/** @file The implementation of EFI_EXT_SCSI_PASS_THRU_PROTOCOL. Copyright (c) 2004 - 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. **/ #include "IScsiImpl.h" EFI_EXT_SCSI_PASS_THRU_PROTOCOL gIScsiExtScsiPassThruProtocolTemplate = { NULL, IScsiExtScsiPassThruFunction, IScsiExtScsiPassThruGetNextTargetLun, IScsiExtScsiPassThruBuildDevicePath, IScsiExtScsiPassThruGetTargetLun, IScsiExtScsiPassThruResetChannel, IScsiExtScsiPassThruResetTargetLun, IScsiExtScsiPassThruGetNextTarget }; /** 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 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 The EFI_EXT_SCSI_PASS_THRU_PROTOCOL instance. @param[in, out] Target On input, a pointer to the Target ID of a SCSI device present on the SCSI channel. On output, a pointer to the Target ID of the next SCSI device present on a SCSI channel. An input value of 0xFFFFFFFF 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_NOT_FOUND There are no more SCSI devices on this SCSI channel. @retval EFI_INVALID_PARAMETER Target is not 0xFFFFFFFF,and Target and Lun were not returned on a previous call to GetNextDevice(). **/ 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->SessionConfigData; 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; } /** Allocate and build a device path node for a SCSI device on a SCSI channel. @param[in] This Protocol instance pointer. @param[in] Target The Target ID of the SCSI device for which a device path node is to be allocated and built. @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_NOT_FOUND The SCSI devices specified by Target and Lun does not exist on the SCSI channel. @retval EFI_INVALID_PARAMETER DevicePath is NULL. @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->SessionConfigData; AuthConfig = Session->AuthData.CHAP.AuthConfig; if (CompareMem (&Lun, ConfigNvData->BootLun, sizeof (UINT64)) != 0) { return EFI_NOT_FOUND; } DevPathNodeLen = sizeof (ISCSI_DEVICE_PATH) + AsciiStrLen (ConfigNvData->TargetName) + 1; Node = AllocateZeroPool (DevPathNodeLen); if (Node == NULL) { return EFI_OUT_OF_RESOURCES; } Node->DevPath.Type = MESSAGING_DEVICE_PATH; Node->DevPath.SubType = MSG_ISCSI_DP; SetDevicePathNodeLength (&Node->DevPath, DevPathNodeLen); // // 0 for TCP, others are reserved. // Node->Iscsi.NetworkProtocol = 0; Node->Iscsi.LoginOption = 0; switch (Session->AuthType) { case ISCSI_AUTH_TYPE_NONE: Node->Iscsi.LoginOption |= 0x0800; break; case ISCSI_AUTH_TYPE_CHAP: // // Bit12: 0=CHAP_BI, 1=CHAP_UNI // if (AuthConfig->CHAPType == 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; } /** Translate a device path node to a Target ID and LUN. @param[in] This Protocol instance pointer. @param[in] DevicePath A pointer to the device path node that describes a SCSI device on the SCSI channel. @param[out] Target A pointer to the Target 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/Target/Lun is NULL. @retval EFI_UNSUPPORTED This driver does not support the device path node type in DevicePath. @retval EFI_NOT_FOUND A valid translation does not exist from DevicePath to a TargetID and LUN. **/ 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->SessionConfigData; 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; } /** Resets a SCSI channel. This operation resets all the SCSI devices connected to the SCSI channel. @param[in] This Protocol instance pointer. @retval EFI_UNSUPPORTED It is not supported. **/ EFI_STATUS EFIAPI IScsiExtScsiPassThruResetChannel ( IN EFI_EXT_SCSI_PASS_THRU_PROTOCOL *This ) { return EFI_UNSUPPORTED; } /** Resets a SCSI device that is connected to a SCSI channel. @param[in] This Protocol instance pointer. @param[in] Target The Target ID of the SCSI device to reset. @param[in] Lun The LUN of the SCSI device to reset. @retval EFI_UNSUPPORTED It is not supported. **/ EFI_STATUS EFIAPI IScsiExtScsiPassThruResetTargetLun ( IN EFI_EXT_SCSI_PASS_THRU_PROTOCOL *This, IN UINT8 *Target, IN UINT64 Lun ) { return EFI_UNSUPPORTED; } /** Retrieve the list of legal Target IDs for SCSI devices on a SCSI channel. @param[in] This A pointer to the EFI_EXT_SCSI_PASS_THRU_PROTOCOL instance. @param[in, out] Target (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. @retval EFI_SUCCESS The Target ID of the next SCSI device on the SCSI channel was returned in Target. @retval EFI_INVALID_PARAMETER Target or Lun is NULL. @retval EFI_TIMEOUT Target array is not all 0xF, and Target was not returned on a previous call to GetNextTarget(). @retval EFI_NOT_FOUND There are no more SCSI devices on this SCSI channel. **/ EFI_STATUS EFIAPI IScsiExtScsiPassThruGetNextTarget ( IN EFI_EXT_SCSI_PASS_THRU_PROTOCOL *This, IN OUT UINT8 **Target ) { UINT8 TargetId[TARGET_MAX_BYTES]; SetMem (TargetId, TARGET_MAX_BYTES, 0xFF); if (CompareMem (*Target, TargetId, TARGET_MAX_BYTES) == 0) { (*Target)[0] = 0; return EFI_SUCCESS; } else if ((*Target)[0] == 0) { return EFI_NOT_FOUND; } else { return EFI_INVALID_PARAMETER; } }