[mirror_ubuntu-bionic-kernel.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>
 *
 * Authors:
 *   Dan Zink <dan.zink@compaq.com>
 *   Greg Kroah-Hartman <greg@kroah.com>
 *   Dely Sy <dely.l.sy@intel.com>"
 */

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

/* Global variables */
bool pciehp_debug;
bool pciehp_poll_mode;
int pciehp_poll_time;
static bool pciehp_force;

/*
 * not really modular, but the easiest way to keep compat with existing
 * bootargs behaviour is to continue using module_param here.
 */
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 OSHP is 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 reset_slot(struct hotplug_slot *slot, int probe);

/**
 * release_slot - free up the memory used by a slot
 * @hotplug_slot: slot to free
 */
static void release_slot(struct hotplug_slot *hotplug_slot)
{
	kfree(hotplug_slot->ops);
	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;
	struct hotplug_slot_ops *ops = 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;

	/* Setup hotplug slot ops */
	ops = kzalloc(sizeof(*ops), GFP_KERNEL);
	if (!ops)
		goto out;

	ops->enable_slot = enable_slot;
	ops->disable_slot = disable_slot;
	ops->get_power_status = get_power_status;
	ops->get_adapter_status = get_adapter_status;
	ops->reset_slot = reset_slot;
	if (MRL_SENS(ctrl))
		ops->get_latch_status = get_latch_status;
	if (ATTN_LED(ctrl)) {
		ops->get_attention_status = get_attention_status;
		ops->set_attention_status = set_attention_status;
	} else if (ctrl->pcie->port->hotplug_user_indicators) {
		ops->get_attention_status = pciehp_get_raw_indicator_status;
		ops->set_attention_status = pciehp_set_raw_indicator_status;
	}

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

	retval = pci_hp_register(hotplug,
				 ctrl->pcie->port->subordinate, 0, name);
	if (retval)
		ctrl_err(ctrl, "pci_hp_register failed: error %d\n", retval);
out:
	if (retval) {
		kfree(ops);
		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;

	pciehp_set_attention_status(slot, status);
	return 0;
}


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

	return pciehp_sysfs_enable_slot(slot);
}


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

	return pciehp_sysfs_disable_slot(slot);
}

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

	pciehp_get_power_status(slot, value);
	return 0;
}

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

	pciehp_get_attention_status(slot, value);
	return 0;
}

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

	pciehp_get_latch_status(slot, value);
	return 0;
}

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

	pciehp_get_adapter_status(slot, value);
	return 0;
}

static int reset_slot(struct hotplug_slot *hotplug_slot, int probe)
{
	struct slot *slot = hotplug_slot->private;

	return pciehp_reset_slot(slot, probe);
}

static int pciehp_probe(struct pcie_device *dev)
{
	int rc;
	struct controller *ctrl;
	struct slot *slot;
	u8 occupied, poweron;

	/* If this is not a "hotplug" service, we have no business here. */
	if (dev->service != PCIE_PORT_SERVICE_HP)
		return -ENODEV;

	if (!dev->port->subordinate) {
		/* Can happen if we run out of bus numbers during probe */
		dev_err(&dev->device,
			"Hotplug bridge without secondary bus, ignoring\n");
		return -ENODEV;
	}

	ctrl = pcie_init(dev);
	if (!ctrl) {
		dev_err(&dev->device, "Controller initialization failed\n");
		return -ENODEV;
	}
	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 (%d)\n", rc);
		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 (%d)\n", rc);
		goto err_out_free_ctrl_slot;
	}

	/* Check if slot is occupied */
	slot = ctrl->slot;
	pciehp_get_adapter_status(slot, &occupied);
	pciehp_get_power_status(slot, &poweron);
	if (occupied && pciehp_force) {
		mutex_lock(&slot->hotplug_lock);
		pciehp_enable_slot(slot);
		mutex_unlock(&slot->hotplug_lock);
	}
	/* If empty slot's power status is on, turn power off */
	if (!occupied && poweron && POWER_CTRL(ctrl))
		pciehp_power_off_slot(slot);

	return 0;

err_out_free_ctrl_slot:
	cleanup_slot(ctrl);
err_out_release_ctlr:
	pciehp_release_ctrl(ctrl);
	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)
{
	return 0;
}

static int pciehp_resume(struct pcie_device *dev)
{
	struct controller *ctrl;
	struct slot *slot;
	u8 status;

	ctrl = get_service_data(dev);

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

	slot = ctrl->slot;

	/* Check if slot is occupied */
	pciehp_get_adapter_status(slot, &status);
	mutex_lock(&slot->hotplug_lock);
	if (status)
		pciehp_enable_slot(slot);
	else
		pciehp_disable_slot(slot);
	mutex_unlock(&slot->hotplug_lock);
	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;

	retval = pcie_port_service_register(&hpdriver_portdrv);
	dbg("pcie_port_service_register = %d\n", retval);
	if (retval)
		dbg("Failure to register service\n");

	return retval;
}
device_initcall(pcied_init);
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	27	*
5fbeef63 BH	28	* Authors:
	29	* Dan Zink <dan.zink@compaq.com>
	30	* Greg Kroah-Hartman <greg@kroah.com>
	31	* Dely Sy <dely.l.sy@intel.com>"
1da177e4 LT	32	*/
1da177e4 LT	33
1da177e4 LT	34	#include <linux/moduleparam.h>
1da177e4 LT	35	#include <linux/kernel.h>
5a0e3ad6	36	#include <linux/slab.h>
1da177e4	37	#include <linux/types.h>
1da177e4	38	#include <linux/pci.h>
1da177e4	39	#include "pciehp.h"
1da177e4	40	#include <linux/interrupt.h>
34d03419	41	#include <linux/time.h>
1da177e4 LT	42
1da177e4 LT	43	/* Global variables */
90ab5ee9 RR	44	bool pciehp_debug;
90ab5ee9 RR	45	bool pciehp_poll_mode;
1da177e4	46	int pciehp_poll_time;
0b950f0f	47	static bool pciehp_force;
1da177e4	48
70626d88 PG	49	/*
	50	* not really modular, but the easiest way to keep compat with existing
	51	* bootargs behaviour is to continue using module_param here.
	52	*/
1da177e4 LT	53	module_param(pciehp_debug, bool, 0644);
	54	module_param(pciehp_poll_mode, bool, 0644);
	55	module_param(pciehp_poll_time, int, 0644);
a3a45ec8	56	module_param(pciehp_force, bool, 0644);
1da177e4 LT	57	MODULE_PARM_DESC(pciehp_debug, "Debugging mode enabled or not");
	58	MODULE_PARM_DESC(pciehp_poll_mode, "Using polling mechanism for hot-plug events or not");
	59	MODULE_PARM_DESC(pciehp_poll_time, "Polling mechanism frequency, in seconds");
28eb5f27	60	MODULE_PARM_DESC(pciehp_force, "Force pciehp, even if OSHP is missing");
1da177e4 LT	61
	62	#define PCIE_MODULE_NAME "pciehp"
	63
ff3ce480 BS	64	static int set_attention_status(struct hotplug_slot *slot, u8 value);
	65	static int enable_slot(struct hotplug_slot *slot);
	66	static int disable_slot(struct hotplug_slot *slot);
	67	static int get_power_status(struct hotplug_slot slot, u8 value);
	68	static int get_attention_status(struct hotplug_slot slot, u8 value);
	69	static int get_latch_status(struct hotplug_slot slot, u8 value);
	70	static int get_adapter_status(struct hotplug_slot slot, u8 value);
	71	static int reset_slot(struct hotplug_slot *slot, int probe);
1da177e4	72
b308240b DS	73	/**
	74	* release_slot - free up the memory used by a slot
	75	* @hotplug_slot: slot to free
	76	*/
	77	static void release_slot(struct hotplug_slot *hotplug_slot)
	78	{
586f1d66	79	kfree(hotplug_slot->ops);
c4635eb0 KK	80	kfree(hotplug_slot->info);
c4635eb0 KK	81	kfree(hotplug_slot);
a0b17257 KK	82	}
a0b17257 KK	83
8720d27d	84	static int init_slot(struct controller *ctrl)
1da177e4	85	{
8720d27d KK	86	struct slot *slot = ctrl->slot;
	87	struct hotplug_slot *hotplug = NULL;
	88	struct hotplug_slot_info *info = NULL;
586f1d66	89	struct hotplug_slot_ops *ops = NULL;
e1acb24f	90	char name[SLOT_NAME_SIZE];
a0b17257	91	int retval = -ENOMEM;
1da177e4	92
8720d27d KK	93	hotplug = kzalloc(sizeof(*hotplug), GFP_KERNEL);
	94	if (!hotplug)
	95	goto out;
	96
	97	info = kzalloc(sizeof(*info), GFP_KERNEL);
	98	if (!info)
	99	goto out;
	100
586f1d66 KK	101	/* Setup hotplug slot ops */
	102	ops = kzalloc(sizeof(*ops), GFP_KERNEL);
	103	if (!ops)
	104	goto out;
9cad7f58	105
586f1d66 KK	106	ops->enable_slot = enable_slot;
	107	ops->disable_slot = disable_slot;
	108	ops->get_power_status = get_power_status;
	109	ops->get_adapter_status = get_adapter_status;
2e35afae	110	ops->reset_slot = reset_slot;
586f1d66 KK	111	if (MRL_SENS(ctrl))
	112	ops->get_latch_status = get_latch_status;
	113	if (ATTN_LED(ctrl)) {
	114	ops->get_attention_status = get_attention_status;
	115	ops->set_attention_status = set_attention_status;
576243b3 KB	116	} else if (ctrl->pcie->port->hotplug_user_indicators) {
	117	ops->get_attention_status = pciehp_get_raw_indicator_status;
	118	ops->set_attention_status = pciehp_set_raw_indicator_status;
586f1d66 KK	119	}
586f1d66 KK	120
8720d27d KK	121	/* register this slot with the hotplug pci core */
	122	hotplug->info = info;
	123	hotplug->private = slot;
	124	hotplug->release = &release_slot;
586f1d66	125	hotplug->ops = ops;
8720d27d	126	slot->hotplug_slot = hotplug;
07a09694	127	snprintf(name, SLOT_NAME_SIZE, "%u", PSN(ctrl));
8720d27d	128
8720d27d	129	retval = pci_hp_register(hotplug,
385e2491	130	ctrl->pcie->port->subordinate, 0, name);
445f7985	131	if (retval)
3784e0c6	132	ctrl_err(ctrl, "pci_hp_register failed: error %d\n", retval);
8720d27d KK	133	out:
8720d27d KK	134	if (retval) {
586f1d66	135	kfree(ops);
8720d27d KK	136	kfree(info);
8720d27d KK	137	kfree(hotplug);
1da177e4	138	}
a0b17257	139	return retval;
1da177e4 LT	140	}
1da177e4 LT	141
8720d27d	142	static void cleanup_slot(struct controller *ctrl)
1da177e4	143	{
8720d27d	144	pci_hp_deregister(ctrl->slot->hotplug_slot);
1da177e4 LT	145	}
1da177e4 LT	146
1da177e4 LT	147	/*
	148	* set_attention_status - Turns the Amber LED for a slot on, off or blink
	149	*/
	150	static int set_attention_status(struct hotplug_slot *hotplug_slot, u8 status)
	151	{
	152	struct slot *slot = hotplug_slot->private;
	153
6dae6202 BH	154	pciehp_set_attention_status(slot, status);
6dae6202 BH	155	return 0;
1da177e4 LT	156	}
	157
	158
	159	static int enable_slot(struct hotplug_slot *hotplug_slot)
	160	{
	161	struct slot *slot = hotplug_slot->private;
	162
5d386e1a	163	return pciehp_sysfs_enable_slot(slot);
1da177e4 LT	164	}
	165
	166
	167	static int disable_slot(struct hotplug_slot *hotplug_slot)
	168	{
	169	struct slot *slot = hotplug_slot->private;
	170
5d386e1a	171	return pciehp_sysfs_disable_slot(slot);
1da177e4 LT	172	}
	173
	174	static int get_power_status(struct hotplug_slot hotplug_slot, u8 value)
	175	{
	176	struct slot *slot = hotplug_slot->private;
1da177e4	177
6dae6202 BH	178	pciehp_get_power_status(slot, value);
6dae6202 BH	179	return 0;
1da177e4 LT	180	}
	181
	182	static int get_attention_status(struct hotplug_slot hotplug_slot, u8 value)
	183	{
	184	struct slot *slot = hotplug_slot->private;
1da177e4	185
6dae6202 BH	186	pciehp_get_attention_status(slot, value);
6dae6202 BH	187	return 0;
1da177e4 LT	188	}
	189
	190	static int get_latch_status(struct hotplug_slot hotplug_slot, u8 value)
	191	{
	192	struct slot *slot = hotplug_slot->private;
1da177e4	193
6dae6202 BH	194	pciehp_get_latch_status(slot, value);
6dae6202 BH	195	return 0;
1da177e4 LT	196	}
	197
	198	static int get_adapter_status(struct hotplug_slot hotplug_slot, u8 value)
	199	{
	200	struct slot *slot = hotplug_slot->private;
1da177e4	201
6dae6202 BH	202	pciehp_get_adapter_status(slot, value);
6dae6202 BH	203	return 0;
1da177e4 LT	204	}
1da177e4 LT	205
2e35afae AW	206	static int reset_slot(struct hotplug_slot *hotplug_slot, int probe)
	207	{
	208	struct slot *slot = hotplug_slot->private;
	209
2e35afae AW	210	return pciehp_reset_slot(slot, probe);
	211	}
	212
0516c8bc	213	static int pciehp_probe(struct pcie_device *dev)
1da177e4 LT	214	{
	215	int rc;
	216	struct controller *ctrl;
8720d27d	217	struct slot *slot;
8792e11f	218	u8 occupied, poweron;
125c39f7	219
e705c295 RW	220	/* If this is not a "hotplug" service, we have no business here. */
	221	if (dev->service != PCIE_PORT_SERVICE_HP)
	222	return -ENODEV;
a073a826	223
62e4492c AN	224	if (!dev->port->subordinate) {
	225	/* Can happen if we run out of bus numbers during probe */
	226	dev_err(&dev->device,
	227	"Hotplug bridge without secondary bus, ignoring\n");
2af31f41	228	return -ENODEV;
62e4492c AN	229	}
62e4492c AN	230
c4635eb0	231	ctrl = pcie_init(dev);
1da177e4	232	if (!ctrl) {
18b341b7	233	dev_err(&dev->device, "Controller initialization failed\n");
2af31f41	234	return -ENODEV;
1da177e4	235	}
b9708940	236	set_service_data(dev, ctrl);
1da177e4	237
1da177e4	238	/* Setup the slot information structures */
8720d27d	239	rc = init_slot(ctrl);
1da177e4	240	if (rc) {
f46753c5	241	if (rc == -EBUSY)
227f0647	242	ctrl_warn(ctrl, "Slot already registered by another hotplug driver\n");
f46753c5	243	else
3784e0c6	244	ctrl_err(ctrl, "Slot initialization failed (%d)\n", rc);
a8c2b635	245	goto err_out_release_ctlr;
1da177e4 LT	246	}
1da177e4 LT	247
dbc7e1e5 EB	248	/* Enable events after we have setup the data structures */
	249	rc = pcie_init_notification(ctrl);
	250	if (rc) {
3784e0c6	251	ctrl_err(ctrl, "Notification initialization failed (%d)\n", rc);
65b947bc	252	goto err_out_free_ctrl_slot;
dbc7e1e5 EB	253	}
dbc7e1e5 EB	254
db9aaf0b	255	/* Check if slot is occupied */
8720d27d	256	slot = ctrl->slot;
8792e11f KK	257	pciehp_get_adapter_status(slot, &occupied);
8792e11f KK	258	pciehp_get_power_status(slot, &poweron);
50b52fde RJ	259	if (occupied && pciehp_force) {
50b52fde RJ	260	mutex_lock(&slot->hotplug_lock);
8792e11f	261	pciehp_enable_slot(slot);
50b52fde RJ	262	mutex_unlock(&slot->hotplug_lock);
50b52fde RJ	263	}
8792e11f KK	264	/* If empty slot's power status is on, turn power off */
	265	if (!occupied && poweron && POWER_CTRL(ctrl))
	266	pciehp_power_off_slot(slot);
1da177e4	267
1da177e4 LT	268	return 0;
	269
	270	err_out_free_ctrl_slot:
8720d27d	271	cleanup_slot(ctrl);
a8c2b635	272	err_out_release_ctlr:
82a9e79e	273	pciehp_release_ctrl(ctrl);
1da177e4 LT	274	return -ENODEV;
	275	}
	276
82a9e79e	277	static void pciehp_remove(struct pcie_device *dev)
1da177e4	278	{
b9708940	279	struct controller *ctrl = get_service_data(dev);
1da177e4	280
8720d27d	281	cleanup_slot(ctrl);
82a9e79e	282	pciehp_release_ctrl(ctrl);
1da177e4 LT	283	}
	284
	285	#ifdef CONFIG_PM
3c78bc61	286	static int pciehp_suspend(struct pcie_device *dev)
1da177e4	287	{
1da177e4 LT	288	return 0;
	289	}
	290
3c78bc61	291	static int pciehp_resume(struct pcie_device *dev)
1da177e4	292	{
87683e22 ON	293	struct controller *ctrl;
	294	struct slot *slot;
	295	u8 status;
	296
87683e22	297	ctrl = get_service_data(dev);
cd2fe83a	298
87683e22	299	/* reinitialize the chipset's event detection logic */
83d19c06	300	pcie_reenable_notification(ctrl);
cd2fe83a	301
87683e22	302	slot = ctrl->slot;
cd2fe83a	303
87683e22 ON	304	/* Check if slot is occupied */
87683e22 ON	305	pciehp_get_adapter_status(slot, &status);
50b52fde	306	mutex_lock(&slot->hotplug_lock);
87683e22 ON	307	if (status)
	308	pciehp_enable_slot(slot);
	309	else
	310	pciehp_disable_slot(slot);
50b52fde	311	mutex_unlock(&slot->hotplug_lock);
1da177e4 LT	312	return 0;
1da177e4 LT	313	}
3a3c244c	314	#endif /* PM */
1da177e4	315
1da177e4	316	static struct pcie_port_service_driver hpdriver_portdrv = {
83e9ad54	317	.name = PCIE_MODULE_NAME,
22106368 RW	318	.port_type = PCIE_ANY_PORT,
22106368 RW	319	.service = PCIE_PORT_SERVICE_HP,
1da177e4 LT	320
	321	.probe = pciehp_probe,
	322	.remove = pciehp_remove,
	323
	324	#ifdef CONFIG_PM
	325	.suspend = pciehp_suspend,
	326	.resume = pciehp_resume,
	327	#endif /* PM */
	328	};
	329
	330	static int __init pcied_init(void)
	331	{
	332	int retval = 0;
	333
a8a2be94	334	retval = pcie_port_service_register(&hpdriver_portdrv);
f7625980	335	dbg("pcie_port_service_register = %d\n", retval);
c2be6f93	336	if (retval)
18b341b7	337	dbg("Failure to register service\n");
c2be6f93	338
1da177e4 LT	339	return retval;
1da177e4 LT	340	}
70626d88	341	device_initcall(pcied_init);