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source: trunk/kernel/fs/devfs.c @ 675

Last change on this file since 675 was 673, checked in by alain, 4 years ago
Introduce the DEBUG_VFS_ERROR in kernel_config to make error messges display conditional.
File size: 28.6 KB

Line
1	/*
2	* devfs.c - DEVFS File system API implementation.
3	*
4	* Author Mohamed Lamine Karaoui (2014,2015)
5	* Alain Greiner (2016,2017,2018,2019,2020)
6	*
7	* Copyright (c) Sorbonne Universites
8	*
9	* This file is part of ALMOS-MKH.
10	*
11	* ALMOS-MKH is free software; you can redistribute it and/or modify it
12	* under the terms of the GNU General Public License as published by
13	* the Free Software Foundation; version 2.0 of the License.
14	*
15	* ALMOS-MKH is distributed in the hope that it will be useful, but
16	* WITHOUT ANY WARRANTY; without even the implied warranty of
17	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
18	* General Public License for more details.
19	*
20	* You should have received a copy of the GNU General Public License
21	* along with ALMOS-MKH; if not, write to the Free Software Foundation,
22	* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
23	*/
24
25	#include <hal_kernel_types.h>
26	#include <hal_special.h>
27	#include <hal_uspace.h>
28	#include <printk.h>
29	#include <string.h>
30	#include <chdev.h>
31	#include <thread.h>
32	#include <dev_txt.h>
33	#include <cluster.h>
34	#include <vfs.h>
35	#include <kmem.h>
36	#include <devfs.h>
37
38	/////////////////////////////////////////////////////////////////////////////////////////
39	// Extern variables
40	/////////////////////////////////////////////////////////////////////////////////////////
41
42	extern vfs_ctx_t fs_context[]; // allocated in kernel_init.c
43	extern chdev_directory_t chdev_dir; // allocated in kernel_init.c
44
45	#if (DEBUG_SYS_READ & 1)
46	extern uint32_t enter_devfs_read;
47	extern uint32_t exit_devfs_read;
48	#endif
49
50	#if (DEBUG_SYS_WRITE & 1)
51	extern uint32_t enter_devfs_write;
52	extern uint32_t exit_devfs_write;
53	#endif
54
55	///////////////////////////////////
56	xptr_t devfs_ctx_alloc( cxy_t cxy )
57	{
58	kmem_req_t req;
59
60	req.type = KMEM_KCM;
61	req.order = bits_log2( sizeof(devfs_ctx_t) );
62	req.flags = AF_KERNEL \| AF_ZERO;
63
64	// allocates devfs context from target cluster
65	return XPTR( cxy , kmem_remote_alloc( cxy , &req ) );
66	}
67
68	/////////////////////////////////////////////
69	void devfs_ctx_init( xptr_t devfs_ctx_xp,
70	xptr_t devfs_dev_inode_xp,
71	xptr_t devfs_external_inode_xp )
72	{
73	// get cluster and local pointer on remote devfs context
74	devfs_ctx_t * devfs_ctx_ptr = GET_PTR( devfs_ctx_xp );
75	cxy_t devfs_ctx_cxy = GET_CXY( devfs_ctx_xp );
76
77	// set values in remote devfs context
78	hal_remote_s64( XPTR( devfs_ctx_cxy , &devfs_ctx_ptr->dev_inode_xp ),
79	devfs_dev_inode_xp );
80
81	hal_remote_s64( XPTR( devfs_ctx_cxy , &devfs_ctx_ptr->external_inode_xp ),
82	devfs_external_inode_xp );
83
84	// register devfs context in the remote fs_context array[]
85	hal_remote_spt( XPTR( devfs_ctx_cxy , &fs_context[FS_TYPE_DEVFS].extend ),
86	devfs_ctx_ptr );
87	}
88
89	//////////////////////////////////////////////
90	void devfs_ctx_destroy( xptr_t devfs_ctx_xp )
91	{
92	kmem_req_t req;
93
94	// get cluster and local pointer on devfs context
95	devfs_ctx_t * devfs_ctx_ptr = GET_PTR( devfs_ctx_xp );
96	cxy_t devfs_ctx_cxy = GET_CXY( devfs_ctx_xp );
97
98	req.type = KMEM_KCM;
99	req.ptr = devfs_ctx_ptr;
100
101	// release devfs context descriptor to remote cluster
102	kmem_remote_free( devfs_ctx_cxy , &req );
103	}
104
105	/////////////////////////////////////////////////
106	void devfs_global_init( xptr_t root_inode_xp,
107	xptr_t * devfs_dev_inode_xp,
108	xptr_t * devfs_external_inode_xp )
109	{
110	error_t error;
111	xptr_t unused_xp; // required by vfs_add_child_in_parent()
112	vfs_inode_t * inode;
113
114	// get
115
116	// create DEVFS "dev" inode in cluster 0
117	error = vfs_add_child_in_parent( 0, // cxy
118	FS_TYPE_DEVFS,
119	root_inode_xp,
120	"dev",
121	&unused_xp,
122	devfs_dev_inode_xp );
123
124	// update inode "type" field
125	inode = GET_PTR( *devfs_dev_inode_xp );
126	inode->type = FILE_TYPE_DIR;
127
128	// create dentries <.> and <..> in <dev>
129	error \|= vfs_add_special_dentries( *devfs_dev_inode_xp,
130	root_inode_xp );
131
132	if( error )
133	{
134	printk("\n[PANIC] in %s : cannot create <dev> directory\n", __FUNCTION__ );
135	hal_core_sleep();
136	}
137
138	#if DEBUG_DEVFS_GLOBAL_INIT
139	uint32_t cycle = (uint32_t)hal_get_cycles();
140	thread_t * this = CURRENT_THREAD;
141	if( DEBUG_DEVFS_GLOBAL_INIT < cycle )
142	printk("\n[%s] thread[%x,%x] created <dev> inode / cycle %d\n",
143	__FUNCTION__, this->process->pid, this->trdid, cycle );
144	#endif
145
146	// create DEVFS "external" inode in cluster 0
147	error = vfs_add_child_in_parent( 0, // cxy
148	FS_TYPE_DEVFS,
149	*devfs_dev_inode_xp,
150	"external",
151	&unused_xp,
152	devfs_external_inode_xp );
153
154	// update inode "type" field
155	inode = GET_PTR( *devfs_external_inode_xp );
156	inode->type = FILE_TYPE_DIR;
157
158	// create dentries <.> and <..> in <external>
159	error \|= vfs_add_special_dentries( *devfs_external_inode_xp,
160	*devfs_dev_inode_xp );
161
162	if( error )
163	{
164	printk("\n[PANIC] in %s : cannot create <external> directory\n", __FUNCTION__ );
165	hal_core_sleep();
166	}
167
168	#if DEBUG_DEVFS_GLOBAL_INIT
169	cycle = (uint32_t)hal_get_cycles();
170	if( DEBUG_DEVFS_GLOBAL_INIT < cycle )
171	printk("\n[%s] thread[%x,%x] created <external> inode / cycle %d\n",
172	__FUNCTION__, this->process->pid, this->trdid, cycle );
173	#endif
174
175	} // end devfs_global_init()
176
177	///////////////////////////////////////////////////
178	void devfs_local_init( xptr_t devfs_dev_inode_xp,
179	xptr_t devfs_external_inode_xp )
180	{
181	xptr_t internal_inode_xp; // extended pointer on <internal> inode
182	vfs_inode_t * internal_inode_ptr; // local pointer on <internal> inode
183	char node_name[16];
184	xptr_t chdev_xp;
185	cxy_t chdev_cxy;
186	chdev_t * chdev_ptr;
187	xptr_t inode_xp;
188	vfs_inode_t * inode_ptr;
189	uint32_t channel;
190	xptr_t unused_xp; // required by add_child_in_parent()
191	error_t error;
192
193
194	#if DEBUG_DEVFS_LOCAL_INIT
195	uint32_t cycle = (uint32_t)hal_get_cycles();
196	thread_t * this = CURRENT_THREAD;
197	if( DEBUG_DEVFS_LOCAL_INIT < cycle )
198	printk("\n[%s] thread[%x,%x] enter / cycle %d\n",
199	__FUNCTION__, this->process->pid, this->trdid, cycle );
200	#endif
201
202	// create <internal> directory
203	snprintk( node_name , 16 , "internal_%x" , local_cxy );
204
205	error = vfs_add_child_in_parent( local_cxy, // target cluster
206	FS_TYPE_DEVFS, // FS type
207	devfs_dev_inode_xp, // parent inode
208	node_name, // child name
209	&unused_xp,
210	&internal_inode_xp ); // child inode
211
212	// set <internal> inode "type" field
213	internal_inode_ptr = GET_PTR( internal_inode_xp );
214	internal_inode_ptr->type = FILE_TYPE_DEV;
215
216	// create dentries <.> and <..> in <internal>
217	error \|= vfs_add_special_dentries( internal_inode_xp,
218	devfs_dev_inode_xp );
219
220	if( error )
221	{
222	printk("\n[PANIC] in %s : cannot create <internal> directory\n", __FUNCTION__ );
223	hal_core_sleep();
224	}
225
226	#if DEBUG_DEVFS_LOCAL_INIT
227	cycle = (uint32_t)hal_get_cycles();
228	if( DEBUG_DEVFS_LOCAL_INIT < cycle )
229	printk("\n[%s] thread[%x,%x] created <%s> inode in cluster %x / cycle %d\n",
230	__FUNCTION__, this->process->pid, this->trdid, node_name, local_cxy, cycle );
231	#endif
232
233	// create MMC chdev inode
234	chdev_xp = chdev_dir.mmc[local_cxy];
235	if( chdev_xp != XPTR_NULL)
236	{
237	chdev_ptr = GET_PTR( chdev_xp );
238	chdev_cxy = GET_CXY( chdev_xp );
239
240	if( chdev_cxy != local_cxy )
241	{
242	printk("\n[PANIC] in %s : illegal MMC chdev in cluster %x\n",
243	__FUNCTION__, local_cxy );
244	hal_core_sleep();
245	}
246
247	error = vfs_add_child_in_parent( local_cxy,
248	FS_TYPE_DEVFS,
249	internal_inode_xp,
250	chdev_ptr->name,
251	&unused_xp,
252	&inode_xp );
253
254	if( error )
255	{
256	printk("\n[PANIC] in %s : cannot create MMC inode in cluster %x\n",
257	__FUNCTION__, local_cxy );
258	hal_core_sleep();
259	}
260
261	// update child inode "extend" and "type" fields
262	inode_ptr = GET_PTR( inode_xp );
263	inode_ptr->extend = chdev_ptr;
264	inode_ptr->type = FILE_TYPE_DEV;
265
266	#if DEBUG_DEVFS_LOCAL_INIT
267	cycle = (uint32_t)hal_get_cycles();
268	if( DEBUG_DEVFS_LOCAL_INIT < cycle )
269	printk("\n[%s] thread[%x,%x] created <mmc> inode in cluster %x\n",
270	__FUNCTION__, this->process->pid, this->trdid, local_cxy, cycle );
271	#endif
272
273	}
274
275	// create DMA chdev inodes (one DMA channel per core)
276	for( channel = 0 ; channel < LOCAL_CLUSTER->cores_nr ; channel++ )
277	{
278	chdev_xp = chdev_dir.dma[channel];
279	if( chdev_xp != XPTR_NULL)
280	{
281	chdev_ptr = GET_PTR( chdev_xp );
282	chdev_cxy = GET_CXY( chdev_xp );
283
284	if( chdev_cxy != local_cxy )
285	{
286	printk("\n[PANIC] in %s : illegal DMA chdev in cluster %x\n",
287	__FUNCTION__, local_cxy );
288	hal_core_sleep();
289	}
290
291	error = vfs_add_child_in_parent( local_cxy,
292	FS_TYPE_DEVFS,
293	internal_inode_xp,
294	chdev_ptr->name,
295	&unused_xp,
296	&inode_xp );
297	if( error )
298	{
299	printk("\n[PANIC] in %s : cannot create DMA inode in cluster %x\n",
300	__FUNCTION__, local_cxy );
301	hal_core_sleep();
302	}
303
304	// update child inode "extend" and "type" fields
305	inode_ptr = GET_PTR( inode_xp );
306	inode_ptr->extend = chdev_ptr;
307	inode_ptr->type = FILE_TYPE_DEV;
308
309	#if DEBUG_DEVFS_LOCAL_INIT
310	cycle = (uint32_t)hal_get_cycles();
311	if( DEBUG_DEVFS_LOCAL_INIT < cycle )
312	printk("\n[%s] thread [%x,%x] created <dma[%d]> inode in cluster %x\n",
313	__FUNCTION__, this->process->pid, this->trdid, channel, local_cxy, cycle );
314	#endif
315	}
316	}
317
318	// create an IOB inode in cluster containing IOB chdev
319	chdev_xp = chdev_dir.iob;
320	if( chdev_xp != XPTR_NULL )
321	{
322	chdev_cxy = GET_CXY( chdev_xp );
323	chdev_ptr = GET_PTR( chdev_xp );
324
325	if( chdev_cxy == local_cxy )
326	{
327	error = vfs_add_child_in_parent( local_cxy,
328	FS_TYPE_DEVFS,
329	devfs_external_inode_xp,
330	chdev_ptr->name,
331	&unused_xp,
332	&inode_xp );
333	if( error )
334	{
335	printk("\n[PANIC] in %s : cannot create IOB inode in cluster %x\n",
336	__FUNCTION__, local_cxy );
337	hal_core_sleep();
338	}
339
340	// update child inode "extend" and "type" fields
341	inode_ptr = GET_PTR( inode_xp );
342	inode_ptr->extend = chdev_ptr;
343	inode_ptr->type = FILE_TYPE_DEV;
344
345	#if DEBUG_DEVFS_LOCAL_INIT
346	cycle = (uint32_t)hal_get_cycles();
347	if( DEBUG_DEVFS_LOCAL_INIT < cycle )
348	printk("\n[%s] thread[%x,%x] created <iob> inode in cluster %x\n",
349	__FUNCTION__, this->process->pid, this->trdid, local_cxy, cycle );
350	#endif
351	}
352	}
353
354	// create a PIC inode in cluster containing PIC chdev
355	chdev_xp = chdev_dir.pic;
356	if( chdev_xp != XPTR_NULL )
357	{
358	chdev_cxy = GET_CXY( chdev_xp );
359	chdev_ptr = GET_PTR( chdev_xp );
360
361	if( chdev_cxy == local_cxy )
362	{
363	error = vfs_add_child_in_parent( local_cxy,
364	FS_TYPE_DEVFS,
365	devfs_external_inode_xp,
366	chdev_ptr->name,
367	&unused_xp,
368	&inode_xp );
369
370	if( error )
371	{
372	printk("\n[PANIC] in %s : cannot create PIC inode in cluster %x\n",
373	__FUNCTION__, local_cxy );
374	hal_core_sleep();
375	}
376
377	// update child inode "extend" field
378	inode_ptr = GET_PTR( inode_xp );
379	inode_ptr->extend = chdev_ptr;
380	inode_ptr->type = FILE_TYPE_DEV;
381
382	#if DEBUG_DEVFS_LOCAL_INIT
383	cycle = (uint32_t)hal_get_cycles();
384	if( DEBUG_DEVFS_LOCAL_INIT < cycle )
385	printk("\n[%s] thread[%x,%x] created <pic> inode in cluster %x\n",
386	__FUNCTION__, this->process->pid, this->trdid, local_cxy, cycle );
387	#endif
388	}
389	}
390
391	// create a TXT_RX inode in each cluster containing a TXT_RX chdev
392	for( channel = 0 ; channel < CONFIG_MAX_TXT_CHANNELS ; channel++ )
393	{
394	chdev_xp = chdev_dir.txt_rx[channel];
395	if( chdev_xp != XPTR_NULL )
396	{
397	chdev_cxy = GET_CXY( chdev_xp );
398	chdev_ptr = GET_PTR( chdev_xp );
399
400	if( chdev_cxy == local_cxy )
401	{
402	error = vfs_add_child_in_parent( local_cxy,
403	FS_TYPE_DEVFS,
404	devfs_external_inode_xp,
405	chdev_ptr->name,
406	&unused_xp,
407	&inode_xp );
408
409	if( error )
410	{
411	printk("\n[PANIC] in %s : cannot create TXT_RX inode in cluster %x\n",
412	__FUNCTION__, local_cxy );
413	hal_core_sleep();
414	}
415
416	// update child inode "extend" and "type" fields
417	inode_ptr = GET_PTR( inode_xp );
418	inode_ptr->extend = chdev_ptr;
419	inode_ptr->type = FILE_TYPE_DEV;
420
421	#if DEBUG_DEVFS_LOCAL_INIT
422	cycle = (uint32_t)hal_get_cycles();
423	if( DEBUG_DEVFS_LOCAL_INIT < cycle )
424	printk("\n[%s] thread[%x,%x] created <txt_rx[%d]> inode in cluster %x\n",
425	__FUNCTION__, this->process->pid, this->trdid, channel, local_cxy, cycle );
426	#endif
427	}
428	}
429	}
430
431	// create a TXT_TX inode in each cluster containing a TXT_TX chdev
432	for( channel = 0 ; channel < CONFIG_MAX_TXT_CHANNELS ; channel++ )
433	{
434	chdev_xp = chdev_dir.txt_tx[channel];
435	if( chdev_xp != XPTR_NULL )
436	{
437	chdev_cxy = GET_CXY( chdev_xp );
438	chdev_ptr = GET_PTR( chdev_xp );
439
440	if( chdev_cxy == local_cxy )
441	{
442	error = vfs_add_child_in_parent( local_cxy,
443	FS_TYPE_DEVFS,
444	devfs_external_inode_xp,
445	chdev_ptr->name,
446	&unused_xp,
447	&inode_xp );
448	if( error )
449	{
450	printk("\n[PANIC] in %s : cannot create TXT_TX inode in cluster %x\n",
451	__FUNCTION__, local_cxy );
452	hal_core_sleep();
453	}
454
455	// update child inode "extend" and "type" fields
456	inode_ptr = GET_PTR( inode_xp );
457	inode_ptr->extend = chdev_ptr;
458	inode_ptr->type = FILE_TYPE_DEV;
459
460	#if DEBUG_DEVFS_LOCAL_INIT
461	cycle = (uint32_t)hal_get_cycles();
462	if( DEBUG_DEVFS_LOCAL_INIT < cycle )
463	printk("\n[%s] thread[%x,%x] created <txt_tx[%d]> inode in cluster %x\n",
464	__FUNCTION__, this->process->pid, this->trdid, channel, local_cxy, cycle );
465	#endif
466	}
467	}
468	}
469
470	// create an IOC inode in each cluster containing an IOC chdev
471	for( channel = 0 ; channel < CONFIG_MAX_IOC_CHANNELS ; channel++ )
472	{
473	chdev_xp = chdev_dir.ioc[channel];
474	if( chdev_xp != XPTR_NULL )
475	{
476	chdev_cxy = GET_CXY( chdev_xp );
477	chdev_ptr = GET_PTR( chdev_xp );
478
479	if( chdev_cxy == local_cxy )
480	{
481	error = vfs_add_child_in_parent( local_cxy,
482	FS_TYPE_DEVFS,
483	devfs_external_inode_xp,
484	chdev_ptr->name,
485	&unused_xp,
486	&inode_xp );
487	if( error )
488	{
489	printk("\n[PANIC] in %s : cannot create IOC inode in cluster %x\n",
490	__FUNCTION__, local_cxy );
491	hal_core_sleep();
492	}
493
494	// update child inode "extend" and "type" fields
495	inode_ptr = GET_PTR( inode_xp );
496	inode_ptr->extend = chdev_ptr;
497	inode_ptr->type = FILE_TYPE_DEV;
498
499	#if DEBUG_DEVFS_LOCAL_INIT
500	cycle = (uint32_t)hal_get_cycles();
501	if( DEBUG_DEVFS_LOCAL_INIT < cycle )
502	printk("\n[%s] thread[%x,%x] created <ioc[%d]> inode in cluster %x\n",
503	__FUNCTION__, this->process->pid, this->trdid, channel, local_cxy, cycle );
504	#endif
505	}
506	}
507	}
508
509	// create a FBF inode in each cluster containing a FBF chdev
510	for( channel = 0 ; channel < CONFIG_MAX_FBF_CHANNELS ; channel++ )
511	{
512	chdev_xp = chdev_dir.fbf[channel];
513	if( chdev_xp != XPTR_NULL )
514	{
515	chdev_cxy = GET_CXY( chdev_xp );
516	chdev_ptr = GET_PTR( chdev_xp );
517
518	if( chdev_cxy == local_cxy )
519	{
520	error = vfs_add_child_in_parent( local_cxy,
521	FS_TYPE_DEVFS,
522	devfs_external_inode_xp,
523	chdev_ptr->name,
524	&unused_xp,
525	&inode_xp );
526	if( error )
527	{
528	printk("\n[PANIC] in %s : cannot create FBF inode in cluster %x\n",
529	__FUNCTION__, local_cxy );
530	hal_core_sleep();
531	}
532
533	// update child inode "extend" and "type" fields
534	inode_ptr = GET_PTR( inode_xp );
535	inode_ptr->extend = chdev_ptr;
536	inode_ptr->type = FILE_TYPE_DEV;
537
538	#if DEBUG_DEVFS_LOCAL_INIT
539	cycle = (uint32_t)hal_get_cycles();
540	if( DEBUG_DEVFS_LOCAL_INIT < cycle )
541	printk("\n[%s] thread[%x,%x] created <fbf[%d]> inode in cluster %x\n",
542	__FUNCTION__, this->process->pid, this->trdid, channel, local_cxy, cycle );
543	#endif
544	}
545	}
546	}
547
548	// create a NIC_RX inode in each cluster containing a NIC_RX chdev
549	for( channel = 0 ; channel < CONFIG_MAX_NIC_CHANNELS ; channel++ )
550	{
551	chdev_xp = chdev_dir.nic_rx[channel];
552	if( chdev_xp != XPTR_NULL )
553	{
554	chdev_cxy = GET_CXY( chdev_xp );
555	chdev_ptr = GET_PTR( chdev_xp );
556
557	if( chdev_cxy == local_cxy )
558	{
559	error = vfs_add_child_in_parent( local_cxy,
560	FS_TYPE_DEVFS,
561	devfs_external_inode_xp,
562	chdev_ptr->name,
563	&unused_xp,
564	&inode_xp );
565	if( error )
566	{
567	printk("\n[PANIC] in %s : cannot create NIC_RX inode in cluster %x\n",
568	__FUNCTION__, local_cxy );
569	hal_core_sleep();
570	}
571
572	// update child inode "extend" and "type" fields
573	inode_ptr = GET_PTR( inode_xp );
574	inode_ptr->extend = chdev_ptr;
575	inode_ptr->type = FILE_TYPE_DEV;
576
577	#if DEBUG_DEVFS_LOCAL_INIT
578	cycle = (uint32_t)hal_get_cycles();
579	if( DEBUG_DEVFS_LOCAL_INIT < cycle )
580	printk("\n[%s] thread[%x,%x] created <nic_rx[%d]> inode in cluster %x\n",
581	__FUNCTION__, this->process->pid, this->trdid, channel, local_cxy, cycle );
582	#endif
583	}
584	}
585	}
586
587	// create a NIC_TX inode in each cluster containing a NIC_TX chdev
588	for( channel = 0 ; channel < CONFIG_MAX_NIC_CHANNELS ; channel++ )
589	{
590	chdev_xp = chdev_dir.nic_tx[channel];
591	if( chdev_xp != XPTR_NULL )
592	{
593	chdev_cxy = GET_CXY( chdev_xp );
594	chdev_ptr = GET_PTR( chdev_xp );
595
596	if( chdev_cxy == local_cxy )
597	{
598	error = vfs_add_child_in_parent( local_cxy,
599	FS_TYPE_DEVFS,
600	devfs_external_inode_xp,
601	chdev_ptr->name,
602	&unused_xp,
603	&inode_xp );
604	if( error )
605	{
606	printk("\n[PANIC] in %s : cannot create NIC_TX inode in cluster %x\n",
607	__FUNCTION__, local_cxy );
608	hal_core_sleep();
609	}
610
611	// update child inode "extend" and "type" fields
612	inode_ptr = GET_PTR( inode_xp );
613	inode_ptr->extend = chdev_ptr;
614	inode_ptr->type = FILE_TYPE_DEV;
615
616	#if DEBUG_DEVFS_LOCAL_INIT
617	cycle = (uint32_t)hal_get_cycles();
618	if( DEBUG_DEVFS_LOCAL_INIT < cycle )
619	printk("\n[%s] thread[%x,%x] created <nic_tx[%d]> inode in cluster %x\n",
620	__FUNCTION__, this->process->pid, this->trdid, channel, local_cxy, cycle );
621	#endif
622	}
623	}
624	}
625	} // end devfs_local_init()
626
627	//////////////////////////////////////////
628	int devfs_user_move( bool_t to_buffer,
629	xptr_t file_xp,
630	char * u_buf,
631	uint32_t size )
632	{
633	xptr_t chdev_xp;
634	cxy_t chdev_cxy;
635	chdev_t * chdev_ptr; // associated chdev type
636	uint32_t func; // chdev functionnal type
637	uint32_t channel; // chdev channel index
638	uint32_t burst; // number of bytes in a burst
639	uint32_t todo; // number of bytes not yet moved
640	error_t error;
641	uint32_t i;
642
643	char k_buf[CONFIG_TXT_KBUF_SIZE]; // local kernel buffer
644
645	assert( __FUNCTION__, ( file_xp != XPTR_NULL ) , "file_xp == XPTR_NULL" );
646
647	#if (DEBUG_SYS_READ & 1)
648	enter_devfs_read = hal_time_stamp();
649	#endif
650
651	#if (DEBUG_SYS_WRITE & 1)
652	enter_devfs_write = hal_time_stamp();
653	#endif
654
655	#if DEBUG_DEVFS_MOVE
656	uint32_t cycle = (uint32_t)hal_get_cycles();
657	thread_t * this = CURRENT_THREAD;
658	if( DEBUG_DEVFS_MOVE < cycle )
659	printk("\n[%s] thread[%x,%x] enter / to_mem %d / cycle %d\n",
660	__FUNCTION__, this->process->pid, this->trdid, to_buffer, cycle );
661	#endif
662
663	// get extended pointer on chdev_xp
664	chdev_xp = chdev_from_file( file_xp );
665
666	// get cluster and local pointer on chdev
667	chdev_cxy = GET_CXY( chdev_xp );
668	chdev_ptr = (chdev_t *)GET_PTR( chdev_xp );
669
670	// get chdev functionnal type and channel
671	func = hal_remote_l32( XPTR( chdev_cxy , &chdev_ptr->func ) );
672	channel = hal_remote_l32( XPTR( chdev_cxy , &chdev_ptr->channel ) );
673
674	// Only TXT devices are associated to a pseudo-file
675	assert( __FUNCTION__, ( func == DEV_FUNC_TXT ) , "illegal device func_type");
676
677	// initialise number of bytes to move
678	todo = size;
679
680	/////////////// TXT read
681	if( to_buffer )
682	{
683	while( todo )
684	{
685	// set burst size
686	if( todo > CONFIG_TXT_KBUF_SIZE ) burst = CONFIG_TXT_KBUF_SIZE;
687	else burst = todo;
688
689	// read burst bytes from TXT device to kernel buffer
690	for( i = 0 ; i < burst ; i++ )
691	{
692	error = dev_txt_read( channel , &k_buf[i] );
693
694	if( error ) return -1;
695	}
696
697	// move burst bytes from k_buf to u_buf
698	hal_strcpy_to_uspace( u_buf,
699	XPTR( local_cxy , k_buf ),
700	burst );
701
702	// update loop variables
703	todo -= burst;
704	u_buf += burst;
705	}
706
707	#if DEBUG_DEVFS_MOVE
708	cycle = (uint32_t)hal_get_cycles();
709	if( DEBUG_DEVFS_MOVE < cycle )
710	printk("\n[%s] thread[%x,%x] exit / to_mem %d / cycle %d\n",
711	__FUNCTION__, this->process->pid, this->trdid, to_buffer, cycle );
712	#endif
713
714	#if (DEBUG_SYS_READ & 1)
715	exit_devfs_read = hal_time_stamp();
716	#endif
717	return size;
718	}
719	///////////// TXT write
720	else
721	{
722	while( todo )
723	{
724	// set burst size
725	if( todo > CONFIG_TXT_KBUF_SIZE ) burst = CONFIG_TXT_KBUF_SIZE;
726	else burst = todo;
727
728	// move burst bytes from u_buf to k_buf
729	hal_strcpy_from_uspace( XPTR( local_cxy , k_buf ) , u_buf , burst );
730
731	// write burst bytes from kernel buffer to TXT device
732	error = dev_txt_write( channel , k_buf , burst );
733
734	if( error ) return -1;
735
736	// update loop variables
737	todo -= burst;
738	u_buf += burst;
739	}
740
741	#if DEBUG_DEVFS_MOVE
742	cycle = (uint32_t)hal_get_cycles();
743	if( DEBUG_DEVFS_MOVE < cycle )
744	printk("\n[%s] thread[%x,%x] exit / to_mem %d / cycle %d\n",
745	__FUNCTION__, this->process->pid, this->trdid, to_buffer, cycle );
746	#endif
747
748	#if (DEBUG_SYS_WRITE & 1)
749	exit_devfs_write = hal_time_stamp();
750	#endif
751	return size;
752	}
753
754	} // end devfs_user_move()
755
756	///////////////////////////////////////////////////////
757	error_t devfs_get_user_dir( struct vfs_inode_s * inode,
758	struct dirent * array,
759	uint32_t max_dirent,
760	uint32_t min_dentry,
761	bool_t detailed,
762	uint32_t * entries,
763	bool_t * done )
764	{
765	xptr_t xhtab_xp; // extended pointer on inode xhtab (children dentries)
766	xptr_t dentry_xp; // extended pointer on current dentry
767	vfs_dentry_t * dentry_ptr; // local pointer on current dentry
768	uint32_t dentry_id; // dentry index in set of children dentry
769	uint32_t dirent_id; // dirent index in array of dirent
770
771	// detailed argument unused
772	assert( __FUNCTION__, (detailed == false) , "detailed argument not supported\n");
773
774	// One loop to scan the target inode xhtab containing the set of dentries
775	// exit loop if no more dentries, or dirent array full
776
777	#if DEBUG_DEVFS_GET_USER_DIR
778	char inode_name[CONFIG_VFS_MAX_NAME_LENGTH];
779	uint32_t cycle = (uint32_t)hal_get_cycles();
780	thread_t * this = CURRENT_THREAD;
781	vfs_inode_get_name( XPTR( local_cxy , inode ) , inode_name );
782	if( DEBUG_DEVFS_GET_USER_DIR < cycle )
783	printk("\n[%s] thread[%x,%x] enter for inode <%s> / cycle %d\n",
784	__FUNCTION__, this->process->pid, this->trdid, inode_name , cycle );
785	#endif
786
787	// get extended pointer on inode xhtab
788	xhtab_xp = XPTR( local_cxy , &inode->children );
789
790	// initialize loop variables
791	dentry_xp = xhtab_get_first( xhtab_xp );
792	dentry_id = 0;
793	dirent_id = 0;
794
795	while( (dentry_xp != XPTR_NULL ) && (dirent_id < max_dirent) )
796	{
797	if( dentry_id >= min_dentry )
798	{
799	// copy name into dirent array
800	dentry_ptr = GET_PTR( dentry_xp );
801	strcpy( array[dirent_id].d_name , dentry_ptr->name );
802
803	// increment dirent_id
804	dirent_id++;
805	}
806
807	// update loop variables
808	dentry_xp = xhtab_get_next( xhtab_xp );
809	dentry_id++;
810	}
811
812	// return results of scan
813	*done = (dentry_xp == XPTR_NULL);
814	*entries = dirent_id;
815
816	#if DEBUG_DEVFS_GET_USER_DIR
817	cycle = (uint32_t)hal_get_cycles();
818	if( DEBUG_DEVFS_GET_USER_DIR < cycle )
819	printk("\n[%s] thread[%x,%x] exit for inode <%s> / %d entries / cycle %d\n",
820	__FUNCTION__, this->process->pid, this->trdid, inode_name, entries, cycle );
821	#endif
822
823	return 0;
824
825	} // en devfs_get_user_dir()
826

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