1 /*
2 * Copyright 2009 Jerome Glisse.
3 * All Rights Reserved.
4 *
5 * Permission is hereby granted, free of charge, to any person obtaining a
6 * copy of this software and associated documentation files (the
7 * "Software"), to deal in the Software without restriction, including
8 * without limitation the rights to use, copy, modify, merge, publish,
9 * distribute, sub license, and/or sell copies of the Software, and to
10 * permit persons to whom the Software is furnished to do so, subject to
11 * the following conditions:
12 *
13 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
14 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
15 * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL
16 * THE COPYRIGHT HOLDERS, AUTHORS AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM,
17 * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
18 * OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
19 * USE OR OTHER DEALINGS IN THE SOFTWARE.
20 *
21 * The above copyright notice and this permission notice (including the
22 * next paragraph) shall be included in all copies or substantial portions
23 * of the Software.
24 *
25 */
26 /*
27 * Authors:
28 * Jerome Glisse <glisse@freedesktop.org>
29 * Thomas Hellstrom <thomas-at-tungstengraphics-dot-com>
30 * Dave Airlie
31 */
32
33 #include <linux/dma-mapping.h>
34 #include <linux/iommu.h>
35 #include <linux/hmm.h>
36 #include <linux/pagemap.h>
37 #include <linux/sched/task.h>
38 #include <linux/sched/mm.h>
39 #include <linux/seq_file.h>
40 #include <linux/slab.h>
41 #include <linux/swap.h>
42 #include <linux/swiotlb.h>
43 #include <linux/dma-buf.h>
44 #include <linux/sizes.h>
45
46 #include <drm/ttm/ttm_bo_api.h>
47 #include <drm/ttm/ttm_bo_driver.h>
48 #include <drm/ttm/ttm_placement.h>
49 #include <drm/ttm/ttm_module.h>
50 #include <drm/ttm/ttm_page_alloc.h>
51
52 #include <drm/drm_debugfs.h>
53 #include <drm/amdgpu_drm.h>
54
55 #include "amdgpu.h"
56 #include "amdgpu_object.h"
57 #include "amdgpu_trace.h"
58 #include "amdgpu_amdkfd.h"
59 #include "amdgpu_sdma.h"
60 #include "amdgpu_ras.h"
61 #include "amdgpu_atomfirmware.h"
62 #include "bif/bif_4_1_d.h"
63
64 #define AMDGPU_TTM_VRAM_MAX_DW_READ (size_t)128
65
66 static int amdgpu_ttm_backend_bind(struct ttm_bo_device *bdev,
67 struct ttm_tt *ttm,
68 struct ttm_resource *bo_mem);
69
amdgpu_ttm_init_on_chip(struct amdgpu_device * adev,unsigned int type,uint64_t size_in_page)70 static int amdgpu_ttm_init_on_chip(struct amdgpu_device *adev,
71 unsigned int type,
72 uint64_t size_in_page)
73 {
74 return ttm_range_man_init(&adev->mman.bdev, type,
75 false, size_in_page);
76 }
77
78 /**
79 * amdgpu_evict_flags - Compute placement flags
80 *
81 * @bo: The buffer object to evict
82 * @placement: Possible destination(s) for evicted BO
83 *
84 * Fill in placement data when ttm_bo_evict() is called
85 */
amdgpu_evict_flags(struct ttm_buffer_object * bo,struct ttm_placement * placement)86 static void amdgpu_evict_flags(struct ttm_buffer_object *bo,
87 struct ttm_placement *placement)
88 {
89 struct amdgpu_device *adev = amdgpu_ttm_adev(bo->bdev);
90 struct amdgpu_bo *abo;
91 static const struct ttm_place placements = {
92 .fpfn = 0,
93 .lpfn = 0,
94 .mem_type = TTM_PL_SYSTEM,
95 .flags = TTM_PL_MASK_CACHING
96 };
97
98 /* Don't handle scatter gather BOs */
99 if (bo->type == ttm_bo_type_sg) {
100 placement->num_placement = 0;
101 placement->num_busy_placement = 0;
102 return;
103 }
104
105 /* Object isn't an AMDGPU object so ignore */
106 if (!amdgpu_bo_is_amdgpu_bo(bo)) {
107 placement->placement = &placements;
108 placement->busy_placement = &placements;
109 placement->num_placement = 1;
110 placement->num_busy_placement = 1;
111 return;
112 }
113
114 abo = ttm_to_amdgpu_bo(bo);
115 switch (bo->mem.mem_type) {
116 case AMDGPU_PL_GDS:
117 case AMDGPU_PL_GWS:
118 case AMDGPU_PL_OA:
119 placement->num_placement = 0;
120 placement->num_busy_placement = 0;
121 return;
122
123 case TTM_PL_VRAM:
124 if (!adev->mman.buffer_funcs_enabled) {
125 /* Move to system memory */
126 amdgpu_bo_placement_from_domain(abo, AMDGPU_GEM_DOMAIN_CPU);
127 } else if (!amdgpu_gmc_vram_full_visible(&adev->gmc) &&
128 !(abo->flags & AMDGPU_GEM_CREATE_CPU_ACCESS_REQUIRED) &&
129 amdgpu_bo_in_cpu_visible_vram(abo)) {
130
131 /* Try evicting to the CPU inaccessible part of VRAM
132 * first, but only set GTT as busy placement, so this
133 * BO will be evicted to GTT rather than causing other
134 * BOs to be evicted from VRAM
135 */
136 amdgpu_bo_placement_from_domain(abo, AMDGPU_GEM_DOMAIN_VRAM |
137 AMDGPU_GEM_DOMAIN_GTT);
138 abo->placements[0].fpfn = adev->gmc.visible_vram_size >> PAGE_SHIFT;
139 abo->placements[0].lpfn = 0;
140 abo->placement.busy_placement = &abo->placements[1];
141 abo->placement.num_busy_placement = 1;
142 } else {
143 /* Move to GTT memory */
144 amdgpu_bo_placement_from_domain(abo, AMDGPU_GEM_DOMAIN_GTT);
145 }
146 break;
147 case TTM_PL_TT:
148 default:
149 amdgpu_bo_placement_from_domain(abo, AMDGPU_GEM_DOMAIN_CPU);
150 break;
151 }
152 *placement = abo->placement;
153 }
154
155 /**
156 * amdgpu_verify_access - Verify access for a mmap call
157 *
158 * @bo: The buffer object to map
159 * @filp: The file pointer from the process performing the mmap
160 *
161 * This is called by ttm_bo_mmap() to verify whether a process
162 * has the right to mmap a BO to their process space.
163 */
amdgpu_verify_access(struct ttm_buffer_object * bo,struct file * filp)164 static int amdgpu_verify_access(struct ttm_buffer_object *bo, struct file *filp)
165 {
166 struct amdgpu_bo *abo = ttm_to_amdgpu_bo(bo);
167
168 /*
169 * Don't verify access for KFD BOs. They don't have a GEM
170 * object associated with them.
171 */
172 if (abo->kfd_bo)
173 return 0;
174
175 if (amdgpu_ttm_tt_get_usermm(bo->ttm))
176 return -EPERM;
177 return drm_vma_node_verify_access(&abo->tbo.base.vma_node,
178 filp->private_data);
179 }
180
181 /**
182 * amdgpu_mm_node_addr - Compute the GPU relative offset of a GTT buffer.
183 *
184 * @bo: The bo to assign the memory to.
185 * @mm_node: Memory manager node for drm allocator.
186 * @mem: The region where the bo resides.
187 *
188 */
amdgpu_mm_node_addr(struct ttm_buffer_object * bo,struct drm_mm_node * mm_node,struct ttm_resource * mem)189 static uint64_t amdgpu_mm_node_addr(struct ttm_buffer_object *bo,
190 struct drm_mm_node *mm_node,
191 struct ttm_resource *mem)
192 {
193 uint64_t addr = 0;
194
195 if (mm_node->start != AMDGPU_BO_INVALID_OFFSET) {
196 addr = mm_node->start << PAGE_SHIFT;
197 addr += amdgpu_ttm_domain_start(amdgpu_ttm_adev(bo->bdev),
198 mem->mem_type);
199 }
200 return addr;
201 }
202
203 /**
204 * amdgpu_find_mm_node - Helper function finds the drm_mm_node corresponding to
205 * @offset. It also modifies the offset to be within the drm_mm_node returned
206 *
207 * @mem: The region where the bo resides.
208 * @offset: The offset that drm_mm_node is used for finding.
209 *
210 */
amdgpu_find_mm_node(struct ttm_resource * mem,uint64_t * offset)211 static struct drm_mm_node *amdgpu_find_mm_node(struct ttm_resource *mem,
212 uint64_t *offset)
213 {
214 struct drm_mm_node *mm_node = mem->mm_node;
215
216 while (*offset >= (mm_node->size << PAGE_SHIFT)) {
217 *offset -= (mm_node->size << PAGE_SHIFT);
218 ++mm_node;
219 }
220 return mm_node;
221 }
222
223 /**
224 * amdgpu_ttm_map_buffer - Map memory into the GART windows
225 * @bo: buffer object to map
226 * @mem: memory object to map
227 * @mm_node: drm_mm node object to map
228 * @num_pages: number of pages to map
229 * @offset: offset into @mm_node where to start
230 * @window: which GART window to use
231 * @ring: DMA ring to use for the copy
232 * @tmz: if we should setup a TMZ enabled mapping
233 * @addr: resulting address inside the MC address space
234 *
235 * Setup one of the GART windows to access a specific piece of memory or return
236 * the physical address for local memory.
237 */
amdgpu_ttm_map_buffer(struct ttm_buffer_object * bo,struct ttm_resource * mem,struct drm_mm_node * mm_node,unsigned num_pages,uint64_t offset,unsigned window,struct amdgpu_ring * ring,bool tmz,uint64_t * addr)238 static int amdgpu_ttm_map_buffer(struct ttm_buffer_object *bo,
239 struct ttm_resource *mem,
240 struct drm_mm_node *mm_node,
241 unsigned num_pages, uint64_t offset,
242 unsigned window, struct amdgpu_ring *ring,
243 bool tmz, uint64_t *addr)
244 {
245 struct amdgpu_device *adev = ring->adev;
246 struct amdgpu_job *job;
247 unsigned num_dw, num_bytes;
248 struct dma_fence *fence;
249 uint64_t src_addr, dst_addr;
250 void *cpu_addr;
251 uint64_t flags;
252 unsigned int i;
253 int r;
254
255 BUG_ON(adev->mman.buffer_funcs->copy_max_bytes <
256 AMDGPU_GTT_MAX_TRANSFER_SIZE * 8);
257
258 /* Map only what can't be accessed directly */
259 if (!tmz && mem->start != AMDGPU_BO_INVALID_OFFSET) {
260 *addr = amdgpu_mm_node_addr(bo, mm_node, mem) + offset;
261 return 0;
262 }
263
264 *addr = adev->gmc.gart_start;
265 *addr += (u64)window * AMDGPU_GTT_MAX_TRANSFER_SIZE *
266 AMDGPU_GPU_PAGE_SIZE;
267 *addr += offset & ~PAGE_MASK;
268
269 num_dw = ALIGN(adev->mman.buffer_funcs->copy_num_dw, 8);
270 num_bytes = num_pages * 8 * AMDGPU_GPU_PAGES_IN_CPU_PAGE;
271
272 r = amdgpu_job_alloc_with_ib(adev, num_dw * 4 + num_bytes,
273 AMDGPU_IB_POOL_DELAYED, &job);
274 if (r)
275 return r;
276
277 src_addr = num_dw * 4;
278 src_addr += job->ibs[0].gpu_addr;
279
280 dst_addr = amdgpu_bo_gpu_offset(adev->gart.bo);
281 dst_addr += window * AMDGPU_GTT_MAX_TRANSFER_SIZE * 8;
282 amdgpu_emit_copy_buffer(adev, &job->ibs[0], src_addr,
283 dst_addr, num_bytes, false);
284
285 amdgpu_ring_pad_ib(ring, &job->ibs[0]);
286 WARN_ON(job->ibs[0].length_dw > num_dw);
287
288 flags = amdgpu_ttm_tt_pte_flags(adev, bo->ttm, mem);
289 if (tmz)
290 flags |= AMDGPU_PTE_TMZ;
291
292 cpu_addr = &job->ibs[0].ptr[num_dw];
293
294 if (mem->mem_type == TTM_PL_TT) {
295 struct ttm_dma_tt *dma;
296 dma_addr_t *dma_address;
297
298 dma = container_of(bo->ttm, struct ttm_dma_tt, ttm);
299 dma_address = &dma->dma_address[offset >> PAGE_SHIFT];
300 r = amdgpu_gart_map(adev, 0, num_pages, dma_address, flags,
301 cpu_addr);
302 if (r)
303 goto error_free;
304 } else {
305 dma_addr_t dma_address;
306
307 dma_address = (mm_node->start << PAGE_SHIFT) + offset;
308 dma_address += adev->vm_manager.vram_base_offset;
309
310 for (i = 0; i < num_pages; ++i) {
311 r = amdgpu_gart_map(adev, i << PAGE_SHIFT, 1,
312 &dma_address, flags, cpu_addr);
313 if (r)
314 goto error_free;
315
316 dma_address += PAGE_SIZE;
317 }
318 }
319
320 r = amdgpu_job_submit(job, &adev->mman.entity,
321 AMDGPU_FENCE_OWNER_UNDEFINED, &fence);
322 if (r)
323 goto error_free;
324
325 dma_fence_put(fence);
326
327 return r;
328
329 error_free:
330 amdgpu_job_free(job);
331 return r;
332 }
333
334 /**
335 * amdgpu_copy_ttm_mem_to_mem - Helper function for copy
336 * @adev: amdgpu device
337 * @src: buffer/address where to read from
338 * @dst: buffer/address where to write to
339 * @size: number of bytes to copy
340 * @tmz: if a secure copy should be used
341 * @resv: resv object to sync to
342 * @f: Returns the last fence if multiple jobs are submitted.
343 *
344 * The function copies @size bytes from {src->mem + src->offset} to
345 * {dst->mem + dst->offset}. src->bo and dst->bo could be same BO for a
346 * move and different for a BO to BO copy.
347 *
348 */
amdgpu_ttm_copy_mem_to_mem(struct amdgpu_device * adev,const struct amdgpu_copy_mem * src,const struct amdgpu_copy_mem * dst,uint64_t size,bool tmz,struct dma_resv * resv,struct dma_fence ** f)349 int amdgpu_ttm_copy_mem_to_mem(struct amdgpu_device *adev,
350 const struct amdgpu_copy_mem *src,
351 const struct amdgpu_copy_mem *dst,
352 uint64_t size, bool tmz,
353 struct dma_resv *resv,
354 struct dma_fence **f)
355 {
356 const uint32_t GTT_MAX_BYTES = (AMDGPU_GTT_MAX_TRANSFER_SIZE *
357 AMDGPU_GPU_PAGE_SIZE);
358
359 uint64_t src_node_size, dst_node_size, src_offset, dst_offset;
360 struct amdgpu_ring *ring = adev->mman.buffer_funcs_ring;
361 struct drm_mm_node *src_mm, *dst_mm;
362 struct dma_fence *fence = NULL;
363 int r = 0;
364
365 if (!adev->mman.buffer_funcs_enabled) {
366 DRM_ERROR("Trying to move memory with ring turned off.\n");
367 return -EINVAL;
368 }
369
370 src_offset = src->offset;
371 if (src->mem->mm_node) {
372 src_mm = amdgpu_find_mm_node(src->mem, &src_offset);
373 src_node_size = (src_mm->size << PAGE_SHIFT) - src_offset;
374 } else {
375 src_mm = NULL;
376 src_node_size = ULLONG_MAX;
377 }
378
379 dst_offset = dst->offset;
380 if (dst->mem->mm_node) {
381 dst_mm = amdgpu_find_mm_node(dst->mem, &dst_offset);
382 dst_node_size = (dst_mm->size << PAGE_SHIFT) - dst_offset;
383 } else {
384 dst_mm = NULL;
385 dst_node_size = ULLONG_MAX;
386 }
387
388 mutex_lock(&adev->mman.gtt_window_lock);
389
390 while (size) {
391 uint32_t src_page_offset = src_offset & ~PAGE_MASK;
392 uint32_t dst_page_offset = dst_offset & ~PAGE_MASK;
393 struct dma_fence *next;
394 uint32_t cur_size;
395 uint64_t from, to;
396
397 /* Copy size cannot exceed GTT_MAX_BYTES. So if src or dst
398 * begins at an offset, then adjust the size accordingly
399 */
400 cur_size = max(src_page_offset, dst_page_offset);
401 cur_size = min(min3(src_node_size, dst_node_size, size),
402 (uint64_t)(GTT_MAX_BYTES - cur_size));
403
404 /* Map src to window 0 and dst to window 1. */
405 r = amdgpu_ttm_map_buffer(src->bo, src->mem, src_mm,
406 PFN_UP(cur_size + src_page_offset),
407 src_offset, 0, ring, tmz, &from);
408 if (r)
409 goto error;
410
411 r = amdgpu_ttm_map_buffer(dst->bo, dst->mem, dst_mm,
412 PFN_UP(cur_size + dst_page_offset),
413 dst_offset, 1, ring, tmz, &to);
414 if (r)
415 goto error;
416
417 r = amdgpu_copy_buffer(ring, from, to, cur_size,
418 resv, &next, false, true, tmz);
419 if (r)
420 goto error;
421
422 dma_fence_put(fence);
423 fence = next;
424
425 size -= cur_size;
426 if (!size)
427 break;
428
429 src_node_size -= cur_size;
430 if (!src_node_size) {
431 ++src_mm;
432 src_node_size = src_mm->size << PAGE_SHIFT;
433 src_offset = 0;
434 } else {
435 src_offset += cur_size;
436 }
437
438 dst_node_size -= cur_size;
439 if (!dst_node_size) {
440 ++dst_mm;
441 dst_node_size = dst_mm->size << PAGE_SHIFT;
442 dst_offset = 0;
443 } else {
444 dst_offset += cur_size;
445 }
446 }
447 error:
448 mutex_unlock(&adev->mman.gtt_window_lock);
449 if (f)
450 *f = dma_fence_get(fence);
451 dma_fence_put(fence);
452 return r;
453 }
454
455 /**
456 * amdgpu_move_blit - Copy an entire buffer to another buffer
457 *
458 * This is a helper called by amdgpu_bo_move() and amdgpu_move_vram_ram() to
459 * help move buffers to and from VRAM.
460 */
amdgpu_move_blit(struct ttm_buffer_object * bo,bool evict,struct ttm_resource * new_mem,struct ttm_resource * old_mem)461 static int amdgpu_move_blit(struct ttm_buffer_object *bo,
462 bool evict,
463 struct ttm_resource *new_mem,
464 struct ttm_resource *old_mem)
465 {
466 struct amdgpu_device *adev = amdgpu_ttm_adev(bo->bdev);
467 struct amdgpu_bo *abo = ttm_to_amdgpu_bo(bo);
468 struct amdgpu_copy_mem src, dst;
469 struct dma_fence *fence = NULL;
470 int r;
471
472 src.bo = bo;
473 dst.bo = bo;
474 src.mem = old_mem;
475 dst.mem = new_mem;
476 src.offset = 0;
477 dst.offset = 0;
478
479 r = amdgpu_ttm_copy_mem_to_mem(adev, &src, &dst,
480 new_mem->num_pages << PAGE_SHIFT,
481 amdgpu_bo_encrypted(abo),
482 bo->base.resv, &fence);
483 if (r)
484 goto error;
485
486 /* clear the space being freed */
487 if (old_mem->mem_type == TTM_PL_VRAM &&
488 (abo->flags & AMDGPU_GEM_CREATE_VRAM_WIPE_ON_RELEASE)) {
489 struct dma_fence *wipe_fence = NULL;
490
491 r = amdgpu_fill_buffer(ttm_to_amdgpu_bo(bo), AMDGPU_POISON,
492 NULL, &wipe_fence);
493 if (r) {
494 goto error;
495 } else if (wipe_fence) {
496 dma_fence_put(fence);
497 fence = wipe_fence;
498 }
499 }
500
501 /* Always block for VM page tables before committing the new location */
502 if (bo->type == ttm_bo_type_kernel)
503 r = ttm_bo_move_accel_cleanup(bo, fence, true, false, new_mem);
504 else
505 r = ttm_bo_move_accel_cleanup(bo, fence, evict, true, new_mem);
506 dma_fence_put(fence);
507 return r;
508
509 error:
510 if (fence)
511 dma_fence_wait(fence, false);
512 dma_fence_put(fence);
513 return r;
514 }
515
516 /**
517 * amdgpu_move_vram_ram - Copy VRAM buffer to RAM buffer
518 *
519 * Called by amdgpu_bo_move().
520 */
amdgpu_move_vram_ram(struct ttm_buffer_object * bo,bool evict,struct ttm_operation_ctx * ctx,struct ttm_resource * new_mem)521 static int amdgpu_move_vram_ram(struct ttm_buffer_object *bo, bool evict,
522 struct ttm_operation_ctx *ctx,
523 struct ttm_resource *new_mem)
524 {
525 struct ttm_resource *old_mem = &bo->mem;
526 struct ttm_resource tmp_mem;
527 struct ttm_place placements;
528 struct ttm_placement placement;
529 int r;
530
531 /* create space/pages for new_mem in GTT space */
532 tmp_mem = *new_mem;
533 tmp_mem.mm_node = NULL;
534 placement.num_placement = 1;
535 placement.placement = &placements;
536 placement.num_busy_placement = 1;
537 placement.busy_placement = &placements;
538 placements.fpfn = 0;
539 placements.lpfn = 0;
540 placements.mem_type = TTM_PL_TT;
541 placements.flags = TTM_PL_MASK_CACHING;
542 r = ttm_bo_mem_space(bo, &placement, &tmp_mem, ctx);
543 if (unlikely(r)) {
544 pr_err("Failed to find GTT space for blit from VRAM\n");
545 return r;
546 }
547
548 /* set caching flags */
549 r = ttm_tt_set_placement_caching(bo->ttm, tmp_mem.placement);
550 if (unlikely(r)) {
551 goto out_cleanup;
552 }
553
554 r = ttm_tt_populate(bo->bdev, bo->ttm, ctx);
555 if (unlikely(r))
556 goto out_cleanup;
557
558 /* Bind the memory to the GTT space */
559 r = amdgpu_ttm_backend_bind(bo->bdev, bo->ttm, &tmp_mem);
560 if (unlikely(r)) {
561 goto out_cleanup;
562 }
563
564 /* blit VRAM to GTT */
565 r = amdgpu_move_blit(bo, evict, &tmp_mem, old_mem);
566 if (unlikely(r)) {
567 goto out_cleanup;
568 }
569
570 /* move BO (in tmp_mem) to new_mem */
571 r = ttm_bo_move_ttm(bo, ctx, new_mem);
572 out_cleanup:
573 ttm_resource_free(bo, &tmp_mem);
574 return r;
575 }
576
577 /**
578 * amdgpu_move_ram_vram - Copy buffer from RAM to VRAM
579 *
580 * Called by amdgpu_bo_move().
581 */
amdgpu_move_ram_vram(struct ttm_buffer_object * bo,bool evict,struct ttm_operation_ctx * ctx,struct ttm_resource * new_mem)582 static int amdgpu_move_ram_vram(struct ttm_buffer_object *bo, bool evict,
583 struct ttm_operation_ctx *ctx,
584 struct ttm_resource *new_mem)
585 {
586 struct ttm_resource *old_mem = &bo->mem;
587 struct ttm_resource tmp_mem;
588 struct ttm_placement placement;
589 struct ttm_place placements;
590 int r;
591
592 /* make space in GTT for old_mem buffer */
593 tmp_mem = *new_mem;
594 tmp_mem.mm_node = NULL;
595 placement.num_placement = 1;
596 placement.placement = &placements;
597 placement.num_busy_placement = 1;
598 placement.busy_placement = &placements;
599 placements.fpfn = 0;
600 placements.lpfn = 0;
601 placements.mem_type = TTM_PL_TT;
602 placements.flags = TTM_PL_MASK_CACHING;
603 r = ttm_bo_mem_space(bo, &placement, &tmp_mem, ctx);
604 if (unlikely(r)) {
605 pr_err("Failed to find GTT space for blit to VRAM\n");
606 return r;
607 }
608
609 /* move/bind old memory to GTT space */
610 r = ttm_bo_move_ttm(bo, ctx, &tmp_mem);
611 if (unlikely(r)) {
612 goto out_cleanup;
613 }
614
615 /* copy to VRAM */
616 r = amdgpu_move_blit(bo, evict, new_mem, old_mem);
617 if (unlikely(r)) {
618 goto out_cleanup;
619 }
620 out_cleanup:
621 ttm_resource_free(bo, &tmp_mem);
622 return r;
623 }
624
625 /**
626 * amdgpu_mem_visible - Check that memory can be accessed by ttm_bo_move_memcpy
627 *
628 * Called by amdgpu_bo_move()
629 */
amdgpu_mem_visible(struct amdgpu_device * adev,struct ttm_resource * mem)630 static bool amdgpu_mem_visible(struct amdgpu_device *adev,
631 struct ttm_resource *mem)
632 {
633 struct drm_mm_node *nodes = mem->mm_node;
634
635 if (mem->mem_type == TTM_PL_SYSTEM ||
636 mem->mem_type == TTM_PL_TT)
637 return true;
638 if (mem->mem_type != TTM_PL_VRAM)
639 return false;
640
641 /* ttm_resource_ioremap only supports contiguous memory */
642 if (nodes->size != mem->num_pages)
643 return false;
644
645 return ((nodes->start + nodes->size) << PAGE_SHIFT)
646 <= adev->gmc.visible_vram_size;
647 }
648
649 /**
650 * amdgpu_bo_move - Move a buffer object to a new memory location
651 *
652 * Called by ttm_bo_handle_move_mem()
653 */
amdgpu_bo_move(struct ttm_buffer_object * bo,bool evict,struct ttm_operation_ctx * ctx,struct ttm_resource * new_mem)654 static int amdgpu_bo_move(struct ttm_buffer_object *bo, bool evict,
655 struct ttm_operation_ctx *ctx,
656 struct ttm_resource *new_mem)
657 {
658 struct amdgpu_device *adev;
659 struct amdgpu_bo *abo;
660 struct ttm_resource *old_mem = &bo->mem;
661 int r;
662
663 /* Can't move a pinned BO */
664 abo = ttm_to_amdgpu_bo(bo);
665 if (WARN_ON_ONCE(abo->pin_count > 0))
666 return -EINVAL;
667
668 adev = amdgpu_ttm_adev(bo->bdev);
669
670 if (old_mem->mem_type == TTM_PL_SYSTEM && bo->ttm == NULL) {
671 ttm_bo_move_null(bo, new_mem);
672 return 0;
673 }
674 if ((old_mem->mem_type == TTM_PL_TT &&
675 new_mem->mem_type == TTM_PL_SYSTEM) ||
676 (old_mem->mem_type == TTM_PL_SYSTEM &&
677 new_mem->mem_type == TTM_PL_TT)) {
678 /* bind is enough */
679 ttm_bo_move_null(bo, new_mem);
680 return 0;
681 }
682 if (old_mem->mem_type == AMDGPU_PL_GDS ||
683 old_mem->mem_type == AMDGPU_PL_GWS ||
684 old_mem->mem_type == AMDGPU_PL_OA ||
685 new_mem->mem_type == AMDGPU_PL_GDS ||
686 new_mem->mem_type == AMDGPU_PL_GWS ||
687 new_mem->mem_type == AMDGPU_PL_OA) {
688 /* Nothing to save here */
689 ttm_bo_move_null(bo, new_mem);
690 return 0;
691 }
692
693 if (!adev->mman.buffer_funcs_enabled) {
694 r = -ENODEV;
695 goto memcpy;
696 }
697
698 if (old_mem->mem_type == TTM_PL_VRAM &&
699 new_mem->mem_type == TTM_PL_SYSTEM) {
700 r = amdgpu_move_vram_ram(bo, evict, ctx, new_mem);
701 } else if (old_mem->mem_type == TTM_PL_SYSTEM &&
702 new_mem->mem_type == TTM_PL_VRAM) {
703 r = amdgpu_move_ram_vram(bo, evict, ctx, new_mem);
704 } else {
705 r = amdgpu_move_blit(bo, evict,
706 new_mem, old_mem);
707 }
708
709 if (r) {
710 memcpy:
711 /* Check that all memory is CPU accessible */
712 if (!amdgpu_mem_visible(adev, old_mem) ||
713 !amdgpu_mem_visible(adev, new_mem)) {
714 pr_err("Move buffer fallback to memcpy unavailable\n");
715 return r;
716 }
717
718 r = ttm_bo_move_memcpy(bo, ctx, new_mem);
719 if (r)
720 return r;
721 }
722
723 if (bo->type == ttm_bo_type_device &&
724 new_mem->mem_type == TTM_PL_VRAM &&
725 old_mem->mem_type != TTM_PL_VRAM) {
726 /* amdgpu_bo_fault_reserve_notify will re-set this if the CPU
727 * accesses the BO after it's moved.
728 */
729 abo->flags &= ~AMDGPU_GEM_CREATE_CPU_ACCESS_REQUIRED;
730 }
731
732 /* update statistics */
733 atomic64_add((u64)bo->num_pages << PAGE_SHIFT, &adev->num_bytes_moved);
734 return 0;
735 }
736
737 /**
738 * amdgpu_ttm_io_mem_reserve - Reserve a block of memory during a fault
739 *
740 * Called by ttm_mem_io_reserve() ultimately via ttm_bo_vm_fault()
741 */
amdgpu_ttm_io_mem_reserve(struct ttm_bo_device * bdev,struct ttm_resource * mem)742 static int amdgpu_ttm_io_mem_reserve(struct ttm_bo_device *bdev, struct ttm_resource *mem)
743 {
744 struct amdgpu_device *adev = amdgpu_ttm_adev(bdev);
745 struct drm_mm_node *mm_node = mem->mm_node;
746 size_t bus_size = (size_t)mem->num_pages << PAGE_SHIFT;
747
748 switch (mem->mem_type) {
749 case TTM_PL_SYSTEM:
750 /* system memory */
751 return 0;
752 case TTM_PL_TT:
753 break;
754 case TTM_PL_VRAM:
755 mem->bus.offset = mem->start << PAGE_SHIFT;
756 /* check if it's visible */
757 if ((mem->bus.offset + bus_size) > adev->gmc.visible_vram_size)
758 return -EINVAL;
759 /* Only physically contiguous buffers apply. In a contiguous
760 * buffer, size of the first mm_node would match the number of
761 * pages in ttm_resource.
762 */
763 if (adev->mman.aper_base_kaddr &&
764 (mm_node->size == mem->num_pages))
765 mem->bus.addr = (u8 *)adev->mman.aper_base_kaddr +
766 mem->bus.offset;
767
768 mem->bus.offset += adev->gmc.aper_base;
769 mem->bus.is_iomem = true;
770 break;
771 default:
772 return -EINVAL;
773 }
774 return 0;
775 }
776
amdgpu_ttm_io_mem_pfn(struct ttm_buffer_object * bo,unsigned long page_offset)777 static unsigned long amdgpu_ttm_io_mem_pfn(struct ttm_buffer_object *bo,
778 unsigned long page_offset)
779 {
780 struct amdgpu_device *adev = amdgpu_ttm_adev(bo->bdev);
781 uint64_t offset = (page_offset << PAGE_SHIFT);
782 struct drm_mm_node *mm;
783
784 mm = amdgpu_find_mm_node(&bo->mem, &offset);
785 offset += adev->gmc.aper_base;
786 return mm->start + (offset >> PAGE_SHIFT);
787 }
788
789 /**
790 * amdgpu_ttm_domain_start - Returns GPU start address
791 * @adev: amdgpu device object
792 * @type: type of the memory
793 *
794 * Returns:
795 * GPU start address of a memory domain
796 */
797
amdgpu_ttm_domain_start(struct amdgpu_device * adev,uint32_t type)798 uint64_t amdgpu_ttm_domain_start(struct amdgpu_device *adev, uint32_t type)
799 {
800 switch (type) {
801 case TTM_PL_TT:
802 return adev->gmc.gart_start;
803 case TTM_PL_VRAM:
804 return adev->gmc.vram_start;
805 }
806
807 return 0;
808 }
809
810 /*
811 * TTM backend functions.
812 */
813 struct amdgpu_ttm_tt {
814 struct ttm_dma_tt ttm;
815 struct drm_gem_object *gobj;
816 u64 offset;
817 uint64_t userptr;
818 struct task_struct *usertask;
819 uint32_t userflags;
820 bool bound;
821 #if IS_ENABLED(CONFIG_DRM_AMDGPU_USERPTR)
822 struct hmm_range *range;
823 #endif
824 };
825
826 #ifdef CONFIG_DRM_AMDGPU_USERPTR
827 /**
828 * amdgpu_ttm_tt_get_user_pages - get device accessible pages that back user
829 * memory and start HMM tracking CPU page table update
830 *
831 * Calling function must call amdgpu_ttm_tt_userptr_range_done() once and only
832 * once afterwards to stop HMM tracking
833 */
amdgpu_ttm_tt_get_user_pages(struct amdgpu_bo * bo,struct page ** pages)834 int amdgpu_ttm_tt_get_user_pages(struct amdgpu_bo *bo, struct page **pages)
835 {
836 struct ttm_tt *ttm = bo->tbo.ttm;
837 struct amdgpu_ttm_tt *gtt = (void *)ttm;
838 unsigned long start = gtt->userptr;
839 struct vm_area_struct *vma;
840 struct hmm_range *range;
841 unsigned long timeout;
842 struct mm_struct *mm;
843 unsigned long i;
844 int r = 0;
845
846 mm = bo->notifier.mm;
847 if (unlikely(!mm)) {
848 DRM_DEBUG_DRIVER("BO is not registered?\n");
849 return -EFAULT;
850 }
851
852 /* Another get_user_pages is running at the same time?? */
853 if (WARN_ON(gtt->range))
854 return -EFAULT;
855
856 if (!mmget_not_zero(mm)) /* Happens during process shutdown */
857 return -ESRCH;
858
859 range = kzalloc(sizeof(*range), GFP_KERNEL);
860 if (unlikely(!range)) {
861 r = -ENOMEM;
862 goto out;
863 }
864 range->notifier = &bo->notifier;
865 range->start = bo->notifier.interval_tree.start;
866 range->end = bo->notifier.interval_tree.last + 1;
867 range->default_flags = HMM_PFN_REQ_FAULT;
868 if (!amdgpu_ttm_tt_is_readonly(ttm))
869 range->default_flags |= HMM_PFN_REQ_WRITE;
870
871 range->hmm_pfns = kvmalloc_array(ttm->num_pages,
872 sizeof(*range->hmm_pfns), GFP_KERNEL);
873 if (unlikely(!range->hmm_pfns)) {
874 r = -ENOMEM;
875 goto out_free_ranges;
876 }
877
878 mmap_read_lock(mm);
879 vma = find_vma(mm, start);
880 if (unlikely(!vma || start < vma->vm_start)) {
881 r = -EFAULT;
882 goto out_unlock;
883 }
884 if (unlikely((gtt->userflags & AMDGPU_GEM_USERPTR_ANONONLY) &&
885 vma->vm_file)) {
886 r = -EPERM;
887 goto out_unlock;
888 }
889 mmap_read_unlock(mm);
890 timeout = jiffies + msecs_to_jiffies(HMM_RANGE_DEFAULT_TIMEOUT);
891
892 retry:
893 range->notifier_seq = mmu_interval_read_begin(&bo->notifier);
894
895 mmap_read_lock(mm);
896 r = hmm_range_fault(range);
897 mmap_read_unlock(mm);
898 if (unlikely(r)) {
899 /*
900 * FIXME: This timeout should encompass the retry from
901 * mmu_interval_read_retry() as well.
902 */
903 if (r == -EBUSY && !time_after(jiffies, timeout))
904 goto retry;
905 goto out_free_pfns;
906 }
907
908 /*
909 * Due to default_flags, all pages are HMM_PFN_VALID or
910 * hmm_range_fault() fails. FIXME: The pages cannot be touched outside
911 * the notifier_lock, and mmu_interval_read_retry() must be done first.
912 */
913 for (i = 0; i < ttm->num_pages; i++)
914 pages[i] = hmm_pfn_to_page(range->hmm_pfns[i]);
915
916 gtt->range = range;
917 mmput(mm);
918
919 return 0;
920
921 out_unlock:
922 mmap_read_unlock(mm);
923 out_free_pfns:
924 kvfree(range->hmm_pfns);
925 out_free_ranges:
926 kfree(range);
927 out:
928 mmput(mm);
929 return r;
930 }
931
932 /**
933 * amdgpu_ttm_tt_userptr_range_done - stop HMM track the CPU page table change
934 * Check if the pages backing this ttm range have been invalidated
935 *
936 * Returns: true if pages are still valid
937 */
amdgpu_ttm_tt_get_user_pages_done(struct ttm_tt * ttm)938 bool amdgpu_ttm_tt_get_user_pages_done(struct ttm_tt *ttm)
939 {
940 struct amdgpu_ttm_tt *gtt = (void *)ttm;
941 bool r = false;
942
943 if (!gtt || !gtt->userptr)
944 return false;
945
946 DRM_DEBUG_DRIVER("user_pages_done 0x%llx pages 0x%lx\n",
947 gtt->userptr, ttm->num_pages);
948
949 WARN_ONCE(!gtt->range || !gtt->range->hmm_pfns,
950 "No user pages to check\n");
951
952 if (gtt->range) {
953 /*
954 * FIXME: Must always hold notifier_lock for this, and must
955 * not ignore the return code.
956 */
957 r = mmu_interval_read_retry(gtt->range->notifier,
958 gtt->range->notifier_seq);
959 kvfree(gtt->range->hmm_pfns);
960 kfree(gtt->range);
961 gtt->range = NULL;
962 }
963
964 return !r;
965 }
966 #endif
967
968 /**
969 * amdgpu_ttm_tt_set_user_pages - Copy pages in, putting old pages as necessary.
970 *
971 * Called by amdgpu_cs_list_validate(). This creates the page list
972 * that backs user memory and will ultimately be mapped into the device
973 * address space.
974 */
amdgpu_ttm_tt_set_user_pages(struct ttm_tt * ttm,struct page ** pages)975 void amdgpu_ttm_tt_set_user_pages(struct ttm_tt *ttm, struct page **pages)
976 {
977 unsigned long i;
978
979 for (i = 0; i < ttm->num_pages; ++i)
980 ttm->pages[i] = pages ? pages[i] : NULL;
981 }
982
983 /**
984 * amdgpu_ttm_tt_pin_userptr - prepare the sg table with the user pages
985 *
986 * Called by amdgpu_ttm_backend_bind()
987 **/
amdgpu_ttm_tt_pin_userptr(struct ttm_bo_device * bdev,struct ttm_tt * ttm)988 static int amdgpu_ttm_tt_pin_userptr(struct ttm_bo_device *bdev,
989 struct ttm_tt *ttm)
990 {
991 struct amdgpu_device *adev = amdgpu_ttm_adev(bdev);
992 struct amdgpu_ttm_tt *gtt = (void *)ttm;
993 int r;
994
995 int write = !(gtt->userflags & AMDGPU_GEM_USERPTR_READONLY);
996 enum dma_data_direction direction = write ?
997 DMA_BIDIRECTIONAL : DMA_TO_DEVICE;
998
999 /* Allocate an SG array and squash pages into it */
1000 r = sg_alloc_table_from_pages(ttm->sg, ttm->pages, ttm->num_pages, 0,
1001 ttm->num_pages << PAGE_SHIFT,
1002 GFP_KERNEL);
1003 if (r)
1004 goto release_sg;
1005
1006 /* Map SG to device */
1007 r = dma_map_sgtable(adev->dev, ttm->sg, direction, 0);
1008 if (r)
1009 goto release_sg;
1010
1011 /* convert SG to linear array of pages and dma addresses */
1012 drm_prime_sg_to_page_addr_arrays(ttm->sg, ttm->pages,
1013 gtt->ttm.dma_address, ttm->num_pages);
1014
1015 return 0;
1016
1017 release_sg:
1018 kfree(ttm->sg);
1019 ttm->sg = NULL;
1020 return r;
1021 }
1022
1023 /**
1024 * amdgpu_ttm_tt_unpin_userptr - Unpin and unmap userptr pages
1025 */
amdgpu_ttm_tt_unpin_userptr(struct ttm_bo_device * bdev,struct ttm_tt * ttm)1026 static void amdgpu_ttm_tt_unpin_userptr(struct ttm_bo_device *bdev,
1027 struct ttm_tt *ttm)
1028 {
1029 struct amdgpu_device *adev = amdgpu_ttm_adev(bdev);
1030 struct amdgpu_ttm_tt *gtt = (void *)ttm;
1031
1032 int write = !(gtt->userflags & AMDGPU_GEM_USERPTR_READONLY);
1033 enum dma_data_direction direction = write ?
1034 DMA_BIDIRECTIONAL : DMA_TO_DEVICE;
1035
1036 /* double check that we don't free the table twice */
1037 if (!ttm->sg || !ttm->sg->sgl)
1038 return;
1039
1040 /* unmap the pages mapped to the device */
1041 dma_unmap_sgtable(adev->dev, ttm->sg, direction, 0);
1042 sg_free_table(ttm->sg);
1043
1044 #if IS_ENABLED(CONFIG_DRM_AMDGPU_USERPTR)
1045 if (gtt->range) {
1046 unsigned long i;
1047
1048 for (i = 0; i < ttm->num_pages; i++) {
1049 if (ttm->pages[i] !=
1050 hmm_pfn_to_page(gtt->range->hmm_pfns[i]))
1051 break;
1052 }
1053
1054 WARN((i == ttm->num_pages), "Missing get_user_page_done\n");
1055 }
1056 #endif
1057 }
1058
amdgpu_ttm_gart_bind(struct amdgpu_device * adev,struct ttm_buffer_object * tbo,uint64_t flags)1059 static int amdgpu_ttm_gart_bind(struct amdgpu_device *adev,
1060 struct ttm_buffer_object *tbo,
1061 uint64_t flags)
1062 {
1063 struct amdgpu_bo *abo = ttm_to_amdgpu_bo(tbo);
1064 struct ttm_tt *ttm = tbo->ttm;
1065 struct amdgpu_ttm_tt *gtt = (void *)ttm;
1066 int r;
1067
1068 if (amdgpu_bo_encrypted(abo))
1069 flags |= AMDGPU_PTE_TMZ;
1070
1071 if (abo->flags & AMDGPU_GEM_CREATE_CP_MQD_GFX9) {
1072 uint64_t page_idx = 1;
1073
1074 r = amdgpu_gart_bind(adev, gtt->offset, page_idx,
1075 ttm->pages, gtt->ttm.dma_address, flags);
1076 if (r)
1077 goto gart_bind_fail;
1078
1079 /* The memory type of the first page defaults to UC. Now
1080 * modify the memory type to NC from the second page of
1081 * the BO onward.
1082 */
1083 flags &= ~AMDGPU_PTE_MTYPE_VG10_MASK;
1084 flags |= AMDGPU_PTE_MTYPE_VG10(AMDGPU_MTYPE_NC);
1085
1086 r = amdgpu_gart_bind(adev,
1087 gtt->offset + (page_idx << PAGE_SHIFT),
1088 ttm->num_pages - page_idx,
1089 &ttm->pages[page_idx],
1090 &(gtt->ttm.dma_address[page_idx]), flags);
1091 } else {
1092 r = amdgpu_gart_bind(adev, gtt->offset, ttm->num_pages,
1093 ttm->pages, gtt->ttm.dma_address, flags);
1094 }
1095
1096 gart_bind_fail:
1097 if (r)
1098 DRM_ERROR("failed to bind %lu pages at 0x%08llX\n",
1099 ttm->num_pages, gtt->offset);
1100
1101 return r;
1102 }
1103
1104 /**
1105 * amdgpu_ttm_backend_bind - Bind GTT memory
1106 *
1107 * Called by ttm_tt_bind() on behalf of ttm_bo_handle_move_mem().
1108 * This handles binding GTT memory to the device address space.
1109 */
amdgpu_ttm_backend_bind(struct ttm_bo_device * bdev,struct ttm_tt * ttm,struct ttm_resource * bo_mem)1110 static int amdgpu_ttm_backend_bind(struct ttm_bo_device *bdev,
1111 struct ttm_tt *ttm,
1112 struct ttm_resource *bo_mem)
1113 {
1114 struct amdgpu_device *adev = amdgpu_ttm_adev(bdev);
1115 struct amdgpu_ttm_tt *gtt = (void*)ttm;
1116 uint64_t flags;
1117 int r = 0;
1118
1119 if (!bo_mem)
1120 return -EINVAL;
1121
1122 if (gtt->bound)
1123 return 0;
1124
1125 if (gtt->userptr) {
1126 r = amdgpu_ttm_tt_pin_userptr(bdev, ttm);
1127 if (r) {
1128 DRM_ERROR("failed to pin userptr\n");
1129 return r;
1130 }
1131 }
1132 if (!ttm->num_pages) {
1133 WARN(1, "nothing to bind %lu pages for mreg %p back %p!\n",
1134 ttm->num_pages, bo_mem, ttm);
1135 }
1136
1137 if (bo_mem->mem_type == AMDGPU_PL_GDS ||
1138 bo_mem->mem_type == AMDGPU_PL_GWS ||
1139 bo_mem->mem_type == AMDGPU_PL_OA)
1140 return -EINVAL;
1141
1142 if (!amdgpu_gtt_mgr_has_gart_addr(bo_mem)) {
1143 gtt->offset = AMDGPU_BO_INVALID_OFFSET;
1144 return 0;
1145 }
1146
1147 /* compute PTE flags relevant to this BO memory */
1148 flags = amdgpu_ttm_tt_pte_flags(adev, ttm, bo_mem);
1149
1150 /* bind pages into GART page tables */
1151 gtt->offset = (u64)bo_mem->start << PAGE_SHIFT;
1152 r = amdgpu_gart_bind(adev, gtt->offset, ttm->num_pages,
1153 ttm->pages, gtt->ttm.dma_address, flags);
1154
1155 if (r)
1156 DRM_ERROR("failed to bind %lu pages at 0x%08llX\n",
1157 ttm->num_pages, gtt->offset);
1158 gtt->bound = true;
1159 return r;
1160 }
1161
1162 /**
1163 * amdgpu_ttm_alloc_gart - Make sure buffer object is accessible either
1164 * through AGP or GART aperture.
1165 *
1166 * If bo is accessible through AGP aperture, then use AGP aperture
1167 * to access bo; otherwise allocate logical space in GART aperture
1168 * and map bo to GART aperture.
1169 */
amdgpu_ttm_alloc_gart(struct ttm_buffer_object * bo)1170 int amdgpu_ttm_alloc_gart(struct ttm_buffer_object *bo)
1171 {
1172 struct amdgpu_device *adev = amdgpu_ttm_adev(bo->bdev);
1173 struct ttm_operation_ctx ctx = { false, false };
1174 struct amdgpu_ttm_tt *gtt = (void*)bo->ttm;
1175 struct ttm_resource tmp;
1176 struct ttm_placement placement;
1177 struct ttm_place placements;
1178 uint64_t addr, flags;
1179 int r;
1180
1181 if (bo->mem.start != AMDGPU_BO_INVALID_OFFSET)
1182 return 0;
1183
1184 addr = amdgpu_gmc_agp_addr(bo);
1185 if (addr != AMDGPU_BO_INVALID_OFFSET) {
1186 bo->mem.start = addr >> PAGE_SHIFT;
1187 } else {
1188
1189 /* allocate GART space */
1190 tmp = bo->mem;
1191 tmp.mm_node = NULL;
1192 placement.num_placement = 1;
1193 placement.placement = &placements;
1194 placement.num_busy_placement = 1;
1195 placement.busy_placement = &placements;
1196 placements.fpfn = 0;
1197 placements.lpfn = adev->gmc.gart_size >> PAGE_SHIFT;
1198 placements.mem_type = TTM_PL_TT;
1199 placements.flags = bo->mem.placement;
1200
1201 r = ttm_bo_mem_space(bo, &placement, &tmp, &ctx);
1202 if (unlikely(r))
1203 return r;
1204
1205 /* compute PTE flags for this buffer object */
1206 flags = amdgpu_ttm_tt_pte_flags(adev, bo->ttm, &tmp);
1207
1208 /* Bind pages */
1209 gtt->offset = (u64)tmp.start << PAGE_SHIFT;
1210 r = amdgpu_ttm_gart_bind(adev, bo, flags);
1211 if (unlikely(r)) {
1212 ttm_resource_free(bo, &tmp);
1213 return r;
1214 }
1215
1216 ttm_resource_free(bo, &bo->mem);
1217 bo->mem = tmp;
1218 }
1219
1220 return 0;
1221 }
1222
1223 /**
1224 * amdgpu_ttm_recover_gart - Rebind GTT pages
1225 *
1226 * Called by amdgpu_gtt_mgr_recover() from amdgpu_device_reset() to
1227 * rebind GTT pages during a GPU reset.
1228 */
amdgpu_ttm_recover_gart(struct ttm_buffer_object * tbo)1229 int amdgpu_ttm_recover_gart(struct ttm_buffer_object *tbo)
1230 {
1231 struct amdgpu_device *adev = amdgpu_ttm_adev(tbo->bdev);
1232 uint64_t flags;
1233 int r;
1234
1235 if (!tbo->ttm)
1236 return 0;
1237
1238 flags = amdgpu_ttm_tt_pte_flags(adev, tbo->ttm, &tbo->mem);
1239 r = amdgpu_ttm_gart_bind(adev, tbo, flags);
1240
1241 return r;
1242 }
1243
1244 /**
1245 * amdgpu_ttm_backend_unbind - Unbind GTT mapped pages
1246 *
1247 * Called by ttm_tt_unbind() on behalf of ttm_bo_move_ttm() and
1248 * ttm_tt_destroy().
1249 */
amdgpu_ttm_backend_unbind(struct ttm_bo_device * bdev,struct ttm_tt * ttm)1250 static void amdgpu_ttm_backend_unbind(struct ttm_bo_device *bdev,
1251 struct ttm_tt *ttm)
1252 {
1253 struct amdgpu_device *adev = amdgpu_ttm_adev(bdev);
1254 struct amdgpu_ttm_tt *gtt = (void *)ttm;
1255 int r;
1256
1257 /* if the pages have userptr pinning then clear that first */
1258 if (gtt->userptr)
1259 amdgpu_ttm_tt_unpin_userptr(bdev, ttm);
1260
1261 if (!gtt->bound)
1262 return;
1263
1264 if (gtt->offset == AMDGPU_BO_INVALID_OFFSET)
1265 return;
1266
1267 /* unbind shouldn't be done for GDS/GWS/OA in ttm_bo_clean_mm */
1268 r = amdgpu_gart_unbind(adev, gtt->offset, ttm->num_pages);
1269 if (r)
1270 DRM_ERROR("failed to unbind %lu pages at 0x%08llX\n",
1271 gtt->ttm.ttm.num_pages, gtt->offset);
1272 gtt->bound = false;
1273 }
1274
amdgpu_ttm_backend_destroy(struct ttm_bo_device * bdev,struct ttm_tt * ttm)1275 static void amdgpu_ttm_backend_destroy(struct ttm_bo_device *bdev,
1276 struct ttm_tt *ttm)
1277 {
1278 struct amdgpu_ttm_tt *gtt = (void *)ttm;
1279
1280 amdgpu_ttm_backend_unbind(bdev, ttm);
1281 ttm_tt_destroy_common(bdev, ttm);
1282 if (gtt->usertask)
1283 put_task_struct(gtt->usertask);
1284
1285 ttm_dma_tt_fini(>t->ttm);
1286 kfree(gtt);
1287 }
1288
1289 /**
1290 * amdgpu_ttm_tt_create - Create a ttm_tt object for a given BO
1291 *
1292 * @bo: The buffer object to create a GTT ttm_tt object around
1293 *
1294 * Called by ttm_tt_create().
1295 */
amdgpu_ttm_tt_create(struct ttm_buffer_object * bo,uint32_t page_flags)1296 static struct ttm_tt *amdgpu_ttm_tt_create(struct ttm_buffer_object *bo,
1297 uint32_t page_flags)
1298 {
1299 struct amdgpu_ttm_tt *gtt;
1300
1301 gtt = kzalloc(sizeof(struct amdgpu_ttm_tt), GFP_KERNEL);
1302 if (gtt == NULL) {
1303 return NULL;
1304 }
1305 gtt->gobj = &bo->base;
1306
1307 /* allocate space for the uninitialized page entries */
1308 if (ttm_sg_tt_init(>t->ttm, bo, page_flags)) {
1309 kfree(gtt);
1310 return NULL;
1311 }
1312 return >t->ttm.ttm;
1313 }
1314
1315 /**
1316 * amdgpu_ttm_tt_populate - Map GTT pages visible to the device
1317 *
1318 * Map the pages of a ttm_tt object to an address space visible
1319 * to the underlying device.
1320 */
amdgpu_ttm_tt_populate(struct ttm_bo_device * bdev,struct ttm_tt * ttm,struct ttm_operation_ctx * ctx)1321 static int amdgpu_ttm_tt_populate(struct ttm_bo_device *bdev,
1322 struct ttm_tt *ttm,
1323 struct ttm_operation_ctx *ctx)
1324 {
1325 struct amdgpu_device *adev = amdgpu_ttm_adev(bdev);
1326 struct amdgpu_ttm_tt *gtt = (void *)ttm;
1327
1328 /* user pages are bound by amdgpu_ttm_tt_pin_userptr() */
1329 if (gtt && gtt->userptr) {
1330 ttm->sg = kzalloc(sizeof(struct sg_table), GFP_KERNEL);
1331 if (!ttm->sg)
1332 return -ENOMEM;
1333
1334 ttm->page_flags |= TTM_PAGE_FLAG_SG;
1335 ttm_tt_set_populated(ttm);
1336 return 0;
1337 }
1338
1339 if (ttm->page_flags & TTM_PAGE_FLAG_SG) {
1340 if (!ttm->sg) {
1341 struct dma_buf_attachment *attach;
1342 struct sg_table *sgt;
1343
1344 attach = gtt->gobj->import_attach;
1345 sgt = dma_buf_map_attachment(attach, DMA_BIDIRECTIONAL);
1346 if (IS_ERR(sgt))
1347 return PTR_ERR(sgt);
1348
1349 ttm->sg = sgt;
1350 }
1351
1352 drm_prime_sg_to_page_addr_arrays(ttm->sg, ttm->pages,
1353 gtt->ttm.dma_address,
1354 ttm->num_pages);
1355 ttm_tt_set_populated(ttm);
1356 return 0;
1357 }
1358
1359 #ifdef CONFIG_SWIOTLB
1360 if (adev->need_swiotlb && swiotlb_nr_tbl()) {
1361 return ttm_dma_populate(>t->ttm, adev->dev, ctx);
1362 }
1363 #endif
1364
1365 /* fall back to generic helper to populate the page array
1366 * and map them to the device */
1367 return ttm_populate_and_map_pages(adev->dev, >t->ttm, ctx);
1368 }
1369
1370 /**
1371 * amdgpu_ttm_tt_unpopulate - unmap GTT pages and unpopulate page arrays
1372 *
1373 * Unmaps pages of a ttm_tt object from the device address space and
1374 * unpopulates the page array backing it.
1375 */
amdgpu_ttm_tt_unpopulate(struct ttm_bo_device * bdev,struct ttm_tt * ttm)1376 static void amdgpu_ttm_tt_unpopulate(struct ttm_bo_device *bdev, struct ttm_tt *ttm)
1377 {
1378 struct amdgpu_ttm_tt *gtt = (void *)ttm;
1379 struct amdgpu_device *adev;
1380
1381 if (gtt && gtt->userptr) {
1382 amdgpu_ttm_tt_set_user_pages(ttm, NULL);
1383 kfree(ttm->sg);
1384 ttm->sg = NULL;
1385 ttm->page_flags &= ~TTM_PAGE_FLAG_SG;
1386 return;
1387 }
1388
1389 if (ttm->sg && gtt->gobj->import_attach) {
1390 struct dma_buf_attachment *attach;
1391
1392 attach = gtt->gobj->import_attach;
1393 dma_buf_unmap_attachment(attach, ttm->sg, DMA_BIDIRECTIONAL);
1394 ttm->sg = NULL;
1395 return;
1396 }
1397
1398 if (ttm->page_flags & TTM_PAGE_FLAG_SG)
1399 return;
1400
1401 adev = amdgpu_ttm_adev(bdev);
1402
1403 #ifdef CONFIG_SWIOTLB
1404 if (adev->need_swiotlb && swiotlb_nr_tbl()) {
1405 ttm_dma_unpopulate(>t->ttm, adev->dev);
1406 return;
1407 }
1408 #endif
1409
1410 /* fall back to generic helper to unmap and unpopulate array */
1411 ttm_unmap_and_unpopulate_pages(adev->dev, >t->ttm);
1412 }
1413
1414 /**
1415 * amdgpu_ttm_tt_set_userptr - Initialize userptr GTT ttm_tt for the current
1416 * task
1417 *
1418 * @bo: The ttm_buffer_object to bind this userptr to
1419 * @addr: The address in the current tasks VM space to use
1420 * @flags: Requirements of userptr object.
1421 *
1422 * Called by amdgpu_gem_userptr_ioctl() to bind userptr pages
1423 * to current task
1424 */
amdgpu_ttm_tt_set_userptr(struct ttm_buffer_object * bo,uint64_t addr,uint32_t flags)1425 int amdgpu_ttm_tt_set_userptr(struct ttm_buffer_object *bo,
1426 uint64_t addr, uint32_t flags)
1427 {
1428 struct amdgpu_ttm_tt *gtt;
1429
1430 if (!bo->ttm) {
1431 /* TODO: We want a separate TTM object type for userptrs */
1432 bo->ttm = amdgpu_ttm_tt_create(bo, 0);
1433 if (bo->ttm == NULL)
1434 return -ENOMEM;
1435 }
1436
1437 gtt = (void*)bo->ttm;
1438 gtt->userptr = addr;
1439 gtt->userflags = flags;
1440
1441 if (gtt->usertask)
1442 put_task_struct(gtt->usertask);
1443 gtt->usertask = current->group_leader;
1444 get_task_struct(gtt->usertask);
1445
1446 return 0;
1447 }
1448
1449 /**
1450 * amdgpu_ttm_tt_get_usermm - Return memory manager for ttm_tt object
1451 */
amdgpu_ttm_tt_get_usermm(struct ttm_tt * ttm)1452 struct mm_struct *amdgpu_ttm_tt_get_usermm(struct ttm_tt *ttm)
1453 {
1454 struct amdgpu_ttm_tt *gtt = (void *)ttm;
1455
1456 if (gtt == NULL)
1457 return NULL;
1458
1459 if (gtt->usertask == NULL)
1460 return NULL;
1461
1462 return gtt->usertask->mm;
1463 }
1464
1465 /**
1466 * amdgpu_ttm_tt_affect_userptr - Determine if a ttm_tt object lays inside an
1467 * address range for the current task.
1468 *
1469 */
amdgpu_ttm_tt_affect_userptr(struct ttm_tt * ttm,unsigned long start,unsigned long end)1470 bool amdgpu_ttm_tt_affect_userptr(struct ttm_tt *ttm, unsigned long start,
1471 unsigned long end)
1472 {
1473 struct amdgpu_ttm_tt *gtt = (void *)ttm;
1474 unsigned long size;
1475
1476 if (gtt == NULL || !gtt->userptr)
1477 return false;
1478
1479 /* Return false if no part of the ttm_tt object lies within
1480 * the range
1481 */
1482 size = (unsigned long)gtt->ttm.ttm.num_pages * PAGE_SIZE;
1483 if (gtt->userptr > end || gtt->userptr + size <= start)
1484 return false;
1485
1486 return true;
1487 }
1488
1489 /**
1490 * amdgpu_ttm_tt_is_userptr - Have the pages backing by userptr?
1491 */
amdgpu_ttm_tt_is_userptr(struct ttm_tt * ttm)1492 bool amdgpu_ttm_tt_is_userptr(struct ttm_tt *ttm)
1493 {
1494 struct amdgpu_ttm_tt *gtt = (void *)ttm;
1495
1496 if (gtt == NULL || !gtt->userptr)
1497 return false;
1498
1499 return true;
1500 }
1501
1502 /**
1503 * amdgpu_ttm_tt_is_readonly - Is the ttm_tt object read only?
1504 */
amdgpu_ttm_tt_is_readonly(struct ttm_tt * ttm)1505 bool amdgpu_ttm_tt_is_readonly(struct ttm_tt *ttm)
1506 {
1507 struct amdgpu_ttm_tt *gtt = (void *)ttm;
1508
1509 if (gtt == NULL)
1510 return false;
1511
1512 return !!(gtt->userflags & AMDGPU_GEM_USERPTR_READONLY);
1513 }
1514
1515 /**
1516 * amdgpu_ttm_tt_pde_flags - Compute PDE flags for ttm_tt object
1517 *
1518 * @ttm: The ttm_tt object to compute the flags for
1519 * @mem: The memory registry backing this ttm_tt object
1520 *
1521 * Figure out the flags to use for a VM PDE (Page Directory Entry).
1522 */
amdgpu_ttm_tt_pde_flags(struct ttm_tt * ttm,struct ttm_resource * mem)1523 uint64_t amdgpu_ttm_tt_pde_flags(struct ttm_tt *ttm, struct ttm_resource *mem)
1524 {
1525 uint64_t flags = 0;
1526
1527 if (mem && mem->mem_type != TTM_PL_SYSTEM)
1528 flags |= AMDGPU_PTE_VALID;
1529
1530 if (mem && mem->mem_type == TTM_PL_TT) {
1531 flags |= AMDGPU_PTE_SYSTEM;
1532
1533 if (ttm->caching_state == tt_cached)
1534 flags |= AMDGPU_PTE_SNOOPED;
1535 }
1536
1537 return flags;
1538 }
1539
1540 /**
1541 * amdgpu_ttm_tt_pte_flags - Compute PTE flags for ttm_tt object
1542 *
1543 * @ttm: The ttm_tt object to compute the flags for
1544 * @mem: The memory registry backing this ttm_tt object
1545
1546 * Figure out the flags to use for a VM PTE (Page Table Entry).
1547 */
amdgpu_ttm_tt_pte_flags(struct amdgpu_device * adev,struct ttm_tt * ttm,struct ttm_resource * mem)1548 uint64_t amdgpu_ttm_tt_pte_flags(struct amdgpu_device *adev, struct ttm_tt *ttm,
1549 struct ttm_resource *mem)
1550 {
1551 uint64_t flags = amdgpu_ttm_tt_pde_flags(ttm, mem);
1552
1553 flags |= adev->gart.gart_pte_flags;
1554 flags |= AMDGPU_PTE_READABLE;
1555
1556 if (!amdgpu_ttm_tt_is_readonly(ttm))
1557 flags |= AMDGPU_PTE_WRITEABLE;
1558
1559 return flags;
1560 }
1561
1562 /**
1563 * amdgpu_ttm_bo_eviction_valuable - Check to see if we can evict a buffer
1564 * object.
1565 *
1566 * Return true if eviction is sensible. Called by ttm_mem_evict_first() on
1567 * behalf of ttm_bo_mem_force_space() which tries to evict buffer objects until
1568 * it can find space for a new object and by ttm_bo_force_list_clean() which is
1569 * used to clean out a memory space.
1570 */
amdgpu_ttm_bo_eviction_valuable(struct ttm_buffer_object * bo,const struct ttm_place * place)1571 static bool amdgpu_ttm_bo_eviction_valuable(struct ttm_buffer_object *bo,
1572 const struct ttm_place *place)
1573 {
1574 unsigned long num_pages = bo->mem.num_pages;
1575 struct drm_mm_node *node = bo->mem.mm_node;
1576 struct dma_resv_list *flist;
1577 struct dma_fence *f;
1578 int i;
1579
1580 if (bo->type == ttm_bo_type_kernel &&
1581 !amdgpu_vm_evictable(ttm_to_amdgpu_bo(bo)))
1582 return false;
1583
1584 /* If bo is a KFD BO, check if the bo belongs to the current process.
1585 * If true, then return false as any KFD process needs all its BOs to
1586 * be resident to run successfully
1587 */
1588 flist = dma_resv_get_list(bo->base.resv);
1589 if (flist) {
1590 for (i = 0; i < flist->shared_count; ++i) {
1591 f = rcu_dereference_protected(flist->shared[i],
1592 dma_resv_held(bo->base.resv));
1593 if (amdkfd_fence_check_mm(f, current->mm))
1594 return false;
1595 }
1596 }
1597
1598 switch (bo->mem.mem_type) {
1599 case TTM_PL_TT:
1600 if (amdgpu_bo_is_amdgpu_bo(bo) &&
1601 amdgpu_bo_encrypted(ttm_to_amdgpu_bo(bo)))
1602 return false;
1603 return true;
1604
1605 case TTM_PL_VRAM:
1606 /* Check each drm MM node individually */
1607 while (num_pages) {
1608 if (place->fpfn < (node->start + node->size) &&
1609 !(place->lpfn && place->lpfn <= node->start))
1610 return true;
1611
1612 num_pages -= node->size;
1613 ++node;
1614 }
1615 return false;
1616
1617 default:
1618 break;
1619 }
1620
1621 return ttm_bo_eviction_valuable(bo, place);
1622 }
1623
1624 /**
1625 * amdgpu_ttm_access_memory - Read or Write memory that backs a buffer object.
1626 *
1627 * @bo: The buffer object to read/write
1628 * @offset: Offset into buffer object
1629 * @buf: Secondary buffer to write/read from
1630 * @len: Length in bytes of access
1631 * @write: true if writing
1632 *
1633 * This is used to access VRAM that backs a buffer object via MMIO
1634 * access for debugging purposes.
1635 */
amdgpu_ttm_access_memory(struct ttm_buffer_object * bo,unsigned long offset,void * buf,int len,int write)1636 static int amdgpu_ttm_access_memory(struct ttm_buffer_object *bo,
1637 unsigned long offset,
1638 void *buf, int len, int write)
1639 {
1640 struct amdgpu_bo *abo = ttm_to_amdgpu_bo(bo);
1641 struct amdgpu_device *adev = amdgpu_ttm_adev(abo->tbo.bdev);
1642 struct drm_mm_node *nodes;
1643 uint32_t value = 0;
1644 int ret = 0;
1645 uint64_t pos;
1646 unsigned long flags;
1647
1648 if (bo->mem.mem_type != TTM_PL_VRAM)
1649 return -EIO;
1650
1651 pos = offset;
1652 nodes = amdgpu_find_mm_node(&abo->tbo.mem, &pos);
1653 pos += (nodes->start << PAGE_SHIFT);
1654
1655 while (len && pos < adev->gmc.mc_vram_size) {
1656 uint64_t aligned_pos = pos & ~(uint64_t)3;
1657 uint64_t bytes = 4 - (pos & 3);
1658 uint32_t shift = (pos & 3) * 8;
1659 uint32_t mask = 0xffffffff << shift;
1660
1661 if (len < bytes) {
1662 mask &= 0xffffffff >> (bytes - len) * 8;
1663 bytes = len;
1664 }
1665
1666 if (mask != 0xffffffff) {
1667 spin_lock_irqsave(&adev->mmio_idx_lock, flags);
1668 WREG32_NO_KIQ(mmMM_INDEX, ((uint32_t)aligned_pos) | 0x80000000);
1669 WREG32_NO_KIQ(mmMM_INDEX_HI, aligned_pos >> 31);
1670 if (!write || mask != 0xffffffff)
1671 value = RREG32_NO_KIQ(mmMM_DATA);
1672 if (write) {
1673 value &= ~mask;
1674 value |= (*(uint32_t *)buf << shift) & mask;
1675 WREG32_NO_KIQ(mmMM_DATA, value);
1676 }
1677 spin_unlock_irqrestore(&adev->mmio_idx_lock, flags);
1678 if (!write) {
1679 value = (value & mask) >> shift;
1680 memcpy(buf, &value, bytes);
1681 }
1682 } else {
1683 bytes = (nodes->start + nodes->size) << PAGE_SHIFT;
1684 bytes = min(bytes - pos, (uint64_t)len & ~0x3ull);
1685
1686 amdgpu_device_vram_access(adev, pos, (uint32_t *)buf,
1687 bytes, write);
1688 }
1689
1690 ret += bytes;
1691 buf = (uint8_t *)buf + bytes;
1692 pos += bytes;
1693 len -= bytes;
1694 if (pos >= (nodes->start + nodes->size) << PAGE_SHIFT) {
1695 ++nodes;
1696 pos = (nodes->start << PAGE_SHIFT);
1697 }
1698 }
1699
1700 return ret;
1701 }
1702
1703 static struct ttm_bo_driver amdgpu_bo_driver = {
1704 .ttm_tt_create = &amdgpu_ttm_tt_create,
1705 .ttm_tt_populate = &amdgpu_ttm_tt_populate,
1706 .ttm_tt_unpopulate = &amdgpu_ttm_tt_unpopulate,
1707 .ttm_tt_bind = &amdgpu_ttm_backend_bind,
1708 .ttm_tt_unbind = &amdgpu_ttm_backend_unbind,
1709 .ttm_tt_destroy = &amdgpu_ttm_backend_destroy,
1710 .eviction_valuable = amdgpu_ttm_bo_eviction_valuable,
1711 .evict_flags = &amdgpu_evict_flags,
1712 .move = &amdgpu_bo_move,
1713 .verify_access = &amdgpu_verify_access,
1714 .move_notify = &amdgpu_bo_move_notify,
1715 .release_notify = &amdgpu_bo_release_notify,
1716 .fault_reserve_notify = &amdgpu_bo_fault_reserve_notify,
1717 .io_mem_reserve = &amdgpu_ttm_io_mem_reserve,
1718 .io_mem_pfn = amdgpu_ttm_io_mem_pfn,
1719 .access_memory = &amdgpu_ttm_access_memory,
1720 .del_from_lru_notify = &amdgpu_vm_del_from_lru_notify
1721 };
1722
1723 /*
1724 * Firmware Reservation functions
1725 */
1726 /**
1727 * amdgpu_ttm_fw_reserve_vram_fini - free fw reserved vram
1728 *
1729 * @adev: amdgpu_device pointer
1730 *
1731 * free fw reserved vram if it has been reserved.
1732 */
amdgpu_ttm_fw_reserve_vram_fini(struct amdgpu_device * adev)1733 static void amdgpu_ttm_fw_reserve_vram_fini(struct amdgpu_device *adev)
1734 {
1735 amdgpu_bo_free_kernel(&adev->mman.fw_vram_usage_reserved_bo,
1736 NULL, &adev->mman.fw_vram_usage_va);
1737 }
1738
1739 /**
1740 * amdgpu_ttm_fw_reserve_vram_init - create bo vram reservation from fw
1741 *
1742 * @adev: amdgpu_device pointer
1743 *
1744 * create bo vram reservation from fw.
1745 */
amdgpu_ttm_fw_reserve_vram_init(struct amdgpu_device * adev)1746 static int amdgpu_ttm_fw_reserve_vram_init(struct amdgpu_device *adev)
1747 {
1748 uint64_t vram_size = adev->gmc.visible_vram_size;
1749
1750 adev->mman.fw_vram_usage_va = NULL;
1751 adev->mman.fw_vram_usage_reserved_bo = NULL;
1752
1753 if (adev->mman.fw_vram_usage_size == 0 ||
1754 adev->mman.fw_vram_usage_size > vram_size)
1755 return 0;
1756
1757 return amdgpu_bo_create_kernel_at(adev,
1758 adev->mman.fw_vram_usage_start_offset,
1759 adev->mman.fw_vram_usage_size,
1760 AMDGPU_GEM_DOMAIN_VRAM,
1761 &adev->mman.fw_vram_usage_reserved_bo,
1762 &adev->mman.fw_vram_usage_va);
1763 }
1764
1765 /*
1766 * Memoy training reservation functions
1767 */
1768
1769 /**
1770 * amdgpu_ttm_training_reserve_vram_fini - free memory training reserved vram
1771 *
1772 * @adev: amdgpu_device pointer
1773 *
1774 * free memory training reserved vram if it has been reserved.
1775 */
amdgpu_ttm_training_reserve_vram_fini(struct amdgpu_device * adev)1776 static int amdgpu_ttm_training_reserve_vram_fini(struct amdgpu_device *adev)
1777 {
1778 struct psp_memory_training_context *ctx = &adev->psp.mem_train_ctx;
1779
1780 ctx->init = PSP_MEM_TRAIN_NOT_SUPPORT;
1781 amdgpu_bo_free_kernel(&ctx->c2p_bo, NULL, NULL);
1782 ctx->c2p_bo = NULL;
1783
1784 return 0;
1785 }
1786
amdgpu_ttm_training_data_block_init(struct amdgpu_device * adev)1787 static void amdgpu_ttm_training_data_block_init(struct amdgpu_device *adev)
1788 {
1789 struct psp_memory_training_context *ctx = &adev->psp.mem_train_ctx;
1790
1791 memset(ctx, 0, sizeof(*ctx));
1792
1793 ctx->c2p_train_data_offset =
1794 ALIGN((adev->gmc.mc_vram_size - adev->mman.discovery_tmr_size - SZ_1M), SZ_1M);
1795 ctx->p2c_train_data_offset =
1796 (adev->gmc.mc_vram_size - GDDR6_MEM_TRAINING_OFFSET);
1797 ctx->train_data_size =
1798 GDDR6_MEM_TRAINING_DATA_SIZE_IN_BYTES;
1799
1800 DRM_DEBUG("train_data_size:%llx,p2c_train_data_offset:%llx,c2p_train_data_offset:%llx.\n",
1801 ctx->train_data_size,
1802 ctx->p2c_train_data_offset,
1803 ctx->c2p_train_data_offset);
1804 }
1805
1806 /*
1807 * reserve TMR memory at the top of VRAM which holds
1808 * IP Discovery data and is protected by PSP.
1809 */
amdgpu_ttm_reserve_tmr(struct amdgpu_device * adev)1810 static int amdgpu_ttm_reserve_tmr(struct amdgpu_device *adev)
1811 {
1812 int ret;
1813 struct psp_memory_training_context *ctx = &adev->psp.mem_train_ctx;
1814 bool mem_train_support = false;
1815
1816 if (!amdgpu_sriov_vf(adev)) {
1817 ret = amdgpu_mem_train_support(adev);
1818 if (ret == 1)
1819 mem_train_support = true;
1820 else if (ret == -1)
1821 return -EINVAL;
1822 else
1823 DRM_DEBUG("memory training does not support!\n");
1824 }
1825
1826 /*
1827 * Query reserved tmr size through atom firmwareinfo for Sienna_Cichlid and onwards for all
1828 * the use cases (IP discovery/G6 memory training/profiling/diagnostic data.etc)
1829 *
1830 * Otherwise, fallback to legacy approach to check and reserve tmr block for ip
1831 * discovery data and G6 memory training data respectively
1832 */
1833 adev->mman.discovery_tmr_size =
1834 amdgpu_atomfirmware_get_fw_reserved_fb_size(adev);
1835 if (!adev->mman.discovery_tmr_size)
1836 adev->mman.discovery_tmr_size = DISCOVERY_TMR_OFFSET;
1837
1838 if (mem_train_support) {
1839 /* reserve vram for mem train according to TMR location */
1840 amdgpu_ttm_training_data_block_init(adev);
1841 ret = amdgpu_bo_create_kernel_at(adev,
1842 ctx->c2p_train_data_offset,
1843 ctx->train_data_size,
1844 AMDGPU_GEM_DOMAIN_VRAM,
1845 &ctx->c2p_bo,
1846 NULL);
1847 if (ret) {
1848 DRM_ERROR("alloc c2p_bo failed(%d)!\n", ret);
1849 amdgpu_ttm_training_reserve_vram_fini(adev);
1850 return ret;
1851 }
1852 ctx->init = PSP_MEM_TRAIN_RESERVE_SUCCESS;
1853 }
1854
1855 ret = amdgpu_bo_create_kernel_at(adev,
1856 adev->gmc.real_vram_size - adev->mman.discovery_tmr_size,
1857 adev->mman.discovery_tmr_size,
1858 AMDGPU_GEM_DOMAIN_VRAM,
1859 &adev->mman.discovery_memory,
1860 NULL);
1861 if (ret) {
1862 DRM_ERROR("alloc tmr failed(%d)!\n", ret);
1863 amdgpu_bo_free_kernel(&adev->mman.discovery_memory, NULL, NULL);
1864 return ret;
1865 }
1866
1867 return 0;
1868 }
1869
1870 /**
1871 * amdgpu_ttm_init - Init the memory management (ttm) as well as various
1872 * gtt/vram related fields.
1873 *
1874 * This initializes all of the memory space pools that the TTM layer
1875 * will need such as the GTT space (system memory mapped to the device),
1876 * VRAM (on-board memory), and on-chip memories (GDS, GWS, OA) which
1877 * can be mapped per VMID.
1878 */
amdgpu_ttm_init(struct amdgpu_device * adev)1879 int amdgpu_ttm_init(struct amdgpu_device *adev)
1880 {
1881 uint64_t gtt_size;
1882 int r;
1883 u64 vis_vram_limit;
1884
1885 mutex_init(&adev->mman.gtt_window_lock);
1886
1887 /* No others user of address space so set it to 0 */
1888 r = ttm_bo_device_init(&adev->mman.bdev,
1889 &amdgpu_bo_driver,
1890 adev_to_drm(adev)->anon_inode->i_mapping,
1891 adev_to_drm(adev)->vma_offset_manager,
1892 dma_addressing_limited(adev->dev));
1893 if (r) {
1894 DRM_ERROR("failed initializing buffer object driver(%d).\n", r);
1895 return r;
1896 }
1897 adev->mman.initialized = true;
1898
1899 /* We opt to avoid OOM on system pages allocations */
1900 adev->mman.bdev.no_retry = true;
1901
1902 /* Initialize VRAM pool with all of VRAM divided into pages */
1903 r = amdgpu_vram_mgr_init(adev);
1904 if (r) {
1905 DRM_ERROR("Failed initializing VRAM heap.\n");
1906 return r;
1907 }
1908
1909 /* Reduce size of CPU-visible VRAM if requested */
1910 vis_vram_limit = (u64)amdgpu_vis_vram_limit * 1024 * 1024;
1911 if (amdgpu_vis_vram_limit > 0 &&
1912 vis_vram_limit <= adev->gmc.visible_vram_size)
1913 adev->gmc.visible_vram_size = vis_vram_limit;
1914
1915 /* Change the size here instead of the init above so only lpfn is affected */
1916 amdgpu_ttm_set_buffer_funcs_status(adev, false);
1917 #ifdef CONFIG_64BIT
1918 adev->mman.aper_base_kaddr = ioremap_wc(adev->gmc.aper_base,
1919 adev->gmc.visible_vram_size);
1920 #endif
1921
1922 /*
1923 *The reserved vram for firmware must be pinned to the specified
1924 *place on the VRAM, so reserve it early.
1925 */
1926 r = amdgpu_ttm_fw_reserve_vram_init(adev);
1927 if (r) {
1928 return r;
1929 }
1930
1931 /*
1932 * only NAVI10 and onwards ASIC support for IP discovery.
1933 * If IP discovery enabled, a block of memory should be
1934 * reserved for IP discovey.
1935 */
1936 if (adev->mman.discovery_bin) {
1937 r = amdgpu_ttm_reserve_tmr(adev);
1938 if (r)
1939 return r;
1940 }
1941
1942 /* allocate memory as required for VGA
1943 * This is used for VGA emulation and pre-OS scanout buffers to
1944 * avoid display artifacts while transitioning between pre-OS
1945 * and driver. */
1946 r = amdgpu_bo_create_kernel_at(adev, 0, adev->mman.stolen_vga_size,
1947 AMDGPU_GEM_DOMAIN_VRAM,
1948 &adev->mman.stolen_vga_memory,
1949 NULL);
1950 if (r)
1951 return r;
1952 r = amdgpu_bo_create_kernel_at(adev, adev->mman.stolen_vga_size,
1953 adev->mman.stolen_extended_size,
1954 AMDGPU_GEM_DOMAIN_VRAM,
1955 &adev->mman.stolen_extended_memory,
1956 NULL);
1957 if (r)
1958 return r;
1959
1960 DRM_INFO("amdgpu: %uM of VRAM memory ready\n",
1961 (unsigned) (adev->gmc.real_vram_size / (1024 * 1024)));
1962
1963 /* Compute GTT size, either bsaed on 3/4th the size of RAM size
1964 * or whatever the user passed on module init */
1965 if (amdgpu_gtt_size == -1) {
1966 struct sysinfo si;
1967
1968 si_meminfo(&si);
1969 gtt_size = min(max((AMDGPU_DEFAULT_GTT_SIZE_MB << 20),
1970 adev->gmc.mc_vram_size),
1971 ((uint64_t)si.totalram * si.mem_unit * 3/4));
1972 }
1973 else
1974 gtt_size = (uint64_t)amdgpu_gtt_size << 20;
1975
1976 /* Initialize GTT memory pool */
1977 r = amdgpu_gtt_mgr_init(adev, gtt_size);
1978 if (r) {
1979 DRM_ERROR("Failed initializing GTT heap.\n");
1980 return r;
1981 }
1982 DRM_INFO("amdgpu: %uM of GTT memory ready.\n",
1983 (unsigned)(gtt_size / (1024 * 1024)));
1984
1985 /* Initialize various on-chip memory pools */
1986 r = amdgpu_ttm_init_on_chip(adev, AMDGPU_PL_GDS, adev->gds.gds_size);
1987 if (r) {
1988 DRM_ERROR("Failed initializing GDS heap.\n");
1989 return r;
1990 }
1991
1992 r = amdgpu_ttm_init_on_chip(adev, AMDGPU_PL_GWS, adev->gds.gws_size);
1993 if (r) {
1994 DRM_ERROR("Failed initializing gws heap.\n");
1995 return r;
1996 }
1997
1998 r = amdgpu_ttm_init_on_chip(adev, AMDGPU_PL_OA, adev->gds.oa_size);
1999 if (r) {
2000 DRM_ERROR("Failed initializing oa heap.\n");
2001 return r;
2002 }
2003
2004 return 0;
2005 }
2006
2007 /**
2008 * amdgpu_ttm_late_init - Handle any late initialization for amdgpu_ttm
2009 */
amdgpu_ttm_late_init(struct amdgpu_device * adev)2010 void amdgpu_ttm_late_init(struct amdgpu_device *adev)
2011 {
2012 /* return the VGA stolen memory (if any) back to VRAM */
2013 if (!adev->mman.keep_stolen_vga_memory)
2014 amdgpu_bo_free_kernel(&adev->mman.stolen_vga_memory, NULL, NULL);
2015 amdgpu_bo_free_kernel(&adev->mman.stolen_extended_memory, NULL, NULL);
2016 }
2017
2018 /**
2019 * amdgpu_ttm_fini - De-initialize the TTM memory pools
2020 */
amdgpu_ttm_fini(struct amdgpu_device * adev)2021 void amdgpu_ttm_fini(struct amdgpu_device *adev)
2022 {
2023 if (!adev->mman.initialized)
2024 return;
2025
2026 amdgpu_ttm_training_reserve_vram_fini(adev);
2027 /* return the stolen vga memory back to VRAM */
2028 if (adev->mman.keep_stolen_vga_memory)
2029 amdgpu_bo_free_kernel(&adev->mman.stolen_vga_memory, NULL, NULL);
2030 /* return the IP Discovery TMR memory back to VRAM */
2031 amdgpu_bo_free_kernel(&adev->mman.discovery_memory, NULL, NULL);
2032 amdgpu_ttm_fw_reserve_vram_fini(adev);
2033
2034 if (adev->mman.aper_base_kaddr)
2035 iounmap(adev->mman.aper_base_kaddr);
2036 adev->mman.aper_base_kaddr = NULL;
2037
2038 amdgpu_vram_mgr_fini(adev);
2039 amdgpu_gtt_mgr_fini(adev);
2040 ttm_range_man_fini(&adev->mman.bdev, AMDGPU_PL_GDS);
2041 ttm_range_man_fini(&adev->mman.bdev, AMDGPU_PL_GWS);
2042 ttm_range_man_fini(&adev->mman.bdev, AMDGPU_PL_OA);
2043 ttm_bo_device_release(&adev->mman.bdev);
2044 adev->mman.initialized = false;
2045 DRM_INFO("amdgpu: ttm finalized\n");
2046 }
2047
2048 /**
2049 * amdgpu_ttm_set_buffer_funcs_status - enable/disable use of buffer functions
2050 *
2051 * @adev: amdgpu_device pointer
2052 * @enable: true when we can use buffer functions.
2053 *
2054 * Enable/disable use of buffer functions during suspend/resume. This should
2055 * only be called at bootup or when userspace isn't running.
2056 */
amdgpu_ttm_set_buffer_funcs_status(struct amdgpu_device * adev,bool enable)2057 void amdgpu_ttm_set_buffer_funcs_status(struct amdgpu_device *adev, bool enable)
2058 {
2059 struct ttm_resource_manager *man = ttm_manager_type(&adev->mman.bdev, TTM_PL_VRAM);
2060 uint64_t size;
2061 int r;
2062
2063 if (!adev->mman.initialized || amdgpu_in_reset(adev) ||
2064 adev->mman.buffer_funcs_enabled == enable)
2065 return;
2066
2067 if (enable) {
2068 struct amdgpu_ring *ring;
2069 struct drm_gpu_scheduler *sched;
2070
2071 ring = adev->mman.buffer_funcs_ring;
2072 sched = &ring->sched;
2073 r = drm_sched_entity_init(&adev->mman.entity,
2074 DRM_SCHED_PRIORITY_KERNEL, &sched,
2075 1, NULL);
2076 if (r) {
2077 DRM_ERROR("Failed setting up TTM BO move entity (%d)\n",
2078 r);
2079 return;
2080 }
2081 } else {
2082 drm_sched_entity_destroy(&adev->mman.entity);
2083 dma_fence_put(man->move);
2084 man->move = NULL;
2085 }
2086
2087 /* this just adjusts TTM size idea, which sets lpfn to the correct value */
2088 if (enable)
2089 size = adev->gmc.real_vram_size;
2090 else
2091 size = adev->gmc.visible_vram_size;
2092 man->size = size >> PAGE_SHIFT;
2093 adev->mman.buffer_funcs_enabled = enable;
2094 }
2095
amdgpu_mmap(struct file * filp,struct vm_area_struct * vma)2096 int amdgpu_mmap(struct file *filp, struct vm_area_struct *vma)
2097 {
2098 struct drm_file *file_priv = filp->private_data;
2099 struct amdgpu_device *adev = drm_to_adev(file_priv->minor->dev);
2100
2101 if (adev == NULL)
2102 return -EINVAL;
2103
2104 return ttm_bo_mmap(filp, vma, &adev->mman.bdev);
2105 }
2106
amdgpu_copy_buffer(struct amdgpu_ring * ring,uint64_t src_offset,uint64_t dst_offset,uint32_t byte_count,struct dma_resv * resv,struct dma_fence ** fence,bool direct_submit,bool vm_needs_flush,bool tmz)2107 int amdgpu_copy_buffer(struct amdgpu_ring *ring, uint64_t src_offset,
2108 uint64_t dst_offset, uint32_t byte_count,
2109 struct dma_resv *resv,
2110 struct dma_fence **fence, bool direct_submit,
2111 bool vm_needs_flush, bool tmz)
2112 {
2113 enum amdgpu_ib_pool_type pool = direct_submit ? AMDGPU_IB_POOL_DIRECT :
2114 AMDGPU_IB_POOL_DELAYED;
2115 struct amdgpu_device *adev = ring->adev;
2116 struct amdgpu_job *job;
2117
2118 uint32_t max_bytes;
2119 unsigned num_loops, num_dw;
2120 unsigned i;
2121 int r;
2122
2123 if (!direct_submit && !ring->sched.ready) {
2124 DRM_ERROR("Trying to move memory with ring turned off.\n");
2125 return -EINVAL;
2126 }
2127
2128 max_bytes = adev->mman.buffer_funcs->copy_max_bytes;
2129 num_loops = DIV_ROUND_UP(byte_count, max_bytes);
2130 num_dw = ALIGN(num_loops * adev->mman.buffer_funcs->copy_num_dw, 8);
2131
2132 r = amdgpu_job_alloc_with_ib(adev, num_dw * 4, pool, &job);
2133 if (r)
2134 return r;
2135
2136 if (vm_needs_flush) {
2137 job->vm_pd_addr = amdgpu_gmc_pd_addr(adev->gart.bo);
2138 job->vm_needs_flush = true;
2139 }
2140 if (resv) {
2141 r = amdgpu_sync_resv(adev, &job->sync, resv,
2142 AMDGPU_SYNC_ALWAYS,
2143 AMDGPU_FENCE_OWNER_UNDEFINED);
2144 if (r) {
2145 DRM_ERROR("sync failed (%d).\n", r);
2146 goto error_free;
2147 }
2148 }
2149
2150 for (i = 0; i < num_loops; i++) {
2151 uint32_t cur_size_in_bytes = min(byte_count, max_bytes);
2152
2153 amdgpu_emit_copy_buffer(adev, &job->ibs[0], src_offset,
2154 dst_offset, cur_size_in_bytes, tmz);
2155
2156 src_offset += cur_size_in_bytes;
2157 dst_offset += cur_size_in_bytes;
2158 byte_count -= cur_size_in_bytes;
2159 }
2160
2161 amdgpu_ring_pad_ib(ring, &job->ibs[0]);
2162 WARN_ON(job->ibs[0].length_dw > num_dw);
2163 if (direct_submit)
2164 r = amdgpu_job_submit_direct(job, ring, fence);
2165 else
2166 r = amdgpu_job_submit(job, &adev->mman.entity,
2167 AMDGPU_FENCE_OWNER_UNDEFINED, fence);
2168 if (r)
2169 goto error_free;
2170
2171 return r;
2172
2173 error_free:
2174 amdgpu_job_free(job);
2175 DRM_ERROR("Error scheduling IBs (%d)\n", r);
2176 return r;
2177 }
2178
amdgpu_fill_buffer(struct amdgpu_bo * bo,uint32_t src_data,struct dma_resv * resv,struct dma_fence ** fence)2179 int amdgpu_fill_buffer(struct amdgpu_bo *bo,
2180 uint32_t src_data,
2181 struct dma_resv *resv,
2182 struct dma_fence **fence)
2183 {
2184 struct amdgpu_device *adev = amdgpu_ttm_adev(bo->tbo.bdev);
2185 uint32_t max_bytes = adev->mman.buffer_funcs->fill_max_bytes;
2186 struct amdgpu_ring *ring = adev->mman.buffer_funcs_ring;
2187
2188 struct drm_mm_node *mm_node;
2189 unsigned long num_pages;
2190 unsigned int num_loops, num_dw;
2191
2192 struct amdgpu_job *job;
2193 int r;
2194
2195 if (!adev->mman.buffer_funcs_enabled) {
2196 DRM_ERROR("Trying to clear memory with ring turned off.\n");
2197 return -EINVAL;
2198 }
2199
2200 if (bo->tbo.mem.mem_type == TTM_PL_TT) {
2201 r = amdgpu_ttm_alloc_gart(&bo->tbo);
2202 if (r)
2203 return r;
2204 }
2205
2206 num_pages = bo->tbo.num_pages;
2207 mm_node = bo->tbo.mem.mm_node;
2208 num_loops = 0;
2209 while (num_pages) {
2210 uint64_t byte_count = mm_node->size << PAGE_SHIFT;
2211
2212 num_loops += DIV_ROUND_UP_ULL(byte_count, max_bytes);
2213 num_pages -= mm_node->size;
2214 ++mm_node;
2215 }
2216 num_dw = num_loops * adev->mman.buffer_funcs->fill_num_dw;
2217
2218 /* for IB padding */
2219 num_dw += 64;
2220
2221 r = amdgpu_job_alloc_with_ib(adev, num_dw * 4, AMDGPU_IB_POOL_DELAYED,
2222 &job);
2223 if (r)
2224 return r;
2225
2226 if (resv) {
2227 r = amdgpu_sync_resv(adev, &job->sync, resv,
2228 AMDGPU_SYNC_ALWAYS,
2229 AMDGPU_FENCE_OWNER_UNDEFINED);
2230 if (r) {
2231 DRM_ERROR("sync failed (%d).\n", r);
2232 goto error_free;
2233 }
2234 }
2235
2236 num_pages = bo->tbo.num_pages;
2237 mm_node = bo->tbo.mem.mm_node;
2238
2239 while (num_pages) {
2240 uint64_t byte_count = mm_node->size << PAGE_SHIFT;
2241 uint64_t dst_addr;
2242
2243 dst_addr = amdgpu_mm_node_addr(&bo->tbo, mm_node, &bo->tbo.mem);
2244 while (byte_count) {
2245 uint32_t cur_size_in_bytes = min_t(uint64_t, byte_count,
2246 max_bytes);
2247
2248 amdgpu_emit_fill_buffer(adev, &job->ibs[0], src_data,
2249 dst_addr, cur_size_in_bytes);
2250
2251 dst_addr += cur_size_in_bytes;
2252 byte_count -= cur_size_in_bytes;
2253 }
2254
2255 num_pages -= mm_node->size;
2256 ++mm_node;
2257 }
2258
2259 amdgpu_ring_pad_ib(ring, &job->ibs[0]);
2260 WARN_ON(job->ibs[0].length_dw > num_dw);
2261 r = amdgpu_job_submit(job, &adev->mman.entity,
2262 AMDGPU_FENCE_OWNER_UNDEFINED, fence);
2263 if (r)
2264 goto error_free;
2265
2266 return 0;
2267
2268 error_free:
2269 amdgpu_job_free(job);
2270 return r;
2271 }
2272
2273 #if defined(CONFIG_DEBUG_FS)
2274
amdgpu_mm_dump_table(struct seq_file * m,void * data)2275 static int amdgpu_mm_dump_table(struct seq_file *m, void *data)
2276 {
2277 struct drm_info_node *node = (struct drm_info_node *)m->private;
2278 unsigned ttm_pl = (uintptr_t)node->info_ent->data;
2279 struct drm_device *dev = node->minor->dev;
2280 struct amdgpu_device *adev = drm_to_adev(dev);
2281 struct ttm_resource_manager *man = ttm_manager_type(&adev->mman.bdev, ttm_pl);
2282 struct drm_printer p = drm_seq_file_printer(m);
2283
2284 man->func->debug(man, &p);
2285 return 0;
2286 }
2287
2288 static const struct drm_info_list amdgpu_ttm_debugfs_list[] = {
2289 {"amdgpu_vram_mm", amdgpu_mm_dump_table, 0, (void *)TTM_PL_VRAM},
2290 {"amdgpu_gtt_mm", amdgpu_mm_dump_table, 0, (void *)TTM_PL_TT},
2291 {"amdgpu_gds_mm", amdgpu_mm_dump_table, 0, (void *)AMDGPU_PL_GDS},
2292 {"amdgpu_gws_mm", amdgpu_mm_dump_table, 0, (void *)AMDGPU_PL_GWS},
2293 {"amdgpu_oa_mm", amdgpu_mm_dump_table, 0, (void *)AMDGPU_PL_OA},
2294 {"ttm_page_pool", ttm_page_alloc_debugfs, 0, NULL},
2295 #ifdef CONFIG_SWIOTLB
2296 {"ttm_dma_page_pool", ttm_dma_page_alloc_debugfs, 0, NULL}
2297 #endif
2298 };
2299
2300 /**
2301 * amdgpu_ttm_vram_read - Linear read access to VRAM
2302 *
2303 * Accesses VRAM via MMIO for debugging purposes.
2304 */
amdgpu_ttm_vram_read(struct file * f,char __user * buf,size_t size,loff_t * pos)2305 static ssize_t amdgpu_ttm_vram_read(struct file *f, char __user *buf,
2306 size_t size, loff_t *pos)
2307 {
2308 struct amdgpu_device *adev = file_inode(f)->i_private;
2309 ssize_t result = 0;
2310
2311 if (size & 0x3 || *pos & 0x3)
2312 return -EINVAL;
2313
2314 if (*pos >= adev->gmc.mc_vram_size)
2315 return -ENXIO;
2316
2317 size = min(size, (size_t)(adev->gmc.mc_vram_size - *pos));
2318 while (size) {
2319 size_t bytes = min(size, AMDGPU_TTM_VRAM_MAX_DW_READ * 4);
2320 uint32_t value[AMDGPU_TTM_VRAM_MAX_DW_READ];
2321
2322 amdgpu_device_vram_access(adev, *pos, value, bytes, false);
2323 if (copy_to_user(buf, value, bytes))
2324 return -EFAULT;
2325
2326 result += bytes;
2327 buf += bytes;
2328 *pos += bytes;
2329 size -= bytes;
2330 }
2331
2332 return result;
2333 }
2334
2335 /**
2336 * amdgpu_ttm_vram_write - Linear write access to VRAM
2337 *
2338 * Accesses VRAM via MMIO for debugging purposes.
2339 */
amdgpu_ttm_vram_write(struct file * f,const char __user * buf,size_t size,loff_t * pos)2340 static ssize_t amdgpu_ttm_vram_write(struct file *f, const char __user *buf,
2341 size_t size, loff_t *pos)
2342 {
2343 struct amdgpu_device *adev = file_inode(f)->i_private;
2344 ssize_t result = 0;
2345 int r;
2346
2347 if (size & 0x3 || *pos & 0x3)
2348 return -EINVAL;
2349
2350 if (*pos >= adev->gmc.mc_vram_size)
2351 return -ENXIO;
2352
2353 while (size) {
2354 unsigned long flags;
2355 uint32_t value;
2356
2357 if (*pos >= adev->gmc.mc_vram_size)
2358 return result;
2359
2360 r = get_user(value, (uint32_t *)buf);
2361 if (r)
2362 return r;
2363
2364 spin_lock_irqsave(&adev->mmio_idx_lock, flags);
2365 WREG32_NO_KIQ(mmMM_INDEX, ((uint32_t)*pos) | 0x80000000);
2366 WREG32_NO_KIQ(mmMM_INDEX_HI, *pos >> 31);
2367 WREG32_NO_KIQ(mmMM_DATA, value);
2368 spin_unlock_irqrestore(&adev->mmio_idx_lock, flags);
2369
2370 result += 4;
2371 buf += 4;
2372 *pos += 4;
2373 size -= 4;
2374 }
2375
2376 return result;
2377 }
2378
2379 static const struct file_operations amdgpu_ttm_vram_fops = {
2380 .owner = THIS_MODULE,
2381 .read = amdgpu_ttm_vram_read,
2382 .write = amdgpu_ttm_vram_write,
2383 .llseek = default_llseek,
2384 };
2385
2386 #ifdef CONFIG_DRM_AMDGPU_GART_DEBUGFS
2387
2388 /**
2389 * amdgpu_ttm_gtt_read - Linear read access to GTT memory
2390 */
amdgpu_ttm_gtt_read(struct file * f,char __user * buf,size_t size,loff_t * pos)2391 static ssize_t amdgpu_ttm_gtt_read(struct file *f, char __user *buf,
2392 size_t size, loff_t *pos)
2393 {
2394 struct amdgpu_device *adev = file_inode(f)->i_private;
2395 ssize_t result = 0;
2396 int r;
2397
2398 while (size) {
2399 loff_t p = *pos / PAGE_SIZE;
2400 unsigned off = *pos & ~PAGE_MASK;
2401 size_t cur_size = min_t(size_t, size, PAGE_SIZE - off);
2402 struct page *page;
2403 void *ptr;
2404
2405 if (p >= adev->gart.num_cpu_pages)
2406 return result;
2407
2408 page = adev->gart.pages[p];
2409 if (page) {
2410 ptr = kmap(page);
2411 ptr += off;
2412
2413 r = copy_to_user(buf, ptr, cur_size);
2414 kunmap(adev->gart.pages[p]);
2415 } else
2416 r = clear_user(buf, cur_size);
2417
2418 if (r)
2419 return -EFAULT;
2420
2421 result += cur_size;
2422 buf += cur_size;
2423 *pos += cur_size;
2424 size -= cur_size;
2425 }
2426
2427 return result;
2428 }
2429
2430 static const struct file_operations amdgpu_ttm_gtt_fops = {
2431 .owner = THIS_MODULE,
2432 .read = amdgpu_ttm_gtt_read,
2433 .llseek = default_llseek
2434 };
2435
2436 #endif
2437
2438 /**
2439 * amdgpu_iomem_read - Virtual read access to GPU mapped memory
2440 *
2441 * This function is used to read memory that has been mapped to the
2442 * GPU and the known addresses are not physical addresses but instead
2443 * bus addresses (e.g., what you'd put in an IB or ring buffer).
2444 */
amdgpu_iomem_read(struct file * f,char __user * buf,size_t size,loff_t * pos)2445 static ssize_t amdgpu_iomem_read(struct file *f, char __user *buf,
2446 size_t size, loff_t *pos)
2447 {
2448 struct amdgpu_device *adev = file_inode(f)->i_private;
2449 struct iommu_domain *dom;
2450 ssize_t result = 0;
2451 int r;
2452
2453 /* retrieve the IOMMU domain if any for this device */
2454 dom = iommu_get_domain_for_dev(adev->dev);
2455
2456 while (size) {
2457 phys_addr_t addr = *pos & PAGE_MASK;
2458 loff_t off = *pos & ~PAGE_MASK;
2459 size_t bytes = PAGE_SIZE - off;
2460 unsigned long pfn;
2461 struct page *p;
2462 void *ptr;
2463
2464 bytes = bytes < size ? bytes : size;
2465
2466 /* Translate the bus address to a physical address. If
2467 * the domain is NULL it means there is no IOMMU active
2468 * and the address translation is the identity
2469 */
2470 addr = dom ? iommu_iova_to_phys(dom, addr) : addr;
2471
2472 pfn = addr >> PAGE_SHIFT;
2473 if (!pfn_valid(pfn))
2474 return -EPERM;
2475
2476 p = pfn_to_page(pfn);
2477 if (p->mapping != adev->mman.bdev.dev_mapping)
2478 return -EPERM;
2479
2480 ptr = kmap(p);
2481 r = copy_to_user(buf, ptr + off, bytes);
2482 kunmap(p);
2483 if (r)
2484 return -EFAULT;
2485
2486 size -= bytes;
2487 *pos += bytes;
2488 result += bytes;
2489 }
2490
2491 return result;
2492 }
2493
2494 /**
2495 * amdgpu_iomem_write - Virtual write access to GPU mapped memory
2496 *
2497 * This function is used to write memory that has been mapped to the
2498 * GPU and the known addresses are not physical addresses but instead
2499 * bus addresses (e.g., what you'd put in an IB or ring buffer).
2500 */
amdgpu_iomem_write(struct file * f,const char __user * buf,size_t size,loff_t * pos)2501 static ssize_t amdgpu_iomem_write(struct file *f, const char __user *buf,
2502 size_t size, loff_t *pos)
2503 {
2504 struct amdgpu_device *adev = file_inode(f)->i_private;
2505 struct iommu_domain *dom;
2506 ssize_t result = 0;
2507 int r;
2508
2509 dom = iommu_get_domain_for_dev(adev->dev);
2510
2511 while (size) {
2512 phys_addr_t addr = *pos & PAGE_MASK;
2513 loff_t off = *pos & ~PAGE_MASK;
2514 size_t bytes = PAGE_SIZE - off;
2515 unsigned long pfn;
2516 struct page *p;
2517 void *ptr;
2518
2519 bytes = bytes < size ? bytes : size;
2520
2521 addr = dom ? iommu_iova_to_phys(dom, addr) : addr;
2522
2523 pfn = addr >> PAGE_SHIFT;
2524 if (!pfn_valid(pfn))
2525 return -EPERM;
2526
2527 p = pfn_to_page(pfn);
2528 if (p->mapping != adev->mman.bdev.dev_mapping)
2529 return -EPERM;
2530
2531 ptr = kmap(p);
2532 r = copy_from_user(ptr + off, buf, bytes);
2533 kunmap(p);
2534 if (r)
2535 return -EFAULT;
2536
2537 size -= bytes;
2538 *pos += bytes;
2539 result += bytes;
2540 }
2541
2542 return result;
2543 }
2544
2545 static const struct file_operations amdgpu_ttm_iomem_fops = {
2546 .owner = THIS_MODULE,
2547 .read = amdgpu_iomem_read,
2548 .write = amdgpu_iomem_write,
2549 .llseek = default_llseek
2550 };
2551
2552 static const struct {
2553 char *name;
2554 const struct file_operations *fops;
2555 int domain;
2556 } ttm_debugfs_entries[] = {
2557 { "amdgpu_vram", &amdgpu_ttm_vram_fops, TTM_PL_VRAM },
2558 #ifdef CONFIG_DRM_AMDGPU_GART_DEBUGFS
2559 { "amdgpu_gtt", &amdgpu_ttm_gtt_fops, TTM_PL_TT },
2560 #endif
2561 { "amdgpu_iomem", &amdgpu_ttm_iomem_fops, TTM_PL_SYSTEM },
2562 };
2563
2564 #endif
2565
amdgpu_ttm_debugfs_init(struct amdgpu_device * adev)2566 int amdgpu_ttm_debugfs_init(struct amdgpu_device *adev)
2567 {
2568 #if defined(CONFIG_DEBUG_FS)
2569 unsigned count;
2570
2571 struct drm_minor *minor = adev_to_drm(adev)->primary;
2572 struct dentry *ent, *root = minor->debugfs_root;
2573
2574 for (count = 0; count < ARRAY_SIZE(ttm_debugfs_entries); count++) {
2575 ent = debugfs_create_file(
2576 ttm_debugfs_entries[count].name,
2577 S_IFREG | S_IRUGO, root,
2578 adev,
2579 ttm_debugfs_entries[count].fops);
2580 if (IS_ERR(ent))
2581 return PTR_ERR(ent);
2582 if (ttm_debugfs_entries[count].domain == TTM_PL_VRAM)
2583 i_size_write(ent->d_inode, adev->gmc.mc_vram_size);
2584 else if (ttm_debugfs_entries[count].domain == TTM_PL_TT)
2585 i_size_write(ent->d_inode, adev->gmc.gart_size);
2586 adev->mman.debugfs_entries[count] = ent;
2587 }
2588
2589 count = ARRAY_SIZE(amdgpu_ttm_debugfs_list);
2590
2591 #ifdef CONFIG_SWIOTLB
2592 if (!(adev->need_swiotlb && swiotlb_nr_tbl()))
2593 --count;
2594 #endif
2595
2596 return amdgpu_debugfs_add_files(adev, amdgpu_ttm_debugfs_list, count);
2597 #else
2598 return 0;
2599 #endif
2600 }
2601