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1/*
2 * Copyright 2016 Advanced Micro Devices, Inc.
3 *
4 * Permission is hereby granted, free of charge, to any person obtaining a
5 * copy of this software and associated documentation files (the "Software"),
6 * to deal in the Software without restriction, including without limitation
7 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
8 * and/or sell copies of the Software, and to permit persons to whom the
9 * Software is furnished to do so, subject to the following conditions:
10 *
11 * The above copyright notice and this permission notice shall be included in
12 * all copies or substantial portions of the Software.
13 *
14 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
15 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
16 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
17 * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
18 * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
19 * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
20 * OTHER DEALINGS IN THE SOFTWARE.
21 *
22 * Authors: Christian König
23 */
24
25#include <linux/dma-mapping.h>
26#include <drm/ttm/ttm_range_manager.h>
27
28#include "amdgpu.h"
29#include "amdgpu_vm.h"
30#include "amdgpu_res_cursor.h"
31#include "amdgpu_atomfirmware.h"
32#include "atom.h"
33
34struct amdgpu_vram_reservation {
35 u64 start;
36 u64 size;
37 struct list_head allocated;
38 struct list_head blocks;
39};
40
41static inline struct amdgpu_vram_mgr *
42to_vram_mgr(struct ttm_resource_manager *man)
43{
44 return container_of(man, struct amdgpu_vram_mgr, manager);
45}
46
47static inline struct amdgpu_device *
48to_amdgpu_device(struct amdgpu_vram_mgr *mgr)
49{
50 return container_of(mgr, struct amdgpu_device, mman.vram_mgr);
51}
52
53static inline struct drm_buddy_block *
54amdgpu_vram_mgr_first_block(struct list_head *list)
55{
56 return list_first_entry_or_null(list, struct drm_buddy_block, link);
57}
58
59static inline bool amdgpu_is_vram_mgr_blocks_contiguous(struct list_head *head)
60{
61 struct drm_buddy_block *block;
62 u64 start, size;
63
64 block = amdgpu_vram_mgr_first_block(head);
65 if (!block)
66 return false;
67
68 while (head != block->link.next) {
69 start = amdgpu_vram_mgr_block_start(block);
70 size = amdgpu_vram_mgr_block_size(block);
71
72 block = list_entry(block->link.next, struct drm_buddy_block, link);
73 if (start + size != amdgpu_vram_mgr_block_start(block))
74 return false;
75 }
76
77 return true;
78}
79
80static inline u64 amdgpu_vram_mgr_blocks_size(struct list_head *head)
81{
82 struct drm_buddy_block *block;
83 u64 size = 0;
84
85 list_for_each_entry(block, head, link)
86 size += amdgpu_vram_mgr_block_size(block);
87
88 return size;
89}
90
91/**
92 * DOC: mem_info_vram_total
93 *
94 * The amdgpu driver provides a sysfs API for reporting current total VRAM
95 * available on the device
96 * The file mem_info_vram_total is used for this and returns the total
97 * amount of VRAM in bytes
98 */
99static ssize_t amdgpu_mem_info_vram_total_show(struct device *dev,
100 struct device_attribute *attr, char *buf)
101{
102 struct drm_device *ddev = dev_get_drvdata(dev);
103 struct amdgpu_device *adev = drm_to_adev(ddev);
104
105 return sysfs_emit(buf, "%llu\n", adev->gmc.real_vram_size);
106}
107
108/**
109 * DOC: mem_info_vis_vram_total
110 *
111 * The amdgpu driver provides a sysfs API for reporting current total
112 * visible VRAM available on the device
113 * The file mem_info_vis_vram_total is used for this and returns the total
114 * amount of visible VRAM in bytes
115 */
116static ssize_t amdgpu_mem_info_vis_vram_total_show(struct device *dev,
117 struct device_attribute *attr, char *buf)
118{
119 struct drm_device *ddev = dev_get_drvdata(dev);
120 struct amdgpu_device *adev = drm_to_adev(ddev);
121
122 return sysfs_emit(buf, "%llu\n", adev->gmc.visible_vram_size);
123}
124
125/**
126 * DOC: mem_info_vram_used
127 *
128 * The amdgpu driver provides a sysfs API for reporting current total VRAM
129 * available on the device
130 * The file mem_info_vram_used is used for this and returns the total
131 * amount of currently used VRAM in bytes
132 */
133static ssize_t amdgpu_mem_info_vram_used_show(struct device *dev,
134 struct device_attribute *attr,
135 char *buf)
136{
137 struct drm_device *ddev = dev_get_drvdata(dev);
138 struct amdgpu_device *adev = drm_to_adev(ddev);
139 struct ttm_resource_manager *man = &adev->mman.vram_mgr.manager;
140
141 return sysfs_emit(buf, "%llu\n", ttm_resource_manager_usage(man));
142}
143
144/**
145 * DOC: mem_info_vis_vram_used
146 *
147 * The amdgpu driver provides a sysfs API for reporting current total of
148 * used visible VRAM
149 * The file mem_info_vis_vram_used is used for this and returns the total
150 * amount of currently used visible VRAM in bytes
151 */
152static ssize_t amdgpu_mem_info_vis_vram_used_show(struct device *dev,
153 struct device_attribute *attr,
154 char *buf)
155{
156 struct drm_device *ddev = dev_get_drvdata(dev);
157 struct amdgpu_device *adev = drm_to_adev(ddev);
158
159 return sysfs_emit(buf, "%llu\n",
160 amdgpu_vram_mgr_vis_usage(&adev->mman.vram_mgr));
161}
162
163/**
164 * DOC: mem_info_vram_vendor
165 *
166 * The amdgpu driver provides a sysfs API for reporting the vendor of the
167 * installed VRAM
168 * The file mem_info_vram_vendor is used for this and returns the name of the
169 * vendor.
170 */
171static ssize_t amdgpu_mem_info_vram_vendor(struct device *dev,
172 struct device_attribute *attr,
173 char *buf)
174{
175 struct drm_device *ddev = dev_get_drvdata(dev);
176 struct amdgpu_device *adev = drm_to_adev(ddev);
177
178 switch (adev->gmc.vram_vendor) {
179 case SAMSUNG:
180 return sysfs_emit(buf, "samsung\n");
181 case INFINEON:
182 return sysfs_emit(buf, "infineon\n");
183 case ELPIDA:
184 return sysfs_emit(buf, "elpida\n");
185 case ETRON:
186 return sysfs_emit(buf, "etron\n");
187 case NANYA:
188 return sysfs_emit(buf, "nanya\n");
189 case HYNIX:
190 return sysfs_emit(buf, "hynix\n");
191 case MOSEL:
192 return sysfs_emit(buf, "mosel\n");
193 case WINBOND:
194 return sysfs_emit(buf, "winbond\n");
195 case ESMT:
196 return sysfs_emit(buf, "esmt\n");
197 case MICRON:
198 return sysfs_emit(buf, "micron\n");
199 default:
200 return sysfs_emit(buf, "unknown\n");
201 }
202}
203
204static DEVICE_ATTR(mem_info_vram_total, S_IRUGO,
205 amdgpu_mem_info_vram_total_show, NULL);
206static DEVICE_ATTR(mem_info_vis_vram_total, S_IRUGO,
207 amdgpu_mem_info_vis_vram_total_show,NULL);
208static DEVICE_ATTR(mem_info_vram_used, S_IRUGO,
209 amdgpu_mem_info_vram_used_show, NULL);
210static DEVICE_ATTR(mem_info_vis_vram_used, S_IRUGO,
211 amdgpu_mem_info_vis_vram_used_show, NULL);
212static DEVICE_ATTR(mem_info_vram_vendor, S_IRUGO,
213 amdgpu_mem_info_vram_vendor, NULL);
214
215static struct attribute *amdgpu_vram_mgr_attributes[] = {
216 &dev_attr_mem_info_vram_total.attr,
217 &dev_attr_mem_info_vis_vram_total.attr,
218 &dev_attr_mem_info_vram_used.attr,
219 &dev_attr_mem_info_vis_vram_used.attr,
220 &dev_attr_mem_info_vram_vendor.attr,
221 NULL
222};
223
224static umode_t amdgpu_vram_attrs_is_visible(struct kobject *kobj,
225 struct attribute *attr, int i)
226{
227 struct device *dev = kobj_to_dev(kobj);
228 struct drm_device *ddev = dev_get_drvdata(dev);
229 struct amdgpu_device *adev = drm_to_adev(ddev);
230
231 if (attr == &dev_attr_mem_info_vram_vendor.attr &&
232 !adev->gmc.vram_vendor)
233 return 0;
234
235 return attr->mode;
236}
237
238const struct attribute_group amdgpu_vram_mgr_attr_group = {
239 .attrs = amdgpu_vram_mgr_attributes,
240 .is_visible = amdgpu_vram_attrs_is_visible
241};
242
243/**
244 * amdgpu_vram_mgr_vis_size - Calculate visible block size
245 *
246 * @adev: amdgpu_device pointer
247 * @block: DRM BUDDY block structure
248 *
249 * Calculate how many bytes of the DRM BUDDY block are inside visible VRAM
250 */
251static u64 amdgpu_vram_mgr_vis_size(struct amdgpu_device *adev,
252 struct drm_buddy_block *block)
253{
254 u64 start = amdgpu_vram_mgr_block_start(block);
255 u64 end = start + amdgpu_vram_mgr_block_size(block);
256
257 if (start >= adev->gmc.visible_vram_size)
258 return 0;
259
260 return (end > adev->gmc.visible_vram_size ?
261 adev->gmc.visible_vram_size : end) - start;
262}
263
264/**
265 * amdgpu_vram_mgr_bo_visible_size - CPU visible BO size
266 *
267 * @bo: &amdgpu_bo buffer object (must be in VRAM)
268 *
269 * Returns:
270 * How much of the given &amdgpu_bo buffer object lies in CPU visible VRAM.
271 */
272u64 amdgpu_vram_mgr_bo_visible_size(struct amdgpu_bo *bo)
273{
274 struct amdgpu_device *adev = amdgpu_ttm_adev(bo->tbo.bdev);
275 struct ttm_resource *res = bo->tbo.resource;
276 struct amdgpu_vram_mgr_resource *vres = to_amdgpu_vram_mgr_resource(res);
277 struct drm_buddy_block *block;
278 u64 usage = 0;
279
280 if (amdgpu_gmc_vram_full_visible(&adev->gmc))
281 return amdgpu_bo_size(bo);
282
283 if (res->start >= adev->gmc.visible_vram_size >> PAGE_SHIFT)
284 return 0;
285
286 list_for_each_entry(block, &vres->blocks, link)
287 usage += amdgpu_vram_mgr_vis_size(adev, block);
288
289 return usage;
290}
291
292/* Commit the reservation of VRAM pages */
293static void amdgpu_vram_mgr_do_reserve(struct ttm_resource_manager *man)
294{
295 struct amdgpu_vram_mgr *mgr = to_vram_mgr(man);
296 struct amdgpu_device *adev = to_amdgpu_device(mgr);
297 struct drm_buddy *mm = &mgr->mm;
298 struct amdgpu_vram_reservation *rsv, *temp;
299 struct drm_buddy_block *block;
300 uint64_t vis_usage;
301
302 list_for_each_entry_safe(rsv, temp, &mgr->reservations_pending, blocks) {
303 if (drm_buddy_alloc_blocks(mm, rsv->start, rsv->start + rsv->size,
304 rsv->size, mm->chunk_size, &rsv->allocated,
305 DRM_BUDDY_RANGE_ALLOCATION))
306 continue;
307
308 block = amdgpu_vram_mgr_first_block(&rsv->allocated);
309 if (!block)
310 continue;
311
312 dev_dbg(adev->dev, "Reservation 0x%llx - %lld, Succeeded\n",
313 rsv->start, rsv->size);
314
315 vis_usage = amdgpu_vram_mgr_vis_size(adev, block);
316 atomic64_add(vis_usage, &mgr->vis_usage);
317 spin_lock(&man->bdev->lru_lock);
318 man->usage += rsv->size;
319 spin_unlock(&man->bdev->lru_lock);
320 list_move(&rsv->blocks, &mgr->reserved_pages);
321 }
322}
323
324/**
325 * amdgpu_vram_mgr_reserve_range - Reserve a range from VRAM
326 *
327 * @mgr: amdgpu_vram_mgr pointer
328 * @start: start address of the range in VRAM
329 * @size: size of the range
330 *
331 * Reserve memory from start address with the specified size in VRAM
332 */
333int amdgpu_vram_mgr_reserve_range(struct amdgpu_vram_mgr *mgr,
334 uint64_t start, uint64_t size)
335{
336 struct amdgpu_vram_reservation *rsv;
337
338 rsv = kzalloc(sizeof(*rsv), GFP_KERNEL);
339 if (!rsv)
340 return -ENOMEM;
341
342 INIT_LIST_HEAD(&rsv->allocated);
343 INIT_LIST_HEAD(&rsv->blocks);
344
345 rsv->start = start;
346 rsv->size = size;
347
348 mutex_lock(&mgr->lock);
349 list_add_tail(&rsv->blocks, &mgr->reservations_pending);
350 amdgpu_vram_mgr_do_reserve(&mgr->manager);
351 mutex_unlock(&mgr->lock);
352
353 return 0;
354}
355
356/**
357 * amdgpu_vram_mgr_query_page_status - query the reservation status
358 *
359 * @mgr: amdgpu_vram_mgr pointer
360 * @start: start address of a page in VRAM
361 *
362 * Returns:
363 * -EBUSY: the page is still hold and in pending list
364 * 0: the page has been reserved
365 * -ENOENT: the input page is not a reservation
366 */
367int amdgpu_vram_mgr_query_page_status(struct amdgpu_vram_mgr *mgr,
368 uint64_t start)
369{
370 struct amdgpu_vram_reservation *rsv;
371 int ret;
372
373 mutex_lock(&mgr->lock);
374
375 list_for_each_entry(rsv, &mgr->reservations_pending, blocks) {
376 if (rsv->start <= start &&
377 (start < (rsv->start + rsv->size))) {
378 ret = -EBUSY;
379 goto out;
380 }
381 }
382
383 list_for_each_entry(rsv, &mgr->reserved_pages, blocks) {
384 if (rsv->start <= start &&
385 (start < (rsv->start + rsv->size))) {
386 ret = 0;
387 goto out;
388 }
389 }
390
391 ret = -ENOENT;
392out:
393 mutex_unlock(&mgr->lock);
394 return ret;
395}
396
397static void amdgpu_dummy_vram_mgr_debug(struct ttm_resource_manager *man,
398 struct drm_printer *printer)
399{
400 DRM_DEBUG_DRIVER("Dummy vram mgr debug\n");
401}
402
403static bool amdgpu_dummy_vram_mgr_compatible(struct ttm_resource_manager *man,
404 struct ttm_resource *res,
405 const struct ttm_place *place,
406 size_t size)
407{
408 DRM_DEBUG_DRIVER("Dummy vram mgr compatible\n");
409 return false;
410}
411
412static bool amdgpu_dummy_vram_mgr_intersects(struct ttm_resource_manager *man,
413 struct ttm_resource *res,
414 const struct ttm_place *place,
415 size_t size)
416{
417 DRM_DEBUG_DRIVER("Dummy vram mgr intersects\n");
418 return true;
419}
420
421static void amdgpu_dummy_vram_mgr_del(struct ttm_resource_manager *man,
422 struct ttm_resource *res)
423{
424 DRM_DEBUG_DRIVER("Dummy vram mgr deleted\n");
425}
426
427static int amdgpu_dummy_vram_mgr_new(struct ttm_resource_manager *man,
428 struct ttm_buffer_object *tbo,
429 const struct ttm_place *place,
430 struct ttm_resource **res)
431{
432 DRM_DEBUG_DRIVER("Dummy vram mgr new\n");
433 return -ENOSPC;
434}
435
436/**
437 * amdgpu_vram_mgr_new - allocate new ranges
438 *
439 * @man: TTM memory type manager
440 * @tbo: TTM BO we need this range for
441 * @place: placement flags and restrictions
442 * @res: the resulting mem object
443 *
444 * Allocate VRAM for the given BO.
445 */
446static int amdgpu_vram_mgr_new(struct ttm_resource_manager *man,
447 struct ttm_buffer_object *tbo,
448 const struct ttm_place *place,
449 struct ttm_resource **res)
450{
451 struct amdgpu_vram_mgr *mgr = to_vram_mgr(man);
452 struct amdgpu_device *adev = to_amdgpu_device(mgr);
453 u64 vis_usage = 0, max_bytes, min_block_size;
454 struct amdgpu_vram_mgr_resource *vres;
455 u64 size, remaining_size, lpfn, fpfn;
456 struct drm_buddy *mm = &mgr->mm;
457 struct drm_buddy_block *block;
458 unsigned long pages_per_block;
459 int r;
460
461 lpfn = (u64)place->lpfn << PAGE_SHIFT;
462 if (!lpfn)
463 lpfn = man->size;
464
465 fpfn = (u64)place->fpfn << PAGE_SHIFT;
466
467 max_bytes = adev->gmc.mc_vram_size;
468 if (tbo->type != ttm_bo_type_kernel)
469 max_bytes -= AMDGPU_VM_RESERVED_VRAM;
470
471 if (place->flags & TTM_PL_FLAG_CONTIGUOUS) {
472 pages_per_block = ~0ul;
473 } else {
474#ifdef CONFIG_TRANSPARENT_HUGEPAGE
475 pages_per_block = HPAGE_PMD_NR;
476#else
477 /* default to 2MB */
478 pages_per_block = 2UL << (20UL - PAGE_SHIFT);
479#endif
480 pages_per_block = max_t(uint32_t, pages_per_block,
481 tbo->page_alignment);
482 }
483
484 vres = kzalloc(sizeof(*vres), GFP_KERNEL);
485 if (!vres)
486 return -ENOMEM;
487
488 ttm_resource_init(tbo, place, &vres->base);
489
490 /* bail out quickly if there's likely not enough VRAM for this BO */
491 if (ttm_resource_manager_usage(man) > max_bytes) {
492 r = -ENOSPC;
493 goto error_fini;
494 }
495
496 INIT_LIST_HEAD(&vres->blocks);
497
498 if (place->flags & TTM_PL_FLAG_TOPDOWN)
499 vres->flags |= DRM_BUDDY_TOPDOWN_ALLOCATION;
500
501 if (place->flags & TTM_PL_FLAG_CONTIGUOUS)
502 vres->flags |= DRM_BUDDY_CONTIGUOUS_ALLOCATION;
503
504 if (fpfn || lpfn != mgr->mm.size)
505 /* Allocate blocks in desired range */
506 vres->flags |= DRM_BUDDY_RANGE_ALLOCATION;
507
508 remaining_size = (u64)vres->base.size;
509
510 mutex_lock(&mgr->lock);
511 while (remaining_size) {
512 if (tbo->page_alignment)
513 min_block_size = (u64)tbo->page_alignment << PAGE_SHIFT;
514 else
515 min_block_size = mgr->default_page_size;
516
517 BUG_ON(min_block_size < mm->chunk_size);
518
519 /* Limit maximum size to 2GiB due to SG table limitations */
520 size = min(remaining_size, 2ULL << 30);
521
522 if ((size >= (u64)pages_per_block << PAGE_SHIFT) &&
523 !(size & (((u64)pages_per_block << PAGE_SHIFT) - 1)))
524 min_block_size = (u64)pages_per_block << PAGE_SHIFT;
525
526 r = drm_buddy_alloc_blocks(mm, fpfn,
527 lpfn,
528 size,
529 min_block_size,
530 &vres->blocks,
531 vres->flags);
532 if (unlikely(r))
533 goto error_free_blocks;
534
535 if (size > remaining_size)
536 remaining_size = 0;
537 else
538 remaining_size -= size;
539 }
540 mutex_unlock(&mgr->lock);
541
542 vres->base.start = 0;
543 size = max_t(u64, amdgpu_vram_mgr_blocks_size(&vres->blocks),
544 vres->base.size);
545 list_for_each_entry(block, &vres->blocks, link) {
546 unsigned long start;
547
548 start = amdgpu_vram_mgr_block_start(block) +
549 amdgpu_vram_mgr_block_size(block);
550 start >>= PAGE_SHIFT;
551
552 if (start > PFN_UP(size))
553 start -= PFN_UP(size);
554 else
555 start = 0;
556 vres->base.start = max(vres->base.start, start);
557
558 vis_usage += amdgpu_vram_mgr_vis_size(adev, block);
559 }
560
561 if (amdgpu_is_vram_mgr_blocks_contiguous(&vres->blocks))
562 vres->base.placement |= TTM_PL_FLAG_CONTIGUOUS;
563
564 if (adev->gmc.xgmi.connected_to_cpu)
565 vres->base.bus.caching = ttm_cached;
566 else
567 vres->base.bus.caching = ttm_write_combined;
568
569 atomic64_add(vis_usage, &mgr->vis_usage);
570 *res = &vres->base;
571 return 0;
572
573error_free_blocks:
574 drm_buddy_free_list(mm, &vres->blocks);
575 mutex_unlock(&mgr->lock);
576error_fini:
577 ttm_resource_fini(man, &vres->base);
578 kfree(vres);
579
580 return r;
581}
582
583/**
584 * amdgpu_vram_mgr_del - free ranges
585 *
586 * @man: TTM memory type manager
587 * @res: TTM memory object
588 *
589 * Free the allocated VRAM again.
590 */
591static void amdgpu_vram_mgr_del(struct ttm_resource_manager *man,
592 struct ttm_resource *res)
593{
594 struct amdgpu_vram_mgr_resource *vres = to_amdgpu_vram_mgr_resource(res);
595 struct amdgpu_vram_mgr *mgr = to_vram_mgr(man);
596 struct amdgpu_device *adev = to_amdgpu_device(mgr);
597 struct drm_buddy *mm = &mgr->mm;
598 struct drm_buddy_block *block;
599 uint64_t vis_usage = 0;
600
601 mutex_lock(&mgr->lock);
602 list_for_each_entry(block, &vres->blocks, link)
603 vis_usage += amdgpu_vram_mgr_vis_size(adev, block);
604
605 amdgpu_vram_mgr_do_reserve(man);
606
607 drm_buddy_free_list(mm, &vres->blocks);
608 mutex_unlock(&mgr->lock);
609
610 atomic64_sub(vis_usage, &mgr->vis_usage);
611
612 ttm_resource_fini(man, res);
613 kfree(vres);
614}
615
616/**
617 * amdgpu_vram_mgr_alloc_sgt - allocate and fill a sg table
618 *
619 * @adev: amdgpu device pointer
620 * @res: TTM memory object
621 * @offset: byte offset from the base of VRAM BO
622 * @length: number of bytes to export in sg_table
623 * @dev: the other device
624 * @dir: dma direction
625 * @sgt: resulting sg table
626 *
627 * Allocate and fill a sg table from a VRAM allocation.
628 */
629int amdgpu_vram_mgr_alloc_sgt(struct amdgpu_device *adev,
630 struct ttm_resource *res,
631 u64 offset, u64 length,
632 struct device *dev,
633 enum dma_data_direction dir,
634 struct sg_table **sgt)
635{
636 struct amdgpu_res_cursor cursor;
637 struct scatterlist *sg;
638 int num_entries = 0;
639 int i, r;
640
641 *sgt = kmalloc(sizeof(**sgt), GFP_KERNEL);
642 if (!*sgt)
643 return -ENOMEM;
644
645 /* Determine the number of DRM_BUDDY blocks to export */
646 amdgpu_res_first(res, offset, length, &cursor);
647 while (cursor.remaining) {
648 num_entries++;
649 amdgpu_res_next(&cursor, cursor.size);
650 }
651
652 r = sg_alloc_table(*sgt, num_entries, GFP_KERNEL);
653 if (r)
654 goto error_free;
655
656 /* Initialize scatterlist nodes of sg_table */
657 for_each_sgtable_sg((*sgt), sg, i)
658 sg->length = 0;
659
660 /*
661 * Walk down DRM_BUDDY blocks to populate scatterlist nodes
662 * @note: Use iterator api to get first the DRM_BUDDY block
663 * and the number of bytes from it. Access the following
664 * DRM_BUDDY block(s) if more buffer needs to exported
665 */
666 amdgpu_res_first(res, offset, length, &cursor);
667 for_each_sgtable_sg((*sgt), sg, i) {
668 phys_addr_t phys = cursor.start + adev->gmc.aper_base;
669 size_t size = cursor.size;
670 dma_addr_t addr;
671
672 addr = dma_map_resource(dev, phys, size, dir,
673 DMA_ATTR_SKIP_CPU_SYNC);
674 r = dma_mapping_error(dev, addr);
675 if (r)
676 goto error_unmap;
677
678 sg_set_page(sg, NULL, size, 0);
679 sg_dma_address(sg) = addr;
680 sg_dma_len(sg) = size;
681
682 amdgpu_res_next(&cursor, cursor.size);
683 }
684
685 return 0;
686
687error_unmap:
688 for_each_sgtable_sg((*sgt), sg, i) {
689 if (!sg->length)
690 continue;
691
692 dma_unmap_resource(dev, sg->dma_address,
693 sg->length, dir,
694 DMA_ATTR_SKIP_CPU_SYNC);
695 }
696 sg_free_table(*sgt);
697
698error_free:
699 kfree(*sgt);
700 return r;
701}
702
703/**
704 * amdgpu_vram_mgr_free_sgt - allocate and fill a sg table
705 *
706 * @dev: device pointer
707 * @dir: data direction of resource to unmap
708 * @sgt: sg table to free
709 *
710 * Free a previously allocate sg table.
711 */
712void amdgpu_vram_mgr_free_sgt(struct device *dev,
713 enum dma_data_direction dir,
714 struct sg_table *sgt)
715{
716 struct scatterlist *sg;
717 int i;
718
719 for_each_sgtable_sg(sgt, sg, i)
720 dma_unmap_resource(dev, sg->dma_address,
721 sg->length, dir,
722 DMA_ATTR_SKIP_CPU_SYNC);
723 sg_free_table(sgt);
724 kfree(sgt);
725}
726
727/**
728 * amdgpu_vram_mgr_vis_usage - how many bytes are used in the visible part
729 *
730 * @mgr: amdgpu_vram_mgr pointer
731 *
732 * Returns how many bytes are used in the visible part of VRAM
733 */
734uint64_t amdgpu_vram_mgr_vis_usage(struct amdgpu_vram_mgr *mgr)
735{
736 return atomic64_read(&mgr->vis_usage);
737}
738
739/**
740 * amdgpu_vram_mgr_intersects - test each drm buddy block for intersection
741 *
742 * @man: TTM memory type manager
743 * @res: The resource to test
744 * @place: The place to test against
745 * @size: Size of the new allocation
746 *
747 * Test each drm buddy block for intersection for eviction decision.
748 */
749static bool amdgpu_vram_mgr_intersects(struct ttm_resource_manager *man,
750 struct ttm_resource *res,
751 const struct ttm_place *place,
752 size_t size)
753{
754 struct amdgpu_vram_mgr_resource *mgr = to_amdgpu_vram_mgr_resource(res);
755 struct drm_buddy_block *block;
756
757 /* Check each drm buddy block individually */
758 list_for_each_entry(block, &mgr->blocks, link) {
759 unsigned long fpfn =
760 amdgpu_vram_mgr_block_start(block) >> PAGE_SHIFT;
761 unsigned long lpfn = fpfn +
762 (amdgpu_vram_mgr_block_size(block) >> PAGE_SHIFT);
763
764 if (place->fpfn < lpfn &&
765 (!place->lpfn || place->lpfn > fpfn))
766 return true;
767 }
768
769 return false;
770}
771
772/**
773 * amdgpu_vram_mgr_compatible - test each drm buddy block for compatibility
774 *
775 * @man: TTM memory type manager
776 * @res: The resource to test
777 * @place: The place to test against
778 * @size: Size of the new allocation
779 *
780 * Test each drm buddy block for placement compatibility.
781 */
782static bool amdgpu_vram_mgr_compatible(struct ttm_resource_manager *man,
783 struct ttm_resource *res,
784 const struct ttm_place *place,
785 size_t size)
786{
787 struct amdgpu_vram_mgr_resource *mgr = to_amdgpu_vram_mgr_resource(res);
788 struct drm_buddy_block *block;
789
790 /* Check each drm buddy block individually */
791 list_for_each_entry(block, &mgr->blocks, link) {
792 unsigned long fpfn =
793 amdgpu_vram_mgr_block_start(block) >> PAGE_SHIFT;
794 unsigned long lpfn = fpfn +
795 (amdgpu_vram_mgr_block_size(block) >> PAGE_SHIFT);
796
797 if (fpfn < place->fpfn ||
798 (place->lpfn && lpfn > place->lpfn))
799 return false;
800 }
801
802 return true;
803}
804
805/**
806 * amdgpu_vram_mgr_debug - dump VRAM table
807 *
808 * @man: TTM memory type manager
809 * @printer: DRM printer to use
810 *
811 * Dump the table content using printk.
812 */
813static void amdgpu_vram_mgr_debug(struct ttm_resource_manager *man,
814 struct drm_printer *printer)
815{
816 struct amdgpu_vram_mgr *mgr = to_vram_mgr(man);
817 struct drm_buddy *mm = &mgr->mm;
818 struct amdgpu_vram_reservation *rsv;
819
820 drm_printf(printer, " vis usage:%llu\n",
821 amdgpu_vram_mgr_vis_usage(mgr));
822
823 mutex_lock(&mgr->lock);
824 drm_printf(printer, "default_page_size: %lluKiB\n",
825 mgr->default_page_size >> 10);
826
827 drm_buddy_print(mm, printer);
828
829 drm_printf(printer, "reserved:\n");
830 list_for_each_entry(rsv, &mgr->reserved_pages, blocks)
831 drm_printf(printer, "%#018llx-%#018llx: %llu\n",
832 rsv->start, rsv->start + rsv->size, rsv->size);
833 mutex_unlock(&mgr->lock);
834}
835
836static const struct ttm_resource_manager_func amdgpu_dummy_vram_mgr_func = {
837 .alloc = amdgpu_dummy_vram_mgr_new,
838 .free = amdgpu_dummy_vram_mgr_del,
839 .intersects = amdgpu_dummy_vram_mgr_intersects,
840 .compatible = amdgpu_dummy_vram_mgr_compatible,
841 .debug = amdgpu_dummy_vram_mgr_debug
842};
843
844static const struct ttm_resource_manager_func amdgpu_vram_mgr_func = {
845 .alloc = amdgpu_vram_mgr_new,
846 .free = amdgpu_vram_mgr_del,
847 .intersects = amdgpu_vram_mgr_intersects,
848 .compatible = amdgpu_vram_mgr_compatible,
849 .debug = amdgpu_vram_mgr_debug
850};
851
852/**
853 * amdgpu_vram_mgr_init - init VRAM manager and DRM MM
854 *
855 * @adev: amdgpu_device pointer
856 *
857 * Allocate and initialize the VRAM manager.
858 */
859int amdgpu_vram_mgr_init(struct amdgpu_device *adev)
860{
861 struct amdgpu_vram_mgr *mgr = &adev->mman.vram_mgr;
862 struct ttm_resource_manager *man = &mgr->manager;
863 int err;
864
865 ttm_resource_manager_init(man, &adev->mman.bdev,
866 adev->gmc.real_vram_size);
867
868 mutex_init(&mgr->lock);
869 INIT_LIST_HEAD(&mgr->reservations_pending);
870 INIT_LIST_HEAD(&mgr->reserved_pages);
871 mgr->default_page_size = PAGE_SIZE;
872
873 if (!adev->gmc.is_app_apu) {
874 man->func = &amdgpu_vram_mgr_func;
875
876 err = drm_buddy_init(&mgr->mm, man->size, PAGE_SIZE);
877 if (err)
878 return err;
879 } else {
880 man->func = &amdgpu_dummy_vram_mgr_func;
881 DRM_INFO("Setup dummy vram mgr\n");
882 }
883
884 ttm_set_driver_manager(&adev->mman.bdev, TTM_PL_VRAM, &mgr->manager);
885 ttm_resource_manager_set_used(man, true);
886 return 0;
887}
888
889/**
890 * amdgpu_vram_mgr_fini - free and destroy VRAM manager
891 *
892 * @adev: amdgpu_device pointer
893 *
894 * Destroy and free the VRAM manager, returns -EBUSY if ranges are still
895 * allocated inside it.
896 */
897void amdgpu_vram_mgr_fini(struct amdgpu_device *adev)
898{
899 struct amdgpu_vram_mgr *mgr = &adev->mman.vram_mgr;
900 struct ttm_resource_manager *man = &mgr->manager;
901 int ret;
902 struct amdgpu_vram_reservation *rsv, *temp;
903
904 ttm_resource_manager_set_used(man, false);
905
906 ret = ttm_resource_manager_evict_all(&adev->mman.bdev, man);
907 if (ret)
908 return;
909
910 mutex_lock(&mgr->lock);
911 list_for_each_entry_safe(rsv, temp, &mgr->reservations_pending, blocks)
912 kfree(rsv);
913
914 list_for_each_entry_safe(rsv, temp, &mgr->reserved_pages, blocks) {
915 drm_buddy_free_list(&mgr->mm, &rsv->allocated);
916 kfree(rsv);
917 }
918 if (!adev->gmc.is_app_apu)
919 drm_buddy_fini(&mgr->mm);
920 mutex_unlock(&mgr->lock);
921
922 ttm_resource_manager_cleanup(man);
923 ttm_set_driver_manager(&adev->mman.bdev, TTM_PL_VRAM, NULL);
924}
1/*
2 * Copyright 2016 Advanced Micro Devices, Inc.
3 *
4 * Permission is hereby granted, free of charge, to any person obtaining a
5 * copy of this software and associated documentation files (the "Software"),
6 * to deal in the Software without restriction, including without limitation
7 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
8 * and/or sell copies of the Software, and to permit persons to whom the
9 * Software is furnished to do so, subject to the following conditions:
10 *
11 * The above copyright notice and this permission notice shall be included in
12 * all copies or substantial portions of the Software.
13 *
14 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
15 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
16 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
17 * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
18 * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
19 * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
20 * OTHER DEALINGS IN THE SOFTWARE.
21 *
22 * Authors: Christian König
23 */
24
25#include <linux/dma-mapping.h>
26#include <drm/ttm/ttm_range_manager.h>
27
28#include "amdgpu.h"
29#include "amdgpu_vm.h"
30#include "amdgpu_res_cursor.h"
31#include "amdgpu_atomfirmware.h"
32#include "atom.h"
33
34struct amdgpu_vram_reservation {
35 struct list_head node;
36 struct drm_mm_node mm_node;
37};
38
39static inline struct amdgpu_vram_mgr *
40to_vram_mgr(struct ttm_resource_manager *man)
41{
42 return container_of(man, struct amdgpu_vram_mgr, manager);
43}
44
45static inline struct amdgpu_device *
46to_amdgpu_device(struct amdgpu_vram_mgr *mgr)
47{
48 return container_of(mgr, struct amdgpu_device, mman.vram_mgr);
49}
50
51/**
52 * DOC: mem_info_vram_total
53 *
54 * The amdgpu driver provides a sysfs API for reporting current total VRAM
55 * available on the device
56 * The file mem_info_vram_total is used for this and returns the total
57 * amount of VRAM in bytes
58 */
59static ssize_t amdgpu_mem_info_vram_total_show(struct device *dev,
60 struct device_attribute *attr, char *buf)
61{
62 struct drm_device *ddev = dev_get_drvdata(dev);
63 struct amdgpu_device *adev = drm_to_adev(ddev);
64
65 return sysfs_emit(buf, "%llu\n", adev->gmc.real_vram_size);
66}
67
68/**
69 * DOC: mem_info_vis_vram_total
70 *
71 * The amdgpu driver provides a sysfs API for reporting current total
72 * visible VRAM available on the device
73 * The file mem_info_vis_vram_total is used for this and returns the total
74 * amount of visible VRAM in bytes
75 */
76static ssize_t amdgpu_mem_info_vis_vram_total_show(struct device *dev,
77 struct device_attribute *attr, char *buf)
78{
79 struct drm_device *ddev = dev_get_drvdata(dev);
80 struct amdgpu_device *adev = drm_to_adev(ddev);
81
82 return sysfs_emit(buf, "%llu\n", adev->gmc.visible_vram_size);
83}
84
85/**
86 * DOC: mem_info_vram_used
87 *
88 * The amdgpu driver provides a sysfs API for reporting current total VRAM
89 * available on the device
90 * The file mem_info_vram_used is used for this and returns the total
91 * amount of currently used VRAM in bytes
92 */
93static ssize_t amdgpu_mem_info_vram_used_show(struct device *dev,
94 struct device_attribute *attr,
95 char *buf)
96{
97 struct drm_device *ddev = dev_get_drvdata(dev);
98 struct amdgpu_device *adev = drm_to_adev(ddev);
99 struct ttm_resource_manager *man;
100
101 man = ttm_manager_type(&adev->mman.bdev, TTM_PL_VRAM);
102 return sysfs_emit(buf, "%llu\n", amdgpu_vram_mgr_usage(man));
103}
104
105/**
106 * DOC: mem_info_vis_vram_used
107 *
108 * The amdgpu driver provides a sysfs API for reporting current total of
109 * used visible VRAM
110 * The file mem_info_vis_vram_used is used for this and returns the total
111 * amount of currently used visible VRAM in bytes
112 */
113static ssize_t amdgpu_mem_info_vis_vram_used_show(struct device *dev,
114 struct device_attribute *attr,
115 char *buf)
116{
117 struct drm_device *ddev = dev_get_drvdata(dev);
118 struct amdgpu_device *adev = drm_to_adev(ddev);
119 struct ttm_resource_manager *man;
120
121 man = ttm_manager_type(&adev->mman.bdev, TTM_PL_VRAM);
122 return sysfs_emit(buf, "%llu\n", amdgpu_vram_mgr_vis_usage(man));
123}
124
125/**
126 * DOC: mem_info_vram_vendor
127 *
128 * The amdgpu driver provides a sysfs API for reporting the vendor of the
129 * installed VRAM
130 * The file mem_info_vram_vendor is used for this and returns the name of the
131 * vendor.
132 */
133static ssize_t amdgpu_mem_info_vram_vendor(struct device *dev,
134 struct device_attribute *attr,
135 char *buf)
136{
137 struct drm_device *ddev = dev_get_drvdata(dev);
138 struct amdgpu_device *adev = drm_to_adev(ddev);
139
140 switch (adev->gmc.vram_vendor) {
141 case SAMSUNG:
142 return sysfs_emit(buf, "samsung\n");
143 case INFINEON:
144 return sysfs_emit(buf, "infineon\n");
145 case ELPIDA:
146 return sysfs_emit(buf, "elpida\n");
147 case ETRON:
148 return sysfs_emit(buf, "etron\n");
149 case NANYA:
150 return sysfs_emit(buf, "nanya\n");
151 case HYNIX:
152 return sysfs_emit(buf, "hynix\n");
153 case MOSEL:
154 return sysfs_emit(buf, "mosel\n");
155 case WINBOND:
156 return sysfs_emit(buf, "winbond\n");
157 case ESMT:
158 return sysfs_emit(buf, "esmt\n");
159 case MICRON:
160 return sysfs_emit(buf, "micron\n");
161 default:
162 return sysfs_emit(buf, "unknown\n");
163 }
164}
165
166static DEVICE_ATTR(mem_info_vram_total, S_IRUGO,
167 amdgpu_mem_info_vram_total_show, NULL);
168static DEVICE_ATTR(mem_info_vis_vram_total, S_IRUGO,
169 amdgpu_mem_info_vis_vram_total_show,NULL);
170static DEVICE_ATTR(mem_info_vram_used, S_IRUGO,
171 amdgpu_mem_info_vram_used_show, NULL);
172static DEVICE_ATTR(mem_info_vis_vram_used, S_IRUGO,
173 amdgpu_mem_info_vis_vram_used_show, NULL);
174static DEVICE_ATTR(mem_info_vram_vendor, S_IRUGO,
175 amdgpu_mem_info_vram_vendor, NULL);
176
177static struct attribute *amdgpu_vram_mgr_attributes[] = {
178 &dev_attr_mem_info_vram_total.attr,
179 &dev_attr_mem_info_vis_vram_total.attr,
180 &dev_attr_mem_info_vram_used.attr,
181 &dev_attr_mem_info_vis_vram_used.attr,
182 &dev_attr_mem_info_vram_vendor.attr,
183 NULL
184};
185
186const struct attribute_group amdgpu_vram_mgr_attr_group = {
187 .attrs = amdgpu_vram_mgr_attributes
188};
189
190/**
191 * amdgpu_vram_mgr_vis_size - Calculate visible node size
192 *
193 * @adev: amdgpu_device pointer
194 * @node: MM node structure
195 *
196 * Calculate how many bytes of the MM node are inside visible VRAM
197 */
198static u64 amdgpu_vram_mgr_vis_size(struct amdgpu_device *adev,
199 struct drm_mm_node *node)
200{
201 uint64_t start = node->start << PAGE_SHIFT;
202 uint64_t end = (node->size + node->start) << PAGE_SHIFT;
203
204 if (start >= adev->gmc.visible_vram_size)
205 return 0;
206
207 return (end > adev->gmc.visible_vram_size ?
208 adev->gmc.visible_vram_size : end) - start;
209}
210
211/**
212 * amdgpu_vram_mgr_bo_visible_size - CPU visible BO size
213 *
214 * @bo: &amdgpu_bo buffer object (must be in VRAM)
215 *
216 * Returns:
217 * How much of the given &amdgpu_bo buffer object lies in CPU visible VRAM.
218 */
219u64 amdgpu_vram_mgr_bo_visible_size(struct amdgpu_bo *bo)
220{
221 struct amdgpu_device *adev = amdgpu_ttm_adev(bo->tbo.bdev);
222 struct ttm_resource *res = bo->tbo.resource;
223 unsigned pages = res->num_pages;
224 struct drm_mm_node *mm;
225 u64 usage;
226
227 if (amdgpu_gmc_vram_full_visible(&adev->gmc))
228 return amdgpu_bo_size(bo);
229
230 if (res->start >= adev->gmc.visible_vram_size >> PAGE_SHIFT)
231 return 0;
232
233 mm = &container_of(res, struct ttm_range_mgr_node, base)->mm_nodes[0];
234 for (usage = 0; pages; pages -= mm->size, mm++)
235 usage += amdgpu_vram_mgr_vis_size(adev, mm);
236
237 return usage;
238}
239
240/* Commit the reservation of VRAM pages */
241static void amdgpu_vram_mgr_do_reserve(struct ttm_resource_manager *man)
242{
243 struct amdgpu_vram_mgr *mgr = to_vram_mgr(man);
244 struct amdgpu_device *adev = to_amdgpu_device(mgr);
245 struct drm_mm *mm = &mgr->mm;
246 struct amdgpu_vram_reservation *rsv, *temp;
247 uint64_t vis_usage;
248
249 list_for_each_entry_safe(rsv, temp, &mgr->reservations_pending, node) {
250 if (drm_mm_reserve_node(mm, &rsv->mm_node))
251 continue;
252
253 dev_dbg(adev->dev, "Reservation 0x%llx - %lld, Succeeded\n",
254 rsv->mm_node.start, rsv->mm_node.size);
255
256 vis_usage = amdgpu_vram_mgr_vis_size(adev, &rsv->mm_node);
257 atomic64_add(vis_usage, &mgr->vis_usage);
258 atomic64_add(rsv->mm_node.size << PAGE_SHIFT, &mgr->usage);
259 list_move(&rsv->node, &mgr->reserved_pages);
260 }
261}
262
263/**
264 * amdgpu_vram_mgr_reserve_range - Reserve a range from VRAM
265 *
266 * @man: TTM memory type manager
267 * @start: start address of the range in VRAM
268 * @size: size of the range
269 *
270 * Reserve memory from start addess with the specified size in VRAM
271 */
272int amdgpu_vram_mgr_reserve_range(struct ttm_resource_manager *man,
273 uint64_t start, uint64_t size)
274{
275 struct amdgpu_vram_mgr *mgr = to_vram_mgr(man);
276 struct amdgpu_vram_reservation *rsv;
277
278 rsv = kzalloc(sizeof(*rsv), GFP_KERNEL);
279 if (!rsv)
280 return -ENOMEM;
281
282 INIT_LIST_HEAD(&rsv->node);
283 rsv->mm_node.start = start >> PAGE_SHIFT;
284 rsv->mm_node.size = size >> PAGE_SHIFT;
285
286 spin_lock(&mgr->lock);
287 list_add_tail(&mgr->reservations_pending, &rsv->node);
288 amdgpu_vram_mgr_do_reserve(man);
289 spin_unlock(&mgr->lock);
290
291 return 0;
292}
293
294/**
295 * amdgpu_vram_mgr_query_page_status - query the reservation status
296 *
297 * @man: TTM memory type manager
298 * @start: start address of a page in VRAM
299 *
300 * Returns:
301 * -EBUSY: the page is still hold and in pending list
302 * 0: the page has been reserved
303 * -ENOENT: the input page is not a reservation
304 */
305int amdgpu_vram_mgr_query_page_status(struct ttm_resource_manager *man,
306 uint64_t start)
307{
308 struct amdgpu_vram_mgr *mgr = to_vram_mgr(man);
309 struct amdgpu_vram_reservation *rsv;
310 int ret;
311
312 spin_lock(&mgr->lock);
313
314 list_for_each_entry(rsv, &mgr->reservations_pending, node) {
315 if ((rsv->mm_node.start <= start) &&
316 (start < (rsv->mm_node.start + rsv->mm_node.size))) {
317 ret = -EBUSY;
318 goto out;
319 }
320 }
321
322 list_for_each_entry(rsv, &mgr->reserved_pages, node) {
323 if ((rsv->mm_node.start <= start) &&
324 (start < (rsv->mm_node.start + rsv->mm_node.size))) {
325 ret = 0;
326 goto out;
327 }
328 }
329
330 ret = -ENOENT;
331out:
332 spin_unlock(&mgr->lock);
333 return ret;
334}
335
336/**
337 * amdgpu_vram_mgr_virt_start - update virtual start address
338 *
339 * @mem: ttm_resource to update
340 * @node: just allocated node
341 *
342 * Calculate a virtual BO start address to easily check if everything is CPU
343 * accessible.
344 */
345static void amdgpu_vram_mgr_virt_start(struct ttm_resource *mem,
346 struct drm_mm_node *node)
347{
348 unsigned long start;
349
350 start = node->start + node->size;
351 if (start > mem->num_pages)
352 start -= mem->num_pages;
353 else
354 start = 0;
355 mem->start = max(mem->start, start);
356}
357
358/**
359 * amdgpu_vram_mgr_new - allocate new ranges
360 *
361 * @man: TTM memory type manager
362 * @tbo: TTM BO we need this range for
363 * @place: placement flags and restrictions
364 * @mem: the resulting mem object
365 *
366 * Allocate VRAM for the given BO.
367 */
368static int amdgpu_vram_mgr_new(struct ttm_resource_manager *man,
369 struct ttm_buffer_object *tbo,
370 const struct ttm_place *place,
371 struct ttm_resource **res)
372{
373 unsigned long lpfn, num_nodes, pages_per_node, pages_left, pages;
374 struct amdgpu_vram_mgr *mgr = to_vram_mgr(man);
375 struct amdgpu_device *adev = to_amdgpu_device(mgr);
376 uint64_t vis_usage = 0, mem_bytes, max_bytes;
377 struct ttm_range_mgr_node *node;
378 struct drm_mm *mm = &mgr->mm;
379 enum drm_mm_insert_mode mode;
380 unsigned i;
381 int r;
382
383 lpfn = place->lpfn;
384 if (!lpfn)
385 lpfn = man->size;
386
387 max_bytes = adev->gmc.mc_vram_size;
388 if (tbo->type != ttm_bo_type_kernel)
389 max_bytes -= AMDGPU_VM_RESERVED_VRAM;
390
391 /* bail out quickly if there's likely not enough VRAM for this BO */
392 mem_bytes = tbo->base.size;
393 if (atomic64_add_return(mem_bytes, &mgr->usage) > max_bytes) {
394 r = -ENOSPC;
395 goto error_sub;
396 }
397
398 if (place->flags & TTM_PL_FLAG_CONTIGUOUS) {
399 pages_per_node = ~0ul;
400 num_nodes = 1;
401 } else {
402#ifdef CONFIG_TRANSPARENT_HUGEPAGE
403 pages_per_node = HPAGE_PMD_NR;
404#else
405 /* default to 2MB */
406 pages_per_node = 2UL << (20UL - PAGE_SHIFT);
407#endif
408 pages_per_node = max_t(uint32_t, pages_per_node,
409 tbo->page_alignment);
410 num_nodes = DIV_ROUND_UP_ULL(PFN_UP(mem_bytes), pages_per_node);
411 }
412
413 node = kvmalloc(struct_size(node, mm_nodes, num_nodes),
414 GFP_KERNEL | __GFP_ZERO);
415 if (!node) {
416 r = -ENOMEM;
417 goto error_sub;
418 }
419
420 ttm_resource_init(tbo, place, &node->base);
421
422 mode = DRM_MM_INSERT_BEST;
423 if (place->flags & TTM_PL_FLAG_TOPDOWN)
424 mode = DRM_MM_INSERT_HIGH;
425
426 pages_left = node->base.num_pages;
427
428 /* Limit maximum size to 2GB due to SG table limitations */
429 pages = min(pages_left, 2UL << (30 - PAGE_SHIFT));
430
431 i = 0;
432 spin_lock(&mgr->lock);
433 while (pages_left) {
434 uint32_t alignment = tbo->page_alignment;
435
436 if (pages >= pages_per_node)
437 alignment = pages_per_node;
438
439 r = drm_mm_insert_node_in_range(mm, &node->mm_nodes[i], pages,
440 alignment, 0, place->fpfn,
441 lpfn, mode);
442 if (unlikely(r)) {
443 if (pages > pages_per_node) {
444 if (is_power_of_2(pages))
445 pages = pages / 2;
446 else
447 pages = rounddown_pow_of_two(pages);
448 continue;
449 }
450 goto error_free;
451 }
452
453 vis_usage += amdgpu_vram_mgr_vis_size(adev, &node->mm_nodes[i]);
454 amdgpu_vram_mgr_virt_start(&node->base, &node->mm_nodes[i]);
455 pages_left -= pages;
456 ++i;
457
458 if (pages > pages_left)
459 pages = pages_left;
460 }
461 spin_unlock(&mgr->lock);
462
463 if (i == 1)
464 node->base.placement |= TTM_PL_FLAG_CONTIGUOUS;
465
466 if (adev->gmc.xgmi.connected_to_cpu)
467 node->base.bus.caching = ttm_cached;
468 else
469 node->base.bus.caching = ttm_write_combined;
470
471 atomic64_add(vis_usage, &mgr->vis_usage);
472 *res = &node->base;
473 return 0;
474
475error_free:
476 while (i--)
477 drm_mm_remove_node(&node->mm_nodes[i]);
478 spin_unlock(&mgr->lock);
479 kvfree(node);
480
481error_sub:
482 atomic64_sub(mem_bytes, &mgr->usage);
483 return r;
484}
485
486/**
487 * amdgpu_vram_mgr_del - free ranges
488 *
489 * @man: TTM memory type manager
490 * @mem: TTM memory object
491 *
492 * Free the allocated VRAM again.
493 */
494static void amdgpu_vram_mgr_del(struct ttm_resource_manager *man,
495 struct ttm_resource *res)
496{
497 struct ttm_range_mgr_node *node = to_ttm_range_mgr_node(res);
498 struct amdgpu_vram_mgr *mgr = to_vram_mgr(man);
499 struct amdgpu_device *adev = to_amdgpu_device(mgr);
500 uint64_t usage = 0, vis_usage = 0;
501 unsigned i, pages;
502
503 spin_lock(&mgr->lock);
504 for (i = 0, pages = res->num_pages; pages;
505 pages -= node->mm_nodes[i].size, ++i) {
506 struct drm_mm_node *mm = &node->mm_nodes[i];
507
508 drm_mm_remove_node(mm);
509 usage += mm->size << PAGE_SHIFT;
510 vis_usage += amdgpu_vram_mgr_vis_size(adev, mm);
511 }
512 amdgpu_vram_mgr_do_reserve(man);
513 spin_unlock(&mgr->lock);
514
515 atomic64_sub(usage, &mgr->usage);
516 atomic64_sub(vis_usage, &mgr->vis_usage);
517
518 kvfree(node);
519}
520
521/**
522 * amdgpu_vram_mgr_alloc_sgt - allocate and fill a sg table
523 *
524 * @adev: amdgpu device pointer
525 * @mem: TTM memory object
526 * @offset: byte offset from the base of VRAM BO
527 * @length: number of bytes to export in sg_table
528 * @dev: the other device
529 * @dir: dma direction
530 * @sgt: resulting sg table
531 *
532 * Allocate and fill a sg table from a VRAM allocation.
533 */
534int amdgpu_vram_mgr_alloc_sgt(struct amdgpu_device *adev,
535 struct ttm_resource *res,
536 u64 offset, u64 length,
537 struct device *dev,
538 enum dma_data_direction dir,
539 struct sg_table **sgt)
540{
541 struct amdgpu_res_cursor cursor;
542 struct scatterlist *sg;
543 int num_entries = 0;
544 int i, r;
545
546 *sgt = kmalloc(sizeof(**sgt), GFP_KERNEL);
547 if (!*sgt)
548 return -ENOMEM;
549
550 /* Determine the number of DRM_MM nodes to export */
551 amdgpu_res_first(res, offset, length, &cursor);
552 while (cursor.remaining) {
553 num_entries++;
554 amdgpu_res_next(&cursor, cursor.size);
555 }
556
557 r = sg_alloc_table(*sgt, num_entries, GFP_KERNEL);
558 if (r)
559 goto error_free;
560
561 /* Initialize scatterlist nodes of sg_table */
562 for_each_sgtable_sg((*sgt), sg, i)
563 sg->length = 0;
564
565 /*
566 * Walk down DRM_MM nodes to populate scatterlist nodes
567 * @note: Use iterator api to get first the DRM_MM node
568 * and the number of bytes from it. Access the following
569 * DRM_MM node(s) if more buffer needs to exported
570 */
571 amdgpu_res_first(res, offset, length, &cursor);
572 for_each_sgtable_sg((*sgt), sg, i) {
573 phys_addr_t phys = cursor.start + adev->gmc.aper_base;
574 size_t size = cursor.size;
575 dma_addr_t addr;
576
577 addr = dma_map_resource(dev, phys, size, dir,
578 DMA_ATTR_SKIP_CPU_SYNC);
579 r = dma_mapping_error(dev, addr);
580 if (r)
581 goto error_unmap;
582
583 sg_set_page(sg, NULL, size, 0);
584 sg_dma_address(sg) = addr;
585 sg_dma_len(sg) = size;
586
587 amdgpu_res_next(&cursor, cursor.size);
588 }
589
590 return 0;
591
592error_unmap:
593 for_each_sgtable_sg((*sgt), sg, i) {
594 if (!sg->length)
595 continue;
596
597 dma_unmap_resource(dev, sg->dma_address,
598 sg->length, dir,
599 DMA_ATTR_SKIP_CPU_SYNC);
600 }
601 sg_free_table(*sgt);
602
603error_free:
604 kfree(*sgt);
605 return r;
606}
607
608/**
609 * amdgpu_vram_mgr_free_sgt - allocate and fill a sg table
610 *
611 * @dev: device pointer
612 * @dir: data direction of resource to unmap
613 * @sgt: sg table to free
614 *
615 * Free a previously allocate sg table.
616 */
617void amdgpu_vram_mgr_free_sgt(struct device *dev,
618 enum dma_data_direction dir,
619 struct sg_table *sgt)
620{
621 struct scatterlist *sg;
622 int i;
623
624 for_each_sgtable_sg(sgt, sg, i)
625 dma_unmap_resource(dev, sg->dma_address,
626 sg->length, dir,
627 DMA_ATTR_SKIP_CPU_SYNC);
628 sg_free_table(sgt);
629 kfree(sgt);
630}
631
632/**
633 * amdgpu_vram_mgr_usage - how many bytes are used in this domain
634 *
635 * @man: TTM memory type manager
636 *
637 * Returns how many bytes are used in this domain.
638 */
639uint64_t amdgpu_vram_mgr_usage(struct ttm_resource_manager *man)
640{
641 struct amdgpu_vram_mgr *mgr = to_vram_mgr(man);
642
643 return atomic64_read(&mgr->usage);
644}
645
646/**
647 * amdgpu_vram_mgr_vis_usage - how many bytes are used in the visible part
648 *
649 * @man: TTM memory type manager
650 *
651 * Returns how many bytes are used in the visible part of VRAM
652 */
653uint64_t amdgpu_vram_mgr_vis_usage(struct ttm_resource_manager *man)
654{
655 struct amdgpu_vram_mgr *mgr = to_vram_mgr(man);
656
657 return atomic64_read(&mgr->vis_usage);
658}
659
660/**
661 * amdgpu_vram_mgr_debug - dump VRAM table
662 *
663 * @man: TTM memory type manager
664 * @printer: DRM printer to use
665 *
666 * Dump the table content using printk.
667 */
668static void amdgpu_vram_mgr_debug(struct ttm_resource_manager *man,
669 struct drm_printer *printer)
670{
671 struct amdgpu_vram_mgr *mgr = to_vram_mgr(man);
672
673 spin_lock(&mgr->lock);
674 drm_mm_print(&mgr->mm, printer);
675 spin_unlock(&mgr->lock);
676
677 drm_printf(printer, "man size:%llu pages, ram usage:%lluMB, vis usage:%lluMB\n",
678 man->size, amdgpu_vram_mgr_usage(man) >> 20,
679 amdgpu_vram_mgr_vis_usage(man) >> 20);
680}
681
682static const struct ttm_resource_manager_func amdgpu_vram_mgr_func = {
683 .alloc = amdgpu_vram_mgr_new,
684 .free = amdgpu_vram_mgr_del,
685 .debug = amdgpu_vram_mgr_debug
686};
687
688/**
689 * amdgpu_vram_mgr_init - init VRAM manager and DRM MM
690 *
691 * @adev: amdgpu_device pointer
692 *
693 * Allocate and initialize the VRAM manager.
694 */
695int amdgpu_vram_mgr_init(struct amdgpu_device *adev)
696{
697 struct amdgpu_vram_mgr *mgr = &adev->mman.vram_mgr;
698 struct ttm_resource_manager *man = &mgr->manager;
699
700 ttm_resource_manager_init(man, adev->gmc.real_vram_size >> PAGE_SHIFT);
701
702 man->func = &amdgpu_vram_mgr_func;
703
704 drm_mm_init(&mgr->mm, 0, man->size);
705 spin_lock_init(&mgr->lock);
706 INIT_LIST_HEAD(&mgr->reservations_pending);
707 INIT_LIST_HEAD(&mgr->reserved_pages);
708
709 ttm_set_driver_manager(&adev->mman.bdev, TTM_PL_VRAM, &mgr->manager);
710 ttm_resource_manager_set_used(man, true);
711 return 0;
712}
713
714/**
715 * amdgpu_vram_mgr_fini - free and destroy VRAM manager
716 *
717 * @adev: amdgpu_device pointer
718 *
719 * Destroy and free the VRAM manager, returns -EBUSY if ranges are still
720 * allocated inside it.
721 */
722void amdgpu_vram_mgr_fini(struct amdgpu_device *adev)
723{
724 struct amdgpu_vram_mgr *mgr = &adev->mman.vram_mgr;
725 struct ttm_resource_manager *man = &mgr->manager;
726 int ret;
727 struct amdgpu_vram_reservation *rsv, *temp;
728
729 ttm_resource_manager_set_used(man, false);
730
731 ret = ttm_resource_manager_evict_all(&adev->mman.bdev, man);
732 if (ret)
733 return;
734
735 spin_lock(&mgr->lock);
736 list_for_each_entry_safe(rsv, temp, &mgr->reservations_pending, node)
737 kfree(rsv);
738
739 list_for_each_entry_safe(rsv, temp, &mgr->reserved_pages, node) {
740 drm_mm_remove_node(&rsv->mm_node);
741 kfree(rsv);
742 }
743 drm_mm_takedown(&mgr->mm);
744 spin_unlock(&mgr->lock);
745
746 ttm_resource_manager_cleanup(man);
747 ttm_set_driver_manager(&adev->mman.bdev, TTM_PL_VRAM, NULL);
748}