52 static int wait_sample(struct msm_perf_state *perf)  in wait_sample()  argument
56 	if (time_after(perf->next_jiffies, start_jiffies)) {  in wait_sample()
58 			perf->next_jiffies - start_jiffies;  in wait_sample()
65 	perf->next_jiffies += SAMPLE_TIME;  in wait_sample()
69 static int refill_buf(struct msm_perf_state *perf)  in refill_buf()  argument
71 	struct msm_drm_private *priv = perf->dev->dev_private;  in refill_buf()
73 	char *ptr = perf->buf;  in refill_buf()
74 	int rem = sizeof(perf->buf);  in refill_buf()
77 	if ((perf->cnt++ % 32) == 0) {  in refill_buf()
97 		ret = wait_sample(perf);  in refill_buf()
125 	perf->bufpos = 0;  in refill_buf()
126 	perf->buftot = ptr - perf->buf;  in refill_buf()
134 	struct msm_perf_state *perf = file->private_data;  in perf_read()  local
137 	mutex_lock(&perf->read_lock);  in perf_read()
139 	if (perf->bufpos >= perf->buftot) {  in perf_read()
140 		ret = refill_buf(perf);  in perf_read()
145 	n = min((int)sz, perf->buftot - perf->bufpos);  in perf_read()
146 	ret = copy_to_user(buf, &perf->buf[perf->bufpos], n);  in perf_read()
150 	perf->bufpos += n;  in perf_read()
154 	mutex_unlock(&perf->read_lock);  in perf_read()
162 	struct msm_perf_state *perf = inode->i_private;  in perf_open()  local
163 	struct drm_device *dev = perf->dev;  in perf_open()
170 	if (perf->open || !gpu) {  in perf_open()
175 	file->private_data = perf;  in perf_open()
176 	perf->open = true;  in perf_open()
177 	perf->cnt = 0;  in perf_open()
178 	perf->buftot = 0;  in perf_open()
179 	perf->bufpos = 0;  in perf_open()
181 	perf->next_jiffies = jiffies + SAMPLE_TIME;  in perf_open()
190 	struct msm_perf_state *perf = inode->i_private;  in perf_release()  local
191 	struct msm_drm_private *priv = perf->dev->dev_private;  in perf_release()
193 	perf->open = false;  in perf_release()
209 	struct msm_perf_state *perf;  in msm_perf_debugfs_init()  local
212 	if (priv->perf)  in msm_perf_debugfs_init()
215 	perf = kzalloc(sizeof(*perf), GFP_KERNEL);  in msm_perf_debugfs_init()
216 	if (!perf)  in msm_perf_debugfs_init()
219 	perf->dev = minor->dev;  in msm_perf_debugfs_init()
221 	mutex_init(&perf->read_lock);  in msm_perf_debugfs_init()
222 	priv->perf = perf;  in msm_perf_debugfs_init()
224 	perf->node = kzalloc(sizeof(*perf->node), GFP_KERNEL);  in msm_perf_debugfs_init()
225 	if (!perf->node)  in msm_perf_debugfs_init()
228 	perf->ent = debugfs_create_file("perf", S_IFREG | S_IRUGO,  in msm_perf_debugfs_init()
229 			minor->debugfs_root, perf, &perf_debugfs_fops);  in msm_perf_debugfs_init()
230 	if (!perf->ent) {  in msm_perf_debugfs_init()
236 	perf->node->minor = minor;  in msm_perf_debugfs_init()
237 	perf->node->dent  = perf->ent;  in msm_perf_debugfs_init()
238 	perf->node->info_ent = NULL;  in msm_perf_debugfs_init()
241 	list_add(&perf->node->list, &minor->debugfs_list);  in msm_perf_debugfs_init()
254 	struct msm_perf_state *perf = priv->perf;  in msm_perf_debugfs_cleanup()  local
256 	if (!perf)  in msm_perf_debugfs_cleanup()
259 	priv->perf = NULL;  in msm_perf_debugfs_cleanup()
261 	debugfs_remove(perf->ent);  in msm_perf_debugfs_cleanup()
263 	if (perf->node) {  in msm_perf_debugfs_cleanup()
265 		list_del(&perf->node->list);  in msm_perf_debugfs_cleanup()
267 		kfree(perf->node);  in msm_perf_debugfs_cleanup()
270 	mutex_destroy(&perf->read_lock);  in msm_perf_debugfs_cleanup()
272 	kfree(perf);  in msm_perf_debugfs_cleanup()