AtaPortRegistryControllerKeyRead - NtDoc
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headers
// irb.h
BOOLEAN AtaPortRegistryControllerKeyRead(
[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 AtaPortRegistryControllerKeyRead routine reads the data that is associated with the indicated value name under the registry key HKLM\CurrentControlSet\Services\<service name>\ControllerN, where N is the number of the controller.
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 to read.
ValueType [in]Indicates the type of the data that is contained in the registry value. This parameter should be assigned one of values indicated in the following table.
| Value type | 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 buffer where the results are to be copied.
BufferLengthA pointer to the number of bytes of data to copy. If the operation fails because of an insufficient buffer, the location that is pointed to by Length will update to the actual length of the data in the registry.
AtaPortRegistryControllerKeyRead returns TRUE if the operation succeeds. Otherwise, it returns FALSE. The AtaPortRegistryControllerKeyRead routine also returns FALSE if the miniport driver does not call it from the correct routine.
The buffer at Buffer must be allocated by using AtaPortRegistryAllocateBuffer.
The miniport driver must call AtaPortRegistryControllerKeyRead either in its AtaChannelInitRoutine routine or in its IdeHwControl routine. It cannot call AtaPortRegistryControllerKeyRead from any other routine. Additionally, the miniport driver can only call AtaPortRegistryControllerKeyRead from its IdeHwControl routine if its IdeHwControl routine was called and had a value of either StartChannel or StopChannel in its ControlAction parameter.