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
36bool drm_shim_driver_prefers_first_render_node = true;
37
38static int
39pan_ioctl_noop(int fd, unsigned long request, void *arg)
40{
41   return 0;
42}
43
44static int
45pan_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
85static int
86pan_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
104static int
105pan_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
117static int
118pan_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
127static 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
139void
140drm_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