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| author | David VomLehn <vomlehn@texas.net> | 2017-01-24 09:09:09 +0300 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2017-01-24 23:03:38 +0300 |
| commit | 3a35780f31679724732738a7eb94f78bb97e0f0c (patch) | |
| tree | 4c147c6e00c2cd83a37f69f8ca7980e1be92f702 /drivers/net/ethernet/aquantia/atlantic/aq_utils.h | |
| parent | 5015024ddfe5efccf1b964f14f078c2152b3b335 (diff) | |
| download | linux-3a35780f31679724732738a7eb94f78bb97e0f0c.tar.xz | |
net: ethernet: aquantia: Common functions and definitions
Add files containing the functions and definitions used in common in
different functional areas.
Signed-off-by: Alexander Loktionov <Alexander.Loktionov@aquantia.com>
Signed-off-by: Dmitrii Tarakanov <Dmitrii.Tarakanov@aquantia.com>
Signed-off-by: Pavel Belous <Pavel.Belous@aquantia.com>
Signed-off-by: Dmitry Bezrukov <Dmitry.Bezrukov@aquantia.com>
Signed-off-by: David M. VomLehn <vomlehn@texas.net>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'drivers/net/ethernet/aquantia/atlantic/aq_utils.h')
| -rw-r--r-- | drivers/net/ethernet/aquantia/atlantic/aq_utils.h | 50 |
1 files changed, 50 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..4446bd90fd86 --- /dev/null +++ b/drivers/net/ethernet/aquantia/atlantic/aq_utils.h @@ -0,0 +1,50 @@ +/* + * 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; + atomic_t busy_count; +}; + +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 */ |