rpaphp_pci.c revision bf0af511fcc856649a2a39c627828695b580d124
11da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* 21da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * PCI Hot Plug Controller Driver for RPA-compliant PPC64 platform. 31da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Copyright (C) 2003 Linda Xie <lxie@us.ibm.com> 41da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 51da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * All rights reserved. 61da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 71da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * This program is free software; you can redistribute it and/or modify 81da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * it under the terms of the GNU General Public License as published by 91da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * the Free Software Foundation; either version 2 of the License, or (at 101da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * your option) any later version. 111da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 121da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * This program is distributed in the hope that it will be useful, but 131da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * WITHOUT ANY WARRANTY; without even the implied warranty of 141da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, GOOD TITLE or 151da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * NON INFRINGEMENT. See the GNU General Public License for more 161da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * details. 171da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 181da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * You should have received a copy of the GNU General Public License 191da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * along with this program; if not, write to the Free Software 201da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. 211da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 221da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Send feedback to <lxie@us.ibm.com> 231da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 241da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 251da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include <linux/pci.h> 264e57b6817880946a3a78d5d8cad1ace363f7e449Tim Schmielau#include <linux/string.h> 274e57b6817880946a3a78d5d8cad1ace363f7e449Tim Schmielau 281da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include <asm/pci-bridge.h> 291da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include <asm/rtas.h> 301da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include <asm/machdep.h> 311da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 324e57b6817880946a3a78d5d8cad1ace363f7e449Tim Schmielau#include "../pci.h" /* for pci_add_new_bus */ 331da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include "rpaphp.h" 341da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 35e06b80b78db96ca272db4ec0b26ce1092a1a9704Linas Vepstasint rpaphp_get_sensor_state(struct slot *slot, int *state) 361da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 371da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds int rc; 381da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds int setlevel; 391da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 401da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds rc = rtas_get_sensor(DR_ENTITY_SENSE, slot->index, state); 411da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 421da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (rc < 0) { 431da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (rc == -EFAULT || rc == -EEXIST) { 441da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds dbg("%s: slot must be power up to get sensor-state\n", 451da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds __FUNCTION__); 461da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 471da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* some slots have to be powered up 481da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * before get-sensor will succeed. 491da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 501da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds rc = rtas_set_power_level(slot->power_domain, POWER_ON, 511da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds &setlevel); 521da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (rc < 0) { 531da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds dbg("%s: power on slot[%s] failed rc=%d.\n", 541da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds __FUNCTION__, slot->name, rc); 551da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } else { 561da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds rc = rtas_get_sensor(DR_ENTITY_SENSE, 571da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds slot->index, state); 581da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 591da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } else if (rc == -ENODEV) 601da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds info("%s: slot is unusable\n", __FUNCTION__); 611da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds else 621da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds err("%s failed to get sensor state\n", __FUNCTION__); 631da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 641da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return rc; 651da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 661da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 67940903c5a5a906c622a79b3101586deb1a1b3480John Rosestatic void print_slot_pci_funcs(struct pci_bus *bus) 681da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 69940903c5a5a906c622a79b3101586deb1a1b3480John Rose struct device_node *dn; 701da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct pci_dev *dev; 711da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 72940903c5a5a906c622a79b3101586deb1a1b3480John Rose dn = pci_bus_to_OF_node(bus); 73940903c5a5a906c622a79b3101586deb1a1b3480John Rose if (!dn) 74940903c5a5a906c622a79b3101586deb1a1b3480John Rose return; 75940903c5a5a906c622a79b3101586deb1a1b3480John Rose 76940903c5a5a906c622a79b3101586deb1a1b3480John Rose dbg("%s: pci_devs of slot[%s]\n", __FUNCTION__, dn->full_name); 77940903c5a5a906c622a79b3101586deb1a1b3480John Rose list_for_each_entry (dev, &bus->devices, bus_list) 785eeb8c63a38ff20285f3bbe7bcfe5e7c33c8ba14John Rose dbg("\t%s\n", pci_name(dev)); 791da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return; 801da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 811da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 829c209c919df95f83aa042b3352c43841ad15a02bJohn Rosestatic void set_slot_name(struct slot *slot) 831da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 849c209c919df95f83aa042b3352c43841ad15a02bJohn Rose struct pci_bus *bus = slot->bus; 859c209c919df95f83aa042b3352c43841ad15a02bJohn Rose struct pci_dev *bridge; 869c209c919df95f83aa042b3352c43841ad15a02bJohn Rose 879c209c919df95f83aa042b3352c43841ad15a02bJohn Rose bridge = bus->self; 889c209c919df95f83aa042b3352c43841ad15a02bJohn Rose if (bridge) 899c209c919df95f83aa042b3352c43841ad15a02bJohn Rose strcpy(slot->name, pci_name(bridge)); 909c209c919df95f83aa042b3352c43841ad15a02bJohn Rose else 919c209c919df95f83aa042b3352c43841ad15a02bJohn Rose sprintf(slot->name, "%04x:%02x:00.0", pci_domain_nr(bus), 929c209c919df95f83aa042b3352c43841ad15a02bJohn Rose bus->number); 931da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 941da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 951da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic int setup_pci_slot(struct slot *slot) 961da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 979c209c919df95f83aa042b3352c43841ad15a02bJohn Rose struct device_node *dn = slot->dn; 981da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct pci_bus *bus; 991da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1009c209c919df95f83aa042b3352c43841ad15a02bJohn Rose BUG_ON(!dn); 10101657868be1c21b2b8b0e683ea24bdcc2331d522Linas Vepstas bus = pcibios_find_pci_bus(dn); 1029c209c919df95f83aa042b3352c43841ad15a02bJohn Rose if (!bus) { 1039c209c919df95f83aa042b3352c43841ad15a02bJohn Rose err("%s: no pci_bus for dn %s\n", __FUNCTION__, dn->full_name); 1049c209c919df95f83aa042b3352c43841ad15a02bJohn Rose goto exit_rc; 1051da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 1061da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1079c209c919df95f83aa042b3352c43841ad15a02bJohn Rose slot->bus = bus; 1089c209c919df95f83aa042b3352c43841ad15a02bJohn Rose slot->pci_devs = &bus->devices; 1099c209c919df95f83aa042b3352c43841ad15a02bJohn Rose set_slot_name(slot); 1109c209c919df95f83aa042b3352c43841ad15a02bJohn Rose 1111da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* find slot's pci_dev if it's not empty */ 1121da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (slot->hotplug_slot->info->adapter_status == EMPTY) { 1131da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds slot->state = EMPTY; /* slot is empty */ 1141da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } else { 1151da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* slot is occupied */ 1169c209c919df95f83aa042b3352c43841ad15a02bJohn Rose if (!dn->child) { 1171da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* non-empty slot has to have child */ 1181da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds err("%s: slot[%s]'s device_node doesn't have child for adapter\n", 1191da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds __FUNCTION__, slot->name); 1201da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds goto exit_rc; 1211da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 1221da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1231da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (slot->hotplug_slot->info->adapter_status == NOT_CONFIGURED) { 1241da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds dbg("%s CONFIGURING pci adapter in slot[%s]\n", 1251da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds __FUNCTION__, slot->name); 1267fec77e4793f307b30846a3d4015d329ffc0b685Linas Vepstas pcibios_add_pci_devices(slot->bus); 1271da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1281da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } else if (slot->hotplug_slot->info->adapter_status != CONFIGURED) { 1291da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds err("%s: slot[%s]'s adapter_status is NOT_VALID.\n", 1301da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds __FUNCTION__, slot->name); 1311da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds goto exit_rc; 1321da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 133940903c5a5a906c622a79b3101586deb1a1b3480John Rose print_slot_pci_funcs(slot->bus); 1345eeb8c63a38ff20285f3bbe7bcfe5e7c33c8ba14John Rose if (!list_empty(slot->pci_devs)) { 1351da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds slot->state = CONFIGURED; 1361da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } else { 1371da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* DLPAR add as opposed to 1381da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * boot time */ 1391da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds slot->state = NOT_CONFIGURED; 1401da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 1411da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 1421da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return 0; 1431da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsexit_rc: 1441da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return -EINVAL; 1451da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 1461da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 147f6afbad82c6b7bab0198442592b110341fb419baLinas Vepstasint rpaphp_register_pci_slot(struct slot *slot) 1481da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 149bf0af511fcc856649a2a39c627828695b580d124Linas Vepstas int rc, level, state; 150bf0af511fcc856649a2a39c627828695b580d124Linas Vepstas struct pci_bus *bus; 151517d5a0417e19101eaa769039d1921d626ee546cLinas Vepstas struct hotplug_slot_info *info = slot->hotplug_slot->info; 152517d5a0417e19101eaa769039d1921d626ee546cLinas Vepstas 153bf0af511fcc856649a2a39c627828695b580d124Linas Vepstas /* Find out if the power is turned on for the slot */ 154427310ff02e80cc80826407c0121cec3694c9e7dLinas Vepstas rc = rtas_get_power_level(slot->power_domain, &level); 155427310ff02e80cc80826407c0121cec3694c9e7dLinas Vepstas if (rc) 156427310ff02e80cc80826407c0121cec3694c9e7dLinas Vepstas return rc; 157427310ff02e80cc80826407c0121cec3694c9e7dLinas Vepstas info->power_status = level; 158427310ff02e80cc80826407c0121cec3694c9e7dLinas Vepstas 159bf0af511fcc856649a2a39c627828695b580d124Linas Vepstas /* Figure out if there is an adapter in the slot */ 160bf0af511fcc856649a2a39c627828695b580d124Linas Vepstas info->adapter_status = NOT_VALID; 161bf0af511fcc856649a2a39c627828695b580d124Linas Vepstas rc = rpaphp_get_sensor_state(slot, &state); 162bf0af511fcc856649a2a39c627828695b580d124Linas Vepstas if (rc) 163bf0af511fcc856649a2a39c627828695b580d124Linas Vepstas return rc; 164517d5a0417e19101eaa769039d1921d626ee546cLinas Vepstas 165bf0af511fcc856649a2a39c627828695b580d124Linas Vepstas if (state == EMPTY) 166bf0af511fcc856649a2a39c627828695b580d124Linas Vepstas info->adapter_status = EMPTY; 167bf0af511fcc856649a2a39c627828695b580d124Linas Vepstas else if (state == PRESENT) { 168bf0af511fcc856649a2a39c627828695b580d124Linas Vepstas bus = pcibios_find_pci_bus(slot->dn); 169bf0af511fcc856649a2a39c627828695b580d124Linas Vepstas if (bus && !list_empty(&bus->devices)) 170bf0af511fcc856649a2a39c627828695b580d124Linas Vepstas info->adapter_status = CONFIGURED; 171bf0af511fcc856649a2a39c627828695b580d124Linas Vepstas else 172bf0af511fcc856649a2a39c627828695b580d124Linas Vepstas info->adapter_status = NOT_CONFIGURED; 173517d5a0417e19101eaa769039d1921d626ee546cLinas Vepstas } 1741da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1751da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (setup_pci_slot(slot)) 176517d5a0417e19101eaa769039d1921d626ee546cLinas Vepstas return -EINVAL; 177517d5a0417e19101eaa769039d1921d626ee546cLinas Vepstas 178517d5a0417e19101eaa769039d1921d626ee546cLinas Vepstas return rpaphp_register_slot(slot); 1791da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 1801da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 181