From 76cb841cb886eef6b3bee341a2266c76578724ad Mon Sep 17 00:00:00 2001 From: Daniel Baumann Date: Mon, 6 May 2024 03:02:30 +0200 Subject: Adding upstream version 4.19.249. Signed-off-by: Daniel Baumann --- drivers/misc/mei/debugfs.c | 288 +++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 288 insertions(+) create mode 100644 drivers/misc/mei/debugfs.c (limited to 'drivers/misc/mei/debugfs.c') diff --git a/drivers/misc/mei/debugfs.c b/drivers/misc/mei/debugfs.c new file mode 100644 index 000000000..7b5df8fd6 --- /dev/null +++ b/drivers/misc/mei/debugfs.c @@ -0,0 +1,288 @@ +/* + * + * Intel Management Engine Interface (Intel MEI) Linux driver + * Copyright (c) 2012-2013, Intel Corporation. + * + * This program is free software; you can redistribute it and/or modify it + * under the terms and conditions of the GNU General Public License, + * version 2, as published by the Free Software Foundation. + * + * This program is distributed in the hope it will be useful, but WITHOUT + * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or + * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for + * more details. + * + */ +#include +#include +#include +#include + +#include + +#include "mei_dev.h" +#include "client.h" +#include "hw.h" + +static ssize_t mei_dbgfs_read_meclients(struct file *fp, char __user *ubuf, + size_t cnt, loff_t *ppos) +{ + struct mei_device *dev = fp->private_data; + struct mei_me_client *me_cl; + size_t bufsz = 1; + char *buf; + int i = 0; + int pos = 0; + int ret; + +#define HDR \ +" |id|fix| UUID |con|msg len|sb|refc|\n" + + down_read(&dev->me_clients_rwsem); + list_for_each_entry(me_cl, &dev->me_clients, list) + bufsz++; + + bufsz *= sizeof(HDR) + 1; + buf = kzalloc(bufsz, GFP_KERNEL); + if (!buf) { + up_read(&dev->me_clients_rwsem); + return -ENOMEM; + } + + pos += scnprintf(buf + pos, bufsz - pos, HDR); +#undef HDR + + /* 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)) { + pos += scnprintf(buf + pos, bufsz - pos, + "%2d|%2d|%3d|%pUl|%3d|%7d|%2d|%4d|\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)); + + mei_me_cl_put(me_cl); + } + } + +out: + up_read(&dev->me_clients_rwsem); + ret = simple_read_from_buffer(ubuf, cnt, ppos, buf, pos); + kfree(buf); + return ret; +} + +static const struct file_operations mei_dbgfs_fops_meclients = { + .open = simple_open, + .read = mei_dbgfs_read_meclients, + .llseek = generic_file_llseek, +}; + +static ssize_t mei_dbgfs_read_active(struct file *fp, char __user *ubuf, + size_t cnt, loff_t *ppos) +{ + struct mei_device *dev = fp->private_data; + struct mei_cl *cl; + size_t bufsz = 1; + char *buf; + int i = 0; + int pos = 0; + int ret; + +#define HDR " |me|host|state|rd|wr|wrq\n" + + if (!dev) + return -ENODEV; + + mutex_lock(&dev->device_lock); + + /* + * if the driver is not enabled the list won't be consistent, + * we output empty table + */ + if (dev->dev_state == MEI_DEV_ENABLED) + list_for_each_entry(cl, &dev->file_list, link) + bufsz++; + + bufsz *= sizeof(HDR) + 1; + + buf = kzalloc(bufsz, GFP_KERNEL); + if (!buf) { + mutex_unlock(&dev->device_lock); + return -ENOMEM; + } + + pos += scnprintf(buf + pos, bufsz - pos, HDR); +#undef HDR + + /* 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) { + + pos += scnprintf(buf + pos, bufsz - pos, + "%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); + ret = simple_read_from_buffer(ubuf, cnt, ppos, buf, pos); + kfree(buf); + return ret; +} + +static const struct file_operations mei_dbgfs_fops_active = { + .open = simple_open, + .read = mei_dbgfs_read_active, + .llseek = generic_file_llseek, +}; + +static ssize_t mei_dbgfs_read_devstate(struct file *fp, char __user *ubuf, + size_t cnt, loff_t *ppos) +{ + struct mei_device *dev = fp->private_data; + const size_t bufsz = 1024; + char *buf = kzalloc(bufsz, GFP_KERNEL); + int pos = 0; + int ret; + + if (!buf) + return -ENOMEM; + + pos += scnprintf(buf + pos, bufsz - pos, "dev: %s\n", + mei_dev_state_str(dev->dev_state)); + pos += scnprintf(buf + pos, bufsz - pos, "hbm: %s\n", + mei_hbm_state_str(dev->hbm_state)); + + if (dev->hbm_state >= MEI_HBM_ENUM_CLIENTS && + dev->hbm_state <= MEI_HBM_STARTED) { + pos += scnprintf(buf + pos, bufsz - pos, "hbm features:\n"); + pos += scnprintf(buf + pos, bufsz - pos, "\tPG: %01d\n", + dev->hbm_f_pg_supported); + pos += scnprintf(buf + pos, bufsz - pos, "\tDC: %01d\n", + dev->hbm_f_dc_supported); + pos += scnprintf(buf + pos, bufsz - pos, "\tIE: %01d\n", + dev->hbm_f_ie_supported); + pos += scnprintf(buf + pos, bufsz - pos, "\tDOT: %01d\n", + dev->hbm_f_dot_supported); + pos += scnprintf(buf + pos, bufsz - pos, "\tEV: %01d\n", + dev->hbm_f_ev_supported); + pos += scnprintf(buf + pos, bufsz - pos, "\tFA: %01d\n", + dev->hbm_f_fa_supported); + pos += scnprintf(buf + pos, bufsz - pos, "\tOS: %01d\n", + dev->hbm_f_os_supported); + pos += scnprintf(buf + pos, bufsz - pos, "\tDR: %01d\n", + dev->hbm_f_dr_supported); + } + + pos += scnprintf(buf + pos, bufsz - pos, "pg: %s, %s\n", + mei_pg_is_enabled(dev) ? "ENABLED" : "DISABLED", + mei_pg_state_str(mei_pg_state(dev))); + ret = simple_read_from_buffer(ubuf, cnt, ppos, buf, pos); + kfree(buf); + return ret; +} +static const struct file_operations mei_dbgfs_fops_devstate = { + .open = simple_open, + .read = mei_dbgfs_read_devstate, + .llseek = generic_file_llseek, +}; + +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_fops_allow_fa = { + .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 + * + * Return: 0 on success, <0 on failure. + */ +int mei_dbgfs_register(struct mei_device *dev, const char *name) +{ + struct dentry *dir, *f; + + dir = debugfs_create_dir(name, NULL); + if (!dir) + return -ENOMEM; + + dev->dbgfs_dir = dir; + + f = debugfs_create_file("meclients", S_IRUSR, dir, + dev, &mei_dbgfs_fops_meclients); + if (!f) { + dev_err(dev->dev, "meclients: registration failed\n"); + goto err; + } + f = debugfs_create_file("active", S_IRUSR, dir, + dev, &mei_dbgfs_fops_active); + if (!f) { + dev_err(dev->dev, "active: registration failed\n"); + goto err; + } + f = debugfs_create_file("devstate", S_IRUSR, dir, + dev, &mei_dbgfs_fops_devstate); + if (!f) { + dev_err(dev->dev, "devstate: registration failed\n"); + goto err; + } + f = debugfs_create_file("allow_fixed_address", S_IRUSR | S_IWUSR, dir, + &dev->allow_fixed_address, + &mei_dbgfs_fops_allow_fa); + if (!f) { + dev_err(dev->dev, "allow_fixed_address: registration failed\n"); + goto err; + } + return 0; +err: + mei_dbgfs_deregister(dev); + return -ENODEV; +} + -- cgit v1.2.3