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
 80
 
 
 
 
 
 
 81
 82/**
 83 * DOC: mem_info_vram_total
 84 *
 85 * The amdgpu driver provides a sysfs API for reporting current total VRAM
 86 * available on the device
 87 * The file mem_info_vram_total is used for this and returns the total
 88 * amount of VRAM in bytes
 89 */
 90static ssize_t amdgpu_mem_info_vram_total_show(struct device *dev,
 91		struct device_attribute *attr, char *buf)
 92{
 93	struct drm_device *ddev = dev_get_drvdata(dev);
 94	struct amdgpu_device *adev = drm_to_adev(ddev);
 95
 96	return sysfs_emit(buf, "%llu\n", adev->gmc.real_vram_size);
 97}
 98
 99/**
100 * DOC: mem_info_vis_vram_total
101 *
102 * The amdgpu driver provides a sysfs API for reporting current total
103 * visible VRAM available on the device
104 * The file mem_info_vis_vram_total is used for this and returns the total
105 * amount of visible VRAM in bytes
106 */
107static ssize_t amdgpu_mem_info_vis_vram_total_show(struct device *dev,
108		struct device_attribute *attr, char *buf)
109{
110	struct drm_device *ddev = dev_get_drvdata(dev);
111	struct amdgpu_device *adev = drm_to_adev(ddev);
112
113	return sysfs_emit(buf, "%llu\n", adev->gmc.visible_vram_size);
114}
115
116/**
117 * DOC: mem_info_vram_used
118 *
119 * The amdgpu driver provides a sysfs API for reporting current total VRAM
120 * available on the device
121 * The file mem_info_vram_used is used for this and returns the total
122 * amount of currently used VRAM in bytes
123 */
124static ssize_t amdgpu_mem_info_vram_used_show(struct device *dev,
125					      struct device_attribute *attr,
126					      char *buf)
127{
128	struct drm_device *ddev = dev_get_drvdata(dev);
129	struct amdgpu_device *adev = drm_to_adev(ddev);
130	struct ttm_resource_manager *man = &adev->mman.vram_mgr.manager;
131
132	return sysfs_emit(buf, "%llu\n", ttm_resource_manager_usage(man));
 
133}
134
135/**
136 * DOC: mem_info_vis_vram_used
137 *
138 * The amdgpu driver provides a sysfs API for reporting current total of
139 * used visible VRAM
140 * The file mem_info_vis_vram_used is used for this and returns the total
141 * amount of currently used visible VRAM in bytes
142 */
143static ssize_t amdgpu_mem_info_vis_vram_used_show(struct device *dev,
144						  struct device_attribute *attr,
145						  char *buf)
146{
147	struct drm_device *ddev = dev_get_drvdata(dev);
148	struct amdgpu_device *adev = drm_to_adev(ddev);
149
150	return sysfs_emit(buf, "%llu\n",
151			  amdgpu_vram_mgr_vis_usage(&adev->mman.vram_mgr));
152}
153
154/**
155 * DOC: mem_info_vram_vendor
156 *
157 * The amdgpu driver provides a sysfs API for reporting the vendor of the
158 * installed VRAM
159 * The file mem_info_vram_vendor is used for this and returns the name of the
160 * vendor.
161 */
162static ssize_t amdgpu_mem_info_vram_vendor(struct device *dev,
163					   struct device_attribute *attr,
164					   char *buf)
165{
166	struct drm_device *ddev = dev_get_drvdata(dev);
167	struct amdgpu_device *adev = drm_to_adev(ddev);
168
169	switch (adev->gmc.vram_vendor) {
170	case SAMSUNG:
171		return sysfs_emit(buf, "samsung\n");
172	case INFINEON:
173		return sysfs_emit(buf, "infineon\n");
174	case ELPIDA:
175		return sysfs_emit(buf, "elpida\n");
176	case ETRON:
177		return sysfs_emit(buf, "etron\n");
178	case NANYA:
179		return sysfs_emit(buf, "nanya\n");
180	case HYNIX:
181		return sysfs_emit(buf, "hynix\n");
182	case MOSEL:
183		return sysfs_emit(buf, "mosel\n");
184	case WINBOND:
185		return sysfs_emit(buf, "winbond\n");
186	case ESMT:
187		return sysfs_emit(buf, "esmt\n");
188	case MICRON:
189		return sysfs_emit(buf, "micron\n");
190	default:
191		return sysfs_emit(buf, "unknown\n");
192	}
193}
194
195static DEVICE_ATTR(mem_info_vram_total, S_IRUGO,
196		   amdgpu_mem_info_vram_total_show, NULL);
197static DEVICE_ATTR(mem_info_vis_vram_total, S_IRUGO,
198		   amdgpu_mem_info_vis_vram_total_show,NULL);
199static DEVICE_ATTR(mem_info_vram_used, S_IRUGO,
200		   amdgpu_mem_info_vram_used_show, NULL);
201static DEVICE_ATTR(mem_info_vis_vram_used, S_IRUGO,
202		   amdgpu_mem_info_vis_vram_used_show, NULL);
203static DEVICE_ATTR(mem_info_vram_vendor, S_IRUGO,
204		   amdgpu_mem_info_vram_vendor, NULL);
205
206static struct attribute *amdgpu_vram_mgr_attributes[] = {
207	&dev_attr_mem_info_vram_total.attr,
208	&dev_attr_mem_info_vis_vram_total.attr,
209	&dev_attr_mem_info_vram_used.attr,
210	&dev_attr_mem_info_vis_vram_used.attr,
211	&dev_attr_mem_info_vram_vendor.attr,
212	NULL
213};
 
 
 
 
 
 
214
215const struct attribute_group amdgpu_vram_mgr_attr_group = {
216	.attrs = amdgpu_vram_mgr_attributes
217};
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
218
219/**
220 * amdgpu_vram_mgr_vis_size - Calculate visible block size
221 *
222 * @adev: amdgpu_device pointer
223 * @block: DRM BUDDY block structure
224 *
225 * Calculate how many bytes of the DRM BUDDY block are inside visible VRAM
226 */
227static u64 amdgpu_vram_mgr_vis_size(struct amdgpu_device *adev,
228				    struct drm_buddy_block *block)
229{
230	u64 start = amdgpu_vram_mgr_block_start(block);
231	u64 end = start + amdgpu_vram_mgr_block_size(block);
232
233	if (start >= adev->gmc.visible_vram_size)
234		return 0;
235
236	return (end > adev->gmc.visible_vram_size ?
237		adev->gmc.visible_vram_size : end) - start;
238}
239
240/**
241 * amdgpu_vram_mgr_bo_visible_size - CPU visible BO size
242 *
243 * @bo: &amdgpu_bo buffer object (must be in VRAM)
244 *
245 * Returns:
246 * How much of the given &amdgpu_bo buffer object lies in CPU visible VRAM.
247 */
248u64 amdgpu_vram_mgr_bo_visible_size(struct amdgpu_bo *bo)
249{
250	struct amdgpu_device *adev = amdgpu_ttm_adev(bo->tbo.bdev);
251	struct ttm_resource *res = bo->tbo.resource;
252	struct amdgpu_vram_mgr_resource *vres = to_amdgpu_vram_mgr_resource(res);
253	struct drm_buddy_block *block;
254	u64 usage = 0;
255
256	if (amdgpu_gmc_vram_full_visible(&adev->gmc))
257		return amdgpu_bo_size(bo);
258
259	if (res->start >= adev->gmc.visible_vram_size >> PAGE_SHIFT)
260		return 0;
261
262	list_for_each_entry(block, &vres->blocks, link)
263		usage += amdgpu_vram_mgr_vis_size(adev, block);
264
265	return usage;
266}
267
268/* Commit the reservation of VRAM pages */
269static void amdgpu_vram_mgr_do_reserve(struct ttm_resource_manager *man)
270{
271	struct amdgpu_vram_mgr *mgr = to_vram_mgr(man);
272	struct amdgpu_device *adev = to_amdgpu_device(mgr);
273	struct drm_buddy *mm = &mgr->mm;
274	struct amdgpu_vram_reservation *rsv, *temp;
275	struct drm_buddy_block *block;
276	uint64_t vis_usage;
277
278	list_for_each_entry_safe(rsv, temp, &mgr->reservations_pending, blocks) {
279		if (drm_buddy_alloc_blocks(mm, rsv->start, rsv->start + rsv->size,
280					   rsv->size, mm->chunk_size, &rsv->allocated,
281					   DRM_BUDDY_RANGE_ALLOCATION))
282			continue;
283
284		block = amdgpu_vram_mgr_first_block(&rsv->allocated);
285		if (!block)
286			continue;
287
288		dev_dbg(adev->dev, "Reservation 0x%llx - %lld, Succeeded\n",
289			rsv->start, rsv->size);
290
291		vis_usage = amdgpu_vram_mgr_vis_size(adev, block);
292		atomic64_add(vis_usage, &mgr->vis_usage);
293		spin_lock(&man->bdev->lru_lock);
294		man->usage += rsv->size;
295		spin_unlock(&man->bdev->lru_lock);
296		list_move(&rsv->blocks, &mgr->reserved_pages);
297	}
298}
299
300/**
301 * amdgpu_vram_mgr_reserve_range - Reserve a range from VRAM
302 *
303 * @mgr: amdgpu_vram_mgr pointer
304 * @start: start address of the range in VRAM
305 * @size: size of the range
306 *
307 * Reserve memory from start address with the specified size in VRAM
 
308 */
309int amdgpu_vram_mgr_reserve_range(struct amdgpu_vram_mgr *mgr,
310				  uint64_t start, uint64_t size)
311{
312	struct amdgpu_vram_reservation *rsv;
313
314	rsv = kzalloc(sizeof(*rsv), GFP_KERNEL);
315	if (!rsv)
316		return -ENOMEM;
317
318	INIT_LIST_HEAD(&rsv->allocated);
319	INIT_LIST_HEAD(&rsv->blocks);
320
321	rsv->start = start;
322	rsv->size = size;
323
324	mutex_lock(&mgr->lock);
325	list_add_tail(&rsv->blocks, &mgr->reservations_pending);
326	amdgpu_vram_mgr_do_reserve(&mgr->manager);
327	mutex_unlock(&mgr->lock);
328
329	return 0;
330}
331
332/**
333 * amdgpu_vram_mgr_query_page_status - query the reservation status
334 *
335 * @mgr: amdgpu_vram_mgr pointer
336 * @start: start address of a page in VRAM
337 *
338 * Returns:
339 *	-EBUSY: the page is still hold and in pending list
340 *	0: the page has been reserved
341 *	-ENOENT: the input page is not a reservation
342 */
343int amdgpu_vram_mgr_query_page_status(struct amdgpu_vram_mgr *mgr,
344				      uint64_t start)
345{
346	struct amdgpu_vram_reservation *rsv;
347	int ret;
348
349	mutex_lock(&mgr->lock);
350
351	list_for_each_entry(rsv, &mgr->reservations_pending, blocks) {
352		if (rsv->start <= start &&
353		    (start < (rsv->start + rsv->size))) {
354			ret = -EBUSY;
355			goto out;
356		}
357	}
358
359	list_for_each_entry(rsv, &mgr->reserved_pages, blocks) {
360		if (rsv->start <= start &&
361		    (start < (rsv->start + rsv->size))) {
362			ret = 0;
363			goto out;
364		}
365	}
366
367	ret = -ENOENT;
368out:
369	mutex_unlock(&mgr->lock);
370	return ret;
371}
372
373/**
374 * amdgpu_vram_mgr_new - allocate new ranges
375 *
376 * @man: TTM memory type manager
377 * @tbo: TTM BO we need this range for
378 * @place: placement flags and restrictions
379 * @res: the resulting mem object
380 *
381 * Allocate VRAM for the given BO.
382 */
383static int amdgpu_vram_mgr_new(struct ttm_resource_manager *man,
384			       struct ttm_buffer_object *tbo,
385			       const struct ttm_place *place,
386			       struct ttm_resource **res)
387{
388	u64 vis_usage = 0, max_bytes, cur_size, min_block_size;
389	struct amdgpu_vram_mgr *mgr = to_vram_mgr(man);
390	struct amdgpu_device *adev = to_amdgpu_device(mgr);
391	struct amdgpu_vram_mgr_resource *vres;
392	u64 size, remaining_size, lpfn, fpfn;
393	struct drm_buddy *mm = &mgr->mm;
394	struct drm_buddy_block *block;
395	unsigned long pages_per_block;
396	int r;
397
398	lpfn = (u64)place->lpfn << PAGE_SHIFT;
399	if (!lpfn)
400		lpfn = man->size;
401
402	fpfn = (u64)place->fpfn << PAGE_SHIFT;
403
404	max_bytes = adev->gmc.mc_vram_size;
405	if (tbo->type != ttm_bo_type_kernel)
406		max_bytes -= AMDGPU_VM_RESERVED_VRAM;
 
 
407
408	if (place->flags & TTM_PL_FLAG_CONTIGUOUS) {
409		pages_per_block = ~0ul;
 
410	} else {
411#ifdef CONFIG_TRANSPARENT_HUGEPAGE
412		pages_per_block = HPAGE_PMD_NR;
413#else
414		/* default to 2MB */
415		pages_per_block = 2UL << (20UL - PAGE_SHIFT);
416#endif
417		pages_per_block = max_t(uint32_t, pages_per_block,
418					tbo->page_alignment);
419	}
420
421	vres = kzalloc(sizeof(*vres), GFP_KERNEL);
422	if (!vres)
 
 
423		return -ENOMEM;
424
425	ttm_resource_init(tbo, place, &vres->base);
426
427	/* bail out quickly if there's likely not enough VRAM for this BO */
428	if (ttm_resource_manager_usage(man) > max_bytes) {
429		r = -ENOSPC;
430		goto error_fini;
431	}
432
433	INIT_LIST_HEAD(&vres->blocks);
434
435	if (place->flags & TTM_PL_FLAG_TOPDOWN)
436		vres->flags |= DRM_BUDDY_TOPDOWN_ALLOCATION;
 
 
 
437
438	if (fpfn || lpfn != mgr->mm.size)
439		/* Allocate blocks in desired range */
440		vres->flags |= DRM_BUDDY_RANGE_ALLOCATION;
441
442	remaining_size = (u64)vres->base.size;
443
444	mutex_lock(&mgr->lock);
445	while (remaining_size) {
446		if (tbo->page_alignment)
447			min_block_size = (u64)tbo->page_alignment << PAGE_SHIFT;
448		else
449			min_block_size = mgr->default_page_size;
450
451		BUG_ON(min_block_size < mm->chunk_size);
452
453		/* Limit maximum size to 2GiB due to SG table limitations */
454		size = min(remaining_size, 2ULL << 30);
455
456		if (size >= (u64)pages_per_block << PAGE_SHIFT)
457			min_block_size = (u64)pages_per_block << PAGE_SHIFT;
458
459		cur_size = size;
460
461		if (fpfn + size != (u64)place->lpfn << PAGE_SHIFT) {
462			/*
463			 * Except for actual range allocation, modify the size and
464			 * min_block_size conforming to continuous flag enablement
465			 */
466			if (place->flags & TTM_PL_FLAG_CONTIGUOUS) {
467				size = roundup_pow_of_two(size);
468				min_block_size = size;
469			/*
470			 * Modify the size value if size is not
471			 * aligned with min_block_size
472			 */
473			} else if (!IS_ALIGNED(size, min_block_size)) {
474				size = round_up(size, min_block_size);
475			}
476		}
477
478		r = drm_buddy_alloc_blocks(mm, fpfn,
479					   lpfn,
480					   size,
481					   min_block_size,
482					   &vres->blocks,
483					   vres->flags);
484		if (unlikely(r))
485			goto error_free_blocks;
486
487		if (size > remaining_size)
488			remaining_size = 0;
489		else
490			remaining_size -= size;
491	}
492	mutex_unlock(&mgr->lock);
493
494	if (cur_size != size) {
495		struct drm_buddy_block *block;
496		struct list_head *trim_list;
497		u64 original_size;
498		LIST_HEAD(temp);
499
500		trim_list = &vres->blocks;
501		original_size = (u64)vres->base.size;
502
503		/*
504		 * If size value is rounded up to min_block_size, trim the last
505		 * block to the required size
506		 */
507		if (!list_is_singular(&vres->blocks)) {
508			block = list_last_entry(&vres->blocks, typeof(*block), link);
509			list_move_tail(&block->link, &temp);
510			trim_list = &temp;
511			/*
512			 * Compute the original_size value by subtracting the
513			 * last block size with (aligned size - original size)
514			 */
515			original_size = amdgpu_vram_mgr_block_size(block) - (size - cur_size);
516		}
517
518		mutex_lock(&mgr->lock);
519		drm_buddy_block_trim(mm,
520				     original_size,
521				     trim_list);
522		mutex_unlock(&mgr->lock);
523
524		if (!list_empty(&temp))
525			list_splice_tail(trim_list, &vres->blocks);
526	}
527
528	vres->base.start = 0;
529	list_for_each_entry(block, &vres->blocks, link) {
530		unsigned long start;
531
532		start = amdgpu_vram_mgr_block_start(block) +
533			amdgpu_vram_mgr_block_size(block);
534		start >>= PAGE_SHIFT;
535
536		if (start > PFN_UP(vres->base.size))
537			start -= PFN_UP(vres->base.size);
538		else
539			start = 0;
540		vres->base.start = max(vres->base.start, start);
541
542		vis_usage += amdgpu_vram_mgr_vis_size(adev, block);
 
 
543	}
 
544
545	if (amdgpu_is_vram_mgr_blocks_contiguous(&vres->blocks))
546		vres->base.placement |= TTM_PL_FLAG_CONTIGUOUS;
547
548	if (adev->gmc.xgmi.connected_to_cpu)
549		vres->base.bus.caching = ttm_cached;
550	else
551		vres->base.bus.caching = ttm_write_combined;
552
553	atomic64_add(vis_usage, &mgr->vis_usage);
554	*res = &vres->base;
555	return 0;
556
557error_free_blocks:
558	drm_buddy_free_list(mm, &vres->blocks);
559	mutex_unlock(&mgr->lock);
560error_fini:
561	ttm_resource_fini(man, &vres->base);
562	kfree(vres);
563
564	return r;
 
565}
566
567/**
568 * amdgpu_vram_mgr_del - free ranges
569 *
570 * @man: TTM memory type manager
571 * @res: TTM memory object
 
 
572 *
573 * Free the allocated VRAM again.
574 */
575static void amdgpu_vram_mgr_del(struct ttm_resource_manager *man,
576				struct ttm_resource *res)
577{
578	struct amdgpu_vram_mgr_resource *vres = to_amdgpu_vram_mgr_resource(res);
579	struct amdgpu_vram_mgr *mgr = to_vram_mgr(man);
580	struct amdgpu_device *adev = to_amdgpu_device(mgr);
581	struct drm_buddy *mm = &mgr->mm;
582	struct drm_buddy_block *block;
583	uint64_t vis_usage = 0;
584
585	mutex_lock(&mgr->lock);
586	list_for_each_entry(block, &vres->blocks, link)
587		vis_usage += amdgpu_vram_mgr_vis_size(adev, block);
588
589	amdgpu_vram_mgr_do_reserve(man);
590
591	drm_buddy_free_list(mm, &vres->blocks);
592	mutex_unlock(&mgr->lock);
593
594	atomic64_sub(vis_usage, &mgr->vis_usage);
595
596	ttm_resource_fini(man, res);
597	kfree(vres);
598}
599
600/**
601 * amdgpu_vram_mgr_alloc_sgt - allocate and fill a sg table
602 *
603 * @adev: amdgpu device pointer
604 * @res: TTM memory object
605 * @offset: byte offset from the base of VRAM BO
606 * @length: number of bytes to export in sg_table
607 * @dev: the other device
608 * @dir: dma direction
609 * @sgt: resulting sg table
610 *
611 * Allocate and fill a sg table from a VRAM allocation.
612 */
613int amdgpu_vram_mgr_alloc_sgt(struct amdgpu_device *adev,
614			      struct ttm_resource *res,
615			      u64 offset, u64 length,
616			      struct device *dev,
617			      enum dma_data_direction dir,
618			      struct sg_table **sgt)
619{
620	struct amdgpu_res_cursor cursor;
621	struct scatterlist *sg;
622	int num_entries = 0;
623	int i, r;
 
624
625	*sgt = kmalloc(sizeof(**sgt), GFP_KERNEL);
626	if (!*sgt)
627		return -ENOMEM;
628
629	/* Determine the number of DRM_BUDDY blocks to export */
630	amdgpu_res_first(res, offset, length, &cursor);
631	while (cursor.remaining) {
632		num_entries++;
633		amdgpu_res_next(&cursor, cursor.size);
634	}
635
636	r = sg_alloc_table(*sgt, num_entries, GFP_KERNEL);
637	if (r)
638		goto error_free;
639
640	/* Initialize scatterlist nodes of sg_table */
641	for_each_sgtable_sg((*sgt), sg, i)
642		sg->length = 0;
643
644	/*
645	 * Walk down DRM_BUDDY blocks to populate scatterlist nodes
646	 * @note: Use iterator api to get first the DRM_BUDDY block
647	 * and the number of bytes from it. Access the following
648	 * DRM_BUDDY block(s) if more buffer needs to exported
649	 */
650	amdgpu_res_first(res, offset, length, &cursor);
651	for_each_sgtable_sg((*sgt), sg, i) {
652		phys_addr_t phys = cursor.start + adev->gmc.aper_base;
653		size_t size = cursor.size;
654		dma_addr_t addr;
655
656		addr = dma_map_resource(dev, phys, size, dir,
657					DMA_ATTR_SKIP_CPU_SYNC);
658		r = dma_mapping_error(dev, addr);
659		if (r)
660			goto error_unmap;
661
662		sg_set_page(sg, NULL, size, 0);
663		sg_dma_address(sg) = addr;
664		sg_dma_len(sg) = size;
665
666		amdgpu_res_next(&cursor, cursor.size);
 
 
 
 
 
 
667	}
 
668
669	return 0;
670
671error_unmap:
672	for_each_sgtable_sg((*sgt), sg, i) {
673		if (!sg->length)
674			continue;
675
676		dma_unmap_resource(dev, sg->dma_address,
677				   sg->length, dir,
678				   DMA_ATTR_SKIP_CPU_SYNC);
679	}
680	sg_free_table(*sgt);
681
682error_free:
683	kfree(*sgt);
684	return r;
685}
686
687/**
688 * amdgpu_vram_mgr_free_sgt - allocate and fill a sg table
689 *
690 * @dev: device pointer
691 * @dir: data direction of resource to unmap
692 * @sgt: sg table to free
693 *
694 * Free a previously allocate sg table.
695 */
696void amdgpu_vram_mgr_free_sgt(struct device *dev,
697			      enum dma_data_direction dir,
698			      struct sg_table *sgt)
699{
700	struct scatterlist *sg;
701	int i;
702
703	for_each_sgtable_sg(sgt, sg, i)
704		dma_unmap_resource(dev, sg->dma_address,
705				   sg->length, dir,
706				   DMA_ATTR_SKIP_CPU_SYNC);
707	sg_free_table(sgt);
708	kfree(sgt);
709}
710
711/**
712 * amdgpu_vram_mgr_vis_usage - how many bytes are used in the visible part
713 *
714 * @mgr: amdgpu_vram_mgr pointer
715 *
716 * Returns how many bytes are used in the visible part of VRAM
717 */
718uint64_t amdgpu_vram_mgr_vis_usage(struct amdgpu_vram_mgr *mgr)
719{
720	return atomic64_read(&mgr->vis_usage);
721}
722
723/**
724 * amdgpu_vram_mgr_intersects - test each drm buddy block for intersection
725 *
726 * @man: TTM memory type manager
727 * @res: The resource to test
728 * @place: The place to test against
729 * @size: Size of the new allocation
730 *
731 * Test each drm buddy block for intersection for eviction decision.
732 */
733static bool amdgpu_vram_mgr_intersects(struct ttm_resource_manager *man,
734				       struct ttm_resource *res,
735				       const struct ttm_place *place,
736				       size_t size)
737{
738	struct amdgpu_vram_mgr_resource *mgr = to_amdgpu_vram_mgr_resource(res);
739	struct drm_buddy_block *block;
740
741	/* Check each drm buddy block individually */
742	list_for_each_entry(block, &mgr->blocks, link) {
743		unsigned long fpfn =
744			amdgpu_vram_mgr_block_start(block) >> PAGE_SHIFT;
745		unsigned long lpfn = fpfn +
746			(amdgpu_vram_mgr_block_size(block) >> PAGE_SHIFT);
747
748		if (place->fpfn < lpfn &&
749		    (!place->lpfn || place->lpfn > fpfn))
750			return true;
751	}
752
753	return false;
754}
755
756/**
757 * amdgpu_vram_mgr_compatible - test each drm buddy block for compatibility
758 *
759 * @man: TTM memory type manager
760 * @res: The resource to test
761 * @place: The place to test against
762 * @size: Size of the new allocation
763 *
764 * Test each drm buddy block for placement compatibility.
765 */
766static bool amdgpu_vram_mgr_compatible(struct ttm_resource_manager *man,
767				       struct ttm_resource *res,
768				       const struct ttm_place *place,
769				       size_t size)
770{
771	struct amdgpu_vram_mgr_resource *mgr = to_amdgpu_vram_mgr_resource(res);
772	struct drm_buddy_block *block;
773
774	/* Check each drm buddy block individually */
775	list_for_each_entry(block, &mgr->blocks, link) {
776		unsigned long fpfn =
777			amdgpu_vram_mgr_block_start(block) >> PAGE_SHIFT;
778		unsigned long lpfn = fpfn +
779			(amdgpu_vram_mgr_block_size(block) >> PAGE_SHIFT);
780
781		if (fpfn < place->fpfn ||
782		    (place->lpfn && lpfn > place->lpfn))
783			return false;
784	}
785
786	return true;
787}
788
789/**
790 * amdgpu_vram_mgr_debug - dump VRAM table
791 *
792 * @man: TTM memory type manager
793 * @printer: DRM printer to use
794 *
795 * Dump the table content using printk.
796 */
797static void amdgpu_vram_mgr_debug(struct ttm_resource_manager *man,
798				  struct drm_printer *printer)
799{
800	struct amdgpu_vram_mgr *mgr = to_vram_mgr(man);
801	struct drm_buddy *mm = &mgr->mm;
802	struct drm_buddy_block *block;
803
804	drm_printf(printer, "  vis usage:%llu\n",
805		   amdgpu_vram_mgr_vis_usage(mgr));
806
807	mutex_lock(&mgr->lock);
808	drm_printf(printer, "default_page_size: %lluKiB\n",
809		   mgr->default_page_size >> 10);
810
811	drm_buddy_print(mm, printer);
812
813	drm_printf(printer, "reserved:\n");
814	list_for_each_entry(block, &mgr->reserved_pages, link)
815		drm_buddy_block_print(mm, block, printer);
816	mutex_unlock(&mgr->lock);
817}
818
819static const struct ttm_resource_manager_func amdgpu_vram_mgr_func = {
820	.alloc	= amdgpu_vram_mgr_new,
821	.free	= amdgpu_vram_mgr_del,
822	.intersects = amdgpu_vram_mgr_intersects,
823	.compatible = amdgpu_vram_mgr_compatible,
824	.debug	= amdgpu_vram_mgr_debug
825};
826
827/**
828 * amdgpu_vram_mgr_init - init VRAM manager and DRM MM
829 *
830 * @adev: amdgpu_device pointer
831 *
832 * Allocate and initialize the VRAM manager.
833 */
834int amdgpu_vram_mgr_init(struct amdgpu_device *adev)
835{
836	struct amdgpu_vram_mgr *mgr = &adev->mman.vram_mgr;
837	struct ttm_resource_manager *man = &mgr->manager;
838	int err;
839
840	ttm_resource_manager_init(man, &adev->mman.bdev,
841				  adev->gmc.real_vram_size);
842
843	man->func = &amdgpu_vram_mgr_func;
844
845	err = drm_buddy_init(&mgr->mm, man->size, PAGE_SIZE);
846	if (err)
847		return err;
848
849	mutex_init(&mgr->lock);
850	INIT_LIST_HEAD(&mgr->reservations_pending);
851	INIT_LIST_HEAD(&mgr->reserved_pages);
852	mgr->default_page_size = PAGE_SIZE;
853
854	ttm_set_driver_manager(&adev->mman.bdev, TTM_PL_VRAM, &mgr->manager);
855	ttm_resource_manager_set_used(man, true);
856	return 0;
857}
858
859/**
860 * amdgpu_vram_mgr_fini - free and destroy VRAM manager
861 *
862 * @adev: amdgpu_device pointer
863 *
864 * Destroy and free the VRAM manager, returns -EBUSY if ranges are still
865 * allocated inside it.
866 */
867void amdgpu_vram_mgr_fini(struct amdgpu_device *adev)
868{
869	struct amdgpu_vram_mgr *mgr = &adev->mman.vram_mgr;
870	struct ttm_resource_manager *man = &mgr->manager;
871	int ret;
872	struct amdgpu_vram_reservation *rsv, *temp;
873
874	ttm_resource_manager_set_used(man, false);
875
876	ret = ttm_resource_manager_evict_all(&adev->mman.bdev, man);
877	if (ret)
878		return;
879
880	mutex_lock(&mgr->lock);
881	list_for_each_entry_safe(rsv, temp, &mgr->reservations_pending, blocks)
882		kfree(rsv);
883
884	list_for_each_entry_safe(rsv, temp, &mgr->reserved_pages, blocks) {
885		drm_buddy_free_list(&mgr->mm, &rsv->allocated);
886		kfree(rsv);
887	}
888	drm_buddy_fini(&mgr->mm);
889	mutex_unlock(&mgr->lock);
890
891	ttm_resource_manager_cleanup(man);
892	ttm_set_driver_manager(&adev->mman.bdev, TTM_PL_VRAM, NULL);
893}