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audk/OvmfPkg/SataControllerDxe/SataController.c

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/** @file
This driver module produces IDE_CONTROLLER_INIT protocol for Sata Controllers.
Copyright (c) 2011, Intel Corporation. All rights reserved.<BR>
SPDX-License-Identifier: BSD-2-Clause-Patent
**/
#include "SataController.h"
///
/// EFI_DRIVER_BINDING_PROTOCOL instance
///
EFI_DRIVER_BINDING_PROTOCOL gSataControllerDriverBinding = {
SataControllerSupported,
SataControllerStart,
SataControllerStop,
0xa,
NULL,
NULL
};
/**
Read AHCI Operation register.
@param PciIo The PCI IO protocol instance.
@param Offset The operation register offset.
@return The register content read.
**/
UINT32
EFIAPI
AhciReadReg (
IN EFI_PCI_IO_PROTOCOL *PciIo,
IN UINT32 Offset
)
{
UINT32 Data;
ASSERT (PciIo != NULL);
Data = 0;
PciIo->Mem.Read (
PciIo,
EfiPciIoWidthUint32,
AHCI_BAR_INDEX,
(UINT64) Offset,
1,
&Data
);
return Data;
}
/**
Write AHCI Operation register.
@param PciIo The PCI IO protocol instance.
@param Offset The operation register offset.
@param Data The data used to write down.
**/
VOID
EFIAPI
AhciWriteReg (
IN EFI_PCI_IO_PROTOCOL *PciIo,
IN UINT32 Offset,
IN UINT32 Data
)
{
ASSERT (PciIo != NULL);
PciIo->Mem.Write (
PciIo,
EfiPciIoWidthUint32,
AHCI_BAR_INDEX,
(UINT64) Offset,
1,
&Data
);
return;
}
/**
This function is used to calculate the best PIO mode supported by specific IDE device
@param IdentifyData The identify data of specific IDE device.
@param DisPioMode Disqualified PIO modes collection.
@param SelectedMode Available PIO modes collection.
@retval EFI_SUCCESS Best PIO modes are returned.
@retval EFI_UNSUPPORTED The device doesn't support PIO mode,
or all supported modes have been disqualified.
**/
EFI_STATUS
CalculateBestPioMode (
IN EFI_IDENTIFY_DATA *IdentifyData,
IN UINT16 *DisPioMode OPTIONAL,
OUT UINT16 *SelectedMode
)
{
UINT16 PioMode;
UINT16 AdvancedPioMode;
UINT16 Temp;
UINT16 Index;
UINT16 MinimumPioCycleTime;
Temp = 0xff;
PioMode = (UINT8) (((ATA5_IDENTIFY_DATA *) (&(IdentifyData->AtaData)))->pio_cycle_timing >> 8);
//
// See whether Identify Data word 64 - 70 are valid
//
if ((IdentifyData->AtaData.field_validity & 0x02) == 0x02) {
AdvancedPioMode = IdentifyData->AtaData.advanced_pio_modes;
DEBUG ((DEBUG_INFO, "CalculateBestPioMode: AdvancedPioMode = %x\n", AdvancedPioMode));
for (Index = 0; Index < 8; Index++) {
if ((AdvancedPioMode & 0x01) != 0) {
Temp = Index;
}
AdvancedPioMode >>= 1;
}
//
// If Temp is modified, mean the advanced_pio_modes is not zero;
// if Temp is not modified, mean there is no advanced PIO mode supported,
// the best PIO Mode is the value in pio_cycle_timing.
//
if (Temp != 0xff) {
AdvancedPioMode = (UINT16) (Temp + 3);
} else {
AdvancedPioMode = PioMode;
}
//
// Limit the PIO mode to at most PIO4.
//
PioMode = (UINT16) MIN (AdvancedPioMode, 4);
MinimumPioCycleTime = IdentifyData->AtaData.min_pio_cycle_time_with_flow_control;
if (MinimumPioCycleTime <= 120) {
PioMode = (UINT16) MIN (4, PioMode);
} else if (MinimumPioCycleTime <= 180) {
PioMode = (UINT16) MIN (3, PioMode);
} else if (MinimumPioCycleTime <= 240) {
PioMode = (UINT16) MIN (2, PioMode);
} else {
PioMode = 0;
}
//
// Degrade the PIO mode if the mode has been disqualified
//
if (DisPioMode != NULL) {
if (*DisPioMode < 2) {
return EFI_UNSUPPORTED; // no mode below ATA_PIO_MODE_BELOW_2
}
if (PioMode >= *DisPioMode) {
PioMode = (UINT16) (*DisPioMode - 1);
}
}
if (PioMode < 2) {
*SelectedMode = 1; // ATA_PIO_MODE_BELOW_2;
} else {
*SelectedMode = PioMode; // ATA_PIO_MODE_2 to ATA_PIO_MODE_4;
}
} else {
//
// Identify Data word 64 - 70 are not valid
// Degrade the PIO mode if the mode has been disqualified
//
if (DisPioMode != NULL) {
if (*DisPioMode < 2) {
return EFI_UNSUPPORTED; // no mode below ATA_PIO_MODE_BELOW_2
}
if (PioMode == *DisPioMode) {
PioMode--;
}
}
if (PioMode < 2) {
*SelectedMode = 1; // ATA_PIO_MODE_BELOW_2;
} else {
*SelectedMode = 2; // ATA_PIO_MODE_2;
}
}
return EFI_SUCCESS;
}
/**
This function is used to calculate the best UDMA mode supported by specific IDE device
@param IdentifyData The identify data of specific IDE device.
@param DisUDmaMode Disqualified UDMA modes collection.
@param SelectedMode Available UDMA modes collection.
@retval EFI_SUCCESS Best UDMA modes are returned.
@retval EFI_UNSUPPORTED The device doesn't support UDMA mode,
or all supported modes have been disqualified.
**/
EFI_STATUS
CalculateBestUdmaMode (
IN EFI_IDENTIFY_DATA *IdentifyData,
IN UINT16 *DisUDmaMode OPTIONAL,
OUT UINT16 *SelectedMode
)
{
UINT16 TempMode;
UINT16 DeviceUDmaMode;
DeviceUDmaMode = 0;
//
// Check whether the WORD 88 (supported UltraDMA by drive) is valid
//
if ((IdentifyData->AtaData.field_validity & 0x04) == 0x00) {
return EFI_UNSUPPORTED;
}
DeviceUDmaMode = IdentifyData->AtaData.ultra_dma_mode;
DEBUG ((DEBUG_INFO, "CalculateBestUdmaMode: DeviceUDmaMode = %x\n", DeviceUDmaMode));
DeviceUDmaMode &= 0x3f;
TempMode = 0; // initialize it to UDMA-0
while ((DeviceUDmaMode >>= 1) != 0) {
TempMode++;
}
//
// Degrade the UDMA mode if the mode has been disqualified
//
if (DisUDmaMode != NULL) {
if (*DisUDmaMode == 0) {
*SelectedMode = 0;
return EFI_UNSUPPORTED; // no mode below ATA_UDMA_MODE_0
}
if (TempMode >= *DisUDmaMode) {
TempMode = (UINT16) (*DisUDmaMode - 1);
}
}
//
// Possible returned mode is between ATA_UDMA_MODE_0 and ATA_UDMA_MODE_5
//
*SelectedMode = TempMode;
return EFI_SUCCESS;
}
/**
The Entry Point of module. It follows the standard UEFI driver model.
@param[in] ImageHandle The firmware allocated handle for the EFI image.
@param[in] SystemTable A pointer to the EFI System Table.
@retval EFI_SUCCESS The entry point is executed successfully.
@retval other Some error occurs when executing this entry point.
**/
EFI_STATUS
EFIAPI
InitializeSataControllerDriver (
IN EFI_HANDLE ImageHandle,
IN EFI_SYSTEM_TABLE *SystemTable
)
{
EFI_STATUS Status;
//
// Install driver model protocol(s).
//
Status = EfiLibInstallDriverBindingComponentName2 (
ImageHandle,
SystemTable,
&gSataControllerDriverBinding,
ImageHandle,
&gSataControllerComponentName,
&gSataControllerComponentName2
);
ASSERT_EFI_ERROR (Status);
return Status;
}
/**
Supported function of Driver Binding protocol for this driver.
Test to see if this driver supports ControllerHandle.
@param This Protocol instance pointer.
@param Controller Handle of device to test.
@param RemainingDevicePath A pointer to the device path.
it should be ignored by device driver.
@retval EFI_SUCCESS This driver supports this device.
@retval EFI_ALREADY_STARTED This driver is already running on this device.
@retval other This driver does not support this device.
**/
EFI_STATUS
EFIAPI
SataControllerSupported (
IN EFI_DRIVER_BINDING_PROTOCOL *This,
IN EFI_HANDLE Controller,
IN EFI_DEVICE_PATH_PROTOCOL *RemainingDevicePath
)
{
EFI_STATUS Status;
EFI_PCI_IO_PROTOCOL *PciIo;
PCI_TYPE00 PciData;
//
// Attempt to open PCI I/O Protocol
//
Status = gBS->OpenProtocol (
Controller,
&gEfiPciIoProtocolGuid,
(VOID **) &PciIo,
This->DriverBindingHandle,
Controller,
EFI_OPEN_PROTOCOL_GET_PROTOCOL
);
if (EFI_ERROR (Status)) {
return Status;
}
//
// Now further check the PCI header: Base Class (offset 0x0B) and
// Sub Class (offset 0x0A). This controller should be an SATA controller
//
Status = PciIo->Pci.Read (
PciIo,
EfiPciIoWidthUint8,
PCI_CLASSCODE_OFFSET,
sizeof (PciData.Hdr.ClassCode),
PciData.Hdr.ClassCode
);
if (EFI_ERROR (Status)) {
return EFI_UNSUPPORTED;
}
if (IS_PCI_IDE (&PciData) || IS_PCI_SATADPA (&PciData)) {
return EFI_SUCCESS;
}
return EFI_UNSUPPORTED;
}
/**
This routine is called right after the .Supported() called and
Start this driver on ControllerHandle.
@param This Protocol instance pointer.
@param Controller Handle of device to bind driver to.
@param RemainingDevicePath A pointer to the device path.
it should be ignored by device driver.
@retval EFI_SUCCESS This driver is added to this device.
@retval EFI_ALREADY_STARTED This driver is already running on this device.
@retval other Some error occurs when binding this driver to this device.
**/
EFI_STATUS
EFIAPI
SataControllerStart (
IN EFI_DRIVER_BINDING_PROTOCOL *This,
IN EFI_HANDLE Controller,
IN EFI_DEVICE_PATH_PROTOCOL *RemainingDevicePath
)
{
UINTN BailLogMask;
EFI_STATUS Status;
EFI_PCI_IO_PROTOCOL *PciIo;
UINT64 OriginalPciAttributes;
PCI_TYPE00 PciData;
EFI_SATA_CONTROLLER_PRIVATE_DATA *SataPrivateData;
UINT32 Data32;
UINTN ChannelDeviceCount;
DEBUG ((DEBUG_INFO, "SataControllerStart START\n"));
BailLogMask = DEBUG_ERROR;
SataPrivateData = NULL;
//
// Now test and open PCI I/O Protocol
//
Status = gBS->OpenProtocol (
Controller,
&gEfiPciIoProtocolGuid,
(VOID **) &PciIo,
This->DriverBindingHandle,
Controller,
EFI_OPEN_PROTOCOL_BY_DRIVER
);
if (EFI_ERROR (Status)) {
if (Status == EFI_ALREADY_STARTED) {
//
// This is an expected condition for OpenProtocol() / BY_DRIVER, in a
// DriverBindingStart() member function; degrade the log mask to
// DEBUG_INFO.
//
BailLogMask = DEBUG_INFO;
}
goto Bail;
}
//
// Save original PCI attributes, and enable IO space access, memory space
// access, and Bus Master (DMA).
//
Status = PciIo->Attributes (PciIo, EfiPciIoAttributeOperationGet, 0,
&OriginalPciAttributes);
if (EFI_ERROR (Status)) {
goto ClosePciIo;
}
Status = PciIo->Attributes (PciIo, EfiPciIoAttributeOperationEnable,
EFI_PCI_DEVICE_ENABLE, NULL);
if (EFI_ERROR (Status)) {
goto ClosePciIo;
}
//
// Allocate Sata Private Data structure
//
SataPrivateData = AllocateZeroPool (sizeof (EFI_SATA_CONTROLLER_PRIVATE_DATA));
if (SataPrivateData == NULL) {
Status = EFI_OUT_OF_RESOURCES;
goto RestorePciAttributes;
}
//
// Initialize Sata Private Data
//
SataPrivateData->Signature = SATA_CONTROLLER_SIGNATURE;
SataPrivateData->PciIo = PciIo;
SataPrivateData->OriginalPciAttributes = OriginalPciAttributes;
SataPrivateData->IdeInit.GetChannelInfo = IdeInitGetChannelInfo;
SataPrivateData->IdeInit.NotifyPhase = IdeInitNotifyPhase;
SataPrivateData->IdeInit.SubmitData = IdeInitSubmitData;
SataPrivateData->IdeInit.DisqualifyMode = IdeInitDisqualifyMode;
SataPrivateData->IdeInit.CalculateMode = IdeInitCalculateMode;
SataPrivateData->IdeInit.SetTiming = IdeInitSetTiming;
SataPrivateData->IdeInit.EnumAll = SATA_ENUMER_ALL;
Status = PciIo->Pci.Read (
PciIo,
EfiPciIoWidthUint8,
PCI_CLASSCODE_OFFSET,
sizeof (PciData.Hdr.ClassCode),
PciData.Hdr.ClassCode
);
if (EFI_ERROR (Status)) {
goto FreeSataPrivateData;
}
if (IS_PCI_IDE (&PciData)) {
SataPrivateData->IdeInit.ChannelCount = IDE_MAX_CHANNEL;
SataPrivateData->DeviceCount = IDE_MAX_DEVICES;
} else if (IS_PCI_SATADPA (&PciData)) {
//
// Read Host Capability Register(CAP) to get Number of Ports(NPS) and Supports Port Multiplier(SPM)
// NPS is 0's based value indicating the maximum number of ports supported by the HBA silicon.
// A maximum of 32 ports can be supported. A value of '0h', indicating one port, is the minimum requirement.
//
Data32 = AhciReadReg (PciIo, R_AHCI_CAP);
SataPrivateData->IdeInit.ChannelCount = (UINT8) ((Data32 & B_AHCI_CAP_NPS) + 1);
SataPrivateData->DeviceCount = AHCI_MAX_DEVICES;
if ((Data32 & B_AHCI_CAP_SPM) == B_AHCI_CAP_SPM) {
SataPrivateData->DeviceCount = AHCI_MULTI_MAX_DEVICES;
}
}
ChannelDeviceCount = (UINTN) (SataPrivateData->IdeInit.ChannelCount) * (UINTN) (SataPrivateData->DeviceCount);
SataPrivateData->DisqualifiedModes = AllocateZeroPool ((sizeof (EFI_ATA_COLLECTIVE_MODE)) * ChannelDeviceCount);
if (SataPrivateData->DisqualifiedModes == NULL) {
Status = EFI_OUT_OF_RESOURCES;
goto FreeSataPrivateData;
}
SataPrivateData->IdentifyData = AllocateZeroPool ((sizeof (EFI_IDENTIFY_DATA)) * ChannelDeviceCount);
if (SataPrivateData->IdentifyData == NULL) {
Status = EFI_OUT_OF_RESOURCES;
goto FreeDisqualifiedModes;
}
SataPrivateData->IdentifyValid = AllocateZeroPool ((sizeof (BOOLEAN)) * ChannelDeviceCount);
if (SataPrivateData->IdentifyValid == NULL) {
Status = EFI_OUT_OF_RESOURCES;
goto FreeIdentifyData;
}
//
// Install IDE Controller Init Protocol to this instance
//
Status = gBS->InstallMultipleProtocolInterfaces (
&Controller,
&gEfiIdeControllerInitProtocolGuid,
&(SataPrivateData->IdeInit),
NULL
);
if (EFI_ERROR (Status)) {
goto FreeIdentifyValid;
}
DEBUG ((DEBUG_INFO, "SataControllerStart END status = %r\n", Status));
return Status;
FreeIdentifyValid:
FreePool (SataPrivateData->IdentifyValid);
FreeIdentifyData:
FreePool (SataPrivateData->IdentifyData);
FreeDisqualifiedModes:
FreePool (SataPrivateData->DisqualifiedModes);
FreeSataPrivateData:
FreePool (SataPrivateData);
RestorePciAttributes:
PciIo->Attributes (PciIo, EfiPciIoAttributeOperationSet,
OriginalPciAttributes, NULL);
ClosePciIo:
gBS->CloseProtocol (
Controller,
&gEfiPciIoProtocolGuid,
This->DriverBindingHandle,
Controller
);
Bail:
DEBUG ((BailLogMask, "SataControllerStart error return status = %r\n",
Status));
return Status;
}
/**
Stop this driver on ControllerHandle.
@param This Protocol instance pointer.
@param Controller Handle of device to stop driver on.
@param NumberOfChildren Not used.
@param ChildHandleBuffer Not used.
@retval EFI_SUCCESS This driver is removed from this device.
@retval other Some error occurs when removing this driver from this device.
**/
EFI_STATUS
EFIAPI
SataControllerStop (
IN EFI_DRIVER_BINDING_PROTOCOL *This,
IN EFI_HANDLE Controller,
IN UINTN NumberOfChildren,
IN EFI_HANDLE *ChildHandleBuffer
)
{
EFI_STATUS Status;
EFI_IDE_CONTROLLER_INIT_PROTOCOL *IdeInit;
EFI_SATA_CONTROLLER_PRIVATE_DATA *SataPrivateData;
EFI_PCI_IO_PROTOCOL *PciIo;
UINT64 OriginalPciAttributes;
//
// Open the produced protocol
//
Status = gBS->OpenProtocol (
Controller,
&gEfiIdeControllerInitProtocolGuid,
(VOID **) &IdeInit,
This->DriverBindingHandle,
Controller,
EFI_OPEN_PROTOCOL_GET_PROTOCOL
);
if (EFI_ERROR (Status)) {
return EFI_UNSUPPORTED;
}
SataPrivateData = SATA_CONTROLLER_PRIVATE_DATA_FROM_THIS (IdeInit);
ASSERT (SataPrivateData != NULL);
PciIo = SataPrivateData->PciIo;
OriginalPciAttributes = SataPrivateData->OriginalPciAttributes;
//
// Uninstall the IDE Controller Init Protocol from this instance
//
Status = gBS->UninstallMultipleProtocolInterfaces (
Controller,
&gEfiIdeControllerInitProtocolGuid,
&(SataPrivateData->IdeInit),
NULL
);
if (EFI_ERROR (Status)) {
return Status;
}
if (SataPrivateData->DisqualifiedModes != NULL) {
FreePool (SataPrivateData->DisqualifiedModes);
}
if (SataPrivateData->IdentifyData != NULL) {
FreePool (SataPrivateData->IdentifyData);
}
if (SataPrivateData->IdentifyValid != NULL) {
FreePool (SataPrivateData->IdentifyValid);
}
FreePool (SataPrivateData);
//
// Restore original PCI attributes
//
PciIo->Attributes (
PciIo,
EfiPciIoAttributeOperationSet,
OriginalPciAttributes,
NULL
);
//
// Close protocols opened by Sata Controller driver
//
return gBS->CloseProtocol (
Controller,
&gEfiPciIoProtocolGuid,
This->DriverBindingHandle,
Controller
);
}
/**
Calculate the flat array subscript of a (Channel, Device) pair.
@param[in] SataPrivateData The private data structure corresponding to the
SATA controller that attaches the device for
which the flat array subscript is being
calculated.
@param[in] Channel The channel (ie. port) number on the SATA
controller that the device is attached to.
@param[in] Device The device number on the channel.
@return The flat array subscript suitable for indexing DisqualifiedModes,
IdentifyData, and IdentifyValid.
**/
STATIC
UINTN
FlatDeviceIndex (
IN CONST EFI_SATA_CONTROLLER_PRIVATE_DATA *SataPrivateData,
IN UINTN Channel,
IN UINTN Device
)
{
ASSERT (SataPrivateData != NULL);
ASSERT (Channel < SataPrivateData->IdeInit.ChannelCount);
ASSERT (Device < SataPrivateData->DeviceCount);
return Channel * SataPrivateData->DeviceCount + Device;
}
//
// Interface functions of IDE_CONTROLLER_INIT protocol
//
/**
Returns the information about the specified IDE channel.
This function can be used to obtain information about a particular IDE channel.
The driver entity uses this information during the enumeration process.
If Enabled is set to FALSE, the driver entity will not scan the channel. Note
that it will not prevent an operating system driver from scanning the channel.
For most of today's controllers, MaxDevices will either be 1 or 2. For SATA
controllers, this value will always be 1. SATA configurations can contain SATA
port multipliers. SATA port multipliers behave like SATA bridges and can support
up to 16 devices on the other side. If a SATA port out of the IDE controller
is connected to a port multiplier, MaxDevices will be set to the number of SATA
devices that the port multiplier supports. Because today's port multipliers
support up to fifteen SATA devices, this number can be as large as fifteen. The IDE
bus driver is required to scan for the presence of port multipliers behind an SATA
controller and enumerate up to MaxDevices number of devices behind the port
multiplier.
In this context, the devices behind a port multiplier constitute a channel.
@param[in] This The pointer to the EFI_IDE_CONTROLLER_INIT_PROTOCOL instance.
@param[in] Channel Zero-based channel number.
@param[out] Enabled TRUE if this channel is enabled. Disabled channels
are not scanned to see if any devices are present.
@param[out] MaxDevices The maximum number of IDE devices that the bus driver
can expect on this channel. For the ATA/ATAPI
specification, version 6, this number will either be
one or two. For Serial ATA (SATA) configurations with a
port multiplier, this number can be as large as fifteen.
@retval EFI_SUCCESS Information was returned without any errors.
@retval EFI_INVALID_PARAMETER Channel is invalid (Channel >= ChannelCount).
**/
EFI_STATUS
EFIAPI
IdeInitGetChannelInfo (
IN EFI_IDE_CONTROLLER_INIT_PROTOCOL *This,
IN UINT8 Channel,
OUT BOOLEAN *Enabled,
OUT UINT8 *MaxDevices
)
{
EFI_SATA_CONTROLLER_PRIVATE_DATA *SataPrivateData;
SataPrivateData = SATA_CONTROLLER_PRIVATE_DATA_FROM_THIS (This);
ASSERT (SataPrivateData != NULL);
if (Channel < This->ChannelCount) {
*Enabled = TRUE;
*MaxDevices = SataPrivateData->DeviceCount;
return EFI_SUCCESS;
}
*Enabled = FALSE;
return EFI_INVALID_PARAMETER;
}
/**
The notifications from the driver entity that it is about to enter a certain
phase of the IDE channel enumeration process.
This function can be used to notify the IDE controller driver to perform
specific actions, including any chipset-specific initialization, so that the
chipset is ready to enter the next phase. Seven notification points are defined
at this time.
More synchronization points may be added as required in the future.
@param[in] This The pointer to the EFI_IDE_CONTROLLER_INIT_PROTOCOL instance.
@param[in] Phase The phase during enumeration.
@param[in] Channel Zero-based channel number.
@retval EFI_SUCCESS The notification was accepted without any errors.
@retval EFI_UNSUPPORTED Phase is not supported.
@retval EFI_INVALID_PARAMETER Channel is invalid (Channel >= ChannelCount).
@retval EFI_NOT_READY This phase cannot be entered at this time; for
example, an attempt was made to enter a Phase
without having entered one or more previous
Phase.
**/
EFI_STATUS
EFIAPI
IdeInitNotifyPhase (
IN EFI_IDE_CONTROLLER_INIT_PROTOCOL *This,
IN EFI_IDE_CONTROLLER_ENUM_PHASE Phase,
IN UINT8 Channel
)
{
return EFI_SUCCESS;
}
/**
Submits the device information to the IDE controller driver.
This function is used by the driver entity to pass detailed information about
a particular device to the IDE controller driver. The driver entity obtains
this information by issuing an ATA or ATAPI IDENTIFY_DEVICE command. IdentifyData
is the pointer to the response data buffer. The IdentifyData buffer is owned
by the driver entity, and the IDE controller driver must make a local copy
of the entire buffer or parts of the buffer as needed. The original IdentifyData
buffer pointer may not be valid when
- EFI_IDE_CONTROLLER_INIT_PROTOCOL.CalculateMode() or
- EFI_IDE_CONTROLLER_INIT_PROTOCOL.DisqualifyMode() is called at a later point.
The IDE controller driver may consult various fields of EFI_IDENTIFY_DATA to
compute the optimum mode for the device. These fields are not limited to the
timing information. For example, an implementation of the IDE controller driver
may examine the vendor and type/mode field to match known bad drives.
The driver entity may submit drive information in any order, as long as it
submits information for all the devices belonging to the enumeration group
before EFI_IDE_CONTROLLER_INIT_PROTOCOL.CalculateMode() is called for any device
in that enumeration group. If a device is absent, EFI_IDE_CONTROLLER_INIT_PROTOCOL.SubmitData()
should be called with IdentifyData set to NULL. The IDE controller driver may
not have any other mechanism to know whether a device is present or not. Therefore,
setting IdentifyData to NULL does not constitute an error condition.
EFI_IDE_CONTROLLER_INIT_PROTOCOL.SubmitData() can be called only once for a
given (Channel, Device) pair.
@param[in] This A pointer to the EFI_IDE_CONTROLLER_INIT_PROTOCOL instance.
@param[in] Channel Zero-based channel number.
@param[in] Device Zero-based device number on the Channel.
@param[in] IdentifyData The device's response to the ATA IDENTIFY_DEVICE command.
@retval EFI_SUCCESS The information was accepted without any errors.
@retval EFI_INVALID_PARAMETER Channel is invalid (Channel >= ChannelCount).
@retval EFI_INVALID_PARAMETER Device is invalid.
**/
EFI_STATUS
EFIAPI
IdeInitSubmitData (
IN EFI_IDE_CONTROLLER_INIT_PROTOCOL *This,
IN UINT8 Channel,
IN UINT8 Device,
IN EFI_IDENTIFY_DATA *IdentifyData
)
{
EFI_SATA_CONTROLLER_PRIVATE_DATA *SataPrivateData;
UINTN DeviceIndex;
SataPrivateData = SATA_CONTROLLER_PRIVATE_DATA_FROM_THIS (This);
ASSERT (SataPrivateData != NULL);
if ((Channel >= This->ChannelCount) || (Device >= SataPrivateData->DeviceCount)) {
return EFI_INVALID_PARAMETER;
}
DeviceIndex = FlatDeviceIndex (SataPrivateData, Channel, Device);
//
// Make a local copy of device's IdentifyData and mark the valid flag
//
if (IdentifyData != NULL) {
CopyMem (
&(SataPrivateData->IdentifyData[DeviceIndex]),
IdentifyData,
sizeof (EFI_IDENTIFY_DATA)
);
SataPrivateData->IdentifyValid[DeviceIndex] = TRUE;
} else {
SataPrivateData->IdentifyValid[DeviceIndex] = FALSE;
}
return EFI_SUCCESS;
}
/**
Disqualifies specific modes for an IDE device.
This function allows the driver entity or other drivers (such as platform
drivers) to reject certain timing modes and request the IDE controller driver
to recalculate modes. This function allows the driver entity and the IDE
controller driver to negotiate the timings on a per-device basis. This function
is useful in the case of drives that lie about their capabilities. An example
is when the IDE device fails to accept the timing modes that are calculated
by the IDE controller driver based on the response to the Identify Drive command.
If the driver entity does not want to limit the ATA timing modes and leave that
decision to the IDE controller driver, it can either not call this function for
the given device or call this function and set the Valid flag to FALSE for all
modes that are listed in EFI_ATA_COLLECTIVE_MODE.
The driver entity may disqualify modes for a device in any order and any number
of times.
This function can be called multiple times to invalidate multiple modes of the
same type (e.g., Programmed Input/Output [PIO] modes 3 and 4). See the ATA/ATAPI
specification for more information on PIO modes.
For Serial ATA (SATA) controllers, this member function can be used to disqualify
a higher transfer rate mode on a given channel. For example, a platform driver
may inform the IDE controller driver to not use second-generation (Gen2) speeds
for a certain SATA drive.
@param[in] This The pointer to the EFI_IDE_CONTROLLER_INIT_PROTOCOL instance.
@param[in] Channel The zero-based channel number.
@param[in] Device The zero-based device number on the Channel.
@param[in] BadModes The modes that the device does not support and that
should be disqualified.
@retval EFI_SUCCESS The modes were accepted without any errors.
@retval EFI_INVALID_PARAMETER Channel is invalid (Channel >= ChannelCount).
@retval EFI_INVALID_PARAMETER Device is invalid.
@retval EFI_INVALID_PARAMETER IdentifyData is NULL.
**/
EFI_STATUS
EFIAPI
IdeInitDisqualifyMode (
IN EFI_IDE_CONTROLLER_INIT_PROTOCOL *This,
IN UINT8 Channel,
IN UINT8 Device,
IN EFI_ATA_COLLECTIVE_MODE *BadModes
)
{
EFI_SATA_CONTROLLER_PRIVATE_DATA *SataPrivateData;
UINTN DeviceIndex;
SataPrivateData = SATA_CONTROLLER_PRIVATE_DATA_FROM_THIS (This);
ASSERT (SataPrivateData != NULL);
if ((Channel >= This->ChannelCount) || (BadModes == NULL) || (Device >= SataPrivateData->DeviceCount)) {
return EFI_INVALID_PARAMETER;
}
DeviceIndex = FlatDeviceIndex (SataPrivateData, Channel, Device);
//
// Record the disqualified modes per channel per device. From ATA/ATAPI spec,
// if a mode is not supported, the modes higher than it is also not supported.
//
CopyMem (
&(SataPrivateData->DisqualifiedModes[DeviceIndex]),
BadModes,
sizeof (EFI_ATA_COLLECTIVE_MODE)
);
return EFI_SUCCESS;
}
/**
Returns the information about the optimum modes for the specified IDE device.
This function is used by the driver entity to obtain the optimum ATA modes for
a specific device. The IDE controller driver takes into account the following
while calculating the mode:
- The IdentifyData inputs to EFI_IDE_CONTROLLER_INIT_PROTOCOL.SubmitData()
- The BadModes inputs to EFI_IDE_CONTROLLER_INIT_PROTOCOL.DisqualifyMode()
The driver entity is required to call EFI_IDE_CONTROLLER_INIT_PROTOCOL.SubmitData()
for all the devices that belong to an enumeration group before calling
EFI_IDE_CONTROLLER_INIT_PROTOCOL.CalculateMode() for any device in the same group.
The IDE controller driver will use controller- and possibly platform-specific
algorithms to arrive at SupportedModes. The IDE controller may base its
decision on user preferences and other considerations as well. This function
may be called multiple times because the driver entity may renegotiate the mode
with the IDE controller driver using EFI_IDE_CONTROLLER_INIT_PROTOCOL.DisqualifyMode().
The driver entity may collect timing information for various devices in any
order. The driver entity is responsible for making sure that all the dependencies
are satisfied. For example, the SupportedModes information for device A that
was previously returned may become stale after a call to
EFI_IDE_CONTROLLER_INIT_PROTOCOL.DisqualifyMode() for device B.
The buffer SupportedModes is allocated by the callee because the caller does
not necessarily know the size of the buffer. The type EFI_ATA_COLLECTIVE_MODE
is defined in a way that allows for future extensibility and can be of variable
length. This memory pool should be deallocated by the caller when it is no
longer necessary.
The IDE controller driver for a Serial ATA (SATA) controller can use this
member function to force a lower speed (first-generation [Gen1] speeds on a
second-generation [Gen2]-capable hardware). The IDE controller driver can
also allow the driver entity to stay with the speed that has been negotiated
by the physical layer.
@param[in] This The pointer to the EFI_IDE_CONTROLLER_INIT_PROTOCOL instance.
@param[in] Channel A zero-based channel number.
@param[in] Device A zero-based device number on the Channel.
@param[out] SupportedModes The optimum modes for the device.
@retval EFI_SUCCESS SupportedModes was returned.
@retval EFI_INVALID_PARAMETER Channel is invalid (Channel >= ChannelCount).
@retval EFI_INVALID_PARAMETER Device is invalid.
@retval EFI_INVALID_PARAMETER SupportedModes is NULL.
@retval EFI_NOT_READY Modes cannot be calculated due to a lack of
data. This error may happen if
EFI_IDE_CONTROLLER_INIT_PROTOCOL.SubmitData()
and EFI_IDE_CONTROLLER_INIT_PROTOCOL.DisqualifyData()
were not called for at least one drive in the
same enumeration group.
**/
EFI_STATUS
EFIAPI
IdeInitCalculateMode (
IN EFI_IDE_CONTROLLER_INIT_PROTOCOL *This,
IN UINT8 Channel,
IN UINT8 Device,
OUT EFI_ATA_COLLECTIVE_MODE **SupportedModes
)
{
EFI_SATA_CONTROLLER_PRIVATE_DATA *SataPrivateData;
EFI_IDENTIFY_DATA *IdentifyData;
BOOLEAN IdentifyValid;
EFI_ATA_COLLECTIVE_MODE *DisqualifiedModes;
UINT16 SelectedMode;
EFI_STATUS Status;
UINTN DeviceIndex;
SataPrivateData = SATA_CONTROLLER_PRIVATE_DATA_FROM_THIS (This);
ASSERT (SataPrivateData != NULL);
if ((Channel >= This->ChannelCount) || (SupportedModes == NULL) || (Device >= SataPrivateData->DeviceCount)) {
return EFI_INVALID_PARAMETER;
}
*SupportedModes = AllocateZeroPool (sizeof (EFI_ATA_COLLECTIVE_MODE));
if (*SupportedModes == NULL) {
ASSERT (*SupportedModes != NULL);
return EFI_OUT_OF_RESOURCES;
}
DeviceIndex = FlatDeviceIndex (SataPrivateData, Channel, Device);
IdentifyData = &(SataPrivateData->IdentifyData[DeviceIndex]);
IdentifyValid = SataPrivateData->IdentifyValid[DeviceIndex];
DisqualifiedModes = &(SataPrivateData->DisqualifiedModes[DeviceIndex]);
//
// Make sure we've got the valid identify data of the device from SubmitData()
//
if (!IdentifyValid) {
FreePool (*SupportedModes);
return EFI_NOT_READY;
}
Status = CalculateBestPioMode (
IdentifyData,
(DisqualifiedModes->PioMode.Valid ? ((UINT16 *) &(DisqualifiedModes->PioMode.Mode)) : NULL),
&SelectedMode
);
if (!EFI_ERROR (Status)) {
(*SupportedModes)->PioMode.Valid = TRUE;
(*SupportedModes)->PioMode.Mode = SelectedMode;
} else {
(*SupportedModes)->PioMode.Valid = FALSE;
}
DEBUG ((DEBUG_INFO, "IdeInitCalculateMode: PioMode = %x\n", (*SupportedModes)->PioMode.Mode));
Status = CalculateBestUdmaMode (
IdentifyData,
(DisqualifiedModes->UdmaMode.Valid ? ((UINT16 *) &(DisqualifiedModes->UdmaMode.Mode)) : NULL),
&SelectedMode
);
if (!EFI_ERROR (Status)) {
(*SupportedModes)->UdmaMode.Valid = TRUE;
(*SupportedModes)->UdmaMode.Mode = SelectedMode;
} else {
(*SupportedModes)->UdmaMode.Valid = FALSE;
}
DEBUG ((DEBUG_INFO, "IdeInitCalculateMode: UdmaMode = %x\n", (*SupportedModes)->UdmaMode.Mode));
//
// The modes other than PIO and UDMA are not supported
//
return EFI_SUCCESS;
}
/**
Commands the IDE controller driver to program the IDE controller hardware
so that the specified device can operate at the specified mode.
This function is used by the driver entity to instruct the IDE controller
driver to program the IDE controller hardware to the specified modes. This
function can be called only once for a particular device. For a Serial ATA
(SATA) Advanced Host Controller Interface (AHCI) controller, no controller-
specific programming may be required.
@param[in] This Pointer to the EFI_IDE_CONTROLLER_INIT_PROTOCOL instance.
@param[in] Channel Zero-based channel number.
@param[in] Device Zero-based device number on the Channel.
@param[in] Modes The modes to set.
@retval EFI_SUCCESS The command was accepted without any errors.
@retval EFI_INVALID_PARAMETER Channel is invalid (Channel >= ChannelCount).
@retval EFI_INVALID_PARAMETER Device is invalid.
@retval EFI_NOT_READY Modes cannot be set at this time due to lack of data.
@retval EFI_DEVICE_ERROR Modes cannot be set due to hardware failure.
The driver entity should not use this device.
**/
EFI_STATUS
EFIAPI
IdeInitSetTiming (
IN EFI_IDE_CONTROLLER_INIT_PROTOCOL *This,
IN UINT8 Channel,
IN UINT8 Device,
IN EFI_ATA_COLLECTIVE_MODE *Modes
)
{
return EFI_SUCCESS;
}
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