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/* SPDX-License-Identifier: GPL-2.0 */
/*
* Copyright (c) 2023 Meta Platforms, Inc. and affiliates
* Copyright (c) 2023 Intel and affiliates
*/
#ifndef __DPLL_CORE_H__
#define __DPLL_CORE_H__
#include <linux/dpll.h>
#include <linux/list.h>
#include <linux/refcount.h>
#include "dpll_nl.h"
#define DPLL_REGISTERED XA_MARK_1
/**
* struct dpll_device - stores DPLL device internal data
* @id: unique id number for device given by dpll subsystem
* @device_idx: id given by dev driver
* @clock_id: unique identifier (clock_id) of a dpll
* @module: module of creator
* @type: type of a dpll
* @pin_refs: stores pins registered within a dpll
* @refcount: refcount
* @registration_list: list of registered ops and priv data of dpll owners
**/
struct dpll_device {
u32 id;
u32 device_idx;
u64 clock_id;
struct module *module;
enum dpll_type type;
struct xarray pin_refs;
refcount_t refcount;
struct list_head registration_list;
};
/**
* struct dpll_pin - structure for a dpll pin
* @id: unique id number for pin given by dpll subsystem
* @pin_idx: index of a pin given by dev driver
* @clock_id: clock_id of creator
* @module: module of creator
* @dpll_refs: hold referencees to dplls pin was registered with
* @parent_refs: hold references to parent pins pin was registered with
* @prop: pin properties copied from the registerer
* @rclk_dev_name: holds name of device when pin can recover clock from it
* @refcount: refcount
* @rcu: rcu_head for kfree_rcu()
**/
struct dpll_pin {
u32 id;
u32 pin_idx;
u64 clock_id;
struct module *module;
struct xarray dpll_refs;
struct xarray parent_refs;
struct dpll_pin_properties prop;
refcount_t refcount;
struct rcu_head rcu;
};
/**
* struct dpll_pin_ref - structure for referencing either dpll or pins
* @dpll: pointer to a dpll
* @pin: pointer to a pin
* @registration_list: list of ops and priv data registered with the ref
* @refcount: refcount
**/
struct dpll_pin_ref {
union {
struct dpll_device *dpll;
struct dpll_pin *pin;
};
struct list_head registration_list;
refcount_t refcount;
};
void *dpll_priv(struct dpll_device *dpll);
void *dpll_pin_on_dpll_priv(struct dpll_device *dpll, struct dpll_pin *pin);
void *dpll_pin_on_pin_priv(struct dpll_pin *parent, struct dpll_pin *pin);
const struct dpll_device_ops *dpll_device_ops(struct dpll_device *dpll);
struct dpll_device *dpll_device_get_by_id(int id);
const struct dpll_pin_ops *dpll_pin_ops(struct dpll_pin_ref *ref);
struct dpll_pin_ref *dpll_xa_ref_dpll_first(struct xarray *xa_refs);
extern struct xarray dpll_device_xa;
extern struct xarray dpll_pin_xa;
extern struct mutex dpll_lock;
#endif
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