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[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index] [Xen-devel] [PATCH v4 03/19] OvmfPkg: Add basic skeleton for the XenBus bus driver.
This includes Component Name and Driver Binding.
Contributed-under: TianoCore Contribution Agreement 1.0
Signed-off-by: Anthony PERARD <anthony.perard@xxxxxxxxxx>
Reviewed-by: Konrad Rzeszutek Wilk <konrad.wilk@xxxxxxxxxx>
---
Change in V4:
- Replace the license by the commonly used file header text.
- Add brief description for the driver.
Change in V3:
- enable compilation for Ia32 and Ia32X64
- fix version (driver binding)
Change in V2:
- Simple support of controller name.
- Cleaning up comments, files header.
- Add Licenses
- Rename XenbusDxe to XenBusDxe.
---
OvmfPkg/OvmfPkgIa32.dsc | 1 +
OvmfPkg/OvmfPkgIa32.fdf | 1 +
OvmfPkg/OvmfPkgIa32X64.dsc | 1 +
OvmfPkg/OvmfPkgIa32X64.fdf | 1 +
OvmfPkg/OvmfPkgX64.dsc | 1 +
OvmfPkg/OvmfPkgX64.fdf | 1 +
OvmfPkg/XenBusDxe/ComponentName.c | 174 ++++++++++++++++++++++
OvmfPkg/XenBusDxe/ComponentName.h | 94 ++++++++++++
OvmfPkg/XenBusDxe/DriverBinding.h | 128 ++++++++++++++++
OvmfPkg/XenBusDxe/XenBusDxe.c | 301 ++++++++++++++++++++++++++++++++++++++
OvmfPkg/XenBusDxe/XenBusDxe.h | 77 ++++++++++
OvmfPkg/XenBusDxe/XenBusDxe.inf | 59 ++++++++
12 files changed, 839 insertions(+)
create mode 100644 OvmfPkg/XenBusDxe/ComponentName.c
create mode 100644 OvmfPkg/XenBusDxe/ComponentName.h
create mode 100644 OvmfPkg/XenBusDxe/DriverBinding.h
create mode 100644 OvmfPkg/XenBusDxe/XenBusDxe.c
create mode 100644 OvmfPkg/XenBusDxe/XenBusDxe.h
create mode 100644 OvmfPkg/XenBusDxe/XenBusDxe.inf
diff --git a/OvmfPkg/OvmfPkgIa32.dsc b/OvmfPkg/OvmfPkgIa32.dsc
index 8527ece..c16aea2 100644
--- a/OvmfPkg/OvmfPkgIa32.dsc
+++ b/OvmfPkg/OvmfPkgIa32.dsc
@@ -428,6 +428,7 @@
OvmfPkg/VirtioBlkDxe/VirtioBlk.inf
OvmfPkg/VirtioScsiDxe/VirtioScsi.inf
OvmfPkg/QemuFlashFvbServicesRuntimeDxe/FvbServicesRuntimeDxe.inf
+ OvmfPkg/XenBusDxe/XenBusDxe.inf
OvmfPkg/EmuVariableFvbRuntimeDxe/Fvb.inf {
<LibraryClasses>
PlatformFvbLib|OvmfPkg/Library/EmuVariableFvbLib/EmuVariableFvbLib.inf
diff --git a/OvmfPkg/OvmfPkgIa32.fdf b/OvmfPkg/OvmfPkgIa32.fdf
index ef3cdef..0b75fd2 100644
--- a/OvmfPkg/OvmfPkgIa32.fdf
+++ b/OvmfPkg/OvmfPkgIa32.fdf
@@ -227,6 +227,7 @@ INF OvmfPkg/VirtioScsiDxe/VirtioScsi.inf
INF OvmfPkg/QemuFlashFvbServicesRuntimeDxe/FvbServicesRuntimeDxe.inf
INF OvmfPkg/EmuVariableFvbRuntimeDxe/Fvb.inf
INF MdeModulePkg/Universal/FaultTolerantWriteDxe/FaultTolerantWriteDxe.inf
+INF OvmfPkg/XenBusDxe/XenBusDxe.inf
!if $(SECURE_BOOT_ENABLE) == TRUE
INF SecurityPkg/VariableAuthenticated/RuntimeDxe/VariableRuntimeDxe.inf
diff --git a/OvmfPkg/OvmfPkgIa32X64.dsc b/OvmfPkg/OvmfPkgIa32X64.dsc
index 823f005..340ef00 100644
--- a/OvmfPkg/OvmfPkgIa32X64.dsc
+++ b/OvmfPkg/OvmfPkgIa32X64.dsc
@@ -435,6 +435,7 @@
OvmfPkg/VirtioBlkDxe/VirtioBlk.inf
OvmfPkg/VirtioScsiDxe/VirtioScsi.inf
OvmfPkg/QemuFlashFvbServicesRuntimeDxe/FvbServicesRuntimeDxe.inf
+ OvmfPkg/XenBusDxe/XenBusDxe.inf
OvmfPkg/EmuVariableFvbRuntimeDxe/Fvb.inf {
<LibraryClasses>
PlatformFvbLib|OvmfPkg/Library/EmuVariableFvbLib/EmuVariableFvbLib.inf
diff --git a/OvmfPkg/OvmfPkgIa32X64.fdf b/OvmfPkg/OvmfPkgIa32X64.fdf
index 375afac..146e57f 100644
--- a/OvmfPkg/OvmfPkgIa32X64.fdf
+++ b/OvmfPkg/OvmfPkgIa32X64.fdf
@@ -227,6 +227,7 @@ INF OvmfPkg/VirtioScsiDxe/VirtioScsi.inf
INF OvmfPkg/QemuFlashFvbServicesRuntimeDxe/FvbServicesRuntimeDxe.inf
INF OvmfPkg/EmuVariableFvbRuntimeDxe/Fvb.inf
INF MdeModulePkg/Universal/FaultTolerantWriteDxe/FaultTolerantWriteDxe.inf
+INF OvmfPkg/XenBusDxe/XenBusDxe.inf
!if $(SECURE_BOOT_ENABLE) == TRUE
INF SecurityPkg/VariableAuthenticated/RuntimeDxe/VariableRuntimeDxe.inf
diff --git a/OvmfPkg/OvmfPkgX64.dsc b/OvmfPkg/OvmfPkgX64.dsc
index 40c18de..74c799c 100644
--- a/OvmfPkg/OvmfPkgX64.dsc
+++ b/OvmfPkg/OvmfPkgX64.dsc
@@ -433,6 +433,7 @@
OvmfPkg/VirtioBlkDxe/VirtioBlk.inf
OvmfPkg/VirtioScsiDxe/VirtioScsi.inf
OvmfPkg/QemuFlashFvbServicesRuntimeDxe/FvbServicesRuntimeDxe.inf
+ OvmfPkg/XenBusDxe/XenBusDxe.inf
OvmfPkg/EmuVariableFvbRuntimeDxe/Fvb.inf {
<LibraryClasses>
PlatformFvbLib|OvmfPkg/Library/EmuVariableFvbLib/EmuVariableFvbLib.inf
diff --git a/OvmfPkg/OvmfPkgX64.fdf b/OvmfPkg/OvmfPkgX64.fdf
index a0c1ac1..8b6a80b 100644
--- a/OvmfPkg/OvmfPkgX64.fdf
+++ b/OvmfPkg/OvmfPkgX64.fdf
@@ -227,6 +227,7 @@ INF OvmfPkg/VirtioScsiDxe/VirtioScsi.inf
INF OvmfPkg/QemuFlashFvbServicesRuntimeDxe/FvbServicesRuntimeDxe.inf
INF OvmfPkg/EmuVariableFvbRuntimeDxe/Fvb.inf
INF MdeModulePkg/Universal/FaultTolerantWriteDxe/FaultTolerantWriteDxe.inf
+INF OvmfPkg/XenBusDxe/XenBusDxe.inf
!if $(SECURE_BOOT_ENABLE) == TRUE
INF SecurityPkg/VariableAuthenticated/RuntimeDxe/VariableRuntimeDxe.inf
diff --git a/OvmfPkg/XenBusDxe/ComponentName.c
b/OvmfPkg/XenBusDxe/ComponentName.c
new file mode 100644
index 0000000..4530509
--- /dev/null
+++ b/OvmfPkg/XenBusDxe/ComponentName.c
@@ -0,0 +1,174 @@
+/** @file
+ Component Name functions implementation for XenBus Bus driver.
+
+ Copyright (C) 2014, Citrix Ltd.
+
+ 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.
+
+**/
+
+#include "XenBusDxe.h"
+
+///
+/// Component Name Protocol instance
+///
+GLOBAL_REMOVE_IF_UNREFERENCED
+EFI_COMPONENT_NAME_PROTOCOL gXenBusDxeComponentName = {
+ (EFI_COMPONENT_NAME_GET_DRIVER_NAME) XenBusDxeComponentNameGetDriverName,
+
(EFI_COMPONENT_NAME_GET_CONTROLLER_NAME)XenBusDxeComponentNameGetControllerName,
+ "eng"
+};
+
+///
+/// Component Name 2 Protocol instance
+///
+GLOBAL_REMOVE_IF_UNREFERENCED
+EFI_COMPONENT_NAME2_PROTOCOL gXenBusDxeComponentName2 = {
+ XenBusDxeComponentNameGetDriverName,
+ XenBusDxeComponentNameGetControllerName,
+ "en"
+};
+
+///
+/// Table of driver names
+///
+GLOBAL_REMOVE_IF_UNREFERENCED
+EFI_UNICODE_STRING_TABLE mXenBusDxeDriverNameTable[] = {
+ { "eng;en", (CHAR16 *)L"XenBus Bus Driver" },
+ { NULL, NULL }
+};
+
+///
+/// Table of controller names
+///
+GLOBAL_REMOVE_IF_UNREFERENCED
+EFI_UNICODE_STRING_TABLE mXenBusDxeControllerNameTable[] = {
+ { "eng;en", (CHAR16 *)L"XenBus Controller" },
+ { NULL, NULL }
+};
+
+/**
+ Retrieves a Unicode string that is the user-readable name of the EFI Driver.
+
+ @param This A pointer to the EFI_COMPONENT_NAME_PROTOCOL instance.
+ @param Language A pointer to a three-character ISO 639-2 language
identifier.
+ This is the language of the driver name that 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.
+ @param 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
+XenBusDxeComponentNameGetDriverName (
+ IN EFI_COMPONENT_NAME2_PROTOCOL *This,
+ IN CHAR8 *Language,
+ OUT CHAR16 **DriverName
+ )
+{
+ return LookupUnicodeString2 (
+ Language,
+ This->SupportedLanguages,
+ mXenBusDxeDriverNameTable,
+ DriverName,
+ (BOOLEAN)(This != &gXenBusDxeComponentName2)
+ );
+}
+
+/**
+ Retrieves a Unicode string that is the user readable name of the controller
+ that is being managed by an EFI Driver.
+
+ @param This A pointer to the EFI_COMPONENT_NAME_PROTOCOL
instance.
+ @param 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 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 Language A pointer to a three character ISO 639-2 language
+ identifier. This is the language of the controller
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.
+ @param 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
+XenBusDxeComponentNameGetControllerName (
+ IN EFI_COMPONENT_NAME2_PROTOCOL *This,
+ IN EFI_HANDLE ControllerHandle,
+ IN EFI_HANDLE ChildHandle OPTIONAL,
+ IN CHAR8 *Language,
+ OUT CHAR16 **ControllerName
+ )
+{
+ EFI_STATUS Status;
+
+ if (ChildHandle != NULL) {
+ // TODO Get controller name for a child.
+ return EFI_UNSUPPORTED;
+ }
+
+ //
+ // Make sure this driver is currently managing ControllerHandle
+ //
+ Status = EfiTestManagedDevice (
+ ControllerHandle,
+ gXenBusDxeDriverBinding.DriverBindingHandle,
+ &gEfiPciIoProtocolGuid
+ );
+ if (EFI_ERROR (Status)) {
+ return Status;
+ }
+
+ //
+ // Lookup name of controller specified by ControllerHandle
+ //
+ return LookupUnicodeString2 (
+ Language,
+ This->SupportedLanguages,
+ mXenBusDxeControllerNameTable,
+ ControllerName,
+ (BOOLEAN)(This != &gXenBusDxeComponentName2)
+ );
+}
diff --git a/OvmfPkg/XenBusDxe/ComponentName.h
b/OvmfPkg/XenBusDxe/ComponentName.h
new file mode 100644
index 0000000..42c5b57
--- /dev/null
+++ b/OvmfPkg/XenBusDxe/ComponentName.h
@@ -0,0 +1,94 @@
+/** @file
+ Component Name functions declaration for XenBus Bus driver.
+
+ Copyright (C) 2014, Citrix Ltd.
+
+ 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.
+
+**/
+
+/**
+ Retrieves a Unicode string that is the user-readable name of the EFI Driver.
+
+ @param This A pointer to the EFI_COMPONENT_NAME_PROTOCOL instance.
+ @param Language A pointer to a three-character ISO 639-2 language
identifier.
+ This is the language of the driver name that 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.
+ @param 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
+XenBusDxeComponentNameGetDriverName (
+ IN EFI_COMPONENT_NAME2_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 an EFI Driver.
+
+ @param This A pointer to the EFI_COMPONENT_NAME_PROTOCOL
instance.
+ @param 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 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 Language A pointer to a three character ISO 639-2 language
+ identifier. This is the language of the controller
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.
+ @param 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
+XenBusDxeComponentNameGetControllerName (
+ IN EFI_COMPONENT_NAME2_PROTOCOL *This,
+ IN EFI_HANDLE ControllerHandle,
+ IN EFI_HANDLE ChildHandle OPTIONAL,
+ IN CHAR8 *Language,
+ OUT CHAR16 **ControllerName
+ );
diff --git a/OvmfPkg/XenBusDxe/DriverBinding.h
b/OvmfPkg/XenBusDxe/DriverBinding.h
new file mode 100644
index 0000000..693b5c0
--- /dev/null
+++ b/OvmfPkg/XenBusDxe/DriverBinding.h
@@ -0,0 +1,128 @@
+/** @file
+ Driver Binding functions declaration for XenBus Bus driver.
+
+ Copyright (C) 2014, Citrix Ltd.
+
+ 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.
+
+**/
+
+/**
+ 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.
+
+ @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.
+ Currently not implemented.
+ @retval EFI_UNSUPPORTED The device specified by ControllerHandle and
+ RemainingDevicePath is not supported by the
driver specified by This.
+**/
+EFI_STATUS
+EFIAPI
+XenBusDxeDriverBindingSupported (
+ IN EFI_DRIVER_BINDING_PROTOCOL *This,
+ IN EFI_HANDLE ControllerHandle,
+ IN EFI_DEVICE_PATH_PROTOCOL *RemainingDevicePath OPTIONAL
+ );
+
+/**
+ 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.Currently not implemented.
+ @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
+XenBusDxeDriverBindingStart (
+ IN EFI_DRIVER_BINDING_PROTOCOL *This,
+ IN EFI_HANDLE ControllerHandle,
+ IN EFI_DEVICE_PATH_PROTOCOL *RemainingDevicePath OPTIONAL
+ );
+
+/**
+ 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
+XenBusDxeDriverBindingStop (
+ IN EFI_DRIVER_BINDING_PROTOCOL *This,
+ IN EFI_HANDLE ControllerHandle,
+ IN UINTN NumberOfChildren,
+ IN EFI_HANDLE *ChildHandleBuffer OPTIONAL
+ );
diff --git a/OvmfPkg/XenBusDxe/XenBusDxe.c b/OvmfPkg/XenBusDxe/XenBusDxe.c
new file mode 100644
index 0000000..7f297bd
--- /dev/null
+++ b/OvmfPkg/XenBusDxe/XenBusDxe.c
@@ -0,0 +1,301 @@
+/** @file
+ This driver produces XenBus Protocol instances for each Xen PV devices.
+
+ This XenBus bus driver will first initialize differente services in order to
+ enumerate the ParaVirtualized devices available.
+
+ Those services are:
+ - HyperCall
+ - Event Channel
+ - Grant Table
+ - XenStore
+ - XenBus
+
+ Copyright (C) 2014, Citrix Ltd.
+
+ 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.
+
+**/
+
+#include <IndustryStandard/Pci.h>
+#include <IndustryStandard/Acpi.h>
+#include <Library/DebugLib.h>
+
+#include "XenBusDxe.h"
+
+
+///
+/// Driver Binding Protocol instance
+///
+EFI_DRIVER_BINDING_PROTOCOL gXenBusDxeDriverBinding = {
+ XenBusDxeDriverBindingSupported,
+ XenBusDxeDriverBindingStart,
+ XenBusDxeDriverBindingStop,
+ XENBUS_DXE_VERSION,
+ NULL,
+ NULL
+};
+
+
+/**
+ Unloads an image.
+
+ @param ImageHandle Handle that identifies the image to be
unloaded.
+
+ @retval EFI_SUCCESS The image has been unloaded.
+ @retval EFI_INVALID_PARAMETER ImageHandle is not a valid image handle.
+
+**/
+EFI_STATUS
+EFIAPI
+XenBusDxeUnload (
+ IN EFI_HANDLE ImageHandle
+ )
+{
+ EFI_STATUS Status;
+
+ EFI_HANDLE *HandleBuffer;
+ UINTN HandleCount;
+ UINTN Index;
+
+ //
+ // Retrieve array of all handles in the handle database
+ //
+ Status = gBS->LocateHandleBuffer (
+ AllHandles,
+ NULL,
+ NULL,
+ &HandleCount,
+ &HandleBuffer
+ );
+ if (EFI_ERROR (Status)) {
+ return Status;
+ }
+
+ //
+ // Disconnect the current driver from handles in the handle database
+ //
+ for (Index = 0; Index < HandleCount; Index++) {
+ gBS->DisconnectController (HandleBuffer[Index], gImageHandle, NULL);
+ }
+
+ //
+ // Free the array of handles
+ //
+ FreePool (HandleBuffer);
+
+
+ //
+ // Uninstall protocols installed in the driver entry point
+ //
+ Status = gBS->UninstallMultipleProtocolInterfaces (
+ ImageHandle,
+ &gEfiDriverBindingProtocolGuid, &gXenBusDxeDriverBinding,
+ &gEfiComponentNameProtocolGuid, &gXenBusDxeComponentName,
+ &gEfiComponentName2ProtocolGuid, &gXenBusDxeComponentName2,
+ NULL
+ );
+ if (EFI_ERROR (Status)) {
+ return Status;
+ }
+
+ return EFI_SUCCESS;
+}
+
+/**
+ This is the declaration of an EFI image entry point. This entry point is
+ the same for UEFI Applications, UEFI OS Loaders, and UEFI Drivers including
+ both device drivers and bus drivers.
+
+ @param ImageHandle The firmware allocated handle for the UEFI
image.
+ @param SystemTable A pointer to the EFI System Table.
+
+ @retval EFI_SUCCESS The operation completed successfully.
+ @retval Others An unexpected error occurred.
+**/
+EFI_STATUS
+EFIAPI
+XenBusDxeDriverEntryPoint (
+ IN EFI_HANDLE ImageHandle,
+ IN EFI_SYSTEM_TABLE *SystemTable
+ )
+{
+ EFI_STATUS Status;
+
+ //
+ // Install UEFI Driver Model protocol(s).
+ //
+ Status = EfiLibInstallDriverBindingComponentName2 (
+ ImageHandle,
+ SystemTable,
+ &gXenBusDxeDriverBinding,
+ ImageHandle,
+ &gXenBusDxeComponentName,
+ &gXenBusDxeComponentName2
+ );
+ ASSERT_EFI_ERROR (Status);
+
+
+ return Status;
+}
+
+
+/**
+ 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.
+
+ @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.
+ Currently not implemented.
+ @retval EFI_UNSUPPORTED The device specified by ControllerHandle and
+ RemainingDevicePath is not supported by the
driver specified by This.
+**/
+EFI_STATUS
+EFIAPI
+XenBusDxeDriverBindingSupported (
+ IN EFI_DRIVER_BINDING_PROTOCOL *This,
+ IN EFI_HANDLE ControllerHandle,
+ IN EFI_DEVICE_PATH_PROTOCOL *RemainingDevicePath OPTIONAL
+ )
+{
+ EFI_STATUS Status;
+ EFI_PCI_IO_PROTOCOL *PciIo;
+ PCI_TYPE00 Pci;
+
+ Status = gBS->OpenProtocol (
+ ControllerHandle,
+ &gEfiPciIoProtocolGuid,
+ (VOID **)&PciIo,
+ This->DriverBindingHandle,
+ ControllerHandle,
+ EFI_OPEN_PROTOCOL_BY_DRIVER
+ );
+ if (EFI_ERROR (Status)) {
+ return Status;
+ }
+
+ Status = PciIo->Pci.Read (PciIo, EfiPciIoWidthUint32, 0,
+ sizeof Pci / sizeof (UINT32), &Pci);
+
+ if (Status == EFI_SUCCESS) {
+ if (Pci.Hdr.VendorId == PCI_VENDOR_ID_XEN &&
+ Pci.Hdr.DeviceId == PCI_DEVICE_ID_XEN_PLATFORM) {
+ Status = EFI_SUCCESS;
+ } else {
+ Status = EFI_UNSUPPORTED;
+ }
+ }
+
+ gBS->CloseProtocol (ControllerHandle, &gEfiPciIoProtocolGuid,
+ This->DriverBindingHandle, ControllerHandle);
+
+ return Status;
+}
+
+/**
+ Starts 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.Currently not implemented.
+ @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
+XenBusDxeDriverBindingStart (
+ IN EFI_DRIVER_BINDING_PROTOCOL *This,
+ IN EFI_HANDLE ControllerHandle,
+ IN EFI_DEVICE_PATH_PROTOCOL *RemainingDevicePath OPTIONAL
+ )
+{
+ return EFI_UNSUPPORTED;
+}
+
+/**
+ Stops 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
+XenBusDxeDriverBindingStop (
+ IN EFI_DRIVER_BINDING_PROTOCOL *This,
+ IN EFI_HANDLE ControllerHandle,
+ IN UINTN NumberOfChildren,
+ IN EFI_HANDLE *ChildHandleBuffer OPTIONAL
+ )
+{
+ return EFI_UNSUPPORTED;
+}
diff --git a/OvmfPkg/XenBusDxe/XenBusDxe.h b/OvmfPkg/XenBusDxe/XenBusDxe.h
new file mode 100644
index 0000000..bcd9f3c
--- /dev/null
+++ b/OvmfPkg/XenBusDxe/XenBusDxe.h
@@ -0,0 +1,77 @@
+/** @file
+ Function declaration and internal data for XenBusDxe.
+
+ Copyright (C) 2014, Citrix Ltd.
+
+ 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.
+
+**/
+
+#ifndef __EFI_XENBUS_DXE_H__
+#define __EFI_XENBUS_DXE_H__
+
+#include <Uefi.h>
+
+//
+// Libraries
+//
+#include <Library/UefiBootServicesTableLib.h>
+#include <Library/MemoryAllocationLib.h>
+#include <Library/BaseMemoryLib.h>
+#include <Library/BaseLib.h>
+#include <Library/UefiLib.h>
+#include <Library/DevicePathLib.h>
+#include <Library/DebugLib.h>
+
+
+//
+// UEFI Driver Model Protocols
+//
+#include <Protocol/DriverBinding.h>
+
+
+//
+// Consumed Protocols
+//
+#include <Protocol/PciIo.h>
+
+
+//
+// Produced Protocols
+//
+
+
+//
+// Driver Version
+//
+#define XENBUS_DXE_VERSION 0x00000010
+
+
+//
+// Protocol instances
+//
+extern EFI_DRIVER_BINDING_PROTOCOL gXenBusDxeDriverBinding;
+extern EFI_COMPONENT_NAME2_PROTOCOL gXenBusDxeComponentName2;
+extern EFI_COMPONENT_NAME_PROTOCOL gXenBusDxeComponentName;
+
+
+//
+// Include files with function prototypes
+//
+#include "DriverBinding.h"
+#include "ComponentName.h"
+
+//
+// Other stuff
+//
+#define PCI_VENDOR_ID_XEN 0x5853
+#define PCI_DEVICE_ID_XEN_PLATFORM 0x0001
+
+
+#endif
diff --git a/OvmfPkg/XenBusDxe/XenBusDxe.inf b/OvmfPkg/XenBusDxe/XenBusDxe.inf
new file mode 100644
index 0000000..fb63ec2
--- /dev/null
+++ b/OvmfPkg/XenBusDxe/XenBusDxe.inf
@@ -0,0 +1,59 @@
+## @file
+# This driver produces a XenBus protocol for every Xen PV devices found.
+#
+# Copyright (C) 2014, Citrix Ltd.
+#
+# 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.
+#
+##
+
+[Defines]
+ INF_VERSION = 0x00010005
+ BASE_NAME = XenBusDxe
+ FILE_GUID = 565ec8ba-a484-11e3-802b-b8ac6f7d65e6
+ MODULE_TYPE = UEFI_DRIVER
+
+ VERSION_STRING = 1.0
+ ENTRY_POINT = XenBusDxeDriverEntryPoint
+ UNLOAD_IMAGE = XenBusDxeUnload
+
+
+[Packages]
+ MdePkg/MdePkg.dec
+ OvmfPkg/OvmfPkg.dec
+
+[Sources]
+ XenBusDxe.h
+ XenBusDxe.c
+ DriverBinding.h
+ ComponentName.c
+ ComponentName.h
+
+[LibraryClasses]
+ UefiDriverEntryPoint
+ UefiBootServicesTableLib
+ MemoryAllocationLib
+ BaseMemoryLib
+ BaseLib
+ UefiLib
+ DevicePathLib
+ DebugLib
+ HobLib
+
+
+[Protocols]
+ gEfiDriverBindingProtocolGuid
+ gEfiPciIoProtocolGuid
+ gEfiComponentName2ProtocolGuid
+ gEfiComponentNameProtocolGuid
+
+
+[Guids]
+ gEfiXenInfoGuid
+
--
Anthony PERARD
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