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 bool drm_shim_driver_prefers_first_render_node = true;
34
35 static int
pan_ioctl_noop(int fd,unsigned long request,void * arg)36 pan_ioctl_noop(int fd, unsigned long request, void *arg)
37 {
38 return 0;
39 }
40
41 static int
pan_ioctl_get_param(int fd,unsigned long request,void * arg)42 pan_ioctl_get_param(int fd, unsigned long request, void *arg)
43 {
44 struct drm_panfrost_get_param *gp = arg;
45
46 switch (gp->param) {
47 case DRM_PANFROST_PARAM_GPU_PROD_ID:
48 /* Other GPUs can be set using PAN_GPU_ID */
49 gp->value = 0x860;
50 return 0;
51 case DRM_PANFROST_PARAM_GPU_REVISION:
52 gp->value = 0;
53 return 0;
54 case DRM_PANFROST_PARAM_SHADER_PRESENT:
55 /* Assume an MP4 GPU */
56 gp->value = 0xF;
57 return 0;
58 case DRM_PANFROST_PARAM_TEXTURE_FEATURES0:
59 gp->value = 0;
60 return 0;
61 case DRM_PANFROST_PARAM_THREAD_TLS_ALLOC:
62 gp->value = 0;
63 return 0;
64 case DRM_PANFROST_PARAM_TILER_FEATURES:
65 gp->value = 0x809;
66 return 0;
67 default:
68 fprintf(stderr, "Unknown DRM_IOCTL_PANFROST_GET_PARAM %d\n", gp->param);
69 return -1;
70 }
71 }
72
73 static int
pan_ioctl_create_bo(int fd,unsigned long request,void * arg)74 pan_ioctl_create_bo(int fd, unsigned long request, void *arg)
75 {
76 struct drm_panfrost_create_bo *create = arg;
77
78 struct shim_fd *shim_fd = drm_shim_fd_lookup(fd);
79 struct shim_bo *bo = calloc(1, sizeof(*bo));
80 size_t size = ALIGN(create->size, 4096);
81
82 drm_shim_bo_init(bo, size);
83
84 create->handle = drm_shim_bo_get_handle(shim_fd, bo);
85 create->offset = bo->mem_addr;
86
87 drm_shim_bo_put(bo);
88
89 return 0;
90 }
91
92 static int
pan_ioctl_mmap_bo(int fd,unsigned long request,void * arg)93 pan_ioctl_mmap_bo(int fd, unsigned long request, void *arg)
94 {
95 struct drm_panfrost_mmap_bo *mmap_bo = arg;
96
97 struct shim_fd *shim_fd = drm_shim_fd_lookup(fd);
98 struct shim_bo *bo = drm_shim_bo_lookup(shim_fd, mmap_bo->handle);
99
100 mmap_bo->offset = drm_shim_bo_get_mmap_offset(shim_fd, bo);
101
102 return 0;
103 }
104
105 static int
pan_ioctl_madvise(int fd,unsigned long request,void * arg)106 pan_ioctl_madvise(int fd, unsigned long request, void *arg)
107 {
108 struct drm_panfrost_madvise *madvise = arg;
109
110 madvise->retained = 1;
111
112 return 0;
113 }
114
115 static ioctl_fn_t driver_ioctls[] = {
116 [DRM_PANFROST_SUBMIT] = pan_ioctl_noop,
117 [DRM_PANFROST_WAIT_BO] = pan_ioctl_noop,
118 [DRM_PANFROST_CREATE_BO] = pan_ioctl_create_bo,
119 [DRM_PANFROST_MMAP_BO] = pan_ioctl_mmap_bo,
120 [DRM_PANFROST_GET_PARAM] = pan_ioctl_get_param,
121 [DRM_PANFROST_GET_BO_OFFSET] = pan_ioctl_noop,
122 [DRM_PANFROST_PERFCNT_ENABLE] = pan_ioctl_noop,
123 [DRM_PANFROST_PERFCNT_DUMP] = pan_ioctl_noop,
124 [DRM_PANFROST_MADVISE] = pan_ioctl_madvise,
125 };
126
127 void
drm_shim_driver_init(void)128 drm_shim_driver_init(void)
129 {
130 shim_device.bus_type = DRM_BUS_PLATFORM;
131 shim_device.driver_name = "panfrost";
132 shim_device.driver_ioctls = driver_ioctls;
133 shim_device.driver_ioctl_count = ARRAY_SIZE(driver_ioctls);
134
135 /* panfrost uses the DRM version to expose features, instead of getparam. */
136 shim_device.version_major = 1;
137 shim_device.version_minor = 1;
138 shim_device.version_patchlevel = 0;
139
140 drm_shim_override_file("DRIVER=panfrost\n"
141 "OF_FULLNAME=/soc/mali\n"
142 "OF_COMPATIBLE_0=arm,mali-t860\n"
143 "OF_COMPATIBLE_N=1\n",
144 "/sys/dev/char/%d:%d/device/uevent", DRM_MAJOR,
145 render_node_minor);
146 }
147