summaryrefslogtreecommitdiffstats
path: root/drivers/gpu/drm/lima/lima_gem.c
blob: 0f1ca0b0db495c771f8cbd6e079dcf3c36e7d135 (plain)
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
// SPDX-License-Identifier: GPL-2.0 OR MIT
/* Copyright 2017-2019 Qiang Yu <yuq825@gmail.com> */

#include <linux/mm.h>
#include <linux/iosys-map.h>
#include <linux/sync_file.h>
#include <linux/pagemap.h>
#include <linux/shmem_fs.h>
#include <linux/dma-mapping.h>

#include <drm/drm_file.h>
#include <drm/drm_syncobj.h>
#include <drm/drm_utils.h>

#include <drm/lima_drm.h>

#include "lima_drv.h"
#include "lima_gem.h"
#include "lima_vm.h"

int lima_heap_alloc(struct lima_bo *bo, struct lima_vm *vm)
{
	struct page **pages;
	struct address_space *mapping = bo->base.base.filp->f_mapping;
	struct device *dev = bo->base.base.dev->dev;
	size_t old_size = bo->heap_size;
	size_t new_size = bo->heap_size ? bo->heap_size * 2 :
		(lima_heap_init_nr_pages << PAGE_SHIFT);
	struct sg_table sgt;
	int i, ret;

	if (bo->heap_size >= bo->base.base.size)
		return -ENOSPC;

	new_size = min(new_size, bo->base.base.size);

	mutex_lock(&bo->base.pages_lock);

	if (bo->base.pages) {
		pages = bo->base.pages;
	} else {
		pages = kvmalloc_array(bo->base.base.size >> PAGE_SHIFT,
				       sizeof(*pages), GFP_KERNEL | __GFP_ZERO);
		if (!pages) {
			mutex_unlock(&bo->base.pages_lock);
			return -ENOMEM;
		}

		bo->base.pages = pages;
		bo->base.pages_use_count = 1;

		mapping_set_unevictable(mapping);
	}

	for (i = old_size >> PAGE_SHIFT; i < new_size >> PAGE_SHIFT; i++) {
		struct page *page = shmem_read_mapping_page(mapping, i);

		if (IS_ERR(page)) {
			mutex_unlock(&bo->base.pages_lock);
			return PTR_ERR(page);
		}
		pages[i] = page;
	}

	mutex_unlock(&bo->base.pages_lock);

	ret = sg_alloc_table_from_pages(&sgt, pages, i, 0,
					new_size, GFP_KERNEL);
	if (ret)
		return ret;

	if (bo->base.sgt) {
		dma_unmap_sgtable(dev, bo->base.sgt, DMA_BIDIRECTIONAL, 0);
		sg_free_table(bo->base.sgt);
	} else {
		bo->base.sgt = kmalloc(sizeof(*bo->base.sgt), GFP_KERNEL);
		if (!bo->base.sgt) {
			sg_free_table(&sgt);
			return -ENOMEM;
		}
	}

	ret = dma_map_sgtable(dev, &sgt, DMA_BIDIRECTIONAL, 0);
	if (ret) {
		sg_free_table(&sgt);
		kfree(bo->base.sgt);
		bo->base.sgt = NULL;
		return ret;
	}

	*bo->base.sgt = sgt;

	if (vm) {
		ret = lima_vm_map_bo(vm, bo, old_size >> PAGE_SHIFT);
		if (ret)
			return ret;
	}

	bo->heap_size = new_size;
	return 0;
}

int lima_gem_create_handle(struct drm_device *dev, struct drm_file *file,
			   u32 size, u32 flags, u32 *handle)
{
	int err;
	gfp_t mask;
	struct drm_gem_shmem_object *shmem;
	struct drm_gem_object *obj;
	struct lima_bo *bo;
	bool is_heap = flags & LIMA_BO_FLAG_HEAP;

	shmem = drm_gem_shmem_create(dev, size);
	if (IS_ERR(shmem))
		return PTR_ERR(shmem);

	obj = &shmem->base;

	/* Mali Utgard GPU can only support 32bit address space */
	mask = mapping_gfp_mask(obj->filp->f_mapping);
	mask &= ~__GFP_HIGHMEM;
	mask |= __GFP_DMA32;
	mapping_set_gfp_mask(obj->filp->f_mapping, mask);

	if (is_heap) {
		bo = to_lima_bo(obj);
		err = lima_heap_alloc(bo, NULL);
		if (err)
			goto out;
	} else {
		struct sg_table *sgt = drm_gem_shmem_get_pages_sgt(shmem);

		if (IS_ERR(sgt)) {
			err = PTR_ERR(sgt);
			goto out;
		}
	}

	err = drm_gem_handle_create(file, obj, handle);

out:
	/* drop reference from allocate - handle holds it now */
	drm_gem_object_put(obj);

	return err;
}

static void lima_gem_free_object(struct drm_gem_object *obj)
{
	struct lima_bo *bo = to_lima_bo(obj);

	if (!list_empty(&bo->va))
		dev_err(obj->dev->dev, "lima gem free bo still has va\n");

	drm_gem_shmem_free(&bo->base);
}

static int lima_gem_object_open(struct drm_gem_object *obj, struct drm_file *file)
{
	struct lima_bo *bo = to_lima_bo(obj);
	struct lima_drm_priv *priv = to_lima_drm_priv(file);
	struct lima_vm *vm = priv->vm;

	return lima_vm_bo_add(vm, bo, true);
}

static void lima_gem_object_close(struct drm_gem_object *obj, struct drm_file *file)
{
	struct lima_bo *bo = to_lima_bo(obj);
	struct lima_drm_priv *priv = to_lima_drm_priv(file);
	struct lima_vm *vm = priv->vm;

	lima_vm_bo_del(vm, bo);
}

static int lima_gem_pin(struct drm_gem_object *obj)
{
	struct lima_bo *bo = to_lima_bo(obj);

	if (bo->heap_size)
		return -EINVAL;

	return drm_gem_shmem_pin(&bo->base);
}

static int lima_gem_vmap(struct drm_gem_object *obj, struct iosys_map *map)
{
	struct lima_bo *bo = to_lima_bo(obj);

	if (bo->heap_size)
		return -EINVAL;

	return drm_gem_shmem_vmap(&bo->base, map);
}

static int lima_gem_mmap(struct drm_gem_object *obj, struct vm_area_struct *vma)
{
	struct lima_bo *bo = to_lima_bo(obj);

	if (bo->heap_size)
		return -EINVAL;

	return drm_gem_shmem_mmap(&bo->base, vma);
}

static const struct drm_gem_object_funcs lima_gem_funcs = {
	.free = lima_gem_free_object,
	.open = lima_gem_object_open,
	.close = lima_gem_object_close,
	.print_info = drm_gem_shmem_object_print_info,
	.pin = lima_gem_pin,
	.unpin = drm_gem_shmem_object_unpin,
	.get_sg_table = drm_gem_shmem_object_get_sg_table,
	.vmap = lima_gem_vmap,
	.vunmap = drm_gem_shmem_object_vunmap,
	.mmap = lima_gem_mmap,
	.vm_ops = &drm_gem_shmem_vm_ops,
};

struct drm_gem_object *lima_gem_create_object(struct drm_device *dev, size_t size)
{
	struct lima_bo *bo;

	bo = kzalloc(sizeof(*bo), GFP_KERNEL);
	if (!bo)
		return ERR_PTR(-ENOMEM);

	mutex_init(&bo->lock);
	INIT_LIST_HEAD(&bo->va);
	bo->base.map_wc = true;
	bo->base.base.funcs = &lima_gem_funcs;

	return &bo->base.base;
}

int lima_gem_get_info(struct drm_file *file, u32 handle, u32 *va, u64 *offset)
{
	struct drm_gem_object *obj;
	struct lima_bo *bo;
	struct lima_drm_priv *priv = to_lima_drm_priv(file);
	struct lima_vm *vm = priv->vm;

	obj = drm_gem_object_lookup(file, handle);
	if (!obj)
		return -ENOENT;

	bo = to_lima_bo(obj);

	*va = lima_vm_get_va(vm, bo);

	*offset = drm_vma_node_offset_addr(&obj->vma_node);

	drm_gem_object_put(obj);
	return 0;
}

static int lima_gem_sync_bo(struct lima_sched_task *task, struct lima_bo *bo,
			    bool write, bool explicit)
{
	int err;

	err = dma_resv_reserve_fences(lima_bo_resv(bo), 1);
	if (err)
		return err;

	/* explicit sync use user passed dep fence */
	if (explicit)
		return 0;

	return drm_sched_job_add_implicit_dependencies(&task->base,
						       &bo->base.base,
						       write);
}

static int lima_gem_add_deps(struct drm_file *file, struct lima_submit *submit)
{
	int i, err;

	for (i = 0; i < ARRAY_SIZE(submit->in_sync); i++) {
		struct dma_fence *fence = NULL;

		if (!submit->in_sync[i])
			continue;

		err = drm_syncobj_find_fence(file, submit->in_sync[i],
					     0, 0, &fence);
		if (err)
			return err;

		err = drm_sched_job_add_dependency(&submit->task->base, fence);
		if (err) {
			dma_fence_put(fence);
			return err;
		}
	}

	return 0;
}

int lima_gem_submit(struct drm_file *file, struct lima_submit *submit)
{
	int i, err = 0;
	struct ww_acquire_ctx ctx;
	struct lima_drm_priv *priv = to_lima_drm_priv(file);
	struct lima_vm *vm = priv->vm;
	struct drm_syncobj *out_sync = NULL;
	struct dma_fence *fence;
	struct lima_bo **bos = submit->lbos;

	if (submit->out_sync) {
		out_sync = drm_syncobj_find(file, submit->out_sync);
		if (!out_sync)
			return -ENOENT;
	}

	for (i = 0; i < submit->nr_bos; i++) {
		struct drm_gem_object *obj;
		struct lima_bo *bo;

		obj = drm_gem_object_lookup(file, submit->bos[i].handle);
		if (!obj) {
			err = -ENOENT;
			goto err_out0;
		}

		bo = to_lima_bo(obj);

		/* increase refcnt of gpu va map to prevent unmapped when executing,
		 * will be decreased when task done
		 */
		err = lima_vm_bo_add(vm, bo, false);
		if (err) {
			drm_gem_object_put(obj);
			goto err_out0;
		}

		bos[i] = bo;
	}

	err = drm_gem_lock_reservations((struct drm_gem_object **)bos,
					submit->nr_bos, &ctx);
	if (err)
		goto err_out0;

	err = lima_sched_task_init(
		submit->task, submit->ctx->context + submit->pipe,
		bos, submit->nr_bos, vm);
	if (err)
		goto err_out1;

	err = lima_gem_add_deps(file, submit);
	if (err)
		goto err_out2;

	for (i = 0; i < submit->nr_bos; i++) {
		err = lima_gem_sync_bo(
			submit->task, bos[i],
			submit->bos[i].flags & LIMA_SUBMIT_BO_WRITE,
			submit->flags & LIMA_SUBMIT_FLAG_EXPLICIT_FENCE);
		if (err)
			goto err_out2;
	}

	fence = lima_sched_context_queue_task(submit->task);

	for (i = 0; i < submit->nr_bos; i++) {
		dma_resv_add_fence(lima_bo_resv(bos[i]), fence,
				   submit->bos[i].flags & LIMA_SUBMIT_BO_WRITE ?
				   DMA_RESV_USAGE_WRITE : DMA_RESV_USAGE_READ);
	}

	drm_gem_unlock_reservations((struct drm_gem_object **)bos,
				    submit->nr_bos, &ctx);

	for (i = 0; i < submit->nr_bos; i++)
		drm_gem_object_put(&bos[i]->base.base);

	if (out_sync) {
		drm_syncobj_replace_fence(out_sync, fence);
		drm_syncobj_put(out_sync);
	}

	dma_fence_put(fence);

	return 0;

err_out2:
	lima_sched_task_fini(submit->task);
err_out1:
	drm_gem_unlock_reservations((struct drm_gem_object **)bos,
				    submit->nr_bos, &ctx);
err_out0:
	for (i = 0; i < submit->nr_bos; i++) {
		if (!bos[i])
			break;
		lima_vm_bo_del(vm, bos[i]);
		drm_gem_object_put(&bos[i]->base.base);
	}
	if (out_sync)
		drm_syncobj_put(out_sync);
	return err;
}

int lima_gem_wait(struct drm_file *file, u32 handle, u32 op, s64 timeout_ns)
{
	bool write = op & LIMA_GEM_WAIT_WRITE;
	long ret, timeout;

	if (!op)
		return 0;

	timeout = drm_timeout_abs_to_jiffies(timeout_ns);

	ret = drm_gem_dma_resv_wait(file, handle, write, timeout);
	if (ret == -ETIME)
		ret = timeout ? -ETIMEDOUT : -EBUSY;

	return ret;
}