diff options
| author |   Jan Glauber <jang@linux.vnet.ibm.com> | 2012-11-29 14:33:30 +0100 |
|---|---|---|
| committer |   Martin Schwidefsky <schwidefsky@de.ibm.com> | 2012-11-30 17:47:23 +0100 |
| commit | 828b35f60eb0148f994bb13e328df94578b07142 (patch) | |
| tree | 2e06065339ebbfb9aab46f3167fe77ac952ac6fa /arch/s390/include/asm/dma.h | |
| parent | s390/pci: PCI adapter interrupts for MSI/MSI-X (diff) | |
| download | linux-dev-828b35f60eb0148f994bb13e328df94578b07142.tar.xz linux-dev-828b35f60eb0148f994bb13e328df94578b07142.zip | |
s390/pci: DMA support
Add DMA IOMMU support using 4K page table entries. Implement dma_map_ops.
Signed-off-by: Jan Glauber <jang@linux.vnet.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
Diffstat (limited to 'arch/s390/include/asm/dma.h')
| -rw-r--r-- | arch/s390/include/asm/dma.h | 19 |
1 files changed, 9 insertions, 10 deletions
diff --git a/arch/s390/include/asm/dma.h b/arch/s390/include/asm/dma.h index 6fb6de4f15b0..de015d85e3e5 100644 --- a/arch/s390/include/asm/dma.h +++ b/arch/s390/include/asm/dma.h @@ -1,14 +1,13 @@ -/* - * S390 version - */ - -#ifndef _ASM_DMA_H -#define _ASM_DMA_H +#ifndef _ASM_S390_DMA_H +#define _ASM_S390_DMA_H -#include <asm/io.h> /* need byte IO */ +#include <asm/io.h> +/* + * MAX_DMA_ADDRESS is ambiguous because on s390 its completely unrelated + * to DMA. It _is_ used for the s390 memory zone split at 2GB caused + * by the 31 bit heritage. + */ #define MAX_DMA_ADDRESS 0x80000000 -#define free_dma(x) do { } while (0) - -#endif /* _ASM_DMA_H */ +#endif /* _ASM_S390_DMA_H */ |