diff options
Diffstat (limited to 'drivers/net/ethernet/aquantia/atlantic/aq_utils.h')
| -rw-r--r-- | drivers/net/ethernet/aquantia/atlantic/aq_utils.h | 49 |
1 files changed, 49 insertions, 0 deletions
diff --git a/drivers/net/ethernet/aquantia/atlantic/aq_utils.h b/drivers/net/ethernet/aquantia/atlantic/aq_utils.h new file mode 100644 index 000000000000..f6012b34abe6 --- /dev/null +++ b/drivers/net/ethernet/aquantia/atlantic/aq_utils.h @@ -0,0 +1,49 @@ +/* + * aQuantia Corporation Network Driver + * Copyright (C) 2014-2017 aQuantia Corporation. All rights reserved + * + * This program is free software; you can redistribute it and/or modify it + * under the terms and conditions of the GNU General Public License, + * version 2, as published by the Free Software Foundation. + */ + +/* File aq_utils.h: Useful macro and structures used in all layers of driver. */ + +#ifndef AQ_UTILS_H +#define AQ_UTILS_H + +#include "aq_common.h" + +#define AQ_DIMOF(_ARY_) ARRAY_SIZE(_ARY_) + +struct aq_obj_s { + spinlock_t lock; /* spinlock for nic/rings processing */ + atomic_t flags; +}; + +static inline void aq_utils_obj_set(atomic_t *flags, u32 mask) +{ + unsigned long flags_old, flags_new; + + do { + flags_old = atomic_read(flags); + flags_new = flags_old | (mask); + } while (atomic_cmpxchg(flags, flags_old, flags_new) != flags_old); +} + +static inline void aq_utils_obj_clear(atomic_t *flags, u32 mask) +{ + unsigned long flags_old, flags_new; + + do { + flags_old = atomic_read(flags); + flags_new = flags_old & ~(mask); + } while (atomic_cmpxchg(flags, flags_old, flags_new) != flags_old); +} + +static inline bool aq_utils_obj_test(atomic_t *flags, u32 mask) +{ + return atomic_read(flags) & mask; +} + +#endif /* AQ_UTILS_H */ |