1 /*-
2 * SPDX-License-Identifier: BSD-2-Clause
3 *
4 * Copyright (c) 2012 Chelsio Communications, Inc.
5 * All rights reserved.
6 * Written by: Navdeep Parhar <np@FreeBSD.org>
7 *
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
10 * are met:
11 * 1. Redistributions of source code must retain the above copyright
12 * notice, this list of conditions and the following disclaimer.
13 * 2. Redistributions in binary form must reproduce the above copyright
14 * notice, this list of conditions and the following disclaimer in the
15 * documentation and/or other materials provided with the distribution.
16 *
17 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
20 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
27 * SUCH DAMAGE.
28 */
29
30 #include <sys/cdefs.h>
31 #include "opt_inet.h"
32 #include "opt_inet6.h"
33 #include "opt_kern_tls.h"
34 #include "opt_ratelimit.h"
35
36 #include <sys/param.h>
37 #include <sys/types.h>
38 #include <sys/systm.h>
39 #include <sys/kernel.h>
40 #include <sys/ktr.h>
41 #include <sys/lock.h>
42 #include <sys/limits.h>
43 #include <sys/module.h>
44 #include <sys/protosw.h>
45 #include <sys/domain.h>
46 #include <sys/refcount.h>
47 #include <sys/rmlock.h>
48 #include <sys/socket.h>
49 #include <sys/socketvar.h>
50 #include <sys/sysctl.h>
51 #include <sys/taskqueue.h>
52 #include <net/if.h>
53 #include <net/if_var.h>
54 #include <net/if_types.h>
55 #include <net/if_vlan_var.h>
56 #include <netinet/in.h>
57 #include <netinet/in_pcb.h>
58 #include <netinet/in_var.h>
59 #include <netinet/ip.h>
60 #include <netinet/ip6.h>
61 #include <netinet6/scope6_var.h>
62 #define TCPSTATES
63 #include <netinet/tcp_fsm.h>
64 #include <netinet/tcp_timer.h>
65 #include <netinet/tcp_var.h>
66 #include <netinet/toecore.h>
67 #include <netinet/cc/cc.h>
68
69 #ifdef TCP_OFFLOAD
70 #include "common/common.h"
71 #include "common/t4_msg.h"
72 #include "common/t4_regs.h"
73 #include "common/t4_regs_values.h"
74 #include "common/t4_tcb.h"
75 #include "t4_clip.h"
76 #include "tom/t4_tom_l2t.h"
77 #include "tom/t4_tom.h"
78 #include "tom/t4_tls.h"
79
80 static struct protosw *tcp_protosw;
81 static struct protosw toe_protosw;
82 static struct pr_usrreqs toe_usrreqs;
83
84 static struct protosw *tcp6_protosw;
85 static struct protosw toe6_protosw;
86 static struct pr_usrreqs toe6_usrreqs;
87
88 /* Module ops */
89 static int t4_tom_mod_load(void);
90 static int t4_tom_mod_unload(void);
91 static int t4_tom_modevent(module_t, int, void *);
92
93 /* ULD ops and helpers */
94 static int t4_tom_activate(struct adapter *);
95 static int t4_tom_deactivate(struct adapter *);
96
97 static struct uld_info tom_uld_info = {
98 .uld_id = ULD_TOM,
99 .activate = t4_tom_activate,
100 .deactivate = t4_tom_deactivate,
101 };
102
103 static void release_offload_resources(struct toepcb *);
104 static int alloc_tid_tabs(struct tid_info *);
105 static void free_tid_tabs(struct tid_info *);
106 static void free_tom_data(struct adapter *, struct tom_data *);
107 static void reclaim_wr_resources(void *, int);
108
109 struct toepcb *
alloc_toepcb(struct vi_info * vi,int flags)110 alloc_toepcb(struct vi_info *vi, int flags)
111 {
112 struct port_info *pi = vi->pi;
113 struct adapter *sc = pi->adapter;
114 struct toepcb *toep;
115 int tx_credits, txsd_total, len;
116
117 /*
118 * The firmware counts tx work request credits in units of 16 bytes
119 * each. Reserve room for an ABORT_REQ so the driver never has to worry
120 * about tx credits if it wants to abort a connection.
121 */
122 tx_credits = sc->params.ofldq_wr_cred;
123 tx_credits -= howmany(sizeof(struct cpl_abort_req), 16);
124
125 /*
126 * Shortest possible tx work request is a fw_ofld_tx_data_wr + 1 byte
127 * immediate payload, and firmware counts tx work request credits in
128 * units of 16 byte. Calculate the maximum work requests possible.
129 */
130 txsd_total = tx_credits /
131 howmany(sizeof(struct fw_ofld_tx_data_wr) + 1, 16);
132
133 len = offsetof(struct toepcb, txsd) +
134 txsd_total * sizeof(struct ofld_tx_sdesc);
135
136 toep = malloc(len, M_CXGBE, M_ZERO | flags);
137 if (toep == NULL)
138 return (NULL);
139
140 refcount_init(&toep->refcount, 1);
141 toep->td = sc->tom_softc;
142 toep->vi = vi;
143 toep->tid = -1;
144 toep->tx_total = tx_credits;
145 toep->tx_credits = tx_credits;
146 mbufq_init(&toep->ulp_pduq, INT_MAX);
147 mbufq_init(&toep->ulp_pdu_reclaimq, INT_MAX);
148 toep->txsd_total = txsd_total;
149 toep->txsd_avail = txsd_total;
150 toep->txsd_pidx = 0;
151 toep->txsd_cidx = 0;
152 aiotx_init_toep(toep);
153
154 return (toep);
155 }
156
157 /*
158 * Initialize a toepcb after its params have been filled out.
159 */
160 int
init_toepcb(struct vi_info * vi,struct toepcb * toep)161 init_toepcb(struct vi_info *vi, struct toepcb *toep)
162 {
163 struct conn_params *cp = &toep->params;
164 struct port_info *pi = vi->pi;
165 struct adapter *sc = pi->adapter;
166 struct tx_cl_rl_params *tc;
167
168 if (cp->tc_idx >= 0 && cp->tc_idx < sc->params.nsched_cls) {
169 tc = &pi->sched_params->cl_rl[cp->tc_idx];
170 mtx_lock(&sc->tc_lock);
171 if (tc->state != CS_HW_CONFIGURED) {
172 CH_ERR(vi, "tid %d cannot be bound to traffic class %d "
173 "because it is not configured (its state is %d)\n",
174 toep->tid, cp->tc_idx, tc->state);
175 cp->tc_idx = -1;
176 } else {
177 tc->refcount++;
178 }
179 mtx_unlock(&sc->tc_lock);
180 }
181 toep->ofld_txq = &sc->sge.ofld_txq[cp->txq_idx];
182 toep->ofld_rxq = &sc->sge.ofld_rxq[cp->rxq_idx];
183 toep->ctrlq = &sc->sge.ctrlq[pi->port_id];
184
185 tls_init_toep(toep);
186 if (ulp_mode(toep) == ULP_MODE_TCPDDP)
187 ddp_init_toep(toep);
188
189 toep->flags |= TPF_INITIALIZED;
190
191 return (0);
192 }
193
194 struct toepcb *
hold_toepcb(struct toepcb * toep)195 hold_toepcb(struct toepcb *toep)
196 {
197
198 refcount_acquire(&toep->refcount);
199 return (toep);
200 }
201
202 void
free_toepcb(struct toepcb * toep)203 free_toepcb(struct toepcb *toep)
204 {
205
206 if (refcount_release(&toep->refcount) == 0)
207 return;
208
209 KASSERT(!(toep->flags & TPF_ATTACHED),
210 ("%s: attached to an inpcb", __func__));
211 KASSERT(!(toep->flags & TPF_CPL_PENDING),
212 ("%s: CPL pending", __func__));
213
214 if (toep->flags & TPF_INITIALIZED) {
215 if (ulp_mode(toep) == ULP_MODE_TCPDDP)
216 ddp_uninit_toep(toep);
217 tls_uninit_toep(toep);
218 }
219 free(toep, M_CXGBE);
220 }
221
222 /*
223 * Set up the socket for TCP offload.
224 */
225 void
offload_socket(struct socket * so,struct toepcb * toep)226 offload_socket(struct socket *so, struct toepcb *toep)
227 {
228 struct tom_data *td = toep->td;
229 struct inpcb *inp = sotoinpcb(so);
230 struct tcpcb *tp = intotcpcb(inp);
231 struct sockbuf *sb;
232
233 INP_WLOCK_ASSERT(inp);
234
235 /* Update socket */
236 sb = &so->so_snd;
237 SOCKBUF_LOCK(sb);
238 sb->sb_flags |= SB_NOCOALESCE;
239 SOCKBUF_UNLOCK(sb);
240 sb = &so->so_rcv;
241 SOCKBUF_LOCK(sb);
242 sb->sb_flags |= SB_NOCOALESCE;
243 if (inp->inp_vflag & INP_IPV6)
244 so->so_proto = &toe6_protosw;
245 else
246 so->so_proto = &toe_protosw;
247 SOCKBUF_UNLOCK(sb);
248
249 /* Update TCP PCB */
250 tp->tod = &td->tod;
251 tp->t_toe = toep;
252 tp->t_flags |= TF_TOE;
253
254 /* Install an extra hold on inp */
255 toep->inp = inp;
256 toep->flags |= TPF_ATTACHED;
257 in_pcbref(inp);
258
259 /* Add the TOE PCB to the active list */
260 mtx_lock(&td->toep_list_lock);
261 TAILQ_INSERT_HEAD(&td->toep_list, toep, link);
262 mtx_unlock(&td->toep_list_lock);
263 }
264
265 void
restore_so_proto(struct socket * so,bool v6)266 restore_so_proto(struct socket *so, bool v6)
267 {
268 if (v6)
269 so->so_proto = tcp6_protosw;
270 else
271 so->so_proto = tcp_protosw;
272 }
273
274 /* This is _not_ the normal way to "unoffload" a socket. */
275 void
undo_offload_socket(struct socket * so)276 undo_offload_socket(struct socket *so)
277 {
278 struct inpcb *inp = sotoinpcb(so);
279 struct tcpcb *tp = intotcpcb(inp);
280 struct toepcb *toep = tp->t_toe;
281 struct tom_data *td = toep->td;
282 struct sockbuf *sb;
283
284 INP_WLOCK_ASSERT(inp);
285
286 sb = &so->so_snd;
287 SOCKBUF_LOCK(sb);
288 sb->sb_flags &= ~SB_NOCOALESCE;
289 SOCKBUF_UNLOCK(sb);
290 sb = &so->so_rcv;
291 SOCKBUF_LOCK(sb);
292 sb->sb_flags &= ~SB_NOCOALESCE;
293 restore_so_proto(so, inp->inp_vflag & INP_IPV6);
294 SOCKBUF_UNLOCK(sb);
295
296 tp->tod = NULL;
297 tp->t_toe = NULL;
298 tp->t_flags &= ~TF_TOE;
299
300 toep->inp = NULL;
301 toep->flags &= ~TPF_ATTACHED;
302 if (in_pcbrele_wlocked(inp))
303 panic("%s: inp freed.", __func__);
304
305 mtx_lock(&td->toep_list_lock);
306 TAILQ_REMOVE(&td->toep_list, toep, link);
307 mtx_unlock(&td->toep_list_lock);
308 }
309
310 static void
release_offload_resources(struct toepcb * toep)311 release_offload_resources(struct toepcb *toep)
312 {
313 struct tom_data *td = toep->td;
314 struct adapter *sc = td_adapter(td);
315 int tid = toep->tid;
316
317 KASSERT(!(toep->flags & TPF_CPL_PENDING),
318 ("%s: %p has CPL pending.", __func__, toep));
319 KASSERT(!(toep->flags & TPF_ATTACHED),
320 ("%s: %p is still attached.", __func__, toep));
321
322 CTR5(KTR_CXGBE, "%s: toep %p (tid %d, l2te %p, ce %p)",
323 __func__, toep, tid, toep->l2te, toep->ce);
324
325 /*
326 * These queues should have been emptied at approximately the same time
327 * that a normal connection's socket's so_snd would have been purged or
328 * drained. Do _not_ clean up here.
329 */
330 MPASS(mbufq_empty(&toep->ulp_pduq));
331 MPASS(mbufq_empty(&toep->ulp_pdu_reclaimq));
332 #ifdef INVARIANTS
333 if (ulp_mode(toep) == ULP_MODE_TCPDDP)
334 ddp_assert_empty(toep);
335 #endif
336 MPASS(TAILQ_EMPTY(&toep->aiotx_jobq));
337
338 if (toep->l2te)
339 t4_l2t_release(toep->l2te);
340
341 if (tid >= 0) {
342 remove_tid(sc, tid, toep->ce ? 2 : 1);
343 release_tid(sc, tid, toep->ctrlq);
344 }
345
346 if (toep->ce)
347 t4_release_clip_entry(sc, toep->ce);
348
349 if (toep->params.tc_idx != -1)
350 t4_release_cl_rl(sc, toep->vi->pi->port_id, toep->params.tc_idx);
351
352 mtx_lock(&td->toep_list_lock);
353 TAILQ_REMOVE(&td->toep_list, toep, link);
354 mtx_unlock(&td->toep_list_lock);
355
356 free_toepcb(toep);
357 }
358
359 /*
360 * The kernel is done with the TCP PCB and this is our opportunity to unhook the
361 * toepcb hanging off of it. If the TOE driver is also done with the toepcb (no
362 * pending CPL) then it is time to release all resources tied to the toepcb.
363 *
364 * Also gets called when an offloaded active open fails and the TOM wants the
365 * kernel to take the TCP PCB back.
366 */
367 static void
t4_pcb_detach(struct toedev * tod __unused,struct tcpcb * tp)368 t4_pcb_detach(struct toedev *tod __unused, struct tcpcb *tp)
369 {
370 #if defined(KTR) || defined(INVARIANTS)
371 struct inpcb *inp = tp->t_inpcb;
372 #endif
373 struct toepcb *toep = tp->t_toe;
374
375 INP_WLOCK_ASSERT(inp);
376
377 KASSERT(toep != NULL, ("%s: toep is NULL", __func__));
378 KASSERT(toep->flags & TPF_ATTACHED,
379 ("%s: not attached", __func__));
380
381 #ifdef KTR
382 if (tp->t_state == TCPS_SYN_SENT) {
383 CTR6(KTR_CXGBE, "%s: atid %d, toep %p (0x%x), inp %p (0x%x)",
384 __func__, toep->tid, toep, toep->flags, inp,
385 inp->inp_flags);
386 } else {
387 CTR6(KTR_CXGBE,
388 "t4_pcb_detach: tid %d (%s), toep %p (0x%x), inp %p (0x%x)",
389 toep->tid, tcpstates[tp->t_state], toep, toep->flags, inp,
390 inp->inp_flags);
391 }
392 #endif
393
394 if (ulp_mode(toep) == ULP_MODE_TLS)
395 tls_detach(toep);
396
397 tp->tod = NULL;
398 tp->t_toe = NULL;
399 tp->t_flags &= ~TF_TOE;
400 toep->flags &= ~TPF_ATTACHED;
401
402 if (!(toep->flags & TPF_CPL_PENDING))
403 release_offload_resources(toep);
404 }
405
406 /*
407 * setsockopt handler.
408 */
409 static void
t4_ctloutput(struct toedev * tod,struct tcpcb * tp,int dir,int name)410 t4_ctloutput(struct toedev *tod, struct tcpcb *tp, int dir, int name)
411 {
412 struct adapter *sc = tod->tod_softc;
413 struct toepcb *toep = tp->t_toe;
414
415 if (dir == SOPT_GET)
416 return;
417
418 CTR4(KTR_CXGBE, "%s: tp %p, dir %u, name %u", __func__, tp, dir, name);
419
420 switch (name) {
421 case TCP_NODELAY:
422 if (tp->t_state != TCPS_ESTABLISHED)
423 break;
424 toep->params.nagle = tp->t_flags & TF_NODELAY ? 0 : 1;
425 t4_set_tcb_field(sc, toep->ctrlq, toep, W_TCB_T_FLAGS,
426 V_TF_NAGLE(1), V_TF_NAGLE(toep->params.nagle), 0, 0);
427 break;
428 default:
429 break;
430 }
431 }
432
433 static inline uint64_t
get_tcb_tflags(const uint64_t * tcb)434 get_tcb_tflags(const uint64_t *tcb)
435 {
436
437 return ((be64toh(tcb[14]) << 32) | (be64toh(tcb[15]) >> 32));
438 }
439
440 static inline uint32_t
get_tcb_field(const uint64_t * tcb,u_int word,uint32_t mask,u_int shift)441 get_tcb_field(const uint64_t *tcb, u_int word, uint32_t mask, u_int shift)
442 {
443 #define LAST_WORD ((TCB_SIZE / 4) - 1)
444 uint64_t t1, t2;
445 int flit_idx;
446
447 MPASS(mask != 0);
448 MPASS(word <= LAST_WORD);
449 MPASS(shift < 32);
450
451 flit_idx = (LAST_WORD - word) / 2;
452 if (word & 0x1)
453 shift += 32;
454 t1 = be64toh(tcb[flit_idx]) >> shift;
455 t2 = 0;
456 if (fls(mask) > 64 - shift) {
457 /*
458 * Will spill over into the next logical flit, which is the flit
459 * before this one. The flit_idx before this one must be valid.
460 */
461 MPASS(flit_idx > 0);
462 t2 = be64toh(tcb[flit_idx - 1]) << (64 - shift);
463 }
464 return ((t2 | t1) & mask);
465 #undef LAST_WORD
466 }
467 #define GET_TCB_FIELD(tcb, F) \
468 get_tcb_field(tcb, W_TCB_##F, M_TCB_##F, S_TCB_##F)
469
470 /*
471 * Issues a CPL_GET_TCB to read the entire TCB for the tid.
472 */
473 static int
send_get_tcb(struct adapter * sc,u_int tid)474 send_get_tcb(struct adapter *sc, u_int tid)
475 {
476 struct cpl_get_tcb *cpl;
477 struct wrq_cookie cookie;
478
479 MPASS(tid >= sc->tids.tid_base);
480 MPASS(tid - sc->tids.tid_base < sc->tids.ntids);
481
482 cpl = start_wrq_wr(&sc->sge.ctrlq[0], howmany(sizeof(*cpl), 16),
483 &cookie);
484 if (__predict_false(cpl == NULL))
485 return (ENOMEM);
486 bzero(cpl, sizeof(*cpl));
487 INIT_TP_WR(cpl, tid);
488 OPCODE_TID(cpl) = htobe32(MK_OPCODE_TID(CPL_GET_TCB, tid));
489 cpl->reply_ctrl = htobe16(V_REPLY_CHAN(0) |
490 V_QUEUENO(sc->sge.ofld_rxq[0].iq.cntxt_id));
491 cpl->cookie = 0xff;
492 commit_wrq_wr(&sc->sge.ctrlq[0], cpl, &cookie);
493
494 return (0);
495 }
496
497 static struct tcb_histent *
alloc_tcb_histent(struct adapter * sc,u_int tid,int flags)498 alloc_tcb_histent(struct adapter *sc, u_int tid, int flags)
499 {
500 struct tcb_histent *te;
501
502 MPASS(flags == M_NOWAIT || flags == M_WAITOK);
503
504 te = malloc(sizeof(*te), M_CXGBE, M_ZERO | flags);
505 if (te == NULL)
506 return (NULL);
507 mtx_init(&te->te_lock, "TCB entry", NULL, MTX_DEF);
508 callout_init_mtx(&te->te_callout, &te->te_lock, 0);
509 te->te_adapter = sc;
510 te->te_tid = tid;
511
512 return (te);
513 }
514
515 static void
free_tcb_histent(struct tcb_histent * te)516 free_tcb_histent(struct tcb_histent *te)
517 {
518
519 mtx_destroy(&te->te_lock);
520 free(te, M_CXGBE);
521 }
522
523 /*
524 * Start tracking the tid in the TCB history.
525 */
526 int
add_tid_to_history(struct adapter * sc,u_int tid)527 add_tid_to_history(struct adapter *sc, u_int tid)
528 {
529 struct tcb_histent *te = NULL;
530 struct tom_data *td = sc->tom_softc;
531 int rc;
532
533 MPASS(tid >= sc->tids.tid_base);
534 MPASS(tid - sc->tids.tid_base < sc->tids.ntids);
535
536 if (td->tcb_history == NULL)
537 return (ENXIO);
538
539 rw_wlock(&td->tcb_history_lock);
540 if (td->tcb_history[tid] != NULL) {
541 rc = EEXIST;
542 goto done;
543 }
544 te = alloc_tcb_histent(sc, tid, M_NOWAIT);
545 if (te == NULL) {
546 rc = ENOMEM;
547 goto done;
548 }
549 mtx_lock(&te->te_lock);
550 rc = send_get_tcb(sc, tid);
551 if (rc == 0) {
552 te->te_flags |= TE_RPL_PENDING;
553 td->tcb_history[tid] = te;
554 } else {
555 free(te, M_CXGBE);
556 }
557 mtx_unlock(&te->te_lock);
558 done:
559 rw_wunlock(&td->tcb_history_lock);
560 return (rc);
561 }
562
563 static void
remove_tcb_histent(struct tcb_histent * te)564 remove_tcb_histent(struct tcb_histent *te)
565 {
566 struct adapter *sc = te->te_adapter;
567 struct tom_data *td = sc->tom_softc;
568
569 rw_assert(&td->tcb_history_lock, RA_WLOCKED);
570 mtx_assert(&te->te_lock, MA_OWNED);
571 MPASS(td->tcb_history[te->te_tid] == te);
572
573 td->tcb_history[te->te_tid] = NULL;
574 free_tcb_histent(te);
575 rw_wunlock(&td->tcb_history_lock);
576 }
577
578 static inline struct tcb_histent *
lookup_tcb_histent(struct adapter * sc,u_int tid,bool addrem)579 lookup_tcb_histent(struct adapter *sc, u_int tid, bool addrem)
580 {
581 struct tcb_histent *te;
582 struct tom_data *td = sc->tom_softc;
583
584 MPASS(tid >= sc->tids.tid_base);
585 MPASS(tid - sc->tids.tid_base < sc->tids.ntids);
586
587 if (td->tcb_history == NULL)
588 return (NULL);
589
590 if (addrem)
591 rw_wlock(&td->tcb_history_lock);
592 else
593 rw_rlock(&td->tcb_history_lock);
594 te = td->tcb_history[tid];
595 if (te != NULL) {
596 mtx_lock(&te->te_lock);
597 return (te); /* with both locks held */
598 }
599 if (addrem)
600 rw_wunlock(&td->tcb_history_lock);
601 else
602 rw_runlock(&td->tcb_history_lock);
603
604 return (te);
605 }
606
607 static inline void
release_tcb_histent(struct tcb_histent * te)608 release_tcb_histent(struct tcb_histent *te)
609 {
610 struct adapter *sc = te->te_adapter;
611 struct tom_data *td = sc->tom_softc;
612
613 mtx_assert(&te->te_lock, MA_OWNED);
614 mtx_unlock(&te->te_lock);
615 rw_assert(&td->tcb_history_lock, RA_RLOCKED);
616 rw_runlock(&td->tcb_history_lock);
617 }
618
619 static void
request_tcb(void * arg)620 request_tcb(void *arg)
621 {
622 struct tcb_histent *te = arg;
623
624 mtx_assert(&te->te_lock, MA_OWNED);
625
626 /* Noone else is supposed to update the histent. */
627 MPASS(!(te->te_flags & TE_RPL_PENDING));
628 if (send_get_tcb(te->te_adapter, te->te_tid) == 0)
629 te->te_flags |= TE_RPL_PENDING;
630 else
631 callout_schedule(&te->te_callout, hz / 100);
632 }
633
634 static void
update_tcb_histent(struct tcb_histent * te,const uint64_t * tcb)635 update_tcb_histent(struct tcb_histent *te, const uint64_t *tcb)
636 {
637 struct tom_data *td = te->te_adapter->tom_softc;
638 uint64_t tflags = get_tcb_tflags(tcb);
639 uint8_t sample = 0;
640
641 if (GET_TCB_FIELD(tcb, SND_MAX_RAW) != GET_TCB_FIELD(tcb, SND_UNA_RAW)) {
642 if (GET_TCB_FIELD(tcb, T_RXTSHIFT) != 0)
643 sample |= TS_RTO;
644 if (GET_TCB_FIELD(tcb, T_DUPACKS) != 0)
645 sample |= TS_DUPACKS;
646 if (GET_TCB_FIELD(tcb, T_DUPACKS) >= td->dupack_threshold)
647 sample |= TS_FASTREXMT;
648 }
649
650 if (GET_TCB_FIELD(tcb, SND_MAX_RAW) != 0) {
651 uint32_t snd_wnd;
652
653 sample |= TS_SND_BACKLOGGED; /* for whatever reason. */
654
655 snd_wnd = GET_TCB_FIELD(tcb, RCV_ADV);
656 if (tflags & V_TF_RECV_SCALE(1))
657 snd_wnd <<= GET_TCB_FIELD(tcb, RCV_SCALE);
658 if (GET_TCB_FIELD(tcb, SND_CWND) < snd_wnd)
659 sample |= TS_CWND_LIMITED; /* maybe due to CWND */
660 }
661
662 if (tflags & V_TF_CCTRL_ECN(1)) {
663
664 /*
665 * CE marker on incoming IP hdr, echoing ECE back in the TCP
666 * hdr. Indicates congestion somewhere on the way from the peer
667 * to this node.
668 */
669 if (tflags & V_TF_CCTRL_ECE(1))
670 sample |= TS_ECN_ECE;
671
672 /*
673 * ECE seen and CWR sent (or about to be sent). Might indicate
674 * congestion on the way to the peer. This node is reducing its
675 * congestion window in response.
676 */
677 if (tflags & (V_TF_CCTRL_CWR(1) | V_TF_CCTRL_RFR(1)))
678 sample |= TS_ECN_CWR;
679 }
680
681 te->te_sample[te->te_pidx] = sample;
682 if (++te->te_pidx == nitems(te->te_sample))
683 te->te_pidx = 0;
684 memcpy(te->te_tcb, tcb, TCB_SIZE);
685 te->te_flags |= TE_ACTIVE;
686 }
687
688 static int
do_get_tcb_rpl(struct sge_iq * iq,const struct rss_header * rss,struct mbuf * m)689 do_get_tcb_rpl(struct sge_iq *iq, const struct rss_header *rss, struct mbuf *m)
690 {
691 struct adapter *sc = iq->adapter;
692 const struct cpl_get_tcb_rpl *cpl = mtod(m, const void *);
693 const uint64_t *tcb = (const uint64_t *)(const void *)(cpl + 1);
694 struct tcb_histent *te;
695 const u_int tid = GET_TID(cpl);
696 bool remove;
697
698 remove = GET_TCB_FIELD(tcb, T_STATE) == TCPS_CLOSED;
699 te = lookup_tcb_histent(sc, tid, remove);
700 if (te == NULL) {
701 /* Not in the history. Who issued the GET_TCB for this? */
702 device_printf(sc->dev, "tcb %u: flags 0x%016jx, state %u, "
703 "srtt %u, sscale %u, rscale %u, cookie 0x%x\n", tid,
704 (uintmax_t)get_tcb_tflags(tcb), GET_TCB_FIELD(tcb, T_STATE),
705 GET_TCB_FIELD(tcb, T_SRTT), GET_TCB_FIELD(tcb, SND_SCALE),
706 GET_TCB_FIELD(tcb, RCV_SCALE), cpl->cookie);
707 goto done;
708 }
709
710 MPASS(te->te_flags & TE_RPL_PENDING);
711 te->te_flags &= ~TE_RPL_PENDING;
712 if (remove) {
713 remove_tcb_histent(te);
714 } else {
715 update_tcb_histent(te, tcb);
716 callout_reset(&te->te_callout, hz / 10, request_tcb, te);
717 release_tcb_histent(te);
718 }
719 done:
720 m_freem(m);
721 return (0);
722 }
723
724 static void
fill_tcp_info_from_tcb(struct adapter * sc,uint64_t * tcb,struct tcp_info * ti)725 fill_tcp_info_from_tcb(struct adapter *sc, uint64_t *tcb, struct tcp_info *ti)
726 {
727 uint32_t v;
728
729 ti->tcpi_state = GET_TCB_FIELD(tcb, T_STATE);
730
731 v = GET_TCB_FIELD(tcb, T_SRTT);
732 ti->tcpi_rtt = tcp_ticks_to_us(sc, v);
733
734 v = GET_TCB_FIELD(tcb, T_RTTVAR);
735 ti->tcpi_rttvar = tcp_ticks_to_us(sc, v);
736
737 ti->tcpi_snd_ssthresh = GET_TCB_FIELD(tcb, SND_SSTHRESH);
738 ti->tcpi_snd_cwnd = GET_TCB_FIELD(tcb, SND_CWND);
739 ti->tcpi_rcv_nxt = GET_TCB_FIELD(tcb, RCV_NXT);
740 ti->tcpi_rcv_adv = GET_TCB_FIELD(tcb, RCV_ADV);
741 ti->tcpi_dupacks = GET_TCB_FIELD(tcb, T_DUPACKS);
742
743 v = GET_TCB_FIELD(tcb, TX_MAX);
744 ti->tcpi_snd_nxt = v - GET_TCB_FIELD(tcb, SND_NXT_RAW);
745 ti->tcpi_snd_una = v - GET_TCB_FIELD(tcb, SND_UNA_RAW);
746 ti->tcpi_snd_max = v - GET_TCB_FIELD(tcb, SND_MAX_RAW);
747
748 /* Receive window being advertised by us. */
749 ti->tcpi_rcv_wscale = GET_TCB_FIELD(tcb, SND_SCALE); /* Yes, SND. */
750 ti->tcpi_rcv_space = GET_TCB_FIELD(tcb, RCV_WND);
751
752 /* Send window */
753 ti->tcpi_snd_wscale = GET_TCB_FIELD(tcb, RCV_SCALE); /* Yes, RCV. */
754 ti->tcpi_snd_wnd = GET_TCB_FIELD(tcb, RCV_ADV);
755 if (get_tcb_tflags(tcb) & V_TF_RECV_SCALE(1))
756 ti->tcpi_snd_wnd <<= ti->tcpi_snd_wscale;
757 else
758 ti->tcpi_snd_wscale = 0;
759
760 }
761
762 static void
fill_tcp_info_from_history(struct adapter * sc,struct tcb_histent * te,struct tcp_info * ti)763 fill_tcp_info_from_history(struct adapter *sc, struct tcb_histent *te,
764 struct tcp_info *ti)
765 {
766
767 fill_tcp_info_from_tcb(sc, te->te_tcb, ti);
768 }
769
770 /*
771 * Reads the TCB for the given tid using a memory window and copies it to 'buf'
772 * in the same format as CPL_GET_TCB_RPL.
773 */
774 static void
read_tcb_using_memwin(struct adapter * sc,u_int tid,uint64_t * buf)775 read_tcb_using_memwin(struct adapter *sc, u_int tid, uint64_t *buf)
776 {
777 int i, j, k, rc;
778 uint32_t addr;
779 u_char *tcb, tmp;
780
781 MPASS(tid >= sc->tids.tid_base);
782 MPASS(tid - sc->tids.tid_base < sc->tids.ntids);
783
784 addr = t4_read_reg(sc, A_TP_CMM_TCB_BASE) + tid * TCB_SIZE;
785 rc = read_via_memwin(sc, 2, addr, (uint32_t *)buf, TCB_SIZE);
786 if (rc != 0)
787 return;
788
789 tcb = (u_char *)buf;
790 for (i = 0, j = TCB_SIZE - 16; i < j; i += 16, j -= 16) {
791 for (k = 0; k < 16; k++) {
792 tmp = tcb[i + k];
793 tcb[i + k] = tcb[j + k];
794 tcb[j + k] = tmp;
795 }
796 }
797 }
798
799 static void
fill_tcp_info(struct adapter * sc,u_int tid,struct tcp_info * ti)800 fill_tcp_info(struct adapter *sc, u_int tid, struct tcp_info *ti)
801 {
802 uint64_t tcb[TCB_SIZE / sizeof(uint64_t)];
803 struct tcb_histent *te;
804
805 ti->tcpi_toe_tid = tid;
806 te = lookup_tcb_histent(sc, tid, false);
807 if (te != NULL) {
808 fill_tcp_info_from_history(sc, te, ti);
809 release_tcb_histent(te);
810 } else {
811 if (!(sc->debug_flags & DF_DISABLE_TCB_CACHE)) {
812 /* XXX: tell firmware to flush TCB cache. */
813 }
814 read_tcb_using_memwin(sc, tid, tcb);
815 fill_tcp_info_from_tcb(sc, tcb, ti);
816 }
817 }
818
819 /*
820 * Called by the kernel to allow the TOE driver to "refine" values filled up in
821 * the tcp_info for an offloaded connection.
822 */
823 static void
t4_tcp_info(struct toedev * tod,const struct tcpcb * tp,struct tcp_info * ti)824 t4_tcp_info(struct toedev *tod, const struct tcpcb *tp, struct tcp_info *ti)
825 {
826 struct adapter *sc = tod->tod_softc;
827 struct toepcb *toep = tp->t_toe;
828
829 INP_LOCK_ASSERT(tp->t_inpcb);
830 MPASS(ti != NULL);
831
832 fill_tcp_info(sc, toep->tid, ti);
833 }
834
835 #ifdef KERN_TLS
836 static int
t4_alloc_tls_session(struct toedev * tod,struct tcpcb * tp,struct ktls_session * tls,int direction)837 t4_alloc_tls_session(struct toedev *tod, struct tcpcb *tp,
838 struct ktls_session *tls, int direction)
839 {
840 struct toepcb *toep = tp->t_toe;
841
842 INP_WLOCK_ASSERT(tp->t_inpcb);
843 MPASS(tls != NULL);
844
845 return (tls_alloc_ktls(toep, tls, direction));
846 }
847 #endif
848
849 /*
850 * The TOE driver will not receive any more CPLs for the tid associated with the
851 * toepcb; release the hold on the inpcb.
852 */
853 void
final_cpl_received(struct toepcb * toep)854 final_cpl_received(struct toepcb *toep)
855 {
856 struct inpcb *inp = toep->inp;
857 bool need_wakeup;
858
859 KASSERT(inp != NULL, ("%s: inp is NULL", __func__));
860 INP_WLOCK_ASSERT(inp);
861 KASSERT(toep->flags & TPF_CPL_PENDING,
862 ("%s: CPL not pending already?", __func__));
863
864 CTR6(KTR_CXGBE, "%s: tid %d, toep %p (0x%x), inp %p (0x%x)",
865 __func__, toep->tid, toep, toep->flags, inp, inp->inp_flags);
866
867 if (ulp_mode(toep) == ULP_MODE_TCPDDP)
868 release_ddp_resources(toep);
869 else if (ulp_mode(toep) == ULP_MODE_TLS)
870 tls_detach(toep);
871 toep->inp = NULL;
872 need_wakeup = (toep->flags & TPF_WAITING_FOR_FINAL) != 0;
873 toep->flags &= ~(TPF_CPL_PENDING | TPF_WAITING_FOR_FINAL);
874 mbufq_drain(&toep->ulp_pduq);
875 mbufq_drain(&toep->ulp_pdu_reclaimq);
876
877 if (!(toep->flags & TPF_ATTACHED))
878 release_offload_resources(toep);
879
880 if (!in_pcbrele_wlocked(inp))
881 INP_WUNLOCK(inp);
882
883 if (need_wakeup) {
884 struct mtx *lock = mtx_pool_find(mtxpool_sleep, toep);
885
886 mtx_lock(lock);
887 wakeup(toep);
888 mtx_unlock(lock);
889 }
890 }
891
892 void
insert_tid(struct adapter * sc,int tid,void * ctx,int ntids)893 insert_tid(struct adapter *sc, int tid, void *ctx, int ntids)
894 {
895 struct tid_info *t = &sc->tids;
896
897 MPASS(tid >= t->tid_base);
898 MPASS(tid - t->tid_base < t->ntids);
899
900 t->tid_tab[tid - t->tid_base] = ctx;
901 atomic_add_int(&t->tids_in_use, ntids);
902 }
903
904 void *
lookup_tid(struct adapter * sc,int tid)905 lookup_tid(struct adapter *sc, int tid)
906 {
907 struct tid_info *t = &sc->tids;
908
909 return (t->tid_tab[tid - t->tid_base]);
910 }
911
912 void
update_tid(struct adapter * sc,int tid,void * ctx)913 update_tid(struct adapter *sc, int tid, void *ctx)
914 {
915 struct tid_info *t = &sc->tids;
916
917 t->tid_tab[tid - t->tid_base] = ctx;
918 }
919
920 void
remove_tid(struct adapter * sc,int tid,int ntids)921 remove_tid(struct adapter *sc, int tid, int ntids)
922 {
923 struct tid_info *t = &sc->tids;
924
925 t->tid_tab[tid - t->tid_base] = NULL;
926 atomic_subtract_int(&t->tids_in_use, ntids);
927 }
928
929 /*
930 * What mtu_idx to use, given a 4-tuple. Note that both s->mss and tcp_mssopt
931 * have the MSS that we should advertise in our SYN. Advertised MSS doesn't
932 * account for any TCP options so the effective MSS (only payload, no headers or
933 * options) could be different.
934 */
935 static int
find_best_mtu_idx(struct adapter * sc,struct in_conninfo * inc,struct offload_settings * s)936 find_best_mtu_idx(struct adapter *sc, struct in_conninfo *inc,
937 struct offload_settings *s)
938 {
939 unsigned short *mtus = &sc->params.mtus[0];
940 int i, mss, mtu;
941
942 MPASS(inc != NULL);
943
944 mss = s->mss > 0 ? s->mss : tcp_mssopt(inc);
945 if (inc->inc_flags & INC_ISIPV6)
946 mtu = mss + sizeof(struct ip6_hdr) + sizeof(struct tcphdr);
947 else
948 mtu = mss + sizeof(struct ip) + sizeof(struct tcphdr);
949
950 for (i = 0; i < NMTUS - 1 && mtus[i + 1] <= mtu; i++)
951 continue;
952
953 return (i);
954 }
955
956 /*
957 * Determine the receive window size for a socket.
958 */
959 u_long
select_rcv_wnd(struct socket * so)960 select_rcv_wnd(struct socket *so)
961 {
962 unsigned long wnd;
963
964 SOCKBUF_LOCK_ASSERT(&so->so_rcv);
965
966 wnd = sbspace(&so->so_rcv);
967 if (wnd < MIN_RCV_WND)
968 wnd = MIN_RCV_WND;
969
970 return min(wnd, MAX_RCV_WND);
971 }
972
973 int
select_rcv_wscale(void)974 select_rcv_wscale(void)
975 {
976 int wscale = 0;
977 unsigned long space = sb_max;
978
979 if (space > MAX_RCV_WND)
980 space = MAX_RCV_WND;
981
982 while (wscale < TCP_MAX_WINSHIFT && (TCP_MAXWIN << wscale) < space)
983 wscale++;
984
985 return (wscale);
986 }
987
988 __be64
calc_options0(struct vi_info * vi,struct conn_params * cp)989 calc_options0(struct vi_info *vi, struct conn_params *cp)
990 {
991 uint64_t opt0 = 0;
992
993 opt0 |= F_TCAM_BYPASS;
994
995 MPASS(cp->wscale >= 0 && cp->wscale <= M_WND_SCALE);
996 opt0 |= V_WND_SCALE(cp->wscale);
997
998 MPASS(cp->mtu_idx >= 0 && cp->mtu_idx < NMTUS);
999 opt0 |= V_MSS_IDX(cp->mtu_idx);
1000
1001 MPASS(cp->ulp_mode >= 0 && cp->ulp_mode <= M_ULP_MODE);
1002 opt0 |= V_ULP_MODE(cp->ulp_mode);
1003
1004 MPASS(cp->opt0_bufsize >= 0 && cp->opt0_bufsize <= M_RCV_BUFSIZ);
1005 opt0 |= V_RCV_BUFSIZ(cp->opt0_bufsize);
1006
1007 MPASS(cp->l2t_idx >= 0 && cp->l2t_idx < vi->adapter->vres.l2t.size);
1008 opt0 |= V_L2T_IDX(cp->l2t_idx);
1009
1010 opt0 |= V_SMAC_SEL(vi->smt_idx);
1011 opt0 |= V_TX_CHAN(vi->pi->tx_chan);
1012
1013 MPASS(cp->keepalive == 0 || cp->keepalive == 1);
1014 opt0 |= V_KEEP_ALIVE(cp->keepalive);
1015
1016 MPASS(cp->nagle == 0 || cp->nagle == 1);
1017 opt0 |= V_NAGLE(cp->nagle);
1018
1019 return (htobe64(opt0));
1020 }
1021
1022 __be32
calc_options2(struct vi_info * vi,struct conn_params * cp)1023 calc_options2(struct vi_info *vi, struct conn_params *cp)
1024 {
1025 uint32_t opt2 = 0;
1026 struct port_info *pi = vi->pi;
1027 struct adapter *sc = pi->adapter;
1028
1029 /*
1030 * rx flow control, rx coalesce, congestion control, and tx pace are all
1031 * explicitly set by the driver. On T5+ the ISS is also set by the
1032 * driver to the value picked by the kernel.
1033 */
1034 if (is_t4(sc)) {
1035 opt2 |= F_RX_FC_VALID | F_RX_COALESCE_VALID;
1036 opt2 |= F_CONG_CNTRL_VALID | F_PACE_VALID;
1037 } else {
1038 opt2 |= F_T5_OPT_2_VALID; /* all 4 valid */
1039 opt2 |= F_T5_ISS; /* ISS provided in CPL */
1040 }
1041
1042 MPASS(cp->sack == 0 || cp->sack == 1);
1043 opt2 |= V_SACK_EN(cp->sack);
1044
1045 MPASS(cp->tstamp == 0 || cp->tstamp == 1);
1046 opt2 |= V_TSTAMPS_EN(cp->tstamp);
1047
1048 if (cp->wscale > 0)
1049 opt2 |= F_WND_SCALE_EN;
1050
1051 MPASS(cp->ecn == 0 || cp->ecn == 1);
1052 opt2 |= V_CCTRL_ECN(cp->ecn);
1053
1054 opt2 |= V_TX_QUEUE(TX_MODQ(pi->tx_chan));
1055 opt2 |= V_PACE(0);
1056 opt2 |= F_RSS_QUEUE_VALID;
1057 opt2 |= V_RSS_QUEUE(sc->sge.ofld_rxq[cp->rxq_idx].iq.abs_id);
1058 if (chip_id(sc) <= CHELSIO_T6) {
1059 MPASS(pi->rx_chan == 0 || pi->rx_chan == 1);
1060 opt2 |= V_RX_CHANNEL(pi->rx_chan);
1061 }
1062
1063 MPASS(cp->cong_algo >= 0 && cp->cong_algo <= M_CONG_CNTRL);
1064 opt2 |= V_CONG_CNTRL(cp->cong_algo);
1065
1066 MPASS(cp->rx_coalesce == 0 || cp->rx_coalesce == 1);
1067 if (cp->rx_coalesce == 1)
1068 opt2 |= V_RX_COALESCE(M_RX_COALESCE);
1069
1070 opt2 |= V_RX_FC_DDP(0) | V_RX_FC_DISABLE(0);
1071 #ifdef USE_DDP_RX_FLOW_CONTROL
1072 if (cp->ulp_mode == ULP_MODE_TCPDDP)
1073 opt2 |= F_RX_FC_DDP;
1074 #endif
1075
1076 return (htobe32(opt2));
1077 }
1078
1079 uint64_t
select_ntuple(struct vi_info * vi,struct l2t_entry * e)1080 select_ntuple(struct vi_info *vi, struct l2t_entry *e)
1081 {
1082 struct adapter *sc = vi->adapter;
1083 struct tp_params *tp = &sc->params.tp;
1084 uint64_t ntuple = 0;
1085
1086 /*
1087 * Initialize each of the fields which we care about which are present
1088 * in the Compressed Filter Tuple.
1089 */
1090 if (tp->vlan_shift >= 0 && EVL_VLANOFTAG(e->vlan) != CPL_L2T_VLAN_NONE)
1091 ntuple |= (uint64_t)(F_FT_VLAN_VLD | e->vlan) << tp->vlan_shift;
1092
1093 if (tp->port_shift >= 0)
1094 ntuple |= (uint64_t)e->lport << tp->port_shift;
1095
1096 if (tp->protocol_shift >= 0)
1097 ntuple |= (uint64_t)IPPROTO_TCP << tp->protocol_shift;
1098
1099 if (tp->vnic_shift >= 0 && tp->vnic_mode == FW_VNIC_MODE_PF_VF) {
1100 ntuple |= (uint64_t)(V_FT_VNID_ID_VF(vi->vin) |
1101 V_FT_VNID_ID_PF(sc->pf) | V_FT_VNID_ID_VLD(vi->vfvld)) <<
1102 tp->vnic_shift;
1103 }
1104
1105 if (is_t4(sc))
1106 return (htobe32((uint32_t)ntuple));
1107 else
1108 return (htobe64(V_FILTER_TUPLE(ntuple)));
1109 }
1110
1111 static int
is_tls_sock(struct socket * so,struct adapter * sc)1112 is_tls_sock(struct socket *so, struct adapter *sc)
1113 {
1114 struct inpcb *inp = sotoinpcb(so);
1115 int i, rc;
1116
1117 /* XXX: Eventually add a SO_WANT_TLS socket option perhaps? */
1118 rc = 0;
1119 ADAPTER_LOCK(sc);
1120 for (i = 0; i < sc->tt.num_tls_rx_ports; i++) {
1121 if (inp->inp_lport == htons(sc->tt.tls_rx_ports[i]) ||
1122 inp->inp_fport == htons(sc->tt.tls_rx_ports[i])) {
1123 rc = 1;
1124 break;
1125 }
1126 }
1127 ADAPTER_UNLOCK(sc);
1128 return (rc);
1129 }
1130
1131 /*
1132 * Initialize various connection parameters.
1133 */
1134 void
init_conn_params(struct vi_info * vi,struct offload_settings * s,struct in_conninfo * inc,struct socket * so,const struct tcp_options * tcpopt,int16_t l2t_idx,struct conn_params * cp)1135 init_conn_params(struct vi_info *vi , struct offload_settings *s,
1136 struct in_conninfo *inc, struct socket *so,
1137 const struct tcp_options *tcpopt, int16_t l2t_idx, struct conn_params *cp)
1138 {
1139 struct port_info *pi = vi->pi;
1140 struct adapter *sc = pi->adapter;
1141 struct tom_tunables *tt = &sc->tt;
1142 struct inpcb *inp = sotoinpcb(so);
1143 struct tcpcb *tp = intotcpcb(inp);
1144 u_long wnd;
1145 u_int q_idx;
1146
1147 MPASS(s->offload != 0);
1148
1149 /* Congestion control algorithm */
1150 if (s->cong_algo >= 0)
1151 cp->cong_algo = s->cong_algo & M_CONG_CNTRL;
1152 else if (sc->tt.cong_algorithm >= 0)
1153 cp->cong_algo = tt->cong_algorithm & M_CONG_CNTRL;
1154 else {
1155 struct cc_algo *cc = CC_ALGO(tp);
1156
1157 if (strcasecmp(cc->name, "reno") == 0)
1158 cp->cong_algo = CONG_ALG_RENO;
1159 else if (strcasecmp(cc->name, "tahoe") == 0)
1160 cp->cong_algo = CONG_ALG_TAHOE;
1161 if (strcasecmp(cc->name, "newreno") == 0)
1162 cp->cong_algo = CONG_ALG_NEWRENO;
1163 if (strcasecmp(cc->name, "highspeed") == 0)
1164 cp->cong_algo = CONG_ALG_HIGHSPEED;
1165 else {
1166 /*
1167 * Use newreno in case the algorithm selected by the
1168 * host stack is not supported by the hardware.
1169 */
1170 cp->cong_algo = CONG_ALG_NEWRENO;
1171 }
1172 }
1173
1174 /* Tx traffic scheduling class. */
1175 if (s->sched_class >= 0 && s->sched_class < sc->params.nsched_cls)
1176 cp->tc_idx = s->sched_class;
1177 else
1178 cp->tc_idx = -1;
1179
1180 /* Nagle's algorithm. */
1181 if (s->nagle >= 0)
1182 cp->nagle = s->nagle > 0 ? 1 : 0;
1183 else
1184 cp->nagle = tp->t_flags & TF_NODELAY ? 0 : 1;
1185
1186 /* TCP Keepalive. */
1187 if (V_tcp_always_keepalive || so_options_get(so) & SO_KEEPALIVE)
1188 cp->keepalive = 1;
1189 else
1190 cp->keepalive = 0;
1191
1192 /* Optimization that's specific to T5 @ 40G. */
1193 if (tt->tx_align >= 0)
1194 cp->tx_align = tt->tx_align > 0 ? 1 : 0;
1195 else if (chip_id(sc) == CHELSIO_T5 &&
1196 (port_top_speed(pi) > 10 || sc->params.nports > 2))
1197 cp->tx_align = 1;
1198 else
1199 cp->tx_align = 0;
1200
1201 /* ULP mode. */
1202 if (can_tls_offload(sc) &&
1203 (s->tls > 0 || (s->tls < 0 && is_tls_sock(so, sc))))
1204 cp->ulp_mode = ULP_MODE_TLS;
1205 else if (s->ddp > 0 ||
1206 (s->ddp < 0 && sc->tt.ddp && (so_options_get(so) & SO_NO_DDP) == 0))
1207 cp->ulp_mode = ULP_MODE_TCPDDP;
1208 else
1209 cp->ulp_mode = ULP_MODE_NONE;
1210
1211 /* Rx coalescing. */
1212 if (s->rx_coalesce >= 0)
1213 cp->rx_coalesce = s->rx_coalesce > 0 ? 1 : 0;
1214 else if (cp->ulp_mode == ULP_MODE_TLS)
1215 cp->rx_coalesce = 0;
1216 else if (tt->rx_coalesce >= 0)
1217 cp->rx_coalesce = tt->rx_coalesce > 0 ? 1 : 0;
1218 else
1219 cp->rx_coalesce = 1; /* default */
1220
1221 /*
1222 * Index in the PMTU table. This controls the MSS that we announce in
1223 * our SYN initially, but after ESTABLISHED it controls the MSS that we
1224 * use to send data.
1225 */
1226 cp->mtu_idx = find_best_mtu_idx(sc, inc, s);
1227
1228 /* Tx queue for this connection. */
1229 if (s->txq == QUEUE_RANDOM)
1230 q_idx = arc4random();
1231 else if (s->txq == QUEUE_ROUNDROBIN)
1232 q_idx = atomic_fetchadd_int(&vi->txq_rr, 1);
1233 else
1234 q_idx = s->txq;
1235 cp->txq_idx = vi->first_ofld_txq + q_idx % vi->nofldtxq;
1236
1237 /* Rx queue for this connection. */
1238 if (s->rxq == QUEUE_RANDOM)
1239 q_idx = arc4random();
1240 else if (s->rxq == QUEUE_ROUNDROBIN)
1241 q_idx = atomic_fetchadd_int(&vi->rxq_rr, 1);
1242 else
1243 q_idx = s->rxq;
1244 cp->rxq_idx = vi->first_ofld_rxq + q_idx % vi->nofldrxq;
1245
1246 if (SOLISTENING(so)) {
1247 /* Passive open */
1248 MPASS(tcpopt != NULL);
1249
1250 /* TCP timestamp option */
1251 if (tcpopt->tstamp &&
1252 (s->tstamp > 0 || (s->tstamp < 0 && V_tcp_do_rfc1323)))
1253 cp->tstamp = 1;
1254 else
1255 cp->tstamp = 0;
1256
1257 /* SACK */
1258 if (tcpopt->sack &&
1259 (s->sack > 0 || (s->sack < 0 && V_tcp_do_sack)))
1260 cp->sack = 1;
1261 else
1262 cp->sack = 0;
1263
1264 /* Receive window scaling. */
1265 if (tcpopt->wsf > 0 && tcpopt->wsf < 15 && V_tcp_do_rfc1323)
1266 cp->wscale = select_rcv_wscale();
1267 else
1268 cp->wscale = 0;
1269
1270 /* ECN */
1271 if (tcpopt->ecn && /* XXX: review. */
1272 (s->ecn > 0 || (s->ecn < 0 && V_tcp_do_ecn)))
1273 cp->ecn = 1;
1274 else
1275 cp->ecn = 0;
1276
1277 wnd = max(so->sol_sbrcv_hiwat, MIN_RCV_WND);
1278 cp->opt0_bufsize = min(wnd >> 10, M_RCV_BUFSIZ);
1279
1280 if (tt->sndbuf > 0)
1281 cp->sndbuf = tt->sndbuf;
1282 else if (so->sol_sbsnd_flags & SB_AUTOSIZE &&
1283 V_tcp_do_autosndbuf)
1284 cp->sndbuf = 256 * 1024;
1285 else
1286 cp->sndbuf = so->sol_sbsnd_hiwat;
1287 } else {
1288 /* Active open */
1289
1290 /* TCP timestamp option */
1291 if (s->tstamp > 0 ||
1292 (s->tstamp < 0 && (tp->t_flags & TF_REQ_TSTMP)))
1293 cp->tstamp = 1;
1294 else
1295 cp->tstamp = 0;
1296
1297 /* SACK */
1298 if (s->sack > 0 ||
1299 (s->sack < 0 && (tp->t_flags & TF_SACK_PERMIT)))
1300 cp->sack = 1;
1301 else
1302 cp->sack = 0;
1303
1304 /* Receive window scaling */
1305 if (tp->t_flags & TF_REQ_SCALE)
1306 cp->wscale = select_rcv_wscale();
1307 else
1308 cp->wscale = 0;
1309
1310 /* ECN */
1311 if (s->ecn > 0 || (s->ecn < 0 && V_tcp_do_ecn == 1))
1312 cp->ecn = 1;
1313 else
1314 cp->ecn = 0;
1315
1316 SOCKBUF_LOCK(&so->so_rcv);
1317 wnd = max(select_rcv_wnd(so), MIN_RCV_WND);
1318 SOCKBUF_UNLOCK(&so->so_rcv);
1319 cp->opt0_bufsize = min(wnd >> 10, M_RCV_BUFSIZ);
1320
1321 if (tt->sndbuf > 0)
1322 cp->sndbuf = tt->sndbuf;
1323 else {
1324 SOCKBUF_LOCK(&so->so_snd);
1325 if (so->so_snd.sb_flags & SB_AUTOSIZE &&
1326 V_tcp_do_autosndbuf)
1327 cp->sndbuf = 256 * 1024;
1328 else
1329 cp->sndbuf = so->so_snd.sb_hiwat;
1330 SOCKBUF_UNLOCK(&so->so_snd);
1331 }
1332 }
1333
1334 cp->l2t_idx = l2t_idx;
1335
1336 /* This will be initialized on ESTABLISHED. */
1337 cp->emss = 0;
1338 }
1339
1340 int
negative_advice(int status)1341 negative_advice(int status)
1342 {
1343
1344 return (status == CPL_ERR_RTX_NEG_ADVICE ||
1345 status == CPL_ERR_PERSIST_NEG_ADVICE ||
1346 status == CPL_ERR_KEEPALV_NEG_ADVICE);
1347 }
1348
1349 static int
alloc_tid_tab(struct tid_info * t,int flags)1350 alloc_tid_tab(struct tid_info *t, int flags)
1351 {
1352
1353 MPASS(t->ntids > 0);
1354 MPASS(t->tid_tab == NULL);
1355
1356 t->tid_tab = malloc(t->ntids * sizeof(*t->tid_tab), M_CXGBE,
1357 M_ZERO | flags);
1358 if (t->tid_tab == NULL)
1359 return (ENOMEM);
1360 atomic_store_rel_int(&t->tids_in_use, 0);
1361
1362 return (0);
1363 }
1364
1365 static void
free_tid_tab(struct tid_info * t)1366 free_tid_tab(struct tid_info *t)
1367 {
1368
1369 KASSERT(t->tids_in_use == 0,
1370 ("%s: %d tids still in use.", __func__, t->tids_in_use));
1371
1372 free(t->tid_tab, M_CXGBE);
1373 t->tid_tab = NULL;
1374 }
1375
1376 static int
alloc_stid_tab(struct tid_info * t,int flags)1377 alloc_stid_tab(struct tid_info *t, int flags)
1378 {
1379
1380 MPASS(t->nstids > 0);
1381 MPASS(t->stid_tab == NULL);
1382
1383 t->stid_tab = malloc(t->nstids * sizeof(*t->stid_tab), M_CXGBE,
1384 M_ZERO | flags);
1385 if (t->stid_tab == NULL)
1386 return (ENOMEM);
1387 mtx_init(&t->stid_lock, "stid lock", NULL, MTX_DEF);
1388 t->stids_in_use = 0;
1389 TAILQ_INIT(&t->stids);
1390 t->nstids_free_head = t->nstids;
1391
1392 return (0);
1393 }
1394
1395 static void
free_stid_tab(struct tid_info * t)1396 free_stid_tab(struct tid_info *t)
1397 {
1398
1399 KASSERT(t->stids_in_use == 0,
1400 ("%s: %d tids still in use.", __func__, t->stids_in_use));
1401
1402 if (mtx_initialized(&t->stid_lock))
1403 mtx_destroy(&t->stid_lock);
1404 free(t->stid_tab, M_CXGBE);
1405 t->stid_tab = NULL;
1406 }
1407
1408 static void
free_tid_tabs(struct tid_info * t)1409 free_tid_tabs(struct tid_info *t)
1410 {
1411
1412 free_tid_tab(t);
1413 free_stid_tab(t);
1414 }
1415
1416 static int
alloc_tid_tabs(struct tid_info * t)1417 alloc_tid_tabs(struct tid_info *t)
1418 {
1419 int rc;
1420
1421 rc = alloc_tid_tab(t, M_NOWAIT);
1422 if (rc != 0)
1423 goto failed;
1424
1425 rc = alloc_stid_tab(t, M_NOWAIT);
1426 if (rc != 0)
1427 goto failed;
1428
1429 return (0);
1430 failed:
1431 free_tid_tabs(t);
1432 return (rc);
1433 }
1434
1435 static inline void
alloc_tcb_history(struct adapter * sc,struct tom_data * td)1436 alloc_tcb_history(struct adapter *sc, struct tom_data *td)
1437 {
1438
1439 if (sc->tids.ntids == 0 || sc->tids.ntids > 1024)
1440 return;
1441 rw_init(&td->tcb_history_lock, "TCB history");
1442 td->tcb_history = malloc(sc->tids.ntids * sizeof(*td->tcb_history),
1443 M_CXGBE, M_ZERO | M_NOWAIT);
1444 td->dupack_threshold = G_DUPACKTHRESH(t4_read_reg(sc, A_TP_PARA_REG0));
1445 }
1446
1447 static inline void
free_tcb_history(struct adapter * sc,struct tom_data * td)1448 free_tcb_history(struct adapter *sc, struct tom_data *td)
1449 {
1450 #ifdef INVARIANTS
1451 int i;
1452
1453 if (td->tcb_history != NULL) {
1454 for (i = 0; i < sc->tids.ntids; i++) {
1455 MPASS(td->tcb_history[i] == NULL);
1456 }
1457 }
1458 #endif
1459 free(td->tcb_history, M_CXGBE);
1460 if (rw_initialized(&td->tcb_history_lock))
1461 rw_destroy(&td->tcb_history_lock);
1462 }
1463
1464 static void
free_tom_data(struct adapter * sc,struct tom_data * td)1465 free_tom_data(struct adapter *sc, struct tom_data *td)
1466 {
1467
1468 ASSERT_SYNCHRONIZED_OP(sc);
1469
1470 KASSERT(TAILQ_EMPTY(&td->toep_list),
1471 ("%s: TOE PCB list is not empty.", __func__));
1472 KASSERT(td->lctx_count == 0,
1473 ("%s: lctx hash table is not empty.", __func__));
1474
1475 t4_free_ppod_region(&td->pr);
1476
1477 if (td->listen_mask != 0)
1478 hashdestroy(td->listen_hash, M_CXGBE, td->listen_mask);
1479
1480 if (mtx_initialized(&td->unsent_wr_lock))
1481 mtx_destroy(&td->unsent_wr_lock);
1482 if (mtx_initialized(&td->lctx_hash_lock))
1483 mtx_destroy(&td->lctx_hash_lock);
1484 if (mtx_initialized(&td->toep_list_lock))
1485 mtx_destroy(&td->toep_list_lock);
1486
1487 free_tcb_history(sc, td);
1488 free_tid_tabs(&sc->tids);
1489 free(td, M_CXGBE);
1490 }
1491
1492 static char *
prepare_pkt(int open_type,uint16_t vtag,struct inpcb * inp,int * pktlen,int * buflen)1493 prepare_pkt(int open_type, uint16_t vtag, struct inpcb *inp, int *pktlen,
1494 int *buflen)
1495 {
1496 char *pkt;
1497 struct tcphdr *th;
1498 int ipv6, len;
1499 const int maxlen =
1500 max(sizeof(struct ether_header), sizeof(struct ether_vlan_header)) +
1501 max(sizeof(struct ip), sizeof(struct ip6_hdr)) +
1502 sizeof(struct tcphdr);
1503
1504 MPASS(open_type == OPEN_TYPE_ACTIVE || open_type == OPEN_TYPE_LISTEN);
1505
1506 pkt = malloc(maxlen, M_CXGBE, M_ZERO | M_NOWAIT);
1507 if (pkt == NULL)
1508 return (NULL);
1509
1510 ipv6 = inp->inp_vflag & INP_IPV6;
1511 len = 0;
1512
1513 if (EVL_VLANOFTAG(vtag) == 0xfff) {
1514 struct ether_header *eh = (void *)pkt;
1515
1516 if (ipv6)
1517 eh->ether_type = htons(ETHERTYPE_IPV6);
1518 else
1519 eh->ether_type = htons(ETHERTYPE_IP);
1520
1521 len += sizeof(*eh);
1522 } else {
1523 struct ether_vlan_header *evh = (void *)pkt;
1524
1525 evh->evl_encap_proto = htons(ETHERTYPE_VLAN);
1526 evh->evl_tag = htons(vtag);
1527 if (ipv6)
1528 evh->evl_proto = htons(ETHERTYPE_IPV6);
1529 else
1530 evh->evl_proto = htons(ETHERTYPE_IP);
1531
1532 len += sizeof(*evh);
1533 }
1534
1535 if (ipv6) {
1536 struct ip6_hdr *ip6 = (void *)&pkt[len];
1537
1538 ip6->ip6_vfc = IPV6_VERSION;
1539 ip6->ip6_plen = htons(sizeof(struct tcphdr));
1540 ip6->ip6_nxt = IPPROTO_TCP;
1541 if (open_type == OPEN_TYPE_ACTIVE) {
1542 ip6->ip6_src = inp->in6p_laddr;
1543 ip6->ip6_dst = inp->in6p_faddr;
1544 } else if (open_type == OPEN_TYPE_LISTEN) {
1545 ip6->ip6_src = inp->in6p_laddr;
1546 ip6->ip6_dst = ip6->ip6_src;
1547 }
1548
1549 len += sizeof(*ip6);
1550 } else {
1551 struct ip *ip = (void *)&pkt[len];
1552
1553 ip->ip_v = IPVERSION;
1554 ip->ip_hl = sizeof(*ip) >> 2;
1555 ip->ip_tos = inp->inp_ip_tos;
1556 ip->ip_len = htons(sizeof(struct ip) + sizeof(struct tcphdr));
1557 ip->ip_ttl = inp->inp_ip_ttl;
1558 ip->ip_p = IPPROTO_TCP;
1559 if (open_type == OPEN_TYPE_ACTIVE) {
1560 ip->ip_src = inp->inp_laddr;
1561 ip->ip_dst = inp->inp_faddr;
1562 } else if (open_type == OPEN_TYPE_LISTEN) {
1563 ip->ip_src = inp->inp_laddr;
1564 ip->ip_dst = ip->ip_src;
1565 }
1566
1567 len += sizeof(*ip);
1568 }
1569
1570 th = (void *)&pkt[len];
1571 if (open_type == OPEN_TYPE_ACTIVE) {
1572 th->th_sport = inp->inp_lport; /* network byte order already */
1573 th->th_dport = inp->inp_fport; /* ditto */
1574 } else if (open_type == OPEN_TYPE_LISTEN) {
1575 th->th_sport = inp->inp_lport; /* network byte order already */
1576 th->th_dport = th->th_sport;
1577 }
1578 len += sizeof(th);
1579
1580 *pktlen = *buflen = len;
1581 return (pkt);
1582 }
1583
1584 const struct offload_settings *
lookup_offload_policy(struct adapter * sc,int open_type,struct mbuf * m,uint16_t vtag,struct inpcb * inp)1585 lookup_offload_policy(struct adapter *sc, int open_type, struct mbuf *m,
1586 uint16_t vtag, struct inpcb *inp)
1587 {
1588 const struct t4_offload_policy *op;
1589 char *pkt;
1590 struct offload_rule *r;
1591 int i, matched, pktlen, buflen;
1592 static const struct offload_settings allow_offloading_settings = {
1593 .offload = 1,
1594 .rx_coalesce = -1,
1595 .cong_algo = -1,
1596 .sched_class = -1,
1597 .tstamp = -1,
1598 .sack = -1,
1599 .nagle = -1,
1600 .ecn = -1,
1601 .ddp = -1,
1602 .tls = -1,
1603 .txq = QUEUE_RANDOM,
1604 .rxq = QUEUE_RANDOM,
1605 .mss = -1,
1606 };
1607 static const struct offload_settings disallow_offloading_settings = {
1608 .offload = 0,
1609 /* rest is irrelevant when offload is off. */
1610 };
1611
1612 rw_assert(&sc->policy_lock, RA_LOCKED);
1613
1614 /*
1615 * If there's no Connection Offloading Policy attached to the device
1616 * then we need to return a default static policy. If
1617 * "cop_managed_offloading" is true, then we need to disallow
1618 * offloading until a COP is attached to the device. Otherwise we
1619 * allow offloading ...
1620 */
1621 op = sc->policy;
1622 if (op == NULL) {
1623 if (sc->tt.cop_managed_offloading)
1624 return (&disallow_offloading_settings);
1625 else
1626 return (&allow_offloading_settings);
1627 }
1628
1629 switch (open_type) {
1630 case OPEN_TYPE_ACTIVE:
1631 case OPEN_TYPE_LISTEN:
1632 pkt = prepare_pkt(open_type, vtag, inp, &pktlen, &buflen);
1633 break;
1634 case OPEN_TYPE_PASSIVE:
1635 MPASS(m != NULL);
1636 pkt = mtod(m, char *);
1637 MPASS(*pkt == CPL_PASS_ACCEPT_REQ);
1638 pkt += sizeof(struct cpl_pass_accept_req);
1639 pktlen = m->m_pkthdr.len - sizeof(struct cpl_pass_accept_req);
1640 buflen = m->m_len - sizeof(struct cpl_pass_accept_req);
1641 break;
1642 default:
1643 MPASS(0);
1644 return (&disallow_offloading_settings);
1645 }
1646
1647 if (pkt == NULL || pktlen == 0 || buflen == 0)
1648 return (&disallow_offloading_settings);
1649
1650 matched = 0;
1651 r = &op->rule[0];
1652 for (i = 0; i < op->nrules; i++, r++) {
1653 if (r->open_type != open_type &&
1654 r->open_type != OPEN_TYPE_DONTCARE) {
1655 continue;
1656 }
1657 matched = bpf_filter(r->bpf_prog.bf_insns, pkt, pktlen, buflen);
1658 if (matched)
1659 break;
1660 }
1661
1662 if (open_type == OPEN_TYPE_ACTIVE || open_type == OPEN_TYPE_LISTEN)
1663 free(pkt, M_CXGBE);
1664
1665 return (matched ? &r->settings : &disallow_offloading_settings);
1666 }
1667
1668 static void
reclaim_wr_resources(void * arg,int count)1669 reclaim_wr_resources(void *arg, int count)
1670 {
1671 struct tom_data *td = arg;
1672 STAILQ_HEAD(, wrqe) twr_list = STAILQ_HEAD_INITIALIZER(twr_list);
1673 struct cpl_act_open_req *cpl;
1674 u_int opcode, atid, tid;
1675 struct wrqe *wr;
1676 struct adapter *sc = td_adapter(td);
1677
1678 mtx_lock(&td->unsent_wr_lock);
1679 STAILQ_SWAP(&td->unsent_wr_list, &twr_list, wrqe);
1680 mtx_unlock(&td->unsent_wr_lock);
1681
1682 while ((wr = STAILQ_FIRST(&twr_list)) != NULL) {
1683 STAILQ_REMOVE_HEAD(&twr_list, link);
1684
1685 cpl = wrtod(wr);
1686 opcode = GET_OPCODE(cpl);
1687
1688 switch (opcode) {
1689 case CPL_ACT_OPEN_REQ:
1690 case CPL_ACT_OPEN_REQ6:
1691 atid = G_TID_TID(be32toh(OPCODE_TID(cpl)));
1692 CTR2(KTR_CXGBE, "%s: atid %u ", __func__, atid);
1693 act_open_failure_cleanup(sc, atid, EHOSTUNREACH);
1694 free(wr, M_CXGBE);
1695 break;
1696 case CPL_PASS_ACCEPT_RPL:
1697 tid = GET_TID(cpl);
1698 CTR2(KTR_CXGBE, "%s: tid %u ", __func__, tid);
1699 synack_failure_cleanup(sc, tid);
1700 free(wr, M_CXGBE);
1701 break;
1702 default:
1703 log(LOG_ERR, "%s: leaked work request %p, wr_len %d, "
1704 "opcode %x\n", __func__, wr, wr->wr_len, opcode);
1705 /* WR not freed here; go look at it with a debugger. */
1706 }
1707 }
1708 }
1709
1710 /*
1711 * Ground control to Major TOM
1712 * Commencing countdown, engines on
1713 */
1714 static int
t4_tom_activate(struct adapter * sc)1715 t4_tom_activate(struct adapter *sc)
1716 {
1717 struct tom_data *td;
1718 struct toedev *tod;
1719 struct vi_info *vi;
1720 int i, rc, v;
1721
1722 ASSERT_SYNCHRONIZED_OP(sc);
1723
1724 /* per-adapter softc for TOM */
1725 td = malloc(sizeof(*td), M_CXGBE, M_ZERO | M_NOWAIT);
1726 if (td == NULL)
1727 return (ENOMEM);
1728
1729 /* List of TOE PCBs and associated lock */
1730 mtx_init(&td->toep_list_lock, "PCB list lock", NULL, MTX_DEF);
1731 TAILQ_INIT(&td->toep_list);
1732
1733 /* Listen context */
1734 mtx_init(&td->lctx_hash_lock, "lctx hash lock", NULL, MTX_DEF);
1735 td->listen_hash = hashinit_flags(LISTEN_HASH_SIZE, M_CXGBE,
1736 &td->listen_mask, HASH_NOWAIT);
1737
1738 /* List of WRs for which L2 resolution failed */
1739 mtx_init(&td->unsent_wr_lock, "Unsent WR list lock", NULL, MTX_DEF);
1740 STAILQ_INIT(&td->unsent_wr_list);
1741 TASK_INIT(&td->reclaim_wr_resources, 0, reclaim_wr_resources, td);
1742
1743 /* TID tables */
1744 rc = alloc_tid_tabs(&sc->tids);
1745 if (rc != 0)
1746 goto done;
1747
1748 rc = t4_init_ppod_region(&td->pr, &sc->vres.ddp,
1749 t4_read_reg(sc, A_ULP_RX_TDDP_PSZ), "TDDP page pods");
1750 if (rc != 0)
1751 goto done;
1752 t4_set_reg_field(sc, A_ULP_RX_TDDP_TAGMASK,
1753 V_TDDPTAGMASK(M_TDDPTAGMASK), td->pr.pr_tag_mask);
1754
1755 alloc_tcb_history(sc, td);
1756
1757 /* toedev ops */
1758 tod = &td->tod;
1759 init_toedev(tod);
1760 tod->tod_softc = sc;
1761 tod->tod_connect = t4_connect;
1762 tod->tod_listen_start = t4_listen_start;
1763 tod->tod_listen_stop = t4_listen_stop;
1764 tod->tod_rcvd = t4_rcvd;
1765 tod->tod_output = t4_tod_output;
1766 tod->tod_send_rst = t4_send_rst;
1767 tod->tod_send_fin = t4_send_fin;
1768 tod->tod_pcb_detach = t4_pcb_detach;
1769 tod->tod_l2_update = t4_l2_update;
1770 tod->tod_syncache_added = t4_syncache_added;
1771 tod->tod_syncache_removed = t4_syncache_removed;
1772 tod->tod_syncache_respond = t4_syncache_respond;
1773 tod->tod_offload_socket = t4_offload_socket;
1774 tod->tod_ctloutput = t4_ctloutput;
1775 tod->tod_tcp_info = t4_tcp_info;
1776 #ifdef KERN_TLS
1777 tod->tod_alloc_tls_session = t4_alloc_tls_session;
1778 #endif
1779
1780 for_each_port(sc, i) {
1781 for_each_vi(sc->port[i], v, vi) {
1782 TOEDEV(vi->ifp) = &td->tod;
1783 }
1784 }
1785
1786 sc->tom_softc = td;
1787 register_toedev(sc->tom_softc);
1788
1789 done:
1790 if (rc != 0)
1791 free_tom_data(sc, td);
1792 return (rc);
1793 }
1794
1795 static int
t4_tom_deactivate(struct adapter * sc)1796 t4_tom_deactivate(struct adapter *sc)
1797 {
1798 int rc = 0;
1799 struct tom_data *td = sc->tom_softc;
1800
1801 ASSERT_SYNCHRONIZED_OP(sc);
1802
1803 if (td == NULL)
1804 return (0); /* XXX. KASSERT? */
1805
1806 if (sc->offload_map != 0)
1807 return (EBUSY); /* at least one port has IFCAP_TOE enabled */
1808
1809 if (uld_active(sc, ULD_IWARP) || uld_active(sc, ULD_ISCSI))
1810 return (EBUSY); /* both iWARP and iSCSI rely on the TOE. */
1811
1812 mtx_lock(&td->toep_list_lock);
1813 if (!TAILQ_EMPTY(&td->toep_list))
1814 rc = EBUSY;
1815 mtx_unlock(&td->toep_list_lock);
1816
1817 mtx_lock(&td->lctx_hash_lock);
1818 if (td->lctx_count > 0)
1819 rc = EBUSY;
1820 mtx_unlock(&td->lctx_hash_lock);
1821
1822 taskqueue_drain(taskqueue_thread, &td->reclaim_wr_resources);
1823 mtx_lock(&td->unsent_wr_lock);
1824 if (!STAILQ_EMPTY(&td->unsent_wr_list))
1825 rc = EBUSY;
1826 mtx_unlock(&td->unsent_wr_lock);
1827
1828 if (rc == 0) {
1829 unregister_toedev(sc->tom_softc);
1830 free_tom_data(sc, td);
1831 sc->tom_softc = NULL;
1832 }
1833
1834 return (rc);
1835 }
1836
1837 static int
t4_aio_queue_tom(struct socket * so,struct kaiocb * job)1838 t4_aio_queue_tom(struct socket *so, struct kaiocb *job)
1839 {
1840 struct tcpcb *tp = so_sototcpcb(so);
1841 struct toepcb *toep = tp->t_toe;
1842 int error;
1843
1844 if (ulp_mode(toep) == ULP_MODE_TCPDDP) {
1845 error = t4_aio_queue_ddp(so, job);
1846 if (error != EOPNOTSUPP)
1847 return (error);
1848 }
1849
1850 return (t4_aio_queue_aiotx(so, job));
1851 }
1852
1853 static int
t4_tom_mod_load(void)1854 t4_tom_mod_load(void)
1855 {
1856 /* CPL handlers */
1857 t4_register_cpl_handler(CPL_GET_TCB_RPL, do_get_tcb_rpl);
1858 t4_register_shared_cpl_handler(CPL_L2T_WRITE_RPL, do_l2t_write_rpl2,
1859 CPL_COOKIE_TOM);
1860 t4_init_connect_cpl_handlers();
1861 t4_init_listen_cpl_handlers();
1862 t4_init_cpl_io_handlers();
1863
1864 t4_ddp_mod_load();
1865 t4_tls_mod_load();
1866
1867 tcp_protosw = pffindproto(PF_INET, IPPROTO_TCP, SOCK_STREAM);
1868 if (tcp_protosw == NULL)
1869 return (ENOPROTOOPT);
1870 bcopy(tcp_protosw, &toe_protosw, sizeof(toe_protosw));
1871 bcopy(tcp_protosw->pr_usrreqs, &toe_usrreqs, sizeof(toe_usrreqs));
1872 toe_usrreqs.pru_aio_queue = t4_aio_queue_tom;
1873 toe_protosw.pr_usrreqs = &toe_usrreqs;
1874
1875 tcp6_protosw = pffindproto(PF_INET6, IPPROTO_TCP, SOCK_STREAM);
1876 if (tcp6_protosw == NULL)
1877 return (ENOPROTOOPT);
1878 bcopy(tcp6_protosw, &toe6_protosw, sizeof(toe6_protosw));
1879 bcopy(tcp6_protosw->pr_usrreqs, &toe6_usrreqs, sizeof(toe6_usrreqs));
1880 toe6_usrreqs.pru_aio_queue = t4_aio_queue_tom;
1881 toe6_protosw.pr_usrreqs = &toe6_usrreqs;
1882
1883 return (t4_register_uld(&tom_uld_info));
1884 }
1885
1886 static void
tom_uninit(struct adapter * sc,void * arg __unused)1887 tom_uninit(struct adapter *sc, void *arg __unused)
1888 {
1889 if (begin_synchronized_op(sc, NULL, SLEEP_OK | INTR_OK, "t4tomun"))
1890 return;
1891
1892 /* Try to free resources (works only if no port has IFCAP_TOE) */
1893 if (uld_active(sc, ULD_TOM))
1894 t4_deactivate_uld(sc, ULD_TOM);
1895
1896 end_synchronized_op(sc, 0);
1897 }
1898
1899 static int
t4_tom_mod_unload(void)1900 t4_tom_mod_unload(void)
1901 {
1902 t4_iterate(tom_uninit, NULL);
1903
1904 if (t4_unregister_uld(&tom_uld_info) == EBUSY)
1905 return (EBUSY);
1906
1907 t4_tls_mod_unload();
1908 t4_ddp_mod_unload();
1909
1910 t4_uninit_connect_cpl_handlers();
1911 t4_uninit_listen_cpl_handlers();
1912 t4_uninit_cpl_io_handlers();
1913 t4_register_shared_cpl_handler(CPL_L2T_WRITE_RPL, NULL, CPL_COOKIE_TOM);
1914 t4_register_cpl_handler(CPL_GET_TCB_RPL, NULL);
1915
1916 return (0);
1917 }
1918 #endif /* TCP_OFFLOAD */
1919
1920 static int
t4_tom_modevent(module_t mod,int cmd,void * arg)1921 t4_tom_modevent(module_t mod, int cmd, void *arg)
1922 {
1923 int rc = 0;
1924
1925 #ifdef TCP_OFFLOAD
1926 switch (cmd) {
1927 case MOD_LOAD:
1928 rc = t4_tom_mod_load();
1929 break;
1930
1931 case MOD_UNLOAD:
1932 rc = t4_tom_mod_unload();
1933 break;
1934
1935 default:
1936 rc = EINVAL;
1937 }
1938 #else
1939 printf("t4_tom: compiled without TCP_OFFLOAD support.\n");
1940 rc = EOPNOTSUPP;
1941 #endif
1942 return (rc);
1943 }
1944
1945 static moduledata_t t4_tom_moddata= {
1946 "t4_tom",
1947 t4_tom_modevent,
1948 0
1949 };
1950
1951 MODULE_VERSION(t4_tom, 1);
1952 MODULE_DEPEND(t4_tom, toecore, 1, 1, 1);
1953 MODULE_DEPEND(t4_tom, t4nex, 1, 1, 1);
1954 DECLARE_MODULE(t4_tom, t4_tom_moddata, SI_SUB_EXEC, SI_ORDER_ANY);
1955