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/**
*
* @file xaxidma.h
* @addtogroup axidma_v9_0
* @{
* @details
*
* This is the driver API for the AXI DMA engine.
*
* For a full description of DMA features, please see the hardware spec. This
* driver supports the following features:
*
*   - Scatter-Gather DMA (SGDMA)
*   - Simple DMA
*   - Interrupts
*   - Programmable interrupt coalescing for SGDMA
*   - APIs to manage Buffer Descriptors (BD) movement to and from the SGDMA
*     engine
*
* <b>Simple DMA</b>
*
* Simple DMA allows the application to define a single transaction between DMA
* and Device. It has two channels: one from the DMA to Device and the other
* from Device to DMA. Application has to set the buffer address and
* length fields to initiate the transfer in respective channel.
*
* <b>Transactions</b>
*
* The object used to describe a transaction is referred to as a Buffer
* Descriptor (BD). Buffer descriptors are allocated in the user application.
* The user application needs to set buffer address, transfer length, and
* control information for this transfer. The control information includes
* SOF and EOF. Definition of those masks are in xaxidma_hw.h
*
* <b>Scatter-Gather DMA</b>
*
* SGDMA allows the application to define a list of transactions in memory which
* the hardware will process without further application intervention. During
* this time, the application is free to continue adding more work to keep the
* Hardware busy.
*
* User can check for the completion of transactions through polling the
* hardware, or interrupts.
*
* SGDMA processes whole packets. A packet is defined as a series of
* data bytes that represent a message. SGDMA allows a packet of data to be
* broken up into one or more transactions. For example, take an Ethernet IP
* packet which consists of a 14 byte header followed by a 1 or more bytes of
* payload. With SGDMA, the application may point a BD to the header and another
* BD to the payload, then transfer them as a single message. This strategy can
* make a TCP/IP stack more efficient by allowing it to keep packet header and
* data in different memory regions instead of assembling packets into
* contiguous blocks of memory.
*
* <b>BD Ring Management</b>
*
* BD rings are shared by the software and the hardware.
*
* The hardware expects BDs to be setup as a linked list. The DMA hardware walks
* through the list by following the next pointer field of a completed BD.
* The hardware stops processing when the just completed BD is the same as the
* BD specified in the Tail Ptr register in the hardware.
*
* The last BD in the ring is linked to the first BD in the ring.
*
* All BD management are done inside the driver. The user application should not
* directly modify the BD fields. Modifications to the BD fields should always
* go through the specific API functions.
*
* Within the ring, the driver maintains four groups of BDs. Each group consists
* of 0 or more adjacent BDs:
*
*   - Free: The BDs that can be allocated by the application with
*     XAxiDma_BdRingAlloc().
*
*   - Pre-process: The BDs that have been allocated with
*     XAxiDma_BdRingAlloc(). These BDs are under application control. The
*     application modifies these BDs through driver API to prepare them
*     for DMA transactions.
*
*   - Hardware: The BDs that have been enqueued to hardware with
*     XAxiDma_BdRingToHw(). These BDs are under hardware control and may be in a
*     state of awaiting hardware processing, in process, or processed by
*     hardware. It is considered an error for the application to change BDs
*     while they are in this group. Doing so can cause data corruption and lead
*     to system instability.
*
*   - Post-process: The BDs that have been processed by hardware and have
*     been extracted from the Hardware group with XAxiDma_BdRingFromHw().
*     These BDs are under application control. The application can check the
*     transfer status of these BDs. The application use XAxiDma_BdRingFree()
*     to put them into the Free group.
*
* BDs are expected to transition in the following way for continuous
* DMA transfers:
* <pre>
*
*         XAxiDma_BdRingAlloc()                   XAxiDma_BdRingToHw()
*   Free ------------------------> Pre-process ----------------------> Hardware
*                                                                      |
*    /|\                                                               |
*     |   XAxiDma_BdRingFree()                  XAxiDma_BdRingFromHw() |
*     +--------------------------- Post-process <----------------------+
*
* </pre>
*
* When a DMA transfer is to be cancelled before enqueuing to hardware,
* application can return the requested BDs to the Free group using
* XAxiDma_BdRingUnAlloc(), as shown below:
* <pre>
*
*         XAxiDma_BdRingUnAlloc()
*   Free <----------------------- Pre-process
*
* </pre>
*
* The API provides functions for BD list traversal:
* - XAxiDma_BdRingNext()
* - XAxiDma_BdRingPrev()
*
* These functions should be used with care as they do not understand where
* one group ends and another begins.
*
* <b>SGDMA Descriptor Ring Creation</b>
*
* BD ring is created using XAxiDma_BdRingCreate(). The memory for the BD ring
* is allocated by the application, and it has to be contiguous. Physical
* address is required to setup the BD ring.
*
* The applicaiton can use XAxiDma_BdRingMemCalc() to find out the amount of
* memory needed for a certain number of BDs. XAxiDma_BdRingCntCalc() can be
* used to find out how many BDs can be allocated for certain amount of memory.
*
* A helper function, XAxiDma_BdRingClone(), can speed up the BD ring setup if
* the BDs have same types of controls, for example, SOF and EOF. After
* using the XAxiDma_BdRingClone(), the application only needs to setup the
* buffer address and transfer length. Note that certain BDs in one packet,
* for example, the first BD and the last BD, may need to setup special
* control information.
*
* <b>Descriptor Ring State Machine</b>
*
* There are two states of the BD ring:
*
*   - HALTED (H), where hardware is not running
*
*   - NOT HALTED (NH), where hardware is running
*
* The following diagram shows the state transition for the DMA engine:
*
* <pre>
*   _____ XAxiDma_StartBdRingHw(), or XAxiDma_BdRingStart(),   ______
*   |   |               or XAxiDma_Resume()                    |    |
*   | H |----------------------------------------------------->| NH |
*   |   |<-----------------------------------------------------|    |
*   -----   XAxiDma_Pause() or XAxiDma_Reset()                 ------
* </pre>
*
* <b>Interrupt Coalescing</b>
*
* SGDMA provides control over the frequency of interrupts through interrupt
* coalescing. The DMA engine provides two ways to tune the interrupt
* coalescing:
*
* - The packet threshold counter. Interrupt will fire once the
*   programmable number of packets have been processed by the engine.
*
* - The packet delay timer counter. Interrupt will fire once the
*   programmable amount of time has passed after processing the last packet,
*   and no new packets to process. Note that the interrupt will only fire if
*   at least one packet has been processed.
*
* <b> Interrupt </b>
*
* Interrupts are handled by the user application. Each DMA channel has its own
* interrupt ID. The driver provides APIs to enable/disable interrupt,
* and tune the interrupt frequency regarding to packet processing frequency.
*
* <b> Software Initialization </b>
*
*
* To use the Simple mode DMA engine for transfers, the following setup is
* required:
*
* - DMA Initialization using XAxiDma_CfgInitialize() function. This step
*   initializes a driver instance for the given DMA engine and resets the
*   engine.
*
* - Enable interrupts if chosen to use interrupt mode. The application is
*   responsible for setting up the interrupt system, which includes providing
*   and connecting interrupt handlers and call back functions, before
*   enabling the interrupts.
*
* - Set the buffer address and length field in respective channels to start
*   the DMA transfer
*
* To use the SG mode DMA engine for transfers, the following setup are
* required:
*
* - DMA Initialization using XAxiDma_CfgInitialize() function. This step
*   initializes a driver instance for the given DMA engine and resets the
*   engine.
*
* - BD Ring creation. A BD ring is needed per DMA channel and can be built by
*   calling XAxiDma_BdRingCreate().
*
* - Enable interrupts if chose to use interrupt mode. The application is
*   responsible for setting up the interrupt system, which includes providing
*   and connecting interrupt handlers and call back functions, before
*   enabling the interrupts.
*
* - Start a DMA transfer: Call XAxiDma_BdRingStart() to start a transfer for
*   the first time or after a reset, and XAxiDma_BdRingToHw() if the channel
*   is already started. Calling XAxiDma_BdRingToHw() when a DMA channel is not
*   running will not put the BDs to the hardware, and the BDs will be processed
*   later when the DMA channel is started through XAxiDma_BdRingStart().
*
* <b> How to start DMA transactions </b>
*
* The user application uses XAxiDma_BdRingToHw() to submit BDs to the hardware
* to start DMA transfers.
*
* For both channels, if the DMA engine is currently stopped (using
* XAxiDma_Pause()), the newly added BDs will be accepted but not processed
* until the DMA engine is started, using XAxiDma_BdRingStart(), or resumed,
* using XAxiDma_Resume().
*
* <b> Software Post-Processing on completed DMA transactions </b>
*
* If the interrupt system has been set up and the interrupts are enabled,
* a DMA channels notifies the software about the completion of a transfer
* through interrupts. Otherwise, the user application can poll for
* completions of the BDs, using XAxiDma_BdRingFromHw() or
* XAxiDma_BdHwCompleted().
*
* - Once BDs are finished by a channel, the application first needs to fetch
*   them from the channel using XAxiDma_BdRingFromHw().
*
* - On the TX side, the application now could free the data buffers attached to
*   those BDs as the data in the buffers has been transmitted.
*
* - On the RX side, the application now could use the received data in the
*	buffers attached to those BDs.
*
* - For both channels, completed BDs need to be put back to the Free group
*   using XAxiDma_BdRingFree(), so they can be used for future transactions.
*
* - On the RX side, it is the application's responsibility to have BDs ready
*   to receive data at any time. Otherwise, the RX channel refuses to
*   accept any data if it has no RX BDs.
*
* <b> Examples </b>
*
* We provide five examples to show how to use the driver API:
* - One for SG interrupt mode (xaxidma_example_sg_intr.c), multiple BD/packets transfer
* - One for SG polling mode (xaxidma_example_sg_poll.c), single BD transfer.
* - One for SG polling mode (xaxidma_poll_multi_pkts.c), multiple BD/packets transfer
* - One for simple polling mode (xaxidma_example_simple_poll.c)
* - One for simple Interrupt mode (xaxidma_example_simple_intr.c)
*
* <b> Address Translation </b>
*
* All buffer addresses and BD addresses for the hardware are physical
* addresses. The user application is responsible to provide physical buffer
* address for the BD upon BD ring creation. The user application accesses BD
* through its virtual addess. The driver maintains the address translation
* between the physical and virtual address for BDs.
*
* <b> Cache Coherency </b>
*
* This driver expects all application buffers attached to BDs to be in cache
* coherent memory. If cache is used in the system, buffers for transmit MUST
* be flushed from the cache before passing the associated BD to this driver.
* Buffers for receive MUST be invalidated before accessing the data.
*
* <b> Alignment </b>
*
* For BDs:
*
* Minimum alignment is defined by the constant XAXIDMA_BD_MINIMUM_ALIGNMENT.
* This is the smallest alignment allowed by both hardware and software for them
* to properly work.
*
* If the descriptor ring is to be placed in cached memory, alignment also MUST
* be at least the processor's cache-line size. Otherwise, system instability
* occurs. For alignment larger than the cache line size, multiple cache line
* size alignment is required.
*
* Aside from the initial creation of the descriptor ring (see
* XAxiDma_BdRingCreate()), there are no other run-time checks for proper
* alignment of BDs.
*
* For application data buffers:
*
* Application data buffers may reside on any alignment if DRE is built into the
* hardware. Otherwise, application data buffer must be word-aligned. The word
* is defined by XPAR_AXIDMA_0_M_AXIS_MM2S_TDATA_WIDTH for transmit and
* XPAR_AXIDMA_0_S_AXIS_S2MM_TDATA_WIDTH for receive.
*
* For scatter gather transfers that have more than one BDs in the chain of BDs,
* Each BD transfer length must be multiple of word too. Otherwise, internal
* error happens in the hardware.
*
* <b> Error Handling </b>
*
* The DMA engine will halt on all error conditions. It requires the software
* to do a reset before it can start process new transfer requests.
*
* <b> Restart After Stopping </b>
*
* After the DMA engine has been stopped (through reset or reset after an error)
* the software keeps track of the current BD pointer when reset happens, and
* processing of BDs can be resumed through XAxiDma_BdRingStart().
*
* <b> Limitations </b>
*
* This driver does not have any mechanisms for mutual exclusion. It is up to
* the application to provide this protection.
*
* <b> Hardware Defaults & Exclusive Use </b>
*
* After the initialization or reset, the DMA engine is in the following
* default mode:
* - All interrupts are disabled.
*
* - Interrupt coalescing counter is 1.
*
* - The DMA engine is not running (halted). Each DMA channel is started
*   separately, using XAxiDma_StartBdRingHw() if no BDs are setup for transfer
*   yet, or XAxiDma_BdRingStart() otherwise.
*
* The driver has exclusive use of the registers and BDs. All accesses to the
* registers and BDs should go through the driver interface.
*
* <b> Debug Print </b>
*
* To see the debug print for the driver, please put "-DDEBUG" as the extra
* compiler flags in software platform settings. Also comment out the line in
* xdebug.h: "#undef DEBUG".
*
* <b>Changes From v1.00a</b>
*
* . We have changes return type for XAxiDma_BdSetBufAddr() from void to int
* . We added XAxiDma_LookupConfig() so that user does not need to look for the
* hardware settings anymore.
*
* <pre>
* MODIFICATION HISTORY:
*
* Ver   Who  Date     Changes
* ----- ---- -------- -------------------------------------------------------
* 1.00a jz   05/18/10 First release
* 2.00a jz   08/10/10 Second release, added in xaxidma_g.c, xaxidma_sinit.c,
*                     updated tcl file, added xaxidma_porting_guide.h
* 3.00a jz   11/22/10 Support IP core parameters change
* 4.00a rkv  02/22/11 Added support for simple DMA mode
*		      New API added for simple DMA mode are
*			- XAxiDma_Busy
*			- XAxiDma_SimpleTransfer
*		      New Macros added for simple DMA mode are
* 			- XAxiDma_HasSg
* 			- XAxiDma_IntrEnable
* 			- XAxiDma_IntrGetEnabled
* 			- XAxiDma_IntrDisable
* 			- XAxiDma_IntrGetIrq
* 			- XAxiDma_IntrAckIrq
* 5.00a srt  08/25/11  Added support for memory barrier and modified
*			Cache Macros to have a common API for Microblaze
*			and Zynq.
* 6.00a srt  01/24/12 Added support for Multi-Channel DMA mode.
*		      - Changed APIs:
*			* XAxiDma_GetRxRing(InstancePtr, RingIndex)
*			* XAxiDma_Start(XAxiDma * InstancePtr, int RingIndex)
*			* XAxiDma_Started(XAxiDma * InstancePtr, int RingIndex)
*			* XAxiDma_Pause(XAxiDma * InstancePtr, int RingIndex)
*			* XAxiDma_Resume(XAxiDma * InstancePtr, int RingIndex)
*			* XAxiDma_SimpleTransfer(XAxiDma *InstancePtr,
*        					u32 BuffAddr, u32 Length,
*						int Direction, int RingIndex)
*			* XAxiDma_StartBdRingHw(XAxiDma_BdRing * RingPtr,
*					int RingIndex)
*			* XAxiDma_BdRingStart(XAxiDma_BdRing * RingPtr,
*						 int RingIndex)
*			* XAxiDma_BdRingToHw(XAxiDma_BdRing * RingPtr,
*        			int NumBd, XAxiDma_Bd * BdSetPtr, int RingIndex)
*			* XAxiDma_BdRingDumpRegs(XAxiDma_BdRing * RingPtr,
*						 int RingIndex)
*			* XAxiDma_BdRingSnapShotCurrBd(XAxiDma_BdRing * RingPtr,
*						 int RingIndex)
*			* XAxiDma_BdSetLength(XAxiDma_Bd *BdPtr,
*					u32 LenBytes, u32 LengthMask)
*       		* XAxiDma_BdGetActualLength(BdPtr, LengthMask)
*			* XAxiDma_BdGetLength(BdPtr, LengthMask)
*		       - New APIs
*			* XAxiDma_SelectKeyHole(XAxiDma *InstancePtr,
*						int Direction, int Select)
*			* XAxiDma_UpdateBdRingCDesc(XAxiDma_BdRing * RingPtr,
*						int RingIndex)
* 7.00a srt  06/18/12  All the APIs changed in v6_00_a are reverted back for
*		       backward compatibility.
*			- New API:
*			  XAxiDma_GetRxIndexRing(InstancePtr, RingIndex)
* 7.01a srt  10/26/12  - Fixed issue with driver as it fails with IP version
*		         < 6.00a as the parameter C_NUM_*_CHANNELS is not
*			 applicable.
*		       - Changed the logic of MCDMA BD fields Set APIs, to
*			 clear the field first and then set it.
* 7.02a srt  01/23/13  Replaced *_TDATA_WIDTH parameters to *_DATA_WIDTH
*		       (CR 691867)
*		       Updated DDR base address for IPI designs (CR 703656).
* 8.0   adk  19/12/13  Updated as per the New Tcl API's
*	srt  01/29/14  Added support for Micro DMA Mode and cyclic mode of
*		       operations.
*		      - New APIs:
*			* XAxiDma_SelectCyclicMode(XAxiDma *InstancePtr,
*						int Direction, int Select)
 *			* XAxiDma_BdSetBufAddrMicroMode(XAxiDma_Bd*, u32)
* 8.1   adk  20/01/15  Added support for peripheral test. Created the self
*		       test example to include it on peripheral test's(CR#823144).
* 8.1   adk  29/01/15  Added the sefltest api (XAxiDma_Selftest) to the driver source files
* 		      (xaxidma_selftest.c) and called this from the selftest example
* 9.0 	adk  27/07/15  Added support for 64-bit Addressing.
* 9.0   adk  19/08/15  Fixed CR#873125 DMA SG Mode example tests are failing on
*		       HW in 2015.3.
*
* </pre>
*
******************************************************************************/
 
#ifndef XAXIDMA_H_   /* prevent circular inclusions */
#define XAXIDMA_H_
 
#ifdef __cplusplus
extern "C" {
#endif
 
/***************************** Include Files *********************************/
#include "xaxidma_bdring.h"
#ifdef __MICROBLAZE__
#include "xenv.h"
#else
#include <string.h>
#include "xil_cache.h"
#endif
 
/************************** Constant Definitions *****************************/
 
 
/**************************** Type Definitions *******************************/
 
/**
 * The XAxiDma driver instance data. An instance must be allocated for each DMA
 * engine in use.
 */
typedef struct XAxiDma {
	u32 RegBase;		/* Virtual base address of DMA engine */
 
	int HasMm2S;		/* Has transmit channel */
	int HasS2Mm;		/* Has receive channel */
	int Initialized;	/* Driver has been initialized */
	int HasSg;
 
	XAxiDma_BdRing TxBdRing;     /* BD container management for TX channel */
	XAxiDma_BdRing RxBdRing[16]; /* BD container management for RX channel */
	int TxNumChannels;
	int RxNumChannels;
	int MicroDmaMode;
	int AddrWidth;		  /**< Address Width */
} XAxiDma;
 
/**
 * The configuration structure for AXI DMA engine
 *
 * This structure passes the hardware building information to the driver
 */
typedef struct {
	u32 DeviceId;
	u32 BaseAddr;
 
	int HasStsCntrlStrm;
	int HasMm2S;
	int HasMm2SDRE;
	int Mm2SDataWidth;
	int HasS2Mm;
	int HasS2MmDRE;
	int S2MmDataWidth;
	int HasSg;
	int Mm2sNumChannels;
	int S2MmNumChannels;
	int Mm2SBurstSize;
	int S2MmBurstSize;
	int MicroDmaMode;
	int AddrWidth;		  /**< Address Width */
} XAxiDma_Config;
 
 
/***************** Macros (Inline Functions) Definitions *********************/
/*****************************************************************************/
/**
* Get Transmit (Tx) Ring ptr
*
* Warning: This has a different API than the LLDMA driver. It now returns
* the pointer to the BD ring.
*
* @param	InstancePtr is a pointer to the DMA engine instance to be
*		worked on.
*
* @return	Pointer to the Tx Ring
*
* @note		C-style signature:
* 		XAxiDma_BdRing * XAxiDma_GetTxRing(XAxiDma * InstancePtr)
* 		This function is used only when system is configured as SG mode
*
*****************************************************************************/
#define XAxiDma_GetTxRing(InstancePtr) \
			(&((InstancePtr)->TxBdRing))
 
/*****************************************************************************/
/**
* Get Receive (Rx) Ring ptr
*
* Warning: This has a different API than the LLDMA driver. It now returns
* the pointer to the BD ring.
*
* @param	InstancePtr is a pointer to the DMA engine instance to be
*		worked on.
*
* @return	Pointer to the Rx Ring
*
* @note
* 		C-style signature:
* 		XAxiDma_BdRing * XAxiDma_GetRxRing(XAxiDma * InstancePtr)
*		This function is used only when system is configured as SG mode
*
*****************************************************************************/
#define XAxiDma_GetRxRing(InstancePtr) \
			(&((InstancePtr)->RxBdRing[0]))
 
/*****************************************************************************/
/**
* Get Receive (Rx) Ring ptr of a Index
*
* Warning: This has a different API than the LLDMA driver. It now returns
* the pointer to the BD ring.
*
* @param	InstancePtr is a pointer to the DMA engine instance to be
*		worked on.
* @param	RingIndex is the channel Index.
*
* @return	Pointer to the Rx Ring
*
* @note
* 		C-style signature:
* 		XAxiDma_BdRing * XAxiDma_GetRxIndexRing(XAxiDma * InstancePtr,
						int RingIndex)
*		This function is used only when system is configured as SG mode
*
*****************************************************************************/
#define XAxiDma_GetRxIndexRing(InstancePtr, RingIndex) \
			(&((InstancePtr)->RxBdRing[RingIndex]))
 
/*****************************************************************************/
/**
* This function checks whether system is configured as Simple or
* Scatter Gather mode
*
* @param	InstancePtr is a pointer to the DMA engine instance to be
*		worked on.
*
* @return
*		- TRUE if configured as SG mode
*		- FALSE if configured as simple mode
*
* @note		None
*
*****************************************************************************/
#define XAxiDma_HasSg(InstancePtr)	((InstancePtr)->HasSg) ? TRUE : FALSE
 
/*****************************************************************************/
/**
 * This function enables interrupts specified by the Mask in specified
 * direction, Interrupts that are not in the mask are not affected.
 *
 * @param	InstancePtr is the driver instance we are working on
 * @param	Mask is the mask for the interrupts to be enabled
 * @param	Direction is DMA transfer direction, valid values are
 *			- XAXIDMA_DMA_TO_DEVICE.
 *			- XAXIDMA_DEVICE_TO_DMA.
 * @return	None
 *
 * @note	None
 *
 *****************************************************************************/
#define  XAxiDma_IntrEnable(InstancePtr, Mask, Direction) 	\
	XAxiDma_WriteReg((InstancePtr)->RegBase + \
			(XAXIDMA_RX_OFFSET * Direction), XAXIDMA_CR_OFFSET, \
			(XAxiDma_ReadReg((InstancePtr)->RegBase + \
			(XAXIDMA_RX_OFFSET * Direction), XAXIDMA_CR_OFFSET)) \
			| (Mask & XAXIDMA_IRQ_ALL_MASK))
 
 
/*****************************************************************************/
/**
 * This function gets the mask for the interrupts that are currently enabled
 *
 * @param	InstancePtr is the driver instance we are working on
 * @param	Direction is DMA transfer direction, valid values are
 *			- XAXIDMA_DMA_TO_DEVICE.
 *			- XAXIDMA_DEVICE_TO_DMA.
 *
 * @return	The bit mask for the interrupts that are currently enabled
 *
 * @note	None
 *
 *****************************************************************************/
#define   XAxiDma_IntrGetEnabled(InstancePtr, Direction)	\
			XAxiDma_ReadReg((InstancePtr)->RegBase + \
			(XAXIDMA_RX_OFFSET * Direction), XAXIDMA_CR_OFFSET) &\
							XAXIDMA_IRQ_ALL_MASK)
 
 
 
/*****************************************************************************/
/**
 * This function disables interrupts specified by the Mask. Interrupts that
 * are not in the mask are not affected.
 *
 * @param	InstancePtr is the driver instance we are working on
 * @param	Mask is the mask for the interrupts to be disabled
 * @param	Direction is DMA transfer direction, valid values are
 *			- XAXIDMA_DMA_TO_DEVICE.
 *			- XAXIDMA_DEVICE_TO_DMA.
 * @return	None
 *
 * @note	None
 *
 *****************************************************************************/
 #define XAxiDma_IntrDisable(InstancePtr, Mask, Direction)	\
		XAxiDma_WriteReg((InstancePtr)->RegBase + \
			(XAXIDMA_RX_OFFSET * Direction), XAXIDMA_CR_OFFSET, \
			(XAxiDma_ReadReg((InstancePtr)->RegBase + \
			(XAXIDMA_RX_OFFSET * Direction), XAXIDMA_CR_OFFSET)) \
			& ~(Mask & XAXIDMA_IRQ_ALL_MASK))
 
 
/*****************************************************************************/
/**
 * This function gets the interrupts that are asserted.
 *
 * @param	InstancePtr is the driver instance we are working on
 * @param	Direction is DMA transfer direction, valid values are
 *			- XAXIDMA_DMA_TO_DEVICE.
 *			- XAXIDMA_DEVICE_TO_DMA.
 *
 * @return	The bit mask for the interrupts asserted.
 *
 * @note	None
 *
 *****************************************************************************/
#define  XAxiDma_IntrGetIrq(InstancePtr, Direction)	\
			(XAxiDma_ReadReg((InstancePtr)->RegBase + \
			(XAXIDMA_RX_OFFSET * Direction), XAXIDMA_SR_OFFSET) &\
							XAXIDMA_IRQ_ALL_MASK)
 
/*****************************************************************************/
/**
 * This function acknowledges the interrupts that are specified in Mask
 *
 * @param	InstancePtr is the driver instance we are working on
 * @param	Mask is the mask for the interrupts to be acknowledge
 * @param	Direction is DMA transfer direction, valid values are
 *			- XAXIDMA_DMA_TO_DEVICE.
 *			- XAXIDMA_DEVICE_TO_DMA.
 *
 * @return	None
 *
 * @note	None.
 *
 *****************************************************************************/
#define  XAxiDma_IntrAckIrq(InstancePtr, Mask, Direction)	\
			XAxiDma_WriteReg((InstancePtr)->RegBase + \
			(XAXIDMA_RX_OFFSET * Direction), XAXIDMA_SR_OFFSET, \
			(Mask) & XAXIDMA_IRQ_ALL_MASK)
 
 
 
/************************** Function Prototypes ******************************/
 
/*
 * Initialization and control functions in xaxidma.c
 */
XAxiDma_Config *XAxiDma_LookupConfig(u32 DeviceId);
int XAxiDma_CfgInitialize(XAxiDma * InstancePtr, XAxiDma_Config *Config);
void XAxiDma_Reset(XAxiDma * InstancePtr);
int XAxiDma_ResetIsDone(XAxiDma * InstancePtr);
int XAxiDma_Pause(XAxiDma * InstancePtr);
int XAxiDma_Resume(XAxiDma * InstancePtr);
u32 XAxiDma_Busy(XAxiDma *InstancePtr,int Direction);
u32 XAxiDma_SimpleTransfer(XAxiDma *InstancePtr, UINTPTR BuffAddr, u32 Length,
	int Direction);
int XAxiDma_SelectKeyHole(XAxiDma *InstancePtr, int Direction, int Select);
int XAxiDma_SelectCyclicMode(XAxiDma *InstancePtr, int Direction, int Select);
int XAxiDma_Selftest(XAxiDma * InstancePtr);
#ifdef __cplusplus
}
#endif
 
#endif /* end of protection macro */
/** @} */