xiaomi-sm8450/android_kernel_xiaomi_sm8450
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

s390/pci: DMA support

Browse Source 
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>
This commit is contained in:
Jan Glauber
2012-11-29 14:33:30 +01:00
committed by Martin Schwidefsky
parent 9a4da8a5b1
commit 828b35f60e
8 changed files with 848 additions and 11 deletions
Download Patch File Download Diff File Expand all files Collapse all files

19
arch/s390/include/asm/dma.h
View File

@@ -1,14 +1,13 @@
#ifndef _ASM_S390_DMA_H
#define _ASM_S390_DMA_H
#include <asm/io.h>
/*
* S390 version
* 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.
*/
#ifndef _ASM_DMA_H
#define _ASM_DMA_H
#include <asm/io.h> /* need byte IO */
#define MAX_DMA_ADDRESS 0x80000000
#define free_dma(x) do { } while (0)
#endif /* _ASM_DMA_H */
#endif /* _ASM_S390_DMA_H */