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qemu/tests/tco-test.c
David Gibson b4ba67d9a7 libqos: Change PCI accessors to take opaque BAR handle 
The usual use model for the libqos PCI functions is to map a specific PCI
BAR using qpci_iomap() then pass the returned token into IO accessor
functions.  This, and the fact that iomap() returns a (void *) which
actually contains a PCI space address, kind of suggests that the return
value from iomap is supposed to be an opaque token.

..except that the callers expect to be able to add offsets to it.  Which
also assumes the compiler will support pointer arithmetic on a (void *),
and treat it as working with byte offsets.

To clarify this situation change iomap() and the IO accessors to take
a definitely opaque BAR handle (enforced with a wrapper struct) along with
an offset within the BAR.  This changes both the functions and all the
callers.

There were a number of places that checked if iomap() returned non-NULL,
and or initialized it to NULL before hand.  Since iomap() already assert()s
if it fails to map the BAR, these tests were mostly pointless and are
removed.

Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
Reviewed-by: Greg Kurz <groug@kaod.org>
2016-10-28 09:38:27 +11:00

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/*
* QEMU ICH9 TCO emulation tests
*
* Copyright (c) 2015 Paulo Alcantara <pcacjr@zytor.com>
*
* 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 "libqtest.h"
#include "libqos/pci.h"
#include "libqos/pci-pc.h"
#include "hw/pci/pci_regs.h"
#include "hw/i386/ich9.h"
#include "hw/acpi/ich9.h"
#include "hw/acpi/tco.h"
#define RCBA_BASE_ADDR 0xfed1c000
#define PM_IO_BASE_ADDR 0xb000
enum {
TCO_RLD_DEFAULT = 0x0000,
TCO_DAT_IN_DEFAULT = 0x00,
TCO_DAT_OUT_DEFAULT = 0x00,
TCO1_STS_DEFAULT = 0x0000,
TCO2_STS_DEFAULT = 0x0000,
TCO1_CNT_DEFAULT = 0x0000,
TCO2_CNT_DEFAULT = 0x0008,
TCO_MESSAGE1_DEFAULT = 0x00,
TCO_MESSAGE2_DEFAULT = 0x00,
TCO_WDCNT_DEFAULT = 0x00,
TCO_TMR_DEFAULT = 0x0004,
SW_IRQ_GEN_DEFAULT = 0x03,
};
#define TCO_SECS_TO_TICKS(secs) (((secs) * 10) / 6)
#define TCO_TICKS_TO_SECS(ticks) (((ticks) * 6) / 10)
typedef struct {
const char *args;
bool noreboot;
QPCIDevice *dev;
QPCIBar tco_io_bar;
} TestData;
static void test_init(TestData *d)
{
QPCIBus *bus;
QTestState *qs;
char *s;
s = g_strdup_printf("-machine q35 %s %s",
d->noreboot ? "" : "-global ICH9-LPC.noreboot=false",
!d->args ? "" : d->args);
qs = qtest_start(s);
qtest_irq_intercept_in(qs, "ioapic");
g_free(s);
bus = qpci_init_pc(NULL);
d->dev = qpci_device_find(bus, QPCI_DEVFN(0x1f, 0x00));
g_assert(d->dev != NULL);
qpci_device_enable(d->dev);
/* set ACPI PM I/O space base address */
qpci_config_writel(d->dev, ICH9_LPC_PMBASE, PM_IO_BASE_ADDR | 0x1);
/* enable ACPI I/O */
qpci_config_writeb(d->dev, ICH9_LPC_ACPI_CTRL, 0x80);
/* set Root Complex BAR */
qpci_config_writel(d->dev, ICH9_LPC_RCBA, RCBA_BASE_ADDR | 0x1);
d->tco_io_bar = qpci_legacy_iomap(d->dev, PM_IO_BASE_ADDR + 0x60);
}
static void stop_tco(const TestData *d)
{
uint32_t val;
val = qpci_io_readw(d->dev, d->tco_io_bar, TCO1_CNT);
val |= TCO_TMR_HLT;
qpci_io_writew(d->dev, d->tco_io_bar, TCO1_CNT, val);
}
static void start_tco(const TestData *d)
{
uint32_t val;
val = qpci_io_readw(d->dev, d->tco_io_bar, TCO1_CNT);
val &= ~TCO_TMR_HLT;
qpci_io_writew(d->dev, d->tco_io_bar, TCO1_CNT, val);
}
static void load_tco(const TestData *d)
{
qpci_io_writew(d->dev, d->tco_io_bar, TCO_RLD, 4);
}
static void set_tco_timeout(const TestData *d, uint16_t ticks)
{
qpci_io_writew(d->dev, d->tco_io_bar, TCO_TMR, ticks);
}
static void clear_tco_status(const TestData *d)
{
qpci_io_writew(d->dev, d->tco_io_bar, TCO1_STS, 0x0008);
qpci_io_writew(d->dev, d->tco_io_bar, TCO2_STS, 0x0002);
qpci_io_writew(d->dev, d->tco_io_bar, TCO2_STS, 0x0004);
}
static void reset_on_second_timeout(bool enable)
{
uint32_t val;
val = readl(RCBA_BASE_ADDR + ICH9_CC_GCS);
if (enable) {
val &= ~ICH9_CC_GCS_NO_REBOOT;
} else {
val |= ICH9_CC_GCS_NO_REBOOT;
}
writel(RCBA_BASE_ADDR + ICH9_CC_GCS, val);
}
static void test_tco_defaults(void)
{
TestData d;
d.args = NULL;
d.noreboot = true;
test_init(&d);
g_assert_cmpint(qpci_io_readw(d.dev, d.tco_io_bar, TCO_RLD), ==,
TCO_RLD_DEFAULT);
/* TCO_DAT_IN & TCO_DAT_OUT */
g_assert_cmpint(qpci_io_readw(d.dev, d.tco_io_bar, TCO_DAT_IN), ==,
(TCO_DAT_OUT_DEFAULT << 8) | TCO_DAT_IN_DEFAULT);
/* TCO1_STS & TCO2_STS */
g_assert_cmpint(qpci_io_readl(d.dev, d.tco_io_bar, TCO1_STS), ==,
(TCO2_STS_DEFAULT << 16) | TCO1_STS_DEFAULT);
/* TCO1_CNT & TCO2_CNT */
g_assert_cmpint(qpci_io_readl(d.dev, d.tco_io_bar, TCO1_CNT), ==,
(TCO2_CNT_DEFAULT << 16) | TCO1_CNT_DEFAULT);
/* TCO_MESSAGE1 & TCO_MESSAGE2 */
g_assert_cmpint(qpci_io_readw(d.dev, d.tco_io_bar, TCO_MESSAGE1), ==,
(TCO_MESSAGE2_DEFAULT << 8) | TCO_MESSAGE1_DEFAULT);
g_assert_cmpint(qpci_io_readb(d.dev, d.tco_io_bar, TCO_WDCNT), ==,
TCO_WDCNT_DEFAULT);
g_assert_cmpint(qpci_io_readb(d.dev, d.tco_io_bar, SW_IRQ_GEN), ==,
SW_IRQ_GEN_DEFAULT);
g_assert_cmpint(qpci_io_readw(d.dev, d.tco_io_bar, TCO_TMR), ==,
TCO_TMR_DEFAULT);
qtest_end();
}
static void test_tco_timeout(void)
{
TestData d;
const uint16_t ticks = TCO_SECS_TO_TICKS(4);
uint32_t val;
int ret;
d.args = NULL;
d.noreboot = true;
test_init(&d);
stop_tco(&d);
clear_tco_status(&d);
reset_on_second_timeout(false);
set_tco_timeout(&d, ticks);
load_tco(&d);
start_tco(&d);
clock_step(ticks * TCO_TICK_NSEC);
/* test first timeout */
val = qpci_io_readw(d.dev, d.tco_io_bar, TCO1_STS);
ret = val & TCO_TIMEOUT ? 1 : 0;
g_assert(ret == 1);
/* test clearing timeout bit */
val |= TCO_TIMEOUT;
qpci_io_writew(d.dev, d.tco_io_bar, TCO1_STS, val);
val = qpci_io_readw(d.dev, d.tco_io_bar, TCO1_STS);
ret = val & TCO_TIMEOUT ? 1 : 0;
g_assert(ret == 0);
/* test second timeout */
clock_step(ticks * TCO_TICK_NSEC);
val = qpci_io_readw(d.dev, d.tco_io_bar, TCO1_STS);
ret = val & TCO_TIMEOUT ? 1 : 0;
g_assert(ret == 1);
val = qpci_io_readw(d.dev, d.tco_io_bar, TCO2_STS);
ret = val & TCO_SECOND_TO_STS ? 1 : 0;
g_assert(ret == 1);
stop_tco(&d);
qtest_end();
}
static void test_tco_max_timeout(void)
{
TestData d;
const uint16_t ticks = 0xffff;
uint32_t val;
int ret;
d.args = NULL;
d.noreboot = true;
test_init(&d);
stop_tco(&d);
clear_tco_status(&d);
reset_on_second_timeout(false);
set_tco_timeout(&d, ticks);
load_tco(&d);
start_tco(&d);
clock_step(((ticks & TCO_TMR_MASK) - 1) * TCO_TICK_NSEC);
val = qpci_io_readw(d.dev, d.tco_io_bar, TCO_RLD);
g_assert_cmpint(val & TCO_RLD_MASK, ==, 1);
val = qpci_io_readw(d.dev, d.tco_io_bar, TCO1_STS);
ret = val & TCO_TIMEOUT ? 1 : 0;
g_assert(ret == 0);
clock_step(TCO_TICK_NSEC);
val = qpci_io_readw(d.dev, d.tco_io_bar, TCO1_STS);
ret = val & TCO_TIMEOUT ? 1 : 0;
g_assert(ret == 1);
stop_tco(&d);
qtest_end();
}
static QDict *get_watchdog_action(void)
{
QDict *ev = qmp("");
QDict *data;
g_assert(!strcmp(qdict_get_str(ev, "event"), "WATCHDOG"));
data = qdict_get_qdict(ev, "data");
QINCREF(data);
QDECREF(ev);
return data;
}
static void test_tco_second_timeout_pause(void)
{
TestData td;
const uint16_t ticks = TCO_SECS_TO_TICKS(32);
QDict *ad;
td.args = "-watchdog-action pause";
td.noreboot = false;
test_init(&td);
stop_tco(&td);
clear_tco_status(&td);
reset_on_second_timeout(true);
set_tco_timeout(&td, TCO_SECS_TO_TICKS(16));
load_tco(&td);
start_tco(&td);
clock_step(ticks * TCO_TICK_NSEC * 2);
ad = get_watchdog_action();
g_assert(!strcmp(qdict_get_str(ad, "action"), "pause"));
QDECREF(ad);
stop_tco(&td);
qtest_end();
}
static void test_tco_second_timeout_reset(void)
{
TestData td;
const uint16_t ticks = TCO_SECS_TO_TICKS(16);
QDict *ad;
td.args = "-watchdog-action reset";
td.noreboot = false;
test_init(&td);
stop_tco(&td);
clear_tco_status(&td);
reset_on_second_timeout(true);
set_tco_timeout(&td, TCO_SECS_TO_TICKS(16));
load_tco(&td);
start_tco(&td);
clock_step(ticks * TCO_TICK_NSEC * 2);
ad = get_watchdog_action();
g_assert(!strcmp(qdict_get_str(ad, "action"), "reset"));
QDECREF(ad);
stop_tco(&td);
qtest_end();
}
static void test_tco_second_timeout_shutdown(void)
{
TestData td;
const uint16_t ticks = TCO_SECS_TO_TICKS(128);
QDict *ad;
td.args = "-watchdog-action shutdown";
td.noreboot = false;
test_init(&td);
stop_tco(&td);
clear_tco_status(&td);
reset_on_second_timeout(true);
set_tco_timeout(&td, ticks);
load_tco(&td);
start_tco(&td);
clock_step(ticks * TCO_TICK_NSEC * 2);
ad = get_watchdog_action();
g_assert(!strcmp(qdict_get_str(ad, "action"), "shutdown"));
QDECREF(ad);
stop_tco(&td);
qtest_end();
}
static void test_tco_second_timeout_none(void)
{
TestData td;
const uint16_t ticks = TCO_SECS_TO_TICKS(256);
QDict *ad;
td.args = "-watchdog-action none";
td.noreboot = false;
test_init(&td);
stop_tco(&td);
clear_tco_status(&td);
reset_on_second_timeout(true);
set_tco_timeout(&td, ticks);
load_tco(&td);
start_tco(&td);
clock_step(ticks * TCO_TICK_NSEC * 2);
ad = get_watchdog_action();
g_assert(!strcmp(qdict_get_str(ad, "action"), "none"));
QDECREF(ad);
stop_tco(&td);
qtest_end();
}
static void test_tco_ticks_counter(void)
{
TestData d;
uint16_t ticks = TCO_SECS_TO_TICKS(8);
uint16_t rld;
d.args = NULL;
d.noreboot = true;
test_init(&d);
stop_tco(&d);
clear_tco_status(&d);
reset_on_second_timeout(false);
set_tco_timeout(&d, ticks);
load_tco(&d);
start_tco(&d);
do {
rld = qpci_io_readw(d.dev, d.tco_io_bar, TCO_RLD) & TCO_RLD_MASK;
g_assert_cmpint(rld, ==, ticks);
clock_step(TCO_TICK_NSEC);
ticks--;
} while (!(qpci_io_readw(d.dev, d.tco_io_bar, TCO1_STS) & TCO_TIMEOUT));
stop_tco(&d);
qtest_end();
}
static void test_tco1_control_bits(void)
{
TestData d;
uint16_t val;
d.args = NULL;
d.noreboot = true;
test_init(&d);
val = TCO_LOCK;
qpci_io_writew(d.dev, d.tco_io_bar, TCO1_CNT, val);
val &= ~TCO_LOCK;
qpci_io_writew(d.dev, d.tco_io_bar, TCO1_CNT, val);
g_assert_cmpint(qpci_io_readw(d.dev, d.tco_io_bar, TCO1_CNT), ==,
TCO_LOCK);
qtest_end();
}
static void test_tco1_status_bits(void)
{
TestData d;
uint16_t ticks = 8;
uint16_t val;
int ret;
d.args = NULL;
d.noreboot = true;
test_init(&d);
stop_tco(&d);
clear_tco_status(&d);
reset_on_second_timeout(false);
set_tco_timeout(&d, ticks);
load_tco(&d);
start_tco(&d);
clock_step(ticks * TCO_TICK_NSEC);
qpci_io_writeb(d.dev, d.tco_io_bar, TCO_DAT_IN, 0);
qpci_io_writeb(d.dev, d.tco_io_bar, TCO_DAT_OUT, 0);
val = qpci_io_readw(d.dev, d.tco_io_bar, TCO1_STS);
ret = val & (TCO_TIMEOUT | SW_TCO_SMI | TCO_INT_STS) ? 1 : 0;
g_assert(ret == 1);
qpci_io_writew(d.dev, d.tco_io_bar, TCO1_STS, val);
g_assert_cmpint(qpci_io_readw(d.dev, d.tco_io_bar, TCO1_STS), ==, 0);
qtest_end();
}
static void test_tco2_status_bits(void)
{
TestData d;
uint16_t ticks = 8;
uint16_t val;
int ret;
d.args = NULL;
d.noreboot = true;
test_init(&d);
stop_tco(&d);
clear_tco_status(&d);
reset_on_second_timeout(true);
set_tco_timeout(&d, ticks);
load_tco(&d);
start_tco(&d);
clock_step(ticks * TCO_TICK_NSEC * 2);
val = qpci_io_readw(d.dev, d.tco_io_bar, TCO2_STS);
ret = val & (TCO_SECOND_TO_STS | TCO_BOOT_STS) ? 1 : 0;
g_assert(ret == 1);
qpci_io_writew(d.dev, d.tco_io_bar, TCO2_STS, val);
g_assert_cmpint(qpci_io_readw(d.dev, d.tco_io_bar, TCO2_STS), ==, 0);
qtest_end();
}
int main(int argc, char **argv)
{
g_test_init(&argc, &argv, NULL);
qtest_add_func("tco/defaults", test_tco_defaults);
qtest_add_func("tco/timeout/no_action", test_tco_timeout);
qtest_add_func("tco/timeout/no_action/max", test_tco_max_timeout);
qtest_add_func("tco/second_timeout/pause", test_tco_second_timeout_pause);
qtest_add_func("tco/second_timeout/reset", test_tco_second_timeout_reset);
qtest_add_func("tco/second_timeout/shutdown",
test_tco_second_timeout_shutdown);
qtest_add_func("tco/second_timeout/none", test_tco_second_timeout_none);
qtest_add_func("tco/counter", test_tco_ticks_counter);
qtest_add_func("tco/tco1_control/bits", test_tco1_control_bits);
qtest_add_func("tco/tco1_status/bits", test_tco1_status_bits);
qtest_add_func("tco/tco2_status/bits", test_tco2_status_bits);
return g_test_run();
}
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