summaryrefslogtreecommitdiffstats
path: root/drivers/gpu/host1x/drm/gr2d.c
blob: 4e407e30da1cd2c5fd9cb4e56f133f93887b1e2a (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
/*
 * Copyright (c) 2012-2013, NVIDIA Corporation.
 *
 * This program is free software; you can redistribute it and/or modify it
 * under the terms and conditions of the GNU General Public License,
 * version 2, as published by the Free Software Foundation.
 *
 * This program is distributed in the hope it will be useful, but WITHOUT
 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
 * more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 */

#include <linux/clk.h>

#include "drm.h"
#include "gem.h"

#define GR2D_NUM_REGS 0x4d

struct gr2d {
	struct tegra_drm_client client;
	struct host1x_channel *channel;
	struct clk *clk;

	DECLARE_BITMAP(addr_regs, GR2D_NUM_REGS);
};

static inline struct gr2d *to_gr2d(struct tegra_drm_client *client)
{
	return container_of(client, struct gr2d, client);
}

static int gr2d_init(struct host1x_client *client)
{
	struct tegra_drm_client *drm = host1x_to_drm_client(client);
	struct tegra_drm *tegra = dev_get_drvdata(client->parent);
	struct gr2d *gr2d = to_gr2d(drm);

	gr2d->channel = host1x_channel_request(client->dev);
	if (!gr2d->channel)
		return -ENOMEM;

	client->syncpts[0] = host1x_syncpt_request(client->dev, false);
	if (!client->syncpts[0]) {
		host1x_channel_free(gr2d->channel);
		return -ENOMEM;
	}

	return tegra_drm_register_client(tegra, drm);
}

static int gr2d_exit(struct host1x_client *client)
{
	struct tegra_drm_client *drm = host1x_to_drm_client(client);
	struct tegra_drm *tegra = dev_get_drvdata(client->parent);
	struct gr2d *gr2d = to_gr2d(drm);
	int err;

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

	host1x_syncpt_free(client->syncpts[0]);
	host1x_channel_free(gr2d->channel);

	return 0;
}

static const struct host1x_client_ops gr2d_client_ops = {
	.init = gr2d_init,
	.exit = gr2d_exit,
};

static int gr2d_open_channel(struct tegra_drm_client *client,
			     struct tegra_drm_context *context)
{
	struct gr2d *gr2d = to_gr2d(client);

	context->channel = host1x_channel_get(gr2d->channel);
	if (!context->channel)
		return -ENOMEM;

	return 0;
}

static void gr2d_close_channel(struct tegra_drm_context *context)
{
	host1x_channel_put(context->channel);
}

static struct host1x_bo *host1x_bo_lookup(struct drm_device *drm,
					  struct drm_file *file,
					  u32 handle)
{
	struct drm_gem_object *gem;
	struct tegra_bo *bo;

	gem = drm_gem_object_lookup(drm, file, handle);
	if (!gem)
		return NULL;

	mutex_lock(&drm->struct_mutex);
	drm_gem_object_unreference(gem);
	mutex_unlock(&drm->struct_mutex);

	bo = to_tegra_bo(gem);
	return &bo->base;
}

static int gr2d_is_addr_reg(struct device *dev, u32 class, u32 offset)
{
	struct gr2d *gr2d = dev_get_drvdata(dev);

	switch (class) {
	case HOST1X_CLASS_HOST1X:
		if (offset == 0x2b)
			return 1;

		break;

	case HOST1X_CLASS_GR2D:
	case HOST1X_CLASS_GR2D_SB:
		if (offset >= GR2D_NUM_REGS)
			break;

		if (test_bit(offset, gr2d->addr_regs))
			return 1;

		break;
	}

	return 0;
}

static int gr2d_submit(struct tegra_drm_context *context,
		       struct drm_tegra_submit *args, struct drm_device *drm,
		       struct drm_file *file)
{
	unsigned int num_cmdbufs = args->num_cmdbufs;
	unsigned int num_relocs = args->num_relocs;
	unsigned int num_waitchks = args->num_waitchks;
	struct drm_tegra_cmdbuf __user *cmdbufs =
		(void * __user)(uintptr_t)args->cmdbufs;
	struct drm_tegra_reloc __user *relocs =
		(void * __user)(uintptr_t)args->relocs;
	struct drm_tegra_waitchk __user *waitchks =
		(void * __user)(uintptr_t)args->waitchks;
	struct drm_tegra_syncpt syncpt;
	struct host1x_job *job;
	int err;

	/* We don't yet support other than one syncpt_incr struct per submit */
	if (args->num_syncpts != 1)
		return -EINVAL;

	job = host1x_job_alloc(context->channel, args->num_cmdbufs,
			       args->num_relocs, args->num_waitchks);
	if (!job)
		return -ENOMEM;

	job->num_relocs = args->num_relocs;
	job->num_waitchk = args->num_waitchks;
	job->client = (u32)args->context;
	job->class = context->client->base.class;
	job->serialize = true;

	while (num_cmdbufs) {
		struct drm_tegra_cmdbuf cmdbuf;
		struct host1x_bo *bo;

		err = copy_from_user(&cmdbuf, cmdbufs, sizeof(cmdbuf));
		if (err)
			goto fail;

		bo = host1x_bo_lookup(drm, file, cmdbuf.handle);
		if (!bo) {
			err = -ENOENT;
			goto fail;
		}

		host1x_job_add_gather(job, bo, cmdbuf.words, cmdbuf.offset);
		num_cmdbufs--;
		cmdbufs++;
	}

	err = copy_from_user(job->relocarray, relocs,
			     sizeof(*relocs) * num_relocs);
	if (err)
		goto fail;

	while (num_relocs--) {
		struct host1x_reloc *reloc = &job->relocarray[num_relocs];
		struct host1x_bo *cmdbuf, *target;

		cmdbuf = host1x_bo_lookup(drm, file, (u32)reloc->cmdbuf);
		target = host1x_bo_lookup(drm, file, (u32)reloc->target);

		reloc->cmdbuf = cmdbuf;
		reloc->target = target;

		if (!reloc->target || !reloc->cmdbuf) {
			err = -ENOENT;
			goto fail;
		}
	}

	err = copy_from_user(job->waitchk, waitchks,
			     sizeof(*waitchks) * num_waitchks);
	if (err)
		goto fail;

	err = copy_from_user(&syncpt, (void * __user)(uintptr_t)args->syncpts,
			     sizeof(syncpt));
	if (err)
		goto fail;

	job->syncpt_id = syncpt.id;
	job->syncpt_incrs = syncpt.incrs;
	job->timeout = 10000;
	job->is_addr_reg = gr2d_is_addr_reg;

	if (args->timeout && args->timeout < 10000)
		job->timeout = args->timeout;

	err = host1x_job_pin(job, context->client->base.dev);
	if (err)
		goto fail;

	err = host1x_job_submit(job);
	if (err)
		goto fail_submit;

	args->fence = job->syncpt_end;

	host1x_job_put(job);
	return 0;

fail_submit:
	host1x_job_unpin(job);
fail:
	host1x_job_put(job);
	return err;
}

static const struct tegra_drm_client_ops gr2d_ops = {
	.open_channel = gr2d_open_channel,
	.close_channel = gr2d_close_channel,
	.submit = gr2d_submit,
};

static const struct of_device_id gr2d_match[] = {
	{ .compatible = "nvidia,tegra30-gr2d" },
	{ .compatible = "nvidia,tegra20-gr2d" },
	{ },
};

static const u32 gr2d_addr_regs[] = {
	0x1a, 0x1b, 0x26, 0x2b, 0x2c, 0x2d, 0x31, 0x32,
	0x48, 0x49, 0x4a, 0x4b, 0x4c
};

static int gr2d_probe(struct platform_device *pdev)
{
	struct device *dev = &pdev->dev;
	struct host1x_syncpt **syncpts;
	struct gr2d *gr2d;
	unsigned int i;
	int err;

	gr2d = devm_kzalloc(dev, sizeof(*gr2d), GFP_KERNEL);
	if (!gr2d)
		return -ENOMEM;

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

	gr2d->clk = devm_clk_get(dev, NULL);
	if (IS_ERR(gr2d->clk)) {
		dev_err(dev, "cannot get clock\n");
		return PTR_ERR(gr2d->clk);
	}

	err = clk_prepare_enable(gr2d->clk);
	if (err) {
		dev_err(dev, "cannot turn on clock\n");
		return err;
	}

	INIT_LIST_HEAD(&gr2d->client.base.list);
	gr2d->client.base.ops = &gr2d_client_ops;
	gr2d->client.base.dev = dev;
	gr2d->client.base.class = HOST1X_CLASS_GR2D;
	gr2d->client.base.syncpts = syncpts;
	gr2d->client.base.num_syncpts = 1;

	INIT_LIST_HEAD(&gr2d->client.list);
	gr2d->client.ops = &gr2d_ops;

	err = host1x_client_register(&gr2d->client.base);
	if (err < 0) {
		dev_err(dev, "failed to register host1x client: %d\n", err);
		return err;
	}

	/* initialize address register map */
	for (i = 0; i < ARRAY_SIZE(gr2d_addr_regs); i++)
		set_bit(gr2d_addr_regs[i], gr2d->addr_regs);

	platform_set_drvdata(pdev, gr2d);

	return 0;
}

static int gr2d_remove(struct platform_device *pdev)
{
	struct gr2d *gr2d = platform_get_drvdata(pdev);
	int err;

	err = host1x_client_unregister(&gr2d->client.base);
	if (err < 0) {
		dev_err(&pdev->dev, "failed to unregister host1x client: %d\n",
			err);
		return err;
	}

	clk_disable_unprepare(gr2d->clk);

	return 0;
}

struct platform_driver tegra_gr2d_driver = {
	.driver = {
		.name = "tegra-gr2d",
		.of_match_table = gr2d_match,
	},
	.probe = gr2d_probe,
	.remove = gr2d_remove,
};
OpenPOWER on IntegriCloud