| 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_kernel_types.h> | 
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| 26 | #include <hal_special.h> | 
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| 27 | #include <hal_uspace.h> | 
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| 28 | #include <printk.h> | 
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| 29 | #include <chdev.h> | 
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| 30 | #include <thread.h> | 
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| 31 | #include <dev_txt.h> | 
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| 32 | #include <cluster.h> | 
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| 33 | #include <vfs.h> | 
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| 34 | #include <kmem.h> | 
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| 35 | #include <devfs.h> | 
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| 36 |  | 
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| 37 | ///////////////////////////////////////////////////////////////////////////////////////// | 
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| 38 | //     Extern variables | 
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| 39 | ///////////////////////////////////////////////////////////////////////////////////////// | 
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| 40 |  | 
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| 41 | extern vfs_ctx_t            fs_context[];   // allocated in kernel_init.c | 
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| 42 | extern chdev_directory_t    chdev_dir;      // allocated in kernel_init.c | 
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| 43 |  | 
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| 44 | #if (DEBUG_SYS_READ & 1) | 
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| 45 | extern uint32_t  enter_devfs_read; | 
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| 46 | extern uint32_t  exit_devfs_read; | 
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| 47 | #endif | 
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| 48 |  | 
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| 49 | #if (DEBUG_SYS_WRITE & 1) | 
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| 50 | extern uint32_t  enter_devfs_write; | 
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| 51 | extern uint32_t  exit_devfs_write; | 
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| 52 | #endif | 
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| 53 |  | 
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| 54 | /////////////////////////////// | 
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| 55 | devfs_ctx_t * devfs_ctx_alloc( void ) | 
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| 56 | { | 
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| 57 | kmem_req_t    req; | 
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| 58 |  | 
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| 59 | req.type    = KMEM_DEVFS_CTX; | 
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| 60 | req.size    = sizeof(devfs_ctx_t); | 
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| 61 | req.flags   = AF_KERNEL | AF_ZERO; | 
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| 62 |  | 
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| 63 | return (devfs_ctx_t *)kmem_alloc( &req ); | 
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| 64 | } | 
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| 65 |  | 
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| 66 | ///////////////////////////////////////////// | 
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| 67 | void devfs_ctx_init( devfs_ctx_t * devfs_ctx, | 
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| 68 | xptr_t        devfs_dev_inode_xp, | 
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| 69 | xptr_t        devfs_external_inode_xp ) | 
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| 70 | { | 
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| 71 | devfs_ctx->dev_inode_xp      = devfs_dev_inode_xp; | 
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| 72 | devfs_ctx->external_inode_xp = devfs_external_inode_xp; | 
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| 73 |  | 
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| 74 | fs_context[FS_TYPE_DEVFS].extend = devfs_ctx; | 
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| 75 | } | 
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| 76 |  | 
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| 77 | ///////////////////////////////////////////////// | 
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| 78 | void devfs_ctx_destroy( devfs_ctx_t * devfs_ctx ) | 
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| 79 | { | 
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| 80 | kmem_req_t    req; | 
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| 81 |  | 
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| 82 | req.type = KMEM_DEVFS_CTX; | 
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| 83 | req.ptr  = devfs_ctx; | 
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| 84 | kmem_free( &req ); | 
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| 85 | } | 
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| 86 |  | 
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| 87 | ///////////////////////////////////////////////// | 
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| 88 | void devfs_global_init( xptr_t   parent_inode_xp, | 
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| 89 | xptr_t * devfs_dev_inode_xp, | 
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| 90 | xptr_t * devfs_external_inode_xp ) | 
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| 91 | { | 
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| 92 | error_t  error; | 
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| 93 |  | 
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| 94 | #if DEBUG_DEVFS_INIT | 
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| 95 | uint32_t cycle = (uint32_t)hal_get_cycles(); | 
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| 96 | if( DEBUG_DEVFS_INIT < cycle ) | 
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| 97 | printk("\n[DBG] %s : thread %x enter at cycle %d\n", | 
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| 98 | __FUNCTION__ , CURRENT_THREAD , cycle ); | 
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| 99 | #endif | 
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| 100 |  | 
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| 101 | // creates DEVFS "dev" inode in cluster 0 | 
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| 102 | error = vfs_add_child_in_parent( 0,                // cxy | 
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| 103 | INODE_TYPE_DIR, | 
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| 104 | FS_TYPE_DEVFS, | 
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| 105 | parent_inode_xp, | 
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| 106 | "dev", | 
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| 107 | NULL, | 
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| 108 | devfs_dev_inode_xp ); | 
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| 109 |  | 
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| 110 | assert( (error == 0) , "cannot create <dev>\n" ); | 
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| 111 |  | 
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| 112 | #if( DEBUG_DEVFS_INIT & 1 ) | 
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| 113 | if( DEBUG_DEVFS_INIT < cycle ) | 
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| 114 | printk("\n[DBG] %s : created <dev> inode at cycle %d\n", __FUNCTION__, cycle ); | 
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| 115 | #endif | 
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| 116 |  | 
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| 117 | // create DEVFS "external" inode in cluster 0 | 
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| 118 | error = vfs_add_child_in_parent( 0,               // cxy | 
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| 119 | INODE_TYPE_DIR, | 
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| 120 | FS_TYPE_DEVFS, | 
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| 121 | *devfs_dev_inode_xp, | 
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| 122 | "external", | 
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| 123 | NULL, | 
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| 124 | devfs_external_inode_xp ); | 
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| 125 |  | 
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| 126 | assert( (error == 0) , "cannot create <external>\n" ); | 
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| 127 |  | 
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| 128 | #if DEBUG_DEVFS_INIT | 
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| 129 | cycle = (uint32_t)hal_get_cycles(); | 
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| 130 | if( DEBUG_DEVFS_INIT < cycle ) | 
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| 131 | printk("\n[DBG] %s : thread %x exit at cycle %d\n", | 
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| 132 | __FUNCTION__ , CURRENT_THREAD , cycle ); | 
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| 133 | #endif | 
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| 134 |  | 
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| 135 | } | 
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| 136 |  | 
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| 137 | /////////////////////////////////////////////////// | 
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| 138 | void devfs_local_init( xptr_t   devfs_dev_inode_xp, | 
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| 139 | xptr_t   devfs_external_inode_xp, | 
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| 140 | xptr_t * devfs_internal_inode_xp ) | 
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| 141 | { | 
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| 142 | char          node_name[16]; | 
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| 143 | xptr_t        chdev_xp; | 
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| 144 | cxy_t         chdev_cxy; | 
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| 145 | chdev_t     * chdev_ptr; | 
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| 146 | xptr_t        inode_xp; | 
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| 147 | uint32_t      channel; | 
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| 148 |  | 
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| 149 | #if DEBUG_DEVFS_INIT | 
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| 150 | uint32_t cycle = (uint32_t)hal_get_cycles(); | 
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| 151 | if( DEBUG_DEVFS_INIT < cycle ) | 
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| 152 | printk("\n[DBG] %s : thread %x enter at cycle %d\n", | 
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| 153 | __FUNCTION__ , CURRENT_THREAD , cycle ); | 
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| 154 | #endif | 
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| 155 |  | 
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| 156 | // create "internal" directory linked to "dev" | 
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| 157 | snprintf( node_name , 16 , "internal_%x" , local_cxy ); | 
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| 158 | vfs_add_child_in_parent( local_cxy, | 
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| 159 | INODE_TYPE_DIR, | 
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| 160 | FS_TYPE_DEVFS, | 
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| 161 | devfs_dev_inode_xp, | 
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| 162 | node_name, | 
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| 163 | NULL, | 
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| 164 | devfs_internal_inode_xp ); | 
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| 165 |  | 
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| 166 | // create MMC chdev inode | 
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| 167 | chdev_xp  = chdev_dir.mmc[local_cxy]; | 
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| 168 | if( chdev_xp != XPTR_NULL) | 
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| 169 | { | 
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| 170 | chdev_ptr = (chdev_t *)GET_PTR( chdev_xp ); | 
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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_internal_inode_xp, | 
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| 175 | chdev_ptr->name, | 
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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 | // create DMA chdev inodes (one DMA channel per core) | 
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| 181 | for( channel = 0 ; channel < LOCAL_CLUSTER->cores_nr ; channel++ ) | 
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| 182 | { | 
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| 183 | chdev_xp = chdev_dir.dma[channel]; | 
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| 184 | if( chdev_xp != XPTR_NULL) | 
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| 185 | { | 
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| 186 | chdev_ptr = (chdev_t *)GET_PTR( chdev_xp ); | 
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| 187 | vfs_add_child_in_parent( local_cxy, | 
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| 188 | INODE_TYPE_DEV, | 
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| 189 | FS_TYPE_DEVFS, | 
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| 190 | *devfs_internal_inode_xp, | 
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| 191 | chdev_ptr->name, | 
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| 192 | GET_PTR( chdev_xp ), | 
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| 193 | &inode_xp ); | 
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| 194 | } | 
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| 195 | } | 
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| 196 |  | 
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| 197 | // create an IOB inode in cluster containing IOB chdev | 
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| 198 | chdev_xp = chdev_dir.iob; | 
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| 199 | if( chdev_xp != XPTR_NULL ) | 
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| 200 | { | 
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| 201 | chdev_cxy = GET_CXY( chdev_xp ); | 
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| 202 | chdev_ptr = (chdev_t *)GET_PTR( chdev_xp ); | 
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| 203 | if( chdev_cxy == local_cxy ) | 
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| 204 | { | 
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| 205 | vfs_add_child_in_parent( local_cxy, | 
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| 206 | INODE_TYPE_DEV, | 
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| 207 | FS_TYPE_DEVFS, | 
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| 208 | devfs_external_inode_xp, | 
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| 209 | chdev_ptr->name, | 
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| 210 | GET_PTR( chdev_xp ), | 
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| 211 | &inode_xp ); | 
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| 212 | } | 
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| 213 | } | 
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| 214 |  | 
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| 215 | // create a PIC inode in cluster containing PIC chdev | 
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| 216 | chdev_xp = chdev_dir.pic; | 
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| 217 | if( chdev_xp != XPTR_NULL ) | 
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| 218 | { | 
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| 219 | chdev_cxy = GET_CXY( chdev_xp ); | 
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| 220 | chdev_ptr = (chdev_t *)GET_PTR( chdev_xp ); | 
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| 221 | if( chdev_cxy == local_cxy ) | 
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| 222 | { | 
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| 223 | vfs_add_child_in_parent( local_cxy, | 
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| 224 | INODE_TYPE_DEV, | 
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| 225 | FS_TYPE_DEVFS, | 
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| 226 | devfs_external_inode_xp, | 
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| 227 | chdev_ptr->name, | 
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| 228 | GET_PTR( chdev_xp ), | 
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| 229 | &inode_xp ); | 
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| 230 | } | 
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| 231 | } | 
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| 232 |  | 
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| 233 | // create a TXT_RX inode in each cluster containing a TXT_RX chdev | 
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| 234 | for( channel = 0 ; channel < CONFIG_MAX_TXT_CHANNELS ; channel++ ) | 
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| 235 | { | 
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| 236 | chdev_xp = chdev_dir.txt_rx[channel]; | 
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| 237 | if( chdev_xp != XPTR_NULL ) | 
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| 238 | { | 
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| 239 | chdev_cxy = GET_CXY( chdev_xp ); | 
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| 240 | chdev_ptr = (chdev_t *)GET_PTR( chdev_xp ); | 
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| 241 | if( chdev_cxy == local_cxy ) | 
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| 242 | { | 
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| 243 | vfs_add_child_in_parent( local_cxy, | 
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| 244 | INODE_TYPE_DEV, | 
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| 245 | FS_TYPE_DEVFS, | 
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| 246 | devfs_external_inode_xp, | 
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| 247 | chdev_ptr->name, | 
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| 248 | GET_PTR( chdev_xp ), | 
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| 249 | &inode_xp ); | 
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| 250 | } | 
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| 251 | } | 
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| 252 | } | 
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| 253 |  | 
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| 254 | // create a TXT_TX inode in each cluster containing a TXT_TX chdev | 
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| 255 | for( channel = 0 ; channel < CONFIG_MAX_TXT_CHANNELS ; channel++ ) | 
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| 256 | { | 
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| 257 | chdev_xp = chdev_dir.txt_tx[channel]; | 
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| 258 | if( chdev_xp != XPTR_NULL ) | 
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| 259 | { | 
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| 260 | chdev_cxy = GET_CXY( chdev_xp ); | 
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| 261 | chdev_ptr = (chdev_t *)GET_PTR( chdev_xp ); | 
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| 262 | if( chdev_cxy == local_cxy ) | 
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| 263 | { | 
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| 264 | vfs_add_child_in_parent( local_cxy, | 
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| 265 | INODE_TYPE_DEV, | 
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| 266 | FS_TYPE_DEVFS, | 
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| 267 | devfs_external_inode_xp, | 
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| 268 | chdev_ptr->name, | 
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| 269 | GET_PTR( chdev_xp ), | 
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| 270 | &inode_xp ); | 
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| 271 | } | 
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| 272 | } | 
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| 273 | } | 
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| 274 |  | 
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| 275 | // create an IOC inode in each cluster containing an IOC chdev | 
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| 276 | for( channel = 0 ; channel < CONFIG_MAX_IOC_CHANNELS ; channel++ ) | 
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| 277 | { | 
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| 278 | chdev_xp = chdev_dir.ioc[channel]; | 
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| 279 | if( chdev_xp != XPTR_NULL ) | 
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| 280 | { | 
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| 281 | chdev_cxy = GET_CXY( chdev_xp ); | 
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| 282 | chdev_ptr = (chdev_t *)GET_PTR( chdev_xp ); | 
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| 283 | if( chdev_cxy == local_cxy ) | 
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| 284 | { | 
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| 285 | vfs_add_child_in_parent( local_cxy, | 
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| 286 | INODE_TYPE_DEV, | 
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| 287 | FS_TYPE_DEVFS, | 
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| 288 | devfs_external_inode_xp, | 
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| 289 | chdev_ptr->name, | 
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| 290 | GET_PTR( chdev_xp ), | 
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| 291 | &inode_xp ); | 
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| 292 | } | 
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| 293 | } | 
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| 294 | } | 
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| 295 |  | 
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| 296 | // create a FBF inode in each cluster containing a FBF chdev | 
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| 297 | for( channel = 0 ; channel < CONFIG_MAX_IOC_CHANNELS ; channel++ ) | 
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| 298 | { | 
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| 299 | chdev_xp = chdev_dir.fbf[channel]; | 
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| 300 | if( chdev_xp != XPTR_NULL ) | 
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| 301 | { | 
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| 302 | chdev_cxy = GET_CXY( chdev_xp ); | 
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| 303 | chdev_ptr = (chdev_t *)GET_PTR( chdev_xp ); | 
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| 304 | if( chdev_cxy == local_cxy ) | 
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| 305 | { | 
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| 306 | vfs_add_child_in_parent( local_cxy, | 
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| 307 | INODE_TYPE_DEV, | 
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| 308 | FS_TYPE_DEVFS, | 
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| 309 | devfs_external_inode_xp, | 
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| 310 | chdev_ptr->name, | 
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| 311 | GET_PTR( chdev_xp ), | 
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| 312 | &inode_xp ); | 
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| 313 | } | 
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| 314 | } | 
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| 315 | } | 
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| 316 |  | 
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| 317 | // create a NIC_RX inode in each cluster containing a NIC_RX chdev | 
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| 318 | for( channel = 0 ; channel < CONFIG_MAX_NIC_CHANNELS ; channel++ ) | 
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| 319 | { | 
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| 320 | chdev_xp = chdev_dir.nic_rx[channel]; | 
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| 321 | if( chdev_xp != XPTR_NULL ) | 
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| 322 | { | 
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| 323 | chdev_cxy = GET_CXY( chdev_xp ); | 
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| 324 | chdev_ptr = (chdev_t *)GET_PTR( chdev_xp ); | 
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| 325 | if( chdev_cxy == local_cxy ) | 
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| 326 | { | 
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| 327 | vfs_add_child_in_parent( local_cxy, | 
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| 328 | INODE_TYPE_DEV, | 
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| 329 | FS_TYPE_DEVFS, | 
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| 330 | devfs_external_inode_xp, | 
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| 331 | chdev_ptr->name, | 
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| 332 | GET_PTR( chdev_xp ), | 
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| 333 | &inode_xp ); | 
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| 334 | } | 
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| 335 | } | 
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| 336 | } | 
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| 337 |  | 
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| 338 | // create a NIC_TX inode in each cluster containing a NIC_TX chdev | 
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| 339 | for( channel = 0 ; channel < CONFIG_MAX_NIC_CHANNELS ; channel++ ) | 
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| 340 | { | 
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| 341 | chdev_xp = chdev_dir.nic_tx[channel]; | 
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| 342 | if( chdev_xp != XPTR_NULL ) | 
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| 343 | { | 
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| 344 | chdev_cxy = GET_CXY( chdev_xp ); | 
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| 345 | chdev_ptr = (chdev_t *)GET_PTR( chdev_xp ); | 
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| 346 | if( chdev_cxy == local_cxy ) | 
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| 347 | { | 
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| 348 | vfs_add_child_in_parent( local_cxy, | 
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| 349 | INODE_TYPE_DEV, | 
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| 350 | FS_TYPE_DEVFS, | 
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| 351 | devfs_external_inode_xp, | 
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| 352 | chdev_ptr->name, | 
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| 353 | GET_PTR( chdev_xp ), | 
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| 354 | &inode_xp ); | 
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| 355 | } | 
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| 356 | } | 
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| 357 | } | 
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| 358 |  | 
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| 359 | #if DEBUG_DEVFS_INIT | 
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| 360 | cycle = (uint32_t)hal_get_cycles(); | 
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| 361 | if( DEBUG_DEVFS_INIT < cycle ) | 
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| 362 | printk("\n[DBG] %s : thread %x exit at cycle %d\n", | 
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| 363 | __FUNCTION__ , CURRENT_THREAD , cycle ); | 
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| 364 | #endif | 
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| 365 |  | 
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| 366 | }  // end devfs_local_init() | 
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| 367 |  | 
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| 368 | ////////////////////////////////////////// | 
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| 369 | int devfs_user_move( bool_t     to_buffer, | 
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| 370 | xptr_t     file_xp, | 
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| 371 | void     * u_buf, | 
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| 372 | uint32_t   size ) | 
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| 373 | { | 
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| 374 | assert( ( file_xp != XPTR_NULL ) , "file_xp == XPTR_NULL" ); | 
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| 375 |  | 
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| 376 | assert( ( size < CONFIG_TXT_KBUF_SIZE ) , "string size too large" ); | 
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| 377 |  | 
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| 378 | xptr_t             chdev_xp; | 
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| 379 | cxy_t              chdev_cxy; | 
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| 380 | chdev_t          * chdev_ptr;    // associated chdev type | 
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| 381 | uint32_t           func;         // chdev functionnal type | 
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| 382 | uint32_t           channel;      // chdev channel index | 
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| 383 | error_t            error; | 
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| 384 |  | 
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| 385 | char               k_buf[CONFIG_TXT_KBUF_SIZE];  // local kernel buffer | 
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| 386 |  | 
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| 387 | #if (DEBUG_SYS_READ & 1) | 
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| 388 | enter_devfs_read = hal_time_stamp(); | 
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| 389 | #endif | 
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| 390 |  | 
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| 391 | #if (DEBUG_SYS_WRITE & 1) | 
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| 392 | enter_devfs_write = hal_time_stamp(); | 
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| 393 | #endif | 
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| 394 |  | 
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| 395 | #if DEBUG_DEVFS_MOVE | 
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| 396 | uint32_t cycle = (uint32_t)hal_get_cycles(); | 
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| 397 | if( DEBUG_DEVFS_MOVE < cycle ) | 
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| 398 | printk("\n[DBG] %s : thread %x enter / to_mem %d / cycle %d\n", | 
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| 399 | __FUNCTION__ , CURRENT_THREAD , to_buffer , cycle ); | 
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| 400 | #endif | 
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| 401 |  | 
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| 402 | // get extended pointer on chdev_xp | 
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| 403 | chdev_xp = chdev_from_file( file_xp ); | 
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| 404 |  | 
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| 405 | // get cluster and local pointer on chdev | 
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| 406 | chdev_cxy  = GET_CXY( chdev_xp ); | 
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| 407 | chdev_ptr  = (chdev_t *)GET_PTR( chdev_xp ); | 
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| 408 |  | 
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| 409 | // get chdev functionnal type and channel | 
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| 410 | func    = hal_remote_lw( XPTR( chdev_cxy , &chdev_ptr->func ) ); | 
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| 411 | channel = hal_remote_lw( XPTR( chdev_cxy , &chdev_ptr->channel ) ); | 
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| 412 |  | 
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| 413 | // action depends on "func" and "to_buffer" | 
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| 414 | if( func == DEV_FUNC_TXT ) | 
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| 415 | { | 
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| 416 | if( to_buffer )     // TXT read | 
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| 417 | { | 
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| 418 | uint32_t i; | 
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| 419 | for( i = 0 ; i < size ; i++ ) | 
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| 420 | { | 
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| 421 | error = dev_txt_read( channel , &k_buf[i] ); | 
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| 422 |  | 
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| 423 | if( error ) | 
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| 424 | { | 
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| 425 | return -1; | 
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| 426 | } | 
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| 427 | else | 
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| 428 | { | 
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| 429 | hal_strcpy_to_uspace( u_buf , k_buf , size ); | 
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| 430 | } | 
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| 431 | } | 
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| 432 |  | 
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| 433 | #if DEBUG_DEVFS_MOVE | 
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| 434 | cycle = (uint32_t)hal_get_cycles(); | 
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| 435 | if( DEBUG_DEVFS_MOVE < cycle ) | 
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| 436 | printk("\n[DBG] %s : thread %x exit / to_mem %d / cycle %d\n", | 
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| 437 | __FUNCTION__ , CURRENT_THREAD , to_buffer / cycle ); | 
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| 438 | #endif | 
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| 439 |  | 
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| 440 | #if (DEBUG_SYS_READ & 1) | 
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| 441 | exit_devfs_read = hal_time_stamp(); | 
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| 442 | #endif | 
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| 443 | return size; | 
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| 444 | } | 
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| 445 | else                // TXT write | 
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| 446 | { | 
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| 447 | hal_strcpy_from_uspace( k_buf , u_buf , size ); | 
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| 448 |  | 
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| 449 | error = dev_txt_write( channel , k_buf , size ); | 
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| 450 | if( error ) | 
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| 451 | { | 
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| 452 | return -1; | 
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| 453 | } | 
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| 454 | else | 
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| 455 | { | 
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| 456 |  | 
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| 457 | #if DEBUG_DEVFS_MOVE | 
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| 458 | cycle = (uint32_t)hal_get_cycles(); | 
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| 459 | if( DEBUG_DEVFS_MOVE < cycle ) | 
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| 460 | printk("\n[DBG] %s : thread %x exit / to_mem %d / cycle %d\n", | 
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| 461 | __FUNCTION__ , CURRENT_THREAD , to_buffer / cycle ); | 
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| 462 | #endif | 
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| 463 |  | 
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| 464 | #if (DEBUG_SYS_WRITE & 1) | 
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| 465 | exit_devfs_write = hal_time_stamp(); | 
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| 466 | #endif | 
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| 467 | return size; | 
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| 468 | } | 
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| 469 | } | 
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| 470 | } | 
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| 471 | else | 
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| 472 | { | 
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| 473 | assert( false , "%s does not support direct user access", | 
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| 474 | chdev_func_str(func) ); | 
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| 475 |  | 
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| 476 | return -1; | 
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| 477 | } | 
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| 478 |  | 
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| 479 | }  // end devfs_user_move() | 
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| 480 |  | 
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| 481 |  | 
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