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/lima_drm.h"
30
31#include "util/u_math.h"
32
33bool drm_shim_driver_prefers_first_render_node = true;
34
35static int
36lima_ioctl_noop(int fd, unsigned long request, void *arg)
37{
38   return 0;
39}
40
41static int
42lima_ioctl_get_param(int fd, unsigned long request, void *arg)
43{
44   struct drm_lima_get_param *gp = arg;
45
46   switch (gp->param) {
47   case DRM_LIMA_PARAM_GPU_ID:
48      gp->value = DRM_LIMA_PARAM_GPU_ID_MALI450;
49      return 0;
50   case DRM_LIMA_PARAM_NUM_PP:
51      gp->value = 6;
52      return 0;
53   default:
54      fprintf(stderr, "Unknown DRM_IOCTL_LIMA_GET_PARAM %d\n", gp->param);
55      return -1;
56   }
57}
58
59static int
60lima_ioctl_gem_create(int fd, unsigned long request, void *arg)
61{
62   struct drm_lima_gem_create *create = arg;
63
64   struct shim_fd *shim_fd = drm_shim_fd_lookup(fd);
65   struct shim_bo *bo = calloc(1, sizeof(*bo));
66   size_t size = ALIGN(create->size, 4096);
67
68   drm_shim_bo_init(bo, size);
69
70   create->handle = drm_shim_bo_get_handle(shim_fd, bo);
71
72   drm_shim_bo_put(bo);
73
74   return 0;
75}
76
77static int
78lima_ioctl_gem_info(int fd, unsigned long request, void *arg)
79{
80   struct drm_lima_gem_info *gem_info = arg;
81
82   struct shim_fd *shim_fd = drm_shim_fd_lookup(fd);
83   struct shim_bo *bo = drm_shim_bo_lookup(shim_fd, gem_info->handle);
84
85   gem_info->va = bo->mem_addr;
86   gem_info->offset = drm_shim_bo_get_mmap_offset(shim_fd, bo);
87
88   return 0;
89}
90
91static ioctl_fn_t driver_ioctls[] = {
92   [DRM_LIMA_GET_PARAM] = lima_ioctl_get_param,
93   [DRM_LIMA_GEM_CREATE] = lima_ioctl_gem_create,
94   [DRM_LIMA_GEM_INFO] = lima_ioctl_gem_info,
95   [DRM_LIMA_GEM_SUBMIT] = lima_ioctl_noop,
96   [DRM_LIMA_GEM_WAIT] = lima_ioctl_noop,
97   [DRM_LIMA_CTX_CREATE] = lima_ioctl_noop,
98   [DRM_LIMA_CTX_FREE] = lima_ioctl_noop,
99};
100
101void
102drm_shim_driver_init(void)
103{
104   shim_device.bus_type = DRM_BUS_PLATFORM;
105   shim_device.driver_name = "lima";
106   shim_device.driver_ioctls = driver_ioctls;
107   shim_device.driver_ioctl_count = ARRAY_SIZE(driver_ioctls);
108
109   /* lima uses the DRM version to expose features, instead of getparam. */
110   shim_device.version_major = 1;
111   shim_device.version_minor = 1;
112   shim_device.version_patchlevel = 0;
113
114   drm_shim_override_file("DRIVER=lima\n"
115                          "OF_FULLNAME=/soc/mali\n"
116                          "OF_COMPATIBLE_0=arm,mali-450\n"
117                          "OF_COMPATIBLE_N=1\n",
118                          "/sys/dev/char/%d:%d/device/uevent", DRM_MAJOR,
119                          render_node_minor);
120}
121