feat: remove cyclic flag, enable err irq

Author: patrislav1

src/UioAxiDmaIf.cpp

@@ -12,6 +12,7 @@
 #include "udmaio/UioAxiDmaIf.hpp"
 
 #include <ios>
+#include <stdexcept>
 
 namespace udmaio {
 
@@ -32,8 +33,9 @@ void UioAxiDmaIf::start(uintptr_t start_desc) {
         << "DMA ctrl = 0x" << std::hex << reg_to_raw(ctrl_reg) << std::dec;
 
     ctrl_reg.rs = 1;
-    ctrl_reg.cyclic_bd_enable = 1;
+    ctrl_reg.cyclic_bd_enable = 0;
     ctrl_reg.ioc_irq_en = 1;
+    ctrl_reg.err_irq_en = 1;
 
     // 3.
     s2mm_dmacr.wr(ctrl_reg);
@@ -52,9 +54,18 @@ void UioAxiDmaIf::start(uintptr_t start_desc) {
 uint32_t UioAxiDmaIf::clear_interrupt() {
     uint32_t irq_count = wait_for_interrupt();
 
-    s2mm_dmasr.wr({.ioc_irq = 1});
+    auto stat = s2mm_dmasr.rd();
+    if (stat.ioc_irq) {
+        BOOST_LOG_SEV(_lg, bls::trace) << "I/O IRQ";
+    }
+    if (stat.err_irq) {
+        BOOST_LOG_SEV(_lg, bls::warning) << "ERR IRQ";
+        if (check_for_errors()) {
+            throw std::runtime_error("DMA engine error raised");
+        }
+    }
+    s2mm_dmasr.wr({.ioc_irq = stat.ioc_irq, .err_irq = stat.err_irq});
 
-    BOOST_LOG_SEV(_lg, bls::trace) << "clear interrupt";
     return irq_count;
 }