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 = (get_random_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 if (!ep)
1226 return -EINVAL;
1227
1228 pr_debug("ep %p tid %u snd_isn %u rcv_isn %u\n", ep, tid,
1229 be32_to_cpu(req->snd_isn), be32_to_cpu(req->rcv_isn));
1230
1231 mutex_lock(&ep->com.mutex);
1232 dst_confirm(ep->dst);
1233
1234 /* setup the hwtid for this connection */
1235 ep->hwtid = tid;
1236 cxgb4_insert_tid(t, ep, tid, ep->com.local_addr.ss_family);
1237 insert_ep_tid(ep);
1238
1239 ep->snd_seq = be32_to_cpu(req->snd_isn);
1240 ep->rcv_seq = be32_to_cpu(req->rcv_isn);
1241 ep->snd_wscale = TCPOPT_SND_WSCALE_G(tcp_opt);
1242
1243 set_emss(ep, tcp_opt);
1244
1245 /* dealloc the atid */
1246 xa_erase_irq(&ep->com.dev->atids, atid);
1247 cxgb4_free_atid(t, atid);
1248 set_bit(ACT_ESTAB, &ep->com.history);
1249
1250 /* start MPA negotiation */
1251 ret = send_flowc(ep);
1252 if (ret)
1253 goto err;
1254 if (ep->retry_with_mpa_v1)
1255 ret = send_mpa_req(ep, skb, 1);
1256 else
1257 ret = send_mpa_req(ep, skb, mpa_rev);
1258 if (ret)
1259 goto err;
1260 mutex_unlock(&ep->com.mutex);
1261 return 0;
1262 err:
1263 mutex_unlock(&ep->com.mutex);
1264 connect_reply_upcall(ep, -ENOMEM);
1265 c4iw_ep_disconnect(ep, 0, GFP_KERNEL);
1266 return 0;
1267 }
1268
close_complete_upcall(struct c4iw_ep * ep,int status)1269 static void close_complete_upcall(struct c4iw_ep *ep, int status)
1270 {
1271 struct iw_cm_event event;
1272
1273 pr_debug("ep %p tid %u\n", ep, ep->hwtid);
1274 memset(&event, 0, sizeof(event));
1275 event.event = IW_CM_EVENT_CLOSE;
1276 event.status = status;
1277 if (ep->com.cm_id) {
1278 pr_debug("close complete delivered ep %p cm_id %p tid %u\n",
1279 ep, ep->com.cm_id, ep->hwtid);
1280 ep->com.cm_id->event_handler(ep->com.cm_id, &event);
1281 deref_cm_id(&ep->com);
1282 set_bit(CLOSE_UPCALL, &ep->com.history);
1283 }
1284 }
1285
peer_close_upcall(struct c4iw_ep * ep)1286 static void peer_close_upcall(struct c4iw_ep *ep)
1287 {
1288 struct iw_cm_event event;
1289
1290 pr_debug("ep %p tid %u\n", ep, ep->hwtid);
1291 memset(&event, 0, sizeof(event));
1292 event.event = IW_CM_EVENT_DISCONNECT;
1293 if (ep->com.cm_id) {
1294 pr_debug("peer close delivered ep %p cm_id %p tid %u\n",
1295 ep, ep->com.cm_id, ep->hwtid);
1296 ep->com.cm_id->event_handler(ep->com.cm_id, &event);
1297 set_bit(DISCONN_UPCALL, &ep->com.history);
1298 }
1299 }
1300
peer_abort_upcall(struct c4iw_ep * ep)1301 static void peer_abort_upcall(struct c4iw_ep *ep)
1302 {
1303 struct iw_cm_event event;
1304
1305 pr_debug("ep %p tid %u\n", ep, ep->hwtid);
1306 memset(&event, 0, sizeof(event));
1307 event.event = IW_CM_EVENT_CLOSE;
1308 event.status = -ECONNRESET;
1309 if (ep->com.cm_id) {
1310 pr_debug("abort delivered ep %p cm_id %p tid %u\n", ep,
1311 ep->com.cm_id, ep->hwtid);
1312 ep->com.cm_id->event_handler(ep->com.cm_id, &event);
1313 deref_cm_id(&ep->com);
1314 set_bit(ABORT_UPCALL, &ep->com.history);
1315 }
1316 }
1317
connect_reply_upcall(struct c4iw_ep * ep,int status)1318 static void connect_reply_upcall(struct c4iw_ep *ep, int status)
1319 {
1320 struct iw_cm_event event;
1321
1322 pr_debug("ep %p tid %u status %d\n",
1323 ep, ep->hwtid, status);
1324 memset(&event, 0, sizeof(event));
1325 event.event = IW_CM_EVENT_CONNECT_REPLY;
1326 event.status = status;
1327 memcpy(&event.local_addr, &ep->com.local_addr,
1328 sizeof(ep->com.local_addr));
1329 memcpy(&event.remote_addr, &ep->com.remote_addr,
1330 sizeof(ep->com.remote_addr));
1331
1332 if ((status == 0) || (status == -ECONNREFUSED)) {
1333 if (!ep->tried_with_mpa_v1) {
1334 /* this means MPA_v2 is used */
1335 event.ord = ep->ird;
1336 event.ird = ep->ord;
1337 event.private_data_len = ep->plen -
1338 sizeof(struct mpa_v2_conn_params);
1339 event.private_data = ep->mpa_pkt +
1340 sizeof(struct mpa_message) +
1341 sizeof(struct mpa_v2_conn_params);
1342 } else {
1343 /* this means MPA_v1 is used */
1344 event.ord = cur_max_read_depth(ep->com.dev);
1345 event.ird = cur_max_read_depth(ep->com.dev);
1346 event.private_data_len = ep->plen;
1347 event.private_data = ep->mpa_pkt +
1348 sizeof(struct mpa_message);
1349 }
1350 }
1351
1352 pr_debug("ep %p tid %u status %d\n", ep,
1353 ep->hwtid, status);
1354 set_bit(CONN_RPL_UPCALL, &ep->com.history);
1355 ep->com.cm_id->event_handler(ep->com.cm_id, &event);
1356
1357 if (status < 0)
1358 deref_cm_id(&ep->com);
1359 }
1360
connect_request_upcall(struct c4iw_ep * ep)1361 static int connect_request_upcall(struct c4iw_ep *ep)
1362 {
1363 struct iw_cm_event event;
1364 int ret;
1365
1366 pr_debug("ep %p tid %u\n", ep, ep->hwtid);
1367 memset(&event, 0, sizeof(event));
1368 event.event = IW_CM_EVENT_CONNECT_REQUEST;
1369 memcpy(&event.local_addr, &ep->com.local_addr,
1370 sizeof(ep->com.local_addr));
1371 memcpy(&event.remote_addr, &ep->com.remote_addr,
1372 sizeof(ep->com.remote_addr));
1373 event.provider_data = ep;
1374 if (!ep->tried_with_mpa_v1) {
1375 /* this means MPA_v2 is used */
1376 event.ord = ep->ord;
1377 event.ird = ep->ird;
1378 event.private_data_len = ep->plen -
1379 sizeof(struct mpa_v2_conn_params);
1380 event.private_data = ep->mpa_pkt + sizeof(struct mpa_message) +
1381 sizeof(struct mpa_v2_conn_params);
1382 } else {
1383 /* this means MPA_v1 is used. Send max supported */
1384 event.ord = cur_max_read_depth(ep->com.dev);
1385 event.ird = cur_max_read_depth(ep->com.dev);
1386 event.private_data_len = ep->plen;
1387 event.private_data = ep->mpa_pkt + sizeof(struct mpa_message);
1388 }
1389 c4iw_get_ep(&ep->com);
1390 ret = ep->parent_ep->com.cm_id->event_handler(ep->parent_ep->com.cm_id,
1391 &event);
1392 if (ret)
1393 c4iw_put_ep(&ep->com);
1394 set_bit(CONNREQ_UPCALL, &ep->com.history);
1395 c4iw_put_ep(&ep->parent_ep->com);
1396 return ret;
1397 }
1398
established_upcall(struct c4iw_ep * ep)1399 static void established_upcall(struct c4iw_ep *ep)
1400 {
1401 struct iw_cm_event event;
1402
1403 pr_debug("ep %p tid %u\n", ep, ep->hwtid);
1404 memset(&event, 0, sizeof(event));
1405 event.event = IW_CM_EVENT_ESTABLISHED;
1406 event.ird = ep->ord;
1407 event.ord = ep->ird;
1408 if (ep->com.cm_id) {
1409 pr_debug("ep %p tid %u\n", ep, ep->hwtid);
1410 ep->com.cm_id->event_handler(ep->com.cm_id, &event);
1411 set_bit(ESTAB_UPCALL, &ep->com.history);
1412 }
1413 }
1414
update_rx_credits(struct c4iw_ep * ep,u32 credits)1415 static int update_rx_credits(struct c4iw_ep *ep, u32 credits)
1416 {
1417 struct sk_buff *skb;
1418 u32 wrlen = roundup(sizeof(struct cpl_rx_data_ack), 16);
1419 u32 credit_dack;
1420
1421 pr_debug("ep %p tid %u credits %u\n",
1422 ep, ep->hwtid, credits);
1423 skb = get_skb(NULL, wrlen, GFP_KERNEL);
1424 if (!skb) {
1425 pr_err("update_rx_credits - cannot alloc skb!\n");
1426 return 0;
1427 }
1428
1429 /*
1430 * If we couldn't specify the entire rcv window at connection setup
1431 * due to the limit in the number of bits in the RCV_BUFSIZ field,
1432 * then add the overage in to the credits returned.
1433 */
1434 if (ep->rcv_win > RCV_BUFSIZ_M * 1024)
1435 credits += ep->rcv_win - RCV_BUFSIZ_M * 1024;
1436
1437 credit_dack = credits | RX_FORCE_ACK_F | RX_DACK_CHANGE_F |
1438 RX_DACK_MODE_V(dack_mode);
1439
1440 cxgb_mk_rx_data_ack(skb, wrlen, ep->hwtid, ep->ctrlq_idx,
1441 credit_dack);
1442
1443 c4iw_ofld_send(&ep->com.dev->rdev, skb);
1444 return credits;
1445 }
1446
1447 #define RELAXED_IRD_NEGOTIATION 1
1448
1449 /*
1450 * process_mpa_reply - process streaming mode MPA reply
1451 *
1452 * Returns:
1453 *
1454 * 0 upon success indicating a connect request was delivered to the ULP
1455 * or the mpa request is incomplete but valid so far.
1456 *
1457 * 1 if a failure requires the caller to close the connection.
1458 *
1459 * 2 if a failure requires the caller to abort the connection.
1460 */
process_mpa_reply(struct c4iw_ep * ep,struct sk_buff * skb)1461 static int process_mpa_reply(struct c4iw_ep *ep, struct sk_buff *skb)
1462 {
1463 struct mpa_message *mpa;
1464 struct mpa_v2_conn_params *mpa_v2_params;
1465 u16 plen;
1466 u16 resp_ird, resp_ord;
1467 u8 rtr_mismatch = 0, insuff_ird = 0;
1468 struct c4iw_qp_attributes attrs;
1469 enum c4iw_qp_attr_mask mask;
1470 int err;
1471 int disconnect = 0;
1472
1473 pr_debug("ep %p tid %u\n", ep, ep->hwtid);
1474
1475 /*
1476 * If we get more than the supported amount of private data
1477 * then we must fail this connection.
1478 */
1479 if (ep->mpa_pkt_len + skb->len > sizeof(ep->mpa_pkt)) {
1480 err = -EINVAL;
1481 goto err_stop_timer;
1482 }
1483
1484 /*
1485 * copy the new data into our accumulation buffer.
1486 */
1487 skb_copy_from_linear_data(skb, &(ep->mpa_pkt[ep->mpa_pkt_len]),
1488 skb->len);
1489 ep->mpa_pkt_len += skb->len;
1490
1491 /*
1492 * if we don't even have the mpa message, then bail.
1493 */
1494 if (ep->mpa_pkt_len < sizeof(*mpa))
1495 return 0;
1496 mpa = (struct mpa_message *) ep->mpa_pkt;
1497
1498 /* Validate MPA header. */
1499 if (mpa->revision > mpa_rev) {
1500 pr_err("%s MPA version mismatch. Local = %d, Received = %d\n",
1501 __func__, mpa_rev, mpa->revision);
1502 err = -EPROTO;
1503 goto err_stop_timer;
1504 }
1505 if (memcmp(mpa->key, MPA_KEY_REP, sizeof(mpa->key))) {
1506 err = -EPROTO;
1507 goto err_stop_timer;
1508 }
1509
1510 plen = ntohs(mpa->private_data_size);
1511
1512 /*
1513 * Fail if there's too much private data.
1514 */
1515 if (plen > MPA_MAX_PRIVATE_DATA) {
1516 err = -EPROTO;
1517 goto err_stop_timer;
1518 }
1519
1520 /*
1521 * If plen does not account for pkt size
1522 */
1523 if (ep->mpa_pkt_len > (sizeof(*mpa) + plen)) {
1524 err = -EPROTO;
1525 goto err_stop_timer;
1526 }
1527
1528 ep->plen = (u8) plen;
1529
1530 /*
1531 * If we don't have all the pdata yet, then bail.
1532 * We'll continue process when more data arrives.
1533 */
1534 if (ep->mpa_pkt_len < (sizeof(*mpa) + plen))
1535 return 0;
1536
1537 if (mpa->flags & MPA_REJECT) {
1538 err = -ECONNREFUSED;
1539 goto err_stop_timer;
1540 }
1541
1542 /*
1543 * Stop mpa timer. If it expired, then
1544 * we ignore the MPA reply. process_timeout()
1545 * will abort the connection.
1546 */
1547 if (stop_ep_timer(ep))
1548 return 0;
1549
1550 /*
1551 * If we get here we have accumulated the entire mpa
1552 * start reply message including private data. And
1553 * the MPA header is valid.
1554 */
1555 __state_set(&ep->com, FPDU_MODE);
1556 ep->mpa_attr.crc_enabled = (mpa->flags & MPA_CRC) | crc_enabled ? 1 : 0;
1557 ep->mpa_attr.xmit_marker_enabled = mpa->flags & MPA_MARKERS ? 1 : 0;
1558 ep->mpa_attr.version = mpa->revision;
1559 ep->mpa_attr.p2p_type = FW_RI_INIT_P2PTYPE_DISABLED;
1560
1561 if (mpa->revision == 2) {
1562 ep->mpa_attr.enhanced_rdma_conn =
1563 mpa->flags & MPA_ENHANCED_RDMA_CONN ? 1 : 0;
1564 if (ep->mpa_attr.enhanced_rdma_conn) {
1565 mpa_v2_params = (struct mpa_v2_conn_params *)
1566 (ep->mpa_pkt + sizeof(*mpa));
1567 resp_ird = ntohs(mpa_v2_params->ird) &
1568 MPA_V2_IRD_ORD_MASK;
1569 resp_ord = ntohs(mpa_v2_params->ord) &
1570 MPA_V2_IRD_ORD_MASK;
1571 pr_debug("responder ird %u ord %u ep ird %u ord %u\n",
1572 resp_ird, resp_ord, ep->ird, ep->ord);
1573
1574 /*
1575 * This is a double-check. Ideally, below checks are
1576 * not required since ird/ord stuff has been taken
1577 * care of in c4iw_accept_cr
1578 */
1579 if (ep->ird < resp_ord) {
1580 if (RELAXED_IRD_NEGOTIATION && resp_ord <=
1581 ep->com.dev->rdev.lldi.max_ordird_qp)
1582 ep->ird = resp_ord;
1583 else
1584 insuff_ird = 1;
1585 } else if (ep->ird > resp_ord) {
1586 ep->ird = resp_ord;
1587 }
1588 if (ep->ord > resp_ird) {
1589 if (RELAXED_IRD_NEGOTIATION)
1590 ep->ord = resp_ird;
1591 else
1592 insuff_ird = 1;
1593 }
1594 if (insuff_ird) {
1595 err = -ENOMEM;
1596 ep->ird = resp_ord;
1597 ep->ord = resp_ird;
1598 }
1599
1600 if (ntohs(mpa_v2_params->ird) &
1601 MPA_V2_PEER2PEER_MODEL) {
1602 if (ntohs(mpa_v2_params->ord) &
1603 MPA_V2_RDMA_WRITE_RTR)
1604 ep->mpa_attr.p2p_type =
1605 FW_RI_INIT_P2PTYPE_RDMA_WRITE;
1606 else if (ntohs(mpa_v2_params->ord) &
1607 MPA_V2_RDMA_READ_RTR)
1608 ep->mpa_attr.p2p_type =
1609 FW_RI_INIT_P2PTYPE_READ_REQ;
1610 }
1611 }
1612 } else if (mpa->revision == 1)
1613 if (peer2peer)
1614 ep->mpa_attr.p2p_type = p2p_type;
1615
1616 pr_debug("crc_enabled=%d, recv_marker_enabled=%d, xmit_marker_enabled=%d, version=%d p2p_type=%d local-p2p_type = %d\n",
1617 ep->mpa_attr.crc_enabled,
1618 ep->mpa_attr.recv_marker_enabled,
1619 ep->mpa_attr.xmit_marker_enabled, ep->mpa_attr.version,
1620 ep->mpa_attr.p2p_type, p2p_type);
1621
1622 /*
1623 * If responder's RTR does not match with that of initiator, assign
1624 * FW_RI_INIT_P2PTYPE_DISABLED in mpa attributes so that RTR is not
1625 * generated when moving QP to RTS state.
1626 * A TERM message will be sent after QP has moved to RTS state
1627 */
1628 if ((ep->mpa_attr.version == 2) && peer2peer &&
1629 (ep->mpa_attr.p2p_type != p2p_type)) {
1630 ep->mpa_attr.p2p_type = FW_RI_INIT_P2PTYPE_DISABLED;
1631 rtr_mismatch = 1;
1632 }
1633
1634 attrs.mpa_attr = ep->mpa_attr;
1635 attrs.max_ird = ep->ird;
1636 attrs.max_ord = ep->ord;
1637 attrs.llp_stream_handle = ep;
1638 attrs.next_state = C4IW_QP_STATE_RTS;
1639
1640 mask = C4IW_QP_ATTR_NEXT_STATE |
1641 C4IW_QP_ATTR_LLP_STREAM_HANDLE | C4IW_QP_ATTR_MPA_ATTR |
1642 C4IW_QP_ATTR_MAX_IRD | C4IW_QP_ATTR_MAX_ORD;
1643
1644 /* bind QP and TID with INIT_WR */
1645 err = c4iw_modify_qp(ep->com.qp->rhp,
1646 ep->com.qp, mask, &attrs, 1);
1647 if (err)
1648 goto err;
1649
1650 /*
1651 * If responder's RTR requirement did not match with what initiator
1652 * supports, generate TERM message
1653 */
1654 if (rtr_mismatch) {
1655 pr_err("%s: RTR mismatch, sending TERM\n", __func__);
1656 attrs.layer_etype = LAYER_MPA | DDP_LLP;
1657 attrs.ecode = MPA_NOMATCH_RTR;
1658 attrs.next_state = C4IW_QP_STATE_TERMINATE;
1659 attrs.send_term = 1;
1660 err = c4iw_modify_qp(ep->com.qp->rhp, ep->com.qp,
1661 C4IW_QP_ATTR_NEXT_STATE, &attrs, 1);
1662 err = -ENOMEM;
1663 disconnect = 1;
1664 goto out;
1665 }
1666
1667 /*
1668 * Generate TERM if initiator IRD is not sufficient for responder
1669 * provided ORD. Currently, we do the same behaviour even when
1670 * responder provided IRD is also not sufficient as regards to
1671 * initiator ORD.
1672 */
1673 if (insuff_ird) {
1674 pr_err("%s: Insufficient IRD, sending TERM\n", __func__);
1675 attrs.layer_etype = LAYER_MPA | DDP_LLP;
1676 attrs.ecode = MPA_INSUFF_IRD;
1677 attrs.next_state = C4IW_QP_STATE_TERMINATE;
1678 attrs.send_term = 1;
1679 err = c4iw_modify_qp(ep->com.qp->rhp, ep->com.qp,
1680 C4IW_QP_ATTR_NEXT_STATE, &attrs, 1);
1681 err = -ENOMEM;
1682 disconnect = 1;
1683 goto out;
1684 }
1685 goto out;
1686 err_stop_timer:
1687 stop_ep_timer(ep);
1688 err:
1689 disconnect = 2;
1690 out:
1691 connect_reply_upcall(ep, err);
1692 return disconnect;
1693 }
1694
1695 /*
1696 * process_mpa_request - process streaming mode MPA request
1697 *
1698 * Returns:
1699 *
1700 * 0 upon success indicating a connect request was delivered to the ULP
1701 * or the mpa request is incomplete but valid so far.
1702 *
1703 * 1 if a failure requires the caller to close the connection.
1704 *
1705 * 2 if a failure requires the caller to abort the connection.
1706 */
process_mpa_request(struct c4iw_ep * ep,struct sk_buff * skb)1707 static int process_mpa_request(struct c4iw_ep *ep, struct sk_buff *skb)
1708 {
1709 struct mpa_message *mpa;
1710 struct mpa_v2_conn_params *mpa_v2_params;
1711 u16 plen;
1712
1713 pr_debug("ep %p tid %u\n", ep, ep->hwtid);
1714
1715 /*
1716 * If we get more than the supported amount of private data
1717 * then we must fail this connection.
1718 */
1719 if (ep->mpa_pkt_len + skb->len > sizeof(ep->mpa_pkt))
1720 goto err_stop_timer;
1721
1722 pr_debug("enter (%s line %u)\n", __FILE__, __LINE__);
1723
1724 /*
1725 * Copy the new data into our accumulation buffer.
1726 */
1727 skb_copy_from_linear_data(skb, &(ep->mpa_pkt[ep->mpa_pkt_len]),
1728 skb->len);
1729 ep->mpa_pkt_len += skb->len;
1730
1731 /*
1732 * If we don't even have the mpa message, then bail.
1733 * We'll continue process when more data arrives.
1734 */
1735 if (ep->mpa_pkt_len < sizeof(*mpa))
1736 return 0;
1737
1738 pr_debug("enter (%s line %u)\n", __FILE__, __LINE__);
1739 mpa = (struct mpa_message *) ep->mpa_pkt;
1740
1741 /*
1742 * Validate MPA Header.
1743 */
1744 if (mpa->revision > mpa_rev) {
1745 pr_err("%s MPA version mismatch. Local = %d, Received = %d\n",
1746 __func__, mpa_rev, mpa->revision);
1747 goto err_stop_timer;
1748 }
1749
1750 if (memcmp(mpa->key, MPA_KEY_REQ, sizeof(mpa->key)))
1751 goto err_stop_timer;
1752
1753 plen = ntohs(mpa->private_data_size);
1754
1755 /*
1756 * Fail if there's too much private data.
1757 */
1758 if (plen > MPA_MAX_PRIVATE_DATA)
1759 goto err_stop_timer;
1760
1761 /*
1762 * If plen does not account for pkt size
1763 */
1764 if (ep->mpa_pkt_len > (sizeof(*mpa) + plen))
1765 goto err_stop_timer;
1766 ep->plen = (u8) plen;
1767
1768 /*
1769 * If we don't have all the pdata yet, then bail.
1770 */
1771 if (ep->mpa_pkt_len < (sizeof(*mpa) + plen))
1772 return 0;
1773
1774 /*
1775 * If we get here we have accumulated the entire mpa
1776 * start reply message including private data.
1777 */
1778 ep->mpa_attr.initiator = 0;
1779 ep->mpa_attr.crc_enabled = (mpa->flags & MPA_CRC) | crc_enabled ? 1 : 0;
1780 ep->mpa_attr.recv_marker_enabled = markers_enabled;
1781 ep->mpa_attr.xmit_marker_enabled = mpa->flags & MPA_MARKERS ? 1 : 0;
1782 ep->mpa_attr.version = mpa->revision;
1783 if (mpa->revision == 1)
1784 ep->tried_with_mpa_v1 = 1;
1785 ep->mpa_attr.p2p_type = FW_RI_INIT_P2PTYPE_DISABLED;
1786
1787 if (mpa->revision == 2) {
1788 ep->mpa_attr.enhanced_rdma_conn =
1789 mpa->flags & MPA_ENHANCED_RDMA_CONN ? 1 : 0;
1790 if (ep->mpa_attr.enhanced_rdma_conn) {
1791 mpa_v2_params = (struct mpa_v2_conn_params *)
1792 (ep->mpa_pkt + sizeof(*mpa));
1793 ep->ird = ntohs(mpa_v2_params->ird) &
1794 MPA_V2_IRD_ORD_MASK;
1795 ep->ird = min_t(u32, ep->ird,
1796 cur_max_read_depth(ep->com.dev));
1797 ep->ord = ntohs(mpa_v2_params->ord) &
1798 MPA_V2_IRD_ORD_MASK;
1799 ep->ord = min_t(u32, ep->ord,
1800 cur_max_read_depth(ep->com.dev));
1801 pr_debug("initiator ird %u ord %u\n",
1802 ep->ird, ep->ord);
1803 if (ntohs(mpa_v2_params->ird) & MPA_V2_PEER2PEER_MODEL)
1804 if (peer2peer) {
1805 if (ntohs(mpa_v2_params->ord) &
1806 MPA_V2_RDMA_WRITE_RTR)
1807 ep->mpa_attr.p2p_type =
1808 FW_RI_INIT_P2PTYPE_RDMA_WRITE;
1809 else if (ntohs(mpa_v2_params->ord) &
1810 MPA_V2_RDMA_READ_RTR)
1811 ep->mpa_attr.p2p_type =
1812 FW_RI_INIT_P2PTYPE_READ_REQ;
1813 }
1814 }
1815 } else if (mpa->revision == 1)
1816 if (peer2peer)
1817 ep->mpa_attr.p2p_type = p2p_type;
1818
1819 pr_debug("crc_enabled=%d, recv_marker_enabled=%d, xmit_marker_enabled=%d, version=%d p2p_type=%d\n",
1820 ep->mpa_attr.crc_enabled, ep->mpa_attr.recv_marker_enabled,
1821 ep->mpa_attr.xmit_marker_enabled, ep->mpa_attr.version,
1822 ep->mpa_attr.p2p_type);
1823
1824 __state_set(&ep->com, MPA_REQ_RCVD);
1825
1826 /* drive upcall */
1827 mutex_lock_nested(&ep->parent_ep->com.mutex, SINGLE_DEPTH_NESTING);
1828 if (ep->parent_ep->com.state != DEAD) {
1829 if (connect_request_upcall(ep))
1830 goto err_unlock_parent;
1831 } else {
1832 goto err_unlock_parent;
1833 }
1834 mutex_unlock(&ep->parent_ep->com.mutex);
1835 return 0;
1836
1837 err_unlock_parent:
1838 mutex_unlock(&ep->parent_ep->com.mutex);
1839 goto err_out;
1840 err_stop_timer:
1841 (void)stop_ep_timer(ep);
1842 err_out:
1843 return 2;
1844 }
1845
rx_data(struct c4iw_dev * dev,struct sk_buff * skb)1846 static int rx_data(struct c4iw_dev *dev, struct sk_buff *skb)
1847 {
1848 struct c4iw_ep *ep;
1849 struct cpl_rx_data *hdr = cplhdr(skb);
1850 unsigned int dlen = ntohs(hdr->len);
1851 unsigned int tid = GET_TID(hdr);
1852 __u8 status = hdr->status;
1853 int disconnect = 0;
1854
1855 ep = get_ep_from_tid(dev, tid);
1856 if (!ep)
1857 return 0;
1858 pr_debug("ep %p tid %u dlen %u\n", ep, ep->hwtid, dlen);
1859 skb_pull(skb, sizeof(*hdr));
1860 skb_trim(skb, dlen);
1861 mutex_lock(&ep->com.mutex);
1862
1863 switch (ep->com.state) {
1864 case MPA_REQ_SENT:
1865 update_rx_credits(ep, dlen);
1866 ep->rcv_seq += dlen;
1867 disconnect = process_mpa_reply(ep, skb);
1868 break;
1869 case MPA_REQ_WAIT:
1870 update_rx_credits(ep, dlen);
1871 ep->rcv_seq += dlen;
1872 disconnect = process_mpa_request(ep, skb);
1873 break;
1874 case FPDU_MODE: {
1875 struct c4iw_qp_attributes attrs;
1876
1877 update_rx_credits(ep, dlen);
1878 if (status)
1879 pr_err("%s Unexpected streaming data." \
1880 " qpid %u ep %p state %d tid %u status %d\n",
1881 __func__, ep->com.qp->wq.sq.qid, ep,
1882 ep->com.state, ep->hwtid, status);
1883 attrs.next_state = C4IW_QP_STATE_TERMINATE;
1884 c4iw_modify_qp(ep->com.qp->rhp, ep->com.qp,
1885 C4IW_QP_ATTR_NEXT_STATE, &attrs, 1);
1886 disconnect = 1;
1887 break;
1888 }
1889 default:
1890 break;
1891 }
1892 mutex_unlock(&ep->com.mutex);
1893 if (disconnect)
1894 c4iw_ep_disconnect(ep, disconnect == 2, GFP_KERNEL);
1895 c4iw_put_ep(&ep->com);
1896 return 0;
1897 }
1898
complete_cached_srq_buffers(struct c4iw_ep * ep,u32 srqidx)1899 static void complete_cached_srq_buffers(struct c4iw_ep *ep, u32 srqidx)
1900 {
1901 enum chip_type adapter_type;
1902
1903 adapter_type = ep->com.dev->rdev.lldi.adapter_type;
1904
1905 /*
1906 * If this TCB had a srq buffer cached, then we must complete
1907 * it. For user mode, that means saving the srqidx in the
1908 * user/kernel status page for this qp. For kernel mode, just
1909 * synthesize the CQE now.
1910 */
1911 if (CHELSIO_CHIP_VERSION(adapter_type) > CHELSIO_T5 && srqidx) {
1912 if (ep->com.qp->ibqp.uobject)
1913 t4_set_wq_in_error(&ep->com.qp->wq, srqidx);
1914 else
1915 c4iw_flush_srqidx(ep->com.qp, srqidx);
1916 }
1917 }
1918
abort_rpl(struct c4iw_dev * dev,struct sk_buff * skb)1919 static int abort_rpl(struct c4iw_dev *dev, struct sk_buff *skb)
1920 {
1921 u32 srqidx;
1922 struct c4iw_ep *ep;
1923 struct cpl_abort_rpl_rss6 *rpl = cplhdr(skb);
1924 int release = 0;
1925 unsigned int tid = GET_TID(rpl);
1926
1927 ep = get_ep_from_tid(dev, tid);
1928 if (!ep) {
1929 pr_warn("Abort rpl to freed endpoint\n");
1930 return 0;
1931 }
1932
1933 if (ep->com.qp && ep->com.qp->srq) {
1934 srqidx = ABORT_RSS_SRQIDX_G(be32_to_cpu(rpl->srqidx_status));
1935 complete_cached_srq_buffers(ep, srqidx ? srqidx : ep->srqe_idx);
1936 }
1937
1938 pr_debug("ep %p tid %u\n", ep, ep->hwtid);
1939 mutex_lock(&ep->com.mutex);
1940 switch (ep->com.state) {
1941 case ABORTING:
1942 c4iw_wake_up_noref(ep->com.wr_waitp, -ECONNRESET);
1943 __state_set(&ep->com, DEAD);
1944 release = 1;
1945 break;
1946 default:
1947 pr_err("%s ep %p state %d\n", __func__, ep, ep->com.state);
1948 break;
1949 }
1950 mutex_unlock(&ep->com.mutex);
1951
1952 if (release) {
1953 close_complete_upcall(ep, -ECONNRESET);
1954 release_ep_resources(ep);
1955 }
1956 c4iw_put_ep(&ep->com);
1957 return 0;
1958 }
1959
send_fw_act_open_req(struct c4iw_ep * ep,unsigned int atid)1960 static int send_fw_act_open_req(struct c4iw_ep *ep, unsigned int atid)
1961 {
1962 struct sk_buff *skb;
1963 struct fw_ofld_connection_wr *req;
1964 unsigned int mtu_idx;
1965 u32 wscale;
1966 struct sockaddr_in *sin;
1967 int win;
1968
1969 skb = get_skb(NULL, sizeof(*req), GFP_KERNEL);
1970 if (!skb)
1971 return -ENOMEM;
1972
1973 req = __skb_put_zero(skb, sizeof(*req));
1974 req->op_compl = htonl(WR_OP_V(FW_OFLD_CONNECTION_WR));
1975 req->len16_pkd = htonl(FW_WR_LEN16_V(DIV_ROUND_UP(sizeof(*req), 16)));
1976 req->le.filter = cpu_to_be32(cxgb4_select_ntuple(
1977 ep->com.dev->rdev.lldi.ports[0],
1978 ep->l2t));
1979 sin = (struct sockaddr_in *)&ep->com.local_addr;
1980 req->le.lport = sin->sin_port;
1981 req->le.u.ipv4.lip = sin->sin_addr.s_addr;
1982 sin = (struct sockaddr_in *)&ep->com.remote_addr;
1983 req->le.pport = sin->sin_port;
1984 req->le.u.ipv4.pip = sin->sin_addr.s_addr;
1985 req->tcb.t_state_to_astid =
1986 htonl(FW_OFLD_CONNECTION_WR_T_STATE_V(TCP_SYN_SENT) |
1987 FW_OFLD_CONNECTION_WR_ASTID_V(atid));
1988 req->tcb.cplrxdataack_cplpassacceptrpl =
1989 htons(FW_OFLD_CONNECTION_WR_CPLRXDATAACK_F);
1990 req->tcb.tx_max = (__force __be32) jiffies;
1991 req->tcb.rcv_adv = htons(1);
1992 cxgb_best_mtu(ep->com.dev->rdev.lldi.mtus, ep->mtu, &mtu_idx,
1993 enable_tcp_timestamps,
1994 (ep->com.remote_addr.ss_family == AF_INET) ? 0 : 1);
1995 wscale = cxgb_compute_wscale(rcv_win);
1996
1997 /*
1998 * Specify the largest window that will fit in opt0. The
1999 * remainder will be specified in the rx_data_ack.
2000 */
2001 win = ep->rcv_win >> 10;
2002 if (win > RCV_BUFSIZ_M)
2003 win = RCV_BUFSIZ_M;
2004
2005 req->tcb.opt0 = (__force __be64) (TCAM_BYPASS_F |
2006 (nocong ? NO_CONG_F : 0) |
2007 KEEP_ALIVE_F |
2008 DELACK_F |
2009 WND_SCALE_V(wscale) |
2010 MSS_IDX_V(mtu_idx) |
2011 L2T_IDX_V(ep->l2t->idx) |
2012 TX_CHAN_V(ep->tx_chan) |
2013 SMAC_SEL_V(ep->smac_idx) |
2014 DSCP_V(ep->tos >> 2) |
2015 ULP_MODE_V(ULP_MODE_TCPDDP) |
2016 RCV_BUFSIZ_V(win));
2017 req->tcb.opt2 = (__force __be32) (PACE_V(1) |
2018 TX_QUEUE_V(ep->com.dev->rdev.lldi.tx_modq[ep->tx_chan]) |
2019 RX_CHANNEL_V(0) |
2020 CCTRL_ECN_V(enable_ecn) |
2021 RSS_QUEUE_VALID_F | RSS_QUEUE_V(ep->rss_qid));
2022 if (enable_tcp_timestamps)
2023 req->tcb.opt2 |= (__force __be32)TSTAMPS_EN_F;
2024 if (enable_tcp_sack)
2025 req->tcb.opt2 |= (__force __be32)SACK_EN_F;
2026 if (wscale && enable_tcp_window_scaling)
2027 req->tcb.opt2 |= (__force __be32)WND_SCALE_EN_F;
2028 req->tcb.opt0 = cpu_to_be64((__force u64)req->tcb.opt0);
2029 req->tcb.opt2 = cpu_to_be32((__force u32)req->tcb.opt2);
2030 set_wr_txq(skb, CPL_PRIORITY_CONTROL, ep->ctrlq_idx);
2031 set_bit(ACT_OFLD_CONN, &ep->com.history);
2032 return c4iw_l2t_send(&ep->com.dev->rdev, skb, ep->l2t);
2033 }
2034
2035 /*
2036 * Some of the error codes above implicitly indicate that there is no TID
2037 * allocated with the result of an ACT_OPEN. We use this predicate to make
2038 * that explicit.
2039 */
act_open_has_tid(int status)2040 static inline int act_open_has_tid(int status)
2041 {
2042 return (status != CPL_ERR_TCAM_PARITY &&
2043 status != CPL_ERR_TCAM_MISS &&
2044 status != CPL_ERR_TCAM_FULL &&
2045 status != CPL_ERR_CONN_EXIST_SYNRECV &&
2046 status != CPL_ERR_CONN_EXIST);
2047 }
2048
neg_adv_str(unsigned int status)2049 static char *neg_adv_str(unsigned int status)
2050 {
2051 switch (status) {
2052 case CPL_ERR_RTX_NEG_ADVICE:
2053 return "Retransmit timeout";
2054 case CPL_ERR_PERSIST_NEG_ADVICE:
2055 return "Persist timeout";
2056 case CPL_ERR_KEEPALV_NEG_ADVICE:
2057 return "Keepalive timeout";
2058 default:
2059 return "Unknown";
2060 }
2061 }
2062
set_tcp_window(struct c4iw_ep * ep,struct port_info * pi)2063 static void set_tcp_window(struct c4iw_ep *ep, struct port_info *pi)
2064 {
2065 ep->snd_win = snd_win;
2066 ep->rcv_win = rcv_win;
2067 pr_debug("snd_win %d rcv_win %d\n",
2068 ep->snd_win, ep->rcv_win);
2069 }
2070
2071 #define ACT_OPEN_RETRY_COUNT 2
2072
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)2073 static int import_ep(struct c4iw_ep *ep, int iptype, __u8 *peer_ip,
2074 struct dst_entry *dst, struct c4iw_dev *cdev,
2075 bool clear_mpa_v1, enum chip_type adapter_type, u8 tos)
2076 {
2077 struct neighbour *n;
2078 int err, step;
2079 struct net_device *pdev;
2080
2081 n = dst_neigh_lookup(dst, peer_ip);
2082 if (!n)
2083 return -ENODEV;
2084
2085 rcu_read_lock();
2086 err = -ENOMEM;
2087 if (n->dev->flags & IFF_LOOPBACK) {
2088 if (iptype == 4)
2089 pdev = ip_dev_find(&init_net, *(__be32 *)peer_ip);
2090 else if (IS_ENABLED(CONFIG_IPV6))
2091 for_each_netdev(&init_net, pdev) {
2092 if (ipv6_chk_addr(&init_net,
2093 (struct in6_addr *)peer_ip,
2094 pdev, 1))
2095 break;
2096 }
2097 else
2098 pdev = NULL;
2099
2100 if (!pdev) {
2101 err = -ENODEV;
2102 goto out;
2103 }
2104 ep->l2t = cxgb4_l2t_get(cdev->rdev.lldi.l2t,
2105 n, pdev, rt_tos2priority(tos));
2106 if (!ep->l2t) {
2107 dev_put(pdev);
2108 goto out;
2109 }
2110 ep->mtu = pdev->mtu;
2111 ep->tx_chan = cxgb4_port_chan(pdev);
2112 ep->smac_idx = ((struct port_info *)netdev_priv(pdev))->smt_idx;
2113 step = cdev->rdev.lldi.ntxq /
2114 cdev->rdev.lldi.nchan;
2115 ep->txq_idx = cxgb4_port_idx(pdev) * step;
2116 step = cdev->rdev.lldi.nrxq /
2117 cdev->rdev.lldi.nchan;
2118 ep->ctrlq_idx = cxgb4_port_idx(pdev);
2119 ep->rss_qid = cdev->rdev.lldi.rxq_ids[
2120 cxgb4_port_idx(pdev) * step];
2121 set_tcp_window(ep, (struct port_info *)netdev_priv(pdev));
2122 dev_put(pdev);
2123 } else {
2124 pdev = get_real_dev(n->dev);
2125 ep->l2t = cxgb4_l2t_get(cdev->rdev.lldi.l2t,
2126 n, pdev, rt_tos2priority(tos));
2127 if (!ep->l2t)
2128 goto out;
2129 ep->mtu = dst_mtu(dst);
2130 ep->tx_chan = cxgb4_port_chan(pdev);
2131 ep->smac_idx = ((struct port_info *)netdev_priv(pdev))->smt_idx;
2132 step = cdev->rdev.lldi.ntxq /
2133 cdev->rdev.lldi.nchan;
2134 ep->txq_idx = cxgb4_port_idx(pdev) * step;
2135 ep->ctrlq_idx = cxgb4_port_idx(pdev);
2136 step = cdev->rdev.lldi.nrxq /
2137 cdev->rdev.lldi.nchan;
2138 ep->rss_qid = cdev->rdev.lldi.rxq_ids[
2139 cxgb4_port_idx(pdev) * step];
2140 set_tcp_window(ep, (struct port_info *)netdev_priv(pdev));
2141
2142 if (clear_mpa_v1) {
2143 ep->retry_with_mpa_v1 = 0;
2144 ep->tried_with_mpa_v1 = 0;
2145 }
2146 }
2147 err = 0;
2148 out:
2149 rcu_read_unlock();
2150
2151 neigh_release(n);
2152
2153 return err;
2154 }
2155
c4iw_reconnect(struct c4iw_ep * ep)2156 static int c4iw_reconnect(struct c4iw_ep *ep)
2157 {
2158 int err = 0;
2159 int size = 0;
2160 struct sockaddr_in *laddr = (struct sockaddr_in *)
2161 &ep->com.cm_id->m_local_addr;
2162 struct sockaddr_in *raddr = (struct sockaddr_in *)
2163 &ep->com.cm_id->m_remote_addr;
2164 struct sockaddr_in6 *laddr6 = (struct sockaddr_in6 *)
2165 &ep->com.cm_id->m_local_addr;
2166 struct sockaddr_in6 *raddr6 = (struct sockaddr_in6 *)
2167 &ep->com.cm_id->m_remote_addr;
2168 int iptype;
2169 __u8 *ra;
2170
2171 pr_debug("qp %p cm_id %p\n", ep->com.qp, ep->com.cm_id);
2172 c4iw_init_wr_wait(ep->com.wr_waitp);
2173
2174 /* When MPA revision is different on nodes, the node with MPA_rev=2
2175 * tries to reconnect with MPA_rev 1 for the same EP through
2176 * c4iw_reconnect(), where the same EP is assigned with new tid for
2177 * further connection establishment. As we are using the same EP pointer
2178 * for reconnect, few skbs are used during the previous c4iw_connect(),
2179 * which leaves the EP with inadequate skbs for further
2180 * c4iw_reconnect(), Further causing a crash due to an empty
2181 * skb_list() during peer_abort(). Allocate skbs which is already used.
2182 */
2183 size = (CN_MAX_CON_BUF - skb_queue_len(&ep->com.ep_skb_list));
2184 if (alloc_ep_skb_list(&ep->com.ep_skb_list, size)) {
2185 err = -ENOMEM;
2186 goto fail1;
2187 }
2188
2189 /*
2190 * Allocate an active TID to initiate a TCP connection.
2191 */
2192 ep->atid = cxgb4_alloc_atid(ep->com.dev->rdev.lldi.tids, ep);
2193 if (ep->atid == -1) {
2194 pr_err("%s - cannot alloc atid\n", __func__);
2195 err = -ENOMEM;
2196 goto fail2;
2197 }
2198 err = xa_insert_irq(&ep->com.dev->atids, ep->atid, ep, GFP_KERNEL);
2199 if (err)
2200 goto fail2a;
2201
2202 /* find a route */
2203 if (ep->com.cm_id->m_local_addr.ss_family == AF_INET) {
2204 ep->dst = cxgb_find_route(&ep->com.dev->rdev.lldi, get_real_dev,
2205 laddr->sin_addr.s_addr,
2206 raddr->sin_addr.s_addr,
2207 laddr->sin_port,
2208 raddr->sin_port, ep->com.cm_id->tos);
2209 iptype = 4;
2210 ra = (__u8 *)&raddr->sin_addr;
2211 } else {
2212 ep->dst = cxgb_find_route6(&ep->com.dev->rdev.lldi,
2213 get_real_dev,
2214 laddr6->sin6_addr.s6_addr,
2215 raddr6->sin6_addr.s6_addr,
2216 laddr6->sin6_port,
2217 raddr6->sin6_port,
2218 ep->com.cm_id->tos,
2219 raddr6->sin6_scope_id);
2220 iptype = 6;
2221 ra = (__u8 *)&raddr6->sin6_addr;
2222 }
2223 if (!ep->dst) {
2224 pr_err("%s - cannot find route\n", __func__);
2225 err = -EHOSTUNREACH;
2226 goto fail3;
2227 }
2228 err = import_ep(ep, iptype, ra, ep->dst, ep->com.dev, false,
2229 ep->com.dev->rdev.lldi.adapter_type,
2230 ep->com.cm_id->tos);
2231 if (err) {
2232 pr_err("%s - cannot alloc l2e\n", __func__);
2233 goto fail4;
2234 }
2235
2236 pr_debug("txq_idx %u tx_chan %u smac_idx %u rss_qid %u l2t_idx %u\n",
2237 ep->txq_idx, ep->tx_chan, ep->smac_idx, ep->rss_qid,
2238 ep->l2t->idx);
2239
2240 state_set(&ep->com, CONNECTING);
2241 ep->tos = ep->com.cm_id->tos;
2242
2243 /* send connect request to rnic */
2244 err = send_connect(ep);
2245 if (!err)
2246 goto out;
2247
2248 cxgb4_l2t_release(ep->l2t);
2249 fail4:
2250 dst_release(ep->dst);
2251 fail3:
2252 xa_erase_irq(&ep->com.dev->atids, ep->atid);
2253 fail2a:
2254 cxgb4_free_atid(ep->com.dev->rdev.lldi.tids, ep->atid);
2255 fail2:
2256 /*
2257 * remember to send notification to upper layer.
2258 * We are in here so the upper layer is not aware that this is
2259 * re-connect attempt and so, upper layer is still waiting for
2260 * response of 1st connect request.
2261 */
2262 connect_reply_upcall(ep, -ECONNRESET);
2263 fail1:
2264 c4iw_put_ep(&ep->com);
2265 out:
2266 return err;
2267 }
2268
act_open_rpl(struct c4iw_dev * dev,struct sk_buff * skb)2269 static int act_open_rpl(struct c4iw_dev *dev, struct sk_buff *skb)
2270 {
2271 struct c4iw_ep *ep;
2272 struct cpl_act_open_rpl *rpl = cplhdr(skb);
2273 unsigned int atid = TID_TID_G(AOPEN_ATID_G(
2274 ntohl(rpl->atid_status)));
2275 struct tid_info *t = dev->rdev.lldi.tids;
2276 int status = AOPEN_STATUS_G(ntohl(rpl->atid_status));
2277 struct sockaddr_in *la;
2278 struct sockaddr_in *ra;
2279 struct sockaddr_in6 *la6;
2280 struct sockaddr_in6 *ra6;
2281 int ret = 0;
2282
2283 ep = lookup_atid(t, atid);
2284 if (!ep)
2285 return -EINVAL;
2286
2287 la = (struct sockaddr_in *)&ep->com.local_addr;
2288 ra = (struct sockaddr_in *)&ep->com.remote_addr;
2289 la6 = (struct sockaddr_in6 *)&ep->com.local_addr;
2290 ra6 = (struct sockaddr_in6 *)&ep->com.remote_addr;
2291
2292 pr_debug("ep %p atid %u status %u errno %d\n", ep, atid,
2293 status, status2errno(status));
2294
2295 if (cxgb_is_neg_adv(status)) {
2296 pr_debug("Connection problems for atid %u status %u (%s)\n",
2297 atid, status, neg_adv_str(status));
2298 ep->stats.connect_neg_adv++;
2299 mutex_lock(&dev->rdev.stats.lock);
2300 dev->rdev.stats.neg_adv++;
2301 mutex_unlock(&dev->rdev.stats.lock);
2302 return 0;
2303 }
2304
2305 set_bit(ACT_OPEN_RPL, &ep->com.history);
2306
2307 /*
2308 * Log interesting failures.
2309 */
2310 switch (status) {
2311 case CPL_ERR_CONN_RESET:
2312 case CPL_ERR_CONN_TIMEDOUT:
2313 break;
2314 case CPL_ERR_TCAM_FULL:
2315 mutex_lock(&dev->rdev.stats.lock);
2316 dev->rdev.stats.tcam_full++;
2317 mutex_unlock(&dev->rdev.stats.lock);
2318 if (ep->com.local_addr.ss_family == AF_INET &&
2319 dev->rdev.lldi.enable_fw_ofld_conn) {
2320 ret = send_fw_act_open_req(ep, TID_TID_G(AOPEN_ATID_G(
2321 ntohl(rpl->atid_status))));
2322 if (ret)
2323 goto fail;
2324 return 0;
2325 }
2326 break;
2327 case CPL_ERR_CONN_EXIST:
2328 if (ep->retry_count++ < ACT_OPEN_RETRY_COUNT) {
2329 set_bit(ACT_RETRY_INUSE, &ep->com.history);
2330 if (ep->com.remote_addr.ss_family == AF_INET6) {
2331 struct sockaddr_in6 *sin6 =
2332 (struct sockaddr_in6 *)
2333 &ep->com.local_addr;
2334 cxgb4_clip_release(
2335 ep->com.dev->rdev.lldi.ports[0],
2336 (const u32 *)
2337 &sin6->sin6_addr.s6_addr, 1);
2338 }
2339 xa_erase_irq(&ep->com.dev->atids, atid);
2340 cxgb4_free_atid(t, atid);
2341 dst_release(ep->dst);
2342 cxgb4_l2t_release(ep->l2t);
2343 c4iw_reconnect(ep);
2344 return 0;
2345 }
2346 break;
2347 default:
2348 if (ep->com.local_addr.ss_family == AF_INET) {
2349 pr_info("Active open failure - atid %u status %u errno %d %pI4:%u->%pI4:%u\n",
2350 atid, status, status2errno(status),
2351 &la->sin_addr.s_addr, ntohs(la->sin_port),
2352 &ra->sin_addr.s_addr, ntohs(ra->sin_port));
2353 } else {
2354 pr_info("Active open failure - atid %u status %u errno %d %pI6:%u->%pI6:%u\n",
2355 atid, status, status2errno(status),
2356 la6->sin6_addr.s6_addr, ntohs(la6->sin6_port),
2357 ra6->sin6_addr.s6_addr, ntohs(ra6->sin6_port));
2358 }
2359 break;
2360 }
2361
2362 fail:
2363 connect_reply_upcall(ep, status2errno(status));
2364 state_set(&ep->com, DEAD);
2365
2366 if (ep->com.remote_addr.ss_family == AF_INET6) {
2367 struct sockaddr_in6 *sin6 =
2368 (struct sockaddr_in6 *)&ep->com.local_addr;
2369 cxgb4_clip_release(ep->com.dev->rdev.lldi.ports[0],
2370 (const u32 *)&sin6->sin6_addr.s6_addr, 1);
2371 }
2372 if (status && act_open_has_tid(status))
2373 cxgb4_remove_tid(ep->com.dev->rdev.lldi.tids, 0, GET_TID(rpl),
2374 ep->com.local_addr.ss_family);
2375
2376 xa_erase_irq(&ep->com.dev->atids, atid);
2377 cxgb4_free_atid(t, atid);
2378 dst_release(ep->dst);
2379 cxgb4_l2t_release(ep->l2t);
2380 c4iw_put_ep(&ep->com);
2381
2382 return 0;
2383 }
2384
pass_open_rpl(struct c4iw_dev * dev,struct sk_buff * skb)2385 static int pass_open_rpl(struct c4iw_dev *dev, struct sk_buff *skb)
2386 {
2387 struct cpl_pass_open_rpl *rpl = cplhdr(skb);
2388 unsigned int stid = GET_TID(rpl);
2389 struct c4iw_listen_ep *ep = get_ep_from_stid(dev, stid);
2390
2391 if (!ep) {
2392 pr_warn("%s stid %d lookup failure!\n", __func__, stid);
2393 goto out;
2394 }
2395 pr_debug("ep %p status %d error %d\n", ep,
2396 rpl->status, status2errno(rpl->status));
2397 c4iw_wake_up_noref(ep->com.wr_waitp, status2errno(rpl->status));
2398 c4iw_put_ep(&ep->com);
2399 out:
2400 return 0;
2401 }
2402
close_listsrv_rpl(struct c4iw_dev * dev,struct sk_buff * skb)2403 static int close_listsrv_rpl(struct c4iw_dev *dev, struct sk_buff *skb)
2404 {
2405 struct cpl_close_listsvr_rpl *rpl = cplhdr(skb);
2406 unsigned int stid = GET_TID(rpl);
2407 struct c4iw_listen_ep *ep = get_ep_from_stid(dev, stid);
2408
2409 if (!ep) {
2410 pr_warn("%s stid %d lookup failure!\n", __func__, stid);
2411 goto out;
2412 }
2413 pr_debug("ep %p\n", ep);
2414 c4iw_wake_up_noref(ep->com.wr_waitp, status2errno(rpl->status));
2415 c4iw_put_ep(&ep->com);
2416 out:
2417 return 0;
2418 }
2419
accept_cr(struct c4iw_ep * ep,struct sk_buff * skb,struct cpl_pass_accept_req * req)2420 static int accept_cr(struct c4iw_ep *ep, struct sk_buff *skb,
2421 struct cpl_pass_accept_req *req)
2422 {
2423 struct cpl_pass_accept_rpl *rpl;
2424 unsigned int mtu_idx;
2425 u64 opt0;
2426 u32 opt2;
2427 u32 wscale;
2428 struct cpl_t5_pass_accept_rpl *rpl5 = NULL;
2429 int win;
2430 enum chip_type adapter_type = ep->com.dev->rdev.lldi.adapter_type;
2431
2432 pr_debug("ep %p tid %u\n", ep, ep->hwtid);
2433 cxgb_best_mtu(ep->com.dev->rdev.lldi.mtus, ep->mtu, &mtu_idx,
2434 enable_tcp_timestamps && req->tcpopt.tstamp,
2435 (ep->com.remote_addr.ss_family == AF_INET) ? 0 : 1);
2436 wscale = cxgb_compute_wscale(rcv_win);
2437
2438 /*
2439 * Specify the largest window that will fit in opt0. The
2440 * remainder will be specified in the rx_data_ack.
2441 */
2442 win = ep->rcv_win >> 10;
2443 if (win > RCV_BUFSIZ_M)
2444 win = RCV_BUFSIZ_M;
2445 opt0 = (nocong ? NO_CONG_F : 0) |
2446 KEEP_ALIVE_F |
2447 DELACK_F |
2448 WND_SCALE_V(wscale) |
2449 MSS_IDX_V(mtu_idx) |
2450 L2T_IDX_V(ep->l2t->idx) |
2451 TX_CHAN_V(ep->tx_chan) |
2452 SMAC_SEL_V(ep->smac_idx) |
2453 DSCP_V(ep->tos >> 2) |
2454 ULP_MODE_V(ULP_MODE_TCPDDP) |
2455 RCV_BUFSIZ_V(win);
2456 opt2 = RX_CHANNEL_V(0) |
2457 RSS_QUEUE_VALID_F | RSS_QUEUE_V(ep->rss_qid);
2458
2459 if (enable_tcp_timestamps && req->tcpopt.tstamp)
2460 opt2 |= TSTAMPS_EN_F;
2461 if (enable_tcp_sack && req->tcpopt.sack)
2462 opt2 |= SACK_EN_F;
2463 if (wscale && enable_tcp_window_scaling)
2464 opt2 |= WND_SCALE_EN_F;
2465 if (enable_ecn) {
2466 const struct tcphdr *tcph;
2467 u32 hlen = ntohl(req->hdr_len);
2468
2469 if (CHELSIO_CHIP_VERSION(adapter_type) <= CHELSIO_T5)
2470 tcph = (const void *)(req + 1) + ETH_HDR_LEN_G(hlen) +
2471 IP_HDR_LEN_G(hlen);
2472 else
2473 tcph = (const void *)(req + 1) +
2474 T6_ETH_HDR_LEN_G(hlen) + T6_IP_HDR_LEN_G(hlen);
2475 if (tcph->ece && tcph->cwr)
2476 opt2 |= CCTRL_ECN_V(1);
2477 }
2478
2479 if (!is_t4(adapter_type)) {
2480 u32 isn = (get_random_u32() & ~7UL) - 1;
2481
2482 skb = get_skb(skb, roundup(sizeof(*rpl5), 16), GFP_KERNEL);
2483 rpl5 = __skb_put_zero(skb, roundup(sizeof(*rpl5), 16));
2484 rpl = (void *)rpl5;
2485 INIT_TP_WR_CPL(rpl5, CPL_PASS_ACCEPT_RPL, ep->hwtid);
2486 opt2 |= T5_OPT_2_VALID_F;
2487 opt2 |= CONG_CNTRL_V(CONG_ALG_TAHOE);
2488 opt2 |= T5_ISS_F;
2489 if (peer2peer)
2490 isn += 4;
2491 rpl5->iss = cpu_to_be32(isn);
2492 pr_debug("iss %u\n", be32_to_cpu(rpl5->iss));
2493 } else {
2494 skb = get_skb(skb, sizeof(*rpl), GFP_KERNEL);
2495 rpl = __skb_put_zero(skb, sizeof(*rpl));
2496 INIT_TP_WR_CPL(rpl, CPL_PASS_ACCEPT_RPL, ep->hwtid);
2497 }
2498
2499 rpl->opt0 = cpu_to_be64(opt0);
2500 rpl->opt2 = cpu_to_be32(opt2);
2501 set_wr_txq(skb, CPL_PRIORITY_SETUP, ep->ctrlq_idx);
2502 t4_set_arp_err_handler(skb, ep, pass_accept_rpl_arp_failure);
2503
2504 return c4iw_l2t_send(&ep->com.dev->rdev, skb, ep->l2t);
2505 }
2506
reject_cr(struct c4iw_dev * dev,u32 hwtid,struct sk_buff * skb)2507 static void reject_cr(struct c4iw_dev *dev, u32 hwtid, struct sk_buff *skb)
2508 {
2509 pr_debug("c4iw_dev %p tid %u\n", dev, hwtid);
2510 skb_trim(skb, sizeof(struct cpl_tid_release));
2511 release_tid(&dev->rdev, hwtid, skb);
2512 return;
2513 }
2514
pass_accept_req(struct c4iw_dev * dev,struct sk_buff * skb)2515 static int pass_accept_req(struct c4iw_dev *dev, struct sk_buff *skb)
2516 {
2517 struct c4iw_ep *child_ep = NULL, *parent_ep;
2518 struct cpl_pass_accept_req *req = cplhdr(skb);
2519 unsigned int stid = PASS_OPEN_TID_G(ntohl(req->tos_stid));
2520 struct tid_info *t = dev->rdev.lldi.tids;
2521 unsigned int hwtid = GET_TID(req);
2522 struct dst_entry *dst;
2523 __u8 local_ip[16], peer_ip[16];
2524 __be16 local_port, peer_port;
2525 struct sockaddr_in6 *sin6;
2526 int err;
2527 u16 peer_mss = ntohs(req->tcpopt.mss);
2528 int iptype;
2529 unsigned short hdrs;
2530 u8 tos;
2531
2532 parent_ep = (struct c4iw_ep *)get_ep_from_stid(dev, stid);
2533 if (!parent_ep) {
2534 pr_err("%s connect request on invalid stid %d\n",
2535 __func__, stid);
2536 goto reject;
2537 }
2538
2539 if (state_read(&parent_ep->com) != LISTEN) {
2540 pr_err("%s - listening ep not in LISTEN\n", __func__);
2541 goto reject;
2542 }
2543
2544 if (parent_ep->com.cm_id->tos_set)
2545 tos = parent_ep->com.cm_id->tos;
2546 else
2547 tos = PASS_OPEN_TOS_G(ntohl(req->tos_stid));
2548
2549 cxgb_get_4tuple(req, parent_ep->com.dev->rdev.lldi.adapter_type,
2550 &iptype, local_ip, peer_ip, &local_port, &peer_port);
2551
2552 /* Find output route */
2553 if (iptype == 4) {
2554 pr_debug("parent ep %p hwtid %u laddr %pI4 raddr %pI4 lport %d rport %d peer_mss %d\n"
2555 , parent_ep, hwtid,
2556 local_ip, peer_ip, ntohs(local_port),
2557 ntohs(peer_port), peer_mss);
2558 dst = cxgb_find_route(&dev->rdev.lldi, get_real_dev,
2559 *(__be32 *)local_ip, *(__be32 *)peer_ip,
2560 local_port, peer_port, tos);
2561 } else {
2562 pr_debug("parent ep %p hwtid %u laddr %pI6 raddr %pI6 lport %d rport %d peer_mss %d\n"
2563 , parent_ep, hwtid,
2564 local_ip, peer_ip, ntohs(local_port),
2565 ntohs(peer_port), peer_mss);
2566 dst = cxgb_find_route6(&dev->rdev.lldi, get_real_dev,
2567 local_ip, peer_ip, local_port, peer_port,
2568 tos,
2569 ((struct sockaddr_in6 *)
2570 &parent_ep->com.local_addr)->sin6_scope_id);
2571 }
2572 if (!dst) {
2573 pr_err("%s - failed to find dst entry!\n", __func__);
2574 goto reject;
2575 }
2576
2577 child_ep = alloc_ep(sizeof(*child_ep), GFP_KERNEL);
2578 if (!child_ep) {
2579 pr_err("%s - failed to allocate ep entry!\n", __func__);
2580 dst_release(dst);
2581 goto reject;
2582 }
2583
2584 err = import_ep(child_ep, iptype, peer_ip, dst, dev, false,
2585 parent_ep->com.dev->rdev.lldi.adapter_type, tos);
2586 if (err) {
2587 pr_err("%s - failed to allocate l2t entry!\n", __func__);
2588 dst_release(dst);
2589 kfree(child_ep);
2590 goto reject;
2591 }
2592
2593 hdrs = ((iptype == 4) ? sizeof(struct iphdr) : sizeof(struct ipv6hdr)) +
2594 sizeof(struct tcphdr) +
2595 ((enable_tcp_timestamps && req->tcpopt.tstamp) ? 12 : 0);
2596 if (peer_mss && child_ep->mtu > (peer_mss + hdrs))
2597 child_ep->mtu = peer_mss + hdrs;
2598
2599 skb_queue_head_init(&child_ep->com.ep_skb_list);
2600 if (alloc_ep_skb_list(&child_ep->com.ep_skb_list, CN_MAX_CON_BUF))
2601 goto fail;
2602
2603 state_set(&child_ep->com, CONNECTING);
2604 child_ep->com.dev = dev;
2605 child_ep->com.cm_id = NULL;
2606
2607 if (iptype == 4) {
2608 struct sockaddr_in *sin = (struct sockaddr_in *)
2609 &child_ep->com.local_addr;
2610
2611 sin->sin_family = AF_INET;
2612 sin->sin_port = local_port;
2613 sin->sin_addr.s_addr = *(__be32 *)local_ip;
2614
2615 sin = (struct sockaddr_in *)&child_ep->com.local_addr;
2616 sin->sin_family = AF_INET;
2617 sin->sin_port = ((struct sockaddr_in *)
2618 &parent_ep->com.local_addr)->sin_port;
2619 sin->sin_addr.s_addr = *(__be32 *)local_ip;
2620
2621 sin = (struct sockaddr_in *)&child_ep->com.remote_addr;
2622 sin->sin_family = AF_INET;
2623 sin->sin_port = peer_port;
2624 sin->sin_addr.s_addr = *(__be32 *)peer_ip;
2625 } else {
2626 sin6 = (struct sockaddr_in6 *)&child_ep->com.local_addr;
2627 sin6->sin6_family = PF_INET6;
2628 sin6->sin6_port = local_port;
2629 memcpy(sin6->sin6_addr.s6_addr, local_ip, 16);
2630
2631 sin6 = (struct sockaddr_in6 *)&child_ep->com.local_addr;
2632 sin6->sin6_family = PF_INET6;
2633 sin6->sin6_port = ((struct sockaddr_in6 *)
2634 &parent_ep->com.local_addr)->sin6_port;
2635 memcpy(sin6->sin6_addr.s6_addr, local_ip, 16);
2636
2637 sin6 = (struct sockaddr_in6 *)&child_ep->com.remote_addr;
2638 sin6->sin6_family = PF_INET6;
2639 sin6->sin6_port = peer_port;
2640 memcpy(sin6->sin6_addr.s6_addr, peer_ip, 16);
2641 }
2642
2643 c4iw_get_ep(&parent_ep->com);
2644 child_ep->parent_ep = parent_ep;
2645 child_ep->tos = tos;
2646 child_ep->dst = dst;
2647 child_ep->hwtid = hwtid;
2648
2649 pr_debug("tx_chan %u smac_idx %u rss_qid %u\n",
2650 child_ep->tx_chan, child_ep->smac_idx, child_ep->rss_qid);
2651
2652 timer_setup(&child_ep->timer, ep_timeout, 0);
2653 cxgb4_insert_tid(t, child_ep, hwtid,
2654 child_ep->com.local_addr.ss_family);
2655 insert_ep_tid(child_ep);
2656 if (accept_cr(child_ep, skb, req)) {
2657 c4iw_put_ep(&parent_ep->com);
2658 release_ep_resources(child_ep);
2659 } else {
2660 set_bit(PASS_ACCEPT_REQ, &child_ep->com.history);
2661 }
2662 if (iptype == 6) {
2663 sin6 = (struct sockaddr_in6 *)&child_ep->com.local_addr;
2664 cxgb4_clip_get(child_ep->com.dev->rdev.lldi.ports[0],
2665 (const u32 *)&sin6->sin6_addr.s6_addr, 1);
2666 }
2667 goto out;
2668 fail:
2669 c4iw_put_ep(&child_ep->com);
2670 reject:
2671 reject_cr(dev, hwtid, skb);
2672 out:
2673 if (parent_ep)
2674 c4iw_put_ep(&parent_ep->com);
2675 return 0;
2676 }
2677
pass_establish(struct c4iw_dev * dev,struct sk_buff * skb)2678 static int pass_establish(struct c4iw_dev *dev, struct sk_buff *skb)
2679 {
2680 struct c4iw_ep *ep;
2681 struct cpl_pass_establish *req = cplhdr(skb);
2682 unsigned int tid = GET_TID(req);
2683 int ret;
2684 u16 tcp_opt = ntohs(req->tcp_opt);
2685
2686 ep = get_ep_from_tid(dev, tid);
2687 if (!ep)
2688 return 0;
2689
2690 pr_debug("ep %p tid %u\n", ep, ep->hwtid);
2691 ep->snd_seq = be32_to_cpu(req->snd_isn);
2692 ep->rcv_seq = be32_to_cpu(req->rcv_isn);
2693 ep->snd_wscale = TCPOPT_SND_WSCALE_G(tcp_opt);
2694
2695 pr_debug("ep %p hwtid %u tcp_opt 0x%02x\n", ep, tid, tcp_opt);
2696
2697 set_emss(ep, tcp_opt);
2698
2699 dst_confirm(ep->dst);
2700 mutex_lock(&ep->com.mutex);
2701 ep->com.state = MPA_REQ_WAIT;
2702 start_ep_timer(ep);
2703 set_bit(PASS_ESTAB, &ep->com.history);
2704 ret = send_flowc(ep);
2705 mutex_unlock(&ep->com.mutex);
2706 if (ret)
2707 c4iw_ep_disconnect(ep, 1, GFP_KERNEL);
2708 c4iw_put_ep(&ep->com);
2709
2710 return 0;
2711 }
2712
peer_close(struct c4iw_dev * dev,struct sk_buff * skb)2713 static int peer_close(struct c4iw_dev *dev, struct sk_buff *skb)
2714 {
2715 struct cpl_peer_close *hdr = cplhdr(skb);
2716 struct c4iw_ep *ep;
2717 struct c4iw_qp_attributes attrs;
2718 int disconnect = 1;
2719 int release = 0;
2720 unsigned int tid = GET_TID(hdr);
2721 int ret;
2722
2723 ep = get_ep_from_tid(dev, tid);
2724 if (!ep)
2725 return 0;
2726
2727 pr_debug("ep %p tid %u\n", ep, ep->hwtid);
2728 dst_confirm(ep->dst);
2729
2730 set_bit(PEER_CLOSE, &ep->com.history);
2731 mutex_lock(&ep->com.mutex);
2732 switch (ep->com.state) {
2733 case MPA_REQ_WAIT:
2734 __state_set(&ep->com, CLOSING);
2735 break;
2736 case MPA_REQ_SENT:
2737 __state_set(&ep->com, CLOSING);
2738 connect_reply_upcall(ep, -ECONNRESET);
2739 break;
2740 case MPA_REQ_RCVD:
2741
2742 /*
2743 * We're gonna mark this puppy DEAD, but keep
2744 * the reference on it until the ULP accepts or
2745 * rejects the CR. Also wake up anyone waiting
2746 * in rdma connection migration (see c4iw_accept_cr()).
2747 */
2748 __state_set(&ep->com, CLOSING);
2749 pr_debug("waking up ep %p tid %u\n", ep, ep->hwtid);
2750 c4iw_wake_up_noref(ep->com.wr_waitp, -ECONNRESET);
2751 break;
2752 case MPA_REP_SENT:
2753 __state_set(&ep->com, CLOSING);
2754 pr_debug("waking up ep %p tid %u\n", ep, ep->hwtid);
2755 c4iw_wake_up_noref(ep->com.wr_waitp, -ECONNRESET);
2756 break;
2757 case FPDU_MODE:
2758 start_ep_timer(ep);
2759 __state_set(&ep->com, CLOSING);
2760 attrs.next_state = C4IW_QP_STATE_CLOSING;
2761 ret = c4iw_modify_qp(ep->com.qp->rhp, ep->com.qp,
2762 C4IW_QP_ATTR_NEXT_STATE, &attrs, 1);
2763 if (ret != -ECONNRESET) {
2764 peer_close_upcall(ep);
2765 disconnect = 1;
2766 }
2767 break;
2768 case ABORTING:
2769 disconnect = 0;
2770 break;
2771 case CLOSING:
2772 __state_set(&ep->com, MORIBUND);
2773 disconnect = 0;
2774 break;
2775 case MORIBUND:
2776 (void)stop_ep_timer(ep);
2777 if (ep->com.cm_id && ep->com.qp) {
2778 attrs.next_state = C4IW_QP_STATE_IDLE;
2779 c4iw_modify_qp(ep->com.qp->rhp, ep->com.qp,
2780 C4IW_QP_ATTR_NEXT_STATE, &attrs, 1);
2781 }
2782 close_complete_upcall(ep, 0);
2783 __state_set(&ep->com, DEAD);
2784 release = 1;
2785 disconnect = 0;
2786 break;
2787 case DEAD:
2788 disconnect = 0;
2789 break;
2790 default:
2791 WARN_ONCE(1, "Bad endpoint state %u\n", ep->com.state);
2792 }
2793 mutex_unlock(&ep->com.mutex);
2794 if (disconnect)
2795 c4iw_ep_disconnect(ep, 0, GFP_KERNEL);
2796 if (release)
2797 release_ep_resources(ep);
2798 c4iw_put_ep(&ep->com);
2799 return 0;
2800 }
2801
finish_peer_abort(struct c4iw_dev * dev,struct c4iw_ep * ep)2802 static void finish_peer_abort(struct c4iw_dev *dev, struct c4iw_ep *ep)
2803 {
2804 complete_cached_srq_buffers(ep, ep->srqe_idx);
2805 if (ep->com.cm_id && ep->com.qp) {
2806 struct c4iw_qp_attributes attrs;
2807
2808 attrs.next_state = C4IW_QP_STATE_ERROR;
2809 c4iw_modify_qp(ep->com.qp->rhp, ep->com.qp,
2810 C4IW_QP_ATTR_NEXT_STATE, &attrs, 1);
2811 }
2812 peer_abort_upcall(ep);
2813 release_ep_resources(ep);
2814 c4iw_put_ep(&ep->com);
2815 }
2816
peer_abort(struct c4iw_dev * dev,struct sk_buff * skb)2817 static int peer_abort(struct c4iw_dev *dev, struct sk_buff *skb)
2818 {
2819 struct cpl_abort_req_rss6 *req = cplhdr(skb);
2820 struct c4iw_ep *ep;
2821 struct sk_buff *rpl_skb;
2822 struct c4iw_qp_attributes attrs;
2823 int ret;
2824 int release = 0;
2825 unsigned int tid = GET_TID(req);
2826 u8 status;
2827 u32 srqidx;
2828
2829 u32 len = roundup(sizeof(struct cpl_abort_rpl), 16);
2830
2831 ep = get_ep_from_tid(dev, tid);
2832 if (!ep)
2833 return 0;
2834
2835 status = ABORT_RSS_STATUS_G(be32_to_cpu(req->srqidx_status));
2836
2837 if (cxgb_is_neg_adv(status)) {
2838 pr_debug("Negative advice on abort- tid %u status %d (%s)\n",
2839 ep->hwtid, status, neg_adv_str(status));
2840 ep->stats.abort_neg_adv++;
2841 mutex_lock(&dev->rdev.stats.lock);
2842 dev->rdev.stats.neg_adv++;
2843 mutex_unlock(&dev->rdev.stats.lock);
2844 goto deref_ep;
2845 }
2846
2847 pr_debug("ep %p tid %u state %u\n", ep, ep->hwtid,
2848 ep->com.state);
2849 set_bit(PEER_ABORT, &ep->com.history);
2850
2851 /*
2852 * Wake up any threads in rdma_init() or rdma_fini().
2853 * However, this is not needed if com state is just
2854 * MPA_REQ_SENT
2855 */
2856 if (ep->com.state != MPA_REQ_SENT)
2857 c4iw_wake_up_noref(ep->com.wr_waitp, -ECONNRESET);
2858
2859 mutex_lock(&ep->com.mutex);
2860 switch (ep->com.state) {
2861 case CONNECTING:
2862 c4iw_put_ep(&ep->parent_ep->com);
2863 break;
2864 case MPA_REQ_WAIT:
2865 (void)stop_ep_timer(ep);
2866 break;
2867 case MPA_REQ_SENT:
2868 (void)stop_ep_timer(ep);
2869 if (status != CPL_ERR_CONN_RESET || mpa_rev == 1 ||
2870 (mpa_rev == 2 && ep->tried_with_mpa_v1))
2871 connect_reply_upcall(ep, -ECONNRESET);
2872 else {
2873 /*
2874 * we just don't send notification upwards because we
2875 * want to retry with mpa_v1 without upper layers even
2876 * knowing it.
2877 *
2878 * do some housekeeping so as to re-initiate the
2879 * connection
2880 */
2881 pr_info("%s: mpa_rev=%d. Retrying with mpav1\n",
2882 __func__, mpa_rev);
2883 ep->retry_with_mpa_v1 = 1;
2884 }
2885 break;
2886 case MPA_REP_SENT:
2887 break;
2888 case MPA_REQ_RCVD:
2889 break;
2890 case MORIBUND:
2891 case CLOSING:
2892 stop_ep_timer(ep);
2893 fallthrough;
2894 case FPDU_MODE:
2895 if (ep->com.qp && ep->com.qp->srq) {
2896 srqidx = ABORT_RSS_SRQIDX_G(
2897 be32_to_cpu(req->srqidx_status));
2898 if (srqidx) {
2899 complete_cached_srq_buffers(ep, srqidx);
2900 } else {
2901 /* Hold ep ref until finish_peer_abort() */
2902 c4iw_get_ep(&ep->com);
2903 __state_set(&ep->com, ABORTING);
2904 set_bit(PEER_ABORT_IN_PROGRESS, &ep->com.flags);
2905 read_tcb(ep);
2906 break;
2907
2908 }
2909 }
2910
2911 if (ep->com.cm_id && ep->com.qp) {
2912 attrs.next_state = C4IW_QP_STATE_ERROR;
2913 ret = c4iw_modify_qp(ep->com.qp->rhp,
2914 ep->com.qp, C4IW_QP_ATTR_NEXT_STATE,
2915 &attrs, 1);
2916 if (ret)
2917 pr_err("%s - qp <- error failed!\n", __func__);
2918 }
2919 peer_abort_upcall(ep);
2920 break;
2921 case ABORTING:
2922 break;
2923 case DEAD:
2924 pr_warn("%s PEER_ABORT IN DEAD STATE!!!!\n", __func__);
2925 mutex_unlock(&ep->com.mutex);
2926 goto deref_ep;
2927 default:
2928 WARN_ONCE(1, "Bad endpoint state %u\n", ep->com.state);
2929 break;
2930 }
2931 dst_confirm(ep->dst);
2932 if (ep->com.state != ABORTING) {
2933 __state_set(&ep->com, DEAD);
2934 /* we don't release if we want to retry with mpa_v1 */
2935 if (!ep->retry_with_mpa_v1)
2936 release = 1;
2937 }
2938 mutex_unlock(&ep->com.mutex);
2939
2940 rpl_skb = skb_dequeue(&ep->com.ep_skb_list);
2941 if (WARN_ON(!rpl_skb)) {
2942 release = 1;
2943 goto out;
2944 }
2945
2946 cxgb_mk_abort_rpl(rpl_skb, len, ep->hwtid, ep->txq_idx);
2947
2948 c4iw_ofld_send(&ep->com.dev->rdev, rpl_skb);
2949 out:
2950 if (release)
2951 release_ep_resources(ep);
2952 else if (ep->retry_with_mpa_v1) {
2953 if (ep->com.remote_addr.ss_family == AF_INET6) {
2954 struct sockaddr_in6 *sin6 =
2955 (struct sockaddr_in6 *)
2956 &ep->com.local_addr;
2957 cxgb4_clip_release(
2958 ep->com.dev->rdev.lldi.ports[0],
2959 (const u32 *)&sin6->sin6_addr.s6_addr,
2960 1);
2961 }
2962 xa_erase_irq(&ep->com.dev->hwtids, ep->hwtid);
2963 cxgb4_remove_tid(ep->com.dev->rdev.lldi.tids, 0, ep->hwtid,
2964 ep->com.local_addr.ss_family);
2965 dst_release(ep->dst);
2966 cxgb4_l2t_release(ep->l2t);
2967 c4iw_reconnect(ep);
2968 }
2969
2970 deref_ep:
2971 c4iw_put_ep(&ep->com);
2972 /* Dereferencing ep, referenced in peer_abort_intr() */
2973 c4iw_put_ep(&ep->com);
2974 return 0;
2975 }
2976
close_con_rpl(struct c4iw_dev * dev,struct sk_buff * skb)2977 static int close_con_rpl(struct c4iw_dev *dev, struct sk_buff *skb)
2978 {
2979 struct c4iw_ep *ep;
2980 struct c4iw_qp_attributes attrs;
2981 struct cpl_close_con_rpl *rpl = cplhdr(skb);
2982 int release = 0;
2983 unsigned int tid = GET_TID(rpl);
2984
2985 ep = get_ep_from_tid(dev, tid);
2986 if (!ep)
2987 return 0;
2988
2989 pr_debug("ep %p tid %u\n", ep, ep->hwtid);
2990
2991 /* The cm_id may be null if we failed to connect */
2992 mutex_lock(&ep->com.mutex);
2993 set_bit(CLOSE_CON_RPL, &ep->com.history);
2994 switch (ep->com.state) {
2995 case CLOSING:
2996 __state_set(&ep->com, MORIBUND);
2997 break;
2998 case MORIBUND:
2999 (void)stop_ep_timer(ep);
3000 if ((ep->com.cm_id) && (ep->com.qp)) {
3001 attrs.next_state = C4IW_QP_STATE_IDLE;
3002 c4iw_modify_qp(ep->com.qp->rhp,
3003 ep->com.qp,
3004 C4IW_QP_ATTR_NEXT_STATE,
3005 &attrs, 1);
3006 }
3007 close_complete_upcall(ep, 0);
3008 __state_set(&ep->com, DEAD);
3009 release = 1;
3010 break;
3011 case ABORTING:
3012 case DEAD:
3013 break;
3014 default:
3015 WARN_ONCE(1, "Bad endpoint state %u\n", ep->com.state);
3016 break;
3017 }
3018 mutex_unlock(&ep->com.mutex);
3019 if (release)
3020 release_ep_resources(ep);
3021 c4iw_put_ep(&ep->com);
3022 return 0;
3023 }
3024
terminate(struct c4iw_dev * dev,struct sk_buff * skb)3025 static int terminate(struct c4iw_dev *dev, struct sk_buff *skb)
3026 {
3027 struct cpl_rdma_terminate *rpl = cplhdr(skb);
3028 unsigned int tid = GET_TID(rpl);
3029 struct c4iw_ep *ep;
3030 struct c4iw_qp_attributes attrs;
3031
3032 ep = get_ep_from_tid(dev, tid);
3033
3034 if (ep) {
3035 if (ep->com.qp) {
3036 pr_warn("TERM received tid %u qpid %u\n", tid,
3037 ep->com.qp->wq.sq.qid);
3038 attrs.next_state = C4IW_QP_STATE_TERMINATE;
3039 c4iw_modify_qp(ep->com.qp->rhp, ep->com.qp,
3040 C4IW_QP_ATTR_NEXT_STATE, &attrs, 1);
3041 }
3042
3043 /* As per draft-hilland-iwarp-verbs-v1.0, sec 6.2.3,
3044 * when entering the TERM state the RNIC MUST initiate a CLOSE.
3045 */
3046 c4iw_ep_disconnect(ep, 1, GFP_KERNEL);
3047 c4iw_put_ep(&ep->com);
3048 } else
3049 pr_warn("TERM received tid %u no ep/qp\n", tid);
3050
3051 return 0;
3052 }
3053
3054 /*
3055 * Upcall from the adapter indicating data has been transmitted.
3056 * For us its just the single MPA request or reply. We can now free
3057 * the skb holding the mpa message.
3058 */
fw4_ack(struct c4iw_dev * dev,struct sk_buff * skb)3059 static int fw4_ack(struct c4iw_dev *dev, struct sk_buff *skb)
3060 {
3061 struct c4iw_ep *ep;
3062 struct cpl_fw4_ack *hdr = cplhdr(skb);
3063 u8 credits = hdr->credits;
3064 unsigned int tid = GET_TID(hdr);
3065
3066
3067 ep = get_ep_from_tid(dev, tid);
3068 if (!ep)
3069 return 0;
3070 pr_debug("ep %p tid %u credits %u\n",
3071 ep, ep->hwtid, credits);
3072 if (credits == 0) {
3073 pr_debug("0 credit ack ep %p tid %u state %u\n",
3074 ep, ep->hwtid, state_read(&ep->com));
3075 goto out;
3076 }
3077
3078 dst_confirm(ep->dst);
3079 if (ep->mpa_skb) {
3080 pr_debug("last streaming msg ack ep %p tid %u state %u initiator %u freeing skb\n",
3081 ep, ep->hwtid, state_read(&ep->com),
3082 ep->mpa_attr.initiator ? 1 : 0);
3083 mutex_lock(&ep->com.mutex);
3084 kfree_skb(ep->mpa_skb);
3085 ep->mpa_skb = NULL;
3086 if (test_bit(STOP_MPA_TIMER, &ep->com.flags))
3087 stop_ep_timer(ep);
3088 mutex_unlock(&ep->com.mutex);
3089 }
3090 out:
3091 c4iw_put_ep(&ep->com);
3092 return 0;
3093 }
3094
c4iw_reject_cr(struct iw_cm_id * cm_id,const void * pdata,u8 pdata_len)3095 int c4iw_reject_cr(struct iw_cm_id *cm_id, const void *pdata, u8 pdata_len)
3096 {
3097 int abort;
3098 struct c4iw_ep *ep = to_ep(cm_id);
3099
3100 pr_debug("ep %p tid %u\n", ep, ep->hwtid);
3101
3102 mutex_lock(&ep->com.mutex);
3103 if (ep->com.state != MPA_REQ_RCVD) {
3104 mutex_unlock(&ep->com.mutex);
3105 c4iw_put_ep(&ep->com);
3106 return -ECONNRESET;
3107 }
3108 set_bit(ULP_REJECT, &ep->com.history);
3109 if (mpa_rev == 0)
3110 abort = 1;
3111 else
3112 abort = send_mpa_reject(ep, pdata, pdata_len);
3113 mutex_unlock(&ep->com.mutex);
3114
3115 stop_ep_timer(ep);
3116 c4iw_ep_disconnect(ep, abort != 0, GFP_KERNEL);
3117 c4iw_put_ep(&ep->com);
3118 return 0;
3119 }
3120
c4iw_accept_cr(struct iw_cm_id * cm_id,struct iw_cm_conn_param * conn_param)3121 int c4iw_accept_cr(struct iw_cm_id *cm_id, struct iw_cm_conn_param *conn_param)
3122 {
3123 int err;
3124 struct c4iw_qp_attributes attrs;
3125 enum c4iw_qp_attr_mask mask;
3126 struct c4iw_ep *ep = to_ep(cm_id);
3127 struct c4iw_dev *h = to_c4iw_dev(cm_id->device);
3128 struct c4iw_qp *qp = get_qhp(h, conn_param->qpn);
3129 int abort = 0;
3130
3131 pr_debug("ep %p tid %u\n", ep, ep->hwtid);
3132
3133 mutex_lock(&ep->com.mutex);
3134 if (ep->com.state != MPA_REQ_RCVD) {
3135 err = -ECONNRESET;
3136 goto err_out;
3137 }
3138
3139 if (!qp) {
3140 err = -EINVAL;
3141 goto err_out;
3142 }
3143
3144 set_bit(ULP_ACCEPT, &ep->com.history);
3145 if ((conn_param->ord > cur_max_read_depth(ep->com.dev)) ||
3146 (conn_param->ird > cur_max_read_depth(ep->com.dev))) {
3147 err = -EINVAL;
3148 goto err_abort;
3149 }
3150
3151 if (ep->mpa_attr.version == 2 && ep->mpa_attr.enhanced_rdma_conn) {
3152 if (conn_param->ord > ep->ird) {
3153 if (RELAXED_IRD_NEGOTIATION) {
3154 conn_param->ord = ep->ird;
3155 } else {
3156 ep->ird = conn_param->ird;
3157 ep->ord = conn_param->ord;
3158 send_mpa_reject(ep, conn_param->private_data,
3159 conn_param->private_data_len);
3160 err = -ENOMEM;
3161 goto err_abort;
3162 }
3163 }
3164 if (conn_param->ird < ep->ord) {
3165 if (RELAXED_IRD_NEGOTIATION &&
3166 ep->ord <= h->rdev.lldi.max_ordird_qp) {
3167 conn_param->ird = ep->ord;
3168 } else {
3169 err = -ENOMEM;
3170 goto err_abort;
3171 }
3172 }
3173 }
3174 ep->ird = conn_param->ird;
3175 ep->ord = conn_param->ord;
3176
3177 if (ep->mpa_attr.version == 1) {
3178 if (peer2peer && ep->ird == 0)
3179 ep->ird = 1;
3180 } else {
3181 if (peer2peer &&
3182 (ep->mpa_attr.p2p_type != FW_RI_INIT_P2PTYPE_DISABLED) &&
3183 (p2p_type == FW_RI_INIT_P2PTYPE_READ_REQ) && ep->ird == 0)
3184 ep->ird = 1;
3185 }
3186
3187 pr_debug("ird %d ord %d\n", ep->ird, ep->ord);
3188
3189 ep->com.cm_id = cm_id;
3190 ref_cm_id(&ep->com);
3191 ep->com.qp = qp;
3192 ref_qp(ep);
3193
3194 /* bind QP to EP and move to RTS */
3195 attrs.mpa_attr = ep->mpa_attr;
3196 attrs.max_ird = ep->ird;
3197 attrs.max_ord = ep->ord;
3198 attrs.llp_stream_handle = ep;
3199 attrs.next_state = C4IW_QP_STATE_RTS;
3200
3201 /* bind QP and TID with INIT_WR */
3202 mask = C4IW_QP_ATTR_NEXT_STATE |
3203 C4IW_QP_ATTR_LLP_STREAM_HANDLE |
3204 C4IW_QP_ATTR_MPA_ATTR |
3205 C4IW_QP_ATTR_MAX_IRD |
3206 C4IW_QP_ATTR_MAX_ORD;
3207
3208 err = c4iw_modify_qp(ep->com.qp->rhp,
3209 ep->com.qp, mask, &attrs, 1);
3210 if (err)
3211 goto err_deref_cm_id;
3212
3213 set_bit(STOP_MPA_TIMER, &ep->com.flags);
3214 err = send_mpa_reply(ep, conn_param->private_data,
3215 conn_param->private_data_len);
3216 if (err)
3217 goto err_deref_cm_id;
3218
3219 __state_set(&ep->com, FPDU_MODE);
3220 established_upcall(ep);
3221 mutex_unlock(&ep->com.mutex);
3222 c4iw_put_ep(&ep->com);
3223 return 0;
3224 err_deref_cm_id:
3225 deref_cm_id(&ep->com);
3226 err_abort:
3227 abort = 1;
3228 err_out:
3229 mutex_unlock(&ep->com.mutex);
3230 if (abort)
3231 c4iw_ep_disconnect(ep, 1, GFP_KERNEL);
3232 c4iw_put_ep(&ep->com);
3233 return err;
3234 }
3235
pick_local_ipaddrs(struct c4iw_dev * dev,struct iw_cm_id * cm_id)3236 static int pick_local_ipaddrs(struct c4iw_dev *dev, struct iw_cm_id *cm_id)
3237 {
3238 struct in_device *ind;
3239 int found = 0;
3240 struct sockaddr_in *laddr = (struct sockaddr_in *)&cm_id->m_local_addr;
3241 struct sockaddr_in *raddr = (struct sockaddr_in *)&cm_id->m_remote_addr;
3242 const struct in_ifaddr *ifa;
3243
3244 ind = in_dev_get(dev->rdev.lldi.ports[0]);
3245 if (!ind)
3246 return -EADDRNOTAVAIL;
3247 rcu_read_lock();
3248 in_dev_for_each_ifa_rcu(ifa, ind) {
3249 if (ifa->ifa_flags & IFA_F_SECONDARY)
3250 continue;
3251 laddr->sin_addr.s_addr = ifa->ifa_address;
3252 raddr->sin_addr.s_addr = ifa->ifa_address;
3253 found = 1;
3254 break;
3255 }
3256 rcu_read_unlock();
3257
3258 in_dev_put(ind);
3259 return found ? 0 : -EADDRNOTAVAIL;
3260 }
3261
get_lladdr(struct net_device * dev,struct in6_addr * addr,unsigned char banned_flags)3262 static int get_lladdr(struct net_device *dev, struct in6_addr *addr,
3263 unsigned char banned_flags)
3264 {
3265 struct inet6_dev *idev;
3266 int err = -EADDRNOTAVAIL;
3267
3268 rcu_read_lock();
3269 idev = __in6_dev_get(dev);
3270 if (idev != NULL) {
3271 struct inet6_ifaddr *ifp;
3272
3273 read_lock_bh(&idev->lock);
3274 list_for_each_entry(ifp, &idev->addr_list, if_list) {
3275 if (ifp->scope == IFA_LINK &&
3276 !(ifp->flags & banned_flags)) {
3277 memcpy(addr, &ifp->addr, 16);
3278 err = 0;
3279 break;
3280 }
3281 }
3282 read_unlock_bh(&idev->lock);
3283 }
3284 rcu_read_unlock();
3285 return err;
3286 }
3287
pick_local_ip6addrs(struct c4iw_dev * dev,struct iw_cm_id * cm_id)3288 static int pick_local_ip6addrs(struct c4iw_dev *dev, struct iw_cm_id *cm_id)
3289 {
3290 struct in6_addr addr;
3291 struct sockaddr_in6 *la6 = (struct sockaddr_in6 *)&cm_id->m_local_addr;
3292 struct sockaddr_in6 *ra6 = (struct sockaddr_in6 *)&cm_id->m_remote_addr;
3293
3294 if (!get_lladdr(dev->rdev.lldi.ports[0], &addr, IFA_F_TENTATIVE)) {
3295 memcpy(la6->sin6_addr.s6_addr, &addr, 16);
3296 memcpy(ra6->sin6_addr.s6_addr, &addr, 16);
3297 return 0;
3298 }
3299 return -EADDRNOTAVAIL;
3300 }
3301
c4iw_connect(struct iw_cm_id * cm_id,struct iw_cm_conn_param * conn_param)3302 int c4iw_connect(struct iw_cm_id *cm_id, struct iw_cm_conn_param *conn_param)
3303 {
3304 struct c4iw_dev *dev = to_c4iw_dev(cm_id->device);
3305 struct c4iw_ep *ep;
3306 int err = 0;
3307 struct sockaddr_in *laddr;
3308 struct sockaddr_in *raddr;
3309 struct sockaddr_in6 *laddr6;
3310 struct sockaddr_in6 *raddr6;
3311 __u8 *ra;
3312 int iptype;
3313
3314 if ((conn_param->ord > cur_max_read_depth(dev)) ||
3315 (conn_param->ird > cur_max_read_depth(dev))) {
3316 err = -EINVAL;
3317 goto out;
3318 }
3319 ep = alloc_ep(sizeof(*ep), GFP_KERNEL);
3320 if (!ep) {
3321 pr_err("%s - cannot alloc ep\n", __func__);
3322 err = -ENOMEM;
3323 goto out;
3324 }
3325
3326 skb_queue_head_init(&ep->com.ep_skb_list);
3327 if (alloc_ep_skb_list(&ep->com.ep_skb_list, CN_MAX_CON_BUF)) {
3328 err = -ENOMEM;
3329 goto fail1;
3330 }
3331
3332 timer_setup(&ep->timer, ep_timeout, 0);
3333 ep->plen = conn_param->private_data_len;
3334 if (ep->plen)
3335 memcpy(ep->mpa_pkt + sizeof(struct mpa_message),
3336 conn_param->private_data, ep->plen);
3337 ep->ird = conn_param->ird;
3338 ep->ord = conn_param->ord;
3339
3340 if (peer2peer && ep->ord == 0)
3341 ep->ord = 1;
3342
3343 ep->com.cm_id = cm_id;
3344 ref_cm_id(&ep->com);
3345 cm_id->provider_data = ep;
3346 ep->com.dev = dev;
3347 ep->com.qp = get_qhp(dev, conn_param->qpn);
3348 if (!ep->com.qp) {
3349 pr_warn("%s qpn 0x%x not found!\n", __func__, conn_param->qpn);
3350 err = -EINVAL;
3351 goto fail2;
3352 }
3353 ref_qp(ep);
3354 pr_debug("qpn 0x%x qp %p cm_id %p\n", conn_param->qpn,
3355 ep->com.qp, cm_id);
3356
3357 /*
3358 * Allocate an active TID to initiate a TCP connection.
3359 */
3360 ep->atid = cxgb4_alloc_atid(dev->rdev.lldi.tids, ep);
3361 if (ep->atid == -1) {
3362 pr_err("%s - cannot alloc atid\n", __func__);
3363 err = -ENOMEM;
3364 goto fail2;
3365 }
3366 err = xa_insert_irq(&dev->atids, ep->atid, ep, GFP_KERNEL);
3367 if (err)
3368 goto fail5;
3369
3370 memcpy(&ep->com.local_addr, &cm_id->m_local_addr,
3371 sizeof(ep->com.local_addr));
3372 memcpy(&ep->com.remote_addr, &cm_id->m_remote_addr,
3373 sizeof(ep->com.remote_addr));
3374
3375 laddr = (struct sockaddr_in *)&ep->com.local_addr;
3376 raddr = (struct sockaddr_in *)&ep->com.remote_addr;
3377 laddr6 = (struct sockaddr_in6 *)&ep->com.local_addr;
3378 raddr6 = (struct sockaddr_in6 *) &ep->com.remote_addr;
3379
3380 if (cm_id->m_remote_addr.ss_family == AF_INET) {
3381 iptype = 4;
3382 ra = (__u8 *)&raddr->sin_addr;
3383
3384 /*
3385 * Handle loopback requests to INADDR_ANY.
3386 */
3387 if (raddr->sin_addr.s_addr == htonl(INADDR_ANY)) {
3388 err = pick_local_ipaddrs(dev, cm_id);
3389 if (err)
3390 goto fail3;
3391 }
3392
3393 /* find a route */
3394 pr_debug("saddr %pI4 sport 0x%x raddr %pI4 rport 0x%x\n",
3395 &laddr->sin_addr, ntohs(laddr->sin_port),
3396 ra, ntohs(raddr->sin_port));
3397 ep->dst = cxgb_find_route(&dev->rdev.lldi, get_real_dev,
3398 laddr->sin_addr.s_addr,
3399 raddr->sin_addr.s_addr,
3400 laddr->sin_port,
3401 raddr->sin_port, cm_id->tos);
3402 } else {
3403 iptype = 6;
3404 ra = (__u8 *)&raddr6->sin6_addr;
3405
3406 /*
3407 * Handle loopback requests to INADDR_ANY.
3408 */
3409 if (ipv6_addr_type(&raddr6->sin6_addr) == IPV6_ADDR_ANY) {
3410 err = pick_local_ip6addrs(dev, cm_id);
3411 if (err)
3412 goto fail3;
3413 }
3414
3415 /* find a route */
3416 pr_debug("saddr %pI6 sport 0x%x raddr %pI6 rport 0x%x\n",
3417 laddr6->sin6_addr.s6_addr,
3418 ntohs(laddr6->sin6_port),
3419 raddr6->sin6_addr.s6_addr, ntohs(raddr6->sin6_port));
3420 ep->dst = cxgb_find_route6(&dev->rdev.lldi, get_real_dev,
3421 laddr6->sin6_addr.s6_addr,
3422 raddr6->sin6_addr.s6_addr,
3423 laddr6->sin6_port,
3424 raddr6->sin6_port, cm_id->tos,
3425 raddr6->sin6_scope_id);
3426 }
3427 if (!ep->dst) {
3428 pr_err("%s - cannot find route\n", __func__);
3429 err = -EHOSTUNREACH;
3430 goto fail3;
3431 }
3432
3433 err = import_ep(ep, iptype, ra, ep->dst, ep->com.dev, true,
3434 ep->com.dev->rdev.lldi.adapter_type, cm_id->tos);
3435 if (err) {
3436 pr_err("%s - cannot alloc l2e\n", __func__);
3437 goto fail4;
3438 }
3439
3440 pr_debug("txq_idx %u tx_chan %u smac_idx %u rss_qid %u l2t_idx %u\n",
3441 ep->txq_idx, ep->tx_chan, ep->smac_idx, ep->rss_qid,
3442 ep->l2t->idx);
3443
3444 state_set(&ep->com, CONNECTING);
3445 ep->tos = cm_id->tos;
3446
3447 /* send connect request to rnic */
3448 err = send_connect(ep);
3449 if (!err)
3450 goto out;
3451
3452 cxgb4_l2t_release(ep->l2t);
3453 fail4:
3454 dst_release(ep->dst);
3455 fail3:
3456 xa_erase_irq(&ep->com.dev->atids, ep->atid);
3457 fail5:
3458 cxgb4_free_atid(ep->com.dev->rdev.lldi.tids, ep->atid);
3459 fail2:
3460 skb_queue_purge(&ep->com.ep_skb_list);
3461 deref_cm_id(&ep->com);
3462 fail1:
3463 c4iw_put_ep(&ep->com);
3464 out:
3465 return err;
3466 }
3467
create_server6(struct c4iw_dev * dev,struct c4iw_listen_ep * ep)3468 static int create_server6(struct c4iw_dev *dev, struct c4iw_listen_ep *ep)
3469 {
3470 int err;
3471 struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *)
3472 &ep->com.local_addr;
3473
3474 if (ipv6_addr_type(&sin6->sin6_addr) != IPV6_ADDR_ANY) {
3475 err = cxgb4_clip_get(ep->com.dev->rdev.lldi.ports[0],
3476 (const u32 *)&sin6->sin6_addr.s6_addr, 1);
3477 if (err)
3478 return err;
3479 }
3480 c4iw_init_wr_wait(ep->com.wr_waitp);
3481 err = cxgb4_create_server6(ep->com.dev->rdev.lldi.ports[0],
3482 ep->stid, &sin6->sin6_addr,
3483 sin6->sin6_port,
3484 ep->com.dev->rdev.lldi.rxq_ids[0]);
3485 if (!err)
3486 err = c4iw_wait_for_reply(&ep->com.dev->rdev,
3487 ep->com.wr_waitp,
3488 0, 0, __func__);
3489 else if (err > 0)
3490 err = net_xmit_errno(err);
3491 if (err) {
3492 cxgb4_clip_release(ep->com.dev->rdev.lldi.ports[0],
3493 (const u32 *)&sin6->sin6_addr.s6_addr, 1);
3494 pr_err("cxgb4_create_server6/filter failed err %d stid %d laddr %pI6 lport %d\n",
3495 err, ep->stid,
3496 sin6->sin6_addr.s6_addr, ntohs(sin6->sin6_port));
3497 }
3498 return err;
3499 }
3500
create_server4(struct c4iw_dev * dev,struct c4iw_listen_ep * ep)3501 static int create_server4(struct c4iw_dev *dev, struct c4iw_listen_ep *ep)
3502 {
3503 int err;
3504 struct sockaddr_in *sin = (struct sockaddr_in *)
3505 &ep->com.local_addr;
3506
3507 if (dev->rdev.lldi.enable_fw_ofld_conn) {
3508 do {
3509 err = cxgb4_create_server_filter(
3510 ep->com.dev->rdev.lldi.ports[0], ep->stid,
3511 sin->sin_addr.s_addr, sin->sin_port, 0,
3512 ep->com.dev->rdev.lldi.rxq_ids[0], 0, 0);
3513 if (err == -EBUSY) {
3514 if (c4iw_fatal_error(&ep->com.dev->rdev)) {
3515 err = -EIO;
3516 break;
3517 }
3518 set_current_state(TASK_UNINTERRUPTIBLE);
3519 schedule_timeout(usecs_to_jiffies(100));
3520 }
3521 } while (err == -EBUSY);
3522 } else {
3523 c4iw_init_wr_wait(ep->com.wr_waitp);
3524 err = cxgb4_create_server(ep->com.dev->rdev.lldi.ports[0],
3525 ep->stid, sin->sin_addr.s_addr, sin->sin_port,
3526 0, ep->com.dev->rdev.lldi.rxq_ids[0]);
3527 if (!err)
3528 err = c4iw_wait_for_reply(&ep->com.dev->rdev,
3529 ep->com.wr_waitp,
3530 0, 0, __func__);
3531 else if (err > 0)
3532 err = net_xmit_errno(err);
3533 }
3534 if (err)
3535 pr_err("cxgb4_create_server/filter failed err %d stid %d laddr %pI4 lport %d\n"
3536 , err, ep->stid,
3537 &sin->sin_addr, ntohs(sin->sin_port));
3538 return err;
3539 }
3540
c4iw_create_listen(struct iw_cm_id * cm_id,int backlog)3541 int c4iw_create_listen(struct iw_cm_id *cm_id, int backlog)
3542 {
3543 int err = 0;
3544 struct c4iw_dev *dev = to_c4iw_dev(cm_id->device);
3545 struct c4iw_listen_ep *ep;
3546
3547 might_sleep();
3548
3549 ep = alloc_ep(sizeof(*ep), GFP_KERNEL);
3550 if (!ep) {
3551 pr_err("%s - cannot alloc ep\n", __func__);
3552 err = -ENOMEM;
3553 goto fail1;
3554 }
3555 skb_queue_head_init(&ep->com.ep_skb_list);
3556 pr_debug("ep %p\n", ep);
3557 ep->com.cm_id = cm_id;
3558 ref_cm_id(&ep->com);
3559 ep->com.dev = dev;
3560 ep->backlog = backlog;
3561 memcpy(&ep->com.local_addr, &cm_id->m_local_addr,
3562 sizeof(ep->com.local_addr));
3563
3564 /*
3565 * Allocate a server TID.
3566 */
3567 if (dev->rdev.lldi.enable_fw_ofld_conn &&
3568 ep->com.local_addr.ss_family == AF_INET)
3569 ep->stid = cxgb4_alloc_sftid(dev->rdev.lldi.tids,
3570 cm_id->m_local_addr.ss_family, ep);
3571 else
3572 ep->stid = cxgb4_alloc_stid(dev->rdev.lldi.tids,
3573 cm_id->m_local_addr.ss_family, ep);
3574
3575 if (ep->stid == -1) {
3576 pr_err("%s - cannot alloc stid\n", __func__);
3577 err = -ENOMEM;
3578 goto fail2;
3579 }
3580 err = xa_insert_irq(&dev->stids, ep->stid, ep, GFP_KERNEL);
3581 if (err)
3582 goto fail3;
3583
3584 state_set(&ep->com, LISTEN);
3585 if (ep->com.local_addr.ss_family == AF_INET)
3586 err = create_server4(dev, ep);
3587 else
3588 err = create_server6(dev, ep);
3589 if (!err) {
3590 cm_id->provider_data = ep;
3591 goto out;
3592 }
3593 xa_erase_irq(&ep->com.dev->stids, ep->stid);
3594 fail3:
3595 cxgb4_free_stid(ep->com.dev->rdev.lldi.tids, ep->stid,
3596 ep->com.local_addr.ss_family);
3597 fail2:
3598 deref_cm_id(&ep->com);
3599 c4iw_put_ep(&ep->com);
3600 fail1:
3601 out:
3602 return err;
3603 }
3604
c4iw_destroy_listen(struct iw_cm_id * cm_id)3605 int c4iw_destroy_listen(struct iw_cm_id *cm_id)
3606 {
3607 int err;
3608 struct c4iw_listen_ep *ep = to_listen_ep(cm_id);
3609
3610 pr_debug("ep %p\n", ep);
3611
3612 might_sleep();
3613 state_set(&ep->com, DEAD);
3614 if (ep->com.dev->rdev.lldi.enable_fw_ofld_conn &&
3615 ep->com.local_addr.ss_family == AF_INET) {
3616 err = cxgb4_remove_server_filter(
3617 ep->com.dev->rdev.lldi.ports[0], ep->stid,
3618 ep->com.dev->rdev.lldi.rxq_ids[0], false);
3619 } else {
3620 struct sockaddr_in6 *sin6;
3621 c4iw_init_wr_wait(ep->com.wr_waitp);
3622 err = cxgb4_remove_server(
3623 ep->com.dev->rdev.lldi.ports[0], ep->stid,
3624 ep->com.dev->rdev.lldi.rxq_ids[0],
3625 ep->com.local_addr.ss_family == AF_INET6);
3626 if (err)
3627 goto done;
3628 err = c4iw_wait_for_reply(&ep->com.dev->rdev, ep->com.wr_waitp,
3629 0, 0, __func__);
3630 sin6 = (struct sockaddr_in6 *)&ep->com.local_addr;
3631 cxgb4_clip_release(ep->com.dev->rdev.lldi.ports[0],
3632 (const u32 *)&sin6->sin6_addr.s6_addr, 1);
3633 }
3634 xa_erase_irq(&ep->com.dev->stids, ep->stid);
3635 cxgb4_free_stid(ep->com.dev->rdev.lldi.tids, ep->stid,
3636 ep->com.local_addr.ss_family);
3637 done:
3638 deref_cm_id(&ep->com);
3639 c4iw_put_ep(&ep->com);
3640 return err;
3641 }
3642
c4iw_ep_disconnect(struct c4iw_ep * ep,int abrupt,gfp_t gfp)3643 int c4iw_ep_disconnect(struct c4iw_ep *ep, int abrupt, gfp_t gfp)
3644 {
3645 int ret = 0;
3646 int close = 0;
3647 int fatal = 0;
3648 struct c4iw_rdev *rdev;
3649
3650 mutex_lock(&ep->com.mutex);
3651
3652 pr_debug("ep %p state %s, abrupt %d\n", ep,
3653 states[ep->com.state], abrupt);
3654
3655 /*
3656 * Ref the ep here in case we have fatal errors causing the
3657 * ep to be released and freed.
3658 */
3659 c4iw_get_ep(&ep->com);
3660
3661 rdev = &ep->com.dev->rdev;
3662 if (c4iw_fatal_error(rdev)) {
3663 fatal = 1;
3664 close_complete_upcall(ep, -EIO);
3665 ep->com.state = DEAD;
3666 }
3667 switch (ep->com.state) {
3668 case MPA_REQ_WAIT:
3669 case MPA_REQ_SENT:
3670 case MPA_REQ_RCVD:
3671 case MPA_REP_SENT:
3672 case FPDU_MODE:
3673 case CONNECTING:
3674 close = 1;
3675 if (abrupt)
3676 ep->com.state = ABORTING;
3677 else {
3678 ep->com.state = CLOSING;
3679
3680 /*
3681 * if we close before we see the fw4_ack() then we fix
3682 * up the timer state since we're reusing it.
3683 */
3684 if (ep->mpa_skb &&
3685 test_bit(STOP_MPA_TIMER, &ep->com.flags)) {
3686 clear_bit(STOP_MPA_TIMER, &ep->com.flags);
3687 stop_ep_timer(ep);
3688 }
3689 start_ep_timer(ep);
3690 }
3691 set_bit(CLOSE_SENT, &ep->com.flags);
3692 break;
3693 case CLOSING:
3694 if (!test_and_set_bit(CLOSE_SENT, &ep->com.flags)) {
3695 close = 1;
3696 if (abrupt) {
3697 (void)stop_ep_timer(ep);
3698 ep->com.state = ABORTING;
3699 } else
3700 ep->com.state = MORIBUND;
3701 }
3702 break;
3703 case MORIBUND:
3704 case ABORTING:
3705 case DEAD:
3706 pr_debug("ignoring disconnect ep %p state %u\n",
3707 ep, ep->com.state);
3708 break;
3709 default:
3710 WARN_ONCE(1, "Bad endpoint state %u\n", ep->com.state);
3711 break;
3712 }
3713
3714 if (close) {
3715 if (abrupt) {
3716 set_bit(EP_DISC_ABORT, &ep->com.history);
3717 ret = send_abort(ep);
3718 } else {
3719 set_bit(EP_DISC_CLOSE, &ep->com.history);
3720 ret = send_halfclose(ep);
3721 }
3722 if (ret) {
3723 set_bit(EP_DISC_FAIL, &ep->com.history);
3724 if (!abrupt) {
3725 stop_ep_timer(ep);
3726 close_complete_upcall(ep, -EIO);
3727 }
3728 if (ep->com.qp) {
3729 struct c4iw_qp_attributes attrs;
3730
3731 attrs.next_state = C4IW_QP_STATE_ERROR;
3732 ret = c4iw_modify_qp(ep->com.qp->rhp,
3733 ep->com.qp,
3734 C4IW_QP_ATTR_NEXT_STATE,
3735 &attrs, 1);
3736 if (ret)
3737 pr_err("%s - qp <- error failed!\n",
3738 __func__);
3739 }
3740 fatal = 1;
3741 }
3742 }
3743 mutex_unlock(&ep->com.mutex);
3744 c4iw_put_ep(&ep->com);
3745 if (fatal)
3746 release_ep_resources(ep);
3747 return ret;
3748 }
3749
active_ofld_conn_reply(struct c4iw_dev * dev,struct sk_buff * skb,struct cpl_fw6_msg_ofld_connection_wr_rpl * req)3750 static void active_ofld_conn_reply(struct c4iw_dev *dev, struct sk_buff *skb,
3751 struct cpl_fw6_msg_ofld_connection_wr_rpl *req)
3752 {
3753 struct c4iw_ep *ep;
3754 int atid = be32_to_cpu(req->tid);
3755
3756 ep = (struct c4iw_ep *)lookup_atid(dev->rdev.lldi.tids,
3757 (__force u32) req->tid);
3758 if (!ep)
3759 return;
3760
3761 switch (req->retval) {
3762 case FW_ENOMEM:
3763 set_bit(ACT_RETRY_NOMEM, &ep->com.history);
3764 if (ep->retry_count++ < ACT_OPEN_RETRY_COUNT) {
3765 send_fw_act_open_req(ep, atid);
3766 return;
3767 }
3768 fallthrough;
3769 case FW_EADDRINUSE:
3770 set_bit(ACT_RETRY_INUSE, &ep->com.history);
3771 if (ep->retry_count++ < ACT_OPEN_RETRY_COUNT) {
3772 send_fw_act_open_req(ep, atid);
3773 return;
3774 }
3775 break;
3776 default:
3777 pr_info("%s unexpected ofld conn wr retval %d\n",
3778 __func__, req->retval);
3779 break;
3780 }
3781 pr_err("active ofld_connect_wr failure %d atid %d\n",
3782 req->retval, atid);
3783 mutex_lock(&dev->rdev.stats.lock);
3784 dev->rdev.stats.act_ofld_conn_fails++;
3785 mutex_unlock(&dev->rdev.stats.lock);
3786 connect_reply_upcall(ep, status2errno(req->retval));
3787 state_set(&ep->com, DEAD);
3788 if (ep->com.remote_addr.ss_family == AF_INET6) {
3789 struct sockaddr_in6 *sin6 =
3790 (struct sockaddr_in6 *)&ep->com.local_addr;
3791 cxgb4_clip_release(ep->com.dev->rdev.lldi.ports[0],
3792 (const u32 *)&sin6->sin6_addr.s6_addr, 1);
3793 }
3794 xa_erase_irq(&dev->atids, atid);
3795 cxgb4_free_atid(dev->rdev.lldi.tids, atid);
3796 dst_release(ep->dst);
3797 cxgb4_l2t_release(ep->l2t);
3798 c4iw_put_ep(&ep->com);
3799 }
3800
passive_ofld_conn_reply(struct c4iw_dev * dev,struct sk_buff * skb,struct cpl_fw6_msg_ofld_connection_wr_rpl * req)3801 static void passive_ofld_conn_reply(struct c4iw_dev *dev, struct sk_buff *skb,
3802 struct cpl_fw6_msg_ofld_connection_wr_rpl *req)
3803 {
3804 struct sk_buff *rpl_skb;
3805 struct cpl_pass_accept_req *cpl;
3806 int ret;
3807
3808 rpl_skb = (struct sk_buff *)(unsigned long)req->cookie;
3809 if (req->retval) {
3810 pr_err("%s passive open failure %d\n", __func__, req->retval);
3811 mutex_lock(&dev->rdev.stats.lock);
3812 dev->rdev.stats.pas_ofld_conn_fails++;
3813 mutex_unlock(&dev->rdev.stats.lock);
3814 kfree_skb(rpl_skb);
3815 } else {
3816 cpl = (struct cpl_pass_accept_req *)cplhdr(rpl_skb);
3817 OPCODE_TID(cpl) = htonl(MK_OPCODE_TID(CPL_PASS_ACCEPT_REQ,
3818 (__force u32) htonl(
3819 (__force u32) req->tid)));
3820 ret = pass_accept_req(dev, rpl_skb);
3821 if (!ret)
3822 kfree_skb(rpl_skb);
3823 }
3824 return;
3825 }
3826
t4_tcb_get_field64(__be64 * tcb,u16 word)3827 static inline u64 t4_tcb_get_field64(__be64 *tcb, u16 word)
3828 {
3829 u64 tlo = be64_to_cpu(tcb[((31 - word) / 2)]);
3830 u64 thi = be64_to_cpu(tcb[((31 - word) / 2) - 1]);
3831 u64 t;
3832 u32 shift = 32;
3833
3834 t = (thi << shift) | (tlo >> shift);
3835
3836 return t;
3837 }
3838
t4_tcb_get_field32(__be64 * tcb,u16 word,u32 mask,u32 shift)3839 static inline u32 t4_tcb_get_field32(__be64 *tcb, u16 word, u32 mask, u32 shift)
3840 {
3841 u32 v;
3842 u64 t = be64_to_cpu(tcb[(31 - word) / 2]);
3843
3844 if (word & 0x1)
3845 shift += 32;
3846 v = (t >> shift) & mask;
3847 return v;
3848 }
3849
read_tcb_rpl(struct c4iw_dev * dev,struct sk_buff * skb)3850 static int read_tcb_rpl(struct c4iw_dev *dev, struct sk_buff *skb)
3851 {
3852 struct cpl_get_tcb_rpl *rpl = cplhdr(skb);
3853 __be64 *tcb = (__be64 *)(rpl + 1);
3854 unsigned int tid = GET_TID(rpl);
3855 struct c4iw_ep *ep;
3856 u64 t_flags_64;
3857 u32 rx_pdu_out;
3858
3859 ep = get_ep_from_tid(dev, tid);
3860 if (!ep)
3861 return 0;
3862 /* Examine the TF_RX_PDU_OUT (bit 49 of the t_flags) in order to
3863 * determine if there's a rx PDU feedback event pending.
3864 *
3865 * If that bit is set, it means we'll need to re-read the TCB's
3866 * rq_start value. The final value is the one present in a TCB
3867 * with the TF_RX_PDU_OUT bit cleared.
3868 */
3869
3870 t_flags_64 = t4_tcb_get_field64(tcb, TCB_T_FLAGS_W);
3871 rx_pdu_out = (t_flags_64 & TF_RX_PDU_OUT_V(1)) >> TF_RX_PDU_OUT_S;
3872
3873 c4iw_put_ep(&ep->com); /* from get_ep_from_tid() */
3874 c4iw_put_ep(&ep->com); /* from read_tcb() */
3875
3876 /* If TF_RX_PDU_OUT bit is set, re-read the TCB */
3877 if (rx_pdu_out) {
3878 if (++ep->rx_pdu_out_cnt >= 2) {
3879 WARN_ONCE(1, "tcb re-read() reached the guard limit, finishing the cleanup\n");
3880 goto cleanup;
3881 }
3882 read_tcb(ep);
3883 return 0;
3884 }
3885
3886 ep->srqe_idx = t4_tcb_get_field32(tcb, TCB_RQ_START_W, TCB_RQ_START_M,
3887 TCB_RQ_START_S);
3888 cleanup:
3889 pr_debug("ep %p tid %u %016x\n", ep, ep->hwtid, ep->srqe_idx);
3890
3891 if (test_bit(PEER_ABORT_IN_PROGRESS, &ep->com.flags))
3892 finish_peer_abort(dev, ep);
3893 else if (test_bit(ABORT_REQ_IN_PROGRESS, &ep->com.flags))
3894 send_abort_req(ep);
3895 else
3896 WARN_ONCE(1, "unexpected state!");
3897
3898 return 0;
3899 }
3900
deferred_fw6_msg(struct c4iw_dev * dev,struct sk_buff * skb)3901 static int deferred_fw6_msg(struct c4iw_dev *dev, struct sk_buff *skb)
3902 {
3903 struct cpl_fw6_msg *rpl = cplhdr(skb);
3904 struct cpl_fw6_msg_ofld_connection_wr_rpl *req;
3905
3906 switch (rpl->type) {
3907 case FW6_TYPE_CQE:
3908 c4iw_ev_dispatch(dev, (struct t4_cqe *)&rpl->data[0]);
3909 break;
3910 case FW6_TYPE_OFLD_CONNECTION_WR_RPL:
3911 req = (struct cpl_fw6_msg_ofld_connection_wr_rpl *)rpl->data;
3912 switch (req->t_state) {
3913 case TCP_SYN_SENT:
3914 active_ofld_conn_reply(dev, skb, req);
3915 break;
3916 case TCP_SYN_RECV:
3917 passive_ofld_conn_reply(dev, skb, req);
3918 break;
3919 default:
3920 pr_err("%s unexpected ofld conn wr state %d\n",
3921 __func__, req->t_state);
3922 break;
3923 }
3924 break;
3925 }
3926 return 0;
3927 }
3928
build_cpl_pass_accept_req(struct sk_buff * skb,int stid,u8 tos)3929 static void build_cpl_pass_accept_req(struct sk_buff *skb, int stid , u8 tos)
3930 {
3931 __be32 l2info;
3932 __be16 hdr_len, vlantag, len;
3933 u16 eth_hdr_len;
3934 int tcp_hdr_len, ip_hdr_len;
3935 u8 intf;
3936 struct cpl_rx_pkt *cpl = cplhdr(skb);
3937 struct cpl_pass_accept_req *req;
3938 struct tcp_options_received tmp_opt;
3939 struct c4iw_dev *dev;
3940 enum chip_type type;
3941
3942 dev = *((struct c4iw_dev **) (skb->cb + sizeof(void *)));
3943 /* Store values from cpl_rx_pkt in temporary location. */
3944 vlantag = cpl->vlan;
3945 len = cpl->len;
3946 l2info = cpl->l2info;
3947 hdr_len = cpl->hdr_len;
3948 intf = cpl->iff;
3949
3950 __skb_pull(skb, sizeof(*req) + sizeof(struct rss_header));
3951
3952 /*
3953 * We need to parse the TCP options from SYN packet.
3954 * to generate cpl_pass_accept_req.
3955 */
3956 memset(&tmp_opt, 0, sizeof(tmp_opt));
3957 tcp_clear_options(&tmp_opt);
3958 tcp_parse_options(&init_net, skb, &tmp_opt, 0, NULL);
3959
3960 req = __skb_push(skb, sizeof(*req));
3961 memset(req, 0, sizeof(*req));
3962 req->l2info = cpu_to_be16(SYN_INTF_V(intf) |
3963 SYN_MAC_IDX_V(RX_MACIDX_G(
3964 be32_to_cpu(l2info))) |
3965 SYN_XACT_MATCH_F);
3966 type = dev->rdev.lldi.adapter_type;
3967 tcp_hdr_len = RX_TCPHDR_LEN_G(be16_to_cpu(hdr_len));
3968 ip_hdr_len = RX_IPHDR_LEN_G(be16_to_cpu(hdr_len));
3969 req->hdr_len =
3970 cpu_to_be32(SYN_RX_CHAN_V(RX_CHAN_G(be32_to_cpu(l2info))));
3971 if (CHELSIO_CHIP_VERSION(type) <= CHELSIO_T5) {
3972 eth_hdr_len = is_t4(type) ?
3973 RX_ETHHDR_LEN_G(be32_to_cpu(l2info)) :
3974 RX_T5_ETHHDR_LEN_G(be32_to_cpu(l2info));
3975 req->hdr_len |= cpu_to_be32(TCP_HDR_LEN_V(tcp_hdr_len) |
3976 IP_HDR_LEN_V(ip_hdr_len) |
3977 ETH_HDR_LEN_V(eth_hdr_len));
3978 } else { /* T6 and later */
3979 eth_hdr_len = RX_T6_ETHHDR_LEN_G(be32_to_cpu(l2info));
3980 req->hdr_len |= cpu_to_be32(T6_TCP_HDR_LEN_V(tcp_hdr_len) |
3981 T6_IP_HDR_LEN_V(ip_hdr_len) |
3982 T6_ETH_HDR_LEN_V(eth_hdr_len));
3983 }
3984 req->vlan = vlantag;
3985 req->len = len;
3986 req->tos_stid = cpu_to_be32(PASS_OPEN_TID_V(stid) |
3987 PASS_OPEN_TOS_V(tos));
3988 req->tcpopt.mss = htons(tmp_opt.mss_clamp);
3989 if (tmp_opt.wscale_ok)
3990 req->tcpopt.wsf = tmp_opt.snd_wscale;
3991 req->tcpopt.tstamp = tmp_opt.saw_tstamp;
3992 if (tmp_opt.sack_ok)
3993 req->tcpopt.sack = 1;
3994 OPCODE_TID(req) = htonl(MK_OPCODE_TID(CPL_PASS_ACCEPT_REQ, 0));
3995 return;
3996 }
3997
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)3998 static void send_fw_pass_open_req(struct c4iw_dev *dev, struct sk_buff *skb,
3999 __be32 laddr, __be16 lport,
4000 __be32 raddr, __be16 rport,
4001 u32 rcv_isn, u32 filter, u16 window,
4002 u32 rss_qid, u8 port_id)
4003 {
4004 struct sk_buff *req_skb;
4005 struct fw_ofld_connection_wr *req;
4006 struct cpl_pass_accept_req *cpl = cplhdr(skb);
4007 int ret;
4008
4009 req_skb = alloc_skb(sizeof(struct fw_ofld_connection_wr), GFP_KERNEL);
4010 if (!req_skb)
4011 return;
4012 req = __skb_put_zero(req_skb, sizeof(*req));
4013 req->op_compl = htonl(WR_OP_V(FW_OFLD_CONNECTION_WR) | FW_WR_COMPL_F);
4014 req->len16_pkd = htonl(FW_WR_LEN16_V(DIV_ROUND_UP(sizeof(*req), 16)));
4015 req->le.version_cpl = htonl(FW_OFLD_CONNECTION_WR_CPL_F);
4016 req->le.filter = (__force __be32) filter;
4017 req->le.lport = lport;
4018 req->le.pport = rport;
4019 req->le.u.ipv4.lip = laddr;
4020 req->le.u.ipv4.pip = raddr;
4021 req->tcb.rcv_nxt = htonl(rcv_isn + 1);
4022 req->tcb.rcv_adv = htons(window);
4023 req->tcb.t_state_to_astid =
4024 htonl(FW_OFLD_CONNECTION_WR_T_STATE_V(TCP_SYN_RECV) |
4025 FW_OFLD_CONNECTION_WR_RCV_SCALE_V(cpl->tcpopt.wsf) |
4026 FW_OFLD_CONNECTION_WR_ASTID_V(
4027 PASS_OPEN_TID_G(ntohl(cpl->tos_stid))));
4028
4029 /*
4030 * We store the qid in opt2 which will be used by the firmware
4031 * to send us the wr response.
4032 */
4033 req->tcb.opt2 = htonl(RSS_QUEUE_V(rss_qid));
4034
4035 /*
4036 * We initialize the MSS index in TCB to 0xF.
4037 * So that when driver sends cpl_pass_accept_rpl
4038 * TCB picks up the correct value. If this was 0
4039 * TP will ignore any value > 0 for MSS index.
4040 */
4041 req->tcb.opt0 = cpu_to_be64(MSS_IDX_V(0xF));
4042 req->cookie = (uintptr_t)skb;
4043
4044 set_wr_txq(req_skb, CPL_PRIORITY_CONTROL, port_id);
4045 ret = cxgb4_ofld_send(dev->rdev.lldi.ports[0], req_skb);
4046 if (ret < 0) {
4047 pr_err("%s - cxgb4_ofld_send error %d - dropping\n", __func__,
4048 ret);
4049 kfree_skb(skb);
4050 kfree_skb(req_skb);
4051 }
4052 }
4053
4054 /*
4055 * Handler for CPL_RX_PKT message. Need to handle cpl_rx_pkt
4056 * messages when a filter is being used instead of server to
4057 * redirect a syn packet. When packets hit filter they are redirected
4058 * to the offload queue and driver tries to establish the connection
4059 * using firmware work request.
4060 */
rx_pkt(struct c4iw_dev * dev,struct sk_buff * skb)4061 static int rx_pkt(struct c4iw_dev *dev, struct sk_buff *skb)
4062 {
4063 int stid;
4064 unsigned int filter;
4065 struct ethhdr *eh = NULL;
4066 struct vlan_ethhdr *vlan_eh = NULL;
4067 struct iphdr *iph;
4068 struct tcphdr *tcph;
4069 struct rss_header *rss = (void *)skb->data;
4070 struct cpl_rx_pkt *cpl = (void *)skb->data;
4071 struct cpl_pass_accept_req *req = (void *)(rss + 1);
4072 struct l2t_entry *e;
4073 struct dst_entry *dst;
4074 struct c4iw_ep *lep = NULL;
4075 u16 window;
4076 struct port_info *pi;
4077 struct net_device *pdev;
4078 u16 rss_qid, eth_hdr_len;
4079 int step;
4080 struct neighbour *neigh;
4081
4082 /* Drop all non-SYN packets */
4083 if (!(cpl->l2info & cpu_to_be32(RXF_SYN_F)))
4084 goto reject;
4085
4086 /*
4087 * Drop all packets which did not hit the filter.
4088 * Unlikely to happen.
4089 */
4090 if (!(rss->filter_hit && rss->filter_tid))
4091 goto reject;
4092
4093 /*
4094 * Calculate the server tid from filter hit index from cpl_rx_pkt.
4095 */
4096 stid = (__force int) cpu_to_be32((__force u32) rss->hash_val);
4097
4098 lep = (struct c4iw_ep *)get_ep_from_stid(dev, stid);
4099 if (!lep) {
4100 pr_warn("%s connect request on invalid stid %d\n",
4101 __func__, stid);
4102 goto reject;
4103 }
4104
4105 switch (CHELSIO_CHIP_VERSION(dev->rdev.lldi.adapter_type)) {
4106 case CHELSIO_T4:
4107 eth_hdr_len = RX_ETHHDR_LEN_G(be32_to_cpu(cpl->l2info));
4108 break;
4109 case CHELSIO_T5:
4110 eth_hdr_len = RX_T5_ETHHDR_LEN_G(be32_to_cpu(cpl->l2info));
4111 break;
4112 case CHELSIO_T6:
4113 eth_hdr_len = RX_T6_ETHHDR_LEN_G(be32_to_cpu(cpl->l2info));
4114 break;
4115 default:
4116 pr_err("T%d Chip is not supported\n",
4117 CHELSIO_CHIP_VERSION(dev->rdev.lldi.adapter_type));
4118 goto reject;
4119 }
4120
4121 if (eth_hdr_len == ETH_HLEN) {
4122 eh = (struct ethhdr *)(req + 1);
4123 iph = (struct iphdr *)(eh + 1);
4124 } else {
4125 vlan_eh = (struct vlan_ethhdr *)(req + 1);
4126 iph = (struct iphdr *)(vlan_eh + 1);
4127 __vlan_hwaccel_put_tag(skb, htons(ETH_P_8021Q), ntohs(cpl->vlan));
4128 }
4129
4130 if (iph->version != 0x4)
4131 goto reject;
4132
4133 tcph = (struct tcphdr *)(iph + 1);
4134 skb_set_network_header(skb, (void *)iph - (void *)rss);
4135 skb_set_transport_header(skb, (void *)tcph - (void *)rss);
4136 skb_get(skb);
4137
4138 pr_debug("lip 0x%x lport %u pip 0x%x pport %u tos %d\n",
4139 ntohl(iph->daddr), ntohs(tcph->dest), ntohl(iph->saddr),
4140 ntohs(tcph->source), iph->tos);
4141
4142 dst = cxgb_find_route(&dev->rdev.lldi, get_real_dev,
4143 iph->daddr, iph->saddr, tcph->dest,
4144 tcph->source, iph->tos);
4145 if (!dst) {
4146 pr_err("%s - failed to find dst entry!\n", __func__);
4147 goto reject;
4148 }
4149 neigh = dst_neigh_lookup_skb(dst, skb);
4150
4151 if (!neigh) {
4152 pr_err("%s - failed to allocate neigh!\n", __func__);
4153 goto free_dst;
4154 }
4155
4156 if (neigh->dev->flags & IFF_LOOPBACK) {
4157 pdev = ip_dev_find(&init_net, iph->daddr);
4158 if (!pdev) {
4159 pr_err("%s - failed to find device!\n", __func__);
4160 goto free_dst;
4161 }
4162 e = cxgb4_l2t_get(dev->rdev.lldi.l2t, neigh,
4163 pdev, 0);
4164 pi = (struct port_info *)netdev_priv(pdev);
4165 dev_put(pdev);
4166 } else {
4167 pdev = get_real_dev(neigh->dev);
4168 e = cxgb4_l2t_get(dev->rdev.lldi.l2t, neigh,
4169 pdev, 0);
4170 pi = (struct port_info *)netdev_priv(pdev);
4171 }
4172 neigh_release(neigh);
4173 if (!e) {
4174 pr_err("%s - failed to allocate l2t entry!\n",
4175 __func__);
4176 goto free_dst;
4177 }
4178
4179 step = dev->rdev.lldi.nrxq / dev->rdev.lldi.nchan;
4180 rss_qid = dev->rdev.lldi.rxq_ids[pi->port_id * step];
4181 window = (__force u16) htons((__force u16)tcph->window);
4182
4183 /* Calcuate filter portion for LE region. */
4184 filter = (__force unsigned int) cpu_to_be32(cxgb4_select_ntuple(
4185 dev->rdev.lldi.ports[0],
4186 e));
4187
4188 /*
4189 * Synthesize the cpl_pass_accept_req. We have everything except the
4190 * TID. Once firmware sends a reply with TID we update the TID field
4191 * in cpl and pass it through the regular cpl_pass_accept_req path.
4192 */
4193 build_cpl_pass_accept_req(skb, stid, iph->tos);
4194 send_fw_pass_open_req(dev, skb, iph->daddr, tcph->dest, iph->saddr,
4195 tcph->source, ntohl(tcph->seq), filter, window,
4196 rss_qid, pi->port_id);
4197 cxgb4_l2t_release(e);
4198 free_dst:
4199 dst_release(dst);
4200 reject:
4201 if (lep)
4202 c4iw_put_ep(&lep->com);
4203 return 0;
4204 }
4205
4206 /*
4207 * These are the real handlers that are called from a
4208 * work queue.
4209 */
4210 static c4iw_handler_func work_handlers[NUM_CPL_CMDS + NUM_FAKE_CPLS] = {
4211 [CPL_ACT_ESTABLISH] = act_establish,
4212 [CPL_ACT_OPEN_RPL] = act_open_rpl,
4213 [CPL_RX_DATA] = rx_data,
4214 [CPL_ABORT_RPL_RSS] = abort_rpl,
4215 [CPL_ABORT_RPL] = abort_rpl,
4216 [CPL_PASS_OPEN_RPL] = pass_open_rpl,
4217 [CPL_CLOSE_LISTSRV_RPL] = close_listsrv_rpl,
4218 [CPL_PASS_ACCEPT_REQ] = pass_accept_req,
4219 [CPL_PASS_ESTABLISH] = pass_establish,
4220 [CPL_PEER_CLOSE] = peer_close,
4221 [CPL_ABORT_REQ_RSS] = peer_abort,
4222 [CPL_CLOSE_CON_RPL] = close_con_rpl,
4223 [CPL_RDMA_TERMINATE] = terminate,
4224 [CPL_FW4_ACK] = fw4_ack,
4225 [CPL_GET_TCB_RPL] = read_tcb_rpl,
4226 [CPL_FW6_MSG] = deferred_fw6_msg,
4227 [CPL_RX_PKT] = rx_pkt,
4228 [FAKE_CPL_PUT_EP_SAFE] = _put_ep_safe,
4229 [FAKE_CPL_PASS_PUT_EP_SAFE] = _put_pass_ep_safe
4230 };
4231
process_timeout(struct c4iw_ep * ep)4232 static void process_timeout(struct c4iw_ep *ep)
4233 {
4234 struct c4iw_qp_attributes attrs;
4235 int abort = 1;
4236
4237 mutex_lock(&ep->com.mutex);
4238 pr_debug("ep %p tid %u state %d\n", ep, ep->hwtid, ep->com.state);
4239 set_bit(TIMEDOUT, &ep->com.history);
4240 switch (ep->com.state) {
4241 case MPA_REQ_SENT:
4242 connect_reply_upcall(ep, -ETIMEDOUT);
4243 break;
4244 case MPA_REQ_WAIT:
4245 case MPA_REQ_RCVD:
4246 case MPA_REP_SENT:
4247 case FPDU_MODE:
4248 break;
4249 case CLOSING:
4250 case MORIBUND:
4251 if (ep->com.cm_id && ep->com.qp) {
4252 attrs.next_state = C4IW_QP_STATE_ERROR;
4253 c4iw_modify_qp(ep->com.qp->rhp,
4254 ep->com.qp, C4IW_QP_ATTR_NEXT_STATE,
4255 &attrs, 1);
4256 }
4257 close_complete_upcall(ep, -ETIMEDOUT);
4258 break;
4259 case ABORTING:
4260 case DEAD:
4261
4262 /*
4263 * These states are expected if the ep timed out at the same
4264 * time as another thread was calling stop_ep_timer().
4265 * So we silently do nothing for these states.
4266 */
4267 abort = 0;
4268 break;
4269 default:
4270 WARN(1, "%s unexpected state ep %p tid %u state %u\n",
4271 __func__, ep, ep->hwtid, ep->com.state);
4272 abort = 0;
4273 }
4274 mutex_unlock(&ep->com.mutex);
4275 if (abort)
4276 c4iw_ep_disconnect(ep, 1, GFP_KERNEL);
4277 c4iw_put_ep(&ep->com);
4278 }
4279
process_timedout_eps(void)4280 static void process_timedout_eps(void)
4281 {
4282 struct c4iw_ep *ep;
4283
4284 spin_lock_irq(&timeout_lock);
4285 while (!list_empty(&timeout_list)) {
4286 struct list_head *tmp;
4287
4288 tmp = timeout_list.next;
4289 list_del(tmp);
4290 tmp->next = NULL;
4291 tmp->prev = NULL;
4292 spin_unlock_irq(&timeout_lock);
4293 ep = list_entry(tmp, struct c4iw_ep, entry);
4294 process_timeout(ep);
4295 spin_lock_irq(&timeout_lock);
4296 }
4297 spin_unlock_irq(&timeout_lock);
4298 }
4299
process_work(struct work_struct * work)4300 static void process_work(struct work_struct *work)
4301 {
4302 struct sk_buff *skb = NULL;
4303 struct c4iw_dev *dev;
4304 struct cpl_act_establish *rpl;
4305 unsigned int opcode;
4306 int ret;
4307
4308 process_timedout_eps();
4309 while ((skb = skb_dequeue(&rxq))) {
4310 rpl = cplhdr(skb);
4311 dev = *((struct c4iw_dev **) (skb->cb + sizeof(void *)));
4312 opcode = rpl->ot.opcode;
4313
4314 if (opcode >= ARRAY_SIZE(work_handlers) ||
4315 !work_handlers[opcode]) {
4316 pr_err("No handler for opcode 0x%x.\n", opcode);
4317 kfree_skb(skb);
4318 } else {
4319 ret = work_handlers[opcode](dev, skb);
4320 if (!ret)
4321 kfree_skb(skb);
4322 }
4323 process_timedout_eps();
4324 }
4325 }
4326
4327 static DECLARE_WORK(skb_work, process_work);
4328
ep_timeout(struct timer_list * t)4329 static void ep_timeout(struct timer_list *t)
4330 {
4331 struct c4iw_ep *ep = from_timer(ep, t, timer);
4332 int kickit = 0;
4333
4334 spin_lock(&timeout_lock);
4335 if (!test_and_set_bit(TIMEOUT, &ep->com.flags)) {
4336 /*
4337 * Only insert if it is not already on the list.
4338 */
4339 if (!ep->entry.next) {
4340 list_add_tail(&ep->entry, &timeout_list);
4341 kickit = 1;
4342 }
4343 }
4344 spin_unlock(&timeout_lock);
4345 if (kickit)
4346 queue_work(workq, &skb_work);
4347 }
4348
4349 /*
4350 * All the CM events are handled on a work queue to have a safe context.
4351 */
sched(struct c4iw_dev * dev,struct sk_buff * skb)4352 static int sched(struct c4iw_dev *dev, struct sk_buff *skb)
4353 {
4354
4355 /*
4356 * Save dev in the skb->cb area.
4357 */
4358 *((struct c4iw_dev **) (skb->cb + sizeof(void *))) = dev;
4359
4360 /*
4361 * Queue the skb and schedule the worker thread.
4362 */
4363 skb_queue_tail(&rxq, skb);
4364 queue_work(workq, &skb_work);
4365 return 0;
4366 }
4367
set_tcb_rpl(struct c4iw_dev * dev,struct sk_buff * skb)4368 static int set_tcb_rpl(struct c4iw_dev *dev, struct sk_buff *skb)
4369 {
4370 struct cpl_set_tcb_rpl *rpl = cplhdr(skb);
4371
4372 if (rpl->status != CPL_ERR_NONE) {
4373 pr_err("Unexpected SET_TCB_RPL status %u for tid %u\n",
4374 rpl->status, GET_TID(rpl));
4375 }
4376 kfree_skb(skb);
4377 return 0;
4378 }
4379
fw6_msg(struct c4iw_dev * dev,struct sk_buff * skb)4380 static int fw6_msg(struct c4iw_dev *dev, struct sk_buff *skb)
4381 {
4382 struct cpl_fw6_msg *rpl = cplhdr(skb);
4383 struct c4iw_wr_wait *wr_waitp;
4384 int ret;
4385
4386 pr_debug("type %u\n", rpl->type);
4387
4388 switch (rpl->type) {
4389 case FW6_TYPE_WR_RPL:
4390 ret = (int)((be64_to_cpu(rpl->data[0]) >> 8) & 0xff);
4391 wr_waitp = (struct c4iw_wr_wait *)(__force unsigned long) rpl->data[1];
4392 pr_debug("wr_waitp %p ret %u\n", wr_waitp, ret);
4393 if (wr_waitp)
4394 c4iw_wake_up_deref(wr_waitp, ret ? -ret : 0);
4395 kfree_skb(skb);
4396 break;
4397 case FW6_TYPE_CQE:
4398 case FW6_TYPE_OFLD_CONNECTION_WR_RPL:
4399 sched(dev, skb);
4400 break;
4401 default:
4402 pr_err("%s unexpected fw6 msg type %u\n",
4403 __func__, rpl->type);
4404 kfree_skb(skb);
4405 break;
4406 }
4407 return 0;
4408 }
4409
peer_abort_intr(struct c4iw_dev * dev,struct sk_buff * skb)4410 static int peer_abort_intr(struct c4iw_dev *dev, struct sk_buff *skb)
4411 {
4412 struct cpl_abort_req_rss *req = cplhdr(skb);
4413 struct c4iw_ep *ep;
4414 unsigned int tid = GET_TID(req);
4415
4416 ep = get_ep_from_tid(dev, tid);
4417 /* This EP will be dereferenced in peer_abort() */
4418 if (!ep) {
4419 pr_warn("Abort on non-existent endpoint, tid %d\n", tid);
4420 kfree_skb(skb);
4421 return 0;
4422 }
4423 if (cxgb_is_neg_adv(req->status)) {
4424 pr_debug("Negative advice on abort- tid %u status %d (%s)\n",
4425 ep->hwtid, req->status,
4426 neg_adv_str(req->status));
4427 goto out;
4428 }
4429 pr_debug("ep %p tid %u state %u\n", ep, ep->hwtid, ep->com.state);
4430
4431 c4iw_wake_up_noref(ep->com.wr_waitp, -ECONNRESET);
4432 out:
4433 sched(dev, skb);
4434 return 0;
4435 }
4436
4437 /*
4438 * Most upcalls from the T4 Core go to sched() to
4439 * schedule the processing on a work queue.
4440 */
4441 c4iw_handler_func c4iw_handlers[NUM_CPL_CMDS] = {
4442 [CPL_ACT_ESTABLISH] = sched,
4443 [CPL_ACT_OPEN_RPL] = sched,
4444 [CPL_RX_DATA] = sched,
4445 [CPL_ABORT_RPL_RSS] = sched,
4446 [CPL_ABORT_RPL] = sched,
4447 [CPL_PASS_OPEN_RPL] = sched,
4448 [CPL_CLOSE_LISTSRV_RPL] = sched,
4449 [CPL_PASS_ACCEPT_REQ] = sched,
4450 [CPL_PASS_ESTABLISH] = sched,
4451 [CPL_PEER_CLOSE] = sched,
4452 [CPL_CLOSE_CON_RPL] = sched,
4453 [CPL_ABORT_REQ_RSS] = peer_abort_intr,
4454 [CPL_RDMA_TERMINATE] = sched,
4455 [CPL_FW4_ACK] = sched,
4456 [CPL_SET_TCB_RPL] = set_tcb_rpl,
4457 [CPL_GET_TCB_RPL] = sched,
4458 [CPL_FW6_MSG] = fw6_msg,
4459 [CPL_RX_PKT] = sched
4460 };
4461
c4iw_cm_init(void)4462 int __init c4iw_cm_init(void)
4463 {
4464 skb_queue_head_init(&rxq);
4465
4466 workq = alloc_ordered_workqueue("iw_cxgb4", WQ_MEM_RECLAIM);
4467 if (!workq)
4468 return -ENOMEM;
4469
4470 return 0;
4471 }
4472
c4iw_cm_term(void)4473 void c4iw_cm_term(void)
4474 {
4475 WARN_ON(!list_empty(&timeout_list));
4476 destroy_workqueue(workq);
4477 }
4478