/* * PCI Hot Plug Controller Driver for RPA-compliant PPC64 platform. * Copyright (C) 2003 Linda Xie * * 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 * */ #include #include #include #include #include #include #include #include #include #include /* for eeh_add_device() */ #include /* rtas_call */ #include /* for pci_controller */ #include "../pci.h" /* for pci_add_new_bus */ /* and pci_do_scan_bus */ #include "rpaphp.h" #include "pci_hotplug.h" int debug; static struct semaphore rpaphp_sem; LIST_HEAD(rpaphp_slot_head); int num_slots; #define DRIVER_VERSION "0.1" #define DRIVER_AUTHOR "Linda Xie " #define DRIVER_DESC "RPA HOT Plug PCI Controller Driver" #define MAX_LOC_CODE 128 MODULE_AUTHOR(DRIVER_AUTHOR); MODULE_DESCRIPTION(DRIVER_DESC); MODULE_LICENSE("GPL"); module_param(debug, int, 0644); static int enable_slot(struct hotplug_slot *slot); static int disable_slot(struct hotplug_slot *slot); static int set_attention_status(struct hotplug_slot *slot, u8 value); static int get_power_status(struct hotplug_slot *slot, u8 * value); static int get_attention_status(struct hotplug_slot *slot, u8 * value); static int get_adapter_status(struct hotplug_slot *slot, u8 * value); static int get_max_bus_speed(struct hotplug_slot *hotplug_slot, enum pci_bus_speed *value); static int get_cur_bus_speed(struct hotplug_slot *hotplug_slot, enum pci_bus_speed *value); struct hotplug_slot_ops rpaphp_hotplug_slot_ops = { .owner = THIS_MODULE, .enable_slot = enable_slot, .disable_slot = disable_slot, .set_attention_status = set_attention_status, .get_power_status = get_power_status, .get_attention_status = get_attention_status, .get_adapter_status = get_adapter_status, .get_max_bus_speed = get_max_bus_speed, .get_cur_bus_speed = get_cur_bus_speed, }; static inline struct slot *get_slot (struct hotplug_slot *hotplug_slot, const char *function) { if (!hotplug_slot) { dbg("%s - hotplug_slot == NULL\n", function); return NULL; } return (struct slot *)hotplug_slot->private; } static int rpaphp_get_attention_status(struct slot *slot) { return slot->hotplug_slot->info->attention_status; } /** * set_attention_status - set attention LED * echo 0 > attention -- set LED OFF * echo 1 > attention -- set LED ON * echo 2 > attention -- set LED ID(identify, light is blinking) * */ static int set_attention_status(struct hotplug_slot *hotplug_slot, u8 value) { int retval = 0; struct slot *slot = get_slot(hotplug_slot, __FUNCTION__); if (slot == NULL) return -ENODEV; down(&rpaphp_sem); switch (value) { case 0: retval = rpaphp_set_attention_status(slot, LED_OFF); hotplug_slot->info->attention_status = 0; break; case 1: default: retval = rpaphp_set_attention_status(slot, LED_ON); hotplug_slot->info->attention_status = 1; break; case 2: retval = rpaphp_set_attention_status(slot, LED_ID); hotplug_slot->info->attention_status = 2; break; } up(&rpaphp_sem); return retval; } /** * get_power_status - get power status of a slot * @hotplug_slot: slot to get status * @value: pointer to store status * * */ static int get_power_status(struct hotplug_slot *hotplug_slot, u8 * value) { int retval; struct slot *slot = get_slot(hotplug_slot, __FUNCTION__); if (slot == NULL) return -ENODEV; down(&rpaphp_sem); retval = rpaphp_get_power_status(slot, value); up(&rpaphp_sem); return retval; } /** * get_attention_status - get attention LED status * * */ static int get_attention_status(struct hotplug_slot *hotplug_slot, u8 * value) { int retval = 0; struct slot *slot = get_slot(hotplug_slot, __FUNCTION__); if (slot == NULL) return -ENODEV; down(&rpaphp_sem); *value = rpaphp_get_attention_status(slot); up(&rpaphp_sem); return retval; } static int get_adapter_status(struct hotplug_slot *hotplug_slot, u8 * value) { struct slot *slot = get_slot(hotplug_slot, __FUNCTION__); int retval = 0; if (slot == NULL) return -ENODEV; down(&rpaphp_sem); /* have to go through this */ switch (slot->dev_type) { case PCI_DEV: retval = rpaphp_get_pci_adapter_status(slot, 0, value); break; case VIO_DEV: retval = rpaphp_get_vio_adapter_status(slot, 0, value); break; default: retval = -EINVAL; } up(&rpaphp_sem); return retval; } static int get_max_bus_speed(struct hotplug_slot *hotplug_slot, enum pci_bus_speed *value) { struct slot *slot = get_slot(hotplug_slot, __FUNCTION__); if (slot == NULL) return -ENODEV; down(&rpaphp_sem); switch (slot->type) { case 1: case 2: case 3: case 4: case 5: case 6: *value = PCI_SPEED_33MHz; /* speed for case 1-6 */ break; case 7: case 8: *value = PCI_SPEED_66MHz; break; case 11: case 14: *value = PCI_SPEED_66MHz_PCIX; break; case 12: case 15: *value = PCI_SPEED_100MHz_PCIX; break; case 13: case 16: *value = PCI_SPEED_133MHz_PCIX; break; default: *value = PCI_SPEED_UNKNOWN; break; } up(&rpaphp_sem); return 0; } /* return dummy value because not sure if PRA provides any method... */ static int get_cur_bus_speed(struct hotplug_slot *hotplug_slot, enum pci_bus_speed *value) { struct slot *slot = get_slot(hotplug_slot, __FUNCTION__); if (slot == NULL) return -ENODEV; *value = PCI_SPEED_UNKNOWN; return 0; } int rpaphp_remove_slot(struct slot *slot) { int retval = 0; struct hotplug_slot *php_slot = slot->hotplug_slot; list_del(&slot->rpaphp_slot_list); /* remove "php_location" file */ rpaphp_sysfs_remove_attr_location(php_slot); retval = pci_hp_deregister(php_slot); if (retval) err("Problem unregistering a slot %s\n", slot->name); num_slots--; dbg("%s - Exit: rc[%d]\n", __FUNCTION__, retval); return retval; } static int is_php_dn(struct device_node *dn, int **indexes, int **names, int **types, int **power_domains) { *indexes = (int *) get_property(dn, "ibm,drc-indexes", NULL); if (!*indexes) return (0); /* &names[1] contains NULL terminated slot names */ *names = (int *) get_property(dn, "ibm,drc-names", NULL); if (!*names) return (0); /* &types[1] contains NULL terminated slot types */ *types = (int *) get_property(dn, "ibm,drc-types", NULL); if (!*types) return (0); /* power_domains[1...n] are the slot power domains */ *power_domains = (int *) get_property(dn, "ibm,drc-power-domains", NULL); if (!*power_domains) return (0); if (strcmp(dn->name, "pci") == 0 && !get_property(dn, "ibm,fw-pci-hot-plug-ctrl", NULL)) return (0); return (1); } static inline int is_vdevice_root(struct device_node *dn) { return !strcmp(dn->name, "vdevice"); } /************************************* * Add Hot Plug slot(s) to sysfs * ************************************/ int rpaphp_add_slot(struct device_node *dn) { struct slot *slot; int retval = 0; int i; int *indexes, *names, *types, *power_domains; char *name, *type; dbg("Entry %s: dn->full_name=%s\n", __FUNCTION__, dn->full_name); if (dn->parent && is_vdevice_root(dn->parent)) { /* register a VIO device */ retval = register_vio_slot(dn); goto exit; } /* register PCI devices */ if (dn->name != 0 && strcmp(dn->name, "pci") == 0 && is_php_dn(dn, &indexes, &names, &types, &power_domains)) { name = (char *) &names[1]; type = (char *) &types[1]; for (i = 0; i < indexes[0]; i++, name += (strlen(name) + 1), type += (strlen(type) + 1)) { if (!(slot = alloc_slot_struct(dn, indexes[i + 1], name, power_domains[i + 1]))) { retval = -ENOMEM; goto exit; } slot->type = simple_strtoul(type, NULL, 10); if (slot->type < 1 || slot->type > 16) slot->type = 0; retval = register_pci_slot(slot); } /* for indexes */ } /* end of PCI device_node */ exit: dbg("%s - Exit: num_slots=%d rc[%d]\n", __FUNCTION__, num_slots, retval); return retval; } /* * init_slots - initialize 'struct slot' structures for each slot * */ static void init_slots(void) { struct device_node *dn; for (dn = find_all_nodes(); dn; dn = dn->next) rpaphp_add_slot(dn); } static int init_rpa(void) { init_MUTEX(&rpaphp_sem); /* initialize internal data structure etc. */ init_slots(); if (!num_slots) return -ENODEV; return 0; } static void cleanup_slots(void) { struct list_head *tmp, *n; struct slot *slot; /* * Unregister all of our slots with the pci_hotplug subsystem, * and free up all memory that we had allocated. * memory will be freed in release_slot callback. */ list_for_each_safe(tmp, n, &rpaphp_slot_head) { slot = list_entry(tmp, struct slot, rpaphp_slot_list); list_del(&slot->rpaphp_slot_list); pci_hp_deregister(slot->hotplug_slot); } return; } static int __init rpaphp_init(void) { info(DRIVER_DESC " version: " DRIVER_VERSION "\n"); /* read all the PRA info from the system */ return init_rpa(); } static void __exit rpaphp_exit(void) { cleanup_slots(); } static int enable_slot(struct hotplug_slot *hotplug_slot) { int retval = 0; struct slot *slot = get_slot(hotplug_slot, __FUNCTION__); if (slot == NULL) return -ENODEV; if (slot->state == CONFIGURED) { dbg("%s: %s is already enabled\n", __FUNCTION__, slot->name); goto exit; } dbg("ENABLING SLOT %s\n", slot->name); down(&rpaphp_sem); switch (slot->dev_type) { case PCI_DEV: retval = rpaphp_enable_pci_slot(slot); break; case VIO_DEV: retval = rpaphp_enable_vio_slot(slot); break; default: retval = -EINVAL; } up(&rpaphp_sem); exit: dbg("%s - Exit: rc[%d]\n", __FUNCTION__, retval); return retval; } static int disable_slot(struct hotplug_slot *hotplug_slot) { int retval; struct slot *slot = get_slot(hotplug_slot, __FUNCTION__); if (slot == NULL) return -ENODEV; dbg("%s - Entry: slot[%s]\n", __FUNCTION__, slot->name); if (slot->state == NOT_CONFIGURED) { dbg("%s: %s is already disabled\n", __FUNCTION__, slot->name); goto exit; } dbg("DISABLING SLOT %s\n", slot->name); down(&rpaphp_sem); switch (slot->dev_type) { case PCI_DEV: rpaphp_set_attention_status(slot, LED_ID); retval = rpaphp_unconfig_pci_adapter(slot); rpaphp_set_attention_status(slot, LED_OFF); break; case VIO_DEV: retval = rpaphp_unconfig_vio_adapter(slot); break; default: retval = -ENODEV; } up(&rpaphp_sem); exit: dbg("%s - Exit: rc[%d]\n", __FUNCTION__, retval); return retval; } module_init(rpaphp_init); module_exit(rpaphp_exit); EXPORT_SYMBOL_GPL(rpaphp_add_slot); EXPORT_SYMBOL_GPL(rpaphp_remove_slot); EXPORT_SYMBOL_GPL(rpaphp_slot_head);