diff options
Diffstat (limited to 'drivers/pci/hotplug')
| -rw-r--r-- | drivers/pci/hotplug/rpaphp_core.c | 89 |
1 files changed, 69 insertions, 20 deletions
diff --git a/drivers/pci/hotplug/rpaphp_core.c b/drivers/pci/hotplug/rpaphp_core.c index e18e9a0e959c..75d577126144 100644 --- a/drivers/pci/hotplug/rpaphp_core.c +++ b/drivers/pci/hotplug/rpaphp_core.c @@ -328,23 +328,48 @@ static int is_php_dn(struct device_node *dn, const int **indexes, return 1; } -/** - * rpaphp_add_slot -- declare a hotplug slot to the hotplug subsystem. - * @dn: device node of slot - * - * This subroutine will register a hotpluggable slot with the - * PCI hotplug infrastructure. This routine is typically called - * during boot time, if the hotplug slots are present at boot time, - * or is called later, by the dlpar add code, if the slot is - * being dynamically added during runtime. - * - * If the device node points at an embedded (built-in) slot, this - * routine will just return without doing anything, since embedded - * slots cannot be hotplugged. - * - * To remove a slot, it suffices to call rpaphp_deregister_slot(). - */ -int rpaphp_add_slot(struct device_node *dn) +static int rpaphp_drc_info_add_slot(struct device_node *dn) +{ + struct slot *slot; + struct property *info; + struct of_drc_info drc; + char drc_name[MAX_DRC_NAME_LEN]; + const __be32 *cur; + u32 count; + int retval = 0; + + info = of_find_property(dn, "ibm,drc-info", NULL); + if (!info) + return 0; + + cur = of_prop_next_u32(info, NULL, &count); + if (cur) + cur++; + else + return 0; + + of_read_drc_info_cell(&info, &cur, &drc); + if (!is_php_type(drc.drc_type)) + return 0; + + sprintf(drc_name, "%s%d", drc.drc_name_prefix, drc.drc_name_suffix_start); + + slot = alloc_slot_struct(dn, drc.drc_index_start, drc_name, drc.drc_power_domain); + if (!slot) + return -ENOMEM; + + slot->type = simple_strtoul(drc.drc_type, NULL, 10); + retval = rpaphp_enable_slot(slot); + if (!retval) + retval = rpaphp_register_slot(slot); + + if (retval) + dealloc_slot_struct(slot); + + return retval; +} + +static int rpaphp_drc_add_slot(struct device_node *dn) { struct slot *slot; int retval = 0; @@ -352,9 +377,6 @@ int rpaphp_add_slot(struct device_node *dn) const int *indexes, *names, *types, *power_domains; char *name, *type; - if (!dn->name || strcmp(dn->name, "pci")) - return 0; - /* If this is not a hotplug slot, return without doing anything. */ if (!is_php_dn(dn, &indexes, &names, &types, &power_domains)) return 0; @@ -393,6 +415,33 @@ int rpaphp_add_slot(struct device_node *dn) /* XXX FIXME: reports a failure only if last entry in loop failed */ return retval; } + +/** + * rpaphp_add_slot -- declare a hotplug slot to the hotplug subsystem. + * @dn: device node of slot + * + * This subroutine will register a hotpluggable slot with the + * PCI hotplug infrastructure. This routine is typically called + * during boot time, if the hotplug slots are present at boot time, + * or is called later, by the dlpar add code, if the slot is + * being dynamically added during runtime. + * + * If the device node points at an embedded (built-in) slot, this + * routine will just return without doing anything, since embedded + * slots cannot be hotplugged. + * + * To remove a slot, it suffices to call rpaphp_deregister_slot(). + */ +int rpaphp_add_slot(struct device_node *dn) +{ + if (!dn->name || strcmp(dn->name, "pci")) + return 0; + + if (of_find_property(dn, "ibm,drc-info", NULL)) + return rpaphp_drc_info_add_slot(dn); + else + return rpaphp_drc_add_slot(dn); +} EXPORT_SYMBOL_GPL(rpaphp_add_slot); static void __exit cleanup_slots(void) |