iommu/vt-d: Relocate struct/function declarations to its header files

To reuse the static functions and the struct declarations, move them to
corresponding header files and export the needed functions.

Cc: Lu Baolu <baolu.lu@linux.intel.com>
Cc: Fenghua Yu <fenghua.yu@intel.com>
Cc: Jacob Pan <jacob.jun.pan@linux.intel.com>
Cc: Ashok Raj <ashok.raj@intel.com>
Reviewed-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Signed-off-by: Gayatri Kammela <gayatri.kammela@intel.com>
Signed-off-by: Sohil Mehta <sohil.mehta@intel.com>
Signed-off-by: Joerg Roedel <jroedel@suse.de>

1 files changed, 30 insertions, 0 deletions

diff --git a/include/linux/intel-iommu.h b/include/linux/intel-iommu.h
index 28004d74ae04..b7cf32e8ae1f 100644
--- a/include/linux/intel-iommu.h
+++ b/include/linux/intel-iommu.h
@@ -389,6 +389,33 @@ struct pasid_entry;
 struct pasid_state_entry;
 struct page_req_dsc;
 
+/*
+ * 0: Present
+ * 1-11: Reserved
+ * 12-63: Context Ptr (12 - (haw-1))
+ * 64-127: Reserved
+ */
+struct root_entry {
+	u64     lo;
+	u64     hi;
+};
+
+/*
+ * low 64 bits:
+ * 0: present
+ * 1: fault processing disable
+ * 2-3: translation type
+ * 12-63: address space root
+ * high 64 bits:
+ * 0-2: address width
+ * 3-6: aval
+ * 8-23: domain id
+ */
+struct context_entry {
+	u64 lo;
+	u64 hi;
+};
+
 struct dmar_domain {
 	int	nid;			/* node id */
 
@@ -559,5 +586,8 @@ extern struct intel_iommu *intel_svm_device_to_iommu(struct device *dev);
 #endif
 
 extern const struct attribute_group *intel_iommu_groups[];
+bool context_present(struct context_entry *context);
+struct context_entry *iommu_context_addr(struct intel_iommu *iommu, u8 bus,
+					 u8 devfn, int alloc);
 
 #endif