]>
git.proxmox.com Git - mirror_ubuntu-jammy-kernel.git/blob - drivers/hwspinlock/hwspinlock_internal.h
2 * Hardware spinlocks internal header
4 * Copyright (C) 2010 Texas Instruments Incorporated - http://www.ti.com
6 * Contact: Ohad Ben-Cohen <ohad@wizery.com>
8 * This program is free software; you can redistribute it and/or modify it
9 * under the terms of the GNU General Public License version 2 as published
10 * by the Free Software Foundation.
12 * This program is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 * GNU General Public License for more details.
18 #ifndef __HWSPINLOCK_HWSPINLOCK_H
19 #define __HWSPINLOCK_HWSPINLOCK_H
21 #include <linux/spinlock.h>
22 #include <linux/device.h>
24 struct hwspinlock_device
;
27 * struct hwspinlock_ops - platform-specific hwspinlock handlers
29 * @trylock: make a single attempt to take the lock. returns 0 on
30 * failure and true on success. may _not_ sleep.
31 * @unlock: release the lock. always succeed. may _not_ sleep.
32 * @relax: optional, platform-specific relax handler, called by hwspinlock
33 * core while spinning on a lock, between two successive
34 * invocations of @trylock. may _not_ sleep.
36 struct hwspinlock_ops
{
37 int (*trylock
)(struct hwspinlock
*lock
);
38 void (*unlock
)(struct hwspinlock
*lock
);
39 void (*relax
)(struct hwspinlock
*lock
);
43 * struct hwspinlock - this struct represents a single hwspinlock instance
44 * @bank: the hwspinlock_device structure which owns this lock
45 * @lock: initialized and used by hwspinlock core
46 * @priv: private data, owned by the underlying platform-specific hwspinlock drv
49 struct hwspinlock_device
*bank
;
55 * struct hwspinlock_device - a device which usually spans numerous hwspinlocks
56 * @dev: underlying device, will be used to invoke runtime PM api
57 * @ops: platform-specific hwspinlock handlers
58 * @base_id: id index of the first lock in this device
59 * @num_locks: number of locks in this device
60 * @lock: dynamically allocated array of 'struct hwspinlock'
62 struct hwspinlock_device
{
64 const struct hwspinlock_ops
*ops
;
67 struct hwspinlock lock
[0];
70 static inline int hwlock_to_id(struct hwspinlock
*hwlock
)
72 int local_id
= hwlock
- &hwlock
->bank
->lock
[0];
74 return hwlock
->bank
->base_id
+ local_id
;
77 #endif /* __HWSPINLOCK_HWSPINLOCK_H */