/** @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 function 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