1 files changed, 61 insertions, 0 deletions
diff --git a/include/linux/io-pgtable-fast.h b/include/linux/io-pgtable-fast.h
new file mode 100644
index 000000000000..6a56f0039f15
--- /dev/null
+++ b/include/linux/io-pgtable-fast.h
@@ -0,0 +1,61 @@
+/* Copyright (c) 2016-2017, The Linux Foundation. All rights reserved.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 and
+ * only version 2 as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ */
+
+#ifndef __LINUX_IO_PGTABLE_FAST_H
+#define __LINUX_IO_PGTABLE_FAST_H
+
+#include <linux/notifier.h>
+
+typedef u64 av8l_fast_iopte;
+
+#define iopte_pmd_offset(pmds, base, iova) (pmds + ((iova - base) >> 12))
+
+int av8l_fast_map_public(av8l_fast_iopte *ptep, phys_addr_t paddr, size_t size,
+			 int prot);
+void av8l_fast_unmap_public(av8l_fast_iopte *ptep, size_t size);
+
+/* events for notifiers passed to av8l_register_notify */
+#define MAPPED_OVER_STALE_TLB 1
+
+
+#ifdef CONFIG_IOMMU_IO_PGTABLE_FAST_PROVE_TLB
+/*
+ * Doesn't matter what we use as long as bit 0 is unset.  The reason why we
+ * need a different value at all is that there are certain hardware
+ * platforms with erratum that require that a PTE actually be zero'd out
+ * and not just have its valid bit unset.
+ */
+#define AV8L_FAST_PTE_UNMAPPED_NEED_TLBI 0xa
+
+void av8l_fast_clear_stale_ptes(av8l_fast_iopte *puds, u64 base,
+				u64 start, u64 end, bool skip_sync);
+void av8l_register_notify(struct notifier_block *nb);
+
+#else  /* !CONFIG_IOMMU_IO_PGTABLE_FAST_PROVE_TLB */
+
+#define AV8L_FAST_PTE_UNMAPPED_NEED_TLBI 0
+
+static inline void av8l_fast_clear_stale_ptes(av8l_fast_iopte *puds,
+					      u64 base,
+					      u64 start,
+					      u64 end,
+					      bool skip_sync)
+{
+}
+
+static inline void av8l_register_notify(struct notifier_block *nb)
+{
+}
+
+#endif	/* CONFIG_IOMMU_IO_PGTABLE_FAST_PROVE_TLB */
+
+#endif /* __LINUX_IO_PGTABLE_FAST_H */