1 /*
2 * Copyright (c) 2009-2014 Chelsio, Inc. All rights reserved.
3 *
4 * This software is available to you under a choice of one of two
5 * licenses. You may choose to be licensed under the terms of the GNU
6 * General Public License (GPL) Version 2, available from the file
7 * COPYING in the main directory of this source tree, or the
8 * OpenIB.org BSD license below:
9 *
10 * Redistribution and use in source and binary forms, with or
11 * without modification, are permitted provided that the following
12 * conditions are met:
13 *
14 * - Redistributions of source code must retain the above
15 * copyright notice, this list of conditions and the following
16 * disclaimer.
17 *
18 * - Redistributions in binary form must reproduce the above
19 * copyright notice, this list of conditions and the following
20 * disclaimer in the documentation and/or other materials
21 * provided with the distribution.
22 *
23 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
24 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
25 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
26 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
27 * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
28 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
29 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
30 * SOFTWARE.
31 */
32 #include <linux/module.h>
33 #include <linux/list.h>
34 #include <linux/workqueue.h>
35 #include <linux/skbuff.h>
36 #include <linux/timer.h>
37 #include <linux/notifier.h>
38 #include <linux/inetdevice.h>
39 #include <linux/ip.h>
40 #include <linux/tcp.h>
41 #include <linux/if_vlan.h>
42
43 #include <net/neighbour.h>
44 #include <net/netevent.h>
45 #include <net/route.h>
46 #include <net/tcp.h>
47 #include <net/ip6_route.h>
48 #include <net/addrconf.h>
49
50 #include <rdma/ib_addr.h>
51
52 #include <libcxgb_cm.h>
53 #include "iw_cxgb4.h"
54 #include "clip_tbl.h"
55
56 static char *states[] = {
57 "idle",
58 "listen",
59 "connecting",
60 "mpa_wait_req",
61 "mpa_req_sent",
62 "mpa_req_rcvd",
63 "mpa_rep_sent",
64 "fpdu_mode",
65 "aborting",
66 "closing",
67 "moribund",
68 "dead",
69 NULL,
70 };
71
72 static int nocong;
73 module_param(nocong, int, 0644);
74 MODULE_PARM_DESC(nocong, "Turn of congestion control (default=0)");
75
76 static int enable_ecn;
77 module_param(enable_ecn, int, 0644);
78 MODULE_PARM_DESC(enable_ecn, "Enable ECN (default=0/disabled)");
79
80 static int dack_mode;
81 module_param(dack_mode, int, 0644);
82 MODULE_PARM_DESC(dack_mode, "Delayed ack mode (default=0)");
83
84 uint c4iw_max_read_depth = 32;
85 module_param(c4iw_max_read_depth, int, 0644);
86 MODULE_PARM_DESC(c4iw_max_read_depth,
87 "Per-connection max ORD/IRD (default=32)");
88
89 static int enable_tcp_timestamps;
90 module_param(enable_tcp_timestamps, int, 0644);
91 MODULE_PARM_DESC(enable_tcp_timestamps, "Enable tcp timestamps (default=0)");
92
93 static int enable_tcp_sack;
94 module_param(enable_tcp_sack, int, 0644);
95 MODULE_PARM_DESC(enable_tcp_sack, "Enable tcp SACK (default=0)");
96
97 static int enable_tcp_window_scaling = 1;
98 module_param(enable_tcp_window_scaling, int, 0644);
99 MODULE_PARM_DESC(enable_tcp_window_scaling,
100 "Enable tcp window scaling (default=1)");
101
102 static int peer2peer = 1;
103 module_param(peer2peer, int, 0644);
104 MODULE_PARM_DESC(peer2peer, "Support peer2peer ULPs (default=1)");
105
106 static int p2p_type = FW_RI_INIT_P2PTYPE_READ_REQ;
107 module_param(p2p_type, int, 0644);
108 MODULE_PARM_DESC(p2p_type, "RDMAP opcode to use for the RTR message: "
109 "1=RDMA_READ 0=RDMA_WRITE (default 1)");
110
111 static int ep_timeout_secs = 60;
112 module_param(ep_timeout_secs, int, 0644);
113 MODULE_PARM_DESC(ep_timeout_secs, "CM Endpoint operation timeout "
114 "in seconds (default=60)");
115
116 static int mpa_rev = 2;
117 module_param(mpa_rev, int, 0644);
118 MODULE_PARM_DESC(mpa_rev, "MPA Revision, 0 supports amso1100, "
119 "1 is RFC5044 spec compliant, 2 is IETF MPA Peer Connect Draft"
120 " compliant (default=2)");
121
122 static int markers_enabled;
123 module_param(markers_enabled, int, 0644);
124 MODULE_PARM_DESC(markers_enabled, "Enable MPA MARKERS (default(0)=disabled)");
125
126 static int crc_enabled = 1;
127 module_param(crc_enabled, int, 0644);
128 MODULE_PARM_DESC(crc_enabled, "Enable MPA CRC (default(1)=enabled)");
129
130 static int rcv_win = 256 * 1024;
131 module_param(rcv_win, int, 0644);
132 MODULE_PARM_DESC(rcv_win, "TCP receive window in bytes (default=256KB)");
133
134 static int snd_win = 128 * 1024;
135 module_param(snd_win, int, 0644);
136 MODULE_PARM_DESC(snd_win, "TCP send window in bytes (default=128KB)");
137
138 static struct workqueue_struct *workq;
139
140 static struct sk_buff_head rxq;
141
142 static struct sk_buff *get_skb(struct sk_buff *skb, int len, gfp_t gfp);
143 static void ep_timeout(struct timer_list *t);
144 static void connect_reply_upcall(struct c4iw_ep *ep, int status);
145 static int sched(struct c4iw_dev *dev, struct sk_buff *skb);
146
147 static LIST_HEAD(timeout_list);
148 static DEFINE_SPINLOCK(timeout_lock);
149
deref_cm_id(struct c4iw_ep_common * epc)150 static void deref_cm_id(struct c4iw_ep_common *epc)
151 {
152 epc->cm_id->rem_ref(epc->cm_id);
153 epc->cm_id = NULL;
154 set_bit(CM_ID_DEREFED, &epc->history);
155 }
156
ref_cm_id(struct c4iw_ep_common * epc)157 static void ref_cm_id(struct c4iw_ep_common *epc)
158 {
159 set_bit(CM_ID_REFED, &epc->history);
160 epc->cm_id->add_ref(epc->cm_id);
161 }
162
deref_qp(struct c4iw_ep * ep)163 static void deref_qp(struct c4iw_ep *ep)
164 {
165 c4iw_qp_rem_ref(&ep->com.qp->ibqp);
166 clear_bit(QP_REFERENCED, &ep->com.flags);
167 set_bit(QP_DEREFED, &ep->com.history);
168 }
169
ref_qp(struct c4iw_ep * ep)170 static void ref_qp(struct c4iw_ep *ep)
171 {
172 set_bit(QP_REFERENCED, &ep->com.flags);
173 set_bit(QP_REFED, &ep->com.history);
174 c4iw_qp_add_ref(&ep->com.qp->ibqp);
175 }
176
start_ep_timer(struct c4iw_ep * ep)177 static void start_ep_timer(struct c4iw_ep *ep)
178 {
179 pr_debug("ep %p\n", ep);
180 if (timer_pending(&ep->timer)) {
181 pr_err("%s timer already started! ep %p\n",
182 __func__, ep);
183 return;
184 }
185 clear_bit(TIMEOUT, &ep->com.flags);
186 c4iw_get_ep(&ep->com);
187 ep->timer.expires = jiffies + ep_timeout_secs * HZ;
188 add_timer(&ep->timer);
189 }
190
stop_ep_timer(struct c4iw_ep * ep)191 static int stop_ep_timer(struct c4iw_ep *ep)
192 {
193 pr_debug("ep %p stopping\n", ep);
194 del_timer_sync(&ep->timer);
195 if (!test_and_set_bit(TIMEOUT, &ep->com.flags)) {
196 c4iw_put_ep(&ep->com);
197 return 0;
198 }
199 return 1;
200 }
201
c4iw_l2t_send(struct c4iw_rdev * rdev,struct sk_buff * skb,struct l2t_entry * l2e)202 static int c4iw_l2t_send(struct c4iw_rdev *rdev, struct sk_buff *skb,
203 struct l2t_entry *l2e)
204 {
205 int error = 0;
206
207 if (c4iw_fatal_error(rdev)) {
208 kfree_skb(skb);
209 pr_err("%s - device in error state - dropping\n", __func__);
210 return -EIO;
211 }
212 error = cxgb4_l2t_send(rdev->lldi.ports[0], skb, l2e);
213 if (error < 0)
214 kfree_skb(skb);
215 else if (error == NET_XMIT_DROP)
216 return -ENOMEM;
217 return error < 0 ? error : 0;
218 }
219
c4iw_ofld_send(struct c4iw_rdev * rdev,struct sk_buff * skb)220 int c4iw_ofld_send(struct c4iw_rdev *rdev, struct sk_buff *skb)
221 {
222 int error = 0;
223
224 if (c4iw_fatal_error(rdev)) {
225 kfree_skb(skb);
226 pr_err("%s - device in error state - dropping\n", __func__);
227 return -EIO;
228 }
229 error = cxgb4_ofld_send(rdev->lldi.ports[0], skb);
230 if (error < 0)
231 kfree_skb(skb);
232 return error < 0 ? error : 0;
233 }
234
release_tid(struct c4iw_rdev * rdev,u32 hwtid,struct sk_buff * skb)235 static void release_tid(struct c4iw_rdev *rdev, u32 hwtid, struct sk_buff *skb)
236 {
237 u32 len = roundup(sizeof(struct cpl_tid_release), 16);
238
239 skb = get_skb(skb, len, GFP_KERNEL);
240 if (!skb)
241 return;
242
243 cxgb_mk_tid_release(skb, len, hwtid, 0);
244 c4iw_ofld_send(rdev, skb);
245 return;
246 }
247
set_emss(struct c4iw_ep * ep,u16 opt)248 static void set_emss(struct c4iw_ep *ep, u16 opt)
249 {
250 ep->emss = ep->com.dev->rdev.lldi.mtus[TCPOPT_MSS_G(opt)] -
251 ((AF_INET == ep->com.remote_addr.ss_family) ?
252 sizeof(struct iphdr) : sizeof(struct ipv6hdr)) -
253 sizeof(struct tcphdr);
254 ep->mss = ep->emss;
255 if (TCPOPT_TSTAMP_G(opt))
256 ep->emss -= round_up(TCPOLEN_TIMESTAMP, 4);
257 if (ep->emss < 128)
258 ep->emss = 128;
259 if (ep->emss & 7)
260 pr_debug("Warning: misaligned mtu idx %u mss %u emss=%u\n",
261 TCPOPT_MSS_G(opt), ep->mss, ep->emss);
262 pr_debug("mss_idx %u mss %u emss=%u\n", TCPOPT_MSS_G(opt), ep->mss,
263 ep->emss);
264 }
265
state_read(struct c4iw_ep_common * epc)266 static enum c4iw_ep_state state_read(struct c4iw_ep_common *epc)
267 {
268 enum c4iw_ep_state state;
269
270 mutex_lock(&epc->mutex);
271 state = epc->state;
272 mutex_unlock(&epc->mutex);
273 return state;
274 }
275
__state_set(struct c4iw_ep_common * epc,enum c4iw_ep_state new)276 static void __state_set(struct c4iw_ep_common *epc, enum c4iw_ep_state new)
277 {
278 epc->state = new;
279 }
280
state_set(struct c4iw_ep_common * epc,enum c4iw_ep_state new)281 static void state_set(struct c4iw_ep_common *epc, enum c4iw_ep_state new)
282 {
283 mutex_lock(&epc->mutex);
284 pr_debug("%s -> %s\n", states[epc->state], states[new]);
285 __state_set(epc, new);
286 mutex_unlock(&epc->mutex);
287 return;
288 }
289
alloc_ep_skb_list(struct sk_buff_head * ep_skb_list,int size)290 static int alloc_ep_skb_list(struct sk_buff_head *ep_skb_list, int size)
291 {
292 struct sk_buff *skb;
293 unsigned int i;
294 size_t len;
295
296 len = roundup(sizeof(union cpl_wr_size), 16);
297 for (i = 0; i < size; i++) {
298 skb = alloc_skb(len, GFP_KERNEL);
299 if (!skb)
300 goto fail;
301 skb_queue_tail(ep_skb_list, skb);
302 }
303 return 0;
304 fail:
305 skb_queue_purge(ep_skb_list);
306 return -ENOMEM;
307 }
308
alloc_ep(int size,gfp_t gfp)309 static void *alloc_ep(int size, gfp_t gfp)
310 {
311 struct c4iw_ep_common *epc;
312
313 epc = kzalloc(size, gfp);
314 if (epc) {
315 epc->wr_waitp = c4iw_alloc_wr_wait(gfp);
316 if (!epc->wr_waitp) {
317 kfree(epc);
318 epc = NULL;
319 goto out;
320 }
321 kref_init(&epc->kref);
322 mutex_init(&epc->mutex);
323 c4iw_init_wr_wait(epc->wr_waitp);
324 }
325 pr_debug("alloc ep %p\n", epc);
326 out:
327 return epc;
328 }
329
remove_ep_tid(struct c4iw_ep * ep)330 static void remove_ep_tid(struct c4iw_ep *ep)
331 {
332 unsigned long flags;
333
334 xa_lock_irqsave(&ep->com.dev->hwtids, flags);
335 __xa_erase(&ep->com.dev->hwtids, ep->hwtid);
336 if (xa_empty(&ep->com.dev->hwtids))
337 wake_up(&ep->com.dev->wait);
338 xa_unlock_irqrestore(&ep->com.dev->hwtids, flags);
339 }
340
insert_ep_tid(struct c4iw_ep * ep)341 static int insert_ep_tid(struct c4iw_ep *ep)
342 {
343 unsigned long flags;
344 int err;
345
346 xa_lock_irqsave(&ep->com.dev->hwtids, flags);
347 err = __xa_insert(&ep->com.dev->hwtids, ep->hwtid, ep, GFP_KERNEL);
348 xa_unlock_irqrestore(&ep->com.dev->hwtids, flags);
349
350 return err;
351 }
352
353 /*
354 * Atomically lookup the ep ptr given the tid and grab a reference on the ep.
355 */
get_ep_from_tid(struct c4iw_dev * dev,unsigned int tid)356 static struct c4iw_ep *get_ep_from_tid(struct c4iw_dev *dev, unsigned int tid)
357 {
358 struct c4iw_ep *ep;
359 unsigned long flags;
360
361 xa_lock_irqsave(&dev->hwtids, flags);
362 ep = xa_load(&dev->hwtids, tid);
363 if (ep)
364 c4iw_get_ep(&ep->com);
365 xa_unlock_irqrestore(&dev->hwtids, flags);
366 return ep;
367 }
368
369 /*
370 * Atomically lookup the ep ptr given the stid and grab a reference on the ep.
371 */
get_ep_from_stid(struct c4iw_dev * dev,unsigned int stid)372 static struct c4iw_listen_ep *get_ep_from_stid(struct c4iw_dev *dev,
373 unsigned int stid)
374 {
375 struct c4iw_listen_ep *ep;
376 unsigned long flags;
377
378 xa_lock_irqsave(&dev->stids, flags);
379 ep = xa_load(&dev->stids, stid);
380 if (ep)
381 c4iw_get_ep(&ep->com);
382 xa_unlock_irqrestore(&dev->stids, flags);
383 return ep;
384 }
385
_c4iw_free_ep(struct kref * kref)386 void _c4iw_free_ep(struct kref *kref)
387 {
388 struct c4iw_ep *ep;
389
390 ep = container_of(kref, struct c4iw_ep, com.kref);
391 pr_debug("ep %p state %s\n", ep, states[ep->com.state]);
392 if (test_bit(QP_REFERENCED, &ep->com.flags))
393 deref_qp(ep);
394 if (test_bit(RELEASE_RESOURCES, &ep->com.flags)) {
395 if (ep->com.remote_addr.ss_family == AF_INET6) {
396 struct sockaddr_in6 *sin6 =
397 (struct sockaddr_in6 *)
398 &ep->com.local_addr;
399
400 cxgb4_clip_release(
401 ep->com.dev->rdev.lldi.ports[0],
402 (const u32 *)&sin6->sin6_addr.s6_addr,
403 1);
404 }
405 cxgb4_remove_tid(ep->com.dev->rdev.lldi.tids, 0, ep->hwtid,
406 ep->com.local_addr.ss_family);
407 dst_release(ep->dst);
408 cxgb4_l2t_release(ep->l2t);
409 kfree_skb(ep->mpa_skb);
410 }
411 if (!skb_queue_empty(&ep->com.ep_skb_list))
412 skb_queue_purge(&ep->com.ep_skb_list);
413 c4iw_put_wr_wait(ep->com.wr_waitp);
414 kfree(ep);
415 }
416
release_ep_resources(struct c4iw_ep * ep)417 static void release_ep_resources(struct c4iw_ep *ep)
418 {
419 set_bit(RELEASE_RESOURCES, &ep->com.flags);
420
421 /*
422 * If we have a hwtid, then remove it from the idr table
423 * so lookups will no longer find this endpoint. Otherwise
424 * we have a race where one thread finds the ep ptr just
425 * before the other thread is freeing the ep memory.
426 */
427 if (ep->hwtid != -1)
428 remove_ep_tid(ep);
429 c4iw_put_ep(&ep->com);
430 }
431
status2errno(int status)432 static int status2errno(int status)
433 {
434 switch (status) {
435 case CPL_ERR_NONE:
436 return 0;
437 case CPL_ERR_CONN_RESET:
438 return -ECONNRESET;
439 case CPL_ERR_ARP_MISS:
440 return -EHOSTUNREACH;
441 case CPL_ERR_CONN_TIMEDOUT:
442 return -ETIMEDOUT;
443 case CPL_ERR_TCAM_FULL:
444 return -ENOMEM;
445 case CPL_ERR_CONN_EXIST:
446 return -EADDRINUSE;
447 default:
448 return -EIO;
449 }
450 }
451
452 /*
453 * Try and reuse skbs already allocated...
454 */
get_skb(struct sk_buff * skb,int len,gfp_t gfp)455 static struct sk_buff *get_skb(struct sk_buff *skb, int len, gfp_t gfp)
456 {
457 if (skb && !skb_is_nonlinear(skb) && !skb_cloned(skb)) {
458 skb_trim(skb, 0);
459 skb_get(skb);
460 skb_reset_transport_header(skb);
461 } else {
462 skb = alloc_skb(len, gfp);
463 if (!skb)
464 return NULL;
465 }
466 t4_set_arp_err_handler(skb, NULL, NULL);
467 return skb;
468 }
469
get_real_dev(struct net_device * egress_dev)470 static struct net_device *get_real_dev(struct net_device *egress_dev)
471 {
472 return rdma_vlan_dev_real_dev(egress_dev) ? : egress_dev;
473 }
474
arp_failure_discard(void * handle,struct sk_buff * skb)475 static void arp_failure_discard(void *handle, struct sk_buff *skb)
476 {
477 pr_err("ARP failure\n");
478 kfree_skb(skb);
479 }
480
mpa_start_arp_failure(void * handle,struct sk_buff * skb)481 static void mpa_start_arp_failure(void *handle, struct sk_buff *skb)
482 {
483 pr_err("ARP failure during MPA Negotiation - Closing Connection\n");
484 }
485
486 enum {
487 NUM_FAKE_CPLS = 2,
488 FAKE_CPL_PUT_EP_SAFE = NUM_CPL_CMDS + 0,
489 FAKE_CPL_PASS_PUT_EP_SAFE = NUM_CPL_CMDS + 1,
490 };
491
_put_ep_safe(struct c4iw_dev * dev,struct sk_buff * skb)492 static int _put_ep_safe(struct c4iw_dev *dev, struct sk_buff *skb)
493 {
494 struct c4iw_ep *ep;
495
496 ep = *((struct c4iw_ep **)(skb->cb + 2 * sizeof(void *)));
497 release_ep_resources(ep);
498 return 0;
499 }
500
_put_pass_ep_safe(struct c4iw_dev * dev,struct sk_buff * skb)501 static int _put_pass_ep_safe(struct c4iw_dev *dev, struct sk_buff *skb)
502 {
503 struct c4iw_ep *ep;
504
505 ep = *((struct c4iw_ep **)(skb->cb + 2 * sizeof(void *)));
506 c4iw_put_ep(&ep->parent_ep->com);
507 release_ep_resources(ep);
508 return 0;
509 }
510
511 /*
512 * Fake up a special CPL opcode and call sched() so process_work() will call
513 * _put_ep_safe() in a safe context to free the ep resources. This is needed
514 * because ARP error handlers are called in an ATOMIC context, and
515 * _c4iw_free_ep() needs to block.
516 */
queue_arp_failure_cpl(struct c4iw_ep * ep,struct sk_buff * skb,int cpl)517 static void queue_arp_failure_cpl(struct c4iw_ep *ep, struct sk_buff *skb,
518 int cpl)
519 {
520 struct cpl_act_establish *rpl = cplhdr(skb);
521
522 /* Set our special ARP_FAILURE opcode */
523 rpl->ot.opcode = cpl;
524
525 /*
526 * Save ep in the skb->cb area, after where sched() will save the dev
527 * ptr.
528 */
529 *((struct c4iw_ep **)(skb->cb + 2 * sizeof(void *))) = ep;
530 sched(ep->com.dev, skb);
531 }
532
533 /* Handle an ARP failure for an accept */
pass_accept_rpl_arp_failure(void * handle,struct sk_buff * skb)534 static void pass_accept_rpl_arp_failure(void *handle, struct sk_buff *skb)
535 {
536 struct c4iw_ep *ep = handle;
537
538 pr_err("ARP failure during accept - tid %u - dropping connection\n",
539 ep->hwtid);
540
541 __state_set(&ep->com, DEAD);
542 queue_arp_failure_cpl(ep, skb, FAKE_CPL_PASS_PUT_EP_SAFE);
543 }
544
545 /*
546 * Handle an ARP failure for an active open.
547 */
act_open_req_arp_failure(void * handle,struct sk_buff * skb)548 static void act_open_req_arp_failure(void *handle, struct sk_buff *skb)
549 {
550 struct c4iw_ep *ep = handle;
551
552 pr_err("ARP failure during connect\n");
553 connect_reply_upcall(ep, -EHOSTUNREACH);
554 __state_set(&ep->com, DEAD);
555 if (ep->com.remote_addr.ss_family == AF_INET6) {
556 struct sockaddr_in6 *sin6 =
557 (struct sockaddr_in6 *)&ep->com.local_addr;
558 cxgb4_clip_release(ep->com.dev->rdev.lldi.ports[0],
559 (const u32 *)&sin6->sin6_addr.s6_addr, 1);
560 }
561 xa_erase_irq(&ep->com.dev->atids, ep->atid);
562 cxgb4_free_atid(ep->com.dev->rdev.lldi.tids, ep->atid);
563 queue_arp_failure_cpl(ep, skb, FAKE_CPL_PUT_EP_SAFE);
564 }
565
566 /*
567 * Handle an ARP failure for a CPL_ABORT_REQ. Change it into a no RST variant
568 * and send it along.
569 */
abort_arp_failure(void * handle,struct sk_buff * skb)570 static void abort_arp_failure(void *handle, struct sk_buff *skb)
571 {
572 int ret;
573 struct c4iw_ep *ep = handle;
574 struct c4iw_rdev *rdev = &ep->com.dev->rdev;
575 struct cpl_abort_req *req = cplhdr(skb);
576
577 pr_debug("rdev %p\n", rdev);
578 req->cmd = CPL_ABORT_NO_RST;
579 skb_get(skb);
580 ret = c4iw_ofld_send(rdev, skb);
581 if (ret) {
582 __state_set(&ep->com, DEAD);
583 queue_arp_failure_cpl(ep, skb, FAKE_CPL_PUT_EP_SAFE);
584 } else
585 kfree_skb(skb);
586 }
587
send_flowc(struct c4iw_ep * ep)588 static int send_flowc(struct c4iw_ep *ep)
589 {
590 struct fw_flowc_wr *flowc;
591 struct sk_buff *skb = skb_dequeue(&ep->com.ep_skb_list);
592 u16 vlan = ep->l2t->vlan;
593 int nparams;
594 int flowclen, flowclen16;
595
596 if (WARN_ON(!skb))
597 return -ENOMEM;
598
599 if (vlan == CPL_L2T_VLAN_NONE)
600 nparams = 9;
601 else
602 nparams = 10;
603
604 flowclen = offsetof(struct fw_flowc_wr, mnemval[nparams]);
605 flowclen16 = DIV_ROUND_UP(flowclen, 16);
606 flowclen = flowclen16 * 16;
607
608 flowc = __skb_put(skb, flowclen);
609 memset(flowc, 0, flowclen);
610
611 flowc->op_to_nparams = cpu_to_be32(FW_WR_OP_V(FW_FLOWC_WR) |
612 FW_FLOWC_WR_NPARAMS_V(nparams));
613 flowc->flowid_len16 = cpu_to_be32(FW_WR_LEN16_V(flowclen16) |
614 FW_WR_FLOWID_V(ep->hwtid));
615
616 flowc->mnemval[0].mnemonic = FW_FLOWC_MNEM_PFNVFN;
617 flowc->mnemval[0].val = cpu_to_be32(FW_PFVF_CMD_PFN_V
618 (ep->com.dev->rdev.lldi.pf));
619 flowc->mnemval[1].mnemonic = FW_FLOWC_MNEM_CH;
620 flowc->mnemval[1].val = cpu_to_be32(ep->tx_chan);
621 flowc->mnemval[2].mnemonic = FW_FLOWC_MNEM_PORT;
622 flowc->mnemval[2].val = cpu_to_be32(ep->tx_chan);
623 flowc->mnemval[3].mnemonic = FW_FLOWC_MNEM_IQID;
624 flowc->mnemval[3].val = cpu_to_be32(ep->rss_qid);
625 flowc->mnemval[4].mnemonic = FW_FLOWC_MNEM_SNDNXT;
626 flowc->mnemval[4].val = cpu_to_be32(ep->snd_seq);
627 flowc->mnemval[5].mnemonic = FW_FLOWC_MNEM_RCVNXT;
628 flowc->mnemval[5].val = cpu_to_be32(ep->rcv_seq);
629 flowc->mnemval[6].mnemonic = FW_FLOWC_MNEM_SNDBUF;
630 flowc->mnemval[6].val = cpu_to_be32(ep->snd_win);
631 flowc->mnemval[7].mnemonic = FW_FLOWC_MNEM_MSS;
632 flowc->mnemval[7].val = cpu_to_be32(ep->emss);
633 flowc->mnemval[8].mnemonic = FW_FLOWC_MNEM_RCV_SCALE;
634 flowc->mnemval[8].val = cpu_to_be32(ep->snd_wscale);
635 if (nparams == 10) {
636 u16 pri;
637 pri = (vlan & VLAN_PRIO_MASK) >> VLAN_PRIO_SHIFT;
638 flowc->mnemval[9].mnemonic = FW_FLOWC_MNEM_SCHEDCLASS;
639 flowc->mnemval[9].val = cpu_to_be32(pri);
640 }
641
642 set_wr_txq(skb, CPL_PRIORITY_DATA, ep->txq_idx);
643 return c4iw_ofld_send(&ep->com.dev->rdev, skb);
644 }
645
send_halfclose(struct c4iw_ep * ep)646 static int send_halfclose(struct c4iw_ep *ep)
647 {
648 struct sk_buff *skb = skb_dequeue(&ep->com.ep_skb_list);
649 u32 wrlen = roundup(sizeof(struct cpl_close_con_req), 16);
650
651 pr_debug("ep %p tid %u\n", ep, ep->hwtid);
652 if (WARN_ON(!skb))
653 return -ENOMEM;
654
655 cxgb_mk_close_con_req(skb, wrlen, ep->hwtid, ep->txq_idx,
656 NULL, arp_failure_discard);
657
658 return c4iw_l2t_send(&ep->com.dev->rdev, skb, ep->l2t);
659 }
660
read_tcb(struct c4iw_ep * ep)661 static void read_tcb(struct c4iw_ep *ep)
662 {
663 struct sk_buff *skb;
664 struct cpl_get_tcb *req;
665 int wrlen = roundup(sizeof(*req), 16);
666
667 skb = get_skb(NULL, sizeof(*req), GFP_KERNEL);
668 if (WARN_ON(!skb))
669 return;
670
671 set_wr_txq(skb, CPL_PRIORITY_CONTROL, ep->ctrlq_idx);
672 req = (struct cpl_get_tcb *) skb_put(skb, wrlen);
673 memset(req, 0, wrlen);
674 INIT_TP_WR(req, ep->hwtid);
675 OPCODE_TID(req) = cpu_to_be32(MK_OPCODE_TID(CPL_GET_TCB, ep->hwtid));
676 req->reply_ctrl = htons(REPLY_CHAN_V(0) | QUEUENO_V(ep->rss_qid));
677
678 /*
679 * keep a ref on the ep so the tcb is not unlocked before this
680 * cpl completes. The ref is released in read_tcb_rpl().
681 */
682 c4iw_get_ep(&ep->com);
683 if (WARN_ON(c4iw_ofld_send(&ep->com.dev->rdev, skb)))
684 c4iw_put_ep(&ep->com);
685 }
686
send_abort_req(struct c4iw_ep * ep)687 static int send_abort_req(struct c4iw_ep *ep)
688 {
689 u32 wrlen = roundup(sizeof(struct cpl_abort_req), 16);
690 struct sk_buff *req_skb = skb_dequeue(&ep->com.ep_skb_list);
691
692 pr_debug("ep %p tid %u\n", ep, ep->hwtid);
693 if (WARN_ON(!req_skb))
694 return -ENOMEM;
695
696 cxgb_mk_abort_req(req_skb, wrlen, ep->hwtid, ep->txq_idx,
697 ep, abort_arp_failure);
698
699 return c4iw_l2t_send(&ep->com.dev->rdev, req_skb, ep->l2t);
700 }
701
send_abort(struct c4iw_ep * ep)702 static int send_abort(struct c4iw_ep *ep)
703 {
704 if (!ep->com.qp || !ep->com.qp->srq) {
705 send_abort_req(ep);
706 return 0;
707 }
708 set_bit(ABORT_REQ_IN_PROGRESS, &ep->com.flags);
709 read_tcb(ep);
710 return 0;
711 }
712
send_connect(struct c4iw_ep * ep)713 static int send_connect(struct c4iw_ep *ep)
714 {
715 struct cpl_act_open_req *req = NULL;
716 struct cpl_t5_act_open_req *t5req = NULL;
717 struct cpl_t6_act_open_req *t6req = NULL;
718 struct cpl_act_open_req6 *req6 = NULL;
719 struct cpl_t5_act_open_req6 *t5req6 = NULL;
720 struct cpl_t6_act_open_req6 *t6req6 = NULL;
721 struct sk_buff *skb;
722 u64 opt0;
723 u32 opt2;
724 unsigned int mtu_idx;
725 u32 wscale;
726 int win, sizev4, sizev6, wrlen;
727 struct sockaddr_in *la = (struct sockaddr_in *)
728 &ep->com.local_addr;
729 struct sockaddr_in *ra = (struct sockaddr_in *)
730 &ep->com.remote_addr;
731 struct sockaddr_in6 *la6 = (struct sockaddr_in6 *)
732 &ep->com.local_addr;
733 struct sockaddr_in6 *ra6 = (struct sockaddr_in6 *)
734 &ep->com.remote_addr;
735 int ret;
736 enum chip_type adapter_type = ep->com.dev->rdev.lldi.adapter_type;
737 u32 isn = (prandom_u32() & ~7UL) - 1;
738 struct net_device *netdev;
739 u64 params;
740
741 netdev = ep->com.dev->rdev.lldi.ports[0];
742
743 switch (CHELSIO_CHIP_VERSION(adapter_type)) {
744 case CHELSIO_T4:
745 sizev4 = sizeof(struct cpl_act_open_req);
746 sizev6 = sizeof(struct cpl_act_open_req6);
747 break;
748 case CHELSIO_T5:
749 sizev4 = sizeof(struct cpl_t5_act_open_req);
750 sizev6 = sizeof(struct cpl_t5_act_open_req6);
751 break;
752 case CHELSIO_T6:
753 sizev4 = sizeof(struct cpl_t6_act_open_req);
754 sizev6 = sizeof(struct cpl_t6_act_open_req6);
755 break;
756 default:
757 pr_err("T%d Chip is not supported\n",
758 CHELSIO_CHIP_VERSION(adapter_type));
759 return -EINVAL;
760 }
761
762 wrlen = (ep->com.remote_addr.ss_family == AF_INET) ?
763 roundup(sizev4, 16) :
764 roundup(sizev6, 16);
765
766 pr_debug("ep %p atid %u\n", ep, ep->atid);
767
768 skb = get_skb(NULL, wrlen, GFP_KERNEL);
769 if (!skb) {
770 pr_err("%s - failed to alloc skb\n", __func__);
771 return -ENOMEM;
772 }
773 set_wr_txq(skb, CPL_PRIORITY_SETUP, ep->ctrlq_idx);
774
775 cxgb_best_mtu(ep->com.dev->rdev.lldi.mtus, ep->mtu, &mtu_idx,
776 enable_tcp_timestamps,
777 (ep->com.remote_addr.ss_family == AF_INET) ? 0 : 1);
778 wscale = cxgb_compute_wscale(rcv_win);
779
780 /*
781 * Specify the largest window that will fit in opt0. The
782 * remainder will be specified in the rx_data_ack.
783 */
784 win = ep->rcv_win >> 10;
785 if (win > RCV_BUFSIZ_M)
786 win = RCV_BUFSIZ_M;
787
788 opt0 = (nocong ? NO_CONG_F : 0) |
789 KEEP_ALIVE_F |
790 DELACK_F |
791 WND_SCALE_V(wscale) |
792 MSS_IDX_V(mtu_idx) |
793 L2T_IDX_V(ep->l2t->idx) |
794 TX_CHAN_V(ep->tx_chan) |
795 SMAC_SEL_V(ep->smac_idx) |
796 DSCP_V(ep->tos >> 2) |
797 ULP_MODE_V(ULP_MODE_TCPDDP) |
798 RCV_BUFSIZ_V(win);
799 opt2 = RX_CHANNEL_V(0) |
800 CCTRL_ECN_V(enable_ecn) |
801 RSS_QUEUE_VALID_F | RSS_QUEUE_V(ep->rss_qid);
802 if (enable_tcp_timestamps)
803 opt2 |= TSTAMPS_EN_F;
804 if (enable_tcp_sack)
805 opt2 |= SACK_EN_F;
806 if (wscale && enable_tcp_window_scaling)
807 opt2 |= WND_SCALE_EN_F;
808 if (CHELSIO_CHIP_VERSION(adapter_type) > CHELSIO_T4) {
809 if (peer2peer)
810 isn += 4;
811
812 opt2 |= T5_OPT_2_VALID_F;
813 opt2 |= CONG_CNTRL_V(CONG_ALG_TAHOE);
814 opt2 |= T5_ISS_F;
815 }
816
817 params = cxgb4_select_ntuple(netdev, ep->l2t);
818
819 if (ep->com.remote_addr.ss_family == AF_INET6)
820 cxgb4_clip_get(ep->com.dev->rdev.lldi.ports[0],
821 (const u32 *)&la6->sin6_addr.s6_addr, 1);
822
823 t4_set_arp_err_handler(skb, ep, act_open_req_arp_failure);
824
825 if (ep->com.remote_addr.ss_family == AF_INET) {
826 switch (CHELSIO_CHIP_VERSION(adapter_type)) {
827 case CHELSIO_T4:
828 req = skb_put(skb, wrlen);
829 INIT_TP_WR(req, 0);
830 break;
831 case CHELSIO_T5:
832 t5req = skb_put(skb, wrlen);
833 INIT_TP_WR(t5req, 0);
834 req = (struct cpl_act_open_req *)t5req;
835 break;
836 case CHELSIO_T6:
837 t6req = skb_put(skb, wrlen);
838 INIT_TP_WR(t6req, 0);
839 req = (struct cpl_act_open_req *)t6req;
840 t5req = (struct cpl_t5_act_open_req *)t6req;
841 break;
842 default:
843 pr_err("T%d Chip is not supported\n",
844 CHELSIO_CHIP_VERSION(adapter_type));
845 ret = -EINVAL;
846 goto clip_release;
847 }
848
849 OPCODE_TID(req) = cpu_to_be32(MK_OPCODE_TID(CPL_ACT_OPEN_REQ,
850 ((ep->rss_qid<<14) | ep->atid)));
851 req->local_port = la->sin_port;
852 req->peer_port = ra->sin_port;
853 req->local_ip = la->sin_addr.s_addr;
854 req->peer_ip = ra->sin_addr.s_addr;
855 req->opt0 = cpu_to_be64(opt0);
856
857 if (is_t4(ep->com.dev->rdev.lldi.adapter_type)) {
858 req->params = cpu_to_be32(params);
859 req->opt2 = cpu_to_be32(opt2);
860 } else {
861 if (is_t5(ep->com.dev->rdev.lldi.adapter_type)) {
862 t5req->params =
863 cpu_to_be64(FILTER_TUPLE_V(params));
864 t5req->rsvd = cpu_to_be32(isn);
865 pr_debug("snd_isn %u\n", t5req->rsvd);
866 t5req->opt2 = cpu_to_be32(opt2);
867 } else {
868 t6req->params =
869 cpu_to_be64(FILTER_TUPLE_V(params));
870 t6req->rsvd = cpu_to_be32(isn);
871 pr_debug("snd_isn %u\n", t6req->rsvd);
872 t6req->opt2 = cpu_to_be32(opt2);
873 }
874 }
875 } else {
876 switch (CHELSIO_CHIP_VERSION(adapter_type)) {
877 case CHELSIO_T4:
878 req6 = skb_put(skb, wrlen);
879 INIT_TP_WR(req6, 0);
880 break;
881 case CHELSIO_T5:
882 t5req6 = skb_put(skb, wrlen);
883 INIT_TP_WR(t5req6, 0);
884 req6 = (struct cpl_act_open_req6 *)t5req6;
885 break;
886 case CHELSIO_T6:
887 t6req6 = skb_put(skb, wrlen);
888 INIT_TP_WR(t6req6, 0);
889 req6 = (struct cpl_act_open_req6 *)t6req6;
890 t5req6 = (struct cpl_t5_act_open_req6 *)t6req6;
891 break;
892 default:
893 pr_err("T%d Chip is not supported\n",
894 CHELSIO_CHIP_VERSION(adapter_type));
895 ret = -EINVAL;
896 goto clip_release;
897 }
898
899 OPCODE_TID(req6) = cpu_to_be32(MK_OPCODE_TID(CPL_ACT_OPEN_REQ6,
900 ((ep->rss_qid<<14)|ep->atid)));
901 req6->local_port = la6->sin6_port;
902 req6->peer_port = ra6->sin6_port;
903 req6->local_ip_hi = *((__be64 *)(la6->sin6_addr.s6_addr));
904 req6->local_ip_lo = *((__be64 *)(la6->sin6_addr.s6_addr + 8));
905 req6->peer_ip_hi = *((__be64 *)(ra6->sin6_addr.s6_addr));
906 req6->peer_ip_lo = *((__be64 *)(ra6->sin6_addr.s6_addr + 8));
907 req6->opt0 = cpu_to_be64(opt0);
908
909 if (is_t4(ep->com.dev->rdev.lldi.adapter_type)) {
910 req6->params = cpu_to_be32(cxgb4_select_ntuple(netdev,
911 ep->l2t));
912 req6->opt2 = cpu_to_be32(opt2);
913 } else {
914 if (is_t5(ep->com.dev->rdev.lldi.adapter_type)) {
915 t5req6->params =
916 cpu_to_be64(FILTER_TUPLE_V(params));
917 t5req6->rsvd = cpu_to_be32(isn);
918 pr_debug("snd_isn %u\n", t5req6->rsvd);
919 t5req6->opt2 = cpu_to_be32(opt2);
920 } else {
921 t6req6->params =
922 cpu_to_be64(FILTER_TUPLE_V(params));
923 t6req6->rsvd = cpu_to_be32(isn);
924 pr_debug("snd_isn %u\n", t6req6->rsvd);
925 t6req6->opt2 = cpu_to_be32(opt2);
926 }
927
928 }
929 }
930
931 set_bit(ACT_OPEN_REQ, &ep->com.history);
932 ret = c4iw_l2t_send(&ep->com.dev->rdev, skb, ep->l2t);
933 clip_release:
934 if (ret && ep->com.remote_addr.ss_family == AF_INET6)
935 cxgb4_clip_release(ep->com.dev->rdev.lldi.ports[0],
936 (const u32 *)&la6->sin6_addr.s6_addr, 1);
937 return ret;
938 }
939
send_mpa_req(struct c4iw_ep * ep,struct sk_buff * skb,u8 mpa_rev_to_use)940 static int send_mpa_req(struct c4iw_ep *ep, struct sk_buff *skb,
941 u8 mpa_rev_to_use)
942 {
943 int mpalen, wrlen, ret;
944 struct fw_ofld_tx_data_wr *req;
945 struct mpa_message *mpa;
946 struct mpa_v2_conn_params mpa_v2_params;
947
948 pr_debug("ep %p tid %u pd_len %d\n",
949 ep, ep->hwtid, ep->plen);
950
951 mpalen = sizeof(*mpa) + ep->plen;
952 if (mpa_rev_to_use == 2)
953 mpalen += sizeof(struct mpa_v2_conn_params);
954 wrlen = roundup(mpalen + sizeof(*req), 16);
955 skb = get_skb(skb, wrlen, GFP_KERNEL);
956 if (!skb) {
957 connect_reply_upcall(ep, -ENOMEM);
958 return -ENOMEM;
959 }
960 set_wr_txq(skb, CPL_PRIORITY_DATA, ep->txq_idx);
961
962 req = skb_put_zero(skb, wrlen);
963 req->op_to_immdlen = cpu_to_be32(
964 FW_WR_OP_V(FW_OFLD_TX_DATA_WR) |
965 FW_WR_COMPL_F |
966 FW_WR_IMMDLEN_V(mpalen));
967 req->flowid_len16 = cpu_to_be32(
968 FW_WR_FLOWID_V(ep->hwtid) |
969 FW_WR_LEN16_V(wrlen >> 4));
970 req->plen = cpu_to_be32(mpalen);
971 req->tunnel_to_proxy = cpu_to_be32(
972 FW_OFLD_TX_DATA_WR_FLUSH_F |
973 FW_OFLD_TX_DATA_WR_SHOVE_F);
974
975 mpa = (struct mpa_message *)(req + 1);
976 memcpy(mpa->key, MPA_KEY_REQ, sizeof(mpa->key));
977
978 mpa->flags = 0;
979 if (crc_enabled)
980 mpa->flags |= MPA_CRC;
981 if (markers_enabled) {
982 mpa->flags |= MPA_MARKERS;
983 ep->mpa_attr.recv_marker_enabled = 1;
984 } else {
985 ep->mpa_attr.recv_marker_enabled = 0;
986 }
987 if (mpa_rev_to_use == 2)
988 mpa->flags |= MPA_ENHANCED_RDMA_CONN;
989
990 mpa->private_data_size = htons(ep->plen);
991 mpa->revision = mpa_rev_to_use;
992 if (mpa_rev_to_use == 1) {
993 ep->tried_with_mpa_v1 = 1;
994 ep->retry_with_mpa_v1 = 0;
995 }
996
997 if (mpa_rev_to_use == 2) {
998 mpa->private_data_size =
999 htons(ntohs(mpa->private_data_size) +
1000 sizeof(struct mpa_v2_conn_params));
1001 pr_debug("initiator ird %u ord %u\n", ep->ird,
1002 ep->ord);
1003 mpa_v2_params.ird = htons((u16)ep->ird);
1004 mpa_v2_params.ord = htons((u16)ep->ord);
1005
1006 if (peer2peer) {
1007 mpa_v2_params.ird |= htons(MPA_V2_PEER2PEER_MODEL);
1008 if (p2p_type == FW_RI_INIT_P2PTYPE_RDMA_WRITE)
1009 mpa_v2_params.ord |=
1010 htons(MPA_V2_RDMA_WRITE_RTR);
1011 else if (p2p_type == FW_RI_INIT_P2PTYPE_READ_REQ)
1012 mpa_v2_params.ord |=
1013 htons(MPA_V2_RDMA_READ_RTR);
1014 }
1015 memcpy(mpa->private_data, &mpa_v2_params,
1016 sizeof(struct mpa_v2_conn_params));
1017
1018 if (ep->plen)
1019 memcpy(mpa->private_data +
1020 sizeof(struct mpa_v2_conn_params),
1021 ep->mpa_pkt + sizeof(*mpa), ep->plen);
1022 } else
1023 if (ep->plen)
1024 memcpy(mpa->private_data,
1025 ep->mpa_pkt + sizeof(*mpa), ep->plen);
1026
1027 /*
1028 * Reference the mpa skb. This ensures the data area
1029 * will remain in memory until the hw acks the tx.
1030 * Function fw4_ack() will deref it.
1031 */
1032 skb_get(skb);
1033 t4_set_arp_err_handler(skb, NULL, arp_failure_discard);
1034 ep->mpa_skb = skb;
1035 ret = c4iw_l2t_send(&ep->com.dev->rdev, skb, ep->l2t);
1036 if (ret)
1037 return ret;
1038 start_ep_timer(ep);
1039 __state_set(&ep->com, MPA_REQ_SENT);
1040 ep->mpa_attr.initiator = 1;
1041 ep->snd_seq += mpalen;
1042 return ret;
1043 }
1044
send_mpa_reject(struct c4iw_ep * ep,const void * pdata,u8 plen)1045 static int send_mpa_reject(struct c4iw_ep *ep, const void *pdata, u8 plen)
1046 {
1047 int mpalen, wrlen;
1048 struct fw_ofld_tx_data_wr *req;
1049 struct mpa_message *mpa;
1050 struct sk_buff *skb;
1051 struct mpa_v2_conn_params mpa_v2_params;
1052
1053 pr_debug("ep %p tid %u pd_len %d\n",
1054 ep, ep->hwtid, ep->plen);
1055
1056 mpalen = sizeof(*mpa) + plen;
1057 if (ep->mpa_attr.version == 2 && ep->mpa_attr.enhanced_rdma_conn)
1058 mpalen += sizeof(struct mpa_v2_conn_params);
1059 wrlen = roundup(mpalen + sizeof(*req), 16);
1060
1061 skb = get_skb(NULL, wrlen, GFP_KERNEL);
1062 if (!skb) {
1063 pr_err("%s - cannot alloc skb!\n", __func__);
1064 return -ENOMEM;
1065 }
1066 set_wr_txq(skb, CPL_PRIORITY_DATA, ep->txq_idx);
1067
1068 req = skb_put_zero(skb, wrlen);
1069 req->op_to_immdlen = cpu_to_be32(
1070 FW_WR_OP_V(FW_OFLD_TX_DATA_WR) |
1071 FW_WR_COMPL_F |
1072 FW_WR_IMMDLEN_V(mpalen));
1073 req->flowid_len16 = cpu_to_be32(
1074 FW_WR_FLOWID_V(ep->hwtid) |
1075 FW_WR_LEN16_V(wrlen >> 4));
1076 req->plen = cpu_to_be32(mpalen);
1077 req->tunnel_to_proxy = cpu_to_be32(
1078 FW_OFLD_TX_DATA_WR_FLUSH_F |
1079 FW_OFLD_TX_DATA_WR_SHOVE_F);
1080
1081 mpa = (struct mpa_message *)(req + 1);
1082 memset(mpa, 0, sizeof(*mpa));
1083 memcpy(mpa->key, MPA_KEY_REP, sizeof(mpa->key));
1084 mpa->flags = MPA_REJECT;
1085 mpa->revision = ep->mpa_attr.version;
1086 mpa->private_data_size = htons(plen);
1087
1088 if (ep->mpa_attr.version == 2 && ep->mpa_attr.enhanced_rdma_conn) {
1089 mpa->flags |= MPA_ENHANCED_RDMA_CONN;
1090 mpa->private_data_size =
1091 htons(ntohs(mpa->private_data_size) +
1092 sizeof(struct mpa_v2_conn_params));
1093 mpa_v2_params.ird = htons(((u16)ep->ird) |
1094 (peer2peer ? MPA_V2_PEER2PEER_MODEL :
1095 0));
1096 mpa_v2_params.ord = htons(((u16)ep->ord) | (peer2peer ?
1097 (p2p_type ==
1098 FW_RI_INIT_P2PTYPE_RDMA_WRITE ?
1099 MPA_V2_RDMA_WRITE_RTR : p2p_type ==
1100 FW_RI_INIT_P2PTYPE_READ_REQ ?
1101 MPA_V2_RDMA_READ_RTR : 0) : 0));
1102 memcpy(mpa->private_data, &mpa_v2_params,
1103 sizeof(struct mpa_v2_conn_params));
1104
1105 if (ep->plen)
1106 memcpy(mpa->private_data +
1107 sizeof(struct mpa_v2_conn_params), pdata, plen);
1108 } else
1109 if (plen)
1110 memcpy(mpa->private_data, pdata, plen);
1111
1112 /*
1113 * Reference the mpa skb again. This ensures the data area
1114 * will remain in memory until the hw acks the tx.
1115 * Function fw4_ack() will deref it.
1116 */
1117 skb_get(skb);
1118 set_wr_txq(skb, CPL_PRIORITY_DATA, ep->txq_idx);
1119 t4_set_arp_err_handler(skb, NULL, mpa_start_arp_failure);
1120 ep->mpa_skb = skb;
1121 ep->snd_seq += mpalen;
1122 return c4iw_l2t_send(&ep->com.dev->rdev, skb, ep->l2t);
1123 }
1124
send_mpa_reply(struct c4iw_ep * ep,const void * pdata,u8 plen)1125 static int send_mpa_reply(struct c4iw_ep *ep, const void *pdata, u8 plen)
1126 {
1127 int mpalen, wrlen;
1128 struct fw_ofld_tx_data_wr *req;
1129 struct mpa_message *mpa;
1130 struct sk_buff *skb;
1131 struct mpa_v2_conn_params mpa_v2_params;
1132
1133 pr_debug("ep %p tid %u pd_len %d\n",
1134 ep, ep->hwtid, ep->plen);
1135
1136 mpalen = sizeof(*mpa) + plen;
1137 if (ep->mpa_attr.version == 2 && ep->mpa_attr.enhanced_rdma_conn)
1138 mpalen += sizeof(struct mpa_v2_conn_params);
1139 wrlen = roundup(mpalen + sizeof(*req), 16);
1140
1141 skb = get_skb(NULL, wrlen, GFP_KERNEL);
1142 if (!skb) {
1143 pr_err("%s - cannot alloc skb!\n", __func__);
1144 return -ENOMEM;
1145 }
1146 set_wr_txq(skb, CPL_PRIORITY_DATA, ep->txq_idx);
1147
1148 req = skb_put_zero(skb, wrlen);
1149 req->op_to_immdlen = cpu_to_be32(
1150 FW_WR_OP_V(FW_OFLD_TX_DATA_WR) |
1151 FW_WR_COMPL_F |
1152 FW_WR_IMMDLEN_V(mpalen));
1153 req->flowid_len16 = cpu_to_be32(
1154 FW_WR_FLOWID_V(ep->hwtid) |
1155 FW_WR_LEN16_V(wrlen >> 4));
1156 req->plen = cpu_to_be32(mpalen);
1157 req->tunnel_to_proxy = cpu_to_be32(
1158 FW_OFLD_TX_DATA_WR_FLUSH_F |
1159 FW_OFLD_TX_DATA_WR_SHOVE_F);
1160
1161 mpa = (struct mpa_message *)(req + 1);
1162 memset(mpa, 0, sizeof(*mpa));
1163 memcpy(mpa->key, MPA_KEY_REP, sizeof(mpa->key));
1164 mpa->flags = 0;
1165 if (ep->mpa_attr.crc_enabled)
1166 mpa->flags |= MPA_CRC;
1167 if (ep->mpa_attr.recv_marker_enabled)
1168 mpa->flags |= MPA_MARKERS;
1169 mpa->revision = ep->mpa_attr.version;
1170 mpa->private_data_size = htons(plen);
1171
1172 if (ep->mpa_attr.version == 2 && ep->mpa_attr.enhanced_rdma_conn) {
1173 mpa->flags |= MPA_ENHANCED_RDMA_CONN;
1174 mpa->private_data_size =
1175 htons(ntohs(mpa->private_data_size) +
1176 sizeof(struct mpa_v2_conn_params));
1177 mpa_v2_params.ird = htons((u16)ep->ird);
1178 mpa_v2_params.ord = htons((u16)ep->ord);
1179 if (peer2peer && (ep->mpa_attr.p2p_type !=
1180 FW_RI_INIT_P2PTYPE_DISABLED)) {
1181 mpa_v2_params.ird |= htons(MPA_V2_PEER2PEER_MODEL);
1182
1183 if (p2p_type == FW_RI_INIT_P2PTYPE_RDMA_WRITE)
1184 mpa_v2_params.ord |=
1185 htons(MPA_V2_RDMA_WRITE_RTR);
1186 else if (p2p_type == FW_RI_INIT_P2PTYPE_READ_REQ)
1187 mpa_v2_params.ord |=
1188 htons(MPA_V2_RDMA_READ_RTR);
1189 }
1190
1191 memcpy(mpa->private_data, &mpa_v2_params,
1192 sizeof(struct mpa_v2_conn_params));
1193
1194 if (ep->plen)
1195 memcpy(mpa->private_data +
1196 sizeof(struct mpa_v2_conn_params), pdata, plen);
1197 } else
1198 if (plen)
1199 memcpy(mpa->private_data, pdata, plen);
1200
1201 /*
1202 * Reference the mpa skb. This ensures the data area
1203 * will remain in memory until the hw acks the tx.
1204 * Function fw4_ack() will deref it.
1205 */
1206 skb_get(skb);
1207 t4_set_arp_err_handler(skb, NULL, mpa_start_arp_failure);
1208 ep->mpa_skb = skb;
1209 __state_set(&ep->com, MPA_REP_SENT);
1210 ep->snd_seq += mpalen;
1211 return c4iw_l2t_send(&ep->com.dev->rdev, skb, ep->l2t);
1212 }
1213
act_establish(struct c4iw_dev * dev,struct sk_buff * skb)1214 static int act_establish(struct c4iw_dev *dev, struct sk_buff *skb)
1215 {
1216 struct c4iw_ep *ep;
1217 struct cpl_act_establish *req = cplhdr(skb);
1218 unsigned short tcp_opt = ntohs(req->tcp_opt);
1219 unsigned int tid = GET_TID(req);
1220 unsigned int atid = TID_TID_G(ntohl(req->tos_atid));
1221 struct tid_info *t = dev->rdev.lldi.tids;
1222 int ret;
1223
1224 ep = lookup_atid(t, atid);
1225
1226 pr_debug("ep %p tid %u snd_isn %u rcv_isn %u\n", ep, tid,
1227 be32_to_cpu(req->snd_isn), be32_to_cpu(req->rcv_isn));
1228
1229 mutex_lock(&ep->com.mutex);
1230 dst_confirm(ep->dst);
1231
1232 /* setup the hwtid for this connection */
1233 ep->hwtid = tid;
1234 cxgb4_insert_tid(t, ep, tid, ep->com.local_addr.ss_family);
1235 insert_ep_tid(ep);
1236
1237 ep->snd_seq = be32_to_cpu(req->snd_isn);
1238 ep->rcv_seq = be32_to_cpu(req->rcv_isn);
1239 ep->snd_wscale = TCPOPT_SND_WSCALE_G(tcp_opt);
1240
1241 set_emss(ep, tcp_opt);
1242
1243 /* dealloc the atid */
1244 xa_erase_irq(&ep->com.dev->atids, atid);
1245 cxgb4_free_atid(t, atid);
1246 set_bit(ACT_ESTAB, &ep->com.history);
1247
1248 /* start MPA negotiation */
1249 ret = send_flowc(ep);
1250 if (ret)
1251 goto err;
1252 if (ep->retry_with_mpa_v1)
1253 ret = send_mpa_req(ep, skb, 1);
1254 else
1255 ret = send_mpa_req(ep, skb, mpa_rev);
1256 if (ret)
1257 goto err;
1258 mutex_unlock(&ep->com.mutex);
1259 return 0;
1260 err:
1261 mutex_unlock(&ep->com.mutex);
1262 connect_reply_upcall(ep, -ENOMEM);
1263 c4iw_ep_disconnect(ep, 0, GFP_KERNEL);
1264 return 0;
1265 }
1266
close_complete_upcall(struct c4iw_ep * ep,int status)1267 static void close_complete_upcall(struct c4iw_ep *ep, int status)
1268 {
1269 struct iw_cm_event event;
1270
1271 pr_debug("ep %p tid %u\n", ep, ep->hwtid);
1272 memset(&event, 0, sizeof(event));
1273 event.event = IW_CM_EVENT_CLOSE;
1274 event.status = status;
1275 if (ep->com.cm_id) {
1276 pr_debug("close complete delivered ep %p cm_id %p tid %u\n",
1277 ep, ep->com.cm_id, ep->hwtid);
1278 ep->com.cm_id->event_handler(ep->com.cm_id, &event);
1279 deref_cm_id(&ep->com);
1280 set_bit(CLOSE_UPCALL, &ep->com.history);
1281 }
1282 }
1283
peer_close_upcall(struct c4iw_ep * ep)1284 static void peer_close_upcall(struct c4iw_ep *ep)
1285 {
1286 struct iw_cm_event event;
1287
1288 pr_debug("ep %p tid %u\n", ep, ep->hwtid);
1289 memset(&event, 0, sizeof(event));
1290 event.event = IW_CM_EVENT_DISCONNECT;
1291 if (ep->com.cm_id) {
1292 pr_debug("peer close delivered ep %p cm_id %p tid %u\n",
1293 ep, ep->com.cm_id, ep->hwtid);
1294 ep->com.cm_id->event_handler(ep->com.cm_id, &event);
1295 set_bit(DISCONN_UPCALL, &ep->com.history);
1296 }
1297 }
1298
peer_abort_upcall(struct c4iw_ep * ep)1299 static void peer_abort_upcall(struct c4iw_ep *ep)
1300 {
1301 struct iw_cm_event event;
1302
1303 pr_debug("ep %p tid %u\n", ep, ep->hwtid);
1304 memset(&event, 0, sizeof(event));
1305 event.event = IW_CM_EVENT_CLOSE;
1306 event.status = -ECONNRESET;
1307 if (ep->com.cm_id) {
1308 pr_debug("abort delivered ep %p cm_id %p tid %u\n", ep,
1309 ep->com.cm_id, ep->hwtid);
1310 ep->com.cm_id->event_handler(ep->com.cm_id, &event);
1311 deref_cm_id(&ep->com);
1312 set_bit(ABORT_UPCALL, &ep->com.history);
1313 }
1314 }
1315
connect_reply_upcall(struct c4iw_ep * ep,int status)1316 static void connect_reply_upcall(struct c4iw_ep *ep, int status)
1317 {
1318 struct iw_cm_event event;
1319
1320 pr_debug("ep %p tid %u status %d\n",
1321 ep, ep->hwtid, status);
1322 memset(&event, 0, sizeof(event));
1323 event.event = IW_CM_EVENT_CONNECT_REPLY;
1324 event.status = status;
1325 memcpy(&event.local_addr, &ep->com.local_addr,
1326 sizeof(ep->com.local_addr));
1327 memcpy(&event.remote_addr, &ep->com.remote_addr,
1328 sizeof(ep->com.remote_addr));
1329
1330 if ((status == 0) || (status == -ECONNREFUSED)) {
1331 if (!ep->tried_with_mpa_v1) {
1332 /* this means MPA_v2 is used */
1333 event.ord = ep->ird;
1334 event.ird = ep->ord;
1335 event.private_data_len = ep->plen -
1336 sizeof(struct mpa_v2_conn_params);
1337 event.private_data = ep->mpa_pkt +
1338 sizeof(struct mpa_message) +
1339 sizeof(struct mpa_v2_conn_params);
1340 } else {
1341 /* this means MPA_v1 is used */
1342 event.ord = cur_max_read_depth(ep->com.dev);
1343 event.ird = cur_max_read_depth(ep->com.dev);
1344 event.private_data_len = ep->plen;
1345 event.private_data = ep->mpa_pkt +
1346 sizeof(struct mpa_message);
1347 }
1348 }
1349
1350 pr_debug("ep %p tid %u status %d\n", ep,
1351 ep->hwtid, status);
1352 set_bit(CONN_RPL_UPCALL, &ep->com.history);
1353 ep->com.cm_id->event_handler(ep->com.cm_id, &event);
1354
1355 if (status < 0)
1356 deref_cm_id(&ep->com);
1357 }
1358
connect_request_upcall(struct c4iw_ep * ep)1359 static int connect_request_upcall(struct c4iw_ep *ep)
1360 {
1361 struct iw_cm_event event;
1362 int ret;
1363
1364 pr_debug("ep %p tid %u\n", ep, ep->hwtid);
1365 memset(&event, 0, sizeof(event));
1366 event.event = IW_CM_EVENT_CONNECT_REQUEST;
1367 memcpy(&event.local_addr, &ep->com.local_addr,
1368 sizeof(ep->com.local_addr));
1369 memcpy(&event.remote_addr, &ep->com.remote_addr,
1370 sizeof(ep->com.remote_addr));
1371 event.provider_data = ep;
1372 if (!ep->tried_with_mpa_v1) {
1373 /* this means MPA_v2 is used */
1374 event.ord = ep->ord;
1375 event.ird = ep->ird;
1376 event.private_data_len = ep->plen -
1377 sizeof(struct mpa_v2_conn_params);
1378 event.private_data = ep->mpa_pkt + sizeof(struct mpa_message) +
1379 sizeof(struct mpa_v2_conn_params);
1380 } else {
1381 /* this means MPA_v1 is used. Send max supported */
1382 event.ord = cur_max_read_depth(ep->com.dev);
1383 event.ird = cur_max_read_depth(ep->com.dev);
1384 event.private_data_len = ep->plen;
1385 event.private_data = ep->mpa_pkt + sizeof(struct mpa_message);
1386 }
1387 c4iw_get_ep(&ep->com);
1388 ret = ep->parent_ep->com.cm_id->event_handler(ep->parent_ep->com.cm_id,
1389 &event);
1390 if (ret)
1391 c4iw_put_ep(&ep->com);
1392 set_bit(CONNREQ_UPCALL, &ep->com.history);
1393 c4iw_put_ep(&ep->parent_ep->com);
1394 return ret;
1395 }
1396
established_upcall(struct c4iw_ep * ep)1397 static void established_upcall(struct c4iw_ep *ep)
1398 {
1399 struct iw_cm_event event;
1400
1401 pr_debug("ep %p tid %u\n", ep, ep->hwtid);
1402 memset(&event, 0, sizeof(event));
1403 event.event = IW_CM_EVENT_ESTABLISHED;
1404 event.ird = ep->ord;
1405 event.ord = ep->ird;
1406 if (ep->com.cm_id) {
1407 pr_debug("ep %p tid %u\n", ep, ep->hwtid);
1408 ep->com.cm_id->event_handler(ep->com.cm_id, &event);
1409 set_bit(ESTAB_UPCALL, &ep->com.history);
1410 }
1411 }
1412
update_rx_credits(struct c4iw_ep * ep,u32 credits)1413 static int update_rx_credits(struct c4iw_ep *ep, u32 credits)
1414 {
1415 struct sk_buff *skb;
1416 u32 wrlen = roundup(sizeof(struct cpl_rx_data_ack), 16);
1417 u32 credit_dack;
1418
1419 pr_debug("ep %p tid %u credits %u\n",
1420 ep, ep->hwtid, credits);
1421 skb = get_skb(NULL, wrlen, GFP_KERNEL);
1422 if (!skb) {
1423 pr_err("update_rx_credits - cannot alloc skb!\n");
1424 return 0;
1425 }
1426
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 */
1432 if (ep->rcv_win > RCV_BUFSIZ_M * 1024)
1433 credits += ep->rcv_win - RCV_BUFSIZ_M * 1024;
1434
1435 credit_dack = credits | RX_FORCE_ACK_F | RX_DACK_CHANGE_F |
1436 RX_DACK_MODE_V(dack_mode);
1437
1438 cxgb_mk_rx_data_ack(skb, wrlen, ep->hwtid, ep->ctrlq_idx,
1439 credit_dack);
1440
1441 c4iw_ofld_send(&ep->com.dev->rdev, skb);
1442 return credits;
1443 }
1444
1445 #define RELAXED_IRD_NEGOTIATION 1
1446
1447 /*
1448 * process_mpa_reply - process streaming mode MPA reply
1449 *
1450 * Returns:
1451 *
1452 * 0 upon success indicating a connect request was delivered to the ULP
1453 * or the mpa request is incomplete but valid so far.
1454 *
1455 * 1 if a failure requires the caller to close the connection.
1456 *
1457 * 2 if a failure requires the caller to abort the connection.
1458 */
process_mpa_reply(struct c4iw_ep * ep,struct sk_buff * skb)1459 static int process_mpa_reply(struct c4iw_ep *ep, struct sk_buff *skb)
1460 {
1461 struct mpa_message *mpa;
1462 struct mpa_v2_conn_params *mpa_v2_params;
1463 u16 plen;
1464 u16 resp_ird, resp_ord;
1465 u8 rtr_mismatch = 0, insuff_ird = 0;
1466 struct c4iw_qp_attributes attrs;
1467 enum c4iw_qp_attr_mask mask;
1468 int err;
1469 int disconnect = 0;
1470
1471 pr_debug("ep %p tid %u\n", ep, ep->hwtid);
1472
1473 /*
1474 * If we get more than the supported amount of private data
1475 * then we must fail this connection.
1476 */
1477 if (ep->mpa_pkt_len + skb->len > sizeof(ep->mpa_pkt)) {
1478 err = -EINVAL;
1479 goto err_stop_timer;
1480 }
1481
1482 /*
1483 * copy the new data into our accumulation buffer.
1484 */
1485 skb_copy_from_linear_data(skb, &(ep->mpa_pkt[ep->mpa_pkt_len]),
1486 skb->len);
1487 ep->mpa_pkt_len += skb->len;
1488
1489 /*
1490 * if we don't even have the mpa message, then bail.
1491 */
1492 if (ep->mpa_pkt_len < sizeof(*mpa))
1493 return 0;
1494 mpa = (struct mpa_message *) ep->mpa_pkt;
1495
1496 /* Validate MPA header. */
1497 if (mpa->revision > mpa_rev) {
1498 pr_err("%s MPA version mismatch. Local = %d, Received = %d\n",
1499 __func__, mpa_rev, mpa->revision);
1500 err = -EPROTO;
1501 goto err_stop_timer;
1502 }
1503 if (memcmp(mpa->key, MPA_KEY_REP, sizeof(mpa->key))) {
1504 err = -EPROTO;
1505 goto err_stop_timer;
1506 }
1507
1508 plen = ntohs(mpa->private_data_size);
1509
1510 /*
1511 * Fail if there's too much private data.
1512 */
1513 if (plen > MPA_MAX_PRIVATE_DATA) {
1514 err = -EPROTO;
1515 goto err_stop_timer;
1516 }
1517
1518 /*
1519 * If plen does not account for pkt size
1520 */
1521 if (ep->mpa_pkt_len > (sizeof(*mpa) + plen)) {
1522 err = -EPROTO;
1523 goto err_stop_timer;
1524 }
1525
1526 ep->plen = (u8) plen;
1527
1528 /*
1529 * If we don't have all the pdata yet, then bail.
1530 * We'll continue process when more data arrives.
1531 */
1532 if (ep->mpa_pkt_len < (sizeof(*mpa) + plen))
1533 return 0;
1534
1535 if (mpa->flags & MPA_REJECT) {
1536 err = -ECONNREFUSED;
1537 goto err_stop_timer;
1538 }
1539
1540 /*
1541 * Stop mpa timer. If it expired, then
1542 * we ignore the MPA reply. process_timeout()
1543 * will abort the connection.
1544 */
1545 if (stop_ep_timer(ep))
1546 return 0;
1547
1548 /*
1549 * If we get here we have accumulated the entire mpa
1550 * start reply message including private data. And
1551 * the MPA header is valid.
1552 */
1553 __state_set(&ep->com, FPDU_MODE);
1554 ep->mpa_attr.crc_enabled = (mpa->flags & MPA_CRC) | crc_enabled ? 1 : 0;
1555 ep->mpa_attr.xmit_marker_enabled = mpa->flags & MPA_MARKERS ? 1 : 0;
1556 ep->mpa_attr.version = mpa->revision;
1557 ep->mpa_attr.p2p_type = FW_RI_INIT_P2PTYPE_DISABLED;
1558
1559 if (mpa->revision == 2) {
1560 ep->mpa_attr.enhanced_rdma_conn =
1561 mpa->flags & MPA_ENHANCED_RDMA_CONN ? 1 : 0;
1562 if (ep->mpa_attr.enhanced_rdma_conn) {
1563 mpa_v2_params = (struct mpa_v2_conn_params *)
1564 (ep->mpa_pkt + sizeof(*mpa));
1565 resp_ird = ntohs(mpa_v2_params->ird) &
1566 MPA_V2_IRD_ORD_MASK;
1567 resp_ord = ntohs(mpa_v2_params->ord) &
1568 MPA_V2_IRD_ORD_MASK;
1569 pr_debug("responder ird %u ord %u ep ird %u ord %u\n",
1570 resp_ird, resp_ord, ep->ird, ep->ord);
1571
1572 /*
1573 * This is a double-check. Ideally, below checks are
1574 * not required since ird/ord stuff has been taken
1575 * care of in c4iw_accept_cr
1576 */
1577 if (ep->ird < resp_ord) {
1578 if (RELAXED_IRD_NEGOTIATION && resp_ord <=
1579 ep->com.dev->rdev.lldi.max_ordird_qp)
1580 ep->ird = resp_ord;
1581 else
1582 insuff_ird = 1;
1583 } else if (ep->ird > resp_ord) {
1584 ep->ird = resp_ord;
1585 }
1586 if (ep->ord > resp_ird) {
1587 if (RELAXED_IRD_NEGOTIATION)
1588 ep->ord = resp_ird;
1589 else
1590 insuff_ird = 1;
1591 }
1592 if (insuff_ird) {
1593 err = -ENOMEM;
1594 ep->ird = resp_ord;
1595 ep->ord = resp_ird;
1596 }
1597
1598 if (ntohs(mpa_v2_params->ird) &
1599 MPA_V2_PEER2PEER_MODEL) {
1600 if (ntohs(mpa_v2_params->ord) &
1601 MPA_V2_RDMA_WRITE_RTR)
1602 ep->mpa_attr.p2p_type =
1603 FW_RI_INIT_P2PTYPE_RDMA_WRITE;
1604 else if (ntohs(mpa_v2_params->ord) &
1605 MPA_V2_RDMA_READ_RTR)
1606 ep->mpa_attr.p2p_type =
1607 FW_RI_INIT_P2PTYPE_READ_REQ;
1608 }
1609 }
1610 } else if (mpa->revision == 1)
1611 if (peer2peer)
1612 ep->mpa_attr.p2p_type = p2p_type;
1613
1614 pr_debug("crc_enabled=%d, recv_marker_enabled=%d, xmit_marker_enabled=%d, version=%d p2p_type=%d local-p2p_type = %d\n",
1615 ep->mpa_attr.crc_enabled,
1616 ep->mpa_attr.recv_marker_enabled,
1617 ep->mpa_attr.xmit_marker_enabled, ep->mpa_attr.version,
1618 ep->mpa_attr.p2p_type, p2p_type);
1619
1620 /*
1621 * If responder's RTR does not match with that of initiator, assign
1622 * FW_RI_INIT_P2PTYPE_DISABLED in mpa attributes so that RTR is not
1623 * generated when moving QP to RTS state.
1624 * A TERM message will be sent after QP has moved to RTS state
1625 */
1626 if ((ep->mpa_attr.version == 2) && peer2peer &&
1627 (ep->mpa_attr.p2p_type != p2p_type)) {
1628 ep->mpa_attr.p2p_type = FW_RI_INIT_P2PTYPE_DISABLED;
1629 rtr_mismatch = 1;
1630 }
1631
1632 attrs.mpa_attr = ep->mpa_attr;
1633 attrs.max_ird = ep->ird;
1634 attrs.max_ord = ep->ord;
1635 attrs.llp_stream_handle = ep;
1636 attrs.next_state = C4IW_QP_STATE_RTS;
1637
1638 mask = C4IW_QP_ATTR_NEXT_STATE |
1639 C4IW_QP_ATTR_LLP_STREAM_HANDLE | C4IW_QP_ATTR_MPA_ATTR |
1640 C4IW_QP_ATTR_MAX_IRD | C4IW_QP_ATTR_MAX_ORD;
1641
1642 /* bind QP and TID with INIT_WR */
1643 err = c4iw_modify_qp(ep->com.qp->rhp,
1644 ep->com.qp, mask, &attrs, 1);
1645 if (err)
1646 goto err;
1647
1648 /*
1649 * If responder's RTR requirement did not match with what initiator
1650 * supports, generate TERM message
1651 */
1652 if (rtr_mismatch) {
1653 pr_err("%s: RTR mismatch, sending TERM\n", __func__);
1654 attrs.layer_etype = LAYER_MPA | DDP_LLP;
1655 attrs.ecode = MPA_NOMATCH_RTR;
1656 attrs.next_state = C4IW_QP_STATE_TERMINATE;
1657 attrs.send_term = 1;
1658 err = c4iw_modify_qp(ep->com.qp->rhp, ep->com.qp,
1659 C4IW_QP_ATTR_NEXT_STATE, &attrs, 1);
1660 err = -ENOMEM;
1661 disconnect = 1;
1662 goto out;
1663 }
1664
1665 /*
1666 * Generate TERM if initiator IRD is not sufficient for responder
1667 * provided ORD. Currently, we do the same behaviour even when
1668 * responder provided IRD is also not sufficient as regards to
1669 * initiator ORD.
1670 */
1671 if (insuff_ird) {
1672 pr_err("%s: Insufficient IRD, sending TERM\n", __func__);
1673 attrs.layer_etype = LAYER_MPA | DDP_LLP;
1674 attrs.ecode = MPA_INSUFF_IRD;
1675 attrs.next_state = C4IW_QP_STATE_TERMINATE;
1676 attrs.send_term = 1;
1677 err = c4iw_modify_qp(ep->com.qp->rhp, ep->com.qp,
1678 C4IW_QP_ATTR_NEXT_STATE, &attrs, 1);
1679 err = -ENOMEM;
1680 disconnect = 1;
1681 goto out;
1682 }
1683 goto out;
1684 err_stop_timer:
1685 stop_ep_timer(ep);
1686 err:
1687 disconnect = 2;
1688 out:
1689 connect_reply_upcall(ep, err);
1690 return disconnect;
1691 }
1692
1693 /*
1694 * process_mpa_request - process streaming mode MPA request
1695 *
1696 * Returns:
1697 *
1698 * 0 upon success indicating a connect request was delivered to the ULP
1699 * or the mpa request is incomplete but valid so far.
1700 *
1701 * 1 if a failure requires the caller to close the connection.
1702 *
1703 * 2 if a failure requires the caller to abort the connection.
1704 */
process_mpa_request(struct c4iw_ep * ep,struct sk_buff * skb)1705 static int process_mpa_request(struct c4iw_ep *ep, struct sk_buff *skb)
1706 {
1707 struct mpa_message *mpa;
1708 struct mpa_v2_conn_params *mpa_v2_params;
1709 u16 plen;
1710
1711 pr_debug("ep %p tid %u\n", ep, ep->hwtid);
1712
1713 /*
1714 * If we get more than the supported amount of private data
1715 * then we must fail this connection.
1716 */
1717 if (ep->mpa_pkt_len + skb->len > sizeof(ep->mpa_pkt))
1718 goto err_stop_timer;
1719
1720 pr_debug("enter (%s line %u)\n", __FILE__, __LINE__);
1721
1722 /*
1723 * Copy the new data into our accumulation buffer.
1724 */
1725 skb_copy_from_linear_data(skb, &(ep->mpa_pkt[ep->mpa_pkt_len]),
1726 skb->len);
1727 ep->mpa_pkt_len += skb->len;
1728
1729 /*
1730 * If we don't even have the mpa message, then bail.
1731 * We'll continue process when more data arrives.
1732 */
1733 if (ep->mpa_pkt_len < sizeof(*mpa))
1734 return 0;
1735
1736 pr_debug("enter (%s line %u)\n", __FILE__, __LINE__);
1737 mpa = (struct mpa_message *) ep->mpa_pkt;
1738
1739 /*
1740 * Validate MPA Header.
1741 */
1742 if (mpa->revision > mpa_rev) {
1743 pr_err("%s MPA version mismatch. Local = %d, Received = %d\n",
1744 __func__, mpa_rev, mpa->revision);
1745 goto err_stop_timer;
1746 }
1747
1748 if (memcmp(mpa->key, MPA_KEY_REQ, sizeof(mpa->key)))
1749 goto err_stop_timer;
1750
1751 plen = ntohs(mpa->private_data_size);
1752
1753 /*
1754 * Fail if there's too much private data.
1755 */
1756 if (plen > MPA_MAX_PRIVATE_DATA)
1757 goto err_stop_timer;
1758
1759 /*
1760 * If plen does not account for pkt size
1761 */
1762 if (ep->mpa_pkt_len > (sizeof(*mpa) + plen))
1763 goto err_stop_timer;
1764 ep->plen = (u8) plen;
1765
1766 /*
1767 * If we don't have all the pdata yet, then bail.
1768 */
1769 if (ep->mpa_pkt_len < (sizeof(*mpa) + plen))
1770 return 0;
1771
1772 /*
1773 * If we get here we have accumulated the entire mpa
1774 * start reply message including private data.
1775 */
1776 ep->mpa_attr.initiator = 0;
1777 ep->mpa_attr.crc_enabled = (mpa->flags & MPA_CRC) | crc_enabled ? 1 : 0;
1778 ep->mpa_attr.recv_marker_enabled = markers_enabled;
1779 ep->mpa_attr.xmit_marker_enabled = mpa->flags & MPA_MARKERS ? 1 : 0;
1780 ep->mpa_attr.version = mpa->revision;
1781 if (mpa->revision == 1)
1782 ep->tried_with_mpa_v1 = 1;
1783 ep->mpa_attr.p2p_type = FW_RI_INIT_P2PTYPE_DISABLED;
1784
1785 if (mpa->revision == 2) {
1786 ep->mpa_attr.enhanced_rdma_conn =
1787 mpa->flags & MPA_ENHANCED_RDMA_CONN ? 1 : 0;
1788 if (ep->mpa_attr.enhanced_rdma_conn) {
1789 mpa_v2_params = (struct mpa_v2_conn_params *)
1790 (ep->mpa_pkt + sizeof(*mpa));
1791 ep->ird = ntohs(mpa_v2_params->ird) &
1792 MPA_V2_IRD_ORD_MASK;
1793 ep->ird = min_t(u32, ep->ird,
1794 cur_max_read_depth(ep->com.dev));
1795 ep->ord = ntohs(mpa_v2_params->ord) &
1796 MPA_V2_IRD_ORD_MASK;
1797 ep->ord = min_t(u32, ep->ord,
1798 cur_max_read_depth(ep->com.dev));
1799 pr_debug("initiator ird %u ord %u\n",
1800 ep->ird, ep->ord);
1801 if (ntohs(mpa_v2_params->ird) & MPA_V2_PEER2PEER_MODEL)
1802 if (peer2peer) {
1803 if (ntohs(mpa_v2_params->ord) &
1804 MPA_V2_RDMA_WRITE_RTR)
1805 ep->mpa_attr.p2p_type =
1806 FW_RI_INIT_P2PTYPE_RDMA_WRITE;
1807 else if (ntohs(mpa_v2_params->ord) &
1808 MPA_V2_RDMA_READ_RTR)
1809 ep->mpa_attr.p2p_type =
1810 FW_RI_INIT_P2PTYPE_READ_REQ;
1811 }
1812 }
1813 } else if (mpa->revision == 1)
1814 if (peer2peer)
1815 ep->mpa_attr.p2p_type = p2p_type;
1816
1817 pr_debug("crc_enabled=%d, recv_marker_enabled=%d, xmit_marker_enabled=%d, version=%d p2p_type=%d\n",
1818 ep->mpa_attr.crc_enabled, ep->mpa_attr.recv_marker_enabled,
1819 ep->mpa_attr.xmit_marker_enabled, ep->mpa_attr.version,
1820 ep->mpa_attr.p2p_type);
1821
1822 __state_set(&ep->com, MPA_REQ_RCVD);
1823
1824 /* drive upcall */
1825 mutex_lock_nested(&ep->parent_ep->com.mutex, SINGLE_DEPTH_NESTING);
1826 if (ep->parent_ep->com.state != DEAD) {
1827 if (connect_request_upcall(ep))
1828 goto err_unlock_parent;
1829 } else {
1830 goto err_unlock_parent;
1831 }
1832 mutex_unlock(&ep->parent_ep->com.mutex);
1833 return 0;
1834
1835 err_unlock_parent:
1836 mutex_unlock(&ep->parent_ep->com.mutex);
1837 goto err_out;
1838 err_stop_timer:
1839 (void)stop_ep_timer(ep);
1840 err_out:
1841 return 2;
1842 }
1843
rx_data(struct c4iw_dev * dev,struct sk_buff * skb)1844 static int rx_data(struct c4iw_dev *dev, struct sk_buff *skb)
1845 {
1846 struct c4iw_ep *ep;
1847 struct cpl_rx_data *hdr = cplhdr(skb);
1848 unsigned int dlen = ntohs(hdr->len);
1849 unsigned int tid = GET_TID(hdr);
1850 __u8 status = hdr->status;
1851 int disconnect = 0;
1852
1853 ep = get_ep_from_tid(dev, tid);
1854 if (!ep)
1855 return 0;
1856 pr_debug("ep %p tid %u dlen %u\n", ep, ep->hwtid, dlen);
1857 skb_pull(skb, sizeof(*hdr));
1858 skb_trim(skb, dlen);
1859 mutex_lock(&ep->com.mutex);
1860
1861 switch (ep->com.state) {
1862 case MPA_REQ_SENT:
1863 update_rx_credits(ep, dlen);
1864 ep->rcv_seq += dlen;
1865 disconnect = process_mpa_reply(ep, skb);
1866 break;
1867 case MPA_REQ_WAIT:
1868 update_rx_credits(ep, dlen);
1869 ep->rcv_seq += dlen;
1870 disconnect = process_mpa_request(ep, skb);
1871 break;
1872 case FPDU_MODE: {
1873 struct c4iw_qp_attributes attrs;
1874
1875 update_rx_credits(ep, dlen);
1876 if (status)
1877 pr_err("%s Unexpected streaming data." \
1878 " qpid %u ep %p state %d tid %u status %d\n",
1879 __func__, ep->com.qp->wq.sq.qid, ep,
1880 ep->com.state, ep->hwtid, status);
1881 attrs.next_state = C4IW_QP_STATE_TERMINATE;
1882 c4iw_modify_qp(ep->com.qp->rhp, ep->com.qp,
1883 C4IW_QP_ATTR_NEXT_STATE, &attrs, 1);
1884 disconnect = 1;
1885 break;
1886 }
1887 default:
1888 break;
1889 }
1890 mutex_unlock(&ep->com.mutex);
1891 if (disconnect)
1892 c4iw_ep_disconnect(ep, disconnect == 2, GFP_KERNEL);
1893 c4iw_put_ep(&ep->com);
1894 return 0;
1895 }
1896
complete_cached_srq_buffers(struct c4iw_ep * ep,u32 srqidx)1897 static void complete_cached_srq_buffers(struct c4iw_ep *ep, u32 srqidx)
1898 {
1899 enum chip_type adapter_type;
1900
1901 adapter_type = ep->com.dev->rdev.lldi.adapter_type;
1902
1903 /*
1904 * If this TCB had a srq buffer cached, then we must complete
1905 * it. For user mode, that means saving the srqidx in the
1906 * user/kernel status page for this qp. For kernel mode, just
1907 * synthesize the CQE now.
1908 */
1909 if (CHELSIO_CHIP_VERSION(adapter_type) > CHELSIO_T5 && srqidx) {
1910 if (ep->com.qp->ibqp.uobject)
1911 t4_set_wq_in_error(&ep->com.qp->wq, srqidx);
1912 else
1913 c4iw_flush_srqidx(ep->com.qp, srqidx);
1914 }
1915 }
1916
abort_rpl(struct c4iw_dev * dev,struct sk_buff * skb)1917 static int abort_rpl(struct c4iw_dev *dev, struct sk_buff *skb)
1918 {
1919 u32 srqidx;
1920 struct c4iw_ep *ep;
1921 struct cpl_abort_rpl_rss6 *rpl = cplhdr(skb);
1922 int release = 0;
1923 unsigned int tid = GET_TID(rpl);
1924
1925 ep = get_ep_from_tid(dev, tid);
1926 if (!ep) {
1927 pr_warn("Abort rpl to freed endpoint\n");
1928 return 0;
1929 }
1930
1931 if (ep->com.qp && ep->com.qp->srq) {
1932 srqidx = ABORT_RSS_SRQIDX_G(be32_to_cpu(rpl->srqidx_status));
1933 complete_cached_srq_buffers(ep, srqidx ? srqidx : ep->srqe_idx);
1934 }
1935
1936 pr_debug("ep %p tid %u\n", ep, ep->hwtid);
1937 mutex_lock(&ep->com.mutex);
1938 switch (ep->com.state) {
1939 case ABORTING:
1940 c4iw_wake_up_noref(ep->com.wr_waitp, -ECONNRESET);
1941 __state_set(&ep->com, DEAD);
1942 release = 1;
1943 break;
1944 default:
1945 pr_err("%s ep %p state %d\n", __func__, ep, ep->com.state);
1946 break;
1947 }
1948 mutex_unlock(&ep->com.mutex);
1949
1950 if (release) {
1951 close_complete_upcall(ep, -ECONNRESET);
1952 release_ep_resources(ep);
1953 }
1954 c4iw_put_ep(&ep->com);
1955 return 0;
1956 }
1957
send_fw_act_open_req(struct c4iw_ep * ep,unsigned int atid)1958 static int send_fw_act_open_req(struct c4iw_ep *ep, unsigned int atid)
1959 {
1960 struct sk_buff *skb;
1961 struct fw_ofld_connection_wr *req;
1962 unsigned int mtu_idx;
1963 u32 wscale;
1964 struct sockaddr_in *sin;
1965 int win;
1966
1967 skb = get_skb(NULL, sizeof(*req), GFP_KERNEL);
1968 if (!skb)
1969 return -ENOMEM;
1970
1971 req = __skb_put_zero(skb, sizeof(*req));
1972 req->op_compl = htonl(WR_OP_V(FW_OFLD_CONNECTION_WR));
1973 req->len16_pkd = htonl(FW_WR_LEN16_V(DIV_ROUND_UP(sizeof(*req), 16)));
1974 req->le.filter = cpu_to_be32(cxgb4_select_ntuple(
1975 ep->com.dev->rdev.lldi.ports[0],
1976 ep->l2t));
1977 sin = (struct sockaddr_in *)&ep->com.local_addr;
1978 req->le.lport = sin->sin_port;
1979 req->le.u.ipv4.lip = sin->sin_addr.s_addr;
1980 sin = (struct sockaddr_in *)&ep->com.remote_addr;
1981 req->le.pport = sin->sin_port;
1982 req->le.u.ipv4.pip = sin->sin_addr.s_addr;
1983 req->tcb.t_state_to_astid =
1984 htonl(FW_OFLD_CONNECTION_WR_T_STATE_V(TCP_SYN_SENT) |
1985 FW_OFLD_CONNECTION_WR_ASTID_V(atid));
1986 req->tcb.cplrxdataack_cplpassacceptrpl =
1987 htons(FW_OFLD_CONNECTION_WR_CPLRXDATAACK_F);
1988 req->tcb.tx_max = (__force __be32) jiffies;
1989 req->tcb.rcv_adv = htons(1);
1990 cxgb_best_mtu(ep->com.dev->rdev.lldi.mtus, ep->mtu, &mtu_idx,
1991 enable_tcp_timestamps,
1992 (ep->com.remote_addr.ss_family == AF_INET) ? 0 : 1);
1993 wscale = cxgb_compute_wscale(rcv_win);
1994
1995 /*
1996 * Specify the largest window that will fit in opt0. The
1997 * remainder will be specified in the rx_data_ack.
1998 */
1999 win = ep->rcv_win >> 10;
2000 if (win > RCV_BUFSIZ_M)
2001 win = RCV_BUFSIZ_M;
2002
2003 req->tcb.opt0 = (__force __be64) (TCAM_BYPASS_F |
2004 (nocong ? NO_CONG_F : 0) |
2005 KEEP_ALIVE_F |
2006 DELACK_F |
2007 WND_SCALE_V(wscale) |
2008 MSS_IDX_V(mtu_idx) |
2009 L2T_IDX_V(ep->l2t->idx) |
2010 TX_CHAN_V(ep->tx_chan) |
2011 SMAC_SEL_V(ep->smac_idx) |
2012 DSCP_V(ep->tos >> 2) |
2013 ULP_MODE_V(ULP_MODE_TCPDDP) |
2014 RCV_BUFSIZ_V(win));
2015 req->tcb.opt2 = (__force __be32) (PACE_V(1) |
2016 TX_QUEUE_V(ep->com.dev->rdev.lldi.tx_modq[ep->tx_chan]) |
2017 RX_CHANNEL_V(0) |
2018 CCTRL_ECN_V(enable_ecn) |
2019 RSS_QUEUE_VALID_F | RSS_QUEUE_V(ep->rss_qid));
2020 if (enable_tcp_timestamps)
2021 req->tcb.opt2 |= (__force __be32)TSTAMPS_EN_F;
2022 if (enable_tcp_sack)
2023 req->tcb.opt2 |= (__force __be32)SACK_EN_F;
2024 if (wscale && enable_tcp_window_scaling)
2025 req->tcb.opt2 |= (__force __be32)WND_SCALE_EN_F;
2026 req->tcb.opt0 = cpu_to_be64((__force u64)req->tcb.opt0);
2027 req->tcb.opt2 = cpu_to_be32((__force u32)req->tcb.opt2);
2028 set_wr_txq(skb, CPL_PRIORITY_CONTROL, ep->ctrlq_idx);
2029 set_bit(ACT_OFLD_CONN, &ep->com.history);
2030 return c4iw_l2t_send(&ep->com.dev->rdev, skb, ep->l2t);
2031 }
2032
2033 /*
2034 * Some of the error codes above implicitly indicate that there is no TID
2035 * allocated with the result of an ACT_OPEN. We use this predicate to make
2036 * that explicit.
2037 */
act_open_has_tid(int status)2038 static inline int act_open_has_tid(int status)
2039 {
2040 return (status != CPL_ERR_TCAM_PARITY &&
2041 status != CPL_ERR_TCAM_MISS &&
2042 status != CPL_ERR_TCAM_FULL &&
2043 status != CPL_ERR_CONN_EXIST_SYNRECV &&
2044 status != CPL_ERR_CONN_EXIST);
2045 }
2046
neg_adv_str(unsigned int status)2047 static char *neg_adv_str(unsigned int status)
2048 {
2049 switch (status) {
2050 case CPL_ERR_RTX_NEG_ADVICE:
2051 return "Retransmit timeout";
2052 case CPL_ERR_PERSIST_NEG_ADVICE:
2053 return "Persist timeout";
2054 case CPL_ERR_KEEPALV_NEG_ADVICE:
2055 return "Keepalive timeout";
2056 default:
2057 return "Unknown";
2058 }
2059 }
2060
set_tcp_window(struct c4iw_ep * ep,struct port_info * pi)2061 static void set_tcp_window(struct c4iw_ep *ep, struct port_info *pi)
2062 {
2063 ep->snd_win = snd_win;
2064 ep->rcv_win = rcv_win;
2065 pr_debug("snd_win %d rcv_win %d\n",
2066 ep->snd_win, ep->rcv_win);
2067 }
2068
2069 #define ACT_OPEN_RETRY_COUNT 2
2070
import_ep(struct c4iw_ep * ep,int iptype,__u8 * peer_ip,struct dst_entry * dst,struct c4iw_dev * cdev,bool clear_mpa_v1,enum chip_type adapter_type,u8 tos)2071 static int import_ep(struct c4iw_ep *ep, int iptype, __u8 *peer_ip,
2072 struct dst_entry *dst, struct c4iw_dev *cdev,
2073 bool clear_mpa_v1, enum chip_type adapter_type, u8 tos)
2074 {
2075 struct neighbour *n;
2076 int err, step;
2077 struct net_device *pdev;
2078
2079 n = dst_neigh_lookup(dst, peer_ip);
2080 if (!n)
2081 return -ENODEV;
2082
2083 rcu_read_lock();
2084 err = -ENOMEM;
2085 if (n->dev->flags & IFF_LOOPBACK) {
2086 if (iptype == 4)
2087 pdev = ip_dev_find(&init_net, *(__be32 *)peer_ip);
2088 else if (IS_ENABLED(CONFIG_IPV6))
2089 for_each_netdev(&init_net, pdev) {
2090 if (ipv6_chk_addr(&init_net,
2091 (struct in6_addr *)peer_ip,
2092 pdev, 1))
2093 break;
2094 }
2095 else
2096 pdev = NULL;
2097
2098 if (!pdev) {
2099 err = -ENODEV;
2100 goto out;
2101 }
2102 ep->l2t = cxgb4_l2t_get(cdev->rdev.lldi.l2t,
2103 n, pdev, rt_tos2priority(tos));
2104 if (!ep->l2t) {
2105 dev_put(pdev);
2106 goto out;
2107 }
2108 ep->mtu = pdev->mtu;
2109 ep->tx_chan = cxgb4_port_chan(pdev);
2110 ep->smac_idx = ((struct port_info *)netdev_priv(pdev))->smt_idx;
2111 step = cdev->rdev.lldi.ntxq /
2112 cdev->rdev.lldi.nchan;
2113 ep->txq_idx = cxgb4_port_idx(pdev) * step;
2114 step = cdev->rdev.lldi.nrxq /
2115 cdev->rdev.lldi.nchan;
2116 ep->ctrlq_idx = cxgb4_port_idx(pdev);
2117 ep->rss_qid = cdev->rdev.lldi.rxq_ids[
2118 cxgb4_port_idx(pdev) * step];
2119 set_tcp_window(ep, (struct port_info *)netdev_priv(pdev));
2120 dev_put(pdev);
2121 } else {
2122 pdev = get_real_dev(n->dev);
2123 ep->l2t = cxgb4_l2t_get(cdev->rdev.lldi.l2t,
2124 n, pdev, rt_tos2priority(tos));
2125 if (!ep->l2t)
2126 goto out;
2127 ep->mtu = dst_mtu(dst);
2128 ep->tx_chan = cxgb4_port_chan(pdev);
2129 ep->smac_idx = ((struct port_info *)netdev_priv(pdev))->smt_idx;
2130 step = cdev->rdev.lldi.ntxq /
2131 cdev->rdev.lldi.nchan;
2132 ep->txq_idx = cxgb4_port_idx(pdev) * step;
2133 ep->ctrlq_idx = cxgb4_port_idx(pdev);
2134 step = cdev->rdev.lldi.nrxq /
2135 cdev->rdev.lldi.nchan;
2136 ep->rss_qid = cdev->rdev.lldi.rxq_ids[
2137 cxgb4_port_idx(pdev) * step];
2138 set_tcp_window(ep, (struct port_info *)netdev_priv(pdev));
2139
2140 if (clear_mpa_v1) {
2141 ep->retry_with_mpa_v1 = 0;
2142 ep->tried_with_mpa_v1 = 0;
2143 }
2144 }
2145 err = 0;
2146 out:
2147 rcu_read_unlock();
2148
2149 neigh_release(n);
2150
2151 return err;
2152 }
2153
c4iw_reconnect(struct c4iw_ep * ep)2154 static int c4iw_reconnect(struct c4iw_ep *ep)
2155 {
2156 int err = 0;
2157 int size = 0;
2158 struct sockaddr_in *laddr = (struct sockaddr_in *)
2159 &ep->com.cm_id->m_local_addr;
2160 struct sockaddr_in *raddr = (struct sockaddr_in *)
2161 &ep->com.cm_id->m_remote_addr;
2162 struct sockaddr_in6 *laddr6 = (struct sockaddr_in6 *)
2163 &ep->com.cm_id->m_local_addr;
2164 struct sockaddr_in6 *raddr6 = (struct sockaddr_in6 *)
2165 &ep->com.cm_id->m_remote_addr;
2166 int iptype;
2167 __u8 *ra;
2168
2169 pr_debug("qp %p cm_id %p\n", ep->com.qp, ep->com.cm_id);
2170 c4iw_init_wr_wait(ep->com.wr_waitp);
2171
2172 /* When MPA revision is different on nodes, the node with MPA_rev=2
2173 * tries to reconnect with MPA_rev 1 for the same EP through
2174 * c4iw_reconnect(), where the same EP is assigned with new tid for
2175 * further connection establishment. As we are using the same EP pointer
2176 * for reconnect, few skbs are used during the previous c4iw_connect(),
2177 * which leaves the EP with inadequate skbs for further
2178 * c4iw_reconnect(), Further causing a crash due to an empty
2179 * skb_list() during peer_abort(). Allocate skbs which is already used.
2180 */
2181 size = (CN_MAX_CON_BUF - skb_queue_len(&ep->com.ep_skb_list));
2182 if (alloc_ep_skb_list(&ep->com.ep_skb_list, size)) {
2183 err = -ENOMEM;
2184 goto fail1;
2185 }
2186
2187 /*
2188 * Allocate an active TID to initiate a TCP connection.
2189 */
2190 ep->atid = cxgb4_alloc_atid(ep->com.dev->rdev.lldi.tids, ep);
2191 if (ep->atid == -1) {
2192 pr_err("%s - cannot alloc atid\n", __func__);
2193 err = -ENOMEM;
2194 goto fail2;
2195 }
2196 err = xa_insert_irq(&ep->com.dev->atids, ep->atid, ep, GFP_KERNEL);
2197 if (err)
2198 goto fail2a;
2199
2200 /* find a route */
2201 if (ep->com.cm_id->m_local_addr.ss_family == AF_INET) {
2202 ep->dst = cxgb_find_route(&ep->com.dev->rdev.lldi, get_real_dev,
2203 laddr->sin_addr.s_addr,
2204 raddr->sin_addr.s_addr,
2205 laddr->sin_port,
2206 raddr->sin_port, ep->com.cm_id->tos);
2207 iptype = 4;
2208 ra = (__u8 *)&raddr->sin_addr;
2209 } else {
2210 ep->dst = cxgb_find_route6(&ep->com.dev->rdev.lldi,
2211 get_real_dev,
2212 laddr6->sin6_addr.s6_addr,
2213 raddr6->sin6_addr.s6_addr,
2214 laddr6->sin6_port,
2215 raddr6->sin6_port,
2216 ep->com.cm_id->tos,
2217 raddr6->sin6_scope_id);
2218 iptype = 6;
2219 ra = (__u8 *)&raddr6->sin6_addr;
2220 }
2221 if (!ep->dst) {
2222 pr_err("%s - cannot find route\n", __func__);
2223 err = -EHOSTUNREACH;
2224 goto fail3;
2225 }
2226 err = import_ep(ep, iptype, ra, ep->dst, ep->com.dev, false,
2227 ep->com.dev->rdev.lldi.adapter_type,
2228 ep->com.cm_id->tos);
2229 if (err) {
2230 pr_err("%s - cannot alloc l2e\n", __func__);
2231 goto fail4;
2232 }
2233
2234 pr_debug("txq_idx %u tx_chan %u smac_idx %u rss_qid %u l2t_idx %u\n",
2235 ep->txq_idx, ep->tx_chan, ep->smac_idx, ep->rss_qid,
2236 ep->l2t->idx);
2237
2238 state_set(&ep->com, CONNECTING);
2239 ep->tos = ep->com.cm_id->tos;
2240
2241 /* send connect request to rnic */
2242 err = send_connect(ep);
2243 if (!err)
2244 goto out;
2245
2246 cxgb4_l2t_release(ep->l2t);
2247 fail4:
2248 dst_release(ep->dst);
2249 fail3:
2250 xa_erase_irq(&ep->com.dev->atids, ep->atid);
2251 fail2a:
2252 cxgb4_free_atid(ep->com.dev->rdev.lldi.tids, ep->atid);
2253 fail2:
2254 /*
2255 * remember to send notification to upper layer.
2256 * We are in here so the upper layer is not aware that this is
2257 * re-connect attempt and so, upper layer is still waiting for
2258 * response of 1st connect request.
2259 */
2260 connect_reply_upcall(ep, -ECONNRESET);
2261 fail1:
2262 c4iw_put_ep(&ep->com);
2263 out:
2264 return err;
2265 }
2266
act_open_rpl(struct c4iw_dev * dev,struct sk_buff * skb)2267 static int act_open_rpl(struct c4iw_dev *dev, struct sk_buff *skb)
2268 {
2269 struct c4iw_ep *ep;
2270 struct cpl_act_open_rpl *rpl = cplhdr(skb);
2271 unsigned int atid = TID_TID_G(AOPEN_ATID_G(
2272 ntohl(rpl->atid_status)));
2273 struct tid_info *t = dev->rdev.lldi.tids;
2274 int status = AOPEN_STATUS_G(ntohl(rpl->atid_status));
2275 struct sockaddr_in *la;
2276 struct sockaddr_in *ra;
2277 struct sockaddr_in6 *la6;
2278 struct sockaddr_in6 *ra6;
2279 int ret = 0;
2280
2281 ep = lookup_atid(t, atid);
2282 la = (struct sockaddr_in *)&ep->com.local_addr;
2283 ra = (struct sockaddr_in *)&ep->com.remote_addr;
2284 la6 = (struct sockaddr_in6 *)&ep->com.local_addr;
2285 ra6 = (struct sockaddr_in6 *)&ep->com.remote_addr;
2286
2287 pr_debug("ep %p atid %u status %u errno %d\n", ep, atid,
2288 status, status2errno(status));
2289
2290 if (cxgb_is_neg_adv(status)) {
2291 pr_debug("Connection problems for atid %u status %u (%s)\n",
2292 atid, status, neg_adv_str(status));
2293 ep->stats.connect_neg_adv++;
2294 mutex_lock(&dev->rdev.stats.lock);
2295 dev->rdev.stats.neg_adv++;
2296 mutex_unlock(&dev->rdev.stats.lock);
2297 return 0;
2298 }
2299
2300 set_bit(ACT_OPEN_RPL, &ep->com.history);
2301
2302 /*
2303 * Log interesting failures.
2304 */
2305 switch (status) {
2306 case CPL_ERR_CONN_RESET:
2307 case CPL_ERR_CONN_TIMEDOUT:
2308 break;
2309 case CPL_ERR_TCAM_FULL:
2310 mutex_lock(&dev->rdev.stats.lock);
2311 dev->rdev.stats.tcam_full++;
2312 mutex_unlock(&dev->rdev.stats.lock);
2313 if (ep->com.local_addr.ss_family == AF_INET &&
2314 dev->rdev.lldi.enable_fw_ofld_conn) {
2315 ret = send_fw_act_open_req(ep, TID_TID_G(AOPEN_ATID_G(
2316 ntohl(rpl->atid_status))));
2317 if (ret)
2318 goto fail;
2319 return 0;
2320 }
2321 break;
2322 case CPL_ERR_CONN_EXIST:
2323 if (ep->retry_count++ < ACT_OPEN_RETRY_COUNT) {
2324 set_bit(ACT_RETRY_INUSE, &ep->com.history);
2325 if (ep->com.remote_addr.ss_family == AF_INET6) {
2326 struct sockaddr_in6 *sin6 =
2327 (struct sockaddr_in6 *)
2328 &ep->com.local_addr;
2329 cxgb4_clip_release(
2330 ep->com.dev->rdev.lldi.ports[0],
2331 (const u32 *)
2332 &sin6->sin6_addr.s6_addr, 1);
2333 }
2334 xa_erase_irq(&ep->com.dev->atids, atid);
2335 cxgb4_free_atid(t, atid);
2336 dst_release(ep->dst);
2337 cxgb4_l2t_release(ep->l2t);
2338 c4iw_reconnect(ep);
2339 return 0;
2340 }
2341 break;
2342 default:
2343 if (ep->com.local_addr.ss_family == AF_INET) {
2344 pr_info("Active open failure - atid %u status %u errno %d %pI4:%u->%pI4:%u\n",
2345 atid, status, status2errno(status),
2346 &la->sin_addr.s_addr, ntohs(la->sin_port),
2347 &ra->sin_addr.s_addr, ntohs(ra->sin_port));
2348 } else {
2349 pr_info("Active open failure - atid %u status %u errno %d %pI6:%u->%pI6:%u\n",
2350 atid, status, status2errno(status),
2351 la6->sin6_addr.s6_addr, ntohs(la6->sin6_port),
2352 ra6->sin6_addr.s6_addr, ntohs(ra6->sin6_port));
2353 }
2354 break;
2355 }
2356
2357 fail:
2358 connect_reply_upcall(ep, status2errno(status));
2359 state_set(&ep->com, DEAD);
2360
2361 if (ep->com.remote_addr.ss_family == AF_INET6) {
2362 struct sockaddr_in6 *sin6 =
2363 (struct sockaddr_in6 *)&ep->com.local_addr;
2364 cxgb4_clip_release(ep->com.dev->rdev.lldi.ports[0],
2365 (const u32 *)&sin6->sin6_addr.s6_addr, 1);
2366 }
2367 if (status && act_open_has_tid(status))
2368 cxgb4_remove_tid(ep->com.dev->rdev.lldi.tids, 0, GET_TID(rpl),
2369 ep->com.local_addr.ss_family);
2370
2371 xa_erase_irq(&ep->com.dev->atids, atid);
2372 cxgb4_free_atid(t, atid);
2373 dst_release(ep->dst);
2374 cxgb4_l2t_release(ep->l2t);
2375 c4iw_put_ep(&ep->com);
2376
2377 return 0;
2378 }
2379
pass_open_rpl(struct c4iw_dev * dev,struct sk_buff * skb)2380 static int pass_open_rpl(struct c4iw_dev *dev, struct sk_buff *skb)
2381 {
2382 struct cpl_pass_open_rpl *rpl = cplhdr(skb);
2383 unsigned int stid = GET_TID(rpl);
2384 struct c4iw_listen_ep *ep = get_ep_from_stid(dev, stid);
2385
2386 if (!ep) {
2387 pr_warn("%s stid %d lookup failure!\n", __func__, stid);
2388 goto out;
2389 }
2390 pr_debug("ep %p status %d error %d\n", ep,
2391 rpl->status, status2errno(rpl->status));
2392 c4iw_wake_up_noref(ep->com.wr_waitp, status2errno(rpl->status));
2393 c4iw_put_ep(&ep->com);
2394 out:
2395 return 0;
2396 }
2397
close_listsrv_rpl(struct c4iw_dev * dev,struct sk_buff * skb)2398 static int close_listsrv_rpl(struct c4iw_dev *dev, struct sk_buff *skb)
2399 {
2400 struct cpl_close_listsvr_rpl *rpl = cplhdr(skb);
2401 unsigned int stid = GET_TID(rpl);
2402 struct c4iw_listen_ep *ep = get_ep_from_stid(dev, stid);
2403
2404 if (!ep) {
2405 pr_warn("%s stid %d lookup failure!\n", __func__, stid);
2406 goto out;
2407 }
2408 pr_debug("ep %p\n", ep);
2409 c4iw_wake_up_noref(ep->com.wr_waitp, status2errno(rpl->status));
2410 c4iw_put_ep(&ep->com);
2411 out:
2412 return 0;
2413 }
2414
accept_cr(struct c4iw_ep * ep,struct sk_buff * skb,struct cpl_pass_accept_req * req)2415 static int accept_cr(struct c4iw_ep *ep, struct sk_buff *skb,
2416 struct cpl_pass_accept_req *req)
2417 {
2418 struct cpl_pass_accept_rpl *rpl;
2419 unsigned int mtu_idx;
2420 u64 opt0;
2421 u32 opt2;
2422 u32 wscale;
2423 struct cpl_t5_pass_accept_rpl *rpl5 = NULL;
2424 int win;
2425 enum chip_type adapter_type = ep->com.dev->rdev.lldi.adapter_type;
2426
2427 pr_debug("ep %p tid %u\n", ep, ep->hwtid);
2428 cxgb_best_mtu(ep->com.dev->rdev.lldi.mtus, ep->mtu, &mtu_idx,
2429 enable_tcp_timestamps && req->tcpopt.tstamp,
2430 (ep->com.remote_addr.ss_family == AF_INET) ? 0 : 1);
2431 wscale = cxgb_compute_wscale(rcv_win);
2432
2433 /*
2434 * Specify the largest window that will fit in opt0. The
2435 * remainder will be specified in the rx_data_ack.
2436 */
2437 win = ep->rcv_win >> 10;
2438 if (win > RCV_BUFSIZ_M)
2439 win = RCV_BUFSIZ_M;
2440 opt0 = (nocong ? NO_CONG_F : 0) |
2441 KEEP_ALIVE_F |
2442 DELACK_F |
2443 WND_SCALE_V(wscale) |
2444 MSS_IDX_V(mtu_idx) |
2445 L2T_IDX_V(ep->l2t->idx) |
2446 TX_CHAN_V(ep->tx_chan) |
2447 SMAC_SEL_V(ep->smac_idx) |
2448 DSCP_V(ep->tos >> 2) |
2449 ULP_MODE_V(ULP_MODE_TCPDDP) |
2450 RCV_BUFSIZ_V(win);
2451 opt2 = RX_CHANNEL_V(0) |
2452 RSS_QUEUE_VALID_F | RSS_QUEUE_V(ep->rss_qid);
2453
2454 if (enable_tcp_timestamps && req->tcpopt.tstamp)
2455 opt2 |= TSTAMPS_EN_F;
2456 if (enable_tcp_sack && req->tcpopt.sack)
2457 opt2 |= SACK_EN_F;
2458 if (wscale && enable_tcp_window_scaling)
2459 opt2 |= WND_SCALE_EN_F;
2460 if (enable_ecn) {
2461 const struct tcphdr *tcph;
2462 u32 hlen = ntohl(req->hdr_len);
2463
2464 if (CHELSIO_CHIP_VERSION(adapter_type) <= CHELSIO_T5)
2465 tcph = (const void *)(req + 1) + ETH_HDR_LEN_G(hlen) +
2466 IP_HDR_LEN_G(hlen);
2467 else
2468 tcph = (const void *)(req + 1) +
2469 T6_ETH_HDR_LEN_G(hlen) + T6_IP_HDR_LEN_G(hlen);
2470 if (tcph->ece && tcph->cwr)
2471 opt2 |= CCTRL_ECN_V(1);
2472 }
2473
2474 skb_get(skb);
2475 rpl = cplhdr(skb);
2476 if (!is_t4(adapter_type)) {
2477 skb_trim(skb, roundup(sizeof(*rpl5), 16));
2478 rpl5 = (void *)rpl;
2479 INIT_TP_WR(rpl5, ep->hwtid);
2480 } else {
2481 skb_trim(skb, sizeof(*rpl));
2482 INIT_TP_WR(rpl, ep->hwtid);
2483 }
2484 OPCODE_TID(rpl) = cpu_to_be32(MK_OPCODE_TID(CPL_PASS_ACCEPT_RPL,
2485 ep->hwtid));
2486
2487 if (CHELSIO_CHIP_VERSION(adapter_type) > CHELSIO_T4) {
2488 u32 isn = (prandom_u32() & ~7UL) - 1;
2489 opt2 |= T5_OPT_2_VALID_F;
2490 opt2 |= CONG_CNTRL_V(CONG_ALG_TAHOE);
2491 opt2 |= T5_ISS_F;
2492 rpl5 = (void *)rpl;
2493 memset(&rpl5->iss, 0, roundup(sizeof(*rpl5)-sizeof(*rpl), 16));
2494 if (peer2peer)
2495 isn += 4;
2496 rpl5->iss = cpu_to_be32(isn);
2497 pr_debug("iss %u\n", be32_to_cpu(rpl5->iss));
2498 }
2499
2500 rpl->opt0 = cpu_to_be64(opt0);
2501 rpl->opt2 = cpu_to_be32(opt2);
2502 set_wr_txq(skb, CPL_PRIORITY_SETUP, ep->ctrlq_idx);
2503 t4_set_arp_err_handler(skb, ep, pass_accept_rpl_arp_failure);
2504
2505 return c4iw_l2t_send(&ep->com.dev->rdev, skb, ep->l2t);
2506 }
2507
reject_cr(struct c4iw_dev * dev,u32 hwtid,struct sk_buff * skb)2508 static void reject_cr(struct c4iw_dev *dev, u32 hwtid, struct sk_buff *skb)
2509 {
2510 pr_debug("c4iw_dev %p tid %u\n", dev, hwtid);
2511 skb_trim(skb, sizeof(struct cpl_tid_release));
2512 release_tid(&dev->rdev, hwtid, skb);
2513 return;
2514 }
2515
pass_accept_req(struct c4iw_dev * dev,struct sk_buff * skb)2516 static int pass_accept_req(struct c4iw_dev *dev, struct sk_buff *skb)
2517 {
2518 struct c4iw_ep *child_ep = NULL, *parent_ep;
2519 struct cpl_pass_accept_req *req = cplhdr(skb);
2520 unsigned int stid = PASS_OPEN_TID_G(ntohl(req->tos_stid));
2521 struct tid_info *t = dev->rdev.lldi.tids;
2522 unsigned int hwtid = GET_TID(req);
2523 struct dst_entry *dst;
2524 __u8 local_ip[16], peer_ip[16];
2525 __be16 local_port, peer_port;
2526 struct sockaddr_in6 *sin6;
2527 int err;
2528 u16 peer_mss = ntohs(req->tcpopt.mss);
2529 int iptype;
2530 unsigned short hdrs;
2531 u8 tos;
2532
2533 parent_ep = (struct c4iw_ep *)get_ep_from_stid(dev, stid);
2534 if (!parent_ep) {
2535 pr_err("%s connect request on invalid stid %d\n",
2536 __func__, stid);
2537 goto reject;
2538 }
2539
2540 if (state_read(&parent_ep->com) != LISTEN) {
2541 pr_err("%s - listening ep not in LISTEN\n", __func__);
2542 goto reject;
2543 }
2544
2545 if (parent_ep->com.cm_id->tos_set)
2546 tos = parent_ep->com.cm_id->tos;
2547 else
2548 tos = PASS_OPEN_TOS_G(ntohl(req->tos_stid));
2549
2550 cxgb_get_4tuple(req, parent_ep->com.dev->rdev.lldi.adapter_type,
2551 &iptype, local_ip, peer_ip, &local_port, &peer_port);
2552
2553 /* Find output route */
2554 if (iptype == 4) {
2555 pr_debug("parent ep %p hwtid %u laddr %pI4 raddr %pI4 lport %d rport %d peer_mss %d\n"
2556 , parent_ep, hwtid,
2557 local_ip, peer_ip, ntohs(local_port),
2558 ntohs(peer_port), peer_mss);
2559 dst = cxgb_find_route(&dev->rdev.lldi, get_real_dev,
2560 *(__be32 *)local_ip, *(__be32 *)peer_ip,
2561 local_port, peer_port, tos);
2562 } else {
2563 pr_debug("parent ep %p hwtid %u laddr %pI6 raddr %pI6 lport %d rport %d peer_mss %d\n"
2564 , parent_ep, hwtid,
2565 local_ip, peer_ip, ntohs(local_port),
2566 ntohs(peer_port), peer_mss);
2567 dst = cxgb_find_route6(&dev->rdev.lldi, get_real_dev,
2568 local_ip, peer_ip, local_port, peer_port,
2569 tos,
2570 ((struct sockaddr_in6 *)
2571 &parent_ep->com.local_addr)->sin6_scope_id);
2572 }
2573 if (!dst) {
2574 pr_err("%s - failed to find dst entry!\n", __func__);
2575 goto reject;
2576 }
2577
2578 child_ep = alloc_ep(sizeof(*child_ep), GFP_KERNEL);
2579 if (!child_ep) {
2580 pr_err("%s - failed to allocate ep entry!\n", __func__);
2581 dst_release(dst);
2582 goto reject;
2583 }
2584
2585 err = import_ep(child_ep, iptype, peer_ip, dst, dev, false,
2586 parent_ep->com.dev->rdev.lldi.adapter_type, tos);
2587 if (err) {
2588 pr_err("%s - failed to allocate l2t entry!\n", __func__);
2589 dst_release(dst);
2590 kfree(child_ep);
2591 goto reject;
2592 }
2593
2594 hdrs = ((iptype == 4) ? sizeof(struct iphdr) : sizeof(struct ipv6hdr)) +
2595 sizeof(struct tcphdr) +
2596 ((enable_tcp_timestamps && req->tcpopt.tstamp) ? 12 : 0);
2597 if (peer_mss && child_ep->mtu > (peer_mss + hdrs))
2598 child_ep->mtu = peer_mss + hdrs;
2599
2600 skb_queue_head_init(&child_ep->com.ep_skb_list);
2601 if (alloc_ep_skb_list(&child_ep->com.ep_skb_list, CN_MAX_CON_BUF))
2602 goto fail;
2603
2604 state_set(&child_ep->com, CONNECTING);
2605 child_ep->com.dev = dev;
2606 child_ep->com.cm_id = NULL;
2607
2608 if (iptype == 4) {
2609 struct sockaddr_in *sin = (struct sockaddr_in *)
2610 &child_ep->com.local_addr;
2611
2612 sin->sin_family = AF_INET;
2613 sin->sin_port = local_port;
2614 sin->sin_addr.s_addr = *(__be32 *)local_ip;
2615
2616 sin = (struct sockaddr_in *)&child_ep->com.local_addr;
2617 sin->sin_family = AF_INET;
2618 sin->sin_port = ((struct sockaddr_in *)
2619 &parent_ep->com.local_addr)->sin_port;
2620 sin->sin_addr.s_addr = *(__be32 *)local_ip;
2621
2622 sin = (struct sockaddr_in *)&child_ep->com.remote_addr;
2623 sin->sin_family = AF_INET;
2624 sin->sin_port = peer_port;
2625 sin->sin_addr.s_addr = *(__be32 *)peer_ip;
2626 } else {
2627 sin6 = (struct sockaddr_in6 *)&child_ep->com.local_addr;
2628 sin6->sin6_family = PF_INET6;
2629 sin6->sin6_port = local_port;
2630 memcpy(sin6->sin6_addr.s6_addr, local_ip, 16);
2631
2632 sin6 = (struct sockaddr_in6 *)&child_ep->com.local_addr;
2633 sin6->sin6_family = PF_INET6;
2634 sin6->sin6_port = ((struct sockaddr_in6 *)
2635 &parent_ep->com.local_addr)->sin6_port;
2636 memcpy(sin6->sin6_addr.s6_addr, local_ip, 16);
2637
2638 sin6 = (struct sockaddr_in6 *)&child_ep->com.remote_addr;
2639 sin6->sin6_family = PF_INET6;
2640 sin6->sin6_port = peer_port;
2641 memcpy(sin6->sin6_addr.s6_addr, peer_ip, 16);
2642 }
2643
2644 c4iw_get_ep(&parent_ep->com);
2645 child_ep->parent_ep = parent_ep;
2646 child_ep->tos = tos;
2647 child_ep->dst = dst;
2648 child_ep->hwtid = hwtid;
2649
2650 pr_debug("tx_chan %u smac_idx %u rss_qid %u\n",
2651 child_ep->tx_chan, child_ep->smac_idx, child_ep->rss_qid);
2652
2653 timer_setup(&child_ep->timer, ep_timeout, 0);
2654 cxgb4_insert_tid(t, child_ep, hwtid,
2655 child_ep->com.local_addr.ss_family);
2656 insert_ep_tid(child_ep);
2657 if (accept_cr(child_ep, skb, req)) {
2658 c4iw_put_ep(&parent_ep->com);
2659 release_ep_resources(child_ep);
2660 } else {
2661 set_bit(PASS_ACCEPT_REQ, &child_ep->com.history);
2662 }
2663 if (iptype == 6) {
2664 sin6 = (struct sockaddr_in6 *)&child_ep->com.local_addr;
2665 cxgb4_clip_get(child_ep->com.dev->rdev.lldi.ports[0],
2666 (const u32 *)&sin6->sin6_addr.s6_addr, 1);
2667 }
2668 goto out;
2669 fail:
2670 c4iw_put_ep(&child_ep->com);
2671 reject:
2672 reject_cr(dev, hwtid, skb);
2673 out:
2674 if (parent_ep)
2675 c4iw_put_ep(&parent_ep->com);
2676 return 0;
2677 }
2678
pass_establish(struct c4iw_dev * dev,struct sk_buff * skb)2679 static int pass_establish(struct c4iw_dev *dev, struct sk_buff *skb)
2680 {
2681 struct c4iw_ep *ep;
2682 struct cpl_pass_establish *req = cplhdr(skb);
2683 unsigned int tid = GET_TID(req);
2684 int ret;
2685 u16 tcp_opt = ntohs(req->tcp_opt);
2686
2687 ep = get_ep_from_tid(dev, tid);
2688 if (!ep)
2689 return 0;
2690
2691 pr_debug("ep %p tid %u\n", ep, ep->hwtid);
2692 ep->snd_seq = be32_to_cpu(req->snd_isn);
2693 ep->rcv_seq = be32_to_cpu(req->rcv_isn);
2694 ep->snd_wscale = TCPOPT_SND_WSCALE_G(tcp_opt);
2695
2696 pr_debug("ep %p hwtid %u tcp_opt 0x%02x\n", ep, tid, tcp_opt);
2697
2698 set_emss(ep, tcp_opt);
2699
2700 dst_confirm(ep->dst);
2701 mutex_lock(&ep->com.mutex);
2702 ep->com.state = MPA_REQ_WAIT;
2703 start_ep_timer(ep);
2704 set_bit(PASS_ESTAB, &ep->com.history);
2705 ret = send_flowc(ep);
2706 mutex_unlock(&ep->com.mutex);
2707 if (ret)
2708 c4iw_ep_disconnect(ep, 1, GFP_KERNEL);
2709 c4iw_put_ep(&ep->com);
2710
2711 return 0;
2712 }
2713
peer_close(struct c4iw_dev * dev,struct sk_buff * skb)2714 static int peer_close(struct c4iw_dev *dev, struct sk_buff *skb)
2715 {
2716 struct cpl_peer_close *hdr = cplhdr(skb);
2717 struct c4iw_ep *ep;
2718 struct c4iw_qp_attributes attrs;
2719 int disconnect = 1;
2720 int release = 0;
2721 unsigned int tid = GET_TID(hdr);
2722 int ret;
2723
2724 ep = get_ep_from_tid(dev, tid);
2725 if (!ep)
2726 return 0;
2727
2728 pr_debug("ep %p tid %u\n", ep, ep->hwtid);
2729 dst_confirm(ep->dst);
2730
2731 set_bit(PEER_CLOSE, &ep->com.history);
2732 mutex_lock(&ep->com.mutex);
2733 switch (ep->com.state) {
2734 case MPA_REQ_WAIT:
2735 __state_set(&ep->com, CLOSING);
2736 break;
2737 case MPA_REQ_SENT:
2738 __state_set(&ep->com, CLOSING);
2739 connect_reply_upcall(ep, -ECONNRESET);
2740 break;
2741 case MPA_REQ_RCVD:
2742
2743 /*
2744 * We're gonna mark this puppy DEAD, but keep
2745 * the reference on it until the ULP accepts or
2746 * rejects the CR. Also wake up anyone waiting
2747 * in rdma connection migration (see c4iw_accept_cr()).
2748 */
2749 __state_set(&ep->com, CLOSING);
2750 pr_debug("waking up ep %p tid %u\n", ep, ep->hwtid);
2751 c4iw_wake_up_noref(ep->com.wr_waitp, -ECONNRESET);
2752 break;
2753 case MPA_REP_SENT:
2754 __state_set(&ep->com, CLOSING);
2755 pr_debug("waking up ep %p tid %u\n", ep, ep->hwtid);
2756 c4iw_wake_up_noref(ep->com.wr_waitp, -ECONNRESET);
2757 break;
2758 case FPDU_MODE:
2759 start_ep_timer(ep);
2760 __state_set(&ep->com, CLOSING);
2761 attrs.next_state = C4IW_QP_STATE_CLOSING;
2762 ret = c4iw_modify_qp(ep->com.qp->rhp, ep->com.qp,
2763 C4IW_QP_ATTR_NEXT_STATE, &attrs, 1);
2764 if (ret != -ECONNRESET) {
2765 peer_close_upcall(ep);
2766 disconnect = 1;
2767 }
2768 break;
2769 case ABORTING:
2770 disconnect = 0;
2771 break;
2772 case CLOSING:
2773 __state_set(&ep->com, MORIBUND);
2774 disconnect = 0;
2775 break;
2776 case MORIBUND:
2777 (void)stop_ep_timer(ep);
2778 if (ep->com.cm_id && ep->com.qp) {
2779 attrs.next_state = C4IW_QP_STATE_IDLE;
2780 c4iw_modify_qp(ep->com.qp->rhp, ep->com.qp,
2781 C4IW_QP_ATTR_NEXT_STATE, &attrs, 1);
2782 }
2783 close_complete_upcall(ep, 0);
2784 __state_set(&ep->com, DEAD);
2785 release = 1;
2786 disconnect = 0;
2787 break;
2788 case DEAD:
2789 disconnect = 0;
2790 break;
2791 default:
2792 WARN_ONCE(1, "Bad endpoint state %u\n", ep->com.state);
2793 }
2794 mutex_unlock(&ep->com.mutex);
2795 if (disconnect)
2796 c4iw_ep_disconnect(ep, 0, GFP_KERNEL);
2797 if (release)
2798 release_ep_resources(ep);
2799 c4iw_put_ep(&ep->com);
2800 return 0;
2801 }
2802
finish_peer_abort(struct c4iw_dev * dev,struct c4iw_ep * ep)2803 static void finish_peer_abort(struct c4iw_dev *dev, struct c4iw_ep *ep)
2804 {
2805 complete_cached_srq_buffers(ep, ep->srqe_idx);
2806 if (ep->com.cm_id && ep->com.qp) {
2807 struct c4iw_qp_attributes attrs;
2808
2809 attrs.next_state = C4IW_QP_STATE_ERROR;
2810 c4iw_modify_qp(ep->com.qp->rhp, ep->com.qp,
2811 C4IW_QP_ATTR_NEXT_STATE, &attrs, 1);
2812 }
2813 peer_abort_upcall(ep);
2814 release_ep_resources(ep);
2815 c4iw_put_ep(&ep->com);
2816 }
2817
peer_abort(struct c4iw_dev * dev,struct sk_buff * skb)2818 static int peer_abort(struct c4iw_dev *dev, struct sk_buff *skb)
2819 {
2820 struct cpl_abort_req_rss6 *req = cplhdr(skb);
2821 struct c4iw_ep *ep;
2822 struct sk_buff *rpl_skb;
2823 struct c4iw_qp_attributes attrs;
2824 int ret;
2825 int release = 0;
2826 unsigned int tid = GET_TID(req);
2827 u8 status;
2828 u32 srqidx;
2829
2830 u32 len = roundup(sizeof(struct cpl_abort_rpl), 16);
2831
2832 ep = get_ep_from_tid(dev, tid);
2833 if (!ep)
2834 return 0;
2835
2836 status = ABORT_RSS_STATUS_G(be32_to_cpu(req->srqidx_status));
2837
2838 if (cxgb_is_neg_adv(status)) {
2839 pr_debug("Negative advice on abort- tid %u status %d (%s)\n",
2840 ep->hwtid, status, neg_adv_str(status));
2841 ep->stats.abort_neg_adv++;
2842 mutex_lock(&dev->rdev.stats.lock);
2843 dev->rdev.stats.neg_adv++;
2844 mutex_unlock(&dev->rdev.stats.lock);
2845 goto deref_ep;
2846 }
2847
2848 pr_debug("ep %p tid %u state %u\n", ep, ep->hwtid,
2849 ep->com.state);
2850 set_bit(PEER_ABORT, &ep->com.history);
2851
2852 /*
2853 * Wake up any threads in rdma_init() or rdma_fini().
2854 * However, this is not needed if com state is just
2855 * MPA_REQ_SENT
2856 */
2857 if (ep->com.state != MPA_REQ_SENT)
2858 c4iw_wake_up_noref(ep->com.wr_waitp, -ECONNRESET);
2859
2860 mutex_lock(&ep->com.mutex);
2861 switch (ep->com.state) {
2862 case CONNECTING:
2863 c4iw_put_ep(&ep->parent_ep->com);
2864 break;
2865 case MPA_REQ_WAIT:
2866 (void)stop_ep_timer(ep);
2867 break;
2868 case MPA_REQ_SENT:
2869 (void)stop_ep_timer(ep);
2870 if (status != CPL_ERR_CONN_RESET || mpa_rev == 1 ||
2871 (mpa_rev == 2 && ep->tried_with_mpa_v1))
2872 connect_reply_upcall(ep, -ECONNRESET);
2873 else {
2874 /*
2875 * we just don't send notification upwards because we
2876 * want to retry with mpa_v1 without upper layers even
2877 * knowing it.
2878 *
2879 * do some housekeeping so as to re-initiate the
2880 * connection
2881 */
2882 pr_info("%s: mpa_rev=%d. Retrying with mpav1\n",
2883 __func__, mpa_rev);
2884 ep->retry_with_mpa_v1 = 1;
2885 }
2886 break;
2887 case MPA_REP_SENT:
2888 break;
2889 case MPA_REQ_RCVD:
2890 break;
2891 case MORIBUND:
2892 case CLOSING:
2893 stop_ep_timer(ep);
2894 fallthrough;
2895 case FPDU_MODE:
2896 if (ep->com.qp && ep->com.qp->srq) {
2897 srqidx = ABORT_RSS_SRQIDX_G(
2898 be32_to_cpu(req->srqidx_status));
2899 if (srqidx) {
2900 complete_cached_srq_buffers(ep, srqidx);
2901 } else {
2902 /* Hold ep ref until finish_peer_abort() */
2903 c4iw_get_ep(&ep->com);
2904 __state_set(&ep->com, ABORTING);
2905 set_bit(PEER_ABORT_IN_PROGRESS, &ep->com.flags);
2906 read_tcb(ep);
2907 break;
2908
2909 }
2910 }
2911
2912 if (ep->com.cm_id && ep->com.qp) {
2913 attrs.next_state = C4IW_QP_STATE_ERROR;
2914 ret = c4iw_modify_qp(ep->com.qp->rhp,
2915 ep->com.qp, C4IW_QP_ATTR_NEXT_STATE,
2916 &attrs, 1);
2917 if (ret)
2918 pr_err("%s - qp <- error failed!\n", __func__);
2919 }
2920 peer_abort_upcall(ep);
2921 break;
2922 case ABORTING:
2923 break;
2924 case DEAD:
2925 pr_warn("%s PEER_ABORT IN DEAD STATE!!!!\n", __func__);
2926 mutex_unlock(&ep->com.mutex);
2927 goto deref_ep;
2928 default:
2929 WARN_ONCE(1, "Bad endpoint state %u\n", ep->com.state);
2930 break;
2931 }
2932 dst_confirm(ep->dst);
2933 if (ep->com.state != ABORTING) {
2934 __state_set(&ep->com, DEAD);
2935 /* we don't release if we want to retry with mpa_v1 */
2936 if (!ep->retry_with_mpa_v1)
2937 release = 1;
2938 }
2939 mutex_unlock(&ep->com.mutex);
2940
2941 rpl_skb = skb_dequeue(&ep->com.ep_skb_list);
2942 if (WARN_ON(!rpl_skb)) {
2943 release = 1;
2944 goto out;
2945 }
2946
2947 cxgb_mk_abort_rpl(rpl_skb, len, ep->hwtid, ep->txq_idx);
2948
2949 c4iw_ofld_send(&ep->com.dev->rdev, rpl_skb);
2950 out:
2951 if (release)
2952 release_ep_resources(ep);
2953 else if (ep->retry_with_mpa_v1) {
2954 if (ep->com.remote_addr.ss_family == AF_INET6) {
2955 struct sockaddr_in6 *sin6 =
2956 (struct sockaddr_in6 *)
2957 &ep->com.local_addr;
2958 cxgb4_clip_release(
2959 ep->com.dev->rdev.lldi.ports[0],
2960 (const u32 *)&sin6->sin6_addr.s6_addr,
2961 1);
2962 }
2963 xa_erase_irq(&ep->com.dev->hwtids, ep->hwtid);
2964 cxgb4_remove_tid(ep->com.dev->rdev.lldi.tids, 0, ep->hwtid,
2965 ep->com.local_addr.ss_family);
2966 dst_release(ep->dst);
2967 cxgb4_l2t_release(ep->l2t);
2968 c4iw_reconnect(ep);
2969 }
2970
2971 deref_ep:
2972 c4iw_put_ep(&ep->com);
2973 /* Dereferencing ep, referenced in peer_abort_intr() */
2974 c4iw_put_ep(&ep->com);
2975 return 0;
2976 }
2977
close_con_rpl(struct c4iw_dev * dev,struct sk_buff * skb)2978 static int close_con_rpl(struct c4iw_dev *dev, struct sk_buff *skb)
2979 {
2980 struct c4iw_ep *ep;
2981 struct c4iw_qp_attributes attrs;
2982 struct cpl_close_con_rpl *rpl = cplhdr(skb);
2983 int release = 0;
2984 unsigned int tid = GET_TID(rpl);
2985
2986 ep = get_ep_from_tid(dev, tid);
2987 if (!ep)
2988 return 0;
2989
2990 pr_debug("ep %p tid %u\n", ep, ep->hwtid);
2991
2992 /* The cm_id may be null if we failed to connect */
2993 mutex_lock(&ep->com.mutex);
2994 set_bit(CLOSE_CON_RPL, &ep->com.history);
2995 switch (ep->com.state) {
2996 case CLOSING:
2997 __state_set(&ep->com, MORIBUND);
2998 break;
2999 case MORIBUND:
3000 (void)stop_ep_timer(ep);
3001 if ((ep->com.cm_id) && (ep->com.qp)) {
3002 attrs.next_state = C4IW_QP_STATE_IDLE;
3003 c4iw_modify_qp(ep->com.qp->rhp,
3004 ep->com.qp,
3005 C4IW_QP_ATTR_NEXT_STATE,
3006 &attrs, 1);
3007 }
3008 close_complete_upcall(ep, 0);
3009 __state_set(&ep->com, DEAD);
3010 release = 1;
3011 break;
3012 case ABORTING:
3013 case DEAD:
3014 break;
3015 default:
3016 WARN_ONCE(1, "Bad endpoint state %u\n", ep->com.state);
3017 break;
3018 }
3019 mutex_unlock(&ep->com.mutex);
3020 if (release)
3021 release_ep_resources(ep);
3022 c4iw_put_ep(&ep->com);
3023 return 0;
3024 }
3025
terminate(struct c4iw_dev * dev,struct sk_buff * skb)3026 static int terminate(struct c4iw_dev *dev, struct sk_buff *skb)
3027 {
3028 struct cpl_rdma_terminate *rpl = cplhdr(skb);
3029 unsigned int tid = GET_TID(rpl);
3030 struct c4iw_ep *ep;
3031 struct c4iw_qp_attributes attrs;
3032
3033 ep = get_ep_from_tid(dev, tid);
3034
3035 if (ep) {
3036 if (ep->com.qp) {
3037 pr_warn("TERM received tid %u qpid %u\n", tid,
3038 ep->com.qp->wq.sq.qid);
3039 attrs.next_state = C4IW_QP_STATE_TERMINATE;
3040 c4iw_modify_qp(ep->com.qp->rhp, ep->com.qp,
3041 C4IW_QP_ATTR_NEXT_STATE, &attrs, 1);
3042 }
3043
3044 /* As per draft-hilland-iwarp-verbs-v1.0, sec 6.2.3,
3045 * when entering the TERM state the RNIC MUST initiate a CLOSE.
3046 */
3047 c4iw_ep_disconnect(ep, 1, GFP_KERNEL);
3048 c4iw_put_ep(&ep->com);
3049 } else
3050 pr_warn("TERM received tid %u no ep/qp\n", tid);
3051
3052 return 0;
3053 }
3054
3055 /*
3056 * Upcall from the adapter indicating data has been transmitted.
3057 * For us its just the single MPA request or reply. We can now free
3058 * the skb holding the mpa message.
3059 */
fw4_ack(struct c4iw_dev * dev,struct sk_buff * skb)3060 static int fw4_ack(struct c4iw_dev *dev, struct sk_buff *skb)
3061 {
3062 struct c4iw_ep *ep;
3063 struct cpl_fw4_ack *hdr = cplhdr(skb);
3064 u8 credits = hdr->credits;
3065 unsigned int tid = GET_TID(hdr);
3066
3067
3068 ep = get_ep_from_tid(dev, tid);
3069 if (!ep)
3070 return 0;
3071 pr_debug("ep %p tid %u credits %u\n",
3072 ep, ep->hwtid, credits);
3073 if (credits == 0) {
3074 pr_debug("0 credit ack ep %p tid %u state %u\n",
3075 ep, ep->hwtid, state_read(&ep->com));
3076 goto out;
3077 }
3078
3079 dst_confirm(ep->dst);
3080 if (ep->mpa_skb) {
3081 pr_debug("last streaming msg ack ep %p tid %u state %u initiator %u freeing skb\n",
3082 ep, ep->hwtid, state_read(&ep->com),
3083 ep->mpa_attr.initiator ? 1 : 0);
3084 mutex_lock(&ep->com.mutex);
3085 kfree_skb(ep->mpa_skb);
3086 ep->mpa_skb = NULL;
3087 if (test_bit(STOP_MPA_TIMER, &ep->com.flags))
3088 stop_ep_timer(ep);
3089 mutex_unlock(&ep->com.mutex);
3090 }
3091 out:
3092 c4iw_put_ep(&ep->com);
3093 return 0;
3094 }
3095
c4iw_reject_cr(struct iw_cm_id * cm_id,const void * pdata,u8 pdata_len)3096 int c4iw_reject_cr(struct iw_cm_id *cm_id, const void *pdata, u8 pdata_len)
3097 {
3098 int abort;
3099 struct c4iw_ep *ep = to_ep(cm_id);
3100
3101 pr_debug("ep %p tid %u\n", ep, ep->hwtid);
3102
3103 mutex_lock(&ep->com.mutex);
3104 if (ep->com.state != MPA_REQ_RCVD) {
3105 mutex_unlock(&ep->com.mutex);
3106 c4iw_put_ep(&ep->com);
3107 return -ECONNRESET;
3108 }
3109 set_bit(ULP_REJECT, &ep->com.history);
3110 if (mpa_rev == 0)
3111 abort = 1;
3112 else
3113 abort = send_mpa_reject(ep, pdata, pdata_len);
3114 mutex_unlock(&ep->com.mutex);
3115
3116 stop_ep_timer(ep);
3117 c4iw_ep_disconnect(ep, abort != 0, GFP_KERNEL);
3118 c4iw_put_ep(&ep->com);
3119 return 0;
3120 }
3121
c4iw_accept_cr(struct iw_cm_id * cm_id,struct iw_cm_conn_param * conn_param)3122 int c4iw_accept_cr(struct iw_cm_id *cm_id, struct iw_cm_conn_param *conn_param)
3123 {
3124 int err;
3125 struct c4iw_qp_attributes attrs;
3126 enum c4iw_qp_attr_mask mask;
3127 struct c4iw_ep *ep = to_ep(cm_id);
3128 struct c4iw_dev *h = to_c4iw_dev(cm_id->device);
3129 struct c4iw_qp *qp = get_qhp(h, conn_param->qpn);
3130 int abort = 0;
3131
3132 pr_debug("ep %p tid %u\n", ep, ep->hwtid);
3133
3134 mutex_lock(&ep->com.mutex);
3135 if (ep->com.state != MPA_REQ_RCVD) {
3136 err = -ECONNRESET;
3137 goto err_out;
3138 }
3139
3140 if (!qp) {
3141 err = -EINVAL;
3142 goto err_out;
3143 }
3144
3145 set_bit(ULP_ACCEPT, &ep->com.history);
3146 if ((conn_param->ord > cur_max_read_depth(ep->com.dev)) ||
3147 (conn_param->ird > cur_max_read_depth(ep->com.dev))) {
3148 err = -EINVAL;
3149 goto err_abort;
3150 }
3151
3152 if (ep->mpa_attr.version == 2 && ep->mpa_attr.enhanced_rdma_conn) {
3153 if (conn_param->ord > ep->ird) {
3154 if (RELAXED_IRD_NEGOTIATION) {
3155 conn_param->ord = ep->ird;
3156 } else {
3157 ep->ird = conn_param->ird;
3158 ep->ord = conn_param->ord;
3159 send_mpa_reject(ep, conn_param->private_data,
3160 conn_param->private_data_len);
3161 err = -ENOMEM;
3162 goto err_abort;
3163 }
3164 }
3165 if (conn_param->ird < ep->ord) {
3166 if (RELAXED_IRD_NEGOTIATION &&
3167 ep->ord <= h->rdev.lldi.max_ordird_qp) {
3168 conn_param->ird = ep->ord;
3169 } else {
3170 err = -ENOMEM;
3171 goto err_abort;
3172 }
3173 }
3174 }
3175 ep->ird = conn_param->ird;
3176 ep->ord = conn_param->ord;
3177
3178 if (ep->mpa_attr.version == 1) {
3179 if (peer2peer && ep->ird == 0)
3180 ep->ird = 1;
3181 } else {
3182 if (peer2peer &&
3183 (ep->mpa_attr.p2p_type != FW_RI_INIT_P2PTYPE_DISABLED) &&
3184 (p2p_type == FW_RI_INIT_P2PTYPE_READ_REQ) && ep->ird == 0)
3185 ep->ird = 1;
3186 }
3187
3188 pr_debug("ird %d ord %d\n", ep->ird, ep->ord);
3189
3190 ep->com.cm_id = cm_id;
3191 ref_cm_id(&ep->com);
3192 ep->com.qp = qp;
3193 ref_qp(ep);
3194
3195 /* bind QP to EP and move to RTS */
3196 attrs.mpa_attr = ep->mpa_attr;
3197 attrs.max_ird = ep->ird;
3198 attrs.max_ord = ep->ord;
3199 attrs.llp_stream_handle = ep;
3200 attrs.next_state = C4IW_QP_STATE_RTS;
3201
3202 /* bind QP and TID with INIT_WR */
3203 mask = C4IW_QP_ATTR_NEXT_STATE |
3204 C4IW_QP_ATTR_LLP_STREAM_HANDLE |
3205 C4IW_QP_ATTR_MPA_ATTR |
3206 C4IW_QP_ATTR_MAX_IRD |
3207 C4IW_QP_ATTR_MAX_ORD;
3208
3209 err = c4iw_modify_qp(ep->com.qp->rhp,
3210 ep->com.qp, mask, &attrs, 1);
3211 if (err)
3212 goto err_deref_cm_id;
3213
3214 set_bit(STOP_MPA_TIMER, &ep->com.flags);
3215 err = send_mpa_reply(ep, conn_param->private_data,
3216 conn_param->private_data_len);
3217 if (err)
3218 goto err_deref_cm_id;
3219
3220 __state_set(&ep->com, FPDU_MODE);
3221 established_upcall(ep);
3222 mutex_unlock(&ep->com.mutex);
3223 c4iw_put_ep(&ep->com);
3224 return 0;
3225 err_deref_cm_id:
3226 deref_cm_id(&ep->com);
3227 err_abort:
3228 abort = 1;
3229 err_out:
3230 mutex_unlock(&ep->com.mutex);
3231 if (abort)
3232 c4iw_ep_disconnect(ep, 1, GFP_KERNEL);
3233 c4iw_put_ep(&ep->com);
3234 return err;
3235 }
3236
pick_local_ipaddrs(struct c4iw_dev * dev,struct iw_cm_id * cm_id)3237 static int pick_local_ipaddrs(struct c4iw_dev *dev, struct iw_cm_id *cm_id)
3238 {
3239 struct in_device *ind;
3240 int found = 0;
3241 struct sockaddr_in *laddr = (struct sockaddr_in *)&cm_id->m_local_addr;
3242 struct sockaddr_in *raddr = (struct sockaddr_in *)&cm_id->m_remote_addr;
3243 const struct in_ifaddr *ifa;
3244
3245 ind = in_dev_get(dev->rdev.lldi.ports[0]);
3246 if (!ind)
3247 return -EADDRNOTAVAIL;
3248 rcu_read_lock();
3249 in_dev_for_each_ifa_rcu(ifa, ind) {
3250 if (ifa->ifa_flags & IFA_F_SECONDARY)
3251 continue;
3252 laddr->sin_addr.s_addr = ifa->ifa_address;
3253 raddr->sin_addr.s_addr = ifa->ifa_address;
3254 found = 1;
3255 break;
3256 }
3257 rcu_read_unlock();
3258
3259 in_dev_put(ind);
3260 return found ? 0 : -EADDRNOTAVAIL;
3261 }
3262
get_lladdr(struct net_device * dev,struct in6_addr * addr,unsigned char banned_flags)3263 static int get_lladdr(struct net_device *dev, struct in6_addr *addr,
3264 unsigned char banned_flags)
3265 {
3266 struct inet6_dev *idev;
3267 int err = -EADDRNOTAVAIL;
3268
3269 rcu_read_lock();
3270 idev = __in6_dev_get(dev);
3271 if (idev != NULL) {
3272 struct inet6_ifaddr *ifp;
3273
3274 read_lock_bh(&idev->lock);
3275 list_for_each_entry(ifp, &idev->addr_list, if_list) {
3276 if (ifp->scope == IFA_LINK &&
3277 !(ifp->flags & banned_flags)) {
3278 memcpy(addr, &ifp->addr, 16);
3279 err = 0;
3280 break;
3281 }
3282 }
3283 read_unlock_bh(&idev->lock);
3284 }
3285 rcu_read_unlock();
3286 return err;
3287 }
3288
pick_local_ip6addrs(struct c4iw_dev * dev,struct iw_cm_id * cm_id)3289 static int pick_local_ip6addrs(struct c4iw_dev *dev, struct iw_cm_id *cm_id)
3290 {
3291 struct in6_addr addr;
3292 struct sockaddr_in6 *la6 = (struct sockaddr_in6 *)&cm_id->m_local_addr;
3293 struct sockaddr_in6 *ra6 = (struct sockaddr_in6 *)&cm_id->m_remote_addr;
3294
3295 if (!get_lladdr(dev->rdev.lldi.ports[0], &addr, IFA_F_TENTATIVE)) {
3296 memcpy(la6->sin6_addr.s6_addr, &addr, 16);
3297 memcpy(ra6->sin6_addr.s6_addr, &addr, 16);
3298 return 0;
3299 }
3300 return -EADDRNOTAVAIL;
3301 }
3302
c4iw_connect(struct iw_cm_id * cm_id,struct iw_cm_conn_param * conn_param)3303 int c4iw_connect(struct iw_cm_id *cm_id, struct iw_cm_conn_param *conn_param)
3304 {
3305 struct c4iw_dev *dev = to_c4iw_dev(cm_id->device);
3306 struct c4iw_ep *ep;
3307 int err = 0;
3308 struct sockaddr_in *laddr;
3309 struct sockaddr_in *raddr;
3310 struct sockaddr_in6 *laddr6;
3311 struct sockaddr_in6 *raddr6;
3312 __u8 *ra;
3313 int iptype;
3314
3315 if ((conn_param->ord > cur_max_read_depth(dev)) ||
3316 (conn_param->ird > cur_max_read_depth(dev))) {
3317 err = -EINVAL;
3318 goto out;
3319 }
3320 ep = alloc_ep(sizeof(*ep), GFP_KERNEL);
3321 if (!ep) {
3322 pr_err("%s - cannot alloc ep\n", __func__);
3323 err = -ENOMEM;
3324 goto out;
3325 }
3326
3327 skb_queue_head_init(&ep->com.ep_skb_list);
3328 if (alloc_ep_skb_list(&ep->com.ep_skb_list, CN_MAX_CON_BUF)) {
3329 err = -ENOMEM;
3330 goto fail1;
3331 }
3332
3333 timer_setup(&ep->timer, ep_timeout, 0);
3334 ep->plen = conn_param->private_data_len;
3335 if (ep->plen)
3336 memcpy(ep->mpa_pkt + sizeof(struct mpa_message),
3337 conn_param->private_data, ep->plen);
3338 ep->ird = conn_param->ird;
3339 ep->ord = conn_param->ord;
3340
3341 if (peer2peer && ep->ord == 0)
3342 ep->ord = 1;
3343
3344 ep->com.cm_id = cm_id;
3345 ref_cm_id(&ep->com);
3346 cm_id->provider_data = ep;
3347 ep->com.dev = dev;
3348 ep->com.qp = get_qhp(dev, conn_param->qpn);
3349 if (!ep->com.qp) {
3350 pr_warn("%s qpn 0x%x not found!\n", __func__, conn_param->qpn);
3351 err = -EINVAL;
3352 goto fail2;
3353 }
3354 ref_qp(ep);
3355 pr_debug("qpn 0x%x qp %p cm_id %p\n", conn_param->qpn,
3356 ep->com.qp, cm_id);
3357
3358 /*
3359 * Allocate an active TID to initiate a TCP connection.
3360 */
3361 ep->atid = cxgb4_alloc_atid(dev->rdev.lldi.tids, ep);
3362 if (ep->atid == -1) {
3363 pr_err("%s - cannot alloc atid\n", __func__);
3364 err = -ENOMEM;
3365 goto fail2;
3366 }
3367 err = xa_insert_irq(&dev->atids, ep->atid, ep, GFP_KERNEL);
3368 if (err)
3369 goto fail5;
3370
3371 memcpy(&ep->com.local_addr, &cm_id->m_local_addr,
3372 sizeof(ep->com.local_addr));
3373 memcpy(&ep->com.remote_addr, &cm_id->m_remote_addr,
3374 sizeof(ep->com.remote_addr));
3375
3376 laddr = (struct sockaddr_in *)&ep->com.local_addr;
3377 raddr = (struct sockaddr_in *)&ep->com.remote_addr;
3378 laddr6 = (struct sockaddr_in6 *)&ep->com.local_addr;
3379 raddr6 = (struct sockaddr_in6 *) &ep->com.remote_addr;
3380
3381 if (cm_id->m_remote_addr.ss_family == AF_INET) {
3382 iptype = 4;
3383 ra = (__u8 *)&raddr->sin_addr;
3384
3385 /*
3386 * Handle loopback requests to INADDR_ANY.
3387 */
3388 if (raddr->sin_addr.s_addr == htonl(INADDR_ANY)) {
3389 err = pick_local_ipaddrs(dev, cm_id);
3390 if (err)
3391 goto fail3;
3392 }
3393
3394 /* find a route */
3395 pr_debug("saddr %pI4 sport 0x%x raddr %pI4 rport 0x%x\n",
3396 &laddr->sin_addr, ntohs(laddr->sin_port),
3397 ra, ntohs(raddr->sin_port));
3398 ep->dst = cxgb_find_route(&dev->rdev.lldi, get_real_dev,
3399 laddr->sin_addr.s_addr,
3400 raddr->sin_addr.s_addr,
3401 laddr->sin_port,
3402 raddr->sin_port, cm_id->tos);
3403 } else {
3404 iptype = 6;
3405 ra = (__u8 *)&raddr6->sin6_addr;
3406
3407 /*
3408 * Handle loopback requests to INADDR_ANY.
3409 */
3410 if (ipv6_addr_type(&raddr6->sin6_addr) == IPV6_ADDR_ANY) {
3411 err = pick_local_ip6addrs(dev, cm_id);
3412 if (err)
3413 goto fail3;
3414 }
3415
3416 /* find a route */
3417 pr_debug("saddr %pI6 sport 0x%x raddr %pI6 rport 0x%x\n",
3418 laddr6->sin6_addr.s6_addr,
3419 ntohs(laddr6->sin6_port),
3420 raddr6->sin6_addr.s6_addr, ntohs(raddr6->sin6_port));
3421 ep->dst = cxgb_find_route6(&dev->rdev.lldi, get_real_dev,
3422 laddr6->sin6_addr.s6_addr,
3423 raddr6->sin6_addr.s6_addr,
3424 laddr6->sin6_port,
3425 raddr6->sin6_port, cm_id->tos,
3426 raddr6->sin6_scope_id);
3427 }
3428 if (!ep->dst) {
3429 pr_err("%s - cannot find route\n", __func__);
3430 err = -EHOSTUNREACH;
3431 goto fail3;
3432 }
3433
3434 err = import_ep(ep, iptype, ra, ep->dst, ep->com.dev, true,
3435 ep->com.dev->rdev.lldi.adapter_type, cm_id->tos);
3436 if (err) {
3437 pr_err("%s - cannot alloc l2e\n", __func__);
3438 goto fail4;
3439 }
3440
3441 pr_debug("txq_idx %u tx_chan %u smac_idx %u rss_qid %u l2t_idx %u\n",
3442 ep->txq_idx, ep->tx_chan, ep->smac_idx, ep->rss_qid,
3443 ep->l2t->idx);
3444
3445 state_set(&ep->com, CONNECTING);
3446 ep->tos = cm_id->tos;
3447
3448 /* send connect request to rnic */
3449 err = send_connect(ep);
3450 if (!err)
3451 goto out;
3452
3453 cxgb4_l2t_release(ep->l2t);
3454 fail4:
3455 dst_release(ep->dst);
3456 fail3:
3457 xa_erase_irq(&ep->com.dev->atids, ep->atid);
3458 fail5:
3459 cxgb4_free_atid(ep->com.dev->rdev.lldi.tids, ep->atid);
3460 fail2:
3461 skb_queue_purge(&ep->com.ep_skb_list);
3462 deref_cm_id(&ep->com);
3463 fail1:
3464 c4iw_put_ep(&ep->com);
3465 out:
3466 return err;
3467 }
3468
create_server6(struct c4iw_dev * dev,struct c4iw_listen_ep * ep)3469 static int create_server6(struct c4iw_dev *dev, struct c4iw_listen_ep *ep)
3470 {
3471 int err;
3472 struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *)
3473 &ep->com.local_addr;
3474
3475 if (ipv6_addr_type(&sin6->sin6_addr) != IPV6_ADDR_ANY) {
3476 err = cxgb4_clip_get(ep->com.dev->rdev.lldi.ports[0],
3477 (const u32 *)&sin6->sin6_addr.s6_addr, 1);
3478 if (err)
3479 return err;
3480 }
3481 c4iw_init_wr_wait(ep->com.wr_waitp);
3482 err = cxgb4_create_server6(ep->com.dev->rdev.lldi.ports[0],
3483 ep->stid, &sin6->sin6_addr,
3484 sin6->sin6_port,
3485 ep->com.dev->rdev.lldi.rxq_ids[0]);
3486 if (!err)
3487 err = c4iw_wait_for_reply(&ep->com.dev->rdev,
3488 ep->com.wr_waitp,
3489 0, 0, __func__);
3490 else if (err > 0)
3491 err = net_xmit_errno(err);
3492 if (err) {
3493 cxgb4_clip_release(ep->com.dev->rdev.lldi.ports[0],
3494 (const u32 *)&sin6->sin6_addr.s6_addr, 1);
3495 pr_err("cxgb4_create_server6/filter failed err %d stid %d laddr %pI6 lport %d\n",
3496 err, ep->stid,
3497 sin6->sin6_addr.s6_addr, ntohs(sin6->sin6_port));
3498 }
3499 return err;
3500 }
3501
create_server4(struct c4iw_dev * dev,struct c4iw_listen_ep * ep)3502 static int create_server4(struct c4iw_dev *dev, struct c4iw_listen_ep *ep)
3503 {
3504 int err;
3505 struct sockaddr_in *sin = (struct sockaddr_in *)
3506 &ep->com.local_addr;
3507
3508 if (dev->rdev.lldi.enable_fw_ofld_conn) {
3509 do {
3510 err = cxgb4_create_server_filter(
3511 ep->com.dev->rdev.lldi.ports[0], ep->stid,
3512 sin->sin_addr.s_addr, sin->sin_port, 0,
3513 ep->com.dev->rdev.lldi.rxq_ids[0], 0, 0);
3514 if (err == -EBUSY) {
3515 if (c4iw_fatal_error(&ep->com.dev->rdev)) {
3516 err = -EIO;
3517 break;
3518 }
3519 set_current_state(TASK_UNINTERRUPTIBLE);
3520 schedule_timeout(usecs_to_jiffies(100));
3521 }
3522 } while (err == -EBUSY);
3523 } else {
3524 c4iw_init_wr_wait(ep->com.wr_waitp);
3525 err = cxgb4_create_server(ep->com.dev->rdev.lldi.ports[0],
3526 ep->stid, sin->sin_addr.s_addr, sin->sin_port,
3527 0, ep->com.dev->rdev.lldi.rxq_ids[0]);
3528 if (!err)
3529 err = c4iw_wait_for_reply(&ep->com.dev->rdev,
3530 ep->com.wr_waitp,
3531 0, 0, __func__);
3532 else if (err > 0)
3533 err = net_xmit_errno(err);
3534 }
3535 if (err)
3536 pr_err("cxgb4_create_server/filter failed err %d stid %d laddr %pI4 lport %d\n"
3537 , err, ep->stid,
3538 &sin->sin_addr, ntohs(sin->sin_port));
3539 return err;
3540 }
3541
c4iw_create_listen(struct iw_cm_id * cm_id,int backlog)3542 int c4iw_create_listen(struct iw_cm_id *cm_id, int backlog)
3543 {
3544 int err = 0;
3545 struct c4iw_dev *dev = to_c4iw_dev(cm_id->device);
3546 struct c4iw_listen_ep *ep;
3547
3548 might_sleep();
3549
3550 ep = alloc_ep(sizeof(*ep), GFP_KERNEL);
3551 if (!ep) {
3552 pr_err("%s - cannot alloc ep\n", __func__);
3553 err = -ENOMEM;
3554 goto fail1;
3555 }
3556 skb_queue_head_init(&ep->com.ep_skb_list);
3557 pr_debug("ep %p\n", ep);
3558 ep->com.cm_id = cm_id;
3559 ref_cm_id(&ep->com);
3560 ep->com.dev = dev;
3561 ep->backlog = backlog;
3562 memcpy(&ep->com.local_addr, &cm_id->m_local_addr,
3563 sizeof(ep->com.local_addr));
3564
3565 /*
3566 * Allocate a server TID.
3567 */
3568 if (dev->rdev.lldi.enable_fw_ofld_conn &&
3569 ep->com.local_addr.ss_family == AF_INET)
3570 ep->stid = cxgb4_alloc_sftid(dev->rdev.lldi.tids,
3571 cm_id->m_local_addr.ss_family, ep);
3572 else
3573 ep->stid = cxgb4_alloc_stid(dev->rdev.lldi.tids,
3574 cm_id->m_local_addr.ss_family, ep);
3575
3576 if (ep->stid == -1) {
3577 pr_err("%s - cannot alloc stid\n", __func__);
3578 err = -ENOMEM;
3579 goto fail2;
3580 }
3581 err = xa_insert_irq(&dev->stids, ep->stid, ep, GFP_KERNEL);
3582 if (err)
3583 goto fail3;
3584
3585 state_set(&ep->com, LISTEN);
3586 if (ep->com.local_addr.ss_family == AF_INET)
3587 err = create_server4(dev, ep);
3588 else
3589 err = create_server6(dev, ep);
3590 if (!err) {
3591 cm_id->provider_data = ep;
3592 goto out;
3593 }
3594 xa_erase_irq(&ep->com.dev->stids, ep->stid);
3595 fail3:
3596 cxgb4_free_stid(ep->com.dev->rdev.lldi.tids, ep->stid,
3597 ep->com.local_addr.ss_family);
3598 fail2:
3599 deref_cm_id(&ep->com);
3600 c4iw_put_ep(&ep->com);
3601 fail1:
3602 out:
3603 return err;
3604 }
3605
c4iw_destroy_listen(struct iw_cm_id * cm_id)3606 int c4iw_destroy_listen(struct iw_cm_id *cm_id)
3607 {
3608 int err;
3609 struct c4iw_listen_ep *ep = to_listen_ep(cm_id);
3610
3611 pr_debug("ep %p\n", ep);
3612
3613 might_sleep();
3614 state_set(&ep->com, DEAD);
3615 if (ep->com.dev->rdev.lldi.enable_fw_ofld_conn &&
3616 ep->com.local_addr.ss_family == AF_INET) {
3617 err = cxgb4_remove_server_filter(
3618 ep->com.dev->rdev.lldi.ports[0], ep->stid,
3619 ep->com.dev->rdev.lldi.rxq_ids[0], false);
3620 } else {
3621 struct sockaddr_in6 *sin6;
3622 c4iw_init_wr_wait(ep->com.wr_waitp);
3623 err = cxgb4_remove_server(
3624 ep->com.dev->rdev.lldi.ports[0], ep->stid,
3625 ep->com.dev->rdev.lldi.rxq_ids[0],
3626 ep->com.local_addr.ss_family == AF_INET6);
3627 if (err)
3628 goto done;
3629 err = c4iw_wait_for_reply(&ep->com.dev->rdev, ep->com.wr_waitp,
3630 0, 0, __func__);
3631 sin6 = (struct sockaddr_in6 *)&ep->com.local_addr;
3632 cxgb4_clip_release(ep->com.dev->rdev.lldi.ports[0],
3633 (const u32 *)&sin6->sin6_addr.s6_addr, 1);
3634 }
3635 xa_erase_irq(&ep->com.dev->stids, ep->stid);
3636 cxgb4_free_stid(ep->com.dev->rdev.lldi.tids, ep->stid,
3637 ep->com.local_addr.ss_family);
3638 done:
3639 deref_cm_id(&ep->com);
3640 c4iw_put_ep(&ep->com);
3641 return err;
3642 }
3643
c4iw_ep_disconnect(struct c4iw_ep * ep,int abrupt,gfp_t gfp)3644 int c4iw_ep_disconnect(struct c4iw_ep *ep, int abrupt, gfp_t gfp)
3645 {
3646 int ret = 0;
3647 int close = 0;
3648 int fatal = 0;
3649 struct c4iw_rdev *rdev;
3650
3651 mutex_lock(&ep->com.mutex);
3652
3653 pr_debug("ep %p state %s, abrupt %d\n", ep,
3654 states[ep->com.state], abrupt);
3655
3656 /*
3657 * Ref the ep here in case we have fatal errors causing the
3658 * ep to be released and freed.
3659 */
3660 c4iw_get_ep(&ep->com);
3661
3662 rdev = &ep->com.dev->rdev;
3663 if (c4iw_fatal_error(rdev)) {
3664 fatal = 1;
3665 close_complete_upcall(ep, -EIO);
3666 ep->com.state = DEAD;
3667 }
3668 switch (ep->com.state) {
3669 case MPA_REQ_WAIT:
3670 case MPA_REQ_SENT:
3671 case MPA_REQ_RCVD:
3672 case MPA_REP_SENT:
3673 case FPDU_MODE:
3674 case CONNECTING:
3675 close = 1;
3676 if (abrupt)
3677 ep->com.state = ABORTING;
3678 else {
3679 ep->com.state = CLOSING;
3680
3681 /*
3682 * if we close before we see the fw4_ack() then we fix
3683 * up the timer state since we're reusing it.
3684 */
3685 if (ep->mpa_skb &&
3686 test_bit(STOP_MPA_TIMER, &ep->com.flags)) {
3687 clear_bit(STOP_MPA_TIMER, &ep->com.flags);
3688 stop_ep_timer(ep);
3689 }
3690 start_ep_timer(ep);
3691 }
3692 set_bit(CLOSE_SENT, &ep->com.flags);
3693 break;
3694 case CLOSING:
3695 if (!test_and_set_bit(CLOSE_SENT, &ep->com.flags)) {
3696 close = 1;
3697 if (abrupt) {
3698 (void)stop_ep_timer(ep);
3699 ep->com.state = ABORTING;
3700 } else
3701 ep->com.state = MORIBUND;
3702 }
3703 break;
3704 case MORIBUND:
3705 case ABORTING:
3706 case DEAD:
3707 pr_debug("ignoring disconnect ep %p state %u\n",
3708 ep, ep->com.state);
3709 break;
3710 default:
3711 WARN_ONCE(1, "Bad endpoint state %u\n", ep->com.state);
3712 break;
3713 }
3714
3715 if (close) {
3716 if (abrupt) {
3717 set_bit(EP_DISC_ABORT, &ep->com.history);
3718 ret = send_abort(ep);
3719 } else {
3720 set_bit(EP_DISC_CLOSE, &ep->com.history);
3721 ret = send_halfclose(ep);
3722 }
3723 if (ret) {
3724 set_bit(EP_DISC_FAIL, &ep->com.history);
3725 if (!abrupt) {
3726 stop_ep_timer(ep);
3727 close_complete_upcall(ep, -EIO);
3728 }
3729 if (ep->com.qp) {
3730 struct c4iw_qp_attributes attrs;
3731
3732 attrs.next_state = C4IW_QP_STATE_ERROR;
3733 ret = c4iw_modify_qp(ep->com.qp->rhp,
3734 ep->com.qp,
3735 C4IW_QP_ATTR_NEXT_STATE,
3736 &attrs, 1);
3737 if (ret)
3738 pr_err("%s - qp <- error failed!\n",
3739 __func__);
3740 }
3741 fatal = 1;
3742 }
3743 }
3744 mutex_unlock(&ep->com.mutex);
3745 c4iw_put_ep(&ep->com);
3746 if (fatal)
3747 release_ep_resources(ep);
3748 return ret;
3749 }
3750
active_ofld_conn_reply(struct c4iw_dev * dev,struct sk_buff * skb,struct cpl_fw6_msg_ofld_connection_wr_rpl * req)3751 static void active_ofld_conn_reply(struct c4iw_dev *dev, struct sk_buff *skb,
3752 struct cpl_fw6_msg_ofld_connection_wr_rpl *req)
3753 {
3754 struct c4iw_ep *ep;
3755 int atid = be32_to_cpu(req->tid);
3756
3757 ep = (struct c4iw_ep *)lookup_atid(dev->rdev.lldi.tids,
3758 (__force u32) req->tid);
3759 if (!ep)
3760 return;
3761
3762 switch (req->retval) {
3763 case FW_ENOMEM:
3764 set_bit(ACT_RETRY_NOMEM, &ep->com.history);
3765 if (ep->retry_count++ < ACT_OPEN_RETRY_COUNT) {
3766 send_fw_act_open_req(ep, atid);
3767 return;
3768 }
3769 fallthrough;
3770 case FW_EADDRINUSE:
3771 set_bit(ACT_RETRY_INUSE, &ep->com.history);
3772 if (ep->retry_count++ < ACT_OPEN_RETRY_COUNT) {
3773 send_fw_act_open_req(ep, atid);
3774 return;
3775 }
3776 break;
3777 default:
3778 pr_info("%s unexpected ofld conn wr retval %d\n",
3779 __func__, req->retval);
3780 break;
3781 }
3782 pr_err("active ofld_connect_wr failure %d atid %d\n",
3783 req->retval, atid);
3784 mutex_lock(&dev->rdev.stats.lock);
3785 dev->rdev.stats.act_ofld_conn_fails++;
3786 mutex_unlock(&dev->rdev.stats.lock);
3787 connect_reply_upcall(ep, status2errno(req->retval));
3788 state_set(&ep->com, DEAD);
3789 if (ep->com.remote_addr.ss_family == AF_INET6) {
3790 struct sockaddr_in6 *sin6 =
3791 (struct sockaddr_in6 *)&ep->com.local_addr;
3792 cxgb4_clip_release(ep->com.dev->rdev.lldi.ports[0],
3793 (const u32 *)&sin6->sin6_addr.s6_addr, 1);
3794 }
3795 xa_erase_irq(&dev->atids, atid);
3796 cxgb4_free_atid(dev->rdev.lldi.tids, atid);
3797 dst_release(ep->dst);
3798 cxgb4_l2t_release(ep->l2t);
3799 c4iw_put_ep(&ep->com);
3800 }
3801
passive_ofld_conn_reply(struct c4iw_dev * dev,struct sk_buff * skb,struct cpl_fw6_msg_ofld_connection_wr_rpl * req)3802 static void passive_ofld_conn_reply(struct c4iw_dev *dev, struct sk_buff *skb,
3803 struct cpl_fw6_msg_ofld_connection_wr_rpl *req)
3804 {
3805 struct sk_buff *rpl_skb;
3806 struct cpl_pass_accept_req *cpl;
3807 int ret;
3808
3809 rpl_skb = (struct sk_buff *)(unsigned long)req->cookie;
3810 if (req->retval) {
3811 pr_err("%s passive open failure %d\n", __func__, req->retval);
3812 mutex_lock(&dev->rdev.stats.lock);
3813 dev->rdev.stats.pas_ofld_conn_fails++;
3814 mutex_unlock(&dev->rdev.stats.lock);
3815 kfree_skb(rpl_skb);
3816 } else {
3817 cpl = (struct cpl_pass_accept_req *)cplhdr(rpl_skb);
3818 OPCODE_TID(cpl) = htonl(MK_OPCODE_TID(CPL_PASS_ACCEPT_REQ,
3819 (__force u32) htonl(
3820 (__force u32) req->tid)));
3821 ret = pass_accept_req(dev, rpl_skb);
3822 if (!ret)
3823 kfree_skb(rpl_skb);
3824 }
3825 return;
3826 }
3827
t4_tcb_get_field64(__be64 * tcb,u16 word)3828 static inline u64 t4_tcb_get_field64(__be64 *tcb, u16 word)
3829 {
3830 u64 tlo = be64_to_cpu(tcb[((31 - word) / 2)]);
3831 u64 thi = be64_to_cpu(tcb[((31 - word) / 2) - 1]);
3832 u64 t;
3833 u32 shift = 32;
3834
3835 t = (thi << shift) | (tlo >> shift);
3836
3837 return t;
3838 }
3839
t4_tcb_get_field32(__be64 * tcb,u16 word,u32 mask,u32 shift)3840 static inline u32 t4_tcb_get_field32(__be64 *tcb, u16 word, u32 mask, u32 shift)
3841 {
3842 u32 v;
3843 u64 t = be64_to_cpu(tcb[(31 - word) / 2]);
3844
3845 if (word & 0x1)
3846 shift += 32;
3847 v = (t >> shift) & mask;
3848 return v;
3849 }
3850
read_tcb_rpl(struct c4iw_dev * dev,struct sk_buff * skb)3851 static int read_tcb_rpl(struct c4iw_dev *dev, struct sk_buff *skb)
3852 {
3853 struct cpl_get_tcb_rpl *rpl = cplhdr(skb);
3854 __be64 *tcb = (__be64 *)(rpl + 1);
3855 unsigned int tid = GET_TID(rpl);
3856 struct c4iw_ep *ep;
3857 u64 t_flags_64;
3858 u32 rx_pdu_out;
3859
3860 ep = get_ep_from_tid(dev, tid);
3861 if (!ep)
3862 return 0;
3863 /* Examine the TF_RX_PDU_OUT (bit 49 of the t_flags) in order to
3864 * determine if there's a rx PDU feedback event pending.
3865 *
3866 * If that bit is set, it means we'll need to re-read the TCB's
3867 * rq_start value. The final value is the one present in a TCB
3868 * with the TF_RX_PDU_OUT bit cleared.
3869 */
3870
3871 t_flags_64 = t4_tcb_get_field64(tcb, TCB_T_FLAGS_W);
3872 rx_pdu_out = (t_flags_64 & TF_RX_PDU_OUT_V(1)) >> TF_RX_PDU_OUT_S;
3873
3874 c4iw_put_ep(&ep->com); /* from get_ep_from_tid() */
3875 c4iw_put_ep(&ep->com); /* from read_tcb() */
3876
3877 /* If TF_RX_PDU_OUT bit is set, re-read the TCB */
3878 if (rx_pdu_out) {
3879 if (++ep->rx_pdu_out_cnt >= 2) {
3880 WARN_ONCE(1, "tcb re-read() reached the guard limit, finishing the cleanup\n");
3881 goto cleanup;
3882 }
3883 read_tcb(ep);
3884 return 0;
3885 }
3886
3887 ep->srqe_idx = t4_tcb_get_field32(tcb, TCB_RQ_START_W, TCB_RQ_START_M,
3888 TCB_RQ_START_S);
3889 cleanup:
3890 pr_debug("ep %p tid %u %016x\n", ep, ep->hwtid, ep->srqe_idx);
3891
3892 if (test_bit(PEER_ABORT_IN_PROGRESS, &ep->com.flags))
3893 finish_peer_abort(dev, ep);
3894 else if (test_bit(ABORT_REQ_IN_PROGRESS, &ep->com.flags))
3895 send_abort_req(ep);
3896 else
3897 WARN_ONCE(1, "unexpected state!");
3898
3899 return 0;
3900 }
3901
deferred_fw6_msg(struct c4iw_dev * dev,struct sk_buff * skb)3902 static int deferred_fw6_msg(struct c4iw_dev *dev, struct sk_buff *skb)
3903 {
3904 struct cpl_fw6_msg *rpl = cplhdr(skb);
3905 struct cpl_fw6_msg_ofld_connection_wr_rpl *req;
3906
3907 switch (rpl->type) {
3908 case FW6_TYPE_CQE:
3909 c4iw_ev_dispatch(dev, (struct t4_cqe *)&rpl->data[0]);
3910 break;
3911 case FW6_TYPE_OFLD_CONNECTION_WR_RPL:
3912 req = (struct cpl_fw6_msg_ofld_connection_wr_rpl *)rpl->data;
3913 switch (req->t_state) {
3914 case TCP_SYN_SENT:
3915 active_ofld_conn_reply(dev, skb, req);
3916 break;
3917 case TCP_SYN_RECV:
3918 passive_ofld_conn_reply(dev, skb, req);
3919 break;
3920 default:
3921 pr_err("%s unexpected ofld conn wr state %d\n",
3922 __func__, req->t_state);
3923 break;
3924 }
3925 break;
3926 }
3927 return 0;
3928 }
3929
build_cpl_pass_accept_req(struct sk_buff * skb,int stid,u8 tos)3930 static void build_cpl_pass_accept_req(struct sk_buff *skb, int stid , u8 tos)
3931 {
3932 __be32 l2info;
3933 __be16 hdr_len, vlantag, len;
3934 u16 eth_hdr_len;
3935 int tcp_hdr_len, ip_hdr_len;
3936 u8 intf;
3937 struct cpl_rx_pkt *cpl = cplhdr(skb);
3938 struct cpl_pass_accept_req *req;
3939 struct tcp_options_received tmp_opt;
3940 struct c4iw_dev *dev;
3941 enum chip_type type;
3942
3943 dev = *((struct c4iw_dev **) (skb->cb + sizeof(void *)));
3944 /* Store values from cpl_rx_pkt in temporary location. */
3945 vlantag = cpl->vlan;
3946 len = cpl->len;
3947 l2info = cpl->l2info;
3948 hdr_len = cpl->hdr_len;
3949 intf = cpl->iff;
3950
3951 __skb_pull(skb, sizeof(*req) + sizeof(struct rss_header));
3952
3953 /*
3954 * We need to parse the TCP options from SYN packet.
3955 * to generate cpl_pass_accept_req.
3956 */
3957 memset(&tmp_opt, 0, sizeof(tmp_opt));
3958 tcp_clear_options(&tmp_opt);
3959 tcp_parse_options(&init_net, skb, &tmp_opt, 0, NULL);
3960
3961 req = __skb_push(skb, sizeof(*req));
3962 memset(req, 0, sizeof(*req));
3963 req->l2info = cpu_to_be16(SYN_INTF_V(intf) |
3964 SYN_MAC_IDX_V(RX_MACIDX_G(
3965 be32_to_cpu(l2info))) |
3966 SYN_XACT_MATCH_F);
3967 type = dev->rdev.lldi.adapter_type;
3968 tcp_hdr_len = RX_TCPHDR_LEN_G(be16_to_cpu(hdr_len));
3969 ip_hdr_len = RX_IPHDR_LEN_G(be16_to_cpu(hdr_len));
3970 req->hdr_len =
3971 cpu_to_be32(SYN_RX_CHAN_V(RX_CHAN_G(be32_to_cpu(l2info))));
3972 if (CHELSIO_CHIP_VERSION(type) <= CHELSIO_T5) {
3973 eth_hdr_len = is_t4(type) ?
3974 RX_ETHHDR_LEN_G(be32_to_cpu(l2info)) :
3975 RX_T5_ETHHDR_LEN_G(be32_to_cpu(l2info));
3976 req->hdr_len |= cpu_to_be32(TCP_HDR_LEN_V(tcp_hdr_len) |
3977 IP_HDR_LEN_V(ip_hdr_len) |
3978 ETH_HDR_LEN_V(eth_hdr_len));
3979 } else { /* T6 and later */
3980 eth_hdr_len = RX_T6_ETHHDR_LEN_G(be32_to_cpu(l2info));
3981 req->hdr_len |= cpu_to_be32(T6_TCP_HDR_LEN_V(tcp_hdr_len) |
3982 T6_IP_HDR_LEN_V(ip_hdr_len) |
3983 T6_ETH_HDR_LEN_V(eth_hdr_len));
3984 }
3985 req->vlan = vlantag;
3986 req->len = len;
3987 req->tos_stid = cpu_to_be32(PASS_OPEN_TID_V(stid) |
3988 PASS_OPEN_TOS_V(tos));
3989 req->tcpopt.mss = htons(tmp_opt.mss_clamp);
3990 if (tmp_opt.wscale_ok)
3991 req->tcpopt.wsf = tmp_opt.snd_wscale;
3992 req->tcpopt.tstamp = tmp_opt.saw_tstamp;
3993 if (tmp_opt.sack_ok)
3994 req->tcpopt.sack = 1;
3995 OPCODE_TID(req) = htonl(MK_OPCODE_TID(CPL_PASS_ACCEPT_REQ, 0));
3996 return;
3997 }
3998
send_fw_pass_open_req(struct c4iw_dev * dev,struct sk_buff * skb,__be32 laddr,__be16 lport,__be32 raddr,__be16 rport,u32 rcv_isn,u32 filter,u16 window,u32 rss_qid,u8 port_id)3999 static void send_fw_pass_open_req(struct c4iw_dev *dev, struct sk_buff *skb,
4000 __be32 laddr, __be16 lport,
4001 __be32 raddr, __be16 rport,
4002 u32 rcv_isn, u32 filter, u16 window,
4003 u32 rss_qid, u8 port_id)
4004 {
4005 struct sk_buff *req_skb;
4006 struct fw_ofld_connection_wr *req;
4007 struct cpl_pass_accept_req *cpl = cplhdr(skb);
4008 int ret;
4009
4010 req_skb = alloc_skb(sizeof(struct fw_ofld_connection_wr), GFP_KERNEL);
4011 if (!req_skb)
4012 return;
4013 req = __skb_put_zero(req_skb, sizeof(*req));
4014 req->op_compl = htonl(WR_OP_V(FW_OFLD_CONNECTION_WR) | FW_WR_COMPL_F);
4015 req->len16_pkd = htonl(FW_WR_LEN16_V(DIV_ROUND_UP(sizeof(*req), 16)));
4016 req->le.version_cpl = htonl(FW_OFLD_CONNECTION_WR_CPL_F);
4017 req->le.filter = (__force __be32) filter;
4018 req->le.lport = lport;
4019 req->le.pport = rport;
4020 req->le.u.ipv4.lip = laddr;
4021 req->le.u.ipv4.pip = raddr;
4022 req->tcb.rcv_nxt = htonl(rcv_isn + 1);
4023 req->tcb.rcv_adv = htons(window);
4024 req->tcb.t_state_to_astid =
4025 htonl(FW_OFLD_CONNECTION_WR_T_STATE_V(TCP_SYN_RECV) |
4026 FW_OFLD_CONNECTION_WR_RCV_SCALE_V(cpl->tcpopt.wsf) |
4027 FW_OFLD_CONNECTION_WR_ASTID_V(
4028 PASS_OPEN_TID_G(ntohl(cpl->tos_stid))));
4029
4030 /*
4031 * We store the qid in opt2 which will be used by the firmware
4032 * to send us the wr response.
4033 */
4034 req->tcb.opt2 = htonl(RSS_QUEUE_V(rss_qid));
4035
4036 /*
4037 * We initialize the MSS index in TCB to 0xF.
4038 * So that when driver sends cpl_pass_accept_rpl
4039 * TCB picks up the correct value. If this was 0
4040 * TP will ignore any value > 0 for MSS index.
4041 */
4042 req->tcb.opt0 = cpu_to_be64(MSS_IDX_V(0xF));
4043 req->cookie = (uintptr_t)skb;
4044
4045 set_wr_txq(req_skb, CPL_PRIORITY_CONTROL, port_id);
4046 ret = cxgb4_ofld_send(dev->rdev.lldi.ports[0], req_skb);
4047 if (ret < 0) {
4048 pr_err("%s - cxgb4_ofld_send error %d - dropping\n", __func__,
4049 ret);
4050 kfree_skb(skb);
4051 kfree_skb(req_skb);
4052 }
4053 }
4054
4055 /*
4056 * Handler for CPL_RX_PKT message. Need to handle cpl_rx_pkt
4057 * messages when a filter is being used instead of server to
4058 * redirect a syn packet. When packets hit filter they are redirected
4059 * to the offload queue and driver tries to establish the connection
4060 * using firmware work request.
4061 */
rx_pkt(struct c4iw_dev * dev,struct sk_buff * skb)4062 static int rx_pkt(struct c4iw_dev *dev, struct sk_buff *skb)
4063 {
4064 int stid;
4065 unsigned int filter;
4066 struct ethhdr *eh = NULL;
4067 struct vlan_ethhdr *vlan_eh = NULL;
4068 struct iphdr *iph;
4069 struct tcphdr *tcph;
4070 struct rss_header *rss = (void *)skb->data;
4071 struct cpl_rx_pkt *cpl = (void *)skb->data;
4072 struct cpl_pass_accept_req *req = (void *)(rss + 1);
4073 struct l2t_entry *e;
4074 struct dst_entry *dst;
4075 struct c4iw_ep *lep = NULL;
4076 u16 window;
4077 struct port_info *pi;
4078 struct net_device *pdev;
4079 u16 rss_qid, eth_hdr_len;
4080 int step;
4081 struct neighbour *neigh;
4082
4083 /* Drop all non-SYN packets */
4084 if (!(cpl->l2info & cpu_to_be32(RXF_SYN_F)))
4085 goto reject;
4086
4087 /*
4088 * Drop all packets which did not hit the filter.
4089 * Unlikely to happen.
4090 */
4091 if (!(rss->filter_hit && rss->filter_tid))
4092 goto reject;
4093
4094 /*
4095 * Calculate the server tid from filter hit index from cpl_rx_pkt.
4096 */
4097 stid = (__force int) cpu_to_be32((__force u32) rss->hash_val);
4098
4099 lep = (struct c4iw_ep *)get_ep_from_stid(dev, stid);
4100 if (!lep) {
4101 pr_warn("%s connect request on invalid stid %d\n",
4102 __func__, stid);
4103 goto reject;
4104 }
4105
4106 switch (CHELSIO_CHIP_VERSION(dev->rdev.lldi.adapter_type)) {
4107 case CHELSIO_T4:
4108 eth_hdr_len = RX_ETHHDR_LEN_G(be32_to_cpu(cpl->l2info));
4109 break;
4110 case CHELSIO_T5:
4111 eth_hdr_len = RX_T5_ETHHDR_LEN_G(be32_to_cpu(cpl->l2info));
4112 break;
4113 case CHELSIO_T6:
4114 eth_hdr_len = RX_T6_ETHHDR_LEN_G(be32_to_cpu(cpl->l2info));
4115 break;
4116 default:
4117 pr_err("T%d Chip is not supported\n",
4118 CHELSIO_CHIP_VERSION(dev->rdev.lldi.adapter_type));
4119 goto reject;
4120 }
4121
4122 if (eth_hdr_len == ETH_HLEN) {
4123 eh = (struct ethhdr *)(req + 1);
4124 iph = (struct iphdr *)(eh + 1);
4125 } else {
4126 vlan_eh = (struct vlan_ethhdr *)(req + 1);
4127 iph = (struct iphdr *)(vlan_eh + 1);
4128 __vlan_hwaccel_put_tag(skb, htons(ETH_P_8021Q), ntohs(cpl->vlan));
4129 }
4130
4131 if (iph->version != 0x4)
4132 goto reject;
4133
4134 tcph = (struct tcphdr *)(iph + 1);
4135 skb_set_network_header(skb, (void *)iph - (void *)rss);
4136 skb_set_transport_header(skb, (void *)tcph - (void *)rss);
4137 skb_get(skb);
4138
4139 pr_debug("lip 0x%x lport %u pip 0x%x pport %u tos %d\n",
4140 ntohl(iph->daddr), ntohs(tcph->dest), ntohl(iph->saddr),
4141 ntohs(tcph->source), iph->tos);
4142
4143 dst = cxgb_find_route(&dev->rdev.lldi, get_real_dev,
4144 iph->daddr, iph->saddr, tcph->dest,
4145 tcph->source, iph->tos);
4146 if (!dst) {
4147 pr_err("%s - failed to find dst entry!\n", __func__);
4148 goto reject;
4149 }
4150 neigh = dst_neigh_lookup_skb(dst, skb);
4151
4152 if (!neigh) {
4153 pr_err("%s - failed to allocate neigh!\n", __func__);
4154 goto free_dst;
4155 }
4156
4157 if (neigh->dev->flags & IFF_LOOPBACK) {
4158 pdev = ip_dev_find(&init_net, iph->daddr);
4159 if (!pdev) {
4160 pr_err("%s - failed to find device!\n", __func__);
4161 goto free_dst;
4162 }
4163 e = cxgb4_l2t_get(dev->rdev.lldi.l2t, neigh,
4164 pdev, 0);
4165 pi = (struct port_info *)netdev_priv(pdev);
4166 dev_put(pdev);
4167 } else {
4168 pdev = get_real_dev(neigh->dev);
4169 e = cxgb4_l2t_get(dev->rdev.lldi.l2t, neigh,
4170 pdev, 0);
4171 pi = (struct port_info *)netdev_priv(pdev);
4172 }
4173 neigh_release(neigh);
4174 if (!e) {
4175 pr_err("%s - failed to allocate l2t entry!\n",
4176 __func__);
4177 goto free_dst;
4178 }
4179
4180 step = dev->rdev.lldi.nrxq / dev->rdev.lldi.nchan;
4181 rss_qid = dev->rdev.lldi.rxq_ids[pi->port_id * step];
4182 window = (__force u16) htons((__force u16)tcph->window);
4183
4184 /* Calcuate filter portion for LE region. */
4185 filter = (__force unsigned int) cpu_to_be32(cxgb4_select_ntuple(
4186 dev->rdev.lldi.ports[0],
4187 e));
4188
4189 /*
4190 * Synthesize the cpl_pass_accept_req. We have everything except the
4191 * TID. Once firmware sends a reply with TID we update the TID field
4192 * in cpl and pass it through the regular cpl_pass_accept_req path.
4193 */
4194 build_cpl_pass_accept_req(skb, stid, iph->tos);
4195 send_fw_pass_open_req(dev, skb, iph->daddr, tcph->dest, iph->saddr,
4196 tcph->source, ntohl(tcph->seq), filter, window,
4197 rss_qid, pi->port_id);
4198 cxgb4_l2t_release(e);
4199 free_dst:
4200 dst_release(dst);
4201 reject:
4202 if (lep)
4203 c4iw_put_ep(&lep->com);
4204 return 0;
4205 }
4206
4207 /*
4208 * These are the real handlers that are called from a
4209 * work queue.
4210 */
4211 static c4iw_handler_func work_handlers[NUM_CPL_CMDS + NUM_FAKE_CPLS] = {
4212 [CPL_ACT_ESTABLISH] = act_establish,
4213 [CPL_ACT_OPEN_RPL] = act_open_rpl,
4214 [CPL_RX_DATA] = rx_data,
4215 [CPL_ABORT_RPL_RSS] = abort_rpl,
4216 [CPL_ABORT_RPL] = abort_rpl,
4217 [CPL_PASS_OPEN_RPL] = pass_open_rpl,
4218 [CPL_CLOSE_LISTSRV_RPL] = close_listsrv_rpl,
4219 [CPL_PASS_ACCEPT_REQ] = pass_accept_req,
4220 [CPL_PASS_ESTABLISH] = pass_establish,
4221 [CPL_PEER_CLOSE] = peer_close,
4222 [CPL_ABORT_REQ_RSS] = peer_abort,
4223 [CPL_CLOSE_CON_RPL] = close_con_rpl,
4224 [CPL_RDMA_TERMINATE] = terminate,
4225 [CPL_FW4_ACK] = fw4_ack,
4226 [CPL_GET_TCB_RPL] = read_tcb_rpl,
4227 [CPL_FW6_MSG] = deferred_fw6_msg,
4228 [CPL_RX_PKT] = rx_pkt,
4229 [FAKE_CPL_PUT_EP_SAFE] = _put_ep_safe,
4230 [FAKE_CPL_PASS_PUT_EP_SAFE] = _put_pass_ep_safe
4231 };
4232
process_timeout(struct c4iw_ep * ep)4233 static void process_timeout(struct c4iw_ep *ep)
4234 {
4235 struct c4iw_qp_attributes attrs;
4236 int abort = 1;
4237
4238 mutex_lock(&ep->com.mutex);
4239 pr_debug("ep %p tid %u state %d\n", ep, ep->hwtid, ep->com.state);
4240 set_bit(TIMEDOUT, &ep->com.history);
4241 switch (ep->com.state) {
4242 case MPA_REQ_SENT:
4243 connect_reply_upcall(ep, -ETIMEDOUT);
4244 break;
4245 case MPA_REQ_WAIT:
4246 case MPA_REQ_RCVD:
4247 case MPA_REP_SENT:
4248 case FPDU_MODE:
4249 break;
4250 case CLOSING:
4251 case MORIBUND:
4252 if (ep->com.cm_id && ep->com.qp) {
4253 attrs.next_state = C4IW_QP_STATE_ERROR;
4254 c4iw_modify_qp(ep->com.qp->rhp,
4255 ep->com.qp, C4IW_QP_ATTR_NEXT_STATE,
4256 &attrs, 1);
4257 }
4258 close_complete_upcall(ep, -ETIMEDOUT);
4259 break;
4260 case ABORTING:
4261 case DEAD:
4262
4263 /*
4264 * These states are expected if the ep timed out at the same
4265 * time as another thread was calling stop_ep_timer().
4266 * So we silently do nothing for these states.
4267 */
4268 abort = 0;
4269 break;
4270 default:
4271 WARN(1, "%s unexpected state ep %p tid %u state %u\n",
4272 __func__, ep, ep->hwtid, ep->com.state);
4273 abort = 0;
4274 }
4275 mutex_unlock(&ep->com.mutex);
4276 if (abort)
4277 c4iw_ep_disconnect(ep, 1, GFP_KERNEL);
4278 c4iw_put_ep(&ep->com);
4279 }
4280
process_timedout_eps(void)4281 static void process_timedout_eps(void)
4282 {
4283 struct c4iw_ep *ep;
4284
4285 spin_lock_irq(&timeout_lock);
4286 while (!list_empty(&timeout_list)) {
4287 struct list_head *tmp;
4288
4289 tmp = timeout_list.next;
4290 list_del(tmp);
4291 tmp->next = NULL;
4292 tmp->prev = NULL;
4293 spin_unlock_irq(&timeout_lock);
4294 ep = list_entry(tmp, struct c4iw_ep, entry);
4295 process_timeout(ep);
4296 spin_lock_irq(&timeout_lock);
4297 }
4298 spin_unlock_irq(&timeout_lock);
4299 }
4300
process_work(struct work_struct * work)4301 static void process_work(struct work_struct *work)
4302 {
4303 struct sk_buff *skb = NULL;
4304 struct c4iw_dev *dev;
4305 struct cpl_act_establish *rpl;
4306 unsigned int opcode;
4307 int ret;
4308
4309 process_timedout_eps();
4310 while ((skb = skb_dequeue(&rxq))) {
4311 rpl = cplhdr(skb);
4312 dev = *((struct c4iw_dev **) (skb->cb + sizeof(void *)));
4313 opcode = rpl->ot.opcode;
4314
4315 if (opcode >= ARRAY_SIZE(work_handlers) ||
4316 !work_handlers[opcode]) {
4317 pr_err("No handler for opcode 0x%x.\n", opcode);
4318 kfree_skb(skb);
4319 } else {
4320 ret = work_handlers[opcode](dev, skb);
4321 if (!ret)
4322 kfree_skb(skb);
4323 }
4324 process_timedout_eps();
4325 }
4326 }
4327
4328 static DECLARE_WORK(skb_work, process_work);
4329
ep_timeout(struct timer_list * t)4330 static void ep_timeout(struct timer_list *t)
4331 {
4332 struct c4iw_ep *ep = from_timer(ep, t, timer);
4333 int kickit = 0;
4334
4335 spin_lock(&timeout_lock);
4336 if (!test_and_set_bit(TIMEOUT, &ep->com.flags)) {
4337 /*
4338 * Only insert if it is not already on the list.
4339 */
4340 if (!ep->entry.next) {
4341 list_add_tail(&ep->entry, &timeout_list);
4342 kickit = 1;
4343 }
4344 }
4345 spin_unlock(&timeout_lock);
4346 if (kickit)
4347 queue_work(workq, &skb_work);
4348 }
4349
4350 /*
4351 * All the CM events are handled on a work queue to have a safe context.
4352 */
sched(struct c4iw_dev * dev,struct sk_buff * skb)4353 static int sched(struct c4iw_dev *dev, struct sk_buff *skb)
4354 {
4355
4356 /*
4357 * Save dev in the skb->cb area.
4358 */
4359 *((struct c4iw_dev **) (skb->cb + sizeof(void *))) = dev;
4360
4361 /*
4362 * Queue the skb and schedule the worker thread.
4363 */
4364 skb_queue_tail(&rxq, skb);
4365 queue_work(workq, &skb_work);
4366 return 0;
4367 }
4368
set_tcb_rpl(struct c4iw_dev * dev,struct sk_buff * skb)4369 static int set_tcb_rpl(struct c4iw_dev *dev, struct sk_buff *skb)
4370 {
4371 struct cpl_set_tcb_rpl *rpl = cplhdr(skb);
4372
4373 if (rpl->status != CPL_ERR_NONE) {
4374 pr_err("Unexpected SET_TCB_RPL status %u for tid %u\n",
4375 rpl->status, GET_TID(rpl));
4376 }
4377 kfree_skb(skb);
4378 return 0;
4379 }
4380
fw6_msg(struct c4iw_dev * dev,struct sk_buff * skb)4381 static int fw6_msg(struct c4iw_dev *dev, struct sk_buff *skb)
4382 {
4383 struct cpl_fw6_msg *rpl = cplhdr(skb);
4384 struct c4iw_wr_wait *wr_waitp;
4385 int ret;
4386
4387 pr_debug("type %u\n", rpl->type);
4388
4389 switch (rpl->type) {
4390 case FW6_TYPE_WR_RPL:
4391 ret = (int)((be64_to_cpu(rpl->data[0]) >> 8) & 0xff);
4392 wr_waitp = (struct c4iw_wr_wait *)(__force unsigned long) rpl->data[1];
4393 pr_debug("wr_waitp %p ret %u\n", wr_waitp, ret);
4394 if (wr_waitp)
4395 c4iw_wake_up_deref(wr_waitp, ret ? -ret : 0);
4396 kfree_skb(skb);
4397 break;
4398 case FW6_TYPE_CQE:
4399 case FW6_TYPE_OFLD_CONNECTION_WR_RPL:
4400 sched(dev, skb);
4401 break;
4402 default:
4403 pr_err("%s unexpected fw6 msg type %u\n",
4404 __func__, rpl->type);
4405 kfree_skb(skb);
4406 break;
4407 }
4408 return 0;
4409 }
4410
peer_abort_intr(struct c4iw_dev * dev,struct sk_buff * skb)4411 static int peer_abort_intr(struct c4iw_dev *dev, struct sk_buff *skb)
4412 {
4413 struct cpl_abort_req_rss *req = cplhdr(skb);
4414 struct c4iw_ep *ep;
4415 unsigned int tid = GET_TID(req);
4416
4417 ep = get_ep_from_tid(dev, tid);
4418 /* This EP will be dereferenced in peer_abort() */
4419 if (!ep) {
4420 pr_warn("Abort on non-existent endpoint, tid %d\n", tid);
4421 kfree_skb(skb);
4422 return 0;
4423 }
4424 if (cxgb_is_neg_adv(req->status)) {
4425 pr_debug("Negative advice on abort- tid %u status %d (%s)\n",
4426 ep->hwtid, req->status,
4427 neg_adv_str(req->status));
4428 goto out;
4429 }
4430 pr_debug("ep %p tid %u state %u\n", ep, ep->hwtid, ep->com.state);
4431
4432 c4iw_wake_up_noref(ep->com.wr_waitp, -ECONNRESET);
4433 out:
4434 sched(dev, skb);
4435 return 0;
4436 }
4437
4438 /*
4439 * Most upcalls from the T4 Core go to sched() to
4440 * schedule the processing on a work queue.
4441 */
4442 c4iw_handler_func c4iw_handlers[NUM_CPL_CMDS] = {
4443 [CPL_ACT_ESTABLISH] = sched,
4444 [CPL_ACT_OPEN_RPL] = sched,
4445 [CPL_RX_DATA] = sched,
4446 [CPL_ABORT_RPL_RSS] = sched,
4447 [CPL_ABORT_RPL] = sched,
4448 [CPL_PASS_OPEN_RPL] = sched,
4449 [CPL_CLOSE_LISTSRV_RPL] = sched,
4450 [CPL_PASS_ACCEPT_REQ] = sched,
4451 [CPL_PASS_ESTABLISH] = sched,
4452 [CPL_PEER_CLOSE] = sched,
4453 [CPL_CLOSE_CON_RPL] = sched,
4454 [CPL_ABORT_REQ_RSS] = peer_abort_intr,
4455 [CPL_RDMA_TERMINATE] = sched,
4456 [CPL_FW4_ACK] = sched,
4457 [CPL_SET_TCB_RPL] = set_tcb_rpl,
4458 [CPL_GET_TCB_RPL] = sched,
4459 [CPL_FW6_MSG] = fw6_msg,
4460 [CPL_RX_PKT] = sched
4461 };
4462
c4iw_cm_init(void)4463 int __init c4iw_cm_init(void)
4464 {
4465 skb_queue_head_init(&rxq);
4466
4467 workq = alloc_ordered_workqueue("iw_cxgb4", WQ_MEM_RECLAIM);
4468 if (!workq)
4469 return -ENOMEM;
4470
4471 return 0;
4472 }
4473
c4iw_cm_term(void)4474 void c4iw_cm_term(void)
4475 {
4476 WARN_ON(!list_empty(&timeout_list));
4477 flush_workqueue(workq);
4478 destroy_workqueue(workq);
4479 }
4480