/* SPDX-License-Identifier: GPL-2.0-only */
/*
 * Copyright(c) 2021-2022 Intel Corporation. All rights reserved.
 *
 * Authors: Cezary Rojewski <cezary.rojewski@intel.com>
 *          Amadeusz Slawinski <amadeuszx.slawinski@linux.intel.com>
 */

#ifndef __SOUND_SOC_INTEL_AVS_H
#define __SOUND_SOC_INTEL_AVS_H

#include <linux/debugfs.h>
#include <linux/device.h>
#include <linux/firmware.h>
#include <linux/kfifo.h>
#include <sound/hda_codec.h>
#include <sound/hda_register.h>
#include <sound/soc-component.h>
#include "messages.h"
#include "registers.h"

struct avs_dev;
struct avs_tplg;
struct avs_tplg_library;
struct avs_soc_component;
struct avs_ipc_msg;

#ifdef CONFIG_ACPI
#define AVS_S0IX_SUPPORTED \
	(acpi_gbl_FADT.flags & ACPI_FADT_LOW_POWER_S0)
#else
#define AVS_S0IX_SUPPORTED false
#endif

/*
 * struct avs_dsp_ops - Platform-specific DSP operations
 *
 * @power: Power on or off DSP cores
 * @reset: Enter or exit reset state on DSP cores
 * @stall: Stall or run DSP cores
 * @irq_handler: Top half of IPC servicing
 * @irq_thread: Bottom half of IPC servicing
 * @int_control: Enable or disable IPC interrupts
 */
struct avs_dsp_ops {
	int (* const power)(struct avs_dev *, u32, bool);
	int (* const reset)(struct avs_dev *, u32, bool);
	int (* const stall)(struct avs_dev *, u32, bool);
	irqreturn_t (* const irq_handler)(int, void *);
	irqreturn_t (* const irq_thread)(int, void *);
	void (* const int_control)(struct avs_dev *, bool);
	int (* const load_basefw)(struct avs_dev *, struct firmware *);
	int (* const load_lib)(struct avs_dev *, struct firmware *, u32);
	int (* const transfer_mods)(struct avs_dev *, bool, struct avs_module_entry *, u32);
	int (* const enable_logs)(struct avs_dev *, enum avs_log_enable, u32, u32, unsigned long,
				  u32 *);
	int (* const log_buffer_offset)(struct avs_dev *, u32);
	int (* const log_buffer_status)(struct avs_dev *, union avs_notify_msg *);
	int (* const coredump)(struct avs_dev *, union avs_notify_msg *);
	bool (* const d0ix_toggle)(struct avs_dev *, struct avs_ipc_msg *, bool);
	int (* const set_d0ix)(struct avs_dev *, bool);
};

#define avs_dsp_op(adev, op, ...) \
	((adev)->spec->dsp_ops->op(adev, ## __VA_ARGS__))

extern const struct avs_dsp_ops skl_dsp_ops;
extern const struct avs_dsp_ops apl_dsp_ops;

#define AVS_PLATATTR_CLDMA		BIT_ULL(0)
#define AVS_PLATATTR_IMR		BIT_ULL(1)

#define avs_platattr_test(adev, attr) \
	((adev)->spec->attributes & AVS_PLATATTR_##attr)

/* Platform specific descriptor */
struct avs_spec {
	const char *name;

	const struct avs_dsp_ops *const dsp_ops;
	struct avs_fw_version min_fw_version; /* anything below is rejected */

	const u32 core_init_mask;	/* used during DSP boot */
	const u64 attributes;		/* bitmask of AVS_PLATATTR_* */
	const u32 sram_base_offset;
	const u32 sram_window_size;
	const u32 rom_status;
};

struct avs_fw_entry {
	char *name;
	const struct firmware *fw;

	struct list_head node;
};

/*
 * struct avs_dev - Intel HD-Audio driver data
 *
 * @dev: PCI device
 * @dsp_ba: DSP bar address
 * @spec: platform-specific descriptor
 * @fw_cfg: Firmware configuration, obtained through FW_CONFIG message
 * @hw_cfg: Hardware configuration, obtained through HW_CONFIG message
 * @mods_info: Available module-types, obtained through MODULES_INFO message
 * @mod_idas: Module instance ID pool, one per module-type
 * @modres_mutex: For synchronizing any @mods_info updates
 * @ppl_ida: Pipeline instance ID pool
 * @fw_list: List of libraries loaded, including base firmware
 */
struct avs_dev {
	struct hda_bus base;
	struct device *dev;

	void __iomem *dsp_ba;
	const struct avs_spec *spec;
	struct avs_ipc *ipc;

	struct avs_fw_cfg fw_cfg;
	struct avs_hw_cfg hw_cfg;
	struct avs_mods_info *mods_info;
	struct ida **mod_idas;
	struct mutex modres_mutex;
	struct ida ppl_ida;
	struct list_head fw_list;
	int *core_refs;		/* reference count per core */
	char **lib_names;
	int num_lp_paths;

	struct completion fw_ready;
	struct work_struct probe_work;

	struct nhlt_acpi_table *nhlt;
	struct list_head comp_list;
	struct mutex comp_list_mutex;
	struct list_head path_list;
	spinlock_t path_list_lock;
	struct mutex path_mutex;

	spinlock_t trace_lock;	/* serialize debug window I/O between each LOG_BUFFER_STATUS */
#ifdef CONFIG_DEBUG_FS
	struct kfifo trace_fifo;
	wait_queue_head_t trace_waitq;
	u32 aging_timer_period;
	u32 fifo_full_timer_period;
	u32 logged_resources;	/* context dependent: core or library */
	struct dentry *debugfs_root;
	/* probes */
	struct hdac_ext_stream *extractor;
	unsigned int num_probe_streams;
#endif
};

/* from hda_bus to avs_dev */
#define hda_to_avs(hda) container_of(hda, struct avs_dev, base)
/* from hdac_bus to avs_dev */
#define hdac_to_avs(hdac) hda_to_avs(to_hda_bus(hdac))
/* from device to avs_dev */
#define to_avs_dev(dev) \
({ \
	struct hdac_bus *__bus = dev_get_drvdata(dev); \
	hdac_to_avs(__bus); \
})

int avs_dsp_core_power(struct avs_dev *adev, u32 core_mask, bool power);
int avs_dsp_core_reset(struct avs_dev *adev, u32 core_mask, bool reset);
int avs_dsp_core_stall(struct avs_dev *adev, u32 core_mask, bool stall);
int avs_dsp_core_enable(struct avs_dev *adev, u32 core_mask);
int avs_dsp_core_disable(struct avs_dev *adev, u32 core_mask);

/* Inter Process Communication */

struct avs_ipc_msg {
	union {
		u64 header;
		union avs_global_msg glb;
		union avs_reply_msg rsp;
	};
	void *data;
	size_t size;
};

/*
 * struct avs_ipc - DSP IPC context
 *
 * @dev: PCI device
 * @rx: Reply message cache
 * @default_timeout_ms: default message timeout in MS
 * @ready: whether firmware is ready and communication is open
 * @rx_completed: whether RX for previously sent TX has been received
 * @rx_lock: for serializing manipulation of rx_* fields
 * @msg_lock: for synchronizing request handling
 * @done_completion: DONE-part of IPC i.e. ROM and ACKs from FW
 * @busy_completion: BUSY-part of IPC i.e. receiving responses from FW
 */
struct avs_ipc {
	struct device *dev;

	struct avs_ipc_msg rx;
	u32 default_timeout_ms;
	bool ready;
	atomic_t recovering;

	bool rx_completed;
	spinlock_t rx_lock;
	struct mutex msg_mutex;
	struct completion done_completion;
	struct completion busy_completion;

	struct work_struct recovery_work;
	struct delayed_work d0ix_work;
	atomic_t d0ix_disable_depth;
	bool in_d0ix;
};

#define AVS_EIPC	EREMOTEIO
/*
 * IPC handlers may return positive value (firmware error code) what denotes
 * successful HOST <-> DSP communication yet failure to process specific request.
 *
 * Below macro converts returned value to linux kernel error code.
 * All IPC callers MUST use it as soon as firmware error code is consumed.
 */
#define AVS_IPC_RET(ret) \
	(((ret) <= 0) ? (ret) : -AVS_EIPC)

static inline void avs_ipc_err(struct avs_dev *adev, struct avs_ipc_msg *tx,
			       const char *name, int error)
{
	/*
	 * If IPC channel is blocked e.g.: due to ongoing recovery,
	 * -EPERM error code is expected and thus it's not an actual error.
	 *
	 * Unsupported IPCs are of no harm either.
	 */
	if (error == -EPERM || error == AVS_IPC_NOT_SUPPORTED)
		dev_dbg(adev->dev, "%s 0x%08x 0x%08x failed: %d\n", name,
			tx->glb.primary, tx->glb.ext.val, error);
	else
		dev_err(adev->dev, "%s 0x%08x 0x%08x failed: %d\n", name,
			tx->glb.primary, tx->glb.ext.val, error);
}

irqreturn_t avs_dsp_irq_handler(int irq, void *dev_id);
irqreturn_t avs_dsp_irq_thread(int irq, void *dev_id);
void avs_dsp_process_response(struct avs_dev *adev, u64 header);
int avs_dsp_send_msg_timeout(struct avs_dev *adev,
			     struct avs_ipc_msg *request,
			     struct avs_ipc_msg *reply, int timeout);
int avs_dsp_send_msg(struct avs_dev *adev,
		     struct avs_ipc_msg *request, struct avs_ipc_msg *reply);
/* Two variants below are for messages that control DSP power states. */
int avs_dsp_send_pm_msg_timeout(struct avs_dev *adev, struct avs_ipc_msg *request,
				struct avs_ipc_msg *reply, int timeout, bool wake_d0i0);
int avs_dsp_send_pm_msg(struct avs_dev *adev, struct avs_ipc_msg *request,
			struct avs_ipc_msg *reply, bool wake_d0i0);
int avs_dsp_send_rom_msg_timeout(struct avs_dev *adev,
				 struct avs_ipc_msg *request, int timeout);
int avs_dsp_send_rom_msg(struct avs_dev *adev, struct avs_ipc_msg *request);
void avs_dsp_interrupt_control(struct avs_dev *adev, bool enable);
int avs_ipc_init(struct avs_ipc *ipc, struct device *dev);
void avs_ipc_block(struct avs_ipc *ipc);

int avs_dsp_disable_d0ix(struct avs_dev *adev);
int avs_dsp_enable_d0ix(struct avs_dev *adev);

int skl_log_buffer_offset(struct avs_dev *adev, u32 core);

/* Firmware resources management */

int avs_get_module_entry(struct avs_dev *adev, const guid_t *uuid, struct avs_module_entry *entry);
int avs_get_module_id_entry(struct avs_dev *adev, u32 module_id, struct avs_module_entry *entry);
int avs_get_module_id(struct avs_dev *adev, const guid_t *uuid);
bool avs_is_module_ida_empty(struct avs_dev *adev, u32 module_id);

int avs_module_info_init(struct avs_dev *adev, bool purge);
void avs_module_info_free(struct avs_dev *adev);
int avs_module_id_alloc(struct avs_dev *adev, u16 module_id);
void avs_module_id_free(struct avs_dev *adev, u16 module_id, u8 instance_id);
int avs_request_firmware(struct avs_dev *adev, const struct firmware **fw_p, const char *name);
void avs_release_last_firmware(struct avs_dev *adev);
void avs_release_firmwares(struct avs_dev *adev);

int avs_dsp_init_module(struct avs_dev *adev, u16 module_id, u8 ppl_instance_id,
			u8 core_id, u8 domain, void *param, u32 param_size,
			u8 *instance_id);
void avs_dsp_delete_module(struct avs_dev *adev, u16 module_id, u8 instance_id,
			   u8 ppl_instance_id, u8 core_id);
int avs_dsp_create_pipeline(struct avs_dev *adev, u16 req_size, u8 priority,
			    bool lp, u16 attributes, u8 *instance_id);
int avs_dsp_delete_pipeline(struct avs_dev *adev, u8 instance_id);

/* Firmware loading */

void avs_hda_clock_gating_enable(struct avs_dev *adev, bool enable);
void avs_hda_power_gating_enable(struct avs_dev *adev, bool enable);
void avs_hda_l1sen_enable(struct avs_dev *adev, bool enable);

int avs_dsp_load_libraries(struct avs_dev *adev, struct avs_tplg_library *libs, u32 num_libs);
int avs_dsp_boot_firmware(struct avs_dev *adev, bool purge);
int avs_dsp_first_boot_firmware(struct avs_dev *adev);

int avs_cldma_load_basefw(struct avs_dev *adev, struct firmware *fw);
int avs_cldma_load_library(struct avs_dev *adev, struct firmware *lib, u32 id);
int avs_cldma_transfer_modules(struct avs_dev *adev, bool load,
			       struct avs_module_entry *mods, u32 num_mods);
int avs_hda_load_basefw(struct avs_dev *adev, struct firmware *fw);
int avs_hda_load_library(struct avs_dev *adev, struct firmware *lib, u32 id);
int avs_hda_transfer_modules(struct avs_dev *adev, bool load,
			     struct avs_module_entry *mods, u32 num_mods);

/* Soc component members */

struct avs_soc_component {
	struct snd_soc_component base;
	struct avs_tplg *tplg;

	struct list_head node;
};

#define to_avs_soc_component(comp) \
	container_of(comp, struct avs_soc_component, base)

extern const struct snd_soc_dai_ops avs_dai_fe_ops;

int avs_soc_component_register(struct device *dev, const char *name,
			       const struct snd_soc_component_driver *drv,
			       struct snd_soc_dai_driver *cpu_dais, int num_cpu_dais);
int avs_dmic_platform_register(struct avs_dev *adev, const char *name);
int avs_i2s_platform_register(struct avs_dev *adev, const char *name, unsigned long port_mask,
			      unsigned long *tdms);
int avs_hda_platform_register(struct avs_dev *adev, const char *name);

int avs_register_all_boards(struct avs_dev *adev);
void avs_unregister_all_boards(struct avs_dev *adev);

/* Firmware tracing helpers */

#define avs_log_buffer_size(adev) \
	((adev)->fw_cfg.trace_log_bytes / (adev)->hw_cfg.dsp_cores)

#define avs_log_buffer_addr(adev, core) \
({ \
	s32 __offset = avs_dsp_op(adev, log_buffer_offset, core); \
	(__offset < 0) ? NULL : \
			 (avs_sram_addr(adev, AVS_DEBUG_WINDOW) + __offset); \
})

static inline int avs_log_buffer_status_locked(struct avs_dev *adev, union avs_notify_msg *msg)
{
	unsigned long flags;
	int ret;

	spin_lock_irqsave(&adev->trace_lock, flags);
	ret = avs_dsp_op(adev, log_buffer_status, msg);
	spin_unlock_irqrestore(&adev->trace_lock, flags);

	return ret;
}

struct apl_log_buffer_layout {
	u32 read_ptr;
	u32 write_ptr;
	u8 buffer[];
} __packed;

#define apl_log_payload_size(adev) \
	(avs_log_buffer_size(adev) - sizeof(struct apl_log_buffer_layout))

#define apl_log_payload_addr(addr) \
	(addr + sizeof(struct apl_log_buffer_layout))

#ifdef CONFIG_DEBUG_FS
#define AVS_SET_ENABLE_LOGS_OP(name) \
	.enable_logs = name##_enable_logs

bool avs_logging_fw(struct avs_dev *adev);
void avs_dump_fw_log(struct avs_dev *adev, const void __iomem *src, unsigned int len);
void avs_dump_fw_log_wakeup(struct avs_dev *adev, const void __iomem *src, unsigned int len);

int avs_probe_platform_register(struct avs_dev *adev, const char *name);

void avs_debugfs_init(struct avs_dev *adev);
void avs_debugfs_exit(struct avs_dev *adev);
#else
#define AVS_SET_ENABLE_LOGS_OP(name)

static inline bool avs_logging_fw(struct avs_dev *adev)
{
	return false;
}

static inline void avs_dump_fw_log(struct avs_dev *adev, const void __iomem *src, unsigned int len)
{
}

static inline void
avs_dump_fw_log_wakeup(struct avs_dev *adev, const void __iomem *src, unsigned int len)
{
}

static inline int avs_probe_platform_register(struct avs_dev *adev, const char *name)
{
	return 0;
}

static inline void avs_debugfs_init(struct avs_dev *adev) { }
static inline void avs_debugfs_exit(struct avs_dev *adev) { }
#endif

#endif /* __SOUND_SOC_INTEL_AVS_H */