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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 |
3031 | serge | 35 | |
36 | unsigned int drm_debug = 0; /* 1 to enable debug output */ |
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37 | EXPORT_SYMBOL(drm_debug); |
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38 | |||
4104 | Serge | 39 | unsigned int drm_rnodes = 0; /* 1 to enable experimental render nodes API */ |
40 | EXPORT_SYMBOL(drm_rnodes); |
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41 | |||
5060 | serge | 42 | /* 1 to allow user space to request universal planes (experimental) */ |
43 | unsigned int drm_universal_planes = 0; |
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44 | EXPORT_SYMBOL(drm_universal_planes); |
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45 | |||
3031 | serge | 46 | unsigned int drm_vblank_offdelay = 5000; /* Default to 5000 msecs. */ |
47 | EXPORT_SYMBOL(drm_vblank_offdelay); |
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48 | |||
49 | unsigned int drm_timestamp_precision = 20; /* Default to 20 usecs. */ |
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50 | EXPORT_SYMBOL(drm_timestamp_precision); |
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51 | |||
4104 | Serge | 52 | struct idr drm_minors_idr; |
5271 | serge | 53 | |
54 | void drm_err(const char *format, ...) |
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3031 | serge | 55 | { |
5271 | serge | 56 | struct va_format vaf; |
57 | va_list args; |
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3031 | serge | 58 | |
5271 | serge | 59 | va_start(args, format); |
3031 | serge | 60 | |
5271 | serge | 61 | vaf.fmt = format; |
62 | vaf.va = &args; |
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3031 | serge | 63 | |
5271 | serge | 64 | printk(KERN_ERR "[" DRM_NAME ":%pf] *ERROR* %pV", |
65 | __builtin_return_address(0), &vaf); |
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3031 | serge | 66 | |
5271 | serge | 67 | va_end(args); |
3031 | serge | 68 | } |
69 | EXPORT_SYMBOL(drm_err); |
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70 | |||
5060 | serge | 71 | void drm_ut_debug_printk(const char *function_name, const char *format, ...) |
3031 | serge | 72 | { |
4560 | Serge | 73 | struct va_format vaf; |
3031 | serge | 74 | va_list args; |
75 | |||
76 | // if (drm_debug & request_level) { |
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77 | // if (function_name) |
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78 | // printk(KERN_DEBUG "[%s:%s], ", prefix, function_name); |
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79 | // va_start(args, format); |
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80 | // vprintk(format, args); |
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81 | // va_end(args); |
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82 | // } |
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83 | } |
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84 | EXPORT_SYMBOL(drm_ut_debug_printk); |
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85 | |||
5060 | serge | 86 | #if 0 |
87 | struct drm_master *drm_master_create(struct drm_minor *minor) |
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88 | { |
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89 | struct drm_master *master; |
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90 | |||
91 | master = kzalloc(sizeof(*master), GFP_KERNEL); |
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92 | if (!master) |
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93 | return NULL; |
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94 | |||
95 | kref_init(&master->refcount); |
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96 | spin_lock_init(&master->lock.spinlock); |
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97 | init_waitqueue_head(&master->lock.lock_queue); |
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98 | if (drm_ht_create(&master->magiclist, DRM_MAGIC_HASH_ORDER)) { |
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99 | kfree(master); |
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100 | return NULL; |
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101 | } |
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102 | INIT_LIST_HEAD(&master->magicfree); |
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103 | master->minor = minor; |
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104 | |||
105 | return master; |
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106 | } |
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107 | |||
108 | struct drm_master *drm_master_get(struct drm_master *master) |
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109 | { |
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110 | kref_get(&master->refcount); |
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111 | return master; |
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112 | } |
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113 | EXPORT_SYMBOL(drm_master_get); |
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114 | |||
115 | static void drm_master_destroy(struct kref *kref) |
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116 | { |
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117 | struct drm_master *master = container_of(kref, struct drm_master, refcount); |
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118 | struct drm_magic_entry *pt, *next; |
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119 | struct drm_device *dev = master->minor->dev; |
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120 | struct drm_map_list *r_list, *list_temp; |
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121 | |||
122 | mutex_lock(&dev->struct_mutex); |
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123 | if (dev->driver->master_destroy) |
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124 | dev->driver->master_destroy(dev, master); |
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125 | |||
126 | list_for_each_entry_safe(r_list, list_temp, &dev->maplist, head) { |
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127 | if (r_list->master == master) { |
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128 | drm_rmmap_locked(dev, r_list->map); |
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129 | r_list = NULL; |
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130 | } |
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131 | } |
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132 | |||
133 | if (master->unique) { |
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134 | kfree(master->unique); |
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135 | master->unique = NULL; |
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136 | master->unique_len = 0; |
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137 | } |
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138 | |||
139 | list_for_each_entry_safe(pt, next, &master->magicfree, head) { |
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140 | list_del(&pt->head); |
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141 | drm_ht_remove_item(&master->magiclist, &pt->hash_item); |
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142 | kfree(pt); |
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143 | } |
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144 | |||
145 | drm_ht_remove(&master->magiclist); |
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146 | |||
147 | mutex_unlock(&dev->struct_mutex); |
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148 | kfree(master); |
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149 | } |
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150 | |||
151 | void drm_master_put(struct drm_master **master) |
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152 | { |
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153 | kref_put(&(*master)->refcount, drm_master_destroy); |
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154 | *master = NULL; |
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155 | } |
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156 | EXPORT_SYMBOL(drm_master_put); |
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157 | |||
158 | int drm_setmaster_ioctl(struct drm_device *dev, void *data, |
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159 | struct drm_file *file_priv) |
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160 | { |
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161 | int ret = 0; |
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162 | |||
163 | mutex_lock(&dev->master_mutex); |
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164 | if (file_priv->is_master) |
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165 | goto out_unlock; |
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166 | |||
167 | if (file_priv->minor->master) { |
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168 | ret = -EINVAL; |
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169 | goto out_unlock; |
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170 | } |
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171 | |||
172 | if (!file_priv->master) { |
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173 | ret = -EINVAL; |
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174 | goto out_unlock; |
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175 | } |
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176 | |||
177 | file_priv->minor->master = drm_master_get(file_priv->master); |
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178 | file_priv->is_master = 1; |
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179 | if (dev->driver->master_set) { |
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180 | ret = dev->driver->master_set(dev, file_priv, false); |
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181 | if (unlikely(ret != 0)) { |
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182 | file_priv->is_master = 0; |
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183 | drm_master_put(&file_priv->minor->master); |
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184 | } |
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185 | } |
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186 | |||
187 | out_unlock: |
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188 | mutex_unlock(&dev->master_mutex); |
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189 | return ret; |
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190 | } |
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191 | |||
192 | int drm_dropmaster_ioctl(struct drm_device *dev, void *data, |
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193 | struct drm_file *file_priv) |
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194 | { |
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195 | int ret = -EINVAL; |
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196 | |||
197 | mutex_lock(&dev->master_mutex); |
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198 | if (!file_priv->is_master) |
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199 | goto out_unlock; |
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200 | |||
201 | if (!file_priv->minor->master) |
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202 | goto out_unlock; |
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203 | |||
204 | ret = 0; |
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205 | if (dev->driver->master_drop) |
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206 | dev->driver->master_drop(dev, file_priv, false); |
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207 | drm_master_put(&file_priv->minor->master); |
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208 | file_priv->is_master = 0; |
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209 | |||
210 | out_unlock: |
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211 | mutex_unlock(&dev->master_mutex); |
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212 | return ret; |
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213 | } |
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214 | |||
215 | /* |
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216 | * DRM Minors |
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217 | * A DRM device can provide several char-dev interfaces on the DRM-Major. Each |
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218 | * of them is represented by a drm_minor object. Depending on the capabilities |
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219 | * of the device-driver, different interfaces are registered. |
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220 | * |
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221 | * Minors can be accessed via dev->$minor_name. This pointer is either |
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222 | * NULL or a valid drm_minor pointer and stays valid as long as the device is |
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223 | * valid. This means, DRM minors have the same life-time as the underlying |
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224 | * device. However, this doesn't mean that the minor is active. Minors are |
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225 | * registered and unregistered dynamically according to device-state. |
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226 | */ |
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227 | |||
228 | static struct drm_minor **drm_minor_get_slot(struct drm_device *dev, |
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229 | unsigned int type) |
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230 | { |
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231 | switch (type) { |
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232 | case DRM_MINOR_LEGACY: |
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233 | return &dev->primary; |
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234 | case DRM_MINOR_RENDER: |
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235 | return &dev->render; |
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236 | case DRM_MINOR_CONTROL: |
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237 | return &dev->control; |
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238 | default: |
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239 | return NULL; |
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240 | } |
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241 | } |
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242 | |||
243 | static int drm_minor_alloc(struct drm_device *dev, unsigned int type) |
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244 | { |
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245 | struct drm_minor *minor; |
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246 | |||
247 | minor = kzalloc(sizeof(*minor), GFP_KERNEL); |
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248 | if (!minor) |
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249 | return -ENOMEM; |
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250 | |||
251 | minor->type = type; |
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252 | minor->dev = dev; |
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253 | |||
254 | *drm_minor_get_slot(dev, type) = minor; |
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255 | return 0; |
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256 | } |
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257 | |||
258 | static void drm_minor_free(struct drm_device *dev, unsigned int type) |
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259 | { |
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260 | struct drm_minor **slot; |
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261 | |||
262 | slot = drm_minor_get_slot(dev, type); |
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263 | if (*slot) { |
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264 | drm_mode_group_destroy(&(*slot)->mode_group); |
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265 | kfree(*slot); |
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266 | *slot = NULL; |
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267 | } |
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268 | } |
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269 | |||
270 | static int drm_minor_register(struct drm_device *dev, unsigned int type) |
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271 | { |
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272 | struct drm_minor *new_minor; |
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273 | unsigned long flags; |
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274 | int ret; |
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275 | int minor_id; |
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276 | |||
277 | DRM_DEBUG("\n"); |
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278 | |||
279 | new_minor = *drm_minor_get_slot(dev, type); |
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280 | if (!new_minor) |
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281 | return 0; |
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282 | |||
283 | idr_preload(GFP_KERNEL); |
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284 | spin_lock_irqsave(&drm_minor_lock, flags); |
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285 | minor_id = idr_alloc(&drm_minors_idr, |
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286 | NULL, |
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287 | 64 * type, |
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288 | 64 * (type + 1), |
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289 | GFP_NOWAIT); |
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290 | spin_unlock_irqrestore(&drm_minor_lock, flags); |
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291 | idr_preload_end(); |
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292 | |||
293 | if (minor_id < 0) |
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294 | return minor_id; |
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295 | |||
296 | new_minor->index = minor_id; |
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297 | |||
298 | ret = drm_debugfs_init(new_minor, minor_id, drm_debugfs_root); |
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299 | if (ret) { |
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300 | DRM_ERROR("DRM: Failed to initialize /sys/kernel/debug/dri.\n"); |
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301 | goto err_id; |
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302 | } |
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303 | |||
304 | ret = drm_sysfs_device_add(new_minor); |
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305 | if (ret) { |
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306 | DRM_ERROR("DRM: Error sysfs_device_add.\n"); |
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307 | goto err_debugfs; |
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308 | } |
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309 | |||
310 | /* replace NULL with @minor so lookups will succeed from now on */ |
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311 | spin_lock_irqsave(&drm_minor_lock, flags); |
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312 | idr_replace(&drm_minors_idr, new_minor, new_minor->index); |
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313 | spin_unlock_irqrestore(&drm_minor_lock, flags); |
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314 | |||
315 | DRM_DEBUG("new minor assigned %d\n", minor_id); |
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316 | return 0; |
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317 | |||
318 | err_debugfs: |
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319 | drm_debugfs_cleanup(new_minor); |
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320 | err_id: |
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321 | spin_lock_irqsave(&drm_minor_lock, flags); |
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322 | idr_remove(&drm_minors_idr, minor_id); |
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323 | spin_unlock_irqrestore(&drm_minor_lock, flags); |
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324 | new_minor->index = 0; |
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325 | return ret; |
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326 | } |
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327 | |||
328 | static void drm_minor_unregister(struct drm_device *dev, unsigned int type) |
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329 | { |
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330 | struct drm_minor *minor; |
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331 | unsigned long flags; |
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332 | |||
333 | minor = *drm_minor_get_slot(dev, type); |
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334 | if (!minor || !minor->kdev) |
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335 | return; |
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336 | |||
337 | spin_lock_irqsave(&drm_minor_lock, flags); |
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338 | idr_remove(&drm_minors_idr, minor->index); |
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339 | spin_unlock_irqrestore(&drm_minor_lock, flags); |
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340 | minor->index = 0; |
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341 | |||
342 | drm_debugfs_cleanup(minor); |
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343 | drm_sysfs_device_remove(minor); |
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344 | } |
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345 | |||
346 | /** |
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347 | * drm_minor_acquire - Acquire a DRM minor |
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348 | * @minor_id: Minor ID of the DRM-minor |
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349 | * |
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350 | * Looks up the given minor-ID and returns the respective DRM-minor object. The |
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351 | * refence-count of the underlying device is increased so you must release this |
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352 | * object with drm_minor_release(). |
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353 | * |
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354 | * As long as you hold this minor, it is guaranteed that the object and the |
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355 | * minor->dev pointer will stay valid! However, the device may get unplugged and |
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356 | * unregistered while you hold the minor. |
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357 | * |
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358 | * Returns: |
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359 | * Pointer to minor-object with increased device-refcount, or PTR_ERR on |
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360 | * failure. |
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361 | */ |
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362 | struct drm_minor *drm_minor_acquire(unsigned int minor_id) |
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363 | { |
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364 | struct drm_minor *minor; |
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365 | unsigned long flags; |
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366 | |||
367 | spin_lock_irqsave(&drm_minor_lock, flags); |
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368 | minor = idr_find(&drm_minors_idr, minor_id); |
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369 | if (minor) |
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370 | drm_dev_ref(minor->dev); |
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371 | spin_unlock_irqrestore(&drm_minor_lock, flags); |
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372 | |||
373 | if (!minor) { |
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374 | return ERR_PTR(-ENODEV); |
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375 | } else if (drm_device_is_unplugged(minor->dev)) { |
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376 | drm_dev_unref(minor->dev); |
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377 | return ERR_PTR(-ENODEV); |
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378 | } |
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379 | |||
380 | return minor; |
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381 | } |
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382 | |||
383 | /** |
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384 | * drm_minor_release - Release DRM minor |
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385 | * @minor: Pointer to DRM minor object |
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386 | * |
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387 | * Release a minor that was previously acquired via drm_minor_acquire(). |
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388 | */ |
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389 | void drm_minor_release(struct drm_minor *minor) |
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390 | { |
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391 | drm_dev_unref(minor->dev); |
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392 | } |
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393 | |||
394 | /** |
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395 | * drm_put_dev - Unregister and release a DRM device |
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396 | * @dev: DRM device |
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397 | * |
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398 | * Called at module unload time or when a PCI device is unplugged. |
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399 | * |
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400 | * Use of this function is discouraged. It will eventually go away completely. |
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401 | * Please use drm_dev_unregister() and drm_dev_unref() explicitly instead. |
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402 | * |
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403 | * Cleans up all DRM device, calling drm_lastclose(). |
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404 | */ |
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405 | void drm_put_dev(struct drm_device *dev) |
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406 | { |
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407 | DRM_DEBUG("\n"); |
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408 | |||
409 | if (!dev) { |
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410 | DRM_ERROR("cleanup called no dev\n"); |
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411 | return; |
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412 | } |
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413 | |||
414 | drm_dev_unregister(dev); |
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415 | drm_dev_unref(dev); |
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416 | } |
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417 | EXPORT_SYMBOL(drm_put_dev); |
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418 | |||
419 | void drm_unplug_dev(struct drm_device *dev) |
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420 | { |
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421 | /* for a USB device */ |
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422 | drm_minor_unregister(dev, DRM_MINOR_LEGACY); |
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423 | drm_minor_unregister(dev, DRM_MINOR_RENDER); |
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424 | drm_minor_unregister(dev, DRM_MINOR_CONTROL); |
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425 | |||
426 | mutex_lock(&drm_global_mutex); |
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427 | |||
428 | drm_device_set_unplugged(dev); |
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429 | |||
430 | if (dev->open_count == 0) { |
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431 | drm_put_dev(dev); |
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432 | } |
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433 | mutex_unlock(&drm_global_mutex); |
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434 | } |
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435 | EXPORT_SYMBOL(drm_unplug_dev); |
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436 | |||
437 | /* |
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438 | * DRM internal mount |
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439 | * We want to be able to allocate our own "struct address_space" to control |
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440 | * memory-mappings in VRAM (or stolen RAM, ...). However, core MM does not allow |
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441 | * stand-alone address_space objects, so we need an underlying inode. As there |
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442 | * is no way to allocate an independent inode easily, we need a fake internal |
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443 | * VFS mount-point. |
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444 | * |
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445 | * The drm_fs_inode_new() function allocates a new inode, drm_fs_inode_free() |
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446 | * frees it again. You are allowed to use iget() and iput() to get references to |
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447 | * the inode. But each drm_fs_inode_new() call must be paired with exactly one |
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448 | * drm_fs_inode_free() call (which does not have to be the last iput()). |
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449 | * We use drm_fs_inode_*() to manage our internal VFS mount-point and share it |
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450 | * between multiple inode-users. You could, technically, call |
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451 | * iget() + drm_fs_inode_free() directly after alloc and sometime later do an |
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452 | * iput(), but this way you'd end up with a new vfsmount for each inode. |
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453 | */ |
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454 | |||
455 | static int drm_fs_cnt; |
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456 | static struct vfsmount *drm_fs_mnt; |
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457 | |||
458 | static const struct dentry_operations drm_fs_dops = { |
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459 | .d_dname = simple_dname, |
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460 | }; |
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461 | |||
462 | static const struct super_operations drm_fs_sops = { |
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463 | .statfs = simple_statfs, |
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464 | }; |
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465 | |||
466 | static struct dentry *drm_fs_mount(struct file_system_type *fs_type, int flags, |
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467 | const char *dev_name, void *data) |
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468 | { |
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469 | return mount_pseudo(fs_type, |
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470 | "drm:", |
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471 | &drm_fs_sops, |
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472 | &drm_fs_dops, |
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473 | 0x010203ff); |
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474 | } |
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475 | |||
476 | static struct file_system_type drm_fs_type = { |
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477 | .name = "drm", |
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478 | .owner = THIS_MODULE, |
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479 | .mount = drm_fs_mount, |
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480 | .kill_sb = kill_anon_super, |
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481 | }; |
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482 | |||
483 | #endif |
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484 | |||
485 | |||
486 | |||
487 | |||
488 | |||
4104 | Serge | 489 | int drm_fill_in_dev(struct drm_device *dev, |
490 | const struct pci_device_id *ent, |
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491 | struct drm_driver *driver) |
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492 | { |
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5060 | serge | 493 | int ret; |
494 | dev->driver = driver; |
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4104 | Serge | 495 | |
496 | INIT_LIST_HEAD(&dev->filelist); |
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497 | INIT_LIST_HEAD(&dev->ctxlist); |
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498 | INIT_LIST_HEAD(&dev->vmalist); |
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499 | INIT_LIST_HEAD(&dev->maplist); |
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500 | INIT_LIST_HEAD(&dev->vblank_event_list); |
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501 | |||
5060 | serge | 502 | spin_lock_init(&dev->buf_lock); |
4104 | Serge | 503 | spin_lock_init(&dev->event_lock); |
504 | mutex_init(&dev->struct_mutex); |
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505 | mutex_init(&dev->ctxlist_mutex); |
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506 | |||
507 | // if (drm_ht_create(&dev->map_hash, 12)) { |
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508 | // return -ENOMEM; |
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509 | // } |
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510 | |||
511 | |||
5060 | serge | 512 | |
4104 | Serge | 513 | if (driver->driver_features & DRIVER_GEM) { |
5060 | serge | 514 | ret = drm_gem_init(dev); |
515 | if (ret) { |
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516 | DRM_ERROR("Cannot initialize graphics execution manager (GEM)\n"); |
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517 | goto err_ctxbitmap; |
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4104 | Serge | 518 | } |
519 | } |
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520 | |||
521 | return 0; |
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522 | |||
5060 | serge | 523 | err_ctxbitmap: |
4104 | Serge | 524 | // drm_lastclose(dev); |
5060 | serge | 525 | return ret; |
4104 | Serge | 526 | } |
527 | EXPORT_SYMBOL(drm_fill_in_dev); |
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3031 | serge | 528 | /** |
529 | * Compute size order. Returns the exponent of the smaller power of two which |
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530 | * is greater or equal to given number. |
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531 | * |
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532 | * \param size size. |
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533 | * \return order. |
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534 | * |
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535 | * \todo Can be made faster. |
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536 | */ |
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537 | int drm_order(unsigned long size) |
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538 | { |
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539 | int order; |
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540 | unsigned long tmp; |
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541 | |||
542 | for (order = 0, tmp = size >> 1; tmp; tmp >>= 1, order++) ; |
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543 | |||
544 | if (size & (size - 1)) |
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545 | ++order; |
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546 | |||
547 | return order; |
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548 | } |
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3260 | Serge | 549 | |
550 | extern int x86_clflush_size; |
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551 | |||
552 | |||
5060 | serge | 553 | void drm_clflush_virt_range(void *addr, unsigned long length) |
3260 | Serge | 554 | { |
5060 | serge | 555 | char *tmp = addr; |
556 | char *end = tmp + length; |
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3260 | Serge | 557 | mb(); |
5060 | serge | 558 | for (; tmp < end; tmp += x86_clflush_size) |
559 | clflush(tmp); |
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3260 | Serge | 560 | clflush(end - 1); |
561 | mb(); |
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562 | return; |
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563 | } |
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564 | |||
6084 | serge | 565 | int drm_sysfs_connector_add(struct drm_connector *connector) |
566 | { |
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567 | return 0; |
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568 | } |
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5060 | serge | 569 | |
6084 | serge | 570 | void drm_sysfs_connector_remove(struct drm_connector *connector) |
571 | { |
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572 | }>> |