44 lines
1.2 KiB
C
44 lines
1.2 KiB
C
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/* SPDX-License-Identifier: GPL-2.0 */
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#ifndef __GCMA_H__
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#define __GCMA_H__
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#include <linux/types.h>
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#ifdef CONFIG_GCMA
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enum gcma_stat_type {
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ALLOCATED_PAGE,
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STORED_PAGE,
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LOADED_PAGE,
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EVICTED_PAGE,
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CACHED_PAGE,
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DISCARDED_PAGE,
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TOTAL_PAGE,
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NUM_OF_GCMA_STAT,
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};
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#ifdef CONFIG_GCMA_SYSFS
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u64 gcma_stat_get(enum gcma_stat_type type);
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#else
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static inline u64 gcma_stat_get(enum gcma_stat_type type) { return 0; }
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#endif
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/*
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* NOTE: allocated pages are still marked reserved and when freeing them
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* the caller should ensure they are isolated and not referenced by anyone
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* other than the caller.
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*/
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extern void gcma_alloc_range(unsigned long start_pfn, unsigned long end_pfn);
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extern void gcma_free_range(unsigned long start_pfn, unsigned long end_pfn);
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extern int register_gcma_area(const char *name, phys_addr_t base,
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phys_addr_t size);
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#else
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static inline void gcma_alloc_range(unsigned long start_pfn,
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unsigned long end_pfn) {}
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static inline void gcma_free_range(unsigned long start_pfn,
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unsigned long end_pfn) {}
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static inline int register_gcma_area(const char *name, phys_addr_t base,
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phys_addr_t size) { return -EINVAL; }
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#endif
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#endif
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