drivers/misc/mic/host/mic_main.c - arm/linux - Git at Google

 /*
  * Intel MIC Platform Software Stack (MPSS)
  *
  * Copyright(c) 2013 Intel Corporation.
  *
  * This program is free software; you can redistribute it and/or modify
  * it under the terms of the GNU General Public License, version 2, as
  * published by the Free Software Foundation.
  *
  * This program is distributed in the hope that 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.
  *
  * The full GNU General Public License is included in this distribution in
  * the file called "COPYING".
  *
  * Intel MIC Host driver.
  */
 #include <linux/fs.h>
 #include <linux/module.h>
 #include <linux/pci.h>
 #include <linux/poll.h>

 #include <linux/mic_common.h>
 #include "../common/mic_dev.h"
 #include "mic_device.h"
 #include "mic_x100.h"
 #include "mic_smpt.h"

 static const char mic_driver_name[] = "mic";

 static const struct pci_device_id mic_pci_tbl[] = {
 	{PCI_DEVICE(PCI_VENDOR_ID_INTEL, MIC_X100_PCI_DEVICE_2250)},
 	{PCI_DEVICE(PCI_VENDOR_ID_INTEL, MIC_X100_PCI_DEVICE_2251)},
 	{PCI_DEVICE(PCI_VENDOR_ID_INTEL, MIC_X100_PCI_DEVICE_2252)},
 	{PCI_DEVICE(PCI_VENDOR_ID_INTEL, MIC_X100_PCI_DEVICE_2253)},
 	{PCI_DEVICE(PCI_VENDOR_ID_INTEL, MIC_X100_PCI_DEVICE_2254)},
 	{PCI_DEVICE(PCI_VENDOR_ID_INTEL, MIC_X100_PCI_DEVICE_2255)},
 	{PCI_DEVICE(PCI_VENDOR_ID_INTEL, MIC_X100_PCI_DEVICE_2256)},
 	{PCI_DEVICE(PCI_VENDOR_ID_INTEL, MIC_X100_PCI_DEVICE_2257)},
 	{PCI_DEVICE(PCI_VENDOR_ID_INTEL, MIC_X100_PCI_DEVICE_2258)},
 	{PCI_DEVICE(PCI_VENDOR_ID_INTEL, MIC_X100_PCI_DEVICE_2259)},
 	{PCI_DEVICE(PCI_VENDOR_ID_INTEL, MIC_X100_PCI_DEVICE_225a)},
 	{PCI_DEVICE(PCI_VENDOR_ID_INTEL, MIC_X100_PCI_DEVICE_225b)},
 	{PCI_DEVICE(PCI_VENDOR_ID_INTEL, MIC_X100_PCI_DEVICE_225c)},
 	{PCI_DEVICE(PCI_VENDOR_ID_INTEL, MIC_X100_PCI_DEVICE_225d)},
 	{PCI_DEVICE(PCI_VENDOR_ID_INTEL, MIC_X100_PCI_DEVICE_225e)},

 	/* required last entry */
 	{ 0, }
 };

 MODULE_DEVICE_TABLE(pci, mic_pci_tbl);

 /* ID allocator for MIC devices */
 static struct ida g_mic_ida;

 /* Initialize the device page */
 static int mic_dp_init(struct mic_device *mdev)
 {
 	mdev->dp = kzalloc(MIC_DP_SIZE, GFP_KERNEL);
 	if (!mdev->dp)
 		return -ENOMEM;

 	mdev->dp_dma_addr = mic_map_single(mdev,
 		mdev->dp, MIC_DP_SIZE);
 	if (mic_map_error(mdev->dp_dma_addr)) {
 		kfree(mdev->dp);
 		dev_err(&mdev->pdev->dev, "%s %d err %d\n",
 			__func__, __LINE__, -ENOMEM);
 		return -ENOMEM;
 	}
 	mdev->ops->write_spad(mdev, MIC_DPLO_SPAD, mdev->dp_dma_addr);
 	mdev->ops->write_spad(mdev, MIC_DPHI_SPAD, mdev->dp_dma_addr >> 32);
 	return 0;
 }

 /* Uninitialize the device page */
 static void mic_dp_uninit(struct mic_device *mdev)
 {
 	mic_unmap_single(mdev, mdev->dp_dma_addr, MIC_DP_SIZE);
 	kfree(mdev->dp);
 }

 /**
  * mic_ops_init: Initialize HW specific operation tables.
  *
  * @mdev: pointer to mic_device instance
  *
  * returns none.
  */
 static void mic_ops_init(struct mic_device *mdev)
 {
 	switch (mdev->family) {
 	case MIC_FAMILY_X100:
 		mdev->ops = &mic_x100_ops;
 		mdev->intr_ops = &mic_x100_intr_ops;
 		mdev->smpt_ops = &mic_x100_smpt_ops;
 		break;
 	default:
 		break;
 	}
 }

 /**
  * mic_get_family - Determine hardware family to which this MIC belongs.
  *
  * @pdev: The pci device structure
  *
  * returns family.
  */
 static enum mic_hw_family mic_get_family(struct pci_dev *pdev)
 {
 	enum mic_hw_family family;

 	switch (pdev->device) {
 	case MIC_X100_PCI_DEVICE_2250:
 	case MIC_X100_PCI_DEVICE_2251:
 	case MIC_X100_PCI_DEVICE_2252:
 	case MIC_X100_PCI_DEVICE_2253:
 	case MIC_X100_PCI_DEVICE_2254:
 	case MIC_X100_PCI_DEVICE_2255:
 	case MIC_X100_PCI_DEVICE_2256:
 	case MIC_X100_PCI_DEVICE_2257:
 	case MIC_X100_PCI_DEVICE_2258:
 	case MIC_X100_PCI_DEVICE_2259:
 	case MIC_X100_PCI_DEVICE_225a:
 	case MIC_X100_PCI_DEVICE_225b:
 	case MIC_X100_PCI_DEVICE_225c:
 	case MIC_X100_PCI_DEVICE_225d:
 	case MIC_X100_PCI_DEVICE_225e:
 		family = MIC_FAMILY_X100;
 		break;
 	default:
 		family = MIC_FAMILY_UNKNOWN;
 		break;
 	}
 	return family;
 }

 /**
  * mic_device_init - Allocates and initializes the MIC device structure
  *
  * @mdev: pointer to mic_device instance
  * @pdev: The pci device structure
  *
  * returns none.
  */
 static void
 mic_device_init(struct mic_device *mdev, struct pci_dev *pdev)
 {
 	mdev->pdev = pdev;
 	mdev->family = mic_get_family(pdev);
 	mdev->stepping = pdev->revision;
 	mic_ops_init(mdev);
 	mutex_init(&mdev->mic_mutex);
 	mdev->irq_info.next_avail_src = 0;
 }

 /**
  * mic_probe - Device Initialization Routine
  *
  * @pdev: PCI device structure
  * @ent: entry in mic_pci_tbl
  *
  * returns 0 on success, < 0 on failure.
  */
 static int mic_probe(struct pci_dev *pdev,
 		     const struct pci_device_id *ent)
 {
 	int rc;
 	struct mic_device *mdev;

 	mdev = kzalloc(sizeof(*mdev), GFP_KERNEL);
 	if (!mdev) {
 		rc = -ENOMEM;
 		dev_err(&pdev->dev, "mdev kmalloc failed rc %d\n", rc);
 		goto mdev_alloc_fail;
 	}
 	mdev->id = ida_simple_get(&g_mic_ida, 0, MIC_MAX_NUM_DEVS, GFP_KERNEL);
 	if (mdev->id < 0) {
 		rc = mdev->id;
 		dev_err(&pdev->dev, "ida_simple_get failed rc %d\n", rc);
 		goto ida_fail;
 	}

 	mic_device_init(mdev, pdev);

 	rc = pci_enable_device(pdev);
 	if (rc) {
 		dev_err(&pdev->dev, "failed to enable pci device.\n");
 		goto ida_remove;
 	}

 	pci_set_master(pdev);

 	rc = pci_request_regions(pdev, mic_driver_name);
 	if (rc) {
 		dev_err(&pdev->dev, "failed to get pci regions.\n");
 		goto disable_device;
 	}

 	rc = pci_set_dma_mask(pdev, DMA_BIT_MASK(64));
 	if (rc) {
 		dev_err(&pdev->dev, "Cannot set DMA mask\n");
 		goto release_regions;
 	}

 	mdev->mmio.pa = pci_resource_start(pdev, mdev->ops->mmio_bar);
 	mdev->mmio.len = pci_resource_len(pdev, mdev->ops->mmio_bar);
 	mdev->mmio.va = pci_ioremap_bar(pdev, mdev->ops->mmio_bar);
 	if (!mdev->mmio.va) {
 		dev_err(&pdev->dev, "Cannot remap MMIO BAR\n");
 		rc = -EIO;
 		goto release_regions;
 	}

 	mdev->aper.pa = pci_resource_start(pdev, mdev->ops->aper_bar);
 	mdev->aper.len = pci_resource_len(pdev, mdev->ops->aper_bar);
 	mdev->aper.va = ioremap_wc(mdev->aper.pa, mdev->aper.len);
 	if (!mdev->aper.va) {
 		dev_err(&pdev->dev, "Cannot remap Aperture BAR\n");
 		rc = -EIO;
 		goto unmap_mmio;
 	}

 	mdev->intr_ops->intr_init(mdev);
 	rc = mic_setup_interrupts(mdev, pdev);
 	if (rc) {
 		dev_err(&pdev->dev, "mic_setup_interrupts failed %d\n", rc);
 		goto unmap_aper;
 	}
 	rc = mic_smpt_init(mdev);
 	if (rc) {
 		dev_err(&pdev->dev, "smpt_init failed %d\n", rc);
 		goto free_interrupts;
 	}

 	pci_set_drvdata(pdev, mdev);

 	rc = mic_dp_init(mdev);
 	if (rc) {
 		dev_err(&pdev->dev, "mic_dp_init failed rc %d\n", rc);
 		goto smpt_uninit;
 	}
 	mic_bootparam_init(mdev);
 	mic_create_debug_dir(mdev);

 	mdev->cosm_dev = cosm_register_device(&mdev->pdev->dev, &cosm_hw_ops);
 	if (IS_ERR(mdev->cosm_dev)) {
 		rc = PTR_ERR(mdev->cosm_dev);
 		dev_err(&pdev->dev, "cosm_add_device failed rc %d\n", rc);
 		goto cleanup_debug_dir;
 	}
 	return 0;
 cleanup_debug_dir:
 	mic_delete_debug_dir(mdev);
 	mic_dp_uninit(mdev);
 smpt_uninit:
 	mic_smpt_uninit(mdev);
 free_interrupts:
 	mic_free_interrupts(mdev, pdev);
 unmap_aper:
 	iounmap(mdev->aper.va);
 unmap_mmio:
 	iounmap(mdev->mmio.va);
 release_regions:
 	pci_release_regions(pdev);
 disable_device:
 	pci_disable_device(pdev);
 ida_remove:
 	ida_simple_remove(&g_mic_ida, mdev->id);
 ida_fail:
 	kfree(mdev);
 mdev_alloc_fail:
 	dev_err(&pdev->dev, "Probe failed rc %d\n", rc);
 	return rc;
 }

 /**
  * mic_remove - Device Removal Routine
  * mic_remove is called by the PCI subsystem to alert the driver
  * that it should release a PCI device.
  *
  * @pdev: PCI device structure
  */
 static void mic_remove(struct pci_dev *pdev)
 {
 	struct mic_device *mdev;

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

 	cosm_unregister_device(mdev->cosm_dev);
 	mic_delete_debug_dir(mdev);
 	mic_dp_uninit(mdev);
 	mic_smpt_uninit(mdev);
 	mic_free_interrupts(mdev, pdev);
 	iounmap(mdev->aper.va);
 	iounmap(mdev->mmio.va);
 	pci_release_regions(pdev);
 	pci_disable_device(pdev);
 	ida_simple_remove(&g_mic_ida, mdev->id);
 	kfree(mdev);
 }

 static struct pci_driver mic_driver = {
 	.name = mic_driver_name,
 	.id_table = mic_pci_tbl,
 	.probe = mic_probe,
 	.remove = mic_remove
 };

 static int __init mic_init(void)
 {
 	int ret;

 	request_module("mic_x100_dma");
 	mic_init_debugfs();
 	ida_init(&g_mic_ida);
 	ret = pci_register_driver(&mic_driver);
 	if (ret) {
 		pr_err("pci_register_driver failed ret %d\n", ret);
 		goto cleanup_debugfs;
 	}
 	return 0;
 cleanup_debugfs:
 	ida_destroy(&g_mic_ida);
 	mic_exit_debugfs();
 	return ret;
 }

 static void __exit mic_exit(void)
 {
 	pci_unregister_driver(&mic_driver);
 	ida_destroy(&g_mic_ida);
 	mic_exit_debugfs();
 }

 module_init(mic_init);
 module_exit(mic_exit);

 MODULE_AUTHOR("Intel Corporation");
 MODULE_DESCRIPTION("Intel(R) MIC X100 Host driver");
 MODULE_LICENSE("GPL v2");
	/*
	* Intel MIC Platform Software Stack (MPSS)
	*
	* Copyright(c) 2013 Intel Corporation.
	*
	* This program is free software; you can redistribute it and/or modify
	* it under the terms of the GNU General Public License, version 2, as
	* published by the Free Software Foundation.
	*
	* This program is distributed in the hope that 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.
	*
	* The full GNU General Public License is included in this distribution in
	* the file called "COPYING".
	*
	* Intel MIC Host driver.
	*/
	#include <linux/fs.h>
	#include <linux/module.h>
	#include <linux/pci.h>
	#include <linux/poll.h>

	#include <linux/mic_common.h>
	#include "../common/mic_dev.h"
	#include "mic_device.h"
	#include "mic_x100.h"
	#include "mic_smpt.h"

	static const char mic_driver_name[] = "mic";

	static const struct pci_device_id mic_pci_tbl[] = {
	{PCI_DEVICE(PCI_VENDOR_ID_INTEL, MIC_X100_PCI_DEVICE_2250)},
	{PCI_DEVICE(PCI_VENDOR_ID_INTEL, MIC_X100_PCI_DEVICE_2251)},
	{PCI_DEVICE(PCI_VENDOR_ID_INTEL, MIC_X100_PCI_DEVICE_2252)},
	{PCI_DEVICE(PCI_VENDOR_ID_INTEL, MIC_X100_PCI_DEVICE_2253)},
	{PCI_DEVICE(PCI_VENDOR_ID_INTEL, MIC_X100_PCI_DEVICE_2254)},
	{PCI_DEVICE(PCI_VENDOR_ID_INTEL, MIC_X100_PCI_DEVICE_2255)},
	{PCI_DEVICE(PCI_VENDOR_ID_INTEL, MIC_X100_PCI_DEVICE_2256)},
	{PCI_DEVICE(PCI_VENDOR_ID_INTEL, MIC_X100_PCI_DEVICE_2257)},
	{PCI_DEVICE(PCI_VENDOR_ID_INTEL, MIC_X100_PCI_DEVICE_2258)},
	{PCI_DEVICE(PCI_VENDOR_ID_INTEL, MIC_X100_PCI_DEVICE_2259)},
	{PCI_DEVICE(PCI_VENDOR_ID_INTEL, MIC_X100_PCI_DEVICE_225a)},
	{PCI_DEVICE(PCI_VENDOR_ID_INTEL, MIC_X100_PCI_DEVICE_225b)},
	{PCI_DEVICE(PCI_VENDOR_ID_INTEL, MIC_X100_PCI_DEVICE_225c)},
	{PCI_DEVICE(PCI_VENDOR_ID_INTEL, MIC_X100_PCI_DEVICE_225d)},
	{PCI_DEVICE(PCI_VENDOR_ID_INTEL, MIC_X100_PCI_DEVICE_225e)},

	/* required last entry */
	{ 0, }
	};

	MODULE_DEVICE_TABLE(pci, mic_pci_tbl);

	/* ID allocator for MIC devices */
	static struct ida g_mic_ida;

	/* Initialize the device page */
	static int mic_dp_init(struct mic_device *mdev)
	{
	mdev->dp = kzalloc(MIC_DP_SIZE, GFP_KERNEL);
	if (!mdev->dp)
	return -ENOMEM;

	mdev->dp_dma_addr = mic_map_single(mdev,
	mdev->dp, MIC_DP_SIZE);
	if (mic_map_error(mdev->dp_dma_addr)) {
	kfree(mdev->dp);
	dev_err(&mdev->pdev->dev, "%s %d err %d\n",
	__func__, __LINE__, -ENOMEM);
	return -ENOMEM;
	}
	mdev->ops->write_spad(mdev, MIC_DPLO_SPAD, mdev->dp_dma_addr);
	mdev->ops->write_spad(mdev, MIC_DPHI_SPAD, mdev->dp_dma_addr >> 32);
	return 0;
	}

	/* Uninitialize the device page */
	static void mic_dp_uninit(struct mic_device *mdev)
	{
	mic_unmap_single(mdev, mdev->dp_dma_addr, MIC_DP_SIZE);
	kfree(mdev->dp);
	}

	/**
	* mic_ops_init: Initialize HW specific operation tables.
	*
	* @mdev: pointer to mic_device instance
	*
	* returns none.
	*/
	static void mic_ops_init(struct mic_device *mdev)
	{
	switch (mdev->family) {
	case MIC_FAMILY_X100:
	mdev->ops = &mic_x100_ops;
	mdev->intr_ops = &mic_x100_intr_ops;
	mdev->smpt_ops = &mic_x100_smpt_ops;
	break;
	default:
	break;
	}
	}

	/**
	* mic_get_family - Determine hardware family to which this MIC belongs.
	*
	* @pdev: The pci device structure
	*
	* returns family.
	*/
	static enum mic_hw_family mic_get_family(struct pci_dev *pdev)
	{
	enum mic_hw_family family;

	switch (pdev->device) {
	case MIC_X100_PCI_DEVICE_2250:
	case MIC_X100_PCI_DEVICE_2251:
	case MIC_X100_PCI_DEVICE_2252:
	case MIC_X100_PCI_DEVICE_2253:
	case MIC_X100_PCI_DEVICE_2254:
	case MIC_X100_PCI_DEVICE_2255:
	case MIC_X100_PCI_DEVICE_2256:
	case MIC_X100_PCI_DEVICE_2257:
	case MIC_X100_PCI_DEVICE_2258:
	case MIC_X100_PCI_DEVICE_2259:
	case MIC_X100_PCI_DEVICE_225a:
	case MIC_X100_PCI_DEVICE_225b:
	case MIC_X100_PCI_DEVICE_225c:
	case MIC_X100_PCI_DEVICE_225d:
	case MIC_X100_PCI_DEVICE_225e:
	family = MIC_FAMILY_X100;
	break;
	default:
	family = MIC_FAMILY_UNKNOWN;
	break;
	}
	return family;
	}

	/**
	* mic_device_init - Allocates and initializes the MIC device structure
	*
	* @mdev: pointer to mic_device instance
	* @pdev: The pci device structure
	*
	* returns none.
	*/
	static void
	mic_device_init(struct mic_device mdev, struct pci_dev pdev)
	{
	mdev->pdev = pdev;
	mdev->family = mic_get_family(pdev);
	mdev->stepping = pdev->revision;
	mic_ops_init(mdev);
	mutex_init(&mdev->mic_mutex);
	mdev->irq_info.next_avail_src = 0;
	}

	/**
	* mic_probe - Device Initialization Routine
	*
	* @pdev: PCI device structure
	* @ent: entry in mic_pci_tbl
	*
	* returns 0 on success, < 0 on failure.
	*/
	static int mic_probe(struct pci_dev *pdev,
	const struct pci_device_id *ent)
	{
	int rc;
	struct mic_device *mdev;

	mdev = kzalloc(sizeof(*mdev), GFP_KERNEL);
	if (!mdev) {
	rc = -ENOMEM;
	dev_err(&pdev->dev, "mdev kmalloc failed rc %d\n", rc);
	goto mdev_alloc_fail;
	}
	mdev->id = ida_simple_get(&g_mic_ida, 0, MIC_MAX_NUM_DEVS, GFP_KERNEL);
	if (mdev->id < 0) {
	rc = mdev->id;
	dev_err(&pdev->dev, "ida_simple_get failed rc %d\n", rc);
	goto ida_fail;
	}

	mic_device_init(mdev, pdev);

	rc = pci_enable_device(pdev);
	if (rc) {
	dev_err(&pdev->dev, "failed to enable pci device.\n");
	goto ida_remove;
	}

	pci_set_master(pdev);

	rc = pci_request_regions(pdev, mic_driver_name);
	if (rc) {
	dev_err(&pdev->dev, "failed to get pci regions.\n");
	goto disable_device;
	}

	rc = pci_set_dma_mask(pdev, DMA_BIT_MASK(64));
	if (rc) {
	dev_err(&pdev->dev, "Cannot set DMA mask\n");
	goto release_regions;
	}

	mdev->mmio.pa = pci_resource_start(pdev, mdev->ops->mmio_bar);
	mdev->mmio.len = pci_resource_len(pdev, mdev->ops->mmio_bar);
	mdev->mmio.va = pci_ioremap_bar(pdev, mdev->ops->mmio_bar);
	if (!mdev->mmio.va) {
	dev_err(&pdev->dev, "Cannot remap MMIO BAR\n");
	rc = -EIO;
	goto release_regions;
	}

	mdev->aper.pa = pci_resource_start(pdev, mdev->ops->aper_bar);
	mdev->aper.len = pci_resource_len(pdev, mdev->ops->aper_bar);
	mdev->aper.va = ioremap_wc(mdev->aper.pa, mdev->aper.len);
	if (!mdev->aper.va) {
	dev_err(&pdev->dev, "Cannot remap Aperture BAR\n");
	rc = -EIO;
	goto unmap_mmio;
	}

	mdev->intr_ops->intr_init(mdev);
	rc = mic_setup_interrupts(mdev, pdev);
	if (rc) {
	dev_err(&pdev->dev, "mic_setup_interrupts failed %d\n", rc);
	goto unmap_aper;
	}
	rc = mic_smpt_init(mdev);
	if (rc) {
	dev_err(&pdev->dev, "smpt_init failed %d\n", rc);
	goto free_interrupts;
	}

	pci_set_drvdata(pdev, mdev);

	rc = mic_dp_init(mdev);
	if (rc) {
	dev_err(&pdev->dev, "mic_dp_init failed rc %d\n", rc);
	goto smpt_uninit;
	}
	mic_bootparam_init(mdev);
	mic_create_debug_dir(mdev);

	mdev->cosm_dev = cosm_register_device(&mdev->pdev->dev, &cosm_hw_ops);
	if (IS_ERR(mdev->cosm_dev)) {
	rc = PTR_ERR(mdev->cosm_dev);
	dev_err(&pdev->dev, "cosm_add_device failed rc %d\n", rc);
	goto cleanup_debug_dir;
	}
	return 0;
	cleanup_debug_dir:
	mic_delete_debug_dir(mdev);
	mic_dp_uninit(mdev);
	smpt_uninit:
	mic_smpt_uninit(mdev);
	free_interrupts:
	mic_free_interrupts(mdev, pdev);
	unmap_aper:
	iounmap(mdev->aper.va);
	unmap_mmio:
	iounmap(mdev->mmio.va);
	release_regions:
	pci_release_regions(pdev);
	disable_device:
	pci_disable_device(pdev);
	ida_remove:
	ida_simple_remove(&g_mic_ida, mdev->id);
	ida_fail:
	kfree(mdev);
	mdev_alloc_fail:
	dev_err(&pdev->dev, "Probe failed rc %d\n", rc);
	return rc;
	}

	/**
	* mic_remove - Device Removal Routine
	* mic_remove is called by the PCI subsystem to alert the driver
	* that it should release a PCI device.
	*
	* @pdev: PCI device structure
	*/
	static void mic_remove(struct pci_dev *pdev)
	{
	struct mic_device *mdev;

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

	cosm_unregister_device(mdev->cosm_dev);
	mic_delete_debug_dir(mdev);
	mic_dp_uninit(mdev);
	mic_smpt_uninit(mdev);
	mic_free_interrupts(mdev, pdev);
	iounmap(mdev->aper.va);
	iounmap(mdev->mmio.va);
	pci_release_regions(pdev);
	pci_disable_device(pdev);
	ida_simple_remove(&g_mic_ida, mdev->id);
	kfree(mdev);
	}

	static struct pci_driver mic_driver = {
	.name = mic_driver_name,
	.id_table = mic_pci_tbl,
	.probe = mic_probe,
	.remove = mic_remove
	};

	static int __init mic_init(void)
	{
	int ret;

	request_module("mic_x100_dma");
	mic_init_debugfs();
	ida_init(&g_mic_ida);
	ret = pci_register_driver(&mic_driver);
	if (ret) {
	pr_err("pci_register_driver failed ret %d\n", ret);
	goto cleanup_debugfs;
	}
	return 0;
	cleanup_debugfs:
	ida_destroy(&g_mic_ida);
	mic_exit_debugfs();
	return ret;
	}

	static void __exit mic_exit(void)
	{
	pci_unregister_driver(&mic_driver);
	ida_destroy(&g_mic_ida);
	mic_exit_debugfs();
	}

	module_init(mic_init);
	module_exit(mic_exit);

	MODULE_AUTHOR("Intel Corporation");
	MODULE_DESCRIPTION("Intel(R) MIC X100 Host driver");
	MODULE_LICENSE("GPL v2");