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1/*
2 * Copyright 2009 Jerome Glisse.
3 * All Rights Reserved.
4 *
5 * Permission is hereby granted, free of charge, to any person obtaining a
6 * copy of this software and associated documentation files (the
7 * "Software"), to deal in the Software without restriction, including
8 * without limitation the rights to use, copy, modify, merge, publish,
9 * distribute, sub license, and/or sell copies of the Software, and to
10 * permit persons to whom the Software is furnished to do so, subject to
11 * the following conditions:
12 *
13 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
14 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
15 * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL
16 * THE COPYRIGHT HOLDERS, AUTHORS AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM,
17 * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
18 * OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
19 * USE OR OTHER DEALINGS IN THE SOFTWARE.
20 *
21 * The above copyright notice and this permission notice (including the
22 * next paragraph) shall be included in all copies or substantial portions
23 * of the Software.
24 *
25 */
26/*
27 * Authors:
28 * Jerome Glisse <glisse@freedesktop.org>
29 * Thomas Hellstrom <thomas-at-tungstengraphics-dot-com>
30 * Dave Airlie
31 */
32#include <ttm/ttm_bo_api.h>
33#include <ttm/ttm_bo_driver.h>
34#include <ttm/ttm_placement.h>
35#include <ttm/ttm_module.h>
36#include <ttm/ttm_page_alloc.h>
37#include <drm/drmP.h>
38#include <drm/radeon_drm.h>
39#include <linux/seq_file.h>
40#include <linux/slab.h>
41#include "radeon_reg.h"
42#include "radeon.h"
43
44#define DRM_FILE_PAGE_OFFSET (0x100000000ULL >> PAGE_SHIFT)
45
46static int radeon_ttm_debugfs_init(struct radeon_device *rdev);
47
48static struct radeon_device *radeon_get_rdev(struct ttm_bo_device *bdev)
49{
50 struct radeon_mman *mman;
51 struct radeon_device *rdev;
52
53 mman = container_of(bdev, struct radeon_mman, bdev);
54 rdev = container_of(mman, struct radeon_device, mman);
55 return rdev;
56}
57
58
59/*
60 * Global memory.
61 */
62static int radeon_ttm_mem_global_init(struct drm_global_reference *ref)
63{
64 return ttm_mem_global_init(ref->object);
65}
66
67static void radeon_ttm_mem_global_release(struct drm_global_reference *ref)
68{
69 ttm_mem_global_release(ref->object);
70}
71
72static int radeon_ttm_global_init(struct radeon_device *rdev)
73{
74 struct drm_global_reference *global_ref;
75 int r;
76
77 rdev->mman.mem_global_referenced = false;
78 global_ref = &rdev->mman.mem_global_ref;
79 global_ref->global_type = DRM_GLOBAL_TTM_MEM;
80 global_ref->size = sizeof(struct ttm_mem_global);
81 global_ref->init = &radeon_ttm_mem_global_init;
82 global_ref->release = &radeon_ttm_mem_global_release;
83 r = drm_global_item_ref(global_ref);
84 if (r != 0) {
85 DRM_ERROR("Failed setting up TTM memory accounting "
86 "subsystem.\n");
87 return r;
88 }
89
90 rdev->mman.bo_global_ref.mem_glob =
91 rdev->mman.mem_global_ref.object;
92 global_ref = &rdev->mman.bo_global_ref.ref;
93 global_ref->global_type = DRM_GLOBAL_TTM_BO;
94 global_ref->size = sizeof(struct ttm_bo_global);
95 global_ref->init = &ttm_bo_global_init;
96 global_ref->release = &ttm_bo_global_release;
97 r = drm_global_item_ref(global_ref);
98 if (r != 0) {
99 DRM_ERROR("Failed setting up TTM BO subsystem.\n");
100 drm_global_item_unref(&rdev->mman.mem_global_ref);
101 return r;
102 }
103
104 rdev->mman.mem_global_referenced = true;
105 return 0;
106}
107
108static void radeon_ttm_global_fini(struct radeon_device *rdev)
109{
110 if (rdev->mman.mem_global_referenced) {
111 drm_global_item_unref(&rdev->mman.bo_global_ref.ref);
112 drm_global_item_unref(&rdev->mman.mem_global_ref);
113 rdev->mman.mem_global_referenced = false;
114 }
115}
116
117struct ttm_backend *radeon_ttm_backend_create(struct radeon_device *rdev);
118
119static struct ttm_backend*
120radeon_create_ttm_backend_entry(struct ttm_bo_device *bdev)
121{
122 struct radeon_device *rdev;
123
124 rdev = radeon_get_rdev(bdev);
125#if __OS_HAS_AGP
126 if (rdev->flags & RADEON_IS_AGP) {
127 return ttm_agp_backend_init(bdev, rdev->ddev->agp->bridge);
128 } else
129#endif
130 {
131 return radeon_ttm_backend_create(rdev);
132 }
133}
134
135static int radeon_invalidate_caches(struct ttm_bo_device *bdev, uint32_t flags)
136{
137 return 0;
138}
139
140static int radeon_init_mem_type(struct ttm_bo_device *bdev, uint32_t type,
141 struct ttm_mem_type_manager *man)
142{
143 struct radeon_device *rdev;
144
145 rdev = radeon_get_rdev(bdev);
146
147 switch (type) {
148 case TTM_PL_SYSTEM:
149 /* System memory */
150 man->flags = TTM_MEMTYPE_FLAG_MAPPABLE;
151 man->available_caching = TTM_PL_MASK_CACHING;
152 man->default_caching = TTM_PL_FLAG_CACHED;
153 break;
154 case TTM_PL_TT:
155 man->func = &ttm_bo_manager_func;
156 man->gpu_offset = rdev->mc.gtt_start;
157 man->available_caching = TTM_PL_MASK_CACHING;
158 man->default_caching = TTM_PL_FLAG_CACHED;
159 man->flags = TTM_MEMTYPE_FLAG_MAPPABLE | TTM_MEMTYPE_FLAG_CMA;
160#if __OS_HAS_AGP
161 if (rdev->flags & RADEON_IS_AGP) {
162 if (!(drm_core_has_AGP(rdev->ddev) && rdev->ddev->agp)) {
163 DRM_ERROR("AGP is not enabled for memory type %u\n",
164 (unsigned)type);
165 return -EINVAL;
166 }
167 if (!rdev->ddev->agp->cant_use_aperture)
168 man->flags = TTM_MEMTYPE_FLAG_MAPPABLE;
169 man->available_caching = TTM_PL_FLAG_UNCACHED |
170 TTM_PL_FLAG_WC;
171 man->default_caching = TTM_PL_FLAG_WC;
172 }
173#endif
174 break;
175 case TTM_PL_VRAM:
176 /* "On-card" video ram */
177 man->func = &ttm_bo_manager_func;
178 man->gpu_offset = rdev->mc.vram_start;
179 man->flags = TTM_MEMTYPE_FLAG_FIXED |
180 TTM_MEMTYPE_FLAG_MAPPABLE;
181 man->available_caching = TTM_PL_FLAG_UNCACHED | TTM_PL_FLAG_WC;
182 man->default_caching = TTM_PL_FLAG_WC;
183 break;
184 default:
185 DRM_ERROR("Unsupported memory type %u\n", (unsigned)type);
186 return -EINVAL;
187 }
188 return 0;
189}
190
191static void radeon_evict_flags(struct ttm_buffer_object *bo,
192 struct ttm_placement *placement)
193{
194 struct radeon_bo *rbo;
195 static u32 placements = TTM_PL_MASK_CACHING | TTM_PL_FLAG_SYSTEM;
196
197 if (!radeon_ttm_bo_is_radeon_bo(bo)) {
198 placement->fpfn = 0;
199 placement->lpfn = 0;
200 placement->placement = &placements;
201 placement->busy_placement = &placements;
202 placement->num_placement = 1;
203 placement->num_busy_placement = 1;
204 return;
205 }
206 rbo = container_of(bo, struct radeon_bo, tbo);
207 switch (bo->mem.mem_type) {
208 case TTM_PL_VRAM:
209 if (rbo->rdev->cp.ready == false)
210 radeon_ttm_placement_from_domain(rbo, RADEON_GEM_DOMAIN_CPU);
211 else
212 radeon_ttm_placement_from_domain(rbo, RADEON_GEM_DOMAIN_GTT);
213 break;
214 case TTM_PL_TT:
215 default:
216 radeon_ttm_placement_from_domain(rbo, RADEON_GEM_DOMAIN_CPU);
217 }
218 *placement = rbo->placement;
219}
220
221static int radeon_verify_access(struct ttm_buffer_object *bo, struct file *filp)
222{
223 return 0;
224}
225
226static void radeon_move_null(struct ttm_buffer_object *bo,
227 struct ttm_mem_reg *new_mem)
228{
229 struct ttm_mem_reg *old_mem = &bo->mem;
230
231 BUG_ON(old_mem->mm_node != NULL);
232 *old_mem = *new_mem;
233 new_mem->mm_node = NULL;
234}
235
236static int radeon_move_blit(struct ttm_buffer_object *bo,
237 bool evict, int no_wait_reserve, bool no_wait_gpu,
238 struct ttm_mem_reg *new_mem,
239 struct ttm_mem_reg *old_mem)
240{
241 struct radeon_device *rdev;
242 uint64_t old_start, new_start;
243 struct radeon_fence *fence;
244 int r;
245
246 rdev = radeon_get_rdev(bo->bdev);
247 r = radeon_fence_create(rdev, &fence);
248 if (unlikely(r)) {
249 return r;
250 }
251 old_start = old_mem->start << PAGE_SHIFT;
252 new_start = new_mem->start << PAGE_SHIFT;
253
254 switch (old_mem->mem_type) {
255 case TTM_PL_VRAM:
256 old_start += rdev->mc.vram_start;
257 break;
258 case TTM_PL_TT:
259 old_start += rdev->mc.gtt_start;
260 break;
261 default:
262 DRM_ERROR("Unknown placement %d\n", old_mem->mem_type);
263 return -EINVAL;
264 }
265 switch (new_mem->mem_type) {
266 case TTM_PL_VRAM:
267 new_start += rdev->mc.vram_start;
268 break;
269 case TTM_PL_TT:
270 new_start += rdev->mc.gtt_start;
271 break;
272 default:
273 DRM_ERROR("Unknown placement %d\n", old_mem->mem_type);
274 return -EINVAL;
275 }
276 if (!rdev->cp.ready) {
277 DRM_ERROR("Trying to move memory with CP turned off.\n");
278 return -EINVAL;
279 }
280
281 BUILD_BUG_ON((PAGE_SIZE % RADEON_GPU_PAGE_SIZE) != 0);
282
283 r = radeon_copy(rdev, old_start, new_start,
284 new_mem->num_pages * (PAGE_SIZE / RADEON_GPU_PAGE_SIZE), /* GPU pages */
285 fence);
286 /* FIXME: handle copy error */
287 r = ttm_bo_move_accel_cleanup(bo, (void *)fence, NULL,
288 evict, no_wait_reserve, no_wait_gpu, new_mem);
289 radeon_fence_unref(&fence);
290 return r;
291}
292
293static int radeon_move_vram_ram(struct ttm_buffer_object *bo,
294 bool evict, bool interruptible,
295 bool no_wait_reserve, bool no_wait_gpu,
296 struct ttm_mem_reg *new_mem)
297{
298 struct radeon_device *rdev;
299 struct ttm_mem_reg *old_mem = &bo->mem;
300 struct ttm_mem_reg tmp_mem;
301 u32 placements;
302 struct ttm_placement placement;
303 int r;
304
305 rdev = radeon_get_rdev(bo->bdev);
306 tmp_mem = *new_mem;
307 tmp_mem.mm_node = NULL;
308 placement.fpfn = 0;
309 placement.lpfn = 0;
310 placement.num_placement = 1;
311 placement.placement = &placements;
312 placement.num_busy_placement = 1;
313 placement.busy_placement = &placements;
314 placements = TTM_PL_MASK_CACHING | TTM_PL_FLAG_TT;
315 r = ttm_bo_mem_space(bo, &placement, &tmp_mem,
316 interruptible, no_wait_reserve, no_wait_gpu);
317 if (unlikely(r)) {
318 return r;
319 }
320
321 r = ttm_tt_set_placement_caching(bo->ttm, tmp_mem.placement);
322 if (unlikely(r)) {
323 goto out_cleanup;
324 }
325
326 r = ttm_tt_bind(bo->ttm, &tmp_mem);
327 if (unlikely(r)) {
328 goto out_cleanup;
329 }
330 r = radeon_move_blit(bo, true, no_wait_reserve, no_wait_gpu, &tmp_mem, old_mem);
331 if (unlikely(r)) {
332 goto out_cleanup;
333 }
334 r = ttm_bo_move_ttm(bo, true, no_wait_reserve, no_wait_gpu, new_mem);
335out_cleanup:
336 ttm_bo_mem_put(bo, &tmp_mem);
337 return r;
338}
339
340static int radeon_move_ram_vram(struct ttm_buffer_object *bo,
341 bool evict, bool interruptible,
342 bool no_wait_reserve, bool no_wait_gpu,
343 struct ttm_mem_reg *new_mem)
344{
345 struct radeon_device *rdev;
346 struct ttm_mem_reg *old_mem = &bo->mem;
347 struct ttm_mem_reg tmp_mem;
348 struct ttm_placement placement;
349 u32 placements;
350 int r;
351
352 rdev = radeon_get_rdev(bo->bdev);
353 tmp_mem = *new_mem;
354 tmp_mem.mm_node = NULL;
355 placement.fpfn = 0;
356 placement.lpfn = 0;
357 placement.num_placement = 1;
358 placement.placement = &placements;
359 placement.num_busy_placement = 1;
360 placement.busy_placement = &placements;
361 placements = TTM_PL_MASK_CACHING | TTM_PL_FLAG_TT;
362 r = ttm_bo_mem_space(bo, &placement, &tmp_mem, interruptible, no_wait_reserve, no_wait_gpu);
363 if (unlikely(r)) {
364 return r;
365 }
366 r = ttm_bo_move_ttm(bo, true, no_wait_reserve, no_wait_gpu, &tmp_mem);
367 if (unlikely(r)) {
368 goto out_cleanup;
369 }
370 r = radeon_move_blit(bo, true, no_wait_reserve, no_wait_gpu, new_mem, old_mem);
371 if (unlikely(r)) {
372 goto out_cleanup;
373 }
374out_cleanup:
375 ttm_bo_mem_put(bo, &tmp_mem);
376 return r;
377}
378
379static int radeon_bo_move(struct ttm_buffer_object *bo,
380 bool evict, bool interruptible,
381 bool no_wait_reserve, bool no_wait_gpu,
382 struct ttm_mem_reg *new_mem)
383{
384 struct radeon_device *rdev;
385 struct ttm_mem_reg *old_mem = &bo->mem;
386 int r;
387
388 rdev = radeon_get_rdev(bo->bdev);
389 if (old_mem->mem_type == TTM_PL_SYSTEM && bo->ttm == NULL) {
390 radeon_move_null(bo, new_mem);
391 return 0;
392 }
393 if ((old_mem->mem_type == TTM_PL_TT &&
394 new_mem->mem_type == TTM_PL_SYSTEM) ||
395 (old_mem->mem_type == TTM_PL_SYSTEM &&
396 new_mem->mem_type == TTM_PL_TT)) {
397 /* bind is enough */
398 radeon_move_null(bo, new_mem);
399 return 0;
400 }
401 if (!rdev->cp.ready || rdev->asic->copy == NULL) {
402 /* use memcpy */
403 goto memcpy;
404 }
405
406 if (old_mem->mem_type == TTM_PL_VRAM &&
407 new_mem->mem_type == TTM_PL_SYSTEM) {
408 r = radeon_move_vram_ram(bo, evict, interruptible,
409 no_wait_reserve, no_wait_gpu, new_mem);
410 } else if (old_mem->mem_type == TTM_PL_SYSTEM &&
411 new_mem->mem_type == TTM_PL_VRAM) {
412 r = radeon_move_ram_vram(bo, evict, interruptible,
413 no_wait_reserve, no_wait_gpu, new_mem);
414 } else {
415 r = radeon_move_blit(bo, evict, no_wait_reserve, no_wait_gpu, new_mem, old_mem);
416 }
417
418 if (r) {
419memcpy:
420 r = ttm_bo_move_memcpy(bo, evict, no_wait_reserve, no_wait_gpu, new_mem);
421 }
422 return r;
423}
424
425static int radeon_ttm_io_mem_reserve(struct ttm_bo_device *bdev, struct ttm_mem_reg *mem)
426{
427 struct ttm_mem_type_manager *man = &bdev->man[mem->mem_type];
428 struct radeon_device *rdev = radeon_get_rdev(bdev);
429
430 mem->bus.addr = NULL;
431 mem->bus.offset = 0;
432 mem->bus.size = mem->num_pages << PAGE_SHIFT;
433 mem->bus.base = 0;
434 mem->bus.is_iomem = false;
435 if (!(man->flags & TTM_MEMTYPE_FLAG_MAPPABLE))
436 return -EINVAL;
437 switch (mem->mem_type) {
438 case TTM_PL_SYSTEM:
439 /* system memory */
440 return 0;
441 case TTM_PL_TT:
442#if __OS_HAS_AGP
443 if (rdev->flags & RADEON_IS_AGP) {
444 /* RADEON_IS_AGP is set only if AGP is active */
445 mem->bus.offset = mem->start << PAGE_SHIFT;
446 mem->bus.base = rdev->mc.agp_base;
447 mem->bus.is_iomem = !rdev->ddev->agp->cant_use_aperture;
448 }
449#endif
450 break;
451 case TTM_PL_VRAM:
452 mem->bus.offset = mem->start << PAGE_SHIFT;
453 /* check if it's visible */
454 if ((mem->bus.offset + mem->bus.size) > rdev->mc.visible_vram_size)
455 return -EINVAL;
456 mem->bus.base = rdev->mc.aper_base;
457 mem->bus.is_iomem = true;
458#ifdef __alpha__
459 /*
460 * Alpha: use bus.addr to hold the ioremap() return,
461 * so we can modify bus.base below.
462 */
463 if (mem->placement & TTM_PL_FLAG_WC)
464 mem->bus.addr =
465 ioremap_wc(mem->bus.base + mem->bus.offset,
466 mem->bus.size);
467 else
468 mem->bus.addr =
469 ioremap_nocache(mem->bus.base + mem->bus.offset,
470 mem->bus.size);
471
472 /*
473 * Alpha: Use just the bus offset plus
474 * the hose/domain memory base for bus.base.
475 * It then can be used to build PTEs for VRAM
476 * access, as done in ttm_bo_vm_fault().
477 */
478 mem->bus.base = (mem->bus.base & 0x0ffffffffUL) +
479 rdev->ddev->hose->dense_mem_base;
480#endif
481 break;
482 default:
483 return -EINVAL;
484 }
485 return 0;
486}
487
488static void radeon_ttm_io_mem_free(struct ttm_bo_device *bdev, struct ttm_mem_reg *mem)
489{
490}
491
492static int radeon_sync_obj_wait(void *sync_obj, void *sync_arg,
493 bool lazy, bool interruptible)
494{
495 return radeon_fence_wait((struct radeon_fence *)sync_obj, interruptible);
496}
497
498static int radeon_sync_obj_flush(void *sync_obj, void *sync_arg)
499{
500 return 0;
501}
502
503static void radeon_sync_obj_unref(void **sync_obj)
504{
505 radeon_fence_unref((struct radeon_fence **)sync_obj);
506}
507
508static void *radeon_sync_obj_ref(void *sync_obj)
509{
510 return radeon_fence_ref((struct radeon_fence *)sync_obj);
511}
512
513static bool radeon_sync_obj_signaled(void *sync_obj, void *sync_arg)
514{
515 return radeon_fence_signaled((struct radeon_fence *)sync_obj);
516}
517
518static struct ttm_bo_driver radeon_bo_driver = {
519 .create_ttm_backend_entry = &radeon_create_ttm_backend_entry,
520 .invalidate_caches = &radeon_invalidate_caches,
521 .init_mem_type = &radeon_init_mem_type,
522 .evict_flags = &radeon_evict_flags,
523 .move = &radeon_bo_move,
524 .verify_access = &radeon_verify_access,
525 .sync_obj_signaled = &radeon_sync_obj_signaled,
526 .sync_obj_wait = &radeon_sync_obj_wait,
527 .sync_obj_flush = &radeon_sync_obj_flush,
528 .sync_obj_unref = &radeon_sync_obj_unref,
529 .sync_obj_ref = &radeon_sync_obj_ref,
530 .move_notify = &radeon_bo_move_notify,
531 .fault_reserve_notify = &radeon_bo_fault_reserve_notify,
532 .io_mem_reserve = &radeon_ttm_io_mem_reserve,
533 .io_mem_free = &radeon_ttm_io_mem_free,
534};
535
536int radeon_ttm_init(struct radeon_device *rdev)
537{
538 int r;
539
540 r = radeon_ttm_global_init(rdev);
541 if (r) {
542 return r;
543 }
544 /* No others user of address space so set it to 0 */
545 r = ttm_bo_device_init(&rdev->mman.bdev,
546 rdev->mman.bo_global_ref.ref.object,
547 &radeon_bo_driver, DRM_FILE_PAGE_OFFSET,
548 rdev->need_dma32);
549 if (r) {
550 DRM_ERROR("failed initializing buffer object driver(%d).\n", r);
551 return r;
552 }
553 rdev->mman.initialized = true;
554 r = ttm_bo_init_mm(&rdev->mman.bdev, TTM_PL_VRAM,
555 rdev->mc.real_vram_size >> PAGE_SHIFT);
556 if (r) {
557 DRM_ERROR("Failed initializing VRAM heap.\n");
558 return r;
559 }
560 r = radeon_bo_create(rdev, 256 * 1024, PAGE_SIZE, true,
561 RADEON_GEM_DOMAIN_VRAM,
562 &rdev->stollen_vga_memory);
563 if (r) {
564 return r;
565 }
566 r = radeon_bo_reserve(rdev->stollen_vga_memory, false);
567 if (r)
568 return r;
569 r = radeon_bo_pin(rdev->stollen_vga_memory, RADEON_GEM_DOMAIN_VRAM, NULL);
570 radeon_bo_unreserve(rdev->stollen_vga_memory);
571 if (r) {
572 radeon_bo_unref(&rdev->stollen_vga_memory);
573 return r;
574 }
575 DRM_INFO("radeon: %uM of VRAM memory ready\n",
576 (unsigned)rdev->mc.real_vram_size / (1024 * 1024));
577 r = ttm_bo_init_mm(&rdev->mman.bdev, TTM_PL_TT,
578 rdev->mc.gtt_size >> PAGE_SHIFT);
579 if (r) {
580 DRM_ERROR("Failed initializing GTT heap.\n");
581 return r;
582 }
583 DRM_INFO("radeon: %uM of GTT memory ready.\n",
584 (unsigned)(rdev->mc.gtt_size / (1024 * 1024)));
585 if (unlikely(rdev->mman.bdev.dev_mapping == NULL)) {
586 rdev->mman.bdev.dev_mapping = rdev->ddev->dev_mapping;
587 }
588
589 r = radeon_ttm_debugfs_init(rdev);
590 if (r) {
591 DRM_ERROR("Failed to init debugfs\n");
592 return r;
593 }
594 return 0;
595}
596
597void radeon_ttm_fini(struct radeon_device *rdev)
598{
599 int r;
600
601 if (!rdev->mman.initialized)
602 return;
603 if (rdev->stollen_vga_memory) {
604 r = radeon_bo_reserve(rdev->stollen_vga_memory, false);
605 if (r == 0) {
606 radeon_bo_unpin(rdev->stollen_vga_memory);
607 radeon_bo_unreserve(rdev->stollen_vga_memory);
608 }
609 radeon_bo_unref(&rdev->stollen_vga_memory);
610 }
611 ttm_bo_clean_mm(&rdev->mman.bdev, TTM_PL_VRAM);
612 ttm_bo_clean_mm(&rdev->mman.bdev, TTM_PL_TT);
613 ttm_bo_device_release(&rdev->mman.bdev);
614 radeon_gart_fini(rdev);
615 radeon_ttm_global_fini(rdev);
616 rdev->mman.initialized = false;
617 DRM_INFO("radeon: ttm finalized\n");
618}
619
620/* this should only be called at bootup or when userspace
621 * isn't running */
622void radeon_ttm_set_active_vram_size(struct radeon_device *rdev, u64 size)
623{
624 struct ttm_mem_type_manager *man;
625
626 if (!rdev->mman.initialized)
627 return;
628
629 man = &rdev->mman.bdev.man[TTM_PL_VRAM];
630 /* this just adjusts TTM size idea, which sets lpfn to the correct value */
631 man->size = size >> PAGE_SHIFT;
632}
633
634static struct vm_operations_struct radeon_ttm_vm_ops;
635static const struct vm_operations_struct *ttm_vm_ops = NULL;
636
637static int radeon_ttm_fault(struct vm_area_struct *vma, struct vm_fault *vmf)
638{
639 struct ttm_buffer_object *bo;
640 struct radeon_device *rdev;
641 int r;
642
643 bo = (struct ttm_buffer_object *)vma->vm_private_data;
644 if (bo == NULL) {
645 return VM_FAULT_NOPAGE;
646 }
647 rdev = radeon_get_rdev(bo->bdev);
648 mutex_lock(&rdev->vram_mutex);
649 r = ttm_vm_ops->fault(vma, vmf);
650 mutex_unlock(&rdev->vram_mutex);
651 return r;
652}
653
654int radeon_mmap(struct file *filp, struct vm_area_struct *vma)
655{
656 struct drm_file *file_priv;
657 struct radeon_device *rdev;
658 int r;
659
660 if (unlikely(vma->vm_pgoff < DRM_FILE_PAGE_OFFSET)) {
661 return drm_mmap(filp, vma);
662 }
663
664 file_priv = filp->private_data;
665 rdev = file_priv->minor->dev->dev_private;
666 if (rdev == NULL) {
667 return -EINVAL;
668 }
669 r = ttm_bo_mmap(filp, vma, &rdev->mman.bdev);
670 if (unlikely(r != 0)) {
671 return r;
672 }
673 if (unlikely(ttm_vm_ops == NULL)) {
674 ttm_vm_ops = vma->vm_ops;
675 radeon_ttm_vm_ops = *ttm_vm_ops;
676 radeon_ttm_vm_ops.fault = &radeon_ttm_fault;
677 }
678 vma->vm_ops = &radeon_ttm_vm_ops;
679 return 0;
680}
681
682
683/*
684 * TTM backend functions.
685 */
686struct radeon_ttm_backend {
687 struct ttm_backend backend;
688 struct radeon_device *rdev;
689 unsigned long num_pages;
690 struct page **pages;
691 struct page *dummy_read_page;
692 dma_addr_t *dma_addrs;
693 bool populated;
694 bool bound;
695 unsigned offset;
696};
697
698static int radeon_ttm_backend_populate(struct ttm_backend *backend,
699 unsigned long num_pages,
700 struct page **pages,
701 struct page *dummy_read_page,
702 dma_addr_t *dma_addrs)
703{
704 struct radeon_ttm_backend *gtt;
705
706 gtt = container_of(backend, struct radeon_ttm_backend, backend);
707 gtt->pages = pages;
708 gtt->dma_addrs = dma_addrs;
709 gtt->num_pages = num_pages;
710 gtt->dummy_read_page = dummy_read_page;
711 gtt->populated = true;
712 return 0;
713}
714
715static void radeon_ttm_backend_clear(struct ttm_backend *backend)
716{
717 struct radeon_ttm_backend *gtt;
718
719 gtt = container_of(backend, struct radeon_ttm_backend, backend);
720 gtt->pages = NULL;
721 gtt->dma_addrs = NULL;
722 gtt->num_pages = 0;
723 gtt->dummy_read_page = NULL;
724 gtt->populated = false;
725 gtt->bound = false;
726}
727
728
729static int radeon_ttm_backend_bind(struct ttm_backend *backend,
730 struct ttm_mem_reg *bo_mem)
731{
732 struct radeon_ttm_backend *gtt;
733 int r;
734
735 gtt = container_of(backend, struct radeon_ttm_backend, backend);
736 gtt->offset = bo_mem->start << PAGE_SHIFT;
737 if (!gtt->num_pages) {
738 WARN(1, "nothing to bind %lu pages for mreg %p back %p!\n",
739 gtt->num_pages, bo_mem, backend);
740 }
741 r = radeon_gart_bind(gtt->rdev, gtt->offset,
742 gtt->num_pages, gtt->pages, gtt->dma_addrs);
743 if (r) {
744 DRM_ERROR("failed to bind %lu pages at 0x%08X\n",
745 gtt->num_pages, gtt->offset);
746 return r;
747 }
748 gtt->bound = true;
749 return 0;
750}
751
752static int radeon_ttm_backend_unbind(struct ttm_backend *backend)
753{
754 struct radeon_ttm_backend *gtt;
755
756 gtt = container_of(backend, struct radeon_ttm_backend, backend);
757 radeon_gart_unbind(gtt->rdev, gtt->offset, gtt->num_pages);
758 gtt->bound = false;
759 return 0;
760}
761
762static void radeon_ttm_backend_destroy(struct ttm_backend *backend)
763{
764 struct radeon_ttm_backend *gtt;
765
766 gtt = container_of(backend, struct radeon_ttm_backend, backend);
767 if (gtt->bound) {
768 radeon_ttm_backend_unbind(backend);
769 }
770 kfree(gtt);
771}
772
773static struct ttm_backend_func radeon_backend_func = {
774 .populate = &radeon_ttm_backend_populate,
775 .clear = &radeon_ttm_backend_clear,
776 .bind = &radeon_ttm_backend_bind,
777 .unbind = &radeon_ttm_backend_unbind,
778 .destroy = &radeon_ttm_backend_destroy,
779};
780
781struct ttm_backend *radeon_ttm_backend_create(struct radeon_device *rdev)
782{
783 struct radeon_ttm_backend *gtt;
784
785 gtt = kzalloc(sizeof(struct radeon_ttm_backend), GFP_KERNEL);
786 if (gtt == NULL) {
787 return NULL;
788 }
789 gtt->backend.bdev = &rdev->mman.bdev;
790 gtt->backend.flags = 0;
791 gtt->backend.func = &radeon_backend_func;
792 gtt->rdev = rdev;
793 gtt->pages = NULL;
794 gtt->num_pages = 0;
795 gtt->dummy_read_page = NULL;
796 gtt->populated = false;
797 gtt->bound = false;
798 return >t->backend;
799}
800
801#define RADEON_DEBUGFS_MEM_TYPES 2
802
803#if defined(CONFIG_DEBUG_FS)
804static int radeon_mm_dump_table(struct seq_file *m, void *data)
805{
806 struct drm_info_node *node = (struct drm_info_node *)m->private;
807 struct drm_mm *mm = (struct drm_mm *)node->info_ent->data;
808 struct drm_device *dev = node->minor->dev;
809 struct radeon_device *rdev = dev->dev_private;
810 int ret;
811 struct ttm_bo_global *glob = rdev->mman.bdev.glob;
812
813 spin_lock(&glob->lru_lock);
814 ret = drm_mm_dump_table(m, mm);
815 spin_unlock(&glob->lru_lock);
816 return ret;
817}
818#endif
819
820static int radeon_ttm_debugfs_init(struct radeon_device *rdev)
821{
822#if defined(CONFIG_DEBUG_FS)
823 static struct drm_info_list radeon_mem_types_list[RADEON_DEBUGFS_MEM_TYPES+1];
824 static char radeon_mem_types_names[RADEON_DEBUGFS_MEM_TYPES+1][32];
825 unsigned i;
826
827 for (i = 0; i < RADEON_DEBUGFS_MEM_TYPES; i++) {
828 if (i == 0)
829 sprintf(radeon_mem_types_names[i], "radeon_vram_mm");
830 else
831 sprintf(radeon_mem_types_names[i], "radeon_gtt_mm");
832 radeon_mem_types_list[i].name = radeon_mem_types_names[i];
833 radeon_mem_types_list[i].show = &radeon_mm_dump_table;
834 radeon_mem_types_list[i].driver_features = 0;
835 if (i == 0)
836 radeon_mem_types_list[i].data = rdev->mman.bdev.man[TTM_PL_VRAM].priv;
837 else
838 radeon_mem_types_list[i].data = rdev->mman.bdev.man[TTM_PL_TT].priv;
839
840 }
841 /* Add ttm page pool to debugfs */
842 sprintf(radeon_mem_types_names[i], "ttm_page_pool");
843 radeon_mem_types_list[i].name = radeon_mem_types_names[i];
844 radeon_mem_types_list[i].show = &ttm_page_alloc_debugfs;
845 radeon_mem_types_list[i].driver_features = 0;
846 radeon_mem_types_list[i].data = NULL;
847 return radeon_debugfs_add_files(rdev, radeon_mem_types_list, RADEON_DEBUGFS_MEM_TYPES+1);
848
849#endif
850 return 0;
851}
1/*
2 * Copyright 2009 Jerome Glisse.
3 * All Rights Reserved.
4 *
5 * Permission is hereby granted, free of charge, to any person obtaining a
6 * copy of this software and associated documentation files (the
7 * "Software"), to deal in the Software without restriction, including
8 * without limitation the rights to use, copy, modify, merge, publish,
9 * distribute, sub license, and/or sell copies of the Software, and to
10 * permit persons to whom the Software is furnished to do so, subject to
11 * the following conditions:
12 *
13 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
14 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
15 * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL
16 * THE COPYRIGHT HOLDERS, AUTHORS AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM,
17 * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
18 * OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
19 * USE OR OTHER DEALINGS IN THE SOFTWARE.
20 *
21 * The above copyright notice and this permission notice (including the
22 * next paragraph) shall be included in all copies or substantial portions
23 * of the Software.
24 *
25 */
26/*
27 * Authors:
28 * Jerome Glisse <glisse@freedesktop.org>
29 * Thomas Hellstrom <thomas-at-tungstengraphics-dot-com>
30 * Dave Airlie
31 */
32
33#include <linux/dma-mapping.h>
34#include <linux/pagemap.h>
35#include <linux/pci.h>
36#include <linux/seq_file.h>
37#include <linux/slab.h>
38#include <linux/swap.h>
39#include <linux/swiotlb.h>
40
41#include <drm/drm_device.h>
42#include <drm/drm_file.h>
43#include <drm/drm_prime.h>
44#include <drm/radeon_drm.h>
45#include <drm/ttm/ttm_bo_api.h>
46#include <drm/ttm/ttm_bo_driver.h>
47#include <drm/ttm/ttm_placement.h>
48#include <drm/ttm/ttm_range_manager.h>
49
50#include "radeon_reg.h"
51#include "radeon.h"
52#include "radeon_ttm.h"
53
54static void radeon_ttm_debugfs_init(struct radeon_device *rdev);
55
56static int radeon_ttm_tt_bind(struct ttm_device *bdev, struct ttm_tt *ttm,
57 struct ttm_resource *bo_mem);
58static void radeon_ttm_tt_unbind(struct ttm_device *bdev, struct ttm_tt *ttm);
59
60struct radeon_device *radeon_get_rdev(struct ttm_device *bdev)
61{
62 struct radeon_mman *mman;
63 struct radeon_device *rdev;
64
65 mman = container_of(bdev, struct radeon_mman, bdev);
66 rdev = container_of(mman, struct radeon_device, mman);
67 return rdev;
68}
69
70static int radeon_ttm_init_vram(struct radeon_device *rdev)
71{
72 return ttm_range_man_init(&rdev->mman.bdev, TTM_PL_VRAM,
73 false, rdev->mc.real_vram_size >> PAGE_SHIFT);
74}
75
76static int radeon_ttm_init_gtt(struct radeon_device *rdev)
77{
78 return ttm_range_man_init(&rdev->mman.bdev, TTM_PL_TT,
79 true, rdev->mc.gtt_size >> PAGE_SHIFT);
80}
81
82static void radeon_evict_flags(struct ttm_buffer_object *bo,
83 struct ttm_placement *placement)
84{
85 static const struct ttm_place placements = {
86 .fpfn = 0,
87 .lpfn = 0,
88 .mem_type = TTM_PL_SYSTEM,
89 .flags = 0
90 };
91
92 struct radeon_bo *rbo;
93
94 if (!radeon_ttm_bo_is_radeon_bo(bo)) {
95 placement->placement = &placements;
96 placement->busy_placement = &placements;
97 placement->num_placement = 1;
98 placement->num_busy_placement = 1;
99 return;
100 }
101 rbo = container_of(bo, struct radeon_bo, tbo);
102 switch (bo->resource->mem_type) {
103 case TTM_PL_VRAM:
104 if (rbo->rdev->ring[radeon_copy_ring_index(rbo->rdev)].ready == false)
105 radeon_ttm_placement_from_domain(rbo, RADEON_GEM_DOMAIN_CPU);
106 else if (rbo->rdev->mc.visible_vram_size < rbo->rdev->mc.real_vram_size &&
107 bo->resource->start < (rbo->rdev->mc.visible_vram_size >> PAGE_SHIFT)) {
108 unsigned fpfn = rbo->rdev->mc.visible_vram_size >> PAGE_SHIFT;
109 int i;
110
111 /* Try evicting to the CPU inaccessible part of VRAM
112 * first, but only set GTT as busy placement, so this
113 * BO will be evicted to GTT rather than causing other
114 * BOs to be evicted from VRAM
115 */
116 radeon_ttm_placement_from_domain(rbo, RADEON_GEM_DOMAIN_VRAM |
117 RADEON_GEM_DOMAIN_GTT);
118 rbo->placement.num_busy_placement = 0;
119 for (i = 0; i < rbo->placement.num_placement; i++) {
120 if (rbo->placements[i].mem_type == TTM_PL_VRAM) {
121 if (rbo->placements[i].fpfn < fpfn)
122 rbo->placements[i].fpfn = fpfn;
123 } else {
124 rbo->placement.busy_placement =
125 &rbo->placements[i];
126 rbo->placement.num_busy_placement = 1;
127 }
128 }
129 } else
130 radeon_ttm_placement_from_domain(rbo, RADEON_GEM_DOMAIN_GTT);
131 break;
132 case TTM_PL_TT:
133 default:
134 radeon_ttm_placement_from_domain(rbo, RADEON_GEM_DOMAIN_CPU);
135 }
136 *placement = rbo->placement;
137}
138
139static int radeon_move_blit(struct ttm_buffer_object *bo,
140 bool evict,
141 struct ttm_resource *new_mem,
142 struct ttm_resource *old_mem)
143{
144 struct radeon_device *rdev;
145 uint64_t old_start, new_start;
146 struct radeon_fence *fence;
147 unsigned num_pages;
148 int r, ridx;
149
150 rdev = radeon_get_rdev(bo->bdev);
151 ridx = radeon_copy_ring_index(rdev);
152 old_start = (u64)old_mem->start << PAGE_SHIFT;
153 new_start = (u64)new_mem->start << PAGE_SHIFT;
154
155 switch (old_mem->mem_type) {
156 case TTM_PL_VRAM:
157 old_start += rdev->mc.vram_start;
158 break;
159 case TTM_PL_TT:
160 old_start += rdev->mc.gtt_start;
161 break;
162 default:
163 DRM_ERROR("Unknown placement %d\n", old_mem->mem_type);
164 return -EINVAL;
165 }
166 switch (new_mem->mem_type) {
167 case TTM_PL_VRAM:
168 new_start += rdev->mc.vram_start;
169 break;
170 case TTM_PL_TT:
171 new_start += rdev->mc.gtt_start;
172 break;
173 default:
174 DRM_ERROR("Unknown placement %d\n", old_mem->mem_type);
175 return -EINVAL;
176 }
177 if (!rdev->ring[ridx].ready) {
178 DRM_ERROR("Trying to move memory with ring turned off.\n");
179 return -EINVAL;
180 }
181
182 BUILD_BUG_ON((PAGE_SIZE % RADEON_GPU_PAGE_SIZE) != 0);
183
184 num_pages = PFN_UP(new_mem->size) * (PAGE_SIZE / RADEON_GPU_PAGE_SIZE);
185 fence = radeon_copy(rdev, old_start, new_start, num_pages, bo->base.resv);
186 if (IS_ERR(fence))
187 return PTR_ERR(fence);
188
189 r = ttm_bo_move_accel_cleanup(bo, &fence->base, evict, false, new_mem);
190 radeon_fence_unref(&fence);
191 return r;
192}
193
194static int radeon_bo_move(struct ttm_buffer_object *bo, bool evict,
195 struct ttm_operation_ctx *ctx,
196 struct ttm_resource *new_mem,
197 struct ttm_place *hop)
198{
199 struct ttm_resource *old_mem = bo->resource;
200 struct radeon_device *rdev;
201 struct radeon_bo *rbo;
202 int r;
203
204 if (new_mem->mem_type == TTM_PL_TT) {
205 r = radeon_ttm_tt_bind(bo->bdev, bo->ttm, new_mem);
206 if (r)
207 return r;
208 }
209
210 r = ttm_bo_wait_ctx(bo, ctx);
211 if (r)
212 return r;
213
214 /* Can't move a pinned BO */
215 rbo = container_of(bo, struct radeon_bo, tbo);
216 if (WARN_ON_ONCE(rbo->tbo.pin_count > 0))
217 return -EINVAL;
218
219 rdev = radeon_get_rdev(bo->bdev);
220 if (old_mem->mem_type == TTM_PL_SYSTEM && bo->ttm == NULL) {
221 ttm_bo_move_null(bo, new_mem);
222 goto out;
223 }
224 if (old_mem->mem_type == TTM_PL_SYSTEM &&
225 new_mem->mem_type == TTM_PL_TT) {
226 ttm_bo_move_null(bo, new_mem);
227 goto out;
228 }
229
230 if (old_mem->mem_type == TTM_PL_TT &&
231 new_mem->mem_type == TTM_PL_SYSTEM) {
232 radeon_ttm_tt_unbind(bo->bdev, bo->ttm);
233 ttm_resource_free(bo, &bo->resource);
234 ttm_bo_assign_mem(bo, new_mem);
235 goto out;
236 }
237 if (rdev->ring[radeon_copy_ring_index(rdev)].ready &&
238 rdev->asic->copy.copy != NULL) {
239 if ((old_mem->mem_type == TTM_PL_SYSTEM &&
240 new_mem->mem_type == TTM_PL_VRAM) ||
241 (old_mem->mem_type == TTM_PL_VRAM &&
242 new_mem->mem_type == TTM_PL_SYSTEM)) {
243 hop->fpfn = 0;
244 hop->lpfn = 0;
245 hop->mem_type = TTM_PL_TT;
246 hop->flags = 0;
247 return -EMULTIHOP;
248 }
249
250 r = radeon_move_blit(bo, evict, new_mem, old_mem);
251 } else {
252 r = -ENODEV;
253 }
254
255 if (r) {
256 r = ttm_bo_move_memcpy(bo, ctx, new_mem);
257 if (r)
258 return r;
259 }
260
261out:
262 /* update statistics */
263 atomic64_add(bo->base.size, &rdev->num_bytes_moved);
264 radeon_bo_move_notify(bo);
265 return 0;
266}
267
268static int radeon_ttm_io_mem_reserve(struct ttm_device *bdev, struct ttm_resource *mem)
269{
270 struct radeon_device *rdev = radeon_get_rdev(bdev);
271 size_t bus_size = (size_t)mem->size;
272
273 switch (mem->mem_type) {
274 case TTM_PL_SYSTEM:
275 /* system memory */
276 return 0;
277 case TTM_PL_TT:
278#if IS_ENABLED(CONFIG_AGP)
279 if (rdev->flags & RADEON_IS_AGP) {
280 /* RADEON_IS_AGP is set only if AGP is active */
281 mem->bus.offset = (mem->start << PAGE_SHIFT) +
282 rdev->mc.agp_base;
283 mem->bus.is_iomem = !rdev->agp->cant_use_aperture;
284 mem->bus.caching = ttm_write_combined;
285 }
286#endif
287 break;
288 case TTM_PL_VRAM:
289 mem->bus.offset = mem->start << PAGE_SHIFT;
290 /* check if it's visible */
291 if ((mem->bus.offset + bus_size) > rdev->mc.visible_vram_size)
292 return -EINVAL;
293 mem->bus.offset += rdev->mc.aper_base;
294 mem->bus.is_iomem = true;
295 mem->bus.caching = ttm_write_combined;
296#ifdef __alpha__
297 /*
298 * Alpha: use bus.addr to hold the ioremap() return,
299 * so we can modify bus.base below.
300 */
301 mem->bus.addr = ioremap_wc(mem->bus.offset, bus_size);
302 if (!mem->bus.addr)
303 return -ENOMEM;
304
305 /*
306 * Alpha: Use just the bus offset plus
307 * the hose/domain memory base for bus.base.
308 * It then can be used to build PTEs for VRAM
309 * access, as done in ttm_bo_vm_fault().
310 */
311 mem->bus.offset = (mem->bus.offset & 0x0ffffffffUL) +
312 rdev->hose->dense_mem_base;
313#endif
314 break;
315 default:
316 return -EINVAL;
317 }
318 return 0;
319}
320
321/*
322 * TTM backend functions.
323 */
324struct radeon_ttm_tt {
325 struct ttm_tt ttm;
326 u64 offset;
327
328 uint64_t userptr;
329 struct mm_struct *usermm;
330 uint32_t userflags;
331 bool bound;
332};
333
334/* prepare the sg table with the user pages */
335static int radeon_ttm_tt_pin_userptr(struct ttm_device *bdev, struct ttm_tt *ttm)
336{
337 struct radeon_device *rdev = radeon_get_rdev(bdev);
338 struct radeon_ttm_tt *gtt = (void *)ttm;
339 unsigned pinned = 0;
340 int r;
341
342 int write = !(gtt->userflags & RADEON_GEM_USERPTR_READONLY);
343 enum dma_data_direction direction = write ?
344 DMA_BIDIRECTIONAL : DMA_TO_DEVICE;
345
346 if (current->mm != gtt->usermm)
347 return -EPERM;
348
349 if (gtt->userflags & RADEON_GEM_USERPTR_ANONONLY) {
350 /* check that we only pin down anonymous memory
351 to prevent problems with writeback */
352 unsigned long end = gtt->userptr + (u64)ttm->num_pages * PAGE_SIZE;
353 struct vm_area_struct *vma;
354 vma = find_vma(gtt->usermm, gtt->userptr);
355 if (!vma || vma->vm_file || vma->vm_end < end)
356 return -EPERM;
357 }
358
359 do {
360 unsigned num_pages = ttm->num_pages - pinned;
361 uint64_t userptr = gtt->userptr + pinned * PAGE_SIZE;
362 struct page **pages = ttm->pages + pinned;
363
364 r = get_user_pages(userptr, num_pages, write ? FOLL_WRITE : 0,
365 pages, NULL);
366 if (r < 0)
367 goto release_pages;
368
369 pinned += r;
370
371 } while (pinned < ttm->num_pages);
372
373 r = sg_alloc_table_from_pages(ttm->sg, ttm->pages, ttm->num_pages, 0,
374 (u64)ttm->num_pages << PAGE_SHIFT,
375 GFP_KERNEL);
376 if (r)
377 goto release_sg;
378
379 r = dma_map_sgtable(rdev->dev, ttm->sg, direction, 0);
380 if (r)
381 goto release_sg;
382
383 drm_prime_sg_to_dma_addr_array(ttm->sg, gtt->ttm.dma_address,
384 ttm->num_pages);
385
386 return 0;
387
388release_sg:
389 kfree(ttm->sg);
390
391release_pages:
392 release_pages(ttm->pages, pinned);
393 return r;
394}
395
396static void radeon_ttm_tt_unpin_userptr(struct ttm_device *bdev, struct ttm_tt *ttm)
397{
398 struct radeon_device *rdev = radeon_get_rdev(bdev);
399 struct radeon_ttm_tt *gtt = (void *)ttm;
400 struct sg_page_iter sg_iter;
401
402 int write = !(gtt->userflags & RADEON_GEM_USERPTR_READONLY);
403 enum dma_data_direction direction = write ?
404 DMA_BIDIRECTIONAL : DMA_TO_DEVICE;
405
406 /* double check that we don't free the table twice */
407 if (!ttm->sg || !ttm->sg->sgl)
408 return;
409
410 /* free the sg table and pages again */
411 dma_unmap_sgtable(rdev->dev, ttm->sg, direction, 0);
412
413 for_each_sgtable_page(ttm->sg, &sg_iter, 0) {
414 struct page *page = sg_page_iter_page(&sg_iter);
415 if (!(gtt->userflags & RADEON_GEM_USERPTR_READONLY))
416 set_page_dirty(page);
417
418 mark_page_accessed(page);
419 put_page(page);
420 }
421
422 sg_free_table(ttm->sg);
423}
424
425static bool radeon_ttm_backend_is_bound(struct ttm_tt *ttm)
426{
427 struct radeon_ttm_tt *gtt = (void*)ttm;
428
429 return (gtt->bound);
430}
431
432static int radeon_ttm_backend_bind(struct ttm_device *bdev,
433 struct ttm_tt *ttm,
434 struct ttm_resource *bo_mem)
435{
436 struct radeon_ttm_tt *gtt = (void*)ttm;
437 struct radeon_device *rdev = radeon_get_rdev(bdev);
438 uint32_t flags = RADEON_GART_PAGE_VALID | RADEON_GART_PAGE_READ |
439 RADEON_GART_PAGE_WRITE;
440 int r;
441
442 if (gtt->bound)
443 return 0;
444
445 if (gtt->userptr) {
446 radeon_ttm_tt_pin_userptr(bdev, ttm);
447 flags &= ~RADEON_GART_PAGE_WRITE;
448 }
449
450 gtt->offset = (unsigned long)(bo_mem->start << PAGE_SHIFT);
451 if (!ttm->num_pages) {
452 WARN(1, "nothing to bind %u pages for mreg %p back %p!\n",
453 ttm->num_pages, bo_mem, ttm);
454 }
455 if (ttm->caching == ttm_cached)
456 flags |= RADEON_GART_PAGE_SNOOP;
457 r = radeon_gart_bind(rdev, gtt->offset, ttm->num_pages,
458 ttm->pages, gtt->ttm.dma_address, flags);
459 if (r) {
460 DRM_ERROR("failed to bind %u pages at 0x%08X\n",
461 ttm->num_pages, (unsigned)gtt->offset);
462 return r;
463 }
464 gtt->bound = true;
465 return 0;
466}
467
468static void radeon_ttm_backend_unbind(struct ttm_device *bdev, struct ttm_tt *ttm)
469{
470 struct radeon_ttm_tt *gtt = (void *)ttm;
471 struct radeon_device *rdev = radeon_get_rdev(bdev);
472
473 if (gtt->userptr)
474 radeon_ttm_tt_unpin_userptr(bdev, ttm);
475
476 if (!gtt->bound)
477 return;
478
479 radeon_gart_unbind(rdev, gtt->offset, ttm->num_pages);
480
481 gtt->bound = false;
482}
483
484static void radeon_ttm_backend_destroy(struct ttm_device *bdev, struct ttm_tt *ttm)
485{
486 struct radeon_ttm_tt *gtt = (void *)ttm;
487
488 ttm_tt_fini(>t->ttm);
489 kfree(gtt);
490}
491
492static struct ttm_tt *radeon_ttm_tt_create(struct ttm_buffer_object *bo,
493 uint32_t page_flags)
494{
495 struct radeon_ttm_tt *gtt;
496 enum ttm_caching caching;
497 struct radeon_bo *rbo;
498#if IS_ENABLED(CONFIG_AGP)
499 struct radeon_device *rdev = radeon_get_rdev(bo->bdev);
500
501 if (rdev->flags & RADEON_IS_AGP) {
502 return ttm_agp_tt_create(bo, rdev->agp->bridge, page_flags);
503 }
504#endif
505 rbo = container_of(bo, struct radeon_bo, tbo);
506
507 gtt = kzalloc(sizeof(struct radeon_ttm_tt), GFP_KERNEL);
508 if (gtt == NULL) {
509 return NULL;
510 }
511
512 if (rbo->flags & RADEON_GEM_GTT_UC)
513 caching = ttm_uncached;
514 else if (rbo->flags & RADEON_GEM_GTT_WC)
515 caching = ttm_write_combined;
516 else
517 caching = ttm_cached;
518
519 if (ttm_sg_tt_init(>t->ttm, bo, page_flags, caching)) {
520 kfree(gtt);
521 return NULL;
522 }
523 return >t->ttm;
524}
525
526static struct radeon_ttm_tt *radeon_ttm_tt_to_gtt(struct radeon_device *rdev,
527 struct ttm_tt *ttm)
528{
529#if IS_ENABLED(CONFIG_AGP)
530 if (rdev->flags & RADEON_IS_AGP)
531 return NULL;
532#endif
533
534 if (!ttm)
535 return NULL;
536 return container_of(ttm, struct radeon_ttm_tt, ttm);
537}
538
539static int radeon_ttm_tt_populate(struct ttm_device *bdev,
540 struct ttm_tt *ttm,
541 struct ttm_operation_ctx *ctx)
542{
543 struct radeon_device *rdev = radeon_get_rdev(bdev);
544 struct radeon_ttm_tt *gtt = radeon_ttm_tt_to_gtt(rdev, ttm);
545 bool slave = !!(ttm->page_flags & TTM_TT_FLAG_EXTERNAL);
546
547 if (gtt && gtt->userptr) {
548 ttm->sg = kzalloc(sizeof(struct sg_table), GFP_KERNEL);
549 if (!ttm->sg)
550 return -ENOMEM;
551
552 ttm->page_flags |= TTM_TT_FLAG_EXTERNAL;
553 return 0;
554 }
555
556 if (slave && ttm->sg) {
557 drm_prime_sg_to_dma_addr_array(ttm->sg, gtt->ttm.dma_address,
558 ttm->num_pages);
559 return 0;
560 }
561
562 return ttm_pool_alloc(&rdev->mman.bdev.pool, ttm, ctx);
563}
564
565static void radeon_ttm_tt_unpopulate(struct ttm_device *bdev, struct ttm_tt *ttm)
566{
567 struct radeon_device *rdev = radeon_get_rdev(bdev);
568 struct radeon_ttm_tt *gtt = radeon_ttm_tt_to_gtt(rdev, ttm);
569 bool slave = !!(ttm->page_flags & TTM_TT_FLAG_EXTERNAL);
570
571 radeon_ttm_tt_unbind(bdev, ttm);
572
573 if (gtt && gtt->userptr) {
574 kfree(ttm->sg);
575 ttm->page_flags &= ~TTM_TT_FLAG_EXTERNAL;
576 return;
577 }
578
579 if (slave)
580 return;
581
582 return ttm_pool_free(&rdev->mman.bdev.pool, ttm);
583}
584
585int radeon_ttm_tt_set_userptr(struct radeon_device *rdev,
586 struct ttm_tt *ttm, uint64_t addr,
587 uint32_t flags)
588{
589 struct radeon_ttm_tt *gtt = radeon_ttm_tt_to_gtt(rdev, ttm);
590
591 if (gtt == NULL)
592 return -EINVAL;
593
594 gtt->userptr = addr;
595 gtt->usermm = current->mm;
596 gtt->userflags = flags;
597 return 0;
598}
599
600bool radeon_ttm_tt_is_bound(struct ttm_device *bdev,
601 struct ttm_tt *ttm)
602{
603#if IS_ENABLED(CONFIG_AGP)
604 struct radeon_device *rdev = radeon_get_rdev(bdev);
605 if (rdev->flags & RADEON_IS_AGP)
606 return ttm_agp_is_bound(ttm);
607#endif
608 return radeon_ttm_backend_is_bound(ttm);
609}
610
611static int radeon_ttm_tt_bind(struct ttm_device *bdev,
612 struct ttm_tt *ttm,
613 struct ttm_resource *bo_mem)
614{
615#if IS_ENABLED(CONFIG_AGP)
616 struct radeon_device *rdev = radeon_get_rdev(bdev);
617#endif
618
619 if (!bo_mem)
620 return -EINVAL;
621#if IS_ENABLED(CONFIG_AGP)
622 if (rdev->flags & RADEON_IS_AGP)
623 return ttm_agp_bind(ttm, bo_mem);
624#endif
625
626 return radeon_ttm_backend_bind(bdev, ttm, bo_mem);
627}
628
629static void radeon_ttm_tt_unbind(struct ttm_device *bdev,
630 struct ttm_tt *ttm)
631{
632#if IS_ENABLED(CONFIG_AGP)
633 struct radeon_device *rdev = radeon_get_rdev(bdev);
634
635 if (rdev->flags & RADEON_IS_AGP) {
636 ttm_agp_unbind(ttm);
637 return;
638 }
639#endif
640 radeon_ttm_backend_unbind(bdev, ttm);
641}
642
643static void radeon_ttm_tt_destroy(struct ttm_device *bdev,
644 struct ttm_tt *ttm)
645{
646#if IS_ENABLED(CONFIG_AGP)
647 struct radeon_device *rdev = radeon_get_rdev(bdev);
648
649 if (rdev->flags & RADEON_IS_AGP) {
650 ttm_agp_destroy(ttm);
651 return;
652 }
653#endif
654 radeon_ttm_backend_destroy(bdev, ttm);
655}
656
657bool radeon_ttm_tt_has_userptr(struct radeon_device *rdev,
658 struct ttm_tt *ttm)
659{
660 struct radeon_ttm_tt *gtt = radeon_ttm_tt_to_gtt(rdev, ttm);
661
662 if (gtt == NULL)
663 return false;
664
665 return !!gtt->userptr;
666}
667
668bool radeon_ttm_tt_is_readonly(struct radeon_device *rdev,
669 struct ttm_tt *ttm)
670{
671 struct radeon_ttm_tt *gtt = radeon_ttm_tt_to_gtt(rdev, ttm);
672
673 if (gtt == NULL)
674 return false;
675
676 return !!(gtt->userflags & RADEON_GEM_USERPTR_READONLY);
677}
678
679static struct ttm_device_funcs radeon_bo_driver = {
680 .ttm_tt_create = &radeon_ttm_tt_create,
681 .ttm_tt_populate = &radeon_ttm_tt_populate,
682 .ttm_tt_unpopulate = &radeon_ttm_tt_unpopulate,
683 .ttm_tt_destroy = &radeon_ttm_tt_destroy,
684 .eviction_valuable = ttm_bo_eviction_valuable,
685 .evict_flags = &radeon_evict_flags,
686 .move = &radeon_bo_move,
687 .io_mem_reserve = &radeon_ttm_io_mem_reserve,
688};
689
690int radeon_ttm_init(struct radeon_device *rdev)
691{
692 int r;
693
694 /* No others user of address space so set it to 0 */
695 r = ttm_device_init(&rdev->mman.bdev, &radeon_bo_driver, rdev->dev,
696 rdev->ddev->anon_inode->i_mapping,
697 rdev->ddev->vma_offset_manager,
698 rdev->need_swiotlb,
699 dma_addressing_limited(&rdev->pdev->dev));
700 if (r) {
701 DRM_ERROR("failed initializing buffer object driver(%d).\n", r);
702 return r;
703 }
704 rdev->mman.initialized = true;
705
706 r = radeon_ttm_init_vram(rdev);
707 if (r) {
708 DRM_ERROR("Failed initializing VRAM heap.\n");
709 return r;
710 }
711 /* Change the size here instead of the init above so only lpfn is affected */
712 radeon_ttm_set_active_vram_size(rdev, rdev->mc.visible_vram_size);
713
714 r = radeon_bo_create(rdev, 256 * 1024, PAGE_SIZE, true,
715 RADEON_GEM_DOMAIN_VRAM, 0, NULL,
716 NULL, &rdev->stolen_vga_memory);
717 if (r) {
718 return r;
719 }
720 r = radeon_bo_reserve(rdev->stolen_vga_memory, false);
721 if (r)
722 return r;
723 r = radeon_bo_pin(rdev->stolen_vga_memory, RADEON_GEM_DOMAIN_VRAM, NULL);
724 radeon_bo_unreserve(rdev->stolen_vga_memory);
725 if (r) {
726 radeon_bo_unref(&rdev->stolen_vga_memory);
727 return r;
728 }
729 DRM_INFO("radeon: %uM of VRAM memory ready\n",
730 (unsigned) (rdev->mc.real_vram_size / (1024 * 1024)));
731
732 r = radeon_ttm_init_gtt(rdev);
733 if (r) {
734 DRM_ERROR("Failed initializing GTT heap.\n");
735 return r;
736 }
737 DRM_INFO("radeon: %uM of GTT memory ready.\n",
738 (unsigned)(rdev->mc.gtt_size / (1024 * 1024)));
739
740 radeon_ttm_debugfs_init(rdev);
741
742 return 0;
743}
744
745void radeon_ttm_fini(struct radeon_device *rdev)
746{
747 int r;
748
749 if (!rdev->mman.initialized)
750 return;
751
752 if (rdev->stolen_vga_memory) {
753 r = radeon_bo_reserve(rdev->stolen_vga_memory, false);
754 if (r == 0) {
755 radeon_bo_unpin(rdev->stolen_vga_memory);
756 radeon_bo_unreserve(rdev->stolen_vga_memory);
757 }
758 radeon_bo_unref(&rdev->stolen_vga_memory);
759 }
760 ttm_range_man_fini(&rdev->mman.bdev, TTM_PL_VRAM);
761 ttm_range_man_fini(&rdev->mman.bdev, TTM_PL_TT);
762 ttm_device_fini(&rdev->mman.bdev);
763 radeon_gart_fini(rdev);
764 rdev->mman.initialized = false;
765 DRM_INFO("radeon: ttm finalized\n");
766}
767
768/* this should only be called at bootup or when userspace
769 * isn't running */
770void radeon_ttm_set_active_vram_size(struct radeon_device *rdev, u64 size)
771{
772 struct ttm_resource_manager *man;
773
774 if (!rdev->mman.initialized)
775 return;
776
777 man = ttm_manager_type(&rdev->mman.bdev, TTM_PL_VRAM);
778 /* this just adjusts TTM size idea, which sets lpfn to the correct value */
779 man->size = size >> PAGE_SHIFT;
780}
781
782#if defined(CONFIG_DEBUG_FS)
783
784static int radeon_ttm_page_pool_show(struct seq_file *m, void *data)
785{
786 struct radeon_device *rdev = (struct radeon_device *)m->private;
787
788 return ttm_pool_debugfs(&rdev->mman.bdev.pool, m);
789}
790
791DEFINE_SHOW_ATTRIBUTE(radeon_ttm_page_pool);
792
793static int radeon_ttm_vram_open(struct inode *inode, struct file *filep)
794{
795 struct radeon_device *rdev = inode->i_private;
796 i_size_write(inode, rdev->mc.mc_vram_size);
797 filep->private_data = inode->i_private;
798 return 0;
799}
800
801static ssize_t radeon_ttm_vram_read(struct file *f, char __user *buf,
802 size_t size, loff_t *pos)
803{
804 struct radeon_device *rdev = f->private_data;
805 ssize_t result = 0;
806 int r;
807
808 if (size & 0x3 || *pos & 0x3)
809 return -EINVAL;
810
811 while (size) {
812 unsigned long flags;
813 uint32_t value;
814
815 if (*pos >= rdev->mc.mc_vram_size)
816 return result;
817
818 spin_lock_irqsave(&rdev->mmio_idx_lock, flags);
819 WREG32(RADEON_MM_INDEX, ((uint32_t)*pos) | 0x80000000);
820 if (rdev->family >= CHIP_CEDAR)
821 WREG32(EVERGREEN_MM_INDEX_HI, *pos >> 31);
822 value = RREG32(RADEON_MM_DATA);
823 spin_unlock_irqrestore(&rdev->mmio_idx_lock, flags);
824
825 r = put_user(value, (uint32_t __user *)buf);
826 if (r)
827 return r;
828
829 result += 4;
830 buf += 4;
831 *pos += 4;
832 size -= 4;
833 }
834
835 return result;
836}
837
838static const struct file_operations radeon_ttm_vram_fops = {
839 .owner = THIS_MODULE,
840 .open = radeon_ttm_vram_open,
841 .read = radeon_ttm_vram_read,
842 .llseek = default_llseek
843};
844
845static int radeon_ttm_gtt_open(struct inode *inode, struct file *filep)
846{
847 struct radeon_device *rdev = inode->i_private;
848 i_size_write(inode, rdev->mc.gtt_size);
849 filep->private_data = inode->i_private;
850 return 0;
851}
852
853static ssize_t radeon_ttm_gtt_read(struct file *f, char __user *buf,
854 size_t size, loff_t *pos)
855{
856 struct radeon_device *rdev = f->private_data;
857 ssize_t result = 0;
858 int r;
859
860 while (size) {
861 loff_t p = *pos / PAGE_SIZE;
862 unsigned off = *pos & ~PAGE_MASK;
863 size_t cur_size = min_t(size_t, size, PAGE_SIZE - off);
864 struct page *page;
865 void *ptr;
866
867 if (p >= rdev->gart.num_cpu_pages)
868 return result;
869
870 page = rdev->gart.pages[p];
871 if (page) {
872 ptr = kmap_local_page(page);
873 ptr += off;
874
875 r = copy_to_user(buf, ptr, cur_size);
876 kunmap_local(ptr);
877 } else
878 r = clear_user(buf, cur_size);
879
880 if (r)
881 return -EFAULT;
882
883 result += cur_size;
884 buf += cur_size;
885 *pos += cur_size;
886 size -= cur_size;
887 }
888
889 return result;
890}
891
892static const struct file_operations radeon_ttm_gtt_fops = {
893 .owner = THIS_MODULE,
894 .open = radeon_ttm_gtt_open,
895 .read = radeon_ttm_gtt_read,
896 .llseek = default_llseek
897};
898
899#endif
900
901static void radeon_ttm_debugfs_init(struct radeon_device *rdev)
902{
903#if defined(CONFIG_DEBUG_FS)
904 struct drm_minor *minor = rdev->ddev->primary;
905 struct dentry *root = minor->debugfs_root;
906
907 debugfs_create_file("radeon_vram", 0444, root, rdev,
908 &radeon_ttm_vram_fops);
909 debugfs_create_file("radeon_gtt", 0444, root, rdev,
910 &radeon_ttm_gtt_fops);
911 debugfs_create_file("ttm_page_pool", 0444, root, rdev,
912 &radeon_ttm_page_pool_fops);
913 ttm_resource_manager_create_debugfs(ttm_manager_type(&rdev->mman.bdev,
914 TTM_PL_VRAM),
915 root, "radeon_vram_mm");
916 ttm_resource_manager_create_debugfs(ttm_manager_type(&rdev->mman.bdev,
917 TTM_PL_TT),
918 root, "radeon_gtt_mm");
919#endif
920}