1 /*
2 * Copyright (c) 2006, 2014, Oracle and/or its affiliates. All rights reserved.
3 */
4
5 /*
6 * drm_drv.h -- Generic driver template -*- linux-c -*-
7 * Created: Thu Nov 23 03:10:50 2000 by gareth@valinux.com
8 */
9 /*
10 * Copyright 1999, 2000 Precision Insight, Inc., Cedar Park, Texas.
11 * Copyright 2000 VA Linux Systems, Inc., Sunnyvale, California.
12 * Copyright (c) 2009, 2013, Intel Corporation.
13 * All Rights Reserved.
14 *
15 * Permission is hereby granted, free of charge, to any person obtaining a
16 * copy of this software and associated documentation files (the "Software"),
17 * to deal in the Software without restriction, including without limitation
18 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
19 * and/or sell copies of the Software, and to permit persons to whom the
20 * Software is furnished to do so, subject to the following conditions:
21 *
22 * The above copyright notice and this permission notice (including the next
23 * paragraph) shall be included in all copies or substantial portions of the
24 * Software.
25 *
26 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
27 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
28 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
29 * VA LINUX SYSTEMS AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM, DAMAGES OR
30 * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
31 * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
32 * OTHER DEALINGS IN THE SOFTWARE.
33 *
34 * Authors:
35 * Rickard E. (Rik) Faith <faith@valinux.com>
36 * Gareth Hughes <gareth@valinux.com>
37 *
38 */
39
40 #include "drm.h"
41 #include "drmP.h"
42 #include "drm_core.h"
43 #include "drm_io32.h"
44 #include "drm_sarea.h"
45 #include "drm_linux_list.h"
46
47 static int drm_version(DRM_IOCTL_ARGS);
48
49 /** Ioctl table */
50 static struct drm_ioctl_desc drm_ioctls[] = {
51 DRM_IOCTL_DEF(DRM_IOCTL_VERSION, drm_version, DRM_UNLOCKED, copyin32_drm_version, copyout32_drm_version),
52 DRM_IOCTL_DEF(DRM_IOCTL_GET_UNIQUE, drm_getunique, 0, copyin32_drm_unique, copyout32_drm_unique),
53 DRM_IOCTL_DEF(DRM_IOCTL_GET_MAGIC, drm_getmagic, 0, NULL, NULL),
54 DRM_IOCTL_DEF(DRM_IOCTL_IRQ_BUSID, drm_irq_by_busid, DRM_MASTER|DRM_ROOT_ONLY, NULL, NULL),
55 DRM_IOCTL_DEF(DRM_IOCTL_GET_MAP, drm_getmap, DRM_UNLOCKED, copyin32_drm_map, copyout32_drm_map),
56 DRM_IOCTL_DEF(DRM_IOCTL_GET_CLIENT, drm_getclient, DRM_UNLOCKED, copyin32_drm_client, copyout32_drm_client),
57 DRM_IOCTL_DEF(DRM_IOCTL_GET_STATS, drm_getstats, DRM_UNLOCKED, NULL, copyout32_drm_stats),
58 DRM_IOCTL_DEF(DRM_IOCTL_GET_CAP, drm_getcap, DRM_UNLOCKED, NULL, NULL),
59 DRM_IOCTL_DEF(DRM_IOCTL_SET_VERSION, drm_setversion, DRM_MASTER, NULL, NULL),
60
61 DRM_IOCTL_DEF(DRM_IOCTL_SET_UNIQUE, drm_setunique, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY, NULL, NULL),
62 DRM_IOCTL_DEF(DRM_IOCTL_BLOCK, drm_noop, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY, NULL, NULL),
63 DRM_IOCTL_DEF(DRM_IOCTL_UNBLOCK, drm_noop, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY, NULL, NULL),
64 DRM_IOCTL_DEF(DRM_IOCTL_AUTH_MAGIC, drm_authmagic, DRM_AUTH|DRM_MASTER, NULL, NULL),
65
66 DRM_IOCTL_DEF(DRM_IOCTL_ADD_MAP, drm_addmap_ioctl, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY, copyin32_drm_map, copyout32_drm_map),
67 DRM_IOCTL_DEF(DRM_IOCTL_RM_MAP, drm_rmmap_ioctl, DRM_AUTH, copyin32_drm_map, copyout32_drm_map),
68
69 DRM_IOCTL_DEF(DRM_IOCTL_SET_SAREA_CTX, drm_setsareactx, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY, copyin32_drm_ctx_priv_map, NULL),
70 DRM_IOCTL_DEF(DRM_IOCTL_GET_SAREA_CTX, drm_getsareactx, DRM_AUTH, copyin32_drm_ctx_priv_map, copyout32_drm_ctx_priv_map),
71
72 DRM_IOCTL_DEF(DRM_IOCTL_SET_MASTER, drm_setmaster_ioctl, DRM_ROOT_ONLY, NULL, NULL),
73 DRM_IOCTL_DEF(DRM_IOCTL_DROP_MASTER, drm_dropmaster_ioctl, DRM_ROOT_ONLY, NULL, NULL),
74
75 DRM_IOCTL_DEF(DRM_IOCTL_ADD_CTX, drm_addctx, DRM_AUTH|DRM_ROOT_ONLY, NULL, NULL),
76 DRM_IOCTL_DEF(DRM_IOCTL_RM_CTX, drm_rmctx, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY, NULL, NULL),
77 DRM_IOCTL_DEF(DRM_IOCTL_MOD_CTX, drm_modctx, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY, NULL, NULL),
78 DRM_IOCTL_DEF(DRM_IOCTL_GET_CTX, drm_getctx, DRM_AUTH, NULL, NULL),
79 DRM_IOCTL_DEF(DRM_IOCTL_SWITCH_CTX, drm_switchctx, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY, NULL, NULL),
80 DRM_IOCTL_DEF(DRM_IOCTL_NEW_CTX, drm_newctx, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY, NULL, NULL),
81 DRM_IOCTL_DEF(DRM_IOCTL_RES_CTX, drm_resctx, DRM_AUTH, copyin32_drm_ctx_res, copyout32_drm_ctx_res),
82
83 DRM_IOCTL_DEF(DRM_IOCTL_ADD_DRAW, drm_noop, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY, NULL, NULL),
84 DRM_IOCTL_DEF(DRM_IOCTL_RM_DRAW, drm_noop, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY, NULL, NULL),
85
86 DRM_IOCTL_DEF(DRM_IOCTL_LOCK, drm_lock, DRM_AUTH, NULL, NULL),
87 DRM_IOCTL_DEF(DRM_IOCTL_UNLOCK, drm_unlock, DRM_AUTH, NULL, NULL),
88
89 DRM_IOCTL_DEF(DRM_IOCTL_FINISH, drm_noop, DRM_AUTH, NULL, NULL),
90
91 DRM_IOCTL_DEF(DRM_IOCTL_ADD_BUFS, drm_addbufs, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY, copyin32_drm_buf_desc, copyout32_drm_buf_desc),
92 DRM_IOCTL_DEF(DRM_IOCTL_MARK_BUFS, drm_markbufs, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY, NULL, NULL),
93 DRM_IOCTL_DEF(DRM_IOCTL_INFO_BUFS, drm_infobufs, DRM_AUTH, NULL, NULL),
94 DRM_IOCTL_DEF(DRM_IOCTL_MAP_BUFS, drm_mapbufs, DRM_AUTH, copyin32_drm_buf_map, copyout32_drm_buf_map),
95 DRM_IOCTL_DEF(DRM_IOCTL_FREE_BUFS, drm_freebufs, DRM_AUTH, copyin32_drm_buf_free, NULL),
96 /* The DRM_IOCTL_DMA ioctl should be defined by the driver. */
97 DRM_IOCTL_DEF(DRM_IOCTL_DMA, NULL, DRM_AUTH, NULL, NULL),
98
99 DRM_IOCTL_DEF(DRM_IOCTL_CONTROL, drm_control, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY, NULL, NULL),
100
101 DRM_IOCTL_DEF(DRM_IOCTL_AGP_ACQUIRE, drm_agp_acquire_ioctl, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY, NULL, NULL),
102 DRM_IOCTL_DEF(DRM_IOCTL_AGP_RELEASE, drm_agp_release_ioctl, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY, NULL, NULL),
103 DRM_IOCTL_DEF(DRM_IOCTL_AGP_ENABLE, drm_agp_enable_ioctl, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY, NULL, NULL),
104 DRM_IOCTL_DEF(DRM_IOCTL_AGP_INFO, drm_agp_info_ioctl, DRM_AUTH, NULL, NULL),
105 DRM_IOCTL_DEF(DRM_IOCTL_AGP_ALLOC, drm_agp_alloc_ioctl, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY, NULL, NULL),
106 DRM_IOCTL_DEF(DRM_IOCTL_AGP_FREE, drm_agp_free_ioctl, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY, NULL, NULL),
107 DRM_IOCTL_DEF(DRM_IOCTL_AGP_BIND, drm_agp_bind_ioctl, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY, NULL, NULL),
108 DRM_IOCTL_DEF(DRM_IOCTL_AGP_UNBIND, drm_agp_unbind_ioctl, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY, NULL, NULL),
109
110 DRM_IOCTL_DEF(DRM_IOCTL_SG_ALLOC, drm_sg_alloc_ioctl, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY, copyin32_drm_scatter_gather, copyout32_drm_scatter_gather),
111 DRM_IOCTL_DEF(DRM_IOCTL_SG_FREE, drm_sg_free, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY, copyin32_drm_scatter_gather, NULL),
112
113 DRM_IOCTL_DEF(DRM_IOCTL_WAIT_VBLANK, drm_wait_vblank, DRM_UNLOCKED, copyin32_drm_wait_vblank, copyout32_drm_wait_vblank),
114
115 DRM_IOCTL_DEF(DRM_IOCTL_MODESET_CTL, drm_modeset_ctl, 0, NULL, NULL),
116
117 DRM_IOCTL_DEF(DRM_IOCTL_UPDATE_DRAW, drm_noop, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY, NULL, NULL),
118
119 DRM_IOCTL_DEF(DRM_IOCTL_GEM_CLOSE, drm_gem_close_ioctl, DRM_UNLOCKED, NULL, NULL),
120 DRM_IOCTL_DEF(DRM_IOCTL_GEM_FLINK, drm_gem_flink_ioctl, DRM_AUTH|DRM_UNLOCKED, NULL, NULL),
121 DRM_IOCTL_DEF(DRM_IOCTL_GEM_OPEN, drm_gem_open_ioctl, DRM_AUTH|DRM_UNLOCKED, NULL, NULL),
122
123 DRM_IOCTL_DEF(DRM_IOCTL_MODE_GETRESOURCES, drm_mode_getresources, DRM_CONTROL_ALLOW|DRM_UNLOCKED, NULL, NULL),
124
125 DRM_IOCTL_DEF(DRM_IOCTL_MODE_GETPLANERESOURCES, drm_mode_getplane_res, DRM_CONTROL_ALLOW|DRM_UNLOCKED, NULL, NULL),
126 DRM_IOCTL_DEF(DRM_IOCTL_MODE_GETCRTC, drm_mode_getcrtc, DRM_CONTROL_ALLOW|DRM_UNLOCKED, NULL, NULL),
127 DRM_IOCTL_DEF(DRM_IOCTL_MODE_SETCRTC, drm_mode_setcrtc, DRM_MASTER|DRM_CONTROL_ALLOW|DRM_UNLOCKED, NULL, NULL),
128 DRM_IOCTL_DEF(DRM_IOCTL_MODE_GETPLANE, drm_mode_getplane, DRM_CONTROL_ALLOW|DRM_UNLOCKED, NULL, NULL),
129 DRM_IOCTL_DEF(DRM_IOCTL_MODE_SETPLANE, drm_mode_setplane, DRM_MASTER|DRM_CONTROL_ALLOW|DRM_UNLOCKED, NULL, NULL),
130 DRM_IOCTL_DEF(DRM_IOCTL_MODE_CURSOR, drm_mode_cursor_ioctl, DRM_MASTER|DRM_CONTROL_ALLOW|DRM_UNLOCKED, NULL, NULL),
131 DRM_IOCTL_DEF(DRM_IOCTL_MODE_GETGAMMA, drm_mode_gamma_get_ioctl, DRM_UNLOCKED, NULL, NULL),
132 DRM_IOCTL_DEF(DRM_IOCTL_MODE_SETGAMMA, drm_mode_gamma_set_ioctl, DRM_MASTER|DRM_UNLOCKED, NULL, NULL),
133 DRM_IOCTL_DEF(DRM_IOCTL_MODE_GETENCODER, drm_mode_getencoder, DRM_CONTROL_ALLOW|DRM_UNLOCKED, NULL, NULL),
134 DRM_IOCTL_DEF(DRM_IOCTL_MODE_GETCONNECTOR, drm_mode_getconnector, DRM_CONTROL_ALLOW|DRM_UNLOCKED, NULL, NULL),
135 DRM_IOCTL_DEF(DRM_IOCTL_MODE_ATTACHMODE, drm_noop, DRM_MASTER|DRM_CONTROL_ALLOW|DRM_UNLOCKED, NULL, NULL),
136 DRM_IOCTL_DEF(DRM_IOCTL_MODE_DETACHMODE, drm_noop, DRM_MASTER|DRM_CONTROL_ALLOW|DRM_UNLOCKED, NULL, NULL),
137 DRM_IOCTL_DEF(DRM_IOCTL_MODE_GETPROPERTY, drm_mode_getproperty_ioctl, DRM_CONTROL_ALLOW|DRM_UNLOCKED, NULL, NULL),
138 DRM_IOCTL_DEF(DRM_IOCTL_MODE_SETPROPERTY, drm_mode_connector_property_set_ioctl, DRM_MASTER|DRM_CONTROL_ALLOW|DRM_UNLOCKED, NULL, NULL),
139 DRM_IOCTL_DEF(DRM_IOCTL_MODE_GETPROPBLOB, drm_mode_getblob_ioctl, DRM_CONTROL_ALLOW|DRM_UNLOCKED, NULL, NULL),
140 DRM_IOCTL_DEF(DRM_IOCTL_MODE_GETFB, drm_mode_getfb, DRM_CONTROL_ALLOW|DRM_UNLOCKED, NULL, NULL),
141 DRM_IOCTL_DEF(DRM_IOCTL_MODE_ADDFB, drm_mode_addfb, DRM_CONTROL_ALLOW|DRM_UNLOCKED, NULL, NULL),
142 DRM_IOCTL_DEF(DRM_IOCTL_MODE_ADDFB2, drm_mode_addfb2, DRM_CONTROL_ALLOW|DRM_UNLOCKED, NULL, NULL),
143 DRM_IOCTL_DEF(DRM_IOCTL_MODE_RMFB, drm_mode_rmfb, DRM_CONTROL_ALLOW|DRM_UNLOCKED, NULL, NULL),
144 DRM_IOCTL_DEF(DRM_IOCTL_MODE_PAGE_FLIP, drm_mode_page_flip_ioctl, DRM_MASTER|DRM_CONTROL_ALLOW|DRM_UNLOCKED, NULL, NULL),
145 DRM_IOCTL_DEF(DRM_IOCTL_MODE_DIRTYFB, drm_mode_dirtyfb_ioctl, DRM_MASTER|DRM_CONTROL_ALLOW|DRM_UNLOCKED, NULL, NULL),
146 DRM_IOCTL_DEF(DRM_IOCTL_MODE_CREATE_DUMB, drm_mode_create_dumb_ioctl, DRM_CONTROL_ALLOW|DRM_UNLOCKED, NULL, NULL),
147 DRM_IOCTL_DEF(DRM_IOCTL_MODE_MAP_DUMB, drm_mode_mmap_dumb_ioctl, DRM_CONTROL_ALLOW|DRM_UNLOCKED, NULL, NULL),
148 DRM_IOCTL_DEF(DRM_IOCTL_MODE_DESTROY_DUMB, drm_mode_destroy_dumb_ioctl, DRM_CONTROL_ALLOW|DRM_UNLOCKED, NULL, NULL),
149 DRM_IOCTL_DEF(DRM_IOCTL_MODE_OBJ_GETPROPERTIES, drm_mode_obj_get_properties_ioctl, DRM_CONTROL_ALLOW|DRM_UNLOCKED, NULL, NULL),
150 DRM_IOCTL_DEF(DRM_IOCTL_MODE_OBJ_SETPROPERTY, drm_mode_obj_set_property_ioctl, DRM_MASTER|DRM_CONTROL_ALLOW|DRM_UNLOCKED, NULL, NULL),
151 DRM_IOCTL_DEF(DRM_IOCTL_MODE_CURSOR2, drm_mode_cursor2_ioctl, DRM_MASTER|DRM_CONTROL_ALLOW|DRM_UNLOCKED, NULL, NULL)
152 };
153
154 #define DRM_CORE_IOCTL_COUNT ARRAY_SIZE( drm_ioctls )
155
156 /**
157 * Take down the DRM device.
158 *
159 * \param dev DRM device structure.
160 *
161 * Frees every resource in \p dev.
162 *
163 * \sa drm_device
164 */
drm_lastclose(struct drm_device * dev)165 int drm_lastclose(struct drm_device * dev)
166 {
167 DRM_DEBUG("\n");
168
169 if (dev->driver->lastclose)
170 dev->driver->lastclose(dev);
171 DRM_DEBUG("driver lastclose completed\n");
172
173 if (dev->irq_enabled && !drm_core_check_feature(dev, DRIVER_MODESET))
174 (void) drm_irq_uninstall(dev);
175
176 mutex_lock(&dev->struct_mutex);
177
178 /* Clear AGP information */
179 if (drm_core_has_AGP(dev) && dev->agp &&
180 !drm_core_check_feature(dev, DRIVER_MODESET)) {
181 struct drm_agp_mem *entry, *tempe;
182
183 /* Remove AGP resources, but leave dev->agp
184 intact until drv_cleanup is called. */
185 list_for_each_entry_safe(entry, tempe, struct drm_agp_mem, &dev->agp->memory, head) {
186 if (entry->bound)
187 (void) drm_agp_unbind_memory(entry->handle, dev);
188 kfree(entry, sizeof (*entry));
189 }
190 INIT_LIST_HEAD(&dev->agp->memory);
191
192 if (dev->agp->acquired)
193 (void) drm_agp_release(dev);
194
195 dev->agp->acquired = 0;
196 dev->agp->enabled = 0;
197 }
198 if (drm_core_check_feature(dev, DRIVER_SG) && dev->sg &&
199 !drm_core_check_feature(dev, DRIVER_MODESET)) {
200 drm_sg_cleanup(dev->sg);
201 dev->sg = NULL;
202 }
203
204 if (drm_core_check_feature(dev, DRIVER_HAVE_DMA) &&
205 !drm_core_check_feature(dev, DRIVER_MODESET))
206 drm_dma_takedown(dev);
207
208 mutex_unlock(&dev->struct_mutex);
209
210 DRM_DEBUG("lastclose completed\n");
211 return 0;
212 }
213
214 /**
215 * Module initialization. Called via init_module at module load time, or via
216 * linux/init/main.c (this is not currently supported).
217 *
218 * \return zero on success or a negative number on failure.
219 *
220 * Initializes an array of drm_device structures, and attempts to
221 * initialize all available devices, using consecutive minors, registering the
222 * stubs and initializing the AGP device.
223 *
224 * Expands the \c DRIVER_PREINIT and \c DRIVER_POST_INIT macros before and
225 * after the initialization for driver customization.
226 */
drm_init(struct drm_device * dev,struct drm_driver * driver)227 int drm_init(struct drm_device *dev, struct drm_driver *driver)
228 {
229 dev_info_t *dip = dev->devinfo;
230 struct pci_dev *pdev = NULL;
231 struct dev_ops *devop;
232 int ret, i;
233
234 DRM_DEBUG("\n");
235
236 pdev = pci_dev_create(dev);
237 if (!pdev)
238 return -EFAULT;
239
240 for (i = 0; driver->id_table[i].vendor != 0; i++) {
241 if ((driver->id_table[i].vendor == pdev->vendor) &&
242 (driver->id_table[i].device == pdev->device)) {
243 ret = drm_get_dev(dev, pdev, driver, driver->id_table[i].driver_data);
244 if (ret) {
245 pci_dev_destroy(pdev);
246 return ret;
247 }
248
249 /*
250 * DRM drivers are required to use common cb_ops
251 */
252 devop = ddi_get_driver(dev->devinfo);
253 if (devop->devo_cb_ops != &drm_cb_ops) {
254 devop->devo_cb_ops = &drm_cb_ops;
255 }
256 /*
257 * Initialize for fma support
258 */
259 dev->drm_fm_cap = ddi_prop_get_int(DDI_DEV_T_ANY, dip,
260 DDI_PROP_DONTPASS, "fm-capable",
261 DDI_FM_EREPORT_CAPABLE | DDI_FM_DMACHK_CAPABLE |
262 DDI_FM_ACCCHK_CAPABLE | DDI_FM_ERRCB_CAPABLE);
263
264 drm_fm_init(dev);
265 return 0;
266 }
267 }
268
269 pci_dev_destroy(pdev);
270 return -ENODEV;
271 }
272
drm_exit(struct drm_device * dev)273 void drm_exit(struct drm_device *dev)
274 {
275 drm_put_dev(dev);
276 pci_dev_destroy(dev->pdev);
277 drm_fm_fini(dev);
278 }
279
drm_core_init(void)280 int __init drm_core_init(void)
281 {
282 INIT_LIST_HEAD(&drm_iomem_list);
283
284 idr_init(&drm_minors_idr);
285
286 DRM_INFO("Initialized %s %d.%d.%d %s\n",
287 CORE_NAME, CORE_MAJOR, CORE_MINOR, CORE_PATCHLEVEL, CORE_DATE);
288 return 0;
289 }
290
drm_core_exit(void)291 void __exit drm_core_exit(void)
292 {
293 idr_remove_all(&drm_minors_idr);
294 idr_destroy(&drm_minors_idr);
295 }
296
297 /**
298 * Copy and IOCTL return string to user space
299 */
drm_copy_field(char * buf,size_t * buf_len,const char * value)300 static int drm_copy_field(char *buf, size_t *buf_len, const char *value)
301 {
302 int len;
303
304 /* don't overflow userbuf */
305 len = strlen(value);
306 if (len > *buf_len)
307 len = *buf_len;
308
309 /* let userspace know exact length of driver value (which could be
310 * larger than the userspace-supplied buffer) */
311 *buf_len = strlen(value);
312
313 /* finally, try filling in the userbuf */
314 if (len && buf)
315 if (copy_to_user(buf, value, len))
316 return -EFAULT;
317 return 0;
318 }
319
320 /**
321 * Get version information
322 *
323 * \return zero on success or negative number on failure.
324 *
325 * Fills in the version information in \p arg.
326 */
327 /* LINTED */
drm_version(DRM_IOCTL_ARGS)328 static int drm_version(DRM_IOCTL_ARGS)
329 {
330 struct drm_version *version = data;
331 int err;
332
333 version->version_major = dev->driver->major;
334 version->version_minor = dev->driver->minor;
335 version->version_patchlevel = dev->driver->patchlevel;
336 err = drm_copy_field(version->name, &version->name_len,
337 dev->driver->name);
338 if (!err)
339 err = drm_copy_field(version->date, &version->date_len,
340 dev->driver->date);
341 if (!err)
342 err = drm_copy_field(version->desc, &version->desc_len,
343 dev->driver->desc);
344
345 return err;
346 }
347
348 /**
349 * Called whenever a process performs an ioctl on /dev/drm.
350 *
351 * \return zero on success or negative number on failure.
352 *
353 * Looks up the ioctl function in the ::ioctls table, checking for root
354 * previleges if so required, and dispatches to the respective function.
355 */
drm_ioctl(dev_t dev_id,struct drm_file * file_priv,int cmd,intptr_t arg,int mode,cred_t * credp)356 int drm_ioctl(dev_t dev_id, struct drm_file *file_priv,
357 int cmd, intptr_t arg, int mode, cred_t *credp)
358 {
359 struct drm_device *dev = file_priv->minor->dev;
360 struct drm_ioctl_desc *ioctl;
361 drm_ioctl_t *func;
362 unsigned int nr = DRM_IOCTL_NR(cmd);
363 int retcode = -EINVAL;
364 char stack_kdata[128];
365 char *kdata = NULL;
366 unsigned int usize, asize;
367
368 atomic_inc(&dev->ioctl_count);
369 atomic_inc(&dev->counts[_DRM_STAT_IOCTLS]);
370 ++file_priv->ioctl_count;
371
372 if ((nr >= DRM_CORE_IOCTL_COUNT) &&
373 ((nr < DRM_COMMAND_BASE) || (nr >= DRM_COMMAND_END)))
374 goto err_i1;
375 if ((nr >= DRM_COMMAND_BASE) && (nr < DRM_COMMAND_END) &&
376 (nr < DRM_COMMAND_BASE + dev->driver->num_ioctls)) {
377 ioctl = &dev->driver->ioctls[nr - DRM_COMMAND_BASE];
378 usize = asize = _IOC_SIZE(cmd);
379 cmd = ioctl->cmd;
380 }
381 else if ((nr >= DRM_COMMAND_END) || (nr < DRM_COMMAND_BASE)) {
382 ioctl = &drm_ioctls[nr];
383 cmd = ioctl->cmd;
384 usize = asize = _IOC_SIZE(cmd);
385 } else
386 goto err_i1;
387
388 /* Do not trust userspace, use our own definition */
389 func = ioctl->func;
390 /* is there a local override? */
391 if ((nr == DRM_IOCTL_NR(DRM_IOCTL_DMA)) && dev->driver->dma_ioctl)
392 func = dev->driver->dma_ioctl;
393
394 if (!func) {
395 DRM_DEBUG("no function\n");
396 retcode = -EINVAL;
397 } else if (((ioctl->flags & DRM_ROOT_ONLY) && !DRM_SUSER(credp)) ||
398 ((ioctl->flags & DRM_AUTH) && !file_priv->authenticated) ||
399 ((ioctl->flags & DRM_MASTER) && !file_priv->is_master) ||
400 (!(ioctl->flags & DRM_CONTROL_ALLOW) && (file_priv->minor->type == DRM_MINOR_CONTROL))) {
401 retcode = -EACCES;
402 } else {
403 if (cmd & (IOC_IN | IOC_OUT)) {
404 if (asize <= sizeof(stack_kdata)) {
405 kdata = stack_kdata;
406 } else {
407 kdata = kmalloc(asize, GFP_KERNEL);
408 if (!kdata) {
409 retcode = -ENOMEM;
410 goto err_i1;
411 }
412 }
413 if (asize > usize)
414 (void) memset(kdata + usize, 0, asize - usize);
415 }
416
417 if (cmd & IOC_IN) {
418 #ifdef _MULTI_DATAMODEL
419 if (ddi_model_convert_from(mode & FMODELS) == DDI_MODEL_ILP32 && ioctl->copyin32) {
420 if (ioctl->copyin32((void*)kdata, (void*)arg)) {
421 retcode = -EFAULT;
422 goto err_i1;
423 }
424 } else {
425 #endif
426 if (DRM_COPY_FROM_USER(kdata, (void __user *)arg,
427 _IOC_SIZE(cmd)) != 0) {
428 retcode = -EFAULT;
429 goto err_i1;
430 }
431 #ifdef _MULTI_DATAMODEL
432 }
433 #endif
434 }
435 retcode = func(dev_id, dev, kdata, file_priv, mode, credp);
436
437 if (cmd & IOC_OUT) {
438 #ifdef _MULTI_DATAMODEL
439 if (ddi_model_convert_from(mode & FMODELS) == DDI_MODEL_ILP32 && ioctl->copyout32) {
440 if (ioctl->copyout32((void*)arg, (void*)kdata)) {
441 retcode = -EFAULT;
442 goto err_i1;
443 }
444 } else {
445 #endif
446 if (DRM_COPY_TO_USER((void __user *)arg, kdata,
447 _IOC_SIZE(cmd)) != 0)
448 retcode = -EFAULT;
449 #ifdef _MULTI_DATAMODEL
450 }
451 #endif
452 }
453 }
454
455 err_i1:
456 if (kdata && (kdata != stack_kdata))
457 kfree(kdata, asize);
458 atomic_dec(&dev->ioctl_count);
459 if (retcode)
460 DRM_DEBUG("ret = %d\n", -retcode);
461 return retcode;
462 }
463
drm_getsarea(struct drm_device * dev)464 struct drm_local_map *drm_getsarea(struct drm_device *dev)
465 {
466 struct drm_map_list *entry;
467
468 list_for_each_entry(entry, struct drm_map_list, &dev->maplist, head) {
469 if (entry->map && entry->map->type == _DRM_SHM &&
470 (entry->map->flags & _DRM_CONTAINS_LOCK)) {
471 return entry->map;
472 }
473 }
474 return NULL;
475 }
476
477 void
drm_gem_object_reference(struct drm_gem_object * obj)478 drm_gem_object_reference(struct drm_gem_object *obj)
479 {
480 kref_get(&obj->refcount);
481 }
482
483 void
drm_gem_object_unreference(struct drm_gem_object * obj)484 drm_gem_object_unreference(struct drm_gem_object *obj)
485 {
486 if (obj != NULL)
487 kref_put(&obj->refcount, drm_gem_object_free);
488 }
489
490 void
drm_gem_object_unreference_unlocked(struct drm_gem_object * obj)491 drm_gem_object_unreference_unlocked(struct drm_gem_object *obj)
492 {
493 if (obj != NULL) {
494 struct drm_device *dev = obj->dev;
495 mutex_lock(&dev->struct_mutex);
496 kref_put(&obj->refcount, drm_gem_object_free);
497 mutex_unlock(&dev->struct_mutex);
498 }
499 }
500
501 void
drm_gem_object_handle_reference(struct drm_gem_object * obj)502 drm_gem_object_handle_reference(struct drm_gem_object *obj)
503 {
504 drm_gem_object_reference(obj);
505 atomic_inc(&obj->handle_count);
506 }
507
508 void
drm_gem_object_handle_unreference(struct drm_gem_object * obj)509 drm_gem_object_handle_unreference(struct drm_gem_object *obj)
510 {
511 if (obj == NULL)
512 return;
513
514 if (atomic_read(&obj->handle_count) == 0)
515 return;
516 /*
517 * Must bump handle count first as this may be the last
518 * ref, in which case the object would disappear before we
519 * checked for a name
520 */
521 if (atomic_dec_and_test(&obj->handle_count))
522 drm_gem_object_handle_free(obj);
523 drm_gem_object_unreference(obj);
524 }
525
526 void
drm_gem_object_handle_unreference_unlocked(struct drm_gem_object * obj)527 drm_gem_object_handle_unreference_unlocked(struct drm_gem_object *obj)
528 {
529 if (obj == NULL)
530 return;
531
532 if (atomic_read(&obj->handle_count) == 0)
533 return;
534
535 /*
536 * Must bump handle count first as this may be the last
537 * ref, in which case the object would disappear before we
538 * checked for a name
539 */
540
541 if (atomic_dec_and_test(&obj->handle_count))
542 drm_gem_object_handle_free(obj);
543 drm_gem_object_unreference_unlocked(obj);
544 }
545
546
547 /*
548 * PCI bus specific error callback
549 */
550 /* ARGSUSED */
551 int
drm_fm_error_cb(dev_info_t * dip,ddi_fm_error_t * err,const void * impl)552 drm_fm_error_cb(
553 dev_info_t *dip,
554 ddi_fm_error_t *err,
555 const void *impl)
556 {
557
558 pci_ereport_post(dip, err, NULL);
559
560 return (err->fme_status);
561 }
562
563 void
drm_fm_init(struct drm_device * dev)564 drm_fm_init(struct drm_device *dev)
565 {
566 dev_info_t *dip = dev->devinfo;
567 if (dev->drm_fm_cap) {
568 /* we do not care the iblk cookie */
569 ddi_fm_init(dip, &dev->drm_fm_cap, NULL);
570
571 /*
572 * Initialize pci ereport capabilities if ereport capable
573 */
574 if (DDI_FM_EREPORT_CAP(dev->drm_fm_cap) ||
575 DDI_FM_ERRCB_CAP(dev->drm_fm_cap)) {
576 pci_ereport_setup(dip);
577 }
578
579 /*
580 * Register error callback if error callback capable
581 */
582 if (DDI_FM_ERRCB_CAP(dev->drm_fm_cap)) {
583 ddi_fm_handler_register(dip,
584 drm_fm_error_cb, (void*) dev);
585 }
586 }
587 }
588
589 void
drm_fm_fini(struct drm_device * dev)590 drm_fm_fini(struct drm_device *dev)
591 {
592 dev_info_t *dip = dev->devinfo;
593 if (dev->drm_fm_cap) {
594 if (DDI_FM_EREPORT_CAP(dev->drm_fm_cap) ||
595 DDI_FM_ERRCB_CAP(dev->drm_fm_cap)) {
596 pci_ereport_teardown(dip);
597 }
598
599 if (DDI_FM_ERRCB_CAP(dev->drm_fm_cap)) {
600 ddi_fm_handler_unregister(dip);
601 }
602
603 ddi_fm_fini(dip);
604 }
605 }
606
607 /*
608 * report a device error.
609 * detail - DDI_FM_DEVICE_*
610 */
611 void
drm_fm_ereport(struct drm_device * dev,char * detail)612 drm_fm_ereport(
613 struct drm_device *dev,
614 char *detail)
615 {
616 uint64_t ena;
617 char buf[FM_MAX_CLASS];
618 dev_info_t *dip = dev->devinfo;
619
620 if (DDI_FM_EREPORT_CAP(dev->drm_fm_cap)) {
621
622 (void) snprintf(buf, FM_MAX_CLASS, "%s.%s", DDI_FM_DEVICE,
623 detail);
624
625 ena = fm_ena_generate(0, FM_ENA_FMT1);
626
627 ddi_fm_ereport_post(dip, buf, ena, DDI_NOSLEEP,
628 FM_VERSION, DATA_TYPE_UINT8, FM_EREPORT_VERS0, NULL);
629 }
630 }
631
632 /*
633 * Check PIO Access error, like register access.
634 */
635 int
drm_check_acc_handle(struct drm_device * dev,ddi_acc_handle_t handle)636 drm_check_acc_handle(
637 struct drm_device *dev,
638 ddi_acc_handle_t handle)
639 {
640 ddi_fm_error_t de;
641
642 if (!DDI_FM_ACC_ERR_CAP(dev->drm_fm_cap)) {
643
644 return (DDI_FM_OK);
645
646 }
647
648 ddi_fm_acc_err_get(handle, &de, DDI_FME_VERSION);
649 ddi_fm_acc_err_clear(handle, DDI_FME_VERSION);
650
651 return (de.fme_status);
652
653 }
654
655 /*
656 * Check DMA Access error.
657 */
658 int
drm_check_dma_handle(struct drm_device * dev,ddi_dma_handle_t handle)659 drm_check_dma_handle(
660 struct drm_device *dev,
661 ddi_dma_handle_t handle)
662 {
663 ddi_fm_error_t de;
664
665 if (!DDI_FM_DMA_ERR_CAP(dev->drm_fm_cap)) {
666
667 return (DDI_FM_OK);
668
669 }
670
671 ddi_fm_dma_err_get(handle, &de, DDI_FME_VERSION);
672 ddi_fm_dma_err_clear(handle, DDI_FME_VERSION);
673
674 return (de.fme_status);
675
676 }
677