr_in6 *)
2562 &parent_ep->com.local_addr)->sin6_scope_id);
830662f6
VP		 2563 }
2564 if (!dst) {
700456bd 2565 pr_err("%s - failed to find dst entry!\n", __func__);
cfdda9d7
SW		 2566 goto reject;
2567 }
3786cf18
DM		 2568
2569 child_ep = alloc_ep(sizeof(*child_ep), GFP_KERNEL);
2570 if (!child_ep) {
700456bd 2571 pr_err("%s - failed to allocate ep entry!\n", __func__);
cfdda9d7
SW		 2572 dst_release(dst);
2573 goto reject;
2574 }
2575
963cab50 2576 err = import_ep(child_ep, iptype, peer_ip, dst, dev, false,
ac8e4c69 2577 parent_ep->com.dev->rdev.lldi.adapter_type, tos);
3786cf18 2578 if (err) {
700456bd 2579 pr_err("%s - failed to allocate l2t entry!\n", __func__);
cfdda9d7 2580 dst_release(dst);
3786cf18 2581 kfree(child_ep);
cfdda9d7
SW		 2582 goto reject;
2583 }
3786cf18 2584
98b80a2a
RR		 2585 hdrs = ((iptype == 4) ? sizeof(struct iphdr) : sizeof(struct ipv6hdr)) +
2586 sizeof(struct tcphdr) +
92e7ae71
HS		 2587 ((enable_tcp_timestamps && req->tcpopt.tstamp) ? 12 : 0);
2588 if (peer_mss && child_ep->mtu > (peer_mss + hdrs))
2589 child_ep->mtu = peer_mss + hdrs;
1cab775c 2590
4a740838
H		 2591 skb_queue_head_init(&child_ep->com.ep_skb_list);
2592 if (alloc_ep_skb_list(&child_ep->com.ep_skb_list, CN_MAX_CON_BUF))
2593 goto fail;
2594
cfdda9d7
SW		 2595 state_set(&child_ep->com, CONNECTING);
2596 child_ep->com.dev = dev;
2597 child_ep->com.cm_id = NULL;
5b6b8fe6 2598
830662f6
VP		 2599 if (iptype == 4) {
2600 struct sockaddr_in *sin = (struct sockaddr_in *)
170003c8 2601 &child_ep->com.local_addr;
5b6b8fe6 2602
b462b06e 2603 sin->sin_family = AF_INET;
830662f6
VP		 2604 sin->sin_port = local_port;
2605 sin->sin_addr.s_addr = *(__be32 *)local_ip;
5b6b8fe6
SW		 2606
2607 sin = (struct sockaddr_in *)&child_ep->com.local_addr;
b462b06e 2608 sin->sin_family = AF_INET;
5b6b8fe6
SW		 2609 sin->sin_port = ((struct sockaddr_in *)
2610 &parent_ep->com.local_addr)->sin_port;
2611 sin->sin_addr.s_addr = *(__be32 *)local_ip;
2612
170003c8 2613 sin = (struct sockaddr_in *)&child_ep->com.remote_addr;
b462b06e 2614 sin->sin_family = AF_INET;
830662f6
VP		 2615 sin->sin_port = peer_port;
2616 sin->sin_addr.s_addr = *(__be32 *)peer_ip;
2617 } else {
170003c8 2618 sin6 = (struct sockaddr_in6 *)&child_ep->com.local_addr;
830662f6
VP		 2619 sin6->sin6_family = PF_INET6;
2620 sin6->sin6_port = local_port;
2621 memcpy(sin6->sin6_addr.s6_addr, local_ip, 16);
5b6b8fe6
SW		 2622
2623 sin6 = (struct sockaddr_in6 *)&child_ep->com.local_addr;
2624 sin6->sin6_family = PF_INET6;
2625 sin6->sin6_port = ((struct sockaddr_in6 *)
2626 &parent_ep->com.local_addr)->sin6_port;
2627 memcpy(sin6->sin6_addr.s6_addr, local_ip, 16);
2628
170003c8 2629 sin6 = (struct sockaddr_in6 *)&child_ep->com.remote_addr;
830662f6
VP		 2630 sin6->sin6_family = PF_INET6;
2631 sin6->sin6_port = peer_port;
2632 memcpy(sin6->sin6_addr.s6_addr, peer_ip, 16);
2633 }
5b6b8fe6 2634
cfdda9d7
SW		 2635 c4iw_get_ep(&parent_ep->com);
2636 child_ep->parent_ep = parent_ep;
ac8e4c69 2637 child_ep->tos = tos;
cfdda9d7
SW		 2638 child_ep->dst = dst;
2639 child_ep->hwtid = hwtid;
cfdda9d7 2640
548ddb19 2641 pr_debug("tx_chan %u smac_idx %u rss_qid %u\n",
a9a42886 2642 child_ep->tx_chan, child_ep->smac_idx, child_ep->rss_qid);
cfdda9d7 2643
a9346abe 2644 timer_setup(&child_ep->timer, ep_timeout, 0);
1dec4cec
GG		 2645 cxgb4_insert_tid(t, child_ep, hwtid,
2646 child_ep->com.local_addr.ss_family);
944661dd 2647 insert_ep_tid(child_ep);
9dec900c
H		 2648 if (accept_cr(child_ep, skb, req)) {
2649 c4iw_put_ep(&parent_ep->com);
2650 release_ep_resources(child_ep);
2651 } else {
2652 set_bit(PASS_ACCEPT_REQ, &child_ep->com.history);
2653 }
84cc6ac6 2654 if (iptype == 6) {
170003c8 2655 sin6 = (struct sockaddr_in6 *)&child_ep->com.local_addr;
84cc6ac6
H		 2656 cxgb4_clip_get(child_ep->com.dev->rdev.lldi.ports[0],
2657 (const u32 *)&sin6->sin6_addr.s6_addr, 1);
2658 }
cfdda9d7 2659 goto out;
4a740838
H		 2660fail:
2661 c4iw_put_ep(&child_ep->com);
cfdda9d7 2662reject:
830662f6 2663 reject_cr(dev, hwtid, skb);
3d318605 2664out:
f86fac79
H		 2665 if (parent_ep)
2666 c4iw_put_ep(&parent_ep->com);
cfdda9d7
SW		 2667 return 0;
2668}
2669
2670static int pass_establish(struct c4iw_dev *dev, struct sk_buff *skb)
2671{
2672 struct c4iw_ep *ep;
2673 struct cpl_pass_establish *req = cplhdr(skb);
cfdda9d7 2674 unsigned int tid = GET_TID(req);
fef4422d 2675 int ret;
2e51e45c 2676 u16 tcp_opt = ntohs(req->tcp_opt);
cfdda9d7 2677
944661dd 2678 ep = get_ep_from_tid(dev, tid);
548ddb19 2679 pr_debug("ep %p tid %u\n", ep, ep->hwtid);
cfdda9d7
SW		 2680 ep->snd_seq = be32_to_cpu(req->snd_isn);
2681 ep->rcv_seq = be32_to_cpu(req->rcv_isn);
2e51e45c 2682 ep->snd_wscale = TCPOPT_SND_WSCALE_G(tcp_opt);
cfdda9d7 2683
2e51e45c 2684 pr_debug("ep %p hwtid %u tcp_opt 0x%02x\n", ep, tid, tcp_opt);
1cab775c 2685
2e51e45c 2686 set_emss(ep, tcp_opt);
cfdda9d7
SW		 2687
2688 dst_confirm(ep->dst);
fef4422d
H		 2689 mutex_lock(&ep->com.mutex);
2690 ep->com.state = MPA_REQ_WAIT;
cfdda9d7 2691 start_ep_timer(ep);
793dad94 2692 set_bit(PASS_ESTAB, &ep->com.history);
4a740838 2693 ret = send_flowc(ep);
fef4422d
H		 2694 mutex_unlock(&ep->com.mutex);
2695 if (ret)
2696 c4iw_ep_disconnect(ep, 1, GFP_KERNEL);
944661dd 2697 c4iw_put_ep(&ep->com);
cfdda9d7
SW		 2698
2699 return 0;
2700}
2701
2702static int peer_close(struct c4iw_dev *dev, struct sk_buff *skb)
2703{
2704 struct cpl_peer_close *hdr = cplhdr(skb);
2705 struct c4iw_ep *ep;
2706 struct c4iw_qp_attributes attrs;
cfdda9d7
SW		 2707 int disconnect = 1;
2708 int release = 0;
cfdda9d7 2709 unsigned int tid = GET_TID(hdr);
8da7e7a5 2710 int ret;
cfdda9d7 2711
944661dd
H		 2712 ep = get_ep_from_tid(dev, tid);
2713 if (!ep)
2714 return 0;
2715
548ddb19 2716 pr_debug("ep %p tid %u\n", ep, ep->hwtid);
cfdda9d7
SW		 2717 dst_confirm(ep->dst);
2718
793dad94 2719 set_bit(PEER_CLOSE, &ep->com.history);
2f5b48c3 2720 mutex_lock(&ep->com.mutex);
cfdda9d7
SW		 2721 switch (ep->com.state) {
2722 case MPA_REQ_WAIT:
2723 __state_set(&ep->com, CLOSING);
2724 break;
2725 case MPA_REQ_SENT:
2726 __state_set(&ep->com, CLOSING);
2727 connect_reply_upcall(ep, -ECONNRESET);
2728 break;
2729 case MPA_REQ_RCVD:
2730
2731 /*
2732 * We're gonna mark this puppy DEAD, but keep
2733 * the reference on it until the ULP accepts or
2734 * rejects the CR. Also wake up anyone waiting
2735 * in rdma connection migration (see c4iw_accept_cr()).
2736 */
2737 __state_set(&ep->com, CLOSING);
a9a42886 2738 pr_debug("waking up ep %p tid %u\n", ep, ep->hwtid);
2015f26c 2739 c4iw_wake_up_noref(ep->com.wr_waitp, -ECONNRESET);
cfdda9d7
SW		 2740 break;
2741 case MPA_REP_SENT:
2742 __state_set(&ep->com, CLOSING);
a9a42886 2743 pr_debug("waking up ep %p tid %u\n", ep, ep->hwtid);
2015f26c 2744 c4iw_wake_up_noref(ep->com.wr_waitp, -ECONNRESET);
cfdda9d7
SW		 2745 break;
2746 case FPDU_MODE:
ca5a2202 2747 start_ep_timer(ep);
cfdda9d7 2748 __state_set(&ep->com, CLOSING);
30c95c2d 2749 attrs.next_state = C4IW_QP_STATE_CLOSING;
8da7e7a5 2750 ret = c4iw_modify_qp(ep->com.qp->rhp, ep->com.qp,
30c95c2d 2751 C4IW_QP_ATTR_NEXT_STATE, &attrs, 1);
8da7e7a5
SW		 2752 if (ret != -ECONNRESET) {
2753 peer_close_upcall(ep);
2754 disconnect = 1;
2755 }
cfdda9d7
SW		 2756 break;
2757 case ABORTING:
2758 disconnect = 0;
2759 break;
2760 case CLOSING:
2761 __state_set(&ep->com, MORIBUND);
2762 disconnect = 0;
2763 break;
2764 case MORIBUND:
b33bd0cb 2765 (void)stop_ep_timer(ep);
cfdda9d7
SW		 2766 if (ep->com.cm_id && ep->com.qp) {
2767 attrs.next_state = C4IW_QP_STATE_IDLE;
2768 c4iw_modify_qp(ep->com.qp->rhp, ep->com.qp,
2769 C4IW_QP_ATTR_NEXT_STATE, &attrs, 1);
2770 }
be13b2df 2771 close_complete_upcall(ep, 0);
cfdda9d7
SW		 2772 __state_set(&ep->com, DEAD);
2773 release = 1;
2774 disconnect = 0;
2775 break;
2776 case DEAD:
2777 disconnect = 0;
2778 break;
2779 default:
ba97b749 2780 WARN_ONCE(1, "Bad endpoint state %u\n", ep->com.state);
cfdda9d7 2781 }
2f5b48c3 2782 mutex_unlock(&ep->com.mutex);
cfdda9d7
SW		 2783 if (disconnect)
2784 c4iw_ep_disconnect(ep, 0, GFP_KERNEL);
2785 if (release)
2786 release_ep_resources(ep);
944661dd 2787 c4iw_put_ep(&ep->com);
cfdda9d7
SW		 2788 return 0;
2789}
2790
11a27e21
RR		 2791static void finish_peer_abort(struct c4iw_dev *dev, struct c4iw_ep *ep)
2792{
2793 complete_cached_srq_buffers(ep, ep->srqe_idx);
2794 if (ep->com.cm_id && ep->com.qp) {
2795 struct c4iw_qp_attributes attrs;
2796
2797 attrs.next_state = C4IW_QP_STATE_ERROR;
2798 c4iw_modify_qp(ep->com.qp->rhp, ep->com.qp,
2799 C4IW_QP_ATTR_NEXT_STATE, &attrs, 1);
2800 }
2801 peer_abort_upcall(ep);
2802 release_ep_resources(ep);
2803 c4iw_put_ep(&ep->com);
2804}
2805
cfdda9d7
SW		 2806static int peer_abort(struct c4iw_dev *dev, struct sk_buff *skb)
2807{
6a0b6174 2808 struct cpl_abort_req_rss6 *req = cplhdr(skb);
cfdda9d7 2809 struct c4iw_ep *ep;
cfdda9d7
SW		 2810 struct sk_buff *rpl_skb;
2811 struct c4iw_qp_attributes attrs;
2812 int ret;
2813 int release = 0;
cfdda9d7 2814 unsigned int tid = GET_TID(req);
6a0b6174 2815 u8 status;
11a27e21 2816 u32 srqidx;
6a0b6174 2817
052f4731 2818 u32 len = roundup(sizeof(struct cpl_abort_rpl), 16);
cfdda9d7 2819
944661dd
H		 2820 ep = get_ep_from_tid(dev, tid);
2821 if (!ep)
2822 return 0;
2823
6a0b6174
RR		 2824 status = ABORT_RSS_STATUS_G(be32_to_cpu(req->srqidx_status));
2825
2826 if (cxgb_is_neg_adv(status)) {
f48fca4d 2827 pr_debug("Negative advice on abort- tid %u status %d (%s)\n",
6a0b6174 2828 ep->hwtid, status, neg_adv_str(status));
179d03bb
H		 2829 ep->stats.abort_neg_adv++;
2830 mutex_lock(&dev->rdev.stats.lock);
2831 dev->rdev.stats.neg_adv++;
2832 mutex_unlock(&dev->rdev.stats.lock);
944661dd 2833 goto deref_ep;
cfdda9d7 2834 }
6a0b6174 2835
548ddb19 2836 pr_debug("ep %p tid %u state %u\n", ep, ep->hwtid,
a9a42886 2837 ep->com.state);
793dad94 2838 set_bit(PEER_ABORT, &ep->com.history);
2f5b48c3
SW		 2839
2840 /*
2841 * Wake up any threads in rdma_init() or rdma_fini().
d2fe99e8
KS		 2842 * However, this is not needed if com state is just
2843 * MPA_REQ_SENT
2f5b48c3 2844 */
d2fe99e8 2845 if (ep->com.state != MPA_REQ_SENT)
2015f26c 2846 c4iw_wake_up_noref(ep->com.wr_waitp, -ECONNRESET);
2f5b48c3
SW		 2847
2848 mutex_lock(&ep->com.mutex);
cfdda9d7
SW		 2849 switch (ep->com.state) {
2850 case CONNECTING:
9dec900c 2851 c4iw_put_ep(&ep->parent_ep->com);
cfdda9d7
SW		 2852 break;
2853 case MPA_REQ_WAIT:
b33bd0cb 2854 (void)stop_ep_timer(ep);
cfdda9d7
SW		 2855 break;
2856 case MPA_REQ_SENT:
b33bd0cb 2857 (void)stop_ep_timer(ep);
9828ca65
SW		 2858 if (status != CPL_ERR_CONN_RESET || mpa_rev == 1 ||
2859 (mpa_rev == 2 && ep->tried_with_mpa_v1))
d2fe99e8
KS		 2860 connect_reply_upcall(ep, -ECONNRESET);
2861 else {
2862 /*
2863 * we just don't send notification upwards because we
2864 * want to retry with mpa_v1 without upper layers even
2865 * knowing it.
2866 *
2867 * do some housekeeping so as to re-initiate the
2868 * connection
2869 */
4d45b757
BP		 2870 pr_info("%s: mpa_rev=%d. Retrying with mpav1\n",
2871 __func__, mpa_rev);
d2fe99e8
KS		 2872 ep->retry_with_mpa_v1 = 1;
2873 }
cfdda9d7
SW		 2874 break;
2875 case MPA_REP_SENT:
cfdda9d7
SW		 2876 break;
2877 case MPA_REQ_RCVD:
cfdda9d7
SW		 2878 break;
2879 case MORIBUND:
2880 case CLOSING:
ca5a2202 2881 stop_ep_timer(ep);
df561f66 2882 fallthrough;
cfdda9d7 2883 case FPDU_MODE:
11a27e21
RR		 2884 if (ep->com.qp && ep->com.qp->srq) {
2885 srqidx = ABORT_RSS_SRQIDX_G(
2886 be32_to_cpu(req->srqidx_status));
2887 if (srqidx) {
c8b1f340 2888 complete_cached_srq_buffers(ep, srqidx);
11a27e21
RR		 2889 } else {
2890 /* Hold ep ref until finish_peer_abort() */
2891 c4iw_get_ep(&ep->com);
2892 __state_set(&ep->com, ABORTING);
2893 set_bit(PEER_ABORT_IN_PROGRESS, &ep->com.flags);
2894 read_tcb(ep);
2895 break;
2896
2897 }
2898 }
2899
cfdda9d7
SW		 2900 if (ep->com.cm_id && ep->com.qp) {
2901 attrs.next_state = C4IW_QP_STATE_ERROR;
2902 ret = c4iw_modify_qp(ep->com.qp->rhp,
2903 ep->com.qp, C4IW_QP_ATTR_NEXT_STATE,
2904 &attrs, 1);
2905 if (ret)
700456bd 2906 pr_err("%s - qp <- error failed!\n", __func__);
cfdda9d7
SW		 2907 }
2908 peer_abort_upcall(ep);
2909 break;
2910 case ABORTING:
2911 break;
2912 case DEAD:
4d45b757 2913 pr_warn("%s PEER_ABORT IN DEAD STATE!!!!\n", __func__);
2f5b48c3 2914 mutex_unlock(&ep->com.mutex);
944661dd 2915 goto deref_ep;
cfdda9d7 2916 default:
ba97b749 2917 WARN_ONCE(1, "Bad endpoint state %u\n", ep->com.state);
cfdda9d7
SW		 2918 break;
2919 }
2920 dst_confirm(ep->dst);
2921 if (ep->com.state != ABORTING) {
2922 __state_set(&ep->com, DEAD);
d2fe99e8
KS		 2923 /* we don't release if we want to retry with mpa_v1 */
2924 if (!ep->retry_with_mpa_v1)
2925 release = 1;
cfdda9d7 2926 }
2f5b48c3 2927 mutex_unlock(&ep->com.mutex);
cfdda9d7 2928
4a740838
H		 2929 rpl_skb = skb_dequeue(&ep->com.ep_skb_list);
2930 if (WARN_ON(!rpl_skb)) {
cfdda9d7
SW		 2931 release = 1;
2932 goto out;
2933 }
052f4731
VP		 2934
2935 cxgb_mk_abort_rpl(rpl_skb, len, ep->hwtid, ep->txq_idx);
2936
cfdda9d7
SW		 2937 c4iw_ofld_send(&ep->com.dev->rdev, rpl_skb);
2938out:
cfdda9d7
SW		 2939 if (release)
2940 release_ep_resources(ep);
fe7e0a4d 2941 else if (ep->retry_with_mpa_v1) {
84cc6ac6
H		 2942 if (ep->com.remote_addr.ss_family == AF_INET6) {
2943 struct sockaddr_in6 *sin6 =
2944 (struct sockaddr_in6 *)
170003c8 2945 &ep->com.local_addr;
84cc6ac6
H		 2946 cxgb4_clip_release(
2947 ep->com.dev->rdev.lldi.ports[0],
2948 (const u32 *)&sin6->sin6_addr.s6_addr,
2949 1);
2950 }
f254ba6a 2951 xa_erase_irq(&ep->com.dev->hwtids, ep->hwtid);
1dec4cec
GG		 2952 cxgb4_remove_tid(ep->com.dev->rdev.lldi.tids, 0, ep->hwtid,
2953 ep->com.local_addr.ss_family);
d2fe99e8
KS		 2954 dst_release(ep->dst);
2955 cxgb4_l2t_release(ep->l2t);
2956 c4iw_reconnect(ep);
2957 }
2958
944661dd
H		 2959deref_ep:
2960 c4iw_put_ep(&ep->com);
2961 /* Dereferencing ep, referenced in peer_abort_intr() */
2962 c4iw_put_ep(&ep->com);
cfdda9d7
SW		 2963 return 0;
2964}
2965
2966static int close_con_rpl(struct c4iw_dev *dev, struct sk_buff *skb)
2967{
2968 struct c4iw_ep *ep;
2969 struct c4iw_qp_attributes attrs;
2970 struct cpl_close_con_rpl *rpl = cplhdr(skb);
cfdda9d7 2971 int release = 0;
cfdda9d7 2972 unsigned int tid = GET_TID(rpl);
cfdda9d7 2973
944661dd
H		 2974 ep = get_ep_from_tid(dev, tid);
2975 if (!ep)
2976 return 0;
cfdda9d7 2977
548ddb19 2978 pr_debug("ep %p tid %u\n", ep, ep->hwtid);
cfdda9d7
SW		 2979
2980 /* The cm_id may be null if we failed to connect */
2f5b48c3 2981 mutex_lock(&ep->com.mutex);
9ca6f7cf 2982 set_bit(CLOSE_CON_RPL, &ep->com.history);
cfdda9d7
SW		 2983 switch (ep->com.state) {
2984 case CLOSING:
2985 __state_set(&ep->com, MORIBUND);
2986 break;
2987 case MORIBUND:
b33bd0cb 2988 (void)stop_ep_timer(ep);
cfdda9d7
SW		 2989 if ((ep->com.cm_id) && (ep->com.qp)) {
2990 attrs.next_state = C4IW_QP_STATE_IDLE;
2991 c4iw_modify_qp(ep->com.qp->rhp,
2992 ep->com.qp,
2993 C4IW_QP_ATTR_NEXT_STATE,
2994 &attrs, 1);
2995 }
be13b2df 2996 close_complete_upcall(ep, 0);
cfdda9d7
SW		 2997 __state_set(&ep->com, DEAD);
2998 release = 1;
2999 break;
3000 case ABORTING:
3001 case DEAD:
3002 break;
3003 default:
ba97b749 3004 WARN_ONCE(1, "Bad endpoint state %u\n", ep->com.state);
cfdda9d7
SW		 3005 break;
3006 }
2f5b48c3 3007 mutex_unlock(&ep->com.mutex);
cfdda9d7
SW		 3008 if (release)
3009 release_ep_resources(ep);
944661dd 3010 c4iw_put_ep(&ep->com);
cfdda9d7
SW		 3011 return 0;
3012}
3013
3014static int terminate(struct c4iw_dev *dev, struct sk_buff *skb)
3015{
0e42c1f4 3016 struct cpl_rdma_terminate *rpl = cplhdr(skb);
0e42c1f4
SW		 3017 unsigned int tid = GET_TID(rpl);
3018 struct c4iw_ep *ep;
3019 struct c4iw_qp_attributes attrs;
cfdda9d7 3020
944661dd 3021 ep = get_ep_from_tid(dev, tid);
cfdda9d7 3022
3352976c
RR		 3023 if (ep) {
3024 if (ep->com.qp) {
3025 pr_warn("TERM received tid %u qpid %u\n", tid,
3026 ep->com.qp->wq.sq.qid);
3027 attrs.next_state = C4IW_QP_STATE_TERMINATE;
3028 c4iw_modify_qp(ep->com.qp->rhp, ep->com.qp,
3029 C4IW_QP_ATTR_NEXT_STATE, &attrs, 1);
3030 }
3031
d219face
KE		 3032 /* As per draft-hilland-iwarp-verbs-v1.0, sec 6.2.3,
3033 * when entering the TERM state the RNIC MUST initiate a CLOSE.
3034 */
3035 c4iw_ep_disconnect(ep, 1, GFP_KERNEL);
3352976c 3036 c4iw_put_ep(&ep->com);
0e42c1f4 3037 } else
700456bd 3038 pr_warn("TERM received tid %u no ep/qp\n", tid);
cfdda9d7 3039
cfdda9d7
SW		 3040 return 0;
3041}
3042
3043/*
3044 * Upcall from the adapter indicating data has been transmitted.
3045 * For us its just the single MPA request or reply. We can now free
3046 * the skb holding the mpa message.
3047 */
3048static int fw4_ack(struct c4iw_dev *dev, struct sk_buff *skb)
3049{
3050 struct c4iw_ep *ep;
3051 struct cpl_fw4_ack *hdr = cplhdr(skb);
3052 u8 credits = hdr->credits;
3053 unsigned int tid = GET_TID(hdr);
cfdda9d7
SW		 3054
3055
944661dd
H		 3056 ep = get_ep_from_tid(dev, tid);
3057 if (!ep)
3058 return 0;
548ddb19
BP		 3059 pr_debug("ep %p tid %u credits %u\n",
3060 ep, ep->hwtid, credits);
cfdda9d7 3061 if (credits == 0) {
548ddb19
BP		 3062 pr_debug("0 credit ack ep %p tid %u state %u\n",
3063 ep, ep->hwtid, state_read(&ep->com));
944661dd 3064 goto out;
cfdda9d7
SW		 3065 }
3066
3067 dst_confirm(ep->dst);
3068 if (ep->mpa_skb) {
548ddb19
BP		 3069 pr_debug("last streaming msg ack ep %p tid %u state %u initiator %u freeing skb\n",
3070 ep, ep->hwtid, state_read(&ep->com),
3071 ep->mpa_attr.initiator ? 1 : 0);
12eb5137 3072 mutex_lock(&ep->com.mutex);
cfdda9d7
SW		 3073 kfree_skb(ep->mpa_skb);
3074 ep->mpa_skb = NULL;
e4b76a2a
H		 3075 if (test_bit(STOP_MPA_TIMER, &ep->com.flags))
3076 stop_ep_timer(ep);
3077 mutex_unlock(&ep->com.mutex);
cfdda9d7 3078 }
944661dd
H		 3079out:
3080 c4iw_put_ep(&ep->com);
cfdda9d7
SW		 3081 return 0;
3082}
3083
cfdda9d7
SW		 3084int c4iw_reject_cr(struct iw_cm_id *cm_id, const void *pdata, u8 pdata_len)
3085{
bce2841f 3086 int abort;
cfdda9d7 3087 struct c4iw_ep *ep = to_ep(cm_id);
bce2841f 3088
548ddb19 3089 pr_debug("ep %p tid %u\n", ep, ep->hwtid);
cfdda9d7 3090
a7db89eb 3091 mutex_lock(&ep->com.mutex);
e8667a9b 3092 if (ep->com.state != MPA_REQ_RCVD) {
a7db89eb 3093 mutex_unlock(&ep->com.mutex);
cfdda9d7
SW		 3094 c4iw_put_ep(&ep->com);
3095 return -ECONNRESET;
3096 }
793dad94 3097 set_bit(ULP_REJECT, &ep->com.history);
cfdda9d7 3098 if (mpa_rev == 0)
bce2841f
H		 3099 abort = 1;
3100 else
3101 abort = send_mpa_reject(ep, pdata, pdata_len);
a7db89eb 3102 mutex_unlock(&ep->com.mutex);
bce2841f
H		 3103
3104 stop_ep_timer(ep);
3105 c4iw_ep_disconnect(ep, abort != 0, GFP_KERNEL);
cfdda9d7
SW		 3106 c4iw_put_ep(&ep->com);
3107 return 0;
3108}
3109
3110int c4iw_accept_cr(struct iw_cm_id *cm_id, struct iw_cm_conn_param *conn_param)
3111{
3112 int err;
3113 struct c4iw_qp_attributes attrs;
3114 enum c4iw_qp_attr_mask mask;
3115 struct c4iw_ep *ep = to_ep(cm_id);
3116 struct c4iw_dev *h = to_c4iw_dev(cm_id->device);
3117 struct c4iw_qp *qp = get_qhp(h, conn_param->qpn);
eaf4c6d4 3118 int abort = 0;
cfdda9d7 3119
548ddb19 3120 pr_debug("ep %p tid %u\n", ep, ep->hwtid);
a7db89eb
SW		 3121
3122 mutex_lock(&ep->com.mutex);
e8667a9b 3123 if (ep->com.state != MPA_REQ_RCVD) {
cfdda9d7 3124 err = -ECONNRESET;
eaf4c6d4 3125 goto err_out;
cfdda9d7
SW		 3126 }
3127
ba97b749
SW		 3128 if (!qp) {
3129 err = -EINVAL;
3130 goto err_out;
3131 }
cfdda9d7 3132
793dad94 3133 set_bit(ULP_ACCEPT, &ep->com.history);
4c2c5763
HS		 3134 if ((conn_param->ord > cur_max_read_depth(ep->com.dev)) ||
3135 (conn_param->ird > cur_max_read_depth(ep->com.dev))) {
cfdda9d7 3136 err = -EINVAL;
eaf4c6d4 3137 goto err_abort;
cfdda9d7
SW		 3138 }
3139
d2fe99e8
KS		 3140 if (ep->mpa_attr.version == 2 && ep->mpa_attr.enhanced_rdma_conn) {
3141 if (conn_param->ord > ep->ird) {
4c2c5763 3142 if (RELAXED_IRD_NEGOTIATION) {
30b03b15 3143 conn_param->ord = ep->ird;
4c2c5763
HS		 3144 } else {
3145 ep->ird = conn_param->ird;
3146 ep->ord = conn_param->ord;
3147 send_mpa_reject(ep, conn_param->private_data,
3148 conn_param->private_data_len);
4c2c5763 3149 err = -ENOMEM;
eaf4c6d4 3150 goto err_abort;
4c2c5763 3151 }
d2fe99e8 3152 }
4c2c5763
HS		 3153 if (conn_param->ird < ep->ord) {
3154 if (RELAXED_IRD_NEGOTIATION &&
3155 ep->ord <= h->rdev.lldi.max_ordird_qp) {
3156 conn_param->ird = ep->ord;
3157 } else {
d2fe99e8 3158 err = -ENOMEM;
eaf4c6d4 3159 goto err_abort;
d2fe99e8
KS		 3160 }
3161 }
d2fe99e8 3162 }
cfdda9d7
SW		 3163 ep->ird = conn_param->ird;
3164 ep->ord = conn_param->ord;
3165
4c2c5763 3166 if (ep->mpa_attr.version == 1) {
d2fe99e8
KS		 3167 if (peer2peer && ep->ird == 0)
3168 ep->ird = 1;
4c2c5763
HS		 3169 } else {
3170 if (peer2peer &&
3171 (ep->mpa_attr.p2p_type != FW_RI_INIT_P2PTYPE_DISABLED) &&
f57b780c 3172 (p2p_type == FW_RI_INIT_P2PTYPE_READ_REQ) && ep->ird == 0)
4c2c5763
HS		 3173 ep->ird = 1;
3174 }
cfdda9d7 3175
548ddb19 3176 pr_debug("ird %d ord %d\n", ep->ird, ep->ord);
cfdda9d7 3177
d2fe99e8 3178 ep->com.cm_id = cm_id;
9ca6f7cf 3179 ref_cm_id(&ep->com);
d2fe99e8 3180 ep->com.qp = qp;
325abead 3181 ref_qp(ep);
d2fe99e8 3182
cfdda9d7
SW		 3183 /* bind QP to EP and move to RTS */
3184 attrs.mpa_attr = ep->mpa_attr;
3185 attrs.max_ird = ep->ird;
3186 attrs.max_ord = ep->ord;
3187 attrs.llp_stream_handle = ep;
3188 attrs.next_state = C4IW_QP_STATE_RTS;
3189
3190 /* bind QP and TID with INIT_WR */
3191 mask = C4IW_QP_ATTR_NEXT_STATE |
3192 C4IW_QP_ATTR_LLP_STREAM_HANDLE |
3193 C4IW_QP_ATTR_MPA_ATTR |
3194 C4IW_QP_ATTR_MAX_IRD |
3195 C4IW_QP_ATTR_MAX_ORD;
3196
3197 err = c4iw_modify_qp(ep->com.qp->rhp,
3198 ep->com.qp, mask, &attrs, 1);
3199 if (err)
eaf4c6d4 3200 goto err_deref_cm_id;
e4b76a2a
H		 3201
3202 set_bit(STOP_MPA_TIMER, &ep->com.flags);
cfdda9d7
SW		 3203 err = send_mpa_reply(ep, conn_param->private_data,
3204 conn_param->private_data_len);
3205 if (err)
eaf4c6d4 3206 goto err_deref_cm_id;
cfdda9d7 3207
a7db89eb 3208 __state_set(&ep->com, FPDU_MODE);
cfdda9d7 3209 established_upcall(ep);
a7db89eb 3210 mutex_unlock(&ep->com.mutex);
cfdda9d7
SW		 3211 c4iw_put_ep(&ep->com);
3212 return 0;
eaf4c6d4 3213err_deref_cm_id:
9ca6f7cf 3214 deref_cm_id(&ep->com);
eaf4c6d4
H		 3215err_abort:
3216 abort = 1;
3217err_out:
a7db89eb 3218 mutex_unlock(&ep->com.mutex);
eaf4c6d4
H		 3219 if (abort)
3220 c4iw_ep_disconnect(ep, 1, GFP_KERNEL);
cfdda9d7
SW		 3221 c4iw_put_ep(&ep->com);
3222 return err;
3223}
3224
830662f6
VP		 3225static int pick_local_ipaddrs(struct c4iw_dev *dev, struct iw_cm_id *cm_id)
3226{
3227 struct in_device *ind;
3228 int found = 0;
170003c8
SW		 3229 struct sockaddr_in *laddr = (struct sockaddr_in *)&cm_id->m_local_addr;
3230 struct sockaddr_in *raddr = (struct sockaddr_in *)&cm_id->m_remote_addr;
cb8f1478 3231 const struct in_ifaddr *ifa;
830662f6
VP		 3232
3233 ind = in_dev_get(dev->rdev.lldi.ports[0]);
3234 if (!ind)
3235 return -EADDRNOTAVAIL;
cb8f1478
FW		 3236 rcu_read_lock();
3237 in_dev_for_each_ifa_rcu(ifa, ind) {
3238 if (ifa->ifa_flags & IFA_F_SECONDARY)
3239 continue;
830662f6
VP		 3240 laddr->sin_addr.s_addr = ifa->ifa_address;
3241 raddr->sin_addr.s_addr = ifa->ifa_address;
3242 found = 1;
3243 break;
3244 }
cb8f1478
FW		 3245 rcu_read_unlock();
3246
830662f6
VP		 3247 in_dev_put(ind);
3248 return found ? 0 : -EADDRNOTAVAIL;
3249}
3250
3251static int get_lladdr(struct net_device *dev, struct in6_addr *addr,
3252 unsigned char banned_flags)
3253{
3254 struct inet6_dev *idev;
3255 int err = -EADDRNOTAVAIL;
3256
3257 rcu_read_lock();
3258 idev = __in6_dev_get(dev);
3259 if (idev != NULL) {
3260 struct inet6_ifaddr *ifp;
3261
3262 read_lock_bh(&idev->lock);
3263 list_for_each_entry(ifp, &idev->addr_list, if_list) {
3264 if (ifp->scope == IFA_LINK &&
3265 !(ifp->flags & banned_flags)) {
3266 memcpy(addr, &ifp->addr, 16);
3267 err = 0;
3268 break;
3269 }
3270 }
3271 read_unlock_bh(&idev->lock);
3272 }
3273 rcu_read_unlock();
3274 return err;
3275}
3276
3277static int pick_local_ip6addrs(struct c4iw_dev *dev, struct iw_cm_id *cm_id)
3278{
3f649ab7 3279 struct in6_addr addr;
170003c8
SW		 3280 struct sockaddr_in6 *la6 = (struct sockaddr_in6 *)&cm_id->m_local_addr;
3281 struct sockaddr_in6 *ra6 = (struct sockaddr_in6 *)&cm_id->m_remote_addr;
830662f6 3282
54b9a96f 3283 if (!get_lladdr(dev->rdev.lldi.ports[0], &addr, IFA_F_TENTATIVE)) {
830662f6
VP		 3284 memcpy(la6->sin6_addr.s6_addr, &addr, 16);
3285 memcpy(ra6->sin6_addr.s6_addr, &addr, 16);
3286 return 0;
3287 }
3288 return -EADDRNOTAVAIL;
3289}
3290
cfdda9d7
SW		 3291int c4iw_connect(struct iw_cm_id *cm_id, struct iw_cm_conn_param *conn_param)
3292{
cfdda9d7
SW		 3293 struct c4iw_dev *dev = to_c4iw_dev(cm_id->device);
3294 struct c4iw_ep *ep;
3786cf18 3295 int err = 0;
9eccfe10
SW		 3296 struct sockaddr_in *laddr;
3297 struct sockaddr_in *raddr;
3298 struct sockaddr_in6 *laddr6;
3299 struct sockaddr_in6 *raddr6;
830662f6
VP		 3300 __u8 *ra;
3301 int iptype;
cfdda9d7 3302
4c2c5763
HS		 3303 if ((conn_param->ord > cur_max_read_depth(dev)) ||
3304 (conn_param->ird > cur_max_read_depth(dev))) {
be4c9bad
RD		 3305 err = -EINVAL;
3306 goto out;
3307 }
cfdda9d7
SW		 3308 ep = alloc_ep(sizeof(*ep), GFP_KERNEL);
3309 if (!ep) {
700456bd 3310 pr_err("%s - cannot alloc ep\n", __func__);
cfdda9d7
SW		 3311 err = -ENOMEM;
3312 goto out;
3313 }
4a740838
H		 3314
3315 skb_queue_head_init(&ep->com.ep_skb_list);
3316 if (alloc_ep_skb_list(&ep->com.ep_skb_list, CN_MAX_CON_BUF)) {
3317 err = -ENOMEM;
3318 goto fail1;
3319 }
3320
a9346abe 3321 timer_setup(&ep->timer, ep_timeout, 0);
cfdda9d7
SW		 3322 ep->plen = conn_param->private_data_len;
3323 if (ep->plen)
3324 memcpy(ep->mpa_pkt + sizeof(struct mpa_message),
3325 conn_param->private_data, ep->plen);
3326 ep->ird = conn_param->ird;
3327 ep->ord = conn_param->ord;
3328
3329 if (peer2peer && ep->ord == 0)
3330 ep->ord = 1;
3331
cfdda9d7 3332 ep->com.cm_id = cm_id;
9ca6f7cf 3333 ref_cm_id(&ep->com);
b06f2efd 3334 cm_id->provider_data = ep;
9ca6f7cf 3335 ep->com.dev = dev;
cfdda9d7 3336 ep->com.qp = get_qhp(dev, conn_param->qpn);
830662f6 3337 if (!ep->com.qp) {
4d45b757 3338 pr_warn("%s qpn 0x%x not found!\n", __func__, conn_param->qpn);
830662f6 3339 err = -EINVAL;
4a740838 3340 goto fail2;
830662f6 3341 }
325abead 3342 ref_qp(ep);
548ddb19 3343 pr_debug("qpn 0x%x qp %p cm_id %p\n", conn_param->qpn,
a9a42886 3344 ep->com.qp, cm_id);
cfdda9d7
SW		 3345
3346 /*
3347 * Allocate an active TID to initiate a TCP connection.
3348 */
3349 ep->atid = cxgb4_alloc_atid(dev->rdev.lldi.tids, ep);
3350 if (ep->atid == -1) {
700456bd 3351 pr_err("%s - cannot alloc atid\n", __func__);
cfdda9d7 3352 err = -ENOMEM;
4a740838 3353 goto fail2;
cfdda9d7 3354 }
9f5a9632
MW		 3355 err = xa_insert_irq(&dev->atids, ep->atid, ep, GFP_KERNEL);
3356 if (err)
3357 goto fail5;
cfdda9d7 3358
170003c8 3359 memcpy(&ep->com.local_addr, &cm_id->m_local_addr,
9eccfe10 3360 sizeof(ep->com.local_addr));
170003c8 3361 memcpy(&ep->com.remote_addr, &cm_id->m_remote_addr,
9eccfe10
SW		 3362 sizeof(ep->com.remote_addr));
3363
170003c8
SW		 3364 laddr = (struct sockaddr_in *)&ep->com.local_addr;
3365 raddr = (struct sockaddr_in *)&ep->com.remote_addr;
3366 laddr6 = (struct sockaddr_in6 *)&ep->com.local_addr;
3367 raddr6 = (struct sockaddr_in6 *) &ep->com.remote_addr;
9eccfe10 3368
170003c8 3369 if (cm_id->m_remote_addr.ss_family == AF_INET) {
830662f6
VP		 3370 iptype = 4;
3371 ra = (__u8 *)&raddr->sin_addr;
cfdda9d7 3372
830662f6
VP		 3373 /*
3374 * Handle loopback requests to INADDR_ANY.
3375 */
ba987e51 3376 if (raddr->sin_addr.s_addr == htonl(INADDR_ANY)) {
830662f6
VP		 3377 err = pick_local_ipaddrs(dev, cm_id);
3378 if (err)
9067f2f0 3379 goto fail3;
830662f6
VP		 3380 }
3381
3382 /* find a route */
548ddb19
BP		 3383 pr_debug("saddr %pI4 sport 0x%x raddr %pI4 rport 0x%x\n",
3384 &laddr->sin_addr, ntohs(laddr->sin_port),
a9a42886 3385 ra, ntohs(raddr->sin_port));
804c2f3e
VP		 3386 ep->dst = cxgb_find_route(&dev->rdev.lldi, get_real_dev,
3387 laddr->sin_addr.s_addr,
3388 raddr->sin_addr.s_addr,
3389 laddr->sin_port,
3390 raddr->sin_port, cm_id->tos);
830662f6
VP		 3391 } else {
3392 iptype = 6;
3393 ra = (__u8 *)&raddr6->sin6_addr;
3394
3395 /*
3396 * Handle loopback requests to INADDR_ANY.
3397 */
3398 if (ipv6_addr_type(&raddr6->sin6_addr) == IPV6_ADDR_ANY) {
3399 err = pick_local_ip6addrs(dev, cm_id);
3400 if (err)
9067f2f0 3401 goto fail3;
830662f6
VP		 3402 }
3403
3404 /* find a route */
548ddb19
BP		 3405 pr_debug("saddr %pI6 sport 0x%x raddr %pI6 rport 0x%x\n",
3406 laddr6->sin6_addr.s6_addr,
a9a42886
JP		 3407 ntohs(laddr6->sin6_port),
3408 raddr6->sin6_addr.s6_addr, ntohs(raddr6->sin6_port));
95554761
VP		 3409 ep->dst = cxgb_find_route6(&dev->rdev.lldi, get_real_dev,
3410 laddr6->sin6_addr.s6_addr,
3411 raddr6->sin6_addr.s6_addr,
3412 laddr6->sin6_port,
c8a7eb55 3413 raddr6->sin6_port, cm_id->tos,
95554761 3414 raddr6->sin6_scope_id);
830662f6
VP		 3415 }
3416 if (!ep->dst) {
700456bd 3417 pr_err("%s - cannot find route\n", __func__);
cfdda9d7 3418 err = -EHOSTUNREACH;
4a740838 3419 goto fail3;
cfdda9d7 3420 }
cfdda9d7 3421
963cab50 3422 err = import_ep(ep, iptype, ra, ep->dst, ep->com.dev, true,
ac8e4c69 3423 ep->com.dev->rdev.lldi.adapter_type, cm_id->tos);
3786cf18 3424 if (err) {
700456bd 3425 pr_err("%s - cannot alloc l2e\n", __func__);
4a740838 3426 goto fail4;
cfdda9d7
SW		 3427 }
3428
548ddb19
BP		 3429 pr_debug("txq_idx %u tx_chan %u smac_idx %u rss_qid %u l2t_idx %u\n",
3430 ep->txq_idx, ep->tx_chan, ep->smac_idx, ep->rss_qid,
a9a42886 3431 ep->l2t->idx);
cfdda9d7
SW		 3432
3433 state_set(&ep->com, CONNECTING);
ac8e4c69 3434 ep->tos = cm_id->tos;
cfdda9d7
SW		 3435
3436 /* send connect request to rnic */
3437 err = send_connect(ep);
3438 if (!err)
3439 goto out;
3440
3441 cxgb4_l2t_release(ep->l2t);
4a740838 3442fail4:
9eccfe10 3443 dst_release(ep->dst);
4a740838 3444fail3:
9f5a9632
MW		 3445 xa_erase_irq(&ep->com.dev->atids, ep->atid);
3446fail5:
cfdda9d7 3447 cxgb4_free_atid(ep->com.dev->rdev.lldi.tids, ep->atid);
4a740838
H		 3448fail2:
3449 skb_queue_purge(&ep->com.ep_skb_list);
9ca6f7cf 3450 deref_cm_id(&ep->com);
4a740838 3451fail1:
cfdda9d7
SW		 3452 c4iw_put_ep(&ep->com);
3453out:
3454 return err;
3455}
3456
830662f6
VP		 3457static int create_server6(struct c4iw_dev *dev, struct c4iw_listen_ep *ep)
3458{
3459 int err;
9eccfe10 3460 struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *)
170003c8 3461 &ep->com.local_addr;
830662f6 3462
28de1f74
H		 3463 if (ipv6_addr_type(&sin6->sin6_addr) != IPV6_ADDR_ANY) {
3464 err = cxgb4_clip_get(ep->com.dev->rdev.lldi.ports[0],
3465 (const u32 *)&sin6->sin6_addr.s6_addr, 1);
3466 if (err)
3467 return err;
3468 }
ef885dc6 3469 c4iw_init_wr_wait(ep->com.wr_waitp);
830662f6
VP		 3470 err = cxgb4_create_server6(ep->com.dev->rdev.lldi.ports[0],
3471 ep->stid, &sin6->sin6_addr,
3472 sin6->sin6_port,
3473 ep->com.dev->rdev.lldi.rxq_ids[0]);
3474 if (!err)
3475 err = c4iw_wait_for_reply(&ep->com.dev->rdev,
ef885dc6 3476 ep->com.wr_waitp,
830662f6 3477 0, 0, __func__);
e6b11163
H		 3478 else if (err > 0)
3479 err = net_xmit_errno(err);
28de1f74
H		 3480 if (err) {
3481 cxgb4_clip_release(ep->com.dev->rdev.lldi.ports[0],
3482 (const u32 *)&sin6->sin6_addr.s6_addr, 1);
830662f6
VP		 3483 pr_err("cxgb4_create_server6/filter failed err %d stid %d laddr %pI6 lport %d\n",
3484 err, ep->stid,
3485 sin6->sin6_addr.s6_addr, ntohs(sin6->sin6_port));
28de1f74 3486 }
830662f6
VP		 3487 return err;
3488}
3489
3490static int create_server4(struct c4iw_dev *dev, struct c4iw_listen_ep *ep)
3491{
3492 int err;
9eccfe10 3493 struct sockaddr_in *sin = (struct sockaddr_in *)
170003c8 3494 &ep->com.local_addr;
830662f6
VP		 3495
3496 if (dev->rdev.lldi.enable_fw_ofld_conn) {
3497 do {
3498 err = cxgb4_create_server_filter(
3499 ep->com.dev->rdev.lldi.ports[0], ep->stid,
3500 sin->sin_addr.s_addr, sin->sin_port, 0,
3501 ep->com.dev->rdev.lldi.rxq_ids[0], 0, 0);
3502 if (err == -EBUSY) {
99718e59
H		 3503 if (c4iw_fatal_error(&ep->com.dev->rdev)) {
3504 err = -EIO;
3505 break;
3506 }
830662f6
VP		 3507 set_current_state(TASK_UNINTERRUPTIBLE);
3508 schedule_timeout(usecs_to_jiffies(100));
3509 }
3510 } while (err == -EBUSY);
3511 } else {
ef885dc6 3512 c4iw_init_wr_wait(ep->com.wr_waitp);
830662f6
VP		 3513 err = cxgb4_create_server(ep->com.dev->rdev.lldi.ports[0],
3514 ep->stid, sin->sin_addr.s_addr, sin->sin_port,
3515 0, ep->com.dev->rdev.lldi.rxq_ids[0]);
3516 if (!err)
3517 err = c4iw_wait_for_reply(&ep->com.dev->rdev,
ef885dc6 3518 ep->com.wr_waitp,
830662f6 3519 0, 0, __func__);
e6b11163
H		 3520 else if (err > 0)
3521 err = net_xmit_errno(err);
830662f6
VP		 3522 }
3523 if (err)
3524 pr_err("cxgb4_create_server/filter failed err %d stid %d laddr %pI4 lport %d\n"
3525 , err, ep->stid,
3526 &sin->sin_addr, ntohs(sin->sin_port));
3527 return err;
3528}
3529
cfdda9d7
SW		 3530int c4iw_create_listen(struct iw_cm_id *cm_id, int backlog)
3531{
3532 int err = 0;
3533 struct c4iw_dev *dev = to_c4iw_dev(cm_id->device);
3534 struct c4iw_listen_ep *ep;
3535
cfdda9d7
SW		 3536 might_sleep();
3537
3538 ep = alloc_ep(sizeof(*ep), GFP_KERNEL);
3539 if (!ep) {
700456bd 3540 pr_err("%s - cannot alloc ep\n", __func__);
cfdda9d7
SW		 3541 err = -ENOMEM;
3542 goto fail1;
3543 }
4a740838 3544 skb_queue_head_init(&ep->com.ep_skb_list);
548ddb19 3545 pr_debug("ep %p\n", ep);
cfdda9d7 3546 ep->com.cm_id = cm_id;
9ca6f7cf 3547 ref_cm_id(&ep->com);
cfdda9d7
SW		 3548 ep->com.dev = dev;
3549 ep->backlog = backlog;
170003c8 3550 memcpy(&ep->com.local_addr, &cm_id->m_local_addr,
24d44a39 3551 sizeof(ep->com.local_addr));
cfdda9d7
SW		 3552
3553 /*
3554 * Allocate a server TID.
3555 */
8c044690
KS		 3556 if (dev->rdev.lldi.enable_fw_ofld_conn &&
3557 ep->com.local_addr.ss_family == AF_INET)
830662f6 3558 ep->stid = cxgb4_alloc_sftid(dev->rdev.lldi.tids,
170003c8 3559 cm_id->m_local_addr.ss_family, ep);
1cab775c 3560 else
830662f6 3561 ep->stid = cxgb4_alloc_stid(dev->rdev.lldi.tids,
170003c8 3562 cm_id->m_local_addr.ss_family, ep);
1cab775c 3563
cfdda9d7 3564 if (ep->stid == -1) {
700456bd 3565 pr_err("%s - cannot alloc stid\n", __func__);
cfdda9d7
SW		 3566 err = -ENOMEM;
3567 goto fail2;
3568 }
401b4480
MW		 3569 err = xa_insert_irq(&dev->stids, ep->stid, ep, GFP_KERNEL);
3570 if (err)
3571 goto fail3;
9eccfe10 3572
cfdda9d7 3573 state_set(&ep->com, LISTEN);
830662f6
VP		 3574 if (ep->com.local_addr.ss_family == AF_INET)
3575 err = create_server4(dev, ep);
3576 else
3577 err = create_server6(dev, ep);
cfdda9d7
SW		 3578 if (!err) {
3579 cm_id->provider_data = ep;
3580 goto out;
3581 }
401b4480
MW		 3582 xa_erase_irq(&ep->com.dev->stids, ep->stid);
3583fail3:
830662f6
VP		 3584 cxgb4_free_stid(ep->com.dev->rdev.lldi.tids, ep->stid,
3585 ep->com.local_addr.ss_family);
cfdda9d7 3586fail2:
9ca6f7cf 3587 deref_cm_id(&ep->com);
cfdda9d7
SW		 3588 c4iw_put_ep(&ep->com);
3589fail1:
3590out:
3591 return err;
3592}
3593
3594int c4iw_destroy_listen(struct iw_cm_id *cm_id)
3595{
3596 int err;
3597 struct c4iw_listen_ep *ep = to_listen_ep(cm_id);
3598
548ddb19 3599 pr_debug("ep %p\n", ep);
cfdda9d7
SW		 3600
3601 might_sleep();
3602 state_set(&ep->com, DEAD);
830662f6
VP		 3603 if (ep->com.dev->rdev.lldi.enable_fw_ofld_conn &&
3604 ep->com.local_addr.ss_family == AF_INET) {
1cab775c
VP		 3605 err = cxgb4_remove_server_filter(
3606 ep->com.dev->rdev.lldi.ports[0], ep->stid,
3408be14 3607 ep->com.dev->rdev.lldi.rxq_ids[0], false);
1cab775c 3608 } else {
84cc6ac6 3609 struct sockaddr_in6 *sin6;
ef885dc6 3610 c4iw_init_wr_wait(ep->com.wr_waitp);
830662f6
VP		 3611 err = cxgb4_remove_server(
3612 ep->com.dev->rdev.lldi.ports[0], ep->stid,
603c4690
PBT		 3613 ep->com.dev->rdev.lldi.rxq_ids[0],
3614 ep->com.local_addr.ss_family == AF_INET6);
1cab775c
VP		 3615 if (err)
3616 goto done;
ef885dc6 3617 err = c4iw_wait_for_reply(&ep->com.dev->rdev, ep->com.wr_waitp,
1cab775c 3618 0, 0, __func__);
170003c8 3619 sin6 = (struct sockaddr_in6 *)&ep->com.local_addr;
84cc6ac6
H		 3620 cxgb4_clip_release(ep->com.dev->rdev.lldi.ports[0],
3621 (const u32 *)&sin6->sin6_addr.s6_addr, 1);
1cab775c 3622 }
401b4480 3623 xa_erase_irq(&ep->com.dev->stids, ep->stid);
830662f6
VP		 3624 cxgb4_free_stid(ep->com.dev->rdev.lldi.tids, ep->stid,
3625 ep->com.local_addr.ss_family);
cfdda9d7 3626done:
9ca6f7cf 3627 deref_cm_id(&ep->com);
cfdda9d7
SW		 3628 c4iw_put_ep(&ep->com);
3629 return err;
3630}
3631
3632int c4iw_ep_disconnect(struct c4iw_ep *ep, int abrupt, gfp_t gfp)
3633{
3634 int ret = 0;
cfdda9d7
SW		 3635 int close = 0;
3636 int fatal = 0;
3637 struct c4iw_rdev *rdev;
cfdda9d7 3638
2f5b48c3 3639 mutex_lock(&ep->com.mutex);
cfdda9d7 3640
548ddb19 3641 pr_debug("ep %p state %s, abrupt %d\n", ep,
a9a42886 3642 states[ep->com.state], abrupt);
cfdda9d7 3643
6e410d8f
H		 3644 /*
3645 * Ref the ep here in case we have fatal errors causing the
3646 * ep to be released and freed.
3647 */
3648 c4iw_get_ep(&ep->com);
3649
cfdda9d7
SW		 3650 rdev = &ep->com.dev->rdev;
3651 if (c4iw_fatal_error(rdev)) {
3652 fatal = 1;
be13b2df 3653 close_complete_upcall(ep, -EIO);
cfdda9d7
SW		 3654 ep->com.state = DEAD;
3655 }
3656 switch (ep->com.state) {
3657 case MPA_REQ_WAIT:
3658 case MPA_REQ_SENT:
3659 case MPA_REQ_RCVD:
3660 case MPA_REP_SENT:
3661 case FPDU_MODE:
4a740838 3662 case CONNECTING:
cfdda9d7
SW		 3663 close = 1;
3664 if (abrupt)
3665 ep->com.state = ABORTING;
3666 else {
3667 ep->com.state = CLOSING;
12eb5137
SW		 3668
3669 /*
3670 * if we close before we see the fw4_ack() then we fix
3671 * up the timer state since we're reusing it.
3672 */
3673 if (ep->mpa_skb &&
3674 test_bit(STOP_MPA_TIMER, &ep->com.flags)) {
3675 clear_bit(STOP_MPA_TIMER, &ep->com.flags);
3676 stop_ep_timer(ep);
3677 }
ca5a2202 3678 start_ep_timer(ep);
cfdda9d7
SW		 3679 }
3680 set_bit(CLOSE_SENT, &ep->com.flags);
3681 break;
3682 case CLOSING:
3683 if (!test_and_set_bit(CLOSE_SENT, &ep->com.flags)) {
3684 close = 1;
3685 if (abrupt) {
b33bd0cb 3686 (void)stop_ep_timer(ep);
cfdda9d7
SW		 3687 ep->com.state = ABORTING;
3688 } else
3689 ep->com.state = MORIBUND;
3690 }
3691 break;
3692 case MORIBUND:
3693 case ABORTING:
3694 case DEAD:
f48fca4d
BP		 3695 pr_debug("ignoring disconnect ep %p state %u\n",
3696 ep, ep->com.state);
cfdda9d7
SW		 3697 break;
3698 default:
ba97b749 3699 WARN_ONCE(1, "Bad endpoint state %u\n", ep->com.state);
cfdda9d7
SW		 3700 break;
3701 }
3702
cfdda9d7 3703 if (close) {
8da7e7a5 3704 if (abrupt) {
793dad94 3705 set_bit(EP_DISC_ABORT, &ep->com.history);
4a740838 3706 ret = send_abort(ep);
793dad94
VP		 3707 } else {
3708 set_bit(EP_DISC_CLOSE, &ep->com.history);
4a740838 3709 ret = send_halfclose(ep);
793dad94 3710 }
88bc230d 3711 if (ret) {
9ca6f7cf 3712 set_bit(EP_DISC_FAIL, &ep->com.history);
88bc230d
H		 3713 if (!abrupt) {
3714 stop_ep_timer(ep);
3715 close_complete_upcall(ep, -EIO);
3716 }
c00dcbaf
H		 3717 if (ep->com.qp) {
3718 struct c4iw_qp_attributes attrs;
3719
3720 attrs.next_state = C4IW_QP_STATE_ERROR;
3721 ret = c4iw_modify_qp(ep->com.qp->rhp,
3722 ep->com.qp,
3723 C4IW_QP_ATTR_NEXT_STATE,
3724 &attrs, 1);
3725 if (ret)
700456bd 3726 pr_err("%s - qp <- error failed!\n",
c00dcbaf
H		 3727 __func__);
3728 }
cfdda9d7 3729 fatal = 1;
88bc230d 3730 }
cfdda9d7 3731 }
8da7e7a5 3732 mutex_unlock(&ep->com.mutex);
6e410d8f 3733 c4iw_put_ep(&ep->com);
cfdda9d7
SW		 3734 if (fatal)
3735 release_ep_resources(ep);
3736 return ret;
3737}
3738
1cab775c
VP		 3739static void active_ofld_conn_reply(struct c4iw_dev *dev, struct sk_buff *skb,
3740 struct cpl_fw6_msg_ofld_connection_wr_rpl *req)
3741{
3742 struct c4iw_ep *ep;
793dad94 3743 int atid = be32_to_cpu(req->tid);
1cab775c 3744
ef5d6355
VP		 3745 ep = (struct c4iw_ep *)lookup_atid(dev->rdev.lldi.tids,
3746 (__force u32) req->tid);
1cab775c
VP		 3747 if (!ep)
3748 return;
3749
3750 switch (req->retval) {
3751 case FW_ENOMEM:
793dad94
VP		 3752 set_bit(ACT_RETRY_NOMEM, &ep->com.history);
3753 if (ep->retry_count++ < ACT_OPEN_RETRY_COUNT) {
3754 send_fw_act_open_req(ep, atid);
3755 return;
3756 }
df561f66 3757 fallthrough;
1cab775c 3758 case FW_EADDRINUSE:
793dad94
VP		 3759 set_bit(ACT_RETRY_INUSE, &ep->com.history);
3760 if (ep->retry_count++ < ACT_OPEN_RETRY_COUNT) {
3761 send_fw_act_open_req(ep, atid);
3762 return;
3763 }
1cab775c
VP		 3764 break;
3765 default:
3766 pr_info("%s unexpected ofld conn wr retval %d\n",
3767 __func__, req->retval);
3768 break;
3769 }
793dad94
VP		 3770 pr_err("active ofld_connect_wr failure %d atid %d\n",
3771 req->retval, atid);
3772 mutex_lock(&dev->rdev.stats.lock);
3773 dev->rdev.stats.act_ofld_conn_fails++;
3774 mutex_unlock(&dev->rdev.stats.lock);
1cab775c 3775 connect_reply_upcall(ep, status2errno(req->retval));
793dad94 3776 state_set(&ep->com, DEAD);
84cc6ac6
H		 3777 if (ep->com.remote_addr.ss_family == AF_INET6) {
3778 struct sockaddr_in6 *sin6 =
170003c8 3779 (struct sockaddr_in6 *)&ep->com.local_addr;
84cc6ac6
H		 3780 cxgb4_clip_release(ep->com.dev->rdev.lldi.ports[0],
3781 (const u32 *)&sin6->sin6_addr.s6_addr, 1);
3782 }
9f5a9632 3783 xa_erase_irq(&dev->atids, atid);
793dad94
VP		 3784 cxgb4_free_atid(dev->rdev.lldi.tids, atid);
3785 dst_release(ep->dst);
3786 cxgb4_l2t_release(ep->l2t);
3787 c4iw_put_ep(&ep->com);
1cab775c
VP		 3788}
3789
3790static void passive_ofld_conn_reply(struct c4iw_dev *dev, struct sk_buff *skb,
3791 struct cpl_fw6_msg_ofld_connection_wr_rpl *req)
3792{
3793 struct sk_buff *rpl_skb;
3794 struct cpl_pass_accept_req *cpl;
3795 int ret;
3796
710a3110 3797 rpl_skb = (struct sk_buff *)(unsigned long)req->cookie;
1cab775c 3798 if (req->retval) {
4d45b757 3799 pr_err("%s passive open failure %d\n", __func__, req->retval);
793dad94
VP		 3800 mutex_lock(&dev->rdev.stats.lock);
3801 dev->rdev.stats.pas_ofld_conn_fails++;
3802 mutex_unlock(&dev->rdev.stats.lock);
1cab775c
VP		 3803 kfree_skb(rpl_skb);
3804 } else {
3805 cpl = (struct cpl_pass_accept_req *)cplhdr(rpl_skb);
3806 OPCODE_TID(cpl) = htonl(MK_OPCODE_TID(CPL_PASS_ACCEPT_REQ,
ef5d6355
VP		 3807 (__force u32) htonl(
3808 (__force u32) req->tid)));
1cab775c
VP		 3809 ret = pass_accept_req(dev, rpl_skb);
3810 if (!ret)
3811 kfree_skb(rpl_skb);
3812 }
3813 return;
3814}
3815
11a27e21
RR		 3816static inline u64 t4_tcb_get_field64(__be64 *tcb, u16 word)
3817{
3818 u64 tlo = be64_to_cpu(tcb[((31 - word) / 2)]);
3819 u64 thi = be64_to_cpu(tcb[((31 - word) / 2) - 1]);
3820 u64 t;
3821 u32 shift = 32;
3822
3823 t = (thi << shift) | (tlo >> shift);
3824
3825 return t;
3826}
3827
3828static inline u32 t4_tcb_get_field32(__be64 *tcb, u16 word, u32 mask, u32 shift)
3829{
3830 u32 v;
3831 u64 t = be64_to_cpu(tcb[(31 - word) / 2]);
3832
3833 if (word & 0x1)
3834 shift += 32;
3835 v = (t >> shift) & mask;
3836 return v;
3837}
3838
3839static int read_tcb_rpl(struct c4iw_dev *dev, struct sk_buff *skb)
3840{
3841 struct cpl_get_tcb_rpl *rpl = cplhdr(skb);
3842 __be64 *tcb = (__be64 *)(rpl + 1);
3843 unsigned int tid = GET_TID(rpl);
3844 struct c4iw_ep *ep;
3845 u64 t_flags_64;
3846 u32 rx_pdu_out;
3847
3848 ep = get_ep_from_tid(dev, tid);
3849 if (!ep)
3850 return 0;
3851 /* Examine the TF_RX_PDU_OUT (bit 49 of the t_flags) in order to
3852 * determine if there's a rx PDU feedback event pending.
3853 *
3854 * If that bit is set, it means we'll need to re-read the TCB's
3855 * rq_start value. The final value is the one present in a TCB
3856 * with the TF_RX_PDU_OUT bit cleared.
3857 */
3858
3859 t_flags_64 = t4_tcb_get_field64(tcb, TCB_T_FLAGS_W);
3860 rx_pdu_out = (t_flags_64 & TF_RX_PDU_OUT_V(1)) >> TF_RX_PDU_OUT_S;
3861
3862 c4iw_put_ep(&ep->com); /* from get_ep_from_tid() */
3863 c4iw_put_ep(&ep->com); /* from read_tcb() */
3864
3865 /* If TF_RX_PDU_OUT bit is set, re-read the TCB */
3866 if (rx_pdu_out) {
3867 if (++ep->rx_pdu_out_cnt >= 2) {
3868 WARN_ONCE(1, "tcb re-read() reached the guard limit, finishing the cleanup\n");
3869 goto cleanup;
3870 }
3871 read_tcb(ep);
3872 return 0;
3873 }
3874
c8b1f340
PBT		 3875 ep->srqe_idx = t4_tcb_get_field32(tcb, TCB_RQ_START_W, TCB_RQ_START_M,
3876 TCB_RQ_START_S);
11a27e21
RR		 3877cleanup:
3878 pr_debug("ep %p tid %u %016x\n", ep, ep->hwtid, ep->srqe_idx);
3879
3880 if (test_bit(PEER_ABORT_IN_PROGRESS, &ep->com.flags))
3881 finish_peer_abort(dev, ep);
3882 else if (test_bit(ABORT_REQ_IN_PROGRESS, &ep->com.flags))
3883 send_abort_req(ep);
3884 else
3885 WARN_ONCE(1, "unexpected state!");
3886
3887 return 0;
3888}
3889
1cab775c 3890static int deferred_fw6_msg(struct c4iw_dev *dev, struct sk_buff *skb)
2f5b48c3
SW		 3891{
3892 struct cpl_fw6_msg *rpl = cplhdr(skb);
1cab775c
VP		 3893 struct cpl_fw6_msg_ofld_connection_wr_rpl *req;
3894
3895 switch (rpl->type) {
3896 case FW6_TYPE_CQE:
3897 c4iw_ev_dispatch(dev, (struct t4_cqe *)&rpl->data[0]);
3898 break;
3899 case FW6_TYPE_OFLD_CONNECTION_WR_RPL:
3900 req = (struct cpl_fw6_msg_ofld_connection_wr_rpl *)rpl->data;
3901 switch (req->t_state) {
3902 case TCP_SYN_SENT:
3903 active_ofld_conn_reply(dev, skb, req);
3904 break;
3905 case TCP_SYN_RECV:
3906 passive_ofld_conn_reply(dev, skb, req);
3907 break;
3908 default:
3909 pr_err("%s unexpected ofld conn wr state %d\n",
3910 __func__, req->t_state);
3911 break;
3912 }
3913 break;
3914 }
3915 return 0;
3916}
3917
3918static void build_cpl_pass_accept_req(struct sk_buff *skb, int stid , u8 tos)
3919{
963cab50
H		 3920 __be32 l2info;
3921 __be16 hdr_len, vlantag, len;
3922 u16 eth_hdr_len;
3923 int tcp_hdr_len, ip_hdr_len;
1cab775c
VP		 3924 u8 intf;
3925 struct cpl_rx_pkt *cpl = cplhdr(skb);
3926 struct cpl_pass_accept_req *req;
3927 struct tcp_options_received tmp_opt;
f079af7a 3928 struct c4iw_dev *dev;
963cab50 3929 enum chip_type type;
1cab775c 3930
f079af7a 3931 dev = *((struct c4iw_dev **) (skb->cb + sizeof(void *)));
1cab775c 3932 /* Store values from cpl_rx_pkt in temporary location. */
963cab50
H		 3933 vlantag = cpl->vlan;
3934 len = cpl->len;
3935 l2info = cpl->l2info;
3936 hdr_len = cpl->hdr_len;
1cab775c
VP		 3937 intf = cpl->iff;
3938
3939 __skb_pull(skb, sizeof(*req) + sizeof(struct rss_header));
3940
3941 /*
3942 * We need to parse the TCP options from SYN packet.
3943 * to generate cpl_pass_accept_req.
3944 */
3945 memset(&tmp_opt, 0, sizeof(tmp_opt));
3946 tcp_clear_options(&tmp_opt);
eed29f17 3947 tcp_parse_options(&init_net, skb, &tmp_opt, 0, NULL);
1cab775c 3948
d58ff351 3949 req = __skb_push(skb, sizeof(*req));
1cab775c 3950 memset(req, 0, sizeof(*req));
cf7fe64a
HS		 3951 req->l2info = cpu_to_be16(SYN_INTF_V(intf) |
3952 SYN_MAC_IDX_V(RX_MACIDX_G(
963cab50 3953 be32_to_cpu(l2info))) |
cf7fe64a 3954 SYN_XACT_MATCH_F);
963cab50
H		 3955 type = dev->rdev.lldi.adapter_type;
3956 tcp_hdr_len = RX_TCPHDR_LEN_G(be16_to_cpu(hdr_len));
3957 ip_hdr_len = RX_IPHDR_LEN_G(be16_to_cpu(hdr_len));
3958 req->hdr_len =
3959 cpu_to_be32(SYN_RX_CHAN_V(RX_CHAN_G(be32_to_cpu(l2info))));
3960 if (CHELSIO_CHIP_VERSION(type) <= CHELSIO_T5) {
3961 eth_hdr_len = is_t4(type) ?
3962 RX_ETHHDR_LEN_G(be32_to_cpu(l2info)) :
3963 RX_T5_ETHHDR_LEN_G(be32_to_cpu(l2info));
3964 req->hdr_len |= cpu_to_be32(TCP_HDR_LEN_V(tcp_hdr_len) |
3965 IP_HDR_LEN_V(ip_hdr_len) |
3966 ETH_HDR_LEN_V(eth_hdr_len));
3967 } else { /* T6 and later */
3968 eth_hdr_len = RX_T6_ETHHDR_LEN_G(be32_to_cpu(l2info));
3969 req->hdr_len |= cpu_to_be32(T6_TCP_HDR_LEN_V(tcp_hdr_len) |
3970 T6_IP_HDR_LEN_V(ip_hdr_len) |
3971 T6_ETH_HDR_LEN_V(eth_hdr_len));
3972 }
3973 req->vlan = vlantag;
3974 req->len = len;
6c53e938
HS		 3975 req->tos_stid = cpu_to_be32(PASS_OPEN_TID_V(stid) |
3976 PASS_OPEN_TOS_V(tos));
1cab775c
VP		 3977 req->tcpopt.mss = htons(tmp_opt.mss_clamp);
3978 if (tmp_opt.wscale_ok)
3979 req->tcpopt.wsf = tmp_opt.snd_wscale;
3980 req->tcpopt.tstamp = tmp_opt.saw_tstamp;
3981 if (tmp_opt.sack_ok)
3982 req->tcpopt.sack = 1;
3983 OPCODE_TID(req) = htonl(MK_OPCODE_TID(CPL_PASS_ACCEPT_REQ, 0));
3984 return;
3985}
3986
3987static void send_fw_pass_open_req(struct c4iw_dev *dev, struct sk_buff *skb,
3988 __be32 laddr, __be16 lport,
3989 __be32 raddr, __be16 rport,
3990 u32 rcv_isn, u32 filter, u16 window,
3991 u32 rss_qid, u8 port_id)
3992{
3993 struct sk_buff *req_skb;
3994 struct fw_ofld_connection_wr *req;
3995 struct cpl_pass_accept_req *cpl = cplhdr(skb);
1ce1d471 3996 int ret;
1cab775c
VP		 3997
3998 req_skb = alloc_skb(sizeof(struct fw_ofld_connection_wr), GFP_KERNEL);
9ef63f31
PB		 3999 if (!req_skb)
4000 return;
de77b966 4001 req = __skb_put_zero(req_skb, sizeof(*req));
6c53e938 4002 req->op_compl = htonl(WR_OP_V(FW_OFLD_CONNECTION_WR) | FW_WR_COMPL_F);
e2ac9628 4003 req->len16_pkd = htonl(FW_WR_LEN16_V(DIV_ROUND_UP(sizeof(*req), 16)));
77a80e23 4004 req->le.version_cpl = htonl(FW_OFLD_CONNECTION_WR_CPL_F);
ef5d6355 4005 req->le.filter = (__force __be32) filter;
1cab775c
VP		 4006 req->le.lport = lport;
4007 req->le.pport = rport;
4008 req->le.u.ipv4.lip = laddr;
4009 req->le.u.ipv4.pip = raddr;
4010 req->tcb.rcv_nxt = htonl(rcv_isn + 1);
4011 req->tcb.rcv_adv = htons(window);
4012 req->tcb.t_state_to_astid =
77a80e23
HS		 4013 htonl(FW_OFLD_CONNECTION_WR_T_STATE_V(TCP_SYN_RECV) |
4014 FW_OFLD_CONNECTION_WR_RCV_SCALE_V(cpl->tcpopt.wsf) |
4015 FW_OFLD_CONNECTION_WR_ASTID_V(
6c53e938 4016 PASS_OPEN_TID_G(ntohl(cpl->tos_stid))));
1cab775c
VP		 4017
4018 /*
4019 * We store the qid in opt2 which will be used by the firmware
4020 * to send us the wr response.
4021 */
d7990b0c 4022 req->tcb.opt2 = htonl(RSS_QUEUE_V(rss_qid));
1cab775c
VP		 4023
4024 /*
4025 * We initialize the MSS index in TCB to 0xF.
4026 * So that when driver sends cpl_pass_accept_rpl
4027 * TCB picks up the correct value. If this was 0
4028 * TP will ignore any value > 0 for MSS index.
4029 */
d7990b0c 4030 req->tcb.opt0 = cpu_to_be64(MSS_IDX_V(0xF));
6198dd8d 4031 req->cookie = (uintptr_t)skb;
1cab775c
VP		 4032
4033 set_wr_txq(req_skb, CPL_PRIORITY_CONTROL, port_id);
1ce1d471
SW		 4034 ret = cxgb4_ofld_send(dev->rdev.lldi.ports[0], req_skb);
4035 if (ret < 0) {
4036 pr_err("%s - cxgb4_ofld_send error %d - dropping\n", __func__,
4037 ret);
4038 kfree_skb(skb);
4039 kfree_skb(req_skb);
4040 }
1cab775c
VP		 4041}
4042
4043/*
4044 * Handler for CPL_RX_PKT message. Need to handle cpl_rx_pkt
4045 * messages when a filter is being used instead of server to
4046 * redirect a syn packet. When packets hit filter they are redirected
4047 * to the offload queue and driver tries to establish the connection
4048 * using firmware work request.
4049 */
4050static int rx_pkt(struct c4iw_dev *dev, struct sk_buff *skb)
4051{
4052 int stid;
4053 unsigned int filter;
4054 struct ethhdr *eh = NULL;
4055 struct vlan_ethhdr *vlan_eh = NULL;
4056 struct iphdr *iph;
4057 struct tcphdr *tcph;
4058 struct rss_header *rss = (void *)skb->data;
4059 struct cpl_rx_pkt *cpl = (void *)skb->data;
4060 struct cpl_pass_accept_req *req = (void *)(rss + 1);
4061 struct l2t_entry *e;
4062 struct dst_entry *dst;
f86fac79 4063 struct c4iw_ep *lep = NULL;
1cab775c
VP		 4064 u16 window;
4065 struct port_info *pi;
4066 struct net_device *pdev;
f079af7a 4067 u16 rss_qid, eth_hdr_len;
1cab775c 4068 int step;
1cab775c
VP		 4069 struct neighbour *neigh;
4070
4071 /* Drop all non-SYN packets */
bdc590b9 4072 if (!(cpl->l2info & cpu_to_be32(RXF_SYN_F)))
1cab775c
VP		 4073 goto reject;
4074
4075 /*
4076 * Drop all packets which did not hit the filter.
4077 * Unlikely to happen.
4078 */
4079 if (!(rss->filter_hit && rss->filter_tid))
4080 goto reject;
4081
4082 /*
4083 * Calculate the server tid from filter hit index from cpl_rx_pkt.
4084 */
a4ea025f 4085 stid = (__force int) cpu_to_be32((__force u32) rss->hash_val);
1cab775c 4086
f86fac79 4087 lep = (struct c4iw_ep *)get_ep_from_stid(dev, stid);
1cab775c 4088 if (!lep) {
4d45b757
BP		 4089 pr_warn("%s connect request on invalid stid %d\n",
4090 __func__, stid);
1cab775c
VP		 4091 goto reject;
4092 }
4093
963cab50
H		 4094 switch (CHELSIO_CHIP_VERSION(dev->rdev.lldi.adapter_type)) {
4095 case CHELSIO_T4:
4096 eth_hdr_len = RX_ETHHDR_LEN_G(be32_to_cpu(cpl->l2info));
4097 break;
4098 case CHELSIO_T5:
4099 eth_hdr_len = RX_T5_ETHHDR_LEN_G(be32_to_cpu(cpl->l2info));
4100 break;
4101 case CHELSIO_T6:
4102 eth_hdr_len = RX_T6_ETHHDR_LEN_G(be32_to_cpu(cpl->l2info));
4103 break;
4104 default:
4105 pr_err("T%d Chip is not supported\n",
4106 CHELSIO_CHIP_VERSION(dev->rdev.lldi.adapter_type));
4107 goto reject;
4108 }
4109
f079af7a 4110 if (eth_hdr_len == ETH_HLEN) {
1cab775c
VP		 4111 eh = (struct ethhdr *)(req + 1);
4112 iph = (struct iphdr *)(eh + 1);
4113 } else {
4114 vlan_eh = (struct vlan_ethhdr *)(req + 1);
4115 iph = (struct iphdr *)(vlan_eh + 1);
35c4a95d 4116 __vlan_hwaccel_put_tag(skb, htons(ETH_P_8021Q), ntohs(cpl->vlan));
1cab775c
VP		 4117 }
4118
4119 if (iph->version != 0x4)
4120 goto reject;
4121
4122 tcph = (struct tcphdr *)(iph + 1);
4123 skb_set_network_header(skb, (void *)iph - (void *)rss);
4124 skb_set_transport_header(skb, (void *)tcph - (void *)rss);
4125 skb_get(skb);
4126
548ddb19 4127 pr_debug("lip 0x%x lport %u pip 0x%x pport %u tos %d\n",
a9a42886
JP		 4128 ntohl(iph->daddr), ntohs(tcph->dest), ntohl(iph->saddr),
4129 ntohs(tcph->source), iph->tos);
1cab775c 4130
804c2f3e
VP		 4131 dst = cxgb_find_route(&dev->rdev.lldi, get_real_dev,
4132 iph->daddr, iph->saddr, tcph->dest,
4133 tcph->source, iph->tos);
830662f6 4134 if (!dst) {
548ddb19 4135 pr_err("%s - failed to find dst entry!\n", __func__);
1cab775c
VP		 4136 goto reject;
4137 }
1cab775c
VP		 4138 neigh = dst_neigh_lookup_skb(dst, skb);
4139
aaa0c23c 4140 if (!neigh) {
548ddb19 4141 pr_err("%s - failed to allocate neigh!\n", __func__);
aaa0c23c
ZZ		 4142 goto free_dst;
4143 }
4144
1cab775c
VP		 4145 if (neigh->dev->flags & IFF_LOOPBACK) {
4146 pdev = ip_dev_find(&init_net, iph->daddr);
4147 e = cxgb4_l2t_get(dev->rdev.lldi.l2t, neigh,
4148 pdev, 0);
4149 pi = (struct port_info *)netdev_priv(pdev);
1cab775c
VP		 4150 dev_put(pdev);
4151 } else {
830662f6 4152 pdev = get_real_dev(neigh->dev);
1cab775c 4153 e = cxgb4_l2t_get(dev->rdev.lldi.l2t, neigh,
830662f6
VP		 4154 pdev, 0);
4155 pi = (struct port_info *)netdev_priv(pdev);
1cab775c 4156 }
ebf00060 4157 neigh_release(neigh);
1cab775c
VP		 4158 if (!e) {
4159 pr_err("%s - failed to allocate l2t entry!\n",
4160 __func__);
4161 goto free_dst;
4162 }
4163
4164 step = dev->rdev.lldi.nrxq / dev->rdev.lldi.nchan;
4165 rss_qid = dev->rdev.lldi.rxq_ids[pi->port_id * step];
ef5d6355 4166 window = (__force u16) htons((__force u16)tcph->window);
1cab775c
VP		 4167
4168 /* Calcuate filter portion for LE region. */
41b4f86c
KS		 4169 filter = (__force unsigned int) cpu_to_be32(cxgb4_select_ntuple(
4170 dev->rdev.lldi.ports[0],
4171 e));
1cab775c
VP		 4172
4173 /*
4174 * Synthesize the cpl_pass_accept_req. We have everything except the
4175 * TID. Once firmware sends a reply with TID we update the TID field
4176 * in cpl and pass it through the regular cpl_pass_accept_req path.
4177 */
4178 build_cpl_pass_accept_req(skb, stid, iph->tos);
4179 send_fw_pass_open_req(dev, skb, iph->daddr, tcph->dest, iph->saddr,
4180 tcph->source, ntohl(tcph->seq), filter, window,
4181 rss_qid, pi->port_id);
4182 cxgb4_l2t_release(e);
4183free_dst:
4184 dst_release(dst);
4185reject:
f86fac79
H		 4186 if (lep)
4187 c4iw_put_ep(&lep->com);
2f5b48c3
SW		 4188 return 0;
4189}
4190
be4c9bad
RD		 4191/*
4192 * These are the real handlers that are called from a
4193 * work queue.
4194 */
9dec900c 4195static c4iw_handler_func work_handlers[NUM_CPL_CMDS + NUM_FAKE_CPLS] = {
be4c9bad
RD		 4196 [CPL_ACT_ESTABLISH] = act_establish,
4197 [CPL_ACT_OPEN_RPL] = act_open_rpl,
4198 [CPL_RX_DATA] = rx_data,
4199 [CPL_ABORT_RPL_RSS] = abort_rpl,
4200 [CPL_ABORT_RPL] = abort_rpl,
4201 [CPL_PASS_OPEN_RPL] = pass_open_rpl,
4202 [CPL_CLOSE_LISTSRV_RPL] = close_listsrv_rpl,
4203 [CPL_PASS_ACCEPT_REQ] = pass_accept_req,
4204 [CPL_PASS_ESTABLISH] = pass_establish,
4205 [CPL_PEER_CLOSE] = peer_close,
4206 [CPL_ABORT_REQ_RSS] = peer_abort,
4207 [CPL_CLOSE_CON_RPL] = close_con_rpl,
4208 [CPL_RDMA_TERMINATE] = terminate,
2f5b48c3 4209 [CPL_FW4_ACK] = fw4_ack,
11a27e21 4210 [CPL_GET_TCB_RPL] = read_tcb_rpl,
1cab775c 4211 [CPL_FW6_MSG] = deferred_fw6_msg,
9dec900c 4212 [CPL_RX_PKT] = rx_pkt,
8d1f1a6b
H		 4213 [FAKE_CPL_PUT_EP_SAFE] = _put_ep_safe,
4214 [FAKE_CPL_PASS_PUT_EP_SAFE] = _put_pass_ep_safe
be4c9bad
RD		 4215};
4216
4217static void process_timeout(struct c4iw_ep *ep)
4218{
4219 struct c4iw_qp_attributes attrs;
4220 int abort = 1;
4221
2f5b48c3 4222 mutex_lock(&ep->com.mutex);
548ddb19 4223 pr_debug("ep %p tid %u state %d\n", ep, ep->hwtid, ep->com.state);
793dad94 4224 set_bit(TIMEDOUT, &ep->com.history);
be4c9bad
RD		 4225 switch (ep->com.state) {
4226 case MPA_REQ_SENT:
be4c9bad
RD		 4227 connect_reply_upcall(ep, -ETIMEDOUT);
4228 break;
4229 case MPA_REQ_WAIT:
ceb110a8 4230 case MPA_REQ_RCVD:
e4b76a2a 4231 case MPA_REP_SENT:
ceb110a8 4232 case FPDU_MODE:
be4c9bad
RD		 4233 break;
4234 case CLOSING:
4235 case MORIBUND:
4236 if (ep->com.cm_id && ep->com.qp) {
4237 attrs.next_state = C4IW_QP_STATE_ERROR;
4238 c4iw_modify_qp(ep->com.qp->rhp,
4239 ep->com.qp, C4IW_QP_ATTR_NEXT_STATE,
4240 &attrs, 1);
4241 }
be13b2df 4242 close_complete_upcall(ep, -ETIMEDOUT);
be4c9bad 4243 break;
b33bd0cb
SW		 4244 case ABORTING:
4245 case DEAD:
4246
4247 /*
4248 * These states are expected if the ep timed out at the same
4249 * time as another thread was calling stop_ep_timer().
4250 * So we silently do nothing for these states.
4251 */
4252 abort = 0;
4253 break;
be4c9bad 4254 default:
76f267b7 4255 WARN(1, "%s unexpected state ep %p tid %u state %u\n",
be4c9bad 4256 __func__, ep, ep->hwtid, ep->com.state);
be4c9bad
RD		 4257 abort = 0;
4258 }
cc18b939 4259 mutex_unlock(&ep->com.mutex);
69736279
H		 4260 if (abort)
4261 c4iw_ep_disconnect(ep, 1, GFP_KERNEL);
be4c9bad
RD		 4262 c4iw_put_ep(&ep->com);
4263}
4264
4265static void process_timedout_eps(void)
4266{
4267 struct c4iw_ep *ep;
4268
4269 spin_lock_irq(&timeout_lock);
4270 while (!list_empty(&timeout_list)) {
4271 struct list_head *tmp;
4272
4273 tmp = timeout_list.next;
4274 list_del(tmp);
b33bd0cb
SW		 4275 tmp->next = NULL;
4276 tmp->prev = NULL;
be4c9bad
RD		 4277 spin_unlock_irq(&timeout_lock);
4278 ep = list_entry(tmp, struct c4iw_ep, entry);
4279 process_timeout(ep);
4280 spin_lock_irq(&timeout_lock);
4281 }
4282 spin_unlock_irq(&timeout_lock);
4283}
4284
4285static void process_work(struct work_struct *work)
4286{
4287 struct sk_buff *skb = NULL;
4288 struct c4iw_dev *dev;
c1d7356c 4289 struct cpl_act_establish *rpl;
be4c9bad
RD		 4290 unsigned int opcode;
4291 int ret;
4292
b33bd0cb 4293 process_timedout_eps();
be4c9bad
RD		 4294 while ((skb = skb_dequeue(&rxq))) {
4295 rpl = cplhdr(skb);
4296 dev = *((struct c4iw_dev **) (skb->cb + sizeof(void *)));
4297 opcode = rpl->ot.opcode;
4298
ccc04cdd
DC		 4299 if (opcode >= ARRAY_SIZE(work_handlers) ||
4300 !work_handlers[opcode]) {
4301 pr_err("No handler for opcode 0x%x.\n", opcode);
be4c9bad 4302 kfree_skb(skb);
ccc04cdd
DC		 4303 } else {
4304 ret = work_handlers[opcode](dev, skb);
4305 if (!ret)
4306 kfree_skb(skb);
4307 }
b33bd0cb 4308 process_timedout_eps();
be4c9bad 4309 }
be4c9bad
RD		 4310}
4311
4312static DECLARE_WORK(skb_work, process_work);
4313
a9346abe 4314static void ep_timeout(struct timer_list *t)
be4c9bad 4315{
a9346abe 4316 struct c4iw_ep *ep = from_timer(ep, t, timer);
1ec779cc 4317 int kickit = 0;
be4c9bad
RD		 4318
4319 spin_lock(&timeout_lock);
1ec779cc 4320 if (!test_and_set_bit(TIMEOUT, &ep->com.flags)) {
b33bd0cb
SW		 4321 /*
4322 * Only insert if it is not already on the list.
4323 */
4324 if (!ep->entry.next) {
4325 list_add_tail(&ep->entry, &timeout_list);
4326 kickit = 1;
4327 }
1ec779cc 4328 }
be4c9bad 4329 spin_unlock(&timeout_lock);
1ec779cc
VP		 4330 if (kickit)
4331 queue_work(workq, &skb_work);
be4c9bad
RD		 4332}
4333
cfdda9d7
SW		 4334/*
4335 * All the CM events are handled on a work queue to have a safe context.
4336 */
4337static int sched(struct c4iw_dev *dev, struct sk_buff *skb)
4338{
4339
4340 /*
4341 * Save dev in the skb->cb area.
4342 */
4343 *((struct c4iw_dev **) (skb->cb + sizeof(void *))) = dev;
4344
4345 /*
4346 * Queue the skb and schedule the worker thread.
4347 */
4348 skb_queue_tail(&rxq, skb);
4349 queue_work(workq, &skb_work);
4350 return 0;
4351}
4352
4353static int set_tcb_rpl(struct c4iw_dev *dev, struct sk_buff *skb)
4354{
4355 struct cpl_set_tcb_rpl *rpl = cplhdr(skb);
4356
4357 if (rpl->status != CPL_ERR_NONE) {
700456bd
JP		 4358 pr_err("Unexpected SET_TCB_RPL status %u for tid %u\n",
4359 rpl->status, GET_TID(rpl));
cfdda9d7 4360 }
2f5b48c3 4361 kfree_skb(skb);
cfdda9d7
SW		 4362 return 0;
4363}
4364
be4c9bad
RD		 4365static int fw6_msg(struct c4iw_dev *dev, struct sk_buff *skb)
4366{
4367 struct cpl_fw6_msg *rpl = cplhdr(skb);
4368 struct c4iw_wr_wait *wr_waitp;
4369 int ret;
4370
548ddb19 4371 pr_debug("type %u\n", rpl->type);
be4c9bad
RD		 4372
4373 switch (rpl->type) {
5be78ee9 4374 case FW6_TYPE_WR_RPL:
be4c9bad 4375 ret = (int)((be64_to_cpu(rpl->data[0]) >> 8) & 0xff);
c8e081a1 4376 wr_waitp = (struct c4iw_wr_wait *)(__force unsigned long) rpl->data[1];
548ddb19 4377 pr_debug("wr_waitp %p ret %u\n", wr_waitp, ret);
d9594d99 4378 if (wr_waitp)
2015f26c 4379 c4iw_wake_up_deref(wr_waitp, ret ? -ret : 0);
2f5b48c3 4380 kfree_skb(skb);
be4c9bad 4381 break;
5be78ee9 4382 case FW6_TYPE_CQE:
5be78ee9 4383 case FW6_TYPE_OFLD_CONNECTION_WR_RPL:
1cab775c 4384 sched(dev, skb);
5be78ee9 4385 break;
be4c9bad 4386 default:
700456bd
JP		 4387 pr_err("%s unexpected fw6 msg type %u\n",
4388 __func__, rpl->type);
2f5b48c3 4389 kfree_skb(skb);
be4c9bad
RD		 4390 break;
4391 }
4392 return 0;
4393}
4394
8da7e7a5
SW		 4395static int peer_abort_intr(struct c4iw_dev *dev, struct sk_buff *skb)
4396{
4397 struct cpl_abort_req_rss *req = cplhdr(skb);
4398 struct c4iw_ep *ep;
8da7e7a5
SW		 4399 unsigned int tid = GET_TID(req);
4400
944661dd
H		 4401 ep = get_ep_from_tid(dev, tid);
4402 /* This EP will be dereferenced in peer_abort() */
14b92228 4403 if (!ep) {
700456bd 4404 pr_warn("Abort on non-existent endpoint, tid %d\n", tid);
14b92228
SW		 4405 kfree_skb(skb);
4406 return 0;
4407 }
b65eef0a 4408 if (cxgb_is_neg_adv(req->status)) {
f48fca4d
BP		 4409 pr_debug("Negative advice on abort- tid %u status %d (%s)\n",
4410 ep->hwtid, req->status,
a9a42886 4411 neg_adv_str(req->status));
944661dd 4412 goto out;
8da7e7a5 4413 }
548ddb19 4414 pr_debug("ep %p tid %u state %u\n", ep, ep->hwtid, ep->com.state);
8da7e7a5 4415
2015f26c 4416 c4iw_wake_up_noref(ep->com.wr_waitp, -ECONNRESET);
944661dd 4417out:
8da7e7a5
SW		 4418 sched(dev, skb);
4419 return 0;
4420}
4421
be4c9bad
RD		 4422/*
4423 * Most upcalls from the T4 Core go to sched() to
4424 * schedule the processing on a work queue.
4425 */
4426c4iw_handler_func c4iw_handlers[NUM_CPL_CMDS] = {
4427 [CPL_ACT_ESTABLISH] = sched,
4428 [CPL_ACT_OPEN_RPL] = sched,
4429 [CPL_RX_DATA] = sched,
4430 [CPL_ABORT_RPL_RSS] = sched,
4431 [CPL_ABORT_RPL] = sched,
4432 [CPL_PASS_OPEN_RPL] = sched,
4433 [CPL_CLOSE_LISTSRV_RPL] = sched,
4434 [CPL_PASS_ACCEPT_REQ] = sched,
4435 [CPL_PASS_ESTABLISH] = sched,
4436 [CPL_PEER_CLOSE] = sched,
4437 [CPL_CLOSE_CON_RPL] = sched,
8da7e7a5 4438 [CPL_ABORT_REQ_RSS] = peer_abort_intr,
be4c9bad
RD		 4439 [CPL_RDMA_TERMINATE] = sched,
4440 [CPL_FW4_ACK] = sched,
4441 [CPL_SET_TCB_RPL] = set_tcb_rpl,
11a27e21 4442 [CPL_GET_TCB_RPL] = sched,
1cab775c
VP		 4443 [CPL_FW6_MSG] = fw6_msg,
4444 [CPL_RX_PKT] = sched
be4c9bad
RD		 4445};
4446
cfdda9d7
SW		 4447int __init c4iw_cm_init(void)
4448{
4449 skb_queue_head_init(&rxq);
4450
52ee1a05 4451 workq = alloc_ordered_workqueue("iw_cxgb4", WQ_MEM_RECLAIM);
cfdda9d7
SW		 4452 if (!workq)
4453 return -ENOMEM;
4454
cfdda9d7
SW		 4455 return 0;
4456}
4457
46c1376d 4458void c4iw_cm_term(void)
cfdda9d7 4459{
be4c9bad 4460 WARN_ON(!list_empty(&timeout_list));
cfdda9d7
SW		 4461 destroy_workqueue(workq);
4462}
Linux 6.x block layer and io_uring tree(s)