/*
* Net VSC on channel callback
*/
static void
hv_nv_on_channel_callback(void *xchan)
{
struct hv_vmbus_channel *chan = xchan;
struct hv_device *device = chan->device;
netvsc_dev *net_dev;
device_t dev = device->device;
uint32_t bytes_rxed;
uint64_t request_id;
hv_vm_packet_descriptor *desc;
uint8_t *buffer;
int bufferlen = NETVSC_PACKET_SIZE;
int ret = 0;
net_dev = hv_nv_get_inbound_net_device(device);
if (net_dev == NULL)
return;
buffer = chan->hv_chan_rdbuf;
do {
ret = hv_vmbus_channel_recv_packet_raw(chan,
buffer, bufferlen, &bytes_rxed, &request_id);
if (ret == 0) {
if (bytes_rxed > 0) {
desc = (hv_vm_packet_descriptor *)buffer;
switch (desc->type) {
case HV_VMBUS_PACKET_TYPE_COMPLETION:
hv_nv_on_send_completion(net_dev, device, desc);
break;
case HV_VMBUS_PACKET_TYPE_DATA_USING_TRANSFER_PAGES:
hv_nv_on_receive(net_dev, device, chan, desc);
break;
default:
device_printf(dev,
"hv_cb recv unknow type %d "
" packet\n", desc->type);
break;
}
} else {
break;
}
} else if (ret == ENOBUFS) {
/* Handle large packet */
if (bufferlen > NETVSC_PACKET_SIZE) {
free(buffer, M_NETVSC);
buffer = NULL;
}
/* alloc new buffer */
buffer = malloc(bytes_rxed, M_NETVSC, M_NOWAIT);
if (buffer == NULL) {
device_printf(dev,
"hv_cb malloc buffer failed, len=%u\n",
bytes_rxed);
bufferlen = 0;
break;
}
bufferlen = bytes_rxed;
}
} while (1);
if (bufferlen > NETVSC_PACKET_SIZE)
free(buffer, M_NETVSC);
hv_rf_channel_rollup(chan);
}
/*
* Net VSC on channel callback
*/
static void
hv_nv_on_channel_callback(struct vmbus_channel *chan, void *xrxr)
{
struct hn_rx_ring *rxr = xrxr;
struct hn_softc *sc = rxr->hn_ifp->if_softc;
netvsc_dev *net_dev;
void *buffer;
int bufferlen = NETVSC_PACKET_SIZE;
net_dev = hv_nv_get_inbound_net_device(sc);
if (net_dev == NULL)
return;
buffer = rxr->hn_rdbuf;
do {
struct vmbus_chanpkt_hdr *pkt = buffer;
uint32_t bytes_rxed;
int ret;
bytes_rxed = bufferlen;
ret = vmbus_chan_recv_pkt(chan, pkt, &bytes_rxed);
if (ret == 0) {
if (bytes_rxed > 0) {
switch (pkt->cph_type) {
case VMBUS_CHANPKT_TYPE_COMP:
hv_nv_on_send_completion(net_dev, chan,
pkt);
break;
case VMBUS_CHANPKT_TYPE_RXBUF:
hv_nv_on_receive(net_dev, rxr, chan, pkt);
break;
case VMBUS_CHANPKT_TYPE_INBAND:
hv_nv_send_table(sc, pkt);
break;
default:
if_printf(rxr->hn_ifp,
"unknown chan pkt %u\n",
pkt->cph_type);
break;
}
}
} else if (ret == ENOBUFS) {
/* Handle large packet */
if (bufferlen > NETVSC_PACKET_SIZE) {
free(buffer, M_NETVSC);
buffer = NULL;
}
/* alloc new buffer */
buffer = malloc(bytes_rxed, M_NETVSC, M_NOWAIT);
if (buffer == NULL) {
if_printf(rxr->hn_ifp,
"hv_cb malloc buffer failed, len=%u\n",
bytes_rxed);
bufferlen = 0;
break;
}
bufferlen = bytes_rxed;
} else {
/* No more packets */
break;
}
} while (1);
if (bufferlen > NETVSC_PACKET_SIZE)
free(buffer, M_NETVSC);
hv_rf_channel_rollup(rxr, rxr->hn_txr);
}