/* * PCI Express 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>, <kristen.c.accardi@intel.com> * */#include <linux/config.h>#include <linux/module.h>#include <linux/moduleparam.h>#include <linux/kernel.h>#include <linux/types.h>#include <linux/proc_fs.h>#include <linux/slab.h>#include <linux/workqueue.h>#include <linux/pci.h>#include <linux/init.h>#include <asm/uaccess.h>#include "pciehp.h"#include "pciehprm.h"#include <linux/interrupt.h>/* Global variables */int pciehp_debug;int pciehp_poll_mode;int pciehp_poll_time;struct controller *pciehp_ctrl_list;struct pci_func *pciehp_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	"PCI Express Hot Plug Controller Driver"MODULE_AUTHOR(DRIVER_AUTHOR);MODULE_DESCRIPTION(DRIVER_DESC);MODULE_LICENSE("GPL");module_param(pciehp_debug, bool, 0644);module_param(pciehp_poll_mode, bool, 0644);module_param(pciehp_poll_time, int, 0644);MODULE_PARM_DESC(pciehp_debug, "Debugging mode enabled or not");MODULE_PARM_DESC(pciehp_poll_mode, "Using polling mechanism for hot-plug events or not");MODULE_PARM_DESC(pciehp_poll_time, "Polling mechanism frequency, in seconds");#define PCIE_MODULE_NAME "pciehp"static int pcie_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 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 pciehp_hotplug_slot_ops = {	.owner =		THIS_MODULE,	.set_attention_status =	set_attention_status,	.enable_slot =		enable_slot,	.disable_slot =		disable_slot,	.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,};/** * release_slot - free up the memory used by a slot * @hotplug_slot: slot to free */static void release_slot(struct hotplug_slot *hotplug_slot){	struct slot *slot = hotplug_slot->private;	dbg("%s - physical_slot = %s\n", __FUNCTION__, hotplug_slot->name);	kfree(slot->hotplug_slot->info);	kfree(slot->hotplug_slot->name);	kfree(slot->hotplug_slot);	kfree(slot);}static int init_slots(struct controller *ctrl){	struct slot *new_slot;	u8 number_of_slots;	u8 slot_device;	u32 slot_number;	int result = -ENOMEM;	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 = kmalloc(sizeof(*new_slot), GFP_KERNEL);		if (!new_slot)			goto error;		memset(new_slot, 0, sizeof(struct slot));		new_slot->hotplug_slot =				kmalloc(sizeof(*(new_slot->hotplug_slot)),						GFP_KERNEL);		if (!new_slot->hotplug_slot)			goto error_slot;		memset(new_slot->hotplug_slot, 0, sizeof(struct hotplug_slot));		new_slot->hotplug_slot->info =			kmalloc(sizeof(*(new_slot->hotplug_slot->info)),						GFP_KERNEL);		if (!new_slot->hotplug_slot->info)			goto error_hpslot;		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)			goto error_info;		new_slot->ctrl = ctrl;		new_slot->bus = ctrl->slot_bus;		new_slot->device = slot_device;		new_slot->hpc_ops = ctrl->hpc_ops;		new_slot->number = ctrl->first_slot;		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;		new_slot->hotplug_slot->release = &release_slot;		make_slot_name(new_slot->hotplug_slot->name, SLOT_NAME_SIZE, new_slot);		new_slot->hotplug_slot->ops = &pciehp_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);			goto error_name;		}		new_slot->next = ctrl->slot;		ctrl->slot = new_slot;		number_of_slots--;		slot_device++;		slot_number += ctrl->slot_num_inc;	}	return 0;error_name:	kfree(new_slot->hotplug_slot->name);error_info:	kfree(new_slot->hotplug_slot->info);error_hpslot:	kfree(new_slot->hotplug_slot);error_slot:	kfree(new_slot);error:	return result;}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);		old_slot = next_slot;	}	return(0);}static int get_ctlr_slot_config(struct controller *ctrl){	int num_ctlr_slots;		/* Not needed; PCI Express has 1 slot per port*/	int first_device_num;		/* Not needed */	int physical_slot_num;	u8 ctrlcap;				int rc;	rc = pcie_get_ctlr_slot_config(ctrl, &num_ctlr_slots, &first_device_num, &physical_slot_num, &ctrlcap);	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;	/* PCI Express has 1 slot per port */	ctrl->slot_device_offset = first_device_num;	ctrl->first_slot = physical_slot_num;	ctrl->ctrlcap = ctrlcap; 		dbg("%s: bus(0x%x) num_slot(0x%x) 1st_dev(0x%x) psn(0x%x) ctrlcap(%x) for b:d (%x:%x)\n",		__FUNCTION__, ctrl->slot_bus, num_ctlr_slots, first_device_num, physical_slot_num, ctrlcap, 		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 = hotplug_slot->private;	dbg("%s - physical_slot = %s\n", __FUNCTION__, hotplug_slot->name);	hotplug_slot->info->attention_status = status;		if (ATTN_LED(slot->ctrl->ctrlcap)) 		slot->hpc_ops->set_attention_status(slot, status);	return 0;}static int enable_slot(struct hotplug_slot *hotplug_slot){	struct slot *slot = hotplug_slot->private;	dbg("%s - physical_slot = %s\n", __FUNCTION__, hotplug_slot->name);	return pciehp_enable_slot(slot);}static int disable_slot(struct hotplug_slot *hotplug_slot){	struct slot *slot = hotplug_slot->private;	dbg("%s - physical_slot = %s\n", __FUNCTION__, hotplug_slot->name);	return pciehp_disable_slot(slot);}static int get_power_status(struct hotplug_slot *hotplug_slot, u8 *value){	struct slot *slot = hotplug_slot->private;	int retval;	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 = hotplug_slot->private;	int retval;	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 = hotplug_slot->private;	int retval;	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 = hotplug_slot->private;	int retval;	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 = hotplug_slot->private;	int retval;