1 | /* $NetBSD: drm_drv.c,v 1.17 2015/11/09 22:04:53 jmcneill Exp $ */ |
2 | |
3 | /*- |
4 | * Copyright (c) 2013 The NetBSD Foundation, Inc. |
5 | * All rights reserved. |
6 | * |
7 | * This code is derived from software contributed to The NetBSD Foundation |
8 | * by Taylor R. Campbell. |
9 | * |
10 | * Redistribution and use in source and binary forms, with or without |
11 | * modification, are permitted provided that the following conditions |
12 | * are met: |
13 | * 1. Redistributions of source code must retain the above copyright |
14 | * notice, this list of conditions and the following disclaimer. |
15 | * 2. Redistributions in binary form must reproduce the above copyright |
16 | * notice, this list of conditions and the following disclaimer in the |
17 | * documentation and/or other materials provided with the distribution. |
18 | * |
19 | * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS |
20 | * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED |
21 | * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR |
22 | * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS |
23 | * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR |
24 | * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF |
25 | * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS |
26 | * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN |
27 | * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) |
28 | * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE |
29 | * POSSIBILITY OF SUCH DAMAGE. |
30 | */ |
31 | |
32 | #include <sys/cdefs.h> |
33 | __KERNEL_RCSID(0, "$NetBSD: drm_drv.c,v 1.17 2015/11/09 22:04:53 jmcneill Exp $" ); |
34 | |
35 | #include <sys/param.h> |
36 | #include <sys/types.h> |
37 | #include <sys/conf.h> |
38 | #include <sys/device.h> |
39 | #include <sys/file.h> |
40 | #include <sys/filedesc.h> |
41 | #include <sys/ioccom.h> |
42 | #include <sys/kauth.h> |
43 | #ifndef _MODULE |
44 | /* XXX Mega-kludge because modules are broken. */ |
45 | #include <sys/once.h> |
46 | #endif |
47 | #include <sys/pmf.h> |
48 | #include <sys/poll.h> |
49 | #ifndef _MODULE |
50 | #include <sys/reboot.h> /* XXX drm_init kludge */ |
51 | #endif |
52 | #include <sys/select.h> |
53 | |
54 | #include <uvm/uvm_extern.h> |
55 | |
56 | #include <linux/err.h> |
57 | |
58 | #include <linux/pm.h> |
59 | |
60 | #include <drm/drmP.h> |
61 | |
62 | static dev_type_open(drm_open); |
63 | |
64 | static int drm_firstopen(struct drm_device *); |
65 | |
66 | static int drm_close(struct file *); |
67 | static int drm_read(struct file *, off_t *, struct uio *, kauth_cred_t, |
68 | int); |
69 | static int drm_dequeue_event(struct drm_file *, size_t, |
70 | struct drm_pending_event **, int); |
71 | static int drm_poll(struct file *, int); |
72 | static int drm_kqfilter(struct file *, struct knote *); |
73 | static int drm_stat(struct file *, struct stat *); |
74 | static int drm_ioctl(struct file *, unsigned long, void *); |
75 | static int drm_fop_mmap(struct file *, off_t *, size_t, int, int *, int *, |
76 | struct uvm_object **, int *); |
77 | static int drm_version_string(char *, size_t *, const char *); |
78 | static paddr_t drm_mmap(dev_t, off_t, int); |
79 | |
80 | static drm_ioctl_t drm_version; |
81 | |
82 | #define DRM_IOCTL_DEF(IOCTL, FUNC, FLAGS) \ |
83 | [DRM_IOCTL_NR(IOCTL)] = { \ |
84 | .cmd = (IOCTL), \ |
85 | .flags = (FLAGS), \ |
86 | .func = (FUNC), \ |
87 | .cmd_drv = 0, \ |
88 | } |
89 | |
90 | #if __OS_HAS_AGP |
91 | /* XXX Kludge for AGP. */ |
92 | static drm_ioctl_t drm_agp_acquire_hook_ioctl; |
93 | static drm_ioctl_t drm_agp_release_hook_ioctl; |
94 | static drm_ioctl_t drm_agp_enable_hook_ioctl; |
95 | static drm_ioctl_t drm_agp_info_hook_ioctl; |
96 | static drm_ioctl_t drm_agp_alloc_hook_ioctl; |
97 | static drm_ioctl_t drm_agp_free_hook_ioctl; |
98 | static drm_ioctl_t drm_agp_bind_hook_ioctl; |
99 | static drm_ioctl_t drm_agp_unbind_hook_ioctl; |
100 | |
101 | #define drm_agp_acquire_ioctl drm_agp_acquire_hook_ioctl |
102 | #define drm_agp_release_ioctl drm_agp_release_hook_ioctl |
103 | #define drm_agp_enable_ioctl drm_agp_enable_hook_ioctl |
104 | #define drm_agp_info_ioctl drm_agp_info_hook_ioctl |
105 | #define drm_agp_alloc_ioctl drm_agp_alloc_hook_ioctl |
106 | #define drm_agp_free_ioctl drm_agp_free_hook_ioctl |
107 | #define drm_agp_bind_ioctl drm_agp_bind_hook_ioctl |
108 | #define drm_agp_unbind_ioctl drm_agp_unbind_hook_ioctl |
109 | #endif |
110 | |
111 | /* Table copied verbatim from dist/drm/drm_drv.c. */ |
112 | static const struct drm_ioctl_desc drm_ioctls[] = { |
113 | DRM_IOCTL_DEF(DRM_IOCTL_VERSION, drm_version, DRM_UNLOCKED|DRM_RENDER_ALLOW), |
114 | DRM_IOCTL_DEF(DRM_IOCTL_GET_UNIQUE, drm_getunique, 0), |
115 | DRM_IOCTL_DEF(DRM_IOCTL_GET_MAGIC, drm_getmagic, 0), |
116 | DRM_IOCTL_DEF(DRM_IOCTL_IRQ_BUSID, drm_irq_by_busid, DRM_MASTER|DRM_ROOT_ONLY), |
117 | DRM_IOCTL_DEF(DRM_IOCTL_GET_MAP, drm_getmap, DRM_UNLOCKED), |
118 | DRM_IOCTL_DEF(DRM_IOCTL_GET_CLIENT, drm_getclient, DRM_UNLOCKED), |
119 | DRM_IOCTL_DEF(DRM_IOCTL_GET_STATS, drm_getstats, DRM_UNLOCKED), |
120 | DRM_IOCTL_DEF(DRM_IOCTL_GET_CAP, drm_getcap, DRM_UNLOCKED|DRM_RENDER_ALLOW), |
121 | DRM_IOCTL_DEF(DRM_IOCTL_SET_CLIENT_CAP, drm_setclientcap, 0), |
122 | DRM_IOCTL_DEF(DRM_IOCTL_SET_VERSION, drm_setversion, DRM_MASTER), |
123 | |
124 | DRM_IOCTL_DEF(DRM_IOCTL_SET_UNIQUE, drm_setunique, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY), |
125 | DRM_IOCTL_DEF(DRM_IOCTL_BLOCK, drm_noop, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY), |
126 | DRM_IOCTL_DEF(DRM_IOCTL_UNBLOCK, drm_noop, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY), |
127 | DRM_IOCTL_DEF(DRM_IOCTL_AUTH_MAGIC, drm_authmagic, DRM_AUTH|DRM_MASTER), |
128 | |
129 | DRM_IOCTL_DEF(DRM_IOCTL_ADD_MAP, drm_addmap_ioctl, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY), |
130 | DRM_IOCTL_DEF(DRM_IOCTL_RM_MAP, drm_rmmap_ioctl, DRM_AUTH), |
131 | |
132 | DRM_IOCTL_DEF(DRM_IOCTL_SET_SAREA_CTX, drm_setsareactx, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY), |
133 | DRM_IOCTL_DEF(DRM_IOCTL_GET_SAREA_CTX, drm_getsareactx, DRM_AUTH), |
134 | |
135 | DRM_IOCTL_DEF(DRM_IOCTL_SET_MASTER, drm_setmaster_ioctl, DRM_ROOT_ONLY), |
136 | DRM_IOCTL_DEF(DRM_IOCTL_DROP_MASTER, drm_dropmaster_ioctl, DRM_ROOT_ONLY), |
137 | |
138 | DRM_IOCTL_DEF(DRM_IOCTL_ADD_CTX, drm_addctx, DRM_AUTH|DRM_ROOT_ONLY), |
139 | DRM_IOCTL_DEF(DRM_IOCTL_RM_CTX, drm_rmctx, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY), |
140 | DRM_IOCTL_DEF(DRM_IOCTL_MOD_CTX, drm_noop, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY), |
141 | DRM_IOCTL_DEF(DRM_IOCTL_GET_CTX, drm_getctx, DRM_AUTH), |
142 | DRM_IOCTL_DEF(DRM_IOCTL_SWITCH_CTX, drm_switchctx, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY), |
143 | DRM_IOCTL_DEF(DRM_IOCTL_NEW_CTX, drm_newctx, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY), |
144 | DRM_IOCTL_DEF(DRM_IOCTL_RES_CTX, drm_resctx, DRM_AUTH), |
145 | |
146 | DRM_IOCTL_DEF(DRM_IOCTL_ADD_DRAW, drm_noop, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY), |
147 | DRM_IOCTL_DEF(DRM_IOCTL_RM_DRAW, drm_noop, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY), |
148 | |
149 | DRM_IOCTL_DEF(DRM_IOCTL_LOCK, drm_lock, DRM_AUTH), |
150 | DRM_IOCTL_DEF(DRM_IOCTL_UNLOCK, drm_unlock, DRM_AUTH), |
151 | |
152 | DRM_IOCTL_DEF(DRM_IOCTL_FINISH, drm_noop, DRM_AUTH), |
153 | |
154 | DRM_IOCTL_DEF(DRM_IOCTL_ADD_BUFS, drm_addbufs, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY), |
155 | DRM_IOCTL_DEF(DRM_IOCTL_MARK_BUFS, drm_markbufs, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY), |
156 | DRM_IOCTL_DEF(DRM_IOCTL_INFO_BUFS, drm_infobufs, DRM_AUTH), |
157 | DRM_IOCTL_DEF(DRM_IOCTL_MAP_BUFS, drm_mapbufs, DRM_AUTH), |
158 | DRM_IOCTL_DEF(DRM_IOCTL_FREE_BUFS, drm_freebufs, DRM_AUTH), |
159 | DRM_IOCTL_DEF(DRM_IOCTL_DMA, drm_dma_ioctl, DRM_AUTH), |
160 | |
161 | DRM_IOCTL_DEF(DRM_IOCTL_CONTROL, drm_control, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY), |
162 | |
163 | #if __OS_HAS_AGP |
164 | DRM_IOCTL_DEF(DRM_IOCTL_AGP_ACQUIRE, drm_agp_acquire_ioctl, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY), |
165 | DRM_IOCTL_DEF(DRM_IOCTL_AGP_RELEASE, drm_agp_release_ioctl, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY), |
166 | DRM_IOCTL_DEF(DRM_IOCTL_AGP_ENABLE, drm_agp_enable_ioctl, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY), |
167 | DRM_IOCTL_DEF(DRM_IOCTL_AGP_INFO, drm_agp_info_ioctl, DRM_AUTH), |
168 | DRM_IOCTL_DEF(DRM_IOCTL_AGP_ALLOC, drm_agp_alloc_ioctl, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY), |
169 | DRM_IOCTL_DEF(DRM_IOCTL_AGP_FREE, drm_agp_free_ioctl, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY), |
170 | DRM_IOCTL_DEF(DRM_IOCTL_AGP_BIND, drm_agp_bind_ioctl, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY), |
171 | DRM_IOCTL_DEF(DRM_IOCTL_AGP_UNBIND, drm_agp_unbind_ioctl, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY), |
172 | #endif |
173 | |
174 | DRM_IOCTL_DEF(DRM_IOCTL_SG_ALLOC, drm_sg_alloc, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY), |
175 | DRM_IOCTL_DEF(DRM_IOCTL_SG_FREE, drm_sg_free, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY), |
176 | |
177 | DRM_IOCTL_DEF(DRM_IOCTL_WAIT_VBLANK, drm_wait_vblank, DRM_UNLOCKED), |
178 | |
179 | DRM_IOCTL_DEF(DRM_IOCTL_MODESET_CTL, drm_modeset_ctl, 0), |
180 | |
181 | DRM_IOCTL_DEF(DRM_IOCTL_UPDATE_DRAW, drm_noop, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY), |
182 | |
183 | DRM_IOCTL_DEF(DRM_IOCTL_GEM_CLOSE, drm_gem_close_ioctl, DRM_UNLOCKED|DRM_RENDER_ALLOW), |
184 | DRM_IOCTL_DEF(DRM_IOCTL_GEM_FLINK, drm_gem_flink_ioctl, DRM_AUTH|DRM_UNLOCKED), |
185 | DRM_IOCTL_DEF(DRM_IOCTL_GEM_OPEN, drm_gem_open_ioctl, DRM_AUTH|DRM_UNLOCKED), |
186 | |
187 | DRM_IOCTL_DEF(DRM_IOCTL_MODE_GETRESOURCES, drm_mode_getresources, DRM_CONTROL_ALLOW|DRM_UNLOCKED), |
188 | |
189 | #ifndef __NetBSD__ /* XXX drm prime */ |
190 | DRM_IOCTL_DEF(DRM_IOCTL_PRIME_HANDLE_TO_FD, drm_prime_handle_to_fd_ioctl, DRM_AUTH|DRM_UNLOCKED|DRM_RENDER_ALLOW), |
191 | DRM_IOCTL_DEF(DRM_IOCTL_PRIME_FD_TO_HANDLE, drm_prime_fd_to_handle_ioctl, DRM_AUTH|DRM_UNLOCKED|DRM_RENDER_ALLOW), |
192 | #endif |
193 | |
194 | DRM_IOCTL_DEF(DRM_IOCTL_MODE_GETPLANERESOURCES, drm_mode_getplane_res, DRM_CONTROL_ALLOW|DRM_UNLOCKED), |
195 | DRM_IOCTL_DEF(DRM_IOCTL_MODE_GETCRTC, drm_mode_getcrtc, DRM_CONTROL_ALLOW|DRM_UNLOCKED), |
196 | DRM_IOCTL_DEF(DRM_IOCTL_MODE_SETCRTC, drm_mode_setcrtc, DRM_MASTER|DRM_CONTROL_ALLOW|DRM_UNLOCKED), |
197 | DRM_IOCTL_DEF(DRM_IOCTL_MODE_GETPLANE, drm_mode_getplane, DRM_CONTROL_ALLOW|DRM_UNLOCKED), |
198 | DRM_IOCTL_DEF(DRM_IOCTL_MODE_SETPLANE, drm_mode_setplane, DRM_MASTER|DRM_CONTROL_ALLOW|DRM_UNLOCKED), |
199 | DRM_IOCTL_DEF(DRM_IOCTL_MODE_CURSOR, drm_mode_cursor_ioctl, DRM_MASTER|DRM_CONTROL_ALLOW|DRM_UNLOCKED), |
200 | DRM_IOCTL_DEF(DRM_IOCTL_MODE_GETGAMMA, drm_mode_gamma_get_ioctl, DRM_UNLOCKED), |
201 | DRM_IOCTL_DEF(DRM_IOCTL_MODE_SETGAMMA, drm_mode_gamma_set_ioctl, DRM_MASTER|DRM_UNLOCKED), |
202 | DRM_IOCTL_DEF(DRM_IOCTL_MODE_GETENCODER, drm_mode_getencoder, DRM_CONTROL_ALLOW|DRM_UNLOCKED), |
203 | DRM_IOCTL_DEF(DRM_IOCTL_MODE_GETCONNECTOR, drm_mode_getconnector, DRM_CONTROL_ALLOW|DRM_UNLOCKED), |
204 | DRM_IOCTL_DEF(DRM_IOCTL_MODE_ATTACHMODE, drm_noop, DRM_MASTER|DRM_CONTROL_ALLOW|DRM_UNLOCKED), |
205 | DRM_IOCTL_DEF(DRM_IOCTL_MODE_DETACHMODE, drm_noop, DRM_MASTER|DRM_CONTROL_ALLOW|DRM_UNLOCKED), |
206 | DRM_IOCTL_DEF(DRM_IOCTL_MODE_GETPROPERTY, drm_mode_getproperty_ioctl, DRM_CONTROL_ALLOW|DRM_UNLOCKED), |
207 | DRM_IOCTL_DEF(DRM_IOCTL_MODE_SETPROPERTY, drm_mode_connector_property_set_ioctl, DRM_MASTER|DRM_CONTROL_ALLOW|DRM_UNLOCKED), |
208 | DRM_IOCTL_DEF(DRM_IOCTL_MODE_GETPROPBLOB, drm_mode_getblob_ioctl, DRM_CONTROL_ALLOW|DRM_UNLOCKED), |
209 | DRM_IOCTL_DEF(DRM_IOCTL_MODE_GETFB, drm_mode_getfb, DRM_CONTROL_ALLOW|DRM_UNLOCKED), |
210 | DRM_IOCTL_DEF(DRM_IOCTL_MODE_ADDFB, drm_mode_addfb, DRM_CONTROL_ALLOW|DRM_UNLOCKED), |
211 | DRM_IOCTL_DEF(DRM_IOCTL_MODE_ADDFB2, drm_mode_addfb2, DRM_CONTROL_ALLOW|DRM_UNLOCKED), |
212 | DRM_IOCTL_DEF(DRM_IOCTL_MODE_RMFB, drm_mode_rmfb, DRM_CONTROL_ALLOW|DRM_UNLOCKED), |
213 | DRM_IOCTL_DEF(DRM_IOCTL_MODE_PAGE_FLIP, drm_mode_page_flip_ioctl, DRM_MASTER|DRM_CONTROL_ALLOW|DRM_UNLOCKED), |
214 | DRM_IOCTL_DEF(DRM_IOCTL_MODE_DIRTYFB, drm_mode_dirtyfb_ioctl, DRM_MASTER|DRM_CONTROL_ALLOW|DRM_UNLOCKED), |
215 | DRM_IOCTL_DEF(DRM_IOCTL_MODE_CREATE_DUMB, drm_mode_create_dumb_ioctl, DRM_CONTROL_ALLOW|DRM_UNLOCKED), |
216 | DRM_IOCTL_DEF(DRM_IOCTL_MODE_MAP_DUMB, drm_mode_mmap_dumb_ioctl, DRM_CONTROL_ALLOW|DRM_UNLOCKED), |
217 | DRM_IOCTL_DEF(DRM_IOCTL_MODE_DESTROY_DUMB, drm_mode_destroy_dumb_ioctl, DRM_CONTROL_ALLOW|DRM_UNLOCKED), |
218 | DRM_IOCTL_DEF(DRM_IOCTL_MODE_OBJ_GETPROPERTIES, drm_mode_obj_get_properties_ioctl, DRM_CONTROL_ALLOW|DRM_UNLOCKED), |
219 | DRM_IOCTL_DEF(DRM_IOCTL_MODE_OBJ_SETPROPERTY, drm_mode_obj_set_property_ioctl, DRM_MASTER|DRM_CONTROL_ALLOW|DRM_UNLOCKED), |
220 | DRM_IOCTL_DEF(DRM_IOCTL_MODE_CURSOR2, drm_mode_cursor2_ioctl, DRM_MASTER|DRM_CONTROL_ALLOW|DRM_UNLOCKED), |
221 | }; |
222 | |
223 | const struct cdevsw drm_cdevsw = { |
224 | .d_open = drm_open, |
225 | .d_close = noclose, |
226 | .d_read = noread, |
227 | .d_write = nowrite, |
228 | .d_ioctl = noioctl, |
229 | .d_stop = nostop, |
230 | .d_tty = notty, |
231 | .d_poll = nopoll, |
232 | .d_mmap = drm_mmap, |
233 | .d_kqfilter = nokqfilter, |
234 | .d_discard = nodiscard, |
235 | /* XXX was D_TTY | D_NEGOFFSAFE */ |
236 | /* XXX Add D_MPSAFE some day... */ |
237 | .d_flag = D_NEGOFFSAFE, |
238 | }; |
239 | |
240 | static const struct fileops drm_fileops = { |
241 | .fo_read = drm_read, |
242 | .fo_write = fbadop_write, |
243 | .fo_ioctl = drm_ioctl, |
244 | .fo_fcntl = fnullop_fcntl, |
245 | .fo_poll = drm_poll, |
246 | .fo_stat = drm_stat, |
247 | .fo_close = drm_close, |
248 | .fo_kqfilter = drm_kqfilter, |
249 | .fo_restart = fnullop_restart, |
250 | .fo_mmap = drm_fop_mmap, |
251 | }; |
252 | |
253 | static int |
254 | drm_open(dev_t d, int flags, int fmt, struct lwp *l) |
255 | { |
256 | struct drm_minor *dminor; |
257 | struct drm_device *dev; |
258 | bool firstopen, lastclose; |
259 | int fd; |
260 | struct file *fp; |
261 | int error; |
262 | extern int drm_guarantee_initialized(void); |
263 | |
264 | error = drm_guarantee_initialized(); |
265 | if (error) |
266 | goto fail0; |
267 | |
268 | if (flags & O_EXCL) { |
269 | error = EBUSY; |
270 | goto fail0; |
271 | } |
272 | |
273 | dminor = drm_minor_acquire(minor(d)); |
274 | if (IS_ERR(dminor)) { |
275 | /* XXX errno Linux->NetBSD */ |
276 | error = -PTR_ERR(dminor); |
277 | goto fail0; |
278 | } |
279 | dev = dminor->dev; |
280 | if (dev->switch_power_state != DRM_SWITCH_POWER_ON) { |
281 | error = EINVAL; |
282 | goto fail1; |
283 | } |
284 | |
285 | spin_lock(&dev->count_lock); |
286 | if (dev->open_count == INT_MAX) { |
287 | spin_unlock(&dev->count_lock); |
288 | error = EBUSY; |
289 | goto fail1; |
290 | } |
291 | firstopen = (dev->open_count == 0); |
292 | dev->open_count++; |
293 | spin_unlock(&dev->count_lock); |
294 | |
295 | if (firstopen) { |
296 | /* XXX errno Linux->NetBSD */ |
297 | error = drm_firstopen(dev); |
298 | if (error) |
299 | goto fail2; |
300 | } |
301 | |
302 | error = fd_allocfile(&fp, &fd); |
303 | if (error) |
304 | goto fail2; |
305 | |
306 | struct drm_file *const file = kmem_zalloc(sizeof(*file), KM_SLEEP); |
307 | /* XXX errno Linux->NetBSD */ |
308 | error = -drm_open_file(file, fp, dminor); |
309 | if (error) |
310 | goto fail3; |
311 | |
312 | error = fd_clone(fp, fd, flags, &drm_fileops, file); |
313 | KASSERT(error == EMOVEFD); /* XXX */ |
314 | |
315 | /* Success! (But error has to be EMOVEFD, not 0.) */ |
316 | return error; |
317 | |
318 | fail3: kmem_free(file, sizeof(*file)); |
319 | fd_abort(curproc, fp, fd); |
320 | fail2: spin_lock(&dev->count_lock); |
321 | KASSERT(0 < dev->open_count); |
322 | --dev->open_count; |
323 | lastclose = (dev->open_count == 0); |
324 | spin_unlock(&dev->count_lock); |
325 | if (lastclose) |
326 | (void)drm_lastclose(dev); |
327 | fail1: drm_minor_release(dminor); |
328 | fail0: KASSERT(error); |
329 | return error; |
330 | } |
331 | |
332 | static int |
333 | drm_close(struct file *fp) |
334 | { |
335 | struct drm_file *const file = fp->f_data; |
336 | struct drm_minor *const dminor = file->minor; |
337 | struct drm_device *const dev = dminor->dev; |
338 | bool lastclose; |
339 | |
340 | drm_close_file(file); |
341 | kmem_free(file, sizeof(*file)); |
342 | |
343 | spin_lock(&dev->count_lock); |
344 | KASSERT(0 < dev->open_count); |
345 | --dev->open_count; |
346 | lastclose = (dev->open_count == 0); |
347 | spin_unlock(&dev->count_lock); |
348 | |
349 | if (lastclose) |
350 | (void)drm_lastclose(dev); |
351 | |
352 | drm_minor_release(dminor); |
353 | |
354 | return 0; |
355 | } |
356 | |
357 | static int |
358 | drm_firstopen(struct drm_device *dev) |
359 | { |
360 | int ret; |
361 | |
362 | if (drm_core_check_feature(dev, DRIVER_MODESET)) |
363 | return 0; |
364 | |
365 | if (dev->driver->firstopen) { |
366 | ret = (*dev->driver->firstopen)(dev); |
367 | if (ret) |
368 | goto fail0; |
369 | } |
370 | |
371 | ret = drm_legacy_dma_setup(dev); |
372 | if (ret) |
373 | goto fail1; |
374 | |
375 | return 0; |
376 | |
377 | fail2: __unused |
378 | drm_legacy_dma_takedown(dev); |
379 | fail1: if (dev->driver->lastclose) |
380 | (*dev->driver->lastclose)(dev); |
381 | fail0: KASSERT(ret); |
382 | return ret; |
383 | } |
384 | |
385 | int |
386 | drm_lastclose(struct drm_device *dev) |
387 | { |
388 | struct drm_vma_entry *vma, *vma_temp; |
389 | |
390 | /* XXX Order is sketchy here... */ |
391 | if (dev->driver->lastclose) |
392 | (*dev->driver->lastclose)(dev); |
393 | if (dev->irq_enabled && !drm_core_check_feature(dev, DRIVER_MODESET)) |
394 | drm_irq_uninstall(dev); |
395 | |
396 | mutex_lock(&dev->struct_mutex); |
397 | if (dev->agp) |
398 | drm_agp_clear_hook(dev); |
399 | drm_legacy_sg_cleanup(dev); |
400 | list_for_each_entry_safe(vma, vma_temp, &dev->vmalist, head) { |
401 | list_del(&vma->head); |
402 | kfree(vma); |
403 | } |
404 | drm_legacy_dma_takedown(dev); |
405 | mutex_unlock(&dev->struct_mutex); |
406 | |
407 | if (!drm_core_check_feature(dev, DRIVER_MODESET)) { |
408 | dev->sigdata.lock = NULL; |
409 | dev->context_flag = 0; |
410 | dev->last_context = 0; |
411 | dev->if_version = 0; |
412 | } |
413 | |
414 | return 0; |
415 | } |
416 | |
417 | static int |
418 | drm_read(struct file *fp, off_t *off, struct uio *uio, kauth_cred_t cred, |
419 | int flags) |
420 | { |
421 | struct drm_file *const file = fp->f_data; |
422 | struct drm_pending_event *event; |
423 | bool first; |
424 | int error = 0; |
425 | |
426 | for (first = true; ; first = false) { |
427 | int f = 0; |
428 | |
429 | if (!first || ISSET(fp->f_flag, FNONBLOCK)) |
430 | f |= FNONBLOCK; |
431 | |
432 | /* XXX errno Linux->NetBSD */ |
433 | error = -drm_dequeue_event(file, uio->uio_resid, &event, f); |
434 | if (error) { |
435 | if ((error == EWOULDBLOCK) && !first) |
436 | error = 0; |
437 | break; |
438 | } |
439 | if (event == NULL) |
440 | break; |
441 | error = uiomove(event->event, event->event->length, uio); |
442 | if (error) /* XXX Requeue the event? */ |
443 | break; |
444 | (*event->destroy)(event); |
445 | } |
446 | |
447 | /* Success! */ |
448 | return error; |
449 | } |
450 | |
451 | static int |
452 | drm_dequeue_event(struct drm_file *file, size_t max_length, |
453 | struct drm_pending_event **eventp, int flags) |
454 | { |
455 | struct drm_device *const dev = file->minor->dev; |
456 | struct drm_pending_event *event = NULL; |
457 | unsigned long irqflags; |
458 | int ret = 0; |
459 | |
460 | spin_lock_irqsave(&dev->event_lock, irqflags); |
461 | |
462 | if (ISSET(flags, FNONBLOCK)) { |
463 | if (list_empty(&file->event_list)) |
464 | ret = -EWOULDBLOCK; |
465 | } else { |
466 | DRM_SPIN_WAIT_UNTIL(ret, &file->event_wait, &dev->event_lock, |
467 | !list_empty(&file->event_list)); |
468 | } |
469 | if (ret) |
470 | goto out; |
471 | |
472 | event = list_first_entry(&file->event_list, struct drm_pending_event, |
473 | link); |
474 | if (event->event->length > max_length) { |
475 | /* Event is too large, can't return it. */ |
476 | event = NULL; |
477 | ret = 0; |
478 | goto out; |
479 | } |
480 | |
481 | file->event_space += event->event->length; |
482 | list_del(&event->link); |
483 | |
484 | out: spin_unlock_irqrestore(&dev->event_lock, irqflags); |
485 | *eventp = event; |
486 | return ret; |
487 | } |
488 | |
489 | static int |
490 | drm_poll(struct file *fp __unused, int events __unused) |
491 | { |
492 | struct drm_file *const file = fp->f_data; |
493 | struct drm_device *const dev = file->minor->dev; |
494 | int revents = 0; |
495 | unsigned long irqflags; |
496 | |
497 | if (!ISSET(events, (POLLIN | POLLRDNORM))) |
498 | return 0; |
499 | |
500 | spin_lock_irqsave(&dev->event_lock, irqflags); |
501 | if (list_empty(&file->event_list)) |
502 | selrecord(curlwp, &file->event_selq); |
503 | else |
504 | revents |= (events & (POLLIN | POLLRDNORM)); |
505 | spin_unlock_irqrestore(&dev->event_lock, irqflags); |
506 | |
507 | return revents; |
508 | } |
509 | |
510 | static void filt_drm_detach(struct knote *); |
511 | static int filt_drm_event(struct knote *, long); |
512 | |
513 | static const struct filterops drm_filtops = |
514 | { 1, NULL, filt_drm_detach, filt_drm_event }; |
515 | |
516 | static int |
517 | drm_kqfilter(struct file *fp, struct knote *kn) |
518 | { |
519 | struct drm_file *const file = fp->f_data; |
520 | struct drm_device *const dev = file->minor->dev; |
521 | unsigned long irqflags; |
522 | |
523 | switch (kn->kn_filter) { |
524 | case EVFILT_READ: |
525 | kn->kn_fop = &drm_filtops; |
526 | kn->kn_hook = file; |
527 | spin_lock_irqsave(&dev->event_lock, irqflags); |
528 | SLIST_INSERT_HEAD(&file->event_selq.sel_klist, kn, kn_selnext); |
529 | spin_unlock_irqrestore(&dev->event_lock, irqflags); |
530 | return 0; |
531 | case EVFILT_WRITE: |
532 | default: |
533 | return EINVAL; |
534 | } |
535 | } |
536 | |
537 | static void |
538 | filt_drm_detach(struct knote *kn) |
539 | { |
540 | struct drm_file *const file = kn->kn_hook; |
541 | struct drm_device *const dev = file->minor->dev; |
542 | unsigned long irqflags; |
543 | |
544 | spin_lock_irqsave(&dev->event_lock, irqflags); |
545 | SLIST_REMOVE(&file->event_selq.sel_klist, kn, knote, kn_selnext); |
546 | spin_unlock_irqrestore(&dev->event_lock, irqflags); |
547 | } |
548 | |
549 | static int |
550 | filt_drm_event(struct knote *kn, long hint) |
551 | { |
552 | struct drm_file *const file = kn->kn_hook; |
553 | struct drm_device *const dev = file->minor->dev; |
554 | unsigned long irqflags; |
555 | int ret; |
556 | |
557 | if (hint == NOTE_SUBMIT) |
558 | KASSERT(spin_is_locked(&dev->event_lock)); |
559 | else |
560 | spin_lock_irqsave(&dev->event_lock, irqflags); |
561 | if (list_empty(&file->event_list)) { |
562 | ret = 0; |
563 | } else { |
564 | struct drm_pending_event *const event = |
565 | list_first_entry(&file->event_list, |
566 | struct drm_pending_event, link); |
567 | kn->kn_data = event->event->length; |
568 | ret = 1; |
569 | } |
570 | if (hint == NOTE_SUBMIT) |
571 | KASSERT(spin_is_locked(&dev->event_lock)); |
572 | else |
573 | spin_unlock_irqrestore(&dev->event_lock, irqflags); |
574 | |
575 | return ret; |
576 | } |
577 | |
578 | static int |
579 | drm_stat(struct file *fp, struct stat *st) |
580 | { |
581 | struct drm_file *const file = fp->f_data; |
582 | struct drm_minor *const dminor = file->minor; |
583 | const dev_t devno = makedev(cdevsw_lookup_major(&drm_cdevsw), |
584 | 64*dminor->index + dminor->type); |
585 | |
586 | (void)memset(st, 0, sizeof(*st)); |
587 | |
588 | st->st_dev = devno; |
589 | st->st_ino = 0; /* XXX (dev,ino) uniqueness bleh */ |
590 | st->st_uid = kauth_cred_geteuid(fp->f_cred); |
591 | st->st_gid = kauth_cred_getegid(fp->f_cred); |
592 | st->st_mode = S_IFCHR; /* XXX what? */ |
593 | st->st_rdev = devno; |
594 | /* XXX what else? */ |
595 | |
596 | return 0; |
597 | } |
598 | |
599 | static int |
600 | drm_ioctl(struct file *fp, unsigned long cmd, void *data) |
601 | { |
602 | struct drm_file *const file = fp->f_data; |
603 | const unsigned int nr = DRM_IOCTL_NR(cmd); |
604 | int error; |
605 | |
606 | switch (cmd) { |
607 | case FIONBIO: |
608 | case FIOASYNC: |
609 | return 0; |
610 | |
611 | #if 0 /* XXX why? */ |
612 | case SIOCSPGRP: |
613 | case TIOCSPGRP: |
614 | case FIOSETOWN: |
615 | return fsetown(&dev->buf_pgid, cmd, data); |
616 | |
617 | case SIOCGPGRP: |
618 | case TIOCGPGRP: |
619 | case FIOGETOWN: |
620 | return fgetown(&dev->buf_pgid, cmd, data); |
621 | #endif |
622 | |
623 | default: |
624 | break; |
625 | } |
626 | |
627 | if (IOCGROUP(cmd) != DRM_IOCTL_BASE) |
628 | return EINVAL; |
629 | |
630 | KASSERT(file != NULL); |
631 | KASSERT(file->minor != NULL); |
632 | KASSERT(file->minor->dev != NULL); |
633 | struct drm_device *const dev = file->minor->dev; |
634 | const struct drm_ioctl_desc *ioctl; |
635 | |
636 | if ((DRM_COMMAND_BASE <= nr) && (nr < DRM_COMMAND_END)) { |
637 | const unsigned int driver_nr = nr - DRM_COMMAND_BASE; |
638 | if (driver_nr >= dev->driver->num_ioctls) |
639 | return EINVAL; |
640 | ioctl = &dev->driver->ioctls[driver_nr]; |
641 | } else if (nr < __arraycount(drm_ioctls)) { |
642 | ioctl = &drm_ioctls[nr]; |
643 | } else { |
644 | ioctl = NULL; |
645 | } |
646 | |
647 | if ((ioctl == NULL) || (ioctl->func == NULL)) |
648 | return EINVAL; |
649 | |
650 | /* XXX Synchronize with drm_ioctl_permit in upstream drm_drv.c. */ |
651 | if (ISSET(ioctl->flags, DRM_ROOT_ONLY) && !DRM_SUSER()) |
652 | return EACCES; |
653 | |
654 | if (ISSET(ioctl->flags, DRM_AUTH) && |
655 | (file->minor->type != DRM_MINOR_RENDER) && |
656 | !file->authenticated) |
657 | return EACCES; |
658 | |
659 | if (ISSET(ioctl->flags, DRM_MASTER) && |
660 | (file->master == NULL) && |
661 | (file->minor->type != DRM_MINOR_CONTROL)) |
662 | return EACCES; |
663 | |
664 | if (!ISSET(ioctl->flags, DRM_CONTROL_ALLOW) && |
665 | (file->minor->type == DRM_MINOR_CONTROL)) |
666 | return EACCES; |
667 | |
668 | if (!ISSET(ioctl->flags, DRM_RENDER_ALLOW) && |
669 | (file->minor->type == DRM_MINOR_RENDER)) |
670 | return EACCES; |
671 | |
672 | if (!ISSET(ioctl->flags, DRM_UNLOCKED)) |
673 | mutex_lock(&drm_global_mutex); |
674 | |
675 | /* XXX errno Linux->NetBSD */ |
676 | error = -(*ioctl->func)(dev, data, file); |
677 | |
678 | if (!ISSET(ioctl->flags, DRM_UNLOCKED)) |
679 | mutex_unlock(&drm_global_mutex); |
680 | |
681 | return error; |
682 | } |
683 | |
684 | static int |
685 | drm_fop_mmap(struct file *fp, off_t *offp, size_t len, int prot, int *flagsp, |
686 | int *advicep, struct uvm_object **uobjp, int *maxprotp) |
687 | { |
688 | struct drm_file *const file = fp->f_data; |
689 | struct drm_device *const dev = file->minor->dev; |
690 | int error; |
691 | |
692 | KASSERT(fp == file->filp); |
693 | error = (*dev->driver->mmap_object)(dev, *offp, len, prot, uobjp, |
694 | offp, file->filp); |
695 | *maxprotp = prot; |
696 | *advicep = UVM_ADV_RANDOM; |
697 | return -error; |
698 | } |
699 | |
700 | static int |
701 | drm_version_string(char *target, size_t *lenp, const char *source) |
702 | { |
703 | const size_t len = strlen(source); |
704 | const size_t trunc_len = MIN(len, *lenp); |
705 | |
706 | *lenp = len; |
707 | if ((trunc_len > 0) && (target != NULL)) |
708 | /* copyoutstr takes a buffer size, not a string length. */ |
709 | /* XXX errno NetBSD->Linux */ |
710 | return -copyoutstr(source, target, trunc_len+1, NULL); |
711 | |
712 | return 0; |
713 | } |
714 | |
715 | static int |
716 | drm_version(struct drm_device *dev, void *data, struct drm_file *file) |
717 | { |
718 | struct drm_version *v = data; |
719 | int error; |
720 | |
721 | v->version_major = dev->driver->major; |
722 | v->version_minor = dev->driver->minor; |
723 | v->version_patchlevel = dev->driver->patchlevel; |
724 | |
725 | error = drm_version_string(v->name, &v->name_len, dev->driver->name); |
726 | if (error) |
727 | goto out; |
728 | error = drm_version_string(v->date, &v->date_len, dev->driver->date); |
729 | if (error) |
730 | goto out; |
731 | error = drm_version_string(v->desc, &v->desc_len, dev->driver->desc); |
732 | if (error) |
733 | goto out; |
734 | |
735 | out: return error; |
736 | } |
737 | |
738 | static paddr_t |
739 | drm_mmap(dev_t d, off_t offset, int prot) |
740 | { |
741 | struct drm_minor *dminor; |
742 | paddr_t paddr; |
743 | |
744 | dminor = drm_minor_acquire(minor(d)); |
745 | if (IS_ERR(dminor)) |
746 | return (paddr_t)-1; |
747 | |
748 | paddr = drm_mmap_paddr(dminor->dev, offset, prot); |
749 | |
750 | drm_minor_release(dminor); |
751 | return paddr; |
752 | } |
753 | |
754 | static const struct drm_agp_hooks *volatile drm_current_agp_hooks; |
755 | |
756 | int |
757 | drm_agp_register(const struct drm_agp_hooks *hooks) |
758 | { |
759 | |
760 | membar_producer(); |
761 | if (atomic_cas_ptr(&drm_current_agp_hooks, NULL, __UNCONST(hooks)) |
762 | != NULL) |
763 | return EBUSY; |
764 | |
765 | return 0; |
766 | } |
767 | |
768 | void |
769 | drm_agp_deregister(const struct drm_agp_hooks *hooks) |
770 | { |
771 | |
772 | if (atomic_cas_ptr(&drm_current_agp_hooks, __UNCONST(hooks), NULL) |
773 | != hooks) |
774 | panic("%s: wrong hooks: %p != %p" , __func__, |
775 | hooks, drm_current_agp_hooks); |
776 | } |
777 | |
778 | static void __dead |
779 | drm_noagp_panic(struct drm_device *dev) |
780 | { |
781 | if ((dev != NULL) && |
782 | (dev->control != NULL) && |
783 | (dev->control->kdev != NULL)) |
784 | panic("%s: no agp loaded" , device_xname(dev->control->kdev)); |
785 | else |
786 | panic("drm_device %p: no agp loaded" , dev); |
787 | } |
788 | |
789 | int |
790 | drm_agp_release_hook(struct drm_device *dev) |
791 | { |
792 | const struct drm_agp_hooks *const hooks = drm_current_agp_hooks; |
793 | |
794 | if (hooks == NULL) |
795 | drm_noagp_panic(dev); |
796 | membar_consumer(); |
797 | return (*hooks->agph_release)(dev); |
798 | } |
799 | |
800 | void |
801 | drm_agp_clear_hook(struct drm_device *dev) |
802 | { |
803 | const struct drm_agp_hooks *const hooks = drm_current_agp_hooks; |
804 | |
805 | if (hooks == NULL) |
806 | drm_noagp_panic(dev); |
807 | membar_consumer(); |
808 | (*hooks->agph_clear)(dev); |
809 | } |
810 | |
811 | #if __OS_HAS_AGP |
812 | |
813 | #define DEFINE_AGP_HOOK_IOCTL(NAME, HOOK) \ |
814 | static int \ |
815 | NAME(struct drm_device *dev, void *data, struct drm_file *file) \ |
816 | { \ |
817 | const struct drm_agp_hooks *const hooks = drm_current_agp_hooks; \ |
818 | \ |
819 | if (hooks == NULL) \ |
820 | return -ENODEV; \ |
821 | membar_consumer(); \ |
822 | return (*hooks->HOOK)(dev, data, file); \ |
823 | } |
824 | |
825 | DEFINE_AGP_HOOK_IOCTL(drm_agp_acquire_hook_ioctl, agph_acquire_ioctl) |
826 | DEFINE_AGP_HOOK_IOCTL(drm_agp_release_hook_ioctl, agph_release_ioctl) |
827 | DEFINE_AGP_HOOK_IOCTL(drm_agp_enable_hook_ioctl, agph_enable_ioctl) |
828 | DEFINE_AGP_HOOK_IOCTL(drm_agp_info_hook_ioctl, agph_info_ioctl) |
829 | DEFINE_AGP_HOOK_IOCTL(drm_agp_alloc_hook_ioctl, agph_alloc_ioctl) |
830 | DEFINE_AGP_HOOK_IOCTL(drm_agp_free_hook_ioctl, agph_free_ioctl) |
831 | DEFINE_AGP_HOOK_IOCTL(drm_agp_bind_hook_ioctl, agph_bind_ioctl) |
832 | DEFINE_AGP_HOOK_IOCTL(drm_agp_unbind_hook_ioctl, agph_unbind_ioctl) |
833 | |
834 | #endif |
835 | |