1// SPDX-License-Identifier: GPL-2.0
2/* Copyright 2018 Marty E. Plummer <hanetzer@startmail.com> */
3/* Copyright 2019 Linaro, Ltd., Rob Herring <robh@kernel.org> */
4/* Copyright 2019 Collabora ltd. */
5
6#ifdef CONFIG_ARM_ARCH_TIMER
7#include <asm/arch_timer.h>
8#endif
9
10#include <linux/module.h>
11#include <linux/of.h>
12#include <linux/pagemap.h>
13#include <linux/platform_device.h>
14#include <linux/pm_runtime.h>
15#include <drm/panfrost_drm.h>
16#include <drm/drm_drv.h>
17#include <drm/drm_ioctl.h>
18#include <drm/drm_syncobj.h>
19#include <drm/drm_utils.h>
20
21#include "panfrost_device.h"
22#include "panfrost_gem.h"
23#include "panfrost_mmu.h"
24#include "panfrost_job.h"
25#include "panfrost_gpu.h"
26#include "panfrost_perfcnt.h"
27
28#define JOB_REQUIREMENTS (PANFROST_JD_REQ_FS | PANFROST_JD_REQ_CYCLE_COUNT)
29
30static bool unstable_ioctls;
31module_param_unsafe(unstable_ioctls, bool, 0600);
32
33static int panfrost_ioctl_query_timestamp(struct panfrost_device *pfdev,
34 u64 *arg)
35{
36 int ret;
37
38 ret = pm_runtime_resume_and_get(dev: pfdev->dev);
39 if (ret)
40 return ret;
41
42 panfrost_cycle_counter_get(pfdev);
43 *arg = panfrost_timestamp_read(pfdev);
44 panfrost_cycle_counter_put(pfdev);
45
46 pm_runtime_put(dev: pfdev->dev);
47 return 0;
48}
49
50static int panfrost_ioctl_get_param(struct drm_device *ddev, void *data, struct drm_file *file)
51{
52 struct drm_panfrost_get_param *param = data;
53 struct panfrost_device *pfdev = ddev->dev_private;
54 int ret;
55
56 if (param->pad != 0)
57 return -EINVAL;
58
59#define PANFROST_FEATURE(name, member) \
60 case DRM_PANFROST_PARAM_ ## name: \
61 param->value = pfdev->features.member; \
62 break
63#define PANFROST_FEATURE_ARRAY(name, member, max) \
64 case DRM_PANFROST_PARAM_ ## name ## 0 ... \
65 DRM_PANFROST_PARAM_ ## name ## max: \
66 param->value = pfdev->features.member[param->param - \
67 DRM_PANFROST_PARAM_ ## name ## 0]; \
68 break
69
70 switch (param->param) {
71 PANFROST_FEATURE(GPU_PROD_ID, id);
72 PANFROST_FEATURE(GPU_REVISION, revision);
73 PANFROST_FEATURE(SHADER_PRESENT, shader_present);
74 PANFROST_FEATURE(TILER_PRESENT, tiler_present);
75 PANFROST_FEATURE(L2_PRESENT, l2_present);
76 PANFROST_FEATURE(STACK_PRESENT, stack_present);
77 PANFROST_FEATURE(AS_PRESENT, as_present);
78 PANFROST_FEATURE(JS_PRESENT, js_present);
79 PANFROST_FEATURE(L2_FEATURES, l2_features);
80 PANFROST_FEATURE(CORE_FEATURES, core_features);
81 PANFROST_FEATURE(TILER_FEATURES, tiler_features);
82 PANFROST_FEATURE(MEM_FEATURES, mem_features);
83 PANFROST_FEATURE(MMU_FEATURES, mmu_features);
84 PANFROST_FEATURE(THREAD_FEATURES, thread_features);
85 PANFROST_FEATURE(MAX_THREADS, max_threads);
86 PANFROST_FEATURE(THREAD_MAX_WORKGROUP_SZ,
87 thread_max_workgroup_sz);
88 PANFROST_FEATURE(THREAD_MAX_BARRIER_SZ,
89 thread_max_barrier_sz);
90 PANFROST_FEATURE(COHERENCY_FEATURES, coherency_features);
91 PANFROST_FEATURE(AFBC_FEATURES, afbc_features);
92 PANFROST_FEATURE_ARRAY(TEXTURE_FEATURES, texture_features, 3);
93 PANFROST_FEATURE_ARRAY(JS_FEATURES, js_features, 15);
94 PANFROST_FEATURE(NR_CORE_GROUPS, nr_core_groups);
95 PANFROST_FEATURE(THREAD_TLS_ALLOC, thread_tls_alloc);
96
97 case DRM_PANFROST_PARAM_SYSTEM_TIMESTAMP:
98 ret = panfrost_ioctl_query_timestamp(pfdev, arg: &param->value);
99 if (ret)
100 return ret;
101 break;
102
103 case DRM_PANFROST_PARAM_SYSTEM_TIMESTAMP_FREQUENCY:
104#ifdef CONFIG_ARM_ARCH_TIMER
105 param->value = arch_timer_get_cntfrq();
106#else
107 param->value = 0;
108#endif
109 break;
110
111 default:
112 return -EINVAL;
113 }
114
115 return 0;
116}
117
118static int panfrost_ioctl_create_bo(struct drm_device *dev, void *data,
119 struct drm_file *file)
120{
121 struct panfrost_file_priv *priv = file->driver_priv;
122 struct panfrost_gem_object *bo;
123 struct drm_panfrost_create_bo *args = data;
124 struct panfrost_gem_mapping *mapping;
125 int ret;
126
127 if (!args->size || args->pad ||
128 (args->flags & ~(PANFROST_BO_NOEXEC | PANFROST_BO_HEAP)))
129 return -EINVAL;
130
131 /* Heaps should never be executable */
132 if ((args->flags & PANFROST_BO_HEAP) &&
133 !(args->flags & PANFROST_BO_NOEXEC))
134 return -EINVAL;
135
136 bo = panfrost_gem_create(dev, size: args->size, flags: args->flags);
137 if (IS_ERR(ptr: bo))
138 return PTR_ERR(ptr: bo);
139
140 ret = drm_gem_handle_create(file_priv: file, obj: &bo->base.base, handlep: &args->handle);
141 if (ret)
142 goto out;
143
144 mapping = panfrost_gem_mapping_get(bo, priv);
145 if (mapping) {
146 args->offset = mapping->mmnode.start << PAGE_SHIFT;
147 panfrost_gem_mapping_put(mapping);
148 } else {
149 /* This can only happen if the handle from
150 * drm_gem_handle_create() has already been guessed and freed
151 * by user space
152 */
153 ret = -EINVAL;
154 }
155
156out:
157 drm_gem_object_put(obj: &bo->base.base);
158 return ret;
159}
160
161/**
162 * panfrost_lookup_bos() - Sets up job->bo[] with the GEM objects
163 * referenced by the job.
164 * @dev: DRM device
165 * @file_priv: DRM file for this fd
166 * @args: IOCTL args
167 * @job: job being set up
168 *
169 * Resolve handles from userspace to BOs and attach them to job.
170 *
171 * Note that this function doesn't need to unreference the BOs on
172 * failure, because that will happen at panfrost_job_cleanup() time.
173 */
174static int
175panfrost_lookup_bos(struct drm_device *dev,
176 struct drm_file *file_priv,
177 struct drm_panfrost_submit *args,
178 struct panfrost_job *job)
179{
180 struct panfrost_file_priv *priv = file_priv->driver_priv;
181 struct panfrost_gem_object *bo;
182 unsigned int i;
183 int ret;
184
185 job->bo_count = args->bo_handle_count;
186
187 if (!job->bo_count)
188 return 0;
189
190 ret = drm_gem_objects_lookup(filp: file_priv,
191 bo_handles: (void __user *)(uintptr_t)args->bo_handles,
192 count: job->bo_count, objs_out: &job->bos);
193 if (ret)
194 return ret;
195
196 job->mappings = kvmalloc_array(job->bo_count,
197 sizeof(struct panfrost_gem_mapping *),
198 GFP_KERNEL | __GFP_ZERO);
199 if (!job->mappings)
200 return -ENOMEM;
201
202 for (i = 0; i < job->bo_count; i++) {
203 struct panfrost_gem_mapping *mapping;
204
205 bo = to_panfrost_bo(obj: job->bos[i]);
206 mapping = panfrost_gem_mapping_get(bo, priv);
207 if (!mapping) {
208 ret = -EINVAL;
209 break;
210 }
211
212 atomic_inc(v: &bo->gpu_usecount);
213 job->mappings[i] = mapping;
214 }
215
216 return ret;
217}
218
219/**
220 * panfrost_copy_in_sync() - Sets up job->deps with the sync objects
221 * referenced by the job.
222 * @dev: DRM device
223 * @file_priv: DRM file for this fd
224 * @args: IOCTL args
225 * @job: job being set up
226 *
227 * Resolve syncobjs from userspace to fences and attach them to job.
228 *
229 * Note that this function doesn't need to unreference the fences on
230 * failure, because that will happen at panfrost_job_cleanup() time.
231 */
232static int
233panfrost_copy_in_sync(struct drm_device *dev,
234 struct drm_file *file_priv,
235 struct drm_panfrost_submit *args,
236 struct panfrost_job *job)
237{
238 u32 *handles;
239 int ret = 0;
240 int i, in_fence_count;
241
242 in_fence_count = args->in_sync_count;
243
244 if (!in_fence_count)
245 return 0;
246
247 handles = kvmalloc_array(in_fence_count, sizeof(u32), GFP_KERNEL);
248 if (!handles) {
249 ret = -ENOMEM;
250 DRM_DEBUG("Failed to allocate incoming syncobj handles\n");
251 goto fail;
252 }
253
254 if (copy_from_user(to: handles,
255 from: (void __user *)(uintptr_t)args->in_syncs,
256 n: in_fence_count * sizeof(u32))) {
257 ret = -EFAULT;
258 DRM_DEBUG("Failed to copy in syncobj handles\n");
259 goto fail;
260 }
261
262 for (i = 0; i < in_fence_count; i++) {
263 ret = drm_sched_job_add_syncobj_dependency(job: &job->base, file: file_priv,
264 handle: handles[i], point: 0);
265 if (ret)
266 goto fail;
267 }
268
269fail:
270 kvfree(addr: handles);
271 return ret;
272}
273
274static int panfrost_ioctl_submit(struct drm_device *dev, void *data,
275 struct drm_file *file)
276{
277 struct panfrost_device *pfdev = dev->dev_private;
278 struct panfrost_file_priv *file_priv = file->driver_priv;
279 struct drm_panfrost_submit *args = data;
280 struct drm_syncobj *sync_out = NULL;
281 struct panfrost_job *job;
282 int ret = 0, slot;
283
284 if (!args->jc)
285 return -EINVAL;
286
287 if (args->requirements & ~JOB_REQUIREMENTS)
288 return -EINVAL;
289
290 if (args->out_sync > 0) {
291 sync_out = drm_syncobj_find(file_private: file, handle: args->out_sync);
292 if (!sync_out)
293 return -ENODEV;
294 }
295
296 job = kzalloc(sizeof(*job), GFP_KERNEL);
297 if (!job) {
298 ret = -ENOMEM;
299 goto out_put_syncout;
300 }
301
302 kref_init(kref: &job->refcount);
303
304 job->pfdev = pfdev;
305 job->jc = args->jc;
306 job->requirements = args->requirements;
307 job->flush_id = panfrost_gpu_get_latest_flush_id(pfdev);
308 job->mmu = file_priv->mmu;
309 job->engine_usage = &file_priv->engine_usage;
310
311 slot = panfrost_job_get_slot(job);
312
313 ret = drm_sched_job_init(job: &job->base,
314 entity: &file_priv->sched_entity[slot],
315 credits: 1, NULL);
316 if (ret)
317 goto out_put_job;
318
319 ret = panfrost_copy_in_sync(dev, file_priv: file, args, job);
320 if (ret)
321 goto out_cleanup_job;
322
323 ret = panfrost_lookup_bos(dev, file_priv: file, args, job);
324 if (ret)
325 goto out_cleanup_job;
326
327 ret = panfrost_job_push(job);
328 if (ret)
329 goto out_cleanup_job;
330
331 /* Update the return sync object for the job */
332 if (sync_out)
333 drm_syncobj_replace_fence(syncobj: sync_out, fence: job->render_done_fence);
334
335out_cleanup_job:
336 if (ret)
337 drm_sched_job_cleanup(job: &job->base);
338out_put_job:
339 panfrost_job_put(job);
340out_put_syncout:
341 if (sync_out)
342 drm_syncobj_put(obj: sync_out);
343
344 return ret;
345}
346
347static int
348panfrost_ioctl_wait_bo(struct drm_device *dev, void *data,
349 struct drm_file *file_priv)
350{
351 long ret;
352 struct drm_panfrost_wait_bo *args = data;
353 struct drm_gem_object *gem_obj;
354 unsigned long timeout = drm_timeout_abs_to_jiffies(timeout_nsec: args->timeout_ns);
355
356 if (args->pad)
357 return -EINVAL;
358
359 gem_obj = drm_gem_object_lookup(filp: file_priv, handle: args->handle);
360 if (!gem_obj)
361 return -ENOENT;
362
363 ret = dma_resv_wait_timeout(obj: gem_obj->resv, usage: DMA_RESV_USAGE_READ,
364 intr: true, timeout);
365 if (!ret)
366 ret = timeout ? -ETIMEDOUT : -EBUSY;
367
368 drm_gem_object_put(obj: gem_obj);
369
370 return ret;
371}
372
373static int panfrost_ioctl_mmap_bo(struct drm_device *dev, void *data,
374 struct drm_file *file_priv)
375{
376 struct drm_panfrost_mmap_bo *args = data;
377 struct drm_gem_object *gem_obj;
378 int ret;
379
380 if (args->flags != 0) {
381 DRM_INFO("unknown mmap_bo flags: %d\n", args->flags);
382 return -EINVAL;
383 }
384
385 gem_obj = drm_gem_object_lookup(filp: file_priv, handle: args->handle);
386 if (!gem_obj) {
387 DRM_DEBUG("Failed to look up GEM BO %d\n", args->handle);
388 return -ENOENT;
389 }
390
391 /* Don't allow mmapping of heap objects as pages are not pinned. */
392 if (to_panfrost_bo(obj: gem_obj)->is_heap) {
393 ret = -EINVAL;
394 goto out;
395 }
396
397 ret = drm_gem_create_mmap_offset(obj: gem_obj);
398 if (ret == 0)
399 args->offset = drm_vma_node_offset_addr(node: &gem_obj->vma_node);
400
401out:
402 drm_gem_object_put(obj: gem_obj);
403 return ret;
404}
405
406static int panfrost_ioctl_get_bo_offset(struct drm_device *dev, void *data,
407 struct drm_file *file_priv)
408{
409 struct panfrost_file_priv *priv = file_priv->driver_priv;
410 struct drm_panfrost_get_bo_offset *args = data;
411 struct panfrost_gem_mapping *mapping;
412 struct drm_gem_object *gem_obj;
413 struct panfrost_gem_object *bo;
414
415 gem_obj = drm_gem_object_lookup(filp: file_priv, handle: args->handle);
416 if (!gem_obj) {
417 DRM_DEBUG("Failed to look up GEM BO %d\n", args->handle);
418 return -ENOENT;
419 }
420 bo = to_panfrost_bo(obj: gem_obj);
421
422 mapping = panfrost_gem_mapping_get(bo, priv);
423 drm_gem_object_put(obj: gem_obj);
424
425 if (!mapping)
426 return -EINVAL;
427
428 args->offset = mapping->mmnode.start << PAGE_SHIFT;
429 panfrost_gem_mapping_put(mapping);
430 return 0;
431}
432
433static int panfrost_ioctl_madvise(struct drm_device *dev, void *data,
434 struct drm_file *file_priv)
435{
436 struct panfrost_file_priv *priv = file_priv->driver_priv;
437 struct drm_panfrost_madvise *args = data;
438 struct panfrost_device *pfdev = dev->dev_private;
439 struct drm_gem_object *gem_obj;
440 struct panfrost_gem_object *bo;
441 int ret = 0;
442
443 gem_obj = drm_gem_object_lookup(filp: file_priv, handle: args->handle);
444 if (!gem_obj) {
445 DRM_DEBUG("Failed to look up GEM BO %d\n", args->handle);
446 return -ENOENT;
447 }
448
449 bo = to_panfrost_bo(obj: gem_obj);
450
451 ret = dma_resv_lock_interruptible(obj: bo->base.base.resv, NULL);
452 if (ret)
453 goto out_put_object;
454
455 mutex_lock(&pfdev->shrinker_lock);
456 mutex_lock(&bo->mappings.lock);
457 if (args->madv == PANFROST_MADV_DONTNEED) {
458 struct panfrost_gem_mapping *first;
459
460 first = list_first_entry(&bo->mappings.list,
461 struct panfrost_gem_mapping,
462 node);
463
464 /*
465 * If we want to mark the BO purgeable, there must be only one
466 * user: the caller FD.
467 * We could do something smarter and mark the BO purgeable only
468 * when all its users have marked it purgeable, but globally
469 * visible/shared BOs are likely to never be marked purgeable
470 * anyway, so let's not bother.
471 */
472 if (!list_is_singular(head: &bo->mappings.list) ||
473 WARN_ON_ONCE(first->mmu != priv->mmu)) {
474 ret = -EINVAL;
475 goto out_unlock_mappings;
476 }
477 }
478
479 args->retained = drm_gem_shmem_madvise_locked(shmem: &bo->base, madv: args->madv);
480
481 if (args->retained) {
482 if (args->madv == PANFROST_MADV_DONTNEED)
483 list_move_tail(list: &bo->base.madv_list,
484 head: &pfdev->shrinker_list);
485 else if (args->madv == PANFROST_MADV_WILLNEED)
486 list_del_init(entry: &bo->base.madv_list);
487 }
488
489out_unlock_mappings:
490 mutex_unlock(lock: &bo->mappings.lock);
491 mutex_unlock(lock: &pfdev->shrinker_lock);
492 dma_resv_unlock(obj: bo->base.base.resv);
493out_put_object:
494 drm_gem_object_put(obj: gem_obj);
495 return ret;
496}
497
498int panfrost_unstable_ioctl_check(void)
499{
500 if (!unstable_ioctls)
501 return -ENOSYS;
502
503 return 0;
504}
505
506static int
507panfrost_open(struct drm_device *dev, struct drm_file *file)
508{
509 int ret;
510 struct panfrost_device *pfdev = dev->dev_private;
511 struct panfrost_file_priv *panfrost_priv;
512
513 panfrost_priv = kzalloc(sizeof(*panfrost_priv), GFP_KERNEL);
514 if (!panfrost_priv)
515 return -ENOMEM;
516
517 panfrost_priv->pfdev = pfdev;
518 file->driver_priv = panfrost_priv;
519
520 panfrost_priv->mmu = panfrost_mmu_ctx_create(pfdev);
521 if (IS_ERR(ptr: panfrost_priv->mmu)) {
522 ret = PTR_ERR(ptr: panfrost_priv->mmu);
523 goto err_free;
524 }
525
526 ret = panfrost_job_open(panfrost_priv);
527 if (ret)
528 goto err_job;
529
530 return 0;
531
532err_job:
533 panfrost_mmu_ctx_put(mmu: panfrost_priv->mmu);
534err_free:
535 kfree(objp: panfrost_priv);
536 return ret;
537}
538
539static void
540panfrost_postclose(struct drm_device *dev, struct drm_file *file)
541{
542 struct panfrost_file_priv *panfrost_priv = file->driver_priv;
543
544 panfrost_perfcnt_close(file_priv: file);
545 panfrost_job_close(panfrost_priv);
546
547 panfrost_mmu_ctx_put(mmu: panfrost_priv->mmu);
548 kfree(objp: panfrost_priv);
549}
550
551static const struct drm_ioctl_desc panfrost_drm_driver_ioctls[] = {
552#define PANFROST_IOCTL(n, func, flags) \
553 DRM_IOCTL_DEF_DRV(PANFROST_##n, panfrost_ioctl_##func, flags)
554
555 PANFROST_IOCTL(SUBMIT, submit, DRM_RENDER_ALLOW),
556 PANFROST_IOCTL(WAIT_BO, wait_bo, DRM_RENDER_ALLOW),
557 PANFROST_IOCTL(CREATE_BO, create_bo, DRM_RENDER_ALLOW),
558 PANFROST_IOCTL(MMAP_BO, mmap_bo, DRM_RENDER_ALLOW),
559 PANFROST_IOCTL(GET_PARAM, get_param, DRM_RENDER_ALLOW),
560 PANFROST_IOCTL(GET_BO_OFFSET, get_bo_offset, DRM_RENDER_ALLOW),
561 PANFROST_IOCTL(PERFCNT_ENABLE, perfcnt_enable, DRM_RENDER_ALLOW),
562 PANFROST_IOCTL(PERFCNT_DUMP, perfcnt_dump, DRM_RENDER_ALLOW),
563 PANFROST_IOCTL(MADVISE, madvise, DRM_RENDER_ALLOW),
564};
565
566static void panfrost_gpu_show_fdinfo(struct panfrost_device *pfdev,
567 struct panfrost_file_priv *panfrost_priv,
568 struct drm_printer *p)
569{
570 int i;
571
572 /*
573 * IMPORTANT NOTE: drm-cycles and drm-engine measurements are not
574 * accurate, as they only provide a rough estimation of the number of
575 * GPU cycles and CPU time spent in a given context. This is due to two
576 * different factors:
577 * - Firstly, we must consider the time the CPU and then the kernel
578 * takes to process the GPU interrupt, which means additional time and
579 * GPU cycles will be added in excess to the real figure.
580 * - Secondly, the pipelining done by the Job Manager (2 job slots per
581 * engine) implies there is no way to know exactly how much time each
582 * job spent on the GPU.
583 */
584
585 static const char * const engine_names[] = {
586 "fragment", "vertex-tiler", "compute-only"
587 };
588
589 BUILD_BUG_ON(ARRAY_SIZE(engine_names) != NUM_JOB_SLOTS);
590
591 for (i = 0; i < NUM_JOB_SLOTS - 1; i++) {
592 if (pfdev->profile_mode) {
593 drm_printf(p, f: "drm-engine-%s:\t%llu ns\n",
594 engine_names[i], panfrost_priv->engine_usage.elapsed_ns[i]);
595 drm_printf(p, f: "drm-cycles-%s:\t%llu\n",
596 engine_names[i], panfrost_priv->engine_usage.cycles[i]);
597 }
598 drm_printf(p, f: "drm-maxfreq-%s:\t%lu Hz\n",
599 engine_names[i], pfdev->pfdevfreq.fast_rate);
600 drm_printf(p, f: "drm-curfreq-%s:\t%lu Hz\n",
601 engine_names[i], pfdev->pfdevfreq.current_frequency);
602 }
603}
604
605static void panfrost_show_fdinfo(struct drm_printer *p, struct drm_file *file)
606{
607 struct drm_device *dev = file->minor->dev;
608 struct panfrost_device *pfdev = dev->dev_private;
609
610 panfrost_gpu_show_fdinfo(pfdev, panfrost_priv: file->driver_priv, p);
611
612 drm_show_memory_stats(p, file);
613}
614
615static const struct file_operations panfrost_drm_driver_fops = {
616 .owner = THIS_MODULE,
617 DRM_GEM_FOPS,
618 .show_fdinfo = drm_show_fdinfo,
619};
620
621/*
622 * Panfrost driver version:
623 * - 1.0 - initial interface
624 * - 1.1 - adds HEAP and NOEXEC flags for CREATE_BO
625 * - 1.2 - adds AFBC_FEATURES query
626 * - 1.3 - adds JD_REQ_CYCLE_COUNT job requirement for SUBMIT
627 * - adds SYSTEM_TIMESTAMP and SYSTEM_TIMESTAMP_FREQUENCY queries
628 */
629static const struct drm_driver panfrost_drm_driver = {
630 .driver_features = DRIVER_RENDER | DRIVER_GEM | DRIVER_SYNCOBJ,
631 .open = panfrost_open,
632 .postclose = panfrost_postclose,
633 .show_fdinfo = panfrost_show_fdinfo,
634 .ioctls = panfrost_drm_driver_ioctls,
635 .num_ioctls = ARRAY_SIZE(panfrost_drm_driver_ioctls),
636 .fops = &panfrost_drm_driver_fops,
637 .name = "panfrost",
638 .desc = "panfrost DRM",
639 .major = 1,
640 .minor = 3,
641
642 .gem_create_object = panfrost_gem_create_object,
643 .gem_prime_import_sg_table = panfrost_gem_prime_import_sg_table,
644};
645
646static int panfrost_probe(struct platform_device *pdev)
647{
648 struct panfrost_device *pfdev;
649 struct drm_device *ddev;
650 int err;
651
652 pfdev = devm_kzalloc(dev: &pdev->dev, size: sizeof(*pfdev), GFP_KERNEL);
653 if (!pfdev)
654 return -ENOMEM;
655
656 pfdev->pdev = pdev;
657 pfdev->dev = &pdev->dev;
658
659 platform_set_drvdata(pdev, data: pfdev);
660
661 pfdev->comp = of_device_get_match_data(dev: &pdev->dev);
662 if (!pfdev->comp)
663 return -ENODEV;
664
665 pfdev->coherent = device_get_dma_attr(dev: &pdev->dev) == DEV_DMA_COHERENT;
666
667 /* Allocate and initialize the DRM device. */
668 ddev = drm_dev_alloc(driver: &panfrost_drm_driver, parent: &pdev->dev);
669 if (IS_ERR(ptr: ddev))
670 return PTR_ERR(ptr: ddev);
671
672 ddev->dev_private = pfdev;
673 pfdev->ddev = ddev;
674
675 mutex_init(&pfdev->shrinker_lock);
676 INIT_LIST_HEAD(list: &pfdev->shrinker_list);
677
678 err = panfrost_device_init(pfdev);
679 if (err) {
680 if (err != -EPROBE_DEFER)
681 dev_err(&pdev->dev, "Fatal error during GPU init\n");
682 goto err_out0;
683 }
684
685 pm_runtime_set_active(dev: pfdev->dev);
686 pm_runtime_mark_last_busy(dev: pfdev->dev);
687 pm_runtime_enable(dev: pfdev->dev);
688 pm_runtime_set_autosuspend_delay(dev: pfdev->dev, delay: 50); /* ~3 frames */
689 pm_runtime_use_autosuspend(dev: pfdev->dev);
690
691 /*
692 * Register the DRM device with the core and the connectors with
693 * sysfs
694 */
695 err = drm_dev_register(dev: ddev, flags: 0);
696 if (err < 0)
697 goto err_out1;
698
699 err = panfrost_gem_shrinker_init(dev: ddev);
700 if (err)
701 goto err_out2;
702
703 return 0;
704
705err_out2:
706 drm_dev_unregister(dev: ddev);
707err_out1:
708 pm_runtime_disable(dev: pfdev->dev);
709 panfrost_device_fini(pfdev);
710 pm_runtime_set_suspended(dev: pfdev->dev);
711err_out0:
712 drm_dev_put(dev: ddev);
713 return err;
714}
715
716static void panfrost_remove(struct platform_device *pdev)
717{
718 struct panfrost_device *pfdev = platform_get_drvdata(pdev);
719 struct drm_device *ddev = pfdev->ddev;
720
721 drm_dev_unregister(dev: ddev);
722 panfrost_gem_shrinker_cleanup(dev: ddev);
723
724 pm_runtime_get_sync(dev: pfdev->dev);
725 pm_runtime_disable(dev: pfdev->dev);
726 panfrost_device_fini(pfdev);
727 pm_runtime_set_suspended(dev: pfdev->dev);
728
729 drm_dev_put(dev: ddev);
730}
731
732static ssize_t profiling_show(struct device *dev,
733 struct device_attribute *attr, char *buf)
734{
735 struct panfrost_device *pfdev = dev_get_drvdata(dev);
736
737 return sysfs_emit(buf, fmt: "%d\n", pfdev->profile_mode);
738}
739
740static ssize_t profiling_store(struct device *dev,
741 struct device_attribute *attr,
742 const char *buf, size_t len)
743{
744 struct panfrost_device *pfdev = dev_get_drvdata(dev);
745 bool value;
746 int err;
747
748 err = kstrtobool(s: buf, res: &value);
749 if (err)
750 return err;
751
752 pfdev->profile_mode = value;
753
754 return len;
755}
756
757static DEVICE_ATTR_RW(profiling);
758
759static struct attribute *panfrost_attrs[] = {
760 &dev_attr_profiling.attr,
761 NULL,
762};
763
764ATTRIBUTE_GROUPS(panfrost);
765
766/*
767 * The OPP core wants the supply names to be NULL terminated, but we need the
768 * correct num_supplies value for regulator core. Hence, we NULL terminate here
769 * and then initialize num_supplies with ARRAY_SIZE - 1.
770 */
771static const char * const default_supplies[] = { "mali", NULL };
772static const struct panfrost_compatible default_data = {
773 .num_supplies = ARRAY_SIZE(default_supplies) - 1,
774 .supply_names = default_supplies,
775 .num_pm_domains = 1, /* optional */
776 .pm_domain_names = NULL,
777};
778
779static const struct panfrost_compatible allwinner_h616_data = {
780 .num_supplies = ARRAY_SIZE(default_supplies) - 1,
781 .supply_names = default_supplies,
782 .num_pm_domains = 1,
783 .pm_features = BIT(GPU_PM_RT),
784};
785
786static const struct panfrost_compatible amlogic_data = {
787 .num_supplies = ARRAY_SIZE(default_supplies) - 1,
788 .supply_names = default_supplies,
789 .vendor_quirk = panfrost_gpu_amlogic_quirk,
790};
791
792/*
793 * The old data with two power supplies for MT8183 is here only to
794 * keep retro-compatibility with older devicetrees, as DVFS will
795 * not work with this one.
796 *
797 * On new devicetrees please use the _b variant with a single and
798 * coupled regulators instead.
799 */
800static const char * const mediatek_mt8183_supplies[] = { "mali", "sram", NULL };
801static const char * const mediatek_mt8183_pm_domains[] = { "core0", "core1", "core2" };
802static const struct panfrost_compatible mediatek_mt8183_data = {
803 .num_supplies = ARRAY_SIZE(mediatek_mt8183_supplies) - 1,
804 .supply_names = mediatek_mt8183_supplies,
805 .num_pm_domains = ARRAY_SIZE(mediatek_mt8183_pm_domains),
806 .pm_domain_names = mediatek_mt8183_pm_domains,
807};
808
809static const char * const mediatek_mt8183_b_supplies[] = { "mali", NULL };
810static const struct panfrost_compatible mediatek_mt8183_b_data = {
811 .num_supplies = ARRAY_SIZE(mediatek_mt8183_b_supplies) - 1,
812 .supply_names = mediatek_mt8183_b_supplies,
813 .num_pm_domains = ARRAY_SIZE(mediatek_mt8183_pm_domains),
814 .pm_domain_names = mediatek_mt8183_pm_domains,
815 .pm_features = BIT(GPU_PM_CLK_DIS) | BIT(GPU_PM_VREG_OFF),
816};
817
818static const char * const mediatek_mt8186_pm_domains[] = { "core0", "core1" };
819static const struct panfrost_compatible mediatek_mt8186_data = {
820 .num_supplies = ARRAY_SIZE(mediatek_mt8183_b_supplies) - 1,
821 .supply_names = mediatek_mt8183_b_supplies,
822 .num_pm_domains = ARRAY_SIZE(mediatek_mt8186_pm_domains),
823 .pm_domain_names = mediatek_mt8186_pm_domains,
824 .pm_features = BIT(GPU_PM_CLK_DIS) | BIT(GPU_PM_VREG_OFF),
825};
826
827/* MT8188 uses the same power domains and power supplies as MT8183 */
828static const struct panfrost_compatible mediatek_mt8188_data = {
829 .num_supplies = ARRAY_SIZE(mediatek_mt8183_b_supplies) - 1,
830 .supply_names = mediatek_mt8183_b_supplies,
831 .num_pm_domains = ARRAY_SIZE(mediatek_mt8183_pm_domains),
832 .pm_domain_names = mediatek_mt8183_pm_domains,
833 .pm_features = BIT(GPU_PM_CLK_DIS) | BIT(GPU_PM_VREG_OFF),
834 .gpu_quirks = BIT(GPU_QUIRK_FORCE_AARCH64_PGTABLE),
835};
836
837static const char * const mediatek_mt8192_supplies[] = { "mali", NULL };
838static const char * const mediatek_mt8192_pm_domains[] = { "core0", "core1", "core2",
839 "core3", "core4" };
840static const struct panfrost_compatible mediatek_mt8192_data = {
841 .num_supplies = ARRAY_SIZE(mediatek_mt8192_supplies) - 1,
842 .supply_names = mediatek_mt8192_supplies,
843 .num_pm_domains = ARRAY_SIZE(mediatek_mt8192_pm_domains),
844 .pm_domain_names = mediatek_mt8192_pm_domains,
845 .pm_features = BIT(GPU_PM_CLK_DIS) | BIT(GPU_PM_VREG_OFF),
846 .gpu_quirks = BIT(GPU_QUIRK_FORCE_AARCH64_PGTABLE),
847};
848
849static const struct of_device_id dt_match[] = {
850 /* Set first to probe before the generic compatibles */
851 { .compatible = "amlogic,meson-gxm-mali",
852 .data = &amlogic_data, },
853 { .compatible = "amlogic,meson-g12a-mali",
854 .data = &amlogic_data, },
855 { .compatible = "arm,mali-t604", .data = &default_data, },
856 { .compatible = "arm,mali-t624", .data = &default_data, },
857 { .compatible = "arm,mali-t628", .data = &default_data, },
858 { .compatible = "arm,mali-t720", .data = &default_data, },
859 { .compatible = "arm,mali-t760", .data = &default_data, },
860 { .compatible = "arm,mali-t820", .data = &default_data, },
861 { .compatible = "arm,mali-t830", .data = &default_data, },
862 { .compatible = "arm,mali-t860", .data = &default_data, },
863 { .compatible = "arm,mali-t880", .data = &default_data, },
864 { .compatible = "arm,mali-bifrost", .data = &default_data, },
865 { .compatible = "arm,mali-valhall-jm", .data = &default_data, },
866 { .compatible = "mediatek,mt8183-mali", .data = &mediatek_mt8183_data },
867 { .compatible = "mediatek,mt8183b-mali", .data = &mediatek_mt8183_b_data },
868 { .compatible = "mediatek,mt8186-mali", .data = &mediatek_mt8186_data },
869 { .compatible = "mediatek,mt8188-mali", .data = &mediatek_mt8188_data },
870 { .compatible = "mediatek,mt8192-mali", .data = &mediatek_mt8192_data },
871 { .compatible = "allwinner,sun50i-h616-mali", .data = &allwinner_h616_data },
872 {}
873};
874MODULE_DEVICE_TABLE(of, dt_match);
875
876static struct platform_driver panfrost_driver = {
877 .probe = panfrost_probe,
878 .remove = panfrost_remove,
879 .driver = {
880 .name = "panfrost",
881 .pm = pm_ptr(&panfrost_pm_ops),
882 .of_match_table = dt_match,
883 .dev_groups = panfrost_groups,
884 },
885};
886module_platform_driver(panfrost_driver);
887
888MODULE_AUTHOR("Panfrost Project Developers");
889MODULE_DESCRIPTION("Panfrost DRM Driver");
890MODULE_LICENSE("GPL v2");
891MODULE_SOFTDEP("pre: governor_simpleondemand");
892

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source code of linux/drivers/gpu/drm/panfrost/panfrost_drv.c