--- /dev/null
+/*
+ * Part of Intel(R) Manageability Engine Interface Linux driver
+ *
+ * Copyright (c) 2003 - 2008 Intel Corp.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ * notice, this list of conditions, and the following disclaimer,
+ * without modification.
+ * 2. Redistributions in binary form must reproduce at minimum a disclaimer
+ * substantially similar to the "NO WARRANTY" disclaimer below
+ * ("Disclaimer") and any redistribution must be conditioned upon
+ * including a substantially similar Disclaimer requirement for further
+ * binary redistribution.
+ * 3. Neither the names of the above-listed copyright holders nor the names
+ * of any contributors may be used to endorse or promote products derived
+ * from this software without specific prior written permission.
+ *
+ * Alternatively, this software may be distributed under the terms of the
+ * GNU General Public License ("GPL") version 2 as published by the Free
+ * Software Foundation.
+ *
+ * NO WARRANTY
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
+ * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
+ * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGES.
+ *
+ */
+
+
+#include <linux/module.h>
+#include <linux/moduleparam.h>
+#include <linux/kernel.h>
+#include <linux/slab.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/reboot.h>
+#include <linux/poll.h>
+#include <linux/init.h>
+#include <linux/kdev_t.h>
+#include <linux/ioctl.h>
+#include <linux/cdev.h>
+#include <linux/device.h>
+#include <linux/unistd.h>
+#include <linux/kthread.h>
+
+#include "heci.h"
+#include "heci_interface.h"
+#include "heci_version.h"
+
+
+#define HECI_READ_TIMEOUT 45
+
+#define HECI_DRIVER_NAME "heci"
+
+/*
+ * heci driver strings
+ */
+static char heci_driver_name[] = HECI_DRIVER_NAME;
+static char heci_driver_string[] = "Intel(R) Management Engine Interface";
+static char heci_driver_version[] = HECI_DRIVER_VERSION;
+static char heci_copyright[] = "Copyright (c) 2003 - 2008 Intel Corporation.";
+
+
+#ifdef HECI_DEBUG
+int heci_debug = 1;
+#else
+int heci_debug;
+#endif
+MODULE_PARM_DESC(heci_debug, "Debug enabled or not");
+module_param(heci_debug, int, 0644);
+
+
+#define HECI_DEV_NAME "heci"
+
+/* heci char device for registration */
+static struct cdev heci_cdev;
+
+/* major number for device */
+static int heci_major;
+/* The device pointer */
+static struct pci_dev *heci_device;
+
+static struct class *heci_class;
+
+
+/* heci_pci_tbl - PCI Device ID Table */
+static struct pci_device_id heci_pci_tbl[] = {
+ {PCI_DEVICE(PCI_VENDOR_ID_INTEL, HECI_DEV_ID_82946GZ)},
+ {PCI_DEVICE(PCI_VENDOR_ID_INTEL, HECI_DEV_ID_82G35)},
+ {PCI_DEVICE(PCI_VENDOR_ID_INTEL, HECI_DEV_ID_82Q965)},
+ {PCI_DEVICE(PCI_VENDOR_ID_INTEL, HECI_DEV_ID_82G965)},
+ {PCI_DEVICE(PCI_VENDOR_ID_INTEL, HECI_DEV_ID_82GM965)},
+ {PCI_DEVICE(PCI_VENDOR_ID_INTEL, HECI_DEV_ID_82GME965)},
+ {PCI_DEVICE(PCI_VENDOR_ID_INTEL, HECI_DEV_ID_ICH9_82Q35)},
+ {PCI_DEVICE(PCI_VENDOR_ID_INTEL, HECI_DEV_ID_ICH9_82G33)},
+ {PCI_DEVICE(PCI_VENDOR_ID_INTEL, HECI_DEV_ID_ICH9_82Q33)},
+ {PCI_DEVICE(PCI_VENDOR_ID_INTEL, HECI_DEV_ID_ICH9_82X38)},
+ {PCI_DEVICE(PCI_VENDOR_ID_INTEL, HECI_DEV_ID_ICH9_3200)},
+ {PCI_DEVICE(PCI_VENDOR_ID_INTEL, HECI_DEV_ID_ICH9_6)},
+ {PCI_DEVICE(PCI_VENDOR_ID_INTEL, HECI_DEV_ID_ICH9_7)},
+ {PCI_DEVICE(PCI_VENDOR_ID_INTEL, HECI_DEV_ID_ICH9_8)},
+ {PCI_DEVICE(PCI_VENDOR_ID_INTEL, HECI_DEV_ID_ICH9_9)},
+ {PCI_DEVICE(PCI_VENDOR_ID_INTEL, HECI_DEV_ID_ICH9_10)},
+ {PCI_DEVICE(PCI_VENDOR_ID_INTEL, HECI_DEV_ID_ICH9M_1)},
+ {PCI_DEVICE(PCI_VENDOR_ID_INTEL, HECI_DEV_ID_ICH9M_2)},
+ {PCI_DEVICE(PCI_VENDOR_ID_INTEL, HECI_DEV_ID_ICH9M_3)},
+ {PCI_DEVICE(PCI_VENDOR_ID_INTEL, HECI_DEV_ID_ICH9M_4)},
+ {PCI_DEVICE(PCI_VENDOR_ID_INTEL, HECI_DEV_ID_ICH10_1)},
+ {PCI_DEVICE(PCI_VENDOR_ID_INTEL, HECI_DEV_ID_ICH10_2)},
+ {PCI_DEVICE(PCI_VENDOR_ID_INTEL, HECI_DEV_ID_ICH10_3)},
+ {PCI_DEVICE(PCI_VENDOR_ID_INTEL, HECI_DEV_ID_ICH10_4)},
+ /* required last entry */
+ {0, }
+};
+
+MODULE_DEVICE_TABLE(pci, heci_pci_tbl);
+
+/*
+ * Local Function Prototypes
+ */
+static int __init heci_init_module(void);
+static void __exit heci_exit_module(void);
+static int __devinit heci_probe(struct pci_dev *pdev,
+ const struct pci_device_id *ent);
+static void __devexit heci_remove(struct pci_dev *pdev);
+static int heci_open(struct inode *inode, struct file *file);
+static int heci_release(struct inode *inode, struct file *file);
+static ssize_t heci_read(struct file *file, char __user *ubuf,
+ size_t length, loff_t *offset);
+static int heci_ioctl(struct inode *inode, struct file *file,
+ unsigned int cmd, unsigned long data);
+static ssize_t heci_write(struct file *file, const char __user *ubuf,
+ size_t length, loff_t *offset);
+static unsigned int heci_poll(struct file *file, poll_table *wait);
+static struct heci_cb_private *find_read_list_entry(
+ struct iamt_heci_device *dev,
+ struct heci_file_private *file_ext);
+#ifdef CONFIG_PM
+static int heci_suspend(struct pci_dev *pdev, pm_message_t state);
+static int heci_resume(struct pci_dev *pdev);
+static __u16 g_sus_wd_timeout;
+#else
+#define heci_suspend NULL
+#define heci_resume NULL
+#endif
+/*
+ * PCI driver structure
+ */
+static struct pci_driver heci_driver = {
+ .name = heci_driver_name,
+ .id_table = heci_pci_tbl,
+ .probe = heci_probe,
+ .remove = __devexit_p(heci_remove),
+ .shutdown = __devexit_p(heci_remove),
+ .suspend = heci_suspend,
+ .resume = heci_resume
+};
+
+/*
+ * file operations structure will be use heci char device.
+ */
+static const struct file_operations heci_fops = {
+ .owner = THIS_MODULE,
+ .read = heci_read,
+ .ioctl = heci_ioctl,
+ .open = heci_open,
+ .release = heci_release,
+ .write = heci_write,
+ .poll = heci_poll,
+};
+
+/**
+ * heci_registration_cdev - set up the cdev structure for heci device.
+ *
+ * @dev: char device struct
+ * @hminor: minor number for registration char device
+ * @fops: file operations structure
+ *
+ * returns 0 on success, <0 on failure.
+ */
+static int heci_registration_cdev(struct cdev *dev, int hminor,
+ const struct file_operations *fops)
+{
+ int ret, devno = MKDEV(heci_major, hminor);
+
+ cdev_init(dev, fops);
+ dev->owner = THIS_MODULE;
+ ret = cdev_add(dev, devno, 1);
+ /* Fail gracefully if need be */
+ if (ret) {
+ printk(KERN_ERR "heci: Error %d registering heci device %d\n",
+ ret, hminor);
+ }
+ return ret;
+}
+
+/* Display the version of heci driver. */
+static ssize_t version_show(struct class *dev, char *buf)
+{
+ return sprintf(buf, "%s %s.\n",
+ heci_driver_string, heci_driver_version);
+}
+
+static CLASS_ATTR(version, S_IRUGO, version_show, NULL);
+
+/**
+ * heci_register_cdev - registers heci char device
+ *
+ * returns 0 on success, <0 on failure.
+ */
+static int heci_register_cdev(void)
+{
+ int ret;
+ dev_t dev;
+
+ /* registration of char devices */
+ ret = alloc_chrdev_region(&dev, HECI_MINORS_BASE, HECI_MINORS_COUNT,
+ HECI_DRIVER_NAME);
+ if (ret) {
+ printk(KERN_ERR "heci: Error allocating char device region.\n");
+ return ret;
+ }
+
+ heci_major = MAJOR(dev);
+
+ ret = heci_registration_cdev(&heci_cdev, HECI_MINOR_NUMBER,
+ &heci_fops);
+ if (ret)
+ unregister_chrdev_region(MKDEV(heci_major, HECI_MINORS_BASE),
+ HECI_MINORS_COUNT);
+
+ return ret;
+}
+
+/**
+ * heci_unregister_cdev - unregisters heci char device
+ */
+static void heci_unregister_cdev(void)
+{
+ cdev_del(&heci_cdev);
+ unregister_chrdev_region(MKDEV(heci_major, HECI_MINORS_BASE),
+ HECI_MINORS_COUNT);
+}
+
+#ifndef HECI_DEVICE_CREATE
+#define HECI_DEVICE_CREATE device_create
+#endif
+/**
+ * heci_sysfs_device_create - adds device entry to sysfs
+ *
+ * returns 0 on success, <0 on failure.
+ */
+static int heci_sysfs_device_create(void)
+{
+ struct class *class;
+ void *tmphdev;
+ int err = 0;
+
+ class = class_create(THIS_MODULE, HECI_DRIVER_NAME);
+ if (IS_ERR(class)) {
+ err = PTR_ERR(class);
+ printk(KERN_ERR "heci: Error creating heci class.\n");
+ goto err_out;
+ }
+
+ err = class_create_file(class, &class_attr_version);
+ if (err) {
+ class_destroy(class);
+ printk(KERN_ERR "heci: Error creating heci class file.\n");
+ goto err_out;
+ }
+
+ tmphdev = HECI_DEVICE_CREATE(class, NULL, heci_cdev.dev, NULL,
+ HECI_DEV_NAME);
+ if (IS_ERR(tmphdev)) {
+ err = PTR_ERR(tmphdev);
+ class_remove_file(class, &class_attr_version);
+ class_destroy(class);
+ goto err_out;
+ }
+
+ heci_class = class;
+err_out:
+ return err;
+}
+
+/**
+ * heci_sysfs_device_remove - unregisters the device entry on sysfs
+ */
+static void heci_sysfs_device_remove(void)
+{
+ if ((heci_class == NULL) || (IS_ERR(heci_class)))
+ return;
+
+ device_destroy(heci_class, heci_cdev.dev);
+ class_remove_file(heci_class, &class_attr_version);
+ class_destroy(heci_class);
+}
+
+/**
+ * heci_init_module - Driver Registration Routine
+ *
+ * heci_init_module is the first routine called when the driver is
+ * loaded. All it does is register with the PCI subsystem.
+ *
+ * returns 0 on success, <0 on failure.
+ */
+static int __init heci_init_module(void)
+{
+ int ret = 0;
+
+ printk(KERN_INFO "heci: %s - version %s\n", heci_driver_string,
+ heci_driver_version);
+ printk(KERN_INFO "heci: %s\n", heci_copyright);
+
+ /* init pci module */
+ ret = pci_register_driver(&heci_driver);
+ if (ret < 0) {
+ printk(KERN_ERR "heci: Error registering driver.\n");
+ goto end;
+ }
+
+ ret = heci_register_cdev();
+ if (ret)
+ goto unregister_pci;
+
+ ret = heci_sysfs_device_create();
+ if (ret)
+ goto unregister_cdev;
+
+ return ret;
+
+unregister_cdev:
+ heci_unregister_cdev();
+unregister_pci:
+ pci_unregister_driver(&heci_driver);
+end:
+ return ret;
+}
+
+module_init(heci_init_module);
+
+
+/**
+ * heci_exit_module - Driver Exit Cleanup Routine
+ *
+ * heci_exit_module is called just before the driver is removed
+ * from memory.
+ */
+static void __exit heci_exit_module(void)
+{
+ pci_unregister_driver(&heci_driver);
+ heci_sysfs_device_remove();
+ heci_unregister_cdev();
+}
+
+module_exit(heci_exit_module);
+
+
+/**
+ * heci_probe - Device Initialization Routine
+ *
+ * @pdev: PCI device information struct
+ * @ent: entry in kcs_pci_tbl
+ *
+ * returns 0 on success, <0 on failure.
+ */
+static int __devinit heci_probe(struct pci_dev *pdev,
+ const struct pci_device_id *ent)
+{
+ struct iamt_heci_device *dev = NULL;
+ int i, err = 0;
+
+ if (heci_device) {
+ err = -EEXIST;
+ goto end;
+ }
+ /* enable pci dev */
+ err = pci_enable_device(pdev);
+ if (err) {
+ printk(KERN_ERR "heci: Failed to enable pci device.\n");
+ goto end;
+ }
+ /* set PCI host mastering */
+ pci_set_master(pdev);
+ /* pci request regions for heci driver */
+ err = pci_request_regions(pdev, heci_driver_name);
+ if (err) {
+ printk(KERN_ERR "heci: Failed to get pci regions.\n");
+ goto disable_device;
+ }
+ /* allocates and initializes the heci dev structure */
+ dev = init_heci_device(pdev);
+ if (!dev) {
+ err = -ENOMEM;
+ goto release_regions;
+ }
+ /* mapping IO device memory */
+ for (i = 0; i <= 5; i++) {
+ if (pci_resource_len(pdev, i) == 0)
+ continue;
+ if (pci_resource_flags(pdev, i) & IORESOURCE_IO) {
+ printk(KERN_ERR "heci: heci has IO ports.\n");
+ goto free_device;
+ } else if (pci_resource_flags(pdev, i) & IORESOURCE_MEM) {
+ if (dev->mem_base) {
+ printk(KERN_ERR
+ "heci: Too many mem addresses.\n");
+ goto free_device;
+ }
+ dev->mem_base = pci_resource_start(pdev, i);
+ dev->mem_length = pci_resource_len(pdev, i);
+ }
+ }
+ if (!dev->mem_base) {
+ printk(KERN_ERR "heci: No address to use.\n");
+ err = -ENODEV;
+ goto free_device;
+ }
+ dev->mem_addr = ioremap_nocache(dev->mem_base,
+ dev->mem_length);
+ if (!dev->mem_addr) {
+ printk(KERN_ERR "heci: Remap IO device memory failure.\n");
+ err = -ENOMEM;
+ goto free_device;
+ }
+ /* request and enable interrupt */
+ err = request_irq(pdev->irq, heci_isr_interrupt, IRQF_SHARED,
+ heci_driver_name, dev);
+ if (err) {
+ printk(KERN_ERR "heci: Request_irq failure. irq = %d \n",
+ pdev->irq);
+ goto unmap_memory;
+ }
+
+ if (heci_hw_init(dev)) {
+ printk(KERN_ERR "heci: Init hw failure.\n");
+ err = -ENODEV;
+ goto release_irq;
+ }
+ init_timer(&dev->wd_timer);
+
+ heci_initialize_clients(dev);
+ if (dev->heci_state != HECI_ENABLED) {
+ err = -ENODEV;
+ goto release_hw;
+ }
+
+ spin_lock_bh(&dev->device_lock);
+ heci_device = pdev;
+ pci_set_drvdata(pdev, dev);
+ spin_unlock_bh(&dev->device_lock);
+
+ if (dev->wd_timeout)
+ mod_timer(&dev->wd_timer, jiffies);
+
+#ifdef CONFIG_PM
+ g_sus_wd_timeout = 0;
+#endif
+ printk(KERN_INFO "heci driver initialization successful.\n");
+ return 0;
+
+release_hw:
+ /* disable interrupts */
+ dev->host_hw_state = read_heci_register(dev, H_CSR);
+ heci_csr_disable_interrupts(dev);
+
+ del_timer_sync(&dev->wd_timer);
+
+ flush_scheduled_work();
+
+release_irq:
+ free_irq(pdev->irq, dev);
+unmap_memory:
+ if (dev->mem_addr)
+ iounmap(dev->mem_addr);
+free_device:
+ kfree(dev);
+release_regions:
+ pci_release_regions(pdev);
+disable_device:
+ pci_disable_device(pdev);
+end:
+ printk(KERN_ERR "heci driver initialization failed.\n");
+ return err;
+}
+
+/**
+ * heci_remove - Device Removal Routine
+ *
+ * @pdev: PCI device information struct
+ *
+ * heci_remove is called by the PCI subsystem to alert the driver
+ * that it should release a PCI device.
+ */
+static void __devexit heci_remove(struct pci_dev *pdev)
+{
+ struct iamt_heci_device *dev = pci_get_drvdata(pdev);
+
+ if (heci_device != pdev)
+ return;
+
+ if (dev == NULL)
+ return;
+
+ spin_lock_bh(&dev->device_lock);
+ if (heci_device != pdev) {
+ spin_unlock_bh(&dev->device_lock);
+ return;
+ }
+
+ if (dev->reinit_tsk != NULL) {
+ kthread_stop(dev->reinit_tsk);
+ dev->reinit_tsk = NULL;
+ }
+
+ del_timer_sync(&dev->wd_timer);
+ if (dev->wd_file_ext.state == HECI_FILE_CONNECTED
+ && dev->wd_timeout) {
+ dev->wd_timeout = 0;
+ dev->wd_due_counter = 0;
+ memcpy(dev->wd_data, heci_stop_wd_params, HECI_WD_PARAMS_SIZE);
+ dev->stop = 1;
+ if (dev->host_buffer_is_empty &&
+ flow_ctrl_creds(dev, &dev->wd_file_ext)) {
+ dev->host_buffer_is_empty = 0;
+
+ if (!heci_send_wd(dev))
+ DBG("send stop WD failed\n");
+ else
+ flow_ctrl_reduce(dev, &dev->wd_file_ext);
+
+ dev->wd_pending = 0;
+ } else {
+ dev->wd_pending = 1;
+ }
+ dev->wd_stoped = 0;
+ spin_unlock_bh(&dev->device_lock);
+
+ wait_event_interruptible_timeout(dev->wait_stop_wd,
+ (dev->wd_stoped), 10 * HZ);
+ spin_lock_bh(&dev->device_lock);
+ if (!dev->wd_stoped)
+ DBG("stop wd failed to complete.\n");
+ else
+ DBG("stop wd complete.\n");
+
+ }
+
+ heci_device = NULL;
+ spin_unlock_bh(&dev->device_lock);
+
+ if (dev->iamthif_file_ext.state == HECI_FILE_CONNECTED) {
+ dev->iamthif_file_ext.state = HECI_FILE_DISCONNECTING;
+ heci_disconnect_host_client(dev,
+ &dev->iamthif_file_ext);
+ }
+ if (dev->wd_file_ext.state == HECI_FILE_CONNECTED) {
+ dev->wd_file_ext.state = HECI_FILE_DISCONNECTING;
+ heci_disconnect_host_client(dev,
+ &dev->wd_file_ext);
+ }
+
+ spin_lock_bh(&dev->device_lock);
+
+ /* remove entry if already in list */
+ DBG("list del iamthif and wd file list.\n");
+ heci_remove_client_from_file_list(dev, dev->wd_file_ext.
+ host_client_id);
+ heci_remove_client_from_file_list(dev,
+ dev->iamthif_file_ext.host_client_id);
+
+ dev->iamthif_current_cb = NULL;
+ dev->iamthif_file_ext.file = NULL;
+ dev->num_heci_me_clients = 0;
+
+ spin_unlock_bh(&dev->device_lock);
+
+ flush_scheduled_work();
+
+ /* disable interrupts */
+ heci_csr_disable_interrupts(dev);
+
+ free_irq(pdev->irq, dev);
+ pci_set_drvdata(pdev, NULL);
+
+ if (dev->mem_addr)
+ iounmap(dev->mem_addr);
+
+ kfree(dev);
+
+ pci_release_regions(pdev);
+ pci_disable_device(pdev);
+}
+
+/**
+ * heci_clear_list - remove all callbacks associated with file
+ * from heci_cb_list
+ *
+ * @file: file information struct
+ * @heci_cb_list: callbacks list
+ *
+ * heci_clear_list is called to clear resources associated with file
+ * when application calls close function or Ctrl-C was pressed
+ *
+ * returns 1 if callback removed from the list, 0 otherwise
+ */
+static int heci_clear_list(struct iamt_heci_device *dev,
+ struct file *file, struct list_head *heci_cb_list)
+{
+ struct heci_cb_private *priv_cb_pos = NULL;
+ struct heci_cb_private *priv_cb_next = NULL;
+ struct file *file_temp;
+ int rets = 0;
+
+ /* list all list member */
+ list_for_each_entry_safe(priv_cb_pos, priv_cb_next,
+ heci_cb_list, cb_list) {
+ file_temp = (struct file *)priv_cb_pos->file_object;
+ /* check if list member associated with a file */
+ if (file_temp == file) {
+ /* remove member from the list */
+ list_del(&priv_cb_pos->cb_list);
+ /* check if cb equal to current iamthif cb */
+ if (dev->iamthif_current_cb == priv_cb_pos) {
+ dev->iamthif_current_cb = NULL;
+ /* send flow control to iamthif client */
+ heci_send_flow_control(dev,
+ &dev->iamthif_file_ext);
+ }
+ /* free all allocated buffers */
+ heci_free_cb_private(priv_cb_pos);
+ rets = 1;
+ }
+ }
+ return rets;
+}
+
+/**
+ * heci_clear_lists - remove all callbacks associated with file
+ *
+ * @dev: device information struct
+ * @file: file information struct
+ *
+ * heci_clear_lists is called to clear resources associated with file
+ * when application calls close function or Ctrl-C was pressed
+ *
+ * returns 1 if callback removed from the list, 0 otherwise
+ */
+static int heci_clear_lists(struct iamt_heci_device *dev, struct file *file)
+{
+ int rets = 0;
+
+ /* remove callbacks associated with a file */
+ heci_clear_list(dev, file, &dev->pthi_cmd_list.heci_cb.cb_list);
+ if (heci_clear_list(dev, file,
+ &dev->pthi_read_complete_list.heci_cb.cb_list))
+ rets = 1;
+
+ heci_clear_list(dev, file, &dev->ctrl_rd_list.heci_cb.cb_list);
+
+ if (heci_clear_list(dev, file, &dev->ctrl_wr_list.heci_cb.cb_list))
+ rets = 1;
+
+ if (heci_clear_list(dev, file,
+ &dev->write_waiting_list.heci_cb.cb_list))
+ rets = 1;
+
+ if (heci_clear_list(dev, file, &dev->write_list.heci_cb.cb_list))
+ rets = 1;
+
+ /* check if iamthif_current_cb not NULL */
+ if (dev->iamthif_current_cb && (!rets)) {
+ /* check file and iamthif current cb association */
+ if (dev->iamthif_current_cb->file_object == file) {
+ /* remove cb */
+ heci_free_cb_private(dev->iamthif_current_cb);
+ dev->iamthif_current_cb = NULL;
+ rets = 1;
+ }
+ }
+ return rets;
+}
+
+/**
+ * heci_open - the open function
+ *
+ * @inode: pointer to inode structure
+ * @file: pointer to file structure
+ *
+ * returns 0 on success, <0 on error
+ */
+static int heci_open(struct inode *inode, struct file *file)
+{
+ struct heci_file_private *file_ext;
+ int if_num = iminor(inode);
+ struct iamt_heci_device *dev;
+
+ if (!heci_device)
+ return -ENODEV;
+
+ dev = pci_get_drvdata(heci_device);
+ if ((if_num != HECI_MINOR_NUMBER) || (!dev))
+ return -ENODEV;
+
+ file_ext = heci_alloc_file_private(file);
+ if (file_ext == NULL)
+ return -ENOMEM;
+
+ spin_lock_bh(&dev->device_lock);
+ if (dev->heci_state != HECI_ENABLED) {
+ spin_unlock_bh(&dev->device_lock);
+ kfree(file_ext);
+ return -ENODEV;
+ }
+ if (dev->open_handle_count >= HECI_MAX_OPEN_HANDLE_COUNT) {
+ spin_unlock_bh(&dev->device_lock);
+ kfree(file_ext);
+ return -ENFILE;
+ };
+ dev->open_handle_count++;
+ list_add_tail(&file_ext->link, &dev->file_list);
+ while ((dev->heci_host_clients[dev->current_host_client_id / 8]
+ & (1 << (dev->current_host_client_id % 8))) != 0) {
+
+ dev->current_host_client_id++; /* allow overflow */
+ DBG("current_host_client_id = %d\n",
+ dev->current_host_client_id);
+ DBG("dev->open_handle_count = %lu\n",
+ dev->open_handle_count);
+ }
+ DBG("current_host_client_id = %d\n", dev->current_host_client_id);
+ file_ext->host_client_id = dev->current_host_client_id;
+ dev->heci_host_clients[file_ext->host_client_id / 8] |=
+ (1 << (file_ext->host_client_id % 8));
+ spin_unlock_bh(&dev->device_lock);
+ spin_lock(&file_ext->file_lock);
+ file_ext->state = HECI_FILE_INITIALIZING;
+ file_ext->sm_state = 0;
+
+ file->private_data = file_ext;
+ spin_unlock(&file_ext->file_lock);
+
+ return 0;
+}
+
+/**
+ * heci_release - the release function
+ *
+ * @inode: pointer to inode structure
+ * @file: pointer to file structure
+ *
+ * returns 0 on success, <0 on error
+ */
+static int heci_release(struct inode *inode, struct file *file)
+{
+ int rets = 0;
+ int if_num = iminor(inode);
+ struct heci_file_private *file_ext = file->private_data;
+ struct heci_cb_private *priv_cb = NULL;
+ struct iamt_heci_device *dev;
+
+ if (!heci_device)
+ return -ENODEV;
+
+ dev = pci_get_drvdata(heci_device);
+ if ((if_num != HECI_MINOR_NUMBER) || (!dev) || (!file_ext))
+ return -ENODEV;
+
+ if (file_ext != &dev->iamthif_file_ext) {
+ spin_lock(&file_ext->file_lock);
+ if (file_ext->state == HECI_FILE_CONNECTED) {
+ file_ext->state = HECI_FILE_DISCONNECTING;
+ spin_unlock(&file_ext->file_lock);
+ DBG("disconnecting client host client = %d, "
+ "ME client = %d\n",
+ file_ext->host_client_id,
+ file_ext->me_client_id);
+ rets = heci_disconnect_host_client(dev, file_ext);
+ spin_lock(&file_ext->file_lock);
+ }
+ spin_lock_bh(&dev->device_lock);
+ heci_flush_queues(dev, file_ext);
+ DBG("remove client host client = %d, ME client = %d\n",
+ file_ext->host_client_id,
+ file_ext->me_client_id);
+
+ if (dev->open_handle_count > 0) {
+ dev->heci_host_clients[file_ext->host_client_id / 8] &=
+ ~(1 << (file_ext->host_client_id % 8));
+ dev->open_handle_count--;
+ }
+ heci_remove_client_from_file_list(dev,
+ file_ext->host_client_id);
+
+ /* free read cb */
+ if (file_ext->read_cb != NULL) {
+ priv_cb = find_read_list_entry(dev, file_ext);
+ /* Remove entry from read list */
+ if (priv_cb != NULL)
+ list_del(&priv_cb->cb_list);
+
+ priv_cb = file_ext->read_cb;
+ file_ext->read_cb = NULL;
+ }
+
+ spin_unlock_bh(&dev->device_lock);
+ file->private_data = NULL;
+ spin_unlock(&file_ext->file_lock);
+
+ if (priv_cb != NULL)
+ heci_free_cb_private(priv_cb);
+
+ kfree(file_ext);
+ } else {
+ spin_lock_bh(&dev->device_lock);
+
+ if (dev->open_handle_count > 0)
+ dev->open_handle_count--;
+
+ if (dev->iamthif_file_object == file
+ && dev->iamthif_state != HECI_IAMTHIF_IDLE) {
+ DBG("pthi canceled iamthif state %d\n",
+ dev->iamthif_state);
+ dev->iamthif_canceled = 1;
+ if (dev->iamthif_state == HECI_IAMTHIF_READ_COMPLETE) {
+ DBG("run next pthi iamthif cb\n");
+ run_next_iamthif_cmd(dev);
+ }
+ }
+
+ if (heci_clear_lists(dev, file))
+ dev->iamthif_state = HECI_IAMTHIF_IDLE;
+
+ spin_unlock_bh(&dev->device_lock);
+ }
+ return rets;
+}
+
+static struct heci_cb_private *find_read_list_entry(
+ struct iamt_heci_device *dev,
+ struct heci_file_private *file_ext)
+{
+ struct heci_cb_private *priv_cb_pos = NULL;
+ struct heci_cb_private *priv_cb_next = NULL;
+ struct heci_file_private *file_ext_list_temp;
+
+ if (dev->read_list.status == 0
+ && !list_empty(&dev->read_list.heci_cb.cb_list)) {
+ DBG("remove read_list CB \n");
+ list_for_each_entry_safe(priv_cb_pos,
+ priv_cb_next,
+ &dev->read_list.heci_cb.cb_list, cb_list) {
+
+ file_ext_list_temp = (struct heci_file_private *)
+ priv_cb_pos->file_private;
+
+ if ((file_ext_list_temp != NULL) &&
+ heci_fe_same_id(file_ext, file_ext_list_temp))
+ return priv_cb_pos;
+
+ }
+ }
+ return NULL;
+}
+
+/**
+ * heci_read - the read client message function.
+ *
+ * @file: pointer to file structure
+ * @ubuf: pointer to user buffer
+ * @length: buffer length
+ * @offset: data offset in buffer
+ *
+ * returns >=0 data length on success , <0 on error
+ */
+static ssize_t heci_read(struct file *file, char __user *ubuf,
+ size_t length, loff_t *offset)
+{
+ int i;
+ int rets = 0, err = 0;
+ int if_num = iminor(file->f_dentry->d_inode);
+ struct heci_file_private *file_ext = file->private_data;
+ struct heci_cb_private *priv_cb_pos = NULL;
+ struct heci_cb_private *priv_cb = NULL;
+ struct iamt_heci_device *dev;
+
+ if (!heci_device)
+ return -ENODEV;
+
+ dev = pci_get_drvdata(heci_device);
+ if ((if_num != HECI_MINOR_NUMBER) || (!dev) || (!file_ext))
+ return -ENODEV;
+
+ spin_lock_bh(&dev->device_lock);
+ if (dev->heci_state != HECI_ENABLED) {
+ spin_unlock_bh(&dev->device_lock);
+ return -ENODEV;
+ }
+ spin_unlock_bh(&dev->device_lock);
+
+ spin_lock(&file_ext->file_lock);
+ if ((file_ext->sm_state & HECI_WD_STATE_INDEPENDENCE_MSG_SENT) == 0) {
+ spin_unlock(&file_ext->file_lock);
+ /* Do not allow to read watchdog client */
+ for (i = 0; i < dev->num_heci_me_clients; i++) {
+ if (memcmp(&heci_wd_guid,
+ &dev->me_clients[i].props.protocol_name,
+ sizeof(struct guid)) == 0) {
+ if (file_ext->me_client_id ==
+ dev->me_clients[i].client_id)
+ return -EBADF;
+ }
+ }
+ } else {
+ file_ext->sm_state &= ~HECI_WD_STATE_INDEPENDENCE_MSG_SENT;
+ spin_unlock(&file_ext->file_lock);
+ }
+
+ if (file_ext == &dev->iamthif_file_ext) {
+ rets = pthi_read(dev, if_num, file, ubuf, length, offset);
+ goto out;
+ }
+
+ if (file_ext->read_cb && file_ext->read_cb->information > *offset) {
+ priv_cb = file_ext->read_cb;
+ goto copy_buffer;
+ } else if (file_ext->read_cb && file_ext->read_cb->information > 0 &&
+ file_ext->read_cb->information <= *offset) {
+ priv_cb = file_ext->read_cb;
+ rets = 0;
+ goto free;
+ } else if ((!file_ext->read_cb || file_ext->read_cb->information == 0)
+ && *offset > 0) {
+ /*Offset needs to be cleaned for contingous reads*/
+ *offset = 0;
+ rets = 0;
+ goto out;
+ }
+
+ spin_lock(&file_ext->read_io_lock);
+ err = heci_start_read(dev, if_num, file_ext);
+ if (err != 0 && err != -EBUSY) {
+ DBG("heci start read failure with status = %d\n", err);
+ spin_unlock(&file_ext->read_io_lock);
+ rets = err;
+ goto out;
+ }
+ if (HECI_READ_COMPLETE != file_ext->reading_state
+ && !waitqueue_active(&file_ext->rx_wait)) {
+ if (file->f_flags & O_NONBLOCK) {
+ rets = -EAGAIN;
+ spin_unlock(&file_ext->read_io_lock);
+ goto out;
+ }
+ spin_unlock(&file_ext->read_io_lock);
+
+ if (wait_event_interruptible(file_ext->rx_wait,
+ (HECI_READ_COMPLETE == file_ext->reading_state
+ || HECI_FILE_INITIALIZING == file_ext->state
+ || HECI_FILE_DISCONNECTED == file_ext->state
+ || HECI_FILE_DISCONNECTING == file_ext->state))) {
+ if (signal_pending(current)) {
+ rets = -EINTR;
+ goto out;
+ }
+ return -ERESTARTSYS;
+ }
+
+ if (HECI_FILE_INITIALIZING == file_ext->state ||
+ HECI_FILE_DISCONNECTED == file_ext->state ||
+ HECI_FILE_DISCONNECTING == file_ext->state) {
+ rets = -EBUSY;
+ goto out;
+ }
+ spin_lock(&file_ext->read_io_lock);
+ }
+
+ priv_cb = file_ext->read_cb;
+
+ if (!priv_cb) {
+ spin_unlock(&file_ext->read_io_lock);
+ return -ENODEV;
+ }
+ if (file_ext->reading_state != HECI_READ_COMPLETE) {
+ spin_unlock(&file_ext->read_io_lock);
+ return 0;
+ }
+ spin_unlock(&file_ext->read_io_lock);
+ /* now copy the data to user space */
+copy_buffer:
+ DBG("priv_cb->response_buffer size - %d\n",
+ priv_cb->response_buffer.size);
+ DBG("priv_cb->information - %lu\n",
+ priv_cb->information);
+ if (length == 0 || ubuf == NULL ||
+ *offset > priv_cb->information) {
+ rets = -EMSGSIZE;
+ goto free;
+ }
+
+ /* length is being turncated to PAGE_SIZE, however, */
+ /* information size may be longer */
+ length = (length < (priv_cb->information - *offset) ?
+ length : (priv_cb->information - *offset));
+
+ if (copy_to_user(ubuf,
+ priv_cb->response_buffer.data + *offset,
+ length)) {
+ rets = -EFAULT;
+ goto free;
+ }
+
+ rets = length;
+ *offset += length;
+ if ((unsigned long)*offset < priv_cb->information)
+ goto out;
+
+free:
+ spin_lock_bh(&dev->device_lock);
+ priv_cb_pos = find_read_list_entry(dev, file_ext);
+ /* Remove entry from read list */
+ if (priv_cb_pos != NULL)
+ list_del(&priv_cb_pos->cb_list);
+ spin_unlock_bh(&dev->device_lock);
+ heci_free_cb_private(priv_cb);
+ spin_lock(&file_ext->read_io_lock);
+ file_ext->reading_state = HECI_IDLE;
+ file_ext->read_cb = NULL;
+ file_ext->read_pending = 0;
+ spin_unlock(&file_ext->read_io_lock);
+out: DBG("end heci read rets= %d\n", rets);
+ return rets;
+}
+
+/**
+ * heci_write - the write function.
+ *
+ * @file: pointer to file structure
+ * @ubuf: pointer to user buffer
+ * @length: buffer length
+ * @offset: data offset in buffer
+ *
+ * returns >=0 data length on success , <0 on error
+ */
+static ssize_t heci_write(struct file *file, const char __user *ubuf,
+ size_t length, loff_t *offset)
+{
+ int rets = 0;
+ __u8 i;
+ int if_num = iminor(file->f_dentry->d_inode);
+ struct heci_file_private *file_ext = file->private_data;
+ struct heci_cb_private *priv_write_cb = NULL;
+ struct heci_msg_hdr heci_hdr;
+ struct iamt_heci_device *dev;
+ unsigned long currtime = get_seconds();
+
+ if (!heci_device)
+ return -ENODEV;
+
+ dev = pci_get_drvdata(heci_device);
+
+ if ((if_num != HECI_MINOR_NUMBER) || (!dev) || (!file_ext))
+ return -ENODEV;
+
+ spin_lock_bh(&dev->device_lock);
+
+ if (dev->heci_state != HECI_ENABLED) {
+ spin_unlock_bh(&dev->device_lock);
+ return -ENODEV;
+ }
+ if (file_ext == &dev->iamthif_file_ext) {
+ priv_write_cb = find_pthi_read_list_entry(dev, file);
+ if ((priv_write_cb != NULL) &&
+ (((currtime - priv_write_cb->read_time) >
+ IAMTHIF_READ_TIMER) ||
+ (file_ext->reading_state == HECI_READ_COMPLETE))) {
+ (*offset) = 0;
+ list_del(&priv_write_cb->cb_list);
+ heci_free_cb_private(priv_write_cb);
+ priv_write_cb = NULL;
+ }
+ }
+
+ /* free entry used in read */
+ if (file_ext->reading_state == HECI_READ_COMPLETE) {
+ *offset = 0;
+ priv_write_cb = find_read_list_entry(dev, file_ext);
+ if (priv_write_cb != NULL) {
+ list_del(&priv_write_cb->cb_list);
+ heci_free_cb_private(priv_write_cb);
+ priv_write_cb = NULL;
+ spin_lock(&file_ext->read_io_lock);
+ file_ext->reading_state = HECI_IDLE;
+ file_ext->read_cb = NULL;
+ file_ext->read_pending = 0;
+ spin_unlock(&file_ext->read_io_lock);
+ }
+ } else if (file_ext->reading_state == HECI_IDLE &&
+ file_ext->read_pending == 0)
+ (*offset) = 0;
+
+ spin_unlock_bh(&dev->device_lock);
+
+ priv_write_cb = kzalloc(sizeof(struct heci_cb_private), GFP_KERNEL);
+ if (!priv_write_cb)
+ return -ENOMEM;
+
+ priv_write_cb->file_object = file;
+ priv_write_cb->file_private = file_ext;
+ priv_write_cb->request_buffer.data = kmalloc(length, GFP_KERNEL);
+ if (!priv_write_cb->request_buffer.data) {
+ kfree(priv_write_cb);
+ return -ENOMEM;
+ }
+ DBG("length =%d\n", (int) length);
+
+ if (copy_from_user(priv_write_cb->request_buffer.data,
+ ubuf, length)) {
+ rets = -EFAULT;
+ goto fail;
+ }
+
+ spin_lock(&file_ext->file_lock);
+ file_ext->sm_state = 0;
+ if ((length == 4) &&
+ ((memcmp(heci_wd_state_independence_msg[0], ubuf, 4) == 0) ||
+ (memcmp(heci_wd_state_independence_msg[1], ubuf, 4) == 0) ||
+ (memcmp(heci_wd_state_independence_msg[2], ubuf, 4) == 0)))
+ file_ext->sm_state |= HECI_WD_STATE_INDEPENDENCE_MSG_SENT;
+ spin_unlock(&file_ext->file_lock);
+
+ INIT_LIST_HEAD(&priv_write_cb->cb_list);
+ if (file_ext == &dev->iamthif_file_ext) {
+ priv_write_cb->response_buffer.data =
+ kmalloc(IAMTHIF_MTU, GFP_KERNEL);
+ if (!priv_write_cb->response_buffer.data) {
+ rets = -ENOMEM;
+ goto fail;
+ }
+ spin_lock_bh(&dev->device_lock);
+ if (dev->heci_state != HECI_ENABLED) {
+ spin_unlock_bh(&dev->device_lock);
+ rets = -ENODEV;
+ goto fail;
+ }
+ for (i = 0; i < dev->num_heci_me_clients; i++) {
+ if (dev->me_clients[i].client_id ==
+ dev->iamthif_file_ext.me_client_id)
+ break;
+ }
+
+ BUG_ON(dev->me_clients[i].client_id != file_ext->me_client_id);
+ if ((i == dev->num_heci_me_clients) ||
+ (dev->me_clients[i].client_id !=
+ dev->iamthif_file_ext.me_client_id)) {
+
+ spin_unlock_bh(&dev->device_lock);
+ rets = -ENODEV;
+ goto fail;
+ } else if ((length > dev->me_clients[i].props.max_msg_length)
+ || (length <= 0)) {
+ spin_unlock_bh(&dev->device_lock);
+ rets = -EMSGSIZE;
+ goto fail;
+ }
+
+
+ priv_write_cb->response_buffer.size = IAMTHIF_MTU;
+ priv_write_cb->major_file_operations = HECI_IOCTL;
+ priv_write_cb->information = 0;
+ priv_write_cb->request_buffer.size = length;
+ if (dev->iamthif_file_ext.state != HECI_FILE_CONNECTED) {
+ spin_unlock_bh(&dev->device_lock);
+ rets = -ENODEV;
+ goto fail;
+ }
+
+ if (!list_empty(&dev->pthi_cmd_list.heci_cb.cb_list)
+ || dev->iamthif_state != HECI_IAMTHIF_IDLE) {
+ DBG("pthi_state = %d\n", (int) dev->iamthif_state);
+ DBG("add PTHI cb to pthi cmd waiting list\n");
+ list_add_tail(&priv_write_cb->cb_list,
+ &dev->pthi_cmd_list.heci_cb.cb_list);
+ rets = length;
+ } else {
+ DBG("call pthi write\n");
+ rets = pthi_write(dev, priv_write_cb);
+
+ if (rets != 0) {
+ DBG("pthi write failed with status = %d\n",
+ rets);
+ spin_unlock_bh(&dev->device_lock);
+ goto fail;
+ }
+ rets = length;
+ }
+ spin_unlock_bh(&dev->device_lock);
+ return rets;
+ }
+
+ priv_write_cb->major_file_operations = HECI_WRITE;
+ /* make sure information is zero before we start */
+
+ priv_write_cb->information = 0;
+ priv_write_cb->request_buffer.size = length;
+
+ spin_lock(&file_ext->write_io_lock);
+ DBG("host client = %d, ME client = %d\n",
+ file_ext->host_client_id, file_ext->me_client_id);
+ if (file_ext->state != HECI_FILE_CONNECTED) {
+ rets = -ENODEV;
+ DBG("host client = %d, is not connected to ME client = %d",
+ file_ext->host_client_id,
+ file_ext->me_client_id);
+
+ goto unlock;
+ }
+ for (i = 0; i < dev->num_heci_me_clients; i++) {
+ if (dev->me_clients[i].client_id ==
+ file_ext->me_client_id)
+ break;
+ }
+ BUG_ON(dev->me_clients[i].client_id != file_ext->me_client_id);
+ if (i == dev->num_heci_me_clients) {
+ rets = -ENODEV;
+ goto unlock;
+ }
+ if (length > dev->me_clients[i].props.max_msg_length || length <= 0) {
+ rets = -EINVAL;
+ goto unlock;
+ }
+ priv_write_cb->file_private = file_ext;
+
+ spin_lock_bh(&dev->device_lock);
+ if (flow_ctrl_creds(dev, file_ext) &&
+ dev->host_buffer_is_empty) {
+ spin_unlock_bh(&dev->device_lock);
+ dev->host_buffer_is_empty = 0;
+ if (length > ((((dev->host_hw_state & H_CBD) >> 24) *
+ sizeof(__u32)) - sizeof(struct heci_msg_hdr))) {
+
+ heci_hdr.length =
+ (((dev->host_hw_state & H_CBD) >> 24) *
+ sizeof(__u32)) -
+ sizeof(struct heci_msg_hdr);
+ heci_hdr.msg_complete = 0;
+ } else {
+ heci_hdr.length = length;
+ heci_hdr.msg_complete = 1;
+ }
+ heci_hdr.host_addr = file_ext->host_client_id;
+ heci_hdr.me_addr = file_ext->me_client_id;
+ heci_hdr.reserved = 0;
+ DBG("call heci_write_message header=%08x.\n",
+ *((__u32 *) &heci_hdr));
+ spin_unlock(&file_ext->write_io_lock);
+ /* protect heci low level write */
+ spin_lock_bh(&dev->device_lock);
+ if (!heci_write_message(dev, &heci_hdr,
+ (unsigned char *) (priv_write_cb->request_buffer.data),
+ heci_hdr.length)) {
+
+ spin_unlock_bh(&dev->device_lock);
+ heci_free_cb_private(priv_write_cb);
+ rets = -ENODEV;
+ priv_write_cb->information = 0;
+ return rets;
+ }
+ file_ext->writing_state = HECI_WRITING;
+ priv_write_cb->information = heci_hdr.length;
+ if (heci_hdr.msg_complete) {
+ flow_ctrl_reduce(dev, file_ext);
+ list_add_tail(&priv_write_cb->cb_list,
+ &dev->write_waiting_list.heci_cb.cb_list);
+ } else {
+ list_add_tail(&priv_write_cb->cb_list,
+ &dev->write_list.heci_cb.cb_list);
+ }
+ spin_unlock_bh(&dev->device_lock);
+
+ } else {
+
+ spin_unlock_bh(&dev->device_lock);
+ priv_write_cb->information = 0;
+ file_ext->writing_state = HECI_WRITING;
+ spin_unlock(&file_ext->write_io_lock);
+ list_add_tail(&priv_write_cb->cb_list,
+ &dev->write_list.heci_cb.cb_list);
+ }
+ return length;
+
+unlock:
+ spin_unlock(&file_ext->write_io_lock);
+fail:
+ heci_free_cb_private(priv_write_cb);
+ return rets;
+
+}
+
+/**
+ * heci_ioctl - the IOCTL function
+ *
+ * @inode: pointer to inode structure
+ * @file: pointer to file structure
+ * @cmd: ioctl command
+ * @data: pointer to heci message structure
+ *
+ * returns 0 on success , <0 on error
+ */
+static int heci_ioctl(struct inode *inode, struct file *file,
+ unsigned int cmd, unsigned long data)
+{
+ int rets = 0;
+ int if_num = iminor(inode);
+ struct heci_file_private *file_ext = file->private_data;
+ /* in user space */
+ struct heci_message_data __user *u_msg;
+ struct heci_message_data k_msg; /* all in kernel on the stack */
+ struct iamt_heci_device *dev;
+
+ if (!capable(CAP_SYS_ADMIN))
+ return -EPERM;
+
+ if (!heci_device)
+ return -ENODEV;
+
+ dev = pci_get_drvdata(heci_device);
+ if ((if_num != HECI_MINOR_NUMBER) || (!dev) || (!file_ext))
+ return -ENODEV;
+
+ spin_lock_bh(&dev->device_lock);
+ if (dev->heci_state != HECI_ENABLED) {
+ spin_unlock_bh(&dev->device_lock);
+ return -ENODEV;
+ }
+ spin_unlock_bh(&dev->device_lock);
+
+ /* first copy from user all data needed */
+ u_msg = (struct heci_message_data __user *)data;
+ if (copy_from_user(&k_msg, u_msg, sizeof(k_msg))) {
+ DBG("first copy from user all data needed filled\n");
+ return -EFAULT;
+ }
+ DBG("user message size is %d\n", k_msg.size);
+
+ switch (cmd) {
+ case IOCTL_HECI_GET_VERSION:
+ DBG(": IOCTL_HECI_GET_VERSION\n");
+ rets = heci_ioctl_get_version(dev, if_num, u_msg, k_msg,
+ file_ext);
+ break;
+
+ case IOCTL_HECI_CONNECT_CLIENT:
+ DBG(": IOCTL_HECI_CONNECT_CLIENT.\n");
+ rets = heci_ioctl_connect_client(dev, if_num, u_msg, k_msg,
+ file);
+ break;
+
+ case IOCTL_HECI_WD:
+ DBG(": IOCTL_HECI_WD.\n");
+ rets = heci_ioctl_wd(dev, if_num, k_msg, file_ext);
+ break;
+
+ case IOCTL_HECI_BYPASS_WD:
+ DBG(": IOCTL_HECI_BYPASS_WD.\n");
+ rets = heci_ioctl_bypass_wd(dev, if_num, k_msg, file_ext);
+ break;
+
+ default:
+ rets = -EINVAL;
+ break;
+ }
+ return rets;
+}
+
+/**
+ * heci_poll - the poll function
+ *
+ * @file: pointer to file structure
+ * @wait: pointer to poll_table structure
+ *
+ * returns poll mask
+ */
+static unsigned int heci_poll(struct file *file, poll_table *wait)
+{
+ int if_num = iminor(file->f_dentry->d_inode);
+ unsigned int mask = 0;
+ struct heci_file_private *file_ext = file->private_data;
+ struct iamt_heci_device *dev;
+
+ if (!heci_device)
+ return mask;
+
+ dev = pci_get_drvdata(heci_device);
+
+ if ((if_num != HECI_MINOR_NUMBER) || (!dev) || (!file_ext))
+ return mask;
+
+ spin_lock_bh(&dev->device_lock);
+ if (dev->heci_state != HECI_ENABLED) {
+ spin_unlock_bh(&dev->device_lock);
+ return mask;
+ }
+ spin_unlock_bh(&dev->device_lock);
+
+ if (file_ext == &dev->iamthif_file_ext) {
+ poll_wait(file, &dev->iamthif_file_ext.wait, wait);
+ spin_lock(&dev->iamthif_file_ext.file_lock);
+ if (dev->iamthif_state == HECI_IAMTHIF_READ_COMPLETE
+ && dev->iamthif_file_object == file) {
+ mask |= (POLLIN | POLLRDNORM);
+ spin_lock_bh(&dev->device_lock);
+ DBG("run next pthi cb\n");
+ run_next_iamthif_cmd(dev);
+ spin_unlock_bh(&dev->device_lock);
+ }
+ spin_unlock(&dev->iamthif_file_ext.file_lock);
+
+ } else{
+ poll_wait(file, &file_ext->tx_wait, wait);
+ spin_lock(&file_ext->write_io_lock);
+ if (HECI_WRITE_COMPLETE == file_ext->writing_state)
+ mask |= (POLLIN | POLLRDNORM);
+
+ spin_unlock(&file_ext->write_io_lock);
+ }
+
+ return mask;
+}
+
+#ifdef CONFIG_PM
+static int heci_suspend(struct pci_dev *pdev, pm_message_t state)
+{
+ struct iamt_heci_device *dev = pci_get_drvdata(pdev);
+ int err = 0;
+
+ spin_lock_bh(&dev->device_lock);
+ if (dev->reinit_tsk != NULL) {
+ kthread_stop(dev->reinit_tsk);
+ dev->reinit_tsk = NULL;
+ }
+ spin_unlock_bh(&dev->device_lock);
+
+ /* Stop watchdog if exists */
+ del_timer_sync(&dev->wd_timer);
+ if (dev->wd_file_ext.state == HECI_FILE_CONNECTED
+ && dev->wd_timeout) {
+ spin_lock_bh(&dev->device_lock);
+ g_sus_wd_timeout = dev->wd_timeout;
+ dev->wd_timeout = 0;
+ dev->wd_due_counter = 0;
+ memcpy(dev->wd_data, heci_stop_wd_params,
+ HECI_WD_PARAMS_SIZE);
+ dev->stop = 1;
+ if (dev->host_buffer_is_empty &&
+ flow_ctrl_creds(dev, &dev->wd_file_ext)) {
+ dev->host_buffer_is_empty = 0;
+ if (!heci_send_wd(dev))
+ DBG("send stop WD failed\n");
+ else
+ flow_ctrl_reduce(dev, &dev->wd_file_ext);
+
+ dev->wd_pending = 0;
+ } else {
+ dev->wd_pending = 1;
+ }
+ spin_unlock_bh(&dev->device_lock);
+ dev->wd_stoped = 0;
+
+ err = wait_event_interruptible_timeout(dev->wait_stop_wd,
+ (dev->wd_stoped),
+ 10 * HZ);
+ if (!dev->wd_stoped)
+ DBG("stop wd failed to complete.\n");
+ else {
+ DBG("stop wd complete %d.\n", err);
+ err = 0;
+ }
+ }
+ /* Set new heci state */
+ spin_lock_bh(&dev->device_lock);
+ if (dev->heci_state == HECI_ENABLED ||
+ dev->heci_state == HECI_RECOVERING_FROM_RESET) {
+ dev->heci_state = HECI_POWER_DOWN;
+ heci_reset(dev, 0);
+ }
+ spin_unlock_bh(&dev->device_lock);
+
+ pci_save_state(pdev);
+
+ pci_disable_device(pdev);
+ free_irq(pdev->irq, dev);
+
+ pci_set_power_state(pdev, PCI_D3hot);
+
+ return err;
+}
+
+static int heci_resume(struct pci_dev *pdev)
+{
+ struct iamt_heci_device *dev;
+ int err = 0;
+
+ pci_set_power_state(pdev, PCI_D0);
+ pci_restore_state(pdev);
+
+ dev = pci_get_drvdata(pdev);
+ if (!dev)
+ return -ENODEV;
+
+ /* request and enable interrupt */
+ err = request_irq(pdev->irq, heci_isr_interrupt, IRQF_SHARED,
+ heci_driver_name, dev);
+ if (err) {
+ printk(KERN_ERR "heci: Request_irq failure. irq = %d \n",
+ pdev->irq);
+ return err;
+ }
+
+ spin_lock_bh(&dev->device_lock);
+ dev->heci_state = HECI_POWER_UP;
+ heci_reset(dev, 1);
+ spin_unlock_bh(&dev->device_lock);
+
+ /* Start watchdog if stopped in suspend */
+ if (g_sus_wd_timeout != 0) {
+ dev->wd_timeout = g_sus_wd_timeout;
+
+ memcpy(dev->wd_data, heci_start_wd_params,
+ HECI_WD_PARAMS_SIZE);
+ memcpy(dev->wd_data + HECI_WD_PARAMS_SIZE,
+ &dev->wd_timeout, sizeof(__u16));
+ dev->wd_due_counter = 1;
+
+ if (dev->wd_timeout)
+ mod_timer(&dev->wd_timer, jiffies);
+
+ g_sus_wd_timeout = 0;
+ }
+ return err;
+}
+#endif
+
+MODULE_AUTHOR("Intel Corporation");
+MODULE_DESCRIPTION("Intel(R) Management Engine Interface");
+MODULE_LICENSE("Dual BSD/GPL");
+MODULE_VERSION(HECI_DRIVER_VERSION);
projects / linux-2.6-omap-h63xx.git / blobdiff