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

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ID 683398
Date 5/04/2018
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Document Table of Contents
Document Table of Contents x
1. Intel® FPGA SDK for OpenCL™ Standard Edition Custom Platform Toolkit User Guide 2. Intel® FPGA SDK for OpenCL™ Standard Edition Custom Platform Toolkit Reference Material
1. Intel® FPGA SDK for OpenCL™ Standard Edition Custom Platform Toolkit User Guide x
1.1. Prerequisites for the Intel® FPGA SDK for OpenCL™ Standard Edition Custom Platform Toolkit 1.2. Overview of the Intel® FPGA SDK for OpenCL™ Standard Edition Custom Platform 1.3. Custom Platform Automigration for Forward Compatibility 1.4. Creating an Intel® FPGA SDK for OpenCL™ Standard Edition Custom Platform 1.5. Applying for the Intel® FPGA SDK for OpenCL™ Standard Edition Preferred Board Status 1.6. Shipping Recommendations 1.7. Intel® FPGA SDK for OpenCL™ Standard Edition Custom Platform Design Revision History
1.2. Overview of the Intel® FPGA SDK for OpenCL™ Standard Edition Custom Platform x
1.2.1. Directories and Files in an Intel® FPGA SDK for OpenCL™ Standard 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™ Standard Edition 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™ Standard Edition 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 (Standard) System 1.4.1.2. Establishing Guaranteed Timing Flow
1.4.1.1. Creating the Board Platform Designer (Standard) 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™ Standard Edition Custom Platform Toolkit Reference Material x
2.1. The Board Platform Designer (Standard) Subsystem 2.2. XML Elements, Attributes, and Parameters in the board_spec.xml File 2.3. MMD API Descriptions 2.4. Intel® FPGA SDK for OpenCL™ Standard Edition Custom Platform Toolkit Reference Manual Revision History
2.1. The Board Platform Designer (Standard) Subsystem x
2.1.1. Intel® FPGA SDK for OpenCL™ Standard Edition-Specific Platform Designer (Standard) System Components
2.1.1. Intel® FPGA SDK for OpenCL™ Standard Edition-Specific Platform Designer (Standard) 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_status_handler 2.3.10. aocl_mmd_yield 2.3.11. aocl_mmd_shared_mem_alloc 2.3.12. aocl_mmd_shared_mem_free 2.3.13. aocl_mmd_reprogram 2.3.14. aocl_mmd_hostchannel_create 2.3.15. aocl_mmd_hostchannel_destroy 2.3.16. aocl_mmd_hostchannel_get_buffer Syntax Function Arguments Return Value 2.3.17. aocl_mmd_hostchannel_ack_buffer
2.3.13. aocl_mmd_reprogram x
2.3.13.1. Reprogram Support
1. Intel® FPGA SDK for OpenCL™ Standard Edition Custom Platform Toolkit User Guide
2. Intel® FPGA SDK for OpenCL™ Standard Edition Custom Platform Toolkit Reference Material

2.3.16. aocl_mmd_hostchannel_get_buffer

The aocl_mmd_hostchannel_get_buffer function provides a host with a pointer to the buffer they can access to write or read from the channel interface, along with the space or data available in the buffer, in bytes.

Syntax

void *aocl_mmd_hostchannel_get_buffer( int handle,
                                       int channel,
                                       size_t *buffer_size,
                                       int *status );

Function Arguments

  1. handle—A positive int value representing the handle to the board obtained from the aocl_mmd_open() call.
  2. channel—A positive int value representing handle to the channel to close obtained from the aocl_mmd_hostchannel_create() call.
  3. buffer_size—A pointer to size_t that the function will write available buffer space or size to.
  4. status—A pointer to int that the function will write result of the call to.

Return Value

If the function executes successfully, int pointed to by the status pointer will be 0. Returned void* may still be NULL, in which case size_t pointed by the buffer_size will be 0.

If the function fails to execute, int pointed by the status pointer will be a negative value.

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