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radeon_test_moves
 (radeon_ttm_backend_bind called through callback function)
 - radeon_ttm.c:radeon_ttm_backend_bind calls radeon_gart_bind
  - radeon_gart.c:radeon_gart_bind calls pci_map_page
   - pci_map_page is alpha_pci_map_page, which calls...
    - alpha_pci_map_page calls pci_iommu.c:pci_map_single_1
     - pci_map_single_1 calls iommu_arena_alloc
      - iommu_arena_alloc calls iommu_arena_find_pages
       - iommu_arena_find_pages returns non-0
      - iommu_arena_alloc returns non-0
     - pci_map_single_1 returns 0 after printing
       "could not allocate dma page tables" error
    - alpha_pci_map_page returns 0 from pci_map_single_1
  - radeon_gart_bind returns non-0, error path prints
    "*ERROR* failed to bind 128 pages at 0x0FF02000"

Is this the cause of the bug we're seeing in the report [1]?

Anyone know what's going wrong here?

Thanks!
Matt Turner

[1] https://bugs.freedesktop.org/show_bug.cgi?id=26403