/**
Used to retrieve the list of legal Target IDs and LUNs for SCSI devices on a SCSI channel. These
can either be the list SCSI devices that are actually present on the SCSI channel, or the list of legal
Target Ids and LUNs for the SCSI channel. Regardless, the caller of this function must probe the
Target ID and LUN returned to see if a SCSI device is actually present at that location on the SCSI
channel.
@param[in] This A pointer to the EFI_EXT_SCSI_PASS_THRU_PROTOCOL instance.
@param[in, out] Target On input, a pointer to the Target ID (an array of size
TARGET_MAX_BYTES) of a SCSI device present on the SCSI channel.
On output, a pointer to the Target ID (an array of
TARGET_MAX_BYTES) of the next SCSI device present on a SCSI
channel. An input value of 0xF(all bytes in the array are 0xF) in the
Target array retrieves the Target ID of the first SCSI device present on a
SCSI channel.
@param[in, out] Lun On input, a pointer to the LUN of a SCSI device present on the SCSI
channel. On output, a pointer to the LUN of the next SCSI device present
on a SCSI channel.
@retval EFI_SUCCESS The Target ID and LUN of the next SCSI device on the SCSI
channel was returned in Target and Lun.
@retval EFI_INVALID_PARAMETER Target array is not all 0xF, and Target and Lun were
not returned on a previous call to GetNextTargetLun().
@retval EFI_NOT_FOUND There are no more SCSI devices on this SCSI channel.
**/
EFI_STATUS
EFIAPI
IScsiExtScsiPassThruGetNextTargetLun (
IN EFI_EXT_SCSI_PASS_THRU_PROTOCOL *This,
IN OUT UINT8 **Target,
IN OUT UINT64 *Lun
)
{
ISCSI_DRIVER_DATA *Private;
ISCSI_SESSION_CONFIG_NVDATA *ConfigNvData;
UINT8 TargetId[TARGET_MAX_BYTES];
Private = ISCSI_DRIVER_DATA_FROM_EXT_SCSI_PASS_THRU (This);
ConfigNvData = &Private->Session.ConfigData.NvData;
if ((*Target)[0] == 0 && (CompareMem (Lun, ConfigNvData->BootLun, sizeof (UINT64)) == 0)) {
//
// Only one <Target, Lun> pair per iSCSI Driver instance.
//
return EFI_NOT_FOUND;
}
SetMem (TargetId, TARGET_MAX_BYTES, 0xFF);
if (CompareMem (*Target, TargetId, TARGET_MAX_BYTES) == 0) {
(*Target)[0] = 0;
CopyMem (Lun, ConfigNvData->BootLun, sizeof (UINT64));
return EFI_SUCCESS;
}
return EFI_INVALID_PARAMETER;
}
/**
Sends a SCSI Request Packet to a SCSI device that is attached to the SCSI channel. 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_EXT_SCSI_PASS_THRU_PROTOCOL instance.
@param[in] Target The Target is an array of size TARGET_MAX_BYTES and it represents
the id of the SCSI device to send the SCSI Request Packet. Each
transport driver may chose to utilize a subset of this size to suit the needs
of transport target representation. For example, a Fibre Channel driver
may use only 8 bytes (WWN) to represent an FC target.
@param[in] Lun The LUN of the SCSI device to send the SCSI Request Packet.
@param[in, out] Packet A pointer to the SCSI Request Packet to send to the SCSI device
specified by Target and Lun.
@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
SCSI Request Packet completes.
@retval EFI_SUCCESS The SCSI Request Packet was sent by the host. For bi-directional
commands, InTransferLength bytes were transferred from
InDataBuffer. For write and bi-directional commands,
OutTransferLength bytes were transferred by
OutDataBuffer.
@retval EFI_BAD_BUFFER_SIZE The SCSI Request Packet was not executed. The number of bytes that
could be transferred is returned in InTransferLength. For write
and bi-directional commands, OutTransferLength bytes were
transferred by OutDataBuffer. Currently not implemeted.
@retval EFI_NOT_READY The SCSI Request Packet could not be sent because there are too many
SCSI Request Packets already queued. The caller may retry again later.
@retval EFI_DEVICE_ERROR A device error occurred while attempting to send the SCSI Request
Packet.
@retval EFI_INVALID_PARAMETER Target, Lun, or the contents of ScsiRequestPacket are invalid.
@retval EFI_UNSUPPORTED The command described by the SCSI Request Packet is not supported
by the host adapter. This includes the case of Bi-directional SCSI
commands not supported by the implementation. The SCSI Request
Packet was not sent, so no additional status information is available.
Currently not implemeted.
@retval EFI_TIMEOUT A timeout occurred while waiting for the SCSI Request Packet to execute.
**/
EFI_STATUS
EFIAPI
IScsiExtScsiPassThruFunction (
IN EFI_EXT_SCSI_PASS_THRU_PROTOCOL *This,
IN UINT8 *Target,
IN UINT64 Lun,
IN OUT EFI_EXT_SCSI_PASS_THRU_SCSI_REQUEST_PACKET *Packet,
IN EFI_EVENT Event OPTIONAL
)
{
ISCSI_DRIVER_DATA *Private;
ISCSI_SESSION_CONFIG_NVDATA *ConfigNvData;
EFI_STATUS Status;
Private = ISCSI_DRIVER_DATA_FROM_EXT_SCSI_PASS_THRU (This);
ConfigNvData = &Private->Session.ConfigData.NvData;
if (Target[0] != 0 || (CompareMem (&Lun, ConfigNvData->BootLun, sizeof (UINT64)) != 0)) {
return EFI_INVALID_PARAMETER;
}
if ((Packet == NULL) || (Packet->Cdb == NULL)) {
return EFI_INVALID_PARAMETER;
}
Status = IScsiExecuteScsiCommand (This, Target, Lun, Packet);
if ((Status != EFI_SUCCESS) && (Status != EFI_NOT_READY)) {
//
// Try to reinstate the session and re-execute the Scsi command.
//
if (EFI_ERROR (IScsiSessionReinstatement (Private))) {
return EFI_DEVICE_ERROR;
}
Status = IScsiExecuteScsiCommand (This, Target, Lun, Packet);
}
return Status;
}
/**
Used to translate a device path node to a Target ID and LUN.
@param[in] This A pointer to the EFI_EXT_SCSI_PASS_THRU_PROTOCOL instance.
@param[in] DevicePath A pointer to a single device path node that describes the SCSI device
on the SCSI channel.
@param[out] Target A pointer to the Target Array which represents the ID of a SCSI device
on the SCSI channel.
@param[out] Lun A pointer to the LUN of a SCSI device on the SCSI channel.
@retval EFI_SUCCESS DevicePath was successfully translated to a Target ID and
LUN, and they were returned in Target and Lun.
@retval EFI_INVALID_PARAMETER DevicePath or Target or Lun is NULL.
@retval EFI_NOT_FOUND A valid translation from DevicePath to a Target ID and LUN
does not exist.Currently not implemented.
@retval EFI_UNSUPPORTED This driver does not support the device path node type in
DevicePath.
**/
EFI_STATUS
EFIAPI
IScsiExtScsiPassThruGetTargetLun (
IN EFI_EXT_SCSI_PASS_THRU_PROTOCOL *This,
IN EFI_DEVICE_PATH_PROTOCOL *DevicePath,
OUT UINT8 **Target,
OUT UINT64 *Lun
)
{
ISCSI_DRIVER_DATA *Private;
ISCSI_SESSION_CONFIG_NVDATA *ConfigNvData;
if ((DevicePath == NULL) || (Target == NULL) || (Lun == NULL)) {
return EFI_INVALID_PARAMETER;
}
if ((DevicePath->Type != MESSAGING_DEVICE_PATH) ||
(DevicePath->SubType != MSG_ISCSI_DP) ||
(DevicePathNodeLength (DevicePath) <= sizeof (ISCSI_DEVICE_PATH))
) {
return EFI_UNSUPPORTED;
}
Private = ISCSI_DRIVER_DATA_FROM_EXT_SCSI_PASS_THRU (This);
ConfigNvData = &Private->Session.ConfigData.NvData;
SetMem (*Target, TARGET_MAX_BYTES, 0xFF);
(*Target)[0] = 0;
if (AsciiStrCmp (ConfigNvData->TargetName, (CHAR8 *) DevicePath + sizeof (ISCSI_DEVICE_PATH)) != 0) {
return EFI_UNSUPPORTED;
}
CopyMem (Lun, ConfigNvData->BootLun, sizeof (UINT64));
return EFI_SUCCESS;
}
/**
Sends a SCSI Request Packet to a SCSI device that is attached to the SCSI channel.
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_EXT_SCSI_PASS_THRU_PROTOCOL instance.
@param[in] Target The Target is an array of size TARGET_MAX_BYTES and it
represents the id of the SCSI device to send the SCSI
Request Packet. Each transport driver may choose to
utilize a subset of this size to suit the needs
of transport target representation. For example, a
Fibre Channel driver may use only 8 bytes (WWN)
to represent an FC target.
@param[in] Lun The LUN of the SCSI device to send the SCSI Request Packet.
@param[in, out] Packet A pointer to the SCSI Request Packet to send to the
SCSI device specified by Target and Lun.
@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 SCSI Request Packet
completes.
@retval EFI_SUCCESS The SCSI Request Packet was sent by the host. For
bi-directional commands, InTransferLength bytes
were transferred from InDataBuffer.
For write and bi-directional commands, OutTransferLength
bytes were transferred by OutDataBuffer.
@retval EFI_BAD_BUFFER_SIZE The SCSI Request Packet was not executed.
The number of bytes that could be transferred is
returned in InTransferLength. For write and
bi-directional commands, OutTransferLength bytes
were transferred by OutDataBuffer.
@retval EFI_NOT_READY The SCSI Request Packet could not be sent because
there are too many SCSI Request Packets already
queued. The caller may retry later.
@retval EFI_DEVICE_ERROR A device error occurred while attempting to send
the SCSI Request Packet.
@retval EFI_INVALID_PARAMETER Target, Lun, or the contents of ScsiRequestPacket,
are invalid.
@retval EFI_UNSUPPORTED The command described by the SCSI Request Packet
is not supported by the host adapter.
This includes the case of Bi-directional SCSI
commands not supported by the implementation.
The SCSI Request Packet was not sent,
so no additional status information is available.
@retval EFI_TIMEOUT A timeout occurred while waiting for the SCSI
Request Packet to execute.
**/
EFI_STATUS
EFIAPI
IScsiExtScsiPassThruFunction (
IN EFI_EXT_SCSI_PASS_THRU_PROTOCOL *This,
IN UINT8 *Target,
IN UINT64 Lun,
IN OUT EFI_EXT_SCSI_PASS_THRU_SCSI_REQUEST_PACKET *Packet,
IN EFI_EVENT Event OPTIONAL
)
{
EFI_STATUS Status;
ISCSI_DRIVER_DATA *Private;
if (Target[0] != 0) {
return EFI_INVALID_PARAMETER;
}
if ((Packet == NULL) || (Packet->Cdb == NULL)) {
return EFI_INVALID_PARAMETER;
}
Status = IScsiExecuteScsiCommand (This, Target, Lun, Packet);
if ((Status != EFI_SUCCESS) && (Status != EFI_NOT_READY)) {
//
// Try to reinstate the session and re-execute the Scsi command.
//
Private = ISCSI_DRIVER_DATA_FROM_EXT_SCSI_PASS_THRU (This);
if (EFI_ERROR (IScsiSessionReinstatement (Private->Session))) {
return EFI_DEVICE_ERROR;
}
Status = IScsiExecuteScsiCommand (This, Target, Lun, Packet);
}
return Status;
}
/**
Used to allocate and build a device path node for a SCSI device on a SCSI channel.
@param[in] This A pointer to the EFI_EXT_SCSI_PASS_THRU_PROTOCOL instance.
@param[in] Target The Target is an array of size TARGET_MAX_BYTES and it specifies the
Target ID of the SCSI device for which a device path node is to be
allocated and built. Transport drivers may chose to utilize a subset of
this size to suit the representation of targets. For example, a Fibre
Channel driver may use only 8 bytes (WWN) in the array to represent a
FC target.
@param[in] Lun The LUN of the SCSI device for which a device path node is to be
allocated and built.
@param[in, out] DevicePath A pointer to a single device path node that describes the SCSI device
specified by Target and Lun. 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 SCSI device specified by
Target and Lun was allocated and returned in
DevicePath.
@retval EFI_INVALID_PARAMETER DevicePath is NULL.
@retval EFI_NOT_FOUND The SCSI devices specified by Target and Lun does not exist
on the SCSI channel.
@retval EFI_OUT_OF_RESOURCES There are not enough resources to allocate DevicePath.
**/
EFI_STATUS
EFIAPI
IScsiExtScsiPassThruBuildDevicePath (
IN EFI_EXT_SCSI_PASS_THRU_PROTOCOL *This,
IN UINT8 *Target,
IN UINT64 Lun,
IN OUT EFI_DEVICE_PATH_PROTOCOL **DevicePath
)
{
ISCSI_DRIVER_DATA *Private;
ISCSI_SESSION *Session;
ISCSI_SESSION_CONFIG_NVDATA *ConfigNvData;
ISCSI_CHAP_AUTH_CONFIG_NVDATA *AuthConfig;
EFI_DEV_PATH *Node;
UINTN DevPathNodeLen;
if (DevicePath == NULL) {
return EFI_INVALID_PARAMETER;
}
if (Target[0] != 0) {
return EFI_NOT_FOUND;
}
Private = ISCSI_DRIVER_DATA_FROM_EXT_SCSI_PASS_THRU (This);
Session = &Private->Session;
ConfigNvData = &Session->ConfigData.NvData;
AuthConfig = &Session->AuthData.AuthConfig;
if (CompareMem (&Lun, ConfigNvData->BootLun, sizeof (UINT64)) != 0) {
return EFI_NOT_FOUND;
}
DevPathNodeLen = sizeof (ISCSI_DEVICE_PATH) + AsciiStrLen (ConfigNvData->TargetName) + 1;
Node = AllocatePool (DevPathNodeLen);
if (Node == NULL) {
return EFI_OUT_OF_RESOURCES;
}
Node->DevPath.Type = MESSAGING_DEVICE_PATH;
Node->DevPath.SubType = MSG_ISCSI_DP;
SetDevicePathNodeLength (&Node->DevPath, (UINT16)DevPathNodeLen);
//
// 0 for TCP, others are reserved.
//
Node->Iscsi.NetworkProtocol = 0;
Node->Iscsi.LoginOption = 0;
switch (AuthConfig->CHAPType) {
case ISCSI_CHAP_NONE:
Node->Iscsi.LoginOption |= 0x0800;
break;
case ISCSI_CHAP_UNI:
Node->Iscsi.LoginOption |= 0x1000;
break;
default:
break;
}
CopyMem (&Node->Iscsi.Lun, ConfigNvData->BootLun, sizeof (UINT64));
Node->Iscsi.TargetPortalGroupTag = Session->TargetPortalGroupTag;
AsciiStrCpyS ((CHAR8 *) Node + sizeof (ISCSI_DEVICE_PATH), AsciiStrLen (ConfigNvData->TargetName) + 1, ConfigNvData->TargetName);
*DevicePath = (EFI_DEVICE_PATH_PROTOCOL *) Node;
return EFI_SUCCESS;
}
