[linux-block.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);

#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, level;
	struct slot *slot = (struct slot *)hotplug_slot->private;

	down(&rpaphp_sem);
	retval = rtas_get_power_level (slot->power_domain, &level);
	if (!retval)
		*value = level;
	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 rc, state;

	down(&rpaphp_sem);
	rc = rpaphp_get_sensor_state(slot, &state);
	up(&rpaphp_sem);

	*value = NOT_VALID;
	if (rc)
		return rc;

	if (state == EMPTY)
		*value = EMPTY;
	else if (state == PRESENT)
		*value = slot->state;

	return 0;
}

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

	if (!dn->name || strcmp(dn->name, "pci"))
		return 0;

	if (!is_php_dn(dn, &indexes, &names, &types, &power_domains))
		return 0;

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

	/* register PCI devices */
	name = (char *) &names[1];
	type = (char *) &types[1];
	for (i = 0; i < indexes[0]; i++) {

		slot = alloc_slot_struct(dn, indexes[i + 1], name, power_domains[i + 1]);
		if (!slot)
			return -ENOMEM;

		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);
		if (retval)
			dealloc_slot_struct(slot);

		name += strlen(name) + 1;
		type += strlen(type) + 1;
	}
	dbg("%s - Exit: rc[%d]\n", __FUNCTION__, retval);

	/* XXX FIXME: reports a failure only if last entry in loop failed */
	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);
1da177e4 LT	44
	45	#define DRIVER_VERSION "0.1"
	46	#define DRIVER_AUTHOR "Linda Xie <lxie@us.ibm.com>"
	47	#define DRIVER_DESC "RPA HOT Plug PCI Controller Driver"
	48
	49	#define MAX_LOC_CODE 128
	50
	51	MODULE_AUTHOR(DRIVER_AUTHOR);
	52	MODULE_DESCRIPTION(DRIVER_DESC);
	53	MODULE_LICENSE("GPL");
	54
	55	module_param(debug, bool, 0644);
	56
1da177e4 LT	57	static int rpaphp_get_attention_status(struct slot *slot)
	58	{
	59	return slot->hotplug_slot->info->attention_status;
	60	}
	61
	62	/**
	63	* set_attention_status - set attention LED
	64	* echo 0 > attention -- set LED OFF
	65	* echo 1 > attention -- set LED ON
	66	* echo 2 > attention -- set LED ID(identify, light is blinking)
	67	*
	68	*/
	69	static int set_attention_status(struct hotplug_slot *hotplug_slot, u8 value)
	70	{
	71	int retval = 0;
	72	struct slot slot = (struct slot )hotplug_slot->private;
	73
	74	down(&rpaphp_sem);
	75	switch (value) {
	76	case 0:
	77	retval = rpaphp_set_attention_status(slot, LED_OFF);
	78	hotplug_slot->info->attention_status = 0;
	79	break;
	80	case 1:
	81	default:
	82	retval = rpaphp_set_attention_status(slot, LED_ON);
	83	hotplug_slot->info->attention_status = 1;
	84	break;
	85	case 2:
	86	retval = rpaphp_set_attention_status(slot, LED_ID);
	87	hotplug_slot->info->attention_status = 2;
	88	break;
	89	}
	90	up(&rpaphp_sem);
	91	return retval;
	92	}
	93
	94	/**
	95	* get_power_status - get power status of a slot
	96	* @hotplug_slot: slot to get status
	97	* @value: pointer to store status
	98	*
	99	*
	100	*/
	101	static int get_power_status(struct hotplug_slot hotplug_slot, u8 value)
	102	{
427310ff	103	int retval, level;
1da177e4 LT	104	struct slot slot = (struct slot )hotplug_slot->private;
	105
	106	down(&rpaphp_sem);
427310ff LV	107	retval = rtas_get_power_level (slot->power_domain, &level);
	108	if (!retval)
	109	*value = level;
1da177e4 LT	110	up(&rpaphp_sem);
	111	return retval;
	112	}
	113
	114	/**
	115	* get_attention_status - get attention LED status
	116	*
	117	*
	118	*/
	119	static int get_attention_status(struct hotplug_slot hotplug_slot, u8 value)
	120	{
	121	int retval = 0;
	122	struct slot slot = (struct slot )hotplug_slot->private;
	123
	124	down(&rpaphp_sem);
	125	*value = rpaphp_get_attention_status(slot);
	126	up(&rpaphp_sem);
	127	return retval;
	128	}
	129
	130	static int get_adapter_status(struct hotplug_slot hotplug_slot, u8 value)
	131	{
	132	struct slot slot = (struct slot )hotplug_slot->private;
bf0af511	133	int rc, state;
1da177e4 LT	134
1da177e4 LT	135	down(&rpaphp_sem);
bf0af511	136	rc = rpaphp_get_sensor_state(slot, &state);
1da177e4	137	up(&rpaphp_sem);
bf0af511 LV	138
	139	*value = NOT_VALID;
	140	if (rc)
	141	return rc;
	142
	143	if (state == EMPTY)
	144	*value = EMPTY;
	145	else if (state == PRESENT)
	146	*value = slot->state;
	147
	148	return 0;
1da177e4 LT	149	}
	150
	151	static int get_max_bus_speed(struct hotplug_slot hotplug_slot, enum pci_bus_speed value)
	152	{
	153	struct slot slot = (struct slot )hotplug_slot->private;
	154
	155	down(&rpaphp_sem);
	156	switch (slot->type) {
	157	case 1:
	158	case 2:
	159	case 3:
	160	case 4:
	161	case 5:
	162	case 6:
	163	value = PCI_SPEED_33MHz; / speed for case 1-6 */
	164	break;
	165	case 7:
	166	case 8:
	167	*value = PCI_SPEED_66MHz;
	168	break;
	169	case 11:
	170	case 14:
	171	*value = PCI_SPEED_66MHz_PCIX;
	172	break;
	173	case 12:
	174	case 15:
	175	*value = PCI_SPEED_100MHz_PCIX;
	176	break;
	177	case 13:
	178	case 16:
	179	*value = PCI_SPEED_133MHz_PCIX;
	180	break;
	181	default:
	182	*value = PCI_SPEED_UNKNOWN;
	183	break;
	184
	185	}
	186	up(&rpaphp_sem);
	187	return 0;
	188	}
	189
954a46e2 JK	190	static int get_children_props(struct device_node dn, const int *drc_indexes,
	191	const int drc_names, const int drc_types,
	192	const int **drc_power_domains)
1da177e4	193	{
954a46e2	194	const int indexes, names, types, domains;
1da177e4	195
954a46e2 JK	196	indexes = get_property(dn, "ibm,drc-indexes", NULL);
	197	names = get_property(dn, "ibm,drc-names", NULL);
	198	types = get_property(dn, "ibm,drc-types", NULL);
	199	domains = get_property(dn, "ibm,drc-power-domains", NULL);
1da177e4 LT	200
	201	if (!indexes \|\| !names \|\| !types \|\| !domains) {
	202	/* Slot does not have dynamically-removable children */
	203	return -EINVAL;
	204	}
	205	if (drc_indexes)
	206	*drc_indexes = indexes;
	207	if (drc_names)
	208	/* &drc_names[1] contains NULL terminated slot names */
	209	*drc_names = names;
	210	if (drc_types)
	211	/* &drc_types[1] contains NULL terminated slot types */
	212	*drc_types = types;
	213	if (drc_power_domains)
	214	*drc_power_domains = domains;
	215
	216	return 0;
	217	}
	218
	219	/* To get the DRC props describing the current node, first obtain it's
	220	* my-drc-index property. Next obtain the DRC list from it's parent. Use
	221	* the my-drc-index for correlation, and obtain the requested properties.
	222	*/
	223	int rpaphp_get_drc_props(struct device_node dn, int drc_index,
	224	char drc_name, char drc_type, int *drc_power_domain)
	225	{
954a46e2 JK	226	const int indexes, names;
	227	const int types, domains;
	228	const unsigned int *my_index;
1da177e4 LT	229	char name_tmp, type_tmp;
	230	int i, rc;
	231
954a46e2	232	my_index = get_property(dn, "ibm,my-drc-index", NULL);
1da177e4 LT	233	if (!my_index) {
	234	/* Node isn't DLPAR/hotplug capable */
	235	return -EINVAL;
	236	}
	237
	238	rc = get_children_props(dn->parent, &indexes, &names, &types, &domains);
	239	if (rc < 0) {
	240	return -EINVAL;
	241	}
	242
	243	name_tmp = (char *) &names[1];
	244	type_tmp = (char *) &types[1];
	245
	246	/* Iterate through parent properties, looking for my-drc-index */
	247	for (i = 0; i < indexes[0]; i++) {
	248	if ((unsigned int) indexes[i + 1] == *my_index) {
	249	if (drc_name)
	250	*drc_name = name_tmp;
	251	if (drc_type)
	252	*drc_type = type_tmp;
	253	if (drc_index)
	254	drc_index = my_index;
	255	if (drc_power_domain)
	256	*drc_power_domain = domains[i+1];
	257	return 0;
	258	}
	259	name_tmp += (strlen(name_tmp) + 1);
	260	type_tmp += (strlen(type_tmp) + 1);
	261	}
	262
	263	return -EINVAL;
	264	}
	265
	266	static int is_php_type(char *drc_type)
	267	{
	268	unsigned long value;
	269	char *endptr;
	270
	271	/* PCI Hotplug nodes have an integer for drc_type */
	272	value = simple_strtoul(drc_type, &endptr, 10);
	273	if (endptr == drc_type)
	274	return 0;
	275
	276	return 1;
	277	}
	278
954a46e2 JK	279	static int is_php_dn(struct device_node dn, const int *indexes,
954a46e2 JK	280	const int names, const int types, const int **power_domains)
1da177e4	281	{
954a46e2	282	const int *drc_types;
1da177e4 LT	283	int rc;
	284
	285	rc = get_children_props(dn, indexes, names, &drc_types, power_domains);
	286	if (rc >= 0) {
	287	if (is_php_type((char *) &drc_types[1])) {
	288	*types = drc_types;
	289	return 1;
	290	}
	291	}
	292
	293	return 0;
	294	}
	295
f6afbad8	296	/**
	297	* rpaphp_add_slot -- add hotplug or dlpar slot
	298	*
1da177e4 LT	299	* rpaphp not only registers PCI hotplug slots(HOTPLUG),
	300	* but also logical DR slots(EMBEDDED).
	301	* HOTPLUG slot: An adapter can be physically added/removed.
	302	* EMBEDDED slot: An adapter can be logically removed/added
	303	* from/to a partition with the slot.
f6afbad8	304	*/
1da177e4 LT	305	int rpaphp_add_slot(struct device_node *dn)
	306	{
	307	struct slot *slot;
	308	int retval = 0;
56d8456b	309	int i;
954a46e2	310	const int indexes, names, types, power_domains;
1da177e4 LT	311	char name, type;
1da177e4 LT	312
bf8cbae4 LV	313	if (!dn->name \|\| strcmp(dn->name, "pci"))
	314	return 0;
	315
	316	if (!is_php_dn(dn, &indexes, &names, &types, &power_domains))
	317	return 0;
	318
1da177e4 LT	319	dbg("Entry %s: dn->full_name=%s\n", __FUNCTION__, dn->full_name);
1da177e4 LT	320
1da177e4	321	/* register PCI devices */
bf8cbae4 LV	322	name = (char *) &names[1];
	323	type = (char *) &types[1];
	324	for (i = 0; i < indexes[0]; i++) {
	325
	326	slot = alloc_slot_struct(dn, indexes[i + 1], name, power_domains[i + 1]);
	327	if (!slot)
	328	return -ENOMEM;
	329
	330	slot->type = simple_strtoul(type, NULL, 10);
1da177e4	331
bf8cbae4 LV	332	dbg("Found drc-index:0x%x drc-name:%s drc-type:%s\n",
bf8cbae4 LV	333	indexes[i + 1], name, type);
1da177e4	334
bf8cbae4	335	retval = rpaphp_register_pci_slot(slot);
31be7586 LV	336	if (retval)
	337	dealloc_slot_struct(slot);
	338
bf8cbae4 LV	339	name += strlen(name) + 1;
bf8cbae4 LV	340	type += strlen(type) + 1;
1da177e4	341	}
fa189159	342	dbg("%s - Exit: rc[%d]\n", __FUNCTION__, retval);
31be7586 LV	343
31be7586 LV	344	/* XXX FIXME: reports a failure only if last entry in loop failed */
1da177e4 LT	345	return retval;
	346	}
	347
1da177e4 LT	348	static void __exit cleanup_slots(void)
	349	{
	350	struct list_head tmp, n;
	351	struct slot *slot;
	352
	353	/*
	354	* Unregister all of our slots with the pci_hotplug subsystem,
	355	* and free up all memory that we had allocated.
	356	* memory will be freed in release_slot callback.
	357	*/
	358
	359	list_for_each_safe(tmp, n, &rpaphp_slot_head) {
	360	slot = list_entry(tmp, struct slot, rpaphp_slot_list);
	361	list_del(&slot->rpaphp_slot_list);
	362	pci_hp_deregister(slot->hotplug_slot);
	363	}
	364	return;
	365	}
	366
	367	static int __init rpaphp_init(void)
	368	{
5eeb8c63 JR	369	struct device_node *dn = NULL;
5eeb8c63 JR	370
1da177e4	371	info(DRIVER_DESC " version: " DRIVER_VERSION "\n");
5eeb8c63 JR	372	init_MUTEX(&rpaphp_sem);
5eeb8c63 JR	373
a57ed79e	374	while ((dn = of_find_node_by_name(dn, "pci")))
5eeb8c63 JR	375	rpaphp_add_slot(dn);
5eeb8c63 JR	376
5eeb8c63	377	return 0;
1da177e4 LT	378	}
	379
	380	static void __exit rpaphp_exit(void)
	381	{
	382	cleanup_slots();
	383	}
	384
e06b80b7	385	static int __enable_slot(struct slot *slot)
1da177e4	386	{
e06b80b7	387	int state;
e06b80b7	388	int retval;
1da177e4	389
e06b80b7	390	if (slot->state == CONFIGURED)
	391	return 0;
	392
	393	retval = rpaphp_get_sensor_state(slot, &state);
	394	if (retval)
	395	return retval;
	396
	397	if (state == PRESENT) {
	398	pcibios_add_pci_devices(slot->bus);
	399	slot->state = CONFIGURED;
	400	} else if (state == EMPTY) {
	401	slot->state = EMPTY;
	402	} else {
	403	err("%s: slot[%s] is in invalid state\n", __FUNCTION__, slot->name);
	404	slot->state = NOT_VALID;
	405	return -EINVAL;
1da177e4	406	}
e06b80b7	407	return 0;
	408	}
	409
	410	static int enable_slot(struct hotplug_slot *hotplug_slot)
	411	{
	412	int retval;
	413	struct slot slot = (struct slot )hotplug_slot->private;
1da177e4	414
1da177e4	415	down(&rpaphp_sem);
e06b80b7	416	retval = __enable_slot(slot);
1da177e4	417	up(&rpaphp_sem);
e06b80b7	418
1da177e4 LT	419	return retval;
	420	}
	421
8fe64399	422	static int __disable_slot(struct slot *slot)
1da177e4	423	{
8fe64399	424	struct pci_dev dev, tmp;
1da177e4	425
8fe64399	426	if (slot->state == NOT_CONFIGURED)
8fe64399	427	return -EINVAL;
1da177e4	428
8fe64399	429	list_for_each_entry_safe(dev, tmp, &slot->bus->devices, bus_list) {
	430	eeh_remove_bus_device(dev);
	431	pci_remove_bus_device(dev);
1da177e4 LT	432	}
1da177e4 LT	433
8fe64399	434	slot->state = NOT_CONFIGURED;
	435	return 0;
	436	}
	437
	438	static int disable_slot(struct hotplug_slot *hotplug_slot)
	439	{
	440	struct slot slot = (struct slot )hotplug_slot->private;
	441	int retval;
	442
1da177e4	443	down(&rpaphp_sem);
8fe64399	444	retval = __disable_slot (slot);
1da177e4	445	up(&rpaphp_sem);
8fe64399	446
1da177e4 LT	447	return retval;
	448	}
	449
b64a71ab	450	struct hotplug_slot_ops rpaphp_hotplug_slot_ops = {
	451	.owner = THIS_MODULE,
	452	.enable_slot = enable_slot,
	453	.disable_slot = disable_slot,
	454	.set_attention_status = set_attention_status,
	455	.get_power_status = get_power_status,
	456	.get_attention_status = get_attention_status,
	457	.get_adapter_status = get_adapter_status,
	458	.get_max_bus_speed = get_max_bus_speed,
	459	};
	460
1da177e4 LT	461	module_init(rpaphp_init);
	462	module_exit(rpaphp_exit);
	463
	464	EXPORT_SYMBOL_GPL(rpaphp_add_slot);
1da177e4 LT	465	EXPORT_SYMBOL_GPL(rpaphp_slot_head);
1da177e4 LT	466	EXPORT_SYMBOL_GPL(rpaphp_get_drc_props);