include/soc/tegra/bpmp.h

   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         struct tegra_bpmp_channel *channels;
  79         unsigned int num_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
  99 struct tegra_bpmp *tegra_bpmp_get(struct device *dev);
 100 void tegra_bpmp_put(struct tegra_bpmp *bpmp);
 101
 102 struct tegra_bpmp_message {
 103         unsigned int mrq;
 104
 105         struct {
 106                 const void *data;
 107                 size_t size;
 108         } tx;
 109
 110         struct {
 111                 void *data;
 112                 size_t size;
 113         } rx;
 114 };
 115
 116 int tegra_bpmp_transfer_atomic(struct tegra_bpmp *bpmp,
 117                                struct tegra_bpmp_message *msg);
 118 int tegra_bpmp_transfer(struct tegra_bpmp *bpmp,
 119                         struct tegra_bpmp_message *msg);
 120
 121 int tegra_bpmp_request_mrq(struct tegra_bpmp *bpmp, unsigned int mrq,
 122                            tegra_bpmp_mrq_handler_t handler, void *data);
 123 void tegra_bpmp_free_mrq(struct tegra_bpmp *bpmp, unsigned int mrq,
 124                          void *data);
 125
 126 #if IS_ENABLED(CONFIG_CLK_TEGRA_BPMP)
 127 int tegra_bpmp_init_clocks(struct tegra_bpmp *bpmp);
 128 #else
 129 static inline int tegra_bpmp_init_clocks(struct tegra_bpmp *bpmp)
 130 {
 131         return 0;
 132 }
 133 #endif
 134
 135 #if IS_ENABLED(CONFIG_RESET_TEGRA_BPMP)
 136 int tegra_bpmp_init_resets(struct tegra_bpmp *bpmp);
 137 #else
 138 static inline int tegra_bpmp_init_resets(struct tegra_bpmp *bpmp)
 139 {
 140         return 0;
 141 }
 142 #endif
 143
 144 #if IS_ENABLED(CONFIG_SOC_TEGRA_POWERGATE_BPMP)
 145 int tegra_bpmp_init_powergates(struct tegra_bpmp *bpmp);
 146 #else
 147 static inline int tegra_bpmp_init_powergates(struct tegra_bpmp *bpmp)
 148 {
 149         return 0;
 150 }
 151 #endif
 152
 153 #endif /* __SOC_TEGRA_BPMP_H */