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Commit 2703d4b2 authored by Tomas Winkler's avatar Tomas Winkler Committed by Greg Kroah-Hartman
Browse files

mei: sperate interface and pci code into two files 



leave misc file operations in the main
and move PCI related code into pci-me

Signed-off-by: default avatarTomas Winkler <tomas.winkler@intel.com>
Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
parent 890537b3

drivers/misc/mei/Makefile

+1 −0
Original line number Diff line number Diff line
@@ -11,3 +11,4 @@ mei-objs += main.o 
mei-objs += amthif.o

mei-objs += wd.o

mei-objs += client.o

mei-objs += pci-me.o

drivers/misc/mei/main.c

+12 −342
Original line number Diff line number Diff line
@@ -43,54 +43,6 @@ 
#include "hw-me.h"

#include "client.h"



/* AMT device is a singleton on the platform */

static struct pci_dev *mei_pdev;



/* mei_pci_tbl - PCI Device ID Table */

static DEFINE_PCI_DEVICE_TABLE(mei_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_pci_tbl);



static DEFINE_MUTEX(mei_mutex);





/**

 * mei_open - the open function

 *
@@ -101,15 +53,20 @@ static DEFINE_MUTEX(mei_mutex); 
 */

static int mei_open(struct inode *inode, struct file *file)

{

	struct miscdevice *misc = file->private_data;

	struct pci_dev *pdev;

	struct mei_cl *cl;

	struct mei_device *dev;



	int err;



	err = -ENODEV;

	if (!mei_pdev)

	if (!misc->parent)

		goto out;



	dev = pci_get_drvdata(mei_pdev);

	pdev = container_of(misc->parent, struct pci_dev, dev);



	dev = pci_get_drvdata(pdev);

	if (!dev)

		goto out;
@@ -787,7 +744,6 @@ static const struct file_operations mei_fops = { 
	.llseek = no_llseek

};





/*

 * Misc Device Struct

 */
@@ -797,302 +753,16 @@ static struct miscdevice mei_misc_device = { 
		.minor = MISC_DYNAMIC_MINOR,

};



/**

 * 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_quirk_probe(struct pci_dev *pdev,

				const struct pci_device_id *ent)

int mei_register(struct device *dev)

{

	u32 reg;

	if (ent->device == MEI_DEV_ID_PBG_1) {

		pci_read_config_dword(pdev, 0x48, &reg);

		/* 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;

	mei_misc_device.parent = dev;

	return misc_register(&mei_misc_device);

}

	}

	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_probe(struct pci_dev *pdev,

				const struct pci_device_id *ent)

{

	struct mei_device *dev;

	int err;



	mutex_lock(&mei_mutex);



	if (!mei_quirk_probe(pdev, ent)) {

		err = -ENODEV;

		goto end;

	}



	if (mei_pdev) {

		err = -EEXIST;

		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_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) {

		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_interrupt_thread_handler,

			IRQF_ONESHOT, KBUILD_MODNAME, dev);

	else

		err = request_threaded_irq(pdev->irq,

			mei_interrupt_quick_handler,

			mei_interrupt_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_hw_init(dev)) {

		dev_err(&pdev->dev, "init hw failure.\n");

		err = -ENODEV;

		goto release_irq;

	}



	err = misc_register(&mei_misc_device);

	if (err)

		goto release_irq;



	mei_pdev = 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:

	mei_disable_interrupts(dev);

	flush_scheduled_work();

	free_irq(pdev->irq, dev);

disable_msi:

	pci_disable_msi(pdev);

	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);

	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_remove(struct pci_dev *pdev)

void mei_deregister(void)

{

	struct mei_device *dev;



	if (mei_pdev != pdev)

		return;



	dev = pci_get_drvdata(pdev);

	if (!dev)

		return;



	mutex_lock(&dev->device_lock);



	cancel_delayed_work(&dev->timer_work);



	mei_wd_stop(dev);



	mei_pdev = NULL;



	if (dev->iamthif_cl.state == MEI_FILE_CONNECTED) {

		dev->iamthif_cl.state = MEI_FILE_DISCONNECTING;

		mei_cl_disconnect(&dev->iamthif_cl);

	}

	if (dev->wd_cl.state == MEI_FILE_CONNECTED) {

		dev->wd_cl.state = MEI_FILE_DISCONNECTING;

		mei_cl_disconnect(&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");



	if (dev->open_handle_count > 0)

		dev->open_handle_count--;

	mei_cl_unlink(&dev->wd_cl);



	if (dev->open_handle_count > 0)

		dev->open_handle_count--;

	mei_cl_unlink(&dev->iamthif_cl);



	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);



	misc_deregister(&mei_misc_device);

	mei_misc_device.parent = NULL;

}

#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);



	cancel_delayed_work(&dev->timer_work);



	/* Stop watchdog if exists */

	err = mei_wd_stop(dev);

	/* Set new mei state */

	if (dev->dev_state == MEI_DEV_ENABLED ||

	    dev->dev_state == MEI_DEV_RECOVERING_FROM_RESET) {

		dev->dev_state = MEI_DEV_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,

			IRQF_ONESHOT, KBUILD_MODNAME, dev);

	else

		err = request_threaded_irq(pdev->irq,

			mei_interrupt_quick_handler,

			mei_interrupt_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_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 = KBUILD_MODNAME,

	.id_table = mei_pci_tbl,

	.probe = mei_probe,

	.remove = mei_remove,

	.shutdown = mei_remove,

	.driver.pm = MEI_PM_OPS,

};



module_pci_driver(mei_driver);

MODULE_AUTHOR("Intel Corporation");

MODULE_DESCRIPTION("Intel(R) Management Engine Interface");

MODULE_LICENSE("GPL v2");

drivers/misc/mei/mei_dev.h

+3 −0
Original line number Diff line number Diff line
@@ -401,6 +401,9 @@ bool mei_me_is_ready(struct mei_device *dev); 






int mei_register(struct device *dev);

void mei_deregister(void);



#define MEI_HDR_FMT "hdr:host=%02d me=%02d len=%d comp=%1d"

#define MEI_HDR_PRM(hdr)                  \

	(hdr)->host_addr, (hdr)->me_addr, \

drivers/misc/mei/pci-me.c

0 → 100644
+393 −0
Original line number Diff line number Diff line 
/*

 *

 * 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"



/* AMT device is a singleton on the platform */

static struct pci_dev *mei_pdev;



/* mei_pci_tbl - PCI Device ID Table */

static DEFINE_PCI_DEVICE_TABLE(mei_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_pci_tbl);



static DEFINE_MUTEX(mei_mutex);





/**

 * 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_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, &reg);

		/* 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_probe(struct pci_dev *pdev,

				const struct pci_device_id *ent)

{

	struct mei_device *dev;

	int err;



	mutex_lock(&mei_mutex);



	if (!mei_quirk_probe(pdev, ent)) {

		err = -ENODEV;

		goto end;

	}



	if (mei_pdev) {

		err = -EEXIST;

		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_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) {

		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_interrupt_thread_handler,

			IRQF_ONESHOT, KBUILD_MODNAME, dev);

	else

		err = request_threaded_irq(pdev->irq,

			mei_interrupt_quick_handler,

			mei_interrupt_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_hw_init(dev)) {

		dev_err(&pdev->dev, "init hw failure.\n");

		err = -ENODEV;

		goto release_irq;

	}



	err = mei_register(&pdev->dev);

	if (err)

		goto release_irq;



	mei_pdev = 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:

	mei_disable_interrupts(dev);

	flush_scheduled_work();

	free_irq(pdev->irq, dev);

disable_msi:

	pci_disable_msi(pdev);

	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);

	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_remove(struct pci_dev *pdev)

{

	struct mei_device *dev;



	if (mei_pdev != pdev)

		return;



	dev = pci_get_drvdata(pdev);

	if (!dev)

		return;



	mutex_lock(&dev->device_lock);



	cancel_delayed_work(&dev->timer_work);



	mei_wd_stop(dev);



	mei_pdev = NULL;



	if (dev->iamthif_cl.state == MEI_FILE_CONNECTED) {

		dev->iamthif_cl.state = MEI_FILE_DISCONNECTING;

		mei_cl_disconnect(&dev->iamthif_cl);

	}

	if (dev->wd_cl.state == MEI_FILE_CONNECTED) {

		dev->wd_cl.state = MEI_FILE_DISCONNECTING;

		mei_cl_disconnect(&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");



	if (dev->open_handle_count > 0)

		dev->open_handle_count--;

	mei_cl_unlink(&dev->wd_cl);



	if (dev->open_handle_count > 0)

		dev->open_handle_count--;

	mei_cl_unlink(&dev->iamthif_cl);



	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);



	mei_deregister();



}

#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);



	cancel_delayed_work(&dev->timer_work);



	/* Stop watchdog if exists */

	err = mei_wd_stop(dev);

	/* Set new mei state */

	if (dev->dev_state == MEI_DEV_ENABLED ||

	    dev->dev_state == MEI_DEV_RECOVERING_FROM_RESET) {

		dev->dev_state = MEI_DEV_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,

			IRQF_ONESHOT, KBUILD_MODNAME, dev);

	else

		err = request_threaded_irq(pdev->irq,

			mei_interrupt_quick_handler,

			mei_interrupt_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_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 = KBUILD_MODNAME,

	.id_table = mei_pci_tbl,

	.probe = mei_probe,

	.remove = mei_remove,

	.shutdown = mei_remove,

	.driver.pm = MEI_PM_OPS,

};



module_pci_driver(mei_driver);



MODULE_AUTHOR("Intel Corporation");

MODULE_DESCRIPTION("Intel(R) Management Engine Interface");

MODULE_LICENSE("GPL v2");