1231 строка
30 KiB
C
1231 строка
30 KiB
C
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/*
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*
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* Intel Management Engine Interface (Intel MEI) Linux driver
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* Copyright (c) 2003-2012, 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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#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
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#include <linux/module.h>
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#include <linux/moduleparam.h>
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#include <linux/kernel.h>
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#include <linux/device.h>
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#include <linux/fs.h>
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#include <linux/errno.h>
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#include <linux/types.h>
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#include <linux/fcntl.h>
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#include <linux/aio.h>
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#include <linux/pci.h>
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#include <linux/poll.h>
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#include <linux/init.h>
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#include <linux/ioctl.h>
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#include <linux/cdev.h>
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#include <linux/sched.h>
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#include <linux/uuid.h>
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#include <linux/compat.h>
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#include <linux/jiffies.h>
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#include <linux/interrupt.h>
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#include <linux/miscdevice.h>
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#include "mei_dev.h"
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#include "mei.h"
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#include "interface.h"
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static const char mei_driver_name[] = "mei";
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/* The device pointer */
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/* Currently this driver works as long as there is only a single AMT device. */
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struct pci_dev *mei_device;
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/* mei_pci_tbl - PCI Device ID Table */
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static DEFINE_PCI_DEVICE_TABLE(mei_pci_tbl) = {
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{PCI_DEVICE(PCI_VENDOR_ID_INTEL, MEI_DEV_ID_82946GZ)},
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{PCI_DEVICE(PCI_VENDOR_ID_INTEL, MEI_DEV_ID_82G35)},
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{PCI_DEVICE(PCI_VENDOR_ID_INTEL, MEI_DEV_ID_82Q965)},
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{PCI_DEVICE(PCI_VENDOR_ID_INTEL, MEI_DEV_ID_82G965)},
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{PCI_DEVICE(PCI_VENDOR_ID_INTEL, MEI_DEV_ID_82GM965)},
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{PCI_DEVICE(PCI_VENDOR_ID_INTEL, MEI_DEV_ID_82GME965)},
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{PCI_DEVICE(PCI_VENDOR_ID_INTEL, MEI_DEV_ID_ICH9_82Q35)},
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{PCI_DEVICE(PCI_VENDOR_ID_INTEL, MEI_DEV_ID_ICH9_82G33)},
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{PCI_DEVICE(PCI_VENDOR_ID_INTEL, MEI_DEV_ID_ICH9_82Q33)},
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{PCI_DEVICE(PCI_VENDOR_ID_INTEL, MEI_DEV_ID_ICH9_82X38)},
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{PCI_DEVICE(PCI_VENDOR_ID_INTEL, MEI_DEV_ID_ICH9_3200)},
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{PCI_DEVICE(PCI_VENDOR_ID_INTEL, MEI_DEV_ID_ICH9_6)},
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{PCI_DEVICE(PCI_VENDOR_ID_INTEL, MEI_DEV_ID_ICH9_7)},
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{PCI_DEVICE(PCI_VENDOR_ID_INTEL, MEI_DEV_ID_ICH9_8)},
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{PCI_DEVICE(PCI_VENDOR_ID_INTEL, MEI_DEV_ID_ICH9_9)},
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{PCI_DEVICE(PCI_VENDOR_ID_INTEL, MEI_DEV_ID_ICH9_10)},
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{PCI_DEVICE(PCI_VENDOR_ID_INTEL, MEI_DEV_ID_ICH9M_1)},
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{PCI_DEVICE(PCI_VENDOR_ID_INTEL, MEI_DEV_ID_ICH9M_2)},
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{PCI_DEVICE(PCI_VENDOR_ID_INTEL, MEI_DEV_ID_ICH9M_3)},
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{PCI_DEVICE(PCI_VENDOR_ID_INTEL, MEI_DEV_ID_ICH9M_4)},
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{PCI_DEVICE(PCI_VENDOR_ID_INTEL, MEI_DEV_ID_ICH10_1)},
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{PCI_DEVICE(PCI_VENDOR_ID_INTEL, MEI_DEV_ID_ICH10_2)},
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{PCI_DEVICE(PCI_VENDOR_ID_INTEL, MEI_DEV_ID_ICH10_3)},
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{PCI_DEVICE(PCI_VENDOR_ID_INTEL, MEI_DEV_ID_ICH10_4)},
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{PCI_DEVICE(PCI_VENDOR_ID_INTEL, MEI_DEV_ID_IBXPK_1)},
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{PCI_DEVICE(PCI_VENDOR_ID_INTEL, MEI_DEV_ID_IBXPK_2)},
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{PCI_DEVICE(PCI_VENDOR_ID_INTEL, MEI_DEV_ID_CPT_1)},
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{PCI_DEVICE(PCI_VENDOR_ID_INTEL, MEI_DEV_ID_PBG_1)},
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{PCI_DEVICE(PCI_VENDOR_ID_INTEL, MEI_DEV_ID_PPT_1)},
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{PCI_DEVICE(PCI_VENDOR_ID_INTEL, MEI_DEV_ID_PPT_2)},
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{PCI_DEVICE(PCI_VENDOR_ID_INTEL, MEI_DEV_ID_PPT_3)},
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/* required last entry */
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{0, }
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};
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MODULE_DEVICE_TABLE(pci, mei_pci_tbl);
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static DEFINE_MUTEX(mei_mutex);
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/**
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* mei_clear_list - removes all callbacks associated with file
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* from mei_cb_list
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*
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* @dev: device structure.
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* @file: file structure
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* @mei_cb_list: callbacks list
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*
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* mei_clear_list is called to clear resources associated with file
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* when application calls close function or Ctrl-C was pressed
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*
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* returns true if callback removed from the list, false otherwise
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*/
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static bool mei_clear_list(struct mei_device *dev,
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struct file *file, struct list_head *mei_cb_list)
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{
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struct mei_cl_cb *cb_pos = NULL;
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struct mei_cl_cb *cb_next = NULL;
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struct file *file_temp;
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bool removed = false;
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/* list all list member */
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list_for_each_entry_safe(cb_pos, cb_next, mei_cb_list, cb_list) {
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file_temp = (struct file *)cb_pos->file_object;
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/* check if list member associated with a file */
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if (file_temp == file) {
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/* remove member from the list */
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list_del(&cb_pos->cb_list);
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/* check if cb equal to current iamthif cb */
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if (dev->iamthif_current_cb == cb_pos) {
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dev->iamthif_current_cb = NULL;
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/* send flow control to iamthif client */
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mei_send_flow_control(dev, &dev->iamthif_cl);
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}
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/* free all allocated buffers */
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mei_free_cb_private(cb_pos);
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cb_pos = NULL;
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removed = true;
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}
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}
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return removed;
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}
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/**
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* mei_clear_lists - removes all callbacks associated with file
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*
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* @dev: device structure
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* @file: file structure
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*
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* mei_clear_lists is called to clear resources associated with file
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* when application calls close function or Ctrl-C was pressed
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*
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* returns true if callback removed from the list, false otherwise
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*/
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static bool mei_clear_lists(struct mei_device *dev, struct file *file)
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{
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bool removed = false;
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/* remove callbacks associated with a file */
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mei_clear_list(dev, file, &dev->amthi_cmd_list.mei_cb.cb_list);
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if (mei_clear_list(dev, file,
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&dev->amthi_read_complete_list.mei_cb.cb_list))
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removed = true;
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mei_clear_list(dev, file, &dev->ctrl_rd_list.mei_cb.cb_list);
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if (mei_clear_list(dev, file, &dev->ctrl_wr_list.mei_cb.cb_list))
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removed = true;
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if (mei_clear_list(dev, file, &dev->write_waiting_list.mei_cb.cb_list))
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removed = true;
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if (mei_clear_list(dev, file, &dev->write_list.mei_cb.cb_list))
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removed = true;
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/* check if iamthif_current_cb not NULL */
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if (dev->iamthif_current_cb && !removed) {
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/* check file and iamthif current cb association */
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if (dev->iamthif_current_cb->file_object == file) {
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/* remove cb */
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mei_free_cb_private(dev->iamthif_current_cb);
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dev->iamthif_current_cb = NULL;
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removed = true;
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}
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}
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return removed;
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}
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/**
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* find_read_list_entry - find read list entry
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*
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* @dev: device structure
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* @file: pointer to file structure
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*
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* returns cb on success, NULL on error
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*/
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static struct mei_cl_cb *find_read_list_entry(
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struct mei_device *dev,
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struct mei_cl *cl)
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{
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struct mei_cl_cb *pos = NULL;
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struct mei_cl_cb *next = NULL;
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dev_dbg(&dev->pdev->dev, "remove read_list CB\n");
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list_for_each_entry_safe(pos, next,
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&dev->read_list.mei_cb.cb_list, cb_list) {
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struct mei_cl *cl_temp;
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cl_temp = (struct mei_cl *)pos->file_private;
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if (mei_cl_cmp_id(cl, cl_temp))
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return pos;
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}
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return NULL;
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}
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/**
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* mei_open - the open function
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*
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* @inode: pointer to inode structure
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* @file: pointer to file structure
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*
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* returns 0 on success, <0 on error
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*/
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static int mei_open(struct inode *inode, struct file *file)
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{
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struct mei_cl *cl;
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struct mei_device *dev;
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unsigned long cl_id;
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int err;
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err = -ENODEV;
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if (!mei_device)
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goto out;
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dev = pci_get_drvdata(mei_device);
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if (!dev)
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goto out;
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mutex_lock(&dev->device_lock);
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err = -ENOMEM;
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cl = mei_cl_allocate(dev);
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if (!cl)
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goto out_unlock;
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err = -ENODEV;
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if (dev->mei_state != MEI_ENABLED) {
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dev_dbg(&dev->pdev->dev, "mei_state != MEI_ENABLED mei_state= %d\n",
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dev->mei_state);
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goto out_unlock;
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}
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err = -EMFILE;
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if (dev->open_handle_count >= MEI_MAX_OPEN_HANDLE_COUNT)
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goto out_unlock;
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cl_id = find_first_zero_bit(dev->host_clients_map, MEI_CLIENTS_MAX);
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if (cl_id >= MEI_CLIENTS_MAX)
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goto out_unlock;
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cl->host_client_id = cl_id;
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dev_dbg(&dev->pdev->dev, "client_id = %d\n", cl->host_client_id);
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dev->open_handle_count++;
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list_add_tail(&cl->link, &dev->file_list);
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set_bit(cl->host_client_id, dev->host_clients_map);
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cl->state = MEI_FILE_INITIALIZING;
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cl->sm_state = 0;
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file->private_data = cl;
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mutex_unlock(&dev->device_lock);
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return nonseekable_open(inode, file);
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out_unlock:
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mutex_unlock(&dev->device_lock);
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kfree(cl);
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out:
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return err;
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}
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/**
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* mei_release - the release function
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*
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* @inode: pointer to inode structure
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* @file: pointer to file structure
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*
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* returns 0 on success, <0 on error
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*/
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static int mei_release(struct inode *inode, struct file *file)
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{
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struct mei_cl *cl = file->private_data;
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struct mei_cl_cb *cb;
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struct mei_device *dev;
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int rets = 0;
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if (WARN_ON(!cl || !cl->dev))
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return -ENODEV;
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dev = cl->dev;
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mutex_lock(&dev->device_lock);
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if (cl != &dev->iamthif_cl) {
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if (cl->state == MEI_FILE_CONNECTED) {
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cl->state = MEI_FILE_DISCONNECTING;
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dev_dbg(&dev->pdev->dev,
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"disconnecting client host client = %d, "
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"ME client = %d\n",
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cl->host_client_id,
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cl->me_client_id);
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rets = mei_disconnect_host_client(dev, cl);
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}
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mei_cl_flush_queues(cl);
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dev_dbg(&dev->pdev->dev, "remove client host client = %d, ME client = %d\n",
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cl->host_client_id,
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cl->me_client_id);
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if (dev->open_handle_count > 0) {
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clear_bit(cl->host_client_id, dev->host_clients_map);
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dev->open_handle_count--;
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}
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mei_remove_client_from_file_list(dev, cl->host_client_id);
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/* free read cb */
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cb = NULL;
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if (cl->read_cb) {
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cb = find_read_list_entry(dev, cl);
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/* Remove entry from read list */
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if (cb)
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list_del(&cb->cb_list);
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cb = cl->read_cb;
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cl->read_cb = NULL;
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}
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file->private_data = NULL;
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if (cb) {
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mei_free_cb_private(cb);
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cb = NULL;
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}
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kfree(cl);
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} else {
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if (dev->open_handle_count > 0)
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dev->open_handle_count--;
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if (dev->iamthif_file_object == file &&
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dev->iamthif_state != MEI_IAMTHIF_IDLE) {
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dev_dbg(&dev->pdev->dev, "amthi canceled iamthif state %d\n",
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dev->iamthif_state);
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dev->iamthif_canceled = true;
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if (dev->iamthif_state == MEI_IAMTHIF_READ_COMPLETE) {
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dev_dbg(&dev->pdev->dev, "run next amthi iamthif cb\n");
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mei_run_next_iamthif_cmd(dev);
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}
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}
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|
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if (mei_clear_lists(dev, file))
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dev->iamthif_state = MEI_IAMTHIF_IDLE;
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|
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}
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mutex_unlock(&dev->device_lock);
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return rets;
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}
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/**
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* mei_read - the read function.
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*
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* @file: pointer to file structure
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* @ubuf: pointer to user buffer
|
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* @length: buffer length
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* @offset: data offset in buffer
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*
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* returns >=0 data length on success , <0 on error
|
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*/
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static ssize_t mei_read(struct file *file, char __user *ubuf,
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size_t length, loff_t *offset)
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{
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struct mei_cl *cl = file->private_data;
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struct mei_cl_cb *cb_pos = NULL;
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struct mei_cl_cb *cb = NULL;
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struct mei_device *dev;
|
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int i;
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int rets;
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int err;
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|
|
||
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|
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if (WARN_ON(!cl || !cl->dev))
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return -ENODEV;
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|
|
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dev = cl->dev;
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|
|
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mutex_lock(&dev->device_lock);
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if (dev->mei_state != MEI_ENABLED) {
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rets = -ENODEV;
|
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goto out;
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}
|
||
|
|
||
|
if ((cl->sm_state & MEI_WD_STATE_INDEPENDENCE_MSG_SENT) == 0) {
|
||
|
/* Do not allow to read watchdog client */
|
||
|
i = mei_find_me_client_index(dev, mei_wd_guid);
|
||
|
if (i >= 0) {
|
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struct mei_me_client *me_client = &dev->me_clients[i];
|
||
|
|
||
|
if (cl->me_client_id == me_client->client_id) {
|
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rets = -EBADF;
|
||
|
goto out;
|
||
|
}
|
||
|
}
|
||
|
} else {
|
||
|
cl->sm_state &= ~MEI_WD_STATE_INDEPENDENCE_MSG_SENT;
|
||
|
}
|
||
|
|
||
|
if (cl == &dev->iamthif_cl) {
|
||
|
rets = amthi_read(dev, file, ubuf, length, offset);
|
||
|
goto out;
|
||
|
}
|
||
|
|
||
|
if (cl->read_cb && cl->read_cb->information > *offset) {
|
||
|
cb = cl->read_cb;
|
||
|
goto copy_buffer;
|
||
|
} else if (cl->read_cb && cl->read_cb->information > 0 &&
|
||
|
cl->read_cb->information <= *offset) {
|
||
|
cb = cl->read_cb;
|
||
|
rets = 0;
|
||
|
goto free;
|
||
|
} else if ((!cl->read_cb || !cl->read_cb->information) &&
|
||
|
*offset > 0) {
|
||
|
/*Offset needs to be cleaned for contiguous reads*/
|
||
|
*offset = 0;
|
||
|
rets = 0;
|
||
|
goto out;
|
||
|
}
|
||
|
|
||
|
err = mei_start_read(dev, cl);
|
||
|
if (err && err != -EBUSY) {
|
||
|
dev_dbg(&dev->pdev->dev,
|
||
|
"mei start read failure with status = %d\n", err);
|
||
|
rets = err;
|
||
|
goto out;
|
||
|
}
|
||
|
|
||
|
if (MEI_READ_COMPLETE != cl->reading_state &&
|
||
|
!waitqueue_active(&cl->rx_wait)) {
|
||
|
if (file->f_flags & O_NONBLOCK) {
|
||
|
rets = -EAGAIN;
|
||
|
goto out;
|
||
|
}
|
||
|
|
||
|
mutex_unlock(&dev->device_lock);
|
||
|
|
||
|
if (wait_event_interruptible(cl->rx_wait,
|
||
|
(MEI_READ_COMPLETE == cl->reading_state ||
|
||
|
MEI_FILE_INITIALIZING == cl->state ||
|
||
|
MEI_FILE_DISCONNECTED == cl->state ||
|
||
|
MEI_FILE_DISCONNECTING == cl->state))) {
|
||
|
if (signal_pending(current))
|
||
|
return -EINTR;
|
||
|
return -ERESTARTSYS;
|
||
|
}
|
||
|
|
||
|
mutex_lock(&dev->device_lock);
|
||
|
if (MEI_FILE_INITIALIZING == cl->state ||
|
||
|
MEI_FILE_DISCONNECTED == cl->state ||
|
||
|
MEI_FILE_DISCONNECTING == cl->state) {
|
||
|
rets = -EBUSY;
|
||
|
goto out;
|
||
|
}
|
||
|
}
|
||
|
|
||
|
cb = cl->read_cb;
|
||
|
|
||
|
if (!cb) {
|
||
|
rets = -ENODEV;
|
||
|
goto out;
|
||
|
}
|
||
|
if (cl->reading_state != MEI_READ_COMPLETE) {
|
||
|
rets = 0;
|
||
|
goto out;
|
||
|
}
|
||
|
/* now copy the data to user space */
|
||
|
copy_buffer:
|
||
|
dev_dbg(&dev->pdev->dev, "cb->response_buffer size - %d\n",
|
||
|
cb->response_buffer.size);
|
||
|
dev_dbg(&dev->pdev->dev, "cb->information - %lu\n",
|
||
|
cb->information);
|
||
|
if (length == 0 || ubuf == NULL || *offset > cb->information) {
|
||
|
rets = -EMSGSIZE;
|
||
|
goto free;
|
||
|
}
|
||
|
|
||
|
/* length is being truncated to PAGE_SIZE, however, */
|
||
|
/* information size may be longer */
|
||
|
length = min_t(size_t, length, (cb->information - *offset));
|
||
|
|
||
|
if (copy_to_user(ubuf, cb->response_buffer.data + *offset, length)) {
|
||
|
rets = -EFAULT;
|
||
|
goto free;
|
||
|
}
|
||
|
|
||
|
rets = length;
|
||
|
*offset += length;
|
||
|
if ((unsigned long)*offset < cb->information)
|
||
|
goto out;
|
||
|
|
||
|
free:
|
||
|
cb_pos = find_read_list_entry(dev, cl);
|
||
|
/* Remove entry from read list */
|
||
|
if (cb_pos)
|
||
|
list_del(&cb_pos->cb_list);
|
||
|
mei_free_cb_private(cb);
|
||
|
cl->reading_state = MEI_IDLE;
|
||
|
cl->read_cb = NULL;
|
||
|
cl->read_pending = 0;
|
||
|
out:
|
||
|
dev_dbg(&dev->pdev->dev, "end mei read rets= %d\n", rets);
|
||
|
mutex_unlock(&dev->device_lock);
|
||
|
return rets;
|
||
|
}
|
||
|
|
||
|
/**
|
||
|
* mei_write - the write function.
|
||
|
*
|
||
|
* @file: pointer to file structure
|
||
|
* @ubuf: pointer to user buffer
|
||
|
* @length: buffer length
|
||
|
* @offset: data offset in buffer
|
||
|
*
|
||
|
* returns >=0 data length on success , <0 on error
|
||
|
*/
|
||
|
static ssize_t mei_write(struct file *file, const char __user *ubuf,
|
||
|
size_t length, loff_t *offset)
|
||
|
{
|
||
|
struct mei_cl *cl = file->private_data;
|
||
|
struct mei_cl_cb *write_cb = NULL;
|
||
|
struct mei_msg_hdr mei_hdr;
|
||
|
struct mei_device *dev;
|
||
|
unsigned long timeout = 0;
|
||
|
int rets;
|
||
|
int i;
|
||
|
|
||
|
if (WARN_ON(!cl || !cl->dev))
|
||
|
return -ENODEV;
|
||
|
|
||
|
dev = cl->dev;
|
||
|
|
||
|
mutex_lock(&dev->device_lock);
|
||
|
|
||
|
if (dev->mei_state != MEI_ENABLED) {
|
||
|
mutex_unlock(&dev->device_lock);
|
||
|
return -ENODEV;
|
||
|
}
|
||
|
|
||
|
if (cl == &dev->iamthif_cl) {
|
||
|
write_cb = find_amthi_read_list_entry(dev, file);
|
||
|
|
||
|
if (write_cb) {
|
||
|
timeout = write_cb->read_time +
|
||
|
msecs_to_jiffies(IAMTHIF_READ_TIMER);
|
||
|
|
||
|
if (time_after(jiffies, timeout) ||
|
||
|
cl->reading_state == MEI_READ_COMPLETE) {
|
||
|
*offset = 0;
|
||
|
list_del(&write_cb->cb_list);
|
||
|
mei_free_cb_private(write_cb);
|
||
|
write_cb = NULL;
|
||
|
}
|
||
|
}
|
||
|
}
|
||
|
|
||
|
/* free entry used in read */
|
||
|
if (cl->reading_state == MEI_READ_COMPLETE) {
|
||
|
*offset = 0;
|
||
|
write_cb = find_read_list_entry(dev, cl);
|
||
|
if (write_cb) {
|
||
|
list_del(&write_cb->cb_list);
|
||
|
mei_free_cb_private(write_cb);
|
||
|
write_cb = NULL;
|
||
|
cl->reading_state = MEI_IDLE;
|
||
|
cl->read_cb = NULL;
|
||
|
cl->read_pending = 0;
|
||
|
}
|
||
|
} else if (cl->reading_state == MEI_IDLE && !cl->read_pending)
|
||
|
*offset = 0;
|
||
|
|
||
|
|
||
|
write_cb = kzalloc(sizeof(struct mei_cl_cb), GFP_KERNEL);
|
||
|
if (!write_cb) {
|
||
|
mutex_unlock(&dev->device_lock);
|
||
|
return -ENOMEM;
|
||
|
}
|
||
|
|
||
|
write_cb->file_object = file;
|
||
|
write_cb->file_private = cl;
|
||
|
write_cb->request_buffer.data = kmalloc(length, GFP_KERNEL);
|
||
|
rets = -ENOMEM;
|
||
|
if (!write_cb->request_buffer.data)
|
||
|
goto unlock_dev;
|
||
|
|
||
|
dev_dbg(&dev->pdev->dev, "length =%d\n", (int) length);
|
||
|
|
||
|
rets = -EFAULT;
|
||
|
if (copy_from_user(write_cb->request_buffer.data, ubuf, length))
|
||
|
goto unlock_dev;
|
||
|
|
||
|
cl->sm_state = 0;
|
||
|
if (length == 4 &&
|
||
|
((memcmp(mei_wd_state_independence_msg[0],
|
||
|
write_cb->request_buffer.data, 4) == 0) ||
|
||
|
(memcmp(mei_wd_state_independence_msg[1],
|
||
|
write_cb->request_buffer.data, 4) == 0) ||
|
||
|
(memcmp(mei_wd_state_independence_msg[2],
|
||
|
write_cb->request_buffer.data, 4) == 0)))
|
||
|
cl->sm_state |= MEI_WD_STATE_INDEPENDENCE_MSG_SENT;
|
||
|
|
||
|
INIT_LIST_HEAD(&write_cb->cb_list);
|
||
|
if (cl == &dev->iamthif_cl) {
|
||
|
write_cb->response_buffer.data =
|
||
|
kmalloc(dev->iamthif_mtu, GFP_KERNEL);
|
||
|
if (!write_cb->response_buffer.data) {
|
||
|
rets = -ENOMEM;
|
||
|
goto unlock_dev;
|
||
|
}
|
||
|
if (dev->mei_state != MEI_ENABLED) {
|
||
|
rets = -ENODEV;
|
||
|
goto unlock_dev;
|
||
|
}
|
||
|
for (i = 0; i < dev->me_clients_num; i++) {
|
||
|
if (dev->me_clients[i].client_id ==
|
||
|
dev->iamthif_cl.me_client_id)
|
||
|
break;
|
||
|
}
|
||
|
|
||
|
if (WARN_ON(dev->me_clients[i].client_id != cl->me_client_id)) {
|
||
|
rets = -ENODEV;
|
||
|
goto unlock_dev;
|
||
|
}
|
||
|
if (i == dev->me_clients_num ||
|
||
|
(dev->me_clients[i].client_id !=
|
||
|
dev->iamthif_cl.me_client_id)) {
|
||
|
rets = -ENODEV;
|
||
|
goto unlock_dev;
|
||
|
} else if (length > dev->me_clients[i].props.max_msg_length ||
|
||
|
length <= 0) {
|
||
|
rets = -EMSGSIZE;
|
||
|
goto unlock_dev;
|
||
|
}
|
||
|
|
||
|
write_cb->response_buffer.size = dev->iamthif_mtu;
|
||
|
write_cb->major_file_operations = MEI_IOCTL;
|
||
|
write_cb->information = 0;
|
||
|
write_cb->request_buffer.size = length;
|
||
|
if (dev->iamthif_cl.state != MEI_FILE_CONNECTED) {
|
||
|
rets = -ENODEV;
|
||
|
goto unlock_dev;
|
||
|
}
|
||
|
|
||
|
if (!list_empty(&dev->amthi_cmd_list.mei_cb.cb_list) ||
|
||
|
dev->iamthif_state != MEI_IAMTHIF_IDLE) {
|
||
|
dev_dbg(&dev->pdev->dev, "amthi_state = %d\n",
|
||
|
(int) dev->iamthif_state);
|
||
|
dev_dbg(&dev->pdev->dev, "add amthi cb to amthi cmd waiting list\n");
|
||
|
list_add_tail(&write_cb->cb_list,
|
||
|
&dev->amthi_cmd_list.mei_cb.cb_list);
|
||
|
rets = length;
|
||
|
} else {
|
||
|
dev_dbg(&dev->pdev->dev, "call amthi write\n");
|
||
|
rets = amthi_write(dev, write_cb);
|
||
|
|
||
|
if (rets) {
|
||
|
dev_dbg(&dev->pdev->dev, "amthi write failed with status = %d\n",
|
||
|
rets);
|
||
|
goto unlock_dev;
|
||
|
}
|
||
|
rets = length;
|
||
|
}
|
||
|
mutex_unlock(&dev->device_lock);
|
||
|
return rets;
|
||
|
}
|
||
|
|
||
|
write_cb->major_file_operations = MEI_WRITE;
|
||
|
/* make sure information is zero before we start */
|
||
|
|
||
|
write_cb->information = 0;
|
||
|
write_cb->request_buffer.size = length;
|
||
|
|
||
|
dev_dbg(&dev->pdev->dev, "host client = %d, ME client = %d\n",
|
||
|
cl->host_client_id, cl->me_client_id);
|
||
|
if (cl->state != MEI_FILE_CONNECTED) {
|
||
|
rets = -ENODEV;
|
||
|
dev_dbg(&dev->pdev->dev, "host client = %d, is not connected to ME client = %d",
|
||
|
cl->host_client_id,
|
||
|
cl->me_client_id);
|
||
|
goto unlock_dev;
|
||
|
}
|
||
|
for (i = 0; i < dev->me_clients_num; i++) {
|
||
|
if (dev->me_clients[i].client_id ==
|
||
|
cl->me_client_id)
|
||
|
break;
|
||
|
}
|
||
|
if (WARN_ON(dev->me_clients[i].client_id != cl->me_client_id)) {
|
||
|
rets = -ENODEV;
|
||
|
goto unlock_dev;
|
||
|
}
|
||
|
if (i == dev->me_clients_num) {
|
||
|
rets = -ENODEV;
|
||
|
goto unlock_dev;
|
||
|
}
|
||
|
if (length > dev->me_clients[i].props.max_msg_length || length <= 0) {
|
||
|
rets = -EINVAL;
|
||
|
goto unlock_dev;
|
||
|
}
|
||
|
write_cb->file_private = cl;
|
||
|
|
||
|
rets = mei_flow_ctrl_creds(dev, cl);
|
||
|
if (rets < 0)
|
||
|
goto unlock_dev;
|
||
|
|
||
|
if (rets && dev->mei_host_buffer_is_empty) {
|
||
|
rets = 0;
|
||
|
dev->mei_host_buffer_is_empty = false;
|
||
|
if (length > ((((dev->host_hw_state & H_CBD) >> 24) *
|
||
|
sizeof(u32)) - sizeof(struct mei_msg_hdr))) {
|
||
|
|
||
|
mei_hdr.length =
|
||
|
(((dev->host_hw_state & H_CBD) >> 24) *
|
||
|
sizeof(u32)) -
|
||
|
sizeof(struct mei_msg_hdr);
|
||
|
mei_hdr.msg_complete = 0;
|
||
|
} else {
|
||
|
mei_hdr.length = length;
|
||
|
mei_hdr.msg_complete = 1;
|
||
|
}
|
||
|
mei_hdr.host_addr = cl->host_client_id;
|
||
|
mei_hdr.me_addr = cl->me_client_id;
|
||
|
mei_hdr.reserved = 0;
|
||
|
dev_dbg(&dev->pdev->dev, "call mei_write_message header=%08x.\n",
|
||
|
*((u32 *) &mei_hdr));
|
||
|
if (mei_write_message(dev, &mei_hdr,
|
||
|
(unsigned char *) (write_cb->request_buffer.data),
|
||
|
mei_hdr.length)) {
|
||
|
rets = -ENODEV;
|
||
|
goto unlock_dev;
|
||
|
}
|
||
|
cl->writing_state = MEI_WRITING;
|
||
|
write_cb->information = mei_hdr.length;
|
||
|
if (mei_hdr.msg_complete) {
|
||
|
if (mei_flow_ctrl_reduce(dev, cl)) {
|
||
|
rets = -ENODEV;
|
||
|
goto unlock_dev;
|
||
|
}
|
||
|
list_add_tail(&write_cb->cb_list,
|
||
|
&dev->write_waiting_list.mei_cb.cb_list);
|
||
|
} else {
|
||
|
list_add_tail(&write_cb->cb_list,
|
||
|
&dev->write_list.mei_cb.cb_list);
|
||
|
}
|
||
|
|
||
|
} else {
|
||
|
|
||
|
write_cb->information = 0;
|
||
|
cl->writing_state = MEI_WRITING;
|
||
|
list_add_tail(&write_cb->cb_list,
|
||
|
&dev->write_list.mei_cb.cb_list);
|
||
|
}
|
||
|
mutex_unlock(&dev->device_lock);
|
||
|
return length;
|
||
|
|
||
|
unlock_dev:
|
||
|
mutex_unlock(&dev->device_lock);
|
||
|
mei_free_cb_private(write_cb);
|
||
|
return rets;
|
||
|
}
|
||
|
|
||
|
|
||
|
/**
|
||
|
* mei_ioctl - the IOCTL function
|
||
|
*
|
||
|
* @file: pointer to file structure
|
||
|
* @cmd: ioctl command
|
||
|
* @data: pointer to mei message structure
|
||
|
*
|
||
|
* returns 0 on success , <0 on error
|
||
|
*/
|
||
|
static long mei_ioctl(struct file *file, unsigned int cmd, unsigned long data)
|
||
|
{
|
||
|
struct mei_device *dev;
|
||
|
struct mei_cl *cl = file->private_data;
|
||
|
struct mei_connect_client_data *connect_data = NULL;
|
||
|
int rets;
|
||
|
|
||
|
if (cmd != IOCTL_MEI_CONNECT_CLIENT)
|
||
|
return -EINVAL;
|
||
|
|
||
|
if (WARN_ON(!cl || !cl->dev))
|
||
|
return -ENODEV;
|
||
|
|
||
|
dev = cl->dev;
|
||
|
|
||
|
dev_dbg(&dev->pdev->dev, "IOCTL cmd = 0x%x", cmd);
|
||
|
|
||
|
mutex_lock(&dev->device_lock);
|
||
|
if (dev->mei_state != MEI_ENABLED) {
|
||
|
rets = -ENODEV;
|
||
|
goto out;
|
||
|
}
|
||
|
|
||
|
dev_dbg(&dev->pdev->dev, ": IOCTL_MEI_CONNECT_CLIENT.\n");
|
||
|
|
||
|
connect_data = kzalloc(sizeof(struct mei_connect_client_data),
|
||
|
GFP_KERNEL);
|
||
|
if (!connect_data) {
|
||
|
rets = -ENOMEM;
|
||
|
goto out;
|
||
|
}
|
||
|
dev_dbg(&dev->pdev->dev, "copy connect data from user\n");
|
||
|
if (copy_from_user(connect_data, (char __user *)data,
|
||
|
sizeof(struct mei_connect_client_data))) {
|
||
|
dev_dbg(&dev->pdev->dev, "failed to copy data from userland\n");
|
||
|
rets = -EFAULT;
|
||
|
goto out;
|
||
|
}
|
||
|
rets = mei_ioctl_connect_client(file, connect_data);
|
||
|
|
||
|
/* if all is ok, copying the data back to user. */
|
||
|
if (rets)
|
||
|
goto out;
|
||
|
|
||
|
dev_dbg(&dev->pdev->dev, "copy connect data to user\n");
|
||
|
if (copy_to_user((char __user *)data, connect_data,
|
||
|
sizeof(struct mei_connect_client_data))) {
|
||
|
dev_dbg(&dev->pdev->dev, "failed to copy data to userland\n");
|
||
|
rets = -EFAULT;
|
||
|
goto out;
|
||
|
}
|
||
|
|
||
|
out:
|
||
|
kfree(connect_data);
|
||
|
mutex_unlock(&dev->device_lock);
|
||
|
return rets;
|
||
|
}
|
||
|
|
||
|
/**
|
||
|
* mei_compat_ioctl - the compat IOCTL function
|
||
|
*
|
||
|
* @file: pointer to file structure
|
||
|
* @cmd: ioctl command
|
||
|
* @data: pointer to mei message structure
|
||
|
*
|
||
|
* returns 0 on success , <0 on error
|
||
|
*/
|
||
|
#ifdef CONFIG_COMPAT
|
||
|
static long mei_compat_ioctl(struct file *file,
|
||
|
unsigned int cmd, unsigned long data)
|
||
|
{
|
||
|
return mei_ioctl(file, cmd, (unsigned long)compat_ptr(data));
|
||
|
}
|
||
|
#endif
|
||
|
|
||
|
|
||
|
/**
|
||
|
* mei_poll - the poll function
|
||
|
*
|
||
|
* @file: pointer to file structure
|
||
|
* @wait: pointer to poll_table structure
|
||
|
*
|
||
|
* returns poll mask
|
||
|
*/
|
||
|
static unsigned int mei_poll(struct file *file, poll_table *wait)
|
||
|
{
|
||
|
struct mei_cl *cl = file->private_data;
|
||
|
struct mei_device *dev;
|
||
|
unsigned int mask = 0;
|
||
|
|
||
|
if (WARN_ON(!cl || !cl->dev))
|
||
|
return mask;
|
||
|
|
||
|
dev = cl->dev;
|
||
|
|
||
|
mutex_lock(&dev->device_lock);
|
||
|
|
||
|
if (dev->mei_state != MEI_ENABLED)
|
||
|
goto out;
|
||
|
|
||
|
|
||
|
if (cl == &dev->iamthif_cl) {
|
||
|
mutex_unlock(&dev->device_lock);
|
||
|
poll_wait(file, &dev->iamthif_cl.wait, wait);
|
||
|
mutex_lock(&dev->device_lock);
|
||
|
if (dev->iamthif_state == MEI_IAMTHIF_READ_COMPLETE &&
|
||
|
dev->iamthif_file_object == file) {
|
||
|
mask |= (POLLIN | POLLRDNORM);
|
||
|
dev_dbg(&dev->pdev->dev, "run next amthi cb\n");
|
||
|
mei_run_next_iamthif_cmd(dev);
|
||
|
}
|
||
|
goto out;
|
||
|
}
|
||
|
|
||
|
mutex_unlock(&dev->device_lock);
|
||
|
poll_wait(file, &cl->tx_wait, wait);
|
||
|
mutex_lock(&dev->device_lock);
|
||
|
if (MEI_WRITE_COMPLETE == cl->writing_state)
|
||
|
mask |= (POLLIN | POLLRDNORM);
|
||
|
|
||
|
out:
|
||
|
mutex_unlock(&dev->device_lock);
|
||
|
return mask;
|
||
|
}
|
||
|
|
||
|
/*
|
||
|
* file operations structure will be used for mei char device.
|
||
|
*/
|
||
|
static const struct file_operations mei_fops = {
|
||
|
.owner = THIS_MODULE,
|
||
|
.read = mei_read,
|
||
|
.unlocked_ioctl = mei_ioctl,
|
||
|
#ifdef CONFIG_COMPAT
|
||
|
.compat_ioctl = mei_compat_ioctl,
|
||
|
#endif
|
||
|
.open = mei_open,
|
||
|
.release = mei_release,
|
||
|
.write = mei_write,
|
||
|
.poll = mei_poll,
|
||
|
.llseek = no_llseek
|
||
|
};
|
||
|
|
||
|
|
||
|
/*
|
||
|
* Misc Device Struct
|
||
|
*/
|
||
|
static struct miscdevice mei_misc_device = {
|
||
|
.name = "mei",
|
||
|
.fops = &mei_fops,
|
||
|
.minor = MISC_DYNAMIC_MINOR,
|
||
|
};
|
||
|
|
||
|
/**
|
||
|
* mei_probe - Device Initialization Routine
|
||
|
*
|
||
|
* @pdev: PCI device structure
|
||
|
* @ent: entry in kcs_pci_tbl
|
||
|
*
|
||
|
* returns 0 on success, <0 on failure.
|
||
|
*/
|
||
|
static int __devinit mei_probe(struct pci_dev *pdev,
|
||
|
const struct pci_device_id *ent)
|
||
|
{
|
||
|
struct mei_device *dev;
|
||
|
int err;
|
||
|
|
||
|
mutex_lock(&mei_mutex);
|
||
|
if (mei_device) {
|
||
|
err = -EEXIST;
|
||
|
goto end;
|
||
|
}
|
||
|
/* enable pci dev */
|
||
|
err = pci_enable_device(pdev);
|
||
|
if (err) {
|
||
|
printk(KERN_ERR "mei: Failed to enable pci device.\n");
|
||
|
goto end;
|
||
|
}
|
||
|
/* set PCI host mastering */
|
||
|
pci_set_master(pdev);
|
||
|
/* pci request regions for mei driver */
|
||
|
err = pci_request_regions(pdev, mei_driver_name);
|
||
|
if (err) {
|
||
|
printk(KERN_ERR "mei: Failed to get pci regions.\n");
|
||
|
goto disable_device;
|
||
|
}
|
||
|
/* allocates and initializes the mei dev structure */
|
||
|
dev = mei_device_init(pdev);
|
||
|
if (!dev) {
|
||
|
err = -ENOMEM;
|
||
|
goto release_regions;
|
||
|
}
|
||
|
/* mapping IO device memory */
|
||
|
dev->mem_addr = pci_iomap(pdev, 0, 0);
|
||
|
if (!dev->mem_addr) {
|
||
|
printk(KERN_ERR "mei: mapping I/O device memory failure.\n");
|
||
|
err = -ENOMEM;
|
||
|
goto free_device;
|
||
|
}
|
||
|
pci_enable_msi(pdev);
|
||
|
|
||
|
/* request and enable interrupt */
|
||
|
if (pci_dev_msi_enabled(pdev))
|
||
|
err = request_threaded_irq(pdev->irq,
|
||
|
NULL,
|
||
|
mei_interrupt_thread_handler,
|
||
|
0, mei_driver_name, dev);
|
||
|
else
|
||
|
err = request_threaded_irq(pdev->irq,
|
||
|
mei_interrupt_quick_handler,
|
||
|
mei_interrupt_thread_handler,
|
||
|
IRQF_SHARED, mei_driver_name, dev);
|
||
|
|
||
|
if (err) {
|
||
|
printk(KERN_ERR "mei: request_threaded_irq failure. irq = %d\n",
|
||
|
pdev->irq);
|
||
|
goto unmap_memory;
|
||
|
}
|
||
|
INIT_DELAYED_WORK(&dev->timer_work, mei_timer);
|
||
|
if (mei_hw_init(dev)) {
|
||
|
printk(KERN_ERR "mei: Init hw failure.\n");
|
||
|
err = -ENODEV;
|
||
|
goto release_irq;
|
||
|
}
|
||
|
|
||
|
err = misc_register(&mei_misc_device);
|
||
|
if (err)
|
||
|
goto release_irq;
|
||
|
|
||
|
mei_device = pdev;
|
||
|
pci_set_drvdata(pdev, dev);
|
||
|
|
||
|
|
||
|
schedule_delayed_work(&dev->timer_work, HZ);
|
||
|
|
||
|
mutex_unlock(&mei_mutex);
|
||
|
|
||
|
pr_debug("initialization successful.\n");
|
||
|
|
||
|
return 0;
|
||
|
|
||
|
release_irq:
|
||
|
/* disable interrupts */
|
||
|
dev->host_hw_state = mei_hcsr_read(dev);
|
||
|
mei_disable_interrupts(dev);
|
||
|
flush_scheduled_work();
|
||
|
free_irq(pdev->irq, dev);
|
||
|
pci_disable_msi(pdev);
|
||
|
unmap_memory:
|
||
|
pci_iounmap(pdev, dev->mem_addr);
|
||
|
free_device:
|
||
|
kfree(dev);
|
||
|
release_regions:
|
||
|
pci_release_regions(pdev);
|
||
|
disable_device:
|
||
|
pci_disable_device(pdev);
|
||
|
end:
|
||
|
mutex_unlock(&mei_mutex);
|
||
|
printk(KERN_ERR "mei: Driver initialization failed.\n");
|
||
|
return err;
|
||
|
}
|
||
|
|
||
|
/**
|
||
|
* mei_remove - Device Removal Routine
|
||
|
*
|
||
|
* @pdev: PCI device structure
|
||
|
*
|
||
|
* mei_remove is called by the PCI subsystem to alert the driver
|
||
|
* that it should release a PCI device.
|
||
|
*/
|
||
|
static void __devexit mei_remove(struct pci_dev *pdev)
|
||
|
{
|
||
|
struct mei_device *dev;
|
||
|
|
||
|
if (mei_device != pdev)
|
||
|
return;
|
||
|
|
||
|
dev = pci_get_drvdata(pdev);
|
||
|
if (!dev)
|
||
|
return;
|
||
|
|
||
|
mutex_lock(&dev->device_lock);
|
||
|
|
||
|
mei_wd_stop(dev, false);
|
||
|
|
||
|
mei_device = NULL;
|
||
|
|
||
|
if (dev->iamthif_cl.state == MEI_FILE_CONNECTED) {
|
||
|
dev->iamthif_cl.state = MEI_FILE_DISCONNECTING;
|
||
|
mei_disconnect_host_client(dev, &dev->iamthif_cl);
|
||
|
}
|
||
|
if (dev->wd_cl.state == MEI_FILE_CONNECTED) {
|
||
|
dev->wd_cl.state = MEI_FILE_DISCONNECTING;
|
||
|
mei_disconnect_host_client(dev, &dev->wd_cl);
|
||
|
}
|
||
|
|
||
|
/* Unregistering watchdog device */
|
||
|
mei_watchdog_unregister(dev);
|
||
|
|
||
|
/* remove entry if already in list */
|
||
|
dev_dbg(&pdev->dev, "list del iamthif and wd file list.\n");
|
||
|
mei_remove_client_from_file_list(dev, dev->wd_cl.host_client_id);
|
||
|
mei_remove_client_from_file_list(dev, dev->iamthif_cl.host_client_id);
|
||
|
|
||
|
dev->iamthif_current_cb = NULL;
|
||
|
dev->me_clients_num = 0;
|
||
|
|
||
|
mutex_unlock(&dev->device_lock);
|
||
|
|
||
|
flush_scheduled_work();
|
||
|
|
||
|
/* disable interrupts */
|
||
|
mei_disable_interrupts(dev);
|
||
|
|
||
|
free_irq(pdev->irq, dev);
|
||
|
pci_disable_msi(pdev);
|
||
|
pci_set_drvdata(pdev, NULL);
|
||
|
|
||
|
if (dev->mem_addr)
|
||
|
pci_iounmap(pdev, dev->mem_addr);
|
||
|
|
||
|
kfree(dev);
|
||
|
|
||
|
pci_release_regions(pdev);
|
||
|
pci_disable_device(pdev);
|
||
|
}
|
||
|
#ifdef CONFIG_PM
|
||
|
static int mei_pci_suspend(struct device *device)
|
||
|
{
|
||
|
struct pci_dev *pdev = to_pci_dev(device);
|
||
|
struct mei_device *dev = pci_get_drvdata(pdev);
|
||
|
int err;
|
||
|
|
||
|
if (!dev)
|
||
|
return -ENODEV;
|
||
|
mutex_lock(&dev->device_lock);
|
||
|
/* Stop watchdog if exists */
|
||
|
err = mei_wd_stop(dev, true);
|
||
|
/* Set new mei state */
|
||
|
if (dev->mei_state == MEI_ENABLED ||
|
||
|
dev->mei_state == MEI_RECOVERING_FROM_RESET) {
|
||
|
dev->mei_state = MEI_POWER_DOWN;
|
||
|
mei_reset(dev, 0);
|
||
|
}
|
||
|
mutex_unlock(&dev->device_lock);
|
||
|
|
||
|
free_irq(pdev->irq, dev);
|
||
|
pci_disable_msi(pdev);
|
||
|
|
||
|
return err;
|
||
|
}
|
||
|
|
||
|
static int mei_pci_resume(struct device *device)
|
||
|
{
|
||
|
struct pci_dev *pdev = to_pci_dev(device);
|
||
|
struct mei_device *dev;
|
||
|
int err;
|
||
|
|
||
|
dev = pci_get_drvdata(pdev);
|
||
|
if (!dev)
|
||
|
return -ENODEV;
|
||
|
|
||
|
pci_enable_msi(pdev);
|
||
|
|
||
|
/* request and enable interrupt */
|
||
|
if (pci_dev_msi_enabled(pdev))
|
||
|
err = request_threaded_irq(pdev->irq,
|
||
|
NULL,
|
||
|
mei_interrupt_thread_handler,
|
||
|
0, mei_driver_name, dev);
|
||
|
else
|
||
|
err = request_threaded_irq(pdev->irq,
|
||
|
mei_interrupt_quick_handler,
|
||
|
mei_interrupt_thread_handler,
|
||
|
IRQF_SHARED, mei_driver_name, dev);
|
||
|
|
||
|
if (err) {
|
||
|
printk(KERN_ERR "mei: Request_irq failure. irq = %d\n",
|
||
|
pdev->irq);
|
||
|
return err;
|
||
|
}
|
||
|
|
||
|
mutex_lock(&dev->device_lock);
|
||
|
dev->mei_state = MEI_POWER_UP;
|
||
|
mei_reset(dev, 1);
|
||
|
mutex_unlock(&dev->device_lock);
|
||
|
|
||
|
/* Start timer if stopped in suspend */
|
||
|
schedule_delayed_work(&dev->timer_work, HZ);
|
||
|
|
||
|
return err;
|
||
|
}
|
||
|
static SIMPLE_DEV_PM_OPS(mei_pm_ops, mei_pci_suspend, mei_pci_resume);
|
||
|
#define MEI_PM_OPS (&mei_pm_ops)
|
||
|
#else
|
||
|
#define MEI_PM_OPS NULL
|
||
|
#endif /* CONFIG_PM */
|
||
|
/*
|
||
|
* PCI driver structure
|
||
|
*/
|
||
|
static struct pci_driver mei_driver = {
|
||
|
.name = mei_driver_name,
|
||
|
.id_table = mei_pci_tbl,
|
||
|
.probe = mei_probe,
|
||
|
.remove = __devexit_p(mei_remove),
|
||
|
.shutdown = __devexit_p(mei_remove),
|
||
|
.driver.pm = MEI_PM_OPS,
|
||
|
};
|
||
|
|
||
|
/**
|
||
|
* mei_init_module - Driver Registration Routine
|
||
|
*
|
||
|
* mei_init_module is the first routine called when the driver is
|
||
|
* loaded. All it does is to register with the PCI subsystem.
|
||
|
*
|
||
|
* returns 0 on success, <0 on failure.
|
||
|
*/
|
||
|
static int __init mei_init_module(void)
|
||
|
{
|
||
|
int ret;
|
||
|
|
||
|
pr_debug("loading.\n");
|
||
|
/* init pci module */
|
||
|
ret = pci_register_driver(&mei_driver);
|
||
|
if (ret < 0)
|
||
|
printk(KERN_ERR "mei: Error registering driver.\n");
|
||
|
|
||
|
return ret;
|
||
|
}
|
||
|
|
||
|
module_init(mei_init_module);
|
||
|
|
||
|
/**
|
||
|
* mei_exit_module - Driver Exit Cleanup Routine
|
||
|
*
|
||
|
* mei_exit_module is called just before the driver is removed
|
||
|
* from memory.
|
||
|
*/
|
||
|
static void __exit mei_exit_module(void)
|
||
|
{
|
||
|
misc_deregister(&mei_misc_device);
|
||
|
pci_unregister_driver(&mei_driver);
|
||
|
|
||
|
pr_debug("unloaded successfully.\n");
|
||
|
}
|
||
|
|
||
|
module_exit(mei_exit_module);
|
||
|
|
||
|
|
||
|
MODULE_AUTHOR("Intel Corporation");
|
||
|
MODULE_DESCRIPTION("Intel(R) Management Engine Interface");
|
||
|
MODULE_LICENSE("GPL v2");
|