Loading...
Note: File does not exist in v5.9.
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
32static inline struct ast_private *
33ast_bdev(struct ttm_bo_device *bd)
34{
35 return container_of(bd, struct ast_private, ttm.bdev);
36}
37
38static int
39ast_ttm_mem_global_init(struct drm_global_reference *ref)
40{
41 return ttm_mem_global_init(ref->object);
42}
43
44static void
45ast_ttm_mem_global_release(struct drm_global_reference *ref)
46{
47 ttm_mem_global_release(ref->object);
48}
49
50static 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
83static void
84ast_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
95static 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
105static 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
112static int
113ast_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
137static void
138ast_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
149static 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
157static 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
186static void ast_ttm_io_mem_free(struct ttm_bo_device *bdev, struct ttm_mem_reg *mem)
187{
188}
189
190static void ast_ttm_backend_destroy(struct ttm_tt *tt)
191{
192 ttm_tt_fini(tt);
193 kfree(tt);
194}
195
196static struct ttm_backend_func ast_tt_backend_func = {
197 .destroy = &ast_ttm_backend_destroy,
198};
199
200
201static 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
218static int ast_ttm_tt_populate(struct ttm_tt *ttm)
219{
220 return ttm_pool_populate(ttm);
221}
222
223static void ast_ttm_tt_unpopulate(struct ttm_tt *ttm)
224{
225 ttm_pool_unpopulate(ttm);
226}
227
228struct 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 .eviction_valuable = ttm_bo_eviction_valuable,
234 .evict_flags = ast_bo_evict_flags,
235 .move = NULL,
236 .verify_access = ast_bo_verify_access,
237 .io_mem_reserve = &ast_ttm_io_mem_reserve,
238 .io_mem_free = &ast_ttm_io_mem_free,
239 .lru_tail = &ttm_bo_default_lru_tail,
240 .swap_lru_tail = &ttm_bo_default_swap_lru_tail,
241};
242
243int ast_mm_init(struct ast_private *ast)
244{
245 int ret;
246 struct drm_device *dev = ast->dev;
247 struct ttm_bo_device *bdev = &ast->ttm.bdev;
248
249 ret = ast_ttm_global_init(ast);
250 if (ret)
251 return ret;
252
253 ret = ttm_bo_device_init(&ast->ttm.bdev,
254 ast->ttm.bo_global_ref.ref.object,
255 &ast_bo_driver,
256 dev->anon_inode->i_mapping,
257 DRM_FILE_PAGE_OFFSET,
258 true);
259 if (ret) {
260 DRM_ERROR("Error initialising bo driver; %d\n", ret);
261 return ret;
262 }
263
264 ret = ttm_bo_init_mm(bdev, TTM_PL_VRAM,
265 ast->vram_size >> PAGE_SHIFT);
266 if (ret) {
267 DRM_ERROR("Failed ttm VRAM init: %d\n", ret);
268 return ret;
269 }
270
271 arch_io_reserve_memtype_wc(pci_resource_start(dev->pdev, 0),
272 pci_resource_len(dev->pdev, 0));
273 ast->fb_mtrr = arch_phys_wc_add(pci_resource_start(dev->pdev, 0),
274 pci_resource_len(dev->pdev, 0));
275
276 return 0;
277}
278
279void ast_mm_fini(struct ast_private *ast)
280{
281 struct drm_device *dev = ast->dev;
282
283 ttm_bo_device_release(&ast->ttm.bdev);
284
285 ast_ttm_global_release(ast);
286
287 arch_phys_wc_del(ast->fb_mtrr);
288 arch_io_free_memtype_wc(pci_resource_start(dev->pdev, 0),
289 pci_resource_len(dev->pdev, 0));
290}
291
292void ast_ttm_placement(struct ast_bo *bo, int domain)
293{
294 u32 c = 0;
295 unsigned i;
296
297 bo->placement.placement = bo->placements;
298 bo->placement.busy_placement = bo->placements;
299 if (domain & TTM_PL_FLAG_VRAM)
300 bo->placements[c++].flags = TTM_PL_FLAG_WC | TTM_PL_FLAG_UNCACHED | TTM_PL_FLAG_VRAM;
301 if (domain & TTM_PL_FLAG_SYSTEM)
302 bo->placements[c++].flags = TTM_PL_FLAG_CACHED | TTM_PL_FLAG_SYSTEM;
303 if (!c)
304 bo->placements[c++].flags = TTM_PL_FLAG_CACHED | TTM_PL_FLAG_SYSTEM;
305 bo->placement.num_placement = c;
306 bo->placement.num_busy_placement = c;
307 for (i = 0; i < c; ++i) {
308 bo->placements[i].fpfn = 0;
309 bo->placements[i].lpfn = 0;
310 }
311}
312
313int ast_bo_create(struct drm_device *dev, int size, int align,
314 uint32_t flags, struct ast_bo **pastbo)
315{
316 struct ast_private *ast = dev->dev_private;
317 struct ast_bo *astbo;
318 size_t acc_size;
319 int ret;
320
321 astbo = kzalloc(sizeof(struct ast_bo), GFP_KERNEL);
322 if (!astbo)
323 return -ENOMEM;
324
325 ret = drm_gem_object_init(dev, &astbo->gem, size);
326 if (ret) {
327 kfree(astbo);
328 return ret;
329 }
330
331 astbo->bo.bdev = &ast->ttm.bdev;
332
333 ast_ttm_placement(astbo, TTM_PL_FLAG_VRAM | TTM_PL_FLAG_SYSTEM);
334
335 acc_size = ttm_bo_dma_acc_size(&ast->ttm.bdev, size,
336 sizeof(struct ast_bo));
337
338 ret = ttm_bo_init(&ast->ttm.bdev, &astbo->bo, size,
339 ttm_bo_type_device, &astbo->placement,
340 align >> PAGE_SHIFT, false, NULL, acc_size,
341 NULL, NULL, ast_bo_ttm_destroy);
342 if (ret)
343 return ret;
344
345 *pastbo = astbo;
346 return 0;
347}
348
349static inline u64 ast_bo_gpu_offset(struct ast_bo *bo)
350{
351 return bo->bo.offset;
352}
353
354int ast_bo_pin(struct ast_bo *bo, u32 pl_flag, u64 *gpu_addr)
355{
356 int i, ret;
357
358 if (bo->pin_count) {
359 bo->pin_count++;
360 if (gpu_addr)
361 *gpu_addr = ast_bo_gpu_offset(bo);
362 }
363
364 ast_ttm_placement(bo, pl_flag);
365 for (i = 0; i < bo->placement.num_placement; i++)
366 bo->placements[i].flags |= TTM_PL_FLAG_NO_EVICT;
367 ret = ttm_bo_validate(&bo->bo, &bo->placement, false, false);
368 if (ret)
369 return ret;
370
371 bo->pin_count = 1;
372 if (gpu_addr)
373 *gpu_addr = ast_bo_gpu_offset(bo);
374 return 0;
375}
376
377int ast_bo_unpin(struct ast_bo *bo)
378{
379 int i, ret;
380 if (!bo->pin_count) {
381 DRM_ERROR("unpin bad %p\n", bo);
382 return 0;
383 }
384 bo->pin_count--;
385 if (bo->pin_count)
386 return 0;
387
388 for (i = 0; i < bo->placement.num_placement ; i++)
389 bo->placements[i].flags &= ~TTM_PL_FLAG_NO_EVICT;
390 ret = ttm_bo_validate(&bo->bo, &bo->placement, false, false);
391 if (ret)
392 return ret;
393
394 return 0;
395}
396
397int ast_bo_push_sysram(struct ast_bo *bo)
398{
399 int i, ret;
400 if (!bo->pin_count) {
401 DRM_ERROR("unpin bad %p\n", bo);
402 return 0;
403 }
404 bo->pin_count--;
405 if (bo->pin_count)
406 return 0;
407
408 if (bo->kmap.virtual)
409 ttm_bo_kunmap(&bo->kmap);
410
411 ast_ttm_placement(bo, TTM_PL_FLAG_SYSTEM);
412 for (i = 0; i < bo->placement.num_placement ; i++)
413 bo->placements[i].flags |= TTM_PL_FLAG_NO_EVICT;
414
415 ret = ttm_bo_validate(&bo->bo, &bo->placement, false, false);
416 if (ret) {
417 DRM_ERROR("pushing to VRAM failed\n");
418 return ret;
419 }
420 return 0;
421}
422
423int ast_mmap(struct file *filp, struct vm_area_struct *vma)
424{
425 struct drm_file *file_priv;
426 struct ast_private *ast;
427
428 if (unlikely(vma->vm_pgoff < DRM_FILE_PAGE_OFFSET))
429 return -EINVAL;
430
431 file_priv = filp->private_data;
432 ast = file_priv->minor->dev->dev_private;
433 return ttm_bo_mmap(filp, vma, &ast->ttm.bdev);
434}