Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | /* |
| 2 | * Created: Fri Jan 19 10:48:35 2001 by faith@acm.org |
| 3 | * |
| 4 | * Copyright 2001 VA Linux Systems, Inc., Sunnyvale, California. |
| 5 | * All Rights Reserved. |
| 6 | * |
Thierry Reding | c6a1af8a | 2014-05-19 13:39:07 +0200 | [diff] [blame] | 7 | * Author Rickard E. (Rik) Faith <faith@valinux.com> |
| 8 | * |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 9 | * Permission is hereby granted, free of charge, to any person obtaining a |
| 10 | * copy of this software and associated documentation files (the "Software"), |
| 11 | * to deal in the Software without restriction, including without limitation |
| 12 | * the rights to use, copy, modify, merge, publish, distribute, sublicense, |
| 13 | * and/or sell copies of the Software, and to permit persons to whom the |
| 14 | * Software is furnished to do so, subject to the following conditions: |
| 15 | * |
| 16 | * The above copyright notice and this permission notice (including the next |
| 17 | * paragraph) shall be included in all copies or substantial portions of the |
| 18 | * Software. |
| 19 | * |
| 20 | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR |
| 21 | * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, |
| 22 | * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL |
| 23 | * PRECISION INSIGHT AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM, DAMAGES OR |
| 24 | * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, |
| 25 | * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER |
| 26 | * DEALINGS IN THE SOFTWARE. |
| 27 | */ |
| 28 | |
David Herrmann | 1b7199f | 2014-07-23 12:29:56 +0200 | [diff] [blame^] | 29 | #include <linux/debugfs.h> |
David Herrmann | 31bbe16 | 2014-01-03 14:09:47 +0100 | [diff] [blame] | 30 | #include <linux/fs.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 31 | #include <linux/module.h> |
| 32 | #include <linux/moduleparam.h> |
David Herrmann | 31bbe16 | 2014-01-03 14:09:47 +0100 | [diff] [blame] | 33 | #include <linux/mount.h> |
Tejun Heo | 5a0e3ad | 2010-03-24 17:04:11 +0900 | [diff] [blame] | 34 | #include <linux/slab.h> |
David Howells | 760285e | 2012-10-02 18:01:07 +0100 | [diff] [blame] | 35 | #include <drm/drmP.h> |
| 36 | #include <drm/drm_core.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 37 | |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame] | 38 | unsigned int drm_debug = 0; /* 1 to enable debug output */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 39 | EXPORT_SYMBOL(drm_debug); |
| 40 | |
Mario Kleiner | 27641c3 | 2010-10-23 04:20:23 +0200 | [diff] [blame] | 41 | unsigned int drm_vblank_offdelay = 5000; /* Default to 5000 msecs. */ |
Mario Kleiner | 27641c3 | 2010-10-23 04:20:23 +0200 | [diff] [blame] | 42 | |
| 43 | unsigned int drm_timestamp_precision = 20; /* Default to 20 usecs. */ |
Mario Kleiner | 27641c3 | 2010-10-23 04:20:23 +0200 | [diff] [blame] | 44 | |
Imre Deak | c61eef7 | 2012-10-23 18:53:26 +0000 | [diff] [blame] | 45 | /* |
| 46 | * Default to use monotonic timestamps for wait-for-vblank and page-flip |
| 47 | * complete events. |
| 48 | */ |
| 49 | unsigned int drm_timestamp_monotonic = 1; |
| 50 | |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame] | 51 | MODULE_AUTHOR(CORE_AUTHOR); |
| 52 | MODULE_DESCRIPTION(CORE_DESC); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 53 | MODULE_LICENSE("GPL and additional rights"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 54 | MODULE_PARM_DESC(debug, "Enable debug output"); |
Mario Kleiner | 27641c3 | 2010-10-23 04:20:23 +0200 | [diff] [blame] | 55 | MODULE_PARM_DESC(vblankoffdelay, "Delay until vblank irq auto-disable [msecs]"); |
| 56 | MODULE_PARM_DESC(timestamp_precision_usec, "Max. error on timestamps [usecs]"); |
Imre Deak | c61eef7 | 2012-10-23 18:53:26 +0000 | [diff] [blame] | 57 | MODULE_PARM_DESC(timestamp_monotonic, "Use monotonic timestamps"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 58 | |
Dave Jones | c075814 | 2005-10-03 15:02:20 -0400 | [diff] [blame] | 59 | module_param_named(debug, drm_debug, int, 0600); |
Mario Kleiner | 27641c3 | 2010-10-23 04:20:23 +0200 | [diff] [blame] | 60 | module_param_named(vblankoffdelay, drm_vblank_offdelay, int, 0600); |
| 61 | module_param_named(timestamp_precision_usec, drm_timestamp_precision, int, 0600); |
Imre Deak | c61eef7 | 2012-10-23 18:53:26 +0000 | [diff] [blame] | 62 | module_param_named(timestamp_monotonic, drm_timestamp_monotonic, int, 0600); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 63 | |
David Herrmann | 0d63988 | 2014-02-24 15:53:25 +0100 | [diff] [blame] | 64 | static DEFINE_SPINLOCK(drm_minor_lock); |
David Herrmann | 1b7199f | 2014-07-23 12:29:56 +0200 | [diff] [blame^] | 65 | static struct idr drm_minors_idr; |
Dave Airlie | 2c14f28 | 2008-04-21 16:47:32 +1000 | [diff] [blame] | 66 | |
Greg Kroah-Hartman | 0650fd5 | 2006-01-20 14:08:59 -0800 | [diff] [blame] | 67 | struct class *drm_class; |
David Herrmann | 1b7199f | 2014-07-23 12:29:56 +0200 | [diff] [blame^] | 68 | static struct dentry *drm_debugfs_root; |
Joe Perches | 5ad3d88 | 2011-04-17 20:35:51 -0700 | [diff] [blame] | 69 | |
| 70 | int drm_err(const char *func, const char *format, ...) |
| 71 | { |
| 72 | struct va_format vaf; |
| 73 | va_list args; |
| 74 | int r; |
| 75 | |
| 76 | va_start(args, format); |
| 77 | |
| 78 | vaf.fmt = format; |
| 79 | vaf.va = &args; |
| 80 | |
| 81 | r = printk(KERN_ERR "[" DRM_NAME ":%s] *ERROR* %pV", func, &vaf); |
| 82 | |
| 83 | va_end(args); |
| 84 | |
| 85 | return r; |
| 86 | } |
| 87 | EXPORT_SYMBOL(drm_err); |
| 88 | |
Lespiau, Damien | 1287aa9 | 2014-03-24 15:53:17 +0000 | [diff] [blame] | 89 | void drm_ut_debug_printk(const char *function_name, const char *format, ...) |
yakui_zhao | 4fefcb2 | 2009-06-02 14:09:47 +0800 | [diff] [blame] | 90 | { |
Daniel Vetter | fffb906 | 2013-11-17 22:25:02 +0100 | [diff] [blame] | 91 | struct va_format vaf; |
yakui_zhao | 4fefcb2 | 2009-06-02 14:09:47 +0800 | [diff] [blame] | 92 | va_list args; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 93 | |
Lespiau, Damien | a73d4e9 | 2014-03-24 15:53:15 +0000 | [diff] [blame] | 94 | va_start(args, format); |
| 95 | vaf.fmt = format; |
| 96 | vaf.va = &args; |
Daniel Vetter | fffb906 | 2013-11-17 22:25:02 +0100 | [diff] [blame] | 97 | |
Lespiau, Damien | 0ed0298 | 2014-03-24 15:53:18 +0000 | [diff] [blame] | 98 | printk(KERN_DEBUG "[" DRM_NAME ":%s] %pV", function_name, &vaf); |
Lespiau, Damien | a73d4e9 | 2014-03-24 15:53:15 +0000 | [diff] [blame] | 99 | |
| 100 | va_end(args); |
yakui_zhao | 4fefcb2 | 2009-06-02 14:09:47 +0800 | [diff] [blame] | 101 | } |
| 102 | EXPORT_SYMBOL(drm_ut_debug_printk); |
Joe Perches | 5ad3d88 | 2011-04-17 20:35:51 -0700 | [diff] [blame] | 103 | |
Dave Airlie | 7c1c287 | 2008-11-28 14:22:24 +1000 | [diff] [blame] | 104 | struct drm_master *drm_master_create(struct drm_minor *minor) |
| 105 | { |
| 106 | struct drm_master *master; |
| 107 | |
Eric Anholt | 9a298b2 | 2009-03-24 12:23:04 -0700 | [diff] [blame] | 108 | master = kzalloc(sizeof(*master), GFP_KERNEL); |
Dave Airlie | 7c1c287 | 2008-11-28 14:22:24 +1000 | [diff] [blame] | 109 | if (!master) |
| 110 | return NULL; |
| 111 | |
| 112 | kref_init(&master->refcount); |
| 113 | spin_lock_init(&master->lock.spinlock); |
| 114 | init_waitqueue_head(&master->lock.lock_queue); |
Daniel Vetter | 10e6856 | 2014-04-05 11:12:04 +0200 | [diff] [blame] | 115 | if (drm_ht_create(&master->magiclist, DRM_MAGIC_HASH_ORDER)) { |
| 116 | kfree(master); |
| 117 | return NULL; |
| 118 | } |
Dave Airlie | 7c1c287 | 2008-11-28 14:22:24 +1000 | [diff] [blame] | 119 | INIT_LIST_HEAD(&master->magicfree); |
| 120 | master->minor = minor; |
| 121 | |
Dave Airlie | 7c1c287 | 2008-11-28 14:22:24 +1000 | [diff] [blame] | 122 | return master; |
| 123 | } |
| 124 | |
| 125 | struct drm_master *drm_master_get(struct drm_master *master) |
| 126 | { |
| 127 | kref_get(&master->refcount); |
| 128 | return master; |
| 129 | } |
Thomas Hellstrom | 85bb0c3 | 2009-12-06 21:46:28 +0100 | [diff] [blame] | 130 | EXPORT_SYMBOL(drm_master_get); |
Dave Airlie | 7c1c287 | 2008-11-28 14:22:24 +1000 | [diff] [blame] | 131 | |
| 132 | static void drm_master_destroy(struct kref *kref) |
| 133 | { |
| 134 | struct drm_master *master = container_of(kref, struct drm_master, refcount); |
| 135 | struct drm_magic_entry *pt, *next; |
| 136 | struct drm_device *dev = master->minor->dev; |
Dave Airlie | c1ff85d | 2009-01-19 17:17:58 +1000 | [diff] [blame] | 137 | struct drm_map_list *r_list, *list_temp; |
Dave Airlie | 7c1c287 | 2008-11-28 14:22:24 +1000 | [diff] [blame] | 138 | |
Thomas Hellstrom | c996fd0 | 2014-02-25 19:57:44 +0100 | [diff] [blame] | 139 | mutex_lock(&dev->struct_mutex); |
Dave Airlie | 7c1c287 | 2008-11-28 14:22:24 +1000 | [diff] [blame] | 140 | if (dev->driver->master_destroy) |
| 141 | dev->driver->master_destroy(dev, master); |
| 142 | |
Dave Airlie | c1ff85d | 2009-01-19 17:17:58 +1000 | [diff] [blame] | 143 | list_for_each_entry_safe(r_list, list_temp, &dev->maplist, head) { |
| 144 | if (r_list->master == master) { |
| 145 | drm_rmmap_locked(dev, r_list->map); |
| 146 | r_list = NULL; |
| 147 | } |
| 148 | } |
| 149 | |
Dave Airlie | 7c1c287 | 2008-11-28 14:22:24 +1000 | [diff] [blame] | 150 | if (master->unique) { |
Eric Anholt | 9a298b2 | 2009-03-24 12:23:04 -0700 | [diff] [blame] | 151 | kfree(master->unique); |
Dave Airlie | 7c1c287 | 2008-11-28 14:22:24 +1000 | [diff] [blame] | 152 | master->unique = NULL; |
| 153 | master->unique_len = 0; |
| 154 | } |
| 155 | |
| 156 | list_for_each_entry_safe(pt, next, &master->magicfree, head) { |
| 157 | list_del(&pt->head); |
| 158 | drm_ht_remove_item(&master->magiclist, &pt->hash_item); |
Eric Anholt | 9a298b2 | 2009-03-24 12:23:04 -0700 | [diff] [blame] | 159 | kfree(pt); |
Dave Airlie | 7c1c287 | 2008-11-28 14:22:24 +1000 | [diff] [blame] | 160 | } |
| 161 | |
| 162 | drm_ht_remove(&master->magiclist); |
| 163 | |
Thomas Hellstrom | c996fd0 | 2014-02-25 19:57:44 +0100 | [diff] [blame] | 164 | mutex_unlock(&dev->struct_mutex); |
Eric Anholt | 9a298b2 | 2009-03-24 12:23:04 -0700 | [diff] [blame] | 165 | kfree(master); |
Dave Airlie | 7c1c287 | 2008-11-28 14:22:24 +1000 | [diff] [blame] | 166 | } |
| 167 | |
| 168 | void drm_master_put(struct drm_master **master) |
| 169 | { |
| 170 | kref_put(&(*master)->refcount, drm_master_destroy); |
| 171 | *master = NULL; |
| 172 | } |
Thomas Hellstrom | 85bb0c3 | 2009-12-06 21:46:28 +0100 | [diff] [blame] | 173 | EXPORT_SYMBOL(drm_master_put); |
Dave Airlie | 7c1c287 | 2008-11-28 14:22:24 +1000 | [diff] [blame] | 174 | |
| 175 | int drm_setmaster_ioctl(struct drm_device *dev, void *data, |
| 176 | struct drm_file *file_priv) |
| 177 | { |
Benjamin Gaignard | 53ef160 | 2013-06-26 17:58:59 +0200 | [diff] [blame] | 178 | int ret = 0; |
Thomas Hellstrom | 862302f | 2009-12-02 18:15:25 +0000 | [diff] [blame] | 179 | |
Thomas Hellstrom | c996fd0 | 2014-02-25 19:57:44 +0100 | [diff] [blame] | 180 | mutex_lock(&dev->master_mutex); |
David Herrmann | 48ba813 | 2014-07-22 18:46:09 +0200 | [diff] [blame] | 181 | if (drm_is_master(file_priv)) |
Thomas Hellstrom | c996fd0 | 2014-02-25 19:57:44 +0100 | [diff] [blame] | 182 | goto out_unlock; |
Jonas Bonn | 6b00842 | 2009-04-16 09:00:02 +0200 | [diff] [blame] | 183 | |
Thomas Hellstrom | c996fd0 | 2014-02-25 19:57:44 +0100 | [diff] [blame] | 184 | if (file_priv->minor->master) { |
| 185 | ret = -EINVAL; |
| 186 | goto out_unlock; |
| 187 | } |
Dave Airlie | 7c1c287 | 2008-11-28 14:22:24 +1000 | [diff] [blame] | 188 | |
Thomas Hellstrom | c996fd0 | 2014-02-25 19:57:44 +0100 | [diff] [blame] | 189 | if (!file_priv->master) { |
| 190 | ret = -EINVAL; |
| 191 | goto out_unlock; |
| 192 | } |
Dave Airlie | 7c1c287 | 2008-11-28 14:22:24 +1000 | [diff] [blame] | 193 | |
David Herrmann | 08bec5b | 2012-11-15 13:04:37 +0000 | [diff] [blame] | 194 | file_priv->minor->master = drm_master_get(file_priv->master); |
David Herrmann | 08bec5b | 2012-11-15 13:04:37 +0000 | [diff] [blame] | 195 | if (dev->driver->master_set) { |
| 196 | ret = dev->driver->master_set(dev, file_priv, false); |
David Herrmann | 48ba813 | 2014-07-22 18:46:09 +0200 | [diff] [blame] | 197 | if (unlikely(ret != 0)) |
David Herrmann | 08bec5b | 2012-11-15 13:04:37 +0000 | [diff] [blame] | 198 | drm_master_put(&file_priv->minor->master); |
Dave Airlie | 7c1c287 | 2008-11-28 14:22:24 +1000 | [diff] [blame] | 199 | } |
| 200 | |
Thomas Hellstrom | c996fd0 | 2014-02-25 19:57:44 +0100 | [diff] [blame] | 201 | out_unlock: |
| 202 | mutex_unlock(&dev->master_mutex); |
Benjamin Gaignard | 53ef160 | 2013-06-26 17:58:59 +0200 | [diff] [blame] | 203 | return ret; |
Dave Airlie | 7c1c287 | 2008-11-28 14:22:24 +1000 | [diff] [blame] | 204 | } |
| 205 | |
| 206 | int drm_dropmaster_ioctl(struct drm_device *dev, void *data, |
| 207 | struct drm_file *file_priv) |
| 208 | { |
Thomas Hellstrom | c996fd0 | 2014-02-25 19:57:44 +0100 | [diff] [blame] | 209 | int ret = -EINVAL; |
| 210 | |
| 211 | mutex_lock(&dev->master_mutex); |
David Herrmann | 48ba813 | 2014-07-22 18:46:09 +0200 | [diff] [blame] | 212 | if (!drm_is_master(file_priv)) |
Thomas Hellstrom | c996fd0 | 2014-02-25 19:57:44 +0100 | [diff] [blame] | 213 | goto out_unlock; |
Jonas Bonn | 6b00842 | 2009-04-16 09:00:02 +0200 | [diff] [blame] | 214 | |
Dave Airlie | 07f1c7a | 2009-04-20 09:32:50 +1000 | [diff] [blame] | 215 | if (!file_priv->minor->master) |
Thomas Hellstrom | c996fd0 | 2014-02-25 19:57:44 +0100 | [diff] [blame] | 216 | goto out_unlock; |
Dave Airlie | 07f1c7a | 2009-04-20 09:32:50 +1000 | [diff] [blame] | 217 | |
Thomas Hellstrom | c996fd0 | 2014-02-25 19:57:44 +0100 | [diff] [blame] | 218 | ret = 0; |
Thomas Hellstrom | 862302f | 2009-12-02 18:15:25 +0000 | [diff] [blame] | 219 | if (dev->driver->master_drop) |
| 220 | dev->driver->master_drop(dev, file_priv, false); |
Dave Airlie | 7c1c287 | 2008-11-28 14:22:24 +1000 | [diff] [blame] | 221 | drm_master_put(&file_priv->minor->master); |
Thomas Hellstrom | c996fd0 | 2014-02-25 19:57:44 +0100 | [diff] [blame] | 222 | |
| 223 | out_unlock: |
| 224 | mutex_unlock(&dev->master_mutex); |
| 225 | return ret; |
Dave Airlie | 7c1c287 | 2008-11-28 14:22:24 +1000 | [diff] [blame] | 226 | } |
| 227 | |
David Herrmann | 0d63988 | 2014-02-24 15:53:25 +0100 | [diff] [blame] | 228 | /* |
| 229 | * DRM Minors |
| 230 | * A DRM device can provide several char-dev interfaces on the DRM-Major. Each |
| 231 | * of them is represented by a drm_minor object. Depending on the capabilities |
| 232 | * of the device-driver, different interfaces are registered. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 233 | * |
David Herrmann | 0d63988 | 2014-02-24 15:53:25 +0100 | [diff] [blame] | 234 | * Minors can be accessed via dev->$minor_name. This pointer is either |
| 235 | * NULL or a valid drm_minor pointer and stays valid as long as the device is |
| 236 | * valid. This means, DRM minors have the same life-time as the underlying |
| 237 | * device. However, this doesn't mean that the minor is active. Minors are |
| 238 | * registered and unregistered dynamically according to device-state. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 239 | */ |
David Herrmann | 0d63988 | 2014-02-24 15:53:25 +0100 | [diff] [blame] | 240 | |
David Herrmann | 05b701f | 2014-01-29 12:43:56 +0100 | [diff] [blame] | 241 | static struct drm_minor **drm_minor_get_slot(struct drm_device *dev, |
| 242 | unsigned int type) |
| 243 | { |
| 244 | switch (type) { |
| 245 | case DRM_MINOR_LEGACY: |
| 246 | return &dev->primary; |
| 247 | case DRM_MINOR_RENDER: |
| 248 | return &dev->render; |
| 249 | case DRM_MINOR_CONTROL: |
| 250 | return &dev->control; |
| 251 | default: |
| 252 | return NULL; |
| 253 | } |
| 254 | } |
| 255 | |
| 256 | static int drm_minor_alloc(struct drm_device *dev, unsigned int type) |
| 257 | { |
| 258 | struct drm_minor *minor; |
| 259 | |
| 260 | minor = kzalloc(sizeof(*minor), GFP_KERNEL); |
| 261 | if (!minor) |
| 262 | return -ENOMEM; |
| 263 | |
| 264 | minor->type = type; |
| 265 | minor->dev = dev; |
David Herrmann | 05b701f | 2014-01-29 12:43:56 +0100 | [diff] [blame] | 266 | |
| 267 | *drm_minor_get_slot(dev, type) = minor; |
| 268 | return 0; |
| 269 | } |
| 270 | |
David Herrmann | bd9dfa9 | 2014-01-29 12:55:48 +0100 | [diff] [blame] | 271 | static void drm_minor_free(struct drm_device *dev, unsigned int type) |
| 272 | { |
| 273 | struct drm_minor **slot; |
| 274 | |
| 275 | slot = drm_minor_get_slot(dev, type); |
| 276 | if (*slot) { |
Dave Airlie | ad22279 | 2014-05-02 13:22:19 +1000 | [diff] [blame] | 277 | drm_mode_group_destroy(&(*slot)->mode_group); |
David Herrmann | bd9dfa9 | 2014-01-29 12:55:48 +0100 | [diff] [blame] | 278 | kfree(*slot); |
| 279 | *slot = NULL; |
| 280 | } |
| 281 | } |
| 282 | |
David Herrmann | afcdbc8 | 2014-01-29 12:57:05 +0100 | [diff] [blame] | 283 | static int drm_minor_register(struct drm_device *dev, unsigned int type) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 284 | { |
Dave Airlie | 2c14f28 | 2008-04-21 16:47:32 +1000 | [diff] [blame] | 285 | struct drm_minor *new_minor; |
David Herrmann | 0d63988 | 2014-02-24 15:53:25 +0100 | [diff] [blame] | 286 | unsigned long flags; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 287 | int ret; |
Dave Airlie | 2c14f28 | 2008-04-21 16:47:32 +1000 | [diff] [blame] | 288 | int minor_id; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 289 | |
| 290 | DRM_DEBUG("\n"); |
| 291 | |
David Herrmann | 05b701f | 2014-01-29 12:43:56 +0100 | [diff] [blame] | 292 | new_minor = *drm_minor_get_slot(dev, type); |
| 293 | if (!new_minor) |
| 294 | return 0; |
| 295 | |
David Herrmann | 0d63988 | 2014-02-24 15:53:25 +0100 | [diff] [blame] | 296 | idr_preload(GFP_KERNEL); |
| 297 | spin_lock_irqsave(&drm_minor_lock, flags); |
David Herrmann | 7d86cf1 | 2014-02-24 15:35:09 +0100 | [diff] [blame] | 298 | minor_id = idr_alloc(&drm_minors_idr, |
| 299 | NULL, |
| 300 | 64 * type, |
| 301 | 64 * (type + 1), |
David Herrmann | 0d63988 | 2014-02-24 15:53:25 +0100 | [diff] [blame] | 302 | GFP_NOWAIT); |
| 303 | spin_unlock_irqrestore(&drm_minor_lock, flags); |
| 304 | idr_preload_end(); |
David Herrmann | 7d86cf1 | 2014-02-24 15:35:09 +0100 | [diff] [blame] | 305 | |
Dave Airlie | 2c14f28 | 2008-04-21 16:47:32 +1000 | [diff] [blame] | 306 | if (minor_id < 0) |
| 307 | return minor_id; |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame] | 308 | |
Dave Airlie | 2c14f28 | 2008-04-21 16:47:32 +1000 | [diff] [blame] | 309 | new_minor->index = minor_id; |
| 310 | |
Ben Gamari | 955b12d | 2009-02-17 20:08:49 -0500 | [diff] [blame] | 311 | ret = drm_debugfs_init(new_minor, minor_id, drm_debugfs_root); |
| 312 | if (ret) { |
GeunSik Lim | 156f5a7 | 2009-06-02 15:01:37 +0900 | [diff] [blame] | 313 | DRM_ERROR("DRM: Failed to initialize /sys/kernel/debug/dri.\n"); |
David Herrmann | 1abbc43 | 2014-02-24 15:32:00 +0100 | [diff] [blame] | 314 | goto err_id; |
Ben Gamari | 955b12d | 2009-02-17 20:08:49 -0500 | [diff] [blame] | 315 | } |
Dave Airlie | 2c14f28 | 2008-04-21 16:47:32 +1000 | [diff] [blame] | 316 | |
| 317 | ret = drm_sysfs_device_add(new_minor); |
| 318 | if (ret) { |
David Herrmann | 1abbc43 | 2014-02-24 15:32:00 +0100 | [diff] [blame] | 319 | DRM_ERROR("DRM: Error sysfs_device_add.\n"); |
Daniel Vetter | cb6458f | 2013-08-08 15:41:34 +0200 | [diff] [blame] | 320 | goto err_debugfs; |
Dave Airlie | 2c14f28 | 2008-04-21 16:47:32 +1000 | [diff] [blame] | 321 | } |
Dave Airlie | 2c14f28 | 2008-04-21 16:47:32 +1000 | [diff] [blame] | 322 | |
David Herrmann | 0d63988 | 2014-02-24 15:53:25 +0100 | [diff] [blame] | 323 | /* replace NULL with @minor so lookups will succeed from now on */ |
| 324 | spin_lock_irqsave(&drm_minor_lock, flags); |
| 325 | idr_replace(&drm_minors_idr, new_minor, new_minor->index); |
| 326 | spin_unlock_irqrestore(&drm_minor_lock, flags); |
Dave Airlie | 2c14f28 | 2008-04-21 16:47:32 +1000 | [diff] [blame] | 327 | |
| 328 | DRM_DEBUG("new minor assigned %d\n", minor_id); |
| 329 | return 0; |
| 330 | |
Daniel Vetter | cb6458f | 2013-08-08 15:41:34 +0200 | [diff] [blame] | 331 | err_debugfs: |
Daniel Vetter | cb6458f | 2013-08-08 15:41:34 +0200 | [diff] [blame] | 332 | drm_debugfs_cleanup(new_minor); |
David Herrmann | 1abbc43 | 2014-02-24 15:32:00 +0100 | [diff] [blame] | 333 | err_id: |
David Herrmann | 0d63988 | 2014-02-24 15:53:25 +0100 | [diff] [blame] | 334 | spin_lock_irqsave(&drm_minor_lock, flags); |
Dave Airlie | 2c14f28 | 2008-04-21 16:47:32 +1000 | [diff] [blame] | 335 | idr_remove(&drm_minors_idr, minor_id); |
David Herrmann | 0d63988 | 2014-02-24 15:53:25 +0100 | [diff] [blame] | 336 | spin_unlock_irqrestore(&drm_minor_lock, flags); |
| 337 | new_minor->index = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 338 | return ret; |
| 339 | } |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame] | 340 | |
David Herrmann | afcdbc8 | 2014-01-29 12:57:05 +0100 | [diff] [blame] | 341 | static void drm_minor_unregister(struct drm_device *dev, unsigned int type) |
David Herrmann | f73aca5 | 2013-10-20 18:55:40 +0200 | [diff] [blame] | 342 | { |
David Herrmann | afcdbc8 | 2014-01-29 12:57:05 +0100 | [diff] [blame] | 343 | struct drm_minor *minor; |
David Herrmann | 0d63988 | 2014-02-24 15:53:25 +0100 | [diff] [blame] | 344 | unsigned long flags; |
David Herrmann | afcdbc8 | 2014-01-29 12:57:05 +0100 | [diff] [blame] | 345 | |
| 346 | minor = *drm_minor_get_slot(dev, type); |
David Herrmann | a348335 | 2013-11-13 11:42:26 +0100 | [diff] [blame] | 347 | if (!minor || !minor->kdev) |
David Herrmann | f73aca5 | 2013-10-20 18:55:40 +0200 | [diff] [blame] | 348 | return; |
| 349 | |
David Herrmann | 0d63988 | 2014-02-24 15:53:25 +0100 | [diff] [blame] | 350 | spin_lock_irqsave(&drm_minor_lock, flags); |
David Herrmann | f67e946 | 2013-10-20 18:55:44 +0200 | [diff] [blame] | 351 | idr_remove(&drm_minors_idr, minor->index); |
David Herrmann | 0d63988 | 2014-02-24 15:53:25 +0100 | [diff] [blame] | 352 | spin_unlock_irqrestore(&drm_minor_lock, flags); |
| 353 | minor->index = 0; |
| 354 | |
David Herrmann | 865fb47 | 2013-10-20 18:55:43 +0200 | [diff] [blame] | 355 | drm_debugfs_cleanup(minor); |
David Herrmann | 865fb47 | 2013-10-20 18:55:43 +0200 | [diff] [blame] | 356 | drm_sysfs_device_remove(minor); |
David Herrmann | f73aca5 | 2013-10-20 18:55:40 +0200 | [diff] [blame] | 357 | } |
| 358 | |
| 359 | /** |
David Herrmann | 1616c52 | 2014-01-29 10:49:19 +0100 | [diff] [blame] | 360 | * drm_minor_acquire - Acquire a DRM minor |
| 361 | * @minor_id: Minor ID of the DRM-minor |
David Herrmann | f73aca5 | 2013-10-20 18:55:40 +0200 | [diff] [blame] | 362 | * |
David Herrmann | 1616c52 | 2014-01-29 10:49:19 +0100 | [diff] [blame] | 363 | * Looks up the given minor-ID and returns the respective DRM-minor object. The |
| 364 | * refence-count of the underlying device is increased so you must release this |
| 365 | * object with drm_minor_release(). |
| 366 | * |
| 367 | * As long as you hold this minor, it is guaranteed that the object and the |
| 368 | * minor->dev pointer will stay valid! However, the device may get unplugged and |
| 369 | * unregistered while you hold the minor. |
| 370 | * |
| 371 | * Returns: |
| 372 | * Pointer to minor-object with increased device-refcount, or PTR_ERR on |
| 373 | * failure. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 374 | */ |
David Herrmann | 1616c52 | 2014-01-29 10:49:19 +0100 | [diff] [blame] | 375 | struct drm_minor *drm_minor_acquire(unsigned int minor_id) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 376 | { |
David Herrmann | 1616c52 | 2014-01-29 10:49:19 +0100 | [diff] [blame] | 377 | struct drm_minor *minor; |
David Herrmann | 0d63988 | 2014-02-24 15:53:25 +0100 | [diff] [blame] | 378 | unsigned long flags; |
Eric Anholt | 673a394 | 2008-07-30 12:06:12 -0700 | [diff] [blame] | 379 | |
David Herrmann | 0d63988 | 2014-02-24 15:53:25 +0100 | [diff] [blame] | 380 | spin_lock_irqsave(&drm_minor_lock, flags); |
David Herrmann | 1616c52 | 2014-01-29 10:49:19 +0100 | [diff] [blame] | 381 | minor = idr_find(&drm_minors_idr, minor_id); |
David Herrmann | 0d63988 | 2014-02-24 15:53:25 +0100 | [diff] [blame] | 382 | if (minor) |
| 383 | drm_dev_ref(minor->dev); |
| 384 | spin_unlock_irqrestore(&drm_minor_lock, flags); |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame] | 385 | |
David Herrmann | 0d63988 | 2014-02-24 15:53:25 +0100 | [diff] [blame] | 386 | if (!minor) { |
| 387 | return ERR_PTR(-ENODEV); |
| 388 | } else if (drm_device_is_unplugged(minor->dev)) { |
| 389 | drm_dev_unref(minor->dev); |
| 390 | return ERR_PTR(-ENODEV); |
| 391 | } |
| 392 | |
David Herrmann | 1616c52 | 2014-01-29 10:49:19 +0100 | [diff] [blame] | 393 | return minor; |
| 394 | } |
| 395 | |
| 396 | /** |
| 397 | * drm_minor_release - Release DRM minor |
| 398 | * @minor: Pointer to DRM minor object |
| 399 | * |
| 400 | * Release a minor that was previously acquired via drm_minor_acquire(). |
| 401 | */ |
| 402 | void drm_minor_release(struct drm_minor *minor) |
| 403 | { |
| 404 | drm_dev_unref(minor->dev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 405 | } |
Kristian Høgsberg | 112b715 | 2009-01-04 16:55:33 -0500 | [diff] [blame] | 406 | |
| 407 | /** |
Thierry Reding | c6a1af8a | 2014-05-19 13:39:07 +0200 | [diff] [blame] | 408 | * drm_put_dev - Unregister and release a DRM device |
| 409 | * @dev: DRM device |
| 410 | * |
| 411 | * Called at module unload time or when a PCI device is unplugged. |
| 412 | * |
| 413 | * Use of this function is discouraged. It will eventually go away completely. |
| 414 | * Please use drm_dev_unregister() and drm_dev_unref() explicitly instead. |
Kristian Høgsberg | 112b715 | 2009-01-04 16:55:33 -0500 | [diff] [blame] | 415 | * |
| 416 | * Cleans up all DRM device, calling drm_lastclose(). |
Kristian Høgsberg | 112b715 | 2009-01-04 16:55:33 -0500 | [diff] [blame] | 417 | */ |
| 418 | void drm_put_dev(struct drm_device *dev) |
| 419 | { |
Kristian Høgsberg | 112b715 | 2009-01-04 16:55:33 -0500 | [diff] [blame] | 420 | DRM_DEBUG("\n"); |
| 421 | |
| 422 | if (!dev) { |
| 423 | DRM_ERROR("cleanup called no dev\n"); |
| 424 | return; |
| 425 | } |
| 426 | |
David Herrmann | c3a4973 | 2013-10-02 11:23:38 +0200 | [diff] [blame] | 427 | drm_dev_unregister(dev); |
David Herrmann | 099d1c2 | 2014-01-29 10:21:36 +0100 | [diff] [blame] | 428 | drm_dev_unref(dev); |
Kristian Høgsberg | 112b715 | 2009-01-04 16:55:33 -0500 | [diff] [blame] | 429 | } |
| 430 | EXPORT_SYMBOL(drm_put_dev); |
Dave Airlie | 2c07a21 | 2012-02-20 14:18:07 +0000 | [diff] [blame] | 431 | |
| 432 | void drm_unplug_dev(struct drm_device *dev) |
| 433 | { |
| 434 | /* for a USB device */ |
David Herrmann | afcdbc8 | 2014-01-29 12:57:05 +0100 | [diff] [blame] | 435 | drm_minor_unregister(dev, DRM_MINOR_LEGACY); |
| 436 | drm_minor_unregister(dev, DRM_MINOR_RENDER); |
| 437 | drm_minor_unregister(dev, DRM_MINOR_CONTROL); |
Dave Airlie | 2c07a21 | 2012-02-20 14:18:07 +0000 | [diff] [blame] | 438 | |
| 439 | mutex_lock(&drm_global_mutex); |
| 440 | |
| 441 | drm_device_set_unplugged(dev); |
| 442 | |
| 443 | if (dev->open_count == 0) { |
| 444 | drm_put_dev(dev); |
| 445 | } |
| 446 | mutex_unlock(&drm_global_mutex); |
| 447 | } |
| 448 | EXPORT_SYMBOL(drm_unplug_dev); |
David Herrmann | 1bb7253 | 2013-10-02 11:23:34 +0200 | [diff] [blame] | 449 | |
David Herrmann | 31bbe16 | 2014-01-03 14:09:47 +0100 | [diff] [blame] | 450 | /* |
| 451 | * DRM internal mount |
| 452 | * We want to be able to allocate our own "struct address_space" to control |
| 453 | * memory-mappings in VRAM (or stolen RAM, ...). However, core MM does not allow |
| 454 | * stand-alone address_space objects, so we need an underlying inode. As there |
| 455 | * is no way to allocate an independent inode easily, we need a fake internal |
| 456 | * VFS mount-point. |
| 457 | * |
| 458 | * The drm_fs_inode_new() function allocates a new inode, drm_fs_inode_free() |
| 459 | * frees it again. You are allowed to use iget() and iput() to get references to |
| 460 | * the inode. But each drm_fs_inode_new() call must be paired with exactly one |
| 461 | * drm_fs_inode_free() call (which does not have to be the last iput()). |
| 462 | * We use drm_fs_inode_*() to manage our internal VFS mount-point and share it |
| 463 | * between multiple inode-users. You could, technically, call |
| 464 | * iget() + drm_fs_inode_free() directly after alloc and sometime later do an |
| 465 | * iput(), but this way you'd end up with a new vfsmount for each inode. |
| 466 | */ |
| 467 | |
| 468 | static int drm_fs_cnt; |
| 469 | static struct vfsmount *drm_fs_mnt; |
| 470 | |
| 471 | static const struct dentry_operations drm_fs_dops = { |
| 472 | .d_dname = simple_dname, |
| 473 | }; |
| 474 | |
| 475 | static const struct super_operations drm_fs_sops = { |
| 476 | .statfs = simple_statfs, |
| 477 | }; |
| 478 | |
| 479 | static struct dentry *drm_fs_mount(struct file_system_type *fs_type, int flags, |
| 480 | const char *dev_name, void *data) |
| 481 | { |
| 482 | return mount_pseudo(fs_type, |
| 483 | "drm:", |
| 484 | &drm_fs_sops, |
| 485 | &drm_fs_dops, |
| 486 | 0x010203ff); |
| 487 | } |
| 488 | |
| 489 | static struct file_system_type drm_fs_type = { |
| 490 | .name = "drm", |
| 491 | .owner = THIS_MODULE, |
| 492 | .mount = drm_fs_mount, |
| 493 | .kill_sb = kill_anon_super, |
| 494 | }; |
| 495 | |
| 496 | static struct inode *drm_fs_inode_new(void) |
| 497 | { |
| 498 | struct inode *inode; |
| 499 | int r; |
| 500 | |
| 501 | r = simple_pin_fs(&drm_fs_type, &drm_fs_mnt, &drm_fs_cnt); |
| 502 | if (r < 0) { |
| 503 | DRM_ERROR("Cannot mount pseudo fs: %d\n", r); |
| 504 | return ERR_PTR(r); |
| 505 | } |
| 506 | |
| 507 | inode = alloc_anon_inode(drm_fs_mnt->mnt_sb); |
| 508 | if (IS_ERR(inode)) |
| 509 | simple_release_fs(&drm_fs_mnt, &drm_fs_cnt); |
| 510 | |
| 511 | return inode; |
| 512 | } |
| 513 | |
| 514 | static void drm_fs_inode_free(struct inode *inode) |
| 515 | { |
| 516 | if (inode) { |
| 517 | iput(inode); |
| 518 | simple_release_fs(&drm_fs_mnt, &drm_fs_cnt); |
| 519 | } |
| 520 | } |
| 521 | |
David Herrmann | 1bb7253 | 2013-10-02 11:23:34 +0200 | [diff] [blame] | 522 | /** |
Thierry Reding | c6a1af8a | 2014-05-19 13:39:07 +0200 | [diff] [blame] | 523 | * drm_dev_alloc - Allocate new DRM device |
David Herrmann | 1bb7253 | 2013-10-02 11:23:34 +0200 | [diff] [blame] | 524 | * @driver: DRM driver to allocate device for |
| 525 | * @parent: Parent device object |
| 526 | * |
| 527 | * Allocate and initialize a new DRM device. No device registration is done. |
David Herrmann | c22f0ac | 2013-10-02 11:23:35 +0200 | [diff] [blame] | 528 | * Call drm_dev_register() to advertice the device to user space and register it |
| 529 | * with other core subsystems. |
David Herrmann | 1bb7253 | 2013-10-02 11:23:34 +0200 | [diff] [blame] | 530 | * |
David Herrmann | 099d1c2 | 2014-01-29 10:21:36 +0100 | [diff] [blame] | 531 | * The initial ref-count of the object is 1. Use drm_dev_ref() and |
| 532 | * drm_dev_unref() to take and drop further ref-counts. |
| 533 | * |
David Herrmann | 1bb7253 | 2013-10-02 11:23:34 +0200 | [diff] [blame] | 534 | * RETURNS: |
| 535 | * Pointer to new DRM device, or NULL if out of memory. |
| 536 | */ |
| 537 | struct drm_device *drm_dev_alloc(struct drm_driver *driver, |
| 538 | struct device *parent) |
| 539 | { |
| 540 | struct drm_device *dev; |
| 541 | int ret; |
| 542 | |
| 543 | dev = kzalloc(sizeof(*dev), GFP_KERNEL); |
| 544 | if (!dev) |
| 545 | return NULL; |
| 546 | |
David Herrmann | 099d1c2 | 2014-01-29 10:21:36 +0100 | [diff] [blame] | 547 | kref_init(&dev->ref); |
David Herrmann | 1bb7253 | 2013-10-02 11:23:34 +0200 | [diff] [blame] | 548 | dev->dev = parent; |
| 549 | dev->driver = driver; |
| 550 | |
| 551 | INIT_LIST_HEAD(&dev->filelist); |
| 552 | INIT_LIST_HEAD(&dev->ctxlist); |
| 553 | INIT_LIST_HEAD(&dev->vmalist); |
| 554 | INIT_LIST_HEAD(&dev->maplist); |
| 555 | INIT_LIST_HEAD(&dev->vblank_event_list); |
| 556 | |
Daniel Vetter | 2177a21 | 2013-12-16 11:21:06 +0100 | [diff] [blame] | 557 | spin_lock_init(&dev->buf_lock); |
David Herrmann | 1bb7253 | 2013-10-02 11:23:34 +0200 | [diff] [blame] | 558 | spin_lock_init(&dev->event_lock); |
| 559 | mutex_init(&dev->struct_mutex); |
| 560 | mutex_init(&dev->ctxlist_mutex); |
Thomas Hellstrom | c996fd0 | 2014-02-25 19:57:44 +0100 | [diff] [blame] | 561 | mutex_init(&dev->master_mutex); |
David Herrmann | 1bb7253 | 2013-10-02 11:23:34 +0200 | [diff] [blame] | 562 | |
David Herrmann | 6796cb1 | 2014-01-03 14:24:19 +0100 | [diff] [blame] | 563 | dev->anon_inode = drm_fs_inode_new(); |
| 564 | if (IS_ERR(dev->anon_inode)) { |
| 565 | ret = PTR_ERR(dev->anon_inode); |
| 566 | DRM_ERROR("Cannot allocate anonymous inode: %d\n", ret); |
David Herrmann | 1bb7253 | 2013-10-02 11:23:34 +0200 | [diff] [blame] | 567 | goto err_free; |
David Herrmann | 6796cb1 | 2014-01-03 14:24:19 +0100 | [diff] [blame] | 568 | } |
| 569 | |
David Herrmann | 05b701f | 2014-01-29 12:43:56 +0100 | [diff] [blame] | 570 | if (drm_core_check_feature(dev, DRIVER_MODESET)) { |
| 571 | ret = drm_minor_alloc(dev, DRM_MINOR_CONTROL); |
| 572 | if (ret) |
| 573 | goto err_minors; |
| 574 | } |
| 575 | |
David Herrmann | 6d6dfcf | 2014-03-16 14:38:40 +0100 | [diff] [blame] | 576 | if (drm_core_check_feature(dev, DRIVER_RENDER)) { |
David Herrmann | 05b701f | 2014-01-29 12:43:56 +0100 | [diff] [blame] | 577 | ret = drm_minor_alloc(dev, DRM_MINOR_RENDER); |
| 578 | if (ret) |
| 579 | goto err_minors; |
| 580 | } |
| 581 | |
| 582 | ret = drm_minor_alloc(dev, DRM_MINOR_LEGACY); |
| 583 | if (ret) |
| 584 | goto err_minors; |
| 585 | |
David Herrmann | 6796cb1 | 2014-01-03 14:24:19 +0100 | [diff] [blame] | 586 | if (drm_ht_create(&dev->map_hash, 12)) |
David Herrmann | 05b701f | 2014-01-29 12:43:56 +0100 | [diff] [blame] | 587 | goto err_minors; |
David Herrmann | 1bb7253 | 2013-10-02 11:23:34 +0200 | [diff] [blame] | 588 | |
| 589 | ret = drm_ctxbitmap_init(dev); |
| 590 | if (ret) { |
| 591 | DRM_ERROR("Cannot allocate memory for context bitmap.\n"); |
| 592 | goto err_ht; |
| 593 | } |
| 594 | |
| 595 | if (driver->driver_features & DRIVER_GEM) { |
| 596 | ret = drm_gem_init(dev); |
| 597 | if (ret) { |
| 598 | DRM_ERROR("Cannot initialize graphics execution manager (GEM)\n"); |
| 599 | goto err_ctxbitmap; |
| 600 | } |
| 601 | } |
| 602 | |
| 603 | return dev; |
| 604 | |
| 605 | err_ctxbitmap: |
| 606 | drm_ctxbitmap_cleanup(dev); |
| 607 | err_ht: |
| 608 | drm_ht_remove(&dev->map_hash); |
David Herrmann | 05b701f | 2014-01-29 12:43:56 +0100 | [diff] [blame] | 609 | err_minors: |
David Herrmann | bd9dfa9 | 2014-01-29 12:55:48 +0100 | [diff] [blame] | 610 | drm_minor_free(dev, DRM_MINOR_LEGACY); |
| 611 | drm_minor_free(dev, DRM_MINOR_RENDER); |
| 612 | drm_minor_free(dev, DRM_MINOR_CONTROL); |
David Herrmann | 6796cb1 | 2014-01-03 14:24:19 +0100 | [diff] [blame] | 613 | drm_fs_inode_free(dev->anon_inode); |
David Herrmann | 1bb7253 | 2013-10-02 11:23:34 +0200 | [diff] [blame] | 614 | err_free: |
Thomas Hellstrom | c996fd0 | 2014-02-25 19:57:44 +0100 | [diff] [blame] | 615 | mutex_destroy(&dev->master_mutex); |
David Herrmann | 1bb7253 | 2013-10-02 11:23:34 +0200 | [diff] [blame] | 616 | kfree(dev); |
| 617 | return NULL; |
| 618 | } |
| 619 | EXPORT_SYMBOL(drm_dev_alloc); |
David Herrmann | c22f0ac | 2013-10-02 11:23:35 +0200 | [diff] [blame] | 620 | |
David Herrmann | 099d1c2 | 2014-01-29 10:21:36 +0100 | [diff] [blame] | 621 | static void drm_dev_release(struct kref *ref) |
David Herrmann | 0dc8fe5 | 2013-10-02 11:23:37 +0200 | [diff] [blame] | 622 | { |
David Herrmann | 099d1c2 | 2014-01-29 10:21:36 +0100 | [diff] [blame] | 623 | struct drm_device *dev = container_of(ref, struct drm_device, ref); |
David Herrmann | 8f6599d | 2013-10-20 18:55:45 +0200 | [diff] [blame] | 624 | |
David Herrmann | 0dc8fe5 | 2013-10-02 11:23:37 +0200 | [diff] [blame] | 625 | if (dev->driver->driver_features & DRIVER_GEM) |
| 626 | drm_gem_destroy(dev); |
| 627 | |
| 628 | drm_ctxbitmap_cleanup(dev); |
| 629 | drm_ht_remove(&dev->map_hash); |
David Herrmann | 6796cb1 | 2014-01-03 14:24:19 +0100 | [diff] [blame] | 630 | drm_fs_inode_free(dev->anon_inode); |
David Herrmann | 0dc8fe5 | 2013-10-02 11:23:37 +0200 | [diff] [blame] | 631 | |
David Herrmann | bd9dfa9 | 2014-01-29 12:55:48 +0100 | [diff] [blame] | 632 | drm_minor_free(dev, DRM_MINOR_LEGACY); |
| 633 | drm_minor_free(dev, DRM_MINOR_RENDER); |
| 634 | drm_minor_free(dev, DRM_MINOR_CONTROL); |
| 635 | |
Thomas Hellstrom | c996fd0 | 2014-02-25 19:57:44 +0100 | [diff] [blame] | 636 | mutex_destroy(&dev->master_mutex); |
Thierry Reding | ca8e2ad | 2014-04-11 15:23:00 +0200 | [diff] [blame] | 637 | kfree(dev->unique); |
David Herrmann | 0dc8fe5 | 2013-10-02 11:23:37 +0200 | [diff] [blame] | 638 | kfree(dev); |
| 639 | } |
David Herrmann | 099d1c2 | 2014-01-29 10:21:36 +0100 | [diff] [blame] | 640 | |
| 641 | /** |
| 642 | * drm_dev_ref - Take reference of a DRM device |
| 643 | * @dev: device to take reference of or NULL |
| 644 | * |
| 645 | * This increases the ref-count of @dev by one. You *must* already own a |
| 646 | * reference when calling this. Use drm_dev_unref() to drop this reference |
| 647 | * again. |
| 648 | * |
| 649 | * This function never fails. However, this function does not provide *any* |
| 650 | * guarantee whether the device is alive or running. It only provides a |
| 651 | * reference to the object and the memory associated with it. |
| 652 | */ |
| 653 | void drm_dev_ref(struct drm_device *dev) |
| 654 | { |
| 655 | if (dev) |
| 656 | kref_get(&dev->ref); |
| 657 | } |
| 658 | EXPORT_SYMBOL(drm_dev_ref); |
| 659 | |
| 660 | /** |
| 661 | * drm_dev_unref - Drop reference of a DRM device |
| 662 | * @dev: device to drop reference of or NULL |
| 663 | * |
| 664 | * This decreases the ref-count of @dev by one. The device is destroyed if the |
| 665 | * ref-count drops to zero. |
| 666 | */ |
| 667 | void drm_dev_unref(struct drm_device *dev) |
| 668 | { |
| 669 | if (dev) |
| 670 | kref_put(&dev->ref, drm_dev_release); |
| 671 | } |
| 672 | EXPORT_SYMBOL(drm_dev_unref); |
David Herrmann | 0dc8fe5 | 2013-10-02 11:23:37 +0200 | [diff] [blame] | 673 | |
| 674 | /** |
David Herrmann | c22f0ac | 2013-10-02 11:23:35 +0200 | [diff] [blame] | 675 | * drm_dev_register - Register DRM device |
| 676 | * @dev: Device to register |
Thierry Reding | c6a1af8a | 2014-05-19 13:39:07 +0200 | [diff] [blame] | 677 | * @flags: Flags passed to the driver's .load() function |
David Herrmann | c22f0ac | 2013-10-02 11:23:35 +0200 | [diff] [blame] | 678 | * |
| 679 | * Register the DRM device @dev with the system, advertise device to user-space |
| 680 | * and start normal device operation. @dev must be allocated via drm_dev_alloc() |
| 681 | * previously. |
| 682 | * |
| 683 | * Never call this twice on any device! |
| 684 | * |
| 685 | * RETURNS: |
| 686 | * 0 on success, negative error code on failure. |
| 687 | */ |
| 688 | int drm_dev_register(struct drm_device *dev, unsigned long flags) |
| 689 | { |
| 690 | int ret; |
| 691 | |
| 692 | mutex_lock(&drm_global_mutex); |
| 693 | |
David Herrmann | afcdbc8 | 2014-01-29 12:57:05 +0100 | [diff] [blame] | 694 | ret = drm_minor_register(dev, DRM_MINOR_CONTROL); |
David Herrmann | c22f0ac | 2013-10-02 11:23:35 +0200 | [diff] [blame] | 695 | if (ret) |
David Herrmann | 05b701f | 2014-01-29 12:43:56 +0100 | [diff] [blame] | 696 | goto err_minors; |
| 697 | |
David Herrmann | afcdbc8 | 2014-01-29 12:57:05 +0100 | [diff] [blame] | 698 | ret = drm_minor_register(dev, DRM_MINOR_RENDER); |
David Herrmann | 05b701f | 2014-01-29 12:43:56 +0100 | [diff] [blame] | 699 | if (ret) |
| 700 | goto err_minors; |
| 701 | |
David Herrmann | afcdbc8 | 2014-01-29 12:57:05 +0100 | [diff] [blame] | 702 | ret = drm_minor_register(dev, DRM_MINOR_LEGACY); |
David Herrmann | 05b701f | 2014-01-29 12:43:56 +0100 | [diff] [blame] | 703 | if (ret) |
| 704 | goto err_minors; |
David Herrmann | c22f0ac | 2013-10-02 11:23:35 +0200 | [diff] [blame] | 705 | |
| 706 | if (dev->driver->load) { |
| 707 | ret = dev->driver->load(dev, flags); |
| 708 | if (ret) |
David Herrmann | 05b701f | 2014-01-29 12:43:56 +0100 | [diff] [blame] | 709 | goto err_minors; |
David Herrmann | c22f0ac | 2013-10-02 11:23:35 +0200 | [diff] [blame] | 710 | } |
| 711 | |
| 712 | /* setup grouping for legacy outputs */ |
| 713 | if (drm_core_check_feature(dev, DRIVER_MODESET)) { |
| 714 | ret = drm_mode_group_init_legacy_group(dev, |
| 715 | &dev->primary->mode_group); |
| 716 | if (ret) |
| 717 | goto err_unload; |
| 718 | } |
| 719 | |
David Herrmann | c22f0ac | 2013-10-02 11:23:35 +0200 | [diff] [blame] | 720 | ret = 0; |
| 721 | goto out_unlock; |
| 722 | |
| 723 | err_unload: |
| 724 | if (dev->driver->unload) |
| 725 | dev->driver->unload(dev); |
David Herrmann | 05b701f | 2014-01-29 12:43:56 +0100 | [diff] [blame] | 726 | err_minors: |
David Herrmann | afcdbc8 | 2014-01-29 12:57:05 +0100 | [diff] [blame] | 727 | drm_minor_unregister(dev, DRM_MINOR_LEGACY); |
| 728 | drm_minor_unregister(dev, DRM_MINOR_RENDER); |
| 729 | drm_minor_unregister(dev, DRM_MINOR_CONTROL); |
David Herrmann | c22f0ac | 2013-10-02 11:23:35 +0200 | [diff] [blame] | 730 | out_unlock: |
| 731 | mutex_unlock(&drm_global_mutex); |
| 732 | return ret; |
| 733 | } |
| 734 | EXPORT_SYMBOL(drm_dev_register); |
David Herrmann | c3a4973 | 2013-10-02 11:23:38 +0200 | [diff] [blame] | 735 | |
| 736 | /** |
| 737 | * drm_dev_unregister - Unregister DRM device |
| 738 | * @dev: Device to unregister |
| 739 | * |
| 740 | * Unregister the DRM device from the system. This does the reverse of |
| 741 | * 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] | 742 | * drm_dev_unref() to drop their final reference. |
David Herrmann | c3a4973 | 2013-10-02 11:23:38 +0200 | [diff] [blame] | 743 | */ |
| 744 | void drm_dev_unregister(struct drm_device *dev) |
| 745 | { |
| 746 | struct drm_map_list *r_list, *list_temp; |
| 747 | |
| 748 | drm_lastclose(dev); |
| 749 | |
| 750 | if (dev->driver->unload) |
| 751 | dev->driver->unload(dev); |
| 752 | |
Daniel Vetter | 4efafeb | 2013-12-11 11:34:38 +0100 | [diff] [blame] | 753 | if (dev->agp) |
| 754 | drm_pci_agp_destroy(dev); |
David Herrmann | c3a4973 | 2013-10-02 11:23:38 +0200 | [diff] [blame] | 755 | |
| 756 | drm_vblank_cleanup(dev); |
| 757 | |
| 758 | list_for_each_entry_safe(r_list, list_temp, &dev->maplist, head) |
| 759 | drm_rmmap(dev, r_list->map); |
| 760 | |
David Herrmann | afcdbc8 | 2014-01-29 12:57:05 +0100 | [diff] [blame] | 761 | drm_minor_unregister(dev, DRM_MINOR_LEGACY); |
| 762 | drm_minor_unregister(dev, DRM_MINOR_RENDER); |
| 763 | drm_minor_unregister(dev, DRM_MINOR_CONTROL); |
David Herrmann | c3a4973 | 2013-10-02 11:23:38 +0200 | [diff] [blame] | 764 | } |
| 765 | EXPORT_SYMBOL(drm_dev_unregister); |
Thierry Reding | ca8e2ad | 2014-04-11 15:23:00 +0200 | [diff] [blame] | 766 | |
| 767 | /** |
| 768 | * drm_dev_set_unique - Set the unique name of a DRM device |
| 769 | * @dev: device of which to set the unique name |
| 770 | * @fmt: format string for unique name |
| 771 | * |
| 772 | * Sets the unique name of a DRM device using the specified format string and |
| 773 | * a variable list of arguments. Drivers can use this at driver probe time if |
| 774 | * the unique name of the devices they drive is static. |
| 775 | * |
| 776 | * Return: 0 on success or a negative error code on failure. |
| 777 | */ |
| 778 | int drm_dev_set_unique(struct drm_device *dev, const char *fmt, ...) |
| 779 | { |
| 780 | va_list ap; |
| 781 | |
| 782 | kfree(dev->unique); |
| 783 | |
| 784 | va_start(ap, fmt); |
| 785 | dev->unique = kvasprintf(GFP_KERNEL, fmt, ap); |
| 786 | va_end(ap); |
| 787 | |
| 788 | return dev->unique ? 0 : -ENOMEM; |
| 789 | } |
| 790 | EXPORT_SYMBOL(drm_dev_set_unique); |
David Herrmann | 1b7199f | 2014-07-23 12:29:56 +0200 | [diff] [blame^] | 791 | |
| 792 | /* |
| 793 | * DRM Core |
| 794 | * The DRM core module initializes all global DRM objects and makes them |
| 795 | * available to drivers. Once setup, drivers can probe their respective |
| 796 | * devices. |
| 797 | * Currently, core management includes: |
| 798 | * - The "DRM-Global" key/value database |
| 799 | * - Global ID management for connectors |
| 800 | * - DRM major number allocation |
| 801 | * - DRM minor management |
| 802 | * - DRM sysfs class |
| 803 | * - DRM debugfs root |
| 804 | * |
| 805 | * Furthermore, the DRM core provides dynamic char-dev lookups. For each |
| 806 | * interface registered on a DRM device, you can request minor numbers from DRM |
| 807 | * core. DRM core takes care of major-number management and char-dev |
| 808 | * registration. A stub ->open() callback forwards any open() requests to the |
| 809 | * registered minor. |
| 810 | */ |
| 811 | |
| 812 | static int drm_stub_open(struct inode *inode, struct file *filp) |
| 813 | { |
| 814 | const struct file_operations *new_fops; |
| 815 | struct drm_minor *minor; |
| 816 | int err; |
| 817 | |
| 818 | DRM_DEBUG("\n"); |
| 819 | |
| 820 | mutex_lock(&drm_global_mutex); |
| 821 | minor = drm_minor_acquire(iminor(inode)); |
| 822 | if (IS_ERR(minor)) { |
| 823 | err = PTR_ERR(minor); |
| 824 | goto out_unlock; |
| 825 | } |
| 826 | |
| 827 | new_fops = fops_get(minor->dev->driver->fops); |
| 828 | if (!new_fops) { |
| 829 | err = -ENODEV; |
| 830 | goto out_release; |
| 831 | } |
| 832 | |
| 833 | replace_fops(filp, new_fops); |
| 834 | if (filp->f_op->open) |
| 835 | err = filp->f_op->open(inode, filp); |
| 836 | else |
| 837 | err = 0; |
| 838 | |
| 839 | out_release: |
| 840 | drm_minor_release(minor); |
| 841 | out_unlock: |
| 842 | mutex_unlock(&drm_global_mutex); |
| 843 | return err; |
| 844 | } |
| 845 | |
| 846 | static const struct file_operations drm_stub_fops = { |
| 847 | .owner = THIS_MODULE, |
| 848 | .open = drm_stub_open, |
| 849 | .llseek = noop_llseek, |
| 850 | }; |
| 851 | |
| 852 | static int __init drm_core_init(void) |
| 853 | { |
| 854 | int ret = -ENOMEM; |
| 855 | |
| 856 | drm_global_init(); |
| 857 | drm_connector_ida_init(); |
| 858 | idr_init(&drm_minors_idr); |
| 859 | |
| 860 | if (register_chrdev(DRM_MAJOR, "drm", &drm_stub_fops)) |
| 861 | goto err_p1; |
| 862 | |
| 863 | drm_class = drm_sysfs_create(THIS_MODULE, "drm"); |
| 864 | if (IS_ERR(drm_class)) { |
| 865 | printk(KERN_ERR "DRM: Error creating drm class.\n"); |
| 866 | ret = PTR_ERR(drm_class); |
| 867 | goto err_p2; |
| 868 | } |
| 869 | |
| 870 | drm_debugfs_root = debugfs_create_dir("dri", NULL); |
| 871 | if (!drm_debugfs_root) { |
| 872 | DRM_ERROR("Cannot create /sys/kernel/debug/dri\n"); |
| 873 | ret = -1; |
| 874 | goto err_p3; |
| 875 | } |
| 876 | |
| 877 | DRM_INFO("Initialized %s %d.%d.%d %s\n", |
| 878 | CORE_NAME, CORE_MAJOR, CORE_MINOR, CORE_PATCHLEVEL, CORE_DATE); |
| 879 | return 0; |
| 880 | err_p3: |
| 881 | drm_sysfs_destroy(); |
| 882 | err_p2: |
| 883 | unregister_chrdev(DRM_MAJOR, "drm"); |
| 884 | |
| 885 | idr_destroy(&drm_minors_idr); |
| 886 | err_p1: |
| 887 | return ret; |
| 888 | } |
| 889 | |
| 890 | static void __exit drm_core_exit(void) |
| 891 | { |
| 892 | debugfs_remove(drm_debugfs_root); |
| 893 | drm_sysfs_destroy(); |
| 894 | |
| 895 | unregister_chrdev(DRM_MAJOR, "drm"); |
| 896 | |
| 897 | drm_connector_ida_destroy(); |
| 898 | idr_destroy(&drm_minors_idr); |
| 899 | } |
| 900 | |
| 901 | module_init(drm_core_init); |
| 902 | module_exit(drm_core_exit); |