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 | |
| 34 | #include <linux/module.h> |
| 35 | #include <linux/moduleparam.h> |
Tejun Heo | 5a0e3ad | 2010-03-24 17:04:11 +0900 | [diff] [blame] | 36 | #include <linux/slab.h> |
David Howells | 760285e | 2012-10-02 18:01:07 +0100 | [diff] [blame] | 37 | #include <drm/drmP.h> |
| 38 | #include <drm/drm_core.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 39 | |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame] | 40 | unsigned int drm_debug = 0; /* 1 to enable debug output */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 41 | EXPORT_SYMBOL(drm_debug); |
| 42 | |
David Herrmann | 1793126 | 2013-08-25 18:29:00 +0200 | [diff] [blame] | 43 | unsigned int drm_rnodes = 0; /* 1 to enable experimental render nodes API */ |
| 44 | EXPORT_SYMBOL(drm_rnodes); |
| 45 | |
Mario Kleiner | 27641c3 | 2010-10-23 04:20:23 +0200 | [diff] [blame] | 46 | unsigned int drm_vblank_offdelay = 5000; /* Default to 5000 msecs. */ |
| 47 | EXPORT_SYMBOL(drm_vblank_offdelay); |
| 48 | |
| 49 | unsigned int drm_timestamp_precision = 20; /* Default to 20 usecs. */ |
| 50 | EXPORT_SYMBOL(drm_timestamp_precision); |
| 51 | |
Imre Deak | c61eef7 | 2012-10-23 18:53:26 +0000 | [diff] [blame] | 52 | /* |
| 53 | * Default to use monotonic timestamps for wait-for-vblank and page-flip |
| 54 | * complete events. |
| 55 | */ |
| 56 | unsigned int drm_timestamp_monotonic = 1; |
| 57 | |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame] | 58 | MODULE_AUTHOR(CORE_AUTHOR); |
| 59 | MODULE_DESCRIPTION(CORE_DESC); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 60 | MODULE_LICENSE("GPL and additional rights"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 61 | MODULE_PARM_DESC(debug, "Enable debug output"); |
David Herrmann | 1793126 | 2013-08-25 18:29:00 +0200 | [diff] [blame] | 62 | MODULE_PARM_DESC(rnodes, "Enable experimental render nodes API"); |
Mario Kleiner | 27641c3 | 2010-10-23 04:20:23 +0200 | [diff] [blame] | 63 | MODULE_PARM_DESC(vblankoffdelay, "Delay until vblank irq auto-disable [msecs]"); |
| 64 | MODULE_PARM_DESC(timestamp_precision_usec, "Max. error on timestamps [usecs]"); |
Imre Deak | c61eef7 | 2012-10-23 18:53:26 +0000 | [diff] [blame] | 65 | MODULE_PARM_DESC(timestamp_monotonic, "Use monotonic timestamps"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 66 | |
Dave Jones | c075814 | 2005-10-03 15:02:20 -0400 | [diff] [blame] | 67 | module_param_named(debug, drm_debug, int, 0600); |
David Herrmann | 1793126 | 2013-08-25 18:29:00 +0200 | [diff] [blame] | 68 | module_param_named(rnodes, drm_rnodes, int, 0600); |
Mario Kleiner | 27641c3 | 2010-10-23 04:20:23 +0200 | [diff] [blame] | 69 | module_param_named(vblankoffdelay, drm_vblank_offdelay, int, 0600); |
| 70 | module_param_named(timestamp_precision_usec, drm_timestamp_precision, int, 0600); |
Imre Deak | c61eef7 | 2012-10-23 18:53:26 +0000 | [diff] [blame] | 71 | module_param_named(timestamp_monotonic, drm_timestamp_monotonic, int, 0600); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 72 | |
Dave Airlie | 2c14f28 | 2008-04-21 16:47:32 +1000 | [diff] [blame] | 73 | struct idr drm_minors_idr; |
| 74 | |
Greg Kroah-Hartman | 0650fd5 | 2006-01-20 14:08:59 -0800 | [diff] [blame] | 75 | struct class *drm_class; |
Ben Gamari | 955b12d | 2009-02-17 20:08:49 -0500 | [diff] [blame] | 76 | struct dentry *drm_debugfs_root; |
Joe Perches | 5ad3d88 | 2011-04-17 20:35:51 -0700 | [diff] [blame] | 77 | |
| 78 | int drm_err(const char *func, const char *format, ...) |
| 79 | { |
| 80 | struct va_format vaf; |
| 81 | va_list args; |
| 82 | int r; |
| 83 | |
| 84 | va_start(args, format); |
| 85 | |
| 86 | vaf.fmt = format; |
| 87 | vaf.va = &args; |
| 88 | |
| 89 | r = printk(KERN_ERR "[" DRM_NAME ":%s] *ERROR* %pV", func, &vaf); |
| 90 | |
| 91 | va_end(args); |
| 92 | |
| 93 | return r; |
| 94 | } |
| 95 | EXPORT_SYMBOL(drm_err); |
| 96 | |
yakui_zhao | 4fefcb2 | 2009-06-02 14:09:47 +0800 | [diff] [blame] | 97 | void drm_ut_debug_printk(unsigned int request_level, |
| 98 | const char *prefix, |
| 99 | const char *function_name, |
| 100 | const char *format, ...) |
| 101 | { |
Daniel Vetter | fffb906 | 2013-11-17 22:25:02 +0100 | [diff] [blame] | 102 | struct va_format vaf; |
yakui_zhao | 4fefcb2 | 2009-06-02 14:09:47 +0800 | [diff] [blame] | 103 | va_list args; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 104 | |
yakui_zhao | 4fefcb2 | 2009-06-02 14:09:47 +0800 | [diff] [blame] | 105 | if (drm_debug & request_level) { |
yakui_zhao | 4fefcb2 | 2009-06-02 14:09:47 +0800 | [diff] [blame] | 106 | va_start(args, format); |
Daniel Vetter | fffb906 | 2013-11-17 22:25:02 +0100 | [diff] [blame] | 107 | vaf.fmt = format; |
| 108 | vaf.va = &args; |
| 109 | |
| 110 | if (function_name) |
| 111 | printk(KERN_DEBUG "[%s:%s], %pV", prefix, |
| 112 | function_name, &vaf); |
| 113 | else |
| 114 | printk(KERN_DEBUG "%pV", &vaf); |
yakui_zhao | 4fefcb2 | 2009-06-02 14:09:47 +0800 | [diff] [blame] | 115 | va_end(args); |
| 116 | } |
| 117 | } |
| 118 | EXPORT_SYMBOL(drm_ut_debug_printk); |
Joe Perches | 5ad3d88 | 2011-04-17 20:35:51 -0700 | [diff] [blame] | 119 | |
Dave Airlie | 2c14f28 | 2008-04-21 16:47:32 +1000 | [diff] [blame] | 120 | static int drm_minor_get_id(struct drm_device *dev, int type) |
| 121 | { |
Dave Airlie | 2c14f28 | 2008-04-21 16:47:32 +1000 | [diff] [blame] | 122 | int ret; |
| 123 | int base = 0, limit = 63; |
| 124 | |
Dave Airlie | f453ba0 | 2008-11-07 14:05:41 -0800 | [diff] [blame] | 125 | if (type == DRM_MINOR_CONTROL) { |
Kristian Høgsberg | 24f4003 | 2013-08-08 19:10:21 +0200 | [diff] [blame] | 126 | base += 64; |
| 127 | limit = base + 63; |
| 128 | } else if (type == DRM_MINOR_RENDER) { |
| 129 | base += 128; |
| 130 | limit = base + 63; |
| 131 | } |
Dave Airlie | f453ba0 | 2008-11-07 14:05:41 -0800 | [diff] [blame] | 132 | |
Dave Airlie | 2c14f28 | 2008-04-21 16:47:32 +1000 | [diff] [blame] | 133 | mutex_lock(&dev->struct_mutex); |
Tejun Heo | 2e92881 | 2013-02-27 17:04:08 -0800 | [diff] [blame] | 134 | ret = idr_alloc(&drm_minors_idr, NULL, base, limit, GFP_KERNEL); |
Dave Airlie | 2c14f28 | 2008-04-21 16:47:32 +1000 | [diff] [blame] | 135 | mutex_unlock(&dev->struct_mutex); |
Dave Airlie | 2c14f28 | 2008-04-21 16:47:32 +1000 | [diff] [blame] | 136 | |
Tejun Heo | 2e92881 | 2013-02-27 17:04:08 -0800 | [diff] [blame] | 137 | return ret == -ENOSPC ? -EINVAL : ret; |
Dave Airlie | 2c14f28 | 2008-04-21 16:47:32 +1000 | [diff] [blame] | 138 | } |
| 139 | |
Dave Airlie | 7c1c287 | 2008-11-28 14:22:24 +1000 | [diff] [blame] | 140 | struct drm_master *drm_master_create(struct drm_minor *minor) |
| 141 | { |
| 142 | struct drm_master *master; |
| 143 | |
Eric Anholt | 9a298b2 | 2009-03-24 12:23:04 -0700 | [diff] [blame] | 144 | master = kzalloc(sizeof(*master), GFP_KERNEL); |
Dave Airlie | 7c1c287 | 2008-11-28 14:22:24 +1000 | [diff] [blame] | 145 | if (!master) |
| 146 | return NULL; |
| 147 | |
| 148 | kref_init(&master->refcount); |
| 149 | spin_lock_init(&master->lock.spinlock); |
| 150 | init_waitqueue_head(&master->lock.lock_queue); |
| 151 | drm_ht_create(&master->magiclist, DRM_MAGIC_HASH_ORDER); |
| 152 | INIT_LIST_HEAD(&master->magicfree); |
| 153 | master->minor = minor; |
| 154 | |
| 155 | list_add_tail(&master->head, &minor->master_list); |
| 156 | |
| 157 | return master; |
| 158 | } |
| 159 | |
| 160 | struct drm_master *drm_master_get(struct drm_master *master) |
| 161 | { |
| 162 | kref_get(&master->refcount); |
| 163 | return master; |
| 164 | } |
Thomas Hellstrom | 85bb0c3 | 2009-12-06 21:46:28 +0100 | [diff] [blame] | 165 | EXPORT_SYMBOL(drm_master_get); |
Dave Airlie | 7c1c287 | 2008-11-28 14:22:24 +1000 | [diff] [blame] | 166 | |
| 167 | static void drm_master_destroy(struct kref *kref) |
| 168 | { |
| 169 | struct drm_master *master = container_of(kref, struct drm_master, refcount); |
| 170 | struct drm_magic_entry *pt, *next; |
| 171 | struct drm_device *dev = master->minor->dev; |
Dave Airlie | c1ff85d | 2009-01-19 17:17:58 +1000 | [diff] [blame] | 172 | struct drm_map_list *r_list, *list_temp; |
Dave Airlie | 7c1c287 | 2008-11-28 14:22:24 +1000 | [diff] [blame] | 173 | |
| 174 | list_del(&master->head); |
| 175 | |
| 176 | if (dev->driver->master_destroy) |
| 177 | dev->driver->master_destroy(dev, master); |
| 178 | |
Dave Airlie | c1ff85d | 2009-01-19 17:17:58 +1000 | [diff] [blame] | 179 | list_for_each_entry_safe(r_list, list_temp, &dev->maplist, head) { |
| 180 | if (r_list->master == master) { |
| 181 | drm_rmmap_locked(dev, r_list->map); |
| 182 | r_list = NULL; |
| 183 | } |
| 184 | } |
| 185 | |
Dave Airlie | 7c1c287 | 2008-11-28 14:22:24 +1000 | [diff] [blame] | 186 | if (master->unique) { |
Eric Anholt | 9a298b2 | 2009-03-24 12:23:04 -0700 | [diff] [blame] | 187 | kfree(master->unique); |
Dave Airlie | 7c1c287 | 2008-11-28 14:22:24 +1000 | [diff] [blame] | 188 | master->unique = NULL; |
| 189 | master->unique_len = 0; |
| 190 | } |
| 191 | |
Chris Wilson | 6e35023 | 2010-07-24 18:29:36 +0100 | [diff] [blame] | 192 | kfree(dev->devname); |
| 193 | dev->devname = NULL; |
| 194 | |
Dave Airlie | 7c1c287 | 2008-11-28 14:22:24 +1000 | [diff] [blame] | 195 | list_for_each_entry_safe(pt, next, &master->magicfree, head) { |
| 196 | list_del(&pt->head); |
| 197 | drm_ht_remove_item(&master->magiclist, &pt->hash_item); |
Eric Anholt | 9a298b2 | 2009-03-24 12:23:04 -0700 | [diff] [blame] | 198 | kfree(pt); |
Dave Airlie | 7c1c287 | 2008-11-28 14:22:24 +1000 | [diff] [blame] | 199 | } |
| 200 | |
| 201 | drm_ht_remove(&master->magiclist); |
| 202 | |
Eric Anholt | 9a298b2 | 2009-03-24 12:23:04 -0700 | [diff] [blame] | 203 | kfree(master); |
Dave Airlie | 7c1c287 | 2008-11-28 14:22:24 +1000 | [diff] [blame] | 204 | } |
| 205 | |
| 206 | void drm_master_put(struct drm_master **master) |
| 207 | { |
| 208 | kref_put(&(*master)->refcount, drm_master_destroy); |
| 209 | *master = NULL; |
| 210 | } |
Thomas Hellstrom | 85bb0c3 | 2009-12-06 21:46:28 +0100 | [diff] [blame] | 211 | EXPORT_SYMBOL(drm_master_put); |
Dave Airlie | 7c1c287 | 2008-11-28 14:22:24 +1000 | [diff] [blame] | 212 | |
| 213 | int drm_setmaster_ioctl(struct drm_device *dev, void *data, |
| 214 | struct drm_file *file_priv) |
| 215 | { |
Benjamin Gaignard | 53ef160 | 2013-06-26 17:58:59 +0200 | [diff] [blame] | 216 | int ret = 0; |
Thomas Hellstrom | 862302f | 2009-12-02 18:15:25 +0000 | [diff] [blame] | 217 | |
Jonas Bonn | 6b00842 | 2009-04-16 09:00:02 +0200 | [diff] [blame] | 218 | if (file_priv->is_master) |
| 219 | return 0; |
| 220 | |
Dave Airlie | 7c1c287 | 2008-11-28 14:22:24 +1000 | [diff] [blame] | 221 | if (file_priv->minor->master && file_priv->minor->master != file_priv->master) |
| 222 | return -EINVAL; |
| 223 | |
| 224 | if (!file_priv->master) |
| 225 | return -EINVAL; |
| 226 | |
David Herrmann | 08bec5b | 2012-11-15 13:04:37 +0000 | [diff] [blame] | 227 | if (file_priv->minor->master) |
| 228 | return -EINVAL; |
| 229 | |
| 230 | mutex_lock(&dev->struct_mutex); |
| 231 | file_priv->minor->master = drm_master_get(file_priv->master); |
| 232 | file_priv->is_master = 1; |
| 233 | if (dev->driver->master_set) { |
| 234 | ret = dev->driver->master_set(dev, file_priv, false); |
| 235 | if (unlikely(ret != 0)) { |
| 236 | file_priv->is_master = 0; |
| 237 | drm_master_put(&file_priv->minor->master); |
Thomas Hellstrom | 862302f | 2009-12-02 18:15:25 +0000 | [diff] [blame] | 238 | } |
Dave Airlie | 7c1c287 | 2008-11-28 14:22:24 +1000 | [diff] [blame] | 239 | } |
David Herrmann | 08bec5b | 2012-11-15 13:04:37 +0000 | [diff] [blame] | 240 | mutex_unlock(&dev->struct_mutex); |
Dave Airlie | 7c1c287 | 2008-11-28 14:22:24 +1000 | [diff] [blame] | 241 | |
Benjamin Gaignard | 53ef160 | 2013-06-26 17:58:59 +0200 | [diff] [blame] | 242 | return ret; |
Dave Airlie | 7c1c287 | 2008-11-28 14:22:24 +1000 | [diff] [blame] | 243 | } |
| 244 | |
| 245 | int drm_dropmaster_ioctl(struct drm_device *dev, void *data, |
| 246 | struct drm_file *file_priv) |
| 247 | { |
Jonas Bonn | 6b00842 | 2009-04-16 09:00:02 +0200 | [diff] [blame] | 248 | if (!file_priv->is_master) |
Dave Airlie | 7c1c287 | 2008-11-28 14:22:24 +1000 | [diff] [blame] | 249 | return -EINVAL; |
Jonas Bonn | 6b00842 | 2009-04-16 09:00:02 +0200 | [diff] [blame] | 250 | |
Dave Airlie | 07f1c7a | 2009-04-20 09:32:50 +1000 | [diff] [blame] | 251 | if (!file_priv->minor->master) |
| 252 | return -EINVAL; |
| 253 | |
Dave Airlie | 7c1c287 | 2008-11-28 14:22:24 +1000 | [diff] [blame] | 254 | mutex_lock(&dev->struct_mutex); |
Thomas Hellstrom | 862302f | 2009-12-02 18:15:25 +0000 | [diff] [blame] | 255 | if (dev->driver->master_drop) |
| 256 | dev->driver->master_drop(dev, file_priv, false); |
Dave Airlie | 7c1c287 | 2008-11-28 14:22:24 +1000 | [diff] [blame] | 257 | drm_master_put(&file_priv->minor->master); |
Jonas Bonn | 6b00842 | 2009-04-16 09:00:02 +0200 | [diff] [blame] | 258 | file_priv->is_master = 0; |
Dave Airlie | 7c1c287 | 2008-11-28 14:22:24 +1000 | [diff] [blame] | 259 | mutex_unlock(&dev->struct_mutex); |
| 260 | return 0; |
| 261 | } |
| 262 | |
David Herrmann | 05b701f | 2014-01-29 12:43:56 +0100 | [diff] [blame] | 263 | static struct drm_minor **drm_minor_get_slot(struct drm_device *dev, |
| 264 | unsigned int type) |
| 265 | { |
| 266 | switch (type) { |
| 267 | case DRM_MINOR_LEGACY: |
| 268 | return &dev->primary; |
| 269 | case DRM_MINOR_RENDER: |
| 270 | return &dev->render; |
| 271 | case DRM_MINOR_CONTROL: |
| 272 | return &dev->control; |
| 273 | default: |
| 274 | return NULL; |
| 275 | } |
| 276 | } |
| 277 | |
| 278 | static int drm_minor_alloc(struct drm_device *dev, unsigned int type) |
| 279 | { |
| 280 | struct drm_minor *minor; |
| 281 | |
| 282 | minor = kzalloc(sizeof(*minor), GFP_KERNEL); |
| 283 | if (!minor) |
| 284 | return -ENOMEM; |
| 285 | |
| 286 | minor->type = type; |
| 287 | minor->dev = dev; |
| 288 | INIT_LIST_HEAD(&minor->master_list); |
| 289 | |
| 290 | *drm_minor_get_slot(dev, type) = minor; |
| 291 | return 0; |
| 292 | } |
| 293 | |
David Herrmann | bd9dfa9 | 2014-01-29 12:55:48 +0100 | [diff] [blame^] | 294 | static void drm_minor_free(struct drm_device *dev, unsigned int type) |
| 295 | { |
| 296 | struct drm_minor **slot; |
| 297 | |
| 298 | slot = drm_minor_get_slot(dev, type); |
| 299 | if (*slot) { |
| 300 | kfree(*slot); |
| 301 | *slot = NULL; |
| 302 | } |
| 303 | } |
| 304 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 305 | /** |
David Herrmann | 05b701f | 2014-01-29 12:43:56 +0100 | [diff] [blame] | 306 | * drm_get_minor - Register DRM minor |
David Herrmann | a99ee45 | 2013-10-20 18:55:42 +0200 | [diff] [blame] | 307 | * @dev: DRM device |
David Herrmann | a99ee45 | 2013-10-20 18:55:42 +0200 | [diff] [blame] | 308 | * @type: Type of minor |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 309 | * |
David Herrmann | 05b701f | 2014-01-29 12:43:56 +0100 | [diff] [blame] | 310 | * Register minor of given type. |
David Herrmann | a99ee45 | 2013-10-20 18:55:42 +0200 | [diff] [blame] | 311 | * Caller must hold the global DRM mutex. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 312 | * |
David Herrmann | a99ee45 | 2013-10-20 18:55:42 +0200 | [diff] [blame] | 313 | * RETURNS: |
| 314 | * 0 on success, negative error code on failure. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 315 | */ |
David Herrmann | 05b701f | 2014-01-29 12:43:56 +0100 | [diff] [blame] | 316 | static int drm_get_minor(struct drm_device *dev, unsigned int type) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 317 | { |
Dave Airlie | 2c14f28 | 2008-04-21 16:47:32 +1000 | [diff] [blame] | 318 | struct drm_minor *new_minor; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 319 | int ret; |
Dave Airlie | 2c14f28 | 2008-04-21 16:47:32 +1000 | [diff] [blame] | 320 | int minor_id; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 321 | |
| 322 | DRM_DEBUG("\n"); |
| 323 | |
David Herrmann | 05b701f | 2014-01-29 12:43:56 +0100 | [diff] [blame] | 324 | new_minor = *drm_minor_get_slot(dev, type); |
| 325 | if (!new_minor) |
| 326 | return 0; |
| 327 | |
Dave Airlie | 2c14f28 | 2008-04-21 16:47:32 +1000 | [diff] [blame] | 328 | minor_id = drm_minor_get_id(dev, type); |
| 329 | if (minor_id < 0) |
| 330 | return minor_id; |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame] | 331 | |
Dave Airlie | 2c14f28 | 2008-04-21 16:47:32 +1000 | [diff] [blame] | 332 | new_minor->device = MKDEV(DRM_MAJOR, minor_id); |
Dave Airlie | 2c14f28 | 2008-04-21 16:47:32 +1000 | [diff] [blame] | 333 | new_minor->index = minor_id; |
| 334 | |
| 335 | idr_replace(&drm_minors_idr, new_minor, minor_id); |
| 336 | |
Ben Gamari | 955b12d | 2009-02-17 20:08:49 -0500 | [diff] [blame] | 337 | #if defined(CONFIG_DEBUG_FS) |
| 338 | ret = drm_debugfs_init(new_minor, minor_id, drm_debugfs_root); |
| 339 | if (ret) { |
GeunSik Lim | 156f5a7 | 2009-06-02 15:01:37 +0900 | [diff] [blame] | 340 | DRM_ERROR("DRM: Failed to initialize /sys/kernel/debug/dri.\n"); |
Daniel Vetter | cb6458f | 2013-08-08 15:41:34 +0200 | [diff] [blame] | 341 | goto err_mem; |
Ben Gamari | 955b12d | 2009-02-17 20:08:49 -0500 | [diff] [blame] | 342 | } |
| 343 | #endif |
Dave Airlie | 2c14f28 | 2008-04-21 16:47:32 +1000 | [diff] [blame] | 344 | |
| 345 | ret = drm_sysfs_device_add(new_minor); |
| 346 | if (ret) { |
| 347 | printk(KERN_ERR |
| 348 | "DRM: Error sysfs_device_add.\n"); |
Daniel Vetter | cb6458f | 2013-08-08 15:41:34 +0200 | [diff] [blame] | 349 | goto err_debugfs; |
Dave Airlie | 2c14f28 | 2008-04-21 16:47:32 +1000 | [diff] [blame] | 350 | } |
Dave Airlie | 2c14f28 | 2008-04-21 16:47:32 +1000 | [diff] [blame] | 351 | |
| 352 | DRM_DEBUG("new minor assigned %d\n", minor_id); |
| 353 | return 0; |
| 354 | |
| 355 | |
Daniel Vetter | cb6458f | 2013-08-08 15:41:34 +0200 | [diff] [blame] | 356 | err_debugfs: |
| 357 | #if defined(CONFIG_DEBUG_FS) |
| 358 | drm_debugfs_cleanup(new_minor); |
Dave Airlie | 2c14f28 | 2008-04-21 16:47:32 +1000 | [diff] [blame] | 359 | err_mem: |
Daniel Vetter | cb6458f | 2013-08-08 15:41:34 +0200 | [diff] [blame] | 360 | #endif |
Dave Airlie | 2c14f28 | 2008-04-21 16:47:32 +1000 | [diff] [blame] | 361 | idr_remove(&drm_minors_idr, minor_id); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 362 | return ret; |
| 363 | } |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame] | 364 | |
Dave Airlie | c94f702 | 2005-07-07 21:03:38 +1000 | [diff] [blame] | 365 | /** |
David Herrmann | f73aca5 | 2013-10-20 18:55:40 +0200 | [diff] [blame] | 366 | * drm_unplug_minor - Unplug DRM minor |
| 367 | * @minor: Minor to unplug |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 368 | * |
David Herrmann | f73aca5 | 2013-10-20 18:55:40 +0200 | [diff] [blame] | 369 | * Unplugs the given DRM minor but keeps the object. So after this returns, |
| 370 | * minor->dev is still valid so existing open-files can still access it to get |
| 371 | * device information from their drm_file ojects. |
| 372 | * If the minor is already unplugged or if @minor is NULL, nothing is done. |
| 373 | * The global DRM mutex must be held by the caller. |
| 374 | */ |
| 375 | static void drm_unplug_minor(struct drm_minor *minor) |
| 376 | { |
David Herrmann | a348335 | 2013-11-13 11:42:26 +0100 | [diff] [blame] | 377 | if (!minor || !minor->kdev) |
David Herrmann | f73aca5 | 2013-10-20 18:55:40 +0200 | [diff] [blame] | 378 | return; |
| 379 | |
David Herrmann | 865fb47 | 2013-10-20 18:55:43 +0200 | [diff] [blame] | 380 | #if defined(CONFIG_DEBUG_FS) |
| 381 | drm_debugfs_cleanup(minor); |
| 382 | #endif |
| 383 | |
David Herrmann | f73aca5 | 2013-10-20 18:55:40 +0200 | [diff] [blame] | 384 | drm_sysfs_device_remove(minor); |
David Herrmann | f67e946 | 2013-10-20 18:55:44 +0200 | [diff] [blame] | 385 | idr_remove(&drm_minors_idr, minor->index); |
David Herrmann | f73aca5 | 2013-10-20 18:55:40 +0200 | [diff] [blame] | 386 | } |
| 387 | |
| 388 | /** |
David Herrmann | 1616c52 | 2014-01-29 10:49:19 +0100 | [diff] [blame] | 389 | * drm_minor_acquire - Acquire a DRM minor |
| 390 | * @minor_id: Minor ID of the DRM-minor |
| 391 | * |
| 392 | * Looks up the given minor-ID and returns the respective DRM-minor object. The |
| 393 | * refence-count of the underlying device is increased so you must release this |
| 394 | * object with drm_minor_release(). |
| 395 | * |
| 396 | * As long as you hold this minor, it is guaranteed that the object and the |
| 397 | * minor->dev pointer will stay valid! However, the device may get unplugged and |
| 398 | * unregistered while you hold the minor. |
| 399 | * |
| 400 | * Returns: |
| 401 | * Pointer to minor-object with increased device-refcount, or PTR_ERR on |
| 402 | * failure. |
| 403 | */ |
| 404 | struct drm_minor *drm_minor_acquire(unsigned int minor_id) |
| 405 | { |
| 406 | struct drm_minor *minor; |
| 407 | |
| 408 | minor = idr_find(&drm_minors_idr, minor_id); |
| 409 | if (!minor) |
| 410 | return ERR_PTR(-ENODEV); |
| 411 | |
| 412 | drm_dev_ref(minor->dev); |
| 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); |
| 425 | } |
| 426 | |
| 427 | /** |
Kristian Høgsberg | 112b715 | 2009-01-04 16:55:33 -0500 | [diff] [blame] | 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 */ |
| 451 | if (drm_core_check_feature(dev, DRIVER_MODESET)) |
| 452 | drm_unplug_minor(dev->control); |
David Herrmann | 1793126 | 2013-08-25 18:29:00 +0200 | [diff] [blame] | 453 | if (dev->render) |
| 454 | drm_unplug_minor(dev->render); |
Dave Airlie | 2c07a21 | 2012-02-20 14:18:07 +0000 | [diff] [blame] | 455 | drm_unplug_minor(dev->primary); |
| 456 | |
| 457 | mutex_lock(&drm_global_mutex); |
| 458 | |
| 459 | drm_device_set_unplugged(dev); |
| 460 | |
| 461 | if (dev->open_count == 0) { |
| 462 | drm_put_dev(dev); |
| 463 | } |
| 464 | mutex_unlock(&drm_global_mutex); |
| 465 | } |
| 466 | EXPORT_SYMBOL(drm_unplug_dev); |
David Herrmann | 1bb7253 | 2013-10-02 11:23:34 +0200 | [diff] [blame] | 467 | |
| 468 | /** |
| 469 | * drm_dev_alloc - Allocate new drm device |
| 470 | * @driver: DRM driver to allocate device for |
| 471 | * @parent: Parent device object |
| 472 | * |
| 473 | * Allocate and initialize a new DRM device. No device registration is done. |
David Herrmann | c22f0ac | 2013-10-02 11:23:35 +0200 | [diff] [blame] | 474 | * Call drm_dev_register() to advertice the device to user space and register it |
| 475 | * with other core subsystems. |
David Herrmann | 1bb7253 | 2013-10-02 11:23:34 +0200 | [diff] [blame] | 476 | * |
David Herrmann | 099d1c2 | 2014-01-29 10:21:36 +0100 | [diff] [blame] | 477 | * The initial ref-count of the object is 1. Use drm_dev_ref() and |
| 478 | * drm_dev_unref() to take and drop further ref-counts. |
| 479 | * |
David Herrmann | 1bb7253 | 2013-10-02 11:23:34 +0200 | [diff] [blame] | 480 | * RETURNS: |
| 481 | * Pointer to new DRM device, or NULL if out of memory. |
| 482 | */ |
| 483 | struct drm_device *drm_dev_alloc(struct drm_driver *driver, |
| 484 | struct device *parent) |
| 485 | { |
| 486 | struct drm_device *dev; |
| 487 | int ret; |
| 488 | |
| 489 | dev = kzalloc(sizeof(*dev), GFP_KERNEL); |
| 490 | if (!dev) |
| 491 | return NULL; |
| 492 | |
David Herrmann | 099d1c2 | 2014-01-29 10:21:36 +0100 | [diff] [blame] | 493 | kref_init(&dev->ref); |
David Herrmann | 1bb7253 | 2013-10-02 11:23:34 +0200 | [diff] [blame] | 494 | dev->dev = parent; |
| 495 | dev->driver = driver; |
| 496 | |
| 497 | INIT_LIST_HEAD(&dev->filelist); |
| 498 | INIT_LIST_HEAD(&dev->ctxlist); |
| 499 | INIT_LIST_HEAD(&dev->vmalist); |
| 500 | INIT_LIST_HEAD(&dev->maplist); |
| 501 | INIT_LIST_HEAD(&dev->vblank_event_list); |
| 502 | |
| 503 | spin_lock_init(&dev->count_lock); |
| 504 | spin_lock_init(&dev->event_lock); |
| 505 | mutex_init(&dev->struct_mutex); |
| 506 | mutex_init(&dev->ctxlist_mutex); |
| 507 | |
David Herrmann | 05b701f | 2014-01-29 12:43:56 +0100 | [diff] [blame] | 508 | if (drm_core_check_feature(dev, DRIVER_MODESET)) { |
| 509 | ret = drm_minor_alloc(dev, DRM_MINOR_CONTROL); |
| 510 | if (ret) |
| 511 | goto err_minors; |
| 512 | } |
| 513 | |
| 514 | if (drm_core_check_feature(dev, DRIVER_RENDER) && drm_rnodes) { |
| 515 | ret = drm_minor_alloc(dev, DRM_MINOR_RENDER); |
| 516 | if (ret) |
| 517 | goto err_minors; |
| 518 | } |
| 519 | |
| 520 | ret = drm_minor_alloc(dev, DRM_MINOR_LEGACY); |
| 521 | if (ret) |
| 522 | goto err_minors; |
| 523 | |
David Herrmann | 1bb7253 | 2013-10-02 11:23:34 +0200 | [diff] [blame] | 524 | if (drm_ht_create(&dev->map_hash, 12)) |
David Herrmann | 05b701f | 2014-01-29 12:43:56 +0100 | [diff] [blame] | 525 | goto err_minors; |
David Herrmann | 1bb7253 | 2013-10-02 11:23:34 +0200 | [diff] [blame] | 526 | |
| 527 | ret = drm_ctxbitmap_init(dev); |
| 528 | if (ret) { |
| 529 | DRM_ERROR("Cannot allocate memory for context bitmap.\n"); |
| 530 | goto err_ht; |
| 531 | } |
| 532 | |
| 533 | if (driver->driver_features & DRIVER_GEM) { |
| 534 | ret = drm_gem_init(dev); |
| 535 | if (ret) { |
| 536 | DRM_ERROR("Cannot initialize graphics execution manager (GEM)\n"); |
| 537 | goto err_ctxbitmap; |
| 538 | } |
| 539 | } |
| 540 | |
| 541 | return dev; |
| 542 | |
| 543 | err_ctxbitmap: |
| 544 | drm_ctxbitmap_cleanup(dev); |
| 545 | err_ht: |
| 546 | drm_ht_remove(&dev->map_hash); |
David Herrmann | 05b701f | 2014-01-29 12:43:56 +0100 | [diff] [blame] | 547 | err_minors: |
David Herrmann | bd9dfa9 | 2014-01-29 12:55:48 +0100 | [diff] [blame^] | 548 | drm_minor_free(dev, DRM_MINOR_LEGACY); |
| 549 | drm_minor_free(dev, DRM_MINOR_RENDER); |
| 550 | drm_minor_free(dev, DRM_MINOR_CONTROL); |
David Herrmann | 1bb7253 | 2013-10-02 11:23:34 +0200 | [diff] [blame] | 551 | kfree(dev); |
| 552 | return NULL; |
| 553 | } |
| 554 | EXPORT_SYMBOL(drm_dev_alloc); |
David Herrmann | c22f0ac | 2013-10-02 11:23:35 +0200 | [diff] [blame] | 555 | |
David Herrmann | 099d1c2 | 2014-01-29 10:21:36 +0100 | [diff] [blame] | 556 | static void drm_dev_release(struct kref *ref) |
David Herrmann | 0dc8fe5 | 2013-10-02 11:23:37 +0200 | [diff] [blame] | 557 | { |
David Herrmann | 099d1c2 | 2014-01-29 10:21:36 +0100 | [diff] [blame] | 558 | struct drm_device *dev = container_of(ref, struct drm_device, ref); |
| 559 | |
David Herrmann | 0dc8fe5 | 2013-10-02 11:23:37 +0200 | [diff] [blame] | 560 | if (dev->driver->driver_features & DRIVER_GEM) |
| 561 | drm_gem_destroy(dev); |
| 562 | |
| 563 | drm_ctxbitmap_cleanup(dev); |
| 564 | drm_ht_remove(&dev->map_hash); |
| 565 | |
David Herrmann | bd9dfa9 | 2014-01-29 12:55:48 +0100 | [diff] [blame^] | 566 | drm_minor_free(dev, DRM_MINOR_LEGACY); |
| 567 | drm_minor_free(dev, DRM_MINOR_RENDER); |
| 568 | drm_minor_free(dev, DRM_MINOR_CONTROL); |
| 569 | |
David Herrmann | 0dc8fe5 | 2013-10-02 11:23:37 +0200 | [diff] [blame] | 570 | kfree(dev->devname); |
| 571 | kfree(dev); |
| 572 | } |
David Herrmann | 099d1c2 | 2014-01-29 10:21:36 +0100 | [diff] [blame] | 573 | |
| 574 | /** |
| 575 | * drm_dev_ref - Take reference of a DRM device |
| 576 | * @dev: device to take reference of or NULL |
| 577 | * |
| 578 | * This increases the ref-count of @dev by one. You *must* already own a |
| 579 | * reference when calling this. Use drm_dev_unref() to drop this reference |
| 580 | * again. |
| 581 | * |
| 582 | * This function never fails. However, this function does not provide *any* |
| 583 | * guarantee whether the device is alive or running. It only provides a |
| 584 | * reference to the object and the memory associated with it. |
| 585 | */ |
| 586 | void drm_dev_ref(struct drm_device *dev) |
| 587 | { |
| 588 | if (dev) |
| 589 | kref_get(&dev->ref); |
| 590 | } |
| 591 | EXPORT_SYMBOL(drm_dev_ref); |
| 592 | |
| 593 | /** |
| 594 | * drm_dev_unref - Drop reference of a DRM device |
| 595 | * @dev: device to drop reference of or NULL |
| 596 | * |
| 597 | * This decreases the ref-count of @dev by one. The device is destroyed if the |
| 598 | * ref-count drops to zero. |
| 599 | */ |
| 600 | void drm_dev_unref(struct drm_device *dev) |
| 601 | { |
| 602 | if (dev) |
| 603 | kref_put(&dev->ref, drm_dev_release); |
| 604 | } |
| 605 | EXPORT_SYMBOL(drm_dev_unref); |
David Herrmann | 0dc8fe5 | 2013-10-02 11:23:37 +0200 | [diff] [blame] | 606 | |
| 607 | /** |
David Herrmann | c22f0ac | 2013-10-02 11:23:35 +0200 | [diff] [blame] | 608 | * drm_dev_register - Register DRM device |
| 609 | * @dev: Device to register |
| 610 | * |
| 611 | * Register the DRM device @dev with the system, advertise device to user-space |
| 612 | * and start normal device operation. @dev must be allocated via drm_dev_alloc() |
| 613 | * previously. |
| 614 | * |
| 615 | * Never call this twice on any device! |
| 616 | * |
| 617 | * RETURNS: |
| 618 | * 0 on success, negative error code on failure. |
| 619 | */ |
| 620 | int drm_dev_register(struct drm_device *dev, unsigned long flags) |
| 621 | { |
| 622 | int ret; |
| 623 | |
| 624 | mutex_lock(&drm_global_mutex); |
| 625 | |
David Herrmann | 05b701f | 2014-01-29 12:43:56 +0100 | [diff] [blame] | 626 | ret = drm_get_minor(dev, DRM_MINOR_CONTROL); |
David Herrmann | c22f0ac | 2013-10-02 11:23:35 +0200 | [diff] [blame] | 627 | if (ret) |
David Herrmann | 05b701f | 2014-01-29 12:43:56 +0100 | [diff] [blame] | 628 | goto err_minors; |
| 629 | |
| 630 | ret = drm_get_minor(dev, DRM_MINOR_RENDER); |
| 631 | if (ret) |
| 632 | goto err_minors; |
| 633 | |
| 634 | ret = drm_get_minor(dev, DRM_MINOR_LEGACY); |
| 635 | if (ret) |
| 636 | goto err_minors; |
David Herrmann | c22f0ac | 2013-10-02 11:23:35 +0200 | [diff] [blame] | 637 | |
| 638 | if (dev->driver->load) { |
| 639 | ret = dev->driver->load(dev, flags); |
| 640 | if (ret) |
David Herrmann | 05b701f | 2014-01-29 12:43:56 +0100 | [diff] [blame] | 641 | goto err_minors; |
David Herrmann | c22f0ac | 2013-10-02 11:23:35 +0200 | [diff] [blame] | 642 | } |
| 643 | |
| 644 | /* setup grouping for legacy outputs */ |
| 645 | if (drm_core_check_feature(dev, DRIVER_MODESET)) { |
| 646 | ret = drm_mode_group_init_legacy_group(dev, |
| 647 | &dev->primary->mode_group); |
| 648 | if (ret) |
| 649 | goto err_unload; |
| 650 | } |
| 651 | |
David Herrmann | c22f0ac | 2013-10-02 11:23:35 +0200 | [diff] [blame] | 652 | ret = 0; |
| 653 | goto out_unlock; |
| 654 | |
| 655 | err_unload: |
| 656 | if (dev->driver->unload) |
| 657 | dev->driver->unload(dev); |
David Herrmann | 05b701f | 2014-01-29 12:43:56 +0100 | [diff] [blame] | 658 | err_minors: |
Ilia Mirkin | 0f58411 | 2013-12-05 09:42:49 -0500 | [diff] [blame] | 659 | drm_unplug_minor(dev->control); |
David Herrmann | 05b701f | 2014-01-29 12:43:56 +0100 | [diff] [blame] | 660 | drm_unplug_minor(dev->render); |
| 661 | drm_unplug_minor(dev->primary); |
David Herrmann | c22f0ac | 2013-10-02 11:23:35 +0200 | [diff] [blame] | 662 | out_unlock: |
| 663 | mutex_unlock(&drm_global_mutex); |
| 664 | return ret; |
| 665 | } |
| 666 | EXPORT_SYMBOL(drm_dev_register); |
David Herrmann | c3a4973 | 2013-10-02 11:23:38 +0200 | [diff] [blame] | 667 | |
| 668 | /** |
| 669 | * drm_dev_unregister - Unregister DRM device |
| 670 | * @dev: Device to unregister |
| 671 | * |
| 672 | * Unregister the DRM device from the system. This does the reverse of |
| 673 | * 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] | 674 | * drm_dev_unref() to drop their final reference. |
David Herrmann | c3a4973 | 2013-10-02 11:23:38 +0200 | [diff] [blame] | 675 | */ |
| 676 | void drm_dev_unregister(struct drm_device *dev) |
| 677 | { |
| 678 | struct drm_map_list *r_list, *list_temp; |
| 679 | |
| 680 | drm_lastclose(dev); |
| 681 | |
| 682 | if (dev->driver->unload) |
| 683 | dev->driver->unload(dev); |
| 684 | |
Daniel Vetter | 4efafeb | 2013-12-11 11:34:38 +0100 | [diff] [blame] | 685 | if (dev->agp) |
| 686 | drm_pci_agp_destroy(dev); |
David Herrmann | c3a4973 | 2013-10-02 11:23:38 +0200 | [diff] [blame] | 687 | |
| 688 | drm_vblank_cleanup(dev); |
| 689 | |
| 690 | list_for_each_entry_safe(r_list, list_temp, &dev->maplist, head) |
| 691 | drm_rmmap(dev, r_list->map); |
| 692 | |
David Herrmann | 8f6599d | 2013-10-20 18:55:45 +0200 | [diff] [blame] | 693 | drm_unplug_minor(dev->control); |
| 694 | drm_unplug_minor(dev->render); |
| 695 | drm_unplug_minor(dev->primary); |
David Herrmann | c3a4973 | 2013-10-02 11:23:38 +0200 | [diff] [blame] | 696 | } |
| 697 | EXPORT_SYMBOL(drm_dev_unregister); |