am64x/am243x: hdsl: Add retry for Udma_ringDequeueRaw if it fails

- Switch to polling mode for UDMA completion
- In release mode, Udma_ringDequeueRaw() returns timeout
- Update App_udmaTrpdInit() to do fixed configuration only once. This
  reduces the copy time.

Fixes: PINDSW-6659

Signed-off-by: Dhaval Khandla <dhavaljk@ti.com>

examples/position_sense/hdsl_diagnostic/hdsl_diagnostic.c

@@ -161,8 +161,6 @@ HDSL_Interface gHdslInterfaceTrace[NUM_RESOURCES] __attribute__((aligned(128), s
 
 HwiP_Object gPRUHwiObject;
 
-/* Semaphore to indicate transfer completion */
-static SemaphoreP_Object gUdmaTestDoneSem;
 /* UDMA TRPD Memory */
 uint8_t gUdmaTestTrpdMem[UDMA_TEST_TRPD_SIZE] __attribute__((aligned(UDMA_CACHELINE_ALIGNMENT)));
 #endif
@@ -185,7 +183,10 @@ static void App_udmaTrpdInit(Udma_ChHandle chHandle,
 {
     CSL_UdmapTR15  *pTr;
     uint32_t        cqRingNum = Udma_chGetCqRingNum(chHandle);
+    static          uint32_t initDone = 0;
 
+    if(initDone == 0)
+    {
         /* Make TRPD with TR15 TR type */
         UdmaUtils_makeTrpdTr15(trpdMem, 1U, cqRingNum);
 
@@ -220,10 +221,20 @@ static void App_udmaTrpdInit(Udma_ChHandle chHandle,
         pTr->ddim2    = (pTr->dicnt0 * pTr->dicnt1);
         pTr->ddim3    = (pTr->dicnt0 * pTr->dicnt1 * pTr->dicnt2);
         pTr->daddr    = (uint64_t) Udma_defaultVirtToPhyFxn(destBuf, 0U, NULL);
-
         /* Perform cache writeback */
         CacheP_wb(trpdMem, UDMA_TEST_TRPD_SIZE, CacheP_TYPE_ALLD);
 
+        initDone = 1;
+    }
+    else
+    {
+        pTr = UdmaUtils_getTrpdTr15Pointer(trpdMem, 0U);
+        pTr->daddr    = (uint64_t) Udma_defaultVirtToPhyFxn(destBuf, 0U, NULL);
+        /* Perform cache writeback */
+        CacheP_wb(trpdMem, UDMA_TEST_TRPD_SIZE, CacheP_TYPE_ALLD);
+    }
+
+
     return;
 }
 
@@ -243,30 +254,23 @@ void udma_copy(uint8_t *srcBuf, uint8_t *destBuf, uint32_t length)
     DebugP_assert(UDMA_SOK == retVal);
 
     /* Wait for return descriptor in completion ring - this marks transfer completion */
-    SemaphoreP_pend(&gUdmaTestDoneSem, SystemP_WAIT_FOREVER);
+    while(1)
-
+    {
         retVal = Udma_ringDequeueRaw(Udma_chGetCqRingHandle(chHandle), &pDesc);
-    DebugP_assert(UDMA_SOK == retVal);
+        if(UDMA_SOK == retVal)
-
+        {
             /* Check TR response status */
             CacheP_inv(trpdMem, UDMA_TEST_TRPD_SIZE, CacheP_TYPE_ALLD);
-
             trRespStatus = UdmaUtils_getTrpdTr15Response(trpdMem, 1U, 0U);
-    //DebugP_log("\r\n.trRespStatus = %u ", trRespStatus);
             DebugP_assert(CSL_UDMAP_TR_RESPONSE_STATUS_COMPLETE == trRespStatus);
+            break;
+        }
+    }
 
     /* Validate data in destination memory */
     CacheP_inv(destBuf, length, CacheP_TYPE_ALLD);
 }
 
-void App_udmaEventCb(Udma_EventHandle eventHandle, uint32_t eventType, void *appData)
-{
-    if(UDMA_EVENT_TYPE_DMA_COMPLETION == eventType)
-    {
-        SemaphoreP_post(&gUdmaTestDoneSem);
-    }
-}
-
 static void HDSL_IsrFxn()
 {
     static uint64_t h_frames_count = 0;
@@ -1245,7 +1249,7 @@ void hdsl_diagnostic_main(void *arg)
     uint8_t     ureg;
 
 #ifndef HDSL_MULTI_CHANNEL
-    int32_t     retVal = UDMA_SOK, status;
+    int32_t     retVal = UDMA_SOK;
 #endif
 
     /* Open drivers to open the UART driver for console */
@@ -1255,8 +1259,6 @@ void hdsl_diagnostic_main(void *arg)
 #ifndef HDSL_MULTI_CHANNEL
     /* UDMA initialization */
     chHandle = gConfigUdma0BlkCopyChHandle[0];  /* Has to be done after driver open */
-    status = SemaphoreP_constructBinary(&gUdmaTestDoneSem, 0);
-    DebugP_assert(SystemP_SUCCESS == status);
     /* Channel enable */
     retVal = Udma_chEnable(chHandle);
     DebugP_assert(UDMA_SOK == retVal);

examples/position_sense/hdsl_diagnostic/single_channel/am243x-evm/r5fss0-0_freertos/example.syscfg

@@ -45,7 +45,6 @@ pruicss1.AdditionalICSSSettings[0].$name = "CONFIG_PRU_ICSS_IO0";
 udma1.$name                                     = "CONFIG_UDMA0";
 udma1.udmaBlkCopyChannel.create(1);
 udma1.udmaBlkCopyChannel[0].$name               = "CONFIG_UDMA_BLKCOPY_CH0";
-udma1.udmaBlkCopyChannel[0].intrEnable          = true;
 udma1.udmaBlkCopyChannel[0].transferCallbackFxn = "App_udmaEventCb";
 
 debug_log.enableUartLog        = true;

examples/position_sense/hdsl_diagnostic/single_channel/am243x-lp/r5fss0-0_freertos/example.syscfg

@@ -45,7 +45,6 @@ pruicss1.AdditionalICSSSettings[0].$name = "CONFIG_PRU_ICSS_IO1";
 udma1.$name                                     = "CONFIG_UDMA0";
 udma1.udmaBlkCopyChannel.create(1);
 udma1.udmaBlkCopyChannel[0].$name               = "CONFIG_UDMA_BLKCOPY_CH0";
-udma1.udmaBlkCopyChannel[0].intrEnable          = true;
 udma1.udmaBlkCopyChannel[0].transferCallbackFxn = "App_udmaEventCb";
 
 debug_log.enableUartLog        = true;

examples/position_sense/hdsl_diagnostic/single_channel/am64x-evm/r5fss0-0_freertos/example.syscfg

@@ -45,7 +45,6 @@ pruicss1.AdditionalICSSSettings[0].$name = "CONFIG_PRU_ICSS_IO0";
 udma1.$name                                     = "CONFIG_UDMA0";
 udma1.udmaBlkCopyChannel.create(1);
 udma1.udmaBlkCopyChannel[0].$name               = "CONFIG_UDMA_BLKCOPY_CH0";
-udma1.udmaBlkCopyChannel[0].intrEnable          = true;
 udma1.udmaBlkCopyChannel[0].transferCallbackFxn = "App_udmaEventCb";
 
 debug_log.enableUartLog        = true;