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/*
* Copyright (c) 2014, 2016 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.
*/
#ifndef __BUFFER_MGMT_H_
#define __BUFFER_MGMT_H_ 1
#define MEM_ALIGN MEMORY_ALLOCATION_ALIGNMENT
#define MEM_ALIGN_SIZE(_x) ((MEM_ALIGN - 1 + (_x))/MEM_ALIGN * MEM_ALIGN)
#define OVS_CTX_MAGIC 0xabcd
#define OVS_DEFAULT_NBL_CONTEXT_SIZE sizeof(OVS_BUFFER_CONTEXT)
#define OVS_DEFAULT_NBL_CONTEXT_FILL 0
#define OVS_DEFAULT_DATA_SIZE 256
#define OVS_DEFAULT_HEADROOM_SIZE 128
#define OVS_FIX_NBL_DATA_SIZE (OVS_DEFAULT_DATA_SIZE + OVS_DEFAULT_HEADROOM_SIZE)
#define OVS_IPV6_OPT_LEN(p) (((p)->hdrExtLen+1) << 3)
#define OVS_FRAG_MAGIC_NUMBER 0x8088405
/* Default we copy 18 bytes, to make sure ethernet header and vlan is in
* continuous buffer */
#define OVS_DEFAULT_COPY_SIZE 18
enum {
OVS_BUFFER_NEED_COMPLETE = BIT16(0),
OVS_BUFFER_PRIVATE_MDL = BIT16(1),
OVS_BUFFER_PRIVATE_DATA = BIT16(2),
OVS_BUFFER_PRIVATE_NET_BUFFER = BIT16(3),
OVS_BUFFER_PRIVATE_FORWARD_CONTEXT = BIT16(4),
OVS_BUFFER_PRIVATE_CONTEXT = BIT16(5),
OVS_BUFFER_FROM_FIX_SIZE_POOL = BIT16(6),
OVS_BUFFER_FROM_ZERO_SIZE_POOL = BIT16(7),
OVS_BUFFER_FROM_NBL_ONLY_POOL = BIT16(8),
OVS_BUFFER_RECV_BUFFER = BIT16(9),
OVS_BUFFER_SEND_BUFFER = BIT16(10),
OVS_BUFFER_FRAGMENT = BIT16(11),
};
typedef union _OVS_BUFFER_CONTEXT {
struct dummy {
UINT16 magic;
UINT16 flags;
UINT32 srcPortNo;
UINT32 refCount;
union {
UINT32 origDataLength;
UINT32 dataOffsetDelta;
};
ULONG sendFlags;
UINT16 mru;
UINT16 pendingSend; /* Indicates packet can be sent or not. */
};
CHAR value[MEM_ALIGN_SIZE(sizeof(struct dummy))];
} OVS_BUFFER_CONTEXT, *POVS_BUFFER_CONTEXT;
typedef struct _OVS_NBL_POOL {
NDIS_SWITCH_CONTEXT ndisContext;
NDIS_HANDLE ndisHandle;
NDIS_HANDLE fixSizePool; // data size of 256
NDIS_HANDLE zeroSizePool; // no data, NBL + NB + Context
NDIS_HANDLE nblOnlyPool; // NBL + context for clone
NDIS_HANDLE nbPool; // NB for clone
#ifdef DBG
LONG fixNBLCount;
LONG zeroNBLCount;
LONG nblOnlyCount;
LONG nbCount;
LONG sysNBLCount;
LONG fragNBLCount;
#endif
} OVS_NBL_POOL, *POVS_NBL_POOL;
NDIS_STATUS OvsInitBufferPool(PVOID context);
VOID OvsCleanupBufferPool(PVOID context);
PNET_BUFFER_LIST OvsAllocateFixSizeNBL(PVOID context,
UINT32 size,
UINT32 headRoom);
PNET_BUFFER_LIST OvsAllocateVariableSizeNBL(PVOID context,
UINT32 size,
UINT32 headRoom);
POVS_BUFFER_CONTEXT OvsInitExternalNBLContext(PVOID context,
PNET_BUFFER_LIST nbl,
BOOLEAN isRecv);
PNET_BUFFER_LIST OvsPartialCopyNBL(PVOID context,
PNET_BUFFER_LIST nbl,
UINT32 copySize,
UINT32 headRoom,
BOOLEAN copyNblInfo);
PNET_BUFFER_LIST OvsPartialCopyToMultipleNBLs(PVOID context,
PNET_BUFFER_LIST nbl,
UINT32 copySize,
UINT32 headRoom,
BOOLEAN copyNblInfo);
PNET_BUFFER_LIST OvsFullCopyNBL(PVOID context, PNET_BUFFER_LIST nbl,
UINT32 headRoom, BOOLEAN copyNblInfo);
PNET_BUFFER_LIST OvsTcpSegmentNBL(PVOID context,
PNET_BUFFER_LIST nbl,
POVS_PACKET_HDR_INFO hdrInfo,
UINT32 MSS,
UINT32 headRoom,
BOOLEAN isIpFragment);
PNET_BUFFER_LIST OvsFragmentNBL(PVOID context,
PNET_BUFFER_LIST nbl,
POVS_PACKET_HDR_INFO hdrInfo,
UINT32 MSS,
UINT32 headRoom,
BOOLEAN isIpFragment);
PNET_BUFFER_LIST OvsAllocateNBLFromBuffer(PVOID context,
PVOID buffer,
ULONG length);
PNET_BUFFER_LIST OvsFullCopyToMultipleNBLs(PVOID context, PNET_BUFFER_LIST nbl,
UINT32 headRoom,
BOOLEAN copyNblInfo);
PNET_BUFFER_LIST OvsCompleteNBL(PVOID context, PNET_BUFFER_LIST nbl,
BOOLEAN updateRef);
NDIS_STATUS OvsSetCtxSourcePortNo(PNET_BUFFER_LIST nbl, UINT32 portNo);
NDIS_STATUS OvsGetCtxSourcePortNo(PNET_BUFFER_LIST nbl, UINT32 *portNo);
NTSTATUS OvsCreateNewNBLsFromMultipleNBs(PVOID context,
PNET_BUFFER_LIST *curNbl,
PNET_BUFFER_LIST *lastNbl);
#endif /* __BUFFER_MGMT_H_ */
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