C++ (Cpp) virtqueue_detach_unused_buf Exemples

Exemple #1

Fichier : Device.c Projet : akxc/kvm-guest-drivers-windows

NTSTATUS
VIOSerialEvtDeviceD0Exit(
    IN  WDFDEVICE Device,
    IN  WDF_POWER_DEVICE_STATE TargetState
    )
{
    PPORTS_DEVICE pContext = GetPortsDevice(Device);
    PPORT_BUFFER buf;

    TraceEvents(TRACE_LEVEL_INFORMATION, DBG_PNP,"--> %s TargetState: %d\n",
        __FUNCTION__, TargetState);

    PAGED_CODE();

    while (buf = (PPORT_BUFFER)virtqueue_detach_unused_buf(pContext->c_ivq))
    {
        VIOSerialFreeBuffer(buf);
    }

    VIOSerialShutDownAllQueues(Device);

    TraceEvents(TRACE_LEVEL_INFORMATION, DBG_PNP, "<-- %s\n", __FUNCTION__);

    return STATUS_SUCCESS;
}

Exemple #2

Fichier : Port.c Projet : bob-long/kvm-guest-drivers-windows

NTSTATUS
VIOSerialPortEvtDeviceD0Exit(
    IN  WDFDEVICE Device,
    IN  WDF_POWER_DEVICE_STATE TargetState
    )
{
    PVIOSERIAL_PORT Port = RawPdoSerialPortGetData(Device)->port;
    PPORT_BUFFER buf;
    PSINGLE_LIST_ENTRY iter;

    TraceEvents(TRACE_LEVEL_INFORMATION, DBG_INIT, "--> %s TargetState: %d\n",
        __FUNCTION__, TargetState);

    Port->Removed = TRUE;

    VIOSerialDisableInterruptQueue(GetInQueue(Port));

    WdfSpinLockAcquire(Port->InBufLock);
    VIOSerialDiscardPortDataLocked(Port);
    Port->InBuf = NULL;
    WdfSpinLockRelease(Port->InBufLock);

    WdfSpinLockAcquire(Port->OutVqLock);
    VIOSerialReclaimConsumedBuffers(Port);
    WdfSpinLockRelease(Port->OutVqLock);

    while (buf = (PPORT_BUFFER)virtqueue_detach_unused_buf(GetInQueue(Port)))
    {
        VIOSerialFreeBuffer(buf);
    }

    iter = PopEntryList(&Port->WriteBuffersList);
    while (iter != NULL)
    {
        PWRITE_BUFFER_ENTRY entry = CONTAINING_RECORD(iter,
            WRITE_BUFFER_ENTRY, ListEntry);

        ExFreePoolWithTag(entry->Buffer, VIOSERIAL_DRIVER_MEMORY_TAG);
        ExFreePoolWithTag(entry, VIOSERIAL_DRIVER_MEMORY_TAG);

        iter = PopEntryList(&Port->WriteBuffersList);
    };

    TraceEvents(TRACE_LEVEL_INFORMATION, DBG_INIT, "<-- %s\n", __FUNCTION__);

    return STATUS_SUCCESS;
}

Exemple #3

Fichier : caif_virtio.c Projet : ReneNyffenegger/linux

/* Disable the CAIF interface and free the memory-pool */
static int cfv_netdev_close(struct net_device *netdev)
{
	struct cfv_info *cfv = netdev_priv(netdev);
	unsigned long flags;
	struct buf_info *buf_info;

	/* Disable interrupts, queues and NAPI polling */
	netif_carrier_off(netdev);
	virtqueue_disable_cb(cfv->vq_tx);
	vringh_notify_disable_kern(cfv->vr_rx);
	napi_disable(&cfv->napi);

	/* Release any TX buffers on both used and avilable rings */
	cfv_release_used_buf(cfv->vq_tx);
	spin_lock_irqsave(&cfv->tx_lock, flags);
	while ((buf_info = virtqueue_detach_unused_buf(cfv->vq_tx)))
		free_buf_info(cfv, buf_info);
	spin_unlock_irqrestore(&cfv->tx_lock, flags);

	/* Release all dma allocated memory and destroy the pool */
	cfv_destroy_genpool(cfv);
	return 0;
}