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9#include <linux/clk.h>
10#include <linux/host1x.h>
11#include <linux/iommu.h>
12#include <linux/module.h>
13#include <linux/of.h>
14#include <linux/of_device.h>
15#include <linux/of_platform.h>
16#include <linux/platform_device.h>
17#include <linux/pm_runtime.h>
18#include <linux/reset.h>
19
20#include <soc/tegra/pmc.h>
21
22#include "drm.h"
23#include "falcon.h"
24#include "vic.h"
25
26struct vic_config {
27 const char *firmware;
28};
29
30struct vic {
31 struct falcon falcon;
32 bool booted;
33
34 void __iomem *regs;
35 struct tegra_drm_client client;
36 struct host1x_channel *channel;
37 struct iommu_domain *domain;
38 struct device *dev;
39 struct clk *clk;
40
41
42 const struct vic_config *config;
43};
44
45static inline struct vic *to_vic(struct tegra_drm_client *client)
46{
47 return container_of(client, struct vic, client);
48}
49
50static void vic_writel(struct vic *vic, u32 value, unsigned int offset)
51{
52 writel(value, vic->regs + offset);
53}
54
55static int vic_runtime_resume(struct device *dev)
56{
57 struct vic *vic = dev_get_drvdata(dev);
58
59 return clk_prepare_enable(vic->clk);
60}
61
62static int vic_runtime_suspend(struct device *dev)
63{
64 struct vic *vic = dev_get_drvdata(dev);
65
66 clk_disable_unprepare(vic->clk);
67
68 vic->booted = false;
69
70 return 0;
71}
72
73static int vic_boot(struct vic *vic)
74{
75 u32 fce_ucode_size, fce_bin_data_offset;
76 void *hdr;
77 int err = 0;
78
79 if (vic->booted)
80 return 0;
81
82
83 vic_writel(vic, CG_IDLE_CG_DLY_CNT(4) |
84 CG_IDLE_CG_EN |
85 CG_WAKEUP_DLY_CNT(4),
86 NV_PVIC_MISC_PRI_VIC_CG);
87
88 err = falcon_boot(&vic->falcon);
89 if (err < 0)
90 return err;
91
92 hdr = vic->falcon.firmware.vaddr;
93 fce_bin_data_offset = *(u32 *)(hdr + VIC_UCODE_FCE_DATA_OFFSET);
94 hdr = vic->falcon.firmware.vaddr +
95 *(u32 *)(hdr + VIC_UCODE_FCE_HEADER_OFFSET);
96 fce_ucode_size = *(u32 *)(hdr + FCE_UCODE_SIZE_OFFSET);
97
98 falcon_execute_method(&vic->falcon, VIC_SET_APPLICATION_ID, 1);
99 falcon_execute_method(&vic->falcon, VIC_SET_FCE_UCODE_SIZE,
100 fce_ucode_size);
101 falcon_execute_method(&vic->falcon, VIC_SET_FCE_UCODE_OFFSET,
102 (vic->falcon.firmware.paddr + fce_bin_data_offset)
103 >> 8);
104
105 err = falcon_wait_idle(&vic->falcon);
106 if (err < 0) {
107 dev_err(vic->dev,
108 "failed to set application ID and FCE base\n");
109 return err;
110 }
111
112 vic->booted = true;
113
114 return 0;
115}
116
117static void *vic_falcon_alloc(struct falcon *falcon, size_t size,
118 dma_addr_t *iova)
119{
120 struct tegra_drm *tegra = falcon->data;
121
122 return tegra_drm_alloc(tegra, size, iova);
123}
124
125static void vic_falcon_free(struct falcon *falcon, size_t size,
126 dma_addr_t iova, void *va)
127{
128 struct tegra_drm *tegra = falcon->data;
129
130 return tegra_drm_free(tegra, size, va, iova);
131}
132
133static const struct falcon_ops vic_falcon_ops = {
134 .alloc = vic_falcon_alloc,
135 .free = vic_falcon_free
136};
137
138static int vic_init(struct host1x_client *client)
139{
140 struct tegra_drm_client *drm = host1x_to_drm_client(client);
141 struct drm_device *dev = dev_get_drvdata(client->parent);
142 struct tegra_drm *tegra = dev->dev_private;
143 struct vic *vic = to_vic(drm);
144 int err;
145
146 if (tegra->domain) {
147 err = iommu_attach_device(tegra->domain, vic->dev);
148 if (err < 0) {
149 dev_err(vic->dev, "failed to attach to domain: %d\n",
150 err);
151 return err;
152 }
153
154 vic->domain = tegra->domain;
155 }
156
157 if (!vic->falcon.data) {
158 vic->falcon.data = tegra;
159 err = falcon_load_firmware(&vic->falcon);
160 if (err < 0)
161 goto detach_device;
162 }
163
164 vic->channel = host1x_channel_request(client->dev);
165 if (!vic->channel) {
166 err = -ENOMEM;
167 goto detach_device;
168 }
169
170 client->syncpts[0] = host1x_syncpt_request(client->dev, 0);
171 if (!client->syncpts[0]) {
172 err = -ENOMEM;
173 goto free_channel;
174 }
175
176 err = tegra_drm_register_client(tegra, drm);
177 if (err < 0)
178 goto free_syncpt;
179
180 return 0;
181
182free_syncpt:
183 host1x_syncpt_free(client->syncpts[0]);
184free_channel:
185 host1x_channel_free(vic->channel);
186detach_device:
187 if (tegra->domain)
188 iommu_detach_device(tegra->domain, vic->dev);
189
190 return err;
191}
192
193static int vic_exit(struct host1x_client *client)
194{
195 struct tegra_drm_client *drm = host1x_to_drm_client(client);
196 struct drm_device *dev = dev_get_drvdata(client->parent);
197 struct tegra_drm *tegra = dev->dev_private;
198 struct vic *vic = to_vic(drm);
199 int err;
200
201 err = tegra_drm_unregister_client(tegra, drm);
202 if (err < 0)
203 return err;
204
205 host1x_syncpt_free(client->syncpts[0]);
206 host1x_channel_free(vic->channel);
207
208 if (vic->domain) {
209 iommu_detach_device(vic->domain, vic->dev);
210 vic->domain = NULL;
211 }
212
213 return 0;
214}
215
216static const struct host1x_client_ops vic_client_ops = {
217 .init = vic_init,
218 .exit = vic_exit,
219};
220
221static int vic_open_channel(struct tegra_drm_client *client,
222 struct tegra_drm_context *context)
223{
224 struct vic *vic = to_vic(client);
225 int err;
226
227 err = pm_runtime_get_sync(vic->dev);
228 if (err < 0)
229 return err;
230
231 err = vic_boot(vic);
232 if (err < 0) {
233 pm_runtime_put(vic->dev);
234 return err;
235 }
236
237 context->channel = host1x_channel_get(vic->channel);
238 if (!context->channel) {
239 pm_runtime_put(vic->dev);
240 return -ENOMEM;
241 }
242
243 return 0;
244}
245
246static void vic_close_channel(struct tegra_drm_context *context)
247{
248 struct vic *vic = to_vic(context->client);
249
250 host1x_channel_put(context->channel);
251
252 pm_runtime_put(vic->dev);
253}
254
255static const struct tegra_drm_client_ops vic_ops = {
256 .open_channel = vic_open_channel,
257 .close_channel = vic_close_channel,
258 .submit = tegra_drm_submit,
259};
260
261static const struct vic_config vic_t124_config = {
262 .firmware = "nvidia/tegra124/vic03_ucode.bin",
263};
264
265static const struct vic_config vic_t210_config = {
266 .firmware = "nvidia/tegra210/vic04_ucode.bin",
267};
268
269static const struct of_device_id vic_match[] = {
270 { .compatible = "nvidia,tegra124-vic", .data = &vic_t124_config },
271 { .compatible = "nvidia,tegra210-vic", .data = &vic_t210_config },
272 { },
273};
274
275static int vic_probe(struct platform_device *pdev)
276{
277 struct vic_config *vic_config = NULL;
278 struct device *dev = &pdev->dev;
279 struct host1x_syncpt **syncpts;
280 struct resource *regs;
281 const struct of_device_id *match;
282 struct vic *vic;
283 int err;
284
285 match = of_match_device(vic_match, dev);
286 vic_config = (struct vic_config *)match->data;
287
288 vic = devm_kzalloc(dev, sizeof(*vic), GFP_KERNEL);
289 if (!vic)
290 return -ENOMEM;
291
292 syncpts = devm_kzalloc(dev, sizeof(*syncpts), GFP_KERNEL);
293 if (!syncpts)
294 return -ENOMEM;
295
296 regs = platform_get_resource(pdev, IORESOURCE_MEM, 0);
297 if (!regs) {
298 dev_err(&pdev->dev, "failed to get registers\n");
299 return -ENXIO;
300 }
301
302 vic->regs = devm_ioremap_resource(dev, regs);
303 if (IS_ERR(vic->regs))
304 return PTR_ERR(vic->regs);
305
306 vic->clk = devm_clk_get(dev, NULL);
307 if (IS_ERR(vic->clk)) {
308 dev_err(&pdev->dev, "failed to get clock\n");
309 return PTR_ERR(vic->clk);
310 }
311
312 vic->falcon.dev = dev;
313 vic->falcon.regs = vic->regs;
314 vic->falcon.ops = &vic_falcon_ops;
315
316 err = falcon_init(&vic->falcon);
317 if (err < 0)
318 return err;
319
320 err = falcon_read_firmware(&vic->falcon, vic_config->firmware);
321 if (err < 0)
322 goto exit_falcon;
323
324 platform_set_drvdata(pdev, vic);
325
326 INIT_LIST_HEAD(&vic->client.base.list);
327 vic->client.base.ops = &vic_client_ops;
328 vic->client.base.dev = dev;
329 vic->client.base.class = HOST1X_CLASS_VIC;
330 vic->client.base.syncpts = syncpts;
331 vic->client.base.num_syncpts = 1;
332 vic->dev = dev;
333 vic->config = vic_config;
334
335 INIT_LIST_HEAD(&vic->client.list);
336 vic->client.ops = &vic_ops;
337
338 err = host1x_client_register(&vic->client.base);
339 if (err < 0) {
340 dev_err(dev, "failed to register host1x client: %d\n", err);
341 platform_set_drvdata(pdev, NULL);
342 goto exit_falcon;
343 }
344
345 pm_runtime_enable(&pdev->dev);
346 if (!pm_runtime_enabled(&pdev->dev)) {
347 err = vic_runtime_resume(&pdev->dev);
348 if (err < 0)
349 goto unregister_client;
350 }
351
352 return 0;
353
354unregister_client:
355 host1x_client_unregister(&vic->client.base);
356exit_falcon:
357 falcon_exit(&vic->falcon);
358
359 return err;
360}
361
362static int vic_remove(struct platform_device *pdev)
363{
364 struct vic *vic = platform_get_drvdata(pdev);
365 int err;
366
367 err = host1x_client_unregister(&vic->client.base);
368 if (err < 0) {
369 dev_err(&pdev->dev, "failed to unregister host1x client: %d\n",
370 err);
371 return err;
372 }
373
374 if (pm_runtime_enabled(&pdev->dev))
375 pm_runtime_disable(&pdev->dev);
376 else
377 vic_runtime_suspend(&pdev->dev);
378
379 falcon_exit(&vic->falcon);
380
381 return 0;
382}
383
384static const struct dev_pm_ops vic_pm_ops = {
385 SET_RUNTIME_PM_OPS(vic_runtime_suspend, vic_runtime_resume, NULL)
386};
387
388struct platform_driver tegra_vic_driver = {
389 .driver = {
390 .name = "tegra-vic",
391 .of_match_table = vic_match,
392 .pm = &vic_pm_ops
393 },
394 .probe = vic_probe,
395 .remove = vic_remove,
396};
397
