1 /*
2 * Copyright © 2023 Google, Inc.
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 FROM,
20 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
21 * SOFTWARE.
22 */
23
24 /*
25 * A simple header that either gives you the real libdrm or a no-op shim,
26 * depending on whether HAVE_LIBDRM is defined. This is intended to avoid
27 * the proliferation of #ifdef'ery to support environments without libdrm.
28 */
29
30 #ifdef HAVE_LIBDRM
31 #include <xf86drm.h>
32 #else
33
34 #include <errno.h>
35 #include <stddef.h>
36 #include <stdint.h>
37 #include <sys/types.h>
38
39 #define DRM_NODE_PRIMARY 0
40 #define DRM_NODE_CONTROL 1
41 #define DRM_NODE_RENDER 2
42 #define DRM_NODE_MAX 3
43
44 #define DRM_BUS_PCI 0
45 #define DRM_BUS_USB 1
46 #define DRM_BUS_PLATFORM 2
47 #define DRM_BUS_HOST1X 3
48
49 typedef unsigned int drm_magic_t;
50
51 static int
drmGetMagic(int fd,drm_magic_t * magic)52 drmGetMagic(int fd, drm_magic_t * magic)
53 {
54 return -EINVAL;
55 }
56
57 typedef struct _drmPciDeviceInfo {
58 uint16_t vendor_id;
59 uint16_t device_id;
60 uint16_t subvendor_id;
61 uint16_t subdevice_id;
62 uint8_t revision_id;
63 } drmPciDeviceInfo, *drmPciDeviceInfoPtr;
64
65 #define DRM_PLATFORM_DEVICE_NAME_LEN 512
66
67 typedef struct _drmPlatformBusInfo {
68 char fullname[DRM_PLATFORM_DEVICE_NAME_LEN];
69 } drmPlatformBusInfo, *drmPlatformBusInfoPtr;
70
71 typedef struct _drmPlatformDeviceInfo {
72 char **compatible; /* NULL terminated list of compatible strings */
73 } drmPlatformDeviceInfo, *drmPlatformDeviceInfoPtr;
74
75 #define DRM_HOST1X_DEVICE_NAME_LEN 512
76
77 typedef struct _drmHost1xBusInfo {
78 char fullname[DRM_HOST1X_DEVICE_NAME_LEN];
79 } drmHost1xBusInfo, *drmHost1xBusInfoPtr;
80
81 typedef struct _drmPciBusInfo {
82 uint16_t domain;
83 uint8_t bus;
84 uint8_t dev;
85 uint8_t func;
86 } drmPciBusInfo, *drmPciBusInfoPtr;
87
88 typedef struct _drmDevice {
89 char **nodes; /* DRM_NODE_MAX sized array */
90 int available_nodes; /* DRM_NODE_* bitmask */
91 int bustype;
92 union {
93 drmPciBusInfoPtr pci;
94 drmPlatformBusInfoPtr platform;
95 drmHost1xBusInfoPtr host1x;
96 } businfo;
97 union {
98 drmPciDeviceInfoPtr pci;
99 } deviceinfo;
100 /* ... */
101 } drmDevice, *drmDevicePtr;
102
103 #define DRM_DEVICE_GET_PCI_REVISION (1 << 0)
104 static inline int
drmGetDevice2(int fd,uint32_t flags,drmDevicePtr * device)105 drmGetDevice2(int fd, uint32_t flags, drmDevicePtr *device)
106 {
107 return -ENOENT;
108 }
109
110 static inline int
drmGetDevices2(uint32_t flags,drmDevicePtr devices[],int max_devices)111 drmGetDevices2(uint32_t flags, drmDevicePtr devices[], int max_devices)
112 {
113 return -ENOENT;
114 }
115
116 static inline int
drmGetDeviceFromDevId(dev_t dev_id,uint32_t flags,drmDevicePtr * device)117 drmGetDeviceFromDevId(dev_t dev_id, uint32_t flags, drmDevicePtr *device)
118 {
119 return -ENOENT;
120 }
121
122 static inline void
drmFreeDevice(drmDevicePtr * device)123 drmFreeDevice(drmDevicePtr *device) {}
124
125 static inline void
drmFreeDevices(drmDevicePtr devices[],int count)126 drmFreeDevices(drmDevicePtr devices[], int count) {}
127
128 static inline char*
drmGetDeviceNameFromFd2(int fd)129 drmGetDeviceNameFromFd2(int fd) { return NULL;}
130
131 typedef struct _drmVersion {
132 int version_major; /**< Major version */
133 int version_minor; /**< Minor version */
134 int version_patchlevel; /**< Patch level */
135 int name_len; /**< Length of name buffer */
136 char *name; /**< Name of driver */
137 int date_len; /**< Length of date buffer */
138 char *date; /**< User-space buffer to hold date */
139 int desc_len; /**< Length of desc buffer */
140 char *desc; /**< User-space buffer to hold desc */
141 } drmVersion, *drmVersionPtr;
142
143 static inline struct _drmVersion *
drmGetVersion(int fd)144 drmGetVersion(int fd) { return NULL; }
145
146 static inline void
drmFreeVersion(struct _drmVersion * v)147 drmFreeVersion(struct _drmVersion *v) {}
148
149 #endif
150