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/*
* Copyright © 2014 Intel Corporation
*
* Permission is hereby granted, free of charge, to any person obtaining a
* copy of this software and associated documentation files (the "Software"),
* to deal in the Software without restriction, including without limitation
* the rights to use, copy, modify, merge, publish, distribute, sublicense,
* and/or sell copies of the Software, and to permit persons to whom the
* Software is furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice (including the next
* paragraph) shall be included in all copies or substantial portions of the
* Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
* IN THE SOFTWARE.
*
* Authors:
* Chris Wilson <chris@chris-wilson.co.uk>
*
*/
/*
* Testcase: boundary testing of read(drm_fd)
*/
#include "igt.h"
#include <unistd.h>
#include <stdlib.h>
#include <stdint.h>
#include <stdio.h>
#include <string.h>
#include <signal.h>
#include <fcntl.h>
#include <inttypes.h>
#include <errno.h>
#include <sys/stat.h>
#include <sys/ioctl.h>
#include <sys/time.h>
#include <sys/poll.h>
#include "drm.h"
IGT_TEST_DESCRIPTION("Call read(drm) and see if it behaves.");
static void sighandler(int sig)
{
}
static void assert_empty(int fd)
{
struct pollfd pfd = {fd, POLLIN};
do_or_die(poll(&pfd, 1, 0));
}
static void generate_event(int fd)
{
union drm_wait_vblank vbl;
/* We require that pipe 0 is running */
vbl.request.type =
DRM_VBLANK_RELATIVE |
DRM_VBLANK_EVENT;
vbl.request.sequence = 0;
do_ioctl(fd, DRM_IOCTL_WAIT_VBLANK, &vbl);
}
static void wait_for_event(int fd)
{
struct pollfd pfd = {fd, POLLIN};
igt_assert(poll(&pfd, 1, -1) == 1);
}
static int setup(int in, int nonblock)
{
int fd;
int ret = -1;
alarm(0);
fd = dup(in);
if (fd != -1)
ret = fcntl(fd, F_GETFL);
if (ret != -1) {
if (nonblock)
ret |= O_NONBLOCK;
else
ret &= ~O_NONBLOCK;
ret = fcntl(fd, F_SETFL, ret);
}
igt_require(ret != -1);
assert_empty(fd);
return fd;
}
static void teardown(int fd)
{
alarm(0);
assert_empty(fd);
close(fd);
errno = 0;
}
static void test_invalid_buffer(int in)
{
int fd = setup(in, 0);
alarm(1);
igt_assert_eq(read(fd, (void *)-1, 4096), -1);
igt_assert_eq(errno, EFAULT);
teardown(fd);
}
static void test_fault_buffer(int in)
{
int fd = setup(in, 0);
struct drm_mode_map_dumb arg;
char *buf;
memset(&arg, 0, sizeof(arg));
arg.handle = kmstest_dumb_create(fd, 32, 32, 32, NULL, NULL);
do_ioctl(fd, DRM_IOCTL_MODE_MAP_DUMB, &arg);
buf = mmap(0, 4096, PROT_WRITE, MAP_SHARED, fd, arg.offset);
igt_assert(buf != MAP_FAILED);
generate_event(fd);
alarm(1);
igt_assert(read(fd, buf, 4096) > 0);
munmap(buf, 4096);
teardown(fd);
}
static void test_empty(int in, int nonblock, int expected)
{
char buffer[1024];
int fd = setup(in, nonblock);
alarm(1);
igt_assert_eq(read(fd, buffer, sizeof(buffer)), -1);
igt_assert_eq(errno, expected);
teardown(fd);
}
static void test_short_buffer(int in, int nonblock)
{
char buffer[1024]; /* events are typically 32 bytes */
int fd = setup(in, nonblock);
generate_event(fd);
generate_event(fd);
wait_for_event(fd);
alarm(3);
igt_assert_eq(read(fd, buffer, 4), 0);
igt_assert(read(fd, buffer, 40) > 0);
igt_assert(read(fd, buffer, 40) > 0);
teardown(fd);
}
static bool crtc0_active(int fd)
{
union drm_wait_vblank vbl = {};
vbl.request.type = DRM_VBLANK_RELATIVE;
return drmIoctl(fd, DRM_IOCTL_WAIT_VBLANK, &vbl) == 0;
}
igt_main
{
int fd;
signal(SIGALRM, sighandler);
siginterrupt(SIGALRM, 1);
igt_fixture {
fd = drm_open_driver_master(DRIVER_ANY);
igt_require(crtc0_active(fd));
}
igt_subtest("invalid-buffer")
test_invalid_buffer(fd);
igt_subtest("fault-buffer")
test_fault_buffer(fd);
igt_subtest("empty-block")
test_empty(fd, 0, EINTR);
igt_subtest("empty-nonblock")
test_empty(fd, 1, EAGAIN);
igt_subtest("short-buffer-block")
test_short_buffer(fd, 0);
igt_subtest("short-buffer-nonblock")
test_short_buffer(fd, 1);
}
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