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/*
121 * Display Snapshot:
122 */
123
124static int msm_kms_show(struct seq_file *m, void *arg)
125{
126	struct drm_printer p = drm_seq_file_printer(m);
127	struct msm_disp_state *state = m->private;
128
129	msm_disp_state_print(state, &p);
130
131	return 0;
132}
133
134static int msm_kms_release(struct inode *inode, struct file *file)
135{
136	struct seq_file *m = file->private_data;
137	struct msm_disp_state *state = m->private;
138
139	msm_disp_state_free(state);
140
141	return single_release(inode, file);
142}
143
144static int msm_kms_open(struct inode *inode, struct file *file)
145{
146	struct drm_device *dev = inode->i_private;
147	struct msm_drm_private *priv = dev->dev_private;
148	struct msm_disp_state *state;
149	int ret;
150
151	if (!priv->kms)
152		return -ENODEV;
153
154	ret = mutex_lock_interruptible(&priv->kms->dump_mutex);
155	if (ret)
156		return ret;
157
158	state = msm_disp_snapshot_state_sync(priv->kms);
159
160	mutex_unlock(&priv->kms->dump_mutex);
161
162	if (IS_ERR(state)) {
163		return PTR_ERR(state);
164	}
165
166	ret = single_open(file, msm_kms_show, state);
167	if (ret) {
168		msm_disp_state_free(state);
169		return ret;
170	}
171
172	return 0;
173}
174
175static const struct file_operations msm_kms_fops = {
176	.owner = THIS_MODULE,
177	.open = msm_kms_open,
178	.read = seq_read,
179	.llseek = seq_lseek,
180	.release = msm_kms_release,
181};
182
183/*
184 * Other debugfs:
185 */
186
187static unsigned long last_shrink_freed;
188
189static int
190shrink_get(void *data, u64 *val)
191{
192	*val = last_shrink_freed;
193
194	return 0;
195}
196
197static int
198shrink_set(void *data, u64 val)
199{
200	struct drm_device *dev = data;
201
202	last_shrink_freed = msm_gem_shrinker_shrink(dev, val);
203
204	return 0;
205}
206
207DEFINE_DEBUGFS_ATTRIBUTE(shrink_fops,
208			 shrink_get, shrink_set,
209			 "0x%08llx\n");
210
211
212static int msm_gem_show(struct seq_file *m, void *arg)
213{
214	struct drm_info_node *node = m->private;
215	struct drm_device *dev = node->minor->dev;
216	struct msm_drm_private *priv = dev->dev_private;
217	int ret;
218
219	ret = mutex_lock_interruptible(&priv->obj_lock);
220	if (ret)
221		return ret;
222
223	msm_gem_describe_objects(&priv->objects, m);
224
225	mutex_unlock(&priv->obj_lock);
226
227	return 0;
228}
229
230static int msm_mm_show(struct seq_file *m, void *arg)
231{
232	struct drm_info_node *node = m->private;
233	struct drm_device *dev = node->minor->dev;
234	struct drm_printer p = drm_seq_file_printer(m);
235
236	drm_mm_print(&dev->vma_offset_manager->vm_addr_space_mm, &p);
237
238	return 0;
239}
240
241static int msm_fb_show(struct seq_file *m, void *arg)
242{
243	struct drm_info_node *node = m->private;
244	struct drm_device *dev = node->minor->dev;
245	struct drm_framebuffer *fb, *fbdev_fb = NULL;
246
247	if (dev->fb_helper && dev->fb_helper->fb) {
248		seq_printf(m, "fbcon ");
249		fbdev_fb = dev->fb_helper->fb;
250		msm_framebuffer_describe(fbdev_fb, m);
251	}
252
253	mutex_lock(&dev->mode_config.fb_lock);
254	list_for_each_entry(fb, &dev->mode_config.fb_list, head) {
255		if (fb == fbdev_fb)
256			continue;
257
258		seq_printf(m, "user ");
259		msm_framebuffer_describe(fb, m);
260	}
261	mutex_unlock(&dev->mode_config.fb_lock);
262
263	return 0;
264}
265
266static struct drm_info_list msm_debugfs_list[] = {
267		{"gem", msm_gem_show},
268		{ "mm", msm_mm_show },
269};
270
271static struct drm_info_list msm_kms_debugfs_list[] = {
272		{ "fb", msm_fb_show },
273};
274
275static int late_init_minor(struct drm_minor *minor)
276{
277	int ret;
278
279	if (!minor)
280		return 0;
281
282	ret = msm_rd_debugfs_init(minor);
283	if (ret) {
284		DRM_DEV_ERROR(minor->dev->dev, "could not install rd debugfs\n");
285		return ret;
286	}
287
288	ret = msm_perf_debugfs_init(minor);
289	if (ret) {
290		DRM_DEV_ERROR(minor->dev->dev, "could not install perf debugfs\n");
291		return ret;
292	}
293
294	return 0;
295}
296
297int msm_debugfs_late_init(struct drm_device *dev)
298{
299	int ret;
300	ret = late_init_minor(dev->primary);
301	if (ret)
302		return ret;
303	ret = late_init_minor(dev->render);
304	return ret;
305}
306
307static void msm_debugfs_gpu_init(struct drm_minor *minor)
308{
309	struct drm_device *dev = minor->dev;
310	struct msm_drm_private *priv = dev->dev_private;
311	struct dentry *gpu_devfreq;
312
313	debugfs_create_file("gpu", S_IRUSR, minor->debugfs_root,
314		dev, &msm_gpu_fops);
315
316	debugfs_create_u32("hangcheck_period_ms", 0600, minor->debugfs_root,
317		&priv->hangcheck_period);
318
319	debugfs_create_bool("disable_err_irq", 0600, minor->debugfs_root,
320		&priv->disable_err_irq);
321
322	gpu_devfreq = debugfs_create_dir("devfreq", minor->debugfs_root);
323
324	debugfs_create_bool("idle_clamp",0600, gpu_devfreq,
325			    &priv->gpu_clamp_to_idle);
326
327	debugfs_create_u32("upthreshold",0600, gpu_devfreq,
328			   &priv->gpu_devfreq_config.upthreshold);
329
330	debugfs_create_u32("downdifferential",0600, gpu_devfreq,
331			   &priv->gpu_devfreq_config.downdifferential);
332}
333
334void msm_debugfs_init(struct drm_minor *minor)
335{
336	struct drm_device *dev = minor->dev;
337	struct msm_drm_private *priv = dev->dev_private;
338
339	drm_debugfs_create_files(msm_debugfs_list,
340				 ARRAY_SIZE(msm_debugfs_list),
341				 minor->debugfs_root, minor);
342
343	if (priv->gpu_pdev)
344		msm_debugfs_gpu_init(minor);
345
346	if (priv->kms) {
347		drm_debugfs_create_files(msm_kms_debugfs_list,
348					 ARRAY_SIZE(msm_kms_debugfs_list),
349					 minor->debugfs_root, minor);
350		debugfs_create_file("kms", S_IRUSR, minor->debugfs_root,
351				    dev, &msm_kms_fops);
352	}
353
354	debugfs_create_file("shrink", S_IRWXU, minor->debugfs_root,
355		dev, &shrink_fops);
356
357	if (priv->kms && priv->kms->funcs->debugfs_init)
358		priv->kms->funcs->debugfs_init(priv->kms, minor);
359
360#ifdef CONFIG_FAULT_INJECTION
361	fault_create_debugfs_attr("fail_gem_alloc", minor->debugfs_root,
362				  &fail_gem_alloc);
363	fault_create_debugfs_attr("fail_gem_iova", minor->debugfs_root,
364				  &fail_gem_iova);
365#endif
366}
367#endif
368