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