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 #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
23 static bool unstable_ioctls;
24 module_param_unsafe(unstable_ioctls, bool, 0600);
25
panfrost_ioctl_get_param(struct drm_device * ddev,void * data,struct drm_file * file)26 static 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_ARRAY(TEXTURE_FEATURES, texture_features, 3);
67 PANFROST_FEATURE_ARRAY(JS_FEATURES, js_features, 15);
68 PANFROST_FEATURE(NR_CORE_GROUPS, nr_core_groups);
69 PANFROST_FEATURE(THREAD_TLS_ALLOC, thread_tls_alloc);
70 default:
71 return -EINVAL;
72 }
73
74 return 0;
75 }
76
panfrost_ioctl_create_bo(struct drm_device * dev,void * data,struct drm_file * file)77 static int panfrost_ioctl_create_bo(struct drm_device *dev, void *data,
78 struct drm_file *file)
79 {
80 struct panfrost_file_priv *priv = file->driver_priv;
81 struct panfrost_gem_object *bo;
82 struct drm_panfrost_create_bo *args = data;
83 struct panfrost_gem_mapping *mapping;
84
85 if (!args->size || args->pad ||
86 (args->flags & ~(PANFROST_BO_NOEXEC | PANFROST_BO_HEAP)))
87 return -EINVAL;
88
89 /* Heaps should never be executable */
90 if ((args->flags & PANFROST_BO_HEAP) &&
91 !(args->flags & PANFROST_BO_NOEXEC))
92 return -EINVAL;
93
94 bo = panfrost_gem_create_with_handle(file, dev, args->size, args->flags,
95 &args->handle);
96 if (IS_ERR(bo))
97 return PTR_ERR(bo);
98
99 mapping = panfrost_gem_mapping_get(bo, priv);
100 if (!mapping) {
101 drm_gem_object_put(&bo->base.base);
102 return -EINVAL;
103 }
104
105 args->offset = mapping->mmnode.start << PAGE_SHIFT;
106 panfrost_gem_mapping_put(mapping);
107
108 return 0;
109 }
110
111 /**
112 * panfrost_lookup_bos() - Sets up job->bo[] with the GEM objects
113 * referenced by the job.
114 * @dev: DRM device
115 * @file_priv: DRM file for this fd
116 * @args: IOCTL args
117 * @job: job being set up
118 *
119 * Resolve handles from userspace to BOs and attach them to job.
120 *
121 * Note that this function doesn't need to unreference the BOs on
122 * failure, because that will happen at panfrost_job_cleanup() time.
123 */
124 static int
panfrost_lookup_bos(struct drm_device * dev,struct drm_file * file_priv,struct drm_panfrost_submit * args,struct panfrost_job * job)125 panfrost_lookup_bos(struct drm_device *dev,
126 struct drm_file *file_priv,
127 struct drm_panfrost_submit *args,
128 struct panfrost_job *job)
129 {
130 struct panfrost_file_priv *priv = file_priv->driver_priv;
131 struct panfrost_gem_object *bo;
132 unsigned int i;
133 int ret;
134
135 job->bo_count = args->bo_handle_count;
136
137 if (!job->bo_count)
138 return 0;
139
140 job->implicit_fences = kvmalloc_array(job->bo_count,
141 sizeof(struct dma_fence *),
142 GFP_KERNEL | __GFP_ZERO);
143 if (!job->implicit_fences)
144 return -ENOMEM;
145
146 ret = drm_gem_objects_lookup(file_priv,
147 (void __user *)(uintptr_t)args->bo_handles,
148 job->bo_count, &job->bos);
149 if (ret)
150 return ret;
151
152 job->mappings = kvmalloc_array(job->bo_count,
153 sizeof(struct panfrost_gem_mapping *),
154 GFP_KERNEL | __GFP_ZERO);
155 if (!job->mappings)
156 return -ENOMEM;
157
158 for (i = 0; i < job->bo_count; i++) {
159 struct panfrost_gem_mapping *mapping;
160
161 bo = to_panfrost_bo(job->bos[i]);
162 mapping = panfrost_gem_mapping_get(bo, priv);
163 if (!mapping) {
164 ret = -EINVAL;
165 break;
166 }
167
168 atomic_inc(&bo->gpu_usecount);
169 job->mappings[i] = mapping;
170 }
171
172 return ret;
173 }
174
175 /**
176 * panfrost_copy_in_sync() - Sets up job->in_fences[] with the sync objects
177 * referenced by the job.
178 * @dev: DRM device
179 * @file_priv: DRM file for this fd
180 * @args: IOCTL args
181 * @job: job being set up
182 *
183 * Resolve syncobjs from userspace to fences and attach them to job.
184 *
185 * Note that this function doesn't need to unreference the fences on
186 * failure, because that will happen at panfrost_job_cleanup() time.
187 */
188 static int
panfrost_copy_in_sync(struct drm_device * dev,struct drm_file * file_priv,struct drm_panfrost_submit * args,struct panfrost_job * job)189 panfrost_copy_in_sync(struct drm_device *dev,
190 struct drm_file *file_priv,
191 struct drm_panfrost_submit *args,
192 struct panfrost_job *job)
193 {
194 u32 *handles;
195 int ret = 0;
196 int i;
197
198 job->in_fence_count = args->in_sync_count;
199
200 if (!job->in_fence_count)
201 return 0;
202
203 job->in_fences = kvmalloc_array(job->in_fence_count,
204 sizeof(struct dma_fence *),
205 GFP_KERNEL | __GFP_ZERO);
206 if (!job->in_fences) {
207 DRM_DEBUG("Failed to allocate job in fences\n");
208 return -ENOMEM;
209 }
210
211 handles = kvmalloc_array(job->in_fence_count, sizeof(u32), GFP_KERNEL);
212 if (!handles) {
213 ret = -ENOMEM;
214 DRM_DEBUG("Failed to allocate incoming syncobj handles\n");
215 goto fail;
216 }
217
218 if (copy_from_user(handles,
219 (void __user *)(uintptr_t)args->in_syncs,
220 job->in_fence_count * sizeof(u32))) {
221 ret = -EFAULT;
222 DRM_DEBUG("Failed to copy in syncobj handles\n");
223 goto fail;
224 }
225
226 for (i = 0; i < job->in_fence_count; i++) {
227 ret = drm_syncobj_find_fence(file_priv, handles[i], 0, 0,
228 &job->in_fences[i]);
229 if (ret == -EINVAL)
230 goto fail;
231 }
232
233 fail:
234 kvfree(handles);
235 return ret;
236 }
237
panfrost_ioctl_submit(struct drm_device * dev,void * data,struct drm_file * file)238 static int panfrost_ioctl_submit(struct drm_device *dev, void *data,
239 struct drm_file *file)
240 {
241 struct panfrost_device *pfdev = dev->dev_private;
242 struct drm_panfrost_submit *args = data;
243 struct drm_syncobj *sync_out = NULL;
244 struct panfrost_job *job;
245 int ret = 0;
246
247 if (!args->jc)
248 return -EINVAL;
249
250 if (args->requirements && args->requirements != PANFROST_JD_REQ_FS)
251 return -EINVAL;
252
253 if (args->out_sync > 0) {
254 sync_out = drm_syncobj_find(file, args->out_sync);
255 if (!sync_out)
256 return -ENODEV;
257 }
258
259 job = kzalloc(sizeof(*job), GFP_KERNEL);
260 if (!job) {
261 ret = -ENOMEM;
262 goto fail_out_sync;
263 }
264
265 kref_init(&job->refcount);
266
267 job->pfdev = pfdev;
268 job->jc = args->jc;
269 job->requirements = args->requirements;
270 job->flush_id = panfrost_gpu_get_latest_flush_id(pfdev);
271 job->file_priv = file->driver_priv;
272
273 ret = panfrost_copy_in_sync(dev, file, args, job);
274 if (ret)
275 goto fail_job;
276
277 ret = panfrost_lookup_bos(dev, file, args, job);
278 if (ret)
279 goto fail_job;
280
281 ret = panfrost_job_push(job);
282 if (ret)
283 goto fail_job;
284
285 /* Update the return sync object for the job */
286 if (sync_out)
287 drm_syncobj_replace_fence(sync_out, job->render_done_fence);
288
289 fail_job:
290 panfrost_job_put(job);
291 fail_out_sync:
292 if (sync_out)
293 drm_syncobj_put(sync_out);
294
295 return ret;
296 }
297
298 static int
panfrost_ioctl_wait_bo(struct drm_device * dev,void * data,struct drm_file * file_priv)299 panfrost_ioctl_wait_bo(struct drm_device *dev, void *data,
300 struct drm_file *file_priv)
301 {
302 long ret;
303 struct drm_panfrost_wait_bo *args = data;
304 struct drm_gem_object *gem_obj;
305 unsigned long timeout = drm_timeout_abs_to_jiffies(args->timeout_ns);
306
307 if (args->pad)
308 return -EINVAL;
309
310 gem_obj = drm_gem_object_lookup(file_priv, args->handle);
311 if (!gem_obj)
312 return -ENOENT;
313
314 ret = dma_resv_wait_timeout_rcu(gem_obj->resv, true,
315 true, timeout);
316 if (!ret)
317 ret = timeout ? -ETIMEDOUT : -EBUSY;
318
319 drm_gem_object_put(gem_obj);
320
321 return ret;
322 }
323
panfrost_ioctl_mmap_bo(struct drm_device * dev,void * data,struct drm_file * file_priv)324 static int panfrost_ioctl_mmap_bo(struct drm_device *dev, void *data,
325 struct drm_file *file_priv)
326 {
327 struct drm_panfrost_mmap_bo *args = data;
328 struct drm_gem_object *gem_obj;
329 int ret;
330
331 if (args->flags != 0) {
332 DRM_INFO("unknown mmap_bo flags: %d\n", args->flags);
333 return -EINVAL;
334 }
335
336 gem_obj = drm_gem_object_lookup(file_priv, args->handle);
337 if (!gem_obj) {
338 DRM_DEBUG("Failed to look up GEM BO %d\n", args->handle);
339 return -ENOENT;
340 }
341
342 /* Don't allow mmapping of heap objects as pages are not pinned. */
343 if (to_panfrost_bo(gem_obj)->is_heap) {
344 ret = -EINVAL;
345 goto out;
346 }
347
348 ret = drm_gem_create_mmap_offset(gem_obj);
349 if (ret == 0)
350 args->offset = drm_vma_node_offset_addr(&gem_obj->vma_node);
351
352 out:
353 drm_gem_object_put(gem_obj);
354 return ret;
355 }
356
panfrost_ioctl_get_bo_offset(struct drm_device * dev,void * data,struct drm_file * file_priv)357 static int panfrost_ioctl_get_bo_offset(struct drm_device *dev, void *data,
358 struct drm_file *file_priv)
359 {
360 struct panfrost_file_priv *priv = file_priv->driver_priv;
361 struct drm_panfrost_get_bo_offset *args = data;
362 struct panfrost_gem_mapping *mapping;
363 struct drm_gem_object *gem_obj;
364 struct panfrost_gem_object *bo;
365
366 gem_obj = drm_gem_object_lookup(file_priv, args->handle);
367 if (!gem_obj) {
368 DRM_DEBUG("Failed to look up GEM BO %d\n", args->handle);
369 return -ENOENT;
370 }
371 bo = to_panfrost_bo(gem_obj);
372
373 mapping = panfrost_gem_mapping_get(bo, priv);
374 drm_gem_object_put(gem_obj);
375
376 if (!mapping)
377 return -EINVAL;
378
379 args->offset = mapping->mmnode.start << PAGE_SHIFT;
380 panfrost_gem_mapping_put(mapping);
381 return 0;
382 }
383
panfrost_ioctl_madvise(struct drm_device * dev,void * data,struct drm_file * file_priv)384 static int panfrost_ioctl_madvise(struct drm_device *dev, void *data,
385 struct drm_file *file_priv)
386 {
387 struct panfrost_file_priv *priv = file_priv->driver_priv;
388 struct drm_panfrost_madvise *args = data;
389 struct panfrost_device *pfdev = dev->dev_private;
390 struct drm_gem_object *gem_obj;
391 struct panfrost_gem_object *bo;
392 int ret = 0;
393
394 gem_obj = drm_gem_object_lookup(file_priv, args->handle);
395 if (!gem_obj) {
396 DRM_DEBUG("Failed to look up GEM BO %d\n", args->handle);
397 return -ENOENT;
398 }
399
400 bo = to_panfrost_bo(gem_obj);
401
402 mutex_lock(&pfdev->shrinker_lock);
403 mutex_lock(&bo->mappings.lock);
404 if (args->madv == PANFROST_MADV_DONTNEED) {
405 struct panfrost_gem_mapping *first;
406
407 first = list_first_entry(&bo->mappings.list,
408 struct panfrost_gem_mapping,
409 node);
410
411 /*
412 * If we want to mark the BO purgeable, there must be only one
413 * user: the caller FD.
414 * We could do something smarter and mark the BO purgeable only
415 * when all its users have marked it purgeable, but globally
416 * visible/shared BOs are likely to never be marked purgeable
417 * anyway, so let's not bother.
418 */
419 if (!list_is_singular(&bo->mappings.list) ||
420 WARN_ON_ONCE(first->mmu != &priv->mmu)) {
421 ret = -EINVAL;
422 goto out_unlock_mappings;
423 }
424 }
425
426 args->retained = drm_gem_shmem_madvise(gem_obj, args->madv);
427
428 if (args->retained) {
429 if (args->madv == PANFROST_MADV_DONTNEED)
430 list_add_tail(&bo->base.madv_list,
431 &pfdev->shrinker_list);
432 else if (args->madv == PANFROST_MADV_WILLNEED)
433 list_del_init(&bo->base.madv_list);
434 }
435
436 out_unlock_mappings:
437 mutex_unlock(&bo->mappings.lock);
438 mutex_unlock(&pfdev->shrinker_lock);
439
440 drm_gem_object_put(gem_obj);
441 return ret;
442 }
443
panfrost_unstable_ioctl_check(void)444 int panfrost_unstable_ioctl_check(void)
445 {
446 if (!unstable_ioctls)
447 return -ENOSYS;
448
449 return 0;
450 }
451
452 #define PFN_4G (SZ_4G >> PAGE_SHIFT)
453 #define PFN_4G_MASK (PFN_4G - 1)
454 #define PFN_16M (SZ_16M >> PAGE_SHIFT)
455
panfrost_drm_mm_color_adjust(const struct drm_mm_node * node,unsigned long color,u64 * start,u64 * end)456 static void panfrost_drm_mm_color_adjust(const struct drm_mm_node *node,
457 unsigned long color,
458 u64 *start, u64 *end)
459 {
460 /* Executable buffers can't start or end on a 4GB boundary */
461 if (!(color & PANFROST_BO_NOEXEC)) {
462 u64 next_seg;
463
464 if ((*start & PFN_4G_MASK) == 0)
465 (*start)++;
466
467 if ((*end & PFN_4G_MASK) == 0)
468 (*end)--;
469
470 next_seg = ALIGN(*start, PFN_4G);
471 if (next_seg - *start <= PFN_16M)
472 *start = next_seg + 1;
473
474 *end = min(*end, ALIGN(*start, PFN_4G) - 1);
475 }
476 }
477
478 static int
panfrost_open(struct drm_device * dev,struct drm_file * file)479 panfrost_open(struct drm_device *dev, struct drm_file *file)
480 {
481 int ret;
482 struct panfrost_device *pfdev = dev->dev_private;
483 struct panfrost_file_priv *panfrost_priv;
484
485 panfrost_priv = kzalloc(sizeof(*panfrost_priv), GFP_KERNEL);
486 if (!panfrost_priv)
487 return -ENOMEM;
488
489 panfrost_priv->pfdev = pfdev;
490 file->driver_priv = panfrost_priv;
491
492 spin_lock_init(&panfrost_priv->mm_lock);
493
494 /* 4G enough for now. can be 48-bit */
495 drm_mm_init(&panfrost_priv->mm, SZ_32M >> PAGE_SHIFT, (SZ_4G - SZ_32M) >> PAGE_SHIFT);
496 panfrost_priv->mm.color_adjust = panfrost_drm_mm_color_adjust;
497
498 ret = panfrost_mmu_pgtable_alloc(panfrost_priv);
499 if (ret)
500 goto err_pgtable;
501
502 ret = panfrost_job_open(panfrost_priv);
503 if (ret)
504 goto err_job;
505
506 return 0;
507
508 err_job:
509 panfrost_mmu_pgtable_free(panfrost_priv);
510 err_pgtable:
511 drm_mm_takedown(&panfrost_priv->mm);
512 kfree(panfrost_priv);
513 return ret;
514 }
515
516 static void
panfrost_postclose(struct drm_device * dev,struct drm_file * file)517 panfrost_postclose(struct drm_device *dev, struct drm_file *file)
518 {
519 struct panfrost_file_priv *panfrost_priv = file->driver_priv;
520
521 panfrost_perfcnt_close(file);
522 panfrost_job_close(panfrost_priv);
523
524 panfrost_mmu_pgtable_free(panfrost_priv);
525 drm_mm_takedown(&panfrost_priv->mm);
526 kfree(panfrost_priv);
527 }
528
529 static const struct drm_ioctl_desc panfrost_drm_driver_ioctls[] = {
530 #define PANFROST_IOCTL(n, func, flags) \
531 DRM_IOCTL_DEF_DRV(PANFROST_##n, panfrost_ioctl_##func, flags)
532
533 PANFROST_IOCTL(SUBMIT, submit, DRM_RENDER_ALLOW),
534 PANFROST_IOCTL(WAIT_BO, wait_bo, DRM_RENDER_ALLOW),
535 PANFROST_IOCTL(CREATE_BO, create_bo, DRM_RENDER_ALLOW),
536 PANFROST_IOCTL(MMAP_BO, mmap_bo, DRM_RENDER_ALLOW),
537 PANFROST_IOCTL(GET_PARAM, get_param, DRM_RENDER_ALLOW),
538 PANFROST_IOCTL(GET_BO_OFFSET, get_bo_offset, DRM_RENDER_ALLOW),
539 PANFROST_IOCTL(PERFCNT_ENABLE, perfcnt_enable, DRM_RENDER_ALLOW),
540 PANFROST_IOCTL(PERFCNT_DUMP, perfcnt_dump, DRM_RENDER_ALLOW),
541 PANFROST_IOCTL(MADVISE, madvise, DRM_RENDER_ALLOW),
542 };
543
544 DEFINE_DRM_GEM_FOPS(panfrost_drm_driver_fops);
545
546 /*
547 * Panfrost driver version:
548 * - 1.0 - initial interface
549 * - 1.1 - adds HEAP and NOEXEC flags for CREATE_BO
550 */
551 static struct drm_driver panfrost_drm_driver = {
552 .driver_features = DRIVER_RENDER | DRIVER_GEM | DRIVER_SYNCOBJ,
553 .open = panfrost_open,
554 .postclose = panfrost_postclose,
555 .ioctls = panfrost_drm_driver_ioctls,
556 .num_ioctls = ARRAY_SIZE(panfrost_drm_driver_ioctls),
557 .fops = &panfrost_drm_driver_fops,
558 .name = "panfrost",
559 .desc = "panfrost DRM",
560 .date = "20180908",
561 .major = 1,
562 .minor = 1,
563
564 .gem_create_object = panfrost_gem_create_object,
565 .prime_handle_to_fd = drm_gem_prime_handle_to_fd,
566 .prime_fd_to_handle = drm_gem_prime_fd_to_handle,
567 .gem_prime_import_sg_table = panfrost_gem_prime_import_sg_table,
568 .gem_prime_mmap = drm_gem_prime_mmap,
569 };
570
panfrost_probe(struct platform_device * pdev)571 static int panfrost_probe(struct platform_device *pdev)
572 {
573 struct panfrost_device *pfdev;
574 struct drm_device *ddev;
575 int err;
576
577 pfdev = devm_kzalloc(&pdev->dev, sizeof(*pfdev), GFP_KERNEL);
578 if (!pfdev)
579 return -ENOMEM;
580
581 pfdev->pdev = pdev;
582 pfdev->dev = &pdev->dev;
583
584 platform_set_drvdata(pdev, pfdev);
585
586 pfdev->comp = of_device_get_match_data(&pdev->dev);
587 if (!pfdev->comp)
588 return -ENODEV;
589
590 /* Allocate and initialze the DRM device. */
591 ddev = drm_dev_alloc(&panfrost_drm_driver, &pdev->dev);
592 if (IS_ERR(ddev))
593 return PTR_ERR(ddev);
594
595 ddev->dev_private = pfdev;
596 pfdev->ddev = ddev;
597
598 mutex_init(&pfdev->shrinker_lock);
599 INIT_LIST_HEAD(&pfdev->shrinker_list);
600
601 err = panfrost_device_init(pfdev);
602 if (err) {
603 if (err != -EPROBE_DEFER)
604 dev_err(&pdev->dev, "Fatal error during GPU init\n");
605 goto err_out0;
606 }
607
608 pm_runtime_set_active(pfdev->dev);
609 pm_runtime_mark_last_busy(pfdev->dev);
610 pm_runtime_enable(pfdev->dev);
611 pm_runtime_set_autosuspend_delay(pfdev->dev, 50); /* ~3 frames */
612 pm_runtime_use_autosuspend(pfdev->dev);
613
614 /*
615 * Register the DRM device with the core and the connectors with
616 * sysfs
617 */
618 err = drm_dev_register(ddev, 0);
619 if (err < 0)
620 goto err_out1;
621
622 panfrost_gem_shrinker_init(ddev);
623
624 return 0;
625
626 err_out1:
627 pm_runtime_disable(pfdev->dev);
628 panfrost_device_fini(pfdev);
629 pm_runtime_set_suspended(pfdev->dev);
630 err_out0:
631 drm_dev_put(ddev);
632 return err;
633 }
634
panfrost_remove(struct platform_device * pdev)635 static int panfrost_remove(struct platform_device *pdev)
636 {
637 struct panfrost_device *pfdev = platform_get_drvdata(pdev);
638 struct drm_device *ddev = pfdev->ddev;
639
640 drm_dev_unregister(ddev);
641 panfrost_gem_shrinker_cleanup(ddev);
642
643 pm_runtime_get_sync(pfdev->dev);
644 pm_runtime_disable(pfdev->dev);
645 panfrost_device_fini(pfdev);
646 pm_runtime_set_suspended(pfdev->dev);
647
648 drm_dev_put(ddev);
649 return 0;
650 }
651
652 static const char * const default_supplies[] = { "mali" };
653 static const struct panfrost_compatible default_data = {
654 .num_supplies = ARRAY_SIZE(default_supplies),
655 .supply_names = default_supplies,
656 .num_pm_domains = 1, /* optional */
657 .pm_domain_names = NULL,
658 };
659
660 static const struct panfrost_compatible amlogic_data = {
661 .num_supplies = ARRAY_SIZE(default_supplies),
662 .supply_names = default_supplies,
663 .vendor_quirk = panfrost_gpu_amlogic_quirk,
664 };
665
666 static const struct of_device_id dt_match[] = {
667 /* Set first to probe before the generic compatibles */
668 { .compatible = "amlogic,meson-gxm-mali",
669 .data = &amlogic_data, },
670 { .compatible = "amlogic,meson-g12a-mali",
671 .data = &amlogic_data, },
672 { .compatible = "arm,mali-t604", .data = &default_data, },
673 { .compatible = "arm,mali-t624", .data = &default_data, },
674 { .compatible = "arm,mali-t628", .data = &default_data, },
675 { .compatible = "arm,mali-t720", .data = &default_data, },
676 { .compatible = "arm,mali-t760", .data = &default_data, },
677 { .compatible = "arm,mali-t820", .data = &default_data, },
678 { .compatible = "arm,mali-t830", .data = &default_data, },
679 { .compatible = "arm,mali-t860", .data = &default_data, },
680 { .compatible = "arm,mali-t880", .data = &default_data, },
681 { .compatible = "arm,mali-bifrost", .data = &default_data, },
682 {}
683 };
684 MODULE_DEVICE_TABLE(of, dt_match);
685
686 static const struct dev_pm_ops panfrost_pm_ops = {
687 SET_SYSTEM_SLEEP_PM_OPS(pm_runtime_force_suspend, pm_runtime_force_resume)
688 SET_RUNTIME_PM_OPS(panfrost_device_suspend, panfrost_device_resume, NULL)
689 };
690
691 static struct platform_driver panfrost_driver = {
692 .probe = panfrost_probe,
693 .remove = panfrost_remove,
694 .driver = {
695 .name = "panfrost",
696 .pm = &panfrost_pm_ops,
697 .of_match_table = dt_match,
698 },
699 };
700 module_platform_driver(panfrost_driver);
701
702 MODULE_AUTHOR("Panfrost Project Developers");
703 MODULE_DESCRIPTION("Panfrost DRM Driver");
704 MODULE_LICENSE("GPL v2");
705
