From 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 Mon Sep 17 00:00:00 2001 From: Linus Torvalds Date: Sat, 16 Apr 2005 15:20:36 -0700 Subject: Linux-2.6.12-rc2 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! --- drivers/pci/hotplug/rpaphp_core.c | 536 ++++++++++++++++++++++++++++++++++++++ 1 file changed, 536 insertions(+) create mode 100644 drivers/pci/hotplug/rpaphp_core.c (limited to 'drivers/pci/hotplug/rpaphp_core.c') diff --git a/drivers/pci/hotplug/rpaphp_core.c b/drivers/pci/hotplug/rpaphp_core.c new file mode 100644 index 000000000000..29117a3a3287 --- /dev/null +++ b/drivers/pci/hotplug/rpaphp_core.c @@ -0,0 +1,536 @@ +/* + * 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, bool, 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); + +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, +}; + +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 = (struct slot *)hotplug_slot->private; + + 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 = (struct slot *)hotplug_slot->private; + + 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 = (struct slot *)hotplug_slot->private; + + 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 = (struct slot *)hotplug_slot->private; + int retval = 0; + + 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 = (struct slot *)hotplug_slot->private; + + 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; +} + +int rpaphp_remove_slot(struct slot *slot) +{ + return deregister_slot(slot); +} + +static int get_children_props(struct device_node *dn, int **drc_indexes, + int **drc_names, int **drc_types, int **drc_power_domains) +{ + int *indexes, *names; + int *types, *domains; + + indexes = (int *) get_property(dn, "ibm,drc-indexes", NULL); + names = (int *) get_property(dn, "ibm,drc-names", NULL); + types = (int *) get_property(dn, "ibm,drc-types", NULL); + domains = (int *) get_property(dn, "ibm,drc-power-domains", NULL); + + if (!indexes || !names || !types || !domains) { + /* Slot does not have dynamically-removable children */ + return -EINVAL; + } + if (drc_indexes) + *drc_indexes = indexes; + if (drc_names) + /* &drc_names[1] contains NULL terminated slot names */ + *drc_names = names; + if (drc_types) + /* &drc_types[1] contains NULL terminated slot types */ + *drc_types = types; + if (drc_power_domains) + *drc_power_domains = domains; + + return 0; +} + +/* To get the DRC props describing the current node, first obtain it's + * my-drc-index property. Next obtain the DRC list from it's parent. Use + * the my-drc-index for correlation, and obtain the requested properties. + */ +int rpaphp_get_drc_props(struct device_node *dn, int *drc_index, + char **drc_name, char **drc_type, int *drc_power_domain) +{ + int *indexes, *names; + int *types, *domains; + unsigned int *my_index; + char *name_tmp, *type_tmp; + int i, rc; + + my_index = (int *) get_property(dn, "ibm,my-drc-index", NULL); + if (!my_index) { + /* Node isn't DLPAR/hotplug capable */ + return -EINVAL; + } + + rc = get_children_props(dn->parent, &indexes, &names, &types, &domains); + if (rc < 0) { + return -EINVAL; + } + + name_tmp = (char *) &names[1]; + type_tmp = (char *) &types[1]; + + /* Iterate through parent properties, looking for my-drc-index */ + for (i = 0; i < indexes[0]; i++) { + if ((unsigned int) indexes[i + 1] == *my_index) { + if (drc_name) + *drc_name = name_tmp; + if (drc_type) + *drc_type = type_tmp; + if (drc_index) + *drc_index = *my_index; + if (drc_power_domain) + *drc_power_domain = domains[i+1]; + return 0; + } + name_tmp += (strlen(name_tmp) + 1); + type_tmp += (strlen(type_tmp) + 1); + } + + return -EINVAL; +} + +static int is_php_type(char *drc_type) +{ + unsigned long value; + char *endptr; + + /* PCI Hotplug nodes have an integer for drc_type */ + value = simple_strtoul(drc_type, &endptr, 10); + if (endptr == drc_type) + return 0; + + return 1; +} + +static int is_php_dn(struct device_node *dn, int **indexes, int **names, + int **types, int **power_domains) +{ + int *drc_types; + int rc; + + rc = get_children_props(dn, indexes, names, &drc_types, power_domains); + if (rc >= 0) { + if (is_php_type((char *) &drc_types[1])) { + *types = drc_types; + return 1; + } + } + + return 0; +} + +static int is_dr_dn(struct device_node *dn, int **indexes, int **names, + int **types, int **power_domains, int **my_drc_index) +{ + int rc; + + *my_drc_index = (int *) get_property(dn, "ibm,my-drc-index", NULL); + if(!*my_drc_index) + return (0); + + if (!dn->parent) + return (0); + + rc = get_children_props(dn->parent, indexes, names, types, + power_domains); + return (rc >= 0); +} + +static inline int is_vdevice_root(struct device_node *dn) +{ + return !strcmp(dn->name, "vdevice"); +} + +int is_dlpar_type(const char *type_str) +{ + /* Only register DLPAR-capable nodes of drc-type PHB or SLOT */ + return (!strcmp(type_str, "PHB") || !strcmp(type_str, "SLOT")); +} + +/**************************************************************** + * rpaphp not only registers PCI hotplug slots(HOTPLUG), + * but also logical DR slots(EMBEDDED). + * HOTPLUG slot: An adapter can be physically added/removed. + * EMBEDDED slot: An adapter can be logically removed/added + * from/to a partition with the slot. + ***************************************************************/ +int rpaphp_add_slot(struct device_node *dn) +{ + struct slot *slot; + int retval = 0; + int i, *my_drc_index, slot_type; + 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) { + if (is_php_dn(dn, &indexes, &names, &types, &power_domains)) + slot_type = HOTPLUG; + else if (is_dr_dn(dn, &indexes, &names, &types, &power_domains, &my_drc_index)) + slot_type = EMBEDDED; + else goto exit; + + 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_type == HOTPLUG || + (slot_type == EMBEDDED && + indexes[i + 1] == my_drc_index[0] && + is_dlpar_type(type))) { + if (!(slot = alloc_slot_struct(dn, indexes[i + 1], name, + power_domains[i + 1]))) { + retval = -ENOMEM; + goto exit; + } + if (!strcmp(type, "PHB")) + slot->type = PHB; + else if (slot_type == EMBEDDED) + slot->type = EMBEDDED; + else + slot->type = simple_strtoul(type, NULL, 10); + + dbg(" Found drc-index:0x%x drc-name:%s drc-type:%s\n", + indexes[i + 1], name, type); + + retval = register_pci_slot(slot); + if (slot_type == EMBEDDED) + goto exit; + } + } + } +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 init_rpa(void) +{ + + init_MUTEX(&rpaphp_sem); + + /* initialize internal data structure etc. */ + init_slots(); + if (!num_slots) + return -ENODEV; + + return 0; +} + +static void __exit 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 = (struct slot *)hotplug_slot->private; + + 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 = -EINVAL; + struct slot *slot = (struct slot *)hotplug_slot->private; + + 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: + retval = rpaphp_unconfig_pci_adapter(slot); + 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); +EXPORT_SYMBOL_GPL(rpaphp_get_drc_props); -- cgit v1.2.3