From 2c3c1048746a4622d8c89a29670120dc8fab93c4 Mon Sep 17 00:00:00 2001 From: Daniel Baumann Date: Sun, 7 Apr 2024 20:49:45 +0200 Subject: Adding upstream version 6.1.76. Signed-off-by: Daniel Baumann --- include/linux/cma.h | 59 +++++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 59 insertions(+) create mode 100644 include/linux/cma.h (limited to 'include/linux/cma.h') diff --git a/include/linux/cma.h b/include/linux/cma.h new file mode 100644 index 000000000..63873b93d --- /dev/null +++ b/include/linux/cma.h @@ -0,0 +1,59 @@ +/* SPDX-License-Identifier: GPL-2.0 */ +#ifndef __CMA_H__ +#define __CMA_H__ + +#include +#include +#include + +/* + * 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 -- cgit v1.2.3