[5] | 1 | /* |
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[657] | 2 | * chdev.c - channel device API implementation. |
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[5] | 3 | * |
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[657] | 4 | * Authors Alain Greiner (2016,2017,2018,2019,2020) |
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[5] | 5 | * |
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| 6 | * Copyright (c) UPMC Sorbonne Universites |
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| 7 | * |
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| 8 | * This file is part of ALMOS-MKH. |
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| 9 | * |
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| 10 | * ALMOS-MKH.is free software; you can redistribute it and/or modify it |
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| 11 | * under the terms of the GNU General Public License as published by |
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| 12 | * the Free Software Foundation; version 2.0 of the License. |
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| 13 | * |
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| 14 | * ALMOS-MKH.is distributed in the hope that it will be useful, but |
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| 15 | * WITHOUT ANY WARRANTY; without even the implied warranty of |
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| 16 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
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| 17 | * General Public License for more details. |
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| 18 | * |
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| 19 | * You should have received a copy of the GNU General Public License |
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| 20 | * along with ALMOS-MKH.; if not, write to the Free Software Foundation, |
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| 21 | * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA |
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| 22 | */ |
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| 23 | |
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[14] | 24 | #include <kernel_config.h> |
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[457] | 25 | #include <hal_kernel_types.h> |
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[5] | 26 | #include <hal_special.h> |
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[447] | 27 | #include <hal_remote.h> |
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[407] | 28 | #include <hal_irqmask.h> |
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[16] | 29 | #include <printk.h> |
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[5] | 30 | #include <boot_info.h> |
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| 31 | #include <xlist.h> |
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| 32 | #include <kmem.h> |
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[407] | 33 | #include <scheduler.h> |
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[5] | 34 | #include <thread.h> |
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| 35 | #include <rpc.h> |
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| 36 | #include <chdev.h> |
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[23] | 37 | #include <devfs.h> |
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[5] | 38 | |
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[564] | 39 | ////////////////////////////////////////////////////////////////////////////////////// |
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| 40 | // Extern global variables |
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| 41 | ////////////////////////////////////////////////////////////////////////////////////// |
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[317] | 42 | |
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[564] | 43 | extern chdev_directory_t chdev_dir; // allocated in kernel_init.c |
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[317] | 44 | |
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[564] | 45 | |
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[438] | 46 | #if (DEBUG_SYS_READ & 1) |
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[435] | 47 | extern uint32_t enter_chdev_cmd_read; |
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| 48 | extern uint32_t exit_chdev_cmd_read; |
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| 49 | extern uint32_t enter_chdev_server_read; |
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| 50 | extern uint32_t exit_chdev_server_read; |
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[407] | 51 | #endif |
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[317] | 52 | |
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[438] | 53 | #if (DEBUG_SYS_WRITE & 1) |
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[435] | 54 | extern uint32_t enter_chdev_cmd_write; |
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| 55 | extern uint32_t exit_chdev_cmd_write; |
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| 56 | extern uint32_t enter_chdev_server_write; |
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| 57 | extern uint32_t exit_chdev_server_write; |
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| 58 | #endif |
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| 59 | |
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[5] | 60 | //////////////////////////////////////////// |
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| 61 | char * chdev_func_str( uint32_t func_type ) |
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| 62 | { |
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[564] | 63 | switch ( func_type ) |
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| 64 | { |
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[583] | 65 | case DEV_FUNC_RAM: return "RAM"; |
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| 66 | case DEV_FUNC_ROM: return "ROM"; |
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| 67 | case DEV_FUNC_FBF: return "FBF"; |
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| 68 | case DEV_FUNC_IOB: return "IOB"; |
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| 69 | case DEV_FUNC_IOC: return "IOC"; |
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| 70 | case DEV_FUNC_MMC: return "MMC"; |
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| 71 | case DEV_FUNC_DMA: return "DMA"; |
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| 72 | case DEV_FUNC_NIC: return "NIC"; |
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| 73 | case DEV_FUNC_TIM: return "TIM"; |
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| 74 | case DEV_FUNC_TXT: return "TXT"; |
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| 75 | case DEV_FUNC_ICU: return "ICU"; |
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| 76 | case DEV_FUNC_PIC: return "PIC"; |
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| 77 | default: return "undefined"; |
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[527] | 78 | } |
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[5] | 79 | } |
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| 80 | |
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| 81 | ///////////////////////////////////////// |
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| 82 | chdev_t * chdev_create( uint32_t func, |
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| 83 | uint32_t impl, |
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| 84 | uint32_t channel, |
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| 85 | uint32_t is_rx, |
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| 86 | xptr_t base ) |
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| 87 | { |
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| 88 | chdev_t * chdev; |
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| 89 | |
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| 90 | // allocate memory for chdev |
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[683] | 91 | chdev = kmem_alloc( bits_log2(sizeof(chdev_t)) , AF_ZERO | AF_KERNEL ); |
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[5] | 92 | |
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| 93 | if( chdev == NULL ) return NULL; |
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| 94 | |
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[564] | 95 | // initialize lock |
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| 96 | remote_busylock_init( XPTR( local_cxy , &chdev->wait_lock ), LOCK_CHDEV_QUEUE ); |
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| 97 | |
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| 98 | // initialise waiting queue |
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[5] | 99 | xlist_root_init( XPTR( local_cxy , &chdev->wait_root ) ); |
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| 100 | |
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| 101 | // initialize attributes |
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| 102 | chdev->func = func; |
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| 103 | chdev->impl = impl; |
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| 104 | chdev->channel = channel; |
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| 105 | chdev->is_rx = is_rx; |
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| 106 | chdev->base = base; |
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| 107 | |
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| 108 | return chdev; |
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| 109 | |
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| 110 | } // end chdev_create() |
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| 111 | |
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[683] | 112 | ///////////////////////////////////// |
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| 113 | void chdev_display( xptr_t chdev_xp ) |
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[5] | 114 | { |
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[683] | 115 | chdev_t * chdev = GET_PTR( chdev_xp ); |
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| 116 | cxy_t cxy = GET_CXY( chdev_xp ); |
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| 117 | |
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| 118 | char name[16]; |
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| 119 | |
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| 120 | hal_remote_memcpy( XPTR( local_cxy, name ), |
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| 121 | XPTR( cxy , &chdev->name ), 16 ); |
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| 122 | |
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| 123 | printk("\n - chdev = [%x,%x]" |
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| 124 | "\n - name = %s" |
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| 125 | "\n - base = [%x,%x]" |
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[5] | 126 | "\n - cmd = %x" |
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[683] | 127 | "\n - isr = %x\n", |
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| 128 | cxy, |
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| 129 | chdev, |
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| 130 | name, |
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| 131 | GET_CXY( hal_remote_l64( XPTR( cxy , &chdev->base ))), |
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| 132 | GET_PTR( hal_remote_l64( XPTR( cxy , &chdev->base ))), |
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| 133 | hal_remote_lpt( XPTR( cxy , &chdev->cmd )), |
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| 134 | hal_remote_lpt( XPTR( cxy , &chdev->isr )) ); |
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[5] | 135 | |
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[683] | 136 | } // end chdev_display() |
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| 137 | |
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[407] | 138 | ////////////////////////////////////////////////// |
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| 139 | void chdev_register_command( xptr_t chdev_xp ) |
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[5] | 140 | { |
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[407] | 141 | thread_t * server_ptr; // local pointer on server thread associated to chdev |
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[440] | 142 | xptr_t server_xp; // extended pointer on server thread |
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[407] | 143 | core_t * core_ptr; // local pointer on core running the server thread |
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[457] | 144 | uint32_t server_lid; // core running the server thread local index |
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[564] | 145 | xptr_t lock_xp; // extended pointer on lock protecting the chdev state |
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[5] | 146 | |
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[438] | 147 | #if (DEBUG_SYS_READ & 1) |
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[435] | 148 | enter_chdev_cmd_read = (uint32_t)hal_get_cycles(); |
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[418] | 149 | #endif |
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| 150 | |
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[438] | 151 | #if (DEBUG_SYS_WRITE & 1) |
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[435] | 152 | enter_chdev_cmd_write = (uint32_t)hal_get_cycles(); |
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| 153 | #endif |
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| 154 | |
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[657] | 155 | thread_t * this = CURRENT_THREAD; |
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| 156 | xptr_t client_xp = XPTR( local_cxy , this ); |
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[407] | 157 | |
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[440] | 158 | // get chdev cluster and local pointer |
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[5] | 159 | cxy_t chdev_cxy = GET_CXY( chdev_xp ); |
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[440] | 160 | chdev_t * chdev_ptr = GET_PTR( chdev_xp ); |
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[5] | 161 | |
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[581] | 162 | // check calling thread can yield |
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| 163 | thread_assert_can_yield( this , __FUNCTION__ ); |
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[564] | 164 | |
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[440] | 165 | // get local and extended pointers on server thread |
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| 166 | server_ptr = (thread_t *)hal_remote_lpt( XPTR( chdev_cxy , &chdev_ptr->server) ); |
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| 167 | server_xp = XPTR( chdev_cxy , server_ptr ); |
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| 168 | |
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| 169 | // get local pointer on core running the server thread |
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| 170 | core_ptr = (core_t *)hal_remote_lpt( XPTR( chdev_cxy , &server_ptr->core ) ); |
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| 171 | |
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| 172 | // get server core local index |
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[564] | 173 | server_lid = hal_remote_l32( XPTR( chdev_cxy , &core_ptr->lid ) ); |
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[440] | 174 | |
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[438] | 175 | #if (DEBUG_CHDEV_CMD_RX || DEBUG_CHDEV_CMD_TX) |
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[619] | 176 | bool_t is_rx = hal_remote_l32( XPTR( chdev_cxy , &chdev_ptr->is_rx ) ); |
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| 177 | trdid_t server_trdid = hal_remote_l32( XPTR( chdev_cxy , &server_ptr->trdid ) ); |
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| 178 | process_t * process_ptr = hal_remote_lpt( XPTR( chdev_cxy , &server_ptr->process ) ); |
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| 179 | pid_t server_pid = hal_remote_l32( XPTR( chdev_cxy , &process_ptr->pid ) ); |
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[437] | 180 | #endif |
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| 181 | |
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[438] | 182 | #if DEBUG_CHDEV_CMD_RX |
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[437] | 183 | uint32_t rx_cycle = (uint32_t)hal_get_cycles(); |
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[438] | 184 | if( (is_rx) && (DEBUG_CHDEV_CMD_RX < rx_cycle) ) |
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[625] | 185 | printk("\n[%s] client thread[%x,%x] enter for RX / server[%x,%x] / cycle %d\n", |
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[619] | 186 | __FUNCTION__, this->process->pid, this->trdid, server_pid, server_trdid, rx_cycle ); |
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[437] | 187 | #endif |
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| 188 | |
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[438] | 189 | #if DEBUG_CHDEV_CMD_TX |
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[437] | 190 | uint32_t tx_cycle = (uint32_t)hal_get_cycles(); |
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[438] | 191 | if( (is_rx == 0) && (DEBUG_CHDEV_CMD_TX < tx_cycle) ) |
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[625] | 192 | printk("\n[%s] client thread[%x,%x] enter for TX / server[%x,%x] / cycle %d\n", |
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[619] | 193 | __FUNCTION__, this->process->pid, this->trdid, server_pid, server_trdid, tx_cycle ); |
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[437] | 194 | #endif |
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| 195 | |
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[440] | 196 | // build extended pointer on client thread xlist |
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| 197 | xptr_t list_xp = XPTR( local_cxy , &this->wait_list ); |
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[5] | 198 | |
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[440] | 199 | // build extended pointer on chdev waiting queue root |
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| 200 | xptr_t root_xp = XPTR( chdev_cxy , &chdev_ptr->wait_root ); |
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[5] | 201 | |
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[440] | 202 | // build extended pointer on lock protecting chdev waiting queue |
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[564] | 203 | lock_xp = XPTR( chdev_cxy , &chdev_ptr->wait_lock ); |
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[407] | 204 | |
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[657] | 205 | // The following actions are executed in critical section, |
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| 206 | // (because the busylock_acquire / busylock_release) |
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| 207 | // (1) take the lock protecting the waiting queue |
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[625] | 208 | // (2) register client thread in server queue |
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| 209 | // (3) unblock the server thread and block client thread |
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| 210 | // (4) send IPI to force server scheduling |
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| 211 | // (5) release the lock protecting waiting queue |
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[407] | 212 | |
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[625] | 213 | // 1. take the lock protecting chdev queue |
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[564] | 214 | remote_busylock_acquire( lock_xp ); |
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[408] | 215 | |
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[625] | 216 | // 2. register client thread in waiting queue |
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| 217 | xlist_add_last( root_xp , list_xp ); |
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[408] | 218 | |
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[450] | 219 | #if (DEBUG_CHDEV_CMD_TX & 1) |
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[625] | 220 | if( (is_rx == 0) && (DEBUG_CHDEV_CMD_TX < tx_cycle) ) |
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| 221 | printk("\n[%s] client thread[%x,%x] registered write request in chdev\n", |
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[601] | 222 | __FUNCTION__, this->process->pid, this->trdid ); |
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[450] | 223 | #endif |
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[625] | 224 | |
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[457] | 225 | #if (DEBUG_CHDEV_CMD_RX & 1) |
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[625] | 226 | if( (is_rx) && (DEBUG_CHDEV_CMD_RX < rx_cycle) ) |
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| 227 | printk("\n[%s] client thread[%x,%x] registered read request in chdev\n", |
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| 228 | __FUNCTION__, this->process->pid, this->trdid ); |
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[457] | 229 | #endif |
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[625] | 230 | |
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| 231 | // 3. client thread unblocks server thread and blocks itself |
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[657] | 232 | thread_unblock( server_xp , THREAD_BLOCKED_CLIENT ); |
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| 233 | thread_block( client_xp , THREAD_BLOCKED_IO ); |
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[440] | 234 | |
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[450] | 235 | #if (DEBUG_CHDEV_CMD_TX & 1) |
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| 236 | if( (is_rx == 0) && (DEBUG_CHDEV_CMD_TX < tx_cycle) ) |
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[625] | 237 | printk("\n[%s] client thread[%x,%x] unblock server thread[%x,%x] and block itsef\n", |
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| 238 | __FUNCTION__, this->process->pid, this->trdid, server_pid, server_trdid ); |
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[450] | 239 | #endif |
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| 240 | |
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[457] | 241 | #if (DEBUG_CHDEV_CMD_RX & 1) |
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| 242 | if( (is_rx) && (DEBUG_CHDEV_CMD_RX < rx_cycle) ) |
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[625] | 243 | printk("\n[%s] client thread[%x,%x] unblock server thread[%x,%x] and block itsef\n", |
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| 244 | __FUNCTION__, this->process->pid, this->trdid, server_pid, server_trdid ); |
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[457] | 245 | #endif |
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| 246 | |
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[625] | 247 | // 4. send IPI to core running the server thread when server core != client core |
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[457] | 248 | if( (server_lid != this->core->lid) || (local_cxy != chdev_cxy) ) |
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[450] | 249 | { |
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[457] | 250 | dev_pic_send_ipi( chdev_cxy , server_lid ); |
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| 251 | |
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[450] | 252 | #if (DEBUG_CHDEV_CMD_TX & 1) |
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| 253 | if( (is_rx == 0) && (DEBUG_CHDEV_CMD_TX < tx_cycle) ) |
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[593] | 254 | printk("\n[%s] client thread[%x,%x] sent IPI to TX server thread[%x,%x]\n", |
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[619] | 255 | __FUNCTION__, this->process->pid, this->trdid, server_pid, server_trdid ); |
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[450] | 256 | #endif |
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| 257 | |
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[457] | 258 | #if (DEBUG_CHDEV_CMD_RX & 1) |
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| 259 | if( (is_rx) && (DEBUG_CHDEV_CMD_RX < rx_cycle) ) |
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[593] | 260 | printk("\n[%s] client thread[%x,%x] sent IPI to RX server thread[%x,%x]\n", |
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[619] | 261 | __FUNCTION__, this->process->pid, this->trdid, server_pid, server_trdid ); |
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[457] | 262 | #endif |
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| 263 | |
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[450] | 264 | } |
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| 265 | |
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[625] | 266 | // 5. release lock protecting chdev queue |
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[564] | 267 | remote_busylock_release( lock_xp ); |
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[440] | 268 | |
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[408] | 269 | // deschedule |
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| 270 | sched_yield("blocked on I/O"); |
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[407] | 271 | |
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[438] | 272 | #if DEBUG_CHDEV_CMD_RX |
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[437] | 273 | rx_cycle = (uint32_t)hal_get_cycles(); |
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[438] | 274 | if( (is_rx) && (DEBUG_CHDEV_CMD_RX < rx_cycle) ) |
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[625] | 275 | printk("\n[%s] client thread[%x,%x] exit for RX / cycle %d\n", |
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[593] | 276 | __FUNCTION__, this->process->pid, this->trdid, rx_cycle ); |
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[433] | 277 | #endif |
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| 278 | |
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[438] | 279 | #if DEBUG_CHDEV_CMD_TX |
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[437] | 280 | tx_cycle = (uint32_t)hal_get_cycles(); |
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[438] | 281 | if( (is_rx == 0) && (DEBUG_CHDEV_CMD_TX < tx_cycle) ) |
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[625] | 282 | printk("\n[%s] client thread[%x,%x] exit for TX / cycle %d\n", |
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[593] | 283 | __FUNCTION__, this->process->pid, this->trdid, tx_cycle ); |
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[437] | 284 | #endif |
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| 285 | |
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[438] | 286 | #if (DEBUG_SYS_READ & 1) |
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[435] | 287 | exit_chdev_cmd_read = (uint32_t)hal_get_cycles(); |
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[418] | 288 | #endif |
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| 289 | |
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[438] | 290 | #if (DEBUG_SYS_WRITE & 1) |
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[435] | 291 | exit_chdev_cmd_write = (uint32_t)hal_get_cycles(); |
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| 292 | #endif |
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| 293 | |
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[5] | 294 | } // end chdev_register_command() |
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| 295 | |
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[619] | 296 | ///////////////////////////////////////// |
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| 297 | void chdev_server_func( chdev_t * chdev ) |
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[5] | 298 | { |
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| 299 | xptr_t client_xp; // extended pointer on waiting thread |
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| 300 | cxy_t client_cxy; // cluster of client thread |
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| 301 | thread_t * client_ptr; // local pointer on client thread |
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[407] | 302 | thread_t * server; // local pointer on server thread |
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[5] | 303 | xptr_t root_xp; // extended pointer on device waiting queue root |
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[407] | 304 | xptr_t lock_xp; // extended pointer on lock ptotecting chdev queue |
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[5] | 305 | |
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| 306 | server = CURRENT_THREAD; |
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| 307 | |
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[619] | 308 | #if( DEBUG_CHDEV_SERVER_RX || DEBUG_CHDEV_SERVER_TX ) |
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[564] | 309 | uint32_t rx_cycle = (uint32_t)hal_get_cycles(); |
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| 310 | if( (chdev->is_rx) && (DEBUG_CHDEV_SERVER_RX < rx_cycle) ) |
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[662] | 311 | printk("\n[%s] RX server thread[%x,%x] enter / channel %d / cycle %d\n", |
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[619] | 312 | __FUNCTION__ , server->process->pid, server->trdid, chdev->channel, rx_cycle ); |
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[564] | 313 | #endif |
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| 314 | |
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| 315 | #if DEBUG_CHDEV_SERVER_TX |
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| 316 | uint32_t tx_cycle = (uint32_t)hal_get_cycles(); |
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| 317 | if( (chdev->is_rx == 0) && (DEBUG_CHDEV_SERVER_TX < tx_cycle) ) |
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[662] | 318 | printk("\n[%s] TX server thread[%x,%x] enter / channel %d / cycle %d\n", |
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[619] | 319 | __FUNCTION__ , server->process->pid, server->trdid, chdev->channel, tx_cycle ); |
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[564] | 320 | #endif |
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| 321 | |
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[662] | 322 | // build extended pointer on root & lock of client threads queue |
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| 323 | root_xp = XPTR( local_cxy , &chdev->wait_root ); |
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| 324 | lock_xp = XPTR( local_cxy , &chdev->wait_lock ); |
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| 325 | |
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| 326 | // This infinite loop is executed by the DEV thread |
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| 327 | // to handle commands registered in the chdev queue. |
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| 328 | while( 1 ) |
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| 329 | { |
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[601] | 330 | // check server thread can yield |
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| 331 | thread_assert_can_yield( server , __FUNCTION__ ); |
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| 332 | |
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[407] | 333 | // get the lock protecting the waiting queue |
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[564] | 334 | remote_busylock_acquire( lock_xp ); |
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[407] | 335 | |
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[5] | 336 | // check waiting queue state |
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[662] | 337 | if( xlist_is_empty( root_xp ) ) // waiting queue empty |
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[5] | 338 | { |
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[601] | 339 | // release lock protecting the waiting queue |
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| 340 | remote_busylock_release( lock_xp ); |
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[564] | 341 | |
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| 342 | #if DEBUG_CHDEV_SERVER_RX |
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| 343 | rx_cycle = (uint32_t)hal_get_cycles(); |
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| 344 | if( (chdev->is_rx) && (DEBUG_CHDEV_SERVER_RX < rx_cycle) ) |
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[662] | 345 | printk("\n[%s] RX server thread[%x,%x] blocks & deschedules / cycle %d\n", |
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[593] | 346 | __FUNCTION__ , server->process->pid, server->trdid, rx_cycle ); |
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[564] | 347 | #endif |
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| 348 | |
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| 349 | #if DEBUG_CHDEV_SERVER_TX |
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| 350 | tx_cycle = (uint32_t)hal_get_cycles(); |
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| 351 | if( (chdev->is_rx == 0) && (DEBUG_CHDEV_SERVER_TX < tx_cycle) ) |
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[662] | 352 | printk("\n[%s] TX server thread[%x,%x] blocks & deschedules / cycle %d\n", |
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[593] | 353 | __FUNCTION__ , server->process->pid, server->trdid, tx_cycle ); |
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[564] | 354 | #endif |
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[662] | 355 | // block and deschedule |
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[657] | 356 | thread_block( XPTR( local_cxy , server ) , THREAD_BLOCKED_CLIENT ); |
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[662] | 357 | sched_yield("clients queue empty"); |
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[440] | 358 | |
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[662] | 359 | #if DEBUG_CHDEV_SERVER_RX |
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| 360 | rx_cycle = (uint32_t)hal_get_cycles(); |
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| 361 | if( (chdev->is_rx) && (DEBUG_CHDEV_SERVER_RX < rx_cycle) ) |
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| 362 | printk("\n[%s] RX server thread[%x,%x] resumes / cycle %d\n", |
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| 363 | __FUNCTION__ , server->process->pid, server->trdid, rx_cycle ); |
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| 364 | #endif |
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| 365 | |
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| 366 | #if DEBUG_CHDEV_SERVER_TX |
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| 367 | tx_cycle = (uint32_t)hal_get_cycles(); |
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| 368 | if( (chdev->is_rx == 0) && (DEBUG_CHDEV_SERVER_TX < tx_cycle) ) |
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| 369 | printk("\n[%s] TX server thread[%x,%x] resumes / cycle %d\n", |
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| 370 | __FUNCTION__ , server->process->pid, server->trdid, tx_cycle ); |
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| 371 | #endif |
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| 372 | |
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[5] | 373 | } |
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[662] | 374 | else // waiting queue not empty |
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[5] | 375 | { |
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[657] | 376 | // get pointers on first client thread |
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| 377 | client_xp = XLIST_FIRST( root_xp , thread_t , wait_list ); |
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| 378 | client_cxy = GET_CXY( client_xp ); |
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| 379 | client_ptr = GET_PTR( client_xp ); |
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| 380 | |
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| 381 | // remove this client thread from chdev waiting queue |
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| 382 | xlist_unlink( XPTR( client_cxy , &client_ptr->wait_list ) ); |
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| 383 | |
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[601] | 384 | // release lock protecting the waiting queue |
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| 385 | remote_busylock_release( lock_xp ); |
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| 386 | |
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[619] | 387 | #if( DEBUG_CHDEV_SERVER_TX || DEBUG_CHDEV_SERVER_RX ) |
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[601] | 388 | process_t * process = hal_remote_lpt( XPTR( client_cxy , &client_ptr->process ) ); |
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| 389 | pid_t client_pid = hal_remote_l32( XPTR( client_cxy , &process->pid ) ); |
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[619] | 390 | trdid_t client_trdid = hal_remote_l32( XPTR( client_cxy , &client_ptr->trdid ) ); |
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[601] | 391 | #endif |
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[440] | 392 | |
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[438] | 393 | #if DEBUG_CHDEV_SERVER_RX |
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[564] | 394 | rx_cycle = (uint32_t)hal_get_cycles(); |
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[438] | 395 | if( (chdev->is_rx) && (DEBUG_CHDEV_SERVER_RX < rx_cycle) ) |
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[625] | 396 | printk("\n[%s] server thread[%x,%x] get command from client thread[%x,%x] / cycle %d\n", |
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[619] | 397 | __FUNCTION__, server->process->pid, server->trdid, client_pid, client_trdid, rx_cycle ); |
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[437] | 398 | #endif |
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| 399 | |
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[438] | 400 | #if DEBUG_CHDEV_SERVER_TX |
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[564] | 401 | tx_cycle = (uint32_t)hal_get_cycles(); |
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[438] | 402 | if( (chdev->is_rx == 0) && (DEBUG_CHDEV_SERVER_TX < tx_cycle) ) |
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[625] | 403 | printk("\n[%s] server thread[%x,%x] get command from client thread[%x,%x] / cycle %d\n", |
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[619] | 404 | __FUNCTION__, server->process->pid, server->trdid, client_pid, client_trdid, tx_cycle ); |
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[437] | 405 | #endif |
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| 406 | |
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[438] | 407 | #if (DEBUG_SYS_READ & 1) |
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[437] | 408 | enter_chdev_server_read = (uint32_t)hal_get_cycles(); |
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| 409 | #endif |
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| 410 | |
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[438] | 411 | #if (DEBUG_SYS_WRITE & 1) |
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[437] | 412 | enter_chdev_server_write = (uint32_t)hal_get_cycles(); |
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| 413 | #endif |
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| 414 | |
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[601] | 415 | // call the (blocking) driver command function |
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| 416 | // to launch I/O operation AND wait completion |
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[407] | 417 | chdev->cmd( client_xp ); |
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[5] | 418 | |
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[601] | 419 | // unblock client thread when driver returns |
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[418] | 420 | thread_unblock( client_xp , THREAD_BLOCKED_IO ); |
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| 421 | |
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[438] | 422 | #if DEBUG_CHDEV_SERVER_RX |
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[437] | 423 | rx_cycle = (uint32_t)hal_get_cycles(); |
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[438] | 424 | if( (chdev->is_rx) && (DEBUG_CHDEV_SERVER_RX < rx_cycle) ) |
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[625] | 425 | printk("\n[%s] thread[%x,%x] completes command for client thread[%x,%x] / cycle %d\n", |
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[619] | 426 | __FUNCTION__, server->process->pid, server->trdid, client_pid, client_trdid, rx_cycle ); |
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[433] | 427 | #endif |
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[5] | 428 | |
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[438] | 429 | #if DEBUG_CHDEV_SERVER_TX |
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[437] | 430 | tx_cycle = (uint32_t)hal_get_cycles(); |
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[438] | 431 | if( (chdev->is_rx == 0) && (DEBUG_CHDEV_SERVER_TX < tx_cycle) ) |
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[625] | 432 | printk("\n[%s] thread[%x,%x] completes command for client thread[%x,%x] / cycle %d\n", |
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[662] | 433 | __FUNCTION__, server->process->pid, server->trdid, client_pid, client_trdid, tx_cycle ); |
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[437] | 434 | #endif |
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| 435 | |
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[438] | 436 | #if (DEBUG_SYS_READ & 1) |
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[435] | 437 | exit_chdev_server_read = (uint32_t)hal_get_cycles(); |
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[407] | 438 | #endif |
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| 439 | |
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[438] | 440 | #if (DEBUG_SYS_WRITE & 1) |
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[435] | 441 | exit_chdev_server_write = (uint32_t)hal_get_cycles(); |
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| 442 | #endif |
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| 443 | |
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[407] | 444 | } |
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[5] | 445 | } // end while |
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[619] | 446 | } // end chdev_server_func() |
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[5] | 447 | |
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[428] | 448 | //////////////////////////////////////// |
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| 449 | xptr_t chdev_from_file( xptr_t file_xp ) |
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| 450 | { |
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| 451 | cxy_t file_cxy; |
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| 452 | vfs_file_t * file_ptr; |
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| 453 | uint32_t inode_type; |
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| 454 | vfs_inode_t * inode_ptr; |
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| 455 | chdev_t * chdev_ptr; |
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| 456 | |
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[683] | 457 | assert( __FUNCTION__, (file_xp != XPTR_NULL) , |
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| 458 | "file_xp == XPTR_NULL" ); |
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[440] | 459 | |
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[428] | 460 | // get cluster and local pointer on remote file descriptor |
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| 461 | // associated inode and chdev are stored in same cluster as the file desc. |
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| 462 | file_cxy = GET_CXY( file_xp ); |
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| 463 | file_ptr = (vfs_file_t *)GET_PTR( file_xp ); |
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| 464 | |
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| 465 | // get inode type from file descriptor |
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[564] | 466 | inode_type = hal_remote_l32( XPTR( file_cxy , &file_ptr->type ) ); |
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[428] | 467 | inode_ptr = (vfs_inode_t *)hal_remote_lpt( XPTR( file_cxy , &file_ptr->inode ) ); |
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| 468 | |
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[683] | 469 | assert( __FUNCTION__, (inode_type == FILE_TYPE_DEV) , |
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| 470 | "inode type %d is not FILE_TYPE_DEV", inode_type ); |
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[428] | 471 | |
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| 472 | // get chdev local pointer from inode extension |
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| 473 | chdev_ptr = (chdev_t *)hal_remote_lpt( XPTR( file_cxy , &inode_ptr->extend ) ); |
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| 474 | |
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| 475 | return XPTR( file_cxy , chdev_ptr ); |
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| 476 | |
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| 477 | } // end chdev_from_file() |
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| 478 | |
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[564] | 479 | ////////////////////////////// |
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[485] | 480 | void chdev_dir_display( void ) |
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[317] | 481 | { |
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[428] | 482 | uint32_t i; |
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| 483 | cxy_t cxy; |
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| 484 | chdev_t * ptr; |
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| 485 | uint32_t base; |
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[317] | 486 | |
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[428] | 487 | // get pointers on TXT0 chdev |
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| 488 | xptr_t txt0_xp = chdev_dir.txt_tx[0]; |
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| 489 | cxy_t txt0_cxy = GET_CXY( txt0_xp ); |
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| 490 | chdev_t * txt0_ptr = GET_PTR( txt0_xp ); |
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[317] | 491 | |
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[564] | 492 | // get extended pointer on TXT0 lock |
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[428] | 493 | xptr_t lock_xp = XPTR( txt0_cxy , &txt0_ptr->wait_lock ); |
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[317] | 494 | |
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[564] | 495 | // get TXT0 lock |
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| 496 | remote_busylock_acquire( lock_xp ); |
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[317] | 497 | |
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[428] | 498 | // header |
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| 499 | nolock_printk("\n***** external chdevs directory *****\n"); |
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[317] | 500 | |
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[428] | 501 | // IOB |
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[564] | 502 | if (chdev_dir.iob != XPTR_NULL ) |
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[545] | 503 | { |
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| 504 | cxy = GET_CXY( chdev_dir.iob ); |
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| 505 | ptr = GET_PTR( chdev_dir.iob ); |
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[564] | 506 | base = (uint32_t)hal_remote_l64( XPTR( cxy , &ptr->base ) ); |
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[545] | 507 | nolock_printk(" - iob : cxy = %X / ptr = %X / base = %X\n", cxy, ptr, base); |
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| 508 | } |
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[407] | 509 | |
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[428] | 510 | // PIC |
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| 511 | cxy = GET_CXY( chdev_dir.pic ); |
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| 512 | ptr = GET_PTR( chdev_dir.pic ); |
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[564] | 513 | base = (uint32_t)hal_remote_l64( XPTR( cxy , &ptr->base ) ); |
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[428] | 514 | nolock_printk(" - pic : cxy = %X / ptr = %X / base = %X\n", cxy, ptr, base); |
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[407] | 515 | |
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[428] | 516 | // TXT |
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| 517 | for( i = 0 ; i < LOCAL_CLUSTER->nb_txt_channels ; i++ ) |
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| 518 | { |
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| 519 | cxy = GET_CXY( chdev_dir.txt_rx[i] ); |
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| 520 | ptr = GET_PTR( chdev_dir.txt_rx[i] ); |
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[564] | 521 | base = (uint32_t)hal_remote_l64( XPTR( cxy , &ptr->base ) ); |
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[428] | 522 | nolock_printk(" - txt_rx[%d] : cxy = %X / ptr = %X / base = %X\n", i, cxy, ptr, base); |
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[407] | 523 | |
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[428] | 524 | cxy = GET_CXY( chdev_dir.txt_tx[i] ); |
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| 525 | ptr = GET_PTR( chdev_dir.txt_tx[i] ); |
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[564] | 526 | base = (uint32_t)hal_remote_l64( XPTR( cxy , &ptr->base ) ); |
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[428] | 527 | nolock_printk(" - txt_tx[%d] : cxy = %X / ptr = %X / base = %X\n", i, cxy, ptr, base); |
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| 528 | } |
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[317] | 529 | |
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[428] | 530 | // IOC |
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| 531 | for( i = 0 ; i < LOCAL_CLUSTER->nb_ioc_channels ; i++ ) |
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| 532 | { |
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| 533 | cxy = GET_CXY( chdev_dir.ioc[i] ); |
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| 534 | ptr = GET_PTR( chdev_dir.ioc[i] ); |
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[564] | 535 | base = (uint32_t)hal_remote_l64( XPTR( cxy , &ptr->base ) ); |
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[428] | 536 | nolock_printk(" - ioc[%d] : cxy = %X / ptr = %X / base = %X\n", i, cxy, ptr, base); |
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| 537 | } |
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[317] | 538 | |
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[428] | 539 | // FBF |
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| 540 | for( i = 0 ; i < LOCAL_CLUSTER->nb_fbf_channels ; i++ ) |
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| 541 | { |
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| 542 | cxy = GET_CXY( chdev_dir.fbf[i] ); |
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| 543 | ptr = GET_PTR( chdev_dir.fbf[i] ); |
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[564] | 544 | base = (uint32_t)hal_remote_l64( XPTR( cxy , &ptr->base ) ); |
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[428] | 545 | nolock_printk(" - fbf[%d] : cxy = %X / ptr = %X / base = %X\n", i, cxy, ptr, base); |
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| 546 | } |
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[317] | 547 | |
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[428] | 548 | // NIC |
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| 549 | for( i = 0 ; i < LOCAL_CLUSTER->nb_nic_channels ; i++ ) |
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| 550 | { |
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| 551 | cxy = GET_CXY( chdev_dir.nic_rx[i] ); |
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| 552 | ptr = GET_PTR( chdev_dir.nic_rx[i] ); |
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[564] | 553 | base = (uint32_t)hal_remote_l64( XPTR( cxy , &ptr->base ) ); |
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[428] | 554 | nolock_printk(" - nic_rx[%d] : cxy = %X / ptr = %X / base = %X\n", i, cxy, ptr, base); |
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[317] | 555 | |
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[428] | 556 | cxy = GET_CXY( chdev_dir.nic_tx[i] ); |
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| 557 | ptr = GET_PTR( chdev_dir.nic_tx[i] ); |
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[564] | 558 | base = (uint32_t)hal_remote_l64( XPTR( cxy , &ptr->base ) ); |
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[428] | 559 | nolock_printk(" - nic_tx[%d] : cxy = %X / ptr = %X / base = %X\n", i, cxy, ptr, base); |
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| 560 | } |
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[317] | 561 | |
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[428] | 562 | // release lock |
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[564] | 563 | remote_busylock_release( lock_xp ); |
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[428] | 564 | |
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[317] | 565 | } // end chdev_dir_display() |
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| 566 | |
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[447] | 567 | /////////////////////////////////////////// |
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| 568 | void chdev_queue_display( xptr_t chdev_xp ) |
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| 569 | { |
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| 570 | cxy_t chdev_cxy; // chdev cluster |
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| 571 | chdev_t * chdev_ptr; // chdev local pointer |
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| 572 | xptr_t root_xp; // extended pointer on waiting queuue root |
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| 573 | char name[16]; // local copie of chdev name |
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| 574 | xptr_t iter_xp; // extended pointer on xlist_t field in waiting thread |
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| 575 | xptr_t thread_xp; // extended pointer on thread registered in queue |
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| 576 | cxy_t thread_cxy; // cluster identifier for waiting thread |
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| 577 | thread_t * thread_ptr; // local pointer on waiting thread |
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| 578 | trdid_t trdid; // waiting thread identifier |
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| 579 | process_t * process; // waiting thread process descriptor |
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| 580 | pid_t pid; // waiting thread process identifier |
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| 581 | |
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| 582 | // get cluster and local pointer on chdev |
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| 583 | chdev_cxy = GET_CXY( chdev_xp ); |
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| 584 | chdev_ptr = GET_PTR( chdev_xp ); |
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| 585 | |
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| 586 | // get extended pointer on root of requests queue |
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[450] | 587 | root_xp = XPTR( chdev_cxy , &chdev_ptr->wait_root ); |
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[447] | 588 | |
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| 589 | // get chdev name |
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| 590 | hal_remote_strcpy( XPTR( local_cxy , name ), XPTR( chdev_cxy , chdev_ptr->name ) ); |
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| 591 | |
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[564] | 592 | // get pointers on TXT0 chdev |
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| 593 | xptr_t txt0_xp = chdev_dir.txt_tx[0]; |
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| 594 | cxy_t txt0_cxy = GET_CXY( txt0_xp ); |
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| 595 | chdev_t * txt0_ptr = GET_PTR( txt0_xp ); |
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| 596 | |
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| 597 | // get extended pointer on TXT0 lock |
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| 598 | xptr_t lock_xp = XPTR( txt0_cxy , &txt0_ptr->wait_lock ); |
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| 599 | |
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| 600 | // get TXT0 lock |
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| 601 | remote_busylock_acquire( lock_xp ); |
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| 602 | |
---|
[447] | 603 | // check queue empty |
---|
| 604 | if( xlist_is_empty( root_xp ) ) |
---|
| 605 | { |
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[564] | 606 | nolock_printk("\n***** Waiting queue empty for chdev %s\n", name ); |
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[447] | 607 | } |
---|
| 608 | else |
---|
| 609 | { |
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[564] | 610 | nolock_printk("\n***** Waiting queue for chdev %s\n", name ); |
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[447] | 611 | |
---|
| 612 | // scan the waiting queue |
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| 613 | XLIST_FOREACH( root_xp , iter_xp ) |
---|
| 614 | { |
---|
| 615 | thread_xp = XLIST_ELEMENT( iter_xp , thread_t , wait_list ); |
---|
| 616 | thread_cxy = GET_CXY( thread_xp ); |
---|
| 617 | thread_ptr = GET_PTR( thread_xp ); |
---|
[564] | 618 | trdid = hal_remote_l32 ( XPTR( thread_cxy , &thread_ptr->trdid ) ); |
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[447] | 619 | process = hal_remote_lpt( XPTR( thread_cxy , &thread_ptr->process ) ); |
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[564] | 620 | pid = hal_remote_l32 ( XPTR( thread_cxy , &process->pid ) ); |
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[447] | 621 | |
---|
[601] | 622 | nolock_printk("- thread[%x,%x]\n", pid, trdid ); |
---|
[447] | 623 | } |
---|
| 624 | } |
---|
[564] | 625 | |
---|
| 626 | // release TXT0 lock |
---|
| 627 | remote_busylock_release( lock_xp ); |
---|
| 628 | |
---|
[447] | 629 | } // end chdev_queue_display() |
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| 630 | |
---|