Loading...
1/*
2 * Copyright 2009 Jerome Glisse.
3 * All Rights Reserved.
4 *
5 * Permission is hereby granted, free of charge, to any person obtaining a
6 * copy of this software and associated documentation files (the
7 * "Software"), to deal in the Software without restriction, including
8 * without limitation the rights to use, copy, modify, merge, publish,
9 * distribute, sub license, and/or sell copies of the Software, and to
10 * permit persons to whom the Software is furnished to do so, subject to
11 * the following conditions:
12 *
13 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
14 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
15 * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL
16 * THE COPYRIGHT HOLDERS, AUTHORS AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM,
17 * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
18 * OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
19 * USE OR OTHER DEALINGS IN THE SOFTWARE.
20 *
21 * The above copyright notice and this permission notice (including the
22 * next paragraph) shall be included in all copies or substantial portions
23 * of the Software.
24 *
25 */
26/*
27 * Authors:
28 * Jerome Glisse <glisse@freedesktop.org>
29 * Thomas Hellstrom <thomas-at-tungstengraphics-dot-com>
30 * Dave Airlie
31 */
32#include <ttm/ttm_bo_api.h>
33#include <ttm/ttm_bo_driver.h>
34#include <ttm/ttm_placement.h>
35#include <ttm/ttm_module.h>
36#include <ttm/ttm_page_alloc.h>
37#include <drm/drmP.h>
38#include <drm/radeon_drm.h>
39#include <linux/seq_file.h>
40#include <linux/slab.h>
41#include <linux/swiotlb.h>
42#include <linux/swap.h>
43#include <linux/pagemap.h>
44#include <linux/debugfs.h>
45#include "radeon_reg.h"
46#include "radeon.h"
47
48#define DRM_FILE_PAGE_OFFSET (0x100000000ULL >> PAGE_SHIFT)
49
50static int radeon_ttm_debugfs_init(struct radeon_device *rdev);
51static void radeon_ttm_debugfs_fini(struct radeon_device *rdev);
52
53static struct radeon_device *radeon_get_rdev(struct ttm_bo_device *bdev)
54{
55 struct radeon_mman *mman;
56 struct radeon_device *rdev;
57
58 mman = container_of(bdev, struct radeon_mman, bdev);
59 rdev = container_of(mman, struct radeon_device, mman);
60 return rdev;
61}
62
63
64/*
65 * Global memory.
66 */
67static int radeon_ttm_mem_global_init(struct drm_global_reference *ref)
68{
69 return ttm_mem_global_init(ref->object);
70}
71
72static void radeon_ttm_mem_global_release(struct drm_global_reference *ref)
73{
74 ttm_mem_global_release(ref->object);
75}
76
77static int radeon_ttm_global_init(struct radeon_device *rdev)
78{
79 struct drm_global_reference *global_ref;
80 int r;
81
82 rdev->mman.mem_global_referenced = false;
83 global_ref = &rdev->mman.mem_global_ref;
84 global_ref->global_type = DRM_GLOBAL_TTM_MEM;
85 global_ref->size = sizeof(struct ttm_mem_global);
86 global_ref->init = &radeon_ttm_mem_global_init;
87 global_ref->release = &radeon_ttm_mem_global_release;
88 r = drm_global_item_ref(global_ref);
89 if (r != 0) {
90 DRM_ERROR("Failed setting up TTM memory accounting "
91 "subsystem.\n");
92 return r;
93 }
94
95 rdev->mman.bo_global_ref.mem_glob =
96 rdev->mman.mem_global_ref.object;
97 global_ref = &rdev->mman.bo_global_ref.ref;
98 global_ref->global_type = DRM_GLOBAL_TTM_BO;
99 global_ref->size = sizeof(struct ttm_bo_global);
100 global_ref->init = &ttm_bo_global_init;
101 global_ref->release = &ttm_bo_global_release;
102 r = drm_global_item_ref(global_ref);
103 if (r != 0) {
104 DRM_ERROR("Failed setting up TTM BO subsystem.\n");
105 drm_global_item_unref(&rdev->mman.mem_global_ref);
106 return r;
107 }
108
109 rdev->mman.mem_global_referenced = true;
110 return 0;
111}
112
113static void radeon_ttm_global_fini(struct radeon_device *rdev)
114{
115 if (rdev->mman.mem_global_referenced) {
116 drm_global_item_unref(&rdev->mman.bo_global_ref.ref);
117 drm_global_item_unref(&rdev->mman.mem_global_ref);
118 rdev->mman.mem_global_referenced = false;
119 }
120}
121
122static int radeon_invalidate_caches(struct ttm_bo_device *bdev, uint32_t flags)
123{
124 return 0;
125}
126
127static int radeon_init_mem_type(struct ttm_bo_device *bdev, uint32_t type,
128 struct ttm_mem_type_manager *man)
129{
130 struct radeon_device *rdev;
131
132 rdev = radeon_get_rdev(bdev);
133
134 switch (type) {
135 case TTM_PL_SYSTEM:
136 /* System memory */
137 man->flags = TTM_MEMTYPE_FLAG_MAPPABLE;
138 man->available_caching = TTM_PL_MASK_CACHING;
139 man->default_caching = TTM_PL_FLAG_CACHED;
140 break;
141 case TTM_PL_TT:
142 man->func = &ttm_bo_manager_func;
143 man->gpu_offset = rdev->mc.gtt_start;
144 man->available_caching = TTM_PL_MASK_CACHING;
145 man->default_caching = TTM_PL_FLAG_CACHED;
146 man->flags = TTM_MEMTYPE_FLAG_MAPPABLE | TTM_MEMTYPE_FLAG_CMA;
147#if IS_ENABLED(CONFIG_AGP)
148 if (rdev->flags & RADEON_IS_AGP) {
149 if (!rdev->ddev->agp) {
150 DRM_ERROR("AGP is not enabled for memory type %u\n",
151 (unsigned)type);
152 return -EINVAL;
153 }
154 if (!rdev->ddev->agp->cant_use_aperture)
155 man->flags = TTM_MEMTYPE_FLAG_MAPPABLE;
156 man->available_caching = TTM_PL_FLAG_UNCACHED |
157 TTM_PL_FLAG_WC;
158 man->default_caching = TTM_PL_FLAG_WC;
159 }
160#endif
161 break;
162 case TTM_PL_VRAM:
163 /* "On-card" video ram */
164 man->func = &ttm_bo_manager_func;
165 man->gpu_offset = rdev->mc.vram_start;
166 man->flags = TTM_MEMTYPE_FLAG_FIXED |
167 TTM_MEMTYPE_FLAG_MAPPABLE;
168 man->available_caching = TTM_PL_FLAG_UNCACHED | TTM_PL_FLAG_WC;
169 man->default_caching = TTM_PL_FLAG_WC;
170 break;
171 default:
172 DRM_ERROR("Unsupported memory type %u\n", (unsigned)type);
173 return -EINVAL;
174 }
175 return 0;
176}
177
178static void radeon_evict_flags(struct ttm_buffer_object *bo,
179 struct ttm_placement *placement)
180{
181 static struct ttm_place placements = {
182 .fpfn = 0,
183 .lpfn = 0,
184 .flags = TTM_PL_MASK_CACHING | TTM_PL_FLAG_SYSTEM
185 };
186
187 struct radeon_bo *rbo;
188
189 if (!radeon_ttm_bo_is_radeon_bo(bo)) {
190 placement->placement = &placements;
191 placement->busy_placement = &placements;
192 placement->num_placement = 1;
193 placement->num_busy_placement = 1;
194 return;
195 }
196 rbo = container_of(bo, struct radeon_bo, tbo);
197 switch (bo->mem.mem_type) {
198 case TTM_PL_VRAM:
199 if (rbo->rdev->ring[radeon_copy_ring_index(rbo->rdev)].ready == false)
200 radeon_ttm_placement_from_domain(rbo, RADEON_GEM_DOMAIN_CPU);
201 else if (rbo->rdev->mc.visible_vram_size < rbo->rdev->mc.real_vram_size &&
202 bo->mem.start < (rbo->rdev->mc.visible_vram_size >> PAGE_SHIFT)) {
203 unsigned fpfn = rbo->rdev->mc.visible_vram_size >> PAGE_SHIFT;
204 int i;
205
206 /* Try evicting to the CPU inaccessible part of VRAM
207 * first, but only set GTT as busy placement, so this
208 * BO will be evicted to GTT rather than causing other
209 * BOs to be evicted from VRAM
210 */
211 radeon_ttm_placement_from_domain(rbo, RADEON_GEM_DOMAIN_VRAM |
212 RADEON_GEM_DOMAIN_GTT);
213 rbo->placement.num_busy_placement = 0;
214 for (i = 0; i < rbo->placement.num_placement; i++) {
215 if (rbo->placements[i].flags & TTM_PL_FLAG_VRAM) {
216 if (rbo->placements[0].fpfn < fpfn)
217 rbo->placements[0].fpfn = fpfn;
218 } else {
219 rbo->placement.busy_placement =
220 &rbo->placements[i];
221 rbo->placement.num_busy_placement = 1;
222 }
223 }
224 } else
225 radeon_ttm_placement_from_domain(rbo, RADEON_GEM_DOMAIN_GTT);
226 break;
227 case TTM_PL_TT:
228 default:
229 radeon_ttm_placement_from_domain(rbo, RADEON_GEM_DOMAIN_CPU);
230 }
231 *placement = rbo->placement;
232}
233
234static int radeon_verify_access(struct ttm_buffer_object *bo, struct file *filp)
235{
236 struct radeon_bo *rbo = container_of(bo, struct radeon_bo, tbo);
237
238 if (radeon_ttm_tt_has_userptr(bo->ttm))
239 return -EPERM;
240 return drm_vma_node_verify_access(&rbo->gem_base.vma_node, filp);
241}
242
243static void radeon_move_null(struct ttm_buffer_object *bo,
244 struct ttm_mem_reg *new_mem)
245{
246 struct ttm_mem_reg *old_mem = &bo->mem;
247
248 BUG_ON(old_mem->mm_node != NULL);
249 *old_mem = *new_mem;
250 new_mem->mm_node = NULL;
251}
252
253static int radeon_move_blit(struct ttm_buffer_object *bo,
254 bool evict, bool no_wait_gpu,
255 struct ttm_mem_reg *new_mem,
256 struct ttm_mem_reg *old_mem)
257{
258 struct radeon_device *rdev;
259 uint64_t old_start, new_start;
260 struct radeon_fence *fence;
261 unsigned num_pages;
262 int r, ridx;
263
264 rdev = radeon_get_rdev(bo->bdev);
265 ridx = radeon_copy_ring_index(rdev);
266 old_start = old_mem->start << PAGE_SHIFT;
267 new_start = new_mem->start << PAGE_SHIFT;
268
269 switch (old_mem->mem_type) {
270 case TTM_PL_VRAM:
271 old_start += rdev->mc.vram_start;
272 break;
273 case TTM_PL_TT:
274 old_start += rdev->mc.gtt_start;
275 break;
276 default:
277 DRM_ERROR("Unknown placement %d\n", old_mem->mem_type);
278 return -EINVAL;
279 }
280 switch (new_mem->mem_type) {
281 case TTM_PL_VRAM:
282 new_start += rdev->mc.vram_start;
283 break;
284 case TTM_PL_TT:
285 new_start += rdev->mc.gtt_start;
286 break;
287 default:
288 DRM_ERROR("Unknown placement %d\n", old_mem->mem_type);
289 return -EINVAL;
290 }
291 if (!rdev->ring[ridx].ready) {
292 DRM_ERROR("Trying to move memory with ring turned off.\n");
293 return -EINVAL;
294 }
295
296 BUILD_BUG_ON((PAGE_SIZE % RADEON_GPU_PAGE_SIZE) != 0);
297
298 num_pages = new_mem->num_pages * (PAGE_SIZE / RADEON_GPU_PAGE_SIZE);
299 fence = radeon_copy(rdev, old_start, new_start, num_pages, bo->resv);
300 if (IS_ERR(fence))
301 return PTR_ERR(fence);
302
303 r = ttm_bo_move_accel_cleanup(bo, &fence->base,
304 evict, no_wait_gpu, new_mem);
305 radeon_fence_unref(&fence);
306 return r;
307}
308
309static int radeon_move_vram_ram(struct ttm_buffer_object *bo,
310 bool evict, bool interruptible,
311 bool no_wait_gpu,
312 struct ttm_mem_reg *new_mem)
313{
314 struct radeon_device *rdev;
315 struct ttm_mem_reg *old_mem = &bo->mem;
316 struct ttm_mem_reg tmp_mem;
317 struct ttm_place placements;
318 struct ttm_placement placement;
319 int r;
320
321 rdev = radeon_get_rdev(bo->bdev);
322 tmp_mem = *new_mem;
323 tmp_mem.mm_node = NULL;
324 placement.num_placement = 1;
325 placement.placement = &placements;
326 placement.num_busy_placement = 1;
327 placement.busy_placement = &placements;
328 placements.fpfn = 0;
329 placements.lpfn = 0;
330 placements.flags = TTM_PL_MASK_CACHING | TTM_PL_FLAG_TT;
331 r = ttm_bo_mem_space(bo, &placement, &tmp_mem,
332 interruptible, no_wait_gpu);
333 if (unlikely(r)) {
334 return r;
335 }
336
337 r = ttm_tt_set_placement_caching(bo->ttm, tmp_mem.placement);
338 if (unlikely(r)) {
339 goto out_cleanup;
340 }
341
342 r = ttm_tt_bind(bo->ttm, &tmp_mem);
343 if (unlikely(r)) {
344 goto out_cleanup;
345 }
346 r = radeon_move_blit(bo, true, no_wait_gpu, &tmp_mem, old_mem);
347 if (unlikely(r)) {
348 goto out_cleanup;
349 }
350 r = ttm_bo_move_ttm(bo, true, no_wait_gpu, new_mem);
351out_cleanup:
352 ttm_bo_mem_put(bo, &tmp_mem);
353 return r;
354}
355
356static int radeon_move_ram_vram(struct ttm_buffer_object *bo,
357 bool evict, bool interruptible,
358 bool no_wait_gpu,
359 struct ttm_mem_reg *new_mem)
360{
361 struct radeon_device *rdev;
362 struct ttm_mem_reg *old_mem = &bo->mem;
363 struct ttm_mem_reg tmp_mem;
364 struct ttm_placement placement;
365 struct ttm_place placements;
366 int r;
367
368 rdev = radeon_get_rdev(bo->bdev);
369 tmp_mem = *new_mem;
370 tmp_mem.mm_node = NULL;
371 placement.num_placement = 1;
372 placement.placement = &placements;
373 placement.num_busy_placement = 1;
374 placement.busy_placement = &placements;
375 placements.fpfn = 0;
376 placements.lpfn = 0;
377 placements.flags = TTM_PL_MASK_CACHING | TTM_PL_FLAG_TT;
378 r = ttm_bo_mem_space(bo, &placement, &tmp_mem,
379 interruptible, no_wait_gpu);
380 if (unlikely(r)) {
381 return r;
382 }
383 r = ttm_bo_move_ttm(bo, true, no_wait_gpu, &tmp_mem);
384 if (unlikely(r)) {
385 goto out_cleanup;
386 }
387 r = radeon_move_blit(bo, true, no_wait_gpu, new_mem, old_mem);
388 if (unlikely(r)) {
389 goto out_cleanup;
390 }
391out_cleanup:
392 ttm_bo_mem_put(bo, &tmp_mem);
393 return r;
394}
395
396static int radeon_bo_move(struct ttm_buffer_object *bo,
397 bool evict, bool interruptible,
398 bool no_wait_gpu,
399 struct ttm_mem_reg *new_mem)
400{
401 struct radeon_device *rdev;
402 struct radeon_bo *rbo;
403 struct ttm_mem_reg *old_mem = &bo->mem;
404 int r;
405
406 /* Can't move a pinned BO */
407 rbo = container_of(bo, struct radeon_bo, tbo);
408 if (WARN_ON_ONCE(rbo->pin_count > 0))
409 return -EINVAL;
410
411 rdev = radeon_get_rdev(bo->bdev);
412 if (old_mem->mem_type == TTM_PL_SYSTEM && bo->ttm == NULL) {
413 radeon_move_null(bo, new_mem);
414 return 0;
415 }
416 if ((old_mem->mem_type == TTM_PL_TT &&
417 new_mem->mem_type == TTM_PL_SYSTEM) ||
418 (old_mem->mem_type == TTM_PL_SYSTEM &&
419 new_mem->mem_type == TTM_PL_TT)) {
420 /* bind is enough */
421 radeon_move_null(bo, new_mem);
422 return 0;
423 }
424 if (!rdev->ring[radeon_copy_ring_index(rdev)].ready ||
425 rdev->asic->copy.copy == NULL) {
426 /* use memcpy */
427 goto memcpy;
428 }
429
430 if (old_mem->mem_type == TTM_PL_VRAM &&
431 new_mem->mem_type == TTM_PL_SYSTEM) {
432 r = radeon_move_vram_ram(bo, evict, interruptible,
433 no_wait_gpu, new_mem);
434 } else if (old_mem->mem_type == TTM_PL_SYSTEM &&
435 new_mem->mem_type == TTM_PL_VRAM) {
436 r = radeon_move_ram_vram(bo, evict, interruptible,
437 no_wait_gpu, new_mem);
438 } else {
439 r = radeon_move_blit(bo, evict, no_wait_gpu, new_mem, old_mem);
440 }
441
442 if (r) {
443memcpy:
444 r = ttm_bo_move_memcpy(bo, evict, no_wait_gpu, new_mem);
445 if (r) {
446 return r;
447 }
448 }
449
450 /* update statistics */
451 atomic64_add((u64)bo->num_pages << PAGE_SHIFT, &rdev->num_bytes_moved);
452 return 0;
453}
454
455static int radeon_ttm_io_mem_reserve(struct ttm_bo_device *bdev, struct ttm_mem_reg *mem)
456{
457 struct ttm_mem_type_manager *man = &bdev->man[mem->mem_type];
458 struct radeon_device *rdev = radeon_get_rdev(bdev);
459
460 mem->bus.addr = NULL;
461 mem->bus.offset = 0;
462 mem->bus.size = mem->num_pages << PAGE_SHIFT;
463 mem->bus.base = 0;
464 mem->bus.is_iomem = false;
465 if (!(man->flags & TTM_MEMTYPE_FLAG_MAPPABLE))
466 return -EINVAL;
467 switch (mem->mem_type) {
468 case TTM_PL_SYSTEM:
469 /* system memory */
470 return 0;
471 case TTM_PL_TT:
472#if IS_ENABLED(CONFIG_AGP)
473 if (rdev->flags & RADEON_IS_AGP) {
474 /* RADEON_IS_AGP is set only if AGP is active */
475 mem->bus.offset = mem->start << PAGE_SHIFT;
476 mem->bus.base = rdev->mc.agp_base;
477 mem->bus.is_iomem = !rdev->ddev->agp->cant_use_aperture;
478 }
479#endif
480 break;
481 case TTM_PL_VRAM:
482 mem->bus.offset = mem->start << PAGE_SHIFT;
483 /* check if it's visible */
484 if ((mem->bus.offset + mem->bus.size) > rdev->mc.visible_vram_size)
485 return -EINVAL;
486 mem->bus.base = rdev->mc.aper_base;
487 mem->bus.is_iomem = true;
488#ifdef __alpha__
489 /*
490 * Alpha: use bus.addr to hold the ioremap() return,
491 * so we can modify bus.base below.
492 */
493 if (mem->placement & TTM_PL_FLAG_WC)
494 mem->bus.addr =
495 ioremap_wc(mem->bus.base + mem->bus.offset,
496 mem->bus.size);
497 else
498 mem->bus.addr =
499 ioremap_nocache(mem->bus.base + mem->bus.offset,
500 mem->bus.size);
501
502 /*
503 * Alpha: Use just the bus offset plus
504 * the hose/domain memory base for bus.base.
505 * It then can be used to build PTEs for VRAM
506 * access, as done in ttm_bo_vm_fault().
507 */
508 mem->bus.base = (mem->bus.base & 0x0ffffffffUL) +
509 rdev->ddev->hose->dense_mem_base;
510#endif
511 break;
512 default:
513 return -EINVAL;
514 }
515 return 0;
516}
517
518static void radeon_ttm_io_mem_free(struct ttm_bo_device *bdev, struct ttm_mem_reg *mem)
519{
520}
521
522/*
523 * TTM backend functions.
524 */
525struct radeon_ttm_tt {
526 struct ttm_dma_tt ttm;
527 struct radeon_device *rdev;
528 u64 offset;
529
530 uint64_t userptr;
531 struct mm_struct *usermm;
532 uint32_t userflags;
533};
534
535/* prepare the sg table with the user pages */
536static int radeon_ttm_tt_pin_userptr(struct ttm_tt *ttm)
537{
538 struct radeon_device *rdev = radeon_get_rdev(ttm->bdev);
539 struct radeon_ttm_tt *gtt = (void *)ttm;
540 unsigned pinned = 0, nents;
541 int r;
542
543 int write = !(gtt->userflags & RADEON_GEM_USERPTR_READONLY);
544 enum dma_data_direction direction = write ?
545 DMA_BIDIRECTIONAL : DMA_TO_DEVICE;
546
547 if (current->mm != gtt->usermm)
548 return -EPERM;
549
550 if (gtt->userflags & RADEON_GEM_USERPTR_ANONONLY) {
551 /* check that we only pin down anonymous memory
552 to prevent problems with writeback */
553 unsigned long end = gtt->userptr + ttm->num_pages * PAGE_SIZE;
554 struct vm_area_struct *vma;
555 vma = find_vma(gtt->usermm, gtt->userptr);
556 if (!vma || vma->vm_file || vma->vm_end < end)
557 return -EPERM;
558 }
559
560 do {
561 unsigned num_pages = ttm->num_pages - pinned;
562 uint64_t userptr = gtt->userptr + pinned * PAGE_SIZE;
563 struct page **pages = ttm->pages + pinned;
564
565 r = get_user_pages(userptr, num_pages, write, 0, pages, NULL);
566 if (r < 0)
567 goto release_pages;
568
569 pinned += r;
570
571 } while (pinned < ttm->num_pages);
572
573 r = sg_alloc_table_from_pages(ttm->sg, ttm->pages, ttm->num_pages, 0,
574 ttm->num_pages << PAGE_SHIFT,
575 GFP_KERNEL);
576 if (r)
577 goto release_sg;
578
579 r = -ENOMEM;
580 nents = dma_map_sg(rdev->dev, ttm->sg->sgl, ttm->sg->nents, direction);
581 if (nents != ttm->sg->nents)
582 goto release_sg;
583
584 drm_prime_sg_to_page_addr_arrays(ttm->sg, ttm->pages,
585 gtt->ttm.dma_address, ttm->num_pages);
586
587 return 0;
588
589release_sg:
590 kfree(ttm->sg);
591
592release_pages:
593 release_pages(ttm->pages, pinned, 0);
594 return r;
595}
596
597static void radeon_ttm_tt_unpin_userptr(struct ttm_tt *ttm)
598{
599 struct radeon_device *rdev = radeon_get_rdev(ttm->bdev);
600 struct radeon_ttm_tt *gtt = (void *)ttm;
601 struct sg_page_iter sg_iter;
602
603 int write = !(gtt->userflags & RADEON_GEM_USERPTR_READONLY);
604 enum dma_data_direction direction = write ?
605 DMA_BIDIRECTIONAL : DMA_TO_DEVICE;
606
607 /* double check that we don't free the table twice */
608 if (!ttm->sg->sgl)
609 return;
610
611 /* free the sg table and pages again */
612 dma_unmap_sg(rdev->dev, ttm->sg->sgl, ttm->sg->nents, direction);
613
614 for_each_sg_page(ttm->sg->sgl, &sg_iter, ttm->sg->nents, 0) {
615 struct page *page = sg_page_iter_page(&sg_iter);
616 if (!(gtt->userflags & RADEON_GEM_USERPTR_READONLY))
617 set_page_dirty(page);
618
619 mark_page_accessed(page);
620 put_page(page);
621 }
622
623 sg_free_table(ttm->sg);
624}
625
626static int radeon_ttm_backend_bind(struct ttm_tt *ttm,
627 struct ttm_mem_reg *bo_mem)
628{
629 struct radeon_ttm_tt *gtt = (void*)ttm;
630 uint32_t flags = RADEON_GART_PAGE_VALID | RADEON_GART_PAGE_READ |
631 RADEON_GART_PAGE_WRITE;
632 int r;
633
634 if (gtt->userptr) {
635 radeon_ttm_tt_pin_userptr(ttm);
636 flags &= ~RADEON_GART_PAGE_WRITE;
637 }
638
639 gtt->offset = (unsigned long)(bo_mem->start << PAGE_SHIFT);
640 if (!ttm->num_pages) {
641 WARN(1, "nothing to bind %lu pages for mreg %p back %p!\n",
642 ttm->num_pages, bo_mem, ttm);
643 }
644 if (ttm->caching_state == tt_cached)
645 flags |= RADEON_GART_PAGE_SNOOP;
646 r = radeon_gart_bind(gtt->rdev, gtt->offset, ttm->num_pages,
647 ttm->pages, gtt->ttm.dma_address, flags);
648 if (r) {
649 DRM_ERROR("failed to bind %lu pages at 0x%08X\n",
650 ttm->num_pages, (unsigned)gtt->offset);
651 return r;
652 }
653 return 0;
654}
655
656static int radeon_ttm_backend_unbind(struct ttm_tt *ttm)
657{
658 struct radeon_ttm_tt *gtt = (void *)ttm;
659
660 radeon_gart_unbind(gtt->rdev, gtt->offset, ttm->num_pages);
661
662 if (gtt->userptr)
663 radeon_ttm_tt_unpin_userptr(ttm);
664
665 return 0;
666}
667
668static void radeon_ttm_backend_destroy(struct ttm_tt *ttm)
669{
670 struct radeon_ttm_tt *gtt = (void *)ttm;
671
672 ttm_dma_tt_fini(>t->ttm);
673 kfree(gtt);
674}
675
676static struct ttm_backend_func radeon_backend_func = {
677 .bind = &radeon_ttm_backend_bind,
678 .unbind = &radeon_ttm_backend_unbind,
679 .destroy = &radeon_ttm_backend_destroy,
680};
681
682static struct ttm_tt *radeon_ttm_tt_create(struct ttm_bo_device *bdev,
683 unsigned long size, uint32_t page_flags,
684 struct page *dummy_read_page)
685{
686 struct radeon_device *rdev;
687 struct radeon_ttm_tt *gtt;
688
689 rdev = radeon_get_rdev(bdev);
690#if IS_ENABLED(CONFIG_AGP)
691 if (rdev->flags & RADEON_IS_AGP) {
692 return ttm_agp_tt_create(bdev, rdev->ddev->agp->bridge,
693 size, page_flags, dummy_read_page);
694 }
695#endif
696
697 gtt = kzalloc(sizeof(struct radeon_ttm_tt), GFP_KERNEL);
698 if (gtt == NULL) {
699 return NULL;
700 }
701 gtt->ttm.ttm.func = &radeon_backend_func;
702 gtt->rdev = rdev;
703 if (ttm_dma_tt_init(>t->ttm, bdev, size, page_flags, dummy_read_page)) {
704 kfree(gtt);
705 return NULL;
706 }
707 return >t->ttm.ttm;
708}
709
710static struct radeon_ttm_tt *radeon_ttm_tt_to_gtt(struct ttm_tt *ttm)
711{
712 if (!ttm || ttm->func != &radeon_backend_func)
713 return NULL;
714 return (struct radeon_ttm_tt *)ttm;
715}
716
717static int radeon_ttm_tt_populate(struct ttm_tt *ttm)
718{
719 struct radeon_ttm_tt *gtt = radeon_ttm_tt_to_gtt(ttm);
720 struct radeon_device *rdev;
721 unsigned i;
722 int r;
723 bool slave = !!(ttm->page_flags & TTM_PAGE_FLAG_SG);
724
725 if (ttm->state != tt_unpopulated)
726 return 0;
727
728 if (gtt && gtt->userptr) {
729 ttm->sg = kzalloc(sizeof(struct sg_table), GFP_KERNEL);
730 if (!ttm->sg)
731 return -ENOMEM;
732
733 ttm->page_flags |= TTM_PAGE_FLAG_SG;
734 ttm->state = tt_unbound;
735 return 0;
736 }
737
738 if (slave && ttm->sg) {
739 drm_prime_sg_to_page_addr_arrays(ttm->sg, ttm->pages,
740 gtt->ttm.dma_address, ttm->num_pages);
741 ttm->state = tt_unbound;
742 return 0;
743 }
744
745 rdev = radeon_get_rdev(ttm->bdev);
746#if IS_ENABLED(CONFIG_AGP)
747 if (rdev->flags & RADEON_IS_AGP) {
748 return ttm_agp_tt_populate(ttm);
749 }
750#endif
751
752#ifdef CONFIG_SWIOTLB
753 if (swiotlb_nr_tbl()) {
754 return ttm_dma_populate(>t->ttm, rdev->dev);
755 }
756#endif
757
758 r = ttm_pool_populate(ttm);
759 if (r) {
760 return r;
761 }
762
763 for (i = 0; i < ttm->num_pages; i++) {
764 gtt->ttm.dma_address[i] = pci_map_page(rdev->pdev, ttm->pages[i],
765 0, PAGE_SIZE,
766 PCI_DMA_BIDIRECTIONAL);
767 if (pci_dma_mapping_error(rdev->pdev, gtt->ttm.dma_address[i])) {
768 while (i--) {
769 pci_unmap_page(rdev->pdev, gtt->ttm.dma_address[i],
770 PAGE_SIZE, PCI_DMA_BIDIRECTIONAL);
771 gtt->ttm.dma_address[i] = 0;
772 }
773 ttm_pool_unpopulate(ttm);
774 return -EFAULT;
775 }
776 }
777 return 0;
778}
779
780static void radeon_ttm_tt_unpopulate(struct ttm_tt *ttm)
781{
782 struct radeon_device *rdev;
783 struct radeon_ttm_tt *gtt = radeon_ttm_tt_to_gtt(ttm);
784 unsigned i;
785 bool slave = !!(ttm->page_flags & TTM_PAGE_FLAG_SG);
786
787 if (gtt && gtt->userptr) {
788 kfree(ttm->sg);
789 ttm->page_flags &= ~TTM_PAGE_FLAG_SG;
790 return;
791 }
792
793 if (slave)
794 return;
795
796 rdev = radeon_get_rdev(ttm->bdev);
797#if IS_ENABLED(CONFIG_AGP)
798 if (rdev->flags & RADEON_IS_AGP) {
799 ttm_agp_tt_unpopulate(ttm);
800 return;
801 }
802#endif
803
804#ifdef CONFIG_SWIOTLB
805 if (swiotlb_nr_tbl()) {
806 ttm_dma_unpopulate(>t->ttm, rdev->dev);
807 return;
808 }
809#endif
810
811 for (i = 0; i < ttm->num_pages; i++) {
812 if (gtt->ttm.dma_address[i]) {
813 pci_unmap_page(rdev->pdev, gtt->ttm.dma_address[i],
814 PAGE_SIZE, PCI_DMA_BIDIRECTIONAL);
815 }
816 }
817
818 ttm_pool_unpopulate(ttm);
819}
820
821int radeon_ttm_tt_set_userptr(struct ttm_tt *ttm, uint64_t addr,
822 uint32_t flags)
823{
824 struct radeon_ttm_tt *gtt = radeon_ttm_tt_to_gtt(ttm);
825
826 if (gtt == NULL)
827 return -EINVAL;
828
829 gtt->userptr = addr;
830 gtt->usermm = current->mm;
831 gtt->userflags = flags;
832 return 0;
833}
834
835bool radeon_ttm_tt_has_userptr(struct ttm_tt *ttm)
836{
837 struct radeon_ttm_tt *gtt = radeon_ttm_tt_to_gtt(ttm);
838
839 if (gtt == NULL)
840 return false;
841
842 return !!gtt->userptr;
843}
844
845bool radeon_ttm_tt_is_readonly(struct ttm_tt *ttm)
846{
847 struct radeon_ttm_tt *gtt = radeon_ttm_tt_to_gtt(ttm);
848
849 if (gtt == NULL)
850 return false;
851
852 return !!(gtt->userflags & RADEON_GEM_USERPTR_READONLY);
853}
854
855static struct ttm_bo_driver radeon_bo_driver = {
856 .ttm_tt_create = &radeon_ttm_tt_create,
857 .ttm_tt_populate = &radeon_ttm_tt_populate,
858 .ttm_tt_unpopulate = &radeon_ttm_tt_unpopulate,
859 .invalidate_caches = &radeon_invalidate_caches,
860 .init_mem_type = &radeon_init_mem_type,
861 .evict_flags = &radeon_evict_flags,
862 .move = &radeon_bo_move,
863 .verify_access = &radeon_verify_access,
864 .move_notify = &radeon_bo_move_notify,
865 .fault_reserve_notify = &radeon_bo_fault_reserve_notify,
866 .io_mem_reserve = &radeon_ttm_io_mem_reserve,
867 .io_mem_free = &radeon_ttm_io_mem_free,
868};
869
870int radeon_ttm_init(struct radeon_device *rdev)
871{
872 int r;
873
874 r = radeon_ttm_global_init(rdev);
875 if (r) {
876 return r;
877 }
878 /* No others user of address space so set it to 0 */
879 r = ttm_bo_device_init(&rdev->mman.bdev,
880 rdev->mman.bo_global_ref.ref.object,
881 &radeon_bo_driver,
882 rdev->ddev->anon_inode->i_mapping,
883 DRM_FILE_PAGE_OFFSET,
884 rdev->need_dma32);
885 if (r) {
886 DRM_ERROR("failed initializing buffer object driver(%d).\n", r);
887 return r;
888 }
889 rdev->mman.initialized = true;
890 r = ttm_bo_init_mm(&rdev->mman.bdev, TTM_PL_VRAM,
891 rdev->mc.real_vram_size >> PAGE_SHIFT);
892 if (r) {
893 DRM_ERROR("Failed initializing VRAM heap.\n");
894 return r;
895 }
896 /* Change the size here instead of the init above so only lpfn is affected */
897 radeon_ttm_set_active_vram_size(rdev, rdev->mc.visible_vram_size);
898
899 r = radeon_bo_create(rdev, 256 * 1024, PAGE_SIZE, true,
900 RADEON_GEM_DOMAIN_VRAM, 0, NULL,
901 NULL, &rdev->stollen_vga_memory);
902 if (r) {
903 return r;
904 }
905 r = radeon_bo_reserve(rdev->stollen_vga_memory, false);
906 if (r)
907 return r;
908 r = radeon_bo_pin(rdev->stollen_vga_memory, RADEON_GEM_DOMAIN_VRAM, NULL);
909 radeon_bo_unreserve(rdev->stollen_vga_memory);
910 if (r) {
911 radeon_bo_unref(&rdev->stollen_vga_memory);
912 return r;
913 }
914 DRM_INFO("radeon: %uM of VRAM memory ready\n",
915 (unsigned) (rdev->mc.real_vram_size / (1024 * 1024)));
916 r = ttm_bo_init_mm(&rdev->mman.bdev, TTM_PL_TT,
917 rdev->mc.gtt_size >> PAGE_SHIFT);
918 if (r) {
919 DRM_ERROR("Failed initializing GTT heap.\n");
920 return r;
921 }
922 DRM_INFO("radeon: %uM of GTT memory ready.\n",
923 (unsigned)(rdev->mc.gtt_size / (1024 * 1024)));
924
925 r = radeon_ttm_debugfs_init(rdev);
926 if (r) {
927 DRM_ERROR("Failed to init debugfs\n");
928 return r;
929 }
930 return 0;
931}
932
933void radeon_ttm_fini(struct radeon_device *rdev)
934{
935 int r;
936
937 if (!rdev->mman.initialized)
938 return;
939 radeon_ttm_debugfs_fini(rdev);
940 if (rdev->stollen_vga_memory) {
941 r = radeon_bo_reserve(rdev->stollen_vga_memory, false);
942 if (r == 0) {
943 radeon_bo_unpin(rdev->stollen_vga_memory);
944 radeon_bo_unreserve(rdev->stollen_vga_memory);
945 }
946 radeon_bo_unref(&rdev->stollen_vga_memory);
947 }
948 ttm_bo_clean_mm(&rdev->mman.bdev, TTM_PL_VRAM);
949 ttm_bo_clean_mm(&rdev->mman.bdev, TTM_PL_TT);
950 ttm_bo_device_release(&rdev->mman.bdev);
951 radeon_gart_fini(rdev);
952 radeon_ttm_global_fini(rdev);
953 rdev->mman.initialized = false;
954 DRM_INFO("radeon: ttm finalized\n");
955}
956
957/* this should only be called at bootup or when userspace
958 * isn't running */
959void radeon_ttm_set_active_vram_size(struct radeon_device *rdev, u64 size)
960{
961 struct ttm_mem_type_manager *man;
962
963 if (!rdev->mman.initialized)
964 return;
965
966 man = &rdev->mman.bdev.man[TTM_PL_VRAM];
967 /* this just adjusts TTM size idea, which sets lpfn to the correct value */
968 man->size = size >> PAGE_SHIFT;
969}
970
971static struct vm_operations_struct radeon_ttm_vm_ops;
972static const struct vm_operations_struct *ttm_vm_ops = NULL;
973
974static int radeon_ttm_fault(struct vm_area_struct *vma, struct vm_fault *vmf)
975{
976 struct ttm_buffer_object *bo;
977 struct radeon_device *rdev;
978 int r;
979
980 bo = (struct ttm_buffer_object *)vma->vm_private_data;
981 if (bo == NULL) {
982 return VM_FAULT_NOPAGE;
983 }
984 rdev = radeon_get_rdev(bo->bdev);
985 down_read(&rdev->pm.mclk_lock);
986 r = ttm_vm_ops->fault(vma, vmf);
987 up_read(&rdev->pm.mclk_lock);
988 return r;
989}
990
991int radeon_mmap(struct file *filp, struct vm_area_struct *vma)
992{
993 struct drm_file *file_priv;
994 struct radeon_device *rdev;
995 int r;
996
997 if (unlikely(vma->vm_pgoff < DRM_FILE_PAGE_OFFSET)) {
998 return -EINVAL;
999 }
1000
1001 file_priv = filp->private_data;
1002 rdev = file_priv->minor->dev->dev_private;
1003 if (rdev == NULL) {
1004 return -EINVAL;
1005 }
1006 r = ttm_bo_mmap(filp, vma, &rdev->mman.bdev);
1007 if (unlikely(r != 0)) {
1008 return r;
1009 }
1010 if (unlikely(ttm_vm_ops == NULL)) {
1011 ttm_vm_ops = vma->vm_ops;
1012 radeon_ttm_vm_ops = *ttm_vm_ops;
1013 radeon_ttm_vm_ops.fault = &radeon_ttm_fault;
1014 }
1015 vma->vm_ops = &radeon_ttm_vm_ops;
1016 return 0;
1017}
1018
1019#if defined(CONFIG_DEBUG_FS)
1020
1021static int radeon_mm_dump_table(struct seq_file *m, void *data)
1022{
1023 struct drm_info_node *node = (struct drm_info_node *)m->private;
1024 unsigned ttm_pl = *(int *)node->info_ent->data;
1025 struct drm_device *dev = node->minor->dev;
1026 struct radeon_device *rdev = dev->dev_private;
1027 struct drm_mm *mm = (struct drm_mm *)rdev->mman.bdev.man[ttm_pl].priv;
1028 int ret;
1029 struct ttm_bo_global *glob = rdev->mman.bdev.glob;
1030
1031 spin_lock(&glob->lru_lock);
1032 ret = drm_mm_dump_table(m, mm);
1033 spin_unlock(&glob->lru_lock);
1034 return ret;
1035}
1036
1037static int ttm_pl_vram = TTM_PL_VRAM;
1038static int ttm_pl_tt = TTM_PL_TT;
1039
1040static struct drm_info_list radeon_ttm_debugfs_list[] = {
1041 {"radeon_vram_mm", radeon_mm_dump_table, 0, &ttm_pl_vram},
1042 {"radeon_gtt_mm", radeon_mm_dump_table, 0, &ttm_pl_tt},
1043 {"ttm_page_pool", ttm_page_alloc_debugfs, 0, NULL},
1044#ifdef CONFIG_SWIOTLB
1045 {"ttm_dma_page_pool", ttm_dma_page_alloc_debugfs, 0, NULL}
1046#endif
1047};
1048
1049static int radeon_ttm_vram_open(struct inode *inode, struct file *filep)
1050{
1051 struct radeon_device *rdev = inode->i_private;
1052 i_size_write(inode, rdev->mc.mc_vram_size);
1053 filep->private_data = inode->i_private;
1054 return 0;
1055}
1056
1057static ssize_t radeon_ttm_vram_read(struct file *f, char __user *buf,
1058 size_t size, loff_t *pos)
1059{
1060 struct radeon_device *rdev = f->private_data;
1061 ssize_t result = 0;
1062 int r;
1063
1064 if (size & 0x3 || *pos & 0x3)
1065 return -EINVAL;
1066
1067 while (size) {
1068 unsigned long flags;
1069 uint32_t value;
1070
1071 if (*pos >= rdev->mc.mc_vram_size)
1072 return result;
1073
1074 spin_lock_irqsave(&rdev->mmio_idx_lock, flags);
1075 WREG32(RADEON_MM_INDEX, ((uint32_t)*pos) | 0x80000000);
1076 if (rdev->family >= CHIP_CEDAR)
1077 WREG32(EVERGREEN_MM_INDEX_HI, *pos >> 31);
1078 value = RREG32(RADEON_MM_DATA);
1079 spin_unlock_irqrestore(&rdev->mmio_idx_lock, flags);
1080
1081 r = put_user(value, (uint32_t *)buf);
1082 if (r)
1083 return r;
1084
1085 result += 4;
1086 buf += 4;
1087 *pos += 4;
1088 size -= 4;
1089 }
1090
1091 return result;
1092}
1093
1094static const struct file_operations radeon_ttm_vram_fops = {
1095 .owner = THIS_MODULE,
1096 .open = radeon_ttm_vram_open,
1097 .read = radeon_ttm_vram_read,
1098 .llseek = default_llseek
1099};
1100
1101static int radeon_ttm_gtt_open(struct inode *inode, struct file *filep)
1102{
1103 struct radeon_device *rdev = inode->i_private;
1104 i_size_write(inode, rdev->mc.gtt_size);
1105 filep->private_data = inode->i_private;
1106 return 0;
1107}
1108
1109static ssize_t radeon_ttm_gtt_read(struct file *f, char __user *buf,
1110 size_t size, loff_t *pos)
1111{
1112 struct radeon_device *rdev = f->private_data;
1113 ssize_t result = 0;
1114 int r;
1115
1116 while (size) {
1117 loff_t p = *pos / PAGE_SIZE;
1118 unsigned off = *pos & ~PAGE_MASK;
1119 size_t cur_size = min_t(size_t, size, PAGE_SIZE - off);
1120 struct page *page;
1121 void *ptr;
1122
1123 if (p >= rdev->gart.num_cpu_pages)
1124 return result;
1125
1126 page = rdev->gart.pages[p];
1127 if (page) {
1128 ptr = kmap(page);
1129 ptr += off;
1130
1131 r = copy_to_user(buf, ptr, cur_size);
1132 kunmap(rdev->gart.pages[p]);
1133 } else
1134 r = clear_user(buf, cur_size);
1135
1136 if (r)
1137 return -EFAULT;
1138
1139 result += cur_size;
1140 buf += cur_size;
1141 *pos += cur_size;
1142 size -= cur_size;
1143 }
1144
1145 return result;
1146}
1147
1148static const struct file_operations radeon_ttm_gtt_fops = {
1149 .owner = THIS_MODULE,
1150 .open = radeon_ttm_gtt_open,
1151 .read = radeon_ttm_gtt_read,
1152 .llseek = default_llseek
1153};
1154
1155#endif
1156
1157static int radeon_ttm_debugfs_init(struct radeon_device *rdev)
1158{
1159#if defined(CONFIG_DEBUG_FS)
1160 unsigned count;
1161
1162 struct drm_minor *minor = rdev->ddev->primary;
1163 struct dentry *ent, *root = minor->debugfs_root;
1164
1165 ent = debugfs_create_file("radeon_vram", S_IFREG | S_IRUGO, root,
1166 rdev, &radeon_ttm_vram_fops);
1167 if (IS_ERR(ent))
1168 return PTR_ERR(ent);
1169 rdev->mman.vram = ent;
1170
1171 ent = debugfs_create_file("radeon_gtt", S_IFREG | S_IRUGO, root,
1172 rdev, &radeon_ttm_gtt_fops);
1173 if (IS_ERR(ent))
1174 return PTR_ERR(ent);
1175 rdev->mman.gtt = ent;
1176
1177 count = ARRAY_SIZE(radeon_ttm_debugfs_list);
1178
1179#ifdef CONFIG_SWIOTLB
1180 if (!swiotlb_nr_tbl())
1181 --count;
1182#endif
1183
1184 return radeon_debugfs_add_files(rdev, radeon_ttm_debugfs_list, count);
1185#else
1186
1187 return 0;
1188#endif
1189}
1190
1191static void radeon_ttm_debugfs_fini(struct radeon_device *rdev)
1192{
1193#if defined(CONFIG_DEBUG_FS)
1194
1195 debugfs_remove(rdev->mman.vram);
1196 rdev->mman.vram = NULL;
1197
1198 debugfs_remove(rdev->mman.gtt);
1199 rdev->mman.gtt = NULL;
1200#endif
1201}
1/*
2 * Copyright 2009 Jerome Glisse.
3 * All Rights Reserved.
4 *
5 * Permission is hereby granted, free of charge, to any person obtaining a
6 * copy of this software and associated documentation files (the
7 * "Software"), to deal in the Software without restriction, including
8 * without limitation the rights to use, copy, modify, merge, publish,
9 * distribute, sub license, and/or sell copies of the Software, and to
10 * permit persons to whom the Software is furnished to do so, subject to
11 * the following conditions:
12 *
13 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
14 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
15 * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL
16 * THE COPYRIGHT HOLDERS, AUTHORS AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM,
17 * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
18 * OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
19 * USE OR OTHER DEALINGS IN THE SOFTWARE.
20 *
21 * The above copyright notice and this permission notice (including the
22 * next paragraph) shall be included in all copies or substantial portions
23 * of the Software.
24 *
25 */
26/*
27 * Authors:
28 * Jerome Glisse <glisse@freedesktop.org>
29 * Thomas Hellstrom <thomas-at-tungstengraphics-dot-com>
30 * Dave Airlie
31 */
32#include <drm/ttm/ttm_bo_api.h>
33#include <drm/ttm/ttm_bo_driver.h>
34#include <drm/ttm/ttm_placement.h>
35#include <drm/ttm/ttm_module.h>
36#include <drm/ttm/ttm_page_alloc.h>
37#include <drm/drmP.h>
38#include <drm/radeon_drm.h>
39#include <linux/seq_file.h>
40#include <linux/slab.h>
41#include <linux/swiotlb.h>
42#include <linux/swap.h>
43#include <linux/pagemap.h>
44#include <linux/debugfs.h>
45#include "radeon_reg.h"
46#include "radeon.h"
47
48#define DRM_FILE_PAGE_OFFSET (0x100000000ULL >> PAGE_SHIFT)
49
50static int radeon_ttm_debugfs_init(struct radeon_device *rdev);
51static void radeon_ttm_debugfs_fini(struct radeon_device *rdev);
52
53static struct radeon_device *radeon_get_rdev(struct ttm_bo_device *bdev)
54{
55 struct radeon_mman *mman;
56 struct radeon_device *rdev;
57
58 mman = container_of(bdev, struct radeon_mman, bdev);
59 rdev = container_of(mman, struct radeon_device, mman);
60 return rdev;
61}
62
63
64/*
65 * Global memory.
66 */
67static int radeon_ttm_mem_global_init(struct drm_global_reference *ref)
68{
69 return ttm_mem_global_init(ref->object);
70}
71
72static void radeon_ttm_mem_global_release(struct drm_global_reference *ref)
73{
74 ttm_mem_global_release(ref->object);
75}
76
77static int radeon_ttm_global_init(struct radeon_device *rdev)
78{
79 struct drm_global_reference *global_ref;
80 int r;
81
82 rdev->mman.mem_global_referenced = false;
83 global_ref = &rdev->mman.mem_global_ref;
84 global_ref->global_type = DRM_GLOBAL_TTM_MEM;
85 global_ref->size = sizeof(struct ttm_mem_global);
86 global_ref->init = &radeon_ttm_mem_global_init;
87 global_ref->release = &radeon_ttm_mem_global_release;
88 r = drm_global_item_ref(global_ref);
89 if (r != 0) {
90 DRM_ERROR("Failed setting up TTM memory accounting "
91 "subsystem.\n");
92 return r;
93 }
94
95 rdev->mman.bo_global_ref.mem_glob =
96 rdev->mman.mem_global_ref.object;
97 global_ref = &rdev->mman.bo_global_ref.ref;
98 global_ref->global_type = DRM_GLOBAL_TTM_BO;
99 global_ref->size = sizeof(struct ttm_bo_global);
100 global_ref->init = &ttm_bo_global_init;
101 global_ref->release = &ttm_bo_global_release;
102 r = drm_global_item_ref(global_ref);
103 if (r != 0) {
104 DRM_ERROR("Failed setting up TTM BO subsystem.\n");
105 drm_global_item_unref(&rdev->mman.mem_global_ref);
106 return r;
107 }
108
109 rdev->mman.mem_global_referenced = true;
110 return 0;
111}
112
113static void radeon_ttm_global_fini(struct radeon_device *rdev)
114{
115 if (rdev->mman.mem_global_referenced) {
116 drm_global_item_unref(&rdev->mman.bo_global_ref.ref);
117 drm_global_item_unref(&rdev->mman.mem_global_ref);
118 rdev->mman.mem_global_referenced = false;
119 }
120}
121
122static int radeon_invalidate_caches(struct ttm_bo_device *bdev, uint32_t flags)
123{
124 return 0;
125}
126
127static int radeon_init_mem_type(struct ttm_bo_device *bdev, uint32_t type,
128 struct ttm_mem_type_manager *man)
129{
130 struct radeon_device *rdev;
131
132 rdev = radeon_get_rdev(bdev);
133
134 switch (type) {
135 case TTM_PL_SYSTEM:
136 /* System memory */
137 man->flags = TTM_MEMTYPE_FLAG_MAPPABLE;
138 man->available_caching = TTM_PL_MASK_CACHING;
139 man->default_caching = TTM_PL_FLAG_CACHED;
140 break;
141 case TTM_PL_TT:
142 man->func = &ttm_bo_manager_func;
143 man->gpu_offset = rdev->mc.gtt_start;
144 man->available_caching = TTM_PL_MASK_CACHING;
145 man->default_caching = TTM_PL_FLAG_CACHED;
146 man->flags = TTM_MEMTYPE_FLAG_MAPPABLE | TTM_MEMTYPE_FLAG_CMA;
147#if IS_ENABLED(CONFIG_AGP)
148 if (rdev->flags & RADEON_IS_AGP) {
149 if (!rdev->ddev->agp) {
150 DRM_ERROR("AGP is not enabled for memory type %u\n",
151 (unsigned)type);
152 return -EINVAL;
153 }
154 if (!rdev->ddev->agp->cant_use_aperture)
155 man->flags = TTM_MEMTYPE_FLAG_MAPPABLE;
156 man->available_caching = TTM_PL_FLAG_UNCACHED |
157 TTM_PL_FLAG_WC;
158 man->default_caching = TTM_PL_FLAG_WC;
159 }
160#endif
161 break;
162 case TTM_PL_VRAM:
163 /* "On-card" video ram */
164 man->func = &ttm_bo_manager_func;
165 man->gpu_offset = rdev->mc.vram_start;
166 man->flags = TTM_MEMTYPE_FLAG_FIXED |
167 TTM_MEMTYPE_FLAG_MAPPABLE;
168 man->available_caching = TTM_PL_FLAG_UNCACHED | TTM_PL_FLAG_WC;
169 man->default_caching = TTM_PL_FLAG_WC;
170 break;
171 default:
172 DRM_ERROR("Unsupported memory type %u\n", (unsigned)type);
173 return -EINVAL;
174 }
175 return 0;
176}
177
178static void radeon_evict_flags(struct ttm_buffer_object *bo,
179 struct ttm_placement *placement)
180{
181 static const struct ttm_place placements = {
182 .fpfn = 0,
183 .lpfn = 0,
184 .flags = TTM_PL_MASK_CACHING | TTM_PL_FLAG_SYSTEM
185 };
186
187 struct radeon_bo *rbo;
188
189 if (!radeon_ttm_bo_is_radeon_bo(bo)) {
190 placement->placement = &placements;
191 placement->busy_placement = &placements;
192 placement->num_placement = 1;
193 placement->num_busy_placement = 1;
194 return;
195 }
196 rbo = container_of(bo, struct radeon_bo, tbo);
197 switch (bo->mem.mem_type) {
198 case TTM_PL_VRAM:
199 if (rbo->rdev->ring[radeon_copy_ring_index(rbo->rdev)].ready == false)
200 radeon_ttm_placement_from_domain(rbo, RADEON_GEM_DOMAIN_CPU);
201 else if (rbo->rdev->mc.visible_vram_size < rbo->rdev->mc.real_vram_size &&
202 bo->mem.start < (rbo->rdev->mc.visible_vram_size >> PAGE_SHIFT)) {
203 unsigned fpfn = rbo->rdev->mc.visible_vram_size >> PAGE_SHIFT;
204 int i;
205
206 /* Try evicting to the CPU inaccessible part of VRAM
207 * first, but only set GTT as busy placement, so this
208 * BO will be evicted to GTT rather than causing other
209 * BOs to be evicted from VRAM
210 */
211 radeon_ttm_placement_from_domain(rbo, RADEON_GEM_DOMAIN_VRAM |
212 RADEON_GEM_DOMAIN_GTT);
213 rbo->placement.num_busy_placement = 0;
214 for (i = 0; i < rbo->placement.num_placement; i++) {
215 if (rbo->placements[i].flags & TTM_PL_FLAG_VRAM) {
216 if (rbo->placements[i].fpfn < fpfn)
217 rbo->placements[i].fpfn = fpfn;
218 } else {
219 rbo->placement.busy_placement =
220 &rbo->placements[i];
221 rbo->placement.num_busy_placement = 1;
222 }
223 }
224 } else
225 radeon_ttm_placement_from_domain(rbo, RADEON_GEM_DOMAIN_GTT);
226 break;
227 case TTM_PL_TT:
228 default:
229 radeon_ttm_placement_from_domain(rbo, RADEON_GEM_DOMAIN_CPU);
230 }
231 *placement = rbo->placement;
232}
233
234static int radeon_verify_access(struct ttm_buffer_object *bo, struct file *filp)
235{
236 struct radeon_bo *rbo = container_of(bo, struct radeon_bo, tbo);
237
238 if (radeon_ttm_tt_has_userptr(bo->ttm))
239 return -EPERM;
240 return drm_vma_node_verify_access(&rbo->gem_base.vma_node,
241 filp->private_data);
242}
243
244static void radeon_move_null(struct ttm_buffer_object *bo,
245 struct ttm_mem_reg *new_mem)
246{
247 struct ttm_mem_reg *old_mem = &bo->mem;
248
249 BUG_ON(old_mem->mm_node != NULL);
250 *old_mem = *new_mem;
251 new_mem->mm_node = NULL;
252}
253
254static int radeon_move_blit(struct ttm_buffer_object *bo,
255 bool evict, bool no_wait_gpu,
256 struct ttm_mem_reg *new_mem,
257 struct ttm_mem_reg *old_mem)
258{
259 struct radeon_device *rdev;
260 uint64_t old_start, new_start;
261 struct radeon_fence *fence;
262 unsigned num_pages;
263 int r, ridx;
264
265 rdev = radeon_get_rdev(bo->bdev);
266 ridx = radeon_copy_ring_index(rdev);
267 old_start = (u64)old_mem->start << PAGE_SHIFT;
268 new_start = (u64)new_mem->start << PAGE_SHIFT;
269
270 switch (old_mem->mem_type) {
271 case TTM_PL_VRAM:
272 old_start += rdev->mc.vram_start;
273 break;
274 case TTM_PL_TT:
275 old_start += rdev->mc.gtt_start;
276 break;
277 default:
278 DRM_ERROR("Unknown placement %d\n", old_mem->mem_type);
279 return -EINVAL;
280 }
281 switch (new_mem->mem_type) {
282 case TTM_PL_VRAM:
283 new_start += rdev->mc.vram_start;
284 break;
285 case TTM_PL_TT:
286 new_start += rdev->mc.gtt_start;
287 break;
288 default:
289 DRM_ERROR("Unknown placement %d\n", old_mem->mem_type);
290 return -EINVAL;
291 }
292 if (!rdev->ring[ridx].ready) {
293 DRM_ERROR("Trying to move memory with ring turned off.\n");
294 return -EINVAL;
295 }
296
297 BUILD_BUG_ON((PAGE_SIZE % RADEON_GPU_PAGE_SIZE) != 0);
298
299 num_pages = new_mem->num_pages * (PAGE_SIZE / RADEON_GPU_PAGE_SIZE);
300 fence = radeon_copy(rdev, old_start, new_start, num_pages, bo->resv);
301 if (IS_ERR(fence))
302 return PTR_ERR(fence);
303
304 r = ttm_bo_move_accel_cleanup(bo, &fence->base, evict, new_mem);
305 radeon_fence_unref(&fence);
306 return r;
307}
308
309static int radeon_move_vram_ram(struct ttm_buffer_object *bo,
310 bool evict, bool interruptible,
311 bool no_wait_gpu,
312 struct ttm_mem_reg *new_mem)
313{
314 struct ttm_operation_ctx ctx = { interruptible, no_wait_gpu };
315 struct radeon_device *rdev;
316 struct ttm_mem_reg *old_mem = &bo->mem;
317 struct ttm_mem_reg tmp_mem;
318 struct ttm_place placements;
319 struct ttm_placement placement;
320 int r;
321
322 rdev = radeon_get_rdev(bo->bdev);
323 tmp_mem = *new_mem;
324 tmp_mem.mm_node = NULL;
325 placement.num_placement = 1;
326 placement.placement = &placements;
327 placement.num_busy_placement = 1;
328 placement.busy_placement = &placements;
329 placements.fpfn = 0;
330 placements.lpfn = 0;
331 placements.flags = TTM_PL_MASK_CACHING | TTM_PL_FLAG_TT;
332 r = ttm_bo_mem_space(bo, &placement, &tmp_mem, &ctx);
333 if (unlikely(r)) {
334 return r;
335 }
336
337 r = ttm_tt_set_placement_caching(bo->ttm, tmp_mem.placement);
338 if (unlikely(r)) {
339 goto out_cleanup;
340 }
341
342 r = ttm_tt_bind(bo->ttm, &tmp_mem, &ctx);
343 if (unlikely(r)) {
344 goto out_cleanup;
345 }
346 r = radeon_move_blit(bo, true, no_wait_gpu, &tmp_mem, old_mem);
347 if (unlikely(r)) {
348 goto out_cleanup;
349 }
350 r = ttm_bo_move_ttm(bo, &ctx, new_mem);
351out_cleanup:
352 ttm_bo_mem_put(bo, &tmp_mem);
353 return r;
354}
355
356static int radeon_move_ram_vram(struct ttm_buffer_object *bo,
357 bool evict, bool interruptible,
358 bool no_wait_gpu,
359 struct ttm_mem_reg *new_mem)
360{
361 struct ttm_operation_ctx ctx = { interruptible, no_wait_gpu };
362 struct radeon_device *rdev;
363 struct ttm_mem_reg *old_mem = &bo->mem;
364 struct ttm_mem_reg tmp_mem;
365 struct ttm_placement placement;
366 struct ttm_place placements;
367 int r;
368
369 rdev = radeon_get_rdev(bo->bdev);
370 tmp_mem = *new_mem;
371 tmp_mem.mm_node = NULL;
372 placement.num_placement = 1;
373 placement.placement = &placements;
374 placement.num_busy_placement = 1;
375 placement.busy_placement = &placements;
376 placements.fpfn = 0;
377 placements.lpfn = 0;
378 placements.flags = TTM_PL_MASK_CACHING | TTM_PL_FLAG_TT;
379 r = ttm_bo_mem_space(bo, &placement, &tmp_mem, &ctx);
380 if (unlikely(r)) {
381 return r;
382 }
383 r = ttm_bo_move_ttm(bo, &ctx, &tmp_mem);
384 if (unlikely(r)) {
385 goto out_cleanup;
386 }
387 r = radeon_move_blit(bo, true, no_wait_gpu, new_mem, old_mem);
388 if (unlikely(r)) {
389 goto out_cleanup;
390 }
391out_cleanup:
392 ttm_bo_mem_put(bo, &tmp_mem);
393 return r;
394}
395
396static int radeon_bo_move(struct ttm_buffer_object *bo, bool evict,
397 struct ttm_operation_ctx *ctx,
398 struct ttm_mem_reg *new_mem)
399{
400 struct radeon_device *rdev;
401 struct radeon_bo *rbo;
402 struct ttm_mem_reg *old_mem = &bo->mem;
403 int r;
404
405 r = ttm_bo_wait(bo, ctx->interruptible, ctx->no_wait_gpu);
406 if (r)
407 return r;
408
409 /* Can't move a pinned BO */
410 rbo = container_of(bo, struct radeon_bo, tbo);
411 if (WARN_ON_ONCE(rbo->pin_count > 0))
412 return -EINVAL;
413
414 rdev = radeon_get_rdev(bo->bdev);
415 if (old_mem->mem_type == TTM_PL_SYSTEM && bo->ttm == NULL) {
416 radeon_move_null(bo, new_mem);
417 return 0;
418 }
419 if ((old_mem->mem_type == TTM_PL_TT &&
420 new_mem->mem_type == TTM_PL_SYSTEM) ||
421 (old_mem->mem_type == TTM_PL_SYSTEM &&
422 new_mem->mem_type == TTM_PL_TT)) {
423 /* bind is enough */
424 radeon_move_null(bo, new_mem);
425 return 0;
426 }
427 if (!rdev->ring[radeon_copy_ring_index(rdev)].ready ||
428 rdev->asic->copy.copy == NULL) {
429 /* use memcpy */
430 goto memcpy;
431 }
432
433 if (old_mem->mem_type == TTM_PL_VRAM &&
434 new_mem->mem_type == TTM_PL_SYSTEM) {
435 r = radeon_move_vram_ram(bo, evict, ctx->interruptible,
436 ctx->no_wait_gpu, new_mem);
437 } else if (old_mem->mem_type == TTM_PL_SYSTEM &&
438 new_mem->mem_type == TTM_PL_VRAM) {
439 r = radeon_move_ram_vram(bo, evict, ctx->interruptible,
440 ctx->no_wait_gpu, new_mem);
441 } else {
442 r = radeon_move_blit(bo, evict, ctx->no_wait_gpu,
443 new_mem, old_mem);
444 }
445
446 if (r) {
447memcpy:
448 r = ttm_bo_move_memcpy(bo, ctx, new_mem);
449 if (r) {
450 return r;
451 }
452 }
453
454 /* update statistics */
455 atomic64_add((u64)bo->num_pages << PAGE_SHIFT, &rdev->num_bytes_moved);
456 return 0;
457}
458
459static int radeon_ttm_io_mem_reserve(struct ttm_bo_device *bdev, struct ttm_mem_reg *mem)
460{
461 struct ttm_mem_type_manager *man = &bdev->man[mem->mem_type];
462 struct radeon_device *rdev = radeon_get_rdev(bdev);
463
464 mem->bus.addr = NULL;
465 mem->bus.offset = 0;
466 mem->bus.size = mem->num_pages << PAGE_SHIFT;
467 mem->bus.base = 0;
468 mem->bus.is_iomem = false;
469 if (!(man->flags & TTM_MEMTYPE_FLAG_MAPPABLE))
470 return -EINVAL;
471 switch (mem->mem_type) {
472 case TTM_PL_SYSTEM:
473 /* system memory */
474 return 0;
475 case TTM_PL_TT:
476#if IS_ENABLED(CONFIG_AGP)
477 if (rdev->flags & RADEON_IS_AGP) {
478 /* RADEON_IS_AGP is set only if AGP is active */
479 mem->bus.offset = mem->start << PAGE_SHIFT;
480 mem->bus.base = rdev->mc.agp_base;
481 mem->bus.is_iomem = !rdev->ddev->agp->cant_use_aperture;
482 }
483#endif
484 break;
485 case TTM_PL_VRAM:
486 mem->bus.offset = mem->start << PAGE_SHIFT;
487 /* check if it's visible */
488 if ((mem->bus.offset + mem->bus.size) > rdev->mc.visible_vram_size)
489 return -EINVAL;
490 mem->bus.base = rdev->mc.aper_base;
491 mem->bus.is_iomem = true;
492#ifdef __alpha__
493 /*
494 * Alpha: use bus.addr to hold the ioremap() return,
495 * so we can modify bus.base below.
496 */
497 if (mem->placement & TTM_PL_FLAG_WC)
498 mem->bus.addr =
499 ioremap_wc(mem->bus.base + mem->bus.offset,
500 mem->bus.size);
501 else
502 mem->bus.addr =
503 ioremap_nocache(mem->bus.base + mem->bus.offset,
504 mem->bus.size);
505 if (!mem->bus.addr)
506 return -ENOMEM;
507
508 /*
509 * Alpha: Use just the bus offset plus
510 * the hose/domain memory base for bus.base.
511 * It then can be used to build PTEs for VRAM
512 * access, as done in ttm_bo_vm_fault().
513 */
514 mem->bus.base = (mem->bus.base & 0x0ffffffffUL) +
515 rdev->ddev->hose->dense_mem_base;
516#endif
517 break;
518 default:
519 return -EINVAL;
520 }
521 return 0;
522}
523
524static void radeon_ttm_io_mem_free(struct ttm_bo_device *bdev, struct ttm_mem_reg *mem)
525{
526}
527
528/*
529 * TTM backend functions.
530 */
531struct radeon_ttm_tt {
532 struct ttm_dma_tt ttm;
533 struct radeon_device *rdev;
534 u64 offset;
535
536 uint64_t userptr;
537 struct mm_struct *usermm;
538 uint32_t userflags;
539};
540
541/* prepare the sg table with the user pages */
542static int radeon_ttm_tt_pin_userptr(struct ttm_tt *ttm)
543{
544 struct radeon_device *rdev = radeon_get_rdev(ttm->bdev);
545 struct radeon_ttm_tt *gtt = (void *)ttm;
546 unsigned pinned = 0, nents;
547 int r;
548
549 int write = !(gtt->userflags & RADEON_GEM_USERPTR_READONLY);
550 enum dma_data_direction direction = write ?
551 DMA_BIDIRECTIONAL : DMA_TO_DEVICE;
552
553 if (current->mm != gtt->usermm)
554 return -EPERM;
555
556 if (gtt->userflags & RADEON_GEM_USERPTR_ANONONLY) {
557 /* check that we only pin down anonymous memory
558 to prevent problems with writeback */
559 unsigned long end = gtt->userptr + ttm->num_pages * PAGE_SIZE;
560 struct vm_area_struct *vma;
561 vma = find_vma(gtt->usermm, gtt->userptr);
562 if (!vma || vma->vm_file || vma->vm_end < end)
563 return -EPERM;
564 }
565
566 do {
567 unsigned num_pages = ttm->num_pages - pinned;
568 uint64_t userptr = gtt->userptr + pinned * PAGE_SIZE;
569 struct page **pages = ttm->pages + pinned;
570
571 r = get_user_pages(userptr, num_pages, write ? FOLL_WRITE : 0,
572 pages, NULL);
573 if (r < 0)
574 goto release_pages;
575
576 pinned += r;
577
578 } while (pinned < ttm->num_pages);
579
580 r = sg_alloc_table_from_pages(ttm->sg, ttm->pages, ttm->num_pages, 0,
581 ttm->num_pages << PAGE_SHIFT,
582 GFP_KERNEL);
583 if (r)
584 goto release_sg;
585
586 r = -ENOMEM;
587 nents = dma_map_sg(rdev->dev, ttm->sg->sgl, ttm->sg->nents, direction);
588 if (nents != ttm->sg->nents)
589 goto release_sg;
590
591 drm_prime_sg_to_page_addr_arrays(ttm->sg, ttm->pages,
592 gtt->ttm.dma_address, ttm->num_pages);
593
594 return 0;
595
596release_sg:
597 kfree(ttm->sg);
598
599release_pages:
600 release_pages(ttm->pages, pinned);
601 return r;
602}
603
604static void radeon_ttm_tt_unpin_userptr(struct ttm_tt *ttm)
605{
606 struct radeon_device *rdev = radeon_get_rdev(ttm->bdev);
607 struct radeon_ttm_tt *gtt = (void *)ttm;
608 struct sg_page_iter sg_iter;
609
610 int write = !(gtt->userflags & RADEON_GEM_USERPTR_READONLY);
611 enum dma_data_direction direction = write ?
612 DMA_BIDIRECTIONAL : DMA_TO_DEVICE;
613
614 /* double check that we don't free the table twice */
615 if (!ttm->sg->sgl)
616 return;
617
618 /* free the sg table and pages again */
619 dma_unmap_sg(rdev->dev, ttm->sg->sgl, ttm->sg->nents, direction);
620
621 for_each_sg_page(ttm->sg->sgl, &sg_iter, ttm->sg->nents, 0) {
622 struct page *page = sg_page_iter_page(&sg_iter);
623 if (!(gtt->userflags & RADEON_GEM_USERPTR_READONLY))
624 set_page_dirty(page);
625
626 mark_page_accessed(page);
627 put_page(page);
628 }
629
630 sg_free_table(ttm->sg);
631}
632
633static int radeon_ttm_backend_bind(struct ttm_tt *ttm,
634 struct ttm_mem_reg *bo_mem)
635{
636 struct radeon_ttm_tt *gtt = (void*)ttm;
637 uint32_t flags = RADEON_GART_PAGE_VALID | RADEON_GART_PAGE_READ |
638 RADEON_GART_PAGE_WRITE;
639 int r;
640
641 if (gtt->userptr) {
642 radeon_ttm_tt_pin_userptr(ttm);
643 flags &= ~RADEON_GART_PAGE_WRITE;
644 }
645
646 gtt->offset = (unsigned long)(bo_mem->start << PAGE_SHIFT);
647 if (!ttm->num_pages) {
648 WARN(1, "nothing to bind %lu pages for mreg %p back %p!\n",
649 ttm->num_pages, bo_mem, ttm);
650 }
651 if (ttm->caching_state == tt_cached)
652 flags |= RADEON_GART_PAGE_SNOOP;
653 r = radeon_gart_bind(gtt->rdev, gtt->offset, ttm->num_pages,
654 ttm->pages, gtt->ttm.dma_address, flags);
655 if (r) {
656 DRM_ERROR("failed to bind %lu pages at 0x%08X\n",
657 ttm->num_pages, (unsigned)gtt->offset);
658 return r;
659 }
660 return 0;
661}
662
663static int radeon_ttm_backend_unbind(struct ttm_tt *ttm)
664{
665 struct radeon_ttm_tt *gtt = (void *)ttm;
666
667 radeon_gart_unbind(gtt->rdev, gtt->offset, ttm->num_pages);
668
669 if (gtt->userptr)
670 radeon_ttm_tt_unpin_userptr(ttm);
671
672 return 0;
673}
674
675static void radeon_ttm_backend_destroy(struct ttm_tt *ttm)
676{
677 struct radeon_ttm_tt *gtt = (void *)ttm;
678
679 ttm_dma_tt_fini(>t->ttm);
680 kfree(gtt);
681}
682
683static struct ttm_backend_func radeon_backend_func = {
684 .bind = &radeon_ttm_backend_bind,
685 .unbind = &radeon_ttm_backend_unbind,
686 .destroy = &radeon_ttm_backend_destroy,
687};
688
689static struct ttm_tt *radeon_ttm_tt_create(struct ttm_buffer_object *bo,
690 uint32_t page_flags)
691{
692 struct radeon_device *rdev;
693 struct radeon_ttm_tt *gtt;
694
695 rdev = radeon_get_rdev(bo->bdev);
696#if IS_ENABLED(CONFIG_AGP)
697 if (rdev->flags & RADEON_IS_AGP) {
698 return ttm_agp_tt_create(bo, rdev->ddev->agp->bridge,
699 page_flags);
700 }
701#endif
702
703 gtt = kzalloc(sizeof(struct radeon_ttm_tt), GFP_KERNEL);
704 if (gtt == NULL) {
705 return NULL;
706 }
707 gtt->ttm.ttm.func = &radeon_backend_func;
708 gtt->rdev = rdev;
709 if (ttm_dma_tt_init(>t->ttm, bo, page_flags)) {
710 kfree(gtt);
711 return NULL;
712 }
713 return >t->ttm.ttm;
714}
715
716static struct radeon_ttm_tt *radeon_ttm_tt_to_gtt(struct ttm_tt *ttm)
717{
718 if (!ttm || ttm->func != &radeon_backend_func)
719 return NULL;
720 return (struct radeon_ttm_tt *)ttm;
721}
722
723static int radeon_ttm_tt_populate(struct ttm_tt *ttm,
724 struct ttm_operation_ctx *ctx)
725{
726 struct radeon_ttm_tt *gtt = radeon_ttm_tt_to_gtt(ttm);
727 struct radeon_device *rdev;
728 bool slave = !!(ttm->page_flags & TTM_PAGE_FLAG_SG);
729
730 if (gtt && gtt->userptr) {
731 ttm->sg = kzalloc(sizeof(struct sg_table), GFP_KERNEL);
732 if (!ttm->sg)
733 return -ENOMEM;
734
735 ttm->page_flags |= TTM_PAGE_FLAG_SG;
736 ttm->state = tt_unbound;
737 return 0;
738 }
739
740 if (slave && ttm->sg) {
741 drm_prime_sg_to_page_addr_arrays(ttm->sg, ttm->pages,
742 gtt->ttm.dma_address, ttm->num_pages);
743 ttm->state = tt_unbound;
744 return 0;
745 }
746
747 rdev = radeon_get_rdev(ttm->bdev);
748#if IS_ENABLED(CONFIG_AGP)
749 if (rdev->flags & RADEON_IS_AGP) {
750 return ttm_agp_tt_populate(ttm, ctx);
751 }
752#endif
753
754#ifdef CONFIG_SWIOTLB
755 if (rdev->need_swiotlb && swiotlb_nr_tbl()) {
756 return ttm_dma_populate(>t->ttm, rdev->dev, ctx);
757 }
758#endif
759
760 return ttm_populate_and_map_pages(rdev->dev, >t->ttm, ctx);
761}
762
763static void radeon_ttm_tt_unpopulate(struct ttm_tt *ttm)
764{
765 struct radeon_device *rdev;
766 struct radeon_ttm_tt *gtt = radeon_ttm_tt_to_gtt(ttm);
767 bool slave = !!(ttm->page_flags & TTM_PAGE_FLAG_SG);
768
769 if (gtt && gtt->userptr) {
770 kfree(ttm->sg);
771 ttm->page_flags &= ~TTM_PAGE_FLAG_SG;
772 return;
773 }
774
775 if (slave)
776 return;
777
778 rdev = radeon_get_rdev(ttm->bdev);
779#if IS_ENABLED(CONFIG_AGP)
780 if (rdev->flags & RADEON_IS_AGP) {
781 ttm_agp_tt_unpopulate(ttm);
782 return;
783 }
784#endif
785
786#ifdef CONFIG_SWIOTLB
787 if (rdev->need_swiotlb && swiotlb_nr_tbl()) {
788 ttm_dma_unpopulate(>t->ttm, rdev->dev);
789 return;
790 }
791#endif
792
793 ttm_unmap_and_unpopulate_pages(rdev->dev, >t->ttm);
794}
795
796int radeon_ttm_tt_set_userptr(struct ttm_tt *ttm, uint64_t addr,
797 uint32_t flags)
798{
799 struct radeon_ttm_tt *gtt = radeon_ttm_tt_to_gtt(ttm);
800
801 if (gtt == NULL)
802 return -EINVAL;
803
804 gtt->userptr = addr;
805 gtt->usermm = current->mm;
806 gtt->userflags = flags;
807 return 0;
808}
809
810bool radeon_ttm_tt_has_userptr(struct ttm_tt *ttm)
811{
812 struct radeon_ttm_tt *gtt = radeon_ttm_tt_to_gtt(ttm);
813
814 if (gtt == NULL)
815 return false;
816
817 return !!gtt->userptr;
818}
819
820bool radeon_ttm_tt_is_readonly(struct ttm_tt *ttm)
821{
822 struct radeon_ttm_tt *gtt = radeon_ttm_tt_to_gtt(ttm);
823
824 if (gtt == NULL)
825 return false;
826
827 return !!(gtt->userflags & RADEON_GEM_USERPTR_READONLY);
828}
829
830static struct ttm_bo_driver radeon_bo_driver = {
831 .ttm_tt_create = &radeon_ttm_tt_create,
832 .ttm_tt_populate = &radeon_ttm_tt_populate,
833 .ttm_tt_unpopulate = &radeon_ttm_tt_unpopulate,
834 .invalidate_caches = &radeon_invalidate_caches,
835 .init_mem_type = &radeon_init_mem_type,
836 .eviction_valuable = ttm_bo_eviction_valuable,
837 .evict_flags = &radeon_evict_flags,
838 .move = &radeon_bo_move,
839 .verify_access = &radeon_verify_access,
840 .move_notify = &radeon_bo_move_notify,
841 .fault_reserve_notify = &radeon_bo_fault_reserve_notify,
842 .io_mem_reserve = &radeon_ttm_io_mem_reserve,
843 .io_mem_free = &radeon_ttm_io_mem_free,
844};
845
846int radeon_ttm_init(struct radeon_device *rdev)
847{
848 int r;
849
850 r = radeon_ttm_global_init(rdev);
851 if (r) {
852 return r;
853 }
854 /* No others user of address space so set it to 0 */
855 r = ttm_bo_device_init(&rdev->mman.bdev,
856 rdev->mman.bo_global_ref.ref.object,
857 &radeon_bo_driver,
858 rdev->ddev->anon_inode->i_mapping,
859 DRM_FILE_PAGE_OFFSET,
860 rdev->need_dma32);
861 if (r) {
862 DRM_ERROR("failed initializing buffer object driver(%d).\n", r);
863 return r;
864 }
865 rdev->mman.initialized = true;
866 r = ttm_bo_init_mm(&rdev->mman.bdev, TTM_PL_VRAM,
867 rdev->mc.real_vram_size >> PAGE_SHIFT);
868 if (r) {
869 DRM_ERROR("Failed initializing VRAM heap.\n");
870 return r;
871 }
872 /* Change the size here instead of the init above so only lpfn is affected */
873 radeon_ttm_set_active_vram_size(rdev, rdev->mc.visible_vram_size);
874
875 r = radeon_bo_create(rdev, 256 * 1024, PAGE_SIZE, true,
876 RADEON_GEM_DOMAIN_VRAM, 0, NULL,
877 NULL, &rdev->stolen_vga_memory);
878 if (r) {
879 return r;
880 }
881 r = radeon_bo_reserve(rdev->stolen_vga_memory, false);
882 if (r)
883 return r;
884 r = radeon_bo_pin(rdev->stolen_vga_memory, RADEON_GEM_DOMAIN_VRAM, NULL);
885 radeon_bo_unreserve(rdev->stolen_vga_memory);
886 if (r) {
887 radeon_bo_unref(&rdev->stolen_vga_memory);
888 return r;
889 }
890 DRM_INFO("radeon: %uM of VRAM memory ready\n",
891 (unsigned) (rdev->mc.real_vram_size / (1024 * 1024)));
892 r = ttm_bo_init_mm(&rdev->mman.bdev, TTM_PL_TT,
893 rdev->mc.gtt_size >> PAGE_SHIFT);
894 if (r) {
895 DRM_ERROR("Failed initializing GTT heap.\n");
896 return r;
897 }
898 DRM_INFO("radeon: %uM of GTT memory ready.\n",
899 (unsigned)(rdev->mc.gtt_size / (1024 * 1024)));
900
901 r = radeon_ttm_debugfs_init(rdev);
902 if (r) {
903 DRM_ERROR("Failed to init debugfs\n");
904 return r;
905 }
906 return 0;
907}
908
909void radeon_ttm_fini(struct radeon_device *rdev)
910{
911 int r;
912
913 if (!rdev->mman.initialized)
914 return;
915 radeon_ttm_debugfs_fini(rdev);
916 if (rdev->stolen_vga_memory) {
917 r = radeon_bo_reserve(rdev->stolen_vga_memory, false);
918 if (r == 0) {
919 radeon_bo_unpin(rdev->stolen_vga_memory);
920 radeon_bo_unreserve(rdev->stolen_vga_memory);
921 }
922 radeon_bo_unref(&rdev->stolen_vga_memory);
923 }
924 ttm_bo_clean_mm(&rdev->mman.bdev, TTM_PL_VRAM);
925 ttm_bo_clean_mm(&rdev->mman.bdev, TTM_PL_TT);
926 ttm_bo_device_release(&rdev->mman.bdev);
927 radeon_gart_fini(rdev);
928 radeon_ttm_global_fini(rdev);
929 rdev->mman.initialized = false;
930 DRM_INFO("radeon: ttm finalized\n");
931}
932
933/* this should only be called at bootup or when userspace
934 * isn't running */
935void radeon_ttm_set_active_vram_size(struct radeon_device *rdev, u64 size)
936{
937 struct ttm_mem_type_manager *man;
938
939 if (!rdev->mman.initialized)
940 return;
941
942 man = &rdev->mman.bdev.man[TTM_PL_VRAM];
943 /* this just adjusts TTM size idea, which sets lpfn to the correct value */
944 man->size = size >> PAGE_SHIFT;
945}
946
947static struct vm_operations_struct radeon_ttm_vm_ops;
948static const struct vm_operations_struct *ttm_vm_ops = NULL;
949
950static int radeon_ttm_fault(struct vm_fault *vmf)
951{
952 struct ttm_buffer_object *bo;
953 struct radeon_device *rdev;
954 int r;
955
956 bo = (struct ttm_buffer_object *)vmf->vma->vm_private_data;
957 if (bo == NULL) {
958 return VM_FAULT_NOPAGE;
959 }
960 rdev = radeon_get_rdev(bo->bdev);
961 down_read(&rdev->pm.mclk_lock);
962 r = ttm_vm_ops->fault(vmf);
963 up_read(&rdev->pm.mclk_lock);
964 return r;
965}
966
967int radeon_mmap(struct file *filp, struct vm_area_struct *vma)
968{
969 struct drm_file *file_priv;
970 struct radeon_device *rdev;
971 int r;
972
973 if (unlikely(vma->vm_pgoff < DRM_FILE_PAGE_OFFSET)) {
974 return -EINVAL;
975 }
976
977 file_priv = filp->private_data;
978 rdev = file_priv->minor->dev->dev_private;
979 if (rdev == NULL) {
980 return -EINVAL;
981 }
982 r = ttm_bo_mmap(filp, vma, &rdev->mman.bdev);
983 if (unlikely(r != 0)) {
984 return r;
985 }
986 if (unlikely(ttm_vm_ops == NULL)) {
987 ttm_vm_ops = vma->vm_ops;
988 radeon_ttm_vm_ops = *ttm_vm_ops;
989 radeon_ttm_vm_ops.fault = &radeon_ttm_fault;
990 }
991 vma->vm_ops = &radeon_ttm_vm_ops;
992 return 0;
993}
994
995#if defined(CONFIG_DEBUG_FS)
996
997static int radeon_mm_dump_table(struct seq_file *m, void *data)
998{
999 struct drm_info_node *node = (struct drm_info_node *)m->private;
1000 unsigned ttm_pl = *(int*)node->info_ent->data;
1001 struct drm_device *dev = node->minor->dev;
1002 struct radeon_device *rdev = dev->dev_private;
1003 struct ttm_mem_type_manager *man = &rdev->mman.bdev.man[ttm_pl];
1004 struct drm_printer p = drm_seq_file_printer(m);
1005
1006 man->func->debug(man, &p);
1007 return 0;
1008}
1009
1010
1011static int ttm_pl_vram = TTM_PL_VRAM;
1012static int ttm_pl_tt = TTM_PL_TT;
1013
1014static struct drm_info_list radeon_ttm_debugfs_list[] = {
1015 {"radeon_vram_mm", radeon_mm_dump_table, 0, &ttm_pl_vram},
1016 {"radeon_gtt_mm", radeon_mm_dump_table, 0, &ttm_pl_tt},
1017 {"ttm_page_pool", ttm_page_alloc_debugfs, 0, NULL},
1018#ifdef CONFIG_SWIOTLB
1019 {"ttm_dma_page_pool", ttm_dma_page_alloc_debugfs, 0, NULL}
1020#endif
1021};
1022
1023static int radeon_ttm_vram_open(struct inode *inode, struct file *filep)
1024{
1025 struct radeon_device *rdev = inode->i_private;
1026 i_size_write(inode, rdev->mc.mc_vram_size);
1027 filep->private_data = inode->i_private;
1028 return 0;
1029}
1030
1031static ssize_t radeon_ttm_vram_read(struct file *f, char __user *buf,
1032 size_t size, loff_t *pos)
1033{
1034 struct radeon_device *rdev = f->private_data;
1035 ssize_t result = 0;
1036 int r;
1037
1038 if (size & 0x3 || *pos & 0x3)
1039 return -EINVAL;
1040
1041 while (size) {
1042 unsigned long flags;
1043 uint32_t value;
1044
1045 if (*pos >= rdev->mc.mc_vram_size)
1046 return result;
1047
1048 spin_lock_irqsave(&rdev->mmio_idx_lock, flags);
1049 WREG32(RADEON_MM_INDEX, ((uint32_t)*pos) | 0x80000000);
1050 if (rdev->family >= CHIP_CEDAR)
1051 WREG32(EVERGREEN_MM_INDEX_HI, *pos >> 31);
1052 value = RREG32(RADEON_MM_DATA);
1053 spin_unlock_irqrestore(&rdev->mmio_idx_lock, flags);
1054
1055 r = put_user(value, (uint32_t *)buf);
1056 if (r)
1057 return r;
1058
1059 result += 4;
1060 buf += 4;
1061 *pos += 4;
1062 size -= 4;
1063 }
1064
1065 return result;
1066}
1067
1068static const struct file_operations radeon_ttm_vram_fops = {
1069 .owner = THIS_MODULE,
1070 .open = radeon_ttm_vram_open,
1071 .read = radeon_ttm_vram_read,
1072 .llseek = default_llseek
1073};
1074
1075static int radeon_ttm_gtt_open(struct inode *inode, struct file *filep)
1076{
1077 struct radeon_device *rdev = inode->i_private;
1078 i_size_write(inode, rdev->mc.gtt_size);
1079 filep->private_data = inode->i_private;
1080 return 0;
1081}
1082
1083static ssize_t radeon_ttm_gtt_read(struct file *f, char __user *buf,
1084 size_t size, loff_t *pos)
1085{
1086 struct radeon_device *rdev = f->private_data;
1087 ssize_t result = 0;
1088 int r;
1089
1090 while (size) {
1091 loff_t p = *pos / PAGE_SIZE;
1092 unsigned off = *pos & ~PAGE_MASK;
1093 size_t cur_size = min_t(size_t, size, PAGE_SIZE - off);
1094 struct page *page;
1095 void *ptr;
1096
1097 if (p >= rdev->gart.num_cpu_pages)
1098 return result;
1099
1100 page = rdev->gart.pages[p];
1101 if (page) {
1102 ptr = kmap(page);
1103 ptr += off;
1104
1105 r = copy_to_user(buf, ptr, cur_size);
1106 kunmap(rdev->gart.pages[p]);
1107 } else
1108 r = clear_user(buf, cur_size);
1109
1110 if (r)
1111 return -EFAULT;
1112
1113 result += cur_size;
1114 buf += cur_size;
1115 *pos += cur_size;
1116 size -= cur_size;
1117 }
1118
1119 return result;
1120}
1121
1122static const struct file_operations radeon_ttm_gtt_fops = {
1123 .owner = THIS_MODULE,
1124 .open = radeon_ttm_gtt_open,
1125 .read = radeon_ttm_gtt_read,
1126 .llseek = default_llseek
1127};
1128
1129#endif
1130
1131static int radeon_ttm_debugfs_init(struct radeon_device *rdev)
1132{
1133#if defined(CONFIG_DEBUG_FS)
1134 unsigned count;
1135
1136 struct drm_minor *minor = rdev->ddev->primary;
1137 struct dentry *ent, *root = minor->debugfs_root;
1138
1139 ent = debugfs_create_file("radeon_vram", S_IFREG | S_IRUGO, root,
1140 rdev, &radeon_ttm_vram_fops);
1141 if (IS_ERR(ent))
1142 return PTR_ERR(ent);
1143 rdev->mman.vram = ent;
1144
1145 ent = debugfs_create_file("radeon_gtt", S_IFREG | S_IRUGO, root,
1146 rdev, &radeon_ttm_gtt_fops);
1147 if (IS_ERR(ent))
1148 return PTR_ERR(ent);
1149 rdev->mman.gtt = ent;
1150
1151 count = ARRAY_SIZE(radeon_ttm_debugfs_list);
1152
1153#ifdef CONFIG_SWIOTLB
1154 if (!(rdev->need_swiotlb && swiotlb_nr_tbl()))
1155 --count;
1156#endif
1157
1158 return radeon_debugfs_add_files(rdev, radeon_ttm_debugfs_list, count);
1159#else
1160
1161 return 0;
1162#endif
1163}
1164
1165static void radeon_ttm_debugfs_fini(struct radeon_device *rdev)
1166{
1167#if defined(CONFIG_DEBUG_FS)
1168
1169 debugfs_remove(rdev->mman.vram);
1170 rdev->mman.vram = NULL;
1171
1172 debugfs_remove(rdev->mman.gtt);
1173 rdev->mman.gtt = NULL;
1174#endif
1175}