qemu/tests/rtl8139-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

211 lines
5.1 KiB
C

/*
* QTest testcase for Realtek 8139 NIC
*
* Copyright (c) 2013-2014 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 "libqtest.h"
#include "libqos/pci-pc.h"
#include "qemu/timer.h"
#include "qemu-common.h"
/* Tests only initialization so far. TODO: Replace with functional tests */
static void nop(void)
{
}
#define CLK 33333333
static QPCIBus *pcibus;
static QPCIDevice *dev;
static QPCIBar dev_bar;
static void save_fn(QPCIDevice *dev, int devfn, void *data)
{
QPCIDevice **pdev = (QPCIDevice **) data;
*pdev = dev;
}
static QPCIDevice *get_device(void)
{
QPCIDevice *dev;
pcibus = qpci_init_pc(NULL);
qpci_device_foreach(pcibus, 0x10ec, 0x8139, save_fn, &dev);
g_assert(dev != NULL);
return dev;
}
#define PORT(name, len, val) \
static unsigned __attribute__((unused)) in_##name(void) \
{ \
unsigned res = qpci_io_read##len(dev, dev_bar, (val)); \
g_test_message("*%s -> %x\n", #name, res); \
return res; \
} \
static void out_##name(unsigned v) \
{ \
g_test_message("%x -> *%s\n", v, #name); \
qpci_io_write##len(dev, dev_bar, (val), v); \
}
PORT(Timer, l, 0x48)
PORT(IntrMask, w, 0x3c)
PORT(IntrStatus, w, 0x3E)
PORT(TimerInt, l, 0x54)
#define fatal(...) do { g_test_message(__VA_ARGS__); g_assert(0); } while (0)
static void test_timer(void)
{
const unsigned from = 0.95 * CLK;
const unsigned to = 1.6 * CLK;
unsigned prev, curr, next;
unsigned cnt, diff;
out_IntrMask(0);
in_IntrStatus();
in_Timer();
in_Timer();
/* Test 1. test counter continue and continue */
out_TimerInt(0); /* disable timer */
out_IntrStatus(0x4000);
out_Timer(12345); /* reset timer to 0 */
curr = in_Timer();
if (curr > 0.1 * CLK) {
fatal("time too big %u\n", curr);
}
for (cnt = 0; ; ) {
clock_step(1 * NANOSECONDS_PER_SECOND);
prev = curr;
curr = in_Timer();
/* test skip is in a specific range */
diff = (curr-prev) & 0xffffffffu;
if (diff < from || diff > to) {
fatal("Invalid diff %u (%u-%u)\n", diff, from, to);
}
if (curr < prev && ++cnt == 3) {
break;
}
}
/* Test 2. Check we didn't get an interrupt with TimerInt == 0 */
if (in_IntrStatus() & 0x4000) {
fatal("got an interrupt\n");
}
/* Test 3. Setting TimerInt to 1 and Timer to 0 get interrupt */
out_TimerInt(1);
out_Timer(0);
clock_step(40);
if ((in_IntrStatus() & 0x4000) == 0) {
fatal("we should have an interrupt here!\n");
}
/* Test 3. Check acknowledge */
out_IntrStatus(0x4000);
if (in_IntrStatus() & 0x4000) {
fatal("got an interrupt\n");
}
/* Test. Status set after Timer reset */
out_Timer(0);
out_TimerInt(0);
out_IntrStatus(0x4000);
curr = in_Timer();
out_TimerInt(curr + 0.5 * CLK);
clock_step(1 * NANOSECONDS_PER_SECOND);
out_Timer(0);
if ((in_IntrStatus() & 0x4000) == 0) {
fatal("we should have an interrupt here!\n");
}
/* Test. Status set after TimerInt reset */
out_Timer(0);
out_TimerInt(0);
out_IntrStatus(0x4000);
curr = in_Timer();
out_TimerInt(curr + 0.5 * CLK);
clock_step(1 * NANOSECONDS_PER_SECOND);
out_TimerInt(0);
if ((in_IntrStatus() & 0x4000) == 0) {
fatal("we should have an interrupt here!\n");
}
/* Test 4. Increment TimerInt we should see an interrupt */
curr = in_Timer();
next = curr + 5.0 * CLK;
out_TimerInt(next);
for (cnt = 0; ; ) {
clock_step(1 * NANOSECONDS_PER_SECOND);
prev = curr;
curr = in_Timer();
diff = (curr-prev) & 0xffffffffu;
if (diff < from || diff > to) {
fatal("Invalid diff %u (%u-%u)\n", diff, from, to);
}
if (cnt < 3 && curr > next) {
if ((in_IntrStatus() & 0x4000) == 0) {
fatal("we should have an interrupt here!\n");
}
out_IntrStatus(0x4000);
next = curr + 5.0 * CLK;
out_TimerInt(next);
if (++cnt == 3) {
out_TimerInt(1);
}
/* Test 5. Second time we pass from 0 should see an interrupt */
} else if (cnt >= 3 && curr < prev) {
/* here we should have an interrupt */
if ((in_IntrStatus() & 0x4000) == 0) {
fatal("we should have an interrupt here!\n");
}
out_IntrStatus(0x4000);
if (++cnt == 5) {
break;
}
}
}
g_test_message("Everythink is ok!\n");
}
static void test_init(void)
{
uint64_t barsize;
dev = get_device();
dev_bar = qpci_iomap(dev, 0, &barsize);
qpci_device_enable(dev);
test_timer();
}
int main(int argc, char **argv)
{
int ret;
g_test_init(&argc, &argv, NULL);
qtest_add_func("/rtl8139/nop", nop);
qtest_add_func("/rtl8139/timer", test_init);
qtest_start("-device rtl8139");
ret = g_test_run();
qtest_end();
return ret;
}