dmub_srv.h

/*
 * Copyright 2019 Advanced Micro Devices, Inc.
 *
 * Permission is hereby granted, free of charge, to any person obtaining a
 * copy of this software and associated documentation files (the "Software"),
 * to deal in the Software without restriction, including without limitation
 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
 * and/or sell copies of the Software, and to permit persons to whom the
 * Software is furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in
 * all copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
 * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
 * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
 * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
 * OTHER DEALINGS IN THE SOFTWARE.
 *
 * Authors: AMD
 *
 */

#ifndef _DMUB_SRV_H_
#define _DMUB_SRV_H_

/**
 * DOC: DMUB interface and operation
 *
 * DMUB is the interface to the display DMCUB microcontroller on DCN hardware.
 * It delegates hardware initialization and command submission to the
 * microcontroller. DMUB is the shortname for DMCUB.
 *
 * This interface is not thread-safe. Ensure that all access to the interface
 * is properly synchronized by the caller.
 *
 * Initialization and usage of the DMUB service should be done in the
 * steps given below:
 *
 * 1. dmub_srv_create()
 * 2. dmub_srv_has_hw_support()
 * 3. dmub_srv_calc_region_info()
 * 4. dmub_srv_hw_init()
 *
 * The call to dmub_srv_create() is required to use the server.
 *
 * The calls to dmub_srv_has_hw_support() and dmub_srv_calc_region_info()
 * are helpers to query cache window size and allocate framebuffer(s)
 * for the cache windows.
 *
 * The call to dmub_srv_hw_init() programs the DMCUB registers to prepare
 * for command submission. Commands can be queued via dmub_srv_fb_cmd_queue()
 * and executed via dmub_srv_fb_cmd_execute().
 *
 * If the queue is full the dmub_srv_wait_for_idle() call can be used to
 * wait until the queue has been cleared.
 *
 * Destroying the DMUB service can be done by calling dmub_srv_destroy().
 * This does not clear DMUB hardware state, only software state.
 *
 * The interface is intended to be standalone and should not depend on any
 * other component within DAL.
 */

#include "inc/dmub_cmd.h"
#include "dc/dc_types.h"

#define DMUB_PC_SNAPSHOT_COUNT 10

/* Default tracebuffer size if meta is absent. */
#define DMUB_TRACE_BUFFER_SIZE (64 * 1024)

#define PSP_HEADER_BYTES_256 0x100 // 256 bytes
#define PSP_FOOTER_BYTES_256 0x100 // 256 bytes

/* Forward declarations */
struct dmub_srv;
struct dmub_srv_common_regs;
struct dmub_srv_dcn31_regs;

struct dmcub_trace_buf_entry;

/* enum dmub_window_memory_type - memory location type specification for windows */
enum dmub_window_memory_type {
	DMUB_WINDOW_MEMORY_TYPE_FB = 0,
	DMUB_WINDOW_MEMORY_TYPE_GART
};

/* enum dmub_status - return code for dmcub functions */
enum dmub_status {
	DMUB_STATUS_OK = 0,
	DMUB_STATUS_NO_CTX,
	DMUB_STATUS_QUEUE_FULL,
	DMUB_STATUS_TIMEOUT,
	DMUB_STATUS_INVALID,
	DMUB_STATUS_HW_FAILURE,
	DMUB_STATUS_POWER_STATE_D3
};

/* enum dmub_asic - dmub asic identifier */
enum dmub_asic {
	DMUB_ASIC_NONE = 0,
	DMUB_ASIC_DCN20,
	DMUB_ASIC_DCN21,
	DMUB_ASIC_DCN30,
	DMUB_ASIC_DCN301,
	DMUB_ASIC_DCN302,
	DMUB_ASIC_DCN303,
	DMUB_ASIC_DCN31,
	DMUB_ASIC_DCN31B,
	DMUB_ASIC_DCN314,
	DMUB_ASIC_DCN315,
	DMUB_ASIC_DCN316,
	DMUB_ASIC_DCN32,
	DMUB_ASIC_DCN321,
	DMUB_ASIC_DCN35,
	DMUB_ASIC_DCN351,
	DMUB_ASIC_DCN36,
	DMUB_ASIC_DCN401,
	DMUB_ASIC_MAX,
};

/* enum dmub_window_id - dmub window identifier */
enum dmub_window_id {
	DMUB_WINDOW_0_INST_CONST = 0,
	DMUB_WINDOW_1_STACK,
	DMUB_WINDOW_2_BSS_DATA,
	DMUB_WINDOW_3_VBIOS,
	DMUB_WINDOW_4_MAILBOX,
	DMUB_WINDOW_5_TRACEBUFF,
	DMUB_WINDOW_6_FW_STATE,
	DMUB_WINDOW_7_SCRATCH_MEM,
	DMUB_WINDOW_IB_MEM,
	DMUB_WINDOW_SHARED_STATE,
	DMUB_WINDOW_LSDMA_BUFFER,
	DMUB_WINDOW_CURSOR_OFFLOAD,
	DMUB_WINDOW_TOTAL,
};

/* enum dmub_notification_type - dmub outbox notification identifier */
enum dmub_notification_type {
	DMUB_NOTIFICATION_NO_DATA = 0,
	DMUB_NOTIFICATION_AUX_REPLY,
	DMUB_NOTIFICATION_HPD,
	DMUB_NOTIFICATION_HPD_IRQ,
	DMUB_NOTIFICATION_SET_CONFIG_REPLY,
	DMUB_NOTIFICATION_DPIA_NOTIFICATION,
	DMUB_NOTIFICATION_HPD_SENSE_NOTIFY,
	DMUB_NOTIFICATION_FUSED_IO,
	DMUB_NOTIFICATION_MAX
};

/**
 * DPIA NOTIFICATION Response Type
 */
enum dpia_notify_bw_alloc_status {

	DPIA_BW_REQ_FAILED = 0,
	DPIA_BW_REQ_SUCCESS,
	DPIA_EST_BW_CHANGED,
	DPIA_BW_ALLOC_CAPS_CHANGED
};

/* enum dmub_memory_access_type - memory access method */
enum dmub_memory_access_type {
	DMUB_MEMORY_ACCESS_DEFAULT,
	DMUB_MEMORY_ACCESS_CPU = DMUB_MEMORY_ACCESS_DEFAULT,
	DMUB_MEMORY_ACCESS_DMA
};

/* enum dmub_power_state type - to track DC power state in dmub_srv */
enum dmub_srv_power_state_type {
	DMUB_POWER_STATE_UNDEFINED = 0,
	DMUB_POWER_STATE_D0 = 1,
	DMUB_POWER_STATE_D3 = 8
};

/* enum dmub_inbox_cmd_interface type - defines default interface for host->dmub commands */
enum dmub_inbox_cmd_interface_type {
	DMUB_CMD_INTERFACE_DEFAULT = 0,
	DMUB_CMD_INTERFACE_FB = 1,
	DMUB_CMD_INTERFACE_REG = 2,
};

/**
 * struct dmub_region - dmub hw memory region
 * @base: base address for region, must be 256 byte aligned
 * @top: top address for region
 */
struct dmub_region {
	uint32_t base;
	uint32_t top;
};

/**
 * struct dmub_window - dmub hw cache window
 * @off: offset to the fb memory in gpu address space
 * @r: region in uc address space for cache window
 */
struct dmub_window {
	union dmub_addr offset;
	struct dmub_region region;
};

/**
 * struct dmub_fb - defines a dmub framebuffer memory region
 * @cpu_addr: cpu virtual address for the region, NULL if invalid
 * @gpu_addr: gpu virtual address for the region, NULL if invalid
 * @size: size of the region in bytes, zero if invalid
 */
struct dmub_fb {
	void *cpu_addr;
	uint64_t gpu_addr;
	uint32_t size;
};

/**
 * struct dmub_srv_region_params - params used for calculating dmub regions
 * @inst_const_size: size of the fw inst const section
 * @bss_data_size: size of the fw bss data section
 * @vbios_size: size of the vbios data
 * @fw_bss_data: raw firmware bss data section
 */
struct dmub_srv_region_params {
	uint32_t inst_const_size;
	uint32_t bss_data_size;
	uint32_t vbios_size;
	const uint8_t *fw_inst_const;
	const uint8_t *fw_bss_data;
	const enum dmub_window_memory_type *window_memory_type;
	const struct dmub_fw_meta_info *fw_info;
};

/**
 * struct dmub_srv_fw_meta_info_params - params used for fetching fw meta info from fw_image
 * @inst_const_size: size of the fw inst const section
 * @bss_data_size: size of the fw bss data section
 * @fw_inst_const: raw firmware inst const section
 * @fw_bss_data: raw firmware bss data section
 * @custom_psp_footer_size: custom psp footer size to use when indexing for fw meta info
 */
struct dmub_srv_fw_meta_info_params {
	uint32_t inst_const_size;
	uint32_t bss_data_size;
	const uint8_t *fw_inst_const;
	const uint8_t *fw_bss_data;
	uint32_t custom_psp_footer_size;
};

/**
 * struct dmub_srv_region_info - output region info from the dmub service
 * @fb_size: required minimum fb size for all regions, aligned to 4096 bytes
 * @num_regions: number of regions used by the dmub service
 * @regions: region info
 *
 * The regions are aligned such that they can be all placed within the
 * same framebuffer but they can also be placed into different framebuffers.
 *
 * The size of each region can be calculated by the caller:
 * size = reg.top - reg.base
 *
 * Care must be taken when performing custom allocations to ensure that each
 * region base address is 256 byte aligned.
 */
struct dmub_srv_region_info {
	uint32_t fb_size;
	uint32_t gart_size;
	uint8_t num_regions;
	struct dmub_region regions[DMUB_WINDOW_TOTAL];
	uint32_t verified_psp_footer_size;
};

/**
 * struct dmub_srv_memory_params - parameters used for driver fb setup
 * @region_info: region info calculated by dmub service
 * @cpu_fb_addr: base cpu address for the framebuffer
 * @cpu_inbox_addr: base cpu address for the gart
 * @gpu_fb_addr: base gpu virtual address for the framebuffer
 * @gpu_inbox_addr: base gpu virtual address for the gart
 */
struct dmub_srv_memory_params {
	const struct dmub_srv_region_info *region_info;
	void *cpu_fb_addr;
	void *cpu_gart_addr;
	uint64_t gpu_fb_addr;
	uint64_t gpu_gart_addr;
	const enum dmub_window_memory_type *window_memory_type;
};

/**
 * struct dmub_srv_fb_info - output fb info from the dmub service
 * @num_fbs: number of required dmub framebuffers
 * @fbs: fb data for each region
 *
 * Output from the dmub service helper that can be used by the
 * driver to prepare dmub_fb that can be passed into the dmub
 * hw init service.
 *
 * Assumes that all regions are within the same framebuffer
 * and have been setup according to the region_info generated
 * by the dmub service.
 */
struct dmub_srv_fb_info {
	uint8_t num_fb;
	struct dmub_fb fb[DMUB_WINDOW_TOTAL];
};

/**
 * struct dmub_soc_fb_info - relevant addresses from the frame buffer
 * @fb_base: base of the framebuffer aperture
 * @fb_offset: offset of the framebuffer aperture
 */
struct dmub_soc_fb_info {
	uint64_t fb_base;
	uint64_t fb_offset;
};

/*
 * struct dmub_srv_hw_params - params for dmub hardware initialization
 * @fb: framebuffer info for each region
 * @fb_base: base of the framebuffer aperture
 * @fb_offset: offset of the framebuffer aperture
 * @psp_version: psp version to pass for DMCU init
 * @load_inst_const: true if DMUB should load inst const fw
 */
struct dmub_srv_hw_params {
	struct dmub_fb *fb[DMUB_WINDOW_TOTAL];
	struct dmub_soc_fb_info soc_fb_info;
	uint32_t psp_version;
	bool load_inst_const;
	bool skip_panel_power_sequence;
	bool disable_z10;
	bool power_optimization;
	bool dpia_supported;
	bool disable_dpia;
	bool usb4_cm_version;
	bool fw_in_system_memory;
	bool dpia_hpd_int_enable_supported;
	bool disable_clock_gate;
	bool disallow_dispclk_dppclk_ds;
	bool ips_sequential_ono;
	enum dmub_memory_access_type mem_access_type;
	enum dmub_ips_disable_type disable_ips;
	bool disallow_phy_access;
	bool disable_sldo_opt;
	bool enable_non_transparent_setconfig;
	bool lower_hbr3_phy_ssc;
	bool override_hbr3_pll_vco;
	bool disable_dpia_bw_allocation;
};

/**
 * struct dmub_srv_debug - Debug info for dmub_srv
 * @timeout_occured: Indicates a timeout occured on any message from driver to dmub
 * @timeout_cmd: first cmd sent from driver that timed out - subsequent timeouts are not stored
 */
struct dmub_timeout_info {
	bool timeout_occured;
	union dmub_rb_cmd timeout_cmd;
	unsigned long long timestamp;
};

/**
 * struct dmub_diagnostic_data - Diagnostic data retrieved from DMCUB for
 * debugging purposes, including logging, crash analysis, etc.
 */
struct dmub_diagnostic_data {
	uint32_t dmcub_version;
	uint32_t scratch[17];
	uint32_t pc[DMUB_PC_SNAPSHOT_COUNT];
	uint32_t undefined_address_fault_addr;
	uint32_t inst_fetch_fault_addr;
	uint32_t data_write_fault_addr;
	uint32_t inbox1_rptr;
	uint32_t inbox1_wptr;
	uint32_t inbox1_size;
	uint32_t inbox0_rptr;
	uint32_t inbox0_wptr;
	uint32_t inbox0_size;
	uint32_t outbox1_rptr;
	uint32_t outbox1_wptr;
	uint32_t outbox1_size;
	uint32_t gpint_datain0;
	struct dmub_timeout_info timeout_info;
	uint8_t is_dmcub_enabled : 1;
	uint8_t is_dmcub_soft_reset : 1;
	uint8_t is_dmcub_secure_reset : 1;
	uint8_t is_traceport_en : 1;
	uint8_t is_cw0_enabled : 1;
	uint8_t is_cw6_enabled : 1;
	uint8_t is_pwait : 1;
};

/**
 * struct dmub_preos_info - preos fw info before loading post os fw.
 */
struct dmub_preos_info {
	uint64_t fb_base;
	uint64_t fb_offset;
	uint64_t trace_buffer_phy_addr;
	uint32_t trace_buffer_size;
	uint32_t fw_version;
	uint32_t boot_status;
	uint32_t boot_options;
};

struct dmub_srv_inbox {
	/* generic status */
	uint64_t num_submitted;
	uint64_t num_reported;
	union {
		/* frame buffer mailbox status */
		struct dmub_rb rb;
		/* register mailbox status */
		struct {
			bool is_pending;
			bool is_multi_pending;
		};
	};
};

/**
 * struct dmub_srv_base_funcs - Driver specific base callbacks
 */
struct dmub_srv_base_funcs {
	/**
	 * @reg_read:
	 *
	 * Hook for reading a register.
	 *
	 * Return: The 32-bit register value from the given address.
	 */
	uint32_t (*reg_read)(void *ctx, uint32_t address);

	/**
	 * @reg_write:
	 *
	 * Hook for writing a value to the register specified by address.
	 */
	void (*reg_write)(void *ctx, uint32_t address, uint32_t value);
};

/**
 * struct dmub_srv_hw_funcs - hardware sequencer funcs for dmub
 */
struct dmub_srv_hw_funcs {
	/* private: internal use only */

	void (*init)(struct dmub_srv *dmub);

	void (*reset)(struct dmub_srv *dmub);

	void (*reset_release)(struct dmub_srv *dmub);

	void (*backdoor_load)(struct dmub_srv *dmub,
			      const struct dmub_window *cw0,
			      const struct dmub_window *cw1);

	void (*backdoor_load_zfb_mode)(struct dmub_srv *dmub,
			      const struct dmub_window *cw0,
			      const struct dmub_window *cw1);
	void (*setup_windows)(struct dmub_srv *dmub,
			      const struct dmub_window *cw2,
			      const struct dmub_window *cw3,
			      const struct dmub_window *cw4,
			      const struct dmub_window *cw5,
			      const struct dmub_window *cw6,
			      const struct dmub_window *region6);

	void (*setup_mailbox)(struct dmub_srv *dmub,
			      const struct dmub_region *inbox1);

	uint32_t (*get_inbox1_wptr)(struct dmub_srv *dmub);

	uint32_t (*get_inbox1_rptr)(struct dmub_srv *dmub);

	void (*set_inbox1_wptr)(struct dmub_srv *dmub, uint32_t wptr_offset);

	void (*setup_out_mailbox)(struct dmub_srv *dmub,
			      const struct dmub_region *outbox1);

	uint32_t (*get_outbox1_wptr)(struct dmub_srv *dmub);

	void (*set_outbox1_rptr)(struct dmub_srv *dmub, uint32_t rptr_offset);

	void (*setup_outbox0)(struct dmub_srv *dmub,
			      const struct dmub_region *outbox0);

	uint32_t (*get_outbox0_wptr)(struct dmub_srv *dmub);

	void (*set_outbox0_rptr)(struct dmub_srv *dmub, uint32_t rptr_offset);

	uint32_t (*emul_get_inbox1_rptr)(struct dmub_srv *dmub);

	uint32_t (*emul_get_inbox1_wptr)(struct dmub_srv *dmub);

	void (*emul_set_inbox1_wptr)(struct dmub_srv *dmub, uint32_t wptr_offset);

	bool (*is_supported)(struct dmub_srv *dmub);

	bool (*is_psrsu_supported)(struct dmub_srv *dmub);

	bool (*is_hw_init)(struct dmub_srv *dmub);
	bool (*is_hw_powered_up)(struct dmub_srv *dmub);

	void (*enable_dmub_boot_options)(struct dmub_srv *dmub,
				const struct dmub_srv_hw_params *params);

	void (*skip_dmub_panel_power_sequence)(struct dmub_srv *dmub, bool skip);

	union dmub_fw_boot_status (*get_fw_status)(struct dmub_srv *dmub);

	union dmub_fw_boot_options (*get_fw_boot_option)(struct dmub_srv *dmub);

	void (*set_gpint)(struct dmub_srv *dmub,
			  union dmub_gpint_data_register reg);

	bool (*is_gpint_acked)(struct dmub_srv *dmub,
			       union dmub_gpint_data_register reg);

	uint32_t (*get_gpint_response)(struct dmub_srv *dmub);

	uint32_t (*get_gpint_dataout)(struct dmub_srv *dmub);

	void (*configure_dmub_in_system_memory)(struct dmub_srv *dmub);
	void (*clear_inbox0_ack_register)(struct dmub_srv *dmub);
	uint32_t (*read_inbox0_ack_register)(struct dmub_srv *dmub);
	void (*send_inbox0_cmd)(struct dmub_srv *dmub, union dmub_inbox0_data_register data);
	uint32_t (*get_current_time)(struct dmub_srv *dmub);

	void (*get_diagnostic_data)(struct dmub_srv *dmub);
	bool (*get_preos_fw_info)(struct dmub_srv *dmub);

	bool (*should_detect)(struct dmub_srv *dmub);
	void (*init_reg_offsets)(struct dmub_srv *dmub, struct dc_context *ctx);

	void (*subvp_save_surf_addr)(struct dmub_srv *dmub, const struct dc_plane_address *addr, uint8_t subvp_index);

	void (*send_reg_inbox0_cmd_msg)(struct dmub_srv *dmub,
			union dmub_rb_cmd *cmd);
	uint32_t (*read_reg_inbox0_rsp_int_status)(struct dmub_srv *dmub);
	void (*read_reg_inbox0_cmd_rsp)(struct dmub_srv *dmub,
			union dmub_rb_cmd *cmd);
	void (*write_reg_inbox0_rsp_int_ack)(struct dmub_srv *dmub);
	void (*clear_reg_inbox0_rsp_int_ack)(struct dmub_srv *dmub);
	void (*enable_reg_inbox0_rsp_int)(struct dmub_srv *dmub, bool enable);

	uint32_t (*read_reg_outbox0_rdy_int_status)(struct dmub_srv *dmub);
	void (*write_reg_outbox0_rdy_int_ack)(struct dmub_srv *dmub);
	void (*read_reg_outbox0_msg)(struct dmub_srv *dmub, uint32_t *msg);
	void (*write_reg_outbox0_rsp)(struct dmub_srv *dmub, uint32_t *rsp);
	uint32_t (*read_reg_outbox0_rsp_int_status)(struct dmub_srv *dmub);
	void (*enable_reg_outbox0_rdy_int)(struct dmub_srv *dmub, bool enable);
};

/**
 * struct dmub_srv_create_params - params for dmub service creation
 * @base_funcs: driver supplied base routines
 * @hw_funcs: optional overrides for hw funcs
 * @user_ctx: context data for callback funcs
 * @asic: driver supplied asic
 * @fw_version: the current firmware version, if any
 * @is_virtual: false for hw support only
 */
struct dmub_srv_create_params {
	struct dmub_srv_base_funcs funcs;
	struct dmub_srv_hw_funcs *hw_funcs;
	void *user_ctx;
	enum dmub_asic asic;
	uint32_t fw_version;
	bool is_virtual;
	enum dmub_inbox_cmd_interface_type inbox_type;
};

/**
 * struct dmub_srv - software state for dmcub
 * @asic: dmub asic identifier
 * @user_ctx: user provided context for the dmub_srv
 * @fw_version: the current firmware version, if any
 * @is_virtual: false if hardware support only
 * @shared_state: dmub shared state between firmware and driver
 * @cursor_offload_v1: Cursor offload state
 * @fw_state: dmub firmware state pointer (debug purpose only)
 */
struct dmub_srv {
	enum dmub_asic asic;
	void *user_ctx;
	uint32_t fw_version;
	bool is_virtual;
	struct dmub_fb scratch_mem_fb;
	struct dmub_fb ib_mem_gart;
	struct dmub_fb cursor_offload_fb;
	volatile struct dmub_shared_state_feature_block *shared_state;
	volatile struct dmub_cursor_offload_v1 *cursor_offload_v1;
	volatile const struct dmub_fw_state *fw_state;

	/* private: internal use only */
	const struct dmub_srv_common_regs *regs;
	const struct dmub_srv_dcn31_regs *regs_dcn31;
	struct dmub_srv_dcn32_regs *regs_dcn32;
	struct dmub_srv_dcn35_regs *regs_dcn35;
	const struct dmub_srv_dcn401_regs *regs_dcn401;
	struct dmub_srv_base_funcs funcs;
	struct dmub_srv_hw_funcs hw_funcs;
	struct dmub_srv_inbox inbox1;
	uint32_t inbox1_last_wptr;
	struct dmub_srv_inbox reg_inbox0;
	/**
	 * outbox1_rb is accessed without locks (dal & dc)
	 * and to be used only in dmub_srv_stat_get_notification()
	 */
	struct dmub_rb outbox1_rb;

	struct dmub_rb outbox0_rb;

	bool sw_init;
	bool hw_init;
	bool dpia_supported;

	struct dmub_soc_fb_info soc_fb_info;
	uint32_t psp_version;

	/* Feature capabilities reported by fw */
	struct dmub_fw_meta_info meta_info;
	struct dmub_feature_caps feature_caps;
	struct dmub_visual_confirm_color visual_confirm_color;
	enum dmub_inbox_cmd_interface_type inbox_type;

	enum dmub_srv_power_state_type power_state;
	struct dmub_diagnostic_data debug;
	struct dmub_fb lsdma_rb_fb;
	struct dmub_preos_info preos_info;
};

/**
 * struct dmub_notification - dmub notification data
 * @type: dmub notification type
 * @link_index: link index to identify aux connection
 * @result: USB4 status returned from dmub
 * @pending_notification: Indicates there are other pending notifications
 * @aux_reply: aux reply
 * @hpd_status: hpd status
 * @bw_alloc_reply: BW Allocation reply from CM/DPIA
 */
struct dmub_notification {
	enum dmub_notification_type type;
	uint8_t link_index;
	uint8_t result;
	/* notify instance from DMUB */
	uint8_t instance;
	bool pending_notification;
	union {
		struct aux_reply_data aux_reply;
		enum dp_hpd_status hpd_status;
		enum set_config_status sc_status;
		struct dmub_rb_cmd_hpd_sense_notify_data hpd_sense_notify;
		struct dmub_cmd_fused_request fused_request;
	};
};

/**
 * DMUB firmware version helper macro - useful for checking if the version
 * of a firmware to know if feature or functionality is supported or present.
 */
#define DMUB_FW_VERSION(major, minor, revision) \
	((((major) & 0xFF) << 24) | (((minor) & 0xFF) << 16) | (((revision) & 0xFF) << 8))

/**
 * dmub_srv_create() - creates the DMUB service.
 * @dmub: the dmub service
 * @params: creation parameters for the service
 *
 * Return:
 *   DMUB_STATUS_OK - success
 *   DMUB_STATUS_INVALID - unspecified error
 */
enum dmub_status dmub_srv_create(struct dmub_srv *dmub,
				 const struct dmub_srv_create_params *params);

/**
 * dmub_srv_destroy() - destroys the DMUB service.
 * @dmub: the dmub service
 */
void dmub_srv_destroy(struct dmub_srv *dmub);

/**
 * dmub_srv_calc_region_info() - retreives region info from the dmub service
 * @dmub: the dmub service
 * @params: parameters used to calculate region locations
 * @info_out: the output region info from dmub
 *
 * Calculates the base and top address for all relevant dmub regions
 * using the parameters given (if any).
 *
 * Return:
 *   DMUB_STATUS_OK - success
 *   DMUB_STATUS_INVALID - unspecified error
 */
enum dmub_status
dmub_srv_calc_region_info(struct dmub_srv *dmub,
			  const struct dmub_srv_region_params *params,
			  struct dmub_srv_region_info *out);

/**
 * dmub_srv_calc_region_info() - retreives fb info from the dmub service
 * @dmub: the dmub service
 * @params: parameters used to calculate fb locations
 * @info_out: the output fb info from dmub
 *
 * Calculates the base and top address for all relevant dmub regions
 * using the parameters given (if any).
 *
 * Return:
 *   DMUB_STATUS_OK - success
 *   DMUB_STATUS_INVALID - unspecified error
 */
enum dmub_status dmub_srv_calc_mem_info(struct dmub_srv *dmub,
				       const struct dmub_srv_memory_params *params,
				       struct dmub_srv_fb_info *out);

/**
 * dmub_srv_has_hw_support() - returns hw support state for dmcub
 * @dmub: the dmub service
 * @is_supported: hw support state
 *
 * Queries the hardware for DMCUB support and returns the result.
 *
 * Can be called before dmub_srv_hw_init().
 *
 * Return:
 *   DMUB_STATUS_OK - success
 *   DMUB_STATUS_INVALID - unspecified error
 */
enum dmub_status dmub_srv_has_hw_support(struct dmub_srv *dmub,
					 bool *is_supported);

/**
 * dmub_srv_is_hw_init() - returns hardware init state
 *
 * Return:
 *   DMUB_STATUS_OK - success
 *   DMUB_STATUS_INVALID - unspecified error
 */
enum dmub_status dmub_srv_is_hw_init(struct dmub_srv *dmub, bool *is_hw_init);

/**
 * dmub_srv_hw_init() - initializes the underlying DMUB hardware
 * @dmub: the dmub service
 * @params: params for hardware initialization
 *
 * Resets the DMUB hardware and performs backdoor loading of the
 * required cache regions based on the input framebuffer regions.
 *
 * Return:
 *   DMUB_STATUS_OK - success
 *   DMUB_STATUS_NO_CTX - dmcub context not initialized
 *   DMUB_STATUS_INVALID - unspecified error
 */
enum dmub_status dmub_srv_hw_init(struct dmub_srv *dmub,
				  const struct dmub_srv_hw_params *params);

/**
 * dmub_srv_hw_reset() - puts the DMUB hardware in reset state if initialized
 * @dmub: the dmub service
 *
 * Before destroying the DMUB service or releasing the backing framebuffer
 * memory we'll need to put the DMCUB into reset first.
 *
 * A subsequent call to dmub_srv_hw_init() will re-enable the DMCUB.
 *
 * Return:
 *   DMUB_STATUS_OK - success
 *   DMUB_STATUS_INVALID - unspecified error
 */
enum dmub_status dmub_srv_hw_reset(struct dmub_srv *dmub);

/**
 * dmub_srv_fb_cmd_queue() - queues a command to the DMUB
 * @dmub: the dmub service
 * @cmd: the command to queue
 *
 * Queues a command to the DMUB service but does not begin execution
 * immediately.
 *
 * Return:
 *   DMUB_STATUS_OK - success
 *   DMUB_STATUS_QUEUE_FULL - no remaining room in queue
 *   DMUB_STATUS_INVALID - unspecified error
 */
enum dmub_status dmub_srv_fb_cmd_queue(struct dmub_srv *dmub,
				    const union dmub_rb_cmd *cmd);

/**
 * dmub_srv_fb_cmd_execute() - Executes a queued sequence to the dmub
 * @dmub: the dmub service
 *
 * Begins execution of queued commands on the dmub.
 *
 * Return:
 *   DMUB_STATUS_OK - success
 *   DMUB_STATUS_INVALID - unspecified error
 */
enum dmub_status dmub_srv_fb_cmd_execute(struct dmub_srv *dmub);

/**
 * dmub_srv_wait_for_hw_pwr_up() - Waits for firmware hardware power up is completed
 * @dmub: the dmub service
 * @timeout_us: the maximum number of microseconds to wait
 *
 * Waits until firmware hardware is powered up. The maximum
 * wait time is given in microseconds to prevent spinning forever.
 *
 * Return:
 *   DMUB_STATUS_OK - success
 *   DMUB_STATUS_TIMEOUT - timed out
 *   DMUB_STATUS_INVALID - unspecified error
 */
enum dmub_status dmub_srv_wait_for_hw_pwr_up(struct dmub_srv *dmub,
					     uint32_t timeout_us);

bool dmub_srv_is_hw_pwr_up(struct dmub_srv *dmub);

/**
 * dmub_srv_wait_for_auto_load() - Waits for firmware auto load to complete
 * @dmub: the dmub service
 * @timeout_us: the maximum number of microseconds to wait
 *
 * Waits until firmware has been autoloaded by the DMCUB. The maximum
 * wait time is given in microseconds to prevent spinning forever.
 *
 * On ASICs without firmware autoload support this function will return
 * immediately.
 *
 * Return:
 *   DMUB_STATUS_OK - success
 *   DMUB_STATUS_TIMEOUT - wait for phy init timed out
 *   DMUB_STATUS_INVALID - unspecified error
 */
enum dmub_status dmub_srv_wait_for_auto_load(struct dmub_srv *dmub,
					     uint32_t timeout_us);

/**
 * dmub_srv_wait_for_phy_init() - Waits for DMUB PHY init to complete
 * @dmub: the dmub service
 * @timeout_us: the maximum number of microseconds to wait
 *
 * Waits until the PHY has been initialized by the DMUB. The maximum
 * wait time is given in microseconds to prevent spinning forever.
 *
 * On ASICs without PHY init support this function will return
 * immediately.
 *
 * Return:
 *   DMUB_STATUS_OK - success
 *   DMUB_STATUS_TIMEOUT - wait for phy init timed out
 *   DMUB_STATUS_INVALID - unspecified error
 */
enum dmub_status dmub_srv_wait_for_phy_init(struct dmub_srv *dmub,
					    uint32_t timeout_us);

/**
 * dmub_srv_wait_for_pending() - Re-entrant wait for messages currently pending
 * @dmub: the dmub service
 * @timeout_us: the maximum number of microseconds to wait
 *
 * Waits until the commands queued prior to this call are complete.
 * If interfaces remain busy due to additional work being submitted
 * concurrently, this function will not continue to wait.
 *
 * Return:
 *   DMUB_STATUS_OK - success
 *   DMUB_STATUS_TIMEOUT - wait for buffer to flush timed out
 *   DMUB_STATUS_INVALID - unspecified error
 */
enum dmub_status dmub_srv_wait_for_pending(struct dmub_srv *dmub,
					uint32_t timeout_us);

/**
 * dmub_srv_wait_for_idle() - Waits for the DMUB to be idle
 * @dmub: the dmub service
 * @timeout_us: the maximum number of microseconds to wait
 *
 * Waits until the DMUB buffer is empty and all commands have
 * finished processing. The maximum wait time is given in
 * microseconds to prevent spinning forever.
 *
 * Return:
 *   DMUB_STATUS_OK - success
 *   DMUB_STATUS_TIMEOUT - wait for buffer to flush timed out
 *   DMUB_STATUS_INVALID - unspecified error
 */
enum dmub_status dmub_srv_wait_for_idle(struct dmub_srv *dmub,
					uint32_t timeout_us);

/**
 * dmub_srv_send_gpint_command() - Sends a GPINT based command.
 * @dmub: the dmub service
 * @command_code: the command code to send
 * @param: the command parameter to send
 * @timeout_us: the maximum number of microseconds to wait
 *
 * Sends a command via the general purpose interrupt (GPINT).
 * Waits for the number of microseconds specified by timeout_us
 * for the command ACK before returning.
 *
 * Can be called after software initialization.
 *
 * Return:
 *   DMUB_STATUS_OK - success
 *   DMUB_STATUS_TIMEOUT - wait for ACK timed out
 *   DMUB_STATUS_INVALID - unspecified error
 */
enum dmub_status
dmub_srv_send_gpint_command(struct dmub_srv *dmub,
			    enum dmub_gpint_command command_code,
			    uint16_t param, uint32_t timeout_us);

/**
 * dmub_srv_get_gpint_response() - Queries the GPINT response.
 * @dmub: the dmub service
 * @response: the response for the last GPINT
 *
 * Returns the response code for the last GPINT interrupt.
 *
 * Can be called after software initialization.
 *
 * Return:
 *   DMUB_STATUS_OK - success
 *   DMUB_STATUS_INVALID - unspecified error
 */
enum dmub_status dmub_srv_get_gpint_response(struct dmub_srv *dmub,
					     uint32_t *response);

/**
 * dmub_srv_get_gpint_dataout() - Queries the GPINT DATAOUT.
 * @dmub: the dmub service
 * @dataout: the data for the GPINT DATAOUT
 *
 * Returns the response code for the last GPINT DATAOUT interrupt.
 *
 * Can be called after software initialization.
 *
 * Return:
 *   DMUB_STATUS_OK - success
 *   DMUB_STATUS_INVALID - unspecified error
 */
enum dmub_status dmub_srv_get_gpint_dataout(struct dmub_srv *dmub,
					     uint32_t *dataout);

/**
 * dmub_flush_buffer_mem() - Read back entire frame buffer region.
 * This ensures that the write from x86 has been flushed and will not
 * hang the DMCUB.
 * @fb: frame buffer to flush
 *
 * Can be called after software initialization.
 */
void dmub_flush_buffer_mem(const struct dmub_fb *fb);

/**
 * dmub_srv_get_fw_boot_status() - Returns the DMUB boot status bits.
 *
 * @dmub: the dmub service
 * @status: out pointer for firmware status
 *
 * Return:
 *   DMUB_STATUS_OK - success
 *   DMUB_STATUS_INVALID - unspecified error, unsupported
 */
enum dmub_status dmub_srv_get_fw_boot_status(struct dmub_srv *dmub,
					     union dmub_fw_boot_status *status);

enum dmub_status dmub_srv_get_fw_boot_option(struct dmub_srv *dmub,
					     union dmub_fw_boot_options *option);

enum dmub_status dmub_srv_set_skip_panel_power_sequence(struct dmub_srv *dmub,
					     bool skip);

bool dmub_srv_get_outbox0_msg(struct dmub_srv *dmub, struct dmcub_trace_buf_entry *entry);

bool dmub_srv_get_diagnostic_data(struct dmub_srv *dmub);

bool dmub_srv_should_detect(struct dmub_srv *dmub);

/**
 * dmub_srv_send_inbox0_cmd() - Send command to DMUB using INBOX0
 * @dmub: the dmub service
 * @data: the data to be sent in the INBOX0 command
 *
 * Send command by writing directly to INBOX0 WPTR
 *
 * Return:
 *   DMUB_STATUS_OK - success
 *   DMUB_STATUS_INVALID - hw_init false or hw function does not exist
 */
enum dmub_status dmub_srv_send_inbox0_cmd(struct dmub_srv *dmub, union dmub_inbox0_data_register data);

/**
 * dmub_srv_wait_for_inbox0_ack() - wait for DMUB to ACK INBOX0 command
 * @dmub: the dmub service
 * @timeout_us: the maximum number of microseconds to wait
 *
 * Wait for DMUB to ACK the INBOX0 message
 *
 * Return:
 *   DMUB_STATUS_OK - success
 *   DMUB_STATUS_INVALID - hw_init false or hw function does not exist
 *   DMUB_STATUS_TIMEOUT - wait for ack timed out
 */
enum dmub_status dmub_srv_wait_for_inbox0_ack(struct dmub_srv *dmub, uint32_t timeout_us);

/**
 * dmub_srv_wait_for_inbox0_ack() - clear ACK register for INBOX0
 * @dmub: the dmub service
 *
 * Clear ACK register for INBOX0
 *
 * Return:
 *   DMUB_STATUS_OK - success
 *   DMUB_STATUS_INVALID - hw_init false or hw function does not exist
 */
enum dmub_status dmub_srv_clear_inbox0_ack(struct dmub_srv *dmub);

/**
 * dmub_srv_subvp_save_surf_addr() - Save primary and meta address for subvp on each flip
 * @dmub: The dmub service
 * @addr: The surface address to be programmed on the current flip
 * @subvp_index: Index of subvp pipe, indicates which subvp pipe the address should be saved for
 *
 * Function to save the surface flip addr into scratch registers. This is to fix a race condition
 * between FW and driver reading / writing to the surface address at the same time. This is
 * required because there is no EARLIEST_IN_USE_META.
 *
 * Return:
 *   void
 */
void dmub_srv_subvp_save_surf_addr(struct dmub_srv *dmub, const struct dc_plane_address *addr, uint8_t subvp_index);

/**
 * dmub_srv_set_power_state() - Track DC power state in dmub_srv
 * @dmub: The dmub service
 * @power_state: DC power state setting
 *
 * Store DC power state in dmub_srv.  If dmub_srv is in D3, then don't send messages to DMUB
 *
 * Return:
 *   void
 */
void dmub_srv_set_power_state(struct dmub_srv *dmub, enum dmub_srv_power_state_type dmub_srv_power_state);

/**
 * dmub_srv_reg_cmd_execute() - Executes provided command to the dmub
 * @dmub: the dmub service
 * @cmd: the command packet to be executed
 *
 * Executes a single command for the dmub.
 *
 * Return:
 *   DMUB_STATUS_OK - success
 *   DMUB_STATUS_INVALID - unspecified error
 */
enum dmub_status dmub_srv_reg_cmd_execute(struct dmub_srv *dmub, union dmub_rb_cmd *cmd);


/**
 * dmub_srv_cmd_get_response() - Copies return data for command into buffer
 * @dmub: the dmub service
 * @cmd_rsp: response buffer
 *
 * Copies return data for command into buffer
 */
void dmub_srv_cmd_get_response(struct dmub_srv *dmub,
		union dmub_rb_cmd *cmd_rsp);

/**
 * dmub_srv_sync_inboxes() - Sync inbox state
 * @dmub: the dmub service
 *
 * Sync inbox state
 *
 * Return:
 *   DMUB_STATUS_OK - success
 *   DMUB_STATUS_INVALID - unspecified error
 */
enum dmub_status dmub_srv_sync_inboxes(struct dmub_srv *dmub);

/**
 * dmub_srv_wait_for_inbox_free() - Waits for space in the DMUB inbox to free up
 * @dmub: the dmub service
 * @timeout_us: the maximum number of microseconds to wait
 * @num_free_required: number of free entries required
 *
 * Waits until the DMUB buffer is freed to the specified number.
 *  The maximum wait time is given in microseconds to prevent spinning
 * forever.
 *
 * Return:
 *   DMUB_STATUS_OK - success
 *   DMUB_STATUS_TIMEOUT - wait for buffer to flush timed out
 *   DMUB_STATUS_INVALID - unspecified error
 */
enum dmub_status dmub_srv_wait_for_inbox_free(struct dmub_srv *dmub,
		uint32_t timeout_us,
		uint32_t num_free_required);

/**
 * dmub_srv_update_inbox_status() - Updates pending status for inbox & reg inbox0
 * @dmub: the dmub service
 *
 * Return:
 *   DMUB_STATUS_OK - success
 *   DMUB_STATUS_TIMEOUT - wait for buffer to flush timed out
 *   DMUB_STATUS_HW_FAILURE - issue with HW programming
 *   DMUB_STATUS_INVALID - unspecified error
 */
enum dmub_status dmub_srv_update_inbox_status(struct dmub_srv *dmub);

/**
 * dmub_srv_get_preos_info() - retrieves preos fw info
 * @dmub: the dmub service
 *
 * Return:
 *   true - preos fw info retrieved successfully
 *   false - preos fw info not retrieved successfully
 */
bool dmub_srv_get_preos_info(struct dmub_srv *dmub);

/**
 * dmub_srv_get_fw_meta_info_from_raw_fw() - Fetch firmware metadata info from raw firmware image
 * @params: parameters for fetching firmware metadata info
 * @fw_info_out: output buffer for firmware metadata info
 *
 * Return:
 *   DMUB_STATUS_OK - success
 *   DMUB_STATUS_INVALID - no FW meta info found
 */
enum dmub_status dmub_srv_get_fw_meta_info_from_raw_fw(struct dmub_srv_fw_meta_info_params *params,
						       struct dmub_fw_meta_info *fw_info_out);

#endif /* _DMUB_SRV_H_ */