[linux-block.git] / drivers / misc / mei / pci-me.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"

/* 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;
	struct mei_me_hw *hw;
	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_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(&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, hw->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;
	struct mei_me_hw *hw;

	if (mei_pdev != pdev)
		return;

	dev = pci_get_drvdata(pdev);
	if (!dev)
		return;

	hw = to_me_hw(dev);


	dev_err(&pdev->dev, "stop\n");
	mei_stop(dev);

	mei_pdev = NULL;

	/* 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);

	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);

	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_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_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");
Commit	Line	Data
2703d4b2 TW	1	/*
	2	*
	3	* Intel Management Engine Interface (Intel MEI) Linux driver
	4	* Copyright (c) 2003-2012, Intel Corporation.
	5	*
	6	* This program is free software; you can redistribute it and/or modify it
	7	* under the terms and conditions of the GNU General Public License,
	8	* version 2, as published by the Free Software Foundation.
	9	*
	10	* This program is distributed in the hope it will be useful, but WITHOUT
	11	* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
	12	* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
	13	* more details.
	14	*
	15	*/
	16
	17	#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
	18
	19	#include <linux/module.h>
	20	#include <linux/moduleparam.h>
	21	#include <linux/kernel.h>
	22	#include <linux/device.h>
	23	#include <linux/fs.h>
	24	#include <linux/errno.h>
	25	#include <linux/types.h>
	26	#include <linux/fcntl.h>
	27	#include <linux/aio.h>
	28	#include <linux/pci.h>
	29	#include <linux/poll.h>
	30	#include <linux/init.h>
	31	#include <linux/ioctl.h>
	32	#include <linux/cdev.h>
	33	#include <linux/sched.h>
	34	#include <linux/uuid.h>
	35	#include <linux/compat.h>
	36	#include <linux/jiffies.h>
	37	#include <linux/interrupt.h>
	38	#include <linux/miscdevice.h>
	39
	40	#include <linux/mei.h>
	41
	42	#include "mei_dev.h"
	43	#include "hw-me.h"
	44	#include "client.h"
	45
	46	/* AMT device is a singleton on the platform */
	47	static struct pci_dev *mei_pdev;
	48
	49	/* mei_pci_tbl - PCI Device ID Table */
	50	static DEFINE_PCI_DEVICE_TABLE(mei_pci_tbl) = {
	51	{PCI_DEVICE(PCI_VENDOR_ID_INTEL, MEI_DEV_ID_82946GZ)},
	52	{PCI_DEVICE(PCI_VENDOR_ID_INTEL, MEI_DEV_ID_82G35)},
	53	{PCI_DEVICE(PCI_VENDOR_ID_INTEL, MEI_DEV_ID_82Q965)},
	54	{PCI_DEVICE(PCI_VENDOR_ID_INTEL, MEI_DEV_ID_82G965)},
	55	{PCI_DEVICE(PCI_VENDOR_ID_INTEL, MEI_DEV_ID_82GM965)},
	56	{PCI_DEVICE(PCI_VENDOR_ID_INTEL, MEI_DEV_ID_82GME965)},
	57	{PCI_DEVICE(PCI_VENDOR_ID_INTEL, MEI_DEV_ID_ICH9_82Q35)},
	58	{PCI_DEVICE(PCI_VENDOR_ID_INTEL, MEI_DEV_ID_ICH9_82G33)},
	59	{PCI_DEVICE(PCI_VENDOR_ID_INTEL, MEI_DEV_ID_ICH9_82Q33)},
	60	{PCI_DEVICE(PCI_VENDOR_ID_INTEL, MEI_DEV_ID_ICH9_82X38)},
	61	{PCI_DEVICE(PCI_VENDOR_ID_INTEL, MEI_DEV_ID_ICH9_3200)},
	62	{PCI_DEVICE(PCI_VENDOR_ID_INTEL, MEI_DEV_ID_ICH9_6)},
	63	{PCI_DEVICE(PCI_VENDOR_ID_INTEL, MEI_DEV_ID_ICH9_7)},
	64	{PCI_DEVICE(PCI_VENDOR_ID_INTEL, MEI_DEV_ID_ICH9_8)},
65	{PCI_DEVICE(PCI_VENDOR_ID_INTEL, MEI_DEV_ID_ICH9_9)},
66	{PCI_DEVICE(PCI_VENDOR_ID_INTEL, MEI_DEV_ID_ICH9_10)},
67	{PCI_DEVICE(PCI_VENDOR_ID_INTEL, MEI_DEV_ID_ICH9M_1)},
68	{PCI_DEVICE(PCI_VENDOR_ID_INTEL, MEI_DEV_ID_ICH9M_2)},
69	{PCI_DEVICE(PCI_VENDOR_ID_INTEL, MEI_DEV_ID_ICH9M_3)},
70	{PCI_DEVICE(PCI_VENDOR_ID_INTEL, MEI_DEV_ID_ICH9M_4)},
71	{PCI_DEVICE(PCI_VENDOR_ID_INTEL, MEI_DEV_ID_ICH10_1)},
72	{PCI_DEVICE(PCI_VENDOR_ID_INTEL, MEI_DEV_ID_ICH10_2)},
73	{PCI_DEVICE(PCI_VENDOR_ID_INTEL, MEI_DEV_ID_ICH10_3)},
74	{PCI_DEVICE(PCI_VENDOR_ID_INTEL, MEI_DEV_ID_ICH10_4)},
75	{PCI_DEVICE(PCI_VENDOR_ID_INTEL, MEI_DEV_ID_IBXPK_1)},
76	{PCI_DEVICE(PCI_VENDOR_ID_INTEL, MEI_DEV_ID_IBXPK_2)},
77	{PCI_DEVICE(PCI_VENDOR_ID_INTEL, MEI_DEV_ID_CPT_1)},
78	{PCI_DEVICE(PCI_VENDOR_ID_INTEL, MEI_DEV_ID_PBG_1)},
79	{PCI_DEVICE(PCI_VENDOR_ID_INTEL, MEI_DEV_ID_PPT_1)},
80	{PCI_DEVICE(PCI_VENDOR_ID_INTEL, MEI_DEV_ID_PPT_2)},
81	{PCI_DEVICE(PCI_VENDOR_ID_INTEL, MEI_DEV_ID_PPT_3)},
82	{PCI_DEVICE(PCI_VENDOR_ID_INTEL, MEI_DEV_ID_LPT)},
83	{PCI_DEVICE(PCI_VENDOR_ID_INTEL, MEI_DEV_ID_LPT_LP)},
84
85	/* required last entry */
86	{0, }
87	};
88
89	MODULE_DEVICE_TABLE(pci, mei_pci_tbl);
90
91	static DEFINE_MUTEX(mei_mutex);
92
2703d4b2 TW	93	/**
	94	* mei_quirk_probe - probe for devices that doesn't valid ME interface
	95	* @pdev: PCI device structure
	96	* @ent: entry into pci_device_table
	97	*
	98	* returns true if ME Interface is valid, false otherwise
	99	*/
	100	static bool mei_quirk_probe(struct pci_dev *pdev,
	101	const struct pci_device_id *ent)
	102	{
	103	u32 reg;
	104	if (ent->device == MEI_DEV_ID_PBG_1) {
	105	pci_read_config_dword(pdev, 0x48, &reg);
	106	/* make sure that bit 9 is up and bit 10 is down */
	107	if ((reg & 0x600) == 0x200) {
	108	dev_info(&pdev->dev, "Device doesn't have valid ME Interface\n");
	109	return false;
	110	}
	111	}
	112	return true;
	113	}
	114	/**
	115	* mei_probe - Device Initialization Routine
	116	*
	117	* @pdev: PCI device structure
	118	* @ent: entry in kcs_pci_tbl
	119	*
	120	* returns 0 on success, <0 on failure.
	121	*/
52c34561	122	static int mei_probe(struct pci_dev pdev, const struct pci_device_id ent)
2703d4b2 TW	123	{
2703d4b2 TW	124	struct mei_device *dev;
52c34561	125	struct mei_me_hw *hw;
2703d4b2 TW	126	int err;
	127
	128	mutex_lock(&mei_mutex);
	129
	130	if (!mei_quirk_probe(pdev, ent)) {
	131	err = -ENODEV;
	132	goto end;
	133	}
	134
	135	if (mei_pdev) {
	136	err = -EEXIST;
	137	goto end;
	138	}
	139	/* enable pci dev */
	140	err = pci_enable_device(pdev);
	141	if (err) {
	142	dev_err(&pdev->dev, "failed to enable pci device.\n");
	143	goto end;
	144	}
	145	/* set PCI host mastering */
	146	pci_set_master(pdev);
	147	/* pci request regions for mei driver */
	148	err = pci_request_regions(pdev, KBUILD_MODNAME);
	149	if (err) {
	150	dev_err(&pdev->dev, "failed to get pci regions.\n");
	151	goto disable_device;
	152	}
	153	/* allocates and initializes the mei dev structure */
52c34561	154	dev = mei_me_dev_init(pdev);
2703d4b2 TW	155	if (!dev) {
	156	err = -ENOMEM;
	157	goto release_regions;
	158	}
52c34561	159	hw = to_me_hw(dev);
2703d4b2	160	/* mapping IO device memory */
52c34561 TW	161	hw->mem_addr = pci_iomap(pdev, 0, 0);
52c34561 TW	162	if (!hw->mem_addr) {
2703d4b2 TW	163	dev_err(&pdev->dev, "mapping I/O device memory failure.\n");
	164	err = -ENOMEM;
	165	goto free_device;
	166	}
	167	pci_enable_msi(pdev);
	168
	169	/* request and enable interrupt */
	170	if (pci_dev_msi_enabled(pdev))
	171	err = request_threaded_irq(pdev->irq,
	172	NULL,
06ecd645	173	mei_me_irq_thread_handler,
2703d4b2 TW	174	IRQF_ONESHOT, KBUILD_MODNAME, dev);
	175	else
	176	err = request_threaded_irq(pdev->irq,
06ecd645 TW	177	mei_me_irq_quick_handler,
06ecd645 TW	178	mei_me_irq_thread_handler,
2703d4b2 TW	179	IRQF_SHARED, KBUILD_MODNAME, dev);
	180
	181	if (err) {
	182	dev_err(&pdev->dev, "request_threaded_irq failure. irq = %d\n",
	183	pdev->irq);
	184	goto disable_msi;
	185	}
	186
c4d589be	187	if (mei_start(dev)) {
2703d4b2 TW	188	dev_err(&pdev->dev, "init hw failure.\n");
	189	err = -ENODEV;
	190	goto release_irq;
	191	}
	192
	193	err = mei_register(&pdev->dev);
	194	if (err)
	195	goto release_irq;
	196
	197	mei_pdev = pdev;
	198	pci_set_drvdata(pdev, dev);
	199
	200
	201	schedule_delayed_work(&dev->timer_work, HZ);
	202
	203	mutex_unlock(&mei_mutex);
	204
	205	pr_debug("initialization successful.\n");
	206
	207	return 0;
	208
	209	release_irq:
	210	mei_disable_interrupts(dev);
	211	flush_scheduled_work();
	212	free_irq(pdev->irq, dev);
	213	disable_msi:
	214	pci_disable_msi(pdev);
52c34561	215	pci_iounmap(pdev, hw->mem_addr);
2703d4b2 TW	216	free_device:
	217	kfree(dev);
	218	release_regions:
	219	pci_release_regions(pdev);
	220	disable_device:
	221	pci_disable_device(pdev);
	222	end:
	223	mutex_unlock(&mei_mutex);
	224	dev_err(&pdev->dev, "initialization failed.\n");
	225	return err;
	226	}
	227
	228	/**
	229	* mei_remove - Device Removal Routine
	230	*
	231	* @pdev: PCI device structure
	232	*
	233	* mei_remove is called by the PCI subsystem to alert the driver
	234	* that it should release a PCI device.
	235	*/
	236	static void mei_remove(struct pci_dev *pdev)
	237	{
	238	struct mei_device *dev;
52c34561	239	struct mei_me_hw *hw;
2703d4b2 TW	240
	241	if (mei_pdev != pdev)
	242	return;
	243
	244	dev = pci_get_drvdata(pdev);
	245	if (!dev)
	246	return;
	247
52c34561 TW	248	hw = to_me_hw(dev);
52c34561 TW	249
2703d4b2	250
7cb035d9 TW	251	dev_err(&pdev->dev, "stop\n");
7cb035d9 TW	252	mei_stop(dev);
2703d4b2 TW	253
2703d4b2 TW	254	mei_pdev = NULL;
2703d4b2	255
2703d4b2 TW	256	/* disable interrupts */
	257	mei_disable_interrupts(dev);
	258
	259	free_irq(pdev->irq, dev);
	260	pci_disable_msi(pdev);
	261	pci_set_drvdata(pdev, NULL);
	262
52c34561 TW	263	if (hw->mem_addr)
52c34561 TW	264	pci_iounmap(pdev, hw->mem_addr);
2703d4b2 TW	265
	266	kfree(dev);
	267
	268	pci_release_regions(pdev);
	269	pci_disable_device(pdev);
	270
	271	mei_deregister();
	272
	273	}
	274	#ifdef CONFIG_PM
	275	static int mei_pci_suspend(struct device *device)
	276	{
	277	struct pci_dev *pdev = to_pci_dev(device);
	278	struct mei_device *dev = pci_get_drvdata(pdev);
2703d4b2 TW	279
	280	if (!dev)
	281	return -ENODEV;
2703d4b2	282
7cb035d9	283	dev_err(&pdev->dev, "suspend\n");
2703d4b2	284
7cb035d9 TW	285	mei_stop(dev);
	286
	287	mei_disable_interrupts(dev);
2703d4b2 TW	288
	289	free_irq(pdev->irq, dev);
	290	pci_disable_msi(pdev);
	291
7cb035d9	292	return 0;
2703d4b2 TW	293	}
	294
	295	static int mei_pci_resume(struct device *device)
	296	{
	297	struct pci_dev *pdev = to_pci_dev(device);
	298	struct mei_device *dev;
	299	int err;
	300
	301	dev = pci_get_drvdata(pdev);
	302	if (!dev)
	303	return -ENODEV;
	304
	305	pci_enable_msi(pdev);
	306
	307	/* request and enable interrupt */
	308	if (pci_dev_msi_enabled(pdev))
	309	err = request_threaded_irq(pdev->irq,
	310	NULL,
06ecd645	311	mei_me_irq_thread_handler,
2703d4b2 TW	312	IRQF_ONESHOT, KBUILD_MODNAME, dev);
	313	else
	314	err = request_threaded_irq(pdev->irq,
06ecd645 TW	315	mei_me_irq_quick_handler,
06ecd645 TW	316	mei_me_irq_thread_handler,
2703d4b2 TW	317	IRQF_SHARED, KBUILD_MODNAME, dev);
	318
	319	if (err) {
	320	dev_err(&pdev->dev, "request_threaded_irq failed: irq = %d.\n",
	321	pdev->irq);
	322	return err;
	323	}
	324
	325	mutex_lock(&dev->device_lock);
	326	dev->dev_state = MEI_DEV_POWER_UP;
	327	mei_reset(dev, 1);
	328	mutex_unlock(&dev->device_lock);
	329
	330	/* Start timer if stopped in suspend */
	331	schedule_delayed_work(&dev->timer_work, HZ);
	332
	333	return err;
	334	}
	335	static SIMPLE_DEV_PM_OPS(mei_pm_ops, mei_pci_suspend, mei_pci_resume);
	336	#define MEI_PM_OPS (&mei_pm_ops)
	337	#else
	338	#define MEI_PM_OPS NULL
	339	#endif /* CONFIG_PM */
	340	/*
	341	* PCI driver structure
	342	*/
	343	static struct pci_driver mei_driver = {
	344	.name = KBUILD_MODNAME,
	345	.id_table = mei_pci_tbl,
	346	.probe = mei_probe,
	347	.remove = mei_remove,
	348	.shutdown = mei_remove,
	349	.driver.pm = MEI_PM_OPS,
	350	};
	351
	352	module_pci_driver(mei_driver);
	353
	354	MODULE_AUTHOR("Intel Corporation");
	355	MODULE_DESCRIPTION("Intel(R) Management Engine Interface");
	356	MODULE_LICENSE("GPL v2");