1 // SPDX-License-Identifier: GPL-2.0-only
20 #include "sof-client.h"
38 	struct sof_client_dev *cdev = inode->i_private;  in sof_ipc_flood_dfs_open()
42 		return -ENODEV;  in sof_ipc_flood_dfs_open()
44 	ret = debugfs_file_get(file->f_path.dentry);  in sof_ipc_flood_dfs_open()
50 		debugfs_file_put(file->f_path.dentry);  in sof_ipc_flood_dfs_open()
57  * or ipc_count, will be non-zero and will determine the type of test
64 	struct sof_ipc_flood_priv *priv = cdev->data;  in sof_debug_ipc_flood_test()
65 	struct device *dev = &cdev->auxdev.dev;  in sof_debug_ipc_flood_test()
122 	memset(priv->buf, 0, IPC_FLOOD_TEST_RESULT_LEN);  in sof_debug_ipc_flood_test()
126 		snprintf(priv->buf, IPC_FLOOD_TEST_RESULT_LEN,  in sof_debug_ipc_flood_test()
136 	snprintf(priv->buf + strlen(priv->buf),  in sof_debug_ipc_flood_test()
137 		 IPC_FLOOD_TEST_RESULT_LEN - strlen(priv->buf),  in sof_debug_ipc_flood_test()
141 	snprintf(priv->buf + strlen(priv->buf),  in sof_debug_ipc_flood_test()
142 		 IPC_FLOOD_TEST_RESULT_LEN - strlen(priv->buf),  in sof_debug_ipc_flood_test()
150  * Writing to the debugfs entry initiates the IPC flood test based on
156 	struct sof_client_dev *cdev = file->private_data;  in sof_ipc_flood_dfs_write()
157 	struct device *dev = &cdev->auxdev.dev;  in sof_ipc_flood_dfs_write()
167 		return -EINVAL;  in sof_ipc_flood_dfs_write()
171 		return -ENOMEM;  in sof_ipc_flood_dfs_write()
174 		ret = -EFAULT;  in sof_ipc_flood_dfs_write()
181 	 * ipc_flood_count floods the DSP with the number of IPC's specified.  in sof_ipc_flood_dfs_write()
182 	 * ipc_duration_ms test floods the DSP for the time specified  in sof_ipc_flood_dfs_write()
185 	dentry = file->f_path.dentry;  in sof_ipc_flood_dfs_write()
186 	if (strcmp(dentry->d_name.name, DEBUGFS_IPC_FLOOD_COUNT) &&  in sof_ipc_flood_dfs_write()
187 	    strcmp(dentry->d_name.name, DEBUGFS_IPC_FLOOD_DURATION)) {  in sof_ipc_flood_dfs_write()
188 		ret = -EINVAL;  in sof_ipc_flood_dfs_write()
192 	if (!strcmp(dentry->d_name.name, DEBUGFS_IPC_FLOOD_DURATION))  in sof_ipc_flood_dfs_write()
225 	if (ret < 0 && ret != -EACCES) {  in sof_ipc_flood_dfs_write()
251 	struct sof_client_dev *cdev = file->private_data;  in sof_ipc_flood_dfs_read()
252 	struct sof_ipc_flood_priv *priv = cdev->data;  in sof_ipc_flood_dfs_read()
257 	dentry = file->f_path.dentry;  in sof_ipc_flood_dfs_read()
258 	if (!strcmp(dentry->d_name.name, DEBUGFS_IPC_FLOOD_COUNT) ||  in sof_ipc_flood_dfs_read()
259 	    !strcmp(dentry->d_name.name, DEBUGFS_IPC_FLOOD_DURATION)) {  in sof_ipc_flood_dfs_read()
263 		count = min_t(size_t, count, strlen(priv->buf));  in sof_ipc_flood_dfs_read()
264 		size_ret = copy_to_user(buffer, priv->buf, count);  in sof_ipc_flood_dfs_read()
266 			return -EFAULT;  in sof_ipc_flood_dfs_read()
276 	debugfs_file_put(file->f_path.dentry);  in sof_ipc_flood_dfs_release()
294  * by specifying either the number of IPCs to flood the DSP with or the duration
295  * (in ms) for which the DSP should be flooded with test IPCs. At the
305 	struct device *dev = &auxdev->dev;  in sof_ipc_flood_probe()
311 		return -ENOMEM;  in sof_ipc_flood_probe()
313 	priv->buf = devm_kmalloc(dev, IPC_FLOOD_TEST_RESULT_LEN, GFP_KERNEL);  in sof_ipc_flood_probe()
314 	if (!priv->buf)  in sof_ipc_flood_probe()
315 		return -ENOMEM;  in sof_ipc_flood_probe()
317 	cdev->data = priv;  in sof_ipc_flood_probe()
320 	priv->dfs_root = debugfs_create_dir(dev_name(dev), debugfs_root);  in sof_ipc_flood_probe()
321 	if (!IS_ERR_OR_NULL(priv->dfs_root)) {  in sof_ipc_flood_probe()
322 		/* create read-write ipc_flood_count debugfs entry */  in sof_ipc_flood_probe()
323 		debugfs_create_file(DEBUGFS_IPC_FLOOD_COUNT, 0644, priv->dfs_root,  in sof_ipc_flood_probe()
326 		/* create read-write ipc_flood_duration_ms debugfs entry */  in sof_ipc_flood_probe()
328 				    priv->dfs_root, cdev, &sof_ipc_flood_fops);  in sof_ipc_flood_probe()
330 		if (auxdev->id == 0) {  in sof_ipc_flood_probe()
339 			priv->dfs_link[0] =  in sof_ipc_flood_probe()
345 			priv->dfs_link[1] =  in sof_ipc_flood_probe()
364 	struct sof_ipc_flood_priv *priv = cdev->data;  in sof_ipc_flood_remove()
366 	pm_runtime_disable(&auxdev->dev);  in sof_ipc_flood_remove()
368 	if (auxdev->id == 0) {  in sof_ipc_flood_remove()
369 		debugfs_remove(priv->dfs_link[0]);  in sof_ipc_flood_remove()
370 		debugfs_remove(priv->dfs_link[1]);  in sof_ipc_flood_remove()
373 	debugfs_remove_recursive(priv->dfs_root);  in sof_ipc_flood_remove()
384  * type are enough to ensure that the parent SOF device resumes to bring the DSP
386  * Driver name will be set based on KBUILD_MODNAME.