AtaPortRegistryChannelSubkeyRead - NtDoc
Native API online documentation, based on the System Informer
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headers
// irb.h
BOOLEAN AtaPortRegistryChannelSubkeyRead(
[in] PVOID ChannelExtension,
[in] UCHAR ControllerNumber,
[in] PCHAR ValueName,
[in] UCHAR ValueType,
[out, optional] PUCHAR Buffer,
PULONG BufferLength
);
View the official Windows Driver Kit DDI referenceNo description available.
The AtaPortRegistryChannelSubKeyRead routine reads the data that is associated with the indicated value name under the registry key HKLM\CurrentControlSet\Services\<service name>\ControllerN\ChannelM, where N is the number of the controller and M is the number of the channel.
Note The ATA port driver and ATA miniport driver models may be altered or unavailable in the future. Instead, we recommend using the Storport driver and Storport miniport driver models.
ChannelExtension [in]A pointer to the channel extension.
ControllerNumber [in]Contains the controller number.
ValueName [in]Contains the name of the registry value from which to read.
ValueType [in]Indicates the type of data that is contained in the registry value. This member should be assigned one of values indicated in the following table.
| Value | Meaning |
|---|---|
| IDE_REG_DWORD | A 4-byte numeric value. |
| IDE_REG_BINARY | Binary data. |
| IDE_REG_SZ | A null-terminated. Unicode string. |
Buffer [out, optional]A pointer to the destination buffer where the data that is read from the registry will be written.
BufferLengthA pointer to the number of bytes of data to copy. If the operation fails, the location that is pointed to by Length will update to the length of data that was successfully copied from the registry.
AtaPortRegistryChannelSubKeyRead returns TRUE if the operation succeeds. Otherwise, it returns FALSE. The routine also returns FALSE if the miniport driver does not call it from the correct routine.
The buffer that is pointed to by Buffer must be allocated by using AtaPortRegistryAllocateBuffer.
The miniport driver must call AtaPortRegistryChannelSubKeyRead either during the AtaChannelInitRoutine routine or the IdeHwControl routine or it will return FALSE. Additionally, the miniport driver can only call AtaPortRegistryChannelSubKeyRead from its IdeHwControl routine if its IdeHwControl routine was called and had a value of either StartChannel or StopChannel in its ControlAction parameter.
AtaPortRegistryChannelSubKeyWrite