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author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-07 18:49:45 +0000 |
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committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-07 18:49:45 +0000 |
commit | 2c3c1048746a4622d8c89a29670120dc8fab93c4 (patch) | |
tree | 848558de17fb3008cdf4d861b01ac7781903ce39 /drivers/hwspinlock/hwspinlock_internal.h | |
parent | Initial commit. (diff) | |
download | linux-2c3c1048746a4622d8c89a29670120dc8fab93c4.tar.xz linux-2c3c1048746a4622d8c89a29670120dc8fab93c4.zip |
Adding upstream version 6.1.76.upstream/6.1.76
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'drivers/hwspinlock/hwspinlock_internal.h')
-rw-r--r-- | drivers/hwspinlock/hwspinlock_internal.h | 69 |
1 files changed, 69 insertions, 0 deletions
diff --git a/drivers/hwspinlock/hwspinlock_internal.h b/drivers/hwspinlock/hwspinlock_internal.h new file mode 100644 index 000000000..29892767b --- /dev/null +++ b/drivers/hwspinlock/hwspinlock_internal.h @@ -0,0 +1,69 @@ +/* SPDX-License-Identifier: GPL-2.0 */ +/* + * Hardware spinlocks internal header + * + * Copyright (C) 2010 Texas Instruments Incorporated - http://www.ti.com + * + * Contact: Ohad Ben-Cohen <ohad@wizery.com> + */ + +#ifndef __HWSPINLOCK_HWSPINLOCK_H +#define __HWSPINLOCK_HWSPINLOCK_H + +#include <linux/spinlock.h> +#include <linux/device.h> + +struct hwspinlock_device; + +/** + * struct hwspinlock_ops - platform-specific hwspinlock handlers + * + * @trylock: make a single attempt to take the lock. returns 0 on + * failure and true on success. may _not_ sleep. + * @unlock: release the lock. always succeed. may _not_ sleep. + * @relax: optional, platform-specific relax handler, called by hwspinlock + * core while spinning on a lock, between two successive + * invocations of @trylock. may _not_ sleep. + */ +struct hwspinlock_ops { + int (*trylock)(struct hwspinlock *lock); + void (*unlock)(struct hwspinlock *lock); + void (*relax)(struct hwspinlock *lock); +}; + +/** + * struct hwspinlock - this struct represents a single hwspinlock instance + * @bank: the hwspinlock_device structure which owns this lock + * @lock: initialized and used by hwspinlock core + * @priv: private data, owned by the underlying platform-specific hwspinlock drv + */ +struct hwspinlock { + struct hwspinlock_device *bank; + spinlock_t lock; + void *priv; +}; + +/** + * struct hwspinlock_device - a device which usually spans numerous hwspinlocks + * @dev: underlying device, will be used to invoke runtime PM api + * @ops: platform-specific hwspinlock handlers + * @base_id: id index of the first lock in this device + * @num_locks: number of locks in this device + * @lock: dynamically allocated array of 'struct hwspinlock' + */ +struct hwspinlock_device { + struct device *dev; + const struct hwspinlock_ops *ops; + int base_id; + int num_locks; + struct hwspinlock lock[]; +}; + +static inline int hwlock_to_id(struct hwspinlock *hwlock) +{ + int local_id = hwlock - &hwlock->bank->lock[0]; + + return hwlock->bank->base_id + local_id; +} + +#endif /* __HWSPINLOCK_HWSPINLOCK_H */ |