340 lines
8.4 KiB
C
340 lines
8.4 KiB
C
/*
|
|
*
|
|
* Intel Management Engine Interface (Intel MEI) Linux driver
|
|
* Copyright (c) 2003-2012, 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.
|
|
*
|
|
*/
|
|
|
|
#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
|
|
|
|
#include <linux/module.h>
|
|
#include <linux/moduleparam.h>
|
|
#include <linux/kernel.h>
|
|
#include <linux/device.h>
|
|
#include <linux/fs.h>
|
|
#include <linux/errno.h>
|
|
#include <linux/types.h>
|
|
#include <linux/fcntl.h>
|
|
#include <linux/aio.h>
|
|
#include <linux/pci.h>
|
|
#include <linux/poll.h>
|
|
#include <linux/init.h>
|
|
#include <linux/ioctl.h>
|
|
#include <linux/cdev.h>
|
|
#include <linux/sched.h>
|
|
#include <linux/uuid.h>
|
|
#include <linux/compat.h>
|
|
#include <linux/jiffies.h>
|
|
#include <linux/interrupt.h>
|
|
#include <linux/miscdevice.h>
|
|
|
|
#include <linux/mei.h>
|
|
|
|
#include "mei_dev.h"
|
|
#include "hw-me.h"
|
|
#include "client.h"
|
|
|
|
/* mei_pci_tbl - PCI Device ID Table */
|
|
static DEFINE_PCI_DEVICE_TABLE(mei_me_pci_tbl) = {
|
|
{PCI_DEVICE(PCI_VENDOR_ID_INTEL, MEI_DEV_ID_82946GZ)},
|
|
{PCI_DEVICE(PCI_VENDOR_ID_INTEL, MEI_DEV_ID_82G35)},
|
|
{PCI_DEVICE(PCI_VENDOR_ID_INTEL, MEI_DEV_ID_82Q965)},
|
|
{PCI_DEVICE(PCI_VENDOR_ID_INTEL, MEI_DEV_ID_82G965)},
|
|
{PCI_DEVICE(PCI_VENDOR_ID_INTEL, MEI_DEV_ID_82GM965)},
|
|
{PCI_DEVICE(PCI_VENDOR_ID_INTEL, MEI_DEV_ID_82GME965)},
|
|
{PCI_DEVICE(PCI_VENDOR_ID_INTEL, MEI_DEV_ID_ICH9_82Q35)},
|
|
{PCI_DEVICE(PCI_VENDOR_ID_INTEL, MEI_DEV_ID_ICH9_82G33)},
|
|
{PCI_DEVICE(PCI_VENDOR_ID_INTEL, MEI_DEV_ID_ICH9_82Q33)},
|
|
{PCI_DEVICE(PCI_VENDOR_ID_INTEL, MEI_DEV_ID_ICH9_82X38)},
|
|
{PCI_DEVICE(PCI_VENDOR_ID_INTEL, MEI_DEV_ID_ICH9_3200)},
|
|
{PCI_DEVICE(PCI_VENDOR_ID_INTEL, MEI_DEV_ID_ICH9_6)},
|
|
{PCI_DEVICE(PCI_VENDOR_ID_INTEL, MEI_DEV_ID_ICH9_7)},
|
|
{PCI_DEVICE(PCI_VENDOR_ID_INTEL, MEI_DEV_ID_ICH9_8)},
|
|
{PCI_DEVICE(PCI_VENDOR_ID_INTEL, MEI_DEV_ID_ICH9_9)},
|
|
{PCI_DEVICE(PCI_VENDOR_ID_INTEL, MEI_DEV_ID_ICH9_10)},
|
|
{PCI_DEVICE(PCI_VENDOR_ID_INTEL, MEI_DEV_ID_ICH9M_1)},
|
|
{PCI_DEVICE(PCI_VENDOR_ID_INTEL, MEI_DEV_ID_ICH9M_2)},
|
|
{PCI_DEVICE(PCI_VENDOR_ID_INTEL, MEI_DEV_ID_ICH9M_3)},
|
|
{PCI_DEVICE(PCI_VENDOR_ID_INTEL, MEI_DEV_ID_ICH9M_4)},
|
|
{PCI_DEVICE(PCI_VENDOR_ID_INTEL, MEI_DEV_ID_ICH10_1)},
|
|
{PCI_DEVICE(PCI_VENDOR_ID_INTEL, MEI_DEV_ID_ICH10_2)},
|
|
{PCI_DEVICE(PCI_VENDOR_ID_INTEL, MEI_DEV_ID_ICH10_3)},
|
|
{PCI_DEVICE(PCI_VENDOR_ID_INTEL, MEI_DEV_ID_ICH10_4)},
|
|
{PCI_DEVICE(PCI_VENDOR_ID_INTEL, MEI_DEV_ID_IBXPK_1)},
|
|
{PCI_DEVICE(PCI_VENDOR_ID_INTEL, MEI_DEV_ID_IBXPK_2)},
|
|
{PCI_DEVICE(PCI_VENDOR_ID_INTEL, MEI_DEV_ID_CPT_1)},
|
|
{PCI_DEVICE(PCI_VENDOR_ID_INTEL, MEI_DEV_ID_PBG_1)},
|
|
{PCI_DEVICE(PCI_VENDOR_ID_INTEL, MEI_DEV_ID_PPT_1)},
|
|
{PCI_DEVICE(PCI_VENDOR_ID_INTEL, MEI_DEV_ID_PPT_2)},
|
|
{PCI_DEVICE(PCI_VENDOR_ID_INTEL, MEI_DEV_ID_PPT_3)},
|
|
{PCI_DEVICE(PCI_VENDOR_ID_INTEL, MEI_DEV_ID_LPT)},
|
|
{PCI_DEVICE(PCI_VENDOR_ID_INTEL, MEI_DEV_ID_LPT_LP)},
|
|
|
|
/* required last entry */
|
|
{0, }
|
|
};
|
|
|
|
MODULE_DEVICE_TABLE(pci, mei_me_pci_tbl);
|
|
|
|
/**
|
|
* mei_quirk_probe - probe for devices that doesn't valid ME interface
|
|
*
|
|
* @pdev: PCI device structure
|
|
* @ent: entry into pci_device_table
|
|
*
|
|
* returns true if ME Interface is valid, false otherwise
|
|
*/
|
|
static bool mei_me_quirk_probe(struct pci_dev *pdev,
|
|
const struct pci_device_id *ent)
|
|
{
|
|
u32 reg;
|
|
if (ent->device == MEI_DEV_ID_PBG_1) {
|
|
pci_read_config_dword(pdev, 0x48, ®);
|
|
/* make sure that bit 9 is up and bit 10 is down */
|
|
if ((reg & 0x600) == 0x200) {
|
|
dev_info(&pdev->dev, "Device doesn't have valid ME Interface\n");
|
|
return false;
|
|
}
|
|
}
|
|
return true;
|
|
}
|
|
/**
|
|
* mei_probe - Device Initialization Routine
|
|
*
|
|
* @pdev: PCI device structure
|
|
* @ent: entry in kcs_pci_tbl
|
|
*
|
|
* returns 0 on success, <0 on failure.
|
|
*/
|
|
static int mei_me_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
|
|
{
|
|
struct mei_device *dev;
|
|
struct mei_me_hw *hw;
|
|
int err;
|
|
|
|
|
|
if (!mei_me_quirk_probe(pdev, ent)) {
|
|
err = -ENODEV;
|
|
goto end;
|
|
}
|
|
|
|
/* enable pci dev */
|
|
err = pci_enable_device(pdev);
|
|
if (err) {
|
|
dev_err(&pdev->dev, "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, KBUILD_MODNAME);
|
|
if (err) {
|
|
dev_err(&pdev->dev, "failed to get pci regions.\n");
|
|
goto disable_device;
|
|
}
|
|
/* allocates and initializes the mei dev structure */
|
|
dev = mei_me_dev_init(pdev);
|
|
if (!dev) {
|
|
err = -ENOMEM;
|
|
goto release_regions;
|
|
}
|
|
hw = to_me_hw(dev);
|
|
/* mapping IO device memory */
|
|
hw->mem_addr = pci_iomap(pdev, 0, 0);
|
|
if (!hw->mem_addr) {
|
|
dev_err(&pdev->dev, "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_me_irq_thread_handler,
|
|
IRQF_ONESHOT, KBUILD_MODNAME, dev);
|
|
else
|
|
err = request_threaded_irq(pdev->irq,
|
|
mei_me_irq_quick_handler,
|
|
mei_me_irq_thread_handler,
|
|
IRQF_SHARED, KBUILD_MODNAME, dev);
|
|
|
|
if (err) {
|
|
dev_err(&pdev->dev, "request_threaded_irq failure. irq = %d\n",
|
|
pdev->irq);
|
|
goto disable_msi;
|
|
}
|
|
|
|
if (mei_start(dev)) {
|
|
dev_err(&pdev->dev, "init hw failure.\n");
|
|
err = -ENODEV;
|
|
goto release_irq;
|
|
}
|
|
|
|
err = mei_register(dev);
|
|
if (err)
|
|
goto release_irq;
|
|
|
|
pci_set_drvdata(pdev, dev);
|
|
|
|
schedule_delayed_work(&dev->timer_work, HZ);
|
|
|
|
pr_debug("initialization successful.\n");
|
|
|
|
return 0;
|
|
|
|
release_irq:
|
|
mei_disable_interrupts(dev);
|
|
flush_scheduled_work();
|
|
free_irq(pdev->irq, dev);
|
|
disable_msi:
|
|
pci_disable_msi(pdev);
|
|
pci_iounmap(pdev, hw->mem_addr);
|
|
free_device:
|
|
kfree(dev);
|
|
release_regions:
|
|
pci_release_regions(pdev);
|
|
disable_device:
|
|
pci_disable_device(pdev);
|
|
end:
|
|
dev_err(&pdev->dev, "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 mei_me_remove(struct pci_dev *pdev)
|
|
{
|
|
struct mei_device *dev;
|
|
struct mei_me_hw *hw;
|
|
|
|
dev = pci_get_drvdata(pdev);
|
|
if (!dev)
|
|
return;
|
|
|
|
hw = to_me_hw(dev);
|
|
|
|
|
|
dev_err(&pdev->dev, "stop\n");
|
|
mei_stop(dev);
|
|
|
|
/* disable interrupts */
|
|
mei_disable_interrupts(dev);
|
|
|
|
free_irq(pdev->irq, dev);
|
|
pci_disable_msi(pdev);
|
|
pci_set_drvdata(pdev, NULL);
|
|
|
|
if (hw->mem_addr)
|
|
pci_iounmap(pdev, hw->mem_addr);
|
|
|
|
mei_deregister(dev);
|
|
|
|
kfree(dev);
|
|
|
|
pci_release_regions(pdev);
|
|
pci_disable_device(pdev);
|
|
|
|
|
|
}
|
|
#ifdef CONFIG_PM
|
|
static int mei_me_pci_suspend(struct device *device)
|
|
{
|
|
struct pci_dev *pdev = to_pci_dev(device);
|
|
struct mei_device *dev = pci_get_drvdata(pdev);
|
|
|
|
if (!dev)
|
|
return -ENODEV;
|
|
|
|
dev_err(&pdev->dev, "suspend\n");
|
|
|
|
mei_stop(dev);
|
|
|
|
mei_disable_interrupts(dev);
|
|
|
|
free_irq(pdev->irq, dev);
|
|
pci_disable_msi(pdev);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int mei_me_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_me_irq_thread_handler,
|
|
IRQF_ONESHOT, KBUILD_MODNAME, dev);
|
|
else
|
|
err = request_threaded_irq(pdev->irq,
|
|
mei_me_irq_quick_handler,
|
|
mei_me_irq_thread_handler,
|
|
IRQF_SHARED, KBUILD_MODNAME, dev);
|
|
|
|
if (err) {
|
|
dev_err(&pdev->dev, "request_threaded_irq failed: irq = %d.\n",
|
|
pdev->irq);
|
|
return err;
|
|
}
|
|
|
|
mutex_lock(&dev->device_lock);
|
|
dev->dev_state = MEI_DEV_POWER_UP;
|
|
mei_clear_interrupts(dev);
|
|
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_me_pm_ops, mei_me_pci_suspend, mei_me_pci_resume);
|
|
#define MEI_ME_PM_OPS (&mei_me_pm_ops)
|
|
#else
|
|
#define MEI_ME_PM_OPS NULL
|
|
#endif /* CONFIG_PM */
|
|
/*
|
|
* PCI driver structure
|
|
*/
|
|
static struct pci_driver mei_me_driver = {
|
|
.name = KBUILD_MODNAME,
|
|
.id_table = mei_me_pci_tbl,
|
|
.probe = mei_me_probe,
|
|
.remove = mei_me_remove,
|
|
.shutdown = mei_me_remove,
|
|
.driver.pm = MEI_ME_PM_OPS,
|
|
};
|
|
|
|
module_pci_driver(mei_me_driver);
|
|
|
|
MODULE_AUTHOR("Intel Corporation");
|
|
MODULE_DESCRIPTION("Intel(R) Management Engine Interface");
|
|
MODULE_LICENSE("GPL v2");
|