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android-review.linaro.org / kernel / hikey-linaro / 22eb5aa6c7940861f9603581665b9d9a1c60be30 / . / drivers / staging / heci / heci_main.c
blob: 00e44c781428b0f5632df3ac08fc5d6bd7d45f91 [file] [log] [blame]
/*
* 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);