diff options
Diffstat (limited to 'drivers/misc')
| -rw-r--r-- | drivers/misc/mei/Makefile | 1 | ||||
| -rw-r--r-- | drivers/misc/mei/main.c | 354 | ||||
| -rw-r--r-- | drivers/misc/mei/mei_dev.h | 3 | ||||
| -rw-r--r-- | drivers/misc/mei/pci-me.c | 393 |
4 files changed, 409 insertions, 342 deletions
diff --git a/drivers/misc/mei/Makefile b/drivers/misc/mei/Makefile index 9f719339e59..068f5535481 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 123c663509e..018623c9a8e 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 d6589d0d305..3b2bca386e5 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 00000000000..eaed398bed6 --- /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"); |