/*
* --------------------------------------------------------------------------
* Creates the communication device between user and kernel, and also
* initializes the data associated data structures.
* --------------------------------------------------------------------------
*/
NDIS_STATUS
OvsCreateDeviceObject(NDIS_HANDLE ovsExtDriverHandle)
{
NDIS_STATUS status = NDIS_STATUS_SUCCESS;
UNICODE_STRING deviceName;
UNICODE_STRING symbolicDeviceName;
PDRIVER_DISPATCH dispatchTable[IRP_MJ_MAXIMUM_FUNCTION+1];
NDIS_DEVICE_OBJECT_ATTRIBUTES deviceAttributes;
OVS_LOG_TRACE("ovsExtDriverHandle: %p", ovsExtDriverHandle);
RtlZeroMemory(dispatchTable,
(IRP_MJ_MAXIMUM_FUNCTION + 1) * sizeof (PDRIVER_DISPATCH));
dispatchTable[IRP_MJ_CREATE] = OvsOpenCloseDevice;
dispatchTable[IRP_MJ_CLOSE] = OvsOpenCloseDevice;
dispatchTable[IRP_MJ_CLEANUP] = OvsCleanupDevice;
dispatchTable[IRP_MJ_DEVICE_CONTROL] = OvsDeviceControl;
NdisInitUnicodeString(&deviceName, OVS_DEVICE_NAME_NT);
NdisInitUnicodeString(&symbolicDeviceName, OVS_DEVICE_NAME_DOS);
RtlZeroMemory(&deviceAttributes, sizeof (NDIS_DEVICE_OBJECT_ATTRIBUTES));
OVS_INIT_OBJECT_HEADER(&deviceAttributes.Header,
NDIS_OBJECT_TYPE_DEVICE_OBJECT_ATTRIBUTES,
NDIS_DEVICE_OBJECT_ATTRIBUTES_REVISION_1,
sizeof (NDIS_DEVICE_OBJECT_ATTRIBUTES));
deviceAttributes.DeviceName = &deviceName;
deviceAttributes.SymbolicName = &symbolicDeviceName;
deviceAttributes.MajorFunctions = dispatchTable;
deviceAttributes.ExtensionSize = sizeof (OVS_DEVICE_EXTENSION);
status = NdisRegisterDeviceEx(ovsExtDriverHandle,
&deviceAttributes,
&gOvsDeviceObject,
&gOvsDeviceHandle);
if (status != NDIS_STATUS_SUCCESS) {
POVS_DEVICE_EXTENSION ovsExt =
(POVS_DEVICE_EXTENSION)NdisGetDeviceReservedExtension(gOvsDeviceObject);
ASSERT(gOvsDeviceObject != NULL);
ASSERT(gOvsDeviceHandle != NULL);
if (ovsExt) {
ovsExt->numberOpenInstance = 0;
}
} else {
/* Initialize the associated data structures. */
OvsInit();
}
OVS_LOG_TRACE("DeviceObject: %p", gOvsDeviceObject);
return status;
}
/*
* --------------------------------------------------------------------------
* OvsInitBufferPool --
*
* Allocate NBL and NB pool
*
* XXX: more optimization may be done for buffer management include local cache
* of NBL, NB, data, context, MDL.
* --------------------------------------------------------------------------
*/
NDIS_STATUS
OvsInitBufferPool(PVOID ovsContext)
{
POVS_NBL_POOL ovsPool;
POVS_SWITCH_CONTEXT context = (POVS_SWITCH_CONTEXT)ovsContext;
NET_BUFFER_LIST_POOL_PARAMETERS nblParam;
NET_BUFFER_POOL_PARAMETERS nbParam;
C_ASSERT(MEMORY_ALLOCATION_ALIGNMENT >= 8);
OVS_LOG_TRACE("Enter: context: %p", context);
ovsPool = &context->ovsPool;
RtlZeroMemory(ovsPool, sizeof (OVS_NBL_POOL));
ovsPool->ndisHandle = context->NdisFilterHandle;
ovsPool->ndisContext = context->NdisSwitchContext;
/*
* fix size NBL pool includes
* NBL + NB + MDL + DATA + Context
* This is mainly used for Packet execute or slow path when copy is
* required and size is less than OVS_DEFAULT_DATA_SIZE. We expect
* Most of packet from user space will use this Pool. (This is
* true for all bfd and cfm packet.
*/
RtlZeroMemory(&nblParam, sizeof (nblParam));
OVS_INIT_OBJECT_HEADER(&nblParam.Header,
NDIS_OBJECT_TYPE_DEFAULT,
NET_BUFFER_LIST_POOL_PARAMETERS_REVISION_1,
NDIS_SIZEOF_NET_BUFFER_LIST_POOL_PARAMETERS_REVISION_1);
nblParam.ContextSize = OVS_DEFAULT_NBL_CONTEXT_SIZE;
nblParam.PoolTag = OVS_FIX_SIZE_NBL_POOL_TAG;
nblParam.fAllocateNetBuffer = TRUE;
nblParam.DataSize = OVS_DEFAULT_DATA_SIZE + OVS_DEFAULT_HEADROOM_SIZE;
ovsPool->fixSizePool =
NdisAllocateNetBufferListPool(context->NdisSwitchContext, &nblParam);
if (ovsPool->fixSizePool == NULL) {
goto pool_cleanup;
}
/*
* Zero Size NBL Pool includes
* NBL + NB + Context
* This is mainly for packet with large data Size, in this case MDL and
* Data will be allocate separately.
*/
RtlZeroMemory(&nblParam, sizeof (nblParam));
OVS_INIT_OBJECT_HEADER(&nblParam.Header,
NDIS_OBJECT_TYPE_DEFAULT,
NET_BUFFER_LIST_POOL_PARAMETERS_REVISION_1,
NDIS_SIZEOF_NET_BUFFER_LIST_POOL_PARAMETERS_REVISION_1);
nblParam.ContextSize = OVS_DEFAULT_NBL_CONTEXT_SIZE;
nblParam.PoolTag = OVS_VARIABLE_SIZE_NBL_POOL_TAG;
nblParam.fAllocateNetBuffer = TRUE;
nblParam.DataSize = 0;
ovsPool->zeroSizePool =
NdisAllocateNetBufferListPool(context->NdisSwitchContext, &nblParam);
if (ovsPool->zeroSizePool == NULL) {
goto pool_cleanup;
}
/*
* NBL only pool just includes
* NBL (+ context)
* This is mainly used for clone and partial copy
*/
RtlZeroMemory(&nblParam, sizeof (nblParam));
OVS_INIT_OBJECT_HEADER(&nblParam.Header,
NDIS_OBJECT_TYPE_DEFAULT,
NET_BUFFER_LIST_POOL_PARAMETERS_REVISION_1,
NDIS_SIZEOF_NET_BUFFER_LIST_POOL_PARAMETERS_REVISION_1);
nblParam.ContextSize = OVS_DEFAULT_NBL_CONTEXT_SIZE;
nblParam.PoolTag = OVS_NBL_ONLY_POOL_TAG;
nblParam.fAllocateNetBuffer = FALSE;
nblParam.DataSize = 0;
ovsPool->nblOnlyPool =
NdisAllocateNetBufferListPool(context->NdisSwitchContext, &nblParam);
if (ovsPool->nblOnlyPool == NULL) {
goto pool_cleanup;
}
/* nb Pool
* NB only pool, used for copy
*/
OVS_INIT_OBJECT_HEADER(&nbParam.Header,
NDIS_OBJECT_TYPE_DEFAULT,
NET_BUFFER_POOL_PARAMETERS_REVISION_1,
NDIS_SIZEOF_NET_BUFFER_POOL_PARAMETERS_REVISION_1);
nbParam.PoolTag = OVS_NET_BUFFER_POOL_TAG;
nbParam.DataSize = 0;
ovsPool->nbPool =
NdisAllocateNetBufferPool(context->NdisSwitchContext, &nbParam);
if (ovsPool->nbPool == NULL) {
goto pool_cleanup;
}
OVS_LOG_TRACE("Exit: fixSizePool: %p zeroSizePool: %p nblOnlyPool: %p"
"nbPool: %p", ovsPool->fixSizePool, ovsPool->zeroSizePool,
ovsPool->nblOnlyPool, ovsPool->nbPool);
return NDIS_STATUS_SUCCESS;
pool_cleanup:
OvsCleanupBufferPool(context);
OVS_LOG_TRACE("Exit: Fail to initialize ovs buffer pool");
return NDIS_STATUS_RESOURCES;
}
