drivers/gpu/drm/amd/include/cgs_common.h

/*
 * Copyright 2015 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.
 *
 *
 */
#ifndef _CGS_COMMON_H
#define _CGS_COMMON_H

/**
 * enum cgs_gpu_mem_type - GPU memory types
 */
enum cgs_gpu_mem_type {
	CGS_GPU_MEM_TYPE__VISIBLE_FB,
	CGS_GPU_MEM_TYPE__INVISIBLE_FB,
	CGS_GPU_MEM_TYPE__VISIBLE_CONTIG_FB,
	CGS_GPU_MEM_TYPE__INVISIBLE_CONTIG_FB,
	CGS_GPU_MEM_TYPE__GART_CACHEABLE,
	CGS_GPU_MEM_TYPE__GART_WRITECOMBINE
};

/**
 * enum cgs_ind_reg - Indirect register spaces
 */
enum cgs_ind_reg {
	CGS_IND_REG__MMIO,
	CGS_IND_REG__PCIE,
	CGS_IND_REG__SMC,
	CGS_IND_REG__UVD_CTX,
	CGS_IND_REG__DIDT,
	CGS_IND_REG__AUDIO_ENDPT
};

/**
 * enum cgs_clock - Clocks controlled by the SMU
 */
enum cgs_clock {
	CGS_CLOCK__SCLK,
	CGS_CLOCK__MCLK,
	CGS_CLOCK__VCLK,
	CGS_CLOCK__DCLK,
	CGS_CLOCK__ECLK,
	CGS_CLOCK__ACLK,
	CGS_CLOCK__ICLK,
	/* ... */
};

/**
 * enum cgs_engine - Engines that can be statically power-gated
 */
enum cgs_engine {
	CGS_ENGINE__UVD,
	CGS_ENGINE__VCE,
	CGS_ENGINE__VP8,
	CGS_ENGINE__ACP_DMA,
	CGS_ENGINE__ACP_DSP0,
	CGS_ENGINE__ACP_DSP1,
	CGS_ENGINE__ISP,
	/* ... */
};

/**
 * enum cgs_voltage_planes - Voltage planes for external camera HW
 */
enum cgs_voltage_planes {
	CGS_VOLTAGE_PLANE__SENSOR0,
	CGS_VOLTAGE_PLANE__SENSOR1,
	/* ... */
};

/**
 * struct cgs_clock_limits - Clock limits
 *
 * Clocks are specified in 10KHz units.
 */
struct cgs_clock_limits {
	unsigned min;		/**< Minimum supported frequency */
	unsigned max;		/**< Maxumim supported frequency */
	unsigned sustainable;	/**< Thermally sustainable frequency */
};

typedef unsigned long cgs_handle_t;

/**
 * cgs_gpu_mem_info() - Return information about memory heaps
 * @cgs_device: opaque device handle
 * @type:	memory type
 * @mc_start:	Start MC address of the heap (output)
 * @mc_size:	MC address space size (output)
 * @mem_size:	maximum amount of memory available for allocation (output)
 *
 * This function returns information about memory heaps. The type
 * parameter is used to select the memory heap. The mc_start and
 * mc_size for GART heaps may be bigger than the memory available for
 * allocation.
 *
 * mc_start and mc_size are undefined for non-contiguous FB memory
 * types, since buffers allocated with these types may or may not be
 * GART mapped.
 *
 * Return:  0 on success, -errno otherwise
 */
typedef int (*cgs_gpu_mem_info_t)(void *cgs_device, enum cgs_gpu_mem_type type,
				  uint64_t *mc_start, uint64_t *mc_size,
				  uint64_t *mem_size);

/**
 * cgs_gmap_kmem() - map kernel memory to GART aperture
 * @cgs_device:	opaque device handle
 * @kmem:	pointer to kernel memory
 * @size:	size to map
 * @min_offset: minimum offset from start of GART aperture
 * @max_offset: maximum offset from start of GART aperture
 * @kmem_handle: kernel memory handle (output)
 * @mcaddr:	MC address (output)
 *
 * Return:  0 on success, -errno otherwise
 */
typedef int (*cgs_gmap_kmem_t)(void *cgs_device, void *kmem, uint64_t size,
			       uint64_t min_offset, uint64_t max_offset,
			       cgs_handle_t *kmem_handle, uint64_t *mcaddr);

/**
 * cgs_gunmap_kmem() - unmap kernel memory
 * @cgs_device:	opaque device handle
 * @kmem_handle: kernel memory handle returned by gmap_kmem
 *
 * Return:  0 on success, -errno otherwise
 */
typedef int (*cgs_gunmap_kmem_t)(void *cgs_device, cgs_handle_t kmem_handle);

/**
 * cgs_alloc_gpu_mem() - Allocate GPU memory
 * @cgs_device:	opaque device handle
 * @type:	memory type
 * @size:	size in bytes
 * @align:	alignment in bytes
 * @min_offset: minimum offset from start of heap
 * @max_offset: maximum offset from start of heap
 * @handle:	memory handle (output)
 *
 * The memory types CGS_GPU_MEM_TYPE_*_CONTIG_FB force contiguous
 * memory allocation. This guarantees that the MC address returned by
 * cgs_gmap_gpu_mem is not mapped through the GART. The non-contiguous
 * FB memory types may be GART mapped depending on memory
 * fragmentation and memory allocator policies.
 *
 * If min/max_offset are non-0, the allocation will be forced to
 * reside between these offsets in its respective memory heap. The
 * base address that the offset relates to, depends on the memory
 * type.
 *
 * - CGS_GPU_MEM_TYPE__*_CONTIG_FB: FB MC base address
 * - CGS_GPU_MEM_TYPE__GART_*:	    GART aperture base address
 * - others:			    undefined, don't use with max_offset
 *
 * Return:  0 on success, -errno otherwise
 */
typedef int (*cgs_alloc_gpu_mem_t)(void *cgs_device, enum cgs_gpu_mem_type type,
				   uint64_t size, uint64_t align,
				   uint64_t min_offset, uint64_t max_offset,
				   cgs_handle_t *handle);

/**
 * cgs_free_gpu_mem() - Free GPU memory
 * @cgs_device:	opaque device handle
 * @handle:	memory handle returned by alloc or import
 *
 * Return:  0 on success, -errno otherwise
 */
typedef int (*cgs_free_gpu_mem_t)(void *cgs_device, cgs_handle_t handle);

/**
 * cgs_gmap_gpu_mem() - GPU-map GPU memory
 * @cgs_device:	opaque device handle
 * @handle:	memory handle returned by alloc or import
 * @mcaddr:	MC address (output)
 *
 * Ensures that a buffer is GPU accessible and returns its MC address.
 *
 * Return:  0 on success, -errno otherwise
 */
typedef int (*cgs_gmap_gpu_mem_t)(void *cgs_device, cgs_handle_t handle,
				  uint64_t *mcaddr);

/**
 * cgs_gunmap_gpu_mem() - GPU-unmap GPU memory
 * @cgs_device:	opaque device handle
 * @handle:	memory handle returned by alloc or import
 *
 * Allows the buffer to be migrated while it's not used by the GPU.
 *
 * Return:  0 on success, -errno otherwise
 */
typedef int (*cgs_gunmap_gpu_mem_t)(void *cgs_device, cgs_handle_t handle);

/**
 * cgs_kmap_gpu_mem() - Kernel-map GPU memory
 *
 * @cgs_device:	opaque device handle
 * @handle:	memory handle returned by alloc or import
 * @map:	Kernel virtual address the memory was mapped to (output)
 *
 * Return:  0 on success, -errno otherwise
 */
typedef int (*cgs_kmap_gpu_mem_t)(void *cgs_device, cgs_handle_t handle,
				  void **map);

/**
 * cgs_kunmap_gpu_mem() - Kernel-unmap GPU memory
 * @cgs_device:	opaque device handle
 * @handle:	memory handle returned by alloc or import
 *
 * Return:  0 on success, -errno otherwise
 */
typedef int (*cgs_kunmap_gpu_mem_t)(void *cgs_device, cgs_handle_t handle);

/**
 * cgs_read_register() - Read an MMIO register
 * @cgs_device:	opaque device handle
 * @offset:	register offset
 *
 * Return:  register value
 */
typedef uint32_t (*cgs_read_register_t)(void *cgs_device, unsigned offset);

/**
 * cgs_write_register() - Write an MMIO register
 * @cgs_device:	opaque device handle
 * @offset:	register offset
 * @value:	register value
 */
typedef void (*cgs_write_register_t)(void *cgs_device, unsigned offset,
				     uint32_t value);

/**
 * cgs_read_ind_register() - Read an indirect register
 * @cgs_device:	opaque device handle
 * @offset:	register offset
 *
 * Return:  register value
 */
typedef uint32_t (*cgs_read_ind_register_t)(void *cgs_device, enum cgs_ind_reg space,
					    unsigned index);

/**
 * cgs_write_ind_register() - Write an indirect register
 * @cgs_device:	opaque device handle
 * @offset:	register offset
 * @value:	register value
 */
typedef void (*cgs_write_ind_register_t)(void *cgs_device, enum cgs_ind_reg space,
					 unsigned index, uint32_t value);

/**
 * cgs_read_pci_config_byte() - Read byte from PCI configuration space
 * @cgs_device:	opaque device handle
 * @addr:	address
 *
 * Return:  Value read
 */
typedef uint8_t (*cgs_read_pci_config_byte_t)(void *cgs_device, unsigned addr);

/**
 * cgs_read_pci_config_word() - Read word from PCI configuration space
 * @cgs_device:	opaque device handle
 * @addr:	address, must be word-aligned
 *
 * Return:  Value read
 */
typedef uint16_t (*cgs_read_pci_config_word_t)(void *cgs_device, unsigned addr);

/**
 * cgs_read_pci_config_dword() - Read dword from PCI configuration space
 * @cgs_device:	opaque device handle
 * @addr:	address, must be dword-aligned
 *
 * Return:  Value read
 */
typedef uint32_t (*cgs_read_pci_config_dword_t)(void *cgs_device,
						unsigned addr);

/**
 * cgs_write_pci_config_byte() - Write byte to PCI configuration space
 * @cgs_device:	opaque device handle
 * @addr:	address
 * @value:	value to write
 */
typedef void (*cgs_write_pci_config_byte_t)(void *cgs_device, unsigned addr,
					    uint8_t value);

/**
 * cgs_write_pci_config_word() - Write byte to PCI configuration space
 * @cgs_device:	opaque device handle
 * @addr:	address, must be word-aligned
 * @value:	value to write
 */
typedef void (*cgs_write_pci_config_word_t)(void *cgs_device, unsigned addr,
					    uint16_t value);

/**
 * cgs_write_pci_config_dword() - Write byte to PCI configuration space
 * @cgs_device:	opaque device handle
 * @addr:	address, must be dword-aligned
 * @value:	value to write
 */
typedef void (*cgs_write_pci_config_dword_t)(void *cgs_device, unsigned addr,
					     uint32_t value);

/**
 * cgs_atom_get_data_table() - Get a pointer to an ATOM BIOS data table
 * @cgs_device:	opaque device handle
 * @table:	data table index
 * @size:	size of the table (output, may be NULL)
 * @frev:	table format revision (output, may be NULL)
 * @crev:	table content revision (output, may be NULL)
 *
 * Return: Pointer to start of the table, or NULL on failure
 */
typedef const void *(*cgs_atom_get_data_table_t)(
	void *cgs_device, unsigned table,
	uint16_t *size, uint8_t *frev, uint8_t *crev);

/**
 * cgs_atom_get_cmd_table_revs() - Get ATOM BIOS command table revisions
 * @cgs_device:	opaque device handle
 * @table:	data table index
 * @frev:	table format revision (output, may be NULL)
 * @crev:	table content revision (output, may be NULL)
 *
 * Return: 0 on success, -errno otherwise
 */
typedef int (*cgs_atom_get_cmd_table_revs_t)(void *cgs_device, unsigned table,
					     uint8_t *frev, uint8_t *crev);

/**
 * cgs_atom_exec_cmd_table() - Execute an ATOM BIOS command table
 * @cgs_device: opaque device handle
 * @table:	command table index
 * @args:	arguments
 *
 * Return: 0 on success, -errno otherwise
 */
typedef int (*cgs_atom_exec_cmd_table_t)(void *cgs_device,
					 unsigned table, void *args);

/**
 * cgs_create_pm_request() - Create a power management request
 * @cgs_device:	opaque device handle
 * @request:	handle of created PM request (output)
 *
 * Return:  0 on success, -errno otherwise
 */
typedef int (*cgs_create_pm_request_t)(void *cgs_device, cgs_handle_t *request);

/**
 * cgs_destroy_pm_request() - Destroy a power management request
 * @cgs_device:	opaque device handle
 * @request:	handle of created PM request
 *
 * Return:  0 on success, -errno otherwise
 */
typedef int (*cgs_destroy_pm_request_t)(void *cgs_device, cgs_handle_t request);

/**
 * cgs_set_pm_request() - Activate or deactiveate a PM request
 * @cgs_device:	opaque device handle
 * @request:	PM request handle
 * @active:	0 = deactivate, non-0 = activate
 *
 * While a PM request is active, its minimum clock requests are taken
 * into account as the requested engines are powered up. When the
 * request is inactive, the engines may be powered down and clocks may
 * be lower, depending on other PM requests by other driver
 * components.
 *
 * Return:  0 on success, -errno otherwise
 */
typedef int (*cgs_set_pm_request_t)(void *cgs_device, cgs_handle_t request,
				    int active);

/**
 * cgs_pm_request_clock() - Request a minimum frequency for a specific clock
 * @cgs_device:	opaque device handle
 * @request:	PM request handle
 * @clock:	which clock?
 * @freq:	requested min. frequency in 10KHz units (0 to clear request)
 *
 * Return:  0 on success, -errno otherwise
 */
typedef int (*cgs_pm_request_clock_t)(void *cgs_device, cgs_handle_t request,
				      enum cgs_clock clock, unsigned freq);

/**
 * cgs_pm_request_engine() - Request an engine to be powered up
 * @cgs_device:	opaque device handle
 * @request:	PM request handle
 * @engine:	which engine?
 * @powered:	0 = powered down, non-0 = powered up
 *
 * Return:  0 on success, -errno otherwise
 */
typedef int (*cgs_pm_request_engine_t)(void *cgs_device, cgs_handle_t request,
				       enum cgs_engine engine, int powered);

/**
 * cgs_pm_query_clock_limits() - Query clock frequency limits
 * @cgs_device:	opaque device handle
 * @clock:	which clock?
 * @limits:	clock limits
 *
 * Return:  0 on success, -errno otherwise
 */
typedef int (*cgs_pm_query_clock_limits_t)(void *cgs_device,
					   enum cgs_clock clock,
					   struct cgs_clock_limits *limits);

/**
 * cgs_set_camera_voltages() - Apply specific voltages to PMIC voltage planes
 * @cgs_device:	opaque device handle
 * @mask:	bitmask of voltages to change (1<<CGS_VOLTAGE_PLANE__xyz|...)
 * @voltages:	pointer to array of voltage values in 1mV units
 *
 * Return: 0 on success, -errno otherwise
 */
typedef int (*cgs_set_camera_voltages_t)(void *cgs_device, uint32_t mask,
					 const uint32_t *voltages);

struct cgs_ops {
	/* memory management calls (similar to KFD interface) */
	cgs_gpu_mem_info_t gpu_mem_info;
	cgs_gmap_kmem_t gmap_kmem;
	cgs_gunmap_kmem_t gunmap_kmem;
	cgs_alloc_gpu_mem_t alloc_gpu_mem;
	cgs_free_gpu_mem_t free_gpu_mem;
	cgs_gmap_gpu_mem_t gmap_gpu_mem;
	cgs_gunmap_gpu_mem_t gunmap_gpu_mem;
	cgs_kmap_gpu_mem_t kmap_gpu_mem;
	cgs_kunmap_gpu_mem_t kunmap_gpu_mem;
	/* MMIO access */
	cgs_read_register_t read_register;
	cgs_write_register_t write_register;
	cgs_read_ind_register_t read_ind_register;
	cgs_write_ind_register_t write_ind_register;
	/* PCI configuration space access */
	cgs_read_pci_config_byte_t read_pci_config_byte;
	cgs_read_pci_config_word_t read_pci_config_word;
	cgs_read_pci_config_dword_t read_pci_config_dword;
	cgs_write_pci_config_byte_t write_pci_config_byte;
	cgs_write_pci_config_word_t write_pci_config_word;
	cgs_write_pci_config_dword_t write_pci_config_dword;
	/* ATOM BIOS */
	cgs_atom_get_data_table_t atom_get_data_table;
	cgs_atom_get_cmd_table_revs_t atom_get_cmd_table_revs;
	cgs_atom_exec_cmd_table_t atom_exec_cmd_table;
	/* Power management */
	cgs_create_pm_request_t create_pm_request;
	cgs_destroy_pm_request_t destroy_pm_request;
	cgs_set_pm_request_t set_pm_request;
	cgs_pm_request_clock_t pm_request_clock;
	cgs_pm_request_engine_t pm_request_engine;
	cgs_pm_query_clock_limits_t pm_query_clock_limits;
	cgs_set_camera_voltages_t set_camera_voltages;
	/* ACPI (TODO) */
};

struct cgs_os_ops; /* To be define in OS-specific CGS header */

struct cgs_device
{
	const struct cgs_ops *ops;
	const struct cgs_os_ops *os_ops;
	/* to be embedded at the start of driver private structure */
};

/* Convenience macros that make CGS indirect function calls look like
 * normal function calls */
#define CGS_CALL(func,dev,...) \
	(((struct cgs_device *)dev)->ops->func(dev, ##__VA_ARGS__))
#define CGS_OS_CALL(func,dev,...) \
	(((struct cgs_device *)dev)->os_ops->func(dev, ##__VA_ARGS__))

#define cgs_gpu_mem_info(dev,type,mc_start,mc_size,mem_size)		\
	CGS_CALL(gpu_mem_info,dev,type,mc_start,mc_size,mem_size)
#define cgs_gmap_kmem(dev,kmem,size,min_off,max_off,kmem_handle,mcaddr)	\
	CGS_CALL(gmap_kmem,dev,kmem,size,min_off,max_off,kmem_handle,mcaddr)
#define cgs_gummap_kmem(dev,kmem_handle)	\
	CGS_CALL(gunmap_kmem,dev,keme_handle)
#define cgs_alloc_gpu_mem(dev,type,size,align,min_off,max_off,handle)	\
	CGS_CALL(alloc_gpu_mem,dev,type,size,align,min_off,max_off,handle)
#define cgs_free_gpu_mem(dev,handle)		\
	CGS_CALL(free_gpu_mem,dev,handle)
#define cgs_gmap_gpu_mem(dev,handle,mcaddr)	\
	CGS_CALL(gmap_gpu_mem,dev,handle,mcaddr)
#define cgs_gummap_gpu_mem(dev,handle)		\
	CGS_CALL(gunmap_gpu_mem,dev,handle)
#define cgs_kmap_gpu_mem(dev,handle,map)	\
	CGS_CALL(kmap_gpu_mem,dev,handle,map)
#define cgs_kunmap_gpu_mem(dev,handle)		\
	CGS_CALL(kunmap_gpu_mem,dev,handle)

#define cgs_read_register(dev,offset)		\
	CGS_CALL(read_register,dev,offset)
#define cgs_write_register(dev,offset,value)		\
	CGS_CALL(write_register,dev,offset,value)
#define cgs_read_ind_register(dev,space,index)		\
	CGS_CALL(read_ind_register,dev,space,index)
#define cgs_write_ind_register(dev,space,index,value)		\
	CGS_CALL(write_ind_register,dev,space,index,value)

#define cgs_read_pci_config_byte(dev,addr)	\
	CGS_CALL(read_pci_config_byte,dev,addr)
#define cgs_read_pci_config_word(dev,addr)	\
	CGS_CALL(read_pci_config_word,dev,addr)
#define cgs_read_pci_config_dword(dev,addr)		\
	CGS_CALL(read_pci_config_dword,dev,addr)
#define cgs_write_pci_config_byte(dev,addr,value)	\
	CGS_CALL(write_pci_config_byte,dev,addr,value)
#define cgs_write_pci_config_word(dev,addr,value)	\
	CGS_CALL(write_pci_config_word,dev,addr,value)
#define cgs_write_pci_config_dword(dev,addr,value)	\
	CGS_CALL(write_pci_config_dword,dev,addr,value)

#define cgs_atom_get_data_table(dev,table,size,frev,crev)	\
	CGS_CALL(atom_get_data_table,dev,table,size,frev,crev)
#define cgs_atom_get_cmd_table_revs(dev,table,frev,crev)	\
	CGS_CALL(atom_get_cmd_table_revs,dev,table,frev,crev)
#define cgs_atom_exec_cmd_table(dev,table,args)		\
	CGS_CALL(atom_exec_cmd_table,dev,table,args)

#define cgs_create_pm_request(dev,request)	\
	CGS_CALL(create_pm_request,dev,request)
#define cgs_destroy_pm_request(dev,request)		\
	CGS_CALL(destroy_pm_request,dev,request)
#define cgs_set_pm_request(dev,request,active)		\
	CGS_CALL(set_pm_request,dev,request,active)
#define cgs_pm_request_clock(dev,request,clock,freq)		\
	CGS_CALL(pm_request_clock,dev,request,clock,freq)
#define cgs_pm_request_engine(dev,request,engine,powered)	\
	CGS_CALL(pm_request_engine,dev,request,engine,powered)
#define cgs_pm_query_clock_limits(dev,clock,limits)		\
	CGS_CALL(pm_query_clock_limits,dev,clock,limits)
#define cgs_set_camera_voltages(dev,mask,voltages)	\
	CGS_CALL(set_camera_voltages,dev,mask,voltages)

#endif /* _CGS_COMMON_H */