You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
155 lines
4.1 KiB
155 lines
4.1 KiB
/*
|
|
* RPA Virtual I/O device functions
|
|
* Copyright (C) 2004 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/kobject.h>
|
|
#include <linux/sysfs.h>
|
|
#include <linux/pci.h>
|
|
#include <linux/string.h>
|
|
#include <linux/slab.h>
|
|
|
|
#include <asm/rtas.h>
|
|
#include "rpaphp.h"
|
|
|
|
/* free up the memory used by a slot */
|
|
static void rpaphp_release_slot(struct hotplug_slot *hotplug_slot)
|
|
{
|
|
struct slot *slot = (struct slot *) hotplug_slot->private;
|
|
dealloc_slot_struct(slot);
|
|
}
|
|
|
|
void dealloc_slot_struct(struct slot *slot)
|
|
{
|
|
kfree(slot->hotplug_slot->info);
|
|
kfree(slot->hotplug_slot->name);
|
|
kfree(slot->hotplug_slot);
|
|
kfree(slot);
|
|
}
|
|
|
|
struct slot *alloc_slot_struct(struct device_node *dn,
|
|
int drc_index, char *drc_name, int power_domain)
|
|
{
|
|
struct slot *slot;
|
|
|
|
slot = kzalloc(sizeof(struct slot), GFP_KERNEL);
|
|
if (!slot)
|
|
goto error_nomem;
|
|
slot->hotplug_slot = kzalloc(sizeof(struct hotplug_slot), GFP_KERNEL);
|
|
if (!slot->hotplug_slot)
|
|
goto error_slot;
|
|
slot->hotplug_slot->info = kzalloc(sizeof(struct hotplug_slot_info),
|
|
GFP_KERNEL);
|
|
if (!slot->hotplug_slot->info)
|
|
goto error_hpslot;
|
|
slot->hotplug_slot->name = kmalloc(strlen(drc_name) + 1, GFP_KERNEL);
|
|
if (!slot->hotplug_slot->name)
|
|
goto error_info;
|
|
slot->name = slot->hotplug_slot->name;
|
|
strcpy(slot->name, drc_name);
|
|
slot->dn = dn;
|
|
slot->index = drc_index;
|
|
slot->power_domain = power_domain;
|
|
slot->hotplug_slot->private = slot;
|
|
slot->hotplug_slot->ops = &rpaphp_hotplug_slot_ops;
|
|
slot->hotplug_slot->release = &rpaphp_release_slot;
|
|
|
|
return (slot);
|
|
|
|
error_info:
|
|
kfree(slot->hotplug_slot->info);
|
|
error_hpslot:
|
|
kfree(slot->hotplug_slot);
|
|
error_slot:
|
|
kfree(slot);
|
|
error_nomem:
|
|
return NULL;
|
|
}
|
|
|
|
static int is_registered(struct slot *slot)
|
|
{
|
|
struct slot *tmp_slot;
|
|
|
|
list_for_each_entry(tmp_slot, &rpaphp_slot_head, rpaphp_slot_list) {
|
|
if (!strcmp(tmp_slot->name, slot->name))
|
|
return 1;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
int rpaphp_deregister_slot(struct slot *slot)
|
|
{
|
|
int retval = 0;
|
|
struct hotplug_slot *php_slot = slot->hotplug_slot;
|
|
|
|
dbg("%s - Entry: deregistering slot=%s\n",
|
|
__func__, slot->name);
|
|
|
|
list_del(&slot->rpaphp_slot_list);
|
|
|
|
retval = pci_hp_deregister(php_slot);
|
|
if (retval)
|
|
err("Problem unregistering a slot %s\n", slot->name);
|
|
|
|
dbg("%s - Exit: rc[%d]\n", __func__, retval);
|
|
return retval;
|
|
}
|
|
EXPORT_SYMBOL_GPL(rpaphp_deregister_slot);
|
|
|
|
int rpaphp_register_slot(struct slot *slot)
|
|
{
|
|
struct hotplug_slot *php_slot = slot->hotplug_slot;
|
|
int retval;
|
|
int slotno;
|
|
|
|
dbg("%s registering slot:path[%s] index[%x], name[%s] pdomain[%x] type[%d]\n",
|
|
__func__, slot->dn->full_name, slot->index, slot->name,
|
|
slot->power_domain, slot->type);
|
|
|
|
/* should not try to register the same slot twice */
|
|
if (is_registered(slot)) {
|
|
err("rpaphp_register_slot: slot[%s] is already registered\n", slot->name);
|
|
return -EAGAIN;
|
|
}
|
|
|
|
if (slot->dn->child)
|
|
slotno = PCI_SLOT(PCI_DN(slot->dn->child)->devfn);
|
|
else
|
|
slotno = -1;
|
|
retval = pci_hp_register(php_slot, slot->bus, slotno);
|
|
if (retval) {
|
|
err("pci_hp_register failed with error %d\n", retval);
|
|
return retval;
|
|
}
|
|
|
|
/* add slot to our internal list */
|
|
list_add(&slot->rpaphp_slot_list, &rpaphp_slot_head);
|
|
info("Slot [%s] registered\n", slot->name);
|
|
return 0;
|
|
|
|
sysfs_fail:
|
|
pci_hp_deregister(php_slot);
|
|
return retval;
|
|
}
|
|
|
|
|