1 | /* $Id: vbox_fb.c 71947 2018-04-20 14:59:20Z 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) 2013-2017 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 <airlied@redhat.com>
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32 | * Michael Thayer <michael.thayer@oracle.com,
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33 | */
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34 | /* Include from most specific to most general to be able to override things. */
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35 | #include "vbox_drv.h"
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36 | #include <VBoxVideo.h>
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37 |
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38 | #include <linux/module.h>
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39 | #include <linux/kernel.h>
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40 | #include <linux/errno.h>
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41 | #include <linux/string.h>
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42 | #include <linux/mm.h>
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43 | #include <linux/tty.h>
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44 | #include <linux/sysrq.h>
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45 | #include <linux/delay.h>
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46 | #include <linux/fb.h>
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47 | #include <linux/init.h>
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48 |
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49 | #include <drm/drmP.h>
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50 | #include <drm/drm_crtc.h>
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51 | #include <drm/drm_fb_helper.h>
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52 | #include <drm/drm_crtc_helper.h>
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53 | #include "vbox_drv.h"
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54 |
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55 | #define VBOX_DIRTY_DELAY (HZ / 30)
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56 | /**
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57 | * Tell the host about dirty rectangles to update.
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58 | */
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59 | static void vbox_dirty_update(struct vbox_fbdev *fbdev,
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60 | int x, int y, int width, int height)
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61 | {
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62 | struct drm_gem_object *obj;
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63 | struct vbox_bo *bo;
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64 | int ret = -EBUSY;
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65 | bool store_for_later = false;
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66 | int x2, y2;
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67 | unsigned long flags;
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68 | struct drm_clip_rect rect;
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69 |
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70 | obj = fbdev->afb.obj;
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71 | bo = gem_to_vbox_bo(obj);
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72 |
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73 | /*
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74 | * try and reserve the BO, if we fail with busy
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75 | * then the BO is being moved and we should
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76 | * store up the damage until later.
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77 | */
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78 | if (drm_can_sleep())
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79 | ret = vbox_bo_reserve(bo, true);
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80 | if (ret) {
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81 | if (ret != -EBUSY)
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82 | return;
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83 |
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84 | store_for_later = true;
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85 | }
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86 |
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87 | x2 = x + width - 1;
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88 | y2 = y + height - 1;
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89 | spin_lock_irqsave(&fbdev->dirty_lock, flags);
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90 |
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91 | if (fbdev->y1 < y)
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92 | y = fbdev->y1;
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93 | if (fbdev->y2 > y2)
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94 | y2 = fbdev->y2;
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95 | if (fbdev->x1 < x)
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96 | x = fbdev->x1;
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97 | if (fbdev->x2 > x2)
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98 | x2 = fbdev->x2;
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99 |
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100 | if (store_for_later) {
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101 | fbdev->x1 = x;
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102 | fbdev->x2 = x2;
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103 | fbdev->y1 = y;
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104 | fbdev->y2 = y2;
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105 | spin_unlock_irqrestore(&fbdev->dirty_lock, flags);
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106 | return;
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107 | }
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108 |
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109 | fbdev->x1 = INT_MAX;
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110 | fbdev->y1 = INT_MAX;
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111 | fbdev->x2 = 0;
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112 | fbdev->y2 = 0;
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113 |
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114 | spin_unlock_irqrestore(&fbdev->dirty_lock, flags);
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115 |
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116 | /*
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117 | * Not sure why the original code subtracted 1 here, but I will keep
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118 | * it that way to avoid unnecessary differences.
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119 | */
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120 | rect.x1 = x;
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121 | rect.x2 = x2 + 1;
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122 | rect.y1 = y;
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123 | rect.y2 = y2 + 1;
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124 | vbox_framebuffer_dirty_rectangles(&fbdev->afb.base, &rect, 1);
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125 |
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126 | vbox_bo_unreserve(bo);
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127 | }
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128 |
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129 | #ifdef CONFIG_FB_DEFERRED_IO
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130 | static void vbox_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 |
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155 | static struct fb_deferred_io vbox_defio = {
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156 | .delay = VBOX_DIRTY_DELAY,
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157 | .deferred_io = vbox_deferred_io,
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158 | };
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159 | #endif
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160 |
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161 | static void vbox_fillrect(struct fb_info *info, const struct fb_fillrect *rect)
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162 | {
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163 | struct vbox_fbdev *fbdev = info->par;
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164 |
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165 | sys_fillrect(info, rect);
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166 | vbox_dirty_update(fbdev, rect->dx, rect->dy, rect->width, rect->height);
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167 | }
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168 |
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169 | static void vbox_copyarea(struct fb_info *info, const struct fb_copyarea *area)
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170 | {
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171 | struct vbox_fbdev *fbdev = info->par;
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172 |
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173 | sys_copyarea(info, area);
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174 | vbox_dirty_update(fbdev, area->dx, area->dy, area->width, area->height);
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175 | }
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176 |
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177 | static void vbox_imageblit(struct fb_info *info, const struct fb_image *image)
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178 | {
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179 | struct vbox_fbdev *fbdev = info->par;
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180 |
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181 | sys_imageblit(info, image);
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182 | vbox_dirty_update(fbdev, image->dx, image->dy, image->width,
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183 | image->height);
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184 | }
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185 |
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186 | static struct fb_ops vboxfb_ops = {
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187 | .owner = THIS_MODULE,
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188 | .fb_check_var = drm_fb_helper_check_var,
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189 | .fb_set_par = drm_fb_helper_set_par,
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190 | .fb_fillrect = vbox_fillrect,
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191 | .fb_copyarea = vbox_copyarea,
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192 | .fb_imageblit = vbox_imageblit,
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193 | .fb_pan_display = drm_fb_helper_pan_display,
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194 | .fb_blank = drm_fb_helper_blank,
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195 | .fb_setcmap = drm_fb_helper_setcmap,
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196 | .fb_debug_enter = drm_fb_helper_debug_enter,
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197 | .fb_debug_leave = drm_fb_helper_debug_leave,
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198 | };
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199 |
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200 | static int vboxfb_create_object(struct vbox_fbdev *fbdev,
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201 | struct DRM_MODE_FB_CMD *mode_cmd,
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202 | struct drm_gem_object **gobj_p)
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203 | {
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204 | struct drm_device *dev = fbdev->helper.dev;
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205 | u32 size;
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206 | struct drm_gem_object *gobj;
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207 | #if LINUX_VERSION_CODE < KERNEL_VERSION(3, 3, 0)
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208 | u32 pitch = mode_cmd->pitch;
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209 | #else
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210 | u32 pitch = mode_cmd->pitches[0];
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211 | #endif
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212 |
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213 | int ret = 0;
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214 |
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215 | size = pitch * mode_cmd->height;
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216 | ret = vbox_gem_create(dev, size, true, &gobj);
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217 | if (ret)
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218 | return ret;
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219 |
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220 | *gobj_p = gobj;
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221 | return ret;
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222 | }
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223 |
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224 | static int vboxfb_create(struct drm_fb_helper *helper,
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225 | struct drm_fb_helper_surface_size *sizes)
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226 | {
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227 | struct vbox_fbdev *fbdev =
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228 | container_of(helper, struct vbox_fbdev, helper);
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229 | struct drm_device *dev = fbdev->helper.dev;
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230 | struct DRM_MODE_FB_CMD mode_cmd;
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231 | struct drm_framebuffer *fb;
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232 | struct fb_info *info;
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233 | struct device *device = &dev->pdev->dev;
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234 | struct drm_gem_object *gobj = NULL;
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235 | struct vbox_bo *bo = NULL;
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236 | int size, ret;
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237 | u32 pitch;
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238 |
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239 | mode_cmd.width = sizes->surface_width;
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240 | mode_cmd.height = sizes->surface_height;
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241 | pitch = mode_cmd.width * ((sizes->surface_bpp + 7) / 8);
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242 | #if LINUX_VERSION_CODE < KERNEL_VERSION(3, 3, 0)
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243 | mode_cmd.bpp = sizes->surface_bpp;
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244 | mode_cmd.depth = sizes->surface_depth;
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245 | mode_cmd.pitch = pitch;
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246 | #else
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247 | mode_cmd.pixel_format = drm_mode_legacy_fb_format(sizes->surface_bpp,
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248 | sizes->surface_depth);
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249 | mode_cmd.pitches[0] = pitch;
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250 | #endif
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251 |
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252 | size = pitch * mode_cmd.height;
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253 |
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254 | ret = vboxfb_create_object(fbdev, &mode_cmd, &gobj);
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255 | if (ret) {
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256 | DRM_ERROR("failed to create fbcon backing object %d\n", ret);
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257 | return ret;
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258 | }
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259 |
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260 | ret = vbox_framebuffer_init(dev, &fbdev->afb, &mode_cmd, gobj);
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261 | if (ret)
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262 | return ret;
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263 |
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264 | bo = gem_to_vbox_bo(gobj);
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265 |
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266 | ret = vbox_bo_reserve(bo, false);
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267 | if (ret)
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268 | return ret;
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269 |
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270 | ret = vbox_bo_pin(bo, TTM_PL_FLAG_VRAM, NULL);
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271 | if (ret) {
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272 | vbox_bo_unreserve(bo);
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273 | return ret;
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274 | }
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275 |
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276 | ret = ttm_bo_kmap(&bo->bo, 0, bo->bo.num_pages, &bo->kmap);
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277 | vbox_bo_unreserve(bo);
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278 | if (ret) {
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279 | DRM_ERROR("failed to kmap fbcon\n");
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280 | return ret;
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281 | }
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282 |
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283 | info = framebuffer_alloc(0, device);
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284 | if (!info)
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285 | return -ENOMEM;
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286 | info->par = fbdev;
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287 |
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288 | fbdev->size = size;
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289 |
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290 | fb = &fbdev->afb.base;
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291 | fbdev->helper.fb = fb;
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292 | fbdev->helper.fbdev = info;
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293 |
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294 | strcpy(info->fix.id, "vboxdrmfb");
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295 |
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296 | /*
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297 | * The last flag forces a mode set on VT switches even if the kernel
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298 | * does not think it is needed.
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299 | */
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300 | info->flags = FBINFO_DEFAULT | FBINFO_CAN_FORCE_OUTPUT |
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301 | FBINFO_MISC_ALWAYS_SETPAR;
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302 | info->fbops = &vboxfb_ops;
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303 |
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304 | ret = fb_alloc_cmap(&info->cmap, 256, 0);
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305 | if (ret)
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306 | return -ENOMEM;
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307 |
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308 | /*
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309 | * This seems to be done for safety checking that the framebuffer
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310 | * is not registered twice by different drivers.
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311 | */
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312 | info->apertures = alloc_apertures(1);
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313 | if (!info->apertures)
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314 | return -ENOMEM;
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315 | info->apertures->ranges[0].base = pci_resource_start(dev->pdev, 0);
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316 | info->apertures->ranges[0].size = pci_resource_len(dev->pdev, 0);
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317 | info->fix.smem_start = 0;
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318 | info->fix.smem_len = size;
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319 |
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320 | #if LINUX_VERSION_CODE >= KERNEL_VERSION(4, 11, 0) || defined(RHEL_75)
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321 | drm_fb_helper_fill_fix(info, fb->pitches[0], fb->format->depth);
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322 | #else
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323 | drm_fb_helper_fill_fix(info, fb->pitches[0], fb->depth);
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324 | #endif
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325 | drm_fb_helper_fill_var(info, &fbdev->helper, sizes->fb_width,
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326 | sizes->fb_height);
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327 |
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328 | info->screen_base = bo->kmap.virtual;
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329 | info->screen_size = size;
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330 |
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331 | #ifdef CONFIG_FB_DEFERRED_IO
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332 | info->fbdefio = &vbox_defio;
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333 | fb_deferred_io_init(info);
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334 | #endif
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335 |
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336 | info->pixmap.flags = FB_PIXMAP_SYSTEM;
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337 |
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338 | DRM_DEBUG_KMS("allocated %dx%d\n", fb->width, fb->height);
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339 |
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340 | return 0;
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341 | }
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342 |
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343 | static struct drm_fb_helper_funcs vbox_fb_helper_funcs = {
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344 | .fb_probe = vboxfb_create,
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345 | };
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346 |
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347 | static void vbox_fbdev_destroy(struct drm_device *dev, struct vbox_fbdev *fbdev)
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348 | {
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349 | struct fb_info *info;
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350 | struct vbox_framebuffer *afb = &fbdev->afb;
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351 |
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352 | if (fbdev->helper.fbdev) {
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353 | info = fbdev->helper.fbdev;
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354 | unregister_framebuffer(info);
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355 | if (info->cmap.len)
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356 | fb_dealloc_cmap(&info->cmap);
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357 | framebuffer_release(info);
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358 | }
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359 |
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360 | if (afb->obj) {
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361 | struct vbox_bo *bo = gem_to_vbox_bo(afb->obj);
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362 |
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363 | if (!vbox_bo_reserve(bo, false)) {
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364 | if (bo->kmap.virtual)
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365 | ttm_bo_kunmap(&bo->kmap);
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366 | /*
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367 | * QXL does this, but is it really needed before
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368 | * freeing?
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369 | */
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370 | if (bo->pin_count)
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371 | vbox_bo_unpin(bo);
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372 | vbox_bo_unreserve(bo);
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373 | }
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374 | drm_gem_object_unreference_unlocked(afb->obj);
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375 | afb->obj = NULL;
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376 | }
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377 | drm_fb_helper_fini(&fbdev->helper);
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378 |
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379 | #if LINUX_VERSION_CODE >= KERNEL_VERSION(3, 9, 0)
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380 | drm_framebuffer_unregister_private(&afb->base);
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381 | #endif
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382 | drm_framebuffer_cleanup(&afb->base);
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383 | }
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384 |
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385 | int vbox_fbdev_init(struct drm_device *dev)
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386 | {
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387 | struct vbox_private *vbox = dev->dev_private;
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388 | struct vbox_fbdev *fbdev;
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389 | int ret;
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390 |
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391 | fbdev = kzalloc(sizeof(*fbdev), GFP_KERNEL);
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392 | if (!fbdev)
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393 | return -ENOMEM;
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394 |
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395 | vbox->fbdev = fbdev;
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396 | spin_lock_init(&fbdev->dirty_lock);
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397 |
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398 | #if LINUX_VERSION_CODE < KERNEL_VERSION(3, 17, 0) && !defined(RHEL_73)
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399 | fbdev->helper.funcs = &vbox_fb_helper_funcs;
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400 | #else
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401 | drm_fb_helper_prepare(dev, &fbdev->helper, &vbox_fb_helper_funcs);
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402 | #endif
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403 | #if LINUX_VERSION_CODE >= KERNEL_VERSION(4, 11, 0) || defined(RHEL_75)
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404 | ret = drm_fb_helper_init(dev, &fbdev->helper, vbox->num_crtcs);
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405 | #else
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406 | ret =
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407 | drm_fb_helper_init(dev, &fbdev->helper, vbox->num_crtcs,
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408 | vbox->num_crtcs);
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409 | #endif
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410 | if (ret)
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411 | goto free;
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412 |
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413 | ret = drm_fb_helper_single_add_all_connectors(&fbdev->helper);
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414 | if (ret)
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415 | goto fini;
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416 |
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417 | /* disable all the possible outputs/crtcs before entering KMS mode */
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418 | drm_helper_disable_unused_functions(dev);
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419 |
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420 | ret = drm_fb_helper_initial_config(&fbdev->helper, 32);
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421 | if (ret)
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422 | goto fini;
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423 |
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424 | return 0;
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425 |
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426 | fini:
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427 | drm_fb_helper_fini(&fbdev->helper);
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428 | free:
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429 | kfree(fbdev);
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430 | vbox->fbdev = NULL;
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431 |
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432 | return ret;
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433 | }
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434 |
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435 | void vbox_fbdev_fini(struct drm_device *dev)
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436 | {
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437 | struct vbox_private *vbox = dev->dev_private;
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438 |
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439 | if (!vbox->fbdev)
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440 | return;
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441 |
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442 | vbox_fbdev_destroy(dev, vbox->fbdev);
|
---|
443 | kfree(vbox->fbdev);
|
---|
444 | vbox->fbdev = NULL;
|
---|
445 | }
|
---|
446 |
|
---|
447 | void vbox_fbdev_set_suspend(struct drm_device *dev, int state)
|
---|
448 | {
|
---|
449 | struct vbox_private *vbox = dev->dev_private;
|
---|
450 |
|
---|
451 | if (!vbox->fbdev)
|
---|
452 | return;
|
---|
453 |
|
---|
454 | fb_set_suspend(vbox->fbdev->helper.fbdev, state);
|
---|
455 | }
|
---|