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- Implemented ScsiPortGetPhysicalAddress for Srb buffers.

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svn path=/trunk/; revision=8463
This commit is contained in:
Hartmut Birr 2004-02-29 11:19:21 +00:00
parent 56aef8d72d
commit fc1748325f
1 changed files with 43 additions and 4 deletions
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47
reactos/drivers/storage/scsiport/scsiport.c
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@ -16,7 +16,7 @@
* along with this program; if not, write to the Free Software
* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
/* $Id: scsiport.c,v 1.46 2004/02/01 16:02:35 ekohl Exp $
/* $Id: scsiport.c,v 1.47 2004/02/29 11:19:21 hbirr Exp $
*
* COPYRIGHT: See COPYING in the top level directory
* PROJECT: ReactOS kernel
@ -413,8 +413,10 @@ ScsiPortGetPhysicalAddress(IN PVOID HwDeviceExtension,
{
PSCSI_PORT_DEVICE_EXTENSION DeviceExtension;
SCSI_PHYSICAL_ADDRESS PhysicalAddress;
SCSI_PHYSICAL_ADDRESS NextPhysicalAddress;
ULONG BufferLength = 0;
ULONG Offset;
PVOID EndAddress;
DPRINT("ScsiPortGetPhysicalAddress(%p %p %p %p)\n",
HwDeviceExtension, Srb, VirtualAddress, Length);
@ -446,9 +448,46 @@ ScsiPortGetPhysicalAddress(IN PVOID HwDeviceExtension,
}
else
{
/* FIXME */
DPRINT1("Srb != NULL is not implemented yet!\n");
UNIMPLEMENTED;
EndAddress = Srb->DataBuffer + Srb->DataTransferLength;
if (VirtualAddress == NULL)
{
VirtualAddress = Srb->DataBuffer;
}
else if (VirtualAddress < Srb->DataBuffer || VirtualAddress >= EndAddress)
{
PhysicalAddress.QuadPart = 0LL;
return PhysicalAddress;
}
PhysicalAddress = MmGetPhysicalAddress(VirtualAddress);
if (PhysicalAddress.QuadPart == 0LL)
{
return PhysicalAddress;
}
Offset = (ULONG_PTR)VirtualAddress & (PAGE_SIZE - 1);
#if 1
/*
* FIXME:
* MmGetPhysicalAddress doesn't return the offset within the page.
* We must set the correct offset.
*/
PhysicalAddress.u.LowPart = (PhysicalAddress.u.LowPart & ~(PAGE_SIZE - 1)) + Offset;
#endif
BufferLength += PAGE_SIZE - Offset;
while (VirtualAddress + BufferLength < EndAddress)
{
NextPhysicalAddress = MmGetPhysicalAddress(VirtualAddress + BufferLength);
if (PhysicalAddress.QuadPart + (ULONGLONG)BufferLength != NextPhysicalAddress.QuadPart)
{
break;
}
BufferLength += PAGE_SIZE;
}
if (VirtualAddress + BufferLength >= EndAddress)
{
BufferLength = EndAddress - VirtualAddress;
}
}
*Length = BufferLength;