https://github.com/torvalds/linux
- HEAD
- refs/heads/arm64-uaccess
- refs/heads/dependabot/pip/drivers/gpu/drm/ci/xfails/certifi-2024.7.4
- refs/heads/dependabot/pip/drivers/gpu/drm/ci/xfails/idna-3.7
- refs/heads/dependabot/pip/drivers/gpu/drm/ci/xfails/requests-2.32.2
- refs/heads/dependabot/pip/drivers/gpu/drm/ci/xfails/setuptools-70.0.0
- refs/heads/dependabot/pip/drivers/gpu/drm/ci/xfails/urllib3-2.2.2
- refs/heads/master
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Tip revision: 33cc938e65a98f1d29d0a18403dbbee050dcad9a authored by Linus Torvalds on 03 December 2023, 09:52:56 UTC
Linux 6.7-rc4
Linux 6.7-rc4
Tip revision: 33cc938
cma.h
/* SPDX-License-Identifier: GPL-2.0 */
#ifndef __CMA_H__
#define __CMA_H__
#include <linux/init.h>
#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)
#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;
extern phys_addr_t cma_get_base(const struct cma *cma);
extern unsigned long cma_get_size(const struct cma *cma);
extern const char *cma_get_name(const struct cma *cma);
extern int __init cma_declare_contiguous_nid(phys_addr_t base,
phys_addr_t size, phys_addr_t limit,
phys_addr_t alignment, unsigned int order_per_bit,
bool fixed, const char *name, struct cma **res_cma,
int nid);
static inline int __init cma_declare_contiguous(phys_addr_t base,
phys_addr_t size, phys_addr_t limit,
phys_addr_t alignment, unsigned int order_per_bit,
bool fixed, const char *name, struct cma **res_cma)
{
return cma_declare_contiguous_nid(base, size, limit, alignment,
order_per_bit, fixed, name, res_cma, NUMA_NO_NODE);
}
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, unsigned long count, unsigned int align,
bool no_warn);
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 void cma_reserve_pages_on_error(struct cma *cma);
#endif