summaryrefslogtreecommitdiff
path: root/drivers/gpu/drm/panfrost/panfrost_drv.c
blob: c06af78ab8338355ac41273e0bb8985fbd569f67 (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
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
// SPDX-License-Identifier: GPL-2.0
/* Copyright 2018 Marty E. Plummer <hanetzer@startmail.com> */
/* Copyright 2019 Linaro, Ltd., Rob Herring <robh@kernel.org> */
/* Copyright 2019 Collabora ltd. */

#include <linux/bitfield.h>
#include <linux/dma-mapping.h>
#include <linux/module.h>
#include <linux/of_platform.h>
#include <linux/pagemap.h>
#include <linux/pm_runtime.h>
#include <drm/panfrost_drm.h>
#include <drm/drm_drv.h>
#include <drm/drm_ioctl.h>
#include <drm/drm_syncobj.h>
#include <drm/drm_utils.h>

#include "panfrost_device.h"
#include "panfrost_devfreq.h"
#include "panfrost_gem.h"
#include "panfrost_mmu.h"
#include "panfrost_job.h"
#include "panfrost_gpu.h"

static int panfrost_ioctl_get_param(struct drm_device *ddev, void *data, struct drm_file *file)
{
	struct drm_panfrost_get_param *param = data;
	struct panfrost_device *pfdev = ddev->dev_private;

	if (param->pad != 0)
		return -EINVAL;

	switch (param->param) {
	case DRM_PANFROST_PARAM_GPU_PROD_ID:
		param->value = pfdev->features.id;
		break;
	default:
		return -EINVAL;
	}

	return 0;
}

static int panfrost_ioctl_create_bo(struct drm_device *dev, void *data,
		struct drm_file *file)
{
	int ret;
	struct drm_gem_shmem_object *shmem;
	struct drm_panfrost_create_bo *args = data;

	if (!args->size || args->flags || args->pad)
		return -EINVAL;

	shmem = drm_gem_shmem_create_with_handle(file, dev, args->size,
						 &args->handle);
	if (IS_ERR(shmem))
		return PTR_ERR(shmem);

	ret = panfrost_mmu_map(to_panfrost_bo(&shmem->base));
	if (ret)
		goto err_free;

	args->offset = to_panfrost_bo(&shmem->base)->node.start << PAGE_SHIFT;

	return 0;

err_free:
	drm_gem_object_put_unlocked(&shmem->base);
	return ret;
}

/**
 * panfrost_lookup_bos() - Sets up job->bo[] with the GEM objects
 * referenced by the job.
 * @dev: DRM device
 * @file_priv: DRM file for this fd
 * @args: IOCTL args
 * @job: job being set up
 *
 * Resolve handles from userspace to BOs and attach them to job.
 *
 * Note that this function doesn't need to unreference the BOs on
 * failure, because that will happen at panfrost_job_cleanup() time.
 */
static int
panfrost_lookup_bos(struct drm_device *dev,
		  struct drm_file *file_priv,
		  struct drm_panfrost_submit *args,
		  struct panfrost_job *job)
{
	job->bo_count = args->bo_handle_count;

	if (!job->bo_count)
		return 0;

	job->implicit_fences = kvmalloc_array(job->bo_count,
				  sizeof(struct dma_fence *),
				  GFP_KERNEL | __GFP_ZERO);
	if (!job->implicit_fences)
		return -ENOMEM;

	return drm_gem_objects_lookup(file_priv,
				      (void __user *)(uintptr_t)args->bo_handles,
				      job->bo_count, &job->bos);
}

/**
 * panfrost_copy_in_sync() - Sets up job->in_fences[] with the sync objects
 * referenced by the job.
 * @dev: DRM device
 * @file_priv: DRM file for this fd
 * @args: IOCTL args
 * @job: job being set up
 *
 * Resolve syncobjs from userspace to fences and attach them to job.
 *
 * Note that this function doesn't need to unreference the fences on
 * failure, because that will happen at panfrost_job_cleanup() time.
 */
static int
panfrost_copy_in_sync(struct drm_device *dev,
		  struct drm_file *file_priv,
		  struct drm_panfrost_submit *args,
		  struct panfrost_job *job)
{
	u32 *handles;
	int ret = 0;
	int i;

	job->in_fence_count = args->in_sync_count;

	if (!job->in_fence_count)
		return 0;

	job->in_fences = kvmalloc_array(job->in_fence_count,
					sizeof(struct dma_fence *),
					GFP_KERNEL | __GFP_ZERO);
	if (!job->in_fences) {
		DRM_DEBUG("Failed to allocate job in fences\n");
		return -ENOMEM;
	}

	handles = kvmalloc_array(job->in_fence_count, sizeof(u32), GFP_KERNEL);
	if (!handles) {
		ret = -ENOMEM;
		DRM_DEBUG("Failed to allocate incoming syncobj handles\n");
		goto fail;
	}

	if (copy_from_user(handles,
			   (void __user *)(uintptr_t)args->in_syncs,
			   job->in_fence_count * sizeof(u32))) {
		ret = -EFAULT;
		DRM_DEBUG("Failed to copy in syncobj handles\n");
		goto fail;
	}

	for (i = 0; i < job->in_fence_count; i++) {
		ret = drm_syncobj_find_fence(file_priv, handles[i], 0, 0,
					     &job->in_fences[i]);
		if (ret == -EINVAL)
			goto fail;
	}

fail:
	kvfree(handles);
	return ret;
}

static int panfrost_ioctl_submit(struct drm_device *dev, void *data,
		struct drm_file *file)
{
	struct panfrost_device *pfdev = dev->dev_private;
	struct drm_panfrost_submit *args = data;
	struct drm_syncobj *sync_out;
	struct panfrost_job *job;
	int ret = 0;

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

	kref_init(&job->refcount);

	job->pfdev = pfdev;
	job->jc = args->jc;
	job->requirements = args->requirements;
	job->flush_id = panfrost_gpu_get_latest_flush_id(pfdev);
	job->file_priv = file->driver_priv;

	ret = panfrost_copy_in_sync(dev, file, args, job);
	if (ret)
		goto fail;

	ret = panfrost_lookup_bos(dev, file, args, job);
	if (ret)
		goto fail;

	ret = panfrost_job_push(job);
	if (ret)
		goto fail;

	/* Update the return sync object for the job */
	sync_out = drm_syncobj_find(file, args->out_sync);
	if (sync_out) {
		drm_syncobj_replace_fence(sync_out, job->render_done_fence);
		drm_syncobj_put(sync_out);
	}

fail:
	panfrost_job_put(job);

	return ret;
}

static int
panfrost_ioctl_wait_bo(struct drm_device *dev, void *data,
		       struct drm_file *file_priv)
{
	long ret;
	struct drm_panfrost_wait_bo *args = data;
	struct drm_gem_object *gem_obj;
	unsigned long timeout = drm_timeout_abs_to_jiffies(args->timeout_ns);

	if (args->pad)
		return -EINVAL;

	gem_obj = drm_gem_object_lookup(file_priv, args->handle);
	if (!gem_obj)
		return -ENOENT;

	ret = reservation_object_wait_timeout_rcu(gem_obj->resv, true,
						  true, timeout);
	if (!ret)
		ret = timeout ? -ETIMEDOUT : -EBUSY;

	drm_gem_object_put_unlocked(gem_obj);

	return ret;
}

static int panfrost_ioctl_mmap_bo(struct drm_device *dev, void *data,
		      struct drm_file *file_priv)
{
	struct drm_panfrost_mmap_bo *args = data;
	struct drm_gem_object *gem_obj;
	int ret;

	if (args->flags != 0) {
		DRM_INFO("unknown mmap_bo flags: %d\n", args->flags);
		return -EINVAL;
	}

	gem_obj = drm_gem_object_lookup(file_priv, args->handle);
	if (!gem_obj) {
		DRM_DEBUG("Failed to look up GEM BO %d\n", args->handle);
		return -ENOENT;
	}

	ret = drm_gem_create_mmap_offset(gem_obj);
	if (ret == 0)
		args->offset = drm_vma_node_offset_addr(&gem_obj->vma_node);
	drm_gem_object_put_unlocked(gem_obj);

	return ret;
}

static int panfrost_ioctl_get_bo_offset(struct drm_device *dev, void *data,
			    struct drm_file *file_priv)
{
	struct drm_panfrost_get_bo_offset *args = data;
	struct drm_gem_object *gem_obj;
	struct panfrost_gem_object *bo;

	gem_obj = drm_gem_object_lookup(file_priv, args->handle);
	if (!gem_obj) {
		DRM_DEBUG("Failed to look up GEM BO %d\n", args->handle);
		return -ENOENT;
	}
	bo = to_panfrost_bo(gem_obj);

	args->offset = bo->node.start << PAGE_SHIFT;

	drm_gem_object_put_unlocked(gem_obj);
	return 0;
}

static int
panfrost_open(struct drm_device *dev, struct drm_file *file)
{
	struct panfrost_device *pfdev = dev->dev_private;
	struct panfrost_file_priv *panfrost_priv;

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

	panfrost_priv->pfdev = pfdev;
	file->driver_priv = panfrost_priv;

	return panfrost_job_open(panfrost_priv);
}

static void
panfrost_postclose(struct drm_device *dev, struct drm_file *file)
{
	struct panfrost_file_priv *panfrost_priv = file->driver_priv;

	panfrost_job_close(panfrost_priv);

	kfree(panfrost_priv);
}

/* DRM_AUTH is required on SUBMIT for now, while all clients share a single
 * address space.  Note that render nodes would be able to submit jobs that
 * could access BOs from clients authenticated with the master node.
 */
static const struct drm_ioctl_desc panfrost_drm_driver_ioctls[] = {
#define PANFROST_IOCTL(n, func, flags) \
	DRM_IOCTL_DEF_DRV(PANFROST_##n, panfrost_ioctl_##func, flags)

	PANFROST_IOCTL(SUBMIT,		submit,		DRM_RENDER_ALLOW | DRM_AUTH),
	PANFROST_IOCTL(WAIT_BO,		wait_bo,	DRM_RENDER_ALLOW),
	PANFROST_IOCTL(CREATE_BO,	create_bo,	DRM_RENDER_ALLOW),
	PANFROST_IOCTL(MMAP_BO,		mmap_bo,	DRM_RENDER_ALLOW),
	PANFROST_IOCTL(GET_PARAM,	get_param,	DRM_RENDER_ALLOW),
	PANFROST_IOCTL(GET_BO_OFFSET,	get_bo_offset,	DRM_RENDER_ALLOW),
};

DEFINE_DRM_GEM_SHMEM_FOPS(panfrost_drm_driver_fops);

static struct drm_driver panfrost_drm_driver = {
	.driver_features	= DRIVER_RENDER | DRIVER_GEM | DRIVER_PRIME |
				  DRIVER_SYNCOBJ,
	.open			= panfrost_open,
	.postclose		= panfrost_postclose,
	.ioctls			= panfrost_drm_driver_ioctls,
	.num_ioctls		= ARRAY_SIZE(panfrost_drm_driver_ioctls),
	.fops			= &panfrost_drm_driver_fops,
	.name			= "panfrost",
	.desc			= "panfrost DRM",
	.date			= "20180908",
	.major			= 1,
	.minor			= 0,

	.gem_create_object	= panfrost_gem_create_object,
	.prime_handle_to_fd	= drm_gem_prime_handle_to_fd,
	.prime_fd_to_handle	= drm_gem_prime_fd_to_handle,
	.gem_prime_import_sg_table = panfrost_gem_prime_import_sg_table,
	.gem_prime_mmap		= drm_gem_prime_mmap,
};

static int panfrost_probe(struct platform_device *pdev)
{
	struct panfrost_device *pfdev;
	struct drm_device *ddev;
	int err;

	pfdev = devm_kzalloc(&pdev->dev, sizeof(*pfdev), GFP_KERNEL);
	if (!pfdev)
		return -ENOMEM;

	pfdev->pdev = pdev;
	pfdev->dev = &pdev->dev;

	platform_set_drvdata(pdev, pfdev);

	/* Allocate and initialze the DRM device. */
	ddev = drm_dev_alloc(&panfrost_drm_driver, &pdev->dev);
	if (IS_ERR(ddev))
		return PTR_ERR(ddev);

	ddev->dev_private = pfdev;
	pfdev->ddev = ddev;

	spin_lock_init(&pfdev->mm_lock);

	/* 4G enough for now. can be 48-bit */
	drm_mm_init(&pfdev->mm, SZ_32M >> PAGE_SHIFT, (SZ_4G - SZ_32M) >> PAGE_SHIFT);

	pm_runtime_use_autosuspend(pfdev->dev);
	pm_runtime_set_autosuspend_delay(pfdev->dev, 50); /* ~3 frames */
	pm_runtime_enable(pfdev->dev);

	err = panfrost_device_init(pfdev);
	if (err) {
		dev_err(&pdev->dev, "Fatal error during GPU init\n");
		goto err_out0;
	}

	dma_set_mask_and_coherent(pfdev->dev,
		DMA_BIT_MASK(FIELD_GET(0xff00, pfdev->features.mmu_features)));

	err = panfrost_devfreq_init(pfdev);
	if (err) {
		dev_err(&pdev->dev, "Fatal error during devfreq init\n");
		goto err_out1;
	}

	/*
	 * Register the DRM device with the core and the connectors with
	 * sysfs
	 */
	err = drm_dev_register(ddev, 0);
	if (err < 0)
		goto err_out1;

	return 0;

err_out1:
	panfrost_device_fini(pfdev);
err_out0:
	drm_dev_put(ddev);
	return err;
}

static int panfrost_remove(struct platform_device *pdev)
{
	struct panfrost_device *pfdev = platform_get_drvdata(pdev);
	struct drm_device *ddev = pfdev->ddev;

	drm_dev_unregister(ddev);
	pm_runtime_get_sync(pfdev->dev);
	pm_runtime_put_sync_autosuspend(pfdev->dev);
	pm_runtime_disable(pfdev->dev);
	panfrost_device_fini(pfdev);
	drm_dev_put(ddev);
	return 0;
}

static const struct of_device_id dt_match[] = {
	{ .compatible = "arm,mali-t604" },
	{ .compatible = "arm,mali-t624" },
	{ .compatible = "arm,mali-t628" },
	{ .compatible = "arm,mali-t720" },
	{ .compatible = "arm,mali-t760" },
	{ .compatible = "arm,mali-t820" },
	{ .compatible = "arm,mali-t830" },
	{ .compatible = "arm,mali-t860" },
	{ .compatible = "arm,mali-t880" },
	{}
};
MODULE_DEVICE_TABLE(of, dt_match);

static const struct dev_pm_ops panfrost_pm_ops = {
	SET_SYSTEM_SLEEP_PM_OPS(pm_runtime_force_suspend, pm_runtime_force_resume)
	SET_RUNTIME_PM_OPS(panfrost_device_suspend, panfrost_device_resume, NULL)
};

static struct platform_driver panfrost_driver = {
	.probe		= panfrost_probe,
	.remove		= panfrost_remove,
	.driver		= {
		.name	= "panfrost",
		.pm	= &panfrost_pm_ops,
		.of_match_table = dt_match,
	},
};
module_platform_driver(panfrost_driver);

MODULE_AUTHOR("Panfrost Project Developers");
MODULE_DESCRIPTION("Panfrost DRM Driver");
MODULE_LICENSE("GPL v2");