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peripheral.cpp
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peripheral.cpp
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/*++
Copyright (c) Microsoft Corporation. All rights reserved.
Module Name:
peripheral.cpp
Abstract:
This module contains the function for interaction
with the SPB API.
Environment:
kernel-mode only
Revision History:
--*/
#include "internal.h"
#include "peripheral.h"
#include "peripheral.tmh"
NTSTATUS
SpbPeripheralOpen(
_In_ PPBC_DEVICE pDevice
)
/*++
Routine Description:
This routine opens a handle to the SPB controller.
Arguments:
pDevice - a pointer to the device context
Return Value:
Status
--*/
{
FuncEntry(TRACE_FLAG_SPBAPI);
WDF_IO_TARGET_OPEN_PARAMS openParams;
NTSTATUS status;
//
// Create the device path using the connection ID.
//
DECLARE_UNICODE_STRING_SIZE(DevicePath, RESOURCE_HUB_PATH_SIZE);
WdfDeviceStopIdle(pDevice->FxDevice, WdfTrue);
if (pDevice->TrueSpbController == WDF_NO_HANDLE)
{
status = STATUS_NOT_SUPPORTED;
goto exit;
}
RESOURCE_HUB_CREATE_PATH_FROM_ID(
&DevicePath,
pDevice->PeripheralId.LowPart,
pDevice->PeripheralId.HighPart);
Trace(
TRACE_LEVEL_INFORMATION,
TRACE_FLAG_SPBDDI,
"Opening handle to SPB target via %wZ",
&DevicePath);
//
// Open a handle to the SPB controller.
//
WDF_IO_TARGET_OPEN_PARAMS_INIT_OPEN_BY_NAME(
&openParams,
&DevicePath,
(GENERIC_READ | GENERIC_WRITE));
openParams.ShareAccess = 0;
openParams.CreateDisposition = FILE_OPEN;
openParams.FileAttributes = FILE_ATTRIBUTE_NORMAL;
status = WdfIoTargetOpen(
pDevice->TrueSpbController,
&openParams);
if (!NT_SUCCESS(status))
{
Trace(
TRACE_LEVEL_ERROR,
TRACE_FLAG_SPBAPI,
"Failed to open SPB target - %!STATUS!",
status);
}
exit:
FuncExit(TRACE_FLAG_SPBDDI);
return status;
}
NTSTATUS
SpbPeripheralClose(
_In_ PPBC_DEVICE pDevice
)
/*++
Routine Description:
This routine closes a handle to the SPB controller.
Arguments:
pDevice - a pointer to the device context
Return Value:
Status
--*/
{
FuncEntry(TRACE_FLAG_SPBAPI);
UNREFERENCED_PARAMETER(pDevice);
Trace(
TRACE_LEVEL_INFORMATION,
TRACE_FLAG_SPBAPI,
"Closing handle to SPB target");
if (pDevice->TrueSpbController != WDF_NO_HANDLE)
WdfIoTargetClose(pDevice->TrueSpbController);
WdfDeviceResumeIdle(pDevice->FxDevice);
FuncExit(TRACE_FLAG_SPBAPI);
return STATUS_SUCCESS;
}
VOID
SpbPeripheralLock(
_In_ PPBC_DEVICE pDevice,
_In_ SPBREQUEST spbRequest
)
/*++
Routine Description:
This routine sends a lock command to the SPB controller.
Arguments:
pDevice - a pointer to the device context
spbRequest - the framework request object
Return Value:
None
--*/
{
FuncEntry(TRACE_FLAG_SPBAPI);
UNREFERENCED_PARAMETER(spbRequest);
NTSTATUS status;
Trace(
TRACE_LEVEL_INFORMATION,
TRACE_FLAG_SPBAPI,
"Formatting SPB request %p for IOCTL_SPB_LOCK_CONTROLLER",
pDevice->SpbRequest);
//
// Save the client request.
//
pDevice->ClientRequest = spbRequest;
//
// Initialize the SPB request for lock and send.
//
status = WdfIoTargetFormatRequestForIoctl(
pDevice->TrueSpbController,
pDevice->SpbRequest,
IOCTL_SPB_LOCK_CONTROLLER,
nullptr,
nullptr,
nullptr,
nullptr);
if (NT_SUCCESS(status))
{
status = SpbPeripheralSendRequest(
pDevice,
pDevice->SpbRequest,
spbRequest);
}
if (!NT_SUCCESS(status))
{
Trace(
TRACE_LEVEL_ERROR,
TRACE_FLAG_SPBAPI,
"Failed to send SPB request %p for "
"IOCTL_SPB_LOCK_CONTROLLER - %!STATUS!",
pDevice->SpbRequest,
status);
SpbPeripheralCompleteRequestPair(
pDevice,
status,
0);
}
FuncExit(TRACE_FLAG_SPBAPI);
}
VOID
SpbPeripheralUnlock(
_In_ PPBC_DEVICE pDevice,
_In_ SPBREQUEST spbRequest
)
/*++
Routine Description:
This routine sends an unlock command to the SPB controller.
Arguments:
pDevice - a pointer to the device context
spbRequest - the framework request object
Return Value:
None
--*/
{
FuncEntry(TRACE_FLAG_SPBAPI);
UNREFERENCED_PARAMETER(spbRequest);
NTSTATUS status;
Trace(
TRACE_LEVEL_INFORMATION,
TRACE_FLAG_SPBAPI,
"Formatting SPB request %p for IOCTL_SPB_UNLOCK_CONTROLLER",
pDevice->SpbRequest);
//
// Save the client request.
//
pDevice->ClientRequest = spbRequest;
//
// Initialize the SPB request for unlock and send.
//
status = WdfIoTargetFormatRequestForIoctl(
pDevice->TrueSpbController,
pDevice->SpbRequest,
IOCTL_SPB_UNLOCK_CONTROLLER,
nullptr,
nullptr,
nullptr,
nullptr);
if (NT_SUCCESS(status))
{
status = SpbPeripheralSendRequest(
pDevice,
pDevice->SpbRequest,
spbRequest);
}
if (!NT_SUCCESS(status))
{
Trace(
TRACE_LEVEL_ERROR,
TRACE_FLAG_SPBAPI,
"Failed to send SPB request %p for "
"IOCTL_SPB_UNLOCK_CONTROLLER - %!STATUS!",
pDevice->SpbRequest,
status);
SpbPeripheralCompleteRequestPair(
pDevice,
status,
0);
}
FuncExit(TRACE_FLAG_SPBAPI);
}
VOID
SpbPeripheralLockConnection(
_In_ PPBC_DEVICE pDevice,
_In_ SPBREQUEST spbRequest
)
/*++
Routine Description:
This routine sends a lock connection command to the SPB controller.
Arguments:
pDevice - a pointer to the device context
spbRequest - the framework request object
Return Value:
None
--*/
{
FuncEntry(TRACE_FLAG_SPBAPI);
UNREFERENCED_PARAMETER(spbRequest);
NTSTATUS status;
Trace(
TRACE_LEVEL_INFORMATION,
TRACE_FLAG_SPBAPI,
"Formatting SPB request %p for IOCTL_SPB_LOCK_CONNECTION",
pDevice->SpbRequest);
//
// Save the client request.
//
pDevice->ClientRequest = spbRequest;
//
// Initialize the SPB request for lock and send.
//
status = WdfIoTargetFormatRequestForIoctl(
pDevice->TrueSpbController,
pDevice->SpbRequest,
IOCTL_SPB_LOCK_CONNECTION,
nullptr,
nullptr,
nullptr,
nullptr);
if (NT_SUCCESS(status))
{
status = SpbPeripheralSendRequest(
pDevice,
pDevice->SpbRequest,
spbRequest);
}
if (!NT_SUCCESS(status))
{
Trace(
TRACE_LEVEL_ERROR,
TRACE_FLAG_SPBAPI,
"Failed to send SPB request %p for "
"IOCTL_SPB_LOCK_CONNECTION - %!STATUS!",
pDevice->SpbRequest,
status);
SpbPeripheralCompleteRequestPair(
pDevice,
status,
0);
}
FuncExit(TRACE_FLAG_SPBAPI);
}
VOID
SpbPeripheralUnlockConnection(
_In_ PPBC_DEVICE pDevice,
_In_ SPBREQUEST spbRequest
)
/*++
Routine Description:
This routine sends an unlock connection command to the SPB controller.
Arguments:
pDevice - a pointer to the device context
spbRequest - the framework request object
Return Value:
None
--*/
{
FuncEntry(TRACE_FLAG_SPBAPI);
UNREFERENCED_PARAMETER(spbRequest);
NTSTATUS status;
Trace(
TRACE_LEVEL_INFORMATION,
TRACE_FLAG_SPBAPI,
"Formatting SPB request %p for IOCTL_SPB_UNLOCK_CONNECTION",
pDevice->SpbRequest);
//
// Save the client request.
//
pDevice->ClientRequest = spbRequest;
//
// Initialize the SPB request for unlock and send.
//
status = WdfIoTargetFormatRequestForIoctl(
pDevice->TrueSpbController,
pDevice->SpbRequest,
IOCTL_SPB_UNLOCK_CONNECTION,
nullptr,
nullptr,
nullptr,
nullptr);
if (NT_SUCCESS(status))
{
status = SpbPeripheralSendRequest(
pDevice,
pDevice->SpbRequest,
spbRequest);
}
if (!NT_SUCCESS(status))
{
Trace(
TRACE_LEVEL_ERROR,
TRACE_FLAG_SPBAPI,
"Failed to send SPB request %p for "
"IOCTL_SPB_UNLOCK_CONNECTION - %!STATUS!",
pDevice->SpbRequest,
status);
SpbPeripheralCompleteRequestPair(
pDevice,
status,
0);
}
FuncExit(TRACE_FLAG_SPBAPI);
}
VOID
SpbTraceBufferIndex(
_In_ PPBC_DEVICE pDevice,
_In_ SPBREQUEST clientRequest,
_In_ ULONG index
)
{
SPB_TRANSFER_DESCRIPTOR transferDescriptor;
PMDL pMdl;
const ULONG max_len = 1024;
UCHAR pBuffer[max_len] = { 0 };
CHAR pPrefix[32]; /* format "device NNN: ##nn write llll -" */
CHAR pDataString[5 + 3 * 16 + 1]; /* format "0000: XX XX XX XX" */
int dataIndex;
SPB_TRANSFER_DESCRIPTOR_INIT(&transferDescriptor);
SpbRequestGetTransferParameters(
clientRequest,
index,
&transferDescriptor,
&pMdl);
for (ULONG offset = 0; offset < (ULONG)transferDescriptor.TransferLength; offset += max_len)
{
ULONG length = min((ULONG)transferDescriptor.TransferLength - offset, max_len);
for (ULONG i = 0; i < length; i++)
{
RequestGetByte(pMdl, transferDescriptor.TransferLength, i + offset, &pBuffer[i]);
}
sprintf_s(pPrefix, sizeof(pPrefix),
"device %3I64d: %c#%02d %5s %4lu - ",
pDevice->PeripheralId.QuadPart,
index == 0 ? '#' : ' ',
index,
transferDescriptor.Direction == SpbTransferDirectionToDevice ? "write" : "read",
(unsigned long)transferDescriptor.TransferLength
);
dataIndex = 0;
dataIndex += sprintf(&pDataString[dataIndex], "%04x: %02x", offset, pBuffer[0]);
for (ULONG i = 1; i <= length; i++)
{
if ((i % 16 == 0) || i == length)
{
Trace(
TRACE_LEVEL_ERROR,
TRACE_FLAG_SPBAPI,
"%s %s",
pPrefix,
pDataString
);
if (i == length)
{
break;
}
dataIndex = 0;
dataIndex += sprintf(&pDataString[dataIndex], "%04x:", i + offset);
}
dataIndex += sprintf(&pDataString[dataIndex], " %02x", pBuffer[i]);
}
}
}
VOID
SpbTraceBuffers(
_In_ PPBC_DEVICE pDevice,
_In_ SPBREQUEST clientRequest
)
{
SPB_REQUEST_PARAMETERS parameters;
SPB_REQUEST_PARAMETERS_INIT(¶meters);
SpbRequestGetParameters(clientRequest, ¶meters);
for (ULONG i = 0; i < parameters.SequenceTransferCount; i += 1)
{
SpbTraceBufferIndex(pDevice, clientRequest, i);
}
}
VOID
SpbPeripheralRead(
_In_ PPBC_DEVICE pDevice,
_In_ SPBREQUEST spbRequest,
_In_ BOOLEAN FullDuplex
)
/*++
Routine Description:
This routine reads from the SPB controller.
Arguments:
pDevice - a pointer to the device context
spbRequest - the framework request object
Return Value:
None
--*/
{
FuncEntry(TRACE_FLAG_SPBAPI);
UNREFERENCED_PARAMETER(spbRequest);
WDFMEMORY memory = nullptr;
NTSTATUS status;
Trace(
TRACE_LEVEL_INFORMATION,
TRACE_FLAG_SPBAPI,
"Formatting SPB request %p for read",
pDevice->SpbRequest);
//
// Save the client request.
//
pDevice->ClientRequest = spbRequest;
//
// Initialize the SPB request for read and send.
//
if (!FullDuplex)
{
status = WdfRequestRetrieveOutputMemory(
spbRequest,
&memory);
}
else
{
status = WdfRequestRetrieveInputMemory(
spbRequest,
&memory);
}
if (NT_SUCCESS(status))
{
status = WdfIoTargetFormatRequestForRead(
pDevice->TrueSpbController,
pDevice->SpbRequest,
memory,
nullptr,
nullptr);
if (NT_SUCCESS(status))
{
status = SpbPeripheralSendRequest(
pDevice,
pDevice->SpbRequest,
spbRequest);
}
}
if (!NT_SUCCESS(status))
{
Trace(
TRACE_LEVEL_ERROR,
TRACE_FLAG_SPBAPI,
"Failed to send SPB request %p for "
"read - %!STATUS!",
pDevice->SpbRequest,
status);
SpbPeripheralCompleteRequestPair(
pDevice,
status,
0);
}
FuncExit(TRACE_FLAG_SPBAPI);
}
VOID
SpbPeripheralWrite(
_In_ PPBC_DEVICE pDevice,
_In_ SPBREQUEST spbRequest,
_In_ BOOLEAN FullDuplex
)
/*++
Routine Description:
This routine writes to the SPB controller.
Arguments:
pDevice - a pointer to the device context
spbRequest - the framework request object
Return Value:
None
--*/
{
FuncEntry(TRACE_FLAG_SPBAPI);
UNREFERENCED_PARAMETER(spbRequest);
WDFMEMORY memory = nullptr;
NTSTATUS status;
Trace(
TRACE_LEVEL_INFORMATION,
TRACE_FLAG_SPBAPI,
"Formatting SPB request %p for write",
pDevice->SpbRequest);
//
// Save the client request.
//
pDevice->ClientRequest = spbRequest;
//
// Initialize the SPB request for write and send.
//
if (!FullDuplex)
{
status = WdfRequestRetrieveInputMemory(
spbRequest,
&memory);
}
else
{
status = WdfRequestRetrieveOutputMemory(
spbRequest,
&memory);
}
if (NT_SUCCESS(status))
{
status = WdfIoTargetFormatRequestForWrite(
pDevice->TrueSpbController,
pDevice->SpbRequest,
memory,
nullptr,
nullptr);
if (NT_SUCCESS(status))
{
status = SpbPeripheralSendRequest(
pDevice,
pDevice->SpbRequest,
spbRequest);
}
}
if (!NT_SUCCESS(status))
{
Trace(
TRACE_LEVEL_ERROR,
TRACE_FLAG_SPBAPI,
"Failed to send SPB request %p for "
"write - %!STATUS!",
pDevice->SpbRequest,
status);
SpbPeripheralCompleteRequestPair(
pDevice,
status,
0);
}
FuncExit(TRACE_FLAG_SPBAPI);
}
VOID
SpbPeripheralFullDuplex(
_In_ PPBC_DEVICE pDevice,
_In_ SPBREQUEST spbRequest
)
/*++
Routine Description:
This routine sends a full duplex transfer to the SPB controller.
Arguments:
pDevice - a pointer to the device context
spbRequest - the framework request object
Return Value:
None
--*/
{
FuncEntry(TRACE_FLAG_SPBAPI);
UNREFERENCED_PARAMETER(spbRequest);
WDF_OBJECT_ATTRIBUTES attributes;
PPBC_REQUEST pRequest;
NTSTATUS status;
pRequest = GetRequestContext(pDevice->SpbRequest);
Trace(
TRACE_LEVEL_INFORMATION,
TRACE_FLAG_SPBAPI,
"Formatting SPB request %p for IOCTL_SPB_FULL_DUPLEX",
pDevice->SpbRequest);
//
// Save the client request.
//
pDevice->ClientRequest = spbRequest;
//
// Get input and output buffers.
//
const ULONG fullDuplexWriteIndex = 0;
const ULONG fullDuplexReadIndex = 1;
SPB_TRANSFER_DESCRIPTOR writeDescriptor;
SPB_TRANSFER_DESCRIPTOR readDescriptor;
PMDL pWriteMdl;
PMDL pReadMdl;
SPB_TRANSFER_DESCRIPTOR_INIT(&writeDescriptor);
SPB_TRANSFER_DESCRIPTOR_INIT(&readDescriptor);
SpbRequestGetTransferParameters(
spbRequest,
fullDuplexWriteIndex,
&writeDescriptor,
&pWriteMdl);
SpbRequestGetTransferParameters(
spbRequest,
fullDuplexReadIndex,
&readDescriptor,
&pReadMdl);
//
// Build full duplex transfer using SPB transfer list.
//
const ULONG transfers = 2;
SPB_TRANSFER_LIST_AND_ENTRIES(transfers) seq;
SPB_TRANSFER_LIST_INIT(&(seq.List), transfers);
{
//
// PreFAST cannot figure out the SPB_TRANSFER_LIST_ENTRY
// "struct hack" size but using an index variable quiets
// the warning. This is a false positive from OACR.
//
const ULONG index = 0;
seq.List.Transfers[index] = SPB_TRANSFER_LIST_ENTRY_INIT_MDL(
SpbTransferDirectionToDevice,
0,
pWriteMdl);
seq.List.Transfers[index + 1] = SPB_TRANSFER_LIST_ENTRY_INIT_MDL(
SpbTransferDirectionFromDevice,
0,
pReadMdl);
}
//
// Create preallocated WDFMEMORY. The IOCTL is METHOD_BUFFERED,
// so the memory doesn't have to persist until the request is
// completed.
//
NT_ASSERT(pDevice->InputMemory == WDF_NO_HANDLE);
WDF_OBJECT_ATTRIBUTES_INIT(&attributes);
status = WdfMemoryCreatePreallocated(
&attributes,
(PVOID)&seq,
sizeof(seq),
&pDevice->InputMemory);
if (!NT_SUCCESS(status))
{
Trace(
TRACE_LEVEL_ERROR,
TRACE_FLAG_SPBAPI,
"Failed to create WDFMEMORY - %!STATUS!",
status);
goto Done;
}
Trace(
TRACE_LEVEL_INFORMATION,
TRACE_FLAG_SPBAPI,
"Built full duplex transfer %p with byte length=%lu",
&seq,
(ULONG)(writeDescriptor.TransferLength + readDescriptor.TransferLength));
//
// Send full duplex IOCTL.
//
//
// Format and send the full duplex request.
//
status = WdfIoTargetFormatRequestForIoctl(
pDevice->TrueSpbController,
pDevice->SpbRequest,
IOCTL_SPB_FULL_DUPLEX,
pDevice->InputMemory,
nullptr,
nullptr,
nullptr);
if (!NT_SUCCESS(status))
{
Trace(
TRACE_LEVEL_ERROR,
TRACE_FLAG_SPBAPI,
"Failed to format request - %!STATUS!",
status);
goto Done;
}
status = SpbPeripheralSendRequest(
pDevice,
pDevice->SpbRequest,
spbRequest);
if (!NT_SUCCESS(status))
{
Trace(
TRACE_LEVEL_ERROR,
TRACE_FLAG_SPBAPI,
"Failed to send SPB request %p for "
"IOCTL_SPB_FULL_DUPLEX - %!STATUS!",
pDevice->SpbRequest,
status);
goto Done;
}
Done:
if (!NT_SUCCESS(status))
{
SpbPeripheralCompleteRequestPair(
pDevice,
status,
0);
}
FuncExit(TRACE_FLAG_SPBAPI);
}
NTSTATUS
SpbPeripheralSequence1(
_In_ PPBC_DEVICE pDevice,
_In_ SPBREQUEST spbRequest
)
/*++
Routine Description:
This routine sends a sequence of 1 transfer to the SPB controller.
Arguments:
pDevice - a pointer to the device context
spbRequest - the framework request object
Return Value:
None
--*/
{
FuncEntry(TRACE_FLAG_SPBAPI);
UNREFERENCED_PARAMETER(spbRequest);
WDF_OBJECT_ATTRIBUTES attributes;
PPBC_REQUEST pRequest;
NTSTATUS status;
pRequest = GetRequestContext(pDevice->SpbRequest);
Trace(
TRACE_LEVEL_INFORMATION,
TRACE_FLAG_SPBAPI,
"Formatting SPB request %p for IOCTL_SPB_EXECUTE_SEQUENCE",
pDevice->SpbRequest);
//
// Save the client request.
//
pDevice->ClientRequest = spbRequest;
//
// Get buffer.
//
SPB_TRANSFER_DESCRIPTOR firstDescriptor;
PMDL pFirstMdl;
SPB_TRANSFER_DESCRIPTOR_INIT(&firstDescriptor);
SpbRequestGetTransferParameters(
spbRequest,
0,
&firstDescriptor,
&pFirstMdl);
//
// Build full duplex transfer using SPB transfer list.
//
const ULONG transfers = 2;