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2024-01-04 1543e317f1da31b75942316931e8f491a8920811 
 kernel/drivers/gpu/drm/bochs/bochs_mm.c
....@@ -1,533 +1,24 @@
1
+// SPDX-License-Identifier: GPL-2.0-or-later
12 /*
2
- * This program is free software; you can redistribute it and/or modify
3
- * it under the terms of the GNU General Public License as published by
4
- * the Free Software Foundation; either version 2 of the License, or
5
- * (at your option) any later version.
63  */
74 
85 #include "bochs.h"
96 
10
-static void bochs_ttm_placement(struct bochs_bo *bo, int domain);
11
-
127 /* ---------------------------------------------------------------------- */
13
-
14
-static inline struct bochs_device *bochs_bdev(struct ttm_bo_device *bd)
15
-{
16
-	return container_of(bd, struct bochs_device, ttm.bdev);
17
-}
18
-
19
-static int bochs_ttm_mem_global_init(struct drm_global_reference *ref)
20
-{
21
-	return ttm_mem_global_init(ref->object);
22
-}
23
-
24
-static void bochs_ttm_mem_global_release(struct drm_global_reference *ref)
25
-{
26
-	ttm_mem_global_release(ref->object);
27
-}
28
-
29
-static int bochs_ttm_global_init(struct bochs_device *bochs)
30
-{
31
-	struct drm_global_reference *global_ref;
32
-	int r;
33
-
34
-	global_ref = &bochs->ttm.mem_global_ref;
35
-	global_ref->global_type = DRM_GLOBAL_TTM_MEM;
36
-	global_ref->size = sizeof(struct ttm_mem_global);
37
-	global_ref->init = &bochs_ttm_mem_global_init;
38
-	global_ref->release = &bochs_ttm_mem_global_release;
39
-	r = drm_global_item_ref(global_ref);
40
-	if (r != 0) {
41
-		DRM_ERROR("Failed setting up TTM memory accounting "
42
-			  "subsystem.\n");
43
-		return r;
44
-	}
45
-
46
-	bochs->ttm.bo_global_ref.mem_glob =
47
-		bochs->ttm.mem_global_ref.object;
48
-	global_ref = &bochs->ttm.bo_global_ref.ref;
49
-	global_ref->global_type = DRM_GLOBAL_TTM_BO;
50
-	global_ref->size = sizeof(struct ttm_bo_global);
51
-	global_ref->init = &ttm_bo_global_init;
52
-	global_ref->release = &ttm_bo_global_release;
53
-	r = drm_global_item_ref(global_ref);
54
-	if (r != 0) {
55
-		DRM_ERROR("Failed setting up TTM BO subsystem.\n");
56
-		drm_global_item_unref(&bochs->ttm.mem_global_ref);
57
-		return r;
58
-	}
59
-
60
-	return 0;
61
-}
62
-
63
-static void bochs_ttm_global_release(struct bochs_device *bochs)
64
-{
65
-	if (bochs->ttm.mem_global_ref.release == NULL)
66
-		return;
67
-
68
-	drm_global_item_unref(&bochs->ttm.bo_global_ref.ref);
69
-	drm_global_item_unref(&bochs->ttm.mem_global_ref);
70
-	bochs->ttm.mem_global_ref.release = NULL;
71
-}
72
-
73
-
74
-static void bochs_bo_ttm_destroy(struct ttm_buffer_object *tbo)
75
-{
76
-	struct bochs_bo *bo;
77
-
78
-	bo = container_of(tbo, struct bochs_bo, bo);
79
-	drm_gem_object_release(&bo->gem);
80
-	kfree(bo);
81
-}
82
-
83
-static bool bochs_ttm_bo_is_bochs_bo(struct ttm_buffer_object *bo)
84
-{
85
-	if (bo->destroy == &bochs_bo_ttm_destroy)
86
-		return true;
87
-	return false;
88
-}
89
-
90
-static int bochs_bo_init_mem_type(struct ttm_bo_device *bdev, uint32_t type,
91
-				  struct ttm_mem_type_manager *man)
92
-{
93
-	switch (type) {
94
-	case TTM_PL_SYSTEM:
95
-		man->flags = TTM_MEMTYPE_FLAG_MAPPABLE;
96
-		man->available_caching = TTM_PL_MASK_CACHING;
97
-		man->default_caching = TTM_PL_FLAG_CACHED;
98
-		break;
99
-	case TTM_PL_VRAM:
100
-		man->func = &ttm_bo_manager_func;
101
-		man->flags = TTM_MEMTYPE_FLAG_FIXED |
102
-			TTM_MEMTYPE_FLAG_MAPPABLE;
103
-		man->available_caching = TTM_PL_FLAG_UNCACHED |
104
-			TTM_PL_FLAG_WC;
105
-		man->default_caching = TTM_PL_FLAG_WC;
106
-		break;
107
-	default:
108
-		DRM_ERROR("Unsupported memory type %u\n", (unsigned)type);
109
-		return -EINVAL;
110
-	}
111
-	return 0;
112
-}
113
-
114
-static void
115
-bochs_bo_evict_flags(struct ttm_buffer_object *bo, struct ttm_placement *pl)
116
-{
117
-	struct bochs_bo *bochsbo = bochs_bo(bo);
118
-
119
-	if (!bochs_ttm_bo_is_bochs_bo(bo))
120
-		return;
121
-
122
-	bochs_ttm_placement(bochsbo, TTM_PL_FLAG_SYSTEM);
123
-	*pl = bochsbo->placement;
124
-}
125
-
126
-static int bochs_bo_verify_access(struct ttm_buffer_object *bo,
127
-				  struct file *filp)
128
-{
129
-	struct bochs_bo *bochsbo = bochs_bo(bo);
130
-
131
-	return drm_vma_node_verify_access(&bochsbo->gem.vma_node,
132
-					  filp->private_data);
133
-}
134
-
135
-static int bochs_ttm_io_mem_reserve(struct ttm_bo_device *bdev,
136
-				    struct ttm_mem_reg *mem)
137
-{
138
-	struct ttm_mem_type_manager *man = &bdev->man[mem->mem_type];
139
-	struct bochs_device *bochs = bochs_bdev(bdev);
140
-
141
-	mem->bus.addr = NULL;
142
-	mem->bus.offset = 0;
143
-	mem->bus.size = mem->num_pages << PAGE_SHIFT;
144
-	mem->bus.base = 0;
145
-	mem->bus.is_iomem = false;
146
-	if (!(man->flags & TTM_MEMTYPE_FLAG_MAPPABLE))
147
-		return -EINVAL;
148
-	switch (mem->mem_type) {
149
-	case TTM_PL_SYSTEM:
150
-		/* system memory */
151
-		return 0;
152
-	case TTM_PL_VRAM:
153
-		mem->bus.offset = mem->start << PAGE_SHIFT;
154
-		mem->bus.base = bochs->fb_base;
155
-		mem->bus.is_iomem = true;
156
-		break;
157
-	default:
158
-		return -EINVAL;
159
-		break;
160
-	}
161
-	return 0;
162
-}
163
-
164
-static void bochs_ttm_io_mem_free(struct ttm_bo_device *bdev,
165
-				  struct ttm_mem_reg *mem)
166
-{
167
-}
168
-
169
-static void bochs_ttm_backend_destroy(struct ttm_tt *tt)
170
-{
171
-	ttm_tt_fini(tt);
172
-	kfree(tt);
173
-}
174
-
175
-static struct ttm_backend_func bochs_tt_backend_func = {
176
-	.destroy = &bochs_ttm_backend_destroy,
177
-};
178
-
179
-static struct ttm_tt *bochs_ttm_tt_create(struct ttm_buffer_object *bo,
180
-					  uint32_t page_flags)
181
-{
182
-	struct ttm_tt *tt;
183
-
184
-	tt = kzalloc(sizeof(struct ttm_tt), GFP_KERNEL);
185
-	if (tt == NULL)
186
-		return NULL;
187
-	tt->func = &bochs_tt_backend_func;
188
-	if (ttm_tt_init(tt, bo, page_flags)) {
189
-		kfree(tt);
190
-		return NULL;
191
-	}
192
-	return tt;
193
-}
194
-
195
-static struct ttm_bo_driver bochs_bo_driver = {
196
-	.ttm_tt_create = bochs_ttm_tt_create,
197
-	.init_mem_type = bochs_bo_init_mem_type,
198
-	.eviction_valuable = ttm_bo_eviction_valuable,
199
-	.evict_flags = bochs_bo_evict_flags,
200
-	.move = NULL,
201
-	.verify_access = bochs_bo_verify_access,
202
-	.io_mem_reserve = &bochs_ttm_io_mem_reserve,
203
-	.io_mem_free = &bochs_ttm_io_mem_free,
204
-};
2058 
2069 int bochs_mm_init(struct bochs_device *bochs)
20710 {
208
-	struct ttm_bo_device *bdev = &bochs->ttm.bdev;
209
-	int ret;
11
+	struct drm_vram_mm *vmm;
21012 
211
-	ret = bochs_ttm_global_init(bochs);
212
-	if (ret)
213
-		return ret;
214
-
215
-	ret = ttm_bo_device_init(&bochs->ttm.bdev,
216
-				 bochs->ttm.bo_global_ref.ref.object,
217
-				 &bochs_bo_driver,
218
-				 bochs->dev->anon_inode->i_mapping,
219
-				 DRM_FILE_PAGE_OFFSET,
220
-				 true);
221
-	if (ret) {
222
-		DRM_ERROR("Error initialising bo driver; %d\n", ret);
223
-		return ret;
224
-	}
225
-
226
-	ret = ttm_bo_init_mm(bdev, TTM_PL_VRAM,
227
-			     bochs->fb_size >> PAGE_SHIFT);
228
-	if (ret) {
229
-		DRM_ERROR("Failed ttm VRAM init: %d\n", ret);
230
-		return ret;
231
-	}
232
-
233
-	bochs->ttm.initialized = true;
234
-	return 0;
13
+	vmm = drm_vram_helper_alloc_mm(bochs->dev, bochs->fb_base,
14
+				       bochs->fb_size);
15
+	return PTR_ERR_OR_ZERO(vmm);
23516 }
23617 
23718 void bochs_mm_fini(struct bochs_device *bochs)
23819 {
239
-	if (!bochs->ttm.initialized)
20
+	if (!bochs->dev->vram_mm)
24021 		return;
24122 
242
-	ttm_bo_device_release(&bochs->ttm.bdev);
243
-	bochs_ttm_global_release(bochs);
244
-	bochs->ttm.initialized = false;
23
+	drm_vram_helper_release_mm(bochs->dev);
24524 }
246
-
247
-static void bochs_ttm_placement(struct bochs_bo *bo, int domain)
248
-{
249
-	unsigned i;
250
-	u32 c = 0;
251
-	bo->placement.placement = bo->placements;
252
-	bo->placement.busy_placement = bo->placements;
253
-	if (domain & TTM_PL_FLAG_VRAM) {
254
-		bo->placements[c++].flags = TTM_PL_FLAG_WC
255
-			| TTM_PL_FLAG_UNCACHED
256
-			| TTM_PL_FLAG_VRAM;
257
-	}
258
-	if (domain & TTM_PL_FLAG_SYSTEM) {
259
-		bo->placements[c++].flags = TTM_PL_MASK_CACHING
260
-			| TTM_PL_FLAG_SYSTEM;
261
-	}
262
-	if (!c) {
263
-		bo->placements[c++].flags = TTM_PL_MASK_CACHING
264
-			| TTM_PL_FLAG_SYSTEM;
265
-	}
266
-	for (i = 0; i < c; ++i) {
267
-		bo->placements[i].fpfn = 0;
268
-		bo->placements[i].lpfn = 0;
269
-	}
270
-	bo->placement.num_placement = c;
271
-	bo->placement.num_busy_placement = c;
272
-}
273
-
274
-static inline u64 bochs_bo_gpu_offset(struct bochs_bo *bo)
275
-{
276
-	return bo->bo.offset;
277
-}
278
-
279
-int bochs_bo_pin(struct bochs_bo *bo, u32 pl_flag, u64 *gpu_addr)
280
-{
281
-	struct ttm_operation_ctx ctx = { false, false };
282
-	int i, ret;
283
-
284
-	if (bo->pin_count) {
285
-		bo->pin_count++;
286
-		if (gpu_addr)
287
-			*gpu_addr = bochs_bo_gpu_offset(bo);
288
-		return 0;
289
-	}
290
-
291
-	bochs_ttm_placement(bo, pl_flag);
292
-	for (i = 0; i < bo->placement.num_placement; i++)
293
-		bo->placements[i].flags |= TTM_PL_FLAG_NO_EVICT;
294
-	ret = ttm_bo_validate(&bo->bo, &bo->placement, &ctx);
295
-	if (ret)
296
-		return ret;
297
-
298
-	bo->pin_count = 1;
299
-	if (gpu_addr)
300
-		*gpu_addr = bochs_bo_gpu_offset(bo);
301
-	return 0;
302
-}
303
-
304
-int bochs_bo_unpin(struct bochs_bo *bo)
305
-{
306
-	struct ttm_operation_ctx ctx = { false, false };
307
-	int i, ret;
308
-
309
-	if (!bo->pin_count) {
310
-		DRM_ERROR("unpin bad %p\n", bo);
311
-		return 0;
312
-	}
313
-	bo->pin_count--;
314
-
315
-	if (bo->pin_count)
316
-		return 0;
317
-
318
-	for (i = 0; i < bo->placement.num_placement; i++)
319
-		bo->placements[i].flags &= ~TTM_PL_FLAG_NO_EVICT;
320
-	ret = ttm_bo_validate(&bo->bo, &bo->placement, &ctx);
321
-	if (ret)
322
-		return ret;
323
-
324
-	return 0;
325
-}
326
-
327
-int bochs_mmap(struct file *filp, struct vm_area_struct *vma)
328
-{
329
-	struct drm_file *file_priv;
330
-	struct bochs_device *bochs;
331
-
332
-	if (unlikely(vma->vm_pgoff < DRM_FILE_PAGE_OFFSET))
333
-		return -EINVAL;
334
-
335
-	file_priv = filp->private_data;
336
-	bochs = file_priv->minor->dev->dev_private;
337
-	return ttm_bo_mmap(filp, vma, &bochs->ttm.bdev);
338
-}
339
-
340
-/* ---------------------------------------------------------------------- */
341
-
342
-static int bochs_bo_create(struct drm_device *dev, int size, int align,
343
-			   uint32_t flags, struct bochs_bo **pbochsbo)
344
-{
345
-	struct bochs_device *bochs = dev->dev_private;
346
-	struct bochs_bo *bochsbo;
347
-	size_t acc_size;
348
-	int ret;
349
-
350
-	bochsbo = kzalloc(sizeof(struct bochs_bo), GFP_KERNEL);
351
-	if (!bochsbo)
352
-		return -ENOMEM;
353
-
354
-	ret = drm_gem_object_init(dev, &bochsbo->gem, size);
355
-	if (ret) {
356
-		kfree(bochsbo);
357
-		return ret;
358
-	}
359
-
360
-	bochsbo->bo.bdev = &bochs->ttm.bdev;
361
-	bochsbo->bo.bdev->dev_mapping = dev->anon_inode->i_mapping;
362
-
363
-	bochs_ttm_placement(bochsbo, TTM_PL_FLAG_VRAM | TTM_PL_FLAG_SYSTEM);
364
-
365
-	acc_size = ttm_bo_dma_acc_size(&bochs->ttm.bdev, size,
366
-				       sizeof(struct bochs_bo));
367
-
368
-	ret = ttm_bo_init(&bochs->ttm.bdev, &bochsbo->bo, size,
369
-			  ttm_bo_type_device, &bochsbo->placement,
370
-			  align >> PAGE_SHIFT, false, acc_size,
371
-			  NULL, NULL, bochs_bo_ttm_destroy);
372
-	if (ret)
373
-		return ret;
374
-
375
-	*pbochsbo = bochsbo;
376
-	return 0;
377
-}
378
-
379
-int bochs_gem_create(struct drm_device *dev, u32 size, bool iskernel,
380
-		     struct drm_gem_object **obj)
381
-{
382
-	struct bochs_bo *bochsbo;
383
-	int ret;
384
-
385
-	*obj = NULL;
386
-
387
-	size = PAGE_ALIGN(size);
388
-	if (size == 0)
389
-		return -EINVAL;
390
-
391
-	ret = bochs_bo_create(dev, size, 0, 0, &bochsbo);
392
-	if (ret) {
393
-		if (ret != -ERESTARTSYS)
394
-			DRM_ERROR("failed to allocate GEM object\n");
395
-		return ret;
396
-	}
397
-	*obj = &bochsbo->gem;
398
-	return 0;
399
-}
400
-
401
-int bochs_dumb_create(struct drm_file *file, struct drm_device *dev,
402
-		      struct drm_mode_create_dumb *args)
403
-{
404
-	struct drm_gem_object *gobj;
405
-	u32 handle;
406
-	int ret;
407
-
408
-	args->pitch = args->width * ((args->bpp + 7) / 8);
409
-	args->size = args->pitch * args->height;
410
-
411
-	ret = bochs_gem_create(dev, args->size, false,
412
-			       &gobj);
413
-	if (ret)
414
-		return ret;
415
-
416
-	ret = drm_gem_handle_create(file, gobj, &handle);
417
-	drm_gem_object_unreference_unlocked(gobj);
418
-	if (ret)
419
-		return ret;
420
-
421
-	args->handle = handle;
422
-	return 0;
423
-}
424
-
425
-static void bochs_bo_unref(struct bochs_bo **bo)
426
-{
427
-	struct ttm_buffer_object *tbo;
428
-
429
-	if ((*bo) == NULL)
430
-		return;
431
-
432
-	tbo = &((*bo)->bo);
433
-	ttm_bo_unref(&tbo);
434
-	*bo = NULL;
435
-}
436
-
437
-void bochs_gem_free_object(struct drm_gem_object *obj)
438
-{
439
-	struct bochs_bo *bochs_bo = gem_to_bochs_bo(obj);
440
-
441
-	bochs_bo_unref(&bochs_bo);
442
-}
443
-
444
-int bochs_dumb_mmap_offset(struct drm_file *file, struct drm_device *dev,
445
-			   uint32_t handle, uint64_t *offset)
446
-{
447
-	struct drm_gem_object *obj;
448
-	struct bochs_bo *bo;
449
-
450
-	obj = drm_gem_object_lookup(file, handle);
451
-	if (obj == NULL)
452
-		return -ENOENT;
453
-
454
-	bo = gem_to_bochs_bo(obj);
455
-	*offset = bochs_bo_mmap_offset(bo);
456
-
457
-	drm_gem_object_unreference_unlocked(obj);
458
-	return 0;
459
-}
460
-
461
-/* ---------------------------------------------------------------------- */
462
-
463
-static void bochs_user_framebuffer_destroy(struct drm_framebuffer *fb)
464
-{
465
-	struct bochs_framebuffer *bochs_fb = to_bochs_framebuffer(fb);
466
-
467
-	drm_gem_object_unreference_unlocked(bochs_fb->obj);
468
-	drm_framebuffer_cleanup(fb);
469
-	kfree(fb);
470
-}
471
-
472
-static const struct drm_framebuffer_funcs bochs_fb_funcs = {
473
-	.destroy = bochs_user_framebuffer_destroy,
474
-};
475
-
476
-int bochs_framebuffer_init(struct drm_device *dev,
477
-			   struct bochs_framebuffer *gfb,
478
-			   const struct drm_mode_fb_cmd2 *mode_cmd,
479
-			   struct drm_gem_object *obj)
480
-{
481
-	int ret;
482
-
483
-	drm_helper_mode_fill_fb_struct(dev, &gfb->base, mode_cmd);
484
-	gfb->obj = obj;
485
-	ret = drm_framebuffer_init(dev, &gfb->base, &bochs_fb_funcs);
486
-	if (ret) {
487
-		DRM_ERROR("drm_framebuffer_init failed: %d\n", ret);
488
-		return ret;
489
-	}
490
-	return 0;
491
-}
492
-
493
-static struct drm_framebuffer *
494
-bochs_user_framebuffer_create(struct drm_device *dev,
495
-			      struct drm_file *filp,
496
-			      const struct drm_mode_fb_cmd2 *mode_cmd)
497
-{
498
-	struct drm_gem_object *obj;
499
-	struct bochs_framebuffer *bochs_fb;
500
-	int ret;
501
-
502
-	DRM_DEBUG_DRIVER("%dx%d, format %c%c%c%c\n",
503
-	       mode_cmd->width, mode_cmd->height,
504
-	       (mode_cmd->pixel_format)       & 0xff,
505
-	       (mode_cmd->pixel_format >> 8)  & 0xff,
506
-	       (mode_cmd->pixel_format >> 16) & 0xff,
507
-	       (mode_cmd->pixel_format >> 24) & 0xff);
508
-
509
-	if (mode_cmd->pixel_format != DRM_FORMAT_XRGB8888)
510
-		return ERR_PTR(-ENOENT);
511
-
512
-	obj = drm_gem_object_lookup(filp, mode_cmd->handles[0]);
513
-	if (obj == NULL)
514
-		return ERR_PTR(-ENOENT);
515
-
516
-	bochs_fb = kzalloc(sizeof(*bochs_fb), GFP_KERNEL);
517
-	if (!bochs_fb) {
518
-		drm_gem_object_unreference_unlocked(obj);
519
-		return ERR_PTR(-ENOMEM);
520
-	}
521
-
522
-	ret = bochs_framebuffer_init(dev, bochs_fb, mode_cmd, obj);
523
-	if (ret) {
524
-		drm_gem_object_unreference_unlocked(obj);
525
-		kfree(bochs_fb);
526
-		return ERR_PTR(ret);
527
-	}
528
-	return &bochs_fb->base;
529
-}
530
-
531
-const struct drm_mode_config_funcs bochs_mode_funcs = {
532
-	.fb_create = bochs_user_framebuffer_create,
533
-};