USB Shared Chunks

The USB client Logical Device Driver (LDD) API has been extended to share chunks between the kernel side USB LDD and the user side USB applications such as Mass Storage.

Shared chunks improve performance by eliminating the need to copy data between different processes. USB client application efficiency will be improved by sharing chunks from the kernel side drivers to the application.

• Writing a Class Driver Tutorial
  This document set provides step-by-step instructions that will enable a user to use the USB LDD interface to create a simple class driver.
• Load and Open a USB Channel
  Before configuration the Logical Device Driver (LDD) must be loaded and opened.
• Set the Configuration Descriptors
  A short document that describes how to set the configuration descriptors.
• Set the Interface Descriptors
  A short document that describes how to set the interface descriptors.
• Allocate Resources for Endpoints
  This tutorial shows how to set up the required endpoint resources.
• Re-Enumerate
  A short description of how to perform a Re-Enumeration.
• Using the BIL Interface
  This tutorial describes how to use the Buffer Interface Layer (BIL) to read and write shared chunks form the client driver.
• Read Data from USB using Shared Chunks
  
• Write Data to USB using Shared Chunks
  This tutorial describes how to write shared chunk data to a USB connection.
• Close and Unload the Driver
  A short tutorial describing how to close and unload the shared chunk, close the USB channel and unload the USB Logical Device Driver (LDD).