diff options
Diffstat (limited to 'MdeModulePkg/Bus/Pci/NvmExpressDxe/NvmExpress.h')
| -rw-r--r-- | MdeModulePkg/Bus/Pci/NvmExpressDxe/NvmExpress.h | 614 |
1 files changed, 614 insertions, 0 deletions
diff --git a/MdeModulePkg/Bus/Pci/NvmExpressDxe/NvmExpress.h b/MdeModulePkg/Bus/Pci/NvmExpressDxe/NvmExpress.h new file mode 100644 index 0000000000..d39b62e102 --- /dev/null +++ b/MdeModulePkg/Bus/Pci/NvmExpressDxe/NvmExpress.h @@ -0,0 +1,614 @@ +/** @file
+ NvmExpressDxe driver is used to manage non-volatile memory subsystem which follows
+ NVM Express specification.
+
+ Copyright (c) 2013, 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.
+
+**/
+
+#ifndef _EFI_NVM_EXPRESS_H_
+#define _EFI_NVM_EXPRESS_H_
+
+#include <Uefi.h>
+
+#include <IndustryStandard/Pci.h>
+
+#include <Protocol/ComponentName.h>
+#include <Protocol/ComponentName2.h>
+#include <Protocol/DriverBinding.h>
+#include <Protocol/LoadedImage.h>
+#include <Protocol/DevicePath.h>
+#include <Protocol/PciIo.h>
+#include <Protocol/BlockIo.h>
+#include <Protocol/DiskInfo.h>
+#include <Protocol/DriverSupportedEfiVersion.h>
+
+#include <Library/BaseLib.h>
+#include <Library/BaseMemoryLib.h>
+#include <Library/DebugLib.h>
+#include <Library/PrintLib.h>
+#include <Library/UefiLib.h>
+#include <Library/DevicePathLib.h>
+#include <Library/MemoryAllocationLib.h>
+#include <Library/UefiBootServicesTableLib.h>
+#include <Library/UefiDriverEntryPoint.h>
+
+typedef struct _NVME_CONTROLLER_PRIVATE_DATA NVME_CONTROLLER_PRIVATE_DATA;
+typedef struct _NVME_DEVICE_PRIVATE_DATA NVME_DEVICE_PRIVATE_DATA;
+
+#include "NvmExpressPassthru.h"
+#include "NvmExpressBlockIo.h"
+#include "NvmExpressDiskInfo.h"
+#include "NvmExpressHci.h"
+
+extern EFI_DRIVER_BINDING_PROTOCOL gNvmExpressDriverBinding;
+extern EFI_COMPONENT_NAME_PROTOCOL gNvmExpressComponentName;
+extern EFI_COMPONENT_NAME2_PROTOCOL gNvmExpressComponentName2;
+extern EFI_DRIVER_SUPPORTED_EFI_VERSION_PROTOCOL gNvmExpressDriverSupportedEfiVersion;
+
+#define PCI_CLASS_MASS_STORAGE_NVM 0x08 // mass storage sub-class non-volatile memory.
+#define PCI_IF_NVMHCI 0x02 // mass storage programming interface NVMHCI.
+
+#define NVME_ASQ_SIZE 2 // Number of admin submission queue entries
+#define NVME_ACQ_SIZE 2 // Number of admin completion queue entries
+
+#define NVME_CSQ_SIZE 2 // Number of I/O submission queue entries
+#define NVME_CCQ_SIZE 2 // Number of I/O completion queue entries
+
+#define NVME_MAX_IO_QUEUES 2 // Number of I/O queues supported by the driver
+
+#define NVME_CONTROLLER_ID 0
+
+//
+// Time out value for Nvme transaction execution
+//
+#define NVME_GENERIC_TIMEOUT EFI_TIMER_PERIOD_SECONDS (5)
+
+//
+// Unique signature for private data structure.
+//
+#define NVME_CONTROLLER_PRIVATE_DATA_SIGNATURE SIGNATURE_32 ('N','V','M','E')
+
+//
+// Nvme private data structure.
+//
+struct _NVME_CONTROLLER_PRIVATE_DATA {
+ UINT32 Signature;
+
+ EFI_HANDLE ControllerHandle;
+ EFI_HANDLE ImageHandle;
+ EFI_HANDLE DriverBindingHandle;
+
+ EFI_PCI_IO_PROTOCOL *PciIo;
+ UINT64 PciAttributes;
+
+ EFI_DEVICE_PATH_PROTOCOL *ParentDevicePath;
+
+ NVM_EXPRESS_PASS_THRU_MODE PassThruMode;
+ NVM_EXPRESS_PASS_THRU_PROTOCOL Passthru;
+
+ //
+ // pointer to identify controller data
+ //
+ NVME_ADMIN_CONTROLLER_DATA *ControllerData;
+
+ //
+ // 6 x 4kB aligned buffers will be carved out of this buffer.
+ // 1st 4kB boundary is the start of the admin submission queue.
+ // 2nd 4kB boundary is the start of submission queue #1.
+ // 3rd 4kB boundary is the start of the admin completion queue.
+ // 4th 4kB boundary is the start of completion queue #1.
+ // 5th 4kB boundary is the start of the first PRP list page.
+ // 6th 4kB boundary is the start of the second PRP list page.
+ //
+ UINT8 *Buffer;
+ UINT8 *BufferPciAddr;
+
+ //
+ // Pointers to 4kB aligned submission & completion queues.
+ //
+ NVME_SQ *SqBuffer[NVME_MAX_IO_QUEUES];
+ NVME_CQ *CqBuffer[NVME_MAX_IO_QUEUES];
+ NVME_SQ *SqBufferPciAddr[NVME_MAX_IO_QUEUES];
+ NVME_CQ *CqBufferPciAddr[NVME_MAX_IO_QUEUES];
+
+ //
+ // Submission and completion queue indices.
+ //
+ NVME_SQTDBL SqTdbl[NVME_MAX_IO_QUEUES];
+ NVME_CQHDBL CqHdbl[NVME_MAX_IO_QUEUES];
+
+ UINT8 Pt[2];
+ UINT16 Cid[2];
+
+ //
+ // Nvme controller capabilities
+ //
+ NVME_CAP Cap;
+
+ VOID *Mapping;
+};
+
+#define NVME_CONTROLLER_PRIVATE_DATA_FROM_PASS_THRU(a) \
+ CR (a, \
+ NVME_CONTROLLER_PRIVATE_DATA, \
+ Passthru, \
+ NVME_CONTROLLER_PRIVATE_DATA_SIGNATURE \
+ )
+
+//
+// Unique signature for private data structure.
+//
+#define NVME_DEVICE_PRIVATE_DATA_SIGNATURE SIGNATURE_32 ('X','S','S','D')
+
+//
+// Nvme device private data structure
+//
+struct _NVME_DEVICE_PRIVATE_DATA {
+ UINT32 Signature;
+
+ EFI_HANDLE DeviceHandle;
+ EFI_HANDLE ControllerHandle;
+ EFI_HANDLE DriverBindingHandle;
+
+ EFI_DEVICE_PATH_PROTOCOL *DevicePath;
+
+ EFI_UNICODE_STRING_TABLE *ControllerNameTable;
+
+ UINT32 NamespaceId;
+ UINT64 NamespaceUuid;
+
+ EFI_BLOCK_IO_MEDIA Media;
+ EFI_BLOCK_IO_PROTOCOL BlockIo;
+ EFI_DISK_INFO_PROTOCOL DiskInfo;
+
+ EFI_LBA NumBlocks;
+
+ CHAR16 ModelName[80];
+ NVME_ADMIN_NAMESPACE_DATA NamespaceData;
+
+ NVME_CONTROLLER_PRIVATE_DATA *Controller;
+
+};
+
+//
+// Statments to retrieve the private data from produced protocols.
+//
+#define NVME_DEVICE_PRIVATE_DATA_FROM_BLOCK_IO(a) \
+ CR (a, \
+ NVME_DEVICE_PRIVATE_DATA, \
+ BlockIo, \
+ NVME_DEVICE_PRIVATE_DATA_SIGNATURE \
+ )
+
+#define NVME_DEVICE_PRIVATE_DATA_FROM_DISK_INFO(a) \
+ CR (a, \
+ NVME_DEVICE_PRIVATE_DATA, \
+ DiskInfo, \
+ NVME_DEVICE_PRIVATE_DATA_SIGNATURE \
+ )
+
+/**
+ Retrieves a Unicode string that is the user readable name of the driver.
+
+ This function retrieves the user readable name of a driver in the form of a
+ Unicode string. If the driver specified by This has a user readable name in
+ the language specified by Language, then a pointer to the driver name is
+ returned in DriverName, and EFI_SUCCESS is returned. If the driver specified
+ by This does not support the language specified by Language,
+ then EFI_UNSUPPORTED is returned.
+
+ @param This[in] A pointer to the EFI_COMPONENT_NAME2_PROTOCOL or
+ EFI_COMPONENT_NAME_PROTOCOL instance.
+
+ @param Language[in] A pointer to a Null-terminated ASCII string
+ array indicating the language. This is the
+ language of the driver 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. Language is specified
+ in RFC 4646 or ISO 639-2 language code format.
+
+ @param DriverName[out] 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
+NvmExpressComponentNameGetDriverName (
+ IN EFI_COMPONENT_NAME_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 a driver.
+
+ This function retrieves the user readable name of the controller specified by
+ ControllerHandle and ChildHandle in the form of a Unicode string. If the
+ driver specified by This has a user readable name in the language specified by
+ Language, then a pointer to the controller name is returned in ControllerName,
+ and EFI_SUCCESS is returned. If the driver specified by This is not currently
+ managing the controller specified by ControllerHandle and ChildHandle,
+ then EFI_UNSUPPORTED is returned. If the driver specified by This does not
+ support the language specified by Language, then EFI_UNSUPPORTED is returned.
+
+ @param This[in] A pointer to the EFI_COMPONENT_NAME2_PROTOCOL or
+ EFI_COMPONENT_NAME_PROTOCOL instance.
+
+ @param ControllerHandle[in] 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[in] 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[in] A pointer to a Null-terminated ASCII string
+ array indicating the language. This is the
+ language of the driver 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. Language is specified in
+ RFC 4646 or ISO 639-2 language code format.
+
+ @param ControllerName[out] 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
+NvmExpressComponentNameGetControllerName (
+ IN EFI_COMPONENT_NAME_PROTOCOL *This,
+ IN EFI_HANDLE ControllerHandle,
+ IN EFI_HANDLE ChildHandle OPTIONAL,
+ IN CHAR8 *Language,
+ OUT CHAR16 **ControllerName
+ );
+
+/**
+ 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.
+
+ This function checks to see if the driver specified by This supports the device specified by
+ ControllerHandle. Drivers will typically use the device path attached to
+ ControllerHandle and/or the services from the bus I/O abstraction attached to
+ ControllerHandle to determine if the driver supports ControllerHandle. This function
+ may be called many times during platform initialization. In order to reduce boot times, the tests
+ performed by this function must be very small, and take as little time as possible to execute. This
+ function must not change the state of any hardware devices, and this function must be aware that the
+ device specified by ControllerHandle may already be managed by the same driver or a
+ different driver. This function must match its calls to AllocatePages() with FreePages(),
+ AllocatePool() with FreePool(), and OpenProtocol() with CloseProtocol().
+ Since ControllerHandle may have been previously started by the same driver, if a protocol is
+ already in the opened state, then it must not be closed with CloseProtocol(). This is required
+ to guarantee the state of ControllerHandle is not modified by this function.
+
+ @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
+NvmExpressDriverBindingSupported (
+ IN EFI_DRIVER_BINDING_PROTOCOL *This,
+ IN EFI_HANDLE Controller,
+ IN EFI_DEVICE_PATH_PROTOCOL *RemainingDevicePath
+ );
+
+/**
+ 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
+NvmExpressDriverBindingStart (
+ IN EFI_DRIVER_BINDING_PROTOCOL *This,
+ IN EFI_HANDLE Controller,
+ IN EFI_DEVICE_PATH_PROTOCOL *RemainingDevicePath
+ );
+
+/**
+ 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
+NvmExpressDriverBindingStop (
+ IN EFI_DRIVER_BINDING_PROTOCOL *This,
+ IN EFI_HANDLE Controller,
+ IN UINTN NumberOfChildren,
+ IN EFI_HANDLE *ChildHandleBuffer
+ );
+
+/**
+ Sends an NVM Express Command Packet to an NVM Express controller or namespace. This function supports
+ both blocking I/O and nonblocking I/O. The blocking I/O functionality is required, and the nonblocking
+ I/O functionality is optional.
+
+ @param[in] This A pointer to the NVM_EXPRESS_PASS_THRU_PROTOCOL instance.
+ @param[in] NamespaceId Is a 32 bit Namespace ID to which the Express HCI command packet will be sent.
+ A value of 0 denotes the NVM Express controller, a value of all 0FFh in the namespace
+ ID specifies that the command packet should be sent to all valid namespaces.
+ @param[in] NamespaceUuid Is a 64 bit Namespace UUID to which the Express HCI command packet will be sent.
+ A value of 0 denotes the NVM Express controller, a value of all 0FFh in the namespace
+ UUID specifies that the command packet should be sent to all valid namespaces.
+ @param[in,out] Packet A pointer to the NVM Express HCI Command Packet to send to the NVMe namespace specified
+ by NamespaceId.
+ @param[in] Event If nonblocking I/O is not supported then Event is ignored, and blocking I/O is performed.
+ If Event is NULL, then blocking I/O is performed. If Event is not NULL and non blocking I/O
+ is supported, then nonblocking I/O is performed, and Event will be signaled when the NVM
+ Express Command Packet completes.
+
+ @retval EFI_SUCCESS The NVM Express Command Packet was sent by the host. TransferLength bytes were transferred
+ to, or from DataBuffer.
+ @retval EFI_BAD_BUFFER_SIZE The NVM Express Command Packet was not executed. The number of bytes that could be transferred
+ is returned in TransferLength.
+ @retval EFI_NOT_READY The NVM Express Command Packet could not be sent because the controller is not ready. The caller
+ may retry again later.
+ @retval EFI_DEVICE_ERROR A device error occurred while attempting to send the NVM Express Command Packet.
+ @retval EFI_INVALID_PARAMETER Namespace, or the contents of NVM_EXPRESS_PASS_THRU_COMMAND_PACKET are invalid. The NVM
+ Express Command Packet was not sent, so no additional status information is available.
+ @retval EFI_UNSUPPORTED The command described by the NVM Express Command Packet is not supported by the host adapter.
+ The NVM Express Command Packet was not sent, so no additional status information is available.
+ @retval EFI_TIMEOUT A timeout occurred while waiting for the NVM Express Command Packet to execute.
+
+**/
+EFI_STATUS
+EFIAPI
+NvmExpressPassThru (
+ IN NVM_EXPRESS_PASS_THRU_PROTOCOL *This,
+ IN UINT32 NamespaceId,
+ IN UINT64 NamespaceUuid,
+ IN OUT NVM_EXPRESS_PASS_THRU_COMMAND_PACKET *Packet,
+ IN EFI_EVENT Event OPTIONAL
+ );
+
+/**
+ Used to retrieve the list of namespaces defined on an NVM Express controller.
+
+ The NVM_EXPRESS_PASS_THRU_PROTOCOL.GetNextNamespace() function retrieves a list of namespaces
+ defined on an NVM Express controller. If on input a NamespaceID is specified by all 0xFF in the
+ namespace buffer, then the first namespace defined on the NVM Express controller is returned in
+ NamespaceID, and a status of EFI_SUCCESS is returned.
+
+ If NamespaceId is a Namespace value that was returned on a previous call to GetNextNamespace(),
+ then the next valid NamespaceId for an NVM Express SSD namespace on the NVM Express controller
+ is returned in NamespaceId, and EFI_SUCCESS is returned.
+
+ If Namespace array is not a 0xFFFFFFFF and NamespaceId was not returned on a previous call to
+ GetNextNamespace(), then EFI_INVALID_PARAMETER is returned.
+
+ If NamespaceId is the NamespaceId of the last SSD namespace on the NVM Express controller, then
+ EFI_NOT_FOUND is returned
+
+ @param[in] This A pointer to the NVM_EXPRESS_PASS_THRU_PROTOCOL instance.
+ @param[in,out] NamespaceId On input, a pointer to a legal NamespaceId for an NVM Express
+ namespace present on the NVM Express controller. On output, a
+ pointer to the next NamespaceId of an NVM Express namespace on
+ an NVM Express controller. An input value of 0xFFFFFFFF retrieves
+ the first NamespaceId for an NVM Express namespace present on an
+ NVM Express controller.
+ @param[out] NamespaceUuid On output, the UUID associated with the next namespace, if a UUID
+ is defined for that NamespaceId, otherwise, zero is returned in
+ this parameter. If the caller does not require a UUID, then a NULL
+ pointer may be passed.
+
+ @retval EFI_SUCCESS The NamespaceId of the next Namespace was returned.
+ @retval EFI_NOT_FOUND There are no more namespaces defined on this controller.
+ @retval EFI_INVALID_PARAMETER Namespace array is not a 0xFFFFFFFF and NamespaceId was not returned
+ on a previous call to GetNextNamespace().
+
+**/
+EFI_STATUS
+EFIAPI
+NvmExpressGetNextNamespace (
+ IN NVM_EXPRESS_PASS_THRU_PROTOCOL *This,
+ IN OUT UINT32 *NamespaceId,
+ OUT UINT64 *NamespaceUuid OPTIONAL
+ );
+
+/**
+ Used to translate a device path node to a Target ID and LUN.
+
+ The NVM_EXPRESS_PASS_THRU_PROTOCOL.GetNamwspace() function determines the Namespace ID and Namespace UUID
+ associated with the NVM Express SSD namespace described by DevicePath. If DevicePath is a device path node type
+ that the NVM Express Pass Thru driver supports, then the NVM Express Pass Thru driver will attempt to translate
+ the contents DevicePath into a Namespace ID and UUID. If this translation is successful, then that Namespace ID
+ and UUID are returned in NamespaceID and NamespaceUUID, and EFI_SUCCESS is returned.
+
+ @param[in] This A pointer to the NVM_EXPRESS_PASS_THRU_PROTOCOL instance.
+ @param[in] DevicePath A pointer to the device path node that describes an NVM Express namespace on
+ the NVM Express controller.
+ @param[out] NamespaceId The NVM Express namespace ID contained in the device path node.
+ @param[out] NamespaceUuid The NVM Express namespace contained in the device path node.
+
+ @retval EFI_SUCCESS DevicePath was successfully translated to NamespaceId and NamespaceUuid.
+ @retval EFI_INVALID_PARAMETER If DevicePath, NamespaceId, or NamespaceUuid are NULL, then EFI_INVALID_PARAMETER
+ is returned.
+ @retval EFI_UNSUPPORTED If DevicePath is not a device path node type that the NVM Express Pass Thru driver
+ supports, then EFI_UNSUPPORTED is returned.
+ @retval EFI_NOT_FOUND If DevicePath is a device path node type that the Nvm Express Pass Thru driver
+ supports, but there is not a valid translation from DevicePath to a NamespaceID
+ and NamespaceUuid, then EFI_NOT_FOUND is returned.
+**/
+EFI_STATUS
+EFIAPI
+NvmExpressGetNamespace (
+ IN NVM_EXPRESS_PASS_THRU_PROTOCOL *This,
+ IN EFI_DEVICE_PATH_PROTOCOL *DevicePath,
+ OUT UINT32 *NamespaceId,
+ OUT UINT64 *NamespaceUuid
+ );
+
+/**
+ Used to allocate and build a device path node for an NVM Express namespace on an NVM Express controller.
+
+ The NVM_EXPRESS_PASS_THRU_PROTOCOL.BuildDevicePath() function allocates and builds a single device
+ path node for the NVM Express namespace specified by NamespaceId.
+
+ If the namespace device specified by NamespaceId is not valid , then EFI_NOT_FOUND is returned.
+
+ If DevicePath is NULL, then EFI_INVALID_PARAMETER is returned.
+
+ If there are not enough resources to allocate the device path node, then EFI_OUT_OF_RESOURCES is returned.
+
+ Otherwise, DevicePath is allocated with the boot service AllocatePool(), the contents of DevicePath are
+ initialized to describe the NVM Express namespace specified by NamespaceId, and EFI_SUCCESS is returned.
+
+ @param[in] This A pointer to the NVM_EXPRESS_PASS_THRU_PROTOCOL instance.
+ @param[in] NamespaceId The NVM Express namespace ID for which a device path node is to be
+ allocated and built. Caller must set the NamespaceId to zero if the
+ device path node will contain a valid UUID.
+ @param[in] NamespaceUuid The NVM Express namespace UUID for which a device path node is to be
+ allocated and built. UUID will only be valid of the Namespace ID is zero.
+ @param[in,out] DevicePath A pointer to a single device path node that describes the NVM Express
+ namespace specified by NamespaceId. This function is responsible for
+ allocating the buffer DevicePath with the boot service AllocatePool().
+ It is the caller's responsibility to free DevicePath when the caller
+ is finished with DevicePath.
+ @retval EFI_SUCCESS The device path node that describes the NVM Express namespace specified
+ by NamespaceId was allocated and returned in DevicePath.
+ @retval EFI_NOT_FOUND The NVM Express namespace specified by NamespaceId does not exist on the
+ NVM Express controller.
+ @retval EFI_INVALID_PARAMETER DevicePath is NULL.
+ @retval EFI_OUT_OF_RESOURCES There are not enough resources to allocate the DevicePath node.
+
+**/
+EFI_STATUS
+EFIAPI
+NvmExpressBuildDevicePath (
+ IN NVM_EXPRESS_PASS_THRU_PROTOCOL *This,
+ IN UINT32 NamespaceId,
+ IN UINT64 NamespaceUuid,
+ IN OUT EFI_DEVICE_PATH_PROTOCOL **DevicePath
+ );
+
+#endif
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