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* Copyright (c) 2009, Microsoft Corporation.
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* This program is free software; you can redistribute it and/or modify it
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* under the terms and conditions of the GNU General Public License,
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* version 2, as published by the Free Software Foundation.
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* This program is distributed in the hope it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
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* You should have received a copy of the GNU General Public License along with
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* this program; if not, write to the Free Software Foundation, Inc., 59 Temple
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* Place - Suite 330, Boston, MA 02111-1307 USA.
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* Haiyang Zhang <haiyangz@microsoft.com>
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* Hank Janssen <hjanssen@microsoft.com>
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#include <linux/list.h>
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#include "vmbus_packet_format.h"
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#include "vmbus_channel_interface.h"
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#include "netvsc_api.h"
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#define NVSP_INVALID_PROTOCOL_VERSION ((u32)0xFFFFFFFF)
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#define NVSP_PROTOCOL_VERSION_1 2
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#define NVSP_MIN_PROTOCOL_VERSION NVSP_PROTOCOL_VERSION_1
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#define NVSP_MAX_PROTOCOL_VERSION NVSP_PROTOCOL_VERSION_1
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NVSP_MSG_TYPE_NONE = 0,
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NVSP_MSG_TYPE_INIT = 1,
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NVSP_MSG_TYPE_INIT_COMPLETE = 2,
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NVSP_VERSION_MSG_START = 100,
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/* Version 1 Messages */
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NVSP_MSG1_TYPE_SEND_NDIS_VER = NVSP_VERSION_MSG_START,
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NVSP_MSG1_TYPE_SEND_RECV_BUF,
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NVSP_MSG1_TYPE_SEND_RECV_BUF_COMPLETE,
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NVSP_MSG1_TYPE_REVOKE_RECV_BUF,
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NVSP_MSG1_TYPE_SEND_SEND_BUF,
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NVSP_MSG1_TYPE_SEND_SEND_BUF_COMPLETE,
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NVSP_MSG1_TYPE_REVOKE_SEND_BUF,
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NVSP_MSG1_TYPE_SEND_RNDIS_PKT,
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NVSP_MSG1_TYPE_SEND_RNDIS_PKT_COMPLETE,
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* This should be set to the number of messages for the version with
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* the maximum number of messages.
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NVSP_NUM_MSG_PER_VERSION = 9,
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NVSP_STAT_PROTOCOL_TOO_NEW,
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NVSP_STAT_PROTOCOL_TOO_OLD,
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NVSP_STAT_INVALID_RNDIS_PKT,
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struct nvsp_message_header {
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* This message is used by the VSC to initialize the channel after the channels
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* has been opened. This message should never include anything other then
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* versioning (i.e. this message will be the same for ever).
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struct nvsp_message_init {
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} __attribute__((packed));
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* This message is used by the VSP to complete the initialization of the
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* channel. This message should never include anything other then versioning
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* (i.e. this message will be the same for ever).
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struct nvsp_message_init_complete {
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u32 negotiated_protocol_ver;
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u32 max_mdl_chain_len;
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} __attribute__((packed));
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union nvsp_message_init_uber {
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struct nvsp_message_init init;
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struct nvsp_message_init_complete init_complete;
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} __attribute__((packed));
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/* Version 1 Messages */
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* This message is used by the VSC to send the NDIS version to the VSP. The VSP
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* can use this information when handling OIDs sent by the VSC.
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struct nvsp_1_message_send_ndis_version {
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} __attribute__((packed));
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* This message is used by the VSC to send a receive buffer to the VSP. The VSP
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* can then use the receive buffer to send data to the VSC.
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struct nvsp_1_message_send_receive_buffer {
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} __attribute__((packed));
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struct nvsp_1_receive_buffer_section {
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} __attribute__((packed));
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* This message is used by the VSP to acknowledge a receive buffer send by the
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* VSC. This message must be sent by the VSP before the VSP uses the receive
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struct nvsp_1_message_send_receive_buffer_complete {
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* The receive buffer is split into two parts, a large suballocation
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* section and a small suballocation section. These sections are then
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* suballocated by a certain size.
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* For example, the following break up of the receive buffer has 6
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* large suballocations and 10 small suballocations.
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* | Large Section | | Small Section |
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* ------------------------------------------------------------
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* | | | | | | | | | | | | | | | | | |
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* LargeOffset SmallOffset
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struct nvsp_1_receive_buffer_section sections[1];
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} __attribute__((packed));
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* This message is sent by the VSC to revoke the receive buffer. After the VSP
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* completes this transaction, the vsp should never use the receive buffer
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struct nvsp_1_message_revoke_receive_buffer {
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* This message is used by the VSC to send a send buffer to the VSP. The VSC
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* can then use the send buffer to send data to the VSP.
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struct nvsp_1_message_send_send_buffer {
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} __attribute__((packed));
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* This message is used by the VSP to acknowledge a send buffer sent by the
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* VSC. This message must be sent by the VSP before the VSP uses the sent
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struct nvsp_1_message_send_send_buffer_complete {
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* The VSC gets to choose the size of the send buffer and the VSP gets
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* to choose the sections size of the buffer. This was done to enable
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* dynamic reconfigurations when the cost of GPA-direct buffers
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} __attribute__((packed));
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* This message is sent by the VSC to revoke the send buffer. After the VSP
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* completes this transaction, the vsp should never use the send buffer again.
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struct nvsp_1_message_revoke_send_buffer {
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* This message is used by both the VSP and the VSC to send a RNDIS message to
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* the opposite channel endpoint.
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struct nvsp_1_message_send_rndis_packet {
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* This field is specified by RNIDS. They assume there's two different
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* channels of communication. However, the Network VSP only has one.
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* Therefore, the channel travels with the RNDIS packet.
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* This field is used to send part or all of the data through a send
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* buffer. This values specifies an index into the send buffer. If the
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* index is 0xFFFFFFFF, then the send buffer is not being used and all
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* of the data was sent through other VMBus mechanisms.
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u32 send_buf_section_index;
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u32 send_buf_section_size;
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} __attribute__((packed));
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* This message is used by both the VSP and the VSC to complete a RNDIS message
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* to the opposite channel endpoint. At this point, the initiator of this
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* message cannot use any resources associated with the original RNDIS packet.
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struct nvsp_1_message_send_rndis_packet_complete {
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union nvsp_1_message_uber {
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struct nvsp_1_message_send_ndis_version send_ndis_ver;
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struct nvsp_1_message_send_receive_buffer send_recv_buf;
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struct nvsp_1_message_send_receive_buffer_complete
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send_recv_buf_complete;
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struct nvsp_1_message_revoke_receive_buffer revoke_recv_buf;
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struct nvsp_1_message_send_send_buffer send_send_buf;
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struct nvsp_1_message_send_send_buffer_complete send_send_buf_complete;
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struct nvsp_1_message_revoke_send_buffer revoke_send_buf;
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struct nvsp_1_message_send_rndis_packet send_rndis_pkt;
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struct nvsp_1_message_send_rndis_packet_complete
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send_rndis_pkt_complete;
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} __attribute__((packed));
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union nvsp_all_messages {
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union nvsp_message_init_uber init_msg;
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union nvsp_1_message_uber v1_msg;
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} __attribute__((packed));
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struct nvsp_message {
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struct nvsp_message_header hdr;
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union nvsp_all_messages msg;
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} __attribute__((packed));
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/* #define NVSC_MIN_PROTOCOL_VERSION 1 */
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/* #define NVSC_MAX_PROTOCOL_VERSION 1 */
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#define NETVSC_SEND_BUFFER_SIZE (64*1024) /* 64K */
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#define NETVSC_SEND_BUFFER_ID 0xface
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#define NETVSC_RECEIVE_BUFFER_SIZE (1024*1024) /* 1MB */
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#define NETVSC_RECEIVE_BUFFER_ID 0xcafe
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#define NETVSC_RECEIVE_SG_COUNT 1
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/* Preallocated receive packets */
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#define NETVSC_RECEIVE_PACKETLIST_COUNT 256
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#define NETVSC_PACKET_SIZE 2048
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/* Per netvsc channel-specific */
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struct netvsc_device {
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struct hv_device *dev;
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atomic_t num_outstanding_sends;
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* List of free preallocated hv_netvsc_packet to represent receive
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struct list_head recv_pkt_list;
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spinlock_t recv_pkt_list_lock;
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/* Send buffer allocated by us but manages by NetVSP */
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u32 send_buf_gpadl_handle;
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u32 send_section_size;
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/* Receive buffer allocated by us but manages by NetVSP */
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u32 recv_buf_gpadl_handle;
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u32 recv_section_cnt;
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struct nvsp_1_receive_buffer_section *recv_section;
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/* Used for NetVSP initialization protocol */
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struct osd_waitevent *channel_init_event;
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struct nvsp_message channel_init_pkt;
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struct nvsp_message revoke_packet;
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/* unsigned char HwMacAddr[HW_MACADDR_LEN]; */
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/* Holds rndis device info */
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#endif /* _NETVSC_H_ */