/** @file NvmExpressDxe driver is used to manage non-volatile memory subsystem which follows NVM Express specification. (C) Copyright 2016 Hewlett Packard Enterprise Development LP
Copyright (c) 2013 - 2016, Intel Corporation. All rights reserved.
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 #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include typedef struct _NVME_CONTROLLER_PRIVATE_DATA NVME_CONTROLLER_PRIVATE_DATA; typedef struct _NVME_DEVICE_PRIVATE_DATA NVME_DEVICE_PRIVATE_DATA; #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 1 // Number of admin submission queue entries, which is 0-based #define NVME_ACQ_SIZE 1 // Number of admin completion queue entries, which is 0-based #define NVME_CSQ_SIZE 1 // Number of I/O submission queue entries, which is 0-based #define NVME_CCQ_SIZE 1 // Number of I/O completion queue entries, which is 0-based // // Number of asynchronous I/O submission queue entries, which is 0-based. // The asynchronous I/O submission queue size is 4kB in total. // #define NVME_ASYNC_CSQ_SIZE 63 // // Number of asynchronous I/O completion queue entries, which is 0-based. // The asynchronous I/O completion queue size is 4kB in total. // #define NVME_ASYNC_CCQ_SIZE 255 #define NVME_MAX_QUEUES 3 // Number of 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) // // Nvme async transfer timer interval, set by experience. // #define NVME_HC_ASYNC_TIMER EFI_TIMER_PERIOD_MILLISECONDS (1) // // 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; EFI_NVM_EXPRESS_PASS_THRU_MODE PassThruMode; EFI_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 the admin completion queue. // 3rd 4kB boundary is the start of I/O submission queue #1. // 4th 4kB boundary is the start of I/O completion queue #1. // 5th 4kB boundary is the start of I/O submission queue #2. // 6th 4kB boundary is the start of I/O completion queue #2. // UINT8 *Buffer; UINT8 *BufferPciAddr; // // Pointers to 4kB aligned submission & completion queues. // NVME_SQ *SqBuffer[NVME_MAX_QUEUES]; NVME_CQ *CqBuffer[NVME_MAX_QUEUES]; NVME_SQ *SqBufferPciAddr[NVME_MAX_QUEUES]; NVME_CQ *CqBufferPciAddr[NVME_MAX_QUEUES]; // // Submission and completion queue indices. // NVME_SQTDBL SqTdbl[NVME_MAX_QUEUES]; NVME_CQHDBL CqHdbl[NVME_MAX_QUEUES]; UINT16 AsyncSqHead; UINT8 Pt[NVME_MAX_QUEUES]; UINT16 Cid[NVME_MAX_QUEUES]; // // Nvme controller capabilities // NVME_CAP Cap; VOID *Mapping; // // For Non-blocking operations. // EFI_EVENT TimerEvent; LIST_ENTRY AsyncPassThruQueue; LIST_ENTRY UnsubmittedSubtasks; }; #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_BLOCK_IO2_PROTOCOL BlockIo2; EFI_DISK_INFO_PROTOCOL DiskInfo; EFI_STORAGE_SECURITY_COMMAND_PROTOCOL StorageSecurity; LIST_ENTRY AsyncQueue; 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_BLOCK_IO2(a) \ CR (a, \ NVME_DEVICE_PRIVATE_DATA, \ BlockIo2, \ 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 \ ) #define NVME_DEVICE_PRIVATE_DATA_FROM_STORAGE_SECURITY(a)\ CR (a, \ NVME_DEVICE_PRIVATE_DATA, \ StorageSecurity, \ NVME_DEVICE_PRIVATE_DATA_SIGNATURE \ ) // // Nvme block I/O 2 request. // #define NVME_BLKIO2_REQUEST_SIGNATURE SIGNATURE_32 ('N', 'B', '2', 'R') typedef struct { UINT32 Signature; LIST_ENTRY Link; EFI_BLOCK_IO2_TOKEN *Token; UINTN UnsubmittedSubtaskNum; BOOLEAN LastSubtaskSubmitted; // // The queue for Nvme read/write sub-tasks of a BlockIo2 request. // LIST_ENTRY SubtasksQueue; } NVME_BLKIO2_REQUEST; #define NVME_BLKIO2_REQUEST_FROM_LINK(a) \ CR (a, NVME_BLKIO2_REQUEST, Link, NVME_BLKIO2_REQUEST_SIGNATURE) #define NVME_BLKIO2_SUBTASK_SIGNATURE SIGNATURE_32 ('N', 'B', '2', 'S') typedef struct { UINT32 Signature; LIST_ENTRY Link; BOOLEAN IsLast; UINT32 NamespaceId; EFI_EVENT Event; EFI_NVM_EXPRESS_PASS_THRU_COMMAND_PACKET *CommandPacket; // // The BlockIo2 request this subtask belongs to // NVME_BLKIO2_REQUEST *BlockIo2Request; } NVME_BLKIO2_SUBTASK; #define NVME_BLKIO2_SUBTASK_FROM_LINK(a) \ CR (a, NVME_BLKIO2_SUBTASK, Link, NVME_BLKIO2_SUBTASK_SIGNATURE) // // Nvme asynchronous passthru request. // #define NVME_PASS_THRU_ASYNC_REQ_SIG SIGNATURE_32 ('N', 'P', 'A', 'R') typedef struct { UINT32 Signature; LIST_ENTRY Link; EFI_NVM_EXPRESS_PASS_THRU_COMMAND_PACKET *Packet; UINT16 CommandId; EFI_EVENT CallerEvent; } NVME_PASS_THRU_ASYNC_REQ; #define NVME_PASS_THRU_ASYNC_REQ_FROM_THIS(a) \ CR (a, \ NVME_PASS_THRU_ASYNC_REQ, \ Link, \ NVME_PASS_THRU_ASYNC_REQ_SIG \ ) /** 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 EFI_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,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 EFI_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 EFI_NVM_EXPRESS_PASS_THRU_PROTOCOL *This, IN UINT32 NamespaceId, IN OUT EFI_NVM_EXPRESS_PASS_THRU_COMMAND_PACKET *Packet, IN EFI_EVENT Event OPTIONAL ); /** Used to retrieve the next namespace ID for this NVM Express controller. The EFI_NVM_EXPRESS_PASS_THRU_PROTOCOL.GetNextNamespace() function retrieves the next valid namespace ID on this NVM Express controller. If on input the value pointed to by NamespaceId is 0xFFFFFFFF, then the first valid namespace ID defined on the NVM Express controller is returned in the location pointed to by NamespaceId and a status of EFI_SUCCESS is returned. If on input the value pointed to by NamespaceId is an invalid namespace ID other than 0xFFFFFFFF, then EFI_INVALID_PARAMETER is returned. If on input the value pointed to by NamespaceId is a valid namespace ID, then the next valid namespace ID on the NVM Express controller is returned in the location pointed to by NamespaceId, and EFI_SUCCESS is returned. If the value pointed to by NamespaceId is the namespace ID of the last namespace on the NVM Express controller, then EFI_NOT_FOUND is returned. @param[in] This A pointer to the EFI_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. @retval EFI_SUCCESS The Namespace ID of the next Namespace was returned. @retval EFI_NOT_FOUND There are no more namespaces defined on this controller. @retval EFI_INVALID_PARAMETER NamespaceId is an invalid value other than 0xFFFFFFFF. **/ EFI_STATUS EFIAPI NvmExpressGetNextNamespace ( IN EFI_NVM_EXPRESS_PASS_THRU_PROTOCOL *This, IN OUT UINT32 *NamespaceId ); /** Used to translate a device path node to a namespace ID. The EFI_NVM_EXPRESS_PASS_THRU_PROTOCOL.GetNamespace() function determines the namespace ID associated with the 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. If this translation is successful, then that namespace ID is returned in NamespaceId, and EFI_SUCCESS is returned @param[in] This A pointer to the EFI_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. @retval EFI_SUCCESS DevicePath was successfully translated to NamespaceId. @retval EFI_INVALID_PARAMETER If DevicePath or NamespaceId 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 namespace ID, then EFI_NOT_FOUND is returned. **/ EFI_STATUS EFIAPI NvmExpressGetNamespace ( IN EFI_NVM_EXPRESS_PASS_THRU_PROTOCOL *This, IN EFI_DEVICE_PATH_PROTOCOL *DevicePath, OUT UINT32 *NamespaceId ); /** Used to allocate and build a device path node for an NVM Express namespace on an NVM Express controller. The EFI_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 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 EFI_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,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 NamespaceId is not valid. @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 EFI_NVM_EXPRESS_PASS_THRU_PROTOCOL *This, IN UINT32 NamespaceId, IN OUT EFI_DEVICE_PATH_PROTOCOL **DevicePath ); /** Dump the execution status from a given completion queue entry. @param[in] Cq A pointer to the NVME_CQ item. **/ VOID NvmeDumpStatus ( IN NVME_CQ *Cq ); #endif