2 * Copyright © 2012 Intel Corporation
4 * Permission is hereby granted, free of charge, to any person obtaining a
5 * copy of this software and associated documentation files (the "Software"),
6 * to deal in the Software without restriction, including without limitation
7 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
8 * and/or sell copies of the Software, and to permit persons to whom the
9 * Software is furnished to do so, subject to the following conditions:
11 * The above copyright notice and this permission notice (including the next
12 * paragraph) shall be included in all copies or substantial portions of the
15 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
16 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
17 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
18 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
19 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
20 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
24 * Ben Widawsky <ben@bwidawsk.net>
33 struct local_drm_i915_reg_read {
35 __u64 val; /* Return value */
38 #define REG_READ_IOCTL DRM_IOWR(DRM_COMMAND_BASE + 0x31, struct local_drm_i915_reg_read)
40 static void handle_bad(int ret, int expected, const char *desc)
42 if (ret != 0 && errno != expected) {
43 fprintf(stderr, "%s - errno was %d, but should have been %d\n",
44 desc, errno, expected);
46 } else if (ret == 0) {
47 fprintf(stderr, "%s - Command succeeded, but should have failed\n",
53 static uint64_t timer_query(int fd)
55 struct local_drm_i915_reg_read reg_read;
57 reg_read.offset = 0x2358;
58 if (drmIoctl(fd, REG_READ_IOCTL, ®_read)) {
59 perror("positive test case failed: ");
68 struct local_drm_i915_reg_read reg_read;
73 reg_read.offset = 0x2358;
74 ret = drmIoctl(fd, REG_READ_IOCTL, ®_read);
75 igt_assert(ret == 0 || errno == EINVAL);
76 igt_require(ret == 0);
78 reg_read.val = timer_query(fd);
80 if (timer_query(fd) == reg_read.val) {
81 fprintf(stderr, "Timer isn't moving, probably busted\n");
86 reg_read.offset = 0x12345678;
87 handle_bad(drmIoctl(fd, REG_READ_IOCTL, ®_read),
88 EINVAL, "bad register");