tests/dma: add test for DMA driver

fpga/tests/CMakeLists.txt

@@ -2,7 +2,7 @@ set(SOURCES
 	main.cpp
 	fpga.cpp
 	logging.cpp
-#	dma.c
+	dma.cpp
     fifo.cpp
 #	hls.c
 #	intc.c

fpga/tests/dma.cpp

@@ -0,0 +1,63 @@
+#include <criterion/criterion.h>
+
+#include <villas/log.hpp>
+#include <villas/fpga/card.hpp>
+#include <villas/fpga/ips/dma.hpp>
+
+#include <villas/utils.h>
+
+#include "global.hpp"
+
+#include <villas/memory.hpp>
+
+
+Test(fpga, dma, .description = "DMA")
+{
+	auto logger = loggerGetOrCreate("unittest:dma");
+
+	size_t count = 0;
+	for(auto& ip : state.cards.front()->ips) {
+		// skip non-dma IPs
+		if(*ip != villas::fpga::Vlnv("xilinx.com:ip:axi_dma:"))
+			continue;
+
+		logger->info("Testing {}", *ip);
+
+		auto dma = reinterpret_cast<villas::fpga::ip::Dma&>(*ip);
+
+		if(not dma.connectLoopback()) {
+			continue;
+		}
+
+		count++;
+
+		if(not dma.loopbackPossible()) {
+			logger->info("Loopback test not possible for {}", *ip);
+			continue;
+		}
+
+		// Simple DMA can only transfer up to 4 kb due to PCIe page size burst
+		// limitation
+		size_t len = 4 * (1 << 10);
+
+		/* Allocate memory to use with DMA */
+		auto src = villas::HostRam::allocate<char>(len);
+		auto dst = villas::HostRam::allocate<char>(len);
+
+		/* Get new random data */
+		const size_t lenRandom = read_random(&src, len);
+		cr_assert(len == lenRandom, "Failed to get random data");
+
+		/* Start transfer */
+		cr_assert(dma.pingPong(src, dst, len), "DMA ping pong failed");
+
+		/* Compare data */
+		cr_assert(memcmp(&src, &dst, len) == 0, "Data not equal");
+
+		logger->info(TXT_GREEN("Passed"));
+	}
+
+	villas::MemoryManager::get().dump();
+
+	cr_assert(count > 0, "No Dma found");
+}