/** @file
This file declares EFI IDE Controller Init Protocol
The EFI_IDE_CONTROLLER_INIT_PROTOCOL provides the chipset-specific information
to the driver entity. This protocol is mandatory for IDE controllers if the
IDE devices behind the controller are to be enumerated by a driver entity.
There can only be one instance of EFI_IDE_CONTROLLER_INIT_PROTOCOL for each IDE
controller in a system. It is installed on the handle that corresponds to the
IDE controller. A driver entity that wishes to manage an IDE bus and possibly
IDE devices in a system will have to retrieve the EFI_IDE_CONTROLLER_INIT_PROTOCOL
instance that is associated with the controller to be managed.
A device handle for an IDE controller must contain an EFI_DEVICE_PATH_PROTOCOL.
Copyright (c) 2007 - 2011, 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 that 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.
@par Revision Reference:
This Protocol is defined in UEFI Platform Initialization Specification 1.2
Volume 5: Standards.
**/
#ifndef _EFI_IDE_CONTROLLER_INIT_PROTOCOL_H_
#define _EFI_IDE_CONTROLLER_INIT_PROTOCOL_H_
#include <IndustryStandard/Atapi.h>
///
/// Global ID for the EFI_IDE_CONTROLLER_INIT_PROTOCOL.
///
#define EFI_IDE_CONTROLLER_INIT_PROTOCOL_GUID \
{ \
0xa1e37052, 0x80d9, 0x4e65, {0xa3, 0x17, 0x3e, 0x9a, 0x55, 0xc4, 0x3e, 0xc9 } \
}
///
/// Forward declaration for EFI_IDE_CONTROLLER_INIT_PROTOCOL.
///
typedef struct _EFI_IDE_CONTROLLER_INIT_PROTOCOL EFI_IDE_CONTROLLER_INIT_PROTOCOL;
///
/// The phase of the IDE Controller enumeration.
///
typedef enum {
///
/// The driver entity is about to begin enumerating the devices
/// behind the specified channel. This notification can be used to
/// perform any chipset-specific programming.
///
EfiIdeBeforeChannelEnumeration,
///
/// The driver entity has completed enumerating the devices
/// behind the specified channel. This notification can be used to
/// perform any chipset-specific programming.
///
EfiIdeAfterChannelEnumeration,
///
/// The driver entity is about to reset the devices behind the
/// specified channel. This notification can be used to perform any
/// chipset-specific programming.
///
EfiIdeBeforeChannelReset,
///
/// The driver entity has completed resetting the devices behind
/// the specified channel. This notification can be used to perform
/// any chipset-specific programming.
///
EfiIdeAfterChannelReset,
///
/// The driver entity is about to detect the presence of devices
/// behind the specified channel. This notification can be used to
/// set up the bus signals to default levels or for implementing
/// predelays.
///
EfiIdeBusBeforeDevicePresenceDetection,
///
/// The driver entity is done with detecting the presence of
/// devices behind the specified channel. This notification can be
/// used to perform any chipset-specific programming.
///
EfiIdeBusAfterDevicePresenceDetection,
///
/// The IDE bus is requesting the IDE controller driver to
/// reprogram the IDE controller hardware and thereby reset all
/// the mode and timing settings to default settings.
///
EfiIdeResetMode,
EfiIdeBusPhaseMaximum
} EFI_IDE_CONTROLLER_ENUM_PHASE;
///
/// This extended mode describes the SATA physical protocol.
/// SATA physical layers can operate at different speeds.
/// These speeds are defined below. Various PATA protocols
/// and associated modes are not applicable to SATA devices.
///
typedef enum {
EfiAtaSataTransferProtocol
} EFI_ATA_EXT_TRANSFER_PROTOCOL;
///
/// Automatically detects the optimum SATA speed.
///
#define EFI_SATA_AUTO_SPEED 0
///
/// Indicates a first-generation (Gen1) SATA speed.
///
#define EFI_SATA_GEN1_SPEED 1
///
/// Indicates a second-generation (Gen2) SATA speed.
///
#define EFI_SATA_GEN2_SPEED 2
///
/// EFI_ATA_MODE structure.
///
typedef struct {
BOOLEAN Valid; ///< TRUE if Mode is valid.
UINT32 Mode; ///< The actual ATA mode. This field is not a bit map.
} EFI_ATA_MODE;
///
/// EFI_ATA_EXTENDED_MODE structure
///
typedef struct {
///
/// An enumeration defining various transfer protocols other than the protocols
/// that exist at the time this specification was developed (i.e., PIO, single
/// word DMA, multiword DMA, and UDMA). Each transfer protocol is associated
/// with a mode. The various transfer protocols are defined by the ATA/ATAPI
/// specification. This enumeration makes the interface extensible because we
/// can support new transport protocols beyond UDMA. Type EFI_ATA_EXT_TRANSFER_PROTOCOL
/// is defined below.
///
EFI_ATA_EXT_TRANSFER_PROTOCOL TransferProtocol;
///
/// The mode for operating the transfer protocol that is identified by TransferProtocol.
///
UINT32 Mode;
} EFI_ATA_EXTENDED_MODE;
///
/// EFI_ATA_COLLECTIVE_MODE structure.
///
typedef struct {
///
/// This field specifies the PIO mode. PIO modes are defined in the ATA/ATAPI
/// specification. The ATA/ATAPI specification defines the enumeration. In
/// other words, a value of 1 in this field means PIO mode 1. The actual meaning
/// of PIO mode 1 is governed by the ATA/ATAPI specification. Type EFI_ATA_MODE
/// is defined below.
///
EFI_ATA_MODE PioMode;
///
/// This field specifies the single word DMA mode. Single word DMA modes are defined
/// in the ATA/ATAPI specification, versions 1 and 2. Single word DMA support was
/// obsoleted in the ATA/ATAPI specification, version 3. Therefore, most devices and
/// controllers will not support this transfer mode. The ATA/ATAPI specification defines
/// the enumeration. In other words, a value of 1 in this field means single word DMA
/// mode 1. The actual meaning of single word DMA mode 1 is governed by the ATA/
/// ATAPI specification.
///
EFI_ATA_MODE SingleWordDmaMode;
///
/// This field specifies the multiword DMA mode. Various multiword DMA modes are
/// defined in the ATA/ATAPI specification. A value of 1 in this field means multiword
/// DMA mode 1. The actual meaning of multiword DMA mode 1 is governed by the
/// ATA/ATAPI specification.
///
EFI_ATA_MODE MultiWordDmaMode;
///
/// This field specifies the ultra DMA (UDMA) mode. UDMA modes are defined in the
/// ATA/ATAPI specification. A value of 1 in this field means UDMA mode 1. The
/// actual meaning of UDMA mode 1 is governed by the ATA/ATAPI specification.
///
EFI_ATA_MODE UdmaMode;
///
/// The number of extended-mode bitmap entries. Extended modes describe transfer
/// protocols beyond PIO, single word DMA, multiword DMA, and UDMA. This field
/// can be zero and provides extensibility.
///
UINT32 ExtModeCount;
///
/// ExtModeCount number of entries. Each entry represents a transfer protocol other
/// than the ones defined above (i.e., PIO, single word DMA, multiword DMA, and
/// UDMA). This field is defined for extensibility. At this time, only one extended
/// transfer protocol is defined to cover SATA transfers. Type
/// EFI_ATA_EXTENDED_MODE is defined below.
///
EFI_ATA_EXTENDED_MODE ExtMode[1];
} EFI_ATA_COLLECTIVE_MODE;
///
/// EFI_ATA_IDENTIFY_DATA & EFI_ATAPI_IDENTIFY_DATA structure
///
/// The definition of these two structures is not part of the protocol
/// definition because the ATA/ATAPI Specification controls the definition
/// of all the fields. The ATA/ATAPI Specification can obsolete old fields
/// or redefine existing fields.
typedef ATA_IDENTIFY_DATA EFI_ATA_IDENTIFY_DATA;
typedef ATAPI_IDENTIFY_DATA EFI_ATAPI_IDENTIFY_DATA;
///
/// This flag indicates whether the IDENTIFY data is a response from an ATA device
/// (EFI_ATA_IDENTIFY_DATA) or response from an ATAPI device
/// (EFI_ATAPI_IDENTIFY_DATA). According to the ATA/ATAPI specification,
/// EFI_IDENTIFY_DATA is for an ATA device if bit 15 of the Config field is zero.
/// The Config field is common to both EFI_ATA_IDENTIFY_DATA and
/// EFI_ATAPI_IDENTIFY_DATA.
///
#define EFI_ATAPI_DEVICE_IDENTIFY_DATA 0x8000
///
/// EFI_IDENTIFY_DATA structure.
///
typedef union {
///
/// The data that is returned by an ATA device upon successful completion
/// of the ATA IDENTIFY_DEVICE command.
///
EFI_ATA_IDENTIFY_DATA AtaData;
///
/// The data that is returned by an ATAPI device upon successful completion
/// of the ATA IDENTIFY_PACKET_DEVICE command.
///
EFI_ATAPI_IDENTIFY_DATA AtapiData;
} EFI_IDENTIFY_DATA;
/**
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).
**/
typedef
EFI_STATUS
(EFIAPI *EFI_IDE_CONTROLLER_GET_CHANNEL_INFO)(
IN EFI_IDE_CONTROLLER_INIT_PROTOCOL *This,
IN UINT8 Channel,
OUT BOOLEAN *Enabled,
OUT UINT8 *MaxDevices
);
/**
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.
**/
typedef
EFI_STATUS
(EFIAPI *EFI_IDE_CONTROLLER_NOTIFY_PHASE)(
IN EFI_IDE_CONTROLLER_INIT_PROTOCOL *This,
IN EFI_IDE_CONTROLLER_ENUM_PHASE Phase,
IN UINT8 Channel
);
/**
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.
**/
typedef
EFI_STATUS
(EFIAPI *EFI_IDE_CONTROLLER_SUBMIT_DATA)(
IN EFI_IDE_CONTROLLER_INIT_PROTOCOL *This,
IN UINT8 Channel,
IN UINT8 Device,
IN EFI_IDENTIFY_DATA *IdentifyData
);
/**
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.
**/
typedef
EFI_STATUS
(EFIAPI *EFI_IDE_CONTROLLER_DISQUALIFY_MODE)(
IN EFI_IDE_CONTROLLER_INIT_PROTOCOL *This,
IN UINT8 Channel,
IN UINT8 Device,
IN EFI_ATA_COLLECTIVE_MODE *BadModes
);
/**
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.
**/
typedef
EFI_STATUS
(EFIAPI *EFI_IDE_CONTROLLER_CALCULATE_MODE)(
IN EFI_IDE_CONTROLLER_INIT_PROTOCOL *This,
IN UINT8 Channel,
IN UINT8 Device,
OUT EFI_ATA_COLLECTIVE_MODE **SupportedModes
);
/**
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.
**/
typedef
EFI_STATUS
(EFIAPI *EFI_IDE_CONTROLLER_SET_TIMING)(
IN EFI_IDE_CONTROLLER_INIT_PROTOCOL *This,
IN UINT8 Channel,
IN UINT8 Device,
IN EFI_ATA_COLLECTIVE_MODE *Modes
);
///
/// Provides the basic interfaces to abstract an IDE controller.
///
struct _EFI_IDE_CONTROLLER_INIT_PROTOCOL {
///
/// Returns the information about a specific channel.
///
EFI_IDE_CONTROLLER_GET_CHANNEL_INFO GetChannelInfo;
///
/// The notification that the driver entity is about to enter the
/// specified phase during the enumeration process.
///
EFI_IDE_CONTROLLER_NOTIFY_PHASE NotifyPhase;
///
/// Submits the Drive Identify data that was returned by the device.
///
EFI_IDE_CONTROLLER_SUBMIT_DATA SubmitData;
///
/// Submits information about modes that should be disqualified. The specified
/// IDE device does not support these modes and these modes should not be
/// returned by EFI_IDE_CONTROLLER_INIT_PROTOCOL.CalculateMode()
///
EFI_IDE_CONTROLLER_DISQUALIFY_MODE DisqualifyMode;
///
/// Calculates and returns the optimum mode for a particular IDE device.
///
EFI_IDE_CONTROLLER_CALCULATE_MODE CalculateMode;
///
/// Programs the IDE controller hardware to the default timing or per the modes
/// that were returned by the last call to EFI_IDE_CONTROLLER_INIT_PROTOCOL.CalculateMode().
///
EFI_IDE_CONTROLLER_SET_TIMING SetTiming;
///
/// Set to TRUE if the enumeration group includes all the channels that are
/// produced by this controller. Set to FALSE if an enumeration group consists of
/// only one channel.
///
BOOLEAN EnumAll;
///
/// The number of channels that are produced by this controller. Parallel ATA
/// (PATA) controllers can support up to two channels. Advanced Host Controller
/// Interface (AHCI) Serial ATA (SATA) controllers can support up to 32 channels,
/// each of which can have up to one device. In the presence of a multiplier,
/// each channel can have fifteen devices.
///
UINT8 ChannelCount;
};
extern EFI_GUID gEfiIdeControllerInitProtocolGuid;
#endif