diff options
Diffstat (limited to 'arch/ia64/lib/swiotlb.c')
| -rw-r--r-- | arch/ia64/lib/swiotlb.c | 16 |
1 files changed, 13 insertions, 3 deletions
diff --git a/arch/ia64/lib/swiotlb.c b/arch/ia64/lib/swiotlb.c index e4770828db59..d38b01538184 100644 --- a/arch/ia64/lib/swiotlb.c +++ b/arch/ia64/lib/swiotlb.c @@ -61,9 +61,8 @@ static char *io_tlb_start, *io_tlb_end; /* * The number of IO TLB blocks (in groups of 64) betweeen io_tlb_start and * io_tlb_end. This is command line adjustable via setup_io_tlb_npages. - * Default to 64MB. */ -static unsigned long io_tlb_nslabs = 32768; +static unsigned long io_tlb_nslabs; /* * When the IOMMU overflows we return a fallback buffer. This sets the size. @@ -113,10 +112,15 @@ __setup("swiotlb=", setup_io_tlb_npages); * structures for the software IO TLB used to implement the PCI DMA API. */ void -swiotlb_init(void) +swiotlb_init_with_default_size (size_t default_size) { unsigned long i; + if (!io_tlb_nslabs) { + io_tlb_nslabs = (default_size >> PAGE_SHIFT); + io_tlb_nslabs = ALIGN(io_tlb_nslabs, IO_TLB_SEGSIZE); + } + /* * Get IO TLB memory from the low pages */ @@ -145,6 +149,12 @@ swiotlb_init(void) virt_to_phys(io_tlb_start), virt_to_phys(io_tlb_end)); } +void +swiotlb_init (void) +{ + swiotlb_init_with_default_size(64 * (1<<20)); /* default to 64MB */ +} + static inline int address_needs_mapping(struct device *hwdev, dma_addr_t addr) { |