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
33bool drm_shim_driver_prefers_first_render_node = true;
34
35static int
36pan_ioctl_noop(int fd, unsigned long request, void *arg)
37{
38   return 0;
39}
40
41static int
42pan_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
73static int
74pan_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
92static int
93pan_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
105static int
106pan_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
115static 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
127void
128drm_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