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Merge remote-tracking branches 'asoc/topic/msm8916', 'asoc/topic/mtk', 'asoc/topic...
[mirror_ubuntu-jammy-kernel.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
b52fe09e 80static int dack_mode = 1;
ba6d3925 81module_param(dack_mode, int, 0644);
b52fe09e 82MODULE_PARM_DESC(dack_mode, "Delayed ack mode (default=1)");
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
102int c4iw_debug;
103module_param(c4iw_debug, int, 0644);
a9a42886 104MODULE_PARM_DESC(c4iw_debug, "obsolete");
cfdda9d7 105
df2d5130 106static int peer2peer = 1;
cfdda9d7 107module_param(peer2peer, int, 0644);
df2d5130 108MODULE_PARM_DESC(peer2peer, "Support peer2peer ULPs (default=1)");
cfdda9d7
SW		 109
110static int p2p_type = FW_RI_INIT_P2PTYPE_READ_REQ;
111module_param(p2p_type, int, 0644);
112MODULE_PARM_DESC(p2p_type, "RDMAP opcode to use for the RTR message: "
113 "1=RDMA_READ 0=RDMA_WRITE (default 1)");
114
115static int ep_timeout_secs = 60;
116module_param(ep_timeout_secs, int, 0644);
117MODULE_PARM_DESC(ep_timeout_secs, "CM Endpoint operation timeout "
118 "in seconds (default=60)");
119
b8ac3112 120static int mpa_rev = 2;
cfdda9d7
SW		 121module_param(mpa_rev, int, 0644);
122MODULE_PARM_DESC(mpa_rev, "MPA Revision, 0 supports amso1100, "
ccd2c30b 123 "1 is RFC5044 spec compliant, 2 is IETF MPA Peer Connect Draft"
b8ac3112 124 " compliant (default=2)");
cfdda9d7
SW		 125
126static int markers_enabled;
127module_param(markers_enabled, int, 0644);
128MODULE_PARM_DESC(markers_enabled, "Enable MPA MARKERS (default(0)=disabled)");
129
130static int crc_enabled = 1;
131module_param(crc_enabled, int, 0644);
132MODULE_PARM_DESC(crc_enabled, "Enable MPA CRC (default(1)=enabled)");
133
134static int rcv_win = 256 * 1024;
135module_param(rcv_win, int, 0644);
136MODULE_PARM_DESC(rcv_win, "TCP receive window in bytes (default=256KB)");
137
98ae68b7 138static int snd_win = 128 * 1024;
cfdda9d7 139module_param(snd_win, int, 0644);
98ae68b7 140MODULE_PARM_DESC(snd_win, "TCP send window in bytes (default=128KB)");
cfdda9d7 141
cfdda9d7 142static struct workqueue_struct *workq;
cfdda9d7
SW		 143
144static struct sk_buff_head rxq;
cfdda9d7
SW		 145
146static struct sk_buff *get_skb(struct sk_buff *skb, int len, gfp_t gfp);
147static void ep_timeout(unsigned long arg);
148static void connect_reply_upcall(struct c4iw_ep *ep, int status);
9dec900c 149static int sched(struct c4iw_dev *dev, struct sk_buff *skb);
cfdda9d7 150
be4c9bad
RD		 151static LIST_HEAD(timeout_list);
152static spinlock_t timeout_lock;
153
9ca6f7cf
H		 154static void deref_cm_id(struct c4iw_ep_common *epc)
155{
156 epc->cm_id->rem_ref(epc->cm_id);
157 epc->cm_id = NULL;
158 set_bit(CM_ID_DEREFED, &epc->history);
159}
160
161static void ref_cm_id(struct c4iw_ep_common *epc)
162{
163 set_bit(CM_ID_REFED, &epc->history);
164 epc->cm_id->add_ref(epc->cm_id);
165}
166
325abead
VP		 167static void deref_qp(struct c4iw_ep *ep)
168{
169 c4iw_qp_rem_ref(&ep->com.qp->ibqp);
170 clear_bit(QP_REFERENCED, &ep->com.flags);
9ca6f7cf 171 set_bit(QP_DEREFED, &ep->com.history);
325abead
VP		 172}
173
174static void ref_qp(struct c4iw_ep *ep)
175{
176 set_bit(QP_REFERENCED, &ep->com.flags);
9ca6f7cf 177 set_bit(QP_REFED, &ep->com.history);
325abead
VP		 178 c4iw_qp_add_ref(&ep->com.qp->ibqp);
179}
180
cfdda9d7
SW		 181static void start_ep_timer(struct c4iw_ep *ep)
182{
a9a42886 183 pr_debug("%s ep %p\n", __func__, ep);
cfdda9d7 184 if (timer_pending(&ep->timer)) {
1ec779cc
VP		 185 pr_err("%s timer already started! ep %p\n",
186 __func__, ep);
187 return;
188 }
189 clear_bit(TIMEOUT, &ep->com.flags);
190 c4iw_get_ep(&ep->com);
cfdda9d7
SW		 191 ep->timer.expires = jiffies + ep_timeout_secs * HZ;
192 ep->timer.data = (unsigned long)ep;
193 ep->timer.function = ep_timeout;
194 add_timer(&ep->timer);
195}
196
b33bd0cb 197static int stop_ep_timer(struct c4iw_ep *ep)
cfdda9d7 198{
a9a42886 199 pr_debug("%s ep %p stopping\n", __func__, ep);
cfdda9d7 200 del_timer_sync(&ep->timer);
b33bd0cb 201 if (!test_and_set_bit(TIMEOUT, &ep->com.flags)) {
1ec779cc 202 c4iw_put_ep(&ep->com);
b33bd0cb
SW		 203 return 0;
204 }
205 return 1;
cfdda9d7
SW		 206}
207
208static int c4iw_l2t_send(struct c4iw_rdev *rdev, struct sk_buff *skb,
209 struct l2t_entry *l2e)
210{
211 int error = 0;
212
213 if (c4iw_fatal_error(rdev)) {
214 kfree_skb(skb);
a9a42886 215 pr_debug("%s - device in error state - dropping\n", __func__);
cfdda9d7
SW		 216 return -EIO;
217 }
218 error = cxgb4_l2t_send(rdev->lldi.ports[0], skb, l2e);
219 if (error < 0)
220 kfree_skb(skb);
caa6c9f2
H		 221 else if (error == NET_XMIT_DROP)
222 return -ENOMEM;
74594861 223 return error < 0 ? error : 0;
cfdda9d7
SW		 224}
225
226int c4iw_ofld_send(struct c4iw_rdev *rdev, struct sk_buff *skb)
227{
228 int error = 0;
229
230 if (c4iw_fatal_error(rdev)) {
231 kfree_skb(skb);
a9a42886 232 pr_debug("%s - device in error state - dropping\n", __func__);
cfdda9d7
SW		 233 return -EIO;
234 }
235 error = cxgb4_ofld_send(rdev->lldi.ports[0], skb);
236 if (error < 0)
237 kfree_skb(skb);
74594861 238 return error < 0 ? error : 0;
cfdda9d7
SW		 239}
240
241static void release_tid(struct c4iw_rdev *rdev, u32 hwtid, struct sk_buff *skb)
242{
a1a23454 243 u32 len = roundup(sizeof(struct cpl_tid_release), 16);
cfdda9d7 244
a1a23454 245 skb = get_skb(skb, len, GFP_KERNEL);
cfdda9d7
SW		 246 if (!skb)
247 return;
a1a23454
VP		 248
249 cxgb_mk_tid_release(skb, len, hwtid, 0);
cfdda9d7
SW		 250 c4iw_ofld_send(rdev, skb);
251 return;
252}
253
254static void set_emss(struct c4iw_ep *ep, u16 opt)
255{
6c53e938 256 ep->emss = ep->com.dev->rdev.lldi.mtus[TCPOPT_MSS_G(opt)] -
04524a47
H		 257 ((AF_INET == ep->com.remote_addr.ss_family) ?
258 sizeof(struct iphdr) : sizeof(struct ipv6hdr)) -
259 sizeof(struct tcphdr);
cfdda9d7 260 ep->mss = ep->emss;
6c53e938 261 if (TCPOPT_TSTAMP_G(opt))
04524a47 262 ep->emss -= round_up(TCPOLEN_TIMESTAMP, 4);
cfdda9d7
SW		 263 if (ep->emss < 128)
264 ep->emss = 128;
92e7ae71 265 if (ep->emss & 7)
a9a42886
JP		 266 pr_debug("Warning: misaligned mtu idx %u mss %u emss=%u\n",
267 TCPOPT_MSS_G(opt), ep->mss, ep->emss);
268 pr_debug("%s mss_idx %u mss %u emss=%u\n", __func__, TCPOPT_MSS_G(opt),
269 ep->mss, ep->emss);
cfdda9d7
SW		 270}
271
272static enum c4iw_ep_state state_read(struct c4iw_ep_common *epc)
273{
cfdda9d7
SW		 274 enum c4iw_ep_state state;
275
2f5b48c3 276 mutex_lock(&epc->mutex);
cfdda9d7 277 state = epc->state;
2f5b48c3 278 mutex_unlock(&epc->mutex);
cfdda9d7
SW		 279 return state;
280}
281
282static void __state_set(struct c4iw_ep_common *epc, enum c4iw_ep_state new)
283{
284 epc->state = new;
285}
286
287static void state_set(struct c4iw_ep_common *epc, enum c4iw_ep_state new)
288{
2f5b48c3 289 mutex_lock(&epc->mutex);
a9a42886 290 pr_debug("%s - %s -> %s\n", __func__, states[epc->state], states[new]);
cfdda9d7 291 __state_set(epc, new);
2f5b48c3 292 mutex_unlock(&epc->mutex);
cfdda9d7
SW		 293 return;
294}
295
4a740838
H		 296static int alloc_ep_skb_list(struct sk_buff_head *ep_skb_list, int size)
297{
298 struct sk_buff *skb;
299 unsigned int i;
300 size_t len;
301
302 len = roundup(sizeof(union cpl_wr_size), 16);
303 for (i = 0; i < size; i++) {
304 skb = alloc_skb(len, GFP_KERNEL);
305 if (!skb)
306 goto fail;
307 skb_queue_tail(ep_skb_list, skb);
308 }
309 return 0;
310fail:
311 skb_queue_purge(ep_skb_list);
312 return -ENOMEM;
313}
314
cfdda9d7
SW		 315static void *alloc_ep(int size, gfp_t gfp)
316{
317 struct c4iw_ep_common *epc;
318
319 epc = kzalloc(size, gfp);
320 if (epc) {
321 kref_init(&epc->kref);
2f5b48c3 322 mutex_init(&epc->mutex);
aadc4df3 323 c4iw_init_wr_wait(&epc->wr_wait);
cfdda9d7 324 }
a9a42886 325 pr_debug("%s alloc ep %p\n", __func__, epc);
cfdda9d7
SW		 326 return epc;
327}
328
944661dd
H		 329static void remove_ep_tid(struct c4iw_ep *ep)
330{
331 unsigned long flags;
332
333 spin_lock_irqsave(&ep->com.dev->lock, flags);
334 _remove_handle(ep->com.dev, &ep->com.dev->hwtid_idr, ep->hwtid, 0);
37eb816c
SW		 335 if (idr_is_empty(&ep->com.dev->hwtid_idr))
336 wake_up(&ep->com.dev->wait);
944661dd
H		 337 spin_unlock_irqrestore(&ep->com.dev->lock, flags);
338}
339
340static void insert_ep_tid(struct c4iw_ep *ep)
341{
342 unsigned long flags;
343
344 spin_lock_irqsave(&ep->com.dev->lock, flags);
345 _insert_handle(ep->com.dev, &ep->com.dev->hwtid_idr, ep, ep->hwtid, 0);
346 spin_unlock_irqrestore(&ep->com.dev->lock, flags);
347}
348
349/*
350 * Atomically lookup the ep ptr given the tid and grab a reference on the ep.
351 */
352static struct c4iw_ep *get_ep_from_tid(struct c4iw_dev *dev, unsigned int tid)
353{
354 struct c4iw_ep *ep;
355 unsigned long flags;
356
357 spin_lock_irqsave(&dev->lock, flags);
358 ep = idr_find(&dev->hwtid_idr, tid);
359 if (ep)
360 c4iw_get_ep(&ep->com);
361 spin_unlock_irqrestore(&dev->lock, flags);
362 return ep;
363}
364
f86fac79
H		 365/*
366 * Atomically lookup the ep ptr given the stid and grab a reference on the ep.
367 */
368static struct c4iw_listen_ep *get_ep_from_stid(struct c4iw_dev *dev,
369 unsigned int stid)
370{
371 struct c4iw_listen_ep *ep;
372 unsigned long flags;
373
374 spin_lock_irqsave(&dev->lock, flags);
375 ep = idr_find(&dev->stid_idr, stid);
376 if (ep)
377 c4iw_get_ep(&ep->com);
378 spin_unlock_irqrestore(&dev->lock, flags);
379 return ep;
380}
381
cfdda9d7
SW		 382void _c4iw_free_ep(struct kref *kref)
383{
384 struct c4iw_ep *ep;
385
386 ep = container_of(kref, struct c4iw_ep, com.kref);
a9a42886 387 pr_debug("%s ep %p state %s\n", __func__, ep, states[ep->com.state]);
325abead
VP		 388 if (test_bit(QP_REFERENCED, &ep->com.flags))
389 deref_qp(ep);
cfdda9d7 390 if (test_bit(RELEASE_RESOURCES, &ep->com.flags)) {
84cc6ac6
H		 391 if (ep->com.remote_addr.ss_family == AF_INET6) {
392 struct sockaddr_in6 *sin6 =
393 (struct sockaddr_in6 *)
170003c8 394 &ep->com.local_addr;
84cc6ac6
H		 395
396 cxgb4_clip_release(
397 ep->com.dev->rdev.lldi.ports[0],
398 (const u32 *)&sin6->sin6_addr.s6_addr,
399 1);
400 }
cfdda9d7
SW		 401 cxgb4_remove_tid(ep->com.dev->rdev.lldi.tids, 0, ep->hwtid);
402 dst_release(ep->dst);
403 cxgb4_l2t_release(ep->l2t);
c878b706
H		 404 if (ep->mpa_skb)
405 kfree_skb(ep->mpa_skb);
cfdda9d7 406 }
4a740838
H		 407 if (!skb_queue_empty(&ep->com.ep_skb_list))
408 skb_queue_purge(&ep->com.ep_skb_list);
cfdda9d7
SW		 409 kfree(ep);
410}
411
412static void release_ep_resources(struct c4iw_ep *ep)
413{
414 set_bit(RELEASE_RESOURCES, &ep->com.flags);
944661dd
H		 415
416 /*
417 * If we have a hwtid, then remove it from the idr table
418 * so lookups will no longer find this endpoint. Otherwise
419 * we have a race where one thread finds the ep ptr just
420 * before the other thread is freeing the ep memory.
421 */
422 if (ep->hwtid != -1)
423 remove_ep_tid(ep);
cfdda9d7
SW		 424 c4iw_put_ep(&ep->com);
425}
426
cfdda9d7
SW		 427static int status2errno(int status)
428{
429 switch (status) {
430 case CPL_ERR_NONE:
431 return 0;
432 case CPL_ERR_CONN_RESET:
433 return -ECONNRESET;
434 case CPL_ERR_ARP_MISS:
435 return -EHOSTUNREACH;
436 case CPL_ERR_CONN_TIMEDOUT:
437 return -ETIMEDOUT;
438 case CPL_ERR_TCAM_FULL:
439 return -ENOMEM;
440 case CPL_ERR_CONN_EXIST:
441 return -EADDRINUSE;
442 default:
443 return -EIO;
444 }
445}
446
447/*
448 * Try and reuse skbs already allocated...
449 */
450static struct sk_buff *get_skb(struct sk_buff *skb, int len, gfp_t gfp)
451{
452 if (skb && !skb_is_nonlinear(skb) && !skb_cloned(skb)) {
453 skb_trim(skb, 0);
454 skb_get(skb);
455 skb_reset_transport_header(skb);
456 } else {
457 skb = alloc_skb(len, gfp);
458 }
b38a0ad8 459 t4_set_arp_err_handler(skb, NULL, NULL);
cfdda9d7
SW		 460 return skb;
461}
462
830662f6
VP		 463static struct net_device *get_real_dev(struct net_device *egress_dev)
464{
11b8e22d 465 return rdma_vlan_dev_real_dev(egress_dev) ? : egress_dev;
830662f6
VP		 466}
467
cfdda9d7
SW		 468static void arp_failure_discard(void *handle, struct sk_buff *skb)
469{
700456bd 470 pr_err("ARP failure\n");
cfdda9d7
SW		 471 kfree_skb(skb);
472}
473
64bec74a
H		 474static void mpa_start_arp_failure(void *handle, struct sk_buff *skb)
475{
476 pr_err("ARP failure during MPA Negotiation - Closing Connection\n");
477}
478
9dec900c 479enum {
8d1f1a6b 480 NUM_FAKE_CPLS = 2,
9dec900c 481 FAKE_CPL_PUT_EP_SAFE = NUM_CPL_CMDS + 0,
8d1f1a6b 482 FAKE_CPL_PASS_PUT_EP_SAFE = NUM_CPL_CMDS + 1,
9dec900c
H		 483};
484
485static int _put_ep_safe(struct c4iw_dev *dev, struct sk_buff *skb)
486{
487 struct c4iw_ep *ep;
488
489 ep = *((struct c4iw_ep **)(skb->cb + 2 * sizeof(void *)));
490 release_ep_resources(ep);
1dad0ebe 491 kfree_skb(skb);
9dec900c
H		 492 return 0;
493}
494
8d1f1a6b
H		 495static int _put_pass_ep_safe(struct c4iw_dev *dev, struct sk_buff *skb)
496{
497 struct c4iw_ep *ep;
498
499 ep = *((struct c4iw_ep **)(skb->cb + 2 * sizeof(void *)));
500 c4iw_put_ep(&ep->parent_ep->com);
501 release_ep_resources(ep);
1dad0ebe 502 kfree_skb(skb);
8d1f1a6b
H		 503 return 0;
504}
505
9dec900c
H		 506/*
507 * Fake up a special CPL opcode and call sched() so process_work() will call
508 * _put_ep_safe() in a safe context to free the ep resources. This is needed
509 * because ARP error handlers are called in an ATOMIC context, and
510 * _c4iw_free_ep() needs to block.
511 */
8d1f1a6b
H		 512static void queue_arp_failure_cpl(struct c4iw_ep *ep, struct sk_buff *skb,
513 int cpl)
9dec900c
H		 514{
515 struct cpl_act_establish *rpl = cplhdr(skb);
516
517 /* Set our special ARP_FAILURE opcode */
8d1f1a6b 518 rpl->ot.opcode = cpl;
9dec900c
H		 519
520 /*
521 * Save ep in the skb->cb area, after where sched() will save the dev
522 * ptr.
523 */
524 *((struct c4iw_ep **)(skb->cb + 2 * sizeof(void *))) = ep;
525 sched(ep->com.dev, skb);
526}
527
528/* Handle an ARP failure for an accept */
529static void pass_accept_rpl_arp_failure(void *handle, struct sk_buff *skb)
530{
531 struct c4iw_ep *ep = handle;
532
700456bd 533 pr_err("ARP failure during accept - tid %u - dropping connection\n",
9dec900c
H		 534 ep->hwtid);
535
536 __state_set(&ep->com, DEAD);
8d1f1a6b 537 queue_arp_failure_cpl(ep, skb, FAKE_CPL_PASS_PUT_EP_SAFE);
9dec900c
H		 538}
539
cfdda9d7
SW		 540/*
541 * Handle an ARP failure for an active open.
542 */
543static void act_open_req_arp_failure(void *handle, struct sk_buff *skb)
544{
5dab6d3a
H		 545 struct c4iw_ep *ep = handle;
546
700456bd 547 pr_err("ARP failure during connect\n");
5dab6d3a 548 connect_reply_upcall(ep, -EHOSTUNREACH);
9dec900c 549 __state_set(&ep->com, DEAD);
84cc6ac6
H		 550 if (ep->com.remote_addr.ss_family == AF_INET6) {
551 struct sockaddr_in6 *sin6 =
170003c8 552 (struct sockaddr_in6 *)&ep->com.local_addr;
84cc6ac6
H		 553 cxgb4_clip_release(ep->com.dev->rdev.lldi.ports[0],
554 (const u32 *)&sin6->sin6_addr.s6_addr, 1);
555 }
5dab6d3a
H		 556 remove_handle(ep->com.dev, &ep->com.dev->atid_idr, ep->atid);
557 cxgb4_free_atid(ep->com.dev->rdev.lldi.tids, ep->atid);
8d1f1a6b 558 queue_arp_failure_cpl(ep, skb, FAKE_CPL_PUT_EP_SAFE);
cfdda9d7
SW		 559}
560
561/*
562 * Handle an ARP failure for a CPL_ABORT_REQ. Change it into a no RST variant
563 * and send it along.
564 */
565static void abort_arp_failure(void *handle, struct sk_buff *skb)
566{
761e19a5
H		 567 int ret;
568 struct c4iw_ep *ep = handle;
569 struct c4iw_rdev *rdev = &ep->com.dev->rdev;
cfdda9d7
SW		 570 struct cpl_abort_req *req = cplhdr(skb);
571
a9a42886 572 pr_debug("%s rdev %p\n", __func__, rdev);
cfdda9d7 573 req->cmd = CPL_ABORT_NO_RST;
1dad0ebe 574 skb_get(skb);
761e19a5
H		 575 ret = c4iw_ofld_send(rdev, skb);
576 if (ret) {
577 __state_set(&ep->com, DEAD);
578 queue_arp_failure_cpl(ep, skb, FAKE_CPL_PUT_EP_SAFE);
1dad0ebe
RR		 579 } else
580 kfree_skb(skb);
cfdda9d7
SW		 581}
582
4a740838 583static int send_flowc(struct c4iw_ep *ep)
cfdda9d7 584{
cfdda9d7 585 struct fw_flowc_wr *flowc;
4a740838 586 struct sk_buff *skb = skb_dequeue(&ep->com.ep_skb_list);
cfdda9d7 587 int i;
ac8e4c69
H		 588 u16 vlan = ep->l2t->vlan;
589 int nparams;
590
4a740838
H		 591 if (WARN_ON(!skb))
592 return -ENOMEM;
593
ac8e4c69
H		 594 if (vlan == CPL_L2T_VLAN_NONE)
595 nparams = 8;
596 else
597 nparams = 9;
cfdda9d7 598
4a740838 599 flowc = (struct fw_flowc_wr *)__skb_put(skb, FLOWC_LEN);
cfdda9d7 600
e2ac9628 601 flowc->op_to_nparams = cpu_to_be32(FW_WR_OP_V(FW_FLOWC_WR) |
ac8e4c69 602 FW_FLOWC_WR_NPARAMS_V(nparams));
4a740838 603 flowc->flowid_len16 = cpu_to_be32(FW_WR_LEN16_V(DIV_ROUND_UP(FLOWC_LEN,
e2ac9628 604 16)) | FW_WR_FLOWID_V(ep->hwtid));
cfdda9d7
SW		 605
606 flowc->mnemval[0].mnemonic = FW_FLOWC_MNEM_PFNVFN;
5167865a 607 flowc->mnemval[0].val = cpu_to_be32(FW_PFVF_CMD_PFN_V
35b1de55 608 (ep->com.dev->rdev.lldi.pf));
cfdda9d7
SW		 609 flowc->mnemval[1].mnemonic = FW_FLOWC_MNEM_CH;
610 flowc->mnemval[1].val = cpu_to_be32(ep->tx_chan);
611 flowc->mnemval[2].mnemonic = FW_FLOWC_MNEM_PORT;
612 flowc->mnemval[2].val = cpu_to_be32(ep->tx_chan);
613 flowc->mnemval[3].mnemonic = FW_FLOWC_MNEM_IQID;
614 flowc->mnemval[3].val = cpu_to_be32(ep->rss_qid);
615 flowc->mnemval[4].mnemonic = FW_FLOWC_MNEM_SNDNXT;
616 flowc->mnemval[4].val = cpu_to_be32(ep->snd_seq);
617 flowc->mnemval[5].mnemonic = FW_FLOWC_MNEM_RCVNXT;
618 flowc->mnemval[5].val = cpu_to_be32(ep->rcv_seq);
619 flowc->mnemval[6].mnemonic = FW_FLOWC_MNEM_SNDBUF;
b408ff28 620 flowc->mnemval[6].val = cpu_to_be32(ep->snd_win);
cfdda9d7
SW		 621 flowc->mnemval[7].mnemonic = FW_FLOWC_MNEM_MSS;
622 flowc->mnemval[7].val = cpu_to_be32(ep->emss);
ac8e4c69
H		 623 if (nparams == 9) {
624 u16 pri;
625
626 pri = (vlan & VLAN_PRIO_MASK) >> VLAN_PRIO_SHIFT;
627 flowc->mnemval[8].mnemonic = FW_FLOWC_MNEM_SCHEDCLASS;
628 flowc->mnemval[8].val = cpu_to_be32(pri);
629 } else {
630 /* Pad WR to 16 byte boundary */
631 flowc->mnemval[8].mnemonic = 0;
632 flowc->mnemval[8].val = 0;
633 }
cfdda9d7
SW		 634 for (i = 0; i < 9; i++) {
635 flowc->mnemval[i].r4[0] = 0;
636 flowc->mnemval[i].r4[1] = 0;
637 flowc->mnemval[i].r4[2] = 0;
638 }
639
640 set_wr_txq(skb, CPL_PRIORITY_DATA, ep->txq_idx);
fef4422d 641 return c4iw_ofld_send(&ep->com.dev->rdev, skb);
cfdda9d7
SW		 642}
643
4a740838 644static int send_halfclose(struct c4iw_ep *ep)
cfdda9d7 645{
4a740838 646 struct sk_buff *skb = skb_dequeue(&ep->com.ep_skb_list);
29fb6f42 647 u32 wrlen = roundup(sizeof(struct cpl_close_con_req), 16);
cfdda9d7 648
a9a42886 649 pr_debug("%s ep %p tid %u\n", __func__, ep, ep->hwtid);
4a740838 650 if (WARN_ON(!skb))
cfdda9d7 651 return -ENOMEM;
4a740838 652
29fb6f42
VP		 653 cxgb_mk_close_con_req(skb, wrlen, ep->hwtid, ep->txq_idx,
654 NULL, arp_failure_discard);
655
cfdda9d7
SW		 656 return c4iw_l2t_send(&ep->com.dev->rdev, skb, ep->l2t);
657}
658
4a740838 659static int send_abort(struct c4iw_ep *ep)
cfdda9d7 660{
a7e1a97f 661 u32 wrlen = roundup(sizeof(struct cpl_abort_req), 16);
4a740838 662 struct sk_buff *req_skb = skb_dequeue(&ep->com.ep_skb_list);
cfdda9d7 663
a9a42886 664 pr_debug("%s ep %p tid %u\n", __func__, ep, ep->hwtid);
4a740838 665 if (WARN_ON(!req_skb))
cfdda9d7 666 return -ENOMEM;
4a740838 667
a7e1a97f
VP		 668 cxgb_mk_abort_req(req_skb, wrlen, ep->hwtid, ep->txq_idx,
669 ep, abort_arp_failure);
670
4a740838 671 return c4iw_l2t_send(&ep->com.dev->rdev, req_skb, ep->l2t);
cfdda9d7
SW		 672}
673
674static int send_connect(struct c4iw_ep *ep)
675{
963cab50
H		 676 struct cpl_act_open_req *req = NULL;
677 struct cpl_t5_act_open_req *t5req = NULL;
678 struct cpl_t6_act_open_req *t6req = NULL;
679 struct cpl_act_open_req6 *req6 = NULL;
680 struct cpl_t5_act_open_req6 *t5req6 = NULL;
681 struct cpl_t6_act_open_req6 *t6req6 = NULL;
cfdda9d7
SW		 682 struct sk_buff *skb;
683 u64 opt0;
684 u32 opt2;
685 unsigned int mtu_idx;
cc516700 686 u32 wscale;
963cab50 687 int win, sizev4, sizev6, wrlen;
9eccfe10 688 struct sockaddr_in *la = (struct sockaddr_in *)
170003c8 689 &ep->com.local_addr;
9eccfe10 690 struct sockaddr_in *ra = (struct sockaddr_in *)
170003c8 691 &ep->com.remote_addr;
9eccfe10 692 struct sockaddr_in6 *la6 = (struct sockaddr_in6 *)
170003c8 693 &ep->com.local_addr;
9eccfe10 694 struct sockaddr_in6 *ra6 = (struct sockaddr_in6 *)
170003c8 695 &ep->com.remote_addr;
84cc6ac6 696 int ret;
963cab50
H		 697 enum chip_type adapter_type = ep->com.dev->rdev.lldi.adapter_type;
698 u32 isn = (prandom_u32() & ~7UL) - 1;
192539f4
GG		 699 struct net_device *netdev;
700 u64 params;
701
702 netdev = ep->com.dev->rdev.lldi.ports[0];
963cab50
H		 703
704 switch (CHELSIO_CHIP_VERSION(adapter_type)) {
705 case CHELSIO_T4:
706 sizev4 = sizeof(struct cpl_act_open_req);
707 sizev6 = sizeof(struct cpl_act_open_req6);
708 break;
709 case CHELSIO_T5:
710 sizev4 = sizeof(struct cpl_t5_act_open_req);
711 sizev6 = sizeof(struct cpl_t5_act_open_req6);
712 break;
713 case CHELSIO_T6:
714 sizev4 = sizeof(struct cpl_t6_act_open_req);
715 sizev6 = sizeof(struct cpl_t6_act_open_req6);
716 break;
717 default:
718 pr_err("T%d Chip is not supported\n",
719 CHELSIO_CHIP_VERSION(adapter_type));
720 return -EINVAL;
721 }
830662f6
VP		 722
723 wrlen = (ep->com.remote_addr.ss_family == AF_INET) ?
724 roundup(sizev4, 16) :
725 roundup(sizev6, 16);
cfdda9d7 726
a9a42886 727 pr_debug("%s ep %p atid %u\n", __func__, ep, ep->atid);
cfdda9d7
SW		 728
729 skb = get_skb(NULL, wrlen, GFP_KERNEL);
730 if (!skb) {
700456bd 731 pr_err("%s - failed to alloc skb\n", __func__);
cfdda9d7
SW		 732 return -ENOMEM;
733 }
d4f1a5c6 734 set_wr_txq(skb, CPL_PRIORITY_SETUP, ep->ctrlq_idx);
cfdda9d7 735
44c6d069
VP		 736 cxgb_best_mtu(ep->com.dev->rdev.lldi.mtus, ep->mtu, &mtu_idx,
737 enable_tcp_timestamps,
738 (ep->com.remote_addr.ss_family == AF_INET) ? 0 : 1);
cc516700 739 wscale = cxgb_compute_wscale(rcv_win);
b408ff28
HS		 740
741 /*
742 * Specify the largest window that will fit in opt0. The
743 * remainder will be specified in the rx_data_ack.
744 */
745 win = ep->rcv_win >> 10;
d7990b0c
AB		 746 if (win > RCV_BUFSIZ_M)
747 win = RCV_BUFSIZ_M;
b408ff28 748
6c53e938 749 opt0 = (nocong ? NO_CONG_F : 0) |
d7990b0c 750 KEEP_ALIVE_F |
6c53e938 751 DELACK_F |
d7990b0c
AB		 752 WND_SCALE_V(wscale) |
753 MSS_IDX_V(mtu_idx) |
754 L2T_IDX_V(ep->l2t->idx) |
755 TX_CHAN_V(ep->tx_chan) |
756 SMAC_SEL_V(ep->smac_idx) |
ac8e4c69 757 DSCP_V(ep->tos >> 2) |
d7990b0c
AB		 758 ULP_MODE_V(ULP_MODE_TCPDDP) |
759 RCV_BUFSIZ_V(win);
760 opt2 = RX_CHANNEL_V(0) |
6c53e938 761 CCTRL_ECN_V(enable_ecn) |
d7990b0c 762 RSS_QUEUE_VALID_F | RSS_QUEUE_V(ep->rss_qid);
cfdda9d7 763 if (enable_tcp_timestamps)
6c53e938 764 opt2 |= TSTAMPS_EN_F;
cfdda9d7 765 if (enable_tcp_sack)
6c53e938 766 opt2 |= SACK_EN_F;
cfdda9d7 767 if (wscale && enable_tcp_window_scaling)
d7990b0c 768 opt2 |= WND_SCALE_EN_F;
963cab50
H		 769 if (CHELSIO_CHIP_VERSION(adapter_type) > CHELSIO_T4) {
770 if (peer2peer)
771 isn += 4;
772
d7990b0c 773 opt2 |= T5_OPT_2_VALID_F;
cf7fe64a 774 opt2 |= CONG_CNTRL_V(CONG_ALG_TAHOE);
0b741047 775 opt2 |= T5_ISS_F;
92e5011a 776 }
84cc6ac6 777
192539f4
GG		 778 params = cxgb4_select_ntuple(netdev, ep->l2t);
779
84cc6ac6
H		 780 if (ep->com.remote_addr.ss_family == AF_INET6)
781 cxgb4_clip_get(ep->com.dev->rdev.lldi.ports[0],
782 (const u32 *)&la6->sin6_addr.s6_addr, 1);
783
5dab6d3a 784 t4_set_arp_err_handler(skb, ep, act_open_req_arp_failure);
cfdda9d7 785
963cab50
H		 786 if (ep->com.remote_addr.ss_family == AF_INET) {
787 switch (CHELSIO_CHIP_VERSION(adapter_type)) {
788 case CHELSIO_T4:
789 req = (struct cpl_act_open_req *)skb_put(skb, wrlen);
830662f6 790 INIT_TP_WR(req, 0);
963cab50
H		 791 break;
792 case CHELSIO_T5:
793 t5req = (struct cpl_t5_act_open_req *)skb_put(skb,
794 wrlen);
795 INIT_TP_WR(t5req, 0);
796 req = (struct cpl_act_open_req *)t5req;
797 break;
798 case CHELSIO_T6:
799 t6req = (struct cpl_t6_act_open_req *)skb_put(skb,
800 wrlen);
801 INIT_TP_WR(t6req, 0);
802 req = (struct cpl_act_open_req *)t6req;
803 t5req = (struct cpl_t5_act_open_req *)t6req;
804 break;
805 default:
806 pr_err("T%d Chip is not supported\n",
807 CHELSIO_CHIP_VERSION(adapter_type));
808 ret = -EINVAL;
809 goto clip_release;
810 }
811
812 OPCODE_TID(req) = cpu_to_be32(MK_OPCODE_TID(CPL_ACT_OPEN_REQ,
813 ((ep->rss_qid<<14) | ep->atid)));
814 req->local_port = la->sin_port;
815 req->peer_port = ra->sin_port;
816 req->local_ip = la->sin_addr.s_addr;
817 req->peer_ip = ra->sin_addr.s_addr;
818 req->opt0 = cpu_to_be64(opt0);
819
820 if (is_t4(ep->com.dev->rdev.lldi.adapter_type)) {
192539f4 821 req->params = cpu_to_be32(params);
830662f6
VP		 822 req->opt2 = cpu_to_be32(opt2);
823 } else {
192539f4
GG		 824 if (is_t5(ep->com.dev->rdev.lldi.adapter_type)) {
825 t5req->params =
826 cpu_to_be64(FILTER_TUPLE_V(params));
827 t5req->rsvd = cpu_to_be32(isn);
a9a42886 828 pr_debug("%s snd_isn %u\n", __func__, t5req->rsvd);
192539f4
GG		 829 t5req->opt2 = cpu_to_be32(opt2);
830 } else {
831 t6req->params =
832 cpu_to_be64(FILTER_TUPLE_V(params));
833 t6req->rsvd = cpu_to_be32(isn);
339e7575 834 pr_debug("%s snd_isn %u\n", __func__, t6req->rsvd);
192539f4
GG		 835 t6req->opt2 = cpu_to_be32(opt2);
836 }
963cab50
H		 837 }
838 } else {
839 switch (CHELSIO_CHIP_VERSION(adapter_type)) {
840 case CHELSIO_T4:
830662f6 841 req6 = (struct cpl_act_open_req6 *)skb_put(skb, wrlen);
830662f6 842 INIT_TP_WR(req6, 0);
963cab50
H		 843 break;
844 case CHELSIO_T5:
845 t5req6 = (struct cpl_t5_act_open_req6 *)skb_put(skb,
846 wrlen);
847 INIT_TP_WR(t5req6, 0);
848 req6 = (struct cpl_act_open_req6 *)t5req6;
849 break;
850 case CHELSIO_T6:
851 t6req6 = (struct cpl_t6_act_open_req6 *)skb_put(skb,
852 wrlen);
853 INIT_TP_WR(t6req6, 0);
854 req6 = (struct cpl_act_open_req6 *)t6req6;
855 t5req6 = (struct cpl_t5_act_open_req6 *)t6req6;
856 break;
857 default:
858 pr_err("T%d Chip is not supported\n",
859 CHELSIO_CHIP_VERSION(adapter_type));
860 ret = -EINVAL;
861 goto clip_release;
862 }
863
864 OPCODE_TID(req6) = cpu_to_be32(MK_OPCODE_TID(CPL_ACT_OPEN_REQ6,
865 ((ep->rss_qid<<14)|ep->atid)));
866 req6->local_port = la6->sin6_port;
867 req6->peer_port = ra6->sin6_port;
868 req6->local_ip_hi = *((__be64 *)(la6->sin6_addr.s6_addr));
869 req6->local_ip_lo = *((__be64 *)(la6->sin6_addr.s6_addr + 8));
870 req6->peer_ip_hi = *((__be64 *)(ra6->sin6_addr.s6_addr));
871 req6->peer_ip_lo = *((__be64 *)(ra6->sin6_addr.s6_addr + 8));
872 req6->opt0 = cpu_to_be64(opt0);
873
874 if (is_t4(ep->com.dev->rdev.lldi.adapter_type)) {
192539f4
GG		 875 req6->params = cpu_to_be32(cxgb4_select_ntuple(netdev,
876 ep->l2t));
830662f6 877 req6->opt2 = cpu_to_be32(opt2);
830662f6 878 } else {
192539f4
GG		 879 if (is_t5(ep->com.dev->rdev.lldi.adapter_type)) {
880 t5req6->params =
881 cpu_to_be64(FILTER_TUPLE_V(params));
882 t5req6->rsvd = cpu_to_be32(isn);
a9a42886 883 pr_debug("%s snd_isn %u\n", __func__, t5req6->rsvd);
192539f4
GG		 884 t5req6->opt2 = cpu_to_be32(opt2);
885 } else {
886 t6req6->params =
887 cpu_to_be64(FILTER_TUPLE_V(params));
888 t6req6->rsvd = cpu_to_be32(isn);
339e7575 889 pr_debug("%s snd_isn %u\n", __func__, t6req6->rsvd);
192539f4
GG		 890 t6req6->opt2 = cpu_to_be32(opt2);
891 }
892
830662f6 893 }
f079af7a
VP		 894 }
895
793dad94 896 set_bit(ACT_OPEN_REQ, &ep->com.history);
84cc6ac6 897 ret = c4iw_l2t_send(&ep->com.dev->rdev, skb, ep->l2t);
963cab50 898clip_release:
84cc6ac6
H		 899 if (ret && ep->com.remote_addr.ss_family == AF_INET6)
900 cxgb4_clip_release(ep->com.dev->rdev.lldi.ports[0],
901 (const u32 *)&la6->sin6_addr.s6_addr, 1);
902 return ret;
cfdda9d7
SW		 903}
904
caa6c9f2
H		 905static int send_mpa_req(struct c4iw_ep *ep, struct sk_buff *skb,
906 u8 mpa_rev_to_use)
cfdda9d7 907{
caa6c9f2 908 int mpalen, wrlen, ret;
cfdda9d7
SW		 909 struct fw_ofld_tx_data_wr *req;
910 struct mpa_message *mpa;
d2fe99e8 911 struct mpa_v2_conn_params mpa_v2_params;
cfdda9d7 912
a9a42886
JP		 913 pr_debug("%s ep %p tid %u pd_len %d\n",
914 __func__, ep, ep->hwtid, ep->plen);
cfdda9d7
SW		 915
916 BUG_ON(skb_cloned(skb));
917
918 mpalen = sizeof(*mpa) + ep->plen;
d2fe99e8
KS		 919 if (mpa_rev_to_use == 2)
920 mpalen += sizeof(struct mpa_v2_conn_params);
cfdda9d7
SW		 921 wrlen = roundup(mpalen + sizeof *req, 16);
922 skb = get_skb(skb, wrlen, GFP_KERNEL);
923 if (!skb) {
924 connect_reply_upcall(ep, -ENOMEM);
caa6c9f2 925 return -ENOMEM;
cfdda9d7
SW		 926 }
927 set_wr_txq(skb, CPL_PRIORITY_DATA, ep->txq_idx);
928
929 req = (struct fw_ofld_tx_data_wr *)skb_put(skb, wrlen);
930 memset(req, 0, wrlen);
931 req->op_to_immdlen = cpu_to_be32(
e2ac9628
HS		 932 FW_WR_OP_V(FW_OFLD_TX_DATA_WR) |
933 FW_WR_COMPL_F |
934 FW_WR_IMMDLEN_V(mpalen));
cfdda9d7 935 req->flowid_len16 = cpu_to_be32(
e2ac9628
HS		 936 FW_WR_FLOWID_V(ep->hwtid) |
937 FW_WR_LEN16_V(wrlen >> 4));
cfdda9d7
SW		 938 req->plen = cpu_to_be32(mpalen);
939 req->tunnel_to_proxy = cpu_to_be32(
e2ac9628
HS		 940 FW_OFLD_TX_DATA_WR_FLUSH_F |
941 FW_OFLD_TX_DATA_WR_SHOVE_F);
cfdda9d7
SW		 942
943 mpa = (struct mpa_message *)(req + 1);
944 memcpy(mpa->key, MPA_KEY_REQ, sizeof(mpa->key));
3d4e7994
H		 945
946 mpa->flags = 0;
947 if (crc_enabled)
948 mpa->flags |= MPA_CRC;
949 if (markers_enabled) {
950 mpa->flags |= MPA_MARKERS;
951 ep->mpa_attr.recv_marker_enabled = 1;
952 } else {
953 ep->mpa_attr.recv_marker_enabled = 0;
954 }
955 if (mpa_rev_to_use == 2)
956 mpa->flags |= MPA_ENHANCED_RDMA_CONN;
957
cfdda9d7 958 mpa->private_data_size = htons(ep->plen);
d2fe99e8 959 mpa->revision = mpa_rev_to_use;
01b225e1 960 if (mpa_rev_to_use == 1) {
d2fe99e8 961 ep->tried_with_mpa_v1 = 1;
01b225e1
KS		 962 ep->retry_with_mpa_v1 = 0;
963 }
d2fe99e8
KS		 964
965 if (mpa_rev_to_use == 2) {
f747c34a
RD		 966 mpa->private_data_size = htons(ntohs(mpa->private_data_size) +
967 sizeof (struct mpa_v2_conn_params));
a9a42886
JP		 968 pr_debug("%s initiator ird %u ord %u\n", __func__, ep->ird,
969 ep->ord);
d2fe99e8
KS		 970 mpa_v2_params.ird = htons((u16)ep->ird);
971 mpa_v2_params.ord = htons((u16)ep->ord);
972
973 if (peer2peer) {
974 mpa_v2_params.ird |= htons(MPA_V2_PEER2PEER_MODEL);
975 if (p2p_type == FW_RI_INIT_P2PTYPE_RDMA_WRITE)
976 mpa_v2_params.ord |=
977 htons(MPA_V2_RDMA_WRITE_RTR);
978 else if (p2p_type == FW_RI_INIT_P2PTYPE_READ_REQ)
979 mpa_v2_params.ord |=
980 htons(MPA_V2_RDMA_READ_RTR);
981 }
982 memcpy(mpa->private_data, &mpa_v2_params,
983 sizeof(struct mpa_v2_conn_params));
cfdda9d7 984
d2fe99e8
KS		 985 if (ep->plen)
986 memcpy(mpa->private_data +
987 sizeof(struct mpa_v2_conn_params),
988 ep->mpa_pkt + sizeof(*mpa), ep->plen);
989 } else
990 if (ep->plen)
991 memcpy(mpa->private_data,
992 ep->mpa_pkt + sizeof(*mpa), ep->plen);
cfdda9d7
SW		 993
994 /*
995 * Reference the mpa skb. This ensures the data area
996 * will remain in memory until the hw acks the tx.
997 * Function fw4_ack() will deref it.
998 */
999 skb_get(skb);
1000 t4_set_arp_err_handler(skb, NULL, arp_failure_discard);
1001 BUG_ON(ep->mpa_skb);
1002 ep->mpa_skb = skb;
caa6c9f2
H		 1003 ret = c4iw_l2t_send(&ep->com.dev->rdev, skb, ep->l2t);
1004 if (ret)
1005 return ret;
cfdda9d7 1006 start_ep_timer(ep);
a7db89eb 1007 __state_set(&ep->com, MPA_REQ_SENT);
cfdda9d7 1008 ep->mpa_attr.initiator = 1;
9c88aa00 1009 ep->snd_seq += mpalen;
caa6c9f2 1010 return ret;
cfdda9d7
SW		 1011}
1012
1013static int send_mpa_reject(struct c4iw_ep *ep, const void *pdata, u8 plen)
1014{
1015 int mpalen, wrlen;
1016 struct fw_ofld_tx_data_wr *req;
1017 struct mpa_message *mpa;
1018 struct sk_buff *skb;
d2fe99e8 1019 struct mpa_v2_conn_params mpa_v2_params;
cfdda9d7 1020
a9a42886
JP		 1021 pr_debug("%s ep %p tid %u pd_len %d\n",
1022 __func__, ep, ep->hwtid, ep->plen);
cfdda9d7
SW		 1023
1024 mpalen = sizeof(*mpa) + plen;
d2fe99e8
KS		 1025 if (ep->mpa_attr.version == 2 && ep->mpa_attr.enhanced_rdma_conn)
1026 mpalen += sizeof(struct mpa_v2_conn_params);
cfdda9d7
SW		 1027 wrlen = roundup(mpalen + sizeof *req, 16);
1028
1029 skb = get_skb(NULL, wrlen, GFP_KERNEL);
1030 if (!skb) {
700456bd 1031 pr_err("%s - cannot alloc skb!\n", __func__);
cfdda9d7
SW		 1032 return -ENOMEM;
1033 }
1034 set_wr_txq(skb, CPL_PRIORITY_DATA, ep->txq_idx);
1035
1036 req = (struct fw_ofld_tx_data_wr *)skb_put(skb, wrlen);
1037 memset(req, 0, wrlen);
1038 req->op_to_immdlen = cpu_to_be32(
e2ac9628
HS		 1039 FW_WR_OP_V(FW_OFLD_TX_DATA_WR) |
1040 FW_WR_COMPL_F |
1041 FW_WR_IMMDLEN_V(mpalen));
cfdda9d7 1042 req->flowid_len16 = cpu_to_be32(
e2ac9628
HS		 1043 FW_WR_FLOWID_V(ep->hwtid) |
1044 FW_WR_LEN16_V(wrlen >> 4));
cfdda9d7
SW		 1045 req->plen = cpu_to_be32(mpalen);
1046 req->tunnel_to_proxy = cpu_to_be32(
e2ac9628
HS		 1047 FW_OFLD_TX_DATA_WR_FLUSH_F |
1048 FW_OFLD_TX_DATA_WR_SHOVE_F);
cfdda9d7
SW		 1049
1050 mpa = (struct mpa_message *)(req + 1);
1051 memset(mpa, 0, sizeof(*mpa));
1052 memcpy(mpa->key, MPA_KEY_REP, sizeof(mpa->key));
1053 mpa->flags = MPA_REJECT;
fe7e0a4d 1054 mpa->revision = ep->mpa_attr.version;
cfdda9d7 1055 mpa->private_data_size = htons(plen);
d2fe99e8
KS		 1056
1057 if (ep->mpa_attr.version == 2 && ep->mpa_attr.enhanced_rdma_conn) {
1058 mpa->flags |= MPA_ENHANCED_RDMA_CONN;
f747c34a
RD		 1059 mpa->private_data_size = htons(ntohs(mpa->private_data_size) +
1060 sizeof (struct mpa_v2_conn_params));
d2fe99e8
KS		 1061 mpa_v2_params.ird = htons(((u16)ep->ird) |
1062 (peer2peer ? MPA_V2_PEER2PEER_MODEL :
1063 0));
1064 mpa_v2_params.ord = htons(((u16)ep->ord) | (peer2peer ?
1065 (p2p_type ==
1066 FW_RI_INIT_P2PTYPE_RDMA_WRITE ?
1067 MPA_V2_RDMA_WRITE_RTR : p2p_type ==
1068 FW_RI_INIT_P2PTYPE_READ_REQ ?
1069 MPA_V2_RDMA_READ_RTR : 0) : 0));
1070 memcpy(mpa->private_data, &mpa_v2_params,
1071 sizeof(struct mpa_v2_conn_params));
1072
1073 if (ep->plen)
1074 memcpy(mpa->private_data +
1075 sizeof(struct mpa_v2_conn_params), pdata, plen);
1076 } else
1077 if (plen)
1078 memcpy(mpa->private_data, pdata, plen);
cfdda9d7
SW		 1079
1080 /*
1081 * Reference the mpa skb again. This ensures the data area
1082 * will remain in memory until the hw acks the tx.
1083 * Function fw4_ack() will deref it.
1084 */
1085 skb_get(skb);
1086 set_wr_txq(skb, CPL_PRIORITY_DATA, ep->txq_idx);
64bec74a 1087 t4_set_arp_err_handler(skb, NULL, mpa_start_arp_failure);
cfdda9d7
SW		 1088 BUG_ON(ep->mpa_skb);
1089 ep->mpa_skb = skb;
9c88aa00 1090 ep->snd_seq += mpalen;
cfdda9d7
SW		 1091 return c4iw_l2t_send(&ep->com.dev->rdev, skb, ep->l2t);
1092}
1093
1094static int send_mpa_reply(struct c4iw_ep *ep, const void *pdata, u8 plen)
1095{
1096 int mpalen, wrlen;
1097 struct fw_ofld_tx_data_wr *req;
1098 struct mpa_message *mpa;
1099 struct sk_buff *skb;
d2fe99e8 1100 struct mpa_v2_conn_params mpa_v2_params;
cfdda9d7 1101
a9a42886
JP		 1102 pr_debug("%s ep %p tid %u pd_len %d\n",
1103 __func__, ep, ep->hwtid, ep->plen);
cfdda9d7
SW		 1104
1105 mpalen = sizeof(*mpa) + plen;
d2fe99e8
KS		 1106 if (ep->mpa_attr.version == 2 && ep->mpa_attr.enhanced_rdma_conn)
1107 mpalen += sizeof(struct mpa_v2_conn_params);
cfdda9d7
SW		 1108 wrlen = roundup(mpalen + sizeof *req, 16);
1109
1110 skb = get_skb(NULL, wrlen, GFP_KERNEL);
1111 if (!skb) {
700456bd 1112 pr_err("%s - cannot alloc skb!\n", __func__);
cfdda9d7
SW		 1113 return -ENOMEM;
1114 }
1115 set_wr_txq(skb, CPL_PRIORITY_DATA, ep->txq_idx);
1116
1117 req = (struct fw_ofld_tx_data_wr *) skb_put(skb, wrlen);
1118 memset(req, 0, wrlen);
1119 req->op_to_immdlen = cpu_to_be32(
e2ac9628
HS		 1120 FW_WR_OP_V(FW_OFLD_TX_DATA_WR) |
1121 FW_WR_COMPL_F |
1122 FW_WR_IMMDLEN_V(mpalen));
cfdda9d7 1123 req->flowid_len16 = cpu_to_be32(
e2ac9628
HS		 1124 FW_WR_FLOWID_V(ep->hwtid) |
1125 FW_WR_LEN16_V(wrlen >> 4));
cfdda9d7
SW		 1126 req->plen = cpu_to_be32(mpalen);
1127 req->tunnel_to_proxy = cpu_to_be32(
e2ac9628
HS		 1128 FW_OFLD_TX_DATA_WR_FLUSH_F |
1129 FW_OFLD_TX_DATA_WR_SHOVE_F);
cfdda9d7
SW		 1130
1131 mpa = (struct mpa_message *)(req + 1);
1132 memset(mpa, 0, sizeof(*mpa));
1133 memcpy(mpa->key, MPA_KEY_REP, sizeof(mpa->key));
3d4e7994
H		 1134 mpa->flags = 0;
1135 if (ep->mpa_attr.crc_enabled)
1136 mpa->flags |= MPA_CRC;
1137 if (ep->mpa_attr.recv_marker_enabled)
1138 mpa->flags |= MPA_MARKERS;
d2fe99e8 1139 mpa->revision = ep->mpa_attr.version;
cfdda9d7 1140 mpa->private_data_size = htons(plen);
d2fe99e8
KS		 1141
1142 if (ep->mpa_attr.version == 2 && ep->mpa_attr.enhanced_rdma_conn) {
1143 mpa->flags |= MPA_ENHANCED_RDMA_CONN;
f747c34a
RD		 1144 mpa->private_data_size = htons(ntohs(mpa->private_data_size) +
1145 sizeof (struct mpa_v2_conn_params));
d2fe99e8
KS		 1146 mpa_v2_params.ird = htons((u16)ep->ird);
1147 mpa_v2_params.ord = htons((u16)ep->ord);
1148 if (peer2peer && (ep->mpa_attr.p2p_type !=
1149 FW_RI_INIT_P2PTYPE_DISABLED)) {
1150 mpa_v2_params.ird |= htons(MPA_V2_PEER2PEER_MODEL);
1151
1152 if (p2p_type == FW_RI_INIT_P2PTYPE_RDMA_WRITE)
1153 mpa_v2_params.ord |=
1154 htons(MPA_V2_RDMA_WRITE_RTR);
1155 else if (p2p_type == FW_RI_INIT_P2PTYPE_READ_REQ)
1156 mpa_v2_params.ord |=
1157 htons(MPA_V2_RDMA_READ_RTR);
1158 }
1159
1160 memcpy(mpa->private_data, &mpa_v2_params,
1161 sizeof(struct mpa_v2_conn_params));
1162
1163 if (ep->plen)
1164 memcpy(mpa->private_data +
1165 sizeof(struct mpa_v2_conn_params), pdata, plen);
1166 } else
1167 if (plen)
1168 memcpy(mpa->private_data, pdata, plen);
cfdda9d7
SW		 1169
1170 /*
1171 * Reference the mpa skb. This ensures the data area
1172 * will remain in memory until the hw acks the tx.
1173 * Function fw4_ack() will deref it.
1174 */
1175 skb_get(skb);
64bec74a 1176 t4_set_arp_err_handler(skb, NULL, mpa_start_arp_failure);
cfdda9d7 1177 ep->mpa_skb = skb;
a7db89eb 1178 __state_set(&ep->com, MPA_REP_SENT);
9c88aa00 1179 ep->snd_seq += mpalen;
cfdda9d7
SW		 1180 return c4iw_l2t_send(&ep->com.dev->rdev, skb, ep->l2t);
1181}
1182
1183static int act_establish(struct c4iw_dev *dev, struct sk_buff *skb)
1184{
1185 struct c4iw_ep *ep;
1186 struct cpl_act_establish *req = cplhdr(skb);
1187 unsigned int tid = GET_TID(req);
6c53e938 1188 unsigned int atid = TID_TID_G(ntohl(req->tos_atid));
cfdda9d7 1189 struct tid_info *t = dev->rdev.lldi.tids;
fef4422d 1190 int ret;
cfdda9d7
SW		 1191
1192 ep = lookup_atid(t, atid);
1193
a9a42886
JP		 1194 pr_debug("%s ep %p tid %u snd_isn %u rcv_isn %u\n", __func__, ep, tid,
1195 be32_to_cpu(req->snd_isn), be32_to_cpu(req->rcv_isn));
cfdda9d7 1196
a7db89eb 1197 mutex_lock(&ep->com.mutex);
cfdda9d7
SW		 1198 dst_confirm(ep->dst);
1199
1200 /* setup the hwtid for this connection */
1201 ep->hwtid = tid;
1202 cxgb4_insert_tid(t, ep, tid);
944661dd 1203 insert_ep_tid(ep);
cfdda9d7
SW		 1204
1205 ep->snd_seq = be32_to_cpu(req->snd_isn);
1206 ep->rcv_seq = be32_to_cpu(req->rcv_isn);
1207
1208 set_emss(ep, ntohs(req->tcp_opt));
1209
1210 /* dealloc the atid */
793dad94 1211 remove_handle(ep->com.dev, &ep->com.dev->atid_idr, atid);
cfdda9d7 1212 cxgb4_free_atid(t, atid);
793dad94 1213 set_bit(ACT_ESTAB, &ep->com.history);
cfdda9d7
SW		 1214
1215 /* start MPA negotiation */
4a740838 1216 ret = send_flowc(ep);
fef4422d
H		 1217 if (ret)
1218 goto err;
d2fe99e8 1219 if (ep->retry_with_mpa_v1)
caa6c9f2 1220 ret = send_mpa_req(ep, skb, 1);
d2fe99e8 1221 else
caa6c9f2
H		 1222 ret = send_mpa_req(ep, skb, mpa_rev);
1223 if (ret)
1224 goto err;
a7db89eb 1225 mutex_unlock(&ep->com.mutex);
cfdda9d7 1226 return 0;
fef4422d
H		 1227err:
1228 mutex_unlock(&ep->com.mutex);
1229 connect_reply_upcall(ep, -ENOMEM);
1230 c4iw_ep_disconnect(ep, 0, GFP_KERNEL);
1231 return 0;
cfdda9d7
SW		 1232}
1233
be13b2df 1234static void close_complete_upcall(struct c4iw_ep *ep, int status)
cfdda9d7
SW		 1235{
1236 struct iw_cm_event event;
1237
a9a42886 1238 pr_debug("%s ep %p tid %u\n", __func__, ep, ep->hwtid);
cfdda9d7
SW		 1239 memset(&event, 0, sizeof(event));
1240 event.event = IW_CM_EVENT_CLOSE;
be13b2df 1241 event.status = status;
cfdda9d7 1242 if (ep->com.cm_id) {
a9a42886
JP		 1243 pr_debug("close complete delivered ep %p cm_id %p tid %u\n",
1244 ep, ep->com.cm_id, ep->hwtid);
cfdda9d7 1245 ep->com.cm_id->event_handler(ep->com.cm_id, &event);
9ca6f7cf 1246 deref_cm_id(&ep->com);
793dad94 1247 set_bit(CLOSE_UPCALL, &ep->com.history);
cfdda9d7
SW		 1248 }
1249}
1250
cfdda9d7
SW		 1251static void peer_close_upcall(struct c4iw_ep *ep)
1252{
1253 struct iw_cm_event event;
1254
a9a42886 1255 pr_debug("%s ep %p tid %u\n", __func__, ep, ep->hwtid);
cfdda9d7
SW		 1256 memset(&event, 0, sizeof(event));
1257 event.event = IW_CM_EVENT_DISCONNECT;
1258 if (ep->com.cm_id) {
a9a42886
JP		 1259 pr_debug("peer close delivered ep %p cm_id %p tid %u\n",
1260 ep, ep->com.cm_id, ep->hwtid);
cfdda9d7 1261 ep->com.cm_id->event_handler(ep->com.cm_id, &event);
793dad94 1262 set_bit(DISCONN_UPCALL, &ep->com.history);
cfdda9d7
SW		 1263 }
1264}
1265
1266static void peer_abort_upcall(struct c4iw_ep *ep)
1267{
1268 struct iw_cm_event event;
1269
a9a42886 1270 pr_debug("%s ep %p tid %u\n", __func__, ep, ep->hwtid);
cfdda9d7
SW		 1271 memset(&event, 0, sizeof(event));
1272 event.event = IW_CM_EVENT_CLOSE;
1273 event.status = -ECONNRESET;
1274 if (ep->com.cm_id) {
a9a42886
JP		 1275 pr_debug("abort delivered ep %p cm_id %p tid %u\n", ep,
1276 ep->com.cm_id, ep->hwtid);
cfdda9d7 1277 ep->com.cm_id->event_handler(ep->com.cm_id, &event);
9ca6f7cf 1278 deref_cm_id(&ep->com);
793dad94 1279 set_bit(ABORT_UPCALL, &ep->com.history);
cfdda9d7
SW		 1280 }
1281}
1282
1283static void connect_reply_upcall(struct c4iw_ep *ep, int status)
1284{
1285 struct iw_cm_event event;
1286
a9a42886
JP		 1287 pr_debug("%s ep %p tid %u status %d\n",
1288 __func__, ep, ep->hwtid, status);
cfdda9d7
SW		 1289 memset(&event, 0, sizeof(event));
1290 event.event = IW_CM_EVENT_CONNECT_REPLY;
1291 event.status = status;
24d44a39
SW		 1292 memcpy(&event.local_addr, &ep->com.local_addr,
1293 sizeof(ep->com.local_addr));
1294 memcpy(&event.remote_addr, &ep->com.remote_addr,
1295 sizeof(ep->com.remote_addr));
cfdda9d7
SW		 1296
1297 if ((status == 0) || (status == -ECONNREFUSED)) {
d2fe99e8
KS		 1298 if (!ep->tried_with_mpa_v1) {
1299 /* this means MPA_v2 is used */
158c776d
H		 1300 event.ord = ep->ird;
1301 event.ird = ep->ord;
d2fe99e8
KS		 1302 event.private_data_len = ep->plen -
1303 sizeof(struct mpa_v2_conn_params);
1304 event.private_data = ep->mpa_pkt +
1305 sizeof(struct mpa_message) +
1306 sizeof(struct mpa_v2_conn_params);
1307 } else {
1308 /* this means MPA_v1 is used */
158c776d
H		 1309 event.ord = cur_max_read_depth(ep->com.dev);
1310 event.ird = cur_max_read_depth(ep->com.dev);
d2fe99e8
KS		 1311 event.private_data_len = ep->plen;
1312 event.private_data = ep->mpa_pkt +
1313 sizeof(struct mpa_message);
1314 }
cfdda9d7 1315 }
85963e4c 1316
a9a42886
JP		 1317 pr_debug("%s ep %p tid %u status %d\n", __func__, ep,
1318 ep->hwtid, status);
793dad94 1319 set_bit(CONN_RPL_UPCALL, &ep->com.history);
85963e4c
RD		 1320 ep->com.cm_id->event_handler(ep->com.cm_id, &event);
1321
9ca6f7cf
H		 1322 if (status < 0)
1323 deref_cm_id(&ep->com);
cfdda9d7
SW		 1324}
1325
be13b2df 1326static int connect_request_upcall(struct c4iw_ep *ep)
cfdda9d7
SW		 1327{
1328 struct iw_cm_event event;
be13b2df 1329 int ret;
cfdda9d7 1330
a9a42886 1331 pr_debug("%s ep %p tid %u\n", __func__, ep, ep->hwtid);
cfdda9d7
SW		 1332 memset(&event, 0, sizeof(event));
1333 event.event = IW_CM_EVENT_CONNECT_REQUEST;
24d44a39
SW		 1334 memcpy(&event.local_addr, &ep->com.local_addr,
1335 sizeof(ep->com.local_addr));
1336 memcpy(&event.remote_addr, &ep->com.remote_addr,
1337 sizeof(ep->com.remote_addr));
cfdda9d7 1338 event.provider_data = ep;
d2fe99e8
KS		 1339 if (!ep->tried_with_mpa_v1) {
1340 /* this means MPA_v2 is used */
1341 event.ord = ep->ord;
1342 event.ird = ep->ird;
1343 event.private_data_len = ep->plen -
1344 sizeof(struct mpa_v2_conn_params);
1345 event.private_data = ep->mpa_pkt + sizeof(struct mpa_message) +
1346 sizeof(struct mpa_v2_conn_params);
1347 } else {
1348 /* this means MPA_v1 is used. Send max supported */
4c2c5763
HS		 1349 event.ord = cur_max_read_depth(ep->com.dev);
1350 event.ird = cur_max_read_depth(ep->com.dev);
d2fe99e8
KS		 1351 event.private_data_len = ep->plen;
1352 event.private_data = ep->mpa_pkt + sizeof(struct mpa_message);
1353 }
be13b2df
SW		 1354 c4iw_get_ep(&ep->com);
1355 ret = ep->parent_ep->com.cm_id->event_handler(ep->parent_ep->com.cm_id,
1356 &event);
1357 if (ret)
1358 c4iw_put_ep(&ep->com);
793dad94 1359 set_bit(CONNREQ_UPCALL, &ep->com.history);
cfdda9d7 1360 c4iw_put_ep(&ep->parent_ep->com);
be13b2df 1361 return ret;
cfdda9d7
SW		 1362}
1363
1364static void established_upcall(struct c4iw_ep *ep)
1365{
1366 struct iw_cm_event event;
1367
a9a42886 1368 pr_debug("%s ep %p tid %u\n", __func__, ep, ep->hwtid);
cfdda9d7
SW		 1369 memset(&event, 0, sizeof(event));
1370 event.event = IW_CM_EVENT_ESTABLISHED;
3dd9a5dc
H		 1371 event.ird = ep->ord;
1372 event.ord = ep->ird;
cfdda9d7 1373 if (ep->com.cm_id) {
a9a42886 1374 pr_debug("%s ep %p tid %u\n", __func__, ep, ep->hwtid);
cfdda9d7 1375 ep->com.cm_id->event_handler(ep->com.cm_id, &event);
793dad94 1376 set_bit(ESTAB_UPCALL, &ep->com.history);
cfdda9d7
SW		 1377 }
1378}
1379
1380static int update_rx_credits(struct c4iw_ep *ep, u32 credits)
1381{
cfdda9d7 1382 struct sk_buff *skb;
6e3b6fc2
VP		 1383 u32 wrlen = roundup(sizeof(struct cpl_rx_data_ack), 16);
1384 u32 credit_dack;
cfdda9d7 1385
a9a42886
JP		 1386 pr_debug("%s ep %p tid %u credits %u\n",
1387 __func__, ep, ep->hwtid, credits);
cfdda9d7
SW		 1388 skb = get_skb(NULL, wrlen, GFP_KERNEL);
1389 if (!skb) {
700456bd 1390 pr_err("update_rx_credits - cannot alloc skb!\n");
cfdda9d7
SW		 1391 return 0;
1392 }
1393
b408ff28
HS		 1394 /*
1395 * If we couldn't specify the entire rcv window at connection setup
1396 * due to the limit in the number of bits in the RCV_BUFSIZ field,
1397 * then add the overage in to the credits returned.
1398 */
d7990b0c
AB		 1399 if (ep->rcv_win > RCV_BUFSIZ_M * 1024)
1400 credits += ep->rcv_win - RCV_BUFSIZ_M * 1024;
b408ff28 1401
6e3b6fc2
VP		 1402 credit_dack = credits | RX_FORCE_ACK_F | RX_DACK_CHANGE_F |
1403 RX_DACK_MODE_V(dack_mode);
1404
1405 cxgb_mk_rx_data_ack(skb, wrlen, ep->hwtid, ep->ctrlq_idx,
1406 credit_dack);
1407
cfdda9d7
SW		 1408 c4iw_ofld_send(&ep->com.dev->rdev, skb);
1409 return credits;
1410}
1411
4c2c5763
HS		 1412#define RELAXED_IRD_NEGOTIATION 1
1413
f8e1e1d1
H		 1414/*
1415 * process_mpa_reply - process streaming mode MPA reply
1416 *
1417 * Returns:
1418 *
1419 * 0 upon success indicating a connect request was delivered to the ULP
1420 * or the mpa request is incomplete but valid so far.
1421 *
1422 * 1 if a failure requires the caller to close the connection.
1423 *
1424 * 2 if a failure requires the caller to abort the connection.
1425 */
cc18b939 1426static int process_mpa_reply(struct c4iw_ep *ep, struct sk_buff *skb)
cfdda9d7
SW		 1427{
1428 struct mpa_message *mpa;
d2fe99e8 1429 struct mpa_v2_conn_params *mpa_v2_params;
cfdda9d7 1430 u16 plen;
d2fe99e8
KS		 1431 u16 resp_ird, resp_ord;
1432 u8 rtr_mismatch = 0, insuff_ird = 0;
cfdda9d7
SW		 1433 struct c4iw_qp_attributes attrs;
1434 enum c4iw_qp_attr_mask mask;
1435 int err;
cc18b939 1436 int disconnect = 0;
cfdda9d7 1437
a9a42886 1438 pr_debug("%s ep %p tid %u\n", __func__, ep, ep->hwtid);
cfdda9d7 1439
cfdda9d7
SW		 1440 /*
1441 * If we get more than the supported amount of private data
1442 * then we must fail this connection.
1443 */
1444 if (ep->mpa_pkt_len + skb->len > sizeof(ep->mpa_pkt)) {
1445 err = -EINVAL;
da1cecdf 1446 goto err_stop_timer;
cfdda9d7
SW		 1447 }
1448
1449 /*
1450 * copy the new data into our accumulation buffer.
1451 */
1452 skb_copy_from_linear_data(skb, &(ep->mpa_pkt[ep->mpa_pkt_len]),
1453 skb->len);
1454 ep->mpa_pkt_len += skb->len;
1455
1456 /*
1457 * if we don't even have the mpa message, then bail.
1458 */
1459 if (ep->mpa_pkt_len < sizeof(*mpa))
cc18b939 1460 return 0;
cfdda9d7
SW		 1461 mpa = (struct mpa_message *) ep->mpa_pkt;
1462
1463 /* Validate MPA header. */
d2fe99e8 1464 if (mpa->revision > mpa_rev) {
700456bd
JP		 1465 pr_err("%s MPA version mismatch. Local = %d, Received = %d\n",
1466 __func__, mpa_rev, mpa->revision);
cfdda9d7 1467 err = -EPROTO;
da1cecdf 1468 goto err_stop_timer;
cfdda9d7
SW		 1469 }
1470 if (memcmp(mpa->key, MPA_KEY_REP, sizeof(mpa->key))) {
1471 err = -EPROTO;
da1cecdf 1472 goto err_stop_timer;
cfdda9d7
SW		 1473 }
1474
1475 plen = ntohs(mpa->private_data_size);
1476
1477 /*
1478 * Fail if there's too much private data.
1479 */
1480 if (plen > MPA_MAX_PRIVATE_DATA) {
1481 err = -EPROTO;
da1cecdf 1482 goto err_stop_timer;
cfdda9d7
SW		 1483 }
1484
1485 /*
1486 * If plen does not account for pkt size
1487 */
1488 if (ep->mpa_pkt_len > (sizeof(*mpa) + plen)) {
1489 err = -EPROTO;
da1cecdf 1490 goto err_stop_timer;
cfdda9d7
SW		 1491 }
1492
1493 ep->plen = (u8) plen;
1494
1495 /*
1496 * If we don't have all the pdata yet, then bail.
1497 * We'll continue process when more data arrives.
1498 */
1499 if (ep->mpa_pkt_len < (sizeof(*mpa) + plen))
cc18b939 1500 return 0;
cfdda9d7
SW		 1501
1502 if (mpa->flags & MPA_REJECT) {
1503 err = -ECONNREFUSED;
da1cecdf 1504 goto err_stop_timer;
cfdda9d7
SW		 1505 }
1506
da1cecdf
H		 1507 /*
1508 * Stop mpa timer. If it expired, then
1509 * we ignore the MPA reply. process_timeout()
1510 * will abort the connection.
1511 */
1512 if (stop_ep_timer(ep))
1513 return 0;
1514
cfdda9d7
SW		 1515 /*
1516 * If we get here we have accumulated the entire mpa
1517 * start reply message including private data. And
1518 * the MPA header is valid.
1519 */
c529fb50 1520 __state_set(&ep->com, FPDU_MODE);
cfdda9d7 1521 ep->mpa_attr.crc_enabled = (mpa->flags & MPA_CRC) | crc_enabled ? 1 : 0;
cfdda9d7 1522 ep->mpa_attr.xmit_marker_enabled = mpa->flags & MPA_MARKERS ? 1 : 0;
d2fe99e8
KS		 1523 ep->mpa_attr.version = mpa->revision;
1524 ep->mpa_attr.p2p_type = FW_RI_INIT_P2PTYPE_DISABLED;
1525
1526 if (mpa->revision == 2) {
1527 ep->mpa_attr.enhanced_rdma_conn =
1528 mpa->flags & MPA_ENHANCED_RDMA_CONN ? 1 : 0;
1529 if (ep->mpa_attr.enhanced_rdma_conn) {
1530 mpa_v2_params = (struct mpa_v2_conn_params *)
1531 (ep->mpa_pkt + sizeof(*mpa));
1532 resp_ird = ntohs(mpa_v2_params->ird) &
1533 MPA_V2_IRD_ORD_MASK;
1534 resp_ord = ntohs(mpa_v2_params->ord) &
1535 MPA_V2_IRD_ORD_MASK;
a9a42886
JP		 1536 pr_debug("%s responder ird %u ord %u ep ird %u ord %u\n",
1537 __func__,
1538 resp_ird, resp_ord, ep->ird, ep->ord);
d2fe99e8
KS		 1539
1540 /*
1541 * This is a double-check. Ideally, below checks are
1542 * not required since ird/ord stuff has been taken
1543 * care of in c4iw_accept_cr
1544 */
4c2c5763
HS		 1545 if (ep->ird < resp_ord) {
1546 if (RELAXED_IRD_NEGOTIATION && resp_ord <=
1547 ep->com.dev->rdev.lldi.max_ordird_qp)
1548 ep->ird = resp_ord;
1549 else
1550 insuff_ird = 1;
1551 } else if (ep->ird > resp_ord) {
1552 ep->ird = resp_ord;
1553 }
1554 if (ep->ord > resp_ird) {
1555 if (RELAXED_IRD_NEGOTIATION)
1556 ep->ord = resp_ird;
1557 else
1558 insuff_ird = 1;
1559 }
1560 if (insuff_ird) {
d2fe99e8
KS		 1561 err = -ENOMEM;
1562 ep->ird = resp_ord;
1563 ep->ord = resp_ird;
d2fe99e8
KS		 1564 }
1565
1566 if (ntohs(mpa_v2_params->ird) &
1567 MPA_V2_PEER2PEER_MODEL) {
1568 if (ntohs(mpa_v2_params->ord) &
1569 MPA_V2_RDMA_WRITE_RTR)
1570 ep->mpa_attr.p2p_type =
1571 FW_RI_INIT_P2PTYPE_RDMA_WRITE;
1572 else if (ntohs(mpa_v2_params->ord) &
1573 MPA_V2_RDMA_READ_RTR)
1574 ep->mpa_attr.p2p_type =
1575 FW_RI_INIT_P2PTYPE_READ_REQ;
1576 }
1577 }
1578 } else if (mpa->revision == 1)
1579 if (peer2peer)
1580 ep->mpa_attr.p2p_type = p2p_type;
1581
a9a42886
JP		 1582 pr_debug("%s - crc_enabled=%d, recv_marker_enabled=%d, xmit_marker_enabled=%d, version=%d p2p_type=%d local-p2p_type = %d\n",
1583 __func__, ep->mpa_attr.crc_enabled,
1584 ep->mpa_attr.recv_marker_enabled,
1585 ep->mpa_attr.xmit_marker_enabled, ep->mpa_attr.version,
1586 ep->mpa_attr.p2p_type, p2p_type);
d2fe99e8
KS		 1587
1588 /*
1589 * If responder's RTR does not match with that of initiator, assign
1590 * FW_RI_INIT_P2PTYPE_DISABLED in mpa attributes so that RTR is not
1591 * generated when moving QP to RTS state.
1592 * A TERM message will be sent after QP has moved to RTS state
1593 */
91018f86 1594 if ((ep->mpa_attr.version == 2) && peer2peer &&
d2fe99e8
KS		 1595 (ep->mpa_attr.p2p_type != p2p_type)) {
1596 ep->mpa_attr.p2p_type = FW_RI_INIT_P2PTYPE_DISABLED;
1597 rtr_mismatch = 1;
1598 }
cfdda9d7
SW		 1599
1600 attrs.mpa_attr = ep->mpa_attr;
1601 attrs.max_ird = ep->ird;
1602 attrs.max_ord = ep->ord;
1603 attrs.llp_stream_handle = ep;
1604 attrs.next_state = C4IW_QP_STATE_RTS;
1605
1606 mask = C4IW_QP_ATTR_NEXT_STATE |
1607 C4IW_QP_ATTR_LLP_STREAM_HANDLE | C4IW_QP_ATTR_MPA_ATTR |
1608 C4IW_QP_ATTR_MAX_IRD | C4IW_QP_ATTR_MAX_ORD;
1609
1610 /* bind QP and TID with INIT_WR */
1611 err = c4iw_modify_qp(ep->com.qp->rhp,
1612 ep->com.qp, mask, &attrs, 1);
1613 if (err)
1614 goto err;
d2fe99e8
KS		 1615
1616 /*
1617 * If responder's RTR requirement did not match with what initiator
1618 * supports, generate TERM message
1619 */
1620 if (rtr_mismatch) {
700456bd 1621 pr_err("%s: RTR mismatch, sending TERM\n", __func__);
d2fe99e8
KS		 1622 attrs.layer_etype = LAYER_MPA | DDP_LLP;
1623 attrs.ecode = MPA_NOMATCH_RTR;
1624 attrs.next_state = C4IW_QP_STATE_TERMINATE;
cc18b939 1625 attrs.send_term = 1;
d2fe99e8 1626 err = c4iw_modify_qp(ep->com.qp->rhp, ep->com.qp,
cc18b939 1627 C4IW_QP_ATTR_NEXT_STATE, &attrs, 1);
d2fe99e8 1628 err = -ENOMEM;
cc18b939 1629 disconnect = 1;
d2fe99e8
KS		 1630 goto out;
1631 }
1632
1633 /*
1634 * Generate TERM if initiator IRD is not sufficient for responder
1635 * provided ORD. Currently, we do the same behaviour even when
1636 * responder provided IRD is also not sufficient as regards to
1637 * initiator ORD.
1638 */
1639 if (insuff_ird) {
700456bd 1640 pr_err("%s: Insufficient IRD, sending TERM\n", __func__);
d2fe99e8
KS		 1641 attrs.layer_etype = LAYER_MPA | DDP_LLP;
1642 attrs.ecode = MPA_INSUFF_IRD;
1643 attrs.next_state = C4IW_QP_STATE_TERMINATE;
cc18b939 1644 attrs.send_term = 1;
d2fe99e8 1645 err = c4iw_modify_qp(ep->com.qp->rhp, ep->com.qp,
cc18b939 1646 C4IW_QP_ATTR_NEXT_STATE, &attrs, 1);
d2fe99e8 1647 err = -ENOMEM;
cc18b939 1648 disconnect = 1;
d2fe99e8
KS		 1649 goto out;
1650 }
cfdda9d7 1651 goto out;
da1cecdf
H		 1652err_stop_timer:
1653 stop_ep_timer(ep);
cfdda9d7 1654err:
f8e1e1d1 1655 disconnect = 2;
cfdda9d7
SW		 1656out:
1657 connect_reply_upcall(ep, err);
cc18b939 1658 return disconnect;
cfdda9d7
SW		 1659}
1660
fd6aabe4
H		 1661/*
1662 * process_mpa_request - process streaming mode MPA request
1663 *
1664 * Returns:
1665 *
1666 * 0 upon success indicating a connect request was delivered to the ULP
1667 * or the mpa request is incomplete but valid so far.
1668 *
1669 * 1 if a failure requires the caller to close the connection.
1670 *
1671 * 2 if a failure requires the caller to abort the connection.
1672 */
1673static int process_mpa_request(struct c4iw_ep *ep, struct sk_buff *skb)
cfdda9d7
SW		 1674{
1675 struct mpa_message *mpa;
d2fe99e8 1676 struct mpa_v2_conn_params *mpa_v2_params;
cfdda9d7
SW		 1677 u16 plen;
1678
a9a42886 1679 pr_debug("%s ep %p tid %u\n", __func__, ep, ep->hwtid);
cfdda9d7 1680
cfdda9d7
SW		 1681 /*
1682 * If we get more than the supported amount of private data
1683 * then we must fail this connection.
1684 */
fd6aabe4
H		 1685 if (ep->mpa_pkt_len + skb->len > sizeof(ep->mpa_pkt))
1686 goto err_stop_timer;
cfdda9d7 1687
a9a42886 1688 pr_debug("%s enter (%s line %u)\n", __func__, __FILE__, __LINE__);
cfdda9d7
SW		 1689
1690 /*
1691 * Copy the new data into our accumulation buffer.
1692 */
1693 skb_copy_from_linear_data(skb, &(ep->mpa_pkt[ep->mpa_pkt_len]),
1694 skb->len);
1695 ep->mpa_pkt_len += skb->len;
1696
1697 /*
1698 * If we don't even have the mpa message, then bail.
1699 * We'll continue process when more data arrives.
1700 */
1701 if (ep->mpa_pkt_len < sizeof(*mpa))
fd6aabe4 1702 return 0;
cfdda9d7 1703
a9a42886 1704 pr_debug("%s enter (%s line %u)\n", __func__, __FILE__, __LINE__);
cfdda9d7
SW		 1705 mpa = (struct mpa_message *) ep->mpa_pkt;
1706
1707 /*
1708 * Validate MPA Header.
1709 */
d2fe99e8 1710 if (mpa->revision > mpa_rev) {
700456bd
JP		 1711 pr_err("%s MPA version mismatch. Local = %d, Received = %d\n",
1712 __func__, mpa_rev, mpa->revision);
fd6aabe4 1713 goto err_stop_timer;
cfdda9d7
SW		 1714 }
1715
fd6aabe4
H		 1716 if (memcmp(mpa->key, MPA_KEY_REQ, sizeof(mpa->key)))
1717 goto err_stop_timer;
cfdda9d7
SW		 1718
1719 plen = ntohs(mpa->private_data_size);
1720
1721 /*
1722 * Fail if there's too much private data.
1723 */
fd6aabe4
H		 1724 if (plen > MPA_MAX_PRIVATE_DATA)
1725 goto err_stop_timer;
cfdda9d7
SW		 1726
1727 /*
1728 * If plen does not account for pkt size
1729 */
fd6aabe4
H		 1730 if (ep->mpa_pkt_len > (sizeof(*mpa) + plen))
1731 goto err_stop_timer;
cfdda9d7
SW		 1732 ep->plen = (u8) plen;
1733
1734 /*
1735 * If we don't have all the pdata yet, then bail.
1736 */
1737 if (ep->mpa_pkt_len < (sizeof(*mpa) + plen))
fd6aabe4 1738 return 0;
cfdda9d7
SW		 1739
1740 /*
1741 * If we get here we have accumulated the entire mpa
1742 * start reply message including private data.
1743 */
1744 ep->mpa_attr.initiator = 0;
1745 ep->mpa_attr.crc_enabled = (mpa->flags & MPA_CRC) | crc_enabled ? 1 : 0;
1746 ep->mpa_attr.recv_marker_enabled = markers_enabled;
1747 ep->mpa_attr.xmit_marker_enabled = mpa->flags & MPA_MARKERS ? 1 : 0;
d2fe99e8
KS		 1748 ep->mpa_attr.version = mpa->revision;
1749 if (mpa->revision == 1)
1750 ep->tried_with_mpa_v1 = 1;
1751 ep->mpa_attr.p2p_type = FW_RI_INIT_P2PTYPE_DISABLED;
1752
1753 if (mpa->revision == 2) {
1754 ep->mpa_attr.enhanced_rdma_conn =
1755 mpa->flags & MPA_ENHANCED_RDMA_CONN ? 1 : 0;
1756 if (ep->mpa_attr.enhanced_rdma_conn) {
1757 mpa_v2_params = (struct mpa_v2_conn_params *)
1758 (ep->mpa_pkt + sizeof(*mpa));
1759 ep->ird = ntohs(mpa_v2_params->ird) &
1760 MPA_V2_IRD_ORD_MASK;
7f446abf
SW		 1761 ep->ird = min_t(u32, ep->ird,
1762 cur_max_read_depth(ep->com.dev));
d2fe99e8
KS		 1763 ep->ord = ntohs(mpa_v2_params->ord) &
1764 MPA_V2_IRD_ORD_MASK;
7f446abf
SW		 1765 ep->ord = min_t(u32, ep->ord,
1766 cur_max_read_depth(ep->com.dev));
a9a42886
JP		 1767 pr_debug("%s initiator ird %u ord %u\n",
1768 __func__, ep->ird, ep->ord);
d2fe99e8
KS		 1769 if (ntohs(mpa_v2_params->ird) & MPA_V2_PEER2PEER_MODEL)
1770 if (peer2peer) {
1771 if (ntohs(mpa_v2_params->ord) &
1772 MPA_V2_RDMA_WRITE_RTR)
1773 ep->mpa_attr.p2p_type =
1774 FW_RI_INIT_P2PTYPE_RDMA_WRITE;
1775 else if (ntohs(mpa_v2_params->ord) &
1776 MPA_V2_RDMA_READ_RTR)
1777 ep->mpa_attr.p2p_type =
1778 FW_RI_INIT_P2PTYPE_READ_REQ;
1779 }
1780 }
1781 } else if (mpa->revision == 1)
1782 if (peer2peer)
1783 ep->mpa_attr.p2p_type = p2p_type;
1784
a9a42886
JP		 1785 pr_debug("%s - crc_enabled=%d, recv_marker_enabled=%d, xmit_marker_enabled=%d, version=%d p2p_type=%d\n",
1786 __func__,
1787 ep->mpa_attr.crc_enabled, ep->mpa_attr.recv_marker_enabled,
1788 ep->mpa_attr.xmit_marker_enabled, ep->mpa_attr.version,
1789 ep->mpa_attr.p2p_type);
cfdda9d7 1790
e4b76a2a
H		 1791 __state_set(&ep->com, MPA_REQ_RCVD);
1792
1793 /* drive upcall */
1794 mutex_lock_nested(&ep->parent_ep->com.mutex, SINGLE_DEPTH_NESTING);
1795 if (ep->parent_ep->com.state != DEAD) {
1796 if (connect_request_upcall(ep))
fd6aabe4 1797 goto err_unlock_parent;
e4b76a2a
H		 1798 } else {
1799 goto err_unlock_parent;
be13b2df 1800 }
e4b76a2a 1801 mutex_unlock(&ep->parent_ep->com.mutex);
fd6aabe4
H		 1802 return 0;
1803
1804err_unlock_parent:
1805 mutex_unlock(&ep->parent_ep->com.mutex);
1806 goto err_out;
1807err_stop_timer:
1808 (void)stop_ep_timer(ep);
1809err_out:
1810 return 2;
cfdda9d7
SW		 1811}
1812
1813static int rx_data(struct c4iw_dev *dev, struct sk_buff *skb)
1814{
1815 struct c4iw_ep *ep;
1816 struct cpl_rx_data *hdr = cplhdr(skb);
1817 unsigned int dlen = ntohs(hdr->len);
1818 unsigned int tid = GET_TID(hdr);
793dad94 1819 __u8 status = hdr->status;
cc18b939 1820 int disconnect = 0;
cfdda9d7 1821
944661dd 1822 ep = get_ep_from_tid(dev, tid);
977116c6
SW		 1823 if (!ep)
1824 return 0;
a9a42886 1825 pr_debug("%s ep %p tid %u dlen %u\n", __func__, ep, ep->hwtid, dlen);
cfdda9d7
SW		 1826 skb_pull(skb, sizeof(*hdr));
1827 skb_trim(skb, dlen);
c529fb50 1828 mutex_lock(&ep->com.mutex);
cfdda9d7 1829
c529fb50 1830 switch (ep->com.state) {
cfdda9d7 1831 case MPA_REQ_SENT:
3bcf96e0 1832 update_rx_credits(ep, dlen);
55abf8df 1833 ep->rcv_seq += dlen;
cc18b939 1834 disconnect = process_mpa_reply(ep, skb);
cfdda9d7
SW		 1835 break;
1836 case MPA_REQ_WAIT:
3bcf96e0 1837 update_rx_credits(ep, dlen);
55abf8df 1838 ep->rcv_seq += dlen;
4a4dd8db 1839 disconnect = process_mpa_request(ep, skb);
cfdda9d7 1840 break;
1557967b
VP		 1841 case FPDU_MODE: {
1842 struct c4iw_qp_attributes attrs;
3bcf96e0
SW		 1843
1844 update_rx_credits(ep, dlen);
1557967b 1845 BUG_ON(!ep->com.qp);
e8e5b927 1846 if (status)
1557967b 1847 pr_err("%s Unexpected streaming data." \
04236df2
VP		 1848 " qpid %u ep %p state %d tid %u status %d\n",
1849 __func__, ep->com.qp->wq.sq.qid, ep,
c529fb50 1850 ep->com.state, ep->hwtid, status);
97d7ec0c 1851 attrs.next_state = C4IW_QP_STATE_TERMINATE;
1557967b 1852 c4iw_modify_qp(ep->com.qp->rhp, ep->com.qp,
cc18b939
SW		 1853 C4IW_QP_ATTR_NEXT_STATE, &attrs, 1);
1854 disconnect = 1;
cfdda9d7
SW		 1855 break;
1856 }
1557967b
VP		 1857 default:
1858 break;
1859 }
c529fb50 1860 mutex_unlock(&ep->com.mutex);
cc18b939 1861 if (disconnect)
4a4dd8db 1862 c4iw_ep_disconnect(ep, disconnect == 2, GFP_KERNEL);
944661dd 1863 c4iw_put_ep(&ep->com);
cfdda9d7
SW		 1864 return 0;
1865}
1866
1867static int abort_rpl(struct c4iw_dev *dev, struct sk_buff *skb)
1868{
1869 struct c4iw_ep *ep;
1870 struct cpl_abort_rpl_rss *rpl = cplhdr(skb);
cfdda9d7
SW		 1871 int release = 0;
1872 unsigned int tid = GET_TID(rpl);
cfdda9d7 1873
944661dd 1874 ep = get_ep_from_tid(dev, tid);
4984037b 1875 if (!ep) {
700456bd 1876 pr_warn("Abort rpl to freed endpoint\n");
4984037b
VP		 1877 return 0;
1878 }
a9a42886 1879 pr_debug("%s ep %p tid %u\n", __func__, ep, ep->hwtid);
2f5b48c3 1880 mutex_lock(&ep->com.mutex);
cfdda9d7
SW		 1881 switch (ep->com.state) {
1882 case ABORTING:
91e9c071 1883 c4iw_wake_up(&ep->com.wr_wait, -ECONNRESET);
cfdda9d7
SW		 1884 __state_set(&ep->com, DEAD);
1885 release = 1;
1886 break;
1887 default:
700456bd 1888 pr_err("%s ep %p state %d\n", __func__, ep, ep->com.state);
cfdda9d7
SW		 1889 break;
1890 }
2f5b48c3 1891 mutex_unlock(&ep->com.mutex);
cfdda9d7
SW		 1892
1893 if (release)
1894 release_ep_resources(ep);
944661dd 1895 c4iw_put_ep(&ep->com);
cfdda9d7
SW		 1896 return 0;
1897}
1898
caa6c9f2 1899static int send_fw_act_open_req(struct c4iw_ep *ep, unsigned int atid)
5be78ee9
VP		 1900{
1901 struct sk_buff *skb;
1902 struct fw_ofld_connection_wr *req;
1903 unsigned int mtu_idx;
cc516700 1904 u32 wscale;
830662f6 1905 struct sockaddr_in *sin;
b408ff28 1906 int win;
5be78ee9
VP		 1907
1908 skb = get_skb(NULL, sizeof(*req), GFP_KERNEL);
1909 req = (struct fw_ofld_connection_wr *)__skb_put(skb, sizeof(*req));
1910 memset(req, 0, sizeof(*req));
6c53e938 1911 req->op_compl = htonl(WR_OP_V(FW_OFLD_CONNECTION_WR));
e2ac9628 1912 req->len16_pkd = htonl(FW_WR_LEN16_V(DIV_ROUND_UP(sizeof(*req), 16)));
41b4f86c
KS		 1913 req->le.filter = cpu_to_be32(cxgb4_select_ntuple(
1914 ep->com.dev->rdev.lldi.ports[0],
5be78ee9 1915 ep->l2t));
170003c8 1916 sin = (struct sockaddr_in *)&ep->com.local_addr;
830662f6
VP		 1917 req->le.lport = sin->sin_port;
1918 req->le.u.ipv4.lip = sin->sin_addr.s_addr;
170003c8 1919 sin = (struct sockaddr_in *)&ep->com.remote_addr;
830662f6
VP		 1920 req->le.pport = sin->sin_port;
1921 req->le.u.ipv4.pip = sin->sin_addr.s_addr;
5be78ee9 1922 req->tcb.t_state_to_astid =
77a80e23
HS		 1923 htonl(FW_OFLD_CONNECTION_WR_T_STATE_V(TCP_SYN_SENT) |
1924 FW_OFLD_CONNECTION_WR_ASTID_V(atid));
5be78ee9 1925 req->tcb.cplrxdataack_cplpassacceptrpl =
77a80e23 1926 htons(FW_OFLD_CONNECTION_WR_CPLRXDATAACK_F);
ef5d6355 1927 req->tcb.tx_max = (__force __be32) jiffies;
793dad94 1928 req->tcb.rcv_adv = htons(1);
44c6d069
VP		 1929 cxgb_best_mtu(ep->com.dev->rdev.lldi.mtus, ep->mtu, &mtu_idx,
1930 enable_tcp_timestamps,
1931 (ep->com.remote_addr.ss_family == AF_INET) ? 0 : 1);
cc516700 1932 wscale = cxgb_compute_wscale(rcv_win);
b408ff28
HS		 1933
1934 /*
1935 * Specify the largest window that will fit in opt0. The
1936 * remainder will be specified in the rx_data_ack.
1937 */
1938 win = ep->rcv_win >> 10;
d7990b0c
AB		 1939 if (win > RCV_BUFSIZ_M)
1940 win = RCV_BUFSIZ_M;
b408ff28 1941
6c53e938
HS		 1942 req->tcb.opt0 = (__force __be64) (TCAM_BYPASS_F |
1943 (nocong ? NO_CONG_F : 0) |
d7990b0c 1944 KEEP_ALIVE_F |
6c53e938 1945 DELACK_F |
d7990b0c
AB		 1946 WND_SCALE_V(wscale) |
1947 MSS_IDX_V(mtu_idx) |
1948 L2T_IDX_V(ep->l2t->idx) |
1949 TX_CHAN_V(ep->tx_chan) |
1950 SMAC_SEL_V(ep->smac_idx) |
ac8e4c69 1951 DSCP_V(ep->tos >> 2) |
d7990b0c
AB		 1952 ULP_MODE_V(ULP_MODE_TCPDDP) |
1953 RCV_BUFSIZ_V(win));
6c53e938
HS		 1954 req->tcb.opt2 = (__force __be32) (PACE_V(1) |
1955 TX_QUEUE_V(ep->com.dev->rdev.lldi.tx_modq[ep->tx_chan]) |
d7990b0c 1956 RX_CHANNEL_V(0) |
6c53e938 1957 CCTRL_ECN_V(enable_ecn) |
d7990b0c 1958 RSS_QUEUE_VALID_F | RSS_QUEUE_V(ep->rss_qid));
5be78ee9 1959 if (enable_tcp_timestamps)
6c53e938 1960 req->tcb.opt2 |= (__force __be32)TSTAMPS_EN_F;
5be78ee9 1961 if (enable_tcp_sack)
6c53e938 1962 req->tcb.opt2 |= (__force __be32)SACK_EN_F;
5be78ee9 1963 if (wscale && enable_tcp_window_scaling)
d7990b0c
AB		 1964 req->tcb.opt2 |= (__force __be32)WND_SCALE_EN_F;
1965 req->tcb.opt0 = cpu_to_be64((__force u64)req->tcb.opt0);
1966 req->tcb.opt2 = cpu_to_be32((__force u32)req->tcb.opt2);
793dad94
VP		 1967 set_wr_txq(skb, CPL_PRIORITY_CONTROL, ep->ctrlq_idx);
1968 set_bit(ACT_OFLD_CONN, &ep->com.history);
caa6c9f2 1969 return c4iw_l2t_send(&ep->com.dev->rdev, skb, ep->l2t);
5be78ee9
VP		 1970}
1971
cfdda9d7 1972/*
4c72efef
H		 1973 * Some of the error codes above implicitly indicate that there is no TID
1974 * allocated with the result of an ACT_OPEN. We use this predicate to make
1975 * that explicit.
cfdda9d7
SW		 1976 */
1977static inline int act_open_has_tid(int status)
1978{
4c72efef
H		 1979 return (status != CPL_ERR_TCAM_PARITY &&
1980 status != CPL_ERR_TCAM_MISS &&
1981 status != CPL_ERR_TCAM_FULL &&
1982 status != CPL_ERR_CONN_EXIST_SYNRECV &&
1983 status != CPL_ERR_CONN_EXIST);
cfdda9d7
SW		 1984}
1985
dd92b124
HS		 1986static char *neg_adv_str(unsigned int status)
1987{
1988 switch (status) {
1989 case CPL_ERR_RTX_NEG_ADVICE:
1990 return "Retransmit timeout";
1991 case CPL_ERR_PERSIST_NEG_ADVICE:
1992 return "Persist timeout";
1993 case CPL_ERR_KEEPALV_NEG_ADVICE:
1994 return "Keepalive timeout";
1995 default:
1996 return "Unknown";
1997 }
1998}
1999
b408ff28
HS		 2000static void set_tcp_window(struct c4iw_ep *ep, struct port_info *pi)
2001{
2002 ep->snd_win = snd_win;
2003 ep->rcv_win = rcv_win;
a9a42886
JP		 2004 pr_debug("%s snd_win %d rcv_win %d\n",
2005 __func__, ep->snd_win, ep->rcv_win);
b408ff28
HS		 2006}
2007
793dad94
VP		 2008#define ACT_OPEN_RETRY_COUNT 2
2009
830662f6
VP		 2010static int import_ep(struct c4iw_ep *ep, int iptype, __u8 *peer_ip,
2011 struct dst_entry *dst, struct c4iw_dev *cdev,
ac8e4c69 2012 bool clear_mpa_v1, enum chip_type adapter_type, u8 tos)
830662f6
VP		 2013{
2014 struct neighbour *n;
2015 int err, step;
2016 struct net_device *pdev;
2017
2018 n = dst_neigh_lookup(dst, peer_ip);
2019 if (!n)
2020 return -ENODEV;
2021
2022 rcu_read_lock();
2023 err = -ENOMEM;
2024 if (n->dev->flags & IFF_LOOPBACK) {
2025 if (iptype == 4)
2026 pdev = ip_dev_find(&init_net, *(__be32 *)peer_ip);
2027 else if (IS_ENABLED(CONFIG_IPV6))
2028 for_each_netdev(&init_net, pdev) {
2029 if (ipv6_chk_addr(&init_net,
2030 (struct in6_addr *)peer_ip,
2031 pdev, 1))
2032 break;
2033 }
2034 else
2035 pdev = NULL;
2036
2037 if (!pdev) {
2038 err = -ENODEV;
2039 goto out;
2040 }
2041 ep->l2t = cxgb4_l2t_get(cdev->rdev.lldi.l2t,
ac8e4c69 2042 n, pdev, rt_tos2priority(tos));
609e941a
SW		 2043 if (!ep->l2t) {
2044 dev_put(pdev);
830662f6 2045 goto out;
609e941a 2046 }
830662f6
VP		 2047 ep->mtu = pdev->mtu;
2048 ep->tx_chan = cxgb4_port_chan(pdev);
963cab50
H		 2049 ep->smac_idx = cxgb4_tp_smt_idx(adapter_type,
2050 cxgb4_port_viid(pdev));
830662f6
VP		 2051 step = cdev->rdev.lldi.ntxq /
2052 cdev->rdev.lldi.nchan;
2053 ep->txq_idx = cxgb4_port_idx(pdev) * step;
2054 step = cdev->rdev.lldi.nrxq /
2055 cdev->rdev.lldi.nchan;
2056 ep->ctrlq_idx = cxgb4_port_idx(pdev);
2057 ep->rss_qid = cdev->rdev.lldi.rxq_ids[
2058 cxgb4_port_idx(pdev) * step];
b408ff28 2059 set_tcp_window(ep, (struct port_info *)netdev_priv(pdev));
830662f6
VP		 2060 dev_put(pdev);
2061 } else {
2062 pdev = get_real_dev(n->dev);
2063 ep->l2t = cxgb4_l2t_get(cdev->rdev.lldi.l2t,
2064 n, pdev, 0);
2065 if (!ep->l2t)
2066 goto out;
2067 ep->mtu = dst_mtu(dst);
11b8e22d 2068 ep->tx_chan = cxgb4_port_chan(pdev);
963cab50
H		 2069 ep->smac_idx = cxgb4_tp_smt_idx(adapter_type,
2070 cxgb4_port_viid(pdev));
830662f6
VP		 2071 step = cdev->rdev.lldi.ntxq /
2072 cdev->rdev.lldi.nchan;
11b8e22d
SW		 2073 ep->txq_idx = cxgb4_port_idx(pdev) * step;
2074 ep->ctrlq_idx = cxgb4_port_idx(pdev);
830662f6
VP		 2075 step = cdev->rdev.lldi.nrxq /
2076 cdev->rdev.lldi.nchan;
2077 ep->rss_qid = cdev->rdev.lldi.rxq_ids[
11b8e22d 2078 cxgb4_port_idx(pdev) * step];
b408ff28 2079 set_tcp_window(ep, (struct port_info *)netdev_priv(pdev));
830662f6
VP		 2080
2081 if (clear_mpa_v1) {
2082 ep->retry_with_mpa_v1 = 0;
2083 ep->tried_with_mpa_v1 = 0;
2084 }
2085 }
2086 err = 0;
2087out:
2088 rcu_read_unlock();
2089
2090 neigh_release(n);
2091
2092 return err;
2093}
2094
793dad94
VP		 2095static int c4iw_reconnect(struct c4iw_ep *ep)
2096{
2097 int err = 0;
4a740838 2098 int size = 0;
24d44a39 2099 struct sockaddr_in *laddr = (struct sockaddr_in *)
170003c8 2100 &ep->com.cm_id->m_local_addr;
24d44a39 2101 struct sockaddr_in *raddr = (struct sockaddr_in *)
170003c8 2102 &ep->com.cm_id->m_remote_addr;
830662f6 2103 struct sockaddr_in6 *laddr6 = (struct sockaddr_in6 *)
170003c8 2104 &ep->com.cm_id->m_local_addr;
830662f6 2105 struct sockaddr_in6 *raddr6 = (struct sockaddr_in6 *)
170003c8 2106 &ep->com.cm_id->m_remote_addr;
830662f6
VP		 2107 int iptype;
2108 __u8 *ra;
793dad94 2109
a9a42886 2110 pr_debug("%s qp %p cm_id %p\n", __func__, ep->com.qp, ep->com.cm_id);
793dad94 2111 init_timer(&ep->timer);
093108cb 2112 c4iw_init_wr_wait(&ep->com.wr_wait);
793dad94 2113
4a740838
H		 2114 /* When MPA revision is different on nodes, the node with MPA_rev=2
2115 * tries to reconnect with MPA_rev 1 for the same EP through
2116 * c4iw_reconnect(), where the same EP is assigned with new tid for
2117 * further connection establishment. As we are using the same EP pointer
2118 * for reconnect, few skbs are used during the previous c4iw_connect(),
2119 * which leaves the EP with inadequate skbs for further
2120 * c4iw_reconnect(), Further causing an assert BUG_ON() due to empty
2121 * skb_list() during peer_abort(). Allocate skbs which is already used.
2122 */
2123 size = (CN_MAX_CON_BUF - skb_queue_len(&ep->com.ep_skb_list));
2124 if (alloc_ep_skb_list(&ep->com.ep_skb_list, size)) {
2125 err = -ENOMEM;
2126 goto fail1;
2127 }
2128
793dad94
VP		 2129 /*
2130 * Allocate an active TID to initiate a TCP connection.
2131 */
2132 ep->atid = cxgb4_alloc_atid(ep->com.dev->rdev.lldi.tids, ep);
2133 if (ep->atid == -1) {
700456bd 2134 pr_err("%s - cannot alloc atid\n", __func__);
793dad94
VP		 2135 err = -ENOMEM;
2136 goto fail2;
2137 }
2138 insert_handle(ep->com.dev, &ep->com.dev->atid_idr, ep, ep->atid);
2139
2140 /* find a route */
170003c8 2141 if (ep->com.cm_id->m_local_addr.ss_family == AF_INET) {
804c2f3e
VP		 2142 ep->dst = cxgb_find_route(&ep->com.dev->rdev.lldi, get_real_dev,
2143 laddr->sin_addr.s_addr,
2144 raddr->sin_addr.s_addr,
2145 laddr->sin_port,
2146 raddr->sin_port, ep->com.cm_id->tos);
830662f6
VP		 2147 iptype = 4;
2148 ra = (__u8 *)&raddr->sin_addr;
2149 } else {
95554761
VP		 2150 ep->dst = cxgb_find_route6(&ep->com.dev->rdev.lldi,
2151 get_real_dev,
2152 laddr6->sin6_addr.s6_addr,
2153 raddr6->sin6_addr.s6_addr,
2154 laddr6->sin6_port,
2155 raddr6->sin6_port, 0,
2156 raddr6->sin6_scope_id);
830662f6
VP		 2157 iptype = 6;
2158 ra = (__u8 *)&raddr6->sin6_addr;
2159 }
2160 if (!ep->dst) {
700456bd 2161 pr_err("%s - cannot find route\n", __func__);
793dad94
VP		 2162 err = -EHOSTUNREACH;
2163 goto fail3;
2164 }
963cab50 2165 err = import_ep(ep, iptype, ra, ep->dst, ep->com.dev, false,
ac8e4c69
H		 2166 ep->com.dev->rdev.lldi.adapter_type,
2167 ep->com.cm_id->tos);
830662f6 2168 if (err) {
700456bd 2169 pr_err("%s - cannot alloc l2e\n", __func__);
793dad94
VP		 2170 goto fail4;
2171 }
2172
a9a42886
JP		 2173 pr_debug("%s txq_idx %u tx_chan %u smac_idx %u rss_qid %u l2t_idx %u\n",
2174 __func__, ep->txq_idx, ep->tx_chan, ep->smac_idx, ep->rss_qid,
2175 ep->l2t->idx);
793dad94
VP		 2176
2177 state_set(&ep->com, CONNECTING);
ac8e4c69 2178 ep->tos = ep->com.cm_id->tos;
793dad94
VP		 2179
2180 /* send connect request to rnic */
2181 err = send_connect(ep);
2182 if (!err)
2183 goto out;
2184
2185 cxgb4_l2t_release(ep->l2t);
2186fail4:
2187 dst_release(ep->dst);
2188fail3:
2189 remove_handle(ep->com.dev, &ep->com.dev->atid_idr, ep->atid);
2190 cxgb4_free_atid(ep->com.dev->rdev.lldi.tids, ep->atid);
2191fail2:
2192 /*
2193 * remember to send notification to upper layer.
2194 * We are in here so the upper layer is not aware that this is
2195 * re-connect attempt and so, upper layer is still waiting for
2196 * response of 1st connect request.
2197 */
2198 connect_reply_upcall(ep, -ECONNRESET);
4a740838 2199fail1:
793dad94
VP		 2200 c4iw_put_ep(&ep->com);
2201out:
2202 return err;
2203}
2204
cfdda9d7
SW		 2205static int act_open_rpl(struct c4iw_dev *dev, struct sk_buff *skb)
2206{
2207 struct c4iw_ep *ep;
2208 struct cpl_act_open_rpl *rpl = cplhdr(skb);
6c53e938
HS		 2209 unsigned int atid = TID_TID_G(AOPEN_ATID_G(
2210 ntohl(rpl->atid_status)));
cfdda9d7 2211 struct tid_info *t = dev->rdev.lldi.tids;
6c53e938 2212 int status = AOPEN_STATUS_G(ntohl(rpl->atid_status));
830662f6
VP		 2213 struct sockaddr_in *la;
2214 struct sockaddr_in *ra;
2215 struct sockaddr_in6 *la6;
2216 struct sockaddr_in6 *ra6;
caa6c9f2 2217 int ret = 0;
cfdda9d7
SW		 2218
2219 ep = lookup_atid(t, atid);
170003c8
SW		 2220 la = (struct sockaddr_in *)&ep->com.local_addr;
2221 ra = (struct sockaddr_in *)&ep->com.remote_addr;
2222 la6 = (struct sockaddr_in6 *)&ep->com.local_addr;
2223 ra6 = (struct sockaddr_in6 *)&ep->com.remote_addr;
cfdda9d7 2224
a9a42886
JP		 2225 pr_debug("%s ep %p atid %u status %u errno %d\n", __func__, ep, atid,
2226 status, status2errno(status));
cfdda9d7 2227
b65eef0a 2228 if (cxgb_is_neg_adv(status)) {
a9a42886
JP		 2229 pr_debug("%s Connection problems for atid %u status %u (%s)\n",
2230 __func__, atid, status, neg_adv_str(status));
179d03bb
H		 2231 ep->stats.connect_neg_adv++;
2232 mutex_lock(&dev->rdev.stats.lock);
2233 dev->rdev.stats.neg_adv++;
2234 mutex_unlock(&dev->rdev.stats.lock);
cfdda9d7
SW		 2235 return 0;
2236 }
2237
793dad94
VP		 2238 set_bit(ACT_OPEN_RPL, &ep->com.history);
2239
d716a2a0
VP		 2240 /*
2241 * Log interesting failures.
2242 */
2243 switch (status) {
2244 case CPL_ERR_CONN_RESET:
2245 case CPL_ERR_CONN_TIMEDOUT:
2246 break;
5be78ee9 2247 case CPL_ERR_TCAM_FULL:
830662f6 2248 mutex_lock(&dev->rdev.stats.lock);
3b174d94 2249 dev->rdev.stats.tcam_full++;
830662f6
VP		 2250 mutex_unlock(&dev->rdev.stats.lock);
2251 if (ep->com.local_addr.ss_family == AF_INET &&
2252 dev->rdev.lldi.enable_fw_ofld_conn) {
caa6c9f2
H		 2253 ret = send_fw_act_open_req(ep, TID_TID_G(AOPEN_ATID_G(
2254 ntohl(rpl->atid_status))));
2255 if (ret)
2256 goto fail;
793dad94
VP		 2257 return 0;
2258 }
2259 break;
2260 case CPL_ERR_CONN_EXIST:
2261 if (ep->retry_count++ < ACT_OPEN_RETRY_COUNT) {
2262 set_bit(ACT_RETRY_INUSE, &ep->com.history);
84cc6ac6
H		 2263 if (ep->com.remote_addr.ss_family == AF_INET6) {
2264 struct sockaddr_in6 *sin6 =
2265 (struct sockaddr_in6 *)
170003c8 2266 &ep->com.local_addr;
84cc6ac6
H		 2267 cxgb4_clip_release(
2268 ep->com.dev->rdev.lldi.ports[0],
2269 (const u32 *)
2270 &sin6->sin6_addr.s6_addr, 1);
2271 }
793dad94
VP		 2272 remove_handle(ep->com.dev, &ep->com.dev->atid_idr,
2273 atid);
2274 cxgb4_free_atid(t, atid);
2275 dst_release(ep->dst);
2276 cxgb4_l2t_release(ep->l2t);
2277 c4iw_reconnect(ep);
2278 return 0;
2279 }
5be78ee9 2280 break;
d716a2a0 2281 default:
830662f6
VP		 2282 if (ep->com.local_addr.ss_family == AF_INET) {
2283 pr_info("Active open failure - atid %u status %u errno %d %pI4:%u->%pI4:%u\n",
2284 atid, status, status2errno(status),
2285 &la->sin_addr.s_addr, ntohs(la->sin_port),
2286 &ra->sin_addr.s_addr, ntohs(ra->sin_port));
2287 } else {
2288 pr_info("Active open failure - atid %u status %u errno %d %pI6:%u->%pI6:%u\n",
2289 atid, status, status2errno(status),
2290 la6->sin6_addr.s6_addr, ntohs(la6->sin6_port),
2291 ra6->sin6_addr.s6_addr, ntohs(ra6->sin6_port));
2292 }
d716a2a0
VP		 2293 break;
2294 }
2295
caa6c9f2 2296fail:
cfdda9d7
SW		 2297 connect_reply_upcall(ep, status2errno(status));
2298 state_set(&ep->com, DEAD);
2299
84cc6ac6
H		 2300 if (ep->com.remote_addr.ss_family == AF_INET6) {
2301 struct sockaddr_in6 *sin6 =
170003c8 2302 (struct sockaddr_in6 *)&ep->com.local_addr;
84cc6ac6
H		 2303 cxgb4_clip_release(ep->com.dev->rdev.lldi.ports[0],
2304 (const u32 *)&sin6->sin6_addr.s6_addr, 1);
2305 }
cfdda9d7
SW		 2306 if (status && act_open_has_tid(status))
2307 cxgb4_remove_tid(ep->com.dev->rdev.lldi.tids, 0, GET_TID(rpl));
2308
793dad94 2309 remove_handle(ep->com.dev, &ep->com.dev->atid_idr, atid);
cfdda9d7
SW		 2310 cxgb4_free_atid(t, atid);
2311 dst_release(ep->dst);
2312 cxgb4_l2t_release(ep->l2t);
2313 c4iw_put_ep(&ep->com);
2314
2315 return 0;
2316}
2317
2318static int pass_open_rpl(struct c4iw_dev *dev, struct sk_buff *skb)
2319{
2320 struct cpl_pass_open_rpl *rpl = cplhdr(skb);
cfdda9d7 2321 unsigned int stid = GET_TID(rpl);
f86fac79 2322 struct c4iw_listen_ep *ep = get_ep_from_stid(dev, stid);
cfdda9d7
SW		 2323
2324 if (!ep) {
a9a42886 2325 pr_debug("%s stid %d lookup failure!\n", __func__, stid);
1cab775c 2326 goto out;
cfdda9d7 2327 }
a9a42886
JP		 2328 pr_debug("%s ep %p status %d error %d\n", __func__, ep,
2329 rpl->status, status2errno(rpl->status));
d9594d99 2330 c4iw_wake_up(&ep->com.wr_wait, status2errno(rpl->status));
f86fac79 2331 c4iw_put_ep(&ep->com);
1cab775c 2332out:
cfdda9d7
SW		 2333 return 0;
2334}
2335
cfdda9d7
SW		 2336static int close_listsrv_rpl(struct c4iw_dev *dev, struct sk_buff *skb)
2337{
2338 struct cpl_close_listsvr_rpl *rpl = cplhdr(skb);
cfdda9d7 2339 unsigned int stid = GET_TID(rpl);
f86fac79 2340 struct c4iw_listen_ep *ep = get_ep_from_stid(dev, stid);
cfdda9d7 2341
a9a42886 2342 pr_debug("%s ep %p\n", __func__, ep);
d9594d99 2343 c4iw_wake_up(&ep->com.wr_wait, status2errno(rpl->status));
f86fac79 2344 c4iw_put_ep(&ep->com);
cfdda9d7
SW		 2345 return 0;
2346}
2347
9dec900c
H		 2348static int accept_cr(struct c4iw_ep *ep, struct sk_buff *skb,
2349 struct cpl_pass_accept_req *req)
cfdda9d7
SW		 2350{
2351 struct cpl_pass_accept_rpl *rpl;
2352 unsigned int mtu_idx;
2353 u64 opt0;
2354 u32 opt2;
cc516700 2355 u32 wscale;
92e7ae71 2356 struct cpl_t5_pass_accept_rpl *rpl5 = NULL;
b408ff28 2357 int win;
963cab50 2358 enum chip_type adapter_type = ep->com.dev->rdev.lldi.adapter_type;
cfdda9d7 2359
a9a42886 2360 pr_debug("%s ep %p tid %u\n", __func__, ep, ep->hwtid);
cfdda9d7 2361 BUG_ON(skb_cloned(skb));
92e7ae71 2362
cfdda9d7 2363 skb_get(skb);
92e7ae71 2364 rpl = cplhdr(skb);
963cab50 2365 if (!is_t4(adapter_type)) {
92e7ae71
HS		 2366 skb_trim(skb, roundup(sizeof(*rpl5), 16));
2367 rpl5 = (void *)rpl;
2368 INIT_TP_WR(rpl5, ep->hwtid);
2369 } else {
2370 skb_trim(skb, sizeof(*rpl));
2371 INIT_TP_WR(rpl, ep->hwtid);
2372 }
2373 OPCODE_TID(rpl) = cpu_to_be32(MK_OPCODE_TID(CPL_PASS_ACCEPT_RPL,
2374 ep->hwtid));
2375
44c6d069
VP		 2376 cxgb_best_mtu(ep->com.dev->rdev.lldi.mtus, ep->mtu, &mtu_idx,
2377 enable_tcp_timestamps && req->tcpopt.tstamp,
2378 (ep->com.remote_addr.ss_family == AF_INET) ? 0 : 1);
cc516700 2379 wscale = cxgb_compute_wscale(rcv_win);
b408ff28
HS		 2380
2381 /*
2382 * Specify the largest window that will fit in opt0. The
2383 * remainder will be specified in the rx_data_ack.
2384 */
2385 win = ep->rcv_win >> 10;
d7990b0c
AB		 2386 if (win > RCV_BUFSIZ_M)
2387 win = RCV_BUFSIZ_M;
6c53e938 2388 opt0 = (nocong ? NO_CONG_F : 0) |
d7990b0c 2389 KEEP_ALIVE_F |
6c53e938 2390 DELACK_F |
d7990b0c
AB		 2391 WND_SCALE_V(wscale) |
2392 MSS_IDX_V(mtu_idx) |
2393 L2T_IDX_V(ep->l2t->idx) |
2394 TX_CHAN_V(ep->tx_chan) |
2395 SMAC_SEL_V(ep->smac_idx) |
6c53e938 2396 DSCP_V(ep->tos >> 2) |
d7990b0c
AB		 2397 ULP_MODE_V(ULP_MODE_TCPDDP) |
2398 RCV_BUFSIZ_V(win);
2399 opt2 = RX_CHANNEL_V(0) |
2400 RSS_QUEUE_VALID_F | RSS_QUEUE_V(ep->rss_qid);
cfdda9d7
SW		 2401
2402 if (enable_tcp_timestamps && req->tcpopt.tstamp)
6c53e938 2403 opt2 |= TSTAMPS_EN_F;
cfdda9d7 2404 if (enable_tcp_sack && req->tcpopt.sack)
6c53e938 2405 opt2 |= SACK_EN_F;
cfdda9d7 2406 if (wscale && enable_tcp_window_scaling)
d7990b0c 2407 opt2 |= WND_SCALE_EN_F;
5be78ee9
VP		 2408 if (enable_ecn) {
2409 const struct tcphdr *tcph;
2410 u32 hlen = ntohl(req->hdr_len);
2411
963cab50
H		 2412 if (CHELSIO_CHIP_VERSION(adapter_type) <= CHELSIO_T5)
2413 tcph = (const void *)(req + 1) + ETH_HDR_LEN_G(hlen) +
2414 IP_HDR_LEN_G(hlen);
2415 else
2416 tcph = (const void *)(req + 1) +
2417 T6_ETH_HDR_LEN_G(hlen) + T6_IP_HDR_LEN_G(hlen);
5be78ee9 2418 if (tcph->ece && tcph->cwr)
6c53e938 2419 opt2 |= CCTRL_ECN_V(1);
5be78ee9 2420 }
963cab50 2421 if (CHELSIO_CHIP_VERSION(adapter_type) > CHELSIO_T4) {
92e7ae71 2422 u32 isn = (prandom_u32() & ~7UL) - 1;
d7990b0c 2423 opt2 |= T5_OPT_2_VALID_F;
cf7fe64a 2424 opt2 |= CONG_CNTRL_V(CONG_ALG_TAHOE);
0b741047 2425 opt2 |= T5_ISS_F;
92e7ae71
HS		 2426 rpl5 = (void *)rpl;
2427 memset(&rpl5->iss, 0, roundup(sizeof(*rpl5)-sizeof(*rpl), 16));
2428 if (peer2peer)
2429 isn += 4;
2430 rpl5->iss = cpu_to_be32(isn);
a9a42886 2431 pr_debug("%s iss %u\n", __func__, be32_to_cpu(rpl5->iss));
92e5011a 2432 }
cfdda9d7 2433
cfdda9d7
SW		 2434 rpl->opt0 = cpu_to_be64(opt0);
2435 rpl->opt2 = cpu_to_be32(opt2);
d4f1a5c6 2436 set_wr_txq(skb, CPL_PRIORITY_SETUP, ep->ctrlq_idx);
9dec900c 2437 t4_set_arp_err_handler(skb, ep, pass_accept_rpl_arp_failure);
cfdda9d7 2438
9dec900c 2439 return c4iw_l2t_send(&ep->com.dev->rdev, skb, ep->l2t);
cfdda9d7
SW		 2440}
2441
830662f6 2442static void reject_cr(struct c4iw_dev *dev, u32 hwtid, struct sk_buff *skb)
cfdda9d7 2443{
a9a42886 2444 pr_debug("%s c4iw_dev %p tid %u\n", __func__, dev, hwtid);
cfdda9d7
SW		 2445 BUG_ON(skb_cloned(skb));
2446 skb_trim(skb, sizeof(struct cpl_tid_release));
cfdda9d7
SW		 2447 release_tid(&dev->rdev, hwtid, skb);
2448 return;
2449}
2450
cfdda9d7
SW		 2451static int pass_accept_req(struct c4iw_dev *dev, struct sk_buff *skb)
2452{
793dad94 2453 struct c4iw_ep *child_ep = NULL, *parent_ep;
cfdda9d7 2454 struct cpl_pass_accept_req *req = cplhdr(skb);
6c53e938 2455 unsigned int stid = PASS_OPEN_TID_G(ntohl(req->tos_stid));
cfdda9d7
SW		 2456 struct tid_info *t = dev->rdev.lldi.tids;
2457 unsigned int hwtid = GET_TID(req);
2458 struct dst_entry *dst;
830662f6 2459 __u8 local_ip[16], peer_ip[16];
cfdda9d7 2460 __be16 local_port, peer_port;
84cc6ac6 2461 struct sockaddr_in6 *sin6;
3786cf18 2462 int err;
1cab775c 2463 u16 peer_mss = ntohs(req->tcpopt.mss);
830662f6 2464 int iptype;
92e7ae71 2465 unsigned short hdrs;
ac8e4c69 2466 u8 tos = PASS_OPEN_TOS_G(ntohl(req->tos_stid));
cfdda9d7 2467
f86fac79 2468 parent_ep = (struct c4iw_ep *)get_ep_from_stid(dev, stid);
1cab775c 2469 if (!parent_ep) {
a9a42886
JP		 2470 pr_debug("%s connect request on invalid stid %d\n",
2471 __func__, stid);
1cab775c
VP		 2472 goto reject;
2473 }
1cab775c 2474
cfdda9d7 2475 if (state_read(&parent_ep->com) != LISTEN) {
a9a42886 2476 pr_debug("%s - listening ep not in LISTEN\n", __func__);
cfdda9d7
SW		 2477 goto reject;
2478 }
2479
85e42b04
VP		 2480 cxgb_get_4tuple(req, parent_ep->com.dev->rdev.lldi.adapter_type,
2481 &iptype, local_ip, peer_ip, &local_port, &peer_port);
830662f6 2482
cfdda9d7 2483 /* Find output route */
830662f6 2484 if (iptype == 4) {
a9a42886
JP		 2485 pr_debug("%s parent ep %p hwtid %u laddr %pI4 raddr %pI4 lport %d rport %d peer_mss %d\n"
2486 , __func__, parent_ep, hwtid,
2487 local_ip, peer_ip, ntohs(local_port),
2488 ntohs(peer_port), peer_mss);
804c2f3e
VP		 2489 dst = cxgb_find_route(&dev->rdev.lldi, get_real_dev,
2490 *(__be32 *)local_ip, *(__be32 *)peer_ip,
2491 local_port, peer_port, tos);
830662f6 2492 } else {
a9a42886
JP		 2493 pr_debug("%s parent ep %p hwtid %u laddr %pI6 raddr %pI6 lport %d rport %d peer_mss %d\n"
2494 , __func__, parent_ep, hwtid,
2495 local_ip, peer_ip, ntohs(local_port),
2496 ntohs(peer_port), peer_mss);
95554761
VP		 2497 dst = cxgb_find_route6(&dev->rdev.lldi, get_real_dev,
2498 local_ip, peer_ip, local_port, peer_port,
2499 PASS_OPEN_TOS_G(ntohl(req->tos_stid)),
2500 ((struct sockaddr_in6 *)
2501 &parent_ep->com.local_addr)->sin6_scope_id);
830662f6
VP		 2502 }
2503 if (!dst) {
700456bd 2504 pr_err("%s - failed to find dst entry!\n", __func__);
cfdda9d7
SW		 2505 goto reject;
2506 }
3786cf18
DM		 2507
2508 child_ep = alloc_ep(sizeof(*child_ep), GFP_KERNEL);
2509 if (!child_ep) {
700456bd 2510 pr_err("%s - failed to allocate ep entry!\n", __func__);
cfdda9d7
SW		 2511 dst_release(dst);
2512 goto reject;
2513 }
2514
963cab50 2515 err = import_ep(child_ep, iptype, peer_ip, dst, dev, false,
ac8e4c69 2516 parent_ep->com.dev->rdev.lldi.adapter_type, tos);
3786cf18 2517 if (err) {
700456bd 2518 pr_err("%s - failed to allocate l2t entry!\n", __func__);
cfdda9d7 2519 dst_release(dst);
3786cf18 2520 kfree(child_ep);
cfdda9d7
SW		 2521 goto reject;
2522 }
3786cf18 2523
98b80a2a
RR		 2524 hdrs = ((iptype == 4) ? sizeof(struct iphdr) : sizeof(struct ipv6hdr)) +
2525 sizeof(struct tcphdr) +
92e7ae71
HS		 2526 ((enable_tcp_timestamps && req->tcpopt.tstamp) ? 12 : 0);
2527 if (peer_mss && child_ep->mtu > (peer_mss + hdrs))
2528 child_ep->mtu = peer_mss + hdrs;
1cab775c 2529
4a740838
H		 2530 skb_queue_head_init(&child_ep->com.ep_skb_list);
2531 if (alloc_ep_skb_list(&child_ep->com.ep_skb_list, CN_MAX_CON_BUF))
2532 goto fail;
2533
cfdda9d7
SW		 2534 state_set(&child_ep->com, CONNECTING);
2535 child_ep->com.dev = dev;
2536 child_ep->com.cm_id = NULL;
5b6b8fe6 2537
830662f6
VP		 2538 if (iptype == 4) {
2539 struct sockaddr_in *sin = (struct sockaddr_in *)
170003c8 2540 &child_ep->com.local_addr;
5b6b8fe6 2541
b462b06e 2542 sin->sin_family = AF_INET;
830662f6
VP		 2543 sin->sin_port = local_port;
2544 sin->sin_addr.s_addr = *(__be32 *)local_ip;
5b6b8fe6
SW		 2545
2546 sin = (struct sockaddr_in *)&child_ep->com.local_addr;
b462b06e 2547 sin->sin_family = AF_INET;
5b6b8fe6
SW		 2548 sin->sin_port = ((struct sockaddr_in *)
2549 &parent_ep->com.local_addr)->sin_port;
2550 sin->sin_addr.s_addr = *(__be32 *)local_ip;
2551
170003c8 2552 sin = (struct sockaddr_in *)&child_ep->com.remote_addr;
b462b06e 2553 sin->sin_family = AF_INET;
830662f6
VP		 2554 sin->sin_port = peer_port;
2555 sin->sin_addr.s_addr = *(__be32 *)peer_ip;
2556 } else {
170003c8 2557 sin6 = (struct sockaddr_in6 *)&child_ep->com.local_addr;
830662f6
VP		 2558 sin6->sin6_family = PF_INET6;
2559 sin6->sin6_port = local_port;
2560 memcpy(sin6->sin6_addr.s6_addr, local_ip, 16);
5b6b8fe6
SW		 2561
2562 sin6 = (struct sockaddr_in6 *)&child_ep->com.local_addr;
2563 sin6->sin6_family = PF_INET6;
2564 sin6->sin6_port = ((struct sockaddr_in6 *)
2565 &parent_ep->com.local_addr)->sin6_port;
2566 memcpy(sin6->sin6_addr.s6_addr, local_ip, 16);
2567
170003c8 2568 sin6 = (struct sockaddr_in6 *)&child_ep->com.remote_addr;
830662f6
VP		 2569 sin6->sin6_family = PF_INET6;
2570 sin6->sin6_port = peer_port;
2571 memcpy(sin6->sin6_addr.s6_addr, peer_ip, 16);
2572 }
5b6b8fe6 2573
cfdda9d7
SW		 2574 c4iw_get_ep(&parent_ep->com);
2575 child_ep->parent_ep = parent_ep;
ac8e4c69 2576 child_ep->tos = tos;
cfdda9d7
SW		 2577 child_ep->dst = dst;
2578 child_ep->hwtid = hwtid;
cfdda9d7 2579
a9a42886
JP		 2580 pr_debug("%s tx_chan %u smac_idx %u rss_qid %u\n", __func__,
2581 child_ep->tx_chan, child_ep->smac_idx, child_ep->rss_qid);
cfdda9d7
SW		 2582
2583 init_timer(&child_ep->timer);
2584 cxgb4_insert_tid(t, child_ep, hwtid);
944661dd 2585 insert_ep_tid(child_ep);
9dec900c
H		 2586 if (accept_cr(child_ep, skb, req)) {
2587 c4iw_put_ep(&parent_ep->com);
2588 release_ep_resources(child_ep);
2589 } else {
2590 set_bit(PASS_ACCEPT_REQ, &child_ep->com.history);
2591 }
84cc6ac6 2592 if (iptype == 6) {
170003c8 2593 sin6 = (struct sockaddr_in6 *)&child_ep->com.local_addr;
84cc6ac6
H		 2594 cxgb4_clip_get(child_ep->com.dev->rdev.lldi.ports[0],
2595 (const u32 *)&sin6->sin6_addr.s6_addr, 1);
2596 }
cfdda9d7 2597 goto out;
4a740838
H		 2598fail:
2599 c4iw_put_ep(&child_ep->com);
cfdda9d7 2600reject:
830662f6 2601 reject_cr(dev, hwtid, skb);
f86fac79
H		 2602 if (parent_ep)
2603 c4iw_put_ep(&parent_ep->com);
cfdda9d7
SW		 2604out:
2605 return 0;
2606}
2607
2608static int pass_establish(struct c4iw_dev *dev, struct sk_buff *skb)
2609{
2610 struct c4iw_ep *ep;
2611 struct cpl_pass_establish *req = cplhdr(skb);
cfdda9d7 2612 unsigned int tid = GET_TID(req);
fef4422d 2613 int ret;
cfdda9d7 2614
944661dd 2615 ep = get_ep_from_tid(dev, tid);
a9a42886 2616 pr_debug("%s ep %p tid %u\n", __func__, ep, ep->hwtid);
cfdda9d7
SW		 2617 ep->snd_seq = be32_to_cpu(req->snd_isn);
2618 ep->rcv_seq = be32_to_cpu(req->rcv_isn);
2619
a9a42886
JP		 2620 pr_debug("%s ep %p hwtid %u tcp_opt 0x%02x\n", __func__, ep, tid,
2621 ntohs(req->tcp_opt));
1cab775c 2622
cfdda9d7
SW		 2623 set_emss(ep, ntohs(req->tcp_opt));
2624
2625 dst_confirm(ep->dst);
fef4422d
H		 2626 mutex_lock(&ep->com.mutex);
2627 ep->com.state = MPA_REQ_WAIT;
cfdda9d7 2628 start_ep_timer(ep);
793dad94 2629 set_bit(PASS_ESTAB, &ep->com.history);
4a740838 2630 ret = send_flowc(ep);
fef4422d
H		 2631 mutex_unlock(&ep->com.mutex);
2632 if (ret)
2633 c4iw_ep_disconnect(ep, 1, GFP_KERNEL);
944661dd 2634 c4iw_put_ep(&ep->com);
cfdda9d7
SW		 2635
2636 return 0;
2637}
2638
2639static int peer_close(struct c4iw_dev *dev, struct sk_buff *skb)
2640{
2641 struct cpl_peer_close *hdr = cplhdr(skb);
2642 struct c4iw_ep *ep;
2643 struct c4iw_qp_attributes attrs;
cfdda9d7
SW		 2644 int disconnect = 1;
2645 int release = 0;
cfdda9d7 2646 unsigned int tid = GET_TID(hdr);
8da7e7a5 2647 int ret;
cfdda9d7 2648
944661dd
H		 2649 ep = get_ep_from_tid(dev, tid);
2650 if (!ep)
2651 return 0;
2652
a9a42886 2653 pr_debug("%s ep %p tid %u\n", __func__, ep, ep->hwtid);
cfdda9d7
SW		 2654 dst_confirm(ep->dst);
2655
793dad94 2656 set_bit(PEER_CLOSE, &ep->com.history);
2f5b48c3 2657 mutex_lock(&ep->com.mutex);
cfdda9d7
SW		 2658 switch (ep->com.state) {
2659 case MPA_REQ_WAIT:
2660 __state_set(&ep->com, CLOSING);
2661 break;
2662 case MPA_REQ_SENT:
2663 __state_set(&ep->com, CLOSING);
2664 connect_reply_upcall(ep, -ECONNRESET);
2665 break;
2666 case MPA_REQ_RCVD:
2667
2668 /*
2669 * We're gonna mark this puppy DEAD, but keep
2670 * the reference on it until the ULP accepts or
2671 * rejects the CR. Also wake up anyone waiting
2672 * in rdma connection migration (see c4iw_accept_cr()).
2673 */
2674 __state_set(&ep->com, CLOSING);
a9a42886 2675 pr_debug("waking up ep %p tid %u\n", ep, ep->hwtid);
d9594d99 2676 c4iw_wake_up(&ep->com.wr_wait, -ECONNRESET);
cfdda9d7
SW		 2677 break;
2678 case MPA_REP_SENT:
2679 __state_set(&ep->com, CLOSING);
a9a42886 2680 pr_debug("waking up ep %p tid %u\n", ep, ep->hwtid);
d9594d99 2681 c4iw_wake_up(&ep->com.wr_wait, -ECONNRESET);
cfdda9d7
SW		 2682 break;
2683 case FPDU_MODE:
ca5a2202 2684 start_ep_timer(ep);
cfdda9d7 2685 __state_set(&ep->com, CLOSING);
30c95c2d 2686 attrs.next_state = C4IW_QP_STATE_CLOSING;
8da7e7a5 2687 ret = c4iw_modify_qp(ep->com.qp->rhp, ep->com.qp,
30c95c2d 2688 C4IW_QP_ATTR_NEXT_STATE, &attrs, 1);
8da7e7a5
SW		 2689 if (ret != -ECONNRESET) {
2690 peer_close_upcall(ep);
2691 disconnect = 1;
2692 }
cfdda9d7
SW		 2693 break;
2694 case ABORTING:
2695 disconnect = 0;
2696 break;
2697 case CLOSING:
2698 __state_set(&ep->com, MORIBUND);
2699 disconnect = 0;
2700 break;
2701 case MORIBUND:
b33bd0cb 2702 (void)stop_ep_timer(ep);
cfdda9d7
SW		 2703 if (ep->com.cm_id && ep->com.qp) {
2704 attrs.next_state = C4IW_QP_STATE_IDLE;
2705 c4iw_modify_qp(ep->com.qp->rhp, ep->com.qp,
2706 C4IW_QP_ATTR_NEXT_STATE, &attrs, 1);
2707 }
be13b2df 2708 close_complete_upcall(ep, 0);
cfdda9d7
SW		 2709 __state_set(&ep->com, DEAD);
2710 release = 1;
2711 disconnect = 0;
2712 break;
2713 case DEAD:
2714 disconnect = 0;
2715 break;
2716 default:
2717 BUG_ON(1);
2718 }
2f5b48c3 2719 mutex_unlock(&ep->com.mutex);
cfdda9d7
SW		 2720 if (disconnect)
2721 c4iw_ep_disconnect(ep, 0, GFP_KERNEL);
2722 if (release)
2723 release_ep_resources(ep);
944661dd 2724 c4iw_put_ep(&ep->com);
cfdda9d7
SW		 2725 return 0;
2726}
2727
cfdda9d7
SW		 2728static int peer_abort(struct c4iw_dev *dev, struct sk_buff *skb)
2729{
2730 struct cpl_abort_req_rss *req = cplhdr(skb);
2731 struct c4iw_ep *ep;
cfdda9d7
SW		 2732 struct sk_buff *rpl_skb;
2733 struct c4iw_qp_attributes attrs;
2734 int ret;
2735 int release = 0;
cfdda9d7 2736 unsigned int tid = GET_TID(req);
052f4731 2737 u32 len = roundup(sizeof(struct cpl_abort_rpl), 16);
cfdda9d7 2738
944661dd
H		 2739 ep = get_ep_from_tid(dev, tid);
2740 if (!ep)
2741 return 0;
2742
b65eef0a 2743 if (cxgb_is_neg_adv(req->status)) {
a9a42886
JP		 2744 pr_debug("%s Negative advice on abort- tid %u status %d (%s)\n",
2745 __func__, ep->hwtid, req->status,
2746 neg_adv_str(req->status));
179d03bb
H		 2747 ep->stats.abort_neg_adv++;
2748 mutex_lock(&dev->rdev.stats.lock);
2749 dev->rdev.stats.neg_adv++;
2750 mutex_unlock(&dev->rdev.stats.lock);
944661dd 2751 goto deref_ep;
cfdda9d7 2752 }
a9a42886
JP		 2753 pr_debug("%s ep %p tid %u state %u\n", __func__, ep, ep->hwtid,
2754 ep->com.state);
793dad94 2755 set_bit(PEER_ABORT, &ep->com.history);
2f5b48c3
SW		 2756
2757 /*
2758 * Wake up any threads in rdma_init() or rdma_fini().
d2fe99e8
KS		 2759 * However, this is not needed if com state is just
2760 * MPA_REQ_SENT
2f5b48c3 2761 */
d2fe99e8
KS		 2762 if (ep->com.state != MPA_REQ_SENT)
2763 c4iw_wake_up(&ep->com.wr_wait, -ECONNRESET);
2f5b48c3
SW		 2764
2765 mutex_lock(&ep->com.mutex);
cfdda9d7
SW		 2766 switch (ep->com.state) {
2767 case CONNECTING:
9dec900c 2768 c4iw_put_ep(&ep->parent_ep->com);
cfdda9d7
SW		 2769 break;
2770 case MPA_REQ_WAIT:
b33bd0cb 2771 (void)stop_ep_timer(ep);
cfdda9d7
SW		 2772 break;
2773 case MPA_REQ_SENT:
b33bd0cb 2774 (void)stop_ep_timer(ep);
fe7e0a4d 2775 if (mpa_rev == 1 || (mpa_rev == 2 && ep->tried_with_mpa_v1))
d2fe99e8
KS		 2776 connect_reply_upcall(ep, -ECONNRESET);
2777 else {
2778 /*
2779 * we just don't send notification upwards because we
2780 * want to retry with mpa_v1 without upper layers even
2781 * knowing it.
2782 *
2783 * do some housekeeping so as to re-initiate the
2784 * connection
2785 */
a9a42886
JP		 2786 pr_debug("%s: mpa_rev=%d. Retrying with mpav1\n",
2787 __func__, mpa_rev);
d2fe99e8
KS		 2788 ep->retry_with_mpa_v1 = 1;
2789 }
cfdda9d7
SW		 2790 break;
2791 case MPA_REP_SENT:
cfdda9d7
SW		 2792 break;
2793 case MPA_REQ_RCVD:
cfdda9d7
SW		 2794 break;
2795 case MORIBUND:
2796 case CLOSING:
ca5a2202 2797 stop_ep_timer(ep);
cfdda9d7
SW		 2798 /*FALLTHROUGH*/
2799 case FPDU_MODE:
2800 if (ep->com.cm_id && ep->com.qp) {
2801 attrs.next_state = C4IW_QP_STATE_ERROR;
2802 ret = c4iw_modify_qp(ep->com.qp->rhp,
2803 ep->com.qp, C4IW_QP_ATTR_NEXT_STATE,
2804 &attrs, 1);
2805 if (ret)
700456bd 2806 pr_err("%s - qp <- error failed!\n", __func__);
cfdda9d7
SW		 2807 }
2808 peer_abort_upcall(ep);
2809 break;
2810 case ABORTING:
2811 break;
2812 case DEAD:
a9a42886 2813 pr_debug("%s PEER_ABORT IN DEAD STATE!!!!\n", __func__);
2f5b48c3 2814 mutex_unlock(&ep->com.mutex);
944661dd 2815 goto deref_ep;
cfdda9d7
SW		 2816 default:
2817 BUG_ON(1);
2818 break;
2819 }
2820 dst_confirm(ep->dst);
2821 if (ep->com.state != ABORTING) {
2822 __state_set(&ep->com, DEAD);
d2fe99e8
KS		 2823 /* we don't release if we want to retry with mpa_v1 */
2824 if (!ep->retry_with_mpa_v1)
2825 release = 1;
cfdda9d7 2826 }
2f5b48c3 2827 mutex_unlock(&ep->com.mutex);
cfdda9d7 2828
4a740838
H		 2829 rpl_skb = skb_dequeue(&ep->com.ep_skb_list);
2830 if (WARN_ON(!rpl_skb)) {
cfdda9d7
SW		 2831 release = 1;
2832 goto out;
2833 }
052f4731
VP		 2834
2835 cxgb_mk_abort_rpl(rpl_skb, len, ep->hwtid, ep->txq_idx);
2836
cfdda9d7
SW		 2837 c4iw_ofld_send(&ep->com.dev->rdev, rpl_skb);
2838out:
cfdda9d7
SW		 2839 if (release)
2840 release_ep_resources(ep);
fe7e0a4d 2841 else if (ep->retry_with_mpa_v1) {
84cc6ac6
H		 2842 if (ep->com.remote_addr.ss_family == AF_INET6) {
2843 struct sockaddr_in6 *sin6 =
2844 (struct sockaddr_in6 *)
170003c8 2845 &ep->com.local_addr;
84cc6ac6
H		 2846 cxgb4_clip_release(
2847 ep->com.dev->rdev.lldi.ports[0],
2848 (const u32 *)&sin6->sin6_addr.s6_addr,
2849 1);
2850 }
fe7e0a4d 2851 remove_handle(ep->com.dev, &ep->com.dev->hwtid_idr, ep->hwtid);
d2fe99e8
KS		 2852 cxgb4_remove_tid(ep->com.dev->rdev.lldi.tids, 0, ep->hwtid);
2853 dst_release(ep->dst);
2854 cxgb4_l2t_release(ep->l2t);
2855 c4iw_reconnect(ep);
2856 }
2857
944661dd
H		 2858deref_ep:
2859 c4iw_put_ep(&ep->com);
2860 /* Dereferencing ep, referenced in peer_abort_intr() */
2861 c4iw_put_ep(&ep->com);
cfdda9d7
SW		 2862 return 0;
2863}
2864
2865static int close_con_rpl(struct c4iw_dev *dev, struct sk_buff *skb)
2866{
2867 struct c4iw_ep *ep;
2868 struct c4iw_qp_attributes attrs;
2869 struct cpl_close_con_rpl *rpl = cplhdr(skb);
cfdda9d7 2870 int release = 0;
cfdda9d7 2871 unsigned int tid = GET_TID(rpl);
cfdda9d7 2872
944661dd
H		 2873 ep = get_ep_from_tid(dev, tid);
2874 if (!ep)
2875 return 0;
cfdda9d7 2876
a9a42886 2877 pr_debug("%s ep %p tid %u\n", __func__, ep, ep->hwtid);
cfdda9d7
SW		 2878 BUG_ON(!ep);
2879
2880 /* The cm_id may be null if we failed to connect */
2f5b48c3 2881 mutex_lock(&ep->com.mutex);
9ca6f7cf 2882 set_bit(CLOSE_CON_RPL, &ep->com.history);
cfdda9d7
SW		 2883 switch (ep->com.state) {
2884 case CLOSING:
2885 __state_set(&ep->com, MORIBUND);
2886 break;
2887 case MORIBUND:
b33bd0cb 2888 (void)stop_ep_timer(ep);
cfdda9d7
SW		 2889 if ((ep->com.cm_id) && (ep->com.qp)) {
2890 attrs.next_state = C4IW_QP_STATE_IDLE;
2891 c4iw_modify_qp(ep->com.qp->rhp,
2892 ep->com.qp,
2893 C4IW_QP_ATTR_NEXT_STATE,
2894 &attrs, 1);
2895 }
be13b2df 2896 close_complete_upcall(ep, 0);
cfdda9d7
SW		 2897 __state_set(&ep->com, DEAD);
2898 release = 1;
2899 break;
2900 case ABORTING:
2901 case DEAD:
2902 break;
2903 default:
2904 BUG_ON(1);
2905 break;
2906 }
2f5b48c3 2907 mutex_unlock(&ep->com.mutex);
cfdda9d7
SW		 2908 if (release)
2909 release_ep_resources(ep);
944661dd 2910 c4iw_put_ep(&ep->com);
cfdda9d7
SW		 2911 return 0;
2912}
2913
2914static int terminate(struct c4iw_dev *dev, struct sk_buff *skb)
2915{
0e42c1f4 2916 struct cpl_rdma_terminate *rpl = cplhdr(skb);
0e42c1f4
SW		 2917 unsigned int tid = GET_TID(rpl);
2918 struct c4iw_ep *ep;
2919 struct c4iw_qp_attributes attrs;
cfdda9d7 2920
944661dd 2921 ep = get_ep_from_tid(dev, tid);
0e42c1f4 2922 BUG_ON(!ep);
cfdda9d7 2923
30c95c2d 2924 if (ep && ep->com.qp) {
700456bd
JP		 2925 pr_warn("TERM received tid %u qpid %u\n",
2926 tid, ep->com.qp->wq.sq.qid);
0e42c1f4
SW		 2927 attrs.next_state = C4IW_QP_STATE_TERMINATE;
2928 c4iw_modify_qp(ep->com.qp->rhp, ep->com.qp,
2929 C4IW_QP_ATTR_NEXT_STATE, &attrs, 1);
2930 } else
700456bd 2931 pr_warn("TERM received tid %u no ep/qp\n", tid);
944661dd 2932 c4iw_put_ep(&ep->com);
cfdda9d7 2933
cfdda9d7
SW		 2934 return 0;
2935}
2936
2937/*
2938 * Upcall from the adapter indicating data has been transmitted.
2939 * For us its just the single MPA request or reply. We can now free
2940 * the skb holding the mpa message.
2941 */
2942static int fw4_ack(struct c4iw_dev *dev, struct sk_buff *skb)
2943{
2944 struct c4iw_ep *ep;
2945 struct cpl_fw4_ack *hdr = cplhdr(skb);
2946 u8 credits = hdr->credits;
2947 unsigned int tid = GET_TID(hdr);
cfdda9d7
SW		 2948
2949
944661dd
H		 2950 ep = get_ep_from_tid(dev, tid);
2951 if (!ep)
2952 return 0;
a9a42886
JP		 2953 pr_debug("%s ep %p tid %u credits %u\n",
2954 __func__, ep, ep->hwtid, credits);
cfdda9d7 2955 if (credits == 0) {
a9a42886
JP		 2956 pr_debug("%s 0 credit ack ep %p tid %u state %u\n",
2957 __func__, ep, ep->hwtid, state_read(&ep->com));
944661dd 2958 goto out;
cfdda9d7
SW		 2959 }
2960
2961 dst_confirm(ep->dst);
2962 if (ep->mpa_skb) {
a9a42886
JP		 2963 pr_debug("%s last streaming msg ack ep %p tid %u state %u initiator %u freeing skb\n",
2964 __func__, ep, ep->hwtid,
2965 state_read(&ep->com), ep->mpa_attr.initiator ? 1 : 0);
12eb5137 2966 mutex_lock(&ep->com.mutex);
cfdda9d7
SW		 2967 kfree_skb(ep->mpa_skb);
2968 ep->mpa_skb = NULL;
e4b76a2a
H		 2969 if (test_bit(STOP_MPA_TIMER, &ep->com.flags))
2970 stop_ep_timer(ep);
2971 mutex_unlock(&ep->com.mutex);
cfdda9d7 2972 }
944661dd
H		 2973out:
2974 c4iw_put_ep(&ep->com);
cfdda9d7
SW		 2975 return 0;
2976}
2977
cfdda9d7
SW		 2978int c4iw_reject_cr(struct iw_cm_id *cm_id, const void *pdata, u8 pdata_len)
2979{
bce2841f 2980 int abort;
cfdda9d7 2981 struct c4iw_ep *ep = to_ep(cm_id);
bce2841f 2982
a9a42886 2983 pr_debug("%s ep %p tid %u\n", __func__, ep, ep->hwtid);
cfdda9d7 2984
a7db89eb 2985 mutex_lock(&ep->com.mutex);
e8667a9b 2986 if (ep->com.state != MPA_REQ_RCVD) {
a7db89eb 2987 mutex_unlock(&ep->com.mutex);
cfdda9d7
SW		 2988 c4iw_put_ep(&ep->com);
2989 return -ECONNRESET;
2990 }
793dad94 2991 set_bit(ULP_REJECT, &ep->com.history);
cfdda9d7 2992 if (mpa_rev == 0)
bce2841f
H		 2993 abort = 1;
2994 else
2995 abort = send_mpa_reject(ep, pdata, pdata_len);
a7db89eb 2996 mutex_unlock(&ep->com.mutex);
bce2841f
H		 2997
2998 stop_ep_timer(ep);
2999 c4iw_ep_disconnect(ep, abort != 0, GFP_KERNEL);
cfdda9d7
SW		 3000 c4iw_put_ep(&ep->com);
3001 return 0;
3002}
3003
3004int c4iw_accept_cr(struct iw_cm_id *cm_id, struct iw_cm_conn_param *conn_param)
3005{
3006 int err;
3007 struct c4iw_qp_attributes attrs;
3008 enum c4iw_qp_attr_mask mask;
3009 struct c4iw_ep *ep = to_ep(cm_id);
3010 struct c4iw_dev *h = to_c4iw_dev(cm_id->device);
3011 struct c4iw_qp *qp = get_qhp(h, conn_param->qpn);
eaf4c6d4 3012 int abort = 0;
cfdda9d7 3013
a9a42886 3014 pr_debug("%s ep %p tid %u\n", __func__, ep, ep->hwtid);
a7db89eb
SW		 3015
3016 mutex_lock(&ep->com.mutex);
e8667a9b 3017 if (ep->com.state != MPA_REQ_RCVD) {
cfdda9d7 3018 err = -ECONNRESET;
eaf4c6d4 3019 goto err_out;
cfdda9d7
SW		 3020 }
3021
cfdda9d7
SW		 3022 BUG_ON(!qp);
3023
793dad94 3024 set_bit(ULP_ACCEPT, &ep->com.history);
4c2c5763
HS		 3025 if ((conn_param->ord > cur_max_read_depth(ep->com.dev)) ||
3026 (conn_param->ird > cur_max_read_depth(ep->com.dev))) {
cfdda9d7 3027 err = -EINVAL;
eaf4c6d4 3028 goto err_abort;
cfdda9d7
SW		 3029 }
3030
d2fe99e8
KS		 3031 if (ep->mpa_attr.version == 2 && ep->mpa_attr.enhanced_rdma_conn) {
3032 if (conn_param->ord > ep->ird) {
4c2c5763 3033 if (RELAXED_IRD_NEGOTIATION) {
30b03b15 3034 conn_param->ord = ep->ird;
4c2c5763
HS		 3035 } else {
3036 ep->ird = conn_param->ird;
3037 ep->ord = conn_param->ord;
3038 send_mpa_reject(ep, conn_param->private_data,
3039 conn_param->private_data_len);
4c2c5763 3040 err = -ENOMEM;
eaf4c6d4 3041 goto err_abort;
4c2c5763 3042 }
d2fe99e8 3043 }
4c2c5763
HS		 3044 if (conn_param->ird < ep->ord) {
3045 if (RELAXED_IRD_NEGOTIATION &&
3046 ep->ord <= h->rdev.lldi.max_ordird_qp) {
3047 conn_param->ird = ep->ord;
3048 } else {
d2fe99e8 3049 err = -ENOMEM;
eaf4c6d4 3050 goto err_abort;
d2fe99e8
KS		 3051 }
3052 }
d2fe99e8 3053 }
cfdda9d7
SW		 3054 ep->ird = conn_param->ird;
3055 ep->ord = conn_param->ord;
3056
4c2c5763 3057 if (ep->mpa_attr.version == 1) {
d2fe99e8
KS		 3058 if (peer2peer && ep->ird == 0)
3059 ep->ird = 1;
4c2c5763
HS		 3060 } else {
3061 if (peer2peer &&
3062 (ep->mpa_attr.p2p_type != FW_RI_INIT_P2PTYPE_DISABLED) &&
f57b780c 3063 (p2p_type == FW_RI_INIT_P2PTYPE_READ_REQ) && ep->ird == 0)
4c2c5763
HS		 3064 ep->ird = 1;
3065 }
cfdda9d7 3066
a9a42886 3067 pr_debug("%s %d ird %d ord %d\n", __func__, __LINE__, ep->ird, ep->ord);
cfdda9d7 3068
d2fe99e8 3069 ep->com.cm_id = cm_id;
9ca6f7cf 3070 ref_cm_id(&ep->com);
d2fe99e8 3071 ep->com.qp = qp;
325abead 3072 ref_qp(ep);
d2fe99e8 3073
cfdda9d7
SW		 3074 /* bind QP to EP and move to RTS */
3075 attrs.mpa_attr = ep->mpa_attr;
3076 attrs.max_ird = ep->ird;
3077 attrs.max_ord = ep->ord;
3078 attrs.llp_stream_handle = ep;
3079 attrs.next_state = C4IW_QP_STATE_RTS;
3080
3081 /* bind QP and TID with INIT_WR */
3082 mask = C4IW_QP_ATTR_NEXT_STATE |
3083 C4IW_QP_ATTR_LLP_STREAM_HANDLE |
3084 C4IW_QP_ATTR_MPA_ATTR |
3085 C4IW_QP_ATTR_MAX_IRD |
3086 C4IW_QP_ATTR_MAX_ORD;
3087
3088 err = c4iw_modify_qp(ep->com.qp->rhp,
3089 ep->com.qp, mask, &attrs, 1);
3090 if (err)
eaf4c6d4 3091 goto err_deref_cm_id;
e4b76a2a
H		 3092
3093 set_bit(STOP_MPA_TIMER, &ep->com.flags);
cfdda9d7
SW		 3094 err = send_mpa_reply(ep, conn_param->private_data,
3095 conn_param->private_data_len);
3096 if (err)
eaf4c6d4 3097 goto err_deref_cm_id;
cfdda9d7 3098
a7db89eb 3099 __state_set(&ep->com, FPDU_MODE);
cfdda9d7 3100 established_upcall(ep);
a7db89eb 3101 mutex_unlock(&ep->com.mutex);
cfdda9d7
SW		 3102 c4iw_put_ep(&ep->com);
3103 return 0;
eaf4c6d4 3104err_deref_cm_id:
9ca6f7cf 3105 deref_cm_id(&ep->com);
eaf4c6d4
H		 3106err_abort:
3107 abort = 1;
3108err_out:
a7db89eb 3109 mutex_unlock(&ep->com.mutex);
eaf4c6d4
H		 3110 if (abort)
3111 c4iw_ep_disconnect(ep, 1, GFP_KERNEL);
cfdda9d7
SW		 3112 c4iw_put_ep(&ep->com);
3113 return err;
3114}
3115
830662f6
VP		 3116static int pick_local_ipaddrs(struct c4iw_dev *dev, struct iw_cm_id *cm_id)
3117{
3118 struct in_device *ind;
3119 int found = 0;
170003c8
SW		 3120 struct sockaddr_in *laddr = (struct sockaddr_in *)&cm_id->m_local_addr;
3121 struct sockaddr_in *raddr = (struct sockaddr_in *)&cm_id->m_remote_addr;
830662f6
VP		 3122
3123 ind = in_dev_get(dev->rdev.lldi.ports[0]);
3124 if (!ind)
3125 return -EADDRNOTAVAIL;
3126 for_primary_ifa(ind) {
3127 laddr->sin_addr.s_addr = ifa->ifa_address;
3128 raddr->sin_addr.s_addr = ifa->ifa_address;
3129 found = 1;
3130 break;
3131 }
3132 endfor_ifa(ind);
3133 in_dev_put(ind);
3134 return found ? 0 : -EADDRNOTAVAIL;
3135}
3136
3137static int get_lladdr(struct net_device *dev, struct in6_addr *addr,
3138 unsigned char banned_flags)
3139{
3140 struct inet6_dev *idev;
3141 int err = -EADDRNOTAVAIL;
3142
3143 rcu_read_lock();
3144 idev = __in6_dev_get(dev);
3145 if (idev != NULL) {
3146 struct inet6_ifaddr *ifp;
3147
3148 read_lock_bh(&idev->lock);
3149 list_for_each_entry(ifp, &idev->addr_list, if_list) {
3150 if (ifp->scope == IFA_LINK &&
3151 !(ifp->flags & banned_flags)) {
3152 memcpy(addr, &ifp->addr, 16);
3153 err = 0;
3154 break;
3155 }
3156 }
3157 read_unlock_bh(&idev->lock);
3158 }
3159 rcu_read_unlock();
3160 return err;
3161}
3162
3163static int pick_local_ip6addrs(struct c4iw_dev *dev, struct iw_cm_id *cm_id)
3164{
3165 struct in6_addr uninitialized_var(addr);
170003c8
SW		 3166 struct sockaddr_in6 *la6 = (struct sockaddr_in6 *)&cm_id->m_local_addr;
3167 struct sockaddr_in6 *ra6 = (struct sockaddr_in6 *)&cm_id->m_remote_addr;
830662f6 3168
54b9a96f 3169 if (!get_lladdr(dev->rdev.lldi.ports[0], &addr, IFA_F_TENTATIVE)) {
830662f6
VP		 3170 memcpy(la6->sin6_addr.s6_addr, &addr, 16);
3171 memcpy(ra6->sin6_addr.s6_addr, &addr, 16);
3172 return 0;
3173 }
3174 return -EADDRNOTAVAIL;
3175}
3176
cfdda9d7
SW		 3177int c4iw_connect(struct iw_cm_id *cm_id, struct iw_cm_conn_param *conn_param)
3178{
cfdda9d7
SW		 3179 struct c4iw_dev *dev = to_c4iw_dev(cm_id->device);
3180 struct c4iw_ep *ep;
3786cf18 3181 int err = 0;
9eccfe10
SW		 3182 struct sockaddr_in *laddr;
3183 struct sockaddr_in *raddr;
3184 struct sockaddr_in6 *laddr6;
3185 struct sockaddr_in6 *raddr6;
830662f6
VP		 3186 __u8 *ra;
3187 int iptype;
cfdda9d7 3188
4c2c5763
HS		 3189 if ((conn_param->ord > cur_max_read_depth(dev)) ||
3190 (conn_param->ird > cur_max_read_depth(dev))) {
be4c9bad
RD		 3191 err = -EINVAL;
3192 goto out;
3193 }
cfdda9d7
SW		 3194 ep = alloc_ep(sizeof(*ep), GFP_KERNEL);
3195 if (!ep) {
700456bd 3196 pr_err("%s - cannot alloc ep\n", __func__);
cfdda9d7
SW		 3197 err = -ENOMEM;
3198 goto out;
3199 }
4a740838
H		 3200
3201 skb_queue_head_init(&ep->com.ep_skb_list);
3202 if (alloc_ep_skb_list(&ep->com.ep_skb_list, CN_MAX_CON_BUF)) {
3203 err = -ENOMEM;
3204 goto fail1;
3205 }
3206
cfdda9d7
SW		 3207 init_timer(&ep->timer);
3208 ep->plen = conn_param->private_data_len;
3209 if (ep->plen)
3210 memcpy(ep->mpa_pkt + sizeof(struct mpa_message),
3211 conn_param->private_data, ep->plen);
3212 ep->ird = conn_param->ird;
3213 ep->ord = conn_param->ord;
3214
3215 if (peer2peer && ep->ord == 0)
3216 ep->ord = 1;
3217
cfdda9d7 3218 ep->com.cm_id = cm_id;
9ca6f7cf
H		 3219 ref_cm_id(&ep->com);
3220 ep->com.dev = dev;
cfdda9d7 3221 ep->com.qp = get_qhp(dev, conn_param->qpn);
830662f6 3222 if (!ep->com.qp) {
a9a42886 3223 pr_debug("%s qpn 0x%x not found!\n", __func__, conn_param->qpn);
830662f6 3224 err = -EINVAL;
4a740838 3225 goto fail2;
830662f6 3226 }
325abead 3227 ref_qp(ep);
a9a42886
JP		 3228 pr_debug("%s qpn 0x%x qp %p cm_id %p\n", __func__, conn_param->qpn,
3229 ep->com.qp, cm_id);
cfdda9d7
SW		 3230
3231 /*
3232 * Allocate an active TID to initiate a TCP connection.
3233 */
3234 ep->atid = cxgb4_alloc_atid(dev->rdev.lldi.tids, ep);
3235 if (ep->atid == -1) {
700456bd 3236 pr_err("%s - cannot alloc atid\n", __func__);
cfdda9d7 3237 err = -ENOMEM;
4a740838 3238 goto fail2;
cfdda9d7 3239 }
793dad94 3240 insert_handle(dev, &dev->atid_idr, ep, ep->atid);
cfdda9d7 3241
170003c8 3242 memcpy(&ep->com.local_addr, &cm_id->m_local_addr,
9eccfe10 3243 sizeof(ep->com.local_addr));
170003c8 3244 memcpy(&ep->com.remote_addr, &cm_id->m_remote_addr,
9eccfe10
SW		 3245 sizeof(ep->com.remote_addr));
3246
170003c8
SW		 3247 laddr = (struct sockaddr_in *)&ep->com.local_addr;
3248 raddr = (struct sockaddr_in *)&ep->com.remote_addr;
3249 laddr6 = (struct sockaddr_in6 *)&ep->com.local_addr;
3250 raddr6 = (struct sockaddr_in6 *) &ep->com.remote_addr;
9eccfe10 3251
170003c8 3252 if (cm_id->m_remote_addr.ss_family == AF_INET) {
830662f6
VP		 3253 iptype = 4;
3254 ra = (__u8 *)&raddr->sin_addr;
cfdda9d7 3255
830662f6
VP		 3256 /*
3257 * Handle loopback requests to INADDR_ANY.
3258 */
ba987e51 3259 if (raddr->sin_addr.s_addr == htonl(INADDR_ANY)) {
830662f6
VP		 3260 err = pick_local_ipaddrs(dev, cm_id);
3261 if (err)
4a740838 3262 goto fail2;
830662f6
VP		 3263 }
3264
3265 /* find a route */
a9a42886
JP		 3266 pr_debug("%s saddr %pI4 sport 0x%x raddr %pI4 rport 0x%x\n",
3267 __func__, &laddr->sin_addr, ntohs(laddr->sin_port),
3268 ra, ntohs(raddr->sin_port));
804c2f3e
VP		 3269 ep->dst = cxgb_find_route(&dev->rdev.lldi, get_real_dev,
3270 laddr->sin_addr.s_addr,
3271 raddr->sin_addr.s_addr,
3272 laddr->sin_port,
3273 raddr->sin_port, cm_id->tos);
830662f6
VP		 3274 } else {
3275 iptype = 6;
3276 ra = (__u8 *)&raddr6->sin6_addr;
3277
3278 /*
3279 * Handle loopback requests to INADDR_ANY.
3280 */
3281 if (ipv6_addr_type(&raddr6->sin6_addr) == IPV6_ADDR_ANY) {
3282 err = pick_local_ip6addrs(dev, cm_id);
3283 if (err)
4a740838 3284 goto fail2;
830662f6
VP		 3285 }
3286
3287 /* find a route */
a9a42886
JP		 3288 pr_debug("%s saddr %pI6 sport 0x%x raddr %pI6 rport 0x%x\n",
3289 __func__, laddr6->sin6_addr.s6_addr,
3290 ntohs(laddr6->sin6_port),
3291 raddr6->sin6_addr.s6_addr, ntohs(raddr6->sin6_port));
95554761
VP		 3292 ep->dst = cxgb_find_route6(&dev->rdev.lldi, get_real_dev,
3293 laddr6->sin6_addr.s6_addr,
3294 raddr6->sin6_addr.s6_addr,
3295 laddr6->sin6_port,
3296 raddr6->sin6_port, 0,
3297 raddr6->sin6_scope_id);
830662f6
VP		 3298 }
3299 if (!ep->dst) {
700456bd 3300 pr_err("%s - cannot find route\n", __func__);
cfdda9d7 3301 err = -EHOSTUNREACH;
4a740838 3302 goto fail3;
cfdda9d7 3303 }
cfdda9d7 3304
963cab50 3305 err = import_ep(ep, iptype, ra, ep->dst, ep->com.dev, true,
ac8e4c69 3306 ep->com.dev->rdev.lldi.adapter_type, cm_id->tos);
3786cf18 3307 if (err) {
700456bd 3308 pr_err("%s - cannot alloc l2e\n", __func__);
4a740838 3309 goto fail4;
cfdda9d7
SW		 3310 }
3311
a9a42886
JP		 3312 pr_debug("%s txq_idx %u tx_chan %u smac_idx %u rss_qid %u l2t_idx %u\n",
3313 __func__, ep->txq_idx, ep->tx_chan, ep->smac_idx, ep->rss_qid,
3314 ep->l2t->idx);
cfdda9d7
SW		 3315
3316 state_set(&ep->com, CONNECTING);
ac8e4c69 3317 ep->tos = cm_id->tos;
cfdda9d7
SW		 3318
3319 /* send connect request to rnic */
3320 err = send_connect(ep);
3321 if (!err)
3322 goto out;
3323
3324 cxgb4_l2t_release(ep->l2t);
4a740838 3325fail4:
9eccfe10 3326 dst_release(ep->dst);
4a740838 3327fail3:
793dad94 3328 remove_handle(ep->com.dev, &ep->com.dev->atid_idr, ep->atid);
cfdda9d7 3329 cxgb4_free_atid(ep->com.dev->rdev.lldi.tids, ep->atid);
4a740838
H		 3330fail2:
3331 skb_queue_purge(&ep->com.ep_skb_list);
9ca6f7cf 3332 deref_cm_id(&ep->com);
4a740838 3333fail1:
cfdda9d7
SW		 3334 c4iw_put_ep(&ep->com);
3335out:
3336 return err;
3337}
3338
830662f6
VP		 3339static int create_server6(struct c4iw_dev *dev, struct c4iw_listen_ep *ep)
3340{
3341 int err;
9eccfe10 3342 struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *)
170003c8 3343 &ep->com.local_addr;
830662f6 3344
28de1f74
H		 3345 if (ipv6_addr_type(&sin6->sin6_addr) != IPV6_ADDR_ANY) {
3346 err = cxgb4_clip_get(ep->com.dev->rdev.lldi.ports[0],
3347 (const u32 *)&sin6->sin6_addr.s6_addr, 1);
3348 if (err)
3349 return err;
3350 }
830662f6
VP		 3351 c4iw_init_wr_wait(&ep->com.wr_wait);
3352 err = cxgb4_create_server6(ep->com.dev->rdev.lldi.ports[0],
3353 ep->stid, &sin6->sin6_addr,
3354 sin6->sin6_port,
3355 ep->com.dev->rdev.lldi.rxq_ids[0]);
3356 if (!err)
3357 err = c4iw_wait_for_reply(&ep->com.dev->rdev,
3358 &ep->com.wr_wait,
3359 0, 0, __func__);
e6b11163
H		 3360 else if (err > 0)
3361 err = net_xmit_errno(err);
28de1f74
H		 3362 if (err) {
3363 cxgb4_clip_release(ep->com.dev->rdev.lldi.ports[0],
3364 (const u32 *)&sin6->sin6_addr.s6_addr, 1);
830662f6
VP		 3365 pr_err("cxgb4_create_server6/filter failed err %d stid %d laddr %pI6 lport %d\n",
3366 err, ep->stid,
3367 sin6->sin6_addr.s6_addr, ntohs(sin6->sin6_port));
28de1f74 3368 }
830662f6
VP		 3369 return err;
3370}
3371
3372static int create_server4(struct c4iw_dev *dev, struct c4iw_listen_ep *ep)
3373{
3374 int err;
9eccfe10 3375 struct sockaddr_in *sin = (struct sockaddr_in *)
170003c8 3376 &ep->com.local_addr;
830662f6
VP		 3377
3378 if (dev->rdev.lldi.enable_fw_ofld_conn) {
3379 do {
3380 err = cxgb4_create_server_filter(
3381 ep->com.dev->rdev.lldi.ports[0], ep->stid,
3382 sin->sin_addr.s_addr, sin->sin_port, 0,
3383 ep->com.dev->rdev.lldi.rxq_ids[0], 0, 0);
3384 if (err == -EBUSY) {
99718e59
H		 3385 if (c4iw_fatal_error(&ep->com.dev->rdev)) {
3386 err = -EIO;
3387 break;
3388 }
830662f6
VP		 3389 set_current_state(TASK_UNINTERRUPTIBLE);
3390 schedule_timeout(usecs_to_jiffies(100));
3391 }
3392 } while (err == -EBUSY);
3393 } else {
3394 c4iw_init_wr_wait(&ep->com.wr_wait);
3395 err = cxgb4_create_server(ep->com.dev->rdev.lldi.ports[0],
3396 ep->stid, sin->sin_addr.s_addr, sin->sin_port,
3397 0, ep->com.dev->rdev.lldi.rxq_ids[0]);
3398 if (!err)
3399 err = c4iw_wait_for_reply(&ep->com.dev->rdev,
3400 &ep->com.wr_wait,
3401 0, 0, __func__);
e6b11163
H		 3402 else if (err > 0)
3403 err = net_xmit_errno(err);
830662f6
VP		 3404 }
3405 if (err)
3406 pr_err("cxgb4_create_server/filter failed err %d stid %d laddr %pI4 lport %d\n"
3407 , err, ep->stid,
3408 &sin->sin_addr, ntohs(sin->sin_port));
3409 return err;
3410}
3411
cfdda9d7
SW		 3412int c4iw_create_listen(struct iw_cm_id *cm_id, int backlog)
3413{
3414 int err = 0;
3415 struct c4iw_dev *dev = to_c4iw_dev(cm_id->device);
3416 struct c4iw_listen_ep *ep;
3417
cfdda9d7
SW		 3418 might_sleep();
3419
3420 ep = alloc_ep(sizeof(*ep), GFP_KERNEL);
3421 if (!ep) {
700456bd 3422 pr_err("%s - cannot alloc ep\n", __func__);
cfdda9d7
SW		 3423 err = -ENOMEM;
3424 goto fail1;
3425 }
4a740838 3426 skb_queue_head_init(&ep->com.ep_skb_list);
a9a42886 3427 pr_debug("%s ep %p\n", __func__, ep);
cfdda9d7 3428 ep->com.cm_id = cm_id;
9ca6f7cf 3429 ref_cm_id(&ep->com);
cfdda9d7
SW		 3430 ep->com.dev = dev;
3431 ep->backlog = backlog;
170003c8 3432 memcpy(&ep->com.local_addr, &cm_id->m_local_addr,
24d44a39 3433 sizeof(ep->com.local_addr));
cfdda9d7
SW		 3434
3435 /*
3436 * Allocate a server TID.
3437 */
8c044690
KS		 3438 if (dev->rdev.lldi.enable_fw_ofld_conn &&
3439 ep->com.local_addr.ss_family == AF_INET)
830662f6 3440 ep->stid = cxgb4_alloc_sftid(dev->rdev.lldi.tids,
170003c8 3441 cm_id->m_local_addr.ss_family, ep);
1cab775c 3442 else
830662f6 3443 ep->stid = cxgb4_alloc_stid(dev->rdev.lldi.tids,
170003c8 3444 cm_id->m_local_addr.ss_family, ep);
1cab775c 3445
cfdda9d7 3446 if (ep->stid == -1) {
700456bd 3447 pr_err("%s - cannot alloc stid\n", __func__);
cfdda9d7
SW		 3448 err = -ENOMEM;
3449 goto fail2;
3450 }
793dad94 3451 insert_handle(dev, &dev->stid_idr, ep, ep->stid);
9eccfe10 3452
170003c8
SW		 3453 memcpy(&ep->com.local_addr, &cm_id->m_local_addr,
3454 sizeof(ep->com.local_addr));
9eccfe10 3455
cfdda9d7 3456 state_set(&ep->com, LISTEN);
830662f6
VP		 3457 if (ep->com.local_addr.ss_family == AF_INET)
3458 err = create_server4(dev, ep);
3459 else
3460 err = create_server6(dev, ep);
cfdda9d7
SW		 3461 if (!err) {
3462 cm_id->provider_data = ep;
3463 goto out;
3464 }
9eccfe10 3465
830662f6
VP		 3466 cxgb4_free_stid(ep->com.dev->rdev.lldi.tids, ep->stid,
3467 ep->com.local_addr.ss_family);
cfdda9d7 3468fail2:
9ca6f7cf 3469 deref_cm_id(&ep->com);
cfdda9d7
SW		 3470 c4iw_put_ep(&ep->com);
3471fail1:
3472out:
3473 return err;
3474}
3475
3476int c4iw_destroy_listen(struct iw_cm_id *cm_id)
3477{
3478 int err;
3479 struct c4iw_listen_ep *ep = to_listen_ep(cm_id);
3480
a9a42886 3481 pr_debug("%s ep %p\n", __func__, ep);
cfdda9d7
SW		 3482
3483 might_sleep();
3484 state_set(&ep->com, DEAD);
830662f6
VP		 3485 if (ep->com.dev->rdev.lldi.enable_fw_ofld_conn &&
3486 ep->com.local_addr.ss_family == AF_INET) {
1cab775c
VP		 3487 err = cxgb4_remove_server_filter(
3488 ep->com.dev->rdev.lldi.ports[0], ep->stid,
3489 ep->com.dev->rdev.lldi.rxq_ids[0], 0);
3490 } else {
84cc6ac6 3491 struct sockaddr_in6 *sin6;
1cab775c 3492 c4iw_init_wr_wait(&ep->com.wr_wait);
830662f6
VP		 3493 err = cxgb4_remove_server(
3494 ep->com.dev->rdev.lldi.ports[0], ep->stid,
3495 ep->com.dev->rdev.lldi.rxq_ids[0], 0);
1cab775c
VP		 3496 if (err)
3497 goto done;
3498 err = c4iw_wait_for_reply(&ep->com.dev->rdev, &ep->com.wr_wait,
3499 0, 0, __func__);
170003c8 3500 sin6 = (struct sockaddr_in6 *)&ep->com.local_addr;
84cc6ac6
H		 3501 cxgb4_clip_release(ep->com.dev->rdev.lldi.ports[0],
3502 (const u32 *)&sin6->sin6_addr.s6_addr, 1);
1cab775c 3503 }
793dad94 3504 remove_handle(ep->com.dev, &ep->com.dev->stid_idr, ep->stid);
830662f6
VP		 3505 cxgb4_free_stid(ep->com.dev->rdev.lldi.tids, ep->stid,
3506 ep->com.local_addr.ss_family);
cfdda9d7 3507done:
9ca6f7cf 3508 deref_cm_id(&ep->com);
cfdda9d7
SW		 3509 c4iw_put_ep(&ep->com);
3510 return err;
3511}
3512
3513int c4iw_ep_disconnect(struct c4iw_ep *ep, int abrupt, gfp_t gfp)
3514{
3515 int ret = 0;
cfdda9d7
SW		 3516 int close = 0;
3517 int fatal = 0;
3518 struct c4iw_rdev *rdev;
cfdda9d7 3519
2f5b48c3 3520 mutex_lock(&ep->com.mutex);
cfdda9d7 3521
a9a42886
JP		 3522 pr_debug("%s ep %p state %s, abrupt %d\n", __func__, ep,
3523 states[ep->com.state], abrupt);
cfdda9d7 3524
6e410d8f
H		 3525 /*
3526 * Ref the ep here in case we have fatal errors causing the
3527 * ep to be released and freed.
3528 */
3529 c4iw_get_ep(&ep->com);
3530
cfdda9d7
SW		 3531 rdev = &ep->com.dev->rdev;
3532 if (c4iw_fatal_error(rdev)) {
3533 fatal = 1;
be13b2df 3534 close_complete_upcall(ep, -EIO);
cfdda9d7
SW		 3535 ep->com.state = DEAD;
3536 }
3537 switch (ep->com.state) {
3538 case MPA_REQ_WAIT:
3539 case MPA_REQ_SENT:
3540 case MPA_REQ_RCVD:
3541 case MPA_REP_SENT:
3542 case FPDU_MODE:
4a740838 3543 case CONNECTING:
cfdda9d7
SW		 3544 close = 1;
3545 if (abrupt)
3546 ep->com.state = ABORTING;
3547 else {
3548 ep->com.state = CLOSING;
12eb5137
SW		 3549
3550 /*
3551 * if we close before we see the fw4_ack() then we fix
3552 * up the timer state since we're reusing it.
3553 */
3554 if (ep->mpa_skb &&
3555 test_bit(STOP_MPA_TIMER, &ep->com.flags)) {
3556 clear_bit(STOP_MPA_TIMER, &ep->com.flags);
3557 stop_ep_timer(ep);
3558 }
ca5a2202 3559 start_ep_timer(ep);
cfdda9d7
SW		 3560 }
3561 set_bit(CLOSE_SENT, &ep->com.flags);
3562 break;
3563 case CLOSING:
3564 if (!test_and_set_bit(CLOSE_SENT, &ep->com.flags)) {
3565 close = 1;
3566 if (abrupt) {
b33bd0cb 3567 (void)stop_ep_timer(ep);
cfdda9d7
SW		 3568 ep->com.state = ABORTING;
3569 } else
3570 ep->com.state = MORIBUND;
3571 }
3572 break;
3573 case MORIBUND:
3574 case ABORTING:
3575 case DEAD:
a9a42886
JP		 3576 pr_debug("%s ignoring disconnect ep %p state %u\n",
3577 __func__, ep, ep->com.state);
cfdda9d7
SW		 3578 break;
3579 default:
3580 BUG();
3581 break;
3582 }
3583
cfdda9d7 3584 if (close) {
8da7e7a5 3585 if (abrupt) {
793dad94 3586 set_bit(EP_DISC_ABORT, &ep->com.history);
be13b2df 3587 close_complete_upcall(ep, -ECONNRESET);
4a740838 3588 ret = send_abort(ep);
793dad94
VP		 3589 } else {
3590 set_bit(EP_DISC_CLOSE, &ep->com.history);
4a740838 3591 ret = send_halfclose(ep);
793dad94 3592 }
88bc230d 3593 if (ret) {
9ca6f7cf 3594 set_bit(EP_DISC_FAIL, &ep->com.history);
88bc230d
H		 3595 if (!abrupt) {
3596 stop_ep_timer(ep);
3597 close_complete_upcall(ep, -EIO);
3598 }
c00dcbaf
H		 3599 if (ep->com.qp) {
3600 struct c4iw_qp_attributes attrs;
3601
3602 attrs.next_state = C4IW_QP_STATE_ERROR;
3603 ret = c4iw_modify_qp(ep->com.qp->rhp,
3604 ep->com.qp,
3605 C4IW_QP_ATTR_NEXT_STATE,
3606 &attrs, 1);
3607 if (ret)
700456bd 3608 pr_err("%s - qp <- error failed!\n",
c00dcbaf
H		 3609 __func__);
3610 }
cfdda9d7 3611 fatal = 1;
88bc230d 3612 }
cfdda9d7 3613 }
8da7e7a5 3614 mutex_unlock(&ep->com.mutex);
6e410d8f 3615 c4iw_put_ep(&ep->com);
cfdda9d7
SW		 3616 if (fatal)
3617 release_ep_resources(ep);
3618 return ret;
3619}
3620
1cab775c
VP		 3621static void active_ofld_conn_reply(struct c4iw_dev *dev, struct sk_buff *skb,
3622 struct cpl_fw6_msg_ofld_connection_wr_rpl *req)
3623{
3624 struct c4iw_ep *ep;
793dad94 3625 int atid = be32_to_cpu(req->tid);
1cab775c 3626
ef5d6355
VP		 3627 ep = (struct c4iw_ep *)lookup_atid(dev->rdev.lldi.tids,
3628 (__force u32) req->tid);
1cab775c
VP		 3629 if (!ep)
3630 return;
3631
3632 switch (req->retval) {
3633 case FW_ENOMEM:
793dad94
VP		 3634 set_bit(ACT_RETRY_NOMEM, &ep->com.history);
3635 if (ep->retry_count++ < ACT_OPEN_RETRY_COUNT) {
3636 send_fw_act_open_req(ep, atid);
3637 return;
3638 }
1cab775c 3639 case FW_EADDRINUSE:
793dad94
VP		 3640 set_bit(ACT_RETRY_INUSE, &ep->com.history);
3641 if (ep->retry_count++ < ACT_OPEN_RETRY_COUNT) {
3642 send_fw_act_open_req(ep, atid);
3643 return;
3644 }
1cab775c
VP		 3645 break;
3646 default:
3647 pr_info("%s unexpected ofld conn wr retval %d\n",
3648 __func__, req->retval);
3649 break;
3650 }
793dad94
VP		 3651 pr_err("active ofld_connect_wr failure %d atid %d\n",
3652 req->retval, atid);
3653 mutex_lock(&dev->rdev.stats.lock);
3654 dev->rdev.stats.act_ofld_conn_fails++;
3655 mutex_unlock(&dev->rdev.stats.lock);
1cab775c 3656 connect_reply_upcall(ep, status2errno(req->retval));
793dad94 3657 state_set(&ep->com, DEAD);
84cc6ac6
H		 3658 if (ep->com.remote_addr.ss_family == AF_INET6) {
3659 struct sockaddr_in6 *sin6 =
170003c8 3660 (struct sockaddr_in6 *)&ep->com.local_addr;
84cc6ac6
H		 3661 cxgb4_clip_release(ep->com.dev->rdev.lldi.ports[0],
3662 (const u32 *)&sin6->sin6_addr.s6_addr, 1);
3663 }
793dad94
VP		 3664 remove_handle(dev, &dev->atid_idr, atid);
3665 cxgb4_free_atid(dev->rdev.lldi.tids, atid);
3666 dst_release(ep->dst);
3667 cxgb4_l2t_release(ep->l2t);
3668 c4iw_put_ep(&ep->com);
1cab775c
VP		 3669}
3670
3671static void passive_ofld_conn_reply(struct c4iw_dev *dev, struct sk_buff *skb,
3672 struct cpl_fw6_msg_ofld_connection_wr_rpl *req)
3673{
3674 struct sk_buff *rpl_skb;
3675 struct cpl_pass_accept_req *cpl;
3676 int ret;
3677
710a3110 3678 rpl_skb = (struct sk_buff *)(unsigned long)req->cookie;
1cab775c
VP		 3679 BUG_ON(!rpl_skb);
3680 if (req->retval) {
a9a42886 3681 pr_debug("%s passive open failure %d\n", __func__, req->retval);
793dad94
VP		 3682 mutex_lock(&dev->rdev.stats.lock);
3683 dev->rdev.stats.pas_ofld_conn_fails++;
3684 mutex_unlock(&dev->rdev.stats.lock);
1cab775c
VP		 3685 kfree_skb(rpl_skb);
3686 } else {
3687 cpl = (struct cpl_pass_accept_req *)cplhdr(rpl_skb);
3688 OPCODE_TID(cpl) = htonl(MK_OPCODE_TID(CPL_PASS_ACCEPT_REQ,
ef5d6355
VP		 3689 (__force u32) htonl(
3690 (__force u32) req->tid)));
1cab775c
VP		 3691 ret = pass_accept_req(dev, rpl_skb);
3692 if (!ret)
3693 kfree_skb(rpl_skb);
3694 }
3695 return;
3696}
3697
3698static int deferred_fw6_msg(struct c4iw_dev *dev, struct sk_buff *skb)
2f5b48c3
SW		 3699{
3700 struct cpl_fw6_msg *rpl = cplhdr(skb);
1cab775c
VP		 3701 struct cpl_fw6_msg_ofld_connection_wr_rpl *req;
3702
3703 switch (rpl->type) {
3704 case FW6_TYPE_CQE:
3705 c4iw_ev_dispatch(dev, (struct t4_cqe *)&rpl->data[0]);
3706 break;
3707 case FW6_TYPE_OFLD_CONNECTION_WR_RPL:
3708 req = (struct cpl_fw6_msg_ofld_connection_wr_rpl *)rpl->data;
3709 switch (req->t_state) {
3710 case TCP_SYN_SENT:
3711 active_ofld_conn_reply(dev, skb, req);
3712 break;
3713 case TCP_SYN_RECV:
3714 passive_ofld_conn_reply(dev, skb, req);
3715 break;
3716 default:
3717 pr_err("%s unexpected ofld conn wr state %d\n",
3718 __func__, req->t_state);
3719 break;
3720 }
3721 break;
3722 }
3723 return 0;
3724}
3725
3726static void build_cpl_pass_accept_req(struct sk_buff *skb, int stid , u8 tos)
3727{
963cab50
H		 3728 __be32 l2info;
3729 __be16 hdr_len, vlantag, len;
3730 u16 eth_hdr_len;
3731 int tcp_hdr_len, ip_hdr_len;
1cab775c
VP		 3732 u8 intf;
3733 struct cpl_rx_pkt *cpl = cplhdr(skb);
3734 struct cpl_pass_accept_req *req;
3735 struct tcp_options_received tmp_opt;
f079af7a 3736 struct c4iw_dev *dev;
963cab50 3737 enum chip_type type;
1cab775c 3738
f079af7a 3739 dev = *((struct c4iw_dev **) (skb->cb + sizeof(void *)));
1cab775c 3740 /* Store values from cpl_rx_pkt in temporary location. */
963cab50
H		 3741 vlantag = cpl->vlan;
3742 len = cpl->len;
3743 l2info = cpl->l2info;
3744 hdr_len = cpl->hdr_len;
1cab775c
VP		 3745 intf = cpl->iff;
3746
3747 __skb_pull(skb, sizeof(*req) + sizeof(struct rss_header));
3748
3749 /*
3750 * We need to parse the TCP options from SYN packet.
3751 * to generate cpl_pass_accept_req.
3752 */
3753 memset(&tmp_opt, 0, sizeof(tmp_opt));
3754 tcp_clear_options(&tmp_opt);
1a2c6181 3755 tcp_parse_options(skb, &tmp_opt, 0, NULL);
1cab775c
VP		 3756
3757 req = (struct cpl_pass_accept_req *)__skb_push(skb, sizeof(*req));
3758 memset(req, 0, sizeof(*req));
cf7fe64a
HS		 3759 req->l2info = cpu_to_be16(SYN_INTF_V(intf) |
3760 SYN_MAC_IDX_V(RX_MACIDX_G(
963cab50 3761 be32_to_cpu(l2info))) |
cf7fe64a 3762 SYN_XACT_MATCH_F);
963cab50
H		 3763 type = dev->rdev.lldi.adapter_type;
3764 tcp_hdr_len = RX_TCPHDR_LEN_G(be16_to_cpu(hdr_len));
3765 ip_hdr_len = RX_IPHDR_LEN_G(be16_to_cpu(hdr_len));
3766 req->hdr_len =
3767 cpu_to_be32(SYN_RX_CHAN_V(RX_CHAN_G(be32_to_cpu(l2info))));
3768 if (CHELSIO_CHIP_VERSION(type) <= CHELSIO_T5) {
3769 eth_hdr_len = is_t4(type) ?
3770 RX_ETHHDR_LEN_G(be32_to_cpu(l2info)) :
3771 RX_T5_ETHHDR_LEN_G(be32_to_cpu(l2info));
3772 req->hdr_len |= cpu_to_be32(TCP_HDR_LEN_V(tcp_hdr_len) |
3773 IP_HDR_LEN_V(ip_hdr_len) |
3774 ETH_HDR_LEN_V(eth_hdr_len));
3775 } else { /* T6 and later */
3776 eth_hdr_len = RX_T6_ETHHDR_LEN_G(be32_to_cpu(l2info));
3777 req->hdr_len |= cpu_to_be32(T6_TCP_HDR_LEN_V(tcp_hdr_len) |
3778 T6_IP_HDR_LEN_V(ip_hdr_len) |
3779 T6_ETH_HDR_LEN_V(eth_hdr_len));
3780 }
3781 req->vlan = vlantag;
3782 req->len = len;
6c53e938
HS		 3783 req->tos_stid = cpu_to_be32(PASS_OPEN_TID_V(stid) |
3784 PASS_OPEN_TOS_V(tos));
1cab775c
VP		 3785 req->tcpopt.mss = htons(tmp_opt.mss_clamp);
3786 if (tmp_opt.wscale_ok)
3787 req->tcpopt.wsf = tmp_opt.snd_wscale;
3788 req->tcpopt.tstamp = tmp_opt.saw_tstamp;
3789 if (tmp_opt.sack_ok)
3790 req->tcpopt.sack = 1;
3791 OPCODE_TID(req) = htonl(MK_OPCODE_TID(CPL_PASS_ACCEPT_REQ, 0));
3792 return;
3793}
3794
3795static void send_fw_pass_open_req(struct c4iw_dev *dev, struct sk_buff *skb,
3796 __be32 laddr, __be16 lport,
3797 __be32 raddr, __be16 rport,
3798 u32 rcv_isn, u32 filter, u16 window,
3799 u32 rss_qid, u8 port_id)
3800{
3801 struct sk_buff *req_skb;
3802 struct fw_ofld_connection_wr *req;
3803 struct cpl_pass_accept_req *cpl = cplhdr(skb);
1ce1d471 3804 int ret;
1cab775c
VP		 3805
3806 req_skb = alloc_skb(sizeof(struct fw_ofld_connection_wr), GFP_KERNEL);
9ef63f31
PB		 3807 if (!req_skb)
3808 return;
1cab775c
VP		 3809 req = (struct fw_ofld_connection_wr *)__skb_put(req_skb, sizeof(*req));
3810 memset(req, 0, sizeof(*req));
6c53e938 3811 req->op_compl = htonl(WR_OP_V(FW_OFLD_CONNECTION_WR) | FW_WR_COMPL_F);
e2ac9628 3812 req->len16_pkd = htonl(FW_WR_LEN16_V(DIV_ROUND_UP(sizeof(*req), 16)));
77a80e23 3813 req->le.version_cpl = htonl(FW_OFLD_CONNECTION_WR_CPL_F);
ef5d6355 3814 req->le.filter = (__force __be32) filter;
1cab775c
VP		 3815 req->le.lport = lport;
3816 req->le.pport = rport;
3817 req->le.u.ipv4.lip = laddr;
3818 req->le.u.ipv4.pip = raddr;
3819 req->tcb.rcv_nxt = htonl(rcv_isn + 1);
3820 req->tcb.rcv_adv = htons(window);
3821 req->tcb.t_state_to_astid =
77a80e23
HS		 3822 htonl(FW_OFLD_CONNECTION_WR_T_STATE_V(TCP_SYN_RECV) |
3823 FW_OFLD_CONNECTION_WR_RCV_SCALE_V(cpl->tcpopt.wsf) |
3824 FW_OFLD_CONNECTION_WR_ASTID_V(
6c53e938 3825 PASS_OPEN_TID_G(ntohl(cpl->tos_stid))));
1cab775c
VP		 3826
3827 /*
3828 * We store the qid in opt2 which will be used by the firmware
3829 * to send us the wr response.
3830 */
d7990b0c 3831 req->tcb.opt2 = htonl(RSS_QUEUE_V(rss_qid));
1cab775c
VP		 3832
3833 /*
3834 * We initialize the MSS index in TCB to 0xF.
3835 * So that when driver sends cpl_pass_accept_rpl
3836 * TCB picks up the correct value. If this was 0
3837 * TP will ignore any value > 0 for MSS index.
3838 */
d7990b0c 3839 req->tcb.opt0 = cpu_to_be64(MSS_IDX_V(0xF));
6198dd8d 3840 req->cookie = (uintptr_t)skb;
1cab775c
VP		 3841
3842 set_wr_txq(req_skb, CPL_PRIORITY_CONTROL, port_id);
1ce1d471
SW		 3843 ret = cxgb4_ofld_send(dev->rdev.lldi.ports[0], req_skb);
3844 if (ret < 0) {
3845 pr_err("%s - cxgb4_ofld_send error %d - dropping\n", __func__,
3846 ret);
3847 kfree_skb(skb);
3848 kfree_skb(req_skb);
3849 }
1cab775c
VP		 3850}
3851
3852/*
3853 * Handler for CPL_RX_PKT message. Need to handle cpl_rx_pkt
3854 * messages when a filter is being used instead of server to
3855 * redirect a syn packet. When packets hit filter they are redirected
3856 * to the offload queue and driver tries to establish the connection
3857 * using firmware work request.
3858 */
3859static int rx_pkt(struct c4iw_dev *dev, struct sk_buff *skb)
3860{
3861 int stid;
3862 unsigned int filter;
3863 struct ethhdr *eh = NULL;
3864 struct vlan_ethhdr *vlan_eh = NULL;
3865 struct iphdr *iph;
3866 struct tcphdr *tcph;
3867 struct rss_header *rss = (void *)skb->data;
3868 struct cpl_rx_pkt *cpl = (void *)skb->data;
3869 struct cpl_pass_accept_req *req = (void *)(rss + 1);
3870 struct l2t_entry *e;
3871 struct dst_entry *dst;
f86fac79 3872 struct c4iw_ep *lep = NULL;
1cab775c
VP		 3873 u16 window;
3874 struct port_info *pi;
3875 struct net_device *pdev;
f079af7a 3876 u16 rss_qid, eth_hdr_len;
1cab775c
VP		 3877 int step;
3878 u32 tx_chan;
3879 struct neighbour *neigh;
3880
3881 /* Drop all non-SYN packets */
bdc590b9 3882 if (!(cpl->l2info & cpu_to_be32(RXF_SYN_F)))
1cab775c
VP		 3883 goto reject;
3884
3885 /*
3886 * Drop all packets which did not hit the filter.
3887 * Unlikely to happen.
3888 */
3889 if (!(rss->filter_hit && rss->filter_tid))
3890 goto reject;
3891
3892 /*
3893 * Calculate the server tid from filter hit index from cpl_rx_pkt.
3894 */
a4ea025f 3895 stid = (__force int) cpu_to_be32((__force u32) rss->hash_val);
1cab775c 3896
f86fac79 3897 lep = (struct c4iw_ep *)get_ep_from_stid(dev, stid);
1cab775c 3898 if (!lep) {
a9a42886
JP		 3899 pr_debug("%s connect request on invalid stid %d\n",
3900 __func__, stid);
1cab775c
VP		 3901 goto reject;
3902 }
3903
963cab50
H		 3904 switch (CHELSIO_CHIP_VERSION(dev->rdev.lldi.adapter_type)) {
3905 case CHELSIO_T4:
3906 eth_hdr_len = RX_ETHHDR_LEN_G(be32_to_cpu(cpl->l2info));
3907 break;
3908 case CHELSIO_T5:
3909 eth_hdr_len = RX_T5_ETHHDR_LEN_G(be32_to_cpu(cpl->l2info));
3910 break;
3911 case CHELSIO_T6:
3912 eth_hdr_len = RX_T6_ETHHDR_LEN_G(be32_to_cpu(cpl->l2info));
3913 break;
3914 default:
3915 pr_err("T%d Chip is not supported\n",
3916 CHELSIO_CHIP_VERSION(dev->rdev.lldi.adapter_type));
3917 goto reject;
3918 }
3919
f079af7a 3920 if (eth_hdr_len == ETH_HLEN) {
1cab775c
VP		 3921 eh = (struct ethhdr *)(req + 1);
3922 iph = (struct iphdr *)(eh + 1);
3923 } else {
3924 vlan_eh = (struct vlan_ethhdr *)(req + 1);
3925 iph = (struct iphdr *)(vlan_eh + 1);
3926 skb->vlan_tci = ntohs(cpl->vlan);
3927 }
3928
3929 if (iph->version != 0x4)
3930 goto reject;
3931
3932 tcph = (struct tcphdr *)(iph + 1);
3933 skb_set_network_header(skb, (void *)iph - (void *)rss);
3934 skb_set_transport_header(skb, (void *)tcph - (void *)rss);
3935 skb_get(skb);
3936
a9a42886
JP		 3937 pr_debug("%s lip 0x%x lport %u pip 0x%x pport %u tos %d\n", __func__,
3938 ntohl(iph->daddr), ntohs(tcph->dest), ntohl(iph->saddr),
3939 ntohs(tcph->source), iph->tos);
1cab775c 3940
804c2f3e
VP		 3941 dst = cxgb_find_route(&dev->rdev.lldi, get_real_dev,
3942 iph->daddr, iph->saddr, tcph->dest,
3943 tcph->source, iph->tos);
830662f6 3944 if (!dst) {
1cab775c
VP		 3945 pr_err("%s - failed to find dst entry!\n",
3946 __func__);
3947 goto reject;
3948 }
1cab775c
VP		 3949 neigh = dst_neigh_lookup_skb(dst, skb);
3950
aaa0c23c
ZZ		 3951 if (!neigh) {
3952 pr_err("%s - failed to allocate neigh!\n",
3953 __func__);
3954 goto free_dst;
3955 }
3956
1cab775c
VP		 3957 if (neigh->dev->flags & IFF_LOOPBACK) {
3958 pdev = ip_dev_find(&init_net, iph->daddr);
3959 e = cxgb4_l2t_get(dev->rdev.lldi.l2t, neigh,
3960 pdev, 0);
3961 pi = (struct port_info *)netdev_priv(pdev);
3962 tx_chan = cxgb4_port_chan(pdev);
3963 dev_put(pdev);
3964 } else {
830662f6 3965 pdev = get_real_dev(neigh->dev);
1cab775c 3966 e = cxgb4_l2t_get(dev->rdev.lldi.l2t, neigh,
830662f6
VP		 3967 pdev, 0);
3968 pi = (struct port_info *)netdev_priv(pdev);
3969 tx_chan = cxgb4_port_chan(pdev);
1cab775c 3970 }
ebf00060 3971 neigh_release(neigh);
1cab775c
VP		 3972 if (!e) {
3973 pr_err("%s - failed to allocate l2t entry!\n",
3974 __func__);
3975 goto free_dst;
3976 }
3977
3978 step = dev->rdev.lldi.nrxq / dev->rdev.lldi.nchan;
3979 rss_qid = dev->rdev.lldi.rxq_ids[pi->port_id * step];
ef5d6355 3980 window = (__force u16) htons((__force u16)tcph->window);
1cab775c
VP		 3981
3982 /* Calcuate filter portion for LE region. */
41b4f86c
KS		 3983 filter = (__force unsigned int) cpu_to_be32(cxgb4_select_ntuple(
3984 dev->rdev.lldi.ports[0],
3985 e));
1cab775c
VP		 3986
3987 /*
3988 * Synthesize the cpl_pass_accept_req. We have everything except the
3989 * TID. Once firmware sends a reply with TID we update the TID field
3990 * in cpl and pass it through the regular cpl_pass_accept_req path.
3991 */
3992 build_cpl_pass_accept_req(skb, stid, iph->tos);
3993 send_fw_pass_open_req(dev, skb, iph->daddr, tcph->dest, iph->saddr,
3994 tcph->source, ntohl(tcph->seq), filter, window,
3995 rss_qid, pi->port_id);
3996 cxgb4_l2t_release(e);
3997free_dst:
3998 dst_release(dst);
3999reject:
f86fac79
H		 4000 if (lep)
4001 c4iw_put_ep(&lep->com);
2f5b48c3
SW		 4002 return 0;
4003}
4004
be4c9bad
RD		 4005/*
4006 * These are the real handlers that are called from a
4007 * work queue.
4008 */
9dec900c 4009static c4iw_handler_func work_handlers[NUM_CPL_CMDS + NUM_FAKE_CPLS] = {
be4c9bad
RD		 4010 [CPL_ACT_ESTABLISH] = act_establish,
4011 [CPL_ACT_OPEN_RPL] = act_open_rpl,
4012 [CPL_RX_DATA] = rx_data,
4013 [CPL_ABORT_RPL_RSS] = abort_rpl,
4014 [CPL_ABORT_RPL] = abort_rpl,
4015 [CPL_PASS_OPEN_RPL] = pass_open_rpl,
4016 [CPL_CLOSE_LISTSRV_RPL] = close_listsrv_rpl,
4017 [CPL_PASS_ACCEPT_REQ] = pass_accept_req,
4018 [CPL_PASS_ESTABLISH] = pass_establish,
4019 [CPL_PEER_CLOSE] = peer_close,
4020 [CPL_ABORT_REQ_RSS] = peer_abort,
4021 [CPL_CLOSE_CON_RPL] = close_con_rpl,
4022 [CPL_RDMA_TERMINATE] = terminate,
2f5b48c3 4023 [CPL_FW4_ACK] = fw4_ack,
1cab775c 4024 [CPL_FW6_MSG] = deferred_fw6_msg,
9dec900c 4025 [CPL_RX_PKT] = rx_pkt,
8d1f1a6b
H		 4026 [FAKE_CPL_PUT_EP_SAFE] = _put_ep_safe,
4027 [FAKE_CPL_PASS_PUT_EP_SAFE] = _put_pass_ep_safe
be4c9bad
RD		 4028};
4029
4030static void process_timeout(struct c4iw_ep *ep)
4031{
4032 struct c4iw_qp_attributes attrs;
4033 int abort = 1;
4034
2f5b48c3 4035 mutex_lock(&ep->com.mutex);
a9a42886
JP		 4036 pr_debug("%s ep %p tid %u state %d\n", __func__, ep, ep->hwtid,
4037 ep->com.state);
793dad94 4038 set_bit(TIMEDOUT, &ep->com.history);
be4c9bad
RD		 4039 switch (ep->com.state) {
4040 case MPA_REQ_SENT:
be4c9bad
RD		 4041 connect_reply_upcall(ep, -ETIMEDOUT);
4042 break;
4043 case MPA_REQ_WAIT:
ceb110a8 4044 case MPA_REQ_RCVD:
e4b76a2a 4045 case MPA_REP_SENT:
ceb110a8 4046 case FPDU_MODE:
be4c9bad
RD		 4047 break;
4048 case CLOSING:
4049 case MORIBUND:
4050 if (ep->com.cm_id && ep->com.qp) {
4051 attrs.next_state = C4IW_QP_STATE_ERROR;
4052 c4iw_modify_qp(ep->com.qp->rhp,
4053 ep->com.qp, C4IW_QP_ATTR_NEXT_STATE,
4054 &attrs, 1);
4055 }
be13b2df 4056 close_complete_upcall(ep, -ETIMEDOUT);
be4c9bad 4057 break;
b33bd0cb
SW		 4058 case ABORTING:
4059 case DEAD:
4060
4061 /*
4062 * These states are expected if the ep timed out at the same
4063 * time as another thread was calling stop_ep_timer().
4064 * So we silently do nothing for these states.
4065 */
4066 abort = 0;
4067 break;
be4c9bad 4068 default:
76f267b7 4069 WARN(1, "%s unexpected state ep %p tid %u state %u\n",
be4c9bad 4070 __func__, ep, ep->hwtid, ep->com.state);
be4c9bad
RD		 4071 abort = 0;
4072 }
cc18b939 4073 mutex_unlock(&ep->com.mutex);
69736279
H		 4074 if (abort)
4075 c4iw_ep_disconnect(ep, 1, GFP_KERNEL);
be4c9bad
RD		 4076 c4iw_put_ep(&ep->com);
4077}
4078
4079static void process_timedout_eps(void)
4080{
4081 struct c4iw_ep *ep;
4082
4083 spin_lock_irq(&timeout_lock);
4084 while (!list_empty(&timeout_list)) {
4085 struct list_head *tmp;
4086
4087 tmp = timeout_list.next;
4088 list_del(tmp);
b33bd0cb
SW		 4089 tmp->next = NULL;
4090 tmp->prev = NULL;
be4c9bad
RD		 4091 spin_unlock_irq(&timeout_lock);
4092 ep = list_entry(tmp, struct c4iw_ep, entry);
4093 process_timeout(ep);
4094 spin_lock_irq(&timeout_lock);
4095 }
4096 spin_unlock_irq(&timeout_lock);
4097}
4098
4099static void process_work(struct work_struct *work)
4100{
4101 struct sk_buff *skb = NULL;
4102 struct c4iw_dev *dev;
c1d7356c 4103 struct cpl_act_establish *rpl;
be4c9bad
RD		 4104 unsigned int opcode;
4105 int ret;
4106
b33bd0cb 4107 process_timedout_eps();
be4c9bad
RD		 4108 while ((skb = skb_dequeue(&rxq))) {
4109 rpl = cplhdr(skb);
4110 dev = *((struct c4iw_dev **) (skb->cb + sizeof(void *)));
4111 opcode = rpl->ot.opcode;
4112
4113 BUG_ON(!work_handlers[opcode]);
4114 ret = work_handlers[opcode](dev, skb);
4115 if (!ret)
4116 kfree_skb(skb);
b33bd0cb 4117 process_timedout_eps();
be4c9bad 4118 }
be4c9bad
RD		 4119}
4120
4121static DECLARE_WORK(skb_work, process_work);
4122
4123static void ep_timeout(unsigned long arg)
4124{
4125 struct c4iw_ep *ep = (struct c4iw_ep *)arg;
1ec779cc 4126 int kickit = 0;
be4c9bad
RD		 4127
4128 spin_lock(&timeout_lock);
1ec779cc 4129 if (!test_and_set_bit(TIMEOUT, &ep->com.flags)) {
b33bd0cb
SW		 4130 /*
4131 * Only insert if it is not already on the list.
4132 */
4133 if (!ep->entry.next) {
4134 list_add_tail(&ep->entry, &timeout_list);
4135 kickit = 1;
4136 }
1ec779cc 4137 }
be4c9bad 4138 spin_unlock(&timeout_lock);
1ec779cc
VP		 4139 if (kickit)
4140 queue_work(workq, &skb_work);
be4c9bad
RD		 4141}
4142
cfdda9d7
SW		 4143/*
4144 * All the CM events are handled on a work queue to have a safe context.
4145 */
4146static int sched(struct c4iw_dev *dev, struct sk_buff *skb)
4147{
4148
4149 /*
4150 * Save dev in the skb->cb area.
4151 */
4152 *((struct c4iw_dev **) (skb->cb + sizeof(void *))) = dev;
4153
4154 /*
4155 * Queue the skb and schedule the worker thread.
4156 */
4157 skb_queue_tail(&rxq, skb);
4158 queue_work(workq, &skb_work);
4159 return 0;
4160}
4161
4162static int set_tcb_rpl(struct c4iw_dev *dev, struct sk_buff *skb)
4163{
4164 struct cpl_set_tcb_rpl *rpl = cplhdr(skb);
4165
4166 if (rpl->status != CPL_ERR_NONE) {
700456bd
JP		 4167 pr_err("Unexpected SET_TCB_RPL status %u for tid %u\n",
4168 rpl->status, GET_TID(rpl));
cfdda9d7 4169 }
2f5b48c3 4170 kfree_skb(skb);
cfdda9d7
SW		 4171 return 0;
4172}
4173
be4c9bad
RD		 4174static int fw6_msg(struct c4iw_dev *dev, struct sk_buff *skb)
4175{
4176 struct cpl_fw6_msg *rpl = cplhdr(skb);
4177 struct c4iw_wr_wait *wr_waitp;
4178 int ret;
4179
a9a42886 4180 pr_debug("%s type %u\n", __func__, rpl->type);
be4c9bad
RD		 4181
4182 switch (rpl->type) {
5be78ee9 4183 case FW6_TYPE_WR_RPL:
be4c9bad 4184 ret = (int)((be64_to_cpu(rpl->data[0]) >> 8) & 0xff);
c8e081a1 4185 wr_waitp = (struct c4iw_wr_wait *)(__force unsigned long) rpl->data[1];
a9a42886 4186 pr_debug("%s wr_waitp %p ret %u\n", __func__, wr_waitp, ret);
d9594d99
SW		 4187 if (wr_waitp)
4188 c4iw_wake_up(wr_waitp, ret ? -ret : 0);
2f5b48c3 4189 kfree_skb(skb);
be4c9bad 4190 break;
5be78ee9 4191 case FW6_TYPE_CQE:
5be78ee9 4192 case FW6_TYPE_OFLD_CONNECTION_WR_RPL:
1cab775c 4193 sched(dev, skb);
5be78ee9 4194 break;
be4c9bad 4195 default:
700456bd
JP		 4196 pr_err("%s unexpected fw6 msg type %u\n",
4197 __func__, rpl->type);
2f5b48c3 4198 kfree_skb(skb);
be4c9bad
RD		 4199 break;
4200 }
4201 return 0;
4202}
4203
8da7e7a5
SW		 4204static int peer_abort_intr(struct c4iw_dev *dev, struct sk_buff *skb)
4205{
4206 struct cpl_abort_req_rss *req = cplhdr(skb);
4207 struct c4iw_ep *ep;
8da7e7a5
SW		 4208 unsigned int tid = GET_TID(req);
4209
944661dd
H		 4210 ep = get_ep_from_tid(dev, tid);
4211 /* This EP will be dereferenced in peer_abort() */
14b92228 4212 if (!ep) {
700456bd 4213 pr_warn("Abort on non-existent endpoint, tid %d\n", tid);
14b92228
SW		 4214 kfree_skb(skb);
4215 return 0;
4216 }
b65eef0a 4217 if (cxgb_is_neg_adv(req->status)) {
a9a42886
JP		 4218 pr_debug("%s Negative advice on abort- tid %u status %d (%s)\n",
4219 __func__, ep->hwtid, req->status,
4220 neg_adv_str(req->status));
944661dd 4221 goto out;
8da7e7a5 4222 }
a9a42886
JP		 4223 pr_debug("%s ep %p tid %u state %u\n", __func__, ep, ep->hwtid,
4224 ep->com.state);
8da7e7a5 4225
093108cb 4226 c4iw_wake_up(&ep->com.wr_wait, -ECONNRESET);
944661dd 4227out:
8da7e7a5
SW		 4228 sched(dev, skb);
4229 return 0;
4230}
4231
be4c9bad
RD		 4232/*
4233 * Most upcalls from the T4 Core go to sched() to
4234 * schedule the processing on a work queue.
4235 */
4236c4iw_handler_func c4iw_handlers[NUM_CPL_CMDS] = {
4237 [CPL_ACT_ESTABLISH] = sched,
4238 [CPL_ACT_OPEN_RPL] = sched,
4239 [CPL_RX_DATA] = sched,
4240 [CPL_ABORT_RPL_RSS] = sched,
4241 [CPL_ABORT_RPL] = sched,
4242 [CPL_PASS_OPEN_RPL] = sched,
4243 [CPL_CLOSE_LISTSRV_RPL] = sched,
4244 [CPL_PASS_ACCEPT_REQ] = sched,
4245 [CPL_PASS_ESTABLISH] = sched,
4246 [CPL_PEER_CLOSE] = sched,
4247 [CPL_CLOSE_CON_RPL] = sched,
8da7e7a5 4248 [CPL_ABORT_REQ_RSS] = peer_abort_intr,
be4c9bad
RD		 4249 [CPL_RDMA_TERMINATE] = sched,
4250 [CPL_FW4_ACK] = sched,
4251 [CPL_SET_TCB_RPL] = set_tcb_rpl,
1cab775c
VP		 4252 [CPL_FW6_MSG] = fw6_msg,
4253 [CPL_RX_PKT] = sched
be4c9bad
RD		 4254};
4255
cfdda9d7
SW		 4256int __init c4iw_cm_init(void)
4257{
be4c9bad 4258 spin_lock_init(&timeout_lock);
cfdda9d7
SW		 4259 skb_queue_head_init(&rxq);
4260
52ee1a05 4261 workq = alloc_ordered_workqueue("iw_cxgb4", WQ_MEM_RECLAIM);
cfdda9d7
SW		 4262 if (!workq)
4263 return -ENOMEM;
4264
cfdda9d7
SW		 4265 return 0;
4266}
4267
46c1376d 4268void c4iw_cm_term(void)
cfdda9d7 4269{
be4c9bad 4270 WARN_ON(!list_empty(&timeout_list));
cfdda9d7
SW		 4271 flush_workqueue(workq);
4272 destroy_workqueue(workq);
4273}
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