1 // SPDX-License-Identifier: GPL-2.0-only
2 /*
3 * Tegra host1x driver
4 *
5 * Copyright (c) 2010-2013, NVIDIA Corporation.
6 */
7
8 #include <linux/clk.h>
9 #include <linux/delay.h>
10 #include <linux/dma-mapping.h>
11 #include <linux/io.h>
12 #include <linux/list.h>
13 #include <linux/module.h>
14 #include <linux/of.h>
15 #include <linux/of_platform.h>
16 #include <linux/platform_device.h>
17 #include <linux/pm_runtime.h>
18 #include <linux/slab.h>
19
20 #include <soc/tegra/common.h>
21
22 #define CREATE_TRACE_POINTS
23 #include <trace/events/host1x.h>
24 #undef CREATE_TRACE_POINTS
25
26 #if IS_ENABLED(CONFIG_ARM_DMA_USE_IOMMU)
27 #include <asm/dma-iommu.h>
28 #endif
29
30 #include "bus.h"
31 #include "channel.h"
32 #include "context.h"
33 #include "debug.h"
34 #include "dev.h"
35 #include "intr.h"
36
37 #include "hw/host1x01.h"
38 #include "hw/host1x02.h"
39 #include "hw/host1x04.h"
40 #include "hw/host1x05.h"
41 #include "hw/host1x06.h"
42 #include "hw/host1x07.h"
43 #include "hw/host1x08.h"
44
host1x_common_writel(struct host1x * host1x,u32 v,u32 r)45 void host1x_common_writel(struct host1x *host1x, u32 v, u32 r)
46 {
47 writel(v, host1x->common_regs + r);
48 }
49
host1x_hypervisor_writel(struct host1x * host1x,u32 v,u32 r)50 void host1x_hypervisor_writel(struct host1x *host1x, u32 v, u32 r)
51 {
52 writel(v, host1x->hv_regs + r);
53 }
54
host1x_hypervisor_readl(struct host1x * host1x,u32 r)55 u32 host1x_hypervisor_readl(struct host1x *host1x, u32 r)
56 {
57 return readl(host1x->hv_regs + r);
58 }
59
host1x_sync_writel(struct host1x * host1x,u32 v,u32 r)60 void host1x_sync_writel(struct host1x *host1x, u32 v, u32 r)
61 {
62 void __iomem *sync_regs = host1x->regs + host1x->info->sync_offset;
63
64 writel(v, sync_regs + r);
65 }
66
host1x_sync_readl(struct host1x * host1x,u32 r)67 u32 host1x_sync_readl(struct host1x *host1x, u32 r)
68 {
69 void __iomem *sync_regs = host1x->regs + host1x->info->sync_offset;
70
71 return readl(sync_regs + r);
72 }
73
host1x_ch_writel(struct host1x_channel * ch,u32 v,u32 r)74 void host1x_ch_writel(struct host1x_channel *ch, u32 v, u32 r)
75 {
76 writel(v, ch->regs + r);
77 }
78
host1x_ch_readl(struct host1x_channel * ch,u32 r)79 u32 host1x_ch_readl(struct host1x_channel *ch, u32 r)
80 {
81 return readl(ch->regs + r);
82 }
83
84 static const struct host1x_info host1x01_info = {
85 .nb_channels = 8,
86 .nb_pts = 32,
87 .nb_mlocks = 16,
88 .nb_bases = 8,
89 .init = host1x01_init,
90 .sync_offset = 0x3000,
91 .dma_mask = DMA_BIT_MASK(32),
92 .has_wide_gather = false,
93 .has_hypervisor = false,
94 .num_sid_entries = 0,
95 .sid_table = NULL,
96 .reserve_vblank_syncpts = true,
97 };
98
99 static const struct host1x_info host1x02_info = {
100 .nb_channels = 9,
101 .nb_pts = 32,
102 .nb_mlocks = 16,
103 .nb_bases = 12,
104 .init = host1x02_init,
105 .sync_offset = 0x3000,
106 .dma_mask = DMA_BIT_MASK(32),
107 .has_wide_gather = false,
108 .has_hypervisor = false,
109 .num_sid_entries = 0,
110 .sid_table = NULL,
111 .reserve_vblank_syncpts = true,
112 };
113
114 static const struct host1x_info host1x04_info = {
115 .nb_channels = 12,
116 .nb_pts = 192,
117 .nb_mlocks = 16,
118 .nb_bases = 64,
119 .init = host1x04_init,
120 .sync_offset = 0x2100,
121 .dma_mask = DMA_BIT_MASK(34),
122 .has_wide_gather = false,
123 .has_hypervisor = false,
124 .num_sid_entries = 0,
125 .sid_table = NULL,
126 .reserve_vblank_syncpts = false,
127 };
128
129 static const struct host1x_info host1x05_info = {
130 .nb_channels = 14,
131 .nb_pts = 192,
132 .nb_mlocks = 16,
133 .nb_bases = 64,
134 .init = host1x05_init,
135 .sync_offset = 0x2100,
136 .dma_mask = DMA_BIT_MASK(34),
137 .has_wide_gather = false,
138 .has_hypervisor = false,
139 .num_sid_entries = 0,
140 .sid_table = NULL,
141 .reserve_vblank_syncpts = false,
142 };
143
144 static const struct host1x_sid_entry tegra186_sid_table[] = {
145 {
146 /* VIC */
147 .base = 0x1af0,
148 .offset = 0x30,
149 .limit = 0x34
150 },
151 {
152 /* NVDEC */
153 .base = 0x1b00,
154 .offset = 0x30,
155 .limit = 0x34
156 },
157 };
158
159 static const struct host1x_info host1x06_info = {
160 .nb_channels = 63,
161 .nb_pts = 576,
162 .nb_mlocks = 24,
163 .nb_bases = 16,
164 .init = host1x06_init,
165 .sync_offset = 0x0,
166 .dma_mask = DMA_BIT_MASK(40),
167 .has_wide_gather = true,
168 .has_hypervisor = true,
169 .num_sid_entries = ARRAY_SIZE(tegra186_sid_table),
170 .sid_table = tegra186_sid_table,
171 .reserve_vblank_syncpts = false,
172 .skip_reset_assert = true,
173 };
174
175 static const struct host1x_sid_entry tegra194_sid_table[] = {
176 {
177 /* VIC */
178 .base = 0x1af0,
179 .offset = 0x30,
180 .limit = 0x34
181 },
182 {
183 /* NVDEC */
184 .base = 0x1b00,
185 .offset = 0x30,
186 .limit = 0x34
187 },
188 {
189 /* NVDEC1 */
190 .base = 0x1bc0,
191 .offset = 0x30,
192 .limit = 0x34
193 },
194 };
195
196 static const struct host1x_info host1x07_info = {
197 .nb_channels = 63,
198 .nb_pts = 704,
199 .nb_mlocks = 32,
200 .nb_bases = 0,
201 .init = host1x07_init,
202 .sync_offset = 0x0,
203 .dma_mask = DMA_BIT_MASK(40),
204 .has_wide_gather = true,
205 .has_hypervisor = true,
206 .num_sid_entries = ARRAY_SIZE(tegra194_sid_table),
207 .sid_table = tegra194_sid_table,
208 .reserve_vblank_syncpts = false,
209 };
210
211 /*
212 * Tegra234 has two stream ID protection tables, one for setting stream IDs
213 * through the channel path via SETSTREAMID, and one for setting them via
214 * MMIO. We program each engine's data stream ID in the channel path table
215 * and firmware stream ID in the MMIO path table.
216 */
217 static const struct host1x_sid_entry tegra234_sid_table[] = {
218 {
219 /* SE2 MMIO */
220 .base = 0x1658,
221 .offset = 0x90,
222 .limit = 0x90
223 },
224 {
225 /* SE4 MMIO */
226 .base = 0x1660,
227 .offset = 0x90,
228 .limit = 0x90
229 },
230 {
231 /* SE2 channel */
232 .base = 0x1738,
233 .offset = 0x90,
234 .limit = 0x90
235 },
236 {
237 /* SE4 channel */
238 .base = 0x1740,
239 .offset = 0x90,
240 .limit = 0x90
241 },
242 {
243 /* VIC channel */
244 .base = 0x17b8,
245 .offset = 0x30,
246 .limit = 0x30
247 },
248 {
249 /* VIC MMIO */
250 .base = 0x1688,
251 .offset = 0x34,
252 .limit = 0x34
253 },
254 {
255 /* NVDEC channel */
256 .base = 0x17c8,
257 .offset = 0x30,
258 .limit = 0x30,
259 },
260 {
261 /* NVDEC MMIO */
262 .base = 0x1698,
263 .offset = 0x34,
264 .limit = 0x34,
265 },
266 };
267
268 static const struct host1x_info host1x08_info = {
269 .nb_channels = 63,
270 .nb_pts = 1024,
271 .nb_mlocks = 24,
272 .nb_bases = 0,
273 .init = host1x08_init,
274 .sync_offset = 0x0,
275 .dma_mask = DMA_BIT_MASK(40),
276 .has_wide_gather = true,
277 .has_hypervisor = true,
278 .has_common = true,
279 .num_sid_entries = ARRAY_SIZE(tegra234_sid_table),
280 .sid_table = tegra234_sid_table,
281 .streamid_vm_table = { 0x1004, 128 },
282 .classid_vm_table = { 0x1404, 25 },
283 .mmio_vm_table = { 0x1504, 25 },
284 .reserve_vblank_syncpts = false,
285 };
286
287 static const struct of_device_id host1x_of_match[] = {
288 { .compatible = "nvidia,tegra234-host1x", .data = &host1x08_info, },
289 { .compatible = "nvidia,tegra194-host1x", .data = &host1x07_info, },
290 { .compatible = "nvidia,tegra186-host1x", .data = &host1x06_info, },
291 { .compatible = "nvidia,tegra210-host1x", .data = &host1x05_info, },
292 { .compatible = "nvidia,tegra124-host1x", .data = &host1x04_info, },
293 { .compatible = "nvidia,tegra114-host1x", .data = &host1x02_info, },
294 { .compatible = "nvidia,tegra30-host1x", .data = &host1x01_info, },
295 { .compatible = "nvidia,tegra20-host1x", .data = &host1x01_info, },
296 { },
297 };
298 MODULE_DEVICE_TABLE(of, host1x_of_match);
299
host1x_setup_virtualization_tables(struct host1x * host)300 static void host1x_setup_virtualization_tables(struct host1x *host)
301 {
302 const struct host1x_info *info = host->info;
303 unsigned int i;
304
305 if (!info->has_hypervisor)
306 return;
307
308 for (i = 0; i < info->num_sid_entries; i++) {
309 const struct host1x_sid_entry *entry = &info->sid_table[i];
310
311 host1x_hypervisor_writel(host, entry->offset, entry->base);
312 host1x_hypervisor_writel(host, entry->limit, entry->base + 4);
313 }
314
315 for (i = 0; i < info->streamid_vm_table.count; i++) {
316 /* Allow access to all stream IDs to all VMs. */
317 host1x_hypervisor_writel(host, 0xff, info->streamid_vm_table.base + 4 * i);
318 }
319
320 for (i = 0; i < info->classid_vm_table.count; i++) {
321 /* Allow access to all classes to all VMs. */
322 host1x_hypervisor_writel(host, 0xff, info->classid_vm_table.base + 4 * i);
323 }
324
325 for (i = 0; i < info->mmio_vm_table.count; i++) {
326 /* Use VM1 (that's us) as originator VMID for engine MMIO accesses. */
327 host1x_hypervisor_writel(host, 0x1, info->mmio_vm_table.base + 4 * i);
328 }
329 }
330
host1x_wants_iommu(struct host1x * host1x)331 static bool host1x_wants_iommu(struct host1x *host1x)
332 {
333 /* Our IOMMU usage policy doesn't currently play well with GART */
334 if (of_machine_is_compatible("nvidia,tegra20"))
335 return false;
336
337 /*
338 * If we support addressing a maximum of 32 bits of physical memory
339 * and if the host1x firewall is enabled, there's no need to enable
340 * IOMMU support. This can happen for example on Tegra20, Tegra30
341 * and Tegra114.
342 *
343 * Tegra124 and later can address up to 34 bits of physical memory and
344 * many platforms come equipped with more than 2 GiB of system memory,
345 * which requires crossing the 4 GiB boundary. But there's a catch: on
346 * SoCs before Tegra186 (i.e. Tegra124 and Tegra210), the host1x can
347 * only address up to 32 bits of memory in GATHER opcodes, which means
348 * that command buffers need to either be in the first 2 GiB of system
349 * memory (which could quickly lead to memory exhaustion), or command
350 * buffers need to be treated differently from other buffers (which is
351 * not possible with the current ABI).
352 *
353 * A third option is to use the IOMMU in these cases to make sure all
354 * buffers will be mapped into a 32-bit IOVA space that host1x can
355 * address. This allows all of the system memory to be used and works
356 * within the limitations of the host1x on these SoCs.
357 *
358 * In summary, default to enable IOMMU on Tegra124 and later. For any
359 * of the earlier SoCs, only use the IOMMU for additional safety when
360 * the host1x firewall is disabled.
361 */
362 if (host1x->info->dma_mask <= DMA_BIT_MASK(32)) {
363 if (IS_ENABLED(CONFIG_TEGRA_HOST1X_FIREWALL))
364 return false;
365 }
366
367 return true;
368 }
369
370 /*
371 * Returns ERR_PTR on failure, NULL if the translation is IDENTITY, otherwise a
372 * valid paging domain.
373 */
host1x_iommu_attach(struct host1x * host)374 static struct iommu_domain *host1x_iommu_attach(struct host1x *host)
375 {
376 struct iommu_domain *domain = iommu_get_domain_for_dev(host->dev);
377 int err;
378
379 #if IS_ENABLED(CONFIG_ARM_DMA_USE_IOMMU)
380 if (host->dev->archdata.mapping) {
381 struct dma_iommu_mapping *mapping =
382 to_dma_iommu_mapping(host->dev);
383 arm_iommu_detach_device(host->dev);
384 arm_iommu_release_mapping(mapping);
385
386 domain = iommu_get_domain_for_dev(host->dev);
387 }
388 #endif
389
390 /*
391 * We may not always want to enable IOMMU support (for example if the
392 * host1x firewall is already enabled and we don't support addressing
393 * more than 32 bits of physical memory), so check for that first.
394 *
395 * Similarly, if host1x is already attached to an IOMMU (via the DMA
396 * API), don't try to attach again.
397 */
398 if (domain && domain->type == IOMMU_DOMAIN_IDENTITY)
399 domain = NULL;
400 if (!host1x_wants_iommu(host) || domain)
401 return domain;
402
403 host->group = iommu_group_get(host->dev);
404 if (host->group) {
405 struct iommu_domain_geometry *geometry;
406 dma_addr_t start, end;
407 unsigned long order;
408
409 err = iova_cache_get();
410 if (err < 0)
411 goto put_group;
412
413 host->domain = iommu_paging_domain_alloc(host->dev);
414 if (IS_ERR(host->domain)) {
415 err = PTR_ERR(host->domain);
416 host->domain = NULL;
417 goto put_cache;
418 }
419
420 err = iommu_attach_group(host->domain, host->group);
421 if (err) {
422 if (err == -ENODEV)
423 err = 0;
424
425 goto free_domain;
426 }
427
428 geometry = &host->domain->geometry;
429 start = geometry->aperture_start & host->info->dma_mask;
430 end = geometry->aperture_end & host->info->dma_mask;
431
432 order = __ffs(host->domain->pgsize_bitmap);
433 init_iova_domain(&host->iova, 1UL << order, start >> order);
434 host->iova_end = end;
435
436 domain = host->domain;
437 }
438
439 return domain;
440
441 free_domain:
442 iommu_domain_free(host->domain);
443 host->domain = NULL;
444 put_cache:
445 iova_cache_put();
446 put_group:
447 iommu_group_put(host->group);
448 host->group = NULL;
449
450 return ERR_PTR(err);
451 }
452
host1x_iommu_init(struct host1x * host)453 static int host1x_iommu_init(struct host1x *host)
454 {
455 u64 mask = host->info->dma_mask;
456 struct iommu_domain *domain;
457 int err;
458
459 domain = host1x_iommu_attach(host);
460 if (IS_ERR(domain)) {
461 err = PTR_ERR(domain);
462 dev_err(host->dev, "failed to attach to IOMMU: %d\n", err);
463 return err;
464 }
465
466 /*
467 * If we're not behind an IOMMU make sure we don't get push buffers
468 * that are allocated outside of the range addressable by the GATHER
469 * opcode.
470 *
471 * Newer generations of Tegra (Tegra186 and later) support a wide
472 * variant of the GATHER opcode that allows addressing more bits.
473 */
474 if (!domain && !host->info->has_wide_gather)
475 mask = DMA_BIT_MASK(32);
476
477 err = dma_coerce_mask_and_coherent(host->dev, mask);
478 if (err < 0) {
479 dev_err(host->dev, "failed to set DMA mask: %d\n", err);
480 return err;
481 }
482
483 return 0;
484 }
485
host1x_iommu_exit(struct host1x * host)486 static void host1x_iommu_exit(struct host1x *host)
487 {
488 if (host->domain) {
489 put_iova_domain(&host->iova);
490 iommu_detach_group(host->domain, host->group);
491
492 iommu_domain_free(host->domain);
493 host->domain = NULL;
494
495 iova_cache_put();
496
497 iommu_group_put(host->group);
498 host->group = NULL;
499 }
500 }
501
host1x_get_resets(struct host1x * host)502 static int host1x_get_resets(struct host1x *host)
503 {
504 int err;
505
506 host->resets[0].id = "mc";
507 host->resets[1].id = "host1x";
508 host->nresets = ARRAY_SIZE(host->resets);
509
510 err = devm_reset_control_bulk_get_optional_exclusive_released(
511 host->dev, host->nresets, host->resets);
512 if (err) {
513 dev_err(host->dev, "failed to get reset: %d\n", err);
514 return err;
515 }
516
517 return 0;
518 }
519
host1x_probe(struct platform_device * pdev)520 static int host1x_probe(struct platform_device *pdev)
521 {
522 struct host1x *host;
523 int err, i;
524
525 host = devm_kzalloc(&pdev->dev, sizeof(*host), GFP_KERNEL);
526 if (!host)
527 return -ENOMEM;
528
529 host->info = of_device_get_match_data(&pdev->dev);
530
531 if (host->info->has_hypervisor) {
532 host->regs = devm_platform_ioremap_resource_byname(pdev, "vm");
533 if (IS_ERR(host->regs))
534 return PTR_ERR(host->regs);
535
536 host->hv_regs = devm_platform_ioremap_resource_byname(pdev, "hypervisor");
537 if (IS_ERR(host->hv_regs))
538 return PTR_ERR(host->hv_regs);
539
540 if (host->info->has_common) {
541 host->common_regs = devm_platform_ioremap_resource_byname(pdev, "common");
542 if (IS_ERR(host->common_regs))
543 return PTR_ERR(host->common_regs);
544 }
545 } else {
546 host->regs = devm_platform_ioremap_resource(pdev, 0);
547 if (IS_ERR(host->regs))
548 return PTR_ERR(host->regs);
549 }
550
551 for (i = 0; i < ARRAY_SIZE(host->syncpt_irqs); i++) {
552 char irq_name[] = "syncptX";
553
554 sprintf(irq_name, "syncpt%d", i);
555
556 err = platform_get_irq_byname_optional(pdev, irq_name);
557 if (err == -ENXIO)
558 break;
559 if (err < 0)
560 return err;
561
562 host->syncpt_irqs[i] = err;
563 }
564
565 host->num_syncpt_irqs = i;
566
567 /* Device tree without irq names */
568 if (i == 0) {
569 host->syncpt_irqs[0] = platform_get_irq(pdev, 0);
570 if (host->syncpt_irqs[0] < 0)
571 return host->syncpt_irqs[0];
572
573 host->num_syncpt_irqs = 1;
574 }
575
576 mutex_init(&host->devices_lock);
577 INIT_LIST_HEAD(&host->devices);
578 INIT_LIST_HEAD(&host->list);
579 host->dev = &pdev->dev;
580
581 /* set common host1x device data */
582 platform_set_drvdata(pdev, host);
583
584 host->dev->dma_parms = &host->dma_parms;
585 dma_set_max_seg_size(host->dev, UINT_MAX);
586
587 if (host->info->init) {
588 err = host->info->init(host);
589 if (err)
590 return err;
591 }
592
593 host->clk = devm_clk_get(&pdev->dev, NULL);
594 if (IS_ERR(host->clk)) {
595 err = PTR_ERR(host->clk);
596
597 if (err != -EPROBE_DEFER)
598 dev_err(&pdev->dev, "failed to get clock: %d\n", err);
599
600 return err;
601 }
602
603 err = host1x_get_resets(host);
604 if (err)
605 return err;
606
607 host1x_bo_cache_init(&host->cache);
608
609 err = host1x_iommu_init(host);
610 if (err < 0) {
611 dev_err(&pdev->dev, "failed to setup IOMMU: %d\n", err);
612 goto destroy_cache;
613 }
614
615 err = host1x_channel_list_init(&host->channel_list,
616 host->info->nb_channels);
617 if (err) {
618 dev_err(&pdev->dev, "failed to initialize channel list\n");
619 goto iommu_exit;
620 }
621
622 err = host1x_memory_context_list_init(host);
623 if (err) {
624 dev_err(&pdev->dev, "failed to initialize context list\n");
625 goto free_channels;
626 }
627
628 err = host1x_syncpt_init(host);
629 if (err) {
630 dev_err(&pdev->dev, "failed to initialize syncpts\n");
631 goto free_contexts;
632 }
633
634 mutex_init(&host->intr_mutex);
635
636 pm_runtime_enable(&pdev->dev);
637
638 err = devm_tegra_core_dev_init_opp_table_common(&pdev->dev);
639 if (err)
640 goto pm_disable;
641
642 /* the driver's code isn't ready yet for the dynamic RPM */
643 err = pm_runtime_resume_and_get(&pdev->dev);
644 if (err)
645 goto pm_disable;
646
647 err = host1x_intr_init(host);
648 if (err) {
649 dev_err(&pdev->dev, "failed to initialize interrupts\n");
650 goto pm_put;
651 }
652
653 host1x_debug_init(host);
654
655 err = host1x_register(host);
656 if (err < 0)
657 goto deinit_debugfs;
658
659 err = devm_of_platform_populate(&pdev->dev);
660 if (err < 0)
661 goto unregister;
662
663 return 0;
664
665 unregister:
666 host1x_unregister(host);
667 deinit_debugfs:
668 host1x_debug_deinit(host);
669 host1x_intr_deinit(host);
670 pm_put:
671 pm_runtime_put_sync_suspend(&pdev->dev);
672 pm_disable:
673 pm_runtime_disable(&pdev->dev);
674 host1x_syncpt_deinit(host);
675 free_contexts:
676 host1x_memory_context_list_free(&host->context_list);
677 free_channels:
678 host1x_channel_list_free(&host->channel_list);
679 iommu_exit:
680 host1x_iommu_exit(host);
681 destroy_cache:
682 host1x_bo_cache_destroy(&host->cache);
683
684 return err;
685 }
686
host1x_remove(struct platform_device * pdev)687 static void host1x_remove(struct platform_device *pdev)
688 {
689 struct host1x *host = platform_get_drvdata(pdev);
690
691 host1x_unregister(host);
692 host1x_debug_deinit(host);
693
694 pm_runtime_force_suspend(&pdev->dev);
695
696 host1x_intr_deinit(host);
697 host1x_syncpt_deinit(host);
698 host1x_memory_context_list_free(&host->context_list);
699 host1x_channel_list_free(&host->channel_list);
700 host1x_iommu_exit(host);
701 host1x_bo_cache_destroy(&host->cache);
702 }
703
host1x_runtime_suspend(struct device * dev)704 static int __maybe_unused host1x_runtime_suspend(struct device *dev)
705 {
706 struct host1x *host = dev_get_drvdata(dev);
707 int err;
708
709 host1x_channel_stop_all(host);
710 host1x_intr_stop(host);
711 host1x_syncpt_save(host);
712
713 if (!host->info->skip_reset_assert) {
714 err = reset_control_bulk_assert(host->nresets, host->resets);
715 if (err) {
716 dev_err(dev, "failed to assert reset: %d\n", err);
717 goto resume_host1x;
718 }
719
720 usleep_range(1000, 2000);
721 }
722
723 clk_disable_unprepare(host->clk);
724 reset_control_bulk_release(host->nresets, host->resets);
725
726 return 0;
727
728 resume_host1x:
729 host1x_setup_virtualization_tables(host);
730 host1x_syncpt_restore(host);
731 host1x_intr_start(host);
732
733 return err;
734 }
735
host1x_runtime_resume(struct device * dev)736 static int __maybe_unused host1x_runtime_resume(struct device *dev)
737 {
738 struct host1x *host = dev_get_drvdata(dev);
739 int err;
740
741 err = reset_control_bulk_acquire(host->nresets, host->resets);
742 if (err) {
743 dev_err(dev, "failed to acquire reset: %d\n", err);
744 return err;
745 }
746
747 err = clk_prepare_enable(host->clk);
748 if (err) {
749 dev_err(dev, "failed to enable clock: %d\n", err);
750 goto release_reset;
751 }
752
753 err = reset_control_bulk_deassert(host->nresets, host->resets);
754 if (err < 0) {
755 dev_err(dev, "failed to deassert reset: %d\n", err);
756 goto disable_clk;
757 }
758
759 host1x_setup_virtualization_tables(host);
760 host1x_syncpt_restore(host);
761 host1x_intr_start(host);
762
763 return 0;
764
765 disable_clk:
766 clk_disable_unprepare(host->clk);
767 release_reset:
768 reset_control_bulk_release(host->nresets, host->resets);
769
770 return err;
771 }
772
773 static const struct dev_pm_ops host1x_pm_ops = {
774 SET_RUNTIME_PM_OPS(host1x_runtime_suspend, host1x_runtime_resume,
775 NULL)
776 SET_SYSTEM_SLEEP_PM_OPS(pm_runtime_force_suspend, pm_runtime_force_resume)
777 };
778
779 static struct platform_driver tegra_host1x_driver = {
780 .driver = {
781 .name = "tegra-host1x",
782 .of_match_table = host1x_of_match,
783 .pm = &host1x_pm_ops,
784 },
785 .probe = host1x_probe,
786 .remove_new = host1x_remove,
787 };
788
789 static struct platform_driver * const drivers[] = {
790 &tegra_host1x_driver,
791 &tegra_mipi_driver,
792 };
793
tegra_host1x_init(void)794 static int __init tegra_host1x_init(void)
795 {
796 int err;
797
798 err = bus_register(&host1x_bus_type);
799 if (err < 0)
800 return err;
801
802 err = platform_register_drivers(drivers, ARRAY_SIZE(drivers));
803 if (err < 0)
804 bus_unregister(&host1x_bus_type);
805
806 return err;
807 }
808 module_init(tegra_host1x_init);
809
tegra_host1x_exit(void)810 static void __exit tegra_host1x_exit(void)
811 {
812 platform_unregister_drivers(drivers, ARRAY_SIZE(drivers));
813 bus_unregister(&host1x_bus_type);
814 }
815 module_exit(tegra_host1x_exit);
816
817 /**
818 * host1x_get_dma_mask() - query the supported DMA mask for host1x
819 * @host1x: host1x instance
820 *
821 * Note that this returns the supported DMA mask for host1x, which can be
822 * different from the applicable DMA mask under certain circumstances.
823 */
host1x_get_dma_mask(struct host1x * host1x)824 u64 host1x_get_dma_mask(struct host1x *host1x)
825 {
826 return host1x->info->dma_mask;
827 }
828 EXPORT_SYMBOL(host1x_get_dma_mask);
829
830 MODULE_AUTHOR("Thierry Reding <thierry.reding@avionic-design.de>");
831 MODULE_AUTHOR("Terje Bergstrom <tbergstrom@nvidia.com>");
832 MODULE_DESCRIPTION("Host1x driver for Tegra products");
833 MODULE_LICENSE("GPL");
834