diff options
Diffstat (limited to 'drivers/pci/hotplug/rpaphp_vio.c')
| -rw-r--r-- | drivers/pci/hotplug/rpaphp_vio.c | 129 |
1 files changed, 129 insertions, 0 deletions
diff --git a/drivers/pci/hotplug/rpaphp_vio.c b/drivers/pci/hotplug/rpaphp_vio.c new file mode 100644 index 00000000000..74df6a305e6 --- /dev/null +++ b/drivers/pci/hotplug/rpaphp_vio.c @@ -0,0 +1,129 @@ +/* + * 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; +} |