[net-next-2.6.git] / drivers / pci / hotplug / rpadlpar_core.c

/*
 * Interface for Dynamic Logical Partitioning of I/O Slots on
 * RPA-compliant PPC64 platform.
 *
 * John Rose <johnrose@austin.ibm.com>
 * Linda Xie <lxie@us.ibm.com>
 *
 * October 2003
 *
 * Copyright (C) 2003 IBM.
 *
 *      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.
 */
#include <linux/init.h>
#include <linux/pci.h>
#include <linux/string.h>

#include <asm/pci-bridge.h>
#include <linux/mutex.h>
#include <asm/rtas.h>
#include <asm/vio.h>

#include "../pci.h"
#include "rpaphp.h"
#include "rpadlpar.h"

static DEFINE_MUTEX(rpadlpar_mutex);

#define DLPAR_MODULE_NAME "rpadlpar_io"

#define NODE_TYPE_VIO  1
#define NODE_TYPE_SLOT 2
#define NODE_TYPE_PHB  3

static struct device_node *find_vio_slot_node(char *drc_name)
{
	struct device_node *parent = of_find_node_by_name(NULL, "vdevice");
	struct device_node *dn = NULL;
	char *name;
	int rc;

	if (!parent)
		return NULL;

	while ((dn = of_get_next_child(parent, dn))) {
		rc = rpaphp_get_drc_props(dn, NULL, &name, NULL, NULL);
		if ((rc == 0) && (!strcmp(drc_name, name)))
			break;
	}

	return dn;
}

/* Find dlpar-capable pci node that contains the specified name and type */
static struct device_node *find_php_slot_pci_node(char *drc_name,
						  char *drc_type)
{
	struct device_node *np = NULL;
	char *name;
	char *type;
	int rc;

	while ((np = of_find_node_by_type(np, "pci"))) {
		rc = rpaphp_get_drc_props(np, NULL, &name, &type, NULL);
		if (rc == 0)
			if (!strcmp(drc_name, name) && !strcmp(drc_type, type))
				break;
	}

	return np;
}

static struct device_node *find_dlpar_node(char *drc_name, int *node_type)
{
	struct device_node *dn;

	dn = find_php_slot_pci_node(drc_name, "SLOT");
	if (dn) {
		*node_type = NODE_TYPE_SLOT;
		return dn;
	}

	dn = find_php_slot_pci_node(drc_name, "PHB");
	if (dn) {
		*node_type = NODE_TYPE_PHB;
		return dn;
	}

	dn = find_vio_slot_node(drc_name);
	if (dn) {
		*node_type = NODE_TYPE_VIO;
		return dn;
	}

	return NULL;
}

static struct slot *find_slot(struct device_node *dn)
{
	struct list_head *tmp, *n;
	struct slot *slot;

	list_for_each_safe(tmp, n, &rpaphp_slot_head) {
		slot = list_entry(tmp, struct slot, rpaphp_slot_list);
		if (slot->dn == dn)
			return slot;
	}

	return NULL;
}

static struct pci_dev *dlpar_find_new_dev(struct pci_bus *parent,
					struct device_node *dev_dn)
{
	struct pci_dev *tmp = NULL;
	struct device_node *child_dn;

	list_for_each_entry(tmp, &parent->devices, bus_list) {
		child_dn = pci_device_to_OF_node(tmp);
		if (child_dn == dev_dn)
			return tmp;
	}
	return NULL;
}

static void dlpar_pci_add_bus(struct device_node *dn)
{
	struct pci_dn *pdn = PCI_DN(dn);
	struct pci_controller *phb = pdn->phb;
	struct pci_dev *dev = NULL;

	eeh_add_device_tree_early(dn);

	/* Add EADS device to PHB bus, adding new entry to bus->devices */
	dev = of_create_pci_dev(dn, phb->bus, pdn->devfn);
	if (!dev) {
		printk(KERN_ERR "%s: failed to create pci dev for %s\n",
				__FUNCTION__, dn->full_name);
		return;
	}

	if (dev->hdr_type == PCI_HEADER_TYPE_BRIDGE ||
	    dev->hdr_type == PCI_HEADER_TYPE_CARDBUS)
		of_scan_pci_bridge(dn, dev);

	pcibios_fixup_new_pci_devices(dev->subordinate,0);

	/* Claim new bus resources */
	pcibios_claim_one_bus(dev->bus);

	/* ioremap() for child bus, which may or may not succeed */
	remap_bus_range(dev->subordinate);

	/* Add new devices to global lists.  Register in proc, sysfs. */
	pci_bus_add_devices(phb->bus);
}

static int dlpar_add_pci_slot(char *drc_name, struct device_node *dn)
{
	struct pci_dev *dev;
	struct pci_controller *phb;

	if (pcibios_find_pci_bus(dn))
		return -EINVAL;

	/* Add pci bus */
	dlpar_pci_add_bus(dn);

	/* Confirm new bridge dev was created */
	phb = PCI_DN(dn)->phb;
	dev = dlpar_find_new_dev(phb->bus, dn);

	if (!dev) {
		printk(KERN_ERR "%s: unable to add bus %s\n", __FUNCTION__,
			drc_name);
		return -EIO;
	}

	if (dev->hdr_type != PCI_HEADER_TYPE_BRIDGE) {
		printk(KERN_ERR "%s: unexpected header type %d, unable to add bus %s\n",
			__FUNCTION__, dev->hdr_type, drc_name);
		return -EIO;
	}

	/* Add hotplug slot */
	if (rpaphp_add_slot(dn)) {
		printk(KERN_ERR "%s: unable to add hotplug slot %s\n",
			__FUNCTION__, drc_name);
		return -EIO;
	}
	return 0;
}

static int dlpar_remove_root_bus(struct pci_controller *phb)
{
	struct pci_bus *phb_bus;
	int rc;

	phb_bus = phb->bus;
	if (!(list_empty(&phb_bus->children) &&
	      list_empty(&phb_bus->devices))) {
		return -EBUSY;
	}

	rc = pcibios_remove_root_bus(phb);
	if (rc)
		return -EIO;

	device_unregister(phb_bus->bridge);
	pci_remove_bus(phb_bus);

	return 0;
}

static int dlpar_remove_phb(char *drc_name, struct device_node *dn)
{
	struct slot *slot;
	struct pci_dn *pdn;
	int rc = 0;

	if (!pcibios_find_pci_bus(dn))
		return -EINVAL;

	slot = find_slot(dn);
	if (slot) {
		/* Remove hotplug slot */
		if (rpaphp_deregister_slot(slot)) {
			printk(KERN_ERR
				"%s: unable to remove hotplug slot %s\n",
				__FUNCTION__, drc_name);
			return -EIO;
		}
	}

	pdn = dn->data;
	BUG_ON(!pdn || !pdn->phb);
	rc = dlpar_remove_root_bus(pdn->phb);
	if (rc < 0)
		return rc;

	pdn->phb = NULL;

	return 0;
}

static int dlpar_add_phb(char *drc_name, struct device_node *dn)
{
	struct pci_controller *phb;

	if (PCI_DN(dn) && PCI_DN(dn)->phb) {
		/* PHB already exists */
		return -EINVAL;
	}

	phb = init_phb_dynamic(dn);
	if (!phb)
		return -EIO;

	if (rpaphp_add_slot(dn)) {
		printk(KERN_ERR "%s: unable to add hotplug slot %s\n",
			__FUNCTION__, drc_name);
		return -EIO;
	}
	return 0;
}

static int dlpar_add_vio_slot(char *drc_name, struct device_node *dn)
{
	if (vio_find_node(dn))
		return -EINVAL;

	if (!vio_register_device_node(dn)) {
		printk(KERN_ERR
			"%s: failed to register vio node %s\n",
			__FUNCTION__, drc_name);
		return -EIO;
	}
	return 0;
}

/**
 * dlpar_add_slot - DLPAR add an I/O Slot
 * @drc_name: drc-name of newly added slot
 *
 * Make the hotplug module and the kernel aware
 * of a newly added I/O Slot.
 * Return Codes -
 * 0			Success
 * -ENODEV		Not a valid drc_name
 * -EINVAL		Slot already added
 * -ERESTARTSYS		Signalled before obtaining lock
 * -EIO			Internal PCI Error
 */
int dlpar_add_slot(char *drc_name)
{
	struct device_node *dn = NULL;
	int node_type;
	int rc = -EIO;

	if (mutex_lock_interruptible(&rpadlpar_mutex))
		return -ERESTARTSYS;

	/* Find newly added node */
	dn = find_dlpar_node(drc_name, &node_type);
	if (!dn) {
		rc = -ENODEV;
		goto exit;
	}

	switch (node_type) {
		case NODE_TYPE_VIO:
			rc = dlpar_add_vio_slot(drc_name, dn);
			break;
		case NODE_TYPE_SLOT:
			rc = dlpar_add_pci_slot(drc_name, dn);
			break;
		case NODE_TYPE_PHB:
			rc = dlpar_add_phb(drc_name, dn);
			break;
	}

	printk(KERN_INFO "%s: slot %s added\n", DLPAR_MODULE_NAME, drc_name);
exit:
	mutex_unlock(&rpadlpar_mutex);
	return rc;
}

/**
 * dlpar_remove_vio_slot - DLPAR remove a virtual I/O Slot
 * @drc_name: drc-name of newly added slot
 *
 * Remove the kernel and hotplug representations
 * of an I/O Slot.
 * Return Codes:
 * 0			Success
 * -EINVAL		Vio dev doesn't exist
 */
static int dlpar_remove_vio_slot(char *drc_name, struct device_node *dn)
{
	struct vio_dev *vio_dev;

	vio_dev = vio_find_node(dn);
	if (!vio_dev)
		return -EINVAL;

	vio_unregister_device(vio_dev);
	return 0;
}

/**
 * dlpar_remove_slot - DLPAR remove a PCI I/O Slot
 * @drc_name: drc-name of newly added slot
 *
 * Remove the kernel and hotplug representations
 * of a PCI I/O Slot.
 * Return Codes:
 * 0			Success
 * -ENODEV		Not a valid drc_name
 * -EIO			Internal PCI Error
 */
int dlpar_remove_pci_slot(char *drc_name, struct device_node *dn)
{
	struct pci_bus *bus;
	struct slot *slot;

	bus = pcibios_find_pci_bus(dn);
	if (!bus)
		return -EINVAL;

	slot = find_slot(dn);
	if (slot) {
		/* Remove hotplug slot */
		if (rpaphp_deregister_slot(slot)) {
			printk(KERN_ERR
				"%s: unable to remove hotplug slot %s\n",
				__FUNCTION__, drc_name);
			return -EIO;
		}
	} else {
		struct pci_dev *dev, *tmp;
		list_for_each_entry_safe(dev, tmp, &bus->devices, bus_list) {
			eeh_remove_bus_device(dev);
			pci_remove_bus_device(dev);
		}
	}

	if (unmap_bus_range(bus)) {
		printk(KERN_ERR "%s: failed to unmap bus range\n",
			__FUNCTION__);
		return -ERANGE;
	}

	BUG_ON(!bus->self);
	pci_remove_bus_device(bus->self);
	return 0;
}

/**
 * dlpar_remove_slot - DLPAR remove an I/O Slot
 * @drc_name: drc-name of newly added slot
 *
 * Remove the kernel and hotplug representations
 * of an I/O Slot.
 * Return Codes:
 * 0			Success
 * -ENODEV		Not a valid drc_name
 * -EINVAL		Slot already removed
 * -ERESTARTSYS		Signalled before obtaining lock
 * -EIO			Internal Error
 */
int dlpar_remove_slot(char *drc_name)
{
	struct device_node *dn;
	int node_type;
	int rc = 0;

	if (mutex_lock_interruptible(&rpadlpar_mutex))
		return -ERESTARTSYS;

	dn = find_dlpar_node(drc_name, &node_type);
	if (!dn) {
		rc = -ENODEV;
		goto exit;
	}

	switch (node_type) {
		case NODE_TYPE_VIO:
			rc = dlpar_remove_vio_slot(drc_name, dn);
			break;
		case NODE_TYPE_PHB:
			rc = dlpar_remove_phb(drc_name, dn);
			break;
		case NODE_TYPE_SLOT:
			rc = dlpar_remove_pci_slot(drc_name, dn);
			break;
	}
	printk(KERN_INFO "%s: slot %s removed\n", DLPAR_MODULE_NAME, drc_name);
exit:
	mutex_unlock(&rpadlpar_mutex);
	return rc;
}

static inline int is_dlpar_capable(void)
{
	int rc = rtas_token("ibm,configure-connector");

	return (int) (rc != RTAS_UNKNOWN_SERVICE);
}

int __init rpadlpar_io_init(void)
{
	int rc = 0;

	if (!is_dlpar_capable()) {
		printk(KERN_WARNING "%s: partition not DLPAR capable\n",
			__FUNCTION__);
		return -EPERM;
	}

	rc = dlpar_sysfs_init();
	return rc;
}

void rpadlpar_io_exit(void)
{
	dlpar_sysfs_exit();
	return;
}

module_init(rpadlpar_io_init);
module_exit(rpadlpar_io_exit);
MODULE_LICENSE("GPL");
Commit	Line	Data
1da177e4 LT	1	/*
	2	* Interface for Dynamic Logical Partitioning of I/O Slots on
	3	* RPA-compliant PPC64 platform.
	4	*
	5	* John Rose <johnrose@austin.ibm.com>
	6	* Linda Xie <lxie@us.ibm.com>
	7	*
	8	* October 2003
	9	*
	10	* Copyright (C) 2003 IBM.
	11	*
	12	* This program is free software; you can redistribute it and/or
	13	* modify it under the terms of the GNU General Public License
	14	* as published by the Free Software Foundation; either version
	15	* 2 of the License, or (at your option) any later version.
	16	*/
	17	#include <linux/init.h>
	18	#include <linux/pci.h>
4e57b681 TS	19	#include <linux/string.h>
4e57b681 TS	20
1da177e4	21	#include <asm/pci-bridge.h>
14cc3e2b	22	#include <linux/mutex.h>
1da177e4	23	#include <asm/rtas.h>
5eeb8c63	24	#include <asm/vio.h>
4e57b681	25
1da177e4 LT	26	#include "../pci.h"
	27	#include "rpaphp.h"
	28	#include "rpadlpar.h"
	29
14cc3e2b	30	static DEFINE_MUTEX(rpadlpar_mutex);
1da177e4	31
56d8456b JR	32	#define DLPAR_MODULE_NAME "rpadlpar_io"
56d8456b JR	33
1da177e4 LT	34	#define NODE_TYPE_VIO 1
	35	#define NODE_TYPE_SLOT 2
	36	#define NODE_TYPE_PHB 3
	37
5eeb8c63	38	static struct device_node find_vio_slot_node(char drc_name)
1da177e4	39	{
1da177e4	40	struct device_node *parent = of_find_node_by_name(NULL, "vdevice");
5eeb8c63 JR	41	struct device_node *dn = NULL;
	42	char *name;
	43	int rc;
1da177e4 LT	44
	45	if (!parent)
	46	return NULL;
	47
5eeb8c63 JR	48	while ((dn = of_get_next_child(parent, dn))) {
	49	rc = rpaphp_get_drc_props(dn, NULL, &name, NULL, NULL);
	50	if ((rc == 0) && (!strcmp(drc_name, name)))
	51	break;
1da177e4 LT	52	}
1da177e4 LT	53
5eeb8c63	54	return dn;
1da177e4 LT	55	}
	56
	57	/* Find dlpar-capable pci node that contains the specified name and type */
	58	static struct device_node find_php_slot_pci_node(char drc_name,
	59	char *drc_type)
	60	{
	61	struct device_node *np = NULL;
	62	char *name;
	63	char *type;
	64	int rc;
	65
	66	while ((np = of_find_node_by_type(np, "pci"))) {
	67	rc = rpaphp_get_drc_props(np, NULL, &name, &type, NULL);
	68	if (rc == 0)
	69	if (!strcmp(drc_name, name) && !strcmp(drc_type, type))
	70	break;
	71	}
	72
	73	return np;
	74	}
	75
5eeb8c63	76	static struct device_node find_dlpar_node(char drc_name, int *node_type)
1da177e4 LT	77	{
	78	struct device_node *dn;
	79
	80	dn = find_php_slot_pci_node(drc_name, "SLOT");
	81	if (dn) {
	82	*node_type = NODE_TYPE_SLOT;
	83	return dn;
	84	}
	85
	86	dn = find_php_slot_pci_node(drc_name, "PHB");
	87	if (dn) {
	88	*node_type = NODE_TYPE_PHB;
	89	return dn;
	90	}
	91
5eeb8c63	92	dn = find_vio_slot_node(drc_name);
1da177e4 LT	93	if (dn) {
	94	*node_type = NODE_TYPE_VIO;
	95	return dn;
	96	}
	97
	98	return NULL;
	99	}
	100
56d8456b	101	static struct slot find_slot(struct device_node dn)
1da177e4 LT	102	{
	103	struct list_head tmp, n;
	104	struct slot *slot;
	105
8737d6a9 LV	106	list_for_each_safe(tmp, n, &rpaphp_slot_head) {
	107	slot = list_entry(tmp, struct slot, rpaphp_slot_list);
	108	if (slot->dn == dn)
	109	return slot;
	110	}
1da177e4	111
8737d6a9	112	return NULL;
1da177e4 LT	113	}
1da177e4 LT	114
0945cd5f JR	115	static struct pci_dev dlpar_find_new_dev(struct pci_bus parent,
	116	struct device_node *dev_dn)
	117	{
	118	struct pci_dev *tmp = NULL;
	119	struct device_node *child_dn;
	120
	121	list_for_each_entry(tmp, &parent->devices, bus_list) {
	122	child_dn = pci_device_to_OF_node(tmp);
	123	if (child_dn == dev_dn)
	124	return tmp;
	125	}
	126	return NULL;
	127	}
	128
8737d6a9	129	static void dlpar_pci_add_bus(struct device_node *dn)
1da177e4	130	{
8737d6a9	131	struct pci_dn *pdn = PCI_DN(dn);
5fa80fcd	132	struct pci_controller *phb = pdn->phb;
1da177e4 LT	133	struct pci_dev *dev = NULL;
1da177e4 LT	134
d681db4a LV	135	eeh_add_device_tree_early(dn);
d681db4a LV	136
5fa80fcd JR	137	/* Add EADS device to PHB bus, adding new entry to bus->devices */
	138	dev = of_create_pci_dev(dn, phb->bus, pdn->devfn);
	139	if (!dev) {
	140	printk(KERN_ERR "%s: failed to create pci dev for %s\n",
	141	__FUNCTION__, dn->full_name);
8737d6a9	142	return;
1da177e4 LT	143	}
1da177e4 LT	144
5fa80fcd JR	145	if (dev->hdr_type == PCI_HEADER_TYPE_BRIDGE \|\|
	146	dev->hdr_type == PCI_HEADER_TYPE_CARDBUS)
	147	of_scan_pci_bridge(dn, dev);
	148
eca845c7	149	pcibios_fixup_new_pci_devices(dev->subordinate,0);
5fa80fcd JR	150
5fa80fcd JR	151	/* Claim new bus resources */
cd5b50be	152	pcibios_claim_one_bus(dev->bus);
5fa80fcd JR	153
5fa80fcd JR	154	/* ioremap() for child bus, which may or may not succeed */
3c0c6441	155	remap_bus_range(dev->subordinate);
5fa80fcd	156
1da177e4	157	/* Add new devices to global lists. Register in proc, sysfs. */
5fa80fcd	158	pci_bus_add_devices(phb->bus);
1da177e4 LT	159	}
1da177e4 LT	160
940903c5	161	static int dlpar_add_pci_slot(char drc_name, struct device_node dn)
1da177e4 LT	162	{
1da177e4 LT	163	struct pci_dev *dev;
8737d6a9	164	struct pci_controller *phb;
1da177e4	165
01657868	166	if (pcibios_find_pci_bus(dn))
56d8456b JR	167	return -EINVAL;
56d8456b JR	168
1da177e4	169	/* Add pci bus */
8737d6a9 LV	170	dlpar_pci_add_bus(dn);
	171
	172	/* Confirm new bridge dev was created */
	173	phb = PCI_DN(dn)->phb;
	174	dev = dlpar_find_new_dev(phb->bus, dn);
	175
1da177e4 LT	176	if (!dev) {
	177	printk(KERN_ERR "%s: unable to add bus %s\n", __FUNCTION__,
	178	drc_name);
	179	return -EIO;
	180	}
	181
8737d6a9 LV	182	if (dev->hdr_type != PCI_HEADER_TYPE_BRIDGE) {
	183	printk(KERN_ERR "%s: unexpected header type %d, unable to add bus %s\n",
	184	__FUNCTION__, dev->hdr_type, drc_name);
	185	return -EIO;
	186	}
	187
5eeb8c63 JR	188	/* Add hotplug slot */
	189	if (rpaphp_add_slot(dn)) {
	190	printk(KERN_ERR "%s: unable to add hotplug slot %s\n",
	191	__FUNCTION__, drc_name);
	192	return -EIO;
	193	}
1da177e4 LT	194	return 0;
	195	}
	196
	197	static int dlpar_remove_root_bus(struct pci_controller *phb)
	198	{
	199	struct pci_bus *phb_bus;
	200	int rc;
	201
	202	phb_bus = phb->bus;
	203	if (!(list_empty(&phb_bus->children) &&
	204	list_empty(&phb_bus->devices))) {
	205	return -EBUSY;
	206	}
	207
	208	rc = pcibios_remove_root_bus(phb);
	209	if (rc)
	210	return -EIO;
	211
	212	device_unregister(phb_bus->bridge);
	213	pci_remove_bus(phb_bus);
	214
	215	return 0;
	216	}
	217
56d8456b	218	static int dlpar_remove_phb(char drc_name, struct device_node dn)
1da177e4	219	{
56d8456b	220	struct slot *slot;
1635317f	221	struct pci_dn *pdn;
1da177e4 LT	222	int rc = 0;
1da177e4 LT	223
01657868	224	if (!pcibios_find_pci_bus(dn))
56d8456b	225	return -EINVAL;
1da177e4	226
56d8456b JR	227	slot = find_slot(dn);
	228	if (slot) {
	229	/* Remove hotplug slot */
f6afbad8	230	if (rpaphp_deregister_slot(slot)) {
56d8456b JR	231	printk(KERN_ERR
	232	"%s: unable to remove hotplug slot %s\n",
	233	__FUNCTION__, drc_name);
	234	return -EIO;
	235	}
1da177e4 LT	236	}
1da177e4 LT	237
1635317f PM	238	pdn = dn->data;
	239	BUG_ON(!pdn \|\| !pdn->phb);
	240	rc = dlpar_remove_root_bus(pdn->phb);
1da177e4 LT	241	if (rc < 0)
	242	return rc;
	243
1635317f	244	pdn->phb = NULL;
56d8456b	245
1da177e4 LT	246	return 0;
	247	}
	248
5eeb8c63	249	static int dlpar_add_phb(char drc_name, struct device_node dn)
1da177e4 LT	250	{
	251	struct pci_controller *phb;
	252
fe98aeab	253	if (PCI_DN(dn) && PCI_DN(dn)->phb) {
56d8456b JR	254	/* PHB already exists */
	255	return -EINVAL;
	256	}
	257
1da177e4 LT	258	phb = init_phb_dynamic(dn);
1da177e4 LT	259	if (!phb)
56d8456b	260	return -EIO;
1da177e4	261
5eeb8c63 JR	262	if (rpaphp_add_slot(dn)) {
	263	printk(KERN_ERR "%s: unable to add hotplug slot %s\n",
	264	__FUNCTION__, drc_name);
	265	return -EIO;
	266	}
1da177e4 LT	267	return 0;
	268	}
	269
56d8456b JR	270	static int dlpar_add_vio_slot(char drc_name, struct device_node dn)
	271	{
	272	if (vio_find_node(dn))
	273	return -EINVAL;
	274
	275	if (!vio_register_device_node(dn)) {
	276	printk(KERN_ERR
	277	"%s: failed to register vio node %s\n",
	278	__FUNCTION__, drc_name);
	279	return -EIO;
	280	}
	281	return 0;
	282	}
	283
1da177e4 LT	284	/**
	285	* dlpar_add_slot - DLPAR add an I/O Slot
	286	* @drc_name: drc-name of newly added slot
	287	*
	288	* Make the hotplug module and the kernel aware
	289	* of a newly added I/O Slot.
	290	* Return Codes -
	291	* 0 Success
	292	* -ENODEV Not a valid drc_name
	293	* -EINVAL Slot already added
	294	* -ERESTARTSYS Signalled before obtaining lock
	295	* -EIO Internal PCI Error
	296	*/
	297	int dlpar_add_slot(char *drc_name)
	298	{
	299	struct device_node *dn = NULL;
	300	int node_type;
56d8456b	301	int rc = -EIO;
1da177e4	302
14cc3e2b	303	if (mutex_lock_interruptible(&rpadlpar_mutex))
1da177e4 LT	304	return -ERESTARTSYS;
1da177e4 LT	305
5eeb8c63 JR	306	/* Find newly added node */
5eeb8c63 JR	307	dn = find_dlpar_node(drc_name, &node_type);
1da177e4 LT	308	if (!dn) {
	309	rc = -ENODEV;
	310	goto exit;
	311	}
	312
	313	switch (node_type) {
	314	case NODE_TYPE_VIO:
56d8456b	315	rc = dlpar_add_vio_slot(drc_name, dn);
1da177e4 LT	316	break;
	317	case NODE_TYPE_SLOT:
	318	rc = dlpar_add_pci_slot(drc_name, dn);
	319	break;
	320	case NODE_TYPE_PHB:
5eeb8c63	321	rc = dlpar_add_phb(drc_name, dn);
1da177e4	322	break;
1da177e4 LT	323	}
1da177e4 LT	324
56d8456b	325	printk(KERN_INFO "%s: slot %s added\n", DLPAR_MODULE_NAME, drc_name);
1da177e4	326	exit:
14cc3e2b	327	mutex_unlock(&rpadlpar_mutex);
1da177e4 LT	328	return rc;
	329	}
	330
	331	/**
	332	* dlpar_remove_vio_slot - DLPAR remove a virtual I/O Slot
	333	* @drc_name: drc-name of newly added slot
	334	*
	335	* Remove the kernel and hotplug representations
	336	* of an I/O Slot.
	337	* Return Codes:
	338	* 0 Success
56d8456b	339	* -EINVAL Vio dev doesn't exist
1da177e4	340	*/
56d8456b	341	static int dlpar_remove_vio_slot(char drc_name, struct device_node dn)
1da177e4	342	{
5eeb8c63	343	struct vio_dev *vio_dev;
1da177e4	344
5eeb8c63	345	vio_dev = vio_find_node(dn);
56d8456b JR	346	if (!vio_dev)
56d8456b JR	347	return -EINVAL;
5eeb8c63 JR	348
5eeb8c63 JR	349	vio_unregister_device(vio_dev);
1da177e4 LT	350	return 0;
	351	}
	352
	353	/**
	354	* dlpar_remove_slot - DLPAR remove a PCI I/O Slot
	355	* @drc_name: drc-name of newly added slot
	356	*
	357	* Remove the kernel and hotplug representations
	358	* of a PCI I/O Slot.
	359	* Return Codes:
	360	* 0 Success
	361	* -ENODEV Not a valid drc_name
	362	* -EIO Internal PCI Error
	363	*/
56d8456b	364	int dlpar_remove_pci_slot(char drc_name, struct device_node dn)
1da177e4	365	{
56d8456b JR	366	struct pci_bus *bus;
56d8456b JR	367	struct slot *slot;
1da177e4	368
01657868	369	bus = pcibios_find_pci_bus(dn);
56d8456b JR	370	if (!bus)
	371	return -EINVAL;
	372
	373	slot = find_slot(dn);
	374	if (slot) {
	375	/* Remove hotplug slot */
f6afbad8	376	if (rpaphp_deregister_slot(slot)) {
56d8456b JR	377	printk(KERN_ERR
	378	"%s: unable to remove hotplug slot %s\n",
	379	__FUNCTION__, drc_name);
	380	return -EIO;
	381	}
5fa80fcd	382	} else {
8fe64399 LV	383	struct pci_dev dev, tmp;
	384	list_for_each_entry_safe(dev, tmp, &bus->devices, bus_list) {
	385	eeh_remove_bus_device(dev);
	386	pci_remove_bus_device(dev);
	387	}
1da177e4 LT	388	}
1da177e4 LT	389
9c209c91 JR	390	if (unmap_bus_range(bus)) {
	391	printk(KERN_ERR "%s: failed to unmap bus range\n",
	392	__FUNCTION__);
	393	return -ERANGE;
1da177e4	394	}
9c209c91 JR	395
	396	BUG_ON(!bus->self);
	397	pci_remove_bus_device(bus->self);
1da177e4 LT	398	return 0;
	399	}
	400
	401	/**
	402	* dlpar_remove_slot - DLPAR remove an I/O Slot
	403	* @drc_name: drc-name of newly added slot
	404	*
	405	* Remove the kernel and hotplug representations
	406	* of an I/O Slot.
	407	* Return Codes:
	408	* 0 Success
	409	* -ENODEV Not a valid drc_name
	410	* -EINVAL Slot already removed
	411	* -ERESTARTSYS Signalled before obtaining lock
	412	* -EIO Internal Error
	413	*/
	414	int dlpar_remove_slot(char *drc_name)
	415	{
5eeb8c63	416	struct device_node *dn;
5eeb8c63	417	int node_type;
1da177e4 LT	418	int rc = 0;
1da177e4 LT	419
14cc3e2b	420	if (mutex_lock_interruptible(&rpadlpar_mutex))
1da177e4 LT	421	return -ERESTARTSYS;
1da177e4 LT	422
5eeb8c63 JR	423	dn = find_dlpar_node(drc_name, &node_type);
5eeb8c63 JR	424	if (!dn) {
1da177e4 LT	425	rc = -ENODEV;
	426	goto exit;
	427	}
	428
56d8456b JR	429	switch (node_type) {
	430	case NODE_TYPE_VIO:
	431	rc = dlpar_remove_vio_slot(drc_name, dn);
	432	break;
	433	case NODE_TYPE_PHB:
	434	rc = dlpar_remove_phb(drc_name, dn);
	435	break;
	436	case NODE_TYPE_SLOT:
	437	rc = dlpar_remove_pci_slot(drc_name, dn);
	438	break;
1da177e4	439	}
56d8456b	440	printk(KERN_INFO "%s: slot %s removed\n", DLPAR_MODULE_NAME, drc_name);
1da177e4	441	exit:
14cc3e2b	442	mutex_unlock(&rpadlpar_mutex);
1da177e4 LT	443	return rc;
	444	}
	445
	446	static inline int is_dlpar_capable(void)
	447	{
	448	int rc = rtas_token("ibm,configure-connector");
	449
	450	return (int) (rc != RTAS_UNKNOWN_SERVICE);
	451	}
	452
	453	int __init rpadlpar_io_init(void)
	454	{
	455	int rc = 0;
	456
	457	if (!is_dlpar_capable()) {
	458	printk(KERN_WARNING "%s: partition not DLPAR capable\n",
	459	__FUNCTION__);
	460	return -EPERM;
	461	}
	462
	463	rc = dlpar_sysfs_init();
	464	return rc;
	465	}
	466
	467	void rpadlpar_io_exit(void)
	468	{
	469	dlpar_sysfs_exit();
	470	return;
	471	}
	472
	473	module_init(rpadlpar_io_init);
	474	module_exit(rpadlpar_io_exit);
	475	MODULE_LICENSE("GPL");