1 /*
2 * drivers/video/tegra/host/gr2d/gr2d.c
3 *
4 * Tegra Graphics 2D
5 *
6 * Copyright (c) 2012-2013, NVIDIA Corporation.
7 *
8 * This program is free software; you can redistribute it and/or modify it
9 * under the terms and conditions of the GNU General Public License,
10 * version 2, as published by the Free Software Foundation.
11 *
12 * This program is distributed in the hope it will be useful, but WITHOUT
13 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
14 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
15 * more details.
16 *
17 * You should have received a copy of the GNU General Public License
18 * along with this program. If not, see <http://www.gnu.org/licenses/>.
19 */
20
21 #include <linux/export.h>
22 #include <linux/of.h>
23 #include <linux/of_device.h>
24 #include <linux/clk.h>
25
26 #include "channel.h"
27 #include "drm.h"
28 #include "gem.h"
29 #include "job.h"
30 #include "host1x.h"
31 #include "host1x_bo.h"
32 #include "host1x_client.h"
33 #include "syncpt.h"
34
35 struct gr2d {
36 struct host1x_client client;
37 struct clk *clk;
38 struct host1x_channel *channel;
39 unsigned long *addr_regs;
40 };
41
to_gr2d(struct host1x_client * client)42 static inline struct gr2d *to_gr2d(struct host1x_client *client)
43 {
44 return container_of(client, struct gr2d, client);
45 }
46
47 static int gr2d_is_addr_reg(struct device *dev, u32 class, u32 reg);
48
gr2d_client_init(struct host1x_client * client,struct drm_device * drm)49 static int gr2d_client_init(struct host1x_client *client,
50 struct drm_device *drm)
51 {
52 return 0;
53 }
54
gr2d_client_exit(struct host1x_client * client)55 static int gr2d_client_exit(struct host1x_client *client)
56 {
57 return 0;
58 }
59
gr2d_open_channel(struct host1x_client * client,struct host1x_drm_context * context)60 static int gr2d_open_channel(struct host1x_client *client,
61 struct host1x_drm_context *context)
62 {
63 struct gr2d *gr2d = to_gr2d(client);
64
65 context->channel = host1x_channel_get(gr2d->channel);
66
67 if (!context->channel)
68 return -ENOMEM;
69
70 return 0;
71 }
72
gr2d_close_channel(struct host1x_drm_context * context)73 static void gr2d_close_channel(struct host1x_drm_context *context)
74 {
75 host1x_channel_put(context->channel);
76 }
77
host1x_bo_lookup(struct drm_device * drm,struct drm_file * file,u32 handle)78 static struct host1x_bo *host1x_bo_lookup(struct drm_device *drm,
79 struct drm_file *file,
80 u32 handle)
81 {
82 struct drm_gem_object *gem;
83 struct tegra_bo *bo;
84
85 gem = drm_gem_object_lookup(drm, file, handle);
86 if (!gem)
87 return 0;
88
89 mutex_lock(&drm->struct_mutex);
90 drm_gem_object_unreference(gem);
91 mutex_unlock(&drm->struct_mutex);
92
93 bo = to_tegra_bo(gem);
94 return &bo->base;
95 }
96
gr2d_submit(struct host1x_drm_context * context,struct drm_tegra_submit * args,struct drm_device * drm,struct drm_file * file)97 static int gr2d_submit(struct host1x_drm_context *context,
98 struct drm_tegra_submit *args, struct drm_device *drm,
99 struct drm_file *file)
100 {
101 struct host1x_job *job;
102 unsigned int num_cmdbufs = args->num_cmdbufs;
103 unsigned int num_relocs = args->num_relocs;
104 unsigned int num_waitchks = args->num_waitchks;
105 struct drm_tegra_cmdbuf __user *cmdbufs =
106 (void * __user)(uintptr_t)args->cmdbufs;
107 struct drm_tegra_reloc __user *relocs =
108 (void * __user)(uintptr_t)args->relocs;
109 struct drm_tegra_waitchk __user *waitchks =
110 (void * __user)(uintptr_t)args->waitchks;
111 struct drm_tegra_syncpt syncpt;
112 int err;
113
114 /* We don't yet support other than one syncpt_incr struct per submit */
115 if (args->num_syncpts != 1)
116 return -EINVAL;
117
118 job = host1x_job_alloc(context->channel, args->num_cmdbufs,
119 args->num_relocs, args->num_waitchks);
120 if (!job)
121 return -ENOMEM;
122
123 job->num_relocs = args->num_relocs;
124 job->num_waitchk = args->num_waitchks;
125 job->client = (u32)args->context;
126 job->class = context->client->class;
127 job->serialize = true;
128
129 while (num_cmdbufs) {
130 struct drm_tegra_cmdbuf cmdbuf;
131 struct host1x_bo *bo;
132
133 err = copy_from_user(&cmdbuf, cmdbufs, sizeof(cmdbuf));
134 if (err)
135 goto fail;
136
137 bo = host1x_bo_lookup(drm, file, cmdbuf.handle);
138 if (!bo)
139 goto fail;
140
141 host1x_job_add_gather(job, bo, cmdbuf.words, cmdbuf.offset);
142 num_cmdbufs--;
143 cmdbufs++;
144 }
145
146 err = copy_from_user(job->relocarray, relocs,
147 sizeof(*relocs) * num_relocs);
148 if (err)
149 goto fail;
150
151 while (num_relocs--) {
152 struct host1x_reloc *reloc = &job->relocarray[num_relocs];
153 struct host1x_bo *cmdbuf, *target;
154
155 cmdbuf = host1x_bo_lookup(drm, file, (u32)reloc->cmdbuf);
156 target = host1x_bo_lookup(drm, file, (u32)reloc->target);
157
158 reloc->cmdbuf = cmdbuf;
159 reloc->target = target;
160
161 if (!reloc->target || !reloc->cmdbuf)
162 goto fail;
163 }
164
165 err = copy_from_user(job->waitchk, waitchks,
166 sizeof(*waitchks) * num_waitchks);
167 if (err)
168 goto fail;
169
170 err = copy_from_user(&syncpt, (void * __user)(uintptr_t)args->syncpts,
171 sizeof(syncpt));
172 if (err)
173 goto fail;
174
175 job->syncpt_id = syncpt.id;
176 job->syncpt_incrs = syncpt.incrs;
177 job->timeout = 10000;
178 job->is_addr_reg = gr2d_is_addr_reg;
179
180 if (args->timeout && args->timeout < 10000)
181 job->timeout = args->timeout;
182
183 err = host1x_job_pin(job, context->client->dev);
184 if (err)
185 goto fail;
186
187 err = host1x_job_submit(job);
188 if (err)
189 goto fail_submit;
190
191 args->fence = job->syncpt_end;
192
193 host1x_job_put(job);
194 return 0;
195
196 fail_submit:
197 host1x_job_unpin(job);
198 fail:
199 host1x_job_put(job);
200 return err;
201 }
202
203 static struct host1x_client_ops gr2d_client_ops = {
204 .drm_init = gr2d_client_init,
205 .drm_exit = gr2d_client_exit,
206 .open_channel = gr2d_open_channel,
207 .close_channel = gr2d_close_channel,
208 .submit = gr2d_submit,
209 };
210
gr2d_init_addr_reg_map(struct device * dev,struct gr2d * gr2d)211 static void gr2d_init_addr_reg_map(struct device *dev, struct gr2d *gr2d)
212 {
213 const u32 gr2d_addr_regs[] = {0x1a, 0x1b, 0x26, 0x2b, 0x2c, 0x2d, 0x31,
214 0x32, 0x48, 0x49, 0x4a, 0x4b, 0x4c};
215 unsigned long *bitmap;
216 int i;
217
218 bitmap = devm_kzalloc(dev, DIV_ROUND_UP(256, BITS_PER_BYTE),
219 GFP_KERNEL);
220
221 for (i = 0; i < ARRAY_SIZE(gr2d_addr_regs); ++i) {
222 u32 reg = gr2d_addr_regs[i];
223 bitmap[BIT_WORD(reg)] |= BIT_MASK(reg);
224 }
225
226 gr2d->addr_regs = bitmap;
227 }
228
gr2d_is_addr_reg(struct device * dev,u32 class,u32 reg)229 static int gr2d_is_addr_reg(struct device *dev, u32 class, u32 reg)
230 {
231 struct gr2d *gr2d = dev_get_drvdata(dev);
232
233 switch (class) {
234 case HOST1X_CLASS_HOST1X:
235 return reg == 0x2b;
236 case HOST1X_CLASS_GR2D:
237 case HOST1X_CLASS_GR2D_SB:
238 reg &= 0xff;
239 if (gr2d->addr_regs[BIT_WORD(reg)] & BIT_MASK(reg))
240 return 1;
241 default:
242 return 0;
243 }
244 }
245
246 static const struct of_device_id gr2d_match[] = {
247 { .compatible = "nvidia,tegra30-gr2d" },
248 { .compatible = "nvidia,tegra20-gr2d" },
249 { },
250 };
251
gr2d_probe(struct platform_device * pdev)252 static int gr2d_probe(struct platform_device *pdev)
253 {
254 struct device *dev = &pdev->dev;
255 struct host1x_drm *host1x = host1x_get_drm_data(dev->parent);
256 int err;
257 struct gr2d *gr2d = NULL;
258 struct host1x_syncpt **syncpts;
259
260 gr2d = devm_kzalloc(dev, sizeof(*gr2d), GFP_KERNEL);
261 if (!gr2d)
262 return -ENOMEM;
263
264 syncpts = devm_kzalloc(dev, sizeof(*syncpts), GFP_KERNEL);
265 if (!syncpts)
266 return -ENOMEM;
267
268 gr2d->clk = devm_clk_get(dev, NULL);
269 if (IS_ERR(gr2d->clk)) {
270 dev_err(dev, "cannot get clock\n");
271 return PTR_ERR(gr2d->clk);
272 }
273
274 err = clk_prepare_enable(gr2d->clk);
275 if (err) {
276 dev_err(dev, "cannot turn on clock\n");
277 return err;
278 }
279
280 gr2d->channel = host1x_channel_request(dev);
281 if (!gr2d->channel)
282 return -ENOMEM;
283
284 *syncpts = host1x_syncpt_request(dev, 0);
285 if (!(*syncpts)) {
286 host1x_channel_free(gr2d->channel);
287 return -ENOMEM;
288 }
289
290 gr2d->client.ops = &gr2d_client_ops;
291 gr2d->client.dev = dev;
292 gr2d->client.class = HOST1X_CLASS_GR2D;
293 gr2d->client.syncpts = syncpts;
294 gr2d->client.num_syncpts = 1;
295
296 err = host1x_register_client(host1x, &gr2d->client);
297 if (err < 0) {
298 dev_err(dev, "failed to register host1x client: %d\n", err);
299 return err;
300 }
301
302 gr2d_init_addr_reg_map(dev, gr2d);
303
304 platform_set_drvdata(pdev, gr2d);
305
306 return 0;
307 }
308
gr2d_remove(struct platform_device * pdev)309 static int __exit gr2d_remove(struct platform_device *pdev)
310 {
311 struct host1x_drm *host1x = host1x_get_drm_data(pdev->dev.parent);
312 struct gr2d *gr2d = platform_get_drvdata(pdev);
313 unsigned int i;
314 int err;
315
316 err = host1x_unregister_client(host1x, &gr2d->client);
317 if (err < 0) {
318 dev_err(&pdev->dev, "failed to unregister client: %d\n", err);
319 return err;
320 }
321
322 for (i = 0; i < gr2d->client.num_syncpts; i++)
323 host1x_syncpt_free(gr2d->client.syncpts[i]);
324
325 host1x_channel_free(gr2d->channel);
326 clk_disable_unprepare(gr2d->clk);
327
328 return 0;
329 }
330
331 struct platform_driver tegra_gr2d_driver = {
332 .probe = gr2d_probe,
333 .remove = __exit_p(gr2d_remove),
334 .driver = {
335 .owner = THIS_MODULE,
336 .name = "gr2d",
337 .of_match_table = gr2d_match,
338 }
339 };
340