d1af1db7d6
Signed-off-by: Bill Pemberton <wfp5p@virginia.edu> Cc: Hank Janssen <hjanssen@microsoft.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
1520 lines
39 KiB
C
1520 lines
39 KiB
C
/*
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*
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* Copyright (c) 2009, Microsoft Corporation.
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms and conditions of the GNU General Public License,
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* version 2, as published by the Free Software Foundation.
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*
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* This program is distributed in the hope it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
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* more details.
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*
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* You should have received a copy of the GNU General Public License along with
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* this program; if not, write to the Free Software Foundation, Inc., 59 Temple
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* Place - Suite 330, Boston, MA 02111-1307 USA.
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*
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* Authors:
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* Hank Janssen <hjanssen@microsoft.com>
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*
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*/
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#include <linux/kernel.h>
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#include <linux/mm.h>
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#include <linux/delay.h>
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#include "include/logging.h"
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#include "NetVsc.h"
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#include "RndisFilter.h"
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/* Globals */
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static const char* gDriverName="netvsc";
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/* {F8615163-DF3E-46c5-913F-F2D2F965ED0E} */
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static const GUID gNetVscDeviceType={
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.Data = {0x63, 0x51, 0x61, 0xF8, 0x3E, 0xDF, 0xc5, 0x46, 0x91, 0x3F, 0xF2, 0xD2, 0xF9, 0x65, 0xED, 0x0E}
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};
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/* Internal routines */
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static int
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NetVscOnDeviceAdd(
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DEVICE_OBJECT *Device,
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void *AdditionalInfo
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);
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static int
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NetVscOnDeviceRemove(
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DEVICE_OBJECT *Device
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);
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static void
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NetVscOnCleanup(
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DRIVER_OBJECT *Driver
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);
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static void
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NetVscOnChannelCallback(
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void * context
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);
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static int
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NetVscInitializeSendBufferWithNetVsp(
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DEVICE_OBJECT *Device
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);
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static int
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NetVscInitializeReceiveBufferWithNetVsp(
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DEVICE_OBJECT *Device
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);
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static int
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NetVscDestroySendBuffer(
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struct NETVSC_DEVICE *NetDevice
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);
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static int
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NetVscDestroyReceiveBuffer(
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struct NETVSC_DEVICE *NetDevice
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);
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static int
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NetVscConnectToVsp(
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DEVICE_OBJECT *Device
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);
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static void
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NetVscOnSendCompletion(
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DEVICE_OBJECT *Device,
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VMPACKET_DESCRIPTOR *Packet
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);
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static int
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NetVscOnSend(
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DEVICE_OBJECT *Device,
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NETVSC_PACKET *Packet
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);
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static void
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NetVscOnReceive(
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DEVICE_OBJECT *Device,
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VMPACKET_DESCRIPTOR *Packet
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);
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static void
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NetVscOnReceiveCompletion(
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void * Context
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);
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static void
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NetVscSendReceiveCompletion(
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DEVICE_OBJECT *Device,
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u64 TransactionId
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);
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static inline struct NETVSC_DEVICE *AllocNetDevice(DEVICE_OBJECT *Device)
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{
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struct NETVSC_DEVICE *netDevice;
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netDevice = kzalloc(sizeof(struct NETVSC_DEVICE), GFP_KERNEL);
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if (!netDevice)
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return NULL;
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/* Set to 2 to allow both inbound and outbound traffic */
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InterlockedCompareExchange(&netDevice->RefCount, 2, 0);
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netDevice->Device = Device;
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Device->Extension = netDevice;
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return netDevice;
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}
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static inline void FreeNetDevice(struct NETVSC_DEVICE *Device)
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{
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ASSERT(Device->RefCount == 0);
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Device->Device->Extension = NULL;
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kfree(Device);
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}
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/* Get the net device object iff exists and its refcount > 1 */
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static inline struct NETVSC_DEVICE *GetOutboundNetDevice(DEVICE_OBJECT *Device)
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{
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struct NETVSC_DEVICE *netDevice;
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netDevice = (struct NETVSC_DEVICE*)Device->Extension;
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if (netDevice && netDevice->RefCount > 1)
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{
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InterlockedIncrement(&netDevice->RefCount);
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}
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else
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{
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netDevice = NULL;
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}
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return netDevice;
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}
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/* Get the net device object iff exists and its refcount > 0 */
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static inline struct NETVSC_DEVICE *GetInboundNetDevice(DEVICE_OBJECT *Device)
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{
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struct NETVSC_DEVICE *netDevice;
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netDevice = (struct NETVSC_DEVICE*)Device->Extension;
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if (netDevice && netDevice->RefCount)
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{
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InterlockedIncrement(&netDevice->RefCount);
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}
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else
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{
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netDevice = NULL;
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}
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return netDevice;
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}
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static inline void PutNetDevice(DEVICE_OBJECT *Device)
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{
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struct NETVSC_DEVICE *netDevice;
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netDevice = (struct NETVSC_DEVICE*)Device->Extension;
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ASSERT(netDevice);
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InterlockedDecrement(&netDevice->RefCount);
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}
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static inline struct NETVSC_DEVICE *ReleaseOutboundNetDevice(DEVICE_OBJECT *Device)
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{
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struct NETVSC_DEVICE *netDevice;
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netDevice = (struct NETVSC_DEVICE*)Device->Extension;
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if (netDevice == NULL)
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return NULL;
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/* Busy wait until the ref drop to 2, then set it to 1 */
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while (InterlockedCompareExchange(&netDevice->RefCount, 1, 2) != 2)
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{
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udelay(100);
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}
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return netDevice;
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}
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static inline struct NETVSC_DEVICE *ReleaseInboundNetDevice(DEVICE_OBJECT *Device)
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{
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struct NETVSC_DEVICE *netDevice;
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netDevice = (struct NETVSC_DEVICE*)Device->Extension;
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if (netDevice == NULL)
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return NULL;
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/* Busy wait until the ref drop to 1, then set it to 0 */
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while (InterlockedCompareExchange(&netDevice->RefCount, 0, 1) != 1)
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{
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udelay(100);
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}
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Device->Extension = NULL;
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return netDevice;
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}
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/*++;
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Name:
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NetVscInitialize()
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Description:
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Main entry point
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--*/
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int
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NetVscInitialize(
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DRIVER_OBJECT *drv
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)
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{
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NETVSC_DRIVER_OBJECT* driver = (NETVSC_DRIVER_OBJECT*)drv;
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int ret=0;
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DPRINT_ENTER(NETVSC);
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DPRINT_DBG(NETVSC, "sizeof(NETVSC_PACKET)=%ld, sizeof(NVSP_MESSAGE)=%ld, sizeof(VMTRANSFER_PAGE_PACKET_HEADER)=%ld",
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sizeof(NETVSC_PACKET), sizeof(NVSP_MESSAGE), sizeof(VMTRANSFER_PAGE_PACKET_HEADER));
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/* Make sure we are at least 2 pages since 1 page is used for control */
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ASSERT(driver->RingBufferSize >= (PAGE_SIZE << 1));
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drv->name = gDriverName;
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memcpy(&drv->deviceType, &gNetVscDeviceType, sizeof(GUID));
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/* Make sure it is set by the caller */
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ASSERT(driver->OnReceiveCallback);
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ASSERT(driver->OnLinkStatusChanged);
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/* Setup the dispatch table */
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driver->Base.OnDeviceAdd = NetVscOnDeviceAdd;
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driver->Base.OnDeviceRemove = NetVscOnDeviceRemove;
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driver->Base.OnCleanup = NetVscOnCleanup;
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driver->OnSend = NetVscOnSend;
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RndisFilterInit(driver);
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DPRINT_EXIT(NETVSC);
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return ret;
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}
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static int
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NetVscInitializeReceiveBufferWithNetVsp(
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DEVICE_OBJECT *Device
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)
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{
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int ret=0;
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struct NETVSC_DEVICE *netDevice;
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NVSP_MESSAGE *initPacket;
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DPRINT_ENTER(NETVSC);
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netDevice = GetOutboundNetDevice(Device);
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if (!netDevice)
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{
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DPRINT_ERR(NETVSC, "unable to get net device...device being destroyed?");
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DPRINT_EXIT(NETVSC);
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return -1;
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}
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ASSERT(netDevice->ReceiveBufferSize > 0);
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ASSERT((netDevice->ReceiveBufferSize & (PAGE_SIZE-1)) == 0); /* page-size grandularity */
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netDevice->ReceiveBuffer = PageAlloc(netDevice->ReceiveBufferSize >> PAGE_SHIFT);
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if (!netDevice->ReceiveBuffer)
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{
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DPRINT_ERR(NETVSC, "unable to allocate receive buffer of size %d", netDevice->ReceiveBufferSize);
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ret = -1;
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goto Cleanup;
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}
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ASSERT(((unsigned long)netDevice->ReceiveBuffer & (PAGE_SIZE-1)) == 0); /* page-aligned buffer */
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DPRINT_INFO(NETVSC, "Establishing receive buffer's GPADL...");
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/*
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* Establish the gpadl handle for this buffer on this
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* channel. Note: This call uses the vmbus connection rather
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* than the channel to establish the gpadl handle.
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*/
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ret = Device->Driver->VmbusChannelInterface.EstablishGpadl(Device,
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netDevice->ReceiveBuffer,
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netDevice->ReceiveBufferSize,
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&netDevice->ReceiveBufferGpadlHandle);
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if (ret != 0)
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{
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DPRINT_ERR(NETVSC, "unable to establish receive buffer's gpadl");
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goto Cleanup;
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}
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/* WaitEventWait(ext->ChannelInitEvent); */
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/* Notify the NetVsp of the gpadl handle */
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DPRINT_INFO(NETVSC, "Sending NvspMessage1TypeSendReceiveBuffer...");
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initPacket = &netDevice->ChannelInitPacket;
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memset(initPacket, 0, sizeof(NVSP_MESSAGE));
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initPacket->Header.MessageType = NvspMessage1TypeSendReceiveBuffer;
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initPacket->Messages.Version1Messages.SendReceiveBuffer.GpadlHandle = netDevice->ReceiveBufferGpadlHandle;
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initPacket->Messages.Version1Messages.SendReceiveBuffer.Id = NETVSC_RECEIVE_BUFFER_ID;
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/* Send the gpadl notification request */
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ret = Device->Driver->VmbusChannelInterface.SendPacket(Device,
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initPacket,
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sizeof(NVSP_MESSAGE),
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(unsigned long)initPacket,
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VmbusPacketTypeDataInBand,
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VMBUS_DATA_PACKET_FLAG_COMPLETION_REQUESTED);
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if (ret != 0)
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{
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DPRINT_ERR(NETVSC, "unable to send receive buffer's gpadl to netvsp");
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goto Cleanup;
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}
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WaitEventWait(netDevice->ChannelInitEvent);
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/* Check the response */
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if (initPacket->Messages.Version1Messages.SendReceiveBufferComplete.Status != NvspStatusSuccess)
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{
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DPRINT_ERR(NETVSC,
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"Unable to complete receive buffer initialzation with NetVsp - status %d",
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initPacket->Messages.Version1Messages.SendReceiveBufferComplete.Status);
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ret = -1;
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goto Cleanup;
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}
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/* Parse the response */
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ASSERT(netDevice->ReceiveSectionCount == 0);
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ASSERT(netDevice->ReceiveSections == NULL);
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netDevice->ReceiveSectionCount = initPacket->Messages.Version1Messages.SendReceiveBufferComplete.NumSections;
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netDevice->ReceiveSections = kmalloc(netDevice->ReceiveSectionCount * sizeof(NVSP_1_RECEIVE_BUFFER_SECTION), GFP_KERNEL);
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if (netDevice->ReceiveSections == NULL)
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{
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ret = -1;
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goto Cleanup;
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}
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memcpy(netDevice->ReceiveSections,
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initPacket->Messages.Version1Messages.SendReceiveBufferComplete.Sections,
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netDevice->ReceiveSectionCount * sizeof(NVSP_1_RECEIVE_BUFFER_SECTION));
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DPRINT_INFO(NETVSC,
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"Receive sections info (count %d, offset %d, endoffset %d, suballoc size %d, num suballocs %d)",
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netDevice->ReceiveSectionCount, netDevice->ReceiveSections[0].Offset, netDevice->ReceiveSections[0].EndOffset,
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netDevice->ReceiveSections[0].SubAllocationSize, netDevice->ReceiveSections[0].NumSubAllocations);
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|
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/* For 1st release, there should only be 1 section that represents the entire receive buffer */
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if (netDevice->ReceiveSectionCount != 1 ||
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netDevice->ReceiveSections->Offset != 0 )
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{
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ret = -1;
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goto Cleanup;
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}
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goto Exit;
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Cleanup:
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NetVscDestroyReceiveBuffer(netDevice);
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Exit:
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PutNetDevice(Device);
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DPRINT_EXIT(NETVSC);
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return ret;
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}
|
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|
|
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static int
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NetVscInitializeSendBufferWithNetVsp(
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DEVICE_OBJECT *Device
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)
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{
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int ret=0;
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struct NETVSC_DEVICE *netDevice;
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NVSP_MESSAGE *initPacket;
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DPRINT_ENTER(NETVSC);
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netDevice = GetOutboundNetDevice(Device);
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if (!netDevice)
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{
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DPRINT_ERR(NETVSC, "unable to get net device...device being destroyed?");
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DPRINT_EXIT(NETVSC);
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return -1;
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}
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ASSERT(netDevice->SendBufferSize > 0);
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ASSERT((netDevice->SendBufferSize & (PAGE_SIZE-1)) == 0); /* page-size grandularity */
|
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netDevice->SendBuffer = PageAlloc(netDevice->SendBufferSize >> PAGE_SHIFT);
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if (!netDevice->SendBuffer)
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{
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DPRINT_ERR(NETVSC, "unable to allocate send buffer of size %d", netDevice->SendBufferSize);
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ret = -1;
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goto Cleanup;
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}
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ASSERT(((unsigned long)netDevice->SendBuffer & (PAGE_SIZE-1)) == 0); /* page-aligned buffer */
|
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|
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DPRINT_INFO(NETVSC, "Establishing send buffer's GPADL...");
|
|
|
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/*
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* Establish the gpadl handle for this buffer on this
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* channel. Note: This call uses the vmbus connection rather
|
|
* than the channel to establish the gpadl handle.
|
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*/
|
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ret = Device->Driver->VmbusChannelInterface.EstablishGpadl(Device,
|
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netDevice->SendBuffer,
|
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netDevice->SendBufferSize,
|
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&netDevice->SendBufferGpadlHandle);
|
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|
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if (ret != 0)
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{
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DPRINT_ERR(NETVSC, "unable to establish send buffer's gpadl");
|
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goto Cleanup;
|
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}
|
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|
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/* WaitEventWait(ext->ChannelInitEvent); */
|
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|
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/* Notify the NetVsp of the gpadl handle */
|
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DPRINT_INFO(NETVSC, "Sending NvspMessage1TypeSendSendBuffer...");
|
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|
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initPacket = &netDevice->ChannelInitPacket;
|
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|
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memset(initPacket, 0, sizeof(NVSP_MESSAGE));
|
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|
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initPacket->Header.MessageType = NvspMessage1TypeSendSendBuffer;
|
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initPacket->Messages.Version1Messages.SendReceiveBuffer.GpadlHandle = netDevice->SendBufferGpadlHandle;
|
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initPacket->Messages.Version1Messages.SendReceiveBuffer.Id = NETVSC_SEND_BUFFER_ID;
|
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|
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/* Send the gpadl notification request */
|
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ret = Device->Driver->VmbusChannelInterface.SendPacket(Device,
|
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initPacket,
|
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sizeof(NVSP_MESSAGE),
|
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(unsigned long)initPacket,
|
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VmbusPacketTypeDataInBand,
|
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VMBUS_DATA_PACKET_FLAG_COMPLETION_REQUESTED);
|
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if (ret != 0)
|
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{
|
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DPRINT_ERR(NETVSC, "unable to send receive buffer's gpadl to netvsp");
|
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goto Cleanup;
|
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}
|
|
|
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WaitEventWait(netDevice->ChannelInitEvent);
|
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|
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/* Check the response */
|
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if (initPacket->Messages.Version1Messages.SendSendBufferComplete.Status != NvspStatusSuccess)
|
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{
|
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DPRINT_ERR(NETVSC,
|
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"Unable to complete send buffer initialzation with NetVsp - status %d",
|
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initPacket->Messages.Version1Messages.SendSendBufferComplete.Status);
|
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ret = -1;
|
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goto Cleanup;
|
|
}
|
|
|
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netDevice->SendSectionSize = initPacket->Messages.Version1Messages.SendSendBufferComplete.SectionSize;
|
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|
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goto Exit;
|
|
|
|
Cleanup:
|
|
NetVscDestroySendBuffer(netDevice);
|
|
|
|
Exit:
|
|
PutNetDevice(Device);
|
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DPRINT_EXIT(NETVSC);
|
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return ret;
|
|
}
|
|
|
|
static int
|
|
NetVscDestroyReceiveBuffer(
|
|
struct NETVSC_DEVICE *NetDevice
|
|
)
|
|
{
|
|
NVSP_MESSAGE *revokePacket;
|
|
int ret=0;
|
|
|
|
|
|
DPRINT_ENTER(NETVSC);
|
|
|
|
/*
|
|
* 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 (NetDevice->ReceiveSectionCount)
|
|
{
|
|
DPRINT_INFO(NETVSC, "Sending NvspMessage1TypeRevokeReceiveBuffer...");
|
|
|
|
/* Send the revoke receive buffer */
|
|
revokePacket = &NetDevice->RevokePacket;
|
|
memset(revokePacket, 0, sizeof(NVSP_MESSAGE));
|
|
|
|
revokePacket->Header.MessageType = NvspMessage1TypeRevokeReceiveBuffer;
|
|
revokePacket->Messages.Version1Messages.RevokeReceiveBuffer.Id = NETVSC_RECEIVE_BUFFER_ID;
|
|
|
|
ret = NetDevice->Device->Driver->VmbusChannelInterface.SendPacket(NetDevice->Device,
|
|
revokePacket,
|
|
sizeof(NVSP_MESSAGE),
|
|
(unsigned long)revokePacket,
|
|
VmbusPacketTypeDataInBand,
|
|
0);
|
|
/*
|
|
* If we failed here, we might as well return and
|
|
* have a leak rather than continue and a bugchk
|
|
*/
|
|
if (ret != 0)
|
|
{
|
|
DPRINT_ERR(NETVSC, "unable to send revoke receive buffer to netvsp");
|
|
DPRINT_EXIT(NETVSC);
|
|
return -1;
|
|
}
|
|
}
|
|
|
|
/* Teardown the gpadl on the vsp end */
|
|
if (NetDevice->ReceiveBufferGpadlHandle)
|
|
{
|
|
DPRINT_INFO(NETVSC, "Tearing down receive buffer's GPADL...");
|
|
|
|
ret = NetDevice->Device->Driver->VmbusChannelInterface.TeardownGpadl(NetDevice->Device,
|
|
NetDevice->ReceiveBufferGpadlHandle);
|
|
|
|
/* If we failed here, we might as well return and have a leak rather than continue and a bugchk */
|
|
if (ret != 0)
|
|
{
|
|
DPRINT_ERR(NETVSC, "unable to teardown receive buffer's gpadl");
|
|
DPRINT_EXIT(NETVSC);
|
|
return -1;
|
|
}
|
|
NetDevice->ReceiveBufferGpadlHandle = 0;
|
|
}
|
|
|
|
if (NetDevice->ReceiveBuffer)
|
|
{
|
|
DPRINT_INFO(NETVSC, "Freeing up receive buffer...");
|
|
|
|
/* Free up the receive buffer */
|
|
PageFree(NetDevice->ReceiveBuffer, NetDevice->ReceiveBufferSize >> PAGE_SHIFT);
|
|
NetDevice->ReceiveBuffer = NULL;
|
|
}
|
|
|
|
if (NetDevice->ReceiveSections)
|
|
{
|
|
kfree(NetDevice->ReceiveSections);
|
|
NetDevice->ReceiveSections = NULL;
|
|
NetDevice->ReceiveSectionCount = 0;
|
|
}
|
|
|
|
DPRINT_EXIT(NETVSC);
|
|
|
|
return ret;
|
|
}
|
|
|
|
|
|
|
|
|
|
static int
|
|
NetVscDestroySendBuffer(
|
|
struct NETVSC_DEVICE *NetDevice
|
|
)
|
|
{
|
|
NVSP_MESSAGE *revokePacket;
|
|
int ret=0;
|
|
|
|
|
|
DPRINT_ENTER(NETVSC);
|
|
|
|
/*
|
|
* 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 (NetDevice->SendSectionSize)
|
|
{
|
|
DPRINT_INFO(NETVSC, "Sending NvspMessage1TypeRevokeSendBuffer...");
|
|
|
|
/* Send the revoke send buffer */
|
|
revokePacket = &NetDevice->RevokePacket;
|
|
memset(revokePacket, 0, sizeof(NVSP_MESSAGE));
|
|
|
|
revokePacket->Header.MessageType = NvspMessage1TypeRevokeSendBuffer;
|
|
revokePacket->Messages.Version1Messages.RevokeSendBuffer.Id = NETVSC_SEND_BUFFER_ID;
|
|
|
|
ret = NetDevice->Device->Driver->VmbusChannelInterface.SendPacket(NetDevice->Device,
|
|
revokePacket,
|
|
sizeof(NVSP_MESSAGE),
|
|
(unsigned long)revokePacket,
|
|
VmbusPacketTypeDataInBand,
|
|
0);
|
|
/* If we failed here, we might as well return and have a leak rather than continue and a bugchk */
|
|
if (ret != 0)
|
|
{
|
|
DPRINT_ERR(NETVSC, "unable to send revoke send buffer to netvsp");
|
|
DPRINT_EXIT(NETVSC);
|
|
return -1;
|
|
}
|
|
}
|
|
|
|
/* Teardown the gpadl on the vsp end */
|
|
if (NetDevice->SendBufferGpadlHandle)
|
|
{
|
|
DPRINT_INFO(NETVSC, "Tearing down send buffer's GPADL...");
|
|
|
|
ret = NetDevice->Device->Driver->VmbusChannelInterface.TeardownGpadl(NetDevice->Device,
|
|
NetDevice->SendBufferGpadlHandle);
|
|
|
|
/* If we failed here, we might as well return and have a leak rather than continue and a bugchk */
|
|
if (ret != 0)
|
|
{
|
|
DPRINT_ERR(NETVSC, "unable to teardown send buffer's gpadl");
|
|
DPRINT_EXIT(NETVSC);
|
|
return -1;
|
|
}
|
|
NetDevice->SendBufferGpadlHandle = 0;
|
|
}
|
|
|
|
if (NetDevice->SendBuffer)
|
|
{
|
|
DPRINT_INFO(NETVSC, "Freeing up send buffer...");
|
|
|
|
/* Free up the receive buffer */
|
|
PageFree(NetDevice->SendBuffer, NetDevice->SendBufferSize >> PAGE_SHIFT);
|
|
NetDevice->SendBuffer = NULL;
|
|
}
|
|
|
|
DPRINT_EXIT(NETVSC);
|
|
|
|
return ret;
|
|
}
|
|
|
|
|
|
|
|
static int
|
|
NetVscConnectToVsp(
|
|
DEVICE_OBJECT *Device
|
|
)
|
|
{
|
|
int ret=0;
|
|
struct NETVSC_DEVICE *netDevice;
|
|
NVSP_MESSAGE *initPacket;
|
|
int ndisVersion;
|
|
|
|
DPRINT_ENTER(NETVSC);
|
|
|
|
netDevice = GetOutboundNetDevice(Device);
|
|
if (!netDevice)
|
|
{
|
|
DPRINT_ERR(NETVSC, "unable to get net device...device being destroyed?");
|
|
DPRINT_EXIT(NETVSC);
|
|
return -1;
|
|
}
|
|
|
|
initPacket = &netDevice->ChannelInitPacket;
|
|
|
|
memset(initPacket, 0, sizeof(NVSP_MESSAGE));
|
|
initPacket->Header.MessageType = NvspMessageTypeInit;
|
|
initPacket->Messages.InitMessages.Init.MinProtocolVersion = NVSP_MIN_PROTOCOL_VERSION;
|
|
initPacket->Messages.InitMessages.Init.MaxProtocolVersion = NVSP_MAX_PROTOCOL_VERSION;
|
|
|
|
DPRINT_INFO(NETVSC, "Sending NvspMessageTypeInit...");
|
|
|
|
/* Send the init request */
|
|
ret = Device->Driver->VmbusChannelInterface.SendPacket(Device,
|
|
initPacket,
|
|
sizeof(NVSP_MESSAGE),
|
|
(unsigned long)initPacket,
|
|
VmbusPacketTypeDataInBand,
|
|
VMBUS_DATA_PACKET_FLAG_COMPLETION_REQUESTED);
|
|
|
|
if( ret != 0)
|
|
{
|
|
DPRINT_ERR(NETVSC, "unable to send NvspMessageTypeInit");
|
|
goto Cleanup;
|
|
}
|
|
|
|
WaitEventWait(netDevice->ChannelInitEvent);
|
|
|
|
/* Now, check the response */
|
|
/* ASSERT(initPacket->Messages.InitMessages.InitComplete.MaximumMdlChainLength <= MAX_MULTIPAGE_BUFFER_COUNT); */
|
|
DPRINT_INFO(NETVSC, "NvspMessageTypeInit status(%d) max mdl chain (%d)",
|
|
initPacket->Messages.InitMessages.InitComplete.Status,
|
|
initPacket->Messages.InitMessages.InitComplete.MaximumMdlChainLength);
|
|
|
|
if (initPacket->Messages.InitMessages.InitComplete.Status != NvspStatusSuccess)
|
|
{
|
|
DPRINT_ERR(NETVSC, "unable to initialize with netvsp (status 0x%x)", initPacket->Messages.InitMessages.InitComplete.Status);
|
|
ret = -1;
|
|
goto Cleanup;
|
|
}
|
|
|
|
if (initPacket->Messages.InitMessages.InitComplete.NegotiatedProtocolVersion != NVSP_PROTOCOL_VERSION_1)
|
|
{
|
|
DPRINT_ERR(NETVSC, "unable to initialize with netvsp (version expected 1 got %d)",
|
|
initPacket->Messages.InitMessages.InitComplete.NegotiatedProtocolVersion);
|
|
ret = -1;
|
|
goto Cleanup;
|
|
}
|
|
DPRINT_INFO(NETVSC, "Sending NvspMessage1TypeSendNdisVersion...");
|
|
|
|
/* Send the ndis version */
|
|
memset(initPacket, 0, sizeof(NVSP_MESSAGE));
|
|
|
|
ndisVersion = 0x00050000;
|
|
|
|
initPacket->Header.MessageType = NvspMessage1TypeSendNdisVersion;
|
|
initPacket->Messages.Version1Messages.SendNdisVersion.NdisMajorVersion = (ndisVersion & 0xFFFF0000) >> 16;
|
|
initPacket->Messages.Version1Messages.SendNdisVersion.NdisMinorVersion = ndisVersion & 0xFFFF;
|
|
|
|
/* Send the init request */
|
|
ret = Device->Driver->VmbusChannelInterface.SendPacket(Device,
|
|
initPacket,
|
|
sizeof(NVSP_MESSAGE),
|
|
(unsigned long)initPacket,
|
|
VmbusPacketTypeDataInBand,
|
|
0);
|
|
if (ret != 0)
|
|
{
|
|
DPRINT_ERR(NETVSC, "unable to send NvspMessage1TypeSendNdisVersion");
|
|
ret = -1;
|
|
goto Cleanup;
|
|
}
|
|
/*
|
|
* BUGBUG - We have to wait for the above msg since the
|
|
* netvsp uses KMCL which acknowledges packet (completion
|
|
* packet) since our Vmbus always set the
|
|
* VMBUS_DATA_PACKET_FLAG_COMPLETION_REQUESTED flag
|
|
*/
|
|
/* WaitEventWait(NetVscChannel->ChannelInitEvent); */
|
|
|
|
/* Post the big receive buffer to NetVSP */
|
|
ret = NetVscInitializeReceiveBufferWithNetVsp(Device);
|
|
if (ret == 0)
|
|
{
|
|
ret = NetVscInitializeSendBufferWithNetVsp(Device);
|
|
}
|
|
|
|
Cleanup:
|
|
PutNetDevice(Device);
|
|
DPRINT_EXIT(NETVSC);
|
|
return ret;
|
|
}
|
|
|
|
static void
|
|
NetVscDisconnectFromVsp(
|
|
struct NETVSC_DEVICE *NetDevice
|
|
)
|
|
{
|
|
DPRINT_ENTER(NETVSC);
|
|
|
|
NetVscDestroyReceiveBuffer(NetDevice);
|
|
NetVscDestroySendBuffer(NetDevice);
|
|
|
|
DPRINT_EXIT(NETVSC);
|
|
}
|
|
|
|
|
|
/*++
|
|
|
|
Name:
|
|
NetVscOnDeviceAdd()
|
|
|
|
Description:
|
|
Callback when the device belonging to this driver is added
|
|
|
|
--*/
|
|
int
|
|
NetVscOnDeviceAdd(
|
|
DEVICE_OBJECT *Device,
|
|
void *AdditionalInfo
|
|
)
|
|
{
|
|
int ret=0;
|
|
int i;
|
|
|
|
struct NETVSC_DEVICE *netDevice;
|
|
NETVSC_PACKET* packet;
|
|
LIST_ENTRY *entry;
|
|
|
|
NETVSC_DRIVER_OBJECT *netDriver = (NETVSC_DRIVER_OBJECT*) Device->Driver;;
|
|
|
|
DPRINT_ENTER(NETVSC);
|
|
|
|
netDevice = AllocNetDevice(Device);
|
|
if (!netDevice)
|
|
{
|
|
ret = -1;
|
|
goto Cleanup;
|
|
}
|
|
|
|
DPRINT_DBG(NETVSC, "netvsc channel object allocated - %p", netDevice);
|
|
|
|
/* Initialize the NetVSC channel extension */
|
|
netDevice->ReceiveBufferSize = NETVSC_RECEIVE_BUFFER_SIZE;
|
|
spin_lock_init(&netDevice->receive_packet_list_lock);
|
|
|
|
netDevice->SendBufferSize = NETVSC_SEND_BUFFER_SIZE;
|
|
|
|
INITIALIZE_LIST_HEAD(&netDevice->ReceivePacketList);
|
|
|
|
for (i=0; i < NETVSC_RECEIVE_PACKETLIST_COUNT; i++)
|
|
{
|
|
packet = kzalloc(sizeof(NETVSC_PACKET) + (NETVSC_RECEIVE_SG_COUNT* sizeof(PAGE_BUFFER)), GFP_KERNEL);
|
|
if (!packet)
|
|
{
|
|
DPRINT_DBG(NETVSC, "unable to allocate netvsc pkts for receive pool (wanted %d got %d)", NETVSC_RECEIVE_PACKETLIST_COUNT, i);
|
|
break;
|
|
}
|
|
|
|
INSERT_TAIL_LIST(&netDevice->ReceivePacketList, &packet->ListEntry);
|
|
}
|
|
netDevice->ChannelInitEvent = WaitEventCreate();
|
|
|
|
/* Open the channel */
|
|
ret = Device->Driver->VmbusChannelInterface.Open(Device,
|
|
netDriver->RingBufferSize,
|
|
netDriver->RingBufferSize,
|
|
NULL, 0,
|
|
NetVscOnChannelCallback,
|
|
Device
|
|
);
|
|
|
|
if (ret != 0)
|
|
{
|
|
DPRINT_ERR(NETVSC, "unable to open channel: %d", ret);
|
|
ret = -1;
|
|
goto Cleanup;
|
|
}
|
|
|
|
/* Channel is opened */
|
|
DPRINT_INFO(NETVSC, "*** NetVSC channel opened successfully! ***");
|
|
|
|
/* Connect with the NetVsp */
|
|
ret = NetVscConnectToVsp(Device);
|
|
if (ret != 0)
|
|
{
|
|
DPRINT_ERR(NETVSC, "unable to connect to NetVSP - %d", ret);
|
|
ret = -1;
|
|
goto Close;
|
|
}
|
|
|
|
DPRINT_INFO(NETVSC, "*** NetVSC channel handshake result - %d ***", ret);
|
|
|
|
DPRINT_EXIT(NETVSC);
|
|
return ret;
|
|
|
|
Close:
|
|
/* Now, we can close the channel safely */
|
|
Device->Driver->VmbusChannelInterface.Close(Device);
|
|
|
|
Cleanup:
|
|
|
|
if (netDevice)
|
|
{
|
|
WaitEventClose(netDevice->ChannelInitEvent);
|
|
|
|
while (!IsListEmpty(&netDevice->ReceivePacketList))
|
|
{
|
|
entry = REMOVE_HEAD_LIST(&netDevice->ReceivePacketList);
|
|
packet = CONTAINING_RECORD(entry, NETVSC_PACKET, ListEntry);
|
|
kfree(packet);
|
|
}
|
|
|
|
ReleaseOutboundNetDevice(Device);
|
|
ReleaseInboundNetDevice(Device);
|
|
|
|
FreeNetDevice(netDevice);
|
|
}
|
|
|
|
DPRINT_EXIT(NETVSC);
|
|
return ret;
|
|
}
|
|
|
|
|
|
/*++
|
|
|
|
Name:
|
|
NetVscOnDeviceRemove()
|
|
|
|
Description:
|
|
Callback when the root bus device is removed
|
|
|
|
--*/
|
|
int
|
|
NetVscOnDeviceRemove(
|
|
DEVICE_OBJECT *Device
|
|
)
|
|
{
|
|
struct NETVSC_DEVICE *netDevice;
|
|
NETVSC_PACKET *netvscPacket;
|
|
int ret=0;
|
|
LIST_ENTRY *entry;
|
|
|
|
DPRINT_ENTER(NETVSC);
|
|
|
|
DPRINT_INFO(NETVSC, "Disabling outbound traffic on net device (%p)...", Device->Extension);
|
|
|
|
/* Stop outbound traffic ie sends and receives completions */
|
|
netDevice = ReleaseOutboundNetDevice(Device);
|
|
if (!netDevice)
|
|
{
|
|
DPRINT_ERR(NETVSC, "No net device present!!");
|
|
return -1;
|
|
}
|
|
|
|
/* Wait for all send completions */
|
|
while (netDevice->NumOutstandingSends)
|
|
{
|
|
DPRINT_INFO(NETVSC, "waiting for %d requests to complete...", netDevice->NumOutstandingSends);
|
|
|
|
udelay(100);
|
|
}
|
|
|
|
DPRINT_INFO(NETVSC, "Disconnecting from netvsp...");
|
|
|
|
NetVscDisconnectFromVsp(netDevice);
|
|
|
|
DPRINT_INFO(NETVSC, "Disabling inbound traffic on net device (%p)...", Device->Extension);
|
|
|
|
/* Stop inbound traffic ie receives and sends completions */
|
|
netDevice = ReleaseInboundNetDevice(Device);
|
|
|
|
/* At this point, no one should be accessing netDevice except in here */
|
|
DPRINT_INFO(NETVSC, "net device (%p) safe to remove", netDevice);
|
|
|
|
/* Now, we can close the channel safely */
|
|
Device->Driver->VmbusChannelInterface.Close(Device);
|
|
|
|
/* Release all resources */
|
|
while (!IsListEmpty(&netDevice->ReceivePacketList))
|
|
{
|
|
entry = REMOVE_HEAD_LIST(&netDevice->ReceivePacketList);
|
|
netvscPacket = CONTAINING_RECORD(entry, NETVSC_PACKET, ListEntry);
|
|
|
|
kfree(netvscPacket);
|
|
}
|
|
|
|
WaitEventClose(netDevice->ChannelInitEvent);
|
|
FreeNetDevice(netDevice);
|
|
|
|
DPRINT_EXIT(NETVSC);
|
|
return ret;
|
|
}
|
|
|
|
|
|
|
|
/*++
|
|
|
|
Name:
|
|
NetVscOnCleanup()
|
|
|
|
Description:
|
|
Perform any cleanup when the driver is removed
|
|
|
|
--*/
|
|
void
|
|
NetVscOnCleanup(
|
|
DRIVER_OBJECT *drv
|
|
)
|
|
{
|
|
DPRINT_ENTER(NETVSC);
|
|
|
|
DPRINT_EXIT(NETVSC);
|
|
}
|
|
|
|
static void
|
|
NetVscOnSendCompletion(
|
|
DEVICE_OBJECT *Device,
|
|
VMPACKET_DESCRIPTOR *Packet
|
|
)
|
|
{
|
|
struct NETVSC_DEVICE *netDevice;
|
|
NVSP_MESSAGE *nvspPacket;
|
|
NETVSC_PACKET *nvscPacket;
|
|
|
|
DPRINT_ENTER(NETVSC);
|
|
|
|
netDevice = GetInboundNetDevice(Device);
|
|
if (!netDevice)
|
|
{
|
|
DPRINT_ERR(NETVSC, "unable to get net device...device being destroyed?");
|
|
DPRINT_EXIT(NETVSC);
|
|
return;
|
|
}
|
|
|
|
nvspPacket = (NVSP_MESSAGE*)((unsigned long)Packet + (Packet->DataOffset8 << 3));
|
|
|
|
DPRINT_DBG(NETVSC, "send completion packet - type %d", nvspPacket->Header.MessageType);
|
|
|
|
if (nvspPacket->Header.MessageType == NvspMessageTypeInitComplete ||
|
|
nvspPacket->Header.MessageType == NvspMessage1TypeSendReceiveBufferComplete ||
|
|
nvspPacket->Header.MessageType == NvspMessage1TypeSendSendBufferComplete)
|
|
{
|
|
/* Copy the response back */
|
|
memcpy(&netDevice->ChannelInitPacket, nvspPacket, sizeof(NVSP_MESSAGE));
|
|
WaitEventSet(netDevice->ChannelInitEvent);
|
|
}
|
|
else if (nvspPacket->Header.MessageType == NvspMessage1TypeSendRNDISPacketComplete)
|
|
{
|
|
/* Get the send context */
|
|
nvscPacket = (NETVSC_PACKET *)(unsigned long)Packet->TransactionId;
|
|
ASSERT(nvscPacket);
|
|
|
|
/* Notify the layer above us */
|
|
nvscPacket->Completion.Send.OnSendCompletion(nvscPacket->Completion.Send.SendCompletionContext);
|
|
|
|
InterlockedDecrement(&netDevice->NumOutstandingSends);
|
|
}
|
|
else
|
|
{
|
|
DPRINT_ERR(NETVSC, "Unknown send completion packet type - %d received!!", nvspPacket->Header.MessageType);
|
|
}
|
|
|
|
PutNetDevice(Device);
|
|
DPRINT_EXIT(NETVSC);
|
|
}
|
|
|
|
|
|
|
|
static int
|
|
NetVscOnSend(
|
|
DEVICE_OBJECT *Device,
|
|
NETVSC_PACKET *Packet
|
|
)
|
|
{
|
|
struct NETVSC_DEVICE *netDevice;
|
|
int ret=0;
|
|
|
|
NVSP_MESSAGE sendMessage;
|
|
|
|
DPRINT_ENTER(NETVSC);
|
|
|
|
netDevice = GetOutboundNetDevice(Device);
|
|
if (!netDevice)
|
|
{
|
|
DPRINT_ERR(NETVSC, "net device (%p) shutting down...ignoring outbound packets", netDevice);
|
|
DPRINT_EXIT(NETVSC);
|
|
return -2;
|
|
}
|
|
|
|
sendMessage.Header.MessageType = NvspMessage1TypeSendRNDISPacket;
|
|
if (Packet->IsDataPacket)
|
|
sendMessage.Messages.Version1Messages.SendRNDISPacket.ChannelType = 0;/* 0 is RMC_DATA; */
|
|
else
|
|
sendMessage.Messages.Version1Messages.SendRNDISPacket.ChannelType = 1;/* 1 is RMC_CONTROL; */
|
|
|
|
/* Not using send buffer section */
|
|
sendMessage.Messages.Version1Messages.SendRNDISPacket.SendBufferSectionIndex = 0xFFFFFFFF;
|
|
sendMessage.Messages.Version1Messages.SendRNDISPacket.SendBufferSectionSize = 0;
|
|
|
|
if (Packet->PageBufferCount)
|
|
{
|
|
ret = Device->Driver->VmbusChannelInterface.SendPacketPageBuffer(Device,
|
|
Packet->PageBuffers,
|
|
Packet->PageBufferCount,
|
|
&sendMessage,
|
|
sizeof(NVSP_MESSAGE),
|
|
(unsigned long)Packet);
|
|
}
|
|
else
|
|
{
|
|
ret = Device->Driver->VmbusChannelInterface.SendPacket(Device,
|
|
&sendMessage,
|
|
sizeof(NVSP_MESSAGE),
|
|
(unsigned long)Packet,
|
|
VmbusPacketTypeDataInBand,
|
|
VMBUS_DATA_PACKET_FLAG_COMPLETION_REQUESTED);
|
|
|
|
}
|
|
|
|
if (ret != 0)
|
|
{
|
|
DPRINT_ERR(NETVSC, "Unable to send packet %p ret %d", Packet, ret);
|
|
}
|
|
|
|
InterlockedIncrement(&netDevice->NumOutstandingSends);
|
|
PutNetDevice(Device);
|
|
|
|
DPRINT_EXIT(NETVSC);
|
|
return ret;
|
|
}
|
|
|
|
|
|
static void
|
|
NetVscOnReceive(
|
|
DEVICE_OBJECT *Device,
|
|
VMPACKET_DESCRIPTOR *Packet
|
|
)
|
|
{
|
|
struct NETVSC_DEVICE *netDevice;
|
|
VMTRANSFER_PAGE_PACKET_HEADER *vmxferpagePacket;
|
|
NVSP_MESSAGE *nvspPacket;
|
|
NETVSC_PACKET *netvscPacket=NULL;
|
|
LIST_ENTRY* entry;
|
|
unsigned long start;
|
|
unsigned long end, endVirtual;
|
|
/* NETVSC_DRIVER_OBJECT *netvscDriver; */
|
|
XFERPAGE_PACKET *xferpagePacket=NULL;
|
|
LIST_ENTRY listHead;
|
|
|
|
int i=0, j=0;
|
|
int count=0, bytesRemain=0;
|
|
unsigned long flags;
|
|
|
|
DPRINT_ENTER(NETVSC);
|
|
|
|
netDevice = GetInboundNetDevice(Device);
|
|
if (!netDevice)
|
|
{
|
|
DPRINT_ERR(NETVSC, "unable to get net device...device being destroyed?");
|
|
DPRINT_EXIT(NETVSC);
|
|
return;
|
|
}
|
|
|
|
/* All inbound packets other than send completion should be xfer page packet */
|
|
if (Packet->Type != VmbusPacketTypeDataUsingTransferPages)
|
|
{
|
|
DPRINT_ERR(NETVSC, "Unknown packet type received - %d", Packet->Type);
|
|
PutNetDevice(Device);
|
|
return;
|
|
}
|
|
|
|
nvspPacket = (NVSP_MESSAGE*)((unsigned long)Packet + (Packet->DataOffset8 << 3));
|
|
|
|
/* Make sure this is a valid nvsp packet */
|
|
if (nvspPacket->Header.MessageType != NvspMessage1TypeSendRNDISPacket )
|
|
{
|
|
DPRINT_ERR(NETVSC, "Unknown nvsp packet type received - %d", nvspPacket->Header.MessageType);
|
|
PutNetDevice(Device);
|
|
return;
|
|
}
|
|
|
|
DPRINT_DBG(NETVSC, "NVSP packet received - type %d", nvspPacket->Header.MessageType);
|
|
|
|
vmxferpagePacket = (VMTRANSFER_PAGE_PACKET_HEADER*)Packet;
|
|
|
|
if (vmxferpagePacket->TransferPageSetId != NETVSC_RECEIVE_BUFFER_ID)
|
|
{
|
|
DPRINT_ERR(NETVSC, "Invalid xfer page set id - expecting %x got %x", NETVSC_RECEIVE_BUFFER_ID, vmxferpagePacket->TransferPageSetId);
|
|
PutNetDevice(Device);
|
|
return;
|
|
}
|
|
|
|
DPRINT_DBG(NETVSC, "xfer page - range count %d", vmxferpagePacket->RangeCount);
|
|
|
|
INITIALIZE_LIST_HEAD(&listHead);
|
|
|
|
/*
|
|
* 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(&netDevice->receive_packet_list_lock, flags);
|
|
while (!IsListEmpty(&netDevice->ReceivePacketList))
|
|
{
|
|
entry = REMOVE_HEAD_LIST(&netDevice->ReceivePacketList);
|
|
netvscPacket = CONTAINING_RECORD(entry, NETVSC_PACKET, ListEntry);
|
|
|
|
INSERT_TAIL_LIST(&listHead, &netvscPacket->ListEntry);
|
|
|
|
if (++count == vmxferpagePacket->RangeCount + 1)
|
|
break;
|
|
}
|
|
spin_unlock_irqrestore(&netDevice->receive_packet_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)
|
|
{
|
|
DPRINT_ERR(NETVSC, "Got only %d netvsc pkt...needed %d pkts. Dropping this xfer page packet completely!", count, vmxferpagePacket->RangeCount+1);
|
|
|
|
/* Return it to the freelist */
|
|
spin_lock_irqsave(&netDevice->receive_packet_list_lock, flags);
|
|
for (i=count; i != 0; i--)
|
|
{
|
|
entry = REMOVE_HEAD_LIST(&listHead);
|
|
netvscPacket = CONTAINING_RECORD(entry, NETVSC_PACKET, ListEntry);
|
|
|
|
INSERT_TAIL_LIST(&netDevice->ReceivePacketList, &netvscPacket->ListEntry);
|
|
}
|
|
spin_unlock_irqrestore(&netDevice->receive_packet_list_lock, flags);
|
|
|
|
NetVscSendReceiveCompletion(Device, vmxferpagePacket->d.TransactionId);
|
|
|
|
PutNetDevice(Device);
|
|
return;
|
|
}
|
|
|
|
/* Remove the 1st packet to represent the xfer page packet itself */
|
|
entry = REMOVE_HEAD_LIST(&listHead);
|
|
xferpagePacket = CONTAINING_RECORD(entry, XFERPAGE_PACKET, ListEntry);
|
|
xferpagePacket->Count = count - 1; /* This is how much we can satisfy */
|
|
ASSERT(xferpagePacket->Count > 0 && xferpagePacket->Count <= vmxferpagePacket->RangeCount);
|
|
|
|
if (xferpagePacket->Count != vmxferpagePacket->RangeCount)
|
|
{
|
|
DPRINT_INFO(NETVSC, "Needed %d netvsc pkts to satisy this xfer page...got %d", vmxferpagePacket->RangeCount, xferpagePacket->Count);
|
|
}
|
|
|
|
/* Each range represents 1 RNDIS pkt that contains 1 ethernet frame */
|
|
for (i=0; i < (count - 1); i++)
|
|
{
|
|
entry = REMOVE_HEAD_LIST(&listHead);
|
|
netvscPacket = CONTAINING_RECORD(entry, NETVSC_PACKET, ListEntry);
|
|
|
|
/* Initialize the netvsc packet */
|
|
netvscPacket->XferPagePacket = xferpagePacket;
|
|
netvscPacket->Completion.Recv.OnReceiveCompletion = NetVscOnReceiveCompletion;
|
|
netvscPacket->Completion.Recv.ReceiveCompletionContext = netvscPacket;
|
|
netvscPacket->Device = Device;
|
|
netvscPacket->Completion.Recv.ReceiveCompletionTid = vmxferpagePacket->d.TransactionId; /* Save this so that we can send it back */
|
|
|
|
netvscPacket->TotalDataBufferLength = vmxferpagePacket->Ranges[i].ByteCount;
|
|
netvscPacket->PageBufferCount = 1;
|
|
|
|
ASSERT(vmxferpagePacket->Ranges[i].ByteOffset + vmxferpagePacket->Ranges[i].ByteCount < netDevice->ReceiveBufferSize);
|
|
|
|
netvscPacket->PageBuffers[0].Length = vmxferpagePacket->Ranges[i].ByteCount;
|
|
|
|
start = GetPhysicalAddress((void*)((unsigned long)netDevice->ReceiveBuffer + vmxferpagePacket->Ranges[i].ByteOffset));
|
|
|
|
netvscPacket->PageBuffers[0].Pfn = start >> PAGE_SHIFT;
|
|
endVirtual = (unsigned long)netDevice->ReceiveBuffer
|
|
+ vmxferpagePacket->Ranges[i].ByteOffset
|
|
+ vmxferpagePacket->Ranges[i].ByteCount -1;
|
|
end = GetPhysicalAddress((void*)endVirtual);
|
|
|
|
/* Calculate the page relative offset */
|
|
netvscPacket->PageBuffers[0].Offset = vmxferpagePacket->Ranges[i].ByteOffset & (PAGE_SIZE -1);
|
|
if ((end >> PAGE_SHIFT) != (start>>PAGE_SHIFT)) {
|
|
/* Handle frame across multiple pages: */
|
|
netvscPacket->PageBuffers[0].Length =
|
|
(netvscPacket->PageBuffers[0].Pfn <<PAGE_SHIFT) + PAGE_SIZE - start;
|
|
bytesRemain = netvscPacket->TotalDataBufferLength - netvscPacket->PageBuffers[0].Length;
|
|
for (j=1; j<NETVSC_PACKET_MAXPAGE; j++) {
|
|
netvscPacket->PageBuffers[j].Offset = 0;
|
|
if (bytesRemain <= PAGE_SIZE) {
|
|
netvscPacket->PageBuffers[j].Length = bytesRemain;
|
|
bytesRemain = 0;
|
|
} else {
|
|
netvscPacket->PageBuffers[j].Length = PAGE_SIZE;
|
|
bytesRemain -= PAGE_SIZE;
|
|
}
|
|
netvscPacket->PageBuffers[j].Pfn =
|
|
GetPhysicalAddress((void*)(endVirtual - bytesRemain)) >> PAGE_SHIFT;
|
|
netvscPacket->PageBufferCount++;
|
|
if (bytesRemain == 0)
|
|
break;
|
|
}
|
|
ASSERT(bytesRemain == 0);
|
|
}
|
|
DPRINT_DBG(NETVSC, "[%d] - (abs offset %u len %u) => (pfn %llx, offset %u, len %u)",
|
|
i,
|
|
vmxferpagePacket->Ranges[i].ByteOffset,
|
|
vmxferpagePacket->Ranges[i].ByteCount,
|
|
netvscPacket->PageBuffers[0].Pfn,
|
|
netvscPacket->PageBuffers[0].Offset,
|
|
netvscPacket->PageBuffers[0].Length);
|
|
|
|
/* Pass it to the upper layer */
|
|
((NETVSC_DRIVER_OBJECT*)Device->Driver)->OnReceiveCallback(Device, netvscPacket);
|
|
|
|
NetVscOnReceiveCompletion(netvscPacket->Completion.Recv.ReceiveCompletionContext);
|
|
}
|
|
|
|
ASSERT(IsListEmpty(&listHead));
|
|
|
|
PutNetDevice(Device);
|
|
DPRINT_EXIT(NETVSC);
|
|
}
|
|
|
|
|
|
static void
|
|
NetVscSendReceiveCompletion(
|
|
DEVICE_OBJECT *Device,
|
|
u64 TransactionId
|
|
)
|
|
{
|
|
NVSP_MESSAGE recvcompMessage;
|
|
int retries=0;
|
|
int ret=0;
|
|
|
|
DPRINT_DBG(NETVSC, "Sending receive completion pkt - %llx", TransactionId);
|
|
|
|
recvcompMessage.Header.MessageType = NvspMessage1TypeSendRNDISPacketComplete;
|
|
|
|
/* FIXME: Pass in the status */
|
|
recvcompMessage.Messages.Version1Messages.SendRNDISPacketComplete.Status = NvspStatusSuccess;
|
|
|
|
retry_send_cmplt:
|
|
/* Send the completion */
|
|
ret = Device->Driver->VmbusChannelInterface.SendPacket(Device,
|
|
&recvcompMessage,
|
|
sizeof(NVSP_MESSAGE),
|
|
TransactionId,
|
|
VmbusPacketTypeCompletion,
|
|
0);
|
|
if (ret == 0) /* success */
|
|
{
|
|
/* no-op */
|
|
}
|
|
else if (ret == -1) /* no more room...wait a bit and attempt to retry 3 times */
|
|
{
|
|
retries++;
|
|
DPRINT_ERR(NETVSC, "unable to send receive completion pkt (tid %llx)...retrying %d", TransactionId, retries);
|
|
|
|
if (retries < 4)
|
|
{
|
|
udelay(100);
|
|
goto retry_send_cmplt;
|
|
}
|
|
else
|
|
{
|
|
DPRINT_ERR(NETVSC, "unable to send receive completion pkt (tid %llx)...give up retrying", TransactionId);
|
|
}
|
|
}
|
|
else
|
|
{
|
|
DPRINT_ERR(NETVSC, "unable to send receive completion pkt - %llx", TransactionId);
|
|
}
|
|
}
|
|
|
|
/* Send a receive completion packet to RNDIS device (ie NetVsp) */
|
|
static void
|
|
NetVscOnReceiveCompletion(
|
|
void * Context)
|
|
{
|
|
NETVSC_PACKET *packet = (NETVSC_PACKET*)Context;
|
|
DEVICE_OBJECT *device = (DEVICE_OBJECT*)packet->Device;
|
|
struct NETVSC_DEVICE *netDevice;
|
|
u64 transactionId=0;
|
|
bool fSendReceiveComp = false;
|
|
unsigned long flags;
|
|
|
|
DPRINT_ENTER(NETVSC);
|
|
|
|
ASSERT(packet->XferPagePacket);
|
|
|
|
/* 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. */
|
|
netDevice = GetInboundNetDevice(device);
|
|
if (!netDevice)
|
|
{
|
|
DPRINT_ERR(NETVSC, "unable to get net device...device being destroyed?");
|
|
DPRINT_EXIT(NETVSC);
|
|
return;
|
|
}
|
|
|
|
/* Overloading use of the lock. */
|
|
spin_lock_irqsave(&netDevice->receive_packet_list_lock, flags);
|
|
|
|
ASSERT(packet->XferPagePacket->Count > 0);
|
|
packet->XferPagePacket->Count--;
|
|
|
|
/* Last one in the line that represent 1 xfer page packet. */
|
|
/* Return the xfer page packet itself to the freelist */
|
|
if (packet->XferPagePacket->Count == 0)
|
|
{
|
|
fSendReceiveComp = true;
|
|
transactionId = packet->Completion.Recv.ReceiveCompletionTid;
|
|
|
|
INSERT_TAIL_LIST(&netDevice->ReceivePacketList, &packet->XferPagePacket->ListEntry);
|
|
}
|
|
|
|
/* Put the packet back */
|
|
INSERT_TAIL_LIST(&netDevice->ReceivePacketList, &packet->ListEntry);
|
|
spin_unlock_irqrestore(&netDevice->receive_packet_list_lock, flags);
|
|
|
|
/* Send a receive completion for the xfer page packet */
|
|
if (fSendReceiveComp)
|
|
{
|
|
NetVscSendReceiveCompletion(device, transactionId);
|
|
}
|
|
|
|
PutNetDevice(device);
|
|
DPRINT_EXIT(NETVSC);
|
|
}
|
|
|
|
|
|
|
|
void
|
|
NetVscOnChannelCallback(
|
|
void * Context
|
|
)
|
|
{
|
|
const int netPacketSize=2048;
|
|
int ret=0;
|
|
DEVICE_OBJECT *device=(DEVICE_OBJECT*)Context;
|
|
struct NETVSC_DEVICE *netDevice;
|
|
|
|
u32 bytesRecvd;
|
|
u64 requestId;
|
|
unsigned char packet[netPacketSize];
|
|
VMPACKET_DESCRIPTOR *desc;
|
|
unsigned char *buffer=packet;
|
|
int bufferlen=netPacketSize;
|
|
|
|
|
|
DPRINT_ENTER(NETVSC);
|
|
|
|
ASSERT(device);
|
|
|
|
netDevice = GetInboundNetDevice(device);
|
|
if (!netDevice)
|
|
{
|
|
DPRINT_ERR(NETVSC, "net device (%p) shutting down...ignoring inbound packets", netDevice);
|
|
DPRINT_EXIT(NETVSC);
|
|
return;
|
|
}
|
|
|
|
do
|
|
{
|
|
ret = device->Driver->VmbusChannelInterface.RecvPacketRaw(device,
|
|
buffer,
|
|
bufferlen,
|
|
&bytesRecvd,
|
|
&requestId);
|
|
|
|
if (ret == 0)
|
|
{
|
|
if (bytesRecvd > 0)
|
|
{
|
|
DPRINT_DBG(NETVSC, "receive %d bytes, tid %llx", bytesRecvd, requestId);
|
|
|
|
desc = (VMPACKET_DESCRIPTOR*)buffer;
|
|
switch (desc->Type)
|
|
{
|
|
case VmbusPacketTypeCompletion:
|
|
NetVscOnSendCompletion(device, desc);
|
|
break;
|
|
|
|
case VmbusPacketTypeDataUsingTransferPages:
|
|
NetVscOnReceive(device, desc);
|
|
break;
|
|
|
|
default:
|
|
DPRINT_ERR(NETVSC, "unhandled packet type %d, tid %llx len %d\n", desc->Type, requestId, bytesRecvd);
|
|
break;
|
|
}
|
|
|
|
/* reset */
|
|
if (bufferlen > netPacketSize)
|
|
{
|
|
kfree(buffer);
|
|
|
|
buffer = packet;
|
|
bufferlen = netPacketSize;
|
|
}
|
|
}
|
|
else
|
|
{
|
|
/* DPRINT_DBG(NETVSC, "nothing else to read..."); */
|
|
|
|
/* reset */
|
|
if (bufferlen > netPacketSize)
|
|
{
|
|
kfree(buffer);
|
|
|
|
buffer = packet;
|
|
bufferlen = netPacketSize;
|
|
}
|
|
|
|
break;
|
|
}
|
|
}
|
|
else if (ret == -2) /* Handle large packet */
|
|
{
|
|
buffer = kmalloc(bytesRecvd, GFP_ATOMIC);
|
|
if (buffer == NULL)
|
|
{
|
|
/* Try again next time around */
|
|
DPRINT_ERR(NETVSC, "unable to allocate buffer of size (%d)!!", bytesRecvd);
|
|
break;
|
|
}
|
|
|
|
bufferlen = bytesRecvd;
|
|
}
|
|
else
|
|
{
|
|
ASSERT(0);
|
|
}
|
|
} while (1);
|
|
|
|
PutNetDevice(device);
|
|
DPRINT_EXIT(NETVSC);
|
|
return;
|
|
}
|