/** @file

  Provides some data structure definitions used by the XHCI host controller driver.

(C) Copyright 2023 Hewlett Packard Enterprise Development LP<BR>
Copyright (c) 2011 - 2017, Intel Corporation. All rights reserved.<BR>
Copyright (c) Microsoft Corporation.<BR>
SPDX-License-Identifier: BSD-2-Clause-Patent

**/

#pragma once

#include <Uefi.h>

#include <Protocol/Usb2HostController.h>
#include <Protocol/PciIo.h>

#include <Guid/EventGroup.h>

#include <Library/BaseLib.h>
#include <Library/BaseMemoryLib.h>
#include <Library/UefiDriverEntryPoint.h>
#include <Library/UefiBootServicesTableLib.h>
#include <Library/MemoryAllocationLib.h>
#include <Library/UefiLib.h>
#include <Library/DebugLib.h>
#include <Library/ReportStatusCodeLib.h>
#include <Library/TimerLib.h>
#include <Library/PcdLib.h>

#include <IndustryStandard/Pci.h>

typedef struct _USB_XHCI_INSTANCE  USB_XHCI_INSTANCE;
typedef struct _USB_DEV_CONTEXT    USB_DEV_CONTEXT;

#include "XhciReg.h"
#include "XhciSched.h"
#include "ComponentName.h"
#include "UsbHcMem.h"

//
// Converts a count from microseconds to nanoseconds
//
#define XHC_MICROSECOND_TO_NANOSECOND(Time)  (MultU64x32((Time), 1000))

//
// The unit is microsecond, setting it as 1us.
//
#define XHC_1_MICROSECOND  (1)
//
// The unit is microsecond, setting it as 1ms.
//
#define XHC_1_MILLISECOND  (1000)
//
// XHC generic timeout experience values.
// The unit is millisecond, setting it as 10s.
//
#define XHC_GENERIC_TIMEOUT  (10 * 1000)
//
// XHC reset timeout experience values.
// The unit is millisecond, setting it as 1s.
//
#define XHC_RESET_TIMEOUT  (1000)
//
// TRSTRCY delay requirement in usb 2.0 spec chapter 7.1.7.5.
// The unit is microsecond, setting it as 10ms.
//
#define XHC_RESET_RECOVERY_DELAY  (10 * 1000)
//
// XHC async transfer timer interval, set by experience.
// The unit is 100us, takes 1ms as interval.
//
#define XHC_ASYNC_TIMER_INTERVAL  EFI_TIMER_PERIOD_MILLISECONDS(1)

//
// XHC raises TPL to TPL_NOTIFY to serialize all its operations
// to protect shared data structures.
//
#define XHC_TPL  TPL_NOTIFY

#define CMD_RING_TRB_NUMBER    0x100
#define TR_RING_TRB_NUMBER     0x100
#define ERST_NUMBER            0x01
#define EVENT_RING_TRB_NUMBER  0x200

#define CMD_INTER        0
#define CTRL_INTER       1
#define BULK_INTER       2
#define INT_INTER        3
#define INT_INTER_ASYNC  4

#define EFI_LIST_CONTAINER(Entry, Type, Field)  BASE_CR(Entry, Type, Field)

#define XHC_LOW_32BIT(Addr64)      ((UINT32)(((UINTN)(Addr64)) & 0xFFFFFFFF))
#define XHC_HIGH_32BIT(Addr64)     ((UINT32)(RShiftU64((UINT64)(UINTN)(Addr64), 32) & 0xFFFFFFFF))
#define XHC_BIT_IS_SET(Data, Bit)  ((BOOLEAN)(((Data) & (Bit)) == (Bit)))

#define XHC_REG_BIT_IS_SET(Xhc, Offset, Bit) \
          (XHC_BIT_IS_SET(XhcReadOpReg ((Xhc), (Offset)), (Bit)))

#define XHCI_IS_DATAIN(EndpointAddr)  XHC_BIT_IS_SET((EndpointAddr), 0x80)

#define XHCI_INSTANCE_SIG  SIGNATURE_32 ('x', 'h', 'c', 'i')
#define XHC_FROM_THIS(a)  CR(a, USB_XHCI_INSTANCE, Usb2Hc, XHCI_INSTANCE_SIG)

#define USB_DESC_TYPE_HUB              0x29
#define USB_DESC_TYPE_HUB_SUPER_SPEED  0x2a

//
// The RequestType in EFI_USB_DEVICE_REQUEST is composed of
// three fields: One bit direction, 2 bit type, and 5 bit
// target.
//
#define USB_REQUEST_TYPE(Dir, Type, Target) \
          ((UINT8)((((Dir) == EfiUsbDataIn ? 0x01 : 0) << 7) | (Type) | (Target)))

//
// Xhci Data and Ctrl Structures
//
#pragma pack(1)
typedef struct {
  UINT8    ProgInterface;
  UINT8    SubClassCode;
  UINT8    BaseCode;
} USB_CLASSC;

typedef struct {
  UINT8     Length;
  UINT8     DescType;
  UINT8     NumPorts;
  UINT16    HubCharacter;
  UINT8     PwrOn2PwrGood;
  UINT8     HubContrCurrent;
  UINT8     Filler[16];
} EFI_USB_HUB_DESCRIPTOR;
#pragma pack()

struct _USB_DEV_CONTEXT {
  //
  // Whether this entry in UsbDevContext array is used or not.
  //
  BOOLEAN          Enabled;
  //
  // The slot id assigned to the new device through XHCI's Enable_Slot cmd.
  //
  UINT8            SlotId;
  //
  // The route string presented an attached usb device.
  //
  USB_DEV_ROUTE    RouteString;
  //
  // The route string of parent device if it exists. Otherwise it's zero.
  //
  USB_DEV_ROUTE    ParentRouteString;
  //
  // The actual device address assigned by XHCI through Address_Device command.
  //
  UINT8            XhciDevAddr;
  //
  // The requested device address from UsbBus driver through Set_Address standard usb request.
  // As XHCI spec replaces this request with Address_Device command, we have to record the
  // requested device address and establish a mapping relationship with the actual device address.
  // Then UsbBus driver just need to be aware of the requested device address to access usb device
  // through EFI_USB2_HC_PROTOCOL. Xhci driver would be responsible for translating it to actual
  // device address and access the actual device.
  //
  UINT8                        BusDevAddr;
  //
  // The pointer to the input device context.
  //
  VOID                         *InputContext;
  //
  // The pointer to the output device context.
  //
  VOID                         *OutputContext;
  //
  // The transfer queue for every endpoint.
  //
  VOID                         *EndpointTransferRing[31];
  //
  // The device descriptor which is stored to support XHCI's Evaluate_Context cmd.
  //
  EFI_USB_DEVICE_DESCRIPTOR    DevDesc;
  //
  // As a usb device may include multiple configuration descriptors, we dynamically allocate an array
  // to store them.
  // Note that every configuration descriptor stored here includes those lower level descriptors,
  // such as Interface descriptor, Endpoint descriptor, and so on.
  // These information is used to support XHCI's Config_Endpoint cmd.
  //
  EFI_USB_CONFIG_DESCRIPTOR    **ConfDesc;
  //
  // A device has an active Configuration.
  //
  UINT8                        ActiveConfiguration;
  //
  // Every interface has an active AlternateSetting.
  //
  UINT8                        *ActiveAlternateSetting;
};

struct _USB_XHCI_INSTANCE {
  UINT32                      Signature;
  EFI_PCI_IO_PROTOCOL         *PciIo;
  UINT64                      OriginalPciAttributes;
  USBHC_MEM_POOL              *MemPool;

  EFI_USB2_HC_PROTOCOL        Usb2Hc;

  EFI_DEVICE_PATH_PROTOCOL    *DevicePath;

  //
  // ExitBootServicesEvent is used to set OS semaphore and
  // stop the XHC DMA operation after exit boot service.
  //
  EFI_EVENT                   ExitBootServiceEvent;
  EFI_EVENT                   PollTimer;
  LIST_ENTRY                  AsyncIntTransfers;

  UINT8                       CapLength;  ///< Capability Register Length
  XHC_HCSPARAMS1              HcSParams1; ///< Structural Parameters 1
  XHC_HCSPARAMS2              HcSParams2; ///< Structural Parameters 2
  XHC_HCCPARAMS               HcCParams;  ///< Capability Parameters
  UINT32                      DBOff;      ///< Doorbell Offset
  UINT32                      RTSOff;     ///< Runtime Register Space Offset
  UINT16                      MaxInterrupt;
  UINT32                      PageSize;
  UINT64                      *ScratchBuf;
  VOID                        *ScratchMap;
  UINT32                      MaxScratchpadBufs;
  UINT64                      *ScratchEntry;
  UINTN                       *ScratchEntryMap;
  UINT32                      ExtCapRegBase;
  UINT32                      UsbLegSupOffset;
  UINT32                      DebugCapSupOffset;
  UINT32                      Usb2SupOffset;
  UINT32                      Usb3SupOffset;
  UINT64                      *DCBAA;
  VOID                        *DCBAAMap;
  UINT32                      MaxSlotsEn;
  URB                         *PendingUrb;
  //
  // Cmd Transfer Ring
  //
  TRANSFER_RING               CmdRing;
  //
  // EventRing
  //
  EVENT_RING                  EventRing;
  //
  // Misc
  //
  EFI_UNICODE_STRING_TABLE    *ControllerNameTable;

  //
  // Store device contexts managed by XHCI instance
  // The array supports up to 255 devices, entry 0 is reserved and should not be used.
  //
  USB_DEV_CONTEXT             UsbDevContext[256];

  BOOLEAN                     Support64BitDma; // Whether 64 bit DMA may be used with this device
};

extern EFI_DRIVER_BINDING_PROTOCOL   gXhciDriverBinding;
extern EFI_COMPONENT_NAME_PROTOCOL   gXhciComponentName;
extern EFI_COMPONENT_NAME2_PROTOCOL  gXhciComponentName2;

/**
  Test to see if this driver supports ControllerHandle. Any
  ControllerHandle that has Usb2HcProtocol installed will
  be supported.

  @param  This                 Protocol instance pointer.
  @param  Controller           Handle of device to test.
  @param  RemainingDevicePath  Not used.

  @return EFI_SUCCESS          This driver supports this device.
  @return EFI_UNSUPPORTED      This driver does not support this device.

**/
EFI_STATUS
EFIAPI
XhcDriverBindingSupported (
  IN EFI_DRIVER_BINDING_PROTOCOL  *This,
  IN EFI_HANDLE                   Controller,
  IN EFI_DEVICE_PATH_PROTOCOL     *RemainingDevicePath
  );

/**
  Starting the Usb XHCI Driver.

  @param  This                 Protocol instance pointer.
  @param  Controller           Handle of device to test.
  @param  RemainingDevicePath  Not used.

  @return EFI_SUCCESS          supports this device.
  @return EFI_UNSUPPORTED      do not support this device.
  @return EFI_DEVICE_ERROR     cannot be started due to device Error.
  @return EFI_OUT_OF_RESOURCES cannot allocate resources.

**/
EFI_STATUS
EFIAPI
XhcDriverBindingStart (
  IN EFI_DRIVER_BINDING_PROTOCOL  *This,
  IN EFI_HANDLE                   Controller,
  IN EFI_DEVICE_PATH_PROTOCOL     *RemainingDevicePath
  );

/**
  Stop this driver on ControllerHandle. Support stopping any child handles
  created by this driver.

  @param  This                 Protocol instance pointer.
  @param  Controller           Handle of device to stop driver on.
  @param  NumberOfChildren     Number of Children in the ChildHandleBuffer.
  @param  ChildHandleBuffer    List of handles for the children we need to stop.

  @return EFI_SUCCESS          Success.
  @return EFI_DEVICE_ERROR     Fail.

**/
EFI_STATUS
EFIAPI
XhcDriverBindingStop (
  IN EFI_DRIVER_BINDING_PROTOCOL  *This,
  IN EFI_HANDLE                   Controller,
  IN UINTN                        NumberOfChildren,
  IN EFI_HANDLE                   *ChildHandleBuffer
  );

/**
  Retrieves the capability of root hub ports.

  @param  This                  The EFI_USB2_HC_PROTOCOL instance.
  @param  MaxSpeed              Max speed supported by the controller.
  @param  PortNumber            Number of the root hub ports.
  @param  Is64BitCapable        Whether the controller supports 64-bit memory
                                addressing.

  @retval EFI_SUCCESS           Host controller capability were retrieved successfully.
  @retval EFI_INVALID_PARAMETER Either of the three capability pointer is NULL.

**/
EFI_STATUS
EFIAPI
XhcGetCapability (
  IN  EFI_USB2_HC_PROTOCOL  *This,
  OUT UINT8                 *MaxSpeed,
  OUT UINT8                 *PortNumber,
  OUT UINT8                 *Is64BitCapable
  );

/**
  Provides software reset for the USB host controller.

  @param  This                  This EFI_USB2_HC_PROTOCOL instance.
  @param  Attributes            A bit mask of the reset operation to perform.

  @retval EFI_SUCCESS           The reset operation succeeded.
  @retval EFI_INVALID_PARAMETER Attributes is not valid.
  @retval EFI_UNSUPPOURTED      The type of reset specified by Attributes is
                                not currently supported by the host controller.
  @retval EFI_DEVICE_ERROR      Host controller isn't halted to reset.

**/
EFI_STATUS
EFIAPI
XhcReset (
  IN EFI_USB2_HC_PROTOCOL  *This,
  IN UINT16                Attributes
  );

/**
  Retrieve the current state of the USB host controller.

  @param  This                   This EFI_USB2_HC_PROTOCOL instance.
  @param  State                  Variable to return the current host controller
                                 state.

  @retval EFI_SUCCESS            Host controller state was returned in State.
  @retval EFI_INVALID_PARAMETER  State is NULL.
  @retval EFI_DEVICE_ERROR       An error was encountered while attempting to
                                 retrieve the host controller's current state.

**/
EFI_STATUS
EFIAPI
XhcGetState (
  IN  EFI_USB2_HC_PROTOCOL  *This,
  OUT EFI_USB_HC_STATE      *State
  );

/**
  Sets the USB host controller to a specific state.

  @param  This                  This EFI_USB2_HC_PROTOCOL instance.
  @param  State                 The state of the host controller that will be set.

  @retval EFI_SUCCESS           The USB host controller was successfully placed
                                in the state specified by State.
  @retval EFI_INVALID_PARAMETER State is invalid.
  @retval EFI_DEVICE_ERROR      Failed to set the state due to device error.

**/
EFI_STATUS
EFIAPI
XhcSetState (
  IN EFI_USB2_HC_PROTOCOL  *This,
  IN EFI_USB_HC_STATE      State
  );

/**
  Retrieves the current status of a USB root hub port.

  @param  This                  This EFI_USB2_HC_PROTOCOL instance.
  @param  PortNumber            The root hub port to retrieve the state from.
                                This value is zero-based.
  @param  PortStatus            Variable to receive the port state.

  @retval EFI_SUCCESS           The status of the USB root hub port specified.
                                by PortNumber was returned in PortStatus.
  @retval EFI_INVALID_PARAMETER PortNumber is invalid.
  @retval EFI_DEVICE_ERROR      Can't read register.

**/
EFI_STATUS
EFIAPI
XhcGetRootHubPortStatus (
  IN  EFI_USB2_HC_PROTOCOL  *This,
  IN  UINT8                 PortNumber,
  OUT EFI_USB_PORT_STATUS   *PortStatus
  );

/**
  Sets a feature for the specified root hub port.

  @param  This                  This EFI_USB2_HC_PROTOCOL instance.
  @param  PortNumber            Root hub port to set.
  @param  PortFeature           Feature to set.

  @retval EFI_SUCCESS           The feature specified by PortFeature was set.
  @retval EFI_INVALID_PARAMETER PortNumber is invalid or PortFeature is invalid.
  @retval EFI_DEVICE_ERROR      Can't read register.

**/
EFI_STATUS
EFIAPI
XhcSetRootHubPortFeature (
  IN EFI_USB2_HC_PROTOCOL  *This,
  IN UINT8                 PortNumber,
  IN EFI_USB_PORT_FEATURE  PortFeature
  );

/**
  Clears a feature for the specified root hub port.

  @param  This                  A pointer to the EFI_USB2_HC_PROTOCOL instance.
  @param  PortNumber            Specifies the root hub port whose feature is
                                requested to be cleared.
  @param  PortFeature           Indicates the feature selector associated with the
                                feature clear request.

  @retval EFI_SUCCESS           The feature specified by PortFeature was cleared
                                for the USB root hub port specified by PortNumber.
  @retval EFI_INVALID_PARAMETER PortNumber is invalid or PortFeature is invalid.
  @retval EFI_DEVICE_ERROR      Can't read register.

**/
EFI_STATUS
EFIAPI
XhcClearRootHubPortFeature (
  IN EFI_USB2_HC_PROTOCOL  *This,
  IN UINT8                 PortNumber,
  IN EFI_USB_PORT_FEATURE  PortFeature
  );

/**
  Submits control transfer to a target USB device.

  @param  This                  This EFI_USB2_HC_PROTOCOL instance.
  @param  DeviceAddress         The target device address.
  @param  DeviceSpeed           Target device speed.
  @param  MaximumPacketLength   Maximum packet size the default control transfer
                                endpoint is capable of sending or receiving.
  @param  Request               USB device request to send.
  @param  TransferDirection     Specifies the data direction for the data stage
  @param  Data                  Data buffer to be transmitted or received from USB
                                device.
  @param  DataLength            The size (in bytes) of the data buffer.
  @param  Timeout               Indicates the maximum timeout, in millisecond.
  @param  Translator            Transaction translator to be used by this device.
  @param  TransferResult        Return the result of this control transfer.

  @retval EFI_SUCCESS           Transfer was completed successfully.
  @retval EFI_OUT_OF_RESOURCES  The transfer failed due to lack of resources.
  @retval EFI_INVALID_PARAMETER Some parameters are invalid.
  @retval EFI_TIMEOUT           Transfer failed due to timeout.
  @retval EFI_DEVICE_ERROR      Transfer failed due to host controller or device error.

**/
EFI_STATUS
EFIAPI
XhcControlTransfer (
  IN     EFI_USB2_HC_PROTOCOL                *This,
  IN     UINT8                               DeviceAddress,
  IN     UINT8                               DeviceSpeed,
  IN     UINTN                               MaximumPacketLength,
  IN     EFI_USB_DEVICE_REQUEST              *Request,
  IN     EFI_USB_DATA_DIRECTION              TransferDirection,
  IN OUT VOID                                *Data,
  IN OUT UINTN                               *DataLength,
  IN     UINTN                               Timeout,
  IN     EFI_USB2_HC_TRANSACTION_TRANSLATOR  *Translator,
  OUT    UINT32                              *TransferResult
  );

/**
  Submits bulk transfer to a bulk endpoint of a USB device.

  @param  This                  This EFI_USB2_HC_PROTOCOL instance.
  @param  DeviceAddress         Target device address.
  @param  EndPointAddress       Endpoint number and its direction in bit 7.
  @param  DeviceSpeed           Device speed, Low speed device doesn't support bulk
                                transfer.
  @param  MaximumPacketLength   Maximum packet size the endpoint is capable of
                                sending or receiving.
  @param  DataBuffersNumber     Number of data buffers prepared for the transfer.
  @param  Data                  Array of pointers to the buffers of data to transmit
                                from or receive into.
  @param  DataLength            The lenght of the data buffer.
  @param  DataToggle            On input, the initial data toggle for the transfer;
                                On output, it is updated to to next data toggle to
                                use of the subsequent bulk transfer.
  @param  Timeout               Indicates the maximum time, in millisecond, which
                                the transfer is allowed to complete.
  @param  Translator            A pointr to the transaction translator data.
  @param  TransferResult        A pointer to the detailed result information of the
                                bulk transfer.

  @retval EFI_SUCCESS           The transfer was completed successfully.
  @retval EFI_OUT_OF_RESOURCES  The transfer failed due to lack of resource.
  @retval EFI_INVALID_PARAMETER Some parameters are invalid.
  @retval EFI_TIMEOUT           The transfer failed due to timeout.
  @retval EFI_DEVICE_ERROR      The transfer failed due to host controller error.

**/
EFI_STATUS
EFIAPI
XhcBulkTransfer (
  IN     EFI_USB2_HC_PROTOCOL                *This,
  IN     UINT8                               DeviceAddress,
  IN     UINT8                               EndPointAddress,
  IN     UINT8                               DeviceSpeed,
  IN     UINTN                               MaximumPacketLength,
  IN     UINT8                               DataBuffersNumber,
  IN OUT VOID                                *Data[EFI_USB_MAX_BULK_BUFFER_NUM],
  IN OUT UINTN                               *DataLength,
  IN OUT UINT8                               *DataToggle,
  IN     UINTN                               Timeout,
  IN     EFI_USB2_HC_TRANSACTION_TRANSLATOR  *Translator,
  OUT    UINT32                              *TransferResult
  );

/**
  Submits an asynchronous interrupt transfer to an
  interrupt endpoint of a USB device.

  @param  This                  This EFI_USB2_HC_PROTOCOL instance.
  @param  DeviceAddress         Target device address.
  @param  EndPointAddress       Endpoint number and its direction encoded in bit 7
  @param  DeviceSpeed           Indicates device speed.
  @param  MaximumPacketLength   Maximum packet size the target endpoint is capable
  @param  IsNewTransfer         If TRUE, to submit an new asynchronous interrupt
                                transfer If FALSE, to remove the specified
                                asynchronous interrupt.
  @param  DataToggle            On input, the initial data toggle to use; on output,
                                it is updated to indicate the next data toggle.
  @param  PollingInterval       The he interval, in milliseconds, that the transfer
                                is polled.
  @param  DataLength            The length of data to receive at the rate specified
                                by  PollingInterval.
  @param  Translator            Transaction translator to use.
  @param  CallBackFunction      Function to call at the rate specified by
                                PollingInterval.
  @param  Context               Context to CallBackFunction.

  @retval EFI_SUCCESS           The request has been successfully submitted or canceled.
  @retval EFI_INVALID_PARAMETER Some parameters are invalid.
  @retval EFI_OUT_OF_RESOURCES  The request failed due to a lack of resources.
  @retval EFI_DEVICE_ERROR      The transfer failed due to host controller error.

**/
EFI_STATUS
EFIAPI
XhcAsyncInterruptTransfer (
  IN     EFI_USB2_HC_PROTOCOL                *This,
  IN     UINT8                               DeviceAddress,
  IN     UINT8                               EndPointAddress,
  IN     UINT8                               DeviceSpeed,
  IN     UINTN                               MaximumPacketLength,
  IN     BOOLEAN                             IsNewTransfer,
  IN OUT UINT8                               *DataToggle,
  IN     UINTN                               PollingInterval,
  IN     UINTN                               DataLength,
  IN     EFI_USB2_HC_TRANSACTION_TRANSLATOR  *Translator,
  IN     EFI_ASYNC_USB_TRANSFER_CALLBACK     CallBackFunction,
  IN     VOID                                *Context OPTIONAL
  );

/**
  Submits synchronous interrupt transfer to an interrupt endpoint
  of a USB device.

  @param  This                  This EFI_USB2_HC_PROTOCOL instance.
  @param  DeviceAddress         Target device address.
  @param  EndPointAddress       Endpoint number and its direction encoded in bit 7
  @param  DeviceSpeed           Indicates device speed.
  @param  MaximumPacketLength   Maximum packet size the target endpoint is capable
                                of sending or receiving.
  @param  Data                  Buffer of data that will be transmitted to  USB
                                device or received from USB device.
  @param  DataLength            On input, the size, in bytes, of the data buffer; On
                                output, the number of bytes transferred.
  @param  DataToggle            On input, the initial data toggle to use; on output,
                                it is updated to indicate the next data toggle.
  @param  Timeout               Maximum time, in second, to complete.
  @param  Translator            Transaction translator to use.
  @param  TransferResult        Variable to receive the transfer result.

  @return EFI_SUCCESS           The transfer was completed successfully.
  @return EFI_OUT_OF_RESOURCES  The transfer failed due to lack of resource.
  @return EFI_INVALID_PARAMETER Some parameters are invalid.
  @return EFI_TIMEOUT           The transfer failed due to timeout.
  @return EFI_DEVICE_ERROR      The failed due to host controller or device error

**/
EFI_STATUS
EFIAPI
XhcSyncInterruptTransfer (
  IN     EFI_USB2_HC_PROTOCOL                *This,
  IN     UINT8                               DeviceAddress,
  IN     UINT8                               EndPointAddress,
  IN     UINT8                               DeviceSpeed,
  IN     UINTN                               MaximumPacketLength,
  IN OUT VOID                                *Data,
  IN OUT UINTN                               *DataLength,
  IN OUT UINT8                               *DataToggle,
  IN     UINTN                               Timeout,
  IN     EFI_USB2_HC_TRANSACTION_TRANSLATOR  *Translator,
  OUT    UINT32                              *TransferResult
  );

/**
  Submits isochronous transfer to a target USB device.

  @param  This                 This EFI_USB2_HC_PROTOCOL instance.
  @param  DeviceAddress        Target device address.
  @param  EndPointAddress      End point address with its direction.
  @param  DeviceSpeed          Device speed, Low speed device doesn't support this
                               type.
  @param  MaximumPacketLength  Maximum packet size that the endpoint is capable of
                               sending or receiving.
  @param  DataBuffersNumber    Number of data buffers prepared for the transfer.
  @param  Data                 Array of pointers to the buffers of data that will
                               be transmitted to USB device or received from USB
                               device.
  @param  DataLength           The size, in bytes, of the data buffer.
  @param  Translator           Transaction translator to use.
  @param  TransferResult       Variable to receive the transfer result.

  @return EFI_UNSUPPORTED      Isochronous transfer is unsupported.

**/
EFI_STATUS
EFIAPI
XhcIsochronousTransfer (
  IN     EFI_USB2_HC_PROTOCOL                *This,
  IN     UINT8                               DeviceAddress,
  IN     UINT8                               EndPointAddress,
  IN     UINT8                               DeviceSpeed,
  IN     UINTN                               MaximumPacketLength,
  IN     UINT8                               DataBuffersNumber,
  IN OUT VOID                                *Data[EFI_USB_MAX_ISO_BUFFER_NUM],
  IN     UINTN                               DataLength,
  IN     EFI_USB2_HC_TRANSACTION_TRANSLATOR  *Translator,
  OUT    UINT32                              *TransferResult
  );

/**
  Submits Async isochronous transfer to a target USB device.

  @param  This                 This EFI_USB2_HC_PROTOCOL instance.
  @param  DeviceAddress        Target device address.
  @param  EndPointAddress      End point address with its direction.
  @param  DeviceSpeed          Device speed, Low speed device doesn't support this
                               type.
  @param  MaximumPacketLength  Maximum packet size that the endpoint is capable of
                               sending or receiving.
  @param  DataBuffersNumber    Number of data buffers prepared for the transfer.
  @param  Data                 Array of pointers to the buffers of data that will
                               be transmitted to USB device or received from USB
                               device.
  @param  DataLength           The size, in bytes, of the data buffer.
  @param  Translator           Transaction translator to use.
  @param  IsochronousCallBack  Function to be called when the transfer complete.
  @param  Context              Context passed to the call back function as
                               parameter.

  @return EFI_UNSUPPORTED      Isochronous transfer isn't supported.

**/
EFI_STATUS
EFIAPI
XhcAsyncIsochronousTransfer (
  IN     EFI_USB2_HC_PROTOCOL                *This,
  IN     UINT8                               DeviceAddress,
  IN     UINT8                               EndPointAddress,
  IN     UINT8                               DeviceSpeed,
  IN     UINTN                               MaximumPacketLength,
  IN     UINT8                               DataBuffersNumber,
  IN OUT VOID                                *Data[EFI_USB_MAX_ISO_BUFFER_NUM],
  IN     UINTN                               DataLength,
  IN     EFI_USB2_HC_TRANSACTION_TRANSLATOR  *Translator,
  IN     EFI_ASYNC_USB_TRANSFER_CALLBACK     IsochronousCallBack,
  IN     VOID                                *Context
  );

/**
  Converts a time in nanoseconds to a performance counter tick count.

  @param  Time  The time in nanoseconds to be converted to performance counter ticks.
  @return Time in nanoseconds converted to ticks.
**/
UINT64
XhcConvertTimeToTicks (
  UINT64  Time
  );

/**
  Computes and returns the elapsed ticks since PreviousTick. The
  value of PreviousTick is overwritten with the current performance
  counter value.

  @param  PreviousTick    Pointer to PreviousTick count.
  @return The elapsed ticks since PreviousCount. PreviousCount is
          overwritten with the current performance counter value.
**/
UINT64
XhcGetElapsedTicks (
  IN OUT UINT64  *PreviousTick
  );
