[linux-block.git] / drivers / pci / hotplug / pciehp_core.c

/*
 * 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/module.h>
#include <linux/moduleparam.h>
#include <linux/kernel.h>
#include <linux/types.h>
#include <linux/pci.h>
#include "pciehp.h"
#include <linux/interrupt.h>
#include <linux/time.h>

/* Global variables */
int pciehp_debug;
int pciehp_poll_mode;
int pciehp_poll_time;
int pciehp_force;
struct workqueue_struct *pciehp_wq;

#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_param(pciehp_force, bool, 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");
MODULE_PARM_DESC(pciehp_force, "Force pciehp, even if _OSC and OSHP are missing");

#define PCIE_MODULE_NAME "pciehp"

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 = {
	.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;

	ctrl_dbg(slot->ctrl, "%s: physical_slot = %s\n",
		 __func__, hotplug_slot_name(hotplug_slot));

	kfree(hotplug_slot->info);
	kfree(hotplug_slot);
}

static int init_slot(struct controller *ctrl)
{
	struct slot *slot = ctrl->slot;
	struct hotplug_slot *hotplug = NULL;
	struct hotplug_slot_info *info = NULL;
	char name[SLOT_NAME_SIZE];
	int retval = -ENOMEM;

	hotplug = kzalloc(sizeof(*hotplug), GFP_KERNEL);
	if (!hotplug)
		goto out;

	info = kzalloc(sizeof(*info), GFP_KERNEL);
	if (!info)
		goto out;

	/* register this slot with the hotplug pci core */
	hotplug->info = info;
	hotplug->private = slot;
	hotplug->release = &release_slot;
	hotplug->ops = &pciehp_hotplug_slot_ops;
	slot->hotplug_slot = hotplug;
	snprintf(name, SLOT_NAME_SIZE, "%u", PSN(ctrl));

	ctrl_dbg(ctrl, "Registering domain:bus:dev=%04x:%02x:00 sun=%x\n",
		 pci_domain_nr(ctrl->pcie->port->subordinate),
		 ctrl->pcie->port->subordinate->number, PSN(ctrl));
	retval = pci_hp_register(hotplug,
				 ctrl->pcie->port->subordinate, 0, name);
	if (retval) {
		ctrl_err(ctrl,
			 "pci_hp_register failed with error %d\n", retval);
		goto out;
	}
	get_power_status(hotplug, &info->power_status);
	get_attention_status(hotplug, &info->attention_status);
	get_latch_status(hotplug, &info->latch_status);
	get_adapter_status(hotplug, &info->adapter_status);
out:
	if (retval) {
		kfree(info);
		kfree(hotplug);
	}
	return retval;
}

static void cleanup_slot(struct controller *ctrl)
{
	pci_hp_deregister(ctrl->slot->hotplug_slot);
}

/*
 * 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;

	ctrl_dbg(slot->ctrl, "%s: physical_slot = %s\n",
		  __func__, slot_name(slot));

	hotplug_slot->info->attention_status = status;

	if (ATTN_LED(slot->ctrl))
		pciehp_set_attention_status(slot, status);

	return 0;
}


static int enable_slot(struct hotplug_slot *hotplug_slot)
{
	struct slot *slot = hotplug_slot->private;

	ctrl_dbg(slot->ctrl, "%s: physical_slot = %s\n",
		 __func__, slot_name(slot));

	return pciehp_sysfs_enable_slot(slot);
}


static int disable_slot(struct hotplug_slot *hotplug_slot)
{
	struct slot *slot = hotplug_slot->private;

	ctrl_dbg(slot->ctrl, "%s: physical_slot = %s\n",
		  __func__, slot_name(slot));

	return pciehp_sysfs_disable_slot(slot);
}

static int get_power_status(struct hotplug_slot *hotplug_slot, u8 *value)
{
	struct slot *slot = hotplug_slot->private;
	int retval;

	ctrl_dbg(slot->ctrl, "%s: physical_slot = %s\n",
		  __func__, slot_name(slot));

	retval = pciehp_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;

	ctrl_dbg(slot->ctrl, "%s: physical_slot = %s\n",
		  __func__, slot_name(slot));

	retval = pciehp_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;

	ctrl_dbg(slot->ctrl, "%s: physical_slot = %s\n",
		 __func__, slot_name(slot));

	retval = pciehp_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;

	ctrl_dbg(slot->ctrl, "%s: physical_slot = %s\n",
		 __func__, slot_name(slot));

	retval = pciehp_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;

	ctrl_dbg(slot->ctrl, "%s: physical_slot = %s\n",
		 __func__, slot_name(slot));

	retval = pciehp_get_max_link_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 = hotplug_slot->private;
	int retval;

	ctrl_dbg(slot->ctrl, "%s: physical_slot = %s\n",
		 __func__, slot_name(slot));

	retval = pciehp_get_cur_link_speed(slot, value);
	if (retval < 0)
		*value = PCI_SPEED_UNKNOWN;

	return 0;
}

static int pciehp_probe(struct pcie_device *dev)
{
	int rc;
	struct controller *ctrl;
	struct slot *slot;
	u8 value;
	struct pci_dev *pdev = dev->port;

	if (pciehp_force)
		dev_info(&dev->device,
			 "Bypassing BIOS check for pciehp use on %s\n",
			 pci_name(pdev));
	else if (pciehp_get_hp_hw_control_from_firmware(pdev))
		goto err_out_none;

	ctrl = pcie_init(dev);
	if (!ctrl) {
		dev_err(&dev->device, "Controller initialization failed\n");
		goto err_out_none;
	}
	set_service_data(dev, ctrl);

	/* Setup the slot information structures */
	rc = init_slot(ctrl);
	if (rc) {
		if (rc == -EBUSY)
			ctrl_warn(ctrl, "Slot already registered by another "
				  "hotplug driver\n");
		else
			ctrl_err(ctrl, "Slot initialization failed\n");
		goto err_out_release_ctlr;
	}

	/* Enable events after we have setup the data structures */
	rc = pcie_init_notification(ctrl);
	if (rc) {
		ctrl_err(ctrl, "Notification initialization failed\n");
		goto err_out_release_ctlr;
	}

	/* Check if slot is occupied */
	slot = ctrl->slot;
	pciehp_get_adapter_status(slot, &value);
	if (value) {
		if (pciehp_force)
			pciehp_enable_slot(slot);
	} else {
		/* Power off slot if not occupied */
		if (POWER_CTRL(ctrl)) {
			rc = pciehp_power_off_slot(slot);
			if (rc)
				goto err_out_free_ctrl_slot;
		}
	}

	return 0;

err_out_free_ctrl_slot:
	cleanup_slot(ctrl);
err_out_release_ctlr:
	pciehp_release_ctrl(ctrl);
err_out_none:
	return -ENODEV;
}

static void pciehp_remove(struct pcie_device *dev)
{
	struct controller *ctrl = get_service_data(dev);

	cleanup_slot(ctrl);
	pciehp_release_ctrl(ctrl);
}

#ifdef CONFIG_PM
static int pciehp_suspend (struct pcie_device *dev)
{
	dev_info(&dev->device, "%s ENTRY\n", __func__);
	return 0;
}

static int pciehp_resume (struct pcie_device *dev)
{
	dev_info(&dev->device, "%s ENTRY\n", __func__);
	if (pciehp_force) {
		struct controller *ctrl = get_service_data(dev);
		struct slot *slot;
		u8 status;

		/* reinitialize the chipset's event detection logic */
		pcie_enable_notification(ctrl);

		slot = ctrl->slot;

		/* Check if slot is occupied */
		pciehp_get_adapter_status(slot, &status);
		if (status)
			pciehp_enable_slot(slot);
		else
			pciehp_disable_slot(slot);
	}
	return 0;
}
#endif /* PM */

static struct pcie_port_service_driver hpdriver_portdrv = {
	.name		= PCIE_MODULE_NAME,
	.port_type	= PCIE_ANY_PORT,
	.service	= PCIE_PORT_SERVICE_HP,

	.probe		= pciehp_probe,
	.remove		= pciehp_remove,

#ifdef	CONFIG_PM
	.suspend	= pciehp_suspend,
	.resume		= pciehp_resume,
#endif	/* PM */
};

static int __init pcied_init(void)
{
	int retval = 0;

	pciehp_firmware_init();
	retval = pcie_port_service_register(&hpdriver_portdrv);
 	dbg("pcie_port_service_register = %d\n", retval);
  	info(DRIVER_DESC " version: " DRIVER_VERSION "\n");
 	if (retval)
		dbg("Failure to register service\n");
	return retval;
}

static void __exit pcied_cleanup(void)
{
	dbg("unload_pciehpd()\n");
	pcie_port_service_unregister(&hpdriver_portdrv);
	info(DRIVER_DESC " version: " DRIVER_VERSION " unloaded\n");
}

module_init(pcied_init);
module_exit(pcied_cleanup);
Commit	Line	Data
1da177e4 LT	1	/*
	2	* PCI Express Hot Plug Controller Driver
	3	*
	4	* Copyright (C) 1995,2001 Compaq Computer Corporation
	5	* Copyright (C) 2001 Greg Kroah-Hartman (greg@kroah.com)
	6	* Copyright (C) 2001 IBM Corp.
	7	* Copyright (C) 2003-2004 Intel Corporation
	8	*
	9	* All rights reserved.
	10	*
	11	* This program is free software; you can redistribute it and/or modify
	12	* it under the terms of the GNU General Public License as published by
	13	* the Free Software Foundation; either version 2 of the License, or (at
	14	* your option) any later version.
	15	*
	16	* This program is distributed in the hope that it will be useful, but
	17	* WITHOUT ANY WARRANTY; without even the implied warranty of
	18	* MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, GOOD TITLE or
	19	* NON INFRINGEMENT. See the GNU General Public License for more
	20	* details.
	21	*
	22	* You should have received a copy of the GNU General Public License
	23	* along with this program; if not, write to the Free Software
	24	* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
	25	*
8cf4c195	26	* Send feedback to <greg@kroah.com>, <kristen.c.accardi@intel.com>
1da177e4 LT	27	*
	28	*/
	29
1da177e4 LT	30	#include <linux/module.h>
	31	#include <linux/moduleparam.h>
	32	#include <linux/kernel.h>
	33	#include <linux/types.h>
1da177e4	34	#include <linux/pci.h>
1da177e4	35	#include "pciehp.h"
1da177e4	36	#include <linux/interrupt.h>
34d03419	37	#include <linux/time.h>
1da177e4 LT	38
	39	/* Global variables */
	40	int pciehp_debug;
	41	int pciehp_poll_mode;
	42	int pciehp_poll_time;
a3a45ec8	43	int pciehp_force;
5d386e1a	44	struct workqueue_struct *pciehp_wq;
1da177e4 LT	45
	46	#define DRIVER_VERSION "0.4"
	47	#define DRIVER_AUTHOR "Dan Zink <dan.zink@compaq.com>, Greg Kroah-Hartman <greg@kroah.com>, Dely Sy <dely.l.sy@intel.com>"
	48	#define DRIVER_DESC "PCI Express Hot Plug Controller Driver"
	49
	50	MODULE_AUTHOR(DRIVER_AUTHOR);
	51	MODULE_DESCRIPTION(DRIVER_DESC);
	52	MODULE_LICENSE("GPL");
	53
	54	module_param(pciehp_debug, bool, 0644);
	55	module_param(pciehp_poll_mode, bool, 0644);
	56	module_param(pciehp_poll_time, int, 0644);
a3a45ec8	57	module_param(pciehp_force, bool, 0644);
1da177e4 LT	58	MODULE_PARM_DESC(pciehp_debug, "Debugging mode enabled or not");
	59	MODULE_PARM_DESC(pciehp_poll_mode, "Using polling mechanism for hot-plug events or not");
	60	MODULE_PARM_DESC(pciehp_poll_time, "Polling mechanism frequency, in seconds");
a3a45ec8	61	MODULE_PARM_DESC(pciehp_force, "Force pciehp, even if _OSC and OSHP are missing");
1da177e4 LT	62
	63	#define PCIE_MODULE_NAME "pciehp"
	64
1da177e4 LT	65	static int set_attention_status (struct hotplug_slot *slot, u8 value);
	66	static int enable_slot (struct hotplug_slot *slot);
	67	static int disable_slot (struct hotplug_slot *slot);
	68	static int get_power_status (struct hotplug_slot slot, u8 value);
	69	static int get_attention_status (struct hotplug_slot slot, u8 value);
	70	static int get_latch_status (struct hotplug_slot slot, u8 value);
	71	static int get_adapter_status (struct hotplug_slot slot, u8 value);
	72	static int get_max_bus_speed (struct hotplug_slot slot, enum pci_bus_speed value);
	73	static int get_cur_bus_speed (struct hotplug_slot slot, enum pci_bus_speed value);
	74
	75	static struct hotplug_slot_ops pciehp_hotplug_slot_ops = {
1da177e4 LT	76	.set_attention_status = set_attention_status,
	77	.enable_slot = enable_slot,
	78	.disable_slot = disable_slot,
	79	.get_power_status = get_power_status,
	80	.get_attention_status = get_attention_status,
	81	.get_latch_status = get_latch_status,
	82	.get_adapter_status = get_adapter_status,
	83	.get_max_bus_speed = get_max_bus_speed,
	84	.get_cur_bus_speed = get_cur_bus_speed,
	85	};
	86
b308240b DS	87	/**
	88	* release_slot - free up the memory used by a slot
	89	* @hotplug_slot: slot to free
	90	*/
	91	static void release_slot(struct hotplug_slot *hotplug_slot)
	92	{
7f2feec1 TI	93	struct slot *slot = hotplug_slot->private;
7f2feec1 TI	94
18b341b7	95	ctrl_dbg(slot->ctrl, "%s: physical_slot = %s\n",
e1acb24f	96	__func__, hotplug_slot_name(hotplug_slot));
b308240b	97
c4635eb0 KK	98	kfree(hotplug_slot->info);
c4635eb0 KK	99	kfree(hotplug_slot);
a0b17257 KK	100	}
a0b17257 KK	101
8720d27d	102	static int init_slot(struct controller *ctrl)
1da177e4	103	{
8720d27d KK	104	struct slot *slot = ctrl->slot;
	105	struct hotplug_slot *hotplug = NULL;
	106	struct hotplug_slot_info *info = NULL;
e1acb24f	107	char name[SLOT_NAME_SIZE];
a0b17257	108	int retval = -ENOMEM;
1da177e4	109
8720d27d KK	110	hotplug = kzalloc(sizeof(*hotplug), GFP_KERNEL);
	111	if (!hotplug)
	112	goto out;
	113
	114	info = kzalloc(sizeof(*info), GFP_KERNEL);
	115	if (!info)
	116	goto out;
	117
	118	/* register this slot with the hotplug pci core */
	119	hotplug->info = info;
	120	hotplug->private = slot;
	121	hotplug->release = &release_slot;
	122	hotplug->ops = &pciehp_hotplug_slot_ops;
	123	slot->hotplug_slot = hotplug;
07a09694	124	snprintf(name, SLOT_NAME_SIZE, "%u", PSN(ctrl));
8720d27d	125
a2359a33	126	ctrl_dbg(ctrl, "Registering domain:bus:dev=%04x:%02x:00 sun=%x\n",
385e2491	127	pci_domain_nr(ctrl->pcie->port->subordinate),
07a09694	128	ctrl->pcie->port->subordinate->number, PSN(ctrl));
8720d27d	129	retval = pci_hp_register(hotplug,
385e2491	130	ctrl->pcie->port->subordinate, 0, name);
8720d27d KK	131	if (retval) {
	132	ctrl_err(ctrl,
	133	"pci_hp_register failed with error %d\n", retval);
	134	goto out;
	135	}
	136	get_power_status(hotplug, &info->power_status);
	137	get_attention_status(hotplug, &info->attention_status);
	138	get_latch_status(hotplug, &info->latch_status);
	139	get_adapter_status(hotplug, &info->adapter_status);
	140	out:
	141	if (retval) {
	142	kfree(info);
	143	kfree(hotplug);
1da177e4	144	}
a0b17257	145	return retval;
1da177e4 LT	146	}
1da177e4 LT	147
8720d27d	148	static void cleanup_slot(struct controller *ctrl)
1da177e4	149	{
8720d27d	150	pci_hp_deregister(ctrl->slot->hotplug_slot);
1da177e4 LT	151	}
1da177e4 LT	152
1da177e4 LT	153	/*
	154	* set_attention_status - Turns the Amber LED for a slot on, off or blink
	155	*/
	156	static int set_attention_status(struct hotplug_slot *hotplug_slot, u8 status)
	157	{
	158	struct slot *slot = hotplug_slot->private;
	159
18b341b7	160	ctrl_dbg(slot->ctrl, "%s: physical_slot = %s\n",
e1acb24f	161	__func__, slot_name(slot));
1da177e4 LT	162
1da177e4 LT	163	hotplug_slot->info->attention_status = status;
a073a826	164
ae416e6b	165	if (ATTN_LED(slot->ctrl))
82a9e79e	166	pciehp_set_attention_status(slot, status);
1da177e4 LT	167
	168	return 0;
	169	}
	170
	171
	172	static int enable_slot(struct hotplug_slot *hotplug_slot)
	173	{
	174	struct slot *slot = hotplug_slot->private;
	175
18b341b7	176	ctrl_dbg(slot->ctrl, "%s: physical_slot = %s\n",
e1acb24f	177	__func__, slot_name(slot));
1da177e4	178
5d386e1a	179	return pciehp_sysfs_enable_slot(slot);
1da177e4 LT	180	}
	181
	182
	183	static int disable_slot(struct hotplug_slot *hotplug_slot)
	184	{
	185	struct slot *slot = hotplug_slot->private;
	186
18b341b7	187	ctrl_dbg(slot->ctrl, "%s: physical_slot = %s\n",
e1acb24f	188	__func__, slot_name(slot));
1da177e4	189
5d386e1a	190	return pciehp_sysfs_disable_slot(slot);
1da177e4 LT	191	}
	192
	193	static int get_power_status(struct hotplug_slot hotplug_slot, u8 value)
	194	{
	195	struct slot *slot = hotplug_slot->private;
	196	int retval;
	197
18b341b7	198	ctrl_dbg(slot->ctrl, "%s: physical_slot = %s\n",
e1acb24f	199	__func__, slot_name(slot));
1da177e4	200
82a9e79e	201	retval = pciehp_get_power_status(slot, value);
1da177e4 LT	202	if (retval < 0)
	203	*value = hotplug_slot->info->power_status;
	204
	205	return 0;
	206	}
	207
	208	static int get_attention_status(struct hotplug_slot hotplug_slot, u8 value)
	209	{
	210	struct slot *slot = hotplug_slot->private;
	211	int retval;
	212
18b341b7	213	ctrl_dbg(slot->ctrl, "%s: physical_slot = %s\n",
e1acb24f	214	__func__, slot_name(slot));
1da177e4	215
82a9e79e	216	retval = pciehp_get_attention_status(slot, value);
1da177e4 LT	217	if (retval < 0)
	218	*value = hotplug_slot->info->attention_status;
	219
	220	return 0;
	221	}
	222
	223	static int get_latch_status(struct hotplug_slot hotplug_slot, u8 value)
	224	{
	225	struct slot *slot = hotplug_slot->private;
	226	int retval;
	227
18b341b7	228	ctrl_dbg(slot->ctrl, "%s: physical_slot = %s\n",
e1acb24f	229	__func__, slot_name(slot));
1da177e4	230
82a9e79e	231	retval = pciehp_get_latch_status(slot, value);
1da177e4 LT	232	if (retval < 0)
	233	*value = hotplug_slot->info->latch_status;
	234
	235	return 0;
	236	}
	237
	238	static int get_adapter_status(struct hotplug_slot hotplug_slot, u8 value)
	239	{
	240	struct slot *slot = hotplug_slot->private;
	241	int retval;
	242
18b341b7	243	ctrl_dbg(slot->ctrl, "%s: physical_slot = %s\n",
e1acb24f	244	__func__, slot_name(slot));
1da177e4	245
82a9e79e	246	retval = pciehp_get_adapter_status(slot, value);
1da177e4 LT	247	if (retval < 0)
	248	*value = hotplug_slot->info->adapter_status;
	249
	250	return 0;
	251	}
	252
f46753c5 AC	253	static int get_max_bus_speed(struct hotplug_slot *hotplug_slot,
f46753c5 AC	254	enum pci_bus_speed *value)
1da177e4 LT	255	{
	256	struct slot *slot = hotplug_slot->private;
	257	int retval;
	258
18b341b7	259	ctrl_dbg(slot->ctrl, "%s: physical_slot = %s\n",
e1acb24f	260	__func__, slot_name(slot));
a073a826	261
82a9e79e	262	retval = pciehp_get_max_link_speed(slot, value);
1da177e4 LT	263	if (retval < 0)
	264	*value = PCI_SPEED_UNKNOWN;
	265
	266	return 0;
	267	}
	268
	269	static int get_cur_bus_speed(struct hotplug_slot hotplug_slot, enum pci_bus_speed value)
	270	{
	271	struct slot *slot = hotplug_slot->private;
	272	int retval;
	273
18b341b7	274	ctrl_dbg(slot->ctrl, "%s: physical_slot = %s\n",
e1acb24f	275	__func__, slot_name(slot));
a073a826	276
82a9e79e	277	retval = pciehp_get_cur_link_speed(slot, value);
1da177e4 LT	278	if (retval < 0)
	279	*value = PCI_SPEED_UNKNOWN;
	280
	281	return 0;
	282	}
	283
0516c8bc	284	static int pciehp_probe(struct pcie_device *dev)
1da177e4 LT	285	{
	286	int rc;
	287	struct controller *ctrl;
8720d27d	288	struct slot *slot;
1da177e4	289	u8 value;
125c39f7 KK	290	struct pci_dev *pdev = dev->port;
	291
	292	if (pciehp_force)
7f2feec1 TI	293	dev_info(&dev->device,
	294	"Bypassing BIOS check for pciehp use on %s\n",
	295	pci_name(pdev));
125c39f7 KK	296	else if (pciehp_get_hp_hw_control_from_firmware(pdev))
125c39f7 KK	297	goto err_out_none;
a073a826	298
c4635eb0	299	ctrl = pcie_init(dev);
1da177e4	300	if (!ctrl) {
18b341b7	301	dev_err(&dev->device, "Controller initialization failed\n");
c4635eb0	302	goto err_out_none;
1da177e4	303	}
b9708940	304	set_service_data(dev, ctrl);
1da177e4	305
1da177e4	306	/* Setup the slot information structures */
8720d27d	307	rc = init_slot(ctrl);
1da177e4	308	if (rc) {
f46753c5	309	if (rc == -EBUSY)
18b341b7	310	ctrl_warn(ctrl, "Slot already registered by another "
7f2feec1	311	"hotplug driver\n");
f46753c5	312	else
18b341b7	313	ctrl_err(ctrl, "Slot initialization failed\n");
a8c2b635	314	goto err_out_release_ctlr;
1da177e4 LT	315	}
1da177e4 LT	316
dbc7e1e5 EB	317	/* Enable events after we have setup the data structures */
	318	rc = pcie_init_notification(ctrl);
	319	if (rc) {
	320	ctrl_err(ctrl, "Notification initialization failed\n");
	321	goto err_out_release_ctlr;
	322	}
	323
db9aaf0b	324	/* Check if slot is occupied */
8720d27d	325	slot = ctrl->slot;
82a9e79e	326	pciehp_get_adapter_status(slot, &value);
db9aaf0b KK	327	if (value) {
db9aaf0b KK	328	if (pciehp_force)
8720d27d	329	pciehp_enable_slot(slot);
db9aaf0b KK	330	} else {
	331	/* Power off slot if not occupied */
	332	if (POWER_CTRL(ctrl)) {
82a9e79e	333	rc = pciehp_power_off_slot(slot);
db9aaf0b KK	334	if (rc)
	335	goto err_out_free_ctrl_slot;
	336	}
1da177e4 LT	337	}
1da177e4 LT	338
1da177e4 LT	339	return 0;
	340
	341	err_out_free_ctrl_slot:
8720d27d	342	cleanup_slot(ctrl);
a8c2b635	343	err_out_release_ctlr:
82a9e79e	344	pciehp_release_ctrl(ctrl);
1da177e4 LT	345	err_out_none:
	346	return -ENODEV;
	347	}
	348
82a9e79e	349	static void pciehp_remove(struct pcie_device *dev)
1da177e4	350	{
b9708940	351	struct controller *ctrl = get_service_data(dev);
1da177e4	352
8720d27d	353	cleanup_slot(ctrl);
82a9e79e	354	pciehp_release_ctrl(ctrl);
1da177e4 LT	355	}
	356
	357	#ifdef CONFIG_PM
3a3c244c	358	static int pciehp_suspend (struct pcie_device *dev)
1da177e4	359	{
7f2feec1	360	dev_info(&dev->device, "%s ENTRY\n", __func__);
1da177e4 LT	361	return 0;
	362	}
	363
	364	static int pciehp_resume (struct pcie_device *dev)
	365	{
7f2feec1	366	dev_info(&dev->device, "%s ENTRY\n", __func__);
cd2fe83a	367	if (pciehp_force) {
b9708940	368	struct controller *ctrl = get_service_data(dev);
8720d27d	369	struct slot *slot;
cd2fe83a ML	370	u8 status;
	371
	372	/* reinitialize the chipset's event detection logic */
c4635eb0	373	pcie_enable_notification(ctrl);
cd2fe83a	374
8720d27d	375	slot = ctrl->slot;
cd2fe83a ML	376
cd2fe83a ML	377	/* Check if slot is occupied */
82a9e79e	378	pciehp_get_adapter_status(slot, &status);
cd2fe83a	379	if (status)
8720d27d	380	pciehp_enable_slot(slot);
cd2fe83a	381	else
8720d27d	382	pciehp_disable_slot(slot);
cd2fe83a	383	}
1da177e4 LT	384	return 0;
1da177e4 LT	385	}
3a3c244c	386	#endif /* PM */
1da177e4	387
1da177e4	388	static struct pcie_port_service_driver hpdriver_portdrv = {
83e9ad54	389	.name = PCIE_MODULE_NAME,
22106368 RW	390	.port_type = PCIE_ANY_PORT,
22106368 RW	391	.service = PCIE_PORT_SERVICE_HP,
1da177e4 LT	392
	393	.probe = pciehp_probe,
	394	.remove = pciehp_remove,
	395
	396	#ifdef CONFIG_PM
	397	.suspend = pciehp_suspend,
	398	.resume = pciehp_resume,
	399	#endif /* PM */
	400	};
	401
	402	static int __init pcied_init(void)
	403	{
	404	int retval = 0;
	405
c9ffa5a5	406	pciehp_firmware_init();
a8a2be94	407	retval = pcie_port_service_register(&hpdriver_portdrv);
	408	dbg("pcie_port_service_register = %d\n", retval);
	409	info(DRIVER_DESC " version: " DRIVER_VERSION "\n");
	410	if (retval)
18b341b7	411	dbg("Failure to register service\n");
1da177e4 LT	412	return retval;
	413	}
	414
	415	static void __exit pcied_cleanup(void)
	416	{
	417	dbg("unload_pciehpd()\n");
1da177e4	418	pcie_port_service_unregister(&hpdriver_portdrv);
1da177e4 LT	419	info(DRIVER_DESC " version: " DRIVER_VERSION " unloaded\n");
	420	}
	421
	422	module_init(pcied_init);
	423	module_exit(pcied_cleanup);