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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
25/*
26 * drawable cmd cache - allocate a bunch of VRAM pages, suballocate
27 * into 256 byte chunks for now - gives 16 cmds per page.
28 *
29 * use an ida to index into the chunks?
30 */
31/* manage releaseables */
32/* stack them 16 high for now -drawable object is 191 */
33#define RELEASE_SIZE 256
34#define RELEASES_PER_BO (4096 / RELEASE_SIZE)
35/* put an alloc/dealloc surface cmd into one bo and round up to 128 */
36#define SURFACE_RELEASE_SIZE 128
37#define SURFACE_RELEASES_PER_BO (4096 / SURFACE_RELEASE_SIZE)
38
39static const int release_size_per_bo[] = { RELEASE_SIZE, SURFACE_RELEASE_SIZE, RELEASE_SIZE };
40static const int releases_per_bo[] = { RELEASES_PER_BO, SURFACE_RELEASES_PER_BO, RELEASES_PER_BO };
41
42static uint64_t
43qxl_release_alloc(struct qxl_device *qdev, int type,
44 struct qxl_release **ret)
45{
46 struct qxl_release *release;
47 int handle;
48 size_t size = sizeof(*release);
49 int idr_ret;
50
51 release = kmalloc(size, GFP_KERNEL);
52 if (!release) {
53 DRM_ERROR("Out of memory\n");
54 return 0;
55 }
56 release->type = type;
57 release->release_offset = 0;
58 release->surface_release_id = 0;
59 INIT_LIST_HEAD(&release->bos);
60
61 idr_preload(GFP_KERNEL);
62 spin_lock(&qdev->release_idr_lock);
63 idr_ret = idr_alloc(&qdev->release_idr, release, 1, 0, GFP_NOWAIT);
64 spin_unlock(&qdev->release_idr_lock);
65 idr_preload_end();
66 handle = idr_ret;
67 if (idr_ret < 0)
68 goto release_fail;
69 *ret = release;
70 QXL_INFO(qdev, "allocated release %lld\n", handle);
71 release->id = handle;
72release_fail:
73
74 return handle;
75}
76
77void
78qxl_release_free(struct qxl_device *qdev,
79 struct qxl_release *release)
80{
81 struct qxl_bo_list *entry, *tmp;
82 QXL_INFO(qdev, "release %d, type %d\n", release->id,
83 release->type);
84
85 if (release->surface_release_id)
86 qxl_surface_id_dealloc(qdev, release->surface_release_id);
87
88 list_for_each_entry_safe(entry, tmp, &release->bos, tv.head) {
89 struct qxl_bo *bo = to_qxl_bo(entry->tv.bo);
90 QXL_INFO(qdev, "release %llx\n",
91 drm_vma_node_offset_addr(&entry->tv.bo->vma_node)
92 - DRM_FILE_OFFSET);
93 qxl_fence_remove_release(&bo->fence, release->id);
94 qxl_bo_unref(&bo);
95 kfree(entry);
96 }
97 spin_lock(&qdev->release_idr_lock);
98 idr_remove(&qdev->release_idr, release->id);
99 spin_unlock(&qdev->release_idr_lock);
100 kfree(release);
101}
102
103static int qxl_release_bo_alloc(struct qxl_device *qdev,
104 struct qxl_bo **bo)
105{
106 int ret;
107 /* pin releases bo's they are too messy to evict */
108 ret = qxl_bo_create(qdev, PAGE_SIZE, false, true,
109 QXL_GEM_DOMAIN_VRAM, NULL,
110 bo);
111 return ret;
112}
113
114int qxl_release_list_add(struct qxl_release *release, struct qxl_bo *bo)
115{
116 struct qxl_bo_list *entry;
117
118 list_for_each_entry(entry, &release->bos, tv.head) {
119 if (entry->tv.bo == &bo->tbo)
120 return 0;
121 }
122
123 entry = kmalloc(sizeof(struct qxl_bo_list), GFP_KERNEL);
124 if (!entry)
125 return -ENOMEM;
126
127 qxl_bo_ref(bo);
128 entry->tv.bo = &bo->tbo;
129 list_add_tail(&entry->tv.head, &release->bos);
130 return 0;
131}
132
133static int qxl_release_validate_bo(struct qxl_bo *bo)
134{
135 int ret;
136
137 if (!bo->pin_count) {
138 qxl_ttm_placement_from_domain(bo, bo->type, false);
139 ret = ttm_bo_validate(&bo->tbo, &bo->placement,
140 true, false);
141 if (ret)
142 return ret;
143 }
144
145 /* allocate a surface for reserved + validated buffers */
146 ret = qxl_bo_check_id(bo->gem_base.dev->dev_private, bo);
147 if (ret)
148 return ret;
149 return 0;
150}
151
152int qxl_release_reserve_list(struct qxl_release *release, bool no_intr)
153{
154 int ret;
155 struct qxl_bo_list *entry;
156
157 /* if only one object on the release its the release itself
158 since these objects are pinned no need to reserve */
159 if (list_is_singular(&release->bos))
160 return 0;
161
162 ret = ttm_eu_reserve_buffers(&release->ticket, &release->bos);
163 if (ret)
164 return ret;
165
166 list_for_each_entry(entry, &release->bos, tv.head) {
167 struct qxl_bo *bo = to_qxl_bo(entry->tv.bo);
168
169 ret = qxl_release_validate_bo(bo);
170 if (ret) {
171 ttm_eu_backoff_reservation(&release->ticket, &release->bos);
172 return ret;
173 }
174 }
175 return 0;
176}
177
178void qxl_release_backoff_reserve_list(struct qxl_release *release)
179{
180 /* if only one object on the release its the release itself
181 since these objects are pinned no need to reserve */
182 if (list_is_singular(&release->bos))
183 return;
184
185 ttm_eu_backoff_reservation(&release->ticket, &release->bos);
186}
187
188
189int qxl_alloc_surface_release_reserved(struct qxl_device *qdev,
190 enum qxl_surface_cmd_type surface_cmd_type,
191 struct qxl_release *create_rel,
192 struct qxl_release **release)
193{
194 if (surface_cmd_type == QXL_SURFACE_CMD_DESTROY && create_rel) {
195 int idr_ret;
196 struct qxl_bo_list *entry = list_first_entry(&create_rel->bos, struct qxl_bo_list, tv.head);
197 struct qxl_bo *bo;
198 union qxl_release_info *info;
199
200 /* stash the release after the create command */
201 idr_ret = qxl_release_alloc(qdev, QXL_RELEASE_SURFACE_CMD, release);
202 bo = qxl_bo_ref(to_qxl_bo(entry->tv.bo));
203
204 (*release)->release_offset = create_rel->release_offset + 64;
205
206 qxl_release_list_add(*release, bo);
207
208 info = qxl_release_map(qdev, *release);
209 info->id = idr_ret;
210 qxl_release_unmap(qdev, *release, info);
211
212 qxl_bo_unref(&bo);
213 return 0;
214 }
215
216 return qxl_alloc_release_reserved(qdev, sizeof(struct qxl_surface_cmd),
217 QXL_RELEASE_SURFACE_CMD, release, NULL);
218}
219
220int qxl_alloc_release_reserved(struct qxl_device *qdev, unsigned long size,
221 int type, struct qxl_release **release,
222 struct qxl_bo **rbo)
223{
224 struct qxl_bo *bo;
225 int idr_ret;
226 int ret = 0;
227 union qxl_release_info *info;
228 int cur_idx;
229
230 if (type == QXL_RELEASE_DRAWABLE)
231 cur_idx = 0;
232 else if (type == QXL_RELEASE_SURFACE_CMD)
233 cur_idx = 1;
234 else if (type == QXL_RELEASE_CURSOR_CMD)
235 cur_idx = 2;
236 else {
237 DRM_ERROR("got illegal type: %d\n", type);
238 return -EINVAL;
239 }
240
241 idr_ret = qxl_release_alloc(qdev, type, release);
242
243 mutex_lock(&qdev->release_mutex);
244 if (qdev->current_release_bo_offset[cur_idx] + 1 >= releases_per_bo[cur_idx]) {
245 qxl_bo_unref(&qdev->current_release_bo[cur_idx]);
246 qdev->current_release_bo_offset[cur_idx] = 0;
247 qdev->current_release_bo[cur_idx] = NULL;
248 }
249 if (!qdev->current_release_bo[cur_idx]) {
250 ret = qxl_release_bo_alloc(qdev, &qdev->current_release_bo[cur_idx]);
251 if (ret) {
252 mutex_unlock(&qdev->release_mutex);
253 return ret;
254 }
255 }
256
257 bo = qxl_bo_ref(qdev->current_release_bo[cur_idx]);
258
259 (*release)->release_offset = qdev->current_release_bo_offset[cur_idx] * release_size_per_bo[cur_idx];
260 qdev->current_release_bo_offset[cur_idx]++;
261
262 if (rbo)
263 *rbo = bo;
264
265 mutex_unlock(&qdev->release_mutex);
266
267 qxl_release_list_add(*release, bo);
268
269 info = qxl_release_map(qdev, *release);
270 info->id = idr_ret;
271 qxl_release_unmap(qdev, *release, info);
272
273 qxl_bo_unref(&bo);
274 return ret;
275}
276
277struct qxl_release *qxl_release_from_id_locked(struct qxl_device *qdev,
278 uint64_t id)
279{
280 struct qxl_release *release;
281
282 spin_lock(&qdev->release_idr_lock);
283 release = idr_find(&qdev->release_idr, id);
284 spin_unlock(&qdev->release_idr_lock);
285 if (!release) {
286 DRM_ERROR("failed to find id in release_idr\n");
287 return NULL;
288 }
289
290 return release;
291}
292
293union qxl_release_info *qxl_release_map(struct qxl_device *qdev,
294 struct qxl_release *release)
295{
296 void *ptr;
297 union qxl_release_info *info;
298 struct qxl_bo_list *entry = list_first_entry(&release->bos, struct qxl_bo_list, tv.head);
299 struct qxl_bo *bo = to_qxl_bo(entry->tv.bo);
300
301 ptr = qxl_bo_kmap_atomic_page(qdev, bo, release->release_offset & PAGE_SIZE);
302 if (!ptr)
303 return NULL;
304 info = ptr + (release->release_offset & ~PAGE_SIZE);
305 return info;
306}
307
308void qxl_release_unmap(struct qxl_device *qdev,
309 struct qxl_release *release,
310 union qxl_release_info *info)
311{
312 struct qxl_bo_list *entry = list_first_entry(&release->bos, struct qxl_bo_list, tv.head);
313 struct qxl_bo *bo = to_qxl_bo(entry->tv.bo);
314 void *ptr;
315
316 ptr = ((void *)info) - (release->release_offset & ~PAGE_SIZE);
317 qxl_bo_kunmap_atomic_page(qdev, bo, ptr);
318}
319
320void qxl_release_fence_buffer_objects(struct qxl_release *release)
321{
322 struct ttm_validate_buffer *entry;
323 struct ttm_buffer_object *bo;
324 struct ttm_bo_global *glob;
325 struct ttm_bo_device *bdev;
326 struct ttm_bo_driver *driver;
327 struct qxl_bo *qbo;
328
329 /* if only one object on the release its the release itself
330 since these objects are pinned no need to reserve */
331 if (list_is_singular(&release->bos))
332 return;
333
334 bo = list_first_entry(&release->bos, struct ttm_validate_buffer, head)->bo;
335 bdev = bo->bdev;
336 driver = bdev->driver;
337 glob = bo->glob;
338
339 spin_lock(&glob->lru_lock);
340 spin_lock(&bdev->fence_lock);
341
342 list_for_each_entry(entry, &release->bos, head) {
343 bo = entry->bo;
344 qbo = to_qxl_bo(bo);
345
346 if (!entry->bo->sync_obj)
347 entry->bo->sync_obj = &qbo->fence;
348
349 qxl_fence_add_release_locked(&qbo->fence, release->id);
350
351 ttm_bo_add_to_lru(bo);
352 __ttm_bo_unreserve(bo);
353 entry->reserved = false;
354 }
355 spin_unlock(&bdev->fence_lock);
356 spin_unlock(&glob->lru_lock);
357 ww_acquire_fini(&release->ticket);
358}
359