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5
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_devfreq.h"
18#include "panfrost_gem.h"
19#include "panfrost_mmu.h"
20#include "panfrost_job.h"
21#include "panfrost_gpu.h"
22#include "panfrost_perfcnt.h"
23
24static bool unstable_ioctls;
25module_param_unsafe(unstable_ioctls, bool, 0600);
26
27static int panfrost_ioctl_get_param(struct drm_device *ddev, void *data, struct drm_file *file)
28{
29 struct drm_panfrost_get_param *param = data;
30 struct panfrost_device *pfdev = ddev->dev_private;
31
32 if (param->pad != 0)
33 return -EINVAL;
34
35#define PANFROST_FEATURE(name, member) \
36 case DRM_PANFROST_PARAM_ ## name: \
37 param->value = pfdev->features.member; \
38 break
39#define PANFROST_FEATURE_ARRAY(name, member, max) \
40 case DRM_PANFROST_PARAM_ ## name ## 0 ... \
41 DRM_PANFROST_PARAM_ ## name ## max: \
42 param->value = pfdev->features.member[param->param - \
43 DRM_PANFROST_PARAM_ ## name ## 0]; \
44 break
45
46 switch (param->param) {
47 PANFROST_FEATURE(GPU_PROD_ID, id);
48 PANFROST_FEATURE(GPU_REVISION, revision);
49 PANFROST_FEATURE(SHADER_PRESENT, shader_present);
50 PANFROST_FEATURE(TILER_PRESENT, tiler_present);
51 PANFROST_FEATURE(L2_PRESENT, l2_present);
52 PANFROST_FEATURE(STACK_PRESENT, stack_present);
53 PANFROST_FEATURE(AS_PRESENT, as_present);
54 PANFROST_FEATURE(JS_PRESENT, js_present);
55 PANFROST_FEATURE(L2_FEATURES, l2_features);
56 PANFROST_FEATURE(CORE_FEATURES, core_features);
57 PANFROST_FEATURE(TILER_FEATURES, tiler_features);
58 PANFROST_FEATURE(MEM_FEATURES, mem_features);
59 PANFROST_FEATURE(MMU_FEATURES, mmu_features);
60 PANFROST_FEATURE(THREAD_FEATURES, thread_features);
61 PANFROST_FEATURE(MAX_THREADS, max_threads);
62 PANFROST_FEATURE(THREAD_MAX_WORKGROUP_SZ,
63 thread_max_workgroup_sz);
64 PANFROST_FEATURE(THREAD_MAX_BARRIER_SZ,
65 thread_max_barrier_sz);
66 PANFROST_FEATURE(COHERENCY_FEATURES, coherency_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 job->implicit_fences = kvmalloc_array(job->bo_count,
142 sizeof(struct dma_fence *),
143 GFP_KERNEL | __GFP_ZERO);
144 if (!job->implicit_fences)
145 return -ENOMEM;
146
147 ret = drm_gem_objects_lookup(file_priv,
148 (void __user *)(uintptr_t)args->bo_handles,
149 job->bo_count, &job->bos);
150 if (ret)
151 return ret;
152
153 job->mappings = kvmalloc_array(job->bo_count,
154 sizeof(struct panfrost_gem_mapping *),
155 GFP_KERNEL | __GFP_ZERO);
156 if (!job->mappings)
157 return -ENOMEM;
158
159 for (i = 0; i < job->bo_count; i++) {
160 struct panfrost_gem_mapping *mapping;
161
162 bo = to_panfrost_bo(job->bos[i]);
163 mapping = panfrost_gem_mapping_get(bo, priv);
164 if (!mapping) {
165 ret = -EINVAL;
166 break;
167 }
168
169 atomic_inc(&bo->gpu_usecount);
170 job->mappings[i] = mapping;
171 }
172
173 return ret;
174}
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189static int
190panfrost_copy_in_sync(struct drm_device *dev,
191 struct drm_file *file_priv,
192 struct drm_panfrost_submit *args,
193 struct panfrost_job *job)
194{
195 u32 *handles;
196 int ret = 0;
197 int i;
198
199 job->in_fence_count = args->in_sync_count;
200
201 if (!job->in_fence_count)
202 return 0;
203
204 job->in_fences = kvmalloc_array(job->in_fence_count,
205 sizeof(struct dma_fence *),
206 GFP_KERNEL | __GFP_ZERO);
207 if (!job->in_fences) {
208 DRM_DEBUG("Failed to allocate job in fences\n");
209 return -ENOMEM;
210 }
211
212 handles = kvmalloc_array(job->in_fence_count, sizeof(u32), GFP_KERNEL);
213 if (!handles) {
214 ret = -ENOMEM;
215 DRM_DEBUG("Failed to allocate incoming syncobj handles\n");
216 goto fail;
217 }
218
219 if (copy_from_user(handles,
220 (void __user *)(uintptr_t)args->in_syncs,
221 job->in_fence_count * sizeof(u32))) {
222 ret = -EFAULT;
223 DRM_DEBUG("Failed to copy in syncobj handles\n");
224 goto fail;
225 }
226
227 for (i = 0; i < job->in_fence_count; i++) {
228 ret = drm_syncobj_find_fence(file_priv, handles[i], 0, 0,
229 &job->in_fences[i]);
230 if (ret == -EINVAL)
231 goto fail;
232 }
233
234fail:
235 kvfree(handles);
236 return ret;
237}
238
239static int panfrost_ioctl_submit(struct drm_device *dev, void *data,
240 struct drm_file *file)
241{
242 struct panfrost_device *pfdev = dev->dev_private;
243 struct drm_panfrost_submit *args = data;
244 struct drm_syncobj *sync_out = NULL;
245 struct panfrost_job *job;
246 int ret = 0;
247
248 if (!args->jc)
249 return -EINVAL;
250
251 if (args->requirements && args->requirements != PANFROST_JD_REQ_FS)
252 return -EINVAL;
253
254 if (args->out_sync > 0) {
255 sync_out = drm_syncobj_find(file, args->out_sync);
256 if (!sync_out)
257 return -ENODEV;
258 }
259
260 job = kzalloc(sizeof(*job), GFP_KERNEL);
261 if (!job) {
262 ret = -ENOMEM;
263 goto fail_out_sync;
264 }
265
266 kref_init(&job->refcount);
267
268 job->pfdev = pfdev;
269 job->jc = args->jc;
270 job->requirements = args->requirements;
271 job->flush_id = panfrost_gpu_get_latest_flush_id(pfdev);
272 job->file_priv = file->driver_priv;
273
274 ret = panfrost_copy_in_sync(dev, file, args, job);
275 if (ret)
276 goto fail_job;
277
278 ret = panfrost_lookup_bos(dev, file, args, job);
279 if (ret)
280 goto fail_job;
281
282 ret = panfrost_job_push(job);
283 if (ret)
284 goto fail_job;
285
286
287 if (sync_out)
288 drm_syncobj_replace_fence(sync_out, job->render_done_fence);
289
290fail_job:
291 panfrost_job_put(job);
292fail_out_sync:
293 if (sync_out)
294 drm_syncobj_put(sync_out);
295
296 return ret;
297}
298
299static int
300panfrost_ioctl_wait_bo(struct drm_device *dev, void *data,
301 struct drm_file *file_priv)
302{
303 long ret;
304 struct drm_panfrost_wait_bo *args = data;
305 struct drm_gem_object *gem_obj;
306 unsigned long timeout = drm_timeout_abs_to_jiffies(args->timeout_ns);
307
308 if (args->pad)
309 return -EINVAL;
310
311 gem_obj = drm_gem_object_lookup(file_priv, args->handle);
312 if (!gem_obj)
313 return -ENOENT;
314
315 ret = dma_resv_wait_timeout_rcu(gem_obj->resv, true,
316 true, timeout);
317 if (!ret)
318 ret = timeout ? -ETIMEDOUT : -EBUSY;
319
320 drm_gem_object_put(gem_obj);
321
322 return ret;
323}
324
325static int panfrost_ioctl_mmap_bo(struct drm_device *dev, void *data,
326 struct drm_file *file_priv)
327{
328 struct drm_panfrost_mmap_bo *args = data;
329 struct drm_gem_object *gem_obj;
330 int ret;
331
332 if (args->flags != 0) {
333 DRM_INFO("unknown mmap_bo flags: %d\n", args->flags);
334 return -EINVAL;
335 }
336
337 gem_obj = drm_gem_object_lookup(file_priv, args->handle);
338 if (!gem_obj) {
339 DRM_DEBUG("Failed to look up GEM BO %d\n", args->handle);
340 return -ENOENT;
341 }
342
343
344 if (to_panfrost_bo(gem_obj)->is_heap) {
345 ret = -EINVAL;
346 goto out;
347 }
348
349 ret = drm_gem_create_mmap_offset(gem_obj);
350 if (ret == 0)
351 args->offset = drm_vma_node_offset_addr(&gem_obj->vma_node);
352
353out:
354 drm_gem_object_put(gem_obj);
355 return ret;
356}
357
358static int panfrost_ioctl_get_bo_offset(struct drm_device *dev, void *data,
359 struct drm_file *file_priv)
360{
361 struct panfrost_file_priv *priv = file_priv->driver_priv;
362 struct drm_panfrost_get_bo_offset *args = data;
363 struct panfrost_gem_mapping *mapping;
364 struct drm_gem_object *gem_obj;
365 struct panfrost_gem_object *bo;
366
367 gem_obj = drm_gem_object_lookup(file_priv, args->handle);
368 if (!gem_obj) {
369 DRM_DEBUG("Failed to look up GEM BO %d\n", args->handle);
370 return -ENOENT;
371 }
372 bo = to_panfrost_bo(gem_obj);
373
374 mapping = panfrost_gem_mapping_get(bo, priv);
375 drm_gem_object_put(gem_obj);
376
377 if (!mapping)
378 return -EINVAL;
379
380 args->offset = mapping->mmnode.start << PAGE_SHIFT;
381 panfrost_gem_mapping_put(mapping);
382 return 0;
383}
384
385static int panfrost_ioctl_madvise(struct drm_device *dev, void *data,
386 struct drm_file *file_priv)
387{
388 struct panfrost_file_priv *priv = file_priv->driver_priv;
389 struct drm_panfrost_madvise *args = data;
390 struct panfrost_device *pfdev = dev->dev_private;
391 struct drm_gem_object *gem_obj;
392 struct panfrost_gem_object *bo;
393 int ret = 0;
394
395 gem_obj = drm_gem_object_lookup(file_priv, args->handle);
396 if (!gem_obj) {
397 DRM_DEBUG("Failed to look up GEM BO %d\n", args->handle);
398 return -ENOENT;
399 }
400
401 bo = to_panfrost_bo(gem_obj);
402
403 mutex_lock(&pfdev->shrinker_lock);
404 mutex_lock(&bo->mappings.lock);
405 if (args->madv == PANFROST_MADV_DONTNEED) {
406 struct panfrost_gem_mapping *first;
407
408 first = list_first_entry(&bo->mappings.list,
409 struct panfrost_gem_mapping,
410 node);
411
412
413
414
415
416
417
418
419
420 if (!list_is_singular(&bo->mappings.list) ||
421 WARN_ON_ONCE(first->mmu != &priv->mmu)) {
422 ret = -EINVAL;
423 goto out_unlock_mappings;
424 }
425 }
426
427 args->retained = drm_gem_shmem_madvise(gem_obj, args->madv);
428
429 if (args->retained) {
430 if (args->madv == PANFROST_MADV_DONTNEED)
431 list_add_tail(&bo->base.madv_list,
432 &pfdev->shrinker_list);
433 else if (args->madv == PANFROST_MADV_WILLNEED)
434 list_del_init(&bo->base.madv_list);
435 }
436
437out_unlock_mappings:
438 mutex_unlock(&bo->mappings.lock);
439 mutex_unlock(&pfdev->shrinker_lock);
440
441 drm_gem_object_put(gem_obj);
442 return ret;
443}
444
445int panfrost_unstable_ioctl_check(void)
446{
447 if (!unstable_ioctls)
448 return -ENOSYS;
449
450 return 0;
451}
452
453#define PFN_4G (SZ_4G >> PAGE_SHIFT)
454#define PFN_4G_MASK (PFN_4G - 1)
455#define PFN_16M (SZ_16M >> PAGE_SHIFT)
456
457static void panfrost_drm_mm_color_adjust(const struct drm_mm_node *node,
458 unsigned long color,
459 u64 *start, u64 *end)
460{
461
462 if (!(color & PANFROST_BO_NOEXEC)) {
463 u64 next_seg;
464
465 if ((*start & PFN_4G_MASK) == 0)
466 (*start)++;
467
468 if ((*end & PFN_4G_MASK) == 0)
469 (*end)--;
470
471 next_seg = ALIGN(*start, PFN_4G);
472 if (next_seg - *start <= PFN_16M)
473 *start = next_seg + 1;
474
475 *end = min(*end, ALIGN(*start, PFN_4G) - 1);
476 }
477}
478
479static int
480panfrost_open(struct drm_device *dev, struct drm_file *file)
481{
482 int ret;
483 struct panfrost_device *pfdev = dev->dev_private;
484 struct panfrost_file_priv *panfrost_priv;
485
486 panfrost_priv = kzalloc(sizeof(*panfrost_priv), GFP_KERNEL);
487 if (!panfrost_priv)
488 return -ENOMEM;
489
490 panfrost_priv->pfdev = pfdev;
491 file->driver_priv = panfrost_priv;
492
493 spin_lock_init(&panfrost_priv->mm_lock);
494
495
496 drm_mm_init(&panfrost_priv->mm, SZ_32M >> PAGE_SHIFT, (SZ_4G - SZ_32M) >> PAGE_SHIFT);
497 panfrost_priv->mm.color_adjust = panfrost_drm_mm_color_adjust;
498
499 ret = panfrost_mmu_pgtable_alloc(panfrost_priv);
500 if (ret)
501 goto err_pgtable;
502
503 ret = panfrost_job_open(panfrost_priv);
504 if (ret)
505 goto err_job;
506
507 return 0;
508
509err_job:
510 panfrost_mmu_pgtable_free(panfrost_priv);
511err_pgtable:
512 drm_mm_takedown(&panfrost_priv->mm);
513 kfree(panfrost_priv);
514 return ret;
515}
516
517static void
518panfrost_postclose(struct drm_device *dev, struct drm_file *file)
519{
520 struct panfrost_file_priv *panfrost_priv = file->driver_priv;
521
522 panfrost_perfcnt_close(file);
523 panfrost_job_close(panfrost_priv);
524
525 panfrost_mmu_pgtable_free(panfrost_priv);
526 drm_mm_takedown(&panfrost_priv->mm);
527 kfree(panfrost_priv);
528}
529
530static const struct drm_ioctl_desc panfrost_drm_driver_ioctls[] = {
531#define PANFROST_IOCTL(n, func, flags) \
532 DRM_IOCTL_DEF_DRV(PANFROST_##n, panfrost_ioctl_##func, flags)
533
534 PANFROST_IOCTL(SUBMIT, submit, DRM_RENDER_ALLOW),
535 PANFROST_IOCTL(WAIT_BO, wait_bo, DRM_RENDER_ALLOW),
536 PANFROST_IOCTL(CREATE_BO, create_bo, DRM_RENDER_ALLOW),
537 PANFROST_IOCTL(MMAP_BO, mmap_bo, DRM_RENDER_ALLOW),
538 PANFROST_IOCTL(GET_PARAM, get_param, DRM_RENDER_ALLOW),
539 PANFROST_IOCTL(GET_BO_OFFSET, get_bo_offset, DRM_RENDER_ALLOW),
540 PANFROST_IOCTL(PERFCNT_ENABLE, perfcnt_enable, DRM_RENDER_ALLOW),
541 PANFROST_IOCTL(PERFCNT_DUMP, perfcnt_dump, DRM_RENDER_ALLOW),
542 PANFROST_IOCTL(MADVISE, madvise, DRM_RENDER_ALLOW),
543};
544
545DEFINE_DRM_GEM_FOPS(panfrost_drm_driver_fops);
546
547
548
549
550
551
552static struct drm_driver panfrost_drm_driver = {
553 .driver_features = DRIVER_RENDER | DRIVER_GEM | DRIVER_SYNCOBJ,
554 .open = panfrost_open,
555 .postclose = panfrost_postclose,
556 .ioctls = panfrost_drm_driver_ioctls,
557 .num_ioctls = ARRAY_SIZE(panfrost_drm_driver_ioctls),
558 .fops = &panfrost_drm_driver_fops,
559 .name = "panfrost",
560 .desc = "panfrost DRM",
561 .date = "20180908",
562 .major = 1,
563 .minor = 1,
564
565 .gem_create_object = panfrost_gem_create_object,
566 .prime_handle_to_fd = drm_gem_prime_handle_to_fd,
567 .prime_fd_to_handle = drm_gem_prime_fd_to_handle,
568 .gem_prime_import_sg_table = panfrost_gem_prime_import_sg_table,
569 .gem_prime_mmap = drm_gem_prime_mmap,
570};
571
572static int panfrost_probe(struct platform_device *pdev)
573{
574 struct panfrost_device *pfdev;
575 struct drm_device *ddev;
576 int err;
577
578 pfdev = devm_kzalloc(&pdev->dev, sizeof(*pfdev), GFP_KERNEL);
579 if (!pfdev)
580 return -ENOMEM;
581
582 pfdev->pdev = pdev;
583 pfdev->dev = &pdev->dev;
584
585 platform_set_drvdata(pdev, pfdev);
586
587 pfdev->comp = of_device_get_match_data(&pdev->dev);
588 if (!pfdev->comp)
589 return -ENODEV;
590
591
592 ddev = drm_dev_alloc(&panfrost_drm_driver, &pdev->dev);
593 if (IS_ERR(ddev))
594 return PTR_ERR(ddev);
595
596 ddev->dev_private = pfdev;
597 pfdev->ddev = ddev;
598
599 mutex_init(&pfdev->shrinker_lock);
600 INIT_LIST_HEAD(&pfdev->shrinker_list);
601
602 err = panfrost_device_init(pfdev);
603 if (err) {
604 if (err != -EPROBE_DEFER)
605 dev_err(&pdev->dev, "Fatal error during GPU init\n");
606 goto err_out0;
607 }
608
609 err = panfrost_devfreq_init(pfdev);
610 if (err) {
611 if (err != -EPROBE_DEFER)
612 dev_err(&pdev->dev, "Fatal error during devfreq init\n");
613 goto err_out1;
614 }
615
616 pm_runtime_set_active(pfdev->dev);
617 pm_runtime_mark_last_busy(pfdev->dev);
618 pm_runtime_enable(pfdev->dev);
619 pm_runtime_set_autosuspend_delay(pfdev->dev, 50);
620 pm_runtime_use_autosuspend(pfdev->dev);
621
622
623
624
625
626 err = drm_dev_register(ddev, 0);
627 if (err < 0)
628 goto err_out2;
629
630 panfrost_gem_shrinker_init(ddev);
631
632 return 0;
633
634err_out2:
635 pm_runtime_disable(pfdev->dev);
636 panfrost_devfreq_fini(pfdev);
637err_out1:
638 panfrost_device_fini(pfdev);
639err_out0:
640 drm_dev_put(ddev);
641 return err;
642}
643
644static int panfrost_remove(struct platform_device *pdev)
645{
646 struct panfrost_device *pfdev = platform_get_drvdata(pdev);
647 struct drm_device *ddev = pfdev->ddev;
648
649 drm_dev_unregister(ddev);
650 panfrost_gem_shrinker_cleanup(ddev);
651
652 pm_runtime_get_sync(pfdev->dev);
653 panfrost_devfreq_fini(pfdev);
654 panfrost_device_fini(pfdev);
655 pm_runtime_put_sync_suspend(pfdev->dev);
656 pm_runtime_disable(pfdev->dev);
657
658 drm_dev_put(ddev);
659 return 0;
660}
661
662static const char * const default_supplies[] = { "mali" };
663static const struct panfrost_compatible default_data = {
664 .num_supplies = ARRAY_SIZE(default_supplies),
665 .supply_names = default_supplies,
666 .num_pm_domains = 1,
667 .pm_domain_names = NULL,
668};
669
670static const struct of_device_id dt_match[] = {
671 { .compatible = "arm,mali-t604", .data = &default_data, },
672 { .compatible = "arm,mali-t624", .data = &default_data, },
673 { .compatible = "arm,mali-t628", .data = &default_data, },
674 { .compatible = "arm,mali-t720", .data = &default_data, },
675 { .compatible = "arm,mali-t760", .data = &default_data, },
676 { .compatible = "arm,mali-t820", .data = &default_data, },
677 { .compatible = "arm,mali-t830", .data = &default_data, },
678 { .compatible = "arm,mali-t860", .data = &default_data, },
679 { .compatible = "arm,mali-t880", .data = &default_data, },
680 {}
681};
682MODULE_DEVICE_TABLE(of, dt_match);
683
684static const struct dev_pm_ops panfrost_pm_ops = {
685 SET_SYSTEM_SLEEP_PM_OPS(pm_runtime_force_suspend, pm_runtime_force_resume)
686 SET_RUNTIME_PM_OPS(panfrost_device_suspend, panfrost_device_resume, NULL)
687};
688
689static struct platform_driver panfrost_driver = {
690 .probe = panfrost_probe,
691 .remove = panfrost_remove,
692 .driver = {
693 .name = "panfrost",
694 .pm = &panfrost_pm_ops,
695 .of_match_table = dt_match,
696 },
697};
698module_platform_driver(panfrost_driver);
699
700MODULE_AUTHOR("Panfrost Project Developers");
701MODULE_DESCRIPTION("Panfrost DRM Driver");
702MODULE_LICENSE("GPL v2");
703
