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emacps:i Add terminating descriptors for unused tx and rx queues

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Added terminating descriptors for unused rx and tx queues to avoid
wrong interpretation of the data that resides in the memory location
ponited by the queue base registers.

Signed-off-by: Punnaiah Choudary Kalluri <punnaia@xilinx.com>
This commit is contained in:
Punnaiah Choudary Kalluri 2015-02-04 21:21:34 +05:30 • committed by Suneel Garapati
parent 1e0945c742
commit ebc7a9922b
1 changed files with 26 additions and 0 deletions
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26
XilinxProcessorIPLib/drivers/emacps/examples/xemacps_example_intr_dma.c
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@ -177,6 +177,10 @@ u32 TxFrameLength;
static XScuGic IntcInstance;
#endif
XEmacPs_Bd BdTxTerminate __attribute__ ((aligned(64)));
XEmacPs_Bd BdRxTerminate __attribute__ ((aligned(64)));
u32 GemVersion;
/*************************** Function Prototypes ****************************/
@ -452,6 +456,28 @@ LONG EmacPsDmaIntrExample(XScuGic * IntcInstancePtr,
return XST_FAILURE;
}
if (GemVersion > 2)
{
/*
* This version of GEM supports priority queuing and the current
* dirver is using tx priority queue 1 and normal rx queue for
* packet transmit and receive. The below code ensure that the
* other queue pointers are parked to known state for avoiding
* the controller to malfunction by fetching the descriptors
* from these queues.
*/
XEmacPs_BdClear(&BdRxTerminate);
XEmacPs_BdSetAddressRx(&BdRxTerminate, (XEMACPS_RXBUF_NEW_MASK |
XEMACPS_RXBUF_WRAP_MASK));
XEmacPs_Out32((Config->BaseAddress + XEMACPS_RXQ1BASE_OFFSET),
&BdRxTerminate);
XEmacPs_BdClear(&BdTxTerminate);
XEmacPs_BdSetStatus(&BdTxTerminate, (XEMACPS_TXBUF_USED_MASK |
XEMACPS_TXBUF_WRAP_MASK));
XEmacPs_Out32((Config->BaseAddress + XEMACPS_TXQBASE_OFFSET),
&BdTxTerminate);
}
/*
* Set emacps to phy loopback
*/