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Diffstat (limited to 'src/vendorcode/intel/edk2/UDK2017/MdePkg/Include/Protocol/PciHotPlugRequest.h')
| -rw-r--r-- | src/vendorcode/intel/edk2/UDK2017/MdePkg/Include/Protocol/PciHotPlugRequest.h | 170 |
1 files changed, 170 insertions, 0 deletions
diff --git a/src/vendorcode/intel/edk2/UDK2017/MdePkg/Include/Protocol/PciHotPlugRequest.h b/src/vendorcode/intel/edk2/UDK2017/MdePkg/Include/Protocol/PciHotPlugRequest.h new file mode 100644 index 0000000000..c96b789b56 --- /dev/null +++ b/src/vendorcode/intel/edk2/UDK2017/MdePkg/Include/Protocol/PciHotPlugRequest.h @@ -0,0 +1,170 @@ +/** @file + Provides services to notify the PCI bus driver that some events have happened + in a hot-plug controller (such as a PC Card socket, or PHPC), and to ask the + PCI bus driver to create or destroy handles for PCI-like devices. + + A hot-plug capable PCI bus driver should produce the EFI PCI Hot Plug Request + protocol. When a PCI device or a PCI-like device (for example, 32-bit PC Card) + is installed after PCI bus does the enumeration, the PCI bus driver can be + notified through this protocol. For example, when a 32-bit PC Card is inserted + into the PC Card socket, the PC Card bus driver can call interface of this + protocol to notify PCI bus driver to allocate resource and create handles for + this PC Card. + + The EFI_PCI_HOTPLUG_REQUEST_PROTOCOL is installed by the PCI bus driver on a + separate handle when PCI bus driver starts up. There is only one instance in + the system. Any driver that wants to use this protocol must locate it globally. + The EFI_PCI_HOTPLUG_REQUEST_PROTOCOL allows the driver of hot-plug controller, + for example, PC Card Bus driver, to notify PCI bus driver that an event has + happened in the hot-plug controller, and the PCI bus driver is requested to + create (add) or destroy (remove) handles for the specified PCI-like devices. + For example, when a 32-bit PC Card is inserted, this protocol interface will + be called with an add operation, and the PCI bus driver will enumerate and + start the devices inserted; when a 32-bit PC Card is removed, this protocol + interface will be called with a remove operation, and the PCI bus driver will + stop the devices and destroy their handles. The existence of this protocol + represents the capability of the PCI bus driver. If this protocol exists in + system, it means PCI bus driver is hot-plug capable, thus together with the + effort of PC Card bus driver, hot-plug of PC Card can be supported. Otherwise, + the hot-plug capability is not provided. + + Copyright (c) 2006 - 2009, Intel Corporation. All rights reserved.<BR> + This program and the accompanying materials + are licensed and made available under the terms and conditions of the BSD License + which accompanies this distribution. The full text of the license may be found at + http://opensource.org/licenses/bsd-license.php + + THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS, + WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED. + + @par Revision Reference: + This Protocol is defined in UEFI Platform Initialization Specification 1.2 + Volume 5: Standards + +**/ + +#ifndef __PCI_HOTPLUG_REQUEST_H_ +#define __PCI_HOTPLUG_REQUEST_H_ + +/// +/// Global ID for EFI_PCI_HOTPLUG_REQUEST_PROTOCOL +/// +#define EFI_PCI_HOTPLUG_REQUEST_PROTOCOL_GUID \ + { \ + 0x19cb87ab, 0x2cb9, 0x4665, {0x83, 0x60, 0xdd, 0xcf, 0x60, 0x54, 0xf7, 0x9d} \ + } + +/// +/// Forward declaration for EFI_PCI_HOTPLUG_REQUEST_PROTOCOL +/// +typedef struct _EFI_PCI_HOTPLUG_REQUEST_PROTOCOL EFI_PCI_HOTPLUG_REQUEST_PROTOCOL; + +/// +/// Enumeration of PCI hot plug operations +/// +typedef enum { + /// + /// The PCI bus driver is requested to create handles for the specified devices. + /// An array of EFI_HANDLE is returned, with a NULL element marking the end of + /// the array. + /// + EfiPciHotPlugRequestAdd, + + /// + /// The PCI bus driver is requested to destroy handles for the specified devices. + /// + EfiPciHotplugRequestRemove +} EFI_PCI_HOTPLUG_OPERATION; + +/** + This function is used to notify PCI bus driver that some events happened in a + hot-plug controller, and the PCI bus driver is requested to start or stop + specified PCI-like devices. + + This function allows the PCI bus driver to be notified to act as requested when + a hot-plug event has happened on the hot-plug controller. Currently, the + operations include add operation and remove operation. If it is a add operation, + the PCI bus driver will enumerate, allocate resources for devices behind the + hot-plug controller, and create handle for the device specified by RemainingDevicePath. + The RemainingDevicePath is an optional parameter. If it is not NULL, only the + specified device is started; if it is NULL, all devices behind the hot-plug + controller are started. The newly created handles of PC Card functions are + returned in the ChildHandleBuffer, together with the number of child handle in + NumberOfChildren. If it is a remove operation, when NumberOfChildren contains + a non-zero value, child handles specified in ChildHandleBuffer are stopped and + destroyed; otherwise, PCI bus driver is notified to stop managing the controller + handle. + + @param[in] This A pointer to the EFI_PCI_HOTPLUG_REQUEST_PROTOCOL + instance. + @param[in] Operation The operation the PCI bus driver is requested + to make. + @param[in] Controller The handle of the hot-plug controller. + @param[in] RemainingDevicePath The remaining device path for the PCI-like + hot-plug device. It only contains device + path nodes behind the hot-plug controller. + It is an optional parameter and only valid + when the Operation is a add operation. If + it is NULL, all devices behind the PC Card + socket are started. + @param[in,out] NumberOfChildren The number of child handles. For an add + operation, it is an output parameter. For + a remove operation, it's an input parameter. + When it contains a non-zero value, children + handles specified in ChildHandleBuffer are + destroyed. Otherwise, PCI bus driver is + notified to stop managing the controller + handle. + @param[in,out] ChildHandleBuffer The buffer which contains the child handles. + For an add operation, it is an output + parameter and contains all newly created + child handles. For a remove operation, it + contains child handles to be destroyed when + NumberOfChildren contains a non-zero value. + It can be NULL when NumberOfChildren is 0. + It's the caller's responsibility to allocate + and free memory for this buffer. + + @retval EFI_SUCCESS The handles for the specified device have been + created or destroyed as requested, and for an + add operation, the new handles are returned in + ChildHandleBuffer. + @retval EFI_INVALID_PARAMETER Operation is not a legal value. + @retval EFI_INVALID_PARAMETER Controller is NULL or not a valid handle. + @retval EFI_INVALID_PARAMETER NumberOfChildren is NULL. + @retval EFI_INVALID_PARAMETER ChildHandleBuffer is NULL while Operation is + remove and NumberOfChildren contains a non-zero + value. + @retval EFI_INVALID_PARAMETER ChildHandleBuffer is NULL while Operation is add. + @retval EFI_OUT_OF_RESOURCES There are no enough resources to start the + devices. +**/ +typedef +EFI_STATUS +(EFIAPI *EFI_PCI_HOTPLUG_REQUEST_NOTIFY)( + IN EFI_PCI_HOTPLUG_REQUEST_PROTOCOL *This, + IN EFI_PCI_HOTPLUG_OPERATION Operation, + IN EFI_HANDLE Controller, + IN EFI_DEVICE_PATH_PROTOCOL *RemainingDevicePath OPTIONAL, + IN OUT UINT8 *NumberOfChildren, + IN OUT EFI_HANDLE *ChildHandleBuffer + ); + +/// +/// Provides services to notify PCI bus driver that some events have happened in +/// a hot-plug controller (for example, PC Card socket, or PHPC), and ask PCI bus +/// driver to create or destroy handles for the PCI-like devices. +/// +struct _EFI_PCI_HOTPLUG_REQUEST_PROTOCOL { + /// + /// Notify the PCI bus driver that some events have happened in a hot-plug + /// controller (for example, PC Card socket, or PHPC), and ask PCI bus driver + /// to create or destroy handles for the PCI-like devices. See Section 0 for + /// a detailed description. + /// + EFI_PCI_HOTPLUG_REQUEST_NOTIFY Notify; +}; + +extern EFI_GUID gEfiPciHotPlugRequestProtocolGuid; + +#endif |