cma.h 1.8 KB

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  1. /* SPDX-License-Identifier: GPL-2.0 */
  2. #ifndef __CMA_H__
  3. #define __CMA_H__
  4. #include <linux/init.h>
  5. #include <linux/types.h>
  6. #include <linux/numa.h>
  7. /*
  8. * There is always at least global CMA area and a few optional
  9. * areas configured in kernel .config.
  10. */
  11. #ifdef CONFIG_CMA_AREAS
  12. #define MAX_CMA_AREAS (1 + CONFIG_CMA_AREAS)
  13. #else
  14. #define MAX_CMA_AREAS (0)
  15. #endif
  16. #define CMA_MAX_NAME 64
  17. struct cma;
  18. struct cma_alloc_info {
  19. unsigned long nr_migrated;
  20. unsigned long nr_reclaimed;
  21. unsigned long nr_mapped;
  22. unsigned int nr_isolate_fail;
  23. unsigned int nr_migrate_fail;
  24. unsigned int nr_test_fail;
  25. };
  26. extern unsigned long totalcma_pages;
  27. extern phys_addr_t cma_get_base(const struct cma *cma);
  28. extern unsigned long cma_get_size(const struct cma *cma);
  29. extern const char *cma_get_name(const struct cma *cma);
  30. extern int __init cma_declare_contiguous_nid(phys_addr_t base,
  31. phys_addr_t size, phys_addr_t limit,
  32. phys_addr_t alignment, unsigned int order_per_bit,
  33. bool fixed, const char *name, struct cma **res_cma,
  34. int nid);
  35. static inline int __init cma_declare_contiguous(phys_addr_t base,
  36. phys_addr_t size, phys_addr_t limit,
  37. phys_addr_t alignment, unsigned int order_per_bit,
  38. bool fixed, const char *name, struct cma **res_cma)
  39. {
  40. return cma_declare_contiguous_nid(base, size, limit, alignment,
  41. order_per_bit, fixed, name, res_cma, NUMA_NO_NODE);
  42. }
  43. extern int cma_init_reserved_mem(phys_addr_t base, phys_addr_t size,
  44. unsigned int order_per_bit,
  45. const char *name,
  46. struct cma **res_cma);
  47. extern struct page *cma_alloc(struct cma *cma, size_t count, unsigned int align,
  48. gfp_t gfp_mask);
  49. extern bool cma_release(struct cma *cma, const struct page *pages, unsigned int count);
  50. extern int cma_for_each_area(int (*it)(struct cma *cma, void *data), void *data);
  51. #endif