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1/*
2 * Copyright 2009 Jerome Glisse.
3 * All Rights Reserved.
4 *
5 * Permission is hereby granted, free of charge, to any person obtaining a
6 * copy of this software and associated documentation files (the
7 * "Software"), to deal in the Software without restriction, including
8 * without limitation the rights to use, copy, modify, merge, publish,
9 * distribute, sub license, and/or sell copies of the Software, and to
10 * permit persons to whom the Software is furnished to do so, subject to
11 * the following conditions:
12 *
13 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
14 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
15 * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL
16 * THE COPYRIGHT HOLDERS, AUTHORS AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM,
17 * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
18 * OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
19 * USE OR OTHER DEALINGS IN THE SOFTWARE.
20 *
21 * The above copyright notice and this permission notice (including the
22 * next paragraph) shall be included in all copies or substantial portions
23 * of the Software.
24 *
25 */
26/*
27 * Authors:
28 * Jerome Glisse <glisse@freedesktop.org>
29 * Thomas Hellstrom <thomas-at-tungstengraphics-dot-com>
30 * Dave Airlie
31 */
32#include <linux/list.h>
33#include <linux/slab.h>
34#include <drm/drmP.h>
35#include "radeon_drm.h"
36#include "radeon.h"
37#include "radeon_trace.h"
38
39
40int radeon_ttm_init(struct radeon_device *rdev);
41void radeon_ttm_fini(struct radeon_device *rdev);
42static void radeon_bo_clear_surface_reg(struct radeon_bo *bo);
43
44/*
45 * To exclude mutual BO access we rely on bo_reserve exclusion, as all
46 * function are calling it.
47 */
48
49static void radeon_ttm_bo_destroy(struct ttm_buffer_object *tbo)
50{
51 struct radeon_bo *bo;
52
53 bo = container_of(tbo, struct radeon_bo, tbo);
54 mutex_lock(&bo->rdev->gem.mutex);
55 list_del_init(&bo->list);
56 mutex_unlock(&bo->rdev->gem.mutex);
57 radeon_bo_clear_surface_reg(bo);
58 drm_gem_object_release(&bo->gem_base);
59 kfree(bo);
60}
61
62bool radeon_ttm_bo_is_radeon_bo(struct ttm_buffer_object *bo)
63{
64 if (bo->destroy == &radeon_ttm_bo_destroy)
65 return true;
66 return false;
67}
68
69void radeon_ttm_placement_from_domain(struct radeon_bo *rbo, u32 domain)
70{
71 u32 c = 0;
72
73 rbo->placement.fpfn = 0;
74 rbo->placement.lpfn = 0;
75 rbo->placement.placement = rbo->placements;
76 rbo->placement.busy_placement = rbo->placements;
77 if (domain & RADEON_GEM_DOMAIN_VRAM)
78 rbo->placements[c++] = TTM_PL_FLAG_WC | TTM_PL_FLAG_UNCACHED |
79 TTM_PL_FLAG_VRAM;
80 if (domain & RADEON_GEM_DOMAIN_GTT)
81 rbo->placements[c++] = TTM_PL_MASK_CACHING | TTM_PL_FLAG_TT;
82 if (domain & RADEON_GEM_DOMAIN_CPU)
83 rbo->placements[c++] = TTM_PL_MASK_CACHING | TTM_PL_FLAG_SYSTEM;
84 if (!c)
85 rbo->placements[c++] = TTM_PL_MASK_CACHING | TTM_PL_FLAG_SYSTEM;
86 rbo->placement.num_placement = c;
87 rbo->placement.num_busy_placement = c;
88}
89
90int radeon_bo_create(struct radeon_device *rdev,
91 unsigned long size, int byte_align, bool kernel, u32 domain,
92 struct radeon_bo **bo_ptr)
93{
94 struct radeon_bo *bo;
95 enum ttm_bo_type type;
96 unsigned long page_align = roundup(byte_align, PAGE_SIZE) >> PAGE_SHIFT;
97 unsigned long max_size = 0;
98 int r;
99
100 size = ALIGN(size, PAGE_SIZE);
101
102 if (unlikely(rdev->mman.bdev.dev_mapping == NULL)) {
103 rdev->mman.bdev.dev_mapping = rdev->ddev->dev_mapping;
104 }
105 if (kernel) {
106 type = ttm_bo_type_kernel;
107 } else {
108 type = ttm_bo_type_device;
109 }
110 *bo_ptr = NULL;
111
112 /* maximun bo size is the minimun btw visible vram and gtt size */
113 max_size = min(rdev->mc.visible_vram_size, rdev->mc.gtt_size);
114 if ((page_align << PAGE_SHIFT) >= max_size) {
115 printk(KERN_WARNING "%s:%d alloc size %ldM bigger than %ldMb limit\n",
116 __func__, __LINE__, page_align >> (20 - PAGE_SHIFT), max_size >> 20);
117 return -ENOMEM;
118 }
119
120retry:
121 bo = kzalloc(sizeof(struct radeon_bo), GFP_KERNEL);
122 if (bo == NULL)
123 return -ENOMEM;
124 r = drm_gem_object_init(rdev->ddev, &bo->gem_base, size);
125 if (unlikely(r)) {
126 kfree(bo);
127 return r;
128 }
129 bo->rdev = rdev;
130 bo->gem_base.driver_private = NULL;
131 bo->surface_reg = -1;
132 INIT_LIST_HEAD(&bo->list);
133 radeon_ttm_placement_from_domain(bo, domain);
134 /* Kernel allocation are uninterruptible */
135 mutex_lock(&rdev->vram_mutex);
136 r = ttm_bo_init(&rdev->mman.bdev, &bo->tbo, size, type,
137 &bo->placement, page_align, 0, !kernel, NULL, size,
138 &radeon_ttm_bo_destroy);
139 mutex_unlock(&rdev->vram_mutex);
140 if (unlikely(r != 0)) {
141 if (r != -ERESTARTSYS) {
142 if (domain == RADEON_GEM_DOMAIN_VRAM) {
143 domain |= RADEON_GEM_DOMAIN_GTT;
144 goto retry;
145 }
146 dev_err(rdev->dev,
147 "object_init failed for (%lu, 0x%08X)\n",
148 size, domain);
149 }
150 return r;
151 }
152 *bo_ptr = bo;
153
154 trace_radeon_bo_create(bo);
155
156 return 0;
157}
158
159int radeon_bo_kmap(struct radeon_bo *bo, void **ptr)
160{
161 bool is_iomem;
162 int r;
163
164 if (bo->kptr) {
165 if (ptr) {
166 *ptr = bo->kptr;
167 }
168 return 0;
169 }
170 r = ttm_bo_kmap(&bo->tbo, 0, bo->tbo.num_pages, &bo->kmap);
171 if (r) {
172 return r;
173 }
174 bo->kptr = ttm_kmap_obj_virtual(&bo->kmap, &is_iomem);
175 if (ptr) {
176 *ptr = bo->kptr;
177 }
178 radeon_bo_check_tiling(bo, 0, 0);
179 return 0;
180}
181
182void radeon_bo_kunmap(struct radeon_bo *bo)
183{
184 if (bo->kptr == NULL)
185 return;
186 bo->kptr = NULL;
187 radeon_bo_check_tiling(bo, 0, 0);
188 ttm_bo_kunmap(&bo->kmap);
189}
190
191void radeon_bo_unref(struct radeon_bo **bo)
192{
193 struct ttm_buffer_object *tbo;
194 struct radeon_device *rdev;
195
196 if ((*bo) == NULL)
197 return;
198 rdev = (*bo)->rdev;
199 tbo = &((*bo)->tbo);
200 mutex_lock(&rdev->vram_mutex);
201 ttm_bo_unref(&tbo);
202 mutex_unlock(&rdev->vram_mutex);
203 if (tbo == NULL)
204 *bo = NULL;
205}
206
207int radeon_bo_pin(struct radeon_bo *bo, u32 domain, u64 *gpu_addr)
208{
209 int r, i;
210
211 if (bo->pin_count) {
212 bo->pin_count++;
213 if (gpu_addr)
214 *gpu_addr = radeon_bo_gpu_offset(bo);
215 return 0;
216 }
217 radeon_ttm_placement_from_domain(bo, domain);
218 if (domain == RADEON_GEM_DOMAIN_VRAM) {
219 /* force to pin into visible video ram */
220 bo->placement.lpfn = bo->rdev->mc.visible_vram_size >> PAGE_SHIFT;
221 }
222 for (i = 0; i < bo->placement.num_placement; i++)
223 bo->placements[i] |= TTM_PL_FLAG_NO_EVICT;
224 r = ttm_bo_validate(&bo->tbo, &bo->placement, false, false, false);
225 if (likely(r == 0)) {
226 bo->pin_count = 1;
227 if (gpu_addr != NULL)
228 *gpu_addr = radeon_bo_gpu_offset(bo);
229 }
230 if (unlikely(r != 0))
231 dev_err(bo->rdev->dev, "%p pin failed\n", bo);
232 return r;
233}
234
235int radeon_bo_unpin(struct radeon_bo *bo)
236{
237 int r, i;
238
239 if (!bo->pin_count) {
240 dev_warn(bo->rdev->dev, "%p unpin not necessary\n", bo);
241 return 0;
242 }
243 bo->pin_count--;
244 if (bo->pin_count)
245 return 0;
246 for (i = 0; i < bo->placement.num_placement; i++)
247 bo->placements[i] &= ~TTM_PL_FLAG_NO_EVICT;
248 r = ttm_bo_validate(&bo->tbo, &bo->placement, false, false, false);
249 if (unlikely(r != 0))
250 dev_err(bo->rdev->dev, "%p validate failed for unpin\n", bo);
251 return r;
252}
253
254int radeon_bo_evict_vram(struct radeon_device *rdev)
255{
256 /* late 2.6.33 fix IGP hibernate - we need pm ops to do this correct */
257 if (0 && (rdev->flags & RADEON_IS_IGP)) {
258 if (rdev->mc.igp_sideport_enabled == false)
259 /* Useless to evict on IGP chips */
260 return 0;
261 }
262 return ttm_bo_evict_mm(&rdev->mman.bdev, TTM_PL_VRAM);
263}
264
265void radeon_bo_force_delete(struct radeon_device *rdev)
266{
267 struct radeon_bo *bo, *n;
268
269 if (list_empty(&rdev->gem.objects)) {
270 return;
271 }
272 dev_err(rdev->dev, "Userspace still has active objects !\n");
273 list_for_each_entry_safe(bo, n, &rdev->gem.objects, list) {
274 mutex_lock(&rdev->ddev->struct_mutex);
275 dev_err(rdev->dev, "%p %p %lu %lu force free\n",
276 &bo->gem_base, bo, (unsigned long)bo->gem_base.size,
277 *((unsigned long *)&bo->gem_base.refcount));
278 mutex_lock(&bo->rdev->gem.mutex);
279 list_del_init(&bo->list);
280 mutex_unlock(&bo->rdev->gem.mutex);
281 /* this should unref the ttm bo */
282 drm_gem_object_unreference(&bo->gem_base);
283 mutex_unlock(&rdev->ddev->struct_mutex);
284 }
285}
286
287int radeon_bo_init(struct radeon_device *rdev)
288{
289 /* Add an MTRR for the VRAM */
290 rdev->mc.vram_mtrr = mtrr_add(rdev->mc.aper_base, rdev->mc.aper_size,
291 MTRR_TYPE_WRCOMB, 1);
292 DRM_INFO("Detected VRAM RAM=%lluM, BAR=%lluM\n",
293 rdev->mc.mc_vram_size >> 20,
294 (unsigned long long)rdev->mc.aper_size >> 20);
295 DRM_INFO("RAM width %dbits %cDR\n",
296 rdev->mc.vram_width, rdev->mc.vram_is_ddr ? 'D' : 'S');
297 return radeon_ttm_init(rdev);
298}
299
300void radeon_bo_fini(struct radeon_device *rdev)
301{
302 radeon_ttm_fini(rdev);
303}
304
305void radeon_bo_list_add_object(struct radeon_bo_list *lobj,
306 struct list_head *head)
307{
308 if (lobj->wdomain) {
309 list_add(&lobj->tv.head, head);
310 } else {
311 list_add_tail(&lobj->tv.head, head);
312 }
313}
314
315int radeon_bo_list_validate(struct list_head *head)
316{
317 struct radeon_bo_list *lobj;
318 struct radeon_bo *bo;
319 u32 domain;
320 int r;
321
322 r = ttm_eu_reserve_buffers(head);
323 if (unlikely(r != 0)) {
324 return r;
325 }
326 list_for_each_entry(lobj, head, tv.head) {
327 bo = lobj->bo;
328 if (!bo->pin_count) {
329 domain = lobj->wdomain ? lobj->wdomain : lobj->rdomain;
330
331 retry:
332 radeon_ttm_placement_from_domain(bo, domain);
333 r = ttm_bo_validate(&bo->tbo, &bo->placement,
334 true, false, false);
335 if (unlikely(r)) {
336 if (r != -ERESTARTSYS && domain == RADEON_GEM_DOMAIN_VRAM) {
337 domain |= RADEON_GEM_DOMAIN_GTT;
338 goto retry;
339 }
340 return r;
341 }
342 }
343 lobj->gpu_offset = radeon_bo_gpu_offset(bo);
344 lobj->tiling_flags = bo->tiling_flags;
345 }
346 return 0;
347}
348
349int radeon_bo_fbdev_mmap(struct radeon_bo *bo,
350 struct vm_area_struct *vma)
351{
352 return ttm_fbdev_mmap(vma, &bo->tbo);
353}
354
355int radeon_bo_get_surface_reg(struct radeon_bo *bo)
356{
357 struct radeon_device *rdev = bo->rdev;
358 struct radeon_surface_reg *reg;
359 struct radeon_bo *old_object;
360 int steal;
361 int i;
362
363 BUG_ON(!atomic_read(&bo->tbo.reserved));
364
365 if (!bo->tiling_flags)
366 return 0;
367
368 if (bo->surface_reg >= 0) {
369 reg = &rdev->surface_regs[bo->surface_reg];
370 i = bo->surface_reg;
371 goto out;
372 }
373
374 steal = -1;
375 for (i = 0; i < RADEON_GEM_MAX_SURFACES; i++) {
376
377 reg = &rdev->surface_regs[i];
378 if (!reg->bo)
379 break;
380
381 old_object = reg->bo;
382 if (old_object->pin_count == 0)
383 steal = i;
384 }
385
386 /* if we are all out */
387 if (i == RADEON_GEM_MAX_SURFACES) {
388 if (steal == -1)
389 return -ENOMEM;
390 /* find someone with a surface reg and nuke their BO */
391 reg = &rdev->surface_regs[steal];
392 old_object = reg->bo;
393 /* blow away the mapping */
394 DRM_DEBUG("stealing surface reg %d from %p\n", steal, old_object);
395 ttm_bo_unmap_virtual(&old_object->tbo);
396 old_object->surface_reg = -1;
397 i = steal;
398 }
399
400 bo->surface_reg = i;
401 reg->bo = bo;
402
403out:
404 radeon_set_surface_reg(rdev, i, bo->tiling_flags, bo->pitch,
405 bo->tbo.mem.start << PAGE_SHIFT,
406 bo->tbo.num_pages << PAGE_SHIFT);
407 return 0;
408}
409
410static void radeon_bo_clear_surface_reg(struct radeon_bo *bo)
411{
412 struct radeon_device *rdev = bo->rdev;
413 struct radeon_surface_reg *reg;
414
415 if (bo->surface_reg == -1)
416 return;
417
418 reg = &rdev->surface_regs[bo->surface_reg];
419 radeon_clear_surface_reg(rdev, bo->surface_reg);
420
421 reg->bo = NULL;
422 bo->surface_reg = -1;
423}
424
425int radeon_bo_set_tiling_flags(struct radeon_bo *bo,
426 uint32_t tiling_flags, uint32_t pitch)
427{
428 int r;
429
430 r = radeon_bo_reserve(bo, false);
431 if (unlikely(r != 0))
432 return r;
433 bo->tiling_flags = tiling_flags;
434 bo->pitch = pitch;
435 radeon_bo_unreserve(bo);
436 return 0;
437}
438
439void radeon_bo_get_tiling_flags(struct radeon_bo *bo,
440 uint32_t *tiling_flags,
441 uint32_t *pitch)
442{
443 BUG_ON(!atomic_read(&bo->tbo.reserved));
444 if (tiling_flags)
445 *tiling_flags = bo->tiling_flags;
446 if (pitch)
447 *pitch = bo->pitch;
448}
449
450int radeon_bo_check_tiling(struct radeon_bo *bo, bool has_moved,
451 bool force_drop)
452{
453 BUG_ON(!atomic_read(&bo->tbo.reserved));
454
455 if (!(bo->tiling_flags & RADEON_TILING_SURFACE))
456 return 0;
457
458 if (force_drop) {
459 radeon_bo_clear_surface_reg(bo);
460 return 0;
461 }
462
463 if (bo->tbo.mem.mem_type != TTM_PL_VRAM) {
464 if (!has_moved)
465 return 0;
466
467 if (bo->surface_reg >= 0)
468 radeon_bo_clear_surface_reg(bo);
469 return 0;
470 }
471
472 if ((bo->surface_reg >= 0) && !has_moved)
473 return 0;
474
475 return radeon_bo_get_surface_reg(bo);
476}
477
478void radeon_bo_move_notify(struct ttm_buffer_object *bo,
479 struct ttm_mem_reg *mem)
480{
481 struct radeon_bo *rbo;
482 if (!radeon_ttm_bo_is_radeon_bo(bo))
483 return;
484 rbo = container_of(bo, struct radeon_bo, tbo);
485 radeon_bo_check_tiling(rbo, 0, 1);
486}
487
488int radeon_bo_fault_reserve_notify(struct ttm_buffer_object *bo)
489{
490 struct radeon_device *rdev;
491 struct radeon_bo *rbo;
492 unsigned long offset, size;
493 int r;
494
495 if (!radeon_ttm_bo_is_radeon_bo(bo))
496 return 0;
497 rbo = container_of(bo, struct radeon_bo, tbo);
498 radeon_bo_check_tiling(rbo, 0, 0);
499 rdev = rbo->rdev;
500 if (bo->mem.mem_type == TTM_PL_VRAM) {
501 size = bo->mem.num_pages << PAGE_SHIFT;
502 offset = bo->mem.start << PAGE_SHIFT;
503 if ((offset + size) > rdev->mc.visible_vram_size) {
504 /* hurrah the memory is not visible ! */
505 radeon_ttm_placement_from_domain(rbo, RADEON_GEM_DOMAIN_VRAM);
506 rbo->placement.lpfn = rdev->mc.visible_vram_size >> PAGE_SHIFT;
507 r = ttm_bo_validate(bo, &rbo->placement, false, true, false);
508 if (unlikely(r != 0))
509 return r;
510 offset = bo->mem.start << PAGE_SHIFT;
511 /* this should not happen */
512 if ((offset + size) > rdev->mc.visible_vram_size)
513 return -EINVAL;
514 }
515 }
516 return 0;
517}
1/*
2 * Copyright 2009 Jerome Glisse.
3 * All Rights Reserved.
4 *
5 * Permission is hereby granted, free of charge, to any person obtaining a
6 * copy of this software and associated documentation files (the
7 * "Software"), to deal in the Software without restriction, including
8 * without limitation the rights to use, copy, modify, merge, publish,
9 * distribute, sub license, and/or sell copies of the Software, and to
10 * permit persons to whom the Software is furnished to do so, subject to
11 * the following conditions:
12 *
13 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
14 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
15 * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL
16 * THE COPYRIGHT HOLDERS, AUTHORS AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM,
17 * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
18 * OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
19 * USE OR OTHER DEALINGS IN THE SOFTWARE.
20 *
21 * The above copyright notice and this permission notice (including the
22 * next paragraph) shall be included in all copies or substantial portions
23 * of the Software.
24 *
25 */
26/*
27 * Authors:
28 * Jerome Glisse <glisse@freedesktop.org>
29 * Thomas Hellstrom <thomas-at-tungstengraphics-dot-com>
30 * Dave Airlie
31 */
32
33#include <linux/io.h>
34#include <linux/list.h>
35#include <linux/slab.h>
36
37#include <drm/drm_cache.h>
38#include <drm/drm_prime.h>
39#include <drm/radeon_drm.h>
40
41#include "radeon.h"
42#include "radeon_trace.h"
43#include "radeon_ttm.h"
44
45static void radeon_bo_clear_surface_reg(struct radeon_bo *bo);
46
47/*
48 * To exclude mutual BO access we rely on bo_reserve exclusion, as all
49 * function are calling it.
50 */
51
52static void radeon_ttm_bo_destroy(struct ttm_buffer_object *tbo)
53{
54 struct radeon_bo *bo;
55
56 bo = container_of(tbo, struct radeon_bo, tbo);
57
58 mutex_lock(&bo->rdev->gem.mutex);
59 list_del_init(&bo->list);
60 mutex_unlock(&bo->rdev->gem.mutex);
61 radeon_bo_clear_surface_reg(bo);
62 WARN_ON_ONCE(!list_empty(&bo->va));
63 if (bo->tbo.base.import_attach)
64 drm_prime_gem_destroy(&bo->tbo.base, bo->tbo.sg);
65 drm_gem_object_release(&bo->tbo.base);
66 kfree(bo);
67}
68
69bool radeon_ttm_bo_is_radeon_bo(struct ttm_buffer_object *bo)
70{
71 if (bo->destroy == &radeon_ttm_bo_destroy)
72 return true;
73 return false;
74}
75
76void radeon_ttm_placement_from_domain(struct radeon_bo *rbo, u32 domain)
77{
78 u32 c = 0, i;
79
80 rbo->placement.placement = rbo->placements;
81 if (domain & RADEON_GEM_DOMAIN_VRAM) {
82 /* Try placing BOs which don't need CPU access outside of the
83 * CPU accessible part of VRAM
84 */
85 if ((rbo->flags & RADEON_GEM_NO_CPU_ACCESS) &&
86 rbo->rdev->mc.visible_vram_size < rbo->rdev->mc.real_vram_size) {
87 rbo->placements[c].fpfn =
88 rbo->rdev->mc.visible_vram_size >> PAGE_SHIFT;
89 rbo->placements[c].mem_type = TTM_PL_VRAM;
90 rbo->placements[c++].flags = 0;
91 }
92
93 rbo->placements[c].fpfn = 0;
94 rbo->placements[c].mem_type = TTM_PL_VRAM;
95 rbo->placements[c++].flags = 0;
96 }
97
98 if (domain & RADEON_GEM_DOMAIN_GTT) {
99 rbo->placements[c].fpfn = 0;
100 rbo->placements[c].mem_type = TTM_PL_TT;
101 rbo->placements[c++].flags = 0;
102 }
103
104 if (domain & RADEON_GEM_DOMAIN_CPU) {
105 rbo->placements[c].fpfn = 0;
106 rbo->placements[c].mem_type = TTM_PL_SYSTEM;
107 rbo->placements[c++].flags = 0;
108 }
109 if (!c) {
110 rbo->placements[c].fpfn = 0;
111 rbo->placements[c].mem_type = TTM_PL_SYSTEM;
112 rbo->placements[c++].flags = 0;
113 }
114
115 rbo->placement.num_placement = c;
116
117 for (i = 0; i < c; ++i) {
118 if ((rbo->flags & RADEON_GEM_CPU_ACCESS) &&
119 (rbo->placements[i].mem_type == TTM_PL_VRAM) &&
120 !rbo->placements[i].fpfn)
121 rbo->placements[i].lpfn =
122 rbo->rdev->mc.visible_vram_size >> PAGE_SHIFT;
123 else
124 rbo->placements[i].lpfn = 0;
125 }
126}
127
128int radeon_bo_create(struct radeon_device *rdev,
129 unsigned long size, int byte_align, bool kernel,
130 u32 domain, u32 flags, struct sg_table *sg,
131 struct dma_resv *resv,
132 struct radeon_bo **bo_ptr)
133{
134 struct radeon_bo *bo;
135 enum ttm_bo_type type;
136 unsigned long page_align = roundup(byte_align, PAGE_SIZE) >> PAGE_SHIFT;
137 int r;
138
139 size = ALIGN(size, PAGE_SIZE);
140
141 if (kernel) {
142 type = ttm_bo_type_kernel;
143 } else if (sg) {
144 type = ttm_bo_type_sg;
145 } else {
146 type = ttm_bo_type_device;
147 }
148 *bo_ptr = NULL;
149
150 bo = kzalloc(sizeof(struct radeon_bo), GFP_KERNEL);
151 if (bo == NULL)
152 return -ENOMEM;
153 drm_gem_private_object_init(rdev->ddev, &bo->tbo.base, size);
154 bo->rdev = rdev;
155 bo->surface_reg = -1;
156 INIT_LIST_HEAD(&bo->list);
157 INIT_LIST_HEAD(&bo->va);
158 bo->initial_domain = domain & (RADEON_GEM_DOMAIN_VRAM |
159 RADEON_GEM_DOMAIN_GTT |
160 RADEON_GEM_DOMAIN_CPU);
161
162 bo->flags = flags;
163 /* PCI GART is always snooped */
164 if (!(rdev->flags & RADEON_IS_PCIE))
165 bo->flags &= ~(RADEON_GEM_GTT_WC | RADEON_GEM_GTT_UC);
166
167 /* Write-combined CPU mappings of GTT cause GPU hangs with RV6xx
168 * See https://bugs.freedesktop.org/show_bug.cgi?id=91268
169 */
170 if (rdev->family >= CHIP_RV610 && rdev->family <= CHIP_RV635)
171 bo->flags &= ~(RADEON_GEM_GTT_WC | RADEON_GEM_GTT_UC);
172
173#ifdef CONFIG_X86_32
174 /* XXX: Write-combined CPU mappings of GTT seem broken on 32-bit
175 * See https://bugs.freedesktop.org/show_bug.cgi?id=84627
176 */
177 bo->flags &= ~(RADEON_GEM_GTT_WC | RADEON_GEM_GTT_UC);
178#elif defined(CONFIG_X86) && !defined(CONFIG_X86_PAT)
179 /* Don't try to enable write-combining when it can't work, or things
180 * may be slow
181 * See https://bugs.freedesktop.org/show_bug.cgi?id=88758
182 */
183#ifndef CONFIG_COMPILE_TEST
184#warning Please enable CONFIG_MTRR and CONFIG_X86_PAT for better performance \
185 thanks to write-combining
186#endif
187
188 if (bo->flags & RADEON_GEM_GTT_WC)
189 DRM_INFO_ONCE("Please enable CONFIG_MTRR and CONFIG_X86_PAT for "
190 "better performance thanks to write-combining\n");
191 bo->flags &= ~(RADEON_GEM_GTT_WC | RADEON_GEM_GTT_UC);
192#else
193 /* For architectures that don't support WC memory,
194 * mask out the WC flag from the BO
195 */
196 if (!drm_arch_can_wc_memory())
197 bo->flags &= ~RADEON_GEM_GTT_WC;
198#endif
199
200 radeon_ttm_placement_from_domain(bo, domain);
201 /* Kernel allocation are uninterruptible */
202 down_read(&rdev->pm.mclk_lock);
203 r = ttm_bo_init_validate(&rdev->mman.bdev, &bo->tbo, type,
204 &bo->placement, page_align, !kernel, sg, resv,
205 &radeon_ttm_bo_destroy);
206 up_read(&rdev->pm.mclk_lock);
207 if (unlikely(r != 0)) {
208 return r;
209 }
210 *bo_ptr = bo;
211
212 trace_radeon_bo_create(bo);
213
214 return 0;
215}
216
217int radeon_bo_kmap(struct radeon_bo *bo, void **ptr)
218{
219 bool is_iomem;
220 long r;
221
222 r = dma_resv_wait_timeout(bo->tbo.base.resv, DMA_RESV_USAGE_KERNEL,
223 false, MAX_SCHEDULE_TIMEOUT);
224 if (r < 0)
225 return r;
226
227 if (bo->kptr) {
228 if (ptr) {
229 *ptr = bo->kptr;
230 }
231 return 0;
232 }
233 r = ttm_bo_kmap(&bo->tbo, 0, PFN_UP(bo->tbo.base.size), &bo->kmap);
234 if (r) {
235 return r;
236 }
237 bo->kptr = ttm_kmap_obj_virtual(&bo->kmap, &is_iomem);
238 if (ptr) {
239 *ptr = bo->kptr;
240 }
241 radeon_bo_check_tiling(bo, 0, 0);
242 return 0;
243}
244
245void radeon_bo_kunmap(struct radeon_bo *bo)
246{
247 if (bo->kptr == NULL)
248 return;
249 bo->kptr = NULL;
250 radeon_bo_check_tiling(bo, 0, 0);
251 ttm_bo_kunmap(&bo->kmap);
252}
253
254struct radeon_bo *radeon_bo_ref(struct radeon_bo *bo)
255{
256 if (bo == NULL)
257 return NULL;
258
259 ttm_bo_get(&bo->tbo);
260 return bo;
261}
262
263void radeon_bo_unref(struct radeon_bo **bo)
264{
265 struct ttm_buffer_object *tbo;
266
267 if ((*bo) == NULL)
268 return;
269 tbo = &((*bo)->tbo);
270 ttm_bo_put(tbo);
271 *bo = NULL;
272}
273
274int radeon_bo_pin_restricted(struct radeon_bo *bo, u32 domain, u64 max_offset,
275 u64 *gpu_addr)
276{
277 struct ttm_operation_ctx ctx = { false, false };
278 int r, i;
279
280 if (radeon_ttm_tt_has_userptr(bo->rdev, bo->tbo.ttm))
281 return -EPERM;
282
283 if (bo->tbo.pin_count) {
284 ttm_bo_pin(&bo->tbo);
285 if (gpu_addr)
286 *gpu_addr = radeon_bo_gpu_offset(bo);
287
288 if (max_offset != 0) {
289 u64 domain_start;
290
291 if (domain == RADEON_GEM_DOMAIN_VRAM)
292 domain_start = bo->rdev->mc.vram_start;
293 else
294 domain_start = bo->rdev->mc.gtt_start;
295 WARN_ON_ONCE(max_offset <
296 (radeon_bo_gpu_offset(bo) - domain_start));
297 }
298
299 return 0;
300 }
301 if (bo->prime_shared_count && domain == RADEON_GEM_DOMAIN_VRAM) {
302 /* A BO shared as a dma-buf cannot be sensibly migrated to VRAM */
303 return -EINVAL;
304 }
305
306 radeon_ttm_placement_from_domain(bo, domain);
307 for (i = 0; i < bo->placement.num_placement; i++) {
308 /* force to pin into visible video ram */
309 if ((bo->placements[i].mem_type == TTM_PL_VRAM) &&
310 !(bo->flags & RADEON_GEM_NO_CPU_ACCESS) &&
311 (!max_offset || max_offset > bo->rdev->mc.visible_vram_size))
312 bo->placements[i].lpfn =
313 bo->rdev->mc.visible_vram_size >> PAGE_SHIFT;
314 else
315 bo->placements[i].lpfn = max_offset >> PAGE_SHIFT;
316 }
317
318 r = ttm_bo_validate(&bo->tbo, &bo->placement, &ctx);
319 if (likely(r == 0)) {
320 ttm_bo_pin(&bo->tbo);
321 if (gpu_addr != NULL)
322 *gpu_addr = radeon_bo_gpu_offset(bo);
323 if (domain == RADEON_GEM_DOMAIN_VRAM)
324 bo->rdev->vram_pin_size += radeon_bo_size(bo);
325 else
326 bo->rdev->gart_pin_size += radeon_bo_size(bo);
327 } else {
328 dev_err(bo->rdev->dev, "%p pin failed\n", bo);
329 }
330 return r;
331}
332
333int radeon_bo_pin(struct radeon_bo *bo, u32 domain, u64 *gpu_addr)
334{
335 return radeon_bo_pin_restricted(bo, domain, 0, gpu_addr);
336}
337
338void radeon_bo_unpin(struct radeon_bo *bo)
339{
340 ttm_bo_unpin(&bo->tbo);
341 if (!bo->tbo.pin_count) {
342 if (bo->tbo.resource->mem_type == TTM_PL_VRAM)
343 bo->rdev->vram_pin_size -= radeon_bo_size(bo);
344 else
345 bo->rdev->gart_pin_size -= radeon_bo_size(bo);
346 }
347}
348
349int radeon_bo_evict_vram(struct radeon_device *rdev)
350{
351 struct ttm_device *bdev = &rdev->mman.bdev;
352 struct ttm_resource_manager *man;
353
354 /* late 2.6.33 fix IGP hibernate - we need pm ops to do this correct */
355#ifndef CONFIG_HIBERNATION
356 if (rdev->flags & RADEON_IS_IGP) {
357 if (rdev->mc.igp_sideport_enabled == false)
358 /* Useless to evict on IGP chips */
359 return 0;
360 }
361#endif
362 man = ttm_manager_type(bdev, TTM_PL_VRAM);
363 if (!man)
364 return 0;
365 return ttm_resource_manager_evict_all(bdev, man);
366}
367
368void radeon_bo_force_delete(struct radeon_device *rdev)
369{
370 struct radeon_bo *bo, *n;
371
372 if (list_empty(&rdev->gem.objects)) {
373 return;
374 }
375 dev_err(rdev->dev, "Userspace still has active objects !\n");
376 list_for_each_entry_safe(bo, n, &rdev->gem.objects, list) {
377 dev_err(rdev->dev, "%p %p %lu %lu force free\n",
378 &bo->tbo.base, bo, (unsigned long)bo->tbo.base.size,
379 *((unsigned long *)&bo->tbo.base.refcount));
380 mutex_lock(&bo->rdev->gem.mutex);
381 list_del_init(&bo->list);
382 mutex_unlock(&bo->rdev->gem.mutex);
383 /* this should unref the ttm bo */
384 drm_gem_object_put(&bo->tbo.base);
385 }
386}
387
388int radeon_bo_init(struct radeon_device *rdev)
389{
390 /* reserve PAT memory space to WC for VRAM */
391 arch_io_reserve_memtype_wc(rdev->mc.aper_base,
392 rdev->mc.aper_size);
393
394 /* Add an MTRR for the VRAM */
395 if (!rdev->fastfb_working) {
396 rdev->mc.vram_mtrr = arch_phys_wc_add(rdev->mc.aper_base,
397 rdev->mc.aper_size);
398 }
399 DRM_INFO("Detected VRAM RAM=%lluM, BAR=%lluM\n",
400 rdev->mc.mc_vram_size >> 20,
401 (unsigned long long)rdev->mc.aper_size >> 20);
402 DRM_INFO("RAM width %dbits %cDR\n",
403 rdev->mc.vram_width, rdev->mc.vram_is_ddr ? 'D' : 'S');
404 return radeon_ttm_init(rdev);
405}
406
407void radeon_bo_fini(struct radeon_device *rdev)
408{
409 radeon_ttm_fini(rdev);
410 arch_phys_wc_del(rdev->mc.vram_mtrr);
411 arch_io_free_memtype_wc(rdev->mc.aper_base, rdev->mc.aper_size);
412}
413
414/* Returns how many bytes TTM can move per IB.
415 */
416static u64 radeon_bo_get_threshold_for_moves(struct radeon_device *rdev)
417{
418 u64 real_vram_size = rdev->mc.real_vram_size;
419 struct ttm_resource_manager *man =
420 ttm_manager_type(&rdev->mman.bdev, TTM_PL_VRAM);
421 u64 vram_usage = ttm_resource_manager_usage(man);
422
423 /* This function is based on the current VRAM usage.
424 *
425 * - If all of VRAM is free, allow relocating the number of bytes that
426 * is equal to 1/4 of the size of VRAM for this IB.
427
428 * - If more than one half of VRAM is occupied, only allow relocating
429 * 1 MB of data for this IB.
430 *
431 * - From 0 to one half of used VRAM, the threshold decreases
432 * linearly.
433 * __________________
434 * 1/4 of -|\ |
435 * VRAM | \ |
436 * | \ |
437 * | \ |
438 * | \ |
439 * | \ |
440 * | \ |
441 * | \________|1 MB
442 * |----------------|
443 * VRAM 0 % 100 %
444 * used used
445 *
446 * Note: It's a threshold, not a limit. The threshold must be crossed
447 * for buffer relocations to stop, so any buffer of an arbitrary size
448 * can be moved as long as the threshold isn't crossed before
449 * the relocation takes place. We don't want to disable buffer
450 * relocations completely.
451 *
452 * The idea is that buffers should be placed in VRAM at creation time
453 * and TTM should only do a minimum number of relocations during
454 * command submission. In practice, you need to submit at least
455 * a dozen IBs to move all buffers to VRAM if they are in GTT.
456 *
457 * Also, things can get pretty crazy under memory pressure and actual
458 * VRAM usage can change a lot, so playing safe even at 50% does
459 * consistently increase performance.
460 */
461
462 u64 half_vram = real_vram_size >> 1;
463 u64 half_free_vram = vram_usage >= half_vram ? 0 : half_vram - vram_usage;
464 u64 bytes_moved_threshold = half_free_vram >> 1;
465 return max(bytes_moved_threshold, 1024*1024ull);
466}
467
468int radeon_bo_list_validate(struct radeon_device *rdev,
469 struct ww_acquire_ctx *ticket,
470 struct list_head *head, int ring)
471{
472 struct ttm_operation_ctx ctx = { true, false };
473 struct radeon_bo_list *lobj;
474 struct list_head duplicates;
475 int r;
476 u64 bytes_moved = 0, initial_bytes_moved;
477 u64 bytes_moved_threshold = radeon_bo_get_threshold_for_moves(rdev);
478
479 INIT_LIST_HEAD(&duplicates);
480 r = ttm_eu_reserve_buffers(ticket, head, true, &duplicates);
481 if (unlikely(r != 0)) {
482 return r;
483 }
484
485 list_for_each_entry(lobj, head, tv.head) {
486 struct radeon_bo *bo = lobj->robj;
487 if (!bo->tbo.pin_count) {
488 u32 domain = lobj->preferred_domains;
489 u32 allowed = lobj->allowed_domains;
490 u32 current_domain =
491 radeon_mem_type_to_domain(bo->tbo.resource->mem_type);
492
493 /* Check if this buffer will be moved and don't move it
494 * if we have moved too many buffers for this IB already.
495 *
496 * Note that this allows moving at least one buffer of
497 * any size, because it doesn't take the current "bo"
498 * into account. We don't want to disallow buffer moves
499 * completely.
500 */
501 if ((allowed & current_domain) != 0 &&
502 (domain & current_domain) == 0 && /* will be moved */
503 bytes_moved > bytes_moved_threshold) {
504 /* don't move it */
505 domain = current_domain;
506 }
507
508 retry:
509 radeon_ttm_placement_from_domain(bo, domain);
510 if (ring == R600_RING_TYPE_UVD_INDEX)
511 radeon_uvd_force_into_uvd_segment(bo, allowed);
512
513 initial_bytes_moved = atomic64_read(&rdev->num_bytes_moved);
514 r = ttm_bo_validate(&bo->tbo, &bo->placement, &ctx);
515 bytes_moved += atomic64_read(&rdev->num_bytes_moved) -
516 initial_bytes_moved;
517
518 if (unlikely(r)) {
519 if (r != -ERESTARTSYS &&
520 domain != lobj->allowed_domains) {
521 domain = lobj->allowed_domains;
522 goto retry;
523 }
524 ttm_eu_backoff_reservation(ticket, head);
525 return r;
526 }
527 }
528 lobj->gpu_offset = radeon_bo_gpu_offset(bo);
529 lobj->tiling_flags = bo->tiling_flags;
530 }
531
532 list_for_each_entry(lobj, &duplicates, tv.head) {
533 lobj->gpu_offset = radeon_bo_gpu_offset(lobj->robj);
534 lobj->tiling_flags = lobj->robj->tiling_flags;
535 }
536
537 return 0;
538}
539
540int radeon_bo_get_surface_reg(struct radeon_bo *bo)
541{
542 struct radeon_device *rdev = bo->rdev;
543 struct radeon_surface_reg *reg;
544 struct radeon_bo *old_object;
545 int steal;
546 int i;
547
548 dma_resv_assert_held(bo->tbo.base.resv);
549
550 if (!bo->tiling_flags)
551 return 0;
552
553 if (bo->surface_reg >= 0) {
554 i = bo->surface_reg;
555 goto out;
556 }
557
558 steal = -1;
559 for (i = 0; i < RADEON_GEM_MAX_SURFACES; i++) {
560
561 reg = &rdev->surface_regs[i];
562 if (!reg->bo)
563 break;
564
565 old_object = reg->bo;
566 if (old_object->tbo.pin_count == 0)
567 steal = i;
568 }
569
570 /* if we are all out */
571 if (i == RADEON_GEM_MAX_SURFACES) {
572 if (steal == -1)
573 return -ENOMEM;
574 /* find someone with a surface reg and nuke their BO */
575 reg = &rdev->surface_regs[steal];
576 old_object = reg->bo;
577 /* blow away the mapping */
578 DRM_DEBUG("stealing surface reg %d from %p\n", steal, old_object);
579 ttm_bo_unmap_virtual(&old_object->tbo);
580 old_object->surface_reg = -1;
581 i = steal;
582 }
583
584 bo->surface_reg = i;
585 reg->bo = bo;
586
587out:
588 radeon_set_surface_reg(rdev, i, bo->tiling_flags, bo->pitch,
589 bo->tbo.resource->start << PAGE_SHIFT,
590 bo->tbo.base.size);
591 return 0;
592}
593
594static void radeon_bo_clear_surface_reg(struct radeon_bo *bo)
595{
596 struct radeon_device *rdev = bo->rdev;
597 struct radeon_surface_reg *reg;
598
599 if (bo->surface_reg == -1)
600 return;
601
602 reg = &rdev->surface_regs[bo->surface_reg];
603 radeon_clear_surface_reg(rdev, bo->surface_reg);
604
605 reg->bo = NULL;
606 bo->surface_reg = -1;
607}
608
609int radeon_bo_set_tiling_flags(struct radeon_bo *bo,
610 uint32_t tiling_flags, uint32_t pitch)
611{
612 struct radeon_device *rdev = bo->rdev;
613 int r;
614
615 if (rdev->family >= CHIP_CEDAR) {
616 unsigned bankw, bankh, mtaspect, tilesplit, stilesplit;
617
618 bankw = (tiling_flags >> RADEON_TILING_EG_BANKW_SHIFT) & RADEON_TILING_EG_BANKW_MASK;
619 bankh = (tiling_flags >> RADEON_TILING_EG_BANKH_SHIFT) & RADEON_TILING_EG_BANKH_MASK;
620 mtaspect = (tiling_flags >> RADEON_TILING_EG_MACRO_TILE_ASPECT_SHIFT) & RADEON_TILING_EG_MACRO_TILE_ASPECT_MASK;
621 tilesplit = (tiling_flags >> RADEON_TILING_EG_TILE_SPLIT_SHIFT) & RADEON_TILING_EG_TILE_SPLIT_MASK;
622 stilesplit = (tiling_flags >> RADEON_TILING_EG_STENCIL_TILE_SPLIT_SHIFT) & RADEON_TILING_EG_STENCIL_TILE_SPLIT_MASK;
623 switch (bankw) {
624 case 0:
625 case 1:
626 case 2:
627 case 4:
628 case 8:
629 break;
630 default:
631 return -EINVAL;
632 }
633 switch (bankh) {
634 case 0:
635 case 1:
636 case 2:
637 case 4:
638 case 8:
639 break;
640 default:
641 return -EINVAL;
642 }
643 switch (mtaspect) {
644 case 0:
645 case 1:
646 case 2:
647 case 4:
648 case 8:
649 break;
650 default:
651 return -EINVAL;
652 }
653 if (tilesplit > 6) {
654 return -EINVAL;
655 }
656 if (stilesplit > 6) {
657 return -EINVAL;
658 }
659 }
660 r = radeon_bo_reserve(bo, false);
661 if (unlikely(r != 0))
662 return r;
663 bo->tiling_flags = tiling_flags;
664 bo->pitch = pitch;
665 radeon_bo_unreserve(bo);
666 return 0;
667}
668
669void radeon_bo_get_tiling_flags(struct radeon_bo *bo,
670 uint32_t *tiling_flags,
671 uint32_t *pitch)
672{
673 dma_resv_assert_held(bo->tbo.base.resv);
674
675 if (tiling_flags)
676 *tiling_flags = bo->tiling_flags;
677 if (pitch)
678 *pitch = bo->pitch;
679}
680
681int radeon_bo_check_tiling(struct radeon_bo *bo, bool has_moved,
682 bool force_drop)
683{
684 if (!force_drop)
685 dma_resv_assert_held(bo->tbo.base.resv);
686
687 if (!(bo->tiling_flags & RADEON_TILING_SURFACE))
688 return 0;
689
690 if (force_drop) {
691 radeon_bo_clear_surface_reg(bo);
692 return 0;
693 }
694
695 if (bo->tbo.resource->mem_type != TTM_PL_VRAM) {
696 if (!has_moved)
697 return 0;
698
699 if (bo->surface_reg >= 0)
700 radeon_bo_clear_surface_reg(bo);
701 return 0;
702 }
703
704 if ((bo->surface_reg >= 0) && !has_moved)
705 return 0;
706
707 return radeon_bo_get_surface_reg(bo);
708}
709
710void radeon_bo_move_notify(struct ttm_buffer_object *bo)
711{
712 struct radeon_bo *rbo;
713
714 if (!radeon_ttm_bo_is_radeon_bo(bo))
715 return;
716
717 rbo = container_of(bo, struct radeon_bo, tbo);
718 radeon_bo_check_tiling(rbo, 0, 1);
719 radeon_vm_bo_invalidate(rbo->rdev, rbo);
720}
721
722vm_fault_t radeon_bo_fault_reserve_notify(struct ttm_buffer_object *bo)
723{
724 struct ttm_operation_ctx ctx = { false, false };
725 struct radeon_device *rdev;
726 struct radeon_bo *rbo;
727 unsigned long offset, size, lpfn;
728 int i, r;
729
730 if (!radeon_ttm_bo_is_radeon_bo(bo))
731 return 0;
732 rbo = container_of(bo, struct radeon_bo, tbo);
733 radeon_bo_check_tiling(rbo, 0, 0);
734 rdev = rbo->rdev;
735 if (bo->resource->mem_type != TTM_PL_VRAM)
736 return 0;
737
738 size = bo->resource->size;
739 offset = bo->resource->start << PAGE_SHIFT;
740 if ((offset + size) <= rdev->mc.visible_vram_size)
741 return 0;
742
743 /* Can't move a pinned BO to visible VRAM */
744 if (rbo->tbo.pin_count > 0)
745 return VM_FAULT_SIGBUS;
746
747 /* hurrah the memory is not visible ! */
748 radeon_ttm_placement_from_domain(rbo, RADEON_GEM_DOMAIN_VRAM);
749 lpfn = rdev->mc.visible_vram_size >> PAGE_SHIFT;
750 for (i = 0; i < rbo->placement.num_placement; i++) {
751 /* Force into visible VRAM */
752 if ((rbo->placements[i].mem_type == TTM_PL_VRAM) &&
753 (!rbo->placements[i].lpfn || rbo->placements[i].lpfn > lpfn))
754 rbo->placements[i].lpfn = lpfn;
755 }
756 r = ttm_bo_validate(bo, &rbo->placement, &ctx);
757 if (unlikely(r == -ENOMEM)) {
758 radeon_ttm_placement_from_domain(rbo, RADEON_GEM_DOMAIN_GTT);
759 r = ttm_bo_validate(bo, &rbo->placement, &ctx);
760 } else if (likely(!r)) {
761 offset = bo->resource->start << PAGE_SHIFT;
762 /* this should never happen */
763 if ((offset + size) > rdev->mc.visible_vram_size)
764 return VM_FAULT_SIGBUS;
765 }
766
767 if (unlikely(r == -EBUSY || r == -ERESTARTSYS))
768 return VM_FAULT_NOPAGE;
769 else if (unlikely(r))
770 return VM_FAULT_SIGBUS;
771
772 ttm_bo_move_to_lru_tail_unlocked(bo);
773 return 0;
774}
775
776/**
777 * radeon_bo_fence - add fence to buffer object
778 *
779 * @bo: buffer object in question
780 * @fence: fence to add
781 * @shared: true if fence should be added shared
782 *
783 */
784void radeon_bo_fence(struct radeon_bo *bo, struct radeon_fence *fence,
785 bool shared)
786{
787 struct dma_resv *resv = bo->tbo.base.resv;
788 int r;
789
790 r = dma_resv_reserve_fences(resv, 1);
791 if (r) {
792 /* As last resort on OOM we block for the fence */
793 dma_fence_wait(&fence->base, false);
794 return;
795 }
796
797 dma_resv_add_fence(resv, &fence->base, shared ?
798 DMA_RESV_USAGE_READ : DMA_RESV_USAGE_WRITE);
799}