#include <linux/spinlock.h>
#include <linux/device.h>
+struct hwspinlock_device;
+
/**
* struct hwspinlock_ops - platform-specific hwspinlock handlers
*
/**
* struct hwspinlock - this struct represents a single hwspinlock instance
- *
- * @dev: underlying device, will be used to invoke runtime PM api
- * @ops: platform-specific hwspinlock handlers
- * @id: a global, unique, system-wide, index of the lock.
+ * @bank: the hwspinlock_device structure which owns this lock
* @lock: initialized and used by hwspinlock core
- * @owner: underlying implementation module, used to maintain module ref count
- *
- * Note: currently simplicity was opted for, but later we can squeeze some
- * memory bytes by grouping the dev, ops and owner members in a single
- * per-platform struct, and have all hwspinlocks point at it.
+ * @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 id;
- spinlock_t lock;
- struct module *owner;
+ int base_id;
+ int num_locks;
+ struct hwspinlock lock[0];
};
+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 */