/*
 * Copyright 2013, Jérôme Duval, korli@users.berlios.de.
 * Distributed under the terms of the MIT License.
 */
#ifndef VIRTIO_RNG_PRIVATE_H
#define VIRTIO_RNG_PRIVATE_H


#include <condition_variable.h>
#include <dpc.h>
#include <lock.h>
#include "random.h"
#include <virtio.h>


//#define TRACE_VIRTIO_RNG
#ifdef TRACE_VIRTIO_RNG
#       define TRACE(x...) dprintf("virtio_rng: " x)
#else
#       define TRACE(x...) ;
#endif
#define ERROR(x...)                     dprintf("\33[33mvirtio_rng:\33[0m " x)
#define CALLED()                        TRACE("CALLED %s\n", __PRETTY_FUNCTION__)


extern device_manager_info* gDeviceManager;
extern random_for_controller_interface *gRandom;
extern dpc_module_info *gDPC;


class VirtioRNGDevice {
public:
                                                                VirtioRNGDevice(device_node* node);
                                                                ~VirtioRNGDevice();

                        status_t                        InitCheck();

protected:
        static  int32                           HandleTimerHook(struct timer* timer);
        static  void                            HandleDPC(void* arg);

private:
        static  void                            _RequestCallback(void* driverCookie,
                                                                        void *cookie);
                        void                            _RequestInterrupt();
                        status_t                        _Enqueue();

                        virtio_device_interface* fVirtio;
                        virtio_device*          fVirtioDevice;

                        status_t                        fStatus;
                        uint64                          fFeatures;
                        ::virtio_queue          fVirtioQueue;

                        spinlock                        fInterruptLock;
                        ConditionVariable       fInterruptCondition;
                        bool                            fExpectsInterrupt;

                        timer                           fTimer;
                        void*                           fDPCHandle;
};


#endif // VIRTIO_RNG_PRIVATE_H