Orange Pi5 kernel

// SPDX-License-Identifier: GPL-2.0
/*
 * Copyright (c) 2012-2016, 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 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, "pg:  %s, %s\n",
<------><------>   mei_pg_is_enabled(dev) ? "ENABLED" : "DISABLED",
<------><------>   mei_pg_state_str(mei_pg_state(dev)));
<------>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);
}