common cmake files moved to example_common

stm32h7/networking/ethernetif.c

@@ -597,6 +597,67 @@ void ethernet_link_check_state(struct netif *netif) {
   }
 }
 
+void HAL_ETH_RxAllocateCallback(uint8_t **buff)
+{
+  struct pbuf_custom *p = LWIP_MEMPOOL_ALLOC(RX_POOL);
+  if (p)
+  {
+    /* Get the buff from the struct pbuf address. */
+    *buff = (uint8_t *)p + offsetof(RxBuff_t, buff);
+    p->custom_free_function = pbuf_free_custom;
+    /* Initialize the struct pbuf.
+    * This must be performed whenever a buffer's allocated because it may be
+    * changed by lwIP or the app, e.g., pbuf_free decrements ref. */
+    pbuf_alloced_custom(PBUF_RAW, 0, PBUF_REF, p, *buff, ETH_RX_BUFFER_SIZE);
+  }
+  else
+  {
+    RxAllocStatus = RX_ALLOC_ERROR;
+    *buff = NULL;
+  }
+}
+
+void HAL_ETH_RxLinkCallback(void **pStart, void **pEnd, uint8_t *buff, uint16_t Length)
+{
+  struct pbuf **ppStart = (struct pbuf **)pStart;
+  struct pbuf **ppEnd = (struct pbuf **)pEnd;
+  struct pbuf *p = NULL;
+
+  /* Get the struct pbuf from the buff address. */
+  p = (struct pbuf *)(buff - offsetof(RxBuff_t, buff));
+  p->next = NULL;
+  p->tot_len = 0;
+  p->len = Length;
+
+  /* Chain the buffer. */
+  if (!*ppStart)
+  {
+    /* The first buffer of the packet. */
+    *ppStart = p;
+  }
+  else
+  {
+    /* Chain the buffer to the end of the packet. */
+    (*ppEnd)->next = p;
+  }
+  *ppEnd  = p;
+
+  /* Update the total length of all the buffers of the chain. Each pbuf in the chain should have its tot_len
+   * set to its own length, plus the length of all the following pbufs in the chain. */
+  for (p = *ppStart; p != NULL; p = p->next)
+  {
+    p->tot_len += Length;
+  }
+
+  /* Invalidate data cache because Rx DMA's writing to physical memory makes it stale. */
+  SCB_InvalidateDCache_by_Addr((uint32_t *)buff, Length);
+}
+
+void HAL_ETH_TxFreeCallback(uint32_t * buff)
+{
+  pbuf_free((struct pbuf *)buff);
+}
+
 ETH_HandleTypeDef *getEthernetHandle() { return &EthHandle; }
 
 /************************ (C) COPYRIGHT STMicroelectronics *****END OF FILE****/