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| author | Scott Wood <scottwood@freescale.com> | 2014-08-08 18:40:42 -0500 |
|---|---|---|
| committer | Scott Wood <scottwood@freescale.com> | 2014-09-03 17:58:21 -0500 |
| commit | 1c98025c6c95bc057a25e2c6596de23288c68160 (patch) | |
| tree | 37475259871168c9835b78ecd3d233f870945fa1 /arch/powerpc/include | |
| parent | 78eb9094ca08a40b8f9d3e113a2b88e0b7dbad1d (diff) | |
| download | linux-1c98025c6c95bc057a25e2c6596de23288c68160.tar.gz linux-1c98025c6c95bc057a25e2c6596de23288c68160.tar.bz2 linux-1c98025c6c95bc057a25e2c6596de23288c68160.zip | |
powerpc: Dynamic DMA zone limits
Platform code can call limit_zone_pfn() to set appropriate limits
for ZONE_DMA and ZONE_DMA32, and dma_direct_alloc_coherent() will
select a suitable zone based on a device's mask and the pfn limits that
platform code has configured.
Signed-off-by: Scott Wood <scottwood@freescale.com>
Cc: Shaohui Xie <Shaohui.Xie@freescale.com>
Diffstat (limited to 'arch/powerpc/include')
| -rw-r--r-- | arch/powerpc/include/asm/pgtable.h | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/arch/powerpc/include/asm/pgtable.h b/arch/powerpc/include/asm/pgtable.h index d98c1ecc3266..6d74167bb6bf 100644 --- a/arch/powerpc/include/asm/pgtable.h +++ b/arch/powerpc/include/asm/pgtable.h @@ -4,6 +4,7 @@ #ifndef __ASSEMBLY__ #include <linux/mmdebug.h> +#include <linux/mmzone.h> #include <asm/processor.h> /* For TASK_SIZE */ #include <asm/mmu.h> #include <asm/page.h> @@ -281,6 +282,8 @@ extern unsigned long empty_zero_page[]; extern pgd_t swapper_pg_dir[]; +void limit_zone_pfn(enum zone_type zone, unsigned long max_pfn); +int dma_pfn_limit_to_zone(u64 pfn_limit); extern void paging_init(void); /* |