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Better support for dma_addr_t variables

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A while back, we introduced the dma_addr_t type, which is supposed to
be used for bus visible memory addresses.  At present, this is an
alias for target_phys_addr_t, but this will change when we eventually
add support for guest visible IOMMUs.

There are some instances of target_phys_addr_t in the code now which
should really be dma_addr_t, but can't be trivially converted due to
missing features which this patch corrects.

 * We add DMA_ADDR_BITS analagous to TARGET_PHYS_ADDR_BITS.  This is
   important where we need to make a compile-time (#if) based on the
   size of dma_addr_t.

 * We add a new helper macro to create device properties which take a
   dma_addr_t, currently an alias to DEFINE_PROP_TADDR().

Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
This commit is contained in:
David Gibson 2012-06-27 14:50:37 +10:00 committed by Anthony Liguori
parent fcce6fd25f
commit 8292f75ad2
2 changed files with 13 additions and 0 deletions
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1
dma.h
View File

@ -31,6 +31,7 @@ struct QEMUSGList {
#if defined(TARGET_PHYS_ADDR_BITS)
typedef target_phys_addr_t dma_addr_t;
#define DMA_ADDR_BITS TARGET_PHYS_ADDR_BITS
#define DMA_ADDR_FMT TARGET_FMT_plx
struct ScatterGatherEntry {

12
hw/qdev-dma.h Normal file
View File

@ -0,0 +1,12 @@
/*
* Support for dma_addr_t typed properties
*
* Copyright (C) 2012 David Gibson, IBM Corporation.
*
* This work is licensed under the terms of the GNU GPL, version 2 or later.
* See the COPYING file in the top-level directory.
*/
#include "qdev-addr.h"
#define DEFINE_PROP_DMAADDR(_n, _s, _f, _d) \
DEFINE_PROP_TADDR(_n, _s, _f, _d)