/* SPDX-License-Identifier: GPL-2.0-only */
/*
 * Copyright (c) 2016, NVIDIA CORPORATION.  All rights reserved.
 */

#ifndef __SOC_TEGRA_BPMP_H
#define __SOC_TEGRA_BPMP_H

#include <linux/iosys-map.h>
#include <linux/mailbox_client.h>
#include <linux/pm_domain.h>
#include <linux/reset-controller.h>
#include <linux/semaphore.h>
#include <linux/types.h>

#include <soc/tegra/bpmp-abi.h>

struct tegra_bpmp_clk;
struct tegra_bpmp_ops;

struct tegra_bpmp_soc {
        struct {
                struct {
                        unsigned int offset;
                        unsigned int count;
                        unsigned int timeout;
                } cpu_tx, thread, cpu_rx;
        } channels;

        const struct tegra_bpmp_ops *ops;
        unsigned int num_resets;
};

struct tegra_bpmp_mb_data {
        u32 code;
        u32 flags;
        u8 data[MSG_DATA_MIN_SZ];
} __packed;

#define tegra_bpmp_mb_read(dst, mb, size) \
        iosys_map_memcpy_from(dst, mb, offsetof(struct tegra_bpmp_mb_data, data), size)

#define tegra_bpmp_mb_write(mb, src, size) \
        iosys_map_memcpy_to(mb, offsetof(struct tegra_bpmp_mb_data, data), src, size)

#define tegra_bpmp_mb_read_field(mb, field) \
        iosys_map_rd_field(mb, 0, struct tegra_bpmp_mb_data, field)

#define tegra_bpmp_mb_write_field(mb, field, value) \
        iosys_map_wr_field(mb, 0, struct tegra_bpmp_mb_data, field, value)

struct tegra_bpmp_channel {
        struct tegra_bpmp *bpmp;
        struct iosys_map ib;
        struct iosys_map ob;
        struct completion completion;
        struct tegra_ivc *ivc;
        unsigned int index;
};

typedef void (*tegra_bpmp_mrq_handler_t)(unsigned int mrq,
                                         struct tegra_bpmp_channel *channel,
                                         void *data);

struct tegra_bpmp_mrq {
        struct list_head list;
        unsigned int mrq;
        tegra_bpmp_mrq_handler_t handler;
        void *data;
};

struct tegra_bpmp {
        const struct tegra_bpmp_soc *soc;
        struct device *dev;
        void *priv;

        struct {
                struct mbox_client client;
                struct mbox_chan *channel;
        } mbox;

        spinlock_t atomic_tx_lock;
        struct tegra_bpmp_channel *tx_channel, *rx_channel, *threaded_channels;

        struct {
                unsigned long *allocated;
                unsigned long *busy;
                unsigned int count;
                struct semaphore lock;
        } threaded;

        struct list_head mrqs;
        spinlock_t lock;

        struct tegra_bpmp_clk **clocks;
        unsigned int num_clocks;

        struct reset_controller_dev rstc;

        struct genpd_onecell_data genpd;

#ifdef CONFIG_DEBUG_FS
        struct dentry *debugfs_mirror;
#endif

        bool suspended;
};

#define TEGRA_BPMP_MESSAGE_RESET BIT(0)

struct tegra_bpmp_message {
        unsigned int mrq;

        struct {
                const void *data;
                size_t size;
        } tx;

        struct {
                void *data;
                size_t size;
                int ret;
        } rx;

        unsigned long flags;
};

#if IS_ENABLED(CONFIG_TEGRA_BPMP)
struct tegra_bpmp *tegra_bpmp_get(struct device *dev);
void tegra_bpmp_put(struct tegra_bpmp *bpmp);
int tegra_bpmp_transfer_atomic(struct tegra_bpmp *bpmp,
                               struct tegra_bpmp_message *msg);
int tegra_bpmp_transfer(struct tegra_bpmp *bpmp,
                        struct tegra_bpmp_message *msg);
void tegra_bpmp_mrq_return(struct tegra_bpmp_channel *channel, int code,
                           const void *data, size_t size);

int tegra_bpmp_request_mrq(struct tegra_bpmp *bpmp, unsigned int mrq,
                           tegra_bpmp_mrq_handler_t handler, void *data);
void tegra_bpmp_free_mrq(struct tegra_bpmp *bpmp, unsigned int mrq,
                         void *data);
bool tegra_bpmp_mrq_is_supported(struct tegra_bpmp *bpmp, unsigned int mrq);
#else
static inline struct tegra_bpmp *tegra_bpmp_get(struct device *dev)
{
        return ERR_PTR(-ENOTSUPP);
}
static inline void tegra_bpmp_put(struct tegra_bpmp *bpmp)
{
}
static inline int tegra_bpmp_transfer_atomic(struct tegra_bpmp *bpmp,
                                             struct tegra_bpmp_message *msg)
{
        return -ENOTSUPP;
}
static inline int tegra_bpmp_transfer(struct tegra_bpmp *bpmp,
                                      struct tegra_bpmp_message *msg)
{
        return -ENOTSUPP;
}
static inline void tegra_bpmp_mrq_return(struct tegra_bpmp_channel *channel,
                                         int code, const void *data,
                                         size_t size)
{
}

static inline int tegra_bpmp_request_mrq(struct tegra_bpmp *bpmp,
                                         unsigned int mrq,
                                         tegra_bpmp_mrq_handler_t handler,
                                         void *data)
{
        return -ENOTSUPP;
}
static inline void tegra_bpmp_free_mrq(struct tegra_bpmp *bpmp,
                                       unsigned int mrq, void *data)
{
}

static inline bool tegra_bpmp_mrq_is_supported(struct tegra_bpmp *bpmp,
                                              unsigned int mrq)
{
        return false;
}
#endif

void tegra_bpmp_handle_rx(struct tegra_bpmp *bpmp);

#if IS_ENABLED(CONFIG_CLK_TEGRA_BPMP)
int tegra_bpmp_init_clocks(struct tegra_bpmp *bpmp);
#else
static inline int tegra_bpmp_init_clocks(struct tegra_bpmp *bpmp)
{
        return 0;
}
#endif

#if IS_ENABLED(CONFIG_RESET_TEGRA_BPMP)
int tegra_bpmp_init_resets(struct tegra_bpmp *bpmp);
#else
static inline int tegra_bpmp_init_resets(struct tegra_bpmp *bpmp)
{
        return 0;
}
#endif

#if IS_ENABLED(CONFIG_SOC_TEGRA_POWERGATE_BPMP)
int tegra_bpmp_init_powergates(struct tegra_bpmp *bpmp);
#else
static inline int tegra_bpmp_init_powergates(struct tegra_bpmp *bpmp)
{
        return 0;
}
#endif

#if IS_ENABLED(CONFIG_DEBUG_FS)
int tegra_bpmp_init_debugfs(struct tegra_bpmp *bpmp);
#else
static inline int tegra_bpmp_init_debugfs(struct tegra_bpmp *bpmp)
{
        return 0;
}
#endif


#endif /* __SOC_TEGRA_BPMP_H */