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| author | Mark McLoughlin <markmc@redhat.com> | 2008-11-20 16:49:44 +0100 |
|---|---|---|
| committer | Joerg Roedel <joerg.roedel@amd.com> | 2009-01-03 11:57:35 +0100 |
| commit | 46b08e1a76b758193b0e7b889c6486a16eb1e9e2 (patch) | |
| tree | 0a71af4a4bef41e512adabdd0d343c1aa1c8e103 /drivers/pci | |
| parent | intel-iommu: move DMA_32/64BIT_PFN into intel-iommu.c (diff) | |
| download | linux-46b08e1a76b758193b0e7b889c6486a16eb1e9e2.tar.xz linux-46b08e1a76b758193b0e7b889c6486a16eb1e9e2.zip | |
intel-iommu: move root entry defs from dma_remapping.h
We keep the struct root_entry forward declaration for the
pointer in struct intel_iommu.
Signed-off-by: Mark McLoughlin <markmc@redhat.com>
Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
Diffstat (limited to 'drivers/pci')
| -rw-r--r-- | drivers/pci/intel-iommu.c | 33 |
1 files changed, 33 insertions, 0 deletions
diff --git a/drivers/pci/intel-iommu.c b/drivers/pci/intel-iommu.c index 6fadbb9bc180..29bf2d8176e2 100644 --- a/drivers/pci/intel-iommu.c +++ b/drivers/pci/intel-iommu.c @@ -57,6 +57,39 @@ #define DMA_32BIT_PFN IOVA_PFN(DMA_32BIT_MASK) #define DMA_64BIT_PFN IOVA_PFN(DMA_64BIT_MASK) +/* + * 0: Present + * 1-11: Reserved + * 12-63: Context Ptr (12 - (haw-1)) + * 64-127: Reserved + */ +struct root_entry { + u64 val; + u64 rsvd1; +}; +#define ROOT_ENTRY_NR (VTD_PAGE_SIZE/sizeof(struct root_entry)) +static inline bool root_present(struct root_entry *root) +{ + return (root->val & 1); +} +static inline void set_root_present(struct root_entry *root) +{ + root->val |= 1; +} +static inline void set_root_value(struct root_entry *root, unsigned long value) +{ + root->val |= value & VTD_PAGE_MASK; +} + +static inline struct context_entry * +get_context_addr_from_root(struct root_entry *root) +{ + return (struct context_entry *) + (root_present(root)?phys_to_virt( + root->val & VTD_PAGE_MASK) : + NULL); +} + static void flush_unmaps_timeout(unsigned long data); DEFINE_TIMER(unmap_timer, flush_unmaps_timeout, 0, 0); |