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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
33#include <linux/debugfs.h>
34#include <linux/dma-mapping.h>
35#include <linux/pagemap.h>
36#include <linux/pci.h>
37#include <linux/seq_file.h>
38#include <linux/slab.h>
39#include <linux/swap.h>
40
41#include <drm/drm_device.h>
42#include <drm/drm_file.h>
43#include <drm/drm_prime.h>
44#include <drm/radeon_drm.h>
45#include <drm/ttm/ttm_bo.h>
46#include <drm/ttm/ttm_placement.h>
47#include <drm/ttm/ttm_range_manager.h>
48#include <drm/ttm/ttm_tt.h>
49
50#include "radeon_reg.h"
51#include "radeon.h"
52#include "radeon_ttm.h"
53
54static void radeon_ttm_debugfs_init(struct radeon_device *rdev);
55
56static int radeon_ttm_tt_bind(struct ttm_device *bdev, struct ttm_tt *ttm,
57 struct ttm_resource *bo_mem);
58static void radeon_ttm_tt_unbind(struct ttm_device *bdev, struct ttm_tt *ttm);
59
60struct radeon_device *radeon_get_rdev(struct ttm_device *bdev)
61{
62 struct radeon_mman *mman;
63 struct radeon_device *rdev;
64
65 mman = container_of(bdev, struct radeon_mman, bdev);
66 rdev = container_of(mman, struct radeon_device, mman);
67 return rdev;
68}
69
70static int radeon_ttm_init_vram(struct radeon_device *rdev)
71{
72 return ttm_range_man_init(&rdev->mman.bdev, TTM_PL_VRAM,
73 false, rdev->mc.real_vram_size >> PAGE_SHIFT);
74}
75
76static int radeon_ttm_init_gtt(struct radeon_device *rdev)
77{
78 return ttm_range_man_init(&rdev->mman.bdev, TTM_PL_TT,
79 true, rdev->mc.gtt_size >> PAGE_SHIFT);
80}
81
82static void radeon_evict_flags(struct ttm_buffer_object *bo,
83 struct ttm_placement *placement)
84{
85 static const struct ttm_place placements = {
86 .fpfn = 0,
87 .lpfn = 0,
88 .mem_type = TTM_PL_SYSTEM,
89 .flags = 0
90 };
91
92 struct radeon_bo *rbo;
93
94 if (!radeon_ttm_bo_is_radeon_bo(bo)) {
95 placement->placement = &placements;
96 placement->num_placement = 1;
97 return;
98 }
99 rbo = container_of(bo, struct radeon_bo, tbo);
100 switch (bo->resource->mem_type) {
101 case TTM_PL_VRAM:
102 if (rbo->rdev->ring[radeon_copy_ring_index(rbo->rdev)].ready == false)
103 radeon_ttm_placement_from_domain(rbo, RADEON_GEM_DOMAIN_CPU);
104 else if (rbo->rdev->mc.visible_vram_size < rbo->rdev->mc.real_vram_size &&
105 bo->resource->start < (rbo->rdev->mc.visible_vram_size >> PAGE_SHIFT)) {
106 unsigned fpfn = rbo->rdev->mc.visible_vram_size >> PAGE_SHIFT;
107 int i;
108
109 /* Try evicting to the CPU inaccessible part of VRAM
110 * first, but only set GTT as busy placement, so this
111 * BO will be evicted to GTT rather than causing other
112 * BOs to be evicted from VRAM
113 */
114 radeon_ttm_placement_from_domain(rbo, RADEON_GEM_DOMAIN_VRAM |
115 RADEON_GEM_DOMAIN_GTT);
116 for (i = 0; i < rbo->placement.num_placement; i++) {
117 if (rbo->placements[i].mem_type == TTM_PL_VRAM) {
118 if (rbo->placements[i].fpfn < fpfn)
119 rbo->placements[i].fpfn = fpfn;
120 rbo->placements[0].flags |= TTM_PL_FLAG_DESIRED;
121 }
122 }
123 } else
124 radeon_ttm_placement_from_domain(rbo, RADEON_GEM_DOMAIN_GTT);
125 break;
126 case TTM_PL_TT:
127 default:
128 radeon_ttm_placement_from_domain(rbo, RADEON_GEM_DOMAIN_CPU);
129 }
130 *placement = rbo->placement;
131}
132
133static int radeon_move_blit(struct ttm_buffer_object *bo,
134 bool evict,
135 struct ttm_resource *new_mem,
136 struct ttm_resource *old_mem)
137{
138 struct radeon_device *rdev;
139 uint64_t old_start, new_start;
140 struct radeon_fence *fence;
141 unsigned num_pages;
142 int r, ridx;
143
144 rdev = radeon_get_rdev(bo->bdev);
145 ridx = radeon_copy_ring_index(rdev);
146 old_start = (u64)old_mem->start << PAGE_SHIFT;
147 new_start = (u64)new_mem->start << PAGE_SHIFT;
148
149 switch (old_mem->mem_type) {
150 case TTM_PL_VRAM:
151 old_start += rdev->mc.vram_start;
152 break;
153 case TTM_PL_TT:
154 old_start += rdev->mc.gtt_start;
155 break;
156 default:
157 DRM_ERROR("Unknown placement %d\n", old_mem->mem_type);
158 return -EINVAL;
159 }
160 switch (new_mem->mem_type) {
161 case TTM_PL_VRAM:
162 new_start += rdev->mc.vram_start;
163 break;
164 case TTM_PL_TT:
165 new_start += rdev->mc.gtt_start;
166 break;
167 default:
168 DRM_ERROR("Unknown placement %d\n", old_mem->mem_type);
169 return -EINVAL;
170 }
171 if (!rdev->ring[ridx].ready) {
172 DRM_ERROR("Trying to move memory with ring turned off.\n");
173 return -EINVAL;
174 }
175
176 BUILD_BUG_ON((PAGE_SIZE % RADEON_GPU_PAGE_SIZE) != 0);
177
178 num_pages = PFN_UP(new_mem->size) * (PAGE_SIZE / RADEON_GPU_PAGE_SIZE);
179 fence = radeon_copy(rdev, old_start, new_start, num_pages, bo->base.resv);
180 if (IS_ERR(fence))
181 return PTR_ERR(fence);
182
183 r = ttm_bo_move_accel_cleanup(bo, &fence->base, evict, false, new_mem);
184 radeon_fence_unref(&fence);
185 return r;
186}
187
188static int radeon_bo_move(struct ttm_buffer_object *bo, bool evict,
189 struct ttm_operation_ctx *ctx,
190 struct ttm_resource *new_mem,
191 struct ttm_place *hop)
192{
193 struct ttm_resource *old_mem = bo->resource;
194 struct radeon_device *rdev;
195 int r;
196
197 if (new_mem->mem_type == TTM_PL_TT) {
198 r = radeon_ttm_tt_bind(bo->bdev, bo->ttm, new_mem);
199 if (r)
200 return r;
201 }
202
203 r = ttm_bo_wait_ctx(bo, ctx);
204 if (r)
205 return r;
206
207 rdev = radeon_get_rdev(bo->bdev);
208 if (!old_mem || (old_mem->mem_type == TTM_PL_SYSTEM &&
209 bo->ttm == NULL)) {
210 ttm_bo_move_null(bo, new_mem);
211 goto out;
212 }
213 if (old_mem->mem_type == TTM_PL_SYSTEM &&
214 new_mem->mem_type == TTM_PL_TT) {
215 ttm_bo_move_null(bo, new_mem);
216 goto out;
217 }
218
219 if (old_mem->mem_type == TTM_PL_TT &&
220 new_mem->mem_type == TTM_PL_SYSTEM) {
221 radeon_ttm_tt_unbind(bo->bdev, bo->ttm);
222 ttm_bo_move_null(bo, new_mem);
223 goto out;
224 }
225 if (rdev->ring[radeon_copy_ring_index(rdev)].ready &&
226 rdev->asic->copy.copy != NULL) {
227 if ((old_mem->mem_type == TTM_PL_SYSTEM &&
228 new_mem->mem_type == TTM_PL_VRAM) ||
229 (old_mem->mem_type == TTM_PL_VRAM &&
230 new_mem->mem_type == TTM_PL_SYSTEM)) {
231 hop->fpfn = 0;
232 hop->lpfn = 0;
233 hop->mem_type = TTM_PL_TT;
234 hop->flags = 0;
235 return -EMULTIHOP;
236 }
237
238 r = radeon_move_blit(bo, evict, new_mem, old_mem);
239 } else {
240 r = -ENODEV;
241 }
242
243 if (r) {
244 r = ttm_bo_move_memcpy(bo, ctx, new_mem);
245 if (r)
246 return r;
247 }
248
249out:
250 /* update statistics */
251 atomic64_add(bo->base.size, &rdev->num_bytes_moved);
252 radeon_bo_move_notify(bo);
253 return 0;
254}
255
256static int radeon_ttm_io_mem_reserve(struct ttm_device *bdev, struct ttm_resource *mem)
257{
258 struct radeon_device *rdev = radeon_get_rdev(bdev);
259 size_t bus_size = (size_t)mem->size;
260
261 switch (mem->mem_type) {
262 case TTM_PL_SYSTEM:
263 /* system memory */
264 return 0;
265 case TTM_PL_TT:
266#if IS_ENABLED(CONFIG_AGP)
267 if (rdev->flags & RADEON_IS_AGP) {
268 /* RADEON_IS_AGP is set only if AGP is active */
269 mem->bus.offset = (mem->start << PAGE_SHIFT) +
270 rdev->mc.agp_base;
271 mem->bus.is_iomem = !rdev->agp->cant_use_aperture;
272 mem->bus.caching = ttm_write_combined;
273 }
274#endif
275 break;
276 case TTM_PL_VRAM:
277 mem->bus.offset = mem->start << PAGE_SHIFT;
278 /* check if it's visible */
279 if ((mem->bus.offset + bus_size) > rdev->mc.visible_vram_size)
280 return -EINVAL;
281 mem->bus.offset += rdev->mc.aper_base;
282 mem->bus.is_iomem = true;
283 mem->bus.caching = ttm_write_combined;
284#ifdef __alpha__
285 /*
286 * Alpha: use bus.addr to hold the ioremap() return,
287 * so we can modify bus.base below.
288 */
289 mem->bus.addr = ioremap_wc(mem->bus.offset, bus_size);
290 if (!mem->bus.addr)
291 return -ENOMEM;
292
293 /*
294 * Alpha: Use just the bus offset plus
295 * the hose/domain memory base for bus.base.
296 * It then can be used to build PTEs for VRAM
297 * access, as done in ttm_bo_vm_fault().
298 */
299 mem->bus.offset = (mem->bus.offset & 0x0ffffffffUL) +
300 rdev->hose->dense_mem_base;
301#endif
302 break;
303 default:
304 return -EINVAL;
305 }
306 return 0;
307}
308
309/*
310 * TTM backend functions.
311 */
312struct radeon_ttm_tt {
313 struct ttm_tt ttm;
314 u64 offset;
315
316 uint64_t userptr;
317 struct mm_struct *usermm;
318 uint32_t userflags;
319 bool bound;
320};
321
322/* prepare the sg table with the user pages */
323static int radeon_ttm_tt_pin_userptr(struct ttm_device *bdev, struct ttm_tt *ttm)
324{
325 struct radeon_device *rdev = radeon_get_rdev(bdev);
326 struct radeon_ttm_tt *gtt = (void *)ttm;
327 unsigned pinned = 0;
328 int r;
329
330 int write = !(gtt->userflags & RADEON_GEM_USERPTR_READONLY);
331 enum dma_data_direction direction = write ?
332 DMA_BIDIRECTIONAL : DMA_TO_DEVICE;
333
334 if (current->mm != gtt->usermm)
335 return -EPERM;
336
337 if (gtt->userflags & RADEON_GEM_USERPTR_ANONONLY) {
338 /* check that we only pin down anonymous memory
339 to prevent problems with writeback */
340 unsigned long end = gtt->userptr + (u64)ttm->num_pages * PAGE_SIZE;
341 struct vm_area_struct *vma;
342 vma = find_vma(gtt->usermm, gtt->userptr);
343 if (!vma || vma->vm_file || vma->vm_end < end)
344 return -EPERM;
345 }
346
347 do {
348 unsigned num_pages = ttm->num_pages - pinned;
349 uint64_t userptr = gtt->userptr + pinned * PAGE_SIZE;
350 struct page **pages = ttm->pages + pinned;
351
352 r = get_user_pages(userptr, num_pages, write ? FOLL_WRITE : 0,
353 pages);
354 if (r < 0)
355 goto release_pages;
356
357 pinned += r;
358
359 } while (pinned < ttm->num_pages);
360
361 r = sg_alloc_table_from_pages(ttm->sg, ttm->pages, ttm->num_pages, 0,
362 (u64)ttm->num_pages << PAGE_SHIFT,
363 GFP_KERNEL);
364 if (r)
365 goto release_sg;
366
367 r = dma_map_sgtable(rdev->dev, ttm->sg, direction, 0);
368 if (r)
369 goto release_sg;
370
371 drm_prime_sg_to_dma_addr_array(ttm->sg, gtt->ttm.dma_address,
372 ttm->num_pages);
373
374 return 0;
375
376release_sg:
377 kfree(ttm->sg);
378
379release_pages:
380 release_pages(ttm->pages, pinned);
381 return r;
382}
383
384static void radeon_ttm_tt_unpin_userptr(struct ttm_device *bdev, struct ttm_tt *ttm)
385{
386 struct radeon_device *rdev = radeon_get_rdev(bdev);
387 struct radeon_ttm_tt *gtt = (void *)ttm;
388 struct sg_page_iter sg_iter;
389
390 int write = !(gtt->userflags & RADEON_GEM_USERPTR_READONLY);
391 enum dma_data_direction direction = write ?
392 DMA_BIDIRECTIONAL : DMA_TO_DEVICE;
393
394 /* double check that we don't free the table twice */
395 if (!ttm->sg || !ttm->sg->sgl)
396 return;
397
398 /* free the sg table and pages again */
399 dma_unmap_sgtable(rdev->dev, ttm->sg, direction, 0);
400
401 for_each_sgtable_page(ttm->sg, &sg_iter, 0) {
402 struct page *page = sg_page_iter_page(&sg_iter);
403 if (!(gtt->userflags & RADEON_GEM_USERPTR_READONLY))
404 set_page_dirty(page);
405
406 mark_page_accessed(page);
407 put_page(page);
408 }
409
410 sg_free_table(ttm->sg);
411}
412
413static bool radeon_ttm_backend_is_bound(struct ttm_tt *ttm)
414{
415 struct radeon_ttm_tt *gtt = (void*)ttm;
416
417 return (gtt->bound);
418}
419
420static int radeon_ttm_backend_bind(struct ttm_device *bdev,
421 struct ttm_tt *ttm,
422 struct ttm_resource *bo_mem)
423{
424 struct radeon_ttm_tt *gtt = (void*)ttm;
425 struct radeon_device *rdev = radeon_get_rdev(bdev);
426 uint32_t flags = RADEON_GART_PAGE_VALID | RADEON_GART_PAGE_READ |
427 RADEON_GART_PAGE_WRITE;
428 int r;
429
430 if (gtt->bound)
431 return 0;
432
433 if (gtt->userptr) {
434 radeon_ttm_tt_pin_userptr(bdev, ttm);
435 flags &= ~RADEON_GART_PAGE_WRITE;
436 }
437
438 gtt->offset = (unsigned long)(bo_mem->start << PAGE_SHIFT);
439 if (!ttm->num_pages) {
440 WARN(1, "nothing to bind %u pages for mreg %p back %p!\n",
441 ttm->num_pages, bo_mem, ttm);
442 }
443 if (ttm->caching == ttm_cached)
444 flags |= RADEON_GART_PAGE_SNOOP;
445 r = radeon_gart_bind(rdev, gtt->offset, ttm->num_pages,
446 ttm->pages, gtt->ttm.dma_address, flags);
447 if (r) {
448 DRM_ERROR("failed to bind %u pages at 0x%08X\n",
449 ttm->num_pages, (unsigned)gtt->offset);
450 return r;
451 }
452 gtt->bound = true;
453 return 0;
454}
455
456static void radeon_ttm_backend_unbind(struct ttm_device *bdev, struct ttm_tt *ttm)
457{
458 struct radeon_ttm_tt *gtt = (void *)ttm;
459 struct radeon_device *rdev = radeon_get_rdev(bdev);
460
461 if (gtt->userptr)
462 radeon_ttm_tt_unpin_userptr(bdev, ttm);
463
464 if (!gtt->bound)
465 return;
466
467 radeon_gart_unbind(rdev, gtt->offset, ttm->num_pages);
468
469 gtt->bound = false;
470}
471
472static void radeon_ttm_backend_destroy(struct ttm_device *bdev, struct ttm_tt *ttm)
473{
474 struct radeon_ttm_tt *gtt = (void *)ttm;
475
476 ttm_tt_fini(>t->ttm);
477 kfree(gtt);
478}
479
480static struct ttm_tt *radeon_ttm_tt_create(struct ttm_buffer_object *bo,
481 uint32_t page_flags)
482{
483 struct radeon_ttm_tt *gtt;
484 enum ttm_caching caching;
485 struct radeon_bo *rbo;
486#if IS_ENABLED(CONFIG_AGP)
487 struct radeon_device *rdev = radeon_get_rdev(bo->bdev);
488
489 if (rdev->flags & RADEON_IS_AGP) {
490 return ttm_agp_tt_create(bo, rdev->agp->bridge, page_flags);
491 }
492#endif
493 rbo = container_of(bo, struct radeon_bo, tbo);
494
495 gtt = kzalloc(sizeof(struct radeon_ttm_tt), GFP_KERNEL);
496 if (gtt == NULL) {
497 return NULL;
498 }
499
500 if (rbo->flags & RADEON_GEM_GTT_UC)
501 caching = ttm_uncached;
502 else if (rbo->flags & RADEON_GEM_GTT_WC)
503 caching = ttm_write_combined;
504 else
505 caching = ttm_cached;
506
507 if (ttm_sg_tt_init(>t->ttm, bo, page_flags, caching)) {
508 kfree(gtt);
509 return NULL;
510 }
511 return >t->ttm;
512}
513
514static struct radeon_ttm_tt *radeon_ttm_tt_to_gtt(struct radeon_device *rdev,
515 struct ttm_tt *ttm)
516{
517#if IS_ENABLED(CONFIG_AGP)
518 if (rdev->flags & RADEON_IS_AGP)
519 return NULL;
520#endif
521
522 if (!ttm)
523 return NULL;
524 return container_of(ttm, struct radeon_ttm_tt, ttm);
525}
526
527static int radeon_ttm_tt_populate(struct ttm_device *bdev,
528 struct ttm_tt *ttm,
529 struct ttm_operation_ctx *ctx)
530{
531 struct radeon_device *rdev = radeon_get_rdev(bdev);
532 struct radeon_ttm_tt *gtt = radeon_ttm_tt_to_gtt(rdev, ttm);
533 bool slave = !!(ttm->page_flags & TTM_TT_FLAG_EXTERNAL);
534
535 if (gtt && gtt->userptr) {
536 ttm->sg = kzalloc(sizeof(struct sg_table), GFP_KERNEL);
537 if (!ttm->sg)
538 return -ENOMEM;
539
540 ttm->page_flags |= TTM_TT_FLAG_EXTERNAL;
541 return 0;
542 }
543
544 if (slave && ttm->sg) {
545 drm_prime_sg_to_dma_addr_array(ttm->sg, gtt->ttm.dma_address,
546 ttm->num_pages);
547 return 0;
548 }
549
550 return ttm_pool_alloc(&rdev->mman.bdev.pool, ttm, ctx);
551}
552
553static void radeon_ttm_tt_unpopulate(struct ttm_device *bdev, struct ttm_tt *ttm)
554{
555 struct radeon_device *rdev = radeon_get_rdev(bdev);
556 struct radeon_ttm_tt *gtt = radeon_ttm_tt_to_gtt(rdev, ttm);
557 bool slave = !!(ttm->page_flags & TTM_TT_FLAG_EXTERNAL);
558
559 radeon_ttm_tt_unbind(bdev, ttm);
560
561 if (gtt && gtt->userptr) {
562 kfree(ttm->sg);
563 ttm->page_flags &= ~TTM_TT_FLAG_EXTERNAL;
564 return;
565 }
566
567 if (slave)
568 return;
569
570 return ttm_pool_free(&rdev->mman.bdev.pool, ttm);
571}
572
573int radeon_ttm_tt_set_userptr(struct radeon_device *rdev,
574 struct ttm_tt *ttm, uint64_t addr,
575 uint32_t flags)
576{
577 struct radeon_ttm_tt *gtt = radeon_ttm_tt_to_gtt(rdev, ttm);
578
579 if (gtt == NULL)
580 return -EINVAL;
581
582 gtt->userptr = addr;
583 gtt->usermm = current->mm;
584 gtt->userflags = flags;
585 return 0;
586}
587
588bool radeon_ttm_tt_is_bound(struct ttm_device *bdev,
589 struct ttm_tt *ttm)
590{
591#if IS_ENABLED(CONFIG_AGP)
592 struct radeon_device *rdev = radeon_get_rdev(bdev);
593 if (rdev->flags & RADEON_IS_AGP)
594 return ttm_agp_is_bound(ttm);
595#endif
596 return radeon_ttm_backend_is_bound(ttm);
597}
598
599static int radeon_ttm_tt_bind(struct ttm_device *bdev,
600 struct ttm_tt *ttm,
601 struct ttm_resource *bo_mem)
602{
603#if IS_ENABLED(CONFIG_AGP)
604 struct radeon_device *rdev = radeon_get_rdev(bdev);
605#endif
606
607 if (!bo_mem)
608 return -EINVAL;
609#if IS_ENABLED(CONFIG_AGP)
610 if (rdev->flags & RADEON_IS_AGP)
611 return ttm_agp_bind(ttm, bo_mem);
612#endif
613
614 return radeon_ttm_backend_bind(bdev, ttm, bo_mem);
615}
616
617static void radeon_ttm_tt_unbind(struct ttm_device *bdev,
618 struct ttm_tt *ttm)
619{
620#if IS_ENABLED(CONFIG_AGP)
621 struct radeon_device *rdev = radeon_get_rdev(bdev);
622
623 if (rdev->flags & RADEON_IS_AGP) {
624 ttm_agp_unbind(ttm);
625 return;
626 }
627#endif
628 radeon_ttm_backend_unbind(bdev, ttm);
629}
630
631static void radeon_ttm_tt_destroy(struct ttm_device *bdev,
632 struct ttm_tt *ttm)
633{
634#if IS_ENABLED(CONFIG_AGP)
635 struct radeon_device *rdev = radeon_get_rdev(bdev);
636
637 if (rdev->flags & RADEON_IS_AGP) {
638 ttm_agp_destroy(ttm);
639 return;
640 }
641#endif
642 radeon_ttm_backend_destroy(bdev, ttm);
643}
644
645bool radeon_ttm_tt_has_userptr(struct radeon_device *rdev,
646 struct ttm_tt *ttm)
647{
648 struct radeon_ttm_tt *gtt = radeon_ttm_tt_to_gtt(rdev, ttm);
649
650 if (gtt == NULL)
651 return false;
652
653 return !!gtt->userptr;
654}
655
656bool radeon_ttm_tt_is_readonly(struct radeon_device *rdev,
657 struct ttm_tt *ttm)
658{
659 struct radeon_ttm_tt *gtt = radeon_ttm_tt_to_gtt(rdev, ttm);
660
661 if (gtt == NULL)
662 return false;
663
664 return !!(gtt->userflags & RADEON_GEM_USERPTR_READONLY);
665}
666
667static struct ttm_device_funcs radeon_bo_driver = {
668 .ttm_tt_create = &radeon_ttm_tt_create,
669 .ttm_tt_populate = &radeon_ttm_tt_populate,
670 .ttm_tt_unpopulate = &radeon_ttm_tt_unpopulate,
671 .ttm_tt_destroy = &radeon_ttm_tt_destroy,
672 .eviction_valuable = ttm_bo_eviction_valuable,
673 .evict_flags = &radeon_evict_flags,
674 .move = &radeon_bo_move,
675 .io_mem_reserve = &radeon_ttm_io_mem_reserve,
676};
677
678int radeon_ttm_init(struct radeon_device *rdev)
679{
680 int r;
681
682 /* No others user of address space so set it to 0 */
683 r = ttm_device_init(&rdev->mman.bdev, &radeon_bo_driver, rdev->dev,
684 rdev_to_drm(rdev)->anon_inode->i_mapping,
685 rdev_to_drm(rdev)->vma_offset_manager,
686 rdev->need_swiotlb,
687 dma_addressing_limited(&rdev->pdev->dev));
688 if (r) {
689 DRM_ERROR("failed initializing buffer object driver(%d).\n", r);
690 return r;
691 }
692 rdev->mman.initialized = true;
693
694 r = radeon_ttm_init_vram(rdev);
695 if (r) {
696 DRM_ERROR("Failed initializing VRAM heap.\n");
697 return r;
698 }
699 /* Change the size here instead of the init above so only lpfn is affected */
700 radeon_ttm_set_active_vram_size(rdev, rdev->mc.visible_vram_size);
701
702 r = radeon_bo_create(rdev, 256 * 1024, PAGE_SIZE, true,
703 RADEON_GEM_DOMAIN_VRAM, 0, NULL,
704 NULL, &rdev->stolen_vga_memory);
705 if (r) {
706 return r;
707 }
708 r = radeon_bo_reserve(rdev->stolen_vga_memory, false);
709 if (r)
710 return r;
711 r = radeon_bo_pin(rdev->stolen_vga_memory, RADEON_GEM_DOMAIN_VRAM, NULL);
712 radeon_bo_unreserve(rdev->stolen_vga_memory);
713 if (r) {
714 radeon_bo_unref(&rdev->stolen_vga_memory);
715 return r;
716 }
717 DRM_INFO("radeon: %uM of VRAM memory ready\n",
718 (unsigned) (rdev->mc.real_vram_size / (1024 * 1024)));
719
720 r = radeon_ttm_init_gtt(rdev);
721 if (r) {
722 DRM_ERROR("Failed initializing GTT heap.\n");
723 return r;
724 }
725 DRM_INFO("radeon: %uM of GTT memory ready.\n",
726 (unsigned)(rdev->mc.gtt_size / (1024 * 1024)));
727
728 radeon_ttm_debugfs_init(rdev);
729
730 return 0;
731}
732
733void radeon_ttm_fini(struct radeon_device *rdev)
734{
735 int r;
736
737 if (!rdev->mman.initialized)
738 return;
739
740 if (rdev->stolen_vga_memory) {
741 r = radeon_bo_reserve(rdev->stolen_vga_memory, false);
742 if (r == 0) {
743 radeon_bo_unpin(rdev->stolen_vga_memory);
744 radeon_bo_unreserve(rdev->stolen_vga_memory);
745 }
746 radeon_bo_unref(&rdev->stolen_vga_memory);
747 }
748 ttm_range_man_fini(&rdev->mman.bdev, TTM_PL_VRAM);
749 ttm_range_man_fini(&rdev->mman.bdev, TTM_PL_TT);
750 ttm_device_fini(&rdev->mman.bdev);
751 radeon_gart_fini(rdev);
752 rdev->mman.initialized = false;
753 DRM_INFO("radeon: ttm finalized\n");
754}
755
756/* this should only be called at bootup or when userspace
757 * isn't running */
758void radeon_ttm_set_active_vram_size(struct radeon_device *rdev, u64 size)
759{
760 struct ttm_resource_manager *man;
761
762 if (!rdev->mman.initialized)
763 return;
764
765 man = ttm_manager_type(&rdev->mman.bdev, TTM_PL_VRAM);
766 /* this just adjusts TTM size idea, which sets lpfn to the correct value */
767 man->size = size >> PAGE_SHIFT;
768}
769
770#if defined(CONFIG_DEBUG_FS)
771
772static int radeon_ttm_page_pool_show(struct seq_file *m, void *data)
773{
774 struct radeon_device *rdev = m->private;
775
776 return ttm_pool_debugfs(&rdev->mman.bdev.pool, m);
777}
778
779DEFINE_SHOW_ATTRIBUTE(radeon_ttm_page_pool);
780
781static int radeon_ttm_vram_open(struct inode *inode, struct file *filep)
782{
783 struct radeon_device *rdev = inode->i_private;
784 i_size_write(inode, rdev->mc.mc_vram_size);
785 filep->private_data = inode->i_private;
786 return 0;
787}
788
789static ssize_t radeon_ttm_vram_read(struct file *f, char __user *buf,
790 size_t size, loff_t *pos)
791{
792 struct radeon_device *rdev = f->private_data;
793 ssize_t result = 0;
794 int r;
795
796 if (size & 0x3 || *pos & 0x3)
797 return -EINVAL;
798
799 while (size) {
800 unsigned long flags;
801 uint32_t value;
802
803 if (*pos >= rdev->mc.mc_vram_size)
804 return result;
805
806 spin_lock_irqsave(&rdev->mmio_idx_lock, flags);
807 WREG32(RADEON_MM_INDEX, ((uint32_t)*pos) | 0x80000000);
808 if (rdev->family >= CHIP_CEDAR)
809 WREG32(EVERGREEN_MM_INDEX_HI, *pos >> 31);
810 value = RREG32(RADEON_MM_DATA);
811 spin_unlock_irqrestore(&rdev->mmio_idx_lock, flags);
812
813 r = put_user(value, (uint32_t __user *)buf);
814 if (r)
815 return r;
816
817 result += 4;
818 buf += 4;
819 *pos += 4;
820 size -= 4;
821 }
822
823 return result;
824}
825
826static const struct file_operations radeon_ttm_vram_fops = {
827 .owner = THIS_MODULE,
828 .open = radeon_ttm_vram_open,
829 .read = radeon_ttm_vram_read,
830 .llseek = default_llseek
831};
832
833static int radeon_ttm_gtt_open(struct inode *inode, struct file *filep)
834{
835 struct radeon_device *rdev = inode->i_private;
836 i_size_write(inode, rdev->mc.gtt_size);
837 filep->private_data = inode->i_private;
838 return 0;
839}
840
841static ssize_t radeon_ttm_gtt_read(struct file *f, char __user *buf,
842 size_t size, loff_t *pos)
843{
844 struct radeon_device *rdev = f->private_data;
845 ssize_t result = 0;
846 int r;
847
848 while (size) {
849 loff_t p = *pos / PAGE_SIZE;
850 unsigned off = *pos & ~PAGE_MASK;
851 size_t cur_size = min_t(size_t, size, PAGE_SIZE - off);
852 struct page *page;
853 void *ptr;
854
855 if (p >= rdev->gart.num_cpu_pages)
856 return result;
857
858 page = rdev->gart.pages[p];
859 if (page) {
860 ptr = kmap_local_page(page);
861 ptr += off;
862
863 r = copy_to_user(buf, ptr, cur_size);
864 kunmap_local(ptr);
865 } else
866 r = clear_user(buf, cur_size);
867
868 if (r)
869 return -EFAULT;
870
871 result += cur_size;
872 buf += cur_size;
873 *pos += cur_size;
874 size -= cur_size;
875 }
876
877 return result;
878}
879
880static const struct file_operations radeon_ttm_gtt_fops = {
881 .owner = THIS_MODULE,
882 .open = radeon_ttm_gtt_open,
883 .read = radeon_ttm_gtt_read,
884 .llseek = default_llseek
885};
886
887#endif
888
889static void radeon_ttm_debugfs_init(struct radeon_device *rdev)
890{
891#if defined(CONFIG_DEBUG_FS)
892 struct drm_minor *minor = rdev_to_drm(rdev)->primary;
893 struct dentry *root = minor->debugfs_root;
894
895 debugfs_create_file("radeon_vram", 0444, root, rdev,
896 &radeon_ttm_vram_fops);
897 debugfs_create_file("radeon_gtt", 0444, root, rdev,
898 &radeon_ttm_gtt_fops);
899 debugfs_create_file("ttm_page_pool", 0444, root, rdev,
900 &radeon_ttm_page_pool_fops);
901 ttm_resource_manager_create_debugfs(ttm_manager_type(&rdev->mman.bdev,
902 TTM_PL_VRAM),
903 root, "radeon_vram_mm");
904 ttm_resource_manager_create_debugfs(ttm_manager_type(&rdev->mman.bdev,
905 TTM_PL_TT),
906 root, "radeon_gtt_mm");
907#endif
908}
1/*
2 * Copyright 2009 Jerome Glisse.
3 * All Rights Reserved.
4 *
5 * Permission is hereby granted, free of charge, to any person obtaining a
6 * copy of this software and associated documentation files (the
7 * "Software"), to deal in the Software without restriction, including
8 * without limitation the rights to use, copy, modify, merge, publish,
9 * distribute, sub license, and/or sell copies of the Software, and to
10 * permit persons to whom the Software is furnished to do so, subject to
11 * the following conditions:
12 *
13 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
14 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
15 * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL
16 * THE COPYRIGHT HOLDERS, AUTHORS AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM,
17 * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
18 * OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
19 * USE OR OTHER DEALINGS IN THE SOFTWARE.
20 *
21 * The above copyright notice and this permission notice (including the
22 * next paragraph) shall be included in all copies or substantial portions
23 * of the Software.
24 *
25 */
26/*
27 * Authors:
28 * Jerome Glisse <glisse@freedesktop.org>
29 * Thomas Hellstrom <thomas-at-tungstengraphics-dot-com>
30 * Dave Airlie
31 */
32
33#include <linux/dma-mapping.h>
34#include <linux/pagemap.h>
35#include <linux/seq_file.h>
36#include <linux/slab.h>
37#include <linux/swap.h>
38#include <linux/swiotlb.h>
39
40#include <drm/drm_agpsupport.h>
41#include <drm/drm_debugfs.h>
42#include <drm/drm_device.h>
43#include <drm/drm_file.h>
44#include <drm/drm_pci.h>
45#include <drm/drm_prime.h>
46#include <drm/radeon_drm.h>
47#include <drm/ttm/ttm_bo_api.h>
48#include <drm/ttm/ttm_bo_driver.h>
49#include <drm/ttm/ttm_module.h>
50#include <drm/ttm/ttm_page_alloc.h>
51#include <drm/ttm/ttm_placement.h>
52
53#include "radeon_reg.h"
54#include "radeon.h"
55
56static int radeon_ttm_debugfs_init(struct radeon_device *rdev);
57static void radeon_ttm_debugfs_fini(struct radeon_device *rdev);
58
59static struct radeon_device *radeon_get_rdev(struct ttm_bo_device *bdev)
60{
61 struct radeon_mman *mman;
62 struct radeon_device *rdev;
63
64 mman = container_of(bdev, struct radeon_mman, bdev);
65 rdev = container_of(mman, struct radeon_device, mman);
66 return rdev;
67}
68
69static int radeon_invalidate_caches(struct ttm_bo_device *bdev, uint32_t flags)
70{
71 return 0;
72}
73
74static int radeon_init_mem_type(struct ttm_bo_device *bdev, uint32_t type,
75 struct ttm_mem_type_manager *man)
76{
77 struct radeon_device *rdev;
78
79 rdev = radeon_get_rdev(bdev);
80
81 switch (type) {
82 case TTM_PL_SYSTEM:
83 /* System memory */
84 man->flags = TTM_MEMTYPE_FLAG_MAPPABLE;
85 man->available_caching = TTM_PL_MASK_CACHING;
86 man->default_caching = TTM_PL_FLAG_CACHED;
87 break;
88 case TTM_PL_TT:
89 man->func = &ttm_bo_manager_func;
90 man->gpu_offset = rdev->mc.gtt_start;
91 man->available_caching = TTM_PL_MASK_CACHING;
92 man->default_caching = TTM_PL_FLAG_CACHED;
93 man->flags = TTM_MEMTYPE_FLAG_MAPPABLE | TTM_MEMTYPE_FLAG_CMA;
94#if IS_ENABLED(CONFIG_AGP)
95 if (rdev->flags & RADEON_IS_AGP) {
96 if (!rdev->ddev->agp) {
97 DRM_ERROR("AGP is not enabled for memory type %u\n",
98 (unsigned)type);
99 return -EINVAL;
100 }
101 if (!rdev->ddev->agp->cant_use_aperture)
102 man->flags = TTM_MEMTYPE_FLAG_MAPPABLE;
103 man->available_caching = TTM_PL_FLAG_UNCACHED |
104 TTM_PL_FLAG_WC;
105 man->default_caching = TTM_PL_FLAG_WC;
106 }
107#endif
108 break;
109 case TTM_PL_VRAM:
110 /* "On-card" video ram */
111 man->func = &ttm_bo_manager_func;
112 man->gpu_offset = rdev->mc.vram_start;
113 man->flags = TTM_MEMTYPE_FLAG_FIXED |
114 TTM_MEMTYPE_FLAG_MAPPABLE;
115 man->available_caching = TTM_PL_FLAG_UNCACHED | TTM_PL_FLAG_WC;
116 man->default_caching = TTM_PL_FLAG_WC;
117 break;
118 default:
119 DRM_ERROR("Unsupported memory type %u\n", (unsigned)type);
120 return -EINVAL;
121 }
122 return 0;
123}
124
125static void radeon_evict_flags(struct ttm_buffer_object *bo,
126 struct ttm_placement *placement)
127{
128 static const struct ttm_place placements = {
129 .fpfn = 0,
130 .lpfn = 0,
131 .flags = TTM_PL_MASK_CACHING | TTM_PL_FLAG_SYSTEM
132 };
133
134 struct radeon_bo *rbo;
135
136 if (!radeon_ttm_bo_is_radeon_bo(bo)) {
137 placement->placement = &placements;
138 placement->busy_placement = &placements;
139 placement->num_placement = 1;
140 placement->num_busy_placement = 1;
141 return;
142 }
143 rbo = container_of(bo, struct radeon_bo, tbo);
144 switch (bo->mem.mem_type) {
145 case TTM_PL_VRAM:
146 if (rbo->rdev->ring[radeon_copy_ring_index(rbo->rdev)].ready == false)
147 radeon_ttm_placement_from_domain(rbo, RADEON_GEM_DOMAIN_CPU);
148 else if (rbo->rdev->mc.visible_vram_size < rbo->rdev->mc.real_vram_size &&
149 bo->mem.start < (rbo->rdev->mc.visible_vram_size >> PAGE_SHIFT)) {
150 unsigned fpfn = rbo->rdev->mc.visible_vram_size >> PAGE_SHIFT;
151 int i;
152
153 /* Try evicting to the CPU inaccessible part of VRAM
154 * first, but only set GTT as busy placement, so this
155 * BO will be evicted to GTT rather than causing other
156 * BOs to be evicted from VRAM
157 */
158 radeon_ttm_placement_from_domain(rbo, RADEON_GEM_DOMAIN_VRAM |
159 RADEON_GEM_DOMAIN_GTT);
160 rbo->placement.num_busy_placement = 0;
161 for (i = 0; i < rbo->placement.num_placement; i++) {
162 if (rbo->placements[i].flags & TTM_PL_FLAG_VRAM) {
163 if (rbo->placements[i].fpfn < fpfn)
164 rbo->placements[i].fpfn = fpfn;
165 } else {
166 rbo->placement.busy_placement =
167 &rbo->placements[i];
168 rbo->placement.num_busy_placement = 1;
169 }
170 }
171 } else
172 radeon_ttm_placement_from_domain(rbo, RADEON_GEM_DOMAIN_GTT);
173 break;
174 case TTM_PL_TT:
175 default:
176 radeon_ttm_placement_from_domain(rbo, RADEON_GEM_DOMAIN_CPU);
177 }
178 *placement = rbo->placement;
179}
180
181static int radeon_verify_access(struct ttm_buffer_object *bo, struct file *filp)
182{
183 struct radeon_bo *rbo = container_of(bo, struct radeon_bo, tbo);
184
185 if (radeon_ttm_tt_has_userptr(bo->ttm))
186 return -EPERM;
187 return drm_vma_node_verify_access(&rbo->tbo.base.vma_node,
188 filp->private_data);
189}
190
191static void radeon_move_null(struct ttm_buffer_object *bo,
192 struct ttm_mem_reg *new_mem)
193{
194 struct ttm_mem_reg *old_mem = &bo->mem;
195
196 BUG_ON(old_mem->mm_node != NULL);
197 *old_mem = *new_mem;
198 new_mem->mm_node = NULL;
199}
200
201static int radeon_move_blit(struct ttm_buffer_object *bo,
202 bool evict, bool no_wait_gpu,
203 struct ttm_mem_reg *new_mem,
204 struct ttm_mem_reg *old_mem)
205{
206 struct radeon_device *rdev;
207 uint64_t old_start, new_start;
208 struct radeon_fence *fence;
209 unsigned num_pages;
210 int r, ridx;
211
212 rdev = radeon_get_rdev(bo->bdev);
213 ridx = radeon_copy_ring_index(rdev);
214 old_start = (u64)old_mem->start << PAGE_SHIFT;
215 new_start = (u64)new_mem->start << PAGE_SHIFT;
216
217 switch (old_mem->mem_type) {
218 case TTM_PL_VRAM:
219 old_start += rdev->mc.vram_start;
220 break;
221 case TTM_PL_TT:
222 old_start += rdev->mc.gtt_start;
223 break;
224 default:
225 DRM_ERROR("Unknown placement %d\n", old_mem->mem_type);
226 return -EINVAL;
227 }
228 switch (new_mem->mem_type) {
229 case TTM_PL_VRAM:
230 new_start += rdev->mc.vram_start;
231 break;
232 case TTM_PL_TT:
233 new_start += rdev->mc.gtt_start;
234 break;
235 default:
236 DRM_ERROR("Unknown placement %d\n", old_mem->mem_type);
237 return -EINVAL;
238 }
239 if (!rdev->ring[ridx].ready) {
240 DRM_ERROR("Trying to move memory with ring turned off.\n");
241 return -EINVAL;
242 }
243
244 BUILD_BUG_ON((PAGE_SIZE % RADEON_GPU_PAGE_SIZE) != 0);
245
246 num_pages = new_mem->num_pages * (PAGE_SIZE / RADEON_GPU_PAGE_SIZE);
247 fence = radeon_copy(rdev, old_start, new_start, num_pages, bo->base.resv);
248 if (IS_ERR(fence))
249 return PTR_ERR(fence);
250
251 r = ttm_bo_move_accel_cleanup(bo, &fence->base, evict, new_mem);
252 radeon_fence_unref(&fence);
253 return r;
254}
255
256static int radeon_move_vram_ram(struct ttm_buffer_object *bo,
257 bool evict, bool interruptible,
258 bool no_wait_gpu,
259 struct ttm_mem_reg *new_mem)
260{
261 struct ttm_operation_ctx ctx = { interruptible, no_wait_gpu };
262 struct ttm_mem_reg *old_mem = &bo->mem;
263 struct ttm_mem_reg tmp_mem;
264 struct ttm_place placements;
265 struct ttm_placement placement;
266 int r;
267
268 tmp_mem = *new_mem;
269 tmp_mem.mm_node = NULL;
270 placement.num_placement = 1;
271 placement.placement = &placements;
272 placement.num_busy_placement = 1;
273 placement.busy_placement = &placements;
274 placements.fpfn = 0;
275 placements.lpfn = 0;
276 placements.flags = TTM_PL_MASK_CACHING | TTM_PL_FLAG_TT;
277 r = ttm_bo_mem_space(bo, &placement, &tmp_mem, &ctx);
278 if (unlikely(r)) {
279 return r;
280 }
281
282 r = ttm_tt_set_placement_caching(bo->ttm, tmp_mem.placement);
283 if (unlikely(r)) {
284 goto out_cleanup;
285 }
286
287 r = ttm_tt_bind(bo->ttm, &tmp_mem, &ctx);
288 if (unlikely(r)) {
289 goto out_cleanup;
290 }
291 r = radeon_move_blit(bo, true, no_wait_gpu, &tmp_mem, old_mem);
292 if (unlikely(r)) {
293 goto out_cleanup;
294 }
295 r = ttm_bo_move_ttm(bo, &ctx, new_mem);
296out_cleanup:
297 ttm_bo_mem_put(bo, &tmp_mem);
298 return r;
299}
300
301static int radeon_move_ram_vram(struct ttm_buffer_object *bo,
302 bool evict, bool interruptible,
303 bool no_wait_gpu,
304 struct ttm_mem_reg *new_mem)
305{
306 struct ttm_operation_ctx ctx = { interruptible, no_wait_gpu };
307 struct ttm_mem_reg *old_mem = &bo->mem;
308 struct ttm_mem_reg tmp_mem;
309 struct ttm_placement placement;
310 struct ttm_place placements;
311 int r;
312
313 tmp_mem = *new_mem;
314 tmp_mem.mm_node = NULL;
315 placement.num_placement = 1;
316 placement.placement = &placements;
317 placement.num_busy_placement = 1;
318 placement.busy_placement = &placements;
319 placements.fpfn = 0;
320 placements.lpfn = 0;
321 placements.flags = TTM_PL_MASK_CACHING | TTM_PL_FLAG_TT;
322 r = ttm_bo_mem_space(bo, &placement, &tmp_mem, &ctx);
323 if (unlikely(r)) {
324 return r;
325 }
326 r = ttm_bo_move_ttm(bo, &ctx, &tmp_mem);
327 if (unlikely(r)) {
328 goto out_cleanup;
329 }
330 r = radeon_move_blit(bo, true, no_wait_gpu, new_mem, old_mem);
331 if (unlikely(r)) {
332 goto out_cleanup;
333 }
334out_cleanup:
335 ttm_bo_mem_put(bo, &tmp_mem);
336 return r;
337}
338
339static int radeon_bo_move(struct ttm_buffer_object *bo, bool evict,
340 struct ttm_operation_ctx *ctx,
341 struct ttm_mem_reg *new_mem)
342{
343 struct radeon_device *rdev;
344 struct radeon_bo *rbo;
345 struct ttm_mem_reg *old_mem = &bo->mem;
346 int r;
347
348 r = ttm_bo_wait(bo, ctx->interruptible, ctx->no_wait_gpu);
349 if (r)
350 return r;
351
352 /* Can't move a pinned BO */
353 rbo = container_of(bo, struct radeon_bo, tbo);
354 if (WARN_ON_ONCE(rbo->pin_count > 0))
355 return -EINVAL;
356
357 rdev = radeon_get_rdev(bo->bdev);
358 if (old_mem->mem_type == TTM_PL_SYSTEM && bo->ttm == NULL) {
359 radeon_move_null(bo, new_mem);
360 return 0;
361 }
362 if ((old_mem->mem_type == TTM_PL_TT &&
363 new_mem->mem_type == TTM_PL_SYSTEM) ||
364 (old_mem->mem_type == TTM_PL_SYSTEM &&
365 new_mem->mem_type == TTM_PL_TT)) {
366 /* bind is enough */
367 radeon_move_null(bo, new_mem);
368 return 0;
369 }
370 if (!rdev->ring[radeon_copy_ring_index(rdev)].ready ||
371 rdev->asic->copy.copy == NULL) {
372 /* use memcpy */
373 goto memcpy;
374 }
375
376 if (old_mem->mem_type == TTM_PL_VRAM &&
377 new_mem->mem_type == TTM_PL_SYSTEM) {
378 r = radeon_move_vram_ram(bo, evict, ctx->interruptible,
379 ctx->no_wait_gpu, new_mem);
380 } else if (old_mem->mem_type == TTM_PL_SYSTEM &&
381 new_mem->mem_type == TTM_PL_VRAM) {
382 r = radeon_move_ram_vram(bo, evict, ctx->interruptible,
383 ctx->no_wait_gpu, new_mem);
384 } else {
385 r = radeon_move_blit(bo, evict, ctx->no_wait_gpu,
386 new_mem, old_mem);
387 }
388
389 if (r) {
390memcpy:
391 r = ttm_bo_move_memcpy(bo, ctx, new_mem);
392 if (r) {
393 return r;
394 }
395 }
396
397 /* update statistics */
398 atomic64_add((u64)bo->num_pages << PAGE_SHIFT, &rdev->num_bytes_moved);
399 return 0;
400}
401
402static int radeon_ttm_io_mem_reserve(struct ttm_bo_device *bdev, struct ttm_mem_reg *mem)
403{
404 struct ttm_mem_type_manager *man = &bdev->man[mem->mem_type];
405 struct radeon_device *rdev = radeon_get_rdev(bdev);
406
407 mem->bus.addr = NULL;
408 mem->bus.offset = 0;
409 mem->bus.size = mem->num_pages << PAGE_SHIFT;
410 mem->bus.base = 0;
411 mem->bus.is_iomem = false;
412 if (!(man->flags & TTM_MEMTYPE_FLAG_MAPPABLE))
413 return -EINVAL;
414 switch (mem->mem_type) {
415 case TTM_PL_SYSTEM:
416 /* system memory */
417 return 0;
418 case TTM_PL_TT:
419#if IS_ENABLED(CONFIG_AGP)
420 if (rdev->flags & RADEON_IS_AGP) {
421 /* RADEON_IS_AGP is set only if AGP is active */
422 mem->bus.offset = mem->start << PAGE_SHIFT;
423 mem->bus.base = rdev->mc.agp_base;
424 mem->bus.is_iomem = !rdev->ddev->agp->cant_use_aperture;
425 }
426#endif
427 break;
428 case TTM_PL_VRAM:
429 mem->bus.offset = mem->start << PAGE_SHIFT;
430 /* check if it's visible */
431 if ((mem->bus.offset + mem->bus.size) > rdev->mc.visible_vram_size)
432 return -EINVAL;
433 mem->bus.base = rdev->mc.aper_base;
434 mem->bus.is_iomem = true;
435#ifdef __alpha__
436 /*
437 * Alpha: use bus.addr to hold the ioremap() return,
438 * so we can modify bus.base below.
439 */
440 if (mem->placement & TTM_PL_FLAG_WC)
441 mem->bus.addr =
442 ioremap_wc(mem->bus.base + mem->bus.offset,
443 mem->bus.size);
444 else
445 mem->bus.addr =
446 ioremap_nocache(mem->bus.base + mem->bus.offset,
447 mem->bus.size);
448 if (!mem->bus.addr)
449 return -ENOMEM;
450
451 /*
452 * Alpha: Use just the bus offset plus
453 * the hose/domain memory base for bus.base.
454 * It then can be used to build PTEs for VRAM
455 * access, as done in ttm_bo_vm_fault().
456 */
457 mem->bus.base = (mem->bus.base & 0x0ffffffffUL) +
458 rdev->ddev->hose->dense_mem_base;
459#endif
460 break;
461 default:
462 return -EINVAL;
463 }
464 return 0;
465}
466
467static void radeon_ttm_io_mem_free(struct ttm_bo_device *bdev, struct ttm_mem_reg *mem)
468{
469}
470
471/*
472 * TTM backend functions.
473 */
474struct radeon_ttm_tt {
475 struct ttm_dma_tt ttm;
476 struct radeon_device *rdev;
477 u64 offset;
478
479 uint64_t userptr;
480 struct mm_struct *usermm;
481 uint32_t userflags;
482};
483
484/* prepare the sg table with the user pages */
485static int radeon_ttm_tt_pin_userptr(struct ttm_tt *ttm)
486{
487 struct radeon_device *rdev = radeon_get_rdev(ttm->bdev);
488 struct radeon_ttm_tt *gtt = (void *)ttm;
489 unsigned pinned = 0, nents;
490 int r;
491
492 int write = !(gtt->userflags & RADEON_GEM_USERPTR_READONLY);
493 enum dma_data_direction direction = write ?
494 DMA_BIDIRECTIONAL : DMA_TO_DEVICE;
495
496 if (current->mm != gtt->usermm)
497 return -EPERM;
498
499 if (gtt->userflags & RADEON_GEM_USERPTR_ANONONLY) {
500 /* check that we only pin down anonymous memory
501 to prevent problems with writeback */
502 unsigned long end = gtt->userptr + ttm->num_pages * PAGE_SIZE;
503 struct vm_area_struct *vma;
504 vma = find_vma(gtt->usermm, gtt->userptr);
505 if (!vma || vma->vm_file || vma->vm_end < end)
506 return -EPERM;
507 }
508
509 do {
510 unsigned num_pages = ttm->num_pages - pinned;
511 uint64_t userptr = gtt->userptr + pinned * PAGE_SIZE;
512 struct page **pages = ttm->pages + pinned;
513
514 r = get_user_pages(userptr, num_pages, write ? FOLL_WRITE : 0,
515 pages, NULL);
516 if (r < 0)
517 goto release_pages;
518
519 pinned += r;
520
521 } while (pinned < ttm->num_pages);
522
523 r = sg_alloc_table_from_pages(ttm->sg, ttm->pages, ttm->num_pages, 0,
524 ttm->num_pages << PAGE_SHIFT,
525 GFP_KERNEL);
526 if (r)
527 goto release_sg;
528
529 r = -ENOMEM;
530 nents = dma_map_sg(rdev->dev, ttm->sg->sgl, ttm->sg->nents, direction);
531 if (nents != ttm->sg->nents)
532 goto release_sg;
533
534 drm_prime_sg_to_page_addr_arrays(ttm->sg, ttm->pages,
535 gtt->ttm.dma_address, ttm->num_pages);
536
537 return 0;
538
539release_sg:
540 kfree(ttm->sg);
541
542release_pages:
543 release_pages(ttm->pages, pinned);
544 return r;
545}
546
547static void radeon_ttm_tt_unpin_userptr(struct ttm_tt *ttm)
548{
549 struct radeon_device *rdev = radeon_get_rdev(ttm->bdev);
550 struct radeon_ttm_tt *gtt = (void *)ttm;
551 struct sg_page_iter sg_iter;
552
553 int write = !(gtt->userflags & RADEON_GEM_USERPTR_READONLY);
554 enum dma_data_direction direction = write ?
555 DMA_BIDIRECTIONAL : DMA_TO_DEVICE;
556
557 /* double check that we don't free the table twice */
558 if (!ttm->sg->sgl)
559 return;
560
561 /* free the sg table and pages again */
562 dma_unmap_sg(rdev->dev, ttm->sg->sgl, ttm->sg->nents, direction);
563
564 for_each_sg_page(ttm->sg->sgl, &sg_iter, ttm->sg->nents, 0) {
565 struct page *page = sg_page_iter_page(&sg_iter);
566 if (!(gtt->userflags & RADEON_GEM_USERPTR_READONLY))
567 set_page_dirty(page);
568
569 mark_page_accessed(page);
570 put_page(page);
571 }
572
573 sg_free_table(ttm->sg);
574}
575
576static int radeon_ttm_backend_bind(struct ttm_tt *ttm,
577 struct ttm_mem_reg *bo_mem)
578{
579 struct radeon_ttm_tt *gtt = (void*)ttm;
580 uint32_t flags = RADEON_GART_PAGE_VALID | RADEON_GART_PAGE_READ |
581 RADEON_GART_PAGE_WRITE;
582 int r;
583
584 if (gtt->userptr) {
585 radeon_ttm_tt_pin_userptr(ttm);
586 flags &= ~RADEON_GART_PAGE_WRITE;
587 }
588
589 gtt->offset = (unsigned long)(bo_mem->start << PAGE_SHIFT);
590 if (!ttm->num_pages) {
591 WARN(1, "nothing to bind %lu pages for mreg %p back %p!\n",
592 ttm->num_pages, bo_mem, ttm);
593 }
594 if (ttm->caching_state == tt_cached)
595 flags |= RADEON_GART_PAGE_SNOOP;
596 r = radeon_gart_bind(gtt->rdev, gtt->offset, ttm->num_pages,
597 ttm->pages, gtt->ttm.dma_address, flags);
598 if (r) {
599 DRM_ERROR("failed to bind %lu pages at 0x%08X\n",
600 ttm->num_pages, (unsigned)gtt->offset);
601 return r;
602 }
603 return 0;
604}
605
606static int radeon_ttm_backend_unbind(struct ttm_tt *ttm)
607{
608 struct radeon_ttm_tt *gtt = (void *)ttm;
609
610 radeon_gart_unbind(gtt->rdev, gtt->offset, ttm->num_pages);
611
612 if (gtt->userptr)
613 radeon_ttm_tt_unpin_userptr(ttm);
614
615 return 0;
616}
617
618static void radeon_ttm_backend_destroy(struct ttm_tt *ttm)
619{
620 struct radeon_ttm_tt *gtt = (void *)ttm;
621
622 ttm_dma_tt_fini(>t->ttm);
623 kfree(gtt);
624}
625
626static struct ttm_backend_func radeon_backend_func = {
627 .bind = &radeon_ttm_backend_bind,
628 .unbind = &radeon_ttm_backend_unbind,
629 .destroy = &radeon_ttm_backend_destroy,
630};
631
632static struct ttm_tt *radeon_ttm_tt_create(struct ttm_buffer_object *bo,
633 uint32_t page_flags)
634{
635 struct radeon_device *rdev;
636 struct radeon_ttm_tt *gtt;
637
638 rdev = radeon_get_rdev(bo->bdev);
639#if IS_ENABLED(CONFIG_AGP)
640 if (rdev->flags & RADEON_IS_AGP) {
641 return ttm_agp_tt_create(bo, rdev->ddev->agp->bridge,
642 page_flags);
643 }
644#endif
645
646 gtt = kzalloc(sizeof(struct radeon_ttm_tt), GFP_KERNEL);
647 if (gtt == NULL) {
648 return NULL;
649 }
650 gtt->ttm.ttm.func = &radeon_backend_func;
651 gtt->rdev = rdev;
652 if (ttm_dma_tt_init(>t->ttm, bo, page_flags)) {
653 kfree(gtt);
654 return NULL;
655 }
656 return >t->ttm.ttm;
657}
658
659static struct radeon_ttm_tt *radeon_ttm_tt_to_gtt(struct ttm_tt *ttm)
660{
661 if (!ttm || ttm->func != &radeon_backend_func)
662 return NULL;
663 return (struct radeon_ttm_tt *)ttm;
664}
665
666static int radeon_ttm_tt_populate(struct ttm_tt *ttm,
667 struct ttm_operation_ctx *ctx)
668{
669 struct radeon_ttm_tt *gtt = radeon_ttm_tt_to_gtt(ttm);
670 struct radeon_device *rdev;
671 bool slave = !!(ttm->page_flags & TTM_PAGE_FLAG_SG);
672
673 if (gtt && gtt->userptr) {
674 ttm->sg = kzalloc(sizeof(struct sg_table), GFP_KERNEL);
675 if (!ttm->sg)
676 return -ENOMEM;
677
678 ttm->page_flags |= TTM_PAGE_FLAG_SG;
679 ttm->state = tt_unbound;
680 return 0;
681 }
682
683 if (slave && ttm->sg) {
684 drm_prime_sg_to_page_addr_arrays(ttm->sg, ttm->pages,
685 gtt->ttm.dma_address, ttm->num_pages);
686 ttm->state = tt_unbound;
687 return 0;
688 }
689
690 rdev = radeon_get_rdev(ttm->bdev);
691#if IS_ENABLED(CONFIG_AGP)
692 if (rdev->flags & RADEON_IS_AGP) {
693 return ttm_agp_tt_populate(ttm, ctx);
694 }
695#endif
696
697#ifdef CONFIG_SWIOTLB
698 if (rdev->need_swiotlb && swiotlb_nr_tbl()) {
699 return ttm_dma_populate(>t->ttm, rdev->dev, ctx);
700 }
701#endif
702
703 return ttm_populate_and_map_pages(rdev->dev, >t->ttm, ctx);
704}
705
706static void radeon_ttm_tt_unpopulate(struct ttm_tt *ttm)
707{
708 struct radeon_device *rdev;
709 struct radeon_ttm_tt *gtt = radeon_ttm_tt_to_gtt(ttm);
710 bool slave = !!(ttm->page_flags & TTM_PAGE_FLAG_SG);
711
712 if (gtt && gtt->userptr) {
713 kfree(ttm->sg);
714 ttm->page_flags &= ~TTM_PAGE_FLAG_SG;
715 return;
716 }
717
718 if (slave)
719 return;
720
721 rdev = radeon_get_rdev(ttm->bdev);
722#if IS_ENABLED(CONFIG_AGP)
723 if (rdev->flags & RADEON_IS_AGP) {
724 ttm_agp_tt_unpopulate(ttm);
725 return;
726 }
727#endif
728
729#ifdef CONFIG_SWIOTLB
730 if (rdev->need_swiotlb && swiotlb_nr_tbl()) {
731 ttm_dma_unpopulate(>t->ttm, rdev->dev);
732 return;
733 }
734#endif
735
736 ttm_unmap_and_unpopulate_pages(rdev->dev, >t->ttm);
737}
738
739int radeon_ttm_tt_set_userptr(struct ttm_tt *ttm, uint64_t addr,
740 uint32_t flags)
741{
742 struct radeon_ttm_tt *gtt = radeon_ttm_tt_to_gtt(ttm);
743
744 if (gtt == NULL)
745 return -EINVAL;
746
747 gtt->userptr = addr;
748 gtt->usermm = current->mm;
749 gtt->userflags = flags;
750 return 0;
751}
752
753bool radeon_ttm_tt_has_userptr(struct ttm_tt *ttm)
754{
755 struct radeon_ttm_tt *gtt = radeon_ttm_tt_to_gtt(ttm);
756
757 if (gtt == NULL)
758 return false;
759
760 return !!gtt->userptr;
761}
762
763bool radeon_ttm_tt_is_readonly(struct ttm_tt *ttm)
764{
765 struct radeon_ttm_tt *gtt = radeon_ttm_tt_to_gtt(ttm);
766
767 if (gtt == NULL)
768 return false;
769
770 return !!(gtt->userflags & RADEON_GEM_USERPTR_READONLY);
771}
772
773static struct ttm_bo_driver radeon_bo_driver = {
774 .ttm_tt_create = &radeon_ttm_tt_create,
775 .ttm_tt_populate = &radeon_ttm_tt_populate,
776 .ttm_tt_unpopulate = &radeon_ttm_tt_unpopulate,
777 .invalidate_caches = &radeon_invalidate_caches,
778 .init_mem_type = &radeon_init_mem_type,
779 .eviction_valuable = ttm_bo_eviction_valuable,
780 .evict_flags = &radeon_evict_flags,
781 .move = &radeon_bo_move,
782 .verify_access = &radeon_verify_access,
783 .move_notify = &radeon_bo_move_notify,
784 .fault_reserve_notify = &radeon_bo_fault_reserve_notify,
785 .io_mem_reserve = &radeon_ttm_io_mem_reserve,
786 .io_mem_free = &radeon_ttm_io_mem_free,
787};
788
789int radeon_ttm_init(struct radeon_device *rdev)
790{
791 int r;
792
793 /* No others user of address space so set it to 0 */
794 r = ttm_bo_device_init(&rdev->mman.bdev,
795 &radeon_bo_driver,
796 rdev->ddev->anon_inode->i_mapping,
797 dma_addressing_limited(&rdev->pdev->dev));
798 if (r) {
799 DRM_ERROR("failed initializing buffer object driver(%d).\n", r);
800 return r;
801 }
802 rdev->mman.initialized = true;
803 r = ttm_bo_init_mm(&rdev->mman.bdev, TTM_PL_VRAM,
804 rdev->mc.real_vram_size >> PAGE_SHIFT);
805 if (r) {
806 DRM_ERROR("Failed initializing VRAM heap.\n");
807 return r;
808 }
809 /* Change the size here instead of the init above so only lpfn is affected */
810 radeon_ttm_set_active_vram_size(rdev, rdev->mc.visible_vram_size);
811
812 r = radeon_bo_create(rdev, 256 * 1024, PAGE_SIZE, true,
813 RADEON_GEM_DOMAIN_VRAM, 0, NULL,
814 NULL, &rdev->stolen_vga_memory);
815 if (r) {
816 return r;
817 }
818 r = radeon_bo_reserve(rdev->stolen_vga_memory, false);
819 if (r)
820 return r;
821 r = radeon_bo_pin(rdev->stolen_vga_memory, RADEON_GEM_DOMAIN_VRAM, NULL);
822 radeon_bo_unreserve(rdev->stolen_vga_memory);
823 if (r) {
824 radeon_bo_unref(&rdev->stolen_vga_memory);
825 return r;
826 }
827 DRM_INFO("radeon: %uM of VRAM memory ready\n",
828 (unsigned) (rdev->mc.real_vram_size / (1024 * 1024)));
829 r = ttm_bo_init_mm(&rdev->mman.bdev, TTM_PL_TT,
830 rdev->mc.gtt_size >> PAGE_SHIFT);
831 if (r) {
832 DRM_ERROR("Failed initializing GTT heap.\n");
833 return r;
834 }
835 DRM_INFO("radeon: %uM of GTT memory ready.\n",
836 (unsigned)(rdev->mc.gtt_size / (1024 * 1024)));
837
838 r = radeon_ttm_debugfs_init(rdev);
839 if (r) {
840 DRM_ERROR("Failed to init debugfs\n");
841 return r;
842 }
843 return 0;
844}
845
846void radeon_ttm_fini(struct radeon_device *rdev)
847{
848 int r;
849
850 if (!rdev->mman.initialized)
851 return;
852 radeon_ttm_debugfs_fini(rdev);
853 if (rdev->stolen_vga_memory) {
854 r = radeon_bo_reserve(rdev->stolen_vga_memory, false);
855 if (r == 0) {
856 radeon_bo_unpin(rdev->stolen_vga_memory);
857 radeon_bo_unreserve(rdev->stolen_vga_memory);
858 }
859 radeon_bo_unref(&rdev->stolen_vga_memory);
860 }
861 ttm_bo_clean_mm(&rdev->mman.bdev, TTM_PL_VRAM);
862 ttm_bo_clean_mm(&rdev->mman.bdev, TTM_PL_TT);
863 ttm_bo_device_release(&rdev->mman.bdev);
864 radeon_gart_fini(rdev);
865 rdev->mman.initialized = false;
866 DRM_INFO("radeon: ttm finalized\n");
867}
868
869/* this should only be called at bootup or when userspace
870 * isn't running */
871void radeon_ttm_set_active_vram_size(struct radeon_device *rdev, u64 size)
872{
873 struct ttm_mem_type_manager *man;
874
875 if (!rdev->mman.initialized)
876 return;
877
878 man = &rdev->mman.bdev.man[TTM_PL_VRAM];
879 /* this just adjusts TTM size idea, which sets lpfn to the correct value */
880 man->size = size >> PAGE_SHIFT;
881}
882
883static struct vm_operations_struct radeon_ttm_vm_ops;
884static const struct vm_operations_struct *ttm_vm_ops = NULL;
885
886static vm_fault_t radeon_ttm_fault(struct vm_fault *vmf)
887{
888 struct ttm_buffer_object *bo;
889 struct radeon_device *rdev;
890 vm_fault_t ret;
891
892 bo = (struct ttm_buffer_object *)vmf->vma->vm_private_data;
893 if (bo == NULL) {
894 return VM_FAULT_NOPAGE;
895 }
896 rdev = radeon_get_rdev(bo->bdev);
897 down_read(&rdev->pm.mclk_lock);
898 ret = ttm_vm_ops->fault(vmf);
899 up_read(&rdev->pm.mclk_lock);
900 return ret;
901}
902
903int radeon_mmap(struct file *filp, struct vm_area_struct *vma)
904{
905 int r;
906 struct drm_file *file_priv = filp->private_data;
907 struct radeon_device *rdev = file_priv->minor->dev->dev_private;
908
909 if (rdev == NULL) {
910 return -EINVAL;
911 }
912 r = ttm_bo_mmap(filp, vma, &rdev->mman.bdev);
913 if (unlikely(r != 0)) {
914 return r;
915 }
916 if (unlikely(ttm_vm_ops == NULL)) {
917 ttm_vm_ops = vma->vm_ops;
918 radeon_ttm_vm_ops = *ttm_vm_ops;
919 radeon_ttm_vm_ops.fault = &radeon_ttm_fault;
920 }
921 vma->vm_ops = &radeon_ttm_vm_ops;
922 return 0;
923}
924
925#if defined(CONFIG_DEBUG_FS)
926
927static int radeon_mm_dump_table(struct seq_file *m, void *data)
928{
929 struct drm_info_node *node = (struct drm_info_node *)m->private;
930 unsigned ttm_pl = *(int*)node->info_ent->data;
931 struct drm_device *dev = node->minor->dev;
932 struct radeon_device *rdev = dev->dev_private;
933 struct ttm_mem_type_manager *man = &rdev->mman.bdev.man[ttm_pl];
934 struct drm_printer p = drm_seq_file_printer(m);
935
936 man->func->debug(man, &p);
937 return 0;
938}
939
940
941static int ttm_pl_vram = TTM_PL_VRAM;
942static int ttm_pl_tt = TTM_PL_TT;
943
944static struct drm_info_list radeon_ttm_debugfs_list[] = {
945 {"radeon_vram_mm", radeon_mm_dump_table, 0, &ttm_pl_vram},
946 {"radeon_gtt_mm", radeon_mm_dump_table, 0, &ttm_pl_tt},
947 {"ttm_page_pool", ttm_page_alloc_debugfs, 0, NULL},
948#ifdef CONFIG_SWIOTLB
949 {"ttm_dma_page_pool", ttm_dma_page_alloc_debugfs, 0, NULL}
950#endif
951};
952
953static int radeon_ttm_vram_open(struct inode *inode, struct file *filep)
954{
955 struct radeon_device *rdev = inode->i_private;
956 i_size_write(inode, rdev->mc.mc_vram_size);
957 filep->private_data = inode->i_private;
958 return 0;
959}
960
961static ssize_t radeon_ttm_vram_read(struct file *f, char __user *buf,
962 size_t size, loff_t *pos)
963{
964 struct radeon_device *rdev = f->private_data;
965 ssize_t result = 0;
966 int r;
967
968 if (size & 0x3 || *pos & 0x3)
969 return -EINVAL;
970
971 while (size) {
972 unsigned long flags;
973 uint32_t value;
974
975 if (*pos >= rdev->mc.mc_vram_size)
976 return result;
977
978 spin_lock_irqsave(&rdev->mmio_idx_lock, flags);
979 WREG32(RADEON_MM_INDEX, ((uint32_t)*pos) | 0x80000000);
980 if (rdev->family >= CHIP_CEDAR)
981 WREG32(EVERGREEN_MM_INDEX_HI, *pos >> 31);
982 value = RREG32(RADEON_MM_DATA);
983 spin_unlock_irqrestore(&rdev->mmio_idx_lock, flags);
984
985 r = put_user(value, (uint32_t *)buf);
986 if (r)
987 return r;
988
989 result += 4;
990 buf += 4;
991 *pos += 4;
992 size -= 4;
993 }
994
995 return result;
996}
997
998static const struct file_operations radeon_ttm_vram_fops = {
999 .owner = THIS_MODULE,
1000 .open = radeon_ttm_vram_open,
1001 .read = radeon_ttm_vram_read,
1002 .llseek = default_llseek
1003};
1004
1005static int radeon_ttm_gtt_open(struct inode *inode, struct file *filep)
1006{
1007 struct radeon_device *rdev = inode->i_private;
1008 i_size_write(inode, rdev->mc.gtt_size);
1009 filep->private_data = inode->i_private;
1010 return 0;
1011}
1012
1013static ssize_t radeon_ttm_gtt_read(struct file *f, char __user *buf,
1014 size_t size, loff_t *pos)
1015{
1016 struct radeon_device *rdev = f->private_data;
1017 ssize_t result = 0;
1018 int r;
1019
1020 while (size) {
1021 loff_t p = *pos / PAGE_SIZE;
1022 unsigned off = *pos & ~PAGE_MASK;
1023 size_t cur_size = min_t(size_t, size, PAGE_SIZE - off);
1024 struct page *page;
1025 void *ptr;
1026
1027 if (p >= rdev->gart.num_cpu_pages)
1028 return result;
1029
1030 page = rdev->gart.pages[p];
1031 if (page) {
1032 ptr = kmap(page);
1033 ptr += off;
1034
1035 r = copy_to_user(buf, ptr, cur_size);
1036 kunmap(rdev->gart.pages[p]);
1037 } else
1038 r = clear_user(buf, cur_size);
1039
1040 if (r)
1041 return -EFAULT;
1042
1043 result += cur_size;
1044 buf += cur_size;
1045 *pos += cur_size;
1046 size -= cur_size;
1047 }
1048
1049 return result;
1050}
1051
1052static const struct file_operations radeon_ttm_gtt_fops = {
1053 .owner = THIS_MODULE,
1054 .open = radeon_ttm_gtt_open,
1055 .read = radeon_ttm_gtt_read,
1056 .llseek = default_llseek
1057};
1058
1059#endif
1060
1061static int radeon_ttm_debugfs_init(struct radeon_device *rdev)
1062{
1063#if defined(CONFIG_DEBUG_FS)
1064 unsigned count;
1065
1066 struct drm_minor *minor = rdev->ddev->primary;
1067 struct dentry *root = minor->debugfs_root;
1068
1069 rdev->mman.vram = debugfs_create_file("radeon_vram", S_IFREG | S_IRUGO,
1070 root, rdev,
1071 &radeon_ttm_vram_fops);
1072
1073 rdev->mman.gtt = debugfs_create_file("radeon_gtt", S_IFREG | S_IRUGO,
1074 root, rdev, &radeon_ttm_gtt_fops);
1075
1076 count = ARRAY_SIZE(radeon_ttm_debugfs_list);
1077
1078#ifdef CONFIG_SWIOTLB
1079 if (!(rdev->need_swiotlb && swiotlb_nr_tbl()))
1080 --count;
1081#endif
1082
1083 return radeon_debugfs_add_files(rdev, radeon_ttm_debugfs_list, count);
1084#else
1085
1086 return 0;
1087#endif
1088}
1089
1090static void radeon_ttm_debugfs_fini(struct radeon_device *rdev)
1091{
1092#if defined(CONFIG_DEBUG_FS)
1093
1094 debugfs_remove(rdev->mman.vram);
1095 rdev->mman.vram = NULL;
1096
1097 debugfs_remove(rdev->mman.gtt);
1098 rdev->mman.gtt = NULL;
1099#endif
1100}