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@intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

1 files changed, 393 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..eaed398bed6b
--- /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, &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;
+	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");