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Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/dtor/input
[cris-mirror.git] / drivers / gpu / drm / amd / amdgpu / amdgpu_ttm.c
blobe4bb435e614b86cacd4f264526423d73e3d32ace
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/amdgpu_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 <linux/iommu.h>
46 #include "amdgpu.h"
47 #include "amdgpu_object.h"
48 #include "amdgpu_trace.h"
49 #include "bif/bif_4_1_d.h"
50
51 #define DRM_FILE_PAGE_OFFSET (0x100000000ULL >> PAGE_SHIFT)
52
53 static int amdgpu_map_buffer(struct ttm_buffer_object *bo,
54 struct ttm_mem_reg *mem, unsigned num_pages,
55 uint64_t offset, unsigned window,
56 struct amdgpu_ring *ring,
57 uint64_t *addr);
58
59 static int amdgpu_ttm_debugfs_init(struct amdgpu_device *adev);
60 static void amdgpu_ttm_debugfs_fini(struct amdgpu_device *adev);
61
62 /*
63 * Global memory.
64 */
65 static int amdgpu_ttm_mem_global_init(struct drm_global_reference *ref)
66 {
67 return ttm_mem_global_init(ref->object);
68 }
69
70 static void amdgpu_ttm_mem_global_release(struct drm_global_reference *ref)
71 {
72 ttm_mem_global_release(ref->object);
73 }
74
75 static int amdgpu_ttm_global_init(struct amdgpu_device *adev)
76 {
77 struct drm_global_reference *global_ref;
78 struct amdgpu_ring *ring;
79 struct drm_sched_rq *rq;
80 int r;
81
82 adev->mman.mem_global_referenced = false;
83 global_ref = &adev->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 = &amdgpu_ttm_mem_global_init;
87 global_ref->release = &amdgpu_ttm_mem_global_release;
88 r = drm_global_item_ref(global_ref);
89 if (r) {
90 DRM_ERROR("Failed setting up TTM memory accounting "
91 "subsystem.\n");
92 goto error_mem;
93 }
94
95 adev->mman.bo_global_ref.mem_glob =
96 adev->mman.mem_global_ref.object;
97 global_ref = &adev->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) {
104 DRM_ERROR("Failed setting up TTM BO subsystem.\n");
105 goto error_bo;
106 }
107
108 mutex_init(&adev->mman.gtt_window_lock);
109
110 ring = adev->mman.buffer_funcs_ring;
111 rq = &ring->sched.sched_rq[DRM_SCHED_PRIORITY_KERNEL];
112 r = drm_sched_entity_init(&ring->sched, &adev->mman.entity,
113 rq, amdgpu_sched_jobs, NULL);
114 if (r) {
115 DRM_ERROR("Failed setting up TTM BO move run queue.\n");
116 goto error_entity;
117 }
118
119 adev->mman.mem_global_referenced = true;
120
121 return 0;
122
123 error_entity:
124 drm_global_item_unref(&adev->mman.bo_global_ref.ref);
125 error_bo:
126 drm_global_item_unref(&adev->mman.mem_global_ref);
127 error_mem:
128 return r;
129 }
130
131 static void amdgpu_ttm_global_fini(struct amdgpu_device *adev)
132 {
133 if (adev->mman.mem_global_referenced) {
134 drm_sched_entity_fini(adev->mman.entity.sched,
135 &adev->mman.entity);
136 mutex_destroy(&adev->mman.gtt_window_lock);
137 drm_global_item_unref(&adev->mman.bo_global_ref.ref);
138 drm_global_item_unref(&adev->mman.mem_global_ref);
139 adev->mman.mem_global_referenced = false;
140 }
141 }
142
143 static int amdgpu_invalidate_caches(struct ttm_bo_device *bdev, uint32_t flags)
144 {
145 return 0;
146 }
147
148 static int amdgpu_init_mem_type(struct ttm_bo_device *bdev, uint32_t type,
149 struct ttm_mem_type_manager *man)
150 {
151 struct amdgpu_device *adev;
152
153 adev = amdgpu_ttm_adev(bdev);
154
155 switch (type) {
156 case TTM_PL_SYSTEM:
157 /* System memory */
158 man->flags = TTM_MEMTYPE_FLAG_MAPPABLE;
159 man->available_caching = TTM_PL_MASK_CACHING;
160 man->default_caching = TTM_PL_FLAG_CACHED;
161 break;
162 case TTM_PL_TT:
163 man->func = &amdgpu_gtt_mgr_func;
164 man->gpu_offset = adev->mc.gart_start;
165 man->available_caching = TTM_PL_MASK_CACHING;
166 man->default_caching = TTM_PL_FLAG_CACHED;
167 man->flags = TTM_MEMTYPE_FLAG_MAPPABLE | TTM_MEMTYPE_FLAG_CMA;
168 break;
169 case TTM_PL_VRAM:
170 /* "On-card" video ram */
171 man->func = &amdgpu_vram_mgr_func;
172 man->gpu_offset = adev->mc.vram_start;
173 man->flags = TTM_MEMTYPE_FLAG_FIXED |
174 TTM_MEMTYPE_FLAG_MAPPABLE;
175 man->available_caching = TTM_PL_FLAG_UNCACHED | TTM_PL_FLAG_WC;
176 man->default_caching = TTM_PL_FLAG_WC;
177 break;
178 case AMDGPU_PL_GDS:
179 case AMDGPU_PL_GWS:
180 case AMDGPU_PL_OA:
181 /* On-chip GDS memory*/
182 man->func = &ttm_bo_manager_func;
183 man->gpu_offset = 0;
184 man->flags = TTM_MEMTYPE_FLAG_FIXED | TTM_MEMTYPE_FLAG_CMA;
185 man->available_caching = TTM_PL_FLAG_UNCACHED;
186 man->default_caching = TTM_PL_FLAG_UNCACHED;
187 break;
188 default:
189 DRM_ERROR("Unsupported memory type %u\n", (unsigned)type);
190 return -EINVAL;
191 }
192 return 0;
193 }
194
195 static void amdgpu_evict_flags(struct ttm_buffer_object *bo,
196 struct ttm_placement *placement)
197 {
198 struct amdgpu_device *adev = amdgpu_ttm_adev(bo->bdev);
199 struct amdgpu_bo *abo;
200 static const struct ttm_place placements = {
201 .fpfn = 0,
202 .lpfn = 0,
203 .flags = TTM_PL_MASK_CACHING | TTM_PL_FLAG_SYSTEM
204 };
205
206 if (!amdgpu_ttm_bo_is_amdgpu_bo(bo)) {
207 placement->placement = &placements;
208 placement->busy_placement = &placements;
209 placement->num_placement = 1;
210 placement->num_busy_placement = 1;
211 return;
212 }
213 abo = ttm_to_amdgpu_bo(bo);
214 switch (bo->mem.mem_type) {
215 case TTM_PL_VRAM:
216 if (adev->mman.buffer_funcs &&
217 adev->mman.buffer_funcs_ring &&
218 adev->mman.buffer_funcs_ring->ready == false) {
219 amdgpu_ttm_placement_from_domain(abo, AMDGPU_GEM_DOMAIN_CPU);
220 } else if (adev->mc.visible_vram_size < adev->mc.real_vram_size &&
221 !(abo->flags & AMDGPU_GEM_CREATE_CPU_ACCESS_REQUIRED)) {
222 unsigned fpfn = adev->mc.visible_vram_size >> PAGE_SHIFT;
223 struct drm_mm_node *node = bo->mem.mm_node;
224 unsigned long pages_left;
225
226 for (pages_left = bo->mem.num_pages;
227 pages_left;
228 pages_left -= node->size, node++) {
229 if (node->start < fpfn)
230 break;
231 }
232
233 if (!pages_left)
234 goto gtt;
235
236 /* Try evicting to the CPU inaccessible part of VRAM
237 * first, but only set GTT as busy placement, so this
238 * BO will be evicted to GTT rather than causing other
239 * BOs to be evicted from VRAM
240 */
241 amdgpu_ttm_placement_from_domain(abo, AMDGPU_GEM_DOMAIN_VRAM |
242 AMDGPU_GEM_DOMAIN_GTT);
243 abo->placements[0].fpfn = fpfn;
244 abo->placements[0].lpfn = 0;
245 abo->placement.busy_placement = &abo->placements[1];
246 abo->placement.num_busy_placement = 1;
247 } else {
248 gtt:
249 amdgpu_ttm_placement_from_domain(abo, AMDGPU_GEM_DOMAIN_GTT);
250 }
251 break;
252 case TTM_PL_TT:
253 default:
254 amdgpu_ttm_placement_from_domain(abo, AMDGPU_GEM_DOMAIN_CPU);
255 }
256 *placement = abo->placement;
257 }
258
259 static int amdgpu_verify_access(struct ttm_buffer_object *bo, struct file *filp)
260 {
261 struct amdgpu_bo *abo = ttm_to_amdgpu_bo(bo);
262
263 if (amdgpu_ttm_tt_get_usermm(bo->ttm))
264 return -EPERM;
265 return drm_vma_node_verify_access(&abo->gem_base.vma_node,
266 filp->private_data);
267 }
268
269 static void amdgpu_move_null(struct ttm_buffer_object *bo,
270 struct ttm_mem_reg *new_mem)
271 {
272 struct ttm_mem_reg *old_mem = &bo->mem;
273
274 BUG_ON(old_mem->mm_node != NULL);
275 *old_mem = *new_mem;
276 new_mem->mm_node = NULL;
277 }
278
279 static uint64_t amdgpu_mm_node_addr(struct ttm_buffer_object *bo,
280 struct drm_mm_node *mm_node,
281 struct ttm_mem_reg *mem)
282 {
283 uint64_t addr = 0;
284
285 if (mem->mem_type != TTM_PL_TT || amdgpu_gtt_mgr_has_gart_addr(mem)) {
286 addr = mm_node->start << PAGE_SHIFT;
287 addr += bo->bdev->man[mem->mem_type].gpu_offset;
288 }
289 return addr;
290 }
291
292 /**
293 * amdgpu_find_mm_node - Helper function finds the drm_mm_node
294 * corresponding to @offset. It also modifies the offset to be
295 * within the drm_mm_node returned
296 */
297 static struct drm_mm_node *amdgpu_find_mm_node(struct ttm_mem_reg *mem,
298 unsigned long *offset)
299 {
300 struct drm_mm_node *mm_node = mem->mm_node;
301
302 while (*offset >= (mm_node->size << PAGE_SHIFT)) {
303 *offset -= (mm_node->size << PAGE_SHIFT);
304 ++mm_node;
305 }
306 return mm_node;
307 }
308
309 /**
310 * amdgpu_copy_ttm_mem_to_mem - Helper function for copy
311 *
312 * The function copies @size bytes from {src->mem + src->offset} to
313 * {dst->mem + dst->offset}. src->bo and dst->bo could be same BO for a
314 * move and different for a BO to BO copy.
315 *
316 * @f: Returns the last fence if multiple jobs are submitted.
317 */
318 int amdgpu_ttm_copy_mem_to_mem(struct amdgpu_device *adev,
319 struct amdgpu_copy_mem *src,
320 struct amdgpu_copy_mem *dst,
321 uint64_t size,
322 struct reservation_object *resv,
323 struct dma_fence **f)
324 {
325 struct amdgpu_ring *ring = adev->mman.buffer_funcs_ring;
326 struct drm_mm_node *src_mm, *dst_mm;
327 uint64_t src_node_start, dst_node_start, src_node_size,
328 dst_node_size, src_page_offset, dst_page_offset;
329 struct dma_fence *fence = NULL;
330 int r = 0;
331 const uint64_t GTT_MAX_BYTES = (AMDGPU_GTT_MAX_TRANSFER_SIZE *
332 AMDGPU_GPU_PAGE_SIZE);
333
334 if (!ring->ready) {
335 DRM_ERROR("Trying to move memory with ring turned off.\n");
336 return -EINVAL;
337 }
338
339 src_mm = amdgpu_find_mm_node(src->mem, &src->offset);
340 src_node_start = amdgpu_mm_node_addr(src->bo, src_mm, src->mem) +
341 src->offset;
342 src_node_size = (src_mm->size << PAGE_SHIFT) - src->offset;
343 src_page_offset = src_node_start & (PAGE_SIZE - 1);
344
345 dst_mm = amdgpu_find_mm_node(dst->mem, &dst->offset);
346 dst_node_start = amdgpu_mm_node_addr(dst->bo, dst_mm, dst->mem) +
347 dst->offset;
348 dst_node_size = (dst_mm->size << PAGE_SHIFT) - dst->offset;
349 dst_page_offset = dst_node_start & (PAGE_SIZE - 1);
350
351 mutex_lock(&adev->mman.gtt_window_lock);
352
353 while (size) {
354 unsigned long cur_size;
355 uint64_t from = src_node_start, to = dst_node_start;
356 struct dma_fence *next;
357
358 /* Copy size cannot exceed GTT_MAX_BYTES. So if src or dst
359 * begins at an offset, then adjust the size accordingly
360 */
361 cur_size = min3(min(src_node_size, dst_node_size), size,
362 GTT_MAX_BYTES);
363 if (cur_size + src_page_offset > GTT_MAX_BYTES ||
364 cur_size + dst_page_offset > GTT_MAX_BYTES)
365 cur_size -= max(src_page_offset, dst_page_offset);
366
367 /* Map only what needs to be accessed. Map src to window 0 and
368 * dst to window 1
369 */
370 if (src->mem->mem_type == TTM_PL_TT &&
371 !amdgpu_gtt_mgr_has_gart_addr(src->mem)) {
372 r = amdgpu_map_buffer(src->bo, src->mem,
373 PFN_UP(cur_size + src_page_offset),
374 src_node_start, 0, ring,
375 &from);
376 if (r)
377 goto error;
378 /* Adjust the offset because amdgpu_map_buffer returns
379 * start of mapped page
380 */
381 from += src_page_offset;
382 }
383
384 if (dst->mem->mem_type == TTM_PL_TT &&
385 !amdgpu_gtt_mgr_has_gart_addr(dst->mem)) {
386 r = amdgpu_map_buffer(dst->bo, dst->mem,
387 PFN_UP(cur_size + dst_page_offset),
388 dst_node_start, 1, ring,
389 &to);
390 if (r)
391 goto error;
392 to += dst_page_offset;
393 }
394
395 r = amdgpu_copy_buffer(ring, from, to, cur_size,
396 resv, &next, false, true);
397 if (r)
398 goto error;
399
400 dma_fence_put(fence);
401 fence = next;
402
403 size -= cur_size;
404 if (!size)
405 break;
406
407 src_node_size -= cur_size;
408 if (!src_node_size) {
409 src_node_start = amdgpu_mm_node_addr(src->bo, ++src_mm,
410 src->mem);
411 src_node_size = (src_mm->size << PAGE_SHIFT);
412 } else {
413 src_node_start += cur_size;
414 src_page_offset = src_node_start & (PAGE_SIZE - 1);
415 }
416 dst_node_size -= cur_size;
417 if (!dst_node_size) {
418 dst_node_start = amdgpu_mm_node_addr(dst->bo, ++dst_mm,
419 dst->mem);
420 dst_node_size = (dst_mm->size << PAGE_SHIFT);
421 } else {
422 dst_node_start += cur_size;
423 dst_page_offset = dst_node_start & (PAGE_SIZE - 1);
424 }
425 }
426 error:
427 mutex_unlock(&adev->mman.gtt_window_lock);
428 if (f)
429 *f = dma_fence_get(fence);
430 dma_fence_put(fence);
431 return r;
432 }
433
434
435 static int amdgpu_move_blit(struct ttm_buffer_object *bo,
436 bool evict, bool no_wait_gpu,
437 struct ttm_mem_reg *new_mem,
438 struct ttm_mem_reg *old_mem)
439 {
440 struct amdgpu_device *adev = amdgpu_ttm_adev(bo->bdev);
441 struct amdgpu_copy_mem src, dst;
442 struct dma_fence *fence = NULL;
443 int r;
444
445 src.bo = bo;
446 dst.bo = bo;
447 src.mem = old_mem;
448 dst.mem = new_mem;
449 src.offset = 0;
450 dst.offset = 0;
451
452 r = amdgpu_ttm_copy_mem_to_mem(adev, &src, &dst,
453 new_mem->num_pages << PAGE_SHIFT,
454 bo->resv, &fence);
455 if (r)
456 goto error;
457
458 r = ttm_bo_pipeline_move(bo, fence, evict, new_mem);
459 dma_fence_put(fence);
460 return r;
461
462 error:
463 if (fence)
464 dma_fence_wait(fence, false);
465 dma_fence_put(fence);
466 return r;
467 }
468
469 static int amdgpu_move_vram_ram(struct ttm_buffer_object *bo, bool evict,
470 struct ttm_operation_ctx *ctx,
471 struct ttm_mem_reg *new_mem)
472 {
473 struct amdgpu_device *adev;
474 struct ttm_mem_reg *old_mem = &bo->mem;
475 struct ttm_mem_reg tmp_mem;
476 struct ttm_place placements;
477 struct ttm_placement placement;
478 int r;
479
480 adev = amdgpu_ttm_adev(bo->bdev);
481 tmp_mem = *new_mem;
482 tmp_mem.mm_node = NULL;
483 placement.num_placement = 1;
484 placement.placement = &placements;
485 placement.num_busy_placement = 1;
486 placement.busy_placement = &placements;
487 placements.fpfn = 0;
488 placements.lpfn = 0;
489 placements.flags = TTM_PL_MASK_CACHING | TTM_PL_FLAG_TT;
490 r = ttm_bo_mem_space(bo, &placement, &tmp_mem, ctx);
491 if (unlikely(r)) {
492 return r;
493 }
494
495 r = ttm_tt_set_placement_caching(bo->ttm, tmp_mem.placement);
496 if (unlikely(r)) {
497 goto out_cleanup;
498 }
499
500 r = ttm_tt_bind(bo->ttm, &tmp_mem, ctx);
501 if (unlikely(r)) {
502 goto out_cleanup;
503 }
504 r = amdgpu_move_blit(bo, true, ctx->no_wait_gpu, &tmp_mem, old_mem);
505 if (unlikely(r)) {
506 goto out_cleanup;
507 }
508 r = ttm_bo_move_ttm(bo, ctx, new_mem);
509 out_cleanup:
510 ttm_bo_mem_put(bo, &tmp_mem);
511 return r;
512 }
513
514 static int amdgpu_move_ram_vram(struct ttm_buffer_object *bo, bool evict,
515 struct ttm_operation_ctx *ctx,
516 struct ttm_mem_reg *new_mem)
517 {
518 struct amdgpu_device *adev;
519 struct ttm_mem_reg *old_mem = &bo->mem;
520 struct ttm_mem_reg tmp_mem;
521 struct ttm_placement placement;
522 struct ttm_place placements;
523 int r;
524
525 adev = amdgpu_ttm_adev(bo->bdev);
526 tmp_mem = *new_mem;
527 tmp_mem.mm_node = NULL;
528 placement.num_placement = 1;
529 placement.placement = &placements;
530 placement.num_busy_placement = 1;
531 placement.busy_placement = &placements;
532 placements.fpfn = 0;
533 placements.lpfn = 0;
534 placements.flags = TTM_PL_MASK_CACHING | TTM_PL_FLAG_TT;
535 r = ttm_bo_mem_space(bo, &placement, &tmp_mem, ctx);
536 if (unlikely(r)) {
537 return r;
538 }
539 r = ttm_bo_move_ttm(bo, ctx, &tmp_mem);
540 if (unlikely(r)) {
541 goto out_cleanup;
542 }
543 r = amdgpu_move_blit(bo, true, ctx->no_wait_gpu, new_mem, old_mem);
544 if (unlikely(r)) {
545 goto out_cleanup;
546 }
547 out_cleanup:
548 ttm_bo_mem_put(bo, &tmp_mem);
549 return r;
550 }
551
552 static int amdgpu_bo_move(struct ttm_buffer_object *bo, bool evict,
553 struct ttm_operation_ctx *ctx,
554 struct ttm_mem_reg *new_mem)
555 {
556 struct amdgpu_device *adev;
557 struct amdgpu_bo *abo;
558 struct ttm_mem_reg *old_mem = &bo->mem;
559 int r;
560
561 /* Can't move a pinned BO */
562 abo = ttm_to_amdgpu_bo(bo);
563 if (WARN_ON_ONCE(abo->pin_count > 0))
564 return -EINVAL;
565
566 adev = amdgpu_ttm_adev(bo->bdev);
567
568 if (old_mem->mem_type == TTM_PL_SYSTEM && bo->ttm == NULL) {
569 amdgpu_move_null(bo, new_mem);
570 return 0;
571 }
572 if ((old_mem->mem_type == TTM_PL_TT &&
573 new_mem->mem_type == TTM_PL_SYSTEM) ||
574 (old_mem->mem_type == TTM_PL_SYSTEM &&
575 new_mem->mem_type == TTM_PL_TT)) {
576 /* bind is enough */
577 amdgpu_move_null(bo, new_mem);
578 return 0;
579 }
580 if (adev->mman.buffer_funcs == NULL ||
581 adev->mman.buffer_funcs_ring == NULL ||
582 !adev->mman.buffer_funcs_ring->ready) {
583 /* use memcpy */
584 goto memcpy;
585 }
586
587 if (old_mem->mem_type == TTM_PL_VRAM &&
588 new_mem->mem_type == TTM_PL_SYSTEM) {
589 r = amdgpu_move_vram_ram(bo, evict, ctx, new_mem);
590 } else if (old_mem->mem_type == TTM_PL_SYSTEM &&
591 new_mem->mem_type == TTM_PL_VRAM) {
592 r = amdgpu_move_ram_vram(bo, evict, ctx, new_mem);
593 } else {
594 r = amdgpu_move_blit(bo, evict, ctx->no_wait_gpu,
595 new_mem, old_mem);
596 }
597
598 if (r) {
599 memcpy:
600 r = ttm_bo_move_memcpy(bo, ctx, new_mem);
601 if (r) {
602 return r;
603 }
604 }
605
606 if (bo->type == ttm_bo_type_device &&
607 new_mem->mem_type == TTM_PL_VRAM &&
608 old_mem->mem_type != TTM_PL_VRAM) {
609 /* amdgpu_bo_fault_reserve_notify will re-set this if the CPU
610 * accesses the BO after it's moved.
611 */
612 abo->flags &= ~AMDGPU_GEM_CREATE_CPU_ACCESS_REQUIRED;
613 }
614
615 /* update statistics */
616 atomic64_add((u64)bo->num_pages << PAGE_SHIFT, &adev->num_bytes_moved);
617 return 0;
618 }
619
620 static int amdgpu_ttm_io_mem_reserve(struct ttm_bo_device *bdev, struct ttm_mem_reg *mem)
621 {
622 struct ttm_mem_type_manager *man = &bdev->man[mem->mem_type];
623 struct amdgpu_device *adev = amdgpu_ttm_adev(bdev);
624
625 mem->bus.addr = NULL;
626 mem->bus.offset = 0;
627 mem->bus.size = mem->num_pages << PAGE_SHIFT;
628 mem->bus.base = 0;
629 mem->bus.is_iomem = false;
630 if (!(man->flags & TTM_MEMTYPE_FLAG_MAPPABLE))
631 return -EINVAL;
632 switch (mem->mem_type) {
633 case TTM_PL_SYSTEM:
634 /* system memory */
635 return 0;
636 case TTM_PL_TT:
637 break;
638 case TTM_PL_VRAM:
639 mem->bus.offset = mem->start << PAGE_SHIFT;
640 /* check if it's visible */
641 if ((mem->bus.offset + mem->bus.size) > adev->mc.visible_vram_size)
642 return -EINVAL;
643 mem->bus.base = adev->mc.aper_base;
644 mem->bus.is_iomem = true;
645 break;
646 default:
647 return -EINVAL;
648 }
649 return 0;
650 }
651
652 static void amdgpu_ttm_io_mem_free(struct ttm_bo_device *bdev, struct ttm_mem_reg *mem)
653 {
654 }
655
656 static unsigned long amdgpu_ttm_io_mem_pfn(struct ttm_buffer_object *bo,
657 unsigned long page_offset)
658 {
659 struct drm_mm_node *mm;
660 unsigned long offset = (page_offset << PAGE_SHIFT);
661
662 mm = amdgpu_find_mm_node(&bo->mem, &offset);
663 return (bo->mem.bus.base >> PAGE_SHIFT) + mm->start +
664 (offset >> PAGE_SHIFT);
665 }
666
667 /*
668 * TTM backend functions.
669 */
670 struct amdgpu_ttm_gup_task_list {
671 struct list_head list;
672 struct task_struct *task;
673 };
674
675 struct amdgpu_ttm_tt {
676 struct ttm_dma_tt ttm;
677 struct amdgpu_device *adev;
678 u64 offset;
679 uint64_t userptr;
680 struct mm_struct *usermm;
681 uint32_t userflags;
682 spinlock_t guptasklock;
683 struct list_head guptasks;
684 atomic_t mmu_invalidations;
685 uint32_t last_set_pages;
686 };
687
688 int amdgpu_ttm_tt_get_user_pages(struct ttm_tt *ttm, struct page **pages)
689 {
690 struct amdgpu_ttm_tt *gtt = (void *)ttm;
691 unsigned int flags = 0;
692 unsigned pinned = 0;
693 int r;
694
695 if (!(gtt->userflags & AMDGPU_GEM_USERPTR_READONLY))
696 flags |= FOLL_WRITE;
697
698 down_read(&current->mm->mmap_sem);
699
700 if (gtt->userflags & AMDGPU_GEM_USERPTR_ANONONLY) {
701 /* check that we only use anonymous memory
702 to prevent problems with writeback */
703 unsigned long end = gtt->userptr + ttm->num_pages * PAGE_SIZE;
704 struct vm_area_struct *vma;
705
706 vma = find_vma(gtt->usermm, gtt->userptr);
707 if (!vma || vma->vm_file || vma->vm_end < end) {
708 up_read(&current->mm->mmap_sem);
709 return -EPERM;
710 }
711 }
712
713 do {
714 unsigned num_pages = ttm->num_pages - pinned;
715 uint64_t userptr = gtt->userptr + pinned * PAGE_SIZE;
716 struct page **p = pages + pinned;
717 struct amdgpu_ttm_gup_task_list guptask;
718
719 guptask.task = current;
720 spin_lock(&gtt->guptasklock);
721 list_add(&guptask.list, &gtt->guptasks);
722 spin_unlock(&gtt->guptasklock);
723
724 r = get_user_pages(userptr, num_pages, flags, p, NULL);
725
726 spin_lock(&gtt->guptasklock);
727 list_del(&guptask.list);
728 spin_unlock(&gtt->guptasklock);
729
730 if (r < 0)
731 goto release_pages;
732
733 pinned += r;
734
735 } while (pinned < ttm->num_pages);
736
737 up_read(&current->mm->mmap_sem);
738 return 0;
739
740 release_pages:
741 release_pages(pages, pinned);
742 up_read(&current->mm->mmap_sem);
743 return r;
744 }
745
746 void amdgpu_ttm_tt_set_user_pages(struct ttm_tt *ttm, struct page **pages)
747 {
748 struct amdgpu_ttm_tt *gtt = (void *)ttm;
749 unsigned i;
750
751 gtt->last_set_pages = atomic_read(&gtt->mmu_invalidations);
752 for (i = 0; i < ttm->num_pages; ++i) {
753 if (ttm->pages[i])
754 put_page(ttm->pages[i]);
755
756 ttm->pages[i] = pages ? pages[i] : NULL;
757 }
758 }
759
760 void amdgpu_ttm_tt_mark_user_pages(struct ttm_tt *ttm)
761 {
762 struct amdgpu_ttm_tt *gtt = (void *)ttm;
763 unsigned i;
764
765 for (i = 0; i < ttm->num_pages; ++i) {
766 struct page *page = ttm->pages[i];
767
768 if (!page)
769 continue;
770
771 if (!(gtt->userflags & AMDGPU_GEM_USERPTR_READONLY))
772 set_page_dirty(page);
773
774 mark_page_accessed(page);
775 }
776 }
777
778 /* prepare the sg table with the user pages */
779 static int amdgpu_ttm_tt_pin_userptr(struct ttm_tt *ttm)
780 {
781 struct amdgpu_device *adev = amdgpu_ttm_adev(ttm->bdev);
782 struct amdgpu_ttm_tt *gtt = (void *)ttm;
783 unsigned nents;
784 int r;
785
786 int write = !(gtt->userflags & AMDGPU_GEM_USERPTR_READONLY);
787 enum dma_data_direction direction = write ?
788 DMA_BIDIRECTIONAL : DMA_TO_DEVICE;
789
790 r = sg_alloc_table_from_pages(ttm->sg, ttm->pages, ttm->num_pages, 0,
791 ttm->num_pages << PAGE_SHIFT,
792 GFP_KERNEL);
793 if (r)
794 goto release_sg;
795
796 r = -ENOMEM;
797 nents = dma_map_sg(adev->dev, ttm->sg->sgl, ttm->sg->nents, direction);
798 if (nents != ttm->sg->nents)
799 goto release_sg;
800
801 drm_prime_sg_to_page_addr_arrays(ttm->sg, ttm->pages,
802 gtt->ttm.dma_address, ttm->num_pages);
803
804 return 0;
805
806 release_sg:
807 kfree(ttm->sg);
808 return r;
809 }
810
811 static void amdgpu_ttm_tt_unpin_userptr(struct ttm_tt *ttm)
812 {
813 struct amdgpu_device *adev = amdgpu_ttm_adev(ttm->bdev);
814 struct amdgpu_ttm_tt *gtt = (void *)ttm;
815
816 int write = !(gtt->userflags & AMDGPU_GEM_USERPTR_READONLY);
817 enum dma_data_direction direction = write ?
818 DMA_BIDIRECTIONAL : DMA_TO_DEVICE;
819
820 /* double check that we don't free the table twice */
821 if (!ttm->sg->sgl)
822 return;
823
824 /* free the sg table and pages again */
825 dma_unmap_sg(adev->dev, ttm->sg->sgl, ttm->sg->nents, direction);
826
827 amdgpu_ttm_tt_mark_user_pages(ttm);
828
829 sg_free_table(ttm->sg);
830 }
831
832 static int amdgpu_ttm_backend_bind(struct ttm_tt *ttm,
833 struct ttm_mem_reg *bo_mem)
834 {
835 struct amdgpu_ttm_tt *gtt = (void*)ttm;
836 uint64_t flags;
837 int r = 0;
838
839 if (gtt->userptr) {
840 r = amdgpu_ttm_tt_pin_userptr(ttm);
841 if (r) {
842 DRM_ERROR("failed to pin userptr\n");
843 return r;
844 }
845 }
846 if (!ttm->num_pages) {
847 WARN(1, "nothing to bind %lu pages for mreg %p back %p!\n",
848 ttm->num_pages, bo_mem, ttm);
849 }
850
851 if (bo_mem->mem_type == AMDGPU_PL_GDS ||
852 bo_mem->mem_type == AMDGPU_PL_GWS ||
853 bo_mem->mem_type == AMDGPU_PL_OA)
854 return -EINVAL;
855
856 if (!amdgpu_gtt_mgr_has_gart_addr(bo_mem)) {
857 gtt->offset = AMDGPU_BO_INVALID_OFFSET;
858 return 0;
859 }
860
861 flags = amdgpu_ttm_tt_pte_flags(gtt->adev, ttm, bo_mem);
862 gtt->offset = (u64)bo_mem->start << PAGE_SHIFT;
863 r = amdgpu_gart_bind(gtt->adev, gtt->offset, ttm->num_pages,
864 ttm->pages, gtt->ttm.dma_address, flags);
865
866 if (r)
867 DRM_ERROR("failed to bind %lu pages at 0x%08llX\n",
868 ttm->num_pages, gtt->offset);
869 return r;
870 }
871
872 int amdgpu_ttm_alloc_gart(struct ttm_buffer_object *bo)
873 {
874 struct amdgpu_device *adev = amdgpu_ttm_adev(bo->bdev);
875 struct ttm_operation_ctx ctx = { false, false };
876 struct amdgpu_ttm_tt *gtt = (void*)bo->ttm;
877 struct ttm_mem_reg tmp;
878 struct ttm_placement placement;
879 struct ttm_place placements;
880 uint64_t flags;
881 int r;
882
883 if (bo->mem.mem_type != TTM_PL_TT ||
884 amdgpu_gtt_mgr_has_gart_addr(&bo->mem))
885 return 0;
886
887 tmp = bo->mem;
888 tmp.mm_node = NULL;
889 placement.num_placement = 1;
890 placement.placement = &placements;
891 placement.num_busy_placement = 1;
892 placement.busy_placement = &placements;
893 placements.fpfn = 0;
894 placements.lpfn = adev->mc.gart_size >> PAGE_SHIFT;
895 placements.flags = (bo->mem.placement & ~TTM_PL_MASK_MEM) |
896 TTM_PL_FLAG_TT;
897
898 r = ttm_bo_mem_space(bo, &placement, &tmp, &ctx);
899 if (unlikely(r))
900 return r;
901
902 flags = amdgpu_ttm_tt_pte_flags(adev, bo->ttm, &tmp);
903 gtt->offset = (u64)tmp.start << PAGE_SHIFT;
904 r = amdgpu_gart_bind(adev, gtt->offset, bo->ttm->num_pages,
905 bo->ttm->pages, gtt->ttm.dma_address, flags);
906 if (unlikely(r)) {
907 ttm_bo_mem_put(bo, &tmp);
908 return r;
909 }
910
911 ttm_bo_mem_put(bo, &bo->mem);
912 bo->mem = tmp;
913 bo->offset = (bo->mem.start << PAGE_SHIFT) +
914 bo->bdev->man[bo->mem.mem_type].gpu_offset;
915
916 return 0;
917 }
918
919 int amdgpu_ttm_recover_gart(struct ttm_buffer_object *tbo)
920 {
921 struct amdgpu_device *adev = amdgpu_ttm_adev(tbo->bdev);
922 struct amdgpu_ttm_tt *gtt = (void *)tbo->ttm;
923 uint64_t flags;
924 int r;
925
926 if (!gtt)
927 return 0;
928
929 flags = amdgpu_ttm_tt_pte_flags(adev, &gtt->ttm.ttm, &tbo->mem);
930 r = amdgpu_gart_bind(adev, gtt->offset, gtt->ttm.ttm.num_pages,
931 gtt->ttm.ttm.pages, gtt->ttm.dma_address, flags);
932 if (r)
933 DRM_ERROR("failed to bind %lu pages at 0x%08llX\n",
934 gtt->ttm.ttm.num_pages, gtt->offset);
935 return r;
936 }
937
938 static int amdgpu_ttm_backend_unbind(struct ttm_tt *ttm)
939 {
940 struct amdgpu_ttm_tt *gtt = (void *)ttm;
941 int r;
942
943 if (gtt->userptr)
944 amdgpu_ttm_tt_unpin_userptr(ttm);
945
946 if (gtt->offset == AMDGPU_BO_INVALID_OFFSET)
947 return 0;
948
949 /* unbind shouldn't be done for GDS/GWS/OA in ttm_bo_clean_mm */
950 r = amdgpu_gart_unbind(gtt->adev, gtt->offset, ttm->num_pages);
951 if (r)
952 DRM_ERROR("failed to unbind %lu pages at 0x%08llX\n",
953 gtt->ttm.ttm.num_pages, gtt->offset);
954 return r;
955 }
956
957 static void amdgpu_ttm_backend_destroy(struct ttm_tt *ttm)
958 {
959 struct amdgpu_ttm_tt *gtt = (void *)ttm;
960
961 ttm_dma_tt_fini(&gtt->ttm);
962 kfree(gtt);
963 }
964
965 static struct ttm_backend_func amdgpu_backend_func = {
966 .bind = &amdgpu_ttm_backend_bind,
967 .unbind = &amdgpu_ttm_backend_unbind,
968 .destroy = &amdgpu_ttm_backend_destroy,
969 };
970
971 static struct ttm_tt *amdgpu_ttm_tt_create(struct ttm_bo_device *bdev,
972 unsigned long size, uint32_t page_flags,
973 struct page *dummy_read_page)
974 {
975 struct amdgpu_device *adev;
976 struct amdgpu_ttm_tt *gtt;
977
978 adev = amdgpu_ttm_adev(bdev);
979
980 gtt = kzalloc(sizeof(struct amdgpu_ttm_tt), GFP_KERNEL);
981 if (gtt == NULL) {
982 return NULL;
983 }
984 gtt->ttm.ttm.func = &amdgpu_backend_func;
985 gtt->adev = adev;
986 if (ttm_dma_tt_init(&gtt->ttm, bdev, size, page_flags, dummy_read_page)) {
987 kfree(gtt);
988 return NULL;
989 }
990 return &gtt->ttm.ttm;
991 }
992
993 static int amdgpu_ttm_tt_populate(struct ttm_tt *ttm,
994 struct ttm_operation_ctx *ctx)
995 {
996 struct amdgpu_device *adev = amdgpu_ttm_adev(ttm->bdev);
997 struct amdgpu_ttm_tt *gtt = (void *)ttm;
998 bool slave = !!(ttm->page_flags & TTM_PAGE_FLAG_SG);
999
1000 if (ttm->state != tt_unpopulated)
1001 return 0;
1002
1003 if (gtt && gtt->userptr) {
1004 ttm->sg = kzalloc(sizeof(struct sg_table), GFP_KERNEL);
1005 if (!ttm->sg)
1006 return -ENOMEM;
1007
1008 ttm->page_flags |= TTM_PAGE_FLAG_SG;
1009 ttm->state = tt_unbound;
1010 return 0;
1011 }
1012
1013 if (slave && ttm->sg) {
1014 drm_prime_sg_to_page_addr_arrays(ttm->sg, ttm->pages,
1015 gtt->ttm.dma_address, ttm->num_pages);
1016 ttm->state = tt_unbound;
1017 return 0;
1018 }
1019
1020 #ifdef CONFIG_SWIOTLB
1021 if (swiotlb_nr_tbl()) {
1022 return ttm_dma_populate(&gtt->ttm, adev->dev, ctx);
1023 }
1024 #endif
1025
1026 return ttm_populate_and_map_pages(adev->dev, &gtt->ttm, ctx);
1027 }
1028
1029 static void amdgpu_ttm_tt_unpopulate(struct ttm_tt *ttm)
1030 {
1031 struct amdgpu_device *adev;
1032 struct amdgpu_ttm_tt *gtt = (void *)ttm;
1033 bool slave = !!(ttm->page_flags & TTM_PAGE_FLAG_SG);
1034
1035 if (gtt && gtt->userptr) {
1036 amdgpu_ttm_tt_set_user_pages(ttm, NULL);
1037 kfree(ttm->sg);
1038 ttm->page_flags &= ~TTM_PAGE_FLAG_SG;
1039 return;
1040 }
1041
1042 if (slave)
1043 return;
1044
1045 adev = amdgpu_ttm_adev(ttm->bdev);
1046
1047 #ifdef CONFIG_SWIOTLB
1048 if (swiotlb_nr_tbl()) {
1049 ttm_dma_unpopulate(&gtt->ttm, adev->dev);
1050 return;
1051 }
1052 #endif
1053
1054 ttm_unmap_and_unpopulate_pages(adev->dev, &gtt->ttm);
1055 }
1056
1057 int amdgpu_ttm_tt_set_userptr(struct ttm_tt *ttm, uint64_t addr,
1058 uint32_t flags)
1059 {
1060 struct amdgpu_ttm_tt *gtt = (void *)ttm;
1061
1062 if (gtt == NULL)
1063 return -EINVAL;
1064
1065 gtt->userptr = addr;
1066 gtt->usermm = current->mm;
1067 gtt->userflags = flags;
1068 spin_lock_init(&gtt->guptasklock);
1069 INIT_LIST_HEAD(&gtt->guptasks);
1070 atomic_set(&gtt->mmu_invalidations, 0);
1071 gtt->last_set_pages = 0;
1072
1073 return 0;
1074 }
1075
1076 struct mm_struct *amdgpu_ttm_tt_get_usermm(struct ttm_tt *ttm)
1077 {
1078 struct amdgpu_ttm_tt *gtt = (void *)ttm;
1079
1080 if (gtt == NULL)
1081 return NULL;
1082
1083 return gtt->usermm;
1084 }
1085
1086 bool amdgpu_ttm_tt_affect_userptr(struct ttm_tt *ttm, unsigned long start,
1087 unsigned long end)
1088 {
1089 struct amdgpu_ttm_tt *gtt = (void *)ttm;
1090 struct amdgpu_ttm_gup_task_list *entry;
1091 unsigned long size;
1092
1093 if (gtt == NULL || !gtt->userptr)
1094 return false;
1095
1096 size = (unsigned long)gtt->ttm.ttm.num_pages * PAGE_SIZE;
1097 if (gtt->userptr > end || gtt->userptr + size <= start)
1098 return false;
1099
1100 spin_lock(&gtt->guptasklock);
1101 list_for_each_entry(entry, &gtt->guptasks, list) {
1102 if (entry->task == current) {
1103 spin_unlock(&gtt->guptasklock);
1104 return false;
1105 }
1106 }
1107 spin_unlock(&gtt->guptasklock);
1108
1109 atomic_inc(&gtt->mmu_invalidations);
1110
1111 return true;
1112 }
1113
1114 bool amdgpu_ttm_tt_userptr_invalidated(struct ttm_tt *ttm,
1115 int *last_invalidated)
1116 {
1117 struct amdgpu_ttm_tt *gtt = (void *)ttm;
1118 int prev_invalidated = *last_invalidated;
1119
1120 *last_invalidated = atomic_read(&gtt->mmu_invalidations);
1121 return prev_invalidated != *last_invalidated;
1122 }
1123
1124 bool amdgpu_ttm_tt_userptr_needs_pages(struct ttm_tt *ttm)
1125 {
1126 struct amdgpu_ttm_tt *gtt = (void *)ttm;
1127
1128 if (gtt == NULL || !gtt->userptr)
1129 return false;
1130
1131 return atomic_read(&gtt->mmu_invalidations) != gtt->last_set_pages;
1132 }
1133
1134 bool amdgpu_ttm_tt_is_readonly(struct ttm_tt *ttm)
1135 {
1136 struct amdgpu_ttm_tt *gtt = (void *)ttm;
1137
1138 if (gtt == NULL)
1139 return false;
1140
1141 return !!(gtt->userflags & AMDGPU_GEM_USERPTR_READONLY);
1142 }
1143
1144 uint64_t amdgpu_ttm_tt_pte_flags(struct amdgpu_device *adev, struct ttm_tt *ttm,
1145 struct ttm_mem_reg *mem)
1146 {
1147 uint64_t flags = 0;
1148
1149 if (mem && mem->mem_type != TTM_PL_SYSTEM)
1150 flags |= AMDGPU_PTE_VALID;
1151
1152 if (mem && mem->mem_type == TTM_PL_TT) {
1153 flags |= AMDGPU_PTE_SYSTEM;
1154
1155 if (ttm->caching_state == tt_cached)
1156 flags |= AMDGPU_PTE_SNOOPED;
1157 }
1158
1159 flags |= adev->gart.gart_pte_flags;
1160 flags |= AMDGPU_PTE_READABLE;
1161
1162 if (!amdgpu_ttm_tt_is_readonly(ttm))
1163 flags |= AMDGPU_PTE_WRITEABLE;
1164
1165 return flags;
1166 }
1167
1168 static bool amdgpu_ttm_bo_eviction_valuable(struct ttm_buffer_object *bo,
1169 const struct ttm_place *place)
1170 {
1171 unsigned long num_pages = bo->mem.num_pages;
1172 struct drm_mm_node *node = bo->mem.mm_node;
1173
1174 switch (bo->mem.mem_type) {
1175 case TTM_PL_TT:
1176 return true;
1177
1178 case TTM_PL_VRAM:
1179 /* Check each drm MM node individually */
1180 while (num_pages) {
1181 if (place->fpfn < (node->start + node->size) &&
1182 !(place->lpfn && place->lpfn <= node->start))
1183 return true;
1184
1185 num_pages -= node->size;
1186 ++node;
1187 }
1188 return false;
1189
1190 default:
1191 break;
1192 }
1193
1194 return ttm_bo_eviction_valuable(bo, place);
1195 }
1196
1197 static int amdgpu_ttm_access_memory(struct ttm_buffer_object *bo,
1198 unsigned long offset,
1199 void *buf, int len, int write)
1200 {
1201 struct amdgpu_bo *abo = ttm_to_amdgpu_bo(bo);
1202 struct amdgpu_device *adev = amdgpu_ttm_adev(abo->tbo.bdev);
1203 struct drm_mm_node *nodes;
1204 uint32_t value = 0;
1205 int ret = 0;
1206 uint64_t pos;
1207 unsigned long flags;
1208
1209 if (bo->mem.mem_type != TTM_PL_VRAM)
1210 return -EIO;
1211
1212 nodes = amdgpu_find_mm_node(&abo->tbo.mem, &offset);
1213 pos = (nodes->start << PAGE_SHIFT) + offset;
1214
1215 while (len && pos < adev->mc.mc_vram_size) {
1216 uint64_t aligned_pos = pos & ~(uint64_t)3;
1217 uint32_t bytes = 4 - (pos & 3);
1218 uint32_t shift = (pos & 3) * 8;
1219 uint32_t mask = 0xffffffff << shift;
1220
1221 if (len < bytes) {
1222 mask &= 0xffffffff >> (bytes - len) * 8;
1223 bytes = len;
1224 }
1225
1226 spin_lock_irqsave(&adev->mmio_idx_lock, flags);
1227 WREG32_NO_KIQ(mmMM_INDEX, ((uint32_t)aligned_pos) | 0x80000000);
1228 WREG32_NO_KIQ(mmMM_INDEX_HI, aligned_pos >> 31);
1229 if (!write || mask != 0xffffffff)
1230 value = RREG32_NO_KIQ(mmMM_DATA);
1231 if (write) {
1232 value &= ~mask;
1233 value |= (*(uint32_t *)buf << shift) & mask;
1234 WREG32_NO_KIQ(mmMM_DATA, value);
1235 }
1236 spin_unlock_irqrestore(&adev->mmio_idx_lock, flags);
1237 if (!write) {
1238 value = (value & mask) >> shift;
1239 memcpy(buf, &value, bytes);
1240 }
1241
1242 ret += bytes;
1243 buf = (uint8_t *)buf + bytes;
1244 pos += bytes;
1245 len -= bytes;
1246 if (pos >= (nodes->start + nodes->size) << PAGE_SHIFT) {
1247 ++nodes;
1248 pos = (nodes->start << PAGE_SHIFT);
1249 }
1250 }
1251
1252 return ret;
1253 }
1254
1255 static struct ttm_bo_driver amdgpu_bo_driver = {
1256 .ttm_tt_create = &amdgpu_ttm_tt_create,
1257 .ttm_tt_populate = &amdgpu_ttm_tt_populate,
1258 .ttm_tt_unpopulate = &amdgpu_ttm_tt_unpopulate,
1259 .invalidate_caches = &amdgpu_invalidate_caches,
1260 .init_mem_type = &amdgpu_init_mem_type,
1261 .eviction_valuable = amdgpu_ttm_bo_eviction_valuable,
1262 .evict_flags = &amdgpu_evict_flags,
1263 .move = &amdgpu_bo_move,
1264 .verify_access = &amdgpu_verify_access,
1265 .move_notify = &amdgpu_bo_move_notify,
1266 .fault_reserve_notify = &amdgpu_bo_fault_reserve_notify,
1267 .io_mem_reserve = &amdgpu_ttm_io_mem_reserve,
1268 .io_mem_free = &amdgpu_ttm_io_mem_free,
1269 .io_mem_pfn = amdgpu_ttm_io_mem_pfn,
1270 .access_memory = &amdgpu_ttm_access_memory
1271 };
1272
1273 /*
1274 * Firmware Reservation functions
1275 */
1276 /**
1277 * amdgpu_ttm_fw_reserve_vram_fini - free fw reserved vram
1278 *
1279 * @adev: amdgpu_device pointer
1280 *
1281 * free fw reserved vram if it has been reserved.
1282 */
1283 static void amdgpu_ttm_fw_reserve_vram_fini(struct amdgpu_device *adev)
1284 {
1285 amdgpu_bo_free_kernel(&adev->fw_vram_usage.reserved_bo,
1286 NULL, &adev->fw_vram_usage.va);
1287 }
1288
1289 /**
1290 * amdgpu_ttm_fw_reserve_vram_init - create bo vram reservation from fw
1291 *
1292 * @adev: amdgpu_device pointer
1293 *
1294 * create bo vram reservation from fw.
1295 */
1296 static int amdgpu_ttm_fw_reserve_vram_init(struct amdgpu_device *adev)
1297 {
1298 struct ttm_operation_ctx ctx = { false, false };
1299 int r = 0;
1300 int i;
1301 u64 vram_size = adev->mc.visible_vram_size;
1302 u64 offset = adev->fw_vram_usage.start_offset;
1303 u64 size = adev->fw_vram_usage.size;
1304 struct amdgpu_bo *bo;
1305
1306 adev->fw_vram_usage.va = NULL;
1307 adev->fw_vram_usage.reserved_bo = NULL;
1308
1309 if (adev->fw_vram_usage.size > 0 &&
1310 adev->fw_vram_usage.size <= vram_size) {
1311
1312 r = amdgpu_bo_create(adev, adev->fw_vram_usage.size,
1313 PAGE_SIZE, true, AMDGPU_GEM_DOMAIN_VRAM,
1314 AMDGPU_GEM_CREATE_CPU_ACCESS_REQUIRED |
1315 AMDGPU_GEM_CREATE_VRAM_CONTIGUOUS, NULL, NULL, 0,
1316 &adev->fw_vram_usage.reserved_bo);
1317 if (r)
1318 goto error_create;
1319
1320 r = amdgpu_bo_reserve(adev->fw_vram_usage.reserved_bo, false);
1321 if (r)
1322 goto error_reserve;
1323
1324 /* remove the original mem node and create a new one at the
1325 * request position
1326 */
1327 bo = adev->fw_vram_usage.reserved_bo;
1328 offset = ALIGN(offset, PAGE_SIZE);
1329 for (i = 0; i < bo->placement.num_placement; ++i) {
1330 bo->placements[i].fpfn = offset >> PAGE_SHIFT;
1331 bo->placements[i].lpfn = (offset + size) >> PAGE_SHIFT;
1332 }
1333
1334 ttm_bo_mem_put(&bo->tbo, &bo->tbo.mem);
1335 r = ttm_bo_mem_space(&bo->tbo, &bo->placement,
1336 &bo->tbo.mem, &ctx);
1337 if (r)
1338 goto error_pin;
1339
1340 r = amdgpu_bo_pin_restricted(adev->fw_vram_usage.reserved_bo,
1341 AMDGPU_GEM_DOMAIN_VRAM,
1342 adev->fw_vram_usage.start_offset,
1343 (adev->fw_vram_usage.start_offset +
1344 adev->fw_vram_usage.size), NULL);
1345 if (r)
1346 goto error_pin;
1347 r = amdgpu_bo_kmap(adev->fw_vram_usage.reserved_bo,
1348 &adev->fw_vram_usage.va);
1349 if (r)
1350 goto error_kmap;
1351
1352 amdgpu_bo_unreserve(adev->fw_vram_usage.reserved_bo);
1353 }
1354 return r;
1355
1356 error_kmap:
1357 amdgpu_bo_unpin(adev->fw_vram_usage.reserved_bo);
1358 error_pin:
1359 amdgpu_bo_unreserve(adev->fw_vram_usage.reserved_bo);
1360 error_reserve:
1361 amdgpu_bo_unref(&adev->fw_vram_usage.reserved_bo);
1362 error_create:
1363 adev->fw_vram_usage.va = NULL;
1364 adev->fw_vram_usage.reserved_bo = NULL;
1365 return r;
1366 }
1367
1368 int amdgpu_ttm_init(struct amdgpu_device *adev)
1369 {
1370 uint64_t gtt_size;
1371 int r;
1372 u64 vis_vram_limit;
1373
1374 r = amdgpu_ttm_global_init(adev);
1375 if (r) {
1376 return r;
1377 }
1378 /* No others user of address space so set it to 0 */
1379 r = ttm_bo_device_init(&adev->mman.bdev,
1380 adev->mman.bo_global_ref.ref.object,
1381 &amdgpu_bo_driver,
1382 adev->ddev->anon_inode->i_mapping,
1383 DRM_FILE_PAGE_OFFSET,
1384 adev->need_dma32);
1385 if (r) {
1386 DRM_ERROR("failed initializing buffer object driver(%d).\n", r);
1387 return r;
1388 }
1389 adev->mman.initialized = true;
1390 r = ttm_bo_init_mm(&adev->mman.bdev, TTM_PL_VRAM,
1391 adev->mc.real_vram_size >> PAGE_SHIFT);
1392 if (r) {
1393 DRM_ERROR("Failed initializing VRAM heap.\n");
1394 return r;
1395 }
1396
1397 /* Reduce size of CPU-visible VRAM if requested */
1398 vis_vram_limit = (u64)amdgpu_vis_vram_limit * 1024 * 1024;
1399 if (amdgpu_vis_vram_limit > 0 &&
1400 vis_vram_limit <= adev->mc.visible_vram_size)
1401 adev->mc.visible_vram_size = vis_vram_limit;
1402
1403 /* Change the size here instead of the init above so only lpfn is affected */
1404 amdgpu_ttm_set_active_vram_size(adev, adev->mc.visible_vram_size);
1405
1406 /*
1407 *The reserved vram for firmware must be pinned to the specified
1408 *place on the VRAM, so reserve it early.
1409 */
1410 r = amdgpu_ttm_fw_reserve_vram_init(adev);
1411 if (r) {
1412 return r;
1413 }
1414
1415 r = amdgpu_bo_create_kernel(adev, adev->mc.stolen_size, PAGE_SIZE,
1416 AMDGPU_GEM_DOMAIN_VRAM,
1417 &adev->stolen_vga_memory,
1418 NULL, NULL);
1419 if (r)
1420 return r;
1421 DRM_INFO("amdgpu: %uM of VRAM memory ready\n",
1422 (unsigned) (adev->mc.real_vram_size / (1024 * 1024)));
1423
1424 if (amdgpu_gtt_size == -1) {
1425 struct sysinfo si;
1426
1427 si_meminfo(&si);
1428 gtt_size = min(max((AMDGPU_DEFAULT_GTT_SIZE_MB << 20),
1429 adev->mc.mc_vram_size),
1430 ((uint64_t)si.totalram * si.mem_unit * 3/4));
1431 }
1432 else
1433 gtt_size = (uint64_t)amdgpu_gtt_size << 20;
1434 r = ttm_bo_init_mm(&adev->mman.bdev, TTM_PL_TT, gtt_size >> PAGE_SHIFT);
1435 if (r) {
1436 DRM_ERROR("Failed initializing GTT heap.\n");
1437 return r;
1438 }
1439 DRM_INFO("amdgpu: %uM of GTT memory ready.\n",
1440 (unsigned)(gtt_size / (1024 * 1024)));
1441
1442 adev->gds.mem.total_size = adev->gds.mem.total_size << AMDGPU_GDS_SHIFT;
1443 adev->gds.mem.gfx_partition_size = adev->gds.mem.gfx_partition_size << AMDGPU_GDS_SHIFT;
1444 adev->gds.mem.cs_partition_size = adev->gds.mem.cs_partition_size << AMDGPU_GDS_SHIFT;
1445 adev->gds.gws.total_size = adev->gds.gws.total_size << AMDGPU_GWS_SHIFT;
1446 adev->gds.gws.gfx_partition_size = adev->gds.gws.gfx_partition_size << AMDGPU_GWS_SHIFT;
1447 adev->gds.gws.cs_partition_size = adev->gds.gws.cs_partition_size << AMDGPU_GWS_SHIFT;
1448 adev->gds.oa.total_size = adev->gds.oa.total_size << AMDGPU_OA_SHIFT;
1449 adev->gds.oa.gfx_partition_size = adev->gds.oa.gfx_partition_size << AMDGPU_OA_SHIFT;
1450 adev->gds.oa.cs_partition_size = adev->gds.oa.cs_partition_size << AMDGPU_OA_SHIFT;
1451 /* GDS Memory */
1452 if (adev->gds.mem.total_size) {
1453 r = ttm_bo_init_mm(&adev->mman.bdev, AMDGPU_PL_GDS,
1454 adev->gds.mem.total_size >> PAGE_SHIFT);
1455 if (r) {
1456 DRM_ERROR("Failed initializing GDS heap.\n");
1457 return r;
1458 }
1459 }
1460
1461 /* GWS */
1462 if (adev->gds.gws.total_size) {
1463 r = ttm_bo_init_mm(&adev->mman.bdev, AMDGPU_PL_GWS,
1464 adev->gds.gws.total_size >> PAGE_SHIFT);
1465 if (r) {
1466 DRM_ERROR("Failed initializing gws heap.\n");
1467 return r;
1468 }
1469 }
1470
1471 /* OA */
1472 if (adev->gds.oa.total_size) {
1473 r = ttm_bo_init_mm(&adev->mman.bdev, AMDGPU_PL_OA,
1474 adev->gds.oa.total_size >> PAGE_SHIFT);
1475 if (r) {
1476 DRM_ERROR("Failed initializing oa heap.\n");
1477 return r;
1478 }
1479 }
1480
1481 r = amdgpu_ttm_debugfs_init(adev);
1482 if (r) {
1483 DRM_ERROR("Failed to init debugfs\n");
1484 return r;
1485 }
1486 return 0;
1487 }
1488
1489 void amdgpu_ttm_fini(struct amdgpu_device *adev)
1490 {
1491 if (!adev->mman.initialized)
1492 return;
1493
1494 amdgpu_ttm_debugfs_fini(adev);
1495 amdgpu_bo_free_kernel(&adev->stolen_vga_memory, NULL, NULL);
1496 amdgpu_ttm_fw_reserve_vram_fini(adev);
1497
1498 ttm_bo_clean_mm(&adev->mman.bdev, TTM_PL_VRAM);
1499 ttm_bo_clean_mm(&adev->mman.bdev, TTM_PL_TT);
1500 if (adev->gds.mem.total_size)
1501 ttm_bo_clean_mm(&adev->mman.bdev, AMDGPU_PL_GDS);
1502 if (adev->gds.gws.total_size)
1503 ttm_bo_clean_mm(&adev->mman.bdev, AMDGPU_PL_GWS);
1504 if (adev->gds.oa.total_size)
1505 ttm_bo_clean_mm(&adev->mman.bdev, AMDGPU_PL_OA);
1506 ttm_bo_device_release(&adev->mman.bdev);
1507 amdgpu_ttm_global_fini(adev);
1508 adev->mman.initialized = false;
1509 DRM_INFO("amdgpu: ttm finalized\n");
1510 }
1511
1512 /* this should only be called at bootup or when userspace
1513 * isn't running */
1514 void amdgpu_ttm_set_active_vram_size(struct amdgpu_device *adev, u64 size)
1515 {
1516 struct ttm_mem_type_manager *man;
1517
1518 if (!adev->mman.initialized)
1519 return;
1520
1521 man = &adev->mman.bdev.man[TTM_PL_VRAM];
1522 /* this just adjusts TTM size idea, which sets lpfn to the correct value */
1523 man->size = size >> PAGE_SHIFT;
1524 }
1525
1526 int amdgpu_mmap(struct file *filp, struct vm_area_struct *vma)
1527 {
1528 struct drm_file *file_priv;
1529 struct amdgpu_device *adev;
1530
1531 if (unlikely(vma->vm_pgoff < DRM_FILE_PAGE_OFFSET))
1532 return -EINVAL;
1533
1534 file_priv = filp->private_data;
1535 adev = file_priv->minor->dev->dev_private;
1536 if (adev == NULL)
1537 return -EINVAL;
1538
1539 return ttm_bo_mmap(filp, vma, &adev->mman.bdev);
1540 }
1541
1542 static int amdgpu_map_buffer(struct ttm_buffer_object *bo,
1543 struct ttm_mem_reg *mem, unsigned num_pages,
1544 uint64_t offset, unsigned window,
1545 struct amdgpu_ring *ring,
1546 uint64_t *addr)
1547 {
1548 struct amdgpu_ttm_tt *gtt = (void *)bo->ttm;
1549 struct amdgpu_device *adev = ring->adev;
1550 struct ttm_tt *ttm = bo->ttm;
1551 struct amdgpu_job *job;
1552 unsigned num_dw, num_bytes;
1553 dma_addr_t *dma_address;
1554 struct dma_fence *fence;
1555 uint64_t src_addr, dst_addr;
1556 uint64_t flags;
1557 int r;
1558
1559 BUG_ON(adev->mman.buffer_funcs->copy_max_bytes <
1560 AMDGPU_GTT_MAX_TRANSFER_SIZE * 8);
1561
1562 *addr = adev->mc.gart_start;
1563 *addr += (u64)window * AMDGPU_GTT_MAX_TRANSFER_SIZE *
1564 AMDGPU_GPU_PAGE_SIZE;
1565
1566 num_dw = adev->mman.buffer_funcs->copy_num_dw;
1567 while (num_dw & 0x7)
1568 num_dw++;
1569
1570 num_bytes = num_pages * 8;
1571
1572 r = amdgpu_job_alloc_with_ib(adev, num_dw * 4 + num_bytes, &job);
1573 if (r)
1574 return r;
1575
1576 src_addr = num_dw * 4;
1577 src_addr += job->ibs[0].gpu_addr;
1578
1579 dst_addr = adev->gart.table_addr;
1580 dst_addr += window * AMDGPU_GTT_MAX_TRANSFER_SIZE * 8;
1581 amdgpu_emit_copy_buffer(adev, &job->ibs[0], src_addr,
1582 dst_addr, num_bytes);
1583
1584 amdgpu_ring_pad_ib(ring, &job->ibs[0]);
1585 WARN_ON(job->ibs[0].length_dw > num_dw);
1586
1587 dma_address = &gtt->ttm.dma_address[offset >> PAGE_SHIFT];
1588 flags = amdgpu_ttm_tt_pte_flags(adev, ttm, mem);
1589 r = amdgpu_gart_map(adev, 0, num_pages, dma_address, flags,
1590 &job->ibs[0].ptr[num_dw]);
1591 if (r)
1592 goto error_free;
1593
1594 r = amdgpu_job_submit(job, ring, &adev->mman.entity,
1595 AMDGPU_FENCE_OWNER_UNDEFINED, &fence);
1596 if (r)
1597 goto error_free;
1598
1599 dma_fence_put(fence);
1600
1601 return r;
1602
1603 error_free:
1604 amdgpu_job_free(job);
1605 return r;
1606 }
1607
1608 int amdgpu_copy_buffer(struct amdgpu_ring *ring, uint64_t src_offset,
1609 uint64_t dst_offset, uint32_t byte_count,
1610 struct reservation_object *resv,
1611 struct dma_fence **fence, bool direct_submit,
1612 bool vm_needs_flush)
1613 {
1614 struct amdgpu_device *adev = ring->adev;
1615 struct amdgpu_job *job;
1616
1617 uint32_t max_bytes;
1618 unsigned num_loops, num_dw;
1619 unsigned i;
1620 int r;
1621
1622 max_bytes = adev->mman.buffer_funcs->copy_max_bytes;
1623 num_loops = DIV_ROUND_UP(byte_count, max_bytes);
1624 num_dw = num_loops * adev->mman.buffer_funcs->copy_num_dw;
1625
1626 /* for IB padding */
1627 while (num_dw & 0x7)
1628 num_dw++;
1629
1630 r = amdgpu_job_alloc_with_ib(adev, num_dw * 4, &job);
1631 if (r)
1632 return r;
1633
1634 job->vm_needs_flush = vm_needs_flush;
1635 if (resv) {
1636 r = amdgpu_sync_resv(adev, &job->sync, resv,
1637 AMDGPU_FENCE_OWNER_UNDEFINED,
1638 false);
1639 if (r) {
1640 DRM_ERROR("sync failed (%d).\n", r);
1641 goto error_free;
1642 }
1643 }
1644
1645 for (i = 0; i < num_loops; i++) {
1646 uint32_t cur_size_in_bytes = min(byte_count, max_bytes);
1647
1648 amdgpu_emit_copy_buffer(adev, &job->ibs[0], src_offset,
1649 dst_offset, cur_size_in_bytes);
1650
1651 src_offset += cur_size_in_bytes;
1652 dst_offset += cur_size_in_bytes;
1653 byte_count -= cur_size_in_bytes;
1654 }
1655
1656 amdgpu_ring_pad_ib(ring, &job->ibs[0]);
1657 WARN_ON(job->ibs[0].length_dw > num_dw);
1658 if (direct_submit) {
1659 r = amdgpu_ib_schedule(ring, job->num_ibs, job->ibs,
1660 NULL, fence);
1661 job->fence = dma_fence_get(*fence);
1662 if (r)
1663 DRM_ERROR("Error scheduling IBs (%d)\n", r);
1664 amdgpu_job_free(job);
1665 } else {
1666 r = amdgpu_job_submit(job, ring, &adev->mman.entity,
1667 AMDGPU_FENCE_OWNER_UNDEFINED, fence);
1668 if (r)
1669 goto error_free;
1670 }
1671
1672 return r;
1673
1674 error_free:
1675 amdgpu_job_free(job);
1676 return r;
1677 }
1678
1679 int amdgpu_fill_buffer(struct amdgpu_bo *bo,
1680 uint64_t src_data,
1681 struct reservation_object *resv,
1682 struct dma_fence **fence)
1683 {
1684 struct amdgpu_device *adev = amdgpu_ttm_adev(bo->tbo.bdev);
1685 uint32_t max_bytes = 8 *
1686 adev->vm_manager.vm_pte_funcs->set_max_nums_pte_pde;
1687 struct amdgpu_ring *ring = adev->mman.buffer_funcs_ring;
1688
1689 struct drm_mm_node *mm_node;
1690 unsigned long num_pages;
1691 unsigned int num_loops, num_dw;
1692
1693 struct amdgpu_job *job;
1694 int r;
1695
1696 if (!ring->ready) {
1697 DRM_ERROR("Trying to clear memory with ring turned off.\n");
1698 return -EINVAL;
1699 }
1700
1701 if (bo->tbo.mem.mem_type == TTM_PL_TT) {
1702 r = amdgpu_ttm_alloc_gart(&bo->tbo);
1703 if (r)
1704 return r;
1705 }
1706
1707 num_pages = bo->tbo.num_pages;
1708 mm_node = bo->tbo.mem.mm_node;
1709 num_loops = 0;
1710 while (num_pages) {
1711 uint32_t byte_count = mm_node->size << PAGE_SHIFT;
1712
1713 num_loops += DIV_ROUND_UP(byte_count, max_bytes);
1714 num_pages -= mm_node->size;
1715 ++mm_node;
1716 }
1717
1718 /* num of dwords for each SDMA_OP_PTEPDE cmd */
1719 num_dw = num_loops * adev->vm_manager.vm_pte_funcs->set_pte_pde_num_dw;
1720
1721 /* for IB padding */
1722 num_dw += 64;
1723
1724 r = amdgpu_job_alloc_with_ib(adev, num_dw * 4, &job);
1725 if (r)
1726 return r;
1727
1728 if (resv) {
1729 r = amdgpu_sync_resv(adev, &job->sync, resv,
1730 AMDGPU_FENCE_OWNER_UNDEFINED, false);
1731 if (r) {
1732 DRM_ERROR("sync failed (%d).\n", r);
1733 goto error_free;
1734 }
1735 }
1736
1737 num_pages = bo->tbo.num_pages;
1738 mm_node = bo->tbo.mem.mm_node;
1739
1740 while (num_pages) {
1741 uint32_t byte_count = mm_node->size << PAGE_SHIFT;
1742 uint64_t dst_addr;
1743
1744 WARN_ONCE(byte_count & 0x7, "size should be a multiple of 8");
1745
1746 dst_addr = amdgpu_mm_node_addr(&bo->tbo, mm_node, &bo->tbo.mem);
1747 while (byte_count) {
1748 uint32_t cur_size_in_bytes = min(byte_count, max_bytes);
1749
1750 amdgpu_vm_set_pte_pde(adev, &job->ibs[0],
1751 dst_addr, 0,
1752 cur_size_in_bytes >> 3, 0,
1753 src_data);
1754
1755 dst_addr += cur_size_in_bytes;
1756 byte_count -= cur_size_in_bytes;
1757 }
1758
1759 num_pages -= mm_node->size;
1760 ++mm_node;
1761 }
1762
1763 amdgpu_ring_pad_ib(ring, &job->ibs[0]);
1764 WARN_ON(job->ibs[0].length_dw > num_dw);
1765 r = amdgpu_job_submit(job, ring, &adev->mman.entity,
1766 AMDGPU_FENCE_OWNER_UNDEFINED, fence);
1767 if (r)
1768 goto error_free;
1769
1770 return 0;
1771
1772 error_free:
1773 amdgpu_job_free(job);
1774 return r;
1775 }
1776
1777 #if defined(CONFIG_DEBUG_FS)
1778
1779 static int amdgpu_mm_dump_table(struct seq_file *m, void *data)
1780 {
1781 struct drm_info_node *node = (struct drm_info_node *)m->private;
1782 unsigned ttm_pl = *(int *)node->info_ent->data;
1783 struct drm_device *dev = node->minor->dev;
1784 struct amdgpu_device *adev = dev->dev_private;
1785 struct ttm_mem_type_manager *man = &adev->mman.bdev.man[ttm_pl];
1786 struct drm_printer p = drm_seq_file_printer(m);
1787
1788 man->func->debug(man, &p);
1789 return 0;
1790 }
1791
1792 static int ttm_pl_vram = TTM_PL_VRAM;
1793 static int ttm_pl_tt = TTM_PL_TT;
1794
1795 static const struct drm_info_list amdgpu_ttm_debugfs_list[] = {
1796 {"amdgpu_vram_mm", amdgpu_mm_dump_table, 0, &ttm_pl_vram},
1797 {"amdgpu_gtt_mm", amdgpu_mm_dump_table, 0, &ttm_pl_tt},
1798 {"ttm_page_pool", ttm_page_alloc_debugfs, 0, NULL},
1799 #ifdef CONFIG_SWIOTLB
1800 {"ttm_dma_page_pool", ttm_dma_page_alloc_debugfs, 0, NULL}
1801 #endif
1802 };
1803
1804 static ssize_t amdgpu_ttm_vram_read(struct file *f, char __user *buf,
1805 size_t size, loff_t *pos)
1806 {
1807 struct amdgpu_device *adev = file_inode(f)->i_private;
1808 ssize_t result = 0;
1809 int r;
1810
1811 if (size & 0x3 || *pos & 0x3)
1812 return -EINVAL;
1813
1814 if (*pos >= adev->mc.mc_vram_size)
1815 return -ENXIO;
1816
1817 while (size) {
1818 unsigned long flags;
1819 uint32_t value;
1820
1821 if (*pos >= adev->mc.mc_vram_size)
1822 return result;
1823
1824 spin_lock_irqsave(&adev->mmio_idx_lock, flags);
1825 WREG32_NO_KIQ(mmMM_INDEX, ((uint32_t)*pos) | 0x80000000);
1826 WREG32_NO_KIQ(mmMM_INDEX_HI, *pos >> 31);
1827 value = RREG32_NO_KIQ(mmMM_DATA);
1828 spin_unlock_irqrestore(&adev->mmio_idx_lock, flags);
1829
1830 r = put_user(value, (uint32_t *)buf);
1831 if (r)
1832 return r;
1833
1834 result += 4;
1835 buf += 4;
1836 *pos += 4;
1837 size -= 4;
1838 }
1839
1840 return result;
1841 }
1842
1843 static ssize_t amdgpu_ttm_vram_write(struct file *f, const char __user *buf,
1844 size_t size, loff_t *pos)
1845 {
1846 struct amdgpu_device *adev = file_inode(f)->i_private;
1847 ssize_t result = 0;
1848 int r;
1849
1850 if (size & 0x3 || *pos & 0x3)
1851 return -EINVAL;
1852
1853 if (*pos >= adev->mc.mc_vram_size)
1854 return -ENXIO;
1855
1856 while (size) {
1857 unsigned long flags;
1858 uint32_t value;
1859
1860 if (*pos >= adev->mc.mc_vram_size)
1861 return result;
1862
1863 r = get_user(value, (uint32_t *)buf);
1864 if (r)
1865 return r;
1866
1867 spin_lock_irqsave(&adev->mmio_idx_lock, flags);
1868 WREG32_NO_KIQ(mmMM_INDEX, ((uint32_t)*pos) | 0x80000000);
1869 WREG32_NO_KIQ(mmMM_INDEX_HI, *pos >> 31);
1870 WREG32_NO_KIQ(mmMM_DATA, value);
1871 spin_unlock_irqrestore(&adev->mmio_idx_lock, flags);
1872
1873 result += 4;
1874 buf += 4;
1875 *pos += 4;
1876 size -= 4;
1877 }
1878
1879 return result;
1880 }
1881
1882 static const struct file_operations amdgpu_ttm_vram_fops = {
1883 .owner = THIS_MODULE,
1884 .read = amdgpu_ttm_vram_read,
1885 .write = amdgpu_ttm_vram_write,
1886 .llseek = default_llseek,
1887 };
1888
1889 #ifdef CONFIG_DRM_AMDGPU_GART_DEBUGFS
1890
1891 static ssize_t amdgpu_ttm_gtt_read(struct file *f, char __user *buf,
1892 size_t size, loff_t *pos)
1893 {
1894 struct amdgpu_device *adev = file_inode(f)->i_private;
1895 ssize_t result = 0;
1896 int r;
1897
1898 while (size) {
1899 loff_t p = *pos / PAGE_SIZE;
1900 unsigned off = *pos & ~PAGE_MASK;
1901 size_t cur_size = min_t(size_t, size, PAGE_SIZE - off);
1902 struct page *page;
1903 void *ptr;
1904
1905 if (p >= adev->gart.num_cpu_pages)
1906 return result;
1907
1908 page = adev->gart.pages[p];
1909 if (page) {
1910 ptr = kmap(page);
1911 ptr += off;
1912
1913 r = copy_to_user(buf, ptr, cur_size);
1914 kunmap(adev->gart.pages[p]);
1915 } else
1916 r = clear_user(buf, cur_size);
1917
1918 if (r)
1919 return -EFAULT;
1920
1921 result += cur_size;
1922 buf += cur_size;
1923 *pos += cur_size;
1924 size -= cur_size;
1925 }
1926
1927 return result;
1928 }
1929
1930 static const struct file_operations amdgpu_ttm_gtt_fops = {
1931 .owner = THIS_MODULE,
1932 .read = amdgpu_ttm_gtt_read,
1933 .llseek = default_llseek
1934 };
1935
1936 #endif
1937
1938 static ssize_t amdgpu_iova_to_phys_read(struct file *f, char __user *buf,
1939 size_t size, loff_t *pos)
1940 {
1941 struct amdgpu_device *adev = file_inode(f)->i_private;
1942 int r;
1943 uint64_t phys;
1944 struct iommu_domain *dom;
1945
1946 // always return 8 bytes
1947 if (size != 8)
1948 return -EINVAL;
1949
1950 // only accept page addresses
1951 if (*pos & 0xFFF)
1952 return -EINVAL;
1953
1954 dom = iommu_get_domain_for_dev(adev->dev);
1955 if (dom)
1956 phys = iommu_iova_to_phys(dom, *pos);
1957 else
1958 phys = *pos;
1959
1960 r = copy_to_user(buf, &phys, 8);
1961 if (r)
1962 return -EFAULT;
1963
1964 return 8;
1965 }
1966
1967 static const struct file_operations amdgpu_ttm_iova_fops = {
1968 .owner = THIS_MODULE,
1969 .read = amdgpu_iova_to_phys_read,
1970 .llseek = default_llseek
1971 };
1972
1973 static const struct {
1974 char *name;
1975 const struct file_operations *fops;
1976 int domain;
1977 } ttm_debugfs_entries[] = {
1978 { "amdgpu_vram", &amdgpu_ttm_vram_fops, TTM_PL_VRAM },
1979 #ifdef CONFIG_DRM_AMDGPU_GART_DEBUGFS
1980 { "amdgpu_gtt", &amdgpu_ttm_gtt_fops, TTM_PL_TT },
1981 #endif
1982 { "amdgpu_iova", &amdgpu_ttm_iova_fops, TTM_PL_SYSTEM },
1983 };
1984
1985 #endif
1986
1987 static int amdgpu_ttm_debugfs_init(struct amdgpu_device *adev)
1988 {
1989 #if defined(CONFIG_DEBUG_FS)
1990 unsigned count;
1991
1992 struct drm_minor *minor = adev->ddev->primary;
1993 struct dentry *ent, *root = minor->debugfs_root;
1994
1995 for (count = 0; count < ARRAY_SIZE(ttm_debugfs_entries); count++) {
1996 ent = debugfs_create_file(
1997 ttm_debugfs_entries[count].name,
1998 S_IFREG | S_IRUGO, root,
1999 adev,
2000 ttm_debugfs_entries[count].fops);
2001 if (IS_ERR(ent))
2002 return PTR_ERR(ent);
2003 if (ttm_debugfs_entries[count].domain == TTM_PL_VRAM)
2004 i_size_write(ent->d_inode, adev->mc.mc_vram_size);
2005 else if (ttm_debugfs_entries[count].domain == TTM_PL_TT)
2006 i_size_write(ent->d_inode, adev->mc.gart_size);
2007 adev->mman.debugfs_entries[count] = ent;
2008 }
2009
2010 count = ARRAY_SIZE(amdgpu_ttm_debugfs_list);
2011
2012 #ifdef CONFIG_SWIOTLB
2013 if (!swiotlb_nr_tbl())
2014 --count;
2015 #endif
2016
2017 return amdgpu_debugfs_add_files(adev, amdgpu_ttm_debugfs_list, count);
2018 #else
2019 return 0;
2020 #endif
2021 }
2022
2023 static void amdgpu_ttm_debugfs_fini(struct amdgpu_device *adev)
2024 {
2025 #if defined(CONFIG_DEBUG_FS)
2026 unsigned i;
2027
2028 for (i = 0; i < ARRAY_SIZE(ttm_debugfs_entries); i++)
2029 debugfs_remove(adev->mman.debugfs_entries[i]);
2030 #endif
2031 }
CRIS linux kernel tree