]>
git.proxmox.com Git - mirror_ubuntu-jammy-kernel.git/blob - drivers/hwspinlock/hwspinlock_internal.h
1 /* SPDX-License-Identifier: GPL-2.0 */
3 * Hardware spinlocks internal header
5 * Copyright (C) 2010 Texas Instruments Incorporated - http://www.ti.com
7 * Contact: Ohad Ben-Cohen <ohad@wizery.com>
10 #ifndef __HWSPINLOCK_HWSPINLOCK_H
11 #define __HWSPINLOCK_HWSPINLOCK_H
13 #include <linux/spinlock.h>
14 #include <linux/device.h>
16 struct hwspinlock_device
;
19 * struct hwspinlock_ops - platform-specific hwspinlock handlers
21 * @trylock: make a single attempt to take the lock. returns 0 on
22 * failure and true on success. may _not_ sleep.
23 * @unlock: release the lock. always succeed. may _not_ sleep.
24 * @relax: optional, platform-specific relax handler, called by hwspinlock
25 * core while spinning on a lock, between two successive
26 * invocations of @trylock. may _not_ sleep.
28 struct hwspinlock_ops
{
29 int (*trylock
)(struct hwspinlock
*lock
);
30 void (*unlock
)(struct hwspinlock
*lock
);
31 void (*relax
)(struct hwspinlock
*lock
);
35 * struct hwspinlock - this struct represents a single hwspinlock instance
36 * @bank: the hwspinlock_device structure which owns this lock
37 * @lock: initialized and used by hwspinlock core
38 * @priv: private data, owned by the underlying platform-specific hwspinlock drv
41 struct hwspinlock_device
*bank
;
47 * struct hwspinlock_device - a device which usually spans numerous hwspinlocks
48 * @dev: underlying device, will be used to invoke runtime PM api
49 * @ops: platform-specific hwspinlock handlers
50 * @base_id: id index of the first lock in this device
51 * @num_locks: number of locks in this device
52 * @lock: dynamically allocated array of 'struct hwspinlock'
54 struct hwspinlock_device
{
56 const struct hwspinlock_ops
*ops
;
59 struct hwspinlock lock
[];
62 static inline int hwlock_to_id(struct hwspinlock
*hwlock
)
64 int local_id
= hwlock
- &hwlock
->bank
->lock
[0];
66 return hwlock
->bank
->base_id
+ local_id
;
69 #endif /* __HWSPINLOCK_HWSPINLOCK_H */