1 /* -*- mode: c; c-basic-offset: 8; indent-tabs-mode: nil; -*-
2 * vim:expandtab:shiftwidth=8:tabstop=8:
4 * Copyright (C) 2002 Cluster File Systems, Inc.
5 * Author: Eric Barton <eric@bartonsoftware.com>
7 * Copyright (C) 2002, Lawrence Livermore National Labs (LLNL)
8 * W. Marcus Miller - Based on ksocknal
10 * This file is part of Portals, http://www.sf.net/projects/sandiaportals/
12 * Portals is free software; you can redistribute it and/or
13 * modify it under the terms of version 2 of the GNU General Public
14 * License as published by the Free Software Foundation.
16 * Portals is distributed in the hope that it will be useful,
17 * but WITHOUT ANY WARRANTY; without even the implied warranty of
18 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
19 * GNU General Public License for more details.
21 * You should have received a copy of the GNU General Public License
22 * along with Portals; if not, write to the Free Software
23 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
29 atomic_t kqswnal_packets_launched;
30 atomic_t kqswnal_packets_transmitted;
31 atomic_t kqswnal_packets_received;
35 * LIB functions follow
39 kqswnal_read(nal_cb_t *nal, void *private, void *dst_addr, user_ptr src_addr,
42 CDEBUG (D_NET, LPX64": reading "LPSZ" bytes from %p -> %p\n",
43 nal->ni.nid, len, src_addr, dst_addr );
44 memcpy( dst_addr, src_addr, len );
50 kqswnal_write(nal_cb_t *nal, void *private, user_ptr dst_addr, void *src_addr,
53 CDEBUG (D_NET, LPX64": writing "LPSZ" bytes from %p -> %p\n",
54 nal->ni.nid, len, src_addr, dst_addr );
55 memcpy( dst_addr, src_addr, len );
61 kqswnal_malloc(nal_cb_t *nal, size_t len)
65 PORTAL_ALLOC(buf, len);
70 kqswnal_free(nal_cb_t *nal, void *buf, size_t len)
72 PORTAL_FREE(buf, len);
76 kqswnal_printf (nal_cb_t * nal, const char *fmt, ...)
82 vsnprintf (msg, sizeof (msg), fmt, ap); /* sprint safely */
85 msg[sizeof (msg) - 1] = 0; /* ensure terminated */
87 CDEBUG (D_NET, "%s", msg);
92 kqswnal_cli(nal_cb_t *nal, unsigned long *flags)
94 kqswnal_data_t *data= nal->nal_data;
96 spin_lock_irqsave(&data->kqn_statelock, *flags);
101 kqswnal_sti(nal_cb_t *nal, unsigned long *flags)
103 kqswnal_data_t *data= nal->nal_data;
105 spin_unlock_irqrestore(&data->kqn_statelock, *flags);
110 kqswnal_dist(nal_cb_t *nal, ptl_nid_t nid, unsigned long *dist)
112 if (nid == nal->ni.nid)
113 *dist = 0; /* it's me */
114 else if (kqswnal_nid2elanid (nid) >= 0)
115 *dist = 1; /* it's my peer */
117 *dist = 2; /* via router */
122 kqswnal_notify_peer_down(kqswnal_tx_t *ktx)
127 do_gettimeofday (&now);
128 then = now.tv_sec - (jiffies - ktx->ktx_launchtime)/HZ;
130 kpr_notify(&kqswnal_data.kqn_router, ktx->ktx_nid, 0, then);
134 kqswnal_unmap_tx (kqswnal_tx_t *ktx)
136 if (ktx->ktx_nmappedpages == 0)
139 CDEBUG (D_NET, "%p[%d] unloading pages %d for %d\n",
140 ktx, ktx->ktx_niov, ktx->ktx_basepage, ktx->ktx_nmappedpages);
142 LASSERT (ktx->ktx_nmappedpages <= ktx->ktx_npages);
143 LASSERT (ktx->ktx_basepage + ktx->ktx_nmappedpages <=
144 kqswnal_data.kqn_eptxdmahandle->NumDvmaPages);
146 elan3_dvma_unload(kqswnal_data.kqn_epdev->DmaState,
147 kqswnal_data.kqn_eptxdmahandle,
148 ktx->ktx_basepage, ktx->ktx_nmappedpages);
149 ktx->ktx_nmappedpages = 0;
153 kqswnal_map_tx_kiov (kqswnal_tx_t *ktx, int nob, int niov, ptl_kiov_t *kiov)
155 int nfrags = ktx->ktx_niov;
156 const int maxfrags = sizeof (ktx->ktx_iov)/sizeof (ktx->ktx_iov[0]);
157 int nmapped = ktx->ktx_nmappedpages;
158 int maxmapped = ktx->ktx_npages;
159 uint32_t basepage = ktx->ktx_basepage + nmapped;
162 LASSERT (nmapped <= maxmapped);
163 LASSERT (nfrags <= maxfrags);
168 int fraglen = kiov->kiov_len;
170 /* nob exactly spans the iovs */
171 LASSERT (fraglen <= nob);
172 /* each frag fits in a page */
173 LASSERT (kiov->kiov_offset + kiov->kiov_len <= PAGE_SIZE);
176 if (nmapped > maxmapped) {
177 CERROR("Can't map message in %d pages (max %d)\n",
182 if (nfrags == maxfrags) {
183 CERROR("Message too fragmented in Elan VM (max %d frags)\n",
188 /* XXX this is really crap, but we'll have to kmap until
189 * EKC has a page (rather than vaddr) mapping interface */
191 ptr = ((char *)kmap (kiov->kiov_page)) + kiov->kiov_offset;
194 "%p[%d] loading %p for %d, page %d, %d total\n",
195 ktx, nfrags, ptr, fraglen, basepage, nmapped);
197 elan3_dvma_kaddr_load (kqswnal_data.kqn_epdev->DmaState,
198 kqswnal_data.kqn_eptxdmahandle,
200 basepage, &ktx->ktx_iov[nfrags].Base);
202 kunmap (kiov->kiov_page);
204 /* keep in loop for failure case */
205 ktx->ktx_nmappedpages = nmapped;
207 if (nfrags > 0 && /* previous frag mapped */
208 ktx->ktx_iov[nfrags].Base == /* contiguous with this one */
209 (ktx->ktx_iov[nfrags-1].Base + ktx->ktx_iov[nfrags-1].Len))
210 /* just extend previous */
211 ktx->ktx_iov[nfrags - 1].Len += fraglen;
213 ktx->ktx_iov[nfrags].Len = fraglen;
214 nfrags++; /* new frag */
222 /* iov must not run out before end of data */
223 LASSERT (nob == 0 || niov > 0);
227 ktx->ktx_niov = nfrags;
228 CDEBUG (D_NET, "%p got %d frags over %d pages\n",
229 ktx, ktx->ktx_niov, ktx->ktx_nmappedpages);
235 kqswnal_map_tx_iov (kqswnal_tx_t *ktx, int nob, int niov, struct iovec *iov)
237 int nfrags = ktx->ktx_niov;
238 const int maxfrags = sizeof (ktx->ktx_iov)/sizeof (ktx->ktx_iov[0]);
239 int nmapped = ktx->ktx_nmappedpages;
240 int maxmapped = ktx->ktx_npages;
241 uint32_t basepage = ktx->ktx_basepage + nmapped;
243 LASSERT (nmapped <= maxmapped);
244 LASSERT (nfrags <= maxfrags);
249 int fraglen = iov->iov_len;
250 long npages = kqswnal_pages_spanned (iov->iov_base, fraglen);
252 /* nob exactly spans the iovs */
253 LASSERT (fraglen <= nob);
256 if (nmapped > maxmapped) {
257 CERROR("Can't map message in %d pages (max %d)\n",
262 if (nfrags == maxfrags) {
263 CERROR("Message too fragmented in Elan VM (max %d frags)\n",
269 "%p[%d] loading %p for %d, pages %d for %ld, %d total\n",
270 ktx, nfrags, iov->iov_base, fraglen, basepage, npages,
273 elan3_dvma_kaddr_load (kqswnal_data.kqn_epdev->DmaState,
274 kqswnal_data.kqn_eptxdmahandle,
275 iov->iov_base, fraglen,
276 basepage, &ktx->ktx_iov[nfrags].Base);
277 /* keep in loop for failure case */
278 ktx->ktx_nmappedpages = nmapped;
280 if (nfrags > 0 && /* previous frag mapped */
281 ktx->ktx_iov[nfrags].Base == /* contiguous with this one */
282 (ktx->ktx_iov[nfrags-1].Base + ktx->ktx_iov[nfrags-1].Len))
283 /* just extend previous */
284 ktx->ktx_iov[nfrags - 1].Len += fraglen;
286 ktx->ktx_iov[nfrags].Len = fraglen;
287 nfrags++; /* new frag */
295 /* iov must not run out before end of data */
296 LASSERT (nob == 0 || niov > 0);
300 ktx->ktx_niov = nfrags;
301 CDEBUG (D_NET, "%p got %d frags over %d pages\n",
302 ktx, ktx->ktx_niov, ktx->ktx_nmappedpages);
308 kqswnal_put_idle_tx (kqswnal_tx_t *ktx)
310 kpr_fwd_desc_t *fwd = NULL;
313 kqswnal_unmap_tx (ktx); /* release temporary mappings */
315 spin_lock_irqsave (&kqswnal_data.kqn_idletxd_lock, flags);
317 list_del (&ktx->ktx_list); /* take off active list */
319 if (ktx->ktx_isnblk) {
320 /* reserved for non-blocking tx */
321 list_add (&ktx->ktx_list, &kqswnal_data.kqn_nblk_idletxds);
322 spin_unlock_irqrestore (&kqswnal_data.kqn_idletxd_lock, flags);
326 list_add (&ktx->ktx_list, &kqswnal_data.kqn_idletxds);
328 /* anything blocking for a tx descriptor? */
329 if (!list_empty(&kqswnal_data.kqn_idletxd_fwdq)) /* forwarded packet? */
331 CDEBUG(D_NET,"wakeup fwd\n");
333 fwd = list_entry (kqswnal_data.kqn_idletxd_fwdq.next,
334 kpr_fwd_desc_t, kprfd_list);
335 list_del (&fwd->kprfd_list);
338 if (waitqueue_active (&kqswnal_data.kqn_idletxd_waitq)) /* process? */
340 /* local sender waiting for tx desc */
341 CDEBUG(D_NET,"wakeup process\n");
342 wake_up (&kqswnal_data.kqn_idletxd_waitq);
345 spin_unlock_irqrestore (&kqswnal_data.kqn_idletxd_lock, flags);
350 /* schedule packet for forwarding again */
351 spin_lock_irqsave (&kqswnal_data.kqn_sched_lock, flags);
353 list_add_tail (&fwd->kprfd_list, &kqswnal_data.kqn_delayedfwds);
354 if (waitqueue_active (&kqswnal_data.kqn_sched_waitq))
355 wake_up (&kqswnal_data.kqn_sched_waitq);
357 spin_unlock_irqrestore (&kqswnal_data.kqn_sched_lock, flags);
361 kqswnal_get_idle_tx (kpr_fwd_desc_t *fwd, int may_block)
364 kqswnal_tx_t *ktx = NULL;
367 spin_lock_irqsave (&kqswnal_data.kqn_idletxd_lock, flags);
369 /* "normal" descriptor is free */
370 if (!list_empty (&kqswnal_data.kqn_idletxds)) {
371 ktx = list_entry (kqswnal_data.kqn_idletxds.next,
372 kqswnal_tx_t, ktx_list);
376 /* "normal" descriptor pool is empty */
378 if (fwd != NULL) { /* forwarded packet => queue for idle txd */
379 CDEBUG (D_NET, "blocked fwd [%p]\n", fwd);
380 list_add_tail (&fwd->kprfd_list,
381 &kqswnal_data.kqn_idletxd_fwdq);
385 /* doing a local transmit */
387 if (list_empty (&kqswnal_data.kqn_nblk_idletxds)) {
388 CERROR ("intr tx desc pool exhausted\n");
392 ktx = list_entry (kqswnal_data.kqn_nblk_idletxds.next,
393 kqswnal_tx_t, ktx_list);
397 /* block for idle tx */
399 spin_unlock_irqrestore (&kqswnal_data.kqn_idletxd_lock, flags);
401 CDEBUG (D_NET, "blocking for tx desc\n");
402 wait_event (kqswnal_data.kqn_idletxd_waitq,
403 !list_empty (&kqswnal_data.kqn_idletxds));
407 list_del (&ktx->ktx_list);
408 list_add (&ktx->ktx_list, &kqswnal_data.kqn_activetxds);
409 ktx->ktx_launcher = current->pid;
412 spin_unlock_irqrestore (&kqswnal_data.kqn_idletxd_lock, flags);
414 /* Idle descs can't have any mapped (as opposed to pre-mapped) pages */
415 LASSERT (ktx == NULL || ktx->ktx_nmappedpages == 0);
420 kqswnal_tx_done (kqswnal_tx_t *ktx, int error)
422 if (ktx->ktx_forwarding) /* router asked me to forward this packet */
423 kpr_fwd_done (&kqswnal_data.kqn_router,
424 (kpr_fwd_desc_t *)ktx->ktx_args[0], error);
425 else /* packet sourced locally */
426 lib_finalize (&kqswnal_lib, ktx->ktx_args[0],
427 (lib_msg_t *)ktx->ktx_args[1]);
429 kqswnal_put_idle_tx (ktx);
433 kqswnal_txhandler(EP_TXD *txd, void *arg, int status)
435 kqswnal_tx_t *ktx = (kqswnal_tx_t *)arg;
437 LASSERT (txd != NULL);
438 LASSERT (ktx != NULL);
440 CDEBUG(D_NET, "txd %p, arg %p status %d\n", txd, arg, status);
442 if (status == EP_SUCCESS)
443 atomic_inc (&kqswnal_packets_transmitted);
445 if (status != EP_SUCCESS)
447 CERROR ("Tx completion to "LPX64" failed: %d\n",
448 ktx->ktx_nid, status);
450 kqswnal_notify_peer_down(ktx);
454 kqswnal_tx_done (ktx, status);
458 kqswnal_launch (kqswnal_tx_t *ktx)
460 /* Don't block for transmit descriptor if we're in interrupt context */
461 int attr = in_interrupt() ? (EP_NO_SLEEP | EP_NO_ALLOC) : 0;
462 int dest = kqswnal_nid2elanid (ktx->ktx_nid);
466 ktx->ktx_launchtime = jiffies;
468 LASSERT (dest >= 0); /* must be a peer */
469 rc = ep_transmit_large(kqswnal_data.kqn_eptx, dest,
470 ktx->ktx_port, attr, kqswnal_txhandler,
471 ktx, ktx->ktx_iov, ktx->ktx_niov);
473 case 0: /* success */
474 atomic_inc (&kqswnal_packets_launched);
477 case ENOMEM: /* can't allocate ep txd => queue for later */
478 LASSERT (in_interrupt());
480 spin_lock_irqsave (&kqswnal_data.kqn_sched_lock, flags);
482 list_add_tail (&ktx->ktx_delayed_list, &kqswnal_data.kqn_delayedtxds);
483 if (waitqueue_active (&kqswnal_data.kqn_sched_waitq))
484 wake_up (&kqswnal_data.kqn_sched_waitq);
486 spin_unlock_irqrestore (&kqswnal_data.kqn_sched_lock, flags);
489 default: /* fatal error */
490 CERROR ("Tx to "LPX64" failed: %d\n", ktx->ktx_nid, rc);
491 kqswnal_notify_peer_down(ktx);
497 hdr_type_string (ptl_hdr_t *hdr)
509 return ("<UNKNOWN>");
514 kqswnal_cerror_hdr(ptl_hdr_t * hdr)
516 char *type_str = hdr_type_string (hdr);
518 CERROR("P3 Header at %p of type %s\n", hdr, type_str);
519 CERROR(" From nid/pid "LPU64"/%u", NTOH__u64(hdr->src_nid),
520 NTOH__u32(hdr->src_pid));
521 CERROR(" To nid/pid "LPU64"/%u\n", NTOH__u64(hdr->dest_nid),
522 NTOH__u32(hdr->dest_pid));
524 switch (NTOH__u32(hdr->type)) {
526 CERROR(" Ptl index %d, ack md "LPX64"."LPX64", "
527 "match bits "LPX64"\n",
528 NTOH__u32 (hdr->msg.put.ptl_index),
529 hdr->msg.put.ack_wmd.wh_interface_cookie,
530 hdr->msg.put.ack_wmd.wh_object_cookie,
531 NTOH__u64 (hdr->msg.put.match_bits));
532 CERROR(" Length %d, offset %d, hdr data "LPX64"\n",
533 NTOH__u32(PTL_HDR_LENGTH(hdr)),
534 NTOH__u32(hdr->msg.put.offset),
535 hdr->msg.put.hdr_data);
539 CERROR(" Ptl index %d, return md "LPX64"."LPX64", "
540 "match bits "LPX64"\n",
541 NTOH__u32 (hdr->msg.get.ptl_index),
542 hdr->msg.get.return_wmd.wh_interface_cookie,
543 hdr->msg.get.return_wmd.wh_object_cookie,
544 hdr->msg.get.match_bits);
545 CERROR(" Length %d, src offset %d\n",
546 NTOH__u32 (hdr->msg.get.sink_length),
547 NTOH__u32 (hdr->msg.get.src_offset));
551 CERROR(" dst md "LPX64"."LPX64", manipulated length %d\n",
552 hdr->msg.ack.dst_wmd.wh_interface_cookie,
553 hdr->msg.ack.dst_wmd.wh_object_cookie,
554 NTOH__u32 (hdr->msg.ack.mlength));
558 CERROR(" dst md "LPX64"."LPX64", length %d\n",
559 hdr->msg.reply.dst_wmd.wh_interface_cookie,
560 hdr->msg.reply.dst_wmd.wh_object_cookie,
561 NTOH__u32 (PTL_HDR_LENGTH(hdr)));
564 } /* end of print_hdr() */
567 kqswnal_sendmsg (nal_cb_t *nal,
574 unsigned int payload_niov,
575 struct iovec *payload_iov,
576 ptl_kiov_t *payload_kiov,
581 ptl_nid_t gatewaynid;
588 CDEBUG(D_NET, "sending "LPSZ" bytes in %d frags to nid: "LPX64
589 " pid %u\n", payload_nob, payload_niov, nid, pid);
591 LASSERT (payload_nob == 0 || payload_niov > 0);
592 LASSERT (payload_niov <= PTL_MD_MAX_IOV);
594 /* It must be OK to kmap() if required */
595 LASSERT (payload_kiov == NULL || !in_interrupt ());
596 /* payload is either all vaddrs or all pages */
597 LASSERT (!(payload_kiov != NULL && payload_iov != NULL));
599 if (payload_nob > KQSW_MAXPAYLOAD) {
600 CERROR ("request exceeds MTU size "LPSZ" (max %u).\n",
601 payload_nob, KQSW_MAXPAYLOAD);
605 if (kqswnal_nid2elanid (nid) < 0) { /* Can't send direct: find gateway? */
606 rc = kpr_lookup (&kqswnal_data.kqn_router, nid,
607 sizeof (ptl_hdr_t) + payload_nob, &gatewaynid);
609 CERROR("Can't route to "LPX64": router error %d\n",
613 if (kqswnal_nid2elanid (gatewaynid) < 0) {
614 CERROR("Bad gateway "LPX64" for "LPX64"\n",
621 /* I may not block for a transmit descriptor if I might block the
622 * receiver, or an interrupt handler. */
623 ktx = kqswnal_get_idle_tx(NULL, !(type == PTL_MSG_ACK ||
624 type == PTL_MSG_REPLY ||
627 kqswnal_cerror_hdr (hdr);
628 return (PTL_NOSPACE);
631 memcpy (ktx->ktx_buffer, hdr, sizeof (*hdr)); /* copy hdr from caller's stack */
632 ktx->ktx_wire_hdr = (ptl_hdr_t *)ktx->ktx_buffer;
635 csum = kqsw_csum (0, (char *)hdr, sizeof (*hdr));
636 memcpy (ktx->ktx_buffer + sizeof (*hdr), &csum, sizeof (csum));
637 for (csum = 0, i = 0, sumnob = payload_nob; sumnob > 0; i++) {
638 if (payload_kiov != NULL) {
639 ptl_kiov_t *kiov = &payload_kiov[i];
640 char *addr = ((char *)kmap (kiov->kiov_page)) +
643 csum = kqsw_csum (csum, addr, MIN (sumnob, kiov->kiov_len));
644 sumnob -= kiov->kiov_len;
646 struct iovec *iov = &payload_iov[i];
648 csum = kqsw_csum (csum, iov->iov_base, MIN (sumnob, kiov->iov_len));
649 sumnob -= iov->iov_len;
652 memcpy(ktx->ktx_buffer +sizeof(*hdr) +sizeof(csum), &csum,sizeof(csum));
655 /* Set up first frag from pre-mapped buffer (it's at least the
657 ktx->ktx_iov[0].Base = ktx->ktx_ebuffer;
658 ktx->ktx_iov[0].Len = KQSW_HDR_SIZE;
661 if (payload_nob > 0) { /* got some payload (something more to do) */
662 /* make a single contiguous message? */
663 if (payload_nob <= KQSW_TX_MAXCONTIG) {
664 /* copy payload to ktx_buffer, immediately after hdr */
665 if (payload_kiov != NULL)
666 lib_copy_kiov2buf (ktx->ktx_buffer + KQSW_HDR_SIZE,
667 payload_niov, payload_kiov, payload_nob);
669 lib_copy_iov2buf (ktx->ktx_buffer + KQSW_HDR_SIZE,
670 payload_niov, payload_iov, payload_nob);
671 /* first frag includes payload */
672 ktx->ktx_iov[0].Len += payload_nob;
674 if (payload_kiov != NULL)
675 rc = kqswnal_map_tx_kiov (ktx, payload_nob,
676 payload_niov, payload_kiov);
678 rc = kqswnal_map_tx_iov (ktx, payload_nob,
679 payload_niov, payload_iov);
681 kqswnal_put_idle_tx (ktx);
687 ktx->ktx_port = (payload_nob <= KQSW_SMALLPAYLOAD) ?
688 EP_SVC_LARGE_PORTALS_SMALL : EP_SVC_LARGE_PORTALS_LARGE;
690 ktx->ktx_forwarding = 0; /* => lib_finalize() on completion */
691 ktx->ktx_args[0] = private;
692 ktx->ktx_args[1] = cookie;
694 rc = kqswnal_launch (ktx);
695 if (rc != 0) { /* failed? */
696 CERROR ("Failed to send packet to "LPX64": %d\n", nid, rc);
697 kqswnal_put_idle_tx (ktx);
701 CDEBUG(D_NET, "sent "LPSZ" bytes to "LPX64"\n", payload_nob, nid);
706 kqswnal_send (nal_cb_t *nal,
713 unsigned int payload_niov,
714 struct iovec *payload_iov,
717 return (kqswnal_sendmsg (nal, private, cookie, hdr, type, nid, pid,
718 payload_niov, payload_iov, NULL, payload_nob));
722 kqswnal_send_pages (nal_cb_t *nal,
729 unsigned int payload_niov,
730 ptl_kiov_t *payload_kiov,
733 return (kqswnal_sendmsg (nal, private, cookie, hdr, type, nid, pid,
734 payload_niov, NULL, payload_kiov, payload_nob));
737 int kqswnal_fwd_copy_contig = 0;
740 kqswnal_fwd_packet (void *arg, kpr_fwd_desc_t *fwd)
744 struct iovec *iov = fwd->kprfd_iov;
745 int niov = fwd->kprfd_niov;
746 int nob = fwd->kprfd_nob;
747 ptl_nid_t nid = fwd->kprfd_gateway_nid;
750 CERROR ("checksums for forwarded packets not implemented\n");
753 /* The router wants this NAL to forward a packet */
754 CDEBUG (D_NET, "forwarding [%p] to "LPX64", %d frags %d bytes\n",
755 fwd, nid, niov, nob);
759 ktx = kqswnal_get_idle_tx (fwd, FALSE);
760 if (ktx == NULL) /* can't get txd right now */
761 return; /* fwd will be scheduled when tx desc freed */
763 if (nid == kqswnal_lib.ni.nid) /* gateway is me */
764 nid = fwd->kprfd_target_nid; /* target is final dest */
766 if (kqswnal_nid2elanid (nid) < 0) {
767 CERROR("Can't forward [%p] to "LPX64": not a peer\n", fwd, nid);
772 if (nob > KQSW_NRXMSGBYTES_LARGE) {
773 CERROR ("Can't forward [%p] to "LPX64
774 ": size %d bigger than max packet size %ld\n",
775 fwd, nid, nob, (long)KQSW_NRXMSGBYTES_LARGE);
780 if ((kqswnal_fwd_copy_contig || niov > 1) &&
781 nob <= KQSW_TX_BUFFER_SIZE)
783 /* send from ktx's pre-allocated/mapped contiguous buffer? */
784 lib_copy_iov2buf (ktx->ktx_buffer, niov, iov, nob);
785 ktx->ktx_iov[0].Base = ktx->ktx_ebuffer; /* already mapped */
786 ktx->ktx_iov[0].Len = nob;
789 ktx->ktx_wire_hdr = (ptl_hdr_t *)ktx->ktx_buffer;
794 ktx->ktx_niov = 0; /* no frags mapped yet */
795 rc = kqswnal_map_tx_iov (ktx, nob, niov, iov);
799 ktx->ktx_wire_hdr = (ptl_hdr_t *)iov[0].iov_base;
802 ktx->ktx_port = (nob <= (sizeof (ptl_hdr_t) + KQSW_SMALLPAYLOAD)) ?
803 EP_SVC_LARGE_PORTALS_SMALL : EP_SVC_LARGE_PORTALS_LARGE;
805 ktx->ktx_forwarding = 1;
806 ktx->ktx_args[0] = fwd;
808 rc = kqswnal_launch (ktx);
814 CERROR ("Failed to forward [%p] to "LPX64": %d\n", fwd, nid, rc);
816 kqswnal_put_idle_tx (ktx);
817 /* complete now (with failure) */
818 kpr_fwd_done (&kqswnal_data.kqn_router, fwd, rc);
822 kqswnal_fwd_callback (void *arg, int error)
824 kqswnal_rx_t *krx = (kqswnal_rx_t *)arg;
826 /* The router has finished forwarding this packet */
830 ptl_hdr_t *hdr = (ptl_hdr_t *)page_address (krx->krx_pages[0]);
832 CERROR("Failed to route packet from "LPX64" to "LPX64": %d\n",
833 NTOH__u64(hdr->src_nid), NTOH__u64(hdr->dest_nid),error);
836 kqswnal_requeue_rx (krx);
840 kqswnal_rx (kqswnal_rx_t *krx)
842 ptl_hdr_t *hdr = (ptl_hdr_t *) page_address (krx->krx_pages[0]);
843 ptl_nid_t dest_nid = NTOH__u64 (hdr->dest_nid);
847 if (dest_nid == kqswnal_lib.ni.nid) { /* It's for me :) */
848 /* NB krx requeued when lib_parse() calls back kqswnal_recv */
849 lib_parse (&kqswnal_lib, hdr, krx);
854 CERROR ("checksums for forwarded packets not implemented\n");
857 if (kqswnal_nid2elanid (dest_nid) >= 0) /* should have gone direct to peer */
859 CERROR("dropping packet from "LPX64" for "LPX64
860 ": target is peer\n", NTOH__u64(hdr->src_nid), dest_nid);
861 kqswnal_requeue_rx (krx);
865 /* NB forwarding may destroy iov; rebuild every time */
866 for (nob = krx->krx_nob, niov = 0; nob > 0; nob -= PAGE_SIZE, niov++)
868 LASSERT (niov < krx->krx_npages);
869 krx->krx_iov[niov].iov_base= page_address(krx->krx_pages[niov]);
870 krx->krx_iov[niov].iov_len = MIN(PAGE_SIZE, nob);
873 kpr_fwd_init (&krx->krx_fwd, dest_nid,
874 krx->krx_nob, niov, krx->krx_iov,
875 kqswnal_fwd_callback, krx);
877 kpr_fwd_start (&kqswnal_data.kqn_router, &krx->krx_fwd);
880 /* Receive Interrupt Handler: posts to schedulers */
882 kqswnal_rxhandler(EP_RXD *rxd)
885 int nob = ep_rxd_len (rxd);
886 int status = ep_rxd_status (rxd);
887 kqswnal_rx_t *krx = (kqswnal_rx_t *)ep_rxd_arg (rxd);
889 CDEBUG(D_NET, "kqswnal_rxhandler: rxd %p, krx %p, nob %d, status %d\n",
890 rxd, krx, nob, status);
892 LASSERT (krx != NULL);
897 /* must receive a whole header to be able to parse */
898 if (status != EP_SUCCESS || nob < sizeof (ptl_hdr_t))
900 /* receives complete with failure when receiver is removed */
901 if (kqswnal_data.kqn_shuttingdown)
904 CERROR("receive status failed with status %d nob %d\n",
905 ep_rxd_status(rxd), nob);
906 kqswnal_requeue_rx (krx);
910 atomic_inc (&kqswnal_packets_received);
912 spin_lock_irqsave (&kqswnal_data.kqn_sched_lock, flags);
914 list_add_tail (&krx->krx_list, &kqswnal_data.kqn_readyrxds);
915 if (waitqueue_active (&kqswnal_data.kqn_sched_waitq))
916 wake_up (&kqswnal_data.kqn_sched_waitq);
918 spin_unlock_irqrestore (&kqswnal_data.kqn_sched_lock, flags);
923 kqswnal_csum_error (kqswnal_rx_t *krx, int ishdr)
925 ptl_hdr_t *hdr = (ptl_hdr_t *)page_address (krx->krx_pages[0]);
927 CERROR ("%s checksum mismatch %p: dnid "LPX64", snid "LPX64
928 ", dpid %d, spid %d, type %d\n",
929 ishdr ? "Header" : "Payload", krx,
930 NTOH__u64(hdr->dest_nid), NTOH__u64(hdr->src_nid)
931 NTOH__u32(hdr->dest_pid), NTOH__u32(hdr->src_pid),
932 NTOH__u32(hdr->type));
934 switch (NTOH__u32 (hdr->type))
937 CERROR("ACK: mlen %d dmd "LPX64"."LPX64" match "LPX64
939 NTOH__u32(hdr->msg.ack.mlength),
940 hdr->msg.ack.dst_wmd.handle_cookie,
941 hdr->msg.ack.dst_wmd.handle_idx,
942 NTOH__u64(hdr->msg.ack.match_bits),
943 NTOH__u32(hdr->msg.ack.length));
946 CERROR("PUT: ptl %d amd "LPX64"."LPX64" match "LPX64
947 " len %u off %u data "LPX64"\n",
948 NTOH__u32(hdr->msg.put.ptl_index),
949 hdr->msg.put.ack_wmd.handle_cookie,
950 hdr->msg.put.ack_wmd.handle_idx,
951 NTOH__u64(hdr->msg.put.match_bits),
952 NTOH__u32(hdr->msg.put.length),
953 NTOH__u32(hdr->msg.put.offset),
954 hdr->msg.put.hdr_data);
957 CERROR ("GET: <>\n");
960 CERROR ("REPLY: <>\n");
963 CERROR ("TYPE?: <>\n");
969 kqswnal_recvmsg (nal_cb_t *nal,
978 kqswnal_rx_t *krx = (kqswnal_rx_t *)private;
986 kqsw_csum_t senders_csum;
987 kqsw_csum_t payload_csum = 0;
988 kqsw_csum_t hdr_csum = kqsw_csum(0, page_address(krx->krx_pages[0]),
990 size_t csum_len = mlen;
993 static atomic_t csum_counter;
994 int csum_verbose = (atomic_read(&csum_counter)%1000001) == 0;
996 atomic_inc (&csum_counter);
998 memcpy (&senders_csum, ((char *)page_address (krx->krx_pages[0])) +
999 sizeof (ptl_hdr_t), sizeof (kqsw_csum_t));
1000 if (senders_csum != hdr_csum)
1001 kqswnal_csum_error (krx, 1);
1003 CDEBUG(D_NET,"kqswnal_recv, mlen="LPSZ", rlen="LPSZ"\n", mlen, rlen);
1005 /* What was actually received must be >= payload.
1006 * This is an LASSERT, as lib_finalize() doesn't have a completion status. */
1007 LASSERT (krx->krx_nob >= KQSW_HDR_SIZE + mlen);
1008 LASSERT (mlen <= rlen);
1010 /* It must be OK to kmap() if required */
1011 LASSERT (kiov == NULL || !in_interrupt ());
1012 /* Either all pages or all vaddrs */
1013 LASSERT (!(kiov != NULL && iov != NULL));
1018 page_ptr = ((char *) page_address(krx->krx_pages[0])) +
1020 page_nob = PAGE_SIZE - KQSW_HDR_SIZE;
1024 iov_ptr = ((char *)kmap (kiov->kiov_page)) + kiov->kiov_offset;
1025 iov_nob = kiov->kiov_len;
1027 iov_ptr = iov->iov_base;
1028 iov_nob = iov->iov_len;
1033 /* We expect the iov to exactly match mlen */
1034 LASSERT (iov_nob <= mlen);
1036 frag = MIN (page_nob, iov_nob);
1037 memcpy (iov_ptr, page_ptr, frag);
1039 payload_csum = kqsw_csum (payload_csum, iov_ptr, frag);
1053 LASSERT (page < krx->krx_npages);
1054 page_ptr = page_address(krx->krx_pages[page]);
1055 page_nob = PAGE_SIZE;
1061 else if (kiov != NULL) {
1062 kunmap (kiov->kiov_page);
1066 iov_ptr = ((char *)kmap (kiov->kiov_page)) + kiov->kiov_offset;
1067 iov_nob = kiov->kiov_len;
1072 iov_ptr = iov->iov_base;
1073 iov_nob = iov->iov_len;
1078 kunmap (kiov->kiov_page);
1082 memcpy (&senders_csum, ((char *)page_address (krx->krx_pages[0])) +
1083 sizeof(ptl_hdr_t) + sizeof(kqsw_csum_t), sizeof(kqsw_csum_t));
1085 if (csum_len != rlen)
1086 CERROR("Unable to checksum data in user's buffer\n");
1087 else if (senders_csum != payload_csum)
1088 kqswnal_csum_error (krx, 0);
1091 CERROR("hdr csum %lx, payload_csum %lx, csum_frags %d, "
1093 hdr_csum, payload_csum, csum_frags, csum_nob);
1095 lib_finalize(nal, private, cookie);
1097 kqswnal_requeue_rx (krx);
1103 kqswnal_recv(nal_cb_t *nal,
1111 return (kqswnal_recvmsg (nal, private, cookie, niov, iov, NULL, mlen, rlen));
1115 kqswnal_recv_pages (nal_cb_t *nal,
1123 return (kqswnal_recvmsg (nal, private, cookie, niov, NULL, kiov, mlen, rlen));
1127 kqswnal_thread_start (int (*fn)(void *arg), void *arg)
1129 long pid = kernel_thread (fn, arg, 0);
1134 atomic_inc (&kqswnal_data.kqn_nthreads);
1139 kqswnal_thread_fini (void)
1141 atomic_dec (&kqswnal_data.kqn_nthreads);
1145 kqswnal_scheduler (void *arg)
1149 kpr_fwd_desc_t *fwd;
1155 kportal_daemonize ("kqswnal_sched");
1156 kportal_blockallsigs ();
1158 spin_lock_irqsave (&kqswnal_data.kqn_sched_lock, flags);
1160 while (!kqswnal_data.kqn_shuttingdown)
1162 did_something = FALSE;
1164 if (!list_empty (&kqswnal_data.kqn_readyrxds))
1166 krx = list_entry(kqswnal_data.kqn_readyrxds.next,
1167 kqswnal_rx_t, krx_list);
1168 list_del (&krx->krx_list);
1169 spin_unlock_irqrestore(&kqswnal_data.kqn_sched_lock,
1174 did_something = TRUE;
1175 spin_lock_irqsave(&kqswnal_data.kqn_sched_lock, flags);
1178 if (!list_empty (&kqswnal_data.kqn_delayedtxds))
1180 ktx = list_entry(kqswnal_data.kqn_delayedtxds.next,
1181 kqswnal_tx_t, ktx_list);
1182 list_del_init (&ktx->ktx_delayed_list);
1183 spin_unlock_irqrestore(&kqswnal_data.kqn_sched_lock,
1186 rc = kqswnal_launch (ktx);
1187 if (rc != 0) /* failed: ktx_nid down? */
1189 CERROR("Failed delayed transmit to "LPX64
1190 ": %d\n", ktx->ktx_nid, rc);
1191 kqswnal_tx_done (ktx, rc);
1194 did_something = TRUE;
1195 spin_lock_irqsave (&kqswnal_data.kqn_sched_lock, flags);
1198 if (!list_empty (&kqswnal_data.kqn_delayedfwds))
1200 fwd = list_entry (kqswnal_data.kqn_delayedfwds.next, kpr_fwd_desc_t, kprfd_list);
1201 list_del (&fwd->kprfd_list);
1202 spin_unlock_irqrestore (&kqswnal_data.kqn_sched_lock, flags);
1204 kqswnal_fwd_packet (NULL, fwd);
1206 did_something = TRUE;
1207 spin_lock_irqsave (&kqswnal_data.kqn_sched_lock, flags);
1210 /* nothing to do or hogging CPU */
1211 if (!did_something || counter++ == KQSW_RESCHED) {
1212 spin_unlock_irqrestore(&kqswnal_data.kqn_sched_lock,
1217 if (!did_something) {
1218 rc = wait_event_interruptible (kqswnal_data.kqn_sched_waitq,
1219 kqswnal_data.kqn_shuttingdown ||
1220 !list_empty(&kqswnal_data.kqn_readyrxds) ||
1221 !list_empty(&kqswnal_data.kqn_delayedtxds) ||
1222 !list_empty(&kqswnal_data.kqn_delayedfwds));
1224 } else if (current->need_resched)
1227 spin_lock_irqsave (&kqswnal_data.kqn_sched_lock, flags);
1231 spin_unlock_irqrestore (&kqswnal_data.kqn_sched_lock, flags);
1233 kqswnal_thread_fini ();
1237 nal_cb_t kqswnal_lib =
1239 nal_data: &kqswnal_data, /* NAL private data */
1240 cb_send: kqswnal_send,
1241 cb_send_pages: kqswnal_send_pages,
1242 cb_recv: kqswnal_recv,
1243 cb_recv_pages: kqswnal_recv_pages,
1244 cb_read: kqswnal_read,
1245 cb_write: kqswnal_write,
1246 cb_malloc: kqswnal_malloc,
1247 cb_free: kqswnal_free,
1248 cb_printf: kqswnal_printf,
1249 cb_cli: kqswnal_cli,
1250 cb_sti: kqswnal_sti,
1251 cb_dist: kqswnal_dist