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/*
* Copyright (c) 2014 VMware, Inc.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at:
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#include "precomp.h"
#include "Recirc.h"
#ifdef OVS_DBG_MOD
#undef OVS_DBG_MOD
#endif
#define OVS_DBG_MOD OVS_DBG_OTHERS
#include "Debug.h"
extern NDIS_HANDLE gOvsExtDriverHandle;
VOID*
OvsAllocateMemoryWithTag(size_t size, ULONG tag)
{
OVS_VERIFY_IRQL_LE(DISPATCH_LEVEL);
return NdisAllocateMemoryWithTagPriority(gOvsExtDriverHandle,
(UINT32)size, tag, NormalPoolPriority);
}
VOID
OvsFreeMemoryWithTag(VOID *ptr, ULONG tag)
{
ASSERT(ptr);
NdisFreeMemoryWithTagPriority(gOvsExtDriverHandle, ptr, tag);
}
VOID *
OvsAllocateMemory(size_t size)
{
OVS_VERIFY_IRQL_LE(DISPATCH_LEVEL);
return NdisAllocateMemoryWithTagPriority(gOvsExtDriverHandle,
(UINT32)size, OVS_MEMORY_TAG, NormalPoolPriority);
}
VOID *
OvsAllocateAlignedMemory(size_t size, UINT16 align)
{
OVS_VERIFY_IRQL_LE(DISPATCH_LEVEL);
ASSERT((align == 8) || (align == 16));
if ((align == 8) || (align == 16)) {
/*
* XXX: NdisAllocateMemory*() functions don't talk anything about
* alignment. Hence using ExAllocatePool*();
*/
return (VOID *)ExAllocatePoolWithTagPriority(NonPagedPool, size,
OVS_MEMORY_TAG,
NormalPoolPriority);
}
/* Invalid user input. */
return NULL;
}
VOID
OvsFreeMemory(VOID *ptr)
{
ASSERT(ptr);
NdisFreeMemoryWithTagPriority(gOvsExtDriverHandle, ptr, OVS_MEMORY_TAG);
}
VOID
OvsFreeAlignedMemory(VOID *ptr)
{
ASSERT(ptr);
ExFreePoolWithTag(ptr, OVS_MEMORY_TAG);
}
VOID
OvsAppendList(PLIST_ENTRY dst, PLIST_ENTRY src)
{
PLIST_ENTRY srcFirst, srcLast, dstLast;
if (IsListEmpty(src)) {
return;
}
srcFirst = src->Flink;
srcLast = src->Blink;
dstLast = dst->Blink;
dstLast->Flink = srcFirst;
srcFirst->Blink = dstLast;
srcLast->Flink = dst;
dst->Blink = srcLast;
src->Flink = src;
src->Blink = src;
}
BOOLEAN
OvsCompareString(PVOID string1, PVOID string2)
{
/*
* Not a super-efficient string compare since we walk over the strings
* twice: to initialize, and then to do the comparison.
*/
STRING str1, str2;
RtlInitString(&str1, string1);
RtlInitString(&str2, string2);
return RtlEqualString(&str1, &str2, FALSE);
}
VOID *
OvsAllocateMemoryPerCpu(size_t size,
size_t count,
ULONG tag)
{
VOID *ptr = NULL;
ASSERT(KeQueryActiveGroupCount() == 1);
if (!count) {
count = KeQueryActiveProcessorCountEx(ALL_PROCESSOR_GROUPS);
}
ptr = OvsAllocateMemoryWithTag(count * size, tag);
if (ptr) {
RtlZeroMemory(ptr, count * size);
}
return ptr;
}
/*
* --------------------------------------------------------------------------
* OvsPerCpuDataInit --
* The function allocates necessary per-processor resources.
* --------------------------------------------------------------------------
*/
NTSTATUS
OvsPerCpuDataInit()
{
return OvsDeferredActionsInit();
}
/*
* --------------------------------------------------------------------------
* OvsPerCpuDataCleanup --
* The function frees all per-processor resources.
* --------------------------------------------------------------------------
*/
VOID
OvsPerCpuDataCleanup()
{
OvsDeferredActionsCleanup();
}
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