GNU Linux-libre 4.9.306-gnu1
[releases.git] / drivers / gpu / drm / ast / ast_ttm.c
1 /*
2  * Copyright 2012 Red Hat Inc.
3  *
4  * Permission is hereby granted, free of charge, to any person obtaining a
5  * copy of this software and associated documentation files (the
6  * "Software"), to deal in the Software without restriction, including
7  * without limitation the rights to use, copy, modify, merge, publish,
8  * distribute, sub license, and/or sell copies of the Software, and to
9  * permit persons to whom the Software is furnished to do so, subject to
10  * the following conditions:
11  *
12  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
13  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
14  * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL
15  * THE COPYRIGHT HOLDERS, AUTHORS AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM,
16  * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
17  * OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
18  * USE OR OTHER DEALINGS IN THE SOFTWARE.
19  *
20  * The above copyright notice and this permission notice (including the
21  * next paragraph) shall be included in all copies or substantial portions
22  * of the Software.
23  *
24  */
25 /*
26  * Authors: Dave Airlie <airlied@redhat.com>
27  */
28 #include <drm/drmP.h>
29 #include "ast_drv.h"
30 #include <ttm/ttm_page_alloc.h>
31
32 static inline struct ast_private *
33 ast_bdev(struct ttm_bo_device *bd)
34 {
35         return container_of(bd, struct ast_private, ttm.bdev);
36 }
37
38 static int
39 ast_ttm_mem_global_init(struct drm_global_reference *ref)
40 {
41         return ttm_mem_global_init(ref->object);
42 }
43
44 static void
45 ast_ttm_mem_global_release(struct drm_global_reference *ref)
46 {
47         ttm_mem_global_release(ref->object);
48 }
49
50 static int ast_ttm_global_init(struct ast_private *ast)
51 {
52         struct drm_global_reference *global_ref;
53         int r;
54
55         global_ref = &ast->ttm.mem_global_ref;
56         global_ref->global_type = DRM_GLOBAL_TTM_MEM;
57         global_ref->size = sizeof(struct ttm_mem_global);
58         global_ref->init = &ast_ttm_mem_global_init;
59         global_ref->release = &ast_ttm_mem_global_release;
60         r = drm_global_item_ref(global_ref);
61         if (r != 0) {
62                 DRM_ERROR("Failed setting up TTM memory accounting "
63                           "subsystem.\n");
64                 return r;
65         }
66
67         ast->ttm.bo_global_ref.mem_glob =
68                 ast->ttm.mem_global_ref.object;
69         global_ref = &ast->ttm.bo_global_ref.ref;
70         global_ref->global_type = DRM_GLOBAL_TTM_BO;
71         global_ref->size = sizeof(struct ttm_bo_global);
72         global_ref->init = &ttm_bo_global_init;
73         global_ref->release = &ttm_bo_global_release;
74         r = drm_global_item_ref(global_ref);
75         if (r != 0) {
76                 DRM_ERROR("Failed setting up TTM BO subsystem.\n");
77                 drm_global_item_unref(&ast->ttm.mem_global_ref);
78                 return r;
79         }
80         return 0;
81 }
82
83 static void
84 ast_ttm_global_release(struct ast_private *ast)
85 {
86         if (ast->ttm.mem_global_ref.release == NULL)
87                 return;
88
89         drm_global_item_unref(&ast->ttm.bo_global_ref.ref);
90         drm_global_item_unref(&ast->ttm.mem_global_ref);
91         ast->ttm.mem_global_ref.release = NULL;
92 }
93
94
95 static void ast_bo_ttm_destroy(struct ttm_buffer_object *tbo)
96 {
97         struct ast_bo *bo;
98
99         bo = container_of(tbo, struct ast_bo, bo);
100
101         drm_gem_object_release(&bo->gem);
102         kfree(bo);
103 }
104
105 static bool ast_ttm_bo_is_ast_bo(struct ttm_buffer_object *bo)
106 {
107         if (bo->destroy == &ast_bo_ttm_destroy)
108                 return true;
109         return false;
110 }
111
112 static int
113 ast_bo_init_mem_type(struct ttm_bo_device *bdev, uint32_t type,
114                      struct ttm_mem_type_manager *man)
115 {
116         switch (type) {
117         case TTM_PL_SYSTEM:
118                 man->flags = TTM_MEMTYPE_FLAG_MAPPABLE;
119                 man->available_caching = TTM_PL_MASK_CACHING;
120                 man->default_caching = TTM_PL_FLAG_CACHED;
121                 break;
122         case TTM_PL_VRAM:
123                 man->func = &ttm_bo_manager_func;
124                 man->flags = TTM_MEMTYPE_FLAG_FIXED |
125                         TTM_MEMTYPE_FLAG_MAPPABLE;
126                 man->available_caching = TTM_PL_FLAG_UNCACHED |
127                         TTM_PL_FLAG_WC;
128                 man->default_caching = TTM_PL_FLAG_WC;
129                 break;
130         default:
131                 DRM_ERROR("Unsupported memory type %u\n", (unsigned)type);
132                 return -EINVAL;
133         }
134         return 0;
135 }
136
137 static void
138 ast_bo_evict_flags(struct ttm_buffer_object *bo, struct ttm_placement *pl)
139 {
140         struct ast_bo *astbo = ast_bo(bo);
141
142         if (!ast_ttm_bo_is_ast_bo(bo))
143                 return;
144
145         ast_ttm_placement(astbo, TTM_PL_FLAG_SYSTEM);
146         *pl = astbo->placement;
147 }
148
149 static int ast_bo_verify_access(struct ttm_buffer_object *bo, struct file *filp)
150 {
151         struct ast_bo *astbo = ast_bo(bo);
152
153         return drm_vma_node_verify_access(&astbo->gem.vma_node,
154                                           filp->private_data);
155 }
156
157 static int ast_ttm_io_mem_reserve(struct ttm_bo_device *bdev,
158                                   struct ttm_mem_reg *mem)
159 {
160         struct ttm_mem_type_manager *man = &bdev->man[mem->mem_type];
161         struct ast_private *ast = ast_bdev(bdev);
162
163         mem->bus.addr = NULL;
164         mem->bus.offset = 0;
165         mem->bus.size = mem->num_pages << PAGE_SHIFT;
166         mem->bus.base = 0;
167         mem->bus.is_iomem = false;
168         if (!(man->flags & TTM_MEMTYPE_FLAG_MAPPABLE))
169                 return -EINVAL;
170         switch (mem->mem_type) {
171         case TTM_PL_SYSTEM:
172                 /* system memory */
173                 return 0;
174         case TTM_PL_VRAM:
175                 mem->bus.offset = mem->start << PAGE_SHIFT;
176                 mem->bus.base = pci_resource_start(ast->dev->pdev, 0);
177                 mem->bus.is_iomem = true;
178                 break;
179         default:
180                 return -EINVAL;
181                 break;
182         }
183         return 0;
184 }
185
186 static void ast_ttm_io_mem_free(struct ttm_bo_device *bdev, struct ttm_mem_reg *mem)
187 {
188 }
189
190 static void ast_ttm_backend_destroy(struct ttm_tt *tt)
191 {
192         ttm_tt_fini(tt);
193         kfree(tt);
194 }
195
196 static struct ttm_backend_func ast_tt_backend_func = {
197         .destroy = &ast_ttm_backend_destroy,
198 };
199
200
201 static struct ttm_tt *ast_ttm_tt_create(struct ttm_bo_device *bdev,
202                                  unsigned long size, uint32_t page_flags,
203                                  struct page *dummy_read_page)
204 {
205         struct ttm_tt *tt;
206
207         tt = kzalloc(sizeof(struct ttm_tt), GFP_KERNEL);
208         if (tt == NULL)
209                 return NULL;
210         tt->func = &ast_tt_backend_func;
211         if (ttm_tt_init(tt, bdev, size, page_flags, dummy_read_page)) {
212                 kfree(tt);
213                 return NULL;
214         }
215         return tt;
216 }
217
218 static int ast_ttm_tt_populate(struct ttm_tt *ttm)
219 {
220         return ttm_pool_populate(ttm);
221 }
222
223 static void ast_ttm_tt_unpopulate(struct ttm_tt *ttm)
224 {
225         ttm_pool_unpopulate(ttm);
226 }
227
228 struct ttm_bo_driver ast_bo_driver = {
229         .ttm_tt_create = ast_ttm_tt_create,
230         .ttm_tt_populate = ast_ttm_tt_populate,
231         .ttm_tt_unpopulate = ast_ttm_tt_unpopulate,
232         .init_mem_type = ast_bo_init_mem_type,
233         .evict_flags = ast_bo_evict_flags,
234         .move = NULL,
235         .verify_access = ast_bo_verify_access,
236         .io_mem_reserve = &ast_ttm_io_mem_reserve,
237         .io_mem_free = &ast_ttm_io_mem_free,
238         .lru_tail = &ttm_bo_default_lru_tail,
239         .swap_lru_tail = &ttm_bo_default_swap_lru_tail,
240 };
241
242 int ast_mm_init(struct ast_private *ast)
243 {
244         int ret;
245         struct drm_device *dev = ast->dev;
246         struct ttm_bo_device *bdev = &ast->ttm.bdev;
247
248         ret = ast_ttm_global_init(ast);
249         if (ret)
250                 return ret;
251
252         ret = ttm_bo_device_init(&ast->ttm.bdev,
253                                  ast->ttm.bo_global_ref.ref.object,
254                                  &ast_bo_driver,
255                                  dev->anon_inode->i_mapping,
256                                  DRM_FILE_PAGE_OFFSET,
257                                  true);
258         if (ret) {
259                 DRM_ERROR("Error initialising bo driver; %d\n", ret);
260                 return ret;
261         }
262
263         ret = ttm_bo_init_mm(bdev, TTM_PL_VRAM,
264                              ast->vram_size >> PAGE_SHIFT);
265         if (ret) {
266                 DRM_ERROR("Failed ttm VRAM init: %d\n", ret);
267                 return ret;
268         }
269
270         arch_io_reserve_memtype_wc(pci_resource_start(dev->pdev, 0),
271                                    pci_resource_len(dev->pdev, 0));
272         ast->fb_mtrr = arch_phys_wc_add(pci_resource_start(dev->pdev, 0),
273                                         pci_resource_len(dev->pdev, 0));
274
275         return 0;
276 }
277
278 void ast_mm_fini(struct ast_private *ast)
279 {
280         struct drm_device *dev = ast->dev;
281
282         ttm_bo_device_release(&ast->ttm.bdev);
283
284         ast_ttm_global_release(ast);
285
286         arch_phys_wc_del(ast->fb_mtrr);
287         arch_io_free_memtype_wc(pci_resource_start(dev->pdev, 0),
288                                 pci_resource_len(dev->pdev, 0));
289 }
290
291 void ast_ttm_placement(struct ast_bo *bo, int domain)
292 {
293         u32 c = 0;
294         unsigned i;
295
296         bo->placement.placement = bo->placements;
297         bo->placement.busy_placement = bo->placements;
298         if (domain & TTM_PL_FLAG_VRAM)
299                 bo->placements[c++].flags = TTM_PL_FLAG_WC | TTM_PL_FLAG_UNCACHED | TTM_PL_FLAG_VRAM;
300         if (domain & TTM_PL_FLAG_SYSTEM)
301                 bo->placements[c++].flags = TTM_PL_FLAG_CACHED | TTM_PL_FLAG_SYSTEM;
302         if (!c)
303                 bo->placements[c++].flags = TTM_PL_FLAG_CACHED | TTM_PL_FLAG_SYSTEM;
304         bo->placement.num_placement = c;
305         bo->placement.num_busy_placement = c;
306         for (i = 0; i < c; ++i) {
307                 bo->placements[i].fpfn = 0;
308                 bo->placements[i].lpfn = 0;
309         }
310 }
311
312 int ast_bo_create(struct drm_device *dev, int size, int align,
313                   uint32_t flags, struct ast_bo **pastbo)
314 {
315         struct ast_private *ast = dev->dev_private;
316         struct ast_bo *astbo;
317         size_t acc_size;
318         int ret;
319
320         astbo = kzalloc(sizeof(struct ast_bo), GFP_KERNEL);
321         if (!astbo)
322                 return -ENOMEM;
323
324         ret = drm_gem_object_init(dev, &astbo->gem, size);
325         if (ret) {
326                 kfree(astbo);
327                 return ret;
328         }
329
330         astbo->bo.bdev = &ast->ttm.bdev;
331
332         ast_ttm_placement(astbo, TTM_PL_FLAG_VRAM | TTM_PL_FLAG_SYSTEM);
333
334         acc_size = ttm_bo_dma_acc_size(&ast->ttm.bdev, size,
335                                        sizeof(struct ast_bo));
336
337         ret = ttm_bo_init(&ast->ttm.bdev, &astbo->bo, size,
338                           ttm_bo_type_device, &astbo->placement,
339                           align >> PAGE_SHIFT, false, NULL, acc_size,
340                           NULL, NULL, ast_bo_ttm_destroy);
341         if (ret)
342                 return ret;
343
344         *pastbo = astbo;
345         return 0;
346 }
347
348 static inline u64 ast_bo_gpu_offset(struct ast_bo *bo)
349 {
350         return bo->bo.offset;
351 }
352
353 int ast_bo_pin(struct ast_bo *bo, u32 pl_flag, u64 *gpu_addr)
354 {
355         int i, ret;
356
357         if (bo->pin_count) {
358                 bo->pin_count++;
359                 if (gpu_addr)
360                         *gpu_addr = ast_bo_gpu_offset(bo);
361         }
362
363         ast_ttm_placement(bo, pl_flag);
364         for (i = 0; i < bo->placement.num_placement; i++)
365                 bo->placements[i].flags |= TTM_PL_FLAG_NO_EVICT;
366         ret = ttm_bo_validate(&bo->bo, &bo->placement, false, false);
367         if (ret)
368                 return ret;
369
370         bo->pin_count = 1;
371         if (gpu_addr)
372                 *gpu_addr = ast_bo_gpu_offset(bo);
373         return 0;
374 }
375
376 int ast_bo_unpin(struct ast_bo *bo)
377 {
378         int i, ret;
379         if (!bo->pin_count) {
380                 DRM_ERROR("unpin bad %p\n", bo);
381                 return 0;
382         }
383         bo->pin_count--;
384         if (bo->pin_count)
385                 return 0;
386
387         for (i = 0; i < bo->placement.num_placement ; i++)
388                 bo->placements[i].flags &= ~TTM_PL_FLAG_NO_EVICT;
389         ret = ttm_bo_validate(&bo->bo, &bo->placement, false, false);
390         if (ret)
391                 return ret;
392
393         return 0;
394 }
395
396 int ast_bo_push_sysram(struct ast_bo *bo)
397 {
398         int i, ret;
399         if (!bo->pin_count) {
400                 DRM_ERROR("unpin bad %p\n", bo);
401                 return 0;
402         }
403         bo->pin_count--;
404         if (bo->pin_count)
405                 return 0;
406
407         if (bo->kmap.virtual)
408                 ttm_bo_kunmap(&bo->kmap);
409
410         ast_ttm_placement(bo, TTM_PL_FLAG_SYSTEM);
411         for (i = 0; i < bo->placement.num_placement ; i++)
412                 bo->placements[i].flags |= TTM_PL_FLAG_NO_EVICT;
413
414         ret = ttm_bo_validate(&bo->bo, &bo->placement, false, false);
415         if (ret) {
416                 DRM_ERROR("pushing to VRAM failed\n");
417                 return ret;
418         }
419         return 0;
420 }
421
422 int ast_mmap(struct file *filp, struct vm_area_struct *vma)
423 {
424         struct drm_file *file_priv;
425         struct ast_private *ast;
426
427         if (unlikely(vma->vm_pgoff < DRM_FILE_PAGE_OFFSET))
428                 return -EINVAL;
429
430         file_priv = filp->private_data;
431         ast = file_priv->minor->dev->dev_private;
432         return ttm_bo_mmap(filp, vma, &ast->ttm.bdev);
433 }