static inline void netvsc_receive_inband(struct hv_device *hdev,
struct netvsc_device *nvdev,
struct nvsp_message *nvmsg)
{
switch (nvmsg->hdr.msg_type) {
case NVSP_MSG5_TYPE_SEND_INDIRECTION_TABLE:
netvsc_send_table(hdev, nvmsg);
break;
case NVSP_MSG4_TYPE_SEND_VF_ASSOCIATION:
netvsc_send_vf(nvdev, nvmsg);
break;
}
}
void netvsc_channel_cb(void *context)
{
int ret;
struct vmbus_channel *channel = (struct vmbus_channel *)context;
struct hv_device *device;
struct netvsc_device *net_device;
u32 bytes_recvd;
u64 request_id;
struct vmpacket_descriptor *desc;
unsigned char *buffer;
int bufferlen = NETVSC_PACKET_SIZE;
struct net_device *ndev;
if (channel->primary_channel != NULL)
device = channel->primary_channel->device_obj;
else
device = channel->device_obj;
net_device = get_inbound_net_device(device);
if (!net_device)
return;
ndev = net_device->ndev;
buffer = get_per_channel_state(channel);
do {
ret = vmbus_recvpacket_raw(channel, buffer, bufferlen,
&bytes_recvd, &request_id);
if (ret == 0) {
if (bytes_recvd > 0) {
desc = (struct vmpacket_descriptor *)buffer;
switch (desc->type) {
case VM_PKT_COMP:
netvsc_send_completion(net_device,
device, desc);
break;
case VM_PKT_DATA_USING_XFER_PAGES:
netvsc_receive(net_device, channel,
device, desc);
break;
case VM_PKT_DATA_INBAND:
netvsc_send_table(device, desc);
break;
default:
netdev_err(ndev,
"unhandled packet type %d, "
"tid %llx len %d\n",
desc->type, request_id,
bytes_recvd);
break;
}
} else {
/*
* We are done for this pass.
*/
break;
}
} else if (ret == -ENOBUFS) {
if (bufferlen > NETVSC_PACKET_SIZE)
kfree(buffer);
/* Handle large packet */
buffer = kmalloc(bytes_recvd, GFP_ATOMIC);
if (buffer == NULL) {
/* Try again next time around */
netdev_err(ndev,
"unable to allocate buffer of size "
"(%d)!!\n", bytes_recvd);
break;
}
bufferlen = bytes_recvd;
}
} while (1);
if (bufferlen > NETVSC_PACKET_SIZE)
kfree(buffer);
return;
}
