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 */
40 kqswnal_forward(nal_t *nal,
42 void *args, size_t args_len,
43 void *ret, size_t ret_len)
45 kqswnal_data_t *k = nal->nal_data;
46 nal_cb_t *nal_cb = k->kqn_cb;
48 LASSERT (nal == &kqswnal_api);
49 LASSERT (k == &kqswnal_data);
50 LASSERT (nal_cb == &kqswnal_lib);
52 lib_dispatch(nal_cb, k, id, args, ret); /* nal needs k */
57 kqswnal_lock (nal_t *nal, unsigned long *flags)
59 kqswnal_data_t *k = nal->nal_data;
60 nal_cb_t *nal_cb = k->kqn_cb;
62 LASSERT (nal == &kqswnal_api);
63 LASSERT (k == &kqswnal_data);
64 LASSERT (nal_cb == &kqswnal_lib);
66 nal_cb->cb_cli(nal_cb,flags);
70 kqswnal_unlock(nal_t *nal, unsigned long *flags)
72 kqswnal_data_t *k = nal->nal_data;
73 nal_cb_t *nal_cb = k->kqn_cb;
75 LASSERT (nal == &kqswnal_api);
76 LASSERT (k == &kqswnal_data);
77 LASSERT (nal_cb == &kqswnal_lib);
79 nal_cb->cb_sti(nal_cb,flags);
83 kqswnal_shutdown(nal_t *nal, int ni)
85 CDEBUG (D_NET, "shutdown\n");
87 LASSERT (nal == &kqswnal_api);
92 kqswnal_yield( nal_t *nal )
94 CDEBUG (D_NET, "yield\n");
96 if (current->need_resched)
102 kqswnal_init(int interface, ptl_pt_index_t ptl_size, ptl_ac_index_t ac_size,
103 ptl_pid_t requested_pid)
105 ptl_nid_t mynid = kqswnal_elanid2nid (kqswnal_data.kqn_elanid);
106 int nnids = kqswnal_data.kqn_nnodes;
108 CDEBUG(D_NET, "calling lib_init with nid "LPX64" of %d\n", mynid, nnids);
110 lib_init(&kqswnal_lib, mynid, 0, nnids, ptl_size, ac_size);
112 return (&kqswnal_api);
116 kqswnal_get_tx_desc (struct portal_ioctl_data *data)
119 struct list_head *tmp;
121 int index = data->ioc_count;
124 spin_lock_irqsave (&kqswnal_data.kqn_idletxd_lock, flags);
126 list_for_each (tmp, &kqswnal_data.kqn_activetxds) {
130 ktx = list_entry (tmp, kqswnal_tx_t, ktx_list);
132 data->ioc_pbuf1 = (char *)ktx;
133 data->ioc_count = NTOH__u32(ktx->ktx_wire_hdr->type);
134 data->ioc_size = NTOH__u32(PTL_HDR_LENGTH(ktx->ktx_wire_hdr));
135 data->ioc_nid = NTOH__u64(ktx->ktx_wire_hdr->dest_nid);
136 data->ioc_nid2 = ktx->ktx_nid;
137 data->ioc_misc = ktx->ktx_launcher;
138 data->ioc_flags = (list_empty (&ktx->ktx_delayed_list) ? 0 : 1) |
139 ((!ktx->ktx_forwarding) ? 0 : 2) |
140 ((!ktx->ktx_isnblk) ? 0 : 4);
146 spin_unlock_irqrestore (&kqswnal_data.kqn_idletxd_lock, flags);
151 kqswnal_cmd (struct portal_ioctl_data *data, void *private)
153 LASSERT (data != NULL);
155 switch (data->ioc_nal_cmd) {
156 case NAL_CMD_GET_TXDESC:
157 return (kqswnal_get_tx_desc (data));
159 case NAL_CMD_REGISTER_MYNID:
160 CDEBUG (D_IOCTL, "setting NID offset to "LPX64" (was "LPX64")\n",
161 data->ioc_nid - kqswnal_data.kqn_elanid,
162 kqswnal_data.kqn_nid_offset);
163 kqswnal_data.kqn_nid_offset =
164 data->ioc_nid - kqswnal_data.kqn_elanid;
165 kqswnal_lib.ni.nid = data->ioc_nid;
174 kqswnal_finalise (void)
176 switch (kqswnal_data.kqn_init)
182 PORTAL_SYMBOL_UNREGISTER (kqswnal_ni);
186 PtlNIFini (kqswnal_ni);
187 lib_fini (&kqswnal_lib);
193 case KQN_INIT_NOTHING:
197 /**********************************************************************/
198 /* Make router stop her calling me and fail any more call-ins */
199 kpr_shutdown (&kqswnal_data.kqn_router);
201 /**********************************************************************/
202 /* flag threads to terminate, wake them and wait for them to die */
204 kqswnal_data.kqn_shuttingdown = 1;
205 wake_up_all (&kqswnal_data.kqn_sched_waitq);
207 while (atomic_read (&kqswnal_data.kqn_nthreads) != 0) {
208 CDEBUG(D_NET, "waiting for %d threads to terminate\n",
209 atomic_read (&kqswnal_data.kqn_nthreads));
210 set_current_state (TASK_UNINTERRUPTIBLE);
211 schedule_timeout (HZ);
214 /**********************************************************************/
215 /* close elan comms */
217 if (kqswnal_data.kqn_eprx_small != NULL)
218 ep_remove_large_rcvr (kqswnal_data.kqn_eprx_small);
220 if (kqswnal_data.kqn_eprx_large != NULL)
221 ep_remove_large_rcvr (kqswnal_data.kqn_eprx_large);
223 if (kqswnal_data.kqn_eptx != NULL)
224 ep_free_large_xmtr (kqswnal_data.kqn_eptx);
226 /**********************************************************************/
227 /* No more threads. No more portals, router or comms callbacks!
228 * I control the horizontals and the verticals...
231 /**********************************************************************/
232 /* Complete any blocked forwarding packets with error
235 while (!list_empty (&kqswnal_data.kqn_idletxd_fwdq))
237 kpr_fwd_desc_t *fwd = list_entry (kqswnal_data.kqn_idletxd_fwdq.next,
238 kpr_fwd_desc_t, kprfd_list);
239 list_del (&fwd->kprfd_list);
240 kpr_fwd_done (&kqswnal_data.kqn_router, fwd, -EHOSTUNREACH);
243 while (!list_empty (&kqswnal_data.kqn_delayedfwds))
245 kpr_fwd_desc_t *fwd = list_entry (kqswnal_data.kqn_delayedfwds.next,
246 kpr_fwd_desc_t, kprfd_list);
247 list_del (&fwd->kprfd_list);
248 kpr_fwd_done (&kqswnal_data.kqn_router, fwd, -EHOSTUNREACH);
251 /**********************************************************************/
252 /* Wait for router to complete any packets I sent her
255 kpr_deregister (&kqswnal_data.kqn_router);
258 /**********************************************************************/
259 /* Unmap message buffers and free all descriptors and buffers
262 if (kqswnal_data.kqn_eprxdmahandle != NULL)
264 elan3_dvma_unload(kqswnal_data.kqn_epdev->DmaState,
265 kqswnal_data.kqn_eprxdmahandle, 0,
266 KQSW_NRXMSGPAGES_SMALL * KQSW_NRXMSGS_SMALL +
267 KQSW_NRXMSGPAGES_LARGE * KQSW_NRXMSGS_LARGE);
269 elan3_dma_release(kqswnal_data.kqn_epdev->DmaState,
270 kqswnal_data.kqn_eprxdmahandle);
273 if (kqswnal_data.kqn_eptxdmahandle != NULL)
275 elan3_dvma_unload(kqswnal_data.kqn_epdev->DmaState,
276 kqswnal_data.kqn_eptxdmahandle, 0,
277 KQSW_NTXMSGPAGES * (KQSW_NTXMSGS +
280 elan3_dma_release(kqswnal_data.kqn_epdev->DmaState,
281 kqswnal_data.kqn_eptxdmahandle);
284 if (kqswnal_data.kqn_txds != NULL)
288 for (i = 0; i < KQSW_NTXMSGS + KQSW_NNBLK_TXMSGS; i++)
290 kqswnal_tx_t *ktx = &kqswnal_data.kqn_txds[i];
292 if (ktx->ktx_buffer != NULL)
293 PORTAL_FREE(ktx->ktx_buffer,
294 KQSW_TX_BUFFER_SIZE);
297 PORTAL_FREE(kqswnal_data.kqn_txds,
298 sizeof (kqswnal_tx_t) * (KQSW_NTXMSGS +
302 if (kqswnal_data.kqn_rxds != NULL)
307 for (i = 0; i < KQSW_NRXMSGS_SMALL + KQSW_NRXMSGS_LARGE; i++)
309 kqswnal_rx_t *krx = &kqswnal_data.kqn_rxds[i];
311 for (j = 0; j < krx->krx_npages; j++)
312 if (krx->krx_pages[j] != NULL)
313 __free_page (krx->krx_pages[j]);
316 PORTAL_FREE(kqswnal_data.kqn_rxds,
317 sizeof(kqswnal_rx_t) * (KQSW_NRXMSGS_SMALL +
318 KQSW_NRXMSGS_LARGE));
321 /* resets flags, pointers to NULL etc */
322 memset(&kqswnal_data, 0, sizeof (kqswnal_data));
324 CDEBUG (D_MALLOC, "done kmem %d\n", atomic_read(&portal_kmemory));
326 printk (KERN_INFO "Routing QSW NAL unloaded (final mem %d)\n",
327 atomic_read(&portal_kmemory));
331 kqswnal_initialise (void)
333 ELAN3_DMA_REQUEST dmareq;
337 int pkmem = atomic_read(&portal_kmemory);
339 LASSERT (kqswnal_data.kqn_init == KQN_INIT_NOTHING);
341 CDEBUG (D_MALLOC, "start kmem %d\n", atomic_read(&portal_kmemory));
343 kqswnal_api.forward = kqswnal_forward;
344 kqswnal_api.shutdown = kqswnal_shutdown;
345 kqswnal_api.yield = kqswnal_yield;
346 kqswnal_api.validate = NULL; /* our api validate is a NOOP */
347 kqswnal_api.lock = kqswnal_lock;
348 kqswnal_api.unlock = kqswnal_unlock;
349 kqswnal_api.nal_data = &kqswnal_data;
351 kqswnal_lib.nal_data = &kqswnal_data;
353 /* ensure all pointers NULL etc */
354 memset (&kqswnal_data, 0, sizeof (kqswnal_data));
356 kqswnal_data.kqn_cb = &kqswnal_lib;
358 INIT_LIST_HEAD (&kqswnal_data.kqn_idletxds);
359 INIT_LIST_HEAD (&kqswnal_data.kqn_nblk_idletxds);
360 INIT_LIST_HEAD (&kqswnal_data.kqn_activetxds);
361 spin_lock_init (&kqswnal_data.kqn_idletxd_lock);
362 init_waitqueue_head (&kqswnal_data.kqn_idletxd_waitq);
363 INIT_LIST_HEAD (&kqswnal_data.kqn_idletxd_fwdq);
365 INIT_LIST_HEAD (&kqswnal_data.kqn_delayedfwds);
366 INIT_LIST_HEAD (&kqswnal_data.kqn_delayedtxds);
367 INIT_LIST_HEAD (&kqswnal_data.kqn_readyrxds);
369 spin_lock_init (&kqswnal_data.kqn_sched_lock);
370 init_waitqueue_head (&kqswnal_data.kqn_sched_waitq);
372 spin_lock_init (&kqswnal_data.kqn_statelock);
374 /* pointers/lists/locks initialised */
375 kqswnal_data.kqn_init = KQN_INIT_DATA;
377 /**********************************************************************/
378 /* Find the first Elan device */
380 kqswnal_data.kqn_epdev = ep_device (0);
381 if (kqswnal_data.kqn_epdev == NULL)
383 CERROR ("Can't get elan device 0\n");
387 kqswnal_data.kqn_nid_offset = 0;
388 kqswnal_data.kqn_nnodes = ep_numnodes (kqswnal_data.kqn_epdev);
389 kqswnal_data.kqn_elanid = ep_nodeid (kqswnal_data.kqn_epdev);
391 /**********************************************************************/
392 /* Get the transmitter */
394 kqswnal_data.kqn_eptx = ep_alloc_large_xmtr (kqswnal_data.kqn_epdev);
395 if (kqswnal_data.kqn_eptx == NULL)
397 CERROR ("Can't allocate transmitter\n");
402 /**********************************************************************/
403 /* Get the receivers */
405 kqswnal_data.kqn_eprx_small = ep_install_large_rcvr (kqswnal_data.kqn_epdev,
406 EP_SVC_LARGE_PORTALS_SMALL,
407 KQSW_EP_ENVELOPES_SMALL);
408 if (kqswnal_data.kqn_eprx_small == NULL)
410 CERROR ("Can't install small msg receiver\n");
415 kqswnal_data.kqn_eprx_large = ep_install_large_rcvr (kqswnal_data.kqn_epdev,
416 EP_SVC_LARGE_PORTALS_LARGE,
417 KQSW_EP_ENVELOPES_LARGE);
418 if (kqswnal_data.kqn_eprx_large == NULL)
420 CERROR ("Can't install large msg receiver\n");
425 /**********************************************************************/
426 /* Reserve Elan address space for transmit buffers */
428 dmareq.Waitfn = DDI_DMA_SLEEP;
429 dmareq.ElanAddr = (E3_Addr) 0;
430 dmareq.Attr = PTE_LOAD_LITTLE_ENDIAN;
431 dmareq.Perm = ELAN_PERM_REMOTEREAD;
433 rc = elan3_dma_reserve(kqswnal_data.kqn_epdev->DmaState,
434 KQSW_NTXMSGPAGES*(KQSW_NTXMSGS+KQSW_NNBLK_TXMSGS),
435 &dmareq, &kqswnal_data.kqn_eptxdmahandle);
436 if (rc != DDI_SUCCESS)
438 CERROR ("Can't reserve rx dma space\n");
443 /**********************************************************************/
444 /* Reserve Elan address space for receive buffers */
446 dmareq.Waitfn = DDI_DMA_SLEEP;
447 dmareq.ElanAddr = (E3_Addr) 0;
448 dmareq.Attr = PTE_LOAD_LITTLE_ENDIAN;
449 dmareq.Perm = ELAN_PERM_REMOTEWRITE;
451 rc = elan3_dma_reserve (kqswnal_data.kqn_epdev->DmaState,
452 KQSW_NRXMSGPAGES_SMALL * KQSW_NRXMSGS_SMALL +
453 KQSW_NRXMSGPAGES_LARGE * KQSW_NRXMSGS_LARGE,
454 &dmareq, &kqswnal_data.kqn_eprxdmahandle);
455 if (rc != DDI_SUCCESS)
457 CERROR ("Can't reserve rx dma space\n");
462 /**********************************************************************/
463 /* Allocate/Initialise transmit descriptors */
465 PORTAL_ALLOC(kqswnal_data.kqn_txds,
466 sizeof(kqswnal_tx_t) * (KQSW_NTXMSGS + KQSW_NNBLK_TXMSGS));
467 if (kqswnal_data.kqn_txds == NULL)
473 /* clear flags, null pointers etc */
474 memset(kqswnal_data.kqn_txds, 0,
475 sizeof(kqswnal_tx_t) * (KQSW_NTXMSGS + KQSW_NNBLK_TXMSGS));
476 for (i = 0; i < (KQSW_NTXMSGS + KQSW_NNBLK_TXMSGS); i++)
479 kqswnal_tx_t *ktx = &kqswnal_data.kqn_txds[i];
480 int basepage = i * KQSW_NTXMSGPAGES;
482 PORTAL_ALLOC (ktx->ktx_buffer, KQSW_TX_BUFFER_SIZE);
483 if (ktx->ktx_buffer == NULL)
489 /* Map pre-allocated buffer NOW, to save latency on transmit */
490 premapped_pages = kqswnal_pages_spanned(ktx->ktx_buffer,
491 KQSW_TX_BUFFER_SIZE);
493 elan3_dvma_kaddr_load (kqswnal_data.kqn_epdev->DmaState,
494 kqswnal_data.kqn_eptxdmahandle,
495 ktx->ktx_buffer, KQSW_TX_BUFFER_SIZE,
496 basepage, &ktx->ktx_ebuffer);
498 ktx->ktx_basepage = basepage + premapped_pages; /* message mapping starts here */
499 ktx->ktx_npages = KQSW_NTXMSGPAGES - premapped_pages; /* for this many pages */
501 INIT_LIST_HEAD (&ktx->ktx_delayed_list);
503 ktx->ktx_isnblk = (i >= KQSW_NTXMSGS);
504 list_add_tail (&ktx->ktx_list,
505 ktx->ktx_isnblk ? &kqswnal_data.kqn_nblk_idletxds :
506 &kqswnal_data.kqn_idletxds);
509 /**********************************************************************/
510 /* Allocate/Initialise receive descriptors */
512 PORTAL_ALLOC (kqswnal_data.kqn_rxds,
513 sizeof (kqswnal_rx_t) * (KQSW_NRXMSGS_SMALL + KQSW_NRXMSGS_LARGE));
514 if (kqswnal_data.kqn_rxds == NULL)
520 memset(kqswnal_data.kqn_rxds, 0, /* clear flags, null pointers etc */
521 sizeof(kqswnal_rx_t) * (KQSW_NRXMSGS_SMALL+KQSW_NRXMSGS_LARGE));
524 for (i = 0; i < KQSW_NRXMSGS_SMALL + KQSW_NRXMSGS_LARGE; i++)
528 kqswnal_rx_t *krx = &kqswnal_data.kqn_rxds[i];
530 if (i < KQSW_NRXMSGS_SMALL)
532 krx->krx_npages = KQSW_NRXMSGPAGES_SMALL;
533 krx->krx_eprx = kqswnal_data.kqn_eprx_small;
537 krx->krx_npages = KQSW_NRXMSGPAGES_LARGE;
538 krx->krx_eprx = kqswnal_data.kqn_eprx_large;
541 LASSERT (krx->krx_npages > 0);
542 for (j = 0; j < krx->krx_npages; j++)
544 krx->krx_pages[j] = alloc_page(GFP_KERNEL);
545 if (krx->krx_pages[j] == NULL)
551 LASSERT(page_address(krx->krx_pages[j]) != NULL);
553 elan3_dvma_kaddr_load(kqswnal_data.kqn_epdev->DmaState,
554 kqswnal_data.kqn_eprxdmahandle,
555 page_address(krx->krx_pages[j]),
556 PAGE_SIZE, elan_page_idx,
561 krx->krx_elanaddr = elanaddr;
563 /* NB we assume a contiguous */
564 LASSERT (elanaddr == krx->krx_elanaddr + j * PAGE_SIZE);
567 LASSERT (elan_page_idx ==
568 (KQSW_NRXMSGS_SMALL * KQSW_NRXMSGPAGES_SMALL) +
569 (KQSW_NRXMSGS_LARGE * KQSW_NRXMSGPAGES_LARGE));
571 /**********************************************************************/
572 /* Network interface ready to initialise */
574 rc = PtlNIInit(kqswnal_init, 32, 4, 0, &kqswnal_ni);
577 CERROR ("PtlNIInit failed %d\n", rc);
582 kqswnal_data.kqn_init = KQN_INIT_PTL;
584 /**********************************************************************/
585 /* Queue receives, now that it's OK to run their completion callbacks */
587 for (i = 0; i < KQSW_NRXMSGS_SMALL + KQSW_NRXMSGS_LARGE; i++)
589 kqswnal_rx_t *krx = &kqswnal_data.kqn_rxds[i];
591 /* NB this enqueue can allocate/sleep (attr == 0) */
592 rc = ep_queue_receive(krx->krx_eprx, kqswnal_rxhandler, krx,
594 krx->krx_npages * PAGE_SIZE, 0);
597 CERROR ("failed ep_queue_receive %d\n", rc);
603 /**********************************************************************/
604 /* Spawn scheduling threads */
605 for (i = 0; i < smp_num_cpus; i++)
607 rc = kqswnal_thread_start (kqswnal_scheduler, NULL);
610 CERROR ("failed to spawn scheduling thread: %d\n", rc);
616 /**********************************************************************/
617 /* Connect to the router */
618 rc = kpr_register (&kqswnal_data.kqn_router, &kqswnal_router_interface);
619 CDEBUG(D_NET, "Can't initialise routing interface (rc = %d): not routing\n",rc);
621 rc = kportal_nal_register (QSWNAL, &kqswnal_cmd, NULL);
623 CERROR ("Can't initialise command interface (rc = %d)\n", rc);
628 PORTAL_SYMBOL_REGISTER(kqswnal_ni);
629 kqswnal_data.kqn_init = KQN_INIT_ALL;
631 printk(KERN_INFO "Routing QSW NAL loaded on node %d of %d "
632 "(Routing %s, initial mem %d)\n",
633 kqswnal_data.kqn_elanid, kqswnal_data.kqn_nnodes,
634 kpr_routing (&kqswnal_data.kqn_router) ? "enabled" : "disabled",
641 MODULE_AUTHOR("W. Marcus Miller <marcusm@llnl.gov>");
642 MODULE_DESCRIPTION("Kernel Quadrics Switch NAL v1.00");
643 MODULE_LICENSE("GPL");
645 module_init (kqswnal_initialise);
646 module_exit (kqswnal_finalise);
648 EXPORT_SYMBOL (kqswnal_ni);