| Message ID | 1320041218-30487-2-git-send-email-david@gibson.dropbear.id.au |
|---|---|
| State | New |
| Headers | show |
On 10/31/2011 01:06 AM, David Gibson wrote: > As a preliminary to adding more extensive DMA and IOMMU infrastructure > support into qemu, this patch defines a dma_addr_t for storing DMA bus > addresses and a DMADirection enum which describes whether a DMA is > from an external device to main memory or from main memory to an > external device. > > For now dma_addr_t is just defined to be target_phys_addr_t, but in > future, we can change this to support machines where we have bus > addresses which don't necessarily have the same format as CPU physical > addresses. > > Signed-off-by: David Gibson<david@gibson.dropbear.id.au> Applied all. Thanks. Regards, Anthony Liguori > --- > dma.h | 9 +++++++++ > 1 files changed, 9 insertions(+), 0 deletions(-) > > diff --git a/dma.h b/dma.h > index 2bdc236..56e163a 100644 > --- a/dma.h > +++ b/dma.h > @@ -18,6 +18,15 @@ > typedef struct ScatterGatherEntry ScatterGatherEntry; > > #if defined(TARGET_PHYS_ADDR_BITS) > +typedef target_phys_addr_t dma_addr_t; > + > +#define DMA_ADDR_FMT TARGET_FMT_plx > + > +typedef enum { > + DMA_DIRECTION_TO_DEVICE = 0, > + DMA_DIRECTION_FROM_DEVICE = 1, > +} DMADirection; > + > struct ScatterGatherEntry { > target_phys_addr_t base; > target_phys_addr_t len;
diff --git a/dma.h b/dma.h index 2bdc236..56e163a 100644 --- a/dma.h +++ b/dma.h @@ -18,6 +18,15 @@ typedef struct ScatterGatherEntry ScatterGatherEntry; #if defined(TARGET_PHYS_ADDR_BITS) +typedef target_phys_addr_t dma_addr_t; + +#define DMA_ADDR_FMT TARGET_FMT_plx + +typedef enum { + DMA_DIRECTION_TO_DEVICE = 0, + DMA_DIRECTION_FROM_DEVICE = 1, +} DMADirection; + struct ScatterGatherEntry { target_phys_addr_t base; target_phys_addr_t len;
As a preliminary to adding more extensive DMA and IOMMU infrastructure support into qemu, this patch defines a dma_addr_t for storing DMA bus addresses and a DMADirection enum which describes whether a DMA is from an external device to main memory or from main memory to an external device. For now dma_addr_t is just defined to be target_phys_addr_t, but in future, we can change this to support machines where we have bus addresses which don't necessarily have the same format as CPU physical addresses. Signed-off-by: David Gibson <david@gibson.dropbear.id.au> --- dma.h | 9 +++++++++ 1 files changed, 9 insertions(+), 0 deletions(-)