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ae2a1040 TH |
1 | /************************************************************************** |
2 | * | |
54fbde8a | 3 | * Copyright © 2011-2014 VMware, Inc., Palo Alto, CA., USA |
ae2a1040 TH |
4 | * All Rights Reserved. |
5 | * | |
6 | * Permission is hereby granted, free of charge, to any person obtaining a | |
7 | * copy of this software and associated documentation files (the | |
8 | * "Software"), to deal in the Software without restriction, including | |
9 | * without limitation the rights to use, copy, modify, merge, publish, | |
10 | * distribute, sub license, and/or sell copies of the Software, and to | |
11 | * permit persons to whom the Software is furnished to do so, subject to | |
12 | * the following conditions: | |
13 | * | |
14 | * The above copyright notice and this permission notice (including the | |
15 | * next paragraph) shall be included in all copies or substantial portions | |
16 | * of the Software. | |
17 | * | |
18 | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR | |
19 | * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, | |
20 | * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL | |
21 | * THE COPYRIGHT HOLDERS, AUTHORS AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM, | |
22 | * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR | |
23 | * OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE | |
24 | * USE OR OTHER DEALINGS IN THE SOFTWARE. | |
25 | * | |
26 | **************************************************************************/ | |
27 | ||
760285e7 | 28 | #include <drm/drmP.h> |
ae2a1040 TH |
29 | #include "vmwgfx_drv.h" |
30 | ||
31 | #define VMW_FENCE_WRAP (1 << 31) | |
32 | ||
33 | struct vmw_fence_manager { | |
34 | int num_fence_objects; | |
35 | struct vmw_private *dev_priv; | |
36 | spinlock_t lock; | |
ae2a1040 | 37 | struct list_head fence_list; |
496eb6fd | 38 | struct work_struct work; |
ae2a1040 TH |
39 | u32 user_fence_size; |
40 | u32 fence_size; | |
57c5ee79 | 41 | u32 event_fence_action_size; |
ae2a1040 TH |
42 | bool fifo_down; |
43 | struct list_head cleanup_list; | |
57c5ee79 TH |
44 | uint32_t pending_actions[VMW_ACTION_MAX]; |
45 | struct mutex goal_irq_mutex; | |
46 | bool goal_irq_on; /* Protected by @goal_irq_mutex */ | |
47 | bool seqno_valid; /* Protected by @lock, and may not be set to true | |
48 | without the @goal_irq_mutex held. */ | |
2298e804 | 49 | unsigned ctx; |
ae2a1040 TH |
50 | }; |
51 | ||
52 | struct vmw_user_fence { | |
53 | struct ttm_base_object base; | |
54 | struct vmw_fence_obj fence; | |
55 | }; | |
56 | ||
57 | /** | |
57c5ee79 | 58 | * struct vmw_event_fence_action - fence action that delivers a drm event. |
ae2a1040 | 59 | * |
57c5ee79 TH |
60 | * @e: A struct drm_pending_event that controls the event delivery. |
61 | * @action: A struct vmw_fence_action to hook up to a fence. | |
62 | * @fence: A referenced pointer to the fence to keep it alive while @action | |
63 | * hangs on it. | |
64 | * @dev: Pointer to a struct drm_device so we can access the event stuff. | |
65 | * @kref: Both @e and @action has destructors, so we need to refcount. | |
66 | * @size: Size accounted for this object. | |
67 | * @tv_sec: If non-null, the variable pointed to will be assigned | |
68 | * current time tv_sec val when the fence signals. | |
69 | * @tv_usec: Must be set if @tv_sec is set, and the variable pointed to will | |
70 | * be assigned the current time tv_usec val when the fence signals. | |
71 | */ | |
72 | struct vmw_event_fence_action { | |
57c5ee79 | 73 | struct vmw_fence_action action; |
6b82ef50 | 74 | struct list_head fpriv_head; |
8b7de6aa JB |
75 | |
76 | struct drm_pending_event *event; | |
57c5ee79 TH |
77 | struct vmw_fence_obj *fence; |
78 | struct drm_device *dev; | |
8b7de6aa | 79 | |
57c5ee79 TH |
80 | uint32_t *tv_sec; |
81 | uint32_t *tv_usec; | |
82 | }; | |
83 | ||
2298e804 ML |
84 | static struct vmw_fence_manager * |
85 | fman_from_fence(struct vmw_fence_obj *fence) | |
86 | { | |
87 | return container_of(fence->base.lock, struct vmw_fence_manager, lock); | |
88 | } | |
89 | ||
57c5ee79 TH |
90 | /** |
91 | * Note on fencing subsystem usage of irqs: | |
92 | * Typically the vmw_fences_update function is called | |
93 | * | |
94 | * a) When a new fence seqno has been submitted by the fifo code. | |
95 | * b) On-demand when we have waiters. Sleeping waiters will switch on the | |
96 | * ANY_FENCE irq and call vmw_fences_update function each time an ANY_FENCE | |
97 | * irq is received. When the last fence waiter is gone, that IRQ is masked | |
98 | * away. | |
99 | * | |
100 | * In situations where there are no waiters and we don't submit any new fences, | |
101 | * fence objects may not be signaled. This is perfectly OK, since there are | |
102 | * no consumers of the signaled data, but that is NOT ok when there are fence | |
103 | * actions attached to a fence. The fencing subsystem then makes use of the | |
104 | * FENCE_GOAL irq and sets the fence goal seqno to that of the next fence | |
105 | * which has an action attached, and each time vmw_fences_update is called, | |
106 | * the subsystem makes sure the fence goal seqno is updated. | |
107 | * | |
108 | * The fence goal seqno irq is on as long as there are unsignaled fence | |
109 | * objects with actions attached to them. | |
ae2a1040 TH |
110 | */ |
111 | ||
2298e804 | 112 | static void vmw_fence_obj_destroy(struct fence *f) |
ae2a1040 TH |
113 | { |
114 | struct vmw_fence_obj *fence = | |
2298e804 | 115 | container_of(f, struct vmw_fence_obj, base); |
ae2a1040 | 116 | |
2298e804 ML |
117 | struct vmw_fence_manager *fman = fman_from_fence(fence); |
118 | unsigned long irq_flags; | |
ae2a1040 | 119 | |
2298e804 | 120 | spin_lock_irqsave(&fman->lock, irq_flags); |
ae2a1040 | 121 | list_del_init(&fence->head); |
2298e804 ML |
122 | --fman->num_fence_objects; |
123 | spin_unlock_irqrestore(&fman->lock, irq_flags); | |
124 | fence->destroy(fence); | |
125 | } | |
ae2a1040 | 126 | |
2298e804 ML |
127 | static const char *vmw_fence_get_driver_name(struct fence *f) |
128 | { | |
129 | return "vmwgfx"; | |
130 | } | |
131 | ||
132 | static const char *vmw_fence_get_timeline_name(struct fence *f) | |
133 | { | |
134 | return "svga"; | |
ae2a1040 TH |
135 | } |
136 | ||
2298e804 ML |
137 | static bool vmw_fence_enable_signaling(struct fence *f) |
138 | { | |
139 | struct vmw_fence_obj *fence = | |
140 | container_of(f, struct vmw_fence_obj, base); | |
141 | ||
142 | struct vmw_fence_manager *fman = fman_from_fence(fence); | |
143 | struct vmw_private *dev_priv = fman->dev_priv; | |
144 | ||
b9eb1a61 | 145 | u32 __iomem *fifo_mem = dev_priv->mmio_virt; |
2298e804 ML |
146 | u32 seqno = ioread32(fifo_mem + SVGA_FIFO_FENCE); |
147 | if (seqno - fence->base.seqno < VMW_FENCE_WRAP) | |
148 | return false; | |
149 | ||
496eb6fd | 150 | vmw_fifo_ping_host(dev_priv, SVGA_SYNC_GENERIC); |
2298e804 ML |
151 | |
152 | return true; | |
153 | } | |
154 | ||
155 | struct vmwgfx_wait_cb { | |
156 | struct fence_cb base; | |
157 | struct task_struct *task; | |
158 | }; | |
159 | ||
160 | static void | |
161 | vmwgfx_wait_cb(struct fence *fence, struct fence_cb *cb) | |
162 | { | |
163 | struct vmwgfx_wait_cb *wait = | |
164 | container_of(cb, struct vmwgfx_wait_cb, base); | |
165 | ||
166 | wake_up_process(wait->task); | |
167 | } | |
168 | ||
169 | static void __vmw_fences_update(struct vmw_fence_manager *fman); | |
170 | ||
171 | static long vmw_fence_wait(struct fence *f, bool intr, signed long timeout) | |
172 | { | |
173 | struct vmw_fence_obj *fence = | |
174 | container_of(f, struct vmw_fence_obj, base); | |
175 | ||
176 | struct vmw_fence_manager *fman = fman_from_fence(fence); | |
177 | struct vmw_private *dev_priv = fman->dev_priv; | |
178 | struct vmwgfx_wait_cb cb; | |
179 | long ret = timeout; | |
180 | unsigned long irq_flags; | |
181 | ||
182 | if (likely(vmw_fence_obj_signaled(fence))) | |
183 | return timeout; | |
184 | ||
185 | vmw_fifo_ping_host(dev_priv, SVGA_SYNC_GENERIC); | |
186 | vmw_seqno_waiter_add(dev_priv); | |
187 | ||
188 | spin_lock_irqsave(f->lock, irq_flags); | |
189 | ||
190 | if (intr && signal_pending(current)) { | |
191 | ret = -ERESTARTSYS; | |
192 | goto out; | |
193 | } | |
194 | ||
195 | cb.base.func = vmwgfx_wait_cb; | |
196 | cb.task = current; | |
197 | list_add(&cb.base.node, &f->cb_list); | |
198 | ||
199 | while (ret > 0) { | |
200 | __vmw_fences_update(fman); | |
201 | if (test_bit(FENCE_FLAG_SIGNALED_BIT, &f->flags)) | |
202 | break; | |
203 | ||
204 | if (intr) | |
205 | __set_current_state(TASK_INTERRUPTIBLE); | |
206 | else | |
207 | __set_current_state(TASK_UNINTERRUPTIBLE); | |
208 | spin_unlock_irqrestore(f->lock, irq_flags); | |
209 | ||
210 | ret = schedule_timeout(ret); | |
211 | ||
212 | spin_lock_irqsave(f->lock, irq_flags); | |
213 | if (ret > 0 && intr && signal_pending(current)) | |
214 | ret = -ERESTARTSYS; | |
215 | } | |
216 | ||
217 | if (!list_empty(&cb.base.node)) | |
218 | list_del(&cb.base.node); | |
219 | __set_current_state(TASK_RUNNING); | |
220 | ||
221 | out: | |
222 | spin_unlock_irqrestore(f->lock, irq_flags); | |
223 | ||
224 | vmw_seqno_waiter_remove(dev_priv); | |
225 | ||
226 | return ret; | |
227 | } | |
228 | ||
229 | static struct fence_ops vmw_fence_ops = { | |
230 | .get_driver_name = vmw_fence_get_driver_name, | |
231 | .get_timeline_name = vmw_fence_get_timeline_name, | |
232 | .enable_signaling = vmw_fence_enable_signaling, | |
233 | .wait = vmw_fence_wait, | |
234 | .release = vmw_fence_obj_destroy, | |
235 | }; | |
236 | ||
ae2a1040 TH |
237 | |
238 | /** | |
239 | * Execute signal actions on fences recently signaled. | |
240 | * This is done from a workqueue so we don't have to execute | |
241 | * signal actions from atomic context. | |
242 | */ | |
243 | ||
244 | static void vmw_fence_work_func(struct work_struct *work) | |
245 | { | |
246 | struct vmw_fence_manager *fman = | |
247 | container_of(work, struct vmw_fence_manager, work); | |
248 | struct list_head list; | |
249 | struct vmw_fence_action *action, *next_action; | |
57c5ee79 | 250 | bool seqno_valid; |
ae2a1040 TH |
251 | |
252 | do { | |
253 | INIT_LIST_HEAD(&list); | |
57c5ee79 TH |
254 | mutex_lock(&fman->goal_irq_mutex); |
255 | ||
ae2a1040 TH |
256 | spin_lock_irq(&fman->lock); |
257 | list_splice_init(&fman->cleanup_list, &list); | |
57c5ee79 | 258 | seqno_valid = fman->seqno_valid; |
ae2a1040 TH |
259 | spin_unlock_irq(&fman->lock); |
260 | ||
57c5ee79 TH |
261 | if (!seqno_valid && fman->goal_irq_on) { |
262 | fman->goal_irq_on = false; | |
263 | vmw_goal_waiter_remove(fman->dev_priv); | |
264 | } | |
265 | mutex_unlock(&fman->goal_irq_mutex); | |
266 | ||
ae2a1040 TH |
267 | if (list_empty(&list)) |
268 | return; | |
269 | ||
270 | /* | |
271 | * At this point, only we should be able to manipulate the | |
272 | * list heads of the actions we have on the private list. | |
57c5ee79 | 273 | * hence fman::lock not held. |
ae2a1040 TH |
274 | */ |
275 | ||
276 | list_for_each_entry_safe(action, next_action, &list, head) { | |
277 | list_del_init(&action->head); | |
57c5ee79 TH |
278 | if (action->cleanup) |
279 | action->cleanup(action); | |
ae2a1040 TH |
280 | } |
281 | } while (1); | |
282 | } | |
283 | ||
284 | struct vmw_fence_manager *vmw_fence_manager_init(struct vmw_private *dev_priv) | |
285 | { | |
286 | struct vmw_fence_manager *fman = kzalloc(sizeof(*fman), GFP_KERNEL); | |
287 | ||
288 | if (unlikely(fman == NULL)) | |
289 | return NULL; | |
290 | ||
291 | fman->dev_priv = dev_priv; | |
292 | spin_lock_init(&fman->lock); | |
293 | INIT_LIST_HEAD(&fman->fence_list); | |
294 | INIT_LIST_HEAD(&fman->cleanup_list); | |
295 | INIT_WORK(&fman->work, &vmw_fence_work_func); | |
296 | fman->fifo_down = true; | |
297 | fman->user_fence_size = ttm_round_pot(sizeof(struct vmw_user_fence)); | |
298 | fman->fence_size = ttm_round_pot(sizeof(struct vmw_fence_obj)); | |
57c5ee79 TH |
299 | fman->event_fence_action_size = |
300 | ttm_round_pot(sizeof(struct vmw_event_fence_action)); | |
301 | mutex_init(&fman->goal_irq_mutex); | |
2298e804 | 302 | fman->ctx = fence_context_alloc(1); |
ae2a1040 TH |
303 | |
304 | return fman; | |
305 | } | |
306 | ||
307 | void vmw_fence_manager_takedown(struct vmw_fence_manager *fman) | |
308 | { | |
309 | unsigned long irq_flags; | |
310 | bool lists_empty; | |
311 | ||
312 | (void) cancel_work_sync(&fman->work); | |
313 | ||
314 | spin_lock_irqsave(&fman->lock, irq_flags); | |
315 | lists_empty = list_empty(&fman->fence_list) && | |
316 | list_empty(&fman->cleanup_list); | |
317 | spin_unlock_irqrestore(&fman->lock, irq_flags); | |
318 | ||
319 | BUG_ON(!lists_empty); | |
320 | kfree(fman); | |
321 | } | |
322 | ||
323 | static int vmw_fence_obj_init(struct vmw_fence_manager *fman, | |
c060a4e1 | 324 | struct vmw_fence_obj *fence, u32 seqno, |
ae2a1040 TH |
325 | void (*destroy) (struct vmw_fence_obj *fence)) |
326 | { | |
327 | unsigned long irq_flags; | |
ae2a1040 TH |
328 | int ret = 0; |
329 | ||
2298e804 ML |
330 | fence_init(&fence->base, &vmw_fence_ops, &fman->lock, |
331 | fman->ctx, seqno); | |
ae2a1040 | 332 | INIT_LIST_HEAD(&fence->seq_passed_actions); |
ae2a1040 | 333 | fence->destroy = destroy; |
ae2a1040 TH |
334 | |
335 | spin_lock_irqsave(&fman->lock, irq_flags); | |
336 | if (unlikely(fman->fifo_down)) { | |
337 | ret = -EBUSY; | |
338 | goto out_unlock; | |
339 | } | |
340 | list_add_tail(&fence->head, &fman->fence_list); | |
2298e804 | 341 | ++fman->num_fence_objects; |
ae2a1040 TH |
342 | |
343 | out_unlock: | |
344 | spin_unlock_irqrestore(&fman->lock, irq_flags); | |
345 | return ret; | |
346 | ||
347 | } | |
348 | ||
94844cf0 | 349 | static void vmw_fences_perform_actions(struct vmw_fence_manager *fman, |
ae2a1040 TH |
350 | struct list_head *list) |
351 | { | |
352 | struct vmw_fence_action *action, *next_action; | |
353 | ||
354 | list_for_each_entry_safe(action, next_action, list, head) { | |
355 | list_del_init(&action->head); | |
57c5ee79 | 356 | fman->pending_actions[action->type]--; |
ae2a1040 TH |
357 | if (action->seq_passed != NULL) |
358 | action->seq_passed(action); | |
359 | ||
360 | /* | |
361 | * Add the cleanup action to the cleanup list so that | |
362 | * it will be performed by a worker task. | |
363 | */ | |
364 | ||
57c5ee79 TH |
365 | list_add_tail(&action->head, &fman->cleanup_list); |
366 | } | |
367 | } | |
368 | ||
369 | /** | |
370 | * vmw_fence_goal_new_locked - Figure out a new device fence goal | |
371 | * seqno if needed. | |
372 | * | |
373 | * @fman: Pointer to a fence manager. | |
374 | * @passed_seqno: The seqno the device currently signals as passed. | |
375 | * | |
376 | * This function should be called with the fence manager lock held. | |
377 | * It is typically called when we have a new passed_seqno, and | |
378 | * we might need to update the fence goal. It checks to see whether | |
379 | * the current fence goal has already passed, and, in that case, | |
380 | * scans through all unsignaled fences to get the next fence object with an | |
381 | * action attached, and sets the seqno of that fence as a new fence goal. | |
382 | * | |
383 | * returns true if the device goal seqno was updated. False otherwise. | |
384 | */ | |
385 | static bool vmw_fence_goal_new_locked(struct vmw_fence_manager *fman, | |
386 | u32 passed_seqno) | |
387 | { | |
388 | u32 goal_seqno; | |
b9eb1a61 | 389 | u32 __iomem *fifo_mem; |
57c5ee79 TH |
390 | struct vmw_fence_obj *fence; |
391 | ||
392 | if (likely(!fman->seqno_valid)) | |
393 | return false; | |
394 | ||
395 | fifo_mem = fman->dev_priv->mmio_virt; | |
396 | goal_seqno = ioread32(fifo_mem + SVGA_FIFO_FENCE_GOAL); | |
397 | if (likely(passed_seqno - goal_seqno >= VMW_FENCE_WRAP)) | |
398 | return false; | |
399 | ||
400 | fman->seqno_valid = false; | |
401 | list_for_each_entry(fence, &fman->fence_list, head) { | |
402 | if (!list_empty(&fence->seq_passed_actions)) { | |
403 | fman->seqno_valid = true; | |
2298e804 | 404 | iowrite32(fence->base.seqno, |
57c5ee79 TH |
405 | fifo_mem + SVGA_FIFO_FENCE_GOAL); |
406 | break; | |
407 | } | |
ae2a1040 | 408 | } |
57c5ee79 TH |
409 | |
410 | return true; | |
411 | } | |
412 | ||
413 | ||
414 | /** | |
415 | * vmw_fence_goal_check_locked - Replace the device fence goal seqno if | |
416 | * needed. | |
417 | * | |
418 | * @fence: Pointer to a struct vmw_fence_obj the seqno of which should be | |
419 | * considered as a device fence goal. | |
420 | * | |
421 | * This function should be called with the fence manager lock held. | |
422 | * It is typically called when an action has been attached to a fence to | |
423 | * check whether the seqno of that fence should be used for a fence | |
424 | * goal interrupt. This is typically needed if the current fence goal is | |
425 | * invalid, or has a higher seqno than that of the current fence object. | |
426 | * | |
427 | * returns true if the device goal seqno was updated. False otherwise. | |
428 | */ | |
429 | static bool vmw_fence_goal_check_locked(struct vmw_fence_obj *fence) | |
430 | { | |
2298e804 | 431 | struct vmw_fence_manager *fman = fman_from_fence(fence); |
57c5ee79 | 432 | u32 goal_seqno; |
b9eb1a61 | 433 | u32 __iomem *fifo_mem; |
57c5ee79 | 434 | |
2298e804 | 435 | if (fence_is_signaled_locked(&fence->base)) |
57c5ee79 TH |
436 | return false; |
437 | ||
2298e804 | 438 | fifo_mem = fman->dev_priv->mmio_virt; |
57c5ee79 | 439 | goal_seqno = ioread32(fifo_mem + SVGA_FIFO_FENCE_GOAL); |
2298e804 ML |
440 | if (likely(fman->seqno_valid && |
441 | goal_seqno - fence->base.seqno < VMW_FENCE_WRAP)) | |
57c5ee79 TH |
442 | return false; |
443 | ||
2298e804 ML |
444 | iowrite32(fence->base.seqno, fifo_mem + SVGA_FIFO_FENCE_GOAL); |
445 | fman->seqno_valid = true; | |
57c5ee79 TH |
446 | |
447 | return true; | |
ae2a1040 TH |
448 | } |
449 | ||
2298e804 | 450 | static void __vmw_fences_update(struct vmw_fence_manager *fman) |
ae2a1040 | 451 | { |
ae2a1040 TH |
452 | struct vmw_fence_obj *fence, *next_fence; |
453 | struct list_head action_list; | |
57c5ee79 TH |
454 | bool needs_rerun; |
455 | uint32_t seqno, new_seqno; | |
b9eb1a61 | 456 | u32 __iomem *fifo_mem = fman->dev_priv->mmio_virt; |
ae2a1040 | 457 | |
57c5ee79 TH |
458 | seqno = ioread32(fifo_mem + SVGA_FIFO_FENCE); |
459 | rerun: | |
ae2a1040 | 460 | list_for_each_entry_safe(fence, next_fence, &fman->fence_list, head) { |
2298e804 | 461 | if (seqno - fence->base.seqno < VMW_FENCE_WRAP) { |
ae2a1040 | 462 | list_del_init(&fence->head); |
2298e804 | 463 | fence_signal_locked(&fence->base); |
ae2a1040 TH |
464 | INIT_LIST_HEAD(&action_list); |
465 | list_splice_init(&fence->seq_passed_actions, | |
466 | &action_list); | |
467 | vmw_fences_perform_actions(fman, &action_list); | |
57c5ee79 TH |
468 | } else |
469 | break; | |
ae2a1040 | 470 | } |
57c5ee79 | 471 | |
57c5ee79 TH |
472 | /* |
473 | * Rerun if the fence goal seqno was updated, and the | |
474 | * hardware might have raced with that update, so that | |
475 | * we missed a fence_goal irq. | |
476 | */ | |
477 | ||
2298e804 | 478 | needs_rerun = vmw_fence_goal_new_locked(fman, seqno); |
57c5ee79 TH |
479 | if (unlikely(needs_rerun)) { |
480 | new_seqno = ioread32(fifo_mem + SVGA_FIFO_FENCE); | |
481 | if (new_seqno != seqno) { | |
482 | seqno = new_seqno; | |
483 | goto rerun; | |
484 | } | |
485 | } | |
2298e804 ML |
486 | |
487 | if (!list_empty(&fman->cleanup_list)) | |
488 | (void) schedule_work(&fman->work); | |
57c5ee79 | 489 | } |
ae2a1040 | 490 | |
2298e804 | 491 | void vmw_fences_update(struct vmw_fence_manager *fman) |
ae2a1040 | 492 | { |
ae2a1040 | 493 | unsigned long irq_flags; |
ae2a1040 TH |
494 | |
495 | spin_lock_irqsave(&fman->lock, irq_flags); | |
2298e804 | 496 | __vmw_fences_update(fman); |
ae2a1040 | 497 | spin_unlock_irqrestore(&fman->lock, irq_flags); |
2298e804 ML |
498 | } |
499 | ||
500 | bool vmw_fence_obj_signaled(struct vmw_fence_obj *fence) | |
501 | { | |
502 | struct vmw_fence_manager *fman = fman_from_fence(fence); | |
ae2a1040 | 503 | |
2298e804 | 504 | if (test_bit(FENCE_FLAG_SIGNALED_BIT, &fence->base.flags)) |
ae2a1040 TH |
505 | return 1; |
506 | ||
c060a4e1 | 507 | vmw_fences_update(fman); |
ae2a1040 | 508 | |
2298e804 | 509 | return fence_is_signaled(&fence->base); |
ae2a1040 TH |
510 | } |
511 | ||
c060a4e1 | 512 | int vmw_fence_obj_wait(struct vmw_fence_obj *fence, bool lazy, |
ae2a1040 TH |
513 | bool interruptible, unsigned long timeout) |
514 | { | |
2298e804 | 515 | long ret = fence_wait_timeout(&fence->base, interruptible, timeout); |
ae2a1040 | 516 | |
2298e804 | 517 | if (likely(ret > 0)) |
ae2a1040 | 518 | return 0; |
2298e804 ML |
519 | else if (ret == 0) |
520 | return -EBUSY; | |
ae2a1040 | 521 | else |
2298e804 | 522 | return ret; |
ae2a1040 TH |
523 | } |
524 | ||
525 | void vmw_fence_obj_flush(struct vmw_fence_obj *fence) | |
526 | { | |
2298e804 | 527 | struct vmw_private *dev_priv = fman_from_fence(fence)->dev_priv; |
ae2a1040 TH |
528 | |
529 | vmw_fifo_ping_host(dev_priv, SVGA_SYNC_GENERIC); | |
530 | } | |
531 | ||
532 | static void vmw_fence_destroy(struct vmw_fence_obj *fence) | |
533 | { | |
2298e804 | 534 | fence_free(&fence->base); |
ae2a1040 TH |
535 | } |
536 | ||
537 | int vmw_fence_create(struct vmw_fence_manager *fman, | |
538 | uint32_t seqno, | |
ae2a1040 TH |
539 | struct vmw_fence_obj **p_fence) |
540 | { | |
ae2a1040 TH |
541 | struct vmw_fence_obj *fence; |
542 | int ret; | |
543 | ||
ae2a1040 | 544 | fence = kzalloc(sizeof(*fence), GFP_KERNEL); |
1f563a6a TH |
545 | if (unlikely(fence == NULL)) |
546 | return -ENOMEM; | |
ae2a1040 | 547 | |
c060a4e1 | 548 | ret = vmw_fence_obj_init(fman, fence, seqno, |
ae2a1040 TH |
549 | vmw_fence_destroy); |
550 | if (unlikely(ret != 0)) | |
551 | goto out_err_init; | |
552 | ||
553 | *p_fence = fence; | |
554 | return 0; | |
555 | ||
556 | out_err_init: | |
557 | kfree(fence); | |
ae2a1040 TH |
558 | return ret; |
559 | } | |
560 | ||
561 | ||
562 | static void vmw_user_fence_destroy(struct vmw_fence_obj *fence) | |
563 | { | |
564 | struct vmw_user_fence *ufence = | |
565 | container_of(fence, struct vmw_user_fence, fence); | |
2298e804 | 566 | struct vmw_fence_manager *fman = fman_from_fence(fence); |
ae2a1040 | 567 | |
35f62a58 | 568 | ttm_base_object_kfree(ufence, base); |
ae2a1040 TH |
569 | /* |
570 | * Free kernel space accounting. | |
571 | */ | |
572 | ttm_mem_global_free(vmw_mem_glob(fman->dev_priv), | |
573 | fman->user_fence_size); | |
574 | } | |
575 | ||
576 | static void vmw_user_fence_base_release(struct ttm_base_object **p_base) | |
577 | { | |
578 | struct ttm_base_object *base = *p_base; | |
579 | struct vmw_user_fence *ufence = | |
580 | container_of(base, struct vmw_user_fence, base); | |
581 | struct vmw_fence_obj *fence = &ufence->fence; | |
582 | ||
583 | *p_base = NULL; | |
584 | vmw_fence_obj_unreference(&fence); | |
585 | } | |
586 | ||
587 | int vmw_user_fence_create(struct drm_file *file_priv, | |
588 | struct vmw_fence_manager *fman, | |
589 | uint32_t seqno, | |
ae2a1040 TH |
590 | struct vmw_fence_obj **p_fence, |
591 | uint32_t *p_handle) | |
592 | { | |
593 | struct ttm_object_file *tfile = vmw_fpriv(file_priv)->tfile; | |
594 | struct vmw_user_fence *ufence; | |
595 | struct vmw_fence_obj *tmp; | |
596 | struct ttm_mem_global *mem_glob = vmw_mem_glob(fman->dev_priv); | |
597 | int ret; | |
598 | ||
599 | /* | |
600 | * Kernel memory space accounting, since this object may | |
601 | * be created by a user-space request. | |
602 | */ | |
603 | ||
604 | ret = ttm_mem_global_alloc(mem_glob, fman->user_fence_size, | |
605 | false, false); | |
606 | if (unlikely(ret != 0)) | |
607 | return ret; | |
608 | ||
609 | ufence = kzalloc(sizeof(*ufence), GFP_KERNEL); | |
610 | if (unlikely(ufence == NULL)) { | |
611 | ret = -ENOMEM; | |
612 | goto out_no_object; | |
613 | } | |
614 | ||
615 | ret = vmw_fence_obj_init(fman, &ufence->fence, seqno, | |
c060a4e1 | 616 | vmw_user_fence_destroy); |
ae2a1040 TH |
617 | if (unlikely(ret != 0)) { |
618 | kfree(ufence); | |
619 | goto out_no_object; | |
620 | } | |
621 | ||
622 | /* | |
623 | * The base object holds a reference which is freed in | |
624 | * vmw_user_fence_base_release. | |
625 | */ | |
626 | tmp = vmw_fence_obj_reference(&ufence->fence); | |
627 | ret = ttm_base_object_init(tfile, &ufence->base, false, | |
628 | VMW_RES_FENCE, | |
629 | &vmw_user_fence_base_release, NULL); | |
630 | ||
631 | ||
632 | if (unlikely(ret != 0)) { | |
633 | /* | |
634 | * Free the base object's reference | |
635 | */ | |
636 | vmw_fence_obj_unreference(&tmp); | |
637 | goto out_err; | |
638 | } | |
639 | ||
640 | *p_fence = &ufence->fence; | |
641 | *p_handle = ufence->base.hash.key; | |
642 | ||
643 | return 0; | |
644 | out_err: | |
645 | tmp = &ufence->fence; | |
646 | vmw_fence_obj_unreference(&tmp); | |
647 | out_no_object: | |
648 | ttm_mem_global_free(mem_glob, fman->user_fence_size); | |
649 | return ret; | |
650 | } | |
651 | ||
652 | ||
653 | /** | |
654 | * vmw_fence_fifo_down - signal all unsignaled fence objects. | |
655 | */ | |
656 | ||
657 | void vmw_fence_fifo_down(struct vmw_fence_manager *fman) | |
658 | { | |
ae2a1040 TH |
659 | struct list_head action_list; |
660 | int ret; | |
661 | ||
662 | /* | |
663 | * The list may be altered while we traverse it, so always | |
664 | * restart when we've released the fman->lock. | |
665 | */ | |
666 | ||
2298e804 | 667 | spin_lock_irq(&fman->lock); |
ae2a1040 TH |
668 | fman->fifo_down = true; |
669 | while (!list_empty(&fman->fence_list)) { | |
670 | struct vmw_fence_obj *fence = | |
671 | list_entry(fman->fence_list.prev, struct vmw_fence_obj, | |
672 | head); | |
2298e804 | 673 | fence_get(&fence->base); |
ae2a1040 TH |
674 | spin_unlock_irq(&fman->lock); |
675 | ||
c060a4e1 | 676 | ret = vmw_fence_obj_wait(fence, false, false, |
ae2a1040 TH |
677 | VMW_FENCE_WAIT_TIMEOUT); |
678 | ||
679 | if (unlikely(ret != 0)) { | |
680 | list_del_init(&fence->head); | |
2298e804 | 681 | fence_signal(&fence->base); |
ae2a1040 TH |
682 | INIT_LIST_HEAD(&action_list); |
683 | list_splice_init(&fence->seq_passed_actions, | |
684 | &action_list); | |
685 | vmw_fences_perform_actions(fman, &action_list); | |
ae2a1040 TH |
686 | } |
687 | ||
ae2a1040 | 688 | BUG_ON(!list_empty(&fence->head)); |
2298e804 ML |
689 | fence_put(&fence->base); |
690 | spin_lock_irq(&fman->lock); | |
ae2a1040 | 691 | } |
2298e804 | 692 | spin_unlock_irq(&fman->lock); |
ae2a1040 TH |
693 | } |
694 | ||
695 | void vmw_fence_fifo_up(struct vmw_fence_manager *fman) | |
696 | { | |
697 | unsigned long irq_flags; | |
698 | ||
699 | spin_lock_irqsave(&fman->lock, irq_flags); | |
700 | fman->fifo_down = false; | |
701 | spin_unlock_irqrestore(&fman->lock, irq_flags); | |
702 | } | |
703 | ||
704 | ||
705 | int vmw_fence_obj_wait_ioctl(struct drm_device *dev, void *data, | |
706 | struct drm_file *file_priv) | |
707 | { | |
708 | struct drm_vmw_fence_wait_arg *arg = | |
709 | (struct drm_vmw_fence_wait_arg *)data; | |
710 | unsigned long timeout; | |
711 | struct ttm_base_object *base; | |
712 | struct vmw_fence_obj *fence; | |
713 | struct ttm_object_file *tfile = vmw_fpriv(file_priv)->tfile; | |
714 | int ret; | |
715 | uint64_t wait_timeout = ((uint64_t)arg->timeout_us * HZ); | |
716 | ||
717 | /* | |
718 | * 64-bit division not present on 32-bit systems, so do an | |
719 | * approximation. (Divide by 1000000). | |
720 | */ | |
721 | ||
722 | wait_timeout = (wait_timeout >> 20) + (wait_timeout >> 24) - | |
723 | (wait_timeout >> 26); | |
724 | ||
725 | if (!arg->cookie_valid) { | |
726 | arg->cookie_valid = 1; | |
727 | arg->kernel_cookie = jiffies + wait_timeout; | |
728 | } | |
729 | ||
730 | base = ttm_base_object_lookup(tfile, arg->handle); | |
731 | if (unlikely(base == NULL)) { | |
732 | printk(KERN_ERR "Wait invalid fence object handle " | |
733 | "0x%08lx.\n", | |
734 | (unsigned long)arg->handle); | |
735 | return -EINVAL; | |
736 | } | |
737 | ||
738 | fence = &(container_of(base, struct vmw_user_fence, base)->fence); | |
739 | ||
740 | timeout = jiffies; | |
741 | if (time_after_eq(timeout, (unsigned long)arg->kernel_cookie)) { | |
c060a4e1 | 742 | ret = ((vmw_fence_obj_signaled(fence)) ? |
ae2a1040 TH |
743 | 0 : -EBUSY); |
744 | goto out; | |
745 | } | |
746 | ||
747 | timeout = (unsigned long)arg->kernel_cookie - timeout; | |
748 | ||
c060a4e1 | 749 | ret = vmw_fence_obj_wait(fence, arg->lazy, true, timeout); |
ae2a1040 TH |
750 | |
751 | out: | |
752 | ttm_base_object_unref(&base); | |
753 | ||
754 | /* | |
755 | * Optionally unref the fence object. | |
756 | */ | |
757 | ||
758 | if (ret == 0 && (arg->wait_options & DRM_VMW_WAIT_OPTION_UNREF)) | |
759 | return ttm_ref_object_base_unref(tfile, arg->handle, | |
760 | TTM_REF_USAGE); | |
761 | return ret; | |
762 | } | |
763 | ||
764 | int vmw_fence_obj_signaled_ioctl(struct drm_device *dev, void *data, | |
765 | struct drm_file *file_priv) | |
766 | { | |
767 | struct drm_vmw_fence_signaled_arg *arg = | |
768 | (struct drm_vmw_fence_signaled_arg *) data; | |
769 | struct ttm_base_object *base; | |
770 | struct vmw_fence_obj *fence; | |
771 | struct vmw_fence_manager *fman; | |
772 | struct ttm_object_file *tfile = vmw_fpriv(file_priv)->tfile; | |
773 | struct vmw_private *dev_priv = vmw_priv(dev); | |
774 | ||
775 | base = ttm_base_object_lookup(tfile, arg->handle); | |
776 | if (unlikely(base == NULL)) { | |
777 | printk(KERN_ERR "Fence signaled invalid fence object handle " | |
778 | "0x%08lx.\n", | |
779 | (unsigned long)arg->handle); | |
780 | return -EINVAL; | |
781 | } | |
782 | ||
783 | fence = &(container_of(base, struct vmw_user_fence, base)->fence); | |
2298e804 | 784 | fman = fman_from_fence(fence); |
ae2a1040 | 785 | |
c060a4e1 | 786 | arg->signaled = vmw_fence_obj_signaled(fence); |
ae2a1040 | 787 | |
c060a4e1 | 788 | arg->signaled_flags = arg->flags; |
2298e804 | 789 | spin_lock_irq(&fman->lock); |
ae2a1040 TH |
790 | arg->passed_seqno = dev_priv->last_read_seqno; |
791 | spin_unlock_irq(&fman->lock); | |
792 | ||
793 | ttm_base_object_unref(&base); | |
794 | ||
795 | return 0; | |
796 | } | |
797 | ||
798 | ||
799 | int vmw_fence_obj_unref_ioctl(struct drm_device *dev, void *data, | |
800 | struct drm_file *file_priv) | |
801 | { | |
802 | struct drm_vmw_fence_arg *arg = | |
803 | (struct drm_vmw_fence_arg *) data; | |
804 | ||
805 | return ttm_ref_object_base_unref(vmw_fpriv(file_priv)->tfile, | |
806 | arg->handle, | |
807 | TTM_REF_USAGE); | |
808 | } | |
57c5ee79 | 809 | |
6b82ef50 TH |
810 | /** |
811 | * vmw_event_fence_fpriv_gone - Remove references to struct drm_file objects | |
812 | * | |
813 | * @fman: Pointer to a struct vmw_fence_manager | |
814 | * @event_list: Pointer to linked list of struct vmw_event_fence_action objects | |
815 | * with pointers to a struct drm_file object about to be closed. | |
816 | * | |
817 | * This function removes all pending fence events with references to a | |
818 | * specific struct drm_file object about to be closed. The caller is required | |
819 | * to pass a list of all struct vmw_event_fence_action objects with such | |
820 | * events attached. This function is typically called before the | |
821 | * struct drm_file object's event management is taken down. | |
822 | */ | |
823 | void vmw_event_fence_fpriv_gone(struct vmw_fence_manager *fman, | |
824 | struct list_head *event_list) | |
825 | { | |
826 | struct vmw_event_fence_action *eaction; | |
827 | struct drm_pending_event *event; | |
828 | unsigned long irq_flags; | |
829 | ||
830 | while (1) { | |
831 | spin_lock_irqsave(&fman->lock, irq_flags); | |
832 | if (list_empty(event_list)) | |
833 | goto out_unlock; | |
834 | eaction = list_first_entry(event_list, | |
835 | struct vmw_event_fence_action, | |
836 | fpriv_head); | |
837 | list_del_init(&eaction->fpriv_head); | |
838 | event = eaction->event; | |
839 | eaction->event = NULL; | |
840 | spin_unlock_irqrestore(&fman->lock, irq_flags); | |
841 | event->destroy(event); | |
842 | } | |
843 | out_unlock: | |
844 | spin_unlock_irqrestore(&fman->lock, irq_flags); | |
845 | } | |
846 | ||
57c5ee79 TH |
847 | |
848 | /** | |
849 | * vmw_event_fence_action_seq_passed | |
850 | * | |
851 | * @action: The struct vmw_fence_action embedded in a struct | |
852 | * vmw_event_fence_action. | |
853 | * | |
854 | * This function is called when the seqno of the fence where @action is | |
855 | * attached has passed. It queues the event on the submitter's event list. | |
856 | * This function is always called from atomic context, and may be called | |
8b7de6aa | 857 | * from irq context. |
57c5ee79 TH |
858 | */ |
859 | static void vmw_event_fence_action_seq_passed(struct vmw_fence_action *action) | |
860 | { | |
861 | struct vmw_event_fence_action *eaction = | |
862 | container_of(action, struct vmw_event_fence_action, action); | |
863 | struct drm_device *dev = eaction->dev; | |
6b82ef50 TH |
864 | struct drm_pending_event *event = eaction->event; |
865 | struct drm_file *file_priv; | |
57c5ee79 TH |
866 | unsigned long irq_flags; |
867 | ||
6b82ef50 TH |
868 | if (unlikely(event == NULL)) |
869 | return; | |
870 | ||
871 | file_priv = event->file_priv; | |
57c5ee79 TH |
872 | spin_lock_irqsave(&dev->event_lock, irq_flags); |
873 | ||
874 | if (likely(eaction->tv_sec != NULL)) { | |
875 | struct timeval tv; | |
876 | ||
877 | do_gettimeofday(&tv); | |
878 | *eaction->tv_sec = tv.tv_sec; | |
879 | *eaction->tv_usec = tv.tv_usec; | |
880 | } | |
881 | ||
6b82ef50 | 882 | list_del_init(&eaction->fpriv_head); |
8b7de6aa | 883 | list_add_tail(&eaction->event->link, &file_priv->event_list); |
6b82ef50 | 884 | eaction->event = NULL; |
57c5ee79 TH |
885 | wake_up_all(&file_priv->event_wait); |
886 | spin_unlock_irqrestore(&dev->event_lock, irq_flags); | |
887 | } | |
888 | ||
889 | /** | |
890 | * vmw_event_fence_action_cleanup | |
891 | * | |
892 | * @action: The struct vmw_fence_action embedded in a struct | |
893 | * vmw_event_fence_action. | |
894 | * | |
895 | * This function is the struct vmw_fence_action destructor. It's typically | |
896 | * called from a workqueue. | |
897 | */ | |
898 | static void vmw_event_fence_action_cleanup(struct vmw_fence_action *action) | |
899 | { | |
900 | struct vmw_event_fence_action *eaction = | |
901 | container_of(action, struct vmw_event_fence_action, action); | |
2298e804 | 902 | struct vmw_fence_manager *fman = fman_from_fence(eaction->fence); |
6b82ef50 TH |
903 | unsigned long irq_flags; |
904 | ||
905 | spin_lock_irqsave(&fman->lock, irq_flags); | |
906 | list_del(&eaction->fpriv_head); | |
907 | spin_unlock_irqrestore(&fman->lock, irq_flags); | |
57c5ee79 TH |
908 | |
909 | vmw_fence_obj_unreference(&eaction->fence); | |
8b7de6aa | 910 | kfree(eaction); |
57c5ee79 TH |
911 | } |
912 | ||
913 | ||
914 | /** | |
915 | * vmw_fence_obj_add_action - Add an action to a fence object. | |
916 | * | |
917 | * @fence - The fence object. | |
918 | * @action - The action to add. | |
919 | * | |
920 | * Note that the action callbacks may be executed before this function | |
921 | * returns. | |
922 | */ | |
94844cf0 | 923 | static void vmw_fence_obj_add_action(struct vmw_fence_obj *fence, |
57c5ee79 TH |
924 | struct vmw_fence_action *action) |
925 | { | |
2298e804 | 926 | struct vmw_fence_manager *fman = fman_from_fence(fence); |
57c5ee79 TH |
927 | unsigned long irq_flags; |
928 | bool run_update = false; | |
929 | ||
930 | mutex_lock(&fman->goal_irq_mutex); | |
931 | spin_lock_irqsave(&fman->lock, irq_flags); | |
932 | ||
933 | fman->pending_actions[action->type]++; | |
2298e804 | 934 | if (fence_is_signaled_locked(&fence->base)) { |
57c5ee79 TH |
935 | struct list_head action_list; |
936 | ||
937 | INIT_LIST_HEAD(&action_list); | |
938 | list_add_tail(&action->head, &action_list); | |
939 | vmw_fences_perform_actions(fman, &action_list); | |
940 | } else { | |
941 | list_add_tail(&action->head, &fence->seq_passed_actions); | |
942 | ||
943 | /* | |
944 | * This function may set fman::seqno_valid, so it must | |
945 | * be run with the goal_irq_mutex held. | |
946 | */ | |
947 | run_update = vmw_fence_goal_check_locked(fence); | |
948 | } | |
949 | ||
950 | spin_unlock_irqrestore(&fman->lock, irq_flags); | |
951 | ||
952 | if (run_update) { | |
953 | if (!fman->goal_irq_on) { | |
954 | fman->goal_irq_on = true; | |
955 | vmw_goal_waiter_add(fman->dev_priv); | |
956 | } | |
957 | vmw_fences_update(fman); | |
958 | } | |
959 | mutex_unlock(&fman->goal_irq_mutex); | |
960 | ||
961 | } | |
962 | ||
963 | /** | |
964 | * vmw_event_fence_action_create - Post an event for sending when a fence | |
965 | * object seqno has passed. | |
966 | * | |
967 | * @file_priv: The file connection on which the event should be posted. | |
968 | * @fence: The fence object on which to post the event. | |
969 | * @event: Event to be posted. This event should've been alloced | |
970 | * using k[mz]alloc, and should've been completely initialized. | |
971 | * @interruptible: Interruptible waits if possible. | |
972 | * | |
973 | * As a side effect, the object pointed to by @event may have been | |
974 | * freed when this function returns. If this function returns with | |
975 | * an error code, the caller needs to free that object. | |
976 | */ | |
977 | ||
8b7de6aa JB |
978 | int vmw_event_fence_action_queue(struct drm_file *file_priv, |
979 | struct vmw_fence_obj *fence, | |
980 | struct drm_pending_event *event, | |
981 | uint32_t *tv_sec, | |
982 | uint32_t *tv_usec, | |
983 | bool interruptible) | |
57c5ee79 | 984 | { |
0c5d3703 | 985 | struct vmw_event_fence_action *eaction; |
2298e804 | 986 | struct vmw_fence_manager *fman = fman_from_fence(fence); |
6b82ef50 TH |
987 | struct vmw_fpriv *vmw_fp = vmw_fpriv(file_priv); |
988 | unsigned long irq_flags; | |
57c5ee79 TH |
989 | |
990 | eaction = kzalloc(sizeof(*eaction), GFP_KERNEL); | |
8b7de6aa | 991 | if (unlikely(eaction == NULL)) |
57c5ee79 | 992 | return -ENOMEM; |
57c5ee79 | 993 | |
8b7de6aa | 994 | eaction->event = event; |
57c5ee79 TH |
995 | |
996 | eaction->action.seq_passed = vmw_event_fence_action_seq_passed; | |
997 | eaction->action.cleanup = vmw_event_fence_action_cleanup; | |
998 | eaction->action.type = VMW_ACTION_EVENT; | |
999 | ||
1000 | eaction->fence = vmw_fence_obj_reference(fence); | |
1001 | eaction->dev = fman->dev_priv->dev; | |
57c5ee79 TH |
1002 | eaction->tv_sec = tv_sec; |
1003 | eaction->tv_usec = tv_usec; | |
1004 | ||
6b82ef50 TH |
1005 | spin_lock_irqsave(&fman->lock, irq_flags); |
1006 | list_add_tail(&eaction->fpriv_head, &vmw_fp->fence_events); | |
1007 | spin_unlock_irqrestore(&fman->lock, irq_flags); | |
1008 | ||
57c5ee79 TH |
1009 | vmw_fence_obj_add_action(fence, &eaction->action); |
1010 | ||
1011 | return 0; | |
1012 | } | |
1013 | ||
8b7de6aa JB |
1014 | struct vmw_event_fence_pending { |
1015 | struct drm_pending_event base; | |
1016 | struct drm_vmw_event_fence event; | |
1017 | }; | |
1018 | ||
94844cf0 | 1019 | static int vmw_event_fence_action_create(struct drm_file *file_priv, |
8b7de6aa JB |
1020 | struct vmw_fence_obj *fence, |
1021 | uint32_t flags, | |
1022 | uint64_t user_data, | |
1023 | bool interruptible) | |
1024 | { | |
1025 | struct vmw_event_fence_pending *event; | |
2298e804 ML |
1026 | struct vmw_fence_manager *fman = fman_from_fence(fence); |
1027 | struct drm_device *dev = fman->dev_priv->dev; | |
8b7de6aa JB |
1028 | unsigned long irq_flags; |
1029 | int ret; | |
1030 | ||
1031 | spin_lock_irqsave(&dev->event_lock, irq_flags); | |
1032 | ||
1033 | ret = (file_priv->event_space < sizeof(event->event)) ? -EBUSY : 0; | |
1034 | if (likely(ret == 0)) | |
1035 | file_priv->event_space -= sizeof(event->event); | |
1036 | ||
1037 | spin_unlock_irqrestore(&dev->event_lock, irq_flags); | |
1038 | ||
1039 | if (unlikely(ret != 0)) { | |
1040 | DRM_ERROR("Failed to allocate event space for this file.\n"); | |
1041 | goto out_no_space; | |
1042 | } | |
1043 | ||
1044 | ||
68c4fce7 | 1045 | event = kzalloc(sizeof(*event), GFP_KERNEL); |
8b7de6aa JB |
1046 | if (unlikely(event == NULL)) { |
1047 | DRM_ERROR("Failed to allocate an event.\n"); | |
1048 | ret = -ENOMEM; | |
1049 | goto out_no_event; | |
1050 | } | |
1051 | ||
1052 | event->event.base.type = DRM_VMW_EVENT_FENCE_SIGNALED; | |
1053 | event->event.base.length = sizeof(*event); | |
1054 | event->event.user_data = user_data; | |
1055 | ||
1056 | event->base.event = &event->event.base; | |
1057 | event->base.file_priv = file_priv; | |
1058 | event->base.destroy = (void (*) (struct drm_pending_event *)) kfree; | |
1059 | ||
1060 | ||
1061 | if (flags & DRM_VMW_FE_FLAG_REQ_TIME) | |
1062 | ret = vmw_event_fence_action_queue(file_priv, fence, | |
1063 | &event->base, | |
1064 | &event->event.tv_sec, | |
1065 | &event->event.tv_usec, | |
1066 | interruptible); | |
1067 | else | |
1068 | ret = vmw_event_fence_action_queue(file_priv, fence, | |
1069 | &event->base, | |
1070 | NULL, | |
1071 | NULL, | |
1072 | interruptible); | |
1073 | if (ret != 0) | |
1074 | goto out_no_queue; | |
1075 | ||
89669e7a TH |
1076 | return 0; |
1077 | ||
8b7de6aa JB |
1078 | out_no_queue: |
1079 | event->base.destroy(&event->base); | |
1080 | out_no_event: | |
1081 | spin_lock_irqsave(&dev->event_lock, irq_flags); | |
1082 | file_priv->event_space += sizeof(*event); | |
1083 | spin_unlock_irqrestore(&dev->event_lock, irq_flags); | |
1084 | out_no_space: | |
1085 | return ret; | |
1086 | } | |
1087 | ||
57c5ee79 TH |
1088 | int vmw_fence_event_ioctl(struct drm_device *dev, void *data, |
1089 | struct drm_file *file_priv) | |
1090 | { | |
1091 | struct vmw_private *dev_priv = vmw_priv(dev); | |
1092 | struct drm_vmw_fence_event_arg *arg = | |
1093 | (struct drm_vmw_fence_event_arg *) data; | |
1094 | struct vmw_fence_obj *fence = NULL; | |
1095 | struct vmw_fpriv *vmw_fp = vmw_fpriv(file_priv); | |
1096 | struct drm_vmw_fence_rep __user *user_fence_rep = | |
1097 | (struct drm_vmw_fence_rep __user *)(unsigned long) | |
1098 | arg->fence_rep; | |
1099 | uint32_t handle; | |
57c5ee79 TH |
1100 | int ret; |
1101 | ||
1102 | /* | |
1103 | * Look up an existing fence object, | |
1104 | * and if user-space wants a new reference, | |
1105 | * add one. | |
1106 | */ | |
1107 | if (arg->handle) { | |
1108 | struct ttm_base_object *base = | |
05efb1ab TH |
1109 | ttm_base_object_lookup_for_ref(dev_priv->tdev, |
1110 | arg->handle); | |
57c5ee79 TH |
1111 | |
1112 | if (unlikely(base == NULL)) { | |
1113 | DRM_ERROR("Fence event invalid fence object handle " | |
1114 | "0x%08lx.\n", | |
1115 | (unsigned long)arg->handle); | |
1116 | return -EINVAL; | |
1117 | } | |
1118 | fence = &(container_of(base, struct vmw_user_fence, | |
1119 | base)->fence); | |
1120 | (void) vmw_fence_obj_reference(fence); | |
1121 | ||
1122 | if (user_fence_rep != NULL) { | |
1123 | bool existed; | |
1124 | ||
1125 | ret = ttm_ref_object_add(vmw_fp->tfile, base, | |
1126 | TTM_REF_USAGE, &existed); | |
1127 | if (unlikely(ret != 0)) { | |
1128 | DRM_ERROR("Failed to reference a fence " | |
1129 | "object.\n"); | |
1130 | goto out_no_ref_obj; | |
1131 | } | |
1132 | handle = base->hash.key; | |
1133 | } | |
1134 | ttm_base_object_unref(&base); | |
1135 | } | |
1136 | ||
1137 | /* | |
1138 | * Create a new fence object. | |
1139 | */ | |
1140 | if (!fence) { | |
1141 | ret = vmw_execbuf_fence_commands(file_priv, dev_priv, | |
1142 | &fence, | |
1143 | (user_fence_rep) ? | |
1144 | &handle : NULL); | |
1145 | if (unlikely(ret != 0)) { | |
1146 | DRM_ERROR("Fence event failed to create fence.\n"); | |
1147 | return ret; | |
1148 | } | |
1149 | } | |
1150 | ||
1151 | BUG_ON(fence == NULL); | |
1152 | ||
89669e7a TH |
1153 | ret = vmw_event_fence_action_create(file_priv, fence, |
1154 | arg->flags, | |
1155 | arg->user_data, | |
1156 | true); | |
57c5ee79 TH |
1157 | if (unlikely(ret != 0)) { |
1158 | if (ret != -ERESTARTSYS) | |
1159 | DRM_ERROR("Failed to attach event to fence.\n"); | |
8b7de6aa | 1160 | goto out_no_create; |
57c5ee79 TH |
1161 | } |
1162 | ||
1163 | vmw_execbuf_copy_fence_user(dev_priv, vmw_fp, 0, user_fence_rep, fence, | |
1164 | handle); | |
1165 | vmw_fence_obj_unreference(&fence); | |
1166 | return 0; | |
8b7de6aa | 1167 | out_no_create: |
57c5ee79 TH |
1168 | if (user_fence_rep != NULL) |
1169 | ttm_ref_object_base_unref(vmw_fpriv(file_priv)->tfile, | |
1170 | handle, TTM_REF_USAGE); | |
1171 | out_no_ref_obj: | |
1172 | vmw_fence_obj_unreference(&fence); | |
1173 | return ret; | |
1174 | } |