msm_debugfs.c

  1// SPDX-License-Identifier: GPL-2.0-only
  2/*
  3 * Copyright (C) 2013-2016 Red Hat
  4 * Author: Rob Clark <robdclark@gmail.com>
  5 */
  6
  7#ifdef CONFIG_DEBUG_FS
  8
  9#include <linux/debugfs.h>
 10#include <linux/fault-inject.h>
 11
 12#include <drm/drm_debugfs.h>
 13#include <drm/drm_fb_helper.h>
 14#include <drm/drm_file.h>
 15#include <drm/drm_framebuffer.h>
 16
 17#include "msm_drv.h"
 18#include "msm_gpu.h"
 19#include "msm_kms.h"
 20#include "msm_debugfs.h"
 21#include "disp/msm_disp_snapshot.h"
 22
 23/*
 24 * GPU Snapshot:
 25 */
 26
 27struct msm_gpu_show_priv {
 28	struct msm_gpu_state *state;
 29	struct drm_device *dev;
 30};
 31
 32static int msm_gpu_show(struct seq_file *m, void *arg)
 33{
 34	struct drm_printer p = drm_seq_file_printer(m);
 35	struct msm_gpu_show_priv *show_priv = m->private;
 36	struct msm_drm_private *priv = show_priv->dev->dev_private;
 37	struct msm_gpu *gpu = priv->gpu;
 38	int ret;
 39
 40	ret = mutex_lock_interruptible(&gpu->lock);
 41	if (ret)
 42		return ret;
 43
 44	drm_printf(&p, "%s Status:\n", gpu->name);
 45	gpu->funcs->show(gpu, show_priv->state, &p);
 46
 47	mutex_unlock(&gpu->lock);
 48
 49	return 0;
 50}
 51
 52static int msm_gpu_release(struct inode *inode, struct file *file)
 53{
 54	struct seq_file *m = file->private_data;
 55	struct msm_gpu_show_priv *show_priv = m->private;
 56	struct msm_drm_private *priv = show_priv->dev->dev_private;
 57	struct msm_gpu *gpu = priv->gpu;
 58
 59	mutex_lock(&gpu->lock);
 60	gpu->funcs->gpu_state_put(show_priv->state);
 61	mutex_unlock(&gpu->lock);
 62
 63	kfree(show_priv);
 64
 65	return single_release(inode, file);
 66}
 67
 68static int msm_gpu_open(struct inode *inode, struct file *file)
 69{
 70	struct drm_device *dev = inode->i_private;
 71	struct msm_drm_private *priv = dev->dev_private;
 72	struct msm_gpu *gpu = priv->gpu;
 73	struct msm_gpu_show_priv *show_priv;
 74	int ret;
 75
 76	if (!gpu || !gpu->funcs->gpu_state_get)
 77		return -ENODEV;
 78
 79	show_priv = kmalloc(sizeof(*show_priv), GFP_KERNEL);
 80	if (!show_priv)
 81		return -ENOMEM;
 82
 83	ret = mutex_lock_interruptible(&gpu->lock);
 84	if (ret)
 85		goto free_priv;
 86
 87	pm_runtime_get_sync(&gpu->pdev->dev);
 88	msm_gpu_hw_init(gpu);
 89	show_priv->state = gpu->funcs->gpu_state_get(gpu);
 90	pm_runtime_put_sync(&gpu->pdev->dev);
 91
 92	mutex_unlock(&gpu->lock);
 93
 94	if (IS_ERR(show_priv->state)) {
 95		ret = PTR_ERR(show_priv->state);
 96		goto free_priv;
 97	}
 98
 99	show_priv->dev = dev;
100
101	ret = single_open(file, msm_gpu_show, show_priv);
102	if (ret)
103		goto free_priv;
104
105	return 0;
106
107free_priv:
108	kfree(show_priv);
109	return ret;
110}
111
112static const struct file_operations msm_gpu_fops = {
113	.owner = THIS_MODULE,
114	.open = msm_gpu_open,
115	.read = seq_read,
116	.llseek = seq_lseek,
117	.release = msm_gpu_release,
118};
119
120#ifdef CONFIG_DRM_MSM_KMS
121static int msm_fb_show(struct seq_file *m, void *arg)
122{
123	struct drm_info_node *node = m->private;
124	struct drm_device *dev = node->minor->dev;
125	struct drm_framebuffer *fb, *fbdev_fb = NULL;
126
127	if (dev->fb_helper && dev->fb_helper->fb) {
128		seq_puts(m, "fbcon ");
129		fbdev_fb = dev->fb_helper->fb;
130		msm_framebuffer_describe(fbdev_fb, m);
131	}
132
133	mutex_lock(&dev->mode_config.fb_lock);
134	list_for_each_entry(fb, &dev->mode_config.fb_list, head) {
135		if (fb == fbdev_fb)
136			continue;
137
138		seq_puts(m, "user ");
139		msm_framebuffer_describe(fb, m);
140	}
141	mutex_unlock(&dev->mode_config.fb_lock);
142
143	return 0;
144}
145
146static struct drm_info_list msm_kms_debugfs_list[] = {
147		{ "fb", msm_fb_show },
148};
149
150/*
151 * Display Snapshot:
152 */
153
154static int msm_kms_show(struct seq_file *m, void *arg)
155{
156	struct drm_printer p = drm_seq_file_printer(m);
157	struct msm_disp_state *state = m->private;
158
159	msm_disp_state_print(state, &p);
160
161	return 0;
162}
163
164static int msm_kms_release(struct inode *inode, struct file *file)
165{
166	struct seq_file *m = file->private_data;
167	struct msm_disp_state *state = m->private;
168
169	msm_disp_state_free(state);
170
171	return single_release(inode, file);
172}
173
174static int msm_kms_open(struct inode *inode, struct file *file)
175{
176	struct drm_device *dev = inode->i_private;
177	struct msm_drm_private *priv = dev->dev_private;
178	struct msm_disp_state *state;
179	int ret;
180
181	if (!priv->kms)
182		return -ENODEV;
183
184	ret = mutex_lock_interruptible(&priv->kms->dump_mutex);
185	if (ret)
186		return ret;
187
188	state = msm_disp_snapshot_state_sync(priv->kms);
189
190	mutex_unlock(&priv->kms->dump_mutex);
191
192	if (IS_ERR(state)) {
193		return PTR_ERR(state);
194	}
195
196	ret = single_open(file, msm_kms_show, state);
197	if (ret) {
198		msm_disp_state_free(state);
199		return ret;
200	}
201
202	return 0;
203}
204
205static const struct file_operations msm_kms_fops = {
206	.owner = THIS_MODULE,
207	.open = msm_kms_open,
208	.read = seq_read,
209	.llseek = seq_lseek,
210	.release = msm_kms_release,
211};
212
213static void msm_debugfs_kms_init(struct drm_minor *minor)
214{
215	struct drm_device *dev = minor->dev;
216	struct msm_drm_private *priv = dev->dev_private;
217
218	drm_debugfs_create_files(msm_kms_debugfs_list,
219				 ARRAY_SIZE(msm_kms_debugfs_list),
220				 minor->debugfs_root, minor);
221	debugfs_create_file("kms", 0400, minor->debugfs_root,
222			    dev, &msm_kms_fops);
223
224	if (priv->kms->funcs->debugfs_init)
225		priv->kms->funcs->debugfs_init(priv->kms, minor);
226
227}
228#else /* ! CONFIG_DRM_MSM_KMS */
229static void msm_debugfs_kms_init(struct drm_minor *minor)
230{
231}
232#endif
233
234/*
235 * Other debugfs:
236 */
237
238static unsigned long last_shrink_freed;
239
240static int
241shrink_get(void *data, u64 *val)
242{
243	*val = last_shrink_freed;
244
245	return 0;
246}
247
248static int
249shrink_set(void *data, u64 val)
250{
251	struct drm_device *dev = data;
252
253	last_shrink_freed = msm_gem_shrinker_shrink(dev, val);
254
255	return 0;
256}
257
258DEFINE_DEBUGFS_ATTRIBUTE(shrink_fops,
259			 shrink_get, shrink_set,
260			 "0x%08llx\n");
261
262/*
263 * Return the number of microseconds to wait until stall-on-fault is
264 * re-enabled. If 0 then it is already enabled or will be re-enabled on the
265 * next submit (unless there's a leftover devcoredump). This is useful for
266 * kernel tests that intentionally produce a fault and check the devcoredump to
267 * wait until the cooldown period is over.
268 */
269
270static int
271stall_reenable_time_get(void *data, u64 *val)
272{
273	struct msm_drm_private *priv = data;
274	unsigned long irq_flags;
275
276	spin_lock_irqsave(&priv->fault_stall_lock, irq_flags);
277
278	if (priv->stall_enabled)
279		*val = 0;
280	else
281		*val = max(ktime_us_delta(priv->stall_reenable_time, ktime_get()), 0);
282
283	spin_unlock_irqrestore(&priv->fault_stall_lock, irq_flags);
284
285	return 0;
286}
287
288DEFINE_DEBUGFS_ATTRIBUTE(stall_reenable_time_fops,
289			 stall_reenable_time_get, NULL,
290			 "%lld\n");
291
292static int msm_gem_show(struct seq_file *m, void *arg)
293{
294	struct drm_info_node *node = m->private;
295	struct drm_device *dev = node->minor->dev;
296	struct msm_drm_private *priv = dev->dev_private;
297	int ret;
298
299	ret = mutex_lock_interruptible(&priv->obj_lock);
300	if (ret)
301		return ret;
302
303	msm_gem_describe_objects(&priv->objects, m);
304
305	mutex_unlock(&priv->obj_lock);
306
307	return 0;
308}
309
310static int msm_mm_show(struct seq_file *m, void *arg)
311{
312	struct drm_info_node *node = m->private;
313	struct drm_device *dev = node->minor->dev;
314	struct drm_printer p = drm_seq_file_printer(m);
315
316	drm_mm_print(&dev->vma_offset_manager->vm_addr_space_mm, &p);
317
318	return 0;
319}
320
321static struct drm_info_list msm_debugfs_list[] = {
322		{"gem", msm_gem_show},
323		{ "mm", msm_mm_show },
324};
325
326static int late_init_minor(struct drm_minor *minor)
327{
328	struct drm_device *dev;
329	struct msm_drm_private *priv;
330	int ret;
331
332	if (!minor)
333		return 0;
334
335	dev = minor->dev;
336	priv = dev->dev_private;
337
338	if (!priv->gpu_pdev)
339		return 0;
340
341	ret = msm_rd_debugfs_init(minor);
342	if (ret) {
343		DRM_DEV_ERROR(dev->dev, "could not install rd debugfs\n");
344		return ret;
345	}
346
347	ret = msm_perf_debugfs_init(minor);
348	if (ret) {
349		DRM_DEV_ERROR(dev->dev, "could not install perf debugfs\n");
350		return ret;
351	}
352
353	return 0;
354}
355
356int msm_debugfs_late_init(struct drm_device *dev)
357{
358	int ret;
359	ret = late_init_minor(dev->primary);
360	if (ret)
361		return ret;
362	ret = late_init_minor(dev->render);
363	return ret;
364}
365
366static void msm_debugfs_gpu_init(struct drm_minor *minor)
367{
368	struct drm_device *dev = minor->dev;
369	struct msm_drm_private *priv = dev->dev_private;
370	struct dentry *gpu_devfreq;
371
372	debugfs_create_file("gpu", S_IRUSR, minor->debugfs_root,
373		dev, &msm_gpu_fops);
374
375	debugfs_create_u32("hangcheck_period_ms", 0600, minor->debugfs_root,
376		&priv->hangcheck_period);
377
378	debugfs_create_bool("disable_err_irq", 0600, minor->debugfs_root,
379		&priv->disable_err_irq);
380
381	debugfs_create_file("stall_reenable_time_us", 0400, minor->debugfs_root,
382		priv, &stall_reenable_time_fops);
383
384	gpu_devfreq = debugfs_create_dir("devfreq", minor->debugfs_root);
385
386	debugfs_create_bool("idle_clamp",0600, gpu_devfreq,
387			    &priv->gpu_clamp_to_idle);
388
389	debugfs_create_u32("upthreshold",0600, gpu_devfreq,
390			   &priv->gpu_devfreq_config.upthreshold);
391
392	debugfs_create_u32("downdifferential",0600, gpu_devfreq,
393			   &priv->gpu_devfreq_config.downdifferential);
394}
395
396void msm_debugfs_init(struct drm_minor *minor)
397{
398	struct drm_device *dev = minor->dev;
399	struct msm_drm_private *priv = dev->dev_private;
400
401	drm_debugfs_create_files(msm_debugfs_list,
402				 ARRAY_SIZE(msm_debugfs_list),
403				 minor->debugfs_root, minor);
404
405	if (priv->gpu_pdev)
406		msm_debugfs_gpu_init(minor);
407
408	if (priv->kms)
409		msm_debugfs_kms_init(minor);
410
411	debugfs_create_file("shrink", S_IRWXU, minor->debugfs_root,
412		dev, &shrink_fops);
413
414	fault_create_debugfs_attr("fail_gem_alloc", minor->debugfs_root,
415				  &fail_gem_alloc);
416	fault_create_debugfs_attr("fail_gem_iova", minor->debugfs_root,
417				  &fail_gem_iova);
418}
419#endif
420