patch-2.4.27 linux-2.4.27/drivers/hotplug/shpchp_core.c

• Lines: 701
• Date: 2004-08-07 16:26:04.761351174 -0700
• Orig file: linux-2.4.26/drivers/hotplug/shpchp_core.c
• Orig date: 1969-12-31 16:00:00.000000000 -0800

diff -urN linux-2.4.26/drivers/hotplug/shpchp_core.c linux-2.4.27/drivers/hotplug/shpchp_core.c
@@ -0,0 +1,700 @@
+/*
+ * Standard Hot Plug Controller Driver
+ *
+ * Copyright (C) 1995,2001 Compaq Computer Corporation
+ * Copyright (C) 2001 Greg Kroah-Hartman (greg@kroah.com)
+ * Copyright (C) 2001 IBM Corp.
+ * Copyright (C) 2003-2004 Intel Corporation
+ *
+ * All rights reserved.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or (at
+ * your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, GOOD TITLE or
+ * NON INFRINGEMENT.  See the GNU General Public License for more
+ * details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+ *
+ * Send feedback to <greg@kroah.com>, <dely.l.sy@intel.com>
+ *
+ */
+
+#include <linux/config.h>
+#include <linux/module.h>
+#include <linux/kernel.h>
+#include <linux/types.h>
+#include <linux/proc_fs.h>
+#include <linux/miscdevice.h>
+#include <linux/slab.h>
+#include <linux/tqueue.h>
+#include <linux/pci.h>
+#include <linux/init.h>
+#include <asm/uaccess.h>
+#include "shpchp.h"
+#include "shpchprm.h"
+
+/* Global variables */
+int shpchp_debug;
+int shpchp_poll_mode;
+int shpchp_poll_time;
+struct controller *shpchp_ctrl_list;	/* = NULL */
+struct pci_func *shpchp_slot_list[256];
+
+#define DRIVER_VERSION	"0.4"
+#define DRIVER_AUTHOR	"Dan Zink <dan.zink@compaq.com>, Greg Kroah-Hartman <greg@kroah.com>, Dely Sy <dely.l.sy@intel.com>"
+#define DRIVER_DESC	"Standard Hot Plug PCI Controller Driver"
+
+MODULE_AUTHOR(DRIVER_AUTHOR);
+MODULE_DESCRIPTION(DRIVER_DESC);
+MODULE_LICENSE("GPL");
+
+MODULE_PARM(shpchp_debug, "i");
+MODULE_PARM(shpchp_poll_mode, "i");
+MODULE_PARM(shpchp_poll_time, "i");
+MODULE_PARM_DESC(shpchp_debug, "Debugging mode enabled or not");
+MODULE_PARM_DESC(shpchp_poll_mode, "Using polling mechanism for hot-plug events or not");
+MODULE_PARM_DESC(shpchp_poll_time, "Polling mechanism frequency, in seconds");
+
+#define SHPC_MODULE_NAME "shpchp.o"
+
+static int shpc_start_thread (void);
+static int set_attention_status (struct hotplug_slot *slot, u8 value);
+static int enable_slot		(struct hotplug_slot *slot);
+static int disable_slot		(struct hotplug_slot *slot);
+static int hardware_test	(struct hotplug_slot *slot, u32 value);
+static int get_power_status	(struct hotplug_slot *slot, u8 *value);
+static int get_attention_status	(struct hotplug_slot *slot, u8 *value);
+static int get_latch_status	(struct hotplug_slot *slot, u8 *value);
+static int get_adapter_status	(struct hotplug_slot *slot, u8 *value);
+static int get_max_bus_speed	(struct hotplug_slot *slot, enum pci_bus_speed *value);
+static int get_cur_bus_speed	(struct hotplug_slot *slot, enum pci_bus_speed *value);
+
+static struct hotplug_slot_ops shpchp_hotplug_slot_ops = {
+	.owner =		THIS_MODULE,
+	.set_attention_status =	set_attention_status,
+	.enable_slot =		enable_slot,
+	.disable_slot =		disable_slot,
+	.hardware_test =	hardware_test,
+	.get_power_status =	get_power_status,
+	.get_attention_status =	get_attention_status,
+	.get_latch_status =	get_latch_status,
+	.get_adapter_status =	get_adapter_status,
+  	.get_max_bus_speed =	get_max_bus_speed,
+  	.get_cur_bus_speed =	get_cur_bus_speed,
+};
+
+static int init_slots(struct controller *ctrl)
+{
+	struct slot *new_slot;
+	u8 number_of_slots;
+	u8 slot_device;
+	u32 slot_number, sun;
+	int result;
+
+	dbg("%s\n",__FUNCTION__);
+
+	number_of_slots = ctrl->num_slots;
+	slot_device = ctrl->slot_device_offset;
+	slot_number = ctrl->first_slot;
+
+	while (number_of_slots) {
+		new_slot = (struct slot *) kmalloc(sizeof(struct slot), GFP_KERNEL);
+		if (!new_slot)
+			return -ENOMEM;
+
+		memset(new_slot, 0, sizeof(struct slot));
+		new_slot->hotplug_slot = kmalloc (sizeof (struct hotplug_slot), GFP_KERNEL);
+		if (!new_slot->hotplug_slot) {
+			kfree (new_slot);
+			return -ENOMEM;
+		}
+		memset(new_slot->hotplug_slot, 0, sizeof (struct hotplug_slot));
+
+		new_slot->hotplug_slot->info = kmalloc (sizeof (struct hotplug_slot_info), GFP_KERNEL);
+		if (!new_slot->hotplug_slot->info) {
+			kfree (new_slot->hotplug_slot);
+			kfree (new_slot);
+			return -ENOMEM;
+		}
+		memset(new_slot->hotplug_slot->info, 0, sizeof (struct hotplug_slot_info));
+		new_slot->hotplug_slot->name = kmalloc (SLOT_NAME_SIZE, GFP_KERNEL);
+		if (!new_slot->hotplug_slot->name) {
+			kfree (new_slot->hotplug_slot->info);
+			kfree (new_slot->hotplug_slot);
+			kfree (new_slot);
+			return -ENOMEM;
+		}
+
+		new_slot->magic = SLOT_MAGIC;
+		new_slot->ctrl = ctrl;
+		new_slot->bus = ctrl->slot_bus;
+		new_slot->device = slot_device;
+		new_slot->hpc_ops = ctrl->hpc_ops;
+
+		if (shpchprm_get_physical_slot_number(ctrl, &sun, new_slot->bus, new_slot->device)) {
+			kfree (new_slot->hotplug_slot->info);
+			kfree (new_slot->hotplug_slot);
+			kfree (new_slot);
+			return -ENOMEM;
+		}
+
+		new_slot->number = sun;
+		new_slot->hp_slot = slot_device - ctrl->slot_device_offset;
+
+		/* Register this slot with the hotplug pci core */
+		new_slot->hotplug_slot->private = new_slot;
+		make_slot_name (new_slot->hotplug_slot->name, SLOT_NAME_SIZE, new_slot);
+		new_slot->hotplug_slot->ops = &shpchp_hotplug_slot_ops;
+
+		new_slot->hpc_ops->get_power_status(new_slot, &(new_slot->hotplug_slot->info->power_status));
+		new_slot->hpc_ops->get_attention_status(new_slot, &(new_slot->hotplug_slot->info->attention_status));
+		new_slot->hpc_ops->get_latch_status(new_slot, &(new_slot->hotplug_slot->info->latch_status));
+		new_slot->hpc_ops->get_adapter_status(new_slot, &(new_slot->hotplug_slot->info->adapter_status));
+
+		dbg("Registering bus=%x dev=%x hp_slot=%x sun=%x slot_device_offset=%x\n", new_slot->bus, new_slot->device, new_slot->hp_slot, new_slot->number, ctrl->slot_device_offset);
+		result = pci_hp_register (new_slot->hotplug_slot);
+		if (result) {
+			err ("pci_hp_register failed with error %d\n", result);
+			kfree (new_slot->hotplug_slot->info);
+			kfree (new_slot->hotplug_slot->name);
+			kfree (new_slot->hotplug_slot);
+			kfree (new_slot);
+			return result;
+		}
+
+		new_slot->next = ctrl->slot;
+		ctrl->slot = new_slot;
+
+		number_of_slots--;
+		slot_device++;
+		slot_number += ctrl->slot_num_inc;
+	}
+
+	return(0);
+}
+
+
+static int cleanup_slots (struct controller * ctrl)
+{
+	struct slot *old_slot, *next_slot;
+
+	old_slot = ctrl->slot;
+	ctrl->slot = NULL;
+
+	while (old_slot) {
+		next_slot = old_slot->next;
+		pci_hp_deregister (old_slot->hotplug_slot);
+		kfree(old_slot->hotplug_slot->info);
+		kfree(old_slot->hotplug_slot->name);
+		kfree(old_slot->hotplug_slot);
+		kfree(old_slot);
+		old_slot = next_slot;
+	}
+
+
+	return(0);
+}
+
+static int get_ctlr_slot_config(struct controller *ctrl)
+{
+	int num_ctlr_slots;
+	int first_device_num;
+	int physical_slot_num;
+	int updown;
+	int rc;
+	int flags;
+
+	rc = shpc_get_ctlr_slot_config(ctrl, &num_ctlr_slots, &first_device_num, &physical_slot_num, 
+		&updown, &flags);
+	if (rc) {
+		err("%s: get_ctlr_slot_config fail for b:d (%x:%x)\n", __FUNCTION__, ctrl->bus, ctrl->device);
+		return (-1);
+	}
+
+	ctrl->num_slots = num_ctlr_slots;
+	ctrl->slot_device_offset = first_device_num;
+	ctrl->first_slot = physical_slot_num;
+	ctrl->slot_num_inc = updown;		/* either -1 or 1 */
+
+	dbg("%s: num_slot(0x%x) 1st_dev(0x%x) psn(0x%x) updown(%d) for b:d (%x:%x)\n",
+		__FUNCTION__, num_ctlr_slots, first_device_num, physical_slot_num, updown, 
+		ctrl->bus, ctrl->device);
+
+	return (0);
+}
+
+
+/*
+ * set_attention_status - Turns the Amber LED for a slot on, off or blink
+ */
+static int set_attention_status (struct hotplug_slot *hotplug_slot, u8 status)
+{
+	struct slot *slot = get_slot (hotplug_slot, __FUNCTION__);
+
+	if (slot == NULL)
+		return -ENODEV;
+	
+	dbg("%s - physical_slot = %s\n", __FUNCTION__, hotplug_slot->name);
+
+	hotplug_slot->info->attention_status = status;
+	slot->hpc_ops->set_attention_status(slot, status);
+
+
+	return 0;
+}
+
+
+static int enable_slot (struct hotplug_slot *hotplug_slot)
+{
+	struct slot *slot = get_slot (hotplug_slot, __FUNCTION__);
+	
+	if (slot == NULL)
+		return -ENODEV;
+
+	dbg("%s - physical_slot = %s\n", __FUNCTION__, hotplug_slot->name);
+
+	return shpchp_enable_slot(slot);
+}
+
+
+static int disable_slot (struct hotplug_slot *hotplug_slot)
+{
+	struct slot *slot = get_slot (hotplug_slot, __FUNCTION__);
+	
+	if (slot == NULL)
+		return -ENODEV;
+
+	dbg("%s - physical_slot = %s\n", __FUNCTION__, hotplug_slot->name);
+
+	return shpchp_disable_slot(slot);
+}
+
+
+static int hardware_test (struct hotplug_slot *hotplug_slot, u32 value)
+{
+	return 0;
+}
+
+
+static int get_power_status (struct hotplug_slot *hotplug_slot, u8 *value)
+{
+	struct slot *slot = get_slot (hotplug_slot, __FUNCTION__);
+	int retval;
+	
+	if (slot == NULL)
+		return -ENODEV;
+	
+	dbg("%s - physical_slot = %s\n", __FUNCTION__, hotplug_slot->name);
+
+	retval = slot->hpc_ops->get_power_status(slot, value);
+	if (retval < 0)
+		*value = hotplug_slot->info->power_status;
+
+	return 0;
+}
+
+static int get_attention_status (struct hotplug_slot *hotplug_slot, u8 *value)
+{
+	struct slot *slot = get_slot (hotplug_slot, __FUNCTION__);
+	int retval;
+	
+	if (slot == NULL)
+		return -ENODEV;
+	
+	dbg("%s - physical_slot = %s\n", __FUNCTION__, hotplug_slot->name);
+
+	retval = slot->hpc_ops->get_attention_status(slot, value);
+	if (retval < 0)
+		*value = hotplug_slot->info->attention_status;
+
+	return 0;
+}
+
+static int get_latch_status (struct hotplug_slot *hotplug_slot, u8 *value)
+{
+	struct slot *slot = get_slot (hotplug_slot, __FUNCTION__);
+	int retval;
+	
+	if (slot == NULL)
+		return -ENODEV;
+	
+	dbg("%s - physical_slot = %s\n", __FUNCTION__, hotplug_slot->name);
+
+	retval = slot->hpc_ops->get_latch_status(slot, value);
+	if (retval < 0)
+		*value = hotplug_slot->info->latch_status;
+
+	return 0;
+}
+
+static int get_adapter_status (struct hotplug_slot *hotplug_slot, u8 *value)
+{
+	struct slot *slot = get_slot (hotplug_slot, __FUNCTION__);
+	int retval;
+	
+	if (slot == NULL)
+		return -ENODEV;
+
+	dbg("%s - physical_slot = %s\n", __FUNCTION__, hotplug_slot->name);
+
+	retval = slot->hpc_ops->get_adapter_status(slot, value);
+
+	if (retval < 0)
+		*value = hotplug_slot->info->adapter_status;
+
+	return 0;
+}
+
+static int get_max_bus_speed (struct hotplug_slot *hotplug_slot, enum pci_bus_speed *value)
+{
+	struct slot *slot = get_slot (hotplug_slot, __FUNCTION__);
+	int retval;
+	
+	if (slot == NULL)
+		return -ENODEV;
+
+	dbg("%s - physical_slot = %s\n", __FUNCTION__, hotplug_slot->name);
+	
+	retval = slot->hpc_ops->get_max_bus_speed(slot, value);
+	if (retval < 0)
+		*value = PCI_SPEED_UNKNOWN;
+
+	return 0;
+}
+
+static int get_cur_bus_speed (struct hotplug_slot *hotplug_slot, enum pci_bus_speed *value)
+{
+	struct slot *slot = get_slot (hotplug_slot, __FUNCTION__);
+	int retval;
+	
+	if (slot == NULL)
+		return -ENODEV;
+
+	dbg("%s - physical_slot = %s\n", __FUNCTION__, hotplug_slot->name);
+	
+	retval = slot->hpc_ops->get_cur_bus_speed(slot, value);
+	if (retval < 0)
+		*value = PCI_SPEED_UNKNOWN;
+
+	return 0;
+}
+
+static int shpc_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
+{
+	int rc;
+	struct controller *ctrl;
+	struct slot *t_slot;
+	int first_device_num;	/* first PCI device number supported by this SHPC */
+	int num_ctlr_slots;		/* number of slots supported by this SHPC */
+
+	ctrl = (struct controller *) kmalloc(sizeof(struct controller), GFP_KERNEL);
+	if (!ctrl) {
+		err("%s : out of memory\n", __FUNCTION__);
+		goto err_out_none;
+	}
+	memset(ctrl, 0, sizeof(struct controller));
+
+	dbg("DRV_thread pid = %d\n", current->pid);
+
+	rc = shpc_init(ctrl, pdev,
+		(php_intr_callback_t) shpchp_handle_attention_button,
+		(php_intr_callback_t) shpchp_handle_switch_change,
+		(php_intr_callback_t) shpchp_handle_presence_change,
+		(php_intr_callback_t) shpchp_handle_power_fault);
+	if (rc) {
+		dbg("%s: controller initialization failed\n", SHPC_MODULE_NAME);
+		goto err_out_free_ctrl;
+	}
+
+	dbg("%s: controller initialization success\n", __FUNCTION__);
+	ctrl->pci_dev = pdev; /* pci_dev of the P2P bridge */
+
+	ctrl->pci_bus = kmalloc (sizeof (*ctrl->pci_bus), GFP_KERNEL);
+	if (!ctrl->pci_bus) {
+		err("out of memory\n");
+		rc = -ENOMEM;
+		goto err_out_unmap_mmio_region;
+	}
+	memcpy (ctrl->pci_bus, pdev->bus, sizeof (*ctrl->pci_bus));
+	ctrl->bus = pdev->bus->number;
+	ctrl->slot_bus = pdev->subordinate->number;
+
+	ctrl->device = PCI_SLOT(pdev->devfn);
+	ctrl->function = PCI_FUNC(pdev->devfn);
+	dbg("ctrl bus=0x%x, device=%x, function=%x, irq=%x\n", ctrl->bus, ctrl->device, 
+		ctrl->function, pdev->irq);
+
+	/*
+	 *	Save configuration headers for this and subordinate PCI buses
+	 */
+
+	rc = get_ctlr_slot_config(ctrl);
+	if (rc) {
+		err(msg_initialization_err, rc);
+		goto err_out_free_ctrl_bus;
+	}
+	first_device_num = ctrl->slot_device_offset;
+	num_ctlr_slots = ctrl->num_slots;
+
+	/* Store PCI Config Space for all devices on this bus */
+	rc = shpchp_save_config(ctrl, ctrl->slot_bus, num_ctlr_slots, first_device_num);
+	if (rc) {
+		err("%s: unable to save PCI configuration data, error %d\n", __FUNCTION__, rc);
+		goto err_out_free_ctrl_bus;
+	}
+
+	/* Get IO, memory, and IRQ resources for new devices */
+	rc = shpchprm_find_available_resources(ctrl);
+	ctrl->add_support = !rc;
+	
+	if (rc) {
+		dbg("shpchprm_find_available_resources = %#x\n", rc);
+		err("unable to locate PCI configuration resources for hot plug add.\n");
+		goto err_out_free_ctrl_bus;
+	}
+
+	/* Setup the slot information structures */
+	rc = init_slots(ctrl);
+	if (rc) {
+		err(msg_initialization_err, 6);
+		goto err_out_free_ctrl_slot;
+	}
+
+	/* Now hpc_functions (slot->hpc_ops->functions) are ready  */
+	t_slot = shpchp_find_slot(ctrl, first_device_num);
+
+	/* Check for operation bus speed */
+	rc = t_slot->hpc_ops->get_cur_bus_speed(t_slot, &ctrl->speed);
+	dbg("%s: t_slot->hp_slot %x\n", __FUNCTION__,t_slot->hp_slot);
+
+	if (rc || ctrl->speed == PCI_SPEED_UNKNOWN) {
+		err(SHPC_MODULE_NAME ": Can't get current bus speed. Set to 33MHz PCI.\n");
+		ctrl->speed = PCI_SPEED_33MHz;
+	}
+
+	/* Finish setting up the hot plug ctrl device */
+	ctrl->next_event = 0;
+
+	if (!shpchp_ctrl_list) {
+		shpchp_ctrl_list = ctrl;
+		ctrl->next = NULL;
+	} else {
+		ctrl->next = shpchp_ctrl_list;
+		shpchp_ctrl_list = ctrl;
+	}
+
+	return 0;
+
+err_out_free_ctrl_slot:
+	cleanup_slots(ctrl);
+err_out_free_ctrl_bus:
+	kfree(ctrl->pci_bus);
+err_out_unmap_mmio_region:
+	ctrl->hpc_ops->release_ctlr(ctrl);
+err_out_free_ctrl:
+	kfree(ctrl);
+err_out_none:
+	return -ENODEV;
+}
+
+
+static int shpc_start_thread(void)
+{
+	int loop;
+	int retval = 0;
+	
+	dbg("Initialize + Start the notification/polling mechanism \n");
+
+	retval = shpchp_event_start_thread();
+	if (retval) {
+		dbg("shpchp_event_start_thread() failed\n");
+		return retval;
+	}
+
+	dbg("Initialize slot lists\n");
+	/* One slot list for each bus in the system */
+	for (loop = 0; loop < 256; loop++) {
+		shpchp_slot_list[loop] = NULL;
+	}
+
+	return retval;
+}
+
+
+static void unload_shpchpd(void)
+{
+	struct pci_func *next;
+	struct pci_func *TempSlot;
+	int loop;
+	struct controller *ctrl;
+	struct controller *tctrl;
+	struct pci_resource *res;
+	struct pci_resource *tres;
+
+	ctrl = shpchp_ctrl_list;
+
+	while (ctrl) {
+		cleanup_slots(ctrl);
+
+		res = ctrl->io_head;
+		while (res) {
+			tres = res;
+			res = res->next;
+			kfree(tres);
+		}
+
+		res = ctrl->mem_head;
+		while (res) {
+			tres = res;
+			res = res->next;
+			kfree(tres);
+		}
+
+		res = ctrl->p_mem_head;
+		while (res) {
+			tres = res;
+			res = res->next;
+			kfree(tres);
+		}
+
+		res = ctrl->bus_head;
+		while (res) {
+			tres = res;
+			res = res->next;
+			kfree(tres);
+		}
+
+		kfree (ctrl->pci_bus);
+
+		dbg("%s: calling release_ctlr\n", __FUNCTION__);
+		ctrl->hpc_ops->release_ctlr(ctrl);
+
+		tctrl = ctrl;
+		ctrl = ctrl->next;
+
+		kfree(tctrl);
+	}
+
+	for (loop = 0; loop < 256; loop++) {
+		next = shpchp_slot_list[loop];
+		while (next != NULL) {
+			res = next->io_head;
+			while (res) {
+				tres = res;
+				res = res->next;
+				kfree(tres);
+			}
+
+			res = next->mem_head;
+			while (res) {
+				tres = res;
+				res = res->next;
+				kfree(tres);
+			}
+
+			res = next->p_mem_head;
+			while (res) {
+				tres = res;
+				res = res->next;
+				kfree(tres);
+			}
+
+			res = next->bus_head;
+			while (res) {
+				tres = res;
+				res = res->next;
+				kfree(tres);
+			}
+
+			TempSlot = next;
+			next = next->next;
+			kfree(TempSlot);
+		}
+	}
+
+	/* Stop the notification mechanism */
+	shpchp_event_stop_thread();
+
+}
+
+
+static struct pci_device_id shpcd_pci_tbl[] __devinitdata = {
+	{
+	.class =        ((PCI_CLASS_BRIDGE_PCI << 8) | 0x00),
+	.class_mask =	~0,	
+	.vendor =       PCI_ANY_ID,
+	.device =       PCI_ANY_ID,
+	.subvendor =    PCI_ANY_ID,
+	.subdevice =    PCI_ANY_ID,
+	},
+	{ /* end: all zeroes */ }
+};
+
+MODULE_DEVICE_TABLE(pci, shpcd_pci_tbl);
+
+
+
+static struct pci_driver shpc_driver = {
+	.name =		SHPC_MODULE_NAME,
+	.id_table =	shpcd_pci_tbl,
+	.probe =	shpc_probe,
+	/* remove:	shpc_remove_one, */
+};
+
+
+
+static int __init shpcd_init(void)
+{
+	int retval = 0;
+
+#ifdef CONFIG_HOTPLUG_PCI_SHPC_POLL_EVENT_MODE
+	shpchp_poll_mode = 1;
+#endif
+
+	retval = shpc_start_thread();
+	if (retval)
+		goto error_hpc_init;
+
+	retval = shpchprm_init(PCI);
+	if (!retval) {
+		retval = pci_module_init(&shpc_driver);
+		dbg("%s: pci_module_init = %d\n", __FUNCTION__,retval);
+		info(DRIVER_DESC " version: " DRIVER_VERSION "\n");
+	}
+
+error_hpc_init:
+	if (retval) {
+		shpchprm_cleanup();
+		shpchp_event_stop_thread();
+	} else
+			shpchprm_print_pirt();
+
+	return retval;
+}
+
+static void __exit shpcd_cleanup(void)
+{
+	dbg("unload_shpchpd()\n");
+	unload_shpchpd();
+
+	shpchprm_cleanup();
+
+	dbg("pci_unregister_driver\n");
+	pci_unregister_driver(&shpc_driver);
+
+	info(DRIVER_DESC " version: " DRIVER_VERSION " unloaded\n");
+}
+
+
+module_init(shpcd_init);
+module_exit(shpcd_cleanup);
+
+