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Date: Wed, 6 Feb 2013 14:06:39 +0200
From: Tomas Winkler <tomas.winkler@...el.com>
To: gregkh@...uxfoundation.org
Cc: arnd@...db.de, alan@...ux.intel.com, linux-kernel@...r.kernel.org,
Tomas Winkler <tomas.winkler@...el.com>
Subject: [char-misc-next 1/6] 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: Tomas Winkler <tomas.winkler@...el.com>
---
drivers/misc/mei/Makefile | 1 +
drivers/misc/mei/main.c | 354 ++--------------------------------------
drivers/misc/mei/mei_dev.h | 3 +
drivers/misc/mei/pci-me.c | 393 ++++++++++++++++++++++++++++++++++++++++++++
4 files changed, 409 insertions(+), 342 deletions(-)
create mode 100644 drivers/misc/mei/pci-me.c
diff --git a/drivers/misc/mei/Makefile b/drivers/misc/mei/Makefile
index 9f71933..068f553 100644
--- a/drivers/misc/mei/Makefile
+++ b/drivers/misc/mei/Makefile
@@ -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
diff --git a/drivers/misc/mei/main.c b/drivers/misc/mei/main.c
index 123c663..018623c 100644
--- a/drivers/misc/mei/main.c
+++ b/drivers/misc/mei/main.c
@@ -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, ®);
- /* 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 = 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_misc_device.parent = dev;
+ return misc_register(&mei_misc_device);
}
-/**
- * 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");
diff --git a/drivers/misc/mei/mei_dev.h b/drivers/misc/mei/mei_dev.h
index d6589d0..3b2bca3 100644
--- a/drivers/misc/mei/mei_dev.h
+++ b/drivers/misc/mei/mei_dev.h
@@ -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, \
diff --git a/drivers/misc/mei/pci-me.c b/drivers/misc/mei/pci-me.c
new file mode 100644
index 0000000..eaed398
--- /dev/null
+++ b/drivers/misc/mei/pci-me.c
@@ -0,0 +1,393 @@
+/*
+ *
+ * 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, ®);
+ /* 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");
--
1.7.4.4
--
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