/*
* Net VSC on device remove
*/
int
hv_nv_on_device_remove(struct hv_device *device, boolean_t destroy_channel)
{
hn_softc_t *sc = device_get_softc(device->device);
netvsc_dev *net_dev = sc->net_dev;;
/* Stop outbound traffic ie sends and receives completions */
net_dev->destroy = TRUE;
hv_nv_disconnect_from_vsp(net_dev);
/* At this point, no one should be accessing net_dev except in here */
/* Now, we can close the channel safely */
if (!destroy_channel) {
device->channel->state =
HV_CHANNEL_CLOSING_NONDESTRUCTIVE_STATE;
}
free(device->channel->hv_chan_rdbuf, M_NETVSC);
hv_vmbus_channel_close(device->channel);
sema_destroy(&net_dev->channel_init_sema);
free(net_dev, M_NETVSC);
return (0);
}
/*
* Net VSC on device add
*
* Callback when the device belonging to this driver is added
*/
netvsc_dev *
hv_nv_on_device_add(struct hv_device *device, void *additional_info)
{
struct hv_vmbus_channel *chan = device->channel;
netvsc_dev *net_dev;
int ret = 0;
net_dev = hv_nv_alloc_net_device(device);
if (net_dev == NULL)
return NULL;
/* Initialize the NetVSC channel extension */
sema_init(&net_dev->channel_init_sema, 0, "netdev_sema");
chan->hv_chan_rdbuf = malloc(NETVSC_PACKET_SIZE, M_NETVSC, M_WAITOK);
/*
* Open the channel
*/
ret = hv_vmbus_channel_open(chan,
NETVSC_DEVICE_RING_BUFFER_SIZE, NETVSC_DEVICE_RING_BUFFER_SIZE,
NULL, 0, hv_nv_on_channel_callback, chan);
if (ret != 0) {
free(chan->hv_chan_rdbuf, M_NETVSC);
goto cleanup;
}
/*
* Connect with the NetVsp
*/
ret = hv_nv_connect_to_vsp(device);
if (ret != 0)
goto close;
return (net_dev);
close:
/* Now, we can close the channel safely */
free(chan->hv_chan_rdbuf, M_NETVSC);
hv_vmbus_channel_close(chan);
cleanup:
/*
* Free the packet buffers on the netvsc device packet queue.
* Release other resources.
*/
if (net_dev) {
sema_destroy(&net_dev->channel_init_sema);
free(net_dev, M_NETVSC);
}
return (NULL);
}
static int
hv_kvp_detach(device_t dev)
{
struct hv_device* hv_dev;
#ifdef DEBUG
printf("hv_kvp_detach: called\n");
#endif
hv_dev = vmbus_get_devctx(dev);
if (kvp_hv_dev != hv_dev)
printf("hv_kvp_detach: Closing an INVALID kvp device\n");
hv_vmbus_channel_close(hv_dev->channel);
kvp_hv_dev = NULL;
return (0);
}
static int
hv_util_detach(device_t dev)
{
struct hv_device* hv_dev;
struct hv_vmbus_service* service;
size_t receive_buffer_offset;
hv_dev = vmbus_get_devctx(dev);
hv_vmbus_channel_close(hv_dev->channel);
service = device_get_softc(dev);
receive_buffer_offset = service - &service_table[0];
if (service->work_queue != NULL)
hv_work_queue_close(service->work_queue);
free(receive_buffer[receive_buffer_offset], M_DEVBUF);
receive_buffer[receive_buffer_offset] = NULL;
return (0);
}