![Linus Torvalds](/assets/img/avatar_default.png)
Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
268 lines
7.1 KiB
C
268 lines
7.1 KiB
C
/*
|
|
* 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 <asm/rtas.h>
|
|
#include "rpaphp.h"
|
|
|
|
static ssize_t removable_read_file (struct hotplug_slot *php_slot, char *buf)
|
|
{
|
|
u8 value;
|
|
int retval = -ENOENT;
|
|
struct slot *slot = (struct slot *)php_slot->private;
|
|
|
|
if (!slot)
|
|
return retval;
|
|
|
|
value = slot->removable;
|
|
retval = sprintf (buf, "%d\n", value);
|
|
return retval;
|
|
}
|
|
|
|
static struct hotplug_slot_attribute hotplug_slot_attr_removable = {
|
|
.attr = {.name = "phy_removable", .mode = S_IFREG | S_IRUGO},
|
|
.show = removable_read_file,
|
|
};
|
|
|
|
static void rpaphp_sysfs_add_attr_removable (struct hotplug_slot *slot)
|
|
{
|
|
sysfs_create_file(&slot->kobj, &hotplug_slot_attr_removable.attr);
|
|
}
|
|
|
|
static void rpaphp_sysfs_remove_attr_removable (struct hotplug_slot *slot)
|
|
{
|
|
sysfs_remove_file(&slot->kobj, &hotplug_slot_attr_removable.attr);
|
|
}
|
|
|
|
static ssize_t location_read_file (struct hotplug_slot *php_slot, char *buf)
|
|
{
|
|
char *value;
|
|
int retval = -ENOENT;
|
|
struct slot *slot = (struct slot *)php_slot->private;
|
|
|
|
if (!slot)
|
|
return retval;
|
|
|
|
value = slot->location;
|
|
retval = sprintf (buf, "%s\n", value);
|
|
return retval;
|
|
}
|
|
|
|
static struct hotplug_slot_attribute hotplug_slot_attr_location = {
|
|
.attr = {.name = "phy_location", .mode = S_IFREG | S_IRUGO},
|
|
.show = location_read_file,
|
|
};
|
|
|
|
static void rpaphp_sysfs_add_attr_location (struct hotplug_slot *slot)
|
|
{
|
|
sysfs_create_file(&slot->kobj, &hotplug_slot_attr_location.attr);
|
|
}
|
|
|
|
static void rpaphp_sysfs_remove_attr_location (struct hotplug_slot *slot)
|
|
{
|
|
sysfs_remove_file(&slot->kobj, &hotplug_slot_attr_location.attr);
|
|
}
|
|
|
|
/* 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);
|
|
return;
|
|
}
|
|
|
|
struct slot *alloc_slot_struct(struct device_node *dn, int drc_index, char *drc_name,
|
|
int power_domain)
|
|
{
|
|
struct slot *slot;
|
|
|
|
slot = kmalloc(sizeof (struct slot), GFP_KERNEL);
|
|
if (!slot)
|
|
goto error_nomem;
|
|
memset(slot, 0, sizeof (struct slot));
|
|
slot->hotplug_slot = kmalloc(sizeof (struct hotplug_slot), GFP_KERNEL);
|
|
if (!slot->hotplug_slot)
|
|
goto error_slot;
|
|
memset(slot->hotplug_slot, 0, sizeof (struct hotplug_slot));
|
|
slot->hotplug_slot->info = kmalloc(sizeof (struct hotplug_slot_info),
|
|
GFP_KERNEL);
|
|
if (!slot->hotplug_slot->info)
|
|
goto error_hpslot;
|
|
memset(slot->hotplug_slot->info, 0, sizeof (struct hotplug_slot_info));
|
|
slot->hotplug_slot->name = kmalloc(BUS_ID_SIZE + 1, GFP_KERNEL);
|
|
if (!slot->hotplug_slot->name)
|
|
goto error_info;
|
|
slot->location = kmalloc(strlen(drc_name) + 1, GFP_KERNEL);
|
|
if (!slot->location)
|
|
goto error_name;
|
|
slot->name = slot->hotplug_slot->name;
|
|
slot->dn = dn;
|
|
slot->index = drc_index;
|
|
strcpy(slot->location, drc_name);
|
|
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_name:
|
|
kfree(slot->hotplug_slot->name);
|
|
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 deregister_slot(struct slot *slot)
|
|
{
|
|
int retval = 0;
|
|
struct hotplug_slot *php_slot = slot->hotplug_slot;
|
|
|
|
dbg("%s - Entry: deregistering slot=%s\n",
|
|
__FUNCTION__, slot->name);
|
|
|
|
list_del(&slot->rpaphp_slot_list);
|
|
|
|
/* remove "phy_location" file */
|
|
rpaphp_sysfs_remove_attr_location(php_slot);
|
|
|
|
/* remove "phy_removable" file */
|
|
rpaphp_sysfs_remove_attr_removable(php_slot);
|
|
|
|
retval = pci_hp_deregister(php_slot);
|
|
if (retval)
|
|
err("Problem unregistering a slot %s\n", slot->name);
|
|
else
|
|
num_slots--;
|
|
|
|
dbg("%s - Exit: rc[%d]\n", __FUNCTION__, retval);
|
|
return retval;
|
|
}
|
|
|
|
int register_slot(struct slot *slot)
|
|
{
|
|
int retval;
|
|
|
|
dbg("%s registering slot:path[%s] index[%x], name[%s] pdomain[%x] type[%d]\n",
|
|
__FUNCTION__, 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)) { /* should't be here */
|
|
err("register_slot: slot[%s] is already registered\n", slot->name);
|
|
rpaphp_release_slot(slot->hotplug_slot);
|
|
return -EAGAIN;
|
|
}
|
|
retval = pci_hp_register(slot->hotplug_slot);
|
|
if (retval) {
|
|
err("pci_hp_register failed with error %d\n", retval);
|
|
rpaphp_release_slot(slot->hotplug_slot);
|
|
return retval;
|
|
}
|
|
|
|
/* create "phy_locatoin" file */
|
|
rpaphp_sysfs_add_attr_location(slot->hotplug_slot);
|
|
|
|
/* create "phy_removable" file */
|
|
rpaphp_sysfs_add_attr_removable(slot->hotplug_slot);
|
|
|
|
/* add slot to our internal list */
|
|
dbg("%s adding slot[%s] to rpaphp_slot_list\n",
|
|
__FUNCTION__, slot->name);
|
|
|
|
list_add(&slot->rpaphp_slot_list, &rpaphp_slot_head);
|
|
|
|
if (slot->dev_type == VIO_DEV)
|
|
info("Slot [%s](VIO location=%s) registered\n",
|
|
slot->name, slot->location);
|
|
else
|
|
info("Slot [%s](PCI location=%s) registered\n",
|
|
slot->name, slot->location);
|
|
num_slots++;
|
|
return 0;
|
|
}
|
|
|
|
int rpaphp_get_power_status(struct slot *slot, u8 * value)
|
|
{
|
|
int rc = 0, level;
|
|
|
|
if (slot->type == HOTPLUG) {
|
|
rc = rtas_get_power_level(slot->power_domain, &level);
|
|
if (!rc) {
|
|
dbg("%s the power level of slot %s(pwd-domain:0x%x) is %d\n",
|
|
__FUNCTION__, slot->name, slot->power_domain, level);
|
|
*value = level;
|
|
} else
|
|
err("failed to get power-level for slot(%s), rc=0x%x\n",
|
|
slot->location, rc);
|
|
} else {
|
|
dbg("%s report POWER_ON for EMBEDDED or PHB slot %s\n",
|
|
__FUNCTION__, slot->location);
|
|
*value = (u8) POWER_ON;
|
|
}
|
|
|
|
return rc;
|
|
}
|
|
|
|
int rpaphp_set_attention_status(struct slot *slot, u8 status)
|
|
{
|
|
int rc;
|
|
|
|
/* status: LED_OFF or LED_ON */
|
|
rc = rtas_set_indicator(DR_INDICATOR, slot->index, status);
|
|
if (rc < 0)
|
|
err("slot(name=%s location=%s index=0x%x) set attention-status(%d) failed! rc=0x%x\n",
|
|
slot->name, slot->location, slot->index, status, rc);
|
|
|
|
return rc;
|
|
}
|