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ae2a1040 TH |
1 | /************************************************************************** |
2 | * | |
3 | * Copyright © 2011 VMware, Inc., Palo Alto, CA., USA | |
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; |
2298e804 | 38 | struct work_struct work, ping_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 void vmw_fence_ping_func(struct work_struct *work) |
138 | { | |
139 | struct vmw_fence_manager *fman = | |
140 | container_of(work, struct vmw_fence_manager, ping_work); | |
141 | ||
142 | vmw_fifo_ping_host(fman->dev_priv, SVGA_SYNC_GENERIC); | |
143 | } | |
144 | ||
145 | static bool vmw_fence_enable_signaling(struct fence *f) | |
146 | { | |
147 | struct vmw_fence_obj *fence = | |
148 | container_of(f, struct vmw_fence_obj, base); | |
149 | ||
150 | struct vmw_fence_manager *fman = fman_from_fence(fence); | |
151 | struct vmw_private *dev_priv = fman->dev_priv; | |
152 | ||
153 | __le32 __iomem *fifo_mem = dev_priv->mmio_virt; | |
154 | u32 seqno = ioread32(fifo_mem + SVGA_FIFO_FENCE); | |
155 | if (seqno - fence->base.seqno < VMW_FENCE_WRAP) | |
156 | return false; | |
157 | ||
158 | if (mutex_trylock(&dev_priv->hw_mutex)) { | |
159 | vmw_fifo_ping_host_locked(dev_priv, SVGA_SYNC_GENERIC); | |
160 | mutex_unlock(&dev_priv->hw_mutex); | |
161 | } else | |
162 | schedule_work(&fman->ping_work); | |
163 | ||
164 | return true; | |
165 | } | |
166 | ||
167 | struct vmwgfx_wait_cb { | |
168 | struct fence_cb base; | |
169 | struct task_struct *task; | |
170 | }; | |
171 | ||
172 | static void | |
173 | vmwgfx_wait_cb(struct fence *fence, struct fence_cb *cb) | |
174 | { | |
175 | struct vmwgfx_wait_cb *wait = | |
176 | container_of(cb, struct vmwgfx_wait_cb, base); | |
177 | ||
178 | wake_up_process(wait->task); | |
179 | } | |
180 | ||
181 | static void __vmw_fences_update(struct vmw_fence_manager *fman); | |
182 | ||
183 | static long vmw_fence_wait(struct fence *f, bool intr, signed long timeout) | |
184 | { | |
185 | struct vmw_fence_obj *fence = | |
186 | container_of(f, struct vmw_fence_obj, base); | |
187 | ||
188 | struct vmw_fence_manager *fman = fman_from_fence(fence); | |
189 | struct vmw_private *dev_priv = fman->dev_priv; | |
190 | struct vmwgfx_wait_cb cb; | |
191 | long ret = timeout; | |
192 | unsigned long irq_flags; | |
193 | ||
194 | if (likely(vmw_fence_obj_signaled(fence))) | |
195 | return timeout; | |
196 | ||
197 | vmw_fifo_ping_host(dev_priv, SVGA_SYNC_GENERIC); | |
198 | vmw_seqno_waiter_add(dev_priv); | |
199 | ||
200 | spin_lock_irqsave(f->lock, irq_flags); | |
201 | ||
202 | if (intr && signal_pending(current)) { | |
203 | ret = -ERESTARTSYS; | |
204 | goto out; | |
205 | } | |
206 | ||
207 | cb.base.func = vmwgfx_wait_cb; | |
208 | cb.task = current; | |
209 | list_add(&cb.base.node, &f->cb_list); | |
210 | ||
211 | while (ret > 0) { | |
212 | __vmw_fences_update(fman); | |
213 | if (test_bit(FENCE_FLAG_SIGNALED_BIT, &f->flags)) | |
214 | break; | |
215 | ||
216 | if (intr) | |
217 | __set_current_state(TASK_INTERRUPTIBLE); | |
218 | else | |
219 | __set_current_state(TASK_UNINTERRUPTIBLE); | |
220 | spin_unlock_irqrestore(f->lock, irq_flags); | |
221 | ||
222 | ret = schedule_timeout(ret); | |
223 | ||
224 | spin_lock_irqsave(f->lock, irq_flags); | |
225 | if (ret > 0 && intr && signal_pending(current)) | |
226 | ret = -ERESTARTSYS; | |
227 | } | |
228 | ||
229 | if (!list_empty(&cb.base.node)) | |
230 | list_del(&cb.base.node); | |
231 | __set_current_state(TASK_RUNNING); | |
232 | ||
233 | out: | |
234 | spin_unlock_irqrestore(f->lock, irq_flags); | |
235 | ||
236 | vmw_seqno_waiter_remove(dev_priv); | |
237 | ||
238 | return ret; | |
239 | } | |
240 | ||
241 | static struct fence_ops vmw_fence_ops = { | |
242 | .get_driver_name = vmw_fence_get_driver_name, | |
243 | .get_timeline_name = vmw_fence_get_timeline_name, | |
244 | .enable_signaling = vmw_fence_enable_signaling, | |
245 | .wait = vmw_fence_wait, | |
246 | .release = vmw_fence_obj_destroy, | |
247 | }; | |
248 | ||
ae2a1040 TH |
249 | |
250 | /** | |
251 | * Execute signal actions on fences recently signaled. | |
252 | * This is done from a workqueue so we don't have to execute | |
253 | * signal actions from atomic context. | |
254 | */ | |
255 | ||
256 | static void vmw_fence_work_func(struct work_struct *work) | |
257 | { | |
258 | struct vmw_fence_manager *fman = | |
259 | container_of(work, struct vmw_fence_manager, work); | |
260 | struct list_head list; | |
261 | struct vmw_fence_action *action, *next_action; | |
57c5ee79 | 262 | bool seqno_valid; |
ae2a1040 TH |
263 | |
264 | do { | |
265 | INIT_LIST_HEAD(&list); | |
57c5ee79 TH |
266 | mutex_lock(&fman->goal_irq_mutex); |
267 | ||
ae2a1040 TH |
268 | spin_lock_irq(&fman->lock); |
269 | list_splice_init(&fman->cleanup_list, &list); | |
57c5ee79 | 270 | seqno_valid = fman->seqno_valid; |
ae2a1040 TH |
271 | spin_unlock_irq(&fman->lock); |
272 | ||
57c5ee79 TH |
273 | if (!seqno_valid && fman->goal_irq_on) { |
274 | fman->goal_irq_on = false; | |
275 | vmw_goal_waiter_remove(fman->dev_priv); | |
276 | } | |
277 | mutex_unlock(&fman->goal_irq_mutex); | |
278 | ||
ae2a1040 TH |
279 | if (list_empty(&list)) |
280 | return; | |
281 | ||
282 | /* | |
283 | * At this point, only we should be able to manipulate the | |
284 | * list heads of the actions we have on the private list. | |
57c5ee79 | 285 | * hence fman::lock not held. |
ae2a1040 TH |
286 | */ |
287 | ||
288 | list_for_each_entry_safe(action, next_action, &list, head) { | |
289 | list_del_init(&action->head); | |
57c5ee79 TH |
290 | if (action->cleanup) |
291 | action->cleanup(action); | |
ae2a1040 TH |
292 | } |
293 | } while (1); | |
294 | } | |
295 | ||
296 | struct vmw_fence_manager *vmw_fence_manager_init(struct vmw_private *dev_priv) | |
297 | { | |
298 | struct vmw_fence_manager *fman = kzalloc(sizeof(*fman), GFP_KERNEL); | |
299 | ||
300 | if (unlikely(fman == NULL)) | |
301 | return NULL; | |
302 | ||
303 | fman->dev_priv = dev_priv; | |
304 | spin_lock_init(&fman->lock); | |
305 | INIT_LIST_HEAD(&fman->fence_list); | |
306 | INIT_LIST_HEAD(&fman->cleanup_list); | |
307 | INIT_WORK(&fman->work, &vmw_fence_work_func); | |
2298e804 | 308 | INIT_WORK(&fman->ping_work, &vmw_fence_ping_func); |
ae2a1040 TH |
309 | fman->fifo_down = true; |
310 | fman->user_fence_size = ttm_round_pot(sizeof(struct vmw_user_fence)); | |
311 | fman->fence_size = ttm_round_pot(sizeof(struct vmw_fence_obj)); | |
57c5ee79 TH |
312 | fman->event_fence_action_size = |
313 | ttm_round_pot(sizeof(struct vmw_event_fence_action)); | |
314 | mutex_init(&fman->goal_irq_mutex); | |
2298e804 | 315 | fman->ctx = fence_context_alloc(1); |
ae2a1040 TH |
316 | |
317 | return fman; | |
318 | } | |
319 | ||
320 | void vmw_fence_manager_takedown(struct vmw_fence_manager *fman) | |
321 | { | |
322 | unsigned long irq_flags; | |
323 | bool lists_empty; | |
324 | ||
325 | (void) cancel_work_sync(&fman->work); | |
2298e804 | 326 | (void) cancel_work_sync(&fman->ping_work); |
ae2a1040 TH |
327 | |
328 | spin_lock_irqsave(&fman->lock, irq_flags); | |
329 | lists_empty = list_empty(&fman->fence_list) && | |
330 | list_empty(&fman->cleanup_list); | |
331 | spin_unlock_irqrestore(&fman->lock, irq_flags); | |
332 | ||
333 | BUG_ON(!lists_empty); | |
334 | kfree(fman); | |
335 | } | |
336 | ||
337 | static int vmw_fence_obj_init(struct vmw_fence_manager *fman, | |
c060a4e1 | 338 | struct vmw_fence_obj *fence, u32 seqno, |
ae2a1040 TH |
339 | void (*destroy) (struct vmw_fence_obj *fence)) |
340 | { | |
341 | unsigned long irq_flags; | |
ae2a1040 TH |
342 | int ret = 0; |
343 | ||
2298e804 ML |
344 | fence_init(&fence->base, &vmw_fence_ops, &fman->lock, |
345 | fman->ctx, seqno); | |
ae2a1040 | 346 | INIT_LIST_HEAD(&fence->seq_passed_actions); |
ae2a1040 | 347 | fence->destroy = destroy; |
ae2a1040 TH |
348 | |
349 | spin_lock_irqsave(&fman->lock, irq_flags); | |
350 | if (unlikely(fman->fifo_down)) { | |
351 | ret = -EBUSY; | |
352 | goto out_unlock; | |
353 | } | |
354 | list_add_tail(&fence->head, &fman->fence_list); | |
2298e804 | 355 | ++fman->num_fence_objects; |
ae2a1040 TH |
356 | |
357 | out_unlock: | |
358 | spin_unlock_irqrestore(&fman->lock, irq_flags); | |
359 | return ret; | |
360 | ||
361 | } | |
362 | ||
94844cf0 | 363 | static void vmw_fences_perform_actions(struct vmw_fence_manager *fman, |
ae2a1040 TH |
364 | struct list_head *list) |
365 | { | |
366 | struct vmw_fence_action *action, *next_action; | |
367 | ||
368 | list_for_each_entry_safe(action, next_action, list, head) { | |
369 | list_del_init(&action->head); | |
57c5ee79 | 370 | fman->pending_actions[action->type]--; |
ae2a1040 TH |
371 | if (action->seq_passed != NULL) |
372 | action->seq_passed(action); | |
373 | ||
374 | /* | |
375 | * Add the cleanup action to the cleanup list so that | |
376 | * it will be performed by a worker task. | |
377 | */ | |
378 | ||
57c5ee79 TH |
379 | list_add_tail(&action->head, &fman->cleanup_list); |
380 | } | |
381 | } | |
382 | ||
383 | /** | |
384 | * vmw_fence_goal_new_locked - Figure out a new device fence goal | |
385 | * seqno if needed. | |
386 | * | |
387 | * @fman: Pointer to a fence manager. | |
388 | * @passed_seqno: The seqno the device currently signals as passed. | |
389 | * | |
390 | * This function should be called with the fence manager lock held. | |
391 | * It is typically called when we have a new passed_seqno, and | |
392 | * we might need to update the fence goal. It checks to see whether | |
393 | * the current fence goal has already passed, and, in that case, | |
394 | * scans through all unsignaled fences to get the next fence object with an | |
395 | * action attached, and sets the seqno of that fence as a new fence goal. | |
396 | * | |
397 | * returns true if the device goal seqno was updated. False otherwise. | |
398 | */ | |
399 | static bool vmw_fence_goal_new_locked(struct vmw_fence_manager *fman, | |
400 | u32 passed_seqno) | |
401 | { | |
402 | u32 goal_seqno; | |
403 | __le32 __iomem *fifo_mem; | |
404 | struct vmw_fence_obj *fence; | |
405 | ||
406 | if (likely(!fman->seqno_valid)) | |
407 | return false; | |
408 | ||
409 | fifo_mem = fman->dev_priv->mmio_virt; | |
410 | goal_seqno = ioread32(fifo_mem + SVGA_FIFO_FENCE_GOAL); | |
411 | if (likely(passed_seqno - goal_seqno >= VMW_FENCE_WRAP)) | |
412 | return false; | |
413 | ||
414 | fman->seqno_valid = false; | |
415 | list_for_each_entry(fence, &fman->fence_list, head) { | |
416 | if (!list_empty(&fence->seq_passed_actions)) { | |
417 | fman->seqno_valid = true; | |
2298e804 | 418 | iowrite32(fence->base.seqno, |
57c5ee79 TH |
419 | fifo_mem + SVGA_FIFO_FENCE_GOAL); |
420 | break; | |
421 | } | |
ae2a1040 | 422 | } |
57c5ee79 TH |
423 | |
424 | return true; | |
425 | } | |
426 | ||
427 | ||
428 | /** | |
429 | * vmw_fence_goal_check_locked - Replace the device fence goal seqno if | |
430 | * needed. | |
431 | * | |
432 | * @fence: Pointer to a struct vmw_fence_obj the seqno of which should be | |
433 | * considered as a device fence goal. | |
434 | * | |
435 | * This function should be called with the fence manager lock held. | |
436 | * It is typically called when an action has been attached to a fence to | |
437 | * check whether the seqno of that fence should be used for a fence | |
438 | * goal interrupt. This is typically needed if the current fence goal is | |
439 | * invalid, or has a higher seqno than that of the current fence object. | |
440 | * | |
441 | * returns true if the device goal seqno was updated. False otherwise. | |
442 | */ | |
443 | static bool vmw_fence_goal_check_locked(struct vmw_fence_obj *fence) | |
444 | { | |
2298e804 | 445 | struct vmw_fence_manager *fman = fman_from_fence(fence); |
57c5ee79 TH |
446 | u32 goal_seqno; |
447 | __le32 __iomem *fifo_mem; | |
448 | ||
2298e804 | 449 | if (fence_is_signaled_locked(&fence->base)) |
57c5ee79 TH |
450 | return false; |
451 | ||
2298e804 | 452 | fifo_mem = fman->dev_priv->mmio_virt; |
57c5ee79 | 453 | goal_seqno = ioread32(fifo_mem + SVGA_FIFO_FENCE_GOAL); |
2298e804 ML |
454 | if (likely(fman->seqno_valid && |
455 | goal_seqno - fence->base.seqno < VMW_FENCE_WRAP)) | |
57c5ee79 TH |
456 | return false; |
457 | ||
2298e804 ML |
458 | iowrite32(fence->base.seqno, fifo_mem + SVGA_FIFO_FENCE_GOAL); |
459 | fman->seqno_valid = true; | |
57c5ee79 TH |
460 | |
461 | return true; | |
ae2a1040 TH |
462 | } |
463 | ||
2298e804 | 464 | static void __vmw_fences_update(struct vmw_fence_manager *fman) |
ae2a1040 | 465 | { |
ae2a1040 TH |
466 | struct vmw_fence_obj *fence, *next_fence; |
467 | struct list_head action_list; | |
57c5ee79 TH |
468 | bool needs_rerun; |
469 | uint32_t seqno, new_seqno; | |
470 | __le32 __iomem *fifo_mem = fman->dev_priv->mmio_virt; | |
ae2a1040 | 471 | |
57c5ee79 TH |
472 | seqno = ioread32(fifo_mem + SVGA_FIFO_FENCE); |
473 | rerun: | |
ae2a1040 | 474 | list_for_each_entry_safe(fence, next_fence, &fman->fence_list, head) { |
2298e804 | 475 | if (seqno - fence->base.seqno < VMW_FENCE_WRAP) { |
ae2a1040 | 476 | list_del_init(&fence->head); |
2298e804 | 477 | fence_signal_locked(&fence->base); |
ae2a1040 TH |
478 | INIT_LIST_HEAD(&action_list); |
479 | list_splice_init(&fence->seq_passed_actions, | |
480 | &action_list); | |
481 | vmw_fences_perform_actions(fman, &action_list); | |
57c5ee79 TH |
482 | } else |
483 | break; | |
ae2a1040 | 484 | } |
57c5ee79 | 485 | |
57c5ee79 TH |
486 | /* |
487 | * Rerun if the fence goal seqno was updated, and the | |
488 | * hardware might have raced with that update, so that | |
489 | * we missed a fence_goal irq. | |
490 | */ | |
491 | ||
2298e804 | 492 | needs_rerun = vmw_fence_goal_new_locked(fman, seqno); |
57c5ee79 TH |
493 | if (unlikely(needs_rerun)) { |
494 | new_seqno = ioread32(fifo_mem + SVGA_FIFO_FENCE); | |
495 | if (new_seqno != seqno) { | |
496 | seqno = new_seqno; | |
497 | goto rerun; | |
498 | } | |
499 | } | |
2298e804 ML |
500 | |
501 | if (!list_empty(&fman->cleanup_list)) | |
502 | (void) schedule_work(&fman->work); | |
57c5ee79 | 503 | } |
ae2a1040 | 504 | |
2298e804 | 505 | void vmw_fences_update(struct vmw_fence_manager *fman) |
ae2a1040 | 506 | { |
ae2a1040 | 507 | unsigned long irq_flags; |
ae2a1040 TH |
508 | |
509 | spin_lock_irqsave(&fman->lock, irq_flags); | |
2298e804 | 510 | __vmw_fences_update(fman); |
ae2a1040 | 511 | spin_unlock_irqrestore(&fman->lock, irq_flags); |
2298e804 ML |
512 | } |
513 | ||
514 | bool vmw_fence_obj_signaled(struct vmw_fence_obj *fence) | |
515 | { | |
516 | struct vmw_fence_manager *fman = fman_from_fence(fence); | |
ae2a1040 | 517 | |
2298e804 | 518 | if (test_bit(FENCE_FLAG_SIGNALED_BIT, &fence->base.flags)) |
ae2a1040 TH |
519 | return 1; |
520 | ||
c060a4e1 | 521 | vmw_fences_update(fman); |
ae2a1040 | 522 | |
2298e804 | 523 | return fence_is_signaled(&fence->base); |
ae2a1040 TH |
524 | } |
525 | ||
c060a4e1 | 526 | int vmw_fence_obj_wait(struct vmw_fence_obj *fence, bool lazy, |
ae2a1040 TH |
527 | bool interruptible, unsigned long timeout) |
528 | { | |
2298e804 | 529 | long ret = fence_wait_timeout(&fence->base, interruptible, timeout); |
ae2a1040 | 530 | |
2298e804 | 531 | if (likely(ret > 0)) |
ae2a1040 | 532 | return 0; |
2298e804 ML |
533 | else if (ret == 0) |
534 | return -EBUSY; | |
ae2a1040 | 535 | else |
2298e804 | 536 | return ret; |
ae2a1040 TH |
537 | } |
538 | ||
539 | void vmw_fence_obj_flush(struct vmw_fence_obj *fence) | |
540 | { | |
2298e804 | 541 | struct vmw_private *dev_priv = fman_from_fence(fence)->dev_priv; |
ae2a1040 TH |
542 | |
543 | vmw_fifo_ping_host(dev_priv, SVGA_SYNC_GENERIC); | |
544 | } | |
545 | ||
546 | static void vmw_fence_destroy(struct vmw_fence_obj *fence) | |
547 | { | |
2298e804 | 548 | fence_free(&fence->base); |
ae2a1040 TH |
549 | } |
550 | ||
551 | int vmw_fence_create(struct vmw_fence_manager *fman, | |
552 | uint32_t seqno, | |
ae2a1040 TH |
553 | struct vmw_fence_obj **p_fence) |
554 | { | |
ae2a1040 TH |
555 | struct vmw_fence_obj *fence; |
556 | int ret; | |
557 | ||
ae2a1040 | 558 | fence = kzalloc(sizeof(*fence), GFP_KERNEL); |
1f563a6a TH |
559 | if (unlikely(fence == NULL)) |
560 | return -ENOMEM; | |
ae2a1040 | 561 | |
c060a4e1 | 562 | ret = vmw_fence_obj_init(fman, fence, seqno, |
ae2a1040 TH |
563 | vmw_fence_destroy); |
564 | if (unlikely(ret != 0)) | |
565 | goto out_err_init; | |
566 | ||
567 | *p_fence = fence; | |
568 | return 0; | |
569 | ||
570 | out_err_init: | |
571 | kfree(fence); | |
ae2a1040 TH |
572 | return ret; |
573 | } | |
574 | ||
575 | ||
576 | static void vmw_user_fence_destroy(struct vmw_fence_obj *fence) | |
577 | { | |
578 | struct vmw_user_fence *ufence = | |
579 | container_of(fence, struct vmw_user_fence, fence); | |
2298e804 | 580 | struct vmw_fence_manager *fman = fman_from_fence(fence); |
ae2a1040 | 581 | |
35f62a58 | 582 | ttm_base_object_kfree(ufence, base); |
ae2a1040 TH |
583 | /* |
584 | * Free kernel space accounting. | |
585 | */ | |
586 | ttm_mem_global_free(vmw_mem_glob(fman->dev_priv), | |
587 | fman->user_fence_size); | |
588 | } | |
589 | ||
590 | static void vmw_user_fence_base_release(struct ttm_base_object **p_base) | |
591 | { | |
592 | struct ttm_base_object *base = *p_base; | |
593 | struct vmw_user_fence *ufence = | |
594 | container_of(base, struct vmw_user_fence, base); | |
595 | struct vmw_fence_obj *fence = &ufence->fence; | |
596 | ||
597 | *p_base = NULL; | |
598 | vmw_fence_obj_unreference(&fence); | |
599 | } | |
600 | ||
601 | int vmw_user_fence_create(struct drm_file *file_priv, | |
602 | struct vmw_fence_manager *fman, | |
603 | uint32_t seqno, | |
ae2a1040 TH |
604 | struct vmw_fence_obj **p_fence, |
605 | uint32_t *p_handle) | |
606 | { | |
607 | struct ttm_object_file *tfile = vmw_fpriv(file_priv)->tfile; | |
608 | struct vmw_user_fence *ufence; | |
609 | struct vmw_fence_obj *tmp; | |
610 | struct ttm_mem_global *mem_glob = vmw_mem_glob(fman->dev_priv); | |
611 | int ret; | |
612 | ||
613 | /* | |
614 | * Kernel memory space accounting, since this object may | |
615 | * be created by a user-space request. | |
616 | */ | |
617 | ||
618 | ret = ttm_mem_global_alloc(mem_glob, fman->user_fence_size, | |
619 | false, false); | |
620 | if (unlikely(ret != 0)) | |
621 | return ret; | |
622 | ||
623 | ufence = kzalloc(sizeof(*ufence), GFP_KERNEL); | |
624 | if (unlikely(ufence == NULL)) { | |
625 | ret = -ENOMEM; | |
626 | goto out_no_object; | |
627 | } | |
628 | ||
629 | ret = vmw_fence_obj_init(fman, &ufence->fence, seqno, | |
c060a4e1 | 630 | vmw_user_fence_destroy); |
ae2a1040 TH |
631 | if (unlikely(ret != 0)) { |
632 | kfree(ufence); | |
633 | goto out_no_object; | |
634 | } | |
635 | ||
636 | /* | |
637 | * The base object holds a reference which is freed in | |
638 | * vmw_user_fence_base_release. | |
639 | */ | |
640 | tmp = vmw_fence_obj_reference(&ufence->fence); | |
641 | ret = ttm_base_object_init(tfile, &ufence->base, false, | |
642 | VMW_RES_FENCE, | |
643 | &vmw_user_fence_base_release, NULL); | |
644 | ||
645 | ||
646 | if (unlikely(ret != 0)) { | |
647 | /* | |
648 | * Free the base object's reference | |
649 | */ | |
650 | vmw_fence_obj_unreference(&tmp); | |
651 | goto out_err; | |
652 | } | |
653 | ||
654 | *p_fence = &ufence->fence; | |
655 | *p_handle = ufence->base.hash.key; | |
656 | ||
657 | return 0; | |
658 | out_err: | |
659 | tmp = &ufence->fence; | |
660 | vmw_fence_obj_unreference(&tmp); | |
661 | out_no_object: | |
662 | ttm_mem_global_free(mem_glob, fman->user_fence_size); | |
663 | return ret; | |
664 | } | |
665 | ||
666 | ||
667 | /** | |
668 | * vmw_fence_fifo_down - signal all unsignaled fence objects. | |
669 | */ | |
670 | ||
671 | void vmw_fence_fifo_down(struct vmw_fence_manager *fman) | |
672 | { | |
ae2a1040 TH |
673 | struct list_head action_list; |
674 | int ret; | |
675 | ||
676 | /* | |
677 | * The list may be altered while we traverse it, so always | |
678 | * restart when we've released the fman->lock. | |
679 | */ | |
680 | ||
2298e804 | 681 | spin_lock_irq(&fman->lock); |
ae2a1040 TH |
682 | fman->fifo_down = true; |
683 | while (!list_empty(&fman->fence_list)) { | |
684 | struct vmw_fence_obj *fence = | |
685 | list_entry(fman->fence_list.prev, struct vmw_fence_obj, | |
686 | head); | |
2298e804 | 687 | fence_get(&fence->base); |
ae2a1040 TH |
688 | spin_unlock_irq(&fman->lock); |
689 | ||
c060a4e1 | 690 | ret = vmw_fence_obj_wait(fence, false, false, |
ae2a1040 TH |
691 | VMW_FENCE_WAIT_TIMEOUT); |
692 | ||
693 | if (unlikely(ret != 0)) { | |
694 | list_del_init(&fence->head); | |
2298e804 | 695 | fence_signal(&fence->base); |
ae2a1040 TH |
696 | INIT_LIST_HEAD(&action_list); |
697 | list_splice_init(&fence->seq_passed_actions, | |
698 | &action_list); | |
699 | vmw_fences_perform_actions(fman, &action_list); | |
ae2a1040 TH |
700 | } |
701 | ||
ae2a1040 | 702 | BUG_ON(!list_empty(&fence->head)); |
2298e804 ML |
703 | fence_put(&fence->base); |
704 | spin_lock_irq(&fman->lock); | |
ae2a1040 | 705 | } |
2298e804 | 706 | spin_unlock_irq(&fman->lock); |
ae2a1040 TH |
707 | } |
708 | ||
709 | void vmw_fence_fifo_up(struct vmw_fence_manager *fman) | |
710 | { | |
711 | unsigned long irq_flags; | |
712 | ||
713 | spin_lock_irqsave(&fman->lock, irq_flags); | |
714 | fman->fifo_down = false; | |
715 | spin_unlock_irqrestore(&fman->lock, irq_flags); | |
716 | } | |
717 | ||
718 | ||
719 | int vmw_fence_obj_wait_ioctl(struct drm_device *dev, void *data, | |
720 | struct drm_file *file_priv) | |
721 | { | |
722 | struct drm_vmw_fence_wait_arg *arg = | |
723 | (struct drm_vmw_fence_wait_arg *)data; | |
724 | unsigned long timeout; | |
725 | struct ttm_base_object *base; | |
726 | struct vmw_fence_obj *fence; | |
727 | struct ttm_object_file *tfile = vmw_fpriv(file_priv)->tfile; | |
728 | int ret; | |
729 | uint64_t wait_timeout = ((uint64_t)arg->timeout_us * HZ); | |
730 | ||
731 | /* | |
732 | * 64-bit division not present on 32-bit systems, so do an | |
733 | * approximation. (Divide by 1000000). | |
734 | */ | |
735 | ||
736 | wait_timeout = (wait_timeout >> 20) + (wait_timeout >> 24) - | |
737 | (wait_timeout >> 26); | |
738 | ||
739 | if (!arg->cookie_valid) { | |
740 | arg->cookie_valid = 1; | |
741 | arg->kernel_cookie = jiffies + wait_timeout; | |
742 | } | |
743 | ||
744 | base = ttm_base_object_lookup(tfile, arg->handle); | |
745 | if (unlikely(base == NULL)) { | |
746 | printk(KERN_ERR "Wait invalid fence object handle " | |
747 | "0x%08lx.\n", | |
748 | (unsigned long)arg->handle); | |
749 | return -EINVAL; | |
750 | } | |
751 | ||
752 | fence = &(container_of(base, struct vmw_user_fence, base)->fence); | |
753 | ||
754 | timeout = jiffies; | |
755 | if (time_after_eq(timeout, (unsigned long)arg->kernel_cookie)) { | |
c060a4e1 | 756 | ret = ((vmw_fence_obj_signaled(fence)) ? |
ae2a1040 TH |
757 | 0 : -EBUSY); |
758 | goto out; | |
759 | } | |
760 | ||
761 | timeout = (unsigned long)arg->kernel_cookie - timeout; | |
762 | ||
c060a4e1 | 763 | ret = vmw_fence_obj_wait(fence, arg->lazy, true, timeout); |
ae2a1040 TH |
764 | |
765 | out: | |
766 | ttm_base_object_unref(&base); | |
767 | ||
768 | /* | |
769 | * Optionally unref the fence object. | |
770 | */ | |
771 | ||
772 | if (ret == 0 && (arg->wait_options & DRM_VMW_WAIT_OPTION_UNREF)) | |
773 | return ttm_ref_object_base_unref(tfile, arg->handle, | |
774 | TTM_REF_USAGE); | |
775 | return ret; | |
776 | } | |
777 | ||
778 | int vmw_fence_obj_signaled_ioctl(struct drm_device *dev, void *data, | |
779 | struct drm_file *file_priv) | |
780 | { | |
781 | struct drm_vmw_fence_signaled_arg *arg = | |
782 | (struct drm_vmw_fence_signaled_arg *) data; | |
783 | struct ttm_base_object *base; | |
784 | struct vmw_fence_obj *fence; | |
785 | struct vmw_fence_manager *fman; | |
786 | struct ttm_object_file *tfile = vmw_fpriv(file_priv)->tfile; | |
787 | struct vmw_private *dev_priv = vmw_priv(dev); | |
788 | ||
789 | base = ttm_base_object_lookup(tfile, arg->handle); | |
790 | if (unlikely(base == NULL)) { | |
791 | printk(KERN_ERR "Fence signaled invalid fence object handle " | |
792 | "0x%08lx.\n", | |
793 | (unsigned long)arg->handle); | |
794 | return -EINVAL; | |
795 | } | |
796 | ||
797 | fence = &(container_of(base, struct vmw_user_fence, base)->fence); | |
2298e804 | 798 | fman = fman_from_fence(fence); |
ae2a1040 | 799 | |
c060a4e1 | 800 | arg->signaled = vmw_fence_obj_signaled(fence); |
ae2a1040 | 801 | |
c060a4e1 | 802 | arg->signaled_flags = arg->flags; |
2298e804 | 803 | spin_lock_irq(&fman->lock); |
ae2a1040 TH |
804 | arg->passed_seqno = dev_priv->last_read_seqno; |
805 | spin_unlock_irq(&fman->lock); | |
806 | ||
807 | ttm_base_object_unref(&base); | |
808 | ||
809 | return 0; | |
810 | } | |
811 | ||
812 | ||
813 | int vmw_fence_obj_unref_ioctl(struct drm_device *dev, void *data, | |
814 | struct drm_file *file_priv) | |
815 | { | |
816 | struct drm_vmw_fence_arg *arg = | |
817 | (struct drm_vmw_fence_arg *) data; | |
818 | ||
819 | return ttm_ref_object_base_unref(vmw_fpriv(file_priv)->tfile, | |
820 | arg->handle, | |
821 | TTM_REF_USAGE); | |
822 | } | |
57c5ee79 | 823 | |
6b82ef50 TH |
824 | /** |
825 | * vmw_event_fence_fpriv_gone - Remove references to struct drm_file objects | |
826 | * | |
827 | * @fman: Pointer to a struct vmw_fence_manager | |
828 | * @event_list: Pointer to linked list of struct vmw_event_fence_action objects | |
829 | * with pointers to a struct drm_file object about to be closed. | |
830 | * | |
831 | * This function removes all pending fence events with references to a | |
832 | * specific struct drm_file object about to be closed. The caller is required | |
833 | * to pass a list of all struct vmw_event_fence_action objects with such | |
834 | * events attached. This function is typically called before the | |
835 | * struct drm_file object's event management is taken down. | |
836 | */ | |
837 | void vmw_event_fence_fpriv_gone(struct vmw_fence_manager *fman, | |
838 | struct list_head *event_list) | |
839 | { | |
840 | struct vmw_event_fence_action *eaction; | |
841 | struct drm_pending_event *event; | |
842 | unsigned long irq_flags; | |
843 | ||
844 | while (1) { | |
845 | spin_lock_irqsave(&fman->lock, irq_flags); | |
846 | if (list_empty(event_list)) | |
847 | goto out_unlock; | |
848 | eaction = list_first_entry(event_list, | |
849 | struct vmw_event_fence_action, | |
850 | fpriv_head); | |
851 | list_del_init(&eaction->fpriv_head); | |
852 | event = eaction->event; | |
853 | eaction->event = NULL; | |
854 | spin_unlock_irqrestore(&fman->lock, irq_flags); | |
855 | event->destroy(event); | |
856 | } | |
857 | out_unlock: | |
858 | spin_unlock_irqrestore(&fman->lock, irq_flags); | |
859 | } | |
860 | ||
57c5ee79 TH |
861 | |
862 | /** | |
863 | * vmw_event_fence_action_seq_passed | |
864 | * | |
865 | * @action: The struct vmw_fence_action embedded in a struct | |
866 | * vmw_event_fence_action. | |
867 | * | |
868 | * This function is called when the seqno of the fence where @action is | |
869 | * attached has passed. It queues the event on the submitter's event list. | |
870 | * This function is always called from atomic context, and may be called | |
8b7de6aa | 871 | * from irq context. |
57c5ee79 TH |
872 | */ |
873 | static void vmw_event_fence_action_seq_passed(struct vmw_fence_action *action) | |
874 | { | |
875 | struct vmw_event_fence_action *eaction = | |
876 | container_of(action, struct vmw_event_fence_action, action); | |
877 | struct drm_device *dev = eaction->dev; | |
6b82ef50 TH |
878 | struct drm_pending_event *event = eaction->event; |
879 | struct drm_file *file_priv; | |
57c5ee79 TH |
880 | unsigned long irq_flags; |
881 | ||
6b82ef50 TH |
882 | if (unlikely(event == NULL)) |
883 | return; | |
884 | ||
885 | file_priv = event->file_priv; | |
57c5ee79 TH |
886 | spin_lock_irqsave(&dev->event_lock, irq_flags); |
887 | ||
888 | if (likely(eaction->tv_sec != NULL)) { | |
889 | struct timeval tv; | |
890 | ||
891 | do_gettimeofday(&tv); | |
892 | *eaction->tv_sec = tv.tv_sec; | |
893 | *eaction->tv_usec = tv.tv_usec; | |
894 | } | |
895 | ||
6b82ef50 | 896 | list_del_init(&eaction->fpriv_head); |
8b7de6aa | 897 | list_add_tail(&eaction->event->link, &file_priv->event_list); |
6b82ef50 | 898 | eaction->event = NULL; |
57c5ee79 TH |
899 | wake_up_all(&file_priv->event_wait); |
900 | spin_unlock_irqrestore(&dev->event_lock, irq_flags); | |
901 | } | |
902 | ||
903 | /** | |
904 | * vmw_event_fence_action_cleanup | |
905 | * | |
906 | * @action: The struct vmw_fence_action embedded in a struct | |
907 | * vmw_event_fence_action. | |
908 | * | |
909 | * This function is the struct vmw_fence_action destructor. It's typically | |
910 | * called from a workqueue. | |
911 | */ | |
912 | static void vmw_event_fence_action_cleanup(struct vmw_fence_action *action) | |
913 | { | |
914 | struct vmw_event_fence_action *eaction = | |
915 | container_of(action, struct vmw_event_fence_action, action); | |
2298e804 | 916 | struct vmw_fence_manager *fman = fman_from_fence(eaction->fence); |
6b82ef50 TH |
917 | unsigned long irq_flags; |
918 | ||
919 | spin_lock_irqsave(&fman->lock, irq_flags); | |
920 | list_del(&eaction->fpriv_head); | |
921 | spin_unlock_irqrestore(&fman->lock, irq_flags); | |
57c5ee79 TH |
922 | |
923 | vmw_fence_obj_unreference(&eaction->fence); | |
8b7de6aa | 924 | kfree(eaction); |
57c5ee79 TH |
925 | } |
926 | ||
927 | ||
928 | /** | |
929 | * vmw_fence_obj_add_action - Add an action to a fence object. | |
930 | * | |
931 | * @fence - The fence object. | |
932 | * @action - The action to add. | |
933 | * | |
934 | * Note that the action callbacks may be executed before this function | |
935 | * returns. | |
936 | */ | |
94844cf0 | 937 | static void vmw_fence_obj_add_action(struct vmw_fence_obj *fence, |
57c5ee79 TH |
938 | struct vmw_fence_action *action) |
939 | { | |
2298e804 | 940 | struct vmw_fence_manager *fman = fman_from_fence(fence); |
57c5ee79 TH |
941 | unsigned long irq_flags; |
942 | bool run_update = false; | |
943 | ||
944 | mutex_lock(&fman->goal_irq_mutex); | |
945 | spin_lock_irqsave(&fman->lock, irq_flags); | |
946 | ||
947 | fman->pending_actions[action->type]++; | |
2298e804 | 948 | if (fence_is_signaled_locked(&fence->base)) { |
57c5ee79 TH |
949 | struct list_head action_list; |
950 | ||
951 | INIT_LIST_HEAD(&action_list); | |
952 | list_add_tail(&action->head, &action_list); | |
953 | vmw_fences_perform_actions(fman, &action_list); | |
954 | } else { | |
955 | list_add_tail(&action->head, &fence->seq_passed_actions); | |
956 | ||
957 | /* | |
958 | * This function may set fman::seqno_valid, so it must | |
959 | * be run with the goal_irq_mutex held. | |
960 | */ | |
961 | run_update = vmw_fence_goal_check_locked(fence); | |
962 | } | |
963 | ||
964 | spin_unlock_irqrestore(&fman->lock, irq_flags); | |
965 | ||
966 | if (run_update) { | |
967 | if (!fman->goal_irq_on) { | |
968 | fman->goal_irq_on = true; | |
969 | vmw_goal_waiter_add(fman->dev_priv); | |
970 | } | |
971 | vmw_fences_update(fman); | |
972 | } | |
973 | mutex_unlock(&fman->goal_irq_mutex); | |
974 | ||
975 | } | |
976 | ||
977 | /** | |
978 | * vmw_event_fence_action_create - Post an event for sending when a fence | |
979 | * object seqno has passed. | |
980 | * | |
981 | * @file_priv: The file connection on which the event should be posted. | |
982 | * @fence: The fence object on which to post the event. | |
983 | * @event: Event to be posted. This event should've been alloced | |
984 | * using k[mz]alloc, and should've been completely initialized. | |
985 | * @interruptible: Interruptible waits if possible. | |
986 | * | |
987 | * As a side effect, the object pointed to by @event may have been | |
988 | * freed when this function returns. If this function returns with | |
989 | * an error code, the caller needs to free that object. | |
990 | */ | |
991 | ||
8b7de6aa JB |
992 | int vmw_event_fence_action_queue(struct drm_file *file_priv, |
993 | struct vmw_fence_obj *fence, | |
994 | struct drm_pending_event *event, | |
995 | uint32_t *tv_sec, | |
996 | uint32_t *tv_usec, | |
997 | bool interruptible) | |
57c5ee79 | 998 | { |
0c5d3703 | 999 | struct vmw_event_fence_action *eaction; |
2298e804 | 1000 | struct vmw_fence_manager *fman = fman_from_fence(fence); |
6b82ef50 TH |
1001 | struct vmw_fpriv *vmw_fp = vmw_fpriv(file_priv); |
1002 | unsigned long irq_flags; | |
57c5ee79 TH |
1003 | |
1004 | eaction = kzalloc(sizeof(*eaction), GFP_KERNEL); | |
8b7de6aa | 1005 | if (unlikely(eaction == NULL)) |
57c5ee79 | 1006 | return -ENOMEM; |
57c5ee79 | 1007 | |
8b7de6aa | 1008 | eaction->event = event; |
57c5ee79 TH |
1009 | |
1010 | eaction->action.seq_passed = vmw_event_fence_action_seq_passed; | |
1011 | eaction->action.cleanup = vmw_event_fence_action_cleanup; | |
1012 | eaction->action.type = VMW_ACTION_EVENT; | |
1013 | ||
1014 | eaction->fence = vmw_fence_obj_reference(fence); | |
1015 | eaction->dev = fman->dev_priv->dev; | |
57c5ee79 TH |
1016 | eaction->tv_sec = tv_sec; |
1017 | eaction->tv_usec = tv_usec; | |
1018 | ||
6b82ef50 TH |
1019 | spin_lock_irqsave(&fman->lock, irq_flags); |
1020 | list_add_tail(&eaction->fpriv_head, &vmw_fp->fence_events); | |
1021 | spin_unlock_irqrestore(&fman->lock, irq_flags); | |
1022 | ||
57c5ee79 TH |
1023 | vmw_fence_obj_add_action(fence, &eaction->action); |
1024 | ||
1025 | return 0; | |
1026 | } | |
1027 | ||
8b7de6aa JB |
1028 | struct vmw_event_fence_pending { |
1029 | struct drm_pending_event base; | |
1030 | struct drm_vmw_event_fence event; | |
1031 | }; | |
1032 | ||
94844cf0 | 1033 | static int vmw_event_fence_action_create(struct drm_file *file_priv, |
8b7de6aa JB |
1034 | struct vmw_fence_obj *fence, |
1035 | uint32_t flags, | |
1036 | uint64_t user_data, | |
1037 | bool interruptible) | |
1038 | { | |
1039 | struct vmw_event_fence_pending *event; | |
2298e804 ML |
1040 | struct vmw_fence_manager *fman = fman_from_fence(fence); |
1041 | struct drm_device *dev = fman->dev_priv->dev; | |
8b7de6aa JB |
1042 | unsigned long irq_flags; |
1043 | int ret; | |
1044 | ||
1045 | spin_lock_irqsave(&dev->event_lock, irq_flags); | |
1046 | ||
1047 | ret = (file_priv->event_space < sizeof(event->event)) ? -EBUSY : 0; | |
1048 | if (likely(ret == 0)) | |
1049 | file_priv->event_space -= sizeof(event->event); | |
1050 | ||
1051 | spin_unlock_irqrestore(&dev->event_lock, irq_flags); | |
1052 | ||
1053 | if (unlikely(ret != 0)) { | |
1054 | DRM_ERROR("Failed to allocate event space for this file.\n"); | |
1055 | goto out_no_space; | |
1056 | } | |
1057 | ||
1058 | ||
68c4fce7 | 1059 | event = kzalloc(sizeof(*event), GFP_KERNEL); |
8b7de6aa JB |
1060 | if (unlikely(event == NULL)) { |
1061 | DRM_ERROR("Failed to allocate an event.\n"); | |
1062 | ret = -ENOMEM; | |
1063 | goto out_no_event; | |
1064 | } | |
1065 | ||
1066 | event->event.base.type = DRM_VMW_EVENT_FENCE_SIGNALED; | |
1067 | event->event.base.length = sizeof(*event); | |
1068 | event->event.user_data = user_data; | |
1069 | ||
1070 | event->base.event = &event->event.base; | |
1071 | event->base.file_priv = file_priv; | |
1072 | event->base.destroy = (void (*) (struct drm_pending_event *)) kfree; | |
1073 | ||
1074 | ||
1075 | if (flags & DRM_VMW_FE_FLAG_REQ_TIME) | |
1076 | ret = vmw_event_fence_action_queue(file_priv, fence, | |
1077 | &event->base, | |
1078 | &event->event.tv_sec, | |
1079 | &event->event.tv_usec, | |
1080 | interruptible); | |
1081 | else | |
1082 | ret = vmw_event_fence_action_queue(file_priv, fence, | |
1083 | &event->base, | |
1084 | NULL, | |
1085 | NULL, | |
1086 | interruptible); | |
1087 | if (ret != 0) | |
1088 | goto out_no_queue; | |
1089 | ||
1090 | out_no_queue: | |
1091 | event->base.destroy(&event->base); | |
1092 | out_no_event: | |
1093 | spin_lock_irqsave(&dev->event_lock, irq_flags); | |
1094 | file_priv->event_space += sizeof(*event); | |
1095 | spin_unlock_irqrestore(&dev->event_lock, irq_flags); | |
1096 | out_no_space: | |
1097 | return ret; | |
1098 | } | |
1099 | ||
57c5ee79 TH |
1100 | int vmw_fence_event_ioctl(struct drm_device *dev, void *data, |
1101 | struct drm_file *file_priv) | |
1102 | { | |
1103 | struct vmw_private *dev_priv = vmw_priv(dev); | |
1104 | struct drm_vmw_fence_event_arg *arg = | |
1105 | (struct drm_vmw_fence_event_arg *) data; | |
1106 | struct vmw_fence_obj *fence = NULL; | |
1107 | struct vmw_fpriv *vmw_fp = vmw_fpriv(file_priv); | |
1108 | struct drm_vmw_fence_rep __user *user_fence_rep = | |
1109 | (struct drm_vmw_fence_rep __user *)(unsigned long) | |
1110 | arg->fence_rep; | |
1111 | uint32_t handle; | |
57c5ee79 TH |
1112 | int ret; |
1113 | ||
1114 | /* | |
1115 | * Look up an existing fence object, | |
1116 | * and if user-space wants a new reference, | |
1117 | * add one. | |
1118 | */ | |
1119 | if (arg->handle) { | |
1120 | struct ttm_base_object *base = | |
05efb1ab TH |
1121 | ttm_base_object_lookup_for_ref(dev_priv->tdev, |
1122 | arg->handle); | |
57c5ee79 TH |
1123 | |
1124 | if (unlikely(base == NULL)) { | |
1125 | DRM_ERROR("Fence event invalid fence object handle " | |
1126 | "0x%08lx.\n", | |
1127 | (unsigned long)arg->handle); | |
1128 | return -EINVAL; | |
1129 | } | |
1130 | fence = &(container_of(base, struct vmw_user_fence, | |
1131 | base)->fence); | |
1132 | (void) vmw_fence_obj_reference(fence); | |
1133 | ||
1134 | if (user_fence_rep != NULL) { | |
1135 | bool existed; | |
1136 | ||
1137 | ret = ttm_ref_object_add(vmw_fp->tfile, base, | |
1138 | TTM_REF_USAGE, &existed); | |
1139 | if (unlikely(ret != 0)) { | |
1140 | DRM_ERROR("Failed to reference a fence " | |
1141 | "object.\n"); | |
1142 | goto out_no_ref_obj; | |
1143 | } | |
1144 | handle = base->hash.key; | |
1145 | } | |
1146 | ttm_base_object_unref(&base); | |
1147 | } | |
1148 | ||
1149 | /* | |
1150 | * Create a new fence object. | |
1151 | */ | |
1152 | if (!fence) { | |
1153 | ret = vmw_execbuf_fence_commands(file_priv, dev_priv, | |
1154 | &fence, | |
1155 | (user_fence_rep) ? | |
1156 | &handle : NULL); | |
1157 | if (unlikely(ret != 0)) { | |
1158 | DRM_ERROR("Fence event failed to create fence.\n"); | |
1159 | return ret; | |
1160 | } | |
1161 | } | |
1162 | ||
1163 | BUG_ON(fence == NULL); | |
1164 | ||
57c5ee79 TH |
1165 | if (arg->flags & DRM_VMW_FE_FLAG_REQ_TIME) |
1166 | ret = vmw_event_fence_action_create(file_priv, fence, | |
8b7de6aa JB |
1167 | arg->flags, |
1168 | arg->user_data, | |
57c5ee79 TH |
1169 | true); |
1170 | else | |
1171 | ret = vmw_event_fence_action_create(file_priv, fence, | |
8b7de6aa JB |
1172 | arg->flags, |
1173 | arg->user_data, | |
57c5ee79 TH |
1174 | true); |
1175 | ||
1176 | if (unlikely(ret != 0)) { | |
1177 | if (ret != -ERESTARTSYS) | |
1178 | DRM_ERROR("Failed to attach event to fence.\n"); | |
8b7de6aa | 1179 | goto out_no_create; |
57c5ee79 TH |
1180 | } |
1181 | ||
1182 | vmw_execbuf_copy_fence_user(dev_priv, vmw_fp, 0, user_fence_rep, fence, | |
1183 | handle); | |
1184 | vmw_fence_obj_unreference(&fence); | |
1185 | return 0; | |
8b7de6aa | 1186 | out_no_create: |
57c5ee79 TH |
1187 | if (user_fence_rep != NULL) |
1188 | ttm_ref_object_base_unref(vmw_fpriv(file_priv)->tfile, | |
1189 | handle, TTM_REF_USAGE); | |
1190 | out_no_ref_obj: | |
1191 | vmw_fence_obj_unreference(&fence); | |
1192 | return ret; | |
1193 | } |