Merge tag 'armsoc-dt' of git://git.kernel.org/pub/scm/linux/kernel/git/soc/soc

[platform/kernel/linux-starfive.git] / drivers / iommu / intel-pasid.h

diff --git a/drivers/iommu/intel-pasid.h b/drivers/iommu/intel-pasid.h
index 23537b3..fc8cd8f 100644 (file)
--- a/drivers/iommu/intel-pasid.h
+++ b/drivers/iommu/intel-pasid.h
@@ -18,6 +18,10 @@
 #define PDE_PFN_MASK                   PAGE_MASK
 #define PASID_PDE_SHIFT                        6
 #define MAX_NR_PASID_BITS              20
+#define PASID_TBL_ENTRIES              BIT(PASID_PDE_SHIFT)
+
+#define is_pasid_enabled(entry)                (((entry)->lo >> 3) & 0x1)
+#define get_pasid_dir_size(entry)      (1 << ((((entry)->lo >> 9) & 0x7) + 7))
 
 /*
  * Domain ID reserved for pasid entries programmed for first-level
@@ -49,6 +53,28 @@ struct pasid_table {
        struct list_head        dev;            /* device list */
 };
 
+/* Get PRESENT bit of a PASID directory entry. */
+static inline bool pasid_pde_is_present(struct pasid_dir_entry *pde)
+{
+       return READ_ONCE(pde->val) & PASID_PTE_PRESENT;
+}
+
+/* Get PASID table from a PASID directory entry. */
+static inline struct pasid_entry *
+get_pasid_table_from_pde(struct pasid_dir_entry *pde)
+{
+       if (!pasid_pde_is_present(pde))
+               return NULL;
+
+       return phys_to_virt(READ_ONCE(pde->val) & PDE_PFN_MASK);
+}
+
+/* Get PRESENT bit of a PASID table entry. */
+static inline bool pasid_pte_is_present(struct pasid_entry *pte)
+{
+       return READ_ONCE(pte->val[0]) & PASID_PTE_PRESENT;
+}
+
 extern u32 intel_pasid_max_id;
 int intel_pasid_alloc_id(void *ptr, int start, int end, gfp_t gfp);
 void intel_pasid_free_id(int pasid);