[mirror_ubuntu-jammy-kernel.git] / drivers / pci / hotplug / rpaphp_core.c

/*
 * PCI Hot Plug Controller Driver for RPA-compliant PPC64 platform.
 * Copyright (C) 2003 Linda Xie <lxie@us.ibm.com>
 *
 * 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 <lxie@us.ibm.com>
 *
 */
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/moduleparam.h>
#include <linux/pci.h>
#include <linux/pci_hotplug.h>
#include <linux/slab.h>
#include <linux/smp.h>
#include <linux/smp_lock.h>
#include <linux/init.h>
#include <asm/eeh.h>       /* for eeh_add_device() */
#include <asm/rtas.h>		/* rtas_call */
#include <asm/pci-bridge.h>	/* for pci_controller */
#include "../pci.h"		/* for pci_add_new_bus */
				/* and pci_do_scan_bus */
#include "rpaphp.h"

int debug;
static struct semaphore rpaphp_sem;
LIST_HEAD(rpaphp_slot_head);
int num_slots;

#define DRIVER_VERSION	"0.1"
#define DRIVER_AUTHOR	"Linda Xie <lxie@us.ibm.com>"
#define DRIVER_DESC	"RPA HOT Plug PCI Controller Driver"

#define MAX_LOC_CODE 128

MODULE_AUTHOR(DRIVER_AUTHOR);
MODULE_DESCRIPTION(DRIVER_DESC);
MODULE_LICENSE("GPL");

module_param(debug, bool, 0644);

static int rpaphp_get_attention_status(struct slot *slot)
{
	return slot->hotplug_slot->info->attention_status;
}

/**
 * set_attention_status - set attention LED
 * echo 0 > attention -- set LED OFF
 * echo 1 > attention -- set LED ON
 * echo 2 > attention -- set LED ID(identify, light is blinking)
 *
 */
static int set_attention_status(struct hotplug_slot *hotplug_slot, u8 value)
{
	int retval = 0;
	struct slot *slot = (struct slot *)hotplug_slot->private;

	down(&rpaphp_sem);
	switch (value) {
	case 0:
		retval = rpaphp_set_attention_status(slot, LED_OFF);
		hotplug_slot->info->attention_status = 0;
		break;
	case 1:
	default:
		retval = rpaphp_set_attention_status(slot, LED_ON);
		hotplug_slot->info->attention_status = 1;
		break;
	case 2:
		retval = rpaphp_set_attention_status(slot, LED_ID);
		hotplug_slot->info->attention_status = 2;
		break;
	}
	up(&rpaphp_sem);
	return retval;
}

/**
 * get_power_status - get power status of a slot
 * @hotplug_slot: slot to get status
 * @value: pointer to store status
 *
 *
 */
static int get_power_status(struct hotplug_slot *hotplug_slot, u8 * value)
{
	int retval;
	struct slot *slot = (struct slot *)hotplug_slot->private;

	down(&rpaphp_sem);
	retval = rpaphp_get_power_status(slot, value);
	up(&rpaphp_sem);
	return retval;
}

/**
 * get_attention_status - get attention LED status
 *
 *
 */
static int get_attention_status(struct hotplug_slot *hotplug_slot, u8 * value)
{
	int retval = 0;
	struct slot *slot = (struct slot *)hotplug_slot->private;

	down(&rpaphp_sem);
	*value = rpaphp_get_attention_status(slot);
	up(&rpaphp_sem);
	return retval;
}

static int get_adapter_status(struct hotplug_slot *hotplug_slot, u8 * value)
{
	struct slot *slot = (struct slot *)hotplug_slot->private;
	int retval = 0;

	down(&rpaphp_sem);
	retval = rpaphp_get_pci_adapter_status(slot, 0, value);
	up(&rpaphp_sem);
	return retval;
}

static int get_max_bus_speed(struct hotplug_slot *hotplug_slot, enum pci_bus_speed *value)
{
	struct slot *slot = (struct slot *)hotplug_slot->private;

	down(&rpaphp_sem);
	switch (slot->type) {
	case 1:
	case 2:
	case 3:
	case 4:
	case 5:
	case 6:
		*value = PCI_SPEED_33MHz;	/* speed for case 1-6 */
		break;
	case 7:
	case 8:
		*value = PCI_SPEED_66MHz;
		break;
	case 11:
	case 14:
		*value = PCI_SPEED_66MHz_PCIX;
		break;
	case 12:
	case 15:
		*value = PCI_SPEED_100MHz_PCIX;
		break;
	case 13:
	case 16:
		*value = PCI_SPEED_133MHz_PCIX;
		break;
	default:
		*value = PCI_SPEED_UNKNOWN;
		break;

	}
	up(&rpaphp_sem);
	return 0;
}

static int get_children_props(struct device_node *dn, const int **drc_indexes,
		const int **drc_names, const int **drc_types,
		const int **drc_power_domains)
{
	const int *indexes, *names, *types, *domains;

	indexes = of_get_property(dn, "ibm,drc-indexes", NULL);
	names = of_get_property(dn, "ibm,drc-names", NULL);
	types = of_get_property(dn, "ibm,drc-types", NULL);
	domains = of_get_property(dn, "ibm,drc-power-domains", NULL);

	if (!indexes || !names || !types || !domains) {
		/* Slot does not have dynamically-removable children */
		return -EINVAL;
	}
	if (drc_indexes)
		*drc_indexes = indexes;
	if (drc_names)
		/* &drc_names[1] contains NULL terminated slot names */
		*drc_names = names;
	if (drc_types)
		/* &drc_types[1] contains NULL terminated slot types */
		*drc_types = types;
	if (drc_power_domains)
		*drc_power_domains = domains;

	return 0;
}

/* To get the DRC props describing the current node, first obtain it's
 * my-drc-index property.  Next obtain the DRC list from it's parent.  Use
 * the my-drc-index for correlation, and obtain the requested properties.
 */
int rpaphp_get_drc_props(struct device_node *dn, int *drc_index,
		char **drc_name, char **drc_type, int *drc_power_domain)
{
	const int *indexes, *names;
	const int *types, *domains;
	const unsigned int *my_index;
	char *name_tmp, *type_tmp;
	int i, rc;

	my_index = of_get_property(dn, "ibm,my-drc-index", NULL);
	if (!my_index) {
		/* Node isn't DLPAR/hotplug capable */
		return -EINVAL;
	}

	rc = get_children_props(dn->parent, &indexes, &names, &types, &domains);
	if (rc < 0) {
		return -EINVAL;
	}

	name_tmp = (char *) &names[1];
	type_tmp = (char *) &types[1];

	/* Iterate through parent properties, looking for my-drc-index */
	for (i = 0; i < indexes[0]; i++) {
		if ((unsigned int) indexes[i + 1] == *my_index) {
			if (drc_name)
                		*drc_name = name_tmp;
			if (drc_type)
				*drc_type = type_tmp;
			if (drc_index)
				*drc_index = *my_index;
			if (drc_power_domain)
				*drc_power_domain = domains[i+1];
			return 0;
		}
		name_tmp += (strlen(name_tmp) + 1);
		type_tmp += (strlen(type_tmp) + 1);
	}

	return -EINVAL;
}

static int is_php_type(char *drc_type)
{
	unsigned long value;
	char *endptr;

	/* PCI Hotplug nodes have an integer for drc_type */
	value = simple_strtoul(drc_type, &endptr, 10);
	if (endptr == drc_type)
		return 0;

	return 1;
}

static int is_php_dn(struct device_node *dn, const int **indexes,
		const int **names, const int **types, const int **power_domains)
{
	const int *drc_types;
	int rc;

	rc = get_children_props(dn, indexes, names, &drc_types, power_domains);
	if (rc >= 0) {
		if (is_php_type((char *) &drc_types[1])) {
			*types = drc_types;
			return 1;
		}
	}

	return 0;
}

/**
 * rpaphp_add_slot -- add hotplug or dlpar slot
 *
 *	rpaphp not only registers PCI hotplug slots(HOTPLUG), 
 *	but also logical DR slots(EMBEDDED).
 *	HOTPLUG slot: An adapter can be physically added/removed. 
 *	EMBEDDED slot: An adapter can be logically removed/added
 *		  from/to a partition with the slot.
 */
int rpaphp_add_slot(struct device_node *dn)
{
	struct slot *slot;
	int retval = 0;
	int i;
	const int *indexes, *names, *types, *power_domains;
	char *name, *type;

	dbg("Entry %s: dn->full_name=%s\n", __FUNCTION__, dn->full_name);

	/* register PCI devices */
	if (dn->name != 0 && strcmp(dn->name, "pci") == 0) {
		if (!is_php_dn(dn, &indexes, &names, &types, &power_domains))
			goto exit;

		name = (char *) &names[1];
		type = (char *) &types[1];
		for (i = 0; i < indexes[0]; i++,
	     		name += (strlen(name) + 1), type += (strlen(type) + 1)) 		{

			if (!(slot = alloc_slot_struct(dn, indexes[i + 1], name,
				       power_domains[i + 1]))) {
				retval = -ENOMEM;
				goto exit;
			}
			slot->type = simple_strtoul(type, NULL, 10);
				
			dbg("Found drc-index:0x%x drc-name:%s drc-type:%s\n",
					indexes[i + 1], name, type);

			retval = rpaphp_register_pci_slot(slot);
		}
	}
exit:
	dbg("%s - Exit: num_slots=%d rc[%d]\n",
	    __FUNCTION__, num_slots, retval);
	return retval;
}

static void __exit cleanup_slots(void)
{
	struct list_head *tmp, *n;
	struct slot *slot;

	/*
	 * Unregister all of our slots with the pci_hotplug subsystem,
	 * and free up all memory that we had allocated.
	 * memory will be freed in release_slot callback. 
	 */

	list_for_each_safe(tmp, n, &rpaphp_slot_head) {
		slot = list_entry(tmp, struct slot, rpaphp_slot_list);
		list_del(&slot->rpaphp_slot_list);
		pci_hp_deregister(slot->hotplug_slot);
	}
	return;
}

static int __init rpaphp_init(void)
{
	struct device_node *dn = NULL;

	info(DRIVER_DESC " version: " DRIVER_VERSION "\n");
	init_MUTEX(&rpaphp_sem);

	while ((dn = of_find_node_by_name(dn, "pci")))
		rpaphp_add_slot(dn);

	return 0;
}

static void __exit rpaphp_exit(void)
{
	cleanup_slots();
}

static int __enable_slot(struct slot *slot)
{
	int state;
	int retval;

	if (slot->state == CONFIGURED)
		return 0;

	retval = rpaphp_get_sensor_state(slot, &state);
	if (retval)
		return retval;

	if (state == PRESENT) {
		pcibios_add_pci_devices(slot->bus);
		slot->state = CONFIGURED;
	} else if (state == EMPTY) {
		slot->state = EMPTY;
	} else {
		err("%s: slot[%s] is in invalid state\n", __FUNCTION__, slot->name);
		slot->state = NOT_VALID;
		return -EINVAL;
	}
	return 0;
}

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

	down(&rpaphp_sem);
	retval = __enable_slot(slot);
	up(&rpaphp_sem);

	return retval;
}

static int __disable_slot(struct slot *slot)
{
	struct pci_dev *dev, *tmp;

	if (slot->state == NOT_CONFIGURED)
		return -EINVAL;

	list_for_each_entry_safe(dev, tmp, &slot->bus->devices, bus_list) {
		eeh_remove_bus_device(dev);
		pci_remove_bus_device(dev);
	}

	slot->state = NOT_CONFIGURED;
	return 0;
}

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

	down(&rpaphp_sem);
	retval = __disable_slot (slot);
	up(&rpaphp_sem);

	return retval;
}

struct hotplug_slot_ops rpaphp_hotplug_slot_ops = {
	.owner = THIS_MODULE,
	.enable_slot = enable_slot,
	.disable_slot = disable_slot,
	.set_attention_status = set_attention_status,
	.get_power_status = get_power_status,
	.get_attention_status = get_attention_status,
	.get_adapter_status = get_adapter_status,
	.get_max_bus_speed = get_max_bus_speed,
};

module_init(rpaphp_init);
module_exit(rpaphp_exit);

EXPORT_SYMBOL_GPL(rpaphp_add_slot);
EXPORT_SYMBOL_GPL(rpaphp_slot_head);
EXPORT_SYMBOL_GPL(rpaphp_get_drc_props);
Commit	Line	Data
1da177e4 LT	1	/*
	2	* PCI Hot Plug Controller Driver for RPA-compliant PPC64 platform.
	3	* Copyright (C) 2003 Linda Xie <lxie@us.ibm.com>
	4	*
	5	* All rights reserved.
	6	*
	7	* This program is free software; you can redistribute it and/or modify
	8	* it under the terms of the GNU General Public License as published by
	9	* the Free Software Foundation; either version 2 of the License, or (at
	10	* your option) any later version.
	11	*
	12	* This program is distributed in the hope that it will be useful, but
	13	* WITHOUT ANY WARRANTY; without even the implied warranty of
	14	* MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, GOOD TITLE or
	15	* NON INFRINGEMENT. See the GNU General Public License for more
	16	* details.
	17	*
	18	* You should have received a copy of the GNU General Public License
	19	* along with this program; if not, write to the Free Software
	20	* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
	21	*
	22	* Send feedback to <lxie@us.ibm.com>
	23	*
	24	*/
1da177e4 LT	25	#include <linux/kernel.h>
	26	#include <linux/module.h>
	27	#include <linux/moduleparam.h>
	28	#include <linux/pci.h>
7a54f25c	29	#include <linux/pci_hotplug.h>
1da177e4 LT	30	#include <linux/slab.h>
	31	#include <linux/smp.h>
	32	#include <linux/smp_lock.h>
	33	#include <linux/init.h>
	34	#include <asm/eeh.h> /* for eeh_add_device() */
	35	#include <asm/rtas.h> /* rtas_call */
	36	#include <asm/pci-bridge.h> /* for pci_controller */
	37	#include "../pci.h" /* for pci_add_new_bus */
	38	/* and pci_do_scan_bus */
	39	#include "rpaphp.h"
1da177e4 LT	40
	41	int debug;
	42	static struct semaphore rpaphp_sem;
	43	LIST_HEAD(rpaphp_slot_head);
	44	int num_slots;
	45
	46	#define DRIVER_VERSION "0.1"
	47	#define DRIVER_AUTHOR "Linda Xie <lxie@us.ibm.com>"
	48	#define DRIVER_DESC "RPA HOT Plug PCI Controller Driver"
	49
	50	#define MAX_LOC_CODE 128
	51
	52	MODULE_AUTHOR(DRIVER_AUTHOR);
	53	MODULE_DESCRIPTION(DRIVER_DESC);
	54	MODULE_LICENSE("GPL");
	55
	56	module_param(debug, bool, 0644);
	57
1da177e4 LT	58	static int rpaphp_get_attention_status(struct slot *slot)
	59	{
	60	return slot->hotplug_slot->info->attention_status;
	61	}
	62
	63	/**
	64	* set_attention_status - set attention LED
	65	* echo 0 > attention -- set LED OFF
	66	* echo 1 > attention -- set LED ON
	67	* echo 2 > attention -- set LED ID(identify, light is blinking)
	68	*
	69	*/
	70	static int set_attention_status(struct hotplug_slot *hotplug_slot, u8 value)
	71	{
	72	int retval = 0;
	73	struct slot slot = (struct slot )hotplug_slot->private;
	74
	75	down(&rpaphp_sem);
	76	switch (value) {
	77	case 0:
	78	retval = rpaphp_set_attention_status(slot, LED_OFF);
	79	hotplug_slot->info->attention_status = 0;
	80	break;
	81	case 1:
	82	default:
	83	retval = rpaphp_set_attention_status(slot, LED_ON);
	84	hotplug_slot->info->attention_status = 1;
	85	break;
	86	case 2:
	87	retval = rpaphp_set_attention_status(slot, LED_ID);
	88	hotplug_slot->info->attention_status = 2;
	89	break;
	90	}
	91	up(&rpaphp_sem);
	92	return retval;
	93	}
	94
	95	/**
	96	* get_power_status - get power status of a slot
	97	* @hotplug_slot: slot to get status
	98	* @value: pointer to store status
	99	*
	100	*
	101	*/
	102	static int get_power_status(struct hotplug_slot hotplug_slot, u8 value)
	103	{
	104	int retval;
	105	struct slot slot = (struct slot )hotplug_slot->private;
	106
	107	down(&rpaphp_sem);
	108	retval = rpaphp_get_power_status(slot, value);
	109	up(&rpaphp_sem);
	110	return retval;
	111	}
	112
	113	/**
	114	* get_attention_status - get attention LED status
	115	*
	116	*
	117	*/
	118	static int get_attention_status(struct hotplug_slot hotplug_slot, u8 value)
	119	{
	120	int retval = 0;
	121	struct slot slot = (struct slot )hotplug_slot->private;
122
123	down(&rpaphp_sem);
124	*value = rpaphp_get_attention_status(slot);
125	up(&rpaphp_sem);
126	return retval;
127	}
128
129	static int get_adapter_status(struct hotplug_slot hotplug_slot, u8 value)
130	{
131	struct slot slot = (struct slot )hotplug_slot->private;
132	int retval = 0;
133
134	down(&rpaphp_sem);
5eeb8c63	135	retval = rpaphp_get_pci_adapter_status(slot, 0, value);
1da177e4 LT	136	up(&rpaphp_sem);
	137	return retval;
	138	}
	139
	140	static int get_max_bus_speed(struct hotplug_slot hotplug_slot, enum pci_bus_speed value)
	141	{
	142	struct slot slot = (struct slot )hotplug_slot->private;
	143
	144	down(&rpaphp_sem);
	145	switch (slot->type) {
	146	case 1:
	147	case 2:
	148	case 3:
	149	case 4:
	150	case 5:
	151	case 6:
	152	value = PCI_SPEED_33MHz; / speed for case 1-6 */
	153	break;
	154	case 7:
	155	case 8:
	156	*value = PCI_SPEED_66MHz;
	157	break;
	158	case 11:
	159	case 14:
	160	*value = PCI_SPEED_66MHz_PCIX;
	161	break;
	162	case 12:
	163	case 15:
	164	*value = PCI_SPEED_100MHz_PCIX;
	165	break;
	166	case 13:
	167	case 16:
	168	*value = PCI_SPEED_133MHz_PCIX;
	169	break;
	170	default:
	171	*value = PCI_SPEED_UNKNOWN;
	172	break;
	173
	174	}
	175	up(&rpaphp_sem);
	176	return 0;
	177	}
	178
954a46e2 JK	179	static int get_children_props(struct device_node dn, const int *drc_indexes,
	180	const int drc_names, const int drc_types,
	181	const int **drc_power_domains)
1da177e4	182	{
954a46e2	183	const int indexes, names, types, domains;
1da177e4	184
40cd3a45 SR	185	indexes = of_get_property(dn, "ibm,drc-indexes", NULL);
	186	names = of_get_property(dn, "ibm,drc-names", NULL);
	187	types = of_get_property(dn, "ibm,drc-types", NULL);
	188	domains = of_get_property(dn, "ibm,drc-power-domains", NULL);
1da177e4 LT	189
	190	if (!indexes \|\| !names \|\| !types \|\| !domains) {
	191	/* Slot does not have dynamically-removable children */
	192	return -EINVAL;
	193	}
	194	if (drc_indexes)
	195	*drc_indexes = indexes;
	196	if (drc_names)
	197	/* &drc_names[1] contains NULL terminated slot names */
	198	*drc_names = names;
	199	if (drc_types)
	200	/* &drc_types[1] contains NULL terminated slot types */
	201	*drc_types = types;
	202	if (drc_power_domains)
	203	*drc_power_domains = domains;
	204
	205	return 0;
	206	}
	207
	208	/* To get the DRC props describing the current node, first obtain it's
	209	* my-drc-index property. Next obtain the DRC list from it's parent. Use
	210	* the my-drc-index for correlation, and obtain the requested properties.
	211	*/
	212	int rpaphp_get_drc_props(struct device_node dn, int drc_index,
	213	char drc_name, char drc_type, int *drc_power_domain)
	214	{
954a46e2 JK	215	const int indexes, names;
	216	const int types, domains;
	217	const unsigned int *my_index;
1da177e4 LT	218	char name_tmp, type_tmp;
	219	int i, rc;
	220
40cd3a45	221	my_index = of_get_property(dn, "ibm,my-drc-index", NULL);
1da177e4 LT	222	if (!my_index) {
	223	/* Node isn't DLPAR/hotplug capable */
	224	return -EINVAL;
	225	}
	226
	227	rc = get_children_props(dn->parent, &indexes, &names, &types, &domains);
	228	if (rc < 0) {
	229	return -EINVAL;
	230	}
	231
	232	name_tmp = (char *) &names[1];
	233	type_tmp = (char *) &types[1];
	234
	235	/* Iterate through parent properties, looking for my-drc-index */
	236	for (i = 0; i < indexes[0]; i++) {
	237	if ((unsigned int) indexes[i + 1] == *my_index) {
	238	if (drc_name)
	239	*drc_name = name_tmp;
	240	if (drc_type)
	241	*drc_type = type_tmp;
	242	if (drc_index)
	243	drc_index = my_index;
	244	if (drc_power_domain)
	245	*drc_power_domain = domains[i+1];
	246	return 0;
	247	}
	248	name_tmp += (strlen(name_tmp) + 1);
	249	type_tmp += (strlen(type_tmp) + 1);
	250	}
	251
	252	return -EINVAL;
	253	}
	254
	255	static int is_php_type(char *drc_type)
	256	{
	257	unsigned long value;
	258	char *endptr;
	259
	260	/* PCI Hotplug nodes have an integer for drc_type */
	261	value = simple_strtoul(drc_type, &endptr, 10);
	262	if (endptr == drc_type)
	263	return 0;
	264
	265	return 1;
	266	}
	267
954a46e2 JK	268	static int is_php_dn(struct device_node dn, const int *indexes,
954a46e2 JK	269	const int names, const int types, const int **power_domains)
1da177e4	270	{
954a46e2	271	const int *drc_types;
1da177e4 LT	272	int rc;
	273
	274	rc = get_children_props(dn, indexes, names, &drc_types, power_domains);
	275	if (rc >= 0) {
	276	if (is_php_type((char *) &drc_types[1])) {
	277	*types = drc_types;
	278	return 1;
	279	}
	280	}
	281
	282	return 0;
	283	}
	284
f6afbad8 LV	285	/**
	286	* rpaphp_add_slot -- add hotplug or dlpar slot
	287	*
1da177e4 LT	288	* rpaphp not only registers PCI hotplug slots(HOTPLUG),
	289	* but also logical DR slots(EMBEDDED).
	290	* HOTPLUG slot: An adapter can be physically added/removed.
	291	* EMBEDDED slot: An adapter can be logically removed/added
	292	* from/to a partition with the slot.
f6afbad8	293	*/
1da177e4 LT	294	int rpaphp_add_slot(struct device_node *dn)
	295	{
	296	struct slot *slot;
	297	int retval = 0;
56d8456b	298	int i;
954a46e2	299	const int indexes, names, types, power_domains;
1da177e4 LT	300	char name, type;
	301
	302	dbg("Entry %s: dn->full_name=%s\n", __FUNCTION__, dn->full_name);
	303
1da177e4 LT	304	/* register PCI devices */
1da177e4 LT	305	if (dn->name != 0 && strcmp(dn->name, "pci") == 0) {
56d8456b JR	306	if (!is_php_dn(dn, &indexes, &names, &types, &power_domains))
56d8456b JR	307	goto exit;
1da177e4 LT	308
	309	name = (char *) &names[1];
	310	type = (char *) &types[1];
	311	for (i = 0; i < indexes[0]; i++,
56d8456b JR	312	name += (strlen(name) + 1), type += (strlen(type) + 1)) {
	313
	314	if (!(slot = alloc_slot_struct(dn, indexes[i + 1], name,
	315	power_domains[i + 1]))) {
	316	retval = -ENOMEM;
	317	goto exit;
	318	}
	319	slot->type = simple_strtoul(type, NULL, 10);
1da177e4	320
56d8456b	321	dbg("Found drc-index:0x%x drc-name:%s drc-type:%s\n",
1da177e4 LT	322	indexes[i + 1], name, type);
1da177e4 LT	323
f6afbad8	324	retval = rpaphp_register_pci_slot(slot);
1da177e4 LT	325	}
	326	}
	327	exit:
	328	dbg("%s - Exit: num_slots=%d rc[%d]\n",
	329	__FUNCTION__, num_slots, retval);
	330	return retval;
	331	}
	332
1da177e4 LT	333	static void __exit cleanup_slots(void)
	334	{
	335	struct list_head tmp, n;
	336	struct slot *slot;
	337
	338	/*
	339	* Unregister all of our slots with the pci_hotplug subsystem,
	340	* and free up all memory that we had allocated.
	341	* memory will be freed in release_slot callback.
	342	*/
	343
	344	list_for_each_safe(tmp, n, &rpaphp_slot_head) {
	345	slot = list_entry(tmp, struct slot, rpaphp_slot_list);
	346	list_del(&slot->rpaphp_slot_list);
	347	pci_hp_deregister(slot->hotplug_slot);
	348	}
	349	return;
	350	}
	351
	352	static int __init rpaphp_init(void)
	353	{
5eeb8c63 JR	354	struct device_node *dn = NULL;
5eeb8c63 JR	355
1da177e4	356	info(DRIVER_DESC " version: " DRIVER_VERSION "\n");
5eeb8c63 JR	357	init_MUTEX(&rpaphp_sem);
5eeb8c63 JR	358
a57ed79e	359	while ((dn = of_find_node_by_name(dn, "pci")))
5eeb8c63 JR	360	rpaphp_add_slot(dn);
5eeb8c63 JR	361
5eeb8c63	362	return 0;
1da177e4 LT	363	}
	364
	365	static void __exit rpaphp_exit(void)
	366	{
	367	cleanup_slots();
	368	}
	369
e06b80b7	370	static int __enable_slot(struct slot *slot)
1da177e4	371	{
e06b80b7 LV	372	int state;
e06b80b7 LV	373	int retval;
1da177e4	374
e06b80b7 LV	375	if (slot->state == CONFIGURED)
	376	return 0;
	377
	378	retval = rpaphp_get_sensor_state(slot, &state);
	379	if (retval)
	380	return retval;
	381
	382	if (state == PRESENT) {
	383	pcibios_add_pci_devices(slot->bus);
	384	slot->state = CONFIGURED;
	385	} else if (state == EMPTY) {
	386	slot->state = EMPTY;
	387	} else {
	388	err("%s: slot[%s] is in invalid state\n", __FUNCTION__, slot->name);
	389	slot->state = NOT_VALID;
	390	return -EINVAL;
1da177e4	391	}
e06b80b7 LV	392	return 0;
	393	}
	394
	395	static int enable_slot(struct hotplug_slot *hotplug_slot)
	396	{
	397	int retval;
	398	struct slot slot = (struct slot )hotplug_slot->private;
1da177e4	399
1da177e4	400	down(&rpaphp_sem);
e06b80b7	401	retval = __enable_slot(slot);
1da177e4	402	up(&rpaphp_sem);
e06b80b7	403
1da177e4 LT	404	return retval;
	405	}
	406
8fe64399	407	static int __disable_slot(struct slot *slot)
1da177e4	408	{
8fe64399	409	struct pci_dev dev, tmp;
1da177e4	410
8fe64399 LV	411	if (slot->state == NOT_CONFIGURED)
8fe64399 LV	412	return -EINVAL;
1da177e4	413
8fe64399 LV	414	list_for_each_entry_safe(dev, tmp, &slot->bus->devices, bus_list) {
	415	eeh_remove_bus_device(dev);
	416	pci_remove_bus_device(dev);
1da177e4 LT	417	}
1da177e4 LT	418
8fe64399 LV	419	slot->state = NOT_CONFIGURED;
	420	return 0;
	421	}
	422
	423	static int disable_slot(struct hotplug_slot *hotplug_slot)
	424	{
	425	struct slot slot = (struct slot )hotplug_slot->private;
	426	int retval;
	427
1da177e4	428	down(&rpaphp_sem);
8fe64399	429	retval = __disable_slot (slot);
1da177e4	430	up(&rpaphp_sem);
8fe64399	431
1da177e4 LT	432	return retval;
	433	}
	434
b64a71ab LV	435	struct hotplug_slot_ops rpaphp_hotplug_slot_ops = {
	436	.owner = THIS_MODULE,
	437	.enable_slot = enable_slot,
	438	.disable_slot = disable_slot,
	439	.set_attention_status = set_attention_status,
	440	.get_power_status = get_power_status,
	441	.get_attention_status = get_attention_status,
	442	.get_adapter_status = get_adapter_status,
	443	.get_max_bus_speed = get_max_bus_speed,
	444	};
	445
1da177e4 LT	446	module_init(rpaphp_init);
	447	module_exit(rpaphp_exit);
	448
	449	EXPORT_SYMBOL_GPL(rpaphp_add_slot);
1da177e4 LT	450	EXPORT_SYMBOL_GPL(rpaphp_slot_head);
1da177e4 LT	451	EXPORT_SYMBOL_GPL(rpaphp_get_drc_props);