diff options
Diffstat (limited to 'arch/alpha')
| -rw-r--r-- | arch/alpha/Kconfig | 3 | ||||
| -rw-r--r-- | arch/alpha/kernel/pci_iommu.c | 12 |
2 files changed, 5 insertions, 10 deletions
diff --git a/arch/alpha/Kconfig b/arch/alpha/Kconfig index 002703b8c0b..729cdbdf803 100644 --- a/arch/alpha/Kconfig +++ b/arch/alpha/Kconfig @@ -330,6 +330,9 @@ config PCI_DOMAINS config PCI_SYSCALL def_bool PCI +config IOMMU_HELPER + def_bool PCI + config ALPHA_CORE_AGP bool depends on ALPHA_GENERIC || ALPHA_TITAN || ALPHA_MARVEL diff --git a/arch/alpha/kernel/pci_iommu.c b/arch/alpha/kernel/pci_iommu.c index e07a23fc5b7..4e1c08636ed 100644 --- a/arch/alpha/kernel/pci_iommu.c +++ b/arch/alpha/kernel/pci_iommu.c @@ -10,6 +10,7 @@ #include <linux/scatterlist.h> #include <linux/log2.h> #include <linux/dma-mapping.h> +#include <linux/iommu-helper.h> #include <asm/io.h> #include <asm/hwrpb.h> @@ -125,14 +126,6 @@ iommu_arena_new(struct pci_controller *hose, dma_addr_t base, return iommu_arena_new_node(0, hose, base, window_size, align); } -static inline int is_span_boundary(unsigned int index, unsigned int nr, - unsigned long shift, - unsigned long boundary_size) -{ - shift = (shift + index) & (boundary_size - 1); - return shift + nr > boundary_size; -} - /* Must be called with the arena lock held */ static long iommu_arena_find_pages(struct device *dev, struct pci_iommu_arena *arena, @@ -147,7 +140,6 @@ iommu_arena_find_pages(struct device *dev, struct pci_iommu_arena *arena, base = arena->dma_base >> PAGE_SHIFT; if (dev) { boundary_size = dma_get_seg_boundary(dev) + 1; - BUG_ON(!is_power_of_2(boundary_size)); boundary_size >>= PAGE_SHIFT; } else { boundary_size = 1UL << (32 - PAGE_SHIFT); @@ -161,7 +153,7 @@ iommu_arena_find_pages(struct device *dev, struct pci_iommu_arena *arena, again: while (i < n && p+i < nent) { - if (!i && is_span_boundary(p, n, base, boundary_size)) { + if (!i && iommu_is_span_boundary(p, n, base, boundary_size)) { p = ALIGN(p + 1, mask + 1); goto again; } |