alder_lake_bios/Intel/AlderLake/AlderLakePlatSamplePkg/Features/Usb4Cm/Include/Usb4HcMem.h

/** @file
  This file contains the definination for host controller memory management routines.

@copyright
  INTEL CONFIDENTIAL
  Copyright 2021 Intel Corporation.

  The source code contained or described herein and all documents related to the
  source code ("Material") are owned by Intel Corporation or its suppliers or
  licensors. Title to the Material remains with Intel Corporation or its suppliers
  and licensors. The Material may contain trade secrets and proprietary and
  confidential information of Intel Corporation and its suppliers and licensors,
  and is protected by worldwide copyright and trade secret laws and treaty
  provisions. No part of the Material may be used, copied, reproduced, modified,
  published, uploaded, posted, transmitted, distributed, or disclosed in any way
  without Intel's prior express written permission.

  No license under any patent, copyright, trade secret or other intellectual
  property right is granted to or conferred upon you by disclosure or delivery
  of the Materials, either expressly, by implication, inducement, estoppel or
  otherwise. Any license under such intellectual property rights must be
  express and approved by Intel in writing.

  Unless otherwise agreed by Intel in writing, you may not remove or alter
  this notice or any other notice embedded in Materials by Intel or
  Intel's suppliers or licensors in any way.

  This file contains a 'Sample Driver' and is licensed as such under the terms
  of your license agreement with Intel or your vendor. This file may be modified
  by the user, subject to the additional terms of the license agreement.

@par Specification Reference:
**/

#ifndef _EFI_USB4_MEM_H_
#define _EFI_USB4_MEM_H_

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

#define USB_HC_BIT(a)                  ((UINTN)(1 << (a)))

#define USB_HC_BIT_IS_SET(Data, Bit)   \
          ((BOOLEAN)(((Data) & USB_HC_BIT(Bit)) == USB_HC_BIT(Bit)))

typedef struct _USBHC_MEM_BLOCK USBHC_MEM_BLOCK;
struct _USBHC_MEM_BLOCK {
  UINT8                   *Bits;    // Bit array to record which unit is allocated
  UINTN                   BitsLen;
  UINT8                   *Buf;
  UINT8                   *BufHost;
  UINTN                   BufLen;   // Memory size in bytes
  VOID                    *Mapping;
  USBHC_MEM_BLOCK         *Next;
};

//
// USBHC_MEM_POOL is used to manage the memory used by USB4 controller
// host . USB4 requires the control memory and transfer
// data to be on the same 4G memory.
//
typedef struct _USBHC_MEM_POOL {
  EFI_PCI_IO_PROTOCOL     *PciIo;
  BOOLEAN                 Check4G;
  UINT32                  Which4G;
  USBHC_MEM_BLOCK         *Head;
} USBHC_MEM_POOL;

//
// Memory allocation unit, must be 2^n, n>4
//
#define USBHC_MEM_UNIT           64

#define USBHC_MEM_UNIT_MASK      (USBHC_MEM_UNIT - 1)
#define USBHC_MEM_DEFAULT_PAGES  16

#define USBHC_MEM_ROUND(Len)  (((Len) + USBHC_MEM_UNIT_MASK) & (~USBHC_MEM_UNIT_MASK))

//
// Advance the byte and bit to the next bit, adjust byte accordingly.
//
#define NEXT_BIT(Byte, Bit)   \
          do {                \
            (Bit)++;          \
            if ((Bit) > 7) {  \
              (Byte)++;       \
              (Bit) = 0;      \
            }                 \
          } while (0)



/**
  Initialize the memory management pool for the host controller.

 *@param  PciIo               The PciIo that can be used to access the USB4 host controller after PCI bus enumeration
 *                            done if it is not NULL.

  @retval EFI_SUCCESS         The memory pool is initialized.
  @retval EFI_OUT_OF_RESOURCE Fail to init the memory pool.

**/
USBHC_MEM_POOL *
UsbHcInitMemPool (
  IN EFI_PCI_IO_PROTOCOL  *PciIo
  );


/**
  Release the memory management pool.

  @param   Pool               The USB memory pool to free.

  @retval EFI_SUCCESS       The memory pool is freed.
  @retval EFI_DEVICE_ERROR  Failed to free the memory pool.

**/
EFI_STATUS
UsbHcFreeMemPool (
  IN USBHC_MEM_POOL       *Pool
  );


/**
  Allocate some memory from the host controller's memory pool
  which can be used to communicate with host controller.

  @param  Pool  The host controller's memory pool.
  @param  Size  Size of the memory to allocate.

  @return The allocated memory or NULL.

**/
VOID *
UsbHcAllocateMem (
  IN  USBHC_MEM_POOL      *Pool,
  IN  UINTN               Size
  );


/**
  Free the allocated memory back to the memory pool.

  @param  Pool  The memory pool of the host controller.
  @param  Mem   The memory to free.
  @param  Size  The size of the memory to free.

**/
VOID
UsbHcFreeMem (
  IN USBHC_MEM_POOL       *Pool,
  IN VOID                 *Mem,
  IN UINTN                Size
  );

/**
  Calculate the corresponding pci bus address according to the Mem parameter.

  @param  Pool           The memory pool of the host controller.
  @param  Mem            The pointer to host memory.
  @param  Size           The size of the memory region.

  @return                The pci memory address

**/
EFI_PHYSICAL_ADDRESS
UsbHcGetPciAddrForHostAddr (
  IN USBHC_MEM_POOL       *Pool,
  IN VOID                 *Mem,
  IN UINTN                Size
  );

/**
  Calculate the corresponding host address according to the pci address.

  @param  Pool           The memory pool of the host controller.
  @param  Mem            The pointer to pci memory.
  @param  Size           The size of the memory region.

  @return                The host memory address

**/
EFI_PHYSICAL_ADDRESS
UsbHcGetHostAddrForPciAddr (
  IN USBHC_MEM_POOL       *Pool,
  IN VOID                 *Mem,
  IN UINTN                Size
  );

/**
  Allocates pages at a specified alignment that are suitable for an EfiPciIoOperationBusMasterCommonBuffer mapping.

  If Alignment is not a power of two and Alignment is not zero, then ASSERT().

  @param  PciIo                 The PciIo that can be used to access the host controller.
  @param  Pages                 The number of pages to allocate.
  @param  Alignment             The requested alignment of the allocation.  Must be a power of two.
  @param  HostAddress           The system memory address to map to the PCI controller.
  @param  DeviceAddress         The resulting map address for the bus master PCI controller to
                                use to access the hosts HostAddress.
  @param  Mapping               A resulting value to pass to Unmap().

  @retval EFI_SUCCESS           Success to allocate aligned pages.
  @retval EFI_INVALID_PARAMETER Pages or Alignment is not valid.
  @retval EFI_OUT_OF_RESOURCES  Do not have enough resources to allocate memory.


**/
EFI_STATUS
UsbHcAllocateAlignedPages (
  IN EFI_PCI_IO_PROTOCOL    *PciIo,
  IN UINTN                  Pages,
  IN UINTN                  Alignment,
  OUT VOID                  **HostAddress,
  OUT EFI_PHYSICAL_ADDRESS  *DeviceAddress,
  OUT VOID                  **Mapping
  );

/**
  Frees memory that was allocated with UsbHcAllocateAlignedPages().

  @param  PciIo                 The PciIo that can be used to access the host controller.
  @param  HostAddress           The system memory address to map to the PCI controller.
  @param  Pages                 The number of pages to free.
  @param  Mapping               The mapping value returned from Map().

**/
VOID
UsbHcFreeAlignedPages (
  IN EFI_PCI_IO_PROTOCOL    *PciIo,
  IN VOID                   *HostAddress,
  IN UINTN                  Pages,
  VOID                      *Mapping
  );

#endif