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1/* SPDX-License-Identifier: GPL-2.0 */
2/*
3 * Copyright (c) 2023 Meta Platforms, Inc. and affiliates
4 * Copyright (c) 2023 Intel and affiliates
5 */
6
7#ifndef __DPLL_CORE_H__
8#define __DPLL_CORE_H__
9
10#include <linux/dpll.h>
11#include <linux/list.h>
12#include <linux/refcount.h>
13#include "dpll_nl.h"
14
15#define DPLL_REGISTERED XA_MARK_1
16
17/**
18 * struct dpll_device - stores DPLL device internal data
19 * @id: unique id number for device given by dpll subsystem
20 * @device_idx: id given by dev driver
21 * @clock_id: unique identifier (clock_id) of a dpll
22 * @module: module of creator
23 * @type: type of a dpll
24 * @pin_refs: stores pins registered within a dpll
25 * @refcount: refcount
26 * @registration_list: list of registered ops and priv data of dpll owners
27 **/
28struct dpll_device {
29 u32 id;
30 u32 device_idx;
31 u64 clock_id;
32 struct module *module;
33 enum dpll_type type;
34 struct xarray pin_refs;
35 refcount_t refcount;
36 struct list_head registration_list;
37};
38
39/**
40 * struct dpll_pin - structure for a dpll pin
41 * @id: unique id number for pin given by dpll subsystem
42 * @pin_idx: index of a pin given by dev driver
43 * @clock_id: clock_id of creator
44 * @module: module of creator
45 * @dpll_refs: hold referencees to dplls pin was registered with
46 * @parent_refs: hold references to parent pins pin was registered with
47 * @ref_sync_pins: hold references to pins for Reference SYNC feature
48 * @prop: pin properties copied from the registerer
49 * @refcount: refcount
50 * @rcu: rcu_head for kfree_rcu()
51 **/
52struct dpll_pin {
53 u32 id;
54 u32 pin_idx;
55 u64 clock_id;
56 struct module *module;
57 struct xarray dpll_refs;
58 struct xarray parent_refs;
59 struct xarray ref_sync_pins;
60 struct dpll_pin_properties prop;
61 refcount_t refcount;
62 struct rcu_head rcu;
63};
64
65/**
66 * struct dpll_pin_ref - structure for referencing either dpll or pins
67 * @dpll: pointer to a dpll
68 * @pin: pointer to a pin
69 * @registration_list: list of ops and priv data registered with the ref
70 * @refcount: refcount
71 **/
72struct dpll_pin_ref {
73 union {
74 struct dpll_device *dpll;
75 struct dpll_pin *pin;
76 };
77 struct list_head registration_list;
78 refcount_t refcount;
79};
80
81void *dpll_priv(struct dpll_device *dpll);
82void *dpll_pin_on_dpll_priv(struct dpll_device *dpll, struct dpll_pin *pin);
83void *dpll_pin_on_pin_priv(struct dpll_pin *parent, struct dpll_pin *pin);
84
85const struct dpll_device_ops *dpll_device_ops(struct dpll_device *dpll);
86struct dpll_device *dpll_device_get_by_id(int id);
87const struct dpll_pin_ops *dpll_pin_ops(struct dpll_pin_ref *ref);
88struct dpll_pin_ref *dpll_xa_ref_dpll_first(struct xarray *xa_refs);
89extern struct xarray dpll_device_xa;
90extern struct xarray dpll_pin_xa;
91extern struct mutex dpll_lock;
92#endif