1 | /* $Id: vbox_fb.c 82968 2020-02-04 10:35:17Z vboxsync $ */
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2 | /** @file
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3 | * VirtualBox Additions Linux kernel video driver
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4 | */
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5 |
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6 | /*
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7 | * Copyright (C) 2013-2020 Oracle Corporation
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8 | * This file is based on ast_fb.c
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9 | * Copyright 2012 Red Hat Inc.
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10 | *
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11 | * Permission is hereby granted, free of charge, to any person obtaining a
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12 | * copy of this software and associated documentation files (the
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13 | * "Software"), to deal in the Software without restriction, including
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14 | * without limitation the rights to use, copy, modify, merge, publish,
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15 | * distribute, sub license, and/or sell copies of the Software, and to
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16 | * permit persons to whom the Software is furnished to do so, subject to
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17 | * the following conditions:
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18 | *
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19 | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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20 | * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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21 | * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL
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22 | * THE COPYRIGHT HOLDERS, AUTHORS AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM,
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23 | * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
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24 | * OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
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25 | * USE OR OTHER DEALINGS IN THE SOFTWARE.
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26 | *
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27 | * The above copyright notice and this permission notice (including the
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28 | * next paragraph) shall be included in all copies or substantial portions
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29 | * of the Software.
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30 | *
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31 | * Authors: Dave Airlie <[email protected]>
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32 | * Michael Thayer <[email protected],
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33 | */
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34 | #include <linux/module.h>
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35 | #include <linux/kernel.h>
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36 | #include <linux/errno.h>
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37 | #include <linux/string.h>
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38 | #include <linux/mm.h>
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39 | #include <linux/tty.h>
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40 | #include <linux/sysrq.h>
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41 | #include <linux/delay.h>
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42 | #include <linux/fb.h>
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43 | #include <linux/init.h>
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44 |
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45 | #include <drm/drmP.h>
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46 | #include <drm/drm_crtc.h>
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47 | #include <drm/drm_fb_helper.h>
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48 | #include <drm/drm_crtc_helper.h>
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49 |
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50 | #include "vbox_drv.h"
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51 | #include <VBoxVideo.h>
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52 |
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53 | #if LINUX_VERSION_CODE < KERNEL_VERSION(4, 7, 0) && !defined(RHEL_74)
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54 | /**
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55 | * Tell the host about dirty rectangles to update.
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56 | */
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57 | static void vbox_dirty_update(struct vbox_fbdev *fbdev,
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58 | int x, int y, int width, int height)
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59 | {
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60 | struct drm_gem_object *obj;
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61 | struct vbox_bo *bo;
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62 | int ret = -EBUSY;
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63 | bool store_for_later = false;
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64 | int x2, y2;
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65 | unsigned long flags;
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66 | struct drm_clip_rect rect;
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67 |
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68 | obj = fbdev->afb.obj;
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69 | bo = gem_to_vbox_bo(obj);
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70 |
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71 | /*
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72 | * try and reserve the BO, if we fail with busy
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73 | * then the BO is being moved and we should
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74 | * store up the damage until later.
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75 | */
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76 | if (drm_can_sleep())
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77 | ret = vbox_bo_reserve(bo, true);
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78 | if (ret) {
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79 | if (ret != -EBUSY)
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80 | return;
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81 |
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82 | store_for_later = true;
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83 | }
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84 |
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85 | x2 = x + width - 1;
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86 | y2 = y + height - 1;
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87 | spin_lock_irqsave(&fbdev->dirty_lock, flags);
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88 |
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89 | if (fbdev->y1 < y)
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90 | y = fbdev->y1;
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91 | if (fbdev->y2 > y2)
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92 | y2 = fbdev->y2;
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93 | if (fbdev->x1 < x)
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94 | x = fbdev->x1;
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95 | if (fbdev->x2 > x2)
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96 | x2 = fbdev->x2;
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97 |
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98 | if (store_for_later) {
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99 | fbdev->x1 = x;
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100 | fbdev->x2 = x2;
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101 | fbdev->y1 = y;
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102 | fbdev->y2 = y2;
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103 | spin_unlock_irqrestore(&fbdev->dirty_lock, flags);
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104 | return;
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105 | }
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106 |
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107 | fbdev->x1 = INT_MAX;
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108 | fbdev->y1 = INT_MAX;
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109 | fbdev->x2 = 0;
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110 | fbdev->y2 = 0;
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111 |
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112 | spin_unlock_irqrestore(&fbdev->dirty_lock, flags);
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113 |
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114 | /*
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115 | * Not sure why the original code subtracted 1 here, but I will keep
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116 | * it that way to avoid unnecessary differences.
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117 | */
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118 | rect.x1 = x;
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119 | rect.x2 = x2 + 1;
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120 | rect.y1 = y;
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121 | rect.y2 = y2 + 1;
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122 | vbox_framebuffer_dirty_rectangles(&fbdev->afb.base, &rect, 1);
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123 |
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124 | vbox_bo_unreserve(bo);
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125 | }
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126 | #endif
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127 |
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128 | #ifdef CONFIG_FB_DEFERRED_IO
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129 | # if LINUX_VERSION_CODE < KERNEL_VERSION(4, 7, 0) && !defined(RHEL_74)
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130 | static void drm_fb_helper_deferred_io(struct fb_info *info, struct list_head *pagelist)
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131 | {
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132 | struct vbox_fbdev *fbdev = info->par;
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133 | unsigned long start, end, min, max;
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134 | struct page *page;
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135 | int y1, y2;
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136 |
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137 | min = ULONG_MAX;
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138 | max = 0;
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139 | list_for_each_entry(page, pagelist, lru) {
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140 | start = page->index << PAGE_SHIFT;
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141 | end = start + PAGE_SIZE - 1;
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142 | min = min(min, start);
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143 | max = max(max, end);
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144 | }
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145 |
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146 | if (min < max) {
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147 | y1 = min / info->fix.line_length;
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148 | y2 = (max / info->fix.line_length) + 1;
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149 | DRM_INFO("%s: Calling dirty update: 0, %d, %d, %d\n",
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150 | __func__, y1, info->var.xres, y2 - y1 - 1);
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151 | vbox_dirty_update(fbdev, 0, y1, info->var.xres, y2 - y1 - 1);
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152 | }
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153 | }
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154 | # endif
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155 |
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156 | static struct fb_deferred_io vbox_defio = {
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157 | .delay = HZ / 30,
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158 | .deferred_io = drm_fb_helper_deferred_io,
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159 | };
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160 | #endif
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161 |
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162 | #if LINUX_VERSION_CODE < KERNEL_VERSION(4, 3, 0) && !defined(RHEL_73)
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163 | static void drm_fb_helper_sys_fillrect(struct fb_info *info, const struct fb_fillrect *rect)
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164 | {
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165 | struct vbox_fbdev *fbdev = info->par;
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166 |
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167 | sys_fillrect(info, rect);
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168 | vbox_dirty_update(fbdev, rect->dx, rect->dy, rect->width, rect->height);
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169 | }
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170 |
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171 | static void drm_fb_helper_sys_copyarea(struct fb_info *info, const struct fb_copyarea *area)
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172 | {
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173 | struct vbox_fbdev *fbdev = info->par;
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174 |
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175 | sys_copyarea(info, area);
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176 | vbox_dirty_update(fbdev, area->dx, area->dy, area->width, area->height);
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177 | }
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178 |
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179 | static void drm_fb_helper_sys_imageblit(struct fb_info *info, const struct fb_image *image)
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180 | {
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181 | struct vbox_fbdev *fbdev = info->par;
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182 |
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183 | sys_imageblit(info, image);
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184 | vbox_dirty_update(fbdev, image->dx, image->dy, image->width,
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185 | image->height);
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186 | }
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187 | #endif
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188 |
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189 | static struct fb_ops vboxfb_ops = {
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190 | .owner = THIS_MODULE,
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191 | .fb_check_var = drm_fb_helper_check_var,
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192 | .fb_set_par = drm_fb_helper_set_par,
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193 | .fb_fillrect = drm_fb_helper_sys_fillrect,
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194 | .fb_copyarea = drm_fb_helper_sys_copyarea,
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195 | .fb_imageblit = drm_fb_helper_sys_imageblit,
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196 | .fb_pan_display = drm_fb_helper_pan_display,
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197 | .fb_blank = drm_fb_helper_blank,
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198 | .fb_setcmap = drm_fb_helper_setcmap,
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199 | .fb_debug_enter = drm_fb_helper_debug_enter,
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200 | .fb_debug_leave = drm_fb_helper_debug_leave,
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201 | };
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202 |
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203 | static int vboxfb_create_object(struct vbox_fbdev *fbdev,
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204 | struct DRM_MODE_FB_CMD *mode_cmd,
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205 | struct drm_gem_object **gobj_p)
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206 | {
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207 | struct drm_device *dev = fbdev->helper.dev;
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208 | u32 size;
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209 | struct drm_gem_object *gobj;
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210 | #if LINUX_VERSION_CODE < KERNEL_VERSION(3, 3, 0)
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211 | u32 pitch = mode_cmd->pitch;
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212 | #else
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213 | u32 pitch = mode_cmd->pitches[0];
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214 | #endif
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215 |
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216 | int ret;
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217 |
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218 | size = pitch * mode_cmd->height;
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219 | ret = vbox_gem_create(dev, size, true, &gobj);
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220 | if (ret)
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221 | return ret;
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222 |
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223 | *gobj_p = gobj;
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224 |
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225 | return 0;
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226 | }
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227 |
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228 | #if LINUX_VERSION_CODE < KERNEL_VERSION(4, 3, 0) && !defined(RHEL_73)
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229 | static struct fb_info *drm_fb_helper_alloc_fbi(struct drm_fb_helper *helper)
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230 | {
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231 | struct fb_info *info;
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232 | struct vbox_fbdev *fbdev =
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233 | container_of(helper, struct vbox_fbdev, helper);
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234 | struct drm_device *dev = fbdev->helper.dev;
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235 | struct device *device = &dev->pdev->dev;
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236 |
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237 | info = framebuffer_alloc(0, device);
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238 | if (!info)
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239 | return ERR_PTR(-ENOMEM);
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240 | fbdev->helper.fbdev = info;
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241 |
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242 | if (fb_alloc_cmap(&info->cmap, 256, 0))
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243 | return ERR_PTR(-ENOMEM);
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244 |
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245 | info->apertures = alloc_apertures(1);
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246 | if (!info->apertures)
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247 | return ERR_PTR(-ENOMEM);
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248 |
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249 | return info;
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250 | }
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251 | #endif
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252 |
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253 | static int vboxfb_create(struct drm_fb_helper *helper,
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254 | struct drm_fb_helper_surface_size *sizes)
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255 | {
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256 | struct vbox_fbdev *fbdev =
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257 | container_of(helper, struct vbox_fbdev, helper);
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258 | struct drm_device *dev = fbdev->helper.dev;
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259 | struct DRM_MODE_FB_CMD mode_cmd;
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260 | struct drm_framebuffer *fb;
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261 | struct fb_info *info;
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262 | struct drm_gem_object *gobj;
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263 | struct vbox_bo *bo;
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264 | int size, ret;
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265 | u32 pitch;
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266 |
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267 | mode_cmd.width = sizes->surface_width;
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268 | mode_cmd.height = sizes->surface_height;
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269 | pitch = mode_cmd.width * ((sizes->surface_bpp + 7) / 8);
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270 | #if LINUX_VERSION_CODE < KERNEL_VERSION(3, 3, 0)
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271 | mode_cmd.bpp = sizes->surface_bpp;
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272 | mode_cmd.depth = sizes->surface_depth;
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273 | mode_cmd.pitch = pitch;
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274 | #else
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275 | mode_cmd.pixel_format = drm_mode_legacy_fb_format(sizes->surface_bpp,
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276 | sizes->surface_depth);
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277 | mode_cmd.pitches[0] = pitch;
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278 | #endif
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279 |
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280 | size = pitch * mode_cmd.height;
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281 |
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282 | ret = vboxfb_create_object(fbdev, &mode_cmd, &gobj);
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283 | if (ret) {
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284 | DRM_ERROR("failed to create fbcon backing object %d\n", ret);
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285 | return ret;
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286 | }
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287 |
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288 | ret = vbox_framebuffer_init(dev, &fbdev->afb, &mode_cmd, gobj);
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289 | if (ret)
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290 | return ret;
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291 |
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292 | bo = gem_to_vbox_bo(gobj);
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293 |
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294 | ret = vbox_bo_reserve(bo, false);
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295 | if (ret)
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296 | return ret;
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297 |
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298 | ret = vbox_bo_pin(bo, TTM_PL_FLAG_VRAM, NULL);
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299 | if (ret) {
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300 | vbox_bo_unreserve(bo);
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301 | return ret;
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302 | }
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303 |
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304 | ret = ttm_bo_kmap(&bo->bo, 0, bo->bo.num_pages, &bo->kmap);
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305 | vbox_bo_unreserve(bo);
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306 | if (ret) {
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307 | DRM_ERROR("failed to kmap fbcon\n");
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308 | return ret;
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309 | }
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310 |
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311 | info = drm_fb_helper_alloc_fbi(helper);
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312 | if (IS_ERR(info))
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313 | return -PTR_ERR(info);
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314 |
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315 | info->par = fbdev;
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316 |
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317 | fbdev->size = size;
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318 |
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319 | fb = &fbdev->afb.base;
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320 | fbdev->helper.fb = fb;
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321 |
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322 | strcpy(info->fix.id, "vboxdrmfb");
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323 |
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324 | /*
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325 | * The last flag forces a mode set on VT switches even if the kernel
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326 | * does not think it is needed.
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327 | */
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328 | info->flags = FBINFO_DEFAULT | FBINFO_MISC_ALWAYS_SETPAR;
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329 | info->fbops = &vboxfb_ops;
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330 |
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331 | /*
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332 | * This seems to be done for safety checking that the framebuffer
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333 | * is not registered twice by different drivers.
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334 | */
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335 | info->apertures->ranges[0].base = pci_resource_start(dev->pdev, 0);
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336 | info->apertures->ranges[0].size = pci_resource_len(dev->pdev, 0);
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337 |
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338 | #if LINUX_VERSION_CODE >= KERNEL_VERSION(5, 2, 0)
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339 | drm_fb_helper_fill_info(info, &fbdev->helper, sizes);
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340 | #elif LINUX_VERSION_CODE >= KERNEL_VERSION(4, 11, 0) || defined(RHEL_75)
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341 | drm_fb_helper_fill_fix(info, fb->pitches[0], fb->format->depth);
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342 | #else
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343 | drm_fb_helper_fill_fix(info, fb->pitches[0], fb->depth);
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344 | #endif
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345 | #if LINUX_VERSION_CODE < KERNEL_VERSION(5, 2, 0)
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346 | drm_fb_helper_fill_var(info, &fbdev->helper, sizes->fb_width,
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347 | sizes->fb_height);
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348 | #endif
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349 |
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350 | info->screen_base = (char __iomem *)bo->kmap.virtual;
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351 | info->screen_size = size;
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352 |
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353 | #ifdef CONFIG_FB_DEFERRED_IO
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354 | info->fbdefio = &vbox_defio;
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355 | fb_deferred_io_init(info);
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356 | #endif
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357 |
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358 | info->pixmap.flags = FB_PIXMAP_SYSTEM;
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359 |
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360 | DRM_DEBUG_KMS("allocated %dx%d\n", fb->width, fb->height);
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361 |
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362 | return 0;
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363 | }
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364 |
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365 | static struct drm_fb_helper_funcs vbox_fb_helper_funcs = {
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366 | .fb_probe = vboxfb_create,
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367 | };
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368 |
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369 | #if LINUX_VERSION_CODE < KERNEL_VERSION(4, 3, 0) && !defined(RHEL_73)
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370 | static void drm_fb_helper_unregister_fbi(struct drm_fb_helper *fb_helper)
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371 | {
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372 | if (fb_helper && fb_helper->fbdev)
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373 | unregister_framebuffer(fb_helper->fbdev);
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374 | }
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375 | #endif
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376 |
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377 | void vbox_fbdev_fini(struct drm_device *dev)
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378 | {
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379 | struct vbox_private *vbox = dev->dev_private;
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380 | struct vbox_fbdev *fbdev = vbox->fbdev;
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381 | struct vbox_framebuffer *afb = &fbdev->afb;
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382 |
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383 | #ifdef CONFIG_FB_DEFERRED_IO
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384 | if (fbdev->helper.fbdev && fbdev->helper.fbdev->fbdefio)
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385 | fb_deferred_io_cleanup(fbdev->helper.fbdev);
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386 | #endif
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387 |
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388 | drm_fb_helper_unregister_fbi(&fbdev->helper);
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389 |
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390 | if (afb->obj) {
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391 | struct vbox_bo *bo = gem_to_vbox_bo(afb->obj);
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392 |
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393 | if (!vbox_bo_reserve(bo, false)) {
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394 | if (bo->kmap.virtual)
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395 | ttm_bo_kunmap(&bo->kmap);
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396 | /*
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397 | * QXL does this, but is it really needed before
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398 | * freeing?
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399 | */
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400 | if (bo->pin_count)
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401 | vbox_bo_unpin(bo);
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402 | vbox_bo_unreserve(bo);
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403 | }
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404 | drm_gem_object_put_unlocked(afb->obj);
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405 | afb->obj = NULL;
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406 | }
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407 | drm_fb_helper_fini(&fbdev->helper);
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408 |
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409 | #if LINUX_VERSION_CODE >= KERNEL_VERSION(3, 9, 0)
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410 | drm_framebuffer_unregister_private(&afb->base);
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411 | #endif
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412 | drm_framebuffer_cleanup(&afb->base);
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413 | }
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414 |
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415 | int vbox_fbdev_init(struct drm_device *dev)
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416 | {
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417 | struct vbox_private *vbox = dev->dev_private;
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418 | struct vbox_fbdev *fbdev;
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419 | int ret;
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420 |
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421 | fbdev = devm_kzalloc(dev->dev, sizeof(*fbdev), GFP_KERNEL);
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422 | if (!fbdev)
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423 | return -ENOMEM;
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424 |
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425 | vbox->fbdev = fbdev;
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426 | spin_lock_init(&fbdev->dirty_lock);
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427 |
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428 | #if LINUX_VERSION_CODE < KERNEL_VERSION(3, 17, 0) && !defined(RHEL_72)
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429 | fbdev->helper.funcs = &vbox_fb_helper_funcs;
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430 | #else
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431 | drm_fb_helper_prepare(dev, &fbdev->helper, &vbox_fb_helper_funcs);
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432 | #endif
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433 | #if LINUX_VERSION_CODE >= KERNEL_VERSION(4, 11, 0) || defined(RHEL_75)
|
---|
434 | ret = drm_fb_helper_init(dev, &fbdev->helper, vbox->num_crtcs);
|
---|
435 | #else
|
---|
436 | ret =
|
---|
437 | drm_fb_helper_init(dev, &fbdev->helper, vbox->num_crtcs,
|
---|
438 | vbox->num_crtcs);
|
---|
439 | #endif
|
---|
440 | if (ret)
|
---|
441 | return ret;
|
---|
442 |
|
---|
443 | ret = drm_fb_helper_single_add_all_connectors(&fbdev->helper);
|
---|
444 | if (ret)
|
---|
445 | goto err_fini;
|
---|
446 |
|
---|
447 | /* disable all the possible outputs/crtcs before entering KMS mode */
|
---|
448 | drm_helper_disable_unused_functions(dev);
|
---|
449 |
|
---|
450 | ret = drm_fb_helper_initial_config(&fbdev->helper, 32);
|
---|
451 | if (ret)
|
---|
452 | goto err_fini;
|
---|
453 |
|
---|
454 | return 0;
|
---|
455 |
|
---|
456 | err_fini:
|
---|
457 | drm_fb_helper_fini(&fbdev->helper);
|
---|
458 | return ret;
|
---|
459 | }
|
---|
460 |
|
---|
461 | void vbox_fbdev_set_base(struct vbox_private *vbox, unsigned long gpu_addr)
|
---|
462 | {
|
---|
463 | struct fb_info *fbdev = vbox->fbdev->helper.fbdev;
|
---|
464 |
|
---|
465 | fbdev->fix.smem_start = fbdev->apertures->ranges[0].base + gpu_addr;
|
---|
466 | fbdev->fix.smem_len = vbox->available_vram_size - gpu_addr;
|
---|
467 | }
|
---|