You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
77 lines
2.3 KiB
77 lines
2.3 KiB
#ifndef _LINUX_RBIN_REGION_H
|
|
#define _LINUX_RBIN_REGION_H
|
|
|
|
#include <linux/atomic.h>
|
|
#include <linux/kernel.h>
|
|
#include <linux/types.h>
|
|
#include <linux/mm.h>
|
|
#include <linux/genalloc.h>
|
|
#include <linux/highmem.h>
|
|
|
|
#define E_NOREGION 55 // returned when region is disabled
|
|
|
|
struct rr_handle {
|
|
int pool_id; /* Pool index : corresponds to filesystem */
|
|
int rb_index; /* Redblack tree index: value equals inode number */
|
|
int ra_index; /* Radix tree index : value equals page->index */
|
|
int usage; /* indicates current usage of corresponding page */
|
|
struct list_head lru; /* use lru of struct page instead */
|
|
};
|
|
|
|
enum usage {
|
|
RC_FREED,
|
|
RC_INUSE,
|
|
ION_FREED,
|
|
ION_INUSE,
|
|
};
|
|
|
|
struct region_ops {
|
|
void (*evict)(unsigned long handle);
|
|
};
|
|
|
|
struct rbin_region {
|
|
struct zone *zone;
|
|
unsigned long start_pfn;
|
|
unsigned long end_pfn;
|
|
struct rr_handle *handles;
|
|
struct list_head freelist; /* protected by lru_lock. handle->lru */
|
|
struct list_head usedlist; /* protected by lru_lock. handle->lru */
|
|
const struct region_ops *ops;
|
|
|
|
spinlock_t lru_lock;
|
|
spinlock_t region_lock;
|
|
struct gen_pool *pool;
|
|
int ion_inflight;
|
|
int rc_inflight;
|
|
bool rc_disabled;
|
|
unsigned long timeout; /* timeout for rbincache enable */
|
|
};
|
|
|
|
/* rbin region api's */
|
|
#define ZERO_HANDLE ((void *)~(~0UL >> 1))
|
|
struct rr_handle *region_store_cache(struct page *page, int pool_id,
|
|
int rb_index, int ra_index);
|
|
int region_load_cache(struct rr_handle *handle, struct page *page,
|
|
int pool_id, int rb_index, int ra_index);
|
|
int region_flush_cache(struct rr_handle *handle);
|
|
bool try_get_rbincache(void);
|
|
void put_rbincache(void);
|
|
void init_region(unsigned long pfn, unsigned long nr_pages,
|
|
const struct region_ops *ops);
|
|
/* rbin region api's end */
|
|
|
|
/* helper function declaration */
|
|
struct rr_handle *pfn_to_handle(unsigned long pfn);
|
|
struct rr_handle *page_to_handle(struct page *page);
|
|
struct page *handle_to_page(struct rr_handle *handle);
|
|
bool handle_is_valid(struct rr_handle *handle);
|
|
/* helper function declaration end */
|
|
|
|
/* ion_rbin_heap apis */
|
|
#define ION_RBIN_ALLOCATE_FAIL -1
|
|
phys_addr_t ion_rbin_allocate(unsigned long size);
|
|
void ion_rbin_free(phys_addr_t addr, unsigned long size);
|
|
int init_rbinregion(unsigned long base, unsigned long size);
|
|
/* ion_rbin_heap apis end */
|
|
|
|
#endif /* _LINUX_RBIN_REGION_H*/
|
|
|