AMD IOMMU: add necessary header defines for stats counting
Impact: add defines to make iommu stats collection configurable
Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
diff --git a/arch/x86/include/asm/amd_iommu_types.h b/arch/x86/include/asm/amd_iommu_types.h
index 7abf9cf..1379c5f 100644
--- a/arch/x86/include/asm/amd_iommu_types.h
+++ b/arch/x86/include/asm/amd_iommu_types.h
@@ -396,4 +396,30 @@
return (((u16)bus) << 8) | devfn;
}
+#ifdef CONFIG_AMD_IOMMU_STATS
+
+struct __iommu_counter {
+ char *name;
+ struct dentry *dent;
+ u64 value;
+};
+
+#define DECLARE_STATS_COUNTER(nm) \
+ static struct __iommu_counter nm = { \
+ .name = #nm, \
+ }
+
+#define INC_STATS_COUNTER(name) name.value += 1
+#define ADD_STATS_COUNTER(name, x) name.value += (x)
+#define SUB_STATS_COUNTER(name, x) name.value -= (x)
+
+#else /* CONFIG_AMD_IOMMU_STATS */
+
+#define DECLARE_STATS_COUNTER(name)
+#define INC_STATS_COUNTER(name)
+#define ADD_STATS_COUNTER(name, x)
+#define SUB_STATS_COUNTER(name, x)
+
+#endif /* CONFIG_AMD_IOMMU_STATS */
+
#endif /* _ASM_X86_AMD_IOMMU_TYPES_H */