| /* |
| * |
| * 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_me_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_H)}, |
| {PCI_DEVICE(PCI_VENDOR_ID_INTEL, MEI_DEV_ID_LPT_W)}, |
| {PCI_DEVICE(PCI_VENDOR_ID_INTEL, MEI_DEV_ID_LPT_LP)}, |
| {PCI_DEVICE(PCI_VENDOR_ID_INTEL, MEI_DEV_ID_LPT_HR)}, |
| {PCI_DEVICE(PCI_VENDOR_ID_INTEL, MEI_DEV_ID_WPT_LP)}, |
| |
| /* required last entry */ |
| {0, } |
| }; |
| |
| MODULE_DEVICE_TABLE(pci, mei_me_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_me_quirk_probe(struct pci_dev *pdev, |
| const struct pci_device_id *ent) |
| { |
| u32 reg; |
| /* Cougar Point || Patsburg */ |
| if (ent->device == MEI_DEV_ID_CPT_1 || |
| ent->device == MEI_DEV_ID_PBG_1) { |
| pci_read_config_dword(pdev, PCI_CFG_HFS_2, ®); |
| /* make sure that bit 9 (NM) is up and bit 10 (DM) is down */ |
| if ((reg & 0x600) == 0x200) |
| goto no_mei; |
| } |
| |
| /* Lynx Point */ |
| if (ent->device == MEI_DEV_ID_LPT_H || |
| ent->device == MEI_DEV_ID_LPT_W || |
| ent->device == MEI_DEV_ID_LPT_HR) { |
| /* Read ME FW Status check for SPS Firmware */ |
| pci_read_config_dword(pdev, PCI_CFG_HFS_1, ®); |
| /* if bits [19:16] = 15, running SPS Firmware */ |
| if ((reg & 0xf0000) == 0xf0000) |
| goto no_mei; |
| } |
| |
| return true; |
| |
| no_mei: |
| dev_info(&pdev->dev, "Device doesn't have valid ME Interface\n"); |
| return false; |
| } |
| /** |
| * 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_me_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_me_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(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_me_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); |
| |
| mei_deregister(dev); |
| |
| kfree(dev); |
| |
| pci_release_regions(pdev); |
| pci_disable_device(pdev); |
| |
| |
| } |
| #ifdef CONFIG_PM |
| static int mei_me_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_me_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_clear_interrupts(dev); |
| 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_me_pm_ops, mei_me_pci_suspend, mei_me_pci_resume); |
| #define MEI_ME_PM_OPS (&mei_me_pm_ops) |
| #else |
| #define MEI_ME_PM_OPS NULL |
| #endif /* CONFIG_PM */ |
| /* |
| * PCI driver structure |
| */ |
| static struct pci_driver mei_me_driver = { |
| .name = KBUILD_MODNAME, |
| .id_table = mei_me_pci_tbl, |
| .probe = mei_me_probe, |
| .remove = mei_me_remove, |
| .shutdown = mei_me_remove, |
| .driver.pm = MEI_ME_PM_OPS, |
| }; |
| |
| module_pci_driver(mei_me_driver); |
| |
| MODULE_AUTHOR("Intel Corporation"); |
| MODULE_DESCRIPTION("Intel(R) Management Engine Interface"); |
| MODULE_LICENSE("GPL v2"); |