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
 11#include <drm/drm_debugfs.h>
 12#include <drm/drm_file.h>
 13
 14#include "msm_drv.h"
 15#include "msm_gpu.h"
 16#include "msm_kms.h"
 17#include "msm_debugfs.h"
 18
 19struct msm_gpu_show_priv {
 20	struct msm_gpu_state *state;
 21	struct drm_device *dev;
 22};
 23
 24static int msm_gpu_show(struct seq_file *m, void *arg)
 25{
 26	struct drm_printer p = drm_seq_file_printer(m);
 27	struct msm_gpu_show_priv *show_priv = m->private;
 28	struct msm_drm_private *priv = show_priv->dev->dev_private;
 29	struct msm_gpu *gpu = priv->gpu;
 30	int ret;
 31
 32	ret = mutex_lock_interruptible(&show_priv->dev->struct_mutex);
 33	if (ret)
 34		return ret;
 35
 36	drm_printf(&p, "%s Status:\n", gpu->name);
 37	gpu->funcs->show(gpu, show_priv->state, &p);
 38
 39	mutex_unlock(&show_priv->dev->struct_mutex);
 40
 41	return 0;
 42}
 43
 44static int msm_gpu_release(struct inode *inode, struct file *file)
 45{
 46	struct seq_file *m = file->private_data;
 47	struct msm_gpu_show_priv *show_priv = m->private;
 48	struct msm_drm_private *priv = show_priv->dev->dev_private;
 49	struct msm_gpu *gpu = priv->gpu;
 50
 51	mutex_lock(&show_priv->dev->struct_mutex);
 52	gpu->funcs->gpu_state_put(show_priv->state);
 53	mutex_unlock(&show_priv->dev->struct_mutex);
 54
 55	kfree(show_priv);
 56
 57	return single_release(inode, file);
 58}
 59
 60static int msm_gpu_open(struct inode *inode, struct file *file)
 61{
 62	struct drm_device *dev = inode->i_private;
 63	struct msm_drm_private *priv = dev->dev_private;
 64	struct msm_gpu *gpu = priv->gpu;
 65	struct msm_gpu_show_priv *show_priv;
 66	int ret;
 67
 68	if (!gpu || !gpu->funcs->gpu_state_get)
 69		return -ENODEV;
 70
 71	show_priv = kmalloc(sizeof(*show_priv), GFP_KERNEL);
 72	if (!show_priv)
 73		return -ENOMEM;
 74
 75	ret = mutex_lock_interruptible(&dev->struct_mutex);
 76	if (ret)
 77		goto free_priv;
 78
 79	pm_runtime_get_sync(&gpu->pdev->dev);
 80	show_priv->state = gpu->funcs->gpu_state_get(gpu);
 81	pm_runtime_put_sync(&gpu->pdev->dev);
 82
 83	mutex_unlock(&dev->struct_mutex);
 84
 85	if (IS_ERR(show_priv->state)) {
 86		ret = PTR_ERR(show_priv->state);
 87		goto free_priv;
 88	}
 89
 90	show_priv->dev = dev;
 91
 92	ret = single_open(file, msm_gpu_show, show_priv);
 93	if (ret)
 94		goto free_priv;
 95
 96	return 0;
 97
 98free_priv:
 99	kfree(show_priv);
100	return ret;
101}
102
103static const struct file_operations msm_gpu_fops = {
104	.owner = THIS_MODULE,
105	.open = msm_gpu_open,
106	.read = seq_read,
107	.llseek = seq_lseek,
108	.release = msm_gpu_release,
109};
110
111static unsigned long last_shrink_freed;
112
113static int
114shrink_get(void *data, u64 *val)
115{
116	*val = last_shrink_freed;
117
118	return 0;
119}
120
121static int
122shrink_set(void *data, u64 val)
123{
124	struct drm_device *dev = data;
125
126	last_shrink_freed = msm_gem_shrinker_shrink(dev, val);
127
128	return 0;
129}
130
131DEFINE_SIMPLE_ATTRIBUTE(shrink_fops,
132			shrink_get, shrink_set,
133			"0x%08llx\n");
134
135
136static int msm_gem_show(struct drm_device *dev, struct seq_file *m)
137{
138	struct msm_drm_private *priv = dev->dev_private;
139	int ret;
140
141	ret = mutex_lock_interruptible(&priv->obj_lock);
142	if (ret)
143		return ret;
144
145	msm_gem_describe_objects(&priv->objects, m);
146
147	mutex_unlock(&priv->obj_lock);
148
149	return 0;
150}
151
152static int msm_mm_show(struct drm_device *dev, struct seq_file *m)
153{
154	struct drm_printer p = drm_seq_file_printer(m);
155
156	drm_mm_print(&dev->vma_offset_manager->vm_addr_space_mm, &p);
157
158	return 0;
159}
160
161static int msm_fb_show(struct drm_device *dev, struct seq_file *m)
162{
163	struct msm_drm_private *priv = dev->dev_private;
164	struct drm_framebuffer *fb, *fbdev_fb = NULL;
165
166	if (priv->fbdev) {
167		seq_printf(m, "fbcon ");
168		fbdev_fb = priv->fbdev->fb;
169		msm_framebuffer_describe(fbdev_fb, m);
170	}
171
172	mutex_lock(&dev->mode_config.fb_lock);
173	list_for_each_entry(fb, &dev->mode_config.fb_list, head) {
174		if (fb == fbdev_fb)
175			continue;
176
177		seq_printf(m, "user ");
178		msm_framebuffer_describe(fb, m);
179	}
180	mutex_unlock(&dev->mode_config.fb_lock);
181
182	return 0;
183}
184
185static int show_locked(struct seq_file *m, void *arg)
186{
187	struct drm_info_node *node = (struct drm_info_node *) m->private;
188	struct drm_device *dev = node->minor->dev;
189	int (*show)(struct drm_device *dev, struct seq_file *m) =
190			node->info_ent->data;
191	int ret;
192
193	ret = mutex_lock_interruptible(&dev->struct_mutex);
194	if (ret)
195		return ret;
196
197	ret = show(dev, m);
198
199	mutex_unlock(&dev->struct_mutex);
200
201	return ret;
202}
203
204static struct drm_info_list msm_debugfs_list[] = {
205		{"gem", show_locked, 0, msm_gem_show},
206		{ "mm", show_locked, 0, msm_mm_show },
207		{ "fb", show_locked, 0, msm_fb_show },
208};
209
210static int late_init_minor(struct drm_minor *minor)
211{
212	int ret;
213
214	if (!minor)
215		return 0;
216
217	ret = msm_rd_debugfs_init(minor);
218	if (ret) {
219		DRM_DEV_ERROR(minor->dev->dev, "could not install rd debugfs\n");
220		return ret;
221	}
222
223	ret = msm_perf_debugfs_init(minor);
224	if (ret) {
225		DRM_DEV_ERROR(minor->dev->dev, "could not install perf debugfs\n");
226		return ret;
227	}
228
229	return 0;
230}
231
232int msm_debugfs_late_init(struct drm_device *dev)
233{
234	int ret;
235	ret = late_init_minor(dev->primary);
236	if (ret)
237		return ret;
238	ret = late_init_minor(dev->render);
239	return ret;
240}
241
242void msm_debugfs_init(struct drm_minor *minor)
243{
244	struct drm_device *dev = minor->dev;
245	struct msm_drm_private *priv = dev->dev_private;
246
247	drm_debugfs_create_files(msm_debugfs_list,
248				 ARRAY_SIZE(msm_debugfs_list),
249				 minor->debugfs_root, minor);
250
251	debugfs_create_file("gpu", S_IRUSR, minor->debugfs_root,
252		dev, &msm_gpu_fops);
253
254	debugfs_create_u32("hangcheck_period_ms", 0600, minor->debugfs_root,
255		&priv->hangcheck_period);
256
257	debugfs_create_file("shrink", S_IRWXU, minor->debugfs_root,
258		dev, &shrink_fops);
259
260	if (priv->kms && priv->kms->funcs->debugfs_init)
261		priv->kms->funcs->debugfs_init(priv->kms, minor);
262}
263#endif
264