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authorDavid Herrmann <dh.herrmann@gmail.com>2014-07-23 08:14:53 -0400
committerDavid Herrmann <dh.herrmann@gmail.com>2014-08-05 10:08:11 -0400
commitec8f112db2ee0032f2b047109fdbd87f1c264ad8 (patch)
treec7579f0f70f89dd53e87400bd8a8ffc04abb337d
parent1b7199fe9840737397d335922033aa2c3cca92c6 (diff)
drm: merge drm_drv.c into drm_ioctl.c
All that is left in drm_drv.c is ioctl management. Merge it into drm_ioctl.c so we have all ioctl management in one file (and the name is much more fitting). Maybe we should now rename drm_stub.c to drm_drv.c again? Acked-by: Daniel Vetter <daniel.vetter@ffwll.ch> Reviewed-by: Alex Deucher <alexander.deucher@amd.com> Signed-off-by: David Herrmann <dh.herrmann@gmail.com>
Diffstat
-rw-r--r--drivers/gpu/drm/Makefile2
-rw-r--r--drivers/gpu/drm/drm_drv.c412
-rw-r--r--drivers/gpu/drm/drm_ioctl.c369
3 files changed, 362 insertions, 421 deletions
diff --git a/drivers/gpu/drm/Makefile b/drivers/gpu/drm/Makefile
index 60eb5d425df2..1f6f40cecf5c 100644
--- a/drivers/gpu/drm/Makefile
+++ b/drivers/gpu/drm/Makefile
@@ -6,7 +6,7 @@ ccflags-y := -Iinclude/drm
6 6
7drm-y := drm_auth.o drm_buffer.o drm_bufs.o drm_cache.o \ 7drm-y := drm_auth.o drm_buffer.o drm_bufs.o drm_cache.o \
8 drm_context.o drm_dma.o \ 8 drm_context.o drm_dma.o \
9 drm_drv.o drm_fops.o drm_gem.o drm_ioctl.o drm_irq.o \ 9 drm_fops.o drm_gem.o drm_ioctl.o drm_irq.o \
10 drm_lock.o drm_memory.o drm_stub.o drm_vm.o \ 10 drm_lock.o drm_memory.o drm_stub.o drm_vm.o \
11 drm_agpsupport.o drm_scatter.o drm_pci.o \ 11 drm_agpsupport.o drm_scatter.o drm_pci.o \
12 drm_platform.o drm_sysfs.o drm_hashtab.o drm_mm.o \ 12 drm_platform.o drm_sysfs.o drm_hashtab.o drm_mm.o \
diff --git a/drivers/gpu/drm/drm_drv.c b/drivers/gpu/drm/drm_drv.c
deleted file mode 100644
index 190df83be695..000000000000
--- a/drivers/gpu/drm/drm_drv.c
+++ /dev/null
@@ -1,412 +0,0 @@
1/**
2 * \file drm_drv.c
3 * Generic driver template
4 *
5 * \author Rickard E. (Rik) Faith <faith@valinux.com>
6 * \author Gareth Hughes <gareth@valinux.com>
7 *
8 * To use this template, you must at least define the following (samples
9 * given for the MGA driver):
10 *
11 * \code
12 * #define DRIVER_AUTHOR "VA Linux Systems, Inc."
13 *
14 * #define DRIVER_NAME "mga"
15 * #define DRIVER_DESC "Matrox G200/G400"
16 * #define DRIVER_DATE "20001127"
17 *
18 * #define drm_x mga_##x
19 * \endcode
20 */
21
22/*
23 * Created: Thu Nov 23 03:10:50 2000 by gareth@valinux.com
24 *
25 * Copyright 1999, 2000 Precision Insight, Inc., Cedar Park, Texas.
26 * Copyright 2000 VA Linux Systems, Inc., Sunnyvale, California.
27 * All Rights Reserved.
28 *
29 * Permission is hereby granted, free of charge, to any person obtaining a
30 * copy of this software and associated documentation files (the "Software"),
31 * to deal in the Software without restriction, including without limitation
32 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
33 * and/or sell copies of the Software, and to permit persons to whom the
34 * Software is furnished to do so, subject to the following conditions:
35 *
36 * The above copyright notice and this permission notice (including the next
37 * paragraph) shall be included in all copies or substantial portions of the
38 * Software.
39 *
40 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
41 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
42 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
43 * VA LINUX SYSTEMS AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM, DAMAGES OR
44 * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
45 * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
46 * OTHER DEALINGS IN THE SOFTWARE.
47 */
48
49#include <linux/debugfs.h>
50#include <linux/slab.h>
51#include <linux/export.h>
52#include <drm/drmP.h>
53#include <drm/drm_core.h>
54
55
56static int drm_version(struct drm_device *dev, void *data,
57 struct drm_file *file_priv);
58
59#define DRM_IOCTL_DEF(ioctl, _func, _flags) \
60 [DRM_IOCTL_NR(ioctl)] = {.cmd = ioctl, .func = _func, .flags = _flags, .cmd_drv = 0, .name = #ioctl}
61
62/** Ioctl table */
63static const struct drm_ioctl_desc drm_ioctls[] = {
64 DRM_IOCTL_DEF(DRM_IOCTL_VERSION, drm_version, DRM_UNLOCKED|DRM_RENDER_ALLOW),
65 DRM_IOCTL_DEF(DRM_IOCTL_GET_UNIQUE, drm_getunique, 0),
66 DRM_IOCTL_DEF(DRM_IOCTL_GET_MAGIC, drm_getmagic, 0),
67 DRM_IOCTL_DEF(DRM_IOCTL_IRQ_BUSID, drm_irq_by_busid, DRM_MASTER|DRM_ROOT_ONLY),
68 DRM_IOCTL_DEF(DRM_IOCTL_GET_MAP, drm_getmap, DRM_UNLOCKED),
69 DRM_IOCTL_DEF(DRM_IOCTL_GET_CLIENT, drm_getclient, DRM_UNLOCKED),
70 DRM_IOCTL_DEF(DRM_IOCTL_GET_STATS, drm_getstats, DRM_UNLOCKED),
71 DRM_IOCTL_DEF(DRM_IOCTL_GET_CAP, drm_getcap, DRM_UNLOCKED|DRM_RENDER_ALLOW),
72 DRM_IOCTL_DEF(DRM_IOCTL_SET_CLIENT_CAP, drm_setclientcap, 0),
73 DRM_IOCTL_DEF(DRM_IOCTL_SET_VERSION, drm_setversion, DRM_MASTER),
74
75 DRM_IOCTL_DEF(DRM_IOCTL_SET_UNIQUE, drm_setunique, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
76 DRM_IOCTL_DEF(DRM_IOCTL_BLOCK, drm_noop, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
77 DRM_IOCTL_DEF(DRM_IOCTL_UNBLOCK, drm_noop, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
78 DRM_IOCTL_DEF(DRM_IOCTL_AUTH_MAGIC, drm_authmagic, DRM_AUTH|DRM_MASTER),
79
80 DRM_IOCTL_DEF(DRM_IOCTL_ADD_MAP, drm_addmap_ioctl, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
81 DRM_IOCTL_DEF(DRM_IOCTL_RM_MAP, drm_rmmap_ioctl, DRM_AUTH),
82
83 DRM_IOCTL_DEF(DRM_IOCTL_SET_SAREA_CTX, drm_setsareactx, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
84 DRM_IOCTL_DEF(DRM_IOCTL_GET_SAREA_CTX, drm_getsareactx, DRM_AUTH),
85
86 DRM_IOCTL_DEF(DRM_IOCTL_SET_MASTER, drm_setmaster_ioctl, DRM_ROOT_ONLY),
87 DRM_IOCTL_DEF(DRM_IOCTL_DROP_MASTER, drm_dropmaster_ioctl, DRM_ROOT_ONLY),
88
89 DRM_IOCTL_DEF(DRM_IOCTL_ADD_CTX, drm_addctx, DRM_AUTH|DRM_ROOT_ONLY),
90 DRM_IOCTL_DEF(DRM_IOCTL_RM_CTX, drm_rmctx, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
91 DRM_IOCTL_DEF(DRM_IOCTL_MOD_CTX, drm_noop, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
92 DRM_IOCTL_DEF(DRM_IOCTL_GET_CTX, drm_getctx, DRM_AUTH),
93 DRM_IOCTL_DEF(DRM_IOCTL_SWITCH_CTX, drm_switchctx, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
94 DRM_IOCTL_DEF(DRM_IOCTL_NEW_CTX, drm_newctx, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
95 DRM_IOCTL_DEF(DRM_IOCTL_RES_CTX, drm_resctx, DRM_AUTH),
96
97 DRM_IOCTL_DEF(DRM_IOCTL_ADD_DRAW, drm_noop, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
98 DRM_IOCTL_DEF(DRM_IOCTL_RM_DRAW, drm_noop, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
99
100 DRM_IOCTL_DEF(DRM_IOCTL_LOCK, drm_lock, DRM_AUTH),
101 DRM_IOCTL_DEF(DRM_IOCTL_UNLOCK, drm_unlock, DRM_AUTH),
102
103 DRM_IOCTL_DEF(DRM_IOCTL_FINISH, drm_noop, DRM_AUTH),
104
105 DRM_IOCTL_DEF(DRM_IOCTL_ADD_BUFS, drm_addbufs, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
106 DRM_IOCTL_DEF(DRM_IOCTL_MARK_BUFS, drm_markbufs, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
107 DRM_IOCTL_DEF(DRM_IOCTL_INFO_BUFS, drm_infobufs, DRM_AUTH),
108 DRM_IOCTL_DEF(DRM_IOCTL_MAP_BUFS, drm_mapbufs, DRM_AUTH),
109 DRM_IOCTL_DEF(DRM_IOCTL_FREE_BUFS, drm_freebufs, DRM_AUTH),
110 DRM_IOCTL_DEF(DRM_IOCTL_DMA, drm_dma_ioctl, DRM_AUTH),
111
112 DRM_IOCTL_DEF(DRM_IOCTL_CONTROL, drm_control, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
113
114#if __OS_HAS_AGP
115 DRM_IOCTL_DEF(DRM_IOCTL_AGP_ACQUIRE, drm_agp_acquire_ioctl, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
116 DRM_IOCTL_DEF(DRM_IOCTL_AGP_RELEASE, drm_agp_release_ioctl, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
117 DRM_IOCTL_DEF(DRM_IOCTL_AGP_ENABLE, drm_agp_enable_ioctl, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
118 DRM_IOCTL_DEF(DRM_IOCTL_AGP_INFO, drm_agp_info_ioctl, DRM_AUTH),
119 DRM_IOCTL_DEF(DRM_IOCTL_AGP_ALLOC, drm_agp_alloc_ioctl, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
120 DRM_IOCTL_DEF(DRM_IOCTL_AGP_FREE, drm_agp_free_ioctl, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
121 DRM_IOCTL_DEF(DRM_IOCTL_AGP_BIND, drm_agp_bind_ioctl, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
122 DRM_IOCTL_DEF(DRM_IOCTL_AGP_UNBIND, drm_agp_unbind_ioctl, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
123#endif
124
125 DRM_IOCTL_DEF(DRM_IOCTL_SG_ALLOC, drm_sg_alloc, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
126 DRM_IOCTL_DEF(DRM_IOCTL_SG_FREE, drm_sg_free, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
127
128 DRM_IOCTL_DEF(DRM_IOCTL_WAIT_VBLANK, drm_wait_vblank, DRM_UNLOCKED),
129
130 DRM_IOCTL_DEF(DRM_IOCTL_MODESET_CTL, drm_modeset_ctl, 0),
131
132 DRM_IOCTL_DEF(DRM_IOCTL_UPDATE_DRAW, drm_noop, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
133
134 DRM_IOCTL_DEF(DRM_IOCTL_GEM_CLOSE, drm_gem_close_ioctl, DRM_UNLOCKED|DRM_RENDER_ALLOW),
135 DRM_IOCTL_DEF(DRM_IOCTL_GEM_FLINK, drm_gem_flink_ioctl, DRM_AUTH|DRM_UNLOCKED),
136 DRM_IOCTL_DEF(DRM_IOCTL_GEM_OPEN, drm_gem_open_ioctl, DRM_AUTH|DRM_UNLOCKED),
137
138 DRM_IOCTL_DEF(DRM_IOCTL_MODE_GETRESOURCES, drm_mode_getresources, DRM_CONTROL_ALLOW|DRM_UNLOCKED),
139
140 DRM_IOCTL_DEF(DRM_IOCTL_PRIME_HANDLE_TO_FD, drm_prime_handle_to_fd_ioctl, DRM_AUTH|DRM_UNLOCKED|DRM_RENDER_ALLOW),
141 DRM_IOCTL_DEF(DRM_IOCTL_PRIME_FD_TO_HANDLE, drm_prime_fd_to_handle_ioctl, DRM_AUTH|DRM_UNLOCKED|DRM_RENDER_ALLOW),
142
143 DRM_IOCTL_DEF(DRM_IOCTL_MODE_GETPLANERESOURCES, drm_mode_getplane_res, DRM_CONTROL_ALLOW|DRM_UNLOCKED),
144 DRM_IOCTL_DEF(DRM_IOCTL_MODE_GETCRTC, drm_mode_getcrtc, DRM_CONTROL_ALLOW|DRM_UNLOCKED),
145 DRM_IOCTL_DEF(DRM_IOCTL_MODE_SETCRTC, drm_mode_setcrtc, DRM_MASTER|DRM_CONTROL_ALLOW|DRM_UNLOCKED),
146 DRM_IOCTL_DEF(DRM_IOCTL_MODE_GETPLANE, drm_mode_getplane, DRM_CONTROL_ALLOW|DRM_UNLOCKED),
147 DRM_IOCTL_DEF(DRM_IOCTL_MODE_SETPLANE, drm_mode_setplane, DRM_MASTER|DRM_CONTROL_ALLOW|DRM_UNLOCKED),
148 DRM_IOCTL_DEF(DRM_IOCTL_MODE_CURSOR, drm_mode_cursor_ioctl, DRM_MASTER|DRM_CONTROL_ALLOW|DRM_UNLOCKED),
149 DRM_IOCTL_DEF(DRM_IOCTL_MODE_GETGAMMA, drm_mode_gamma_get_ioctl, DRM_UNLOCKED),
150 DRM_IOCTL_DEF(DRM_IOCTL_MODE_SETGAMMA, drm_mode_gamma_set_ioctl, DRM_MASTER|DRM_UNLOCKED),
151 DRM_IOCTL_DEF(DRM_IOCTL_MODE_GETENCODER, drm_mode_getencoder, DRM_CONTROL_ALLOW|DRM_UNLOCKED),
152 DRM_IOCTL_DEF(DRM_IOCTL_MODE_GETCONNECTOR, drm_mode_getconnector, DRM_CONTROL_ALLOW|DRM_UNLOCKED),
153 DRM_IOCTL_DEF(DRM_IOCTL_MODE_ATTACHMODE, drm_noop, DRM_MASTER|DRM_CONTROL_ALLOW|DRM_UNLOCKED),
154 DRM_IOCTL_DEF(DRM_IOCTL_MODE_DETACHMODE, drm_noop, DRM_MASTER|DRM_CONTROL_ALLOW|DRM_UNLOCKED),
155 DRM_IOCTL_DEF(DRM_IOCTL_MODE_GETPROPERTY, drm_mode_getproperty_ioctl, DRM_CONTROL_ALLOW|DRM_UNLOCKED),
156 DRM_IOCTL_DEF(DRM_IOCTL_MODE_SETPROPERTY, drm_mode_connector_property_set_ioctl, DRM_MASTER|DRM_CONTROL_ALLOW|DRM_UNLOCKED),
157 DRM_IOCTL_DEF(DRM_IOCTL_MODE_GETPROPBLOB, drm_mode_getblob_ioctl, DRM_CONTROL_ALLOW|DRM_UNLOCKED),
158 DRM_IOCTL_DEF(DRM_IOCTL_MODE_GETFB, drm_mode_getfb, DRM_CONTROL_ALLOW|DRM_UNLOCKED),
159 DRM_IOCTL_DEF(DRM_IOCTL_MODE_ADDFB, drm_mode_addfb, DRM_CONTROL_ALLOW|DRM_UNLOCKED),
160 DRM_IOCTL_DEF(DRM_IOCTL_MODE_ADDFB2, drm_mode_addfb2, DRM_CONTROL_ALLOW|DRM_UNLOCKED),
161 DRM_IOCTL_DEF(DRM_IOCTL_MODE_RMFB, drm_mode_rmfb, DRM_CONTROL_ALLOW|DRM_UNLOCKED),
162 DRM_IOCTL_DEF(DRM_IOCTL_MODE_PAGE_FLIP, drm_mode_page_flip_ioctl, DRM_MASTER|DRM_CONTROL_ALLOW|DRM_UNLOCKED),
163 DRM_IOCTL_DEF(DRM_IOCTL_MODE_DIRTYFB, drm_mode_dirtyfb_ioctl, DRM_MASTER|DRM_CONTROL_ALLOW|DRM_UNLOCKED),
164 DRM_IOCTL_DEF(DRM_IOCTL_MODE_CREATE_DUMB, drm_mode_create_dumb_ioctl, DRM_CONTROL_ALLOW|DRM_UNLOCKED),
165 DRM_IOCTL_DEF(DRM_IOCTL_MODE_MAP_DUMB, drm_mode_mmap_dumb_ioctl, DRM_CONTROL_ALLOW|DRM_UNLOCKED),
166 DRM_IOCTL_DEF(DRM_IOCTL_MODE_DESTROY_DUMB, drm_mode_destroy_dumb_ioctl, DRM_CONTROL_ALLOW|DRM_UNLOCKED),
167 DRM_IOCTL_DEF(DRM_IOCTL_MODE_OBJ_GETPROPERTIES, drm_mode_obj_get_properties_ioctl, DRM_CONTROL_ALLOW|DRM_UNLOCKED),
168 DRM_IOCTL_DEF(DRM_IOCTL_MODE_OBJ_SETPROPERTY, drm_mode_obj_set_property_ioctl, DRM_MASTER|DRM_CONTROL_ALLOW|DRM_UNLOCKED),
169 DRM_IOCTL_DEF(DRM_IOCTL_MODE_CURSOR2, drm_mode_cursor2_ioctl, DRM_MASTER|DRM_CONTROL_ALLOW|DRM_UNLOCKED),
170};
171
172#define DRM_CORE_IOCTL_COUNT ARRAY_SIZE( drm_ioctls )
173
174/**
175 * Copy and IOCTL return string to user space
176 */
177static int drm_copy_field(char __user *buf, size_t *buf_len, const char *value)
178{
179 int len;
180
181 /* don't overflow userbuf */
182 len = strlen(value);
183 if (len > *buf_len)
184 len = *buf_len;
185
186 /* let userspace know exact length of driver value (which could be
187 * larger than the userspace-supplied buffer) */
188 *buf_len = strlen(value);
189
190 /* finally, try filling in the userbuf */
191 if (len && buf)
192 if (copy_to_user(buf, value, len))
193 return -EFAULT;
194 return 0;
195}
196
197/**
198 * Get version information
199 *
200 * \param inode device inode.
201 * \param filp file pointer.
202 * \param cmd command.
203 * \param arg user argument, pointing to a drm_version structure.
204 * \return zero on success or negative number on failure.
205 *
206 * Fills in the version information in \p arg.
207 */
208static int drm_version(struct drm_device *dev, void *data,
209 struct drm_file *file_priv)
210{
211 struct drm_version *version = data;
212 int err;
213
214 version->version_major = dev->driver->major;
215 version->version_minor = dev->driver->minor;
216 version->version_patchlevel = dev->driver->patchlevel;
217 err = drm_copy_field(version->name, &version->name_len,
218 dev->driver->name);
219 if (!err)
220 err = drm_copy_field(version->date, &version->date_len,
221 dev->driver->date);
222 if (!err)
223 err = drm_copy_field(version->desc, &version->desc_len,
224 dev->driver->desc);
225
226 return err;
227}
228
229/**
230 * drm_ioctl_permit - Check ioctl permissions against caller
231 *
232 * @flags: ioctl permission flags.
233 * @file_priv: Pointer to struct drm_file identifying the caller.
234 *
235 * Checks whether the caller is allowed to run an ioctl with the
236 * indicated permissions. If so, returns zero. Otherwise returns an
237 * error code suitable for ioctl return.
238 */
239static int drm_ioctl_permit(u32 flags, struct drm_file *file_priv)
240{
241 /* ROOT_ONLY is only for CAP_SYS_ADMIN */
242 if (unlikely((flags & DRM_ROOT_ONLY) && !capable(CAP_SYS_ADMIN)))
243 return -EACCES;
244
245 /* AUTH is only for authenticated or render client */
246 if (unlikely((flags & DRM_AUTH) && !drm_is_render_client(file_priv) &&
247 !file_priv->authenticated))
248 return -EACCES;
249
250 /* MASTER is only for master or control clients */
251 if (unlikely((flags & DRM_MASTER) && !drm_is_master(file_priv) &&
252 !drm_is_control_client(file_priv)))
253 return -EACCES;
254
255 /* Control clients must be explicitly allowed */
256 if (unlikely(!(flags & DRM_CONTROL_ALLOW) &&
257 drm_is_control_client(file_priv)))
258 return -EACCES;
259
260 /* Render clients must be explicitly allowed */
261 if (unlikely(!(flags & DRM_RENDER_ALLOW) &&
262 drm_is_render_client(file_priv)))
263 return -EACCES;
264
265 return 0;
266}
267
268/**
269 * Called whenever a process performs an ioctl on /dev/drm.
270 *
271 * \param inode device inode.
272 * \param file_priv DRM file private.
273 * \param cmd command.
274 * \param arg user argument.
275 * \return zero on success or negative number on failure.
276 *
277 * Looks up the ioctl function in the ::ioctls table, checking for root
278 * previleges if so required, and dispatches to the respective function.
279 */
280long drm_ioctl(struct file *filp,
281 unsigned int cmd, unsigned long arg)
282{
283 struct drm_file *file_priv = filp->private_data;
284 struct drm_device *dev;
285 const struct drm_ioctl_desc *ioctl = NULL;
286 drm_ioctl_t *func;
287 unsigned int nr = DRM_IOCTL_NR(cmd);
288 int retcode = -EINVAL;
289 char stack_kdata[128];
290 char *kdata = NULL;
291 unsigned int usize, asize;
292
293 dev = file_priv->minor->dev;
294
295 if (drm_device_is_unplugged(dev))
296 return -ENODEV;
297
298 if ((nr >= DRM_CORE_IOCTL_COUNT) &&
299 ((nr < DRM_COMMAND_BASE) || (nr >= DRM_COMMAND_END)))
300 goto err_i1;
301 if ((nr >= DRM_COMMAND_BASE) && (nr < DRM_COMMAND_END) &&
302 (nr < DRM_COMMAND_BASE + dev->driver->num_ioctls)) {
303 u32 drv_size;
304 ioctl = &dev->driver->ioctls[nr - DRM_COMMAND_BASE];
305 drv_size = _IOC_SIZE(ioctl->cmd_drv);
306 usize = asize = _IOC_SIZE(cmd);
307 if (drv_size > asize)
308 asize = drv_size;
309 cmd = ioctl->cmd_drv;
310 }
311 else if ((nr >= DRM_COMMAND_END) || (nr < DRM_COMMAND_BASE)) {
312 u32 drv_size;
313
314 ioctl = &drm_ioctls[nr];
315
316 drv_size = _IOC_SIZE(ioctl->cmd);
317 usize = asize = _IOC_SIZE(cmd);
318 if (drv_size > asize)
319 asize = drv_size;
320
321 cmd = ioctl->cmd;
322 } else
323 goto err_i1;
324
325 DRM_DEBUG("pid=%d, dev=0x%lx, auth=%d, %s\n",
326 task_pid_nr(current),
327 (long)old_encode_dev(file_priv->minor->kdev->devt),
328 file_priv->authenticated, ioctl->name);
329
330 /* Do not trust userspace, use our own definition */
331 func = ioctl->func;
332
333 if (unlikely(!func)) {
334 DRM_DEBUG("no function\n");
335 retcode = -EINVAL;
336 goto err_i1;
337 }
338
339 retcode = drm_ioctl_permit(ioctl->flags, file_priv);
340 if (unlikely(retcode))
341 goto err_i1;
342
343 if (cmd & (IOC_IN | IOC_OUT)) {
344 if (asize <= sizeof(stack_kdata)) {
345 kdata = stack_kdata;
346 } else {
347 kdata = kmalloc(asize, GFP_KERNEL);
348 if (!kdata) {
349 retcode = -ENOMEM;
350 goto err_i1;
351 }
352 }
353 if (asize > usize)
354 memset(kdata + usize, 0, asize - usize);
355 }
356
357 if (cmd & IOC_IN) {
358 if (copy_from_user(kdata, (void __user *)arg,
359 usize) != 0) {
360 retcode = -EFAULT;
361 goto err_i1;
362 }
363 } else if (cmd & IOC_OUT) {
364 memset(kdata, 0, usize);
365 }
366
367 if (ioctl->flags & DRM_UNLOCKED)
368 retcode = func(dev, kdata, file_priv);
369 else {
370 mutex_lock(&drm_global_mutex);
371 retcode = func(dev, kdata, file_priv);
372 mutex_unlock(&drm_global_mutex);
373 }
374
375 if (cmd & IOC_OUT) {
376 if (copy_to_user((void __user *)arg, kdata,
377 usize) != 0)
378 retcode = -EFAULT;
379 }
380
381 err_i1:
382 if (!ioctl)
383 DRM_DEBUG("invalid ioctl: pid=%d, dev=0x%lx, auth=%d, cmd=0x%02x, nr=0x%02x\n",
384 task_pid_nr(current),
385 (long)old_encode_dev(file_priv->minor->kdev->devt),
386 file_priv->authenticated, cmd, nr);
387
388 if (kdata != stack_kdata)
389 kfree(kdata);
390 if (retcode)
391 DRM_DEBUG("ret = %d\n", retcode);
392 return retcode;
393}
394EXPORT_SYMBOL(drm_ioctl);
395
396/**
397 * drm_ioctl_flags - Check for core ioctl and return ioctl permission flags
398 *
399 * @nr: Ioctl number.
400 * @flags: Where to return the ioctl permission flags
401 */
402bool drm_ioctl_flags(unsigned int nr, unsigned int *flags)
403{
404 if ((nr >= DRM_COMMAND_END && nr < DRM_CORE_IOCTL_COUNT) ||
405 (nr < DRM_COMMAND_BASE)) {
406 *flags = drm_ioctls[nr].flags;
407 return true;
408 }
409
410 return false;
411}
412EXPORT_SYMBOL(drm_ioctl_flags);
diff --git a/drivers/gpu/drm/drm_ioctl.c b/drivers/gpu/drm/drm_ioctl.c
index ad66f961170e..22ca14d67060 100644
--- a/drivers/gpu/drm/drm_ioctl.c
+++ b/drivers/gpu/drm/drm_ioctl.c
@@ -1,11 +1,3 @@
1/**
2 * \file drm_ioctl.c
3 * IOCTL processing for DRM
4 *
5 * \author Rickard E. (Rik) Faith <faith@valinux.com>
6 * \author Gareth Hughes <gareth@valinux.com>
7 */
8
9/* 1/*
10 * Created: Fri Jan 8 09:01:26 1999 by faith@valinux.com 2 * Created: Fri Jan 8 09:01:26 1999 by faith@valinux.com
11 * 3 *
@@ -13,6 +5,9 @@
13 * Copyright 2000 VA Linux Systems, Inc., Sunnyvale, California. 5 * Copyright 2000 VA Linux Systems, Inc., Sunnyvale, California.
14 * All Rights Reserved. 6 * All Rights Reserved.
15 * 7 *
8 * Author Rickard E. (Rik) Faith <faith@valinux.com>
9 * Author Gareth Hughes <gareth@valinux.com>
10 *
16 * Permission is hereby granted, free of charge, to any person obtaining a 11 * Permission is hereby granted, free of charge, to any person obtaining a
17 * copy of this software and associated documentation files (the "Software"), 12 * copy of this software and associated documentation files (the "Software"),
18 * to deal in the Software without restriction, including without limitation 13 * to deal in the Software without restriction, including without limitation
@@ -42,6 +37,124 @@
42#include <asm/mtrr.h> 37#include <asm/mtrr.h>
43#endif 38#endif
44 39
40static int drm_version(struct drm_device *dev, void *data,
41 struct drm_file *file_priv);
42
43#define DRM_IOCTL_DEF(ioctl, _func, _flags) \
44 [DRM_IOCTL_NR(ioctl)] = {.cmd = ioctl, .func = _func, .flags = _flags, .cmd_drv = 0, .name = #ioctl}
45
46/** Ioctl table */
47static const struct drm_ioctl_desc drm_ioctls[] = {
48 DRM_IOCTL_DEF(DRM_IOCTL_VERSION, drm_version, DRM_UNLOCKED|DRM_RENDER_ALLOW),
49 DRM_IOCTL_DEF(DRM_IOCTL_GET_UNIQUE, drm_getunique, 0),
50 DRM_IOCTL_DEF(DRM_IOCTL_GET_MAGIC, drm_getmagic, 0),
51 DRM_IOCTL_DEF(DRM_IOCTL_IRQ_BUSID, drm_irq_by_busid, DRM_MASTER|DRM_ROOT_ONLY),
52 DRM_IOCTL_DEF(DRM_IOCTL_GET_MAP, drm_getmap, DRM_UNLOCKED),
53 DRM_IOCTL_DEF(DRM_IOCTL_GET_CLIENT, drm_getclient, DRM_UNLOCKED),
54 DRM_IOCTL_DEF(DRM_IOCTL_GET_STATS, drm_getstats, DRM_UNLOCKED),
55 DRM_IOCTL_DEF(DRM_IOCTL_GET_CAP, drm_getcap, DRM_UNLOCKED|DRM_RENDER_ALLOW),
56 DRM_IOCTL_DEF(DRM_IOCTL_SET_CLIENT_CAP, drm_setclientcap, 0),
57 DRM_IOCTL_DEF(DRM_IOCTL_SET_VERSION, drm_setversion, DRM_MASTER),
58
59 DRM_IOCTL_DEF(DRM_IOCTL_SET_UNIQUE, drm_setunique, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
60 DRM_IOCTL_DEF(DRM_IOCTL_BLOCK, drm_noop, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
61 DRM_IOCTL_DEF(DRM_IOCTL_UNBLOCK, drm_noop, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
62 DRM_IOCTL_DEF(DRM_IOCTL_AUTH_MAGIC, drm_authmagic, DRM_AUTH|DRM_MASTER),
63
64 DRM_IOCTL_DEF(DRM_IOCTL_ADD_MAP, drm_addmap_ioctl, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
65 DRM_IOCTL_DEF(DRM_IOCTL_RM_MAP, drm_rmmap_ioctl, DRM_AUTH),
66
67 DRM_IOCTL_DEF(DRM_IOCTL_SET_SAREA_CTX, drm_setsareactx, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
68 DRM_IOCTL_DEF(DRM_IOCTL_GET_SAREA_CTX, drm_getsareactx, DRM_AUTH),
69
70 DRM_IOCTL_DEF(DRM_IOCTL_SET_MASTER, drm_setmaster_ioctl, DRM_ROOT_ONLY),
71 DRM_IOCTL_DEF(DRM_IOCTL_DROP_MASTER, drm_dropmaster_ioctl, DRM_ROOT_ONLY),
72
73 DRM_IOCTL_DEF(DRM_IOCTL_ADD_CTX, drm_addctx, DRM_AUTH|DRM_ROOT_ONLY),
74 DRM_IOCTL_DEF(DRM_IOCTL_RM_CTX, drm_rmctx, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
75 DRM_IOCTL_DEF(DRM_IOCTL_MOD_CTX, drm_noop, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
76 DRM_IOCTL_DEF(DRM_IOCTL_GET_CTX, drm_getctx, DRM_AUTH),
77 DRM_IOCTL_DEF(DRM_IOCTL_SWITCH_CTX, drm_switchctx, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
78 DRM_IOCTL_DEF(DRM_IOCTL_NEW_CTX, drm_newctx, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
79 DRM_IOCTL_DEF(DRM_IOCTL_RES_CTX, drm_resctx, DRM_AUTH),
80
81 DRM_IOCTL_DEF(DRM_IOCTL_ADD_DRAW, drm_noop, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
82 DRM_IOCTL_DEF(DRM_IOCTL_RM_DRAW, drm_noop, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
83
84 DRM_IOCTL_DEF(DRM_IOCTL_LOCK, drm_lock, DRM_AUTH),
85 DRM_IOCTL_DEF(DRM_IOCTL_UNLOCK, drm_unlock, DRM_AUTH),
86
87 DRM_IOCTL_DEF(DRM_IOCTL_FINISH, drm_noop, DRM_AUTH),
88
89 DRM_IOCTL_DEF(DRM_IOCTL_ADD_BUFS, drm_addbufs, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
90 DRM_IOCTL_DEF(DRM_IOCTL_MARK_BUFS, drm_markbufs, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
91 DRM_IOCTL_DEF(DRM_IOCTL_INFO_BUFS, drm_infobufs, DRM_AUTH),
92 DRM_IOCTL_DEF(DRM_IOCTL_MAP_BUFS, drm_mapbufs, DRM_AUTH),
93 DRM_IOCTL_DEF(DRM_IOCTL_FREE_BUFS, drm_freebufs, DRM_AUTH),
94 DRM_IOCTL_DEF(DRM_IOCTL_DMA, drm_dma_ioctl, DRM_AUTH),
95
96 DRM_IOCTL_DEF(DRM_IOCTL_CONTROL, drm_control, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
97
98#if __OS_HAS_AGP
99 DRM_IOCTL_DEF(DRM_IOCTL_AGP_ACQUIRE, drm_agp_acquire_ioctl, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
100 DRM_IOCTL_DEF(DRM_IOCTL_AGP_RELEASE, drm_agp_release_ioctl, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
101 DRM_IOCTL_DEF(DRM_IOCTL_AGP_ENABLE, drm_agp_enable_ioctl, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
102 DRM_IOCTL_DEF(DRM_IOCTL_AGP_INFO, drm_agp_info_ioctl, DRM_AUTH),
103 DRM_IOCTL_DEF(DRM_IOCTL_AGP_ALLOC, drm_agp_alloc_ioctl, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
104 DRM_IOCTL_DEF(DRM_IOCTL_AGP_FREE, drm_agp_free_ioctl, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
105 DRM_IOCTL_DEF(DRM_IOCTL_AGP_BIND, drm_agp_bind_ioctl, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
106 DRM_IOCTL_DEF(DRM_IOCTL_AGP_UNBIND, drm_agp_unbind_ioctl, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
107#endif
108
109 DRM_IOCTL_DEF(DRM_IOCTL_SG_ALLOC, drm_sg_alloc, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
110 DRM_IOCTL_DEF(DRM_IOCTL_SG_FREE, drm_sg_free, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
111
112 DRM_IOCTL_DEF(DRM_IOCTL_WAIT_VBLANK, drm_wait_vblank, DRM_UNLOCKED),
113
114 DRM_IOCTL_DEF(DRM_IOCTL_MODESET_CTL, drm_modeset_ctl, 0),
115
116 DRM_IOCTL_DEF(DRM_IOCTL_UPDATE_DRAW, drm_noop, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
117
118 DRM_IOCTL_DEF(DRM_IOCTL_GEM_CLOSE, drm_gem_close_ioctl, DRM_UNLOCKED|DRM_RENDER_ALLOW),
119 DRM_IOCTL_DEF(DRM_IOCTL_GEM_FLINK, drm_gem_flink_ioctl, DRM_AUTH|DRM_UNLOCKED),
120 DRM_IOCTL_DEF(DRM_IOCTL_GEM_OPEN, drm_gem_open_ioctl, DRM_AUTH|DRM_UNLOCKED),
121
122 DRM_IOCTL_DEF(DRM_IOCTL_MODE_GETRESOURCES, drm_mode_getresources, DRM_CONTROL_ALLOW|DRM_UNLOCKED),
123
124 DRM_IOCTL_DEF(DRM_IOCTL_PRIME_HANDLE_TO_FD, drm_prime_handle_to_fd_ioctl, DRM_AUTH|DRM_UNLOCKED|DRM_RENDER_ALLOW),
125 DRM_IOCTL_DEF(DRM_IOCTL_PRIME_FD_TO_HANDLE, drm_prime_fd_to_handle_ioctl, DRM_AUTH|DRM_UNLOCKED|DRM_RENDER_ALLOW),
126
127 DRM_IOCTL_DEF(DRM_IOCTL_MODE_GETPLANERESOURCES, drm_mode_getplane_res, DRM_CONTROL_ALLOW|DRM_UNLOCKED),
128 DRM_IOCTL_DEF(DRM_IOCTL_MODE_GETCRTC, drm_mode_getcrtc, DRM_CONTROL_ALLOW|DRM_UNLOCKED),
129 DRM_IOCTL_DEF(DRM_IOCTL_MODE_SETCRTC, drm_mode_setcrtc, DRM_MASTER|DRM_CONTROL_ALLOW|DRM_UNLOCKED),
130 DRM_IOCTL_DEF(DRM_IOCTL_MODE_GETPLANE, drm_mode_getplane, DRM_CONTROL_ALLOW|DRM_UNLOCKED),
131 DRM_IOCTL_DEF(DRM_IOCTL_MODE_SETPLANE, drm_mode_setplane, DRM_MASTER|DRM_CONTROL_ALLOW|DRM_UNLOCKED),
132 DRM_IOCTL_DEF(DRM_IOCTL_MODE_CURSOR, drm_mode_cursor_ioctl, DRM_MASTER|DRM_CONTROL_ALLOW|DRM_UNLOCKED),
133 DRM_IOCTL_DEF(DRM_IOCTL_MODE_GETGAMMA, drm_mode_gamma_get_ioctl, DRM_UNLOCKED),
134 DRM_IOCTL_DEF(DRM_IOCTL_MODE_SETGAMMA, drm_mode_gamma_set_ioctl, DRM_MASTER|DRM_UNLOCKED),
135 DRM_IOCTL_DEF(DRM_IOCTL_MODE_GETENCODER, drm_mode_getencoder, DRM_CONTROL_ALLOW|DRM_UNLOCKED),
136 DRM_IOCTL_DEF(DRM_IOCTL_MODE_GETCONNECTOR, drm_mode_getconnector, DRM_CONTROL_ALLOW|DRM_UNLOCKED),
137 DRM_IOCTL_DEF(DRM_IOCTL_MODE_ATTACHMODE, drm_noop, DRM_MASTER|DRM_CONTROL_ALLOW|DRM_UNLOCKED),
138 DRM_IOCTL_DEF(DRM_IOCTL_MODE_DETACHMODE, drm_noop, DRM_MASTER|DRM_CONTROL_ALLOW|DRM_UNLOCKED),
139 DRM_IOCTL_DEF(DRM_IOCTL_MODE_GETPROPERTY, drm_mode_getproperty_ioctl, DRM_CONTROL_ALLOW|DRM_UNLOCKED),
140 DRM_IOCTL_DEF(DRM_IOCTL_MODE_SETPROPERTY, drm_mode_connector_property_set_ioctl, DRM_MASTER|DRM_CONTROL_ALLOW|DRM_UNLOCKED),
141 DRM_IOCTL_DEF(DRM_IOCTL_MODE_GETPROPBLOB, drm_mode_getblob_ioctl, DRM_CONTROL_ALLOW|DRM_UNLOCKED),
142 DRM_IOCTL_DEF(DRM_IOCTL_MODE_GETFB, drm_mode_getfb, DRM_CONTROL_ALLOW|DRM_UNLOCKED),
143 DRM_IOCTL_DEF(DRM_IOCTL_MODE_ADDFB, drm_mode_addfb, DRM_CONTROL_ALLOW|DRM_UNLOCKED),
144 DRM_IOCTL_DEF(DRM_IOCTL_MODE_ADDFB2, drm_mode_addfb2, DRM_CONTROL_ALLOW|DRM_UNLOCKED),
145 DRM_IOCTL_DEF(DRM_IOCTL_MODE_RMFB, drm_mode_rmfb, DRM_CONTROL_ALLOW|DRM_UNLOCKED),
146 DRM_IOCTL_DEF(DRM_IOCTL_MODE_PAGE_FLIP, drm_mode_page_flip_ioctl, DRM_MASTER|DRM_CONTROL_ALLOW|DRM_UNLOCKED),
147 DRM_IOCTL_DEF(DRM_IOCTL_MODE_DIRTYFB, drm_mode_dirtyfb_ioctl, DRM_MASTER|DRM_CONTROL_ALLOW|DRM_UNLOCKED),
148 DRM_IOCTL_DEF(DRM_IOCTL_MODE_CREATE_DUMB, drm_mode_create_dumb_ioctl, DRM_CONTROL_ALLOW|DRM_UNLOCKED),
149 DRM_IOCTL_DEF(DRM_IOCTL_MODE_MAP_DUMB, drm_mode_mmap_dumb_ioctl, DRM_CONTROL_ALLOW|DRM_UNLOCKED),
150 DRM_IOCTL_DEF(DRM_IOCTL_MODE_DESTROY_DUMB, drm_mode_destroy_dumb_ioctl, DRM_CONTROL_ALLOW|DRM_UNLOCKED),
151 DRM_IOCTL_DEF(DRM_IOCTL_MODE_OBJ_GETPROPERTIES, drm_mode_obj_get_properties_ioctl, DRM_CONTROL_ALLOW|DRM_UNLOCKED),
152 DRM_IOCTL_DEF(DRM_IOCTL_MODE_OBJ_SETPROPERTY, drm_mode_obj_set_property_ioctl, DRM_MASTER|DRM_CONTROL_ALLOW|DRM_UNLOCKED),
153 DRM_IOCTL_DEF(DRM_IOCTL_MODE_CURSOR2, drm_mode_cursor2_ioctl, DRM_MASTER|DRM_CONTROL_ALLOW|DRM_UNLOCKED),
154};
155
156#define DRM_CORE_IOCTL_COUNT ARRAY_SIZE( drm_ioctls )
157
45/** 158/**
46 * Get the bus id. 159 * Get the bus id.
47 * 160 *
@@ -415,3 +528,243 @@ int drm_noop(struct drm_device *dev, void *data,
415 return 0; 528 return 0;
416} 529}
417EXPORT_SYMBOL(drm_noop); 530EXPORT_SYMBOL(drm_noop);
531
532/**
533 * Copy and IOCTL return string to user space
534 */
535static int drm_copy_field(char __user *buf, size_t *buf_len, const char *value)
536{
537 int len;
538
539 /* don't overflow userbuf */
540 len = strlen(value);
541 if (len > *buf_len)
542 len = *buf_len;
543
544 /* let userspace know exact length of driver value (which could be
545 * larger than the userspace-supplied buffer) */
546 *buf_len = strlen(value);
547
548 /* finally, try filling in the userbuf */
549 if (len && buf)
550 if (copy_to_user(buf, value, len))
551 return -EFAULT;
552 return 0;
553}
554
555/**
556 * Get version information
557 *
558 * \param inode device inode.
559 * \param filp file pointer.
560 * \param cmd command.
561 * \param arg user argument, pointing to a drm_version structure.
562 * \return zero on success or negative number on failure.
563 *
564 * Fills in the version information in \p arg.
565 */
566static int drm_version(struct drm_device *dev, void *data,
567 struct drm_file *file_priv)
568{
569 struct drm_version *version = data;
570 int err;
571
572 version->version_major = dev->driver->major;
573 version->version_minor = dev->driver->minor;
574 version->version_patchlevel = dev->driver->patchlevel;
575 err = drm_copy_field(version->name, &version->name_len,
576 dev->driver->name);
577 if (!err)
578 err = drm_copy_field(version->date, &version->date_len,
579 dev->driver->date);
580 if (!err)
581 err = drm_copy_field(version->desc, &version->desc_len,
582 dev->driver->desc);
583
584 return err;
585}
586
587/**
588 * drm_ioctl_permit - Check ioctl permissions against caller
589 *
590 * @flags: ioctl permission flags.
591 * @file_priv: Pointer to struct drm_file identifying the caller.
592 *
593 * Checks whether the caller is allowed to run an ioctl with the
594 * indicated permissions. If so, returns zero. Otherwise returns an
595 * error code suitable for ioctl return.
596 */
597static int drm_ioctl_permit(u32 flags, struct drm_file *file_priv)
598{
599 /* ROOT_ONLY is only for CAP_SYS_ADMIN */
600 if (unlikely((flags & DRM_ROOT_ONLY) && !capable(CAP_SYS_ADMIN)))
601 return -EACCES;
602
603 /* AUTH is only for authenticated or render client */
604 if (unlikely((flags & DRM_AUTH) && !drm_is_render_client(file_priv) &&
605 !file_priv->authenticated))
606 return -EACCES;
607
608 /* MASTER is only for master or control clients */
609 if (unlikely((flags & DRM_MASTER) && !drm_is_master(file_priv) &&
610 !drm_is_control_client(file_priv)))
611 return -EACCES;
612
613 /* Control clients must be explicitly allowed */
614 if (unlikely(!(flags & DRM_CONTROL_ALLOW) &&
615 drm_is_control_client(file_priv)))
616 return -EACCES;
617
618 /* Render clients must be explicitly allowed */
619 if (unlikely(!(flags & DRM_RENDER_ALLOW) &&
620 drm_is_render_client(file_priv)))
621 return -EACCES;
622
623 return 0;
624}
625
626/**
627 * Called whenever a process performs an ioctl on /dev/drm.
628 *
629 * \param inode device inode.
630 * \param file_priv DRM file private.
631 * \param cmd command.
632 * \param arg user argument.
633 * \return zero on success or negative number on failure.
634 *
635 * Looks up the ioctl function in the ::ioctls table, checking for root
636 * previleges if so required, and dispatches to the respective function.
637 */
638long drm_ioctl(struct file *filp,
639 unsigned int cmd, unsigned long arg)
640{
641 struct drm_file *file_priv = filp->private_data;
642 struct drm_device *dev;
643 const struct drm_ioctl_desc *ioctl = NULL;
644 drm_ioctl_t *func;
645 unsigned int nr = DRM_IOCTL_NR(cmd);
646 int retcode = -EINVAL;
647 char stack_kdata[128];
648 char *kdata = NULL;
649 unsigned int usize, asize;
650
651 dev = file_priv->minor->dev;
652
653 if (drm_device_is_unplugged(dev))
654 return -ENODEV;
655
656 if ((nr >= DRM_CORE_IOCTL_COUNT) &&
657 ((nr < DRM_COMMAND_BASE) || (nr >= DRM_COMMAND_END)))
658 goto err_i1;
659 if ((nr >= DRM_COMMAND_BASE) && (nr < DRM_COMMAND_END) &&
660 (nr < DRM_COMMAND_BASE + dev->driver->num_ioctls)) {
661 u32 drv_size;
662 ioctl = &dev->driver->ioctls[nr - DRM_COMMAND_BASE];
663 drv_size = _IOC_SIZE(ioctl->cmd_drv);
664 usize = asize = _IOC_SIZE(cmd);
665 if (drv_size > asize)
666 asize = drv_size;
667 cmd = ioctl->cmd_drv;
668 }
669 else if ((nr >= DRM_COMMAND_END) || (nr < DRM_COMMAND_BASE)) {
670 u32 drv_size;
671
672 ioctl = &drm_ioctls[nr];
673
674 drv_size = _IOC_SIZE(ioctl->cmd);
675 usize = asize = _IOC_SIZE(cmd);
676 if (drv_size > asize)
677 asize = drv_size;
678
679 cmd = ioctl->cmd;
680 } else
681 goto err_i1;
682
683 DRM_DEBUG("pid=%d, dev=0x%lx, auth=%d, %s\n",
684 task_pid_nr(current),
685 (long)old_encode_dev(file_priv->minor->kdev->devt),
686 file_priv->authenticated, ioctl->name);
687
688 /* Do not trust userspace, use our own definition */
689 func = ioctl->func;
690
691 if (unlikely(!func)) {
692 DRM_DEBUG("no function\n");
693 retcode = -EINVAL;
694 goto err_i1;
695 }
696
697 retcode = drm_ioctl_permit(ioctl->flags, file_priv);
698 if (unlikely(retcode))
699 goto err_i1;
700
701 if (cmd & (IOC_IN | IOC_OUT)) {
702 if (asize <= sizeof(stack_kdata)) {
703 kdata = stack_kdata;
704 } else {
705 kdata = kmalloc(asize, GFP_KERNEL);
706 if (!kdata) {
707 retcode = -ENOMEM;
708 goto err_i1;
709 }
710 }
711 if (asize > usize)
712 memset(kdata + usize, 0, asize - usize);
713 }
714
715 if (cmd & IOC_IN) {
716 if (copy_from_user(kdata, (void __user *)arg,
717 usize) != 0) {
718 retcode = -EFAULT;
719 goto err_i1;
720 }
721 } else if (cmd & IOC_OUT) {
722 memset(kdata, 0, usize);
723 }
724
725 if (ioctl->flags & DRM_UNLOCKED)
726 retcode = func(dev, kdata, file_priv);
727 else {
728 mutex_lock(&drm_global_mutex);
729 retcode = func(dev, kdata, file_priv);
730 mutex_unlock(&drm_global_mutex);
731 }
732
733 if (cmd & IOC_OUT) {
734 if (copy_to_user((void __user *)arg, kdata,
735 usize) != 0)
736 retcode = -EFAULT;
737 }
738
739 err_i1:
740 if (!ioctl)
741 DRM_DEBUG("invalid ioctl: pid=%d, dev=0x%lx, auth=%d, cmd=0x%02x, nr=0x%02x\n",
742 task_pid_nr(current),
743 (long)old_encode_dev(file_priv->minor->kdev->devt),
744 file_priv->authenticated, cmd, nr);
745
746 if (kdata != stack_kdata)
747 kfree(kdata);
748 if (retcode)
749 DRM_DEBUG("ret = %d\n", retcode);
750 return retcode;
751}
752EXPORT_SYMBOL(drm_ioctl);
753
754/**
755 * drm_ioctl_flags - Check for core ioctl and return ioctl permission flags
756 *
757 * @nr: Ioctl number.
758 * @flags: Where to return the ioctl permission flags
759 */
760bool drm_ioctl_flags(unsigned int nr, unsigned int *flags)
761{
762 if ((nr >= DRM_COMMAND_END && nr < DRM_CORE_IOCTL_COUNT) ||
763 (nr < DRM_COMMAND_BASE)) {
764 *flags = drm_ioctls[nr].flags;
765 return true;
766 }
767
768 return false;
769}
770EXPORT_SYMBOL(drm_ioctl_flags);
generated by cgit v1.2.2 (git 2.25.0) at 2025-08-23 09:31:25 -0400