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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 <linux/dma-buf.h>
35
36#include <drm/drm_drv.h>
37#include <drm/amdgpu_drm.h>
38#include <drm/drm_cache.h>
39#include "amdgpu.h"
40#include "amdgpu_trace.h"
41#include "amdgpu_amdkfd.h"
42
43/**
44 * DOC: amdgpu_object
45 *
46 * This defines the interfaces to operate on an &amdgpu_bo buffer object which
47 * represents memory used by driver (VRAM, system memory, etc.). The driver
48 * provides DRM/GEM APIs to userspace. DRM/GEM APIs then use these interfaces
49 * to create/destroy/set buffer object which are then managed by the kernel TTM
50 * memory manager.
51 * The interfaces are also used internally by kernel clients, including gfx,
52 * uvd, etc. for kernel managed allocations used by the GPU.
53 *
54 */
55
56static void amdgpu_bo_destroy(struct ttm_buffer_object *tbo)
57{
58 struct amdgpu_bo *bo = ttm_to_amdgpu_bo(tbo);
59
60 amdgpu_bo_kunmap(bo);
61
62 if (bo->tbo.base.import_attach)
63 drm_prime_gem_destroy(&bo->tbo.base, bo->tbo.sg);
64 drm_gem_object_release(&bo->tbo.base);
65 amdgpu_bo_unref(&bo->parent);
66 kvfree(bo);
67}
68
69static void amdgpu_bo_user_destroy(struct ttm_buffer_object *tbo)
70{
71 struct amdgpu_bo *bo = ttm_to_amdgpu_bo(tbo);
72 struct amdgpu_bo_user *ubo;
73
74 ubo = to_amdgpu_bo_user(bo);
75 kfree(ubo->metadata);
76 amdgpu_bo_destroy(tbo);
77}
78
79static void amdgpu_bo_vm_destroy(struct ttm_buffer_object *tbo)
80{
81 struct amdgpu_device *adev = amdgpu_ttm_adev(tbo->bdev);
82 struct amdgpu_bo *shadow_bo = ttm_to_amdgpu_bo(tbo), *bo;
83 struct amdgpu_bo_vm *vmbo;
84
85 bo = shadow_bo->parent;
86 vmbo = to_amdgpu_bo_vm(bo);
87 /* in case amdgpu_device_recover_vram got NULL of bo->parent */
88 if (!list_empty(&vmbo->shadow_list)) {
89 mutex_lock(&adev->shadow_list_lock);
90 list_del_init(&vmbo->shadow_list);
91 mutex_unlock(&adev->shadow_list_lock);
92 }
93
94 amdgpu_bo_destroy(tbo);
95}
96
97/**
98 * amdgpu_bo_is_amdgpu_bo - check if the buffer object is an &amdgpu_bo
99 * @bo: buffer object to be checked
100 *
101 * Uses destroy function associated with the object to determine if this is
102 * an &amdgpu_bo.
103 *
104 * Returns:
105 * true if the object belongs to &amdgpu_bo, false if not.
106 */
107bool amdgpu_bo_is_amdgpu_bo(struct ttm_buffer_object *bo)
108{
109 if (bo->destroy == &amdgpu_bo_destroy ||
110 bo->destroy == &amdgpu_bo_user_destroy ||
111 bo->destroy == &amdgpu_bo_vm_destroy)
112 return true;
113
114 return false;
115}
116
117/**
118 * amdgpu_bo_placement_from_domain - set buffer's placement
119 * @abo: &amdgpu_bo buffer object whose placement is to be set
120 * @domain: requested domain
121 *
122 * Sets buffer's placement according to requested domain and the buffer's
123 * flags.
124 */
125void amdgpu_bo_placement_from_domain(struct amdgpu_bo *abo, u32 domain)
126{
127 struct amdgpu_device *adev = amdgpu_ttm_adev(abo->tbo.bdev);
128 struct ttm_placement *placement = &abo->placement;
129 struct ttm_place *places = abo->placements;
130 u64 flags = abo->flags;
131 u32 c = 0;
132
133 if (domain & AMDGPU_GEM_DOMAIN_VRAM) {
134 unsigned int visible_pfn = adev->gmc.visible_vram_size >> PAGE_SHIFT;
135 int8_t mem_id = KFD_XCP_MEM_ID(adev, abo->xcp_id);
136
137 if (adev->gmc.mem_partitions && mem_id >= 0) {
138 places[c].fpfn = adev->gmc.mem_partitions[mem_id].range.fpfn;
139 /*
140 * memory partition range lpfn is inclusive start + size - 1
141 * TTM place lpfn is exclusive start + size
142 */
143 places[c].lpfn = adev->gmc.mem_partitions[mem_id].range.lpfn + 1;
144 } else {
145 places[c].fpfn = 0;
146 places[c].lpfn = 0;
147 }
148 places[c].mem_type = TTM_PL_VRAM;
149 places[c].flags = 0;
150
151 if (flags & AMDGPU_GEM_CREATE_CPU_ACCESS_REQUIRED)
152 places[c].lpfn = min_not_zero(places[c].lpfn, visible_pfn);
153 else
154 places[c].flags |= TTM_PL_FLAG_TOPDOWN;
155
156 if (flags & AMDGPU_GEM_CREATE_VRAM_CONTIGUOUS)
157 places[c].flags |= TTM_PL_FLAG_CONTIGUOUS;
158 c++;
159 }
160
161 if (domain & AMDGPU_GEM_DOMAIN_DOORBELL) {
162 places[c].fpfn = 0;
163 places[c].lpfn = 0;
164 places[c].mem_type = AMDGPU_PL_DOORBELL;
165 places[c].flags = 0;
166 c++;
167 }
168
169 if (domain & AMDGPU_GEM_DOMAIN_GTT) {
170 places[c].fpfn = 0;
171 places[c].lpfn = 0;
172 places[c].mem_type =
173 abo->flags & AMDGPU_GEM_CREATE_PREEMPTIBLE ?
174 AMDGPU_PL_PREEMPT : TTM_PL_TT;
175 places[c].flags = 0;
176 c++;
177 }
178
179 if (domain & AMDGPU_GEM_DOMAIN_CPU) {
180 places[c].fpfn = 0;
181 places[c].lpfn = 0;
182 places[c].mem_type = TTM_PL_SYSTEM;
183 places[c].flags = 0;
184 c++;
185 }
186
187 if (domain & AMDGPU_GEM_DOMAIN_GDS) {
188 places[c].fpfn = 0;
189 places[c].lpfn = 0;
190 places[c].mem_type = AMDGPU_PL_GDS;
191 places[c].flags = 0;
192 c++;
193 }
194
195 if (domain & AMDGPU_GEM_DOMAIN_GWS) {
196 places[c].fpfn = 0;
197 places[c].lpfn = 0;
198 places[c].mem_type = AMDGPU_PL_GWS;
199 places[c].flags = 0;
200 c++;
201 }
202
203 if (domain & AMDGPU_GEM_DOMAIN_OA) {
204 places[c].fpfn = 0;
205 places[c].lpfn = 0;
206 places[c].mem_type = AMDGPU_PL_OA;
207 places[c].flags = 0;
208 c++;
209 }
210
211 if (!c) {
212 places[c].fpfn = 0;
213 places[c].lpfn = 0;
214 places[c].mem_type = TTM_PL_SYSTEM;
215 places[c].flags = 0;
216 c++;
217 }
218
219 BUG_ON(c > AMDGPU_BO_MAX_PLACEMENTS);
220
221 placement->num_placement = c;
222 placement->placement = places;
223}
224
225/**
226 * amdgpu_bo_create_reserved - create reserved BO for kernel use
227 *
228 * @adev: amdgpu device object
229 * @size: size for the new BO
230 * @align: alignment for the new BO
231 * @domain: where to place it
232 * @bo_ptr: used to initialize BOs in structures
233 * @gpu_addr: GPU addr of the pinned BO
234 * @cpu_addr: optional CPU address mapping
235 *
236 * Allocates and pins a BO for kernel internal use, and returns it still
237 * reserved.
238 *
239 * Note: For bo_ptr new BO is only created if bo_ptr points to NULL.
240 *
241 * Returns:
242 * 0 on success, negative error code otherwise.
243 */
244int amdgpu_bo_create_reserved(struct amdgpu_device *adev,
245 unsigned long size, int align,
246 u32 domain, struct amdgpu_bo **bo_ptr,
247 u64 *gpu_addr, void **cpu_addr)
248{
249 struct amdgpu_bo_param bp;
250 bool free = false;
251 int r;
252
253 if (!size) {
254 amdgpu_bo_unref(bo_ptr);
255 return 0;
256 }
257
258 memset(&bp, 0, sizeof(bp));
259 bp.size = size;
260 bp.byte_align = align;
261 bp.domain = domain;
262 bp.flags = cpu_addr ? AMDGPU_GEM_CREATE_CPU_ACCESS_REQUIRED
263 : AMDGPU_GEM_CREATE_NO_CPU_ACCESS;
264 bp.flags |= AMDGPU_GEM_CREATE_VRAM_CONTIGUOUS;
265 bp.type = ttm_bo_type_kernel;
266 bp.resv = NULL;
267 bp.bo_ptr_size = sizeof(struct amdgpu_bo);
268
269 if (!*bo_ptr) {
270 r = amdgpu_bo_create(adev, &bp, bo_ptr);
271 if (r) {
272 dev_err(adev->dev, "(%d) failed to allocate kernel bo\n",
273 r);
274 return r;
275 }
276 free = true;
277 }
278
279 r = amdgpu_bo_reserve(*bo_ptr, false);
280 if (r) {
281 dev_err(adev->dev, "(%d) failed to reserve kernel bo\n", r);
282 goto error_free;
283 }
284
285 r = amdgpu_bo_pin(*bo_ptr, domain);
286 if (r) {
287 dev_err(adev->dev, "(%d) kernel bo pin failed\n", r);
288 goto error_unreserve;
289 }
290
291 r = amdgpu_ttm_alloc_gart(&(*bo_ptr)->tbo);
292 if (r) {
293 dev_err(adev->dev, "%p bind failed\n", *bo_ptr);
294 goto error_unpin;
295 }
296
297 if (gpu_addr)
298 *gpu_addr = amdgpu_bo_gpu_offset(*bo_ptr);
299
300 if (cpu_addr) {
301 r = amdgpu_bo_kmap(*bo_ptr, cpu_addr);
302 if (r) {
303 dev_err(adev->dev, "(%d) kernel bo map failed\n", r);
304 goto error_unpin;
305 }
306 }
307
308 return 0;
309
310error_unpin:
311 amdgpu_bo_unpin(*bo_ptr);
312error_unreserve:
313 amdgpu_bo_unreserve(*bo_ptr);
314
315error_free:
316 if (free)
317 amdgpu_bo_unref(bo_ptr);
318
319 return r;
320}
321
322/**
323 * amdgpu_bo_create_kernel - create BO for kernel use
324 *
325 * @adev: amdgpu device object
326 * @size: size for the new BO
327 * @align: alignment for the new BO
328 * @domain: where to place it
329 * @bo_ptr: used to initialize BOs in structures
330 * @gpu_addr: GPU addr of the pinned BO
331 * @cpu_addr: optional CPU address mapping
332 *
333 * Allocates and pins a BO for kernel internal use.
334 *
335 * Note: For bo_ptr new BO is only created if bo_ptr points to NULL.
336 *
337 * Returns:
338 * 0 on success, negative error code otherwise.
339 */
340int amdgpu_bo_create_kernel(struct amdgpu_device *adev,
341 unsigned long size, int align,
342 u32 domain, struct amdgpu_bo **bo_ptr,
343 u64 *gpu_addr, void **cpu_addr)
344{
345 int r;
346
347 r = amdgpu_bo_create_reserved(adev, size, align, domain, bo_ptr,
348 gpu_addr, cpu_addr);
349
350 if (r)
351 return r;
352
353 if (*bo_ptr)
354 amdgpu_bo_unreserve(*bo_ptr);
355
356 return 0;
357}
358
359/**
360 * amdgpu_bo_create_kernel_at - create BO for kernel use at specific location
361 *
362 * @adev: amdgpu device object
363 * @offset: offset of the BO
364 * @size: size of the BO
365 * @bo_ptr: used to initialize BOs in structures
366 * @cpu_addr: optional CPU address mapping
367 *
368 * Creates a kernel BO at a specific offset in VRAM.
369 *
370 * Returns:
371 * 0 on success, negative error code otherwise.
372 */
373int amdgpu_bo_create_kernel_at(struct amdgpu_device *adev,
374 uint64_t offset, uint64_t size,
375 struct amdgpu_bo **bo_ptr, void **cpu_addr)
376{
377 struct ttm_operation_ctx ctx = { false, false };
378 unsigned int i;
379 int r;
380
381 offset &= PAGE_MASK;
382 size = ALIGN(size, PAGE_SIZE);
383
384 r = amdgpu_bo_create_reserved(adev, size, PAGE_SIZE,
385 AMDGPU_GEM_DOMAIN_VRAM, bo_ptr, NULL,
386 cpu_addr);
387 if (r)
388 return r;
389
390 if ((*bo_ptr) == NULL)
391 return 0;
392
393 /*
394 * Remove the original mem node and create a new one at the request
395 * position.
396 */
397 if (cpu_addr)
398 amdgpu_bo_kunmap(*bo_ptr);
399
400 ttm_resource_free(&(*bo_ptr)->tbo, &(*bo_ptr)->tbo.resource);
401
402 for (i = 0; i < (*bo_ptr)->placement.num_placement; ++i) {
403 (*bo_ptr)->placements[i].fpfn = offset >> PAGE_SHIFT;
404 (*bo_ptr)->placements[i].lpfn = (offset + size) >> PAGE_SHIFT;
405 }
406 r = ttm_bo_mem_space(&(*bo_ptr)->tbo, &(*bo_ptr)->placement,
407 &(*bo_ptr)->tbo.resource, &ctx);
408 if (r)
409 goto error;
410
411 if (cpu_addr) {
412 r = amdgpu_bo_kmap(*bo_ptr, cpu_addr);
413 if (r)
414 goto error;
415 }
416
417 amdgpu_bo_unreserve(*bo_ptr);
418 return 0;
419
420error:
421 amdgpu_bo_unreserve(*bo_ptr);
422 amdgpu_bo_unref(bo_ptr);
423 return r;
424}
425
426/**
427 * amdgpu_bo_free_kernel - free BO for kernel use
428 *
429 * @bo: amdgpu BO to free
430 * @gpu_addr: pointer to where the BO's GPU memory space address was stored
431 * @cpu_addr: pointer to where the BO's CPU memory space address was stored
432 *
433 * unmaps and unpin a BO for kernel internal use.
434 */
435void amdgpu_bo_free_kernel(struct amdgpu_bo **bo, u64 *gpu_addr,
436 void **cpu_addr)
437{
438 if (*bo == NULL)
439 return;
440
441 WARN_ON(amdgpu_ttm_adev((*bo)->tbo.bdev)->in_suspend);
442
443 if (likely(amdgpu_bo_reserve(*bo, true) == 0)) {
444 if (cpu_addr)
445 amdgpu_bo_kunmap(*bo);
446
447 amdgpu_bo_unpin(*bo);
448 amdgpu_bo_unreserve(*bo);
449 }
450 amdgpu_bo_unref(bo);
451
452 if (gpu_addr)
453 *gpu_addr = 0;
454
455 if (cpu_addr)
456 *cpu_addr = NULL;
457}
458
459/* Validate bo size is bit bigger than the request domain */
460static bool amdgpu_bo_validate_size(struct amdgpu_device *adev,
461 unsigned long size, u32 domain)
462{
463 struct ttm_resource_manager *man = NULL;
464
465 /*
466 * If GTT is part of requested domains the check must succeed to
467 * allow fall back to GTT.
468 */
469 if (domain & AMDGPU_GEM_DOMAIN_GTT)
470 man = ttm_manager_type(&adev->mman.bdev, TTM_PL_TT);
471 else if (domain & AMDGPU_GEM_DOMAIN_VRAM)
472 man = ttm_manager_type(&adev->mman.bdev, TTM_PL_VRAM);
473 else
474 return true;
475
476 if (!man) {
477 if (domain & AMDGPU_GEM_DOMAIN_GTT)
478 WARN_ON_ONCE("GTT domain requested but GTT mem manager uninitialized");
479 return false;
480 }
481
482 /* TODO add more domains checks, such as AMDGPU_GEM_DOMAIN_CPU, _DOMAIN_DOORBELL */
483 if (size < man->size)
484 return true;
485
486 DRM_DEBUG("BO size %lu > total memory in domain: %llu\n", size, man->size);
487 return false;
488}
489
490bool amdgpu_bo_support_uswc(u64 bo_flags)
491{
492
493#ifdef CONFIG_X86_32
494 /* XXX: Write-combined CPU mappings of GTT seem broken on 32-bit
495 * See https://bugs.freedesktop.org/show_bug.cgi?id=84627
496 */
497 return false;
498#elif defined(CONFIG_X86) && !defined(CONFIG_X86_PAT)
499 /* Don't try to enable write-combining when it can't work, or things
500 * may be slow
501 * See https://bugs.freedesktop.org/show_bug.cgi?id=88758
502 */
503
504#ifndef CONFIG_COMPILE_TEST
505#warning Please enable CONFIG_MTRR and CONFIG_X86_PAT for better performance \
506 thanks to write-combining
507#endif
508
509 if (bo_flags & AMDGPU_GEM_CREATE_CPU_GTT_USWC)
510 DRM_INFO_ONCE("Please enable CONFIG_MTRR and CONFIG_X86_PAT for "
511 "better performance thanks to write-combining\n");
512 return false;
513#else
514 /* For architectures that don't support WC memory,
515 * mask out the WC flag from the BO
516 */
517 if (!drm_arch_can_wc_memory())
518 return false;
519
520 return true;
521#endif
522}
523
524/**
525 * amdgpu_bo_create - create an &amdgpu_bo buffer object
526 * @adev: amdgpu device object
527 * @bp: parameters to be used for the buffer object
528 * @bo_ptr: pointer to the buffer object pointer
529 *
530 * Creates an &amdgpu_bo buffer object.
531 *
532 * Returns:
533 * 0 for success or a negative error code on failure.
534 */
535int amdgpu_bo_create(struct amdgpu_device *adev,
536 struct amdgpu_bo_param *bp,
537 struct amdgpu_bo **bo_ptr)
538{
539 struct ttm_operation_ctx ctx = {
540 .interruptible = (bp->type != ttm_bo_type_kernel),
541 .no_wait_gpu = bp->no_wait_gpu,
542 /* We opt to avoid OOM on system pages allocations */
543 .gfp_retry_mayfail = true,
544 .allow_res_evict = bp->type != ttm_bo_type_kernel,
545 .resv = bp->resv
546 };
547 struct amdgpu_bo *bo;
548 unsigned long page_align, size = bp->size;
549 int r;
550
551 /* Note that GDS/GWS/OA allocates 1 page per byte/resource. */
552 if (bp->domain & (AMDGPU_GEM_DOMAIN_GWS | AMDGPU_GEM_DOMAIN_OA)) {
553 /* GWS and OA don't need any alignment. */
554 page_align = bp->byte_align;
555 size <<= PAGE_SHIFT;
556
557 } else if (bp->domain & AMDGPU_GEM_DOMAIN_GDS) {
558 /* Both size and alignment must be a multiple of 4. */
559 page_align = ALIGN(bp->byte_align, 4);
560 size = ALIGN(size, 4) << PAGE_SHIFT;
561 } else {
562 /* Memory should be aligned at least to a page size. */
563 page_align = ALIGN(bp->byte_align, PAGE_SIZE) >> PAGE_SHIFT;
564 size = ALIGN(size, PAGE_SIZE);
565 }
566
567 if (!amdgpu_bo_validate_size(adev, size, bp->domain))
568 return -ENOMEM;
569
570 BUG_ON(bp->bo_ptr_size < sizeof(struct amdgpu_bo));
571
572 *bo_ptr = NULL;
573 bo = kvzalloc(bp->bo_ptr_size, GFP_KERNEL);
574 if (bo == NULL)
575 return -ENOMEM;
576 drm_gem_private_object_init(adev_to_drm(adev), &bo->tbo.base, size);
577 bo->vm_bo = NULL;
578 bo->preferred_domains = bp->preferred_domain ? bp->preferred_domain :
579 bp->domain;
580 bo->allowed_domains = bo->preferred_domains;
581 if (bp->type != ttm_bo_type_kernel &&
582 !(bp->flags & AMDGPU_GEM_CREATE_DISCARDABLE) &&
583 bo->allowed_domains == AMDGPU_GEM_DOMAIN_VRAM)
584 bo->allowed_domains |= AMDGPU_GEM_DOMAIN_GTT;
585
586 bo->flags = bp->flags;
587
588 if (adev->gmc.mem_partitions)
589 /* For GPUs with spatial partitioning, bo->xcp_id=-1 means any partition */
590 bo->xcp_id = bp->xcp_id_plus1 - 1;
591 else
592 /* For GPUs without spatial partitioning */
593 bo->xcp_id = 0;
594
595 if (!amdgpu_bo_support_uswc(bo->flags))
596 bo->flags &= ~AMDGPU_GEM_CREATE_CPU_GTT_USWC;
597
598 if (adev->ras_enabled)
599 bo->flags |= AMDGPU_GEM_CREATE_VRAM_WIPE_ON_RELEASE;
600
601 bo->tbo.bdev = &adev->mman.bdev;
602 if (bp->domain & (AMDGPU_GEM_DOMAIN_GWS | AMDGPU_GEM_DOMAIN_OA |
603 AMDGPU_GEM_DOMAIN_GDS))
604 amdgpu_bo_placement_from_domain(bo, AMDGPU_GEM_DOMAIN_CPU);
605 else
606 amdgpu_bo_placement_from_domain(bo, bp->domain);
607 if (bp->type == ttm_bo_type_kernel)
608 bo->tbo.priority = 2;
609 else if (!(bp->flags & AMDGPU_GEM_CREATE_DISCARDABLE))
610 bo->tbo.priority = 1;
611
612 if (!bp->destroy)
613 bp->destroy = &amdgpu_bo_destroy;
614
615 r = ttm_bo_init_reserved(&adev->mman.bdev, &bo->tbo, bp->type,
616 &bo->placement, page_align, &ctx, NULL,
617 bp->resv, bp->destroy);
618 if (unlikely(r != 0))
619 return r;
620
621 if (!amdgpu_gmc_vram_full_visible(&adev->gmc) &&
622 amdgpu_res_cpu_visible(adev, bo->tbo.resource))
623 amdgpu_cs_report_moved_bytes(adev, ctx.bytes_moved,
624 ctx.bytes_moved);
625 else
626 amdgpu_cs_report_moved_bytes(adev, ctx.bytes_moved, 0);
627
628 if (bp->flags & AMDGPU_GEM_CREATE_VRAM_CLEARED &&
629 bo->tbo.resource->mem_type == TTM_PL_VRAM) {
630 struct dma_fence *fence;
631
632 r = amdgpu_fill_buffer(bo, 0, bo->tbo.base.resv, &fence, true);
633 if (unlikely(r))
634 goto fail_unreserve;
635
636 dma_resv_add_fence(bo->tbo.base.resv, fence,
637 DMA_RESV_USAGE_KERNEL);
638 dma_fence_put(fence);
639 }
640 if (!bp->resv)
641 amdgpu_bo_unreserve(bo);
642 *bo_ptr = bo;
643
644 trace_amdgpu_bo_create(bo);
645
646 /* Treat CPU_ACCESS_REQUIRED only as a hint if given by UMD */
647 if (bp->type == ttm_bo_type_device)
648 bo->flags &= ~AMDGPU_GEM_CREATE_CPU_ACCESS_REQUIRED;
649
650 return 0;
651
652fail_unreserve:
653 if (!bp->resv)
654 dma_resv_unlock(bo->tbo.base.resv);
655 amdgpu_bo_unref(&bo);
656 return r;
657}
658
659/**
660 * amdgpu_bo_create_user - create an &amdgpu_bo_user buffer object
661 * @adev: amdgpu device object
662 * @bp: parameters to be used for the buffer object
663 * @ubo_ptr: pointer to the buffer object pointer
664 *
665 * Create a BO to be used by user application;
666 *
667 * Returns:
668 * 0 for success or a negative error code on failure.
669 */
670
671int amdgpu_bo_create_user(struct amdgpu_device *adev,
672 struct amdgpu_bo_param *bp,
673 struct amdgpu_bo_user **ubo_ptr)
674{
675 struct amdgpu_bo *bo_ptr;
676 int r;
677
678 bp->bo_ptr_size = sizeof(struct amdgpu_bo_user);
679 bp->destroy = &amdgpu_bo_user_destroy;
680 r = amdgpu_bo_create(adev, bp, &bo_ptr);
681 if (r)
682 return r;
683
684 *ubo_ptr = to_amdgpu_bo_user(bo_ptr);
685 return r;
686}
687
688/**
689 * amdgpu_bo_create_vm - create an &amdgpu_bo_vm buffer object
690 * @adev: amdgpu device object
691 * @bp: parameters to be used for the buffer object
692 * @vmbo_ptr: pointer to the buffer object pointer
693 *
694 * Create a BO to be for GPUVM.
695 *
696 * Returns:
697 * 0 for success or a negative error code on failure.
698 */
699
700int amdgpu_bo_create_vm(struct amdgpu_device *adev,
701 struct amdgpu_bo_param *bp,
702 struct amdgpu_bo_vm **vmbo_ptr)
703{
704 struct amdgpu_bo *bo_ptr;
705 int r;
706
707 /* bo_ptr_size will be determined by the caller and it depends on
708 * num of amdgpu_vm_pt entries.
709 */
710 BUG_ON(bp->bo_ptr_size < sizeof(struct amdgpu_bo_vm));
711 r = amdgpu_bo_create(adev, bp, &bo_ptr);
712 if (r)
713 return r;
714
715 *vmbo_ptr = to_amdgpu_bo_vm(bo_ptr);
716 return r;
717}
718
719/**
720 * amdgpu_bo_add_to_shadow_list - add a BO to the shadow list
721 *
722 * @vmbo: BO that will be inserted into the shadow list
723 *
724 * Insert a BO to the shadow list.
725 */
726void amdgpu_bo_add_to_shadow_list(struct amdgpu_bo_vm *vmbo)
727{
728 struct amdgpu_device *adev = amdgpu_ttm_adev(vmbo->bo.tbo.bdev);
729
730 mutex_lock(&adev->shadow_list_lock);
731 list_add_tail(&vmbo->shadow_list, &adev->shadow_list);
732 vmbo->shadow->parent = amdgpu_bo_ref(&vmbo->bo);
733 vmbo->shadow->tbo.destroy = &amdgpu_bo_vm_destroy;
734 mutex_unlock(&adev->shadow_list_lock);
735}
736
737/**
738 * amdgpu_bo_restore_shadow - restore an &amdgpu_bo shadow
739 *
740 * @shadow: &amdgpu_bo shadow to be restored
741 * @fence: dma_fence associated with the operation
742 *
743 * Copies a buffer object's shadow content back to the object.
744 * This is used for recovering a buffer from its shadow in case of a gpu
745 * reset where vram context may be lost.
746 *
747 * Returns:
748 * 0 for success or a negative error code on failure.
749 */
750int amdgpu_bo_restore_shadow(struct amdgpu_bo *shadow, struct dma_fence **fence)
751
752{
753 struct amdgpu_device *adev = amdgpu_ttm_adev(shadow->tbo.bdev);
754 struct amdgpu_ring *ring = adev->mman.buffer_funcs_ring;
755 uint64_t shadow_addr, parent_addr;
756
757 shadow_addr = amdgpu_bo_gpu_offset(shadow);
758 parent_addr = amdgpu_bo_gpu_offset(shadow->parent);
759
760 return amdgpu_copy_buffer(ring, shadow_addr, parent_addr,
761 amdgpu_bo_size(shadow), NULL, fence,
762 true, false, false);
763}
764
765/**
766 * amdgpu_bo_kmap - map an &amdgpu_bo buffer object
767 * @bo: &amdgpu_bo buffer object to be mapped
768 * @ptr: kernel virtual address to be returned
769 *
770 * Calls ttm_bo_kmap() to set up the kernel virtual mapping; calls
771 * amdgpu_bo_kptr() to get the kernel virtual address.
772 *
773 * Returns:
774 * 0 for success or a negative error code on failure.
775 */
776int amdgpu_bo_kmap(struct amdgpu_bo *bo, void **ptr)
777{
778 void *kptr;
779 long r;
780
781 if (bo->flags & AMDGPU_GEM_CREATE_NO_CPU_ACCESS)
782 return -EPERM;
783
784 r = dma_resv_wait_timeout(bo->tbo.base.resv, DMA_RESV_USAGE_KERNEL,
785 false, MAX_SCHEDULE_TIMEOUT);
786 if (r < 0)
787 return r;
788
789 kptr = amdgpu_bo_kptr(bo);
790 if (kptr) {
791 if (ptr)
792 *ptr = kptr;
793 return 0;
794 }
795
796 r = ttm_bo_kmap(&bo->tbo, 0, PFN_UP(bo->tbo.base.size), &bo->kmap);
797 if (r)
798 return r;
799
800 if (ptr)
801 *ptr = amdgpu_bo_kptr(bo);
802
803 return 0;
804}
805
806/**
807 * amdgpu_bo_kptr - returns a kernel virtual address of the buffer object
808 * @bo: &amdgpu_bo buffer object
809 *
810 * Calls ttm_kmap_obj_virtual() to get the kernel virtual address
811 *
812 * Returns:
813 * the virtual address of a buffer object area.
814 */
815void *amdgpu_bo_kptr(struct amdgpu_bo *bo)
816{
817 bool is_iomem;
818
819 return ttm_kmap_obj_virtual(&bo->kmap, &is_iomem);
820}
821
822/**
823 * amdgpu_bo_kunmap - unmap an &amdgpu_bo buffer object
824 * @bo: &amdgpu_bo buffer object to be unmapped
825 *
826 * Unmaps a kernel map set up by amdgpu_bo_kmap().
827 */
828void amdgpu_bo_kunmap(struct amdgpu_bo *bo)
829{
830 if (bo->kmap.bo)
831 ttm_bo_kunmap(&bo->kmap);
832}
833
834/**
835 * amdgpu_bo_ref - reference an &amdgpu_bo buffer object
836 * @bo: &amdgpu_bo buffer object
837 *
838 * References the contained &ttm_buffer_object.
839 *
840 * Returns:
841 * a refcounted pointer to the &amdgpu_bo buffer object.
842 */
843struct amdgpu_bo *amdgpu_bo_ref(struct amdgpu_bo *bo)
844{
845 if (bo == NULL)
846 return NULL;
847
848 ttm_bo_get(&bo->tbo);
849 return bo;
850}
851
852/**
853 * amdgpu_bo_unref - unreference an &amdgpu_bo buffer object
854 * @bo: &amdgpu_bo buffer object
855 *
856 * Unreferences the contained &ttm_buffer_object and clear the pointer
857 */
858void amdgpu_bo_unref(struct amdgpu_bo **bo)
859{
860 struct ttm_buffer_object *tbo;
861
862 if ((*bo) == NULL)
863 return;
864
865 tbo = &((*bo)->tbo);
866 ttm_bo_put(tbo);
867 *bo = NULL;
868}
869
870/**
871 * amdgpu_bo_pin_restricted - pin an &amdgpu_bo buffer object
872 * @bo: &amdgpu_bo buffer object to be pinned
873 * @domain: domain to be pinned to
874 * @min_offset: the start of requested address range
875 * @max_offset: the end of requested address range
876 *
877 * Pins the buffer object according to requested domain and address range. If
878 * the memory is unbound gart memory, binds the pages into gart table. Adjusts
879 * pin_count and pin_size accordingly.
880 *
881 * Pinning means to lock pages in memory along with keeping them at a fixed
882 * offset. It is required when a buffer can not be moved, for example, when
883 * a display buffer is being scanned out.
884 *
885 * Compared with amdgpu_bo_pin(), this function gives more flexibility on
886 * where to pin a buffer if there are specific restrictions on where a buffer
887 * must be located.
888 *
889 * Returns:
890 * 0 for success or a negative error code on failure.
891 */
892int amdgpu_bo_pin_restricted(struct amdgpu_bo *bo, u32 domain,
893 u64 min_offset, u64 max_offset)
894{
895 struct amdgpu_device *adev = amdgpu_ttm_adev(bo->tbo.bdev);
896 struct ttm_operation_ctx ctx = { false, false };
897 int r, i;
898
899 if (amdgpu_ttm_tt_get_usermm(bo->tbo.ttm))
900 return -EPERM;
901
902 if (WARN_ON_ONCE(min_offset > max_offset))
903 return -EINVAL;
904
905 /* Check domain to be pinned to against preferred domains */
906 if (bo->preferred_domains & domain)
907 domain = bo->preferred_domains & domain;
908
909 /* A shared bo cannot be migrated to VRAM */
910 if (bo->tbo.base.import_attach) {
911 if (domain & AMDGPU_GEM_DOMAIN_GTT)
912 domain = AMDGPU_GEM_DOMAIN_GTT;
913 else
914 return -EINVAL;
915 }
916
917 if (bo->tbo.pin_count) {
918 uint32_t mem_type = bo->tbo.resource->mem_type;
919 uint32_t mem_flags = bo->tbo.resource->placement;
920
921 if (!(domain & amdgpu_mem_type_to_domain(mem_type)))
922 return -EINVAL;
923
924 if ((mem_type == TTM_PL_VRAM) &&
925 (bo->flags & AMDGPU_GEM_CREATE_VRAM_CONTIGUOUS) &&
926 !(mem_flags & TTM_PL_FLAG_CONTIGUOUS))
927 return -EINVAL;
928
929 ttm_bo_pin(&bo->tbo);
930
931 if (max_offset != 0) {
932 u64 domain_start = amdgpu_ttm_domain_start(adev,
933 mem_type);
934 WARN_ON_ONCE(max_offset <
935 (amdgpu_bo_gpu_offset(bo) - domain_start));
936 }
937
938 return 0;
939 }
940
941 /* This assumes only APU display buffers are pinned with (VRAM|GTT).
942 * See function amdgpu_display_supported_domains()
943 */
944 domain = amdgpu_bo_get_preferred_domain(adev, domain);
945
946 if (bo->tbo.base.import_attach)
947 dma_buf_pin(bo->tbo.base.import_attach);
948
949 /* force to pin into visible video ram */
950 if (!(bo->flags & AMDGPU_GEM_CREATE_NO_CPU_ACCESS))
951 bo->flags |= AMDGPU_GEM_CREATE_CPU_ACCESS_REQUIRED;
952 amdgpu_bo_placement_from_domain(bo, domain);
953 for (i = 0; i < bo->placement.num_placement; i++) {
954 unsigned int fpfn, lpfn;
955
956 fpfn = min_offset >> PAGE_SHIFT;
957 lpfn = max_offset >> PAGE_SHIFT;
958
959 if (fpfn > bo->placements[i].fpfn)
960 bo->placements[i].fpfn = fpfn;
961 if (!bo->placements[i].lpfn ||
962 (lpfn && lpfn < bo->placements[i].lpfn))
963 bo->placements[i].lpfn = lpfn;
964 }
965
966 r = ttm_bo_validate(&bo->tbo, &bo->placement, &ctx);
967 if (unlikely(r)) {
968 dev_err(adev->dev, "%p pin failed\n", bo);
969 goto error;
970 }
971
972 ttm_bo_pin(&bo->tbo);
973
974 domain = amdgpu_mem_type_to_domain(bo->tbo.resource->mem_type);
975 if (domain == AMDGPU_GEM_DOMAIN_VRAM) {
976 atomic64_add(amdgpu_bo_size(bo), &adev->vram_pin_size);
977 atomic64_add(amdgpu_vram_mgr_bo_visible_size(bo),
978 &adev->visible_pin_size);
979 } else if (domain == AMDGPU_GEM_DOMAIN_GTT) {
980 atomic64_add(amdgpu_bo_size(bo), &adev->gart_pin_size);
981 }
982
983error:
984 return r;
985}
986
987/**
988 * amdgpu_bo_pin - pin an &amdgpu_bo buffer object
989 * @bo: &amdgpu_bo buffer object to be pinned
990 * @domain: domain to be pinned to
991 *
992 * A simple wrapper to amdgpu_bo_pin_restricted().
993 * Provides a simpler API for buffers that do not have any strict restrictions
994 * on where a buffer must be located.
995 *
996 * Returns:
997 * 0 for success or a negative error code on failure.
998 */
999int amdgpu_bo_pin(struct amdgpu_bo *bo, u32 domain)
1000{
1001 bo->flags |= AMDGPU_GEM_CREATE_VRAM_CONTIGUOUS;
1002 return amdgpu_bo_pin_restricted(bo, domain, 0, 0);
1003}
1004
1005/**
1006 * amdgpu_bo_unpin - unpin an &amdgpu_bo buffer object
1007 * @bo: &amdgpu_bo buffer object to be unpinned
1008 *
1009 * Decreases the pin_count, and clears the flags if pin_count reaches 0.
1010 * Changes placement and pin size accordingly.
1011 *
1012 * Returns:
1013 * 0 for success or a negative error code on failure.
1014 */
1015void amdgpu_bo_unpin(struct amdgpu_bo *bo)
1016{
1017 struct amdgpu_device *adev = amdgpu_ttm_adev(bo->tbo.bdev);
1018
1019 ttm_bo_unpin(&bo->tbo);
1020 if (bo->tbo.pin_count)
1021 return;
1022
1023 if (bo->tbo.base.import_attach)
1024 dma_buf_unpin(bo->tbo.base.import_attach);
1025
1026 if (bo->tbo.resource->mem_type == TTM_PL_VRAM) {
1027 atomic64_sub(amdgpu_bo_size(bo), &adev->vram_pin_size);
1028 atomic64_sub(amdgpu_vram_mgr_bo_visible_size(bo),
1029 &adev->visible_pin_size);
1030 } else if (bo->tbo.resource->mem_type == TTM_PL_TT) {
1031 atomic64_sub(amdgpu_bo_size(bo), &adev->gart_pin_size);
1032 }
1033
1034}
1035
1036static const char * const amdgpu_vram_names[] = {
1037 "UNKNOWN",
1038 "GDDR1",
1039 "DDR2",
1040 "GDDR3",
1041 "GDDR4",
1042 "GDDR5",
1043 "HBM",
1044 "DDR3",
1045 "DDR4",
1046 "GDDR6",
1047 "DDR5",
1048 "LPDDR4",
1049 "LPDDR5"
1050};
1051
1052/**
1053 * amdgpu_bo_init - initialize memory manager
1054 * @adev: amdgpu device object
1055 *
1056 * Calls amdgpu_ttm_init() to initialize amdgpu memory manager.
1057 *
1058 * Returns:
1059 * 0 for success or a negative error code on failure.
1060 */
1061int amdgpu_bo_init(struct amdgpu_device *adev)
1062{
1063 /* On A+A platform, VRAM can be mapped as WB */
1064 if (!adev->gmc.xgmi.connected_to_cpu && !adev->gmc.is_app_apu) {
1065 /* reserve PAT memory space to WC for VRAM */
1066 int r = arch_io_reserve_memtype_wc(adev->gmc.aper_base,
1067 adev->gmc.aper_size);
1068
1069 if (r) {
1070 DRM_ERROR("Unable to set WC memtype for the aperture base\n");
1071 return r;
1072 }
1073
1074 /* Add an MTRR for the VRAM */
1075 adev->gmc.vram_mtrr = arch_phys_wc_add(adev->gmc.aper_base,
1076 adev->gmc.aper_size);
1077 }
1078
1079 DRM_INFO("Detected VRAM RAM=%lluM, BAR=%lluM\n",
1080 adev->gmc.mc_vram_size >> 20,
1081 (unsigned long long)adev->gmc.aper_size >> 20);
1082 DRM_INFO("RAM width %dbits %s\n",
1083 adev->gmc.vram_width, amdgpu_vram_names[adev->gmc.vram_type]);
1084 return amdgpu_ttm_init(adev);
1085}
1086
1087/**
1088 * amdgpu_bo_fini - tear down memory manager
1089 * @adev: amdgpu device object
1090 *
1091 * Reverses amdgpu_bo_init() to tear down memory manager.
1092 */
1093void amdgpu_bo_fini(struct amdgpu_device *adev)
1094{
1095 int idx;
1096
1097 amdgpu_ttm_fini(adev);
1098
1099 if (drm_dev_enter(adev_to_drm(adev), &idx)) {
1100 if (!adev->gmc.xgmi.connected_to_cpu && !adev->gmc.is_app_apu) {
1101 arch_phys_wc_del(adev->gmc.vram_mtrr);
1102 arch_io_free_memtype_wc(adev->gmc.aper_base, adev->gmc.aper_size);
1103 }
1104 drm_dev_exit(idx);
1105 }
1106}
1107
1108/**
1109 * amdgpu_bo_set_tiling_flags - set tiling flags
1110 * @bo: &amdgpu_bo buffer object
1111 * @tiling_flags: new flags
1112 *
1113 * Sets buffer object's tiling flags with the new one. Used by GEM ioctl or
1114 * kernel driver to set the tiling flags on a buffer.
1115 *
1116 * Returns:
1117 * 0 for success or a negative error code on failure.
1118 */
1119int amdgpu_bo_set_tiling_flags(struct amdgpu_bo *bo, u64 tiling_flags)
1120{
1121 struct amdgpu_device *adev = amdgpu_ttm_adev(bo->tbo.bdev);
1122 struct amdgpu_bo_user *ubo;
1123
1124 BUG_ON(bo->tbo.type == ttm_bo_type_kernel);
1125 if (adev->family <= AMDGPU_FAMILY_CZ &&
1126 AMDGPU_TILING_GET(tiling_flags, TILE_SPLIT) > 6)
1127 return -EINVAL;
1128
1129 ubo = to_amdgpu_bo_user(bo);
1130 ubo->tiling_flags = tiling_flags;
1131 return 0;
1132}
1133
1134/**
1135 * amdgpu_bo_get_tiling_flags - get tiling flags
1136 * @bo: &amdgpu_bo buffer object
1137 * @tiling_flags: returned flags
1138 *
1139 * Gets buffer object's tiling flags. Used by GEM ioctl or kernel driver to
1140 * set the tiling flags on a buffer.
1141 */
1142void amdgpu_bo_get_tiling_flags(struct amdgpu_bo *bo, u64 *tiling_flags)
1143{
1144 struct amdgpu_bo_user *ubo;
1145
1146 BUG_ON(bo->tbo.type == ttm_bo_type_kernel);
1147 dma_resv_assert_held(bo->tbo.base.resv);
1148 ubo = to_amdgpu_bo_user(bo);
1149
1150 if (tiling_flags)
1151 *tiling_flags = ubo->tiling_flags;
1152}
1153
1154/**
1155 * amdgpu_bo_set_metadata - set metadata
1156 * @bo: &amdgpu_bo buffer object
1157 * @metadata: new metadata
1158 * @metadata_size: size of the new metadata
1159 * @flags: flags of the new metadata
1160 *
1161 * Sets buffer object's metadata, its size and flags.
1162 * Used via GEM ioctl.
1163 *
1164 * Returns:
1165 * 0 for success or a negative error code on failure.
1166 */
1167int amdgpu_bo_set_metadata(struct amdgpu_bo *bo, void *metadata,
1168 u32 metadata_size, uint64_t flags)
1169{
1170 struct amdgpu_bo_user *ubo;
1171 void *buffer;
1172
1173 BUG_ON(bo->tbo.type == ttm_bo_type_kernel);
1174 ubo = to_amdgpu_bo_user(bo);
1175 if (!metadata_size) {
1176 if (ubo->metadata_size) {
1177 kfree(ubo->metadata);
1178 ubo->metadata = NULL;
1179 ubo->metadata_size = 0;
1180 }
1181 return 0;
1182 }
1183
1184 if (metadata == NULL)
1185 return -EINVAL;
1186
1187 buffer = kmemdup(metadata, metadata_size, GFP_KERNEL);
1188 if (buffer == NULL)
1189 return -ENOMEM;
1190
1191 kfree(ubo->metadata);
1192 ubo->metadata_flags = flags;
1193 ubo->metadata = buffer;
1194 ubo->metadata_size = metadata_size;
1195
1196 return 0;
1197}
1198
1199/**
1200 * amdgpu_bo_get_metadata - get metadata
1201 * @bo: &amdgpu_bo buffer object
1202 * @buffer: returned metadata
1203 * @buffer_size: size of the buffer
1204 * @metadata_size: size of the returned metadata
1205 * @flags: flags of the returned metadata
1206 *
1207 * Gets buffer object's metadata, its size and flags. buffer_size shall not be
1208 * less than metadata_size.
1209 * Used via GEM ioctl.
1210 *
1211 * Returns:
1212 * 0 for success or a negative error code on failure.
1213 */
1214int amdgpu_bo_get_metadata(struct amdgpu_bo *bo, void *buffer,
1215 size_t buffer_size, uint32_t *metadata_size,
1216 uint64_t *flags)
1217{
1218 struct amdgpu_bo_user *ubo;
1219
1220 if (!buffer && !metadata_size)
1221 return -EINVAL;
1222
1223 BUG_ON(bo->tbo.type == ttm_bo_type_kernel);
1224 ubo = to_amdgpu_bo_user(bo);
1225 if (metadata_size)
1226 *metadata_size = ubo->metadata_size;
1227
1228 if (buffer) {
1229 if (buffer_size < ubo->metadata_size)
1230 return -EINVAL;
1231
1232 if (ubo->metadata_size)
1233 memcpy(buffer, ubo->metadata, ubo->metadata_size);
1234 }
1235
1236 if (flags)
1237 *flags = ubo->metadata_flags;
1238
1239 return 0;
1240}
1241
1242/**
1243 * amdgpu_bo_move_notify - notification about a memory move
1244 * @bo: pointer to a buffer object
1245 * @evict: if this move is evicting the buffer from the graphics address space
1246 * @new_mem: new resource for backing the BO
1247 *
1248 * Marks the corresponding &amdgpu_bo buffer object as invalid, also performs
1249 * bookkeeping.
1250 * TTM driver callback which is called when ttm moves a buffer.
1251 */
1252void amdgpu_bo_move_notify(struct ttm_buffer_object *bo,
1253 bool evict,
1254 struct ttm_resource *new_mem)
1255{
1256 struct amdgpu_device *adev = amdgpu_ttm_adev(bo->bdev);
1257 struct ttm_resource *old_mem = bo->resource;
1258 struct amdgpu_bo *abo;
1259
1260 if (!amdgpu_bo_is_amdgpu_bo(bo))
1261 return;
1262
1263 abo = ttm_to_amdgpu_bo(bo);
1264 amdgpu_vm_bo_invalidate(adev, abo, evict);
1265
1266 amdgpu_bo_kunmap(abo);
1267
1268 if (abo->tbo.base.dma_buf && !abo->tbo.base.import_attach &&
1269 old_mem && old_mem->mem_type != TTM_PL_SYSTEM)
1270 dma_buf_move_notify(abo->tbo.base.dma_buf);
1271
1272 /* move_notify is called before move happens */
1273 trace_amdgpu_bo_move(abo, new_mem ? new_mem->mem_type : -1,
1274 old_mem ? old_mem->mem_type : -1);
1275}
1276
1277void amdgpu_bo_get_memory(struct amdgpu_bo *bo,
1278 struct amdgpu_mem_stats *stats)
1279{
1280 struct amdgpu_device *adev = amdgpu_ttm_adev(bo->tbo.bdev);
1281 struct ttm_resource *res = bo->tbo.resource;
1282 uint64_t size = amdgpu_bo_size(bo);
1283 struct drm_gem_object *obj;
1284 unsigned int domain;
1285 bool shared;
1286
1287 /* Abort if the BO doesn't currently have a backing store */
1288 if (!res)
1289 return;
1290
1291 obj = &bo->tbo.base;
1292 shared = drm_gem_object_is_shared_for_memory_stats(obj);
1293
1294 domain = amdgpu_mem_type_to_domain(res->mem_type);
1295 switch (domain) {
1296 case AMDGPU_GEM_DOMAIN_VRAM:
1297 stats->vram += size;
1298 if (amdgpu_res_cpu_visible(adev, bo->tbo.resource))
1299 stats->visible_vram += size;
1300 if (shared)
1301 stats->vram_shared += size;
1302 break;
1303 case AMDGPU_GEM_DOMAIN_GTT:
1304 stats->gtt += size;
1305 if (shared)
1306 stats->gtt_shared += size;
1307 break;
1308 case AMDGPU_GEM_DOMAIN_CPU:
1309 default:
1310 stats->cpu += size;
1311 if (shared)
1312 stats->cpu_shared += size;
1313 break;
1314 }
1315
1316 if (bo->preferred_domains & AMDGPU_GEM_DOMAIN_VRAM) {
1317 stats->requested_vram += size;
1318 if (bo->flags & AMDGPU_GEM_CREATE_CPU_ACCESS_REQUIRED)
1319 stats->requested_visible_vram += size;
1320
1321 if (domain != AMDGPU_GEM_DOMAIN_VRAM) {
1322 stats->evicted_vram += size;
1323 if (bo->flags & AMDGPU_GEM_CREATE_CPU_ACCESS_REQUIRED)
1324 stats->evicted_visible_vram += size;
1325 }
1326 } else if (bo->preferred_domains & AMDGPU_GEM_DOMAIN_GTT) {
1327 stats->requested_gtt += size;
1328 }
1329}
1330
1331/**
1332 * amdgpu_bo_release_notify - notification about a BO being released
1333 * @bo: pointer to a buffer object
1334 *
1335 * Wipes VRAM buffers whose contents should not be leaked before the
1336 * memory is released.
1337 */
1338void amdgpu_bo_release_notify(struct ttm_buffer_object *bo)
1339{
1340 struct amdgpu_device *adev = amdgpu_ttm_adev(bo->bdev);
1341 struct dma_fence *fence = NULL;
1342 struct amdgpu_bo *abo;
1343 int r;
1344
1345 if (!amdgpu_bo_is_amdgpu_bo(bo))
1346 return;
1347
1348 abo = ttm_to_amdgpu_bo(bo);
1349
1350 WARN_ON(abo->vm_bo);
1351
1352 if (abo->kfd_bo)
1353 amdgpu_amdkfd_release_notify(abo);
1354
1355 /* We only remove the fence if the resv has individualized. */
1356 WARN_ON_ONCE(bo->type == ttm_bo_type_kernel
1357 && bo->base.resv != &bo->base._resv);
1358 if (bo->base.resv == &bo->base._resv)
1359 amdgpu_amdkfd_remove_fence_on_pt_pd_bos(abo);
1360
1361 if (!bo->resource || bo->resource->mem_type != TTM_PL_VRAM ||
1362 !(abo->flags & AMDGPU_GEM_CREATE_VRAM_WIPE_ON_RELEASE) ||
1363 adev->in_suspend || drm_dev_is_unplugged(adev_to_drm(adev)))
1364 return;
1365
1366 if (WARN_ON_ONCE(!dma_resv_trylock(bo->base.resv)))
1367 return;
1368
1369 r = amdgpu_fill_buffer(abo, AMDGPU_POISON, bo->base.resv, &fence, true);
1370 if (!WARN_ON(r)) {
1371 amdgpu_bo_fence(abo, fence, false);
1372 dma_fence_put(fence);
1373 }
1374
1375 dma_resv_unlock(bo->base.resv);
1376}
1377
1378/**
1379 * amdgpu_bo_fault_reserve_notify - notification about a memory fault
1380 * @bo: pointer to a buffer object
1381 *
1382 * Notifies the driver we are taking a fault on this BO and have reserved it,
1383 * also performs bookkeeping.
1384 * TTM driver callback for dealing with vm faults.
1385 *
1386 * Returns:
1387 * 0 for success or a negative error code on failure.
1388 */
1389vm_fault_t amdgpu_bo_fault_reserve_notify(struct ttm_buffer_object *bo)
1390{
1391 struct amdgpu_device *adev = amdgpu_ttm_adev(bo->bdev);
1392 struct ttm_operation_ctx ctx = { false, false };
1393 struct amdgpu_bo *abo = ttm_to_amdgpu_bo(bo);
1394 int r;
1395
1396 /* Remember that this BO was accessed by the CPU */
1397 abo->flags |= AMDGPU_GEM_CREATE_CPU_ACCESS_REQUIRED;
1398
1399 if (amdgpu_res_cpu_visible(adev, bo->resource))
1400 return 0;
1401
1402 /* Can't move a pinned BO to visible VRAM */
1403 if (abo->tbo.pin_count > 0)
1404 return VM_FAULT_SIGBUS;
1405
1406 /* hurrah the memory is not visible ! */
1407 atomic64_inc(&adev->num_vram_cpu_page_faults);
1408 amdgpu_bo_placement_from_domain(abo, AMDGPU_GEM_DOMAIN_VRAM |
1409 AMDGPU_GEM_DOMAIN_GTT);
1410
1411 /* Avoid costly evictions; only set GTT as a busy placement */
1412 abo->placements[0].flags |= TTM_PL_FLAG_DESIRED;
1413
1414 r = ttm_bo_validate(bo, &abo->placement, &ctx);
1415 if (unlikely(r == -EBUSY || r == -ERESTARTSYS))
1416 return VM_FAULT_NOPAGE;
1417 else if (unlikely(r))
1418 return VM_FAULT_SIGBUS;
1419
1420 /* this should never happen */
1421 if (bo->resource->mem_type == TTM_PL_VRAM &&
1422 !amdgpu_res_cpu_visible(adev, bo->resource))
1423 return VM_FAULT_SIGBUS;
1424
1425 ttm_bo_move_to_lru_tail_unlocked(bo);
1426 return 0;
1427}
1428
1429/**
1430 * amdgpu_bo_fence - add fence to buffer object
1431 *
1432 * @bo: buffer object in question
1433 * @fence: fence to add
1434 * @shared: true if fence should be added shared
1435 *
1436 */
1437void amdgpu_bo_fence(struct amdgpu_bo *bo, struct dma_fence *fence,
1438 bool shared)
1439{
1440 struct dma_resv *resv = bo->tbo.base.resv;
1441 int r;
1442
1443 r = dma_resv_reserve_fences(resv, 1);
1444 if (r) {
1445 /* As last resort on OOM we block for the fence */
1446 dma_fence_wait(fence, false);
1447 return;
1448 }
1449
1450 dma_resv_add_fence(resv, fence, shared ? DMA_RESV_USAGE_READ :
1451 DMA_RESV_USAGE_WRITE);
1452}
1453
1454/**
1455 * amdgpu_bo_sync_wait_resv - Wait for BO reservation fences
1456 *
1457 * @adev: amdgpu device pointer
1458 * @resv: reservation object to sync to
1459 * @sync_mode: synchronization mode
1460 * @owner: fence owner
1461 * @intr: Whether the wait is interruptible
1462 *
1463 * Extract the fences from the reservation object and waits for them to finish.
1464 *
1465 * Returns:
1466 * 0 on success, errno otherwise.
1467 */
1468int amdgpu_bo_sync_wait_resv(struct amdgpu_device *adev, struct dma_resv *resv,
1469 enum amdgpu_sync_mode sync_mode, void *owner,
1470 bool intr)
1471{
1472 struct amdgpu_sync sync;
1473 int r;
1474
1475 amdgpu_sync_create(&sync);
1476 amdgpu_sync_resv(adev, &sync, resv, sync_mode, owner);
1477 r = amdgpu_sync_wait(&sync, intr);
1478 amdgpu_sync_free(&sync);
1479 return r;
1480}
1481
1482/**
1483 * amdgpu_bo_sync_wait - Wrapper for amdgpu_bo_sync_wait_resv
1484 * @bo: buffer object to wait for
1485 * @owner: fence owner
1486 * @intr: Whether the wait is interruptible
1487 *
1488 * Wrapper to wait for fences in a BO.
1489 * Returns:
1490 * 0 on success, errno otherwise.
1491 */
1492int amdgpu_bo_sync_wait(struct amdgpu_bo *bo, void *owner, bool intr)
1493{
1494 struct amdgpu_device *adev = amdgpu_ttm_adev(bo->tbo.bdev);
1495
1496 return amdgpu_bo_sync_wait_resv(adev, bo->tbo.base.resv,
1497 AMDGPU_SYNC_NE_OWNER, owner, intr);
1498}
1499
1500/**
1501 * amdgpu_bo_gpu_offset - return GPU offset of bo
1502 * @bo: amdgpu object for which we query the offset
1503 *
1504 * Note: object should either be pinned or reserved when calling this
1505 * function, it might be useful to add check for this for debugging.
1506 *
1507 * Returns:
1508 * current GPU offset of the object.
1509 */
1510u64 amdgpu_bo_gpu_offset(struct amdgpu_bo *bo)
1511{
1512 WARN_ON_ONCE(bo->tbo.resource->mem_type == TTM_PL_SYSTEM);
1513 WARN_ON_ONCE(!dma_resv_is_locked(bo->tbo.base.resv) &&
1514 !bo->tbo.pin_count && bo->tbo.type != ttm_bo_type_kernel);
1515 WARN_ON_ONCE(bo->tbo.resource->start == AMDGPU_BO_INVALID_OFFSET);
1516 WARN_ON_ONCE(bo->tbo.resource->mem_type == TTM_PL_VRAM &&
1517 !(bo->flags & AMDGPU_GEM_CREATE_VRAM_CONTIGUOUS));
1518
1519 return amdgpu_bo_gpu_offset_no_check(bo);
1520}
1521
1522/**
1523 * amdgpu_bo_gpu_offset_no_check - return GPU offset of bo
1524 * @bo: amdgpu object for which we query the offset
1525 *
1526 * Returns:
1527 * current GPU offset of the object without raising warnings.
1528 */
1529u64 amdgpu_bo_gpu_offset_no_check(struct amdgpu_bo *bo)
1530{
1531 struct amdgpu_device *adev = amdgpu_ttm_adev(bo->tbo.bdev);
1532 uint64_t offset = AMDGPU_BO_INVALID_OFFSET;
1533
1534 if (bo->tbo.resource->mem_type == TTM_PL_TT)
1535 offset = amdgpu_gmc_agp_addr(&bo->tbo);
1536
1537 if (offset == AMDGPU_BO_INVALID_OFFSET)
1538 offset = (bo->tbo.resource->start << PAGE_SHIFT) +
1539 amdgpu_ttm_domain_start(adev, bo->tbo.resource->mem_type);
1540
1541 return amdgpu_gmc_sign_extend(offset);
1542}
1543
1544/**
1545 * amdgpu_bo_get_preferred_domain - get preferred domain
1546 * @adev: amdgpu device object
1547 * @domain: allowed :ref:`memory domains <amdgpu_memory_domains>`
1548 *
1549 * Returns:
1550 * Which of the allowed domains is preferred for allocating the BO.
1551 */
1552uint32_t amdgpu_bo_get_preferred_domain(struct amdgpu_device *adev,
1553 uint32_t domain)
1554{
1555 if ((domain == (AMDGPU_GEM_DOMAIN_VRAM | AMDGPU_GEM_DOMAIN_GTT)) &&
1556 ((adev->asic_type == CHIP_CARRIZO) || (adev->asic_type == CHIP_STONEY))) {
1557 domain = AMDGPU_GEM_DOMAIN_VRAM;
1558 if (adev->gmc.real_vram_size <= AMDGPU_SG_THRESHOLD)
1559 domain = AMDGPU_GEM_DOMAIN_GTT;
1560 }
1561 return domain;
1562}
1563
1564#if defined(CONFIG_DEBUG_FS)
1565#define amdgpu_bo_print_flag(m, bo, flag) \
1566 do { \
1567 if (bo->flags & (AMDGPU_GEM_CREATE_ ## flag)) { \
1568 seq_printf((m), " " #flag); \
1569 } \
1570 } while (0)
1571
1572/**
1573 * amdgpu_bo_print_info - print BO info in debugfs file
1574 *
1575 * @id: Index or Id of the BO
1576 * @bo: Requested BO for printing info
1577 * @m: debugfs file
1578 *
1579 * Print BO information in debugfs file
1580 *
1581 * Returns:
1582 * Size of the BO in bytes.
1583 */
1584u64 amdgpu_bo_print_info(int id, struct amdgpu_bo *bo, struct seq_file *m)
1585{
1586 struct amdgpu_device *adev = amdgpu_ttm_adev(bo->tbo.bdev);
1587 struct dma_buf_attachment *attachment;
1588 struct dma_buf *dma_buf;
1589 const char *placement;
1590 unsigned int pin_count;
1591 u64 size;
1592
1593 if (dma_resv_trylock(bo->tbo.base.resv)) {
1594 unsigned int domain;
1595
1596 domain = amdgpu_mem_type_to_domain(bo->tbo.resource->mem_type);
1597 switch (domain) {
1598 case AMDGPU_GEM_DOMAIN_VRAM:
1599 if (amdgpu_res_cpu_visible(adev, bo->tbo.resource))
1600 placement = "VRAM VISIBLE";
1601 else
1602 placement = "VRAM";
1603 break;
1604 case AMDGPU_GEM_DOMAIN_GTT:
1605 placement = "GTT";
1606 break;
1607 case AMDGPU_GEM_DOMAIN_CPU:
1608 default:
1609 placement = "CPU";
1610 break;
1611 }
1612 dma_resv_unlock(bo->tbo.base.resv);
1613 } else {
1614 placement = "UNKNOWN";
1615 }
1616
1617 size = amdgpu_bo_size(bo);
1618 seq_printf(m, "\t\t0x%08x: %12lld byte %s",
1619 id, size, placement);
1620
1621 pin_count = READ_ONCE(bo->tbo.pin_count);
1622 if (pin_count)
1623 seq_printf(m, " pin count %d", pin_count);
1624
1625 dma_buf = READ_ONCE(bo->tbo.base.dma_buf);
1626 attachment = READ_ONCE(bo->tbo.base.import_attach);
1627
1628 if (attachment)
1629 seq_printf(m, " imported from ino:%lu", file_inode(dma_buf->file)->i_ino);
1630 else if (dma_buf)
1631 seq_printf(m, " exported as ino:%lu", file_inode(dma_buf->file)->i_ino);
1632
1633 amdgpu_bo_print_flag(m, bo, CPU_ACCESS_REQUIRED);
1634 amdgpu_bo_print_flag(m, bo, NO_CPU_ACCESS);
1635 amdgpu_bo_print_flag(m, bo, CPU_GTT_USWC);
1636 amdgpu_bo_print_flag(m, bo, VRAM_CLEARED);
1637 amdgpu_bo_print_flag(m, bo, VRAM_CONTIGUOUS);
1638 amdgpu_bo_print_flag(m, bo, VM_ALWAYS_VALID);
1639 amdgpu_bo_print_flag(m, bo, EXPLICIT_SYNC);
1640
1641 seq_puts(m, "\n");
1642
1643 return size;
1644}
1645#endif
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 <drm/amdgpu_drm.h>
36#include <drm/drm_cache.h>
37#include "amdgpu.h"
38#include "amdgpu_trace.h"
39
40
41
42static u64 amdgpu_get_vis_part_size(struct amdgpu_device *adev,
43 struct ttm_mem_reg *mem)
44{
45 if (mem->start << PAGE_SHIFT >= adev->mc.visible_vram_size)
46 return 0;
47
48 return ((mem->start << PAGE_SHIFT) + mem->size) >
49 adev->mc.visible_vram_size ?
50 adev->mc.visible_vram_size - (mem->start << PAGE_SHIFT) :
51 mem->size;
52}
53
54static void amdgpu_update_memory_usage(struct amdgpu_device *adev,
55 struct ttm_mem_reg *old_mem,
56 struct ttm_mem_reg *new_mem)
57{
58 u64 vis_size;
59 if (!adev)
60 return;
61
62 if (new_mem) {
63 switch (new_mem->mem_type) {
64 case TTM_PL_TT:
65 atomic64_add(new_mem->size, &adev->gtt_usage);
66 break;
67 case TTM_PL_VRAM:
68 atomic64_add(new_mem->size, &adev->vram_usage);
69 vis_size = amdgpu_get_vis_part_size(adev, new_mem);
70 atomic64_add(vis_size, &adev->vram_vis_usage);
71 break;
72 }
73 }
74
75 if (old_mem) {
76 switch (old_mem->mem_type) {
77 case TTM_PL_TT:
78 atomic64_sub(old_mem->size, &adev->gtt_usage);
79 break;
80 case TTM_PL_VRAM:
81 atomic64_sub(old_mem->size, &adev->vram_usage);
82 vis_size = amdgpu_get_vis_part_size(adev, old_mem);
83 atomic64_sub(vis_size, &adev->vram_vis_usage);
84 break;
85 }
86 }
87}
88
89static void amdgpu_ttm_bo_destroy(struct ttm_buffer_object *tbo)
90{
91 struct amdgpu_device *adev = amdgpu_ttm_adev(tbo->bdev);
92 struct amdgpu_bo *bo;
93
94 bo = container_of(tbo, struct amdgpu_bo, tbo);
95
96 amdgpu_update_memory_usage(adev, &bo->tbo.mem, NULL);
97
98 drm_gem_object_release(&bo->gem_base);
99 amdgpu_bo_unref(&bo->parent);
100 if (!list_empty(&bo->shadow_list)) {
101 mutex_lock(&adev->shadow_list_lock);
102 list_del_init(&bo->shadow_list);
103 mutex_unlock(&adev->shadow_list_lock);
104 }
105 kfree(bo->metadata);
106 kfree(bo);
107}
108
109bool amdgpu_ttm_bo_is_amdgpu_bo(struct ttm_buffer_object *bo)
110{
111 if (bo->destroy == &amdgpu_ttm_bo_destroy)
112 return true;
113 return false;
114}
115
116static void amdgpu_ttm_placement_init(struct amdgpu_device *adev,
117 struct ttm_placement *placement,
118 struct ttm_place *places,
119 u32 domain, u64 flags)
120{
121 u32 c = 0;
122
123 if (domain & AMDGPU_GEM_DOMAIN_VRAM) {
124 unsigned visible_pfn = adev->mc.visible_vram_size >> PAGE_SHIFT;
125 unsigned lpfn = 0;
126
127 /* This forces a reallocation if the flag wasn't set before */
128 if (flags & AMDGPU_GEM_CREATE_VRAM_CONTIGUOUS)
129 lpfn = adev->mc.real_vram_size >> PAGE_SHIFT;
130
131 places[c].fpfn = 0;
132 places[c].lpfn = lpfn;
133 places[c].flags = TTM_PL_FLAG_WC | TTM_PL_FLAG_UNCACHED |
134 TTM_PL_FLAG_VRAM;
135 if (flags & AMDGPU_GEM_CREATE_CPU_ACCESS_REQUIRED)
136 places[c].lpfn = visible_pfn;
137 else
138 places[c].flags |= TTM_PL_FLAG_TOPDOWN;
139 c++;
140 }
141
142 if (domain & AMDGPU_GEM_DOMAIN_GTT) {
143 places[c].fpfn = 0;
144 places[c].lpfn = 0;
145 places[c].flags = TTM_PL_FLAG_TT;
146 if (flags & AMDGPU_GEM_CREATE_CPU_GTT_USWC)
147 places[c].flags |= TTM_PL_FLAG_WC |
148 TTM_PL_FLAG_UNCACHED;
149 else
150 places[c].flags |= TTM_PL_FLAG_CACHED;
151 c++;
152 }
153
154 if (domain & AMDGPU_GEM_DOMAIN_CPU) {
155 places[c].fpfn = 0;
156 places[c].lpfn = 0;
157 places[c].flags = TTM_PL_FLAG_SYSTEM;
158 if (flags & AMDGPU_GEM_CREATE_CPU_GTT_USWC)
159 places[c].flags |= TTM_PL_FLAG_WC |
160 TTM_PL_FLAG_UNCACHED;
161 else
162 places[c].flags |= TTM_PL_FLAG_CACHED;
163 c++;
164 }
165
166 if (domain & AMDGPU_GEM_DOMAIN_GDS) {
167 places[c].fpfn = 0;
168 places[c].lpfn = 0;
169 places[c].flags = TTM_PL_FLAG_UNCACHED | AMDGPU_PL_FLAG_GDS;
170 c++;
171 }
172
173 if (domain & AMDGPU_GEM_DOMAIN_GWS) {
174 places[c].fpfn = 0;
175 places[c].lpfn = 0;
176 places[c].flags = TTM_PL_FLAG_UNCACHED | AMDGPU_PL_FLAG_GWS;
177 c++;
178 }
179
180 if (domain & AMDGPU_GEM_DOMAIN_OA) {
181 places[c].fpfn = 0;
182 places[c].lpfn = 0;
183 places[c].flags = TTM_PL_FLAG_UNCACHED | AMDGPU_PL_FLAG_OA;
184 c++;
185 }
186
187 if (!c) {
188 places[c].fpfn = 0;
189 places[c].lpfn = 0;
190 places[c].flags = TTM_PL_MASK_CACHING | TTM_PL_FLAG_SYSTEM;
191 c++;
192 }
193
194 placement->num_placement = c;
195 placement->placement = places;
196
197 placement->num_busy_placement = c;
198 placement->busy_placement = places;
199}
200
201void amdgpu_ttm_placement_from_domain(struct amdgpu_bo *abo, u32 domain)
202{
203 struct amdgpu_device *adev = amdgpu_ttm_adev(abo->tbo.bdev);
204
205 amdgpu_ttm_placement_init(adev, &abo->placement, abo->placements,
206 domain, abo->flags);
207}
208
209static void amdgpu_fill_placement_to_bo(struct amdgpu_bo *bo,
210 struct ttm_placement *placement)
211{
212 BUG_ON(placement->num_placement > (AMDGPU_GEM_DOMAIN_MAX + 1));
213
214 memcpy(bo->placements, placement->placement,
215 placement->num_placement * sizeof(struct ttm_place));
216 bo->placement.num_placement = placement->num_placement;
217 bo->placement.num_busy_placement = placement->num_busy_placement;
218 bo->placement.placement = bo->placements;
219 bo->placement.busy_placement = bo->placements;
220}
221
222/**
223 * amdgpu_bo_create_kernel - create BO for kernel use
224 *
225 * @adev: amdgpu device object
226 * @size: size for the new BO
227 * @align: alignment for the new BO
228 * @domain: where to place it
229 * @bo_ptr: resulting BO
230 * @gpu_addr: GPU addr of the pinned BO
231 * @cpu_addr: optional CPU address mapping
232 *
233 * Allocates and pins a BO for kernel internal use.
234 *
235 * Returns 0 on success, negative error code otherwise.
236 */
237int amdgpu_bo_create_kernel(struct amdgpu_device *adev,
238 unsigned long size, int align,
239 u32 domain, struct amdgpu_bo **bo_ptr,
240 u64 *gpu_addr, void **cpu_addr)
241{
242 int r;
243
244 r = amdgpu_bo_create(adev, size, align, true, domain,
245 AMDGPU_GEM_CREATE_CPU_ACCESS_REQUIRED |
246 AMDGPU_GEM_CREATE_VRAM_CONTIGUOUS,
247 NULL, NULL, bo_ptr);
248 if (r) {
249 dev_err(adev->dev, "(%d) failed to allocate kernel bo\n", r);
250 return r;
251 }
252
253 r = amdgpu_bo_reserve(*bo_ptr, false);
254 if (r) {
255 dev_err(adev->dev, "(%d) failed to reserve kernel bo\n", r);
256 goto error_free;
257 }
258
259 r = amdgpu_bo_pin(*bo_ptr, domain, gpu_addr);
260 if (r) {
261 dev_err(adev->dev, "(%d) kernel bo pin failed\n", r);
262 goto error_unreserve;
263 }
264
265 if (cpu_addr) {
266 r = amdgpu_bo_kmap(*bo_ptr, cpu_addr);
267 if (r) {
268 dev_err(adev->dev, "(%d) kernel bo map failed\n", r);
269 goto error_unreserve;
270 }
271 }
272
273 amdgpu_bo_unreserve(*bo_ptr);
274
275 return 0;
276
277error_unreserve:
278 amdgpu_bo_unreserve(*bo_ptr);
279
280error_free:
281 amdgpu_bo_unref(bo_ptr);
282
283 return r;
284}
285
286/**
287 * amdgpu_bo_free_kernel - free BO for kernel use
288 *
289 * @bo: amdgpu BO to free
290 *
291 * unmaps and unpin a BO for kernel internal use.
292 */
293void amdgpu_bo_free_kernel(struct amdgpu_bo **bo, u64 *gpu_addr,
294 void **cpu_addr)
295{
296 if (*bo == NULL)
297 return;
298
299 if (likely(amdgpu_bo_reserve(*bo, false) == 0)) {
300 if (cpu_addr)
301 amdgpu_bo_kunmap(*bo);
302
303 amdgpu_bo_unpin(*bo);
304 amdgpu_bo_unreserve(*bo);
305 }
306 amdgpu_bo_unref(bo);
307
308 if (gpu_addr)
309 *gpu_addr = 0;
310
311 if (cpu_addr)
312 *cpu_addr = NULL;
313}
314
315int amdgpu_bo_create_restricted(struct amdgpu_device *adev,
316 unsigned long size, int byte_align,
317 bool kernel, u32 domain, u64 flags,
318 struct sg_table *sg,
319 struct ttm_placement *placement,
320 struct reservation_object *resv,
321 struct amdgpu_bo **bo_ptr)
322{
323 struct amdgpu_bo *bo;
324 enum ttm_bo_type type;
325 unsigned long page_align;
326 size_t acc_size;
327 int r;
328
329 page_align = roundup(byte_align, PAGE_SIZE) >> PAGE_SHIFT;
330 size = ALIGN(size, PAGE_SIZE);
331
332 if (kernel) {
333 type = ttm_bo_type_kernel;
334 } else if (sg) {
335 type = ttm_bo_type_sg;
336 } else {
337 type = ttm_bo_type_device;
338 }
339 *bo_ptr = NULL;
340
341 acc_size = ttm_bo_dma_acc_size(&adev->mman.bdev, size,
342 sizeof(struct amdgpu_bo));
343
344 bo = kzalloc(sizeof(struct amdgpu_bo), GFP_KERNEL);
345 if (bo == NULL)
346 return -ENOMEM;
347 r = drm_gem_object_init(adev->ddev, &bo->gem_base, size);
348 if (unlikely(r)) {
349 kfree(bo);
350 return r;
351 }
352 INIT_LIST_HEAD(&bo->shadow_list);
353 INIT_LIST_HEAD(&bo->va);
354 bo->prefered_domains = domain & (AMDGPU_GEM_DOMAIN_VRAM |
355 AMDGPU_GEM_DOMAIN_GTT |
356 AMDGPU_GEM_DOMAIN_CPU |
357 AMDGPU_GEM_DOMAIN_GDS |
358 AMDGPU_GEM_DOMAIN_GWS |
359 AMDGPU_GEM_DOMAIN_OA);
360 bo->allowed_domains = bo->prefered_domains;
361 if (!kernel && bo->allowed_domains == AMDGPU_GEM_DOMAIN_VRAM)
362 bo->allowed_domains |= AMDGPU_GEM_DOMAIN_GTT;
363
364 bo->flags = flags;
365
366 /* For architectures that don't support WC memory,
367 * mask out the WC flag from the BO
368 */
369 if (!drm_arch_can_wc_memory())
370 bo->flags &= ~AMDGPU_GEM_CREATE_CPU_GTT_USWC;
371
372 amdgpu_fill_placement_to_bo(bo, placement);
373 /* Kernel allocation are uninterruptible */
374
375 if (!resv) {
376 bool locked;
377
378 reservation_object_init(&bo->tbo.ttm_resv);
379 locked = ww_mutex_trylock(&bo->tbo.ttm_resv.lock);
380 WARN_ON(!locked);
381 }
382 r = ttm_bo_init(&adev->mman.bdev, &bo->tbo, size, type,
383 &bo->placement, page_align, !kernel, NULL,
384 acc_size, sg, resv ? resv : &bo->tbo.ttm_resv,
385 &amdgpu_ttm_bo_destroy);
386 if (unlikely(r != 0))
387 return r;
388
389 if (flags & AMDGPU_GEM_CREATE_VRAM_CLEARED &&
390 bo->tbo.mem.placement & TTM_PL_FLAG_VRAM) {
391 struct dma_fence *fence;
392
393 r = amdgpu_fill_buffer(bo, 0, bo->tbo.resv, &fence);
394 if (unlikely(r))
395 goto fail_unreserve;
396
397 amdgpu_bo_fence(bo, fence, false);
398 dma_fence_put(bo->tbo.moving);
399 bo->tbo.moving = dma_fence_get(fence);
400 dma_fence_put(fence);
401 }
402 if (!resv)
403 ww_mutex_unlock(&bo->tbo.resv->lock);
404 *bo_ptr = bo;
405
406 trace_amdgpu_bo_create(bo);
407
408 return 0;
409
410fail_unreserve:
411 ww_mutex_unlock(&bo->tbo.resv->lock);
412 amdgpu_bo_unref(&bo);
413 return r;
414}
415
416static int amdgpu_bo_create_shadow(struct amdgpu_device *adev,
417 unsigned long size, int byte_align,
418 struct amdgpu_bo *bo)
419{
420 struct ttm_placement placement = {0};
421 struct ttm_place placements[AMDGPU_GEM_DOMAIN_MAX + 1];
422 int r;
423
424 if (bo->shadow)
425 return 0;
426
427 bo->flags |= AMDGPU_GEM_CREATE_SHADOW;
428 memset(&placements, 0,
429 (AMDGPU_GEM_DOMAIN_MAX + 1) * sizeof(struct ttm_place));
430
431 amdgpu_ttm_placement_init(adev, &placement,
432 placements, AMDGPU_GEM_DOMAIN_GTT,
433 AMDGPU_GEM_CREATE_CPU_GTT_USWC);
434
435 r = amdgpu_bo_create_restricted(adev, size, byte_align, true,
436 AMDGPU_GEM_DOMAIN_GTT,
437 AMDGPU_GEM_CREATE_CPU_GTT_USWC,
438 NULL, &placement,
439 bo->tbo.resv,
440 &bo->shadow);
441 if (!r) {
442 bo->shadow->parent = amdgpu_bo_ref(bo);
443 mutex_lock(&adev->shadow_list_lock);
444 list_add_tail(&bo->shadow_list, &adev->shadow_list);
445 mutex_unlock(&adev->shadow_list_lock);
446 }
447
448 return r;
449}
450
451int amdgpu_bo_create(struct amdgpu_device *adev,
452 unsigned long size, int byte_align,
453 bool kernel, u32 domain, u64 flags,
454 struct sg_table *sg,
455 struct reservation_object *resv,
456 struct amdgpu_bo **bo_ptr)
457{
458 struct ttm_placement placement = {0};
459 struct ttm_place placements[AMDGPU_GEM_DOMAIN_MAX + 1];
460 int r;
461
462 memset(&placements, 0,
463 (AMDGPU_GEM_DOMAIN_MAX + 1) * sizeof(struct ttm_place));
464
465 amdgpu_ttm_placement_init(adev, &placement,
466 placements, domain, flags);
467
468 r = amdgpu_bo_create_restricted(adev, size, byte_align, kernel,
469 domain, flags, sg, &placement,
470 resv, bo_ptr);
471 if (r)
472 return r;
473
474 if (amdgpu_need_backup(adev) && (flags & AMDGPU_GEM_CREATE_SHADOW)) {
475 r = amdgpu_bo_create_shadow(adev, size, byte_align, (*bo_ptr));
476 if (r)
477 amdgpu_bo_unref(bo_ptr);
478 }
479
480 return r;
481}
482
483int amdgpu_bo_backup_to_shadow(struct amdgpu_device *adev,
484 struct amdgpu_ring *ring,
485 struct amdgpu_bo *bo,
486 struct reservation_object *resv,
487 struct dma_fence **fence,
488 bool direct)
489
490{
491 struct amdgpu_bo *shadow = bo->shadow;
492 uint64_t bo_addr, shadow_addr;
493 int r;
494
495 if (!shadow)
496 return -EINVAL;
497
498 bo_addr = amdgpu_bo_gpu_offset(bo);
499 shadow_addr = amdgpu_bo_gpu_offset(bo->shadow);
500
501 r = reservation_object_reserve_shared(bo->tbo.resv);
502 if (r)
503 goto err;
504
505 r = amdgpu_copy_buffer(ring, bo_addr, shadow_addr,
506 amdgpu_bo_size(bo), resv, fence,
507 direct);
508 if (!r)
509 amdgpu_bo_fence(bo, *fence, true);
510
511err:
512 return r;
513}
514
515int amdgpu_bo_restore_from_shadow(struct amdgpu_device *adev,
516 struct amdgpu_ring *ring,
517 struct amdgpu_bo *bo,
518 struct reservation_object *resv,
519 struct dma_fence **fence,
520 bool direct)
521
522{
523 struct amdgpu_bo *shadow = bo->shadow;
524 uint64_t bo_addr, shadow_addr;
525 int r;
526
527 if (!shadow)
528 return -EINVAL;
529
530 bo_addr = amdgpu_bo_gpu_offset(bo);
531 shadow_addr = amdgpu_bo_gpu_offset(bo->shadow);
532
533 r = reservation_object_reserve_shared(bo->tbo.resv);
534 if (r)
535 goto err;
536
537 r = amdgpu_copy_buffer(ring, shadow_addr, bo_addr,
538 amdgpu_bo_size(bo), resv, fence,
539 direct);
540 if (!r)
541 amdgpu_bo_fence(bo, *fence, true);
542
543err:
544 return r;
545}
546
547int amdgpu_bo_kmap(struct amdgpu_bo *bo, void **ptr)
548{
549 bool is_iomem;
550 long r;
551
552 if (bo->flags & AMDGPU_GEM_CREATE_NO_CPU_ACCESS)
553 return -EPERM;
554
555 if (bo->kptr) {
556 if (ptr) {
557 *ptr = bo->kptr;
558 }
559 return 0;
560 }
561
562 r = reservation_object_wait_timeout_rcu(bo->tbo.resv, false, false,
563 MAX_SCHEDULE_TIMEOUT);
564 if (r < 0)
565 return r;
566
567 r = ttm_bo_kmap(&bo->tbo, 0, bo->tbo.num_pages, &bo->kmap);
568 if (r)
569 return r;
570
571 bo->kptr = ttm_kmap_obj_virtual(&bo->kmap, &is_iomem);
572 if (ptr)
573 *ptr = bo->kptr;
574
575 return 0;
576}
577
578void amdgpu_bo_kunmap(struct amdgpu_bo *bo)
579{
580 if (bo->kptr == NULL)
581 return;
582 bo->kptr = NULL;
583 ttm_bo_kunmap(&bo->kmap);
584}
585
586struct amdgpu_bo *amdgpu_bo_ref(struct amdgpu_bo *bo)
587{
588 if (bo == NULL)
589 return NULL;
590
591 ttm_bo_reference(&bo->tbo);
592 return bo;
593}
594
595void amdgpu_bo_unref(struct amdgpu_bo **bo)
596{
597 struct ttm_buffer_object *tbo;
598
599 if ((*bo) == NULL)
600 return;
601
602 tbo = &((*bo)->tbo);
603 ttm_bo_unref(&tbo);
604 if (tbo == NULL)
605 *bo = NULL;
606}
607
608int amdgpu_bo_pin_restricted(struct amdgpu_bo *bo, u32 domain,
609 u64 min_offset, u64 max_offset,
610 u64 *gpu_addr)
611{
612 struct amdgpu_device *adev = amdgpu_ttm_adev(bo->tbo.bdev);
613 int r, i;
614 unsigned fpfn, lpfn;
615
616 if (amdgpu_ttm_tt_get_usermm(bo->tbo.ttm))
617 return -EPERM;
618
619 if (WARN_ON_ONCE(min_offset > max_offset))
620 return -EINVAL;
621
622 if (bo->pin_count) {
623 uint32_t mem_type = bo->tbo.mem.mem_type;
624
625 if (domain != amdgpu_mem_type_to_domain(mem_type))
626 return -EINVAL;
627
628 bo->pin_count++;
629 if (gpu_addr)
630 *gpu_addr = amdgpu_bo_gpu_offset(bo);
631
632 if (max_offset != 0) {
633 u64 domain_start = bo->tbo.bdev->man[mem_type].gpu_offset;
634 WARN_ON_ONCE(max_offset <
635 (amdgpu_bo_gpu_offset(bo) - domain_start));
636 }
637
638 return 0;
639 }
640
641 bo->flags |= AMDGPU_GEM_CREATE_VRAM_CONTIGUOUS;
642 amdgpu_ttm_placement_from_domain(bo, domain);
643 for (i = 0; i < bo->placement.num_placement; i++) {
644 /* force to pin into visible video ram */
645 if ((bo->placements[i].flags & TTM_PL_FLAG_VRAM) &&
646 !(bo->flags & AMDGPU_GEM_CREATE_NO_CPU_ACCESS) &&
647 (!max_offset || max_offset >
648 adev->mc.visible_vram_size)) {
649 if (WARN_ON_ONCE(min_offset >
650 adev->mc.visible_vram_size))
651 return -EINVAL;
652 fpfn = min_offset >> PAGE_SHIFT;
653 lpfn = adev->mc.visible_vram_size >> PAGE_SHIFT;
654 } else {
655 fpfn = min_offset >> PAGE_SHIFT;
656 lpfn = max_offset >> PAGE_SHIFT;
657 }
658 if (fpfn > bo->placements[i].fpfn)
659 bo->placements[i].fpfn = fpfn;
660 if (!bo->placements[i].lpfn ||
661 (lpfn && lpfn < bo->placements[i].lpfn))
662 bo->placements[i].lpfn = lpfn;
663 bo->placements[i].flags |= TTM_PL_FLAG_NO_EVICT;
664 }
665
666 r = ttm_bo_validate(&bo->tbo, &bo->placement, false, false);
667 if (unlikely(r)) {
668 dev_err(adev->dev, "%p pin failed\n", bo);
669 goto error;
670 }
671 r = amdgpu_ttm_bind(&bo->tbo, &bo->tbo.mem);
672 if (unlikely(r)) {
673 dev_err(adev->dev, "%p bind failed\n", bo);
674 goto error;
675 }
676
677 bo->pin_count = 1;
678 if (gpu_addr != NULL)
679 *gpu_addr = amdgpu_bo_gpu_offset(bo);
680 if (domain == AMDGPU_GEM_DOMAIN_VRAM) {
681 adev->vram_pin_size += amdgpu_bo_size(bo);
682 if (bo->flags & AMDGPU_GEM_CREATE_NO_CPU_ACCESS)
683 adev->invisible_pin_size += amdgpu_bo_size(bo);
684 } else if (domain == AMDGPU_GEM_DOMAIN_GTT) {
685 adev->gart_pin_size += amdgpu_bo_size(bo);
686 }
687
688error:
689 return r;
690}
691
692int amdgpu_bo_pin(struct amdgpu_bo *bo, u32 domain, u64 *gpu_addr)
693{
694 return amdgpu_bo_pin_restricted(bo, domain, 0, 0, gpu_addr);
695}
696
697int amdgpu_bo_unpin(struct amdgpu_bo *bo)
698{
699 struct amdgpu_device *adev = amdgpu_ttm_adev(bo->tbo.bdev);
700 int r, i;
701
702 if (!bo->pin_count) {
703 dev_warn(adev->dev, "%p unpin not necessary\n", bo);
704 return 0;
705 }
706 bo->pin_count--;
707 if (bo->pin_count)
708 return 0;
709 for (i = 0; i < bo->placement.num_placement; i++) {
710 bo->placements[i].lpfn = 0;
711 bo->placements[i].flags &= ~TTM_PL_FLAG_NO_EVICT;
712 }
713 r = ttm_bo_validate(&bo->tbo, &bo->placement, false, false);
714 if (unlikely(r)) {
715 dev_err(adev->dev, "%p validate failed for unpin\n", bo);
716 goto error;
717 }
718
719 if (bo->tbo.mem.mem_type == TTM_PL_VRAM) {
720 adev->vram_pin_size -= amdgpu_bo_size(bo);
721 if (bo->flags & AMDGPU_GEM_CREATE_NO_CPU_ACCESS)
722 adev->invisible_pin_size -= amdgpu_bo_size(bo);
723 } else if (bo->tbo.mem.mem_type == TTM_PL_TT) {
724 adev->gart_pin_size -= amdgpu_bo_size(bo);
725 }
726
727error:
728 return r;
729}
730
731int amdgpu_bo_evict_vram(struct amdgpu_device *adev)
732{
733 /* late 2.6.33 fix IGP hibernate - we need pm ops to do this correct */
734 if (0 && (adev->flags & AMD_IS_APU)) {
735 /* Useless to evict on IGP chips */
736 return 0;
737 }
738 return ttm_bo_evict_mm(&adev->mman.bdev, TTM_PL_VRAM);
739}
740
741static const char *amdgpu_vram_names[] = {
742 "UNKNOWN",
743 "GDDR1",
744 "DDR2",
745 "GDDR3",
746 "GDDR4",
747 "GDDR5",
748 "HBM",
749 "DDR3"
750};
751
752int amdgpu_bo_init(struct amdgpu_device *adev)
753{
754 /* reserve PAT memory space to WC for VRAM */
755 arch_io_reserve_memtype_wc(adev->mc.aper_base,
756 adev->mc.aper_size);
757
758 /* Add an MTRR for the VRAM */
759 adev->mc.vram_mtrr = arch_phys_wc_add(adev->mc.aper_base,
760 adev->mc.aper_size);
761 DRM_INFO("Detected VRAM RAM=%lluM, BAR=%lluM\n",
762 adev->mc.mc_vram_size >> 20,
763 (unsigned long long)adev->mc.aper_size >> 20);
764 DRM_INFO("RAM width %dbits %s\n",
765 adev->mc.vram_width, amdgpu_vram_names[adev->mc.vram_type]);
766 return amdgpu_ttm_init(adev);
767}
768
769void amdgpu_bo_fini(struct amdgpu_device *adev)
770{
771 amdgpu_ttm_fini(adev);
772 arch_phys_wc_del(adev->mc.vram_mtrr);
773 arch_io_free_memtype_wc(adev->mc.aper_base, adev->mc.aper_size);
774}
775
776int amdgpu_bo_fbdev_mmap(struct amdgpu_bo *bo,
777 struct vm_area_struct *vma)
778{
779 return ttm_fbdev_mmap(vma, &bo->tbo);
780}
781
782int amdgpu_bo_set_tiling_flags(struct amdgpu_bo *bo, u64 tiling_flags)
783{
784 if (AMDGPU_TILING_GET(tiling_flags, TILE_SPLIT) > 6)
785 return -EINVAL;
786
787 bo->tiling_flags = tiling_flags;
788 return 0;
789}
790
791void amdgpu_bo_get_tiling_flags(struct amdgpu_bo *bo, u64 *tiling_flags)
792{
793 lockdep_assert_held(&bo->tbo.resv->lock.base);
794
795 if (tiling_flags)
796 *tiling_flags = bo->tiling_flags;
797}
798
799int amdgpu_bo_set_metadata (struct amdgpu_bo *bo, void *metadata,
800 uint32_t metadata_size, uint64_t flags)
801{
802 void *buffer;
803
804 if (!metadata_size) {
805 if (bo->metadata_size) {
806 kfree(bo->metadata);
807 bo->metadata = NULL;
808 bo->metadata_size = 0;
809 }
810 return 0;
811 }
812
813 if (metadata == NULL)
814 return -EINVAL;
815
816 buffer = kmemdup(metadata, metadata_size, GFP_KERNEL);
817 if (buffer == NULL)
818 return -ENOMEM;
819
820 kfree(bo->metadata);
821 bo->metadata_flags = flags;
822 bo->metadata = buffer;
823 bo->metadata_size = metadata_size;
824
825 return 0;
826}
827
828int amdgpu_bo_get_metadata(struct amdgpu_bo *bo, void *buffer,
829 size_t buffer_size, uint32_t *metadata_size,
830 uint64_t *flags)
831{
832 if (!buffer && !metadata_size)
833 return -EINVAL;
834
835 if (buffer) {
836 if (buffer_size < bo->metadata_size)
837 return -EINVAL;
838
839 if (bo->metadata_size)
840 memcpy(buffer, bo->metadata, bo->metadata_size);
841 }
842
843 if (metadata_size)
844 *metadata_size = bo->metadata_size;
845 if (flags)
846 *flags = bo->metadata_flags;
847
848 return 0;
849}
850
851void amdgpu_bo_move_notify(struct ttm_buffer_object *bo,
852 struct ttm_mem_reg *new_mem)
853{
854 struct amdgpu_device *adev = amdgpu_ttm_adev(bo->bdev);
855 struct amdgpu_bo *abo;
856 struct ttm_mem_reg *old_mem = &bo->mem;
857
858 if (!amdgpu_ttm_bo_is_amdgpu_bo(bo))
859 return;
860
861 abo = container_of(bo, struct amdgpu_bo, tbo);
862 amdgpu_vm_bo_invalidate(adev, abo);
863
864 /* update statistics */
865 if (!new_mem)
866 return;
867
868 /* move_notify is called before move happens */
869 amdgpu_update_memory_usage(adev, &bo->mem, new_mem);
870
871 trace_amdgpu_ttm_bo_move(abo, new_mem->mem_type, old_mem->mem_type);
872}
873
874int amdgpu_bo_fault_reserve_notify(struct ttm_buffer_object *bo)
875{
876 struct amdgpu_device *adev = amdgpu_ttm_adev(bo->bdev);
877 struct amdgpu_bo *abo;
878 unsigned long offset, size, lpfn;
879 int i, r;
880
881 if (!amdgpu_ttm_bo_is_amdgpu_bo(bo))
882 return 0;
883
884 abo = container_of(bo, struct amdgpu_bo, tbo);
885 if (bo->mem.mem_type != TTM_PL_VRAM)
886 return 0;
887
888 size = bo->mem.num_pages << PAGE_SHIFT;
889 offset = bo->mem.start << PAGE_SHIFT;
890 /* TODO: figure out how to map scattered VRAM to the CPU */
891 if ((offset + size) <= adev->mc.visible_vram_size &&
892 (abo->flags & AMDGPU_GEM_CREATE_VRAM_CONTIGUOUS))
893 return 0;
894
895 /* Can't move a pinned BO to visible VRAM */
896 if (abo->pin_count > 0)
897 return -EINVAL;
898
899 /* hurrah the memory is not visible ! */
900 abo->flags |= AMDGPU_GEM_CREATE_VRAM_CONTIGUOUS;
901 amdgpu_ttm_placement_from_domain(abo, AMDGPU_GEM_DOMAIN_VRAM);
902 lpfn = adev->mc.visible_vram_size >> PAGE_SHIFT;
903 for (i = 0; i < abo->placement.num_placement; i++) {
904 /* Force into visible VRAM */
905 if ((abo->placements[i].flags & TTM_PL_FLAG_VRAM) &&
906 (!abo->placements[i].lpfn ||
907 abo->placements[i].lpfn > lpfn))
908 abo->placements[i].lpfn = lpfn;
909 }
910 r = ttm_bo_validate(bo, &abo->placement, false, false);
911 if (unlikely(r == -ENOMEM)) {
912 amdgpu_ttm_placement_from_domain(abo, AMDGPU_GEM_DOMAIN_GTT);
913 return ttm_bo_validate(bo, &abo->placement, false, false);
914 } else if (unlikely(r != 0)) {
915 return r;
916 }
917
918 offset = bo->mem.start << PAGE_SHIFT;
919 /* this should never happen */
920 if ((offset + size) > adev->mc.visible_vram_size)
921 return -EINVAL;
922
923 return 0;
924}
925
926/**
927 * amdgpu_bo_fence - add fence to buffer object
928 *
929 * @bo: buffer object in question
930 * @fence: fence to add
931 * @shared: true if fence should be added shared
932 *
933 */
934void amdgpu_bo_fence(struct amdgpu_bo *bo, struct dma_fence *fence,
935 bool shared)
936{
937 struct reservation_object *resv = bo->tbo.resv;
938
939 if (shared)
940 reservation_object_add_shared_fence(resv, fence);
941 else
942 reservation_object_add_excl_fence(resv, fence);
943}
944
945/**
946 * amdgpu_bo_gpu_offset - return GPU offset of bo
947 * @bo: amdgpu object for which we query the offset
948 *
949 * Returns current GPU offset of the object.
950 *
951 * Note: object should either be pinned or reserved when calling this
952 * function, it might be useful to add check for this for debugging.
953 */
954u64 amdgpu_bo_gpu_offset(struct amdgpu_bo *bo)
955{
956 WARN_ON_ONCE(bo->tbo.mem.mem_type == TTM_PL_SYSTEM);
957 WARN_ON_ONCE(bo->tbo.mem.mem_type == TTM_PL_TT &&
958 !amdgpu_ttm_is_bound(bo->tbo.ttm));
959 WARN_ON_ONCE(!ww_mutex_is_locked(&bo->tbo.resv->lock) &&
960 !bo->pin_count);
961 WARN_ON_ONCE(bo->tbo.mem.start == AMDGPU_BO_INVALID_OFFSET);
962 WARN_ON_ONCE(bo->tbo.mem.mem_type == TTM_PL_VRAM &&
963 !(bo->flags & AMDGPU_GEM_CREATE_VRAM_CONTIGUOUS));
964
965 return bo->tbo.offset;
966}