1 files changed, 396 insertions, 0 deletions

diff --git a/drivers/misc/mei/pci-me.c b/drivers/misc/mei/pci-me.c
new file mode 100644
index 000000000000..b40ec0601ab0
--- /dev/null
+++ b/drivers/misc/mei/pci-me.c
@@ -0,0 +1,396 @@
+/*
+ *
+ * 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_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, 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);
+
+        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 (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);
+        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_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");