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2024-05-11 04dd17822334871b23ea2862f7798fb0e0007777 
 kernel/drivers/gpu/drm/hisilicon/hibmc/hibmc_ttm.c
....@@ -1,3 +1,4 @@
1
+// SPDX-License-Identifier: GPL-2.0-or-later
12 /* Hisilicon Hibmc SoC drm driver
23  *
34  * Based on the bochs drm driver.
....@@ -8,537 +9,53 @@
89  *	Rongrong Zou <zourongrong@huawei.com>
910  *	Rongrong Zou <zourongrong@gmail.com>
1011  *	Jianhua Li <lijianhua@huawei.com>
11
- *
12
- * This program is free software; you can redistribute it and/or modify
13
- * it under the terms of the GNU General Public License as published by
14
- * the Free Software Foundation; either version 2 of the License, or
15
- * (at your option) any later version.
16
- *
1712  */
1813 
14
+#include <linux/pci.h>
15
+
1916 #include <drm/drm_atomic_helper.h>
20
-#include <drm/ttm/ttm_page_alloc.h>
17
+#include <drm/drm_gem.h>
18
+#include <drm/drm_gem_framebuffer_helper.h>
19
+#include <drm/drm_gem_vram_helper.h>
20
+#include <drm/drm_print.h>
2121 
2222 #include "hibmc_drm_drv.h"
2323 
24
-#define DRM_FILE_PAGE_OFFSET (0x100000000ULL >> PAGE_SHIFT)
25
-
26
-static inline struct hibmc_drm_private *
27
-hibmc_bdev(struct ttm_bo_device *bd)
28
-{
29
-	return container_of(bd, struct hibmc_drm_private, bdev);
30
-}
31
-
32
-static int
33
-hibmc_ttm_mem_global_init(struct drm_global_reference *ref)
34
-{
35
-	return ttm_mem_global_init(ref->object);
36
-}
37
-
38
-static void
39
-hibmc_ttm_mem_global_release(struct drm_global_reference *ref)
40
-{
41
-	ttm_mem_global_release(ref->object);
42
-}
43
-
44
-static int hibmc_ttm_global_init(struct hibmc_drm_private *hibmc)
45
-{
46
-	int ret;
47
-
48
-	hibmc->mem_global_ref.global_type = DRM_GLOBAL_TTM_MEM;
49
-	hibmc->mem_global_ref.size = sizeof(struct ttm_mem_global);
50
-	hibmc->mem_global_ref.init = &hibmc_ttm_mem_global_init;
51
-	hibmc->mem_global_ref.release = &hibmc_ttm_mem_global_release;
52
-	ret = drm_global_item_ref(&hibmc->mem_global_ref);
53
-	if (ret) {
54
-		DRM_ERROR("could not get ref on ttm global: %d\n", ret);
55
-		return ret;
56
-	}
57
-
58
-	hibmc->bo_global_ref.mem_glob =
59
-		hibmc->mem_global_ref.object;
60
-	hibmc->bo_global_ref.ref.global_type = DRM_GLOBAL_TTM_BO;
61
-	hibmc->bo_global_ref.ref.size = sizeof(struct ttm_bo_global);
62
-	hibmc->bo_global_ref.ref.init = &ttm_bo_global_init;
63
-	hibmc->bo_global_ref.ref.release = &ttm_bo_global_release;
64
-	ret = drm_global_item_ref(&hibmc->bo_global_ref.ref);
65
-	if (ret) {
66
-		DRM_ERROR("failed setting up TTM BO subsystem: %d\n", ret);
67
-		drm_global_item_unref(&hibmc->mem_global_ref);
68
-		return ret;
69
-	}
70
-	return 0;
71
-}
72
-
73
-static void
74
-hibmc_ttm_global_release(struct hibmc_drm_private *hibmc)
75
-{
76
-	drm_global_item_unref(&hibmc->bo_global_ref.ref);
77
-	drm_global_item_unref(&hibmc->mem_global_ref);
78
-	hibmc->mem_global_ref.release = NULL;
79
-}
80
-
81
-static void hibmc_bo_ttm_destroy(struct ttm_buffer_object *tbo)
82
-{
83
-	struct hibmc_bo *bo = container_of(tbo, struct hibmc_bo, bo);
84
-
85
-	drm_gem_object_release(&bo->gem);
86
-	kfree(bo);
87
-}
88
-
89
-static bool hibmc_ttm_bo_is_hibmc_bo(struct ttm_buffer_object *bo)
90
-{
91
-	return bo->destroy == &hibmc_bo_ttm_destroy;
92
-}
93
-
94
-static int
95
-hibmc_bo_init_mem_type(struct ttm_bo_device *bdev, u32 type,
96
-		       struct ttm_mem_type_manager *man)
97
-{
98
-	switch (type) {
99
-	case TTM_PL_SYSTEM:
100
-		man->flags = TTM_MEMTYPE_FLAG_MAPPABLE;
101
-		man->available_caching = TTM_PL_MASK_CACHING;
102
-		man->default_caching = TTM_PL_FLAG_CACHED;
103
-		break;
104
-	case TTM_PL_VRAM:
105
-		man->func = &ttm_bo_manager_func;
106
-		man->flags = TTM_MEMTYPE_FLAG_FIXED |
107
-			TTM_MEMTYPE_FLAG_MAPPABLE;
108
-		man->available_caching = TTM_PL_FLAG_UNCACHED |
109
-			TTM_PL_FLAG_WC;
110
-		man->default_caching = TTM_PL_FLAG_WC;
111
-		break;
112
-	default:
113
-		DRM_ERROR("unsupported memory type %u\n", type);
114
-		return -EINVAL;
115
-	}
116
-	return 0;
117
-}
118
-
119
-void hibmc_ttm_placement(struct hibmc_bo *bo, int domain)
120
-{
121
-	u32 count = 0;
122
-	u32 i;
123
-
124
-	bo->placement.placement = bo->placements;
125
-	bo->placement.busy_placement = bo->placements;
126
-	if (domain & TTM_PL_FLAG_VRAM)
127
-		bo->placements[count++].flags = TTM_PL_FLAG_WC |
128
-			TTM_PL_FLAG_UNCACHED | TTM_PL_FLAG_VRAM;
129
-	if (domain & TTM_PL_FLAG_SYSTEM)
130
-		bo->placements[count++].flags = TTM_PL_MASK_CACHING |
131
-			TTM_PL_FLAG_SYSTEM;
132
-	if (!count)
133
-		bo->placements[count++].flags = TTM_PL_MASK_CACHING |
134
-			TTM_PL_FLAG_SYSTEM;
135
-
136
-	bo->placement.num_placement = count;
137
-	bo->placement.num_busy_placement = count;
138
-	for (i = 0; i < count; i++) {
139
-		bo->placements[i].fpfn = 0;
140
-		bo->placements[i].lpfn = 0;
141
-	}
142
-}
143
-
144
-static void
145
-hibmc_bo_evict_flags(struct ttm_buffer_object *bo, struct ttm_placement *pl)
146
-{
147
-	struct hibmc_bo *hibmcbo = hibmc_bo(bo);
148
-
149
-	if (!hibmc_ttm_bo_is_hibmc_bo(bo))
150
-		return;
151
-
152
-	hibmc_ttm_placement(hibmcbo, TTM_PL_FLAG_SYSTEM);
153
-	*pl = hibmcbo->placement;
154
-}
155
-
156
-static int hibmc_bo_verify_access(struct ttm_buffer_object *bo,
157
-				  struct file *filp)
158
-{
159
-	struct hibmc_bo *hibmcbo = hibmc_bo(bo);
160
-
161
-	return drm_vma_node_verify_access(&hibmcbo->gem.vma_node,
162
-					  filp->private_data);
163
-}
164
-
165
-static int hibmc_ttm_io_mem_reserve(struct ttm_bo_device *bdev,
166
-				    struct ttm_mem_reg *mem)
167
-{
168
-	struct ttm_mem_type_manager *man = &bdev->man[mem->mem_type];
169
-	struct hibmc_drm_private *hibmc = hibmc_bdev(bdev);
170
-
171
-	mem->bus.addr = NULL;
172
-	mem->bus.offset = 0;
173
-	mem->bus.size = mem->num_pages << PAGE_SHIFT;
174
-	mem->bus.base = 0;
175
-	mem->bus.is_iomem = false;
176
-	if (!(man->flags & TTM_MEMTYPE_FLAG_MAPPABLE))
177
-		return -EINVAL;
178
-	switch (mem->mem_type) {
179
-	case TTM_PL_SYSTEM:
180
-		/* system memory */
181
-		return 0;
182
-	case TTM_PL_VRAM:
183
-		mem->bus.offset = mem->start << PAGE_SHIFT;
184
-		mem->bus.base = pci_resource_start(hibmc->dev->pdev, 0);
185
-		mem->bus.is_iomem = true;
186
-		break;
187
-	default:
188
-		return -EINVAL;
189
-	}
190
-	return 0;
191
-}
192
-
193
-static void hibmc_ttm_backend_destroy(struct ttm_tt *tt)
194
-{
195
-	ttm_tt_fini(tt);
196
-	kfree(tt);
197
-}
198
-
199
-static struct ttm_backend_func hibmc_tt_backend_func = {
200
-	.destroy = &hibmc_ttm_backend_destroy,
201
-};
202
-
203
-static struct ttm_tt *hibmc_ttm_tt_create(struct ttm_buffer_object *bo,
204
-					  u32 page_flags)
205
-{
206
-	struct ttm_tt *tt;
207
-	int ret;
208
-
209
-	tt = kzalloc(sizeof(*tt), GFP_KERNEL);
210
-	if (!tt) {
211
-		DRM_ERROR("failed to allocate ttm_tt\n");
212
-		return NULL;
213
-	}
214
-	tt->func = &hibmc_tt_backend_func;
215
-	ret = ttm_tt_init(tt, bo, page_flags);
216
-	if (ret) {
217
-		DRM_ERROR("failed to initialize ttm_tt: %d\n", ret);
218
-		kfree(tt);
219
-		return NULL;
220
-	}
221
-	return tt;
222
-}
223
-
224
-struct ttm_bo_driver hibmc_bo_driver = {
225
-	.ttm_tt_create		= hibmc_ttm_tt_create,
226
-	.init_mem_type		= hibmc_bo_init_mem_type,
227
-	.evict_flags		= hibmc_bo_evict_flags,
228
-	.move			= NULL,
229
-	.verify_access		= hibmc_bo_verify_access,
230
-	.io_mem_reserve		= &hibmc_ttm_io_mem_reserve,
231
-	.io_mem_free		= NULL,
232
-};
233
-
23424 int hibmc_mm_init(struct hibmc_drm_private *hibmc)
23525 {
26
+	struct drm_vram_mm *vmm;
23627 	int ret;
23728 	struct drm_device *dev = hibmc->dev;
238
-	struct ttm_bo_device *bdev = &hibmc->bdev;
23929 
240
-	ret = hibmc_ttm_global_init(hibmc);
241
-	if (ret)
242
-		return ret;
243
-
244
-	ret = ttm_bo_device_init(&hibmc->bdev,
245
-				 hibmc->bo_global_ref.ref.object,
246
-				 &hibmc_bo_driver,
247
-				 dev->anon_inode->i_mapping,
248
-				 DRM_FILE_PAGE_OFFSET,
249
-				 true);
250
-	if (ret) {
251
-		hibmc_ttm_global_release(hibmc);
252
-		DRM_ERROR("error initializing bo driver: %d\n", ret);
30
+	vmm = drm_vram_helper_alloc_mm(dev,
31
+				       pci_resource_start(dev->pdev, 0),
32
+				       hibmc->fb_size);
33
+	if (IS_ERR(vmm)) {
34
+		ret = PTR_ERR(vmm);
35
+		drm_err(dev, "Error initializing VRAM MM; %d\n", ret);
25336 		return ret;
25437 	}
25538 
256
-	ret = ttm_bo_init_mm(bdev, TTM_PL_VRAM,
257
-			     hibmc->fb_size >> PAGE_SHIFT);
258
-	if (ret) {
259
-		hibmc_ttm_global_release(hibmc);
260
-		DRM_ERROR("failed ttm VRAM init: %d\n", ret);
261
-		return ret;
262
-	}
263
-
264
-	hibmc->mm_inited = true;
26539 	return 0;
26640 }
26741 
26842 void hibmc_mm_fini(struct hibmc_drm_private *hibmc)
26943 {
270
-	if (!hibmc->mm_inited)
44
+	if (!hibmc->dev->vram_mm)
27145 		return;
27246 
273
-	ttm_bo_device_release(&hibmc->bdev);
274
-	hibmc_ttm_global_release(hibmc);
275
-	hibmc->mm_inited = false;
276
-}
277
-
278
-static void hibmc_bo_unref(struct hibmc_bo **bo)
279
-{
280
-	struct ttm_buffer_object *tbo;
281
-
282
-	if ((*bo) == NULL)
283
-		return;
284
-
285
-	tbo = &((*bo)->bo);
286
-	ttm_bo_unref(&tbo);
287
-	*bo = NULL;
288
-}
289
-
290
-int hibmc_bo_create(struct drm_device *dev, int size, int align,
291
-		    u32 flags, struct hibmc_bo **phibmcbo)
292
-{
293
-	struct hibmc_drm_private *hibmc = dev->dev_private;
294
-	struct hibmc_bo *hibmcbo;
295
-	size_t acc_size;
296
-	int ret;
297
-
298
-	hibmcbo = kzalloc(sizeof(*hibmcbo), GFP_KERNEL);
299
-	if (!hibmcbo) {
300
-		DRM_ERROR("failed to allocate hibmcbo\n");
301
-		return -ENOMEM;
302
-	}
303
-	ret = drm_gem_object_init(dev, &hibmcbo->gem, size);
304
-	if (ret) {
305
-		DRM_ERROR("failed to initialize drm gem object: %d\n", ret);
306
-		kfree(hibmcbo);
307
-		return ret;
308
-	}
309
-
310
-	hibmcbo->bo.bdev = &hibmc->bdev;
311
-
312
-	hibmc_ttm_placement(hibmcbo, TTM_PL_FLAG_VRAM | TTM_PL_FLAG_SYSTEM);
313
-
314
-	acc_size = ttm_bo_dma_acc_size(&hibmc->bdev, size,
315
-				       sizeof(struct hibmc_bo));
316
-
317
-	ret = ttm_bo_init(&hibmc->bdev, &hibmcbo->bo, size,
318
-			  ttm_bo_type_device, &hibmcbo->placement,
319
-			  align >> PAGE_SHIFT, false, acc_size,
320
-			  NULL, NULL, hibmc_bo_ttm_destroy);
321
-	if (ret) {
322
-		hibmc_bo_unref(&hibmcbo);
323
-		DRM_ERROR("failed to initialize ttm_bo: %d\n", ret);
324
-		return ret;
325
-	}
326
-
327
-	*phibmcbo = hibmcbo;
328
-	return 0;
329
-}
330
-
331
-int hibmc_bo_pin(struct hibmc_bo *bo, u32 pl_flag, u64 *gpu_addr)
332
-{
333
-	struct ttm_operation_ctx ctx = { false, false };
334
-	int i, ret;
335
-
336
-	if (bo->pin_count) {
337
-		bo->pin_count++;
338
-		if (gpu_addr)
339
-			*gpu_addr = bo->bo.offset;
340
-		return 0;
341
-	}
342
-
343
-	hibmc_ttm_placement(bo, pl_flag);
344
-	for (i = 0; i < bo->placement.num_placement; i++)
345
-		bo->placements[i].flags |= TTM_PL_FLAG_NO_EVICT;
346
-	ret = ttm_bo_validate(&bo->bo, &bo->placement, &ctx);
347
-	if (ret)
348
-		return ret;
349
-
350
-	bo->pin_count = 1;
351
-	if (gpu_addr)
352
-		*gpu_addr = bo->bo.offset;
353
-	return 0;
354
-}
355
-
356
-int hibmc_bo_unpin(struct hibmc_bo *bo)
357
-{
358
-	struct ttm_operation_ctx ctx = { false, false };
359
-	int i, ret;
360
-
361
-	if (!bo->pin_count) {
362
-		DRM_ERROR("unpin bad %p\n", bo);
363
-		return 0;
364
-	}
365
-	bo->pin_count--;
366
-	if (bo->pin_count)
367
-		return 0;
368
-
369
-	for (i = 0; i < bo->placement.num_placement ; i++)
370
-		bo->placements[i].flags &= ~TTM_PL_FLAG_NO_EVICT;
371
-	ret = ttm_bo_validate(&bo->bo, &bo->placement, &ctx);
372
-	if (ret) {
373
-		DRM_ERROR("validate failed for unpin: %d\n", ret);
374
-		return ret;
375
-	}
376
-
377
-	return 0;
378
-}
379
-
380
-int hibmc_mmap(struct file *filp, struct vm_area_struct *vma)
381
-{
382
-	struct drm_file *file_priv;
383
-	struct hibmc_drm_private *hibmc;
384
-
385
-	if (unlikely(vma->vm_pgoff < DRM_FILE_PAGE_OFFSET))
386
-		return -EINVAL;
387
-
388
-	file_priv = filp->private_data;
389
-	hibmc = file_priv->minor->dev->dev_private;
390
-	return ttm_bo_mmap(filp, vma, &hibmc->bdev);
391
-}
392
-
393
-int hibmc_gem_create(struct drm_device *dev, u32 size, bool iskernel,
394
-		     struct drm_gem_object **obj)
395
-{
396
-	struct hibmc_bo *hibmcbo;
397
-	int ret;
398
-
399
-	*obj = NULL;
400
-
401
-	size = PAGE_ALIGN(size);
402
-	if (size == 0) {
403
-		DRM_ERROR("error: zero size\n");
404
-		return -EINVAL;
405
-	}
406
-
407
-	ret = hibmc_bo_create(dev, size, 0, 0, &hibmcbo);
408
-	if (ret) {
409
-		if (ret != -ERESTARTSYS)
410
-			DRM_ERROR("failed to allocate GEM object: %d\n", ret);
411
-		return ret;
412
-	}
413
-	*obj = &hibmcbo->gem;
414
-	return 0;
47
+	drm_vram_helper_release_mm(hibmc->dev);
41548 }
41649 
41750 int hibmc_dumb_create(struct drm_file *file, struct drm_device *dev,
41851 		      struct drm_mode_create_dumb *args)
41952 {
420
-	struct drm_gem_object *gobj;
421
-	u32 handle;
422
-	int ret;
423
-
424
-	args->pitch = ALIGN(args->width * DIV_ROUND_UP(args->bpp, 8), 16);
425
-	args->size = args->pitch * args->height;
426
-
427
-	ret = hibmc_gem_create(dev, args->size, false,
428
-			       &gobj);
429
-	if (ret) {
430
-		DRM_ERROR("failed to create GEM object: %d\n", ret);
431
-		return ret;
432
-	}
433
-
434
-	ret = drm_gem_handle_create(file, gobj, &handle);
435
-	drm_gem_object_put_unlocked(gobj);
436
-	if (ret) {
437
-		DRM_ERROR("failed to unreference GEM object: %d\n", ret);
438
-		return ret;
439
-	}
440
-
441
-	args->handle = handle;
442
-	return 0;
443
-}
444
-
445
-void hibmc_gem_free_object(struct drm_gem_object *obj)
446
-{
447
-	struct hibmc_bo *hibmcbo = gem_to_hibmc_bo(obj);
448
-
449
-	hibmc_bo_unref(&hibmcbo);
450
-}
451
-
452
-static u64 hibmc_bo_mmap_offset(struct hibmc_bo *bo)
453
-{
454
-	return drm_vma_node_offset_addr(&bo->bo.vma_node);
455
-}
456
-
457
-int hibmc_dumb_mmap_offset(struct drm_file *file, struct drm_device *dev,
458
-			   u32 handle, u64 *offset)
459
-{
460
-	struct drm_gem_object *obj;
461
-	struct hibmc_bo *bo;
462
-
463
-	obj = drm_gem_object_lookup(file, handle);
464
-	if (!obj)
465
-		return -ENOENT;
466
-
467
-	bo = gem_to_hibmc_bo(obj);
468
-	*offset = hibmc_bo_mmap_offset(bo);
469
-
470
-	drm_gem_object_put_unlocked(obj);
471
-	return 0;
472
-}
473
-
474
-static void hibmc_user_framebuffer_destroy(struct drm_framebuffer *fb)
475
-{
476
-	struct hibmc_framebuffer *hibmc_fb = to_hibmc_framebuffer(fb);
477
-
478
-	drm_gem_object_put_unlocked(hibmc_fb->obj);
479
-	drm_framebuffer_cleanup(fb);
480
-	kfree(hibmc_fb);
481
-}
482
-
483
-static const struct drm_framebuffer_funcs hibmc_fb_funcs = {
484
-	.destroy = hibmc_user_framebuffer_destroy,
485
-};
486
-
487
-struct hibmc_framebuffer *
488
-hibmc_framebuffer_init(struct drm_device *dev,
489
-		       const struct drm_mode_fb_cmd2 *mode_cmd,
490
-		       struct drm_gem_object *obj)
491
-{
492
-	struct hibmc_framebuffer *hibmc_fb;
493
-	int ret;
494
-
495
-	hibmc_fb = kzalloc(sizeof(*hibmc_fb), GFP_KERNEL);
496
-	if (!hibmc_fb) {
497
-		DRM_ERROR("failed to allocate hibmc_fb\n");
498
-		return ERR_PTR(-ENOMEM);
499
-	}
500
-
501
-	drm_helper_mode_fill_fb_struct(dev, &hibmc_fb->fb, mode_cmd);
502
-	hibmc_fb->obj = obj;
503
-	ret = drm_framebuffer_init(dev, &hibmc_fb->fb, &hibmc_fb_funcs);
504
-	if (ret) {
505
-		DRM_ERROR("drm_framebuffer_init failed: %d\n", ret);
506
-		kfree(hibmc_fb);
507
-		return ERR_PTR(ret);
508
-	}
509
-
510
-	return hibmc_fb;
511
-}
512
-
513
-static struct drm_framebuffer *
514
-hibmc_user_framebuffer_create(struct drm_device *dev,
515
-			      struct drm_file *filp,
516
-			      const struct drm_mode_fb_cmd2 *mode_cmd)
517
-{
518
-	struct drm_gem_object *obj;
519
-	struct hibmc_framebuffer *hibmc_fb;
520
-
521
-	DRM_DEBUG_DRIVER("%dx%d, format %c%c%c%c\n",
522
-			 mode_cmd->width, mode_cmd->height,
523
-			 (mode_cmd->pixel_format) & 0xff,
524
-			 (mode_cmd->pixel_format >> 8)  & 0xff,
525
-			 (mode_cmd->pixel_format >> 16) & 0xff,
526
-			 (mode_cmd->pixel_format >> 24) & 0xff);
527
-
528
-	obj = drm_gem_object_lookup(filp, mode_cmd->handles[0]);
529
-	if (!obj)
530
-		return ERR_PTR(-ENOENT);
531
-
532
-	hibmc_fb = hibmc_framebuffer_init(dev, mode_cmd, obj);
533
-	if (IS_ERR(hibmc_fb)) {
534
-		drm_gem_object_put_unlocked(obj);
535
-		return ERR_PTR((long)hibmc_fb);
536
-	}
537
-	return &hibmc_fb->fb;
53
+	return drm_gem_vram_fill_create_dumb(file, dev, 0, 128, args);
53854 }
53955 
54056 const struct drm_mode_config_funcs hibmc_mode_funcs = {
57
+	.mode_valid = drm_vram_helper_mode_valid,
54158 	.atomic_check = drm_atomic_helper_check,
54259 	.atomic_commit = drm_atomic_helper_commit,
543
-	.fb_create = hibmc_user_framebuffer_create,
60
+	.fb_create = drm_gem_fb_create,
54461 };