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Rev | Author | Line No. | Line |
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3031 | serge | 1 | /* |
2 | * Created: Fri Jan 19 10:48:35 2001 by faith@acm.org |
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3 | * |
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4 | * Copyright 2001 VA Linux Systems, Inc., Sunnyvale, California. |
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5 | * All Rights Reserved. |
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6 | * |
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5060 | serge | 7 | * Author Rickard E. (Rik) Faith |
8 | * |
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3031 | serge | 9 | * Permission is hereby granted, free of charge, to any person obtaining a |
10 | * copy of this software and associated documentation files (the "Software"), |
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11 | * to deal in the Software without restriction, including without limitation |
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12 | * the rights to use, copy, modify, merge, publish, distribute, sublicense, |
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13 | * and/or sell copies of the Software, and to permit persons to whom the |
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14 | * Software is furnished to do so, subject to the following conditions: |
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15 | * |
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16 | * The above copyright notice and this permission notice (including the next |
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17 | * paragraph) shall be included in all copies or substantial portions of the |
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18 | * Software. |
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19 | * |
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20 | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR |
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21 | * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, |
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22 | * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL |
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23 | * PRECISION INSIGHT AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM, DAMAGES OR |
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24 | * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, |
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25 | * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER |
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26 | * DEALINGS IN THE SOFTWARE. |
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27 | */ |
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28 | |||
5060 | serge | 29 | #include |
3031 | serge | 30 | #include |
4560 | Serge | 31 | #include |
3031 | serge | 32 | #include |
33 | #include |
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4104 | Serge | 34 | #include |
6660 | serge | 35 | #include "drm_internal.h" |
3031 | serge | 36 | |
37 | unsigned int drm_debug = 0; /* 1 to enable debug output */ |
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38 | EXPORT_SYMBOL(drm_debug); |
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39 | |||
4104 | Serge | 40 | unsigned int drm_rnodes = 0; /* 1 to enable experimental render nodes API */ |
41 | EXPORT_SYMBOL(drm_rnodes); |
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42 | |||
5060 | serge | 43 | /* 1 to allow user space to request universal planes (experimental) */ |
44 | unsigned int drm_universal_planes = 0; |
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45 | EXPORT_SYMBOL(drm_universal_planes); |
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46 | |||
3031 | serge | 47 | unsigned int drm_vblank_offdelay = 5000; /* Default to 5000 msecs. */ |
48 | EXPORT_SYMBOL(drm_vblank_offdelay); |
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49 | |||
50 | unsigned int drm_timestamp_precision = 20; /* Default to 20 usecs. */ |
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51 | EXPORT_SYMBOL(drm_timestamp_precision); |
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52 | |||
4104 | Serge | 53 | struct idr drm_minors_idr; |
5271 | serge | 54 | |
55 | void drm_err(const char *format, ...) |
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3031 | serge | 56 | { |
5271 | serge | 57 | struct va_format vaf; |
58 | va_list args; |
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3031 | serge | 59 | |
5271 | serge | 60 | va_start(args, format); |
3031 | serge | 61 | |
5271 | serge | 62 | vaf.fmt = format; |
63 | vaf.va = &args; |
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3031 | serge | 64 | |
5271 | serge | 65 | printk(KERN_ERR "[" DRM_NAME ":%pf] *ERROR* %pV", |
66 | __builtin_return_address(0), &vaf); |
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3031 | serge | 67 | |
5271 | serge | 68 | va_end(args); |
3031 | serge | 69 | } |
70 | EXPORT_SYMBOL(drm_err); |
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71 | |||
5060 | serge | 72 | void drm_ut_debug_printk(const char *function_name, const char *format, ...) |
3031 | serge | 73 | { |
4560 | Serge | 74 | struct va_format vaf; |
3031 | serge | 75 | va_list args; |
76 | |||
77 | // if (drm_debug & request_level) { |
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78 | // if (function_name) |
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79 | // printk(KERN_DEBUG "[%s:%s], ", prefix, function_name); |
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80 | // va_start(args, format); |
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81 | // vprintk(format, args); |
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82 | // va_end(args); |
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83 | // } |
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84 | } |
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85 | EXPORT_SYMBOL(drm_ut_debug_printk); |
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86 | |||
5060 | serge | 87 | #if 0 |
88 | struct drm_master *drm_master_create(struct drm_minor *minor) |
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89 | { |
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90 | struct drm_master *master; |
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91 | |||
92 | master = kzalloc(sizeof(*master), GFP_KERNEL); |
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93 | if (!master) |
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94 | return NULL; |
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95 | |||
96 | kref_init(&master->refcount); |
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97 | spin_lock_init(&master->lock.spinlock); |
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98 | init_waitqueue_head(&master->lock.lock_queue); |
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99 | if (drm_ht_create(&master->magiclist, DRM_MAGIC_HASH_ORDER)) { |
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100 | kfree(master); |
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101 | return NULL; |
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102 | } |
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103 | INIT_LIST_HEAD(&master->magicfree); |
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104 | master->minor = minor; |
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105 | |||
106 | return master; |
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107 | } |
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108 | |||
109 | struct drm_master *drm_master_get(struct drm_master *master) |
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110 | { |
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111 | kref_get(&master->refcount); |
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112 | return master; |
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113 | } |
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114 | EXPORT_SYMBOL(drm_master_get); |
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115 | |||
116 | static void drm_master_destroy(struct kref *kref) |
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117 | { |
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118 | struct drm_master *master = container_of(kref, struct drm_master, refcount); |
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119 | struct drm_magic_entry *pt, *next; |
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120 | struct drm_device *dev = master->minor->dev; |
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121 | struct drm_map_list *r_list, *list_temp; |
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122 | |||
123 | mutex_lock(&dev->struct_mutex); |
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124 | if (dev->driver->master_destroy) |
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125 | dev->driver->master_destroy(dev, master); |
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126 | |||
127 | list_for_each_entry_safe(r_list, list_temp, &dev->maplist, head) { |
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128 | if (r_list->master == master) { |
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129 | drm_rmmap_locked(dev, r_list->map); |
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130 | r_list = NULL; |
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131 | } |
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132 | } |
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133 | |||
134 | if (master->unique) { |
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135 | kfree(master->unique); |
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136 | master->unique = NULL; |
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137 | master->unique_len = 0; |
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138 | } |
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139 | |||
140 | list_for_each_entry_safe(pt, next, &master->magicfree, head) { |
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141 | list_del(&pt->head); |
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142 | drm_ht_remove_item(&master->magiclist, &pt->hash_item); |
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143 | kfree(pt); |
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144 | } |
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145 | |||
146 | drm_ht_remove(&master->magiclist); |
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147 | |||
148 | mutex_unlock(&dev->struct_mutex); |
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149 | kfree(master); |
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150 | } |
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151 | |||
152 | void drm_master_put(struct drm_master **master) |
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153 | { |
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154 | kref_put(&(*master)->refcount, drm_master_destroy); |
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155 | *master = NULL; |
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156 | } |
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157 | EXPORT_SYMBOL(drm_master_put); |
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158 | |||
159 | int drm_setmaster_ioctl(struct drm_device *dev, void *data, |
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160 | struct drm_file *file_priv) |
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161 | { |
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162 | int ret = 0; |
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163 | |||
164 | mutex_lock(&dev->master_mutex); |
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165 | if (file_priv->is_master) |
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166 | goto out_unlock; |
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167 | |||
168 | if (file_priv->minor->master) { |
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169 | ret = -EINVAL; |
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170 | goto out_unlock; |
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171 | } |
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172 | |||
173 | if (!file_priv->master) { |
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174 | ret = -EINVAL; |
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175 | goto out_unlock; |
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176 | } |
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177 | |||
178 | file_priv->minor->master = drm_master_get(file_priv->master); |
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179 | file_priv->is_master = 1; |
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180 | if (dev->driver->master_set) { |
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181 | ret = dev->driver->master_set(dev, file_priv, false); |
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182 | if (unlikely(ret != 0)) { |
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183 | file_priv->is_master = 0; |
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184 | drm_master_put(&file_priv->minor->master); |
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185 | } |
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186 | } |
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187 | |||
188 | out_unlock: |
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189 | mutex_unlock(&dev->master_mutex); |
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190 | return ret; |
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191 | } |
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192 | |||
193 | int drm_dropmaster_ioctl(struct drm_device *dev, void *data, |
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194 | struct drm_file *file_priv) |
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195 | { |
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196 | int ret = -EINVAL; |
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197 | |||
198 | mutex_lock(&dev->master_mutex); |
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199 | if (!file_priv->is_master) |
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200 | goto out_unlock; |
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201 | |||
202 | if (!file_priv->minor->master) |
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203 | goto out_unlock; |
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204 | |||
205 | ret = 0; |
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206 | if (dev->driver->master_drop) |
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207 | dev->driver->master_drop(dev, file_priv, false); |
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208 | drm_master_put(&file_priv->minor->master); |
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209 | file_priv->is_master = 0; |
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210 | |||
211 | out_unlock: |
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212 | mutex_unlock(&dev->master_mutex); |
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213 | return ret; |
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214 | } |
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215 | |||
216 | /* |
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217 | * DRM Minors |
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218 | * A DRM device can provide several char-dev interfaces on the DRM-Major. Each |
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219 | * of them is represented by a drm_minor object. Depending on the capabilities |
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220 | * of the device-driver, different interfaces are registered. |
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221 | * |
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222 | * Minors can be accessed via dev->$minor_name. This pointer is either |
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223 | * NULL or a valid drm_minor pointer and stays valid as long as the device is |
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224 | * valid. This means, DRM minors have the same life-time as the underlying |
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225 | * device. However, this doesn't mean that the minor is active. Minors are |
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226 | * registered and unregistered dynamically according to device-state. |
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227 | */ |
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228 | |||
229 | static struct drm_minor **drm_minor_get_slot(struct drm_device *dev, |
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230 | unsigned int type) |
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231 | { |
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232 | switch (type) { |
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233 | case DRM_MINOR_LEGACY: |
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234 | return &dev->primary; |
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235 | case DRM_MINOR_RENDER: |
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236 | return &dev->render; |
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237 | case DRM_MINOR_CONTROL: |
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238 | return &dev->control; |
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239 | default: |
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240 | return NULL; |
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241 | } |
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242 | } |
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243 | |||
244 | static int drm_minor_alloc(struct drm_device *dev, unsigned int type) |
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245 | { |
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246 | struct drm_minor *minor; |
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247 | |||
248 | minor = kzalloc(sizeof(*minor), GFP_KERNEL); |
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249 | if (!minor) |
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250 | return -ENOMEM; |
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251 | |||
252 | minor->type = type; |
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253 | minor->dev = dev; |
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254 | |||
255 | *drm_minor_get_slot(dev, type) = minor; |
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256 | return 0; |
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257 | } |
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258 | |||
259 | static void drm_minor_free(struct drm_device *dev, unsigned int type) |
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260 | { |
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261 | struct drm_minor **slot; |
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262 | |||
263 | slot = drm_minor_get_slot(dev, type); |
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264 | if (*slot) { |
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265 | drm_mode_group_destroy(&(*slot)->mode_group); |
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266 | kfree(*slot); |
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267 | *slot = NULL; |
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268 | } |
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269 | } |
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270 | |||
271 | static int drm_minor_register(struct drm_device *dev, unsigned int type) |
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272 | { |
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273 | struct drm_minor *new_minor; |
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274 | unsigned long flags; |
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275 | int ret; |
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276 | int minor_id; |
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277 | |||
278 | DRM_DEBUG("\n"); |
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279 | |||
280 | new_minor = *drm_minor_get_slot(dev, type); |
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281 | if (!new_minor) |
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282 | return 0; |
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283 | |||
284 | idr_preload(GFP_KERNEL); |
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285 | spin_lock_irqsave(&drm_minor_lock, flags); |
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286 | minor_id = idr_alloc(&drm_minors_idr, |
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287 | NULL, |
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288 | 64 * type, |
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289 | 64 * (type + 1), |
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290 | GFP_NOWAIT); |
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291 | spin_unlock_irqrestore(&drm_minor_lock, flags); |
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292 | idr_preload_end(); |
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293 | |||
294 | if (minor_id < 0) |
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295 | return minor_id; |
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296 | |||
297 | new_minor->index = minor_id; |
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298 | |||
299 | ret = drm_debugfs_init(new_minor, minor_id, drm_debugfs_root); |
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300 | if (ret) { |
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301 | DRM_ERROR("DRM: Failed to initialize /sys/kernel/debug/dri.\n"); |
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302 | goto err_id; |
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303 | } |
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304 | |||
305 | ret = drm_sysfs_device_add(new_minor); |
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306 | if (ret) { |
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307 | DRM_ERROR("DRM: Error sysfs_device_add.\n"); |
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308 | goto err_debugfs; |
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309 | } |
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310 | |||
311 | /* replace NULL with @minor so lookups will succeed from now on */ |
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312 | spin_lock_irqsave(&drm_minor_lock, flags); |
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313 | idr_replace(&drm_minors_idr, new_minor, new_minor->index); |
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314 | spin_unlock_irqrestore(&drm_minor_lock, flags); |
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315 | |||
316 | DRM_DEBUG("new minor assigned %d\n", minor_id); |
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317 | return 0; |
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318 | |||
319 | err_debugfs: |
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320 | drm_debugfs_cleanup(new_minor); |
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321 | err_id: |
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322 | spin_lock_irqsave(&drm_minor_lock, flags); |
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323 | idr_remove(&drm_minors_idr, minor_id); |
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324 | spin_unlock_irqrestore(&drm_minor_lock, flags); |
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325 | new_minor->index = 0; |
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326 | return ret; |
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327 | } |
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328 | |||
329 | static void drm_minor_unregister(struct drm_device *dev, unsigned int type) |
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330 | { |
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331 | struct drm_minor *minor; |
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332 | unsigned long flags; |
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333 | |||
334 | minor = *drm_minor_get_slot(dev, type); |
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335 | if (!minor || !minor->kdev) |
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336 | return; |
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337 | |||
338 | spin_lock_irqsave(&drm_minor_lock, flags); |
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339 | idr_remove(&drm_minors_idr, minor->index); |
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340 | spin_unlock_irqrestore(&drm_minor_lock, flags); |
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341 | minor->index = 0; |
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342 | |||
343 | drm_debugfs_cleanup(minor); |
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344 | drm_sysfs_device_remove(minor); |
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345 | } |
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346 | |||
347 | /** |
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348 | * drm_minor_acquire - Acquire a DRM minor |
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349 | * @minor_id: Minor ID of the DRM-minor |
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350 | * |
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351 | * Looks up the given minor-ID and returns the respective DRM-minor object. The |
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352 | * refence-count of the underlying device is increased so you must release this |
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353 | * object with drm_minor_release(). |
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354 | * |
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355 | * As long as you hold this minor, it is guaranteed that the object and the |
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356 | * minor->dev pointer will stay valid! However, the device may get unplugged and |
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357 | * unregistered while you hold the minor. |
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358 | * |
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359 | * Returns: |
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360 | * Pointer to minor-object with increased device-refcount, or PTR_ERR on |
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361 | * failure. |
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362 | */ |
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363 | struct drm_minor *drm_minor_acquire(unsigned int minor_id) |
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364 | { |
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365 | struct drm_minor *minor; |
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366 | unsigned long flags; |
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367 | |||
368 | spin_lock_irqsave(&drm_minor_lock, flags); |
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369 | minor = idr_find(&drm_minors_idr, minor_id); |
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370 | if (minor) |
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371 | drm_dev_ref(minor->dev); |
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372 | spin_unlock_irqrestore(&drm_minor_lock, flags); |
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373 | |||
374 | if (!minor) { |
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375 | return ERR_PTR(-ENODEV); |
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376 | } else if (drm_device_is_unplugged(minor->dev)) { |
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377 | drm_dev_unref(minor->dev); |
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378 | return ERR_PTR(-ENODEV); |
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379 | } |
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380 | |||
381 | return minor; |
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382 | } |
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383 | |||
384 | /** |
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385 | * drm_minor_release - Release DRM minor |
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386 | * @minor: Pointer to DRM minor object |
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387 | * |
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388 | * Release a minor that was previously acquired via drm_minor_acquire(). |
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389 | */ |
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390 | void drm_minor_release(struct drm_minor *minor) |
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391 | { |
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392 | drm_dev_unref(minor->dev); |
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393 | } |
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394 | |||
395 | /** |
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396 | * drm_put_dev - Unregister and release a DRM device |
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397 | * @dev: DRM device |
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398 | * |
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399 | * Called at module unload time or when a PCI device is unplugged. |
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400 | * |
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401 | * Use of this function is discouraged. It will eventually go away completely. |
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402 | * Please use drm_dev_unregister() and drm_dev_unref() explicitly instead. |
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403 | * |
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404 | * Cleans up all DRM device, calling drm_lastclose(). |
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405 | */ |
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406 | void drm_put_dev(struct drm_device *dev) |
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407 | { |
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408 | DRM_DEBUG("\n"); |
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409 | |||
410 | if (!dev) { |
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411 | DRM_ERROR("cleanup called no dev\n"); |
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412 | return; |
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413 | } |
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414 | |||
415 | drm_dev_unregister(dev); |
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416 | drm_dev_unref(dev); |
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417 | } |
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418 | EXPORT_SYMBOL(drm_put_dev); |
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419 | |||
420 | void drm_unplug_dev(struct drm_device *dev) |
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421 | { |
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422 | /* for a USB device */ |
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423 | drm_minor_unregister(dev, DRM_MINOR_LEGACY); |
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424 | drm_minor_unregister(dev, DRM_MINOR_RENDER); |
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425 | drm_minor_unregister(dev, DRM_MINOR_CONTROL); |
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426 | |||
427 | mutex_lock(&drm_global_mutex); |
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428 | |||
429 | drm_device_set_unplugged(dev); |
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430 | |||
431 | if (dev->open_count == 0) { |
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432 | drm_put_dev(dev); |
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433 | } |
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434 | mutex_unlock(&drm_global_mutex); |
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435 | } |
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436 | EXPORT_SYMBOL(drm_unplug_dev); |
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437 | |||
438 | /* |
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439 | * DRM internal mount |
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440 | * We want to be able to allocate our own "struct address_space" to control |
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441 | * memory-mappings in VRAM (or stolen RAM, ...). However, core MM does not allow |
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442 | * stand-alone address_space objects, so we need an underlying inode. As there |
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443 | * is no way to allocate an independent inode easily, we need a fake internal |
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444 | * VFS mount-point. |
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445 | * |
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446 | * The drm_fs_inode_new() function allocates a new inode, drm_fs_inode_free() |
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447 | * frees it again. You are allowed to use iget() and iput() to get references to |
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448 | * the inode. But each drm_fs_inode_new() call must be paired with exactly one |
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449 | * drm_fs_inode_free() call (which does not have to be the last iput()). |
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450 | * We use drm_fs_inode_*() to manage our internal VFS mount-point and share it |
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451 | * between multiple inode-users. You could, technically, call |
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452 | * iget() + drm_fs_inode_free() directly after alloc and sometime later do an |
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453 | * iput(), but this way you'd end up with a new vfsmount for each inode. |
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454 | */ |
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455 | |||
456 | static int drm_fs_cnt; |
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457 | static struct vfsmount *drm_fs_mnt; |
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458 | |||
459 | static const struct dentry_operations drm_fs_dops = { |
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460 | .d_dname = simple_dname, |
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461 | }; |
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462 | |||
463 | static const struct super_operations drm_fs_sops = { |
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464 | .statfs = simple_statfs, |
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465 | }; |
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466 | |||
467 | static struct dentry *drm_fs_mount(struct file_system_type *fs_type, int flags, |
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468 | const char *dev_name, void *data) |
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469 | { |
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470 | return mount_pseudo(fs_type, |
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471 | "drm:", |
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472 | &drm_fs_sops, |
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473 | &drm_fs_dops, |
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474 | 0x010203ff); |
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475 | } |
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476 | |||
477 | static struct file_system_type drm_fs_type = { |
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478 | .name = "drm", |
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479 | .owner = THIS_MODULE, |
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480 | .mount = drm_fs_mount, |
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481 | .kill_sb = kill_anon_super, |
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482 | }; |
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483 | |||
484 | #endif |
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485 | |||
486 | |||
487 | |||
488 | |||
489 | |||
4104 | Serge | 490 | int drm_fill_in_dev(struct drm_device *dev, |
491 | const struct pci_device_id *ent, |
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492 | struct drm_driver *driver) |
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493 | { |
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5060 | serge | 494 | int ret; |
495 | dev->driver = driver; |
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4104 | Serge | 496 | |
497 | INIT_LIST_HEAD(&dev->filelist); |
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498 | INIT_LIST_HEAD(&dev->ctxlist); |
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499 | INIT_LIST_HEAD(&dev->vmalist); |
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500 | INIT_LIST_HEAD(&dev->maplist); |
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501 | INIT_LIST_HEAD(&dev->vblank_event_list); |
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502 | |||
5060 | serge | 503 | spin_lock_init(&dev->buf_lock); |
4104 | Serge | 504 | spin_lock_init(&dev->event_lock); |
505 | mutex_init(&dev->struct_mutex); |
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506 | mutex_init(&dev->ctxlist_mutex); |
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507 | |||
508 | // if (drm_ht_create(&dev->map_hash, 12)) { |
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509 | // return -ENOMEM; |
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510 | // } |
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511 | |||
512 | |||
5060 | serge | 513 | |
4104 | Serge | 514 | if (driver->driver_features & DRIVER_GEM) { |
5060 | serge | 515 | ret = drm_gem_init(dev); |
516 | if (ret) { |
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517 | DRM_ERROR("Cannot initialize graphics execution manager (GEM)\n"); |
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518 | goto err_ctxbitmap; |
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4104 | Serge | 519 | } |
520 | } |
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521 | |||
522 | return 0; |
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523 | |||
5060 | serge | 524 | err_ctxbitmap: |
4104 | Serge | 525 | // drm_lastclose(dev); |
5060 | serge | 526 | return ret; |
4104 | Serge | 527 | } |
528 | EXPORT_SYMBOL(drm_fill_in_dev); |
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3031 | serge | 529 | /** |
530 | * Compute size order. Returns the exponent of the smaller power of two which |
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531 | * is greater or equal to given number. |
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532 | * |
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533 | * \param size size. |
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534 | * \return order. |
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535 | * |
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536 | * \todo Can be made faster. |
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537 | */ |
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538 | int drm_order(unsigned long size) |
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539 | { |
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540 | int order; |
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541 | unsigned long tmp; |
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542 | |||
543 | for (order = 0, tmp = size >> 1; tmp; tmp >>= 1, order++) ; |
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544 | |||
545 | if (size & (size - 1)) |
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546 | ++order; |
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547 | |||
548 | return order; |
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549 | } |
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3260 | Serge | 550 | |
6084 | serge | 551 | int drm_sysfs_connector_add(struct drm_connector *connector) |
552 | { |
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553 | return 0; |
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554 | } |
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5060 | serge | 555 | |
6084 | serge | 556 | void drm_sysfs_connector_remove(struct drm_connector *connector) |
6296 | serge | 557 | { } |
558 | |||
559 | void drm_sysfs_hotplug_event(struct drm_device *dev) |
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6084 | serge | 560 | { |
6296 | serge | 561 | DRM_DEBUG("generating hotplug event\n"); |
6084 | serge | 562 | }> |
6296 | serge | 563 |