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1/* SPDX-License-Identifier: GPL-2.0-only */
2/*
3 * Copyright (c) 2016, NVIDIA CORPORATION. All rights reserved.
4 */
5
6#ifndef __SOC_TEGRA_BPMP_H
7#define __SOC_TEGRA_BPMP_H
8
9#include <linux/iosys-map.h>
10#include <linux/mailbox_client.h>
11#include <linux/pm_domain.h>
12#include <linux/reset-controller.h>
13#include <linux/semaphore.h>
14#include <linux/types.h>
15
16#include <soc/tegra/bpmp-abi.h>
17
18struct tegra_bpmp_clk;
19struct tegra_bpmp_ops;
20
21struct tegra_bpmp_soc {
22 struct {
23 struct {
24 unsigned int offset;
25 unsigned int count;
26 unsigned int timeout;
27 } cpu_tx, thread, cpu_rx;
28 } channels;
29
30 const struct tegra_bpmp_ops *ops;
31 unsigned int num_resets;
32};
33
34struct tegra_bpmp_mb_data {
35 u32 code;
36 u32 flags;
37 u8 data[MSG_DATA_MIN_SZ];
38} __packed;
39
40#define tegra_bpmp_mb_read(dst, mb, size) \
41 iosys_map_memcpy_from(dst, mb, offsetof(struct tegra_bpmp_mb_data, data), size)
42
43#define tegra_bpmp_mb_write(mb, src, size) \
44 iosys_map_memcpy_to(mb, offsetof(struct tegra_bpmp_mb_data, data), src, size)
45
46#define tegra_bpmp_mb_read_field(mb, field) \
47 iosys_map_rd_field(mb, 0, struct tegra_bpmp_mb_data, field)
48
49#define tegra_bpmp_mb_write_field(mb, field, value) \
50 iosys_map_wr_field(mb, 0, struct tegra_bpmp_mb_data, field, value)
51
52struct tegra_bpmp_channel {
53 struct tegra_bpmp *bpmp;
54 struct iosys_map ib;
55 struct iosys_map ob;
56 struct completion completion;
57 struct tegra_ivc *ivc;
58 unsigned int index;
59};
60
61typedef void (*tegra_bpmp_mrq_handler_t)(unsigned int mrq,
62 struct tegra_bpmp_channel *channel,
63 void *data);
64
65struct tegra_bpmp_mrq {
66 struct list_head list;
67 unsigned int mrq;
68 tegra_bpmp_mrq_handler_t handler;
69 void *data;
70};
71
72struct tegra_bpmp {
73 const struct tegra_bpmp_soc *soc;
74 struct device *dev;
75 void *priv;
76
77 struct {
78 struct mbox_client client;
79 struct mbox_chan *channel;
80 } mbox;
81
82 spinlock_t atomic_tx_lock;
83 struct tegra_bpmp_channel *tx_channel, *rx_channel, *threaded_channels;
84
85 struct {
86 unsigned long *allocated;
87 unsigned long *busy;
88 unsigned int count;
89 struct semaphore lock;
90 } threaded;
91
92 struct list_head mrqs;
93 spinlock_t lock;
94
95 struct tegra_bpmp_clk **clocks;
96 unsigned int num_clocks;
97
98 struct reset_controller_dev rstc;
99
100 struct genpd_onecell_data genpd;
101
102#ifdef CONFIG_DEBUG_FS
103 struct dentry *debugfs_mirror;
104#endif
105
106 bool suspended;
107};
108
109#define TEGRA_BPMP_MESSAGE_RESET BIT(0)
110
111struct tegra_bpmp_message {
112 unsigned int mrq;
113
114 struct {
115 const void *data;
116 size_t size;
117 } tx;
118
119 struct {
120 void *data;
121 size_t size;
122 int ret;
123 } rx;
124
125 unsigned long flags;
126};
127
128#if IS_ENABLED(CONFIG_TEGRA_BPMP)
129struct tegra_bpmp *tegra_bpmp_get(struct device *dev);
130struct tegra_bpmp *tegra_bpmp_get_with_id(struct device *dev, unsigned int *id);
131void tegra_bpmp_put(struct tegra_bpmp *bpmp);
132int tegra_bpmp_transfer_atomic(struct tegra_bpmp *bpmp,
133 struct tegra_bpmp_message *msg);
134int tegra_bpmp_transfer(struct tegra_bpmp *bpmp,
135 struct tegra_bpmp_message *msg);
136void tegra_bpmp_mrq_return(struct tegra_bpmp_channel *channel, int code,
137 const void *data, size_t size);
138
139int tegra_bpmp_request_mrq(struct tegra_bpmp *bpmp, unsigned int mrq,
140 tegra_bpmp_mrq_handler_t handler, void *data);
141void tegra_bpmp_free_mrq(struct tegra_bpmp *bpmp, unsigned int mrq,
142 void *data);
143bool tegra_bpmp_mrq_is_supported(struct tegra_bpmp *bpmp, unsigned int mrq);
144#else
145static inline struct tegra_bpmp *tegra_bpmp_get(struct device *dev)
146{
147 return ERR_PTR(-ENODEV);
148}
149
150static inline struct tegra_bpmp *tegra_bpmp_get_with_id(struct device *dev,
151 unsigned int *id)
152{
153 return ERR_PTR(-ENODEV);
154}
155
156static inline void tegra_bpmp_put(struct tegra_bpmp *bpmp)
157{
158}
159
160static inline int tegra_bpmp_transfer_atomic(struct tegra_bpmp *bpmp,
161 struct tegra_bpmp_message *msg)
162{
163 return -ENODEV;
164}
165
166static inline int tegra_bpmp_transfer(struct tegra_bpmp *bpmp,
167 struct tegra_bpmp_message *msg)
168{
169 return -ENODEV;
170}
171
172static inline void tegra_bpmp_mrq_return(struct tegra_bpmp_channel *channel,
173 int code, const void *data,
174 size_t size)
175{
176}
177
178static inline int tegra_bpmp_request_mrq(struct tegra_bpmp *bpmp,
179 unsigned int mrq,
180 tegra_bpmp_mrq_handler_t handler,
181 void *data)
182{
183 return -ENODEV;
184}
185
186static inline void tegra_bpmp_free_mrq(struct tegra_bpmp *bpmp,
187 unsigned int mrq, void *data)
188{
189}
190
191static inline bool tegra_bpmp_mrq_is_supported(struct tegra_bpmp *bpmp,
192 unsigned int mrq)
193{
194 return false;
195}
196#endif
197
198void tegra_bpmp_handle_rx(struct tegra_bpmp *bpmp);
199
200#if IS_ENABLED(CONFIG_CLK_TEGRA_BPMP)
201int tegra_bpmp_init_clocks(struct tegra_bpmp *bpmp);
202#else
203static inline int tegra_bpmp_init_clocks(struct tegra_bpmp *bpmp)
204{
205 return 0;
206}
207#endif
208
209#if IS_ENABLED(CONFIG_RESET_TEGRA_BPMP)
210int tegra_bpmp_init_resets(struct tegra_bpmp *bpmp);
211#else
212static inline int tegra_bpmp_init_resets(struct tegra_bpmp *bpmp)
213{
214 return 0;
215}
216#endif
217
218#if IS_ENABLED(CONFIG_SOC_TEGRA_POWERGATE_BPMP)
219int tegra_bpmp_init_powergates(struct tegra_bpmp *bpmp);
220#else
221static inline int tegra_bpmp_init_powergates(struct tegra_bpmp *bpmp)
222{
223 return 0;
224}
225#endif
226
227#if IS_ENABLED(CONFIG_DEBUG_FS)
228int tegra_bpmp_init_debugfs(struct tegra_bpmp *bpmp);
229#else
230static inline int tegra_bpmp_init_debugfs(struct tegra_bpmp *bpmp)
231{
232 return 0;
233}
234#endif
235
236
237#endif /* __SOC_TEGRA_BPMP_H */