1 // SPDX-License-Identifier: GPL-2.0 OR MIT
2 /* Copyright 2017-2019 Qiang Yu <yuq825@gmail.com> */
3
4 #include <linux/module.h>
5 #include <linux/of_platform.h>
6 #include <linux/uaccess.h>
7 #include <linux/slab.h>
8 #include <linux/pm_runtime.h>
9 #include <drm/drm_ioctl.h>
10 #include <drm/drm_drv.h>
11 #include <drm/drm_prime.h>
12 #include <drm/lima_drm.h>
13
14 #include "lima_device.h"
15 #include "lima_drv.h"
16 #include "lima_gem.h"
17 #include "lima_vm.h"
18
19 int lima_sched_timeout_ms;
20 uint lima_heap_init_nr_pages = 8;
21 uint lima_max_error_tasks;
22 uint lima_job_hang_limit;
23
24 MODULE_PARM_DESC(sched_timeout_ms, "task run timeout in ms");
25 module_param_named(sched_timeout_ms, lima_sched_timeout_ms, int, 0444);
26
27 MODULE_PARM_DESC(heap_init_nr_pages, "heap buffer init number of pages");
28 module_param_named(heap_init_nr_pages, lima_heap_init_nr_pages, uint, 0444);
29
30 MODULE_PARM_DESC(max_error_tasks, "max number of error tasks to save");
31 module_param_named(max_error_tasks, lima_max_error_tasks, uint, 0644);
32
33 MODULE_PARM_DESC(job_hang_limit, "number of times to allow a job to hang before dropping it (default 0)");
34 module_param_named(job_hang_limit, lima_job_hang_limit, uint, 0444);
35
lima_ioctl_get_param(struct drm_device * dev,void * data,struct drm_file * file)36 static int lima_ioctl_get_param(struct drm_device *dev, void *data, struct drm_file *file)
37 {
38 struct drm_lima_get_param *args = data;
39 struct lima_device *ldev = to_lima_dev(dev);
40
41 if (args->pad)
42 return -EINVAL;
43
44 switch (args->param) {
45 case DRM_LIMA_PARAM_GPU_ID:
46 switch (ldev->id) {
47 case lima_gpu_mali400:
48 args->value = DRM_LIMA_PARAM_GPU_ID_MALI400;
49 break;
50 case lima_gpu_mali450:
51 args->value = DRM_LIMA_PARAM_GPU_ID_MALI450;
52 break;
53 default:
54 args->value = DRM_LIMA_PARAM_GPU_ID_UNKNOWN;
55 break;
56 }
57 break;
58
59 case DRM_LIMA_PARAM_NUM_PP:
60 args->value = ldev->pipe[lima_pipe_pp].num_processor;
61 break;
62
63 case DRM_LIMA_PARAM_GP_VERSION:
64 args->value = ldev->gp_version;
65 break;
66
67 case DRM_LIMA_PARAM_PP_VERSION:
68 args->value = ldev->pp_version;
69 break;
70
71 default:
72 return -EINVAL;
73 }
74
75 return 0;
76 }
77
lima_ioctl_gem_create(struct drm_device * dev,void * data,struct drm_file * file)78 static int lima_ioctl_gem_create(struct drm_device *dev, void *data, struct drm_file *file)
79 {
80 struct drm_lima_gem_create *args = data;
81
82 if (args->pad)
83 return -EINVAL;
84
85 if (args->flags & ~(LIMA_BO_FLAG_HEAP))
86 return -EINVAL;
87
88 if (args->size == 0)
89 return -EINVAL;
90
91 return lima_gem_create_handle(dev, file, args->size, args->flags, &args->handle);
92 }
93
lima_ioctl_gem_info(struct drm_device * dev,void * data,struct drm_file * file)94 static int lima_ioctl_gem_info(struct drm_device *dev, void *data, struct drm_file *file)
95 {
96 struct drm_lima_gem_info *args = data;
97
98 return lima_gem_get_info(file, args->handle, &args->va, &args->offset);
99 }
100
lima_ioctl_gem_submit(struct drm_device * dev,void * data,struct drm_file * file)101 static int lima_ioctl_gem_submit(struct drm_device *dev, void *data, struct drm_file *file)
102 {
103 struct drm_lima_gem_submit *args = data;
104 struct lima_device *ldev = to_lima_dev(dev);
105 struct lima_drm_priv *priv = file->driver_priv;
106 struct drm_lima_gem_submit_bo *bos;
107 struct lima_sched_pipe *pipe;
108 struct lima_sched_task *task;
109 struct lima_ctx *ctx;
110 struct lima_submit submit = {0};
111 size_t size;
112 int err = 0;
113
114 if (args->pipe >= lima_pipe_num || args->nr_bos == 0)
115 return -EINVAL;
116
117 if (args->flags & ~(LIMA_SUBMIT_FLAG_EXPLICIT_FENCE))
118 return -EINVAL;
119
120 pipe = ldev->pipe + args->pipe;
121 if (args->frame_size != pipe->frame_size)
122 return -EINVAL;
123
124 bos = kvcalloc(args->nr_bos, sizeof(*submit.bos) + sizeof(*submit.lbos), GFP_KERNEL);
125 if (!bos)
126 return -ENOMEM;
127
128 size = args->nr_bos * sizeof(*submit.bos);
129 if (copy_from_user(bos, u64_to_user_ptr(args->bos), size)) {
130 err = -EFAULT;
131 goto out0;
132 }
133
134 task = kmem_cache_zalloc(pipe->task_slab, GFP_KERNEL);
135 if (!task) {
136 err = -ENOMEM;
137 goto out0;
138 }
139
140 task->frame = task + 1;
141 if (copy_from_user(task->frame, u64_to_user_ptr(args->frame), args->frame_size)) {
142 err = -EFAULT;
143 goto out1;
144 }
145
146 err = pipe->task_validate(pipe, task);
147 if (err)
148 goto out1;
149
150 ctx = lima_ctx_get(&priv->ctx_mgr, args->ctx);
151 if (!ctx) {
152 err = -ENOENT;
153 goto out1;
154 }
155
156 submit.pipe = args->pipe;
157 submit.bos = bos;
158 submit.lbos = (void *)bos + size;
159 submit.nr_bos = args->nr_bos;
160 submit.task = task;
161 submit.ctx = ctx;
162 submit.flags = args->flags;
163 submit.in_sync[0] = args->in_sync[0];
164 submit.in_sync[1] = args->in_sync[1];
165 submit.out_sync = args->out_sync;
166
167 err = lima_gem_submit(file, &submit);
168
169 lima_ctx_put(ctx);
170 out1:
171 if (err)
172 kmem_cache_free(pipe->task_slab, task);
173 out0:
174 kvfree(bos);
175 return err;
176 }
177
lima_ioctl_gem_wait(struct drm_device * dev,void * data,struct drm_file * file)178 static int lima_ioctl_gem_wait(struct drm_device *dev, void *data, struct drm_file *file)
179 {
180 struct drm_lima_gem_wait *args = data;
181
182 if (args->op & ~(LIMA_GEM_WAIT_READ|LIMA_GEM_WAIT_WRITE))
183 return -EINVAL;
184
185 return lima_gem_wait(file, args->handle, args->op, args->timeout_ns);
186 }
187
lima_ioctl_ctx_create(struct drm_device * dev,void * data,struct drm_file * file)188 static int lima_ioctl_ctx_create(struct drm_device *dev, void *data, struct drm_file *file)
189 {
190 struct drm_lima_ctx_create *args = data;
191 struct lima_drm_priv *priv = file->driver_priv;
192 struct lima_device *ldev = to_lima_dev(dev);
193
194 if (args->_pad)
195 return -EINVAL;
196
197 return lima_ctx_create(ldev, &priv->ctx_mgr, &args->id);
198 }
199
lima_ioctl_ctx_free(struct drm_device * dev,void * data,struct drm_file * file)200 static int lima_ioctl_ctx_free(struct drm_device *dev, void *data, struct drm_file *file)
201 {
202 struct drm_lima_ctx_create *args = data;
203 struct lima_drm_priv *priv = file->driver_priv;
204
205 if (args->_pad)
206 return -EINVAL;
207
208 return lima_ctx_free(&priv->ctx_mgr, args->id);
209 }
210
lima_drm_driver_open(struct drm_device * dev,struct drm_file * file)211 static int lima_drm_driver_open(struct drm_device *dev, struct drm_file *file)
212 {
213 int err;
214 struct lima_drm_priv *priv;
215 struct lima_device *ldev = to_lima_dev(dev);
216
217 priv = kzalloc(sizeof(*priv), GFP_KERNEL);
218 if (!priv)
219 return -ENOMEM;
220
221 priv->vm = lima_vm_create(ldev);
222 if (!priv->vm) {
223 err = -ENOMEM;
224 goto err_out0;
225 }
226
227 lima_ctx_mgr_init(&priv->ctx_mgr);
228
229 file->driver_priv = priv;
230 return 0;
231
232 err_out0:
233 kfree(priv);
234 return err;
235 }
236
lima_drm_driver_postclose(struct drm_device * dev,struct drm_file * file)237 static void lima_drm_driver_postclose(struct drm_device *dev, struct drm_file *file)
238 {
239 struct lima_drm_priv *priv = file->driver_priv;
240
241 lima_ctx_mgr_fini(&priv->ctx_mgr);
242 lima_vm_put(priv->vm);
243 kfree(priv);
244 }
245
246 static const struct drm_ioctl_desc lima_drm_driver_ioctls[] = {
247 DRM_IOCTL_DEF_DRV(LIMA_GET_PARAM, lima_ioctl_get_param, DRM_RENDER_ALLOW),
248 DRM_IOCTL_DEF_DRV(LIMA_GEM_CREATE, lima_ioctl_gem_create, DRM_RENDER_ALLOW),
249 DRM_IOCTL_DEF_DRV(LIMA_GEM_INFO, lima_ioctl_gem_info, DRM_RENDER_ALLOW),
250 DRM_IOCTL_DEF_DRV(LIMA_GEM_SUBMIT, lima_ioctl_gem_submit, DRM_RENDER_ALLOW),
251 DRM_IOCTL_DEF_DRV(LIMA_GEM_WAIT, lima_ioctl_gem_wait, DRM_RENDER_ALLOW),
252 DRM_IOCTL_DEF_DRV(LIMA_CTX_CREATE, lima_ioctl_ctx_create, DRM_RENDER_ALLOW),
253 DRM_IOCTL_DEF_DRV(LIMA_CTX_FREE, lima_ioctl_ctx_free, DRM_RENDER_ALLOW),
254 };
255
256 DEFINE_DRM_GEM_FOPS(lima_drm_driver_fops);
257
258 /**
259 * Changelog:
260 *
261 * - 1.1.0 - add heap buffer support
262 */
263
264 static struct drm_driver lima_drm_driver = {
265 .driver_features = DRIVER_RENDER | DRIVER_GEM | DRIVER_SYNCOBJ,
266 .open = lima_drm_driver_open,
267 .postclose = lima_drm_driver_postclose,
268 .ioctls = lima_drm_driver_ioctls,
269 .num_ioctls = ARRAY_SIZE(lima_drm_driver_ioctls),
270 .fops = &lima_drm_driver_fops,
271 .name = "lima",
272 .desc = "lima DRM",
273 .date = "20191231",
274 .major = 1,
275 .minor = 1,
276 .patchlevel = 0,
277
278 .gem_create_object = lima_gem_create_object,
279 .prime_fd_to_handle = drm_gem_prime_fd_to_handle,
280 .gem_prime_import_sg_table = drm_gem_shmem_prime_import_sg_table,
281 .prime_handle_to_fd = drm_gem_prime_handle_to_fd,
282 .gem_prime_mmap = drm_gem_prime_mmap,
283 };
284
285 struct lima_block_reader {
286 void *dst;
287 size_t base;
288 size_t count;
289 size_t off;
290 ssize_t read;
291 };
292
lima_read_block(struct lima_block_reader * reader,void * src,size_t src_size)293 static bool lima_read_block(struct lima_block_reader *reader,
294 void *src, size_t src_size)
295 {
296 size_t max_off = reader->base + src_size;
297
298 if (reader->off < max_off) {
299 size_t size = min_t(size_t, max_off - reader->off,
300 reader->count);
301
302 memcpy(reader->dst, src + (reader->off - reader->base), size);
303
304 reader->dst += size;
305 reader->off += size;
306 reader->read += size;
307 reader->count -= size;
308 }
309
310 reader->base = max_off;
311
312 return !!reader->count;
313 }
314
lima_error_state_read(struct file * filp,struct kobject * kobj,struct bin_attribute * attr,char * buf,loff_t off,size_t count)315 static ssize_t lima_error_state_read(struct file *filp, struct kobject *kobj,
316 struct bin_attribute *attr, char *buf,
317 loff_t off, size_t count)
318 {
319 struct device *dev = kobj_to_dev(kobj);
320 struct lima_device *ldev = dev_get_drvdata(dev);
321 struct lima_sched_error_task *et;
322 struct lima_block_reader reader = {
323 .dst = buf,
324 .count = count,
325 .off = off,
326 };
327
328 mutex_lock(&ldev->error_task_list_lock);
329
330 if (lima_read_block(&reader, &ldev->dump, sizeof(ldev->dump))) {
331 list_for_each_entry(et, &ldev->error_task_list, list) {
332 if (!lima_read_block(&reader, et->data, et->size))
333 break;
334 }
335 }
336
337 mutex_unlock(&ldev->error_task_list_lock);
338 return reader.read;
339 }
340
lima_error_state_write(struct file * file,struct kobject * kobj,struct bin_attribute * attr,char * buf,loff_t off,size_t count)341 static ssize_t lima_error_state_write(struct file *file, struct kobject *kobj,
342 struct bin_attribute *attr, char *buf,
343 loff_t off, size_t count)
344 {
345 struct device *dev = kobj_to_dev(kobj);
346 struct lima_device *ldev = dev_get_drvdata(dev);
347 struct lima_sched_error_task *et, *tmp;
348
349 mutex_lock(&ldev->error_task_list_lock);
350
351 list_for_each_entry_safe(et, tmp, &ldev->error_task_list, list) {
352 list_del(&et->list);
353 kvfree(et);
354 }
355
356 ldev->dump.size = 0;
357 ldev->dump.num_tasks = 0;
358
359 mutex_unlock(&ldev->error_task_list_lock);
360
361 return count;
362 }
363
364 static const struct bin_attribute lima_error_state_attr = {
365 .attr.name = "error",
366 .attr.mode = 0600,
367 .size = 0,
368 .read = lima_error_state_read,
369 .write = lima_error_state_write,
370 };
371
lima_pdev_probe(struct platform_device * pdev)372 static int lima_pdev_probe(struct platform_device *pdev)
373 {
374 struct lima_device *ldev;
375 struct drm_device *ddev;
376 int err;
377
378 err = lima_sched_slab_init();
379 if (err)
380 return err;
381
382 ldev = devm_kzalloc(&pdev->dev, sizeof(*ldev), GFP_KERNEL);
383 if (!ldev) {
384 err = -ENOMEM;
385 goto err_out0;
386 }
387
388 ldev->dev = &pdev->dev;
389 ldev->id = (enum lima_gpu_id)of_device_get_match_data(&pdev->dev);
390
391 platform_set_drvdata(pdev, ldev);
392
393 /* Allocate and initialize the DRM device. */
394 ddev = drm_dev_alloc(&lima_drm_driver, &pdev->dev);
395 if (IS_ERR(ddev))
396 return PTR_ERR(ddev);
397
398 ddev->dev_private = ldev;
399 ldev->ddev = ddev;
400
401 err = lima_device_init(ldev);
402 if (err)
403 goto err_out1;
404
405 err = lima_devfreq_init(ldev);
406 if (err) {
407 dev_err(&pdev->dev, "Fatal error during devfreq init\n");
408 goto err_out2;
409 }
410
411 pm_runtime_set_active(ldev->dev);
412 pm_runtime_mark_last_busy(ldev->dev);
413 pm_runtime_set_autosuspend_delay(ldev->dev, 200);
414 pm_runtime_use_autosuspend(ldev->dev);
415 pm_runtime_enable(ldev->dev);
416
417 /*
418 * Register the DRM device with the core and the connectors with
419 * sysfs.
420 */
421 err = drm_dev_register(ddev, 0);
422 if (err < 0)
423 goto err_out3;
424
425 if (sysfs_create_bin_file(&ldev->dev->kobj, &lima_error_state_attr))
426 dev_warn(ldev->dev, "fail to create error state sysfs\n");
427
428 return 0;
429
430 err_out3:
431 pm_runtime_disable(ldev->dev);
432 lima_devfreq_fini(ldev);
433 err_out2:
434 lima_device_fini(ldev);
435 err_out1:
436 drm_dev_put(ddev);
437 err_out0:
438 lima_sched_slab_fini();
439 return err;
440 }
441
lima_pdev_remove(struct platform_device * pdev)442 static int lima_pdev_remove(struct platform_device *pdev)
443 {
444 struct lima_device *ldev = platform_get_drvdata(pdev);
445 struct drm_device *ddev = ldev->ddev;
446
447 sysfs_remove_bin_file(&ldev->dev->kobj, &lima_error_state_attr);
448
449 drm_dev_unregister(ddev);
450
451 /* stop autosuspend to make sure device is in active state */
452 pm_runtime_set_autosuspend_delay(ldev->dev, -1);
453 pm_runtime_disable(ldev->dev);
454
455 lima_devfreq_fini(ldev);
456 lima_device_fini(ldev);
457
458 drm_dev_put(ddev);
459 lima_sched_slab_fini();
460 return 0;
461 }
462
463 static const struct of_device_id dt_match[] = {
464 { .compatible = "arm,mali-400", .data = (void *)lima_gpu_mali400 },
465 { .compatible = "arm,mali-450", .data = (void *)lima_gpu_mali450 },
466 {}
467 };
468 MODULE_DEVICE_TABLE(of, dt_match);
469
470 static const struct dev_pm_ops lima_pm_ops = {
471 SET_SYSTEM_SLEEP_PM_OPS(pm_runtime_force_suspend, pm_runtime_force_resume)
472 SET_RUNTIME_PM_OPS(lima_device_suspend, lima_device_resume, NULL)
473 };
474
475 static struct platform_driver lima_platform_driver = {
476 .probe = lima_pdev_probe,
477 .remove = lima_pdev_remove,
478 .driver = {
479 .name = "lima",
480 .pm = &lima_pm_ops,
481 .of_match_table = dt_match,
482 },
483 };
484
485 module_platform_driver(lima_platform_driver);
486
487 MODULE_AUTHOR("Lima Project Developers");
488 MODULE_DESCRIPTION("Lima DRM Driver");
489 MODULE_LICENSE("GPL v2");
490