| 1 | /* SPDX-License-Identifier: MIT */ |
|---|
| 2 | /* |
|---|
| 3 | * Copyright © 2023-2024 Intel Corporation |
|---|
| 4 | */ |
|---|
| 5 | |
|---|
| 6 | #ifndef _CGROUP_DMEM_H |
|---|
| 7 | #define _CGROUP_DMEM_H |
|---|
| 8 | |
|---|
| 9 | #include <linux/types.h> |
|---|
| 10 | #include <linux/llist.h> |
|---|
| 11 | |
|---|
| 12 | struct dmem_cgroup_pool_state; |
|---|
| 13 | |
|---|
| 14 | /* Opaque definition of a cgroup region, used internally */ |
|---|
| 15 | struct dmem_cgroup_region; |
|---|
| 16 | |
|---|
| 17 | #if IS_ENABLED(CONFIG_CGROUP_DMEM) |
|---|
| 18 | struct dmem_cgroup_region *dmem_cgroup_register_region(u64 size, const char *name_fmt, ...) __printf(2,3); |
|---|
| 19 | void dmem_cgroup_unregister_region(struct dmem_cgroup_region *region); |
|---|
| 20 | int dmem_cgroup_try_charge(struct dmem_cgroup_region *region, u64 size, |
|---|
| 21 | struct dmem_cgroup_pool_state **ret_pool, |
|---|
| 22 | struct dmem_cgroup_pool_state **ret_limit_pool); |
|---|
| 23 | void dmem_cgroup_uncharge(struct dmem_cgroup_pool_state *pool, u64 size); |
|---|
| 24 | bool dmem_cgroup_state_evict_valuable(struct dmem_cgroup_pool_state *limit_pool, |
|---|
| 25 | struct dmem_cgroup_pool_state *test_pool, |
|---|
| 26 | bool ignore_low, bool *ret_hit_low); |
|---|
| 27 | |
|---|
| 28 | void dmem_cgroup_pool_state_put(struct dmem_cgroup_pool_state *pool); |
|---|
| 29 | #else |
|---|
| 30 | static inline __printf(2,3) struct dmem_cgroup_region * |
|---|
| 31 | dmem_cgroup_register_region(u64 size, const char *name_fmt, ...) |
|---|
| 32 | { |
|---|
| 33 | return NULL; |
|---|
| 34 | } |
|---|
| 35 | |
|---|
| 36 | static inline void dmem_cgroup_unregister_region(struct dmem_cgroup_region *region) |
|---|
| 37 | { } |
|---|
| 38 | |
|---|
| 39 | static inline int dmem_cgroup_try_charge(struct dmem_cgroup_region *region, u64 size, |
|---|
| 40 | struct dmem_cgroup_pool_state **ret_pool, |
|---|
| 41 | struct dmem_cgroup_pool_state **ret_limit_pool) |
|---|
| 42 | { |
|---|
| 43 | *ret_pool = NULL; |
|---|
| 44 | |
|---|
| 45 | if (ret_limit_pool) |
|---|
| 46 | *ret_limit_pool = NULL; |
|---|
| 47 | |
|---|
| 48 | return 0; |
|---|
| 49 | } |
|---|
| 50 | |
|---|
| 51 | static inline void dmem_cgroup_uncharge(struct dmem_cgroup_pool_state *pool, u64 size) |
|---|
| 52 | { } |
|---|
| 53 | |
|---|
| 54 | static inline |
|---|
| 55 | bool dmem_cgroup_state_evict_valuable(struct dmem_cgroup_pool_state *limit_pool, |
|---|
| 56 | struct dmem_cgroup_pool_state *test_pool, |
|---|
| 57 | bool ignore_low, bool *ret_hit_low) |
|---|
| 58 | { |
|---|
| 59 | return true; |
|---|
| 60 | } |
|---|
| 61 | |
|---|
| 62 | static inline void dmem_cgroup_pool_state_put(struct dmem_cgroup_pool_state *pool) |
|---|
| 63 | { } |
|---|
| 64 | |
|---|
| 65 | #endif |
|---|
| 66 | #endif /* _CGROUP_DMEM_H */ |
|---|
| 67 | |
|---|
