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audk/SecurityPkg/Tcg/Opal/OpalPasswordSmm/OpalIdeMode.c

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/** @file
This driver is used for Opal Password Feature support at IDE mode.
Copyright (c) 2016, 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 "OpalPasswordSmm.h"
/**
Write multiple words of Data to the IDE Data port.
Call the IO abstraction once to do the complete read,
not one word at a time
@param Port IO port to read
@param Count No. of UINT16's to read
@param Buffer Pointer to the Data Buffer for read
**/
VOID
EFIAPI
IdeWritePortWMultiple (
IN UINT16 Port,
IN UINTN Count,
IN UINT16 *Buffer
)
{
UINTN Index;
for (Index = 0; Index < Count; Index++) {
IoWrite16 (Port, Buffer[Index]);
}
}
/**
Reads multiple words of Data from the IDE Data port.
Call the IO abstraction once to do the complete read,
not one word at a time
@param Port IO port to read
@param Count Number of UINT16's to read
@param Buffer Pointer to the Data Buffer for read
**/
VOID
EFIAPI
IdeReadPortWMultiple (
IN UINT16 Port,
IN UINTN Count,
IN UINT16 *Buffer
)
{
UINTN Index;
for (Index = 0; Index < Count; Index++) {
Buffer[Count] = IoRead16 (Port);
}
}
/**
This function is used to analyze the Status Register and print out
some debug information and if there is ERR bit set in the Status
Register, the Error Register's Value is also be parsed and print out.
@param IdeRegisters A pointer to EFI_IDE_REGISTERS Data structure.
**/
VOID
EFIAPI
DumpAllIdeRegisters (
IN EFI_IDE_REGISTERS *IdeRegisters
)
{
ASSERT (IdeRegisters != NULL);
DEBUG_CODE_BEGIN ();
if ((IoRead8 (IdeRegisters->CmdOrStatus) & ATA_STSREG_DWF) != 0) {
DEBUG ((EFI_D_ERROR, "CheckRegisterStatus()-- %02x : Error : Write Fault\n", IoRead8 (IdeRegisters->CmdOrStatus)));
}
if ((IoRead8 (IdeRegisters->CmdOrStatus) & ATA_STSREG_CORR) != 0) {
DEBUG ((EFI_D_ERROR, "CheckRegisterStatus()-- %02x : Error : Corrected Data\n", IoRead8 (IdeRegisters->CmdOrStatus)));
}
if ((IoRead8 (IdeRegisters->CmdOrStatus) & ATA_STSREG_ERR) != 0) {
if ((IoRead8 (IdeRegisters->ErrOrFeature) & ATA_ERRREG_BBK) != 0) {
DEBUG ((EFI_D_ERROR, "CheckRegisterStatus()-- %02x : Error : Bad Block Detected\n", IoRead8 (IdeRegisters->ErrOrFeature)));
}
if ((IoRead8 (IdeRegisters->ErrOrFeature) & ATA_ERRREG_UNC) != 0) {
DEBUG ((EFI_D_ERROR, "CheckRegisterStatus()-- %02x : Error : Uncorrectable Data\n", IoRead8 (IdeRegisters->ErrOrFeature)));
}
if ((IoRead8 (IdeRegisters->ErrOrFeature) & ATA_ERRREG_MC) != 0) {
DEBUG ((EFI_D_ERROR, "CheckRegisterStatus()-- %02x : Error : Media Change\n", IoRead8 (IdeRegisters->ErrOrFeature)));
}
if ((IoRead8 (IdeRegisters->ErrOrFeature) & ATA_ERRREG_ABRT) != 0) {
DEBUG ((EFI_D_ERROR, "CheckRegisterStatus()-- %02x : Error : Abort\n", IoRead8 (IdeRegisters->ErrOrFeature)));
}
if ((IoRead8 (IdeRegisters->ErrOrFeature) & ATA_ERRREG_TK0NF) != 0) {
DEBUG ((EFI_D_ERROR, "CheckRegisterStatus()-- %02x : Error : Track 0 Not Found\n", IoRead8 (IdeRegisters->ErrOrFeature)));
}
if ((IoRead8 (IdeRegisters->ErrOrFeature) & ATA_ERRREG_AMNF) != 0) {
DEBUG ((EFI_D_ERROR, "CheckRegisterStatus()-- %02x : Error : Address Mark Not Found\n", IoRead8 (IdeRegisters->ErrOrFeature)));
}
}
DEBUG_CODE_END ();
}
/**
This function is used to analyze the Status Register and print out
some debug information and if there is ERR bit set in the Status
Register, the Error Register's Value is also be parsed and print out.
@param IdeRegisters A pointer to EFI_IDE_REGISTERS Data structure.
@retval EFI_SUCCESS No err information in the Status Register.
@retval EFI_DEVICE_ERROR Any err information in the Status Register.
**/
EFI_STATUS
EFIAPI
CheckStatusRegister (
IN EFI_IDE_REGISTERS *IdeRegisters
)
{
EFI_STATUS Status;
UINT8 StatusRegister;
ASSERT (IdeRegisters != NULL);
StatusRegister = IoRead8 (IdeRegisters->CmdOrStatus);
if ((StatusRegister & (ATA_STSREG_ERR | ATA_STSREG_DWF | ATA_STSREG_CORR)) == 0) {
Status = EFI_SUCCESS;
} else {
Status = EFI_DEVICE_ERROR;
}
return Status;
}
/**
This function is used to poll for the DRQ bit clear in the Status
Register. DRQ is cleared when the device is finished transferring Data.
So this function is called after Data transfer is finished.
@param IdeRegisters A pointer to EFI_IDE_REGISTERS Data structure.
@param Timeout The time to complete the command.
@retval EFI_SUCCESS DRQ bit clear within the time out.
@retval EFI_TIMEOUT DRQ bit not clear within the time out.
@note
Read Status Register will clear interrupt status.
**/
EFI_STATUS
EFIAPI
DRQClear (
IN EFI_IDE_REGISTERS *IdeRegisters,
IN UINT64 Timeout
)
{
UINT32 Delay;
UINT8 StatusRegister;
ASSERT (IdeRegisters != NULL);
Delay = (UINT32) (DivU64x32(Timeout, 1000) + 1);
do {
StatusRegister = IoRead8 (IdeRegisters->CmdOrStatus);
//
// wait for BSY == 0 and DRQ == 0
//
if ((StatusRegister & ATA_STSREG_BSY) == 0) {
if ((StatusRegister & ATA_STSREG_DRQ) == ATA_STSREG_DRQ) {
return EFI_DEVICE_ERROR;
} else {
return EFI_SUCCESS;
}
}
//
// Stall for 100 microseconds.
//
MicroSecondDelay (100);
Delay--;
} while (Delay > 0);
return EFI_TIMEOUT;
}
/**
This function is used to poll for the DRQ bit clear in the Alternate
Status Register. DRQ is cleared when the device is finished
transferring Data. So this function is called after Data transfer
is finished.
@param IdeRegisters A pointer to EFI_IDE_REGISTERS Data structure.
@param Timeout The time to complete the command.
@retval EFI_SUCCESS DRQ bit clear within the time out.
@retval EFI_TIMEOUT DRQ bit not clear within the time out.
@note Read Alternate Status Register will not clear interrupt status.
**/
EFI_STATUS
EFIAPI
DRQClear2 (
IN EFI_IDE_REGISTERS *IdeRegisters,
IN UINT64 Timeout
)
{
UINT32 Delay;
UINT8 AltRegister;
ASSERT (IdeRegisters != NULL);
Delay = (UINT32) (DivU64x32(Timeout, 1000) + 1);
do {
AltRegister = IoRead8 (IdeRegisters->AltOrDev);
//
// wait for BSY == 0 and DRQ == 0
//
if ((AltRegister & ATA_STSREG_BSY) == 0) {
if ((AltRegister & ATA_STSREG_DRQ) == ATA_STSREG_DRQ) {
return EFI_DEVICE_ERROR;
} else {
return EFI_SUCCESS;
}
}
//
// Stall for 100 microseconds.
//
MicroSecondDelay (100);
Delay--;
} while (Delay > 0);
return EFI_TIMEOUT;
}
/**
This function is used to poll for the DRQ bit set in the Alternate Status Register.
DRQ is set when the device is ready to transfer Data. So this function is called after
the command is sent to the device and before required Data is transferred.
@param IdeRegisters A pointer to EFI_IDE_REGISTERS Data structure.
@param Timeout The time to complete the command.
@retval EFI_SUCCESS DRQ bit set within the time out.
@retval EFI_TIMEOUT DRQ bit not set within the time out.
@retval EFI_ABORTED DRQ bit not set caused by the command abort.
@note Read Alternate Status Register will not clear interrupt status.
**/
EFI_STATUS
EFIAPI
DRQReady2 (
IN EFI_IDE_REGISTERS *IdeRegisters,
IN UINT64 Timeout
)
{
UINT32 Delay;
UINT8 AltRegister;
UINT8 ErrorRegister;
ASSERT (IdeRegisters != NULL);
Delay = (UINT32) (DivU64x32(Timeout, 1000) + 1);
do {
//
// Read Alternate Status Register will not clear interrupt status
//
AltRegister = IoRead8 (IdeRegisters->AltOrDev);
//
// BSY == 0 , DRQ == 1
//
if ((AltRegister & ATA_STSREG_BSY) == 0) {
if ((AltRegister & ATA_STSREG_ERR) == ATA_STSREG_ERR) {
ErrorRegister = IoRead8 (IdeRegisters->ErrOrFeature);
if ((ErrorRegister & ATA_ERRREG_ABRT) == ATA_ERRREG_ABRT) {
return EFI_ABORTED;
}
return EFI_DEVICE_ERROR;
}
if ((AltRegister & ATA_STSREG_DRQ) == ATA_STSREG_DRQ) {
return EFI_SUCCESS;
} else {
return EFI_NOT_READY;
}
}
//
// Stall for 100 microseconds.
//
MicroSecondDelay (100);
Delay--;
} while (Delay > 0);
return EFI_TIMEOUT;
}
/**
This function is used to poll for the BSY bit clear in the Status Register. BSY
is clear when the device is not busy. Every command must be sent after device is not busy.
@param IdeRegisters A pointer to EFI_IDE_REGISTERS Data structure.
@param Timeout The time to complete the command.
@retval EFI_SUCCESS BSY bit clear within the time out.
@retval EFI_TIMEOUT BSY bit not clear within the time out.
@note Read Status Register will clear interrupt status.
**/
EFI_STATUS
EFIAPI
WaitForBSYClear (
IN EFI_IDE_REGISTERS *IdeRegisters,
IN UINT64 Timeout
)
{
UINT32 Delay;
UINT8 StatusRegister;
ASSERT (IdeRegisters != NULL);
Delay = (UINT32) (DivU64x32(Timeout, 1000) + 1);
do {
StatusRegister = IoRead8 (IdeRegisters->CmdOrStatus);
if ((StatusRegister & ATA_STSREG_BSY) == 0x00) {
return EFI_SUCCESS;
}
//
// Stall for 100 microseconds.
//
MicroSecondDelay (100);
Delay--;
} while (Delay > 0);
return EFI_TIMEOUT;
}
/**
Get IDE i/o port registers' base addresses by mode.
In 'Compatibility' mode, use fixed addresses.
In Native-PCI mode, get base addresses from BARs in the PCI IDE controller's
Configuration Space.
The steps to get IDE i/o port registers' base addresses for each channel
as follows:
1. Examine the Programming Interface byte of the Class Code fields in PCI IDE
controller's Configuration Space to determine the operating mode.
2. a) In 'Compatibility' mode, use fixed addresses shown in the Table 1 below.
___________________________________________
| | Command Block | Control Block |
| Channel | Registers | Registers |
|___________|_______________|_______________|
| Primary | 1F0h - 1F7h | 3F6h - 3F7h |
|___________|_______________|_______________|
| Secondary | 170h - 177h | 376h - 377h |
|___________|_______________|_______________|
Table 1. Compatibility resource mappings
b) In Native-PCI mode, IDE registers are mapped into IO space using the BARs
in IDE controller's PCI Configuration Space, shown in the Table 2 below.
___________________________________________________
| | Command Block | Control Block |
| Channel | Registers | Registers |
|___________|___________________|___________________|
| Primary | BAR at offset 0x10| BAR at offset 0x14|
|___________|___________________|___________________|
| Secondary | BAR at offset 0x18| BAR at offset 0x1C|
|___________|___________________|___________________|
Table 2. BARs for Register Mapping
@param[in] Bus The bus number of ata host controller.
@param[in] Device The device number of ata host controller.
@param[in] Function The function number of ata host controller.
@param[in, out] IdeRegisters Pointer to EFI_IDE_REGISTERS which is used to
store the IDE i/o port registers' base addresses
@retval EFI_UNSUPPORTED Return this Value when the BARs is not IO type
@retval EFI_SUCCESS Get the Base address successfully
@retval Other Read the pci configureation Data error
**/
EFI_STATUS
EFIAPI
GetIdeRegisterIoAddr (
IN UINTN Bus,
IN UINTN Device,
IN UINTN Function,
IN OUT EFI_IDE_REGISTERS *IdeRegisters
)
{
UINT16 CommandBlockBaseAddr;
UINT16 ControlBlockBaseAddr;
UINT8 ClassCode;
UINT32 BaseAddress[4];
if (IdeRegisters == NULL) {
return EFI_INVALID_PARAMETER;
}
ClassCode = PciRead8 (PCI_LIB_ADDRESS (Bus, Device, Function, 0x9));
BaseAddress[0] = PciRead32 (PCI_LIB_ADDRESS (Bus, Device, Function, 0x10));
BaseAddress[1] = PciRead32 (PCI_LIB_ADDRESS (Bus, Device, Function, 0x14));
BaseAddress[2] = PciRead32 (PCI_LIB_ADDRESS (Bus, Device, Function, 0x18));
BaseAddress[3] = PciRead32 (PCI_LIB_ADDRESS (Bus, Device, Function, 0x1C));
if ((ClassCode & IDE_PRIMARY_OPERATING_MODE) == 0) {
CommandBlockBaseAddr = 0x1f0;
ControlBlockBaseAddr = 0x3f6;
} else {
//
// The BARs should be of IO type
//
if ((BaseAddress[0] & BIT0) == 0 ||
(BaseAddress[1] & BIT0) == 0) {
return EFI_UNSUPPORTED;
}
CommandBlockBaseAddr = (UINT16) (BaseAddress[0] & 0x0000fff8);
ControlBlockBaseAddr = (UINT16) ((BaseAddress[1] & 0x0000fffc) + 2);
}
//
// Calculate IDE primary channel I/O register base address.
//
IdeRegisters[EfiIdePrimary].Data = CommandBlockBaseAddr;
IdeRegisters[EfiIdePrimary].ErrOrFeature = (UINT16) (CommandBlockBaseAddr + 0x01);
IdeRegisters[EfiIdePrimary].SectorCount = (UINT16) (CommandBlockBaseAddr + 0x02);
IdeRegisters[EfiIdePrimary].SectorNumber = (UINT16) (CommandBlockBaseAddr + 0x03);
IdeRegisters[EfiIdePrimary].CylinderLsb = (UINT16) (CommandBlockBaseAddr + 0x04);
IdeRegisters[EfiIdePrimary].CylinderMsb = (UINT16) (CommandBlockBaseAddr + 0x05);
IdeRegisters[EfiIdePrimary].Head = (UINT16) (CommandBlockBaseAddr + 0x06);
IdeRegisters[EfiIdePrimary].CmdOrStatus = (UINT16) (CommandBlockBaseAddr + 0x07);
IdeRegisters[EfiIdePrimary].AltOrDev = ControlBlockBaseAddr;
if ((ClassCode & IDE_SECONDARY_OPERATING_MODE) == 0) {
CommandBlockBaseAddr = 0x170;
ControlBlockBaseAddr = 0x376;
} else {
//
// The BARs should be of IO type
//
if ((BaseAddress[2] & BIT0) == 0 ||
(BaseAddress[3] & BIT0) == 0) {
return EFI_UNSUPPORTED;
}
CommandBlockBaseAddr = (UINT16) (BaseAddress[2] & 0x0000fff8);
ControlBlockBaseAddr = (UINT16) ((BaseAddress[3] & 0x0000fffc) + 2);
}
//
// Calculate IDE secondary channel I/O register base address.
//
IdeRegisters[EfiIdeSecondary].Data = CommandBlockBaseAddr;
IdeRegisters[EfiIdeSecondary].ErrOrFeature = (UINT16) (CommandBlockBaseAddr + 0x01);
IdeRegisters[EfiIdeSecondary].SectorCount = (UINT16) (CommandBlockBaseAddr + 0x02);
IdeRegisters[EfiIdeSecondary].SectorNumber = (UINT16) (CommandBlockBaseAddr + 0x03);
IdeRegisters[EfiIdeSecondary].CylinderLsb = (UINT16) (CommandBlockBaseAddr + 0x04);
IdeRegisters[EfiIdeSecondary].CylinderMsb = (UINT16) (CommandBlockBaseAddr + 0x05);
IdeRegisters[EfiIdeSecondary].Head = (UINT16) (CommandBlockBaseAddr + 0x06);
IdeRegisters[EfiIdeSecondary].CmdOrStatus = (UINT16) (CommandBlockBaseAddr + 0x07);
IdeRegisters[EfiIdeSecondary].AltOrDev = ControlBlockBaseAddr;
return EFI_SUCCESS;
}
/**
Send ATA Ext command into device with NON_DATA protocol.
@param IdeRegisters A pointer to EFI_IDE_REGISTERS Data structure.
@param AtaCommandBlock A pointer to EFI_ATA_COMMAND_BLOCK Data structure.
@param Timeout The time to complete the command.
@retval EFI_SUCCESS Reading succeed
@retval EFI_DEVICE_ERROR Error executing commands on this device.
**/
EFI_STATUS
EFIAPI
AtaIssueCommand (
IN EFI_IDE_REGISTERS *IdeRegisters,
IN EFI_ATA_COMMAND_BLOCK *AtaCommandBlock,
IN UINT64 Timeout
)
{
EFI_STATUS Status;
UINT8 DeviceHead;
UINT8 AtaCommand;
ASSERT (IdeRegisters != NULL);
ASSERT (AtaCommandBlock != NULL);
DeviceHead = AtaCommandBlock->AtaDeviceHead;
AtaCommand = AtaCommandBlock->AtaCommand;
Status = WaitForBSYClear (IdeRegisters, Timeout);
if (EFI_ERROR (Status)) {
return EFI_DEVICE_ERROR;
}
//
// Select device (bit4), set LBA mode(bit6) (use 0xe0 for compatibility)
//
IoWrite8 (IdeRegisters->Head, (UINT8) (0xe0 | DeviceHead));
//
// set all the command parameters
// Before write to all the following registers, BSY and DRQ must be 0.
//
Status = DRQClear2 (IdeRegisters, Timeout);
if (EFI_ERROR (Status)) {
return EFI_DEVICE_ERROR;
}
//
// Fill the feature register, which is a two-byte FIFO. Need write twice.
//
IoWrite8 (IdeRegisters->ErrOrFeature, AtaCommandBlock->AtaFeaturesExp);
IoWrite8 (IdeRegisters->ErrOrFeature, AtaCommandBlock->AtaFeatures);
//
// Fill the sector count register, which is a two-byte FIFO. Need write twice.
//
IoWrite8 (IdeRegisters->SectorCount, AtaCommandBlock->AtaSectorCountExp);
IoWrite8 (IdeRegisters->SectorCount, AtaCommandBlock->AtaSectorCount);
//
// Fill the start LBA registers, which are also two-byte FIFO
//
IoWrite8 (IdeRegisters->SectorNumber, AtaCommandBlock->AtaSectorNumberExp);
IoWrite8 (IdeRegisters->SectorNumber, AtaCommandBlock->AtaSectorNumber);
IoWrite8 (IdeRegisters->CylinderLsb, AtaCommandBlock->AtaCylinderLowExp);
IoWrite8 (IdeRegisters->CylinderLsb, AtaCommandBlock->AtaCylinderLow);
IoWrite8 (IdeRegisters->CylinderMsb, AtaCommandBlock->AtaCylinderHighExp);
IoWrite8 (IdeRegisters->CylinderMsb, AtaCommandBlock->AtaCylinderHigh);
//
// Send command via Command Register
//
IoWrite8 (IdeRegisters->CmdOrStatus, AtaCommand);
//
// Stall at least 400 microseconds.
//
MicroSecondDelay (400);
return EFI_SUCCESS;
}
/**
This function is used to send out ATA commands conforms to the PIO Data In Protocol.
@param IdeRegisters A pointer to EFI_IDE_REGISTERS Data structure.
@param Buffer A pointer to the source Buffer for the Data.
@param ByteCount The Length of the Data.
@param Read Flag used to determine the Data transfer direction.
Read equals 1, means Data transferred from device to host;
Read equals 0, means Data transferred from host to device.
@param AtaCommandBlock A pointer to EFI_ATA_COMMAND_BLOCK Data structure.
@param AtaStatusBlock A pointer to EFI_ATA_STATUS_BLOCK Data structure.
@param Timeout The time to complete the command.
@retval EFI_SUCCESS send out the ATA command and device send required Data successfully.
@retval EFI_DEVICE_ERROR command sent failed.
**/
EFI_STATUS
EFIAPI
AtaPioDataInOut (
IN EFI_IDE_REGISTERS *IdeRegisters,
IN OUT VOID *Buffer,
IN UINT64 ByteCount,
IN BOOLEAN Read,
IN EFI_ATA_COMMAND_BLOCK *AtaCommandBlock,
IN OUT EFI_ATA_STATUS_BLOCK *AtaStatusBlock,
IN UINT64 Timeout
)
{
UINTN WordCount;
UINTN Increment;
UINT16 *Buffer16;
EFI_STATUS Status;
if ((IdeRegisters == NULL) || (Buffer == NULL) || (AtaCommandBlock == NULL)) {
return EFI_INVALID_PARAMETER;
}
//
// Issue ATA command
//
Status = AtaIssueCommand (IdeRegisters, AtaCommandBlock, Timeout);
if (EFI_ERROR (Status)) {
Status = EFI_DEVICE_ERROR;
goto Exit;
}
Buffer16 = (UINT16 *) Buffer;
//
// According to PIO Data in protocol, host can perform a series of reads to
// the Data register after each time device set DRQ ready;
// The Data Size of "a series of read" is command specific.
// For most ATA command, Data Size received from device will not exceed
// 1 sector, hence the Data Size for "a series of read" can be the whole Data
// Size of one command request.
// For ATA command such as Read Sector command, the Data Size of one ATA
// command request is often larger than 1 sector, according to the
// Read Sector command, the Data Size of "a series of read" is exactly 1
// sector.
// Here for simplification reason, we specify the Data Size for
// "a series of read" to 1 sector (256 words) if Data Size of one ATA command
// request is larger than 256 words.
//
Increment = 256;
//
// used to record bytes of currently transfered Data
//
WordCount = 0;
while (WordCount < RShiftU64(ByteCount, 1)) {
//
// Poll DRQ bit set, Data transfer can be performed only when DRQ is ready
//
Status = DRQReady2 (IdeRegisters, Timeout);
if (EFI_ERROR (Status)) {
Status = EFI_DEVICE_ERROR;
goto Exit;
}
//
// Get the byte count for one series of read
//
if ((WordCount + Increment) > RShiftU64(ByteCount, 1)) {
Increment = (UINTN)(RShiftU64(ByteCount, 1) - WordCount);
}
if (Read) {
IdeReadPortWMultiple (
IdeRegisters->Data,
Increment,
Buffer16
);
} else {
IdeWritePortWMultiple (
IdeRegisters->Data,
Increment,
Buffer16
);
}
Status = CheckStatusRegister (IdeRegisters);
if (EFI_ERROR (Status)) {
Status = EFI_DEVICE_ERROR;
goto Exit;
}
WordCount += Increment;
Buffer16 += Increment;
}
Status = DRQClear (IdeRegisters, Timeout);
if (EFI_ERROR (Status)) {
Status = EFI_DEVICE_ERROR;
goto Exit;
}
Exit:
//
// Dump All Ide registers to ATA_STATUS_BLOCK
//
DumpAllIdeRegisters (IdeRegisters);
return Status;
}
/**
Sends out an ATA Identify Command to the specified device.
This function sends out the ATA Identify Command to the
specified device. Only ATA device responses to this command. If
the command succeeds, it returns the Identify Data structure which
contains information about the device. This function extracts the
information it needs to fill the IDE_BLK_IO_DEV Data structure,
including device type, media block Size, media capacity, and etc.
@param IdeRegisters A pointer to EFI_IDE_REGISTERS Data structure.
@param Channel The channel number of device.
@param Device The device number of device.
@param Buffer A pointer to Data Buffer which is used to contain IDENTIFY Data.
@retval EFI_SUCCESS Identify ATA device successfully.
@retval EFI_DEVICE_ERROR ATA Identify Device Command failed or device is not ATA device.
@retval EFI_OUT_OF_RESOURCES Allocate memory failed.
**/
EFI_STATUS
EFIAPI
AtaIdentify (
IN EFI_IDE_REGISTERS *IdeRegisters,
IN UINT8 Channel,
IN UINT8 Device,
IN OUT ATA_IDENTIFY_DATA *Buffer
)
{
EFI_STATUS Status;
EFI_ATA_COMMAND_BLOCK AtaCommandBlock;
ZeroMem (&AtaCommandBlock, sizeof (EFI_ATA_COMMAND_BLOCK));
AtaCommandBlock.AtaCommand = ATA_CMD_IDENTIFY_DRIVE;
AtaCommandBlock.AtaDeviceHead = (UINT8)(Device << 0x4);
Status = AtaPioDataInOut (
IdeRegisters,
Buffer,
sizeof (ATA_IDENTIFY_DATA),
TRUE,
&AtaCommandBlock,
NULL,
ATA_TIMEOUT
);
return Status;
}
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