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source: trunk/kernel/vfs/devfs.c @ 328

Last change on this file since 328 was 279, checked in by alain, 7 years ago
1) Introduce independant command fields for the various devices in the thread descriptor. 2) Introduce a new dev_pic_enable_ipi() function in the generic PIC device 3) Fix two bugs identified by Maxime in the scheduler initialisation, and in the sched_select(). 4) fix several bugs in the TSAR hal_kentry.S. 5) Introduce a third kgiet segment (besides kdata and kcode) in the TSAR bootloader.
File size: 10.8 KB

Rev	Line
[23]	1	/*
	2	* devfs.c - DEVFS File system API implementation.
	3	*
	4	* Author Mohamed Lamine Karaoui (2014,2015)
	5	* Alain Greiner (2016,2017)
	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_types.h>
	26	#include <hal_special.h>
	27	#include <printk.h>
	28	#include <chdev.h>
[188]	29	#include <cluster.h>
[23]	30	#include <vfs.h>
[188]	31	#include <kmem.h>
[23]	32	#include <devfs.h>
	33
[188]	34	/////////////////////////////////////////////////////////////////////////////////////////
	35	// Extern variables
	36	/////////////////////////////////////////////////////////////////////////////////////////
[23]	37
[188]	38	extern vfs_ctx_t fs_context[]; // allocated in kernel_init.c
	39	extern chdev_directory_t chdev_dir; // allocated in kernel_init.c
[23]	40
[188]	41	///////////////////////////////
	42	devfs_ctx_t * devfs_ctx_alloc()
	43	{
	44	kmem_req_t req;
[23]	45
[188]	46	req.type = KMEM_DEVFS_CTX;
	47	req.size = sizeof(devfs_ctx_t);
	48	req.flags = AF_KERNEL \| AF_ZERO;
[23]	49
[188]	50	return (devfs_ctx_t *)kmem_alloc( &req );
	51	}
[23]	52
[188]	53	/////////////////////////////////////////////
	54	void devfs_ctx_init( devfs_ctx_t * devfs_ctx,
[204]	55	xptr_t devfs_dev_inode_xp,
[188]	56	xptr_t devfs_external_inode_xp )
[23]	57	{
[204]	58	devfs_ctx->dev_inode_xp = devfs_dev_inode_xp;
[188]	59	devfs_ctx->external_inode_xp = devfs_external_inode_xp;
[23]	60
[188]	61	fs_context[FS_TYPE_DEVFS].extend = devfs_ctx;
	62	}
[23]	63
[188]	64	/////////////////////////////////////////////////
	65	void devfs_ctx_destroy( devfs_ctx_t * devfs_ctx )
	66	{
	67	kmem_req_t req;
[23]	68
[188]	69	req.type = KMEM_DEVFS_CTX;
	70	req.ptr = devfs_ctx;
	71	kmem_free( &req );
	72	}
[23]	73
[188]	74	///////////////////////////////////////////////////
	75	void devfs_global_init( xptr_t parent_inode_xp,
[204]	76	xptr_t * devfs_dev_inode_xp,
[188]	77	xptr_t * devfs_external_inode_xp )
[23]	78	{
	79	error_t error;
	80
[279]	81	devfs_dmsg("\n[INFO] %s : enter in cluster %x\n",
	82	__FUNCTION__ , local_cxy );
	83
[188]	84	// creates DEVFS "dev" inode in cluster IO
	85	error = vfs_add_child_in_parent( LOCAL_CLUSTER->io_cxy,
	86	INODE_TYPE_DIR,
	87	FS_TYPE_DEVFS,
	88	parent_inode_xp,
	89	"dev",
	90	NULL,
[204]	91	devfs_dev_inode_xp );
[23]	92
[279]	93	assert( (error == 0) , __FUNCTION__ , "cannot create <dev>\n" );
[23]	94
[279]	95	devfs_dmsg("\n[INFO] %s : <dev> created in cluster %x\n",
	96	__FUNCTION__ , local_cxy );
	97
[188]	98	// create DEVFS "external" inode in cluster IO
	99	error = vfs_add_child_in_parent( LOCAL_CLUSTER->io_cxy,
	100	INODE_TYPE_DIR,
	101	FS_TYPE_DEVFS,
[204]	102	*devfs_dev_inode_xp,
	103	"external",
[188]	104	NULL,
	105	devfs_external_inode_xp );
[23]	106
[279]	107	assert( (error == 0) , __FUNCTION__ , "cannot create <external>\n" );
	108
	109	devfs_dmsg("\n[INFO] %s : <external> created in cluster %x\n",
	110	__FUNCTION__ , local_cxy );
[188]	111	}
[23]	112
[204]	113	///////////////////////////////////////////////////
	114	void devfs_local_init( xptr_t devfs_dev_inode_xp,
	115	xptr_t devfs_external_inode_xp,
	116	xptr_t * devfs_internal_inode_xp )
[23]	117	{
	118	char node_name[16];
[188]	119	xptr_t chdev_xp;
	120	cxy_t chdev_cxy;
	121	xptr_t inode_xp;
[23]	122	uint32_t channel;
	123
[188]	124	// create "internal" directory linked to "dev"
	125	snprintf( node_name , 16 , "internal_%x" , local_cxy );
	126	vfs_add_child_in_parent( local_cxy,
	127	INODE_TYPE_DIR,
	128	FS_TYPE_DEVFS,
[204]	129	devfs_dev_inode_xp,
[188]	130	node_name,
	131	NULL,
[204]	132	devfs_internal_inode_xp );
[23]	133
	134	// create MMC chdev inode
[188]	135	chdev_xp = chdev_dir.mmc[local_cxy];
	136	if( chdev_xp != XPTR_NULL)
	137	{
	138	vfs_add_child_in_parent( local_cxy,
	139	INODE_TYPE_DEV,
	140	FS_TYPE_DEVFS,
[204]	141	*devfs_internal_inode_xp,
[188]	142	"mmc",
	143	GET_PTR( chdev_xp ),
	144	&inode_xp );
	145	}
[23]	146
	147	// create DMA chdev inodes (one DMA channel per core)
[188]	148	for( channel = 0 ; channel < LOCAL_CLUSTER->cores_nr ; channel++ )
[23]	149	{
[188]	150	chdev_xp = chdev_dir.dma[channel];
	151	if( chdev_xp != XPTR_NULL)
	152	{
	153	snprintf( node_name , 16 , "dma_%d" , channel );
	154	vfs_add_child_in_parent( local_cxy,
	155	INODE_TYPE_DEV,
	156	FS_TYPE_DEVFS,
[204]	157	*devfs_internal_inode_xp,
[188]	158	node_name,
	159	GET_PTR( chdev_xp ),
	160	&inode_xp );
	161	}
[23]	162	}
	163
[188]	164	// create an IOB inode in cluster containing IOB chdev
	165	chdev_xp = chdev_dir.iob;
	166	if( chdev_xp != XPTR_NULL )
[23]	167	{
[188]	168	chdev_cxy = GET_CXY( chdev_xp );
	169	if( chdev_cxy == local_cxy )
	170	{
	171	vfs_add_child_in_parent( local_cxy,
	172	INODE_TYPE_DEV,
	173	FS_TYPE_DEVFS,
	174	devfs_external_inode_xp,
	175	"iob",
	176	GET_PTR( chdev_xp ),
	177	&inode_xp );
	178	}
	179	}
[23]	180
[188]	181	// create a PIC inode in cluster containing PIC chdev
	182	chdev_xp = chdev_dir.pic;
	183	if( chdev_xp != XPTR_NULL )
	184	{
	185	chdev_cxy = GET_CXY( chdev_xp );
	186	if( chdev_cxy == local_cxy )
[23]	187	{
[188]	188	vfs_add_child_in_parent( local_cxy,
	189	INODE_TYPE_DEV,
	190	FS_TYPE_DEVFS,
	191	devfs_external_inode_xp,
	192	"pic",
	193	GET_PTR( chdev_xp ),
	194	&inode_xp );
[23]	195	}
[188]	196	}
[23]	197
[188]	198	// create a TXT inode in each cluster containing a TXT chdev
	199	for( channel = 0 ; channel < CONFIG_MAX_TXT_CHANNELS ; channel++ )
	200	{
	201	chdev_xp = chdev_dir.txt[channel];
	202	if( chdev_xp != XPTR_NULL )
[23]	203	{
[188]	204	chdev_cxy = GET_CXY( chdev_xp );
	205	if( chdev_cxy == local_cxy )
	206	{
	207	snprintf( node_name , 16 , "txt_%d" , channel );
	208	vfs_add_child_in_parent( local_cxy,
	209	INODE_TYPE_DEV,
	210	FS_TYPE_DEVFS,
	211	devfs_external_inode_xp,
	212	node_name,
	213	GET_PTR( chdev_xp ),
	214	&inode_xp );
	215	}
[23]	216	}
[188]	217	}
[23]	218
[188]	219	// create an IOC inode in each cluster containing an IOC chdev
	220	for( channel = 0 ; channel < CONFIG_MAX_IOC_CHANNELS ; channel++ )
	221	{
	222	chdev_xp = chdev_dir.ioc[channel];
	223	if( chdev_xp != XPTR_NULL )
[23]	224	{
[188]	225	chdev_cxy = GET_CXY( chdev_xp );
	226	if( chdev_cxy == local_cxy )
	227	{
	228	snprintf( node_name , 16 , "ioc_%d" , channel );
	229	vfs_add_child_in_parent( local_cxy,
	230	INODE_TYPE_DEV,
	231	FS_TYPE_DEVFS,
	232	devfs_external_inode_xp,
	233	node_name,
	234	GET_PTR( chdev_xp ),
	235	&inode_xp );
	236	}
[23]	237	}
[188]	238	}
[23]	239
[188]	240	// create a FBF inode in each cluster containing a FBF chdev
	241	for( channel = 0 ; channel < CONFIG_MAX_IOC_CHANNELS ; channel++ )
	242	{
	243	chdev_xp = chdev_dir.fbf[channel];
	244	if( chdev_xp != XPTR_NULL )
[23]	245	{
[188]	246	chdev_cxy = GET_CXY( chdev_xp );
	247	if( chdev_cxy == local_cxy )
	248	{
	249	snprintf( node_name , 16 , "fbf_%d" , channel );
	250	vfs_add_child_in_parent( local_cxy,
	251	INODE_TYPE_DEV,
	252	FS_TYPE_DEVFS,
	253	devfs_external_inode_xp,
	254	node_name,
	255	GET_PTR( chdev_xp ),
	256	&inode_xp );
	257	}
[23]	258	}
[188]	259	}
[23]	260
[188]	261	// create a NIC_RX inode in each cluster containing a NIC_RX chdev
	262	for( channel = 0 ; channel < CONFIG_MAX_NIC_CHANNELS ; channel++ )
	263	{
	264	chdev_xp = chdev_dir.nic_rx[channel];
	265	if( chdev_xp != XPTR_NULL )
[23]	266	{
[188]	267	chdev_cxy = GET_CXY( chdev_xp );
	268	if( chdev_cxy == local_cxy )
	269	{
	270	snprintf( node_name , 16 , "nic_rx_%d" , channel );
	271	vfs_add_child_in_parent( local_cxy,
	272	INODE_TYPE_DEV,
	273	FS_TYPE_DEVFS,
	274	devfs_external_inode_xp,
	275	node_name,
	276	GET_PTR( chdev_xp ),
	277	&inode_xp );
	278	}
[23]	279	}
	280	}
	281
[188]	282	// create a NIC_TX inode in each cluster containing a NIC_TX chdev
	283	for( channel = 0 ; channel < CONFIG_MAX_NIC_CHANNELS ; channel++ )
[23]	284	{
[188]	285	chdev_xp = chdev_dir.nic_tx[channel];
	286	if( chdev_xp != XPTR_NULL )
	287	{
	288	chdev_cxy = GET_CXY( chdev_xp );
	289	if( chdev_cxy == local_cxy )
	290	{
	291	snprintf( node_name , 16 , "nic_tx_%d" , channel );
	292	vfs_add_child_in_parent( local_cxy,
	293	INODE_TYPE_DEV,
	294	FS_TYPE_DEVFS,
	295	devfs_external_inode_xp,
	296	node_name,
	297	GET_PTR( chdev_xp ),
	298	&inode_xp );
	299	}
	300	}
[23]	301	}
[188]	302	} // end devfs_local_init()
[23]	303

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