diff options
Diffstat (limited to 'PcAtChipsetPkg')
| -rw-r--r-- | PcAtChipsetPkg/Bus/Pci/IdeControllerDxe/IdeController.c | 255 | ||||
| -rw-r--r-- | PcAtChipsetPkg/Bus/Pci/IdeControllerDxe/IdeController.h | 253 |
2 files changed, 401 insertions, 107 deletions
diff --git a/PcAtChipsetPkg/Bus/Pci/IdeControllerDxe/IdeController.c b/PcAtChipsetPkg/Bus/Pci/IdeControllerDxe/IdeController.c index 5dfb98dc76..21b8e26297 100644 --- a/PcAtChipsetPkg/Bus/Pci/IdeControllerDxe/IdeController.c +++ b/PcAtChipsetPkg/Bus/Pci/IdeControllerDxe/IdeController.c @@ -3,7 +3,7 @@ IDE Bus driver to support platform dependent timing information. This driver
is responsible for early initialization of IDE controller.
- Copyright (c) 2008 - 2010, Intel Corporation. All rights reserved.<BR>
+ Copyright (c) 2008 - 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
which accompanies this distribution. The full text of the license may be found at
@@ -313,18 +313,40 @@ IdeControllerStop ( // Interface functions of IDE_CONTROLLER_INIT protocol
//
/**
- This function can be used to obtain information about a specified channel.
- It's usually used by IDE Bus driver during enumeration process.
-
- @param This the EFI_IDE_CONTROLLER_INIT_PROTOCOL instance.
- @param Channel Channel number (0 based, either 0 or 1)
- @param Enabled TRUE if the channel is enabled. If the channel is disabled,
- then it will no be enumerated.
- @param MaxDevices The Max number of IDE devices that the bus driver can expect
- on this channel. For ATA/ATAPI, this number is either 1 or 2.
-
- @retval EFI_SUCCESS Success to get channel information
- @retval EFI_INVALID_PARAMETER Invalid channel id.
+ 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
@@ -349,14 +371,28 @@ IdeInitGetChannelInfo ( }
/**
- This function is called by IdeBus driver before executing certain actions.
- This allows IDE Controller Init to prepare for each action.
-
- @param This the EFI_IDE_CONTROLLER_INIT_PROTOCOL instance.
- @param Phase phase indicator defined by IDE_CONTROLLER_INIT protocol
- @param Channel Channel number (0 based, either 0 or 1)
+ 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.
- @return EFI_SUCCESS Success operation.
**/
EFI_STATUS
EFIAPI
@@ -370,15 +406,43 @@ IdeInitNotifyPhase ( }
/**
- This function is called by IdeBus driver to submit EFI_IDENTIFY_DATA data structure
- obtained from IDE deivce. This structure is used to set IDE timing
+ 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.
- @param This The EFI_IDE_CONTROLLER_INIT_PROTOCOL instance.
- @param Channel IDE channel number (0 based, either 0 or 1)
- @param Device IDE device number
- @param IdentifyData A pointer to EFI_IDENTIFY_DATA data structure
-
- @return EFI_SUCCESS Success operation.
**/
EFI_STATUS
EFIAPI
@@ -393,15 +457,44 @@ IdeInitSubmitData ( }
/**
- This function is called by IdeBus driver to disqualify unsupported operation
- mode on specfic IDE device
-
- @param This the EFI_IDE_CONTROLLER_INIT_PROTOCOL instance.
- @param Channel IDE channel number (0 based, either 0 or 1)
- @param Device IDE device number
- @param BadModes Operation mode indicator
-
- @return EFI_SUCCESS Success operation.
+ 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
@@ -416,16 +509,58 @@ IdeInitDisqualifyMode ( }
/**
- This function is called by IdeBus driver to calculate the best operation mode
- supported by specific IDE device
-
- @param This the EFI_IDE_CONTROLLER_INIT_PROTOCOL instance.
- @param Channel IDE channel number (0 based, either 0 or 1)
- @param Device IDE device number
- @param SupportedModes Modes collection supported by IDE device
+ 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.
- @retval EFI_OUT_OF_RESOURCES Fail to allocate pool.
- @retval EFI_INVALID_PARAMETER Invalid channel id and device id.
**/
EFI_STATUS
EFIAPI
@@ -449,15 +584,27 @@ IdeInitCalculateMode ( }
/**
- This function is called by IdeBus driver to set appropriate timing on IDE
- controller according supported operation mode.
-
- @param This the EFI_IDE_CONTROLLER_INIT_PROTOCOL instance.
- @param Channel IDE channel number (0 based, either 0 or 1)
- @param Device IDE device number
- @param Modes IDE device modes
+ 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.
- @retval EFI_SUCCESS Sucess operation.
**/
EFI_STATUS
EFIAPI
diff --git a/PcAtChipsetPkg/Bus/Pci/IdeControllerDxe/IdeController.h b/PcAtChipsetPkg/Bus/Pci/IdeControllerDxe/IdeController.h index b612fbab24..3ecde081e2 100644 --- a/PcAtChipsetPkg/Bus/Pci/IdeControllerDxe/IdeController.h +++ b/PcAtChipsetPkg/Bus/Pci/IdeControllerDxe/IdeController.h @@ -117,18 +117,40 @@ IdeControllerStop ( // IDE controller init functions declaration
//
/**
- This function can be used to obtain information about a specified channel.
- It's usually used by IDE Bus driver during enumeration process.
-
- @param This the EFI_IDE_CONTROLLER_INIT_PROTOCOL instance.
- @param Channel Channel number (0 based, either 0 or 1)
- @param Enabled TRUE if the channel is enabled. If the channel is disabled,
- then it will no be enumerated.
- @param MaxDevices The Max number of IDE devices that the bus driver can expect
- on this channel. For ATA/ATAPI, this number is either 1 or 2.
-
- @retval EFI_SUCCESS Success to get channel information
- @retval EFI_INVALID_PARAMETER Invalid channel id.
+ 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
@@ -141,14 +163,28 @@ IdeInitGetChannelInfo ( ;
/**
- This function is called by IdeBus driver before executing certain actions.
- This allows IDE Controller Init to prepare for each action.
-
- @param This the EFI_IDE_CONTROLLER_INIT_PROTOCOL instance.
- @param Phase phase indicator defined by IDE_CONTROLLER_INIT protocol
- @param Channel Channel number (0 based, either 0 or 1)
+ 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.
- @return EFI_SUCCESS Success operation.
**/
EFI_STATUS
EFIAPI
@@ -160,15 +196,43 @@ IdeInitNotifyPhase ( ;
/**
- This function is called by IdeBus driver to submit EFI_IDENTIFY_DATA data structure
- obtained from IDE deivce. This structure is used to set IDE timing
+ 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.
- @param This The EFI_IDE_CONTROLLER_INIT_PROTOCOL instance.
- @param Channel IDE channel number (0 based, either 0 or 1)
- @param Device IDE device number
- @param IdentifyData A pointer to EFI_IDENTIFY_DATA data structure
-
- @return EFI_SUCCESS Success operation.
**/
EFI_STATUS
EFIAPI
@@ -181,15 +245,44 @@ IdeInitSubmitData ( ;
/**
- This function is called by IdeBus driver to disqualify unsupported operation
- mode on specfic IDE device
-
- @param This the EFI_IDE_CONTROLLER_INIT_PROTOCOL instance.
- @param Channel IDE channel number (0 based, either 0 or 1)
- @param Device IDE device number
- @param BadModes Operation mode indicator
-
- @return EFI_SUCCESS Success operation.
+ 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
@@ -202,16 +295,58 @@ IdeInitDisqualifyMode ( ;
/**
- This function is called by IdeBus driver to calculate the best operation mode
- supported by specific IDE device
-
- @param This the EFI_IDE_CONTROLLER_INIT_PROTOCOL instance.
- @param Channel IDE channel number (0 based, either 0 or 1)
- @param Device IDE device number
- @param SupportedModes Modes collection supported by IDE device
+ 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.
- @retval EFI_OUT_OF_RESOURCES Fail to allocate pool.
- @retval EFI_INVALID_PARAMETER Invalid channel id and device id.
**/
EFI_STATUS
EFIAPI
@@ -224,15 +359,27 @@ IdeInitCalculateMode ( ;
/**
- This function is called by IdeBus driver to set appropriate timing on IDE
- controller according supported operation mode.
-
- @param This the EFI_IDE_CONTROLLER_INIT_PROTOCOL instance.
- @param Channel IDE channel number (0 based, either 0 or 1)
- @param Device IDE device number
- @param Modes IDE device modes
+ 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.
- @retval EFI_SUCCESS Sucess operation.
**/
EFI_STATUS
EFIAPI
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