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Commit 41702685 authored by Takayoshi Kouchi's avatar Takayoshi Kouchi Committed by Greg Kroah-Hartman
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[PATCH] ACPI PCI hotplug driver for 2.5

parent e87de9d3
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drivers/hotplug/Config.help
View file @ 41702685
......@@ -40,3 +40,14 @@ CONFIG_HOTPLUG_PCI_IBM
When in doubt, say N.
CONFIG_HOTPLUG_PCI_ACPI
Say Y here if you have a system that supports PCI Hotplug using
ACPI.
This code is also available as a module ( = code which can be
inserted in and removed from the running kernel whenever you want).
The module will be called acpiphp.o. If you want to compile it
as a module, say M here and read <file:Documentation/modules.txt>.
When in doubt, say N.
drivers/hotplug/Config.in
View file @ 41702685
......@@ -11,5 +11,6 @@ dep_mbool ' Save configuration into NVRAM on Compaq servers' CONFIG_HOTPLUG_P
if [ "$CONFIG_X86_IO_APIC" = "y" ]; then
dep_tristate ' IBM PCI Hotplug driver' CONFIG_HOTPLUG_PCI_IBM $CONFIG_HOTPLUG_PCI $CONFIG_X86_IO_APIC $CONFIG_X86
fi
dep_tristate ' ACPI PCI Hotplug driver' CONFIG_HOTPLUG_PCI_ACPI $CONFIG_APCI $CONFIG_HOTPLUG_PCI
endmenu
drivers/hotplug/Makefile
View file @ 41702685
......@@ -7,6 +7,7 @@ export-objs := pci_hotplug_core.o pci_hotplug_util.o
obj-$(CONFIG_HOTPLUG_PCI) += pci_hotplug.o
obj-$(CONFIG_HOTPLUG_PCI_COMPAQ) += cpqphp.o
obj-$(CONFIG_HOTPLUG_PCI_IBM) += ibmphp.o
obj-$(CONFIG_HOTPLUG_PCI_ACPI) += acpiphp.o
pci_hotplug-objs := pci_hotplug_core.o \
pci_hotplug_util.o
......@@ -22,6 +23,18 @@ ibmphp-objs := ibmphp_core.o \
ibmphp_res.o \
ibmphp_hpc.o
acpiphp-objs := acpiphp_core.o \
acpiphp_glue.o \
acpiphp_pci.o \
acpiphp_res.o
ifdef CONFIG_HOTPLUG_PCI_ACPI
EXTRA_CFLAGS += -D_LINUX -I$(TOPDIR)/drivers/acpi
ifdef CONFIG_ACPI_DEBUG
EXTRA_CFLAGS += -DACPI_DEBUG_OUTPUT
endif
endif
ifeq ($(CONFIG_HOTPLUG_PCI_COMPAQ_NVRAM),y)
cpqphp-objs += cpqphp_nvram.o
endif
......
drivers/hotplug/acpiphp.h 0 → 100644
View file @ 41702685
/*
* ACPI PCI Hot Plug Controller Driver
*
* Copyright (c) 1995,2001 Compaq Computer Corporation
* Copyright (c) 2001 Greg Kroah-Hartman (greg@kroah.com)
* Copyright (c) 2001 IBM Corp.
* Copyright (c) 2002 Hiroshi Aono (h-aono@ap.jp.nec.com)
* Copyright (c) 2002 Takayoshi Kochi (t-kouchi@cq.jp.nec.com)
* Copyright (c) 2002 NEC Corporation
*
* 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 <gregkh@us.ibm.com>,
* <h-aono@ap.jp.nec.com>,
* <t-kouchi@cq.jp.nec.com>
*
*/
#ifndef _ACPIPHP_H
#define _ACPIPHP_H
#include "include/acpi.h"
#include "pci_hotplug.h"
#include "acpi_bus.h"
#define dbg(format, arg...) \
do { \
if (acpiphp_debug) \
printk (KERN_DEBUG "%s: " format "\n", \
MY_NAME , ## arg); \
} while (0)
#define err(format, arg...) printk (KERN_ERR "%s: " format "\n", MY_NAME , ## arg)
#define info(format, arg...) printk (KERN_INFO "%s: " format "\n", MY_NAME , ## arg)
#define warn(format, arg...) printk (KERN_WARNING "%s: " format "\n", MY_NAME , ## arg)
#define SLOT_MAGIC 0x67267322
/* name size which is used for entries in pcihpfs */
#define SLOT_NAME_SIZE 32 /* ACPI{_SUN}-{BUS}:{DEV} */
struct acpiphp_bridge;
struct acpiphp_slot;
struct pci_resource;
/*
* struct slot - slot information for each *physical* slot
*/
struct slot {
u32 magic;
u8 number;
struct hotplug_slot *hotplug_slot;
struct list_head slot_list;
struct acpiphp_slot *acpi_slot;
};
/*
* struct pci_resource - describes pci resource (mem, pfmem, io, bus)
*/
struct pci_resource {
struct pci_resource * next;
u64 base;
u32 length;
};
/**
* struct hpp_param - ACPI 2.0 _HPP Hot Plug Parameters
* @cache_line_size in DWORD
* @latency_timer in PCI clock
* @enable_SERR 0 or 1
* @enable_PERR 0 or 1
*/
struct hpp_param {
u8 cache_line_size;
u8 latency_timer;
u8 enable_SERR;
u8 enable_PERR;
};
/**
* struct acpiphp_bridge - PCI bridge information
*
* for each bridge device in ACPI namespace
*/
struct acpiphp_bridge {
struct list_head list;
acpi_handle handle;
struct acpiphp_slot *slots;
int type;
int nr_slots;
u8 seg;
u8 bus;
u8 sub;
u32 flags;
/* This bus (host bridge) or Secondary bus (PCI-to-PCI bridge) */
struct pci_bus *pci_bus;
/* PCI-to-PCI bridge device */
struct pci_dev *pci_dev;
/* ACPI 2.0 _HPP parameters */
struct hpp_param hpp;
spinlock_t res_lock;
/* available resources on this bus */
struct pci_resource *mem_head;
struct pci_resource *p_mem_head;
struct pci_resource *io_head;
struct pci_resource *bus_head;
};
/**
* struct acpiphp_slot - PCI slot information
*
* PCI slot information for each *physical* PCI slot
*/
struct acpiphp_slot {
struct acpiphp_slot *next;
struct acpiphp_bridge *bridge; /* parent */
struct list_head funcs; /* one slot may have different
objects (i.e. for each function) */
struct semaphore crit_sect;
u32 id; /* slot id (serial #) for hotplug core */
u8 device; /* pci device# */
u32 sun; /* ACPI _SUN (slot unique number) */
u32 slotno; /* slot number relative to bridge */
u32 flags; /* see below */
};
/**
* struct acpiphp_func - PCI function information
*
* PCI function information for each object in ACPI namespace
* typically 8 objects per slot (i.e. for each PCI function)
*/
struct acpiphp_func {
struct acpiphp_slot *slot; /* parent */
struct list_head sibling;
struct pci_dev *pci_dev;
acpi_handle handle;
u8 function; /* pci function# */
u32 flags; /* see below */
/* resources used for this function */
struct pci_resource *mem_head;
struct pci_resource *p_mem_head;
struct pci_resource *io_head;
struct pci_resource *bus_head;
};
/* PCI bus bridge HID */
#define ACPI_PCI_HOST_HID "PNP0A03"
/* PCI BRIDGE type */
#define BRIDGE_TYPE_HOST 0
#define BRIDGE_TYPE_P2P 1
/* ACPI _STA method value (ignore bit 4; battery present) */
#define ACPI_STA_PRESENT (0x00000001)
#define ACPI_STA_ENABLED (0x00000002)
#define ACPI_STA_SHOW_IN_UI (0x00000004)
#define ACPI_STA_FUNCTIONING (0x00000008)
#define ACPI_STA_ALL (0x0000000f)
/* bridge flags */
#define BRIDGE_HAS_STA (0x00000001)
#define BRIDGE_HAS_EJ0 (0x00000002)
#define BRIDGE_HAS_HPP (0x00000004)
#define BRIDGE_HAS_PS0 (0x00000010)
#define BRIDGE_HAS_PS1 (0x00000020)
#define BRIDGE_HAS_PS2 (0x00000040)
#define BRIDGE_HAS_PS3 (0x00000080)
/* slot flags */
#define SLOT_POWEREDON (0x00000001)
#define SLOT_ENABLED (0x00000002)
#define SLOT_MULTIFUNCTION (x000000004)
/* function flags */
#define FUNC_HAS_STA (0x00000001)
#define FUNC_HAS_EJ0 (0x00000002)
#define FUNC_HAS_PS0 (0x00000010)
#define FUNC_HAS_PS1 (0x00000020)
#define FUNC_HAS_PS2 (0x00000040)
#define FUNC_HAS_PS3 (0x00000080)
/* not yet */
#define SLOT_SUPPORT_66MHZ (0x00010000)
#define SLOT_SUPPORT_100MHZ (0x00020000)
#define SLOT_SUPPORT_133MHZ (0x00040000)
#define SLOT_SUPPORT_PCIX (0x00080000)
/* function prototypes */
/* acpiphp_glue.c */
extern int acpiphp_glue_init (void);
extern void acpiphp_glue_exit (void);
extern int acpiphp_get_num_slots (void);
extern struct acpiphp_slot *get_slot_from_id (int id);
typedef int (*acpiphp_callback)(struct acpiphp_slot *slot, void *data);
extern int acpiphp_for_each_slot (acpiphp_callback fn, void *data);
extern int acpiphp_check_bridge (struct acpiphp_bridge *bridge);
extern int acpiphp_enable_slot (struct acpiphp_slot *slot);
extern int acpiphp_disable_slot (struct acpiphp_slot *slot);
extern u8 acpiphp_get_power_status (struct acpiphp_slot *slot);
extern u8 acpiphp_get_attention_status (struct acpiphp_slot *slot);
extern u8 acpiphp_get_latch_status (struct acpiphp_slot *slot);
extern u8 acpiphp_get_adapter_status (struct acpiphp_slot *slot);
/* acpiphp_pci.c */
extern struct pci_dev *acpiphp_allocate_pcidev (struct pci_bus *pbus, int dev, int fn);
extern int acpiphp_configure_slot (struct acpiphp_slot *slot);
extern int acpiphp_configure_function (struct acpiphp_func *func);
extern int acpiphp_unconfigure_function (struct acpiphp_func *func);
extern int acpiphp_detect_pci_resource (struct acpiphp_bridge *bridge);
extern int acpiphp_init_func_resource (struct acpiphp_func *func);
/* acpiphp_res.c */
extern struct pci_resource *acpiphp_get_io_resource (struct pci_resource **head, u32 size);
extern struct pci_resource *acpiphp_get_max_resource (struct pci_resource **head, u32 size);
extern struct pci_resource *acpiphp_get_resource (struct pci_resource **head, u32 size);
extern struct pci_resource *acpiphp_get_resource_with_base (struct pci_resource **head, u64 base, u32 size);
extern int acpiphp_resource_sort_and_combine (struct pci_resource **head);
extern struct pci_resource *acpiphp_make_resource (u64 base, u32 length);
extern void acpiphp_move_resource (struct pci_resource **from, struct pci_resource **to);
extern void acpiphp_free_resource (struct pci_resource **res);
extern void acpiphp_dump_resource (struct acpiphp_bridge *bridge); /* debug */
extern void acpiphp_dump_func_resource (struct acpiphp_func *func); /* debug */
/* variables */
extern int acpiphp_debug;
#endif /* _ACPIPHP_H */
drivers/hotplug/acpiphp_core.c 0 → 100644
View file @ 41702685
/*
* ACPI PCI Hot Plug Controller Driver
*
* Copyright (c) 1995,2001 Compaq Computer Corporation
* Copyright (c) 2001 Greg Kroah-Hartman (greg@kroah.com)
* Copyright (c) 2001 IBM Corp.
* Copyright (c) 2002 Hiroshi Aono (h-aono@ap.jp.nec.com)
* Copyright (c) 2002 Takayoshi Kochi (t-kouchi@cq.jp.nec.com)
* Copyright (c) 2002 NEC Corporation
*
* 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 <gregkh@us.ibm.com>,
* <h-aono@ap.jp.nec.com>,
* <t-kouchi@cq.jp.nec.com>
*
*/
#include <linux/config.h>
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/pci.h>
#include <linux/slab.h>
#include <linux/smp.h>
#include <linux/smp_lock.h>
#include <linux/init.h>
#include "pci_hotplug.h"
#include "acpiphp.h"
static LIST_HEAD(slot_list);
#if !defined(CONFIG_HOTPLUG_PCI_ACPI_MODULE)
#define MY_NAME "acpiphp"
#else
#define MY_NAME THIS_MODULE->name
#endif
int acpiphp_debug;
/* local variables */
static int num_slots;
#define DRIVER_VERSION "0.4"
#define DRIVER_AUTHOR "Greg Kroah-Hartman <gregkh@us.ibm.com>, Takayoshi Kochi <t-kouchi@cq.jp.nec.com>"
#define DRIVER_DESC "ACPI Hot Plug PCI Controller Driver"
MODULE_AUTHOR(DRIVER_AUTHOR);
MODULE_DESCRIPTION(DRIVER_DESC);
MODULE_LICENSE("GPL");
MODULE_PARM(acpiphp_debug, "i");
MODULE_PARM_DESC(acpiphp_debug, "Debugging mode enabled or not");
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 hardware_test (struct hotplug_slot *slot, u32 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_latch_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);
static struct hotplug_slot_ops acpi_hotplug_slot_ops = {
.owner = THIS_MODULE,
.enable_slot = enable_slot,
.disable_slot = disable_slot,
.set_attention_status = set_attention_status,
.hardware_test = hardware_test,
.get_power_status = get_power_status,
.get_attention_status = get_attention_status,
.get_latch_status = get_latch_status,
.get_adapter_status = get_adapter_status,
.get_max_bus_speed = get_max_bus_speed,
.get_cur_bus_speed = get_cur_bus_speed,
};
/* Inline functions to check the sanity of a pointer that is passed to us */
static inline int slot_paranoia_check (struct slot *slot, const char *function)
{
if (!slot) {
dbg("%s - slot == NULL", function);
return -1;
}
if (slot->magic != SLOT_MAGIC) {
dbg("%s - bad magic number for slot", function);
return -1;
}
if (!slot->hotplug_slot) {
dbg("%s - slot->hotplug_slot == NULL!", function);
return -1;
}
return 0;
}
static inline struct slot *get_slot (struct hotplug_slot *hotplug_slot, const char *function)
{
struct slot *slot;
if (!hotplug_slot) {
dbg("%s - hotplug_slot == NULL", function);
return NULL;
}
slot = (struct slot *)hotplug_slot->private;
if (slot_paranoia_check (slot, function))
return NULL;
return slot;
}
/**
* enable_slot - power on and enable a slot
* @hotplug_slot: slot to enable
*
* Actual tasks are done in acpiphp_enable_slot()
*
*/
static int enable_slot (struct hotplug_slot *hotplug_slot)
{
struct slot *slot = get_slot (hotplug_slot, __FUNCTION__);
int retval = 0;
if (slot == NULL)
return -ENODEV;
dbg ("%s - physical_slot = %s", __FUNCTION__, hotplug_slot->name);
/* enable the specified slot */
retval = acpiphp_enable_slot (slot->acpi_slot);
return retval;
}
/**
* disable_slot - disable and power off a slot
* @hotplug_slot: slot to disable
*
* Actual tasks are done in acpiphp_disable_slot()
*
*/
static int disable_slot (struct hotplug_slot *hotplug_slot)
{
struct slot *slot = get_slot (hotplug_slot, __FUNCTION__);
int retval = 0;
if (slot == NULL)
return -ENODEV;
dbg ("%s - physical_slot = %s", __FUNCTION__, hotplug_slot->name);
/* disable the specified slot */
retval = acpiphp_disable_slot (slot->acpi_slot);
return retval;
}
/**
* set_attention_status - set attention LED
*
* TBD:
* ACPI doesn't have known method to manipulate
* attention status LED.
*
*/
static int set_attention_status (struct hotplug_slot *hotplug_slot, u8 status)
{
int retval = 0;
dbg ("%s - physical_slot = %s", __FUNCTION__, hotplug_slot->name);
switch (status) {
case 0:
/* FIXME turn light off */
hotplug_slot->info->attention_status = 0;
break;
case 1:
default:
/* FIXME turn light on */
hotplug_slot->info->attention_status = 1;
break;
}
return retval;
}
/**
* hardware_test - hardware test
*
* We have nothing to do for now...
*
*/
static int hardware_test (struct hotplug_slot *hotplug_slot, u32 value)
{
struct slot *slot = get_slot (hotplug_slot, __FUNCTION__);
int retval = 0;
if (slot == NULL)
return -ENODEV;
dbg ("%s - physical_slot = %s", __FUNCTION__, hotplug_slot->name);
err ("No hardware tests are defined for this driver");
retval = -ENODEV;
return retval;
}
/**
* get_power_status - get power status of a slot
* @hotplug_slot: slot to get status
* @value: pointer to store status
*
* Some platforms may not implement _STA method properly.
* In that case, the value returned may not be reliable.
*
*/
static int get_power_status (struct hotplug_slot *hotplug_slot, u8 *value)
{
struct slot *slot = get_slot (hotplug_slot, __FUNCTION__);
int retval = 0;
if (slot == NULL)
return -ENODEV;
dbg("%s - physical_slot = %s", __FUNCTION__, hotplug_slot->name);
*value = acpiphp_get_power_status (slot->acpi_slot);
return retval;
}
/**
* get_attention_status - get attention LED status
*
* TBD:
* ACPI doesn't provide any formal means to access attention LED status.
*
*/
static int get_attention_status (struct hotplug_slot *hotplug_slot, u8 *value)
{
int retval = 0;
dbg("%s - physical_slot = %s", __FUNCTION__, hotplug_slot->name);
*value = hotplug_slot->info->attention_status;
return retval;
}
/**
* get_latch_status - get latch status of a slot
* @hotplug_slot: slot to get status
* @value: pointer to store status
*
* ACPI doesn't provide any formal means to access latch status.
* Instead, we fake latch status from _STA
*
*/
static int get_latch_status (struct hotplug_slot *hotplug_slot, u8 *value)
{
struct slot *slot = get_slot (hotplug_slot, __FUNCTION__);
int retval = 0;
if (slot == NULL)
return -ENODEV;
dbg("%s - physical_slot = %s", __FUNCTION__, hotplug_slot->name);
*value = acpiphp_get_latch_status (slot->acpi_slot);
return retval;
}
/**
* get_adapter_status - get adapter status of a slot
* @hotplug_slot: slot to get status
* @value: pointer to store status
*
* ACPI doesn't provide any formal means to access adapter status.
* Instead, we fake adapter status from _STA
*
*/
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;
dbg("%s - physical_slot = %s", __FUNCTION__, hotplug_slot->name);
*value = acpiphp_get_adapter_status (slot->acpi_slot);
return retval;
}
/* return dummy value because ACPI doesn't provide any method... */
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;
*value = PCI_SPEED_UNKNOWN;
return 0;
}
/* return dummy value because ACPI doesn't provide 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;
}
static int init_acpi (void)
{
int retval;
/* initialize internal data structure etc. */
retval = acpiphp_glue_init();
/* read initial number of slots */
if (!retval) {
num_slots = acpiphp_get_num_slots();
if (num_slots == 0)
retval = -ENODEV;
}
return retval;
}
/**
* make_slot_name - make a slot name that appears in pcihpfs
* @slot: slot to name
*
*/
static void make_slot_name (struct slot *slot)
{
snprintf (slot->hotplug_slot->name, SLOT_NAME_SIZE, "ACPI%d-%02x:%02x",
slot->acpi_slot->sun,
slot->acpi_slot->bridge->bus,
slot->acpi_slot->device);
}
/**
* init_slots - initialize 'struct slot' structures for each slot
*
*/
static int init_slots (void)
{
struct slot *slot;
int retval = 0;
int i;
for (i = 0; i < num_slots; ++i) {
slot = kmalloc (sizeof (struct slot), GFP_KERNEL);
if (!slot)
return -ENOMEM;
memset(slot, 0, sizeof(struct slot));
slot->hotplug_slot = kmalloc (sizeof (struct hotplug_slot), GFP_KERNEL);
if (!slot->hotplug_slot) {
kfree (slot);
return -ENOMEM;
}
memset(slot->hotplug_slot, 0, sizeof (struct hotplug_slot));
slot->hotplug_slot->info = kmalloc (sizeof (struct hotplug_slot_info), GFP_KERNEL);
if (!slot->hotplug_slot->info) {
kfree (slot->hotplug_slot);
kfree (slot);
return -ENOMEM;
}
memset(slot->hotplug_slot->info, 0, sizeof (struct hotplug_slot_info));
slot->hotplug_slot->name = kmalloc (SLOT_NAME_SIZE, GFP_KERNEL);
if (!slot->hotplug_slot->name) {
kfree (slot->hotplug_slot->info);
kfree (slot->hotplug_slot);
kfree (slot);
return -ENOMEM;
}
slot->magic = SLOT_MAGIC;
slot->number = i;
slot->hotplug_slot->private = slot;
slot->hotplug_slot->ops = &acpi_hotplug_slot_ops;
slot->acpi_slot = get_slot_from_id (i);
slot->hotplug_slot->info->power_status = acpiphp_get_power_status(slot->acpi_slot);
slot->hotplug_slot->info->attention_status = acpiphp_get_attention_status(slot->acpi_slot);
slot->hotplug_slot->info->latch_status = acpiphp_get_latch_status(slot->acpi_slot);
slot->hotplug_slot->info->adapter_status = acpiphp_get_adapter_status(slot->acpi_slot);
make_slot_name (slot);
retval = pci_hp_register (slot->hotplug_slot);
if (retval) {
err ("pci_hp_register failed with error %d", retval);
kfree (slot->hotplug_slot->info);
kfree (slot->hotplug_slot->name);
kfree (slot->hotplug_slot);
kfree (slot);
return retval;
}
/* add slot to our internal list */
list_add (&slot->slot_list, &slot_list);
info("Slot [%s] registered", slot->hotplug_slot->name);
}
return retval;
}
static void cleanup_slots (void)
{
struct list_head *tmp, *n;
struct slot *slot;
list_for_each_safe (tmp, n, &slot_list) {
slot = list_entry (tmp, struct slot, slot_list);
list_del (&slot->slot_list);
pci_hp_deregister (slot->hotplug_slot);
kfree (slot->hotplug_slot->info);
kfree (slot->hotplug_slot->name);
kfree (slot->hotplug_slot);
kfree (slot);
}
return;
}
static int __init acpiphp_init(void)
{
int retval;
info (DRIVER_DESC " version: " DRIVER_VERSION);
/* read all the ACPI info from the system */
retval = init_acpi();
if (retval)
return retval;
retval = init_slots();
if (retval)
return retval;
return 0;
}
static void __exit acpiphp_exit(void)
{
cleanup_slots();
/* deallocate internal data structures etc. */
acpiphp_glue_exit();
}
module_init(acpiphp_init);
module_exit(acpiphp_exit);
drivers/hotplug/acpiphp_glue.c 0 → 100644
View file @ 41702685
/*
* ACPI PCI HotPlug glue functions to ACPI CA subsystem
*
* Copyright (c) 2002 Takayoshi Kochi (t-kouchi@cq.jp.nec.com)
* Copyright (c) 2002 Hiroshi Aono (h-aono@ap.jp.nec.com)
* Copyright (c) 2002 NEC Corporation
*
* 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 <t-kouchi@cq.jp.nec.com>
*
*/
#include <linux/config.h>
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/pci.h>
#include <linux/smp_lock.h>
#include <linux/init.h>
#include <asm/semaphore.h>
#include "pci_hotplug.h"
#include "acpiphp.h"
static LIST_HEAD(bridge_list);
#define MY_NAME "acpiphp_glue"
static void handle_hotplug_event_bridge (acpi_handle, u32, void *);
static void handle_hotplug_event_func (acpi_handle, u32, void *);
/*
* initialization & terminatation routines
*/
/**
* is_ejectable - determine if a slot is ejectable
* @handle: handle to acpi namespace
*
* Ejectable slot should satisfy at least these conditions:
*
* 1. has _ADR method
* 2. has _EJ0 method
*
* optionally
*
* 1. has _STA method
* 2. has _PS0 method
* 3. has _PS3 method
* 4. ..
*
*/
static int is_ejectable (acpi_handle handle)
{
acpi_status status;
acpi_handle tmp;
status = acpi_get_handle(handle, "_ADR", &tmp);
if (ACPI_FAILURE(status)) {
return 0;
}
status = acpi_get_handle(handle, "_EJ0", &tmp);
if (ACPI_FAILURE(status)) {
return 0;
}
return 1;
}
/* callback routine to check the existence of ejectable slots */
static acpi_status
is_ejectable_slot (acpi_handle handle, u32 lvl, void *context, void **rv)
{
int *count = (int *)context;
if (is_ejectable(handle)) {
(*count)++;
/* only one ejectable slot is enough */
return AE_CTRL_TERMINATE;
} else {
return AE_OK;
}
}
/* callback routine to register each ACPI PCI slot object */
static acpi_status
register_slot (acpi_handle handle, u32 lvl, void *context, void **rv)
{
struct acpiphp_bridge *bridge = (struct acpiphp_bridge *)context;
struct acpiphp_slot *slot;
struct acpiphp_func *newfunc;
acpi_handle tmp;
acpi_status status = AE_OK;
unsigned long adr, sun;
int device, function;
static int num_slots = 0; /* XXX if we support I/O node hotplug... */
status = acpi_evaluate_integer(handle, "_ADR", NULL, &adr);
if (ACPI_FAILURE(status))
return AE_OK;
status = acpi_get_handle(handle, "_EJ0", &tmp);
if (ACPI_FAILURE(status))
return AE_OK;
device = (adr >> 16) & 0xffff;
function = adr & 0xffff;
newfunc = kmalloc(sizeof(struct acpiphp_func), GFP_KERNEL);
if (!newfunc)
return AE_NO_MEMORY;
memset(newfunc, 0, sizeof(struct acpiphp_func));
INIT_LIST_HEAD(&newfunc->sibling);
newfunc->handle = handle;
newfunc->function = function;
newfunc->flags = FUNC_HAS_EJ0;
if (ACPI_SUCCESS(acpi_get_handle(handle, "_STA", &tmp)))
newfunc->flags |= FUNC_HAS_STA;
if (ACPI_SUCCESS(acpi_get_handle(handle, "_PS0", &tmp)))
newfunc->flags |= FUNC_HAS_PS0;
if (ACPI_SUCCESS(acpi_get_handle(handle, "_PS3", &tmp)))
newfunc->flags |= FUNC_HAS_PS3;
status = acpi_evaluate_integer(handle, "_SUN", NULL, &sun);
if (ACPI_FAILURE(status))
sun = -1;
/* search for objects that share the same slot */
for (slot = bridge->slots; slot; slot = slot->next)
if (slot->device == device) {
if (slot->sun != sun)
warn("sibling found, but _SUN doesn't match!");
break;
}
if (!slot) {
slot = kmalloc(sizeof(struct acpiphp_slot), GFP_KERNEL);
if (!slot) {
kfree(newfunc);
return AE_NO_MEMORY;
}
memset(slot, 0, sizeof(struct acpiphp_slot));
slot->bridge = bridge;
slot->id = num_slots++;
slot->device = device;
slot->sun = sun;
INIT_LIST_HEAD(&slot->funcs);
init_MUTEX(&slot->crit_sect);
slot->next = bridge->slots;
bridge->slots = slot;
bridge->nr_slots++;
dbg("found ACPI PCI Hotplug slot at PCI %02x:%02x Slot:0x%x",
slot->bridge->bus, slot->device, slot->sun);
}
newfunc->slot = slot;
list_add_tail(&newfunc->sibling, &slot->funcs);
/* associate corresponding pci_dev */
newfunc->pci_dev = pci_find_slot(bridge->bus,
PCI_DEVFN(device, function));
if (newfunc->pci_dev) {
if (acpiphp_init_func_resource(newfunc) < 0) {
kfree(newfunc);
return AE_ERROR;
}
slot->flags |= (SLOT_ENABLED | SLOT_POWEREDON);
}
/* install notify handler */
status = acpi_install_notify_handler(handle,
ACPI_SYSTEM_NOTIFY,
handle_hotplug_event_func,
newfunc);
if (ACPI_FAILURE(status)) {
err("failed to register interrupt notify handler");
return status;
}
return AE_OK;
}
/* see if it's worth looking at this bridge */
static int detect_ejectable_slots (acpi_handle *bridge_handle)
{
acpi_status status;
int count;
count = 0;
/* only check slots defined directly below bridge object */
status = acpi_walk_namespace(ACPI_TYPE_DEVICE, bridge_handle, (u32)1,
is_ejectable_slot, (void *)&count, NULL);
return count;
}
/* decode ACPI _CRS data and convert into our internal resource list
* TBD: _TRA, etc.
*/
static void
decode_acpi_resource (acpi_resource *resource, struct acpiphp_bridge *bridge)
{
acpi_resource_address16 *address16_data;
acpi_resource_address32 *address32_data;
acpi_resource_address64 *address64_data;
struct pci_resource *res;
u32 resource_type, producer_consumer, address_length;
u64 min_address_range, max_address_range;
u16 cache_attribute = 0;
int done = 0, found;
/* shut up gcc */
resource_type = producer_consumer = address_length = 0;
min_address_range = max_address_range = 0;
while (!done) {
found = 0;
switch (resource->id) {
case ACPI_RSTYPE_ADDRESS16:
address16_data = (acpi_resource_address16 *)&resource->data;
resource_type = address16_data->resource_type;
producer_consumer = address16_data->producer_consumer;
min_address_range = address16_data->min_address_range;
max_address_range = address16_data->max_address_range;
address_length = address16_data->address_length;
if (resource_type == ACPI_MEMORY_RANGE)
cache_attribute = address16_data->attribute.memory.cache_attribute;
found = 1;
break;
case ACPI_RSTYPE_ADDRESS32:
address32_data = (acpi_resource_address32 *)&resource->data;
resource_type = address32_data->resource_type;
producer_consumer = address32_data->producer_consumer;
min_address_range = address32_data->min_address_range;
max_address_range = address32_data->max_address_range;
address_length = address32_data->address_length;
if (resource_type == ACPI_MEMORY_RANGE)
cache_attribute = address32_data->attribute.memory.cache_attribute;
found = 1;
break;
case ACPI_RSTYPE_ADDRESS64:
address64_data = (acpi_resource_address64 *)&resource->data;
resource_type = address64_data->resource_type;
producer_consumer = address64_data->producer_consumer;
min_address_range = address64_data->min_address_range;
max_address_range = address64_data->max_address_range;
address_length = address64_data->address_length;
if (resource_type == ACPI_MEMORY_RANGE)
cache_attribute = address64_data->attribute.memory.cache_attribute;
found = 1;
break;
case ACPI_RSTYPE_END_TAG:
done = 1;
break;
default:
/* ignore */
break;
}
resource = (acpi_resource *)((char*)resource + resource->length);
if (found && producer_consumer == ACPI_PRODUCER && address_length > 0) {
switch (resource_type) {
case ACPI_MEMORY_RANGE:
if (cache_attribute == ACPI_PREFETCHABLE_MEMORY) {
dbg("resource type: prefetchable memory 0x%x - 0x%x", (u32)min_address_range, (u32)max_address_range);
res = acpiphp_make_resource(min_address_range,
address_length);
if (!res) {
err("out of memory");
return;
}
res->next = bridge->p_mem_head;
bridge->p_mem_head = res;
} else {
dbg("resource type: memory 0x%x - 0x%x", (u32)min_address_range, (u32)max_address_range);
res = acpiphp_make_resource(min_address_range,
address_length);
if (!res) {
err("out of memory");
return;
}
res->next = bridge->mem_head;
bridge->mem_head = res;
}
break;
case ACPI_IO_RANGE:
dbg("resource type: io 0x%x - 0x%x", (u32)min_address_range, (u32)max_address_range);
res = acpiphp_make_resource(min_address_range,
address_length);
if (!res) {
err("out of memory");
return;
}
res->next = bridge->io_head;
bridge->io_head = res;
break;
case ACPI_BUS_NUMBER_RANGE:
dbg("resource type: bus number %d - %d", (u32)min_address_range, (u32)max_address_range);
res = acpiphp_make_resource(min_address_range,
address_length);
if (!res) {
err("out of memory");
return;
}
res->next = bridge->bus_head;
bridge->bus_head = res;
break;
default:
/* invalid type */
break;
}
}
}
acpiphp_resource_sort_and_combine(&bridge->io_head);
acpiphp_resource_sort_and_combine(&bridge->mem_head);
acpiphp_resource_sort_and_combine(&bridge->p_mem_head);
acpiphp_resource_sort_and_combine(&bridge->bus_head);
#if 1
info("ACPI _CRS resource:");
acpiphp_dump_resource(bridge);
#endif
}
/* find pci_bus structure associated to specific bus number */
static struct pci_bus *find_pci_bus(const struct list_head *list, int bus)
{
const struct list_head *l;
list_for_each(l, list) {
struct pci_bus *b = pci_bus_b(l);
if (b->number == bus)
return b;
if (!list_empty(&b->children)) {
/* XXX recursive call */
b = find_pci_bus(&b->children, bus);
if (b)
return b;
}
}
return NULL;
}
/* decode ACPI 2.0 _HPP hot plug parameters */
static void decode_hpp(struct acpiphp_bridge *bridge)
{
acpi_status status;
acpi_buffer buffer = { .length = ACPI_ALLOCATE_BUFFER,
.pointer = NULL};
acpi_object *package;
int i;
/* default numbers */
bridge->hpp.cache_line_size = 0x10;
bridge->hpp.latency_timer = 0x40;
bridge->hpp.enable_SERR = 0;
bridge->hpp.enable_PERR = 0;
status = acpi_evaluate_object(bridge->handle, "_HPP", NULL, &buffer);
if (ACPI_FAILURE(status)) {
dbg("_HPP evaluation failed");
return;
}
package = (acpi_object *) buffer.pointer;
if (!package || package->type != ACPI_TYPE_PACKAGE ||
package->package.count != 4 || !package->package.elements) {
err("invalid _HPP object; ignoring");
goto err_exit;
}
for (i = 0; i < 4; i++) {
if (package->package.elements[i].type != ACPI_TYPE_INTEGER) {
err("invalid _HPP parameter type; ignoring");
goto err_exit;
}
}
bridge->hpp.cache_line_size = package->package.elements[0].integer.value;
bridge->hpp.latency_timer = package->package.elements[1].integer.value;
bridge->hpp.enable_SERR = package->package.elements[2].integer.value;
bridge->hpp.enable_PERR = package->package.elements[3].integer.value;
dbg("_HPP parameter = (%02x, %02x, %02x, %02x)",
bridge->hpp.cache_line_size,
bridge->hpp.latency_timer,
bridge->hpp.enable_SERR,
bridge->hpp.enable_PERR);
bridge->flags |= BRIDGE_HAS_HPP;
err_exit:
kfree(buffer.pointer);
}
/* initialize miscellaneous stuff for both root and PCI-to-PCI bridge */
static void init_bridge_misc (struct acpiphp_bridge *bridge)
{
acpi_status status;
/* decode ACPI 2.0 _HPP (hot plug parameters) */
decode_hpp(bridge);
/* subtract all resources already allocated */
acpiphp_detect_pci_resource(bridge);
/* register all slot objects under this bridge */
status = acpi_walk_namespace(ACPI_TYPE_DEVICE, bridge->handle, (u32)1,
register_slot, bridge, NULL);
/* install notify handler */
status = acpi_install_notify_handler(bridge->handle,
ACPI_SYSTEM_NOTIFY,
handle_hotplug_event_bridge,
bridge);
if (ACPI_FAILURE(status)) {
err("failed to register interrupt notify handler");
}
list_add(&bridge->list, &bridge_list);
#if 1
dbg("Bridge resource:");
acpiphp_dump_resource(bridge);
#endif
}
/* allocate and initialize host bridge data structure */
static void add_host_bridge (acpi_handle *handle, int seg, int bus)
{
acpi_status status;
acpi_buffer buffer = { .length = ACPI_ALLOCATE_BUFFER,
.pointer = NULL};
struct acpiphp_bridge *bridge;
bridge = kmalloc(sizeof(struct acpiphp_bridge), GFP_KERNEL);
if (bridge == NULL)
return;
memset(bridge, 0, sizeof(struct acpiphp_bridge));
bridge->type = BRIDGE_TYPE_HOST;
bridge->handle = handle;
bridge->seg = seg;
bridge->bus = bus;
bridge->pci_bus = find_pci_bus(&pci_root_buses, bus);
bridge->res_lock = SPIN_LOCK_UNLOCKED;
/* to be overridden when we decode _CRS */
bridge->sub = bridge->bus;
/* decode resources */
status = acpi_get_current_resources(handle, &buffer);
if (ACPI_FAILURE(status)) {
err("failed to decode bridge resources");
kfree(bridge);
return;
}
decode_acpi_resource(buffer.pointer, bridge);
kfree(buffer.pointer);
if (bridge->bus_head) {
bridge->bus = bridge->bus_head->base;
bridge->sub = bridge->bus_head->base + bridge->bus_head->length - 1;
}
init_bridge_misc(bridge);
}
/* allocate and initialize PCI-to-PCI bridge data structure */
static void add_p2p_bridge (acpi_handle *handle, int seg, int bus, int dev, int fn)
{
struct acpiphp_bridge *bridge;
u8 tmp8;
u16 tmp16;
u64 base64, limit64;
u32 base, limit, base32u, limit32u;
bridge = kmalloc(sizeof(struct acpiphp_bridge), GFP_KERNEL);
if (bridge == NULL) {
err("out of memory");
return;
}
memset(bridge, 0, sizeof(struct acpiphp_bridge));
bridge->type = BRIDGE_TYPE_P2P;
bridge->handle = handle;
bridge->seg = seg;
bridge->pci_dev = pci_find_slot(bus, PCI_DEVFN(dev, fn));
if (!bridge->pci_dev) {
err("Can't get pci_dev");
kfree(bridge);
return;
}
bridge->pci_bus = bridge->pci_dev->subordinate;
if (!bridge->pci_bus) {
err("This is not a PCI-to-PCI bridge!");
kfree(bridge);
return;
}
bridge->res_lock = SPIN_LOCK_UNLOCKED;
bridge->bus = bridge->pci_bus->number;
bridge->sub = bridge->pci_bus->subordinate;
/*
* decode resources under this P2P bridge
*/
/* I/O resources */
pci_read_config_byte(bridge->pci_dev, PCI_IO_BASE, &tmp8);
base = tmp8;
pci_read_config_byte(bridge->pci_dev, PCI_IO_LIMIT, &tmp8);
limit = tmp8;
switch (base & PCI_IO_RANGE_TYPE_MASK) {
case PCI_IO_RANGE_TYPE_16:
base = (base << 8) & 0xf000;
limit = ((limit << 8) & 0xf000) + 0xfff;
bridge->io_head = acpiphp_make_resource((u64)base, limit - base + 1);
if (!bridge->io_head) {
err("out of memory");
return;
}
dbg("16bit I/O range: %04x-%04x",
(u32)bridge->io_head->base,
(u32)(bridge->io_head->base + bridge->io_head->length - 1));
break;
case PCI_IO_RANGE_TYPE_32:
pci_read_config_word(bridge->pci_dev, PCI_IO_BASE_UPPER16, &tmp16);
base = ((u32)tmp16 << 16) | ((base << 8) & 0xf000);
pci_read_config_word(bridge->pci_dev, PCI_IO_LIMIT_UPPER16, &tmp16);
limit = (((u32)tmp16 << 16) | ((limit << 8) & 0xf000)) + 0xfff;
bridge->io_head = acpiphp_make_resource((u64)base, limit - base + 1);
if (!bridge->io_head) {
err("out of memory");
return;
}
dbg("32bit I/O range: %08x-%08x",
(u32)bridge->io_head->base,
(u32)(bridge->io_head->base + bridge->io_head->length - 1));
break;
case 0x0f:
dbg("I/O space unsupported");
break;
default:
warn("Unknown I/O range type");
}
/* Memory resources (mandatory for P2P bridge) */
pci_read_config_word(bridge->pci_dev, PCI_MEMORY_BASE, &tmp16);
base = (tmp16 & 0xfff0) << 16;
pci_read_config_word(bridge->pci_dev, PCI_MEMORY_LIMIT, &tmp16);
limit = ((tmp16 & 0xfff0) << 16) | 0xfffff;
bridge->mem_head = acpiphp_make_resource((u64)base, limit - base + 1);
if (!bridge->mem_head) {
err("out of memory");
return;
}
dbg("32bit Memory range: %08x-%08x",
(u32)bridge->mem_head->base,
(u32)(bridge->mem_head->base + bridge->mem_head->length-1));
/* Prefetchable Memory resources (optional) */
pci_read_config_word(bridge->pci_dev, PCI_PREF_MEMORY_BASE, &tmp16);
base = tmp16;
pci_read_config_word(bridge->pci_dev, PCI_PREF_MEMORY_LIMIT, &tmp16);
limit = tmp16;
switch (base & PCI_MEMORY_RANGE_TYPE_MASK) {
case PCI_PREF_RANGE_TYPE_32:
base = (base & 0xfff0) << 16;
limit = ((limit & 0xfff0) << 16) | 0xfffff;
bridge->p_mem_head = acpiphp_make_resource((u64)base, limit - base + 1);
if (!bridge->p_mem_head) {
err("out of memory");
return;
}
dbg("32bit Prefetchable memory range: %08x-%08x",
(u32)bridge->p_mem_head->base,
(u32)(bridge->p_mem_head->base + bridge->p_mem_head->length - 1));
break;
case PCI_PREF_RANGE_TYPE_64:
pci_read_config_dword(bridge->pci_dev, PCI_PREF_BASE_UPPER32, &base32u);
pci_read_config_dword(bridge->pci_dev, PCI_PREF_LIMIT_UPPER32, &limit32u);
base64 = ((u64)base32u << 32) | ((base & 0xfff0) << 16);
limit64 = (((u64)limit32u << 32) | ((limit & 0xfff0) << 16)) + 0xfffff;
bridge->p_mem_head = acpiphp_make_resource(base64, limit64 - base64 + 1);
if (!bridge->p_mem_head) {
err("out of memory");
return;
}
dbg("64bit Prefetchable memory range: %08x%08x-%08x%08x",
(u32)(bridge->p_mem_head->base >> 32),
(u32)(bridge->p_mem_head->base & 0xffffffff),
(u32)((bridge->p_mem_head->base + bridge->p_mem_head->length - 1) >> 32),
(u32)((bridge->p_mem_head->base + bridge->p_mem_head->length - 1) & 0xffffffff));
break;
case 0x0f:
break;
default:
warn("Unknown prefetchale memory type");
}
init_bridge_misc(bridge);
}
/* callback routine to find P2P bridges */
static acpi_status
find_p2p_bridge (acpi_handle handle, u32 lvl, void *context, void **rv)
{
acpi_status status;
acpi_handle dummy_handle;
unsigned long *segbus = context;
unsigned long tmp;
int seg, bus, device, function;
struct pci_dev *dev;
/* get PCI address */
seg = (*segbus >> 8) & 0xff;
bus = *segbus & 0xff;
status = acpi_get_handle(handle, "_ADR", &dummy_handle);
if (ACPI_FAILURE(status))
return AE_OK; /* continue */
status = acpi_evaluate_integer(handle, "_ADR", NULL, &tmp);
if (ACPI_FAILURE(status)) {
dbg("%s: _ADR evaluation failure", __FUNCTION__);
return AE_OK;
}
device = (tmp >> 16) & 0xffff;
function = tmp & 0xffff;
dev = pci_find_slot(bus, PCI_DEVFN(device, function));
if (!dev)
return AE_OK;
if (!dev->subordinate)
return AE_OK;
/* check if this bridge has ejectable slots */
if (detect_ejectable_slots(handle) > 0) {
dbg("found PCI-to-PCI bridge at PCI %02x:%02x.%d", bus, device, function);
add_p2p_bridge(handle, seg, bus, device, function);
}
return AE_OK;
}
/* find hot-pluggable slots, and then find P2P bridge */
static int add_bridges (acpi_handle *handle)
{
acpi_status status;
unsigned long tmp;
int seg, bus;
acpi_handle dummy_handle;
/* if the bridge doesn't have _STA, we assume it is always there */
status = acpi_get_handle(handle, "_STA", &dummy_handle);
if (ACPI_SUCCESS(status)) {
status = acpi_evaluate_integer(handle, "_STA", NULL, &tmp);
if (ACPI_FAILURE(status)) {
dbg("%s: _STA evaluation failure", __FUNCTION__);
return 0;
}
if ((tmp & ACPI_STA_FUNCTIONING) == 0)
/* don't register this object */
return 0;
}
/* get PCI segment number */
status = acpi_evaluate_integer(handle, "_SEG", NULL, &tmp);
seg = ACPI_SUCCESS(status) ? tmp : 0;
/* get PCI bus number */
status = acpi_evaluate_integer(handle, "_BBN", NULL, &tmp);
if (ACPI_SUCCESS(status)) {
bus = tmp;
} else {
warn("can't get bus number, assuming 0");
bus = 0;
}
/* check if this bridge has ejectable slots */
if (detect_ejectable_slots(handle) > 0) {
dbg("found PCI host-bus bridge with hot-pluggable slots");
add_host_bridge(handle, seg, bus);
return 0;
}
tmp = seg << 8 | bus;
/* search P2P bridges under this host bridge */
status = acpi_walk_namespace(ACPI_TYPE_DEVICE, handle, (u32)1,
find_p2p_bridge, &tmp, NULL);
if (ACPI_FAILURE(status))
warn("find_p2p_bridge faied (error code = 0x%x)",status);
return 0;
}
/* callback routine to enumerate all the bridges in ACPI namespace */
static acpi_status
find_host_bridge (acpi_handle handle, u32 lvl, void *context, void **rv)
{
acpi_status status;
acpi_device_info info;
char objname[5];
acpi_buffer buffer = { .length = sizeof(objname),
.pointer = objname };
status = acpi_get_object_info(handle, &info);
if (ACPI_FAILURE(status)) {
dbg("%s: failed to get bridge information", __FUNCTION__);
return AE_OK; /* continue */
}
info.hardware_id[sizeof(info.hardware_id)-1] = '\0';
/* TBD use acpi_get_devices() API */
if (info.current_status &&
(info.valid & ACPI_VALID_HID) &&
strcmp(info.hardware_id, ACPI_PCI_HOST_HID) == 0) {
acpi_get_name(handle, ACPI_SINGLE_NAME, &buffer);
dbg("checking PCI-hotplug capable bridges under [%s]", objname);
add_bridges(handle);
}
return AE_OK;
}
static int power_on_slot (struct acpiphp_slot *slot)
{
acpi_status status;
struct acpiphp_func *func;
struct list_head *l;
int retval = 0;
/* is this already enabled? */
if (slot->flags & SLOT_POWEREDON)
goto err_exit;
list_for_each(l, &slot->funcs) {
func = list_entry(l, struct acpiphp_func, sibling);
if (func->flags & FUNC_HAS_PS0) {
dbg("%s: executing _PS0 on %02x:%02x.%d", __FUNCTION__,
slot->bridge->bus, slot->device, func->function);
status = acpi_evaluate_object(func->handle, "_PS0", NULL, NULL);
if (ACPI_FAILURE(status)) {
warn("%s: _PS0 failed", __FUNCTION__);
retval = -1;
goto err_exit;
}
}
}
/* TBD: evaluate _STA to check if the slot is enabled */
slot->flags |= SLOT_POWEREDON;
err_exit:
return retval;
}
static int power_off_slot (struct acpiphp_slot *slot)
{
acpi_status status;
struct acpiphp_func *func;
struct list_head *l;
acpi_object_list arg_list;
acpi_object arg;
int retval = 0;
/* is this already enabled? */
if ((slot->flags & SLOT_POWEREDON) == 0)
goto err_exit;
list_for_each(l, &slot->funcs) {
func = list_entry(l, struct acpiphp_func, sibling);
if (func->flags & FUNC_HAS_PS3) {
dbg("%s: executing _PS3 on %02x:%02x.%d", __FUNCTION__,
slot->bridge->bus, slot->device, func->function);
status = acpi_evaluate_object(func->handle, "_PS3", NULL, NULL);
if (ACPI_FAILURE(status)) {
warn("%s: _PS3 failed", __FUNCTION__);
retval = -1;
goto err_exit;
}
}
}
list_for_each(l, &slot->funcs) {
func = list_entry(l, struct acpiphp_func, sibling);
if (func->flags & FUNC_HAS_EJ0) {
dbg("%s: executing _EJ0 on %02x:%02x.%d", __FUNCTION__,
slot->bridge->bus, slot->device, func->function);
/* _EJ0 method take one argument */
arg_list.count = 1;
arg_list.pointer = &arg;
arg.type = ACPI_TYPE_INTEGER;
arg.integer.value = 1;
status = acpi_evaluate_object(func->handle, "_EJ0", &arg_list, NULL);
if (ACPI_FAILURE(status)) {
warn("%s: _EJ0 failed", __FUNCTION__);
retval = -1;
goto err_exit;
}
}
}
/* TBD: evaluate _STA to check if the slot is disabled */
slot->flags &= (~SLOT_POWEREDON);
err_exit:
return retval;
}
/**
* enable_device - enable, configure a slot
* @slot: slot to be enabled
*
* This function should be called per *physical slot*,
* not per each slot object in ACPI namespace.
*
*/
static int enable_device (struct acpiphp_slot *slot)
{
u8 bus;
struct pci_dev dev0, *dev;
struct pci_bus *child;
struct list_head *l;
struct acpiphp_func *func;
int retval = 0;
if (slot->flags & SLOT_ENABLED)
goto err_exit;
/* sanity check: dev should be NULL when hot-plugged in */
dev = pci_find_slot(slot->bridge->bus, PCI_DEVFN(slot->device, 0));
if (dev) {
/* This case shouldn't happen */
err("pci_dev structure already exists.");
retval = -1;
goto err_exit;
}
/* allocate resources to device */
retval = acpiphp_configure_slot(slot);
if (retval)
goto err_exit;
memset(&dev0, 0, sizeof (struct pci_dev));
dev0.bus = slot->bridge->pci_bus;
dev0.devfn = PCI_DEVFN(slot->device, 0);
dev0.sysdata = dev0.bus->sysdata;
dev0.dev.parent = dev0.bus->dev;
dev0.dev.bus = &pci_bus_type;
/* returned `dev' is the *first function* only! */
dev = pci_scan_slot (&dev0);
if (!dev) {
err("No new device found");
retval = -1;
goto err_exit;
}
if (dev->hdr_type == PCI_HEADER_TYPE_BRIDGE) {
pci_read_config_byte(dev, PCI_SECONDARY_BUS, &bus);
child = (struct pci_bus*) pci_add_new_bus(dev->bus, dev, bus);
pci_do_scan_bus(child);
}
/* associate pci_dev to our representation */
list_for_each(l, &slot->funcs) {
func = list_entry(l, struct acpiphp_func, sibling);
func->pci_dev = pci_find_slot(slot->bridge->bus,
PCI_DEVFN(slot->device,
func->function));
if (!func->pci_dev)
continue;
/* configure device */
retval = acpiphp_configure_function(func);
if (retval)
goto err_exit;
}
slot->flags |= SLOT_ENABLED;
#if 1
dbg("Available resources:");
acpiphp_dump_resource(slot->bridge);
#endif
err_exit:
return retval;
}
/**
* disable_device - disable a slot
*/
static int disable_device (struct acpiphp_slot *slot)
{
int retval = 0;
struct acpiphp_func *func;
struct list_head *l;
/* is this slot already disabled? */
if (!(slot->flags & SLOT_ENABLED))
goto err_exit;
list_for_each(l, &slot->funcs) {
func = list_entry(l, struct acpiphp_func, sibling);
if (func->pci_dev) {
if (acpiphp_unconfigure_function(func) == 0) {
func->pci_dev = NULL;
} else {
err("failed to unconfigure device");
retval = -1;
goto err_exit;
}
}
}
slot->flags &= (~SLOT_ENABLED);
err_exit:
return retval;
}
/**
* get_slot_status - get ACPI slot status
*
* if a slot has _STA for each function and if any one of them
* returned non-zero status, return it
*
* if a slot doesn't have _STA and if any one of its functions'
* configuration space is configured, return 0x0f as a _STA
*
* otherwise return 0
*/
static unsigned int get_slot_status (struct acpiphp_slot *slot)
{
acpi_status status;
unsigned long sta = 0;
u32 dvid;
struct list_head *l;
struct acpiphp_func *func;
list_for_each(l, &slot->funcs) {
func = list_entry(l, struct acpiphp_func, sibling);
if (func->flags & FUNC_HAS_STA) {
status = acpi_evaluate_integer(func->handle, "_STA", NULL, &sta);
if (ACPI_SUCCESS(status) && sta)
break;
} else {
pci_bus_read_config_dword(slot->bridge->pci_bus,
PCI_DEVFN(slot->device,
func->function),
PCI_VENDOR_ID, &dvid);
if (dvid != 0xffffffff) {
sta = ACPI_STA_ALL;
break;
}
}
}
return (unsigned int)sta;
}
/*
* ACPI event handlers
*/
/**
* handle_hotplug_event_bridge - handle ACPI event on bridges
*
* @handle: Notify()'ed acpi_handle
* @type: Notify code
* @context: pointer to acpiphp_bridge structure
*
* handles ACPI event notification on {host,p2p} bridges
*
*/
static void handle_hotplug_event_bridge (acpi_handle handle, u32 type, void *context)
{
struct acpiphp_bridge *bridge;
char objname[64];
acpi_buffer buffer = { .length = sizeof(objname),
.pointer = objname };
bridge = (struct acpiphp_bridge *)context;
acpi_get_name(handle, ACPI_FULL_PATHNAME, &buffer);
switch (type) {
case ACPI_NOTIFY_BUS_CHECK:
/* bus re-enumerate */
dbg("%s: Bus check notify on %s", __FUNCTION__, objname);
acpiphp_check_bridge(bridge);
break;
case ACPI_NOTIFY_DEVICE_CHECK:
/* device check */
dbg("%s: Device check notify on %s", __FUNCTION__, objname);
acpiphp_check_bridge(bridge);
break;
case ACPI_NOTIFY_DEVICE_WAKE:
/* wake event */
dbg("%s: Device wake notify on %s", __FUNCTION__, objname);
break;
case ACPI_NOTIFY_EJECT_REQUEST:
/* request device eject */
dbg("%s: Device eject notify on %s", __FUNCTION__, objname);
break;
default:
warn("notify_handler: unknown event type 0x%x for %s", type, objname);
break;
}
}
/**
* handle_hotplug_event_func - handle ACPI event on functions (i.e. slots)
*
* @handle: Notify()'ed acpi_handle
* @type: Notify code
* @context: pointer to acpiphp_func structure
*
* handles ACPI event notification on slots
*
*/
static void handle_hotplug_event_func (acpi_handle handle, u32 type, void *context)
{
struct acpiphp_func *func;
char objname[64];
acpi_buffer buffer = { .length = sizeof(objname),
.pointer = objname };
acpi_get_name(handle, ACPI_FULL_PATHNAME, &buffer);
func = (struct acpiphp_func *)context;
switch (type) {
case ACPI_NOTIFY_BUS_CHECK:
/* bus re-enumerate */
dbg("%s: Bus check notify on %s", __FUNCTION__, objname);
acpiphp_enable_slot(func->slot);
break;
case ACPI_NOTIFY_DEVICE_CHECK:
/* device check : re-enumerate from parent bus */
dbg("%s: Device check notify on %s", __FUNCTION__, objname);
acpiphp_check_bridge(func->slot->bridge);
break;
case ACPI_NOTIFY_DEVICE_WAKE:
/* wake event */
dbg("%s: Device wake notify on %s", __FUNCTION__, objname);
break;
case ACPI_NOTIFY_EJECT_REQUEST:
/* request device eject */
dbg("%s: Device eject notify on %s", __FUNCTION__, objname);
acpiphp_disable_slot(func->slot);
break;
default:
warn("notify_handler: unknown event type 0x%x for %s", type, objname);
break;
}
}
/**
* acpiphp_glue_init - initializes all PCI hotplug - ACPI glue data structures
*
*/
int acpiphp_glue_init (void)
{
acpi_status status;
if (list_empty(&pci_root_buses))
return -1;
status = acpi_walk_namespace(ACPI_TYPE_DEVICE, ACPI_ROOT_OBJECT,
ACPI_UINT32_MAX, find_host_bridge,
NULL, NULL);
if (ACPI_FAILURE(status)) {
err("%s: acpi_walk_namespace() failed", __FUNCTION__);
return -1;
}
return 0;
}
/**
* acpiphp_glue_exit - terminates all PCI hotplug - ACPI glue data structures
*
* This function frees all data allocated in acpiphp_glue_init()
*/
void acpiphp_glue_exit (void)
{
struct list_head *l1, *l2, *n1, *n2;
struct acpiphp_bridge *bridge;
struct acpiphp_slot *slot, *next;
struct acpiphp_func *func;
acpi_status status;
list_for_each_safe(l1, n1, &bridge_list) {
bridge = (struct acpiphp_bridge *)l1;
slot = bridge->slots;
while (slot) {
next = slot->next;
list_for_each_safe(l2, n2, &slot->funcs) {
func = list_entry(l2, struct acpiphp_func, sibling);
acpiphp_free_resource(&func->io_head);
acpiphp_free_resource(&func->mem_head);
acpiphp_free_resource(&func->p_mem_head);
acpiphp_free_resource(&func->bus_head);
status = acpi_remove_notify_handler(func->handle,
ACPI_SYSTEM_NOTIFY,
handle_hotplug_event_func);
if (ACPI_FAILURE(status))
err("failed to remove notify handler");
kfree(func);
}
kfree(slot);
slot = next;
}
status = acpi_remove_notify_handler(bridge->handle, ACPI_SYSTEM_NOTIFY,
handle_hotplug_event_bridge);
if (ACPI_FAILURE(status))
err("failed to remove notify handler");
acpiphp_free_resource(&bridge->io_head);
acpiphp_free_resource(&bridge->mem_head);
acpiphp_free_resource(&bridge->p_mem_head);
acpiphp_free_resource(&bridge->bus_head);
kfree(bridge);
}
}
/**
* acpiphp_get_num_slots - count number of slots in a system
*/
int acpiphp_get_num_slots (void)
{
struct list_head *node;
struct acpiphp_bridge *bridge;
int num_slots;
num_slots = 0;
list_for_each(node, &bridge_list) {
bridge = (struct acpiphp_bridge *)node;
dbg("Bus%d %dslot(s)", bridge->bus, bridge->nr_slots);
num_slots += bridge->nr_slots;
}
dbg("Total %dslots", num_slots);
return num_slots;
}
/**
* acpiphp_for_each_slot - call function for each slot
* @fn: callback function
* @data: context to be passed to callback function
*
*/
int acpiphp_for_each_slot(acpiphp_callback fn, void *data)
{
struct list_head *node;
struct acpiphp_bridge *bridge;
struct acpiphp_slot *slot;
int retval = 0;
list_for_each(node, &bridge_list) {
bridge = (struct acpiphp_bridge *)node;
for (slot = bridge->slots; slot; slot = slot->next) {
retval = fn(slot, data);
if (!retval)
goto err_exit;
}
}
err_exit:
return retval;
}
/* search matching slot from id */
struct acpiphp_slot *get_slot_from_id (int id)
{
struct list_head *node;
struct acpiphp_bridge *bridge;
struct acpiphp_slot *slot;
list_for_each(node, &bridge_list) {
bridge = (struct acpiphp_bridge *)node;
for (slot = bridge->slots; slot; slot = slot->next)
if (slot->id == id)
return slot;
}
/* should never happen! */
err("%s: no object for id %d",__FUNCTION__, id);
return 0;
}
/**
* acpiphp_enable_slot - power on slot
*/
int acpiphp_enable_slot (struct acpiphp_slot *slot)
{
int retval;
down(&slot->crit_sect);
/* wake up all functions */
retval = power_on_slot(slot);
if (retval)
goto err_exit;
if (get_slot_status(slot) == ACPI_STA_ALL)
/* configure all functions */
retval = enable_device(slot);
err_exit:
up(&slot->crit_sect);
return retval;
}
/**
* acpiphp_disable_slot - power off slot
*/
int acpiphp_disable_slot (struct acpiphp_slot *slot)
{
int retval = 0;
down(&slot->crit_sect);
/* unconfigure all functions */
retval = disable_device(slot);
if (retval)
goto err_exit;
/* power off all functions */
retval = power_off_slot(slot);
if (retval)
goto err_exit;
acpiphp_resource_sort_and_combine(&slot->bridge->io_head);
acpiphp_resource_sort_and_combine(&slot->bridge->mem_head);
acpiphp_resource_sort_and_combine(&slot->bridge->p_mem_head);
acpiphp_resource_sort_and_combine(&slot->bridge->bus_head);
dbg("Available resources:");
acpiphp_dump_resource(slot->bridge);
err_exit:
up(&slot->crit_sect);
return retval;
}
/**
* acpiphp_check_bridge - re-enumerate devices
*/
int acpiphp_check_bridge (struct acpiphp_bridge *bridge)
{
struct acpiphp_slot *slot;
unsigned int sta;
int retval = 0;
int enabled, disabled;
enabled = disabled = 0;
for (slot = bridge->slots; slot; slot = slot->next) {
sta = get_slot_status(slot);
if (slot->flags & SLOT_ENABLED) {
/* if enabled but not present, disable */
if (sta != ACPI_STA_ALL) {
retval = acpiphp_disable_slot(slot);
if (retval) {
err("Error occured in enabling");
up(&slot->crit_sect);
goto err_exit;
}
enabled++;
}
} else {
/* if disabled but present, enable */
if (sta == ACPI_STA_ALL) {
retval = acpiphp_enable_slot(slot);
if (retval) {
err("Error occured in enabling");
up(&slot->crit_sect);
goto err_exit;
}
disabled++;
}
}
}
dbg("%s: %d enabled, %d disabled", __FUNCTION__, enabled, disabled);
err_exit:
return retval;
}
/*
* slot enabled: 1
* slot disabled: 0
*/
u8 acpiphp_get_power_status (struct acpiphp_slot *slot)
{
unsigned int sta;
sta = get_slot_status(slot);
return (sta & ACPI_STA_ENABLED) ? 1 : 0;
}
/*
* attention LED ON: 1
* OFF: 0
*
* TBD
* no direct attention led status information via ACPI
*
*/
u8 acpiphp_get_attention_status (struct acpiphp_slot *slot)
{
return 0;
}
/*
* latch closed: 1
* latch open: 0
*/
u8 acpiphp_get_latch_status (struct acpiphp_slot *slot)
{
unsigned int sta;
sta = get_slot_status(slot);
return (sta & ACPI_STA_SHOW_IN_UI) ? 1 : 0;
}
/*
* adapter presence : 1
* absence : 0
*/
u8 acpiphp_get_adapter_status (struct acpiphp_slot *slot)
{
unsigned int sta;
sta = get_slot_status(slot);
return (sta == 0) ? 0 : 1;
}
drivers/hotplug/acpiphp_pci.c 0 → 100644
View file @ 41702685
/*
* ACPI PCI HotPlug PCI configuration space management
*
* Copyright (c) 1995,2001 Compaq Computer Corporation
* Copyright (c) 2001 Greg Kroah-Hartman (greg@kroah.com)
* Copyright (c) 2001,2002 IBM Corp.
* Copyright (c) 2002 Takayoshi Kochi (t-kouchi@cq.jp.nec.com)
* Copyright (c) 2002 Hiroshi Aono (h-aono@ap.jp.nec.com)
* Copyright (c) 2002 NEC Corporation
*
* 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 <t-kouchi@cq.jp.nec.com>
*
*/
#include <linux/config.h>
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/pci.h>
#include <linux/init.h>
#include <linux/acpi.h>
#include "pci_hotplug.h"
#include "acpiphp.h"
#define MY_NAME "acpiphp_pci"
/* allocate mem/pmem/io resource to a new function */
static int init_config_space (struct acpiphp_func *func)
{
u32 bar, len;
u32 address[] = {
PCI_BASE_ADDRESS_0,
PCI_BASE_ADDRESS_1,
PCI_BASE_ADDRESS_2,
PCI_BASE_ADDRESS_3,
PCI_BASE_ADDRESS_4,
PCI_BASE_ADDRESS_5,
0
};
int count;
struct acpiphp_bridge *bridge;
struct pci_resource *res;
struct pci_bus *pbus;
int bus, device, function;
unsigned int devfn;
u16 tmp;
bridge = func->slot->bridge;
pbus = bridge->pci_bus;
bus = bridge->bus;
device = func->slot->device;
function = func->function;
devfn = PCI_DEVFN(device, function);
for (count = 0; address[count]; count++) { /* for 6 BARs */
pci_bus_write_config_dword(pbus, devfn,
address[count], 0xFFFFFFFF);
pci_bus_read_config_dword(pbus, devfn, address[count], &bar);
if (!bar) /* This BAR is not implemented */
continue;
dbg("Device %02x.%02x BAR %d wants %x", device, function, count, bar);
if (bar & PCI_BASE_ADDRESS_SPACE_IO) {
/* This is IO */
len = bar & 0xFFFFFFFC;
len = ~len + 1;
dbg ("len in IO %x, BAR %d", len, count);
spin_lock(&bridge->res_lock);
res = acpiphp_get_io_resource(&bridge->io_head, len);
spin_unlock(&bridge->res_lock);
if (!res) {
err("cannot allocate requested io for %02x:%02x.%d len %x\n",
bus, device, function, len);
return -1;
}
pci_bus_write_config_dword(pbus, devfn,
address[count],
(u32)res->base);
res->next = func->io_head;
func->io_head = res;
} else {
/* This is Memory */
if (bar & PCI_BASE_ADDRESS_MEM_PREFETCH) {
/* pfmem */
len = bar & 0xFFFFFFF0;
len = ~len + 1;
dbg("len in PFMEM %x, BAR %d", len, count);
spin_lock(&bridge->res_lock);
res = acpiphp_get_resource(&bridge->p_mem_head, len);
spin_unlock(&bridge->res_lock);
if (!res) {
err("cannot allocate requested pfmem for %02x:%02x.%d len %x\n",
bus, device, function, len);
return -1;
}
pci_bus_write_config_dword(pbus, devfn,
address[count],
(u32)res->base);
if (bar & PCI_BASE_ADDRESS_MEM_TYPE_64) { /* takes up another dword */
dbg ("inside the pfmem 64 case, count %d", count);
count += 1;
pci_bus_write_config_dword(pbus, devfn,
address[count],
(u32)(res->base >> 32));
}
res->next = func->p_mem_head;
func->p_mem_head = res;
} else {
/* regular memory */
len = bar & 0xFFFFFFF0;
len = ~len + 1;
dbg("len in MEM %x, BAR %d", len, count);
spin_lock(&bridge->res_lock);
res = acpiphp_get_resource(&bridge->mem_head, len);
spin_unlock(&bridge->res_lock);
if (!res) {
err("cannot allocate requested pfmem for %02x:%02x.%d len %x\n",
bus, device, function, len);
return -1;
}
pci_bus_write_config_dword(pbus, devfn,
address[count],
(u32)res->base);
if (bar & PCI_BASE_ADDRESS_MEM_TYPE_64) {
/* takes up another dword */
dbg ("inside mem 64 case, reg. mem, count %d", count);
count += 1;
pci_bus_write_config_dword(pbus, devfn,
address[count],
(u32)(res->base >> 32));
}
res->next = func->mem_head;
func->mem_head = res;
}
}
}
/* disable expansion rom */
pci_bus_write_config_dword(pbus, devfn, PCI_ROM_ADDRESS, 0x00000000);
/* set PCI parameters from _HPP */
pci_bus_write_config_byte(pbus, devfn, PCI_CACHE_LINE_SIZE,
bridge->hpp.cache_line_size);
pci_bus_write_config_byte(pbus, devfn, PCI_LATENCY_TIMER,
bridge->hpp.latency_timer);
pci_bus_read_config_word(pbus, devfn, PCI_COMMAND, &tmp);
if (bridge->hpp.enable_SERR)
tmp |= PCI_COMMAND_SERR;
if (bridge->hpp.enable_PERR)
tmp |= PCI_COMMAND_PARITY;
pci_bus_write_config_word(pbus, devfn, PCI_COMMAND, tmp);
return 0;
}
/* enable pci_dev */
static int configure_pci_dev (struct pci_dev_wrapped *wrapped_dev, struct pci_bus_wrapped *wrapped_bus)
{
struct acpiphp_func *func;
struct acpiphp_bridge *bridge;
struct pci_dev *dev;
func = (struct acpiphp_func *)wrapped_dev->data;
bridge = (struct acpiphp_bridge *)wrapped_bus->data;
dev = wrapped_dev->dev;
/* TBD: support PCI-to-PCI bridge case */
if (!func || !bridge)
return 0;
//pci_proc_attach_device(dev);
//pci_announce_device_to_drivers(dev);
info("Device %s configured", dev->slot_name);
return 0;
}
static int is_pci_dev_in_use (struct pci_dev* dev)
{
/*
* dev->driver will be set if the device is in use by a new-style
* driver -- otherwise, check the device's regions to see if any
* driver has claimed them
*/
int i, inuse=0;
if (dev->driver) return 1; //assume driver feels responsible
for (i = 0; !dev->driver && !inuse && (i < 6); i++) {
if (!pci_resource_start(dev, i))
continue;
if (pci_resource_flags(dev, i) & IORESOURCE_IO)
inuse = check_region(pci_resource_start(dev, i),
pci_resource_len(dev, i));
else if (pci_resource_flags(dev, i) & IORESOURCE_MEM)
inuse = check_mem_region(pci_resource_start(dev, i),
pci_resource_len(dev, i));
}
return inuse;
}
static int pci_hp_remove_device (struct pci_dev *dev)
{
if (is_pci_dev_in_use(dev)) {
err("***Cannot safely power down device -- "
"it appears to be in use***\n");
return -EBUSY;
}
pci_remove_device(dev);
return 0;
}
/* remove device driver */
static int unconfigure_pci_dev_driver (struct pci_dev_wrapped *wrapped_dev, struct pci_bus_wrapped *wrapped_bus)
{
struct pci_dev *dev = wrapped_dev->dev;
dbg("attempting removal of driver for device %s", dev->slot_name);
/* Now, remove the Linux Driver Representation */
if (dev->driver) {
if (dev->driver->remove) {
dev->driver->remove(dev);
dbg("driver was properly removed");
}
dev->driver = NULL;
}
return is_pci_dev_in_use(dev);
}
/* remove pci_dev itself from system */
static int unconfigure_pci_dev (struct pci_dev_wrapped *wrapped_dev, struct pci_bus_wrapped *wrapped_bus)
{
struct pci_dev *dev = wrapped_dev->dev;
/* Now, remove the Linux Representation */
if (dev) {
if (pci_hp_remove_device(dev) == 0) {
info("Device %s removed", dev->slot_name);
kfree(dev); /* Now, remove */
} else {
return -1; /* problems while freeing, abort visitation */
}
}
return 0;
}
/* remove pci_bus itself from system */
static int unconfigure_pci_bus (struct pci_bus_wrapped *wrapped_bus, struct pci_dev_wrapped *wrapped_dev)
{
struct pci_bus *bus = wrapped_bus->bus;
#ifdef CONFIG_PROC_FS
/* Now, remove the Linux Representation */
if (bus->procdir) {
pci_proc_detach_bus(bus);
}
#endif
/* the cleanup code should live in the kernel ... */
bus->self->subordinate = NULL;
/* unlink from parent bus */
list_del(&bus->node);
/* Now, remove */
if (bus)
kfree(bus);
return 0;
}
/* detect_used_resource - subtract resource under dev from bridge */
static int detect_used_resource (struct acpiphp_bridge *bridge, struct pci_dev *dev)
{
u32 bar, len;
u64 base;
u32 address[] = {
PCI_BASE_ADDRESS_0,
PCI_BASE_ADDRESS_1,
PCI_BASE_ADDRESS_2,
PCI_BASE_ADDRESS_3,
PCI_BASE_ADDRESS_4,
PCI_BASE_ADDRESS_5,
0
};
int count;
struct pci_resource *res;
dbg("Device %s", dev->slot_name);
for (count = 0; address[count]; count++) { /* for 6 BARs */
pci_read_config_dword(dev, address[count], &bar);
if (!bar) /* This BAR is not implemented */
continue;
pci_write_config_dword(dev, address[count], 0xFFFFFFFF);
pci_read_config_dword(dev, address[count], &len);
if (len & PCI_BASE_ADDRESS_SPACE_IO) {
/* This is IO */
base = bar & 0xFFFFFFFC;
len &= 0xFFFFFFFC;
len = ~len + 1;
dbg("BAR[%d] %08x - %08x (IO)", count, (u32)base, (u32)base + len - 1);
spin_lock(&bridge->res_lock);
res = acpiphp_get_resource_with_base(&bridge->io_head, base, len);
spin_unlock(&bridge->res_lock);
if (res)
kfree(res);
} else {
/* This is Memory */
base = bar & 0xFFFFFFF0;
if (len & PCI_BASE_ADDRESS_MEM_PREFETCH) {
/* pfmem */
len &= 0xFFFFFFF0;
len = ~len + 1;
if (len & PCI_BASE_ADDRESS_MEM_TYPE_64) { /* takes up another dword */
dbg ("prefetch mem 64");
count += 1;
}
dbg("BAR[%d] %08x - %08x (PMEM)", count, (u32)base, (u32)base + len - 1);
spin_lock(&bridge->res_lock);
res = acpiphp_get_resource_with_base(&bridge->p_mem_head, base, len);
spin_unlock(&bridge->res_lock);
if (res)
kfree(res);
} else {
/* regular memory */
len &= 0xFFFFFFF0;
len = ~len + 1;
if (len & PCI_BASE_ADDRESS_MEM_TYPE_64) {
/* takes up another dword */
dbg ("mem 64");
count += 1;
}
dbg("BAR[%d] %08x - %08x (MEM)", count, (u32)base, (u32)base + len - 1);
spin_lock(&bridge->res_lock);
res = acpiphp_get_resource_with_base(&bridge->mem_head, base, len);
spin_unlock(&bridge->res_lock);
if (res)
kfree(res);
}
}
pci_write_config_dword(dev, address[count], bar);
}
return 0;
}
/* detect_pci_resource_bus - subtract resource under pci_bus */
static void detect_used_resource_bus(struct acpiphp_bridge *bridge, struct pci_bus *bus)
{
struct list_head *l;
struct pci_dev *dev;
list_for_each(l, &bus->devices) {
dev = pci_dev_b(l);
detect_used_resource(bridge, dev);
/* XXX recursive call */
if (dev->subordinate)
detect_used_resource_bus(bridge, dev->subordinate);
}
}
/**
* acpiphp_detect_pci_resource - detect resources under bridge
* @bridge: detect all resources already used under this bridge
*
* collect all resources already allocated for all devices under a bridge.
*/
int acpiphp_detect_pci_resource (struct acpiphp_bridge *bridge)
{
detect_used_resource_bus(bridge, bridge->pci_bus);
return 0;
}
/**
* acpiphp_init_slot_resource - gather resource usage information of a slot
* @slot: ACPI slot object to be checked, should have valid pci_dev member
*
* TBD: PCI-to-PCI bridge case
* use pci_dev->resource[]
*/
int acpiphp_init_func_resource (struct acpiphp_func *func)
{
u64 base;
u32 bar, len;
u32 address[] = {
PCI_BASE_ADDRESS_0,
PCI_BASE_ADDRESS_1,
PCI_BASE_ADDRESS_2,
PCI_BASE_ADDRESS_3,
PCI_BASE_ADDRESS_4,
PCI_BASE_ADDRESS_5,
0
};
int count;
struct pci_resource *res;
struct pci_dev *dev;
dev = func->pci_dev;
dbg("Hot-pluggable device %s", dev->slot_name);
for (count = 0; address[count]; count++) { /* for 6 BARs */
pci_read_config_dword (dev, address[count], &bar);
if (!bar) /* This BAR is not implemented */
continue;
pci_write_config_dword (dev, address[count], 0xFFFFFFFF);
pci_read_config_dword (dev, address[count], &len);
if (len & PCI_BASE_ADDRESS_SPACE_IO) {
/* This is IO */
base = bar & 0xFFFFFFFC;
len &= 0xFFFFFFFC;
len = ~len + 1;
dbg("BAR[%d] %08x - %08x (IO)", count, (u32)base, (u32)base + len - 1);
res = acpiphp_make_resource(base, len);
if (!res)
goto no_memory;
res->next = func->io_head;
func->io_head = res;
} else {
/* This is Memory */
base = bar & 0xFFFFFFF0;
if (len & PCI_BASE_ADDRESS_MEM_PREFETCH) {
/* pfmem */
len &= 0xFFFFFFF0;
len = ~len + 1;
if (len & PCI_BASE_ADDRESS_MEM_TYPE_64) { /* takes up another dword */
dbg ("prefetch mem 64");
count += 1;
}
dbg("BAR[%d] %08x - %08x (PMEM)", count, (u32)base, (u32)base + len - 1);
res = acpiphp_make_resource(base, len);
if (!res)
goto no_memory;
res->next = func->p_mem_head;
func->p_mem_head = res;
} else {
/* regular memory */
len &= 0xFFFFFFF0;
len = ~len + 1;
if (len & PCI_BASE_ADDRESS_MEM_TYPE_64) {
/* takes up another dword */
dbg ("mem 64");
count += 1;
}
dbg("BAR[%d] %08x - %08x (MEM)", count, (u32)base, (u32)base + len - 1);
res = acpiphp_make_resource(base, len);
if (!res)
goto no_memory;
res->next = func->mem_head;
func->mem_head = res;
}
}
pci_write_config_dword (dev, address[count], bar);
}
#if 1
acpiphp_dump_func_resource(func);
#endif
return 0;
no_memory:
err("out of memory");
acpiphp_free_resource(&func->io_head);
acpiphp_free_resource(&func->mem_head);
acpiphp_free_resource(&func->p_mem_head);
return -1;
}
/**
* acpiphp_configure_slot - allocate PCI resources
* @slot: slot to be configured
*
* initializes a PCI functions on a device inserted
* into the slot
*
*/
int acpiphp_configure_slot (struct acpiphp_slot *slot)
{
struct acpiphp_func *func;
struct list_head *l;
u8 hdr;
u32 dvid;
int retval = 0;
int is_multi = 0;
pci_bus_read_config_byte(slot->bridge->pci_bus,
PCI_DEVFN(slot->device, 0),
PCI_HEADER_TYPE, &hdr);
if (hdr & 0x80)
is_multi = 1;
list_for_each(l, &slot->funcs) {
func = list_entry(l, struct acpiphp_func, sibling);
if (is_multi || func->function == 0) {
pci_bus_read_config_dword(slot->bridge->pci_bus,
PCI_DEVFN(slot->device,
func->function),
PCI_VENDOR_ID, &dvid);
if (dvid != 0xffffffff) {
retval = init_config_space(func);
if (retval)
break;
}
}
}
return retval;
}
/* for pci_visit_dev() */
static struct pci_visit configure_functions = {
.post_visit_pci_dev = configure_pci_dev
};
static struct pci_visit unconfigure_functions_phase1 = {
.post_visit_pci_dev = unconfigure_pci_dev_driver
};
static struct pci_visit unconfigure_functions_phase2 = {
.post_visit_pci_bus = unconfigure_pci_bus,
.post_visit_pci_dev = unconfigure_pci_dev
};
/**
* acpiphp_configure_function - configure PCI function
* @func: function to be configured
*
* initializes a PCI functions on a device inserted
* into the slot
*
*/
int acpiphp_configure_function (struct acpiphp_func *func)
{
int retval = 0;
struct pci_dev_wrapped wrapped_dev;
struct pci_bus_wrapped wrapped_bus;
struct acpiphp_bridge *bridge;
/* if pci_dev is NULL, ignore it */
if (!func->pci_dev)
goto err_exit;
bridge = func->slot->bridge;
memset(&wrapped_dev, 0, sizeof(struct pci_dev_wrapped));
memset(&wrapped_bus, 0, sizeof(struct pci_bus_wrapped));
wrapped_dev.dev = func->pci_dev;
wrapped_dev.data = func;
wrapped_bus.bus = bridge->pci_bus;
wrapped_bus.data = bridge;
retval = pci_visit_dev(&configure_functions, &wrapped_dev, &wrapped_bus);
if (retval)
goto err_exit;
err_exit:
return retval;
}
/**
* acpiphp_unconfigure_function - unconfigure PCI function
* @func: function to be unconfigured
*
*/
int acpiphp_unconfigure_function (struct acpiphp_func *func)
{
struct acpiphp_bridge *bridge;
struct pci_dev_wrapped wrapped_dev;
struct pci_bus_wrapped wrapped_bus;
int retval = 0;
/* if pci_dev is NULL, ignore it */
if (!func->pci_dev)
goto err_exit;
memset(&wrapped_dev, 0, sizeof(struct pci_dev_wrapped));
memset(&wrapped_bus, 0, sizeof(struct pci_bus_wrapped));
wrapped_dev.dev = func->pci_dev;
//wrapped_dev.data = func;
wrapped_bus.bus = func->slot->bridge->pci_bus;
//wrapped_bus.data = func->slot->bridge;
retval = pci_visit_dev(&unconfigure_functions_phase1, &wrapped_dev, &wrapped_bus);
if (retval)
goto err_exit;
retval = pci_visit_dev(&unconfigure_functions_phase2, &wrapped_dev, &wrapped_bus);
if (retval)
goto err_exit;
/* free all resources */
bridge = func->slot->bridge;
spin_lock(&bridge->res_lock);
acpiphp_move_resource(&func->io_head, &bridge->io_head);
acpiphp_move_resource(&func->mem_head, &bridge->mem_head);
acpiphp_move_resource(&func->p_mem_head, &bridge->p_mem_head);
acpiphp_move_resource(&func->bus_head, &bridge->bus_head);
spin_unlock(&bridge->res_lock);
err_exit:
return retval;
}
drivers/hotplug/acpiphp_res.c 0 → 100644
View file @ 41702685
/*
* ACPI PCI HotPlug Utility functions
*
* Copyright (c) 1995,2001 Compaq Computer Corporation
* Copyright (c) 2001 Greg Kroah-Hartman (greg@kroah.com)
* Copyright (c) 2001 IBM Corp.
* Copyright (c) 2002 Hiroshi Aono (h-aono@ap.jp.nec.com)
* Copyright (c) 2002 Takayoshi Kochi (t-kouchi@cq.jp.nec.com)
* Copyright (c) 2002 NEC Corporation
*
* 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 <gregkh@us.ibm.com>,<h-aono@ap.jp.nec.com>
*
*/
#include <linux/config.h>
#include <linux/module.h>
#include <linux/kernel.h>
#include <linux/types.h>
#include <linux/proc_fs.h>
#include <linux/sysctl.h>
#include <linux/pci.h>
#include <linux/smp.h>
#include <linux/smp_lock.h>
#include <linux/init.h>
#include <linux/string.h>
#include <linux/mm.h>
#include <linux/errno.h>
#include <linux/ioport.h>
#include <linux/slab.h>
#include <linux/interrupt.h>
#include <linux/timer.h>
#include <linux/ioctl.h>
#include <linux/fcntl.h>
#include <linux/list.h>
#include "pci_hotplug.h"
#include "acpiphp.h"
#define MY_NAME "acpiphp_res"
/*
* sort_by_size - sort nodes by their length, smallest first
*/
static int sort_by_size(struct pci_resource **head)
{
struct pci_resource *current_res;
struct pci_resource *next_res;
int out_of_order = 1;
if (!(*head))
return 1;
if (!((*head)->next))
return 0;
while (out_of_order) {
out_of_order = 0;
/* Special case for swapping list head */
if (((*head)->next) &&
((*head)->length > (*head)->next->length)) {
out_of_order++;
current_res = *head;
*head = (*head)->next;
current_res->next = (*head)->next;
(*head)->next = current_res;
}
current_res = *head;
while (current_res->next && current_res->next->next) {
if (current_res->next->length > current_res->next->next->length) {
out_of_order++;
next_res = current_res->next;
current_res->next = current_res->next->next;
current_res = current_res->next;
next_res->next = current_res->next;
current_res->next = next_res;
} else
current_res = current_res->next;
}
} /* End of out_of_order loop */
return 0;
}
/*
* sort_by_max_size - sort nodes by their length, largest first
*/
static int sort_by_max_size(struct pci_resource **head)
{
struct pci_resource *current_res;
struct pci_resource *next_res;
int out_of_order = 1;
if (!(*head))
return 1;
if (!((*head)->next))
return 0;
while (out_of_order) {
out_of_order = 0;
/* Special case for swapping list head */
if (((*head)->next) &&
((*head)->length < (*head)->next->length)) {
out_of_order++;
current_res = *head;
*head = (*head)->next;
current_res->next = (*head)->next;
(*head)->next = current_res;
}
current_res = *head;
while (current_res->next && current_res->next->next) {
if (current_res->next->length < current_res->next->next->length) {
out_of_order++;
next_res = current_res->next;
current_res->next = current_res->next->next;
current_res = current_res->next;
next_res->next = current_res->next;
current_res->next = next_res;
} else
current_res = current_res->next;
}
} /* End of out_of_order loop */
return 0;
}
/**
* get_io_resource - get resource for I/O ports
*
* this function sorts the resource list by size and then
* returns the first node of "size" length that is not in the
* ISA aliasing window. If it finds a node larger than "size"
* it will split it up.
*
* size must be a power of two.
*
* difference from get_resource is handling of ISA aliasing space.
*
*/
struct pci_resource *acpiphp_get_io_resource (struct pci_resource **head, u32 size)
{
struct pci_resource *prevnode;
struct pci_resource *node;
struct pci_resource *split_node;
u64 temp_qword;
if (!(*head))
return NULL;
if (acpiphp_resource_sort_and_combine(head))
return NULL;
if (sort_by_size(head))
return NULL;
for (node = *head; node; node = node->next) {
if (node->length < size)
continue;
if (node->base & (size - 1)) {
/* this one isn't base aligned properly
so we'll make a new entry and split it up */
temp_qword = (node->base | (size-1)) + 1;
/* Short circuit if adjusted size is too small */
if ((node->length - (temp_qword - node->base)) < size)
continue;
split_node = acpiphp_make_resource(node->base, temp_qword - node->base);
if (!split_node)
return NULL;
node->base = temp_qword;
node->length -= split_node->length;
/* Put it in the list */
split_node->next = node->next;
node->next = split_node;
} /* End of non-aligned base */
/* Don't need to check if too small since we already did */
if (node->length > size) {
/* this one is longer than we need
so we'll make a new entry and split it up */
split_node = acpiphp_make_resource(node->base + size, node->length - size);
if (!split_node)
return NULL;
node->length = size;
/* Put it in the list */
split_node->next = node->next;
node->next = split_node;
} /* End of too big on top end */
/* For IO make sure it's not in the ISA aliasing space */
if (node->base & 0x300L)
continue;
/* If we got here, then it is the right size
Now take it out of the list */
if (*head == node) {
*head = node->next;
} else {
prevnode = *head;
while (prevnode->next != node)
prevnode = prevnode->next;
prevnode->next = node->next;
}
node->next = NULL;
/* Stop looping */
break;
}
return node;
}
/**
* get_max_resource - get the largest resource
*
* Gets the largest node that is at least "size" big from the
* list pointed to by head. It aligns the node on top and bottom
* to "size" alignment before returning it.
*/
struct pci_resource *acpiphp_get_max_resource (struct pci_resource **head, u32 size)
{
struct pci_resource *max;
struct pci_resource *temp;
struct pci_resource *split_node;
u64 temp_qword;
if (!(*head))
return NULL;
if (acpiphp_resource_sort_and_combine(head))
return NULL;
if (sort_by_max_size(head))
return NULL;
for (max = *head;max; max = max->next) {
/* If not big enough we could probably just bail,
instead we'll continue to the next. */
if (max->length < size)
continue;
if (max->base & (size - 1)) {
/* this one isn't base aligned properly
so we'll make a new entry and split it up */
temp_qword = (max->base | (size-1)) + 1;
/* Short circuit if adjusted size is too small */
if ((max->length - (temp_qword - max->base)) < size)
continue;
split_node = acpiphp_make_resource(max->base, temp_qword - max->base);
if (!split_node)
return NULL;
max->base = temp_qword;
max->length -= split_node->length;
/* Put it next in the list */
split_node->next = max->next;
max->next = split_node;
}
if ((max->base + max->length) & (size - 1)) {
/* this one isn't end aligned properly at the top
so we'll make a new entry and split it up */
temp_qword = ((max->base + max->length) & ~(size - 1));
split_node = acpiphp_make_resource(temp_qword,
max->length + max->base - temp_qword);
if (!split_node)
return NULL;
max->length -= split_node->length;
/* Put it in the list */
split_node->next = max->next;
max->next = split_node;
}
/* Make sure it didn't shrink too much when we aligned it */
if (max->length < size)
continue;
/* Now take it out of the list */
temp = (struct pci_resource*) *head;
if (temp == max) {
*head = max->next;
} else {
while (temp && temp->next != max) {
temp = temp->next;
}
temp->next = max->next;
}
max->next = NULL;
return max;
}
/* If we get here, we couldn't find one */
return NULL;
}
/**
* get_resource - get resource (mem, pfmem)
*
* this function sorts the resource list by size and then
* returns the first node of "size" length. If it finds a node
* larger than "size" it will split it up.
*
* size must be a power of two.
*
*/
struct pci_resource *acpiphp_get_resource (struct pci_resource **head, u32 size)
{
struct pci_resource *prevnode;
struct pci_resource *node;
struct pci_resource *split_node;
u64 temp_qword;
if (!(*head))
return NULL;
if (acpiphp_resource_sort_and_combine(head))
return NULL;
if (sort_by_size(head))
return NULL;
for (node = *head; node; node = node->next) {
dbg("%s: req_size =%x node=%p, base=%x, length=%x",
__FUNCTION__, size, node, (u32)node->base, node->length);
if (node->length < size)
continue;
if (node->base & (size - 1)) {
dbg("%s: not aligned", __FUNCTION__);
/* this one isn't base aligned properly
so we'll make a new entry and split it up */
temp_qword = (node->base | (size-1)) + 1;
/* Short circuit if adjusted size is too small */
if ((node->length - (temp_qword - node->base)) < size)
continue;
split_node = acpiphp_make_resource(node->base, temp_qword - node->base);
if (!split_node)
return NULL;
node->base = temp_qword;
node->length -= split_node->length;
/* Put it in the list */
split_node->next = node->next;
node->next = split_node;
} /* End of non-aligned base */
/* Don't need to check if too small since we already did */
if (node->length > size) {
dbg("%s: too big", __FUNCTION__);
/* this one is longer than we need
so we'll make a new entry and split it up */
split_node = acpiphp_make_resource(node->base + size, node->length - size);
if (!split_node)
return NULL;
node->length = size;
/* Put it in the list */
split_node->next = node->next;
node->next = split_node;
} /* End of too big on top end */
dbg("%s: got one!!!", __FUNCTION__);
/* If we got here, then it is the right size
Now take it out of the list */
if (*head == node) {
*head = node->next;
} else {
prevnode = *head;
while (prevnode->next != node)
prevnode = prevnode->next;
prevnode->next = node->next;
}
node->next = NULL;
/* Stop looping */
break;
}
return node;
}
/**
* get_resource_with_base - get resource with specific base address
*
* this function
* returns the first node of "size" length located at specified base address.
* If it finds a node larger than "size" it will split it up.
*
* size must be a power of two.
*
*/
struct pci_resource *acpiphp_get_resource_with_base (struct pci_resource **head, u64 base, u32 size)
{
struct pci_resource *prevnode;
struct pci_resource *node;
struct pci_resource *split_node;
u64 temp_qword;
if (!(*head))
return NULL;
if (acpiphp_resource_sort_and_combine(head))
return NULL;
for (node = *head; node; node = node->next) {
dbg(": 1st req_base=%x req_size =%x node=%p, base=%x, length=%x",
(u32)base, size, node, (u32)node->base, node->length);
if (node->base > base)
continue;
if ((node->base + node->length) < (base + size))
continue;
if (node->base < base) {
dbg(": split 1");
/* this one isn't base aligned properly
so we'll make a new entry and split it up */
temp_qword = base;
/* Short circuit if adjusted size is too small */
if ((node->length - (temp_qword - node->base)) < size)
continue;
split_node = acpiphp_make_resource(node->base, temp_qword - node->base);
if (!split_node)
return NULL;
node->base = temp_qword;
node->length -= split_node->length;
/* Put it in the list */
split_node->next = node->next;
node->next = split_node;
}
dbg(": 2nd req_base=%x req_size =%x node=%p, base=%x, length=%x",
(u32)base, size, node, (u32)node->base, node->length);
/* Don't need to check if too small since we already did */
if (node->length > size) {
dbg(": split 2");
/* this one is longer than we need
so we'll make a new entry and split it up */
split_node = acpiphp_make_resource(node->base + size, node->length - size);
if (!split_node)
return NULL;
node->length = size;
/* Put it in the list */
split_node->next = node->next;
node->next = split_node;
} /* End of too big on top end */
dbg(": got one!!!");
/* If we got here, then it is the right size
Now take it out of the list */
if (*head == node) {
*head = node->next;
} else {
prevnode = *head;
while (prevnode->next != node)
prevnode = prevnode->next;
prevnode->next = node->next;
}
node->next = NULL;
/* Stop looping */
break;
}
return node;
}
/**
* acpiphp_resource_sort_and_combine
*
* Sorts all of the nodes in the list in ascending order by
* their base addresses. Also does garbage collection by
* combining adjacent nodes.
*
* returns 0 if success
*/
int acpiphp_resource_sort_and_combine (struct pci_resource **head)
{
struct pci_resource *node1;
struct pci_resource *node2;
int out_of_order = 1;
if (!(*head))
return 1;
dbg("*head->next = %p",(*head)->next);
if (!(*head)->next)
return 0; /* only one item on the list, already sorted! */
dbg("*head->base = 0x%x",(u32)(*head)->base);
dbg("*head->next->base = 0x%x", (u32)(*head)->next->base);
while (out_of_order) {
out_of_order = 0;
/* Special case for swapping list head */
if (((*head)->next) &&
((*head)->base > (*head)->next->base)) {
node1 = *head;
(*head) = (*head)->next;
node1->next = (*head)->next;
(*head)->next = node1;
out_of_order++;
}
node1 = (*head);
while (node1->next && node1->next->next) {
if (node1->next->base > node1->next->next->base) {
out_of_order++;
node2 = node1->next;
node1->next = node1->next->next;
node1 = node1->next;
node2->next = node1->next;
node1->next = node2;
} else
node1 = node1->next;
}
} /* End of out_of_order loop */
node1 = *head;
while (node1 && node1->next) {
if ((node1->base + node1->length) == node1->next->base) {
/* Combine */
dbg("8..");
node1->length += node1->next->length;
node2 = node1->next;
node1->next = node1->next->next;
kfree(node2);
} else
node1 = node1->next;
}
return 0;
}
/**
* acpiphp_make_resource - make resource structure
* @base: base address of a resource
* @length: length of a resource
*/
struct pci_resource *acpiphp_make_resource (u64 base, u32 length)
{
struct pci_resource *res;
res = kmalloc(sizeof(struct pci_resource), GFP_KERNEL);
if (res) {
memset(res, 0, sizeof(struct pci_resource));
res->base = base;
res->length = length;
}
return res;
}
/**
* acpiphp_move_resource - move linked resources from one to another
* @from: head of linked resource list
* @to: head of linked resource list
*/
void acpiphp_move_resource (struct pci_resource **from, struct pci_resource **to)
{
struct pci_resource *tmp;
while (*from) {
tmp = (*from)->next;
(*from)->next = *to;
*to = *from;
*from = tmp;
}
/* *from = NULL is guaranteed */
}
/**
* acpiphp_free_resource - free all linked resources
* @res: head of linked resource list
*/
void acpiphp_free_resource (struct pci_resource **res)
{
struct pci_resource *tmp;
while (*res) {
tmp = (*res)->next;
kfree(*res);
*res = tmp;
}
/* *res = NULL is guaranteed */
}
/* debug support functions; will go away sometime :) */
static void dump_resource(struct pci_resource *head)
{
struct pci_resource *p;
int cnt;
p = head;
cnt = 0;
while (p) {
dbg("[%02d] %08x - %08x",
cnt++, (u32)p->base, (u32)p->base + p->length - 1);
p = p->next;
}
}
void acpiphp_dump_resource(struct acpiphp_bridge *bridge)
{
dbg("I/O resource:");
dump_resource(bridge->io_head);
dbg("MEM resource:");
dump_resource(bridge->mem_head);
dbg("PMEM resource:");
dump_resource(bridge->p_mem_head);
dbg("BUS resource:");
dump_resource(bridge->bus_head);
}
void acpiphp_dump_func_resource(struct acpiphp_func *func)
{
dbg("I/O resource:");
dump_resource(func->io_head);
dbg("MEM resource:");
dump_resource(func->mem_head);
dbg("PMEM resource:");
dump_resource(func->p_mem_head);
dbg("BUS resource:");
dump_resource(func->bus_head);
}
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