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1/*
2 * Copyright 2011 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 * on the rights to use, copy, modify, merge, publish, distribute, sub
8 * license, and/or sell copies of the Software, and to permit persons to whom
9 * the Software is furnished to do so, subject to the following conditions:
10 *
11 * The above copyright notice and this permission notice (including the next
12 * paragraph) shall be included in all copies or substantial portions of the
13 * Software.
14 *
15 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
16 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
17 * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL
18 * THE AUTHORS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER
19 * IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
20 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
21 */
22#include "qxl_drv.h"
23#include "qxl_object.h"
24#include <trace/events/fence.h>
25
26/*
27 * drawable cmd cache - allocate a bunch of VRAM pages, suballocate
28 * into 256 byte chunks for now - gives 16 cmds per page.
29 *
30 * use an ida to index into the chunks?
31 */
32/* manage releaseables */
33/* stack them 16 high for now -drawable object is 191 */
34#define RELEASE_SIZE 256
35#define RELEASES_PER_BO (4096 / RELEASE_SIZE)
36/* put an alloc/dealloc surface cmd into one bo and round up to 128 */
37#define SURFACE_RELEASE_SIZE 128
38#define SURFACE_RELEASES_PER_BO (4096 / SURFACE_RELEASE_SIZE)
39
40static const int release_size_per_bo[] = { RELEASE_SIZE, SURFACE_RELEASE_SIZE, RELEASE_SIZE };
41static const int releases_per_bo[] = { RELEASES_PER_BO, SURFACE_RELEASES_PER_BO, RELEASES_PER_BO };
42
43static const char *qxl_get_driver_name(struct fence *fence)
44{
45 return "qxl";
46}
47
48static const char *qxl_get_timeline_name(struct fence *fence)
49{
50 return "release";
51}
52
53static bool qxl_nop_signaling(struct fence *fence)
54{
55 /* fences are always automatically signaled, so just pretend we did this.. */
56 return true;
57}
58
59static long qxl_fence_wait(struct fence *fence, bool intr, signed long timeout)
60{
61 struct qxl_device *qdev;
62 struct qxl_release *release;
63 int count = 0, sc = 0;
64 bool have_drawable_releases;
65 unsigned long cur, end = jiffies + timeout;
66
67 qdev = container_of(fence->lock, struct qxl_device, release_lock);
68 release = container_of(fence, struct qxl_release, base);
69 have_drawable_releases = release->type == QXL_RELEASE_DRAWABLE;
70
71retry:
72 sc++;
73
74 if (fence_is_signaled(fence))
75 goto signaled;
76
77 qxl_io_notify_oom(qdev);
78
79 for (count = 0; count < 11; count++) {
80 if (!qxl_queue_garbage_collect(qdev, true))
81 break;
82
83 if (fence_is_signaled(fence))
84 goto signaled;
85 }
86
87 if (fence_is_signaled(fence))
88 goto signaled;
89
90 if (have_drawable_releases || sc < 4) {
91 if (sc > 2)
92 /* back off */
93 usleep_range(500, 1000);
94
95 if (time_after(jiffies, end))
96 return 0;
97
98 if (have_drawable_releases && sc > 300) {
99 FENCE_WARN(fence, "failed to wait on release %d "
100 "after spincount %d\n",
101 fence->context & ~0xf0000000, sc);
102 goto signaled;
103 }
104 goto retry;
105 }
106 /*
107 * yeah, original sync_obj_wait gave up after 3 spins when
108 * have_drawable_releases is not set.
109 */
110
111signaled:
112 cur = jiffies;
113 if (time_after(cur, end))
114 return 0;
115 return end - cur;
116}
117
118static const struct fence_ops qxl_fence_ops = {
119 .get_driver_name = qxl_get_driver_name,
120 .get_timeline_name = qxl_get_timeline_name,
121 .enable_signaling = qxl_nop_signaling,
122 .wait = qxl_fence_wait,
123};
124
125static int
126qxl_release_alloc(struct qxl_device *qdev, int type,
127 struct qxl_release **ret)
128{
129 struct qxl_release *release;
130 int handle;
131 size_t size = sizeof(*release);
132
133 release = kmalloc(size, GFP_KERNEL);
134 if (!release) {
135 DRM_ERROR("Out of memory\n");
136 return 0;
137 }
138 release->base.ops = NULL;
139 release->type = type;
140 release->release_offset = 0;
141 release->surface_release_id = 0;
142 INIT_LIST_HEAD(&release->bos);
143
144 idr_preload(GFP_KERNEL);
145 spin_lock(&qdev->release_idr_lock);
146 handle = idr_alloc(&qdev->release_idr, release, 1, 0, GFP_NOWAIT);
147 release->base.seqno = ++qdev->release_seqno;
148 spin_unlock(&qdev->release_idr_lock);
149 idr_preload_end();
150 if (handle < 0) {
151 kfree(release);
152 *ret = NULL;
153 return handle;
154 }
155 *ret = release;
156 QXL_INFO(qdev, "allocated release %d\n", handle);
157 release->id = handle;
158 return handle;
159}
160
161static void
162qxl_release_free_list(struct qxl_release *release)
163{
164 while (!list_empty(&release->bos)) {
165 struct qxl_bo_list *entry;
166 struct qxl_bo *bo;
167
168 entry = container_of(release->bos.next,
169 struct qxl_bo_list, tv.head);
170 bo = to_qxl_bo(entry->tv.bo);
171 qxl_bo_unref(&bo);
172 list_del(&entry->tv.head);
173 kfree(entry);
174 }
175}
176
177void
178qxl_release_free(struct qxl_device *qdev,
179 struct qxl_release *release)
180{
181 QXL_INFO(qdev, "release %d, type %d\n", release->id,
182 release->type);
183
184 if (release->surface_release_id)
185 qxl_surface_id_dealloc(qdev, release->surface_release_id);
186
187 spin_lock(&qdev->release_idr_lock);
188 idr_remove(&qdev->release_idr, release->id);
189 spin_unlock(&qdev->release_idr_lock);
190
191 if (release->base.ops) {
192 WARN_ON(list_empty(&release->bos));
193 qxl_release_free_list(release);
194
195 fence_signal(&release->base);
196 fence_put(&release->base);
197 } else {
198 qxl_release_free_list(release);
199 kfree(release);
200 }
201}
202
203static int qxl_release_bo_alloc(struct qxl_device *qdev,
204 struct qxl_bo **bo)
205{
206 int ret;
207 /* pin releases bo's they are too messy to evict */
208 ret = qxl_bo_create(qdev, PAGE_SIZE, false, true,
209 QXL_GEM_DOMAIN_VRAM, NULL,
210 bo);
211 return ret;
212}
213
214int qxl_release_list_add(struct qxl_release *release, struct qxl_bo *bo)
215{
216 struct qxl_bo_list *entry;
217
218 list_for_each_entry(entry, &release->bos, tv.head) {
219 if (entry->tv.bo == &bo->tbo)
220 return 0;
221 }
222
223 entry = kmalloc(sizeof(struct qxl_bo_list), GFP_KERNEL);
224 if (!entry)
225 return -ENOMEM;
226
227 qxl_bo_ref(bo);
228 entry->tv.bo = &bo->tbo;
229 entry->tv.shared = false;
230 list_add_tail(&entry->tv.head, &release->bos);
231 return 0;
232}
233
234static int qxl_release_validate_bo(struct qxl_bo *bo)
235{
236 int ret;
237
238 if (!bo->pin_count) {
239 qxl_ttm_placement_from_domain(bo, bo->type, false);
240 ret = ttm_bo_validate(&bo->tbo, &bo->placement,
241 true, false);
242 if (ret)
243 return ret;
244 }
245
246 ret = reservation_object_reserve_shared(bo->tbo.resv);
247 if (ret)
248 return ret;
249
250 /* allocate a surface for reserved + validated buffers */
251 ret = qxl_bo_check_id(bo->gem_base.dev->dev_private, bo);
252 if (ret)
253 return ret;
254 return 0;
255}
256
257int qxl_release_reserve_list(struct qxl_release *release, bool no_intr)
258{
259 int ret;
260 struct qxl_bo_list *entry;
261
262 /* if only one object on the release its the release itself
263 since these objects are pinned no need to reserve */
264 if (list_is_singular(&release->bos))
265 return 0;
266
267 ret = ttm_eu_reserve_buffers(&release->ticket, &release->bos,
268 !no_intr, NULL);
269 if (ret)
270 return ret;
271
272 list_for_each_entry(entry, &release->bos, tv.head) {
273 struct qxl_bo *bo = to_qxl_bo(entry->tv.bo);
274
275 ret = qxl_release_validate_bo(bo);
276 if (ret) {
277 ttm_eu_backoff_reservation(&release->ticket, &release->bos);
278 return ret;
279 }
280 }
281 return 0;
282}
283
284void qxl_release_backoff_reserve_list(struct qxl_release *release)
285{
286 /* if only one object on the release its the release itself
287 since these objects are pinned no need to reserve */
288 if (list_is_singular(&release->bos))
289 return;
290
291 ttm_eu_backoff_reservation(&release->ticket, &release->bos);
292}
293
294
295int qxl_alloc_surface_release_reserved(struct qxl_device *qdev,
296 enum qxl_surface_cmd_type surface_cmd_type,
297 struct qxl_release *create_rel,
298 struct qxl_release **release)
299{
300 if (surface_cmd_type == QXL_SURFACE_CMD_DESTROY && create_rel) {
301 int idr_ret;
302 struct qxl_bo_list *entry = list_first_entry(&create_rel->bos, struct qxl_bo_list, tv.head);
303 struct qxl_bo *bo;
304 union qxl_release_info *info;
305
306 /* stash the release after the create command */
307 idr_ret = qxl_release_alloc(qdev, QXL_RELEASE_SURFACE_CMD, release);
308 if (idr_ret < 0)
309 return idr_ret;
310 bo = to_qxl_bo(entry->tv.bo);
311
312 (*release)->release_offset = create_rel->release_offset + 64;
313
314 qxl_release_list_add(*release, bo);
315
316 info = qxl_release_map(qdev, *release);
317 info->id = idr_ret;
318 qxl_release_unmap(qdev, *release, info);
319 return 0;
320 }
321
322 return qxl_alloc_release_reserved(qdev, sizeof(struct qxl_surface_cmd),
323 QXL_RELEASE_SURFACE_CMD, release, NULL);
324}
325
326int qxl_alloc_release_reserved(struct qxl_device *qdev, unsigned long size,
327 int type, struct qxl_release **release,
328 struct qxl_bo **rbo)
329{
330 struct qxl_bo *bo;
331 int idr_ret;
332 int ret = 0;
333 union qxl_release_info *info;
334 int cur_idx;
335
336 if (type == QXL_RELEASE_DRAWABLE)
337 cur_idx = 0;
338 else if (type == QXL_RELEASE_SURFACE_CMD)
339 cur_idx = 1;
340 else if (type == QXL_RELEASE_CURSOR_CMD)
341 cur_idx = 2;
342 else {
343 DRM_ERROR("got illegal type: %d\n", type);
344 return -EINVAL;
345 }
346
347 idr_ret = qxl_release_alloc(qdev, type, release);
348 if (idr_ret < 0) {
349 if (rbo)
350 *rbo = NULL;
351 return idr_ret;
352 }
353
354 mutex_lock(&qdev->release_mutex);
355 if (qdev->current_release_bo_offset[cur_idx] + 1 >= releases_per_bo[cur_idx]) {
356 qxl_bo_unref(&qdev->current_release_bo[cur_idx]);
357 qdev->current_release_bo_offset[cur_idx] = 0;
358 qdev->current_release_bo[cur_idx] = NULL;
359 }
360 if (!qdev->current_release_bo[cur_idx]) {
361 ret = qxl_release_bo_alloc(qdev, &qdev->current_release_bo[cur_idx]);
362 if (ret) {
363 mutex_unlock(&qdev->release_mutex);
364 qxl_release_free(qdev, *release);
365 return ret;
366 }
367 }
368
369 bo = qxl_bo_ref(qdev->current_release_bo[cur_idx]);
370
371 (*release)->release_offset = qdev->current_release_bo_offset[cur_idx] * release_size_per_bo[cur_idx];
372 qdev->current_release_bo_offset[cur_idx]++;
373
374 if (rbo)
375 *rbo = bo;
376
377 mutex_unlock(&qdev->release_mutex);
378
379 ret = qxl_release_list_add(*release, bo);
380 qxl_bo_unref(&bo);
381 if (ret) {
382 qxl_release_free(qdev, *release);
383 return ret;
384 }
385
386 info = qxl_release_map(qdev, *release);
387 info->id = idr_ret;
388 qxl_release_unmap(qdev, *release, info);
389
390 return ret;
391}
392
393struct qxl_release *qxl_release_from_id_locked(struct qxl_device *qdev,
394 uint64_t id)
395{
396 struct qxl_release *release;
397
398 spin_lock(&qdev->release_idr_lock);
399 release = idr_find(&qdev->release_idr, id);
400 spin_unlock(&qdev->release_idr_lock);
401 if (!release) {
402 DRM_ERROR("failed to find id in release_idr\n");
403 return NULL;
404 }
405
406 return release;
407}
408
409union qxl_release_info *qxl_release_map(struct qxl_device *qdev,
410 struct qxl_release *release)
411{
412 void *ptr;
413 union qxl_release_info *info;
414 struct qxl_bo_list *entry = list_first_entry(&release->bos, struct qxl_bo_list, tv.head);
415 struct qxl_bo *bo = to_qxl_bo(entry->tv.bo);
416
417 ptr = qxl_bo_kmap_atomic_page(qdev, bo, release->release_offset & PAGE_SIZE);
418 if (!ptr)
419 return NULL;
420 info = ptr + (release->release_offset & ~PAGE_SIZE);
421 return info;
422}
423
424void qxl_release_unmap(struct qxl_device *qdev,
425 struct qxl_release *release,
426 union qxl_release_info *info)
427{
428 struct qxl_bo_list *entry = list_first_entry(&release->bos, struct qxl_bo_list, tv.head);
429 struct qxl_bo *bo = to_qxl_bo(entry->tv.bo);
430 void *ptr;
431
432 ptr = ((void *)info) - (release->release_offset & ~PAGE_SIZE);
433 qxl_bo_kunmap_atomic_page(qdev, bo, ptr);
434}
435
436void qxl_release_fence_buffer_objects(struct qxl_release *release)
437{
438 struct ttm_buffer_object *bo;
439 struct ttm_bo_global *glob;
440 struct ttm_bo_device *bdev;
441 struct ttm_bo_driver *driver;
442 struct qxl_bo *qbo;
443 struct ttm_validate_buffer *entry;
444 struct qxl_device *qdev;
445
446 /* if only one object on the release its the release itself
447 since these objects are pinned no need to reserve */
448 if (list_is_singular(&release->bos) || list_empty(&release->bos))
449 return;
450
451 bo = list_first_entry(&release->bos, struct ttm_validate_buffer, head)->bo;
452 bdev = bo->bdev;
453 qdev = container_of(bdev, struct qxl_device, mman.bdev);
454
455 /*
456 * Since we never really allocated a context and we don't want to conflict,
457 * set the highest bits. This will break if we really allow exporting of dma-bufs.
458 */
459 fence_init(&release->base, &qxl_fence_ops, &qdev->release_lock,
460 release->id | 0xf0000000, release->base.seqno);
461 trace_fence_emit(&release->base);
462
463 driver = bdev->driver;
464 glob = bo->glob;
465
466 spin_lock(&glob->lru_lock);
467
468 list_for_each_entry(entry, &release->bos, head) {
469 bo = entry->bo;
470 qbo = to_qxl_bo(bo);
471
472 reservation_object_add_shared_fence(bo->resv, &release->base);
473 ttm_bo_add_to_lru(bo);
474 __ttm_bo_unreserve(bo);
475 }
476 spin_unlock(&glob->lru_lock);
477 ww_acquire_fini(&release->ticket);
478}
479