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1 | /* |
2 | * Copyright 2013 Red Hat Inc. | |
3 | * | |
4 | * Permission is hereby granted, free of charge, to any person obtaining a | |
5 | * copy of this software and associated documentation files (the "Software"), | |
6 | * to deal in the Software without restriction, including without limitation | |
7 | * the rights to use, copy, modify, merge, publish, distribute, sublicense, | |
8 | * and/or sell copies of the Software, and to permit persons to whom the | |
9 | * Software is furnished to do so, subject to the following conditions: | |
10 | * | |
11 | * The above copyright notice and this permission notice shall be included in | |
12 | * all copies or substantial portions of the Software. | |
13 | * | |
14 | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR | |
15 | * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, | |
16 | * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL | |
17 | * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR | |
18 | * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, | |
19 | * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR | |
20 | * OTHER DEALINGS IN THE SOFTWARE. | |
21 | * | |
22 | * Authors: Dave Airlie | |
23 | * Alon Levy | |
24 | */ | |
25 | ||
26 | /* QXL cmd/ring handling */ | |
27 | ||
28 | #include "qxl_drv.h" | |
29 | #include "qxl_object.h" | |
30 | ||
31 | static int qxl_reap_surface_id(struct qxl_device *qdev, int max_to_reap); | |
32 | ||
33 | struct ring { | |
34 | struct qxl_ring_header header; | |
35 | uint8_t elements[0]; | |
36 | }; | |
37 | ||
38 | struct qxl_ring { | |
39 | struct ring *ring; | |
40 | int element_size; | |
41 | int n_elements; | |
42 | int prod_notify; | |
43 | wait_queue_head_t *push_event; | |
44 | spinlock_t lock; | |
45 | }; | |
46 | ||
47 | void qxl_ring_free(struct qxl_ring *ring) | |
48 | { | |
49 | kfree(ring); | |
50 | } | |
51 | ||
52 | struct qxl_ring * | |
53 | qxl_ring_create(struct qxl_ring_header *header, | |
54 | int element_size, | |
55 | int n_elements, | |
56 | int prod_notify, | |
57 | bool set_prod_notify, | |
58 | wait_queue_head_t *push_event) | |
59 | { | |
60 | struct qxl_ring *ring; | |
61 | ||
62 | ring = kmalloc(sizeof(*ring), GFP_KERNEL); | |
63 | if (!ring) | |
64 | return NULL; | |
65 | ||
66 | ring->ring = (struct ring *)header; | |
67 | ring->element_size = element_size; | |
68 | ring->n_elements = n_elements; | |
69 | ring->prod_notify = prod_notify; | |
70 | ring->push_event = push_event; | |
71 | if (set_prod_notify) | |
72 | header->notify_on_prod = ring->n_elements; | |
73 | spin_lock_init(&ring->lock); | |
74 | return ring; | |
75 | } | |
76 | ||
77 | static int qxl_check_header(struct qxl_ring *ring) | |
78 | { | |
79 | int ret; | |
80 | struct qxl_ring_header *header = &(ring->ring->header); | |
81 | unsigned long flags; | |
82 | spin_lock_irqsave(&ring->lock, flags); | |
83 | ret = header->prod - header->cons < header->num_items; | |
84 | if (ret == 0) | |
85 | header->notify_on_cons = header->cons + 1; | |
86 | spin_unlock_irqrestore(&ring->lock, flags); | |
87 | return ret; | |
88 | } | |
89 | ||
90 | static int qxl_check_idle(struct qxl_ring *ring) | |
91 | { | |
92 | int ret; | |
93 | struct qxl_ring_header *header = &(ring->ring->header); | |
94 | unsigned long flags; | |
95 | spin_lock_irqsave(&ring->lock, flags); | |
96 | ret = header->prod == header->cons; | |
97 | spin_unlock_irqrestore(&ring->lock, flags); | |
98 | return ret; | |
99 | } | |
100 | ||
101 | int qxl_ring_push(struct qxl_ring *ring, | |
102 | const void *new_elt, bool interruptible) | |
103 | { | |
104 | struct qxl_ring_header *header = &(ring->ring->header); | |
105 | uint8_t *elt; | |
106 | int idx, ret; | |
107 | unsigned long flags; | |
108 | spin_lock_irqsave(&ring->lock, flags); | |
109 | if (header->prod - header->cons == header->num_items) { | |
110 | header->notify_on_cons = header->cons + 1; | |
111 | mb(); | |
112 | spin_unlock_irqrestore(&ring->lock, flags); | |
113 | if (!drm_can_sleep()) { | |
114 | while (!qxl_check_header(ring)) | |
115 | udelay(1); | |
116 | } else { | |
117 | if (interruptible) { | |
118 | ret = wait_event_interruptible(*ring->push_event, | |
119 | qxl_check_header(ring)); | |
120 | if (ret) | |
121 | return ret; | |
122 | } else { | |
123 | wait_event(*ring->push_event, | |
124 | qxl_check_header(ring)); | |
125 | } | |
126 | ||
127 | } | |
128 | spin_lock_irqsave(&ring->lock, flags); | |
129 | } | |
130 | ||
131 | idx = header->prod & (ring->n_elements - 1); | |
132 | elt = ring->ring->elements + idx * ring->element_size; | |
133 | ||
134 | memcpy((void *)elt, new_elt, ring->element_size); | |
135 | ||
136 | header->prod++; | |
137 | ||
138 | mb(); | |
139 | ||
140 | if (header->prod == header->notify_on_prod) | |
141 | outb(0, ring->prod_notify); | |
142 | ||
143 | spin_unlock_irqrestore(&ring->lock, flags); | |
144 | return 0; | |
145 | } | |
146 | ||
147 | bool qxl_ring_pop(struct qxl_ring *ring, | |
148 | void *element) | |
149 | { | |
150 | volatile struct qxl_ring_header *header = &(ring->ring->header); | |
151 | volatile uint8_t *ring_elt; | |
152 | int idx; | |
153 | unsigned long flags; | |
154 | spin_lock_irqsave(&ring->lock, flags); | |
155 | if (header->cons == header->prod) { | |
156 | header->notify_on_prod = header->cons + 1; | |
157 | spin_unlock_irqrestore(&ring->lock, flags); | |
158 | return false; | |
159 | } | |
160 | ||
161 | idx = header->cons & (ring->n_elements - 1); | |
162 | ring_elt = ring->ring->elements + idx * ring->element_size; | |
163 | ||
164 | memcpy(element, (void *)ring_elt, ring->element_size); | |
165 | ||
166 | header->cons++; | |
167 | ||
168 | spin_unlock_irqrestore(&ring->lock, flags); | |
169 | return true; | |
170 | } | |
171 | ||
172 | void qxl_ring_wait_idle(struct qxl_ring *ring) | |
173 | { | |
174 | struct qxl_ring_header *header = &(ring->ring->header); | |
175 | unsigned long flags; | |
176 | ||
177 | spin_lock_irqsave(&ring->lock, flags); | |
178 | if (ring->ring->header.cons < ring->ring->header.prod) { | |
179 | header->notify_on_cons = header->prod; | |
180 | mb(); | |
181 | spin_unlock_irqrestore(&ring->lock, flags); | |
182 | wait_event_interruptible(*ring->push_event, | |
183 | qxl_check_idle(ring)); | |
184 | spin_lock_irqsave(&ring->lock, flags); | |
185 | } | |
186 | spin_unlock_irqrestore(&ring->lock, flags); | |
187 | } | |
188 | ||
189 | int | |
190 | qxl_push_command_ring_release(struct qxl_device *qdev, struct qxl_release *release, | |
191 | uint32_t type, bool interruptible) | |
192 | { | |
193 | struct qxl_command cmd; | |
194 | ||
195 | cmd.type = type; | |
196 | cmd.data = qxl_bo_physical_address(qdev, release->bos[0], release->release_offset); | |
197 | ||
198 | return qxl_ring_push(qdev->command_ring, &cmd, interruptible); | |
199 | } | |
200 | ||
201 | int | |
202 | qxl_push_cursor_ring_release(struct qxl_device *qdev, struct qxl_release *release, | |
203 | uint32_t type, bool interruptible) | |
204 | { | |
205 | struct qxl_command cmd; | |
206 | ||
207 | cmd.type = type; | |
208 | cmd.data = qxl_bo_physical_address(qdev, release->bos[0], release->release_offset); | |
209 | ||
210 | return qxl_ring_push(qdev->cursor_ring, &cmd, interruptible); | |
211 | } | |
212 | ||
213 | bool qxl_queue_garbage_collect(struct qxl_device *qdev, bool flush) | |
214 | { | |
215 | if (!qxl_check_idle(qdev->release_ring)) { | |
216 | queue_work(qdev->gc_queue, &qdev->gc_work); | |
217 | if (flush) | |
218 | flush_work(&qdev->gc_work); | |
219 | return true; | |
220 | } | |
221 | return false; | |
222 | } | |
223 | ||
224 | int qxl_garbage_collect(struct qxl_device *qdev) | |
225 | { | |
226 | struct qxl_release *release; | |
227 | uint64_t id, next_id; | |
228 | int i = 0; | |
229 | int ret; | |
230 | union qxl_release_info *info; | |
231 | ||
232 | while (qxl_ring_pop(qdev->release_ring, &id)) { | |
233 | QXL_INFO(qdev, "popped %lld\n", id); | |
234 | while (id) { | |
235 | release = qxl_release_from_id_locked(qdev, id); | |
236 | if (release == NULL) | |
237 | break; | |
238 | ||
239 | ret = qxl_release_reserve(qdev, release, false); | |
240 | if (ret) { | |
241 | qxl_io_log(qdev, "failed to reserve release on garbage collect %lld\n", id); | |
242 | DRM_ERROR("failed to reserve release %lld\n", id); | |
243 | } | |
244 | ||
245 | info = qxl_release_map(qdev, release); | |
246 | next_id = info->next; | |
247 | qxl_release_unmap(qdev, release, info); | |
248 | ||
249 | qxl_release_unreserve(qdev, release); | |
250 | QXL_INFO(qdev, "popped %lld, next %lld\n", id, | |
251 | next_id); | |
252 | ||
253 | switch (release->type) { | |
254 | case QXL_RELEASE_DRAWABLE: | |
255 | case QXL_RELEASE_SURFACE_CMD: | |
256 | case QXL_RELEASE_CURSOR_CMD: | |
257 | break; | |
258 | default: | |
259 | DRM_ERROR("unexpected release type\n"); | |
260 | break; | |
261 | } | |
262 | id = next_id; | |
263 | ||
264 | qxl_release_free(qdev, release); | |
265 | ++i; | |
266 | } | |
267 | } | |
268 | ||
269 | QXL_INFO(qdev, "%s: %lld\n", __func__, i); | |
270 | ||
271 | return i; | |
272 | } | |
273 | ||
274 | int qxl_alloc_bo_reserved(struct qxl_device *qdev, unsigned long size, | |
275 | struct qxl_bo **_bo) | |
276 | { | |
277 | struct qxl_bo *bo; | |
278 | int ret; | |
279 | ||
280 | ret = qxl_bo_create(qdev, size, false /* not kernel - device */, | |
281 | QXL_GEM_DOMAIN_VRAM, NULL, &bo); | |
282 | if (ret) { | |
283 | DRM_ERROR("failed to allocate VRAM BO\n"); | |
284 | return ret; | |
285 | } | |
286 | ret = qxl_bo_reserve(bo, false); | |
287 | if (unlikely(ret != 0)) | |
288 | goto out_unref; | |
289 | ||
290 | *_bo = bo; | |
291 | return 0; | |
292 | out_unref: | |
293 | qxl_bo_unref(&bo); | |
294 | return 0; | |
295 | } | |
296 | ||
297 | static int wait_for_io_cmd_user(struct qxl_device *qdev, uint8_t val, long port) | |
298 | { | |
299 | int irq_num; | |
300 | long addr = qdev->io_base + port; | |
301 | int ret; | |
302 | ||
303 | mutex_lock(&qdev->async_io_mutex); | |
304 | irq_num = atomic_read(&qdev->irq_received_io_cmd); | |
305 | ||
306 | ||
307 | if (qdev->last_sent_io_cmd > irq_num) { | |
308 | ret = wait_event_interruptible(qdev->io_cmd_event, | |
309 | atomic_read(&qdev->irq_received_io_cmd) > irq_num); | |
310 | if (ret) | |
311 | goto out; | |
312 | irq_num = atomic_read(&qdev->irq_received_io_cmd); | |
313 | } | |
314 | outb(val, addr); | |
315 | qdev->last_sent_io_cmd = irq_num + 1; | |
316 | ret = wait_event_interruptible(qdev->io_cmd_event, | |
317 | atomic_read(&qdev->irq_received_io_cmd) > irq_num); | |
318 | out: | |
319 | mutex_unlock(&qdev->async_io_mutex); | |
320 | return ret; | |
321 | } | |
322 | ||
323 | static void wait_for_io_cmd(struct qxl_device *qdev, uint8_t val, long port) | |
324 | { | |
325 | int ret; | |
326 | ||
327 | restart: | |
328 | ret = wait_for_io_cmd_user(qdev, val, port); | |
329 | if (ret == -ERESTARTSYS) | |
330 | goto restart; | |
331 | } | |
332 | ||
333 | int qxl_io_update_area(struct qxl_device *qdev, struct qxl_bo *surf, | |
334 | const struct qxl_rect *area) | |
335 | { | |
336 | int surface_id; | |
337 | uint32_t surface_width, surface_height; | |
338 | int ret; | |
339 | ||
340 | if (!surf->hw_surf_alloc) | |
341 | DRM_ERROR("got io update area with no hw surface\n"); | |
342 | ||
343 | if (surf->is_primary) | |
344 | surface_id = 0; | |
345 | else | |
346 | surface_id = surf->surface_id; | |
347 | surface_width = surf->surf.width; | |
348 | surface_height = surf->surf.height; | |
349 | ||
350 | if (area->left < 0 || area->top < 0 || | |
351 | area->right > surface_width || area->bottom > surface_height) { | |
352 | qxl_io_log(qdev, "%s: not doing area update for " | |
353 | "%d, (%d,%d,%d,%d) (%d,%d)\n", __func__, surface_id, area->left, | |
354 | area->top, area->right, area->bottom, surface_width, surface_height); | |
355 | return -EINVAL; | |
356 | } | |
357 | mutex_lock(&qdev->update_area_mutex); | |
358 | qdev->ram_header->update_area = *area; | |
359 | qdev->ram_header->update_surface = surface_id; | |
360 | ret = wait_for_io_cmd_user(qdev, 0, QXL_IO_UPDATE_AREA_ASYNC); | |
361 | mutex_unlock(&qdev->update_area_mutex); | |
362 | return ret; | |
363 | } | |
364 | ||
365 | void qxl_io_notify_oom(struct qxl_device *qdev) | |
366 | { | |
367 | outb(0, qdev->io_base + QXL_IO_NOTIFY_OOM); | |
368 | } | |
369 | ||
370 | void qxl_io_flush_release(struct qxl_device *qdev) | |
371 | { | |
372 | outb(0, qdev->io_base + QXL_IO_FLUSH_RELEASE); | |
373 | } | |
374 | ||
375 | void qxl_io_flush_surfaces(struct qxl_device *qdev) | |
376 | { | |
377 | wait_for_io_cmd(qdev, 0, QXL_IO_FLUSH_SURFACES_ASYNC); | |
378 | } | |
379 | ||
380 | ||
381 | void qxl_io_destroy_primary(struct qxl_device *qdev) | |
382 | { | |
383 | wait_for_io_cmd(qdev, 0, QXL_IO_DESTROY_PRIMARY_ASYNC); | |
384 | } | |
385 | ||
386 | void qxl_io_create_primary(struct qxl_device *qdev, unsigned width, | |
387 | unsigned height, unsigned offset, struct qxl_bo *bo) | |
388 | { | |
389 | struct qxl_surface_create *create; | |
390 | ||
391 | QXL_INFO(qdev, "%s: qdev %p, ram_header %p\n", __func__, qdev, | |
392 | qdev->ram_header); | |
393 | create = &qdev->ram_header->create_surface; | |
394 | create->format = bo->surf.format; | |
395 | create->width = width; | |
396 | create->height = height; | |
397 | create->stride = bo->surf.stride; | |
398 | create->mem = qxl_bo_physical_address(qdev, bo, offset); | |
399 | ||
400 | QXL_INFO(qdev, "%s: mem = %llx, from %p\n", __func__, create->mem, | |
401 | bo->kptr); | |
402 | ||
403 | create->flags = QXL_SURF_FLAG_KEEP_DATA; | |
404 | create->type = QXL_SURF_TYPE_PRIMARY; | |
405 | ||
406 | wait_for_io_cmd(qdev, 0, QXL_IO_CREATE_PRIMARY_ASYNC); | |
407 | } | |
408 | ||
409 | void qxl_io_memslot_add(struct qxl_device *qdev, uint8_t id) | |
410 | { | |
411 | QXL_INFO(qdev, "qxl_memslot_add %d\n", id); | |
412 | wait_for_io_cmd(qdev, id, QXL_IO_MEMSLOT_ADD_ASYNC); | |
413 | } | |
414 | ||
415 | void qxl_io_log(struct qxl_device *qdev, const char *fmt, ...) | |
416 | { | |
417 | va_list args; | |
418 | ||
419 | va_start(args, fmt); | |
420 | vsnprintf(qdev->ram_header->log_buf, QXL_LOG_BUF_SIZE, fmt, args); | |
421 | va_end(args); | |
422 | /* | |
423 | * DO not do a DRM output here - this will call printk, which will | |
424 | * call back into qxl for rendering (qxl_fb) | |
425 | */ | |
426 | outb(0, qdev->io_base + QXL_IO_LOG); | |
427 | } | |
428 | ||
429 | void qxl_io_reset(struct qxl_device *qdev) | |
430 | { | |
431 | outb(0, qdev->io_base + QXL_IO_RESET); | |
432 | } | |
433 | ||
434 | void qxl_io_monitors_config(struct qxl_device *qdev) | |
435 | { | |
436 | qxl_io_log(qdev, "%s: %d [%dx%d+%d+%d]\n", __func__, | |
437 | qdev->monitors_config ? | |
438 | qdev->monitors_config->count : -1, | |
439 | qdev->monitors_config && qdev->monitors_config->count ? | |
440 | qdev->monitors_config->heads[0].width : -1, | |
441 | qdev->monitors_config && qdev->monitors_config->count ? | |
442 | qdev->monitors_config->heads[0].height : -1, | |
443 | qdev->monitors_config && qdev->monitors_config->count ? | |
444 | qdev->monitors_config->heads[0].x : -1, | |
445 | qdev->monitors_config && qdev->monitors_config->count ? | |
446 | qdev->monitors_config->heads[0].y : -1 | |
447 | ); | |
448 | ||
449 | wait_for_io_cmd(qdev, 0, QXL_IO_MONITORS_CONFIG_ASYNC); | |
450 | } | |
451 | ||
452 | int qxl_surface_id_alloc(struct qxl_device *qdev, | |
453 | struct qxl_bo *surf) | |
454 | { | |
455 | uint32_t handle = -ENOMEM; | |
456 | int idr_ret; | |
457 | int count = 0; | |
458 | again: | |
459 | if (idr_pre_get(&qdev->surf_id_idr, GFP_ATOMIC) == 0) { | |
460 | DRM_ERROR("Out of memory for surf idr\n"); | |
461 | kfree(surf); | |
462 | goto alloc_fail; | |
463 | } | |
464 | ||
465 | spin_lock(&qdev->surf_id_idr_lock); | |
466 | idr_ret = idr_get_new_above(&qdev->surf_id_idr, NULL, 1, &handle); | |
467 | spin_unlock(&qdev->surf_id_idr_lock); | |
468 | ||
469 | if (idr_ret == -EAGAIN) | |
470 | goto again; | |
471 | ||
472 | if (handle >= qdev->rom->n_surfaces) { | |
473 | count++; | |
474 | spin_lock(&qdev->surf_id_idr_lock); | |
475 | idr_remove(&qdev->surf_id_idr, handle); | |
476 | spin_unlock(&qdev->surf_id_idr_lock); | |
477 | qxl_reap_surface_id(qdev, 2); | |
478 | goto again; | |
479 | } | |
480 | surf->surface_id = handle; | |
481 | ||
482 | spin_lock(&qdev->surf_id_idr_lock); | |
483 | qdev->last_alloced_surf_id = handle; | |
484 | spin_unlock(&qdev->surf_id_idr_lock); | |
485 | alloc_fail: | |
486 | return 0; | |
487 | } | |
488 | ||
489 | void qxl_surface_id_dealloc(struct qxl_device *qdev, | |
490 | uint32_t surface_id) | |
491 | { | |
492 | spin_lock(&qdev->surf_id_idr_lock); | |
493 | idr_remove(&qdev->surf_id_idr, surface_id); | |
494 | spin_unlock(&qdev->surf_id_idr_lock); | |
495 | } | |
496 | ||
497 | int qxl_hw_surface_alloc(struct qxl_device *qdev, | |
498 | struct qxl_bo *surf, | |
499 | struct ttm_mem_reg *new_mem) | |
500 | { | |
501 | struct qxl_surface_cmd *cmd; | |
502 | struct qxl_release *release; | |
503 | int ret; | |
504 | ||
505 | if (surf->hw_surf_alloc) | |
506 | return 0; | |
507 | ||
508 | ret = qxl_alloc_surface_release_reserved(qdev, QXL_SURFACE_CMD_CREATE, | |
509 | NULL, | |
510 | &release); | |
511 | if (ret) | |
512 | return ret; | |
513 | ||
514 | cmd = (struct qxl_surface_cmd *)qxl_release_map(qdev, release); | |
515 | cmd->type = QXL_SURFACE_CMD_CREATE; | |
516 | cmd->u.surface_create.format = surf->surf.format; | |
517 | cmd->u.surface_create.width = surf->surf.width; | |
518 | cmd->u.surface_create.height = surf->surf.height; | |
519 | cmd->u.surface_create.stride = surf->surf.stride; | |
520 | if (new_mem) { | |
521 | int slot_id = surf->type == QXL_GEM_DOMAIN_VRAM ? qdev->main_mem_slot : qdev->surfaces_mem_slot; | |
522 | struct qxl_memslot *slot = &(qdev->mem_slots[slot_id]); | |
523 | ||
524 | /* TODO - need to hold one of the locks to read tbo.offset */ | |
525 | cmd->u.surface_create.data = slot->high_bits; | |
526 | ||
527 | cmd->u.surface_create.data |= (new_mem->start << PAGE_SHIFT) + surf->tbo.bdev->man[new_mem->mem_type].gpu_offset; | |
528 | } else | |
529 | cmd->u.surface_create.data = qxl_bo_physical_address(qdev, surf, 0); | |
530 | cmd->surface_id = surf->surface_id; | |
531 | qxl_release_unmap(qdev, release, &cmd->release_info); | |
532 | ||
533 | surf->surf_create = release; | |
534 | ||
535 | /* no need to add a release to the fence for this bo, | |
536 | since it is only released when we ask to destroy the surface | |
537 | and it would never signal otherwise */ | |
538 | qxl_fence_releaseable(qdev, release); | |
539 | ||
540 | qxl_push_command_ring_release(qdev, release, QXL_CMD_SURFACE, false); | |
541 | ||
542 | qxl_release_unreserve(qdev, release); | |
543 | ||
544 | surf->hw_surf_alloc = true; | |
545 | spin_lock(&qdev->surf_id_idr_lock); | |
546 | idr_replace(&qdev->surf_id_idr, surf, surf->surface_id); | |
547 | spin_unlock(&qdev->surf_id_idr_lock); | |
548 | return 0; | |
549 | } | |
550 | ||
551 | int qxl_hw_surface_dealloc(struct qxl_device *qdev, | |
552 | struct qxl_bo *surf) | |
553 | { | |
554 | struct qxl_surface_cmd *cmd; | |
555 | struct qxl_release *release; | |
556 | int ret; | |
557 | int id; | |
558 | ||
559 | if (!surf->hw_surf_alloc) | |
560 | return 0; | |
561 | ||
562 | ret = qxl_alloc_surface_release_reserved(qdev, QXL_SURFACE_CMD_DESTROY, | |
563 | surf->surf_create, | |
564 | &release); | |
565 | if (ret) | |
566 | return ret; | |
567 | ||
568 | surf->surf_create = NULL; | |
569 | /* remove the surface from the idr, but not the surface id yet */ | |
570 | spin_lock(&qdev->surf_id_idr_lock); | |
571 | idr_replace(&qdev->surf_id_idr, NULL, surf->surface_id); | |
572 | spin_unlock(&qdev->surf_id_idr_lock); | |
573 | surf->hw_surf_alloc = false; | |
574 | ||
575 | id = surf->surface_id; | |
576 | surf->surface_id = 0; | |
577 | ||
578 | release->surface_release_id = id; | |
579 | cmd = (struct qxl_surface_cmd *)qxl_release_map(qdev, release); | |
580 | cmd->type = QXL_SURFACE_CMD_DESTROY; | |
581 | cmd->surface_id = id; | |
582 | qxl_release_unmap(qdev, release, &cmd->release_info); | |
583 | ||
584 | qxl_fence_releaseable(qdev, release); | |
585 | ||
586 | qxl_push_command_ring_release(qdev, release, QXL_CMD_SURFACE, false); | |
587 | ||
588 | qxl_release_unreserve(qdev, release); | |
589 | ||
590 | ||
591 | return 0; | |
592 | } | |
593 | ||
594 | int qxl_update_surface(struct qxl_device *qdev, struct qxl_bo *surf) | |
595 | { | |
596 | struct qxl_rect rect; | |
597 | int ret; | |
598 | ||
599 | /* if we are evicting, we need to make sure the surface is up | |
600 | to date */ | |
601 | rect.left = 0; | |
602 | rect.right = surf->surf.width; | |
603 | rect.top = 0; | |
604 | rect.bottom = surf->surf.height; | |
605 | retry: | |
606 | ret = qxl_io_update_area(qdev, surf, &rect); | |
607 | if (ret == -ERESTARTSYS) | |
608 | goto retry; | |
609 | return ret; | |
610 | } | |
611 | ||
612 | void qxl_surface_evict_locked(struct qxl_device *qdev, struct qxl_bo *surf, bool do_update_area) | |
613 | { | |
614 | /* no need to update area if we are just freeing the surface normally */ | |
615 | if (do_update_area) | |
616 | qxl_update_surface(qdev, surf); | |
617 | ||
618 | /* nuke the surface id at the hw */ | |
619 | qxl_hw_surface_dealloc(qdev, surf); | |
620 | } | |
621 | ||
622 | void qxl_surface_evict(struct qxl_device *qdev, struct qxl_bo *surf, bool do_update_area) | |
623 | { | |
624 | mutex_lock(&qdev->surf_evict_mutex); | |
625 | qxl_surface_evict_locked(qdev, surf, do_update_area); | |
626 | mutex_unlock(&qdev->surf_evict_mutex); | |
627 | } | |
628 | ||
629 | static int qxl_reap_surf(struct qxl_device *qdev, struct qxl_bo *surf, bool stall) | |
630 | { | |
631 | int ret; | |
632 | ||
633 | ret = qxl_bo_reserve(surf, false); | |
634 | if (ret == -EBUSY) | |
635 | return -EBUSY; | |
636 | ||
637 | if (surf->fence.num_active_releases > 0 && stall == false) { | |
638 | qxl_bo_unreserve(surf); | |
639 | return -EBUSY; | |
640 | } | |
641 | ||
642 | if (stall) | |
643 | mutex_unlock(&qdev->surf_evict_mutex); | |
644 | ||
645 | spin_lock(&surf->tbo.bdev->fence_lock); | |
646 | ret = ttm_bo_wait(&surf->tbo, true, true, !stall); | |
647 | spin_unlock(&surf->tbo.bdev->fence_lock); | |
648 | ||
649 | if (stall) | |
650 | mutex_lock(&qdev->surf_evict_mutex); | |
651 | if (ret == -EBUSY) { | |
652 | qxl_bo_unreserve(surf); | |
653 | return -EBUSY; | |
654 | } | |
655 | ||
656 | qxl_surface_evict_locked(qdev, surf, true); | |
657 | qxl_bo_unreserve(surf); | |
658 | return 0; | |
659 | } | |
660 | ||
661 | static int qxl_reap_surface_id(struct qxl_device *qdev, int max_to_reap) | |
662 | { | |
663 | int num_reaped = 0; | |
664 | int i, ret; | |
665 | bool stall = false; | |
666 | int start = 0; | |
667 | ||
668 | mutex_lock(&qdev->surf_evict_mutex); | |
669 | again: | |
670 | ||
671 | spin_lock(&qdev->surf_id_idr_lock); | |
672 | start = qdev->last_alloced_surf_id + 1; | |
673 | spin_unlock(&qdev->surf_id_idr_lock); | |
674 | ||
675 | for (i = start; i < start + qdev->rom->n_surfaces; i++) { | |
676 | void *objptr; | |
677 | int surfid = i % qdev->rom->n_surfaces; | |
678 | ||
679 | /* this avoids the case where the objects is in the | |
680 | idr but has been evicted half way - its makes | |
681 | the idr lookup atomic with the eviction */ | |
682 | spin_lock(&qdev->surf_id_idr_lock); | |
683 | objptr = idr_find(&qdev->surf_id_idr, surfid); | |
684 | spin_unlock(&qdev->surf_id_idr_lock); | |
685 | ||
686 | if (!objptr) | |
687 | continue; | |
688 | ||
689 | ret = qxl_reap_surf(qdev, objptr, stall); | |
690 | if (ret == 0) | |
691 | num_reaped++; | |
692 | if (num_reaped >= max_to_reap) | |
693 | break; | |
694 | } | |
695 | if (num_reaped == 0 && stall == false) { | |
696 | stall = true; | |
697 | goto again; | |
698 | } | |
699 | ||
700 | mutex_unlock(&qdev->surf_evict_mutex); | |
701 | if (num_reaped) { | |
702 | usleep_range(500, 1000); | |
703 | qxl_queue_garbage_collect(qdev, true); | |
704 | } | |
705 | ||
706 | return 0; | |
707 | } |