MdeModulePkg/Bus/Pci/XhciPei/UsbHcMem.h

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

Copyright (c) 2014, Intel Corporation. All rights reserved.<BR>

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

**/

#ifndef _EFI_PEI_XHCI_MEM_H_
#define _EFI_PEI_XHCI_MEM_H_

#include <Uefi.h>

#define USBHC_MEM_DEFAULT_PAGES  16

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;
};

//
// 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_ROUND(Len)  (((Len) + USBHC_MEM_UNIT_MASK) & (~USBHC_MEM_UNIT_MASK))

#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)))

//
// 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)

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

/**
  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.
  @param  Alignment     Alignment the size to USBHC_MEM_UNIT bytes.

  @return               The pci memory address

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

/**
  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.
  @param  Alignment     Alignment the size to USBHC_MEM_UNIT bytes.

  @return               The host memory address

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

/**
  Allocates pages at a specified alignment.

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

  @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 UINTN                  Pages,
  IN UINTN                  Alignment,
  OUT VOID                  **HostAddress,
  OUT EFI_PHYSICAL_ADDRESS  *DeviceAddress,
  OUT VOID                  **Mapping
  );

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

  @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 VOID   *HostAddress,
  IN UINTN  Pages,
  IN VOID   *Mapping
  );

#endif