text: /*
   *
   * Copyright (c) 2011, Microsoft Corporation.
   *
   * This program is free software; you can redistribute it and/or modify it
   * under the terms and conditions of the GNU General Public License,
   * version 2, as published by the Free Software Foundation.
   *
   * This program is distributed in the hope it will be useful, but WITHOUT
   * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
   * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
   * more details.
   *
   * You should have received a copy of the GNU General Public License along with
   * this program; if not, see <http://www.gnu.org/licenses/>.
   *
   * Authors:
   *   Haiyang Zhang <haiyangz@microsoft.com>
   *   Hank Janssen  <hjanssen@microsoft.com>
   *   K. Y. Srinivasan <kys@microsoft.com>
   *
   */
  
  #ifndef _HYPERV_NET_H
  #define _HYPERV_NET_H
  
  #include <linux/list.h>
  #include <linux/hyperv.h>
  #include <linux/rndis.h>
  
  /* RSS related */
  #define OID_GEN_RECEIVE_SCALE_CAPABILITIES 0x00010203  /* query only */
  #define OID_GEN_RECEIVE_SCALE_PARAMETERS 0x00010204  /* query and set */
  
  #define NDIS_OBJECT_TYPE_RSS_CAPABILITIES 0x88
  #define NDIS_OBJECT_TYPE_RSS_PARAMETERS 0x89
  #define NDIS_OBJECT_TYPE_OFFLOAD	0xa7
  
  #define NDIS_RECEIVE_SCALE_CAPABILITIES_REVISION_2 2
  #define NDIS_RECEIVE_SCALE_PARAMETERS_REVISION_2 2
  
  struct ndis_obj_header {
  	u8 type;
  	u8 rev;
  	u16 size;
  } __packed;
  
  /* ndis_recv_scale_cap/cap_flag */
  #define NDIS_RSS_CAPS_MESSAGE_SIGNALED_INTERRUPTS 0x01000000
  #define NDIS_RSS_CAPS_CLASSIFICATION_AT_ISR       0x02000000
  #define NDIS_RSS_CAPS_CLASSIFICATION_AT_DPC       0x04000000
  #define NDIS_RSS_CAPS_USING_MSI_X                 0x08000000
  #define NDIS_RSS_CAPS_RSS_AVAILABLE_ON_PORTS      0x10000000
  #define NDIS_RSS_CAPS_SUPPORTS_MSI_X              0x20000000
  #define NDIS_RSS_CAPS_HASH_TYPE_TCP_IPV4          0x00000100
  #define NDIS_RSS_CAPS_HASH_TYPE_TCP_IPV6          0x00000200
  #define NDIS_RSS_CAPS_HASH_TYPE_TCP_IPV6_EX       0x00000400
  
  struct ndis_recv_scale_cap { /* NDIS_RECEIVE_SCALE_CAPABILITIES */
  	struct ndis_obj_header hdr;
  	u32 cap_flag;
  	u32 num_int_msg;
  	u32 num_recv_que;
  	u16 num_indirect_tabent;
  } __packed;
  
  
  /* ndis_recv_scale_param flags */
  #define NDIS_RSS_PARAM_FLAG_BASE_CPU_UNCHANGED     0x0001
  #define NDIS_RSS_PARAM_FLAG_HASH_INFO_UNCHANGED    0x0002
  #define NDIS_RSS_PARAM_FLAG_ITABLE_UNCHANGED       0x0004
  #define NDIS_RSS_PARAM_FLAG_HASH_KEY_UNCHANGED     0x0008
  #define NDIS_RSS_PARAM_FLAG_DISABLE_RSS            0x0010
  
  /* Hash info bits */
  #define NDIS_HASH_FUNC_TOEPLITZ 0x00000001
  #define NDIS_HASH_IPV4          0x00000100
  #define NDIS_HASH_TCP_IPV4      0x00000200
  #define NDIS_HASH_IPV6          0x00000400
  #define NDIS_HASH_IPV6_EX       0x00000800
  #define NDIS_HASH_TCP_IPV6      0x00001000
  #define NDIS_HASH_TCP_IPV6_EX   0x00002000
  
  #define NDIS_RSS_INDIRECTION_TABLE_MAX_SIZE_REVISION_2 (128 * 4)
  #define NDIS_RSS_HASH_SECRET_KEY_MAX_SIZE_REVISION_2   40
  
  #define ITAB_NUM 128
  
  struct ndis_recv_scale_param { /* NDIS_RECEIVE_SCALE_PARAMETERS */
  	struct ndis_obj_header hdr;
  
  	/* Qualifies the rest of the information */
  	u16 flag;
  
  	/* The base CPU number to do receive processing. not used */
  	u16 base_cpu_number;
  
  	/* This describes the hash function and type being enabled */
  	u32 hashinfo;
  
  	/* The size of indirection table array */
  	u16 indirect_tabsize;
  
  	/* The offset of the indirection table from the beginning of this
  	 * structure
  	 */
  	u32 indirect_taboffset;
  
  	/* The size of the hash secret key */
  	u16 hashkey_size;
  
  	/* The offset of the secret key from the beginning of this structure */
  	u32 kashkey_offset;
  
  	u32 processor_masks_offset;
  	u32 num_processor_masks;
  	u32 processor_masks_entry_size;
  };
  
  /* Fwd declaration */
  struct ndis_tcp_ip_checksum_info;
  struct ndis_pkt_8021q_info;
  
  /*
   * Represent netvsc packet which contains 1 RNDIS and 1 ethernet frame
   * within the RNDIS
   *
   * The size of this structure is less than 48 bytes and we can now
   * place this structure in the skb->cb field.
   */
  struct hv_netvsc_packet {
  	/* Bookkeeping stuff */
  	u8 cp_partial; /* partial copy into send buffer */
  
  	u8 rmsg_size; /* RNDIS header and PPI size */
  	u8 rmsg_pgcnt; /* page count of RNDIS header and PPI */
  	u8 page_buf_cnt;
  
  	u16 q_idx;
  	u16 total_packets;
  
  	u32 total_bytes;
  	u32 send_buf_index;
  	u32 total_data_buflen;
  };
  
  struct netvsc_device_info {
  	unsigned char mac_adr[ETH_ALEN];
  	int  ring_size;
  	u32  num_chn;
  	u32  send_sections;
  	u32  recv_sections;
  	u32  send_section_size;
  	u32  recv_section_size;
  };
  
  enum rndis_device_state {
  	RNDIS_DEV_UNINITIALIZED = 0,
  	RNDIS_DEV_INITIALIZING,
  	RNDIS_DEV_INITIALIZED,
  	RNDIS_DEV_DATAINITIALIZED,
  };
  
  #define NETVSC_HASH_KEYLEN 40
  
  struct rndis_device {
  	struct net_device *ndev;
  
  	enum rndis_device_state state;
  
  	atomic_t new_req_id;
  
  	spinlock_t request_lock;
  	struct list_head req_list;
  
  	struct work_struct mcast_work;
  
  	bool link_state;        /* 0 - link up, 1 - link down */
  
  	u8 hw_mac_adr[ETH_ALEN];
  	u8 rss_key[NETVSC_HASH_KEYLEN];
  	u16 rx_table[ITAB_NUM];
  };
  
  
  /* Interface */
  struct rndis_message;
  struct netvsc_device;
  struct net_device_context;
  
  struct netvsc_device *netvsc_device_add(struct hv_device *device,
  					const struct netvsc_device_info *info);
  int netvsc_alloc_recv_comp_ring(struct netvsc_device *net_device, u32 q_idx);
  void netvsc_device_remove(struct hv_device *device);
  int netvsc_send(struct net_device *net,
  		struct hv_netvsc_packet *packet,
  		struct rndis_message *rndis_msg,
  		struct hv_page_buffer *page_buffer,
  		struct sk_buff *skb);
  void netvsc_linkstatus_callback(struct hv_device *device_obj,
  				struct rndis_message *resp);
  int netvsc_recv_callback(struct net_device *net,
  			 struct vmbus_channel *channel,
  			 void  *data, u32 len,
  			 const struct ndis_tcp_ip_checksum_info *csum_info,
  			 const struct ndis_pkt_8021q_info *vlan);
  void netvsc_channel_cb(void *context);
  int netvsc_poll(struct napi_struct *napi, int budget);
  
  int rndis_set_subchannel(struct net_device *ndev, struct netvsc_device *nvdev);
  int rndis_filter_open(struct netvsc_device *nvdev);
  int rndis_filter_close(struct netvsc_device *nvdev);
  struct netvsc_device *rndis_filter_device_add(struct hv_device *dev,
  					      struct netvsc_device_info *info);
  void rndis_filter_update(struct netvsc_device *nvdev);
  void rndis_filter_device_remove(struct hv_device *dev,
  				struct netvsc_device *nvdev);
  int rndis_filter_set_rss_param(struct rndis_device *rdev,
  			       const u8 *key);
  int rndis_filter_receive(struct net_device *ndev,
  			 struct netvsc_device *net_dev,
  			 struct hv_device *dev,
  			 struct vmbus_channel *channel,
  			 void *data, u32 buflen);
  
  int rndis_filter_set_device_mac(struct netvsc_device *ndev,
  				const char *mac);
  
  void netvsc_switch_datapath(struct net_device *nv_dev, bool vf);
  
  #define NVSP_INVALID_PROTOCOL_VERSION	((u32)0xFFFFFFFF)
  
  #define NVSP_PROTOCOL_VERSION_1		2
  #define NVSP_PROTOCOL_VERSION_2		0x30002
  #define NVSP_PROTOCOL_VERSION_4		0x40000
  #define NVSP_PROTOCOL_VERSION_5		0x50000
  
  enum {
  	NVSP_MSG_TYPE_NONE = 0,
  
  	/* Init Messages */
  	NVSP_MSG_TYPE_INIT			= 1,
  	NVSP_MSG_TYPE_INIT_COMPLETE		= 2,
  
  	NVSP_VERSION_MSG_START			= 100,
  
  	/* Version 1 Messages */
  	NVSP_MSG1_TYPE_SEND_NDIS_VER		= NVSP_VERSION_MSG_START,
  
  	NVSP_MSG1_TYPE_SEND_RECV_BUF,
  	NVSP_MSG1_TYPE_SEND_RECV_BUF_COMPLETE,
  	NVSP_MSG1_TYPE_REVOKE_RECV_BUF,
  
  	NVSP_MSG1_TYPE_SEND_SEND_BUF,
  	NVSP_MSG1_TYPE_SEND_SEND_BUF_COMPLETE,
  	NVSP_MSG1_TYPE_REVOKE_SEND_BUF,
  
  	NVSP_MSG1_TYPE_SEND_RNDIS_PKT,
  	NVSP_MSG1_TYPE_SEND_RNDIS_PKT_COMPLETE,
  
  	/* Version 2 messages */
  	NVSP_MSG2_TYPE_SEND_CHIMNEY_DELEGATED_BUF,
  	NVSP_MSG2_TYPE_SEND_CHIMNEY_DELEGATED_BUF_COMP,
  	NVSP_MSG2_TYPE_REVOKE_CHIMNEY_DELEGATED_BUF,
  
  	NVSP_MSG2_TYPE_RESUME_CHIMNEY_RX_INDICATION,
  
  	NVSP_MSG2_TYPE_TERMINATE_CHIMNEY,
  	NVSP_MSG2_TYPE_TERMINATE_CHIMNEY_COMP,
  
  	NVSP_MSG2_TYPE_INDICATE_CHIMNEY_EVENT,
  
  	NVSP_MSG2_TYPE_SEND_CHIMNEY_PKT,
  	NVSP_MSG2_TYPE_SEND_CHIMNEY_PKT_COMP,
  
  	NVSP_MSG2_TYPE_POST_CHIMNEY_RECV_REQ,
  	NVSP_MSG2_TYPE_POST_CHIMNEY_RECV_REQ_COMP,
  
  	NVSP_MSG2_TYPE_ALLOC_RXBUF,
  	NVSP_MSG2_TYPE_ALLOC_RXBUF_COMP,
  
  	NVSP_MSG2_TYPE_FREE_RXBUF,
  
  	NVSP_MSG2_TYPE_SEND_VMQ_RNDIS_PKT,
  	NVSP_MSG2_TYPE_SEND_VMQ_RNDIS_PKT_COMP,
  
  	NVSP_MSG2_TYPE_SEND_NDIS_CONFIG,
  
  	NVSP_MSG2_TYPE_ALLOC_CHIMNEY_HANDLE,
  	NVSP_MSG2_TYPE_ALLOC_CHIMNEY_HANDLE_COMP,
  
  	NVSP_MSG2_MAX = NVSP_MSG2_TYPE_ALLOC_CHIMNEY_HANDLE_COMP,
  
  	/* Version 4 messages */
  	NVSP_MSG4_TYPE_SEND_VF_ASSOCIATION,
  	NVSP_MSG4_TYPE_SWITCH_DATA_PATH,
  	NVSP_MSG4_TYPE_UPLINK_CONNECT_STATE_DEPRECATED,
  
  	NVSP_MSG4_MAX = NVSP_MSG4_TYPE_UPLINK_CONNECT_STATE_DEPRECATED,
  
  	/* Version 5 messages */
  	NVSP_MSG5_TYPE_OID_QUERY_EX,
  	NVSP_MSG5_TYPE_OID_QUERY_EX_COMP,
  	NVSP_MSG5_TYPE_SUBCHANNEL,
  	NVSP_MSG5_TYPE_SEND_INDIRECTION_TABLE,
  
  	NVSP_MSG5_MAX = NVSP_MSG5_TYPE_SEND_INDIRECTION_TABLE,
  };
  
  enum {
  	NVSP_STAT_NONE = 0,
  	NVSP_STAT_SUCCESS,
  	NVSP_STAT_FAIL,
  	NVSP_STAT_PROTOCOL_TOO_NEW,
  	NVSP_STAT_PROTOCOL_TOO_OLD,
  	NVSP_STAT_INVALID_RNDIS_PKT,
  	NVSP_STAT_BUSY,
  	NVSP_STAT_PROTOCOL_UNSUPPORTED,
  	NVSP_STAT_MAX,
  };
  
  struct nvsp_message_header {
  	u32 msg_type;
  };
  
  /* Init Messages */
  
  /*
   * This message is used by the VSC to initialize the channel after the channels
   * has been opened. This message should never include anything other then
   * versioning (i.e. this message will be the same for ever).
   */
  struct nvsp_message_init {
  	u32 min_protocol_ver;
  	u32 max_protocol_ver;
  } __packed;
  
  /*
   * This message is used by the VSP to complete the initialization of the
   * channel. This message should never include anything other then versioning
   * (i.e. this message will be the same for ever).
   */
  struct nvsp_message_init_complete {
  	u32 negotiated_protocol_ver;
  	u32 max_mdl_chain_len;
  	u32 status;
  } __packed;
  
  union nvsp_message_init_uber {
  	struct nvsp_message_init init;
  	struct nvsp_message_init_complete init_complete;
  } __packed;
  
  /* Version 1 Messages */
  
  /*
   * This message is used by the VSC to send the NDIS version to the VSP. The VSP
   * can use this information when handling OIDs sent by the VSC.
   */
  struct nvsp_1_message_send_ndis_version {
  	u32 ndis_major_ver;
  	u32 ndis_minor_ver;
  } __packed;
  
  /*
   * This message is used by the VSC to send a receive buffer to the VSP. The VSP
   * can then use the receive buffer to send data to the VSC.
   */
  struct nvsp_1_message_send_receive_buffer {
  	u32 gpadl_handle;
  	u16 id;
  } __packed;
  
  struct nvsp_1_receive_buffer_section {
  	u32 offset;
  	u32 sub_alloc_size;
  	u32 num_sub_allocs;
  	u32 end_offset;
  } __packed;
  
  /*
   * This message is used by the VSP to acknowledge a receive buffer send by the
   * VSC. This message must be sent by the VSP before the VSP uses the receive
   * buffer.
   */
  struct nvsp_1_message_send_receive_buffer_complete {
  	u32 status;
  	u32 num_sections;
  
  	/*
  	 * The receive buffer is split into two parts, a large suballocation
  	 * section and a small suballocation section. These sections are then
  	 * suballocated by a certain size.
  	 */
  
  	/*
  	 * For example, the following break up of the receive buffer has 6
  	 * large suballocations and 10 small suballocations.
  	 */
  
  	/*
  	 * |            Large Section          |  |   Small Section   |
  	 * ------------------------------------------------------------
  	 * |     |     |     |     |     |     |  | | | | | | | | | | |
  	 * |                                      |
  	 *  LargeOffset                            SmallOffset
  	 */
  
  	struct nvsp_1_receive_buffer_section sections[1];
  } __packed;
  
  /*
   * This message is sent by the VSC to revoke the receive buffer.  After the VSP
   * completes this transaction, the vsp should never use the receive buffer
   * again.
   */
  struct nvsp_1_message_revoke_receive_buffer {
  	u16 id;
  };
  
  /*
   * This message is used by the VSC to send a send buffer to the VSP. The VSC
   * can then use the send buffer to send data to the VSP.
   */
  struct nvsp_1_message_send_send_buffer {
  	u32 gpadl_handle;
  	u16 id;
  } __packed;
  
  /*
   * This message is used by the VSP to acknowledge a send buffer sent by the
   * VSC. This message must be sent by the VSP before the VSP uses the sent
   * buffer.
   */
  struct nvsp_1_message_send_send_buffer_complete {
  	u32 status;
  
  	/*
  	 * The VSC gets to choose the size of the send buffer and the VSP gets
  	 * to choose the sections size of the buffer.  This was done to enable
  	 * dynamic reconfigurations when the cost of GPA-direct buffers
  	 * decreases.
  	 */
  	u32 section_size;
  } __packed;
  
  /*
   * This message is sent by the VSC to revoke the send buffer.  After the VSP
   * completes this transaction, the vsp should never use the send buffer again.
   */
  struct nvsp_1_message_revoke_send_buffer {
  	u16 id;
  };
  
  /*
   * This message is used by both the VSP and the VSC to send a RNDIS message to
   * the opposite channel endpoint.
   */
  struct nvsp_1_message_send_rndis_packet {
  	/*
  	 * This field is specified by RNDIS. They assume there's two different
  	 * channels of communication. However, the Network VSP only has one.
  	 * Therefore, the channel travels with the RNDIS packet.
  	 */
  	u32 channel_type;
  
  	/*
  	 * This field is used to send part or all of the data through a send
  	 * buffer. This values specifies an index into the send buffer. If the
  	 * index is 0xFFFFFFFF, then the send buffer is not being used and all
  	 * of the data was sent through other VMBus mechanisms.
  	 */
  	u32 send_buf_section_index;
  	u32 send_buf_section_size;
  } __packed;
  
  /*
   * This message is used by both the VSP and the VSC to complete a RNDIS message
   * to the opposite channel endpoint. At this point, the initiator of this
   * message cannot use any resources associated with the original RNDIS packet.
   */
  struct nvsp_1_message_send_rndis_packet_complete {
  	u32 status;
  };
  
  union nvsp_1_message_uber {
  	struct nvsp_1_message_send_ndis_version send_ndis_ver;
  
  	struct nvsp_1_message_send_receive_buffer send_recv_buf;
  	struct nvsp_1_message_send_receive_buffer_complete
  						send_recv_buf_complete;
  	struct nvsp_1_message_revoke_receive_buffer revoke_recv_buf;
  
  	struct nvsp_1_message_send_send_buffer send_send_buf;
  	struct nvsp_1_message_send_send_buffer_complete send_send_buf_complete;
  	struct nvsp_1_message_revoke_send_buffer revoke_send_buf;
  
  	struct nvsp_1_message_send_rndis_packet send_rndis_pkt;
  	struct nvsp_1_message_send_rndis_packet_complete
  						send_rndis_pkt_complete;
  } __packed;
  
  
  /*
   * Network VSP protocol version 2 messages:
   */
  struct nvsp_2_vsc_capability {
  	union {
  		u64 data;
  		struct {
  			u64 vmq:1;
  			u64 chimney:1;
  			u64 sriov:1;
  			u64 ieee8021q:1;
  			u64 correlation_id:1;
  			u64 teaming:1;
  		};
  	};
  } __packed;
  
  struct nvsp_2_send_ndis_config {
  	u32 mtu;
  	u32 reserved;
  	struct nvsp_2_vsc_capability capability;
  } __packed;
  
  /* Allocate receive buffer */
  struct nvsp_2_alloc_rxbuf {
  	/* Allocation ID to match the allocation request and response */
  	u32 alloc_id;
  
  	/* Length of the VM shared memory receive buffer that needs to
  	 * be allocated
  	 */
  	u32 len;
  } __packed;
  
  /* Allocate receive buffer complete */
  struct nvsp_2_alloc_rxbuf_comp {
  	/* The NDIS_STATUS code for buffer allocation */
  	u32 status;
  
  	u32 alloc_id;
  
  	/* GPADL handle for the allocated receive buffer */
  	u32 gpadl_handle;
  
  	/* Receive buffer ID */
  	u64 recv_buf_id;
  } __packed;
  
  struct nvsp_2_free_rxbuf {
  	u64 recv_buf_id;
  } __packed;
  
  union nvsp_2_message_uber {
  	struct nvsp_2_send_ndis_config send_ndis_config;
  	struct nvsp_2_alloc_rxbuf alloc_rxbuf;
  	struct nvsp_2_alloc_rxbuf_comp alloc_rxbuf_comp;
  	struct nvsp_2_free_rxbuf free_rxbuf;
  } __packed;
  
  struct nvsp_4_send_vf_association {
  	/* 1: allocated, serial number is valid. 0: not allocated */
  	u32 allocated;
  
  	/* Serial number of the VF to team with */
  	u32 serial;
  } __packed;
  
  enum nvsp_vm_datapath {
  	NVSP_DATAPATH_SYNTHETIC = 0,
  	NVSP_DATAPATH_VF,
  	NVSP_DATAPATH_MAX
  };
  
  struct nvsp_4_sw_datapath {
  	u32 active_datapath; /* active data path in VM */
  } __packed;
  
  union nvsp_4_message_uber {
  	struct nvsp_4_send_vf_association vf_assoc;
  	struct nvsp_4_sw_datapath active_dp;
  } __packed;
  
  enum nvsp_subchannel_operation {
  	NVSP_SUBCHANNEL_NONE = 0,
  	NVSP_SUBCHANNEL_ALLOCATE,
  	NVSP_SUBCHANNEL_MAX
  };
  
  struct nvsp_5_subchannel_request {
  	u32 op;
  	u32 num_subchannels;
  } __packed;
  
  struct nvsp_5_subchannel_complete {
  	u32 status;
  	u32 num_subchannels; /* Actual number of subchannels allocated */
  } __packed;
  
  struct nvsp_5_send_indirect_table {
  	/* The number of entries in the send indirection table */
  	u32 count;
  
  	/* The offset of the send indirection table from top of this struct.
  	 * The send indirection table tells which channel to put the send
  	 * traffic on. Each entry is a channel number.
  	 */
  	u32 offset;
  } __packed;
  
  union nvsp_5_message_uber {
  	struct nvsp_5_subchannel_request subchn_req;
  	struct nvsp_5_subchannel_complete subchn_comp;
  	struct nvsp_5_send_indirect_table send_table;
  } __packed;
  
  union nvsp_all_messages {
  	union nvsp_message_init_uber init_msg;
  	union nvsp_1_message_uber v1_msg;
  	union nvsp_2_message_uber v2_msg;
  	union nvsp_4_message_uber v4_msg;
  	union nvsp_5_message_uber v5_msg;
  } __packed;
  
  /* ALL Messages */
  struct nvsp_message {
  	struct nvsp_message_header hdr;
  	union nvsp_all_messages msg;
  } __packed;
  
  
  #define NETVSC_MTU 65535
  #define NETVSC_MTU_MIN ETH_MIN_MTU
  
  /* Max buffer sizes allowed by a host */
  #define NETVSC_RECEIVE_BUFFER_SIZE		(1024 * 1024 * 31) /* 31MB */
  #define NETVSC_RECEIVE_BUFFER_SIZE_LEGACY	(1024 * 1024 * 15) /* 15MB */
  #define NETVSC_RECEIVE_BUFFER_DEFAULT		(1024 * 1024 * 16)
  
  #define NETVSC_SEND_BUFFER_SIZE			(1024 * 1024 * 15)  /* 15MB */
  #define NETVSC_SEND_BUFFER_DEFAULT		(1024 * 1024)
  
  #define NETVSC_INVALID_INDEX			-1
  
  #define NETVSC_SEND_SECTION_SIZE		6144
  #define NETVSC_RECV_SECTION_SIZE		1728
  
  /* Default size of TX buf: 1MB, RX buf: 16MB */
  #define NETVSC_MIN_TX_SECTIONS	10
  #define NETVSC_DEFAULT_TX	(NETVSC_SEND_BUFFER_DEFAULT \
  				 / NETVSC_SEND_SECTION_SIZE)
  #define NETVSC_MIN_RX_SECTIONS	10
  #define NETVSC_DEFAULT_RX	(NETVSC_RECEIVE_BUFFER_DEFAULT \
  				 / NETVSC_RECV_SECTION_SIZE)
  
  #define NETVSC_RECEIVE_BUFFER_ID		0xcafe
  #define NETVSC_SEND_BUFFER_ID			0
  
  #define NETVSC_SUPPORTED_HW_FEATURES (NETIF_F_RXCSUM | NETIF_F_IP_CSUM | \
  				      NETIF_F_TSO | NETIF_F_IPV6_CSUM | \
  				      NETIF_F_TSO6)
  
  #define VRSS_SEND_TAB_SIZE 16  /* must be power of 2 */
  #define VRSS_CHANNEL_MAX 64
  #define VRSS_CHANNEL_DEFAULT 8
  
  #define RNDIS_MAX_PKT_DEFAULT 8
  #define RNDIS_PKT_ALIGN_DEFAULT 8
  
  struct multi_send_data {
  	struct sk_buff *skb; /* skb containing the pkt */
  	struct hv_netvsc_packet *pkt; /* netvsc pkt pending */
  	u32 count; /* counter of batched packets */
  };
  
  struct recv_comp_data {
  	u64 tid; /* transaction id */
  	u32 status;
  };
  
  struct multi_recv_comp {
  	struct recv_comp_data *slots;
  	u32 first;	/* first data entry */
  	u32 next;	/* next entry for writing */
  };
  
  struct netvsc_stats {
  	u64 packets;
  	u64 bytes;
  	u64 broadcast;
  	u64 multicast;
  	struct u64_stats_sync syncp;
  };
  
  struct netvsc_ethtool_stats {
  	unsigned long tx_scattered;
  	unsigned long tx_no_memory;
  	unsigned long tx_no_space;
  	unsigned long tx_too_big;
  	unsigned long tx_busy;
  	unsigned long tx_send_full;
  	unsigned long rx_comp_busy;
  };
  
  struct netvsc_vf_pcpu_stats {
  	u64     rx_packets;
  	u64     rx_bytes;
  	u64     tx_packets;
  	u64     tx_bytes;
  	struct u64_stats_sync   syncp;
  	u32	tx_dropped;
  };
  
  struct netvsc_reconfig {
  	struct list_head list;
  	u32 event;
  };
  
  /* The context of the netvsc device  */
  struct net_device_context {
  	/* point back to our device context */
  	struct hv_device *device_ctx;
  	/* netvsc_device */
  	struct netvsc_device __rcu *nvdev;
  	/* list of netvsc net_devices */
  	struct list_head list;
  	/* reconfigure work */
  	struct delayed_work dwork;
  	/* last reconfig time */
  	unsigned long last_reconfig;
  	/* reconfig events */
  	struct list_head reconfig_events;
  	/* list protection */
  	spinlock_t lock;
  
  	u32 msg_enable; /* debug level */
  
  	u32 tx_checksum_mask;
  
  	u32 tx_table[VRSS_SEND_TAB_SIZE];
  
  	/* Ethtool settings */
  	bool udp4_l4_hash;
  	bool udp6_l4_hash;
  	u8 duplex;
  	u32 speed;
  	struct netvsc_ethtool_stats eth_stats;
  
  	/* State to manage the associated VF interface. */
  	struct net_device __rcu *vf_netdev;
  	struct netvsc_vf_pcpu_stats __percpu *vf_stats;
  	struct delayed_work vf_takeover;
  
  	/* 1: allocated, serial number is valid. 0: not allocated */
  	u32 vf_alloc;
  	/* Serial number of the VF to team with */
  	u32 vf_serial;
  };
  
  /* Per channel data */
  struct netvsc_channel {
  	struct vmbus_channel *channel;
  	struct netvsc_device *net_device;
  	const struct vmpacket_descriptor *desc;
  	struct napi_struct napi;
  	struct multi_send_data msd;
  	struct multi_recv_comp mrc;
  	atomic_t queue_sends;
  
  	struct netvsc_stats tx_stats;
  	struct netvsc_stats rx_stats;
  };
  
  /* Per netvsc device */
  struct netvsc_device {
  	u32 nvsp_version;
  
  	wait_queue_head_t wait_drain;
  	bool destroy;
  	bool tx_disable; /* if true, do not wake up queue again */
  
  	/* Receive buffer allocated by us but manages by NetVSP */
  	void *recv_buf;
  	u32 recv_buf_gpadl_handle;
  	u32 recv_section_cnt;
  	u32 recv_section_size;
  	u32 recv_completion_cnt;
  
  	/* Send buffer allocated by us */
  	void *send_buf;
  	u32 send_buf_gpadl_handle;
  	u32 send_section_cnt;
  	u32 send_section_size;
  	unsigned long *send_section_map;
  
  	/* Used for NetVSP initialization protocol */
  	struct completion channel_init_wait;
  	struct nvsp_message channel_init_pkt;
  
  	struct nvsp_message revoke_packet;
  
  	u32 max_chn;
  	u32 num_chn;
  
  	atomic_t open_chn;
  	struct work_struct subchan_work;
  	wait_queue_head_t subchan_open;
  
  	struct rndis_device *extension;
  
  	int ring_size;
  
  	u32 max_pkt; /* max number of pkt in one send, e.g. 8 */
  	u32 pkt_align; /* alignment bytes, e.g. 8 */
  
  	atomic_t open_cnt;
  
  	struct netvsc_channel chan_table[VRSS_CHANNEL_MAX];
  
  	struct rcu_head rcu;
  };
  
  /* NdisInitialize message */
  struct rndis_initialize_request {
  	u32 req_id;
  	u32 major_ver;
  	u32 minor_ver;
  	u32 max_xfer_size;
  };
  
  /* Response to NdisInitialize */
  struct rndis_initialize_complete {
  	u32 req_id;
  	u32 status;
  	u32 major_ver;
  	u32 minor_ver;
  	u32 dev_flags;
  	u32 medium;
  	u32 max_pkt_per_msg;
  	u32 max_xfer_size;
  	u32 pkt_alignment_factor;
  	u32 af_list_offset;
  	u32 af_list_size;
  };
  
  /* Call manager devices only: Information about an address family */
  /* supported by the device is appended to the response to NdisInitialize. */
  struct rndis_co_address_family {
  	u32 address_family;
  	u32 major_ver;
  	u32 minor_ver;
  };
  
  /* NdisHalt message */
  struct rndis_halt_request {
  	u32 req_id;
  };
  
  /* NdisQueryRequest message */
  struct rndis_query_request {
  	u32 req_id;
  	u32 oid;
  	u32 info_buflen;
  	u32 info_buf_offset;
  	u32 dev_vc_handle;
  };
  
  /* Response to NdisQueryRequest */
  struct rndis_query_complete {
  	u32 req_id;
  	u32 status;
  	u32 info_buflen;
  	u32 info_buf_offset;
  };
  
  /* NdisSetRequest message */
  struct rndis_set_request {
  	u32 req_id;
  	u32 oid;
  	u32 info_buflen;
  	u32 info_buf_offset;
  	u32 dev_vc_handle;
  };
  
  /* Response to NdisSetRequest */
  struct rndis_set_complete {
  	u32 req_id;
  	u32 status;
  };
  
  /* NdisReset message */
  struct rndis_reset_request {
  	u32 reserved;
  };
  
  /* Response to NdisReset */
  struct rndis_reset_complete {
  	u32 status;
  	u32 addressing_reset;
  };
  
  /* NdisMIndicateStatus message */
  struct rndis_indicate_status {
  	u32 status;
  	u32 status_buflen;
  	u32 status_buf_offset;
  };
  
  /* Diagnostic information passed as the status buffer in */
  /* struct rndis_indicate_status messages signifying error conditions. */
  struct rndis_diagnostic_info {
  	u32 diag_status;
  	u32 error_offset;
  };
  
  /* NdisKeepAlive message */
  struct rndis_keepalive_request {
  	u32 req_id;
  };
  
  /* Response to NdisKeepAlive */
  struct rndis_keepalive_complete {
  	u32 req_id;
  	u32 status;
  };
  
  /*
   * Data message. All Offset fields contain byte offsets from the beginning of
   * struct rndis_packet. All Length fields are in bytes.  VcHandle is set
   * to 0 for connectionless data, otherwise it contains the VC handle.
   */
  struct rndis_packet {
  	u32 data_offset;
  	u32 data_len;
  	u32 oob_data_offset;
  	u32 oob_data_len;
  	u32 num_oob_data_elements;
  	u32 per_pkt_info_offset;
  	u32 per_pkt_info_len;
  	u32 vc_handle;
  	u32 reserved;
  };
  
  /* Optional Out of Band data associated with a Data message. */
  struct rndis_oobd {
  	u32 size;
  	u32 type;
  	u32 class_info_offset;
  };
  
  /* Packet extension field contents associated with a Data message. */
  struct rndis_per_packet_info {
  	u32 size;
  	u32 type;
  	u32 ppi_offset;
  };
  
  enum ndis_per_pkt_info_type {
  	TCPIP_CHKSUM_PKTINFO,
  	IPSEC_PKTINFO,
  	TCP_LARGESEND_PKTINFO,
  	CLASSIFICATION_HANDLE_PKTINFO,
  	NDIS_RESERVED,
  	SG_LIST_PKTINFO,
  	IEEE_8021Q_INFO,
  	ORIGINAL_PKTINFO,
  	PACKET_CANCEL_ID,
  	NBL_HASH_VALUE = PACKET_CANCEL_ID,
  	ORIGINAL_NET_BUFLIST,
  	CACHED_NET_BUFLIST,
  	SHORT_PKT_PADINFO,
  	MAX_PER_PKT_INFO
  };
  
  struct ndis_pkt_8021q_info {
  	union {
  		struct {
  			u32 pri:3; /* User Priority */
  			u32 cfi:1; /* Canonical Format ID */
  			u32 vlanid:12; /* VLAN ID */
  			u32 reserved:16;
  		};
  		u32 value;
  	};
  };
  
  struct ndis_object_header {
  	u8 type;
  	u8 revision;
  	u16 size;
  };
  
  #define NDIS_OBJECT_TYPE_DEFAULT	0x80
  #define NDIS_OFFLOAD_PARAMETERS_REVISION_3 3
  #define NDIS_OFFLOAD_PARAMETERS_REVISION_2 2
  #define NDIS_OFFLOAD_PARAMETERS_REVISION_1 1
  
  #define NDIS_OFFLOAD_PARAMETERS_NO_CHANGE 0
  #define NDIS_OFFLOAD_PARAMETERS_LSOV2_DISABLED 1
  #define NDIS_OFFLOAD_PARAMETERS_LSOV2_ENABLED  2
  #define NDIS_OFFLOAD_PARAMETERS_LSOV1_ENABLED  2
  #define NDIS_OFFLOAD_PARAMETERS_RSC_DISABLED 1
  #define NDIS_OFFLOAD_PARAMETERS_RSC_ENABLED 2
  #define NDIS_OFFLOAD_PARAMETERS_TX_RX_DISABLED 1
  #define NDIS_OFFLOAD_PARAMETERS_TX_ENABLED_RX_DISABLED 2
  #define NDIS_OFFLOAD_PARAMETERS_RX_ENABLED_TX_DISABLED 3
  #define NDIS_OFFLOAD_PARAMETERS_TX_RX_ENABLED 4
  
  #define NDIS_TCP_LARGE_SEND_OFFLOAD_V2_TYPE	1
  #define NDIS_TCP_LARGE_SEND_OFFLOAD_IPV4	0
  #define NDIS_TCP_LARGE_SEND_OFFLOAD_IPV6	1
  
  #define VERSION_4_OFFLOAD_SIZE			22
  /*
   * New offload OIDs for NDIS 6
   */
  #define OID_TCP_OFFLOAD_CURRENT_CONFIG 0xFC01020B /* query only */
  #define OID_TCP_OFFLOAD_PARAMETERS 0xFC01020C		/* set only */
  #define OID_TCP_OFFLOAD_HARDWARE_CAPABILITIES 0xFC01020D/* query only */
  #define OID_TCP_CONNECTION_OFFLOAD_CURRENT_CONFIG 0xFC01020E /* query only */
  #define OID_TCP_CONNECTION_OFFLOAD_HARDWARE_CAPABILITIES 0xFC01020F /* query */
  #define OID_OFFLOAD_ENCAPSULATION 0x0101010A /* set/query */
  
  /*
   * OID_TCP_OFFLOAD_HARDWARE_CAPABILITIES
   * ndis_type: NDIS_OBJTYPE_OFFLOAD
   */
  
  #define	NDIS_OFFLOAD_ENCAP_NONE		0x0000
  #define	NDIS_OFFLOAD_ENCAP_NULL		0x0001
  #define	NDIS_OFFLOAD_ENCAP_8023		0x0002
  #define	NDIS_OFFLOAD_ENCAP_8023PQ	0x0004
  #define	NDIS_OFFLOAD_ENCAP_8023PQ_OOB	0x0008
  #define	NDIS_OFFLOAD_ENCAP_RFC1483	0x0010
  
  struct ndis_csum_offload {
  	u32	ip4_txenc;
  	u32	ip4_txcsum;
  #define	NDIS_TXCSUM_CAP_IP4OPT		0x001
  #define	NDIS_TXCSUM_CAP_TCP4OPT		0x004
  #define	NDIS_TXCSUM_CAP_TCP4		0x010
  #define	NDIS_TXCSUM_CAP_UDP4		0x040
  #define	NDIS_TXCSUM_CAP_IP4		0x100
  
  #define NDIS_TXCSUM_ALL_TCP4	(NDIS_TXCSUM_CAP_TCP4 | NDIS_TXCSUM_CAP_TCP4OPT)
  
  	u32	ip4_rxenc;
  	u32	ip4_rxcsum;
  #define	NDIS_RXCSUM_CAP_IP4OPT		0x001
  #define	NDIS_RXCSUM_CAP_TCP4OPT		0x004
  #define	NDIS_RXCSUM_CAP_TCP4		0x010
  #define	NDIS_RXCSUM_CAP_UDP4		0x040
  #define	NDIS_RXCSUM_CAP_IP4		0x100
  	u32	ip6_txenc;
  	u32	ip6_txcsum;
  #define	NDIS_TXCSUM_CAP_IP6EXT		0x001
  #define	NDIS_TXCSUM_CAP_TCP6OPT		0x004
  #define	NDIS_TXCSUM_CAP_TCP6		0x010
  #define	NDIS_TXCSUM_CAP_UDP6		0x040
  	u32	ip6_rxenc;
  	u32	ip6_rxcsum;
  #define	NDIS_RXCSUM_CAP_IP6EXT		0x001
  #define	NDIS_RXCSUM_CAP_TCP6OPT		0x004
  #define	NDIS_RXCSUM_CAP_TCP6		0x010
  #define	NDIS_RXCSUM_CAP_UDP6		0x040
  
  #define NDIS_TXCSUM_ALL_TCP6	(NDIS_TXCSUM_CAP_TCP6 |		\
  				 NDIS_TXCSUM_CAP_TCP6OPT |	\
  				 NDIS_TXCSUM_CAP_IP6EXT)
  };
  
  struct ndis_lsov1_offload {
  	u32	encap;
  	u32	maxsize;
  	u32	minsegs;
  	u32	opts;
  };
  
  struct ndis_ipsecv1_offload {
  	u32	encap;
  	u32	ah_esp;
  	u32	xport_tun;
  	u32	ip4_opts;
  	u32	flags;
  	u32	ip4_ah;
  	u32	ip4_esp;
  };
  
  struct ndis_lsov2_offload {
  	u32	ip4_encap;
  	u32	ip4_maxsz;
  	u32	ip4_minsg;
  	u32	ip6_encap;
  	u32	ip6_maxsz;
  	u32	ip6_minsg;
  	u32	ip6_opts;
  #define	NDIS_LSOV2_CAP_IP6EXT		0x001
  #define	NDIS_LSOV2_CAP_TCP6OPT		0x004
  
  #define NDIS_LSOV2_CAP_IP6		(NDIS_LSOV2_CAP_IP6EXT | \
  					 NDIS_LSOV2_CAP_TCP6OPT)
  };
  
  struct ndis_ipsecv2_offload {
  	u32	encap;
  	u16	ip6;
  	u16	ip4opt;
  	u16	ip6ext;
  	u16	ah;
  	u16	esp;
  	u16	ah_esp;
  	u16	xport;
  	u16	tun;
  	u16	xport_tun;
  	u16	lso;
  	u16	extseq;
  	u32	udp_esp;
  	u32	auth;
  	u32	crypto;
  	u32	sa_caps;
  };
  
  struct ndis_rsc_offload {
  	u16	ip4;
  	u16	ip6;
  };
  
  struct ndis_encap_offload {
  	u32	flags;
  	u32	maxhdr;
  };
  
  struct ndis_offload {
  	struct ndis_object_header	header;
  	struct ndis_csum_offload	csum;
  	struct ndis_lsov1_offload	lsov1;
  	struct ndis_ipsecv1_offload	ipsecv1;
  	struct ndis_lsov2_offload	lsov2;
  	u32				flags;
  	/* NDIS >= 6.1 */
  	struct ndis_ipsecv2_offload	ipsecv2;
  	/* NDIS >= 6.30 */
  	struct ndis_rsc_offload		rsc;
  	struct ndis_encap_offload	encap_gre;
  };
  
  #define	NDIS_OFFLOAD_SIZE		sizeof(struct ndis_offload)
  #define	NDIS_OFFLOAD_SIZE_6_0		offsetof(struct ndis_offload, ipsecv2)
  #define	NDIS_OFFLOAD_SIZE_6_1		offsetof(struct ndis_offload, rsc)
  
  struct ndis_offload_params {
  	struct ndis_object_header header;
  	u8 ip_v4_csum;
  	u8 tcp_ip_v4_csum;
  	u8 udp_ip_v4_csum;
  	u8 tcp_ip_v6_csum;
  	u8 udp_ip_v6_csum;
  	u8 lso_v1;
  	u8 ip_sec_v1;
  	u8 lso_v2_ipv4;
  	u8 lso_v2_ipv6;
  	u8 tcp_connection_ip_v4;
  	u8 tcp_connection_ip_v6;
  	u32 flags;
  	u8 ip_sec_v2;
  	u8 ip_sec_v2_ip_v4;
  	struct {
  		u8 rsc_ip_v4;
  		u8 rsc_ip_v6;
  	};
  	struct {
  		u8 encapsulated_packet_task_offload;
  		u8 encapsulation_types;
  	};
  };
  
  struct ndis_tcp_ip_checksum_info {
  	union {
  		struct {
  			u32 is_ipv4:1;
  			u32 is_ipv6:1;
  			u32 tcp_checksum:1;
  			u32 udp_checksum:1;
  			u32 ip_header_checksum:1;
  			u32 reserved:11;
  			u32 tcp_header_offset:10;
  		} transmit;
  		struct {
  			u32 tcp_checksum_failed:1;
  			u32 udp_checksum_failed:1;
  			u32 ip_checksum_failed:1;
  			u32 tcp_checksum_succeeded:1;
  			u32 udp_checksum_succeeded:1;
  			u32 ip_checksum_succeeded:1;
  			u32 loopback:1;
  			u32 tcp_checksum_value_invalid:1;
  			u32 ip_checksum_value_invalid:1;
  		} receive;
  		u32  value;
  	};
  };
  
  struct ndis_tcp_lso_info {
  	union {
  		struct {
  			u32 unused:30;
  			u32 type:1;
  			u32 reserved2:1;
  		} transmit;
  		struct {
  			u32 mss:20;
  			u32 tcp_header_offset:10;
  			u32 type:1;
  			u32 reserved2:1;
  		} lso_v1_transmit;
  		struct {
  			u32 tcp_payload:30;
  			u32 type:1;
  			u32 reserved2:1;
  		} lso_v1_transmit_complete;
  		struct {
  			u32 mss:20;
  			u32 tcp_header_offset:10;
  			u32 type:1;
  			u32 ip_version:1;
  		} lso_v2_transmit;
  		struct {
  			u32 reserved:30;
  			u32 type:1;
  			u32 reserved2:1;
  		} lso_v2_transmit_complete;
  		u32  value;
  	};
  };
  
  #define NDIS_VLAN_PPI_SIZE (sizeof(struct rndis_per_packet_info) + \
  		sizeof(struct ndis_pkt_8021q_info))
  
  #define NDIS_CSUM_PPI_SIZE (sizeof(struct rndis_per_packet_info) + \
  		sizeof(struct ndis_tcp_ip_checksum_info))
  
  #define NDIS_LSO_PPI_SIZE (sizeof(struct rndis_per_packet_info) + \
  		sizeof(struct ndis_tcp_lso_info))
  
  #define NDIS_HASH_PPI_SIZE (sizeof(struct rndis_per_packet_info) + \
  		sizeof(u32))
  
  /* Total size of all PPI data */
  #define NDIS_ALL_PPI_SIZE (NDIS_VLAN_PPI_SIZE + NDIS_CSUM_PPI_SIZE + \
  			   NDIS_LSO_PPI_SIZE + NDIS_HASH_PPI_SIZE)
  
  /* Format of Information buffer passed in a SetRequest for the OID */
  /* OID_GEN_RNDIS_CONFIG_PARAMETER. */
  struct rndis_config_parameter_info {
  	u32 parameter_name_offset;
  	u32 parameter_name_length;
  	u32 parameter_type;
  	u32 parameter_value_offset;
  	u32 parameter_value_length;
  };
  
  /* Values for ParameterType in struct rndis_config_parameter_info */
  #define RNDIS_CONFIG_PARAM_TYPE_INTEGER     0
  #define RNDIS_CONFIG_PARAM_TYPE_STRING      2
  
  /* CONDIS Miniport messages for connection oriented devices */
  /* that do not implement a call manager. */
  
  /* CoNdisMiniportCreateVc message */
  struct rcondis_mp_create_vc {
  	u32 req_id;
  	u32 ndis_vc_handle;
  };
  
  /* Response to CoNdisMiniportCreateVc */
  struct rcondis_mp_create_vc_complete {
  	u32 req_id;
  	u32 dev_vc_handle;
  	u32 status;
  };
  
  /* CoNdisMiniportDeleteVc message */
  struct rcondis_mp_delete_vc {
  	u32 req_id;
  	u32 dev_vc_handle;
  };
  
  /* Response to CoNdisMiniportDeleteVc */
  struct rcondis_mp_delete_vc_complete {
  	u32 req_id;
  	u32 status;
  };
  
  /* CoNdisMiniportQueryRequest message */
  struct rcondis_mp_query_request {
  	u32 req_id;
  	u32 request_type;
  	u32 oid;
  	u32 dev_vc_handle;
  	u32 info_buflen;
  	u32 info_buf_offset;
  };
  
  /* CoNdisMiniportSetRequest message */
  struct rcondis_mp_set_request {
  	u32 req_id;
  	u32 request_type;
  	u32 oid;
  	u32 dev_vc_handle;
  	u32 info_buflen;
  	u32 info_buf_offset;
  };
  
  /* CoNdisIndicateStatus message */
  struct rcondis_indicate_status {
  	u32 ndis_vc_handle;
  	u32 status;
  	u32 status_buflen;
  	u32 status_buf_offset;
  };
  
  /* CONDIS Call/VC parameters */
  struct rcondis_specific_parameters {
  	u32 parameter_type;
  	u32 parameter_length;
  	u32 parameter_lffset;
  };
  
  struct rcondis_media_parameters {
  	u32 flags;
  	u32 reserved1;
  	u32 reserved2;
  	struct rcondis_specific_parameters media_specific;
  };
  
  struct rndis_flowspec {
  	u32 token_rate;
  	u32 token_bucket_size;
  	u32 peak_bandwidth;
  	u32 latency;
  	u32 delay_variation;
  	u32 service_type;
  	u32 max_sdu_size;
  	u32 minimum_policed_size;
  };
  
  struct rcondis_call_manager_parameters {
  	struct rndis_flowspec transmit;
  	struct rndis_flowspec receive;
  	struct rcondis_specific_parameters call_mgr_specific;
  };
  
  /* CoNdisMiniportActivateVc message */
  struct rcondis_mp_activate_vc_request {
  	u32 req_id;
  	u32 flags;
  	u32 dev_vc_handle;
  	u32 media_params_offset;
  	u32 media_params_length;
  	u32 call_mgr_params_offset;
  	u32 call_mgr_params_length;
  };
  
  /* Response to CoNdisMiniportActivateVc */
  struct rcondis_mp_activate_vc_complete {
  	u32 req_id;
  	u32 status;
  };
  
  /* CoNdisMiniportDeactivateVc message */
  struct rcondis_mp_deactivate_vc_request {
  	u32 req_id;
  	u32 flags;
  	u32 dev_vc_handle;
  };
  
  /* Response to CoNdisMiniportDeactivateVc */
  struct rcondis_mp_deactivate_vc_complete {
  	u32 req_id;
  	u32 status;
  };
  
  
  /* union with all of the RNDIS messages */
  union rndis_message_container {
  	struct rndis_packet pkt;
  	struct rndis_initialize_request init_req;
  	struct rndis_halt_request halt_req;
  	struct rndis_query_request query_req;
  	struct rndis_set_request set_req;
  	struct rndis_reset_request reset_req;
  	struct rndis_keepalive_request keep_alive_req;
  	struct rndis_indicate_status indicate_status;
  	struct rndis_initialize_complete init_complete;
  	struct rndis_query_complete query_complete;
  	struct rndis_set_complete set_complete;
  	struct rndis_reset_complete reset_complete;
  	struct rndis_keepalive_complete keep_alive_complete;
  	struct rcondis_mp_create_vc co_miniport_create_vc;
  	struct rcondis_mp_delete_vc co_miniport_delete_vc;
  	struct rcondis_indicate_status co_indicate_status;
  	struct rcondis_mp_activate_vc_request co_miniport_activate_vc;
  	struct rcondis_mp_deactivate_vc_request co_miniport_deactivate_vc;
  	struct rcondis_mp_create_vc_complete co_miniport_create_vc_complete;
  	struct rcondis_mp_delete_vc_complete co_miniport_delete_vc_complete;
  	struct rcondis_mp_activate_vc_complete co_miniport_activate_vc_complete;
  	struct rcondis_mp_deactivate_vc_complete
  		co_miniport_deactivate_vc_complete;
  };
  
  /* Remote NDIS message format */
  struct rndis_message {
  	u32 ndis_msg_type;
  
  	/* Total length of this message, from the beginning */
  	/* of the struct rndis_message, in bytes. */
  	u32 msg_len;
  
  	/* Actual message */
  	union rndis_message_container msg;
  };
  
  
  /* Handy macros */
  
  /* get the size of an RNDIS message. Pass in the message type, */
  /* struct rndis_set_request, struct rndis_packet for example */
  #define RNDIS_MESSAGE_SIZE(msg)				\
  	(sizeof(msg) + (sizeof(struct rndis_message) -	\
  	 sizeof(union rndis_message_container)))
  
  /* get pointer to info buffer with message pointer */
  #define MESSAGE_TO_INFO_BUFFER(msg)				\
  	(((unsigned char *)(msg)) + msg->info_buf_offset)
  
  /* get pointer to status buffer with message pointer */
  #define MESSAGE_TO_STATUS_BUFFER(msg)			\
  	(((unsigned char *)(msg)) + msg->status_buf_offset)
  
  /* get pointer to OOBD buffer with message pointer */
  #define MESSAGE_TO_OOBD_BUFFER(msg)				\
  	(((unsigned char *)(msg)) + msg->oob_data_offset)
  
  /* get pointer to data buffer with message pointer */
  #define MESSAGE_TO_DATA_BUFFER(msg)				\
  	(((unsigned char *)(msg)) + msg->per_pkt_info_offset)
  
  /* get pointer to contained message from NDIS_MESSAGE pointer */
  #define RNDIS_MESSAGE_PTR_TO_MESSAGE_PTR(rndis_msg)		\
  	((void *) &rndis_msg->msg)
  
  /* get pointer to contained message from NDIS_MESSAGE pointer */
  #define RNDIS_MESSAGE_RAW_PTR_TO_MESSAGE_PTR(rndis_msg)	\
  	((void *) rndis_msg)
  
  
  
  #define RNDIS_HEADER_SIZE	(sizeof(struct rndis_message) - \
  				 sizeof(union rndis_message_container))
  
  #define RNDIS_AND_PPI_SIZE (sizeof(struct rndis_message) + NDIS_ALL_PPI_SIZE)
  
  #define NDIS_PACKET_TYPE_DIRECTED	0x00000001
  #define NDIS_PACKET_TYPE_MULTICAST	0x00000002
  #define NDIS_PACKET_TYPE_ALL_MULTICAST	0x00000004
  #define NDIS_PACKET_TYPE_BROADCAST	0x00000008
  #define NDIS_PACKET_TYPE_SOURCE_ROUTING	0x00000010
  #define NDIS_PACKET_TYPE_PROMISCUOUS	0x00000020
  #define NDIS_PACKET_TYPE_SMT		0x00000040
  #define NDIS_PACKET_TYPE_ALL_LOCAL	0x00000080
  #define NDIS_PACKET_TYPE_GROUP		0x00000100
  #define NDIS_PACKET_TYPE_ALL_FUNCTIONAL	0x00000200
  #define NDIS_PACKET_TYPE_FUNCTIONAL	0x00000400
  #define NDIS_PACKET_TYPE_MAC_FRAME	0x00000800
  
  #define TRANSPORT_INFO_NOT_IP   0
  #define TRANSPORT_INFO_IPV4_TCP 0x01
  #define TRANSPORT_INFO_IPV4_UDP 0x02
  #define TRANSPORT_INFO_IPV6_TCP 0x10
  #define TRANSPORT_INFO_IPV6_UDP 0x20
  
  #endif /* _HYPERV_NET_H */
  