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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 /*
121 * STREAMID0 is used for input/output buffers.
122 * Initialize it to SID_VIC in case context isolation
123 * is not enabled, and SID_VIC is used for both firmware
124 * and data buffers.
125 *
126 * If context isolation is enabled, it will be
127 * overridden by the SETSTREAMID opcode as part of
128 * each job.
129 */
130 vic_writel(vic, value, VIC_THI_STREAMID0);
131
132 /* STREAMID1 is used for firmware loading. */
133 vic_writel(vic, value, VIC_THI_STREAMID1);
134 }
135 }
136#endif
137
138 /* setup clockgating registers */
139 vic_writel(vic, CG_IDLE_CG_DLY_CNT(4) |
140 CG_IDLE_CG_EN |
141 CG_WAKEUP_DLY_CNT(4),
142 NV_PVIC_MISC_PRI_VIC_CG);
143
144 err = falcon_boot(&vic->falcon);
145 if (err < 0)
146 return err;
147
148 hdr = vic->falcon.firmware.virt;
149 fce_bin_data_offset = *(u32 *)(hdr + VIC_UCODE_FCE_DATA_OFFSET);
150
151 /* Old VIC firmware needs kernel help with setting up FCE microcode. */
152 if (fce_bin_data_offset != 0x0 && fce_bin_data_offset != 0xa5a5a5a5) {
153 hdr = vic->falcon.firmware.virt +
154 *(u32 *)(hdr + VIC_UCODE_FCE_HEADER_OFFSET);
155 fce_ucode_size = *(u32 *)(hdr + FCE_UCODE_SIZE_OFFSET);
156
157 falcon_execute_method(&vic->falcon, VIC_SET_FCE_UCODE_SIZE,
158 fce_ucode_size);
159 falcon_execute_method(
160 &vic->falcon, VIC_SET_FCE_UCODE_OFFSET,
161 (vic->falcon.firmware.iova + fce_bin_data_offset) >> 8);
162 }
163
164 err = falcon_wait_idle(&vic->falcon);
165 if (err < 0) {
166 dev_err(vic->dev,
167 "failed to set application ID and FCE base\n");
168 return err;
169 }
170
171 vic->booted = true;
172
173 return 0;
174}
175
176static int vic_init(struct host1x_client *client)
177{
178 struct tegra_drm_client *drm = host1x_to_drm_client(client);
179 struct drm_device *dev = dev_get_drvdata(client->host);
180 struct tegra_drm *tegra = dev->dev_private;
181 struct vic *vic = to_vic(drm);
182 int err;
183
184 err = host1x_client_iommu_attach(client);
185 if (err < 0 && err != -ENODEV) {
186 dev_err(vic->dev, "failed to attach to domain: %d\n", err);
187 return err;
188 }
189
190 vic->channel = host1x_channel_request(client);
191 if (!vic->channel) {
192 err = -ENOMEM;
193 goto detach;
194 }
195
196 client->syncpts[0] = host1x_syncpt_request(client, 0);
197 if (!client->syncpts[0]) {
198 err = -ENOMEM;
199 goto free_channel;
200 }
201
202 err = tegra_drm_register_client(tegra, drm);
203 if (err < 0)
204 goto free_syncpt;
205
206 /*
207 * Inherit the DMA parameters (such as maximum segment size) from the
208 * parent host1x device.
209 */
210 client->dev->dma_parms = client->host->dma_parms;
211
212 return 0;
213
214free_syncpt:
215 host1x_syncpt_put(client->syncpts[0]);
216free_channel:
217 host1x_channel_put(vic->channel);
218detach:
219 host1x_client_iommu_detach(client);
220
221 return err;
222}
223
224static int vic_exit(struct host1x_client *client)
225{
226 struct tegra_drm_client *drm = host1x_to_drm_client(client);
227 struct drm_device *dev = dev_get_drvdata(client->host);
228 struct tegra_drm *tegra = dev->dev_private;
229 struct vic *vic = to_vic(drm);
230 int err;
231
232 /* avoid a dangling pointer just in case this disappears */
233 client->dev->dma_parms = NULL;
234
235 err = tegra_drm_unregister_client(tegra, drm);
236 if (err < 0)
237 return err;
238
239 host1x_syncpt_put(client->syncpts[0]);
240 host1x_channel_put(vic->channel);
241 host1x_client_iommu_detach(client);
242
243 if (client->group) {
244 dma_unmap_single(vic->dev, vic->falcon.firmware.phys,
245 vic->falcon.firmware.size, DMA_TO_DEVICE);
246 tegra_drm_free(tegra, vic->falcon.firmware.size,
247 vic->falcon.firmware.virt,
248 vic->falcon.firmware.iova);
249 } else {
250 dma_free_coherent(vic->dev, vic->falcon.firmware.size,
251 vic->falcon.firmware.virt,
252 vic->falcon.firmware.iova);
253 }
254
255 return 0;
256}
257
258static const struct host1x_client_ops vic_client_ops = {
259 .init = vic_init,
260 .exit = vic_exit,
261};
262
263static int vic_load_firmware(struct vic *vic)
264{
265 struct host1x_client *client = &vic->client.base;
266 struct tegra_drm *tegra = vic->client.drm;
267 dma_addr_t iova;
268 size_t size;
269 void *virt;
270 int err;
271
272 if (vic->falcon.firmware.virt)
273 return 0;
274
275 err = falcon_read_firmware(&vic->falcon, vic->config->firmware);
276 if (err < 0)
277 return err;
278
279 size = vic->falcon.firmware.size;
280
281 if (!client->group) {
282 virt = dma_alloc_coherent(vic->dev, size, &iova, GFP_KERNEL);
283
284 err = dma_mapping_error(vic->dev, iova);
285 if (err < 0)
286 return err;
287 } else {
288 virt = tegra_drm_alloc(tegra, size, &iova);
289 }
290
291 vic->falcon.firmware.virt = virt;
292 vic->falcon.firmware.iova = iova;
293
294 err = falcon_load_firmware(&vic->falcon);
295 if (err < 0)
296 goto cleanup;
297
298 /*
299 * In this case we have received an IOVA from the shared domain, so we
300 * need to make sure to get the physical address so that the DMA API
301 * knows what memory pages to flush the cache for.
302 */
303 if (client->group) {
304 dma_addr_t phys;
305
306 phys = dma_map_single(vic->dev, virt, size, DMA_TO_DEVICE);
307
308 err = dma_mapping_error(vic->dev, phys);
309 if (err < 0)
310 goto cleanup;
311
312 vic->falcon.firmware.phys = phys;
313 }
314
315 return 0;
316
317cleanup:
318 if (!client->group)
319 dma_free_coherent(vic->dev, size, virt, iova);
320 else
321 tegra_drm_free(tegra, size, virt, iova);
322
323 return err;
324}
325
326static int vic_open_channel(struct tegra_drm_client *client,
327 struct tegra_drm_context *context)
328{
329 struct vic *vic = to_vic(client);
330 int err;
331
332 err = pm_runtime_resume_and_get(vic->dev);
333 if (err < 0)
334 return err;
335
336 err = vic_load_firmware(vic);
337 if (err < 0)
338 goto rpm_put;
339
340 err = vic_boot(vic);
341 if (err < 0)
342 goto rpm_put;
343
344 context->channel = host1x_channel_get(vic->channel);
345 if (!context->channel) {
346 err = -ENOMEM;
347 goto rpm_put;
348 }
349
350 return 0;
351
352rpm_put:
353 pm_runtime_put(vic->dev);
354 return err;
355}
356
357static void vic_close_channel(struct tegra_drm_context *context)
358{
359 struct vic *vic = to_vic(context->client);
360
361 host1x_channel_put(context->channel);
362
363 pm_runtime_put(vic->dev);
364}
365
366static const struct tegra_drm_client_ops vic_ops = {
367 .open_channel = vic_open_channel,
368 .close_channel = vic_close_channel,
369 .submit = tegra_drm_submit,
370};
371
372#define NVIDIA_TEGRA_124_VIC_FIRMWARE "nvidia/tegra124/vic03_ucode.bin"
373
374static const struct vic_config vic_t124_config = {
375 .firmware = NVIDIA_TEGRA_124_VIC_FIRMWARE,
376 .version = 0x40,
377 .supports_sid = false,
378};
379
380#define NVIDIA_TEGRA_210_VIC_FIRMWARE "nvidia/tegra210/vic04_ucode.bin"
381
382static const struct vic_config vic_t210_config = {
383 .firmware = NVIDIA_TEGRA_210_VIC_FIRMWARE,
384 .version = 0x21,
385 .supports_sid = false,
386};
387
388#define NVIDIA_TEGRA_186_VIC_FIRMWARE "nvidia/tegra186/vic04_ucode.bin"
389
390static const struct vic_config vic_t186_config = {
391 .firmware = NVIDIA_TEGRA_186_VIC_FIRMWARE,
392 .version = 0x18,
393 .supports_sid = true,
394};
395
396#define NVIDIA_TEGRA_194_VIC_FIRMWARE "nvidia/tegra194/vic.bin"
397
398static const struct vic_config vic_t194_config = {
399 .firmware = NVIDIA_TEGRA_194_VIC_FIRMWARE,
400 .version = 0x19,
401 .supports_sid = true,
402};
403
404static const struct of_device_id tegra_vic_of_match[] = {
405 { .compatible = "nvidia,tegra124-vic", .data = &vic_t124_config },
406 { .compatible = "nvidia,tegra210-vic", .data = &vic_t210_config },
407 { .compatible = "nvidia,tegra186-vic", .data = &vic_t186_config },
408 { .compatible = "nvidia,tegra194-vic", .data = &vic_t194_config },
409 { },
410};
411MODULE_DEVICE_TABLE(of, tegra_vic_of_match);
412
413static int vic_probe(struct platform_device *pdev)
414{
415 struct device *dev = &pdev->dev;
416 struct host1x_syncpt **syncpts;
417 struct resource *regs;
418 struct vic *vic;
419 int err;
420
421 /* inherit DMA mask from host1x parent */
422 err = dma_coerce_mask_and_coherent(dev, *dev->parent->dma_mask);
423 if (err < 0) {
424 dev_err(&pdev->dev, "failed to set DMA mask: %d\n", err);
425 return err;
426 }
427
428 vic = devm_kzalloc(dev, sizeof(*vic), GFP_KERNEL);
429 if (!vic)
430 return -ENOMEM;
431
432 vic->config = of_device_get_match_data(dev);
433
434 syncpts = devm_kzalloc(dev, sizeof(*syncpts), GFP_KERNEL);
435 if (!syncpts)
436 return -ENOMEM;
437
438 regs = platform_get_resource(pdev, IORESOURCE_MEM, 0);
439 if (!regs) {
440 dev_err(&pdev->dev, "failed to get registers\n");
441 return -ENXIO;
442 }
443
444 vic->regs = devm_ioremap_resource(dev, regs);
445 if (IS_ERR(vic->regs))
446 return PTR_ERR(vic->regs);
447
448 vic->clk = devm_clk_get(dev, NULL);
449 if (IS_ERR(vic->clk)) {
450 dev_err(&pdev->dev, "failed to get clock\n");
451 return PTR_ERR(vic->clk);
452 }
453
454 if (!dev->pm_domain) {
455 vic->rst = devm_reset_control_get(dev, "vic");
456 if (IS_ERR(vic->rst)) {
457 dev_err(&pdev->dev, "failed to get reset\n");
458 return PTR_ERR(vic->rst);
459 }
460 }
461
462 vic->falcon.dev = dev;
463 vic->falcon.regs = vic->regs;
464
465 err = falcon_init(&vic->falcon);
466 if (err < 0)
467 return err;
468
469 platform_set_drvdata(pdev, vic);
470
471 INIT_LIST_HEAD(&vic->client.base.list);
472 vic->client.base.ops = &vic_client_ops;
473 vic->client.base.dev = dev;
474 vic->client.base.class = HOST1X_CLASS_VIC;
475 vic->client.base.syncpts = syncpts;
476 vic->client.base.num_syncpts = 1;
477 vic->dev = dev;
478
479 INIT_LIST_HEAD(&vic->client.list);
480 vic->client.version = vic->config->version;
481 vic->client.ops = &vic_ops;
482
483 err = host1x_client_register(&vic->client.base);
484 if (err < 0) {
485 dev_err(dev, "failed to register host1x client: %d\n", err);
486 goto exit_falcon;
487 }
488
489 pm_runtime_enable(&pdev->dev);
490 if (!pm_runtime_enabled(&pdev->dev)) {
491 err = vic_runtime_resume(&pdev->dev);
492 if (err < 0)
493 goto unregister_client;
494 }
495
496 return 0;
497
498unregister_client:
499 host1x_client_unregister(&vic->client.base);
500exit_falcon:
501 falcon_exit(&vic->falcon);
502
503 return err;
504}
505
506static int vic_remove(struct platform_device *pdev)
507{
508 struct vic *vic = platform_get_drvdata(pdev);
509 int err;
510
511 err = host1x_client_unregister(&vic->client.base);
512 if (err < 0) {
513 dev_err(&pdev->dev, "failed to unregister host1x client: %d\n",
514 err);
515 return err;
516 }
517
518 if (pm_runtime_enabled(&pdev->dev))
519 pm_runtime_disable(&pdev->dev);
520 else
521 vic_runtime_suspend(&pdev->dev);
522
523 falcon_exit(&vic->falcon);
524
525 return 0;
526}
527
528static const struct dev_pm_ops vic_pm_ops = {
529 SET_RUNTIME_PM_OPS(vic_runtime_suspend, vic_runtime_resume, NULL)
530};
531
532struct platform_driver tegra_vic_driver = {
533 .driver = {
534 .name = "tegra-vic",
535 .of_match_table = tegra_vic_of_match,
536 .pm = &vic_pm_ops
537 },
538 .probe = vic_probe,
539 .remove = vic_remove,
540};
541
542#if IS_ENABLED(CONFIG_ARCH_TEGRA_124_SOC)
543MODULE_FIRMWARE(NVIDIA_TEGRA_124_VIC_FIRMWARE);
544#endif
545#if IS_ENABLED(CONFIG_ARCH_TEGRA_210_SOC)
546MODULE_FIRMWARE(NVIDIA_TEGRA_210_VIC_FIRMWARE);
547#endif
548#if IS_ENABLED(CONFIG_ARCH_TEGRA_186_SOC)
549MODULE_FIRMWARE(NVIDIA_TEGRA_186_VIC_FIRMWARE);
550#endif
551#if IS_ENABLED(CONFIG_ARCH_TEGRA_194_SOC)
552MODULE_FIRMWARE(NVIDIA_TEGRA_194_VIC_FIRMWARE);
553#endif