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420 lines
16 KiB
C
420 lines
16 KiB
C
/** @file
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The implementation of EFI_EXT_SCSI_PASS_THRU_PROTOCOL.
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Copyright (c) 2004 - 2018, Intel Corporation. All rights reserved.<BR>
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SPDX-License-Identifier: BSD-2-Clause-Patent
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**/
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#include "IScsiImpl.h"
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EFI_EXT_SCSI_PASS_THRU_PROTOCOL gIScsiExtScsiPassThruProtocolTemplate = {
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NULL,
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IScsiExtScsiPassThruFunction,
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IScsiExtScsiPassThruGetNextTargetLun,
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IScsiExtScsiPassThruBuildDevicePath,
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IScsiExtScsiPassThruGetTargetLun,
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IScsiExtScsiPassThruResetChannel,
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IScsiExtScsiPassThruResetTargetLun,
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IScsiExtScsiPassThruGetNextTarget
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};
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/**
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Sends a SCSI Request Packet to a SCSI device that is attached to the SCSI channel.
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This function supports both blocking I/O and nonblocking I/O. The blocking I/O
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functionality is required, and the nonblocking I/O functionality is optional.
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@param[in] This A pointer to the EFI_EXT_SCSI_PASS_THRU_PROTOCOL instance.
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@param[in] Target The Target is an array of size TARGET_MAX_BYTES and it
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represents the id of the SCSI device to send the SCSI
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Request Packet. Each transport driver may choose to
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utilize a subset of this size to suit the needs
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of transport target representation. For example, a
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Fibre Channel driver may use only 8 bytes (WWN)
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to represent an FC target.
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@param[in] Lun The LUN of the SCSI device to send the SCSI Request Packet.
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@param[in, out] Packet A pointer to the SCSI Request Packet to send to the
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SCSI device specified by Target and Lun.
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@param[in] Event If nonblocking I/O is not supported then Event is ignored,
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and blocking I/O is performed. If Event is NULL, then
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blocking I/O is performed. If Event is not NULL and non
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blocking I/O is supported, then nonblocking I/O is performed,
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and Event will be signaled when the SCSI Request Packet
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completes.
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@retval EFI_SUCCESS The SCSI Request Packet was sent by the host. For
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bi-directional commands, InTransferLength bytes
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were transferred from InDataBuffer.
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For write and bi-directional commands, OutTransferLength
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bytes were transferred by OutDataBuffer.
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@retval EFI_BAD_BUFFER_SIZE The SCSI Request Packet was not executed.
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The number of bytes that could be transferred is
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returned in InTransferLength. For write and
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bi-directional commands, OutTransferLength bytes
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were transferred by OutDataBuffer.
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@retval EFI_NOT_READY The SCSI Request Packet could not be sent because
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there are too many SCSI Request Packets already
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queued. The caller may retry later.
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@retval EFI_DEVICE_ERROR A device error occurred while attempting to send
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the SCSI Request Packet.
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@retval EFI_INVALID_PARAMETER Target, Lun, or the contents of ScsiRequestPacket,
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are invalid.
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@retval EFI_UNSUPPORTED The command described by the SCSI Request Packet
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is not supported by the host adapter.
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This includes the case of Bi-directional SCSI
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commands not supported by the implementation.
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The SCSI Request Packet was not sent,
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so no additional status information is available.
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@retval EFI_TIMEOUT A timeout occurred while waiting for the SCSI
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Request Packet to execute.
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**/
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EFI_STATUS
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EFIAPI
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IScsiExtScsiPassThruFunction (
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IN EFI_EXT_SCSI_PASS_THRU_PROTOCOL *This,
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IN UINT8 *Target,
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IN UINT64 Lun,
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IN OUT EFI_EXT_SCSI_PASS_THRU_SCSI_REQUEST_PACKET *Packet,
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IN EFI_EVENT Event OPTIONAL
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)
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{
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EFI_STATUS Status;
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ISCSI_DRIVER_DATA *Private;
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if (Target[0] != 0) {
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return EFI_INVALID_PARAMETER;
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}
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if ((Packet == NULL) || (Packet->Cdb == NULL)) {
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return EFI_INVALID_PARAMETER;
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}
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Status = IScsiExecuteScsiCommand (This, Target, Lun, Packet);
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if ((Status != EFI_SUCCESS) && (Status != EFI_NOT_READY)) {
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//
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// Try to reinstate the session and re-execute the Scsi command.
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//
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Private = ISCSI_DRIVER_DATA_FROM_EXT_SCSI_PASS_THRU (This);
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if (EFI_ERROR (IScsiSessionReinstatement (Private->Session))) {
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return EFI_DEVICE_ERROR;
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}
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Status = IScsiExecuteScsiCommand (This, Target, Lun, Packet);
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}
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return Status;
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}
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/**
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Used to retrieve the list of legal Target IDs and LUNs for SCSI devices on
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a SCSI channel. These can either be the list SCSI devices that are actually
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present on the SCSI channel, or the list of legal Target Ids and LUNs for the
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SCSI channel. Regardless, the caller of this function must probe the Target ID
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and LUN returned to see if a SCSI device is actually present at that location
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on the SCSI channel.
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@param[in] This The EFI_EXT_SCSI_PASS_THRU_PROTOCOL instance.
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@param[in, out] Target On input, a pointer to the Target ID of a SCSI
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device present on the SCSI channel. On output, a
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pointer to the Target ID of the next SCSI device
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present on a SCSI channel. An input value of
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0xFFFFFFFF retrieves the Target ID of the first
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SCSI device present on a SCSI channel.
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@param[in, out] Lun On input, a pointer to the LUN of a SCSI device
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present on the SCSI channel. On output, a pointer
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to the LUN of the next SCSI device present on a
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SCSI channel.
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@retval EFI_SUCCESS The Target ID and Lun of the next SCSI device on
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the SCSI channel was returned in Target and Lun.
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@retval EFI_NOT_FOUND There are no more SCSI devices on this SCSI
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channel.
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@retval EFI_INVALID_PARAMETER Target is not 0xFFFFFFFF,and Target and Lun were
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not returned on a previous call to
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GetNextDevice().
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**/
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EFI_STATUS
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EFIAPI
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IScsiExtScsiPassThruGetNextTargetLun (
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IN EFI_EXT_SCSI_PASS_THRU_PROTOCOL *This,
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IN OUT UINT8 **Target,
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IN OUT UINT64 *Lun
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)
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{
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ISCSI_DRIVER_DATA *Private;
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ISCSI_SESSION_CONFIG_NVDATA *ConfigNvData;
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UINT8 TargetId[TARGET_MAX_BYTES];
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Private = ISCSI_DRIVER_DATA_FROM_EXT_SCSI_PASS_THRU (This);
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ConfigNvData = &Private->Session->ConfigData->SessionConfigData;
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if ((*Target)[0] == 0 && (CompareMem (Lun, ConfigNvData->BootLun, sizeof (UINT64)) == 0)) {
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//
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// Only one <Target, Lun> pair per iSCSI Driver instance.
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//
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return EFI_NOT_FOUND;
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}
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SetMem (TargetId, TARGET_MAX_BYTES, 0xFF);
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if (CompareMem (*Target, TargetId, TARGET_MAX_BYTES) == 0) {
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(*Target)[0] = 0;
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CopyMem (Lun, ConfigNvData->BootLun, sizeof (UINT64));
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return EFI_SUCCESS;
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}
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return EFI_INVALID_PARAMETER;
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}
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/**
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Allocate and build a device path node for a SCSI device on a SCSI channel.
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@param[in] This Protocol instance pointer.
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@param[in] Target The Target ID of the SCSI device for which a
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device path node is to be allocated and built.
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@param[in] Lun The LUN of the SCSI device for which a device
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path node is to be allocated and built.
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@param[in, out] DevicePath A pointer to a single device path node that
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describes the SCSI device specified by Target and
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Lun. This function is responsible for allocating
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the buffer DevicePath with the boot service
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AllocatePool(). It is the caller's
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responsibility to free DevicePath when the caller
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is finished with DevicePath.
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@retval EFI_SUCCESS The device path node that describes the SCSI
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device specified by Target and Lun was allocated
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and returned in DevicePath.
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@retval EFI_NOT_FOUND The SCSI devices specified by Target and Lun does
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not exist on the SCSI channel.
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@retval EFI_INVALID_PARAMETER DevicePath is NULL.
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@retval EFI_OUT_OF_RESOURCES There are not enough resources to allocate
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DevicePath.
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**/
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EFI_STATUS
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EFIAPI
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IScsiExtScsiPassThruBuildDevicePath (
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IN EFI_EXT_SCSI_PASS_THRU_PROTOCOL *This,
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IN UINT8 *Target,
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IN UINT64 Lun,
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IN OUT EFI_DEVICE_PATH_PROTOCOL **DevicePath
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)
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{
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ISCSI_DRIVER_DATA *Private;
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ISCSI_SESSION *Session;
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ISCSI_SESSION_CONFIG_NVDATA *ConfigNvData;
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ISCSI_CHAP_AUTH_CONFIG_NVDATA *AuthConfig;
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EFI_DEV_PATH *Node;
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UINTN DevPathNodeLen;
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if (DevicePath == NULL) {
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return EFI_INVALID_PARAMETER;
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}
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if (Target[0] != 0) {
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return EFI_NOT_FOUND;
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}
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Private = ISCSI_DRIVER_DATA_FROM_EXT_SCSI_PASS_THRU (This);
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Session = Private->Session;
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ConfigNvData = &Session->ConfigData->SessionConfigData;
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AuthConfig = Session->AuthData.CHAP.AuthConfig;
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if (CompareMem (&Lun, ConfigNvData->BootLun, sizeof (UINT64)) != 0) {
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return EFI_NOT_FOUND;
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}
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DevPathNodeLen = sizeof (ISCSI_DEVICE_PATH) + AsciiStrLen (ConfigNvData->TargetName) + 1;
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Node = AllocateZeroPool (DevPathNodeLen);
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if (Node == NULL) {
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return EFI_OUT_OF_RESOURCES;
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}
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Node->DevPath.Type = MESSAGING_DEVICE_PATH;
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Node->DevPath.SubType = MSG_ISCSI_DP;
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SetDevicePathNodeLength (&Node->DevPath, DevPathNodeLen);
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//
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// 0 for TCP, others are reserved.
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//
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Node->Iscsi.NetworkProtocol = 0;
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Node->Iscsi.LoginOption = 0;
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switch (Session->AuthType) {
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case ISCSI_AUTH_TYPE_NONE:
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Node->Iscsi.LoginOption |= 0x0800;
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break;
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case ISCSI_AUTH_TYPE_CHAP:
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//
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// Bit12: 0=CHAP_BI, 1=CHAP_UNI
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//
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if (AuthConfig->CHAPType == ISCSI_CHAP_UNI) {
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Node->Iscsi.LoginOption |= 0x1000;
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}
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break;
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default:
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break;
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}
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CopyMem (&Node->Iscsi.Lun, ConfigNvData->BootLun, sizeof (UINT64));
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Node->Iscsi.TargetPortalGroupTag = Session->TargetPortalGroupTag;
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AsciiStrCpyS ((CHAR8 *) Node + sizeof (ISCSI_DEVICE_PATH), AsciiStrLen (ConfigNvData->TargetName) + 1, ConfigNvData->TargetName);
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*DevicePath = (EFI_DEVICE_PATH_PROTOCOL *) Node;
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return EFI_SUCCESS;
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}
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/**
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Translate a device path node to a Target ID and LUN.
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@param[in] This Protocol instance pointer.
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@param[in] DevicePath A pointer to the device path node that describes
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a SCSI device on the SCSI channel.
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@param[out] Target A pointer to the Target ID of a SCSI device on
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the SCSI channel.
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@param[out] Lun A pointer to the LUN of a SCSI device on the SCSI
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channel.
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@retval EFI_SUCCESS DevicePath was successfully translated to a
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Target ID and LUN, and they were returned in
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Target and Lun.
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@retval EFI_INVALID_PARAMETER DevicePath/Target/Lun is NULL.
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@retval EFI_UNSUPPORTED This driver does not support the device path node
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type in DevicePath.
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@retval EFI_NOT_FOUND A valid translation does not exist from DevicePath
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to a TargetID and LUN.
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**/
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EFI_STATUS
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EFIAPI
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IScsiExtScsiPassThruGetTargetLun (
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IN EFI_EXT_SCSI_PASS_THRU_PROTOCOL *This,
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IN EFI_DEVICE_PATH_PROTOCOL *DevicePath,
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OUT UINT8 **Target,
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OUT UINT64 *Lun
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)
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{
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ISCSI_DRIVER_DATA *Private;
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ISCSI_SESSION_CONFIG_NVDATA *ConfigNvData;
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if ((DevicePath == NULL) || (Target == NULL) || (Lun == NULL)) {
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return EFI_INVALID_PARAMETER;
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}
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if ((DevicePath->Type != MESSAGING_DEVICE_PATH) ||
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(DevicePath->SubType != MSG_ISCSI_DP) ||
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(DevicePathNodeLength (DevicePath) <= sizeof (ISCSI_DEVICE_PATH))
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) {
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return EFI_UNSUPPORTED;
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}
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Private = ISCSI_DRIVER_DATA_FROM_EXT_SCSI_PASS_THRU (This);
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ConfigNvData = &Private->Session->ConfigData->SessionConfigData;
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SetMem (*Target, TARGET_MAX_BYTES, 0xFF);
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(*Target)[0] = 0;
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if (AsciiStrCmp (ConfigNvData->TargetName, (CHAR8 *) DevicePath + sizeof (ISCSI_DEVICE_PATH)) != 0) {
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return EFI_UNSUPPORTED;
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}
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CopyMem (Lun, ConfigNvData->BootLun, sizeof (UINT64));
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return EFI_SUCCESS;
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}
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/**
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Resets a SCSI channel. This operation resets all the SCSI devices connected to
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the SCSI channel.
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@param[in] This Protocol instance pointer.
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@retval EFI_UNSUPPORTED It is not supported.
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**/
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EFI_STATUS
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EFIAPI
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IScsiExtScsiPassThruResetChannel (
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IN EFI_EXT_SCSI_PASS_THRU_PROTOCOL *This
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)
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{
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return EFI_UNSUPPORTED;
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}
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/**
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Resets a SCSI device that is connected to a SCSI channel.
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@param[in] This Protocol instance pointer.
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@param[in] Target The Target ID of the SCSI device to reset.
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@param[in] Lun The LUN of the SCSI device to reset.
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@retval EFI_UNSUPPORTED It is not supported.
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**/
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EFI_STATUS
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EFIAPI
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IScsiExtScsiPassThruResetTargetLun (
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IN EFI_EXT_SCSI_PASS_THRU_PROTOCOL *This,
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IN UINT8 *Target,
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IN UINT64 Lun
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)
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{
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return EFI_UNSUPPORTED;
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}
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/**
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Retrieve the list of legal Target IDs for SCSI devices on a SCSI channel.
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@param[in] This A pointer to the EFI_EXT_SCSI_PASS_THRU_PROTOCOL
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instance.
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@param[in, out] Target (TARGET_MAX_BYTES) of a SCSI device present on
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the SCSI channel. On output, a pointer to the
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Target ID (an array of TARGET_MAX_BYTES) of the
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next SCSI device present on a SCSI channel.
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An input value of 0xF(all bytes in the array are 0xF)
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in the Target array retrieves the Target ID of the
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first SCSI device present on a SCSI channel.
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@retval EFI_SUCCESS The Target ID of the next SCSI device on the SCSI
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channel was returned in Target.
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@retval EFI_INVALID_PARAMETER Target or Lun is NULL.
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@retval EFI_TIMEOUT Target array is not all 0xF, and Target was not
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returned on a previous call to GetNextTarget().
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@retval EFI_NOT_FOUND There are no more SCSI devices on this SCSI channel.
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**/
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EFI_STATUS
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EFIAPI
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IScsiExtScsiPassThruGetNextTarget (
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IN EFI_EXT_SCSI_PASS_THRU_PROTOCOL *This,
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IN OUT UINT8 **Target
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)
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{
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UINT8 TargetId[TARGET_MAX_BYTES];
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SetMem (TargetId, TARGET_MAX_BYTES, 0xFF);
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if (CompareMem (*Target, TargetId, TARGET_MAX_BYTES) == 0) {
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(*Target)[0] = 0;
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return EFI_SUCCESS;
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} else if ((*Target)[0] == 0) {
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return EFI_NOT_FOUND;
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} else {
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return EFI_INVALID_PARAMETER;
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}
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}
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