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_mmap_bo(int fd,unsigned long request,void * arg)54 vc4_ioctl_mmap_bo(int fd, unsigned long request, void *arg)
55 {
56 struct shim_fd *shim_fd = drm_shim_fd_lookup(fd);
57 struct drm_vc4_mmap_bo *map = arg;
58 struct shim_bo *bo = drm_shim_bo_lookup(shim_fd, map->handle);
59
60 map->offset = drm_shim_bo_get_mmap_offset(shim_fd, bo);
61
62 drm_shim_bo_put(bo);
63
64 return 0;
65 }
66
67 static int
vc4_ioctl_get_param(int fd,unsigned long request,void * arg)68 vc4_ioctl_get_param(int fd, unsigned long request, void *arg)
69 {
70 struct drm_vc4_get_param *gp = arg;
71 static const uint32_t param_map[] = {
72 [DRM_VC4_PARAM_V3D_IDENT0] = 0x2000000,
73 [DRM_VC4_PARAM_V3D_IDENT1] = 0x0000001,
74 };
75
76 switch (gp->param) {
77 case DRM_VC4_PARAM_SUPPORTS_BRANCHES:
78 case DRM_VC4_PARAM_SUPPORTS_ETC1:
79 case DRM_VC4_PARAM_SUPPORTS_THREADED_FS:
80 case DRM_VC4_PARAM_SUPPORTS_FIXED_RCL_ORDER:
81 gp->value = 1;
82 return 0;
83
84 case DRM_VC4_PARAM_SUPPORTS_MADVISE:
85 case DRM_VC4_PARAM_SUPPORTS_PERFMON:
86 gp->value = 0;
87 return 0;
88
89 default:
90 break;
91 }
92
93 if (gp->param < ARRAY_SIZE(param_map) && param_map[gp->param]) {
94 gp->value = param_map[gp->param];
95 return 0;
96 }
97
98 fprintf(stderr, "Unknown DRM_IOCTL_VC4_GET_PARAM %d\n", gp->param);
99 return -1;
100 }
101
102 static ioctl_fn_t driver_ioctls[] = {
103 [DRM_VC4_CREATE_BO] = vc4_ioctl_create_bo,
104 [DRM_VC4_MMAP_BO] = vc4_ioctl_mmap_bo,
105 [DRM_VC4_GET_PARAM] = vc4_ioctl_get_param,
106 [DRM_VC4_GET_TILING] = vc4_ioctl_noop,
107 [DRM_VC4_LABEL_BO] = vc4_ioctl_noop,
108 };
109
110 void
drm_shim_driver_init(void)111 drm_shim_driver_init(void)
112 {
113 shim_device.bus_type = DRM_BUS_PLATFORM;
114 shim_device.driver_name = "vc4";
115 shim_device.driver_ioctls = driver_ioctls;
116 shim_device.driver_ioctl_count = ARRAY_SIZE(driver_ioctls);
117
118 drm_shim_override_file("OF_FULLNAME=/rdb/vc4\n"
119 "OF_COMPATIBLE_N=1\n"
120 "OF_COMPATIBLE_0=brcm,7278-vc4\n",
121 "/sys/dev/char/%d:%d/device/uevent",
122 DRM_MAJOR, render_node_minor);
123 }
124