[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>
 *
 */

#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);

/**
 * 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->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->get_max_bus_speed = get_max_bus_speed;
	ops->get_cur_bus_speed = get_cur_bus_speed;
	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;
	}

	/* 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));

	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(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;

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

	hotplug_slot->info->attention_status = status;
	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
b308240b DS	75	/**
	76	* release_slot - free up the memory used by a slot
	77	* @hotplug_slot: slot to free
	78	*/
	79	static void release_slot(struct hotplug_slot *hotplug_slot)
	80	{
7f2feec1 TI	81	struct slot *slot = hotplug_slot->private;
7f2feec1 TI	82
18b341b7	83	ctrl_dbg(slot->ctrl, "%s: physical_slot = %s\n",
e1acb24f	84	__func__, hotplug_slot_name(hotplug_slot));
b308240b	85
586f1d66	86	kfree(hotplug_slot->ops);
c4635eb0 KK	87	kfree(hotplug_slot->info);
c4635eb0 KK	88	kfree(hotplug_slot);
a0b17257 KK	89	}
a0b17257 KK	90
8720d27d	91	static int init_slot(struct controller *ctrl)
1da177e4	92	{
8720d27d KK	93	struct slot *slot = ctrl->slot;
	94	struct hotplug_slot *hotplug = NULL;
	95	struct hotplug_slot_info *info = NULL;
586f1d66	96	struct hotplug_slot_ops *ops = NULL;
e1acb24f	97	char name[SLOT_NAME_SIZE];
a0b17257	98	int retval = -ENOMEM;
1da177e4	99
8720d27d KK	100	hotplug = kzalloc(sizeof(*hotplug), GFP_KERNEL);
	101	if (!hotplug)
	102	goto out;
	103
	104	info = kzalloc(sizeof(*info), GFP_KERNEL);
	105	if (!info)
	106	goto out;
	107
586f1d66 KK	108	/* Setup hotplug slot ops */
	109	ops = kzalloc(sizeof(*ops), GFP_KERNEL);
	110	if (!ops)
	111	goto out;
	112	ops->enable_slot = enable_slot;
	113	ops->disable_slot = disable_slot;
	114	ops->get_power_status = get_power_status;
	115	ops->get_adapter_status = get_adapter_status;
	116	ops->get_max_bus_speed = get_max_bus_speed;
	117	ops->get_cur_bus_speed = get_cur_bus_speed;
	118	if (MRL_SENS(ctrl))
	119	ops->get_latch_status = get_latch_status;
	120	if (ATTN_LED(ctrl)) {
	121	ops->get_attention_status = get_attention_status;
	122	ops->set_attention_status = set_attention_status;
	123	}
	124
8720d27d KK	125	/* register this slot with the hotplug pci core */
	126	hotplug->info = info;
	127	hotplug->private = slot;
	128	hotplug->release = &release_slot;
586f1d66	129	hotplug->ops = ops;
8720d27d	130	slot->hotplug_slot = hotplug;
07a09694	131	snprintf(name, SLOT_NAME_SIZE, "%u", PSN(ctrl));
8720d27d	132
a2359a33	133	ctrl_dbg(ctrl, "Registering domain:bus:dev=%04x:%02x:00 sun=%x\n",
385e2491	134	pci_domain_nr(ctrl->pcie->port->subordinate),
07a09694	135	ctrl->pcie->port->subordinate->number, PSN(ctrl));
8720d27d	136	retval = pci_hp_register(hotplug,
385e2491	137	ctrl->pcie->port->subordinate, 0, name);
8720d27d KK	138	if (retval) {
	139	ctrl_err(ctrl,
	140	"pci_hp_register failed with error %d\n", retval);
	141	goto out;
	142	}
	143	get_power_status(hotplug, &info->power_status);
	144	get_attention_status(hotplug, &info->attention_status);
	145	get_latch_status(hotplug, &info->latch_status);
	146	get_adapter_status(hotplug, &info->adapter_status);
	147	out:
	148	if (retval) {
586f1d66	149	kfree(ops);
8720d27d KK	150	kfree(info);
8720d27d KK	151	kfree(hotplug);
1da177e4	152	}
a0b17257	153	return retval;
1da177e4 LT	154	}
1da177e4 LT	155
8720d27d	156	static void cleanup_slot(struct controller *ctrl)
1da177e4	157	{
8720d27d	158	pci_hp_deregister(ctrl->slot->hotplug_slot);
1da177e4 LT	159	}
1da177e4 LT	160
1da177e4 LT	161	/*
	162	* set_attention_status - Turns the Amber LED for a slot on, off or blink
	163	*/
	164	static int set_attention_status(struct hotplug_slot *hotplug_slot, u8 status)
	165	{
	166	struct slot *slot = hotplug_slot->private;
	167
18b341b7	168	ctrl_dbg(slot->ctrl, "%s: physical_slot = %s\n",
e1acb24f	169	__func__, slot_name(slot));
1da177e4 LT	170
1da177e4 LT	171	hotplug_slot->info->attention_status = status;
586f1d66	172	pciehp_set_attention_status(slot, status);
1da177e4 LT	173
	174	return 0;
	175	}
	176
	177
	178	static int enable_slot(struct hotplug_slot *hotplug_slot)
	179	{
	180	struct slot *slot = hotplug_slot->private;
	181
18b341b7	182	ctrl_dbg(slot->ctrl, "%s: physical_slot = %s\n",
e1acb24f	183	__func__, slot_name(slot));
1da177e4	184
5d386e1a	185	return pciehp_sysfs_enable_slot(slot);
1da177e4 LT	186	}
	187
	188
	189	static int disable_slot(struct hotplug_slot *hotplug_slot)
	190	{
	191	struct slot *slot = hotplug_slot->private;
	192
18b341b7	193	ctrl_dbg(slot->ctrl, "%s: physical_slot = %s\n",
e1acb24f	194	__func__, slot_name(slot));
1da177e4	195
5d386e1a	196	return pciehp_sysfs_disable_slot(slot);
1da177e4 LT	197	}
	198
	199	static int get_power_status(struct hotplug_slot hotplug_slot, u8 value)
	200	{
	201	struct slot *slot = hotplug_slot->private;
	202	int retval;
	203
18b341b7	204	ctrl_dbg(slot->ctrl, "%s: physical_slot = %s\n",
e1acb24f	205	__func__, slot_name(slot));
1da177e4	206
82a9e79e	207	retval = pciehp_get_power_status(slot, value);
1da177e4 LT	208	if (retval < 0)
	209	*value = hotplug_slot->info->power_status;
	210
	211	return 0;
	212	}
	213
	214	static int get_attention_status(struct hotplug_slot hotplug_slot, u8 value)
	215	{
	216	struct slot *slot = hotplug_slot->private;
	217	int retval;
	218
18b341b7	219	ctrl_dbg(slot->ctrl, "%s: physical_slot = %s\n",
e1acb24f	220	__func__, slot_name(slot));
1da177e4	221
82a9e79e	222	retval = pciehp_get_attention_status(slot, value);
1da177e4 LT	223	if (retval < 0)
	224	*value = hotplug_slot->info->attention_status;
	225
	226	return 0;
	227	}
	228
	229	static int get_latch_status(struct hotplug_slot hotplug_slot, u8 value)
	230	{
	231	struct slot *slot = hotplug_slot->private;
	232	int retval;
	233
18b341b7	234	ctrl_dbg(slot->ctrl, "%s: physical_slot = %s\n",
e1acb24f	235	__func__, slot_name(slot));
1da177e4	236
82a9e79e	237	retval = pciehp_get_latch_status(slot, value);
1da177e4 LT	238	if (retval < 0)
	239	*value = hotplug_slot->info->latch_status;
	240
	241	return 0;
	242	}
	243
	244	static int get_adapter_status(struct hotplug_slot hotplug_slot, u8 value)
	245	{
	246	struct slot *slot = hotplug_slot->private;
	247	int retval;
	248
18b341b7	249	ctrl_dbg(slot->ctrl, "%s: physical_slot = %s\n",
e1acb24f	250	__func__, slot_name(slot));
1da177e4	251
82a9e79e	252	retval = pciehp_get_adapter_status(slot, value);
1da177e4 LT	253	if (retval < 0)
	254	*value = hotplug_slot->info->adapter_status;
	255
	256	return 0;
	257	}
	258
f46753c5 AC	259	static int get_max_bus_speed(struct hotplug_slot *hotplug_slot,
f46753c5 AC	260	enum pci_bus_speed *value)
1da177e4 LT	261	{
	262	struct slot *slot = hotplug_slot->private;
	263	int retval;
	264
18b341b7	265	ctrl_dbg(slot->ctrl, "%s: physical_slot = %s\n",
e1acb24f	266	__func__, slot_name(slot));
a073a826	267
82a9e79e	268	retval = pciehp_get_max_link_speed(slot, value);
1da177e4 LT	269	if (retval < 0)
	270	*value = PCI_SPEED_UNKNOWN;
	271
	272	return 0;
	273	}
	274
	275	static int get_cur_bus_speed(struct hotplug_slot hotplug_slot, enum pci_bus_speed value)
	276	{
	277	struct slot *slot = hotplug_slot->private;
	278	int retval;
	279
18b341b7	280	ctrl_dbg(slot->ctrl, "%s: physical_slot = %s\n",
e1acb24f	281	__func__, slot_name(slot));
a073a826	282
82a9e79e	283	retval = pciehp_get_cur_link_speed(slot, value);
1da177e4 LT	284	if (retval < 0)
	285	*value = PCI_SPEED_UNKNOWN;
	286
	287	return 0;
	288	}
	289
0516c8bc	290	static int pciehp_probe(struct pcie_device *dev)
1da177e4 LT	291	{
	292	int rc;
	293	struct controller *ctrl;
8720d27d	294	struct slot *slot;
1da177e4	295	u8 value;
125c39f7 KK	296	struct pci_dev *pdev = dev->port;
	297
	298	if (pciehp_force)
7f2feec1 TI	299	dev_info(&dev->device,
	300	"Bypassing BIOS check for pciehp use on %s\n",
	301	pci_name(pdev));
125c39f7 KK	302	else if (pciehp_get_hp_hw_control_from_firmware(pdev))
125c39f7 KK	303	goto err_out_none;
a073a826	304
c4635eb0	305	ctrl = pcie_init(dev);
1da177e4	306	if (!ctrl) {
18b341b7	307	dev_err(&dev->device, "Controller initialization failed\n");
c4635eb0	308	goto err_out_none;
1da177e4	309	}
b9708940	310	set_service_data(dev, ctrl);
1da177e4	311
1da177e4	312	/* Setup the slot information structures */
8720d27d	313	rc = init_slot(ctrl);
1da177e4	314	if (rc) {
f46753c5	315	if (rc == -EBUSY)
18b341b7	316	ctrl_warn(ctrl, "Slot already registered by another "
7f2feec1	317	"hotplug driver\n");
f46753c5	318	else
18b341b7	319	ctrl_err(ctrl, "Slot initialization failed\n");
a8c2b635	320	goto err_out_release_ctlr;
1da177e4 LT	321	}
1da177e4 LT	322
dbc7e1e5 EB	323	/* Enable events after we have setup the data structures */
	324	rc = pcie_init_notification(ctrl);
	325	if (rc) {
	326	ctrl_err(ctrl, "Notification initialization failed\n");
	327	goto err_out_release_ctlr;
	328	}
	329
db9aaf0b	330	/* Check if slot is occupied */
8720d27d	331	slot = ctrl->slot;
82a9e79e	332	pciehp_get_adapter_status(slot, &value);
db9aaf0b KK	333	if (value) {
db9aaf0b KK	334	if (pciehp_force)
8720d27d	335	pciehp_enable_slot(slot);
db9aaf0b KK	336	} else {
	337	/* Power off slot if not occupied */
	338	if (POWER_CTRL(ctrl)) {
82a9e79e	339	rc = pciehp_power_off_slot(slot);
db9aaf0b KK	340	if (rc)
	341	goto err_out_free_ctrl_slot;
	342	}
1da177e4 LT	343	}
1da177e4 LT	344
1da177e4 LT	345	return 0;
	346
	347	err_out_free_ctrl_slot:
8720d27d	348	cleanup_slot(ctrl);
a8c2b635	349	err_out_release_ctlr:
82a9e79e	350	pciehp_release_ctrl(ctrl);
1da177e4 LT	351	err_out_none:
	352	return -ENODEV;
	353	}
	354
82a9e79e	355	static void pciehp_remove(struct pcie_device *dev)
1da177e4	356	{
b9708940	357	struct controller *ctrl = get_service_data(dev);
1da177e4	358
8720d27d	359	cleanup_slot(ctrl);
82a9e79e	360	pciehp_release_ctrl(ctrl);
1da177e4 LT	361	}
	362
	363	#ifdef CONFIG_PM
3a3c244c	364	static int pciehp_suspend (struct pcie_device *dev)
1da177e4	365	{
7f2feec1	366	dev_info(&dev->device, "%s ENTRY\n", __func__);
1da177e4 LT	367	return 0;
	368	}
	369
	370	static int pciehp_resume (struct pcie_device *dev)
	371	{
7f2feec1	372	dev_info(&dev->device, "%s ENTRY\n", __func__);
cd2fe83a	373	if (pciehp_force) {
b9708940	374	struct controller *ctrl = get_service_data(dev);
8720d27d	375	struct slot *slot;
cd2fe83a ML	376	u8 status;
	377
	378	/* reinitialize the chipset's event detection logic */
c4635eb0	379	pcie_enable_notification(ctrl);
cd2fe83a	380
8720d27d	381	slot = ctrl->slot;
cd2fe83a ML	382
cd2fe83a ML	383	/* Check if slot is occupied */
82a9e79e	384	pciehp_get_adapter_status(slot, &status);
cd2fe83a	385	if (status)
8720d27d	386	pciehp_enable_slot(slot);
cd2fe83a	387	else
8720d27d	388	pciehp_disable_slot(slot);
cd2fe83a	389	}
1da177e4 LT	390	return 0;
1da177e4 LT	391	}
3a3c244c	392	#endif /* PM */
1da177e4	393
1da177e4	394	static struct pcie_port_service_driver hpdriver_portdrv = {
83e9ad54	395	.name = PCIE_MODULE_NAME,
22106368 RW	396	.port_type = PCIE_ANY_PORT,
22106368 RW	397	.service = PCIE_PORT_SERVICE_HP,
1da177e4 LT	398
	399	.probe = pciehp_probe,
	400	.remove = pciehp_remove,
	401
	402	#ifdef CONFIG_PM
	403	.suspend = pciehp_suspend,
	404	.resume = pciehp_resume,
	405	#endif /* PM */
	406	};
	407
	408	static int __init pcied_init(void)
	409	{
	410	int retval = 0;
	411
c9ffa5a5	412	pciehp_firmware_init();
a8a2be94 RS	413	retval = pcie_port_service_register(&hpdriver_portdrv);
	414	dbg("pcie_port_service_register = %d\n", retval);
	415	info(DRIVER_DESC " version: " DRIVER_VERSION "\n");
	416	if (retval)
18b341b7	417	dbg("Failure to register service\n");
1da177e4 LT	418	return retval;
	419	}
	420
	421	static void __exit pcied_cleanup(void)
	422	{
	423	dbg("unload_pciehpd()\n");
1da177e4	424	pcie_port_service_unregister(&hpdriver_portdrv);
1da177e4 LT	425	info(DRIVER_DESC " version: " DRIVER_VERSION " unloaded\n");
	426	}
	427
	428	module_init(pcied_init);
	429	module_exit(pcied_cleanup);