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1 | /* |
2 | * aQuantia Corporation Network Driver | |
3 | * Copyright (C) 2014-2017 aQuantia Corporation. All rights reserved | |
4 | * | |
5 | * This program is free software; you can redistribute it and/or modify it | |
6 | * under the terms and conditions of the GNU General Public License, | |
7 | * version 2, as published by the Free Software Foundation. | |
8 | */ | |
9 | ||
10 | /* File aq_utils.h: Useful macro and structures used in all layers of driver. */ | |
11 | ||
12 | #ifndef AQ_UTILS_H | |
13 | #define AQ_UTILS_H | |
14 | ||
15 | #include "aq_common.h" | |
16 | ||
17 | #define AQ_DIMOF(_ARY_) ARRAY_SIZE(_ARY_) | |
18 | ||
19 | struct aq_obj_s { | |
20 | spinlock_t lock; /* spinlock for nic/rings processing */ | |
21 | atomic_t flags; | |
3a35780f DV |
22 | }; |
23 | ||
24 | static inline void aq_utils_obj_set(atomic_t *flags, u32 mask) | |
25 | { | |
26 | unsigned long flags_old, flags_new; | |
27 | ||
28 | do { | |
29 | flags_old = atomic_read(flags); | |
30 | flags_new = flags_old | (mask); | |
31 | } while (atomic_cmpxchg(flags, flags_old, flags_new) != flags_old); | |
32 | } | |
33 | ||
34 | static inline void aq_utils_obj_clear(atomic_t *flags, u32 mask) | |
35 | { | |
36 | unsigned long flags_old, flags_new; | |
37 | ||
38 | do { | |
39 | flags_old = atomic_read(flags); | |
40 | flags_new = flags_old & ~(mask); | |
41 | } while (atomic_cmpxchg(flags, flags_old, flags_new) != flags_old); | |
42 | } | |
43 | ||
44 | static inline bool aq_utils_obj_test(atomic_t *flags, u32 mask) | |
45 | { | |
46 | return atomic_read(flags) & mask; | |
47 | } | |
48 | ||
49 | #endif /* AQ_UTILS_H */ |