+/** @file
+ This protocol provides services that allow NVM Express commands to be sent to an
+ NVM Express controller or to a specific namespace in a NVM Express controller.
+ This protocol interface is optimized for storage.
+
+ Copyright (c) 2013 - 2015, 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 _UEFI_NVM_EXPRESS_PASS_THRU_H_
+#define _UEFI_NVM_EXPRESS_PASS_THRU_H_
+
+#define EFI_NVM_EXPRESS_PASS_THRU_PROTOCOL_GUID \
+ { \
+ 0x52c78312, 0x8edc, 0x4233, { 0x98, 0xf2, 0x1a, 0x1a, 0xa5, 0xe3, 0x88, 0xa5 } \
+ }
+
+typedef struct _EFI_NVM_EXPRESS_PASS_THRU_PROTOCOL EFI_NVM_EXPRESS_PASS_THRU_PROTOCOL;
+
+typedef struct {
+ UINT32 Attributes;
+ UINT32 IoAlign;
+ UINT32 NvmeVersion;
+} EFI_NVM_EXPRESS_PASS_THRU_MODE;
+
+//
+// If this bit is set, then the EFI_NVM_EXPRESS_PASS_THRU_PROTOCOL interface is
+// for directly addressable namespaces.
+//
+#define EFI_NVM_EXPRESS_PASS_THRU_ATTRIBUTES_PHYSICAL 0x0001
+//
+// If this bit is set, then the EFI_NVM_EXPRESS_PASS_THRU_PROTOCOL interface is
+// for a single volume logical namespace comprised of multiple namespaces.
+//
+#define EFI_NVM_EXPRESS_PASS_THRU_ATTRIBUTES_LOGICAL 0x0002
+//
+// If this bit is set, then the EFI_NVM_EXPRESS_PASS_THRU_PROTOCOL interface
+// supports non-blocking I/O.
+//
+#define EFI_NVM_EXPRESS_PASS_THRU_ATTRIBUTES_NONBLOCKIO 0x0004
+//
+// If this bit is set, then the EFI_NVM_EXPRESS_PASS_THRU_PROTOCOL interface
+// supports NVM command set.
+//
+#define EFI_NVM_EXPRESS_PASS_THRU_ATTRIBUTES_CMD_SET_NVM 0x0008
+
+//
+// FusedOperation
+//
+#define NORMAL_CMD 0x00
+#define FUSED_FIRST_CMD 0x01
+#define FUSED_SECOND_CMD 0x02
+
+typedef struct {
+ UINT32 Opcode:8;
+ UINT32 FusedOperation:2;
+ UINT32 Reserved:22;
+} NVME_CDW0;
+
+//
+// Flags
+//
+#define CDW2_VALID 0x01
+#define CDW3_VALID 0x02
+#define CDW10_VALID 0x04
+#define CDW11_VALID 0x08
+#define CDW12_VALID 0x10
+#define CDW13_VALID 0x20
+#define CDW14_VALID 0x40
+#define CDW15_VALID 0x80
+
+//
+// Queue Type
+//
+#define NVME_ADMIN_QUEUE 0x00
+#define NVME_IO_QUEUE 0x01
+
+typedef struct {
+ NVME_CDW0 Cdw0;
+ UINT8 Flags;
+ UINT32 Nsid;
+ UINT32 Cdw2;
+ UINT32 Cdw3;
+ UINT32 Cdw10;
+ UINT32 Cdw11;
+ UINT32 Cdw12;
+ UINT32 Cdw13;
+ UINT32 Cdw14;
+ UINT32 Cdw15;
+} EFI_NVM_EXPRESS_COMMAND;
+
+typedef struct {
+ UINT32 DW0;
+ UINT32 DW1;
+ UINT32 DW2;
+ UINT32 DW3;
+} EFI_NVM_EXPRESS_COMPLETION;
+
+typedef struct {
+ UINT64 CommandTimeout;
+ VOID *TransferBuffer;
+ UINT32 TransferLength;
+ VOID *MetadataBuffer;
+ UINT32 MetadataLength;
+ UINT8 QueueType;
+ EFI_NVM_EXPRESS_COMMAND *NvmeCmd;
+ EFI_NVM_EXPRESS_COMPLETION *NvmeCompletion;
+} EFI_NVM_EXPRESS_PASS_THRU_COMMAND_PACKET;
+
+//
+// Protocol funtion prototypes
+//
+/**
+ Sends an NVM Express Command Packet to an NVM Express controller or namespace. This function supports
+ both blocking I/O and non-blocking I/O. The blocking I/O functionality is required, and the non-blocking
+ I/O functionality is optional.
+
+
+ @param[in] This A pointer to the EFI_NVM_EXPRESS_PASS_THRU_PROTOCOL instance.
+ @param[in] NamespaceId A 32 bit namespace ID as defined in the NVMe specification to which the NVM Express Command
+ Packet will be sent. A value of 0 denotes the NVM Express controller, a value of all 0xFF's
+ (all bytes are 0xFF) 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 Command Packet.
+ @param[in] Event If non-blocking 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 non-blocking 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 NamespaceId 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 NVM Express
+ controller. 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.
+
+**/
+typedef
+EFI_STATUS
+(EFIAPI *EFI_NVM_EXPRESS_PASS_THRU_PASSTHRU)(
+ 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.
+
+**/
+typedef
+EFI_STATUS
+(EFIAPI *EFI_NVM_EXPRESS_PASS_THRU_GET_NEXT_NAMESPACE)(
+ IN EFI_NVM_EXPRESS_PASS_THRU_PROTOCOL *This,
+ IN 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.
+
+**/
+typedef
+EFI_STATUS
+(EFIAPI *EFI_NVM_EXPRESS_PASS_THRU_BUILD_DEVICE_PATH)(
+ IN EFI_NVM_EXPRESS_PASS_THRU_PROTOCOL *This,
+ IN UINT32 NamespaceId,
+ IN OUT EFI_DEVICE_PATH_PROTOCOL **DevicePath
+ );
+
+/**
+ 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.
+**/
+typedef
+EFI_STATUS
+(EFIAPI *EFI_NVM_EXPRESS_PASS_THRU_GET_NAMESPACE)(
+ IN EFI_NVM_EXPRESS_PASS_THRU_PROTOCOL *This,
+ IN EFI_DEVICE_PATH_PROTOCOL *DevicePath,
+ OUT UINT32 *NamespaceId
+ );
+
+//
+// Protocol Interface Structure
+//
+struct _EFI_NVM_EXPRESS_PASS_THRU_PROTOCOL {
+ EFI_NVM_EXPRESS_PASS_THRU_MODE *Mode;
+ EFI_NVM_EXPRESS_PASS_THRU_PASSTHRU PassThru;
+ EFI_NVM_EXPRESS_PASS_THRU_GET_NEXT_NAMESPACE GetNextNamespace;
+ EFI_NVM_EXPRESS_PASS_THRU_BUILD_DEVICE_PATH BuildDevicePath;
+ EFI_NVM_EXPRESS_PASS_THRU_GET_NAMESPACE GetNamespace;
+};
+
+extern EFI_GUID gEfiNvmExpressPassThruProtocolGuid;
+
+#endif
+
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