MdeModulePkg/Bus/Pci/EhciPei/EhciSched.h

/** @file
Private Header file for Usb Host Controller PEIM

Copyright (c) 2010 - 2018, Intel Corporation. All rights reserved.<BR>

SPDX-License-Identifier: BSD-2-Clause-Patent

**/

#pragma once

/**
  Initialize the schedule data structure such as frame list.

  @param  Ehc   The EHCI device to init schedule data for.

  @retval EFI_OUT_OF_RESOURCES  Failed to allocate resource to init schedule data.
  @retval EFI_SUCCESS           The schedule data is initialized.

**/
EFI_STATUS
EhcInitSched (
  IN PEI_USB2_HC_DEV  *Ehc
  )
;

/**
  Free the schedule data. It may be partially initialized.

  @param  Ehc   The EHCI device.

**/
VOID
EhcFreeSched (
  IN PEI_USB2_HC_DEV  *Ehc
  )
;

/**
  Link the queue head to the asynchronous schedule list.
  UEFI only supports one CTRL/BULK transfer at a time
  due to its interfaces. This simplifies the AsynList
  management: A reclamation header is always linked to
  the AsyncListAddr, the only active QH is appended to it.

  @param  Ehc   The EHCI device.
  @param  Qh    The queue head to link.

**/
VOID
EhcLinkQhToAsync (
  IN PEI_USB2_HC_DEV  *Ehc,
  IN PEI_EHC_QH       *Qh
  )
;

/**
  Unlink a queue head from the asynchronous schedule list.
  Need to synchronize with hardware.

  @param  Ehc   The EHCI device.
  @param  Qh    The queue head to unlink.

**/
VOID
EhcUnlinkQhFromAsync (
  IN PEI_USB2_HC_DEV  *Ehc,
  IN PEI_EHC_QH       *Qh
  )
;

/**
  Execute the transfer by polling the URB. This is a synchronous operation.

  @param  Ehc               The EHCI device.
  @param  Urb               The URB to execute.
  @param  TimeOut           The time to wait before abort, in millisecond.

  @retval EFI_DEVICE_ERROR  The transfer failed due to transfer error.
  @retval EFI_TIMEOUT       The transfer failed due to time out.
  @retval EFI_SUCCESS       The transfer finished OK.

**/
EFI_STATUS
EhcExecTransfer (
  IN  PEI_USB2_HC_DEV  *Ehc,
  IN  PEI_URB          *Urb,
  IN  UINTN            TimeOut
  )
;