41 static int wait_sample(struct msm_perf_state *perf)  in wait_sample()  argument
45 	if (time_after(perf->next_jiffies, start_jiffies)) {  in wait_sample()
47 			perf->next_jiffies - start_jiffies;  in wait_sample()
54 	perf->next_jiffies += SAMPLE_TIME;  in wait_sample()
58 static int refill_buf(struct msm_perf_state *perf)  in refill_buf()  argument
60 	struct msm_drm_private *priv = perf->dev->dev_private;  in refill_buf()
62 	char *ptr = perf->buf;  in refill_buf()
63 	int rem = sizeof(perf->buf);  in refill_buf()
66 	if ((perf->cnt++ % 32) == 0) {  in refill_buf()
86 		ret = wait_sample(perf);  in refill_buf()
114 	perf->bufpos = 0;  in refill_buf()
115 	perf->buftot = ptr - perf->buf;  in refill_buf()
123 	struct msm_perf_state *perf = file->private_data;  in perf_read()  local
126 	mutex_lock(&perf->read_lock);  in perf_read()
128 	if (perf->bufpos >= perf->buftot) {  in perf_read()
129 		ret = refill_buf(perf);  in perf_read()
134 	n = min((int)sz, perf->buftot - perf->bufpos);  in perf_read()
135 	if (copy_to_user(buf, &perf->buf[perf->bufpos], n)) {  in perf_read()
140 	perf->bufpos += n;  in perf_read()
144 	mutex_unlock(&perf->read_lock);  in perf_read()
152 	struct msm_perf_state *perf = inode->i_private;  in perf_open()  local
153 	struct drm_device *dev = perf->dev;  in perf_open()
163 	if (perf->open) {  in perf_open()
168 	file->private_data = perf;  in perf_open()
169 	perf->open = true;  in perf_open()
170 	perf->cnt = 0;  in perf_open()
171 	perf->buftot = 0;  in perf_open()
172 	perf->bufpos = 0;  in perf_open()
174 	perf->next_jiffies = jiffies + SAMPLE_TIME;  in perf_open()
183 	struct msm_perf_state *perf = inode->i_private;  in perf_release()  local
184 	struct msm_drm_private *priv = perf->dev->dev_private;  in perf_release()
186 	perf->open = false;  in perf_release()
202 	struct msm_perf_state *perf;  in msm_perf_debugfs_init()  local
205 	if (priv->perf)  in msm_perf_debugfs_init()
208 	perf = kzalloc(sizeof(*perf), GFP_KERNEL);  in msm_perf_debugfs_init()
209 	if (!perf)  in msm_perf_debugfs_init()
212 	perf->dev = minor->dev;  in msm_perf_debugfs_init()
214 	mutex_init(&perf->read_lock);  in msm_perf_debugfs_init()
215 	priv->perf = perf;  in msm_perf_debugfs_init()
218 			    perf, &perf_debugfs_fops);  in msm_perf_debugfs_init()
224 	struct msm_perf_state *perf = priv->perf;  in msm_perf_debugfs_cleanup()  local
226 	if (!perf)  in msm_perf_debugfs_cleanup()
229 	priv->perf = NULL;  in msm_perf_debugfs_cleanup()
231 	mutex_destroy(&perf->read_lock);  in msm_perf_debugfs_cleanup()
233 	kfree(perf);  in msm_perf_debugfs_cleanup()