Contents

Core API

Contents

Core API

oneAPI Level Zero Specification - Version 1.8.0

Common

Common Enums

ze_result_t

enum ze_result_t

Defines Return/Error codes.

Values:

enumerator ZE_RESULT_SUCCESS

[Core] success

enumerator ZE_RESULT_NOT_READY

[Core] synchronization primitive not signaled

enumerator ZE_RESULT_ERROR_DEVICE_LOST

[Core] device hung, reset, was removed, or driver update occurred

enumerator ZE_RESULT_ERROR_OUT_OF_HOST_MEMORY

[Core] insufficient host memory to satisfy call

enumerator ZE_RESULT_ERROR_OUT_OF_DEVICE_MEMORY

[Core] insufficient device memory to satisfy call

enumerator ZE_RESULT_ERROR_MODULE_BUILD_FAILURE

[Core] error occurred when building module, see build log for details

enumerator ZE_RESULT_ERROR_MODULE_LINK_FAILURE

[Core] error occurred when linking modules, see build log for details

enumerator ZE_RESULT_ERROR_DEVICE_REQUIRES_RESET

[Core] device requires a reset

enumerator ZE_RESULT_ERROR_DEVICE_IN_LOW_POWER_STATE

[Core] device currently in low power state

enumerator ZE_RESULT_EXP_ERROR_DEVICE_IS_NOT_VERTEX

[Core, Experimental] device is not represented by a fabric vertex

enumerator ZE_RESULT_EXP_ERROR_VERTEX_IS_NOT_DEVICE

[Core, Experimental] fabric vertex does not represent a device

enumerator ZE_RESULT_EXP_ERROR_REMOTE_DEVICE

[Core, Experimental] fabric vertex represents a remote device or subdevice

enumerator ZE_RESULT_EXP_ERROR_OPERANDS_INCOMPATIBLE

[Core, Experimental] operands of comparison are not compatible

enumerator ZE_RESULT_EXP_RTAS_BUILD_RETRY

[Core, Experimental] ray tracing acceleration structure build operation failed due to insufficient resources, retry with a larger acceleration structure buffer allocation

enumerator ZE_RESULT_EXP_RTAS_BUILD_DEFERRED

[Core, Experimental] ray tracing acceleration structure build operation deferred to parallel operation join

enumerator ZE_RESULT_ERROR_INSUFFICIENT_PERMISSIONS

[Sysman] access denied due to permission level

enumerator ZE_RESULT_ERROR_NOT_AVAILABLE

[Sysman] resource already in use and simultaneous access not allowed or resource was removed

enumerator ZE_RESULT_ERROR_DEPENDENCY_UNAVAILABLE

[Common] external required dependency is unavailable or missing

enumerator ZE_RESULT_WARNING_DROPPED_DATA

[Tools] data may have been dropped

enumerator ZE_RESULT_ERROR_UNINITIALIZED

[Validation] driver is not initialized

enumerator ZE_RESULT_ERROR_UNSUPPORTED_VERSION

[Validation] generic error code for unsupported versions

enumerator ZE_RESULT_ERROR_UNSUPPORTED_FEATURE

[Validation] generic error code for unsupported features

enumerator ZE_RESULT_ERROR_INVALID_ARGUMENT

[Validation] generic error code for invalid arguments

enumerator ZE_RESULT_ERROR_INVALID_NULL_HANDLE

[Validation] handle argument is not valid

enumerator ZE_RESULT_ERROR_HANDLE_OBJECT_IN_USE

[Validation] object pointed to by handle still in-use by device

enumerator ZE_RESULT_ERROR_INVALID_NULL_POINTER

[Validation] pointer argument may not be nullptr

enumerator ZE_RESULT_ERROR_INVALID_SIZE

[Validation] size argument is invalid (e.g., must not be zero)

enumerator ZE_RESULT_ERROR_UNSUPPORTED_SIZE

[Validation] size argument is not supported by the device (e.g., too large)

enumerator ZE_RESULT_ERROR_UNSUPPORTED_ALIGNMENT

[Validation] alignment argument is not supported by the device (e.g., too small)

enumerator ZE_RESULT_ERROR_INVALID_SYNCHRONIZATION_OBJECT

[Validation] synchronization object in invalid state

enumerator ZE_RESULT_ERROR_INVALID_ENUMERATION

[Validation] enumerator argument is not valid

enumerator ZE_RESULT_ERROR_UNSUPPORTED_ENUMERATION

[Validation] enumerator argument is not supported by the device

enumerator ZE_RESULT_ERROR_UNSUPPORTED_IMAGE_FORMAT

[Validation] image format is not supported by the device

enumerator ZE_RESULT_ERROR_INVALID_NATIVE_BINARY

[Validation] native binary is not supported by the device

enumerator ZE_RESULT_ERROR_INVALID_GLOBAL_NAME

[Validation] global variable is not found in the module

enumerator ZE_RESULT_ERROR_INVALID_KERNEL_NAME

[Validation] kernel name is not found in the module

enumerator ZE_RESULT_ERROR_INVALID_FUNCTION_NAME

[Validation] function name is not found in the module

enumerator ZE_RESULT_ERROR_INVALID_GROUP_SIZE_DIMENSION

[Validation] group size dimension is not valid for the kernel or device

enumerator ZE_RESULT_ERROR_INVALID_GLOBAL_WIDTH_DIMENSION

[Validation] global width dimension is not valid for the kernel or device

enumerator ZE_RESULT_ERROR_INVALID_KERNEL_ARGUMENT_INDEX

[Validation] kernel argument index is not valid for kernel

enumerator ZE_RESULT_ERROR_INVALID_KERNEL_ARGUMENT_SIZE

[Validation] kernel argument size does not match kernel

enumerator ZE_RESULT_ERROR_INVALID_KERNEL_ATTRIBUTE_VALUE

[Validation] value of kernel attribute is not valid for the kernel or device

enumerator ZE_RESULT_ERROR_INVALID_MODULE_UNLINKED

[Validation] module with imports needs to be linked before kernels can be created from it.

enumerator ZE_RESULT_ERROR_INVALID_COMMAND_LIST_TYPE

[Validation] command list type does not match command queue type

enumerator ZE_RESULT_ERROR_OVERLAPPING_REGIONS

[Validation] copy operations do not support overlapping regions of memory

enumerator ZE_RESULT_WARNING_ACTION_REQUIRED

[Sysman] an action is required to complete the desired operation

enumerator ZE_RESULT_ERROR_UNKNOWN

[Core] unknown or internal error

enumerator ZE_RESULT_FORCE_UINT32

ze_structure_type_t

enum ze_structure_type_t

Defines structure types.

Values:

enumerator ZE_STRUCTURE_TYPE_DRIVER_PROPERTIES

ze_driver_properties_t

enumerator ZE_STRUCTURE_TYPE_DRIVER_IPC_PROPERTIES

ze_driver_ipc_properties_t

enumerator ZE_STRUCTURE_TYPE_DEVICE_PROPERTIES

ze_device_properties_t

enumerator ZE_STRUCTURE_TYPE_DEVICE_COMPUTE_PROPERTIES

ze_device_compute_properties_t

enumerator ZE_STRUCTURE_TYPE_DEVICE_MODULE_PROPERTIES

ze_device_module_properties_t

enumerator ZE_STRUCTURE_TYPE_COMMAND_QUEUE_GROUP_PROPERTIES

ze_command_queue_group_properties_t

enumerator ZE_STRUCTURE_TYPE_DEVICE_MEMORY_PROPERTIES

ze_device_memory_properties_t

enumerator ZE_STRUCTURE_TYPE_DEVICE_MEMORY_ACCESS_PROPERTIES

ze_device_memory_access_properties_t

enumerator ZE_STRUCTURE_TYPE_DEVICE_CACHE_PROPERTIES

ze_device_cache_properties_t

enumerator ZE_STRUCTURE_TYPE_DEVICE_IMAGE_PROPERTIES

ze_device_image_properties_t

enumerator ZE_STRUCTURE_TYPE_DEVICE_P2P_PROPERTIES

ze_device_p2p_properties_t

enumerator ZE_STRUCTURE_TYPE_DEVICE_EXTERNAL_MEMORY_PROPERTIES

ze_device_external_memory_properties_t

enumerator ZE_STRUCTURE_TYPE_CONTEXT_DESC

ze_context_desc_t

enumerator ZE_STRUCTURE_TYPE_COMMAND_QUEUE_DESC

ze_command_queue_desc_t

enumerator ZE_STRUCTURE_TYPE_COMMAND_LIST_DESC

ze_command_list_desc_t

enumerator ZE_STRUCTURE_TYPE_EVENT_POOL_DESC

ze_event_pool_desc_t

enumerator ZE_STRUCTURE_TYPE_EVENT_DESC

ze_event_desc_t

enumerator ZE_STRUCTURE_TYPE_FENCE_DESC

ze_fence_desc_t

enumerator ZE_STRUCTURE_TYPE_IMAGE_DESC

ze_image_desc_t

enumerator ZE_STRUCTURE_TYPE_IMAGE_PROPERTIES

ze_image_properties_t

enumerator ZE_STRUCTURE_TYPE_DEVICE_MEM_ALLOC_DESC

ze_device_mem_alloc_desc_t

enumerator ZE_STRUCTURE_TYPE_HOST_MEM_ALLOC_DESC

ze_host_mem_alloc_desc_t

enumerator ZE_STRUCTURE_TYPE_MEMORY_ALLOCATION_PROPERTIES

ze_memory_allocation_properties_t

enumerator ZE_STRUCTURE_TYPE_EXTERNAL_MEMORY_EXPORT_DESC

ze_external_memory_export_desc_t

enumerator ZE_STRUCTURE_TYPE_EXTERNAL_MEMORY_IMPORT_FD

ze_external_memory_import_fd_t

enumerator ZE_STRUCTURE_TYPE_EXTERNAL_MEMORY_EXPORT_FD

ze_external_memory_export_fd_t

enumerator ZE_STRUCTURE_TYPE_MODULE_DESC

ze_module_desc_t

enumerator ZE_STRUCTURE_TYPE_MODULE_PROPERTIES

ze_module_properties_t

enumerator ZE_STRUCTURE_TYPE_KERNEL_DESC

ze_kernel_desc_t

enumerator ZE_STRUCTURE_TYPE_KERNEL_PROPERTIES

ze_kernel_properties_t

enumerator ZE_STRUCTURE_TYPE_SAMPLER_DESC

ze_sampler_desc_t

enumerator ZE_STRUCTURE_TYPE_PHYSICAL_MEM_DESC

ze_physical_mem_desc_t

enumerator ZE_STRUCTURE_TYPE_KERNEL_PREFERRED_GROUP_SIZE_PROPERTIES

ze_kernel_preferred_group_size_properties_t

enumerator ZE_STRUCTURE_TYPE_EXTERNAL_MEMORY_IMPORT_WIN32

ze_external_memory_import_win32_handle_t

enumerator ZE_STRUCTURE_TYPE_EXTERNAL_MEMORY_EXPORT_WIN32

ze_external_memory_export_win32_handle_t

enumerator ZE_STRUCTURE_TYPE_DEVICE_RAYTRACING_EXT_PROPERTIES

ze_device_raytracing_ext_properties_t

enumerator ZE_STRUCTURE_TYPE_RAYTRACING_MEM_ALLOC_EXT_DESC

ze_raytracing_mem_alloc_ext_desc_t

enumerator ZE_STRUCTURE_TYPE_FLOAT_ATOMIC_EXT_PROPERTIES

ze_float_atomic_ext_properties_t

enumerator ZE_STRUCTURE_TYPE_CACHE_RESERVATION_EXT_DESC

ze_cache_reservation_ext_desc_t

enumerator ZE_STRUCTURE_TYPE_EU_COUNT_EXT

ze_eu_count_ext_t

enumerator ZE_STRUCTURE_TYPE_SRGB_EXT_DESC

ze_srgb_ext_desc_t

enumerator ZE_STRUCTURE_TYPE_LINKAGE_INSPECTION_EXT_DESC

ze_linkage_inspection_ext_desc_t

enumerator ZE_STRUCTURE_TYPE_PCI_EXT_PROPERTIES

ze_pci_ext_properties_t

enumerator ZE_STRUCTURE_TYPE_DRIVER_MEMORY_FREE_EXT_PROPERTIES

ze_driver_memory_free_ext_properties_t

enumerator ZE_STRUCTURE_TYPE_MEMORY_FREE_EXT_DESC

ze_memory_free_ext_desc_t

enumerator ZE_STRUCTURE_TYPE_MEMORY_COMPRESSION_HINTS_EXT_DESC

ze_memory_compression_hints_ext_desc_t

enumerator ZE_STRUCTURE_TYPE_IMAGE_ALLOCATION_EXT_PROPERTIES

ze_image_allocation_ext_properties_t

enumerator ZE_STRUCTURE_TYPE_DEVICE_LUID_EXT_PROPERTIES

ze_device_luid_ext_properties_t

enumerator ZE_STRUCTURE_TYPE_DEVICE_MEMORY_EXT_PROPERTIES

ze_device_memory_ext_properties_t

enumerator ZE_STRUCTURE_TYPE_DEVICE_IP_VERSION_EXT

ze_device_ip_version_ext_t

enumerator ZE_STRUCTURE_TYPE_IMAGE_VIEW_PLANAR_EXT_DESC

ze_image_view_planar_ext_desc_t

enumerator ZE_STRUCTURE_TYPE_EVENT_QUERY_KERNEL_TIMESTAMPS_EXT_PROPERTIES

ze_event_query_kernel_timestamps_ext_properties_t

enumerator ZE_STRUCTURE_TYPE_EVENT_QUERY_KERNEL_TIMESTAMPS_RESULTS_EXT_PROPERTIES

ze_event_query_kernel_timestamps_results_ext_properties_t

enumerator ZE_STRUCTURE_TYPE_KERNEL_MAX_GROUP_SIZE_EXT_PROPERTIES

ze_kernel_max_group_size_ext_properties_t

enumerator ZE_STRUCTURE_TYPE_RELAXED_ALLOCATION_LIMITS_EXP_DESC

ze_relaxed_allocation_limits_exp_desc_t

enumerator ZE_STRUCTURE_TYPE_MODULE_PROGRAM_EXP_DESC

ze_module_program_exp_desc_t

enumerator ZE_STRUCTURE_TYPE_SCHEDULING_HINT_EXP_PROPERTIES

ze_scheduling_hint_exp_properties_t

enumerator ZE_STRUCTURE_TYPE_SCHEDULING_HINT_EXP_DESC

ze_scheduling_hint_exp_desc_t

enumerator ZE_STRUCTURE_TYPE_IMAGE_VIEW_PLANAR_EXP_DESC

ze_image_view_planar_exp_desc_t

enumerator ZE_STRUCTURE_TYPE_DEVICE_PROPERTIES_1_2

ze_device_properties_t

enumerator ZE_STRUCTURE_TYPE_IMAGE_MEMORY_EXP_PROPERTIES

ze_image_memory_properties_exp_t

enumerator ZE_STRUCTURE_TYPE_POWER_SAVING_HINT_EXP_DESC

ze_context_power_saving_hint_exp_desc_t

enumerator ZE_STRUCTURE_TYPE_COPY_BANDWIDTH_EXP_PROPERTIES

ze_copy_bandwidth_exp_properties_t

enumerator ZE_STRUCTURE_TYPE_DEVICE_P2P_BANDWIDTH_EXP_PROPERTIES

ze_device_p2p_bandwidth_exp_properties_t

enumerator ZE_STRUCTURE_TYPE_FABRIC_VERTEX_EXP_PROPERTIES

ze_fabric_vertex_exp_properties_t

enumerator ZE_STRUCTURE_TYPE_FABRIC_EDGE_EXP_PROPERTIES

ze_fabric_edge_exp_properties_t

enumerator ZE_STRUCTURE_TYPE_MEMORY_SUB_ALLOCATIONS_EXP_PROPERTIES

ze_memory_sub_allocations_exp_properties_t

enumerator ZE_STRUCTURE_TYPE_RTAS_BUILDER_EXP_DESC

ze_rtas_builder_exp_desc_t

enumerator ZE_STRUCTURE_TYPE_RTAS_BUILDER_BUILD_OP_EXP_DESC

ze_rtas_builder_build_op_exp_desc_t

enumerator ZE_STRUCTURE_TYPE_RTAS_BUILDER_EXP_PROPERTIES

ze_rtas_builder_exp_properties_t

enumerator ZE_STRUCTURE_TYPE_RTAS_PARALLEL_OPERATION_EXP_PROPERTIES

ze_rtas_parallel_operation_exp_properties_t

enumerator ZE_STRUCTURE_TYPE_RTAS_DEVICE_EXP_PROPERTIES

ze_rtas_device_exp_properties_t

enumerator ZE_STRUCTURE_TYPE_RTAS_GEOMETRY_AABBS_EXP_CB_PARAMS

ze_rtas_geometry_aabbs_exp_cb_params_t

enumerator ZE_STRUCTURE_TYPE_COUNTER_BASED_EVENT_POOL_EXP_DESC

ze_event_pool_counter_based_exp_desc_t

enumerator ZE_STRUCTURE_TYPE_FORCE_UINT32

ze_external_memory_type_flags_t

enum ze_external_memory_type_flag_t

Values:

enumerator ZE_EXTERNAL_MEMORY_TYPE_FLAG_OPAQUE_FD

an opaque POSIX file descriptor handle

enumerator ZE_EXTERNAL_MEMORY_TYPE_FLAG_DMA_BUF

a file descriptor handle for a Linux dma_buf

enumerator ZE_EXTERNAL_MEMORY_TYPE_FLAG_OPAQUE_WIN32

an NT handle

enumerator ZE_EXTERNAL_MEMORY_TYPE_FLAG_OPAQUE_WIN32_KMT

a global share (KMT) handle

enumerator ZE_EXTERNAL_MEMORY_TYPE_FLAG_D3D11_TEXTURE

an NT handle referring to a Direct3D 10 or 11 texture resource

enumerator ZE_EXTERNAL_MEMORY_TYPE_FLAG_D3D11_TEXTURE_KMT

a global share (KMT) handle referring to a Direct3D 10 or 11 texture resource

enumerator ZE_EXTERNAL_MEMORY_TYPE_FLAG_D3D12_HEAP

an NT handle referring to a Direct3D 12 heap resource

enumerator ZE_EXTERNAL_MEMORY_TYPE_FLAG_D3D12_RESOURCE

an NT handle referring to a Direct3D 12 committed resource

enumerator ZE_EXTERNAL_MEMORY_TYPE_FLAG_FORCE_UINT32

ze_bandwidth_unit_t

enum ze_bandwidth_unit_t

Bandwidth unit.

Values:

enumerator ZE_BANDWIDTH_UNIT_UNKNOWN

The unit used for bandwidth is unknown.

enumerator ZE_BANDWIDTH_UNIT_BYTES_PER_NANOSEC

Bandwidth is provided in bytes/nanosec.

enumerator ZE_BANDWIDTH_UNIT_BYTES_PER_CLOCK

Bandwidth is provided in bytes/clock.

enumerator ZE_BANDWIDTH_UNIT_FORCE_UINT32

ze_latency_unit_t

enum ze_latency_unit_t

Latency unit.

Values:

enumerator ZE_LATENCY_UNIT_UNKNOWN

The unit used for latency is unknown.

enumerator ZE_LATENCY_UNIT_NANOSEC

Latency is provided in nanosecs.

enumerator ZE_LATENCY_UNIT_CLOCK

Latency is provided in clocks.

enumerator ZE_LATENCY_UNIT_HOP

Latency is provided in hops (normalized so that the lowest latency link has a latency of 1 hop)

enumerator ZE_LATENCY_UNIT_FORCE_UINT32

Common Structures

ze_ipc_mem_handle_t

struct ze_ipc_mem_handle_t

IPC handle to a memory allocation.

Public Members

char data[ZE_MAX_IPC_HANDLE_SIZE]

[out] Opaque data representing an IPC handle

ze_ipc_event_pool_handle_t

struct ze_ipc_event_pool_handle_t

IPC handle to a event pool allocation.

Public Members

char data[ZE_MAX_IPC_HANDLE_SIZE]

[out] Opaque data representing an IPC handle

ze_uuid_t

struct ze_uuid_t

Universal unique id (UUID)

Public Members

uint8_t id[ZE_MAX_UUID_SIZE]

[out] opaque data representing a UUID

ze_base_cb_params_t

struct ze_base_cb_params_t

Base for all callback function parameter types.

Public Members

ze_structure_type_t stype

[in] type of this structure

void *pNext

[in,out][optional] must be null or a pointer to an extension-specific structure (i.e. contains stype and pNext).

ze_base_properties_t

struct ze_base_properties_t

Base for all properties types.

Public Members

ze_structure_type_t stype

[in] type of this structure

void *pNext

[in,out][optional] must be null or a pointer to an extension-specific structure (i.e. contains stype and pNext).

ze_base_desc_t

struct ze_base_desc_t

Base for all descriptor types.

Public Members

ze_structure_type_t stype

[in] type of this structure

const void *pNext

[in][optional] must be null or a pointer to an extension-specific structure (i.e. contains stype and pNext).

Driver

Driver Functions

zeInit

ZE_APIEXPORT ze_result_t ZE_APICALL zeInit(ze_init_flags_t flags)

Initialize the ‘oneAPI’ driver(s)

  • The application must call this function before calling any other function.

  • If this function is not called then all other functions will return ZE_RESULT_ERROR_UNINITIALIZED.

  • Only one instance of each driver will be initialized per process.

  • The application may call this function multiple times with different flags or environment variables enabled.

  • The application must call this function after forking new processes. Each forked process must call this function.

  • The application may call this function from simultaneous threads.

  • The implementation of this function must be thread-safe for scenarios where multiple libraries may initialize the driver(s) simultaneously.

Parameters

flags – [in] initialization flags. must be 0 (default) or a combination of ze_init_flag_t.

Returns

zeDriverGet

ZE_APIEXPORT ze_result_t ZE_APICALL zeDriverGet(uint32_t *pCount, ze_driver_handle_t *phDrivers)

Retrieves driver instances.

  • A driver represents a collection of physical devices.

  • Multiple calls to this function will return identical driver handles, in the same order.

  • The application may pass nullptr for pDrivers when only querying the number of drivers.

  • The application may call this function from simultaneous threads.

  • The implementation of this function should be lock-free.

Remark

Analogues

  • clGetPlatformIDs

Parameters

  • pCount – [in,out] pointer to the number of driver instances. if count is zero, then the loader shall update the value with the total number of drivers available. if count is greater than the number of drivers available, then the loader shall update the value with the correct number of drivers available.

  • phDrivers – [in,out][optional][range(0, *pCount)] array of driver instance handles. if count is less than the number of drivers available, then the loader shall only retrieve that number of drivers.

Returns

zeDriverGetApiVersion

ZE_APIEXPORT ze_result_t ZE_APICALL zeDriverGetApiVersion(ze_driver_handle_t hDriver, ze_api_version_t *version)

Returns the API version supported by the specified driver.

  • The application may call this function from simultaneous threads.

  • The implementation of this function should be lock-free.

Parameters

  • hDriver – [in] handle of the driver instance

  • version – [out] api version

Returns

zeDriverGetProperties

ZE_APIEXPORT ze_result_t ZE_APICALL zeDriverGetProperties(ze_driver_handle_t hDriver, ze_driver_properties_t *pDriverProperties)

Retrieves properties of the driver.

  • The application may call this function from simultaneous threads.

  • The implementation of this function should be lock-free.

Remark

Analogues

  • clGetPlatformInfo

Parameters

  • hDriver – [in] handle of the driver instance

  • pDriverProperties – [in,out] query result for driver properties

Returns

zeDriverGetIpcProperties

ZE_APIEXPORT ze_result_t ZE_APICALL zeDriverGetIpcProperties(ze_driver_handle_t hDriver, ze_driver_ipc_properties_t *pIpcProperties)

Retrieves IPC attributes of the driver.

  • The application may call this function from simultaneous threads.

  • The implementation of this function should be lock-free.

Parameters

  • hDriver – [in] handle of the driver instance

  • pIpcProperties – [in,out] query result for IPC properties

Returns

zeDriverGetExtensionProperties

ZE_APIEXPORT ze_result_t ZE_APICALL zeDriverGetExtensionProperties(ze_driver_handle_t hDriver, uint32_t *pCount, ze_driver_extension_properties_t *pExtensionProperties)

Retrieves extension properties.

  • The application may call this function from simultaneous threads.

  • The implementation of this function should be lock-free.

Remark

Analogues

  • vkEnumerateInstanceExtensionProperties

Parameters

  • hDriver – [in] handle of the driver instance

  • pCount – [in,out] pointer to the number of extension properties. if count is zero, then the driver shall update the value with the total number of extension properties available. if count is greater than the number of extension properties available, then the driver shall update the value with the correct number of extension properties available.

  • pExtensionProperties – [in,out][optional][range(0, *pCount)] array of query results for extension properties. if count is less than the number of extension properties available, then driver shall only retrieve that number of extension properties.

Returns

zeDriverGetExtensionFunctionAddress

ZE_APIEXPORT ze_result_t ZE_APICALL zeDriverGetExtensionFunctionAddress(ze_driver_handle_t hDriver, const char *name, void **ppFunctionAddress)

Retrieves function pointer for vendor-specific or experimental extensions.

  • The application may call this function from simultaneous threads.

  • The implementation of this function should be lock-free.

Parameters

  • hDriver – [in] handle of the driver instance

  • name – [in] extension function name

  • ppFunctionAddress – [out] pointer to function pointer

Returns

zeDriverGetLastErrorDescription

ZE_APIEXPORT ze_result_t ZE_APICALL zeDriverGetLastErrorDescription(ze_driver_handle_t hDriver, const char **ppString)

Retrieves a string describing the last error code returned by the driver in the current thread.

  • String returned is thread local.

  • String is only updated on calls returning an error, i.e., not on calls returning ZE_RESULT_SUCCESS.

  • String may be empty if driver considers error code is already explicit enough to describe cause.

  • Memory pointed to by ppString is owned by the driver.

  • String returned is null-terminated.

Parameters

  • hDriver – [in] handle of the driver instance

  • ppString – [in,out] pointer to a null-terminated array of characters describing cause of error.

Returns

Driver Enums

ze_init_flags_t

enum ze_init_flag_t

Values:

enumerator ZE_INIT_FLAG_GPU_ONLY

only initialize GPU drivers

enumerator ZE_INIT_FLAG_VPU_ONLY

only initialize VPU drivers

enumerator ZE_INIT_FLAG_FORCE_UINT32

ze_api_version_t

enum ze_api_version_t

Supported API versions.

  • API versions contain major and minor attributes, use ZE_MAJOR_VERSION and ZE_MINOR_VERSION

Values:

enumerator ZE_API_VERSION_1_0

version 1.0

enumerator ZE_API_VERSION_1_1

version 1.1

enumerator ZE_API_VERSION_1_2

version 1.2

enumerator ZE_API_VERSION_1_3

version 1.3

enumerator ZE_API_VERSION_1_4

version 1.4

enumerator ZE_API_VERSION_1_5

version 1.5

enumerator ZE_API_VERSION_1_6

version 1.6

enumerator ZE_API_VERSION_1_7

version 1.7

enumerator ZE_API_VERSION_1_8

version 1.8

enumerator ZE_API_VERSION_CURRENT

latest known version

enumerator ZE_API_VERSION_FORCE_UINT32

ze_ipc_property_flags_t

enum ze_ipc_property_flag_t

Values:

enumerator ZE_IPC_PROPERTY_FLAG_MEMORY

Supports passing memory allocations between processes. See zeMemGetIpcHandle.

enumerator ZE_IPC_PROPERTY_FLAG_EVENT_POOL

Supports passing event pools between processes. See zeEventPoolGetIpcHandle.

enumerator ZE_IPC_PROPERTY_FLAG_FORCE_UINT32

Driver Structures

ze_driver_uuid_t

struct ze_driver_uuid_t

Driver universal unique id (UUID)

Public Members

uint8_t id[ZE_MAX_DRIVER_UUID_SIZE]

[out] opaque data representing a driver UUID

ze_driver_properties_t

struct ze_driver_properties_t

Driver properties queried using zeDriverGetProperties.

Public Members

ze_structure_type_t stype

[in] type of this structure

void *pNext

[in,out][optional] must be null or a pointer to an extension-specific structure (i.e. contains stype and pNext).

ze_driver_uuid_t uuid

[out] universal unique identifier.

uint32_t driverVersion

[out] driver version The driver version is a non-zero, monotonically increasing value where higher values always indicate a more recent version.

ze_driver_ipc_properties_t

struct ze_driver_ipc_properties_t

IPC properties queried using zeDriverGetIpcProperties.

Public Members

ze_structure_type_t stype

[in] type of this structure

void *pNext

[in,out][optional] must be null or a pointer to an extension-specific structure (i.e. contains stype and pNext).

ze_ipc_property_flags_t flags

[out] 0 (none) or a valid combination of ze_ipc_property_flag_t

ze_driver_extension_properties_t

struct ze_driver_extension_properties_t

Extension properties queried using zeDriverGetExtensionProperties.

Public Members

char name[ZE_MAX_EXTENSION_NAME]

[out] extension name

uint32_t version

[out] extension version using ZE_MAKE_VERSION

Device

Device Functions

zeDeviceGet

ZE_APIEXPORT ze_result_t ZE_APICALL zeDeviceGet(ze_driver_handle_t hDriver, uint32_t *pCount, ze_device_handle_t *phDevices)

Retrieves devices within a driver.

  • Multiple calls to this function will return identical device handles, in the same order.

  • The number and order of handles returned from this function is affected by the ::ZE_AFFINITY_MASK and ::ZE_ENABLE_PCI_ID_DEVICE_ORDER environment variables.

  • The application may call this function from simultaneous threads.

  • The implementation of this function should be lock-free.

Parameters

  • hDriver – [in] handle of the driver instance

  • pCount – [in,out] pointer to the number of devices. if count is zero, then the driver shall update the value with the total number of devices available. if count is greater than the number of devices available, then the driver shall update the value with the correct number of devices available.

  • phDevices – [in,out][optional][range(0, *pCount)] array of handle of devices. if count is less than the number of devices available, then driver shall only retrieve that number of devices.

Returns

zeDeviceGetRootDevice

ZE_APIEXPORT ze_result_t ZE_APICALL zeDeviceGetRootDevice(ze_device_handle_t hDevice, ze_device_handle_t *phRootDevice)

Retrieves the root-device of a device handle.

  • When the device handle passed does not belong to any root-device, nullptr is returned.

  • Multiple calls to this function will return the same device handle.

  • The root-device handle returned by this function does not have access automatically to the resources created with the associated sub-device, unless those resources have been created with a context explicitly containing both handles.

  • The application may call this function from simultaneous threads.

  • The implementation of this function should be lock-free.

Parameters

  • hDevice – [in] handle of the device object

  • phRootDevice – [in,out] parent root device.

Returns

zeDeviceGetSubDevices

ZE_APIEXPORT ze_result_t ZE_APICALL zeDeviceGetSubDevices(ze_device_handle_t hDevice, uint32_t *pCount, ze_device_handle_t *phSubdevices)

Retrieves a sub-device from a device.

  • When the device handle passed does not contain any sub-device, a pCount of 0 is returned.

  • Multiple calls to this function will return identical device handles, in the same order.

  • The number of handles returned from this function is affected by the ::ZE_AFFINITY_MASK environment variable.

  • The application may call this function from simultaneous threads.

  • The implementation of this function should be lock-free.

Remark

Analogues

  • clCreateSubDevices

Parameters

  • hDevice – [in] handle of the device object

  • pCount – [in,out] pointer to the number of sub-devices. if count is zero, then the driver shall update the value with the total number of sub-devices available. if count is greater than the number of sub-devices available, then the driver shall update the value with the correct number of sub-devices available.

  • phSubdevices – [in,out][optional][range(0, *pCount)] array of handle of sub-devices. if count is less than the number of sub-devices available, then driver shall only retrieve that number of sub-devices.

Returns

zeDeviceGetProperties

ZE_APIEXPORT ze_result_t ZE_APICALL zeDeviceGetProperties(ze_device_handle_t hDevice, ze_device_properties_t *pDeviceProperties)

Retrieves properties of the device.

  • The application may call this function from simultaneous threads.

  • The implementation of this function should be lock-free.

Remark

Analogues

  • clGetDeviceInfo

Parameters

  • hDevice – [in] handle of the device

  • pDeviceProperties – [in,out] query result for device properties

Returns

zeDeviceGetComputeProperties

ZE_APIEXPORT ze_result_t ZE_APICALL zeDeviceGetComputeProperties(ze_device_handle_t hDevice, ze_device_compute_properties_t *pComputeProperties)

Retrieves compute properties of the device.

  • The application may call this function from simultaneous threads.

  • The implementation of this function should be lock-free.

Remark

Analogues

  • clGetDeviceInfo

Parameters

  • hDevice – [in] handle of the device

  • pComputeProperties – [in,out] query result for compute properties

Returns

zeDeviceGetModuleProperties

ZE_APIEXPORT ze_result_t ZE_APICALL zeDeviceGetModuleProperties(ze_device_handle_t hDevice, ze_device_module_properties_t *pModuleProperties)

Retrieves module properties of the device.

  • The application may call this function from simultaneous threads.

  • The implementation of this function should be lock-free.

Parameters

  • hDevice – [in] handle of the device

  • pModuleProperties – [in,out] query result for module properties

Returns

zeDeviceGetCommandQueueGroupProperties

ZE_APIEXPORT ze_result_t ZE_APICALL zeDeviceGetCommandQueueGroupProperties(ze_device_handle_t hDevice, uint32_t *pCount, ze_command_queue_group_properties_t *pCommandQueueGroupProperties)

Retrieves command queue group properties of the device.

  • Properties are reported for each physical command queue type supported by the device.

  • Multiple calls to this function will return properties in the same order.

  • The order in which the properties are returned defines the command queue group’s ordinal.

  • The application may call this function from simultaneous threads.

  • The implementation of this function should be lock-free.

Remark

Analogues

  • vkGetPhysicalDeviceQueueFamilyProperties

Parameters

  • hDevice – [in] handle of the device

  • pCount – [in,out] pointer to the number of command queue group properties. if count is zero, then the driver shall update the value with the total number of command queue group properties available. if count is greater than the number of command queue group properties available, then the driver shall update the value with the correct number of command queue group properties available.

  • pCommandQueueGroupProperties – [in,out][optional][range(0, *pCount)] array of query results for command queue group properties. if count is less than the number of command queue group properties available, then driver shall only retrieve that number of command queue group properties.

Returns

zeDeviceGetMemoryProperties

ZE_APIEXPORT ze_result_t ZE_APICALL zeDeviceGetMemoryProperties(ze_device_handle_t hDevice, uint32_t *pCount, ze_device_memory_properties_t *pMemProperties)

Retrieves local memory properties of the device.

  • Properties are reported for each physical memory type supported by the device.

  • Multiple calls to this function will return properties in the same order.

  • The order in which the properties are returned defines the device’s local memory ordinal.

  • The application may call this function from simultaneous threads.

  • The implementation of this function should be lock-free.

Remark

Analogues

  • clGetDeviceInfo

Parameters

  • hDevice – [in] handle of the device

  • pCount – [in,out] pointer to the number of memory properties. if count is zero, then the driver shall update the value with the total number of memory properties available. if count is greater than the number of memory properties available, then the driver shall update the value with the correct number of memory properties available.

  • pMemProperties – [in,out][optional][range(0, *pCount)] array of query results for memory properties. if count is less than the number of memory properties available, then driver shall only retrieve that number of memory properties.

Returns

zeDeviceGetMemoryAccessProperties

ZE_APIEXPORT ze_result_t ZE_APICALL zeDeviceGetMemoryAccessProperties(ze_device_handle_t hDevice, ze_device_memory_access_properties_t *pMemAccessProperties)

Retrieves memory access properties of the device.

  • The application may call this function from simultaneous threads.

  • The implementation of this function should be lock-free.

Remark

Analogues

  • clGetDeviceInfo

Parameters

  • hDevice – [in] handle of the device

  • pMemAccessProperties – [in,out] query result for memory access properties

Returns

zeDeviceGetCacheProperties

ZE_APIEXPORT ze_result_t ZE_APICALL zeDeviceGetCacheProperties(ze_device_handle_t hDevice, uint32_t *pCount, ze_device_cache_properties_t *pCacheProperties)

Retrieves cache properties of the device.

  • The application may call this function from simultaneous threads.

  • The implementation of this function should be lock-free.

Remark

Analogues

  • clGetDeviceInfo

Parameters

  • hDevice – [in] handle of the device

  • pCount – [in,out] pointer to the number of cache properties. if count is zero, then the driver shall update the value with the total number of cache properties available. if count is greater than the number of cache properties available, then the driver shall update the value with the correct number of cache properties available.

  • pCacheProperties – [in,out][optional][range(0, *pCount)] array of query results for cache properties. if count is less than the number of cache properties available, then driver shall only retrieve that number of cache properties.

Returns

zeDeviceGetImageProperties

ZE_APIEXPORT ze_result_t ZE_APICALL zeDeviceGetImageProperties(ze_device_handle_t hDevice, ze_device_image_properties_t *pImageProperties)

Retrieves image properties of the device.

  • See zeImageGetProperties for format-specific capabilities.

  • The application may call this function from simultaneous threads.

  • The implementation of this function should be lock-free.

Parameters

  • hDevice – [in] handle of the device

  • pImageProperties – [in,out] query result for image properties

Returns

zeDeviceGetExternalMemoryProperties

ZE_APIEXPORT ze_result_t ZE_APICALL zeDeviceGetExternalMemoryProperties(ze_device_handle_t hDevice, ze_device_external_memory_properties_t *pExternalMemoryProperties)

Retrieves external memory import and export of the device.

  • The application may call this function from simultaneous threads.

  • The implementation of this function should be lock-free.

Parameters

  • hDevice – [in] handle of the device

  • pExternalMemoryProperties – [in,out] query result for external memory properties

Returns

zeDeviceGetP2PProperties

ZE_APIEXPORT ze_result_t ZE_APICALL zeDeviceGetP2PProperties(ze_device_handle_t hDevice, ze_device_handle_t hPeerDevice, ze_device_p2p_properties_t *pP2PProperties)

Retrieves peer-to-peer properties between one device and a peer devices.

  • The application may call this function from simultaneous threads.

  • The implementation of this function should be lock-free.

Parameters

  • hDevice – [in] handle of the device performing the access

  • hPeerDevice – [in] handle of the peer device with the allocation

  • pP2PProperties – [in,out] Peer-to-Peer properties between source and peer device

Returns

zeDeviceCanAccessPeer

ZE_APIEXPORT ze_result_t ZE_APICALL zeDeviceCanAccessPeer(ze_device_handle_t hDevice, ze_device_handle_t hPeerDevice, ze_bool_t *value)

Queries if one device can directly access peer device allocations.

  • Any device can access any other device within a node through a scale-up fabric.

  • The following are conditions for CanAccessPeer query.

    • If both device and peer device are the same then return true.

    • If both sub-device and peer sub-device are the same then return true.

    • If both are sub-devices and share the same parent device then return true.

    • If both device and remote device are connected by a direct or indirect scale-up fabric or over PCIe (same root complex or shared PCIe switch) then true.

    • If both sub-device and remote parent device (and vice-versa) are connected by a direct or indirect scale-up fabric or over PCIe (same root complex or shared PCIe switch) then true.

  • The application may call this function from simultaneous threads.

  • The implementation of this function should be lock-free.

Parameters

  • hDevice – [in] handle of the device performing the access

  • hPeerDevice – [in] handle of the peer device with the allocation

  • value – [out] returned access capability

Returns

zeDeviceGetStatus

ZE_APIEXPORT ze_result_t ZE_APICALL zeDeviceGetStatus(ze_device_handle_t hDevice)

Returns current status of the device.

  • Once a device is reset, this call will update the OS handle attached to the device handle.

  • The application may call this function from simultaneous threads with the same device handle.

  • The implementation of this function must be thread-safe.

Parameters

hDevice – [in] handle of the device

Returns

zeDeviceGetGlobalTimestamps

ZE_APIEXPORT ze_result_t ZE_APICALL zeDeviceGetGlobalTimestamps(ze_device_handle_t hDevice, uint64_t *hostTimestamp, uint64_t *deviceTimestamp)

Returns synchronized Host and device global timestamps.

  • The application may call this function from simultaneous threads with the same device handle.

  • The implementation of this function must be thread-safe.

Parameters

  • hDevice – [in] handle of the device

  • hostTimestamp – [out] value of the Host’s global timestamp that correlates with the Device’s global timestamp value

  • deviceTimestamp – [out] value of the Device’s global timestamp that correlates with the Host’s global timestamp value

Returns

Device Enums

ze_device_type_t

enum ze_device_type_t

Supported device types.

Values:

enumerator ZE_DEVICE_TYPE_GPU

Graphics Processing Unit.

enumerator ZE_DEVICE_TYPE_CPU

Central Processing Unit.

enumerator ZE_DEVICE_TYPE_FPGA

Field Programmable Gate Array.

enumerator ZE_DEVICE_TYPE_MCA

Memory Copy Accelerator.

enumerator ZE_DEVICE_TYPE_VPU

Vision Processing Unit.

enumerator ZE_DEVICE_TYPE_FORCE_UINT32

ze_device_property_flags_t

enum ze_device_property_flag_t

Values:

enumerator ZE_DEVICE_PROPERTY_FLAG_INTEGRATED

Device is integrated with the Host.

enumerator ZE_DEVICE_PROPERTY_FLAG_SUBDEVICE

Device handle used for query represents a sub-device.

enumerator ZE_DEVICE_PROPERTY_FLAG_ECC

Device supports error correction memory access.

enumerator ZE_DEVICE_PROPERTY_FLAG_ONDEMANDPAGING

Device supports on-demand page-faulting.

enumerator ZE_DEVICE_PROPERTY_FLAG_FORCE_UINT32

ze_device_module_flags_t

enum ze_device_module_flag_t

Values:

enumerator ZE_DEVICE_MODULE_FLAG_FP16

Device supports 16-bit floating-point operations.

enumerator ZE_DEVICE_MODULE_FLAG_FP64

Device supports 64-bit floating-point operations.

enumerator ZE_DEVICE_MODULE_FLAG_INT64_ATOMICS

Device supports 64-bit atomic operations.

enumerator ZE_DEVICE_MODULE_FLAG_DP4A

Device supports four component dot product and accumulate operations.

enumerator ZE_DEVICE_MODULE_FLAG_FORCE_UINT32

ze_device_fp_flags_t

enum ze_device_fp_flag_t

Values:

enumerator ZE_DEVICE_FP_FLAG_DENORM

Supports denorms.

enumerator ZE_DEVICE_FP_FLAG_INF_NAN

Supports INF and quiet NaNs.

enumerator ZE_DEVICE_FP_FLAG_ROUND_TO_NEAREST

Supports rounding to nearest even rounding mode.

enumerator ZE_DEVICE_FP_FLAG_ROUND_TO_ZERO

Supports rounding to zero.

enumerator ZE_DEVICE_FP_FLAG_ROUND_TO_INF

Supports rounding to both positive and negative INF.

enumerator ZE_DEVICE_FP_FLAG_FMA

Supports IEEE754-2008 fused multiply-add.

enumerator ZE_DEVICE_FP_FLAG_ROUNDED_DIVIDE_SQRT

Supports rounding as defined by IEEE754 for divide and sqrt operations.

enumerator ZE_DEVICE_FP_FLAG_SOFT_FLOAT

Uses software implementation for basic floating-point operations.

enumerator ZE_DEVICE_FP_FLAG_FORCE_UINT32

ze_command_queue_group_property_flags_t

enum ze_command_queue_group_property_flag_t

Values:

enumerator ZE_COMMAND_QUEUE_GROUP_PROPERTY_FLAG_COMPUTE

Command queue group supports enqueing compute commands.

enumerator ZE_COMMAND_QUEUE_GROUP_PROPERTY_FLAG_COPY

Command queue group supports enqueing copy commands.

enumerator ZE_COMMAND_QUEUE_GROUP_PROPERTY_FLAG_COOPERATIVE_KERNELS

Command queue group supports cooperative kernels. See zeCommandListAppendLaunchCooperativeKernel for more details.

enumerator ZE_COMMAND_QUEUE_GROUP_PROPERTY_FLAG_METRICS

Command queue groups supports metric queries.

enumerator ZE_COMMAND_QUEUE_GROUP_PROPERTY_FLAG_FORCE_UINT32

ze_device_memory_property_flags_t

enum ze_device_memory_property_flag_t

Values:

enumerator ZE_DEVICE_MEMORY_PROPERTY_FLAG_TBD

reserved for future use

enumerator ZE_DEVICE_MEMORY_PROPERTY_FLAG_FORCE_UINT32

ze_memory_access_cap_flags_t

enum ze_memory_access_cap_flag_t

Values:

enumerator ZE_MEMORY_ACCESS_CAP_FLAG_RW

Supports load/store access.

enumerator ZE_MEMORY_ACCESS_CAP_FLAG_ATOMIC

Supports atomic access.

enumerator ZE_MEMORY_ACCESS_CAP_FLAG_CONCURRENT

Supports concurrent access.

enumerator ZE_MEMORY_ACCESS_CAP_FLAG_CONCURRENT_ATOMIC

Supports concurrent atomic access.

enumerator ZE_MEMORY_ACCESS_CAP_FLAG_FORCE_UINT32

ze_device_cache_property_flags_t

enum ze_device_cache_property_flag_t

Values:

enumerator ZE_DEVICE_CACHE_PROPERTY_FLAG_USER_CONTROL

Device support User Cache Control (i.e. SLM section vs Generic Cache)

enumerator ZE_DEVICE_CACHE_PROPERTY_FLAG_FORCE_UINT32

ze_device_p2p_property_flags_t

enum ze_device_p2p_property_flag_t

Values:

enumerator ZE_DEVICE_P2P_PROPERTY_FLAG_ACCESS

Device supports access between peer devices.

enumerator ZE_DEVICE_P2P_PROPERTY_FLAG_ATOMICS

Device supports atomics between peer devices.

enumerator ZE_DEVICE_P2P_PROPERTY_FLAG_FORCE_UINT32

Device Structures

ze_device_uuid_t

struct ze_device_uuid_t

Device universal unique id (UUID)

Public Members

uint8_t id[ZE_MAX_DEVICE_UUID_SIZE]

[out] opaque data representing a device UUID

ze_device_properties_t

struct ze_device_properties_t

Device properties queried using zeDeviceGetProperties.

Public Members

ze_structure_type_t stype

[in] type of this structure

void *pNext

[in,out][optional] must be null or a pointer to an extension-specific structure (i.e. contains stype and pNext).

ze_device_type_t type

[out] generic device type

uint32_t vendorId

[out] vendor id from PCI configuration

uint32_t deviceId

[out] device id from PCI configuration Note, the device id uses little-endian format.

ze_device_property_flags_t flags

[out] 0 (none) or a valid combination of ze_device_property_flag_t

uint32_t subdeviceId

[out] sub-device id. Only valid if ZE_DEVICE_PROPERTY_FLAG_SUBDEVICE is set.

uint32_t coreClockRate

[out] Clock rate for device core.

uint64_t maxMemAllocSize

[out] Maximum memory allocation size.

uint32_t maxHardwareContexts

[out] Maximum number of logical hardware contexts.

uint32_t maxCommandQueuePriority

[out] Maximum priority for command queues. Higher value is higher priority.

uint32_t numThreadsPerEU

[out] Maximum number of threads per EU.

uint32_t physicalEUSimdWidth

[out] The physical EU simd width.

uint32_t numEUsPerSubslice

[out] Maximum number of EUs per sub-slice.

uint32_t numSubslicesPerSlice

[out] Maximum number of sub-slices per slice.

uint32_t numSlices

[out] Maximum number of slices.

uint64_t timerResolution

[out] Returns the resolution of device timer used for profiling, timestamps, etc. When stype==ZE_STRUCTURE_TYPE_DEVICE_PROPERTIES the units are in nanoseconds. When stype==ZE_STRUCTURE_TYPE_DEVICE_PROPERTIES_1_2 units are in cycles/sec

uint32_t timestampValidBits

[out] Returns the number of valid bits in the timestamp value.

uint32_t kernelTimestampValidBits

[out] Returns the number of valid bits in the kernel timestamp values

ze_device_uuid_t uuid

[out] universal unique identifier. Note: Subdevices will have their own uuid.

char name[ZE_MAX_DEVICE_NAME]

[out] Device name

ze_device_thread_t

struct ze_device_thread_t

Device thread identifier.

Public Members

uint32_t slice

[in,out] the slice number. Must be UINT32_MAX (all) or less than the numSlices member of ze_device_properties_t.

uint32_t subslice

[in,out] the sub-slice number within its slice. Must be UINT32_MAX (all) or less than the numSubslicesPerSlice member of ze_device_properties_t.

uint32_t eu

[in,out] the EU number within its sub-slice. Must be UINT32_MAX (all) or less than the numEUsPerSubslice member of ze_device_properties_t.

uint32_t thread

[in,out] the thread number within its EU. Must be UINT32_MAX (all) or less than the numThreadsPerEU member of ze_device_properties_t.

ze_device_compute_properties_t

struct ze_device_compute_properties_t

Device compute properties queried using zeDeviceGetComputeProperties.

Public Members

ze_structure_type_t stype

[in] type of this structure

void *pNext

[in,out][optional] must be null or a pointer to an extension-specific structure (i.e. contains stype and pNext).

uint32_t maxTotalGroupSize

[out] Maximum items per compute group. (groupSizeX * groupSizeY * groupSizeZ) <= maxTotalGroupSize

uint32_t maxGroupSizeX

[out] Maximum items for X dimension in group

uint32_t maxGroupSizeY

[out] Maximum items for Y dimension in group

uint32_t maxGroupSizeZ

[out] Maximum items for Z dimension in group

uint32_t maxGroupCountX

[out] Maximum groups that can be launched for x dimension

uint32_t maxGroupCountY

[out] Maximum groups that can be launched for y dimension

uint32_t maxGroupCountZ

[out] Maximum groups that can be launched for z dimension

uint32_t maxSharedLocalMemory

[out] Maximum shared local memory per group.

uint32_t numSubGroupSizes

[out] Number of subgroup sizes supported. This indicates number of entries in subGroupSizes.

uint32_t subGroupSizes[ZE_SUBGROUPSIZE_COUNT]

[out] Size group sizes supported.

ze_native_kernel_uuid_t

struct ze_native_kernel_uuid_t

Native kernel universal unique id (UUID)

Public Members

uint8_t id[ZE_MAX_NATIVE_KERNEL_UUID_SIZE]

[out] opaque data representing a native kernel UUID

ze_device_module_properties_t

struct ze_device_module_properties_t

Device module properties queried using zeDeviceGetModuleProperties.

Public Members

ze_structure_type_t stype

[in] type of this structure

void *pNext

[in,out][optional] must be null or a pointer to an extension-specific structure (i.e. contains stype and pNext).

uint32_t spirvVersionSupported

[out] Maximum supported SPIR-V version. Returns zero if SPIR-V is not supported. Contains major and minor attributes, use ZE_MAJOR_VERSION and ZE_MINOR_VERSION.

ze_device_module_flags_t flags

[out] 0 or a valid combination of ze_device_module_flag_t

ze_device_fp_flags_t fp16flags

[out] Capabilities for half-precision floating-point operations. returns 0 (if ZE_DEVICE_MODULE_FLAG_FP16 is not set) or a combination of ze_device_fp_flag_t.

ze_device_fp_flags_t fp32flags

[out] Capabilities for single-precision floating-point operations. returns a combination of ze_device_fp_flag_t.

ze_device_fp_flags_t fp64flags

[out] Capabilities for double-precision floating-point operations. returns 0 (if ZE_DEVICE_MODULE_FLAG_FP64 is not set) or a combination of ze_device_fp_flag_t.

uint32_t maxArgumentsSize

[out] Maximum kernel argument size that is supported.

uint32_t printfBufferSize

[out] Maximum size of internal buffer that holds output of printf calls from kernel.

ze_native_kernel_uuid_t nativeKernelSupported

[out] Compatibility UUID of supported native kernel. UUID may or may not be the same across driver release, devices, or operating systems. Application is responsible for ensuring UUID matches before creating module using previously created native kernel.

ze_command_queue_group_properties_t

struct ze_command_queue_group_properties_t

Command queue group properties queried using zeDeviceGetCommandQueueGroupProperties.

Public Members

ze_structure_type_t stype

[in] type of this structure

void *pNext

[in,out][optional] must be null or a pointer to an extension-specific structure (i.e. contains stype and pNext).

ze_command_queue_group_property_flags_t flags

[out] 0 (none) or a valid combination of ze_command_queue_group_property_flag_t

size_t maxMemoryFillPatternSize

[out] maximum pattern_size supported by command queue group. See zeCommandListAppendMemoryFill for more details.

uint32_t numQueues

[out] the number of physical engines within the group.

ze_device_memory_properties_t

struct ze_device_memory_properties_t

Device local memory properties queried using zeDeviceGetMemoryProperties.

Public Members

ze_structure_type_t stype

[in] type of this structure

void *pNext

[in,out][optional] must be null or a pointer to an extension-specific structure (i.e. contains stype and pNext).

ze_device_memory_property_flags_t flags

[out] 0 (none) or a valid combination of ze_device_memory_property_flag_t

uint32_t maxClockRate

[out] Maximum clock rate for device memory.

uint32_t maxBusWidth

[out] Maximum bus width between device and memory.

uint64_t totalSize

[out] Total memory size in bytes that is available to the device.

char name[ZE_MAX_DEVICE_NAME]

[out] Memory name

ze_device_memory_access_properties_t

struct ze_device_memory_access_properties_t

Device memory access properties queried using zeDeviceGetMemoryAccessProperties.

Public Members

ze_structure_type_t stype

[in] type of this structure

void *pNext

[in,out][optional] must be null or a pointer to an extension-specific structure (i.e. contains stype and pNext).

ze_memory_access_cap_flags_t hostAllocCapabilities

[out] host memory capabilities. returns 0 (unsupported) or a combination of ze_memory_access_cap_flag_t.

ze_memory_access_cap_flags_t deviceAllocCapabilities

[out] device memory capabilities. returns 0 (unsupported) or a combination of ze_memory_access_cap_flag_t.

ze_memory_access_cap_flags_t sharedSingleDeviceAllocCapabilities

[out] shared, single-device memory capabilities. returns 0 (unsupported) or a combination of ze_memory_access_cap_flag_t.

ze_memory_access_cap_flags_t sharedCrossDeviceAllocCapabilities

[out] shared, cross-device memory capabilities. returns 0 (unsupported) or a combination of ze_memory_access_cap_flag_t.

ze_memory_access_cap_flags_t sharedSystemAllocCapabilities

[out] shared, system memory capabilities. returns 0 (unsupported) or a combination of ze_memory_access_cap_flag_t.

ze_device_cache_properties_t

struct ze_device_cache_properties_t

Device cache properties queried using zeDeviceGetCacheProperties.

Public Members

ze_structure_type_t stype

[in] type of this structure

void *pNext

[in,out][optional] must be null or a pointer to an extension-specific structure (i.e. contains stype and pNext).

ze_device_cache_property_flags_t flags

[out] 0 (none) or a valid combination of ze_device_cache_property_flag_t

size_t cacheSize

[out] Per-cache size, in bytes

ze_device_image_properties_t

struct ze_device_image_properties_t

Device image properties queried using zeDeviceGetImageProperties.

Public Members

ze_structure_type_t stype

[in] type of this structure

void *pNext

[in,out][optional] must be null or a pointer to an extension-specific structure (i.e. contains stype and pNext).

uint32_t maxImageDims1D

[out] Maximum image dimensions for 1D resources. if 0, then 1D images are unsupported.

uint32_t maxImageDims2D

[out] Maximum image dimensions for 2D resources. if 0, then 2D images are unsupported.

uint32_t maxImageDims3D

[out] Maximum image dimensions for 3D resources. if 0, then 3D images are unsupported.

uint64_t maxImageBufferSize

[out] Maximum image buffer size in bytes. if 0, then buffer images are unsupported.

uint32_t maxImageArraySlices

[out] Maximum image array slices. if 0, then image arrays are unsupported.

uint32_t maxSamplers

[out] Max samplers that can be used in kernel. if 0, then sampling is unsupported.

uint32_t maxReadImageArgs

[out] Returns the maximum number of simultaneous image objects that can be read from by a kernel. if 0, then reading images is unsupported.

uint32_t maxWriteImageArgs

[out] Returns the maximum number of simultaneous image objects that can be written to by a kernel. if 0, then writing images is unsupported.

ze_device_external_memory_properties_t

struct ze_device_external_memory_properties_t

Device external memory import and export properties.

Public Members

ze_structure_type_t stype

[in] type of this structure

void *pNext

[in,out][optional] must be null or a pointer to an extension-specific structure (i.e. contains stype and pNext).

ze_external_memory_type_flags_t memoryAllocationImportTypes

[out] Supported external memory import types for memory allocations.

ze_external_memory_type_flags_t memoryAllocationExportTypes

[out] Supported external memory export types for memory allocations.

ze_external_memory_type_flags_t imageImportTypes

[out] Supported external memory import types for images.

ze_external_memory_type_flags_t imageExportTypes

[out] Supported external memory export types for images.

ze_device_p2p_properties_t

struct ze_device_p2p_properties_t

Device peer-to-peer properties queried using zeDeviceGetP2PProperties.

Public Members

ze_structure_type_t stype

[in] type of this structure

void *pNext

[in,out][optional] must be null or a pointer to an extension-specific structure (i.e. contains stype and pNext).

ze_device_p2p_property_flags_t flags

[out] 0 (none) or a valid combination of ze_device_p2p_property_flag_t

Context

Context Functions

zeContextCreate

ZE_APIEXPORT ze_result_t ZE_APICALL zeContextCreate(ze_driver_handle_t hDriver, const ze_context_desc_t *desc, ze_context_handle_t *phContext)

Creates a context for the driver.

  • The application must only use the context for the driver which was provided during creation.

  • The application may call this function from simultaneous threads.

  • The implementation of this function must be thread-safe.

Parameters

  • hDriver – [in] handle of the driver object

  • desc – [in] pointer to context descriptor

  • phContext – [out] pointer to handle of context object created

Returns

zeContextCreateEx

ZE_APIEXPORT ze_result_t ZE_APICALL zeContextCreateEx(ze_driver_handle_t hDriver, const ze_context_desc_t *desc, uint32_t numDevices, ze_device_handle_t *phDevices, ze_context_handle_t *phContext)

Creates a context for the driver.

  • The application must only use the context for the driver which was provided during creation.

  • The application may call this function from simultaneous threads.

  • The implementation of this function must be thread-safe.

Parameters

  • hDriver – [in] handle of the driver object

  • desc – [in] pointer to context descriptor

  • numDevices – [in][optional] number of device handles; must be 0 if nullptr == phDevices

  • phDevices – [in][optional][range(0, numDevices)] array of device handles which context has visibility. if nullptr, then all devices and any sub-devices supported by the driver instance are visible to the context. otherwise, the context only has visibility to the devices and any sub-devices of the devices in this array.

  • phContext – [out] pointer to handle of context object created

Returns

zeContextDestroy

ZE_APIEXPORT ze_result_t ZE_APICALL zeContextDestroy(ze_context_handle_t hContext)

Destroys a context.

  • The application must ensure the device is not currently referencing the context before it is deleted.

  • The implementation of this function may immediately free all Host and Device allocations associated with this context.

  • The application must not call this function from simultaneous threads with the same context handle.

  • The implementation of this function must be thread-safe.

Parameters

hContext – [in][release] handle of context object to destroy

Returns

zeContextGetStatus

ZE_APIEXPORT ze_result_t ZE_APICALL zeContextGetStatus(ze_context_handle_t hContext)

Returns current status of the context.

  • The application may call this function from simultaneous threads with the same context handle.

  • The implementation of this function should be lock-free.

Parameters

hContext – [in] handle of context object

Returns

Context Enums

ze_context_flags_t

enum ze_context_flag_t

Values:

enumerator ZE_CONTEXT_FLAG_TBD

reserved for future use

enumerator ZE_CONTEXT_FLAG_FORCE_UINT32

Context Structures

ze_context_desc_t

struct ze_context_desc_t

Context descriptor.

Public Members

ze_structure_type_t stype

[in] type of this structure

const void *pNext

[in][optional] must be null or a pointer to an extension-specific structure (i.e. contains stype and pNext).

ze_context_flags_t flags

[in] creation flags. must be 0 (default) or a valid combination of ze_context_flag_t; default behavior may use implicit driver-based heuristics.

Cmdqueue

Cmdqueue Functions

zeCommandQueueCreate

ZE_APIEXPORT ze_result_t ZE_APICALL zeCommandQueueCreate(ze_context_handle_t hContext, ze_device_handle_t hDevice, const ze_command_queue_desc_t *desc, ze_command_queue_handle_t *phCommandQueue)

Creates a command queue on the context.

  • A command queue represents a logical input stream to the device, tied to a physical input stream.

  • The application must only use the command queue for the device, or its sub-devices, which was provided during creation.

  • The application may call this function from simultaneous threads.

  • The implementation of this function must be thread-safe.

Remark

Analogues

  • clCreateCommandQueue

Parameters

  • hContext – [in] handle of the context object

  • hDevice – [in] handle of the device object

  • desc – [in] pointer to command queue descriptor

  • phCommandQueue – [out] pointer to handle of command queue object created

Returns

zeCommandQueueDestroy

ZE_APIEXPORT ze_result_t ZE_APICALL zeCommandQueueDestroy(ze_command_queue_handle_t hCommandQueue)

Destroys a command queue.

  • The application must destroy all fence handles created from the command queue before destroying the command queue itself

  • The application must ensure the device is not currently referencing the command queue before it is deleted

  • The implementation of this function may immediately free all Host and Device allocations associated with this command queue

  • The application must not call this function from simultaneous threads with the same command queue handle.

  • The implementation of this function must be thread-safe.

Remark

Analogues

  • clReleaseCommandQueue

Parameters

hCommandQueue – [in][release] handle of command queue object to destroy

Returns

zeCommandQueueExecuteCommandLists

ZE_APIEXPORT ze_result_t ZE_APICALL zeCommandQueueExecuteCommandLists(ze_command_queue_handle_t hCommandQueue, uint32_t numCommandLists, ze_command_list_handle_t *phCommandLists, ze_fence_handle_t hFence)

Executes a command list in a command queue.

  • The command lists are submitted to the device in the order they are received, whether from multiple calls (on the same or different threads) or a single call with multiple command lists.

  • The application must ensure the command lists are accessible by the device on which the command queue was created.

  • The application must ensure the device is not currently referencing the command list since the implementation is allowed to modify the contents of the command list for submission.

  • The application must only execute command lists created with an identical command queue group ordinal to the command queue.

  • The application must use a fence created using the same command queue.

  • The application must ensure the command queue, command list and fence were created on the same context.

  • The application must ensure the command lists being executed are not immediate command lists.

  • The application may call this function from simultaneous threads.

  • The implementation of this function should be lock-free.

Remark

Analogues

  • vkQueueSubmit

Parameters

  • hCommandQueue – [in] handle of the command queue

  • numCommandLists – [in] number of command lists to execute

  • phCommandLists – [in][range(0, numCommandLists)] list of handles of the command lists to execute

  • hFence – [in][optional] handle of the fence to signal on completion

Returns

zeCommandQueueSynchronize

ZE_APIEXPORT ze_result_t ZE_APICALL zeCommandQueueSynchronize(ze_command_queue_handle_t hCommandQueue, uint64_t timeout)

Synchronizes a command queue by waiting on the host.

  • The application may call this function from simultaneous threads.

  • The implementation of this function should be lock-free.

Parameters

  • hCommandQueue – [in] handle of the command queue

  • timeout – [in] if non-zero, then indicates the maximum time (in nanoseconds) to yield before returning ZE_RESULT_SUCCESS or ZE_RESULT_NOT_READY; if zero, then immediately returns the status of the command queue; if UINT64_MAX, then function will not return until complete or device is lost. Due to external dependencies, timeout may be rounded to the closest value allowed by the accuracy of those dependencies.

Returns

Cmdqueue Enums

ze_command_queue_flags_t

enum ze_command_queue_flag_t

Values:

enumerator ZE_COMMAND_QUEUE_FLAG_EXPLICIT_ONLY

command queue should be optimized for submission to a single device engine. driver must disable any implicit optimizations for distributing work across multiple engines. this flag should be used when applications want full control over multi-engine submission and scheduling.

enumerator ZE_COMMAND_QUEUE_FLAG_IN_ORDER

To be used only when creating immediate command lists. Commands appended to the immediate command list are executed in-order, with driver implementation enforcing dependencies between them. Application is not required to have the signal event of a given command being the wait event of the next to define an in-order list, and application is allowed to pass signal and wait events to each appended command to implement more complex dependency graphs.

enumerator ZE_COMMAND_QUEUE_FLAG_FORCE_UINT32

ze_command_queue_mode_t

enum ze_command_queue_mode_t

Supported command queue modes.

Values:

enumerator ZE_COMMAND_QUEUE_MODE_DEFAULT

implicit default behavior; uses driver-based heuristics

enumerator ZE_COMMAND_QUEUE_MODE_SYNCHRONOUS

Device execution always completes immediately on execute; Host thread is blocked using wait on implicit synchronization object

enumerator ZE_COMMAND_QUEUE_MODE_ASYNCHRONOUS

Device execution is scheduled and will complete in future; explicit synchronization object must be used to determine completeness

enumerator ZE_COMMAND_QUEUE_MODE_FORCE_UINT32

ze_command_queue_priority_t

enum ze_command_queue_priority_t

Supported command queue priorities.

Values:

enumerator ZE_COMMAND_QUEUE_PRIORITY_NORMAL

[default] normal priority

enumerator ZE_COMMAND_QUEUE_PRIORITY_PRIORITY_LOW

lower priority than normal

enumerator ZE_COMMAND_QUEUE_PRIORITY_PRIORITY_HIGH

higher priority than normal

enumerator ZE_COMMAND_QUEUE_PRIORITY_FORCE_UINT32

Cmdqueue Structures

ze_command_queue_desc_t

struct ze_command_queue_desc_t

Command Queue descriptor.

Public Members

ze_structure_type_t stype

[in] type of this structure

const void *pNext

[in][optional] must be null or a pointer to an extension-specific structure (i.e. contains stype and pNext).

uint32_t ordinal

[in] command queue group ordinal

uint32_t index

[in] command queue index within the group; must be zero if ZE_COMMAND_QUEUE_FLAG_EXPLICIT_ONLY is not set

ze_command_queue_flags_t flags

[in] usage flags. must be 0 (default) or a valid combination of ze_command_queue_flag_t; default behavior may use implicit driver-based heuristics to balance latency and throughput.

ze_command_queue_mode_t mode

[in] operation mode

ze_command_queue_priority_t priority

[in] priority

Cmdlist

Cmdlist Functions

zeCommandListCreate

ZE_APIEXPORT ze_result_t ZE_APICALL zeCommandListCreate(ze_context_handle_t hContext, ze_device_handle_t hDevice, const ze_command_list_desc_t *desc, ze_command_list_handle_t *phCommandList)

Creates a command list on the context.

  • A command list represents a sequence of commands for execution on a command queue.

  • The command list is created in the ‘open’ state.

  • The application must only use the command list for the device, or its sub-devices, which was provided during creation.

  • The application may call this function from simultaneous threads.

  • The implementation of this function must be thread-safe.

Parameters

  • hContext – [in] handle of the context object

  • hDevice – [in] handle of the device object

  • desc – [in] pointer to command list descriptor

  • phCommandList – [out] pointer to handle of command list object created

Returns

zeCommandListCreateImmediate

ZE_APIEXPORT ze_result_t ZE_APICALL zeCommandListCreateImmediate(ze_context_handle_t hContext, ze_device_handle_t hDevice, const ze_command_queue_desc_t *altdesc, ze_command_list_handle_t *phCommandList)

Creates an immediate command list on the context.

  • An immediate command list is used for low-latency submission of commands.

  • An immediate command list creates an implicit command queue.

  • Immediate command lists must not be passed to zeCommandQueueExecuteCommandLists.

  • Commands appended into an immediate command list may execute synchronously, by blocking until the command is complete.

  • The command list is created in the ‘open’ state and never needs to be closed.

  • The application must only use the command list for the device, or its sub-devices, which was provided during creation.

  • The application may call this function from simultaneous threads.

  • The implementation of this function must be thread-safe.

Parameters

  • hContext – [in] handle of the context object

  • hDevice – [in] handle of the device object

  • altdesc – [in] pointer to command queue descriptor

  • phCommandList – [out] pointer to handle of command list object created

Returns

zeCommandListDestroy

ZE_APIEXPORT ze_result_t ZE_APICALL zeCommandListDestroy(ze_command_list_handle_t hCommandList)

Destroys a command list.

  • The application must ensure the device is not currently referencing the command list before it is deleted.

  • The implementation of this function may immediately free all Host and Device allocations associated with this command list.

  • The application must not call this function from simultaneous threads with the same command list handle.

  • The implementation of this function must be thread-safe.

Parameters

hCommandList – [in][release] handle of command list object to destroy

Returns

zeCommandListClose

ZE_APIEXPORT ze_result_t ZE_APICALL zeCommandListClose(ze_command_list_handle_t hCommandList)

Closes a command list; ready to be executed by a command queue.

  • The application must not call this function from simultaneous threads with the same command list handle.

  • The implementation of this function should be lock-free.

Parameters

hCommandList – [in] handle of command list object to close

Returns

zeCommandListReset

ZE_APIEXPORT ze_result_t ZE_APICALL zeCommandListReset(ze_command_list_handle_t hCommandList)

Reset a command list to initial (empty) state; ready for appending commands.

  • The application must ensure the device is not currently referencing the command list before it is reset

  • The application must not call this function from simultaneous threads with the same command list handle.

  • The implementation of this function should be lock-free.

Parameters

hCommandList – [in] handle of command list object to reset

Returns

zeCommandListAppendWriteGlobalTimestamp

ZE_APIEXPORT ze_result_t ZE_APICALL zeCommandListAppendWriteGlobalTimestamp(ze_command_list_handle_t hCommandList, uint64_t *dstptr, ze_event_handle_t hSignalEvent, uint32_t numWaitEvents, ze_event_handle_t *phWaitEvents)

Appends a memory write of the device’s global timestamp value into a command list.

  • The application must ensure the events are accessible by the device on which the command list was created.

  • The timestamp frequency can be queried from the timerResolution member of ze_device_properties_t.

  • The number of valid bits in the timestamp value can be queried from the timestampValidBits member of ze_device_properties_t.

  • The application must ensure the memory pointed to by dstptr is accessible by the device on which the command list was created.

  • The application must ensure the command list and events were created, and the memory was allocated, on the same context.

  • The application must not call this function from simultaneous threads with the same command list handle.

  • The implementation of this function should be lock-free.

Parameters

  • hCommandList – [in] handle of the command list

  • dstptr – [in,out] pointer to memory where timestamp value will be written; must be 8byte-aligned.

  • hSignalEvent – [in][optional] handle of the event to signal on completion

  • numWaitEvents – [in][optional] number of events to wait on before executing query; must be 0 if nullptr == phWaitEvents

  • phWaitEvents – [in][optional][range(0, numWaitEvents)] handle of the events to wait on before executing query

Returns

zeCommandListHostSynchronize

ZE_APIEXPORT ze_result_t ZE_APICALL zeCommandListHostSynchronize(ze_command_list_handle_t hCommandList, uint64_t timeout)

Synchronizes an immediate command list by waiting on the host for the completion of all commands previously submitted to it.

  • The application must call this function only with command lists created with zeCommandListCreateImmediate.

  • Waiting on one immediate command list shall not block the concurrent execution of commands appended to other immediate command lists created with either a different ordinal or different index.

  • The application may call this function from simultaneous threads.

  • The implementation of this function should be lock-free.

Parameters

  • hCommandList – [in] handle of the immediate command list

  • timeout – [in] if non-zero, then indicates the maximum time (in nanoseconds) to yield before returning ZE_RESULT_SUCCESS or ZE_RESULT_NOT_READY; if zero, then immediately returns the status of the immediate command list; if UINT64_MAX, then function will not return until complete or device is lost. Due to external dependencies, timeout may be rounded to the closest value allowed by the accuracy of those dependencies.

Returns

Cmdlist Enums

ze_command_list_flags_t

enum ze_command_list_flag_t

Values:

enumerator ZE_COMMAND_LIST_FLAG_RELAXED_ORDERING

driver may reorder commands (e.g., kernels, copies) between barriers and synchronization primitives. using this flag may increase Host overhead of zeCommandListClose. therefore, this flag should not be set for low-latency usage-models.

enumerator ZE_COMMAND_LIST_FLAG_MAXIMIZE_THROUGHPUT

driver may perform additional optimizations that increase execution throughput. using this flag may increase Host overhead of zeCommandListClose and zeCommandQueueExecuteCommandLists. therefore, this flag should not be set for low-latency usage-models.

enumerator ZE_COMMAND_LIST_FLAG_EXPLICIT_ONLY

command list should be optimized for submission to a single command queue and device engine. driver must disable any implicit optimizations for distributing work across multiple engines. this flag should be used when applications want full control over multi-engine submission and scheduling.

enumerator ZE_COMMAND_LIST_FLAG_IN_ORDER

commands appended to this command list are executed in-order, with driver implementation enforcing dependencies between them. Application is not required to have the signal event of a given command being the wait event of the next to define an in-order list, and application is allowed to pass signal and wait events to each appended command to implement more complex dependency graphs. Cannot be combined with ZE_COMMAND_LIST_FLAG_RELAXED_ORDERING.

enumerator ZE_COMMAND_LIST_FLAG_FORCE_UINT32

Cmdlist Structures

ze_command_list_desc_t

struct ze_command_list_desc_t

Command List descriptor.

Public Members

ze_structure_type_t stype

[in] type of this structure

const void *pNext

[in][optional] must be null or a pointer to an extension-specific structure (i.e. contains stype and pNext).

uint32_t commandQueueGroupOrdinal

[in] command queue group ordinal to which this command list will be submitted

ze_command_list_flags_t flags

[in] usage flags. must be 0 (default) or a valid combination of ze_command_list_flag_t; default behavior may use implicit driver-based heuristics to balance latency and throughput.

Barrier

Barrier Functions

zeCommandListAppendBarrier

ZE_APIEXPORT ze_result_t ZE_APICALL zeCommandListAppendBarrier(ze_command_list_handle_t hCommandList, ze_event_handle_t hSignalEvent, uint32_t numWaitEvents, ze_event_handle_t *phWaitEvents)

Appends an execution and global memory barrier into a command list.

  • The application must ensure the events are accessible by the device on which the command list was created.

  • If numWaitEvents is zero, then all previous commands, enqueued on same command queue, must complete prior to the execution of the barrier. This is not the case when numWaitEvents is non-zero.

  • If numWaitEvents is non-zero, then only all phWaitEvents must be signaled prior to the execution of the barrier.

  • This command blocks all following commands from beginning until the execution of the barrier completes.

  • The application must not call this function from simultaneous threads with the same command list handle.

  • The implementation of this function should be lock-free.

Remark

Analogues

  • vkCmdPipelineBarrier

  • clEnqueueBarrierWithWaitList

Parameters

  • hCommandList – [in] handle of the command list

  • hSignalEvent – [in][optional] handle of the event to signal on completion

  • numWaitEvents – [in][optional] number of events to wait on before executing barrier; must be 0 if nullptr == phWaitEvents

  • phWaitEvents – [in][optional][range(0, numWaitEvents)] handle of the events to wait on before executing barrier

Returns

zeCommandListAppendMemoryRangesBarrier

ZE_APIEXPORT ze_result_t ZE_APICALL zeCommandListAppendMemoryRangesBarrier(ze_command_list_handle_t hCommandList, uint32_t numRanges, const size_t *pRangeSizes, const void **pRanges, ze_event_handle_t hSignalEvent, uint32_t numWaitEvents, ze_event_handle_t *phWaitEvents)

Appends a global memory ranges barrier into a command list.

  • The application must ensure the events are accessible by the device on which the command list was created.

  • If numWaitEvents is zero, then all previous commands are completed prior to the execution of the barrier.

  • If numWaitEvents is non-zero, then then all phWaitEvents must be signaled prior to the execution of the barrier.

  • This command blocks all following commands from beginning until the execution of the barrier completes.

  • The application must not call this function from simultaneous threads with the same command list handle.

  • The implementation of this function should be lock-free.

Parameters

  • hCommandList – [in] handle of the command list

  • numRanges – [in] number of memory ranges

  • pRangeSizes – [in][range(0, numRanges)] array of sizes of memory range

  • pRanges – [in][range(0, numRanges)] array of memory ranges

  • hSignalEvent – [in][optional] handle of the event to signal on completion

  • numWaitEvents – [in][optional] number of events to wait on before executing barrier; must be 0 if nullptr == phWaitEvents

  • phWaitEvents – [in][optional][range(0, numWaitEvents)] handle of the events to wait on before executing barrier

Returns

zeContextSystemBarrier

ZE_APIEXPORT ze_result_t ZE_APICALL zeContextSystemBarrier(ze_context_handle_t hContext, ze_device_handle_t hDevice)

Ensures in-bound writes to the device are globally observable.

  • This is a special-case system level barrier that can be used to ensure global observability of writes; typically needed after a producer (e.g., NIC) performs direct writes to the device’s memory (e.g., Direct RDMA writes). This is typically required when the memory corresponding to the writes is subsequently accessed from a remote device.

  • The application may call this function from simultaneous threads.

  • The implementation of this function should be lock-free.

Parameters

  • hContext – [in] handle of context object

  • hDevice – [in] handle of the device

Returns

Copy

Copy Functions

zeCommandListAppendMemoryCopy

ZE_APIEXPORT ze_result_t ZE_APICALL zeCommandListAppendMemoryCopy(ze_command_list_handle_t hCommandList, void *dstptr, const void *srcptr, size_t size, ze_event_handle_t hSignalEvent, uint32_t numWaitEvents, ze_event_handle_t *phWaitEvents)

Copies host, device, or shared memory.

  • The application must ensure the memory pointed to by dstptr and srcptr is accessible by the device on which the command list was created.

  • The implementation must not access the memory pointed to by dstptr and srcptr as they are free to be modified by either the Host or device up until execution.

  • The application must ensure the events are accessible by the device on which the command list was created.

  • The application must ensure the command list and events were created, and the memory was allocated, on the same context.

  • The application must not call this function from simultaneous threads with the same command list handle.

  • The implementation of this function should be lock-free.

Remark

Analogues

  • clEnqueueCopyBuffer

  • clEnqueueReadBuffer

  • clEnqueueWriteBuffer

  • clEnqueueSVMMemcpy

Parameters

  • hCommandList – [in] handle of command list

  • dstptr – [in] pointer to destination memory to copy to

  • srcptr – [in] pointer to source memory to copy from

  • size – [in] size in bytes to copy

  • hSignalEvent – [in][optional] handle of the event to signal on completion

  • numWaitEvents – [in][optional] number of events to wait on before launching; must be 0 if nullptr == phWaitEvents

  • phWaitEvents – [in][optional][range(0, numWaitEvents)] handle of the events to wait on before launching

Returns

zeCommandListAppendMemoryFill

ZE_APIEXPORT ze_result_t ZE_APICALL zeCommandListAppendMemoryFill(ze_command_list_handle_t hCommandList, void *ptr, const void *pattern, size_t pattern_size, size_t size, ze_event_handle_t hSignalEvent, uint32_t numWaitEvents, ze_event_handle_t *phWaitEvents)

Initializes host, device, or shared memory.

  • The application must ensure the memory pointed to by dstptr is accessible by the device on which the command list was created.

  • The implementation must not access the memory pointed to by dstptr as it is free to be modified by either the Host or device up until execution.

  • The value to initialize memory to is described by the pattern and the pattern size.

  • The pattern size must be a power-of-two and less than or equal to the maxMemoryFillPatternSize member of ze_command_queue_group_properties_t.

  • The application must ensure the events are accessible by the device on which the command list was created.

  • The application must ensure the command list and events were created, and the memory was allocated, on the same context.

  • The application must not call this function from simultaneous threads with the same command list handle.

  • The implementation of this function should be lock-free.

Remark

Analogues

  • clEnqueueFillBuffer

  • clEnqueueSVMMemFill

Parameters

  • hCommandList – [in] handle of command list

  • ptr – [in] pointer to memory to initialize

  • pattern – [in] pointer to value to initialize memory to

  • pattern_size – [in] size in bytes of the value to initialize memory to

  • size – [in] size in bytes to initialize

  • hSignalEvent – [in][optional] handle of the event to signal on completion

  • numWaitEvents – [in][optional] number of events to wait on before launching; must be 0 if nullptr == phWaitEvents

  • phWaitEvents – [in][optional][range(0, numWaitEvents)] handle of the events to wait on before launching

Returns

zeCommandListAppendMemoryCopyRegion

ZE_APIEXPORT ze_result_t ZE_APICALL zeCommandListAppendMemoryCopyRegion(ze_command_list_handle_t hCommandList, void *dstptr, const ze_copy_region_t *dstRegion, uint32_t dstPitch, uint32_t dstSlicePitch, const void *srcptr, const ze_copy_region_t *srcRegion, uint32_t srcPitch, uint32_t srcSlicePitch, ze_event_handle_t hSignalEvent, uint32_t numWaitEvents, ze_event_handle_t *phWaitEvents)

Copies a region from a 2D or 3D array of host, device, or shared memory.

  • The application must ensure the memory pointed to by dstptr and srcptr is accessible by the device on which the command list was created.

  • The implementation must not access the memory pointed to by dstptr and srcptr as they are free to be modified by either the Host or device up until execution.

  • The region width, height, and depth for both src and dst must be same. The origins can be different.

  • The src and dst regions cannot be overlapping.

  • The application must ensure the events are accessible by the device on which the command list was created.

  • The application must ensure the command list and events were created, and the memory was allocated, on the same context.

  • The application must not call this function from simultaneous threads with the same command list handle.

  • The implementation of this function should be lock-free.

Parameters

  • hCommandList – [in] handle of command list

  • dstptr – [in] pointer to destination memory to copy to

  • dstRegion – [in] pointer to destination region to copy to

  • dstPitch – [in] destination pitch in bytes

  • dstSlicePitch – [in] destination slice pitch in bytes. This is required for 3D region copies where the depth member of ze_copy_region_t is not 0, otherwise it’s ignored.

  • srcptr – [in] pointer to source memory to copy from

  • srcRegion – [in] pointer to source region to copy from

  • srcPitch – [in] source pitch in bytes

  • srcSlicePitch – [in] source slice pitch in bytes. This is required for 3D region copies where the depth member of ze_copy_region_t is not 0, otherwise it’s ignored.

  • hSignalEvent – [in][optional] handle of the event to signal on completion

  • numWaitEvents – [in][optional] number of events to wait on before launching; must be 0 if nullptr == phWaitEvents

  • phWaitEvents – [in][optional][range(0, numWaitEvents)] handle of the events to wait on before launching

Returns

zeCommandListAppendMemoryCopyFromContext

ZE_APIEXPORT ze_result_t ZE_APICALL zeCommandListAppendMemoryCopyFromContext(ze_command_list_handle_t hCommandList, void *dstptr, ze_context_handle_t hContextSrc, const void *srcptr, size_t size, ze_event_handle_t hSignalEvent, uint32_t numWaitEvents, ze_event_handle_t *phWaitEvents)

Copies host, device, or shared memory from another context.

  • The current active and source context must be from the same driver.

  • The application must ensure the memory pointed to by dstptr and srcptr is accessible by the device on which the command list was created.

  • The implementation must not access the memory pointed to by dstptr and srcptr as they are free to be modified by either the Host or device up until execution.

  • The application must ensure the events are accessible by the device on which the command list was created.

  • The application must ensure the command list and events were created, and the memory was allocated, on the same context.

  • The application must not call this function from simultaneous threads with the same command list handle.

  • The implementation of this function should be lock-free.

Parameters

  • hCommandList – [in] handle of command list

  • dstptr – [in] pointer to destination memory to copy to

  • hContextSrc – [in] handle of source context object

  • srcptr – [in] pointer to source memory to copy from

  • size – [in] size in bytes to copy

  • hSignalEvent – [in][optional] handle of the event to signal on completion

  • numWaitEvents – [in][optional] number of events to wait on before launching; must be 0 if nullptr == phWaitEvents

  • phWaitEvents – [in][optional][range(0, numWaitEvents)] handle of the events to wait on before launching

Returns

zeCommandListAppendImageCopy

ZE_APIEXPORT ze_result_t ZE_APICALL zeCommandListAppendImageCopy(ze_command_list_handle_t hCommandList, ze_image_handle_t hDstImage, ze_image_handle_t hSrcImage, ze_event_handle_t hSignalEvent, uint32_t numWaitEvents, ze_event_handle_t *phWaitEvents)

Copies an image.

  • The application must ensure the image and events are accessible by the device on which the command list was created.

  • The application must ensure the image format descriptors for both source and destination images are the same.

  • The application must ensure the command list, images and events were created on the same context.

  • The application must not call this function from simultaneous threads with the same command list handle.

  • The implementation of this function should be lock-free.

Remark

Analogues

  • clEnqueueCopyImage

Parameters

  • hCommandList – [in] handle of command list

  • hDstImage – [in] handle of destination image to copy to

  • hSrcImage – [in] handle of source image to copy from

  • hSignalEvent – [in][optional] handle of the event to signal on completion

  • numWaitEvents – [in][optional] number of events to wait on before launching; must be 0 if nullptr == phWaitEvents

  • phWaitEvents – [in][optional][range(0, numWaitEvents)] handle of the events to wait on before launching

Returns

zeCommandListAppendImageCopyRegion

ZE_APIEXPORT ze_result_t ZE_APICALL zeCommandListAppendImageCopyRegion(ze_command_list_handle_t hCommandList, ze_image_handle_t hDstImage, ze_image_handle_t hSrcImage, const ze_image_region_t *pDstRegion, const ze_image_region_t *pSrcRegion, ze_event_handle_t hSignalEvent, uint32_t numWaitEvents, ze_event_handle_t *phWaitEvents)

Copies a region of an image to another image.

  • The application must ensure the image and events are accessible by the device on which the command list was created.

  • The region width and height for both src and dst must be same. The origins can be different.

  • The src and dst regions cannot be overlapping.

  • The application must ensure the image format descriptors for both source and destination images are the same.

  • The application must ensure the command list, images and events were created, and the memory was allocated, on the same context.

  • The application must not call this function from simultaneous threads with the same command list handle.

  • The implementation of this function should be lock-free.

Parameters

  • hCommandList – [in] handle of command list

  • hDstImage – [in] handle of destination image to copy to

  • hSrcImage – [in] handle of source image to copy from

  • pDstRegion – [in][optional] destination region descriptor

  • pSrcRegion – [in][optional] source region descriptor

  • hSignalEvent – [in][optional] handle of the event to signal on completion

  • numWaitEvents – [in][optional] number of events to wait on before launching; must be 0 if nullptr == phWaitEvents

  • phWaitEvents – [in][optional][range(0, numWaitEvents)] handle of the events to wait on before launching

Returns

zeCommandListAppendImageCopyToMemory

ZE_APIEXPORT ze_result_t ZE_APICALL zeCommandListAppendImageCopyToMemory(ze_command_list_handle_t hCommandList, void *dstptr, ze_image_handle_t hSrcImage, const ze_image_region_t *pSrcRegion, ze_event_handle_t hSignalEvent, uint32_t numWaitEvents, ze_event_handle_t *phWaitEvents)

Copies from an image to device or shared memory.

  • The application must ensure the memory pointed to by dstptr is accessible by the device on which the command list was created.

  • The implementation must not access the memory pointed to by dstptr as it is free to be modified by either the Host or device up until execution.

  • The application must ensure the image and events are accessible by the device on which the command list was created.

  • The application must ensure the image format descriptor for the source image is a single-planar format.

  • The application must ensure the command list, image and events were created, and the memory was allocated, on the same context.

  • The application must not call this function from simultaneous threads with the same command list handle.

  • The implementation of this function should be lock-free.

Remark

Analogues

  • clEnqueueReadImage

Parameters

  • hCommandList – [in] handle of command list

  • dstptr – [in] pointer to destination memory to copy to

  • hSrcImage – [in] handle of source image to copy from

  • pSrcRegion – [in][optional] source region descriptor

  • hSignalEvent – [in][optional] handle of the event to signal on completion

  • numWaitEvents – [in][optional] number of events to wait on before launching; must be 0 if nullptr == phWaitEvents

  • phWaitEvents – [in][optional][range(0, numWaitEvents)] handle of the events to wait on before launching

Returns

zeCommandListAppendImageCopyFromMemory

ZE_APIEXPORT ze_result_t ZE_APICALL zeCommandListAppendImageCopyFromMemory(ze_command_list_handle_t hCommandList, ze_image_handle_t hDstImage, const void *srcptr, const ze_image_region_t *pDstRegion, ze_event_handle_t hSignalEvent, uint32_t numWaitEvents, ze_event_handle_t *phWaitEvents)

Copies to an image from device or shared memory.

  • The application must ensure the memory pointed to by srcptr is accessible by the device on which the command list was created.

  • The implementation must not access the memory pointed to by srcptr as it is free to be modified by either the Host or device up until execution.

  • The application must ensure the image and events are accessible by the device on which the command list was created.

  • The application must ensure the image format descriptor for the destination image is a single-planar format.

  • The application must ensure the command list, image and events were created, and the memory was allocated, on the same context.

  • The application must not call this function from simultaneous threads with the same command list handle.

  • The implementation of this function should be lock-free.

Remark

Analogues

  • clEnqueueWriteImage

Parameters

  • hCommandList – [in] handle of command list

  • hDstImage – [in] handle of destination image to copy to

  • srcptr – [in] pointer to source memory to copy from

  • pDstRegion – [in][optional] destination region descriptor

  • hSignalEvent – [in][optional] handle of the event to signal on completion

  • numWaitEvents – [in][optional] number of events to wait on before launching; must be 0 if nullptr == phWaitEvents

  • phWaitEvents – [in][optional][range(0, numWaitEvents)] handle of the events to wait on before launching

Returns

zeCommandListAppendMemoryPrefetch

ZE_APIEXPORT ze_result_t ZE_APICALL zeCommandListAppendMemoryPrefetch(ze_command_list_handle_t hCommandList, const void *ptr, size_t size)

Asynchronously prefetches shared memory to the device associated with the specified command list.

  • This is a hint to improve performance only and is not required for correctness.

  • Only prefetching to the device associated with the specified command list is supported. Prefetching to the host or to a peer device is not supported.

  • Prefetching may not be supported for all allocation types for all devices. If memory prefetching is not supported for the specified memory range the prefetch hint may be ignored.

  • Prefetching may only be supported at a device-specific granularity, such as at a page boundary. In this case, the memory range may be expanded such that the start and end of the range satisfy granularity requirements.

  • The application must ensure the memory pointed to by ptr is accessible by the device on which the command list was created.

  • The application must ensure the command list was created, and the memory was allocated, on the same context.

  • The application must not call this function from simultaneous threads with the same command list handle.

  • The implementation of this function should be lock-free.

Remark

Analogues

  • clEnqueueSVMMigrateMem

Parameters

  • hCommandList – [in] handle of command list

  • ptr – [in] pointer to start of the memory range to prefetch

  • size – [in] size in bytes of the memory range to prefetch

Returns

zeCommandListAppendMemAdvise

ZE_APIEXPORT ze_result_t ZE_APICALL zeCommandListAppendMemAdvise(ze_command_list_handle_t hCommandList, ze_device_handle_t hDevice, const void *ptr, size_t size, ze_memory_advice_t advice)

Provides advice about the use of a shared memory range.

  • Memory advice is a performance hint only and is not required for functional correctness.

  • Memory advice can be used to override driver heuristics to explicitly control shared memory behavior.

  • Not all memory advice hints may be supported for all allocation types for all devices. If a memory advice hint is not supported by the device it will be ignored.

  • Memory advice may only be supported at a device-specific granularity, such as at a page boundary. In this case, the memory range may be expanded such that the start and end of the range satisfy granularity requirements.

  • The application must ensure the memory pointed to by ptr is accessible by the device on which the command list was created.

  • The application must ensure the command list was created, and memory was allocated, on the same context.

  • The application must not call this function from simultaneous threads with the same command list handle, and the memory was allocated.

  • The implementation of this function should be lock-free.

Parameters

  • hCommandList – [in] handle of command list

  • hDevice – [in] device associated with the memory advice

  • ptr – [in] Pointer to the start of the memory range

  • size – [in] Size in bytes of the memory range

  • advice – [in] Memory advice for the memory range

Returns

Copy Enums

ze_memory_advice_t

enum ze_memory_advice_t

Supported memory advice hints.

Values:

enumerator ZE_MEMORY_ADVICE_SET_READ_MOSTLY

hint that memory will be read from frequently and written to rarely

enumerator ZE_MEMORY_ADVICE_CLEAR_READ_MOSTLY

removes the effect of ZE_MEMORY_ADVICE_SET_READ_MOSTLY

enumerator ZE_MEMORY_ADVICE_SET_PREFERRED_LOCATION

hint that the preferred memory location is the specified device

enumerator ZE_MEMORY_ADVICE_CLEAR_PREFERRED_LOCATION

removes the effect of ZE_MEMORY_ADVICE_SET_PREFERRED_LOCATION

enumerator ZE_MEMORY_ADVICE_SET_NON_ATOMIC_MOSTLY

hints that memory will mostly be accessed non-atomically

enumerator ZE_MEMORY_ADVICE_CLEAR_NON_ATOMIC_MOSTLY

removes the effect of ZE_MEMORY_ADVICE_SET_NON_ATOMIC_MOSTLY

enumerator ZE_MEMORY_ADVICE_BIAS_CACHED

hints that memory should be cached

enumerator ZE_MEMORY_ADVICE_BIAS_UNCACHED

hints that memory should be not be cached

enumerator ZE_MEMORY_ADVICE_SET_SYSTEM_MEMORY_PREFERRED_LOCATION

hint that the preferred memory location is host memory

enumerator ZE_MEMORY_ADVICE_CLEAR_SYSTEM_MEMORY_PREFERRED_LOCATION

removes the effect of ZE_MEMORY_ADVICE_SET_SYSTEM_MEMORY_PREFERRED_LOCATION

enumerator ZE_MEMORY_ADVICE_FORCE_UINT32

Copy Structures

ze_copy_region_t

struct ze_copy_region_t

Copy region descriptor.

Public Members

uint32_t originX

[in] The origin x offset for region in bytes

uint32_t originY

[in] The origin y offset for region in rows

uint32_t originZ

[in] The origin z offset for region in slices

uint32_t width

[in] The region width relative to origin in bytes

uint32_t height

[in] The region height relative to origin in rows

uint32_t depth

[in] The region depth relative to origin in slices. Set this to 0 for 2D copy.

ze_image_region_t

struct ze_image_region_t

Region descriptor.

Public Members

uint32_t originX

[in] The origin x offset for region in pixels

uint32_t originY

[in] The origin y offset for region in pixels

uint32_t originZ

[in] The origin z offset for region in pixels

uint32_t width

[in] The region width relative to origin in pixels

uint32_t height

[in] The region height relative to origin in pixels

uint32_t depth

[in] The region depth relative to origin. For 1D or 2D images, set this to 1.

Event

Event Functions

zeEventPoolCreate

ZE_APIEXPORT ze_result_t ZE_APICALL zeEventPoolCreate(ze_context_handle_t hContext, const ze_event_pool_desc_t *desc, uint32_t numDevices, ze_device_handle_t *phDevices, ze_event_pool_handle_t *phEventPool)

Creates a pool of events on the context.

  • The application must only use events within the pool for the device(s), or their sub-devices, which were provided during creation.

  • The application may call this function from simultaneous threads.

  • The implementation of this function must be thread-safe.

Parameters

  • hContext – [in] handle of the context object

  • desc – [in] pointer to event pool descriptor

  • numDevices – [in][optional] number of device handles; must be 0 if nullptr == phDevices

  • phDevices – [in][optional][range(0, numDevices)] array of device handles which have visibility to the event pool. if nullptr, then event pool is visible to all devices supported by the driver instance.

  • phEventPool – [out] pointer handle of event pool object created

Returns

zeEventPoolDestroy

ZE_APIEXPORT ze_result_t ZE_APICALL zeEventPoolDestroy(ze_event_pool_handle_t hEventPool)

Deletes an event pool object.

  • The application must destroy all event handles created from the pool before destroying the pool itself.

  • The application must ensure the device is not currently referencing the any event within the pool before it is deleted.

  • The implementation of this function may immediately free all Host and Device allocations associated with this event pool.

  • The application must not call this function from simultaneous threads with the same event pool handle.

  • The implementation of this function must be thread-safe.

Parameters

hEventPool – [in][release] handle of event pool object to destroy

Returns

zeEventCreate

ZE_APIEXPORT ze_result_t ZE_APICALL zeEventCreate(ze_event_pool_handle_t hEventPool, const ze_event_desc_t *desc, ze_event_handle_t *phEvent)

Creates an event from the pool.

  • An event is used to communicate fine-grain host-to-device, device-to-host or device-to-device dependencies have completed.

  • The application must ensure the location in the pool is not being used by another event.

  • The application must not call this function from simultaneous threads with the same event pool handle.

  • The implementation of this function should be lock-free.

Remark

Analogues

  • clCreateUserEvent

  • vkCreateEvent

Parameters

  • hEventPool – [in] handle of the event pool

  • desc – [in] pointer to event descriptor

  • phEvent – [out] pointer to handle of event object created

Returns

zeEventDestroy

ZE_APIEXPORT ze_result_t ZE_APICALL zeEventDestroy(ze_event_handle_t hEvent)

Deletes an event object.

  • The application must ensure the device is not currently referencing the event before it is deleted.

  • The implementation of this function may immediately free all Host and Device allocations associated with this event.

  • The application must not call this function from simultaneous threads with the same event handle.

  • The implementation of this function should be lock-free.

Remark

Analogues

  • clReleaseEvent

  • vkDestroyEvent

Parameters

hEvent – [in][release] handle of event object to destroy

Returns

zeEventPoolGetIpcHandle

ZE_APIEXPORT ze_result_t ZE_APICALL zeEventPoolGetIpcHandle(ze_event_pool_handle_t hEventPool, ze_ipc_event_pool_handle_t *phIpc)

Gets an IPC event pool handle for the specified event handle that can be shared with another process.

  • Event pool must have been created with ZE_EVENT_POOL_FLAG_IPC.

  • The application may call this function from simultaneous threads.

Parameters

  • hEventPool – [in] handle of event pool object

  • phIpc – [out] Returned IPC event handle

Returns

zeEventPoolPutIpcHandle

ZE_APIEXPORT ze_result_t ZE_APICALL zeEventPoolPutIpcHandle(ze_context_handle_t hContext, ze_ipc_event_pool_handle_t hIpc)

Returns an IPC event pool handle to the driver.

  • This call must be used for IPC handles previously obtained with zeEventPoolGetIpcHandle.

  • Upon call, driver may release any underlying resources associated with the IPC handle. For instance, it may close the file descriptor contained in the IPC handle, if such type of handle is being used by the driver.

  • This call does not destroy the original event pool for which the IPC handle was created.

  • This function may not be called from simultaneous threads with the same IPC handle.

  • The implementation of this function should be lock-free.

Parameters

  • hContext – [in] handle of the context object associated with the IPC event pool handle

  • hIpc – [in] IPC event pool handle

Returns

zeEventPoolOpenIpcHandle

ZE_APIEXPORT ze_result_t ZE_APICALL zeEventPoolOpenIpcHandle(ze_context_handle_t hContext, ze_ipc_event_pool_handle_t hIpc, ze_event_pool_handle_t *phEventPool)

Opens an IPC event pool handle to retrieve an event pool handle from another process.

  • Multiple calls to this function with the same IPC handle will return unique event pool handles.

  • The event handle in this process should not be freed with zeEventPoolDestroy, but rather with zeEventPoolCloseIpcHandle.

  • If the original event pool has been created for a device containing a number of sub-devices, then the event pool returned by this call may be used on a device containing the same number of sub-devices, or on any of those sub-devices.

  • However, if the original event pool has been created for a sub-device, then the event pool returned by this call cannot be used on a device containing any number of sub-devices, and must be used only in a sub-device. This ensures functional correctness for any implementation or optimizations the underlying Level Zero driver may do on event pools and events.

  • The application may call this function from simultaneous threads.

Parameters

  • hContext – [in] handle of the context object to associate with the IPC event pool handle

  • hIpc – [in] IPC event pool handle

  • phEventPool – [out] pointer handle of event pool object created

Returns

zeEventPoolCloseIpcHandle

ZE_APIEXPORT ze_result_t ZE_APICALL zeEventPoolCloseIpcHandle(ze_event_pool_handle_t hEventPool)

Closes an IPC event handle in the current process.

  • Closes an IPC event handle by destroying events that were opened in this process using zeEventPoolOpenIpcHandle.

  • The application must not call this function from simultaneous threads with the same event pool handle.

Parameters

hEventPool – [in][release] handle of event pool object

Returns

zeCommandListAppendSignalEvent

ZE_APIEXPORT ze_result_t ZE_APICALL zeCommandListAppendSignalEvent(ze_command_list_handle_t hCommandList, ze_event_handle_t hEvent)

Appends a signal of the event from the device into a command list.

  • The application must ensure the events are accessible by the device on which the command list was created.

  • The duration of an event created from an event pool that was created using ZE_EVENT_POOL_FLAG_KERNEL_TIMESTAMP or ZE_EVENT_POOL_FLAG_KERNEL_MAPPED_TIMESTAMP flags is undefined. However, for consistency and orthogonality the event will report correctly as signaled when used by other event API functionality.

  • The application must ensure the command list and events were created on the same context.

  • The application must not call this function from simultaneous threads with the same command list handle.

  • The implementation of this function should be lock-free.

Remark

Analogues

  • clSetUserEventStatus

  • vkCmdSetEvent

Parameters

  • hCommandList – [in] handle of the command list

  • hEvent – [in] handle of the event

Returns

zeCommandListAppendWaitOnEvents

ZE_APIEXPORT ze_result_t ZE_APICALL zeCommandListAppendWaitOnEvents(ze_command_list_handle_t hCommandList, uint32_t numEvents, ze_event_handle_t *phEvents)

Appends wait on event(s) on the device into a command list.

  • The application must ensure the events are accessible by the device on which the command list was created.

  • The application must ensure the command list and events were created on the same context.

  • The application must not call this function from simultaneous threads with the same command list handle.

  • The implementation of this function should be lock-free.

Parameters

  • hCommandList – [in] handle of the command list

  • numEvents – [in] number of events to wait on before continuing

  • phEvents – [in][range(0, numEvents)] handles of the events to wait on before continuing

Returns

zeEventHostSignal

ZE_APIEXPORT ze_result_t ZE_APICALL zeEventHostSignal(ze_event_handle_t hEvent)

Signals a event from host.

  • The duration of an event created from an event pool that was created using ZE_EVENT_POOL_FLAG_KERNEL_TIMESTAMP or ZE_EVENT_POOL_FLAG_KERNEL_MAPPED_TIMESTAMP flags is undefined. However, for consistency and orthogonality the event will report correctly as signaled when used by other event API functionality.

  • The application may call this function from simultaneous threads.

  • The implementation of this function should be lock-free.

Remark

Analogues

  • clSetUserEventStatus

Parameters

hEvent – [in] handle of the event

Returns

zeEventHostSynchronize

ZE_APIEXPORT ze_result_t ZE_APICALL zeEventHostSynchronize(ze_event_handle_t hEvent, uint64_t timeout)

The current host thread waits on an event to be signaled.

  • The application may call this function from simultaneous threads.

  • The implementation of this function should be lock-free.

Remark

Analogues

  • clWaitForEvents

Parameters

  • hEvent – [in] handle of the event

  • timeout – [in] if non-zero, then indicates the maximum time (in nanoseconds) to yield before returning ZE_RESULT_SUCCESS or ZE_RESULT_NOT_READY; if zero, then operates exactly like zeEventQueryStatus; if UINT64_MAX, then function will not return until complete or device is lost. Due to external dependencies, timeout may be rounded to the closest value allowed by the accuracy of those dependencies.

Returns

zeEventQueryStatus

ZE_APIEXPORT ze_result_t ZE_APICALL zeEventQueryStatus(ze_event_handle_t hEvent)

Queries an event object’s status on the host.

  • The application may call this function from simultaneous threads.

  • The implementation of this function should be lock-free.

Remark

Analogues

  • clGetEventInfo

  • vkGetEventStatus

Parameters

hEvent – [in] handle of the event

Returns

zeCommandListAppendEventReset

ZE_APIEXPORT ze_result_t ZE_APICALL zeCommandListAppendEventReset(ze_command_list_handle_t hCommandList, ze_event_handle_t hEvent)

Appends a reset of an event back to not signaled state into a command list.

  • The application must ensure the events are accessible by the device on which the command list was created.

  • The application must ensure the command list and events were created on the same context.

  • The application must not call this function from simultaneous threads with the same command list handle.

  • The implementation of this function should be lock-free.

Remark

Analogues

  • vkResetEvent

Parameters

  • hCommandList – [in] handle of the command list

  • hEvent – [in] handle of the event

Returns

zeEventHostReset

ZE_APIEXPORT ze_result_t ZE_APICALL zeEventHostReset(ze_event_handle_t hEvent)

The current host thread resets an event back to not signaled state.

  • The application may call this function from simultaneous threads.

  • The implementation of this function should be lock-free.

Remark

Analogues

  • vkResetEvent

Parameters

hEvent – [in] handle of the event

Returns

zeEventQueryKernelTimestamp

ZE_APIEXPORT ze_result_t ZE_APICALL zeEventQueryKernelTimestamp(ze_event_handle_t hEvent, ze_kernel_timestamp_result_t *dstptr)

Queries an event’s timestamp value on the host.

Parameters

  • hEvent – [in] handle of the event

  • dstptr – [in,out] pointer to memory for where timestamp result will be written.

Returns

zeCommandListAppendQueryKernelTimestamps

ZE_APIEXPORT ze_result_t ZE_APICALL zeCommandListAppendQueryKernelTimestamps(ze_command_list_handle_t hCommandList, uint32_t numEvents, ze_event_handle_t *phEvents, void *dstptr, const size_t *pOffsets, ze_event_handle_t hSignalEvent, uint32_t numWaitEvents, ze_event_handle_t *phWaitEvents)

Appends a query of an events’ timestamp value(s) into a command list.

  • The application must ensure the events are accessible by the device on which the command list was created.

  • The application must ensure the events were created from an event pool that was created using ZE_EVENT_POOL_FLAG_KERNEL_TIMESTAMP flag.

  • The application must ensure the memory pointed to by both dstptr and pOffsets is accessible by the device on which the command list was created.

  • The value(s) written to the destination buffer are undefined if any timestamp event has not been signaled.

  • If pOffsets is nullptr, then multiple results will be appended sequentially into memory in the same order as phEvents.

  • The application must ensure the command list and events were created, and the memory was allocated, on the same context.

  • The application must not call this function from simultaneous threads with the same command list handle.

  • The implementation of this function should be lock-free.

Parameters

  • hCommandList – [in] handle of the command list

  • numEvents – [in] the number of timestamp events to query

  • phEvents – [in][range(0, numEvents)] handles of timestamp events to query

  • dstptr – [in,out] pointer to memory where ze_kernel_timestamp_result_t will be written; must be size-aligned.

  • pOffsets – [in][optional][range(0, numEvents)] offset, in bytes, to write results; address must be 4byte-aligned and offsets must be size-aligned.

  • hSignalEvent – [in][optional] handle of the event to signal on completion

  • numWaitEvents – [in][optional] number of events to wait on before executing query; must be 0 if nullptr == phWaitEvents

  • phWaitEvents – [in][optional][range(0, numWaitEvents)] handle of the events to wait on before executing query

Returns

Event Enums

ze_event_pool_flags_t

enum ze_event_pool_flag_t

Values:

enumerator ZE_EVENT_POOL_FLAG_HOST_VISIBLE

signals and waits are also visible to host

enumerator ZE_EVENT_POOL_FLAG_IPC

signals and waits may be shared across processes

enumerator ZE_EVENT_POOL_FLAG_KERNEL_TIMESTAMP

Indicates all events in pool will contain kernel timestamps.

enumerator ZE_EVENT_POOL_FLAG_KERNEL_MAPPED_TIMESTAMP

Indicates all events in pool will contain kernel timestamps synchronized to host time domain; cannot be combined with ZE_EVENT_POOL_FLAG_KERNEL_TIMESTAMP

enumerator ZE_EVENT_POOL_FLAG_FORCE_UINT32

ze_event_scope_flags_t

enum ze_event_scope_flag_t

Values:

enumerator ZE_EVENT_SCOPE_FLAG_SUBDEVICE

cache hierarchies are flushed or invalidated sufficient for local sub-device access

enumerator ZE_EVENT_SCOPE_FLAG_DEVICE

cache hierarchies are flushed or invalidated sufficient for global device access and peer device access

enumerator ZE_EVENT_SCOPE_FLAG_HOST

cache hierarchies are flushed or invalidated sufficient for device and host access

enumerator ZE_EVENT_SCOPE_FLAG_FORCE_UINT32

Event Structures

ze_event_pool_desc_t

struct ze_event_pool_desc_t

Event pool descriptor.

Public Members

ze_structure_type_t stype

[in] type of this structure

const void *pNext

[in][optional] must be null or a pointer to an extension-specific structure (i.e. contains stype and pNext).

ze_event_pool_flags_t flags

[in] creation flags. must be 0 (default) or a valid combination of ze_event_pool_flag_t; default behavior is signals and waits are visible to the entire device and peer devices.

uint32_t count

[in] number of events within the pool; must be greater than 0

ze_event_desc_t

struct ze_event_desc_t

Event descriptor.

Public Members

ze_structure_type_t stype

[in] type of this structure

const void *pNext

[in][optional] must be null or a pointer to an extension-specific structure (i.e. contains stype and pNext).

uint32_t index

[in] index of the event within the pool; must be less than the count specified during pool creation

ze_event_scope_flags_t signal

[in] defines the scope of relevant cache hierarchies to flush on a signal action before the event is triggered. must be 0 (default) or a valid combination of ze_event_scope_flag_t; default behavior is synchronization within the command list only, no additional cache hierarchies are flushed.

ze_event_scope_flags_t wait

[in] defines the scope of relevant cache hierarchies to invalidate on a wait action after the event is complete. must be 0 (default) or a valid combination of ze_event_scope_flag_t; default behavior is synchronization within the command list only, no additional cache hierarchies are invalidated.

ze_kernel_timestamp_data_t

struct ze_kernel_timestamp_data_t

Kernel timestamp clock data.

  • The timestamp frequency can be queried from the timerResolution member of ze_device_properties_t.

  • The number of valid bits in the timestamp value can be queried from the kernelTimestampValidBits member of ze_device_properties_t.

Public Members

uint64_t kernelStart

[out] device clock at start of kernel execution

uint64_t kernelEnd

[out] device clock at end of kernel execution

ze_kernel_timestamp_result_t

struct ze_kernel_timestamp_result_t

Kernel timestamp result.

Public Members

ze_kernel_timestamp_data_t global

[out] wall-clock data

ze_kernel_timestamp_data_t context

[out] context-active data; only includes clocks while device context was actively executing.

Fence

Fence Functions

zeFenceCreate

ZE_APIEXPORT ze_result_t ZE_APICALL zeFenceCreate(ze_command_queue_handle_t hCommandQueue, const ze_fence_desc_t *desc, ze_fence_handle_t *phFence)

Creates a fence for the command queue.

  • A fence is a heavyweight synchronization primitive used to communicate to the host that command list execution has completed.

  • The application must only use the fence for the command queue which was provided during creation.

  • The application may call this function from simultaneous threads.

  • The implementation of this function must be thread-safe.

Remark

Analogues

  • vkCreateFence

Parameters

  • hCommandQueue – [in] handle of command queue

  • desc – [in] pointer to fence descriptor

  • phFence – [out] pointer to handle of fence object created

Returns

zeFenceDestroy

ZE_APIEXPORT ze_result_t ZE_APICALL zeFenceDestroy(ze_fence_handle_t hFence)

Deletes a fence object.

  • The application must ensure the device is not currently referencing the fence before it is deleted.

  • The implementation of this function may immediately free all Host and Device allocations associated with this fence.

  • The application must not call this function from simultaneous threads with the same fence handle.

  • The implementation of this function must be thread-safe.

Remark

Analogues

  • vkDestroyFence

Parameters

hFence – [in][release] handle of fence object to destroy

Returns

zeFenceHostSynchronize

ZE_APIEXPORT ze_result_t ZE_APICALL zeFenceHostSynchronize(ze_fence_handle_t hFence, uint64_t timeout)

The current host thread waits on a fence to be signaled.

  • The application may call this function from simultaneous threads.

  • The implementation of this function should be lock-free.

Remark

Analogues

  • vkWaitForFences

Parameters

  • hFence – [in] handle of the fence

  • timeout – [in] if non-zero, then indicates the maximum time (in nanoseconds) to yield before returning ZE_RESULT_SUCCESS or ZE_RESULT_NOT_READY; if zero, then operates exactly like zeFenceQueryStatus; if UINT64_MAX, then function will not return until complete or device is lost. Due to external dependencies, timeout may be rounded to the closest value allowed by the accuracy of those dependencies.

Returns

zeFenceQueryStatus

ZE_APIEXPORT ze_result_t ZE_APICALL zeFenceQueryStatus(ze_fence_handle_t hFence)

Queries a fence object’s status.

  • The application may call this function from simultaneous threads.

  • The implementation of this function should be lock-free.

Remark

Analogues

  • vkGetFenceStatus

Parameters

hFence – [in] handle of the fence

Returns

zeFenceReset

ZE_APIEXPORT ze_result_t ZE_APICALL zeFenceReset(ze_fence_handle_t hFence)

Reset a fence back to the not signaled state.

  • The application may call this function from simultaneous threads.

  • The implementation of this function should be lock-free.

Remark

Analogues

  • vkResetFences

Parameters

hFence – [in] handle of the fence

Returns

Fence Enums

ze_fence_flags_t

enum ze_fence_flag_t

Values:

enumerator ZE_FENCE_FLAG_SIGNALED

fence is created in the signaled state, otherwise not signaled.

enumerator ZE_FENCE_FLAG_FORCE_UINT32

Fence Structures

ze_fence_desc_t

struct ze_fence_desc_t

Fence descriptor.

Public Members

ze_structure_type_t stype

[in] type of this structure

const void *pNext

[in][optional] must be null or a pointer to an extension-specific structure (i.e. contains stype and pNext).

ze_fence_flags_t flags

[in] creation flags. must be 0 (default) or a valid combination of ze_fence_flag_t.