1 /*
2 * Copyright (c) 2016, NVIDIA CORPORATION. All rights reserved.
3 *
4 * This program is free software; you can redistribute it and/or modify it
5 * under the terms and conditions of the GNU General Public License,
6 * version 2, as published by the Free Software Foundation.
7 *
8 * This program is distributed in the hope it will be useful, but WITHOUT
9 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
10 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
11 * more details.
12 */
13
14 #ifndef __SOC_TEGRA_BPMP_H
15 #define __SOC_TEGRA_BPMP_H
16
17 #include <linux/mailbox_client.h>
18 #include <linux/pm_domain.h>
19 #include <linux/reset-controller.h>
20 #include <linux/semaphore.h>
21 #include <linux/types.h>
22
23 #include <soc/tegra/bpmp-abi.h>
24
25 struct tegra_bpmp_clk;
26
27 struct tegra_bpmp_soc {
28 struct {
29 struct {
30 unsigned int offset;
31 unsigned int count;
32 unsigned int timeout;
33 } cpu_tx, thread, cpu_rx;
34 } channels;
35 unsigned int num_resets;
36 };
37
38 struct tegra_bpmp_mb_data {
39 u32 code;
40 u32 flags;
41 u8 data[MSG_DATA_MIN_SZ];
42 } __packed;
43
44 struct tegra_bpmp_channel {
45 struct tegra_bpmp *bpmp;
46 struct tegra_bpmp_mb_data *ib;
47 struct tegra_bpmp_mb_data *ob;
48 struct completion completion;
49 struct tegra_ivc *ivc;
50 };
51
52 typedef void (*tegra_bpmp_mrq_handler_t)(unsigned int mrq,
53 struct tegra_bpmp_channel *channel,
54 void *data);
55
56 struct tegra_bpmp_mrq {
57 struct list_head list;
58 unsigned int mrq;
59 tegra_bpmp_mrq_handler_t handler;
60 void *data;
61 };
62
63 struct tegra_bpmp {
64 const struct tegra_bpmp_soc *soc;
65 struct device *dev;
66
67 struct {
68 struct gen_pool *pool;
69 dma_addr_t phys;
70 void *virt;
71 } tx, rx;
72
73 struct {
74 struct mbox_client client;
75 struct mbox_chan *channel;
76 } mbox;
77
78 spinlock_t atomic_tx_lock;
79 struct tegra_bpmp_channel *tx_channel, *rx_channel, *threaded_channels;
80
81 struct {
82 unsigned long *allocated;
83 unsigned long *busy;
84 unsigned int count;
85 struct semaphore lock;
86 } threaded;
87
88 struct list_head mrqs;
89 spinlock_t lock;
90
91 struct tegra_bpmp_clk **clocks;
92 unsigned int num_clocks;
93
94 struct reset_controller_dev rstc;
95
96 struct genpd_onecell_data genpd;
97
98 #ifdef CONFIG_DEBUG_FS
99 struct dentry *debugfs_mirror;
100 #endif
101 };
102
103 struct tegra_bpmp_message {
104 unsigned int mrq;
105
106 struct {
107 const void *data;
108 size_t size;
109 } tx;
110
111 struct {
112 void *data;
113 size_t size;
114 int ret;
115 } rx;
116 };
117
118 #if IS_ENABLED(CONFIG_TEGRA_BPMP)
119 struct tegra_bpmp *tegra_bpmp_get(struct device *dev);
120 void tegra_bpmp_put(struct tegra_bpmp *bpmp);
121 int tegra_bpmp_transfer_atomic(struct tegra_bpmp *bpmp,
122 struct tegra_bpmp_message *msg);
123 int tegra_bpmp_transfer(struct tegra_bpmp *bpmp,
124 struct tegra_bpmp_message *msg);
125 void tegra_bpmp_mrq_return(struct tegra_bpmp_channel *channel, int code,
126 const void *data, size_t size);
127
128 int tegra_bpmp_request_mrq(struct tegra_bpmp *bpmp, unsigned int mrq,
129 tegra_bpmp_mrq_handler_t handler, void *data);
130 void tegra_bpmp_free_mrq(struct tegra_bpmp *bpmp, unsigned int mrq,
131 void *data);
132 #else
tegra_bpmp_get(struct device * dev)133 static inline struct tegra_bpmp *tegra_bpmp_get(struct device *dev)
134 {
135 return ERR_PTR(-ENOTSUPP);
136 }
tegra_bpmp_put(struct tegra_bpmp * bpmp)137 static inline void tegra_bpmp_put(struct tegra_bpmp *bpmp)
138 {
139 }
tegra_bpmp_transfer_atomic(struct tegra_bpmp * bpmp,struct tegra_bpmp_message * msg)140 static inline int tegra_bpmp_transfer_atomic(struct tegra_bpmp *bpmp,
141 struct tegra_bpmp_message *msg)
142 {
143 return -ENOTSUPP;
144 }
tegra_bpmp_transfer(struct tegra_bpmp * bpmp,struct tegra_bpmp_message * msg)145 static inline int tegra_bpmp_transfer(struct tegra_bpmp *bpmp,
146 struct tegra_bpmp_message *msg)
147 {
148 return -ENOTSUPP;
149 }
tegra_bpmp_mrq_return(struct tegra_bpmp_channel * channel,int code,const void * data,size_t size)150 static inline void tegra_bpmp_mrq_return(struct tegra_bpmp_channel *channel,
151 int code, const void *data,
152 size_t size)
153 {
154 }
155
tegra_bpmp_request_mrq(struct tegra_bpmp * bpmp,unsigned int mrq,tegra_bpmp_mrq_handler_t handler,void * data)156 static inline int tegra_bpmp_request_mrq(struct tegra_bpmp *bpmp,
157 unsigned int mrq,
158 tegra_bpmp_mrq_handler_t handler,
159 void *data)
160 {
161 return -ENOTSUPP;
162 }
tegra_bpmp_free_mrq(struct tegra_bpmp * bpmp,unsigned int mrq,void * data)163 static inline void tegra_bpmp_free_mrq(struct tegra_bpmp *bpmp,
164 unsigned int mrq, void *data)
165 {
166 }
167 #endif
168
169 #if IS_ENABLED(CONFIG_CLK_TEGRA_BPMP)
170 int tegra_bpmp_init_clocks(struct tegra_bpmp *bpmp);
171 #else
tegra_bpmp_init_clocks(struct tegra_bpmp * bpmp)172 static inline int tegra_bpmp_init_clocks(struct tegra_bpmp *bpmp)
173 {
174 return 0;
175 }
176 #endif
177
178 #if IS_ENABLED(CONFIG_RESET_TEGRA_BPMP)
179 int tegra_bpmp_init_resets(struct tegra_bpmp *bpmp);
180 #else
tegra_bpmp_init_resets(struct tegra_bpmp * bpmp)181 static inline int tegra_bpmp_init_resets(struct tegra_bpmp *bpmp)
182 {
183 return 0;
184 }
185 #endif
186
187 #if IS_ENABLED(CONFIG_SOC_TEGRA_POWERGATE_BPMP)
188 int tegra_bpmp_init_powergates(struct tegra_bpmp *bpmp);
189 #else
tegra_bpmp_init_powergates(struct tegra_bpmp * bpmp)190 static inline int tegra_bpmp_init_powergates(struct tegra_bpmp *bpmp)
191 {
192 return 0;
193 }
194 #endif
195
196 #if IS_ENABLED(CONFIG_DEBUG_FS)
197 int tegra_bpmp_init_debugfs(struct tegra_bpmp *bpmp);
198 #else
tegra_bpmp_init_debugfs(struct tegra_bpmp * bpmp)199 static inline int tegra_bpmp_init_debugfs(struct tegra_bpmp *bpmp)
200 {
201 return 0;
202 }
203 #endif
204
205
206 #endif /* __SOC_TEGRA_BPMP_H */
207