Ignore:
Timestamp:
Mar 18, 2020, 11:16:59 PM (23 months 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_dma.h

    r647 r657  
    22 * dev_dma.h - DMA (Direct Memory Access) generic device API definition.
    33 *
    4  * Authors   Alain Greiner  (2016,2017,2018)
     4 * Authors   Alain Greiner  (2016,2017,2018,2019,2020)
    55 *
    66 * Copyright (c) UPMC Sorbonne Universites
     
    3636 * to/from remote clusters. The burst size is defined by the cache line size.
    3737 * Each DMA channel is described by a specific chdev descriptor, handling its private
    38  * waiting threads queue. It implement one single command : move data from a (remote)
    39  * source buffer to a (remote) destination buffer.
     38 * waiting threads queue. It implements two blocking commands :
     39 * - move synchronously data from a remote source buffer to a remote destination buffer,
     40 *   using a polling policy to wait completion (No DMA_IRQ use).
     41 * - move synchronously data from a remote source buffer to a remote destination buffer,
     42 *   using a descheduling policy to wait completion (reactivated bythe IDMA_IRQ).
    4043 ****************************************************************************************/
    4144 
     
    5053typedef struct dma_command_s
    5154{
    52     xptr_t      dev_xp;    /*! extended pointer on the DMA chdev descriptor             */
     55    bool_t      sync;      /*! polling policy if true / descheduling policy if false     */
     56    xptr_t      dev_xp;    /*! extended pointer on the DMA chdev descriptor              */
    5357    xptr_t      src_xp;    /*! extended pointer on source buffer.                        */
    5458    xptr_t      dst_xp;    /*! extended pointer on destination buffer.                   */
     
    8387/*****************************************************************************************
    8488 * This blocking function register a DMA request in the device queue.
    85  * It uses a descheduling policy to wait completion, and return an error status
    86  * when the transfer is completed.
     89 * It uses a descheduling policy to wait completion,
     90 * It return an error status when the transfer is completed.
    8791 *****************************************************************************************
    88  * @ dst        : extended pointer on destination buffer.
    89  * @ src        : extended pointer on Rsource buffer.
     92 * @ dst_xp     : extended pointer on destination buffer.
     93 * @ src_xp     : extended pointer on source buffer.
    9094 * @ size       : number of bytes to move.
    9195 ****************************************************************************************/
    92 error_t dev_dma_remote_memcpy( xptr_t     dst_xp,
    93                                xptr_t     src_xp,
    94                                uint32_t   size );   
     96error_t dev_dma_async_memcpy( xptr_t     dst_xp,
     97                              xptr_t     src_xp,
     98                              uint32_t   size );   
     99
     100/*****************************************************************************************
     101 * This blocking function register a DMA request in the device queue.
     102 * It uses a polling policy to wait completion.
     103 * It return an error status when the transfer is completed.
     104 *****************************************************************************************
     105 * @ dst_xp     : extended pointer on destination buffer.
     106 * @ src_xp     : extended pointer on source buffer.
     107 * @ size       : number of bytes to move.
     108 ****************************************************************************************/
     109error_t dev_dma_sync_memcpy( xptr_t     dst_xp,
     110                             xptr_t     src_xp,
     111                             uint32_t   size );   
    95112
    96113
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