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1 /*
2  * Copyright © 2008 Intel Corporation
3  *
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:
10  *
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
13  * Software.
14  *
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
21  * DEALINGS IN THE SOFTWARE.
22  *
23  * Authors:
24  *    Eric Anholt <eric@anholt.net>
25  *
26  */
27 
28 #include <unistd.h>
29 #include <stdlib.h>
30 #include <stdio.h>
31 #include <string.h>
32 #include <errno.h>
33 #include <err.h>
34 #include <assert.h>
35 #include <sys/ioctl.h>
36 #include <fcntl.h>
37 #include <sys/stat.h>
38 #include <sys/mman.h>
39 #include "i915_drm.h"
40 
41 #include "drmtest.h"
42 #include "intel_chipset.h"
43 #include "igt_core.h"
44 
45 /**
46  * SECTION:intel_chipset
47  * @short_description: Feature macros and chipset helpers
48  * @title: Chipset
49  * @include: igt.h
50  *
51  * This library mostly provides feature macros which use raw pci device ids. It
52  * also provides a few more helper functions to handle pci devices, chipset
53  * detection and related issues.
54  */
55 
56 /**
57  * intel_pch:
58  *
59  * Global variable to keep track of the pch type. Can either be set manually or
60  * detected at runtime with intel_check_pch().
61  */
62 enum pch_type intel_pch;
63 
64 /**
65  * intel_get_pci_device:
66  *
67  * Looks up the main graphics pci device using libpciaccess.
68  *
69  * Returns:
70  * The pci_device, exits the program on any failures.
71  */
72 struct pci_device *
intel_get_pci_device(void)73 intel_get_pci_device(void)
74 {
75 	struct pci_device *pci_dev;
76 	int error;
77 
78 	error = pci_system_init();
79 	igt_fail_on_f(error != 0,
80 		      "Couldn't initialize PCI system\n");
81 
82 	/* Grab the graphics card. Try the canonical slot first, then
83 	 * walk the entire PCI bus for a matching device. */
84 	pci_dev = pci_device_find_by_slot(0, 0, 2, 0);
85 	if (pci_dev == NULL || pci_dev->vendor_id != 0x8086) {
86 		struct pci_device_iterator *iter;
87 		struct pci_id_match match;
88 
89 		match.vendor_id = 0x8086; /* Intel */
90 		match.device_id = PCI_MATCH_ANY;
91 		match.subvendor_id = PCI_MATCH_ANY;
92 		match.subdevice_id = PCI_MATCH_ANY;
93 
94 		match.device_class = 0x3 << 16;
95 		match.device_class_mask = 0xff << 16;
96 
97 		match.match_data = 0;
98 
99 		iter = pci_id_match_iterator_create(&match);
100 		pci_dev = pci_device_next(iter);
101 		pci_iterator_destroy(iter);
102 	}
103 	igt_require_f(pci_dev, "Couldn't find Intel graphics card\n");
104 
105 	error = pci_device_probe(pci_dev);
106 	igt_fail_on_f(error != 0,
107 		      "Couldn't probe graphics card\n");
108 
109 	if (pci_dev->vendor_id != 0x8086)
110 		errx(1, "Graphics card is non-intel");
111 
112 	return pci_dev;
113 }
114 
115 /**
116  * intel_get_drm_devid:
117  * @fd: open i915 drm file descriptor
118  *
119  * Queries the kernel for the pci device id corresponding to the drm file
120  * descriptor.
121  *
122  * Returns:
123  * The devid, exits the program on any failures.
124  */
125 uint32_t
intel_get_drm_devid(int fd)126 intel_get_drm_devid(int fd)
127 {
128 	struct drm_i915_getparam gp;
129 	const char *override;
130 	int devid = 0;
131 
132 	igt_assert(is_i915_device(fd));
133 
134 	override = getenv("INTEL_DEVID_OVERRIDE");
135 	if (override)
136 		return strtol(override, NULL, 0);
137 
138 	memset(&gp, 0, sizeof(gp));
139 	gp.param = I915_PARAM_CHIPSET_ID;
140 	gp.value = &devid;
141 	ioctl(fd, DRM_IOCTL_I915_GETPARAM, &gp, sizeof(gp));
142 
143 	return devid;
144 }
145 
146 /**
147  * intel_check_pch:
148  *
149  * Detects the PCH chipset type of the running systems and fills in the results
150  * into the global #intel_pch variable.
151  */
152 void
intel_check_pch(void)153 intel_check_pch(void)
154 {
155 	struct pci_device *pch_dev;
156 
157 	pch_dev = pci_device_find_by_slot(0, 0, 31, 0);
158 	if (pch_dev == NULL)
159 		return;
160 
161 	if (pch_dev->vendor_id != 0x8086)
162 		return;
163 
164 	switch (pch_dev->device_id & 0xff00) {
165 	case 0x3b00:
166 		intel_pch = PCH_IBX;
167 		break;
168 	case 0x1c00:
169 	case 0x1e00:
170 		intel_pch = PCH_CPT;
171 		break;
172 	case 0x8c00:
173 	case 0x9c00:
174 		intel_pch = PCH_LPT;
175 		break;
176 	default:
177 		intel_pch = PCH_NONE;
178 		return;
179 	}
180 }
181