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RDMA/iw_cxgb4: Add arp failure handlers to send_mpa_reply/reject()
[linux-2.6-block.git] / drivers / infiniband / hw / cxgb4 / cm.c
CommitLineData
cfdda9d7 1/*
9eccfe10 2 * Copyright (c) 2009-2014 Chelsio, Inc. All rights reserved.
cfdda9d7
SW		 3 *
4 * This software is available to you under a choice of one of two
5 * licenses. You may choose to be licensed under the terms of the GNU
6 * General Public License (GPL) Version 2, available from the file
7 * COPYING in the main directory of this source tree, or the
8 * OpenIB.org BSD license below:
9 *
10 * Redistribution and use in source and binary forms, with or
11 * without modification, are permitted provided that the following
12 * conditions are met:
13 *
14 * - Redistributions of source code must retain the above
15 * copyright notice, this list of conditions and the following
16 * disclaimer.
17 *
18 * - Redistributions in binary form must reproduce the above
19 * copyright notice, this list of conditions and the following
20 * disclaimer in the documentation and/or other materials
21 * provided with the distribution.
22 *
23 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
24 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
25 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
26 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
27 * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
28 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
29 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
30 * SOFTWARE.
31 */
32#include <linux/module.h>
33#include <linux/list.h>
34#include <linux/workqueue.h>
35#include <linux/skbuff.h>
36#include <linux/timer.h>
37#include <linux/notifier.h>
38#include <linux/inetdevice.h>
39#include <linux/ip.h>
40#include <linux/tcp.h>
1cab775c 41#include <linux/if_vlan.h>
cfdda9d7
SW		 42
43#include <net/neighbour.h>
44#include <net/netevent.h>
45#include <net/route.h>
1cab775c 46#include <net/tcp.h>
830662f6
VP		 47#include <net/ip6_route.h>
48#include <net/addrconf.h>
cfdda9d7 49
11b8e22d
SW		 50#include <rdma/ib_addr.h>
51
cfdda9d7 52#include "iw_cxgb4.h"
84cc6ac6 53#include "clip_tbl.h"
cfdda9d7
SW		 54
55static char *states[] = {
56 "idle",
57 "listen",
58 "connecting",
59 "mpa_wait_req",
60 "mpa_req_sent",
61 "mpa_req_rcvd",
62 "mpa_rep_sent",
63 "fpdu_mode",
64 "aborting",
65 "closing",
66 "moribund",
67 "dead",
68 NULL,
69};
70
5be78ee9
VP		 71static int nocong;
72module_param(nocong, int, 0644);
73MODULE_PARM_DESC(nocong, "Turn of congestion control (default=0)");
74
75static int enable_ecn;
76module_param(enable_ecn, int, 0644);
77MODULE_PARM_DESC(enable_ecn, "Enable ECN (default=0/disabled)");
78
b52fe09e 79static int dack_mode = 1;
ba6d3925 80module_param(dack_mode, int, 0644);
b52fe09e 81MODULE_PARM_DESC(dack_mode, "Delayed ack mode (default=1)");
ba6d3925 82
4c2c5763 83uint c4iw_max_read_depth = 32;
be4c9bad 84module_param(c4iw_max_read_depth, int, 0644);
4c2c5763
HS		 85MODULE_PARM_DESC(c4iw_max_read_depth,
86 "Per-connection max ORD/IRD (default=32)");
be4c9bad 87
cfdda9d7
SW		 88static int enable_tcp_timestamps;
89module_param(enable_tcp_timestamps, int, 0644);
90MODULE_PARM_DESC(enable_tcp_timestamps, "Enable tcp timestamps (default=0)");
91
92static int enable_tcp_sack;
93module_param(enable_tcp_sack, int, 0644);
94MODULE_PARM_DESC(enable_tcp_sack, "Enable tcp SACK (default=0)");
95
96static int enable_tcp_window_scaling = 1;
97module_param(enable_tcp_window_scaling, int, 0644);
98MODULE_PARM_DESC(enable_tcp_window_scaling,
99 "Enable tcp window scaling (default=1)");
100
101int c4iw_debug;
102module_param(c4iw_debug, int, 0644);
103MODULE_PARM_DESC(c4iw_debug, "Enable debug logging (default=0)");
104
df2d5130 105static int peer2peer = 1;
cfdda9d7 106module_param(peer2peer, int, 0644);
df2d5130 107MODULE_PARM_DESC(peer2peer, "Support peer2peer ULPs (default=1)");
cfdda9d7
SW		 108
109static int p2p_type = FW_RI_INIT_P2PTYPE_READ_REQ;
110module_param(p2p_type, int, 0644);
111MODULE_PARM_DESC(p2p_type, "RDMAP opcode to use for the RTR message: "
112 "1=RDMA_READ 0=RDMA_WRITE (default 1)");
113
114static int ep_timeout_secs = 60;
115module_param(ep_timeout_secs, int, 0644);
116MODULE_PARM_DESC(ep_timeout_secs, "CM Endpoint operation timeout "
117 "in seconds (default=60)");
118
b8ac3112 119static int mpa_rev = 2;
cfdda9d7
SW		 120module_param(mpa_rev, int, 0644);
121MODULE_PARM_DESC(mpa_rev, "MPA Revision, 0 supports amso1100, "
ccd2c30b 122 "1 is RFC5044 spec compliant, 2 is IETF MPA Peer Connect Draft"
b8ac3112 123 " compliant (default=2)");
cfdda9d7
SW		 124
125static int markers_enabled;
126module_param(markers_enabled, int, 0644);
127MODULE_PARM_DESC(markers_enabled, "Enable MPA MARKERS (default(0)=disabled)");
128
129static int crc_enabled = 1;
130module_param(crc_enabled, int, 0644);
131MODULE_PARM_DESC(crc_enabled, "Enable MPA CRC (default(1)=enabled)");
132
133static int rcv_win = 256 * 1024;
134module_param(rcv_win, int, 0644);
135MODULE_PARM_DESC(rcv_win, "TCP receive window in bytes (default=256KB)");
136
98ae68b7 137static int snd_win = 128 * 1024;
cfdda9d7 138module_param(snd_win, int, 0644);
98ae68b7 139MODULE_PARM_DESC(snd_win, "TCP send window in bytes (default=128KB)");
cfdda9d7 140
cfdda9d7 141static struct workqueue_struct *workq;
cfdda9d7
SW		 142
143static struct sk_buff_head rxq;
cfdda9d7
SW		 144
145static struct sk_buff *get_skb(struct sk_buff *skb, int len, gfp_t gfp);
146static void ep_timeout(unsigned long arg);
147static void connect_reply_upcall(struct c4iw_ep *ep, int status);
9dec900c 148static int sched(struct c4iw_dev *dev, struct sk_buff *skb);
cfdda9d7 149
be4c9bad
RD		 150static LIST_HEAD(timeout_list);
151static spinlock_t timeout_lock;
152
9ca6f7cf
H		 153static void deref_cm_id(struct c4iw_ep_common *epc)
154{
155 epc->cm_id->rem_ref(epc->cm_id);
156 epc->cm_id = NULL;
157 set_bit(CM_ID_DEREFED, &epc->history);
158}
159
160static void ref_cm_id(struct c4iw_ep_common *epc)
161{
162 set_bit(CM_ID_REFED, &epc->history);
163 epc->cm_id->add_ref(epc->cm_id);
164}
165
325abead
VP		 166static void deref_qp(struct c4iw_ep *ep)
167{
168 c4iw_qp_rem_ref(&ep->com.qp->ibqp);
169 clear_bit(QP_REFERENCED, &ep->com.flags);
9ca6f7cf 170 set_bit(QP_DEREFED, &ep->com.history);
325abead
VP		 171}
172
173static void ref_qp(struct c4iw_ep *ep)
174{
175 set_bit(QP_REFERENCED, &ep->com.flags);
9ca6f7cf 176 set_bit(QP_REFED, &ep->com.history);
325abead
VP		 177 c4iw_qp_add_ref(&ep->com.qp->ibqp);
178}
179
cfdda9d7
SW		 180static void start_ep_timer(struct c4iw_ep *ep)
181{
182 PDBG("%s ep %p\n", __func__, ep);
183 if (timer_pending(&ep->timer)) {
1ec779cc
VP		 184 pr_err("%s timer already started! ep %p\n",
185 __func__, ep);
186 return;
187 }
188 clear_bit(TIMEOUT, &ep->com.flags);
189 c4iw_get_ep(&ep->com);
cfdda9d7
SW		 190 ep->timer.expires = jiffies + ep_timeout_secs * HZ;
191 ep->timer.data = (unsigned long)ep;
192 ep->timer.function = ep_timeout;
193 add_timer(&ep->timer);
194}
195
b33bd0cb 196static int stop_ep_timer(struct c4iw_ep *ep)
cfdda9d7 197{
1ec779cc 198 PDBG("%s ep %p stopping\n", __func__, ep);
cfdda9d7 199 del_timer_sync(&ep->timer);
b33bd0cb 200 if (!test_and_set_bit(TIMEOUT, &ep->com.flags)) {
1ec779cc 201 c4iw_put_ep(&ep->com);
b33bd0cb
SW		 202 return 0;
203 }
204 return 1;
cfdda9d7
SW		 205}
206
207static int c4iw_l2t_send(struct c4iw_rdev *rdev, struct sk_buff *skb,
208 struct l2t_entry *l2e)
209{
210 int error = 0;
211
212 if (c4iw_fatal_error(rdev)) {
213 kfree_skb(skb);
214 PDBG("%s - device in error state - dropping\n", __func__);
215 return -EIO;
216 }
217 error = cxgb4_l2t_send(rdev->lldi.ports[0], skb, l2e);
218 if (error < 0)
219 kfree_skb(skb);
caa6c9f2
H		 220 else if (error == NET_XMIT_DROP)
221 return -ENOMEM;
74594861 222 return error < 0 ? error : 0;
cfdda9d7
SW		 223}
224
225int c4iw_ofld_send(struct c4iw_rdev *rdev, struct sk_buff *skb)
226{
227 int error = 0;
228
229 if (c4iw_fatal_error(rdev)) {
230 kfree_skb(skb);
231 PDBG("%s - device in error state - dropping\n", __func__);
232 return -EIO;
233 }
234 error = cxgb4_ofld_send(rdev->lldi.ports[0], skb);
235 if (error < 0)
236 kfree_skb(skb);
74594861 237 return error < 0 ? error : 0;
cfdda9d7
SW		 238}
239
240static void release_tid(struct c4iw_rdev *rdev, u32 hwtid, struct sk_buff *skb)
241{
242 struct cpl_tid_release *req;
243
244 skb = get_skb(skb, sizeof *req, GFP_KERNEL);
245 if (!skb)
246 return;
247 req = (struct cpl_tid_release *) skb_put(skb, sizeof(*req));
248 INIT_TP_WR(req, hwtid);
249 OPCODE_TID(req) = cpu_to_be32(MK_OPCODE_TID(CPL_TID_RELEASE, hwtid));
250 set_wr_txq(skb, CPL_PRIORITY_SETUP, 0);
251 c4iw_ofld_send(rdev, skb);
252 return;
253}
254
255static void set_emss(struct c4iw_ep *ep, u16 opt)
256{
6c53e938 257 ep->emss = ep->com.dev->rdev.lldi.mtus[TCPOPT_MSS_G(opt)] -
04524a47
H		 258 ((AF_INET == ep->com.remote_addr.ss_family) ?
259 sizeof(struct iphdr) : sizeof(struct ipv6hdr)) -
260 sizeof(struct tcphdr);
cfdda9d7 261 ep->mss = ep->emss;
6c53e938 262 if (TCPOPT_TSTAMP_G(opt))
04524a47 263 ep->emss -= round_up(TCPOLEN_TIMESTAMP, 4);
cfdda9d7
SW		 264 if (ep->emss < 128)
265 ep->emss = 128;
92e7ae71
HS		 266 if (ep->emss & 7)
267 PDBG("Warning: misaligned mtu idx %u mss %u emss=%u\n",
6c53e938
HS		 268 TCPOPT_MSS_G(opt), ep->mss, ep->emss);
269 PDBG("%s mss_idx %u mss %u emss=%u\n", __func__, TCPOPT_MSS_G(opt),
cfdda9d7
SW		 270 ep->mss, ep->emss);
271}
272
273static enum c4iw_ep_state state_read(struct c4iw_ep_common *epc)
274{
cfdda9d7
SW		 275 enum c4iw_ep_state state;
276
2f5b48c3 277 mutex_lock(&epc->mutex);
cfdda9d7 278 state = epc->state;
2f5b48c3 279 mutex_unlock(&epc->mutex);
cfdda9d7
SW		 280 return state;
281}
282
283static void __state_set(struct c4iw_ep_common *epc, enum c4iw_ep_state new)
284{
285 epc->state = new;
286}
287
288static void state_set(struct c4iw_ep_common *epc, enum c4iw_ep_state new)
289{
2f5b48c3 290 mutex_lock(&epc->mutex);
cfdda9d7
SW		 291 PDBG("%s - %s -> %s\n", __func__, states[epc->state], states[new]);
292 __state_set(epc, new);
2f5b48c3 293 mutex_unlock(&epc->mutex);
cfdda9d7
SW		 294 return;
295}
296
297static void *alloc_ep(int size, gfp_t gfp)
298{
299 struct c4iw_ep_common *epc;
300
301 epc = kzalloc(size, gfp);
302 if (epc) {
303 kref_init(&epc->kref);
2f5b48c3 304 mutex_init(&epc->mutex);
aadc4df3 305 c4iw_init_wr_wait(&epc->wr_wait);
cfdda9d7
SW		 306 }
307 PDBG("%s alloc ep %p\n", __func__, epc);
308 return epc;
309}
310
944661dd
H		 311static void remove_ep_tid(struct c4iw_ep *ep)
312{
313 unsigned long flags;
314
315 spin_lock_irqsave(&ep->com.dev->lock, flags);
316 _remove_handle(ep->com.dev, &ep->com.dev->hwtid_idr, ep->hwtid, 0);
317 spin_unlock_irqrestore(&ep->com.dev->lock, flags);
318}
319
320static void insert_ep_tid(struct c4iw_ep *ep)
321{
322 unsigned long flags;
323
324 spin_lock_irqsave(&ep->com.dev->lock, flags);
325 _insert_handle(ep->com.dev, &ep->com.dev->hwtid_idr, ep, ep->hwtid, 0);
326 spin_unlock_irqrestore(&ep->com.dev->lock, flags);
327}
328
329/*
330 * Atomically lookup the ep ptr given the tid and grab a reference on the ep.
331 */
332static struct c4iw_ep *get_ep_from_tid(struct c4iw_dev *dev, unsigned int tid)
333{
334 struct c4iw_ep *ep;
335 unsigned long flags;
336
337 spin_lock_irqsave(&dev->lock, flags);
338 ep = idr_find(&dev->hwtid_idr, tid);
339 if (ep)
340 c4iw_get_ep(&ep->com);
341 spin_unlock_irqrestore(&dev->lock, flags);
342 return ep;
343}
344
f86fac79
H		 345/*
346 * Atomically lookup the ep ptr given the stid and grab a reference on the ep.
347 */
348static struct c4iw_listen_ep *get_ep_from_stid(struct c4iw_dev *dev,
349 unsigned int stid)
350{
351 struct c4iw_listen_ep *ep;
352 unsigned long flags;
353
354 spin_lock_irqsave(&dev->lock, flags);
355 ep = idr_find(&dev->stid_idr, stid);
356 if (ep)
357 c4iw_get_ep(&ep->com);
358 spin_unlock_irqrestore(&dev->lock, flags);
359 return ep;
360}
361
cfdda9d7
SW		 362void _c4iw_free_ep(struct kref *kref)
363{
364 struct c4iw_ep *ep;
365
366 ep = container_of(kref, struct c4iw_ep, com.kref);
9dec900c 367 PDBG("%s ep %p state %s\n", __func__, ep, states[ep->com.state]);
325abead
VP		 368 if (test_bit(QP_REFERENCED, &ep->com.flags))
369 deref_qp(ep);
cfdda9d7 370 if (test_bit(RELEASE_RESOURCES, &ep->com.flags)) {
84cc6ac6
H		 371 if (ep->com.remote_addr.ss_family == AF_INET6) {
372 struct sockaddr_in6 *sin6 =
373 (struct sockaddr_in6 *)
170003c8 374 &ep->com.local_addr;
84cc6ac6
H		 375
376 cxgb4_clip_release(
377 ep->com.dev->rdev.lldi.ports[0],
378 (const u32 *)&sin6->sin6_addr.s6_addr,
379 1);
380 }
cfdda9d7
SW		 381 cxgb4_remove_tid(ep->com.dev->rdev.lldi.tids, 0, ep->hwtid);
382 dst_release(ep->dst);
383 cxgb4_l2t_release(ep->l2t);
c878b706
H		 384 if (ep->mpa_skb)
385 kfree_skb(ep->mpa_skb);
cfdda9d7
SW		 386 }
387 kfree(ep);
388}
389
390static void release_ep_resources(struct c4iw_ep *ep)
391{
392 set_bit(RELEASE_RESOURCES, &ep->com.flags);
944661dd
H		 393
394 /*
395 * If we have a hwtid, then remove it from the idr table
396 * so lookups will no longer find this endpoint. Otherwise
397 * we have a race where one thread finds the ep ptr just
398 * before the other thread is freeing the ep memory.
399 */
400 if (ep->hwtid != -1)
401 remove_ep_tid(ep);
cfdda9d7
SW		 402 c4iw_put_ep(&ep->com);
403}
404
cfdda9d7
SW		 405static int status2errno(int status)
406{
407 switch (status) {
408 case CPL_ERR_NONE:
409 return 0;
410 case CPL_ERR_CONN_RESET:
411 return -ECONNRESET;
412 case CPL_ERR_ARP_MISS:
413 return -EHOSTUNREACH;
414 case CPL_ERR_CONN_TIMEDOUT:
415 return -ETIMEDOUT;
416 case CPL_ERR_TCAM_FULL:
417 return -ENOMEM;
418 case CPL_ERR_CONN_EXIST:
419 return -EADDRINUSE;
420 default:
421 return -EIO;
422 }
423}
424
425/*
426 * Try and reuse skbs already allocated...
427 */
428static struct sk_buff *get_skb(struct sk_buff *skb, int len, gfp_t gfp)
429{
430 if (skb && !skb_is_nonlinear(skb) && !skb_cloned(skb)) {
431 skb_trim(skb, 0);
432 skb_get(skb);
433 skb_reset_transport_header(skb);
434 } else {
435 skb = alloc_skb(len, gfp);
436 }
b38a0ad8 437 t4_set_arp_err_handler(skb, NULL, NULL);
cfdda9d7
SW		 438 return skb;
439}
440
830662f6
VP		 441static struct net_device *get_real_dev(struct net_device *egress_dev)
442{
11b8e22d 443 return rdma_vlan_dev_real_dev(egress_dev) ? : egress_dev;
830662f6
VP		 444}
445
446static int our_interface(struct c4iw_dev *dev, struct net_device *egress_dev)
447{
448 int i;
449
450 egress_dev = get_real_dev(egress_dev);
451 for (i = 0; i < dev->rdev.lldi.nports; i++)
452 if (dev->rdev.lldi.ports[i] == egress_dev)
453 return 1;
454 return 0;
455}
456
457static struct dst_entry *find_route6(struct c4iw_dev *dev, __u8 *local_ip,
458 __u8 *peer_ip, __be16 local_port,
459 __be16 peer_port, u8 tos,
460 __u32 sin6_scope_id)
461{
462 struct dst_entry *dst = NULL;
463
464 if (IS_ENABLED(CONFIG_IPV6)) {
465 struct flowi6 fl6;
466
467 memset(&fl6, 0, sizeof(fl6));
468 memcpy(&fl6.daddr, peer_ip, 16);
469 memcpy(&fl6.saddr, local_ip, 16);
470 if (ipv6_addr_type(&fl6.daddr) & IPV6_ADDR_LINKLOCAL)
471 fl6.flowi6_oif = sin6_scope_id;
472 dst = ip6_route_output(&init_net, NULL, &fl6);
473 if (!dst)
474 goto out;
475 if (!our_interface(dev, ip6_dst_idev(dst)->dev) &&
476 !(ip6_dst_idev(dst)->dev->flags & IFF_LOOPBACK)) {
477 dst_release(dst);
478 dst = NULL;
479 }
480 }
481
482out:
483 return dst;
484}
485
486static struct dst_entry *find_route(struct c4iw_dev *dev, __be32 local_ip,
cfdda9d7
SW		 487 __be32 peer_ip, __be16 local_port,
488 __be16 peer_port, u8 tos)
489{
490 struct rtable *rt;
31e4543d 491 struct flowi4 fl4;
830662f6 492 struct neighbour *n;
78fbfd8a 493
31e4543d 494 rt = ip_route_output_ports(&init_net, &fl4, NULL, peer_ip, local_ip,
78fbfd8a
DM		 495 peer_port, local_port, IPPROTO_TCP,
496 tos, 0);
b23dd4fe 497 if (IS_ERR(rt))
cfdda9d7 498 return NULL;
830662f6
VP		 499 n = dst_neigh_lookup(&rt->dst, &peer_ip);
500 if (!n)
501 return NULL;
f8e81908
SW		 502 if (!our_interface(dev, n->dev) &&
503 !(n->dev->flags & IFF_LOOPBACK)) {
d480201b 504 neigh_release(n);
830662f6
VP		 505 dst_release(&rt->dst);
506 return NULL;
507 }
508 neigh_release(n);
509 return &rt->dst;
cfdda9d7
SW		 510}
511
512static void arp_failure_discard(void *handle, struct sk_buff *skb)
513{
9dec900c 514 pr_err(MOD "ARP failure\n");
cfdda9d7
SW		 515 kfree_skb(skb);
516}
517
64bec74a
H		 518static void mpa_start_arp_failure(void *handle, struct sk_buff *skb)
519{
520 pr_err("ARP failure during MPA Negotiation - Closing Connection\n");
521}
522
9dec900c 523enum {
8d1f1a6b 524 NUM_FAKE_CPLS = 2,
9dec900c 525 FAKE_CPL_PUT_EP_SAFE = NUM_CPL_CMDS + 0,
8d1f1a6b 526 FAKE_CPL_PASS_PUT_EP_SAFE = NUM_CPL_CMDS + 1,
9dec900c
H		 527};
528
529static int _put_ep_safe(struct c4iw_dev *dev, struct sk_buff *skb)
530{
531 struct c4iw_ep *ep;
532
533 ep = *((struct c4iw_ep **)(skb->cb + 2 * sizeof(void *)));
534 release_ep_resources(ep);
535 return 0;
536}
537
8d1f1a6b
H		 538static int _put_pass_ep_safe(struct c4iw_dev *dev, struct sk_buff *skb)
539{
540 struct c4iw_ep *ep;
541
542 ep = *((struct c4iw_ep **)(skb->cb + 2 * sizeof(void *)));
543 c4iw_put_ep(&ep->parent_ep->com);
544 release_ep_resources(ep);
545 return 0;
546}
547
9dec900c
H		 548/*
549 * Fake up a special CPL opcode and call sched() so process_work() will call
550 * _put_ep_safe() in a safe context to free the ep resources. This is needed
551 * because ARP error handlers are called in an ATOMIC context, and
552 * _c4iw_free_ep() needs to block.
553 */
8d1f1a6b
H		 554static void queue_arp_failure_cpl(struct c4iw_ep *ep, struct sk_buff *skb,
555 int cpl)
9dec900c
H		 556{
557 struct cpl_act_establish *rpl = cplhdr(skb);
558
559 /* Set our special ARP_FAILURE opcode */
8d1f1a6b 560 rpl->ot.opcode = cpl;
9dec900c
H		 561
562 /*
563 * Save ep in the skb->cb area, after where sched() will save the dev
564 * ptr.
565 */
566 *((struct c4iw_ep **)(skb->cb + 2 * sizeof(void *))) = ep;
567 sched(ep->com.dev, skb);
568}
569
570/* Handle an ARP failure for an accept */
571static void pass_accept_rpl_arp_failure(void *handle, struct sk_buff *skb)
572{
573 struct c4iw_ep *ep = handle;
574
575 pr_err(MOD "ARP failure during accept - tid %u -dropping connection\n",
576 ep->hwtid);
577
578 __state_set(&ep->com, DEAD);
8d1f1a6b 579 queue_arp_failure_cpl(ep, skb, FAKE_CPL_PASS_PUT_EP_SAFE);
9dec900c
H		 580}
581
cfdda9d7
SW		 582/*
583 * Handle an ARP failure for an active open.
584 */
585static void act_open_req_arp_failure(void *handle, struct sk_buff *skb)
586{
5dab6d3a
H		 587 struct c4iw_ep *ep = handle;
588
e3d132d1 589 printk(KERN_ERR MOD "ARP failure during connect\n");
5dab6d3a 590 connect_reply_upcall(ep, -EHOSTUNREACH);
9dec900c 591 __state_set(&ep->com, DEAD);
84cc6ac6
H		 592 if (ep->com.remote_addr.ss_family == AF_INET6) {
593 struct sockaddr_in6 *sin6 =
170003c8 594 (struct sockaddr_in6 *)&ep->com.local_addr;
84cc6ac6
H		 595 cxgb4_clip_release(ep->com.dev->rdev.lldi.ports[0],
596 (const u32 *)&sin6->sin6_addr.s6_addr, 1);
597 }
5dab6d3a
H		 598 remove_handle(ep->com.dev, &ep->com.dev->atid_idr, ep->atid);
599 cxgb4_free_atid(ep->com.dev->rdev.lldi.tids, ep->atid);
8d1f1a6b 600 queue_arp_failure_cpl(ep, skb, FAKE_CPL_PUT_EP_SAFE);
cfdda9d7
SW		 601}
602
603/*
604 * Handle an ARP failure for a CPL_ABORT_REQ. Change it into a no RST variant
605 * and send it along.
606 */
607static void abort_arp_failure(void *handle, struct sk_buff *skb)
608{
761e19a5
H		 609 int ret;
610 struct c4iw_ep *ep = handle;
611 struct c4iw_rdev *rdev = &ep->com.dev->rdev;
cfdda9d7
SW		 612 struct cpl_abort_req *req = cplhdr(skb);
613
614 PDBG("%s rdev %p\n", __func__, rdev);
615 req->cmd = CPL_ABORT_NO_RST;
761e19a5
H		 616 ret = c4iw_ofld_send(rdev, skb);
617 if (ret) {
618 __state_set(&ep->com, DEAD);
619 queue_arp_failure_cpl(ep, skb, FAKE_CPL_PUT_EP_SAFE);
620 }
cfdda9d7
SW		 621}
622
fef4422d 623static int send_flowc(struct c4iw_ep *ep, struct sk_buff *skb)
cfdda9d7
SW		 624{
625 unsigned int flowclen = 80;
626 struct fw_flowc_wr *flowc;
627 int i;
ac8e4c69
H		 628 u16 vlan = ep->l2t->vlan;
629 int nparams;
630
631 if (vlan == CPL_L2T_VLAN_NONE)
632 nparams = 8;
633 else
634 nparams = 9;
cfdda9d7
SW		 635
636 skb = get_skb(skb, flowclen, GFP_KERNEL);
637 flowc = (struct fw_flowc_wr *)__skb_put(skb, flowclen);
638
e2ac9628 639 flowc->op_to_nparams = cpu_to_be32(FW_WR_OP_V(FW_FLOWC_WR) |
ac8e4c69 640 FW_FLOWC_WR_NPARAMS_V(nparams));
e2ac9628
HS		 641 flowc->flowid_len16 = cpu_to_be32(FW_WR_LEN16_V(DIV_ROUND_UP(flowclen,
642 16)) | FW_WR_FLOWID_V(ep->hwtid));
cfdda9d7
SW		 643
644 flowc->mnemval[0].mnemonic = FW_FLOWC_MNEM_PFNVFN;
5167865a 645 flowc->mnemval[0].val = cpu_to_be32(FW_PFVF_CMD_PFN_V
35b1de55 646 (ep->com.dev->rdev.lldi.pf));
cfdda9d7
SW		 647 flowc->mnemval[1].mnemonic = FW_FLOWC_MNEM_CH;
648 flowc->mnemval[1].val = cpu_to_be32(ep->tx_chan);
649 flowc->mnemval[2].mnemonic = FW_FLOWC_MNEM_PORT;
650 flowc->mnemval[2].val = cpu_to_be32(ep->tx_chan);
651 flowc->mnemval[3].mnemonic = FW_FLOWC_MNEM_IQID;
652 flowc->mnemval[3].val = cpu_to_be32(ep->rss_qid);
653 flowc->mnemval[4].mnemonic = FW_FLOWC_MNEM_SNDNXT;
654 flowc->mnemval[4].val = cpu_to_be32(ep->snd_seq);
655 flowc->mnemval[5].mnemonic = FW_FLOWC_MNEM_RCVNXT;
656 flowc->mnemval[5].val = cpu_to_be32(ep->rcv_seq);
657 flowc->mnemval[6].mnemonic = FW_FLOWC_MNEM_SNDBUF;
b408ff28 658 flowc->mnemval[6].val = cpu_to_be32(ep->snd_win);
cfdda9d7
SW		 659 flowc->mnemval[7].mnemonic = FW_FLOWC_MNEM_MSS;
660 flowc->mnemval[7].val = cpu_to_be32(ep->emss);
ac8e4c69
H		 661 if (nparams == 9) {
662 u16 pri;
663
664 pri = (vlan & VLAN_PRIO_MASK) >> VLAN_PRIO_SHIFT;
665 flowc->mnemval[8].mnemonic = FW_FLOWC_MNEM_SCHEDCLASS;
666 flowc->mnemval[8].val = cpu_to_be32(pri);
667 } else {
668 /* Pad WR to 16 byte boundary */
669 flowc->mnemval[8].mnemonic = 0;
670 flowc->mnemval[8].val = 0;
671 }
cfdda9d7
SW		 672 for (i = 0; i < 9; i++) {
673 flowc->mnemval[i].r4[0] = 0;
674 flowc->mnemval[i].r4[1] = 0;
675 flowc->mnemval[i].r4[2] = 0;
676 }
677
678 set_wr_txq(skb, CPL_PRIORITY_DATA, ep->txq_idx);
fef4422d 679 return c4iw_ofld_send(&ep->com.dev->rdev, skb);
cfdda9d7
SW		 680}
681
682static int send_halfclose(struct c4iw_ep *ep, gfp_t gfp)
683{
684 struct cpl_close_con_req *req;
685 struct sk_buff *skb;
686 int wrlen = roundup(sizeof *req, 16);
687
688 PDBG("%s ep %p tid %u\n", __func__, ep, ep->hwtid);
689 skb = get_skb(NULL, wrlen, gfp);
690 if (!skb) {
691 printk(KERN_ERR MOD "%s - failed to alloc skb\n", __func__);
692 return -ENOMEM;
693 }
694 set_wr_txq(skb, CPL_PRIORITY_DATA, ep->txq_idx);
695 t4_set_arp_err_handler(skb, NULL, arp_failure_discard);
696 req = (struct cpl_close_con_req *) skb_put(skb, wrlen);
697 memset(req, 0, wrlen);
698 INIT_TP_WR(req, ep->hwtid);
699 OPCODE_TID(req) = cpu_to_be32(MK_OPCODE_TID(CPL_CLOSE_CON_REQ,
700 ep->hwtid));
701 return c4iw_l2t_send(&ep->com.dev->rdev, skb, ep->l2t);
702}
703
704static int send_abort(struct c4iw_ep *ep, struct sk_buff *skb, gfp_t gfp)
705{
706 struct cpl_abort_req *req;
707 int wrlen = roundup(sizeof *req, 16);
708
709 PDBG("%s ep %p tid %u\n", __func__, ep, ep->hwtid);
710 skb = get_skb(skb, wrlen, gfp);
711 if (!skb) {
712 printk(KERN_ERR MOD "%s - failed to alloc skb.\n",
713 __func__);
714 return -ENOMEM;
715 }
716 set_wr_txq(skb, CPL_PRIORITY_DATA, ep->txq_idx);
761e19a5 717 t4_set_arp_err_handler(skb, ep, abort_arp_failure);
cfdda9d7
SW		 718 req = (struct cpl_abort_req *) skb_put(skb, wrlen);
719 memset(req, 0, wrlen);
720 INIT_TP_WR(req, ep->hwtid);
721 OPCODE_TID(req) = cpu_to_be32(MK_OPCODE_TID(CPL_ABORT_REQ, ep->hwtid));
722 req->cmd = CPL_ABORT_SEND_RST;
723 return c4iw_l2t_send(&ep->com.dev->rdev, skb, ep->l2t);
724}
725
92e7ae71 726static void best_mtu(const unsigned short *mtus, unsigned short mtu,
04524a47 727 unsigned int *idx, int use_ts, int ipv6)
92e7ae71 728{
04524a47
H		 729 unsigned short hdr_size = (ipv6 ?
730 sizeof(struct ipv6hdr) :
731 sizeof(struct iphdr)) +
92e7ae71 732 sizeof(struct tcphdr) +
04524a47
H		 733 (use_ts ?
734 round_up(TCPOLEN_TIMESTAMP, 4) : 0);
92e7ae71
HS		 735 unsigned short data_size = mtu - hdr_size;
736
737 cxgb4_best_aligned_mtu(mtus, hdr_size, data_size, 8, idx);
738}
739
cfdda9d7
SW		 740static int send_connect(struct c4iw_ep *ep)
741{
963cab50
H		 742 struct cpl_act_open_req *req = NULL;
743 struct cpl_t5_act_open_req *t5req = NULL;
744 struct cpl_t6_act_open_req *t6req = NULL;
745 struct cpl_act_open_req6 *req6 = NULL;
746 struct cpl_t5_act_open_req6 *t5req6 = NULL;
747 struct cpl_t6_act_open_req6 *t6req6 = NULL;
cfdda9d7
SW		 748 struct sk_buff *skb;
749 u64 opt0;
750 u32 opt2;
751 unsigned int mtu_idx;
752 int wscale;
963cab50 753 int win, sizev4, sizev6, wrlen;
9eccfe10 754 struct sockaddr_in *la = (struct sockaddr_in *)
170003c8 755 &ep->com.local_addr;
9eccfe10 756 struct sockaddr_in *ra = (struct sockaddr_in *)
170003c8 757 &ep->com.remote_addr;
9eccfe10 758 struct sockaddr_in6 *la6 = (struct sockaddr_in6 *)
170003c8 759 &ep->com.local_addr;
9eccfe10 760 struct sockaddr_in6 *ra6 = (struct sockaddr_in6 *)
170003c8 761 &ep->com.remote_addr;
84cc6ac6 762 int ret;
963cab50
H		 763 enum chip_type adapter_type = ep->com.dev->rdev.lldi.adapter_type;
764 u32 isn = (prandom_u32() & ~7UL) - 1;
765
766 switch (CHELSIO_CHIP_VERSION(adapter_type)) {
767 case CHELSIO_T4:
768 sizev4 = sizeof(struct cpl_act_open_req);
769 sizev6 = sizeof(struct cpl_act_open_req6);
770 break;
771 case CHELSIO_T5:
772 sizev4 = sizeof(struct cpl_t5_act_open_req);
773 sizev6 = sizeof(struct cpl_t5_act_open_req6);
774 break;
775 case CHELSIO_T6:
776 sizev4 = sizeof(struct cpl_t6_act_open_req);
777 sizev6 = sizeof(struct cpl_t6_act_open_req6);
778 break;
779 default:
780 pr_err("T%d Chip is not supported\n",
781 CHELSIO_CHIP_VERSION(adapter_type));
782 return -EINVAL;
783 }
830662f6
VP		 784
785 wrlen = (ep->com.remote_addr.ss_family == AF_INET) ?
786 roundup(sizev4, 16) :
787 roundup(sizev6, 16);
cfdda9d7
SW		 788
789 PDBG("%s ep %p atid %u\n", __func__, ep, ep->atid);
790
791 skb = get_skb(NULL, wrlen, GFP_KERNEL);
792 if (!skb) {
793 printk(KERN_ERR MOD "%s - failed to alloc skb.\n",
794 __func__);
795 return -ENOMEM;
796 }
d4f1a5c6 797 set_wr_txq(skb, CPL_PRIORITY_SETUP, ep->ctrlq_idx);
cfdda9d7 798
92e7ae71 799 best_mtu(ep->com.dev->rdev.lldi.mtus, ep->mtu, &mtu_idx,
04524a47
H		 800 enable_tcp_timestamps,
801 (AF_INET == ep->com.remote_addr.ss_family) ? 0 : 1);
cfdda9d7 802 wscale = compute_wscale(rcv_win);
b408ff28
HS		 803
804 /*
805 * Specify the largest window that will fit in opt0. The
806 * remainder will be specified in the rx_data_ack.
807 */
808 win = ep->rcv_win >> 10;
d7990b0c
AB		 809 if (win > RCV_BUFSIZ_M)
810 win = RCV_BUFSIZ_M;
b408ff28 811
6c53e938 812 opt0 = (nocong ? NO_CONG_F : 0) |
d7990b0c 813 KEEP_ALIVE_F |
6c53e938 814 DELACK_F |
d7990b0c
AB		 815 WND_SCALE_V(wscale) |
816 MSS_IDX_V(mtu_idx) |
817 L2T_IDX_V(ep->l2t->idx) |
818 TX_CHAN_V(ep->tx_chan) |
819 SMAC_SEL_V(ep->smac_idx) |
ac8e4c69 820 DSCP_V(ep->tos >> 2) |
d7990b0c
AB		 821 ULP_MODE_V(ULP_MODE_TCPDDP) |
822 RCV_BUFSIZ_V(win);
823 opt2 = RX_CHANNEL_V(0) |
6c53e938 824 CCTRL_ECN_V(enable_ecn) |
d7990b0c 825 RSS_QUEUE_VALID_F | RSS_QUEUE_V(ep->rss_qid);
cfdda9d7 826 if (enable_tcp_timestamps)
6c53e938 827 opt2 |= TSTAMPS_EN_F;
cfdda9d7 828 if (enable_tcp_sack)
6c53e938 829 opt2 |= SACK_EN_F;
cfdda9d7 830 if (wscale && enable_tcp_window_scaling)
d7990b0c 831 opt2 |= WND_SCALE_EN_F;
963cab50
H		 832 if (CHELSIO_CHIP_VERSION(adapter_type) > CHELSIO_T4) {
833 if (peer2peer)
834 isn += 4;
835
d7990b0c 836 opt2 |= T5_OPT_2_VALID_F;
cf7fe64a 837 opt2 |= CONG_CNTRL_V(CONG_ALG_TAHOE);
0b741047 838 opt2 |= T5_ISS_F;
92e5011a 839 }
84cc6ac6
H		 840
841 if (ep->com.remote_addr.ss_family == AF_INET6)
842 cxgb4_clip_get(ep->com.dev->rdev.lldi.ports[0],
843 (const u32 *)&la6->sin6_addr.s6_addr, 1);
844
5dab6d3a 845 t4_set_arp_err_handler(skb, ep, act_open_req_arp_failure);
cfdda9d7 846
963cab50
H		 847 if (ep->com.remote_addr.ss_family == AF_INET) {
848 switch (CHELSIO_CHIP_VERSION(adapter_type)) {
849 case CHELSIO_T4:
850 req = (struct cpl_act_open_req *)skb_put(skb, wrlen);
830662f6 851 INIT_TP_WR(req, 0);
963cab50
H		 852 break;
853 case CHELSIO_T5:
854 t5req = (struct cpl_t5_act_open_req *)skb_put(skb,
855 wrlen);
856 INIT_TP_WR(t5req, 0);
857 req = (struct cpl_act_open_req *)t5req;
858 break;
859 case CHELSIO_T6:
860 t6req = (struct cpl_t6_act_open_req *)skb_put(skb,
861 wrlen);
862 INIT_TP_WR(t6req, 0);
863 req = (struct cpl_act_open_req *)t6req;
864 t5req = (struct cpl_t5_act_open_req *)t6req;
865 break;
866 default:
867 pr_err("T%d Chip is not supported\n",
868 CHELSIO_CHIP_VERSION(adapter_type));
869 ret = -EINVAL;
870 goto clip_release;
871 }
872
873 OPCODE_TID(req) = cpu_to_be32(MK_OPCODE_TID(CPL_ACT_OPEN_REQ,
874 ((ep->rss_qid<<14) | ep->atid)));
875 req->local_port = la->sin_port;
876 req->peer_port = ra->sin_port;
877 req->local_ip = la->sin_addr.s_addr;
878 req->peer_ip = ra->sin_addr.s_addr;
879 req->opt0 = cpu_to_be64(opt0);
880
881 if (is_t4(ep->com.dev->rdev.lldi.adapter_type)) {
41b4f86c
KS		 882 req->params = cpu_to_be32(cxgb4_select_ntuple(
883 ep->com.dev->rdev.lldi.ports[0],
884 ep->l2t));
830662f6
VP		 885 req->opt2 = cpu_to_be32(opt2);
886 } else {
963cab50
H		 887 t5req->params = cpu_to_be64(FILTER_TUPLE_V(
888 cxgb4_select_ntuple(
889 ep->com.dev->rdev.lldi.ports[0],
890 ep->l2t)));
891 t5req->rsvd = cpu_to_be32(isn);
892 PDBG("%s snd_isn %u\n", __func__, t5req->rsvd);
893 t5req->opt2 = cpu_to_be32(opt2);
894 }
895 } else {
896 switch (CHELSIO_CHIP_VERSION(adapter_type)) {
897 case CHELSIO_T4:
830662f6 898 req6 = (struct cpl_act_open_req6 *)skb_put(skb, wrlen);
830662f6 899 INIT_TP_WR(req6, 0);
963cab50
H		 900 break;
901 case CHELSIO_T5:
902 t5req6 = (struct cpl_t5_act_open_req6 *)skb_put(skb,
903 wrlen);
904 INIT_TP_WR(t5req6, 0);
905 req6 = (struct cpl_act_open_req6 *)t5req6;
906 break;
907 case CHELSIO_T6:
908 t6req6 = (struct cpl_t6_act_open_req6 *)skb_put(skb,
909 wrlen);
910 INIT_TP_WR(t6req6, 0);
911 req6 = (struct cpl_act_open_req6 *)t6req6;
912 t5req6 = (struct cpl_t5_act_open_req6 *)t6req6;
913 break;
914 default:
915 pr_err("T%d Chip is not supported\n",
916 CHELSIO_CHIP_VERSION(adapter_type));
917 ret = -EINVAL;
918 goto clip_release;
919 }
920
921 OPCODE_TID(req6) = cpu_to_be32(MK_OPCODE_TID(CPL_ACT_OPEN_REQ6,
922 ((ep->rss_qid<<14)|ep->atid)));
923 req6->local_port = la6->sin6_port;
924 req6->peer_port = ra6->sin6_port;
925 req6->local_ip_hi = *((__be64 *)(la6->sin6_addr.s6_addr));
926 req6->local_ip_lo = *((__be64 *)(la6->sin6_addr.s6_addr + 8));
927 req6->peer_ip_hi = *((__be64 *)(ra6->sin6_addr.s6_addr));
928 req6->peer_ip_lo = *((__be64 *)(ra6->sin6_addr.s6_addr + 8));
929 req6->opt0 = cpu_to_be64(opt0);
930
931 if (is_t4(ep->com.dev->rdev.lldi.adapter_type)) {
41b4f86c
KS		 932 req6->params = cpu_to_be32(cxgb4_select_ntuple(
933 ep->com.dev->rdev.lldi.ports[0],
934 ep->l2t));
830662f6 935 req6->opt2 = cpu_to_be32(opt2);
830662f6 936 } else {
963cab50
H		 937 t5req6->params = cpu_to_be64(FILTER_TUPLE_V(
938 cxgb4_select_ntuple(
41b4f86c 939 ep->com.dev->rdev.lldi.ports[0],
da22b896 940 ep->l2t)));
963cab50
H		 941 t5req6->rsvd = cpu_to_be32(isn);
942 PDBG("%s snd_isn %u\n", __func__, t5req6->rsvd);
943 t5req6->opt2 = cpu_to_be32(opt2);
830662f6 944 }
f079af7a
VP		 945 }
946
793dad94 947 set_bit(ACT_OPEN_REQ, &ep->com.history);
84cc6ac6 948 ret = c4iw_l2t_send(&ep->com.dev->rdev, skb, ep->l2t);
963cab50 949clip_release:
84cc6ac6
H		 950 if (ret && ep->com.remote_addr.ss_family == AF_INET6)
951 cxgb4_clip_release(ep->com.dev->rdev.lldi.ports[0],
952 (const u32 *)&la6->sin6_addr.s6_addr, 1);
953 return ret;
cfdda9d7
SW		 954}
955
caa6c9f2
H		 956static int send_mpa_req(struct c4iw_ep *ep, struct sk_buff *skb,
957 u8 mpa_rev_to_use)
cfdda9d7 958{
caa6c9f2 959 int mpalen, wrlen, ret;
cfdda9d7
SW		 960 struct fw_ofld_tx_data_wr *req;
961 struct mpa_message *mpa;
d2fe99e8 962 struct mpa_v2_conn_params mpa_v2_params;
cfdda9d7
SW		 963
964 PDBG("%s ep %p tid %u pd_len %d\n", __func__, ep, ep->hwtid, ep->plen);
965
966 BUG_ON(skb_cloned(skb));
967
968 mpalen = sizeof(*mpa) + ep->plen;
d2fe99e8
KS		 969 if (mpa_rev_to_use == 2)
970 mpalen += sizeof(struct mpa_v2_conn_params);
cfdda9d7
SW		 971 wrlen = roundup(mpalen + sizeof *req, 16);
972 skb = get_skb(skb, wrlen, GFP_KERNEL);
973 if (!skb) {
974 connect_reply_upcall(ep, -ENOMEM);
caa6c9f2 975 return -ENOMEM;
cfdda9d7
SW		 976 }
977 set_wr_txq(skb, CPL_PRIORITY_DATA, ep->txq_idx);
978
979 req = (struct fw_ofld_tx_data_wr *)skb_put(skb, wrlen);
980 memset(req, 0, wrlen);
981 req->op_to_immdlen = cpu_to_be32(
e2ac9628
HS		 982 FW_WR_OP_V(FW_OFLD_TX_DATA_WR) |
983 FW_WR_COMPL_F |
984 FW_WR_IMMDLEN_V(mpalen));
cfdda9d7 985 req->flowid_len16 = cpu_to_be32(
e2ac9628
HS		 986 FW_WR_FLOWID_V(ep->hwtid) |
987 FW_WR_LEN16_V(wrlen >> 4));
cfdda9d7
SW		 988 req->plen = cpu_to_be32(mpalen);
989 req->tunnel_to_proxy = cpu_to_be32(
e2ac9628
HS		 990 FW_OFLD_TX_DATA_WR_FLUSH_F |
991 FW_OFLD_TX_DATA_WR_SHOVE_F);
cfdda9d7
SW		 992
993 mpa = (struct mpa_message *)(req + 1);
994 memcpy(mpa->key, MPA_KEY_REQ, sizeof(mpa->key));
995 mpa->flags = (crc_enabled ? MPA_CRC : 0) |
d2fe99e8
KS		 996 (markers_enabled ? MPA_MARKERS : 0) |
997 (mpa_rev_to_use == 2 ? MPA_ENHANCED_RDMA_CONN : 0);
cfdda9d7 998 mpa->private_data_size = htons(ep->plen);
d2fe99e8 999 mpa->revision = mpa_rev_to_use;
01b225e1 1000 if (mpa_rev_to_use == 1) {
d2fe99e8 1001 ep->tried_with_mpa_v1 = 1;
01b225e1
KS		 1002 ep->retry_with_mpa_v1 = 0;
1003 }
d2fe99e8
KS		 1004
1005 if (mpa_rev_to_use == 2) {
f747c34a
RD		 1006 mpa->private_data_size = htons(ntohs(mpa->private_data_size) +
1007 sizeof (struct mpa_v2_conn_params));
4c2c5763
HS		 1008 PDBG("%s initiator ird %u ord %u\n", __func__, ep->ird,
1009 ep->ord);
d2fe99e8
KS		 1010 mpa_v2_params.ird = htons((u16)ep->ird);
1011 mpa_v2_params.ord = htons((u16)ep->ord);
1012
1013 if (peer2peer) {
1014 mpa_v2_params.ird |= htons(MPA_V2_PEER2PEER_MODEL);
1015 if (p2p_type == FW_RI_INIT_P2PTYPE_RDMA_WRITE)
1016 mpa_v2_params.ord |=
1017 htons(MPA_V2_RDMA_WRITE_RTR);
1018 else if (p2p_type == FW_RI_INIT_P2PTYPE_READ_REQ)
1019 mpa_v2_params.ord |=
1020 htons(MPA_V2_RDMA_READ_RTR);
1021 }
1022 memcpy(mpa->private_data, &mpa_v2_params,
1023 sizeof(struct mpa_v2_conn_params));
cfdda9d7 1024
d2fe99e8
KS		 1025 if (ep->plen)
1026 memcpy(mpa->private_data +
1027 sizeof(struct mpa_v2_conn_params),
1028 ep->mpa_pkt + sizeof(*mpa), ep->plen);
1029 } else
1030 if (ep->plen)
1031 memcpy(mpa->private_data,
1032 ep->mpa_pkt + sizeof(*mpa), ep->plen);
cfdda9d7
SW		 1033
1034 /*
1035 * Reference the mpa skb. This ensures the data area
1036 * will remain in memory until the hw acks the tx.
1037 * Function fw4_ack() will deref it.
1038 */
1039 skb_get(skb);
1040 t4_set_arp_err_handler(skb, NULL, arp_failure_discard);
1041 BUG_ON(ep->mpa_skb);
1042 ep->mpa_skb = skb;
caa6c9f2
H		 1043 ret = c4iw_l2t_send(&ep->com.dev->rdev, skb, ep->l2t);
1044 if (ret)
1045 return ret;
cfdda9d7 1046 start_ep_timer(ep);
a7db89eb 1047 __state_set(&ep->com, MPA_REQ_SENT);
cfdda9d7 1048 ep->mpa_attr.initiator = 1;
9c88aa00 1049 ep->snd_seq += mpalen;
caa6c9f2 1050 return ret;
cfdda9d7
SW		 1051}
1052
1053static int send_mpa_reject(struct c4iw_ep *ep, const void *pdata, u8 plen)
1054{
1055 int mpalen, wrlen;
1056 struct fw_ofld_tx_data_wr *req;
1057 struct mpa_message *mpa;
1058 struct sk_buff *skb;
d2fe99e8 1059 struct mpa_v2_conn_params mpa_v2_params;
cfdda9d7
SW		 1060
1061 PDBG("%s ep %p tid %u pd_len %d\n", __func__, ep, ep->hwtid, ep->plen);
1062
1063 mpalen = sizeof(*mpa) + plen;
d2fe99e8
KS		 1064 if (ep->mpa_attr.version == 2 && ep->mpa_attr.enhanced_rdma_conn)
1065 mpalen += sizeof(struct mpa_v2_conn_params);
cfdda9d7
SW		 1066 wrlen = roundup(mpalen + sizeof *req, 16);
1067
1068 skb = get_skb(NULL, wrlen, GFP_KERNEL);
1069 if (!skb) {
1070 printk(KERN_ERR MOD "%s - cannot alloc skb!\n", __func__);
1071 return -ENOMEM;
1072 }
1073 set_wr_txq(skb, CPL_PRIORITY_DATA, ep->txq_idx);
1074
1075 req = (struct fw_ofld_tx_data_wr *)skb_put(skb, wrlen);
1076 memset(req, 0, wrlen);
1077 req->op_to_immdlen = cpu_to_be32(
e2ac9628
HS		 1078 FW_WR_OP_V(FW_OFLD_TX_DATA_WR) |
1079 FW_WR_COMPL_F |
1080 FW_WR_IMMDLEN_V(mpalen));
cfdda9d7 1081 req->flowid_len16 = cpu_to_be32(
e2ac9628
HS		 1082 FW_WR_FLOWID_V(ep->hwtid) |
1083 FW_WR_LEN16_V(wrlen >> 4));
cfdda9d7
SW		 1084 req->plen = cpu_to_be32(mpalen);
1085 req->tunnel_to_proxy = cpu_to_be32(
e2ac9628
HS		 1086 FW_OFLD_TX_DATA_WR_FLUSH_F |
1087 FW_OFLD_TX_DATA_WR_SHOVE_F);
cfdda9d7
SW		 1088
1089 mpa = (struct mpa_message *)(req + 1);
1090 memset(mpa, 0, sizeof(*mpa));
1091 memcpy(mpa->key, MPA_KEY_REP, sizeof(mpa->key));
1092 mpa->flags = MPA_REJECT;
fe7e0a4d 1093 mpa->revision = ep->mpa_attr.version;
cfdda9d7 1094 mpa->private_data_size = htons(plen);
d2fe99e8
KS		 1095
1096 if (ep->mpa_attr.version == 2 && ep->mpa_attr.enhanced_rdma_conn) {
1097 mpa->flags |= MPA_ENHANCED_RDMA_CONN;
f747c34a
RD		 1098 mpa->private_data_size = htons(ntohs(mpa->private_data_size) +
1099 sizeof (struct mpa_v2_conn_params));
d2fe99e8
KS		 1100 mpa_v2_params.ird = htons(((u16)ep->ird) |
1101 (peer2peer ? MPA_V2_PEER2PEER_MODEL :
1102 0));
1103 mpa_v2_params.ord = htons(((u16)ep->ord) | (peer2peer ?
1104 (p2p_type ==
1105 FW_RI_INIT_P2PTYPE_RDMA_WRITE ?
1106 MPA_V2_RDMA_WRITE_RTR : p2p_type ==
1107 FW_RI_INIT_P2PTYPE_READ_REQ ?
1108 MPA_V2_RDMA_READ_RTR : 0) : 0));
1109 memcpy(mpa->private_data, &mpa_v2_params,
1110 sizeof(struct mpa_v2_conn_params));
1111
1112 if (ep->plen)
1113 memcpy(mpa->private_data +
1114 sizeof(struct mpa_v2_conn_params), pdata, plen);
1115 } else
1116 if (plen)
1117 memcpy(mpa->private_data, pdata, plen);
cfdda9d7
SW		 1118
1119 /*
1120 * Reference the mpa skb again. This ensures the data area
1121 * will remain in memory until the hw acks the tx.
1122 * Function fw4_ack() will deref it.
1123 */
1124 skb_get(skb);
1125 set_wr_txq(skb, CPL_PRIORITY_DATA, ep->txq_idx);
64bec74a 1126 t4_set_arp_err_handler(skb, NULL, mpa_start_arp_failure);
cfdda9d7
SW		 1127 BUG_ON(ep->mpa_skb);
1128 ep->mpa_skb = skb;
9c88aa00 1129 ep->snd_seq += mpalen;
cfdda9d7
SW		 1130 return c4iw_l2t_send(&ep->com.dev->rdev, skb, ep->l2t);
1131}
1132
1133static int send_mpa_reply(struct c4iw_ep *ep, const void *pdata, u8 plen)
1134{
1135 int mpalen, wrlen;
1136 struct fw_ofld_tx_data_wr *req;
1137 struct mpa_message *mpa;
1138 struct sk_buff *skb;
d2fe99e8 1139 struct mpa_v2_conn_params mpa_v2_params;
cfdda9d7
SW		 1140
1141 PDBG("%s ep %p tid %u pd_len %d\n", __func__, ep, ep->hwtid, ep->plen);
1142
1143 mpalen = sizeof(*mpa) + plen;
d2fe99e8
KS		 1144 if (ep->mpa_attr.version == 2 && ep->mpa_attr.enhanced_rdma_conn)
1145 mpalen += sizeof(struct mpa_v2_conn_params);
cfdda9d7
SW		 1146 wrlen = roundup(mpalen + sizeof *req, 16);
1147
1148 skb = get_skb(NULL, wrlen, GFP_KERNEL);
1149 if (!skb) {
1150 printk(KERN_ERR MOD "%s - cannot alloc skb!\n", __func__);
1151 return -ENOMEM;
1152 }
1153 set_wr_txq(skb, CPL_PRIORITY_DATA, ep->txq_idx);
1154
1155 req = (struct fw_ofld_tx_data_wr *) skb_put(skb, wrlen);
1156 memset(req, 0, wrlen);
1157 req->op_to_immdlen = cpu_to_be32(
e2ac9628
HS		 1158 FW_WR_OP_V(FW_OFLD_TX_DATA_WR) |
1159 FW_WR_COMPL_F |
1160 FW_WR_IMMDLEN_V(mpalen));
cfdda9d7 1161 req->flowid_len16 = cpu_to_be32(
e2ac9628
HS		 1162 FW_WR_FLOWID_V(ep->hwtid) |
1163 FW_WR_LEN16_V(wrlen >> 4));
cfdda9d7
SW		 1164 req->plen = cpu_to_be32(mpalen);
1165 req->tunnel_to_proxy = cpu_to_be32(
e2ac9628
HS		 1166 FW_OFLD_TX_DATA_WR_FLUSH_F |
1167 FW_OFLD_TX_DATA_WR_SHOVE_F);
cfdda9d7
SW		 1168
1169 mpa = (struct mpa_message *)(req + 1);
1170 memset(mpa, 0, sizeof(*mpa));
1171 memcpy(mpa->key, MPA_KEY_REP, sizeof(mpa->key));
1172 mpa->flags = (ep->mpa_attr.crc_enabled ? MPA_CRC : 0) |
1173 (markers_enabled ? MPA_MARKERS : 0);
d2fe99e8 1174 mpa->revision = ep->mpa_attr.version;
cfdda9d7 1175 mpa->private_data_size = htons(plen);
d2fe99e8
KS		 1176
1177 if (ep->mpa_attr.version == 2 && ep->mpa_attr.enhanced_rdma_conn) {
1178 mpa->flags |= MPA_ENHANCED_RDMA_CONN;
f747c34a
RD		 1179 mpa->private_data_size = htons(ntohs(mpa->private_data_size) +
1180 sizeof (struct mpa_v2_conn_params));
d2fe99e8
KS		 1181 mpa_v2_params.ird = htons((u16)ep->ird);
1182 mpa_v2_params.ord = htons((u16)ep->ord);
1183 if (peer2peer && (ep->mpa_attr.p2p_type !=
1184 FW_RI_INIT_P2PTYPE_DISABLED)) {
1185 mpa_v2_params.ird |= htons(MPA_V2_PEER2PEER_MODEL);
1186
1187 if (p2p_type == FW_RI_INIT_P2PTYPE_RDMA_WRITE)
1188 mpa_v2_params.ord |=
1189 htons(MPA_V2_RDMA_WRITE_RTR);
1190 else if (p2p_type == FW_RI_INIT_P2PTYPE_READ_REQ)
1191 mpa_v2_params.ord |=
1192 htons(MPA_V2_RDMA_READ_RTR);
1193 }
1194
1195 memcpy(mpa->private_data, &mpa_v2_params,
1196 sizeof(struct mpa_v2_conn_params));
1197
1198 if (ep->plen)
1199 memcpy(mpa->private_data +
1200 sizeof(struct mpa_v2_conn_params), pdata, plen);
1201 } else
1202 if (plen)
1203 memcpy(mpa->private_data, pdata, plen);
cfdda9d7
SW		 1204
1205 /*
1206 * Reference the mpa skb. This ensures the data area
1207 * will remain in memory until the hw acks the tx.
1208 * Function fw4_ack() will deref it.
1209 */
1210 skb_get(skb);
64bec74a 1211 t4_set_arp_err_handler(skb, NULL, mpa_start_arp_failure);
cfdda9d7 1212 ep->mpa_skb = skb;
a7db89eb 1213 __state_set(&ep->com, MPA_REP_SENT);
9c88aa00 1214 ep->snd_seq += mpalen;
cfdda9d7
SW		 1215 return c4iw_l2t_send(&ep->com.dev->rdev, skb, ep->l2t);
1216}
1217
1218static int act_establish(struct c4iw_dev *dev, struct sk_buff *skb)
1219{
1220 struct c4iw_ep *ep;
1221 struct cpl_act_establish *req = cplhdr(skb);
1222 unsigned int tid = GET_TID(req);
6c53e938 1223 unsigned int atid = TID_TID_G(ntohl(req->tos_atid));
cfdda9d7 1224 struct tid_info *t = dev->rdev.lldi.tids;
fef4422d 1225 int ret;
cfdda9d7
SW		 1226
1227 ep = lookup_atid(t, atid);
1228
1229 PDBG("%s ep %p tid %u snd_isn %u rcv_isn %u\n", __func__, ep, tid,
1230 be32_to_cpu(req->snd_isn), be32_to_cpu(req->rcv_isn));
1231
a7db89eb 1232 mutex_lock(&ep->com.mutex);
cfdda9d7
SW		 1233 dst_confirm(ep->dst);
1234
1235 /* setup the hwtid for this connection */
1236 ep->hwtid = tid;
1237 cxgb4_insert_tid(t, ep, tid);
944661dd 1238 insert_ep_tid(ep);
cfdda9d7
SW		 1239
1240 ep->snd_seq = be32_to_cpu(req->snd_isn);
1241 ep->rcv_seq = be32_to_cpu(req->rcv_isn);
1242
1243 set_emss(ep, ntohs(req->tcp_opt));
1244
1245 /* dealloc the atid */
793dad94 1246 remove_handle(ep->com.dev, &ep->com.dev->atid_idr, atid);
cfdda9d7 1247 cxgb4_free_atid(t, atid);
793dad94 1248 set_bit(ACT_ESTAB, &ep->com.history);
cfdda9d7
SW		 1249
1250 /* start MPA negotiation */
fef4422d
H		 1251 ret = send_flowc(ep, NULL);
1252 if (ret)
1253 goto err;
d2fe99e8 1254 if (ep->retry_with_mpa_v1)
caa6c9f2 1255 ret = send_mpa_req(ep, skb, 1);
d2fe99e8 1256 else
caa6c9f2
H		 1257 ret = send_mpa_req(ep, skb, mpa_rev);
1258 if (ret)
1259 goto err;
a7db89eb 1260 mutex_unlock(&ep->com.mutex);
cfdda9d7 1261 return 0;
fef4422d
H		 1262err:
1263 mutex_unlock(&ep->com.mutex);
1264 connect_reply_upcall(ep, -ENOMEM);
1265 c4iw_ep_disconnect(ep, 0, GFP_KERNEL);
1266 return 0;
cfdda9d7
SW		 1267}
1268
be13b2df 1269static void close_complete_upcall(struct c4iw_ep *ep, int status)
cfdda9d7
SW		 1270{
1271 struct iw_cm_event event;
1272
1273 PDBG("%s ep %p tid %u\n", __func__, ep, ep->hwtid);
1274 memset(&event, 0, sizeof(event));
1275 event.event = IW_CM_EVENT_CLOSE;
be13b2df 1276 event.status = status;
cfdda9d7
SW		 1277 if (ep->com.cm_id) {
1278 PDBG("close complete delivered ep %p cm_id %p tid %u\n",
1279 ep, ep->com.cm_id, ep->hwtid);
1280 ep->com.cm_id->event_handler(ep->com.cm_id, &event);
9ca6f7cf 1281 deref_cm_id(&ep->com);
793dad94 1282 set_bit(CLOSE_UPCALL, &ep->com.history);
cfdda9d7
SW		 1283 }
1284}
1285
cfdda9d7
SW		 1286static void peer_close_upcall(struct c4iw_ep *ep)
1287{
1288 struct iw_cm_event event;
1289
1290 PDBG("%s ep %p tid %u\n", __func__, ep, ep->hwtid);
1291 memset(&event, 0, sizeof(event));
1292 event.event = IW_CM_EVENT_DISCONNECT;
1293 if (ep->com.cm_id) {
1294 PDBG("peer close delivered ep %p cm_id %p tid %u\n",
1295 ep, ep->com.cm_id, ep->hwtid);
1296 ep->com.cm_id->event_handler(ep->com.cm_id, &event);
793dad94 1297 set_bit(DISCONN_UPCALL, &ep->com.history);
cfdda9d7
SW		 1298 }
1299}
1300
1301static void peer_abort_upcall(struct c4iw_ep *ep)
1302{
1303 struct iw_cm_event event;
1304
1305 PDBG("%s ep %p tid %u\n", __func__, ep, ep->hwtid);
1306 memset(&event, 0, sizeof(event));
1307 event.event = IW_CM_EVENT_CLOSE;
1308 event.status = -ECONNRESET;
1309 if (ep->com.cm_id) {
1310 PDBG("abort delivered ep %p cm_id %p tid %u\n", ep,
1311 ep->com.cm_id, ep->hwtid);
1312 ep->com.cm_id->event_handler(ep->com.cm_id, &event);
9ca6f7cf 1313 deref_cm_id(&ep->com);
793dad94 1314 set_bit(ABORT_UPCALL, &ep->com.history);
cfdda9d7
SW		 1315 }
1316}
1317
1318static void connect_reply_upcall(struct c4iw_ep *ep, int status)
1319{
1320 struct iw_cm_event event;
1321
1322 PDBG("%s ep %p tid %u status %d\n", __func__, ep, ep->hwtid, status);
1323 memset(&event, 0, sizeof(event));
1324 event.event = IW_CM_EVENT_CONNECT_REPLY;
1325 event.status = status;
24d44a39
SW		 1326 memcpy(&event.local_addr, &ep->com.local_addr,
1327 sizeof(ep->com.local_addr));
1328 memcpy(&event.remote_addr, &ep->com.remote_addr,
1329 sizeof(ep->com.remote_addr));
cfdda9d7
SW		 1330
1331 if ((status == 0) || (status == -ECONNREFUSED)) {
d2fe99e8
KS		 1332 if (!ep->tried_with_mpa_v1) {
1333 /* this means MPA_v2 is used */
158c776d
H		 1334 event.ord = ep->ird;
1335 event.ird = ep->ord;
d2fe99e8
KS		 1336 event.private_data_len = ep->plen -
1337 sizeof(struct mpa_v2_conn_params);
1338 event.private_data = ep->mpa_pkt +
1339 sizeof(struct mpa_message) +
1340 sizeof(struct mpa_v2_conn_params);
1341 } else {
1342 /* this means MPA_v1 is used */
158c776d
H		 1343 event.ord = cur_max_read_depth(ep->com.dev);
1344 event.ird = cur_max_read_depth(ep->com.dev);
d2fe99e8
KS		 1345 event.private_data_len = ep->plen;
1346 event.private_data = ep->mpa_pkt +
1347 sizeof(struct mpa_message);
1348 }
cfdda9d7 1349 }
85963e4c
RD		 1350
1351 PDBG("%s ep %p tid %u status %d\n", __func__, ep,
1352 ep->hwtid, status);
793dad94 1353 set_bit(CONN_RPL_UPCALL, &ep->com.history);
85963e4c
RD		 1354 ep->com.cm_id->event_handler(ep->com.cm_id, &event);
1355
9ca6f7cf
H		 1356 if (status < 0)
1357 deref_cm_id(&ep->com);
cfdda9d7
SW		 1358}
1359
be13b2df 1360static int connect_request_upcall(struct c4iw_ep *ep)
cfdda9d7
SW		 1361{
1362 struct iw_cm_event event;
be13b2df 1363 int ret;
cfdda9d7
SW		 1364
1365 PDBG("%s ep %p tid %u\n", __func__, ep, ep->hwtid);
1366 memset(&event, 0, sizeof(event));
1367 event.event = IW_CM_EVENT_CONNECT_REQUEST;
24d44a39
SW		 1368 memcpy(&event.local_addr, &ep->com.local_addr,
1369 sizeof(ep->com.local_addr));
1370 memcpy(&event.remote_addr, &ep->com.remote_addr,
1371 sizeof(ep->com.remote_addr));
cfdda9d7 1372 event.provider_data = ep;
d2fe99e8
KS		 1373 if (!ep->tried_with_mpa_v1) {
1374 /* this means MPA_v2 is used */
1375 event.ord = ep->ord;
1376 event.ird = ep->ird;
1377 event.private_data_len = ep->plen -
1378 sizeof(struct mpa_v2_conn_params);
1379 event.private_data = ep->mpa_pkt + sizeof(struct mpa_message) +
1380 sizeof(struct mpa_v2_conn_params);
1381 } else {
1382 /* this means MPA_v1 is used. Send max supported */
4c2c5763
HS		 1383 event.ord = cur_max_read_depth(ep->com.dev);
1384 event.ird = cur_max_read_depth(ep->com.dev);
d2fe99e8
KS		 1385 event.private_data_len = ep->plen;
1386 event.private_data = ep->mpa_pkt + sizeof(struct mpa_message);
1387 }
be13b2df
SW		 1388 c4iw_get_ep(&ep->com);
1389 ret = ep->parent_ep->com.cm_id->event_handler(ep->parent_ep->com.cm_id,
1390 &event);
1391 if (ret)
1392 c4iw_put_ep(&ep->com);
793dad94 1393 set_bit(CONNREQ_UPCALL, &ep->com.history);
cfdda9d7 1394 c4iw_put_ep(&ep->parent_ep->com);
be13b2df 1395 return ret;
cfdda9d7
SW		 1396}
1397
1398static void established_upcall(struct c4iw_ep *ep)
1399{
1400 struct iw_cm_event event;
1401
1402 PDBG("%s ep %p tid %u\n", __func__, ep, ep->hwtid);
1403 memset(&event, 0, sizeof(event));
1404 event.event = IW_CM_EVENT_ESTABLISHED;
3dd9a5dc
H		 1405 event.ird = ep->ord;
1406 event.ord = ep->ird;
cfdda9d7
SW		 1407 if (ep->com.cm_id) {
1408 PDBG("%s ep %p tid %u\n", __func__, ep, ep->hwtid);
1409 ep->com.cm_id->event_handler(ep->com.cm_id, &event);
793dad94 1410 set_bit(ESTAB_UPCALL, &ep->com.history);
cfdda9d7
SW		 1411 }
1412}
1413
1414static int update_rx_credits(struct c4iw_ep *ep, u32 credits)
1415{
1416 struct cpl_rx_data_ack *req;
1417 struct sk_buff *skb;
1418 int wrlen = roundup(sizeof *req, 16);
1419
1420 PDBG("%s ep %p tid %u credits %u\n", __func__, ep, ep->hwtid, credits);
1421 skb = get_skb(NULL, wrlen, GFP_KERNEL);
1422 if (!skb) {
1423 printk(KERN_ERR MOD "update_rx_credits - cannot alloc skb!\n");
1424 return 0;
1425 }
1426
b408ff28
HS		 1427 /*
1428 * If we couldn't specify the entire rcv window at connection setup
1429 * due to the limit in the number of bits in the RCV_BUFSIZ field,
1430 * then add the overage in to the credits returned.
1431 */
d7990b0c
AB		 1432 if (ep->rcv_win > RCV_BUFSIZ_M * 1024)
1433 credits += ep->rcv_win - RCV_BUFSIZ_M * 1024;
b408ff28 1434
cfdda9d7
SW		 1435 req = (struct cpl_rx_data_ack *) skb_put(skb, wrlen);
1436 memset(req, 0, wrlen);
1437 INIT_TP_WR(req, ep->hwtid);
1438 OPCODE_TID(req) = cpu_to_be32(MK_OPCODE_TID(CPL_RX_DATA_ACK,
1439 ep->hwtid));
d7990b0c 1440 req->credit_dack = cpu_to_be32(credits | RX_FORCE_ACK_F |
cf7fe64a
HS		 1441 RX_DACK_CHANGE_F |
1442 RX_DACK_MODE_V(dack_mode));
d4f1a5c6 1443 set_wr_txq(skb, CPL_PRIORITY_ACK, ep->ctrlq_idx);
cfdda9d7
SW		 1444 c4iw_ofld_send(&ep->com.dev->rdev, skb);
1445 return credits;
1446}
1447
4c2c5763
HS		 1448#define RELAXED_IRD_NEGOTIATION 1
1449
f8e1e1d1
H		 1450/*
1451 * process_mpa_reply - process streaming mode MPA reply
1452 *
1453 * Returns:
1454 *
1455 * 0 upon success indicating a connect request was delivered to the ULP
1456 * or the mpa request is incomplete but valid so far.
1457 *
1458 * 1 if a failure requires the caller to close the connection.
1459 *
1460 * 2 if a failure requires the caller to abort the connection.
1461 */
cc18b939 1462static int process_mpa_reply(struct c4iw_ep *ep, struct sk_buff *skb)
cfdda9d7
SW		 1463{
1464 struct mpa_message *mpa;
d2fe99e8 1465 struct mpa_v2_conn_params *mpa_v2_params;
cfdda9d7 1466 u16 plen;
d2fe99e8
KS		 1467 u16 resp_ird, resp_ord;
1468 u8 rtr_mismatch = 0, insuff_ird = 0;
cfdda9d7
SW		 1469 struct c4iw_qp_attributes attrs;
1470 enum c4iw_qp_attr_mask mask;
1471 int err;
cc18b939 1472 int disconnect = 0;
cfdda9d7
SW		 1473
1474 PDBG("%s ep %p tid %u\n", __func__, ep, ep->hwtid);
1475
cfdda9d7
SW		 1476 /*
1477 * If we get more than the supported amount of private data
1478 * then we must fail this connection.
1479 */
1480 if (ep->mpa_pkt_len + skb->len > sizeof(ep->mpa_pkt)) {
1481 err = -EINVAL;
da1cecdf 1482 goto err_stop_timer;
cfdda9d7
SW		 1483 }
1484
1485 /*
1486 * copy the new data into our accumulation buffer.
1487 */
1488 skb_copy_from_linear_data(skb, &(ep->mpa_pkt[ep->mpa_pkt_len]),
1489 skb->len);
1490 ep->mpa_pkt_len += skb->len;
1491
1492 /*
1493 * if we don't even have the mpa message, then bail.
1494 */
1495 if (ep->mpa_pkt_len < sizeof(*mpa))
cc18b939 1496 return 0;
cfdda9d7
SW		 1497 mpa = (struct mpa_message *) ep->mpa_pkt;
1498
1499 /* Validate MPA header. */
d2fe99e8
KS		 1500 if (mpa->revision > mpa_rev) {
1501 printk(KERN_ERR MOD "%s MPA version mismatch. Local = %d,"
1502 " Received = %d\n", __func__, mpa_rev, mpa->revision);
cfdda9d7 1503 err = -EPROTO;
da1cecdf 1504 goto err_stop_timer;
cfdda9d7
SW		 1505 }
1506 if (memcmp(mpa->key, MPA_KEY_REP, sizeof(mpa->key))) {
1507 err = -EPROTO;
da1cecdf 1508 goto err_stop_timer;
cfdda9d7
SW		 1509 }
1510
1511 plen = ntohs(mpa->private_data_size);
1512
1513 /*
1514 * Fail if there's too much private data.
1515 */
1516 if (plen > MPA_MAX_PRIVATE_DATA) {
1517 err = -EPROTO;
da1cecdf 1518 goto err_stop_timer;
cfdda9d7
SW		 1519 }
1520
1521 /*
1522 * If plen does not account for pkt size
1523 */
1524 if (ep->mpa_pkt_len > (sizeof(*mpa) + plen)) {
1525 err = -EPROTO;
da1cecdf 1526 goto err_stop_timer;
cfdda9d7
SW		 1527 }
1528
1529 ep->plen = (u8) plen;
1530
1531 /*
1532 * If we don't have all the pdata yet, then bail.
1533 * We'll continue process when more data arrives.
1534 */
1535 if (ep->mpa_pkt_len < (sizeof(*mpa) + plen))
cc18b939 1536 return 0;
cfdda9d7
SW		 1537
1538 if (mpa->flags & MPA_REJECT) {
1539 err = -ECONNREFUSED;
da1cecdf 1540 goto err_stop_timer;
cfdda9d7
SW		 1541 }
1542
da1cecdf
H		 1543 /*
1544 * Stop mpa timer. If it expired, then
1545 * we ignore the MPA reply. process_timeout()
1546 * will abort the connection.
1547 */
1548 if (stop_ep_timer(ep))
1549 return 0;
1550
cfdda9d7
SW		 1551 /*
1552 * If we get here we have accumulated the entire mpa
1553 * start reply message including private data. And
1554 * the MPA header is valid.
1555 */
c529fb50 1556 __state_set(&ep->com, FPDU_MODE);
cfdda9d7
SW		 1557 ep->mpa_attr.crc_enabled = (mpa->flags & MPA_CRC) | crc_enabled ? 1 : 0;
1558 ep->mpa_attr.recv_marker_enabled = markers_enabled;
1559 ep->mpa_attr.xmit_marker_enabled = mpa->flags & MPA_MARKERS ? 1 : 0;
d2fe99e8
KS		 1560 ep->mpa_attr.version = mpa->revision;
1561 ep->mpa_attr.p2p_type = FW_RI_INIT_P2PTYPE_DISABLED;
1562
1563 if (mpa->revision == 2) {
1564 ep->mpa_attr.enhanced_rdma_conn =
1565 mpa->flags & MPA_ENHANCED_RDMA_CONN ? 1 : 0;
1566 if (ep->mpa_attr.enhanced_rdma_conn) {
1567 mpa_v2_params = (struct mpa_v2_conn_params *)
1568 (ep->mpa_pkt + sizeof(*mpa));
1569 resp_ird = ntohs(mpa_v2_params->ird) &
1570 MPA_V2_IRD_ORD_MASK;
1571 resp_ord = ntohs(mpa_v2_params->ord) &
1572 MPA_V2_IRD_ORD_MASK;
4c2c5763
HS		 1573 PDBG("%s responder ird %u ord %u ep ird %u ord %u\n",
1574 __func__, resp_ird, resp_ord, ep->ird, ep->ord);
d2fe99e8
KS		 1575
1576 /*
1577 * This is a double-check. Ideally, below checks are
1578 * not required since ird/ord stuff has been taken
1579 * care of in c4iw_accept_cr
1580 */
4c2c5763
HS		 1581 if (ep->ird < resp_ord) {
1582 if (RELAXED_IRD_NEGOTIATION && resp_ord <=
1583 ep->com.dev->rdev.lldi.max_ordird_qp)
1584 ep->ird = resp_ord;
1585 else
1586 insuff_ird = 1;
1587 } else if (ep->ird > resp_ord) {
1588 ep->ird = resp_ord;
1589 }
1590 if (ep->ord > resp_ird) {
1591 if (RELAXED_IRD_NEGOTIATION)
1592 ep->ord = resp_ird;
1593 else
1594 insuff_ird = 1;
1595 }
1596 if (insuff_ird) {
d2fe99e8
KS		 1597 err = -ENOMEM;
1598 ep->ird = resp_ord;
1599 ep->ord = resp_ird;
d2fe99e8
KS		 1600 }
1601
1602 if (ntohs(mpa_v2_params->ird) &
1603 MPA_V2_PEER2PEER_MODEL) {
1604 if (ntohs(mpa_v2_params->ord) &
1605 MPA_V2_RDMA_WRITE_RTR)
1606 ep->mpa_attr.p2p_type =
1607 FW_RI_INIT_P2PTYPE_RDMA_WRITE;
1608 else if (ntohs(mpa_v2_params->ord) &
1609 MPA_V2_RDMA_READ_RTR)
1610 ep->mpa_attr.p2p_type =
1611 FW_RI_INIT_P2PTYPE_READ_REQ;
1612 }
1613 }
1614 } else if (mpa->revision == 1)
1615 if (peer2peer)
1616 ep->mpa_attr.p2p_type = p2p_type;
1617
cfdda9d7 1618 PDBG("%s - crc_enabled=%d, recv_marker_enabled=%d, "
d2fe99e8
KS		 1619 "xmit_marker_enabled=%d, version=%d p2p_type=%d local-p2p_type = "
1620 "%d\n", __func__, ep->mpa_attr.crc_enabled,
1621 ep->mpa_attr.recv_marker_enabled,
1622 ep->mpa_attr.xmit_marker_enabled, ep->mpa_attr.version,
1623 ep->mpa_attr.p2p_type, p2p_type);
1624
1625 /*
1626 * If responder's RTR does not match with that of initiator, assign
1627 * FW_RI_INIT_P2PTYPE_DISABLED in mpa attributes so that RTR is not
1628 * generated when moving QP to RTS state.
1629 * A TERM message will be sent after QP has moved to RTS state
1630 */
91018f86 1631 if ((ep->mpa_attr.version == 2) && peer2peer &&
d2fe99e8
KS		 1632 (ep->mpa_attr.p2p_type != p2p_type)) {
1633 ep->mpa_attr.p2p_type = FW_RI_INIT_P2PTYPE_DISABLED;
1634 rtr_mismatch = 1;
1635 }
cfdda9d7
SW		 1636
1637 attrs.mpa_attr = ep->mpa_attr;
1638 attrs.max_ird = ep->ird;
1639 attrs.max_ord = ep->ord;
1640 attrs.llp_stream_handle = ep;
1641 attrs.next_state = C4IW_QP_STATE_RTS;
1642
1643 mask = C4IW_QP_ATTR_NEXT_STATE |
1644 C4IW_QP_ATTR_LLP_STREAM_HANDLE | C4IW_QP_ATTR_MPA_ATTR |
1645 C4IW_QP_ATTR_MAX_IRD | C4IW_QP_ATTR_MAX_ORD;
1646
1647 /* bind QP and TID with INIT_WR */
1648 err = c4iw_modify_qp(ep->com.qp->rhp,
1649 ep->com.qp, mask, &attrs, 1);
1650 if (err)
1651 goto err;
d2fe99e8
KS		 1652
1653 /*
1654 * If responder's RTR requirement did not match with what initiator
1655 * supports, generate TERM message
1656 */
1657 if (rtr_mismatch) {
1658 printk(KERN_ERR "%s: RTR mismatch, sending TERM\n", __func__);
1659 attrs.layer_etype = LAYER_MPA | DDP_LLP;
1660 attrs.ecode = MPA_NOMATCH_RTR;
1661 attrs.next_state = C4IW_QP_STATE_TERMINATE;
cc18b939 1662 attrs.send_term = 1;
d2fe99e8 1663 err = c4iw_modify_qp(ep->com.qp->rhp, ep->com.qp,
cc18b939 1664 C4IW_QP_ATTR_NEXT_STATE, &attrs, 1);
d2fe99e8 1665 err = -ENOMEM;
cc18b939 1666 disconnect = 1;
d2fe99e8
KS		 1667 goto out;
1668 }
1669
1670 /*
1671 * Generate TERM if initiator IRD is not sufficient for responder
1672 * provided ORD. Currently, we do the same behaviour even when
1673 * responder provided IRD is also not sufficient as regards to
1674 * initiator ORD.
1675 */
1676 if (insuff_ird) {
1677 printk(KERN_ERR "%s: Insufficient IRD, sending TERM\n",
1678 __func__);
1679 attrs.layer_etype = LAYER_MPA | DDP_LLP;
1680 attrs.ecode = MPA_INSUFF_IRD;
1681 attrs.next_state = C4IW_QP_STATE_TERMINATE;
cc18b939 1682 attrs.send_term = 1;
d2fe99e8 1683 err = c4iw_modify_qp(ep->com.qp->rhp, ep->com.qp,
cc18b939 1684 C4IW_QP_ATTR_NEXT_STATE, &attrs, 1);
d2fe99e8 1685 err = -ENOMEM;
cc18b939 1686 disconnect = 1;
d2fe99e8
KS		 1687 goto out;
1688 }
cfdda9d7 1689 goto out;
da1cecdf
H		 1690err_stop_timer:
1691 stop_ep_timer(ep);
cfdda9d7 1692err:
f8e1e1d1 1693 disconnect = 2;
cfdda9d7
SW		 1694out:
1695 connect_reply_upcall(ep, err);
cc18b939 1696 return disconnect;
cfdda9d7
SW		 1697}
1698
fd6aabe4
H		 1699/*
1700 * process_mpa_request - process streaming mode MPA request
1701 *
1702 * Returns:
1703 *
1704 * 0 upon success indicating a connect request was delivered to the ULP
1705 * or the mpa request is incomplete but valid so far.
1706 *
1707 * 1 if a failure requires the caller to close the connection.
1708 *
1709 * 2 if a failure requires the caller to abort the connection.
1710 */
1711static int process_mpa_request(struct c4iw_ep *ep, struct sk_buff *skb)
cfdda9d7
SW		 1712{
1713 struct mpa_message *mpa;
d2fe99e8 1714 struct mpa_v2_conn_params *mpa_v2_params;
cfdda9d7
SW		 1715 u16 plen;
1716
1717 PDBG("%s ep %p tid %u\n", __func__, ep, ep->hwtid);
1718
cfdda9d7
SW		 1719 /*
1720 * If we get more than the supported amount of private data
1721 * then we must fail this connection.
1722 */
fd6aabe4
H		 1723 if (ep->mpa_pkt_len + skb->len > sizeof(ep->mpa_pkt))
1724 goto err_stop_timer;
cfdda9d7
SW		 1725
1726 PDBG("%s enter (%s line %u)\n", __func__, __FILE__, __LINE__);
1727
1728 /*
1729 * Copy the new data into our accumulation buffer.
1730 */
1731 skb_copy_from_linear_data(skb, &(ep->mpa_pkt[ep->mpa_pkt_len]),
1732 skb->len);
1733 ep->mpa_pkt_len += skb->len;
1734
1735 /*
1736 * If we don't even have the mpa message, then bail.
1737 * We'll continue process when more data arrives.
1738 */
1739 if (ep->mpa_pkt_len < sizeof(*mpa))
fd6aabe4 1740 return 0;
cfdda9d7
SW		 1741
1742 PDBG("%s enter (%s line %u)\n", __func__, __FILE__, __LINE__);
cfdda9d7
SW		 1743 mpa = (struct mpa_message *) ep->mpa_pkt;
1744
1745 /*
1746 * Validate MPA Header.
1747 */
d2fe99e8
KS		 1748 if (mpa->revision > mpa_rev) {
1749 printk(KERN_ERR MOD "%s MPA version mismatch. Local = %d,"
1750 " Received = %d\n", __func__, mpa_rev, mpa->revision);
fd6aabe4 1751 goto err_stop_timer;
cfdda9d7
SW		 1752 }
1753
fd6aabe4
H		 1754 if (memcmp(mpa->key, MPA_KEY_REQ, sizeof(mpa->key)))
1755 goto err_stop_timer;
cfdda9d7
SW		 1756
1757 plen = ntohs(mpa->private_data_size);
1758
1759 /*
1760 * Fail if there's too much private data.
1761 */
fd6aabe4
H		 1762 if (plen > MPA_MAX_PRIVATE_DATA)
1763 goto err_stop_timer;
cfdda9d7
SW		 1764
1765 /*
1766 * If plen does not account for pkt size
1767 */
fd6aabe4
H		 1768 if (ep->mpa_pkt_len > (sizeof(*mpa) + plen))
1769 goto err_stop_timer;
cfdda9d7
SW		 1770 ep->plen = (u8) plen;
1771
1772 /*
1773 * If we don't have all the pdata yet, then bail.
1774 */
1775 if (ep->mpa_pkt_len < (sizeof(*mpa) + plen))
fd6aabe4 1776 return 0;
cfdda9d7
SW		 1777
1778 /*
1779 * If we get here we have accumulated the entire mpa
1780 * start reply message including private data.
1781 */
1782 ep->mpa_attr.initiator = 0;
1783 ep->mpa_attr.crc_enabled = (mpa->flags & MPA_CRC) | crc_enabled ? 1 : 0;
1784 ep->mpa_attr.recv_marker_enabled = markers_enabled;
1785 ep->mpa_attr.xmit_marker_enabled = mpa->flags & MPA_MARKERS ? 1 : 0;
d2fe99e8
KS		 1786 ep->mpa_attr.version = mpa->revision;
1787 if (mpa->revision == 1)
1788 ep->tried_with_mpa_v1 = 1;
1789 ep->mpa_attr.p2p_type = FW_RI_INIT_P2PTYPE_DISABLED;
1790
1791 if (mpa->revision == 2) {
1792 ep->mpa_attr.enhanced_rdma_conn =
1793 mpa->flags & MPA_ENHANCED_RDMA_CONN ? 1 : 0;
1794 if (ep->mpa_attr.enhanced_rdma_conn) {
1795 mpa_v2_params = (struct mpa_v2_conn_params *)
1796 (ep->mpa_pkt + sizeof(*mpa));
1797 ep->ird = ntohs(mpa_v2_params->ird) &
1798 MPA_V2_IRD_ORD_MASK;
1799 ep->ord = ntohs(mpa_v2_params->ord) &
1800 MPA_V2_IRD_ORD_MASK;
4c2c5763
HS		 1801 PDBG("%s initiator ird %u ord %u\n", __func__, ep->ird,
1802 ep->ord);
d2fe99e8
KS		 1803 if (ntohs(mpa_v2_params->ird) & MPA_V2_PEER2PEER_MODEL)
1804 if (peer2peer) {
1805 if (ntohs(mpa_v2_params->ord) &
1806 MPA_V2_RDMA_WRITE_RTR)
1807 ep->mpa_attr.p2p_type =
1808 FW_RI_INIT_P2PTYPE_RDMA_WRITE;
1809 else if (ntohs(mpa_v2_params->ord) &
1810 MPA_V2_RDMA_READ_RTR)
1811 ep->mpa_attr.p2p_type =
1812 FW_RI_INIT_P2PTYPE_READ_REQ;
1813 }
1814 }
1815 } else if (mpa->revision == 1)
1816 if (peer2peer)
1817 ep->mpa_attr.p2p_type = p2p_type;
1818
cfdda9d7
SW		 1819 PDBG("%s - crc_enabled=%d, recv_marker_enabled=%d, "
1820 "xmit_marker_enabled=%d, version=%d p2p_type=%d\n", __func__,
1821 ep->mpa_attr.crc_enabled, ep->mpa_attr.recv_marker_enabled,
1822 ep->mpa_attr.xmit_marker_enabled, ep->mpa_attr.version,
1823 ep->mpa_attr.p2p_type);
1824
e4b76a2a
H		 1825 __state_set(&ep->com, MPA_REQ_RCVD);
1826
1827 /* drive upcall */
1828 mutex_lock_nested(&ep->parent_ep->com.mutex, SINGLE_DEPTH_NESTING);
1829 if (ep->parent_ep->com.state != DEAD) {
1830 if (connect_request_upcall(ep))
fd6aabe4 1831 goto err_unlock_parent;
e4b76a2a
H		 1832 } else {
1833 goto err_unlock_parent;
be13b2df 1834 }
e4b76a2a 1835 mutex_unlock(&ep->parent_ep->com.mutex);
fd6aabe4
H		 1836 return 0;
1837
1838err_unlock_parent:
1839 mutex_unlock(&ep->parent_ep->com.mutex);
1840 goto err_out;
1841err_stop_timer:
1842 (void)stop_ep_timer(ep);
1843err_out:
1844 return 2;
cfdda9d7
SW		 1845}
1846
1847static int rx_data(struct c4iw_dev *dev, struct sk_buff *skb)
1848{
1849 struct c4iw_ep *ep;
1850 struct cpl_rx_data *hdr = cplhdr(skb);
1851 unsigned int dlen = ntohs(hdr->len);
1852 unsigned int tid = GET_TID(hdr);
793dad94 1853 __u8 status = hdr->status;
cc18b939 1854 int disconnect = 0;
cfdda9d7 1855
944661dd 1856 ep = get_ep_from_tid(dev, tid);
977116c6
SW		 1857 if (!ep)
1858 return 0;
cfdda9d7
SW		 1859 PDBG("%s ep %p tid %u dlen %u\n", __func__, ep, ep->hwtid, dlen);
1860 skb_pull(skb, sizeof(*hdr));
1861 skb_trim(skb, dlen);
c529fb50 1862 mutex_lock(&ep->com.mutex);
cfdda9d7 1863
cfdda9d7
SW		 1864 /* update RX credits */
1865 update_rx_credits(ep, dlen);
1866
c529fb50 1867 switch (ep->com.state) {
cfdda9d7 1868 case MPA_REQ_SENT:
55abf8df 1869 ep->rcv_seq += dlen;
cc18b939 1870 disconnect = process_mpa_reply(ep, skb);
cfdda9d7
SW		 1871 break;
1872 case MPA_REQ_WAIT:
55abf8df 1873 ep->rcv_seq += dlen;
4a4dd8db 1874 disconnect = process_mpa_request(ep, skb);
cfdda9d7 1875 break;
1557967b
VP		 1876 case FPDU_MODE: {
1877 struct c4iw_qp_attributes attrs;
1878 BUG_ON(!ep->com.qp);
e8e5b927 1879 if (status)
1557967b 1880 pr_err("%s Unexpected streaming data." \
04236df2
VP		 1881 " qpid %u ep %p state %d tid %u status %d\n",
1882 __func__, ep->com.qp->wq.sq.qid, ep,
c529fb50 1883 ep->com.state, ep->hwtid, status);
97d7ec0c 1884 attrs.next_state = C4IW_QP_STATE_TERMINATE;
1557967b 1885 c4iw_modify_qp(ep->com.qp->rhp, ep->com.qp,
cc18b939
SW		 1886 C4IW_QP_ATTR_NEXT_STATE, &attrs, 1);
1887 disconnect = 1;
cfdda9d7
SW		 1888 break;
1889 }
1557967b
VP		 1890 default:
1891 break;
1892 }
c529fb50 1893 mutex_unlock(&ep->com.mutex);
cc18b939 1894 if (disconnect)
4a4dd8db 1895 c4iw_ep_disconnect(ep, disconnect == 2, GFP_KERNEL);
944661dd 1896 c4iw_put_ep(&ep->com);
cfdda9d7
SW		 1897 return 0;
1898}
1899
1900static int abort_rpl(struct c4iw_dev *dev, struct sk_buff *skb)
1901{
1902 struct c4iw_ep *ep;
1903 struct cpl_abort_rpl_rss *rpl = cplhdr(skb);
cfdda9d7
SW		 1904 int release = 0;
1905 unsigned int tid = GET_TID(rpl);
cfdda9d7 1906
944661dd 1907 ep = get_ep_from_tid(dev, tid);
4984037b
VP		 1908 if (!ep) {
1909 printk(KERN_WARNING MOD "Abort rpl to freed endpoint\n");
1910 return 0;
1911 }
92dd6c3d 1912 PDBG("%s ep %p tid %u\n", __func__, ep, ep->hwtid);
2f5b48c3 1913 mutex_lock(&ep->com.mutex);
cfdda9d7
SW		 1914 switch (ep->com.state) {
1915 case ABORTING:
91e9c071 1916 c4iw_wake_up(&ep->com.wr_wait, -ECONNRESET);
cfdda9d7
SW		 1917 __state_set(&ep->com, DEAD);
1918 release = 1;
1919 break;
1920 default:
1921 printk(KERN_ERR "%s ep %p state %d\n",
1922 __func__, ep, ep->com.state);
1923 break;
1924 }
2f5b48c3 1925 mutex_unlock(&ep->com.mutex);
cfdda9d7
SW		 1926
1927 if (release)
1928 release_ep_resources(ep);
944661dd 1929 c4iw_put_ep(&ep->com);
cfdda9d7
SW		 1930 return 0;
1931}
1932
caa6c9f2 1933static int send_fw_act_open_req(struct c4iw_ep *ep, unsigned int atid)
5be78ee9
VP		 1934{
1935 struct sk_buff *skb;
1936 struct fw_ofld_connection_wr *req;
1937 unsigned int mtu_idx;
1938 int wscale;
830662f6 1939 struct sockaddr_in *sin;
b408ff28 1940 int win;
5be78ee9
VP		 1941
1942 skb = get_skb(NULL, sizeof(*req), GFP_KERNEL);
1943 req = (struct fw_ofld_connection_wr *)__skb_put(skb, sizeof(*req));
1944 memset(req, 0, sizeof(*req));
6c53e938 1945 req->op_compl = htonl(WR_OP_V(FW_OFLD_CONNECTION_WR));
e2ac9628 1946 req->len16_pkd = htonl(FW_WR_LEN16_V(DIV_ROUND_UP(sizeof(*req), 16)));
41b4f86c
KS		 1947 req->le.filter = cpu_to_be32(cxgb4_select_ntuple(
1948 ep->com.dev->rdev.lldi.ports[0],
5be78ee9 1949 ep->l2t));
170003c8 1950 sin = (struct sockaddr_in *)&ep->com.local_addr;
830662f6
VP		 1951 req->le.lport = sin->sin_port;
1952 req->le.u.ipv4.lip = sin->sin_addr.s_addr;
170003c8 1953 sin = (struct sockaddr_in *)&ep->com.remote_addr;
830662f6
VP		 1954 req->le.pport = sin->sin_port;
1955 req->le.u.ipv4.pip = sin->sin_addr.s_addr;
5be78ee9 1956 req->tcb.t_state_to_astid =
77a80e23
HS		 1957 htonl(FW_OFLD_CONNECTION_WR_T_STATE_V(TCP_SYN_SENT) |
1958 FW_OFLD_CONNECTION_WR_ASTID_V(atid));
5be78ee9 1959 req->tcb.cplrxdataack_cplpassacceptrpl =
77a80e23 1960 htons(FW_OFLD_CONNECTION_WR_CPLRXDATAACK_F);
ef5d6355 1961 req->tcb.tx_max = (__force __be32) jiffies;
793dad94 1962 req->tcb.rcv_adv = htons(1);
92e7ae71 1963 best_mtu(ep->com.dev->rdev.lldi.mtus, ep->mtu, &mtu_idx,
04524a47
H		 1964 enable_tcp_timestamps,
1965 (AF_INET == ep->com.remote_addr.ss_family) ? 0 : 1);
5be78ee9 1966 wscale = compute_wscale(rcv_win);
b408ff28
HS		 1967
1968 /*
1969 * Specify the largest window that will fit in opt0. The
1970 * remainder will be specified in the rx_data_ack.
1971 */
1972 win = ep->rcv_win >> 10;
d7990b0c
AB		 1973 if (win > RCV_BUFSIZ_M)
1974 win = RCV_BUFSIZ_M;
b408ff28 1975
6c53e938
HS		 1976 req->tcb.opt0 = (__force __be64) (TCAM_BYPASS_F |
1977 (nocong ? NO_CONG_F : 0) |
d7990b0c 1978 KEEP_ALIVE_F |
6c53e938 1979 DELACK_F |
d7990b0c
AB		 1980 WND_SCALE_V(wscale) |
1981 MSS_IDX_V(mtu_idx) |
1982 L2T_IDX_V(ep->l2t->idx) |
1983 TX_CHAN_V(ep->tx_chan) |
1984 SMAC_SEL_V(ep->smac_idx) |
ac8e4c69 1985 DSCP_V(ep->tos >> 2) |
d7990b0c
AB		 1986 ULP_MODE_V(ULP_MODE_TCPDDP) |
1987 RCV_BUFSIZ_V(win));
6c53e938
HS		 1988 req->tcb.opt2 = (__force __be32) (PACE_V(1) |
1989 TX_QUEUE_V(ep->com.dev->rdev.lldi.tx_modq[ep->tx_chan]) |
d7990b0c 1990 RX_CHANNEL_V(0) |
6c53e938 1991 CCTRL_ECN_V(enable_ecn) |
d7990b0c 1992 RSS_QUEUE_VALID_F | RSS_QUEUE_V(ep->rss_qid));
5be78ee9 1993 if (enable_tcp_timestamps)
6c53e938 1994 req->tcb.opt2 |= (__force __be32)TSTAMPS_EN_F;
5be78ee9 1995 if (enable_tcp_sack)
6c53e938 1996 req->tcb.opt2 |= (__force __be32)SACK_EN_F;
5be78ee9 1997 if (wscale && enable_tcp_window_scaling)
d7990b0c
AB		 1998 req->tcb.opt2 |= (__force __be32)WND_SCALE_EN_F;
1999 req->tcb.opt0 = cpu_to_be64((__force u64)req->tcb.opt0);
2000 req->tcb.opt2 = cpu_to_be32((__force u32)req->tcb.opt2);
793dad94
VP		 2001 set_wr_txq(skb, CPL_PRIORITY_CONTROL, ep->ctrlq_idx);
2002 set_bit(ACT_OFLD_CONN, &ep->com.history);
caa6c9f2 2003 return c4iw_l2t_send(&ep->com.dev->rdev, skb, ep->l2t);
5be78ee9
VP		 2004}
2005
cfdda9d7
SW		 2006/*
2007 * Return whether a failed active open has allocated a TID
2008 */
2009static inline int act_open_has_tid(int status)
2010{
2011 return status != CPL_ERR_TCAM_FULL && status != CPL_ERR_CONN_EXIST &&
2012 status != CPL_ERR_ARP_MISS;
2013}
2014
7a2cea2a
SW		 2015/* Returns whether a CPL status conveys negative advice.
2016 */
2017static int is_neg_adv(unsigned int status)
2018{
2019 return status == CPL_ERR_RTX_NEG_ADVICE ||
2020 status == CPL_ERR_PERSIST_NEG_ADVICE ||
2021 status == CPL_ERR_KEEPALV_NEG_ADVICE;
2022}
2023
dd92b124
HS		 2024static char *neg_adv_str(unsigned int status)
2025{
2026 switch (status) {
2027 case CPL_ERR_RTX_NEG_ADVICE:
2028 return "Retransmit timeout";
2029 case CPL_ERR_PERSIST_NEG_ADVICE:
2030 return "Persist timeout";
2031 case CPL_ERR_KEEPALV_NEG_ADVICE:
2032 return "Keepalive timeout";
2033 default:
2034 return "Unknown";
2035 }
2036}
2037
b408ff28
HS		 2038static void set_tcp_window(struct c4iw_ep *ep, struct port_info *pi)
2039{
2040 ep->snd_win = snd_win;
2041 ep->rcv_win = rcv_win;
2042 PDBG("%s snd_win %d rcv_win %d\n", __func__, ep->snd_win, ep->rcv_win);
2043}
2044
793dad94
VP		 2045#define ACT_OPEN_RETRY_COUNT 2
2046
830662f6
VP		 2047static int import_ep(struct c4iw_ep *ep, int iptype, __u8 *peer_ip,
2048 struct dst_entry *dst, struct c4iw_dev *cdev,
ac8e4c69 2049 bool clear_mpa_v1, enum chip_type adapter_type, u8 tos)
830662f6
VP		 2050{
2051 struct neighbour *n;
2052 int err, step;
2053 struct net_device *pdev;
2054
2055 n = dst_neigh_lookup(dst, peer_ip);
2056 if (!n)
2057 return -ENODEV;
2058
2059 rcu_read_lock();
2060 err = -ENOMEM;
2061 if (n->dev->flags & IFF_LOOPBACK) {
2062 if (iptype == 4)
2063 pdev = ip_dev_find(&init_net, *(__be32 *)peer_ip);
2064 else if (IS_ENABLED(CONFIG_IPV6))
2065 for_each_netdev(&init_net, pdev) {
2066 if (ipv6_chk_addr(&init_net,
2067 (struct in6_addr *)peer_ip,
2068 pdev, 1))
2069 break;
2070 }
2071 else
2072 pdev = NULL;
2073
2074 if (!pdev) {
2075 err = -ENODEV;
2076 goto out;
2077 }
2078 ep->l2t = cxgb4_l2t_get(cdev->rdev.lldi.l2t,
ac8e4c69 2079 n, pdev, rt_tos2priority(tos));
830662f6
VP		 2080 if (!ep->l2t)
2081 goto out;
2082 ep->mtu = pdev->mtu;
2083 ep->tx_chan = cxgb4_port_chan(pdev);
963cab50
H		 2084 ep->smac_idx = cxgb4_tp_smt_idx(adapter_type,
2085 cxgb4_port_viid(pdev));
830662f6
VP		 2086 step = cdev->rdev.lldi.ntxq /
2087 cdev->rdev.lldi.nchan;
2088 ep->txq_idx = cxgb4_port_idx(pdev) * step;
2089 step = cdev->rdev.lldi.nrxq /
2090 cdev->rdev.lldi.nchan;
2091 ep->ctrlq_idx = cxgb4_port_idx(pdev);
2092 ep->rss_qid = cdev->rdev.lldi.rxq_ids[
2093 cxgb4_port_idx(pdev) * step];
b408ff28 2094 set_tcp_window(ep, (struct port_info *)netdev_priv(pdev));
830662f6
VP		 2095 dev_put(pdev);
2096 } else {
2097 pdev = get_real_dev(n->dev);
2098 ep->l2t = cxgb4_l2t_get(cdev->rdev.lldi.l2t,
2099 n, pdev, 0);
2100 if (!ep->l2t)
2101 goto out;
2102 ep->mtu = dst_mtu(dst);
11b8e22d 2103 ep->tx_chan = cxgb4_port_chan(pdev);
963cab50
H		 2104 ep->smac_idx = cxgb4_tp_smt_idx(adapter_type,
2105 cxgb4_port_viid(pdev));
830662f6
VP		 2106 step = cdev->rdev.lldi.ntxq /
2107 cdev->rdev.lldi.nchan;
11b8e22d
SW		 2108 ep->txq_idx = cxgb4_port_idx(pdev) * step;
2109 ep->ctrlq_idx = cxgb4_port_idx(pdev);
830662f6
VP		 2110 step = cdev->rdev.lldi.nrxq /
2111 cdev->rdev.lldi.nchan;
2112 ep->rss_qid = cdev->rdev.lldi.rxq_ids[
11b8e22d 2113 cxgb4_port_idx(pdev) * step];
b408ff28 2114 set_tcp_window(ep, (struct port_info *)netdev_priv(pdev));
830662f6
VP		 2115
2116 if (clear_mpa_v1) {
2117 ep->retry_with_mpa_v1 = 0;
2118 ep->tried_with_mpa_v1 = 0;
2119 }
2120 }
2121 err = 0;
2122out:
2123 rcu_read_unlock();
2124
2125 neigh_release(n);
2126
2127 return err;
2128}
2129
793dad94
VP		 2130static int c4iw_reconnect(struct c4iw_ep *ep)
2131{
2132 int err = 0;
24d44a39 2133 struct sockaddr_in *laddr = (struct sockaddr_in *)
170003c8 2134 &ep->com.cm_id->m_local_addr;
24d44a39 2135 struct sockaddr_in *raddr = (struct sockaddr_in *)
170003c8 2136 &ep->com.cm_id->m_remote_addr;
830662f6 2137 struct sockaddr_in6 *laddr6 = (struct sockaddr_in6 *)
170003c8 2138 &ep->com.cm_id->m_local_addr;
830662f6 2139 struct sockaddr_in6 *raddr6 = (struct sockaddr_in6 *)
170003c8 2140 &ep->com.cm_id->m_remote_addr;
830662f6
VP		 2141 int iptype;
2142 __u8 *ra;
793dad94
VP		 2143
2144 PDBG("%s qp %p cm_id %p\n", __func__, ep->com.qp, ep->com.cm_id);
2145 init_timer(&ep->timer);
093108cb 2146 c4iw_init_wr_wait(&ep->com.wr_wait);
793dad94
VP		 2147
2148 /*
2149 * Allocate an active TID to initiate a TCP connection.
2150 */
2151 ep->atid = cxgb4_alloc_atid(ep->com.dev->rdev.lldi.tids, ep);
2152 if (ep->atid == -1) {
2153 pr_err("%s - cannot alloc atid.\n", __func__);
2154 err = -ENOMEM;
2155 goto fail2;
2156 }
2157 insert_handle(ep->com.dev, &ep->com.dev->atid_idr, ep, ep->atid);
2158
2159 /* find a route */
170003c8 2160 if (ep->com.cm_id->m_local_addr.ss_family == AF_INET) {
830662f6
VP		 2161 ep->dst = find_route(ep->com.dev, laddr->sin_addr.s_addr,
2162 raddr->sin_addr.s_addr, laddr->sin_port,
ac8e4c69 2163 raddr->sin_port, ep->com.cm_id->tos);
830662f6
VP		 2164 iptype = 4;
2165 ra = (__u8 *)&raddr->sin_addr;
2166 } else {
2167 ep->dst = find_route6(ep->com.dev, laddr6->sin6_addr.s6_addr,
2168 raddr6->sin6_addr.s6_addr,
2169 laddr6->sin6_port, raddr6->sin6_port, 0,
2170 raddr6->sin6_scope_id);
2171 iptype = 6;
2172 ra = (__u8 *)&raddr6->sin6_addr;
2173 }
2174 if (!ep->dst) {
793dad94
VP		 2175 pr_err("%s - cannot find route.\n", __func__);
2176 err = -EHOSTUNREACH;
2177 goto fail3;
2178 }
963cab50 2179 err = import_ep(ep, iptype, ra, ep->dst, ep->com.dev, false,
ac8e4c69
H		 2180 ep->com.dev->rdev.lldi.adapter_type,
2181 ep->com.cm_id->tos);
830662f6 2182 if (err) {
793dad94 2183 pr_err("%s - cannot alloc l2e.\n", __func__);
793dad94
VP		 2184 goto fail4;
2185 }
2186
2187 PDBG("%s txq_idx %u tx_chan %u smac_idx %u rss_qid %u l2t_idx %u\n",
2188 __func__, ep->txq_idx, ep->tx_chan, ep->smac_idx, ep->rss_qid,
2189 ep->l2t->idx);
2190
2191 state_set(&ep->com, CONNECTING);
ac8e4c69 2192 ep->tos = ep->com.cm_id->tos;
793dad94
VP		 2193
2194 /* send connect request to rnic */
2195 err = send_connect(ep);
2196 if (!err)
2197 goto out;
2198
2199 cxgb4_l2t_release(ep->l2t);
2200fail4:
2201 dst_release(ep->dst);
2202fail3:
2203 remove_handle(ep->com.dev, &ep->com.dev->atid_idr, ep->atid);
2204 cxgb4_free_atid(ep->com.dev->rdev.lldi.tids, ep->atid);
2205fail2:
2206 /*
2207 * remember to send notification to upper layer.
2208 * We are in here so the upper layer is not aware that this is
2209 * re-connect attempt and so, upper layer is still waiting for
2210 * response of 1st connect request.
2211 */
2212 connect_reply_upcall(ep, -ECONNRESET);
2213 c4iw_put_ep(&ep->com);
2214out:
2215 return err;
2216}
2217
cfdda9d7
SW		 2218static int act_open_rpl(struct c4iw_dev *dev, struct sk_buff *skb)
2219{
2220 struct c4iw_ep *ep;
2221 struct cpl_act_open_rpl *rpl = cplhdr(skb);
6c53e938
HS		 2222 unsigned int atid = TID_TID_G(AOPEN_ATID_G(
2223 ntohl(rpl->atid_status)));
cfdda9d7 2224 struct tid_info *t = dev->rdev.lldi.tids;
6c53e938 2225 int status = AOPEN_STATUS_G(ntohl(rpl->atid_status));
830662f6
VP		 2226 struct sockaddr_in *la;
2227 struct sockaddr_in *ra;
2228 struct sockaddr_in6 *la6;
2229 struct sockaddr_in6 *ra6;
caa6c9f2 2230 int ret = 0;
cfdda9d7
SW		 2231
2232 ep = lookup_atid(t, atid);
170003c8
SW		 2233 la = (struct sockaddr_in *)&ep->com.local_addr;
2234 ra = (struct sockaddr_in *)&ep->com.remote_addr;
2235 la6 = (struct sockaddr_in6 *)&ep->com.local_addr;
2236 ra6 = (struct sockaddr_in6 *)&ep->com.remote_addr;
cfdda9d7
SW		 2237
2238 PDBG("%s ep %p atid %u status %u errno %d\n", __func__, ep, atid,
2239 status, status2errno(status));
2240
7a2cea2a 2241 if (is_neg_adv(status)) {
179d03bb
H		 2242 PDBG("%s Connection problems for atid %u status %u (%s)\n",
2243 __func__, atid, status, neg_adv_str(status));
2244 ep->stats.connect_neg_adv++;
2245 mutex_lock(&dev->rdev.stats.lock);
2246 dev->rdev.stats.neg_adv++;
2247 mutex_unlock(&dev->rdev.stats.lock);
cfdda9d7
SW		 2248 return 0;
2249 }
2250
793dad94
VP		 2251 set_bit(ACT_OPEN_RPL, &ep->com.history);
2252
d716a2a0
VP		 2253 /*
2254 * Log interesting failures.
2255 */
2256 switch (status) {
2257 case CPL_ERR_CONN_RESET:
2258 case CPL_ERR_CONN_TIMEDOUT:
2259 break;
5be78ee9 2260 case CPL_ERR_TCAM_FULL:
830662f6 2261 mutex_lock(&dev->rdev.stats.lock);
3b174d94 2262 dev->rdev.stats.tcam_full++;
830662f6
VP		 2263 mutex_unlock(&dev->rdev.stats.lock);
2264 if (ep->com.local_addr.ss_family == AF_INET &&
2265 dev->rdev.lldi.enable_fw_ofld_conn) {
caa6c9f2
H		 2266 ret = send_fw_act_open_req(ep, TID_TID_G(AOPEN_ATID_G(
2267 ntohl(rpl->atid_status))));
2268 if (ret)
2269 goto fail;
793dad94
VP		 2270 return 0;
2271 }
2272 break;
2273 case CPL_ERR_CONN_EXIST:
2274 if (ep->retry_count++ < ACT_OPEN_RETRY_COUNT) {
2275 set_bit(ACT_RETRY_INUSE, &ep->com.history);
84cc6ac6
H		 2276 if (ep->com.remote_addr.ss_family == AF_INET6) {
2277 struct sockaddr_in6 *sin6 =
2278 (struct sockaddr_in6 *)
170003c8 2279 &ep->com.local_addr;
84cc6ac6
H		 2280 cxgb4_clip_release(
2281 ep->com.dev->rdev.lldi.ports[0],
2282 (const u32 *)
2283 &sin6->sin6_addr.s6_addr, 1);
2284 }
793dad94
VP		 2285 remove_handle(ep->com.dev, &ep->com.dev->atid_idr,
2286 atid);
2287 cxgb4_free_atid(t, atid);
2288 dst_release(ep->dst);
2289 cxgb4_l2t_release(ep->l2t);
2290 c4iw_reconnect(ep);
2291 return 0;
2292 }
5be78ee9 2293 break;
d716a2a0 2294 default:
830662f6
VP		 2295 if (ep->com.local_addr.ss_family == AF_INET) {
2296 pr_info("Active open failure - atid %u status %u errno %d %pI4:%u->%pI4:%u\n",
2297 atid, status, status2errno(status),
2298 &la->sin_addr.s_addr, ntohs(la->sin_port),
2299 &ra->sin_addr.s_addr, ntohs(ra->sin_port));
2300 } else {
2301 pr_info("Active open failure - atid %u status %u errno %d %pI6:%u->%pI6:%u\n",
2302 atid, status, status2errno(status),
2303 la6->sin6_addr.s6_addr, ntohs(la6->sin6_port),
2304 ra6->sin6_addr.s6_addr, ntohs(ra6->sin6_port));
2305 }
d716a2a0
VP		 2306 break;
2307 }
2308
caa6c9f2 2309fail:
cfdda9d7
SW		 2310 connect_reply_upcall(ep, status2errno(status));
2311 state_set(&ep->com, DEAD);
2312
84cc6ac6
H		 2313 if (ep->com.remote_addr.ss_family == AF_INET6) {
2314 struct sockaddr_in6 *sin6 =
170003c8 2315 (struct sockaddr_in6 *)&ep->com.local_addr;
84cc6ac6
H		 2316 cxgb4_clip_release(ep->com.dev->rdev.lldi.ports[0],
2317 (const u32 *)&sin6->sin6_addr.s6_addr, 1);
2318 }
cfdda9d7
SW		 2319 if (status && act_open_has_tid(status))
2320 cxgb4_remove_tid(ep->com.dev->rdev.lldi.tids, 0, GET_TID(rpl));
2321
793dad94 2322 remove_handle(ep->com.dev, &ep->com.dev->atid_idr, atid);
cfdda9d7
SW		 2323 cxgb4_free_atid(t, atid);
2324 dst_release(ep->dst);
2325 cxgb4_l2t_release(ep->l2t);
2326 c4iw_put_ep(&ep->com);
2327
2328 return 0;
2329}
2330
2331static int pass_open_rpl(struct c4iw_dev *dev, struct sk_buff *skb)
2332{
2333 struct cpl_pass_open_rpl *rpl = cplhdr(skb);
cfdda9d7 2334 unsigned int stid = GET_TID(rpl);
f86fac79 2335 struct c4iw_listen_ep *ep = get_ep_from_stid(dev, stid);
cfdda9d7
SW		 2336
2337 if (!ep) {
1cab775c
VP		 2338 PDBG("%s stid %d lookup failure!\n", __func__, stid);
2339 goto out;
cfdda9d7
SW		 2340 }
2341 PDBG("%s ep %p status %d error %d\n", __func__, ep,
2342 rpl->status, status2errno(rpl->status));
d9594d99 2343 c4iw_wake_up(&ep->com.wr_wait, status2errno(rpl->status));
f86fac79 2344 c4iw_put_ep(&ep->com);
1cab775c 2345out:
cfdda9d7
SW		 2346 return 0;
2347}
2348
cfdda9d7
SW		 2349static int close_listsrv_rpl(struct c4iw_dev *dev, struct sk_buff *skb)
2350{
2351 struct cpl_close_listsvr_rpl *rpl = cplhdr(skb);
cfdda9d7 2352 unsigned int stid = GET_TID(rpl);
f86fac79 2353 struct c4iw_listen_ep *ep = get_ep_from_stid(dev, stid);
cfdda9d7
SW		 2354
2355 PDBG("%s ep %p\n", __func__, ep);
d9594d99 2356 c4iw_wake_up(&ep->com.wr_wait, status2errno(rpl->status));
f86fac79 2357 c4iw_put_ep(&ep->com);
cfdda9d7
SW		 2358 return 0;
2359}
2360
9dec900c
H		 2361static int accept_cr(struct c4iw_ep *ep, struct sk_buff *skb,
2362 struct cpl_pass_accept_req *req)
cfdda9d7
SW		 2363{
2364 struct cpl_pass_accept_rpl *rpl;
2365 unsigned int mtu_idx;
2366 u64 opt0;
2367 u32 opt2;
2368 int wscale;
92e7ae71 2369 struct cpl_t5_pass_accept_rpl *rpl5 = NULL;
b408ff28 2370 int win;
963cab50 2371 enum chip_type adapter_type = ep->com.dev->rdev.lldi.adapter_type;
cfdda9d7
SW		 2372
2373 PDBG("%s ep %p tid %u\n", __func__, ep, ep->hwtid);
2374 BUG_ON(skb_cloned(skb));
92e7ae71 2375
cfdda9d7 2376 skb_get(skb);
92e7ae71 2377 rpl = cplhdr(skb);
963cab50 2378 if (!is_t4(adapter_type)) {
92e7ae71
HS		 2379 skb_trim(skb, roundup(sizeof(*rpl5), 16));
2380 rpl5 = (void *)rpl;
2381 INIT_TP_WR(rpl5, ep->hwtid);
2382 } else {
2383 skb_trim(skb, sizeof(*rpl));
2384 INIT_TP_WR(rpl, ep->hwtid);
2385 }
2386 OPCODE_TID(rpl) = cpu_to_be32(MK_OPCODE_TID(CPL_PASS_ACCEPT_RPL,
2387 ep->hwtid));
2388
2389 best_mtu(ep->com.dev->rdev.lldi.mtus, ep->mtu, &mtu_idx,
04524a47
H		 2390 enable_tcp_timestamps && req->tcpopt.tstamp,
2391 (AF_INET == ep->com.remote_addr.ss_family) ? 0 : 1);
cfdda9d7 2392 wscale = compute_wscale(rcv_win);
b408ff28
HS		 2393
2394 /*
2395 * Specify the largest window that will fit in opt0. The
2396 * remainder will be specified in the rx_data_ack.
2397 */
2398 win = ep->rcv_win >> 10;
d7990b0c
AB		 2399 if (win > RCV_BUFSIZ_M)
2400 win = RCV_BUFSIZ_M;
6c53e938 2401 opt0 = (nocong ? NO_CONG_F : 0) |
d7990b0c 2402 KEEP_ALIVE_F |
6c53e938 2403 DELACK_F |
d7990b0c
AB		 2404 WND_SCALE_V(wscale) |
2405 MSS_IDX_V(mtu_idx) |
2406 L2T_IDX_V(ep->l2t->idx) |
2407 TX_CHAN_V(ep->tx_chan) |
2408 SMAC_SEL_V(ep->smac_idx) |
6c53e938 2409 DSCP_V(ep->tos >> 2) |
d7990b0c
AB		 2410 ULP_MODE_V(ULP_MODE_TCPDDP) |
2411 RCV_BUFSIZ_V(win);
2412 opt2 = RX_CHANNEL_V(0) |
2413 RSS_QUEUE_VALID_F | RSS_QUEUE_V(ep->rss_qid);
cfdda9d7
SW		 2414
2415 if (enable_tcp_timestamps && req->tcpopt.tstamp)
6c53e938 2416 opt2 |= TSTAMPS_EN_F;
cfdda9d7 2417 if (enable_tcp_sack && req->tcpopt.sack)
6c53e938 2418 opt2 |= SACK_EN_F;
cfdda9d7 2419 if (wscale && enable_tcp_window_scaling)
d7990b0c 2420 opt2 |= WND_SCALE_EN_F;
5be78ee9
VP		 2421 if (enable_ecn) {
2422 const struct tcphdr *tcph;
2423 u32 hlen = ntohl(req->hdr_len);
2424
963cab50
H		 2425 if (CHELSIO_CHIP_VERSION(adapter_type) <= CHELSIO_T5)
2426 tcph = (const void *)(req + 1) + ETH_HDR_LEN_G(hlen) +
2427 IP_HDR_LEN_G(hlen);
2428 else
2429 tcph = (const void *)(req + 1) +
2430 T6_ETH_HDR_LEN_G(hlen) + T6_IP_HDR_LEN_G(hlen);
5be78ee9 2431 if (tcph->ece && tcph->cwr)
6c53e938 2432 opt2 |= CCTRL_ECN_V(1);
5be78ee9 2433 }
963cab50 2434 if (CHELSIO_CHIP_VERSION(adapter_type) > CHELSIO_T4) {
92e7ae71 2435 u32 isn = (prandom_u32() & ~7UL) - 1;
d7990b0c 2436 opt2 |= T5_OPT_2_VALID_F;
cf7fe64a 2437 opt2 |= CONG_CNTRL_V(CONG_ALG_TAHOE);
0b741047 2438 opt2 |= T5_ISS_F;
92e7ae71
HS		 2439 rpl5 = (void *)rpl;
2440 memset(&rpl5->iss, 0, roundup(sizeof(*rpl5)-sizeof(*rpl), 16));
2441 if (peer2peer)
2442 isn += 4;
2443 rpl5->iss = cpu_to_be32(isn);
2444 PDBG("%s iss %u\n", __func__, be32_to_cpu(rpl5->iss));
92e5011a 2445 }
cfdda9d7 2446
cfdda9d7
SW		 2447 rpl->opt0 = cpu_to_be64(opt0);
2448 rpl->opt2 = cpu_to_be32(opt2);
d4f1a5c6 2449 set_wr_txq(skb, CPL_PRIORITY_SETUP, ep->ctrlq_idx);
9dec900c 2450 t4_set_arp_err_handler(skb, ep, pass_accept_rpl_arp_failure);
cfdda9d7 2451
9dec900c 2452 return c4iw_l2t_send(&ep->com.dev->rdev, skb, ep->l2t);
cfdda9d7
SW		 2453}
2454
830662f6 2455static void reject_cr(struct c4iw_dev *dev, u32 hwtid, struct sk_buff *skb)
cfdda9d7 2456{
830662f6 2457 PDBG("%s c4iw_dev %p tid %u\n", __func__, dev, hwtid);
cfdda9d7
SW		 2458 BUG_ON(skb_cloned(skb));
2459 skb_trim(skb, sizeof(struct cpl_tid_release));
cfdda9d7
SW		 2460 release_tid(&dev->rdev, hwtid, skb);
2461 return;
2462}
2463
963cab50
H		 2464static void get_4tuple(struct cpl_pass_accept_req *req, enum chip_type type,
2465 int *iptype, __u8 *local_ip, __u8 *peer_ip,
cfdda9d7
SW		 2466 __be16 *local_port, __be16 *peer_port)
2467{
963cab50
H		 2468 int eth_len = (CHELSIO_CHIP_VERSION(type) <= CHELSIO_T5) ?
2469 ETH_HDR_LEN_G(be32_to_cpu(req->hdr_len)) :
2470 T6_ETH_HDR_LEN_G(be32_to_cpu(req->hdr_len));
2471 int ip_len = (CHELSIO_CHIP_VERSION(type) <= CHELSIO_T5) ?
2472 IP_HDR_LEN_G(be32_to_cpu(req->hdr_len)) :
2473 T6_IP_HDR_LEN_G(be32_to_cpu(req->hdr_len));
cfdda9d7 2474 struct iphdr *ip = (struct iphdr *)((u8 *)(req + 1) + eth_len);
830662f6 2475 struct ipv6hdr *ip6 = (struct ipv6hdr *)((u8 *)(req + 1) + eth_len);
cfdda9d7
SW		 2476 struct tcphdr *tcp = (struct tcphdr *)
2477 ((u8 *)(req + 1) + eth_len + ip_len);
2478
830662f6
VP		 2479 if (ip->version == 4) {
2480 PDBG("%s saddr 0x%x daddr 0x%x sport %u dport %u\n", __func__,
2481 ntohl(ip->saddr), ntohl(ip->daddr), ntohs(tcp->source),
2482 ntohs(tcp->dest));
2483 *iptype = 4;
2484 memcpy(peer_ip, &ip->saddr, 4);
2485 memcpy(local_ip, &ip->daddr, 4);
2486 } else {
2487 PDBG("%s saddr %pI6 daddr %pI6 sport %u dport %u\n", __func__,
2488 ip6->saddr.s6_addr, ip6->daddr.s6_addr, ntohs(tcp->source),
2489 ntohs(tcp->dest));
2490 *iptype = 6;
2491 memcpy(peer_ip, ip6->saddr.s6_addr, 16);
2492 memcpy(local_ip, ip6->daddr.s6_addr, 16);
2493 }
cfdda9d7
SW		 2494 *peer_port = tcp->source;
2495 *local_port = tcp->dest;
2496
2497 return;
2498}
2499
2500static int pass_accept_req(struct c4iw_dev *dev, struct sk_buff *skb)
2501{
793dad94 2502 struct c4iw_ep *child_ep = NULL, *parent_ep;
cfdda9d7 2503 struct cpl_pass_accept_req *req = cplhdr(skb);
6c53e938 2504 unsigned int stid = PASS_OPEN_TID_G(ntohl(req->tos_stid));
cfdda9d7
SW		 2505 struct tid_info *t = dev->rdev.lldi.tids;
2506 unsigned int hwtid = GET_TID(req);
2507 struct dst_entry *dst;
830662f6 2508 __u8 local_ip[16], peer_ip[16];
cfdda9d7 2509 __be16 local_port, peer_port;
84cc6ac6 2510 struct sockaddr_in6 *sin6;
3786cf18 2511 int err;
1cab775c 2512 u16 peer_mss = ntohs(req->tcpopt.mss);
830662f6 2513 int iptype;
92e7ae71 2514 unsigned short hdrs;
ac8e4c69 2515 u8 tos = PASS_OPEN_TOS_G(ntohl(req->tos_stid));
cfdda9d7 2516
f86fac79 2517 parent_ep = (struct c4iw_ep *)get_ep_from_stid(dev, stid);
1cab775c
VP		 2518 if (!parent_ep) {
2519 PDBG("%s connect request on invalid stid %d\n", __func__, stid);
2520 goto reject;
2521 }
1cab775c 2522
cfdda9d7 2523 if (state_read(&parent_ep->com) != LISTEN) {
6812faef 2524 PDBG("%s - listening ep not in LISTEN\n", __func__);
cfdda9d7
SW		 2525 goto reject;
2526 }
2527
963cab50
H		 2528 get_4tuple(req, parent_ep->com.dev->rdev.lldi.adapter_type, &iptype,
2529 local_ip, peer_ip, &local_port, &peer_port);
830662f6 2530
cfdda9d7 2531 /* Find output route */
830662f6
VP		 2532 if (iptype == 4) {
2533 PDBG("%s parent ep %p hwtid %u laddr %pI4 raddr %pI4 lport %d rport %d peer_mss %d\n"
2534 , __func__, parent_ep, hwtid,
2535 local_ip, peer_ip, ntohs(local_port),
2536 ntohs(peer_port), peer_mss);
2537 dst = find_route(dev, *(__be32 *)local_ip, *(__be32 *)peer_ip,
2538 local_port, peer_port,
ac8e4c69 2539 tos);
830662f6
VP		 2540 } else {
2541 PDBG("%s parent ep %p hwtid %u laddr %pI6 raddr %pI6 lport %d rport %d peer_mss %d\n"
2542 , __func__, parent_ep, hwtid,
2543 local_ip, peer_ip, ntohs(local_port),
2544 ntohs(peer_port), peer_mss);
2545 dst = find_route6(dev, local_ip, peer_ip, local_port, peer_port,
6c53e938 2546 PASS_OPEN_TOS_G(ntohl(req->tos_stid)),
830662f6
VP		 2547 ((struct sockaddr_in6 *)
2548 &parent_ep->com.local_addr)->sin6_scope_id);
2549 }
2550 if (!dst) {
cfdda9d7
SW		 2551 printk(KERN_ERR MOD "%s - failed to find dst entry!\n",
2552 __func__);
2553 goto reject;
2554 }
3786cf18
DM		 2555
2556 child_ep = alloc_ep(sizeof(*child_ep), GFP_KERNEL);
2557 if (!child_ep) {
2558 printk(KERN_ERR MOD "%s - failed to allocate ep entry!\n",
cfdda9d7
SW		 2559 __func__);
2560 dst_release(dst);
2561 goto reject;
2562 }
2563
963cab50 2564 err = import_ep(child_ep, iptype, peer_ip, dst, dev, false,
ac8e4c69 2565 parent_ep->com.dev->rdev.lldi.adapter_type, tos);
3786cf18
DM		 2566 if (err) {
2567 printk(KERN_ERR MOD "%s - failed to allocate l2t entry!\n",
cfdda9d7 2568 __func__);
cfdda9d7 2569 dst_release(dst);
3786cf18 2570 kfree(child_ep);
cfdda9d7
SW		 2571 goto reject;
2572 }
3786cf18 2573
92e7ae71
HS		 2574 hdrs = sizeof(struct iphdr) + sizeof(struct tcphdr) +
2575 ((enable_tcp_timestamps && req->tcpopt.tstamp) ? 12 : 0);
2576 if (peer_mss && child_ep->mtu > (peer_mss + hdrs))
2577 child_ep->mtu = peer_mss + hdrs;
1cab775c 2578
cfdda9d7
SW		 2579 state_set(&child_ep->com, CONNECTING);
2580 child_ep->com.dev = dev;
2581 child_ep->com.cm_id = NULL;
5b6b8fe6 2582
830662f6
VP		 2583 if (iptype == 4) {
2584 struct sockaddr_in *sin = (struct sockaddr_in *)
170003c8 2585 &child_ep->com.local_addr;
5b6b8fe6 2586
830662f6
VP		 2587 sin->sin_family = PF_INET;
2588 sin->sin_port = local_port;
2589 sin->sin_addr.s_addr = *(__be32 *)local_ip;
5b6b8fe6
SW		 2590
2591 sin = (struct sockaddr_in *)&child_ep->com.local_addr;
2592 sin->sin_family = PF_INET;
2593 sin->sin_port = ((struct sockaddr_in *)
2594 &parent_ep->com.local_addr)->sin_port;
2595 sin->sin_addr.s_addr = *(__be32 *)local_ip;
2596
170003c8 2597 sin = (struct sockaddr_in *)&child_ep->com.remote_addr;
830662f6
VP		 2598 sin->sin_family = PF_INET;
2599 sin->sin_port = peer_port;
2600 sin->sin_addr.s_addr = *(__be32 *)peer_ip;
2601 } else {
170003c8 2602 sin6 = (struct sockaddr_in6 *)&child_ep->com.local_addr;
830662f6
VP		 2603 sin6->sin6_family = PF_INET6;
2604 sin6->sin6_port = local_port;
2605 memcpy(sin6->sin6_addr.s6_addr, local_ip, 16);
5b6b8fe6
SW		 2606
2607 sin6 = (struct sockaddr_in6 *)&child_ep->com.local_addr;
2608 sin6->sin6_family = PF_INET6;
2609 sin6->sin6_port = ((struct sockaddr_in6 *)
2610 &parent_ep->com.local_addr)->sin6_port;
2611 memcpy(sin6->sin6_addr.s6_addr, local_ip, 16);
2612
170003c8 2613 sin6 = (struct sockaddr_in6 *)&child_ep->com.remote_addr;
830662f6
VP		 2614 sin6->sin6_family = PF_INET6;
2615 sin6->sin6_port = peer_port;
2616 memcpy(sin6->sin6_addr.s6_addr, peer_ip, 16);
2617 }
5b6b8fe6 2618
cfdda9d7
SW		 2619 c4iw_get_ep(&parent_ep->com);
2620 child_ep->parent_ep = parent_ep;
ac8e4c69 2621 child_ep->tos = tos;
cfdda9d7
SW		 2622 child_ep->dst = dst;
2623 child_ep->hwtid = hwtid;
cfdda9d7
SW		 2624
2625 PDBG("%s tx_chan %u smac_idx %u rss_qid %u\n", __func__,
3786cf18 2626 child_ep->tx_chan, child_ep->smac_idx, child_ep->rss_qid);
cfdda9d7
SW		 2627
2628 init_timer(&child_ep->timer);
2629 cxgb4_insert_tid(t, child_ep, hwtid);
944661dd 2630 insert_ep_tid(child_ep);
9dec900c
H		 2631 if (accept_cr(child_ep, skb, req)) {
2632 c4iw_put_ep(&parent_ep->com);
2633 release_ep_resources(child_ep);
2634 } else {
2635 set_bit(PASS_ACCEPT_REQ, &child_ep->com.history);
2636 }
84cc6ac6 2637 if (iptype == 6) {
170003c8 2638 sin6 = (struct sockaddr_in6 *)&child_ep->com.local_addr;
84cc6ac6
H		 2639 cxgb4_clip_get(child_ep->com.dev->rdev.lldi.ports[0],
2640 (const u32 *)&sin6->sin6_addr.s6_addr, 1);
2641 }
cfdda9d7
SW		 2642 goto out;
2643reject:
830662f6 2644 reject_cr(dev, hwtid, skb);
f86fac79
H		 2645 if (parent_ep)
2646 c4iw_put_ep(&parent_ep->com);
cfdda9d7
SW		 2647out:
2648 return 0;
2649}
2650
2651static int pass_establish(struct c4iw_dev *dev, struct sk_buff *skb)
2652{
2653 struct c4iw_ep *ep;
2654 struct cpl_pass_establish *req = cplhdr(skb);
cfdda9d7 2655 unsigned int tid = GET_TID(req);
fef4422d 2656 int ret;
cfdda9d7 2657
944661dd 2658 ep = get_ep_from_tid(dev, tid);
cfdda9d7
SW		 2659 PDBG("%s ep %p tid %u\n", __func__, ep, ep->hwtid);
2660 ep->snd_seq = be32_to_cpu(req->snd_isn);
2661 ep->rcv_seq = be32_to_cpu(req->rcv_isn);
2662
1cab775c
VP		 2663 PDBG("%s ep %p hwtid %u tcp_opt 0x%02x\n", __func__, ep, tid,
2664 ntohs(req->tcp_opt));
2665
cfdda9d7
SW		 2666 set_emss(ep, ntohs(req->tcp_opt));
2667
2668 dst_confirm(ep->dst);
fef4422d
H		 2669 mutex_lock(&ep->com.mutex);
2670 ep->com.state = MPA_REQ_WAIT;
cfdda9d7 2671 start_ep_timer(ep);
793dad94 2672 set_bit(PASS_ESTAB, &ep->com.history);
fef4422d
H		 2673 ret = send_flowc(ep, skb);
2674 mutex_unlock(&ep->com.mutex);
2675 if (ret)
2676 c4iw_ep_disconnect(ep, 1, GFP_KERNEL);
944661dd 2677 c4iw_put_ep(&ep->com);
cfdda9d7
SW		 2678
2679 return 0;
2680}
2681
2682static int peer_close(struct c4iw_dev *dev, struct sk_buff *skb)
2683{
2684 struct cpl_peer_close *hdr = cplhdr(skb);
2685 struct c4iw_ep *ep;
2686 struct c4iw_qp_attributes attrs;
cfdda9d7
SW		 2687 int disconnect = 1;
2688 int release = 0;
cfdda9d7 2689 unsigned int tid = GET_TID(hdr);
8da7e7a5 2690 int ret;
cfdda9d7 2691
944661dd
H		 2692 ep = get_ep_from_tid(dev, tid);
2693 if (!ep)
2694 return 0;
2695
cfdda9d7
SW		 2696 PDBG("%s ep %p tid %u\n", __func__, ep, ep->hwtid);
2697 dst_confirm(ep->dst);
2698
793dad94 2699 set_bit(PEER_CLOSE, &ep->com.history);
2f5b48c3 2700 mutex_lock(&ep->com.mutex);
cfdda9d7
SW		 2701 switch (ep->com.state) {
2702 case MPA_REQ_WAIT:
2703 __state_set(&ep->com, CLOSING);
2704 break;
2705 case MPA_REQ_SENT:
2706 __state_set(&ep->com, CLOSING);
2707 connect_reply_upcall(ep, -ECONNRESET);
2708 break;
2709 case MPA_REQ_RCVD:
2710
2711 /*
2712 * We're gonna mark this puppy DEAD, but keep
2713 * the reference on it until the ULP accepts or
2714 * rejects the CR. Also wake up anyone waiting
2715 * in rdma connection migration (see c4iw_accept_cr()).
2716 */
2717 __state_set(&ep->com, CLOSING);
cfdda9d7 2718 PDBG("waking up ep %p tid %u\n", ep, ep->hwtid);
d9594d99 2719 c4iw_wake_up(&ep->com.wr_wait, -ECONNRESET);
cfdda9d7
SW		 2720 break;
2721 case MPA_REP_SENT:
2722 __state_set(&ep->com, CLOSING);
cfdda9d7 2723 PDBG("waking up ep %p tid %u\n", ep, ep->hwtid);
d9594d99 2724 c4iw_wake_up(&ep->com.wr_wait, -ECONNRESET);
cfdda9d7
SW		 2725 break;
2726 case FPDU_MODE:
ca5a2202 2727 start_ep_timer(ep);
cfdda9d7 2728 __state_set(&ep->com, CLOSING);
30c95c2d 2729 attrs.next_state = C4IW_QP_STATE_CLOSING;
8da7e7a5 2730 ret = c4iw_modify_qp(ep->com.qp->rhp, ep->com.qp,
30c95c2d 2731 C4IW_QP_ATTR_NEXT_STATE, &attrs, 1);
8da7e7a5
SW		 2732 if (ret != -ECONNRESET) {
2733 peer_close_upcall(ep);
2734 disconnect = 1;
2735 }
cfdda9d7
SW		 2736 break;
2737 case ABORTING:
2738 disconnect = 0;
2739 break;
2740 case CLOSING:
2741 __state_set(&ep->com, MORIBUND);
2742 disconnect = 0;
2743 break;
2744 case MORIBUND:
b33bd0cb 2745 (void)stop_ep_timer(ep);
cfdda9d7
SW		 2746 if (ep->com.cm_id && ep->com.qp) {
2747 attrs.next_state = C4IW_QP_STATE_IDLE;
2748 c4iw_modify_qp(ep->com.qp->rhp, ep->com.qp,
2749 C4IW_QP_ATTR_NEXT_STATE, &attrs, 1);
2750 }
be13b2df 2751 close_complete_upcall(ep, 0);
cfdda9d7
SW		 2752 __state_set(&ep->com, DEAD);
2753 release = 1;
2754 disconnect = 0;
2755 break;
2756 case DEAD:
2757 disconnect = 0;
2758 break;
2759 default:
2760 BUG_ON(1);
2761 }
2f5b48c3 2762 mutex_unlock(&ep->com.mutex);
cfdda9d7
SW		 2763 if (disconnect)
2764 c4iw_ep_disconnect(ep, 0, GFP_KERNEL);
2765 if (release)
2766 release_ep_resources(ep);
944661dd 2767 c4iw_put_ep(&ep->com);
cfdda9d7
SW		 2768 return 0;
2769}
2770
cfdda9d7
SW		 2771static int peer_abort(struct c4iw_dev *dev, struct sk_buff *skb)
2772{
2773 struct cpl_abort_req_rss *req = cplhdr(skb);
2774 struct c4iw_ep *ep;
2775 struct cpl_abort_rpl *rpl;
2776 struct sk_buff *rpl_skb;
2777 struct c4iw_qp_attributes attrs;
2778 int ret;
2779 int release = 0;
cfdda9d7 2780 unsigned int tid = GET_TID(req);
cfdda9d7 2781
944661dd
H		 2782 ep = get_ep_from_tid(dev, tid);
2783 if (!ep)
2784 return 0;
2785
7a2cea2a 2786 if (is_neg_adv(req->status)) {
179d03bb
H		 2787 PDBG("%s Negative advice on abort- tid %u status %d (%s)\n",
2788 __func__, ep->hwtid, req->status,
2789 neg_adv_str(req->status));
2790 ep->stats.abort_neg_adv++;
2791 mutex_lock(&dev->rdev.stats.lock);
2792 dev->rdev.stats.neg_adv++;
2793 mutex_unlock(&dev->rdev.stats.lock);
944661dd 2794 goto deref_ep;
cfdda9d7 2795 }
cfdda9d7
SW		 2796 PDBG("%s ep %p tid %u state %u\n", __func__, ep, ep->hwtid,
2797 ep->com.state);
793dad94 2798 set_bit(PEER_ABORT, &ep->com.history);
2f5b48c3
SW		 2799
2800 /*
2801 * Wake up any threads in rdma_init() or rdma_fini().
d2fe99e8
KS		 2802 * However, this is not needed if com state is just
2803 * MPA_REQ_SENT
2f5b48c3 2804 */
d2fe99e8
KS		 2805 if (ep->com.state != MPA_REQ_SENT)
2806 c4iw_wake_up(&ep->com.wr_wait, -ECONNRESET);
2f5b48c3
SW		 2807
2808 mutex_lock(&ep->com.mutex);
cfdda9d7
SW		 2809 switch (ep->com.state) {
2810 case CONNECTING:
9dec900c 2811 c4iw_put_ep(&ep->parent_ep->com);
cfdda9d7
SW		 2812 break;
2813 case MPA_REQ_WAIT:
b33bd0cb 2814 (void)stop_ep_timer(ep);
cfdda9d7
SW		 2815 break;
2816 case MPA_REQ_SENT:
b33bd0cb 2817 (void)stop_ep_timer(ep);
fe7e0a4d 2818 if (mpa_rev == 1 || (mpa_rev == 2 && ep->tried_with_mpa_v1))
d2fe99e8
KS		 2819 connect_reply_upcall(ep, -ECONNRESET);
2820 else {
2821 /*
2822 * we just don't send notification upwards because we
2823 * want to retry with mpa_v1 without upper layers even
2824 * knowing it.
2825 *
2826 * do some housekeeping so as to re-initiate the
2827 * connection
2828 */
2829 PDBG("%s: mpa_rev=%d. Retrying with mpav1\n", __func__,
2830 mpa_rev);
2831 ep->retry_with_mpa_v1 = 1;
2832 }
cfdda9d7
SW		 2833 break;
2834 case MPA_REP_SENT:
cfdda9d7
SW		 2835 break;
2836 case MPA_REQ_RCVD:
cfdda9d7
SW		 2837 break;
2838 case MORIBUND:
2839 case CLOSING:
ca5a2202 2840 stop_ep_timer(ep);
cfdda9d7
SW		 2841 /*FALLTHROUGH*/
2842 case FPDU_MODE:
2843 if (ep->com.cm_id && ep->com.qp) {
2844 attrs.next_state = C4IW_QP_STATE_ERROR;
2845 ret = c4iw_modify_qp(ep->com.qp->rhp,
2846 ep->com.qp, C4IW_QP_ATTR_NEXT_STATE,
2847 &attrs, 1);
2848 if (ret)
2849 printk(KERN_ERR MOD
2850 "%s - qp <- error failed!\n",
2851 __func__);
2852 }
2853 peer_abort_upcall(ep);
2854 break;
2855 case ABORTING:
2856 break;
2857 case DEAD:
2858 PDBG("%s PEER_ABORT IN DEAD STATE!!!!\n", __func__);
2f5b48c3 2859 mutex_unlock(&ep->com.mutex);
944661dd 2860 goto deref_ep;
cfdda9d7
SW		 2861 default:
2862 BUG_ON(1);
2863 break;
2864 }
2865 dst_confirm(ep->dst);
2866 if (ep->com.state != ABORTING) {
2867 __state_set(&ep->com, DEAD);
d2fe99e8
KS		 2868 /* we don't release if we want to retry with mpa_v1 */
2869 if (!ep->retry_with_mpa_v1)
2870 release = 1;
cfdda9d7 2871 }
2f5b48c3 2872 mutex_unlock(&ep->com.mutex);
cfdda9d7
SW		 2873
2874 rpl_skb = get_skb(skb, sizeof(*rpl), GFP_KERNEL);
2875 if (!rpl_skb) {
2876 printk(KERN_ERR MOD "%s - cannot allocate skb!\n",
2877 __func__);
2878 release = 1;
2879 goto out;
2880 }
2881 set_wr_txq(skb, CPL_PRIORITY_DATA, ep->txq_idx);
2882 rpl = (struct cpl_abort_rpl *) skb_put(rpl_skb, sizeof(*rpl));
2883 INIT_TP_WR(rpl, ep->hwtid);
2884 OPCODE_TID(rpl) = cpu_to_be32(MK_OPCODE_TID(CPL_ABORT_RPL, ep->hwtid));
2885 rpl->cmd = CPL_ABORT_NO_RST;
2886 c4iw_ofld_send(&ep->com.dev->rdev, rpl_skb);
2887out:
cfdda9d7
SW		 2888 if (release)
2889 release_ep_resources(ep);
fe7e0a4d 2890 else if (ep->retry_with_mpa_v1) {
84cc6ac6
H		 2891 if (ep->com.remote_addr.ss_family == AF_INET6) {
2892 struct sockaddr_in6 *sin6 =
2893 (struct sockaddr_in6 *)
170003c8 2894 &ep->com.local_addr;
84cc6ac6
H		 2895 cxgb4_clip_release(
2896 ep->com.dev->rdev.lldi.ports[0],
2897 (const u32 *)&sin6->sin6_addr.s6_addr,
2898 1);
2899 }
fe7e0a4d 2900 remove_handle(ep->com.dev, &ep->com.dev->hwtid_idr, ep->hwtid);
d2fe99e8
KS		 2901 cxgb4_remove_tid(ep->com.dev->rdev.lldi.tids, 0, ep->hwtid);
2902 dst_release(ep->dst);
2903 cxgb4_l2t_release(ep->l2t);
2904 c4iw_reconnect(ep);
2905 }
2906
944661dd
H		 2907deref_ep:
2908 c4iw_put_ep(&ep->com);
2909 /* Dereferencing ep, referenced in peer_abort_intr() */
2910 c4iw_put_ep(&ep->com);
cfdda9d7
SW		 2911 return 0;
2912}
2913
2914static int close_con_rpl(struct c4iw_dev *dev, struct sk_buff *skb)
2915{
2916 struct c4iw_ep *ep;
2917 struct c4iw_qp_attributes attrs;
2918 struct cpl_close_con_rpl *rpl = cplhdr(skb);
cfdda9d7 2919 int release = 0;
cfdda9d7 2920 unsigned int tid = GET_TID(rpl);
cfdda9d7 2921
944661dd
H		 2922 ep = get_ep_from_tid(dev, tid);
2923 if (!ep)
2924 return 0;
cfdda9d7
SW		 2925
2926 PDBG("%s ep %p tid %u\n", __func__, ep, ep->hwtid);
2927 BUG_ON(!ep);
2928
2929 /* The cm_id may be null if we failed to connect */
2f5b48c3 2930 mutex_lock(&ep->com.mutex);
9ca6f7cf 2931 set_bit(CLOSE_CON_RPL, &ep->com.history);
cfdda9d7
SW		 2932 switch (ep->com.state) {
2933 case CLOSING:
2934 __state_set(&ep->com, MORIBUND);
2935 break;
2936 case MORIBUND:
b33bd0cb 2937 (void)stop_ep_timer(ep);
cfdda9d7
SW		 2938 if ((ep->com.cm_id) && (ep->com.qp)) {
2939 attrs.next_state = C4IW_QP_STATE_IDLE;
2940 c4iw_modify_qp(ep->com.qp->rhp,
2941 ep->com.qp,
2942 C4IW_QP_ATTR_NEXT_STATE,
2943 &attrs, 1);
2944 }
be13b2df 2945 close_complete_upcall(ep, 0);
cfdda9d7
SW		 2946 __state_set(&ep->com, DEAD);
2947 release = 1;
2948 break;
2949 case ABORTING:
2950 case DEAD:
2951 break;
2952 default:
2953 BUG_ON(1);
2954 break;
2955 }
2f5b48c3 2956 mutex_unlock(&ep->com.mutex);
cfdda9d7
SW		 2957 if (release)
2958 release_ep_resources(ep);
944661dd 2959 c4iw_put_ep(&ep->com);
cfdda9d7
SW		 2960 return 0;
2961}
2962
2963static int terminate(struct c4iw_dev *dev, struct sk_buff *skb)
2964{
0e42c1f4 2965 struct cpl_rdma_terminate *rpl = cplhdr(skb);
0e42c1f4
SW		 2966 unsigned int tid = GET_TID(rpl);
2967 struct c4iw_ep *ep;
2968 struct c4iw_qp_attributes attrs;
cfdda9d7 2969
944661dd 2970 ep = get_ep_from_tid(dev, tid);
0e42c1f4 2971 BUG_ON(!ep);
cfdda9d7 2972
30c95c2d 2973 if (ep && ep->com.qp) {
0e42c1f4
SW		 2974 printk(KERN_WARNING MOD "TERM received tid %u qpid %u\n", tid,
2975 ep->com.qp->wq.sq.qid);
2976 attrs.next_state = C4IW_QP_STATE_TERMINATE;
2977 c4iw_modify_qp(ep->com.qp->rhp, ep->com.qp,
2978 C4IW_QP_ATTR_NEXT_STATE, &attrs, 1);
2979 } else
30c95c2d 2980 printk(KERN_WARNING MOD "TERM received tid %u no ep/qp\n", tid);
944661dd 2981 c4iw_put_ep(&ep->com);
cfdda9d7 2982
cfdda9d7
SW		 2983 return 0;
2984}
2985
2986/*
2987 * Upcall from the adapter indicating data has been transmitted.
2988 * For us its just the single MPA request or reply. We can now free
2989 * the skb holding the mpa message.
2990 */
2991static int fw4_ack(struct c4iw_dev *dev, struct sk_buff *skb)
2992{
2993 struct c4iw_ep *ep;
2994 struct cpl_fw4_ack *hdr = cplhdr(skb);
2995 u8 credits = hdr->credits;
2996 unsigned int tid = GET_TID(hdr);
cfdda9d7
SW		 2997
2998
944661dd
H		 2999 ep = get_ep_from_tid(dev, tid);
3000 if (!ep)
3001 return 0;
cfdda9d7
SW		 3002 PDBG("%s ep %p tid %u credits %u\n", __func__, ep, ep->hwtid, credits);
3003 if (credits == 0) {
aa1ad260
JP		 3004 PDBG("%s 0 credit ack ep %p tid %u state %u\n",
3005 __func__, ep, ep->hwtid, state_read(&ep->com));
944661dd 3006 goto out;
cfdda9d7
SW		 3007 }
3008
3009 dst_confirm(ep->dst);
3010 if (ep->mpa_skb) {
3011 PDBG("%s last streaming msg ack ep %p tid %u state %u "
3012 "initiator %u freeing skb\n", __func__, ep, ep->hwtid,
3013 state_read(&ep->com), ep->mpa_attr.initiator ? 1 : 0);
3014 kfree_skb(ep->mpa_skb);
3015 ep->mpa_skb = NULL;
e4b76a2a
H		 3016 mutex_lock(&ep->com.mutex);
3017 if (test_bit(STOP_MPA_TIMER, &ep->com.flags))
3018 stop_ep_timer(ep);
3019 mutex_unlock(&ep->com.mutex);
cfdda9d7 3020 }
944661dd
H		 3021out:
3022 c4iw_put_ep(&ep->com);
cfdda9d7
SW		 3023 return 0;
3024}
3025
cfdda9d7
SW		 3026int c4iw_reject_cr(struct iw_cm_id *cm_id, const void *pdata, u8 pdata_len)
3027{
a7db89eb
SW		 3028 int err = 0;
3029 int disconnect = 0;
cfdda9d7
SW		 3030 struct c4iw_ep *ep = to_ep(cm_id);
3031 PDBG("%s ep %p tid %u\n", __func__, ep, ep->hwtid);
3032
a7db89eb 3033 mutex_lock(&ep->com.mutex);
e8667a9b 3034 if (ep->com.state != MPA_REQ_RCVD) {
a7db89eb 3035 mutex_unlock(&ep->com.mutex);
cfdda9d7
SW		 3036 c4iw_put_ep(&ep->com);
3037 return -ECONNRESET;
3038 }
793dad94 3039 set_bit(ULP_REJECT, &ep->com.history);
cfdda9d7 3040 if (mpa_rev == 0)
eaf4c6d4 3041 disconnect = 2;
cfdda9d7
SW		 3042 else {
3043 err = send_mpa_reject(ep, pdata, pdata_len);
a7db89eb 3044 disconnect = 1;
cfdda9d7 3045 }
a7db89eb 3046 mutex_unlock(&ep->com.mutex);
e4b76a2a
H		 3047 if (disconnect) {
3048 stop_ep_timer(ep);
eaf4c6d4 3049 err = c4iw_ep_disconnect(ep, disconnect == 2, GFP_KERNEL);
e4b76a2a 3050 }
cfdda9d7
SW		 3051 c4iw_put_ep(&ep->com);
3052 return 0;
3053}
3054
3055int c4iw_accept_cr(struct iw_cm_id *cm_id, struct iw_cm_conn_param *conn_param)
3056{
3057 int err;
3058 struct c4iw_qp_attributes attrs;
3059 enum c4iw_qp_attr_mask mask;
3060 struct c4iw_ep *ep = to_ep(cm_id);
3061 struct c4iw_dev *h = to_c4iw_dev(cm_id->device);
3062 struct c4iw_qp *qp = get_qhp(h, conn_param->qpn);
eaf4c6d4 3063 int abort = 0;
cfdda9d7
SW		 3064
3065 PDBG("%s ep %p tid %u\n", __func__, ep, ep->hwtid);
a7db89eb
SW		 3066
3067 mutex_lock(&ep->com.mutex);
e8667a9b 3068 if (ep->com.state != MPA_REQ_RCVD) {
cfdda9d7 3069 err = -ECONNRESET;
eaf4c6d4 3070 goto err_out;
cfdda9d7
SW		 3071 }
3072
cfdda9d7
SW		 3073 BUG_ON(!qp);
3074
793dad94 3075 set_bit(ULP_ACCEPT, &ep->com.history);
4c2c5763
HS		 3076 if ((conn_param->ord > cur_max_read_depth(ep->com.dev)) ||
3077 (conn_param->ird > cur_max_read_depth(ep->com.dev))) {
cfdda9d7 3078 err = -EINVAL;
eaf4c6d4 3079 goto err_abort;
cfdda9d7
SW		 3080 }
3081
d2fe99e8
KS		 3082 if (ep->mpa_attr.version == 2 && ep->mpa_attr.enhanced_rdma_conn) {
3083 if (conn_param->ord > ep->ird) {
4c2c5763
HS		 3084 if (RELAXED_IRD_NEGOTIATION) {
3085 ep->ord = ep->ird;
3086 } else {
3087 ep->ird = conn_param->ird;
3088 ep->ord = conn_param->ord;
3089 send_mpa_reject(ep, conn_param->private_data,
3090 conn_param->private_data_len);
4c2c5763 3091 err = -ENOMEM;
eaf4c6d4 3092 goto err_abort;
4c2c5763 3093 }
d2fe99e8 3094 }
4c2c5763
HS		 3095 if (conn_param->ird < ep->ord) {
3096 if (RELAXED_IRD_NEGOTIATION &&
3097 ep->ord <= h->rdev.lldi.max_ordird_qp) {
3098 conn_param->ird = ep->ord;
3099 } else {
d2fe99e8 3100 err = -ENOMEM;
eaf4c6d4 3101 goto err_abort;
d2fe99e8
KS		 3102 }
3103 }
d2fe99e8 3104 }
cfdda9d7
SW		 3105 ep->ird = conn_param->ird;
3106 ep->ord = conn_param->ord;
3107
4c2c5763 3108 if (ep->mpa_attr.version == 1) {
d2fe99e8
KS		 3109 if (peer2peer && ep->ird == 0)
3110 ep->ird = 1;
4c2c5763
HS		 3111 } else {
3112 if (peer2peer &&
3113 (ep->mpa_attr.p2p_type != FW_RI_INIT_P2PTYPE_DISABLED) &&
f57b780c 3114 (p2p_type == FW_RI_INIT_P2PTYPE_READ_REQ) && ep->ird == 0)
4c2c5763
HS		 3115 ep->ird = 1;
3116 }
cfdda9d7
SW		 3117
3118 PDBG("%s %d ird %d ord %d\n", __func__, __LINE__, ep->ird, ep->ord);
3119
d2fe99e8 3120 ep->com.cm_id = cm_id;
9ca6f7cf 3121 ref_cm_id(&ep->com);
d2fe99e8 3122 ep->com.qp = qp;
325abead 3123 ref_qp(ep);
d2fe99e8 3124
cfdda9d7
SW		 3125 /* bind QP to EP and move to RTS */
3126 attrs.mpa_attr = ep->mpa_attr;
3127 attrs.max_ird = ep->ird;
3128 attrs.max_ord = ep->ord;
3129 attrs.llp_stream_handle = ep;
3130 attrs.next_state = C4IW_QP_STATE_RTS;
3131
3132 /* bind QP and TID with INIT_WR */
3133 mask = C4IW_QP_ATTR_NEXT_STATE |
3134 C4IW_QP_ATTR_LLP_STREAM_HANDLE |
3135 C4IW_QP_ATTR_MPA_ATTR |
3136 C4IW_QP_ATTR_MAX_IRD |
3137 C4IW_QP_ATTR_MAX_ORD;
3138
3139 err = c4iw_modify_qp(ep->com.qp->rhp,
3140 ep->com.qp, mask, &attrs, 1);
3141 if (err)
eaf4c6d4 3142 goto err_deref_cm_id;
e4b76a2a
H		 3143
3144 set_bit(STOP_MPA_TIMER, &ep->com.flags);
cfdda9d7
SW		 3145 err = send_mpa_reply(ep, conn_param->private_data,
3146 conn_param->private_data_len);
3147 if (err)
eaf4c6d4 3148 goto err_deref_cm_id;
cfdda9d7 3149
a7db89eb 3150 __state_set(&ep->com, FPDU_MODE);
cfdda9d7 3151 established_upcall(ep);
a7db89eb 3152 mutex_unlock(&ep->com.mutex);
cfdda9d7
SW		 3153 c4iw_put_ep(&ep->com);
3154 return 0;
eaf4c6d4 3155err_deref_cm_id:
9ca6f7cf 3156 deref_cm_id(&ep->com);
eaf4c6d4
H		 3157err_abort:
3158 abort = 1;
3159err_out:
a7db89eb 3160 mutex_unlock(&ep->com.mutex);
eaf4c6d4
H		 3161 if (abort)
3162 c4iw_ep_disconnect(ep, 1, GFP_KERNEL);
cfdda9d7
SW		 3163 c4iw_put_ep(&ep->com);
3164 return err;
3165}
3166
830662f6
VP		 3167static int pick_local_ipaddrs(struct c4iw_dev *dev, struct iw_cm_id *cm_id)
3168{
3169 struct in_device *ind;
3170 int found = 0;
170003c8
SW		 3171 struct sockaddr_in *laddr = (struct sockaddr_in *)&cm_id->m_local_addr;
3172 struct sockaddr_in *raddr = (struct sockaddr_in *)&cm_id->m_remote_addr;
830662f6
VP		 3173
3174 ind = in_dev_get(dev->rdev.lldi.ports[0]);
3175 if (!ind)
3176 return -EADDRNOTAVAIL;
3177 for_primary_ifa(ind) {
3178 laddr->sin_addr.s_addr = ifa->ifa_address;
3179 raddr->sin_addr.s_addr = ifa->ifa_address;
3180 found = 1;
3181 break;
3182 }
3183 endfor_ifa(ind);
3184 in_dev_put(ind);
3185 return found ? 0 : -EADDRNOTAVAIL;
3186}
3187
3188static int get_lladdr(struct net_device *dev, struct in6_addr *addr,
3189 unsigned char banned_flags)
3190{
3191 struct inet6_dev *idev;
3192 int err = -EADDRNOTAVAIL;
3193
3194 rcu_read_lock();
3195 idev = __in6_dev_get(dev);
3196 if (idev != NULL) {
3197 struct inet6_ifaddr *ifp;
3198
3199 read_lock_bh(&idev->lock);
3200 list_for_each_entry(ifp, &idev->addr_list, if_list) {
3201 if (ifp->scope == IFA_LINK &&
3202 !(ifp->flags & banned_flags)) {
3203 memcpy(addr, &ifp->addr, 16);
3204 err = 0;
3205 break;
3206 }
3207 }
3208 read_unlock_bh(&idev->lock);
3209 }
3210 rcu_read_unlock();
3211 return err;
3212}
3213
3214static int pick_local_ip6addrs(struct c4iw_dev *dev, struct iw_cm_id *cm_id)
3215{
3216 struct in6_addr uninitialized_var(addr);
170003c8
SW		 3217 struct sockaddr_in6 *la6 = (struct sockaddr_in6 *)&cm_id->m_local_addr;
3218 struct sockaddr_in6 *ra6 = (struct sockaddr_in6 *)&cm_id->m_remote_addr;
830662f6 3219
54b9a96f 3220 if (!get_lladdr(dev->rdev.lldi.ports[0], &addr, IFA_F_TENTATIVE)) {
830662f6
VP		 3221 memcpy(la6->sin6_addr.s6_addr, &addr, 16);
3222 memcpy(ra6->sin6_addr.s6_addr, &addr, 16);
3223 return 0;
3224 }
3225 return -EADDRNOTAVAIL;
3226}
3227
cfdda9d7
SW		 3228int c4iw_connect(struct iw_cm_id *cm_id, struct iw_cm_conn_param *conn_param)
3229{
cfdda9d7
SW		 3230 struct c4iw_dev *dev = to_c4iw_dev(cm_id->device);
3231 struct c4iw_ep *ep;
3786cf18 3232 int err = 0;
9eccfe10
SW		 3233 struct sockaddr_in *laddr;
3234 struct sockaddr_in *raddr;
3235 struct sockaddr_in6 *laddr6;
3236 struct sockaddr_in6 *raddr6;
830662f6
VP		 3237 __u8 *ra;
3238 int iptype;
cfdda9d7 3239
4c2c5763
HS		 3240 if ((conn_param->ord > cur_max_read_depth(dev)) ||
3241 (conn_param->ird > cur_max_read_depth(dev))) {
be4c9bad
RD		 3242 err = -EINVAL;
3243 goto out;
3244 }
cfdda9d7
SW		 3245 ep = alloc_ep(sizeof(*ep), GFP_KERNEL);
3246 if (!ep) {
3247 printk(KERN_ERR MOD "%s - cannot alloc ep.\n", __func__);
3248 err = -ENOMEM;
3249 goto out;
3250 }
3251 init_timer(&ep->timer);
3252 ep->plen = conn_param->private_data_len;
3253 if (ep->plen)
3254 memcpy(ep->mpa_pkt + sizeof(struct mpa_message),
3255 conn_param->private_data, ep->plen);
3256 ep->ird = conn_param->ird;
3257 ep->ord = conn_param->ord;
3258
3259 if (peer2peer && ep->ord == 0)
3260 ep->ord = 1;
3261
cfdda9d7 3262 ep->com.cm_id = cm_id;
9ca6f7cf
H		 3263 ref_cm_id(&ep->com);
3264 ep->com.dev = dev;
cfdda9d7 3265 ep->com.qp = get_qhp(dev, conn_param->qpn);
830662f6
VP		 3266 if (!ep->com.qp) {
3267 PDBG("%s qpn 0x%x not found!\n", __func__, conn_param->qpn);
3268 err = -EINVAL;
9eccfe10 3269 goto fail1;
830662f6 3270 }
325abead 3271 ref_qp(ep);
cfdda9d7
SW		 3272 PDBG("%s qpn 0x%x qp %p cm_id %p\n", __func__, conn_param->qpn,
3273 ep->com.qp, cm_id);
3274
3275 /*
3276 * Allocate an active TID to initiate a TCP connection.
3277 */
3278 ep->atid = cxgb4_alloc_atid(dev->rdev.lldi.tids, ep);
3279 if (ep->atid == -1) {
3280 printk(KERN_ERR MOD "%s - cannot alloc atid.\n", __func__);
3281 err = -ENOMEM;
9eccfe10 3282 goto fail1;
cfdda9d7 3283 }
793dad94 3284 insert_handle(dev, &dev->atid_idr, ep, ep->atid);
cfdda9d7 3285
170003c8 3286 memcpy(&ep->com.local_addr, &cm_id->m_local_addr,
9eccfe10 3287 sizeof(ep->com.local_addr));
170003c8 3288 memcpy(&ep->com.remote_addr, &cm_id->m_remote_addr,
9eccfe10
SW		 3289 sizeof(ep->com.remote_addr));
3290
170003c8
SW		 3291 laddr = (struct sockaddr_in *)&ep->com.local_addr;
3292 raddr = (struct sockaddr_in *)&ep->com.remote_addr;
3293 laddr6 = (struct sockaddr_in6 *)&ep->com.local_addr;
3294 raddr6 = (struct sockaddr_in6 *) &ep->com.remote_addr;
9eccfe10 3295
170003c8 3296 if (cm_id->m_remote_addr.ss_family == AF_INET) {
830662f6
VP		 3297 iptype = 4;
3298 ra = (__u8 *)&raddr->sin_addr;
cfdda9d7 3299
830662f6
VP		 3300 /*
3301 * Handle loopback requests to INADDR_ANY.
3302 */
3303 if ((__force int)raddr->sin_addr.s_addr == INADDR_ANY) {
3304 err = pick_local_ipaddrs(dev, cm_id);
3305 if (err)
9eccfe10 3306 goto fail1;
830662f6
VP		 3307 }
3308
3309 /* find a route */
3310 PDBG("%s saddr %pI4 sport 0x%x raddr %pI4 rport 0x%x\n",
3311 __func__, &laddr->sin_addr, ntohs(laddr->sin_port),
3312 ra, ntohs(raddr->sin_port));
3313 ep->dst = find_route(dev, laddr->sin_addr.s_addr,
3314 raddr->sin_addr.s_addr, laddr->sin_port,
ac8e4c69 3315 raddr->sin_port, cm_id->tos);
830662f6
VP		 3316 } else {
3317 iptype = 6;
3318 ra = (__u8 *)&raddr6->sin6_addr;
3319
3320 /*
3321 * Handle loopback requests to INADDR_ANY.
3322 */
3323 if (ipv6_addr_type(&raddr6->sin6_addr) == IPV6_ADDR_ANY) {
3324 err = pick_local_ip6addrs(dev, cm_id);
3325 if (err)
9eccfe10 3326 goto fail1;
830662f6
VP		 3327 }
3328
3329 /* find a route */
3330 PDBG("%s saddr %pI6 sport 0x%x raddr %pI6 rport 0x%x\n",
3331 __func__, laddr6->sin6_addr.s6_addr,
3332 ntohs(laddr6->sin6_port),
3333 raddr6->sin6_addr.s6_addr, ntohs(raddr6->sin6_port));
3334 ep->dst = find_route6(dev, laddr6->sin6_addr.s6_addr,
3335 raddr6->sin6_addr.s6_addr,
3336 laddr6->sin6_port, raddr6->sin6_port, 0,
3337 raddr6->sin6_scope_id);
3338 }
3339 if (!ep->dst) {
cfdda9d7
SW		 3340 printk(KERN_ERR MOD "%s - cannot find route.\n", __func__);
3341 err = -EHOSTUNREACH;
9eccfe10 3342 goto fail2;
cfdda9d7 3343 }
cfdda9d7 3344
963cab50 3345 err = import_ep(ep, iptype, ra, ep->dst, ep->com.dev, true,
ac8e4c69 3346 ep->com.dev->rdev.lldi.adapter_type, cm_id->tos);
3786cf18 3347 if (err) {
cfdda9d7 3348 printk(KERN_ERR MOD "%s - cannot alloc l2e.\n", __func__);
9eccfe10 3349 goto fail3;
cfdda9d7
SW		 3350 }
3351
3352 PDBG("%s txq_idx %u tx_chan %u smac_idx %u rss_qid %u l2t_idx %u\n",
3353 __func__, ep->txq_idx, ep->tx_chan, ep->smac_idx, ep->rss_qid,
3354 ep->l2t->idx);
3355
3356 state_set(&ep->com, CONNECTING);
ac8e4c69 3357 ep->tos = cm_id->tos;
cfdda9d7
SW		 3358
3359 /* send connect request to rnic */
3360 err = send_connect(ep);
3361 if (!err)
3362 goto out;
3363
3364 cxgb4_l2t_release(ep->l2t);
cfdda9d7 3365fail3:
9eccfe10
SW		 3366 dst_release(ep->dst);
3367fail2:
793dad94 3368 remove_handle(ep->com.dev, &ep->com.dev->atid_idr, ep->atid);
cfdda9d7 3369 cxgb4_free_atid(ep->com.dev->rdev.lldi.tids, ep->atid);
9eccfe10 3370fail1:
9ca6f7cf 3371 deref_cm_id(&ep->com);
cfdda9d7
SW		 3372 c4iw_put_ep(&ep->com);
3373out:
3374 return err;
3375}
3376
830662f6
VP		 3377static int create_server6(struct c4iw_dev *dev, struct c4iw_listen_ep *ep)
3378{
3379 int err;
9eccfe10 3380 struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *)
170003c8 3381 &ep->com.local_addr;
830662f6 3382
28de1f74
H		 3383 if (ipv6_addr_type(&sin6->sin6_addr) != IPV6_ADDR_ANY) {
3384 err = cxgb4_clip_get(ep->com.dev->rdev.lldi.ports[0],
3385 (const u32 *)&sin6->sin6_addr.s6_addr, 1);
3386 if (err)
3387 return err;
3388 }
830662f6
VP		 3389 c4iw_init_wr_wait(&ep->com.wr_wait);
3390 err = cxgb4_create_server6(ep->com.dev->rdev.lldi.ports[0],
3391 ep->stid, &sin6->sin6_addr,
3392 sin6->sin6_port,
3393 ep->com.dev->rdev.lldi.rxq_ids[0]);
3394 if (!err)
3395 err = c4iw_wait_for_reply(&ep->com.dev->rdev,
3396 &ep->com.wr_wait,
3397 0, 0, __func__);
e6b11163
H		 3398 else if (err > 0)
3399 err = net_xmit_errno(err);
28de1f74
H		 3400 if (err) {
3401 cxgb4_clip_release(ep->com.dev->rdev.lldi.ports[0],
3402 (const u32 *)&sin6->sin6_addr.s6_addr, 1);
830662f6
VP		 3403 pr_err("cxgb4_create_server6/filter failed err %d stid %d laddr %pI6 lport %d\n",
3404 err, ep->stid,
3405 sin6->sin6_addr.s6_addr, ntohs(sin6->sin6_port));
28de1f74 3406 }
830662f6
VP		 3407 return err;
3408}
3409
3410static int create_server4(struct c4iw_dev *dev, struct c4iw_listen_ep *ep)
3411{
3412 int err;
9eccfe10 3413 struct sockaddr_in *sin = (struct sockaddr_in *)
170003c8 3414 &ep->com.local_addr;
830662f6
VP		 3415
3416 if (dev->rdev.lldi.enable_fw_ofld_conn) {
3417 do {
3418 err = cxgb4_create_server_filter(
3419 ep->com.dev->rdev.lldi.ports[0], ep->stid,
3420 sin->sin_addr.s_addr, sin->sin_port, 0,
3421 ep->com.dev->rdev.lldi.rxq_ids[0], 0, 0);
3422 if (err == -EBUSY) {
99718e59
H		 3423 if (c4iw_fatal_error(&ep->com.dev->rdev)) {
3424 err = -EIO;
3425 break;
3426 }
830662f6
VP		 3427 set_current_state(TASK_UNINTERRUPTIBLE);
3428 schedule_timeout(usecs_to_jiffies(100));
3429 }
3430 } while (err == -EBUSY);
3431 } else {
3432 c4iw_init_wr_wait(&ep->com.wr_wait);
3433 err = cxgb4_create_server(ep->com.dev->rdev.lldi.ports[0],
3434 ep->stid, sin->sin_addr.s_addr, sin->sin_port,
3435 0, ep->com.dev->rdev.lldi.rxq_ids[0]);
3436 if (!err)
3437 err = c4iw_wait_for_reply(&ep->com.dev->rdev,
3438 &ep->com.wr_wait,
3439 0, 0, __func__);
e6b11163
H		 3440 else if (err > 0)
3441 err = net_xmit_errno(err);
830662f6
VP		 3442 }
3443 if (err)
3444 pr_err("cxgb4_create_server/filter failed err %d stid %d laddr %pI4 lport %d\n"
3445 , err, ep->stid,
3446 &sin->sin_addr, ntohs(sin->sin_port));
3447 return err;
3448}
3449
cfdda9d7
SW		 3450int c4iw_create_listen(struct iw_cm_id *cm_id, int backlog)
3451{
3452 int err = 0;
3453 struct c4iw_dev *dev = to_c4iw_dev(cm_id->device);
3454 struct c4iw_listen_ep *ep;
3455
cfdda9d7
SW		 3456 might_sleep();
3457
3458 ep = alloc_ep(sizeof(*ep), GFP_KERNEL);
3459 if (!ep) {
3460 printk(KERN_ERR MOD "%s - cannot alloc ep.\n", __func__);
3461 err = -ENOMEM;
3462 goto fail1;
3463 }
3464 PDBG("%s ep %p\n", __func__, ep);
cfdda9d7 3465 ep->com.cm_id = cm_id;
9ca6f7cf 3466 ref_cm_id(&ep->com);
cfdda9d7
SW		 3467 ep->com.dev = dev;
3468 ep->backlog = backlog;
170003c8 3469 memcpy(&ep->com.local_addr, &cm_id->m_local_addr,
24d44a39 3470 sizeof(ep->com.local_addr));
cfdda9d7
SW		 3471
3472 /*
3473 * Allocate a server TID.
3474 */
8c044690
KS		 3475 if (dev->rdev.lldi.enable_fw_ofld_conn &&
3476 ep->com.local_addr.ss_family == AF_INET)
830662f6 3477 ep->stid = cxgb4_alloc_sftid(dev->rdev.lldi.tids,
170003c8 3478 cm_id->m_local_addr.ss_family, ep);
1cab775c 3479 else
830662f6 3480 ep->stid = cxgb4_alloc_stid(dev->rdev.lldi.tids,
170003c8 3481 cm_id->m_local_addr.ss_family, ep);
1cab775c 3482
cfdda9d7 3483 if (ep->stid == -1) {
be4c9bad 3484 printk(KERN_ERR MOD "%s - cannot alloc stid.\n", __func__);
cfdda9d7
SW		 3485 err = -ENOMEM;
3486 goto fail2;
3487 }
793dad94 3488 insert_handle(dev, &dev->stid_idr, ep, ep->stid);
9eccfe10 3489
170003c8
SW		 3490 memcpy(&ep->com.local_addr, &cm_id->m_local_addr,
3491 sizeof(ep->com.local_addr));
9eccfe10 3492
cfdda9d7 3493 state_set(&ep->com, LISTEN);
830662f6
VP		 3494 if (ep->com.local_addr.ss_family == AF_INET)
3495 err = create_server4(dev, ep);
3496 else
3497 err = create_server6(dev, ep);
cfdda9d7
SW		 3498 if (!err) {
3499 cm_id->provider_data = ep;
3500 goto out;
3501 }
9eccfe10 3502
830662f6
VP		 3503 cxgb4_free_stid(ep->com.dev->rdev.lldi.tids, ep->stid,
3504 ep->com.local_addr.ss_family);
cfdda9d7 3505fail2:
9ca6f7cf 3506 deref_cm_id(&ep->com);
cfdda9d7
SW		 3507 c4iw_put_ep(&ep->com);
3508fail1:
3509out:
3510 return err;
3511}
3512
3513int c4iw_destroy_listen(struct iw_cm_id *cm_id)
3514{
3515 int err;
3516 struct c4iw_listen_ep *ep = to_listen_ep(cm_id);
3517
3518 PDBG("%s ep %p\n", __func__, ep);
3519
3520 might_sleep();
3521 state_set(&ep->com, DEAD);
830662f6
VP		 3522 if (ep->com.dev->rdev.lldi.enable_fw_ofld_conn &&
3523 ep->com.local_addr.ss_family == AF_INET) {
1cab775c
VP		 3524 err = cxgb4_remove_server_filter(
3525 ep->com.dev->rdev.lldi.ports[0], ep->stid,
3526 ep->com.dev->rdev.lldi.rxq_ids[0], 0);
3527 } else {
84cc6ac6 3528 struct sockaddr_in6 *sin6;
1cab775c 3529 c4iw_init_wr_wait(&ep->com.wr_wait);
830662f6
VP		 3530 err = cxgb4_remove_server(
3531 ep->com.dev->rdev.lldi.ports[0], ep->stid,
3532 ep->com.dev->rdev.lldi.rxq_ids[0], 0);
1cab775c
VP		 3533 if (err)
3534 goto done;
3535 err = c4iw_wait_for_reply(&ep->com.dev->rdev, &ep->com.wr_wait,
3536 0, 0, __func__);
170003c8 3537 sin6 = (struct sockaddr_in6 *)&ep->com.local_addr;
84cc6ac6
H		 3538 cxgb4_clip_release(ep->com.dev->rdev.lldi.ports[0],
3539 (const u32 *)&sin6->sin6_addr.s6_addr, 1);
1cab775c 3540 }
793dad94 3541 remove_handle(ep->com.dev, &ep->com.dev->stid_idr, ep->stid);
830662f6
VP		 3542 cxgb4_free_stid(ep->com.dev->rdev.lldi.tids, ep->stid,
3543 ep->com.local_addr.ss_family);
cfdda9d7 3544done:
9ca6f7cf 3545 deref_cm_id(&ep->com);
cfdda9d7
SW		 3546 c4iw_put_ep(&ep->com);
3547 return err;
3548}
3549
3550int c4iw_ep_disconnect(struct c4iw_ep *ep, int abrupt, gfp_t gfp)
3551{
3552 int ret = 0;
cfdda9d7
SW		 3553 int close = 0;
3554 int fatal = 0;
3555 struct c4iw_rdev *rdev;
cfdda9d7 3556
2f5b48c3 3557 mutex_lock(&ep->com.mutex);
cfdda9d7
SW		 3558
3559 PDBG("%s ep %p state %s, abrupt %d\n", __func__, ep,
3560 states[ep->com.state], abrupt);
3561
6e410d8f
H		 3562 /*
3563 * Ref the ep here in case we have fatal errors causing the
3564 * ep to be released and freed.
3565 */
3566 c4iw_get_ep(&ep->com);
3567
cfdda9d7
SW		 3568 rdev = &ep->com.dev->rdev;
3569 if (c4iw_fatal_error(rdev)) {
3570 fatal = 1;
be13b2df 3571 close_complete_upcall(ep, -EIO);
cfdda9d7
SW		 3572 ep->com.state = DEAD;
3573 }
3574 switch (ep->com.state) {
3575 case MPA_REQ_WAIT:
3576 case MPA_REQ_SENT:
3577 case MPA_REQ_RCVD:
3578 case MPA_REP_SENT:
3579 case FPDU_MODE:
3580 close = 1;
3581 if (abrupt)
3582 ep->com.state = ABORTING;
3583 else {
3584 ep->com.state = CLOSING;
ca5a2202 3585 start_ep_timer(ep);
cfdda9d7
SW		 3586 }
3587 set_bit(CLOSE_SENT, &ep->com.flags);
3588 break;
3589 case CLOSING:
3590 if (!test_and_set_bit(CLOSE_SENT, &ep->com.flags)) {
3591 close = 1;
3592 if (abrupt) {
b33bd0cb 3593 (void)stop_ep_timer(ep);
cfdda9d7
SW		 3594 ep->com.state = ABORTING;
3595 } else
3596 ep->com.state = MORIBUND;
3597 }
3598 break;
3599 case MORIBUND:
3600 case ABORTING:
3601 case DEAD:
3602 PDBG("%s ignoring disconnect ep %p state %u\n",
3603 __func__, ep, ep->com.state);
3604 break;
3605 default:
3606 BUG();
3607 break;
3608 }
3609
cfdda9d7 3610 if (close) {
8da7e7a5 3611 if (abrupt) {
793dad94 3612 set_bit(EP_DISC_ABORT, &ep->com.history);
be13b2df 3613 close_complete_upcall(ep, -ECONNRESET);
8da7e7a5 3614 ret = send_abort(ep, NULL, gfp);
793dad94
VP		 3615 } else {
3616 set_bit(EP_DISC_CLOSE, &ep->com.history);
cfdda9d7 3617 ret = send_halfclose(ep, gfp);
793dad94 3618 }
88bc230d 3619 if (ret) {
9ca6f7cf 3620 set_bit(EP_DISC_FAIL, &ep->com.history);
88bc230d
H		 3621 if (!abrupt) {
3622 stop_ep_timer(ep);
3623 close_complete_upcall(ep, -EIO);
3624 }
c00dcbaf
H		 3625 if (ep->com.qp) {
3626 struct c4iw_qp_attributes attrs;
3627
3628 attrs.next_state = C4IW_QP_STATE_ERROR;
3629 ret = c4iw_modify_qp(ep->com.qp->rhp,
3630 ep->com.qp,
3631 C4IW_QP_ATTR_NEXT_STATE,
3632 &attrs, 1);
3633 if (ret)
3634 pr_err(MOD
3635 "%s - qp <- error failed!\n",
3636 __func__);
3637 }
cfdda9d7 3638 fatal = 1;
88bc230d 3639 }
cfdda9d7 3640 }
8da7e7a5 3641 mutex_unlock(&ep->com.mutex);
6e410d8f 3642 c4iw_put_ep(&ep->com);
cfdda9d7
SW		 3643 if (fatal)
3644 release_ep_resources(ep);
3645 return ret;
3646}
3647
1cab775c
VP		 3648static void active_ofld_conn_reply(struct c4iw_dev *dev, struct sk_buff *skb,
3649 struct cpl_fw6_msg_ofld_connection_wr_rpl *req)
3650{
3651 struct c4iw_ep *ep;
793dad94 3652 int atid = be32_to_cpu(req->tid);
1cab775c 3653
ef5d6355
VP		 3654 ep = (struct c4iw_ep *)lookup_atid(dev->rdev.lldi.tids,
3655 (__force u32) req->tid);
1cab775c
VP		 3656 if (!ep)
3657 return;
3658
3659 switch (req->retval) {
3660 case FW_ENOMEM:
793dad94
VP		 3661 set_bit(ACT_RETRY_NOMEM, &ep->com.history);
3662 if (ep->retry_count++ < ACT_OPEN_RETRY_COUNT) {
3663 send_fw_act_open_req(ep, atid);
3664 return;
3665 }
1cab775c 3666 case FW_EADDRINUSE:
793dad94
VP		 3667 set_bit(ACT_RETRY_INUSE, &ep->com.history);
3668 if (ep->retry_count++ < ACT_OPEN_RETRY_COUNT) {
3669 send_fw_act_open_req(ep, atid);
3670 return;
3671 }
1cab775c
VP		 3672 break;
3673 default:
3674 pr_info("%s unexpected ofld conn wr retval %d\n",
3675 __func__, req->retval);
3676 break;
3677 }
793dad94
VP		 3678 pr_err("active ofld_connect_wr failure %d atid %d\n",
3679 req->retval, atid);
3680 mutex_lock(&dev->rdev.stats.lock);
3681 dev->rdev.stats.act_ofld_conn_fails++;
3682 mutex_unlock(&dev->rdev.stats.lock);
1cab775c 3683 connect_reply_upcall(ep, status2errno(req->retval));
793dad94 3684 state_set(&ep->com, DEAD);
84cc6ac6
H		 3685 if (ep->com.remote_addr.ss_family == AF_INET6) {
3686 struct sockaddr_in6 *sin6 =
170003c8 3687 (struct sockaddr_in6 *)&ep->com.local_addr;
84cc6ac6
H		 3688 cxgb4_clip_release(ep->com.dev->rdev.lldi.ports[0],
3689 (const u32 *)&sin6->sin6_addr.s6_addr, 1);
3690 }
793dad94
VP		 3691 remove_handle(dev, &dev->atid_idr, atid);
3692 cxgb4_free_atid(dev->rdev.lldi.tids, atid);
3693 dst_release(ep->dst);
3694 cxgb4_l2t_release(ep->l2t);
3695 c4iw_put_ep(&ep->com);
1cab775c
VP		 3696}
3697
3698static void passive_ofld_conn_reply(struct c4iw_dev *dev, struct sk_buff *skb,
3699 struct cpl_fw6_msg_ofld_connection_wr_rpl *req)
3700{
3701 struct sk_buff *rpl_skb;
3702 struct cpl_pass_accept_req *cpl;
3703 int ret;
3704
710a3110 3705 rpl_skb = (struct sk_buff *)(unsigned long)req->cookie;
1cab775c
VP		 3706 BUG_ON(!rpl_skb);
3707 if (req->retval) {
3708 PDBG("%s passive open failure %d\n", __func__, req->retval);
793dad94
VP		 3709 mutex_lock(&dev->rdev.stats.lock);
3710 dev->rdev.stats.pas_ofld_conn_fails++;
3711 mutex_unlock(&dev->rdev.stats.lock);
1cab775c
VP		 3712 kfree_skb(rpl_skb);
3713 } else {
3714 cpl = (struct cpl_pass_accept_req *)cplhdr(rpl_skb);
3715 OPCODE_TID(cpl) = htonl(MK_OPCODE_TID(CPL_PASS_ACCEPT_REQ,
ef5d6355
VP		 3716 (__force u32) htonl(
3717 (__force u32) req->tid)));
1cab775c
VP		 3718 ret = pass_accept_req(dev, rpl_skb);
3719 if (!ret)
3720 kfree_skb(rpl_skb);
3721 }
3722 return;
3723}
3724
3725static int deferred_fw6_msg(struct c4iw_dev *dev, struct sk_buff *skb)
2f5b48c3
SW		 3726{
3727 struct cpl_fw6_msg *rpl = cplhdr(skb);
1cab775c
VP		 3728 struct cpl_fw6_msg_ofld_connection_wr_rpl *req;
3729
3730 switch (rpl->type) {
3731 case FW6_TYPE_CQE:
3732 c4iw_ev_dispatch(dev, (struct t4_cqe *)&rpl->data[0]);
3733 break;
3734 case FW6_TYPE_OFLD_CONNECTION_WR_RPL:
3735 req = (struct cpl_fw6_msg_ofld_connection_wr_rpl *)rpl->data;
3736 switch (req->t_state) {
3737 case TCP_SYN_SENT:
3738 active_ofld_conn_reply(dev, skb, req);
3739 break;
3740 case TCP_SYN_RECV:
3741 passive_ofld_conn_reply(dev, skb, req);
3742 break;
3743 default:
3744 pr_err("%s unexpected ofld conn wr state %d\n",
3745 __func__, req->t_state);
3746 break;
3747 }
3748 break;
3749 }
3750 return 0;
3751}
3752
3753static void build_cpl_pass_accept_req(struct sk_buff *skb, int stid , u8 tos)
3754{
963cab50
H		 3755 __be32 l2info;
3756 __be16 hdr_len, vlantag, len;
3757 u16 eth_hdr_len;
3758 int tcp_hdr_len, ip_hdr_len;
1cab775c
VP		 3759 u8 intf;
3760 struct cpl_rx_pkt *cpl = cplhdr(skb);
3761 struct cpl_pass_accept_req *req;
3762 struct tcp_options_received tmp_opt;
f079af7a 3763 struct c4iw_dev *dev;
963cab50 3764 enum chip_type type;
1cab775c 3765
f079af7a 3766 dev = *((struct c4iw_dev **) (skb->cb + sizeof(void *)));
1cab775c 3767 /* Store values from cpl_rx_pkt in temporary location. */
963cab50
H		 3768 vlantag = cpl->vlan;
3769 len = cpl->len;
3770 l2info = cpl->l2info;
3771 hdr_len = cpl->hdr_len;
1cab775c
VP		 3772 intf = cpl->iff;
3773
3774 __skb_pull(skb, sizeof(*req) + sizeof(struct rss_header));
3775
3776 /*
3777 * We need to parse the TCP options from SYN packet.
3778 * to generate cpl_pass_accept_req.
3779 */
3780 memset(&tmp_opt, 0, sizeof(tmp_opt));
3781 tcp_clear_options(&tmp_opt);
1a2c6181 3782 tcp_parse_options(skb, &tmp_opt, 0, NULL);
1cab775c
VP		 3783
3784 req = (struct cpl_pass_accept_req *)__skb_push(skb, sizeof(*req));
3785 memset(req, 0, sizeof(*req));
cf7fe64a
HS		 3786 req->l2info = cpu_to_be16(SYN_INTF_V(intf) |
3787 SYN_MAC_IDX_V(RX_MACIDX_G(
963cab50 3788 be32_to_cpu(l2info))) |
cf7fe64a 3789 SYN_XACT_MATCH_F);
963cab50
H		 3790 type = dev->rdev.lldi.adapter_type;
3791 tcp_hdr_len = RX_TCPHDR_LEN_G(be16_to_cpu(hdr_len));
3792 ip_hdr_len = RX_IPHDR_LEN_G(be16_to_cpu(hdr_len));
3793 req->hdr_len =
3794 cpu_to_be32(SYN_RX_CHAN_V(RX_CHAN_G(be32_to_cpu(l2info))));
3795 if (CHELSIO_CHIP_VERSION(type) <= CHELSIO_T5) {
3796 eth_hdr_len = is_t4(type) ?
3797 RX_ETHHDR_LEN_G(be32_to_cpu(l2info)) :
3798 RX_T5_ETHHDR_LEN_G(be32_to_cpu(l2info));
3799 req->hdr_len |= cpu_to_be32(TCP_HDR_LEN_V(tcp_hdr_len) |
3800 IP_HDR_LEN_V(ip_hdr_len) |
3801 ETH_HDR_LEN_V(eth_hdr_len));
3802 } else { /* T6 and later */
3803 eth_hdr_len = RX_T6_ETHHDR_LEN_G(be32_to_cpu(l2info));
3804 req->hdr_len |= cpu_to_be32(T6_TCP_HDR_LEN_V(tcp_hdr_len) |
3805 T6_IP_HDR_LEN_V(ip_hdr_len) |
3806 T6_ETH_HDR_LEN_V(eth_hdr_len));
3807 }
3808 req->vlan = vlantag;
3809 req->len = len;
6c53e938
HS		 3810 req->tos_stid = cpu_to_be32(PASS_OPEN_TID_V(stid) |
3811 PASS_OPEN_TOS_V(tos));
1cab775c
VP		 3812 req->tcpopt.mss = htons(tmp_opt.mss_clamp);
3813 if (tmp_opt.wscale_ok)
3814 req->tcpopt.wsf = tmp_opt.snd_wscale;
3815 req->tcpopt.tstamp = tmp_opt.saw_tstamp;
3816 if (tmp_opt.sack_ok)
3817 req->tcpopt.sack = 1;
3818 OPCODE_TID(req) = htonl(MK_OPCODE_TID(CPL_PASS_ACCEPT_REQ, 0));
3819 return;
3820}
3821
3822static void send_fw_pass_open_req(struct c4iw_dev *dev, struct sk_buff *skb,
3823 __be32 laddr, __be16 lport,
3824 __be32 raddr, __be16 rport,
3825 u32 rcv_isn, u32 filter, u16 window,
3826 u32 rss_qid, u8 port_id)
3827{
3828 struct sk_buff *req_skb;
3829 struct fw_ofld_connection_wr *req;
3830 struct cpl_pass_accept_req *cpl = cplhdr(skb);
1ce1d471 3831 int ret;
1cab775c
VP		 3832
3833 req_skb = alloc_skb(sizeof(struct fw_ofld_connection_wr), GFP_KERNEL);
3834 req = (struct fw_ofld_connection_wr *)__skb_put(req_skb, sizeof(*req));
3835 memset(req, 0, sizeof(*req));
6c53e938 3836 req->op_compl = htonl(WR_OP_V(FW_OFLD_CONNECTION_WR) | FW_WR_COMPL_F);
e2ac9628 3837 req->len16_pkd = htonl(FW_WR_LEN16_V(DIV_ROUND_UP(sizeof(*req), 16)));
77a80e23 3838 req->le.version_cpl = htonl(FW_OFLD_CONNECTION_WR_CPL_F);
ef5d6355 3839 req->le.filter = (__force __be32) filter;
1cab775c
VP		 3840 req->le.lport = lport;
3841 req->le.pport = rport;
3842 req->le.u.ipv4.lip = laddr;
3843 req->le.u.ipv4.pip = raddr;
3844 req->tcb.rcv_nxt = htonl(rcv_isn + 1);
3845 req->tcb.rcv_adv = htons(window);
3846 req->tcb.t_state_to_astid =
77a80e23
HS		 3847 htonl(FW_OFLD_CONNECTION_WR_T_STATE_V(TCP_SYN_RECV) |
3848 FW_OFLD_CONNECTION_WR_RCV_SCALE_V(cpl->tcpopt.wsf) |
3849 FW_OFLD_CONNECTION_WR_ASTID_V(
6c53e938 3850 PASS_OPEN_TID_G(ntohl(cpl->tos_stid))));
1cab775c
VP		 3851
3852 /*
3853 * We store the qid in opt2 which will be used by the firmware
3854 * to send us the wr response.
3855 */
d7990b0c 3856 req->tcb.opt2 = htonl(RSS_QUEUE_V(rss_qid));
1cab775c
VP		 3857
3858 /*
3859 * We initialize the MSS index in TCB to 0xF.
3860 * So that when driver sends cpl_pass_accept_rpl
3861 * TCB picks up the correct value. If this was 0
3862 * TP will ignore any value > 0 for MSS index.
3863 */
d7990b0c 3864 req->tcb.opt0 = cpu_to_be64(MSS_IDX_V(0xF));
6198dd8d 3865 req->cookie = (uintptr_t)skb;
1cab775c
VP		 3866
3867 set_wr_txq(req_skb, CPL_PRIORITY_CONTROL, port_id);
1ce1d471
SW		 3868 ret = cxgb4_ofld_send(dev->rdev.lldi.ports[0], req_skb);
3869 if (ret < 0) {
3870 pr_err("%s - cxgb4_ofld_send error %d - dropping\n", __func__,
3871 ret);
3872 kfree_skb(skb);
3873 kfree_skb(req_skb);
3874 }
1cab775c
VP		 3875}
3876
3877/*
3878 * Handler for CPL_RX_PKT message. Need to handle cpl_rx_pkt
3879 * messages when a filter is being used instead of server to
3880 * redirect a syn packet. When packets hit filter they are redirected
3881 * to the offload queue and driver tries to establish the connection
3882 * using firmware work request.
3883 */
3884static int rx_pkt(struct c4iw_dev *dev, struct sk_buff *skb)
3885{
3886 int stid;
3887 unsigned int filter;
3888 struct ethhdr *eh = NULL;
3889 struct vlan_ethhdr *vlan_eh = NULL;
3890 struct iphdr *iph;
3891 struct tcphdr *tcph;
3892 struct rss_header *rss = (void *)skb->data;
3893 struct cpl_rx_pkt *cpl = (void *)skb->data;
3894 struct cpl_pass_accept_req *req = (void *)(rss + 1);
3895 struct l2t_entry *e;
3896 struct dst_entry *dst;
f86fac79 3897 struct c4iw_ep *lep = NULL;
1cab775c
VP		 3898 u16 window;
3899 struct port_info *pi;
3900 struct net_device *pdev;
f079af7a 3901 u16 rss_qid, eth_hdr_len;
1cab775c
VP		 3902 int step;
3903 u32 tx_chan;
3904 struct neighbour *neigh;
3905
3906 /* Drop all non-SYN packets */
bdc590b9 3907 if (!(cpl->l2info & cpu_to_be32(RXF_SYN_F)))
1cab775c
VP		 3908 goto reject;
3909
3910 /*
3911 * Drop all packets which did not hit the filter.
3912 * Unlikely to happen.
3913 */
3914 if (!(rss->filter_hit && rss->filter_tid))
3915 goto reject;
3916
3917 /*
3918 * Calculate the server tid from filter hit index from cpl_rx_pkt.
3919 */
a4ea025f 3920 stid = (__force int) cpu_to_be32((__force u32) rss->hash_val);
1cab775c 3921
f86fac79 3922 lep = (struct c4iw_ep *)get_ep_from_stid(dev, stid);
1cab775c
VP		 3923 if (!lep) {
3924 PDBG("%s connect request on invalid stid %d\n", __func__, stid);
3925 goto reject;
3926 }
3927
963cab50
H		 3928 switch (CHELSIO_CHIP_VERSION(dev->rdev.lldi.adapter_type)) {
3929 case CHELSIO_T4:
3930 eth_hdr_len = RX_ETHHDR_LEN_G(be32_to_cpu(cpl->l2info));
3931 break;
3932 case CHELSIO_T5:
3933 eth_hdr_len = RX_T5_ETHHDR_LEN_G(be32_to_cpu(cpl->l2info));
3934 break;
3935 case CHELSIO_T6:
3936 eth_hdr_len = RX_T6_ETHHDR_LEN_G(be32_to_cpu(cpl->l2info));
3937 break;
3938 default:
3939 pr_err("T%d Chip is not supported\n",
3940 CHELSIO_CHIP_VERSION(dev->rdev.lldi.adapter_type));
3941 goto reject;
3942 }
3943
f079af7a 3944 if (eth_hdr_len == ETH_HLEN) {
1cab775c
VP		 3945 eh = (struct ethhdr *)(req + 1);
3946 iph = (struct iphdr *)(eh + 1);
3947 } else {
3948 vlan_eh = (struct vlan_ethhdr *)(req + 1);
3949 iph = (struct iphdr *)(vlan_eh + 1);
3950 skb->vlan_tci = ntohs(cpl->vlan);
3951 }
3952
3953 if (iph->version != 0x4)
3954 goto reject;
3955
3956 tcph = (struct tcphdr *)(iph + 1);
3957 skb_set_network_header(skb, (void *)iph - (void *)rss);
3958 skb_set_transport_header(skb, (void *)tcph - (void *)rss);
3959 skb_get(skb);
3960
3961 PDBG("%s lip 0x%x lport %u pip 0x%x pport %u tos %d\n", __func__,
3962 ntohl(iph->daddr), ntohs(tcph->dest), ntohl(iph->saddr),
3963 ntohs(tcph->source), iph->tos);
3964
830662f6
VP		 3965 dst = find_route(dev, iph->daddr, iph->saddr, tcph->dest, tcph->source,
3966 iph->tos);
3967 if (!dst) {
1cab775c
VP		 3968 pr_err("%s - failed to find dst entry!\n",
3969 __func__);
3970 goto reject;
3971 }
1cab775c
VP		 3972 neigh = dst_neigh_lookup_skb(dst, skb);
3973
aaa0c23c
ZZ		 3974 if (!neigh) {
3975 pr_err("%s - failed to allocate neigh!\n",
3976 __func__);
3977 goto free_dst;
3978 }
3979
1cab775c
VP		 3980 if (neigh->dev->flags & IFF_LOOPBACK) {
3981 pdev = ip_dev_find(&init_net, iph->daddr);
3982 e = cxgb4_l2t_get(dev->rdev.lldi.l2t, neigh,
3983 pdev, 0);
3984 pi = (struct port_info *)netdev_priv(pdev);
3985 tx_chan = cxgb4_port_chan(pdev);
3986 dev_put(pdev);
3987 } else {
830662f6 3988 pdev = get_real_dev(neigh->dev);
1cab775c 3989 e = cxgb4_l2t_get(dev->rdev.lldi.l2t, neigh,
830662f6
VP		 3990 pdev, 0);
3991 pi = (struct port_info *)netdev_priv(pdev);
3992 tx_chan = cxgb4_port_chan(pdev);
1cab775c 3993 }
ebf00060 3994 neigh_release(neigh);
1cab775c
VP		 3995 if (!e) {
3996 pr_err("%s - failed to allocate l2t entry!\n",
3997 __func__);
3998 goto free_dst;
3999 }
4000
4001 step = dev->rdev.lldi.nrxq / dev->rdev.lldi.nchan;
4002 rss_qid = dev->rdev.lldi.rxq_ids[pi->port_id * step];
ef5d6355 4003 window = (__force u16) htons((__force u16)tcph->window);
1cab775c
VP		 4004
4005 /* Calcuate filter portion for LE region. */
41b4f86c
KS		 4006 filter = (__force unsigned int) cpu_to_be32(cxgb4_select_ntuple(
4007 dev->rdev.lldi.ports[0],
4008 e));
1cab775c
VP		 4009
4010 /*
4011 * Synthesize the cpl_pass_accept_req. We have everything except the
4012 * TID. Once firmware sends a reply with TID we update the TID field
4013 * in cpl and pass it through the regular cpl_pass_accept_req path.
4014 */
4015 build_cpl_pass_accept_req(skb, stid, iph->tos);
4016 send_fw_pass_open_req(dev, skb, iph->daddr, tcph->dest, iph->saddr,
4017 tcph->source, ntohl(tcph->seq), filter, window,
4018 rss_qid, pi->port_id);
4019 cxgb4_l2t_release(e);
4020free_dst:
4021 dst_release(dst);
4022reject:
f86fac79
H		 4023 if (lep)
4024 c4iw_put_ep(&lep->com);
2f5b48c3
SW		 4025 return 0;
4026}
4027
be4c9bad
RD		 4028/*
4029 * These are the real handlers that are called from a
4030 * work queue.
4031 */
9dec900c 4032static c4iw_handler_func work_handlers[NUM_CPL_CMDS + NUM_FAKE_CPLS] = {
be4c9bad
RD		 4033 [CPL_ACT_ESTABLISH] = act_establish,
4034 [CPL_ACT_OPEN_RPL] = act_open_rpl,
4035 [CPL_RX_DATA] = rx_data,
4036 [CPL_ABORT_RPL_RSS] = abort_rpl,
4037 [CPL_ABORT_RPL] = abort_rpl,
4038 [CPL_PASS_OPEN_RPL] = pass_open_rpl,
4039 [CPL_CLOSE_LISTSRV_RPL] = close_listsrv_rpl,
4040 [CPL_PASS_ACCEPT_REQ] = pass_accept_req,
4041 [CPL_PASS_ESTABLISH] = pass_establish,
4042 [CPL_PEER_CLOSE] = peer_close,
4043 [CPL_ABORT_REQ_RSS] = peer_abort,
4044 [CPL_CLOSE_CON_RPL] = close_con_rpl,
4045 [CPL_RDMA_TERMINATE] = terminate,
2f5b48c3 4046 [CPL_FW4_ACK] = fw4_ack,
1cab775c 4047 [CPL_FW6_MSG] = deferred_fw6_msg,
9dec900c 4048 [CPL_RX_PKT] = rx_pkt,
8d1f1a6b
H		 4049 [FAKE_CPL_PUT_EP_SAFE] = _put_ep_safe,
4050 [FAKE_CPL_PASS_PUT_EP_SAFE] = _put_pass_ep_safe
be4c9bad
RD		 4051};
4052
4053static void process_timeout(struct c4iw_ep *ep)
4054{
4055 struct c4iw_qp_attributes attrs;
4056 int abort = 1;
4057
2f5b48c3 4058 mutex_lock(&ep->com.mutex);
be4c9bad
RD		 4059 PDBG("%s ep %p tid %u state %d\n", __func__, ep, ep->hwtid,
4060 ep->com.state);
793dad94 4061 set_bit(TIMEDOUT, &ep->com.history);
be4c9bad
RD		 4062 switch (ep->com.state) {
4063 case MPA_REQ_SENT:
be4c9bad
RD		 4064 connect_reply_upcall(ep, -ETIMEDOUT);
4065 break;
4066 case MPA_REQ_WAIT:
ceb110a8 4067 case MPA_REQ_RCVD:
e4b76a2a 4068 case MPA_REP_SENT:
ceb110a8 4069 case FPDU_MODE:
be4c9bad
RD		 4070 break;
4071 case CLOSING:
4072 case MORIBUND:
4073 if (ep->com.cm_id && ep->com.qp) {
4074 attrs.next_state = C4IW_QP_STATE_ERROR;
4075 c4iw_modify_qp(ep->com.qp->rhp,
4076 ep->com.qp, C4IW_QP_ATTR_NEXT_STATE,
4077 &attrs, 1);
4078 }
be13b2df 4079 close_complete_upcall(ep, -ETIMEDOUT);
be4c9bad 4080 break;
b33bd0cb
SW		 4081 case ABORTING:
4082 case DEAD:
4083
4084 /*
4085 * These states are expected if the ep timed out at the same
4086 * time as another thread was calling stop_ep_timer().
4087 * So we silently do nothing for these states.
4088 */
4089 abort = 0;
4090 break;
be4c9bad 4091 default:
76f267b7 4092 WARN(1, "%s unexpected state ep %p tid %u state %u\n",
be4c9bad 4093 __func__, ep, ep->hwtid, ep->com.state);
be4c9bad
RD		 4094 abort = 0;
4095 }
cc18b939 4096 mutex_unlock(&ep->com.mutex);
69736279
H		 4097 if (abort)
4098 c4iw_ep_disconnect(ep, 1, GFP_KERNEL);
be4c9bad
RD		 4099 c4iw_put_ep(&ep->com);
4100}
4101
4102static void process_timedout_eps(void)
4103{
4104 struct c4iw_ep *ep;
4105
4106 spin_lock_irq(&timeout_lock);
4107 while (!list_empty(&timeout_list)) {
4108 struct list_head *tmp;
4109
4110 tmp = timeout_list.next;
4111 list_del(tmp);
b33bd0cb
SW		 4112 tmp->next = NULL;
4113 tmp->prev = NULL;
be4c9bad
RD		 4114 spin_unlock_irq(&timeout_lock);
4115 ep = list_entry(tmp, struct c4iw_ep, entry);
4116 process_timeout(ep);
4117 spin_lock_irq(&timeout_lock);
4118 }
4119 spin_unlock_irq(&timeout_lock);
4120}
4121
4122static void process_work(struct work_struct *work)
4123{
4124 struct sk_buff *skb = NULL;
4125 struct c4iw_dev *dev;
c1d7356c 4126 struct cpl_act_establish *rpl;
be4c9bad
RD		 4127 unsigned int opcode;
4128 int ret;
4129
b33bd0cb 4130 process_timedout_eps();
be4c9bad
RD		 4131 while ((skb = skb_dequeue(&rxq))) {
4132 rpl = cplhdr(skb);
4133 dev = *((struct c4iw_dev **) (skb->cb + sizeof(void *)));
4134 opcode = rpl->ot.opcode;
4135
4136 BUG_ON(!work_handlers[opcode]);
4137 ret = work_handlers[opcode](dev, skb);
4138 if (!ret)
4139 kfree_skb(skb);
b33bd0cb 4140 process_timedout_eps();
be4c9bad 4141 }
be4c9bad
RD		 4142}
4143
4144static DECLARE_WORK(skb_work, process_work);
4145
4146static void ep_timeout(unsigned long arg)
4147{
4148 struct c4iw_ep *ep = (struct c4iw_ep *)arg;
1ec779cc 4149 int kickit = 0;
be4c9bad
RD		 4150
4151 spin_lock(&timeout_lock);
1ec779cc 4152 if (!test_and_set_bit(TIMEOUT, &ep->com.flags)) {
b33bd0cb
SW		 4153 /*
4154 * Only insert if it is not already on the list.
4155 */
4156 if (!ep->entry.next) {
4157 list_add_tail(&ep->entry, &timeout_list);
4158 kickit = 1;
4159 }
1ec779cc 4160 }
be4c9bad 4161 spin_unlock(&timeout_lock);
1ec779cc
VP		 4162 if (kickit)
4163 queue_work(workq, &skb_work);
be4c9bad
RD		 4164}
4165
cfdda9d7
SW		 4166/*
4167 * All the CM events are handled on a work queue to have a safe context.
4168 */
4169static int sched(struct c4iw_dev *dev, struct sk_buff *skb)
4170{
4171
4172 /*
4173 * Save dev in the skb->cb area.
4174 */
4175 *((struct c4iw_dev **) (skb->cb + sizeof(void *))) = dev;
4176
4177 /*
4178 * Queue the skb and schedule the worker thread.
4179 */
4180 skb_queue_tail(&rxq, skb);
4181 queue_work(workq, &skb_work);
4182 return 0;
4183}
4184
4185static int set_tcb_rpl(struct c4iw_dev *dev, struct sk_buff *skb)
4186{
4187 struct cpl_set_tcb_rpl *rpl = cplhdr(skb);
4188
4189 if (rpl->status != CPL_ERR_NONE) {
4190 printk(KERN_ERR MOD "Unexpected SET_TCB_RPL status %u "
4191 "for tid %u\n", rpl->status, GET_TID(rpl));
4192 }
2f5b48c3 4193 kfree_skb(skb);
cfdda9d7
SW		 4194 return 0;
4195}
4196
be4c9bad
RD		 4197static int fw6_msg(struct c4iw_dev *dev, struct sk_buff *skb)
4198{
4199 struct cpl_fw6_msg *rpl = cplhdr(skb);
4200 struct c4iw_wr_wait *wr_waitp;
4201 int ret;
4202
4203 PDBG("%s type %u\n", __func__, rpl->type);
4204
4205 switch (rpl->type) {
5be78ee9 4206 case FW6_TYPE_WR_RPL:
be4c9bad 4207 ret = (int)((be64_to_cpu(rpl->data[0]) >> 8) & 0xff);
c8e081a1 4208 wr_waitp = (struct c4iw_wr_wait *)(__force unsigned long) rpl->data[1];
be4c9bad 4209 PDBG("%s wr_waitp %p ret %u\n", __func__, wr_waitp, ret);
d9594d99
SW		 4210 if (wr_waitp)
4211 c4iw_wake_up(wr_waitp, ret ? -ret : 0);
2f5b48c3 4212 kfree_skb(skb);
be4c9bad 4213 break;
5be78ee9 4214 case FW6_TYPE_CQE:
5be78ee9 4215 case FW6_TYPE_OFLD_CONNECTION_WR_RPL:
1cab775c 4216 sched(dev, skb);
5be78ee9 4217 break;
be4c9bad
RD		 4218 default:
4219 printk(KERN_ERR MOD "%s unexpected fw6 msg type %u\n", __func__,
4220 rpl->type);
2f5b48c3 4221 kfree_skb(skb);
be4c9bad
RD		 4222 break;
4223 }
4224 return 0;
4225}
4226
8da7e7a5
SW		 4227static int peer_abort_intr(struct c4iw_dev *dev, struct sk_buff *skb)
4228{
4229 struct cpl_abort_req_rss *req = cplhdr(skb);
4230 struct c4iw_ep *ep;
8da7e7a5
SW		 4231 unsigned int tid = GET_TID(req);
4232
944661dd
H		 4233 ep = get_ep_from_tid(dev, tid);
4234 /* This EP will be dereferenced in peer_abort() */
14b92228
SW		 4235 if (!ep) {
4236 printk(KERN_WARNING MOD
4237 "Abort on non-existent endpoint, tid %d\n", tid);
4238 kfree_skb(skb);
4239 return 0;
4240 }
7a2cea2a 4241 if (is_neg_adv(req->status)) {
179d03bb
H		 4242 PDBG("%s Negative advice on abort- tid %u status %d (%s)\n",
4243 __func__, ep->hwtid, req->status,
4244 neg_adv_str(req->status));
944661dd 4245 goto out;
8da7e7a5
SW		 4246 }
4247 PDBG("%s ep %p tid %u state %u\n", __func__, ep, ep->hwtid,
4248 ep->com.state);
4249
093108cb 4250 c4iw_wake_up(&ep->com.wr_wait, -ECONNRESET);
944661dd 4251out:
8da7e7a5
SW		 4252 sched(dev, skb);
4253 return 0;
4254}
4255
be4c9bad
RD		 4256/*
4257 * Most upcalls from the T4 Core go to sched() to
4258 * schedule the processing on a work queue.
4259 */
4260c4iw_handler_func c4iw_handlers[NUM_CPL_CMDS] = {
4261 [CPL_ACT_ESTABLISH] = sched,
4262 [CPL_ACT_OPEN_RPL] = sched,
4263 [CPL_RX_DATA] = sched,
4264 [CPL_ABORT_RPL_RSS] = sched,
4265 [CPL_ABORT_RPL] = sched,
4266 [CPL_PASS_OPEN_RPL] = sched,
4267 [CPL_CLOSE_LISTSRV_RPL] = sched,
4268 [CPL_PASS_ACCEPT_REQ] = sched,
4269 [CPL_PASS_ESTABLISH] = sched,
4270 [CPL_PEER_CLOSE] = sched,
4271 [CPL_CLOSE_CON_RPL] = sched,
8da7e7a5 4272 [CPL_ABORT_REQ_RSS] = peer_abort_intr,
be4c9bad
RD		 4273 [CPL_RDMA_TERMINATE] = sched,
4274 [CPL_FW4_ACK] = sched,
4275 [CPL_SET_TCB_RPL] = set_tcb_rpl,
1cab775c
VP		 4276 [CPL_FW6_MSG] = fw6_msg,
4277 [CPL_RX_PKT] = sched
be4c9bad
RD		 4278};
4279
cfdda9d7
SW		 4280int __init c4iw_cm_init(void)
4281{
be4c9bad 4282 spin_lock_init(&timeout_lock);
cfdda9d7
SW		 4283 skb_queue_head_init(&rxq);
4284
4285 workq = create_singlethread_workqueue("iw_cxgb4");
4286 if (!workq)
4287 return -ENOMEM;
4288
cfdda9d7
SW		 4289 return 0;
4290}
4291
46c1376d 4292void c4iw_cm_term(void)
cfdda9d7 4293{
be4c9bad 4294 WARN_ON(!list_empty(&timeout_list));
cfdda9d7
SW		 4295 flush_workqueue(workq);
4296 destroy_workqueue(workq);
4297}
Linux 6.x block layer and io_uring tree(s)