blob: 40be746b7e685ef2d205e700f15ca5c3c38a8afe [file] [log] [blame]
Linus Torvalds1da177e2005-04-16 15:20:36 -07001/*
2 * Created: Fri Jan 8 09:01:26 1999 by faith@valinux.com
3 *
4 * Copyright 1999 Precision Insight, Inc., Cedar Park, Texas.
5 * Copyright 2000 VA Linux Systems, Inc., Sunnyvale, California.
6 * All Rights Reserved.
7 *
David Herrmannec8f1122014-07-23 14:14:53 +02008 * Author Rickard E. (Rik) Faith <faith@valinux.com>
9 * Author Gareth Hughes <gareth@valinux.com>
10 *
Linus Torvalds1da177e2005-04-16 15:20:36 -070011 * Permission is hereby granted, free of charge, to any person obtaining a
12 * copy of this software and associated documentation files (the "Software"),
13 * to deal in the Software without restriction, including without limitation
14 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
15 * and/or sell copies of the Software, and to permit persons to whom the
16 * Software is furnished to do so, subject to the following conditions:
17 *
18 * The above copyright notice and this permission notice (including the next
19 * paragraph) shall be included in all copies or substantial portions of the
20 * Software.
21 *
22 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
23 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
24 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
25 * VA LINUX SYSTEMS AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM, DAMAGES OR
26 * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
27 * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
28 * OTHER DEALINGS IN THE SOFTWARE.
29 */
30
David Howells760285e2012-10-02 18:01:07 +010031#include <drm/drmP.h>
32#include <drm/drm_core.h>
David Herrmanne7b960702014-07-24 12:10:04 +020033#include "drm_legacy.h"
Linus Torvalds1da177e2005-04-16 15:20:36 -070034
David Howells760285e2012-10-02 18:01:07 +010035#include <linux/pci.h>
36#include <linux/export.h>
Andy Lutomirski0dd99f12013-05-13 23:58:48 +000037#ifdef CONFIG_X86
38#include <asm/mtrr.h>
39#endif
Linus Torvalds1da177e2005-04-16 15:20:36 -070040
David Herrmannec8f1122014-07-23 14:14:53 +020041static int drm_version(struct drm_device *dev, void *data,
42 struct drm_file *file_priv);
43
44#define DRM_IOCTL_DEF(ioctl, _func, _flags) \
45 [DRM_IOCTL_NR(ioctl)] = {.cmd = ioctl, .func = _func, .flags = _flags, .cmd_drv = 0, .name = #ioctl}
46
47/** Ioctl table */
48static const struct drm_ioctl_desc drm_ioctls[] = {
49 DRM_IOCTL_DEF(DRM_IOCTL_VERSION, drm_version, DRM_UNLOCKED|DRM_RENDER_ALLOW),
50 DRM_IOCTL_DEF(DRM_IOCTL_GET_UNIQUE, drm_getunique, 0),
51 DRM_IOCTL_DEF(DRM_IOCTL_GET_MAGIC, drm_getmagic, 0),
52 DRM_IOCTL_DEF(DRM_IOCTL_IRQ_BUSID, drm_irq_by_busid, DRM_MASTER|DRM_ROOT_ONLY),
53 DRM_IOCTL_DEF(DRM_IOCTL_GET_MAP, drm_getmap, DRM_UNLOCKED),
54 DRM_IOCTL_DEF(DRM_IOCTL_GET_CLIENT, drm_getclient, DRM_UNLOCKED),
55 DRM_IOCTL_DEF(DRM_IOCTL_GET_STATS, drm_getstats, DRM_UNLOCKED),
56 DRM_IOCTL_DEF(DRM_IOCTL_GET_CAP, drm_getcap, DRM_UNLOCKED|DRM_RENDER_ALLOW),
57 DRM_IOCTL_DEF(DRM_IOCTL_SET_CLIENT_CAP, drm_setclientcap, 0),
58 DRM_IOCTL_DEF(DRM_IOCTL_SET_VERSION, drm_setversion, DRM_MASTER),
59
60 DRM_IOCTL_DEF(DRM_IOCTL_SET_UNIQUE, drm_setunique, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
61 DRM_IOCTL_DEF(DRM_IOCTL_BLOCK, drm_noop, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
62 DRM_IOCTL_DEF(DRM_IOCTL_UNBLOCK, drm_noop, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
63 DRM_IOCTL_DEF(DRM_IOCTL_AUTH_MAGIC, drm_authmagic, DRM_AUTH|DRM_MASTER),
64
65 DRM_IOCTL_DEF(DRM_IOCTL_ADD_MAP, drm_addmap_ioctl, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
66 DRM_IOCTL_DEF(DRM_IOCTL_RM_MAP, drm_rmmap_ioctl, DRM_AUTH),
67
David Herrmanne7b960702014-07-24 12:10:04 +020068 DRM_IOCTL_DEF(DRM_IOCTL_SET_SAREA_CTX, drm_legacy_setsareactx, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
69 DRM_IOCTL_DEF(DRM_IOCTL_GET_SAREA_CTX, drm_legacy_getsareactx, DRM_AUTH),
David Herrmannec8f1122014-07-23 14:14:53 +020070
71 DRM_IOCTL_DEF(DRM_IOCTL_SET_MASTER, drm_setmaster_ioctl, DRM_ROOT_ONLY),
72 DRM_IOCTL_DEF(DRM_IOCTL_DROP_MASTER, drm_dropmaster_ioctl, DRM_ROOT_ONLY),
73
David Herrmanne7b960702014-07-24 12:10:04 +020074 DRM_IOCTL_DEF(DRM_IOCTL_ADD_CTX, drm_legacy_addctx, DRM_AUTH|DRM_ROOT_ONLY),
75 DRM_IOCTL_DEF(DRM_IOCTL_RM_CTX, drm_legacy_rmctx, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
David Herrmannec8f1122014-07-23 14:14:53 +020076 DRM_IOCTL_DEF(DRM_IOCTL_MOD_CTX, drm_noop, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
David Herrmanne7b960702014-07-24 12:10:04 +020077 DRM_IOCTL_DEF(DRM_IOCTL_GET_CTX, drm_legacy_getctx, DRM_AUTH),
78 DRM_IOCTL_DEF(DRM_IOCTL_SWITCH_CTX, drm_legacy_switchctx, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
79 DRM_IOCTL_DEF(DRM_IOCTL_NEW_CTX, drm_legacy_newctx, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
80 DRM_IOCTL_DEF(DRM_IOCTL_RES_CTX, drm_legacy_resctx, DRM_AUTH),
David Herrmannec8f1122014-07-23 14:14:53 +020081
82 DRM_IOCTL_DEF(DRM_IOCTL_ADD_DRAW, drm_noop, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
83 DRM_IOCTL_DEF(DRM_IOCTL_RM_DRAW, drm_noop, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
84
85 DRM_IOCTL_DEF(DRM_IOCTL_LOCK, drm_lock, DRM_AUTH),
86 DRM_IOCTL_DEF(DRM_IOCTL_UNLOCK, drm_unlock, DRM_AUTH),
87
88 DRM_IOCTL_DEF(DRM_IOCTL_FINISH, drm_noop, DRM_AUTH),
89
90 DRM_IOCTL_DEF(DRM_IOCTL_ADD_BUFS, drm_addbufs, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
91 DRM_IOCTL_DEF(DRM_IOCTL_MARK_BUFS, drm_markbufs, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
92 DRM_IOCTL_DEF(DRM_IOCTL_INFO_BUFS, drm_infobufs, DRM_AUTH),
93 DRM_IOCTL_DEF(DRM_IOCTL_MAP_BUFS, drm_mapbufs, DRM_AUTH),
94 DRM_IOCTL_DEF(DRM_IOCTL_FREE_BUFS, drm_freebufs, DRM_AUTH),
95 DRM_IOCTL_DEF(DRM_IOCTL_DMA, drm_dma_ioctl, DRM_AUTH),
96
97 DRM_IOCTL_DEF(DRM_IOCTL_CONTROL, drm_control, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
98
99#if __OS_HAS_AGP
100 DRM_IOCTL_DEF(DRM_IOCTL_AGP_ACQUIRE, drm_agp_acquire_ioctl, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
101 DRM_IOCTL_DEF(DRM_IOCTL_AGP_RELEASE, drm_agp_release_ioctl, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
102 DRM_IOCTL_DEF(DRM_IOCTL_AGP_ENABLE, drm_agp_enable_ioctl, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
103 DRM_IOCTL_DEF(DRM_IOCTL_AGP_INFO, drm_agp_info_ioctl, DRM_AUTH),
104 DRM_IOCTL_DEF(DRM_IOCTL_AGP_ALLOC, drm_agp_alloc_ioctl, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
105 DRM_IOCTL_DEF(DRM_IOCTL_AGP_FREE, drm_agp_free_ioctl, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
106 DRM_IOCTL_DEF(DRM_IOCTL_AGP_BIND, drm_agp_bind_ioctl, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
107 DRM_IOCTL_DEF(DRM_IOCTL_AGP_UNBIND, drm_agp_unbind_ioctl, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
108#endif
109
110 DRM_IOCTL_DEF(DRM_IOCTL_SG_ALLOC, drm_sg_alloc, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
111 DRM_IOCTL_DEF(DRM_IOCTL_SG_FREE, drm_sg_free, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
112
113 DRM_IOCTL_DEF(DRM_IOCTL_WAIT_VBLANK, drm_wait_vblank, DRM_UNLOCKED),
114
115 DRM_IOCTL_DEF(DRM_IOCTL_MODESET_CTL, drm_modeset_ctl, 0),
116
117 DRM_IOCTL_DEF(DRM_IOCTL_UPDATE_DRAW, drm_noop, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
118
119 DRM_IOCTL_DEF(DRM_IOCTL_GEM_CLOSE, drm_gem_close_ioctl, DRM_UNLOCKED|DRM_RENDER_ALLOW),
120 DRM_IOCTL_DEF(DRM_IOCTL_GEM_FLINK, drm_gem_flink_ioctl, DRM_AUTH|DRM_UNLOCKED),
121 DRM_IOCTL_DEF(DRM_IOCTL_GEM_OPEN, drm_gem_open_ioctl, DRM_AUTH|DRM_UNLOCKED),
122
123 DRM_IOCTL_DEF(DRM_IOCTL_MODE_GETRESOURCES, drm_mode_getresources, DRM_CONTROL_ALLOW|DRM_UNLOCKED),
124
125 DRM_IOCTL_DEF(DRM_IOCTL_PRIME_HANDLE_TO_FD, drm_prime_handle_to_fd_ioctl, DRM_AUTH|DRM_UNLOCKED|DRM_RENDER_ALLOW),
126 DRM_IOCTL_DEF(DRM_IOCTL_PRIME_FD_TO_HANDLE, drm_prime_fd_to_handle_ioctl, DRM_AUTH|DRM_UNLOCKED|DRM_RENDER_ALLOW),
127
128 DRM_IOCTL_DEF(DRM_IOCTL_MODE_GETPLANERESOURCES, drm_mode_getplane_res, DRM_CONTROL_ALLOW|DRM_UNLOCKED),
129 DRM_IOCTL_DEF(DRM_IOCTL_MODE_GETCRTC, drm_mode_getcrtc, DRM_CONTROL_ALLOW|DRM_UNLOCKED),
130 DRM_IOCTL_DEF(DRM_IOCTL_MODE_SETCRTC, drm_mode_setcrtc, DRM_MASTER|DRM_CONTROL_ALLOW|DRM_UNLOCKED),
131 DRM_IOCTL_DEF(DRM_IOCTL_MODE_GETPLANE, drm_mode_getplane, DRM_CONTROL_ALLOW|DRM_UNLOCKED),
132 DRM_IOCTL_DEF(DRM_IOCTL_MODE_SETPLANE, drm_mode_setplane, DRM_MASTER|DRM_CONTROL_ALLOW|DRM_UNLOCKED),
133 DRM_IOCTL_DEF(DRM_IOCTL_MODE_CURSOR, drm_mode_cursor_ioctl, DRM_MASTER|DRM_CONTROL_ALLOW|DRM_UNLOCKED),
134 DRM_IOCTL_DEF(DRM_IOCTL_MODE_GETGAMMA, drm_mode_gamma_get_ioctl, DRM_UNLOCKED),
135 DRM_IOCTL_DEF(DRM_IOCTL_MODE_SETGAMMA, drm_mode_gamma_set_ioctl, DRM_MASTER|DRM_UNLOCKED),
136 DRM_IOCTL_DEF(DRM_IOCTL_MODE_GETENCODER, drm_mode_getencoder, DRM_CONTROL_ALLOW|DRM_UNLOCKED),
137 DRM_IOCTL_DEF(DRM_IOCTL_MODE_GETCONNECTOR, drm_mode_getconnector, DRM_CONTROL_ALLOW|DRM_UNLOCKED),
138 DRM_IOCTL_DEF(DRM_IOCTL_MODE_ATTACHMODE, drm_noop, DRM_MASTER|DRM_CONTROL_ALLOW|DRM_UNLOCKED),
139 DRM_IOCTL_DEF(DRM_IOCTL_MODE_DETACHMODE, drm_noop, DRM_MASTER|DRM_CONTROL_ALLOW|DRM_UNLOCKED),
140 DRM_IOCTL_DEF(DRM_IOCTL_MODE_GETPROPERTY, drm_mode_getproperty_ioctl, DRM_CONTROL_ALLOW|DRM_UNLOCKED),
141 DRM_IOCTL_DEF(DRM_IOCTL_MODE_SETPROPERTY, drm_mode_connector_property_set_ioctl, DRM_MASTER|DRM_CONTROL_ALLOW|DRM_UNLOCKED),
142 DRM_IOCTL_DEF(DRM_IOCTL_MODE_GETPROPBLOB, drm_mode_getblob_ioctl, DRM_CONTROL_ALLOW|DRM_UNLOCKED),
143 DRM_IOCTL_DEF(DRM_IOCTL_MODE_GETFB, drm_mode_getfb, DRM_CONTROL_ALLOW|DRM_UNLOCKED),
144 DRM_IOCTL_DEF(DRM_IOCTL_MODE_ADDFB, drm_mode_addfb, DRM_CONTROL_ALLOW|DRM_UNLOCKED),
145 DRM_IOCTL_DEF(DRM_IOCTL_MODE_ADDFB2, drm_mode_addfb2, DRM_CONTROL_ALLOW|DRM_UNLOCKED),
146 DRM_IOCTL_DEF(DRM_IOCTL_MODE_RMFB, drm_mode_rmfb, DRM_CONTROL_ALLOW|DRM_UNLOCKED),
147 DRM_IOCTL_DEF(DRM_IOCTL_MODE_PAGE_FLIP, drm_mode_page_flip_ioctl, DRM_MASTER|DRM_CONTROL_ALLOW|DRM_UNLOCKED),
148 DRM_IOCTL_DEF(DRM_IOCTL_MODE_DIRTYFB, drm_mode_dirtyfb_ioctl, DRM_MASTER|DRM_CONTROL_ALLOW|DRM_UNLOCKED),
149 DRM_IOCTL_DEF(DRM_IOCTL_MODE_CREATE_DUMB, drm_mode_create_dumb_ioctl, DRM_CONTROL_ALLOW|DRM_UNLOCKED),
150 DRM_IOCTL_DEF(DRM_IOCTL_MODE_MAP_DUMB, drm_mode_mmap_dumb_ioctl, DRM_CONTROL_ALLOW|DRM_UNLOCKED),
151 DRM_IOCTL_DEF(DRM_IOCTL_MODE_DESTROY_DUMB, drm_mode_destroy_dumb_ioctl, DRM_CONTROL_ALLOW|DRM_UNLOCKED),
152 DRM_IOCTL_DEF(DRM_IOCTL_MODE_OBJ_GETPROPERTIES, drm_mode_obj_get_properties_ioctl, DRM_CONTROL_ALLOW|DRM_UNLOCKED),
153 DRM_IOCTL_DEF(DRM_IOCTL_MODE_OBJ_SETPROPERTY, drm_mode_obj_set_property_ioctl, DRM_MASTER|DRM_CONTROL_ALLOW|DRM_UNLOCKED),
154 DRM_IOCTL_DEF(DRM_IOCTL_MODE_CURSOR2, drm_mode_cursor2_ioctl, DRM_MASTER|DRM_CONTROL_ALLOW|DRM_UNLOCKED),
155};
156
157#define DRM_CORE_IOCTL_COUNT ARRAY_SIZE( drm_ioctls )
158
Linus Torvalds1da177e2005-04-16 15:20:36 -0700159/**
160 * Get the bus id.
Dave Airlieb5e89ed2005-09-25 14:28:13 +1000161 *
Linus Torvalds1da177e2005-04-16 15:20:36 -0700162 * \param inode device inode.
Eric Anholt6c340ea2007-08-25 20:23:09 +1000163 * \param file_priv DRM file private.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700164 * \param cmd command.
165 * \param arg user argument, pointing to a drm_unique structure.
166 * \return zero on success or a negative number on failure.
167 *
168 * Copies the bus id from drm_device::unique into user space.
169 */
Eric Anholtc153f452007-09-03 12:06:45 +1000170int drm_getunique(struct drm_device *dev, void *data,
171 struct drm_file *file_priv)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700172{
Eric Anholtc153f452007-09-03 12:06:45 +1000173 struct drm_unique *u = data;
Dave Airlie7c1c2872008-11-28 14:22:24 +1000174 struct drm_master *master = file_priv->master;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700175
Dave Airlie7c1c2872008-11-28 14:22:24 +1000176 if (u->unique_len >= master->unique_len) {
177 if (copy_to_user(u->unique, master->unique, master->unique_len))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700178 return -EFAULT;
179 }
Dave Airlie7c1c2872008-11-28 14:22:24 +1000180 u->unique_len = master->unique_len;
Eric Anholtc153f452007-09-03 12:06:45 +1000181
Linus Torvalds1da177e2005-04-16 15:20:36 -0700182 return 0;
183}
184
Chris Wilson3fb688f2010-08-04 11:09:42 +0100185static void
186drm_unset_busid(struct drm_device *dev,
187 struct drm_master *master)
188{
Chris Wilson3fb688f2010-08-04 11:09:42 +0100189 kfree(master->unique);
190 master->unique = NULL;
191 master->unique_len = 0;
192 master->unique_size = 0;
193}
194
Linus Torvalds1da177e2005-04-16 15:20:36 -0700195/**
196 * Set the bus id.
Dave Airlieb5e89ed2005-09-25 14:28:13 +1000197 *
Linus Torvalds1da177e2005-04-16 15:20:36 -0700198 * \param inode device inode.
Eric Anholt6c340ea2007-08-25 20:23:09 +1000199 * \param file_priv DRM file private.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700200 * \param cmd command.
201 * \param arg user argument, pointing to a drm_unique structure.
202 * \return zero on success or a negative number on failure.
203 *
204 * Copies the bus id from userspace into drm_device::unique, and verifies that
205 * it matches the device this DRM is attached to (EINVAL otherwise). Deprecated
206 * in interface version 1.1 and will return EBUSY when setversion has requested
Daniel Vetter53bf2a22013-11-03 21:47:18 +0100207 * version 1.1 or greater. Also note that KMS is all version 1.1 and later and
208 * UMS was only ever supported on pci devices.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700209 */
Eric Anholtc153f452007-09-03 12:06:45 +1000210int drm_setunique(struct drm_device *dev, void *data,
211 struct drm_file *file_priv)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700212{
Eric Anholtc153f452007-09-03 12:06:45 +1000213 struct drm_unique *u = data;
Dave Airlie7c1c2872008-11-28 14:22:24 +1000214 struct drm_master *master = file_priv->master;
Dave Airlie8410ea32010-12-15 03:16:38 +1000215 int ret;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700216
Dave Airlie7c1c2872008-11-28 14:22:24 +1000217 if (master->unique_len || master->unique)
Dave Airlieb5e89ed2005-09-25 14:28:13 +1000218 return -EBUSY;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700219
Eric Anholtc153f452007-09-03 12:06:45 +1000220 if (!u->unique_len || u->unique_len > 1024)
Dave Airlieb5e89ed2005-09-25 14:28:13 +1000221 return -EINVAL;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700222
Daniel Vetter53bf2a22013-11-03 21:47:18 +0100223 if (drm_core_check_feature(dev, DRIVER_MODESET))
224 return 0;
225
226 if (WARN_ON(!dev->pdev))
Dave Airlie8410ea32010-12-15 03:16:38 +1000227 return -EINVAL;
228
Daniel Vetter53bf2a22013-11-03 21:47:18 +0100229 ret = drm_pci_set_unique(dev, master, u);
Dave Airlie8410ea32010-12-15 03:16:38 +1000230 if (ret)
Chris Wilson3fb688f2010-08-04 11:09:42 +0100231 goto err;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700232
233 return 0;
Chris Wilson3fb688f2010-08-04 11:09:42 +0100234
235err:
236 drm_unset_busid(dev, master);
237 return ret;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700238}
239
Dave Airlie7c1c2872008-11-28 14:22:24 +1000240static int drm_set_busid(struct drm_device *dev, struct drm_file *file_priv)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700241{
Dave Airlie7c1c2872008-11-28 14:22:24 +1000242 struct drm_master *master = file_priv->master;
Dave Airlie8410ea32010-12-15 03:16:38 +1000243 int ret;
Chris Wilson3fb688f2010-08-04 11:09:42 +0100244
245 if (master->unique != NULL)
246 drm_unset_busid(dev, master);
Dave Airliefe347652006-01-02 21:19:39 +1100247
Thierry Redingca8e2ad2014-04-11 15:23:00 +0200248 if (dev->driver->bus && dev->driver->bus->set_busid) {
249 ret = dev->driver->bus->set_busid(dev, master);
250 if (ret) {
251 drm_unset_busid(dev, master);
252 return ret;
253 }
254 } else {
255 if (WARN(dev->unique == NULL,
256 "No drm_bus.set_busid() implementation provided by "
257 "%ps. Use drm_dev_set_unique() to set the unique "
258 "name explicitly.", dev->driver))
259 return -EINVAL;
260
261 master->unique = kstrdup(dev->unique, GFP_KERNEL);
262 if (master->unique)
263 master->unique_len = strlen(dev->unique);
264 }
265
Linus Torvalds1da177e2005-04-16 15:20:36 -0700266 return 0;
267}
268
Linus Torvalds1da177e2005-04-16 15:20:36 -0700269/**
270 * Get a mapping information.
271 *
272 * \param inode device inode.
Eric Anholt6c340ea2007-08-25 20:23:09 +1000273 * \param file_priv DRM file private.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700274 * \param cmd command.
275 * \param arg user argument, pointing to a drm_map structure.
Dave Airlieb5e89ed2005-09-25 14:28:13 +1000276 *
Linus Torvalds1da177e2005-04-16 15:20:36 -0700277 * \return zero on success or a negative number on failure.
278 *
279 * Searches for the mapping with the specified offset and copies its information
280 * into userspace
281 */
Eric Anholtc153f452007-09-03 12:06:45 +1000282int drm_getmap(struct drm_device *dev, void *data,
283 struct drm_file *file_priv)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700284{
Eric Anholtc153f452007-09-03 12:06:45 +1000285 struct drm_map *map = data;
Dave Airlie55910512007-07-11 16:53:40 +1000286 struct drm_map_list *r_list = NULL;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700287 struct list_head *list;
Dave Airlieb5e89ed2005-09-25 14:28:13 +1000288 int idx;
289 int i;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700290
Eric Anholtc153f452007-09-03 12:06:45 +1000291 idx = map->offset;
Ilija Hadzic09b4ea42011-10-28 17:43:28 -0400292 if (idx < 0)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700293 return -EINVAL;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700294
295 i = 0;
Ilija Hadzic09b4ea42011-10-28 17:43:28 -0400296 mutex_lock(&dev->struct_mutex);
Dave Airliebd1b3312007-05-26 05:01:51 +1000297 list_for_each(list, &dev->maplist) {
Dave Airlieb5e89ed2005-09-25 14:28:13 +1000298 if (i == idx) {
Dave Airlie55910512007-07-11 16:53:40 +1000299 r_list = list_entry(list, struct drm_map_list, head);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700300 break;
301 }
302 i++;
303 }
Dave Airlieb5e89ed2005-09-25 14:28:13 +1000304 if (!r_list || !r_list->map) {
Dave Airlie30e2fb12006-02-02 19:37:46 +1100305 mutex_unlock(&dev->struct_mutex);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700306 return -EINVAL;
307 }
308
Eric Anholtc153f452007-09-03 12:06:45 +1000309 map->offset = r_list->map->offset;
310 map->size = r_list->map->size;
311 map->type = r_list->map->type;
312 map->flags = r_list->map->flags;
313 map->handle = (void *)(unsigned long) r_list->user_token;
Andy Lutomirski0dd99f12013-05-13 23:58:48 +0000314
315#ifdef CONFIG_X86
316 /*
317 * There appears to be exactly one user of the mtrr index: dritest.
318 * It's easy enough to keep it working on non-PAT systems.
319 */
320 map->mtrr = phys_wc_to_mtrr_index(r_list->map->mtrr);
321#else
322 map->mtrr = -1;
323#endif
324
Dave Airlie30e2fb12006-02-02 19:37:46 +1100325 mutex_unlock(&dev->struct_mutex);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700326
Linus Torvalds1da177e2005-04-16 15:20:36 -0700327 return 0;
328}
329
330/**
331 * Get client information.
332 *
333 * \param inode device inode.
Eric Anholt6c340ea2007-08-25 20:23:09 +1000334 * \param file_priv DRM file private.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700335 * \param cmd command.
336 * \param arg user argument, pointing to a drm_client structure.
Dave Airlieb5e89ed2005-09-25 14:28:13 +1000337 *
Linus Torvalds1da177e2005-04-16 15:20:36 -0700338 * \return zero on success or a negative number on failure.
339 *
340 * Searches for the client with the specified index and copies its information
341 * into userspace
342 */
Eric Anholtc153f452007-09-03 12:06:45 +1000343int drm_getclient(struct drm_device *dev, void *data,
344 struct drm_file *file_priv)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700345{
Eric Anholtc153f452007-09-03 12:06:45 +1000346 struct drm_client *client = data;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700347
Daniel Vetter719524d2013-08-08 15:41:31 +0200348 /*
349 * Hollowed-out getclient ioctl to keep some dead old drm tests/tools
350 * not breaking completely. Userspace tools stop enumerating one they
351 * get -EINVAL, hence this is the return value we need to hand back for
352 * no clients tracked.
353 *
354 * Unfortunately some clients (*cough* libva *cough*) use this in a fun
355 * attempt to figure out whether they're authenticated or not. Since
356 * that's the only thing they care about, give it to the directly
357 * instead of walking one giant list.
358 */
359 if (client->idx == 0) {
360 client->auth = file_priv->authenticated;
361 client->pid = pid_vnr(file_priv->pid);
362 client->uid = from_kuid_munged(current_user_ns(),
363 file_priv->uid);
364 client->magic = 0;
365 client->iocs = 0;
Ilija Hadzic09b4ea42011-10-28 17:43:28 -0400366
Daniel Vetter719524d2013-08-08 15:41:31 +0200367 return 0;
368 } else {
369 return -EINVAL;
Eric Anholtb018fcd2007-11-22 18:46:54 +1000370 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700371}
372
Dave Airlieb5e89ed2005-09-25 14:28:13 +1000373/**
374 * Get statistics information.
375 *
Linus Torvalds1da177e2005-04-16 15:20:36 -0700376 * \param inode device inode.
Eric Anholt6c340ea2007-08-25 20:23:09 +1000377 * \param file_priv DRM file private.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700378 * \param cmd command.
379 * \param arg user argument, pointing to a drm_stats structure.
Dave Airlieb5e89ed2005-09-25 14:28:13 +1000380 *
Linus Torvalds1da177e2005-04-16 15:20:36 -0700381 * \return zero on success or a negative number on failure.
382 */
Eric Anholtc153f452007-09-03 12:06:45 +1000383int drm_getstats(struct drm_device *dev, void *data,
384 struct drm_file *file_priv)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700385{
Eric Anholtc153f452007-09-03 12:06:45 +1000386 struct drm_stats *stats = data;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700387
Daniel Vetterd79cdc82013-08-08 15:41:32 +0200388 /* Clear stats to prevent userspace from eating its stack garbage. */
Li Zefan246a3d12007-11-05 12:53:09 +1000389 memset(stats, 0, sizeof(*stats));
Dave Airlieb5e89ed2005-09-25 14:28:13 +1000390
Linus Torvalds1da177e2005-04-16 15:20:36 -0700391 return 0;
392}
393
394/**
Ben Skeggs9f354212011-02-21 11:17:35 +1000395 * Get device/driver capabilities
396 */
397int drm_getcap(struct drm_device *dev, void *data, struct drm_file *file_priv)
398{
399 struct drm_get_cap *req = data;
400
401 req->value = 0;
Dave Airliee73f88a2011-03-04 14:50:28 +1000402 switch (req->capability) {
403 case DRM_CAP_DUMB_BUFFER:
404 if (dev->driver->dumb_create)
405 req->value = 1;
406 break;
Dave Airlie51eab412011-03-24 20:54:35 +1000407 case DRM_CAP_VBLANK_HIGH_CRTC:
Ilija Hadzic19b01b52011-03-18 16:58:04 -0500408 req->value = 1;
409 break;
Dave Airlie019d96c2011-09-29 16:20:42 +0100410 case DRM_CAP_DUMB_PREFERRED_DEPTH:
411 req->value = dev->mode_config.preferred_depth;
412 break;
413 case DRM_CAP_DUMB_PREFER_SHADOW:
414 req->value = dev->mode_config.prefer_shadow;
415 break;
Dave Airlie4271a402012-04-02 14:11:50 +0100416 case DRM_CAP_PRIME:
417 req->value |= dev->driver->prime_fd_to_handle ? DRM_PRIME_CAP_IMPORT : 0;
418 req->value |= dev->driver->prime_handle_to_fd ? DRM_PRIME_CAP_EXPORT : 0;
419 break;
Imre Deakc61eef72012-10-23 18:53:26 +0000420 case DRM_CAP_TIMESTAMP_MONOTONIC:
421 req->value = drm_timestamp_monotonic;
422 break;
Keith Packard62f21042013-07-22 18:50:00 -0700423 case DRM_CAP_ASYNC_PAGE_FLIP:
424 req->value = dev->mode_config.async_page_flip;
425 break;
Alex Deucher8716ed42014-02-12 12:48:23 -0500426 case DRM_CAP_CURSOR_WIDTH:
427 if (dev->mode_config.cursor_width)
428 req->value = dev->mode_config.cursor_width;
429 else
430 req->value = 64;
431 break;
432 case DRM_CAP_CURSOR_HEIGHT:
433 if (dev->mode_config.cursor_height)
434 req->value = dev->mode_config.cursor_height;
435 else
436 req->value = 64;
437 break;
Dave Airliee73f88a2011-03-04 14:50:28 +1000438 default:
439 return -EINVAL;
440 }
Ben Skeggs9f354212011-02-21 11:17:35 +1000441 return 0;
442}
443
444/**
Damien Lespiau1c0814f2013-09-25 16:45:20 +0100445 * Set device/driver capabilities
446 */
447int
448drm_setclientcap(struct drm_device *dev, void *data, struct drm_file *file_priv)
449{
Damien Lespiau61d8e322013-09-25 16:45:22 +0100450 struct drm_set_client_cap *req = data;
451
452 switch (req->capability) {
453 case DRM_CLIENT_CAP_STEREO_3D:
454 if (req->value > 1)
455 return -EINVAL;
456 file_priv->stereo_allowed = req->value;
457 break;
Matt Roper681e7ec2014-04-01 15:22:42 -0700458 case DRM_CLIENT_CAP_UNIVERSAL_PLANES:
Matt Roper681e7ec2014-04-01 15:22:42 -0700459 if (req->value > 1)
460 return -EINVAL;
461 file_priv->universal_planes = req->value;
462 break;
Damien Lespiau61d8e322013-09-25 16:45:22 +0100463 default:
464 return -EINVAL;
465 }
466
467 return 0;
Damien Lespiau1c0814f2013-09-25 16:45:20 +0100468}
469
470/**
Linus Torvalds1da177e2005-04-16 15:20:36 -0700471 * Setversion ioctl.
472 *
473 * \param inode device inode.
Eric Anholt6c340ea2007-08-25 20:23:09 +1000474 * \param file_priv DRM file private.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700475 * \param cmd command.
476 * \param arg user argument, pointing to a drm_lock structure.
477 * \return zero on success or negative number on failure.
478 *
479 * Sets the requested interface version
480 */
Eric Anholtc153f452007-09-03 12:06:45 +1000481int drm_setversion(struct drm_device *dev, void *data, struct drm_file *file_priv)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700482{
Eric Anholtc153f452007-09-03 12:06:45 +1000483 struct drm_set_version *sv = data;
484 int if_version, retcode = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700485
Eric Anholtc153f452007-09-03 12:06:45 +1000486 if (sv->drm_di_major != -1) {
487 if (sv->drm_di_major != DRM_IF_MAJOR ||
488 sv->drm_di_minor < 0 || sv->drm_di_minor > DRM_IF_MINOR) {
489 retcode = -EINVAL;
490 goto done;
491 }
492 if_version = DRM_IF_VERSION(sv->drm_di_major,
493 sv->drm_di_minor);
Dave Airlie3d774612006-08-07 20:07:43 +1000494 dev->if_version = max(if_version, dev->if_version);
Eric Anholtc153f452007-09-03 12:06:45 +1000495 if (sv->drm_di_minor >= 1) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700496 /*
497 * Version 1.1 includes tying of DRM to specific device
Benjamin Herrenschmidtc17c2f82010-08-06 13:55:10 +1000498 * Version 1.4 has proper PCI domain support
Linus Torvalds1da177e2005-04-16 15:20:36 -0700499 */
Chris Wilson3fb688f2010-08-04 11:09:42 +0100500 retcode = drm_set_busid(dev, file_priv);
501 if (retcode)
502 goto done;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700503 }
504 }
505
Eric Anholtc153f452007-09-03 12:06:45 +1000506 if (sv->drm_dd_major != -1) {
507 if (sv->drm_dd_major != dev->driver->major ||
508 sv->drm_dd_minor < 0 || sv->drm_dd_minor >
509 dev->driver->minor) {
510 retcode = -EINVAL;
511 goto done;
512 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700513 }
Eric Anholtc153f452007-09-03 12:06:45 +1000514
515done:
516 sv->drm_di_major = DRM_IF_MAJOR;
517 sv->drm_di_minor = DRM_IF_MINOR;
518 sv->drm_dd_major = dev->driver->major;
519 sv->drm_dd_minor = dev->driver->minor;
520
521 return retcode;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700522}
523
524/** No-op ioctl. */
Eric Anholtc153f452007-09-03 12:06:45 +1000525int drm_noop(struct drm_device *dev, void *data,
526 struct drm_file *file_priv)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700527{
528 DRM_DEBUG("\n");
529 return 0;
530}
Daniel Vetterb2c606f2012-01-17 12:50:12 +0100531EXPORT_SYMBOL(drm_noop);
David Herrmannec8f1122014-07-23 14:14:53 +0200532
533/**
534 * Copy and IOCTL return string to user space
535 */
536static int drm_copy_field(char __user *buf, size_t *buf_len, const char *value)
537{
538 int len;
539
540 /* don't overflow userbuf */
541 len = strlen(value);
542 if (len > *buf_len)
543 len = *buf_len;
544
545 /* let userspace know exact length of driver value (which could be
546 * larger than the userspace-supplied buffer) */
547 *buf_len = strlen(value);
548
549 /* finally, try filling in the userbuf */
550 if (len && buf)
551 if (copy_to_user(buf, value, len))
552 return -EFAULT;
553 return 0;
554}
555
556/**
557 * Get version information
558 *
559 * \param inode device inode.
560 * \param filp file pointer.
561 * \param cmd command.
562 * \param arg user argument, pointing to a drm_version structure.
563 * \return zero on success or negative number on failure.
564 *
565 * Fills in the version information in \p arg.
566 */
567static int drm_version(struct drm_device *dev, void *data,
568 struct drm_file *file_priv)
569{
570 struct drm_version *version = data;
571 int err;
572
573 version->version_major = dev->driver->major;
574 version->version_minor = dev->driver->minor;
575 version->version_patchlevel = dev->driver->patchlevel;
576 err = drm_copy_field(version->name, &version->name_len,
577 dev->driver->name);
578 if (!err)
579 err = drm_copy_field(version->date, &version->date_len,
580 dev->driver->date);
581 if (!err)
582 err = drm_copy_field(version->desc, &version->desc_len,
583 dev->driver->desc);
584
585 return err;
586}
587
588/**
589 * drm_ioctl_permit - Check ioctl permissions against caller
590 *
591 * @flags: ioctl permission flags.
592 * @file_priv: Pointer to struct drm_file identifying the caller.
593 *
594 * Checks whether the caller is allowed to run an ioctl with the
595 * indicated permissions. If so, returns zero. Otherwise returns an
596 * error code suitable for ioctl return.
597 */
598static int drm_ioctl_permit(u32 flags, struct drm_file *file_priv)
599{
600 /* ROOT_ONLY is only for CAP_SYS_ADMIN */
601 if (unlikely((flags & DRM_ROOT_ONLY) && !capable(CAP_SYS_ADMIN)))
602 return -EACCES;
603
604 /* AUTH is only for authenticated or render client */
605 if (unlikely((flags & DRM_AUTH) && !drm_is_render_client(file_priv) &&
606 !file_priv->authenticated))
607 return -EACCES;
608
609 /* MASTER is only for master or control clients */
Dave Airlie7963e9d2014-08-08 07:30:53 +1000610 if (unlikely((flags & DRM_MASTER) && !file_priv->is_master &&
David Herrmannec8f1122014-07-23 14:14:53 +0200611 !drm_is_control_client(file_priv)))
612 return -EACCES;
613
614 /* Control clients must be explicitly allowed */
615 if (unlikely(!(flags & DRM_CONTROL_ALLOW) &&
616 drm_is_control_client(file_priv)))
617 return -EACCES;
618
619 /* Render clients must be explicitly allowed */
620 if (unlikely(!(flags & DRM_RENDER_ALLOW) &&
621 drm_is_render_client(file_priv)))
622 return -EACCES;
623
624 return 0;
625}
626
627/**
628 * Called whenever a process performs an ioctl on /dev/drm.
629 *
630 * \param inode device inode.
631 * \param file_priv DRM file private.
632 * \param cmd command.
633 * \param arg user argument.
634 * \return zero on success or negative number on failure.
635 *
636 * Looks up the ioctl function in the ::ioctls table, checking for root
637 * previleges if so required, and dispatches to the respective function.
638 */
639long drm_ioctl(struct file *filp,
640 unsigned int cmd, unsigned long arg)
641{
642 struct drm_file *file_priv = filp->private_data;
643 struct drm_device *dev;
644 const struct drm_ioctl_desc *ioctl = NULL;
645 drm_ioctl_t *func;
646 unsigned int nr = DRM_IOCTL_NR(cmd);
647 int retcode = -EINVAL;
648 char stack_kdata[128];
649 char *kdata = NULL;
650 unsigned int usize, asize;
651
652 dev = file_priv->minor->dev;
653
654 if (drm_device_is_unplugged(dev))
655 return -ENODEV;
656
657 if ((nr >= DRM_CORE_IOCTL_COUNT) &&
658 ((nr < DRM_COMMAND_BASE) || (nr >= DRM_COMMAND_END)))
659 goto err_i1;
660 if ((nr >= DRM_COMMAND_BASE) && (nr < DRM_COMMAND_END) &&
661 (nr < DRM_COMMAND_BASE + dev->driver->num_ioctls)) {
662 u32 drv_size;
663 ioctl = &dev->driver->ioctls[nr - DRM_COMMAND_BASE];
664 drv_size = _IOC_SIZE(ioctl->cmd_drv);
665 usize = asize = _IOC_SIZE(cmd);
666 if (drv_size > asize)
667 asize = drv_size;
668 cmd = ioctl->cmd_drv;
669 }
670 else if ((nr >= DRM_COMMAND_END) || (nr < DRM_COMMAND_BASE)) {
671 u32 drv_size;
672
673 ioctl = &drm_ioctls[nr];
674
675 drv_size = _IOC_SIZE(ioctl->cmd);
676 usize = asize = _IOC_SIZE(cmd);
677 if (drv_size > asize)
678 asize = drv_size;
679
680 cmd = ioctl->cmd;
681 } else
682 goto err_i1;
683
684 DRM_DEBUG("pid=%d, dev=0x%lx, auth=%d, %s\n",
685 task_pid_nr(current),
686 (long)old_encode_dev(file_priv->minor->kdev->devt),
687 file_priv->authenticated, ioctl->name);
688
689 /* Do not trust userspace, use our own definition */
690 func = ioctl->func;
691
692 if (unlikely(!func)) {
693 DRM_DEBUG("no function\n");
694 retcode = -EINVAL;
695 goto err_i1;
696 }
697
698 retcode = drm_ioctl_permit(ioctl->flags, file_priv);
699 if (unlikely(retcode))
700 goto err_i1;
701
702 if (cmd & (IOC_IN | IOC_OUT)) {
703 if (asize <= sizeof(stack_kdata)) {
704 kdata = stack_kdata;
705 } else {
706 kdata = kmalloc(asize, GFP_KERNEL);
707 if (!kdata) {
708 retcode = -ENOMEM;
709 goto err_i1;
710 }
711 }
712 if (asize > usize)
713 memset(kdata + usize, 0, asize - usize);
714 }
715
716 if (cmd & IOC_IN) {
717 if (copy_from_user(kdata, (void __user *)arg,
718 usize) != 0) {
719 retcode = -EFAULT;
720 goto err_i1;
721 }
722 } else if (cmd & IOC_OUT) {
723 memset(kdata, 0, usize);
724 }
725
726 if (ioctl->flags & DRM_UNLOCKED)
727 retcode = func(dev, kdata, file_priv);
728 else {
729 mutex_lock(&drm_global_mutex);
730 retcode = func(dev, kdata, file_priv);
731 mutex_unlock(&drm_global_mutex);
732 }
733
734 if (cmd & IOC_OUT) {
735 if (copy_to_user((void __user *)arg, kdata,
736 usize) != 0)
737 retcode = -EFAULT;
738 }
739
740 err_i1:
741 if (!ioctl)
742 DRM_DEBUG("invalid ioctl: pid=%d, dev=0x%lx, auth=%d, cmd=0x%02x, nr=0x%02x\n",
743 task_pid_nr(current),
744 (long)old_encode_dev(file_priv->minor->kdev->devt),
745 file_priv->authenticated, cmd, nr);
746
747 if (kdata != stack_kdata)
748 kfree(kdata);
749 if (retcode)
750 DRM_DEBUG("ret = %d\n", retcode);
751 return retcode;
752}
753EXPORT_SYMBOL(drm_ioctl);
754
755/**
756 * drm_ioctl_flags - Check for core ioctl and return ioctl permission flags
757 *
758 * @nr: Ioctl number.
759 * @flags: Where to return the ioctl permission flags
760 */
761bool drm_ioctl_flags(unsigned int nr, unsigned int *flags)
762{
763 if ((nr >= DRM_COMMAND_END && nr < DRM_CORE_IOCTL_COUNT) ||
764 (nr < DRM_COMMAND_BASE)) {
765 *flags = drm_ioctls[nr].flags;
766 return true;
767 }
768
769 return false;
770}
771EXPORT_SYMBOL(drm_ioctl_flags);