drivers/hwspinlock/hwspinlock_internal.h

Source file repositories/reference/linux-study-clean/drivers/hwspinlock/hwspinlock_internal.h

File Facts

System
Linux kernel
Corpus path
drivers/hwspinlock/hwspinlock_internal.h
Extension
.h
Size
2198 bytes
Lines
73
Domain
Driver Families
Bucket
drivers/hwspinlock
Inferred role
Driver Families: implementation source
Status
source implementation candidate

Why This File Exists

Repeatable hardware-adapter layer. Deep compatibility for every driver is out of scope; this atlas records patterns, probe lifecycles, bus glue, IRQ/DMA usage, and links back to core abstractions.

Dependency Surface

Detected Declarations

Annotated Snippet

struct hwspinlock_ops {
	int (*trylock)(struct hwspinlock *lock);
	void (*unlock)(struct hwspinlock *lock);
	int (*bust)(struct hwspinlock *lock, unsigned int id);
	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 */

Annotation

Implementation Notes