cb3951afa82eed7be9ed74a1abc3187e6d708afc
[mesa.git] / src / drm-shim / drm_shim.h
1 /*
2 * Copyright © 2018 Broadcom
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
24 #include <c11/threads.h>
25
26 #include "util/macros.h"
27 #include "util/hash_table.h"
28 #include "util/vma.h"
29
30 #include <xf86drm.h>
31
32 #ifdef __linux__
33 #define DRM_MAJOR 226
34 #endif
35
36 typedef int (*ioctl_fn_t)(int fd, unsigned long request, void *arg);
37
38 struct shim_bo;
39
40 struct shim_device {
41 /* Mapping from int fd to struct shim_fd *. */
42 struct hash_table *fd_map;
43
44 mtx_t mem_lock;
45 /* Heap from which shim_bo are allocated */
46 struct util_vma_heap mem_heap;
47
48 int mem_fd;
49
50 int (**driver_ioctls)(int fd, unsigned long request, void *arg);
51 int driver_ioctl_count;
52
53 void (*driver_bo_free)(struct shim_bo *bo);
54
55 /* Returned by drmGetVersion(). */
56 const char *driver_name;
57 int version_major, version_minor, version_patchlevel;
58 int bus_type;
59 };
60
61 extern struct shim_device shim_device;
62
63 struct shim_fd {
64 int fd;
65 mtx_t handle_lock;
66 /* mapping from int gem handle to struct shim_bo *. */
67 struct hash_table *handles;
68 };
69
70 struct shim_bo {
71 uint64_t mem_addr;
72 void *map;
73 int refcount;
74 uint32_t size;
75 };
76
77 /* Core support. */
78 extern int render_node_minor;
79 void drm_shim_device_init(void);
80 void drm_shim_override_file(const char *contents,
81 const char *path_format, ...) PRINTFLIKE(2, 3);
82 void drm_shim_fd_register(int fd, struct shim_fd *shim_fd);
83 struct shim_fd *drm_shim_fd_lookup(int fd);
84 int drm_shim_ioctl(int fd, unsigned long request, void *arg);
85 void *drm_shim_mmap(struct shim_fd *shim_fd, size_t length, int prot, int flags,
86 int fd, off_t offset);
87
88 void drm_shim_bo_init(struct shim_bo *bo, size_t size);
89 void drm_shim_bo_get(struct shim_bo *bo);
90 void drm_shim_bo_put(struct shim_bo *bo);
91 struct shim_bo *drm_shim_bo_lookup(struct shim_fd *shim_fd, int handle);
92 int drm_shim_bo_get_handle(struct shim_fd *shim_fd, struct shim_bo *bo);
93 uint64_t drm_shim_bo_get_mmap_offset(struct shim_fd *shim_fd,
94 struct shim_bo *bo);
95
96 /* driver-specific hooks. */
97 void drm_shim_driver_init(void);
98 extern bool drm_shim_driver_prefers_new_render_node;