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1// SPDX-License-Identifier: GPL-2.0-only
2/*
3 * Copyright (c) 2015, NVIDIA Corporation.
4 */
5
6#include <linux/clk.h>
7#include <linux/delay.h>
8#include <linux/host1x.h>
9#include <linux/iommu.h>
10#include <linux/module.h>
11#include <linux/of.h>
12#include <linux/of_device.h>
13#include <linux/of_platform.h>
14#include <linux/platform_device.h>
15#include <linux/pm_runtime.h>
16#include <linux/reset.h>
17
18#include <soc/tegra/pmc.h>
19
20#include "drm.h"
21#include "falcon.h"
22#include "vic.h"
23
24struct vic_config {
25 const char *firmware;
26 unsigned int version;
27 bool supports_sid;
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 device *dev;
38 struct clk *clk;
39 struct reset_control *rst;
40
41 /* Platform configuration */
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 int err;
59
60 err = clk_prepare_enable(vic->clk);
61 if (err < 0)
62 return err;
63
64 usleep_range(10, 20);
65
66 err = reset_control_deassert(vic->rst);
67 if (err < 0)
68 goto disable;
69
70 usleep_range(10, 20);
71
72 return 0;
73
74disable:
75 clk_disable_unprepare(vic->clk);
76 return err;
77}
78
79static int vic_runtime_suspend(struct device *dev)
80{
81 struct vic *vic = dev_get_drvdata(dev);
82 int err;
83
84 err = reset_control_assert(vic->rst);
85 if (err < 0)
86 return err;
87
88 usleep_range(2000, 4000);
89
90 clk_disable_unprepare(vic->clk);
91
92 vic->booted = false;
93
94 return 0;
95}
96
97static int vic_boot(struct vic *vic)
98{
99#ifdef CONFIG_IOMMU_API
100 struct iommu_fwspec *spec = dev_iommu_fwspec_get(vic->dev);
101#endif
102 u32 fce_ucode_size, fce_bin_data_offset;
103 void *hdr;
104 int err = 0;
105
106 if (vic->booted)
107 return 0;
108
109#ifdef CONFIG_IOMMU_API
110 if (vic->config->supports_sid && spec) {
111 u32 value;
112
113 value = TRANSCFG_ATT(1, TRANSCFG_SID_FALCON) |
114 TRANSCFG_ATT(0, TRANSCFG_SID_HW);
115 vic_writel(vic, value, VIC_TFBIF_TRANSCFG);
116
117 if (spec->num_ids > 0) {
118 value = spec->ids[0] & 0xffff;
119
120 vic_writel(vic, value, VIC_THI_STREAMID0);
121 vic_writel(vic, value, VIC_THI_STREAMID1);
122 }
123 }
124#endif
125
126 /* setup clockgating registers */
127 vic_writel(vic, CG_IDLE_CG_DLY_CNT(4) |
128 CG_IDLE_CG_EN |
129 CG_WAKEUP_DLY_CNT(4),
130 NV_PVIC_MISC_PRI_VIC_CG);
131
132 err = falcon_boot(&vic->falcon);
133 if (err < 0)
134 return err;
135
136 hdr = vic->falcon.firmware.virt;
137 fce_bin_data_offset = *(u32 *)(hdr + VIC_UCODE_FCE_DATA_OFFSET);
138 hdr = vic->falcon.firmware.virt +
139 *(u32 *)(hdr + VIC_UCODE_FCE_HEADER_OFFSET);
140 fce_ucode_size = *(u32 *)(hdr + FCE_UCODE_SIZE_OFFSET);
141
142 falcon_execute_method(&vic->falcon, VIC_SET_APPLICATION_ID, 1);
143 falcon_execute_method(&vic->falcon, VIC_SET_FCE_UCODE_SIZE,
144 fce_ucode_size);
145 falcon_execute_method(&vic->falcon, VIC_SET_FCE_UCODE_OFFSET,
146 (vic->falcon.firmware.iova + fce_bin_data_offset)
147 >> 8);
148
149 err = falcon_wait_idle(&vic->falcon);
150 if (err < 0) {
151 dev_err(vic->dev,
152 "failed to set application ID and FCE base\n");
153 return err;
154 }
155
156 vic->booted = true;
157
158 return 0;
159}
160
161static int vic_init(struct host1x_client *client)
162{
163 struct tegra_drm_client *drm = host1x_to_drm_client(client);
164 struct drm_device *dev = dev_get_drvdata(client->host);
165 struct tegra_drm *tegra = dev->dev_private;
166 struct vic *vic = to_vic(drm);
167 int err;
168
169 err = host1x_client_iommu_attach(client);
170 if (err < 0 && err != -ENODEV) {
171 dev_err(vic->dev, "failed to attach to domain: %d\n", err);
172 return err;
173 }
174
175 vic->channel = host1x_channel_request(client);
176 if (!vic->channel) {
177 err = -ENOMEM;
178 goto detach;
179 }
180
181 client->syncpts[0] = host1x_syncpt_request(client, 0);
182 if (!client->syncpts[0]) {
183 err = -ENOMEM;
184 goto free_channel;
185 }
186
187 err = tegra_drm_register_client(tegra, drm);
188 if (err < 0)
189 goto free_syncpt;
190
191 /*
192 * Inherit the DMA parameters (such as maximum segment size) from the
193 * parent host1x device.
194 */
195 client->dev->dma_parms = client->host->dma_parms;
196
197 return 0;
198
199free_syncpt:
200 host1x_syncpt_free(client->syncpts[0]);
201free_channel:
202 host1x_channel_put(vic->channel);
203detach:
204 host1x_client_iommu_detach(client);
205
206 return err;
207}
208
209static int vic_exit(struct host1x_client *client)
210{
211 struct tegra_drm_client *drm = host1x_to_drm_client(client);
212 struct drm_device *dev = dev_get_drvdata(client->host);
213 struct tegra_drm *tegra = dev->dev_private;
214 struct vic *vic = to_vic(drm);
215 int err;
216
217 /* avoid a dangling pointer just in case this disappears */
218 client->dev->dma_parms = NULL;
219
220 err = tegra_drm_unregister_client(tegra, drm);
221 if (err < 0)
222 return err;
223
224 host1x_syncpt_free(client->syncpts[0]);
225 host1x_channel_put(vic->channel);
226 host1x_client_iommu_detach(client);
227
228 if (client->group) {
229 dma_unmap_single(vic->dev, vic->falcon.firmware.phys,
230 vic->falcon.firmware.size, DMA_TO_DEVICE);
231 tegra_drm_free(tegra, vic->falcon.firmware.size,
232 vic->falcon.firmware.virt,
233 vic->falcon.firmware.iova);
234 } else {
235 dma_free_coherent(vic->dev, vic->falcon.firmware.size,
236 vic->falcon.firmware.virt,
237 vic->falcon.firmware.iova);
238 }
239
240 return 0;
241}
242
243static const struct host1x_client_ops vic_client_ops = {
244 .init = vic_init,
245 .exit = vic_exit,
246};
247
248static int vic_load_firmware(struct vic *vic)
249{
250 struct host1x_client *client = &vic->client.base;
251 struct tegra_drm *tegra = vic->client.drm;
252 dma_addr_t iova;
253 size_t size;
254 void *virt;
255 int err;
256
257 if (vic->falcon.firmware.virt)
258 return 0;
259
260 err = falcon_read_firmware(&vic->falcon, vic->config->firmware);
261 if (err < 0)
262 return err;
263
264 size = vic->falcon.firmware.size;
265
266 if (!client->group) {
267 virt = dma_alloc_coherent(vic->dev, size, &iova, GFP_KERNEL);
268
269 err = dma_mapping_error(vic->dev, iova);
270 if (err < 0)
271 return err;
272 } else {
273 virt = tegra_drm_alloc(tegra, size, &iova);
274 }
275
276 vic->falcon.firmware.virt = virt;
277 vic->falcon.firmware.iova = iova;
278
279 err = falcon_load_firmware(&vic->falcon);
280 if (err < 0)
281 goto cleanup;
282
283 /*
284 * In this case we have received an IOVA from the shared domain, so we
285 * need to make sure to get the physical address so that the DMA API
286 * knows what memory pages to flush the cache for.
287 */
288 if (client->group) {
289 dma_addr_t phys;
290
291 phys = dma_map_single(vic->dev, virt, size, DMA_TO_DEVICE);
292
293 err = dma_mapping_error(vic->dev, phys);
294 if (err < 0)
295 goto cleanup;
296
297 vic->falcon.firmware.phys = phys;
298 }
299
300 return 0;
301
302cleanup:
303 if (!client->group)
304 dma_free_coherent(vic->dev, size, virt, iova);
305 else
306 tegra_drm_free(tegra, size, virt, iova);
307
308 return err;
309}
310
311static int vic_open_channel(struct tegra_drm_client *client,
312 struct tegra_drm_context *context)
313{
314 struct vic *vic = to_vic(client);
315 int err;
316
317 err = pm_runtime_get_sync(vic->dev);
318 if (err < 0)
319 return err;
320
321 err = vic_load_firmware(vic);
322 if (err < 0)
323 goto rpm_put;
324
325 err = vic_boot(vic);
326 if (err < 0)
327 goto rpm_put;
328
329 context->channel = host1x_channel_get(vic->channel);
330 if (!context->channel) {
331 err = -ENOMEM;
332 goto rpm_put;
333 }
334
335 return 0;
336
337rpm_put:
338 pm_runtime_put(vic->dev);
339 return err;
340}
341
342static void vic_close_channel(struct tegra_drm_context *context)
343{
344 struct vic *vic = to_vic(context->client);
345
346 host1x_channel_put(context->channel);
347
348 pm_runtime_put(vic->dev);
349}
350
351static const struct tegra_drm_client_ops vic_ops = {
352 .open_channel = vic_open_channel,
353 .close_channel = vic_close_channel,
354 .submit = tegra_drm_submit,
355};
356
357#define NVIDIA_TEGRA_124_VIC_FIRMWARE "nvidia/tegra124/vic03_ucode.bin"
358
359static const struct vic_config vic_t124_config = {
360 .firmware = NVIDIA_TEGRA_124_VIC_FIRMWARE,
361 .version = 0x40,
362 .supports_sid = false,
363};
364
365#define NVIDIA_TEGRA_210_VIC_FIRMWARE "nvidia/tegra210/vic04_ucode.bin"
366
367static const struct vic_config vic_t210_config = {
368 .firmware = NVIDIA_TEGRA_210_VIC_FIRMWARE,
369 .version = 0x21,
370 .supports_sid = false,
371};
372
373#define NVIDIA_TEGRA_186_VIC_FIRMWARE "nvidia/tegra186/vic04_ucode.bin"
374
375static const struct vic_config vic_t186_config = {
376 .firmware = NVIDIA_TEGRA_186_VIC_FIRMWARE,
377 .version = 0x18,
378 .supports_sid = true,
379};
380
381#define NVIDIA_TEGRA_194_VIC_FIRMWARE "nvidia/tegra194/vic.bin"
382
383static const struct vic_config vic_t194_config = {
384 .firmware = NVIDIA_TEGRA_194_VIC_FIRMWARE,
385 .version = 0x19,
386 .supports_sid = true,
387};
388
389static const struct of_device_id tegra_vic_of_match[] = {
390 { .compatible = "nvidia,tegra124-vic", .data = &vic_t124_config },
391 { .compatible = "nvidia,tegra210-vic", .data = &vic_t210_config },
392 { .compatible = "nvidia,tegra186-vic", .data = &vic_t186_config },
393 { .compatible = "nvidia,tegra194-vic", .data = &vic_t194_config },
394 { },
395};
396MODULE_DEVICE_TABLE(of, tegra_vic_of_match);
397
398static int vic_probe(struct platform_device *pdev)
399{
400 struct device *dev = &pdev->dev;
401 struct host1x_syncpt **syncpts;
402 struct resource *regs;
403 struct vic *vic;
404 int err;
405
406 /* inherit DMA mask from host1x parent */
407 err = dma_coerce_mask_and_coherent(dev, *dev->parent->dma_mask);
408 if (err < 0) {
409 dev_err(&pdev->dev, "failed to set DMA mask: %d\n", err);
410 return err;
411 }
412
413 vic = devm_kzalloc(dev, sizeof(*vic), GFP_KERNEL);
414 if (!vic)
415 return -ENOMEM;
416
417 vic->config = of_device_get_match_data(dev);
418
419 syncpts = devm_kzalloc(dev, sizeof(*syncpts), GFP_KERNEL);
420 if (!syncpts)
421 return -ENOMEM;
422
423 regs = platform_get_resource(pdev, IORESOURCE_MEM, 0);
424 if (!regs) {
425 dev_err(&pdev->dev, "failed to get registers\n");
426 return -ENXIO;
427 }
428
429 vic->regs = devm_ioremap_resource(dev, regs);
430 if (IS_ERR(vic->regs))
431 return PTR_ERR(vic->regs);
432
433 vic->clk = devm_clk_get(dev, NULL);
434 if (IS_ERR(vic->clk)) {
435 dev_err(&pdev->dev, "failed to get clock\n");
436 return PTR_ERR(vic->clk);
437 }
438
439 if (!dev->pm_domain) {
440 vic->rst = devm_reset_control_get(dev, "vic");
441 if (IS_ERR(vic->rst)) {
442 dev_err(&pdev->dev, "failed to get reset\n");
443 return PTR_ERR(vic->rst);
444 }
445 }
446
447 vic->falcon.dev = dev;
448 vic->falcon.regs = vic->regs;
449
450 err = falcon_init(&vic->falcon);
451 if (err < 0)
452 return err;
453
454 platform_set_drvdata(pdev, vic);
455
456 INIT_LIST_HEAD(&vic->client.base.list);
457 vic->client.base.ops = &vic_client_ops;
458 vic->client.base.dev = dev;
459 vic->client.base.class = HOST1X_CLASS_VIC;
460 vic->client.base.syncpts = syncpts;
461 vic->client.base.num_syncpts = 1;
462 vic->dev = dev;
463
464 INIT_LIST_HEAD(&vic->client.list);
465 vic->client.version = vic->config->version;
466 vic->client.ops = &vic_ops;
467
468 err = host1x_client_register(&vic->client.base);
469 if (err < 0) {
470 dev_err(dev, "failed to register host1x client: %d\n", err);
471 goto exit_falcon;
472 }
473
474 pm_runtime_enable(&pdev->dev);
475 if (!pm_runtime_enabled(&pdev->dev)) {
476 err = vic_runtime_resume(&pdev->dev);
477 if (err < 0)
478 goto unregister_client;
479 }
480
481 return 0;
482
483unregister_client:
484 host1x_client_unregister(&vic->client.base);
485exit_falcon:
486 falcon_exit(&vic->falcon);
487
488 return err;
489}
490
491static int vic_remove(struct platform_device *pdev)
492{
493 struct vic *vic = platform_get_drvdata(pdev);
494 int err;
495
496 err = host1x_client_unregister(&vic->client.base);
497 if (err < 0) {
498 dev_err(&pdev->dev, "failed to unregister host1x client: %d\n",
499 err);
500 return err;
501 }
502
503 if (pm_runtime_enabled(&pdev->dev))
504 pm_runtime_disable(&pdev->dev);
505 else
506 vic_runtime_suspend(&pdev->dev);
507
508 falcon_exit(&vic->falcon);
509
510 return 0;
511}
512
513static const struct dev_pm_ops vic_pm_ops = {
514 SET_RUNTIME_PM_OPS(vic_runtime_suspend, vic_runtime_resume, NULL)
515};
516
517struct platform_driver tegra_vic_driver = {
518 .driver = {
519 .name = "tegra-vic",
520 .of_match_table = tegra_vic_of_match,
521 .pm = &vic_pm_ops
522 },
523 .probe = vic_probe,
524 .remove = vic_remove,
525};
526
527#if IS_ENABLED(CONFIG_ARCH_TEGRA_124_SOC)
528MODULE_FIRMWARE(NVIDIA_TEGRA_124_VIC_FIRMWARE);
529#endif
530#if IS_ENABLED(CONFIG_ARCH_TEGRA_210_SOC)
531MODULE_FIRMWARE(NVIDIA_TEGRA_210_VIC_FIRMWARE);
532#endif
533#if IS_ENABLED(CONFIG_ARCH_TEGRA_186_SOC)
534MODULE_FIRMWARE(NVIDIA_TEGRA_186_VIC_FIRMWARE);
535#endif
536#if IS_ENABLED(CONFIG_ARCH_TEGRA_194_SOC)
537MODULE_FIRMWARE(NVIDIA_TEGRA_194_VIC_FIRMWARE);
538#endif