Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | /** |
| 2 | * \file drm_stub.h |
| 3 | * Stub support |
| 4 | * |
| 5 | * \author Rickard E. (Rik) Faith <faith@valinux.com> |
| 6 | */ |
| 7 | |
| 8 | /* |
| 9 | * Created: Fri Jan 19 10:48:35 2001 by faith@acm.org |
| 10 | * |
| 11 | * Copyright 2001 VA Linux Systems, Inc., Sunnyvale, California. |
| 12 | * All Rights Reserved. |
| 13 | * |
| 14 | * Permission is hereby granted, free of charge, to any person obtaining a |
| 15 | * copy of this software and associated documentation files (the "Software"), |
| 16 | * to deal in the Software without restriction, including without limitation |
| 17 | * the rights to use, copy, modify, merge, publish, distribute, sublicense, |
| 18 | * and/or sell copies of the Software, and to permit persons to whom the |
| 19 | * Software is furnished to do so, subject to the following conditions: |
| 20 | * |
| 21 | * The above copyright notice and this permission notice (including the next |
| 22 | * paragraph) shall be included in all copies or substantial portions of the |
| 23 | * Software. |
| 24 | * |
| 25 | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR |
| 26 | * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, |
| 27 | * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL |
| 28 | * PRECISION INSIGHT AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM, DAMAGES OR |
| 29 | * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, |
| 30 | * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER |
| 31 | * DEALINGS IN THE SOFTWARE. |
| 32 | */ |
| 33 | |
David Herrmann | 31bbe16 | 2014-01-03 14:09:47 +0100 | [diff] [blame] | 34 | #include <linux/fs.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 35 | #include <linux/module.h> |
| 36 | #include <linux/moduleparam.h> |
David Herrmann | 31bbe16 | 2014-01-03 14:09:47 +0100 | [diff] [blame] | 37 | #include <linux/mount.h> |
Tejun Heo | 5a0e3ad | 2010-03-24 17:04:11 +0900 | [diff] [blame] | 38 | #include <linux/slab.h> |
David Howells | 760285e | 2012-10-02 18:01:07 +0100 | [diff] [blame] | 39 | #include <drm/drmP.h> |
| 40 | #include <drm/drm_core.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 41 | |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame] | 42 | unsigned int drm_debug = 0; /* 1 to enable debug output */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 43 | EXPORT_SYMBOL(drm_debug); |
| 44 | |
David Herrmann | 1793126 | 2013-08-25 18:29:00 +0200 | [diff] [blame] | 45 | unsigned int drm_rnodes = 0; /* 1 to enable experimental render nodes API */ |
| 46 | EXPORT_SYMBOL(drm_rnodes); |
| 47 | |
Matt Roper | 681e7ec | 2014-04-01 15:22:42 -0700 | [diff] [blame] | 48 | /* 1 to allow user space to request universal planes (experimental) */ |
| 49 | unsigned int drm_universal_planes = 0; |
| 50 | EXPORT_SYMBOL(drm_universal_planes); |
| 51 | |
Mario Kleiner | 27641c3 | 2010-10-23 04:20:23 +0200 | [diff] [blame] | 52 | unsigned int drm_vblank_offdelay = 5000; /* Default to 5000 msecs. */ |
| 53 | EXPORT_SYMBOL(drm_vblank_offdelay); |
| 54 | |
| 55 | unsigned int drm_timestamp_precision = 20; /* Default to 20 usecs. */ |
| 56 | EXPORT_SYMBOL(drm_timestamp_precision); |
| 57 | |
Imre Deak | c61eef7 | 2012-10-23 18:53:26 +0000 | [diff] [blame] | 58 | /* |
| 59 | * Default to use monotonic timestamps for wait-for-vblank and page-flip |
| 60 | * complete events. |
| 61 | */ |
| 62 | unsigned int drm_timestamp_monotonic = 1; |
| 63 | |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame] | 64 | MODULE_AUTHOR(CORE_AUTHOR); |
| 65 | MODULE_DESCRIPTION(CORE_DESC); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 66 | MODULE_LICENSE("GPL and additional rights"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 67 | MODULE_PARM_DESC(debug, "Enable debug output"); |
David Herrmann | 1793126 | 2013-08-25 18:29:00 +0200 | [diff] [blame] | 68 | MODULE_PARM_DESC(rnodes, "Enable experimental render nodes API"); |
Mario Kleiner | 27641c3 | 2010-10-23 04:20:23 +0200 | [diff] [blame] | 69 | MODULE_PARM_DESC(vblankoffdelay, "Delay until vblank irq auto-disable [msecs]"); |
| 70 | MODULE_PARM_DESC(timestamp_precision_usec, "Max. error on timestamps [usecs]"); |
Imre Deak | c61eef7 | 2012-10-23 18:53:26 +0000 | [diff] [blame] | 71 | MODULE_PARM_DESC(timestamp_monotonic, "Use monotonic timestamps"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 72 | |
Dave Jones | c075814 | 2005-10-03 15:02:20 -0400 | [diff] [blame] | 73 | module_param_named(debug, drm_debug, int, 0600); |
David Herrmann | 1793126 | 2013-08-25 18:29:00 +0200 | [diff] [blame] | 74 | module_param_named(rnodes, drm_rnodes, int, 0600); |
Matt Roper | 681e7ec | 2014-04-01 15:22:42 -0700 | [diff] [blame] | 75 | module_param_named(universal_planes, drm_universal_planes, int, 0600); |
Mario Kleiner | 27641c3 | 2010-10-23 04:20:23 +0200 | [diff] [blame] | 76 | module_param_named(vblankoffdelay, drm_vblank_offdelay, int, 0600); |
| 77 | module_param_named(timestamp_precision_usec, drm_timestamp_precision, int, 0600); |
Imre Deak | c61eef7 | 2012-10-23 18:53:26 +0000 | [diff] [blame] | 78 | module_param_named(timestamp_monotonic, drm_timestamp_monotonic, int, 0600); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 79 | |
David Herrmann | 0d63988 | 2014-02-24 15:53:25 +0100 | [diff] [blame] | 80 | static DEFINE_SPINLOCK(drm_minor_lock); |
Dave Airlie | 2c14f28 | 2008-04-21 16:47:32 +1000 | [diff] [blame] | 81 | struct idr drm_minors_idr; |
| 82 | |
Greg Kroah-Hartman | 0650fd5 | 2006-01-20 14:08:59 -0800 | [diff] [blame] | 83 | struct class *drm_class; |
Ben Gamari | 955b12d | 2009-02-17 20:08:49 -0500 | [diff] [blame] | 84 | struct dentry *drm_debugfs_root; |
Joe Perches | 5ad3d88 | 2011-04-17 20:35:51 -0700 | [diff] [blame] | 85 | |
| 86 | int drm_err(const char *func, const char *format, ...) |
| 87 | { |
| 88 | struct va_format vaf; |
| 89 | va_list args; |
| 90 | int r; |
| 91 | |
| 92 | va_start(args, format); |
| 93 | |
| 94 | vaf.fmt = format; |
| 95 | vaf.va = &args; |
| 96 | |
| 97 | r = printk(KERN_ERR "[" DRM_NAME ":%s] *ERROR* %pV", func, &vaf); |
| 98 | |
| 99 | va_end(args); |
| 100 | |
| 101 | return r; |
| 102 | } |
| 103 | EXPORT_SYMBOL(drm_err); |
| 104 | |
Lespiau, Damien | 1287aa9 | 2014-03-24 15:53:17 +0000 | [diff] [blame] | 105 | void drm_ut_debug_printk(const char *function_name, const char *format, ...) |
yakui_zhao | 4fefcb2 | 2009-06-02 14:09:47 +0800 | [diff] [blame] | 106 | { |
Daniel Vetter | fffb906 | 2013-11-17 22:25:02 +0100 | [diff] [blame] | 107 | struct va_format vaf; |
yakui_zhao | 4fefcb2 | 2009-06-02 14:09:47 +0800 | [diff] [blame] | 108 | va_list args; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 109 | |
Lespiau, Damien | a73d4e9 | 2014-03-24 15:53:15 +0000 | [diff] [blame] | 110 | va_start(args, format); |
| 111 | vaf.fmt = format; |
| 112 | vaf.va = &args; |
Daniel Vetter | fffb906 | 2013-11-17 22:25:02 +0100 | [diff] [blame] | 113 | |
Lespiau, Damien | 0ed0298 | 2014-03-24 15:53:18 +0000 | [diff] [blame] | 114 | printk(KERN_DEBUG "[" DRM_NAME ":%s] %pV", function_name, &vaf); |
Lespiau, Damien | a73d4e9 | 2014-03-24 15:53:15 +0000 | [diff] [blame] | 115 | |
| 116 | va_end(args); |
yakui_zhao | 4fefcb2 | 2009-06-02 14:09:47 +0800 | [diff] [blame] | 117 | } |
| 118 | EXPORT_SYMBOL(drm_ut_debug_printk); |
Joe Perches | 5ad3d88 | 2011-04-17 20:35:51 -0700 | [diff] [blame] | 119 | |
Dave Airlie | 7c1c287 | 2008-11-28 14:22:24 +1000 | [diff] [blame] | 120 | struct drm_master *drm_master_create(struct drm_minor *minor) |
| 121 | { |
| 122 | struct drm_master *master; |
| 123 | |
Eric Anholt | 9a298b2 | 2009-03-24 12:23:04 -0700 | [diff] [blame] | 124 | master = kzalloc(sizeof(*master), GFP_KERNEL); |
Dave Airlie | 7c1c287 | 2008-11-28 14:22:24 +1000 | [diff] [blame] | 125 | if (!master) |
| 126 | return NULL; |
| 127 | |
| 128 | kref_init(&master->refcount); |
| 129 | spin_lock_init(&master->lock.spinlock); |
| 130 | init_waitqueue_head(&master->lock.lock_queue); |
Daniel Vetter | 10e6856 | 2014-04-05 11:12:04 +0200 | [diff] [blame] | 131 | if (drm_ht_create(&master->magiclist, DRM_MAGIC_HASH_ORDER)) { |
| 132 | kfree(master); |
| 133 | return NULL; |
| 134 | } |
Dave Airlie | 7c1c287 | 2008-11-28 14:22:24 +1000 | [diff] [blame] | 135 | INIT_LIST_HEAD(&master->magicfree); |
| 136 | master->minor = minor; |
| 137 | |
Dave Airlie | 7c1c287 | 2008-11-28 14:22:24 +1000 | [diff] [blame] | 138 | return master; |
| 139 | } |
| 140 | |
| 141 | struct drm_master *drm_master_get(struct drm_master *master) |
| 142 | { |
| 143 | kref_get(&master->refcount); |
| 144 | return master; |
| 145 | } |
Thomas Hellstrom | 85bb0c3 | 2009-12-06 21:46:28 +0100 | [diff] [blame] | 146 | EXPORT_SYMBOL(drm_master_get); |
Dave Airlie | 7c1c287 | 2008-11-28 14:22:24 +1000 | [diff] [blame] | 147 | |
| 148 | static void drm_master_destroy(struct kref *kref) |
| 149 | { |
| 150 | struct drm_master *master = container_of(kref, struct drm_master, refcount); |
| 151 | struct drm_magic_entry *pt, *next; |
| 152 | struct drm_device *dev = master->minor->dev; |
Dave Airlie | c1ff85d | 2009-01-19 17:17:58 +1000 | [diff] [blame] | 153 | struct drm_map_list *r_list, *list_temp; |
Dave Airlie | 7c1c287 | 2008-11-28 14:22:24 +1000 | [diff] [blame] | 154 | |
Thomas Hellstrom | c996fd0 | 2014-02-25 19:57:44 +0100 | [diff] [blame] | 155 | mutex_lock(&dev->struct_mutex); |
Dave Airlie | 7c1c287 | 2008-11-28 14:22:24 +1000 | [diff] [blame] | 156 | if (dev->driver->master_destroy) |
| 157 | dev->driver->master_destroy(dev, master); |
| 158 | |
Dave Airlie | c1ff85d | 2009-01-19 17:17:58 +1000 | [diff] [blame] | 159 | list_for_each_entry_safe(r_list, list_temp, &dev->maplist, head) { |
| 160 | if (r_list->master == master) { |
| 161 | drm_rmmap_locked(dev, r_list->map); |
| 162 | r_list = NULL; |
| 163 | } |
| 164 | } |
| 165 | |
Dave Airlie | 7c1c287 | 2008-11-28 14:22:24 +1000 | [diff] [blame] | 166 | if (master->unique) { |
Eric Anholt | 9a298b2 | 2009-03-24 12:23:04 -0700 | [diff] [blame] | 167 | kfree(master->unique); |
Dave Airlie | 7c1c287 | 2008-11-28 14:22:24 +1000 | [diff] [blame] | 168 | master->unique = NULL; |
| 169 | master->unique_len = 0; |
| 170 | } |
| 171 | |
| 172 | list_for_each_entry_safe(pt, next, &master->magicfree, head) { |
| 173 | list_del(&pt->head); |
| 174 | drm_ht_remove_item(&master->magiclist, &pt->hash_item); |
Eric Anholt | 9a298b2 | 2009-03-24 12:23:04 -0700 | [diff] [blame] | 175 | kfree(pt); |
Dave Airlie | 7c1c287 | 2008-11-28 14:22:24 +1000 | [diff] [blame] | 176 | } |
| 177 | |
| 178 | drm_ht_remove(&master->magiclist); |
| 179 | |
Thomas Hellstrom | c996fd0 | 2014-02-25 19:57:44 +0100 | [diff] [blame] | 180 | mutex_unlock(&dev->struct_mutex); |
Eric Anholt | 9a298b2 | 2009-03-24 12:23:04 -0700 | [diff] [blame] | 181 | kfree(master); |
Dave Airlie | 7c1c287 | 2008-11-28 14:22:24 +1000 | [diff] [blame] | 182 | } |
| 183 | |
| 184 | void drm_master_put(struct drm_master **master) |
| 185 | { |
| 186 | kref_put(&(*master)->refcount, drm_master_destroy); |
| 187 | *master = NULL; |
| 188 | } |
Thomas Hellstrom | 85bb0c3 | 2009-12-06 21:46:28 +0100 | [diff] [blame] | 189 | EXPORT_SYMBOL(drm_master_put); |
Dave Airlie | 7c1c287 | 2008-11-28 14:22:24 +1000 | [diff] [blame] | 190 | |
| 191 | int drm_setmaster_ioctl(struct drm_device *dev, void *data, |
| 192 | struct drm_file *file_priv) |
| 193 | { |
Benjamin Gaignard | 53ef160 | 2013-06-26 17:58:59 +0200 | [diff] [blame] | 194 | int ret = 0; |
Thomas Hellstrom | 862302f | 2009-12-02 18:15:25 +0000 | [diff] [blame] | 195 | |
Thomas Hellstrom | c996fd0 | 2014-02-25 19:57:44 +0100 | [diff] [blame] | 196 | mutex_lock(&dev->master_mutex); |
Jonas Bonn | 6b00842 | 2009-04-16 09:00:02 +0200 | [diff] [blame] | 197 | if (file_priv->is_master) |
Thomas Hellstrom | c996fd0 | 2014-02-25 19:57:44 +0100 | [diff] [blame] | 198 | goto out_unlock; |
Jonas Bonn | 6b00842 | 2009-04-16 09:00:02 +0200 | [diff] [blame] | 199 | |
Thomas Hellstrom | c996fd0 | 2014-02-25 19:57:44 +0100 | [diff] [blame] | 200 | if (file_priv->minor->master) { |
| 201 | ret = -EINVAL; |
| 202 | goto out_unlock; |
| 203 | } |
Dave Airlie | 7c1c287 | 2008-11-28 14:22:24 +1000 | [diff] [blame] | 204 | |
Thomas Hellstrom | c996fd0 | 2014-02-25 19:57:44 +0100 | [diff] [blame] | 205 | if (!file_priv->master) { |
| 206 | ret = -EINVAL; |
| 207 | goto out_unlock; |
| 208 | } |
Dave Airlie | 7c1c287 | 2008-11-28 14:22:24 +1000 | [diff] [blame] | 209 | |
David Herrmann | 08bec5b | 2012-11-15 13:04:37 +0000 | [diff] [blame] | 210 | file_priv->minor->master = drm_master_get(file_priv->master); |
| 211 | file_priv->is_master = 1; |
| 212 | if (dev->driver->master_set) { |
| 213 | ret = dev->driver->master_set(dev, file_priv, false); |
| 214 | if (unlikely(ret != 0)) { |
| 215 | file_priv->is_master = 0; |
| 216 | drm_master_put(&file_priv->minor->master); |
Thomas Hellstrom | 862302f | 2009-12-02 18:15:25 +0000 | [diff] [blame] | 217 | } |
Dave Airlie | 7c1c287 | 2008-11-28 14:22:24 +1000 | [diff] [blame] | 218 | } |
| 219 | |
Thomas Hellstrom | c996fd0 | 2014-02-25 19:57:44 +0100 | [diff] [blame] | 220 | out_unlock: |
| 221 | mutex_unlock(&dev->master_mutex); |
Benjamin Gaignard | 53ef160 | 2013-06-26 17:58:59 +0200 | [diff] [blame] | 222 | return ret; |
Dave Airlie | 7c1c287 | 2008-11-28 14:22:24 +1000 | [diff] [blame] | 223 | } |
| 224 | |
| 225 | int drm_dropmaster_ioctl(struct drm_device *dev, void *data, |
| 226 | struct drm_file *file_priv) |
| 227 | { |
Thomas Hellstrom | c996fd0 | 2014-02-25 19:57:44 +0100 | [diff] [blame] | 228 | int ret = -EINVAL; |
| 229 | |
| 230 | mutex_lock(&dev->master_mutex); |
Jonas Bonn | 6b00842 | 2009-04-16 09:00:02 +0200 | [diff] [blame] | 231 | if (!file_priv->is_master) |
Thomas Hellstrom | c996fd0 | 2014-02-25 19:57:44 +0100 | [diff] [blame] | 232 | goto out_unlock; |
Jonas Bonn | 6b00842 | 2009-04-16 09:00:02 +0200 | [diff] [blame] | 233 | |
Dave Airlie | 07f1c7a | 2009-04-20 09:32:50 +1000 | [diff] [blame] | 234 | if (!file_priv->minor->master) |
Thomas Hellstrom | c996fd0 | 2014-02-25 19:57:44 +0100 | [diff] [blame] | 235 | goto out_unlock; |
Dave Airlie | 07f1c7a | 2009-04-20 09:32:50 +1000 | [diff] [blame] | 236 | |
Thomas Hellstrom | c996fd0 | 2014-02-25 19:57:44 +0100 | [diff] [blame] | 237 | ret = 0; |
Thomas Hellstrom | 862302f | 2009-12-02 18:15:25 +0000 | [diff] [blame] | 238 | if (dev->driver->master_drop) |
| 239 | dev->driver->master_drop(dev, file_priv, false); |
Dave Airlie | 7c1c287 | 2008-11-28 14:22:24 +1000 | [diff] [blame] | 240 | drm_master_put(&file_priv->minor->master); |
Jonas Bonn | 6b00842 | 2009-04-16 09:00:02 +0200 | [diff] [blame] | 241 | file_priv->is_master = 0; |
Thomas Hellstrom | c996fd0 | 2014-02-25 19:57:44 +0100 | [diff] [blame] | 242 | |
| 243 | out_unlock: |
| 244 | mutex_unlock(&dev->master_mutex); |
| 245 | return ret; |
Dave Airlie | 7c1c287 | 2008-11-28 14:22:24 +1000 | [diff] [blame] | 246 | } |
| 247 | |
David Herrmann | 0d63988 | 2014-02-24 15:53:25 +0100 | [diff] [blame] | 248 | /* |
| 249 | * DRM Minors |
| 250 | * A DRM device can provide several char-dev interfaces on the DRM-Major. Each |
| 251 | * of them is represented by a drm_minor object. Depending on the capabilities |
| 252 | * of the device-driver, different interfaces are registered. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 253 | * |
David Herrmann | 0d63988 | 2014-02-24 15:53:25 +0100 | [diff] [blame] | 254 | * Minors can be accessed via dev->$minor_name. This pointer is either |
| 255 | * NULL or a valid drm_minor pointer and stays valid as long as the device is |
| 256 | * valid. This means, DRM minors have the same life-time as the underlying |
| 257 | * device. However, this doesn't mean that the minor is active. Minors are |
| 258 | * registered and unregistered dynamically according to device-state. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 259 | */ |
David Herrmann | 0d63988 | 2014-02-24 15:53:25 +0100 | [diff] [blame] | 260 | |
David Herrmann | 05b701f | 2014-01-29 12:43:56 +0100 | [diff] [blame] | 261 | static struct drm_minor **drm_minor_get_slot(struct drm_device *dev, |
| 262 | unsigned int type) |
| 263 | { |
| 264 | switch (type) { |
| 265 | case DRM_MINOR_LEGACY: |
| 266 | return &dev->primary; |
| 267 | case DRM_MINOR_RENDER: |
| 268 | return &dev->render; |
| 269 | case DRM_MINOR_CONTROL: |
| 270 | return &dev->control; |
| 271 | default: |
| 272 | return NULL; |
| 273 | } |
| 274 | } |
| 275 | |
| 276 | static int drm_minor_alloc(struct drm_device *dev, unsigned int type) |
| 277 | { |
| 278 | struct drm_minor *minor; |
| 279 | |
| 280 | minor = kzalloc(sizeof(*minor), GFP_KERNEL); |
| 281 | if (!minor) |
| 282 | return -ENOMEM; |
| 283 | |
| 284 | minor->type = type; |
| 285 | minor->dev = dev; |
David Herrmann | 05b701f | 2014-01-29 12:43:56 +0100 | [diff] [blame] | 286 | |
| 287 | *drm_minor_get_slot(dev, type) = minor; |
| 288 | return 0; |
| 289 | } |
| 290 | |
David Herrmann | bd9dfa9 | 2014-01-29 12:55:48 +0100 | [diff] [blame] | 291 | static void drm_minor_free(struct drm_device *dev, unsigned int type) |
| 292 | { |
| 293 | struct drm_minor **slot; |
| 294 | |
| 295 | slot = drm_minor_get_slot(dev, type); |
| 296 | if (*slot) { |
Dave Airlie | ad22279 | 2014-05-02 13:22:19 +1000 | [diff] [blame] | 297 | drm_mode_group_destroy(&(*slot)->mode_group); |
David Herrmann | bd9dfa9 | 2014-01-29 12:55:48 +0100 | [diff] [blame] | 298 | kfree(*slot); |
| 299 | *slot = NULL; |
| 300 | } |
| 301 | } |
| 302 | |
David Herrmann | afcdbc8 | 2014-01-29 12:57:05 +0100 | [diff] [blame] | 303 | static int drm_minor_register(struct drm_device *dev, unsigned int type) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 304 | { |
Dave Airlie | 2c14f28 | 2008-04-21 16:47:32 +1000 | [diff] [blame] | 305 | struct drm_minor *new_minor; |
David Herrmann | 0d63988 | 2014-02-24 15:53:25 +0100 | [diff] [blame] | 306 | unsigned long flags; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 307 | int ret; |
Dave Airlie | 2c14f28 | 2008-04-21 16:47:32 +1000 | [diff] [blame] | 308 | int minor_id; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 309 | |
| 310 | DRM_DEBUG("\n"); |
| 311 | |
David Herrmann | 05b701f | 2014-01-29 12:43:56 +0100 | [diff] [blame] | 312 | new_minor = *drm_minor_get_slot(dev, type); |
| 313 | if (!new_minor) |
| 314 | return 0; |
| 315 | |
David Herrmann | 0d63988 | 2014-02-24 15:53:25 +0100 | [diff] [blame] | 316 | idr_preload(GFP_KERNEL); |
| 317 | spin_lock_irqsave(&drm_minor_lock, flags); |
David Herrmann | 7d86cf1 | 2014-02-24 15:35:09 +0100 | [diff] [blame] | 318 | minor_id = idr_alloc(&drm_minors_idr, |
| 319 | NULL, |
| 320 | 64 * type, |
| 321 | 64 * (type + 1), |
David Herrmann | 0d63988 | 2014-02-24 15:53:25 +0100 | [diff] [blame] | 322 | GFP_NOWAIT); |
| 323 | spin_unlock_irqrestore(&drm_minor_lock, flags); |
| 324 | idr_preload_end(); |
David Herrmann | 7d86cf1 | 2014-02-24 15:35:09 +0100 | [diff] [blame] | 325 | |
Dave Airlie | 2c14f28 | 2008-04-21 16:47:32 +1000 | [diff] [blame] | 326 | if (minor_id < 0) |
| 327 | return minor_id; |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame] | 328 | |
Dave Airlie | 2c14f28 | 2008-04-21 16:47:32 +1000 | [diff] [blame] | 329 | new_minor->index = minor_id; |
| 330 | |
Ben Gamari | 955b12d | 2009-02-17 20:08:49 -0500 | [diff] [blame] | 331 | ret = drm_debugfs_init(new_minor, minor_id, drm_debugfs_root); |
| 332 | if (ret) { |
GeunSik Lim | 156f5a7 | 2009-06-02 15:01:37 +0900 | [diff] [blame] | 333 | DRM_ERROR("DRM: Failed to initialize /sys/kernel/debug/dri.\n"); |
David Herrmann | 1abbc43 | 2014-02-24 15:32:00 +0100 | [diff] [blame] | 334 | goto err_id; |
Ben Gamari | 955b12d | 2009-02-17 20:08:49 -0500 | [diff] [blame] | 335 | } |
Dave Airlie | 2c14f28 | 2008-04-21 16:47:32 +1000 | [diff] [blame] | 336 | |
| 337 | ret = drm_sysfs_device_add(new_minor); |
| 338 | if (ret) { |
David Herrmann | 1abbc43 | 2014-02-24 15:32:00 +0100 | [diff] [blame] | 339 | DRM_ERROR("DRM: Error sysfs_device_add.\n"); |
Daniel Vetter | cb6458f | 2013-08-08 15:41:34 +0200 | [diff] [blame] | 340 | goto err_debugfs; |
Dave Airlie | 2c14f28 | 2008-04-21 16:47:32 +1000 | [diff] [blame] | 341 | } |
Dave Airlie | 2c14f28 | 2008-04-21 16:47:32 +1000 | [diff] [blame] | 342 | |
David Herrmann | 0d63988 | 2014-02-24 15:53:25 +0100 | [diff] [blame] | 343 | /* replace NULL with @minor so lookups will succeed from now on */ |
| 344 | spin_lock_irqsave(&drm_minor_lock, flags); |
| 345 | idr_replace(&drm_minors_idr, new_minor, new_minor->index); |
| 346 | spin_unlock_irqrestore(&drm_minor_lock, flags); |
Dave Airlie | 2c14f28 | 2008-04-21 16:47:32 +1000 | [diff] [blame] | 347 | |
| 348 | DRM_DEBUG("new minor assigned %d\n", minor_id); |
| 349 | return 0; |
| 350 | |
Daniel Vetter | cb6458f | 2013-08-08 15:41:34 +0200 | [diff] [blame] | 351 | err_debugfs: |
Daniel Vetter | cb6458f | 2013-08-08 15:41:34 +0200 | [diff] [blame] | 352 | drm_debugfs_cleanup(new_minor); |
David Herrmann | 1abbc43 | 2014-02-24 15:32:00 +0100 | [diff] [blame] | 353 | err_id: |
David Herrmann | 0d63988 | 2014-02-24 15:53:25 +0100 | [diff] [blame] | 354 | spin_lock_irqsave(&drm_minor_lock, flags); |
Dave Airlie | 2c14f28 | 2008-04-21 16:47:32 +1000 | [diff] [blame] | 355 | idr_remove(&drm_minors_idr, minor_id); |
David Herrmann | 0d63988 | 2014-02-24 15:53:25 +0100 | [diff] [blame] | 356 | spin_unlock_irqrestore(&drm_minor_lock, flags); |
| 357 | new_minor->index = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 358 | return ret; |
| 359 | } |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame] | 360 | |
David Herrmann | afcdbc8 | 2014-01-29 12:57:05 +0100 | [diff] [blame] | 361 | static void drm_minor_unregister(struct drm_device *dev, unsigned int type) |
David Herrmann | f73aca5 | 2013-10-20 18:55:40 +0200 | [diff] [blame] | 362 | { |
David Herrmann | afcdbc8 | 2014-01-29 12:57:05 +0100 | [diff] [blame] | 363 | struct drm_minor *minor; |
David Herrmann | 0d63988 | 2014-02-24 15:53:25 +0100 | [diff] [blame] | 364 | unsigned long flags; |
David Herrmann | afcdbc8 | 2014-01-29 12:57:05 +0100 | [diff] [blame] | 365 | |
| 366 | minor = *drm_minor_get_slot(dev, type); |
David Herrmann | a348335 | 2013-11-13 11:42:26 +0100 | [diff] [blame] | 367 | if (!minor || !minor->kdev) |
David Herrmann | f73aca5 | 2013-10-20 18:55:40 +0200 | [diff] [blame] | 368 | return; |
| 369 | |
David Herrmann | 0d63988 | 2014-02-24 15:53:25 +0100 | [diff] [blame] | 370 | spin_lock_irqsave(&drm_minor_lock, flags); |
David Herrmann | f67e946 | 2013-10-20 18:55:44 +0200 | [diff] [blame] | 371 | idr_remove(&drm_minors_idr, minor->index); |
David Herrmann | 0d63988 | 2014-02-24 15:53:25 +0100 | [diff] [blame] | 372 | spin_unlock_irqrestore(&drm_minor_lock, flags); |
| 373 | minor->index = 0; |
| 374 | |
David Herrmann | 865fb47 | 2013-10-20 18:55:43 +0200 | [diff] [blame] | 375 | drm_debugfs_cleanup(minor); |
David Herrmann | 865fb47 | 2013-10-20 18:55:43 +0200 | [diff] [blame] | 376 | drm_sysfs_device_remove(minor); |
David Herrmann | f73aca5 | 2013-10-20 18:55:40 +0200 | [diff] [blame] | 377 | } |
| 378 | |
| 379 | /** |
David Herrmann | 1616c52 | 2014-01-29 10:49:19 +0100 | [diff] [blame] | 380 | * drm_minor_acquire - Acquire a DRM minor |
| 381 | * @minor_id: Minor ID of the DRM-minor |
David Herrmann | f73aca5 | 2013-10-20 18:55:40 +0200 | [diff] [blame] | 382 | * |
David Herrmann | 1616c52 | 2014-01-29 10:49:19 +0100 | [diff] [blame] | 383 | * Looks up the given minor-ID and returns the respective DRM-minor object. The |
| 384 | * refence-count of the underlying device is increased so you must release this |
| 385 | * object with drm_minor_release(). |
| 386 | * |
| 387 | * As long as you hold this minor, it is guaranteed that the object and the |
| 388 | * minor->dev pointer will stay valid! However, the device may get unplugged and |
| 389 | * unregistered while you hold the minor. |
| 390 | * |
| 391 | * Returns: |
| 392 | * Pointer to minor-object with increased device-refcount, or PTR_ERR on |
| 393 | * failure. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 394 | */ |
David Herrmann | 1616c52 | 2014-01-29 10:49:19 +0100 | [diff] [blame] | 395 | struct drm_minor *drm_minor_acquire(unsigned int minor_id) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 396 | { |
David Herrmann | 1616c52 | 2014-01-29 10:49:19 +0100 | [diff] [blame] | 397 | struct drm_minor *minor; |
David Herrmann | 0d63988 | 2014-02-24 15:53:25 +0100 | [diff] [blame] | 398 | unsigned long flags; |
Eric Anholt | 673a394 | 2008-07-30 12:06:12 -0700 | [diff] [blame] | 399 | |
David Herrmann | 0d63988 | 2014-02-24 15:53:25 +0100 | [diff] [blame] | 400 | spin_lock_irqsave(&drm_minor_lock, flags); |
David Herrmann | 1616c52 | 2014-01-29 10:49:19 +0100 | [diff] [blame] | 401 | minor = idr_find(&drm_minors_idr, minor_id); |
David Herrmann | 0d63988 | 2014-02-24 15:53:25 +0100 | [diff] [blame] | 402 | if (minor) |
| 403 | drm_dev_ref(minor->dev); |
| 404 | spin_unlock_irqrestore(&drm_minor_lock, flags); |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame] | 405 | |
David Herrmann | 0d63988 | 2014-02-24 15:53:25 +0100 | [diff] [blame] | 406 | if (!minor) { |
| 407 | return ERR_PTR(-ENODEV); |
| 408 | } else if (drm_device_is_unplugged(minor->dev)) { |
| 409 | drm_dev_unref(minor->dev); |
| 410 | return ERR_PTR(-ENODEV); |
| 411 | } |
| 412 | |
David Herrmann | 1616c52 | 2014-01-29 10:49:19 +0100 | [diff] [blame] | 413 | return minor; |
| 414 | } |
| 415 | |
| 416 | /** |
| 417 | * drm_minor_release - Release DRM minor |
| 418 | * @minor: Pointer to DRM minor object |
| 419 | * |
| 420 | * Release a minor that was previously acquired via drm_minor_acquire(). |
| 421 | */ |
| 422 | void drm_minor_release(struct drm_minor *minor) |
| 423 | { |
| 424 | drm_dev_unref(minor->dev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 425 | } |
Kristian Høgsberg | 112b715 | 2009-01-04 16:55:33 -0500 | [diff] [blame] | 426 | |
| 427 | /** |
| 428 | * Called via drm_exit() at module unload time or when pci device is |
| 429 | * unplugged. |
| 430 | * |
| 431 | * Cleans up all DRM device, calling drm_lastclose(). |
| 432 | * |
Kristian Høgsberg | 112b715 | 2009-01-04 16:55:33 -0500 | [diff] [blame] | 433 | */ |
| 434 | void drm_put_dev(struct drm_device *dev) |
| 435 | { |
Kristian Høgsberg | 112b715 | 2009-01-04 16:55:33 -0500 | [diff] [blame] | 436 | DRM_DEBUG("\n"); |
| 437 | |
| 438 | if (!dev) { |
| 439 | DRM_ERROR("cleanup called no dev\n"); |
| 440 | return; |
| 441 | } |
| 442 | |
David Herrmann | c3a4973 | 2013-10-02 11:23:38 +0200 | [diff] [blame] | 443 | drm_dev_unregister(dev); |
David Herrmann | 099d1c2 | 2014-01-29 10:21:36 +0100 | [diff] [blame] | 444 | drm_dev_unref(dev); |
Kristian Høgsberg | 112b715 | 2009-01-04 16:55:33 -0500 | [diff] [blame] | 445 | } |
| 446 | EXPORT_SYMBOL(drm_put_dev); |
Dave Airlie | 2c07a21 | 2012-02-20 14:18:07 +0000 | [diff] [blame] | 447 | |
| 448 | void drm_unplug_dev(struct drm_device *dev) |
| 449 | { |
| 450 | /* for a USB device */ |
David Herrmann | afcdbc8 | 2014-01-29 12:57:05 +0100 | [diff] [blame] | 451 | drm_minor_unregister(dev, DRM_MINOR_LEGACY); |
| 452 | drm_minor_unregister(dev, DRM_MINOR_RENDER); |
| 453 | drm_minor_unregister(dev, DRM_MINOR_CONTROL); |
Dave Airlie | 2c07a21 | 2012-02-20 14:18:07 +0000 | [diff] [blame] | 454 | |
| 455 | mutex_lock(&drm_global_mutex); |
| 456 | |
| 457 | drm_device_set_unplugged(dev); |
| 458 | |
| 459 | if (dev->open_count == 0) { |
| 460 | drm_put_dev(dev); |
| 461 | } |
| 462 | mutex_unlock(&drm_global_mutex); |
| 463 | } |
| 464 | EXPORT_SYMBOL(drm_unplug_dev); |
David Herrmann | 1bb7253 | 2013-10-02 11:23:34 +0200 | [diff] [blame] | 465 | |
David Herrmann | 31bbe16 | 2014-01-03 14:09:47 +0100 | [diff] [blame] | 466 | /* |
| 467 | * DRM internal mount |
| 468 | * We want to be able to allocate our own "struct address_space" to control |
| 469 | * memory-mappings in VRAM (or stolen RAM, ...). However, core MM does not allow |
| 470 | * stand-alone address_space objects, so we need an underlying inode. As there |
| 471 | * is no way to allocate an independent inode easily, we need a fake internal |
| 472 | * VFS mount-point. |
| 473 | * |
| 474 | * The drm_fs_inode_new() function allocates a new inode, drm_fs_inode_free() |
| 475 | * frees it again. You are allowed to use iget() and iput() to get references to |
| 476 | * the inode. But each drm_fs_inode_new() call must be paired with exactly one |
| 477 | * drm_fs_inode_free() call (which does not have to be the last iput()). |
| 478 | * We use drm_fs_inode_*() to manage our internal VFS mount-point and share it |
| 479 | * between multiple inode-users. You could, technically, call |
| 480 | * iget() + drm_fs_inode_free() directly after alloc and sometime later do an |
| 481 | * iput(), but this way you'd end up with a new vfsmount for each inode. |
| 482 | */ |
| 483 | |
| 484 | static int drm_fs_cnt; |
| 485 | static struct vfsmount *drm_fs_mnt; |
| 486 | |
| 487 | static const struct dentry_operations drm_fs_dops = { |
| 488 | .d_dname = simple_dname, |
| 489 | }; |
| 490 | |
| 491 | static const struct super_operations drm_fs_sops = { |
| 492 | .statfs = simple_statfs, |
| 493 | }; |
| 494 | |
| 495 | static struct dentry *drm_fs_mount(struct file_system_type *fs_type, int flags, |
| 496 | const char *dev_name, void *data) |
| 497 | { |
| 498 | return mount_pseudo(fs_type, |
| 499 | "drm:", |
| 500 | &drm_fs_sops, |
| 501 | &drm_fs_dops, |
| 502 | 0x010203ff); |
| 503 | } |
| 504 | |
| 505 | static struct file_system_type drm_fs_type = { |
| 506 | .name = "drm", |
| 507 | .owner = THIS_MODULE, |
| 508 | .mount = drm_fs_mount, |
| 509 | .kill_sb = kill_anon_super, |
| 510 | }; |
| 511 | |
| 512 | static struct inode *drm_fs_inode_new(void) |
| 513 | { |
| 514 | struct inode *inode; |
| 515 | int r; |
| 516 | |
| 517 | r = simple_pin_fs(&drm_fs_type, &drm_fs_mnt, &drm_fs_cnt); |
| 518 | if (r < 0) { |
| 519 | DRM_ERROR("Cannot mount pseudo fs: %d\n", r); |
| 520 | return ERR_PTR(r); |
| 521 | } |
| 522 | |
| 523 | inode = alloc_anon_inode(drm_fs_mnt->mnt_sb); |
| 524 | if (IS_ERR(inode)) |
| 525 | simple_release_fs(&drm_fs_mnt, &drm_fs_cnt); |
| 526 | |
| 527 | return inode; |
| 528 | } |
| 529 | |
| 530 | static void drm_fs_inode_free(struct inode *inode) |
| 531 | { |
| 532 | if (inode) { |
| 533 | iput(inode); |
| 534 | simple_release_fs(&drm_fs_mnt, &drm_fs_cnt); |
| 535 | } |
| 536 | } |
| 537 | |
David Herrmann | 1bb7253 | 2013-10-02 11:23:34 +0200 | [diff] [blame] | 538 | /** |
| 539 | * drm_dev_alloc - Allocate new drm device |
| 540 | * @driver: DRM driver to allocate device for |
| 541 | * @parent: Parent device object |
| 542 | * |
| 543 | * Allocate and initialize a new DRM device. No device registration is done. |
David Herrmann | c22f0ac | 2013-10-02 11:23:35 +0200 | [diff] [blame] | 544 | * Call drm_dev_register() to advertice the device to user space and register it |
| 545 | * with other core subsystems. |
David Herrmann | 1bb7253 | 2013-10-02 11:23:34 +0200 | [diff] [blame] | 546 | * |
David Herrmann | 099d1c2 | 2014-01-29 10:21:36 +0100 | [diff] [blame] | 547 | * The initial ref-count of the object is 1. Use drm_dev_ref() and |
| 548 | * drm_dev_unref() to take and drop further ref-counts. |
| 549 | * |
David Herrmann | 1bb7253 | 2013-10-02 11:23:34 +0200 | [diff] [blame] | 550 | * RETURNS: |
| 551 | * Pointer to new DRM device, or NULL if out of memory. |
| 552 | */ |
| 553 | struct drm_device *drm_dev_alloc(struct drm_driver *driver, |
| 554 | struct device *parent) |
| 555 | { |
| 556 | struct drm_device *dev; |
| 557 | int ret; |
| 558 | |
| 559 | dev = kzalloc(sizeof(*dev), GFP_KERNEL); |
| 560 | if (!dev) |
| 561 | return NULL; |
| 562 | |
David Herrmann | 099d1c2 | 2014-01-29 10:21:36 +0100 | [diff] [blame] | 563 | kref_init(&dev->ref); |
David Herrmann | 1bb7253 | 2013-10-02 11:23:34 +0200 | [diff] [blame] | 564 | dev->dev = parent; |
| 565 | dev->driver = driver; |
| 566 | |
| 567 | INIT_LIST_HEAD(&dev->filelist); |
| 568 | INIT_LIST_HEAD(&dev->ctxlist); |
| 569 | INIT_LIST_HEAD(&dev->vmalist); |
| 570 | INIT_LIST_HEAD(&dev->maplist); |
| 571 | INIT_LIST_HEAD(&dev->vblank_event_list); |
| 572 | |
Daniel Vetter | 2177a21 | 2013-12-16 11:21:06 +0100 | [diff] [blame] | 573 | spin_lock_init(&dev->buf_lock); |
David Herrmann | 1bb7253 | 2013-10-02 11:23:34 +0200 | [diff] [blame] | 574 | spin_lock_init(&dev->event_lock); |
| 575 | mutex_init(&dev->struct_mutex); |
| 576 | mutex_init(&dev->ctxlist_mutex); |
Thomas Hellstrom | c996fd0 | 2014-02-25 19:57:44 +0100 | [diff] [blame] | 577 | mutex_init(&dev->master_mutex); |
David Herrmann | 1bb7253 | 2013-10-02 11:23:34 +0200 | [diff] [blame] | 578 | |
David Herrmann | 6796cb1 | 2014-01-03 14:24:19 +0100 | [diff] [blame] | 579 | dev->anon_inode = drm_fs_inode_new(); |
| 580 | if (IS_ERR(dev->anon_inode)) { |
| 581 | ret = PTR_ERR(dev->anon_inode); |
| 582 | DRM_ERROR("Cannot allocate anonymous inode: %d\n", ret); |
David Herrmann | 1bb7253 | 2013-10-02 11:23:34 +0200 | [diff] [blame] | 583 | goto err_free; |
David Herrmann | 6796cb1 | 2014-01-03 14:24:19 +0100 | [diff] [blame] | 584 | } |
| 585 | |
David Herrmann | 05b701f | 2014-01-29 12:43:56 +0100 | [diff] [blame] | 586 | if (drm_core_check_feature(dev, DRIVER_MODESET)) { |
| 587 | ret = drm_minor_alloc(dev, DRM_MINOR_CONTROL); |
| 588 | if (ret) |
| 589 | goto err_minors; |
| 590 | } |
| 591 | |
| 592 | if (drm_core_check_feature(dev, DRIVER_RENDER) && drm_rnodes) { |
| 593 | ret = drm_minor_alloc(dev, DRM_MINOR_RENDER); |
| 594 | if (ret) |
| 595 | goto err_minors; |
| 596 | } |
| 597 | |
| 598 | ret = drm_minor_alloc(dev, DRM_MINOR_LEGACY); |
| 599 | if (ret) |
| 600 | goto err_minors; |
| 601 | |
David Herrmann | 6796cb1 | 2014-01-03 14:24:19 +0100 | [diff] [blame] | 602 | if (drm_ht_create(&dev->map_hash, 12)) |
David Herrmann | 05b701f | 2014-01-29 12:43:56 +0100 | [diff] [blame] | 603 | goto err_minors; |
David Herrmann | 1bb7253 | 2013-10-02 11:23:34 +0200 | [diff] [blame] | 604 | |
| 605 | ret = drm_ctxbitmap_init(dev); |
| 606 | if (ret) { |
| 607 | DRM_ERROR("Cannot allocate memory for context bitmap.\n"); |
| 608 | goto err_ht; |
| 609 | } |
| 610 | |
| 611 | if (driver->driver_features & DRIVER_GEM) { |
| 612 | ret = drm_gem_init(dev); |
| 613 | if (ret) { |
| 614 | DRM_ERROR("Cannot initialize graphics execution manager (GEM)\n"); |
| 615 | goto err_ctxbitmap; |
| 616 | } |
| 617 | } |
| 618 | |
| 619 | return dev; |
| 620 | |
| 621 | err_ctxbitmap: |
| 622 | drm_ctxbitmap_cleanup(dev); |
| 623 | err_ht: |
| 624 | drm_ht_remove(&dev->map_hash); |
David Herrmann | 05b701f | 2014-01-29 12:43:56 +0100 | [diff] [blame] | 625 | err_minors: |
David Herrmann | bd9dfa9 | 2014-01-29 12:55:48 +0100 | [diff] [blame] | 626 | drm_minor_free(dev, DRM_MINOR_LEGACY); |
| 627 | drm_minor_free(dev, DRM_MINOR_RENDER); |
| 628 | drm_minor_free(dev, DRM_MINOR_CONTROL); |
David Herrmann | 6796cb1 | 2014-01-03 14:24:19 +0100 | [diff] [blame] | 629 | drm_fs_inode_free(dev->anon_inode); |
David Herrmann | 1bb7253 | 2013-10-02 11:23:34 +0200 | [diff] [blame] | 630 | err_free: |
Thomas Hellstrom | c996fd0 | 2014-02-25 19:57:44 +0100 | [diff] [blame] | 631 | mutex_destroy(&dev->master_mutex); |
David Herrmann | 1bb7253 | 2013-10-02 11:23:34 +0200 | [diff] [blame] | 632 | kfree(dev); |
| 633 | return NULL; |
| 634 | } |
| 635 | EXPORT_SYMBOL(drm_dev_alloc); |
David Herrmann | c22f0ac | 2013-10-02 11:23:35 +0200 | [diff] [blame] | 636 | |
David Herrmann | 099d1c2 | 2014-01-29 10:21:36 +0100 | [diff] [blame] | 637 | static void drm_dev_release(struct kref *ref) |
David Herrmann | 0dc8fe5 | 2013-10-02 11:23:37 +0200 | [diff] [blame] | 638 | { |
David Herrmann | 099d1c2 | 2014-01-29 10:21:36 +0100 | [diff] [blame] | 639 | struct drm_device *dev = container_of(ref, struct drm_device, ref); |
David Herrmann | 8f6599d | 2013-10-20 18:55:45 +0200 | [diff] [blame] | 640 | |
David Herrmann | 0dc8fe5 | 2013-10-02 11:23:37 +0200 | [diff] [blame] | 641 | if (dev->driver->driver_features & DRIVER_GEM) |
| 642 | drm_gem_destroy(dev); |
| 643 | |
| 644 | drm_ctxbitmap_cleanup(dev); |
| 645 | drm_ht_remove(&dev->map_hash); |
David Herrmann | 6796cb1 | 2014-01-03 14:24:19 +0100 | [diff] [blame] | 646 | drm_fs_inode_free(dev->anon_inode); |
David Herrmann | 0dc8fe5 | 2013-10-02 11:23:37 +0200 | [diff] [blame] | 647 | |
David Herrmann | bd9dfa9 | 2014-01-29 12:55:48 +0100 | [diff] [blame] | 648 | drm_minor_free(dev, DRM_MINOR_LEGACY); |
| 649 | drm_minor_free(dev, DRM_MINOR_RENDER); |
| 650 | drm_minor_free(dev, DRM_MINOR_CONTROL); |
| 651 | |
Thomas Hellstrom | c996fd0 | 2014-02-25 19:57:44 +0100 | [diff] [blame] | 652 | mutex_destroy(&dev->master_mutex); |
Thierry Reding | ca8e2ad | 2014-04-11 15:23:00 +0200 | [diff] [blame^] | 653 | kfree(dev->unique); |
David Herrmann | 0dc8fe5 | 2013-10-02 11:23:37 +0200 | [diff] [blame] | 654 | kfree(dev); |
| 655 | } |
David Herrmann | 099d1c2 | 2014-01-29 10:21:36 +0100 | [diff] [blame] | 656 | |
| 657 | /** |
| 658 | * drm_dev_ref - Take reference of a DRM device |
| 659 | * @dev: device to take reference of or NULL |
| 660 | * |
| 661 | * This increases the ref-count of @dev by one. You *must* already own a |
| 662 | * reference when calling this. Use drm_dev_unref() to drop this reference |
| 663 | * again. |
| 664 | * |
| 665 | * This function never fails. However, this function does not provide *any* |
| 666 | * guarantee whether the device is alive or running. It only provides a |
| 667 | * reference to the object and the memory associated with it. |
| 668 | */ |
| 669 | void drm_dev_ref(struct drm_device *dev) |
| 670 | { |
| 671 | if (dev) |
| 672 | kref_get(&dev->ref); |
| 673 | } |
| 674 | EXPORT_SYMBOL(drm_dev_ref); |
| 675 | |
| 676 | /** |
| 677 | * drm_dev_unref - Drop reference of a DRM device |
| 678 | * @dev: device to drop reference of or NULL |
| 679 | * |
| 680 | * This decreases the ref-count of @dev by one. The device is destroyed if the |
| 681 | * ref-count drops to zero. |
| 682 | */ |
| 683 | void drm_dev_unref(struct drm_device *dev) |
| 684 | { |
| 685 | if (dev) |
| 686 | kref_put(&dev->ref, drm_dev_release); |
| 687 | } |
| 688 | EXPORT_SYMBOL(drm_dev_unref); |
David Herrmann | 0dc8fe5 | 2013-10-02 11:23:37 +0200 | [diff] [blame] | 689 | |
| 690 | /** |
David Herrmann | c22f0ac | 2013-10-02 11:23:35 +0200 | [diff] [blame] | 691 | * drm_dev_register - Register DRM device |
| 692 | * @dev: Device to register |
| 693 | * |
| 694 | * Register the DRM device @dev with the system, advertise device to user-space |
| 695 | * and start normal device operation. @dev must be allocated via drm_dev_alloc() |
| 696 | * previously. |
| 697 | * |
| 698 | * Never call this twice on any device! |
| 699 | * |
| 700 | * RETURNS: |
| 701 | * 0 on success, negative error code on failure. |
| 702 | */ |
| 703 | int drm_dev_register(struct drm_device *dev, unsigned long flags) |
| 704 | { |
| 705 | int ret; |
| 706 | |
| 707 | mutex_lock(&drm_global_mutex); |
| 708 | |
David Herrmann | afcdbc8 | 2014-01-29 12:57:05 +0100 | [diff] [blame] | 709 | ret = drm_minor_register(dev, DRM_MINOR_CONTROL); |
David Herrmann | c22f0ac | 2013-10-02 11:23:35 +0200 | [diff] [blame] | 710 | if (ret) |
David Herrmann | 05b701f | 2014-01-29 12:43:56 +0100 | [diff] [blame] | 711 | goto err_minors; |
| 712 | |
David Herrmann | afcdbc8 | 2014-01-29 12:57:05 +0100 | [diff] [blame] | 713 | ret = drm_minor_register(dev, DRM_MINOR_RENDER); |
David Herrmann | 05b701f | 2014-01-29 12:43:56 +0100 | [diff] [blame] | 714 | if (ret) |
| 715 | goto err_minors; |
| 716 | |
David Herrmann | afcdbc8 | 2014-01-29 12:57:05 +0100 | [diff] [blame] | 717 | ret = drm_minor_register(dev, DRM_MINOR_LEGACY); |
David Herrmann | 05b701f | 2014-01-29 12:43:56 +0100 | [diff] [blame] | 718 | if (ret) |
| 719 | goto err_minors; |
David Herrmann | c22f0ac | 2013-10-02 11:23:35 +0200 | [diff] [blame] | 720 | |
| 721 | if (dev->driver->load) { |
| 722 | ret = dev->driver->load(dev, flags); |
| 723 | if (ret) |
David Herrmann | 05b701f | 2014-01-29 12:43:56 +0100 | [diff] [blame] | 724 | goto err_minors; |
David Herrmann | c22f0ac | 2013-10-02 11:23:35 +0200 | [diff] [blame] | 725 | } |
| 726 | |
| 727 | /* setup grouping for legacy outputs */ |
| 728 | if (drm_core_check_feature(dev, DRIVER_MODESET)) { |
| 729 | ret = drm_mode_group_init_legacy_group(dev, |
| 730 | &dev->primary->mode_group); |
| 731 | if (ret) |
| 732 | goto err_unload; |
| 733 | } |
| 734 | |
David Herrmann | c22f0ac | 2013-10-02 11:23:35 +0200 | [diff] [blame] | 735 | ret = 0; |
| 736 | goto out_unlock; |
| 737 | |
| 738 | err_unload: |
| 739 | if (dev->driver->unload) |
| 740 | dev->driver->unload(dev); |
David Herrmann | 05b701f | 2014-01-29 12:43:56 +0100 | [diff] [blame] | 741 | err_minors: |
David Herrmann | afcdbc8 | 2014-01-29 12:57:05 +0100 | [diff] [blame] | 742 | drm_minor_unregister(dev, DRM_MINOR_LEGACY); |
| 743 | drm_minor_unregister(dev, DRM_MINOR_RENDER); |
| 744 | drm_minor_unregister(dev, DRM_MINOR_CONTROL); |
David Herrmann | c22f0ac | 2013-10-02 11:23:35 +0200 | [diff] [blame] | 745 | out_unlock: |
| 746 | mutex_unlock(&drm_global_mutex); |
| 747 | return ret; |
| 748 | } |
| 749 | EXPORT_SYMBOL(drm_dev_register); |
David Herrmann | c3a4973 | 2013-10-02 11:23:38 +0200 | [diff] [blame] | 750 | |
| 751 | /** |
| 752 | * drm_dev_unregister - Unregister DRM device |
| 753 | * @dev: Device to unregister |
| 754 | * |
| 755 | * Unregister the DRM device from the system. This does the reverse of |
| 756 | * drm_dev_register() but does not deallocate the device. The caller must call |
David Herrmann | 099d1c2 | 2014-01-29 10:21:36 +0100 | [diff] [blame] | 757 | * drm_dev_unref() to drop their final reference. |
David Herrmann | c3a4973 | 2013-10-02 11:23:38 +0200 | [diff] [blame] | 758 | */ |
| 759 | void drm_dev_unregister(struct drm_device *dev) |
| 760 | { |
| 761 | struct drm_map_list *r_list, *list_temp; |
| 762 | |
| 763 | drm_lastclose(dev); |
| 764 | |
| 765 | if (dev->driver->unload) |
| 766 | dev->driver->unload(dev); |
| 767 | |
Daniel Vetter | 4efafeb | 2013-12-11 11:34:38 +0100 | [diff] [blame] | 768 | if (dev->agp) |
| 769 | drm_pci_agp_destroy(dev); |
David Herrmann | c3a4973 | 2013-10-02 11:23:38 +0200 | [diff] [blame] | 770 | |
| 771 | drm_vblank_cleanup(dev); |
| 772 | |
| 773 | list_for_each_entry_safe(r_list, list_temp, &dev->maplist, head) |
| 774 | drm_rmmap(dev, r_list->map); |
| 775 | |
David Herrmann | afcdbc8 | 2014-01-29 12:57:05 +0100 | [diff] [blame] | 776 | drm_minor_unregister(dev, DRM_MINOR_LEGACY); |
| 777 | drm_minor_unregister(dev, DRM_MINOR_RENDER); |
| 778 | drm_minor_unregister(dev, DRM_MINOR_CONTROL); |
David Herrmann | c3a4973 | 2013-10-02 11:23:38 +0200 | [diff] [blame] | 779 | } |
| 780 | EXPORT_SYMBOL(drm_dev_unregister); |
Thierry Reding | ca8e2ad | 2014-04-11 15:23:00 +0200 | [diff] [blame^] | 781 | |
| 782 | /** |
| 783 | * drm_dev_set_unique - Set the unique name of a DRM device |
| 784 | * @dev: device of which to set the unique name |
| 785 | * @fmt: format string for unique name |
| 786 | * |
| 787 | * Sets the unique name of a DRM device using the specified format string and |
| 788 | * a variable list of arguments. Drivers can use this at driver probe time if |
| 789 | * the unique name of the devices they drive is static. |
| 790 | * |
| 791 | * Return: 0 on success or a negative error code on failure. |
| 792 | */ |
| 793 | int drm_dev_set_unique(struct drm_device *dev, const char *fmt, ...) |
| 794 | { |
| 795 | va_list ap; |
| 796 | |
| 797 | kfree(dev->unique); |
| 798 | |
| 799 | va_start(ap, fmt); |
| 800 | dev->unique = kvasprintf(GFP_KERNEL, fmt, ap); |
| 801 | va_end(ap); |
| 802 | |
| 803 | return dev->unique ? 0 : -ENOMEM; |
| 804 | } |
| 805 | EXPORT_SYMBOL(drm_dev_set_unique); |