Ignore:
Timestamp:
Mar 18, 2020, 11:16:59 PM (4 years ago)
Author:
alain
Message:

Introduce remote_buf.c/.h & socket.c/.h files.
Update dev_nic.c/.h files.

File:
1 edited

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  • trunk/kernel/devices/dev_ioc.h

    r647 r657  
    22 * dev_ioc.h - IOC (Block Device Controler) generic device API definition.
    33 *
    4  * Author  Alain Greiner    (2016,2017,2018,2019)
     4 * Author  Alain Greiner    (2016,2017,2018,2019,2020)
    55 *
    66 * Copyright (c) UPMC Sorbonne Universites
    … …  
    4545 * - SYNC_WRITE : move blocks from memory to device, with a busy waiting policy.
    4646 *
    47  * For the he READ or WRITE operations, the client thread is descheduled, and the work
     47 * For the READ or WRITE operations, the client thread is descheduled, and the work
    4848 * is done by the server thread associated to the IOC device:
    4949 * The client thread calls the dev_ioc_move_data() kernel functions that (i) registers
    … …  
    9393
    9494/******************************************************************************************
    95  * This defines the (implementation independant)  command passed to the driver.
     95 * This structure defines the IOC command for all drivers implementing the IOC device.
    9696 *****************************************************************************************/
    9797
    … …  
    103103    IOC_SYNC_WRITE = 3,
    104104}
    105 cmd_type_t;
     105ioc_cmd_type_t;
    106106
    107107typedef struct ioc_command_s
    … …  
    111111    uint32_t    lba;        /*! first block index                                        */
    112112    uint32_t    count;      /*! number of blocks                                         */
    113     xptr_t      buf_xp;     /*! extended pointer on memory buffer                        */
     113    xptr_t      buf_xp;     /*! extended pointer on kernel memory buffer                 */
    114114    uint32_t    error;      /*! operation status (0 if success)                          */
    115115}
    … …  
    122122 * @ return pointer on string.
    123123 *****************************************************************************************/
    124 char * dev_ioc_cmd_str( cmd_type_t cmd );
     124char * dev_ioc_cmd_str( ioc_cmd_type_t cmd );
    125125
    126126/******************************************************************************************
    … …  
    138138
    139139/******************************************************************************************
    140  * This blocking function moves <count> contiguous blocks of data between the block device
    141  * starting from block defined by the <lba> argument and a kernel memory buffer, defined
    142  * by the <buffer_xp> argument. The transfer direction and mode are defined by the
    143  * <cmd_type> argument. The request is always registered in the calling thread descriptor.
    144  * - In synchronous mode, the calling thread is not descheduled, and directly calls the
    145  *   IOC driver, polling the IOC status to detect transfer completion.
    146  * - In asynchronous mode, the calling thread blocks and deschedules, and the IOC driver
    147  *   is called by the server thread associated to the IOC device.
    148  ******************************************************************************************
    149  * @ cmd_type  : IOC_READ / IOC_WRITE / IOC_SYNC_READ / IOC_SYN_WRITE.
    150  * @ buffer_xp : extended pointer on kernel buffer in memory (must be block aligned).
    151  * @ lba       : first block index on device.
    152  * @ count     : number of blocks to transfer.
    153  * @ returns 0 if success / returns -1 if error.
    154  *****************************************************************************************/
    155 error_t dev_ioc_move_data( uint32_t  cmd_type,
    156                            xptr_t    buffer_xp,
     140 * This blocking function register an asynchronous READ request : move <count> contiguous
     141 * blocks from the block device, starting from block defined by the <lba> argument, to a
     142 * kernel buffer defined by the <buffer_xp> argument.
     143 * It register the request in the client thread descriptor, it register the client thread
     144 * in the IOC device queue, it blocks on the THREAD_BLOCKED_IO condition, and deschedules.
     145 * It will be reactivated by the DEV server thread when the transfer is completed.
     146 * It can be executed by a thread running in any cluster.
     147 ******************************************************************************************
     148 * @ buffer_xp : extended pointer on kernel buffer in memory (must be block aligned).
     149 * @ lba       : first block index on device.
     150 * @ count     : number of blocks to transfer.
     151 * @ returns 0 if success / returns -1 if error.
     152 *****************************************************************************************/
     153error_t dev_ioc_read( xptr_t    buffer_xp,
     154                      uint32_t  lba,
     155                      uint32_t  count );
     156
     157/******************************************************************************************
     158 * This blocking function register an asynchronous WRITE request : move <count> contiguous
     159 * blocks from a kernel buffer defined by the <buffer_xp> argument to the block device,
     160 * starting from block defined by the <lba> argument.
     161 * It register the request in the client thread descriptor, it register the client thread
     162 * in the IOC device queue, it blocks on the THREAD_BLOCKED_IO condition, and deschedules.
     163 * It will be reactivated by the DEV server thread when the transfer is completed.
     164 * It can be executed by a thread running in any cluster.
     165 ******************************************************************************************
     166 * @ buffer_xp : extended pointer on kernel buffer in memory (must be block aligned).
     167 * @ lba       : first block index on device.
     168 * @ count     : number of blocks to transfer.
     169 * @ returns 0 if success / returns -1 if error.
     170 *****************************************************************************************/
     171error_t dev_ioc_write( xptr_t    buffer_xp,
     172                       uint32_t  lba,
     173                       uint32_t  count );
     174
     175/******************************************************************************************
     176 * This blocking function executes a synchronous SYNC_READ request : it moves <count>
     177 * contiguous blocks of data from the block device, starting from block defined by the
     178 * <lba> argument to a kernel memory buffer, defined by the <buffer_xp> argument.
     179 * The request is registered in the calling thread descriptor, but the client thread calls
     180 * directly the driver cmd function, that is also a blocking function returning only
     181 * when the transfer is completed.
     182 * It can be executed by a thread running in any cluster.
     183 ******************************************************************************************
     184 * @ buffer_xp : extended pointer on kernel buffer in memory (must be block aligned).
     185 * @ lba       : first block index on device.
     186 * @ count     : number of blocks to transfer.
     187 * @ returns 0 if success / returns -1 if error.
     188 *****************************************************************************************/
     189error_t dev_ioc_sync_read( xptr_t    buffer_xp,
    157190                           uint32_t  lba,
    158191                           uint32_t  count );
    159192
     193/******************************************************************************************
     194 * This blocking function executes a synchronous SYNC_WRITE request : it moves <count>
     195 * contiguous blocks of data from a kernel memory buffer, defined by the <buffer_xp>
     196 * argument to the block device, starting from block defined by the <lba> argument.
     197 * The request is registered in the calling thread descriptor, but the client thread calls
     198 * directly the driver cmd() function, that is also a blocking function returning only
     199 * when the transfer is completed.
     200 * It can be executed by a thread running in any cluster.
     201 ******************************************************************************************
     202 * @ buffer_xp : extended pointer on kernel buffer in memory (must be block aligned).
     203 * @ lba       : first block index on device.
     204 * @ count     : number of blocks to transfer.
     205 * @ returns 0 if success / returns -1 if error.
     206 *****************************************************************************************/
     207error_t dev_ioc_sync_write( xptr_t    buffer_xp,
     208                            uint32_t  lba,
     209                            uint32_t  count );
     210
    160211#endif  /* _DEV_IOC_H */
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