mirror of
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
synced 2024-08-21 08:19:28 +00:00
![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!
129 lines
3.4 KiB
C
129 lines
3.4 KiB
C
/*
|
|
* RPA Hot Plug 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 <asm/vio.h>
|
|
#include "rpaphp.h"
|
|
|
|
/*
|
|
* get_vio_adapter_status - get the status of a slot
|
|
*
|
|
* status:
|
|
*
|
|
* 1-- adapter is configured
|
|
* 2-- adapter is not configured
|
|
* 3-- not valid
|
|
*/
|
|
inline int rpaphp_get_vio_adapter_status(struct slot *slot, int is_init, u8 *value)
|
|
{
|
|
*value = slot->state;
|
|
return 0;
|
|
}
|
|
|
|
int rpaphp_unconfig_vio_adapter(struct slot *slot)
|
|
{
|
|
int retval = 0;
|
|
|
|
dbg("Entry %s: slot[%s]\n", __FUNCTION__, slot->name);
|
|
if (!slot->dev.vio_dev) {
|
|
info("%s: no VIOA in slot[%s]\n", __FUNCTION__, slot->name);
|
|
retval = -EINVAL;
|
|
goto exit;
|
|
}
|
|
/* remove the device from the vio core */
|
|
vio_unregister_device(slot->dev.vio_dev);
|
|
slot->state = NOT_CONFIGURED;
|
|
info("%s: adapter in slot[%s] unconfigured.\n", __FUNCTION__, slot->name);
|
|
exit:
|
|
dbg("Exit %s, rc=0x%x\n", __FUNCTION__, retval);
|
|
return retval;
|
|
}
|
|
|
|
static int setup_vio_hotplug_slot_info(struct slot *slot)
|
|
{
|
|
slot->hotplug_slot->info->power_status = 1;
|
|
rpaphp_get_vio_adapter_status(slot, 1,
|
|
&slot->hotplug_slot->info->adapter_status);
|
|
return 0;
|
|
}
|
|
|
|
int register_vio_slot(struct device_node *dn)
|
|
{
|
|
u32 *index;
|
|
char *name;
|
|
int rc = -EINVAL;
|
|
struct slot *slot = NULL;
|
|
|
|
rc = rpaphp_get_drc_props(dn, NULL, &name, NULL, NULL);
|
|
if (rc < 0)
|
|
goto exit_rc;
|
|
index = (u32 *) get_property(dn, "ibm,my-drc-index", NULL);
|
|
if (!index)
|
|
goto exit_rc;
|
|
if (!(slot = alloc_slot_struct(dn, *index, name, 0))) {
|
|
rc = -ENOMEM;
|
|
goto exit_rc;
|
|
}
|
|
slot->dev_type = VIO_DEV;
|
|
slot->dev.vio_dev = vio_find_node(dn);
|
|
if (slot->dev.vio_dev) {
|
|
/*
|
|
* rpaphp is the only owner of vio devices and
|
|
* does not need extra reference taken by
|
|
* vio_find_node
|
|
*/
|
|
put_device(&slot->dev.vio_dev->dev);
|
|
} else
|
|
slot->dev.vio_dev = vio_register_device_node(dn);
|
|
if (slot->dev.vio_dev)
|
|
slot->state = CONFIGURED;
|
|
else
|
|
slot->state = NOT_CONFIGURED;
|
|
if (setup_vio_hotplug_slot_info(slot))
|
|
goto exit_rc;
|
|
strcpy(slot->name, slot->dev.vio_dev->dev.bus_id);
|
|
info("%s: registered VIO device[name=%s vio_dev=%p]\n",
|
|
__FUNCTION__, slot->name, slot->dev.vio_dev);
|
|
rc = register_slot(slot);
|
|
exit_rc:
|
|
if (rc && slot)
|
|
dealloc_slot_struct(slot);
|
|
return (rc);
|
|
}
|
|
|
|
int rpaphp_enable_vio_slot(struct slot *slot)
|
|
{
|
|
int retval = 0;
|
|
|
|
if ((slot->dev.vio_dev = vio_register_device_node(slot->dn))) {
|
|
info("%s: VIO adapter %s in slot[%s] has been configured\n",
|
|
__FUNCTION__, slot->dn->name, slot->name);
|
|
slot->state = CONFIGURED;
|
|
} else {
|
|
info("%s: no vio_dev struct for adapter in slot[%s]\n",
|
|
__FUNCTION__, slot->name);
|
|
slot->state = NOT_CONFIGURED;
|
|
}
|
|
|
|
return retval;
|
|
}
|