616 lines
20 KiB
C
616 lines
20 KiB
C
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/** @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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#include "SioBusDxe.h"
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//
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// SioBus Driver Binding Protocol
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//
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EFI_DRIVER_BINDING_PROTOCOL gSioBusDriverBinding = {
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SioBusDriverBindingSupported,
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SioBusDriverBindingStart,
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SioBusDriverBindingStop,
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0x10,
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NULL,
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NULL
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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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EFI_STATUS Status;
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EFI_PCI_IO_PROTOCOL *PciIo;
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PCI_TYPE00 Pci;
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UINTN SegmentNumber;
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UINTN BusNumber;
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UINTN DeviceNumber;
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UINTN FunctionNumber;
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//
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// Get PciIo protocol instance
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//
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Status = gBS->OpenProtocol (
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Controller,
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&gEfiPciIoProtocolGuid,
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(VOID**)&PciIo,
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This->DriverBindingHandle,
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Controller,
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EFI_OPEN_PROTOCOL_BY_DRIVER
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);
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if (EFI_ERROR(Status)) {
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return Status;
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}
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Status = PciIo->Pci.Read (
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PciIo,
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EfiPciIoWidthUint32,
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0,
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sizeof(Pci) / sizeof(UINT32),
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&Pci);
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if (!EFI_ERROR (Status)) {
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Status = EFI_UNSUPPORTED;
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if ((Pci.Hdr.Command & 0x03) == 0x03) {
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if (Pci.Hdr.ClassCode[2] == PCI_CLASS_BRIDGE) {
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//
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// See if this is a standard PCI to ISA Bridge from the Base Code and
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// Class Code
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//
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if (Pci.Hdr.ClassCode[1] == PCI_CLASS_BRIDGE_ISA) {
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Status = EFI_SUCCESS;
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}
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//
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// See if this is an Intel PCI to ISA bridge in Positive Decode Mode
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//
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if (Pci.Hdr.ClassCode[1] == PCI_CLASS_BRIDGE_ISA_PDECODE &&
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Pci.Hdr.VendorId == 0x8086) {
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//
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// See if this is on Function #0 to avoid false positives on
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// PCI_CLASS_BRIDGE_OTHER that has the same value as
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// PCI_CLASS_BRIDGE_ISA_PDECODE
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//
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Status = PciIo->GetLocation (
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PciIo,
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&SegmentNumber,
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&BusNumber,
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&DeviceNumber,
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&FunctionNumber
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);
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if (!EFI_ERROR (Status) && FunctionNumber == 0) {
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Status = EFI_SUCCESS;
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} else {
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Status = EFI_UNSUPPORTED;
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}
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}
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}
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}
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}
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gBS->CloseProtocol (
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Controller,
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&gEfiPciIoProtocolGuid,
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This->DriverBindingHandle,
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Controller
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);
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return Status;
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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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EFI_STATUS Status;
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EFI_PCI_IO_PROTOCOL *PciIo;
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EFI_DEVICE_PATH_PROTOCOL *ParentDevicePath;
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UINT64 Supports;
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UINT64 OriginalAttributes;
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UINT64 Attributes;
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BOOLEAN Enabled;
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SIO_BUS_DRIVER_PRIVATE_DATA *Private;
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UINT32 ChildDeviceNumber;
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Enabled = FALSE;
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Supports = 0;
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OriginalAttributes = 0;
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Private = NULL;
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//
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// Open the PCI I/O Protocol Interface
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//
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PciIo = NULL;
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Status = gBS->OpenProtocol (
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Controller,
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&gEfiPciIoProtocolGuid,
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(VOID**) &PciIo,
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This->DriverBindingHandle,
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Controller,
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EFI_OPEN_PROTOCOL_BY_DRIVER
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);
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if (EFI_ERROR (Status)) {
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return Status;
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}
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//
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// Open Device Path Protocol
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//
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Status = gBS->OpenProtocol (
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Controller,
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&gEfiDevicePathProtocolGuid,
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(VOID **) &ParentDevicePath,
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This->DriverBindingHandle,
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Controller,
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EFI_OPEN_PROTOCOL_BY_DRIVER
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);
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if (EFI_ERROR (Status)) {
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gBS->CloseProtocol (
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Controller,
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&gEfiPciIoProtocolGuid,
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This->DriverBindingHandle,
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Controller
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);
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return Status;
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}
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//
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// Get supported PCI attributes
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//
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Status = PciIo->Attributes (
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PciIo,
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EfiPciIoAttributeOperationSupported,
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0,
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&Supports
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);
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if (EFI_ERROR (Status)) {
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goto Done;
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}
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Supports &= (UINT64) (EFI_PCI_IO_ATTRIBUTE_ISA_IO |
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EFI_PCI_IO_ATTRIBUTE_ISA_IO_16);
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if (Supports == 0 ||
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Supports == (EFI_PCI_IO_ATTRIBUTE_ISA_IO |
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EFI_PCI_IO_ATTRIBUTE_ISA_IO_16)) {
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Status = EFI_UNSUPPORTED;
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goto Done;
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}
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Status = PciIo->Attributes (
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PciIo,
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EfiPciIoAttributeOperationGet,
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0,
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&OriginalAttributes
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);
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if (EFI_ERROR (Status)) {
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goto Done;
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}
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Attributes = EFI_PCI_DEVICE_ENABLE |
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Supports |
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EFI_PCI_IO_ATTRIBUTE_ISA_MOTHERBOARD_IO;
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Status = PciIo->Attributes (
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PciIo,
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EfiPciIoAttributeOperationEnable,
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Attributes,
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NULL
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);
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if (EFI_ERROR (Status)) {
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goto Done;
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}
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Enabled = TRUE;
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//
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// Store the OriginalAttributes for the restore in BindingStop()
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//
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Private = AllocateZeroPool (sizeof (SIO_BUS_DRIVER_PRIVATE_DATA));
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if (Private == NULL) {
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Status = EFI_OUT_OF_RESOURCES;
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goto Done;
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}
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Private->PciIo = PciIo;
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Private->OriginalAttributes = OriginalAttributes;
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Status = gBS->InstallProtocolInterface (
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&Controller,
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&gEfiCallerIdGuid,
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EFI_NATIVE_INTERFACE,
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Private
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);
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if (EFI_ERROR (Status)) {
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goto Done;
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}
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//
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// Report status code for the start of general controller initialization
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//
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REPORT_STATUS_CODE_WITH_DEVICE_PATH (
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EFI_PROGRESS_CODE,
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(EFI_IO_BUS_LPC | EFI_IOB_PC_INIT),
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ParentDevicePath
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);
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//
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// Report status code for the start of enabling devices on the bus
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//
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REPORT_STATUS_CODE_WITH_DEVICE_PATH (
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EFI_PROGRESS_CODE,
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(EFI_IO_BUS_LPC | EFI_IOB_PC_ENABLE),
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ParentDevicePath
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);
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//
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// Create all the children upon the first entrance
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//
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ChildDeviceNumber = SioCreateAllChildDevices (
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This,
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Controller,
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PciIo,
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ParentDevicePath
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);
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if (ChildDeviceNumber == 0) {
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Status = EFI_DEVICE_ERROR;
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}
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Done:
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if (EFI_ERROR (Status)) {
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if (PciIo != NULL && Enabled) {
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PciIo->Attributes (
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PciIo,
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EfiPciIoAttributeOperationSet,
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OriginalAttributes,
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NULL
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);
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}
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gBS->CloseProtocol (
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Controller,
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&gEfiDevicePathProtocolGuid,
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This->DriverBindingHandle,
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Controller
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);
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gBS->CloseProtocol (
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Controller,
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&gEfiPciIoProtocolGuid,
|
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|
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This->DriverBindingHandle,
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||
|
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Controller
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);
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if (Private != NULL) {
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gBS->UninstallMultipleProtocolInterfaces (
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Controller,
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||
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&gEfiCallerIdGuid,
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||
|
|
Private,
|
||
|
|
NULL
|
||
|
|
);
|
||
|
|
FreePool (Private);
|
||
|
|
}
|
||
|
|
|
||
|
|
return Status;
|
||
|
|
}
|
||
|
|
|
||
|
|
return EFI_SUCCESS;
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
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
|
||
|
|
)
|
||
|
|
{
|
||
|
|
EFI_STATUS Status;
|
||
|
|
SIO_BUS_DRIVER_PRIVATE_DATA *Private;
|
||
|
|
UINTN Index;
|
||
|
|
BOOLEAN AllChildrenStopped;
|
||
|
|
EFI_SIO_PROTOCOL *Sio;
|
||
|
|
SIO_DEV *SioDevice;
|
||
|
|
EFI_PCI_IO_PROTOCOL *PciIo;
|
||
|
|
|
||
|
|
if (NumberOfChildren == 0) {
|
||
|
|
//
|
||
|
|
// Restore PCI attributes
|
||
|
|
//
|
||
|
|
Status = gBS->OpenProtocol (
|
||
|
|
Controller,
|
||
|
|
&gEfiCallerIdGuid,
|
||
|
|
(VOID **) &Private,
|
||
|
|
This->DriverBindingHandle,
|
||
|
|
Controller,
|
||
|
|
EFI_OPEN_PROTOCOL_GET_PROTOCOL
|
||
|
|
);
|
||
|
|
if (EFI_ERROR (Status)) {
|
||
|
|
return Status;
|
||
|
|
}
|
||
|
|
|
||
|
|
Status = Private->PciIo->Attributes (
|
||
|
|
Private->PciIo,
|
||
|
|
EfiPciIoAttributeOperationSet,
|
||
|
|
Private->OriginalAttributes,
|
||
|
|
NULL
|
||
|
|
);
|
||
|
|
if (EFI_ERROR (Status)) {
|
||
|
|
return Status;
|
||
|
|
}
|
||
|
|
|
||
|
|
gBS->UninstallProtocolInterface (
|
||
|
|
Controller,
|
||
|
|
&gEfiCallerIdGuid,
|
||
|
|
Private
|
||
|
|
);
|
||
|
|
FreePool (Private);
|
||
|
|
|
||
|
|
//
|
||
|
|
// Close the bus driver
|
||
|
|
//
|
||
|
|
Status = gBS->CloseProtocol (
|
||
|
|
Controller,
|
||
|
|
&gEfiDevicePathProtocolGuid,
|
||
|
|
This->DriverBindingHandle,
|
||
|
|
Controller
|
||
|
|
);
|
||
|
|
if (EFI_ERROR (Status)) {
|
||
|
|
return Status;
|
||
|
|
}
|
||
|
|
|
||
|
|
Status = gBS->CloseProtocol (
|
||
|
|
Controller,
|
||
|
|
&gEfiPciIoProtocolGuid,
|
||
|
|
This->DriverBindingHandle,
|
||
|
|
Controller
|
||
|
|
);
|
||
|
|
if (EFI_ERROR (Status)) {
|
||
|
|
return Status;
|
||
|
|
}
|
||
|
|
|
||
|
|
return EFI_SUCCESS;
|
||
|
|
}
|
||
|
|
|
||
|
|
//
|
||
|
|
// Stop all the children
|
||
|
|
//
|
||
|
|
AllChildrenStopped = TRUE;
|
||
|
|
|
||
|
|
for (Index = 0; Index < NumberOfChildren; Index++) {
|
||
|
|
Status = gBS->OpenProtocol (
|
||
|
|
ChildHandleBuffer[Index],
|
||
|
|
&gEfiSioProtocolGuid,
|
||
|
|
(VOID **) &Sio,
|
||
|
|
This->DriverBindingHandle,
|
||
|
|
Controller,
|
||
|
|
EFI_OPEN_PROTOCOL_GET_PROTOCOL
|
||
|
|
);
|
||
|
|
if (!EFI_ERROR (Status)) {
|
||
|
|
SioDevice = SIO_DEV_FROM_SIO (Sio);
|
||
|
|
|
||
|
|
//
|
||
|
|
// Close the child handle
|
||
|
|
//
|
||
|
|
Status = gBS->CloseProtocol (
|
||
|
|
Controller,
|
||
|
|
&gEfiPciIoProtocolGuid,
|
||
|
|
This->DriverBindingHandle,
|
||
|
|
ChildHandleBuffer[Index]
|
||
|
|
);
|
||
|
|
Status = gBS->UninstallMultipleProtocolInterfaces (
|
||
|
|
ChildHandleBuffer[Index],
|
||
|
|
&gEfiDevicePathProtocolGuid,
|
||
|
|
SioDevice->DevicePath,
|
||
|
|
&gEfiSioProtocolGuid,
|
||
|
|
&SioDevice->Sio,
|
||
|
|
NULL
|
||
|
|
);
|
||
|
|
|
||
|
|
if (!EFI_ERROR (Status)) {
|
||
|
|
FreePool (SioDevice->DevicePath);
|
||
|
|
FreePool (SioDevice);
|
||
|
|
} else {
|
||
|
|
//
|
||
|
|
// Re-open PCI IO Protocol on behalf of the child device
|
||
|
|
// because of failure of destroying the child device handle
|
||
|
|
//
|
||
|
|
gBS->OpenProtocol (
|
||
|
|
Controller,
|
||
|
|
&gEfiPciIoProtocolGuid,
|
||
|
|
(VOID **) &PciIo,
|
||
|
|
This->DriverBindingHandle,
|
||
|
|
ChildHandleBuffer[Index],
|
||
|
|
EFI_OPEN_PROTOCOL_BY_CHILD_CONTROLLER
|
||
|
|
);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
if (EFI_ERROR (Status)) {
|
||
|
|
AllChildrenStopped = FALSE;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
if (!AllChildrenStopped) {
|
||
|
|
return EFI_DEVICE_ERROR;
|
||
|
|
}
|
||
|
|
|
||
|
|
return EFI_SUCCESS;
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
The entry point for the SioBusDxe driver.
|
||
|
|
|
||
|
|
@param[in] ImageHandle The firmware allocated handle for the EFI image.
|
||
|
|
@param[in] SystemTable A pointer to the EFI System Table.
|
||
|
|
|
||
|
|
@retval EFI_SUCCESS The entry point is executed successfully.
|
||
|
|
@retval other Some error occurs when executing this entry point.
|
||
|
|
|
||
|
|
**/
|
||
|
|
EFI_STATUS
|
||
|
|
EFIAPI
|
||
|
|
SioBusDxeDriverEntryPoint (
|
||
|
|
IN EFI_HANDLE ImageHandle,
|
||
|
|
IN EFI_SYSTEM_TABLE *SystemTable
|
||
|
|
)
|
||
|
|
{
|
||
|
|
//
|
||
|
|
// Install driver model protocol(s).
|
||
|
|
//
|
||
|
|
return EfiLibInstallDriverBindingComponentName2 (
|
||
|
|
ImageHandle,
|
||
|
|
SystemTable,
|
||
|
|
&gSioBusDriverBinding,
|
||
|
|
ImageHandle,
|
||
|
|
&gSioBusComponentName,
|
||
|
|
&gSioBusComponentName2
|
||
|
|
);
|
||
|
|
}
|