284 lines
7.0 KiB
C
284 lines
7.0 KiB
C
/*
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*
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* Intel Management Engine Interface (Intel MEI) Linux driver
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* Copyright (c) 2012-2013, Intel Corporation.
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms and conditions of the GNU General Public License,
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* version 2, as published by the Free Software Foundation.
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*
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* This program is distributed in the hope it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
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* more details.
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*
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*/
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#include <linux/slab.h>
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#include <linux/kernel.h>
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#include <linux/device.h>
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#include <linux/debugfs.h>
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#include <linux/mei.h>
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#include "mei_dev.h"
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#include "client.h"
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#include "hw.h"
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static ssize_t mei_dbgfs_read_meclients(struct file *fp, char __user *ubuf,
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size_t cnt, loff_t *ppos)
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{
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struct mei_device *dev = fp->private_data;
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struct mei_me_client *me_cl;
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size_t bufsz = 1;
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char *buf;
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int i = 0;
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int pos = 0;
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int ret;
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#define HDR \
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" |id|fix| UUID |con|msg len|sb|refc|\n"
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down_read(&dev->me_clients_rwsem);
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list_for_each_entry(me_cl, &dev->me_clients, list)
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bufsz++;
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bufsz *= sizeof(HDR) + 1;
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buf = kzalloc(bufsz, GFP_KERNEL);
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if (!buf) {
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up_read(&dev->me_clients_rwsem);
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return -ENOMEM;
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}
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pos += scnprintf(buf + pos, bufsz - pos, HDR);
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#undef HDR
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/* if the driver is not enabled the list won't be consistent */
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if (dev->dev_state != MEI_DEV_ENABLED)
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goto out;
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list_for_each_entry(me_cl, &dev->me_clients, list) {
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if (mei_me_cl_get(me_cl)) {
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pos += scnprintf(buf + pos, bufsz - pos,
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"%2d|%2d|%3d|%pUl|%3d|%7d|%2d|%4d|\n",
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i++, me_cl->client_id,
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me_cl->props.fixed_address,
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&me_cl->props.protocol_name,
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me_cl->props.max_number_of_connections,
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me_cl->props.max_msg_length,
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me_cl->props.single_recv_buf,
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atomic_read(&me_cl->refcnt.refcount));
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mei_me_cl_put(me_cl);
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}
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}
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out:
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up_read(&dev->me_clients_rwsem);
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ret = simple_read_from_buffer(ubuf, cnt, ppos, buf, pos);
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kfree(buf);
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return ret;
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}
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static const struct file_operations mei_dbgfs_fops_meclients = {
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.open = simple_open,
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.read = mei_dbgfs_read_meclients,
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.llseek = generic_file_llseek,
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};
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static ssize_t mei_dbgfs_read_active(struct file *fp, char __user *ubuf,
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size_t cnt, loff_t *ppos)
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{
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struct mei_device *dev = fp->private_data;
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struct mei_cl *cl;
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size_t bufsz = 1;
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char *buf;
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int i = 0;
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int pos = 0;
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int ret;
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#define HDR " |me|host|state|rd|wr|\n"
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if (!dev)
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return -ENODEV;
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mutex_lock(&dev->device_lock);
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/*
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* if the driver is not enabled the list won't be consistent,
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* we output empty table
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*/
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if (dev->dev_state == MEI_DEV_ENABLED)
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list_for_each_entry(cl, &dev->file_list, link)
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bufsz++;
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bufsz *= sizeof(HDR) + 1;
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buf = kzalloc(bufsz, GFP_KERNEL);
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if (!buf) {
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mutex_unlock(&dev->device_lock);
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return -ENOMEM;
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}
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pos += scnprintf(buf + pos, bufsz - pos, HDR);
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#undef HDR
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/* if the driver is not enabled the list won't be consistent */
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if (dev->dev_state != MEI_DEV_ENABLED)
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goto out;
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list_for_each_entry(cl, &dev->file_list, link) {
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pos += scnprintf(buf + pos, bufsz - pos,
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"%3d|%2d|%4d|%5d|%2d|%2d|\n",
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i, mei_cl_me_id(cl), cl->host_client_id, cl->state,
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!list_empty(&cl->rd_completed), cl->writing_state);
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i++;
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}
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out:
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mutex_unlock(&dev->device_lock);
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ret = simple_read_from_buffer(ubuf, cnt, ppos, buf, pos);
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kfree(buf);
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return ret;
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}
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static const struct file_operations mei_dbgfs_fops_active = {
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.open = simple_open,
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.read = mei_dbgfs_read_active,
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.llseek = generic_file_llseek,
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};
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static ssize_t mei_dbgfs_read_devstate(struct file *fp, char __user *ubuf,
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size_t cnt, loff_t *ppos)
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{
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struct mei_device *dev = fp->private_data;
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const size_t bufsz = 1024;
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char *buf = kzalloc(bufsz, GFP_KERNEL);
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int pos = 0;
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int ret;
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if (!buf)
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return -ENOMEM;
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pos += scnprintf(buf + pos, bufsz - pos, "dev: %s\n",
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mei_dev_state_str(dev->dev_state));
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pos += scnprintf(buf + pos, bufsz - pos, "hbm: %s\n",
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mei_hbm_state_str(dev->hbm_state));
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if (dev->hbm_state >= MEI_HBM_ENUM_CLIENTS &&
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dev->hbm_state <= MEI_HBM_STARTED) {
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pos += scnprintf(buf + pos, bufsz - pos, "hbm features:\n");
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pos += scnprintf(buf + pos, bufsz - pos, "\tPG: %01d\n",
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dev->hbm_f_pg_supported);
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pos += scnprintf(buf + pos, bufsz - pos, "\tDC: %01d\n",
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dev->hbm_f_dc_supported);
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pos += scnprintf(buf + pos, bufsz - pos, "\tIE: %01d\n",
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dev->hbm_f_ie_supported);
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pos += scnprintf(buf + pos, bufsz - pos, "\tDOT: %01d\n",
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dev->hbm_f_dot_supported);
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pos += scnprintf(buf + pos, bufsz - pos, "\tEV: %01d\n",
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dev->hbm_f_ev_supported);
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pos += scnprintf(buf + pos, bufsz - pos, "\tFA: %01d\n",
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dev->hbm_f_fa_supported);
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}
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pos += scnprintf(buf + pos, bufsz - pos, "pg: %s, %s\n",
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mei_pg_is_enabled(dev) ? "ENABLED" : "DISABLED",
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mei_pg_state_str(mei_pg_state(dev)));
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ret = simple_read_from_buffer(ubuf, cnt, ppos, buf, pos);
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kfree(buf);
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return ret;
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}
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static const struct file_operations mei_dbgfs_fops_devstate = {
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.open = simple_open,
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.read = mei_dbgfs_read_devstate,
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.llseek = generic_file_llseek,
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};
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static ssize_t mei_dbgfs_write_allow_fa(struct file *file,
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const char __user *user_buf,
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size_t count, loff_t *ppos)
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{
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struct mei_device *dev;
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int ret;
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dev = container_of(file->private_data,
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struct mei_device, allow_fixed_address);
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ret = debugfs_write_file_bool(file, user_buf, count, ppos);
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if (ret < 0)
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return ret;
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dev->override_fixed_address = true;
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return ret;
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}
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static const struct file_operations mei_dbgfs_fops_allow_fa = {
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.open = simple_open,
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.read = debugfs_read_file_bool,
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.write = mei_dbgfs_write_allow_fa,
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.llseek = generic_file_llseek,
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};
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/**
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* mei_dbgfs_deregister - Remove the debugfs files and directories
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*
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* @dev: the mei device structure
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*/
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void mei_dbgfs_deregister(struct mei_device *dev)
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{
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if (!dev->dbgfs_dir)
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return;
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debugfs_remove_recursive(dev->dbgfs_dir);
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dev->dbgfs_dir = NULL;
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}
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/**
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* mei_dbgfs_register - Add the debugfs files
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*
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* @dev: the mei device structure
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* @name: the mei device name
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*
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* Return: 0 on success, <0 on failure.
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*/
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int mei_dbgfs_register(struct mei_device *dev, const char *name)
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{
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struct dentry *dir, *f;
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dir = debugfs_create_dir(name, NULL);
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if (!dir)
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return -ENOMEM;
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dev->dbgfs_dir = dir;
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f = debugfs_create_file("meclients", S_IRUSR, dir,
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dev, &mei_dbgfs_fops_meclients);
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if (!f) {
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dev_err(dev->dev, "meclients: registration failed\n");
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goto err;
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}
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f = debugfs_create_file("active", S_IRUSR, dir,
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dev, &mei_dbgfs_fops_active);
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if (!f) {
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dev_err(dev->dev, "active: registration failed\n");
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goto err;
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}
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f = debugfs_create_file("devstate", S_IRUSR, dir,
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dev, &mei_dbgfs_fops_devstate);
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if (!f) {
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dev_err(dev->dev, "devstate: registration failed\n");
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goto err;
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}
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f = debugfs_create_file("allow_fixed_address", S_IRUSR | S_IWUSR, dir,
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&dev->allow_fixed_address,
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&mei_dbgfs_fops_allow_fa);
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if (!f) {
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dev_err(dev->dev, "allow_fixed_address: registration failed\n");
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goto err;
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}
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return 0;
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err:
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mei_dbgfs_deregister(dev);
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return -ENODEV;
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}
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