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https://git.rwth-aachen.de/acs/public/villas/node/
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98 lines
2.8 KiB
C++
98 lines
2.8 KiB
C++
/* DMA unit test.
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*
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* Author: Steffen Vogel <post@steffenvogel.de>
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* SPDX-FileCopyrightText: 2017 Steffen Vogel <post@steffenvogel.de>
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* SPDX-License-Identifier: Apache-2.0
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*/
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#include <criterion/criterion.h>
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#include <villas/fpga/card.hpp>
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#include <villas/fpga/ips/bram.hpp>
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#include <villas/fpga/ips/dma.hpp>
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#include <villas/log.hpp>
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#include <villas/memory.hpp>
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#include <villas/utils.hpp>
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#include "global.hpp"
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using namespace villas;
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// cppcheck-suppress unknownMacro
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Test(fpga, dma, .description = "DMA") {
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auto logger = logging.get("unit-test:dma");
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std::list<std::shared_ptr<fpga::ip::Dma>> dmaIps;
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for (auto &ip : state.cards.front()->ips) {
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if (*ip == fpga::Vlnv("xilinx.com:ip:axi_dma:")) {
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auto dma = std::dynamic_pointer_cast<fpga::ip::Dma>(ip);
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dmaIps.push_back(dma);
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}
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}
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size_t count = 0;
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for (auto &dma : dmaIps) {
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logger->info("Testing {}", *dma);
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if (not dma->loopbackPossible()) {
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logger->info("Loopback test not possible for {}", *dma);
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continue;
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}
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dma->connectLoopback();
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// Simple DMA can only transfer up to 4 kb due to PCIe page size burst
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// limitation
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size_t len = 4 * (1 << 10);
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#if 0
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// Allocate memory to use with DMA
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auto src = HostDmaRam::getAllocator().allocate<char>(len);
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auto dst = HostDmaRam::getAllocator().allocate<char>(len);
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#elif 0
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// ... only works with IOMMU enabled currently
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// Find a block RAM IP to write to
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auto bramIp = state.cards.front()->lookupIp(
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fpga::Vlnv("xilinx.com:ip:axi_bram_ctrl:"));
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auto bram = std::dynamic_pointer_cast<fpga::ip::Bram>(bramIp);
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cr_assert_not_null(bram, "Couldn't find BRAM");
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auto src = bram->getAllocator().allocate<char>(len);
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auto dst = bram->getAllocator().allocate<char>(len);
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#else
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// ... only works with IOMMU enabled currently
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auto &alloc = villas::HostRam::getAllocator();
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const std::shared_ptr<villas::MemoryBlock> srcBlock =
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alloc.allocateBlock(len);
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const std::shared_ptr<villas::MemoryBlock> dstBlock =
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alloc.allocateBlock(len);
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villas::MemoryAccessor<char> src(*srcBlock);
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villas::MemoryAccessor<char> dst(*dstBlock);
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#endif
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// Make sure memory is accessible for DMA
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dma->makeAccesibleFromVA(srcBlock);
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dma->makeAccesibleFromVA(dstBlock);
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// Get new random data
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const size_t lenRandom = utils::readRandom(&src, len);
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cr_assert(len == lenRandom, "Failed to get random data");
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// Start transfer
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cr_assert(dma->memcpy(src.getMemoryBlock(), dst.getMemoryBlock(), len),
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"DMA ping pong failed");
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// Compare data
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cr_assert(memcmp(&src, &dst, len) == 0, "Data not equal");
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logger->info(CLR_GRN("Passed"));
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count++;
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}
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cr_assert(count > 0, "No DMA found");
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MemoryManager::get().getGraph().dump();
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fpga::ip::Node::getGraph().dump();
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}
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