| 1 | /* |
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| 2 | * devfs.c - DEVFS File system API implementation. |
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| 3 | * |
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| 4 | * Author Mohamed Lamine Karaoui (2014,2015) |
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| 5 | * Alain Greiner (2016,2017) |
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| 6 | * |
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| 7 | * Copyright (c) Sorbonne Universites |
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| 8 | * |
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| 9 | * This file is part of ALMOS-MKH. |
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| 10 | * |
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| 11 | * ALMOS-MKH is free software; you can redistribute it and/or modify it |
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| 12 | * under the terms of the GNU General Public License as published by |
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| 13 | * the Free Software Foundation; version 2.0 of the License. |
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| 14 | * |
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| 15 | * ALMOS-MKH is distributed in the hope that it will be useful, but |
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| 16 | * WITHOUT ANY WARRANTY; without even the implied warranty of |
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| 17 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
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| 18 | * General Public License for more details. |
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| 19 | * |
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| 20 | * You should have received a copy of the GNU General Public License |
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| 21 | * along with ALMOS-MKH; if not, write to the Free Software Foundation, |
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| 22 | * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA |
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| 23 | */ |
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| 24 | |
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| 25 | #include <hal_types.h> |
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| 26 | #include <hal_special.h> |
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| 27 | #include <printk.h> |
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| 28 | #include <chdev.h> |
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| 29 | #include <cluster.h> |
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| 30 | #include <vfs.h> |
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| 31 | #include <kmem.h> |
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| 32 | #include <devfs.h> |
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| 33 | |
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| 34 | ///////////////////////////////////////////////////////////////////////////////////////// |
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| 35 | // Extern variables |
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| 36 | ///////////////////////////////////////////////////////////////////////////////////////// |
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| 37 | |
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| 38 | extern vfs_ctx_t fs_context[]; // allocated in kernel_init.c |
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| 39 | extern chdev_directory_t chdev_dir; // allocated in kernel_init.c |
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| 40 | |
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| 41 | /////////////////////////////// |
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| 42 | devfs_ctx_t * devfs_ctx_alloc() |
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| 43 | { |
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| 44 | kmem_req_t req; |
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| 45 | |
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| 46 | req.type = KMEM_DEVFS_CTX; |
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| 47 | req.size = sizeof(devfs_ctx_t); |
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| 48 | req.flags = AF_KERNEL | AF_ZERO; |
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| 49 | |
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| 50 | return (devfs_ctx_t *)kmem_alloc( &req ); |
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| 51 | } |
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| 52 | |
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| 53 | ///////////////////////////////////////////// |
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| 54 | void devfs_ctx_init( devfs_ctx_t * devfs_ctx, |
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| 55 | xptr_t devfs_dev_inode_xp, |
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| 56 | xptr_t devfs_external_inode_xp ) |
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| 57 | { |
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| 58 | devfs_ctx->dev_inode_xp = devfs_dev_inode_xp; |
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| 59 | devfs_ctx->external_inode_xp = devfs_external_inode_xp; |
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| 60 | |
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| 61 | fs_context[FS_TYPE_DEVFS].extend = devfs_ctx; |
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| 62 | } |
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| 63 | |
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| 64 | ///////////////////////////////////////////////// |
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| 65 | void devfs_ctx_destroy( devfs_ctx_t * devfs_ctx ) |
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| 66 | { |
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| 67 | kmem_req_t req; |
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| 68 | |
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| 69 | req.type = KMEM_DEVFS_CTX; |
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| 70 | req.ptr = devfs_ctx; |
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| 71 | kmem_free( &req ); |
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| 72 | } |
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| 73 | |
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| 74 | /////////////////////////////////////////////////// |
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| 75 | void devfs_global_init( xptr_t parent_inode_xp, |
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| 76 | xptr_t * devfs_dev_inode_xp, |
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| 77 | xptr_t * devfs_external_inode_xp ) |
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| 78 | { |
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| 79 | error_t error; |
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| 80 | |
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| 81 | devfs_dmsg("\n[INFO] %s : enter in cluster %x\n", |
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| 82 | __FUNCTION__ , local_cxy ); |
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| 83 | |
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| 84 | // creates DEVFS "dev" inode in cluster IO |
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| 85 | error = vfs_add_child_in_parent( LOCAL_CLUSTER->io_cxy, |
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| 86 | INODE_TYPE_DIR, |
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| 87 | FS_TYPE_DEVFS, |
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| 88 | parent_inode_xp, |
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| 89 | "dev", |
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| 90 | NULL, |
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| 91 | devfs_dev_inode_xp ); |
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| 92 | |
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| 93 | assert( (error == 0) , __FUNCTION__ , "cannot create <dev>\n" ); |
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| 94 | |
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| 95 | devfs_dmsg("\n[INFO] %s : <dev> created in cluster %x\n", |
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| 96 | __FUNCTION__ , local_cxy ); |
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| 97 | |
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| 98 | // create DEVFS "external" inode in cluster IO |
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| 99 | error = vfs_add_child_in_parent( LOCAL_CLUSTER->io_cxy, |
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| 100 | INODE_TYPE_DIR, |
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| 101 | FS_TYPE_DEVFS, |
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| 102 | *devfs_dev_inode_xp, |
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| 103 | "external", |
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| 104 | NULL, |
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| 105 | devfs_external_inode_xp ); |
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| 106 | |
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| 107 | assert( (error == 0) , __FUNCTION__ , "cannot create <external>\n" ); |
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| 108 | |
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| 109 | devfs_dmsg("\n[INFO] %s : <external> created in cluster %x\n", |
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| 110 | __FUNCTION__ , local_cxy ); |
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| 111 | } |
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| 112 | |
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| 113 | /////////////////////////////////////////////////// |
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| 114 | void devfs_local_init( xptr_t devfs_dev_inode_xp, |
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| 115 | xptr_t devfs_external_inode_xp, |
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| 116 | xptr_t * devfs_internal_inode_xp ) |
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| 117 | { |
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| 118 | char node_name[16]; |
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| 119 | xptr_t chdev_xp; |
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| 120 | cxy_t chdev_cxy; |
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| 121 | xptr_t inode_xp; |
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| 122 | uint32_t channel; |
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| 123 | |
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| 124 | // create "internal" directory linked to "dev" |
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| 125 | snprintf( node_name , 16 , "internal_%x" , local_cxy ); |
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| 126 | vfs_add_child_in_parent( local_cxy, |
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| 127 | INODE_TYPE_DIR, |
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| 128 | FS_TYPE_DEVFS, |
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| 129 | devfs_dev_inode_xp, |
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| 130 | node_name, |
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| 131 | NULL, |
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| 132 | devfs_internal_inode_xp ); |
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| 133 | |
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| 134 | // create MMC chdev inode |
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| 135 | chdev_xp = chdev_dir.mmc[local_cxy]; |
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| 136 | if( chdev_xp != XPTR_NULL) |
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| 137 | { |
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| 138 | vfs_add_child_in_parent( local_cxy, |
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| 139 | INODE_TYPE_DEV, |
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| 140 | FS_TYPE_DEVFS, |
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| 141 | *devfs_internal_inode_xp, |
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| 142 | "mmc", |
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| 143 | GET_PTR( chdev_xp ), |
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| 144 | &inode_xp ); |
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| 145 | } |
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| 146 | |
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| 147 | // create DMA chdev inodes (one DMA channel per core) |
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| 148 | for( channel = 0 ; channel < LOCAL_CLUSTER->cores_nr ; channel++ ) |
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| 149 | { |
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| 150 | chdev_xp = chdev_dir.dma[channel]; |
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| 151 | if( chdev_xp != XPTR_NULL) |
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| 152 | { |
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| 153 | snprintf( node_name , 16 , "dma_%d" , channel ); |
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| 154 | vfs_add_child_in_parent( local_cxy, |
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| 155 | INODE_TYPE_DEV, |
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| 156 | FS_TYPE_DEVFS, |
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| 157 | *devfs_internal_inode_xp, |
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| 158 | node_name, |
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| 159 | GET_PTR( chdev_xp ), |
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| 160 | &inode_xp ); |
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| 161 | } |
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| 162 | } |
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| 163 | |
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| 164 | // create an IOB inode in cluster containing IOB chdev |
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| 165 | chdev_xp = chdev_dir.iob; |
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| 166 | if( chdev_xp != XPTR_NULL ) |
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| 167 | { |
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| 168 | chdev_cxy = GET_CXY( chdev_xp ); |
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| 169 | if( chdev_cxy == local_cxy ) |
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| 170 | { |
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| 171 | vfs_add_child_in_parent( local_cxy, |
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| 172 | INODE_TYPE_DEV, |
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| 173 | FS_TYPE_DEVFS, |
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| 174 | devfs_external_inode_xp, |
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| 175 | "iob", |
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| 176 | GET_PTR( chdev_xp ), |
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| 177 | &inode_xp ); |
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| 178 | } |
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| 179 | } |
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| 180 | |
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| 181 | // create a PIC inode in cluster containing PIC chdev |
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| 182 | chdev_xp = chdev_dir.pic; |
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| 183 | if( chdev_xp != XPTR_NULL ) |
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| 184 | { |
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| 185 | chdev_cxy = GET_CXY( chdev_xp ); |
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| 186 | if( chdev_cxy == local_cxy ) |
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| 187 | { |
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| 188 | vfs_add_child_in_parent( local_cxy, |
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| 189 | INODE_TYPE_DEV, |
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| 190 | FS_TYPE_DEVFS, |
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| 191 | devfs_external_inode_xp, |
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| 192 | "pic", |
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| 193 | GET_PTR( chdev_xp ), |
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| 194 | &inode_xp ); |
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| 195 | } |
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| 196 | } |
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| 197 | |
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| 198 | // create a TXT inode in each cluster containing a TXT chdev |
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| 199 | for( channel = 0 ; channel < CONFIG_MAX_TXT_CHANNELS ; channel++ ) |
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| 200 | { |
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| 201 | chdev_xp = chdev_dir.txt[channel]; |
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| 202 | if( chdev_xp != XPTR_NULL ) |
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| 203 | { |
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| 204 | chdev_cxy = GET_CXY( chdev_xp ); |
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| 205 | if( chdev_cxy == local_cxy ) |
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| 206 | { |
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| 207 | snprintf( node_name , 16 , "txt_%d" , channel ); |
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| 208 | vfs_add_child_in_parent( local_cxy, |
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| 209 | INODE_TYPE_DEV, |
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| 210 | FS_TYPE_DEVFS, |
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| 211 | devfs_external_inode_xp, |
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| 212 | node_name, |
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| 213 | GET_PTR( chdev_xp ), |
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| 214 | &inode_xp ); |
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| 215 | } |
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| 216 | } |
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| 217 | } |
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| 218 | |
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| 219 | // create an IOC inode in each cluster containing an IOC chdev |
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| 220 | for( channel = 0 ; channel < CONFIG_MAX_IOC_CHANNELS ; channel++ ) |
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| 221 | { |
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| 222 | chdev_xp = chdev_dir.ioc[channel]; |
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| 223 | if( chdev_xp != XPTR_NULL ) |
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| 224 | { |
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| 225 | chdev_cxy = GET_CXY( chdev_xp ); |
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| 226 | if( chdev_cxy == local_cxy ) |
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| 227 | { |
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| 228 | snprintf( node_name , 16 , "ioc_%d" , channel ); |
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| 229 | vfs_add_child_in_parent( local_cxy, |
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| 230 | INODE_TYPE_DEV, |
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| 231 | FS_TYPE_DEVFS, |
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| 232 | devfs_external_inode_xp, |
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| 233 | node_name, |
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| 234 | GET_PTR( chdev_xp ), |
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| 235 | &inode_xp ); |
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| 236 | } |
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| 237 | } |
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| 238 | } |
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| 239 | |
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| 240 | // create a FBF inode in each cluster containing a FBF chdev |
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| 241 | for( channel = 0 ; channel < CONFIG_MAX_IOC_CHANNELS ; channel++ ) |
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| 242 | { |
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| 243 | chdev_xp = chdev_dir.fbf[channel]; |
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| 244 | if( chdev_xp != XPTR_NULL ) |
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| 245 | { |
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| 246 | chdev_cxy = GET_CXY( chdev_xp ); |
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| 247 | if( chdev_cxy == local_cxy ) |
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| 248 | { |
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| 249 | snprintf( node_name , 16 , "fbf_%d" , channel ); |
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| 250 | vfs_add_child_in_parent( local_cxy, |
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| 251 | INODE_TYPE_DEV, |
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| 252 | FS_TYPE_DEVFS, |
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| 253 | devfs_external_inode_xp, |
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| 254 | node_name, |
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| 255 | GET_PTR( chdev_xp ), |
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| 256 | &inode_xp ); |
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| 257 | } |
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| 258 | } |
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| 259 | } |
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| 260 | |
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| 261 | // create a NIC_RX inode in each cluster containing a NIC_RX chdev |
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| 262 | for( channel = 0 ; channel < CONFIG_MAX_NIC_CHANNELS ; channel++ ) |
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| 263 | { |
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| 264 | chdev_xp = chdev_dir.nic_rx[channel]; |
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| 265 | if( chdev_xp != XPTR_NULL ) |
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| 266 | { |
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| 267 | chdev_cxy = GET_CXY( chdev_xp ); |
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| 268 | if( chdev_cxy == local_cxy ) |
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| 269 | { |
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| 270 | snprintf( node_name , 16 , "nic_rx_%d" , channel ); |
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| 271 | vfs_add_child_in_parent( local_cxy, |
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| 272 | INODE_TYPE_DEV, |
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| 273 | FS_TYPE_DEVFS, |
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| 274 | devfs_external_inode_xp, |
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| 275 | node_name, |
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| 276 | GET_PTR( chdev_xp ), |
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| 277 | &inode_xp ); |
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| 278 | } |
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| 279 | } |
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| 280 | } |
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| 281 | |
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| 282 | // create a NIC_TX inode in each cluster containing a NIC_TX chdev |
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| 283 | for( channel = 0 ; channel < CONFIG_MAX_NIC_CHANNELS ; channel++ ) |
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| 284 | { |
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| 285 | chdev_xp = chdev_dir.nic_tx[channel]; |
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| 286 | if( chdev_xp != XPTR_NULL ) |
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| 287 | { |
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| 288 | chdev_cxy = GET_CXY( chdev_xp ); |
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| 289 | if( chdev_cxy == local_cxy ) |
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| 290 | { |
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| 291 | snprintf( node_name , 16 , "nic_tx_%d" , channel ); |
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| 292 | vfs_add_child_in_parent( local_cxy, |
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| 293 | INODE_TYPE_DEV, |
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| 294 | FS_TYPE_DEVFS, |
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| 295 | devfs_external_inode_xp, |
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| 296 | node_name, |
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| 297 | GET_PTR( chdev_xp ), |
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| 298 | &inode_xp ); |
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| 299 | } |
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| 300 | } |
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| 301 | } |
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| 302 | } // end devfs_local_init() |
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| 303 | |
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