Intel® FPGA SDK for OpenCL™ Pro Edition: Custom Platform Toolkit User Guide

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ID 683085
Date 3/28/2022
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Document Table of Contents
Document Table of Contents x
1. Intel® FPGA SDK for OpenCL™ Pro Edition Custom Platform Toolkit User Guide 2. Intel® FPGA SDK for OpenCL™ Pro Edition Custom Platform Toolkit Reference Material 3. Intel FPGA SDK for OpenCL Pro Edition Custom Platform Toolkit Archives 4. Document Revision History for Intel® FPGA SDK for OpenCL™ Pro Edition Custom Platform Toolkit User Guide
1. Intel® FPGA SDK for OpenCL™ Pro Edition Custom Platform Toolkit User Guide x
1.1. Prerequisites for the Intel® FPGA SDK for OpenCL™ Pro Edition Custom Platform Toolkit 1.2. Overview of the Intel® FPGA SDK for OpenCL™ Pro Edition Custom Platform 1.3. Custom Platform Automigration for Forward Compatibility 1.4. Creating an Intel® FPGA SDK for OpenCL™ Custom Platform 1.5. Applying for the Intel® FPGA SDK for OpenCL™ Pro Edition Preferred Board Status 1.6. Shipping Recommendations
1.2. Overview of the Intel® FPGA SDK for OpenCL™ Pro Edition Custom Platform x
1.2.1. Directories and Files in an Intel® FPGA SDK for OpenCL™ Pro Edition Custom Platform 1.2.2. Recommendations for Structuring the Custom Platform Directory
1.3. Custom Platform Automigration for Forward Compatibility x
1.3.1. Customizing Automigration
1.4. Creating an Intel® FPGA SDK for OpenCL™ Custom Platform x
1.4.1. Designing the Board Hardware 1.4.2. Creating the Board XML Files 1.4.3. Creating the MMD Library 1.4.4. Setting Up the FPGA Client Driver 1.4.5. Providing Intel® FPGA SDK for OpenCL™ Utilities Support 1.4.6. Testing the Hardware Design
1.4.1. Designing the Board Hardware x
1.4.1.1. Creating the Board Platform Designer System 1.4.1.2. Establishing Guaranteed Timing Flow
1.4.1.1. Creating the Board Platform Designer System x
1.4.1.1.1. General Quality of Results Considerations for the Exported Board Partition
1.4.2. Creating the Board XML Files x
1.4.2.1. Creating the board_env.xml File 1.4.2.2. Creating the board_spec.xml File
1.4.2.1. Creating the board_env.xml File x
1.4.2.1.1. Testing the board_env.xml File
1.4.3. Creating the MMD Library x
1.4.3.1. Kernel Power-up State
2. Intel® FPGA SDK for OpenCL™ Pro Edition Custom Platform Toolkit Reference Material x
2.1. The Board Platform Designer Subsystem 2.2. XML Elements, Attributes, and Parameters in the board_spec.xml File 2.3. MMD API Descriptions
2.1. The Board Platform Designer Subsystem x
2.1.1. Intel® FPGA SDK for OpenCL™ Pro Edition-Specific Platform Designer System Components
2.1.1. Intel® FPGA SDK for OpenCL™ Pro Edition-Specific Platform Designer System Components x
2.1.1.1. OpenCL Kernel Clock Generator 2.1.1.2. OpenCL Kernel Interface 2.1.1.3. OpenCL Memory Bank Divider
2.2. XML Elements, Attributes, and Parameters in the board_spec.xml File x
2.2.1. board 2.2.2. device 2.2.3. global_mem 2.2.4. host 2.2.5. channels 2.2.6. interfaces 2.2.7. interface 2.2.8. compile
2.3. MMD API Descriptions x
2.3.1. aocl_mmd_get_offline_info 2.3.2. aocl_mmd_get_info 2.3.3. aocl_mmd_open 2.3.4. aocl_mmd_close 2.3.5. aocl_mmd_read 2.3.6. aocl_mmd_write 2.3.7. aocl_mmd_copy 2.3.8. aocl_mmd_set_interrupt_handler 2.3.9. aocl_mmd_set_device_interrupt_handler 2.3.10. aocl_mmd_set_status_handler 2.3.11. aocl_mmd_yield 2.3.12. aocl_mmd_shared_mem_alloc 2.3.13. aocl_mmd_shared_mem_free 2.3.14. aocl_mmd_program 2.3.15. aocl_mmd_reprogram 2.3.16. aocl_mmd_hostchannel_create 2.3.17. aocl_mmd_hostchannel_destroy 2.3.18. aocl_mmd_hostchannel_get_buffer 2.3.19. aocl_mmd_hostchannel_ack_buffer 2.3.20. aocl_mmd_host_alloc Syntax Function Arguments Return Value 2.3.21. aocl_mmd_free 2.3.22. aocl_mmd_device_alloc 2.3.23. aocl_mmd_shared_alloc 2.3.24. aocl_mmd_shared_migrate
2.3.14. aocl_mmd_program x
2.3.14.1. Program Support
1. Intel® FPGA SDK for OpenCL™ Pro Edition Custom Platform Toolkit User Guide
2. Intel® FPGA SDK for OpenCL™ Pro Edition Custom Platform Toolkit Reference Material
3. Intel FPGA SDK for OpenCL Pro Edition Custom Platform Toolkit Archives
4. Document Revision History for Intel® FPGA SDK for OpenCL™ Pro Edition Custom Platform Toolkit User Guide

2.3.20. aocl_mmd_host_alloc

Host allocations provide memory that is allocated on the host. This memory must be deallocated with the aocl_mmd_free function. Host allocations are accessible by the host and one or more devices. The same pointer to a host allocation may be used on the host and all supported devices. They have address equivalence.

Syntax

Once the device has signaled completion through the aocl_mmd_interrupt_handler_fn function, the host can assume it has access to the latest contents of the memory, allocated by the aocl_mmd_host_alloc function call. 

void* aocl_mmd_host_alloc (int* handles, 
                           size_t num_devices,
                           size_t size,
                           size_t alignment,
                           aocl_mmd_mem_properties_t *properties,
                           int* error);

Function Arguments

  • handles—Handles for devices that needs access to this memory.
  • num_devices—Number of devices in the handles.
  • size—The size of the memory region.
  • alignment—The alignment (in bytes) of the allocation.
  • properties—Specifies additional information about the allocated memory, described by a property type name and its corresponding value. Each property type name is immediately followed by the corresponding desired value. The list is terminated with a zero. Supported values are described above. For example, [<property1>, <value1>, <property2>, <value2>, 0]
  • error—The error code defined by AOCL_MMD_ERROR*:
    • AOCL_MMD_ERROR_SUCCESS—No error occurred.
    • AOCL_MMD_ERROR_INVALID_HANDLE—The device handle provided is invalid.
    • AOCL_MMD_ERROR_OUT_OF_MEMORY—Ran out of memory.
    • AOCL_MMD_ERROR_UNSUPPORTED_ALIGNMENT—The device does not support the provided alignment.
    • AOCL_MMD_ERROR_UNSUPPORTED_PROPERTY—The device does not support the provided property.

Return Value

If the aocl_mmd_host_alloc function executes successfully, the return value is a valid pointer value. Otherwise, the return value is NULL.

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