staging: hv: move hv_netvsc out of staging area

hv_netvsc has been reviewed on netdev mailing list on 6/09/2011.
All recommended changes have been made. We are requesting to move
it out of staging area.

Signed-off-by: Haiyang Zhang <haiyangz@microsoft.com>
Signed-off-by: KY Srinivasan <kys@microsoft.com>
Signed-off-by: Mike Sterling <Mike.Sterling@microsoft.com>
Acked-by: Stephen Hemminger <shemminger@vyatta.com>
Acked-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

6 files changed, 3316 insertions, 0 deletions

diff --git a/drivers/net/hyperv/Kconfig b/drivers/net/hyperv/Kconfig
new file mode 100644
index 000000000000..936968d23559
--- /dev/null
+++ b/drivers/net/hyperv/Kconfig
@@ -0,0 +1,5 @@
+config HYPERV_NET
+        tristate "Microsoft Hyper-V virtual network driver"
+        depends on HYPERV
+        help
+          Select this option to enable the Hyper-V virtual network driver.
diff --git a/drivers/net/hyperv/Makefile b/drivers/net/hyperv/Makefile
new file mode 100644
index 000000000000..c8a66827100c
--- /dev/null
+++ b/drivers/net/hyperv/Makefile
@@ -0,0 +1,3 @@
+obj-$(CONFIG_HYPERV_NET) += hv_netvsc.o
+
+hv_netvsc-y := netvsc_drv.o netvsc.o rndis_filter.o
diff --git a/drivers/net/hyperv/hyperv_net.h b/drivers/net/hyperv/hyperv_net.h
new file mode 100644
index 000000000000..ac1ec8405124
--- /dev/null
+++ b/drivers/net/hyperv/hyperv_net.h
@@ -0,0 +1,1058 @@
+/*
+ *
+ * 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, write to the Free Software Foundation, Inc., 59 Temple
+ * Place - Suite 330, Boston, MA 02111-1307 USA.
+ *
+ * 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>
+
+/* Fwd declaration */
+struct hv_netvsc_packet;
+
+/* Represent the xfer page packet which contains 1 or more netvsc packet */
+struct xferpage_packet {
+        struct list_head list_ent;
+
+        /* # of netvsc packets this xfer packet contains */
+        u32 count;
+};
+
+/* The number of pages which are enough to cover jumbo frame buffer. */
+#define NETVSC_PACKET_MAXPAGE           4
+
+/*
+ * Represent netvsc packet which contains 1 RNDIS and 1 ethernet frame
+ * within the RNDIS
+ */
+struct hv_netvsc_packet {
+        /* Bookkeeping stuff */
+        struct list_head list_ent;
+
+        struct hv_device *device;
+        bool is_data_pkt;
+
+        /*
+         * Valid only for receives when we break a xfer page packet
+         * into multiple netvsc packets
+         */
+        struct xferpage_packet *xfer_page_pkt;
+
+        union {
+                struct {
+                        u64 recv_completion_tid;
+                        void *recv_completion_ctx;
+                        void (*recv_completion)(void *context);
+                } recv;
+                struct {
+                        u64 send_completion_tid;
+                        void *send_completion_ctx;
+                        void (*send_completion)(void *context);
+                } send;
+        } completion;
+
+        /* This points to the memory after page_buf */
+        void *extension;
+
+        u32 total_data_buflen;
+        /* Points to the send/receive buffer where the ethernet frame is */
+        u32 page_buf_cnt;
+        struct hv_page_buffer page_buf[NETVSC_PACKET_MAXPAGE];
+};
+
+struct netvsc_device_info {
+        unsigned char mac_adr[6];
+        bool link_state;        /* 0 - link up, 1 - link down */
+        int  ring_size;
+};
+
+/* Interface */
+int netvsc_device_add(struct hv_device *device, void *additional_info);
+int netvsc_device_remove(struct hv_device *device);
+int netvsc_send(struct hv_device *device,
+                struct hv_netvsc_packet *packet);
+void netvsc_linkstatus_callback(struct hv_device *device_obj,
+                                unsigned int status);
+int netvsc_recv_callback(struct hv_device *device_obj,
+                        struct hv_netvsc_packet *packet);
+int rndis_filter_open(struct hv_device *dev);
+int rndis_filter_close(struct hv_device *dev);
+int rndis_filter_device_add(struct hv_device *dev,
+                        void *additional_info);
+void rndis_filter_device_remove(struct hv_device *dev);
+int rndis_filter_receive(struct hv_device *dev,
+                        struct hv_netvsc_packet *pkt);
+
+
+
+int rndis_filter_send(struct hv_device *dev,
+                        struct hv_netvsc_packet *pkt);
+
+#define NVSP_INVALID_PROTOCOL_VERSION   ((u32)0xFFFFFFFF)
+
+#define NVSP_PROTOCOL_VERSION_1         2
+#define NVSP_MIN_PROTOCOL_VERSION       NVSP_PROTOCOL_VERSION_1
+#define NVSP_MAX_PROTOCOL_VERSION       NVSP_PROTOCOL_VERSION_1
+
+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,
+
+        /*
+         * This should be set to the number of messages for the version with
+         * the maximum number of messages.
+         */
+        NVSP_NUM_MSG_PER_VERSION                = 9,
+};
+
+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_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 RNIDS. 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;
+
+union nvsp_all_messages {
+        union nvsp_message_init_uber init_msg;
+        union nvsp_1_message_uber v1_msg;
+} __packed;
+
+/* ALL Messages */
+struct nvsp_message {
+        struct nvsp_message_header hdr;
+        union nvsp_all_messages msg;
+} __packed;
+
+
+
+
+/* #define NVSC_MIN_PROTOCOL_VERSION            1 */
+/* #define NVSC_MAX_PROTOCOL_VERSION            1 */
+
+#define NETVSC_RECEIVE_BUFFER_SIZE              (1024*1024)     /* 1MB */
+
+#define NETVSC_RECEIVE_BUFFER_ID                0xcafe
+
+#define NETVSC_RECEIVE_SG_COUNT                 1
+
+/* Preallocated receive packets */
+#define NETVSC_RECEIVE_PACKETLIST_COUNT         256
+
+#define NETVSC_PACKET_SIZE                      2048
+
+/* Per netvsc channel-specific */
+struct netvsc_device {
+        struct hv_device *dev;
+
+        atomic_t num_outstanding_sends;
+        bool destroy;
+        /*
+         * List of free preallocated hv_netvsc_packet to represent receive
+         * packet
+         */
+        struct list_head recv_pkt_list;
+        spinlock_t recv_pkt_list_lock;
+
+        /* Receive buffer allocated by us but manages by NetVSP */
+        void *recv_buf;
+        u32 recv_buf_size;
+        u32 recv_buf_gpadl_handle;
+        u32 recv_section_cnt;
+        struct nvsp_1_receive_buffer_section *recv_section;
+
+        /* Used for NetVSP initialization protocol */
+        struct completion channel_init_wait;
+        struct nvsp_message channel_init_pkt;
+
+        struct nvsp_message revoke_packet;
+        /* unsigned char HwMacAddr[HW_MACADDR_LEN]; */
+
+        struct net_device *ndev;
+
+        /* Holds rndis device info */
+        void *extension;
+};
+
+
+/*  Status codes */
+
+
+#ifndef STATUS_SUCCESS
+#define STATUS_SUCCESS                          (0x00000000L)
+#endif
+
+#ifndef STATUS_UNSUCCESSFUL
+#define STATUS_UNSUCCESSFUL                     (0xC0000001L)
+#endif
+
+#ifndef STATUS_PENDING
+#define STATUS_PENDING                          (0x00000103L)
+#endif
+
+#ifndef STATUS_INSUFFICIENT_RESOURCES
+#define STATUS_INSUFFICIENT_RESOURCES           (0xC000009AL)
+#endif
+
+#ifndef STATUS_BUFFER_OVERFLOW
+#define STATUS_BUFFER_OVERFLOW                  (0x80000005L)
+#endif
+
+#ifndef STATUS_NOT_SUPPORTED
+#define STATUS_NOT_SUPPORTED                    (0xC00000BBL)
+#endif
+
+#define RNDIS_STATUS_SUCCESS                    (STATUS_SUCCESS)
+#define RNDIS_STATUS_PENDING                    (STATUS_PENDING)
+#define RNDIS_STATUS_NOT_RECOGNIZED             (0x00010001L)
+#define RNDIS_STATUS_NOT_COPIED                 (0x00010002L)
+#define RNDIS_STATUS_NOT_ACCEPTED               (0x00010003L)
+#define RNDIS_STATUS_CALL_ACTIVE                (0x00010007L)
+
+#define RNDIS_STATUS_ONLINE                     (0x40010003L)
+#define RNDIS_STATUS_RESET_START                (0x40010004L)
+#define RNDIS_STATUS_RESET_END                  (0x40010005L)
+#define RNDIS_STATUS_RING_STATUS                (0x40010006L)
+#define RNDIS_STATUS_CLOSED                     (0x40010007L)
+#define RNDIS_STATUS_WAN_LINE_UP                (0x40010008L)
+#define RNDIS_STATUS_WAN_LINE_DOWN              (0x40010009L)
+#define RNDIS_STATUS_WAN_FRAGMENT               (0x4001000AL)
+#define RNDIS_STATUS_MEDIA_CONNECT              (0x4001000BL)
+#define RNDIS_STATUS_MEDIA_DISCONNECT           (0x4001000CL)
+#define RNDIS_STATUS_HARDWARE_LINE_UP           (0x4001000DL)
+#define RNDIS_STATUS_HARDWARE_LINE_DOWN         (0x4001000EL)
+#define RNDIS_STATUS_INTERFACE_UP               (0x4001000FL)
+#define RNDIS_STATUS_INTERFACE_DOWN             (0x40010010L)
+#define RNDIS_STATUS_MEDIA_BUSY                 (0x40010011L)
+#define RNDIS_STATUS_MEDIA_SPECIFIC_INDICATION  (0x40010012L)
+#define RNDIS_STATUS_WW_INDICATION              RDIA_SPECIFIC_INDICATION
+#define RNDIS_STATUS_LINK_SPEED_CHANGE          (0x40010013L)
+
+#define RNDIS_STATUS_NOT_RESETTABLE             (0x80010001L)
+#define RNDIS_STATUS_SOFT_ERRORS                (0x80010003L)
+#define RNDIS_STATUS_HARD_ERRORS                (0x80010004L)
+#define RNDIS_STATUS_BUFFER_OVERFLOW            (STATUS_BUFFER_OVERFLOW)
+
+#define RNDIS_STATUS_FAILURE                    (STATUS_UNSUCCESSFUL)
+#define RNDIS_STATUS_RESOURCES                  (STATUS_INSUFFICIENT_RESOURCES)
+#define RNDIS_STATUS_CLOSING                    (0xC0010002L)
+#define RNDIS_STATUS_BAD_VERSION                (0xC0010004L)
+#define RNDIS_STATUS_BAD_CHARACTERISTICS        (0xC0010005L)
+#define RNDIS_STATUS_ADAPTER_NOT_FOUND          (0xC0010006L)
+#define RNDIS_STATUS_OPEN_FAILED                (0xC0010007L)
+#define RNDIS_STATUS_DEVICE_FAILED              (0xC0010008L)
+#define RNDIS_STATUS_MULTICAST_FULL             (0xC0010009L)
+#define RNDIS_STATUS_MULTICAST_EXISTS           (0xC001000AL)
+#define RNDIS_STATUS_MULTICAST_NOT_FOUND        (0xC001000BL)
+#define RNDIS_STATUS_REQUEST_ABORTED            (0xC001000CL)
+#define RNDIS_STATUS_RESET_IN_PROGRESS          (0xC001000DL)
+#define RNDIS_STATUS_CLOSING_INDICATING         (0xC001000EL)
+#define RNDIS_STATUS_NOT_SUPPORTED              (STATUS_NOT_SUPPORTED)
+#define RNDIS_STATUS_INVALID_PACKET             (0xC001000FL)
+#define RNDIS_STATUS_OPEN_LIST_FULL             (0xC0010010L)
+#define RNDIS_STATUS_ADAPTER_NOT_READY          (0xC0010011L)
+#define RNDIS_STATUS_ADAPTER_NOT_OPEN           (0xC0010012L)
+#define RNDIS_STATUS_NOT_INDICATING             (0xC0010013L)
+#define RNDIS_STATUS_INVALID_LENGTH             (0xC0010014L)
+#define RNDIS_STATUS_INVALID_DATA               (0xC0010015L)
+#define RNDIS_STATUS_BUFFER_TOO_SHORT           (0xC0010016L)
+#define RNDIS_STATUS_INVALID_OID                (0xC0010017L)
+#define RNDIS_STATUS_ADAPTER_REMOVED            (0xC0010018L)
+#define RNDIS_STATUS_UNSUPPORTED_MEDIA          (0xC0010019L)
+#define RNDIS_STATUS_GROUP_ADDRESS_IN_USE       (0xC001001AL)
+#define RNDIS_STATUS_FILE_NOT_FOUND             (0xC001001BL)
+#define RNDIS_STATUS_ERROR_READING_FILE         (0xC001001CL)
+#define RNDIS_STATUS_ALREADY_MAPPED             (0xC001001DL)
+#define RNDIS_STATUS_RESOURCE_CONFLICT          (0xC001001EL)
+#define RNDIS_STATUS_NO_CABLE                   (0xC001001FL)
+
+#define RNDIS_STATUS_INVALID_SAP                (0xC0010020L)
+#define RNDIS_STATUS_SAP_IN_USE                 (0xC0010021L)
+#define RNDIS_STATUS_INVALID_ADDRESS            (0xC0010022L)
+#define RNDIS_STATUS_VC_NOT_ACTIVATED           (0xC0010023L)
+#define RNDIS_STATUS_DEST_OUT_OF_ORDER          (0xC0010024L)
+#define RNDIS_STATUS_VC_NOT_AVAILABLE           (0xC0010025L)
+#define RNDIS_STATUS_CELLRATE_NOT_AVAILABLE     (0xC0010026L)
+#define RNDIS_STATUS_INCOMPATABLE_QOS           (0xC0010027L)
+#define RNDIS_STATUS_AAL_PARAMS_UNSUPPORTED     (0xC0010028L)
+#define RNDIS_STATUS_NO_ROUTE_TO_DESTINATION    (0xC0010029L)
+
+#define RNDIS_STATUS_TOKEN_RING_OPEN_ERROR      (0xC0011000L)
+
+/* Object Identifiers used by NdisRequest Query/Set Information */
+/* General Objects */
+#define RNDIS_OID_GEN_SUPPORTED_LIST            0x00010101
+#define RNDIS_OID_GEN_HARDWARE_STATUS           0x00010102
+#define RNDIS_OID_GEN_MEDIA_SUPPORTED           0x00010103
+#define RNDIS_OID_GEN_MEDIA_IN_USE              0x00010104
+#define RNDIS_OID_GEN_MAXIMUM_LOOKAHEAD         0x00010105
+#define RNDIS_OID_GEN_MAXIMUM_FRAME_SIZE        0x00010106
+#define RNDIS_OID_GEN_LINK_SPEED                0x00010107
+#define RNDIS_OID_GEN_TRANSMIT_BUFFER_SPACE     0x00010108
+#define RNDIS_OID_GEN_RECEIVE_BUFFER_SPACE      0x00010109
+#define RNDIS_OID_GEN_TRANSMIT_BLOCK_SIZE       0x0001010A
+#define RNDIS_OID_GEN_RECEIVE_BLOCK_SIZE        0x0001010B
+#define RNDIS_OID_GEN_VENDOR_ID                 0x0001010C
+#define RNDIS_OID_GEN_VENDOR_DESCRIPTION        0x0001010D
+#define RNDIS_OID_GEN_CURRENT_PACKET_FILTER     0x0001010E
+#define RNDIS_OID_GEN_CURRENT_LOOKAHEAD         0x0001010F
+#define RNDIS_OID_GEN_DRIVER_VERSION            0x00010110
+#define RNDIS_OID_GEN_MAXIMUM_TOTAL_SIZE        0x00010111
+#define RNDIS_OID_GEN_PROTOCOL_OPTIONS          0x00010112
+#define RNDIS_OID_GEN_MAC_OPTIONS               0x00010113
+#define RNDIS_OID_GEN_MEDIA_CONNECT_STATUS      0x00010114
+#define RNDIS_OID_GEN_MAXIMUM_SEND_PACKETS      0x00010115
+#define RNDIS_OID_GEN_VENDOR_DRIVER_VERSION     0x00010116
+#define RNDIS_OID_GEN_NETWORK_LAYER_ADDRESSES   0x00010118
+#define RNDIS_OID_GEN_TRANSPORT_HEADER_OFFSET   0x00010119
+#define RNDIS_OID_GEN_MACHINE_NAME              0x0001021A
+#define RNDIS_OID_GEN_RNDIS_CONFIG_PARAMETER    0x0001021B
+
+#define RNDIS_OID_GEN_XMIT_OK                   0x00020101
+#define RNDIS_OID_GEN_RCV_OK                    0x00020102
+#define RNDIS_OID_GEN_XMIT_ERROR                0x00020103
+#define RNDIS_OID_GEN_RCV_ERROR                 0x00020104
+#define RNDIS_OID_GEN_RCV_NO_BUFFER             0x00020105
+
+#define RNDIS_OID_GEN_DIRECTED_BYTES_XMIT       0x00020201
+#define RNDIS_OID_GEN_DIRECTED_FRAMES_XMIT      0x00020202
+#define RNDIS_OID_GEN_MULTICAST_BYTES_XMIT      0x00020203
+#define RNDIS_OID_GEN_MULTICAST_FRAMES_XMIT     0x00020204
+#define RNDIS_OID_GEN_BROADCAST_BYTES_XMIT      0x00020205
+#define RNDIS_OID_GEN_BROADCAST_FRAMES_XMIT     0x00020206
+#define RNDIS_OID_GEN_DIRECTED_BYTES_RCV        0x00020207
+#define RNDIS_OID_GEN_DIRECTED_FRAMES_RCV       0x00020208
+#define RNDIS_OID_GEN_MULTICAST_BYTES_RCV       0x00020209
+#define RNDIS_OID_GEN_MULTICAST_FRAMES_RCV      0x0002020A
+#define RNDIS_OID_GEN_BROADCAST_BYTES_RCV       0x0002020B
+#define RNDIS_OID_GEN_BROADCAST_FRAMES_RCV      0x0002020C
+
+#define RNDIS_OID_GEN_RCV_CRC_ERROR             0x0002020D
+#define RNDIS_OID_GEN_TRANSMIT_QUEUE_LENGTH     0x0002020E
+
+#define RNDIS_OID_GEN_GET_TIME_CAPS             0x0002020F
+#define RNDIS_OID_GEN_GET_NETCARD_TIME          0x00020210
+
+/* These are connection-oriented general OIDs. */
+/* These replace the above OIDs for connection-oriented media. */
+#define RNDIS_OID_GEN_CO_SUPPORTED_LIST         0x00010101
+#define RNDIS_OID_GEN_CO_HARDWARE_STATUS        0x00010102
+#define RNDIS_OID_GEN_CO_MEDIA_SUPPORTED        0x00010103
+#define RNDIS_OID_GEN_CO_MEDIA_IN_USE           0x00010104
+#define RNDIS_OID_GEN_CO_LINK_SPEED             0x00010105
+#define RNDIS_OID_GEN_CO_VENDOR_ID              0x00010106
+#define RNDIS_OID_GEN_CO_VENDOR_DESCRIPTION     0x00010107
+#define RNDIS_OID_GEN_CO_DRIVER_VERSION         0x00010108
+#define RNDIS_OID_GEN_CO_PROTOCOL_OPTIONS       0x00010109
+#define RNDIS_OID_GEN_CO_MAC_OPTIONS            0x0001010A
+#define RNDIS_OID_GEN_CO_MEDIA_CONNECT_STATUS   0x0001010B
+#define RNDIS_OID_GEN_CO_VENDOR_DRIVER_VERSION  0x0001010C
+#define RNDIS_OID_GEN_CO_MINIMUM_LINK_SPEED     0x0001010D
+
+#define RNDIS_OID_GEN_CO_GET_TIME_CAPS          0x00010201
+#define RNDIS_OID_GEN_CO_GET_NETCARD_TIME       0x00010202
+
+/* These are connection-oriented statistics OIDs. */
+#define RNDIS_OID_GEN_CO_XMIT_PDUS_OK           0x00020101
+#define RNDIS_OID_GEN_CO_RCV_PDUS_OK            0x00020102
+#define RNDIS_OID_GEN_CO_XMIT_PDUS_ERROR        0x00020103
+#define RNDIS_OID_GEN_CO_RCV_PDUS_ERROR         0x00020104
+#define RNDIS_OID_GEN_CO_RCV_PDUS_NO_BUFFER     0x00020105
+
+
+#define RNDIS_OID_GEN_CO_RCV_CRC_ERROR          0x00020201
+#define RNDIS_OID_GEN_CO_TRANSMIT_QUEUE_LENGTH  0x00020202
+#define RNDIS_OID_GEN_CO_BYTES_XMIT             0x00020203
+#define RNDIS_OID_GEN_CO_BYTES_RCV              0x00020204
+#define RNDIS_OID_GEN_CO_BYTES_XMIT_OUTSTANDING 0x00020205
+#define RNDIS_OID_GEN_CO_NETCARD_LOAD           0x00020206
+
+/* These are objects for Connection-oriented media call-managers. */
+#define RNDIS_OID_CO_ADD_PVC                    0xFF000001
+#define RNDIS_OID_CO_DELETE_PVC                 0xFF000002
+#define RNDIS_OID_CO_GET_CALL_INFORMATION       0xFF000003
+#define RNDIS_OID_CO_ADD_ADDRESS                0xFF000004
+#define RNDIS_OID_CO_DELETE_ADDRESS             0xFF000005
+#define RNDIS_OID_CO_GET_ADDRESSES              0xFF000006
+#define RNDIS_OID_CO_ADDRESS_CHANGE             0xFF000007
+#define RNDIS_OID_CO_SIGNALING_ENABLED          0xFF000008
+#define RNDIS_OID_CO_SIGNALING_DISABLED         0xFF000009
+
+/* 802.3 Objects (Ethernet) */
+#define RNDIS_OID_802_3_PERMANENT_ADDRESS       0x01010101
+#define RNDIS_OID_802_3_CURRENT_ADDRESS         0x01010102
+#define RNDIS_OID_802_3_MULTICAST_LIST          0x01010103
+#define RNDIS_OID_802_3_MAXIMUM_LIST_SIZE       0x01010104
+#define RNDIS_OID_802_3_MAC_OPTIONS             0x01010105
+
+#define NDIS_802_3_MAC_OPTION_PRIORITY          0x00000001
+
+#define RNDIS_OID_802_3_RCV_ERROR_ALIGNMENT     0x01020101
+#define RNDIS_OID_802_3_XMIT_ONE_COLLISION      0x01020102
+#define RNDIS_OID_802_3_XMIT_MORE_COLLISIONS    0x01020103
+
+#define RNDIS_OID_802_3_XMIT_DEFERRED           0x01020201
+#define RNDIS_OID_802_3_XMIT_MAX_COLLISIONS     0x01020202
+#define RNDIS_OID_802_3_RCV_OVERRUN             0x01020203
+#define RNDIS_OID_802_3_XMIT_UNDERRUN           0x01020204
+#define RNDIS_OID_802_3_XMIT_HEARTBEAT_FAILURE  0x01020205
+#define RNDIS_OID_802_3_XMIT_TIMES_CRS_LOST     0x01020206
+#define RNDIS_OID_802_3_XMIT_LATE_COLLISIONS    0x01020207
+
+/* Remote NDIS message types */
+#define REMOTE_NDIS_PACKET_MSG                  0x00000001
+#define REMOTE_NDIS_INITIALIZE_MSG              0x00000002
+#define REMOTE_NDIS_HALT_MSG                    0x00000003
+#define REMOTE_NDIS_QUERY_MSG                   0x00000004
+#define REMOTE_NDIS_SET_MSG                     0x00000005
+#define REMOTE_NDIS_RESET_MSG                   0x00000006
+#define REMOTE_NDIS_INDICATE_STATUS_MSG         0x00000007
+#define REMOTE_NDIS_KEEPALIVE_MSG               0x00000008
+
+#define REMOTE_CONDIS_MP_CREATE_VC_MSG          0x00008001
+#define REMOTE_CONDIS_MP_DELETE_VC_MSG          0x00008002
+#define REMOTE_CONDIS_MP_ACTIVATE_VC_MSG        0x00008005
+#define REMOTE_CONDIS_MP_DEACTIVATE_VC_MSG      0x00008006
+#define REMOTE_CONDIS_INDICATE_STATUS_MSG       0x00008007
+
+/* Remote NDIS message completion types */
+#define REMOTE_NDIS_INITIALIZE_CMPLT            0x80000002
+#define REMOTE_NDIS_QUERY_CMPLT                 0x80000004
+#define REMOTE_NDIS_SET_CMPLT                   0x80000005
+#define REMOTE_NDIS_RESET_CMPLT                 0x80000006
+#define REMOTE_NDIS_KEEPALIVE_CMPLT             0x80000008
+
+#define REMOTE_CONDIS_MP_CREATE_VC_CMPLT        0x80008001
+#define REMOTE_CONDIS_MP_DELETE_VC_CMPLT        0x80008002
+#define REMOTE_CONDIS_MP_ACTIVATE_VC_CMPLT      0x80008005
+#define REMOTE_CONDIS_MP_DEACTIVATE_VC_CMPLT    0x80008006
+
+/*
+ * Reserved message type for private communication between lower-layer host
+ * driver and remote device, if necessary.
+ */
+#define REMOTE_NDIS_BUS_MSG                     0xff000001
+
+/*  Defines for DeviceFlags in struct rndis_initialize_complete */
+#define RNDIS_DF_CONNECTIONLESS                 0x00000001
+#define RNDIS_DF_CONNECTION_ORIENTED            0x00000002
+#define RNDIS_DF_RAW_DATA                       0x00000004
+
+/*  Remote NDIS medium types. */
+#define RNDIS_MEDIUM_802_3                      0x00000000
+#define RNDIS_MEDIUM_802_5                      0x00000001
+#define RNDIS_MEDIUM_FDDI                               0x00000002
+#define RNDIS_MEDIUM_WAN                                0x00000003
+#define RNDIS_MEDIUM_LOCAL_TALK                 0x00000004
+#define RNDIS_MEDIUM_ARCNET_RAW                 0x00000006
+#define RNDIS_MEDIUM_ARCNET_878_2                       0x00000007
+#define RNDIS_MEDIUM_ATM                                0x00000008
+#define RNDIS_MEDIUM_WIRELESS_WAN                       0x00000009
+#define RNDIS_MEDIUM_IRDA                               0x0000000a
+#define RNDIS_MEDIUM_CO_WAN                     0x0000000b
+/* Not a real medium, defined as an upper-bound */
+#define RNDIS_MEDIUM_MAX                                0x0000000d
+
+
+/* Remote NDIS medium connection states. */
+#define RNDIS_MEDIA_STATE_CONNECTED             0x00000000
+#define RNDIS_MEDIA_STATE_DISCONNECTED          0x00000001
+
+/*  Remote NDIS version numbers */
+#define RNDIS_MAJOR_VERSION                     0x00000001
+#define RNDIS_MINOR_VERSION                     0x00000000
+
+
+/* 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 per_pkt_info_offset;
+};
+
+/* 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 sruct rndis_message, in bytes. */
+        u32 msg_len;
+
+        /* Actual message */
+        union rndis_message_container msg;
+};
+
+
+struct rndis_filter_packet {
+        void *completion_ctx;
+        void (*completion)(void *context);
+        struct rndis_message 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 __struct_bcount(x)
+
+
+
+#define RNDIS_HEADER_SIZE       (sizeof(struct rndis_message) - \
+                                 sizeof(union rndis_message_container))
+
+#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
+
+
+
+#endif /* _HYPERV_NET_H */
diff --git a/drivers/net/hyperv/netvsc.c b/drivers/net/hyperv/netvsc.c
new file mode 100644
index 000000000000..28e69a6c74a1
--- /dev/null
+++ b/drivers/net/hyperv/netvsc.c
@@ -0,0 +1,939 @@
+/*
+ * Copyright (c) 2009, 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, write to the Free Software Foundation, Inc., 59 Temple
+ * Place - Suite 330, Boston, MA 02111-1307 USA.
+ *
+ * Authors:
+ *   Haiyang Zhang <haiyangz@microsoft.com>
+ *   Hank Janssen  <hjanssen@microsoft.com>
+ */
+#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
+
+#include <linux/kernel.h>
+#include <linux/sched.h>
+#include <linux/wait.h>
+#include <linux/mm.h>
+#include <linux/delay.h>
+#include <linux/io.h>
+#include <linux/slab.h>
+#include <linux/netdevice.h>
+
+#include "hyperv_net.h"
+
+
+static struct netvsc_device *alloc_net_device(struct hv_device *device)
+{
+        struct netvsc_device *net_device;
+        struct net_device *ndev = hv_get_drvdata(device);
+
+        net_device = kzalloc(sizeof(struct netvsc_device), GFP_KERNEL);
+        if (!net_device)
+                return NULL;
+
+
+        net_device->destroy = false;
+        net_device->dev = device;
+        net_device->ndev = ndev;
+
+        hv_set_drvdata(device, net_device);
+        return net_device;
+}
+
+static struct netvsc_device *get_outbound_net_device(struct hv_device *device)
+{
+        struct netvsc_device *net_device;
+
+        net_device = hv_get_drvdata(device);
+        if (net_device && net_device->destroy)
+                net_device = NULL;
+
+        return net_device;
+}
+
+static struct netvsc_device *get_inbound_net_device(struct hv_device *device)
+{
+        struct netvsc_device *net_device;
+
+        net_device = hv_get_drvdata(device);
+
+        if (!net_device)
+                goto get_in_err;
+
+        if (net_device->destroy &&
+                atomic_read(&net_device->num_outstanding_sends) == 0)
+                net_device = NULL;
+
+get_in_err:
+        return net_device;
+}
+
+
+static int netvsc_destroy_recv_buf(struct netvsc_device *net_device)
+{
+        struct nvsp_message *revoke_packet;
+        int ret = 0;
+        struct net_device *ndev = net_device->ndev;
+
+        /*
+         * If we got a section count, it means we received a
+         * SendReceiveBufferComplete msg (ie sent
+         * NvspMessage1TypeSendReceiveBuffer msg) therefore, we need
+         * to send a revoke msg here
+         */
+        if (net_device->recv_section_cnt) {
+                /* Send the revoke receive buffer */
+                revoke_packet = &net_device->revoke_packet;
+                memset(revoke_packet, 0, sizeof(struct nvsp_message));
+
+                revoke_packet->hdr.msg_type =
+                        NVSP_MSG1_TYPE_REVOKE_RECV_BUF;
+                revoke_packet->msg.v1_msg.
+                revoke_recv_buf.id = NETVSC_RECEIVE_BUFFER_ID;
+
+                ret = vmbus_sendpacket(net_device->dev->channel,
+                                       revoke_packet,
+                                       sizeof(struct nvsp_message),
+                                       (unsigned long)revoke_packet,
+                                       VM_PKT_DATA_INBAND, 0);
+                /*
+                 * If we failed here, we might as well return and
+                 * have a leak rather than continue and a bugchk
+                 */
+                if (ret != 0) {
+                        netdev_err(ndev, "unable to send "
+                                "revoke receive buffer to netvsp\n");
+                        return ret;
+                }
+        }
+
+        /* Teardown the gpadl on the vsp end */
+        if (net_device->recv_buf_gpadl_handle) {
+                ret = vmbus_teardown_gpadl(net_device->dev->channel,
+                           net_device->recv_buf_gpadl_handle);
+
+                /* If we failed here, we might as well return and have a leak
+                 * rather than continue and a bugchk
+                 */
+                if (ret != 0) {
+                        netdev_err(ndev,
+                                   "unable to teardown receive buffer's gpadl\n");
+                        return ret;
+                }
+                net_device->recv_buf_gpadl_handle = 0;
+        }
+
+        if (net_device->recv_buf) {
+                /* Free up the receive buffer */
+                free_pages((unsigned long)net_device->recv_buf,
+                        get_order(net_device->recv_buf_size));
+                net_device->recv_buf = NULL;
+        }
+
+        if (net_device->recv_section) {
+                net_device->recv_section_cnt = 0;
+                kfree(net_device->recv_section);
+                net_device->recv_section = NULL;
+        }
+
+        return ret;
+}
+
+static int netvsc_init_recv_buf(struct hv_device *device)
+{
+        int ret = 0;
+        int t;
+        struct netvsc_device *net_device;
+        struct nvsp_message *init_packet;
+        struct net_device *ndev;
+
+        net_device = get_outbound_net_device(device);
+        if (!net_device)
+                return -ENODEV;
+        ndev = net_device->ndev;
+
+        net_device->recv_buf =
+                (void *)__get_free_pages(GFP_KERNEL|__GFP_ZERO,
+                                get_order(net_device->recv_buf_size));
+        if (!net_device->recv_buf) {
+                netdev_err(ndev, "unable to allocate receive "
+                        "buffer of size %d\n", net_device->recv_buf_size);
+                ret = -ENOMEM;
+                goto cleanup;
+        }
+
+        /*
+         * Establish the gpadl handle for this buffer on this
+         * channel.  Note: This call uses the vmbus connection rather
+         * than the channel to establish the gpadl handle.
+         */
+        ret = vmbus_establish_gpadl(device->channel, net_device->recv_buf,
+                                    net_device->recv_buf_size,
+                                    &net_device->recv_buf_gpadl_handle);
+        if (ret != 0) {
+                netdev_err(ndev,
+                        "unable to establish receive buffer's gpadl\n");
+                goto cleanup;
+        }
+
+
+        /* Notify the NetVsp of the gpadl handle */
+        init_packet = &net_device->channel_init_pkt;
+
+        memset(init_packet, 0, sizeof(struct nvsp_message));
+
+        init_packet->hdr.msg_type = NVSP_MSG1_TYPE_SEND_RECV_BUF;
+        init_packet->msg.v1_msg.send_recv_buf.
+                gpadl_handle = net_device->recv_buf_gpadl_handle;
+        init_packet->msg.v1_msg.
+                send_recv_buf.id = NETVSC_RECEIVE_BUFFER_ID;
+
+        /* Send the gpadl notification request */
+        ret = vmbus_sendpacket(device->channel, init_packet,
+                               sizeof(struct nvsp_message),
+                               (unsigned long)init_packet,
+                               VM_PKT_DATA_INBAND,
+                               VMBUS_DATA_PACKET_FLAG_COMPLETION_REQUESTED);
+        if (ret != 0) {
+                netdev_err(ndev,
+                        "unable to send receive buffer's gpadl to netvsp\n");
+                goto cleanup;
+        }
+
+        t = wait_for_completion_timeout(&net_device->channel_init_wait, 5*HZ);
+        BUG_ON(t == 0);
+
+
+        /* Check the response */
+        if (init_packet->msg.v1_msg.
+            send_recv_buf_complete.status != NVSP_STAT_SUCCESS) {
+                netdev_err(ndev, "Unable to complete receive buffer "
+                           "initialization with NetVsp - status %d\n",
+                           init_packet->msg.v1_msg.
+                           send_recv_buf_complete.status);
+                ret = -EINVAL;
+                goto cleanup;
+        }
+
+        /* Parse the response */
+
+        net_device->recv_section_cnt = init_packet->msg.
+                v1_msg.send_recv_buf_complete.num_sections;
+
+        net_device->recv_section = kmemdup(init_packet->msg.v1_msg.send_recv_buf_complete.sections,
+                                           net_device->recv_section_cnt * sizeof(struct nvsp_1_receive_buffer_section),
+                                           GFP_KERNEL);
+        if (net_device->recv_section == NULL) {
+                ret = -EINVAL;
+                goto cleanup;
+        }
+
+        /*
+         * For 1st release, there should only be 1 section that represents the
+         * entire receive buffer
+         */
+        if (net_device->recv_section_cnt != 1 ||
+            net_device->recv_section->offset != 0) {
+                ret = -EINVAL;
+                goto cleanup;
+        }
+
+        goto exit;
+
+cleanup:
+        netvsc_destroy_recv_buf(net_device);
+
+exit:
+        return ret;
+}
+
+
+static int netvsc_connect_vsp(struct hv_device *device)
+{
+        int ret, t;
+        struct netvsc_device *net_device;
+        struct nvsp_message *init_packet;
+        int ndis_version;
+        struct net_device *ndev;
+
+        net_device = get_outbound_net_device(device);
+        if (!net_device)
+                return -ENODEV;
+        ndev = net_device->ndev;
+
+        init_packet = &net_device->channel_init_pkt;
+
+        memset(init_packet, 0, sizeof(struct nvsp_message));
+        init_packet->hdr.msg_type = NVSP_MSG_TYPE_INIT;
+        init_packet->msg.init_msg.init.min_protocol_ver =
+                NVSP_MIN_PROTOCOL_VERSION;
+        init_packet->msg.init_msg.init.max_protocol_ver =
+                NVSP_MAX_PROTOCOL_VERSION;
+
+        /* Send the init request */
+        ret = vmbus_sendpacket(device->channel, init_packet,
+                               sizeof(struct nvsp_message),
+                               (unsigned long)init_packet,
+                               VM_PKT_DATA_INBAND,
+                               VMBUS_DATA_PACKET_FLAG_COMPLETION_REQUESTED);
+
+        if (ret != 0)
+                goto cleanup;
+
+        t = wait_for_completion_timeout(&net_device->channel_init_wait, 5*HZ);
+
+        if (t == 0) {
+                ret = -ETIMEDOUT;
+                goto cleanup;
+        }
+
+        if (init_packet->msg.init_msg.init_complete.status !=
+            NVSP_STAT_SUCCESS) {
+                ret = -EINVAL;
+                goto cleanup;
+        }
+
+        if (init_packet->msg.init_msg.init_complete.
+            negotiated_protocol_ver != NVSP_PROTOCOL_VERSION_1) {
+                ret = -EPROTO;
+                goto cleanup;
+        }
+        /* Send the ndis version */
+        memset(init_packet, 0, sizeof(struct nvsp_message));
+
+        ndis_version = 0x00050000;
+
+        init_packet->hdr.msg_type = NVSP_MSG1_TYPE_SEND_NDIS_VER;
+        init_packet->msg.v1_msg.
+                send_ndis_ver.ndis_major_ver =
+                                (ndis_version & 0xFFFF0000) >> 16;
+        init_packet->msg.v1_msg.
+                send_ndis_ver.ndis_minor_ver =
+                                ndis_version & 0xFFFF;
+
+        /* Send the init request */
+        ret = vmbus_sendpacket(device->channel, init_packet,
+                                sizeof(struct nvsp_message),
+                                (unsigned long)init_packet,
+                                VM_PKT_DATA_INBAND, 0);
+        if (ret != 0)
+                goto cleanup;
+
+        /* Post the big receive buffer to NetVSP */
+        ret = netvsc_init_recv_buf(device);
+
+cleanup:
+        return ret;
+}
+
+static void netvsc_disconnect_vsp(struct netvsc_device *net_device)
+{
+        netvsc_destroy_recv_buf(net_device);
+}
+
+/*
+ * netvsc_device_remove - Callback when the root bus device is removed
+ */
+int netvsc_device_remove(struct hv_device *device)
+{
+        struct netvsc_device *net_device;
+        struct hv_netvsc_packet *netvsc_packet, *pos;
+        unsigned long flags;
+
+        net_device = hv_get_drvdata(device);
+        spin_lock_irqsave(&device->channel->inbound_lock, flags);
+        net_device->destroy = true;
+        spin_unlock_irqrestore(&device->channel->inbound_lock, flags);
+
+        /* Wait for all send completions */
+        while (atomic_read(&net_device->num_outstanding_sends)) {
+                dev_info(&device->device,
+                        "waiting for %d requests to complete...\n",
+                        atomic_read(&net_device->num_outstanding_sends));
+                udelay(100);
+        }
+
+        netvsc_disconnect_vsp(net_device);
+
+        /*
+         * Since we have already drained, we don't need to busy wait
+         * as was done in final_release_stor_device()
+         * Note that we cannot set the ext pointer to NULL until
+         * we have drained - to drain the outgoing packets, we need to
+         * allow incoming packets.
+         */
+
+        spin_lock_irqsave(&device->channel->inbound_lock, flags);
+        hv_set_drvdata(device, NULL);
+        spin_unlock_irqrestore(&device->channel->inbound_lock, flags);
+
+        /*
+         * At this point, no one should be accessing net_device
+         * except in here
+         */
+        dev_notice(&device->device, "net device safe to remove\n");
+
+        /* Now, we can close the channel safely */
+        vmbus_close(device->channel);
+
+        /* Release all resources */
+        list_for_each_entry_safe(netvsc_packet, pos,
+                                 &net_device->recv_pkt_list, list_ent) {
+                list_del(&netvsc_packet->list_ent);
+                kfree(netvsc_packet);
+        }
+
+        kfree(net_device);
+        return 0;
+}
+
+static void netvsc_send_completion(struct hv_device *device,
+                                   struct vmpacket_descriptor *packet)
+{
+        struct netvsc_device *net_device;
+        struct nvsp_message *nvsp_packet;
+        struct hv_netvsc_packet *nvsc_packet;
+        struct net_device *ndev;
+
+        net_device = get_inbound_net_device(device);
+        if (!net_device)
+                return;
+        ndev = net_device->ndev;
+
+        nvsp_packet = (struct nvsp_message *)((unsigned long)packet +
+                        (packet->offset8 << 3));
+
+        if ((nvsp_packet->hdr.msg_type == NVSP_MSG_TYPE_INIT_COMPLETE) ||
+            (nvsp_packet->hdr.msg_type ==
+             NVSP_MSG1_TYPE_SEND_RECV_BUF_COMPLETE) ||
+            (nvsp_packet->hdr.msg_type ==
+             NVSP_MSG1_TYPE_SEND_SEND_BUF_COMPLETE)) {
+                /* Copy the response back */
+                memcpy(&net_device->channel_init_pkt, nvsp_packet,
+                       sizeof(struct nvsp_message));
+                complete(&net_device->channel_init_wait);
+        } else if (nvsp_packet->hdr.msg_type ==
+                   NVSP_MSG1_TYPE_SEND_RNDIS_PKT_COMPLETE) {
+                /* Get the send context */
+                nvsc_packet = (struct hv_netvsc_packet *)(unsigned long)
+                        packet->trans_id;
+
+                /* Notify the layer above us */
+                nvsc_packet->completion.send.send_completion(
+                        nvsc_packet->completion.send.send_completion_ctx);
+
+                atomic_dec(&net_device->num_outstanding_sends);
+        } else {
+                netdev_err(ndev, "Unknown send completion packet type- "
+                           "%d received!!\n", nvsp_packet->hdr.msg_type);
+        }
+
+}
+
+int netvsc_send(struct hv_device *device,
+                        struct hv_netvsc_packet *packet)
+{
+        struct netvsc_device *net_device;
+        int ret = 0;
+        struct nvsp_message sendMessage;
+        struct net_device *ndev;
+
+        net_device = get_outbound_net_device(device);
+        if (!net_device)
+                return -ENODEV;
+        ndev = net_device->ndev;
+
+        sendMessage.hdr.msg_type = NVSP_MSG1_TYPE_SEND_RNDIS_PKT;
+        if (packet->is_data_pkt) {
+                /* 0 is RMC_DATA; */
+                sendMessage.msg.v1_msg.send_rndis_pkt.channel_type = 0;
+        } else {
+                /* 1 is RMC_CONTROL; */
+                sendMessage.msg.v1_msg.send_rndis_pkt.channel_type = 1;
+        }
+
+        /* Not using send buffer section */
+        sendMessage.msg.v1_msg.send_rndis_pkt.send_buf_section_index =
+                0xFFFFFFFF;
+        sendMessage.msg.v1_msg.send_rndis_pkt.send_buf_section_size = 0;
+
+        if (packet->page_buf_cnt) {
+                ret = vmbus_sendpacket_pagebuffer(device->channel,
+                                                  packet->page_buf,
+                                                  packet->page_buf_cnt,
+                                                  &sendMessage,
+                                                  sizeof(struct nvsp_message),
+                                                  (unsigned long)packet);
+        } else {
+                ret = vmbus_sendpacket(device->channel, &sendMessage,
+                                sizeof(struct nvsp_message),
+                                (unsigned long)packet,
+                                VM_PKT_DATA_INBAND,
+                                VMBUS_DATA_PACKET_FLAG_COMPLETION_REQUESTED);
+
+        }
+
+        if (ret != 0)
+                netdev_err(ndev, "Unable to send packet %p ret %d\n",
+                           packet, ret);
+        else
+                atomic_inc(&net_device->num_outstanding_sends);
+
+        return ret;
+}
+
+static void netvsc_send_recv_completion(struct hv_device *device,
+                                        u64 transaction_id)
+{
+        struct nvsp_message recvcompMessage;
+        int retries = 0;
+        int ret;
+        struct net_device *ndev;
+        struct netvsc_device *net_device = hv_get_drvdata(device);
+
+        ndev = net_device->ndev;
+
+        recvcompMessage.hdr.msg_type =
+                                NVSP_MSG1_TYPE_SEND_RNDIS_PKT_COMPLETE;
+
+        /* FIXME: Pass in the status */
+        recvcompMessage.msg.v1_msg.send_rndis_pkt_complete.status =
+                NVSP_STAT_SUCCESS;
+
+retry_send_cmplt:
+        /* Send the completion */
+        ret = vmbus_sendpacket(device->channel, &recvcompMessage,
+                               sizeof(struct nvsp_message), transaction_id,
+                               VM_PKT_COMP, 0);
+        if (ret == 0) {
+                /* success */
+                /* no-op */
+        } else if (ret == -EAGAIN) {
+                /* no more room...wait a bit and attempt to retry 3 times */
+                retries++;
+                netdev_err(ndev, "unable to send receive completion pkt"
+                        " (tid %llx)...retrying %d\n", transaction_id, retries);
+
+                if (retries < 4) {
+                        udelay(100);
+                        goto retry_send_cmplt;
+                } else {
+                        netdev_err(ndev, "unable to send receive "
+                                "completion pkt (tid %llx)...give up retrying\n",
+                                transaction_id);
+                }
+        } else {
+                netdev_err(ndev, "unable to send receive "
+                        "completion pkt - %llx\n", transaction_id);
+        }
+}
+
+/* Send a receive completion packet to RNDIS device (ie NetVsp) */
+static void netvsc_receive_completion(void *context)
+{
+        struct hv_netvsc_packet *packet = context;
+        struct hv_device *device = (struct hv_device *)packet->device;
+        struct netvsc_device *net_device;
+        u64 transaction_id = 0;
+        bool fsend_receive_comp = false;
+        unsigned long flags;
+        struct net_device *ndev;
+
+        /*
+         * Even though it seems logical to do a GetOutboundNetDevice() here to
+         * send out receive completion, we are using GetInboundNetDevice()
+         * since we may have disable outbound traffic already.
+         */
+        net_device = get_inbound_net_device(device);
+        if (!net_device)
+                return;
+        ndev = net_device->ndev;
+
+        /* Overloading use of the lock. */
+        spin_lock_irqsave(&net_device->recv_pkt_list_lock, flags);
+
+        packet->xfer_page_pkt->count--;
+
+        /*
+         * Last one in the line that represent 1 xfer page packet.
+         * Return the xfer page packet itself to the freelist
+         */
+        if (packet->xfer_page_pkt->count == 0) {
+                fsend_receive_comp = true;
+                transaction_id = packet->completion.recv.recv_completion_tid;
+                list_add_tail(&packet->xfer_page_pkt->list_ent,
+                              &net_device->recv_pkt_list);
+
+        }
+
+        /* Put the packet back */
+        list_add_tail(&packet->list_ent, &net_device->recv_pkt_list);
+        spin_unlock_irqrestore(&net_device->recv_pkt_list_lock, flags);
+
+        /* Send a receive completion for the xfer page packet */
+        if (fsend_receive_comp)
+                netvsc_send_recv_completion(device, transaction_id);
+
+}
+
+static void netvsc_receive(struct hv_device *device,
+                            struct vmpacket_descriptor *packet)
+{
+        struct netvsc_device *net_device;
+        struct vmtransfer_page_packet_header *vmxferpage_packet;
+        struct nvsp_message *nvsp_packet;
+        struct hv_netvsc_packet *netvsc_packet = NULL;
+        unsigned long start;
+        unsigned long end, end_virtual;
+        /* struct netvsc_driver *netvscDriver; */
+        struct xferpage_packet *xferpage_packet = NULL;
+        int i, j;
+        int count = 0, bytes_remain = 0;
+        unsigned long flags;
+        struct net_device *ndev;
+
+        LIST_HEAD(listHead);
+
+        net_device = get_inbound_net_device(device);
+        if (!net_device)
+                return;
+        ndev = net_device->ndev;
+
+        /*
+         * All inbound packets other than send completion should be xfer page
+         * packet
+         */
+        if (packet->type != VM_PKT_DATA_USING_XFER_PAGES) {
+                netdev_err(ndev, "Unknown packet type received - %d\n",
+                           packet->type);
+                return;
+        }
+
+        nvsp_packet = (struct nvsp_message *)((unsigned long)packet +
+                        (packet->offset8 << 3));
+
+        /* Make sure this is a valid nvsp packet */
+        if (nvsp_packet->hdr.msg_type !=
+            NVSP_MSG1_TYPE_SEND_RNDIS_PKT) {
+                netdev_err(ndev, "Unknown nvsp packet type received-"
+                        " %d\n", nvsp_packet->hdr.msg_type);
+                return;
+        }
+
+        vmxferpage_packet = (struct vmtransfer_page_packet_header *)packet;
+
+        if (vmxferpage_packet->xfer_pageset_id != NETVSC_RECEIVE_BUFFER_ID) {
+                netdev_err(ndev, "Invalid xfer page set id - "
+                           "expecting %x got %x\n", NETVSC_RECEIVE_BUFFER_ID,
+                           vmxferpage_packet->xfer_pageset_id);
+                return;
+        }
+
+        /*
+         * Grab free packets (range count + 1) to represent this xfer
+         * page packet. +1 to represent the xfer page packet itself.
+         * We grab it here so that we know exactly how many we can
+         * fulfil
+         */
+        spin_lock_irqsave(&net_device->recv_pkt_list_lock, flags);
+        while (!list_empty(&net_device->recv_pkt_list)) {
+                list_move_tail(net_device->recv_pkt_list.next, &listHead);
+                if (++count == vmxferpage_packet->range_cnt + 1)
+                        break;
+        }
+        spin_unlock_irqrestore(&net_device->recv_pkt_list_lock, flags);
+
+        /*
+         * We need at least 2 netvsc pkts (1 to represent the xfer
+         * page and at least 1 for the range) i.e. we can handled
+         * some of the xfer page packet ranges...
+         */
+        if (count < 2) {
+                netdev_err(ndev, "Got only %d netvsc pkt...needed "
+                        "%d pkts. Dropping this xfer page packet completely!\n",
+                        count, vmxferpage_packet->range_cnt + 1);
+
+                /* Return it to the freelist */
+                spin_lock_irqsave(&net_device->recv_pkt_list_lock, flags);
+                for (i = count; i != 0; i--) {
+                        list_move_tail(listHead.next,
+                                       &net_device->recv_pkt_list);
+                }
+                spin_unlock_irqrestore(&net_device->recv_pkt_list_lock,
+                                       flags);
+
+                netvsc_send_recv_completion(device,
+                                            vmxferpage_packet->d.trans_id);
+
+                return;
+        }
+
+        /* Remove the 1st packet to represent the xfer page packet itself */
+        xferpage_packet = (struct xferpage_packet *)listHead.next;
+        list_del(&xferpage_packet->list_ent);
+
+        /* This is how much we can satisfy */
+        xferpage_packet->count = count - 1;
+
+        if (xferpage_packet->count != vmxferpage_packet->range_cnt) {
+                netdev_err(ndev, "Needed %d netvsc pkts to satisfy "
+                        "this xfer page...got %d\n",
+                        vmxferpage_packet->range_cnt, xferpage_packet->count);
+        }
+
+        /* Each range represents 1 RNDIS pkt that contains 1 ethernet frame */
+        for (i = 0; i < (count - 1); i++) {
+                netvsc_packet = (struct hv_netvsc_packet *)listHead.next;
+                list_del(&netvsc_packet->list_ent);
+
+                /* Initialize the netvsc packet */
+                netvsc_packet->xfer_page_pkt = xferpage_packet;
+                netvsc_packet->completion.recv.recv_completion =
+                                        netvsc_receive_completion;
+                netvsc_packet->completion.recv.recv_completion_ctx =
+                                        netvsc_packet;
+                netvsc_packet->device = device;
+                /* Save this so that we can send it back */
+                netvsc_packet->completion.recv.recv_completion_tid =
+                                        vmxferpage_packet->d.trans_id;
+
+                netvsc_packet->total_data_buflen =
+                                        vmxferpage_packet->ranges[i].byte_count;
+                netvsc_packet->page_buf_cnt = 1;
+
+                netvsc_packet->page_buf[0].len =
+                                        vmxferpage_packet->ranges[i].byte_count;
+
+                start = virt_to_phys((void *)((unsigned long)net_device->
+                recv_buf + vmxferpage_packet->ranges[i].byte_offset));
+
+                netvsc_packet->page_buf[0].pfn = start >> PAGE_SHIFT;
+                end_virtual = (unsigned long)net_device->recv_buf
+                    + vmxferpage_packet->ranges[i].byte_offset
+                    + vmxferpage_packet->ranges[i].byte_count - 1;
+                end = virt_to_phys((void *)end_virtual);
+
+                /* Calculate the page relative offset */
+                netvsc_packet->page_buf[0].offset =
+                        vmxferpage_packet->ranges[i].byte_offset &
+                        (PAGE_SIZE - 1);
+                if ((end >> PAGE_SHIFT) != (start >> PAGE_SHIFT)) {
+                        /* Handle frame across multiple pages: */
+                        netvsc_packet->page_buf[0].len =
+                                (netvsc_packet->page_buf[0].pfn <<
+                                 PAGE_SHIFT)
+                                + PAGE_SIZE - start;
+                        bytes_remain = netvsc_packet->total_data_buflen -
+                                        netvsc_packet->page_buf[0].len;
+                        for (j = 1; j < NETVSC_PACKET_MAXPAGE; j++) {
+                                netvsc_packet->page_buf[j].offset = 0;
+                                if (bytes_remain <= PAGE_SIZE) {
+                                        netvsc_packet->page_buf[j].len =
+                                                bytes_remain;
+                                        bytes_remain = 0;
+                                } else {
+                                        netvsc_packet->page_buf[j].len =
+                                                PAGE_SIZE;
+                                        bytes_remain -= PAGE_SIZE;
+                                }
+                                netvsc_packet->page_buf[j].pfn =
+                                    virt_to_phys((void *)(end_virtual -
+                                                bytes_remain)) >> PAGE_SHIFT;
+                                netvsc_packet->page_buf_cnt++;
+                                if (bytes_remain == 0)
+                                        break;
+                        }
+                }
+
+                /* Pass it to the upper layer */
+                rndis_filter_receive(device, netvsc_packet);
+
+                netvsc_receive_completion(netvsc_packet->
+                                completion.recv.recv_completion_ctx);
+        }
+
+}
+
+static void netvsc_channel_cb(void *context)
+{
+        int ret;
+        struct hv_device *device = context;
+        struct netvsc_device *net_device;
+        u32 bytes_recvd;
+        u64 request_id;
+        unsigned char *packet;
+        struct vmpacket_descriptor *desc;
+        unsigned char *buffer;
+        int bufferlen = NETVSC_PACKET_SIZE;
+        struct net_device *ndev;
+
+        packet = kzalloc(NETVSC_PACKET_SIZE * sizeof(unsigned char),
+                         GFP_ATOMIC);
+        if (!packet)
+                return;
+        buffer = packet;
+
+        net_device = get_inbound_net_device(device);
+        if (!net_device)
+                goto out;
+        ndev = net_device->ndev;
+
+        do {
+                ret = vmbus_recvpacket_raw(device->channel, buffer, bufferlen,
+                                           &bytes_recvd, &request_id);
+                if (ret == 0) {
+                        if (bytes_recvd > 0) {
+                                desc = (struct vmpacket_descriptor *)buffer;
+                                switch (desc->type) {
+                                case VM_PKT_COMP:
+                                        netvsc_send_completion(device, desc);
+                                        break;
+
+                                case VM_PKT_DATA_USING_XFER_PAGES:
+                                        netvsc_receive(device, desc);
+                                        break;
+
+                                default:
+                                        netdev_err(ndev,
+                                                   "unhandled packet type %d, "
+                                                   "tid %llx len %d\n",
+                                                   desc->type, request_id,
+                                                   bytes_recvd);
+                                        break;
+                                }
+
+                                /* reset */
+                                if (bufferlen > NETVSC_PACKET_SIZE) {
+                                        kfree(buffer);
+                                        buffer = packet;
+                                        bufferlen = NETVSC_PACKET_SIZE;
+                                }
+                        } else {
+                                /* reset */
+                                if (bufferlen > NETVSC_PACKET_SIZE) {
+                                        kfree(buffer);
+                                        buffer = packet;
+                                        bufferlen = NETVSC_PACKET_SIZE;
+                                }
+
+                                break;
+                        }
+                } else if (ret == -ENOBUFS) {
+                        /* Handle large packet */
+                        buffer = kmalloc(bytes_recvd, GFP_ATOMIC);
+                        if (buffer == NULL) {
+                                /* Try again next time around */
+                                netdev_err(ndev,
+                                           "unable to allocate buffer of size "
+                                           "(%d)!!\n", bytes_recvd);
+                                break;
+                        }
+
+                        bufferlen = bytes_recvd;
+                }
+        } while (1);
+
+out:
+        kfree(buffer);
+        return;
+}
+
+/*
+ * netvsc_device_add - Callback when the device belonging to this
+ * driver is added
+ */
+int netvsc_device_add(struct hv_device *device, void *additional_info)
+{
+        int ret = 0;
+        int i;
+        int ring_size =
+        ((struct netvsc_device_info *)additional_info)->ring_size;
+        struct netvsc_device *net_device;
+        struct hv_netvsc_packet *packet, *pos;
+        struct net_device *ndev;
+
+        net_device = alloc_net_device(device);
+        if (!net_device) {
+                ret = -ENOMEM;
+                goto cleanup;
+        }
+
+        /*
+         * Coming into this function, struct net_device * is
+         * registered as the driver private data.
+         * In alloc_net_device(), we register struct netvsc_device *
+         * as the driver private data and stash away struct net_device *
+         * in struct netvsc_device *.
+         */
+        ndev = net_device->ndev;
+
+        /* Initialize the NetVSC channel extension */
+        net_device->recv_buf_size = NETVSC_RECEIVE_BUFFER_SIZE;
+        spin_lock_init(&net_device->recv_pkt_list_lock);
+
+        INIT_LIST_HEAD(&net_device->recv_pkt_list);
+
+        for (i = 0; i < NETVSC_RECEIVE_PACKETLIST_COUNT; i++) {
+                packet = kzalloc(sizeof(struct hv_netvsc_packet) +
+                                 (NETVSC_RECEIVE_SG_COUNT *
+                                  sizeof(struct hv_page_buffer)), GFP_KERNEL);
+                if (!packet)
+                        break;
+
+                list_add_tail(&packet->list_ent,
+                              &net_device->recv_pkt_list);
+        }
+        init_completion(&net_device->channel_init_wait);
+
+        /* Open the channel */
+        ret = vmbus_open(device->channel, ring_size * PAGE_SIZE,
+                         ring_size * PAGE_SIZE, NULL, 0,
+                         netvsc_channel_cb, device);
+
+        if (ret != 0) {
+                netdev_err(ndev, "unable to open channel: %d\n", ret);
+                goto cleanup;
+        }
+
+        /* Channel is opened */
+        pr_info("hv_netvsc channel opened successfully\n");
+
+        /* Connect with the NetVsp */
+        ret = netvsc_connect_vsp(device);
+        if (ret != 0) {
+                netdev_err(ndev,
+                        "unable to connect to NetVSP - %d\n", ret);
+                goto close;
+        }
+
+        return ret;
+
+close:
+        /* Now, we can close the channel safely */
+        vmbus_close(device->channel);
+
+cleanup:
+
+        if (net_device) {
+                list_for_each_entry_safe(packet, pos,
+                                         &net_device->recv_pkt_list,
+                                         list_ent) {
+                        list_del(&packet->list_ent);
+                        kfree(packet);
+                }
+
+                kfree(net_device);
+        }
+
+        return ret;
+}
diff --git a/drivers/net/hyperv/netvsc_drv.c b/drivers/net/hyperv/netvsc_drv.c
new file mode 100644
index 000000000000..93b0e91cbf98
--- /dev/null
+++ b/drivers/net/hyperv/netvsc_drv.c
@@ -0,0 +1,456 @@
+/*
+ * Copyright (c) 2009, 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, write to the Free Software Foundation, Inc., 59 Temple
+ * Place - Suite 330, Boston, MA 02111-1307 USA.
+ *
+ * Authors:
+ *   Haiyang Zhang <haiyangz@microsoft.com>
+ *   Hank Janssen  <hjanssen@microsoft.com>
+ */
+#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
+
+#include <linux/init.h>
+#include <linux/atomic.h>
+#include <linux/module.h>
+#include <linux/highmem.h>
+#include <linux/device.h>
+#include <linux/io.h>
+#include <linux/delay.h>
+#include <linux/netdevice.h>
+#include <linux/inetdevice.h>
+#include <linux/etherdevice.h>
+#include <linux/skbuff.h>
+#include <linux/in.h>
+#include <linux/slab.h>
+#include <net/arp.h>
+#include <net/route.h>
+#include <net/sock.h>
+#include <net/pkt_sched.h>
+
+#include "hyperv_net.h"
+
+struct net_device_context {
+        /* point back to our device context */
+        struct hv_device *device_ctx;
+        atomic_t avail;
+        struct delayed_work dwork;
+};
+
+
+#define PACKET_PAGES_LOWATER  8
+/* Need this many pages to handle worst case fragmented packet */
+#define PACKET_PAGES_HIWATER  (MAX_SKB_FRAGS + 2)
+
+static int ring_size = 128;
+module_param(ring_size, int, S_IRUGO);
+MODULE_PARM_DESC(ring_size, "Ring buffer size (# of pages)");
+
+/* no-op so the netdev core doesn't return -EINVAL when modifying the the
+ * multicast address list in SIOCADDMULTI. hv is setup to get all multicast
+ * when it calls RndisFilterOnOpen() */
+static void netvsc_set_multicast_list(struct net_device *net)
+{
+}
+
+static int netvsc_open(struct net_device *net)
+{
+        struct net_device_context *net_device_ctx = netdev_priv(net);
+        struct hv_device *device_obj = net_device_ctx->device_ctx;
+        int ret = 0;
+
+        /* Open up the device */
+        ret = rndis_filter_open(device_obj);
+        if (ret != 0) {
+                netdev_err(net, "unable to open device (ret %d).\n", ret);
+                return ret;
+        }
+
+        netif_start_queue(net);
+
+        return ret;
+}
+
+static int netvsc_close(struct net_device *net)
+{
+        struct net_device_context *net_device_ctx = netdev_priv(net);
+        struct hv_device *device_obj = net_device_ctx->device_ctx;
+        int ret;
+
+        netif_stop_queue(net);
+
+        ret = rndis_filter_close(device_obj);
+        if (ret != 0)
+                netdev_err(net, "unable to close device (ret %d).\n", ret);
+
+        return ret;
+}
+
+static void netvsc_xmit_completion(void *context)
+{
+        struct hv_netvsc_packet *packet = (struct hv_netvsc_packet *)context;
+        struct sk_buff *skb = (struct sk_buff *)
+                (unsigned long)packet->completion.send.send_completion_tid;
+
+        kfree(packet);
+
+        if (skb) {
+                struct net_device *net = skb->dev;
+                struct net_device_context *net_device_ctx = netdev_priv(net);
+                unsigned int num_pages = skb_shinfo(skb)->nr_frags + 2;
+
+                dev_kfree_skb_any(skb);
+
+                atomic_add(num_pages, &net_device_ctx->avail);
+                if (atomic_read(&net_device_ctx->avail) >=
+                                PACKET_PAGES_HIWATER)
+                        netif_wake_queue(net);
+        }
+}
+
+static int netvsc_start_xmit(struct sk_buff *skb, struct net_device *net)
+{
+        struct net_device_context *net_device_ctx = netdev_priv(net);
+        struct hv_netvsc_packet *packet;
+        int ret;
+        unsigned int i, num_pages;
+
+        /* Add 1 for skb->data and additional one for RNDIS */
+        num_pages = skb_shinfo(skb)->nr_frags + 1 + 1;
+        if (num_pages > atomic_read(&net_device_ctx->avail))
+                return NETDEV_TX_BUSY;
+
+        /* Allocate a netvsc packet based on # of frags. */
+        packet = kzalloc(sizeof(struct hv_netvsc_packet) +
+                         (num_pages * sizeof(struct hv_page_buffer)) +
+                         sizeof(struct rndis_filter_packet), GFP_ATOMIC);
+        if (!packet) {
+                /* out of memory, drop packet */
+                netdev_err(net, "unable to allocate hv_netvsc_packet\n");
+
+                dev_kfree_skb(skb);
+                net->stats.tx_dropped++;
+                return NETDEV_TX_BUSY;
+        }
+
+        packet->extension = (void *)(unsigned long)packet +
+                                sizeof(struct hv_netvsc_packet) +
+                                    (num_pages * sizeof(struct hv_page_buffer));
+
+        /* Setup the rndis header */
+        packet->page_buf_cnt = num_pages;
+
+        /* Initialize it from the skb */
+        packet->total_data_buflen       = skb->len;
+
+        /* Start filling in the page buffers starting after RNDIS buffer. */
+        packet->page_buf[1].pfn = virt_to_phys(skb->data) >> PAGE_SHIFT;
+        packet->page_buf[1].offset
+                = (unsigned long)skb->data & (PAGE_SIZE - 1);
+        packet->page_buf[1].len = skb_headlen(skb);
+
+        /* Additional fragments are after SKB data */
+        for (i = 0; i < skb_shinfo(skb)->nr_frags; i++) {
+                const skb_frag_t *f = &skb_shinfo(skb)->frags[i];
+
+                packet->page_buf[i+2].pfn = page_to_pfn(skb_frag_page(f));
+                packet->page_buf[i+2].offset = f->page_offset;
+                packet->page_buf[i+2].len = skb_frag_size(f);
+        }
+
+        /* Set the completion routine */
+        packet->completion.send.send_completion = netvsc_xmit_completion;
+        packet->completion.send.send_completion_ctx = packet;
+        packet->completion.send.send_completion_tid = (unsigned long)skb;
+
+        ret = rndis_filter_send(net_device_ctx->device_ctx,
+                                  packet);
+        if (ret == 0) {
+                net->stats.tx_bytes += skb->len;
+                net->stats.tx_packets++;
+
+                atomic_sub(num_pages, &net_device_ctx->avail);
+                if (atomic_read(&net_device_ctx->avail) < PACKET_PAGES_LOWATER)
+                        netif_stop_queue(net);
+        } else {
+                /* we are shutting down or bus overloaded, just drop packet */
+                net->stats.tx_dropped++;
+                kfree(packet);
+                dev_kfree_skb_any(skb);
+        }
+
+        return ret ? NETDEV_TX_BUSY : NETDEV_TX_OK;
+}
+
+/*
+ * netvsc_linkstatus_callback - Link up/down notification
+ */
+void netvsc_linkstatus_callback(struct hv_device *device_obj,
+                                       unsigned int status)
+{
+        struct net_device *net;
+        struct net_device_context *ndev_ctx;
+        struct netvsc_device *net_device;
+
+        net_device = hv_get_drvdata(device_obj);
+        net = net_device->ndev;
+
+        if (!net) {
+                netdev_err(net, "got link status but net device "
+                                "not initialized yet\n");
+                return;
+        }
+
+        if (status == 1) {
+                netif_carrier_on(net);
+                netif_wake_queue(net);
+                ndev_ctx = netdev_priv(net);
+                schedule_delayed_work(&ndev_ctx->dwork, 0);
+                schedule_delayed_work(&ndev_ctx->dwork, msecs_to_jiffies(20));
+        } else {
+                netif_carrier_off(net);
+                netif_stop_queue(net);
+        }
+}
+
+/*
+ * netvsc_recv_callback -  Callback when we receive a packet from the
+ * "wire" on the specified device.
+ */
+int netvsc_recv_callback(struct hv_device *device_obj,
+                                struct hv_netvsc_packet *packet)
+{
+        struct net_device *net = dev_get_drvdata(&device_obj->device);
+        struct sk_buff *skb;
+        void *data;
+        int i;
+        unsigned long flags;
+        struct netvsc_device *net_device;
+
+        net_device = hv_get_drvdata(device_obj);
+        net = net_device->ndev;
+
+        if (!net) {
+                netdev_err(net, "got receive callback but net device"
+                        " not initialized yet\n");
+                return 0;
+        }
+
+        /* Allocate a skb - TODO direct I/O to pages? */
+        skb = netdev_alloc_skb_ip_align(net, packet->total_data_buflen);
+        if (unlikely(!skb)) {
+                ++net->stats.rx_dropped;
+                return 0;
+        }
+
+        /* for kmap_atomic */
+        local_irq_save(flags);
+
+        /*
+         * Copy to skb. This copy is needed here since the memory pointed by
+         * hv_netvsc_packet cannot be deallocated
+         */
+        for (i = 0; i < packet->page_buf_cnt; i++) {
+                data = kmap_atomic(pfn_to_page(packet->page_buf[i].pfn),
+                                               KM_IRQ1);
+                data = (void *)(unsigned long)data +
+                                packet->page_buf[i].offset;
+
+                memcpy(skb_put(skb, packet->page_buf[i].len), data,
+                       packet->page_buf[i].len);
+
+                kunmap_atomic((void *)((unsigned long)data -
+                                       packet->page_buf[i].offset), KM_IRQ1);
+        }
+
+        local_irq_restore(flags);
+
+        skb->protocol = eth_type_trans(skb, net);
+        skb->ip_summed = CHECKSUM_NONE;
+
+        net->stats.rx_packets++;
+        net->stats.rx_bytes += skb->len;
+
+        /*
+         * Pass the skb back up. Network stack will deallocate the skb when it
+         * is done.
+         * TODO - use NAPI?
+         */
+        netif_rx(skb);
+
+        return 0;
+}
+
+static void netvsc_get_drvinfo(struct net_device *net,
+                               struct ethtool_drvinfo *info)
+{
+        strcpy(info->driver, "hv_netvsc");
+        strcpy(info->version, HV_DRV_VERSION);
+        strcpy(info->fw_version, "N/A");
+}
+
+static const struct ethtool_ops ethtool_ops = {
+        .get_drvinfo    = netvsc_get_drvinfo,
+        .get_link       = ethtool_op_get_link,
+};
+
+static const struct net_device_ops device_ops = {
+        .ndo_open =                     netvsc_open,
+        .ndo_stop =                     netvsc_close,
+        .ndo_start_xmit =               netvsc_start_xmit,
+        .ndo_set_rx_mode =              netvsc_set_multicast_list,
+        .ndo_change_mtu =               eth_change_mtu,
+        .ndo_validate_addr =            eth_validate_addr,
+        .ndo_set_mac_address =          eth_mac_addr,
+};
+
+/*
+ * Send GARP packet to network peers after migrations.
+ * After Quick Migration, the network is not immediately operational in the
+ * current context when receiving RNDIS_STATUS_MEDIA_CONNECT event. So, add
+ * another netif_notify_peers() into a delayed work, otherwise GARP packet
+ * will not be sent after quick migration, and cause network disconnection.
+ */
+static void netvsc_send_garp(struct work_struct *w)
+{
+        struct net_device_context *ndev_ctx;
+        struct net_device *net;
+        struct netvsc_device *net_device;
+
+        ndev_ctx = container_of(w, struct net_device_context, dwork.work);
+        net_device = hv_get_drvdata(ndev_ctx->device_ctx);
+        net = net_device->ndev;
+        netif_notify_peers(net);
+}
+
+
+static int netvsc_probe(struct hv_device *dev,
+                        const struct hv_vmbus_device_id *dev_id)
+{
+        struct net_device *net = NULL;
+        struct net_device_context *net_device_ctx;
+        struct netvsc_device_info device_info;
+        int ret;
+
+        net = alloc_etherdev(sizeof(struct net_device_context));
+        if (!net)
+                return -ENOMEM;
+
+        /* Set initial state */
+        netif_carrier_off(net);
+
+        net_device_ctx = netdev_priv(net);
+        net_device_ctx->device_ctx = dev;
+        atomic_set(&net_device_ctx->avail, ring_size);
+        hv_set_drvdata(dev, net);
+        INIT_DELAYED_WORK(&net_device_ctx->dwork, netvsc_send_garp);
+
+        net->netdev_ops = &device_ops;
+
+        /* TODO: Add GSO and Checksum offload */
+        net->hw_features = NETIF_F_SG;
+        net->features = NETIF_F_SG;
+
+        SET_ETHTOOL_OPS(net, &ethtool_ops);
+        SET_NETDEV_DEV(net, &dev->device);
+
+        ret = register_netdev(net);
+        if (ret != 0) {
+                pr_err("Unable to register netdev.\n");
+                free_netdev(net);
+                goto out;
+        }
+
+        /* Notify the netvsc driver of the new device */
+        device_info.ring_size = ring_size;
+        ret = rndis_filter_device_add(dev, &device_info);
+        if (ret != 0) {
+                netdev_err(net, "unable to add netvsc device (ret %d)\n", ret);
+                unregister_netdev(net);
+                free_netdev(net);
+                hv_set_drvdata(dev, NULL);
+                return ret;
+        }
+        memcpy(net->dev_addr, device_info.mac_adr, ETH_ALEN);
+
+        netif_carrier_on(net);
+
+out:
+        return ret;
+}
+
+static int netvsc_remove(struct hv_device *dev)
+{
+        struct net_device *net;
+        struct net_device_context *ndev_ctx;
+        struct netvsc_device *net_device;
+
+        net_device = hv_get_drvdata(dev);
+        net = net_device->ndev;
+
+        if (net == NULL) {
+                dev_err(&dev->device, "No net device to remove\n");
+                return 0;
+        }
+
+        ndev_ctx = netdev_priv(net);
+        cancel_delayed_work_sync(&ndev_ctx->dwork);
+
+        /* Stop outbound asap */
+        netif_stop_queue(net);
+
+        unregister_netdev(net);
+
+        /*
+         * Call to the vsc driver to let it know that the device is being
+         * removed
+         */
+        rndis_filter_device_remove(dev);
+
+        free_netdev(net);
+        return 0;
+}
+
+static const struct hv_vmbus_device_id id_table[] = {
+        /* Network guid */
+        { VMBUS_DEVICE(0x63, 0x51, 0x61, 0xF8, 0x3E, 0xDF, 0xc5, 0x46,
+                       0x91, 0x3F, 0xF2, 0xD2, 0xF9, 0x65, 0xED, 0x0E) },
+        { },
+};
+
+MODULE_DEVICE_TABLE(vmbus, id_table);
+
+/* The one and only one */
+static struct  hv_driver netvsc_drv = {
+        .name = "netvsc",
+        .id_table = id_table,
+        .probe = netvsc_probe,
+        .remove = netvsc_remove,
+};
+
+static void __exit netvsc_drv_exit(void)
+{
+        vmbus_driver_unregister(&netvsc_drv);
+}
+
+static int __init netvsc_drv_init(void)
+{
+        return vmbus_driver_register(&netvsc_drv);
+}
+
+MODULE_LICENSE("GPL");
+MODULE_VERSION(HV_DRV_VERSION);
+MODULE_DESCRIPTION("Microsoft Hyper-V network driver");
+
+module_init(netvsc_drv_init);
+module_exit(netvsc_drv_exit);
diff --git a/drivers/net/hyperv/rndis_filter.c b/drivers/net/hyperv/rndis_filter.c
new file mode 100644
index 000000000000..bafccb360041
--- /dev/null
+++ b/drivers/net/hyperv/rndis_filter.c
@@ -0,0 +1,855 @@
+/*
+ * Copyright (c) 2009, 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, write to the Free Software Foundation, Inc., 59 Temple
+ * Place - Suite 330, Boston, MA 02111-1307 USA.
+ *
+ * Authors:
+ *   Haiyang Zhang <haiyangz@microsoft.com>
+ *   Hank Janssen  <hjanssen@microsoft.com>
+ */
+#include <linux/kernel.h>
+#include <linux/sched.h>
+#include <linux/wait.h>
+#include <linux/highmem.h>
+#include <linux/slab.h>
+#include <linux/io.h>
+#include <linux/if_ether.h>
+#include <linux/netdevice.h>
+
+#include "hyperv_net.h"
+
+
+enum rndis_device_state {
+        RNDIS_DEV_UNINITIALIZED = 0,
+        RNDIS_DEV_INITIALIZING,
+        RNDIS_DEV_INITIALIZED,
+        RNDIS_DEV_DATAINITIALIZED,
+};
+
+struct rndis_device {
+        struct netvsc_device *net_dev;
+
+        enum rndis_device_state state;
+        bool link_state;
+        atomic_t new_req_id;
+
+        spinlock_t request_lock;
+        struct list_head req_list;
+
+        unsigned char hw_mac_adr[ETH_ALEN];
+};
+
+struct rndis_request {
+        struct list_head list_ent;
+        struct completion  wait_event;
+
+        /*
+         * FIXME: We assumed a fixed size response here. If we do ever need to
+         * handle a bigger response, we can either define a max response
+         * message or add a response buffer variable above this field
+         */
+        struct rndis_message response_msg;
+
+        /* Simplify allocation by having a netvsc packet inline */
+        struct hv_netvsc_packet pkt;
+        struct hv_page_buffer buf;
+        /* FIXME: We assumed a fixed size request here. */
+        struct rndis_message request_msg;
+};
+
+static void rndis_filter_send_completion(void *ctx);
+
+static void rndis_filter_send_request_completion(void *ctx);
+
+
+
+static struct rndis_device *get_rndis_device(void)
+{
+        struct rndis_device *device;
+
+        device = kzalloc(sizeof(struct rndis_device), GFP_KERNEL);
+        if (!device)
+                return NULL;
+
+        spin_lock_init(&device->request_lock);
+
+        INIT_LIST_HEAD(&device->req_list);
+
+        device->state = RNDIS_DEV_UNINITIALIZED;
+
+        return device;
+}
+
+static struct rndis_request *get_rndis_request(struct rndis_device *dev,
+                                             u32 msg_type,
+                                             u32 msg_len)
+{
+        struct rndis_request *request;
+        struct rndis_message *rndis_msg;
+        struct rndis_set_request *set;
+        unsigned long flags;
+
+        request = kzalloc(sizeof(struct rndis_request), GFP_KERNEL);
+        if (!request)
+                return NULL;
+
+        init_completion(&request->wait_event);
+
+        rndis_msg = &request->request_msg;
+        rndis_msg->ndis_msg_type = msg_type;
+        rndis_msg->msg_len = msg_len;
+
+        /*
+         * Set the request id. This field is always after the rndis header for
+         * request/response packet types so we just used the SetRequest as a
+         * template
+         */
+        set = &rndis_msg->msg.set_req;
+        set->req_id = atomic_inc_return(&dev->new_req_id);
+
+        /* Add to the request list */
+        spin_lock_irqsave(&dev->request_lock, flags);
+        list_add_tail(&request->list_ent, &dev->req_list);
+        spin_unlock_irqrestore(&dev->request_lock, flags);
+
+        return request;
+}
+
+static void put_rndis_request(struct rndis_device *dev,
+                            struct rndis_request *req)
+{
+        unsigned long flags;
+
+        spin_lock_irqsave(&dev->request_lock, flags);
+        list_del(&req->list_ent);
+        spin_unlock_irqrestore(&dev->request_lock, flags);
+
+        kfree(req);
+}
+
+static void dump_rndis_message(struct hv_device *hv_dev,
+                        struct rndis_message *rndis_msg)
+{
+        struct net_device *netdev;
+        struct netvsc_device *net_device;
+
+        net_device = hv_get_drvdata(hv_dev);
+        netdev = net_device->ndev;
+
+        switch (rndis_msg->ndis_msg_type) {
+        case REMOTE_NDIS_PACKET_MSG:
+                netdev_dbg(netdev, "REMOTE_NDIS_PACKET_MSG (len %u, "
+                           "data offset %u data len %u, # oob %u, "
+                           "oob offset %u, oob len %u, pkt offset %u, "
+                           "pkt len %u\n",
+                           rndis_msg->msg_len,
+                           rndis_msg->msg.pkt.data_offset,
+                           rndis_msg->msg.pkt.data_len,
+                           rndis_msg->msg.pkt.num_oob_data_elements,
+                           rndis_msg->msg.pkt.oob_data_offset,
+                           rndis_msg->msg.pkt.oob_data_len,
+                           rndis_msg->msg.pkt.per_pkt_info_offset,
+                           rndis_msg->msg.pkt.per_pkt_info_len);
+                break;
+
+        case REMOTE_NDIS_INITIALIZE_CMPLT:
+                netdev_dbg(netdev, "REMOTE_NDIS_INITIALIZE_CMPLT "
+                        "(len %u, id 0x%x, status 0x%x, major %d, minor %d, "
+                        "device flags %d, max xfer size 0x%x, max pkts %u, "
+                        "pkt aligned %u)\n",
+                        rndis_msg->msg_len,
+                        rndis_msg->msg.init_complete.req_id,
+                        rndis_msg->msg.init_complete.status,
+                        rndis_msg->msg.init_complete.major_ver,
+                        rndis_msg->msg.init_complete.minor_ver,
+                        rndis_msg->msg.init_complete.dev_flags,
+                        rndis_msg->msg.init_complete.max_xfer_size,
+                        rndis_msg->msg.init_complete.
+                           max_pkt_per_msg,
+                        rndis_msg->msg.init_complete.
+                           pkt_alignment_factor);
+                break;
+
+        case REMOTE_NDIS_QUERY_CMPLT:
+                netdev_dbg(netdev, "REMOTE_NDIS_QUERY_CMPLT "
+                        "(len %u, id 0x%x, status 0x%x, buf len %u, "
+                        "buf offset %u)\n",
+                        rndis_msg->msg_len,
+                        rndis_msg->msg.query_complete.req_id,
+                        rndis_msg->msg.query_complete.status,
+                        rndis_msg->msg.query_complete.
+                           info_buflen,
+                        rndis_msg->msg.query_complete.
+                           info_buf_offset);
+                break;
+
+        case REMOTE_NDIS_SET_CMPLT:
+                netdev_dbg(netdev,
+                        "REMOTE_NDIS_SET_CMPLT (len %u, id 0x%x, status 0x%x)\n",
+                        rndis_msg->msg_len,
+                        rndis_msg->msg.set_complete.req_id,
+                        rndis_msg->msg.set_complete.status);
+                break;
+
+        case REMOTE_NDIS_INDICATE_STATUS_MSG:
+                netdev_dbg(netdev, "REMOTE_NDIS_INDICATE_STATUS_MSG "
+                        "(len %u, status 0x%x, buf len %u, buf offset %u)\n",
+                        rndis_msg->msg_len,
+                        rndis_msg->msg.indicate_status.status,
+                        rndis_msg->msg.indicate_status.status_buflen,
+                        rndis_msg->msg.indicate_status.status_buf_offset);
+                break;
+
+        default:
+                netdev_dbg(netdev, "0x%x (len %u)\n",
+                        rndis_msg->ndis_msg_type,
+                        rndis_msg->msg_len);
+                break;
+        }
+}
+
+static int rndis_filter_send_request(struct rndis_device *dev,
+                                  struct rndis_request *req)
+{
+        int ret;
+        struct hv_netvsc_packet *packet;
+
+        /* Setup the packet to send it */
+        packet = &req->pkt;
+
+        packet->is_data_pkt = false;
+        packet->total_data_buflen = req->request_msg.msg_len;
+        packet->page_buf_cnt = 1;
+
+        packet->page_buf[0].pfn = virt_to_phys(&req->request_msg) >>
+                                        PAGE_SHIFT;
+        packet->page_buf[0].len = req->request_msg.msg_len;
+        packet->page_buf[0].offset =
+                (unsigned long)&req->request_msg & (PAGE_SIZE - 1);
+
+        packet->completion.send.send_completion_ctx = req;/* packet; */
+        packet->completion.send.send_completion =
+                rndis_filter_send_request_completion;
+        packet->completion.send.send_completion_tid = (unsigned long)dev;
+
+        ret = netvsc_send(dev->net_dev->dev, packet);
+        return ret;
+}
+
+static void rndis_filter_receive_response(struct rndis_device *dev,
+                                       struct rndis_message *resp)
+{
+        struct rndis_request *request = NULL;
+        bool found = false;
+        unsigned long flags;
+        struct net_device *ndev;
+
+        ndev = dev->net_dev->ndev;
+
+        spin_lock_irqsave(&dev->request_lock, flags);
+        list_for_each_entry(request, &dev->req_list, list_ent) {
+                /*
+                 * All request/response message contains RequestId as the 1st
+                 * field
+                 */
+                if (request->request_msg.msg.init_req.req_id
+                    == resp->msg.init_complete.req_id) {
+                        found = true;
+                        break;
+                }
+        }
+        spin_unlock_irqrestore(&dev->request_lock, flags);
+
+        if (found) {
+                if (resp->msg_len <= sizeof(struct rndis_message)) {
+                        memcpy(&request->response_msg, resp,
+                               resp->msg_len);
+                } else {
+                        netdev_err(ndev,
+                                "rndis response buffer overflow "
+                                "detected (size %u max %zu)\n",
+                                resp->msg_len,
+                                sizeof(struct rndis_filter_packet));
+
+                        if (resp->ndis_msg_type ==
+                            REMOTE_NDIS_RESET_CMPLT) {
+                                /* does not have a request id field */
+                                request->response_msg.msg.reset_complete.
+                                        status = STATUS_BUFFER_OVERFLOW;
+                        } else {
+                                request->response_msg.msg.
+                                init_complete.status =
+                                        STATUS_BUFFER_OVERFLOW;
+                        }
+                }
+
+                complete(&request->wait_event);
+        } else {
+                netdev_err(ndev,
+                        "no rndis request found for this response "
+                        "(id 0x%x res type 0x%x)\n",
+                        resp->msg.init_complete.req_id,
+                        resp->ndis_msg_type);
+        }
+}
+
+static void rndis_filter_receive_indicate_status(struct rndis_device *dev,
+                                             struct rndis_message *resp)
+{
+        struct rndis_indicate_status *indicate =
+                        &resp->msg.indicate_status;
+
+        if (indicate->status == RNDIS_STATUS_MEDIA_CONNECT) {
+                netvsc_linkstatus_callback(
+                        dev->net_dev->dev, 1);
+        } else if (indicate->status == RNDIS_STATUS_MEDIA_DISCONNECT) {
+                netvsc_linkstatus_callback(
+                        dev->net_dev->dev, 0);
+        } else {
+                /*
+                 * TODO:
+                 */
+        }
+}
+
+static void rndis_filter_receive_data(struct rndis_device *dev,
+                                   struct rndis_message *msg,
+                                   struct hv_netvsc_packet *pkt)
+{
+        struct rndis_packet *rndis_pkt;
+        u32 data_offset;
+        int i;
+
+        rndis_pkt = &msg->msg.pkt;
+
+        /*
+         * FIXME: Handle multiple rndis pkt msgs that maybe enclosed in this
+         * netvsc packet (ie TotalDataBufferLength != MessageLength)
+         */
+
+        /* Remove the rndis header and pass it back up the stack */
+        data_offset = RNDIS_HEADER_SIZE + rndis_pkt->data_offset;
+
+        pkt->total_data_buflen -= data_offset;
+        pkt->page_buf[0].offset += data_offset;
+        pkt->page_buf[0].len -= data_offset;
+
+        /* Drop the 0th page, if rndis data go beyond page boundary */
+        if (pkt->page_buf[0].offset >= PAGE_SIZE) {
+                pkt->page_buf[1].offset = pkt->page_buf[0].offset - PAGE_SIZE;
+                pkt->page_buf[1].len -= pkt->page_buf[1].offset;
+                pkt->page_buf_cnt--;
+                for (i = 0; i < pkt->page_buf_cnt; i++)
+                        pkt->page_buf[i] = pkt->page_buf[i+1];
+        }
+
+        pkt->is_data_pkt = true;
+
+        netvsc_recv_callback(dev->net_dev->dev, pkt);
+}
+
+int rndis_filter_receive(struct hv_device *dev,
+                                struct hv_netvsc_packet *pkt)
+{
+        struct netvsc_device *net_dev = hv_get_drvdata(dev);
+        struct rndis_device *rndis_dev;
+        struct rndis_message rndis_msg;
+        struct rndis_message *rndis_hdr;
+        struct net_device *ndev;
+
+        if (!net_dev)
+                return -EINVAL;
+
+        ndev = net_dev->ndev;
+
+        /* Make sure the rndis device state is initialized */
+        if (!net_dev->extension) {
+                netdev_err(ndev, "got rndis message but no rndis device - "
+                          "dropping this message!\n");
+                return -ENODEV;
+        }
+
+        rndis_dev = (struct rndis_device *)net_dev->extension;
+        if (rndis_dev->state == RNDIS_DEV_UNINITIALIZED) {
+                netdev_err(ndev, "got rndis message but rndis device "
+                           "uninitialized...dropping this message!\n");
+                return -ENODEV;
+        }
+
+        rndis_hdr = (struct rndis_message *)kmap_atomic(
+                        pfn_to_page(pkt->page_buf[0].pfn), KM_IRQ0);
+
+        rndis_hdr = (void *)((unsigned long)rndis_hdr +
+                        pkt->page_buf[0].offset);
+
+        /* Make sure we got a valid rndis message */
+        if ((rndis_hdr->ndis_msg_type != REMOTE_NDIS_PACKET_MSG) &&
+            (rndis_hdr->msg_len > sizeof(struct rndis_message))) {
+                netdev_err(ndev, "incoming rndis message buffer overflow "
+                           "detected (got %u, max %zu)..marking it an error!\n",
+                           rndis_hdr->msg_len,
+                           sizeof(struct rndis_message));
+        }
+
+        memcpy(&rndis_msg, rndis_hdr,
+                (rndis_hdr->msg_len > sizeof(struct rndis_message)) ?
+                        sizeof(struct rndis_message) :
+                        rndis_hdr->msg_len);
+
+        kunmap_atomic(rndis_hdr - pkt->page_buf[0].offset, KM_IRQ0);
+
+        dump_rndis_message(dev, &rndis_msg);
+
+        switch (rndis_msg.ndis_msg_type) {
+        case REMOTE_NDIS_PACKET_MSG:
+                /* data msg */
+                rndis_filter_receive_data(rndis_dev, &rndis_msg, pkt);
+                break;
+
+        case REMOTE_NDIS_INITIALIZE_CMPLT:
+        case REMOTE_NDIS_QUERY_CMPLT:
+        case REMOTE_NDIS_SET_CMPLT:
+                /* completion msgs */
+                rndis_filter_receive_response(rndis_dev, &rndis_msg);
+                break;
+
+        case REMOTE_NDIS_INDICATE_STATUS_MSG:
+                /* notification msgs */
+                rndis_filter_receive_indicate_status(rndis_dev, &rndis_msg);
+                break;
+        default:
+                netdev_err(ndev,
+                        "unhandled rndis message (type %u len %u)\n",
+                           rndis_msg.ndis_msg_type,
+                           rndis_msg.msg_len);
+                break;
+        }
+
+        return 0;
+}
+
+static int rndis_filter_query_device(struct rndis_device *dev, u32 oid,
+                                  void *result, u32 *result_size)
+{
+        struct rndis_request *request;
+        u32 inresult_size = *result_size;
+        struct rndis_query_request *query;
+        struct rndis_query_complete *query_complete;
+        int ret = 0;
+        int t;
+
+        if (!result)
+                return -EINVAL;
+
+        *result_size = 0;
+        request = get_rndis_request(dev, REMOTE_NDIS_QUERY_MSG,
+                        RNDIS_MESSAGE_SIZE(struct rndis_query_request));
+        if (!request) {
+                ret = -ENOMEM;
+                goto cleanup;
+        }
+
+        /* Setup the rndis query */
+        query = &request->request_msg.msg.query_req;
+        query->oid = oid;
+        query->info_buf_offset = sizeof(struct rndis_query_request);
+        query->info_buflen = 0;
+        query->dev_vc_handle = 0;
+
+        ret = rndis_filter_send_request(dev, request);
+        if (ret != 0)
+                goto cleanup;
+
+        t = wait_for_completion_timeout(&request->wait_event, 5*HZ);
+        if (t == 0) {
+                ret = -ETIMEDOUT;
+                goto cleanup;
+        }
+
+        /* Copy the response back */
+        query_complete = &request->response_msg.msg.query_complete;
+
+        if (query_complete->info_buflen > inresult_size) {
+                ret = -1;
+                goto cleanup;
+        }
+
+        memcpy(result,
+               (void *)((unsigned long)query_complete +
+                         query_complete->info_buf_offset),
+               query_complete->info_buflen);
+
+        *result_size = query_complete->info_buflen;
+
+cleanup:
+        if (request)
+                put_rndis_request(dev, request);
+
+        return ret;
+}
+
+static int rndis_filter_query_device_mac(struct rndis_device *dev)
+{
+        u32 size = ETH_ALEN;
+
+        return rndis_filter_query_device(dev,
+                                      RNDIS_OID_802_3_PERMANENT_ADDRESS,
+                                      dev->hw_mac_adr, &size);
+}
+
+static int rndis_filter_query_device_link_status(struct rndis_device *dev)
+{
+        u32 size = sizeof(u32);
+        u32 link_status;
+        int ret;
+
+        ret = rndis_filter_query_device(dev,
+                                      RNDIS_OID_GEN_MEDIA_CONNECT_STATUS,
+                                      &link_status, &size);
+        dev->link_state = (link_status != 0) ? true : false;
+
+        return ret;
+}
+
+static int rndis_filter_set_packet_filter(struct rndis_device *dev,
+                                      u32 new_filter)
+{
+        struct rndis_request *request;
+        struct rndis_set_request *set;
+        struct rndis_set_complete *set_complete;
+        u32 status;
+        int ret, t;
+        struct net_device *ndev;
+
+        ndev = dev->net_dev->ndev;
+
+        request = get_rndis_request(dev, REMOTE_NDIS_SET_MSG,
+                        RNDIS_MESSAGE_SIZE(struct rndis_set_request) +
+                        sizeof(u32));
+        if (!request) {
+                ret = -ENOMEM;
+                goto cleanup;
+        }
+
+        /* Setup the rndis set */
+        set = &request->request_msg.msg.set_req;
+        set->oid = RNDIS_OID_GEN_CURRENT_PACKET_FILTER;
+        set->info_buflen = sizeof(u32);
+        set->info_buf_offset = sizeof(struct rndis_set_request);
+
+        memcpy((void *)(unsigned long)set + sizeof(struct rndis_set_request),
+               &new_filter, sizeof(u32));
+
+        ret = rndis_filter_send_request(dev, request);
+        if (ret != 0)
+                goto cleanup;
+
+        t = wait_for_completion_timeout(&request->wait_event, 5*HZ);
+
+        if (t == 0) {
+                netdev_err(ndev,
+                        "timeout before we got a set response...\n");
+                /*
+                 * We can't deallocate the request since we may still receive a
+                 * send completion for it.
+                 */
+                goto exit;
+        } else {
+                set_complete = &request->response_msg.msg.set_complete;
+                status = set_complete->status;
+        }
+
+cleanup:
+        if (request)
+                put_rndis_request(dev, request);
+exit:
+        return ret;
+}
+
+
+static int rndis_filter_init_device(struct rndis_device *dev)
+{
+        struct rndis_request *request;
+        struct rndis_initialize_request *init;
+        struct rndis_initialize_complete *init_complete;
+        u32 status;
+        int ret, t;
+
+        request = get_rndis_request(dev, REMOTE_NDIS_INITIALIZE_MSG,
+                        RNDIS_MESSAGE_SIZE(struct rndis_initialize_request));
+        if (!request) {
+                ret = -ENOMEM;
+                goto cleanup;
+        }
+
+        /* Setup the rndis set */
+        init = &request->request_msg.msg.init_req;
+        init->major_ver = RNDIS_MAJOR_VERSION;
+        init->minor_ver = RNDIS_MINOR_VERSION;
+        /* FIXME: Use 1536 - rounded ethernet frame size */
+        init->max_xfer_size = 2048;
+
+        dev->state = RNDIS_DEV_INITIALIZING;
+
+        ret = rndis_filter_send_request(dev, request);
+        if (ret != 0) {
+                dev->state = RNDIS_DEV_UNINITIALIZED;
+                goto cleanup;
+        }
+
+
+        t = wait_for_completion_timeout(&request->wait_event, 5*HZ);
+
+        if (t == 0) {
+                ret = -ETIMEDOUT;
+                goto cleanup;
+        }
+
+        init_complete = &request->response_msg.msg.init_complete;
+        status = init_complete->status;
+        if (status == RNDIS_STATUS_SUCCESS) {
+                dev->state = RNDIS_DEV_INITIALIZED;
+                ret = 0;
+        } else {
+                dev->state = RNDIS_DEV_UNINITIALIZED;
+                ret = -EINVAL;
+        }
+
+cleanup:
+        if (request)
+                put_rndis_request(dev, request);
+
+        return ret;
+}
+
+static void rndis_filter_halt_device(struct rndis_device *dev)
+{
+        struct rndis_request *request;
+        struct rndis_halt_request *halt;
+
+        /* Attempt to do a rndis device halt */
+        request = get_rndis_request(dev, REMOTE_NDIS_HALT_MSG,
+                                RNDIS_MESSAGE_SIZE(struct rndis_halt_request));
+        if (!request)
+                goto cleanup;
+
+        /* Setup the rndis set */
+        halt = &request->request_msg.msg.halt_req;
+        halt->req_id = atomic_inc_return(&dev->new_req_id);
+
+        /* Ignore return since this msg is optional. */
+        rndis_filter_send_request(dev, request);
+
+        dev->state = RNDIS_DEV_UNINITIALIZED;
+
+cleanup:
+        if (request)
+                put_rndis_request(dev, request);
+        return;
+}
+
+static int rndis_filter_open_device(struct rndis_device *dev)
+{
+        int ret;
+
+        if (dev->state != RNDIS_DEV_INITIALIZED)
+                return 0;
+
+        ret = rndis_filter_set_packet_filter(dev,
+                                         NDIS_PACKET_TYPE_BROADCAST |
+                                         NDIS_PACKET_TYPE_ALL_MULTICAST |
+                                         NDIS_PACKET_TYPE_DIRECTED);
+        if (ret == 0)
+                dev->state = RNDIS_DEV_DATAINITIALIZED;
+
+        return ret;
+}
+
+static int rndis_filter_close_device(struct rndis_device *dev)
+{
+        int ret;
+
+        if (dev->state != RNDIS_DEV_DATAINITIALIZED)
+                return 0;
+
+        ret = rndis_filter_set_packet_filter(dev, 0);
+        if (ret == 0)
+                dev->state = RNDIS_DEV_INITIALIZED;
+
+        return ret;
+}
+
+int rndis_filter_device_add(struct hv_device *dev,
+                                  void *additional_info)
+{
+        int ret;
+        struct netvsc_device *net_device;
+        struct rndis_device *rndis_device;
+        struct netvsc_device_info *device_info = additional_info;
+
+        rndis_device = get_rndis_device();
+        if (!rndis_device)
+                return -ENODEV;
+
+        /*
+         * Let the inner driver handle this first to create the netvsc channel
+         * NOTE! Once the channel is created, we may get a receive callback
+         * (RndisFilterOnReceive()) before this call is completed
+         */
+        ret = netvsc_device_add(dev, additional_info);
+        if (ret != 0) {
+                kfree(rndis_device);
+                return ret;
+        }
+
+
+        /* Initialize the rndis device */
+        net_device = hv_get_drvdata(dev);
+
+        net_device->extension = rndis_device;
+        rndis_device->net_dev = net_device;
+
+        /* Send the rndis initialization message */
+        ret = rndis_filter_init_device(rndis_device);
+        if (ret != 0) {
+                /*
+                 * TODO: If rndis init failed, we will need to shut down the
+                 * channel
+                 */
+        }
+
+        /* Get the mac address */
+        ret = rndis_filter_query_device_mac(rndis_device);
+        if (ret != 0) {
+                /*
+                 * TODO: shutdown rndis device and the channel
+                 */
+        }
+
+        memcpy(device_info->mac_adr, rndis_device->hw_mac_adr, ETH_ALEN);
+
+        rndis_filter_query_device_link_status(rndis_device);
+
+        device_info->link_state = rndis_device->link_state;
+
+        dev_info(&dev->device, "Device MAC %pM link state %s\n",
+                 rndis_device->hw_mac_adr,
+                 device_info->link_state ? "down" : "up");
+
+        return ret;
+}
+
+void rndis_filter_device_remove(struct hv_device *dev)
+{
+        struct netvsc_device *net_dev = hv_get_drvdata(dev);
+        struct rndis_device *rndis_dev = net_dev->extension;
+
+        /* Halt and release the rndis device */
+        rndis_filter_halt_device(rndis_dev);
+
+        kfree(rndis_dev);
+        net_dev->extension = NULL;
+
+        netvsc_device_remove(dev);
+}
+
+
+int rndis_filter_open(struct hv_device *dev)
+{
+        struct netvsc_device *net_device = hv_get_drvdata(dev);
+
+        if (!net_device)
+                return -EINVAL;
+
+        return rndis_filter_open_device(net_device->extension);
+}
+
+int rndis_filter_close(struct hv_device *dev)
+{
+        struct netvsc_device *netDevice = hv_get_drvdata(dev);
+
+        if (!netDevice)
+                return -EINVAL;
+
+        return rndis_filter_close_device(netDevice->extension);
+}
+
+int rndis_filter_send(struct hv_device *dev,
+                             struct hv_netvsc_packet *pkt)
+{
+        int ret;
+        struct rndis_filter_packet *filterPacket;
+        struct rndis_message *rndisMessage;
+        struct rndis_packet *rndisPacket;
+        u32 rndisMessageSize;
+
+        /* Add the rndis header */
+        filterPacket = (struct rndis_filter_packet *)pkt->extension;
+
+        memset(filterPacket, 0, sizeof(struct rndis_filter_packet));
+
+        rndisMessage = &filterPacket->msg;
+        rndisMessageSize = RNDIS_MESSAGE_SIZE(struct rndis_packet);
+
+        rndisMessage->ndis_msg_type = REMOTE_NDIS_PACKET_MSG;
+        rndisMessage->msg_len = pkt->total_data_buflen +
+                                      rndisMessageSize;
+
+        rndisPacket = &rndisMessage->msg.pkt;
+        rndisPacket->data_offset = sizeof(struct rndis_packet);
+        rndisPacket->data_len = pkt->total_data_buflen;
+
+        pkt->is_data_pkt = true;
+        pkt->page_buf[0].pfn = virt_to_phys(rndisMessage) >> PAGE_SHIFT;
+        pkt->page_buf[0].offset =
+                        (unsigned long)rndisMessage & (PAGE_SIZE-1);
+        pkt->page_buf[0].len = rndisMessageSize;
+
+        /* Save the packet send completion and context */
+        filterPacket->completion = pkt->completion.send.send_completion;
+        filterPacket->completion_ctx =
+                                pkt->completion.send.send_completion_ctx;
+
+        /* Use ours */
+        pkt->completion.send.send_completion = rndis_filter_send_completion;
+        pkt->completion.send.send_completion_ctx = filterPacket;
+
+        ret = netvsc_send(dev, pkt);
+        if (ret != 0) {
+                /*
+                 * Reset the completion to originals to allow retries from
+                 * above
+                 */
+                pkt->completion.send.send_completion =
+                                filterPacket->completion;
+                pkt->completion.send.send_completion_ctx =
+                                filterPacket->completion_ctx;
+        }
+
+        return ret;
+}
+
+static void rndis_filter_send_completion(void *ctx)
+{
+        struct rndis_filter_packet *filterPacket = ctx;
+
+        /* Pass it back to the original handler */
+        filterPacket->completion(filterPacket->completion_ctx);
+}
+
+
+static void rndis_filter_send_request_completion(void *ctx)
+{
+        /* Noop */
+}