1 /*
2 * Copyright (c) 2021 Etnaviv Project
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 <limits.h>
25 #include <stdio.h>
26 #include <stdlib.h>
27 #include <sys/ioctl.h>
28 #include "drm-uapi/vc4_drm.h"
29 #include "drm-shim/drm_shim.h"
30
31 bool drm_shim_driver_prefers_first_render_node = true;
32
33 static int
vc4_ioctl_noop(int fd,unsigned long request,void * arg)34 vc4_ioctl_noop(int fd, unsigned long request, void *arg)
35 {
36 return 0;
37 }
38
39 static int
vc4_ioctl_create_bo(int fd,unsigned long request,void * arg)40 vc4_ioctl_create_bo(int fd, unsigned long request, void *arg)
41 {
42 struct shim_fd *shim_fd = drm_shim_fd_lookup(fd);
43 struct drm_vc4_create_bo *create = arg;
44 struct shim_bo *bo = calloc(1, sizeof(*bo));
45
46 drm_shim_bo_init(bo, create->size);
47 create->handle = drm_shim_bo_get_handle(shim_fd, bo);
48 drm_shim_bo_put(bo);
49
50 return 0;
51 }
52
53 static int
vc4_ioctl_create_shader_bo(int fd,unsigned long request,void * arg)54 vc4_ioctl_create_shader_bo(int fd, unsigned long request, void *arg)
55 {
56 struct shim_fd *shim_fd = drm_shim_fd_lookup(fd);
57 struct drm_vc4_create_shader_bo *create = arg;
58 struct shim_bo *bo = calloc(1, sizeof(*bo));
59
60 drm_shim_bo_init(bo, create->size);
61 create->handle = drm_shim_bo_get_handle(shim_fd, bo);
62 drm_shim_bo_put(bo);
63
64 return 0;
65 }
66
67 static int
vc4_ioctl_mmap_bo(int fd,unsigned long request,void * arg)68 vc4_ioctl_mmap_bo(int fd, unsigned long request, void *arg)
69 {
70 struct shim_fd *shim_fd = drm_shim_fd_lookup(fd);
71 struct drm_vc4_mmap_bo *map = arg;
72 struct shim_bo *bo = drm_shim_bo_lookup(shim_fd, map->handle);
73
74 map->offset = drm_shim_bo_get_mmap_offset(shim_fd, bo);
75
76 drm_shim_bo_put(bo);
77
78 return 0;
79 }
80
81 static int
vc4_ioctl_get_param(int fd,unsigned long request,void * arg)82 vc4_ioctl_get_param(int fd, unsigned long request, void *arg)
83 {
84 struct drm_vc4_get_param *gp = arg;
85 static const uint32_t param_map[] = {
86 [DRM_VC4_PARAM_V3D_IDENT0] = 0x2000000,
87 [DRM_VC4_PARAM_V3D_IDENT1] = 0x0000001,
88 };
89
90 switch (gp->param) {
91 case DRM_VC4_PARAM_SUPPORTS_BRANCHES:
92 case DRM_VC4_PARAM_SUPPORTS_ETC1:
93 case DRM_VC4_PARAM_SUPPORTS_THREADED_FS:
94 case DRM_VC4_PARAM_SUPPORTS_FIXED_RCL_ORDER:
95 gp->value = 1;
96 return 0;
97
98 case DRM_VC4_PARAM_SUPPORTS_MADVISE:
99 case DRM_VC4_PARAM_SUPPORTS_PERFMON:
100 gp->value = 0;
101 return 0;
102
103 default:
104 break;
105 }
106
107 if (gp->param < ARRAY_SIZE(param_map) && param_map[gp->param]) {
108 gp->value = param_map[gp->param];
109 return 0;
110 }
111
112 fprintf(stderr, "Unknown DRM_IOCTL_VC4_GET_PARAM %d\n", gp->param);
113 return -1;
114 }
115
116 static ioctl_fn_t driver_ioctls[] = {
117 [DRM_VC4_CREATE_BO] = vc4_ioctl_create_bo,
118 [DRM_VC4_CREATE_SHADER_BO] = vc4_ioctl_create_shader_bo,
119 [DRM_VC4_MMAP_BO] = vc4_ioctl_mmap_bo,
120 [DRM_VC4_GET_PARAM] = vc4_ioctl_get_param,
121 [DRM_VC4_GET_TILING] = vc4_ioctl_noop,
122 [DRM_VC4_LABEL_BO] = vc4_ioctl_noop,
123 };
124
125 void
drm_shim_driver_init(void)126 drm_shim_driver_init(void)
127 {
128 shim_device.bus_type = DRM_BUS_PLATFORM;
129 shim_device.driver_name = "vc4";
130 shim_device.driver_ioctls = driver_ioctls;
131 shim_device.driver_ioctl_count = ARRAY_SIZE(driver_ioctls);
132
133 drm_shim_override_file("OF_FULLNAME=/rdb/vc4\n"
134 "OF_COMPATIBLE_N=1\n"
135 "OF_COMPATIBLE_0=brcm,7278-vc4\n",
136 "/sys/dev/char/%d:%d/device/uevent",
137 DRM_MAJOR, render_node_minor);
138 }
139