Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/sparc-2.6
[linux-2.6.git] / drivers / gpu / drm / radeon / radeon_ttm.c
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 <drm/drmP.h>
37 #include <drm/radeon_drm.h>
38 #include <linux/seq_file.h>
39 #include "radeon_reg.h"
40 #include "radeon.h"
41
42 #define DRM_FILE_PAGE_OFFSET (0x100000000ULL >> PAGE_SHIFT)
43
44 static int radeon_ttm_debugfs_init(struct radeon_device *rdev);
45
46 static struct radeon_device *radeon_get_rdev(struct ttm_bo_device *bdev)
47 {
48         struct radeon_mman *mman;
49         struct radeon_device *rdev;
50
51         mman = container_of(bdev, struct radeon_mman, bdev);
52         rdev = container_of(mman, struct radeon_device, mman);
53         return rdev;
54 }
55
56
57 /*
58  * Global memory.
59  */
60 static int radeon_ttm_mem_global_init(struct ttm_global_reference *ref)
61 {
62         return ttm_mem_global_init(ref->object);
63 }
64
65 static void radeon_ttm_mem_global_release(struct ttm_global_reference *ref)
66 {
67         ttm_mem_global_release(ref->object);
68 }
69
70 static int radeon_ttm_global_init(struct radeon_device *rdev)
71 {
72         struct ttm_global_reference *global_ref;
73         int r;
74
75         rdev->mman.mem_global_referenced = false;
76         global_ref = &rdev->mman.mem_global_ref;
77         global_ref->global_type = TTM_GLOBAL_TTM_MEM;
78         global_ref->size = sizeof(struct ttm_mem_global);
79         global_ref->init = &radeon_ttm_mem_global_init;
80         global_ref->release = &radeon_ttm_mem_global_release;
81         r = ttm_global_item_ref(global_ref);
82         if (r != 0) {
83                 DRM_ERROR("Failed setting up TTM memory accounting "
84                           "subsystem.\n");
85                 return r;
86         }
87
88         rdev->mman.bo_global_ref.mem_glob =
89                 rdev->mman.mem_global_ref.object;
90         global_ref = &rdev->mman.bo_global_ref.ref;
91         global_ref->global_type = TTM_GLOBAL_TTM_BO;
92         global_ref->size = sizeof(struct ttm_bo_global);
93         global_ref->init = &ttm_bo_global_init;
94         global_ref->release = &ttm_bo_global_release;
95         r = ttm_global_item_ref(global_ref);
96         if (r != 0) {
97                 DRM_ERROR("Failed setting up TTM BO subsystem.\n");
98                 ttm_global_item_unref(&rdev->mman.mem_global_ref);
99                 return r;
100         }
101
102         rdev->mman.mem_global_referenced = true;
103         return 0;
104 }
105
106 static void radeon_ttm_global_fini(struct radeon_device *rdev)
107 {
108         if (rdev->mman.mem_global_referenced) {
109                 ttm_global_item_unref(&rdev->mman.bo_global_ref.ref);
110                 ttm_global_item_unref(&rdev->mman.mem_global_ref);
111                 rdev->mman.mem_global_referenced = false;
112         }
113 }
114
115 struct ttm_backend *radeon_ttm_backend_create(struct radeon_device *rdev);
116
117 static struct ttm_backend*
118 radeon_create_ttm_backend_entry(struct ttm_bo_device *bdev)
119 {
120         struct radeon_device *rdev;
121
122         rdev = radeon_get_rdev(bdev);
123 #if __OS_HAS_AGP
124         if (rdev->flags & RADEON_IS_AGP) {
125                 return ttm_agp_backend_init(bdev, rdev->ddev->agp->bridge);
126         } else
127 #endif
128         {
129                 return radeon_ttm_backend_create(rdev);
130         }
131 }
132
133 static int radeon_invalidate_caches(struct ttm_bo_device *bdev, uint32_t flags)
134 {
135         return 0;
136 }
137
138 static int radeon_init_mem_type(struct ttm_bo_device *bdev, uint32_t type,
139                                 struct ttm_mem_type_manager *man)
140 {
141         struct radeon_device *rdev;
142
143         rdev = radeon_get_rdev(bdev);
144
145         switch (type) {
146         case TTM_PL_SYSTEM:
147                 /* System memory */
148                 man->flags = TTM_MEMTYPE_FLAG_MAPPABLE;
149                 man->available_caching = TTM_PL_MASK_CACHING;
150                 man->default_caching = TTM_PL_FLAG_CACHED;
151                 break;
152         case TTM_PL_TT:
153                 man->gpu_offset = rdev->mc.gtt_start;
154                 man->available_caching = TTM_PL_MASK_CACHING;
155                 man->default_caching = TTM_PL_FLAG_CACHED;
156                 man->flags = TTM_MEMTYPE_FLAG_MAPPABLE | TTM_MEMTYPE_FLAG_CMA;
157 #if __OS_HAS_AGP
158                 if (rdev->flags & RADEON_IS_AGP) {
159                         if (!(drm_core_has_AGP(rdev->ddev) && rdev->ddev->agp)) {
160                                 DRM_ERROR("AGP is not enabled for memory type %u\n",
161                                           (unsigned)type);
162                                 return -EINVAL;
163                         }
164                         man->io_offset = rdev->mc.agp_base;
165                         man->io_size = rdev->mc.gtt_size;
166                         man->io_addr = NULL;
167                         if (!rdev->ddev->agp->cant_use_aperture)
168                                 man->flags = TTM_MEMTYPE_FLAG_NEEDS_IOREMAP |
169                                              TTM_MEMTYPE_FLAG_MAPPABLE;
170                         man->available_caching = TTM_PL_FLAG_UNCACHED |
171                                                  TTM_PL_FLAG_WC;
172                         man->default_caching = TTM_PL_FLAG_WC;
173                 } else
174 #endif
175                 {
176                         man->io_offset = 0;
177                         man->io_size = 0;
178                         man->io_addr = NULL;
179                 }
180                 break;
181         case TTM_PL_VRAM:
182                 /* "On-card" video ram */
183                 man->gpu_offset = rdev->mc.vram_start;
184                 man->flags = TTM_MEMTYPE_FLAG_FIXED |
185                              TTM_MEMTYPE_FLAG_NEEDS_IOREMAP |
186                              TTM_MEMTYPE_FLAG_MAPPABLE;
187                 man->available_caching = TTM_PL_FLAG_UNCACHED | TTM_PL_FLAG_WC;
188                 man->default_caching = TTM_PL_FLAG_WC;
189                 man->io_addr = NULL;
190                 man->io_offset = rdev->mc.aper_base;
191                 man->io_size = rdev->mc.aper_size;
192                 break;
193         default:
194                 DRM_ERROR("Unsupported memory type %u\n", (unsigned)type);
195                 return -EINVAL;
196         }
197         return 0;
198 }
199
200 static void radeon_evict_flags(struct ttm_buffer_object *bo,
201                                 struct ttm_placement *placement)
202 {
203         struct radeon_bo *rbo;
204         static u32 placements = TTM_PL_MASK_CACHING | TTM_PL_FLAG_SYSTEM;
205
206         if (!radeon_ttm_bo_is_radeon_bo(bo)) {
207                 placement->fpfn = 0;
208                 placement->lpfn = 0;
209                 placement->placement = &placements;
210                 placement->busy_placement = &placements;
211                 placement->num_placement = 1;
212                 placement->num_busy_placement = 1;
213                 return;
214         }
215         rbo = container_of(bo, struct radeon_bo, tbo);
216         switch (bo->mem.mem_type) {
217         case TTM_PL_VRAM:
218                 if (rbo->rdev->cp.ready == false)
219                         radeon_ttm_placement_from_domain(rbo, RADEON_GEM_DOMAIN_CPU);
220                 else
221                         radeon_ttm_placement_from_domain(rbo, RADEON_GEM_DOMAIN_GTT);
222                 break;
223         case TTM_PL_TT:
224         default:
225                 radeon_ttm_placement_from_domain(rbo, RADEON_GEM_DOMAIN_CPU);
226         }
227         *placement = rbo->placement;
228 }
229
230 static int radeon_verify_access(struct ttm_buffer_object *bo, struct file *filp)
231 {
232         return 0;
233 }
234
235 static void radeon_move_null(struct ttm_buffer_object *bo,
236                              struct ttm_mem_reg *new_mem)
237 {
238         struct ttm_mem_reg *old_mem = &bo->mem;
239
240         BUG_ON(old_mem->mm_node != NULL);
241         *old_mem = *new_mem;
242         new_mem->mm_node = NULL;
243 }
244
245 static int radeon_move_blit(struct ttm_buffer_object *bo,
246                             bool evict, int no_wait,
247                             struct ttm_mem_reg *new_mem,
248                             struct ttm_mem_reg *old_mem)
249 {
250         struct radeon_device *rdev;
251         uint64_t old_start, new_start;
252         struct radeon_fence *fence;
253         int r;
254
255         rdev = radeon_get_rdev(bo->bdev);
256         r = radeon_fence_create(rdev, &fence);
257         if (unlikely(r)) {
258                 return r;
259         }
260         old_start = old_mem->mm_node->start << PAGE_SHIFT;
261         new_start = new_mem->mm_node->start << PAGE_SHIFT;
262
263         switch (old_mem->mem_type) {
264         case TTM_PL_VRAM:
265                 old_start += rdev->mc.vram_start;
266                 break;
267         case TTM_PL_TT:
268                 old_start += rdev->mc.gtt_start;
269                 break;
270         default:
271                 DRM_ERROR("Unknown placement %d\n", old_mem->mem_type);
272                 return -EINVAL;
273         }
274         switch (new_mem->mem_type) {
275         case TTM_PL_VRAM:
276                 new_start += rdev->mc.vram_start;
277                 break;
278         case TTM_PL_TT:
279                 new_start += rdev->mc.gtt_start;
280                 break;
281         default:
282                 DRM_ERROR("Unknown placement %d\n", old_mem->mem_type);
283                 return -EINVAL;
284         }
285         if (!rdev->cp.ready) {
286                 DRM_ERROR("Trying to move memory with CP turned off.\n");
287                 return -EINVAL;
288         }
289         r = radeon_copy(rdev, old_start, new_start, new_mem->num_pages, fence);
290         /* FIXME: handle copy error */
291         r = ttm_bo_move_accel_cleanup(bo, (void *)fence, NULL,
292                                       evict, no_wait, new_mem);
293         radeon_fence_unref(&fence);
294         return r;
295 }
296
297 static int radeon_move_vram_ram(struct ttm_buffer_object *bo,
298                                 bool evict, bool interruptible, bool no_wait,
299                                 struct ttm_mem_reg *new_mem)
300 {
301         struct radeon_device *rdev;
302         struct ttm_mem_reg *old_mem = &bo->mem;
303         struct ttm_mem_reg tmp_mem;
304         u32 placements;
305         struct ttm_placement placement;
306         int r;
307
308         rdev = radeon_get_rdev(bo->bdev);
309         tmp_mem = *new_mem;
310         tmp_mem.mm_node = NULL;
311         placement.fpfn = 0;
312         placement.lpfn = 0;
313         placement.num_placement = 1;
314         placement.placement = &placements;
315         placement.num_busy_placement = 1;
316         placement.busy_placement = &placements;
317         placements = TTM_PL_MASK_CACHING | TTM_PL_FLAG_TT;
318         r = ttm_bo_mem_space(bo, &placement, &tmp_mem,
319                              interruptible, no_wait);
320         if (unlikely(r)) {
321                 return r;
322         }
323
324         r = ttm_tt_set_placement_caching(bo->ttm, tmp_mem.placement);
325         if (unlikely(r)) {
326                 goto out_cleanup;
327         }
328
329         r = ttm_tt_bind(bo->ttm, &tmp_mem);
330         if (unlikely(r)) {
331                 goto out_cleanup;
332         }
333         r = radeon_move_blit(bo, true, no_wait, &tmp_mem, old_mem);
334         if (unlikely(r)) {
335                 goto out_cleanup;
336         }
337         r = ttm_bo_move_ttm(bo, true, no_wait, new_mem);
338 out_cleanup:
339         if (tmp_mem.mm_node) {
340                 struct ttm_bo_global *glob = rdev->mman.bdev.glob;
341
342                 spin_lock(&glob->lru_lock);
343                 drm_mm_put_block(tmp_mem.mm_node);
344                 spin_unlock(&glob->lru_lock);
345                 return r;
346         }
347         return r;
348 }
349
350 static int radeon_move_ram_vram(struct ttm_buffer_object *bo,
351                                 bool evict, bool interruptible, bool no_wait,
352                                 struct ttm_mem_reg *new_mem)
353 {
354         struct radeon_device *rdev;
355         struct ttm_mem_reg *old_mem = &bo->mem;
356         struct ttm_mem_reg tmp_mem;
357         struct ttm_placement placement;
358         u32 placements;
359         int r;
360
361         rdev = radeon_get_rdev(bo->bdev);
362         tmp_mem = *new_mem;
363         tmp_mem.mm_node = NULL;
364         placement.fpfn = 0;
365         placement.lpfn = 0;
366         placement.num_placement = 1;
367         placement.placement = &placements;
368         placement.num_busy_placement = 1;
369         placement.busy_placement = &placements;
370         placements = TTM_PL_MASK_CACHING | TTM_PL_FLAG_TT;
371         r = ttm_bo_mem_space(bo, &placement, &tmp_mem, interruptible, no_wait);
372         if (unlikely(r)) {
373                 return r;
374         }
375         r = ttm_bo_move_ttm(bo, true, no_wait, &tmp_mem);
376         if (unlikely(r)) {
377                 goto out_cleanup;
378         }
379         r = radeon_move_blit(bo, true, no_wait, new_mem, old_mem);
380         if (unlikely(r)) {
381                 goto out_cleanup;
382         }
383 out_cleanup:
384         if (tmp_mem.mm_node) {
385                 struct ttm_bo_global *glob = rdev->mman.bdev.glob;
386
387                 spin_lock(&glob->lru_lock);
388                 drm_mm_put_block(tmp_mem.mm_node);
389                 spin_unlock(&glob->lru_lock);
390                 return r;
391         }
392         return r;
393 }
394
395 static int radeon_bo_move(struct ttm_buffer_object *bo,
396                           bool evict, bool interruptible, bool no_wait,
397                           struct ttm_mem_reg *new_mem)
398 {
399         struct radeon_device *rdev;
400         struct ttm_mem_reg *old_mem = &bo->mem;
401         int r;
402
403         rdev = radeon_get_rdev(bo->bdev);
404         if (old_mem->mem_type == TTM_PL_SYSTEM && bo->ttm == NULL) {
405                 radeon_move_null(bo, new_mem);
406                 return 0;
407         }
408         if ((old_mem->mem_type == TTM_PL_TT &&
409              new_mem->mem_type == TTM_PL_SYSTEM) ||
410             (old_mem->mem_type == TTM_PL_SYSTEM &&
411              new_mem->mem_type == TTM_PL_TT)) {
412                 /* bind is enough */
413                 radeon_move_null(bo, new_mem);
414                 return 0;
415         }
416         if (!rdev->cp.ready || rdev->asic->copy == NULL) {
417                 /* use memcpy */
418                 goto memcpy;
419         }
420
421         if (old_mem->mem_type == TTM_PL_VRAM &&
422             new_mem->mem_type == TTM_PL_SYSTEM) {
423                 r = radeon_move_vram_ram(bo, evict, interruptible,
424                                             no_wait, new_mem);
425         } else if (old_mem->mem_type == TTM_PL_SYSTEM &&
426                    new_mem->mem_type == TTM_PL_VRAM) {
427                 r = radeon_move_ram_vram(bo, evict, interruptible,
428                                             no_wait, new_mem);
429         } else {
430                 r = radeon_move_blit(bo, evict, no_wait, new_mem, old_mem);
431         }
432
433         if (r) {
434 memcpy:
435                 r = ttm_bo_move_memcpy(bo, evict, no_wait, new_mem);
436         }
437
438         return r;
439 }
440
441 static int radeon_sync_obj_wait(void *sync_obj, void *sync_arg,
442                                 bool lazy, bool interruptible)
443 {
444         return radeon_fence_wait((struct radeon_fence *)sync_obj, interruptible);
445 }
446
447 static int radeon_sync_obj_flush(void *sync_obj, void *sync_arg)
448 {
449         return 0;
450 }
451
452 static void radeon_sync_obj_unref(void **sync_obj)
453 {
454         radeon_fence_unref((struct radeon_fence **)sync_obj);
455 }
456
457 static void *radeon_sync_obj_ref(void *sync_obj)
458 {
459         return radeon_fence_ref((struct radeon_fence *)sync_obj);
460 }
461
462 static bool radeon_sync_obj_signaled(void *sync_obj, void *sync_arg)
463 {
464         return radeon_fence_signaled((struct radeon_fence *)sync_obj);
465 }
466
467 static struct ttm_bo_driver radeon_bo_driver = {
468         .create_ttm_backend_entry = &radeon_create_ttm_backend_entry,
469         .invalidate_caches = &radeon_invalidate_caches,
470         .init_mem_type = &radeon_init_mem_type,
471         .evict_flags = &radeon_evict_flags,
472         .move = &radeon_bo_move,
473         .verify_access = &radeon_verify_access,
474         .sync_obj_signaled = &radeon_sync_obj_signaled,
475         .sync_obj_wait = &radeon_sync_obj_wait,
476         .sync_obj_flush = &radeon_sync_obj_flush,
477         .sync_obj_unref = &radeon_sync_obj_unref,
478         .sync_obj_ref = &radeon_sync_obj_ref,
479         .move_notify = &radeon_bo_move_notify,
480         .fault_reserve_notify = &radeon_bo_fault_reserve_notify,
481 };
482
483 int radeon_ttm_init(struct radeon_device *rdev)
484 {
485         int r;
486
487         r = radeon_ttm_global_init(rdev);
488         if (r) {
489                 return r;
490         }
491         /* No others user of address space so set it to 0 */
492         r = ttm_bo_device_init(&rdev->mman.bdev,
493                                rdev->mman.bo_global_ref.ref.object,
494                                &radeon_bo_driver, DRM_FILE_PAGE_OFFSET,
495                                rdev->need_dma32);
496         if (r) {
497                 DRM_ERROR("failed initializing buffer object driver(%d).\n", r);
498                 return r;
499         }
500         rdev->mman.initialized = true;
501         r = ttm_bo_init_mm(&rdev->mman.bdev, TTM_PL_VRAM,
502                                 rdev->mc.real_vram_size >> PAGE_SHIFT);
503         if (r) {
504                 DRM_ERROR("Failed initializing VRAM heap.\n");
505                 return r;
506         }
507         r = radeon_bo_create(rdev, NULL, 256 * 1024, true,
508                                 RADEON_GEM_DOMAIN_VRAM,
509                                 &rdev->stollen_vga_memory);
510         if (r) {
511                 return r;
512         }
513         r = radeon_bo_reserve(rdev->stollen_vga_memory, false);
514         if (r)
515                 return r;
516         r = radeon_bo_pin(rdev->stollen_vga_memory, RADEON_GEM_DOMAIN_VRAM, NULL);
517         radeon_bo_unreserve(rdev->stollen_vga_memory);
518         if (r) {
519                 radeon_bo_unref(&rdev->stollen_vga_memory);
520                 return r;
521         }
522         DRM_INFO("radeon: %uM of VRAM memory ready\n",
523                  (unsigned)rdev->mc.real_vram_size / (1024 * 1024));
524         r = ttm_bo_init_mm(&rdev->mman.bdev, TTM_PL_TT,
525                                 rdev->mc.gtt_size >> PAGE_SHIFT);
526         if (r) {
527                 DRM_ERROR("Failed initializing GTT heap.\n");
528                 return r;
529         }
530         DRM_INFO("radeon: %uM of GTT memory ready.\n",
531                  (unsigned)(rdev->mc.gtt_size / (1024 * 1024)));
532         if (unlikely(rdev->mman.bdev.dev_mapping == NULL)) {
533                 rdev->mman.bdev.dev_mapping = rdev->ddev->dev_mapping;
534         }
535
536         r = radeon_ttm_debugfs_init(rdev);
537         if (r) {
538                 DRM_ERROR("Failed to init debugfs\n");
539                 return r;
540         }
541         return 0;
542 }
543
544 void radeon_ttm_fini(struct radeon_device *rdev)
545 {
546         int r;
547
548         if (!rdev->mman.initialized)
549                 return;
550         if (rdev->stollen_vga_memory) {
551                 r = radeon_bo_reserve(rdev->stollen_vga_memory, false);
552                 if (r == 0) {
553                         radeon_bo_unpin(rdev->stollen_vga_memory);
554                         radeon_bo_unreserve(rdev->stollen_vga_memory);
555                 }
556                 radeon_bo_unref(&rdev->stollen_vga_memory);
557         }
558         ttm_bo_clean_mm(&rdev->mman.bdev, TTM_PL_VRAM);
559         ttm_bo_clean_mm(&rdev->mman.bdev, TTM_PL_TT);
560         ttm_bo_device_release(&rdev->mman.bdev);
561         radeon_gart_fini(rdev);
562         radeon_ttm_global_fini(rdev);
563         rdev->mman.initialized = false;
564         DRM_INFO("radeon: ttm finalized\n");
565 }
566
567 static struct vm_operations_struct radeon_ttm_vm_ops;
568 static const struct vm_operations_struct *ttm_vm_ops = NULL;
569
570 static int radeon_ttm_fault(struct vm_area_struct *vma, struct vm_fault *vmf)
571 {
572         struct ttm_buffer_object *bo;
573         int r;
574
575         bo = (struct ttm_buffer_object *)vma->vm_private_data;
576         if (bo == NULL) {
577                 return VM_FAULT_NOPAGE;
578         }
579         r = ttm_vm_ops->fault(vma, vmf);
580         return r;
581 }
582
583 int radeon_mmap(struct file *filp, struct vm_area_struct *vma)
584 {
585         struct drm_file *file_priv;
586         struct radeon_device *rdev;
587         int r;
588
589         if (unlikely(vma->vm_pgoff < DRM_FILE_PAGE_OFFSET)) {
590                 return drm_mmap(filp, vma);
591         }
592
593         file_priv = (struct drm_file *)filp->private_data;
594         rdev = file_priv->minor->dev->dev_private;
595         if (rdev == NULL) {
596                 return -EINVAL;
597         }
598         r = ttm_bo_mmap(filp, vma, &rdev->mman.bdev);
599         if (unlikely(r != 0)) {
600                 return r;
601         }
602         if (unlikely(ttm_vm_ops == NULL)) {
603                 ttm_vm_ops = vma->vm_ops;
604                 radeon_ttm_vm_ops = *ttm_vm_ops;
605                 radeon_ttm_vm_ops.fault = &radeon_ttm_fault;
606         }
607         vma->vm_ops = &radeon_ttm_vm_ops;
608         return 0;
609 }
610
611
612 /*
613  * TTM backend functions.
614  */
615 struct radeon_ttm_backend {
616         struct ttm_backend              backend;
617         struct radeon_device            *rdev;
618         unsigned long                   num_pages;
619         struct page                     **pages;
620         struct page                     *dummy_read_page;
621         bool                            populated;
622         bool                            bound;
623         unsigned                        offset;
624 };
625
626 static int radeon_ttm_backend_populate(struct ttm_backend *backend,
627                                        unsigned long num_pages,
628                                        struct page **pages,
629                                        struct page *dummy_read_page)
630 {
631         struct radeon_ttm_backend *gtt;
632
633         gtt = container_of(backend, struct radeon_ttm_backend, backend);
634         gtt->pages = pages;
635         gtt->num_pages = num_pages;
636         gtt->dummy_read_page = dummy_read_page;
637         gtt->populated = true;
638         return 0;
639 }
640
641 static void radeon_ttm_backend_clear(struct ttm_backend *backend)
642 {
643         struct radeon_ttm_backend *gtt;
644
645         gtt = container_of(backend, struct radeon_ttm_backend, backend);
646         gtt->pages = NULL;
647         gtt->num_pages = 0;
648         gtt->dummy_read_page = NULL;
649         gtt->populated = false;
650         gtt->bound = false;
651 }
652
653
654 static int radeon_ttm_backend_bind(struct ttm_backend *backend,
655                                    struct ttm_mem_reg *bo_mem)
656 {
657         struct radeon_ttm_backend *gtt;
658         int r;
659
660         gtt = container_of(backend, struct radeon_ttm_backend, backend);
661         gtt->offset = bo_mem->mm_node->start << PAGE_SHIFT;
662         if (!gtt->num_pages) {
663                 WARN(1, "nothing to bind %lu pages for mreg %p back %p!\n", gtt->num_pages, bo_mem, backend);
664         }
665         r = radeon_gart_bind(gtt->rdev, gtt->offset,
666                              gtt->num_pages, gtt->pages);
667         if (r) {
668                 DRM_ERROR("failed to bind %lu pages at 0x%08X\n",
669                           gtt->num_pages, gtt->offset);
670                 return r;
671         }
672         gtt->bound = true;
673         return 0;
674 }
675
676 static int radeon_ttm_backend_unbind(struct ttm_backend *backend)
677 {
678         struct radeon_ttm_backend *gtt;
679
680         gtt = container_of(backend, struct radeon_ttm_backend, backend);
681         radeon_gart_unbind(gtt->rdev, gtt->offset, gtt->num_pages);
682         gtt->bound = false;
683         return 0;
684 }
685
686 static void radeon_ttm_backend_destroy(struct ttm_backend *backend)
687 {
688         struct radeon_ttm_backend *gtt;
689
690         gtt = container_of(backend, struct radeon_ttm_backend, backend);
691         if (gtt->bound) {
692                 radeon_ttm_backend_unbind(backend);
693         }
694         kfree(gtt);
695 }
696
697 static struct ttm_backend_func radeon_backend_func = {
698         .populate = &radeon_ttm_backend_populate,
699         .clear = &radeon_ttm_backend_clear,
700         .bind = &radeon_ttm_backend_bind,
701         .unbind = &radeon_ttm_backend_unbind,
702         .destroy = &radeon_ttm_backend_destroy,
703 };
704
705 struct ttm_backend *radeon_ttm_backend_create(struct radeon_device *rdev)
706 {
707         struct radeon_ttm_backend *gtt;
708
709         gtt = kzalloc(sizeof(struct radeon_ttm_backend), GFP_KERNEL);
710         if (gtt == NULL) {
711                 return NULL;
712         }
713         gtt->backend.bdev = &rdev->mman.bdev;
714         gtt->backend.flags = 0;
715         gtt->backend.func = &radeon_backend_func;
716         gtt->rdev = rdev;
717         gtt->pages = NULL;
718         gtt->num_pages = 0;
719         gtt->dummy_read_page = NULL;
720         gtt->populated = false;
721         gtt->bound = false;
722         return &gtt->backend;
723 }
724
725 #define RADEON_DEBUGFS_MEM_TYPES 2
726
727 #if defined(CONFIG_DEBUG_FS)
728 static int radeon_mm_dump_table(struct seq_file *m, void *data)
729 {
730         struct drm_info_node *node = (struct drm_info_node *)m->private;
731         struct drm_mm *mm = (struct drm_mm *)node->info_ent->data;
732         struct drm_device *dev = node->minor->dev;
733         struct radeon_device *rdev = dev->dev_private;
734         int ret;
735         struct ttm_bo_global *glob = rdev->mman.bdev.glob;
736
737         spin_lock(&glob->lru_lock);
738         ret = drm_mm_dump_table(m, mm);
739         spin_unlock(&glob->lru_lock);
740         return ret;
741 }
742 #endif
743
744 static int radeon_ttm_debugfs_init(struct radeon_device *rdev)
745 {
746 #if defined(CONFIG_DEBUG_FS)
747         static struct drm_info_list radeon_mem_types_list[RADEON_DEBUGFS_MEM_TYPES];
748         static char radeon_mem_types_names[RADEON_DEBUGFS_MEM_TYPES][32];
749         unsigned i;
750
751         for (i = 0; i < RADEON_DEBUGFS_MEM_TYPES; i++) {
752                 if (i == 0)
753                         sprintf(radeon_mem_types_names[i], "radeon_vram_mm");
754                 else
755                         sprintf(radeon_mem_types_names[i], "radeon_gtt_mm");
756                 radeon_mem_types_list[i].name = radeon_mem_types_names[i];
757                 radeon_mem_types_list[i].show = &radeon_mm_dump_table;
758                 radeon_mem_types_list[i].driver_features = 0;
759                 if (i == 0)
760                         radeon_mem_types_list[i].data = &rdev->mman.bdev.man[TTM_PL_VRAM].manager;
761                 else
762                         radeon_mem_types_list[i].data = &rdev->mman.bdev.man[TTM_PL_TT].manager;
763
764         }
765         return radeon_debugfs_add_files(rdev, radeon_mem_types_list, RADEON_DEBUGFS_MEM_TYPES);
766
767 #endif
768         return 0;
769 }