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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#include <linux/dma-buf-map.h>
27#include <linux/io-mapping.h>
28
29#include "qxl_drv.h"
30#include "qxl_object.h"
31
32static int __qxl_bo_pin(struct qxl_bo *bo);
33static void __qxl_bo_unpin(struct qxl_bo *bo);
34
35static void qxl_ttm_bo_destroy(struct ttm_buffer_object *tbo)
36{
37 struct qxl_bo *bo;
38 struct qxl_device *qdev;
39
40 bo = to_qxl_bo(tbo);
41 qdev = to_qxl(bo->tbo.base.dev);
42
43 qxl_surface_evict(qdev, bo, false);
44 WARN_ON_ONCE(bo->map_count > 0);
45 mutex_lock(&qdev->gem.mutex);
46 list_del_init(&bo->list);
47 mutex_unlock(&qdev->gem.mutex);
48 drm_gem_object_release(&bo->tbo.base);
49 kfree(bo);
50}
51
52bool qxl_ttm_bo_is_qxl_bo(struct ttm_buffer_object *bo)
53{
54 if (bo->destroy == &qxl_ttm_bo_destroy)
55 return true;
56 return false;
57}
58
59void qxl_ttm_placement_from_domain(struct qxl_bo *qbo, u32 domain)
60{
61 u32 c = 0;
62 u32 pflag = 0;
63 unsigned int i;
64
65 if (qbo->tbo.base.size <= PAGE_SIZE)
66 pflag |= TTM_PL_FLAG_TOPDOWN;
67
68 qbo->placement.placement = qbo->placements;
69 qbo->placement.busy_placement = qbo->placements;
70 if (domain == QXL_GEM_DOMAIN_VRAM) {
71 qbo->placements[c].mem_type = TTM_PL_VRAM;
72 qbo->placements[c++].flags = pflag;
73 }
74 if (domain == QXL_GEM_DOMAIN_SURFACE) {
75 qbo->placements[c].mem_type = TTM_PL_PRIV;
76 qbo->placements[c++].flags = pflag;
77 qbo->placements[c].mem_type = TTM_PL_VRAM;
78 qbo->placements[c++].flags = pflag;
79 }
80 if (domain == QXL_GEM_DOMAIN_CPU) {
81 qbo->placements[c].mem_type = TTM_PL_SYSTEM;
82 qbo->placements[c++].flags = pflag;
83 }
84 if (!c) {
85 qbo->placements[c].mem_type = TTM_PL_SYSTEM;
86 qbo->placements[c++].flags = 0;
87 }
88 qbo->placement.num_placement = c;
89 qbo->placement.num_busy_placement = c;
90 for (i = 0; i < c; ++i) {
91 qbo->placements[i].fpfn = 0;
92 qbo->placements[i].lpfn = 0;
93 }
94}
95
96static const struct drm_gem_object_funcs qxl_object_funcs = {
97 .free = qxl_gem_object_free,
98 .open = qxl_gem_object_open,
99 .close = qxl_gem_object_close,
100 .pin = qxl_gem_prime_pin,
101 .unpin = qxl_gem_prime_unpin,
102 .get_sg_table = qxl_gem_prime_get_sg_table,
103 .vmap = qxl_gem_prime_vmap,
104 .vunmap = qxl_gem_prime_vunmap,
105 .mmap = drm_gem_ttm_mmap,
106 .print_info = drm_gem_ttm_print_info,
107};
108
109int qxl_bo_create(struct qxl_device *qdev, unsigned long size,
110 bool kernel, bool pinned, u32 domain, u32 priority,
111 struct qxl_surface *surf,
112 struct qxl_bo **bo_ptr)
113{
114 struct ttm_operation_ctx ctx = { !kernel, false };
115 struct qxl_bo *bo;
116 enum ttm_bo_type type;
117 int r;
118
119 if (kernel)
120 type = ttm_bo_type_kernel;
121 else
122 type = ttm_bo_type_device;
123 *bo_ptr = NULL;
124 bo = kzalloc(sizeof(struct qxl_bo), GFP_KERNEL);
125 if (bo == NULL)
126 return -ENOMEM;
127 size = roundup(size, PAGE_SIZE);
128 r = drm_gem_object_init(&qdev->ddev, &bo->tbo.base, size);
129 if (unlikely(r)) {
130 kfree(bo);
131 return r;
132 }
133 bo->tbo.base.funcs = &qxl_object_funcs;
134 bo->type = domain;
135 bo->surface_id = 0;
136 INIT_LIST_HEAD(&bo->list);
137
138 if (surf)
139 bo->surf = *surf;
140
141 qxl_ttm_placement_from_domain(bo, domain);
142
143 bo->tbo.priority = priority;
144 r = ttm_bo_init_reserved(&qdev->mman.bdev, &bo->tbo, size, type,
145 &bo->placement, 0, &ctx, NULL, NULL,
146 &qxl_ttm_bo_destroy);
147 if (unlikely(r != 0)) {
148 if (r != -ERESTARTSYS)
149 dev_err(qdev->ddev.dev,
150 "object_init failed for (%lu, 0x%08X)\n",
151 size, domain);
152 return r;
153 }
154 if (pinned)
155 ttm_bo_pin(&bo->tbo);
156 ttm_bo_unreserve(&bo->tbo);
157 *bo_ptr = bo;
158 return 0;
159}
160
161int qxl_bo_vmap_locked(struct qxl_bo *bo, struct dma_buf_map *map)
162{
163 int r;
164
165 dma_resv_assert_held(bo->tbo.base.resv);
166
167 if (bo->kptr) {
168 bo->map_count++;
169 goto out;
170 }
171 r = ttm_bo_vmap(&bo->tbo, &bo->map);
172 if (r)
173 return r;
174 bo->map_count = 1;
175
176 /* TODO: Remove kptr in favor of map everywhere. */
177 if (bo->map.is_iomem)
178 bo->kptr = (void *)bo->map.vaddr_iomem;
179 else
180 bo->kptr = bo->map.vaddr;
181
182out:
183 *map = bo->map;
184 return 0;
185}
186
187int qxl_bo_vmap(struct qxl_bo *bo, struct dma_buf_map *map)
188{
189 int r;
190
191 r = qxl_bo_reserve(bo);
192 if (r)
193 return r;
194
195 r = __qxl_bo_pin(bo);
196 if (r) {
197 qxl_bo_unreserve(bo);
198 return r;
199 }
200
201 r = qxl_bo_vmap_locked(bo, map);
202 qxl_bo_unreserve(bo);
203 return r;
204}
205
206void *qxl_bo_kmap_atomic_page(struct qxl_device *qdev,
207 struct qxl_bo *bo, int page_offset)
208{
209 unsigned long offset;
210 void *rptr;
211 int ret;
212 struct io_mapping *map;
213 struct dma_buf_map bo_map;
214
215 if (bo->tbo.resource->mem_type == TTM_PL_VRAM)
216 map = qdev->vram_mapping;
217 else if (bo->tbo.resource->mem_type == TTM_PL_PRIV)
218 map = qdev->surface_mapping;
219 else
220 goto fallback;
221
222 offset = bo->tbo.resource->start << PAGE_SHIFT;
223 return io_mapping_map_atomic_wc(map, offset + page_offset);
224fallback:
225 if (bo->kptr) {
226 rptr = bo->kptr + (page_offset * PAGE_SIZE);
227 return rptr;
228 }
229
230 ret = qxl_bo_vmap_locked(bo, &bo_map);
231 if (ret)
232 return NULL;
233 rptr = bo_map.vaddr; /* TODO: Use mapping abstraction properly */
234
235 rptr += page_offset * PAGE_SIZE;
236 return rptr;
237}
238
239void qxl_bo_vunmap_locked(struct qxl_bo *bo)
240{
241 dma_resv_assert_held(bo->tbo.base.resv);
242
243 if (bo->kptr == NULL)
244 return;
245 bo->map_count--;
246 if (bo->map_count > 0)
247 return;
248 bo->kptr = NULL;
249 ttm_bo_vunmap(&bo->tbo, &bo->map);
250}
251
252int qxl_bo_vunmap(struct qxl_bo *bo)
253{
254 int r;
255
256 r = qxl_bo_reserve(bo);
257 if (r)
258 return r;
259
260 qxl_bo_vunmap_locked(bo);
261 __qxl_bo_unpin(bo);
262 qxl_bo_unreserve(bo);
263 return 0;
264}
265
266void qxl_bo_kunmap_atomic_page(struct qxl_device *qdev,
267 struct qxl_bo *bo, void *pmap)
268{
269 if ((bo->tbo.resource->mem_type != TTM_PL_VRAM) &&
270 (bo->tbo.resource->mem_type != TTM_PL_PRIV))
271 goto fallback;
272
273 io_mapping_unmap_atomic(pmap);
274 return;
275 fallback:
276 qxl_bo_vunmap_locked(bo);
277}
278
279void qxl_bo_unref(struct qxl_bo **bo)
280{
281 if ((*bo) == NULL)
282 return;
283
284 drm_gem_object_put(&(*bo)->tbo.base);
285 *bo = NULL;
286}
287
288struct qxl_bo *qxl_bo_ref(struct qxl_bo *bo)
289{
290 drm_gem_object_get(&bo->tbo.base);
291 return bo;
292}
293
294static int __qxl_bo_pin(struct qxl_bo *bo)
295{
296 struct ttm_operation_ctx ctx = { false, false };
297 struct drm_device *ddev = bo->tbo.base.dev;
298 int r;
299
300 if (bo->tbo.pin_count) {
301 ttm_bo_pin(&bo->tbo);
302 return 0;
303 }
304 qxl_ttm_placement_from_domain(bo, bo->type);
305 r = ttm_bo_validate(&bo->tbo, &bo->placement, &ctx);
306 if (likely(r == 0))
307 ttm_bo_pin(&bo->tbo);
308 if (unlikely(r != 0))
309 dev_err(ddev->dev, "%p pin failed\n", bo);
310 return r;
311}
312
313static void __qxl_bo_unpin(struct qxl_bo *bo)
314{
315 ttm_bo_unpin(&bo->tbo);
316}
317
318/*
319 * Reserve the BO before pinning the object. If the BO was reserved
320 * beforehand, use the internal version directly __qxl_bo_pin.
321 *
322 */
323int qxl_bo_pin(struct qxl_bo *bo)
324{
325 int r;
326
327 r = qxl_bo_reserve(bo);
328 if (r)
329 return r;
330
331 r = __qxl_bo_pin(bo);
332 qxl_bo_unreserve(bo);
333 return r;
334}
335
336/*
337 * Reserve the BO before pinning the object. If the BO was reserved
338 * beforehand, use the internal version directly __qxl_bo_unpin.
339 *
340 */
341int qxl_bo_unpin(struct qxl_bo *bo)
342{
343 int r;
344
345 r = qxl_bo_reserve(bo);
346 if (r)
347 return r;
348
349 __qxl_bo_unpin(bo);
350 qxl_bo_unreserve(bo);
351 return 0;
352}
353
354void qxl_bo_force_delete(struct qxl_device *qdev)
355{
356 struct qxl_bo *bo, *n;
357
358 if (list_empty(&qdev->gem.objects))
359 return;
360 dev_err(qdev->ddev.dev, "Userspace still has active objects !\n");
361 list_for_each_entry_safe(bo, n, &qdev->gem.objects, list) {
362 dev_err(qdev->ddev.dev, "%p %p %lu %lu force free\n",
363 &bo->tbo.base, bo, (unsigned long)bo->tbo.base.size,
364 *((unsigned long *)&bo->tbo.base.refcount));
365 mutex_lock(&qdev->gem.mutex);
366 list_del_init(&bo->list);
367 mutex_unlock(&qdev->gem.mutex);
368 /* this should unref the ttm bo */
369 drm_gem_object_put(&bo->tbo.base);
370 }
371}
372
373int qxl_bo_init(struct qxl_device *qdev)
374{
375 return qxl_ttm_init(qdev);
376}
377
378void qxl_bo_fini(struct qxl_device *qdev)
379{
380 qxl_ttm_fini(qdev);
381}
382
383int qxl_bo_check_id(struct qxl_device *qdev, struct qxl_bo *bo)
384{
385 int ret;
386
387 if (bo->type == QXL_GEM_DOMAIN_SURFACE && bo->surface_id == 0) {
388 /* allocate a surface id for this surface now */
389 ret = qxl_surface_id_alloc(qdev, bo);
390 if (ret)
391 return ret;
392
393 ret = qxl_hw_surface_alloc(qdev, bo);
394 if (ret)
395 return ret;
396 }
397 return 0;
398}
399
400int qxl_surf_evict(struct qxl_device *qdev)
401{
402 struct ttm_resource_manager *man;
403
404 man = ttm_manager_type(&qdev->mman.bdev, TTM_PL_PRIV);
405 return ttm_resource_manager_evict_all(&qdev->mman.bdev, man);
406}
407
408int qxl_vram_evict(struct qxl_device *qdev)
409{
410 struct ttm_resource_manager *man;
411
412 man = ttm_manager_type(&qdev->mman.bdev, TTM_PL_VRAM);
413 return ttm_resource_manager_evict_all(&qdev->mman.bdev, man);
414}