IODMAEventSource.h [plain text]
#ifndef _IOKIT_IODMAEVENTSOURCE_H
#define _IOKIT_IODMAEVENTSOURCE_H
#include <IOKit/IOService.h>
#include <IOKit/IODMACommand.h>
#include <IOKit/IODMAController.h>
#include <IOKit/IOEventSource.h>
class IODMAController;
class IODMAEventSource : public IOEventSource
{
OSDeclareDefaultStructors(IODMAEventSource);
friend class IODMAController;
public:
typedef void (*Action)(OSObject *owner, IODMAEventSource *dmaES, IODMACommand *dmaCommand, IOReturn status, IOByteCount actualByteCount);
#define IODMAEventAction IODMAEventSource::Action
protected:
virtual void completeDMACommand(IODMACommand *dmaCommand);
virtual void notifyDMACommand(IODMACommand *dmaCommand, IOReturn status, IOByteCount actualByteCount);
public:
static IODMAEventSource *dmaEventSource(OSObject *owner,
IOService *provider,
Action completion = 0,
Action notification = 0,
UInt32 dmaIndex = 0);
virtual IOReturn startDMACommand(IODMACommand *dmaCommand, IODirection direction, IOByteCount byteCount = 0, IOByteCount byteOffset = 0);
virtual IOReturn stopDMACommand(bool flush = false, uint64_t timeout = UINT64_MAX);
virtual IOReturn queryDMACommand(IODMACommand **dmaCommand, IOByteCount *transferCount, bool waitForIdle = false);
virtual IOByteCount getFIFODepth();
private:
IOService *dmaProvider;
IODMAController *dmaController;
UInt32 dmaIndex;
queue_head_t dmaCommandsCompleted;
IOSimpleLock *dmaCommandsCompletedLock;
Action dmaCompletionAction;
Action dmaNotificationAction;
bool dmaSynchBusy;
virtual bool init(OSObject *owner,
IOService *provider,
Action completion = 0,
Action notification = 0,
UInt32 dmaIndex = 0);
virtual bool checkForWork(void);
};
#endif