130 lines
3.4 KiB
C
130 lines
3.4 KiB
C
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/*
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* RPA Hot Plug Virtual I/O device functions
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* Copyright (C) 2004 Linda Xie <lxie@us.ibm.com>
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*
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* All rights reserved.
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or (at
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* your option) any later version.
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*
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* This program is distributed in the hope that it will be useful, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, GOOD TITLE or
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* NON INFRINGEMENT. See the GNU General Public License for more
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* details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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*
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* Send feedback to <lxie@us.ibm.com>
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*
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*/
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#include <asm/vio.h>
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#include "rpaphp.h"
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/*
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* get_vio_adapter_status - get the status of a slot
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*
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* status:
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*
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* 1-- adapter is configured
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* 2-- adapter is not configured
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* 3-- not valid
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*/
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inline int rpaphp_get_vio_adapter_status(struct slot *slot, int is_init, u8 *value)
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{
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*value = slot->state;
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return 0;
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}
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int rpaphp_unconfig_vio_adapter(struct slot *slot)
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{
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int retval = 0;
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dbg("Entry %s: slot[%s]\n", __FUNCTION__, slot->name);
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if (!slot->dev.vio_dev) {
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info("%s: no VIOA in slot[%s]\n", __FUNCTION__, slot->name);
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retval = -EINVAL;
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goto exit;
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}
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/* remove the device from the vio core */
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vio_unregister_device(slot->dev.vio_dev);
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slot->state = NOT_CONFIGURED;
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info("%s: adapter in slot[%s] unconfigured.\n", __FUNCTION__, slot->name);
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exit:
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dbg("Exit %s, rc=0x%x\n", __FUNCTION__, retval);
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return retval;
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}
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static int setup_vio_hotplug_slot_info(struct slot *slot)
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{
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slot->hotplug_slot->info->power_status = 1;
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rpaphp_get_vio_adapter_status(slot, 1,
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&slot->hotplug_slot->info->adapter_status);
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return 0;
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}
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int register_vio_slot(struct device_node *dn)
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{
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u32 *index;
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char *name;
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int rc = -EINVAL;
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struct slot *slot = NULL;
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rc = rpaphp_get_drc_props(dn, NULL, &name, NULL, NULL);
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if (rc < 0)
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goto exit_rc;
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index = (u32 *) get_property(dn, "ibm,my-drc-index", NULL);
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if (!index)
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goto exit_rc;
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if (!(slot = alloc_slot_struct(dn, *index, name, 0))) {
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rc = -ENOMEM;
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goto exit_rc;
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}
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slot->dev_type = VIO_DEV;
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slot->dev.vio_dev = vio_find_node(dn);
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if (slot->dev.vio_dev) {
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/*
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* rpaphp is the only owner of vio devices and
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* does not need extra reference taken by
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* vio_find_node
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*/
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put_device(&slot->dev.vio_dev->dev);
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} else
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slot->dev.vio_dev = vio_register_device_node(dn);
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if (slot->dev.vio_dev)
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slot->state = CONFIGURED;
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else
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slot->state = NOT_CONFIGURED;
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if (setup_vio_hotplug_slot_info(slot))
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goto exit_rc;
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strcpy(slot->name, slot->dev.vio_dev->dev.bus_id);
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info("%s: registered VIO device[name=%s vio_dev=%p]\n",
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__FUNCTION__, slot->name, slot->dev.vio_dev);
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rc = register_slot(slot);
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exit_rc:
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if (rc && slot)
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dealloc_slot_struct(slot);
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return (rc);
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}
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int rpaphp_enable_vio_slot(struct slot *slot)
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{
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int retval = 0;
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if ((slot->dev.vio_dev = vio_register_device_node(slot->dn))) {
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info("%s: VIO adapter %s in slot[%s] has been configured\n",
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__FUNCTION__, slot->dn->name, slot->name);
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slot->state = CONFIGURED;
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} else {
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info("%s: no vio_dev struct for adapter in slot[%s]\n",
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__FUNCTION__, slot->name);
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slot->state = NOT_CONFIGURED;
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}
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return retval;
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}
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