diff options
| author | Lars-Peter Clausen <lars@metafoo.de> | 2014-12-03 16:07:28 +0100 |
|---|---|---|
| committer | Michal Simek <michal.simek@xilinx.com> | 2014-12-17 12:59:59 +0100 |
| commit | 3a8e3265179b7e6394d7aab4d6df5651b49e7243 (patch) | |
| tree | 82194a886cb05fe27ba3ddf0dca4ec05c3977e4a /arch/microblaze/include | |
| parent | b2776bf7149bddd1f4161f14f79520f17fc1d71d (diff) | |
microblaze: Fix mmap for cache coherent memory
When running in non-cache coherent configuration the memory that was
allocated with dma_alloc_coherent() has a custom mapping and so there is no
1-to-1 relationship between the kernel virtual address and the PFN. This
means that virt_to_pfn() will not work correctly for those addresses and the
default mmap implementation in the form of dma_common_mmap() will map some
random, but not the requested, memory area.
Fix this by providing a custom mmap implementation that looks up the PFN
from the page table rather than using virt_to_pfn.
Signed-off-by: Lars-Peter Clausen <lars@metafoo.de>
Signed-off-by: Michal Simek <michal.simek@xilinx.com>
Diffstat (limited to 'arch/microblaze/include')
| -rw-r--r-- | arch/microblaze/include/asm/pgtable.h | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/arch/microblaze/include/asm/pgtable.h b/arch/microblaze/include/asm/pgtable.h index 95cef0b5f83..df19d0c47be 100644 --- a/arch/microblaze/include/asm/pgtable.h +++ b/arch/microblaze/include/asm/pgtable.h @@ -565,6 +565,7 @@ void consistent_free(size_t size, void *vaddr); void consistent_sync(void *vaddr, size_t size, int direction); void consistent_sync_page(struct page *page, unsigned long offset, size_t size, int direction); +unsigned long consistent_virt_to_pfn(void *vaddr); void setup_memory(void); #endif /* __ASSEMBLY__ */ |