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