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| author | Trond Myklebust <Trond.Myklebust@netapp.com> | 2008-03-19 21:59:44 (GMT) |
|---|---|---|
| committer | Trond Myklebust <Trond.Myklebust@netapp.com> | 2008-03-19 21:59:44 (GMT) |
| commit | c7c350e92aab1bba68f26a6027b734adcf9824ba (patch) | |
| tree | aa99bd94c3049dd871d9c030d70a5f3d87591a95 /arch/alpha/kernel | |
| parent | 2f42b5d043ee271d1e5d30ecd77186b6c4d4e534 (diff) | |
| parent | f8512ad0da16cbe156f3a7627971cdf0b39c4138 (diff) | |
| download | linux-fsl-qoriq-c7c350e92aab1bba68f26a6027b734adcf9824ba.tar.xz | |
Merge branch 'hotfixes' into devel
Diffstat (limited to 'arch/alpha/kernel')
| -rw-r--r-- | arch/alpha/kernel/pci_iommu.c | 25 |
1 files changed, 8 insertions, 17 deletions
diff --git a/arch/alpha/kernel/pci_iommu.c b/arch/alpha/kernel/pci_iommu.c index be6fa10..4e1c086 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, @@ -144,15 +137,13 @@ iommu_arena_find_pages(struct device *dev, struct pci_iommu_arena *arena, unsigned long base; unsigned long boundary_size; - BUG_ON(arena->dma_base & ~PAGE_MASK); base = arena->dma_base >> PAGE_SHIFT; - if (dev) - boundary_size = ALIGN(dma_get_max_seg_size(dev) + 1, PAGE_SIZE) - >> PAGE_SHIFT; - else - boundary_size = ALIGN(1UL << 32, PAGE_SIZE) >> PAGE_SHIFT; - - BUG_ON(!is_power_of_2(boundary_size)); + if (dev) { + boundary_size = dma_get_seg_boundary(dev) + 1; + boundary_size >>= PAGE_SHIFT; + } else { + boundary_size = 1UL << (32 - PAGE_SHIFT); + } /* Search forward for the first mask-aligned sequence of N free ptes */ ptes = arena->ptes; @@ -162,7 +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; } |