1 /*-
2 * Copyright (c) 2012 Chelsio Communications, Inc.
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in the
12 * documentation and/or other materials provided with the distribution.
13 *
14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
15 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
17 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
24 * SUCH DAMAGE.
25 */
26
27 #include <sys/cdefs.h>
28 __FBSDID("$FreeBSD$");
29
30 #include "opt_inet.h"
31
32 #ifdef TCP_OFFLOAD
33 #include <sys/param.h>
34 #include <sys/systm.h>
35 #include <sys/fcntl.h>
36 #include <sys/kernel.h>
37 #include <sys/limits.h>
38 #include <sys/ktr.h>
39 #include <sys/lock.h>
40 #include <sys/mbuf.h>
41 #include <sys/mutex.h>
42 #include <sys/sockstate.h>
43 #include <sys/sockopt.h>
44 #include <sys/socket.h>
45 #include <sys/socketvar.h>
46 #include <sys/sockbuf.h>
47 #include <sys/sysctl.h>
48 #include <sys/syslog.h>
49 #include <sys/protosw.h>
50 #include <sys/priv.h>
51 #include <sys/sglist.h>
52 #include <sys/taskqueue.h>
53
54 #include <net/if.h>
55 #include <net/if_var.h>
56 #include <net/ethernet.h>
57 #include <net/route.h>
58
59 #include <netinet/in.h>
60 #include <netinet/in_pcb.h>
61 #include <netinet/in_systm.h>
62 #include <netinet/in_var.h>
63
64 #include <netinet/ip.h>
65 #include <netinet/tcp_var.h>
66 #define TCPSTATES
67 #include <netinet/tcp_fsm.h>
68 #include <netinet/toecore.h>
69 #include <netinet/tcp_seq.h>
70 #include <netinet/tcp_timer.h>
71 #include <net/route.h>
72
73 #include "cxgb_include.h"
74 #include "ulp/tom/cxgb_l2t.h"
75 #include "ulp/tom/cxgb_tom.h"
76 #include "ulp/tom/cxgb_toepcb.h"
77
78 VNET_DECLARE(int, tcp_do_autosndbuf);
79 #define V_tcp_do_autosndbuf VNET(tcp_do_autosndbuf)
80 VNET_DECLARE(int, tcp_autosndbuf_inc);
81 #define V_tcp_autosndbuf_inc VNET(tcp_autosndbuf_inc)
82 VNET_DECLARE(int, tcp_autosndbuf_max);
83 #define V_tcp_autosndbuf_max VNET(tcp_autosndbuf_max)
84 VNET_DECLARE(int, tcp_do_autorcvbuf);
85 #define V_tcp_do_autorcvbuf VNET(tcp_do_autorcvbuf)
86 VNET_DECLARE(int, tcp_autorcvbuf_inc);
87 #define V_tcp_autorcvbuf_inc VNET(tcp_autorcvbuf_inc)
88 VNET_DECLARE(int, tcp_autorcvbuf_max);
89 #define V_tcp_autorcvbuf_max VNET(tcp_autorcvbuf_max)
90 extern int always_keepalive;
91
92 /*
93 * For ULP connections HW may add headers, e.g., for digests, that aren't part
94 * of the messages sent by the host but that are part of the TCP payload and
95 * therefore consume TCP sequence space. Tx connection parameters that
96 * operate in TCP sequence space are affected by the HW additions and need to
97 * compensate for them to accurately track TCP sequence numbers. This array
98 * contains the compensating extra lengths for ULP packets. It is indexed by
99 * a packet's ULP submode.
100 */
101 const unsigned int t3_ulp_extra_len[] = {0, 4, 4, 8};
102
103 /*
104 * Max receive window supported by HW in bytes. Only a small part of it can
105 * be set through option0, the rest needs to be set through RX_DATA_ACK.
106 */
107 #define MAX_RCV_WND ((1U << 27) - 1)
108
109 /*
110 * Min receive window. We want it to be large enough to accommodate receive
111 * coalescing, handle jumbo frames, and not trigger sender SWS avoidance.
112 */
113 #define MIN_RCV_WND (24 * 1024U)
114 #define INP_TOS(inp) ((inp_ip_tos_get(inp) >> 2) & M_TOS)
115
116 static void t3_release_offload_resources(struct toepcb *);
117 static void send_reset(struct toepcb *toep);
118
119 /*
120 * Called after the last CPL for the toepcb has been received.
121 *
122 * The inp must be wlocked on entry and is unlocked (or maybe destroyed) by the
123 * time this function exits.
124 */
125 static int
toepcb_release(struct toepcb * toep)126 toepcb_release(struct toepcb *toep)
127 {
128 struct inpcb *inp = toep->tp_inp;
129 struct toedev *tod = toep->tp_tod;
130 struct tom_data *td = t3_tomdata(tod);
131 int rc;
132
133 INP_WLOCK_ASSERT(inp);
134 KASSERT(!(toep->tp_flags & TP_CPL_DONE),
135 ("%s: double release?", __func__));
136
137 CTR2(KTR_CXGB, "%s: tid %d", __func__, toep->tp_tid);
138
139 toep->tp_flags |= TP_CPL_DONE;
140 toep->tp_inp = NULL;
141
142 mtx_lock(&td->toep_list_lock);
143 TAILQ_REMOVE(&td->toep_list, toep, link);
144 mtx_unlock(&td->toep_list_lock);
145
146 if (!(toep->tp_flags & TP_ATTACHED))
147 t3_release_offload_resources(toep);
148
149 rc = in_pcbrele_wlocked(inp);
150 if (!rc)
151 INP_WUNLOCK(inp);
152 return (rc);
153 }
154
155 /*
156 * One sided detach. The tcpcb is going away and we need to unhook the toepcb
157 * hanging off it. If the TOE driver is also done with the toepcb we'll release
158 * all offload resources.
159 */
160 static void
toepcb_detach(struct inpcb * inp)161 toepcb_detach(struct inpcb *inp)
162 {
163 struct toepcb *toep;
164 struct tcpcb *tp;
165
166 KASSERT(inp, ("%s: inp is NULL", __func__));
167 INP_WLOCK_ASSERT(inp);
168
169 tp = intotcpcb(inp);
170 toep = tp->t_toe;
171
172 KASSERT(toep != NULL, ("%s: toep is NULL", __func__));
173 KASSERT(toep->tp_flags & TP_ATTACHED, ("%s: not attached", __func__));
174
175 CTR6(KTR_CXGB, "%s: %s %u, toep %p, inp %p, tp %p", __func__,
176 tp->t_state == TCPS_SYN_SENT ? "atid" : "tid", toep->tp_tid,
177 toep, inp, tp);
178
179 tp->t_toe = NULL;
180 tp->t_flags &= ~TF_TOE;
181 toep->tp_flags &= ~TP_ATTACHED;
182
183 if (toep->tp_flags & TP_CPL_DONE)
184 t3_release_offload_resources(toep);
185 }
186
187 void
t3_pcb_detach(struct toedev * tod __unused,struct tcpcb * tp)188 t3_pcb_detach(struct toedev *tod __unused, struct tcpcb *tp)
189 {
190
191 toepcb_detach(tp->t_inpcb);
192 }
193
194 static int
alloc_atid(struct tid_info * t,void * ctx)195 alloc_atid(struct tid_info *t, void *ctx)
196 {
197 int atid = -1;
198
199 mtx_lock(&t->atid_lock);
200 if (t->afree) {
201 union active_open_entry *p = t->afree;
202
203 atid = (p - t->atid_tab) + t->atid_base;
204 t->afree = p->next;
205 p->ctx = ctx;
206 t->atids_in_use++;
207 }
208 mtx_unlock(&t->atid_lock);
209
210 return (atid);
211 }
212
213 static void
free_atid(struct tid_info * t,int atid)214 free_atid(struct tid_info *t, int atid)
215 {
216 union active_open_entry *p = atid2entry(t, atid);
217
218 mtx_lock(&t->atid_lock);
219 p->next = t->afree;
220 t->afree = p;
221 t->atids_in_use--;
222 mtx_unlock(&t->atid_lock);
223 }
224
225 void
insert_tid(struct tom_data * td,void * ctx,unsigned int tid)226 insert_tid(struct tom_data *td, void *ctx, unsigned int tid)
227 {
228 struct tid_info *t = &td->tid_maps;
229
230 t->tid_tab[tid] = ctx;
231 atomic_add_int(&t->tids_in_use, 1);
232 }
233
234 void
update_tid(struct tom_data * td,void * ctx,unsigned int tid)235 update_tid(struct tom_data *td, void *ctx, unsigned int tid)
236 {
237 struct tid_info *t = &td->tid_maps;
238
239 t->tid_tab[tid] = ctx;
240 }
241
242 void
remove_tid(struct tom_data * td,unsigned int tid)243 remove_tid(struct tom_data *td, unsigned int tid)
244 {
245 struct tid_info *t = &td->tid_maps;
246
247 t->tid_tab[tid] = NULL;
248 atomic_add_int(&t->tids_in_use, -1);
249 }
250
251 /* use ctx as a next pointer in the tid release list */
252 void
queue_tid_release(struct toedev * tod,unsigned int tid)253 queue_tid_release(struct toedev *tod, unsigned int tid)
254 {
255 struct tom_data *td = t3_tomdata(tod);
256 void **p = &td->tid_maps.tid_tab[tid];
257 struct adapter *sc = tod->tod_softc;
258
259 mtx_lock(&td->tid_release_lock);
260 *p = td->tid_release_list;
261 td->tid_release_list = p;
262 if (!*p)
263 taskqueue_enqueue(sc->tq, &td->tid_release_task);
264 mtx_unlock(&td->tid_release_lock);
265 }
266
267 /*
268 * Populate a TID_RELEASE WR.
269 */
270 static inline void
mk_tid_release(struct cpl_tid_release * cpl,unsigned int tid)271 mk_tid_release(struct cpl_tid_release *cpl, unsigned int tid)
272 {
273
274 cpl->wr.wrh_hi = htonl(V_WR_OP(FW_WROPCODE_FORWARD));
275 OPCODE_TID(cpl) = htonl(MK_OPCODE_TID(CPL_TID_RELEASE, tid));
276 }
277
278 void
release_tid(struct toedev * tod,unsigned int tid,int qset)279 release_tid(struct toedev *tod, unsigned int tid, int qset)
280 {
281 struct tom_data *td = t3_tomdata(tod);
282 struct adapter *sc = tod->tod_softc;
283 struct mbuf *m;
284 struct cpl_tid_release *cpl;
285 #ifdef INVARIANTS
286 struct tid_info *t = &td->tid_maps;
287 #endif
288
289 KASSERT(tid >= 0 && tid < t->ntids,
290 ("%s: tid=%d, ntids=%d", __func__, tid, t->ntids));
291
292 m = M_GETHDR_OFLD(qset, CPL_PRIORITY_CONTROL, cpl);
293 if (m) {
294 mk_tid_release(cpl, tid);
295 t3_offload_tx(sc, m);
296 remove_tid(td, tid);
297 } else
298 queue_tid_release(tod, tid);
299
300 }
301
302 void
t3_process_tid_release_list(void * data,int pending)303 t3_process_tid_release_list(void *data, int pending)
304 {
305 struct mbuf *m;
306 struct tom_data *td = data;
307 struct adapter *sc = td->tod.tod_softc;
308
309 mtx_lock(&td->tid_release_lock);
310 while (td->tid_release_list) {
311 void **p = td->tid_release_list;
312 unsigned int tid = p - td->tid_maps.tid_tab;
313 struct cpl_tid_release *cpl;
314
315 td->tid_release_list = (void **)*p;
316 m = M_GETHDR_OFLD(0, CPL_PRIORITY_CONTROL, cpl); /* qs 0 here */
317 if (m == NULL)
318 break; /* XXX: who reschedules the release task? */
319 mtx_unlock(&td->tid_release_lock);
320 mk_tid_release(cpl, tid);
321 t3_offload_tx(sc, m);
322 remove_tid(td, tid);
323 mtx_lock(&td->tid_release_lock);
324 }
325 mtx_unlock(&td->tid_release_lock);
326 }
327
328 static void
close_conn(struct adapter * sc,struct toepcb * toep)329 close_conn(struct adapter *sc, struct toepcb *toep)
330 {
331 struct mbuf *m;
332 struct cpl_close_con_req *req;
333
334 if (toep->tp_flags & TP_FIN_SENT)
335 return;
336
337 m = M_GETHDR_OFLD(toep->tp_qset, CPL_PRIORITY_DATA, req);
338 if (m == NULL)
339 CXGB_UNIMPLEMENTED();
340
341 req->wr.wrh_hi = htonl(V_WR_OP(FW_WROPCODE_OFLD_CLOSE_CON));
342 req->wr.wrh_lo = htonl(V_WR_TID(toep->tp_tid));
343 OPCODE_TID(req) = htonl(MK_OPCODE_TID(CPL_CLOSE_CON_REQ, toep->tp_tid));
344 req->rsvd = 0;
345
346 toep->tp_flags |= TP_FIN_SENT;
347 t3_offload_tx(sc, m);
348 }
349
350 static inline void
make_tx_data_wr(struct socket * so,struct tx_data_wr * req,int len,struct mbuf * tail)351 make_tx_data_wr(struct socket *so, struct tx_data_wr *req, int len,
352 struct mbuf *tail)
353 {
354 struct tcpcb *tp = so_sototcpcb(so);
355 struct toepcb *toep = tp->t_toe;
356 struct sockbuf *snd;
357
358 inp_lock_assert(tp->t_inpcb);
359 snd = so_sockbuf_snd(so);
360
361 req->wr.wrh_hi = htonl(V_WR_OP(FW_WROPCODE_OFLD_TX_DATA));
362 req->wr.wrh_lo = htonl(V_WR_TID(toep->tp_tid));
363 /* len includes the length of any HW ULP additions */
364 req->len = htonl(len);
365 req->param = htonl(V_TX_PORT(toep->tp_l2t->smt_idx));
366 /* V_TX_ULP_SUBMODE sets both the mode and submode */
367 req->flags = htonl(V_TX_ULP_SUBMODE(toep->tp_ulp_mode) | V_TX_URG(0) |
368 V_TX_SHOVE(!(tp->t_flags & TF_MORETOCOME) && (tail ? 0 : 1)));
369 req->sndseq = htonl(tp->snd_nxt);
370 if (__predict_false((toep->tp_flags & TP_DATASENT) == 0)) {
371 struct adapter *sc = toep->tp_tod->tod_softc;
372 int cpu_idx = sc->rrss_map[toep->tp_qset];
373
374 req->flags |= htonl(V_TX_ACK_PAGES(2) | F_TX_INIT |
375 V_TX_CPU_IDX(cpu_idx));
376
377 /* Sendbuffer is in units of 32KB. */
378 if (V_tcp_do_autosndbuf && snd->sb_flags & SB_AUTOSIZE)
379 req->param |= htonl(V_TX_SNDBUF(VNET(tcp_autosndbuf_max) >> 15));
380 else
381 req->param |= htonl(V_TX_SNDBUF(snd->sb_hiwat >> 15));
382
383 toep->tp_flags |= TP_DATASENT;
384 }
385 }
386
387 /*
388 * TOM_XXX_DUPLICATION sgl_len, calc_tx_descs, calc_tx_descs_ofld, mbuf_wrs, etc.
389 * TOM_XXX_MOVE to some common header file.
390 */
391 /*
392 * IMM_LEN: # of bytes that can be tx'd as immediate data. There are 16 flits
393 * in a tx desc; subtract 3 for tx_data_wr (including the WR header), and 1 more
394 * for the second gen bit flit. This leaves us with 12 flits.
395 *
396 * descs_to_sgllen: # of SGL entries that can fit into the given # of tx descs.
397 * The first desc has a tx_data_wr (which includes the WR header), the rest have
398 * the WR header only. All descs have the second gen bit flit.
399 *
400 * sgllen_to_descs: # of tx descs used up by an sgl of given length. The first
401 * desc has a tx_data_wr (which includes the WR header), the rest have the WR
402 * header only. All descs have the second gen bit flit.
403 *
404 * flits_to_sgllen: # of SGL entries that can be fit in the given # of flits.
405 *
406 */
407 #define IMM_LEN 96
408 static int descs_to_sgllen[TX_MAX_DESC + 1] = {0, 8, 17, 26, 35};
409 static int sgllen_to_descs[TX_MAX_SEGS] = {
410 0, 1, 1, 1, 1, 1, 1, 1, 1, 2, /* 0 - 9 */
411 2, 2, 2, 2, 2, 2, 2, 2, 3, 3, /* 10 - 19 */
412 3, 3, 3, 3, 3, 3, 3, 4, 4, 4, /* 20 - 29 */
413 4, 4, 4, 4, 4, 4 /* 30 - 35 */
414 };
415 #if 0
416 static int flits_to_sgllen[TX_DESC_FLITS + 1] = {
417 0, 0, 1, 2, 2, 3, 4, 4, 5, 6, 6, 7, 8, 8, 9, 10, 10
418 };
419 #endif
420 #if SGE_NUM_GENBITS != 2
421 #error "SGE_NUM_GENBITS really must be 2"
422 #endif
423
424 int
t3_push_frames(struct socket * so,int req_completion)425 t3_push_frames(struct socket *so, int req_completion)
426 {
427 struct tcpcb *tp = so_sototcpcb(so);
428 struct toepcb *toep = tp->t_toe;
429 struct mbuf *m0, *sndptr, *m;
430 struct toedev *tod = toep->tp_tod;
431 struct adapter *sc = tod->tod_softc;
432 int bytes, ndesc, total_bytes = 0, mlen;
433 struct sockbuf *snd;
434 struct sglist *sgl;
435 struct ofld_hdr *oh;
436 caddr_t dst;
437 struct tx_data_wr *wr;
438
439 inp_lock_assert(tp->t_inpcb);
440
441 snd = so_sockbuf_snd(so);
442 SOCKBUF_LOCK(snd);
443
444 /*
445 * Autosize the send buffer.
446 */
447 if (snd->sb_flags & SB_AUTOSIZE && VNET(tcp_do_autosndbuf)) {
448 if (sbused(snd) >= (snd->sb_hiwat / 8 * 7) &&
449 sbused(snd) < VNET(tcp_autosndbuf_max)) {
450 if (!sbreserve_locked(snd, min(snd->sb_hiwat +
451 VNET(tcp_autosndbuf_inc), VNET(tcp_autosndbuf_max)),
452 so, curthread))
453 snd->sb_flags &= ~SB_AUTOSIZE;
454 }
455 }
456
457 if (toep->tp_m_last && toep->tp_m_last == snd->sb_sndptr)
458 sndptr = toep->tp_m_last->m_next;
459 else
460 sndptr = snd->sb_sndptr ? snd->sb_sndptr : snd->sb_mb;
461
462 /* Nothing to send or no WRs available for sending data */
463 if (toep->tp_wr_avail == 0 || sndptr == NULL)
464 goto out;
465
466 /* Something to send and at least 1 WR available */
467 while (toep->tp_wr_avail && sndptr != NULL) {
468
469 m0 = m_gethdr(M_NOWAIT, MT_DATA);
470 if (m0 == NULL)
471 break;
472 oh = mtod(m0, struct ofld_hdr *);
473 wr = (void *)(oh + 1);
474 dst = (void *)(wr + 1);
475
476 m0->m_pkthdr.len = m0->m_len = sizeof(*oh) + sizeof(*wr);
477 oh->flags = V_HDR_CTRL(CPL_PRIORITY_DATA) | F_HDR_DF |
478 V_HDR_QSET(toep->tp_qset);
479
480 /*
481 * Try to construct an immediate data WR if possible. Stuff as
482 * much data into it as possible, one whole mbuf at a time.
483 */
484 mlen = sndptr->m_len;
485 ndesc = bytes = 0;
486 while (mlen <= IMM_LEN - bytes) {
487 bcopy(sndptr->m_data, dst, mlen);
488 bytes += mlen;
489 dst += mlen;
490
491 if (!(sndptr = sndptr->m_next))
492 break;
493 mlen = sndptr->m_len;
494 }
495
496 if (bytes) {
497
498 /* Was able to fit 'bytes' bytes in an immediate WR */
499
500 ndesc = 1;
501 make_tx_data_wr(so, wr, bytes, sndptr);
502
503 m0->m_len += bytes;
504 m0->m_pkthdr.len = m0->m_len;
505
506 } else {
507 int wr_avail = min(toep->tp_wr_avail, TX_MAX_DESC);
508
509 /* Need to make an SGL */
510
511 sgl = sglist_alloc(descs_to_sgllen[wr_avail], M_NOWAIT);
512 if (sgl == NULL)
513 break;
514
515 for (m = sndptr; m != NULL; m = m->m_next) {
516 if ((mlen = m->m_len) > 0) {
517 if (sglist_append(sgl, m->m_data, mlen))
518 break;
519 }
520 bytes += mlen;
521 }
522 sndptr = m;
523 if (bytes == 0) {
524 sglist_free(sgl);
525 break;
526 }
527 ndesc = sgllen_to_descs[sgl->sg_nseg];
528 oh->flags |= F_HDR_SGL;
529 oh->sgl = sgl;
530 make_tx_data_wr(so, wr, bytes, sndptr);
531 }
532
533 oh->flags |= V_HDR_NDESC(ndesc);
534 oh->plen = bytes;
535
536 snd->sb_sndptr = sndptr;
537 snd->sb_sndptroff += bytes;
538 if (sndptr == NULL) {
539 snd->sb_sndptr = snd->sb_mbtail;
540 snd->sb_sndptroff -= snd->sb_mbtail->m_len;
541 toep->tp_m_last = snd->sb_mbtail;
542 } else
543 toep->tp_m_last = NULL;
544
545 total_bytes += bytes;
546
547 toep->tp_wr_avail -= ndesc;
548 toep->tp_wr_unacked += ndesc;
549
550 if ((req_completion && toep->tp_wr_unacked == ndesc) ||
551 toep->tp_wr_unacked >= toep->tp_wr_max / 2) {
552 wr->wr.wrh_hi |= htonl(F_WR_COMPL);
553 toep->tp_wr_unacked = 0;
554 }
555
556 enqueue_wr(toep, m0);
557 l2t_send(sc, m0, toep->tp_l2t);
558 }
559 out:
560 SOCKBUF_UNLOCK(snd);
561
562 if (sndptr == NULL && (toep->tp_flags & TP_SEND_FIN))
563 close_conn(sc, toep);
564
565 return (total_bytes);
566 }
567
568 static int
send_rx_credits(struct adapter * sc,struct toepcb * toep,int credits)569 send_rx_credits(struct adapter *sc, struct toepcb *toep, int credits)
570 {
571 struct mbuf *m;
572 struct cpl_rx_data_ack *req;
573 uint32_t dack = F_RX_DACK_CHANGE | V_RX_DACK_MODE(1);
574
575 m = M_GETHDR_OFLD(toep->tp_qset, CPL_PRIORITY_CONTROL, req);
576 if (m == NULL)
577 return (0);
578
579 req->wr.wrh_hi = htonl(V_WR_OP(FW_WROPCODE_FORWARD));
580 req->wr.wrh_lo = 0;
581 OPCODE_TID(req) = htonl(MK_OPCODE_TID(CPL_RX_DATA_ACK, toep->tp_tid));
582 req->credit_dack = htonl(dack | V_RX_CREDITS(credits));
583 t3_offload_tx(sc, m);
584 return (credits);
585 }
586
587 void
t3_rcvd(struct toedev * tod,struct tcpcb * tp)588 t3_rcvd(struct toedev *tod, struct tcpcb *tp)
589 {
590 struct adapter *sc = tod->tod_softc;
591 struct inpcb *inp = tp->t_inpcb;
592 struct socket *so = inp->inp_socket;
593 struct sockbuf *so_rcv = &so->so_rcv;
594 struct toepcb *toep = tp->t_toe;
595 int must_send;
596
597 INP_WLOCK_ASSERT(inp);
598
599 SOCKBUF_LOCK(so_rcv);
600 KASSERT(toep->tp_enqueued >= sbused(so_rcv),
601 ("%s: sbused(so_rcv) > enqueued", __func__));
602 toep->tp_rx_credits += toep->tp_enqueued - sbused(so_rcv);
603 toep->tp_enqueued = sbused(so_rcv);
604 SOCKBUF_UNLOCK(so_rcv);
605
606 must_send = toep->tp_rx_credits + 16384 >= tp->rcv_wnd;
607 if (must_send || toep->tp_rx_credits >= 15 * 1024) {
608 int credits;
609
610 credits = send_rx_credits(sc, toep, toep->tp_rx_credits);
611 toep->tp_rx_credits -= credits;
612 tp->rcv_wnd += credits;
613 tp->rcv_adv += credits;
614 }
615 }
616
617 static int
do_rx_urg_notify(struct sge_qset * qs,struct rsp_desc * r,struct mbuf * m)618 do_rx_urg_notify(struct sge_qset *qs, struct rsp_desc *r, struct mbuf *m)
619 {
620 struct adapter *sc = qs->adap;
621 struct tom_data *td = sc->tom_softc;
622 struct cpl_rx_urg_notify *hdr = mtod(m, void *);
623 unsigned int tid = GET_TID(hdr);
624 struct toepcb *toep = lookup_tid(&td->tid_maps, tid);
625
626 log(LOG_ERR, "%s: tid %u inp %p", __func__, tid, toep->tp_inp);
627
628 m_freem(m);
629 return (0);
630 }
631
632 int
t3_send_fin(struct toedev * tod,struct tcpcb * tp)633 t3_send_fin(struct toedev *tod, struct tcpcb *tp)
634 {
635 struct toepcb *toep = tp->t_toe;
636 struct inpcb *inp = tp->t_inpcb;
637 struct socket *so = inp_inpcbtosocket(inp);
638 #if defined(KTR)
639 unsigned int tid = toep->tp_tid;
640 #endif
641
642 INP_INFO_RLOCK_ASSERT(&V_tcbinfo);
643 INP_WLOCK_ASSERT(inp);
644
645 CTR4(KTR_CXGB, "%s: tid %d, toep %p, flags %x", __func__, tid, toep,
646 toep->tp_flags);
647
648 toep->tp_flags |= TP_SEND_FIN;
649 t3_push_frames(so, 1);
650
651 return (0);
652 }
653
654 int
t3_tod_output(struct toedev * tod,struct tcpcb * tp)655 t3_tod_output(struct toedev *tod, struct tcpcb *tp)
656 {
657 struct inpcb *inp = tp->t_inpcb;
658 struct socket *so = inp->inp_socket;
659
660 t3_push_frames(so, 1);
661 return (0);
662 }
663
664 /* What mtu_idx to use, given a 4-tuple and/or an MSS cap */
665 int
find_best_mtu_idx(struct adapter * sc,struct in_conninfo * inc,int pmss)666 find_best_mtu_idx(struct adapter *sc, struct in_conninfo *inc, int pmss)
667 {
668 unsigned short *mtus = &sc->params.mtus[0];
669 int i = 0, mss;
670
671 KASSERT(inc != NULL || pmss > 0,
672 ("%s: at least one of inc/pmss must be specified", __func__));
673
674 mss = inc ? tcp_mssopt(inc) : pmss;
675 if (pmss > 0 && mss > pmss)
676 mss = pmss;
677
678 while (i < NMTUS - 1 && mtus[i + 1] <= mss + 40)
679 ++i;
680
681 return (i);
682 }
683
684 static inline void
purge_wr_queue(struct toepcb * toep)685 purge_wr_queue(struct toepcb *toep)
686 {
687 struct mbuf *m;
688 struct ofld_hdr *oh;
689
690 while ((m = mbufq_dequeue(&toep->wr_list)) != NULL) {
691 oh = mtod(m, struct ofld_hdr *);
692 if (oh->flags & F_HDR_SGL)
693 sglist_free(oh->sgl);
694 m_freem(m);
695 }
696 }
697
698 /*
699 * Release cxgb(4) and T3 resources held by an offload connection (TID, L2T
700 * entry, etc.)
701 */
702 static void
t3_release_offload_resources(struct toepcb * toep)703 t3_release_offload_resources(struct toepcb *toep)
704 {
705 struct toedev *tod = toep->tp_tod;
706 struct tom_data *td = t3_tomdata(tod);
707
708 /*
709 * The TOM explicitly detaches its toepcb from the system's inp before
710 * it releases the offload resources.
711 */
712 if (toep->tp_inp) {
713 panic("%s: inp %p still attached to toepcb %p",
714 __func__, toep->tp_inp, toep);
715 }
716
717 if (toep->tp_wr_avail != toep->tp_wr_max)
718 purge_wr_queue(toep);
719
720 if (toep->tp_l2t) {
721 l2t_release(td->l2t, toep->tp_l2t);
722 toep->tp_l2t = NULL;
723 }
724
725 if (toep->tp_tid >= 0)
726 release_tid(tod, toep->tp_tid, toep->tp_qset);
727
728 toepcb_free(toep);
729 }
730
731 /*
732 * Determine the receive window size for a socket.
733 */
734 unsigned long
select_rcv_wnd(struct socket * so)735 select_rcv_wnd(struct socket *so)
736 {
737 unsigned long wnd;
738
739 SOCKBUF_LOCK_ASSERT(&so->so_rcv);
740
741 wnd = sbspace(&so->so_rcv);
742 if (wnd < MIN_RCV_WND)
743 wnd = MIN_RCV_WND;
744
745 return min(wnd, MAX_RCV_WND);
746 }
747
748 int
select_rcv_wscale(void)749 select_rcv_wscale(void)
750 {
751 int wscale = 0;
752 unsigned long space = sb_max;
753
754 if (space > MAX_RCV_WND)
755 space = MAX_RCV_WND;
756
757 while (wscale < TCP_MAX_WINSHIFT && (TCP_MAXWIN << wscale) < space)
758 wscale++;
759
760 return (wscale);
761 }
762
763
764 /*
765 * Set up the socket for TCP offload.
766 */
767 void
offload_socket(struct socket * so,struct toepcb * toep)768 offload_socket(struct socket *so, struct toepcb *toep)
769 {
770 struct toedev *tod = toep->tp_tod;
771 struct tom_data *td = t3_tomdata(tod);
772 struct inpcb *inp = sotoinpcb(so);
773 struct tcpcb *tp = intotcpcb(inp);
774
775 INP_WLOCK_ASSERT(inp);
776
777 /* Update socket */
778 SOCKBUF_LOCK(&so->so_snd);
779 so_sockbuf_snd(so)->sb_flags |= SB_NOCOALESCE;
780 SOCKBUF_UNLOCK(&so->so_snd);
781 SOCKBUF_LOCK(&so->so_rcv);
782 so_sockbuf_rcv(so)->sb_flags |= SB_NOCOALESCE;
783 SOCKBUF_UNLOCK(&so->so_rcv);
784
785 /* Update TCP PCB */
786 tp->tod = toep->tp_tod;
787 tp->t_toe = toep;
788 tp->t_flags |= TF_TOE;
789
790 /* Install an extra hold on inp */
791 toep->tp_inp = inp;
792 toep->tp_flags |= TP_ATTACHED;
793 in_pcbref(inp);
794
795 /* Add the TOE PCB to the active list */
796 mtx_lock(&td->toep_list_lock);
797 TAILQ_INSERT_HEAD(&td->toep_list, toep, link);
798 mtx_unlock(&td->toep_list_lock);
799 }
800
801 /* This is _not_ the normal way to "unoffload" a socket. */
802 void
undo_offload_socket(struct socket * so)803 undo_offload_socket(struct socket *so)
804 {
805 struct inpcb *inp = sotoinpcb(so);
806 struct tcpcb *tp = intotcpcb(inp);
807 struct toepcb *toep = tp->t_toe;
808 struct toedev *tod = toep->tp_tod;
809 struct tom_data *td = t3_tomdata(tod);
810
811 INP_WLOCK_ASSERT(inp);
812
813 so_sockbuf_snd(so)->sb_flags &= ~SB_NOCOALESCE;
814 so_sockbuf_rcv(so)->sb_flags &= ~SB_NOCOALESCE;
815
816 tp->tod = NULL;
817 tp->t_toe = NULL;
818 tp->t_flags &= ~TF_TOE;
819
820 toep->tp_inp = NULL;
821 toep->tp_flags &= ~TP_ATTACHED;
822 if (in_pcbrele_wlocked(inp))
823 panic("%s: inp freed.", __func__);
824
825 mtx_lock(&td->toep_list_lock);
826 TAILQ_REMOVE(&td->toep_list, toep, link);
827 mtx_unlock(&td->toep_list_lock);
828 }
829
830 /*
831 * Socket could be a listening socket, and we may not have a toepcb at all at
832 * this time.
833 */
834 uint32_t
calc_opt0h(struct socket * so,int mtu_idx,int rscale,struct l2t_entry * e)835 calc_opt0h(struct socket *so, int mtu_idx, int rscale, struct l2t_entry *e)
836 {
837 uint32_t opt0h = F_TCAM_BYPASS | V_WND_SCALE(rscale) |
838 V_MSS_IDX(mtu_idx);
839
840 if (so != NULL) {
841 struct inpcb *inp = sotoinpcb(so);
842 struct tcpcb *tp = intotcpcb(inp);
843 int keepalive = always_keepalive ||
844 so_options_get(so) & SO_KEEPALIVE;
845
846 opt0h |= V_NAGLE((tp->t_flags & TF_NODELAY) == 0);
847 opt0h |= V_KEEP_ALIVE(keepalive != 0);
848 }
849
850 if (e != NULL)
851 opt0h |= V_L2T_IDX(e->idx) | V_TX_CHANNEL(e->smt_idx);
852
853 return (htobe32(opt0h));
854 }
855
856 uint32_t
calc_opt0l(struct socket * so,int rcv_bufsize)857 calc_opt0l(struct socket *so, int rcv_bufsize)
858 {
859 uint32_t opt0l = V_ULP_MODE(ULP_MODE_NONE) | V_RCV_BUFSIZ(rcv_bufsize);
860
861 KASSERT(rcv_bufsize <= M_RCV_BUFSIZ,
862 ("%s: rcv_bufsize (%d) is too high", __func__, rcv_bufsize));
863
864 if (so != NULL) /* optional because noone cares about IP TOS */
865 opt0l |= V_TOS(INP_TOS(sotoinpcb(so)));
866
867 return (htobe32(opt0l));
868 }
869
870 /*
871 * Convert an ACT_OPEN_RPL status to an errno.
872 */
873 static int
act_open_rpl_status_to_errno(int status)874 act_open_rpl_status_to_errno(int status)
875 {
876 switch (status) {
877 case CPL_ERR_CONN_RESET:
878 return (ECONNREFUSED);
879 case CPL_ERR_ARP_MISS:
880 return (EHOSTUNREACH);
881 case CPL_ERR_CONN_TIMEDOUT:
882 return (ETIMEDOUT);
883 case CPL_ERR_TCAM_FULL:
884 return (EAGAIN);
885 case CPL_ERR_CONN_EXIST:
886 log(LOG_ERR, "ACTIVE_OPEN_RPL: 4-tuple in use\n");
887 return (EAGAIN);
888 default:
889 return (EIO);
890 }
891 }
892
893 /*
894 * Return whether a failed active open has allocated a TID
895 */
896 static inline int
act_open_has_tid(int status)897 act_open_has_tid(int status)
898 {
899 return status != CPL_ERR_TCAM_FULL && status != CPL_ERR_CONN_EXIST &&
900 status != CPL_ERR_ARP_MISS;
901 }
902
903 /*
904 * Active open failed.
905 */
906 static int
do_act_open_rpl(struct sge_qset * qs,struct rsp_desc * r,struct mbuf * m)907 do_act_open_rpl(struct sge_qset *qs, struct rsp_desc *r, struct mbuf *m)
908 {
909 struct adapter *sc = qs->adap;
910 struct tom_data *td = sc->tom_softc;
911 struct toedev *tod = &td->tod;
912 struct cpl_act_open_rpl *rpl = mtod(m, void *);
913 unsigned int atid = G_TID(ntohl(rpl->atid));
914 struct toepcb *toep = lookup_atid(&td->tid_maps, atid);
915 struct inpcb *inp = toep->tp_inp;
916 int s = rpl->status, rc;
917
918 CTR3(KTR_CXGB, "%s: atid %u, status %u ", __func__, atid, s);
919
920 free_atid(&td->tid_maps, atid);
921 toep->tp_tid = -1;
922
923 if (act_open_has_tid(s))
924 queue_tid_release(tod, GET_TID(rpl));
925
926 rc = act_open_rpl_status_to_errno(s);
927 if (rc != EAGAIN)
928 INP_INFO_RLOCK(&V_tcbinfo);
929 INP_WLOCK(inp);
930 toe_connect_failed(tod, inp, rc);
931 toepcb_release(toep); /* unlocks inp */
932 if (rc != EAGAIN)
933 INP_INFO_RUNLOCK(&V_tcbinfo);
934
935 m_freem(m);
936 return (0);
937 }
938
939 /*
940 * Send an active open request.
941 *
942 * State of affairs on entry:
943 * soisconnecting (so_state |= SS_ISCONNECTING)
944 * tcbinfo not locked (this has changed - used to be WLOCKed)
945 * inp WLOCKed
946 * tp->t_state = TCPS_SYN_SENT
947 * rtalloc1, RT_UNLOCK on rt.
948 */
949 int
t3_connect(struct toedev * tod,struct socket * so,struct rtentry * rt,struct sockaddr * nam)950 t3_connect(struct toedev *tod, struct socket *so,
951 struct rtentry *rt, struct sockaddr *nam)
952 {
953 struct mbuf *m = NULL;
954 struct l2t_entry *e = NULL;
955 struct tom_data *td = t3_tomdata(tod);
956 struct adapter *sc = tod->tod_softc;
957 struct cpl_act_open_req *cpl;
958 struct inpcb *inp = sotoinpcb(so);
959 struct tcpcb *tp = intotcpcb(inp);
960 struct toepcb *toep;
961 int atid = -1, mtu_idx, rscale, cpu_idx, qset;
962 struct sockaddr *gw;
963 struct ifnet *ifp = rt->rt_ifp;
964 struct port_info *pi = ifp->if_softc; /* XXX wrong for VLAN etc. */
965
966 INP_WLOCK_ASSERT(inp);
967
968 toep = toepcb_alloc(tod);
969 if (toep == NULL)
970 goto failed;
971
972 atid = alloc_atid(&td->tid_maps, toep);
973 if (atid < 0)
974 goto failed;
975
976 qset = pi->first_qset + (arc4random() % pi->nqsets);
977
978 m = M_GETHDR_OFLD(qset, CPL_PRIORITY_CONTROL, cpl);
979 if (m == NULL)
980 goto failed;
981
982 gw = rt->rt_flags & RTF_GATEWAY ? rt->rt_gateway : nam;
983 e = t3_l2t_get(pi, ifp, gw);
984 if (e == NULL)
985 goto failed;
986
987 toep->tp_l2t = e;
988 toep->tp_tid = atid; /* used to double check response */
989 toep->tp_qset = qset;
990
991 SOCKBUF_LOCK(&so->so_rcv);
992 /* opt0 rcv_bufsiz initially, assumes its normal meaning later */
993 toep->tp_rx_credits = min(select_rcv_wnd(so) >> 10, M_RCV_BUFSIZ);
994 SOCKBUF_UNLOCK(&so->so_rcv);
995
996 offload_socket(so, toep);
997
998 /*
999 * The kernel sets request_r_scale based on sb_max whereas we need to
1000 * take hardware's MAX_RCV_WND into account too. This is normally a
1001 * no-op as MAX_RCV_WND is much larger than the default sb_max.
1002 */
1003 if (tp->t_flags & TF_REQ_SCALE)
1004 rscale = tp->request_r_scale = select_rcv_wscale();
1005 else
1006 rscale = 0;
1007 mtu_idx = find_best_mtu_idx(sc, &inp->inp_inc, 0);
1008 cpu_idx = sc->rrss_map[qset];
1009
1010 cpl->wr.wrh_hi = htobe32(V_WR_OP(FW_WROPCODE_FORWARD));
1011 cpl->wr.wrh_lo = 0;
1012 OPCODE_TID(cpl) = htobe32(MK_OPCODE_TID(CPL_ACT_OPEN_REQ, atid));
1013 inp_4tuple_get(inp, &cpl->local_ip, &cpl->local_port, &cpl->peer_ip,
1014 &cpl->peer_port);
1015 cpl->opt0h = calc_opt0h(so, mtu_idx, rscale, e);
1016 cpl->opt0l = calc_opt0l(so, toep->tp_rx_credits);
1017 cpl->params = 0;
1018 cpl->opt2 = calc_opt2(cpu_idx);
1019
1020 CTR5(KTR_CXGB, "%s: atid %u (%s), toep %p, inp %p", __func__,
1021 toep->tp_tid, tcpstates[tp->t_state], toep, inp);
1022
1023 if (l2t_send(sc, m, e) == 0)
1024 return (0);
1025
1026 undo_offload_socket(so);
1027
1028 failed:
1029 CTR5(KTR_CXGB, "%s: FAILED, atid %d, toep %p, l2te %p, mbuf %p",
1030 __func__, atid, toep, e, m);
1031
1032 if (atid >= 0)
1033 free_atid(&td->tid_maps, atid);
1034
1035 if (e)
1036 l2t_release(td->l2t, e);
1037
1038 if (toep)
1039 toepcb_free(toep);
1040
1041 m_freem(m);
1042
1043 return (ENOMEM);
1044 }
1045
1046 /*
1047 * Send an ABORT_REQ message. Cannot fail. This routine makes sure we do not
1048 * send multiple ABORT_REQs for the same connection and also that we do not try
1049 * to send a message after the connection has closed.
1050 */
1051 static void
send_reset(struct toepcb * toep)1052 send_reset(struct toepcb *toep)
1053 {
1054
1055 struct cpl_abort_req *req;
1056 unsigned int tid = toep->tp_tid;
1057 struct inpcb *inp = toep->tp_inp;
1058 struct socket *so = inp->inp_socket;
1059 struct tcpcb *tp = intotcpcb(inp);
1060 struct toedev *tod = toep->tp_tod;
1061 struct adapter *sc = tod->tod_softc;
1062 struct mbuf *m;
1063
1064 INP_INFO_RLOCK_ASSERT(&V_tcbinfo);
1065 INP_WLOCK_ASSERT(inp);
1066
1067 CTR4(KTR_CXGB, "%s: tid %d, toep %p (%x)", __func__, tid, toep,
1068 toep->tp_flags);
1069
1070 if (toep->tp_flags & TP_ABORT_SHUTDOWN)
1071 return;
1072
1073 toep->tp_flags |= (TP_ABORT_RPL_PENDING | TP_ABORT_SHUTDOWN);
1074
1075 /* Purge the send queue */
1076 sbflush(so_sockbuf_snd(so));
1077 purge_wr_queue(toep);
1078
1079 m = M_GETHDR_OFLD(toep->tp_qset, CPL_PRIORITY_DATA, req);
1080 if (m == NULL)
1081 CXGB_UNIMPLEMENTED();
1082
1083 req->wr.wrh_hi = htonl(V_WR_OP(FW_WROPCODE_OFLD_HOST_ABORT_CON_REQ));
1084 req->wr.wrh_lo = htonl(V_WR_TID(tid));
1085 OPCODE_TID(req) = htonl(MK_OPCODE_TID(CPL_ABORT_REQ, tid));
1086 req->rsvd0 = htonl(tp->snd_nxt);
1087 req->rsvd1 = !(toep->tp_flags & TP_DATASENT);
1088 req->cmd = CPL_ABORT_SEND_RST;
1089
1090 if (tp->t_state == TCPS_SYN_SENT)
1091 (void )mbufq_enqueue(&toep->out_of_order_queue, m); /* defer */
1092 else
1093 l2t_send(sc, m, toep->tp_l2t);
1094 }
1095
1096 int
t3_send_rst(struct toedev * tod __unused,struct tcpcb * tp)1097 t3_send_rst(struct toedev *tod __unused, struct tcpcb *tp)
1098 {
1099
1100 send_reset(tp->t_toe);
1101 return (0);
1102 }
1103
1104 /*
1105 * Handler for RX_DATA CPL messages.
1106 */
1107 static int
do_rx_data(struct sge_qset * qs,struct rsp_desc * r,struct mbuf * m)1108 do_rx_data(struct sge_qset *qs, struct rsp_desc *r, struct mbuf *m)
1109 {
1110 struct adapter *sc = qs->adap;
1111 struct tom_data *td = sc->tom_softc;
1112 struct cpl_rx_data *hdr = mtod(m, void *);
1113 unsigned int tid = GET_TID(hdr);
1114 struct toepcb *toep = lookup_tid(&td->tid_maps, tid);
1115 struct inpcb *inp = toep->tp_inp;
1116 struct tcpcb *tp;
1117 struct socket *so;
1118 struct sockbuf *so_rcv;
1119
1120 /* Advance over CPL */
1121 m_adj(m, sizeof(*hdr));
1122
1123 /* XXX: revisit. This comes from the T4 TOM */
1124 if (__predict_false(inp == NULL)) {
1125 /*
1126 * do_pass_establish failed and must be attempting to abort the
1127 * connection. Meanwhile, the T4 has sent us data for such a
1128 * connection.
1129 */
1130 #ifdef notyet
1131 KASSERT(toepcb_flag(toep, TPF_ABORT_SHUTDOWN),
1132 ("%s: inp NULL and tid isn't being aborted", __func__));
1133 #endif
1134 m_freem(m);
1135 return (0);
1136 }
1137
1138 INP_WLOCK(inp);
1139 if (inp->inp_flags & (INP_DROPPED | INP_TIMEWAIT)) {
1140 CTR4(KTR_CXGB, "%s: tid %u, rx (%d bytes), inp_flags 0x%x",
1141 __func__, tid, m->m_pkthdr.len, inp->inp_flags);
1142 INP_WUNLOCK(inp);
1143 m_freem(m);
1144 return (0);
1145 }
1146
1147 if (__predict_false(hdr->dack_mode != toep->tp_delack_mode))
1148 toep->tp_delack_mode = hdr->dack_mode;
1149
1150 tp = intotcpcb(inp);
1151
1152 #ifdef INVARIANTS
1153 if (__predict_false(tp->rcv_nxt != be32toh(hdr->seq))) {
1154 log(LOG_ERR,
1155 "%s: unexpected seq# %x for TID %u, rcv_nxt %x\n",
1156 __func__, be32toh(hdr->seq), toep->tp_tid, tp->rcv_nxt);
1157 }
1158 #endif
1159 tp->rcv_nxt += m->m_pkthdr.len;
1160 KASSERT(tp->rcv_wnd >= m->m_pkthdr.len,
1161 ("%s: negative window size", __func__));
1162 tp->rcv_wnd -= m->m_pkthdr.len;
1163 tp->t_rcvtime = ticks;
1164
1165 so = inp->inp_socket;
1166 so_rcv = &so->so_rcv;
1167 SOCKBUF_LOCK(so_rcv);
1168
1169 if (__predict_false(so_rcv->sb_state & SBS_CANTRCVMORE)) {
1170 CTR3(KTR_CXGB, "%s: tid %u, excess rx (%d bytes)",
1171 __func__, tid, m->m_pkthdr.len);
1172 SOCKBUF_UNLOCK(so_rcv);
1173 INP_WUNLOCK(inp);
1174
1175 INP_INFO_RLOCK(&V_tcbinfo);
1176 INP_WLOCK(inp);
1177 tp = tcp_drop(tp, ECONNRESET);
1178 if (tp)
1179 INP_WUNLOCK(inp);
1180 INP_INFO_RUNLOCK(&V_tcbinfo);
1181
1182 m_freem(m);
1183 return (0);
1184 }
1185
1186 /* receive buffer autosize */
1187 if (so_rcv->sb_flags & SB_AUTOSIZE &&
1188 V_tcp_do_autorcvbuf &&
1189 so_rcv->sb_hiwat < V_tcp_autorcvbuf_max &&
1190 (m->m_pkthdr.len > (sbspace(so_rcv) / 8 * 7) || tp->rcv_wnd < 32768)) {
1191 unsigned int hiwat = so_rcv->sb_hiwat;
1192 unsigned int newsize = min(hiwat + V_tcp_autorcvbuf_inc,
1193 V_tcp_autorcvbuf_max);
1194
1195 if (!sbreserve_locked(so_rcv, newsize, so, NULL))
1196 so_rcv->sb_flags &= ~SB_AUTOSIZE;
1197 else
1198 toep->tp_rx_credits += newsize - hiwat;
1199 }
1200
1201 toep->tp_enqueued += m->m_pkthdr.len;
1202 sbappendstream_locked(so_rcv, m, 0);
1203 sorwakeup_locked(so);
1204 SOCKBUF_UNLOCK_ASSERT(so_rcv);
1205
1206 INP_WUNLOCK(inp);
1207 return (0);
1208 }
1209
1210 /*
1211 * Handler for PEER_CLOSE CPL messages.
1212 */
1213 static int
do_peer_close(struct sge_qset * qs,struct rsp_desc * r,struct mbuf * m)1214 do_peer_close(struct sge_qset *qs, struct rsp_desc *r, struct mbuf *m)
1215 {
1216 struct adapter *sc = qs->adap;
1217 struct tom_data *td = sc->tom_softc;
1218 const struct cpl_peer_close *hdr = mtod(m, void *);
1219 unsigned int tid = GET_TID(hdr);
1220 struct toepcb *toep = lookup_tid(&td->tid_maps, tid);
1221 struct inpcb *inp = toep->tp_inp;
1222 struct tcpcb *tp;
1223 struct socket *so;
1224
1225 INP_INFO_RLOCK(&V_tcbinfo);
1226 INP_WLOCK(inp);
1227 tp = intotcpcb(inp);
1228
1229 CTR5(KTR_CXGB, "%s: tid %u (%s), toep_flags 0x%x, inp %p", __func__,
1230 tid, tp ? tcpstates[tp->t_state] : "no tp" , toep->tp_flags, inp);
1231
1232 if (toep->tp_flags & TP_ABORT_RPL_PENDING)
1233 goto done;
1234
1235 so = inp_inpcbtosocket(inp);
1236
1237 socantrcvmore(so);
1238 tp->rcv_nxt++;
1239
1240 switch (tp->t_state) {
1241 case TCPS_SYN_RECEIVED:
1242 tp->t_starttime = ticks;
1243 /* FALLTHROUGH */
1244 case TCPS_ESTABLISHED:
1245 tp->t_state = TCPS_CLOSE_WAIT;
1246 break;
1247 case TCPS_FIN_WAIT_1:
1248 tp->t_state = TCPS_CLOSING;
1249 break;
1250 case TCPS_FIN_WAIT_2:
1251 tcp_twstart(tp);
1252 INP_UNLOCK_ASSERT(inp); /* safe, we have a ref on the inp */
1253 INP_INFO_RUNLOCK(&V_tcbinfo);
1254
1255 INP_WLOCK(inp);
1256 toepcb_release(toep); /* no more CPLs expected */
1257
1258 m_freem(m);
1259 return (0);
1260 default:
1261 log(LOG_ERR, "%s: TID %u received PEER_CLOSE in bad state %d\n",
1262 __func__, toep->tp_tid, tp->t_state);
1263 }
1264
1265 done:
1266 INP_WUNLOCK(inp);
1267 INP_INFO_RUNLOCK(&V_tcbinfo);
1268
1269 m_freem(m);
1270 return (0);
1271 }
1272
1273 /*
1274 * Handler for CLOSE_CON_RPL CPL messages. peer ACK to our FIN received.
1275 */
1276 static int
do_close_con_rpl(struct sge_qset * qs,struct rsp_desc * r,struct mbuf * m)1277 do_close_con_rpl(struct sge_qset *qs, struct rsp_desc *r, struct mbuf *m)
1278 {
1279 struct adapter *sc = qs->adap;
1280 struct tom_data *td = sc->tom_softc;
1281 const struct cpl_close_con_rpl *rpl = mtod(m, void *);
1282 unsigned int tid = GET_TID(rpl);
1283 struct toepcb *toep = lookup_tid(&td->tid_maps, tid);
1284 struct inpcb *inp = toep->tp_inp;
1285 struct tcpcb *tp;
1286 struct socket *so;
1287
1288 INP_INFO_RLOCK(&V_tcbinfo);
1289 INP_WLOCK(inp);
1290 tp = intotcpcb(inp);
1291
1292 CTR4(KTR_CXGB, "%s: tid %u (%s), toep_flags 0x%x", __func__, tid,
1293 tp ? tcpstates[tp->t_state] : "no tp", toep->tp_flags);
1294
1295 if ((toep->tp_flags & TP_ABORT_RPL_PENDING))
1296 goto done;
1297
1298 so = inp_inpcbtosocket(inp);
1299 tp->snd_una = ntohl(rpl->snd_nxt) - 1; /* exclude FIN */
1300
1301 switch (tp->t_state) {
1302 case TCPS_CLOSING:
1303 tcp_twstart(tp);
1304 release:
1305 INP_UNLOCK_ASSERT(inp); /* safe, we have a ref on the inp */
1306 INP_INFO_RUNLOCK(&V_tcbinfo);
1307
1308 INP_WLOCK(inp);
1309 toepcb_release(toep); /* no more CPLs expected */
1310
1311 m_freem(m);
1312 return (0);
1313 case TCPS_LAST_ACK:
1314 if (tcp_close(tp))
1315 INP_WUNLOCK(inp);
1316 goto release;
1317
1318 case TCPS_FIN_WAIT_1:
1319 if (so->so_rcv.sb_state & SBS_CANTRCVMORE)
1320 soisdisconnected(so);
1321 tp->t_state = TCPS_FIN_WAIT_2;
1322 break;
1323 default:
1324 log(LOG_ERR,
1325 "%s: TID %u received CLOSE_CON_RPL in bad state %d\n",
1326 __func__, toep->tp_tid, tp->t_state);
1327 }
1328
1329 done:
1330 INP_WUNLOCK(inp);
1331 INP_INFO_RUNLOCK(&V_tcbinfo);
1332
1333 m_freem(m);
1334 return (0);
1335 }
1336
1337 static int
do_smt_write_rpl(struct sge_qset * qs,struct rsp_desc * r,struct mbuf * m)1338 do_smt_write_rpl(struct sge_qset *qs, struct rsp_desc *r, struct mbuf *m)
1339 {
1340 struct cpl_smt_write_rpl *rpl = mtod(m, void *);
1341
1342 if (rpl->status != CPL_ERR_NONE) {
1343 log(LOG_ERR,
1344 "Unexpected SMT_WRITE_RPL status %u for entry %u\n",
1345 rpl->status, GET_TID(rpl));
1346 }
1347
1348 m_freem(m);
1349 return (0);
1350 }
1351
1352 static int
do_set_tcb_rpl(struct sge_qset * qs,struct rsp_desc * r,struct mbuf * m)1353 do_set_tcb_rpl(struct sge_qset *qs, struct rsp_desc *r, struct mbuf *m)
1354 {
1355 struct cpl_set_tcb_rpl *rpl = mtod(m, void *);
1356
1357 if (rpl->status != CPL_ERR_NONE) {
1358 log(LOG_ERR, "Unexpected SET_TCB_RPL status %u for tid %u\n",
1359 rpl->status, GET_TID(rpl));
1360 }
1361
1362 m_freem(m);
1363 return (0);
1364 }
1365
1366 /*
1367 * Handle an ABORT_RPL_RSS CPL message.
1368 */
1369 static int
do_abort_rpl(struct sge_qset * qs,struct rsp_desc * r,struct mbuf * m)1370 do_abort_rpl(struct sge_qset *qs, struct rsp_desc *r, struct mbuf *m)
1371 {
1372 struct adapter *sc = qs->adap;
1373 struct tom_data *td = sc->tom_softc;
1374 const struct cpl_abort_rpl_rss *rpl = mtod(m, void *);
1375 unsigned int tid = GET_TID(rpl);
1376 struct toepcb *toep = lookup_tid(&td->tid_maps, tid);
1377 struct inpcb *inp;
1378
1379 /*
1380 * Ignore replies to post-close aborts indicating that the abort was
1381 * requested too late. These connections are terminated when we get
1382 * PEER_CLOSE or CLOSE_CON_RPL and by the time the abort_rpl_rss
1383 * arrives the TID is either no longer used or it has been recycled.
1384 */
1385 if (rpl->status == CPL_ERR_ABORT_FAILED) {
1386 m_freem(m);
1387 return (0);
1388 }
1389
1390 if (toep->tp_flags & TP_IS_A_SYNQ_ENTRY)
1391 return (do_abort_rpl_synqe(qs, r, m));
1392
1393 CTR4(KTR_CXGB, "%s: tid %d, toep %p, status %d", __func__, tid, toep,
1394 rpl->status);
1395
1396 inp = toep->tp_inp;
1397 INP_WLOCK(inp);
1398
1399 if (toep->tp_flags & TP_ABORT_RPL_PENDING) {
1400 if (!(toep->tp_flags & TP_ABORT_RPL_RCVD)) {
1401 toep->tp_flags |= TP_ABORT_RPL_RCVD;
1402 INP_WUNLOCK(inp);
1403 } else {
1404 toep->tp_flags &= ~TP_ABORT_RPL_RCVD;
1405 toep->tp_flags &= TP_ABORT_RPL_PENDING;
1406 toepcb_release(toep); /* no more CPLs expected */
1407 }
1408 }
1409
1410 m_freem(m);
1411 return (0);
1412 }
1413
1414 /*
1415 * Convert the status code of an ABORT_REQ into a FreeBSD error code.
1416 */
1417 static int
abort_status_to_errno(struct tcpcb * tp,int abort_reason)1418 abort_status_to_errno(struct tcpcb *tp, int abort_reason)
1419 {
1420 switch (abort_reason) {
1421 case CPL_ERR_BAD_SYN:
1422 case CPL_ERR_CONN_RESET:
1423 return (tp->t_state == TCPS_CLOSE_WAIT ? EPIPE : ECONNRESET);
1424 case CPL_ERR_XMIT_TIMEDOUT:
1425 case CPL_ERR_PERSIST_TIMEDOUT:
1426 case CPL_ERR_FINWAIT2_TIMEDOUT:
1427 case CPL_ERR_KEEPALIVE_TIMEDOUT:
1428 return (ETIMEDOUT);
1429 default:
1430 return (EIO);
1431 }
1432 }
1433
1434 /*
1435 * Returns whether an ABORT_REQ_RSS message is a negative advice.
1436 */
1437 static inline int
is_neg_adv_abort(unsigned int status)1438 is_neg_adv_abort(unsigned int status)
1439 {
1440 return status == CPL_ERR_RTX_NEG_ADVICE ||
1441 status == CPL_ERR_PERSIST_NEG_ADVICE;
1442 }
1443
1444 void
send_abort_rpl(struct toedev * tod,int tid,int qset)1445 send_abort_rpl(struct toedev *tod, int tid, int qset)
1446 {
1447 struct mbuf *reply;
1448 struct cpl_abort_rpl *rpl;
1449 struct adapter *sc = tod->tod_softc;
1450
1451 reply = M_GETHDR_OFLD(qset, CPL_PRIORITY_DATA, rpl);
1452 if (!reply)
1453 CXGB_UNIMPLEMENTED();
1454
1455 rpl->wr.wrh_hi = htonl(V_WR_OP(FW_WROPCODE_OFLD_HOST_ABORT_CON_RPL));
1456 rpl->wr.wrh_lo = htonl(V_WR_TID(tid));
1457 OPCODE_TID(rpl) = htonl(MK_OPCODE_TID(CPL_ABORT_RPL, tid));
1458 rpl->cmd = CPL_ABORT_NO_RST;
1459
1460 t3_offload_tx(sc, reply);
1461 }
1462
1463 /*
1464 * Handle an ABORT_REQ_RSS CPL message. If we're waiting for an ABORT_RPL we
1465 * ignore this request except that we need to reply to it.
1466 */
1467 static int
do_abort_req(struct sge_qset * qs,struct rsp_desc * r,struct mbuf * m)1468 do_abort_req(struct sge_qset *qs, struct rsp_desc *r, struct mbuf *m)
1469 {
1470 struct adapter *sc = qs->adap;
1471 struct tom_data *td = sc->tom_softc;
1472 struct toedev *tod = &td->tod;
1473 const struct cpl_abort_req_rss *req = mtod(m, void *);
1474 unsigned int tid = GET_TID(req);
1475 struct toepcb *toep = lookup_tid(&td->tid_maps, tid);
1476 struct inpcb *inp;
1477 struct tcpcb *tp;
1478 struct socket *so;
1479 int qset = toep->tp_qset;
1480
1481 if (is_neg_adv_abort(req->status)) {
1482 CTR4(KTR_CXGB, "%s: negative advice %d for tid %u (%x)",
1483 __func__, req->status, tid, toep->tp_flags);
1484 m_freem(m);
1485 return (0);
1486 }
1487
1488 if (toep->tp_flags & TP_IS_A_SYNQ_ENTRY)
1489 return (do_abort_req_synqe(qs, r, m));
1490
1491 inp = toep->tp_inp;
1492 INP_INFO_RLOCK(&V_tcbinfo); /* for tcp_close */
1493 INP_WLOCK(inp);
1494
1495 tp = intotcpcb(inp);
1496 so = inp->inp_socket;
1497
1498 CTR6(KTR_CXGB, "%s: tid %u (%s), toep %p (%x), status %d",
1499 __func__, tid, tcpstates[tp->t_state], toep, toep->tp_flags,
1500 req->status);
1501
1502 if (!(toep->tp_flags & TP_ABORT_REQ_RCVD)) {
1503 toep->tp_flags |= TP_ABORT_REQ_RCVD;
1504 toep->tp_flags |= TP_ABORT_SHUTDOWN;
1505 INP_WUNLOCK(inp);
1506 INP_INFO_RUNLOCK(&V_tcbinfo);
1507 m_freem(m);
1508 return (0);
1509 }
1510 toep->tp_flags &= ~TP_ABORT_REQ_RCVD;
1511
1512 /*
1513 * If we'd sent a reset on this toep, we'll ignore this and clean up in
1514 * the T3's reply to our reset instead.
1515 */
1516 if (toep->tp_flags & TP_ABORT_RPL_PENDING) {
1517 toep->tp_flags |= TP_ABORT_RPL_SENT;
1518 INP_WUNLOCK(inp);
1519 } else {
1520 so_error_set(so, abort_status_to_errno(tp, req->status));
1521 tp = tcp_close(tp);
1522 if (tp == NULL)
1523 INP_WLOCK(inp); /* re-acquire */
1524 toepcb_release(toep); /* no more CPLs expected */
1525 }
1526 INP_INFO_RUNLOCK(&V_tcbinfo);
1527
1528 send_abort_rpl(tod, tid, qset);
1529 m_freem(m);
1530 return (0);
1531 }
1532
1533 static void
assign_rxopt(struct tcpcb * tp,uint16_t tcpopt)1534 assign_rxopt(struct tcpcb *tp, uint16_t tcpopt)
1535 {
1536 struct toepcb *toep = tp->t_toe;
1537 struct adapter *sc = toep->tp_tod->tod_softc;
1538
1539 tp->t_maxseg = sc->params.mtus[G_TCPOPT_MSS(tcpopt)] - 40;
1540
1541 if (G_TCPOPT_TSTAMP(tcpopt)) {
1542 tp->t_flags |= TF_RCVD_TSTMP;
1543 tp->t_flags |= TF_REQ_TSTMP; /* forcibly set */
1544 tp->ts_recent = 0; /* XXX */
1545 tp->ts_recent_age = tcp_ts_getticks();
1546 }
1547
1548 if (G_TCPOPT_SACK(tcpopt))
1549 tp->t_flags |= TF_SACK_PERMIT;
1550 else
1551 tp->t_flags &= ~TF_SACK_PERMIT;
1552
1553 if (G_TCPOPT_WSCALE_OK(tcpopt))
1554 tp->t_flags |= TF_RCVD_SCALE;
1555
1556 if ((tp->t_flags & (TF_RCVD_SCALE | TF_REQ_SCALE)) ==
1557 (TF_RCVD_SCALE | TF_REQ_SCALE)) {
1558 tp->rcv_scale = tp->request_r_scale;
1559 tp->snd_scale = G_TCPOPT_SND_WSCALE(tcpopt);
1560 }
1561
1562 }
1563
1564 /*
1565 * The ISS and IRS are from after the exchange of SYNs and are off by 1.
1566 */
1567 void
make_established(struct socket * so,uint32_t cpl_iss,uint32_t cpl_irs,uint16_t cpl_tcpopt)1568 make_established(struct socket *so, uint32_t cpl_iss, uint32_t cpl_irs,
1569 uint16_t cpl_tcpopt)
1570 {
1571 struct inpcb *inp = sotoinpcb(so);
1572 struct tcpcb *tp = intotcpcb(inp);
1573 struct toepcb *toep = tp->t_toe;
1574 long bufsize;
1575 uint32_t iss = be32toh(cpl_iss) - 1; /* true ISS */
1576 uint32_t irs = be32toh(cpl_irs) - 1; /* true IRS */
1577 uint16_t tcpopt = be16toh(cpl_tcpopt);
1578
1579 INP_WLOCK_ASSERT(inp);
1580
1581 tp->t_state = TCPS_ESTABLISHED;
1582 tp->t_starttime = ticks;
1583 TCPSTAT_INC(tcps_connects);
1584
1585 CTR4(KTR_CXGB, "%s tid %u, toep %p, inp %p", tcpstates[tp->t_state],
1586 toep->tp_tid, toep, inp);
1587
1588 tp->irs = irs;
1589 tcp_rcvseqinit(tp);
1590 tp->rcv_wnd = toep->tp_rx_credits << 10;
1591 tp->rcv_adv += tp->rcv_wnd;
1592 tp->last_ack_sent = tp->rcv_nxt;
1593
1594 /*
1595 * If we were unable to send all rx credits via opt0, save the remainder
1596 * in rx_credits so that they can be handed over with the next credit
1597 * update.
1598 */
1599 SOCKBUF_LOCK(&so->so_rcv);
1600 bufsize = select_rcv_wnd(so);
1601 SOCKBUF_UNLOCK(&so->so_rcv);
1602 toep->tp_rx_credits = bufsize - tp->rcv_wnd;
1603
1604 tp->iss = iss;
1605 tcp_sendseqinit(tp);
1606 tp->snd_una = iss + 1;
1607 tp->snd_nxt = iss + 1;
1608 tp->snd_max = iss + 1;
1609
1610 assign_rxopt(tp, tcpopt);
1611 soisconnected(so);
1612 }
1613
1614 /*
1615 * Fill in the right TID for CPL messages waiting in the out-of-order queue
1616 * and send them to the TOE.
1617 */
1618 static void
fixup_and_send_ofo(struct toepcb * toep)1619 fixup_and_send_ofo(struct toepcb *toep)
1620 {
1621 struct mbuf *m;
1622 struct toedev *tod = toep->tp_tod;
1623 struct adapter *sc = tod->tod_softc;
1624 struct inpcb *inp = toep->tp_inp;
1625 unsigned int tid = toep->tp_tid;
1626
1627 inp_lock_assert(inp);
1628
1629 while ((m = mbufq_dequeue(&toep->out_of_order_queue)) != NULL) {
1630 struct ofld_hdr *oh = mtod(m, void *);
1631 /*
1632 * A variety of messages can be waiting but the fields we'll
1633 * be touching are common to all so any message type will do.
1634 */
1635 struct cpl_close_con_req *p = (void *)(oh + 1);
1636
1637 p->wr.wrh_lo = htonl(V_WR_TID(tid));
1638 OPCODE_TID(p) = htonl(MK_OPCODE_TID(p->ot.opcode, tid));
1639 t3_offload_tx(sc, m);
1640 }
1641 }
1642
1643 /*
1644 * Process a CPL_ACT_ESTABLISH message.
1645 */
1646 static int
do_act_establish(struct sge_qset * qs,struct rsp_desc * r,struct mbuf * m)1647 do_act_establish(struct sge_qset *qs, struct rsp_desc *r, struct mbuf *m)
1648 {
1649 struct adapter *sc = qs->adap;
1650 struct tom_data *td = sc->tom_softc;
1651 struct cpl_act_establish *req = mtod(m, void *);
1652 unsigned int tid = GET_TID(req);
1653 unsigned int atid = G_PASS_OPEN_TID(ntohl(req->tos_tid));
1654 struct toepcb *toep = lookup_atid(&td->tid_maps, atid);
1655 struct inpcb *inp = toep->tp_inp;
1656 struct tcpcb *tp;
1657 struct socket *so;
1658
1659 CTR3(KTR_CXGB, "%s: atid %u, tid %u", __func__, atid, tid);
1660
1661 free_atid(&td->tid_maps, atid);
1662
1663 INP_WLOCK(inp);
1664 tp = intotcpcb(inp);
1665
1666 KASSERT(toep->tp_qset == qs->idx,
1667 ("%s qset mismatch %d %d", __func__, toep->tp_qset, qs->idx));
1668 KASSERT(toep->tp_tid == atid,
1669 ("%s atid mismatch %d %d", __func__, toep->tp_tid, atid));
1670
1671 toep->tp_tid = tid;
1672 insert_tid(td, toep, tid);
1673
1674 if (inp->inp_flags & INP_DROPPED) {
1675 /* socket closed by the kernel before hw told us it connected */
1676 send_reset(toep);
1677 goto done;
1678 }
1679
1680 KASSERT(tp->t_state == TCPS_SYN_SENT,
1681 ("TID %u expected TCPS_SYN_SENT, found %d.", tid, tp->t_state));
1682
1683 so = inp->inp_socket;
1684 make_established(so, req->snd_isn, req->rcv_isn, req->tcp_opt);
1685
1686 /*
1687 * Now that we finally have a TID send any CPL messages that we had to
1688 * defer for lack of a TID.
1689 */
1690 if (mbufq_len(&toep->out_of_order_queue))
1691 fixup_and_send_ofo(toep);
1692
1693 done:
1694 INP_WUNLOCK(inp);
1695 m_freem(m);
1696 return (0);
1697 }
1698
1699 /*
1700 * Process an acknowledgment of WR completion. Advance snd_una and send the
1701 * next batch of work requests from the write queue.
1702 */
1703 static void
wr_ack(struct toepcb * toep,struct mbuf * m)1704 wr_ack(struct toepcb *toep, struct mbuf *m)
1705 {
1706 struct inpcb *inp = toep->tp_inp;
1707 struct tcpcb *tp;
1708 struct cpl_wr_ack *hdr = mtod(m, void *);
1709 struct socket *so;
1710 unsigned int credits = ntohs(hdr->credits);
1711 u32 snd_una = ntohl(hdr->snd_una);
1712 int bytes = 0;
1713 struct sockbuf *snd;
1714 struct mbuf *p;
1715 struct ofld_hdr *oh;
1716
1717 inp_wlock(inp);
1718 tp = intotcpcb(inp);
1719 so = inp->inp_socket;
1720 toep->tp_wr_avail += credits;
1721 if (toep->tp_wr_unacked > toep->tp_wr_max - toep->tp_wr_avail)
1722 toep->tp_wr_unacked = toep->tp_wr_max - toep->tp_wr_avail;
1723
1724 while (credits) {
1725 p = peek_wr(toep);
1726
1727 if (__predict_false(!p)) {
1728 CTR5(KTR_CXGB, "%s: %u extra WR_ACK credits, "
1729 "tid %u, state %u, wr_avail %u", __func__, credits,
1730 toep->tp_tid, tp->t_state, toep->tp_wr_avail);
1731
1732 log(LOG_ERR, "%u WR_ACK credits for TID %u with "
1733 "nothing pending, state %u wr_avail=%u\n",
1734 credits, toep->tp_tid, tp->t_state, toep->tp_wr_avail);
1735 break;
1736 }
1737
1738 oh = mtod(p, struct ofld_hdr *);
1739
1740 KASSERT(credits >= G_HDR_NDESC(oh->flags),
1741 ("%s: partial credits? %d %d", __func__, credits,
1742 G_HDR_NDESC(oh->flags)));
1743
1744 dequeue_wr(toep);
1745 credits -= G_HDR_NDESC(oh->flags);
1746 bytes += oh->plen;
1747
1748 if (oh->flags & F_HDR_SGL)
1749 sglist_free(oh->sgl);
1750 m_freem(p);
1751 }
1752
1753 if (__predict_false(SEQ_LT(snd_una, tp->snd_una)))
1754 goto out_free;
1755
1756 if (tp->snd_una != snd_una) {
1757 tp->snd_una = snd_una;
1758 tp->ts_recent_age = tcp_ts_getticks();
1759 if (tp->snd_una == tp->snd_nxt)
1760 toep->tp_flags &= ~TP_TX_WAIT_IDLE;
1761 }
1762
1763 snd = so_sockbuf_snd(so);
1764 if (bytes) {
1765 SOCKBUF_LOCK(snd);
1766 sbdrop_locked(snd, bytes);
1767 so_sowwakeup_locked(so);
1768 }
1769
1770 if (snd->sb_sndptroff < sbused(snd))
1771 t3_push_frames(so, 0);
1772
1773 out_free:
1774 inp_wunlock(tp->t_inpcb);
1775 m_freem(m);
1776 }
1777
1778 /*
1779 * Handler for TX_DATA_ACK CPL messages.
1780 */
1781 static int
do_wr_ack(struct sge_qset * qs,struct rsp_desc * r,struct mbuf * m)1782 do_wr_ack(struct sge_qset *qs, struct rsp_desc *r, struct mbuf *m)
1783 {
1784 struct adapter *sc = qs->adap;
1785 struct tom_data *td = sc->tom_softc;
1786 struct cpl_wr_ack *hdr = mtod(m, void *);
1787 unsigned int tid = GET_TID(hdr);
1788 struct toepcb *toep = lookup_tid(&td->tid_maps, tid);
1789
1790 /* XXX bad race */
1791 if (toep)
1792 wr_ack(toep, m);
1793
1794 return (0);
1795 }
1796
1797 void
t3_init_cpl_io(struct adapter * sc)1798 t3_init_cpl_io(struct adapter *sc)
1799 {
1800 t3_register_cpl_handler(sc, CPL_ACT_ESTABLISH, do_act_establish);
1801 t3_register_cpl_handler(sc, CPL_ACT_OPEN_RPL, do_act_open_rpl);
1802 t3_register_cpl_handler(sc, CPL_RX_URG_NOTIFY, do_rx_urg_notify);
1803 t3_register_cpl_handler(sc, CPL_RX_DATA, do_rx_data);
1804 t3_register_cpl_handler(sc, CPL_TX_DMA_ACK, do_wr_ack);
1805 t3_register_cpl_handler(sc, CPL_PEER_CLOSE, do_peer_close);
1806 t3_register_cpl_handler(sc, CPL_ABORT_REQ_RSS, do_abort_req);
1807 t3_register_cpl_handler(sc, CPL_ABORT_RPL_RSS, do_abort_rpl);
1808 t3_register_cpl_handler(sc, CPL_CLOSE_CON_RPL, do_close_con_rpl);
1809 t3_register_cpl_handler(sc, CPL_SMT_WRITE_RPL, do_smt_write_rpl);
1810 t3_register_cpl_handler(sc, CPL_SET_TCB_RPL, do_set_tcb_rpl);
1811 }
1812 #endif
1813