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6#include <linux/module.h>
7#include <linux/of_platform.h>
8#include <linux/pagemap.h>
9#include <linux/pm_runtime.h>
10#include <drm/panfrost_drm.h>
11#include <drm/drm_drv.h>
12#include <drm/drm_ioctl.h>
13#include <drm/drm_syncobj.h>
14#include <drm/drm_utils.h>
15
16#include "panfrost_device.h"
17#include "panfrost_gem.h"
18#include "panfrost_mmu.h"
19#include "panfrost_job.h"
20#include "panfrost_gpu.h"
21#include "panfrost_perfcnt.h"
22
23static bool unstable_ioctls;
24module_param_unsafe(unstable_ioctls, bool, 0600);
25
26static int panfrost_ioctl_get_param(struct drm_device *ddev, void *data, struct drm_file *file)
27{
28 struct drm_panfrost_get_param *param = data;
29 struct panfrost_device *pfdev = ddev->dev_private;
30
31 if (param->pad != 0)
32 return -EINVAL;
33
34#define PANFROST_FEATURE(name, member) \
35 case DRM_PANFROST_PARAM_ ## name: \
36 param->value = pfdev->features.member; \
37 break
38#define PANFROST_FEATURE_ARRAY(name, member, max) \
39 case DRM_PANFROST_PARAM_ ## name ## 0 ... \
40 DRM_PANFROST_PARAM_ ## name ## max: \
41 param->value = pfdev->features.member[param->param - \
42 DRM_PANFROST_PARAM_ ## name ## 0]; \
43 break
44
45 switch (param->param) {
46 PANFROST_FEATURE(GPU_PROD_ID, id);
47 PANFROST_FEATURE(GPU_REVISION, revision);
48 PANFROST_FEATURE(SHADER_PRESENT, shader_present);
49 PANFROST_FEATURE(TILER_PRESENT, tiler_present);
50 PANFROST_FEATURE(L2_PRESENT, l2_present);
51 PANFROST_FEATURE(STACK_PRESENT, stack_present);
52 PANFROST_FEATURE(AS_PRESENT, as_present);
53 PANFROST_FEATURE(JS_PRESENT, js_present);
54 PANFROST_FEATURE(L2_FEATURES, l2_features);
55 PANFROST_FEATURE(CORE_FEATURES, core_features);
56 PANFROST_FEATURE(TILER_FEATURES, tiler_features);
57 PANFROST_FEATURE(MEM_FEATURES, mem_features);
58 PANFROST_FEATURE(MMU_FEATURES, mmu_features);
59 PANFROST_FEATURE(THREAD_FEATURES, thread_features);
60 PANFROST_FEATURE(MAX_THREADS, max_threads);
61 PANFROST_FEATURE(THREAD_MAX_WORKGROUP_SZ,
62 thread_max_workgroup_sz);
63 PANFROST_FEATURE(THREAD_MAX_BARRIER_SZ,
64 thread_max_barrier_sz);
65 PANFROST_FEATURE(COHERENCY_FEATURES, coherency_features);
66 PANFROST_FEATURE(AFBC_FEATURES, afbc_features);
67 PANFROST_FEATURE_ARRAY(TEXTURE_FEATURES, texture_features, 3);
68 PANFROST_FEATURE_ARRAY(JS_FEATURES, js_features, 15);
69 PANFROST_FEATURE(NR_CORE_GROUPS, nr_core_groups);
70 PANFROST_FEATURE(THREAD_TLS_ALLOC, thread_tls_alloc);
71 default:
72 return -EINVAL;
73 }
74
75 return 0;
76}
77
78static int panfrost_ioctl_create_bo(struct drm_device *dev, void *data,
79 struct drm_file *file)
80{
81 struct panfrost_file_priv *priv = file->driver_priv;
82 struct panfrost_gem_object *bo;
83 struct drm_panfrost_create_bo *args = data;
84 struct panfrost_gem_mapping *mapping;
85
86 if (!args->size || args->pad ||
87 (args->flags & ~(PANFROST_BO_NOEXEC | PANFROST_BO_HEAP)))
88 return -EINVAL;
89
90
91 if ((args->flags & PANFROST_BO_HEAP) &&
92 !(args->flags & PANFROST_BO_NOEXEC))
93 return -EINVAL;
94
95 bo = panfrost_gem_create_with_handle(file, dev, args->size, args->flags,
96 &args->handle);
97 if (IS_ERR(bo))
98 return PTR_ERR(bo);
99
100 mapping = panfrost_gem_mapping_get(bo, priv);
101 if (!mapping) {
102 drm_gem_object_put(&bo->base.base);
103 return -EINVAL;
104 }
105
106 args->offset = mapping->mmnode.start << PAGE_SHIFT;
107 panfrost_gem_mapping_put(mapping);
108
109 return 0;
110}
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125static int
126panfrost_lookup_bos(struct drm_device *dev,
127 struct drm_file *file_priv,
128 struct drm_panfrost_submit *args,
129 struct panfrost_job *job)
130{
131 struct panfrost_file_priv *priv = file_priv->driver_priv;
132 struct panfrost_gem_object *bo;
133 unsigned int i;
134 int ret;
135
136 job->bo_count = args->bo_handle_count;
137
138 if (!job->bo_count)
139 return 0;
140
141 ret = drm_gem_objects_lookup(file_priv,
142 (void __user *)(uintptr_t)args->bo_handles,
143 job->bo_count, &job->bos);
144 if (ret)
145 return ret;
146
147 job->mappings = kvmalloc_array(job->bo_count,
148 sizeof(struct panfrost_gem_mapping *),
149 GFP_KERNEL | __GFP_ZERO);
150 if (!job->mappings)
151 return -ENOMEM;
152
153 for (i = 0; i < job->bo_count; i++) {
154 struct panfrost_gem_mapping *mapping;
155
156 bo = to_panfrost_bo(job->bos[i]);
157 mapping = panfrost_gem_mapping_get(bo, priv);
158 if (!mapping) {
159 ret = -EINVAL;
160 break;
161 }
162
163 atomic_inc(&bo->gpu_usecount);
164 job->mappings[i] = mapping;
165 }
166
167 return ret;
168}
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183static int
184panfrost_copy_in_sync(struct drm_device *dev,
185 struct drm_file *file_priv,
186 struct drm_panfrost_submit *args,
187 struct panfrost_job *job)
188{
189 u32 *handles;
190 int ret = 0;
191 int i, in_fence_count;
192
193 in_fence_count = args->in_sync_count;
194
195 if (!in_fence_count)
196 return 0;
197
198 handles = kvmalloc_array(in_fence_count, sizeof(u32), GFP_KERNEL);
199 if (!handles) {
200 ret = -ENOMEM;
201 DRM_DEBUG("Failed to allocate incoming syncobj handles\n");
202 goto fail;
203 }
204
205 if (copy_from_user(handles,
206 (void __user *)(uintptr_t)args->in_syncs,
207 in_fence_count * sizeof(u32))) {
208 ret = -EFAULT;
209 DRM_DEBUG("Failed to copy in syncobj handles\n");
210 goto fail;
211 }
212
213 for (i = 0; i < in_fence_count; i++) {
214 struct dma_fence *fence;
215
216 ret = drm_syncobj_find_fence(file_priv, handles[i], 0, 0,
217 &fence);
218 if (ret)
219 goto fail;
220
221 ret = drm_gem_fence_array_add(&job->deps, fence);
222
223 if (ret)
224 goto fail;
225 }
226
227fail:
228 kvfree(handles);
229 return ret;
230}
231
232static int panfrost_ioctl_submit(struct drm_device *dev, void *data,
233 struct drm_file *file)
234{
235 struct panfrost_device *pfdev = dev->dev_private;
236 struct drm_panfrost_submit *args = data;
237 struct drm_syncobj *sync_out = NULL;
238 struct panfrost_job *job;
239 int ret = 0;
240
241 if (!args->jc)
242 return -EINVAL;
243
244 if (args->requirements && args->requirements != PANFROST_JD_REQ_FS)
245 return -EINVAL;
246
247 if (args->out_sync > 0) {
248 sync_out = drm_syncobj_find(file, args->out_sync);
249 if (!sync_out)
250 return -ENODEV;
251 }
252
253 job = kzalloc(sizeof(*job), GFP_KERNEL);
254 if (!job) {
255 ret = -ENOMEM;
256 goto fail_out_sync;
257 }
258
259 kref_init(&job->refcount);
260
261 xa_init_flags(&job->deps, XA_FLAGS_ALLOC);
262
263 job->pfdev = pfdev;
264 job->jc = args->jc;
265 job->requirements = args->requirements;
266 job->flush_id = panfrost_gpu_get_latest_flush_id(pfdev);
267 job->file_priv = file->driver_priv;
268
269 ret = panfrost_copy_in_sync(dev, file, args, job);
270 if (ret)
271 goto fail_job;
272
273 ret = panfrost_lookup_bos(dev, file, args, job);
274 if (ret)
275 goto fail_job;
276
277 ret = panfrost_job_push(job);
278 if (ret)
279 goto fail_job;
280
281
282 if (sync_out)
283 drm_syncobj_replace_fence(sync_out, job->render_done_fence);
284
285fail_job:
286 panfrost_job_put(job);
287fail_out_sync:
288 if (sync_out)
289 drm_syncobj_put(sync_out);
290
291 return ret;
292}
293
294static int
295panfrost_ioctl_wait_bo(struct drm_device *dev, void *data,
296 struct drm_file *file_priv)
297{
298 long ret;
299 struct drm_panfrost_wait_bo *args = data;
300 struct drm_gem_object *gem_obj;
301 unsigned long timeout = drm_timeout_abs_to_jiffies(args->timeout_ns);
302
303 if (args->pad)
304 return -EINVAL;
305
306 gem_obj = drm_gem_object_lookup(file_priv, args->handle);
307 if (!gem_obj)
308 return -ENOENT;
309
310 ret = dma_resv_wait_timeout(gem_obj->resv, true, true, timeout);
311 if (!ret)
312 ret = timeout ? -ETIMEDOUT : -EBUSY;
313
314 drm_gem_object_put(gem_obj);
315
316 return ret;
317}
318
319static int panfrost_ioctl_mmap_bo(struct drm_device *dev, void *data,
320 struct drm_file *file_priv)
321{
322 struct drm_panfrost_mmap_bo *args = data;
323 struct drm_gem_object *gem_obj;
324 int ret;
325
326 if (args->flags != 0) {
327 DRM_INFO("unknown mmap_bo flags: %d\n", args->flags);
328 return -EINVAL;
329 }
330
331 gem_obj = drm_gem_object_lookup(file_priv, args->handle);
332 if (!gem_obj) {
333 DRM_DEBUG("Failed to look up GEM BO %d\n", args->handle);
334 return -ENOENT;
335 }
336
337
338 if (to_panfrost_bo(gem_obj)->is_heap) {
339 ret = -EINVAL;
340 goto out;
341 }
342
343 ret = drm_gem_create_mmap_offset(gem_obj);
344 if (ret == 0)
345 args->offset = drm_vma_node_offset_addr(&gem_obj->vma_node);
346
347out:
348 drm_gem_object_put(gem_obj);
349 return ret;
350}
351
352static int panfrost_ioctl_get_bo_offset(struct drm_device *dev, void *data,
353 struct drm_file *file_priv)
354{
355 struct panfrost_file_priv *priv = file_priv->driver_priv;
356 struct drm_panfrost_get_bo_offset *args = data;
357 struct panfrost_gem_mapping *mapping;
358 struct drm_gem_object *gem_obj;
359 struct panfrost_gem_object *bo;
360
361 gem_obj = drm_gem_object_lookup(file_priv, args->handle);
362 if (!gem_obj) {
363 DRM_DEBUG("Failed to look up GEM BO %d\n", args->handle);
364 return -ENOENT;
365 }
366 bo = to_panfrost_bo(gem_obj);
367
368 mapping = panfrost_gem_mapping_get(bo, priv);
369 drm_gem_object_put(gem_obj);
370
371 if (!mapping)
372 return -EINVAL;
373
374 args->offset = mapping->mmnode.start << PAGE_SHIFT;
375 panfrost_gem_mapping_put(mapping);
376 return 0;
377}
378
379static int panfrost_ioctl_madvise(struct drm_device *dev, void *data,
380 struct drm_file *file_priv)
381{
382 struct panfrost_file_priv *priv = file_priv->driver_priv;
383 struct drm_panfrost_madvise *args = data;
384 struct panfrost_device *pfdev = dev->dev_private;
385 struct drm_gem_object *gem_obj;
386 struct panfrost_gem_object *bo;
387 int ret = 0;
388
389 gem_obj = drm_gem_object_lookup(file_priv, args->handle);
390 if (!gem_obj) {
391 DRM_DEBUG("Failed to look up GEM BO %d\n", args->handle);
392 return -ENOENT;
393 }
394
395 bo = to_panfrost_bo(gem_obj);
396
397 mutex_lock(&pfdev->shrinker_lock);
398 mutex_lock(&bo->mappings.lock);
399 if (args->madv == PANFROST_MADV_DONTNEED) {
400 struct panfrost_gem_mapping *first;
401
402 first = list_first_entry(&bo->mappings.list,
403 struct panfrost_gem_mapping,
404 node);
405
406
407
408
409
410
411
412
413
414 if (!list_is_singular(&bo->mappings.list) ||
415 WARN_ON_ONCE(first->mmu != priv->mmu)) {
416 ret = -EINVAL;
417 goto out_unlock_mappings;
418 }
419 }
420
421 args->retained = drm_gem_shmem_madvise(gem_obj, args->madv);
422
423 if (args->retained) {
424 if (args->madv == PANFROST_MADV_DONTNEED)
425 list_add_tail(&bo->base.madv_list,
426 &pfdev->shrinker_list);
427 else if (args->madv == PANFROST_MADV_WILLNEED)
428 list_del_init(&bo->base.madv_list);
429 }
430
431out_unlock_mappings:
432 mutex_unlock(&bo->mappings.lock);
433 mutex_unlock(&pfdev->shrinker_lock);
434
435 drm_gem_object_put(gem_obj);
436 return ret;
437}
438
439int panfrost_unstable_ioctl_check(void)
440{
441 if (!unstable_ioctls)
442 return -ENOSYS;
443
444 return 0;
445}
446
447static int
448panfrost_open(struct drm_device *dev, struct drm_file *file)
449{
450 int ret;
451 struct panfrost_device *pfdev = dev->dev_private;
452 struct panfrost_file_priv *panfrost_priv;
453
454 panfrost_priv = kzalloc(sizeof(*panfrost_priv), GFP_KERNEL);
455 if (!panfrost_priv)
456 return -ENOMEM;
457
458 panfrost_priv->pfdev = pfdev;
459 file->driver_priv = panfrost_priv;
460
461 panfrost_priv->mmu = panfrost_mmu_ctx_create(pfdev);
462 if (IS_ERR(panfrost_priv->mmu)) {
463 ret = PTR_ERR(panfrost_priv->mmu);
464 goto err_free;
465 }
466
467 ret = panfrost_job_open(panfrost_priv);
468 if (ret)
469 goto err_job;
470
471 return 0;
472
473err_job:
474 panfrost_mmu_ctx_put(panfrost_priv->mmu);
475err_free:
476 kfree(panfrost_priv);
477 return ret;
478}
479
480static void
481panfrost_postclose(struct drm_device *dev, struct drm_file *file)
482{
483 struct panfrost_file_priv *panfrost_priv = file->driver_priv;
484
485 panfrost_perfcnt_close(file);
486 panfrost_job_close(panfrost_priv);
487
488 panfrost_mmu_ctx_put(panfrost_priv->mmu);
489 kfree(panfrost_priv);
490}
491
492static const struct drm_ioctl_desc panfrost_drm_driver_ioctls[] = {
493#define PANFROST_IOCTL(n, func, flags) \
494 DRM_IOCTL_DEF_DRV(PANFROST_##n, panfrost_ioctl_##func, flags)
495
496 PANFROST_IOCTL(SUBMIT, submit, DRM_RENDER_ALLOW),
497 PANFROST_IOCTL(WAIT_BO, wait_bo, DRM_RENDER_ALLOW),
498 PANFROST_IOCTL(CREATE_BO, create_bo, DRM_RENDER_ALLOW),
499 PANFROST_IOCTL(MMAP_BO, mmap_bo, DRM_RENDER_ALLOW),
500 PANFROST_IOCTL(GET_PARAM, get_param, DRM_RENDER_ALLOW),
501 PANFROST_IOCTL(GET_BO_OFFSET, get_bo_offset, DRM_RENDER_ALLOW),
502 PANFROST_IOCTL(PERFCNT_ENABLE, perfcnt_enable, DRM_RENDER_ALLOW),
503 PANFROST_IOCTL(PERFCNT_DUMP, perfcnt_dump, DRM_RENDER_ALLOW),
504 PANFROST_IOCTL(MADVISE, madvise, DRM_RENDER_ALLOW),
505};
506
507DEFINE_DRM_GEM_FOPS(panfrost_drm_driver_fops);
508
509
510
511
512
513
514
515static const struct drm_driver panfrost_drm_driver = {
516 .driver_features = DRIVER_RENDER | DRIVER_GEM | DRIVER_SYNCOBJ,
517 .open = panfrost_open,
518 .postclose = panfrost_postclose,
519 .ioctls = panfrost_drm_driver_ioctls,
520 .num_ioctls = ARRAY_SIZE(panfrost_drm_driver_ioctls),
521 .fops = &panfrost_drm_driver_fops,
522 .name = "panfrost",
523 .desc = "panfrost DRM",
524 .date = "20180908",
525 .major = 1,
526 .minor = 2,
527
528 .gem_create_object = panfrost_gem_create_object,
529 .prime_handle_to_fd = drm_gem_prime_handle_to_fd,
530 .prime_fd_to_handle = drm_gem_prime_fd_to_handle,
531 .gem_prime_import_sg_table = panfrost_gem_prime_import_sg_table,
532 .gem_prime_mmap = drm_gem_prime_mmap,
533};
534
535static int panfrost_probe(struct platform_device *pdev)
536{
537 struct panfrost_device *pfdev;
538 struct drm_device *ddev;
539 int err;
540
541 pfdev = devm_kzalloc(&pdev->dev, sizeof(*pfdev), GFP_KERNEL);
542 if (!pfdev)
543 return -ENOMEM;
544
545 pfdev->pdev = pdev;
546 pfdev->dev = &pdev->dev;
547
548 platform_set_drvdata(pdev, pfdev);
549
550 pfdev->comp = of_device_get_match_data(&pdev->dev);
551 if (!pfdev->comp)
552 return -ENODEV;
553
554 pfdev->coherent = device_get_dma_attr(&pdev->dev) == DEV_DMA_COHERENT;
555
556
557 ddev = drm_dev_alloc(&panfrost_drm_driver, &pdev->dev);
558 if (IS_ERR(ddev))
559 return PTR_ERR(ddev);
560
561 ddev->dev_private = pfdev;
562 pfdev->ddev = ddev;
563
564 mutex_init(&pfdev->shrinker_lock);
565 INIT_LIST_HEAD(&pfdev->shrinker_list);
566
567 err = panfrost_device_init(pfdev);
568 if (err) {
569 if (err != -EPROBE_DEFER)
570 dev_err(&pdev->dev, "Fatal error during GPU init\n");
571 goto err_out0;
572 }
573
574 pm_runtime_set_active(pfdev->dev);
575 pm_runtime_mark_last_busy(pfdev->dev);
576 pm_runtime_enable(pfdev->dev);
577 pm_runtime_set_autosuspend_delay(pfdev->dev, 50);
578 pm_runtime_use_autosuspend(pfdev->dev);
579
580
581
582
583
584 err = drm_dev_register(ddev, 0);
585 if (err < 0)
586 goto err_out1;
587
588 panfrost_gem_shrinker_init(ddev);
589
590 return 0;
591
592err_out1:
593 pm_runtime_disable(pfdev->dev);
594 panfrost_device_fini(pfdev);
595 pm_runtime_set_suspended(pfdev->dev);
596err_out0:
597 drm_dev_put(ddev);
598 return err;
599}
600
601static int panfrost_remove(struct platform_device *pdev)
602{
603 struct panfrost_device *pfdev = platform_get_drvdata(pdev);
604 struct drm_device *ddev = pfdev->ddev;
605
606 drm_dev_unregister(ddev);
607 panfrost_gem_shrinker_cleanup(ddev);
608
609 pm_runtime_get_sync(pfdev->dev);
610 pm_runtime_disable(pfdev->dev);
611 panfrost_device_fini(pfdev);
612 pm_runtime_set_suspended(pfdev->dev);
613
614 drm_dev_put(ddev);
615 return 0;
616}
617
618static const char * const default_supplies[] = { "mali" };
619static const struct panfrost_compatible default_data = {
620 .num_supplies = ARRAY_SIZE(default_supplies),
621 .supply_names = default_supplies,
622 .num_pm_domains = 1,
623 .pm_domain_names = NULL,
624};
625
626static const struct panfrost_compatible amlogic_data = {
627 .num_supplies = ARRAY_SIZE(default_supplies),
628 .supply_names = default_supplies,
629 .vendor_quirk = panfrost_gpu_amlogic_quirk,
630};
631
632const char * const mediatek_mt8183_supplies[] = { "mali", "sram" };
633const char * const mediatek_mt8183_pm_domains[] = { "core0", "core1", "core2" };
634static const struct panfrost_compatible mediatek_mt8183_data = {
635 .num_supplies = ARRAY_SIZE(mediatek_mt8183_supplies),
636 .supply_names = mediatek_mt8183_supplies,
637 .num_pm_domains = ARRAY_SIZE(mediatek_mt8183_pm_domains),
638 .pm_domain_names = mediatek_mt8183_pm_domains,
639};
640
641static const struct of_device_id dt_match[] = {
642
643 { .compatible = "amlogic,meson-gxm-mali",
644 .data = &amlogic_data, },
645 { .compatible = "amlogic,meson-g12a-mali",
646 .data = &amlogic_data, },
647 { .compatible = "arm,mali-t604", .data = &default_data, },
648 { .compatible = "arm,mali-t624", .data = &default_data, },
649 { .compatible = "arm,mali-t628", .data = &default_data, },
650 { .compatible = "arm,mali-t720", .data = &default_data, },
651 { .compatible = "arm,mali-t760", .data = &default_data, },
652 { .compatible = "arm,mali-t820", .data = &default_data, },
653 { .compatible = "arm,mali-t830", .data = &default_data, },
654 { .compatible = "arm,mali-t860", .data = &default_data, },
655 { .compatible = "arm,mali-t880", .data = &default_data, },
656 { .compatible = "arm,mali-bifrost", .data = &default_data, },
657 { .compatible = "mediatek,mt8183-mali", .data = &mediatek_mt8183_data },
658 {}
659};
660MODULE_DEVICE_TABLE(of, dt_match);
661
662static const struct dev_pm_ops panfrost_pm_ops = {
663 SET_SYSTEM_SLEEP_PM_OPS(pm_runtime_force_suspend, pm_runtime_force_resume)
664 SET_RUNTIME_PM_OPS(panfrost_device_suspend, panfrost_device_resume, NULL)
665};
666
667static struct platform_driver panfrost_driver = {
668 .probe = panfrost_probe,
669 .remove = panfrost_remove,
670 .driver = {
671 .name = "panfrost",
672 .pm = &panfrost_pm_ops,
673 .of_match_table = dt_match,
674 },
675};
676module_platform_driver(panfrost_driver);
677
678MODULE_AUTHOR("Panfrost Project Developers");
679MODULE_DESCRIPTION("Panfrost DRM Driver");
680MODULE_LICENSE("GPL v2");
681
