MIMXRT1050: Fix ENET issues

This is a fix for Issue 10239. The change includes
1. Invalidate receive buffers
2. Align the receive buffer lengths

Signed-off-by: Mahesh Mahadevan <[email protected]>

Author: mmahadevan108

features/netsocket/emac-drivers/TARGET_NXP_EMAC/TARGET_IMX/imx_emac.cpp

@@ -43,6 +43,9 @@
 #include "mbed_shared_queues.h"
 
 #include "fsl_phy.h"
+#if defined(FSL_SDK_ENABLE_DRIVER_CACHE_CONTROL) && FSL_SDK_ENABLE_DRIVER_CACHE_CONTROL
+#include "fsl_cache.h"
+#endif /* FSL_SDK_ENABLE_DRIVER_CACHE_CONTROL */
 
 #include "imx_emac_config.h"
 #include "imx_emac.h"
@@ -189,7 +192,8 @@ bool Kinetis_EMAC::low_level_init_successful()
 
     /* Create buffers for each receive BD */
     for (i = 0; i < ENET_RX_RING_LEN; i++) {
-        rx_buff[i] = memory_manager->alloc_heap(ENET_ETH_MAX_FLEN, ENET_BUFF_ALIGNMENT);
+        rx_buff[i] = memory_manager->alloc_heap(ENET_ALIGN(ENET_ETH_MAX_FLEN, ENET_BUFF_ALIGNMENT),
+                                                ENET_BUFF_ALIGNMENT);
         if (NULL == rx_buff[i])
             return false;
 
@@ -278,8 +282,14 @@ emac_mem_buf_t *Kinetis_EMAC::low_level_input(int idx)
         p = rx_buff[idx];
         memory_manager->set_len(p, length);
 
+#if defined(FSL_SDK_ENABLE_DRIVER_CACHE_CONTROL) && FSL_SDK_ENABLE_DRIVER_CACHE_CONTROL
+        /* Add the cache invalidate maintain. */
+        DCACHE_InvalidateByRange((uint32_t)bdPtr->buffer, g_handle.rxBuffSizeAlign[0]);
+#endif  /* FSL_SDK_ENABLE_DRIVER_CACHE_CONTROL */
+
         /* Attempt to queue new buffer */
-        temp_rxbuf = memory_manager->alloc_heap(ENET_ETH_MAX_FLEN, ENET_BUFF_ALIGNMENT);
+        temp_rxbuf = memory_manager->alloc_heap(ENET_ALIGN(ENET_ETH_MAX_FLEN, ENET_BUFF_ALIGNMENT),
+                                                ENET_BUFF_ALIGNMENT);
         if (NULL == temp_rxbuf) {
             /* Re-queue the same buffer */
             update_read_buffer(NULL);

targets/targets.json

@@ -1917,6 +1917,7 @@
             "SKIP_SYSCLK_INIT",
             "FSL_FEATURE_PHYKSZ8081_USE_RMII50M_MODE",
             "SDRAM_IS_SHAREABLE",
+            "FSL_SDK_ENABLE_DRIVER_CACHE_CONTROL=1",
             "MBED_MPU_CUSTOM"
         ],
         "inherits": ["Target"],