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,
39 kqswnal_forward(nal_t *nal,
41 void *args, size_t args_len,
42 void *ret, size_t ret_len)
44 kqswnal_data_t *k = nal->nal_data;
45 nal_cb_t *nal_cb = k->kqn_cb;
47 LASSERT (nal == &kqswnal_api);
48 LASSERT (k == &kqswnal_data);
49 LASSERT (nal_cb == &kqswnal_lib);
51 lib_dispatch(nal_cb, k, id, args, ret); /* nal needs k */
56 kqswnal_lock (nal_t *nal, unsigned long *flags)
58 kqswnal_data_t *k = nal->nal_data;
59 nal_cb_t *nal_cb = k->kqn_cb;
61 LASSERT (nal == &kqswnal_api);
62 LASSERT (k == &kqswnal_data);
63 LASSERT (nal_cb == &kqswnal_lib);
65 nal_cb->cb_cli(nal_cb,flags);
69 kqswnal_unlock(nal_t *nal, unsigned long *flags)
71 kqswnal_data_t *k = nal->nal_data;
72 nal_cb_t *nal_cb = k->kqn_cb;
74 LASSERT (nal == &kqswnal_api);
75 LASSERT (k == &kqswnal_data);
76 LASSERT (nal_cb == &kqswnal_lib);
78 nal_cb->cb_sti(nal_cb,flags);
82 kqswnal_shutdown(nal_t *nal, int ni)
84 CDEBUG (D_NET, "shutdown\n");
86 LASSERT (nal == &kqswnal_api);
91 kqswnal_yield( nal_t *nal )
93 CDEBUG (D_NET, "yield\n");
95 if (current->need_resched)
101 kqswnal_init(int interface, ptl_pt_index_t ptl_size, ptl_ac_index_t ac_size,
102 ptl_pid_t requested_pid)
104 ptl_nid_t mynid = kqswnal_elanid2nid (kqswnal_data.kqn_elanid);
105 int nnids = kqswnal_data.kqn_nnodes;
107 CDEBUG(D_NET, "calling lib_init with nid "LPX64" of %d\n", mynid, nnids);
109 lib_init(&kqswnal_lib, mynid, 0, nnids, ptl_size, ac_size);
111 return (&kqswnal_api);
115 kqswnal_get_tx_desc (struct portal_ioctl_data *data)
118 struct list_head *tmp;
120 int index = data->ioc_count;
123 spin_lock_irqsave (&kqswnal_data.kqn_idletxd_lock, flags);
125 list_for_each (tmp, &kqswnal_data.kqn_activetxds) {
129 ktx = list_entry (tmp, kqswnal_tx_t, ktx_list);
131 data->ioc_pbuf1 = (char *)ktx;
132 data->ioc_count = NTOH__u32(ktx->ktx_wire_hdr->type);
133 data->ioc_size = NTOH__u32(PTL_HDR_LENGTH(ktx->ktx_wire_hdr));
134 data->ioc_nid = NTOH__u64(ktx->ktx_wire_hdr->dest_nid);
135 data->ioc_nid2 = ktx->ktx_nid;
136 data->ioc_misc = ktx->ktx_launcher;
137 data->ioc_flags = (list_empty (&ktx->ktx_delayed_list) ? 0 : 1) |
138 ((!ktx->ktx_forwarding) ? 0 : 2) |
139 ((!ktx->ktx_isnblk) ? 0 : 4);
145 spin_unlock_irqrestore (&kqswnal_data.kqn_idletxd_lock, flags);
150 kqswnal_cmd (struct portal_ioctl_data *data, void *private)
152 LASSERT (data != NULL);
154 switch (data->ioc_nal_cmd) {
155 case NAL_CMD_GET_TXDESC:
156 return (kqswnal_get_tx_desc (data));
158 case NAL_CMD_REGISTER_MYNID:
159 CDEBUG (D_IOCTL, "setting NID offset to "LPX64" (was "LPX64")\n",
160 data->ioc_nid - kqswnal_data.kqn_elanid,
161 kqswnal_data.kqn_nid_offset);
162 kqswnal_data.kqn_nid_offset =
163 data->ioc_nid - kqswnal_data.kqn_elanid;
164 kqswnal_lib.ni.nid = data->ioc_nid;
173 kqswnal_finalise (void)
175 switch (kqswnal_data.kqn_init)
181 PORTAL_SYMBOL_UNREGISTER (kqswnal_ni);
185 PtlNIFini (kqswnal_ni);
186 lib_fini (&kqswnal_lib);
192 case KQN_INIT_NOTHING:
196 /**********************************************************************/
197 /* Make router stop her calling me and fail any more call-ins */
198 kpr_shutdown (&kqswnal_data.kqn_router);
200 /**********************************************************************/
201 /* flag threads to terminate, wake them and wait for them to die */
203 kqswnal_data.kqn_shuttingdown = 1;
204 wake_up_all (&kqswnal_data.kqn_sched_waitq);
206 while (atomic_read (&kqswnal_data.kqn_nthreads) != 0) {
207 CDEBUG(D_NET, "waiting for %d threads to terminate\n",
208 atomic_read (&kqswnal_data.kqn_nthreads));
209 set_current_state (TASK_UNINTERRUPTIBLE);
210 schedule_timeout (HZ);
213 /**********************************************************************/
214 /* close elan comms */
216 if (kqswnal_data.kqn_eprx_small != NULL)
217 ep_remove_large_rcvr (kqswnal_data.kqn_eprx_small);
219 if (kqswnal_data.kqn_eprx_large != NULL)
220 ep_remove_large_rcvr (kqswnal_data.kqn_eprx_large);
222 if (kqswnal_data.kqn_eptx != NULL)
223 ep_free_large_xmtr (kqswnal_data.kqn_eptx);
225 /**********************************************************************/
226 /* No more threads. No more portals, router or comms callbacks!
227 * I control the horizontals and the verticals...
230 /**********************************************************************/
231 /* Complete any blocked forwarding packets with error
234 while (!list_empty (&kqswnal_data.kqn_idletxd_fwdq))
236 kpr_fwd_desc_t *fwd = list_entry (kqswnal_data.kqn_idletxd_fwdq.next,
237 kpr_fwd_desc_t, kprfd_list);
238 list_del (&fwd->kprfd_list);
239 kpr_fwd_done (&kqswnal_data.kqn_router, fwd, -EHOSTUNREACH);
242 while (!list_empty (&kqswnal_data.kqn_delayedfwds))
244 kpr_fwd_desc_t *fwd = list_entry (kqswnal_data.kqn_delayedfwds.next,
245 kpr_fwd_desc_t, kprfd_list);
246 list_del (&fwd->kprfd_list);
247 kpr_fwd_done (&kqswnal_data.kqn_router, fwd, -EHOSTUNREACH);
250 /**********************************************************************/
251 /* Wait for router to complete any packets I sent her
254 kpr_deregister (&kqswnal_data.kqn_router);
257 /**********************************************************************/
258 /* Unmap message buffers and free all descriptors and buffers
261 if (kqswnal_data.kqn_eprxdmahandle != NULL)
263 elan3_dvma_unload(kqswnal_data.kqn_epdev->DmaState,
264 kqswnal_data.kqn_eprxdmahandle, 0,
265 KQSW_NRXMSGPAGES_SMALL * KQSW_NRXMSGS_SMALL +
266 KQSW_NRXMSGPAGES_LARGE * KQSW_NRXMSGS_LARGE);
268 elan3_dma_release(kqswnal_data.kqn_epdev->DmaState,
269 kqswnal_data.kqn_eprxdmahandle);
272 if (kqswnal_data.kqn_eptxdmahandle != NULL)
274 elan3_dvma_unload(kqswnal_data.kqn_epdev->DmaState,
275 kqswnal_data.kqn_eptxdmahandle, 0,
276 KQSW_NTXMSGPAGES * (KQSW_NTXMSGS +
279 elan3_dma_release(kqswnal_data.kqn_epdev->DmaState,
280 kqswnal_data.kqn_eptxdmahandle);
283 if (kqswnal_data.kqn_txds != NULL)
287 for (i = 0; i < KQSW_NTXMSGS + KQSW_NNBLK_TXMSGS; i++)
289 kqswnal_tx_t *ktx = &kqswnal_data.kqn_txds[i];
291 if (ktx->ktx_buffer != NULL)
292 PORTAL_FREE(ktx->ktx_buffer,
293 KQSW_TX_BUFFER_SIZE);
296 PORTAL_FREE(kqswnal_data.kqn_txds,
297 sizeof (kqswnal_tx_t) * (KQSW_NTXMSGS +
301 if (kqswnal_data.kqn_rxds != NULL)
306 for (i = 0; i < KQSW_NRXMSGS_SMALL + KQSW_NRXMSGS_LARGE; i++)
308 kqswnal_rx_t *krx = &kqswnal_data.kqn_rxds[i];
310 for (j = 0; j < krx->krx_npages; j++)
311 if (krx->krx_pages[j] != NULL)
312 __free_page (krx->krx_pages[j]);
315 PORTAL_FREE(kqswnal_data.kqn_rxds,
316 sizeof(kqswnal_rx_t) * (KQSW_NRXMSGS_SMALL +
317 KQSW_NRXMSGS_LARGE));
320 /* resets flags, pointers to NULL etc */
321 memset(&kqswnal_data, 0, sizeof (kqswnal_data));
323 CDEBUG (D_MALLOC, "done kmem %d\n", atomic_read(&portal_kmemory));
325 printk (KERN_INFO "Routing QSW NAL unloaded (final mem %d)\n",
326 atomic_read(&portal_kmemory));
330 kqswnal_initialise (void)
332 ELAN3_DMA_REQUEST dmareq;
336 int pkmem = atomic_read(&portal_kmemory);
338 LASSERT (kqswnal_data.kqn_init == KQN_INIT_NOTHING);
340 CDEBUG (D_MALLOC, "start kmem %d\n", atomic_read(&portal_kmemory));
342 kqswnal_api.forward = kqswnal_forward;
343 kqswnal_api.shutdown = kqswnal_shutdown;
344 kqswnal_api.yield = kqswnal_yield;
345 kqswnal_api.validate = NULL; /* our api validate is a NOOP */
346 kqswnal_api.lock = kqswnal_lock;
347 kqswnal_api.unlock = kqswnal_unlock;
348 kqswnal_api.nal_data = &kqswnal_data;
350 kqswnal_lib.nal_data = &kqswnal_data;
352 /* ensure all pointers NULL etc */
353 memset (&kqswnal_data, 0, sizeof (kqswnal_data));
355 kqswnal_data.kqn_cb = &kqswnal_lib;
357 INIT_LIST_HEAD (&kqswnal_data.kqn_idletxds);
358 INIT_LIST_HEAD (&kqswnal_data.kqn_nblk_idletxds);
359 INIT_LIST_HEAD (&kqswnal_data.kqn_activetxds);
360 spin_lock_init (&kqswnal_data.kqn_idletxd_lock);
361 init_waitqueue_head (&kqswnal_data.kqn_idletxd_waitq);
362 INIT_LIST_HEAD (&kqswnal_data.kqn_idletxd_fwdq);
364 INIT_LIST_HEAD (&kqswnal_data.kqn_delayedfwds);
365 INIT_LIST_HEAD (&kqswnal_data.kqn_delayedtxds);
366 INIT_LIST_HEAD (&kqswnal_data.kqn_readyrxds);
368 spin_lock_init (&kqswnal_data.kqn_sched_lock);
369 init_waitqueue_head (&kqswnal_data.kqn_sched_waitq);
371 spin_lock_init (&kqswnal_data.kqn_statelock);
373 /* pointers/lists/locks initialised */
374 kqswnal_data.kqn_init = KQN_INIT_DATA;
376 /**********************************************************************/
377 /* Find the first Elan device */
379 kqswnal_data.kqn_epdev = ep_device (0);
380 if (kqswnal_data.kqn_epdev == NULL)
382 CERROR ("Can't get elan device 0\n");
386 kqswnal_data.kqn_nid_offset = 0;
387 kqswnal_data.kqn_nnodes = ep_numnodes (kqswnal_data.kqn_epdev);
388 kqswnal_data.kqn_elanid = ep_nodeid (kqswnal_data.kqn_epdev);
390 /**********************************************************************/
391 /* Get the transmitter */
393 kqswnal_data.kqn_eptx = ep_alloc_large_xmtr (kqswnal_data.kqn_epdev);
394 if (kqswnal_data.kqn_eptx == NULL)
396 CERROR ("Can't allocate transmitter\n");
401 /**********************************************************************/
402 /* Get the receivers */
404 kqswnal_data.kqn_eprx_small = ep_install_large_rcvr (kqswnal_data.kqn_epdev,
405 EP_SVC_LARGE_PORTALS_SMALL,
406 KQSW_EP_ENVELOPES_SMALL);
407 if (kqswnal_data.kqn_eprx_small == NULL)
409 CERROR ("Can't install small msg receiver\n");
414 kqswnal_data.kqn_eprx_large = ep_install_large_rcvr (kqswnal_data.kqn_epdev,
415 EP_SVC_LARGE_PORTALS_LARGE,
416 KQSW_EP_ENVELOPES_LARGE);
417 if (kqswnal_data.kqn_eprx_large == NULL)
419 CERROR ("Can't install large msg receiver\n");
424 /**********************************************************************/
425 /* Reserve Elan address space for transmit buffers */
427 dmareq.Waitfn = DDI_DMA_SLEEP;
428 dmareq.ElanAddr = (E3_Addr) 0;
429 dmareq.Attr = PTE_LOAD_LITTLE_ENDIAN;
430 dmareq.Perm = ELAN_PERM_REMOTEREAD;
432 rc = elan3_dma_reserve(kqswnal_data.kqn_epdev->DmaState,
433 KQSW_NTXMSGPAGES*(KQSW_NTXMSGS+KQSW_NNBLK_TXMSGS),
434 &dmareq, &kqswnal_data.kqn_eptxdmahandle);
435 if (rc != DDI_SUCCESS)
437 CERROR ("Can't reserve rx dma space\n");
442 /**********************************************************************/
443 /* Reserve Elan address space for receive buffers */
445 dmareq.Waitfn = DDI_DMA_SLEEP;
446 dmareq.ElanAddr = (E3_Addr) 0;
447 dmareq.Attr = PTE_LOAD_LITTLE_ENDIAN;
448 dmareq.Perm = ELAN_PERM_REMOTEWRITE;
450 rc = elan3_dma_reserve (kqswnal_data.kqn_epdev->DmaState,
451 KQSW_NRXMSGPAGES_SMALL * KQSW_NRXMSGS_SMALL +
452 KQSW_NRXMSGPAGES_LARGE * KQSW_NRXMSGS_LARGE,
453 &dmareq, &kqswnal_data.kqn_eprxdmahandle);
454 if (rc != DDI_SUCCESS)
456 CERROR ("Can't reserve rx dma space\n");
461 /**********************************************************************/
462 /* Allocate/Initialise transmit descriptors */
464 PORTAL_ALLOC(kqswnal_data.kqn_txds,
465 sizeof(kqswnal_tx_t) * (KQSW_NTXMSGS + KQSW_NNBLK_TXMSGS));
466 if (kqswnal_data.kqn_txds == NULL)
472 /* clear flags, null pointers etc */
473 memset(kqswnal_data.kqn_txds, 0,
474 sizeof(kqswnal_tx_t) * (KQSW_NTXMSGS + KQSW_NNBLK_TXMSGS));
475 for (i = 0; i < (KQSW_NTXMSGS + KQSW_NNBLK_TXMSGS); i++)
478 kqswnal_tx_t *ktx = &kqswnal_data.kqn_txds[i];
479 int basepage = i * KQSW_NTXMSGPAGES;
481 PORTAL_ALLOC (ktx->ktx_buffer, KQSW_TX_BUFFER_SIZE);
482 if (ktx->ktx_buffer == NULL)
488 /* Map pre-allocated buffer NOW, to save latency on transmit */
489 premapped_pages = kqswnal_pages_spanned(ktx->ktx_buffer,
490 KQSW_TX_BUFFER_SIZE);
492 elan3_dvma_kaddr_load (kqswnal_data.kqn_epdev->DmaState,
493 kqswnal_data.kqn_eptxdmahandle,
494 ktx->ktx_buffer, KQSW_TX_BUFFER_SIZE,
495 basepage, &ktx->ktx_ebuffer);
497 ktx->ktx_basepage = basepage + premapped_pages; /* message mapping starts here */
498 ktx->ktx_npages = KQSW_NTXMSGPAGES - premapped_pages; /* for this many pages */
500 INIT_LIST_HEAD (&ktx->ktx_delayed_list);
502 ktx->ktx_isnblk = (i >= KQSW_NTXMSGS);
503 list_add_tail (&ktx->ktx_list,
504 ktx->ktx_isnblk ? &kqswnal_data.kqn_nblk_idletxds :
505 &kqswnal_data.kqn_idletxds);
508 /**********************************************************************/
509 /* Allocate/Initialise receive descriptors */
511 PORTAL_ALLOC (kqswnal_data.kqn_rxds,
512 sizeof (kqswnal_rx_t) * (KQSW_NRXMSGS_SMALL + KQSW_NRXMSGS_LARGE));
513 if (kqswnal_data.kqn_rxds == NULL)
519 memset(kqswnal_data.kqn_rxds, 0, /* clear flags, null pointers etc */
520 sizeof(kqswnal_rx_t) * (KQSW_NRXMSGS_SMALL+KQSW_NRXMSGS_LARGE));
523 for (i = 0; i < KQSW_NRXMSGS_SMALL + KQSW_NRXMSGS_LARGE; i++)
527 kqswnal_rx_t *krx = &kqswnal_data.kqn_rxds[i];
529 if (i < KQSW_NRXMSGS_SMALL)
531 krx->krx_npages = KQSW_NRXMSGPAGES_SMALL;
532 krx->krx_eprx = kqswnal_data.kqn_eprx_small;
536 krx->krx_npages = KQSW_NRXMSGPAGES_LARGE;
537 krx->krx_eprx = kqswnal_data.kqn_eprx_large;
540 LASSERT (krx->krx_npages > 0);
541 for (j = 0; j < krx->krx_npages; j++)
543 krx->krx_pages[j] = alloc_page(GFP_KERNEL);
544 if (krx->krx_pages[j] == NULL)
550 LASSERT(page_address(krx->krx_pages[j]) != NULL);
552 elan3_dvma_kaddr_load(kqswnal_data.kqn_epdev->DmaState,
553 kqswnal_data.kqn_eprxdmahandle,
554 page_address(krx->krx_pages[j]),
555 PAGE_SIZE, elan_page_idx,
560 krx->krx_elanaddr = elanaddr;
562 /* NB we assume a contiguous */
563 LASSERT (elanaddr == krx->krx_elanaddr + j * PAGE_SIZE);
566 LASSERT (elan_page_idx ==
567 (KQSW_NRXMSGS_SMALL * KQSW_NRXMSGPAGES_SMALL) +
568 (KQSW_NRXMSGS_LARGE * KQSW_NRXMSGPAGES_LARGE));
570 /**********************************************************************/
571 /* Network interface ready to initialise */
573 rc = PtlNIInit(kqswnal_init, 32, 4, 0, &kqswnal_ni);
576 CERROR ("PtlNIInit failed %d\n", rc);
581 kqswnal_data.kqn_init = KQN_INIT_PTL;
583 /**********************************************************************/
584 /* Queue receives, now that it's OK to run their completion callbacks */
586 for (i = 0; i < KQSW_NRXMSGS_SMALL + KQSW_NRXMSGS_LARGE; i++)
588 kqswnal_rx_t *krx = &kqswnal_data.kqn_rxds[i];
590 /* NB this enqueue can allocate/sleep (attr == 0) */
591 rc = ep_queue_receive(krx->krx_eprx, kqswnal_rxhandler, krx,
593 krx->krx_npages * PAGE_SIZE, 0);
596 CERROR ("failed ep_queue_receive %d\n", rc);
602 /**********************************************************************/
603 /* Spawn scheduling threads */
604 for (i = 0; i < smp_num_cpus; i++)
606 rc = kqswnal_thread_start (kqswnal_scheduler, NULL);
609 CERROR ("failed to spawn scheduling thread: %d\n", rc);
615 /**********************************************************************/
616 /* Connect to the router */
617 rc = kpr_register (&kqswnal_data.kqn_router, &kqswnal_router_interface);
618 CDEBUG(D_NET, "Can't initialise routing interface (rc = %d): not routing\n",rc);
620 rc = kportal_nal_register (QSWNAL, &kqswnal_cmd, NULL);
622 CERROR ("Can't initialise command interface (rc = %d)\n", rc);
627 PORTAL_SYMBOL_REGISTER(kqswnal_ni);
628 kqswnal_data.kqn_init = KQN_INIT_ALL;
630 printk(KERN_INFO "Routing QSW NAL loaded on node %d of %d "
631 "(Routing %s, initial mem %d)\n",
632 kqswnal_data.kqn_elanid, kqswnal_data.kqn_nnodes,
633 kpr_routing (&kqswnal_data.kqn_router) ? "enabled" : "disabled",
640 MODULE_AUTHOR("W. Marcus Miller <marcusm@llnl.gov>");
641 MODULE_DESCRIPTION("Kernel Quadrics Switch NAL v1.00");
642 MODULE_LICENSE("GPL");
644 module_init (kqswnal_initialise);
645 module_exit (kqswnal_finalise);
647 EXPORT_SYMBOL (kqswnal_ni);