summaryrefslogtreecommitdiffstats
path: root/drivers/gpu/drm/tegra/vic.c
blob: cd804e404a1194d39b18b1575cee3ec632a9b1ba (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
/*
 * Copyright (c) 2015, NVIDIA Corporation.
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License version 2 as
 * published by the Free Software Foundation.
 */

#include <linux/clk.h>
#include <linux/host1x.h>
#include <linux/iommu.h>
#include <linux/module.h>
#include <linux/of.h>
#include <linux/of_device.h>
#include <linux/of_platform.h>
#include <linux/platform_device.h>
#include <linux/pm_runtime.h>
#include <linux/reset.h>

#include <soc/tegra/pmc.h>

#include "drm.h"
#include "falcon.h"
#include "vic.h"

struct vic_config {
	const char *firmware;
};

struct vic {
	struct falcon falcon;
	bool booted;

	void __iomem *regs;
	struct tegra_drm_client client;
	struct host1x_channel *channel;
	struct iommu_domain *domain;
	struct device *dev;
	struct clk *clk;

	/* Platform configuration */
	const struct vic_config *config;
};

static inline struct vic *to_vic(struct tegra_drm_client *client)
{
	return container_of(client, struct vic, client);
}

static void vic_writel(struct vic *vic, u32 value, unsigned int offset)
{
	writel(value, vic->regs + offset);
}

static int vic_runtime_resume(struct device *dev)
{
	struct vic *vic = dev_get_drvdata(dev);

	return clk_prepare_enable(vic->clk);
}

static int vic_runtime_suspend(struct device *dev)
{
	struct vic *vic = dev_get_drvdata(dev);

	clk_disable_unprepare(vic->clk);

	vic->booted = false;

	return 0;
}

static int vic_boot(struct vic *vic)
{
	u32 fce_ucode_size, fce_bin_data_offset;
	void *hdr;
	int err = 0;

	if (vic->booted)
		return 0;

	/* setup clockgating registers */
	vic_writel(vic, CG_IDLE_CG_DLY_CNT(4) |
			CG_IDLE_CG_EN |
			CG_WAKEUP_DLY_CNT(4),
		   NV_PVIC_MISC_PRI_VIC_CG);

	err = falcon_boot(&vic->falcon);
	if (err < 0)
		return err;

	hdr = vic->falcon.firmware.vaddr;
	fce_bin_data_offset = *(u32 *)(hdr + VIC_UCODE_FCE_DATA_OFFSET);
	hdr = vic->falcon.firmware.vaddr +
		*(u32 *)(hdr + VIC_UCODE_FCE_HEADER_OFFSET);
	fce_ucode_size = *(u32 *)(hdr + FCE_UCODE_SIZE_OFFSET);

	falcon_execute_method(&vic->falcon, VIC_SET_APPLICATION_ID, 1);
	falcon_execute_method(&vic->falcon, VIC_SET_FCE_UCODE_SIZE,
			      fce_ucode_size);
	falcon_execute_method(&vic->falcon, VIC_SET_FCE_UCODE_OFFSET,
			      (vic->falcon.firmware.paddr + fce_bin_data_offset)
				>> 8);

	err = falcon_wait_idle(&vic->falcon);
	if (err < 0) {
		dev_err(vic->dev,
			"failed to set application ID and FCE base\n");
		return err;
	}

	vic->booted = true;

	return 0;
}

static void *vic_falcon_alloc(struct falcon *falcon, size_t size,
			       dma_addr_t *iova)
{
	struct tegra_drm *tegra = falcon->data;

	return tegra_drm_alloc(tegra, size, iova);
}

static void vic_falcon_free(struct falcon *falcon, size_t size,
			    dma_addr_t iova, void *va)
{
	struct tegra_drm *tegra = falcon->data;

	return tegra_drm_free(tegra, size, va, iova);
}

static const struct falcon_ops vic_falcon_ops = {
	.alloc = vic_falcon_alloc,
	.free = vic_falcon_free
};

static int vic_init(struct host1x_client *client)
{
	struct tegra_drm_client *drm = host1x_to_drm_client(client);
	struct drm_device *dev = dev_get_drvdata(client->parent);
	struct tegra_drm *tegra = dev->dev_private;
	struct vic *vic = to_vic(drm);
	int err;

	if (tegra->domain) {
		err = iommu_attach_device(tegra->domain, vic->dev);
		if (err < 0) {
			dev_err(vic->dev, "failed to attach to domain: %d\n",
				err);
			return err;
		}

		vic->domain = tegra->domain;
	}

	if (!vic->falcon.data) {
		vic->falcon.data = tegra;
		err = falcon_load_firmware(&vic->falcon);
		if (err < 0)
			goto detach_device;
	}

	vic->channel = host1x_channel_request(client->dev);
	if (!vic->channel) {
		err = -ENOMEM;
		goto detach_device;
	}

	client->syncpts[0] = host1x_syncpt_request(client->dev, 0);
	if (!client->syncpts[0]) {
		err = -ENOMEM;
		goto free_channel;
	}

	err = tegra_drm_register_client(tegra, drm);
	if (err < 0)
		goto free_syncpt;

	return 0;

free_syncpt:
	host1x_syncpt_free(client->syncpts[0]);
free_channel:
	host1x_channel_free(vic->channel);
detach_device:
	if (tegra->domain)
		iommu_detach_device(tegra->domain, vic->dev);

	return err;
}

static int vic_exit(struct host1x_client *client)
{
	struct tegra_drm_client *drm = host1x_to_drm_client(client);
	struct drm_device *dev = dev_get_drvdata(client->parent);
	struct tegra_drm *tegra = dev->dev_private;
	struct vic *vic = to_vic(drm);
	int err;

	err = tegra_drm_unregister_client(tegra, drm);
	if (err < 0)
		return err;

	host1x_syncpt_free(client->syncpts[0]);
	host1x_channel_free(vic->channel);

	if (vic->domain) {
		iommu_detach_device(vic->domain, vic->dev);
		vic->domain = NULL;
	}

	return 0;
}

static const struct host1x_client_ops vic_client_ops = {
	.init = vic_init,
	.exit = vic_exit,
};

static int vic_open_channel(struct tegra_drm_client *client,
			    struct tegra_drm_context *context)
{
	struct vic *vic = to_vic(client);
	int err;

	err = pm_runtime_get_sync(vic->dev);
	if (err < 0)
		return err;

	err = vic_boot(vic);
	if (err < 0) {
		pm_runtime_put(vic->dev);
		return err;
	}

	context->channel = host1x_channel_get(vic->channel);
	if (!context->channel) {
		pm_runtime_put(vic->dev);
		return -ENOMEM;
	}

	return 0;
}

static void vic_close_channel(struct tegra_drm_context *context)
{
	struct vic *vic = to_vic(context->client);

	host1x_channel_put(context->channel);

	pm_runtime_put(vic->dev);
}

static const struct tegra_drm_client_ops vic_ops = {
	.open_channel = vic_open_channel,
	.close_channel = vic_close_channel,
	.submit = tegra_drm_submit,
};

static const struct vic_config vic_t124_config = {
	.firmware = "nvidia/tegra124/vic03_ucode.bin",
};

static const struct vic_config vic_t210_config = {
	.firmware = "nvidia/tegra210/vic04_ucode.bin",
};

static const struct of_device_id vic_match[] = {
	{ .compatible = "nvidia,tegra124-vic", .data = &vic_t124_config },
	{ .compatible = "nvidia,tegra210-vic", .data = &vic_t210_config },
	{ },
};

static int vic_probe(struct platform_device *pdev)
{
	struct vic_config *vic_config = NULL;
	struct device *dev = &pdev->dev;
	struct host1x_syncpt **syncpts;
	struct resource *regs;
	const struct of_device_id *match;
	struct vic *vic;
	int err;

	match = of_match_device(vic_match, dev);
	vic_config = (struct vic_config *)match->data;

	vic = devm_kzalloc(dev, sizeof(*vic), GFP_KERNEL);
	if (!vic)
		return -ENOMEM;

	syncpts = devm_kzalloc(dev, sizeof(*syncpts), GFP_KERNEL);
	if (!syncpts)
		return -ENOMEM;

	regs = platform_get_resource(pdev, IORESOURCE_MEM, 0);
	if (!regs) {
		dev_err(&pdev->dev, "failed to get registers\n");
		return -ENXIO;
	}

	vic->regs = devm_ioremap_resource(dev, regs);
	if (IS_ERR(vic->regs))
		return PTR_ERR(vic->regs);

	vic->clk = devm_clk_get(dev, NULL);
	if (IS_ERR(vic->clk)) {
		dev_err(&pdev->dev, "failed to get clock\n");
		return PTR_ERR(vic->clk);
	}

	vic->falcon.dev = dev;
	vic->falcon.regs = vic->regs;
	vic->falcon.ops = &vic_falcon_ops;

	err = falcon_init(&vic->falcon);
	if (err < 0)
		return err;

	err = falcon_read_firmware(&vic->falcon, vic_config->firmware);
	if (err < 0)
		goto exit_falcon;

	platform_set_drvdata(pdev, vic);

	INIT_LIST_HEAD(&vic->client.base.list);
	vic->client.base.ops = &vic_client_ops;
	vic->client.base.dev = dev;
	vic->client.base.class = HOST1X_CLASS_VIC;
	vic->client.base.syncpts = syncpts;
	vic->client.base.num_syncpts = 1;
	vic->dev = dev;
	vic->config = vic_config;

	INIT_LIST_HEAD(&vic->client.list);
	vic->client.ops = &vic_ops;

	err = host1x_client_register(&vic->client.base);
	if (err < 0) {
		dev_err(dev, "failed to register host1x client: %d\n", err);
		platform_set_drvdata(pdev, NULL);
		goto exit_falcon;
	}

	pm_runtime_enable(&pdev->dev);
	if (!pm_runtime_enabled(&pdev->dev)) {
		err = vic_runtime_resume(&pdev->dev);
		if (err < 0)
			goto unregister_client;
	}

	return 0;

unregister_client:
	host1x_client_unregister(&vic->client.base);
exit_falcon:
	falcon_exit(&vic->falcon);

	return err;
}

static int vic_remove(struct platform_device *pdev)
{
	struct vic *vic = platform_get_drvdata(pdev);
	int err;

	err = host1x_client_unregister(&vic->client.base);
	if (err < 0) {
		dev_err(&pdev->dev, "failed to unregister host1x client: %d\n",
			err);
		return err;
	}

	if (pm_runtime_enabled(&pdev->dev))
		pm_runtime_disable(&pdev->dev);
	else
		vic_runtime_suspend(&pdev->dev);

	falcon_exit(&vic->falcon);

	return 0;
}

static const struct dev_pm_ops vic_pm_ops = {
	SET_RUNTIME_PM_OPS(vic_runtime_suspend, vic_runtime_resume, NULL)
};

struct platform_driver tegra_vic_driver = {
	.driver = {
		.name = "tegra-vic",
		.of_match_table = vic_match,
		.pm = &vic_pm_ops
	},
	.probe = vic_probe,
	.remove = vic_remove,
};