[vbox-dev] vbox-dev Digest, Vol 81, Issue 26

[李明]

yes , my host is windows  ,guest is linux 。 i want to transfer data between guest and host , and i use code blow 。the same if guest is windows and in windows driver is work ok , but ,why can't use it in linux driver the same way 。


int  vpaudio_call_hgcm(struct minivosc_device *mydev,struct hgcm_call_struct *param)
{
    
    int  rc = VINF_SUCCESS;

    RM_HGCM_CALL_REQUEST_SINGLE sinreq  ={0};
    RM_HGCM_CALL_REQUEST_DUAL   dualreq ={0};
    
    if (param->function_code == HGCM_FN_DUAL_BUFFER_REQUEST)
    {
        dualreq.InParam.type  = VMMDevHGCMParmType_LinAddr_In;
        dualreq.OutParam.type = VMMDevHGCMParmType_LinAddr_Out;
        
        dualreq.callinfo.u32Function = HGCM_FN_DUAL_BUFFER_REQUEST;
        dualreq.callinfo.u32ClientID = mydev->ulClientID;
        dualreq.callinfo.cParms      = 2;
        
        dualreq.InParam.u.Pointer.u.linearAddr  = (RTGCPTR32)param->in_data;
        dualreq.InParam.u.Pointer.size          = param->in_size;
        dualreq.OutParam.u.Pointer.u.linearAddr = (RTGCPTR32)param->out_data;
        dualreq.OutParam.u.Pointer.size         = param->out_size;
    
        return vPVbglHGCMCall (mydev->handle,&dualreq.callinfo,sizeof(dualreq));
    }

    switch (param->function_code)
    {
        case HGCM_FN_OUT_REQUEST:
         
            sinreq.Param.type = VMMDevHGCMParmType_LinAddr_Out;
            
            sinreq.Param.u.Pointer.u.linearAddr = (RTGCPTR32)param->out_data;
            sinreq.Param.u.Pointer.size         = param->out_size;
            
            break;
        
        case HGCM_FN_IN_REQUEST:
        
            sinreq.Param.type = VMMDevHGCMParmType_LinAddr_In;
            
            sinreq.Param.u.Pointer.u.linearAddr = (RTGCPTR32)param->in_data;
            sinreq.Param.u.Pointer.size         = param->in_size;
            
            break;
        
        default:
        
            sinreq.Param.type = VMMDevHGCMParmType_LinAddr;
            
            sinreq.Param.u.Pointer.u.linearAddr = (RTGCPTR32)param->in_data;
            sinreq.Param.u.Pointer.size         = param->in_size;
    }
    
    sinreq.callinfo.u32Function = param->function_code;
    sinreq.callinfo.u32ClientID = mydev->ulClientID;
    sinreq.callinfo.cParms      = 1;

    rc = vPVbglHGCMCall (mydev->handle,&sinreq.callinfo,sizeof(sinreq));

    if (RT_SUCCESS (rc)){
        rc = sinreq.callinfo.result;
    }

    return rc;

}





------------------ Original ------------------
From: "vbox-dev-request"; 
Date: 2013年7月28日(星期天) 凌晨3:00
To: "vbox-dev"; 
Subject: vbox-dev Digest, Vol 81, Issue 26



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Today's Topics:

   1. about hgcm in linux ( ?? )


----------------------------------------------------------------------

Message: 1
Date: Sat, 27 Jul 2013 14:11:57 +0800
From: " ?? " <451105605 at qq.com>
Subject: [vbox-dev] about hgcm in linux
To: " vbox-dev " <vbox-dev at virtualbox.org>
Message-ID: <tencent_742AB1EF5BD288B30A1344E8 at qq.com>
Content-Type: text/plain; charset="gb18030"

Hi, i have a problem ? in windows ?i can send data to host in guest by use hgcm in drivers ? but ,in linux ,i can't use it in the same way ? why ?
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