/** @file

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

Copyright (c) 2013 - 2018, Intel Corporation. All rights reserved.<BR>
SPDX-License-Identifier: BSD-2-Clause-Patent

**/

#ifndef _EFI_XHCI_MEM_H_
#define _EFI_XHCI_MEM_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 USB
// host controller. XHCI 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 host controller.

  @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