1 /*
2 * Copyright (C) 2021 Icecream95
3 * Copyright (C) 2019 Google LLC
4 *
5 * Permission is hereby granted, free of charge, to any person obtaining a
6 * copy of this software and associated documentation files (the "Software"),
7 * to deal in the Software without restriction, including without limitation
8 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
9 * and/or sell copies of the Software, and to permit persons to whom the
10 * Software is furnished to do so, subject to the following conditions:
11 *
12 * The above copyright notice and this permission notice (including the next
13 * paragraph) shall be included in all copies or substantial portions of the
14 * Software.
15 *
16 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
17 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
18 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
19 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
20 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
21 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
22 * DEALINGS IN THE SOFTWARE.
23 */
24
25 #include <limits.h>
26 #include <stdio.h>
27 #include <stdlib.h>
28 #include "drm-shim/drm_shim.h"
29 #include "drm-uapi/panfrost_drm.h"
30
31 #include "util/u_math.h"
32
33 /* Default GPU ID if PAN_GPU_ID is not set. This defaults to Mali-G52. */
34 #define PAN_GPU_ID_DEFAULT (0x7212)
35
36 bool drm_shim_driver_prefers_first_render_node = true;
37
38 static int
pan_ioctl_noop(int fd, unsigned long request, void *arg)39 pan_ioctl_noop(int fd, unsigned long request, void *arg)
40 {
41 return 0;
42 }
43
44 static int
pan_ioctl_get_param(int fd, unsigned long request, void *arg)45 pan_ioctl_get_param(int fd, unsigned long request, void *arg)
46 {
47 struct drm_panfrost_get_param *gp = arg;
48
49 switch (gp->param) {
50 case DRM_PANFROST_PARAM_GPU_PROD_ID:
51 {
52 char *override_version = getenv("PAN_GPU_ID");
53
54 if (override_version)
55 gp->value = strtol(override_version, NULL, 16);
56 else
57 gp->value = PAN_GPU_ID_DEFAULT;
58
59 return 0;
60 }
61
62 case DRM_PANFROST_PARAM_SHADER_PRESENT:
63 /* Assume an MP4 GPU */
64 gp->value = 0xF;
65 return 0;
66 case DRM_PANFROST_PARAM_TILER_FEATURES:
67 gp->value = 0x809;
68 return 0;
69 case DRM_PANFROST_PARAM_TEXTURE_FEATURES0:
70 case DRM_PANFROST_PARAM_TEXTURE_FEATURES1:
71 /* Allow all compressed textures */
72 gp->value = ~0;
73 return 0;
74 case DRM_PANFROST_PARAM_GPU_REVISION:
75 case DRM_PANFROST_PARAM_THREAD_TLS_ALLOC:
76 case DRM_PANFROST_PARAM_AFBC_FEATURES:
77 gp->value = 0;
78 return 0;
79 default:
80 fprintf(stderr, "Unknown DRM_IOCTL_PANFROST_GET_PARAM %d\n", gp->param);
81 return -1;
82 }
83 }
84
85 static int
pan_ioctl_create_bo(int fd, unsigned long request, void *arg)86 pan_ioctl_create_bo(int fd, unsigned long request, void *arg)
87 {
88 struct drm_panfrost_create_bo *create = arg;
89
90 struct shim_fd *shim_fd = drm_shim_fd_lookup(fd);
91 struct shim_bo *bo = calloc(1, sizeof(*bo));
92 size_t size = ALIGN(create->size, 4096);
93
94 drm_shim_bo_init(bo, size);
95
96 create->handle = drm_shim_bo_get_handle(shim_fd, bo);
97 create->offset = bo->mem_addr;
98
99 drm_shim_bo_put(bo);
100
101 return 0;
102 }
103
104 static int
pan_ioctl_mmap_bo(int fd, unsigned long request, void *arg)105 pan_ioctl_mmap_bo(int fd, unsigned long request, void *arg)
106 {
107 struct drm_panfrost_mmap_bo *mmap_bo = arg;
108
109 struct shim_fd *shim_fd = drm_shim_fd_lookup(fd);
110 struct shim_bo *bo = drm_shim_bo_lookup(shim_fd, mmap_bo->handle);
111
112 mmap_bo->offset = drm_shim_bo_get_mmap_offset(shim_fd, bo);
113
114 return 0;
115 }
116
117 static int
pan_ioctl_madvise(int fd, unsigned long request, void *arg)118 pan_ioctl_madvise(int fd, unsigned long request, void *arg)
119 {
120 struct drm_panfrost_madvise *madvise = arg;
121
122 madvise->retained = 1;
123
124 return 0;
125 }
126
127 static ioctl_fn_t driver_ioctls[] = {
128 [DRM_PANFROST_SUBMIT] = pan_ioctl_noop,
129 [DRM_PANFROST_WAIT_BO] = pan_ioctl_noop,
130 [DRM_PANFROST_CREATE_BO] = pan_ioctl_create_bo,
131 [DRM_PANFROST_MMAP_BO] = pan_ioctl_mmap_bo,
132 [DRM_PANFROST_GET_PARAM] = pan_ioctl_get_param,
133 [DRM_PANFROST_GET_BO_OFFSET] = pan_ioctl_noop,
134 [DRM_PANFROST_PERFCNT_ENABLE] = pan_ioctl_noop,
135 [DRM_PANFROST_PERFCNT_DUMP] = pan_ioctl_noop,
136 [DRM_PANFROST_MADVISE] = pan_ioctl_madvise,
137 };
138
139 void
drm_shim_driver_init(void)140 drm_shim_driver_init(void)
141 {
142 shim_device.bus_type = DRM_BUS_PLATFORM;
143 shim_device.driver_name = "panfrost";
144 shim_device.driver_ioctls = driver_ioctls;
145 shim_device.driver_ioctl_count = ARRAY_SIZE(driver_ioctls);
146
147 /* panfrost uses the DRM version to expose features, instead of getparam. */
148 shim_device.version_major = 1;
149 shim_device.version_minor = 1;
150 shim_device.version_patchlevel = 0;
151
152 drm_shim_override_file("DRIVER=panfrost\n"
153 "OF_FULLNAME=/soc/mali\n"
154 "OF_COMPATIBLE_0=arm,mali-t860\n"
155 "OF_COMPATIBLE_N=1\n",
156 "/sys/dev/char/%d:%d/device/uevent", DRM_MAJOR,
157 render_node_minor);
158 }
159