fix(hal): updated API description and added comments

components/hal/esp32c3/include/hal/aes_ll.h

@@ -151,7 +151,7 @@ static inline esp_aes_state_t aes_ll_get_state(void)
  *
  * @note Only used for DMA transforms
  *
- * @param mode
+ * @param mode Mode of operation to set (e.g., ECB, CBC, CTR, etc.)
  */
 static inline void aes_ll_set_block_mode(esp_aes_mode_t mode)
 {

components/hal/esp32c3/include/hal/ds_ll.h

@@ -104,6 +104,7 @@ static inline void ds_ll_configure_iv(const uint32_t *iv)
 static inline void ds_ll_write_message(const uint8_t *msg, size_t size)
 {
     memcpy((uint8_t*) DS_X_BASE, msg, size);
+    // Fence ensures all memory operations are completed before proceeding further
     asm volatile ("fence");
 }
 
@@ -131,6 +132,7 @@ static inline void ds_ll_write_private_key_params(const uint8_t *encrypted_key_p
     for (int i = 0; i < NUM_FRAGS; i++) {
         memcpy((uint8_t *)frags[i].addr, from, frags[i].len);
         asm volatile ("fence");
+        // Fence ensures all memory operations are completed before proceeding further
         from += frags[i].len;
     }
 }
@@ -177,6 +179,7 @@ static inline ds_signature_check_t ds_ll_check_signature(void)
 static inline void ds_ll_read_result(uint8_t *result, size_t size)
 {
     memcpy(result, (uint8_t*) DS_Z_BASE, size);
+    // Fence ensures all memory operations are completed before proceeding further
     asm volatile ("fence");
 }