| 1 | /* |
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| 2 | * kmem.c - kernel memory allocator implementation. |
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| 3 | * |
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| 4 | * Authors Ghassan Almaless (2008,2009,2010,2011,2012) |
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| 5 | * Alain Greiner (2016,2017,2018) |
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| 6 | * |
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| 7 | * Copyright (c) UPMC 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 <kernel_config.h> |
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| 26 | #include <hal_kernel_types.h> |
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| 27 | #include <hal_special.h> |
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| 28 | #include <printk.h> |
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| 29 | #include <busylock.h> |
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| 30 | #include <memcpy.h> |
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| 31 | #include <khm.h> |
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| 32 | #include <ppm.h> |
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| 33 | #include <page.h> |
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| 34 | #include <cluster.h> |
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| 35 | #include <thread.h> |
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| 36 | #include <process.h> |
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| 37 | #include <chdev.h> |
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| 38 | #include <mapper.h> |
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| 39 | #include <vfs.h> |
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| 40 | #include <fatfs.h> |
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| 41 | #include <ramfs.h> |
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| 42 | #include <remote_sem.h> |
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| 43 | #include <remote_barrier.h> |
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| 44 | #include <remote_mutex.h> |
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| 45 | #include <remote_condvar.h> |
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| 46 | #include <mapper.h> |
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| 47 | #include <grdxt.h> |
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| 48 | #include <vseg.h> |
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| 49 | #include <kmem.h> |
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| 50 | |
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| 51 | ///////////////////////////////// |
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| 52 | void kmem_print_kcm_table( void ) |
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| 53 | { |
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| 54 | uint32_t index; |
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| 55 | kcm_t * kcm; |
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| 56 | cluster_t * cluster = LOCAL_CLUSTER; |
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| 57 | |
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| 58 | printk("\n *** KCM Pointers Table ***\n"); |
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| 59 | |
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| 60 | for( index = 0 ; index < KMEM_TYPES_NR ; index++ ) |
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| 61 | { |
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| 62 | kcm = cluster->kcm_tbl[index]; |
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| 63 | if( kcm != NULL ) |
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| 64 | { |
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| 65 | if( index == kcm->type ) |
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| 66 | { |
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| 67 | printk(" - KCM[%s] (at address %x) is OK\n", |
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| 68 | kmem_type_str( index ) , (intptr_t)kcm ); |
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| 69 | } |
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| 70 | else |
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| 71 | { |
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| 72 | printk(" - KCM[%s] (at address %x) is KO : has type %s\n", |
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| 73 | kmem_type_str( index ) , (intptr_t)kcm , kmem_type_str( kcm->type ) ); |
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| 74 | } |
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| 75 | } |
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| 76 | } |
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| 77 | } |
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| 78 | |
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| 79 | ///////////////////////////////////////// |
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| 80 | uint32_t kmem_type_size( uint32_t type ) |
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| 81 | { |
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| 82 | if ( type == KMEM_PAGE ) return CONFIG_PPM_PAGE_SIZE; |
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| 83 | else if( type == KMEM_GENERIC ) return 0; |
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| 84 | else if( type == KMEM_KCM ) return sizeof( kcm_t ); |
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| 85 | else if( type == KMEM_VSEG ) return sizeof( vseg_t ); |
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| 86 | else if( type == KMEM_DEVICE ) return sizeof( chdev_t ); |
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| 87 | else if( type == KMEM_MAPPER ) return sizeof( mapper_t ); |
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| 88 | else if( type == KMEM_PROCESS ) return sizeof( process_t ); |
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| 89 | else if( type == KMEM_CPU_CTX ) return CONFIG_CPU_CTX_SIZE; |
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| 90 | else if( type == KMEM_FPU_CTX ) return CONFIG_FPU_CTX_SIZE; |
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| 91 | else if( type == KMEM_BARRIER ) return sizeof( remote_barrier_t ); |
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| 92 | |
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| 93 | else if( type == KMEM_DEVFS_CTX ) return sizeof( fatfs_ctx_t ); |
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| 94 | else if( type == KMEM_FATFS_CTX ) return sizeof( fatfs_ctx_t ); |
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| 95 | else if( type == KMEM_VFS_CTX ) return sizeof( vfs_ctx_t ); |
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| 96 | else if( type == KMEM_VFS_INODE ) return sizeof( vfs_inode_t ); |
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| 97 | else if( type == KMEM_VFS_DENTRY ) return sizeof( vfs_dentry_t ); |
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| 98 | else if( type == KMEM_VFS_FILE ) return sizeof( vfs_file_t ); |
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| 99 | else if( type == KMEM_SEM ) return sizeof( remote_sem_t ); |
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| 100 | else if( type == KMEM_CONDVAR ) return sizeof( remote_condvar_t ); |
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| 101 | else if( type == KMEM_MUTEX ) return sizeof( remote_mutex_t ); |
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| 102 | else if( type == KMEM_512_BYTES ) return 512; |
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| 103 | |
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| 104 | else return 0; |
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| 105 | } |
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| 106 | |
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| 107 | ///////////////////////////////////// |
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| 108 | char * kmem_type_str( uint32_t type ) |
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| 109 | { |
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| 110 | if ( type == KMEM_PAGE ) return "KMEM_PAGE"; |
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| 111 | else if( type == KMEM_GENERIC ) return "KMEM_GENERIC"; |
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| 112 | else if( type == KMEM_KCM ) return "KMEM_KCM"; |
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| 113 | else if( type == KMEM_VSEG ) return "KMEM_VSEG"; |
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| 114 | else if( type == KMEM_DEVICE ) return "KMEM_DEVICE"; |
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| 115 | else if( type == KMEM_MAPPER ) return "KMEM_MAPPER"; |
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| 116 | else if( type == KMEM_PROCESS ) return "KMEM_PROCESS"; |
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| 117 | else if( type == KMEM_CPU_CTX ) return "KMEM_CPU_CTX"; |
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| 118 | else if( type == KMEM_FPU_CTX ) return "KMEM_FPU_CTX"; |
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| 119 | else if( type == KMEM_BARRIER ) return "KMEM_BARRIER"; |
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| 120 | |
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| 121 | else if( type == KMEM_DEVFS_CTX ) return "KMEM_DEVFS_CTX"; |
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| 122 | else if( type == KMEM_FATFS_CTX ) return "KMEM_FATFS_CTX"; |
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| 123 | else if( type == KMEM_VFS_CTX ) return "KMEM_VFS_CTX"; |
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| 124 | else if( type == KMEM_VFS_INODE ) return "KMEM_VFS_INODE"; |
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| 125 | else if( type == KMEM_VFS_DENTRY ) return "KMEM_VFS_DENTRY"; |
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| 126 | else if( type == KMEM_VFS_FILE ) return "KMEM_VFS_FILE"; |
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| 127 | else if( type == KMEM_SEM ) return "KMEM_SEM"; |
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| 128 | else if( type == KMEM_CONDVAR ) return "KMEM_CONDVAR"; |
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| 129 | else if( type == KMEM_MUTEX ) return "KMEM_MUTEX"; |
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| 130 | else if( type == KMEM_512_BYTES ) return "KMEM_512_BYTES"; |
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| 131 | |
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| 132 | else return "undefined"; |
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| 133 | } |
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| 134 | |
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| 135 | ///////////////////////////////////////////////////////////////////////////////////////////// |
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| 136 | // This static function dynamically allocates and initializes a specific KCM allocator. |
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| 137 | // It uses the KCM allocator embedded in cluster manager, initialized by cluster_init(). |
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| 138 | ///////////////////////////////////////////////////////////////////////////////////////////// |
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| 139 | static error_t kmem_create_kcm( uint32_t type ) |
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| 140 | { |
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| 141 | kcm_t * kcm; |
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| 142 | |
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| 143 | assert( ((type > 1) && (type < KMEM_TYPES_NR) ) , "illegal KCM type" ); |
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| 144 | |
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| 145 | #if DEBUG_KMEM |
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| 146 | uint32_t cycle = (uint32_t)hal_get_cycles(); |
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| 147 | if( DEBUG_KMEM < cycle ) |
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| 148 | printk("\n[DBG] %s : thread %x enter / KCM type %s missing in cluster %x / cycle %d\n", |
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| 149 | __FUNCTION__, CURRENT_THREAD, kmem_type_str( type ), local_cxy, cycle ); |
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| 150 | #endif |
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| 151 | |
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| 152 | cluster_t * cluster = LOCAL_CLUSTER; |
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| 153 | |
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| 154 | // allocate memory for the requested KCM allocator |
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| 155 | // from the KCM allocator embedded in cluster descriptor |
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| 156 | kcm = kcm_alloc( &cluster->kcm ); |
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| 157 | |
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| 158 | if( kcm == NULL ) |
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| 159 | { |
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| 160 | printk("\n[ERROR] in %s : failed to create KCM type %d in cluster %x\n", |
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| 161 | __FUNCTION__ , type , local_cxy ); |
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| 162 | return ENOMEM; |
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| 163 | } |
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| 164 | |
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| 165 | // initialize the new KCM allocator |
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| 166 | kcm_init( kcm , type ); |
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| 167 | |
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| 168 | // register it in the KCM pointers Table |
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| 169 | cluster->kcm_tbl[type] = kcm; |
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| 170 | |
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| 171 | hal_fence(); |
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| 172 | |
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| 173 | #if DEBUG_KMEM |
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| 174 | cycle = (uint32_t)hal_get_cycles(); |
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| 175 | if( DEBUG_KMEM < cycle ) |
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| 176 | printk("\n[DBG] %s : thread %x exit / cycle %d\n", |
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| 177 | __FUNCTION__, CURRENT_THREAD, cycle ); |
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| 178 | #endif |
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| 179 | |
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| 180 | return 0; |
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| 181 | } |
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| 182 | |
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| 183 | ///////////////////////////////////// |
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| 184 | void * kmem_alloc( kmem_req_t * req ) |
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| 185 | { |
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| 186 | cluster_t * cluster = LOCAL_CLUSTER; |
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| 187 | |
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| 188 | uint32_t type; |
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| 189 | uint32_t flags; |
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| 190 | uint32_t size; // ln( pages ) if PPM / bytes if KHM / unused if KCM |
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| 191 | void * ptr; // memory buffer if KHM or KCM / page descriptor if PPM |
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| 192 | uint32_t irq_state; |
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| 193 | |
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| 194 | |
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| 195 | type = req->type; |
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| 196 | size = req->size; |
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| 197 | flags = req->flags; |
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| 198 | |
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| 199 | assert( (type < KMEM_TYPES_NR) , "illegal KMEM request type" ); |
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| 200 | |
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| 201 | #if DEBUG_KMEM |
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| 202 | uint32_t cycle = (uint32_t)hal_get_cycles(); |
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| 203 | if( DEBUG_KMEM < cycle ) |
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| 204 | printk("\n[DBG] %s : thread %x enter / type %s / cluster %x / cycle %d\n", |
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| 205 | __FUNCTION__, CURRENT_THREAD, kmem_type_str( type ), local_cxy, cycle ); |
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| 206 | #endif |
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| 207 | |
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| 208 | // analyse request type |
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| 209 | if( type == KMEM_PAGE ) // PPM allocator |
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| 210 | { |
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| 211 | // allocate the number of requested pages |
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| 212 | ptr = (void *)ppm_alloc_pages( size ); |
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| 213 | if( ptr == NULL ) |
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| 214 | { |
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| 215 | printk("\n[ERROR] in %s : failed for type %d / size %d in cluster %x\n", |
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| 216 | __FUNCTION__ , type , size , local_cxy ); |
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| 217 | return NULL; |
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| 218 | } |
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| 219 | |
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| 220 | // reset page if requested |
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| 221 | if( flags & AF_ZERO ) page_zero( (page_t *)ptr ); |
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| 222 | |
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| 223 | #if DEBUG_KMEM |
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| 224 | cycle = (uint32_t)hal_get_cycles(); |
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| 225 | if( DEBUG_KMEM < cycle ) |
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| 226 | printk("\n[DBG] %s : thread %x exit / %d page(s) allocated / ppn %x / cycle %d\n", |
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| 227 | __FUNCTION__, CURRENT_THREAD, 1<<size, ppm_page2ppn(XPTR(local_cxy,ptr)), cycle ); |
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| 228 | #endif |
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| 229 | |
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| 230 | } |
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| 231 | else if( type == KMEM_GENERIC ) // KHM allocator |
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| 232 | { |
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| 233 | // allocate memory from KHM |
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| 234 | ptr = khm_alloc( &cluster->khm , size ); |
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| 235 | if( ptr == NULL ) |
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| 236 | { |
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| 237 | printk("\n[ERROR] in %s : failed for type %d / size %d in cluster %x\n", |
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| 238 | __FUNCTION__ , type , size , local_cxy ); |
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| 239 | return NULL; |
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| 240 | } |
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| 241 | |
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| 242 | // reset memory if requested |
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| 243 | if( flags & AF_ZERO ) memset( ptr , 0 , size ); |
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| 244 | |
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| 245 | #if DEBUG_KMEM |
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| 246 | cycle = (uint32_t)hal_get_cycles(); |
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| 247 | if( DEBUG_KMEM < cycle ) |
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| 248 | printk("\n[DBG] %s : thread %x exit / type %s allocated / base %x / size %d / cycle %d\n", |
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| 249 | __FUNCTION__, CURRENT_THREAD, kmem_type_str( type ), (intptr_t)ptr, size, cycle ); |
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| 250 | #endif |
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| 251 | |
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| 252 | } |
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| 253 | else // KCM allocator |
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| 254 | { |
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| 255 | // initialize the KCM allocator if not already done |
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| 256 | if( cluster->kcm_tbl[type] == NULL ) |
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| 257 | { |
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| 258 | // get lock protecting local kcm_tbl[] array |
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| 259 | busylock_acquire( &cluster->kcm_lock ); |
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| 260 | |
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| 261 | // create missing KCM |
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| 262 | error_t error = kmem_create_kcm( type ); |
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| 263 | |
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| 264 | // release lock protecting local kcm_tbl[] array |
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| 265 | busylock_release( &cluster->kcm_lock ); |
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| 266 | |
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| 267 | if ( error ) |
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| 268 | { |
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| 269 | printk("\n[ERROR] in %s : cannot create KCM type %d in cluster %x\n", |
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| 270 | __FUNCTION__, type, local_cxy ); |
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| 271 | return NULL; |
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| 272 | } |
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| 273 | } |
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| 274 | |
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| 275 | // allocate memory from KCM |
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| 276 | ptr = kcm_alloc( cluster->kcm_tbl[type] ); |
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| 277 | if( ptr == NULL ) |
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| 278 | { |
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| 279 | printk("\n[ERROR] in %s : failed for type %d / size %d in cluster %x\n", |
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| 280 | __FUNCTION__ , type , size , local_cxy ); |
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| 281 | return NULL; |
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| 282 | } |
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| 283 | |
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| 284 | // reset memory if requested |
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| 285 | if( flags & AF_ZERO ) memset( ptr , 0 , kmem_type_size( type ) ); |
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| 286 | |
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| 287 | #if DEBUG_KMEM |
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| 288 | cycle = (uint32_t)hal_get_cycles(); |
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| 289 | if( DEBUG_KMEM < cycle ) |
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| 290 | printk("\n[DBG] %s : thread %x exit / type %s allocated / base %x / size %d / cycle %d\n", |
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| 291 | __FUNCTION__, CURRENT_THREAD, kmem_type_str(type), (intptr_t)ptr, |
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| 292 | kmem_type_size(type), cycle ); |
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| 293 | #endif |
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| 294 | |
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| 295 | } |
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| 296 | |
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| 297 | return ptr; |
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| 298 | } |
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| 299 | |
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| 300 | ////////////////////////////////// |
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| 301 | void kmem_free( kmem_req_t * req ) |
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| 302 | { |
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| 303 | if( req->type >= KMEM_TYPES_NR ) |
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| 304 | { |
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| 305 | assert( false , "illegal request type\n" ); |
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| 306 | } |
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| 307 | |
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| 308 | switch(req->type) |
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| 309 | { |
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| 310 | case KMEM_PAGE: |
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| 311 | ppm_free_pages( (page_t*)req->ptr ); |
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| 312 | return; |
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| 313 | |
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| 314 | case KMEM_GENERIC: |
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| 315 | khm_free( req->ptr ); |
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| 316 | return; |
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| 317 | |
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| 318 | default: |
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| 319 | kcm_free( req->ptr ); |
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| 320 | return; |
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| 321 | } |
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| 322 | } |
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| 323 | |
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