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git.proxmox.com Git - mirror_ubuntu-jammy-kernel.git/blob - include/linux/cma.h
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
);