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CloverBootloader/OvmfPkg/SioBusDxe/SioBusDxe.h

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/** @file
The SioBusDxe driver is used to create child devices on the ISA bus and
installs the Super I/O protocols on them.
Copyright (c) 2019, Intel Corporation. All rights reserved.<BR>
SPDX-License-Identifier: BSD-2-Clause-Patent
**/
#ifndef __SIO_BUS_DXE_H__
#define __SIO_BUS_DXE_H__
#include <Uefi.h>
#include <IndustryStandard/Pci.h>
#include <Protocol/PciIo.h>
#include <Protocol/SuperIo.h>
#include <Library/UefiDriverEntryPoint.h>
#include <Library/UefiLib.h>
#include <Library/UefiBootServicesTableLib.h>
#include <Library/DebugLib.h>
#include <Library/ReportStatusCodeLib.h>
#include <Library/MemoryAllocationLib.h>
#include <Library/BaseMemoryLib.h>
#include <Library/DevicePathLib.h>
#include "SioService.h"
//
// SIO Bus driver private data structure
//
typedef struct {
EFI_PCI_IO_PROTOCOL *PciIo;
UINT64 OriginalAttributes;
} SIO_BUS_DRIVER_PRIVATE_DATA;
//
// Global Variables
//
extern EFI_COMPONENT_NAME_PROTOCOL gSioBusComponentName;
extern EFI_COMPONENT_NAME2_PROTOCOL gSioBusComponentName2;
//
// EFI Component Name Functions
//
/**
Retrieves a Unicode string that is the user readable name of the driver.
This function retrieves the user readable name of a driver in the form of a
Unicode string. If the driver specified by This has a user readable name in
the language specified by Language, then a pointer to the driver name is
returned in DriverName, and EFI_SUCCESS is returned. If the driver specified
by This does not support the language specified by Language, then
EFI_UNSUPPORTED is returned.
@param[in] This A pointer to the EFI_COMPONENT_NAME2_PROTOCOL
or EFI_COMPONENT_NAME_PROTOCOL instance.
@param[in] Language A pointer to a Null-terminated ASCII string
array indicating the language. This is the
language of the driver name that the caller is
requesting, and it must match one of the
languages specified in SupportedLanguages. The
number of languages supported by a driver is up
to the driver writer. Language is specified
in RFC 4646 or ISO 639-2 language code format.
@param[out] DriverName A pointer to the Unicode string to return. This
Unicode string is the name of the driver
specified by This in the language specified by
Language.
@retval EFI_SUCCESS The Unicode string for the Driver specified by
This and the language specified by Language was
returned in DriverName.
@retval EFI_INVALID_PARAMETER Language is NULL.
@retval EFI_INVALID_PARAMETER DriverName is NULL.
@retval EFI_UNSUPPORTED The driver specified by This does not support
the language specified by Language.
**/
EFI_STATUS
EFIAPI
SioBusComponentNameGetDriverName (
IN EFI_COMPONENT_NAME_PROTOCOL *This,
IN CHAR8 *Language,
OUT CHAR16 **DriverName
);
/**
Retrieves a Unicode string that is the user readable name of the controller
that is being managed by a driver.
This function retrieves the user readable name of the controller specified by
ControllerHandle and ChildHandle in the form of a Unicode string. If the
driver specified by This has a user readable name in the language specified
by Language, then a pointer to the controller name is returned in
ControllerName, and EFI_SUCCESS is returned. If the driver specified by This
is not currently managing the controller specified by ControllerHandle and
ChildHandle, then EFI_UNSUPPORTED is returned. If the driver specified by
This does not support the language specified by Language, then
EFI_UNSUPPORTED is returned.
@param[in] This A pointer to the EFI_COMPONENT_NAME2_PROTOCOL
or EFI_COMPONENT_NAME_PROTOCOL instance.
@param[in] ControllerHandle The handle of a controller that the driver
specified by This is managing. This handle
specifies the controller whose name is to be
returned.
@param[in] ChildHandle The handle of the child controller to retrieve
the name of. This is an optional parameter
that may be NULL. It will be NULL for device
drivers. It will also be NULL for a bus
drivers that wish to retrieve the name of the
bus controller. It will not be NULL for a bus
driver that wishes to retrieve the name of a
child controller.
@param[in] Language A pointer to a Null-terminated ASCII string
array indicating the language. This is the
language of the driver name that the caller is
requesting, and it must match one of the
languages specified in SupportedLanguages. The
number of languages supported by a driver is up
to the driver writer. Language is specified in
RFC 4646 or ISO 639-2 language code format.
@param[out] ControllerName A pointer to the Unicode string to return.
This Unicode string is the name of the
controller specified by ControllerHandle and
ChildHandle in the language specified by
Language from the point of view of the driver
specified by This.
@retval EFI_SUCCESS The Unicode string for the user readable name
in the language specified by Language for the
driver specified by This was returned in
DriverName.
@retval EFI_INVALID_PARAMETER ControllerHandle is NULL.
@retval EFI_INVALID_PARAMETER ChildHandle is not NULL and it is not a valid
EFI_HANDLE.
@retval EFI_INVALID_PARAMETER Language is NULL.
@retval EFI_INVALID_PARAMETER ControllerName is NULL.
@retval EFI_UNSUPPORTED The driver specified by This is not currently
managing the controller specified by
ControllerHandle and ChildHandle.
@retval EFI_UNSUPPORTED The driver specified by This does not support
the language specified by Language.
**/
EFI_STATUS
EFIAPI
SioBusComponentNameGetControllerName (
IN EFI_COMPONENT_NAME_PROTOCOL *This,
IN EFI_HANDLE ControllerHandle,
IN EFI_HANDLE ChildHandle OPTIONAL,
IN CHAR8 *Language,
OUT CHAR16 **ControllerName
);
//
// Driver Binding Protocol interfaces
//
/**
Tests to see if this driver supports a given controller. If a child device is
provided, it further tests to see if this driver supports creating a handle
for the specified child device.
This function checks to see if the driver specified by This supports the
device specified by ControllerHandle. Drivers will typically use the device
path attached to ControllerHandle and/or the services from the bus I/O
abstraction attached to ControllerHandle to determine if the driver supports
ControllerHandle. This function may be called many times during platform
initialization. In order to reduce boot times, the tests performed by this
function must be very small, and take as little time as possible to execute.
This function must not change the state of any hardware devices, and this
function must be aware that the device specified by ControllerHandle may
already be managed by the same driver or a different driver. This function
must match its calls to AllocatePages() with FreePages(), AllocatePool() with
FreePool(), and OpenProtocol() with CloseProtocol(). Since ControllerHandle
may have been previously started by the same driver, if a protocol is already
in the opened state, then it must not be closed with CloseProtocol(). This is
required to guarantee the state of ControllerHandle is not modified by this
function.
@param[in] This A pointer to the EFI_DRIVER_BINDING_PROTOCOL
instance.
@param[in] ControllerHandle The handle of the controller to test. This
handle must support a protocol interface
that supplies an I/O abstraction to the
driver.
@param[in] RemainingDevicePath A pointer to the remaining portion of a
device path. This parameter is ignored by
device drivers, and is optional for bus
drivers. For bus drivers, if this parameter
is not NULL, then the bus driver must
determine if the bus controller specified by
ControllerHandle and the child controller
specified by RemainingDevicePath are both
supported by this bus driver.
@retval EFI_SUCCESS The device specified by ControllerHandle and
RemainingDevicePath is supported by the
driver specified by This.
@retval EFI_ALREADY_STARTED The device specified by ControllerHandle and
RemainingDevicePath is already being managed
by the driver specified by This.
@retval EFI_ACCESS_DENIED The device specified by ControllerHandle and
RemainingDevicePath is already being managed
by a different driver or an application that
requires exclusive access.
@retval EFI_UNSUPPORTED The device specified by ControllerHandle and
RemainingDevicePath is not supported by the
driver specified by This.
**/
EFI_STATUS
EFIAPI
SioBusDriverBindingSupported (
IN EFI_DRIVER_BINDING_PROTOCOL *This,
IN EFI_HANDLE Controller,
IN EFI_DEVICE_PATH_PROTOCOL *RemainingDevicePath
);
/**
Starts a device controller or a bus controller.
The Start() function is designed to be invoked from the EFI boot service
ConnectController(). As a result, much of the error checking on the
parameters to Start() has been moved into this common boot service. It is
legal to call Start() from other locations, but the following calling
restrictions must be followed or the system behavior will not be
deterministic.
1. ControllerHandle must be a valid EFI_HANDLE.
2. If RemainingDevicePath is not NULL, then it must be a pointer to a
naturally aligned EFI_DEVICE_PATH_PROTOCOL.
3. Prior to calling Start(), the Supported() function for the driver
specified by This must have been called with the same calling parameters,
and Supported() must have returned EFI_SUCCESS.
@param[in] This A pointer to the EFI_DRIVER_BINDING_PROTOCOL
instance.
@param[in] ControllerHandle The handle of the controller to start. This
handle must support a protocol interface
that supplies an I/O abstraction to the
driver.
@param[in] RemainingDevicePath A pointer to the remaining portion of a
device path. This parameter is ignored by
device drivers, and is optional for bus
drivers. For a bus driver, if this parameter
is NULL, then handles for all the children
of Controller are created by this driver. If
this parameter is not NULL and the first
Device Path Node is not the End of Device
Path Node, then only the handle for the
child device specified by the first Device
Path Node of RemainingDevicePath is created
by this driver. If the first Device Path
Node of RemainingDevicePath is the End of
Device Path Node, no child handle is created
by this driver.
@retval EFI_SUCCESS The device was started.
@retval EFI_DEVICE_ERROR The device could not be started due to a
device error.
@retval EFI_OUT_OF_RESOURCES The request could not be completed due to a
lack of resources.
@retval Others The driver failded to start the device.
**/
EFI_STATUS
EFIAPI
SioBusDriverBindingStart (
IN EFI_DRIVER_BINDING_PROTOCOL *This,
IN EFI_HANDLE Controller,
IN EFI_DEVICE_PATH_PROTOCOL *RemainingDevicePath
);
/**
Stops a device controller or a bus controller.
The Stop() function is designed to be invoked from the EFI boot service
DisconnectController(). As a result, much of the error checking on the
parameters to Stop() has been moved into this common boot service. It is
legal to call Stop() from other locations, but the following calling
restrictions must be followed or the system behavior will not be
deterministic.
1. ControllerHandle must be a valid EFI_HANDLE that was used on a previous
call to this same driver's Start() function.
2. The first NumberOfChildren handles of ChildHandleBuffer must all be a
valid EFI_HANDLE. In addition, all of these handles must have been created
in this driver's Start() function, and the Start() function must have
called OpenProtocol() on ControllerHandle with an Attribute of
EFI_OPEN_PROTOCOL_BY_CHILD_CONTROLLER.
@param[in] This A pointer to the EFI_DRIVER_BINDING_PROTOCOL
instance.
@param[in] ControllerHandle A handle to the device being stopped. The
handle must support a bus specific I/O
protocol for the driver to use to stop the
device.
@param[in] NumberOfChildren The number of child device handles in
ChildHandleBuffer.
@param[in] ChildHandleBuffer An array of child handles to be freed. May be
NULL if NumberOfChildren is 0.
@retval EFI_SUCCESS The device was stopped.
@retval EFI_DEVICE_ERROR The device could not be stopped due to a
device error.
**/
EFI_STATUS
EFIAPI
SioBusDriverBindingStop (
IN EFI_DRIVER_BINDING_PROTOCOL *This,
IN EFI_HANDLE Controller,
IN UINTN NumberOfChildren,
IN EFI_HANDLE *ChildHandleBuffer
);
#endif // __SIO_BUS_DXE_H__
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