src/broadcom/drm-shim/v3d_noop.c

   1 /*
   2  * Copyright © 2018 Broadcom
   3  *
   4  * Permission is hereby granted, free of charge, to any person obtaining a
   5  * copy of this software and associated documentation files (the "Software"),
   6  * to deal in the Software without restriction, including without limitation
   7  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
   8  * and/or sell copies of the Software, and to permit persons to whom the
   9  * Software is furnished to do so, subject to the following conditions:
  10  *
  11  * The above copyright notice and this permission notice (including the next
  12  * paragraph) shall be included in all copies or substantial portions of the
  13  * Software.
  14  *
  15  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  16  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  17  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
  18  * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  19  * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
  20  * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
  21  * DEALINGS IN THE SOFTWARE.
  22  */
  23
  24 #include <limits.h>
  25 #include <stdio.h>
  26 #include <stdlib.h>
  27 #include <sys/ioctl.h>
  28 #include "drm-uapi/v3d_drm.h"
  29 #include "drm-shim/drm_shim.h"
  30
  31 bool drm_shim_driver_prefers_first_render_node = true;
  32
  33 struct v3d_bo {
  34         struct shim_bo base;
  35         uint32_t offset;
  36 };
  37
  38 static struct v3d_bo *
  39 v3d_bo(struct shim_bo *bo)
  40 {
  41         return (struct v3d_bo *)bo;
  42 }
  43
  44 struct v3d_device {
  45         uint32_t next_offset;
  46 };
  47
  48 static struct v3d_device v3d = {
  49         .next_offset = 0x1000,
  50 };
  51
  52 static int
  53 v3d_ioctl_noop(int fd, unsigned long request, void *arg)
  54 {
  55         return 0;
  56 }
  57
  58 static int
  59 v3d_ioctl_create_bo(int fd, unsigned long request, void *arg)
  60 {
  61         struct shim_fd *shim_fd = drm_shim_fd_lookup(fd);
  62         struct drm_v3d_create_bo *create = arg;
  63         struct v3d_bo *bo = calloc(1, sizeof(*bo));
  64
  65         drm_shim_bo_init(&bo->base, create->size);
  66
  67         assert(UINT_MAX - v3d.next_offset > create->size);
  68         bo->offset = v3d.next_offset;
  69         v3d.next_offset += create->size;
  70
  71         create->offset = bo->offset;
  72         create->handle = drm_shim_bo_get_handle(shim_fd, &bo->base);
  73
  74         drm_shim_bo_put(&bo->base);
  75
  76         return 0;
  77 }
  78
  79 static int
  80 v3d_ioctl_get_bo_offset(int fd, unsigned long request, void *arg)
  81 {
  82         struct shim_fd *shim_fd = drm_shim_fd_lookup(fd);
  83         struct drm_v3d_get_bo_offset *args = arg;
  84         struct shim_bo *bo = drm_shim_bo_lookup(shim_fd, args->handle);
  85
  86         args->offset = v3d_bo(bo)->offset;
  87
  88         drm_shim_bo_put(bo);
  89
  90         return 0;
  91 }
  92
  93 static int
  94 v3d_ioctl_mmap_bo(int fd, unsigned long request, void *arg)
  95 {
  96         struct shim_fd *shim_fd = drm_shim_fd_lookup(fd);
  97         struct drm_v3d_mmap_bo *map = arg;
  98         struct shim_bo *bo = drm_shim_bo_lookup(shim_fd, map->handle);
  99
 100         map->offset = drm_shim_bo_get_mmap_offset(shim_fd, bo);
 101
 102         drm_shim_bo_put(bo);
 103
 104         return 0;
 105 }
 106
 107 static int
 108 v3d_ioctl_get_param(int fd, unsigned long request, void *arg)
 109 {
 110         struct drm_v3d_get_param *gp = arg;
 111         static const uint32_t v3d42_reg_map[] = {
 112                 [DRM_V3D_PARAM_V3D_UIFCFG] = 0x00000045,
 113                 [DRM_V3D_PARAM_V3D_HUB_IDENT1] = 0x000e1124,
 114                 [DRM_V3D_PARAM_V3D_HUB_IDENT2] = 0x00000100,
 115                 [DRM_V3D_PARAM_V3D_HUB_IDENT3] = 0x00000e00,
 116                 [DRM_V3D_PARAM_V3D_CORE0_IDENT0] = 0x04443356,
 117                 [DRM_V3D_PARAM_V3D_CORE0_IDENT1] = 0x81001422,
 118                 [DRM_V3D_PARAM_V3D_CORE0_IDENT2] = 0x40078121,
 119         };
 120
 121         switch (gp->param) {
 122         case DRM_V3D_PARAM_SUPPORTS_TFU:
 123                 gp->value = 1;
 124                 return 0;
 125         default:
 126                 break;
 127         }
 128
 129         if (gp->param < ARRAY_SIZE(v3d42_reg_map) && v3d42_reg_map[gp->param]) {
 130                 gp->value = v3d42_reg_map[gp->param];
 131                 return 0;
 132         }
 133
 134         fprintf(stderr, "Unknown DRM_IOCTL_V3D_GET_PARAM %d\n", gp->param);
 135         return -1;
 136 }
 137
 138 static ioctl_fn_t driver_ioctls[] = {
 139         [DRM_V3D_SUBMIT_CL] = v3d_ioctl_noop,
 140         [DRM_V3D_SUBMIT_TFU] = v3d_ioctl_noop,
 141         [DRM_V3D_WAIT_BO] = v3d_ioctl_noop,
 142         [DRM_V3D_CREATE_BO] = v3d_ioctl_create_bo,
 143         [DRM_V3D_GET_PARAM] = v3d_ioctl_get_param,
 144         [DRM_V3D_GET_BO_OFFSET] = v3d_ioctl_get_bo_offset,
 145         [DRM_V3D_MMAP_BO] = v3d_ioctl_mmap_bo,
 146 };
 147
 148 void
 149 drm_shim_driver_init(void)
 150 {
 151         shim_device.bus_type = DRM_BUS_PLATFORM;
 152         shim_device.driver_name = "v3d";
 153         shim_device.driver_ioctls = driver_ioctls;
 154         shim_device.driver_ioctl_count = ARRAY_SIZE(driver_ioctls);
 155
 156         drm_shim_override_file("OF_FULLNAME=/rdb/v3d\n"
 157                                "OF_COMPATIBLE_N=1\n"
 158                                "OF_COMPATIBLE_0=brcm,7278-v3d\n",
 159                                "/sys/dev/char/%d:%d/device/uevent",
 160                                DRM_MAJOR, render_node_minor);
 161 }