diff options
Diffstat (limited to 'mm/cma.c')
| -rw-r--r-- | mm/cma.c | 49 |
1 files changed, 24 insertions, 25 deletions
@@ -35,29 +35,24 @@ #include <linux/highmem.h> #include <linux/io.h> -struct cma { - unsigned long base_pfn; - unsigned long count; - unsigned long *bitmap; - unsigned int order_per_bit; /* Order of pages represented by one bit */ - struct mutex lock; -}; - -static struct cma cma_areas[MAX_CMA_AREAS]; -static unsigned cma_area_count; +#include "cma.h" + +struct cma cma_areas[MAX_CMA_AREAS]; +unsigned cma_area_count; static DEFINE_MUTEX(cma_mutex); -phys_addr_t cma_get_base(struct cma *cma) +phys_addr_t cma_get_base(const struct cma *cma) { return PFN_PHYS(cma->base_pfn); } -unsigned long cma_get_size(struct cma *cma) +unsigned long cma_get_size(const struct cma *cma) { return cma->count << PAGE_SHIFT; } -static unsigned long cma_bitmap_aligned_mask(struct cma *cma, int align_order) +static unsigned long cma_bitmap_aligned_mask(const struct cma *cma, + int align_order) { if (align_order <= cma->order_per_bit) return 0; @@ -68,7 +63,8 @@ static unsigned long cma_bitmap_aligned_mask(struct cma *cma, int align_order) * Find a PFN aligned to the specified order and return an offset represented in * order_per_bits. */ -static unsigned long cma_bitmap_aligned_offset(struct cma *cma, int align_order) +static unsigned long cma_bitmap_aligned_offset(const struct cma *cma, + int align_order) { if (align_order <= cma->order_per_bit) return 0; @@ -77,18 +73,14 @@ static unsigned long cma_bitmap_aligned_offset(struct cma *cma, int align_order) - cma->base_pfn) >> cma->order_per_bit; } -static unsigned long cma_bitmap_maxno(struct cma *cma) -{ - return cma->count >> cma->order_per_bit; -} - -static unsigned long cma_bitmap_pages_to_bits(struct cma *cma, - unsigned long pages) +static unsigned long cma_bitmap_pages_to_bits(const struct cma *cma, + unsigned long pages) { return ALIGN(pages, 1UL << cma->order_per_bit) >> cma->order_per_bit; } -static void cma_clear_bitmap(struct cma *cma, unsigned long pfn, int count) +static void cma_clear_bitmap(struct cma *cma, unsigned long pfn, + unsigned int count) { unsigned long bitmap_no, bitmap_count; @@ -134,6 +126,12 @@ static int __init cma_activate_area(struct cma *cma) } while (--i); mutex_init(&cma->lock); + +#ifdef CONFIG_CMA_DEBUGFS + INIT_HLIST_HEAD(&cma->mem_head); + spin_lock_init(&cma->mem_head_lock); +#endif + return 0; err: @@ -167,7 +165,8 @@ core_initcall(cma_init_reserved_areas); * This function creates custom contiguous area from already reserved memory. */ int __init cma_init_reserved_mem(phys_addr_t base, phys_addr_t size, - int order_per_bit, struct cma **res_cma) + unsigned int order_per_bit, + struct cma **res_cma) { struct cma *cma; phys_addr_t alignment; @@ -358,7 +357,7 @@ err: * This function allocates part of contiguous memory on specific * contiguous memory area. */ -struct page *cma_alloc(struct cma *cma, int count, unsigned int align) +struct page *cma_alloc(struct cma *cma, unsigned int count, unsigned int align) { unsigned long mask, offset, pfn, start = 0; unsigned long bitmap_maxno, bitmap_no, bitmap_count; @@ -429,7 +428,7 @@ struct page *cma_alloc(struct cma *cma, int count, unsigned int align) * It returns false when provided pages do not belong to contiguous area and * true otherwise. */ -bool cma_release(struct cma *cma, struct page *pages, int count) +bool cma_release(struct cma *cma, const struct page *pages, unsigned int count) { unsigned long pfn; |
