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/* Copyright (c) 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>
/*
* This ought to be private to io-pgtable-fast, but dma-mapping-fast
* currently requires it for a debug usecase.
*/
typedef u64 av8l_fast_iopte;
struct io_pgtable_ops;
#ifdef CONFIG_IOMMU_IO_PGTABLE_FAST
int av8l_fast_map_public(struct io_pgtable_ops *ops, unsigned long iova,
phys_addr_t paddr, size_t size, int prot);
void av8l_fast_unmap_public(struct io_pgtable_ops *ops, unsigned long iova,
size_t size);
bool av8l_fast_iova_coherent_public(struct io_pgtable_ops *ops,
unsigned long iova);
phys_addr_t av8l_fast_iova_to_phys_public(struct io_pgtable_ops *ops,
unsigned long iova);
#else
static inline int
av8l_fast_map_public(struct io_pgtable_ops *ops, unsigned long iova,
phys_addr_t paddr, size_t size, int prot)
{
return -EINVAL;
}
static inline void av8l_fast_unmap_public(struct io_pgtable_ops *ops,
unsigned long iova, size_t size)
{
}
static inline bool av8l_fast_iova_coherent_public(struct io_pgtable_ops *ops,
unsigned long iova)
{
return false;
}
static inline phys_addr_t
av8l_fast_iova_to_phys_public(struct io_pgtable_ops *ops,
unsigned long iova)
{
return 0;
}
#endif /* CONFIG_IOMMU_IO_PGTABLE_FAST */
/* 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(struct io_pgtable_ops *ops, 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(struct io_pgtable_ops *ops,
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 */
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