![Greg Kroah-Hartman](/assets/img/avatar_default.png)
Cc: Hank Janssen <hjanssen@microsoft.com> Cc: Haiyang Zhang <haiyangz@microsoft.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
1394 lines
39 KiB
C
1394 lines
39 KiB
C
/*
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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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* Haiyang Zhang <haiyangz@microsoft.com>
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* Hank Janssen <hjanssen@microsoft.com>
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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 <linux/io.h>
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#include <linux/slab.h>
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#include "osd.h"
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#include "logging.h"
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#include "netvsc.h"
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#include "rndis_filter.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 struct hv_guid gNetVscDeviceType = {
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.data = {
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0x63, 0x51, 0x61, 0xF8, 0x3E, 0xDF, 0xc5, 0x46,
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0x91, 0x3F, 0xF2, 0xD2, 0xF9, 0x65, 0xED, 0x0E
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}
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};
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static int NetVscOnDeviceAdd(struct hv_device *Device, void *AdditionalInfo);
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static int NetVscOnDeviceRemove(struct hv_device *Device);
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static void NetVscOnCleanup(struct hv_driver *Driver);
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static void NetVscOnChannelCallback(void *context);
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static int NetVscInitializeSendBufferWithNetVsp(struct hv_device *Device);
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static int NetVscInitializeReceiveBufferWithNetVsp(struct hv_device *Device);
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static int NetVscDestroySendBuffer(struct netvsc_device *NetDevice);
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static int NetVscDestroyReceiveBuffer(struct netvsc_device *NetDevice);
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static int NetVscConnectToVsp(struct hv_device *Device);
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static void NetVscOnSendCompletion(struct hv_device *Device,
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struct vmpacket_descriptor *Packet);
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static int NetVscOnSend(struct hv_device *Device,
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struct hv_netvsc_packet *Packet);
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static void NetVscOnReceive(struct hv_device *Device,
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struct vmpacket_descriptor *Packet);
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static void NetVscOnReceiveCompletion(void *Context);
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static void NetVscSendReceiveCompletion(struct hv_device *Device,
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u64 TransactionId);
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static struct netvsc_device *AllocNetDevice(struct hv_device *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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atomic_cmpxchg(&netDevice->RefCount, 0, 2);
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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 void FreeNetDevice(struct netvsc_device *Device)
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{
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WARN_ON(atomic_read(&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 struct netvsc_device *GetOutboundNetDevice(struct hv_device *Device)
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{
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struct netvsc_device *netDevice;
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netDevice = Device->Extension;
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if (netDevice && atomic_read(&netDevice->RefCount) > 1)
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atomic_inc(&netDevice->RefCount);
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else
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netDevice = NULL;
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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 struct netvsc_device *GetInboundNetDevice(struct hv_device *Device)
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{
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struct netvsc_device *netDevice;
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netDevice = Device->Extension;
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if (netDevice && atomic_read(&netDevice->RefCount))
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atomic_inc(&netDevice->RefCount);
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else
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netDevice = NULL;
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return netDevice;
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}
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static void PutNetDevice(struct hv_device *Device)
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{
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struct netvsc_device *netDevice;
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netDevice = Device->Extension;
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/* ASSERT(netDevice); */
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atomic_dec(&netDevice->RefCount);
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}
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static struct netvsc_device *ReleaseOutboundNetDevice(struct hv_device *Device)
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{
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struct netvsc_device *netDevice;
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netDevice = 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 (atomic_cmpxchg(&netDevice->RefCount, 2, 1) != 2)
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udelay(100);
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return netDevice;
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}
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static struct netvsc_device *ReleaseInboundNetDevice(struct hv_device *Device)
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{
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struct netvsc_device *netDevice;
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netDevice = 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 (atomic_cmpxchg(&netDevice->RefCount, 1, 0) != 1)
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udelay(100);
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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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* NetVscInitialize - Main entry point
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*/
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int NetVscInitialize(struct hv_driver *drv)
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{
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struct netvsc_driver *driver = (struct netvsc_driver *)drv;
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DPRINT_ENTER(NETVSC);
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DPRINT_DBG(NETVSC, "sizeof(struct hv_netvsc_packet)=%zd, "
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"sizeof(struct nvsp_message)=%zd, "
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"sizeof(struct vmtransfer_page_packet_header)=%zd",
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sizeof(struct hv_netvsc_packet),
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sizeof(struct nvsp_message),
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sizeof(struct 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(struct hv_guid));
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/* Make sure it is set by the caller */
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/* FIXME: These probably should still be tested in some way */
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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 0;
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}
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static int NetVscInitializeReceiveBufferWithNetVsp(struct hv_device *Device)
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{
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int ret = 0;
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struct netvsc_device *netDevice;
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struct 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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DPRINT_ERR(NETVSC, "unable to get net device..."
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"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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/* page-size grandularity */
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/* ASSERT((netDevice->ReceiveBufferSize & (PAGE_SIZE - 1)) == 0); */
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netDevice->ReceiveBuffer =
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osd_PageAlloc(netDevice->ReceiveBufferSize >> PAGE_SHIFT);
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if (!netDevice->ReceiveBuffer) {
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DPRINT_ERR(NETVSC,
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"unable to allocate receive buffer of size %d",
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netDevice->ReceiveBufferSize);
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ret = -1;
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goto Cleanup;
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}
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/* page-aligned buffer */
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/* ASSERT(((unsigned long)netDevice->ReceiveBuffer & (PAGE_SIZE - 1)) == */
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/* 0); */
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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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DPRINT_ERR(NETVSC,
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"unable to establish receive buffer's gpadl");
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goto Cleanup;
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}
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/* osd_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(struct 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(struct 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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DPRINT_ERR(NETVSC,
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"unable to send receive buffer's gpadl to netvsp");
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goto Cleanup;
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}
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osd_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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DPRINT_ERR(NETVSC, "Unable to complete receive buffer "
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"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(struct nvsp_1_receive_buffer_section), GFP_KERNEL);
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if (netDevice->ReceiveSections == NULL) {
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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(struct nvsp_1_receive_buffer_section));
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DPRINT_INFO(NETVSC, "Receive sections info (count %d, offset %d, "
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"endoffset %d, suballoc size %d, num suballocs %d)",
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netDevice->ReceiveSectionCount,
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netDevice->ReceiveSections[0].Offset,
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netDevice->ReceiveSections[0].EndOffset,
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netDevice->ReceiveSections[0].SubAllocationSize,
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netDevice->ReceiveSections[0].NumSubAllocations);
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/*
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* For 1st release, there should only be 1 section that represents the
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* entire receive buffer
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*/
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if (netDevice->ReceiveSectionCount != 1 ||
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netDevice->ReceiveSections->Offset != 0) {
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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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static int NetVscInitializeSendBufferWithNetVsp(struct hv_device *Device)
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{
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int ret = 0;
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struct netvsc_device *netDevice;
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struct 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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DPRINT_ERR(NETVSC, "unable to get net device..."
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"device being destroyed?");
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DPRINT_EXIT(NETVSC);
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return -1;
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}
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if (netDevice->SendBufferSize <= 0) {
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ret = -EINVAL;
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goto Cleanup;
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}
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/* page-size grandularity */
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/* ASSERT((netDevice->SendBufferSize & (PAGE_SIZE - 1)) == 0); */
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netDevice->SendBuffer =
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osd_PageAlloc(netDevice->SendBufferSize >> PAGE_SHIFT);
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if (!netDevice->SendBuffer) {
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DPRINT_ERR(NETVSC, "unable to allocate send buffer of size %d",
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netDevice->SendBufferSize);
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ret = -1;
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goto Cleanup;
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}
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/* page-aligned buffer */
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/* ASSERT(((unsigned long)netDevice->SendBuffer & (PAGE_SIZE - 1)) == 0); */
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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
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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->SendBuffer,
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netDevice->SendBufferSize,
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&netDevice->SendBufferGpadlHandle);
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if (ret != 0) {
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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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/* osd_WaitEventWait(ext->ChannelInitEvent); */
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/* Notify the NetVsp of the gpadl handle */
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DPRINT_INFO(NETVSC, "Sending NvspMessage1TypeSendSendBuffer...");
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initPacket = &netDevice->ChannelInitPacket;
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memset(initPacket, 0, sizeof(struct nvsp_message));
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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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/* Send the gpadl notification request */
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ret = Device->Driver->VmbusChannelInterface.SendPacket(Device,
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initPacket, sizeof(struct 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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DPRINT_ERR(NETVSC,
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"unable to send receive buffer's gpadl to netvsp");
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goto Cleanup;
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}
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osd_WaitEventWait(netDevice->ChannelInitEvent);
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/* Check the response */
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if (initPacket->Messages.Version1Messages.SendSendBufferComplete.Status != NvspStatusSuccess) {
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DPRINT_ERR(NETVSC, "Unable to complete send buffer "
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"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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}
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netDevice->SendSectionSize = initPacket->Messages.Version1Messages.SendSendBufferComplete.SectionSize;
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goto Exit;
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Cleanup:
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NetVscDestroySendBuffer(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 NetVscDestroyReceiveBuffer(struct netvsc_device *NetDevice)
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{
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struct nvsp_message *revokePacket;
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int ret = 0;
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DPRINT_ENTER(NETVSC);
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|
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/*
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* If we got a section count, it means we received a
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* SendReceiveBufferComplete msg (ie sent
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* NvspMessage1TypeSendReceiveBuffer msg) therefore, we need
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* to send a revoke msg here
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*/
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if (NetDevice->ReceiveSectionCount) {
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DPRINT_INFO(NETVSC,
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"Sending NvspMessage1TypeRevokeReceiveBuffer...");
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|
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/* Send the revoke receive buffer */
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revokePacket = &NetDevice->RevokePacket;
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memset(revokePacket, 0, sizeof(struct nvsp_message));
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revokePacket->Header.MessageType = NvspMessage1TypeRevokeReceiveBuffer;
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revokePacket->Messages.Version1Messages.RevokeReceiveBuffer.Id = NETVSC_RECEIVE_BUFFER_ID;
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|
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ret = NetDevice->Device->Driver->VmbusChannelInterface.SendPacket(
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NetDevice->Device,
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revokePacket,
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sizeof(struct nvsp_message),
|
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(unsigned long)revokePacket,
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VmbusPacketTypeDataInBand, 0);
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/*
|
|
* If we failed here, we might as well return and
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* have a leak rather than continue and a bugchk
|
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*/
|
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if (ret != 0) {
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DPRINT_ERR(NETVSC, "unable to send revoke receive "
|
|
"buffer to netvsp");
|
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DPRINT_EXIT(NETVSC);
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return -1;
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}
|
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}
|
|
|
|
/* Teardown the gpadl on the vsp end */
|
|
if (NetDevice->ReceiveBufferGpadlHandle) {
|
|
DPRINT_INFO(NETVSC, "Tearing down receive buffer's GPADL...");
|
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|
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ret = NetDevice->Device->Driver->VmbusChannelInterface.TeardownGpadl(
|
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NetDevice->Device,
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NetDevice->ReceiveBufferGpadlHandle);
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|
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/* If we failed here, we might as well return and have a leak rather than continue and a bugchk */
|
|
if (ret != 0) {
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DPRINT_ERR(NETVSC,
|
|
"unable to teardown receive buffer's gpadl");
|
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DPRINT_EXIT(NETVSC);
|
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return -1;
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}
|
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NetDevice->ReceiveBufferGpadlHandle = 0;
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}
|
|
|
|
if (NetDevice->ReceiveBuffer) {
|
|
DPRINT_INFO(NETVSC, "Freeing up receive buffer...");
|
|
|
|
/* Free up the receive buffer */
|
|
osd_PageFree(NetDevice->ReceiveBuffer,
|
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NetDevice->ReceiveBufferSize >> PAGE_SHIFT);
|
|
NetDevice->ReceiveBuffer = NULL;
|
|
}
|
|
|
|
if (NetDevice->ReceiveSections) {
|
|
NetDevice->ReceiveSectionCount = 0;
|
|
kfree(NetDevice->ReceiveSections);
|
|
NetDevice->ReceiveSections = NULL;
|
|
}
|
|
|
|
DPRINT_EXIT(NETVSC);
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|
|
return ret;
|
|
}
|
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|
|
static int NetVscDestroySendBuffer(struct netvsc_device *NetDevice)
|
|
{
|
|
struct 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(struct 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(struct 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 */
|
|
osd_PageFree(NetDevice->SendBuffer,
|
|
NetDevice->SendBufferSize >> PAGE_SHIFT);
|
|
NetDevice->SendBuffer = NULL;
|
|
}
|
|
|
|
DPRINT_EXIT(NETVSC);
|
|
|
|
return ret;
|
|
}
|
|
|
|
|
|
static int NetVscConnectToVsp(struct hv_device *Device)
|
|
{
|
|
int ret;
|
|
struct netvsc_device *netDevice;
|
|
struct 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(struct 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(struct nvsp_message),
|
|
(unsigned long)initPacket,
|
|
VmbusPacketTypeDataInBand,
|
|
VMBUS_DATA_PACKET_FLAG_COMPLETION_REQUESTED);
|
|
|
|
if (ret != 0) {
|
|
DPRINT_ERR(NETVSC, "unable to send NvspMessageTypeInit");
|
|
goto Cleanup;
|
|
}
|
|
|
|
osd_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(struct 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(struct 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
|
|
*/
|
|
/* osd_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);
|
|
}
|
|
|
|
/*
|
|
* NetVscOnDeviceAdd - Callback when the device belonging to this driver is added
|
|
*/
|
|
static int NetVscOnDeviceAdd(struct hv_device *Device, void *AdditionalInfo)
|
|
{
|
|
int ret = 0;
|
|
int i;
|
|
struct netvsc_device *netDevice;
|
|
struct hv_netvsc_packet *packet, *pos;
|
|
struct netvsc_driver *netDriver =
|
|
(struct netvsc_driver *)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;
|
|
|
|
INIT_LIST_HEAD(&netDevice->ReceivePacketList);
|
|
|
|
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) {
|
|
DPRINT_DBG(NETVSC, "unable to allocate netvsc pkts "
|
|
"for receive pool (wanted %d got %d)",
|
|
NETVSC_RECEIVE_PACKETLIST_COUNT, i);
|
|
break;
|
|
}
|
|
list_add_tail(&packet->ListEntry,
|
|
&netDevice->ReceivePacketList);
|
|
}
|
|
netDevice->ChannelInitEvent = osd_WaitEventCreate();
|
|
if (!netDevice->ChannelInitEvent) {
|
|
ret = -ENOMEM;
|
|
goto Cleanup;
|
|
}
|
|
|
|
/* 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) {
|
|
kfree(netDevice->ChannelInitEvent);
|
|
|
|
list_for_each_entry_safe(packet, pos,
|
|
&netDevice->ReceivePacketList,
|
|
ListEntry) {
|
|
list_del(&packet->ListEntry);
|
|
kfree(packet);
|
|
}
|
|
|
|
ReleaseOutboundNetDevice(Device);
|
|
ReleaseInboundNetDevice(Device);
|
|
|
|
FreeNetDevice(netDevice);
|
|
}
|
|
|
|
DPRINT_EXIT(NETVSC);
|
|
return ret;
|
|
}
|
|
|
|
/*
|
|
* NetVscOnDeviceRemove - Callback when the root bus device is removed
|
|
*/
|
|
static int NetVscOnDeviceRemove(struct hv_device *Device)
|
|
{
|
|
struct netvsc_device *netDevice;
|
|
struct hv_netvsc_packet *netvscPacket, *pos;
|
|
|
|
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 (atomic_read(&netDevice->NumOutstandingSends)) {
|
|
DPRINT_INFO(NETVSC, "waiting for %d requests to complete...",
|
|
atomic_read(&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 */
|
|
list_for_each_entry_safe(netvscPacket, pos,
|
|
&netDevice->ReceivePacketList, ListEntry) {
|
|
list_del(&netvscPacket->ListEntry);
|
|
kfree(netvscPacket);
|
|
}
|
|
|
|
kfree(netDevice->ChannelInitEvent);
|
|
FreeNetDevice(netDevice);
|
|
|
|
DPRINT_EXIT(NETVSC);
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* NetVscOnCleanup - Perform any cleanup when the driver is removed
|
|
*/
|
|
static void NetVscOnCleanup(struct hv_driver *drv)
|
|
{
|
|
DPRINT_ENTER(NETVSC);
|
|
DPRINT_EXIT(NETVSC);
|
|
}
|
|
|
|
static void NetVscOnSendCompletion(struct hv_device *Device,
|
|
struct vmpacket_descriptor *Packet)
|
|
{
|
|
struct netvsc_device *netDevice;
|
|
struct nvsp_message *nvspPacket;
|
|
struct hv_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 = (struct 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(struct nvsp_message));
|
|
osd_WaitEventSet(netDevice->ChannelInitEvent);
|
|
} else if (nvspPacket->Header.MessageType ==
|
|
NvspMessage1TypeSendRNDISPacketComplete) {
|
|
/* Get the send context */
|
|
nvscPacket = (struct hv_netvsc_packet *)(unsigned long)Packet->TransactionId;
|
|
/* ASSERT(nvscPacket); */
|
|
|
|
/* Notify the layer above us */
|
|
nvscPacket->Completion.Send.OnSendCompletion(nvscPacket->Completion.Send.SendCompletionContext);
|
|
|
|
atomic_dec(&netDevice->NumOutstandingSends);
|
|
} else {
|
|
DPRINT_ERR(NETVSC, "Unknown send completion packet type - "
|
|
"%d received!!", nvspPacket->Header.MessageType);
|
|
}
|
|
|
|
PutNetDevice(Device);
|
|
DPRINT_EXIT(NETVSC);
|
|
}
|
|
|
|
static int NetVscOnSend(struct hv_device *Device,
|
|
struct hv_netvsc_packet *Packet)
|
|
{
|
|
struct netvsc_device *netDevice;
|
|
int ret = 0;
|
|
|
|
struct 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) {
|
|
/* 0 is RMC_DATA; */
|
|
sendMessage.Messages.Version1Messages.SendRNDISPacket.ChannelType = 0;
|
|
} else {
|
|
/* 1 is RMC_CONTROL; */
|
|
sendMessage.Messages.Version1Messages.SendRNDISPacket.ChannelType = 1;
|
|
}
|
|
|
|
/* 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(struct nvsp_message),
|
|
(unsigned long)Packet);
|
|
} else {
|
|
ret = Device->Driver->VmbusChannelInterface.SendPacket(Device,
|
|
&sendMessage,
|
|
sizeof(struct 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);
|
|
|
|
atomic_inc(&netDevice->NumOutstandingSends);
|
|
PutNetDevice(Device);
|
|
|
|
DPRINT_EXIT(NETVSC);
|
|
return ret;
|
|
}
|
|
|
|
static void NetVscOnReceive(struct hv_device *Device,
|
|
struct vmpacket_descriptor *Packet)
|
|
{
|
|
struct netvsc_device *netDevice;
|
|
struct vmtransfer_page_packet_header *vmxferpagePacket;
|
|
struct nvsp_message *nvspPacket;
|
|
struct hv_netvsc_packet *netvscPacket = NULL;
|
|
unsigned long start;
|
|
unsigned long end, endVirtual;
|
|
/* struct netvsc_driver *netvscDriver; */
|
|
struct xferpage_packet *xferpagePacket = NULL;
|
|
int i, j;
|
|
int count = 0, bytesRemain = 0;
|
|
unsigned long flags;
|
|
LIST_HEAD(listHead);
|
|
|
|
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 = (struct 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 = (struct 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);
|
|
|
|
/*
|
|
* 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 (!list_empty(&netDevice->ReceivePacketList)) {
|
|
list_move_tail(netDevice->ReceivePacketList.next, &listHead);
|
|
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--) {
|
|
list_move_tail(listHead.next,
|
|
&netDevice->ReceivePacketList);
|
|
}
|
|
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 */
|
|
xferpagePacket = (struct xferpage_packet *)listHead.next;
|
|
list_del(&xferpagePacket->ListEntry);
|
|
|
|
/* This is how much we can satisfy */
|
|
xferpagePacket->Count = count - 1;
|
|
/* 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++) {
|
|
netvscPacket = (struct hv_netvsc_packet *)listHead.next;
|
|
list_del(&netvscPacket->ListEntry);
|
|
|
|
/* Initialize the netvsc packet */
|
|
netvscPacket->XferPagePacket = xferpagePacket;
|
|
netvscPacket->Completion.Recv.OnReceiveCompletion =
|
|
NetVscOnReceiveCompletion;
|
|
netvscPacket->Completion.Recv.ReceiveCompletionContext =
|
|
netvscPacket;
|
|
netvscPacket->Device = Device;
|
|
/* Save this so that we can send it back */
|
|
netvscPacket->Completion.Recv.ReceiveCompletionTid =
|
|
vmxferpagePacket->d.TransactionId;
|
|
|
|
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 = virt_to_phys((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 = virt_to_phys((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 =
|
|
virt_to_phys((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 */
|
|
((struct netvsc_driver *)Device->Driver)->OnReceiveCallback(Device, netvscPacket);
|
|
|
|
NetVscOnReceiveCompletion(netvscPacket->Completion.Recv.ReceiveCompletionContext);
|
|
}
|
|
|
|
/* ASSERT(list_empty(&listHead)); */
|
|
|
|
PutNetDevice(Device);
|
|
DPRINT_EXIT(NETVSC);
|
|
}
|
|
|
|
static void NetVscSendReceiveCompletion(struct hv_device *Device,
|
|
u64 TransactionId)
|
|
{
|
|
struct nvsp_message recvcompMessage;
|
|
int retries = 0;
|
|
int ret;
|
|
|
|
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(struct 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)
|
|
{
|
|
struct hv_netvsc_packet *packet = Context;
|
|
struct hv_device *device = (struct hv_device *)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;
|
|
list_add_tail(&packet->XferPagePacket->ListEntry,
|
|
&netDevice->ReceivePacketList);
|
|
|
|
}
|
|
|
|
/* Put the packet back */
|
|
list_add_tail(&packet->ListEntry, &netDevice->ReceivePacketList);
|
|
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);
|
|
}
|
|
|
|
static void NetVscOnChannelCallback(void *Context)
|
|
{
|
|
int ret;
|
|
struct hv_device *device = Context;
|
|
struct netvsc_device *netDevice;
|
|
u32 bytesRecvd;
|
|
u64 requestId;
|
|
unsigned char *packet;
|
|
struct vmpacket_descriptor *desc;
|
|
unsigned char *buffer;
|
|
int bufferlen = NETVSC_PACKET_SIZE;
|
|
|
|
|
|
DPRINT_ENTER(NETVSC);
|
|
|
|
/* ASSERT(device); */
|
|
|
|
packet = kzalloc(NETVSC_PACKET_SIZE * sizeof(unsigned char),
|
|
GFP_KERNEL);
|
|
if (!packet)
|
|
return;
|
|
buffer = packet;
|
|
|
|
netDevice = GetInboundNetDevice(device);
|
|
if (!netDevice) {
|
|
DPRINT_ERR(NETVSC, "net device (%p) shutting down..."
|
|
"ignoring inbound packets", netDevice);
|
|
DPRINT_EXIT(NETVSC);
|
|
goto out;
|
|
}
|
|
|
|
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 = (struct 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 > 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 == -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;
|
|
}
|
|
} while (1);
|
|
|
|
PutNetDevice(device);
|
|
DPRINT_EXIT(NETVSC);
|
|
out:
|
|
kfree(buffer);
|
|
return;
|
|
}
|