// SPDX-License-Identifier: GPL-2.0/* * Copyright (c) 2012-2022, Intel Corporation. All rights reserved * Intel Management Engine Interface (Intel MEI) Linux driver */ #include <linux/slab.h>#include <linux/kernel.h>#include <linux/device.h>#include <linux/debugfs.h>#include <linux/seq_file.h> #include <linux/mei.h> #include "mei_dev.h"#include "client.h"#include "hw.h" static int mei_dbgfs_meclients_show(struct seq_file *m, void *unused){	struct mei_device *dev = m->private;	struct mei_me_client *me_cl;	int i = 0; 	if (!dev)		return -ENODEV; 	down_read(&dev->me_clients_rwsem); 	seq_puts(m, "  |id|fix|         UUID                       |con|msg len|sb|refc|vt|\n"); 	/*  if the driver is not enabled the list won't be consistent */	if (dev->dev_state != MEI_DEV_ENABLED)		goto out; 	list_for_each_entry(me_cl, &dev->me_clients, list) {		if (!mei_me_cl_get(me_cl))			continue; 		seq_printf(m, "%2d|%2d|%3d|%pUl|%3d|%7d|%2d|%4d|%2d|\n",			   i++, me_cl->client_id,			   me_cl->props.fixed_address,			   &me_cl->props.protocol_name,			   me_cl->props.max_number_of_connections,			   me_cl->props.max_msg_length,			   me_cl->props.single_recv_buf,			   kref_read(&me_cl->refcnt),			   me_cl->props.vt_supported);		mei_me_cl_put(me_cl);	} out:	up_read(&dev->me_clients_rwsem);	return 0;}DEFINE_SHOW_ATTRIBUTE(mei_dbgfs_meclients); static int mei_dbgfs_active_show(struct seq_file *m, void *unused){	struct mei_device *dev = m->private;	struct mei_cl *cl;	int i = 0; 	if (!dev)		return -ENODEV; 	mutex_lock(&dev->device_lock); 	seq_puts(m, "   |me|host|state|rd|wr|wrq\n"); 	/*  if the driver is not enabled the list won't be consistent */	if (dev->dev_state != MEI_DEV_ENABLED)		goto out; 	list_for_each_entry(cl, &dev->file_list, link) { 		seq_printf(m, "%3d|%2d|%4d|%5d|%2d|%2d|%3u\n",			   i, mei_cl_me_id(cl), cl->host_client_id, cl->state,			   !list_empty(&cl->rd_completed), cl->writing_state,			   cl->tx_cb_queued);		i++;	}out:	mutex_unlock(&dev->device_lock);	return 0;}DEFINE_SHOW_ATTRIBUTE(mei_dbgfs_active); static const char *mei_dev_pxp_mode_str(enum mei_dev_pxp_mode state){#define MEI_PXP_MODE(state) case MEI_DEV_PXP_##state: return #state	switch (state) {	MEI_PXP_MODE(DEFAULT);	MEI_PXP_MODE(INIT);	MEI_PXP_MODE(SETUP);	MEI_PXP_MODE(READY);	default:		return "unknown";	}#undef MEI_PXP_MODE} static int mei_dbgfs_devstate_show(struct seq_file *m, void *unused){	struct mei_device *dev = m->private; 	seq_printf(m, "dev: %s\n", mei_dev_state_str(dev->dev_state));	seq_printf(m, "hbm: %s\n", mei_hbm_state_str(dev->hbm_state)); 	if (dev->hbm_state >= MEI_HBM_ENUM_CLIENTS &&	    dev->hbm_state <= MEI_HBM_STARTED) {		seq_puts(m, "hbm features:\n");		seq_printf(m, "\tPG: %01d\n", dev->hbm_f_pg_supported);		seq_printf(m, "\tDC: %01d\n", dev->hbm_f_dc_supported);		seq_printf(m, "\tIE: %01d\n", dev->hbm_f_ie_supported);		seq_printf(m, "\tDOT: %01d\n", dev->hbm_f_dot_supported);		seq_printf(m, "\tEV: %01d\n", dev->hbm_f_ev_supported);		seq_printf(m, "\tFA: %01d\n", dev->hbm_f_fa_supported);		seq_printf(m, "\tOS: %01d\n", dev->hbm_f_os_supported);		seq_printf(m, "\tDR: %01d\n", dev->hbm_f_dr_supported);		seq_printf(m, "\tVT: %01d\n", dev->hbm_f_vt_supported);		seq_printf(m, "\tCAP: %01d\n", dev->hbm_f_cap_supported);		seq_printf(m, "\tCD: %01d\n", dev->hbm_f_cd_supported);	} 	seq_printf(m, "pg:  %s, %s\n",		   mei_pg_is_enabled(dev) ? "ENABLED" : "DISABLED",		   mei_pg_state_str(mei_pg_state(dev))); 	seq_printf(m, "pxp: %s\n", mei_dev_pxp_mode_str(dev->pxp_mode)); 	return 0;}DEFINE_SHOW_ATTRIBUTE(mei_dbgfs_devstate); static ssize_t mei_dbgfs_write_allow_fa(struct file *file,					const char __user *user_buf,					size_t count, loff_t *ppos){	struct mei_device *dev;	int ret; 	dev = container_of(file->private_data,			   struct mei_device, allow_fixed_address); 	ret = debugfs_write_file_bool(file, user_buf, count, ppos);	if (ret < 0)		return ret;	dev->override_fixed_address = true;	return ret;} static const struct file_operations mei_dbgfs_allow_fa_fops = {	.open = simple_open,	.read = debugfs_read_file_bool,	.write = mei_dbgfs_write_allow_fa,	.llseek = generic_file_llseek,}; /** * mei_dbgfs_deregister - Remove the debugfs files and directories * * @dev: the mei device structure */void mei_dbgfs_deregister(struct mei_device *dev){	if (!dev->dbgfs_dir)		return;	debugfs_remove_recursive(dev->dbgfs_dir);	dev->dbgfs_dir = NULL;} /** * mei_dbgfs_register - Add the debugfs files * * @dev: the mei device structure * @name: the mei device name */void mei_dbgfs_register(struct mei_device *dev, const char *name){	struct dentry *dir; 	dir = debugfs_create_dir(name, NULL);	dev->dbgfs_dir = dir; 	debugfs_create_file("meclients", S_IRUSR, dir, dev,			    &mei_dbgfs_meclients_fops);	debugfs_create_file("active", S_IRUSR, dir, dev,			    &mei_dbgfs_active_fops);	debugfs_create_file("devstate", S_IRUSR, dir, dev,			    &mei_dbgfs_devstate_fops);	debugfs_create_file("allow_fixed_address", S_IRUSR | S_IWUSR, dir,			    &dev->allow_fixed_address,			    &mei_dbgfs_allow_fa_fops);}