diff options
Diffstat (limited to 'include/linux/cma.h')
-rw-r--r-- | include/linux/cma.h | 50 |
1 files changed, 39 insertions, 11 deletions
diff --git a/include/linux/cma.h b/include/linux/cma.h index 217999c8a762..62d9c1cf6326 100644 --- a/include/linux/cma.h +++ b/include/linux/cma.h @@ -6,20 +6,20 @@ #include <linux/types.h> #include <linux/numa.h> -/* - * There is always at least global CMA area and a few optional - * areas configured in kernel .config. - */ #ifdef CONFIG_CMA_AREAS -#define MAX_CMA_AREAS (1 + CONFIG_CMA_AREAS) - -#else -#define MAX_CMA_AREAS (0) - +#define MAX_CMA_AREAS CONFIG_CMA_AREAS #endif #define CMA_MAX_NAME 64 +/* + * the buddy -- especially pageblock merging and alloc_contig_range() + * -- can deal with only some pageblocks of a higher-order page being + * MIGRATE_CMA, we can use pageblock_nr_pages. + */ +#define CMA_MIN_ALIGNMENT_PAGES pageblock_nr_pages +#define CMA_MIN_ALIGNMENT_BYTES (PAGE_SIZE * CMA_MIN_ALIGNMENT_PAGES) + struct cma; extern unsigned long totalcma_pages; @@ -40,13 +40,41 @@ static inline int __init cma_declare_contiguous(phys_addr_t base, return cma_declare_contiguous_nid(base, size, limit, alignment, order_per_bit, fixed, name, res_cma, NUMA_NO_NODE); } +extern int __init cma_declare_contiguous_multi(phys_addr_t size, + phys_addr_t align, unsigned int order_per_bit, + const char *name, struct cma **res_cma, int nid); extern int cma_init_reserved_mem(phys_addr_t base, phys_addr_t size, unsigned int order_per_bit, const char *name, struct cma **res_cma); -extern struct page *cma_alloc(struct cma *cma, size_t count, unsigned int align, +extern struct page *cma_alloc(struct cma *cma, unsigned long count, unsigned int align, bool no_warn); -extern bool cma_release(struct cma *cma, const struct page *pages, unsigned int count); +extern bool cma_pages_valid(struct cma *cma, const struct page *pages, unsigned long count); +extern bool cma_release(struct cma *cma, const struct page *pages, unsigned long count); extern int cma_for_each_area(int (*it)(struct cma *cma, void *data), void *data); +extern bool cma_intersects(struct cma *cma, unsigned long start, unsigned long end); + +extern void cma_reserve_pages_on_error(struct cma *cma); + +#ifdef CONFIG_CMA +struct folio *cma_alloc_folio(struct cma *cma, int order, gfp_t gfp); +bool cma_free_folio(struct cma *cma, const struct folio *folio); +bool cma_validate_zones(struct cma *cma); +#else +static inline struct folio *cma_alloc_folio(struct cma *cma, int order, gfp_t gfp) +{ + return NULL; +} + +static inline bool cma_free_folio(struct cma *cma, const struct folio *folio) +{ + return false; +} +static inline bool cma_validate_zones(struct cma *cma) +{ + return false; +} +#endif + #endif |