diff options
Diffstat (limited to 'MdePkg/Include/Protocol/PciHotPlugRequest.h')
| -rw-r--r-- | MdePkg/Include/Protocol/PciHotPlugRequest.h | 120 |
1 files changed, 57 insertions, 63 deletions
diff --git a/MdePkg/Include/Protocol/PciHotPlugRequest.h b/MdePkg/Include/Protocol/PciHotPlugRequest.h index c96b789b5695..dff7f6e98039 100644 --- a/MdePkg/Include/Protocol/PciHotPlugRequest.h +++ b/MdePkg/Include/Protocol/PciHotPlugRequest.h @@ -1,46 +1,40 @@ /** @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 + 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 + 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 + 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 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 + 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 + 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. + the hot-plug capability is not provided. + + Copyright (c) 2006 - 2018, Intel Corporation. All rights reserved.<BR> + SPDX-License-Identifier: BSD-2-Clause-Patent @par Revision Reference: - This Protocol is defined in UEFI Platform Initialization Specification 1.2 + This Protocol is defined in UEFI Platform Initialization Specification 1.2 Volume 5: Standards - + **/ #ifndef __PCI_HOTPLUG_REQUEST_H_ @@ -61,7 +55,7 @@ typedef struct _EFI_PCI_HOTPLUG_REQUEST_PROTOCOL EFI_PCI_HOTPLUG_REQUEST_PROTOC /// /// Enumeration of PCI hot plug operations -/// +/// typedef enum { /// /// The PCI bus driver is requested to create handles for the specified devices. @@ -78,65 +72,65 @@ typedef enum { /** 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 + 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 + 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 + 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 + 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 + 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] 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. + 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 + 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 + @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 + 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 + @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 + + @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 + @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 + @retval EFI_OUT_OF_RESOURCES There are no enough resources to start the devices. **/ typedef @@ -151,15 +145,15 @@ EFI_STATUS ); /// -/// 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 +/// 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 + /// 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; |