1 /* SPDX-License-Identifier: GPL-2.0 */
5 #include <linux/init.h>
6 #include <linux/types.h>
7 #include <linux/numa.h>
10 * There is always at least global CMA area and a few optional
11 * areas configured in kernel .config.
13 #ifdef CONFIG_CMA_AREAS
14 #define MAX_CMA_AREAS (1 + CONFIG_CMA_AREAS)
17 #define MAX_CMA_AREAS (0)
23 extern unsigned long totalcma_pages;
24 extern phys_addr_t cma_get_base(const struct cma *cma);
25 extern unsigned long cma_get_size(const struct cma *cma);
26 extern const char *cma_get_name(const struct cma *cma);
28 extern int __init cma_declare_contiguous_nid(phys_addr_t base,
29 phys_addr_t size, phys_addr_t limit,
30 phys_addr_t alignment, unsigned int order_per_bit,
31 bool fixed, const char *name, struct cma **res_cma,
33 static inline int __init cma_declare_contiguous(phys_addr_t base,
34 phys_addr_t size, phys_addr_t limit,
35 phys_addr_t alignment, unsigned int order_per_bit,
36 bool fixed, const char *name, struct cma **res_cma)
38 return cma_declare_contiguous_nid(base, size, limit, alignment,
39 order_per_bit, fixed, name, res_cma, NUMA_NO_NODE);
41 extern int cma_init_reserved_mem(phys_addr_t base, phys_addr_t size,
42 unsigned int order_per_bit,
44 struct cma **res_cma);
45 extern struct page *cma_alloc(struct cma *cma, size_t count, unsigned int align,
47 extern bool cma_release(struct cma *cma, const struct page *pages, unsigned int count);
49 extern int cma_for_each_area(int (*it)(struct cma *cma, void *data), void *data);