/*
 * QTest testcase for NVMe
 *
 * Copyright (c) 2014 SUSE LINUX Products GmbH
 *
 * This work is licensed under the terms of the GNU GPL, version 2 or later.
 * See the COPYING file in the top-level directory.
 */

#include "qemu/osdep.h"
#include "qemu/module.h"
#include "qemu/units.h"
#include "libqtest.h"
#include "libqos/qgraph.h"
#include "libqos/pci.h"

typedef struct QNvme QNvme;

struct QNvme {
    QOSGraphObject obj;
    QPCIDevice dev;
};

static void *nvme_get_driver(void *obj, const char *interface)
{
    QNvme *nvme = obj;

    if (!g_strcmp0(interface, "pci-device")) {
        return &nvme->dev;
    }

    fprintf(stderr, "%s not present in nvme\n", interface);
    g_assert_not_reached();
}

static void *nvme_create(void *pci_bus, QGuestAllocator *alloc, void *addr)
{
    QNvme *nvme = g_new0(QNvme, 1);
    QPCIBus *bus = pci_bus;

    qpci_device_init(&nvme->dev, bus, addr);
    nvme->obj.get_driver = nvme_get_driver;

    return &nvme->obj;
}

/* This used to cause a NULL pointer dereference.  */
static void nvmetest_oob_cmb_test(void *obj, void *data, QGuestAllocator *alloc)
{
    const int cmb_bar_size = 2 * MiB;
    QNvme *nvme = obj;
    QPCIDevice *pdev = &nvme->dev;
    QPCIBar bar;

    qpci_device_enable(pdev);
    bar = qpci_iomap(pdev, 2, NULL);

    qpci_io_writel(pdev, bar, 0, 0xccbbaa99);
    g_assert_cmpint(qpci_io_readb(pdev, bar, 0), ==, 0x99);
    g_assert_cmpint(qpci_io_readw(pdev, bar, 0), ==, 0xaa99);

    /* Test partially out-of-bounds accesses.  */
    qpci_io_writel(pdev, bar, cmb_bar_size - 1, 0x44332211);
    g_assert_cmpint(qpci_io_readb(pdev, bar, cmb_bar_size - 1), ==, 0x11);
    g_assert_cmpint(qpci_io_readw(pdev, bar, cmb_bar_size - 1), !=, 0x2211);
    g_assert_cmpint(qpci_io_readl(pdev, bar, cmb_bar_size - 1), !=, 0x44332211);
}

static void nvme_register_nodes(void)
{
    QOSGraphEdgeOptions opts = {
        .extra_device_opts = "addr=04.0,drive=drv0,serial=foo",
        .before_cmd_line = "-drive id=drv0,if=none,file=null-co://,format=raw",
    };

    add_qpci_address(&opts, &(QPCIAddress) { .devfn = QPCI_DEVFN(4, 0) });

    qos_node_create_driver("nvme", nvme_create);
    qos_node_consumes("nvme", "pci-bus", &opts);
    qos_node_produces("nvme", "pci-device");

    qos_add_test("oob-cmb-access", "nvme", nvmetest_oob_cmb_test, &(QOSGraphTestOptions) {
        .edge.extra_device_opts = "cmb_size_mb=2"
    });
}

libqos_init(nvme_register_nodes);