105 lines
2.7 KiB
C
105 lines
2.7 KiB
C
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/* SPDX-License-Identifier: GPL-2.0-only */
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/*
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* Copyright (c) 2017, The Linux Foundation. All rights reserved.
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*/
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#ifndef __LINUX_IO_PGTABLE_FAST_H
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#define __LINUX_IO_PGTABLE_FAST_H
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#include <linux/notifier.h>
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/*
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* This ought to be private to io-pgtable-fast, but dma-mapping-fast
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* currently requires it for a debug usecase.
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*/
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typedef u64 av8l_fast_iopte;
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struct io_pgtable_ops;
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#ifdef CONFIG_IOMMU_IO_PGTABLE_FAST
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int av8l_fast_map_public(struct io_pgtable_ops *ops, unsigned long iova,
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phys_addr_t paddr, size_t size, int prot);
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void av8l_fast_unmap_public(struct io_pgtable_ops *ops, unsigned long iova,
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size_t size);
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int av8l_fast_map_sg_public(struct io_pgtable_ops *ops,
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unsigned long iova, struct scatterlist *sgl,
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unsigned int nents, int prot, size_t *size);
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bool av8l_fast_iova_coherent_public(struct io_pgtable_ops *ops,
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unsigned long iova);
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phys_addr_t av8l_fast_iova_to_phys_public(struct io_pgtable_ops *ops,
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unsigned long iova);
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#else
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static inline int
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av8l_fast_map_public(struct io_pgtable_ops *ops, unsigned long iova,
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phys_addr_t paddr, size_t size, int prot)
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{
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return -EINVAL;
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}
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static inline void av8l_fast_unmap_public(struct io_pgtable_ops *ops,
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unsigned long iova, size_t size)
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{
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}
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static inline int av8l_fast_map_sg_public(struct io_pgtable_ops *ops,
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unsigned long iova, struct scatterlist *sgl,
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unsigned int nents, int prot, size_t *size)
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{
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return 0;
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}
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static inline bool av8l_fast_iova_coherent_public(struct io_pgtable_ops *ops,
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unsigned long iova)
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{
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return false;
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}
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static inline phys_addr_t
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av8l_fast_iova_to_phys_public(struct io_pgtable_ops *ops,
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unsigned long iova)
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{
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return 0;
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}
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#endif /* CONFIG_IOMMU_IO_PGTABLE_FAST */
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/* events for notifiers passed to av8l_register_notify */
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#define MAPPED_OVER_STALE_TLB 1
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#ifdef CONFIG_IOMMU_IO_PGTABLE_FAST_PROVE_TLB
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/*
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* Doesn't matter what we use as long as bit 0 is unset. The reason why we
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* need a different value at all is that there are certain hardware
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* platforms with erratum that require that a PTE actually be zero'd out
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* and not just have its valid bit unset.
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*/
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#define AV8L_FAST_PTE_UNMAPPED_NEED_TLBI 0xa
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void av8l_fast_clear_stale_ptes(struct io_pgtable_ops *ops, u64 base,
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u64 start, u64 end, bool skip_sync);
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void av8l_register_notify(struct notifier_block *nb);
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#else /* !CONFIG_IOMMU_IO_PGTABLE_FAST_PROVE_TLB */
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#define AV8L_FAST_PTE_UNMAPPED_NEED_TLBI 0
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static inline void av8l_fast_clear_stale_ptes(struct io_pgtable_ops *ops,
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u64 base,
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u64 start,
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u64 end,
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bool skip_sync)
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{
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}
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static inline void av8l_register_notify(struct notifier_block *nb)
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{
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}
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#endif /* CONFIG_IOMMU_IO_PGTABLE_FAST_PROVE_TLB */
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#endif /* __LINUX_IO_PGTABLE_FAST_H */
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