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.h>
8 #include <linux/pagemap.h>
9 #include <linux/platform_device.h>
10 #include <linux/pm_runtime.h>
11 #include <drm/panfrost_drm.h>
12 #include <drm/drm_drv.h>
13 #include <drm/drm_ioctl.h>
14 #include <drm/drm_syncobj.h>
15 #include <drm/drm_utils.h>
16
17 #include "panfrost_device.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
24 static bool unstable_ioctls;
25 module_param_unsafe(unstable_ioctls, bool, 0600);
26
panfrost_ioctl_get_param(struct drm_device * ddev,void * data,struct drm_file * file)27 static 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(AFBC_FEATURES, afbc_features);
68 PANFROST_FEATURE_ARRAY(TEXTURE_FEATURES, texture_features, 3);
69 PANFROST_FEATURE_ARRAY(JS_FEATURES, js_features, 15);
70 PANFROST_FEATURE(NR_CORE_GROUPS, nr_core_groups);
71 PANFROST_FEATURE(THREAD_TLS_ALLOC, thread_tls_alloc);
72 default:
73 return -EINVAL;
74 }
75
76 return 0;
77 }
78
panfrost_ioctl_create_bo(struct drm_device * dev,void * data,struct drm_file * file)79 static int panfrost_ioctl_create_bo(struct drm_device *dev, void *data,
80 struct drm_file *file)
81 {
82 struct panfrost_file_priv *priv = file->driver_priv;
83 struct panfrost_gem_object *bo;
84 struct drm_panfrost_create_bo *args = data;
85 struct panfrost_gem_mapping *mapping;
86 int ret;
87
88 if (!args->size || args->pad ||
89 (args->flags & ~(PANFROST_BO_NOEXEC | PANFROST_BO_HEAP)))
90 return -EINVAL;
91
92 /* Heaps should never be executable */
93 if ((args->flags & PANFROST_BO_HEAP) &&
94 !(args->flags & PANFROST_BO_NOEXEC))
95 return -EINVAL;
96
97 bo = panfrost_gem_create(dev, args->size, args->flags);
98 if (IS_ERR(bo))
99 return PTR_ERR(bo);
100
101 ret = drm_gem_handle_create(file, &bo->base.base, &args->handle);
102 if (ret)
103 goto out;
104
105 mapping = panfrost_gem_mapping_get(bo, priv);
106 if (mapping) {
107 args->offset = mapping->mmnode.start << PAGE_SHIFT;
108 panfrost_gem_mapping_put(mapping);
109 } else {
110 /* This can only happen if the handle from
111 * drm_gem_handle_create() has already been guessed and freed
112 * by user space
113 */
114 ret = -EINVAL;
115 }
116
117 out:
118 drm_gem_object_put(&bo->base.base);
119 return ret;
120 }
121
122 /**
123 * panfrost_lookup_bos() - Sets up job->bo[] with the GEM objects
124 * referenced by the job.
125 * @dev: DRM device
126 * @file_priv: DRM file for this fd
127 * @args: IOCTL args
128 * @job: job being set up
129 *
130 * Resolve handles from userspace to BOs and attach them to job.
131 *
132 * Note that this function doesn't need to unreference the BOs on
133 * failure, because that will happen at panfrost_job_cleanup() time.
134 */
135 static int
panfrost_lookup_bos(struct drm_device * dev,struct drm_file * file_priv,struct drm_panfrost_submit * args,struct panfrost_job * job)136 panfrost_lookup_bos(struct drm_device *dev,
137 struct drm_file *file_priv,
138 struct drm_panfrost_submit *args,
139 struct panfrost_job *job)
140 {
141 struct panfrost_file_priv *priv = file_priv->driver_priv;
142 struct panfrost_gem_object *bo;
143 unsigned int i;
144 int ret;
145
146 job->bo_count = args->bo_handle_count;
147
148 if (!job->bo_count)
149 return 0;
150
151 ret = drm_gem_objects_lookup(file_priv,
152 (void __user *)(uintptr_t)args->bo_handles,
153 job->bo_count, &job->bos);
154 if (ret)
155 return ret;
156
157 job->mappings = kvmalloc_array(job->bo_count,
158 sizeof(struct panfrost_gem_mapping *),
159 GFP_KERNEL | __GFP_ZERO);
160 if (!job->mappings)
161 return -ENOMEM;
162
163 for (i = 0; i < job->bo_count; i++) {
164 struct panfrost_gem_mapping *mapping;
165
166 bo = to_panfrost_bo(job->bos[i]);
167 mapping = panfrost_gem_mapping_get(bo, priv);
168 if (!mapping) {
169 ret = -EINVAL;
170 break;
171 }
172
173 atomic_inc(&bo->gpu_usecount);
174 job->mappings[i] = mapping;
175 }
176
177 return ret;
178 }
179
180 /**
181 * panfrost_copy_in_sync() - Sets up job->deps with the sync objects
182 * referenced by the job.
183 * @dev: DRM device
184 * @file_priv: DRM file for this fd
185 * @args: IOCTL args
186 * @job: job being set up
187 *
188 * Resolve syncobjs from userspace to fences and attach them to job.
189 *
190 * Note that this function doesn't need to unreference the fences on
191 * failure, because that will happen at panfrost_job_cleanup() time.
192 */
193 static int
panfrost_copy_in_sync(struct drm_device * dev,struct drm_file * file_priv,struct drm_panfrost_submit * args,struct panfrost_job * job)194 panfrost_copy_in_sync(struct drm_device *dev,
195 struct drm_file *file_priv,
196 struct drm_panfrost_submit *args,
197 struct panfrost_job *job)
198 {
199 u32 *handles;
200 int ret = 0;
201 int i, in_fence_count;
202
203 in_fence_count = args->in_sync_count;
204
205 if (!in_fence_count)
206 return 0;
207
208 handles = kvmalloc_array(in_fence_count, sizeof(u32), GFP_KERNEL);
209 if (!handles) {
210 ret = -ENOMEM;
211 DRM_DEBUG("Failed to allocate incoming syncobj handles\n");
212 goto fail;
213 }
214
215 if (copy_from_user(handles,
216 (void __user *)(uintptr_t)args->in_syncs,
217 in_fence_count * sizeof(u32))) {
218 ret = -EFAULT;
219 DRM_DEBUG("Failed to copy in syncobj handles\n");
220 goto fail;
221 }
222
223 for (i = 0; i < in_fence_count; i++) {
224 ret = drm_sched_job_add_syncobj_dependency(&job->base, file_priv,
225 handles[i], 0);
226 if (ret)
227 goto fail;
228 }
229
230 fail:
231 kvfree(handles);
232 return ret;
233 }
234
panfrost_ioctl_submit(struct drm_device * dev,void * data,struct drm_file * file)235 static int panfrost_ioctl_submit(struct drm_device *dev, void *data,
236 struct drm_file *file)
237 {
238 struct panfrost_device *pfdev = dev->dev_private;
239 struct panfrost_file_priv *file_priv = file->driver_priv;
240 struct drm_panfrost_submit *args = data;
241 struct drm_syncobj *sync_out = NULL;
242 struct panfrost_job *job;
243 int ret = 0, slot;
244
245 if (!args->jc)
246 return -EINVAL;
247
248 if (args->requirements && args->requirements != PANFROST_JD_REQ_FS)
249 return -EINVAL;
250
251 if (args->out_sync > 0) {
252 sync_out = drm_syncobj_find(file, args->out_sync);
253 if (!sync_out)
254 return -ENODEV;
255 }
256
257 job = kzalloc(sizeof(*job), GFP_KERNEL);
258 if (!job) {
259 ret = -ENOMEM;
260 goto out_put_syncout;
261 }
262
263 kref_init(&job->refcount);
264
265 job->pfdev = pfdev;
266 job->jc = args->jc;
267 job->requirements = args->requirements;
268 job->flush_id = panfrost_gpu_get_latest_flush_id(pfdev);
269 job->mmu = file_priv->mmu;
270 job->engine_usage = &file_priv->engine_usage;
271
272 slot = panfrost_job_get_slot(job);
273
274 ret = drm_sched_job_init(&job->base,
275 &file_priv->sched_entity[slot],
276 1, NULL);
277 if (ret)
278 goto out_put_job;
279
280 ret = panfrost_copy_in_sync(dev, file, args, job);
281 if (ret)
282 goto out_cleanup_job;
283
284 ret = panfrost_lookup_bos(dev, file, args, job);
285 if (ret)
286 goto out_cleanup_job;
287
288 ret = panfrost_job_push(job);
289 if (ret)
290 goto out_cleanup_job;
291
292 /* Update the return sync object for the job */
293 if (sync_out)
294 drm_syncobj_replace_fence(sync_out, job->render_done_fence);
295
296 out_cleanup_job:
297 if (ret)
298 drm_sched_job_cleanup(&job->base);
299 out_put_job:
300 panfrost_job_put(job);
301 out_put_syncout:
302 if (sync_out)
303 drm_syncobj_put(sync_out);
304
305 return ret;
306 }
307
308 static int
panfrost_ioctl_wait_bo(struct drm_device * dev,void * data,struct drm_file * file_priv)309 panfrost_ioctl_wait_bo(struct drm_device *dev, void *data,
310 struct drm_file *file_priv)
311 {
312 long ret;
313 struct drm_panfrost_wait_bo *args = data;
314 struct drm_gem_object *gem_obj;
315 unsigned long timeout = drm_timeout_abs_to_jiffies(args->timeout_ns);
316
317 if (args->pad)
318 return -EINVAL;
319
320 gem_obj = drm_gem_object_lookup(file_priv, args->handle);
321 if (!gem_obj)
322 return -ENOENT;
323
324 ret = dma_resv_wait_timeout(gem_obj->resv, DMA_RESV_USAGE_READ,
325 true, timeout);
326 if (!ret)
327 ret = timeout ? -ETIMEDOUT : -EBUSY;
328
329 drm_gem_object_put(gem_obj);
330
331 return ret;
332 }
333
panfrost_ioctl_mmap_bo(struct drm_device * dev,void * data,struct drm_file * file_priv)334 static int panfrost_ioctl_mmap_bo(struct drm_device *dev, void *data,
335 struct drm_file *file_priv)
336 {
337 struct drm_panfrost_mmap_bo *args = data;
338 struct drm_gem_object *gem_obj;
339 int ret;
340
341 if (args->flags != 0) {
342 DRM_INFO("unknown mmap_bo flags: %d\n", args->flags);
343 return -EINVAL;
344 }
345
346 gem_obj = drm_gem_object_lookup(file_priv, args->handle);
347 if (!gem_obj) {
348 DRM_DEBUG("Failed to look up GEM BO %d\n", args->handle);
349 return -ENOENT;
350 }
351
352 /* Don't allow mmapping of heap objects as pages are not pinned. */
353 if (to_panfrost_bo(gem_obj)->is_heap) {
354 ret = -EINVAL;
355 goto out;
356 }
357
358 ret = drm_gem_create_mmap_offset(gem_obj);
359 if (ret == 0)
360 args->offset = drm_vma_node_offset_addr(&gem_obj->vma_node);
361
362 out:
363 drm_gem_object_put(gem_obj);
364 return ret;
365 }
366
panfrost_ioctl_get_bo_offset(struct drm_device * dev,void * data,struct drm_file * file_priv)367 static int panfrost_ioctl_get_bo_offset(struct drm_device *dev, void *data,
368 struct drm_file *file_priv)
369 {
370 struct panfrost_file_priv *priv = file_priv->driver_priv;
371 struct drm_panfrost_get_bo_offset *args = data;
372 struct panfrost_gem_mapping *mapping;
373 struct drm_gem_object *gem_obj;
374 struct panfrost_gem_object *bo;
375
376 gem_obj = drm_gem_object_lookup(file_priv, args->handle);
377 if (!gem_obj) {
378 DRM_DEBUG("Failed to look up GEM BO %d\n", args->handle);
379 return -ENOENT;
380 }
381 bo = to_panfrost_bo(gem_obj);
382
383 mapping = panfrost_gem_mapping_get(bo, priv);
384 drm_gem_object_put(gem_obj);
385
386 if (!mapping)
387 return -EINVAL;
388
389 args->offset = mapping->mmnode.start << PAGE_SHIFT;
390 panfrost_gem_mapping_put(mapping);
391 return 0;
392 }
393
panfrost_ioctl_madvise(struct drm_device * dev,void * data,struct drm_file * file_priv)394 static int panfrost_ioctl_madvise(struct drm_device *dev, void *data,
395 struct drm_file *file_priv)
396 {
397 struct panfrost_file_priv *priv = file_priv->driver_priv;
398 struct drm_panfrost_madvise *args = data;
399 struct panfrost_device *pfdev = dev->dev_private;
400 struct drm_gem_object *gem_obj;
401 struct panfrost_gem_object *bo;
402 int ret = 0;
403
404 gem_obj = drm_gem_object_lookup(file_priv, args->handle);
405 if (!gem_obj) {
406 DRM_DEBUG("Failed to look up GEM BO %d\n", args->handle);
407 return -ENOENT;
408 }
409
410 bo = to_panfrost_bo(gem_obj);
411
412 ret = dma_resv_lock_interruptible(bo->base.base.resv, NULL);
413 if (ret)
414 goto out_put_object;
415
416 mutex_lock(&pfdev->shrinker_lock);
417 mutex_lock(&bo->mappings.lock);
418 if (args->madv == PANFROST_MADV_DONTNEED) {
419 struct panfrost_gem_mapping *first;
420
421 first = list_first_entry(&bo->mappings.list,
422 struct panfrost_gem_mapping,
423 node);
424
425 /*
426 * If we want to mark the BO purgeable, there must be only one
427 * user: the caller FD.
428 * We could do something smarter and mark the BO purgeable only
429 * when all its users have marked it purgeable, but globally
430 * visible/shared BOs are likely to never be marked purgeable
431 * anyway, so let's not bother.
432 */
433 if (!list_is_singular(&bo->mappings.list) ||
434 WARN_ON_ONCE(first->mmu != priv->mmu)) {
435 ret = -EINVAL;
436 goto out_unlock_mappings;
437 }
438 }
439
440 args->retained = drm_gem_shmem_madvise(&bo->base, args->madv);
441
442 if (args->retained) {
443 if (args->madv == PANFROST_MADV_DONTNEED)
444 list_move_tail(&bo->base.madv_list,
445 &pfdev->shrinker_list);
446 else if (args->madv == PANFROST_MADV_WILLNEED)
447 list_del_init(&bo->base.madv_list);
448 }
449
450 out_unlock_mappings:
451 mutex_unlock(&bo->mappings.lock);
452 mutex_unlock(&pfdev->shrinker_lock);
453 dma_resv_unlock(bo->base.base.resv);
454 out_put_object:
455 drm_gem_object_put(gem_obj);
456 return ret;
457 }
458
panfrost_unstable_ioctl_check(void)459 int panfrost_unstable_ioctl_check(void)
460 {
461 if (!unstable_ioctls)
462 return -ENOSYS;
463
464 return 0;
465 }
466
467 static int
panfrost_open(struct drm_device * dev,struct drm_file * file)468 panfrost_open(struct drm_device *dev, struct drm_file *file)
469 {
470 int ret;
471 struct panfrost_device *pfdev = dev->dev_private;
472 struct panfrost_file_priv *panfrost_priv;
473
474 panfrost_priv = kzalloc(sizeof(*panfrost_priv), GFP_KERNEL);
475 if (!panfrost_priv)
476 return -ENOMEM;
477
478 panfrost_priv->pfdev = pfdev;
479 file->driver_priv = panfrost_priv;
480
481 panfrost_priv->mmu = panfrost_mmu_ctx_create(pfdev);
482 if (IS_ERR(panfrost_priv->mmu)) {
483 ret = PTR_ERR(panfrost_priv->mmu);
484 goto err_free;
485 }
486
487 ret = panfrost_job_open(panfrost_priv);
488 if (ret)
489 goto err_job;
490
491 return 0;
492
493 err_job:
494 panfrost_mmu_ctx_put(panfrost_priv->mmu);
495 err_free:
496 kfree(panfrost_priv);
497 return ret;
498 }
499
500 static void
panfrost_postclose(struct drm_device * dev,struct drm_file * file)501 panfrost_postclose(struct drm_device *dev, struct drm_file *file)
502 {
503 struct panfrost_file_priv *panfrost_priv = file->driver_priv;
504
505 panfrost_perfcnt_close(file);
506 panfrost_job_close(panfrost_priv);
507
508 panfrost_mmu_ctx_put(panfrost_priv->mmu);
509 kfree(panfrost_priv);
510 }
511
512 static const struct drm_ioctl_desc panfrost_drm_driver_ioctls[] = {
513 #define PANFROST_IOCTL(n, func, flags) \
514 DRM_IOCTL_DEF_DRV(PANFROST_##n, panfrost_ioctl_##func, flags)
515
516 PANFROST_IOCTL(SUBMIT, submit, DRM_RENDER_ALLOW),
517 PANFROST_IOCTL(WAIT_BO, wait_bo, DRM_RENDER_ALLOW),
518 PANFROST_IOCTL(CREATE_BO, create_bo, DRM_RENDER_ALLOW),
519 PANFROST_IOCTL(MMAP_BO, mmap_bo, DRM_RENDER_ALLOW),
520 PANFROST_IOCTL(GET_PARAM, get_param, DRM_RENDER_ALLOW),
521 PANFROST_IOCTL(GET_BO_OFFSET, get_bo_offset, DRM_RENDER_ALLOW),
522 PANFROST_IOCTL(PERFCNT_ENABLE, perfcnt_enable, DRM_RENDER_ALLOW),
523 PANFROST_IOCTL(PERFCNT_DUMP, perfcnt_dump, DRM_RENDER_ALLOW),
524 PANFROST_IOCTL(MADVISE, madvise, DRM_RENDER_ALLOW),
525 };
526
panfrost_gpu_show_fdinfo(struct panfrost_device * pfdev,struct panfrost_file_priv * panfrost_priv,struct drm_printer * p)527 static void panfrost_gpu_show_fdinfo(struct panfrost_device *pfdev,
528 struct panfrost_file_priv *panfrost_priv,
529 struct drm_printer *p)
530 {
531 int i;
532
533 /*
534 * IMPORTANT NOTE: drm-cycles and drm-engine measurements are not
535 * accurate, as they only provide a rough estimation of the number of
536 * GPU cycles and CPU time spent in a given context. This is due to two
537 * different factors:
538 * - Firstly, we must consider the time the CPU and then the kernel
539 * takes to process the GPU interrupt, which means additional time and
540 * GPU cycles will be added in excess to the real figure.
541 * - Secondly, the pipelining done by the Job Manager (2 job slots per
542 * engine) implies there is no way to know exactly how much time each
543 * job spent on the GPU.
544 */
545
546 static const char * const engine_names[] = {
547 "fragment", "vertex-tiler", "compute-only"
548 };
549
550 BUILD_BUG_ON(ARRAY_SIZE(engine_names) != NUM_JOB_SLOTS);
551
552 for (i = 0; i < NUM_JOB_SLOTS - 1; i++) {
553 if (pfdev->profile_mode) {
554 drm_printf(p, "drm-engine-%s:\t%llu ns\n",
555 engine_names[i], panfrost_priv->engine_usage.elapsed_ns[i]);
556 drm_printf(p, "drm-cycles-%s:\t%llu\n",
557 engine_names[i], panfrost_priv->engine_usage.cycles[i]);
558 }
559 drm_printf(p, "drm-maxfreq-%s:\t%lu Hz\n",
560 engine_names[i], pfdev->pfdevfreq.fast_rate);
561 drm_printf(p, "drm-curfreq-%s:\t%lu Hz\n",
562 engine_names[i], pfdev->pfdevfreq.current_frequency);
563 }
564 }
565
panfrost_show_fdinfo(struct drm_printer * p,struct drm_file * file)566 static void panfrost_show_fdinfo(struct drm_printer *p, struct drm_file *file)
567 {
568 struct drm_device *dev = file->minor->dev;
569 struct panfrost_device *pfdev = dev->dev_private;
570
571 panfrost_gpu_show_fdinfo(pfdev, file->driver_priv, p);
572
573 drm_show_memory_stats(p, file);
574 }
575
576 static const struct file_operations panfrost_drm_driver_fops = {
577 .owner = THIS_MODULE,
578 DRM_GEM_FOPS,
579 .show_fdinfo = drm_show_fdinfo,
580 };
581
582 /*
583 * Panfrost driver version:
584 * - 1.0 - initial interface
585 * - 1.1 - adds HEAP and NOEXEC flags for CREATE_BO
586 * - 1.2 - adds AFBC_FEATURES query
587 */
588 static const struct drm_driver panfrost_drm_driver = {
589 .driver_features = DRIVER_RENDER | DRIVER_GEM | DRIVER_SYNCOBJ,
590 .open = panfrost_open,
591 .postclose = panfrost_postclose,
592 .show_fdinfo = panfrost_show_fdinfo,
593 .ioctls = panfrost_drm_driver_ioctls,
594 .num_ioctls = ARRAY_SIZE(panfrost_drm_driver_ioctls),
595 .fops = &panfrost_drm_driver_fops,
596 .name = "panfrost",
597 .desc = "panfrost DRM",
598 .date = "20180908",
599 .major = 1,
600 .minor = 2,
601
602 .gem_create_object = panfrost_gem_create_object,
603 .gem_prime_import_sg_table = panfrost_gem_prime_import_sg_table,
604 };
605
panfrost_probe(struct platform_device * pdev)606 static int panfrost_probe(struct platform_device *pdev)
607 {
608 struct panfrost_device *pfdev;
609 struct drm_device *ddev;
610 int err;
611
612 pfdev = devm_kzalloc(&pdev->dev, sizeof(*pfdev), GFP_KERNEL);
613 if (!pfdev)
614 return -ENOMEM;
615
616 pfdev->pdev = pdev;
617 pfdev->dev = &pdev->dev;
618
619 platform_set_drvdata(pdev, pfdev);
620
621 pfdev->comp = of_device_get_match_data(&pdev->dev);
622 if (!pfdev->comp)
623 return -ENODEV;
624
625 pfdev->coherent = device_get_dma_attr(&pdev->dev) == DEV_DMA_COHERENT;
626
627 /* Allocate and initialize the DRM device. */
628 ddev = drm_dev_alloc(&panfrost_drm_driver, &pdev->dev);
629 if (IS_ERR(ddev))
630 return PTR_ERR(ddev);
631
632 ddev->dev_private = pfdev;
633 pfdev->ddev = ddev;
634
635 mutex_init(&pfdev->shrinker_lock);
636 INIT_LIST_HEAD(&pfdev->shrinker_list);
637
638 err = panfrost_device_init(pfdev);
639 if (err) {
640 if (err != -EPROBE_DEFER)
641 dev_err(&pdev->dev, "Fatal error during GPU init\n");
642 goto err_out0;
643 }
644
645 pm_runtime_set_active(pfdev->dev);
646 pm_runtime_mark_last_busy(pfdev->dev);
647 pm_runtime_enable(pfdev->dev);
648 pm_runtime_set_autosuspend_delay(pfdev->dev, 50); /* ~3 frames */
649 pm_runtime_use_autosuspend(pfdev->dev);
650
651 /*
652 * Register the DRM device with the core and the connectors with
653 * sysfs
654 */
655 err = drm_dev_register(ddev, 0);
656 if (err < 0)
657 goto err_out1;
658
659 err = panfrost_gem_shrinker_init(ddev);
660 if (err)
661 goto err_out2;
662
663 return 0;
664
665 err_out2:
666 drm_dev_unregister(ddev);
667 err_out1:
668 pm_runtime_disable(pfdev->dev);
669 panfrost_device_fini(pfdev);
670 pm_runtime_set_suspended(pfdev->dev);
671 err_out0:
672 drm_dev_put(ddev);
673 return err;
674 }
675
panfrost_remove(struct platform_device * pdev)676 static void panfrost_remove(struct platform_device *pdev)
677 {
678 struct panfrost_device *pfdev = platform_get_drvdata(pdev);
679 struct drm_device *ddev = pfdev->ddev;
680
681 drm_dev_unregister(ddev);
682 panfrost_gem_shrinker_cleanup(ddev);
683
684 pm_runtime_get_sync(pfdev->dev);
685 pm_runtime_disable(pfdev->dev);
686 panfrost_device_fini(pfdev);
687 pm_runtime_set_suspended(pfdev->dev);
688
689 drm_dev_put(ddev);
690 }
691
profiling_show(struct device * dev,struct device_attribute * attr,char * buf)692 static ssize_t profiling_show(struct device *dev,
693 struct device_attribute *attr, char *buf)
694 {
695 struct panfrost_device *pfdev = dev_get_drvdata(dev);
696
697 return sysfs_emit(buf, "%d\n", pfdev->profile_mode);
698 }
699
profiling_store(struct device * dev,struct device_attribute * attr,const char * buf,size_t len)700 static ssize_t profiling_store(struct device *dev,
701 struct device_attribute *attr,
702 const char *buf, size_t len)
703 {
704 struct panfrost_device *pfdev = dev_get_drvdata(dev);
705 bool value;
706 int err;
707
708 err = kstrtobool(buf, &value);
709 if (err)
710 return err;
711
712 pfdev->profile_mode = value;
713
714 return len;
715 }
716
717 static DEVICE_ATTR_RW(profiling);
718
719 static struct attribute *panfrost_attrs[] = {
720 &dev_attr_profiling.attr,
721 NULL,
722 };
723
724 ATTRIBUTE_GROUPS(panfrost);
725
726 /*
727 * The OPP core wants the supply names to be NULL terminated, but we need the
728 * correct num_supplies value for regulator core. Hence, we NULL terminate here
729 * and then initialize num_supplies with ARRAY_SIZE - 1.
730 */
731 static const char * const default_supplies[] = { "mali", NULL };
732 static const struct panfrost_compatible default_data = {
733 .num_supplies = ARRAY_SIZE(default_supplies) - 1,
734 .supply_names = default_supplies,
735 .num_pm_domains = 1, /* optional */
736 .pm_domain_names = NULL,
737 };
738
739 static const struct panfrost_compatible amlogic_data = {
740 .num_supplies = ARRAY_SIZE(default_supplies) - 1,
741 .supply_names = default_supplies,
742 .vendor_quirk = panfrost_gpu_amlogic_quirk,
743 };
744
745 /*
746 * The old data with two power supplies for MT8183 is here only to
747 * keep retro-compatibility with older devicetrees, as DVFS will
748 * not work with this one.
749 *
750 * On new devicetrees please use the _b variant with a single and
751 * coupled regulators instead.
752 */
753 static const char * const mediatek_mt8183_supplies[] = { "mali", "sram", NULL };
754 static const char * const mediatek_mt8183_pm_domains[] = { "core0", "core1", "core2" };
755 static const struct panfrost_compatible mediatek_mt8183_data = {
756 .num_supplies = ARRAY_SIZE(mediatek_mt8183_supplies) - 1,
757 .supply_names = mediatek_mt8183_supplies,
758 .num_pm_domains = ARRAY_SIZE(mediatek_mt8183_pm_domains),
759 .pm_domain_names = mediatek_mt8183_pm_domains,
760 };
761
762 static const char * const mediatek_mt8183_b_supplies[] = { "mali", NULL };
763 static const struct panfrost_compatible mediatek_mt8183_b_data = {
764 .num_supplies = ARRAY_SIZE(mediatek_mt8183_b_supplies) - 1,
765 .supply_names = mediatek_mt8183_b_supplies,
766 .num_pm_domains = ARRAY_SIZE(mediatek_mt8183_pm_domains),
767 .pm_domain_names = mediatek_mt8183_pm_domains,
768 .pm_features = BIT(GPU_PM_CLK_DIS) | BIT(GPU_PM_VREG_OFF),
769 };
770
771 static const char * const mediatek_mt8186_pm_domains[] = { "core0", "core1" };
772 static const struct panfrost_compatible mediatek_mt8186_data = {
773 .num_supplies = ARRAY_SIZE(mediatek_mt8183_b_supplies) - 1,
774 .supply_names = mediatek_mt8183_b_supplies,
775 .num_pm_domains = ARRAY_SIZE(mediatek_mt8186_pm_domains),
776 .pm_domain_names = mediatek_mt8186_pm_domains,
777 .pm_features = BIT(GPU_PM_CLK_DIS) | BIT(GPU_PM_VREG_OFF),
778 };
779
780 /* MT8188 uses the same power domains and power supplies as MT8183 */
781 static const struct panfrost_compatible mediatek_mt8188_data = {
782 .num_supplies = ARRAY_SIZE(mediatek_mt8183_b_supplies) - 1,
783 .supply_names = mediatek_mt8183_b_supplies,
784 .num_pm_domains = ARRAY_SIZE(mediatek_mt8183_pm_domains),
785 .pm_domain_names = mediatek_mt8183_pm_domains,
786 .pm_features = BIT(GPU_PM_CLK_DIS) | BIT(GPU_PM_VREG_OFF),
787 };
788
789 static const char * const mediatek_mt8192_supplies[] = { "mali", NULL };
790 static const char * const mediatek_mt8192_pm_domains[] = { "core0", "core1", "core2",
791 "core3", "core4" };
792 static const struct panfrost_compatible mediatek_mt8192_data = {
793 .num_supplies = ARRAY_SIZE(mediatek_mt8192_supplies) - 1,
794 .supply_names = mediatek_mt8192_supplies,
795 .num_pm_domains = ARRAY_SIZE(mediatek_mt8192_pm_domains),
796 .pm_domain_names = mediatek_mt8192_pm_domains,
797 .pm_features = BIT(GPU_PM_CLK_DIS) | BIT(GPU_PM_VREG_OFF),
798 };
799
800 static const struct of_device_id dt_match[] = {
801 /* Set first to probe before the generic compatibles */
802 { .compatible = "amlogic,meson-gxm-mali",
803 .data = &amlogic_data, },
804 { .compatible = "amlogic,meson-g12a-mali",
805 .data = &amlogic_data, },
806 { .compatible = "arm,mali-t604", .data = &default_data, },
807 { .compatible = "arm,mali-t624", .data = &default_data, },
808 { .compatible = "arm,mali-t628", .data = &default_data, },
809 { .compatible = "arm,mali-t720", .data = &default_data, },
810 { .compatible = "arm,mali-t760", .data = &default_data, },
811 { .compatible = "arm,mali-t820", .data = &default_data, },
812 { .compatible = "arm,mali-t830", .data = &default_data, },
813 { .compatible = "arm,mali-t860", .data = &default_data, },
814 { .compatible = "arm,mali-t880", .data = &default_data, },
815 { .compatible = "arm,mali-bifrost", .data = &default_data, },
816 { .compatible = "arm,mali-valhall-jm", .data = &default_data, },
817 { .compatible = "mediatek,mt8183-mali", .data = &mediatek_mt8183_data },
818 { .compatible = "mediatek,mt8183b-mali", .data = &mediatek_mt8183_b_data },
819 { .compatible = "mediatek,mt8186-mali", .data = &mediatek_mt8186_data },
820 { .compatible = "mediatek,mt8188-mali", .data = &mediatek_mt8188_data },
821 { .compatible = "mediatek,mt8192-mali", .data = &mediatek_mt8192_data },
822 {}
823 };
824 MODULE_DEVICE_TABLE(of, dt_match);
825
826 static struct platform_driver panfrost_driver = {
827 .probe = panfrost_probe,
828 .remove_new = panfrost_remove,
829 .driver = {
830 .name = "panfrost",
831 .pm = pm_ptr(&panfrost_pm_ops),
832 .of_match_table = dt_match,
833 .dev_groups = panfrost_groups,
834 },
835 };
836 module_platform_driver(panfrost_driver);
837
838 MODULE_AUTHOR("Panfrost Project Developers");
839 MODULE_DESCRIPTION("Panfrost DRM Driver");
840 MODULE_LICENSE("GPL v2");
841 MODULE_SOFTDEP("pre: governor_simpleondemand");
842