2 * Copyright (C) 2002 Cluster File Systems, Inc.
3 * Author: Eric Barton <eric@bartonsoftware.com>
5 * Copyright (C) 2002, Lawrence Livermore National Labs (LLNL)
6 * W. Marcus Miller - Based on ksocknal
8 * This file is part of Portals, http://www.sf.net/projects/lustre/
10 * Portals is free software; you can redistribute it and/or
11 * modify it under the terms of version 2 of the GNU General Public
12 * License as published by the Free Software Foundation.
14 * Portals is distributed in the hope that it will be useful,
15 * but WITHOUT ANY WARRANTY; without even the implied warranty of
16 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 * GNU General Public License for more details.
19 * You should have received a copy of the GNU General Public License
20 * along with Portals; if not, write to the Free Software
21 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
27 ptl_handle_ni_t kqswnal_ni;
29 kqswnal_data_t kqswnal_data;
31 kpr_nal_interface_t kqswnal_router_interface = {
34 kprni_fwd: kqswnal_fwd_packet,
35 kprni_notify: NULL, /* we're connectionless */
39 #define QSWNAL_SYSCTL 201
41 #define QSWNAL_SYSCTL_OPTIMIZED_GETS 1
42 #define QSWNAL_SYSCTL_COPY_SMALL_FWD 2
44 static ctl_table kqswnal_ctl_table[] = {
45 {QSWNAL_SYSCTL_OPTIMIZED_GETS, "optimized_gets",
46 &kqswnal_data.kqn_optimized_gets, sizeof (int),
47 0644, NULL, &proc_dointvec},
48 {QSWNAL_SYSCTL_COPY_SMALL_FWD, "copy_small_fwd",
49 &kqswnal_data.kqn_copy_small_fwd, sizeof (int),
50 0644, NULL, &proc_dointvec},
54 static ctl_table kqswnal_top_ctl_table[] = {
55 {QSWNAL_SYSCTL, "qswnal", NULL, 0, 0555, kqswnal_ctl_table},
61 kqswnal_forward(nal_t *nal,
63 void *args, size_t args_len,
64 void *ret, size_t ret_len)
66 kqswnal_data_t *k = nal->nal_data;
67 nal_cb_t *nal_cb = k->kqn_cb;
69 LASSERT (nal == &kqswnal_api);
70 LASSERT (k == &kqswnal_data);
71 LASSERT (nal_cb == &kqswnal_lib);
73 lib_dispatch(nal_cb, k, id, args, ret); /* nal needs k */
78 kqswnal_lock (nal_t *nal, unsigned long *flags)
80 kqswnal_data_t *k = nal->nal_data;
81 nal_cb_t *nal_cb = k->kqn_cb;
83 LASSERT (nal == &kqswnal_api);
84 LASSERT (k == &kqswnal_data);
85 LASSERT (nal_cb == &kqswnal_lib);
87 nal_cb->cb_cli(nal_cb,flags);
91 kqswnal_unlock(nal_t *nal, unsigned long *flags)
93 kqswnal_data_t *k = nal->nal_data;
94 nal_cb_t *nal_cb = k->kqn_cb;
96 LASSERT (nal == &kqswnal_api);
97 LASSERT (k == &kqswnal_data);
98 LASSERT (nal_cb == &kqswnal_lib);
100 nal_cb->cb_sti(nal_cb,flags);
104 kqswnal_shutdown(nal_t *nal, int ni)
106 CDEBUG (D_NET, "shutdown\n");
108 LASSERT (nal == &kqswnal_api);
113 kqswnal_yield(nal_t *nal, unsigned long *flags, int milliseconds)
115 /* NB called holding statelock */
117 unsigned long now = jiffies;
119 CDEBUG (D_NET, "yield\n");
121 if (milliseconds == 0) {
122 if (current->need_resched)
127 init_waitqueue_entry(&wait, current);
128 set_current_state(TASK_INTERRUPTIBLE);
129 add_wait_queue(&kqswnal_data.kqn_yield_waitq, &wait);
131 kqswnal_unlock(nal, flags);
133 if (milliseconds < 0)
136 schedule_timeout((milliseconds * HZ) / 1000);
138 kqswnal_lock(nal, flags);
140 remove_wait_queue(&kqswnal_data.kqn_yield_waitq, &wait);
142 if (milliseconds > 0) {
143 milliseconds -= ((jiffies - now) * 1000) / HZ;
144 if (milliseconds < 0)
148 return (milliseconds);
152 kqswnal_init(int interface, ptl_pt_index_t ptl_size, ptl_ac_index_t ac_size,
153 ptl_pid_t requested_pid)
155 ptl_nid_t mynid = kqswnal_elanid2nid (kqswnal_data.kqn_elanid);
156 int nnids = kqswnal_data.kqn_nnodes;
158 CDEBUG(D_NET, "calling lib_init with nid "LPX64" of %d\n", mynid, nnids);
160 lib_init(&kqswnal_lib, mynid, 0, nnids, ptl_size, ac_size);
162 return (&kqswnal_api);
166 kqswnal_get_tx_desc (struct portals_cfg *pcfg)
169 struct list_head *tmp;
171 int index = pcfg->pcfg_count;
174 spin_lock_irqsave (&kqswnal_data.kqn_idletxd_lock, flags);
176 list_for_each (tmp, &kqswnal_data.kqn_activetxds) {
180 ktx = list_entry (tmp, kqswnal_tx_t, ktx_list);
182 pcfg->pcfg_pbuf1 = (char *)ktx;
183 pcfg->pcfg_count = NTOH__u32(ktx->ktx_wire_hdr->type);
184 pcfg->pcfg_size = NTOH__u32(ktx->ktx_wire_hdr->payload_length);
185 pcfg->pcfg_nid = NTOH__u64(ktx->ktx_wire_hdr->dest_nid);
186 pcfg->pcfg_nid2 = ktx->ktx_nid;
187 pcfg->pcfg_misc = ktx->ktx_launcher;
188 pcfg->pcfg_flags = (list_empty (&ktx->ktx_delayed_list) ? 0 : 1) |
189 (!ktx->ktx_isnblk ? 0 : 2) |
190 (ktx->ktx_state << 2);
195 spin_unlock_irqrestore (&kqswnal_data.kqn_idletxd_lock, flags);
200 kqswnal_cmd (struct portals_cfg *pcfg, void *private)
202 LASSERT (pcfg != NULL);
204 switch (pcfg->pcfg_command) {
205 case NAL_CMD_GET_TXDESC:
206 return (kqswnal_get_tx_desc (pcfg));
208 case NAL_CMD_REGISTER_MYNID:
209 CDEBUG (D_IOCTL, "setting NID offset to "LPX64" (was "LPX64")\n",
210 pcfg->pcfg_nid - kqswnal_data.kqn_elanid,
211 kqswnal_data.kqn_nid_offset);
212 kqswnal_data.kqn_nid_offset =
213 pcfg->pcfg_nid - kqswnal_data.kqn_elanid;
214 kqswnal_lib.ni.nid = pcfg->pcfg_nid;
223 kqswnal_finalise (void)
225 switch (kqswnal_data.kqn_init)
232 if (kqswnal_data.kqn_sysctl != NULL)
233 unregister_sysctl_table (kqswnal_data.kqn_sysctl);
235 PORTAL_SYMBOL_UNREGISTER (kqswnal_ni);
236 kportal_nal_unregister(QSWNAL);
240 PtlNIFini (kqswnal_ni);
241 lib_fini (&kqswnal_lib);
247 case KQN_INIT_NOTHING:
251 /**********************************************************************/
252 /* Make router stop her calling me and fail any more call-ins */
253 kpr_shutdown (&kqswnal_data.kqn_router);
255 /**********************************************************************/
256 /* flag threads we've started to terminate and wait for all to ack */
258 kqswnal_data.kqn_shuttingdown = 1;
259 wake_up_all (&kqswnal_data.kqn_sched_waitq);
261 while (atomic_read (&kqswnal_data.kqn_nthreads_running) != 0) {
262 CDEBUG(D_NET, "waiting for %d threads to start shutting down\n",
263 atomic_read (&kqswnal_data.kqn_nthreads_running));
264 set_current_state (TASK_UNINTERRUPTIBLE);
265 schedule_timeout (HZ);
268 /**********************************************************************/
269 /* close elan comms */
271 if (kqswnal_data.kqn_eprx_small != NULL)
272 ep_free_rcvr (kqswnal_data.kqn_eprx_small);
274 if (kqswnal_data.kqn_eprx_large != NULL)
275 ep_free_rcvr (kqswnal_data.kqn_eprx_large);
277 if (kqswnal_data.kqn_eptx != NULL)
278 ep_free_xmtr (kqswnal_data.kqn_eptx);
280 /* freeing the xmtr completes all txs pdq */
281 LASSERT(list_empty(&kqswnal_data.kqn_activetxds));
283 if (kqswnal_data.kqn_eprx_small != NULL)
284 ep_remove_large_rcvr (kqswnal_data.kqn_eprx_small);
286 if (kqswnal_data.kqn_eprx_large != NULL)
287 ep_remove_large_rcvr (kqswnal_data.kqn_eprx_large);
289 /* wait for transmits to complete */
290 while (!list_empty(&kqswnal_data.kqn_activetxds)) {
291 CWARN("waiting for active transmits to complete\n");
292 set_current_state(TASK_UNINTERRUPTIBLE);
293 schedule_timeout(HZ);
296 if (kqswnal_data.kqn_eptx != NULL)
297 ep_free_large_xmtr (kqswnal_data.kqn_eptx);
299 /**********************************************************************/
300 /* flag threads to terminate, wake them and wait for them to die */
302 kqswnal_data.kqn_shuttingdown = 2;
303 wake_up_all (&kqswnal_data.kqn_sched_waitq);
305 while (atomic_read (&kqswnal_data.kqn_nthreads) != 0) {
306 CDEBUG(D_NET, "waiting for %d threads to terminate\n",
307 atomic_read (&kqswnal_data.kqn_nthreads));
308 set_current_state (TASK_UNINTERRUPTIBLE);
309 schedule_timeout (HZ);
312 /**********************************************************************/
313 /* No more threads. No more portals, router or comms callbacks!
314 * I control the horizontals and the verticals...
318 LASSERT (list_empty (&kqswnal_data.kqn_readyrxds));
321 /**********************************************************************/
322 /* Complete any blocked forwarding packets with error
325 while (!list_empty (&kqswnal_data.kqn_idletxd_fwdq))
327 kpr_fwd_desc_t *fwd = list_entry (kqswnal_data.kqn_idletxd_fwdq.next,
328 kpr_fwd_desc_t, kprfd_list);
329 list_del (&fwd->kprfd_list);
330 kpr_fwd_done (&kqswnal_data.kqn_router, fwd, -EHOSTUNREACH);
333 while (!list_empty (&kqswnal_data.kqn_delayedfwds))
335 kpr_fwd_desc_t *fwd = list_entry (kqswnal_data.kqn_delayedfwds.next,
336 kpr_fwd_desc_t, kprfd_list);
337 list_del (&fwd->kprfd_list);
338 kpr_fwd_done (&kqswnal_data.kqn_router, fwd, -EHOSTUNREACH);
341 /**********************************************************************/
342 /* Wait for router to complete any packets I sent her
345 kpr_deregister (&kqswnal_data.kqn_router);
348 /**********************************************************************/
349 /* Unmap message buffers and free all descriptors and buffers
353 /* FTTB, we need to unmap any remaining mapped memory. When
354 * ep_dvma_release() get fixed (and releases any mappings in the
355 * region), we can delete all the code from here --------> */
357 if (kqswnal_data.kqn_txds != NULL) {
360 for (i = 0; i < KQSW_NTXMSGS + KQSW_NNBLK_TXMSGS; i++) {
361 kqswnal_tx_t *ktx = &kqswnal_data.kqn_txds[i];
363 /* If ktx has a buffer, it got mapped; unmap now.
364 * NB only the pre-mapped stuff is still mapped
365 * since all tx descs must be idle */
367 if (ktx->ktx_buffer != NULL)
368 ep_dvma_unload(kqswnal_data.kqn_ep,
369 kqswnal_data.kqn_ep_tx_nmh,
374 if (kqswnal_data.kqn_rxds != NULL) {
377 for (i = 0; i < KQSW_NRXMSGS_SMALL + KQSW_NRXMSGS_LARGE; i++) {
378 kqswnal_rx_t *krx = &kqswnal_data.kqn_rxds[i];
380 /* If krx_kiov[0].kiov_page got allocated, it got mapped.
381 * NB subsequent pages get merged */
383 if (krx->krx_kiov[0].kiov_page != NULL)
384 ep_dvma_unload(kqswnal_data.kqn_ep,
385 kqswnal_data.kqn_ep_rx_nmh,
386 &krx->krx_elanbuffer);
389 /* <----------- to here */
391 if (kqswnal_data.kqn_ep_rx_nmh != NULL)
392 ep_dvma_release(kqswnal_data.kqn_ep, kqswnal_data.kqn_ep_rx_nmh);
394 if (kqswnal_data.kqn_ep_tx_nmh != NULL)
395 ep_dvma_release(kqswnal_data.kqn_ep, kqswnal_data.kqn_ep_tx_nmh);
397 if (kqswnal_data.kqn_eprxdmahandle != NULL)
399 elan3_dvma_unload(kqswnal_data.kqn_ep->DmaState,
400 kqswnal_data.kqn_eprxdmahandle, 0,
401 KQSW_NRXMSGPAGES_SMALL * KQSW_NRXMSGS_SMALL +
402 KQSW_NRXMSGPAGES_LARGE * KQSW_NRXMSGS_LARGE);
404 elan3_dma_release(kqswnal_data.kqn_ep->DmaState,
405 kqswnal_data.kqn_eprxdmahandle);
408 if (kqswnal_data.kqn_eptxdmahandle != NULL)
410 elan3_dvma_unload(kqswnal_data.kqn_ep->DmaState,
411 kqswnal_data.kqn_eptxdmahandle, 0,
412 KQSW_NTXMSGPAGES * (KQSW_NTXMSGS +
415 elan3_dma_release(kqswnal_data.kqn_ep->DmaState,
416 kqswnal_data.kqn_eptxdmahandle);
420 if (kqswnal_data.kqn_txds != NULL)
424 for (i = 0; i < KQSW_NTXMSGS + KQSW_NNBLK_TXMSGS; i++)
426 kqswnal_tx_t *ktx = &kqswnal_data.kqn_txds[i];
428 if (ktx->ktx_buffer != NULL)
429 PORTAL_FREE(ktx->ktx_buffer,
430 KQSW_TX_BUFFER_SIZE);
433 PORTAL_FREE(kqswnal_data.kqn_txds,
434 sizeof (kqswnal_tx_t) * (KQSW_NTXMSGS +
438 if (kqswnal_data.kqn_rxds != NULL)
443 for (i = 0; i < KQSW_NRXMSGS_SMALL + KQSW_NRXMSGS_LARGE; i++)
445 kqswnal_rx_t *krx = &kqswnal_data.kqn_rxds[i];
447 for (j = 0; j < krx->krx_npages; j++)
448 if (krx->krx_kiov[j].kiov_page != NULL)
449 __free_page (krx->krx_kiov[j].kiov_page);
452 PORTAL_FREE(kqswnal_data.kqn_rxds,
453 sizeof(kqswnal_rx_t) * (KQSW_NRXMSGS_SMALL +
454 KQSW_NRXMSGS_LARGE));
457 /* resets flags, pointers to NULL etc */
458 memset(&kqswnal_data, 0, sizeof (kqswnal_data));
460 CDEBUG (D_MALLOC, "done kmem %d\n", atomic_read(&portal_kmemory));
462 printk (KERN_INFO "Lustre: Routing QSW NAL unloaded (final mem %d)\n",
463 atomic_read(&portal_kmemory));
467 kqswnal_initialise (void)
470 EP_RAILMASK all_rails = EP_RAILMASK_ALL;
472 ELAN3_DMA_REQUEST dmareq;
477 int pkmem = atomic_read(&portal_kmemory);
479 LASSERT (kqswnal_data.kqn_init == KQN_INIT_NOTHING);
481 CDEBUG (D_MALLOC, "start kmem %d\n", atomic_read(&portal_kmemory));
483 kqswnal_api.forward = kqswnal_forward;
484 kqswnal_api.shutdown = kqswnal_shutdown;
485 kqswnal_api.yield = kqswnal_yield;
486 kqswnal_api.validate = NULL; /* our api validate is a NOOP */
487 kqswnal_api.lock = kqswnal_lock;
488 kqswnal_api.unlock = kqswnal_unlock;
489 kqswnal_api.nal_data = &kqswnal_data;
491 kqswnal_lib.nal_data = &kqswnal_data;
493 memset(&kqswnal_rpc_success, 0, sizeof(kqswnal_rpc_success));
494 memset(&kqswnal_rpc_failed, 0, sizeof(kqswnal_rpc_failed));
496 kqswnal_rpc_failed.Data[0] = -ECONNREFUSED;
498 kqswnal_rpc_failed.Status = -ECONNREFUSED;
500 /* ensure all pointers NULL etc */
501 memset (&kqswnal_data, 0, sizeof (kqswnal_data));
503 kqswnal_data.kqn_optimized_gets = KQSW_OPTIMIZED_GETS;
504 kqswnal_data.kqn_copy_small_fwd = KQSW_COPY_SMALL_FWD;
506 kqswnal_data.kqn_cb = &kqswnal_lib;
508 INIT_LIST_HEAD (&kqswnal_data.kqn_idletxds);
509 INIT_LIST_HEAD (&kqswnal_data.kqn_nblk_idletxds);
510 INIT_LIST_HEAD (&kqswnal_data.kqn_activetxds);
511 spin_lock_init (&kqswnal_data.kqn_idletxd_lock);
512 init_waitqueue_head (&kqswnal_data.kqn_idletxd_waitq);
513 INIT_LIST_HEAD (&kqswnal_data.kqn_idletxd_fwdq);
515 INIT_LIST_HEAD (&kqswnal_data.kqn_delayedfwds);
516 INIT_LIST_HEAD (&kqswnal_data.kqn_delayedtxds);
517 INIT_LIST_HEAD (&kqswnal_data.kqn_readyrxds);
519 spin_lock_init (&kqswnal_data.kqn_sched_lock);
520 init_waitqueue_head (&kqswnal_data.kqn_sched_waitq);
522 spin_lock_init (&kqswnal_data.kqn_statelock);
523 init_waitqueue_head (&kqswnal_data.kqn_yield_waitq);
525 /* pointers/lists/locks initialised */
526 kqswnal_data.kqn_init = KQN_INIT_DATA;
529 kqswnal_data.kqn_ep = ep_system();
530 if (kqswnal_data.kqn_ep == NULL) {
531 CERROR("Can't initialise EKC\n");
535 if (ep_waitfor_nodeid(kqswnal_data.kqn_ep) == ELAN_INVALID_NODE) {
536 CERROR("Can't get elan ID\n");
541 /**********************************************************************/
542 /* Find the first Elan device */
544 kqswnal_data.kqn_ep = ep_device (0);
545 if (kqswnal_data.kqn_ep == NULL)
547 CERROR ("Can't get elan device 0\n");
552 kqswnal_data.kqn_nid_offset = 0;
553 kqswnal_data.kqn_nnodes = ep_numnodes (kqswnal_data.kqn_ep);
554 kqswnal_data.kqn_elanid = ep_nodeid (kqswnal_data.kqn_ep);
556 /**********************************************************************/
557 /* Get the transmitter */
559 kqswnal_data.kqn_eptx = ep_alloc_xmtr (kqswnal_data.kqn_ep);
560 if (kqswnal_data.kqn_eptx == NULL)
562 CERROR ("Can't allocate transmitter\n");
567 /**********************************************************************/
568 /* Get the receivers */
570 kqswnal_data.kqn_eprx_small = ep_alloc_rcvr (kqswnal_data.kqn_ep,
571 EP_MSG_SVC_PORTALS_SMALL,
572 KQSW_EP_ENVELOPES_SMALL);
573 if (kqswnal_data.kqn_eprx_small == NULL)
575 CERROR ("Can't install small msg receiver\n");
580 kqswnal_data.kqn_eprx_large = ep_alloc_rcvr (kqswnal_data.kqn_ep,
581 EP_MSG_SVC_PORTALS_LARGE,
582 KQSW_EP_ENVELOPES_LARGE);
583 if (kqswnal_data.kqn_eprx_large == NULL)
585 CERROR ("Can't install large msg receiver\n");
590 /**********************************************************************/
591 /* Reserve Elan address space for transmit descriptors NB we may
592 * either send the contents of associated buffers immediately, or
593 * map them for the peer to suck/blow... */
595 kqswnal_data.kqn_ep_tx_nmh =
596 ep_dvma_reserve(kqswnal_data.kqn_ep,
597 KQSW_NTXMSGPAGES*(KQSW_NTXMSGS+KQSW_NNBLK_TXMSGS),
599 if (kqswnal_data.kqn_ep_tx_nmh == NULL) {
600 CERROR("Can't reserve tx dma space\n");
605 dmareq.Waitfn = DDI_DMA_SLEEP;
606 dmareq.ElanAddr = (E3_Addr) 0;
607 dmareq.Attr = PTE_LOAD_LITTLE_ENDIAN;
608 dmareq.Perm = ELAN_PERM_REMOTEWRITE;
610 rc = elan3_dma_reserve(kqswnal_data.kqn_ep->DmaState,
611 KQSW_NTXMSGPAGES*(KQSW_NTXMSGS+KQSW_NNBLK_TXMSGS),
612 &dmareq, &kqswnal_data.kqn_eptxdmahandle);
613 if (rc != DDI_SUCCESS)
615 CERROR ("Can't reserve rx dma space\n");
620 /**********************************************************************/
621 /* Reserve Elan address space for receive buffers */
623 kqswnal_data.kqn_ep_rx_nmh =
624 ep_dvma_reserve(kqswnal_data.kqn_ep,
625 KQSW_NRXMSGPAGES_SMALL * KQSW_NRXMSGS_SMALL +
626 KQSW_NRXMSGPAGES_LARGE * KQSW_NRXMSGS_LARGE,
628 if (kqswnal_data.kqn_ep_tx_nmh == NULL) {
629 CERROR("Can't reserve rx dma space\n");
634 dmareq.Waitfn = DDI_DMA_SLEEP;
635 dmareq.ElanAddr = (E3_Addr) 0;
636 dmareq.Attr = PTE_LOAD_LITTLE_ENDIAN;
637 dmareq.Perm = ELAN_PERM_REMOTEWRITE;
639 rc = elan3_dma_reserve (kqswnal_data.kqn_ep->DmaState,
640 KQSW_NRXMSGPAGES_SMALL * KQSW_NRXMSGS_SMALL +
641 KQSW_NRXMSGPAGES_LARGE * KQSW_NRXMSGS_LARGE,
642 &dmareq, &kqswnal_data.kqn_eprxdmahandle);
643 if (rc != DDI_SUCCESS)
645 CERROR ("Can't reserve rx dma space\n");
650 /**********************************************************************/
651 /* Allocate/Initialise transmit descriptors */
653 PORTAL_ALLOC(kqswnal_data.kqn_txds,
654 sizeof(kqswnal_tx_t) * (KQSW_NTXMSGS + KQSW_NNBLK_TXMSGS));
655 if (kqswnal_data.kqn_txds == NULL)
661 /* clear flags, null pointers etc */
662 memset(kqswnal_data.kqn_txds, 0,
663 sizeof(kqswnal_tx_t) * (KQSW_NTXMSGS + KQSW_NNBLK_TXMSGS));
664 for (i = 0; i < (KQSW_NTXMSGS + KQSW_NNBLK_TXMSGS); i++)
667 kqswnal_tx_t *ktx = &kqswnal_data.kqn_txds[i];
668 int basepage = i * KQSW_NTXMSGPAGES;
670 PORTAL_ALLOC (ktx->ktx_buffer, KQSW_TX_BUFFER_SIZE);
671 if (ktx->ktx_buffer == NULL)
677 /* Map pre-allocated buffer NOW, to save latency on transmit */
678 premapped_pages = kqswnal_pages_spanned(ktx->ktx_buffer,
679 KQSW_TX_BUFFER_SIZE);
681 ep_dvma_load(kqswnal_data.kqn_ep, NULL,
682 ktx->ktx_buffer, KQSW_TX_BUFFER_SIZE,
683 kqswnal_data.kqn_ep_tx_nmh, basepage,
684 &all_rails, &ktx->ktx_ebuffer);
686 elan3_dvma_kaddr_load (kqswnal_data.kqn_ep->DmaState,
687 kqswnal_data.kqn_eptxdmahandle,
688 ktx->ktx_buffer, KQSW_TX_BUFFER_SIZE,
689 basepage, &ktx->ktx_ebuffer);
691 ktx->ktx_basepage = basepage + premapped_pages; /* message mapping starts here */
692 ktx->ktx_npages = KQSW_NTXMSGPAGES - premapped_pages; /* for this many pages */
694 INIT_LIST_HEAD (&ktx->ktx_delayed_list);
696 ktx->ktx_state = KTX_IDLE;
697 ktx->ktx_isnblk = (i >= KQSW_NTXMSGS);
698 list_add_tail (&ktx->ktx_list,
699 ktx->ktx_isnblk ? &kqswnal_data.kqn_nblk_idletxds :
700 &kqswnal_data.kqn_idletxds);
703 /**********************************************************************/
704 /* Allocate/Initialise receive descriptors */
706 PORTAL_ALLOC (kqswnal_data.kqn_rxds,
707 sizeof (kqswnal_rx_t) * (KQSW_NRXMSGS_SMALL + KQSW_NRXMSGS_LARGE));
708 if (kqswnal_data.kqn_rxds == NULL)
714 memset(kqswnal_data.kqn_rxds, 0, /* clear flags, null pointers etc */
715 sizeof(kqswnal_rx_t) * (KQSW_NRXMSGS_SMALL+KQSW_NRXMSGS_LARGE));
718 for (i = 0; i < KQSW_NRXMSGS_SMALL + KQSW_NRXMSGS_LARGE; i++)
726 kqswnal_rx_t *krx = &kqswnal_data.kqn_rxds[i];
728 if (i < KQSW_NRXMSGS_SMALL)
730 krx->krx_npages = KQSW_NRXMSGPAGES_SMALL;
731 krx->krx_eprx = kqswnal_data.kqn_eprx_small;
735 krx->krx_npages = KQSW_NRXMSGPAGES_LARGE;
736 krx->krx_eprx = kqswnal_data.kqn_eprx_large;
739 LASSERT (krx->krx_npages > 0);
740 for (j = 0; j < krx->krx_npages; j++)
742 struct page *page = alloc_page(GFP_KERNEL);
749 krx->krx_kiov[j].kiov_page = page;
750 LASSERT(page_address(page) != NULL);
753 ep_dvma_load(kqswnal_data.kqn_ep, NULL,
755 PAGE_SIZE, kqswnal_data.kqn_ep_rx_nmh,
756 elan_page_idx, &all_rails, &elanbuffer);
759 krx->krx_elanbuffer = elanbuffer;
761 rc = ep_nmd_merge(&krx->krx_elanbuffer,
762 &krx->krx_elanbuffer,
764 /* NB contiguous mapping */
768 elan3_dvma_kaddr_load(kqswnal_data.kqn_ep->DmaState,
769 kqswnal_data.kqn_eprxdmahandle,
771 PAGE_SIZE, elan_page_idx,
774 krx->krx_elanbuffer = elanbuffer;
776 /* NB contiguous mapping */
777 LASSERT (elanbuffer == krx->krx_elanbuffer + j * PAGE_SIZE);
783 LASSERT (elan_page_idx ==
784 (KQSW_NRXMSGS_SMALL * KQSW_NRXMSGPAGES_SMALL) +
785 (KQSW_NRXMSGS_LARGE * KQSW_NRXMSGPAGES_LARGE));
787 /**********************************************************************/
788 /* Network interface ready to initialise */
790 rc = PtlNIInit(kqswnal_init, 32, 4, 0, &kqswnal_ni);
793 CERROR ("PtlNIInit failed %d\n", rc);
798 kqswnal_data.kqn_init = KQN_INIT_PTL;
800 /**********************************************************************/
801 /* Queue receives, now that it's OK to run their completion callbacks */
803 for (i = 0; i < KQSW_NRXMSGS_SMALL + KQSW_NRXMSGS_LARGE; i++)
805 kqswnal_rx_t *krx = &kqswnal_data.kqn_rxds[i];
807 /* NB this enqueue can allocate/sleep (attr == 0) */
809 rc = ep_queue_receive(krx->krx_eprx, kqswnal_rxhandler, krx,
810 &krx->krx_elanbuffer, 0);
812 rc = ep_queue_receive(krx->krx_eprx, kqswnal_rxhandler, krx,
814 krx->krx_npages * PAGE_SIZE, 0);
816 if (rc != EP_SUCCESS)
818 CERROR ("failed ep_queue_receive %d\n", rc);
824 /**********************************************************************/
825 /* Spawn scheduling threads */
826 for (i = 0; i < smp_num_cpus; i++)
828 rc = kqswnal_thread_start (kqswnal_scheduler, NULL);
831 CERROR ("failed to spawn scheduling thread: %d\n", rc);
837 /**********************************************************************/
838 /* Connect to the router */
839 rc = kpr_register (&kqswnal_data.kqn_router, &kqswnal_router_interface);
840 CDEBUG(D_NET, "Can't initialise routing interface (rc = %d): not routing\n",rc);
842 rc = kportal_nal_register (QSWNAL, &kqswnal_cmd, NULL);
844 CERROR ("Can't initialise command interface (rc = %d)\n", rc);
850 /* Press on regardless even if registering sysctl doesn't work */
851 kqswnal_data.kqn_sysctl = register_sysctl_table (kqswnal_top_ctl_table, 0);
854 PORTAL_SYMBOL_REGISTER(kqswnal_ni);
855 kqswnal_data.kqn_init = KQN_INIT_ALL;
857 printk(KERN_INFO "Lustre: Routing QSW NAL loaded on node %d of %d "
858 "(Routing %s, initial mem %d)\n",
859 kqswnal_data.kqn_elanid, kqswnal_data.kqn_nnodes,
860 kpr_routing (&kqswnal_data.kqn_router) ? "enabled" : "disabled",
867 MODULE_AUTHOR("Cluster File Systems, Inc. <info@clusterfs.com>");
868 MODULE_DESCRIPTION("Kernel Quadrics/Elan NAL v1.01");
869 MODULE_LICENSE("GPL");
871 module_init (kqswnal_initialise);
872 module_exit (kqswnal_finalise);
874 EXPORT_SYMBOL (kqswnal_ni);