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59 lines
2.0 KiB
59 lines
2.0 KiB
/* SPDX-License-Identifier: GPL-2.0 */ |
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#ifndef __CMA_H__ |
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#define __CMA_H__ |
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#include <linux/init.h> |
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#include <linux/types.h> |
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#include <linux/numa.h> |
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/* |
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* There is always at least global CMA area and a few optional |
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* areas configured in kernel .config. |
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*/ |
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#ifdef CONFIG_CMA_AREAS |
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#define MAX_CMA_AREAS (1 + CONFIG_CMA_AREAS) |
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#endif |
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#define CMA_MAX_NAME 64 |
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/* |
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* the buddy -- especially pageblock merging and alloc_contig_range() |
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* -- can deal with only some pageblocks of a higher-order page being |
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* MIGRATE_CMA, we can use pageblock_nr_pages. |
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*/ |
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#define CMA_MIN_ALIGNMENT_PAGES pageblock_nr_pages |
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#define CMA_MIN_ALIGNMENT_BYTES (PAGE_SIZE * CMA_MIN_ALIGNMENT_PAGES) |
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struct cma; |
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extern unsigned long totalcma_pages; |
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extern phys_addr_t cma_get_base(const struct cma *cma); |
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extern unsigned long cma_get_size(const struct cma *cma); |
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extern const char *cma_get_name(const struct cma *cma); |
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extern int __init cma_declare_contiguous_nid(phys_addr_t base, |
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phys_addr_t size, phys_addr_t limit, |
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phys_addr_t alignment, unsigned int order_per_bit, |
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bool fixed, const char *name, struct cma **res_cma, |
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int nid); |
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static inline int __init cma_declare_contiguous(phys_addr_t base, |
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phys_addr_t size, phys_addr_t limit, |
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phys_addr_t alignment, unsigned int order_per_bit, |
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bool fixed, const char *name, struct cma **res_cma) |
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{ |
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return cma_declare_contiguous_nid(base, size, limit, alignment, |
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order_per_bit, fixed, name, res_cma, NUMA_NO_NODE); |
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} |
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extern int cma_init_reserved_mem(phys_addr_t base, phys_addr_t size, |
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unsigned int order_per_bit, |
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const char *name, |
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struct cma **res_cma); |
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extern struct page *cma_alloc(struct cma *cma, unsigned long count, unsigned int align, |
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bool no_warn); |
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extern bool cma_pages_valid(struct cma *cma, const struct page *pages, unsigned long count); |
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extern bool cma_release(struct cma *cma, const struct page *pages, unsigned long count); |
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extern int cma_for_each_area(int (*it)(struct cma *cma, void *data), void *data); |
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extern void cma_reserve_pages_on_error(struct cma *cma); |
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#endif
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