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authorMark McLoughlin <markmc@redhat.com>2008-11-20 15:49:44 +0000
committerJoerg Roedel <joerg.roedel@amd.com>2009-01-03 11:57:35 +0100
commit46b08e1a76b758193b0e7b889c6486a16eb1e9e2 (patch)
tree0a71af4a4bef41e512adabdd0d343c1aa1c8e103 /drivers
parentf27be03b271851fd54529f292c0f25b4c1f1a553 (diff)
downloadlinux-46b08e1a76b758193b0e7b889c6486a16eb1e9e2.tar.bz2
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')
-rw-r--r--drivers/pci/intel-iommu.c33
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);