/*
* Copyright (c) 2009, Microsoft Corporation.
*
* This program is free software; you can redistribute it and/or modify it
* under the terms and conditions of the GNU General Public License,
* version 2, as published by the Free Software Foundation.
*
* This program is distributed in the hope it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
* more details.
*
* You should have received a copy of the GNU General Public License along with
* this program; if not, see <http://www.gnu.org/licenses/>.
*
* Authors:
* Haiyang Zhang <haiyangz@microsoft.com>
* Hank Janssen <hjanssen@microsoft.com>
*/
#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
#include <linux/kernel.h>
#include <linux/sched.h>
#include <linux/wait.h>
#include <linux/mm.h>
#include <linux/delay.h>
#include <linux/io.h>
#include <linux/slab.h>
#include <linux/netdevice.h>
#include <linux/if_ether.h>
#include <linux/vmalloc.h>
#include <linux/rtnetlink.h>
#include <linux/prefetch.h>
#include <asm/sync_bitops.h>
#include "hyperv_net.h"
/*
* Switch the data path from the synthetic interface to the VF
* interface.
*/
void netvsc_switch_datapath(struct net_device *ndev, bool vf)
{
struct net_device_context *net_device_ctx = netdev_priv(ndev);
struct hv_device *dev = net_device_ctx->device_ctx;
struct netvsc_device *nv_dev = rtnl_dereference(net_device_ctx->nvdev);
struct nvsp_message *init_pkt = &nv_dev->channel_init_pkt;
memset(init_pkt, 0, sizeof(struct nvsp_message));
init_pkt->hdr.msg_type = NVSP_MSG4_TYPE_SWITCH_DATA_PATH;
if (vf)
init_pkt->msg.v4_msg.active_dp.active_datapath =
NVSP_DATAPATH_VF;
else
init_pkt->msg.v4_msg.active_dp.active_datapath =
NVSP_DATAPATH_SYNTHETIC;
vmbus_sendpacket(dev->channel, init_pkt,
sizeof(struct nvsp_message),
(unsigned long)init_pkt,
VM_PKT_DATA_INBAND, 0);
}
static struct netvsc_device *alloc_net_device(void)
{
struct netvsc_device *net_device;
net_device = kzalloc(sizeof(struct netvsc_device), GFP_KERNEL);
if (!net_device)
return NULL;
init_waitqueue_head(&net_device->wait_drain);
net_device->destroy = false;
atomic_set(&net_device->open_cnt, 0);
net_device->max_pkt = RNDIS_MAX_PKT_DEFAULT;
net_device->pkt_align = RNDIS_PKT_ALIGN_DEFAULT;
init_completion(&net_device->channel_init_wait);
init_waitqueue_head(&net_device->subchan_open);
INIT_WORK(&net_device->subchan_work, rndis_set_subchannel);
return net_device;
}
static void free_netvsc_device(struct rcu_head *head)
{
struct netvsc_device *nvdev
= container_of(head, struct netvsc_device, rcu);
int i;
for (i = 0; i < VRSS_CHANNEL_MAX; i++)
vfree(nvdev->chan_table[