src/dev/hsa/kfd_ioctl.h

/*
 * Copyright 2014 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 KFD_IOCTL_H_INCLUDED
#define KFD_IOCTL_H_INCLUDED

#include <cstdint>
#include <linux/ioctl.h>
#include <linux/types.h>

namespace gem5
{

/*
 * - 1.1 - initial version
 * - 1.3 - Add SMI events support
 */
#define KFD_IOCTL_MAJOR_VERSION 1
#define KFD_IOCTL_MINOR_VERSION 3

struct kfd_ioctl_get_version_args
{
	uint32_t major_version;	/* from KFD */
	uint32_t minor_version;	/* from KFD */
};

/* For kfd_ioctl_create_queue_args.queue_type. */
#define KFD_IOC_QUEUE_TYPE_COMPUTE	0
#define KFD_IOC_QUEUE_TYPE_SDMA		1
#define KFD_IOC_QUEUE_TYPE_COMPUTE_AQL	2
#define KFD_IOC_QUEUE_TYPE_SDMA_XGMI    3

#define KFD_MAX_QUEUE_PERCENTAGE	100
#define KFD_MAX_QUEUE_PRIORITY		15

struct kfd_ioctl_create_queue_args
{
	uint64_t ring_base_address;	/* to KFD */
	uint64_t write_pointer_address;	/* from KFD */
	uint64_t read_pointer_address;	/* from KFD */
	uint64_t doorbell_offset;	/* from KFD */

	uint32_t ring_size;		/* to KFD */
	uint32_t gpu_id;		/* to KFD */
	uint32_t queue_type;		/* to KFD */
	uint32_t queue_percentage;	/* to KFD */
	uint32_t queue_priority;	/* to KFD */
	uint32_t queue_id;		/* from KFD */

	uint64_t eop_buffer_address;	/* to KFD */
	uint64_t eop_buffer_size;	/* to KFD */
	uint64_t ctx_save_restore_address; /* to KFD */
	uint32_t ctx_save_restore_size;	/* to KFD */
	uint32_t ctl_stack_size;	/* to KFD */
};

struct kfd_ioctl_destroy_queue_args
{
	uint32_t queue_id;		/* to KFD */
	uint32_t pad;
};

struct kfd_ioctl_update_queue_args
{
	uint64_t ring_base_address;	/* to KFD */

	uint32_t queue_id;		/* to KFD */
	uint32_t ring_size;		/* to KFD */
	uint32_t queue_percentage;	/* to KFD */
	uint32_t queue_priority;	/* to KFD */
};

struct kfd_ioctl_set_cu_mask_args
{
	uint32_t queue_id;		/* to KFD */
	uint32_t num_cu_mask;		/* to KFD */
	uint64_t cu_mask_ptr;		/* to KFD */
};

struct kfd_ioctl_get_queue_wave_state_args
{
        uint64_t ctl_stack_address;     /* to KFD */
        uint32_t ctl_stack_used_size;   /* from KFD */
        uint32_t save_area_used_size;   /* from KFD */
        uint32_t queue_id;              /* to KFD */
        uint32_t pad;
};

/* For kfd_ioctl_set_memory_policy_args.default_policy and alternate_policy */
#define KFD_IOC_CACHE_POLICY_COHERENT 0
#define KFD_IOC_CACHE_POLICY_NONCOHERENT 1

struct kfd_ioctl_set_memory_policy_args
{
	uint64_t alternate_aperture_base;	/* to KFD */
	uint64_t alternate_aperture_size;	/* to KFD */

	uint32_t gpu_id;			/* to KFD */
	uint32_t default_policy;		/* to KFD */
	uint32_t alternate_policy;		/* to KFD */
	uint32_t pad;
};

/*
 * All counters are monotonic. They are used for profiling of compute jobs.
 * The profiling is done by userspace.
 *
 * In case of GPU reset, the counter should not be affected.
 */

struct kfd_ioctl_get_clock_counters_args
{
	uint64_t gpu_clock_counter;	/* from KFD */
	uint64_t cpu_clock_counter;	/* from KFD */
	uint64_t system_clock_counter;	/* from KFD */
	uint64_t system_clock_freq;	/* from KFD */

	uint32_t gpu_id;		/* to KFD */
	uint32_t pad;
};

struct kfd_process_device_apertures
{
	uint64_t lds_base;		/* from KFD */
	uint64_t lds_limit;		/* from KFD */
	uint64_t scratch_base;		/* from KFD */
	uint64_t scratch_limit;		/* from KFD */
	uint64_t gpuvm_base;		/* from KFD */
	uint64_t gpuvm_limit;		/* from KFD */
	uint32_t gpu_id;		/* from KFD */
	uint32_t pad;
};

/*
 * AMDKFD_IOC_GET_PROCESS_APERTURES is deprecated. Use
 * AMDKFD_IOC_GET_PROCESS_APERTURES_NEW instead, which supports an
 * unlimited number of GPUs.
 */
#define NUM_OF_SUPPORTED_GPUS 7
struct kfd_ioctl_get_process_apertures_args
{
	struct kfd_process_device_apertures
			process_apertures[NUM_OF_SUPPORTED_GPUS];/* from KFD */

	/* from KFD, should be in the range [1 - NUM_OF_SUPPORTED_GPUS] */
	uint32_t num_of_nodes;
	uint32_t pad;
};

struct kfd_ioctl_get_process_apertures_new_args
{
	/* User allocated. Pointer to struct kfd_process_device_apertures
	 * filled in by Kernel
	 */
	uint64_t kfd_process_device_apertures_ptr;
	/* to KFD - indicates amount of memory present in
	 *  kfd_process_device_apertures_ptr
	 * from KFD - Number of entries filled by KFD.
	 */
	uint32_t num_of_nodes;
	uint32_t pad;
};

#define MAX_ALLOWED_NUM_POINTS    100
#define MAX_ALLOWED_AW_BUFF_SIZE 4096
#define MAX_ALLOWED_WAC_BUFF_SIZE  128

struct kfd_ioctl_dbg_register_args
{
	uint32_t gpu_id;		/* to KFD */
	uint32_t pad;
};

struct kfd_ioctl_dbg_unregister_args
{
	uint32_t gpu_id;		/* to KFD */
	uint32_t pad;
};

struct kfd_ioctl_dbg_address_watch_args
{
	uint64_t content_ptr;		/* a pointer to the actual content */
	uint32_t gpu_id;		/* to KFD */
	uint32_t buf_size_in_bytes;	/*including gpu_id and buf_size */
};

struct kfd_ioctl_dbg_wave_control_args
{
	uint64_t content_ptr;		/* a pointer to the actual content */
	uint32_t gpu_id;		/* to KFD */
	uint32_t buf_size_in_bytes;	/*including gpu_id and buf_size */
};

/* Matching HSA_EVENTTYPE */
#define KFD_IOC_EVENT_SIGNAL		0
#define KFD_IOC_EVENT_NODECHANGE	1
#define KFD_IOC_EVENT_DEVICESTATECHANGE	2
#define KFD_IOC_EVENT_HW_EXCEPTION	3
#define KFD_IOC_EVENT_SYSTEM_EVENT	4
#define KFD_IOC_EVENT_DEBUG_EVENT	5
#define KFD_IOC_EVENT_PROFILE_EVENT	6
#define KFD_IOC_EVENT_QUEUE_EVENT	7
#define KFD_IOC_EVENT_MEMORY		8

#define KFD_IOC_WAIT_RESULT_COMPLETE	0
#define KFD_IOC_WAIT_RESULT_TIMEOUT	1
#define KFD_IOC_WAIT_RESULT_FAIL	2

#define KFD_SIGNAL_EVENT_LIMIT          4096

/* For kfd_event_data.hw_exception_data.reset_type. */
#define KFD_HW_EXCEPTION_WHOLE_GPU_RESET        0
#define KFD_HW_EXCEPTION_PER_ENGINE_RESET       1

/* For kfd_event_data.hw_exception_data.reset_cause. */
#define KFD_HW_EXCEPTION_GPU_HANG       0
#define KFD_HW_EXCEPTION_ECC            1

/* For kfd_hsa_memory_exception_data.ErrorType */
#define KFD_MEM_ERR_NO_RAS              0
#define KFD_MEM_ERR_SRAM_ECC            1
#define KFD_MEM_ERR_POISON_CONSUMED     2
#define KFD_MEM_ERR_GPU_HANG            3

struct kfd_ioctl_create_event_args
{
	uint64_t event_page_offset;	/* from KFD */
	uint32_t event_trigger_data;	/* from KFD - signal events only */
	uint32_t event_type;		/* to KFD */
	uint32_t auto_reset;		/* to KFD */
	uint32_t node_id;		/* to KFD - only valid for certain
							event types */
	uint32_t event_id;		/* from KFD */
	uint32_t event_slot_index;	/* from KFD */
};

struct kfd_ioctl_destroy_event_args
{
	uint32_t event_id;		/* to KFD */
	uint32_t pad;
};

struct kfd_ioctl_set_event_args
{
	uint32_t event_id;		/* to KFD */
	uint32_t pad;
};

struct kfd_ioctl_reset_event_args
{
	uint32_t event_id;		/* to KFD */
	uint32_t pad;
};

struct kfd_memory_exception_failure
{
	uint32_t NotPresent;	/* Page not present or supervisor privilege */
	uint32_t ReadOnly;	/* Write access to a read-only page */
	uint32_t NoExecute;	/* Execute access to a page marked NX */
	uint32_t imprecise;	/* Can't determine the	exact fault address */
};

/* memory exception data */
struct kfd_hsa_memory_exception_data
{
        struct kfd_memory_exception_failure failure;
        uint64_t va;
        uint32_t gpu_id;
        uint32_t ErrorType; /* 0 = no RAS error,
                          * 1 = ECC_SRAM,
                          * 2 = Link_SYNFLOOD (poison),
                          * 3 = GPU hang(not attributable to a specific cause),
                          * other values reserved
                          */
};

/* hw exception data */
struct kfd_hsa_hw_exception_data
{
        uint32_t reset_type;
        uint32_t reset_cause;
        uint32_t memory_lost;
        uint32_t gpu_id;
};

/* Event data */
struct kfd_event_data
{
        union
        {
                struct kfd_hsa_memory_exception_data memory_exception_data;
                struct kfd_hsa_hw_exception_data hw_exception_data;
        };                              /* From KFD */
        uint64_t kfd_event_data_ext;    /* pointer to an extension structure
                                           for future exception types */
        uint32_t event_id;              /* to KFD */
        uint32_t pad;
};

struct kfd_ioctl_wait_events_args
{
	uint64_t events_ptr;		/* pointed to struct
					   kfd_event_data array, to KFD */
	uint32_t num_events;		/* to KFD */
	uint32_t wait_for_all;		/* to KFD */
	uint32_t timeout;		/* to KFD */
	uint32_t wait_result;		/* from KFD */
};

struct kfd_ioctl_set_scratch_backing_va_args
{
        uint64_t va_addr;       /* to KFD */
        uint32_t gpu_id;        /* to KFD */
        uint32_t pad;
};

struct kfd_ioctl_get_tile_config_args
{
        /* to KFD: pointer to tile array */
        uint64_t tile_config_ptr;
        /* to KFD: pointer to macro tile array */
        uint64_t macro_tile_config_ptr;
        /* to KFD: array size allocated by user mode
         * from KFD: array size filled by kernel
         */
        uint32_t num_tile_configs;
        /* to KFD: array size allocated by user mode
         * from KFD: array size filled by kernel
         */
        uint32_t num_macro_tile_configs;

        uint32_t gpu_id;                /* to KFD */
        uint32_t gb_addr_config;        /* from KFD */
        uint32_t num_banks;             /* from KFD */
        uint32_t num_ranks;             /* from KFD */
        /* struct size can be extended later if needed
         * without breaking ABI compatibility
         */
};

struct kfd_ioctl_set_trap_handler_args
{
        uint64_t tba_addr;              /* to KFD */
        uint64_t tma_addr;              /* to KFD */
        uint32_t gpu_id;                /* to KFD */
        uint32_t pad;
};

struct kfd_ioctl_acquire_vm_args
{
        uint32_t drm_fd;        /* to KFD */
        uint32_t gpu_id;        /* to KFD */
};

/* Allocation flags: memory types */
#define KFD_IOC_ALLOC_MEM_FLAGS_VRAM		(1 << 0)
#define KFD_IOC_ALLOC_MEM_FLAGS_GTT		(1 << 1)
#define KFD_IOC_ALLOC_MEM_FLAGS_USERPTR		(1 << 2)
#define KFD_IOC_ALLOC_MEM_FLAGS_DOORBELL	(1 << 3)
#define KFD_IOC_ALLOC_MEM_FLAGS_MMIO_REMAP      (1 << 4)
/* Allocation flags: attributes/access options */
#define KFD_IOC_ALLOC_MEM_FLAGS_WRITABLE        (1 << 31)
#define KFD_IOC_ALLOC_MEM_FLAGS_EXECUTABLE      (1 << 30)
#define KFD_IOC_ALLOC_MEM_FLAGS_PUBLIC		(1 << 29)
#define KFD_IOC_ALLOC_MEM_FLAGS_NO_SUBSTITUTE	(1 << 28)
#define KFD_IOC_ALLOC_MEM_FLAGS_AQL_QUEUE_MEM	(1 << 27)
#define KFD_IOC_ALLOC_MEM_FLAGS_COHERENT        (1 << 26)

/* Allocate memory for later SVM (shared virtual memory) mapping.
 *
 * @va_addr:     virtual address of the memory to be allocated
 *               all later mappings on all GPUs will use this address
 * @size:        size in bytes
 * @handle:      buffer handle returned to user mode, used to refer to
 *               this allocation for mapping, unmapping and freeing
 * @mmap_offset: for CPU-mapping the allocation by mmapping a render node
 *               for userptrs this is overloaded to specify the CPU address
 * @gpu_id:      device identifier
 * @flags:       memory type and attributes. See KFD_IOC_ALLOC_MEM_FLAGS above
 */
struct kfd_ioctl_alloc_memory_of_gpu_args
{
	uint64_t va_addr;	/* to KFD */
	uint64_t size;		/* to KFD */
	uint64_t handle;	/* from KFD */
	uint64_t mmap_offset;   /* to KFD (userptr), from KFD (mmap offset) */
	uint32_t gpu_id;	/* to KFD */
	uint32_t flags;
};

/* Free memory allocated with kfd_ioctl_alloc_memory_of_gpu
 *
 * @handle: memory handle returned by alloc
 */
struct kfd_ioctl_free_memory_of_gpu_args
{
	uint64_t handle;	/* to KFD */
};

/* Map memory to one or more GPUs
 *
 * @handle:                memory handle returned by alloc
 * @device_ids_array_ptr:  array of gpu_ids (uint32_t per device)
 * @n_devices:             number of devices in the array
 * @n_success:             number of devices mapped successfully
 *
 * @n_success returns information to the caller how many devices from
 * the start of the array have mapped the buffer successfully. It can
 * be passed into a subsequent retry call to skip those devices. For
 * the first call the caller should initialize it to 0.
 *
 * If the ioctl completes with return code 0 (success), n_success ==
 * n_devices.
 */
struct kfd_ioctl_map_memory_to_gpu_args
{
        uint64_t handle;                        /* to KFD */
        uint64_t device_ids_array_ptr;          /* to KFD */
        uint32_t n_devices;                     /* to KFD */
        uint32_t n_success;                     /* to/from KFD */
};

/* Unmap memory from one or more GPUs
 *
 * same arguments as for mapping
 */
struct kfd_ioctl_unmap_memory_from_gpu_args
{
        uint64_t handle;                        /* to KFD */
        uint64_t device_ids_array_ptr;          /* to KFD */
        uint32_t n_devices;                     /* to KFD */
        uint32_t n_success;                     /* to/from KFD */
};

/* Allocate GWS for specific queue
 *
 * @queue_id:    queue's id that GWS is allocated for
 * @num_gws:     how many GWS to allocate
 * @first_gws:   index of the first GWS allocated.
 *               only support contiguous GWS allocation
 */
struct kfd_ioctl_alloc_queue_gws_args
{
        uint32_t queue_id;              /* to KFD */
        uint32_t num_gws;               /* to KFD */
        uint32_t first_gws;             /* from KFD */
        uint32_t pad;
};

struct kfd_ioctl_get_dmabuf_info_args
{
	uint64_t size;		/* from KFD */
	uint64_t metadata_ptr;	/* to KFD */
	uint32_t metadata_size;	/* to KFD (space allocated by user)
				 * from KFD (actual metadata size) */
	uint32_t gpu_id;	/* from KFD */
	uint32_t flags;		/* from KFD (KFD_IOC_ALLOC_MEM_FLAGS) */
	uint32_t dmabuf_fd;	/* to KFD */
};

struct kfd_ioctl_import_dmabuf_args
{
	uint64_t va_addr;	/* to KFD */
	uint64_t handle;	/* from KFD */
	uint32_t gpu_id;	/* to KFD */
	uint32_t dmabuf_fd;	/* to KFD */
};

/*
 * KFD SMI(System Management Interface) events
 */
enum kfd_smi_event
{
        KFD_SMI_EVENT_NONE = 0,                 /* not used */
        KFD_SMI_EVENT_VMFAULT = 1,              /* event start counting at 1 */
        KFD_SMI_EVENT_THERMAL_THROTTLE = 2,
        KFD_SMI_EVENT_GPU_PRE_RESET = 3,
        KFD_SMI_EVENT_GPU_POST_RESET = 4,
};

#define KFD_SMI_EVENT_MASK_FROM_INDEX(i) (1ULL << ((i) - 1))

struct kfd_ioctl_smi_events_args
{
        uint32_t gpuid;         /* to KFD */
        uint32_t anon_fd;       /* from KFD */
};

/* Register offset inside the remapped mmio page
 */
enum kfd_mmio_remap
{
        KFD_MMIO_REMAP_HDP_MEM_FLUSH_CNTL = 0,
        KFD_MMIO_REMAP_HDP_REG_FLUSH_CNTL = 4,
};

#define AMDKFD_IOCTL_BASE 'K'
#define AMDKFD_IO(nr)			_IO(AMDKFD_IOCTL_BASE, nr)
#define AMDKFD_IOR(nr, type)		_IOR(AMDKFD_IOCTL_BASE, nr, type)
#define AMDKFD_IOW(nr, type)		_IOW(AMDKFD_IOCTL_BASE, nr, type)
#define AMDKFD_IOWR(nr, type)		_IOWR(AMDKFD_IOCTL_BASE, nr, type)

#define AMDKFD_IOC_GET_VERSION			\
		AMDKFD_IOR(0x01, struct kfd_ioctl_get_version_args)

#define AMDKFD_IOC_CREATE_QUEUE			\
		AMDKFD_IOWR(0x02, struct kfd_ioctl_create_queue_args)

#define AMDKFD_IOC_DESTROY_QUEUE		\
		AMDKFD_IOWR(0x03, struct kfd_ioctl_destroy_queue_args)

#define AMDKFD_IOC_SET_MEMORY_POLICY		\
		AMDKFD_IOW(0x04, struct kfd_ioctl_set_memory_policy_args)

#define AMDKFD_IOC_GET_CLOCK_COUNTERS		\
		AMDKFD_IOWR(0x05, struct kfd_ioctl_get_clock_counters_args)

#define AMDKFD_IOC_GET_PROCESS_APERTURES	\
		AMDKFD_IOR(0x06, struct kfd_ioctl_get_process_apertures_args)

#define AMDKFD_IOC_UPDATE_QUEUE			\
		AMDKFD_IOW(0x07, struct kfd_ioctl_update_queue_args)

#define AMDKFD_IOC_CREATE_EVENT			\
		AMDKFD_IOWR(0x08, struct kfd_ioctl_create_event_args)

#define AMDKFD_IOC_DESTROY_EVENT		\
		AMDKFD_IOW(0x09, struct kfd_ioctl_destroy_event_args)

#define AMDKFD_IOC_SET_EVENT			\
		AMDKFD_IOW(0x0A, struct kfd_ioctl_set_event_args)

#define AMDKFD_IOC_RESET_EVENT			\
		AMDKFD_IOW(0x0B, struct kfd_ioctl_reset_event_args)

#define AMDKFD_IOC_WAIT_EVENTS			\
		AMDKFD_IOWR(0x0C, struct kfd_ioctl_wait_events_args)

#define AMDKFD_IOC_DBG_REGISTER			\
		AMDKFD_IOW(0x0D, struct kfd_ioctl_dbg_register_args)

#define AMDKFD_IOC_DBG_UNREGISTER		\
		AMDKFD_IOW(0x0E, struct kfd_ioctl_dbg_unregister_args)

#define AMDKFD_IOC_DBG_ADDRESS_WATCH		\
		AMDKFD_IOW(0x0F, struct kfd_ioctl_dbg_address_watch_args)

#define AMDKFD_IOC_DBG_WAVE_CONTROL		\
		AMDKFD_IOW(0x10, struct kfd_ioctl_dbg_wave_control_args)

#define AMDKFD_IOC_SET_SCRATCH_BACKING_VA       \
                AMDKFD_IOWR(0x11, struct kfd_ioctl_set_scratch_backing_va_args)

#define AMDKFD_IOC_GET_TILE_CONFIG              \
                AMDKFD_IOWR(0x12, struct kfd_ioctl_get_tile_config_args)

#define AMDKFD_IOC_SET_TRAP_HANDLER             \
                AMDKFD_IOW(0x13, struct kfd_ioctl_set_trap_handler_args)

#define AMDKFD_IOC_GET_PROCESS_APERTURES_NEW    \
                AMDKFD_IOWR(0x14,               \
                        struct kfd_ioctl_get_process_apertures_new_args)

#define AMDKFD_IOC_ACQUIRE_VM                   \
                AMDKFD_IOW(0x15, struct kfd_ioctl_acquire_vm_args)

#define AMDKFD_IOC_ALLOC_MEMORY_OF_GPU          \
                AMDKFD_IOWR(0x16, struct kfd_ioctl_alloc_memory_of_gpu_args)

#define AMDKFD_IOC_FREE_MEMORY_OF_GPU           \
                AMDKFD_IOW(0x17, struct kfd_ioctl_free_memory_of_gpu_args)

#define AMDKFD_IOC_MAP_MEMORY_TO_GPU            \
                AMDKFD_IOWR(0x18, struct kfd_ioctl_map_memory_to_gpu_args)

#define AMDKFD_IOC_UNMAP_MEMORY_FROM_GPU        \
                AMDKFD_IOWR(0x19, struct kfd_ioctl_unmap_memory_from_gpu_args)

#define AMDKFD_IOC_SET_CU_MASK                  \
                AMDKFD_IOW(0x1A, struct kfd_ioctl_set_cu_mask_args)

#define AMDKFD_IOC_GET_QUEUE_WAVE_STATE         \
                AMDKFD_IOWR(0x1B, struct kfd_ioctl_get_queue_wave_state_args)

#define AMDKFD_IOC_GET_DMABUF_INFO              \
                AMDKFD_IOWR(0x1C, struct kfd_ioctl_get_dmabuf_info_args)

#define AMDKFD_IOC_IMPORT_DMABUF                \
                AMDKFD_IOWR(0x1D, struct kfd_ioctl_import_dmabuf_args)

#define AMDKFD_IOC_ALLOC_QUEUE_GWS              \
                AMDKFD_IOWR(0x1E, struct kfd_ioctl_alloc_queue_gws_args)

#define AMDKFD_IOC_SMI_EVENTS                   \
                AMDKFD_IOWR(0x1F, struct kfd_ioctl_smi_events_args)

#define AMDKFD_COMMAND_START		0x01
#define AMDKFD_COMMAND_END              0x20

} // namespace gem5

#endif