--- Begin Message ---
- From: Greg KH <greg kroah com>
- To: linux-kernel vger kernel org, pcihpd-discuss lists sourceforge net
- Subject: Re: [PATCH] PCI hotplug changes for 2.5.41
- Date: Wed, 9 Oct 2002 15:40:42 -0700
# This is a BitKeeper generated patch for the following project:
# Project Name: Linux kernel tree
# This patch format is intended for GNU patch command version 2.5 or higher.
# This patch includes the following deltas:
# ChangeSet 1.742 -> 1.743
# drivers/hotplug/Makefile 1.5 -> 1.6
# drivers/hotplug/Config.in 1.3 -> 1.4
# drivers/hotplug/Config.help 1.2 -> 1.3
# (new) -> 1.1 drivers/hotplug/acpiphp_pci.c
# (new) -> 1.1 drivers/hotplug/acpiphp_glue.c
# (new) -> 1.1 drivers/hotplug/acpiphp_res.c
# (new) -> 1.1 drivers/hotplug/acpiphp_core.c
# (new) -> 1.1 drivers/hotplug/acpiphp.h
#
# The following is the BitKeeper ChangeSet Log
# --------------------------------------------
# 02/10/09 t-kouchi mvf biglobe ne jp 1.743
# [PATCH] ACPI PCI hotplug driver for 2.5
#
# --------------------------------------------
#
diff -Nru a/drivers/hotplug/Config.help b/drivers/hotplug/Config.help
--- a/drivers/hotplug/Config.help Wed Oct 9 15:37:29 2002
+++ b/drivers/hotplug/Config.help Wed Oct 9 15:37:29 2002
@@ -40,3 +40,14 @@
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.
+
diff -Nru a/drivers/hotplug/Config.in b/drivers/hotplug/Config.in
--- a/drivers/hotplug/Config.in Wed Oct 9 15:37:29 2002
+++ b/drivers/hotplug/Config.in Wed Oct 9 15:37:29 2002
@@ -11,5 +11,6 @@
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 $CONFIG_HOTPLUG_PCI
endmenu
diff -Nru a/drivers/hotplug/Makefile b/drivers/hotplug/Makefile
--- a/drivers/hotplug/Makefile Wed Oct 9 15:37:29 2002
+++ b/drivers/hotplug/Makefile Wed Oct 9 15:37:29 2002
@@ -7,6 +7,7 @@
obj-$(CONFIG_HOTPLUG_PCI) += pci_hotplug.o
obj-$(CONFIG_HOTPLUG_PCI_COMPAQ) += cpqphp.o
obj-$(CONFIG_HOTPLUG_PCI_IBM) += ibmphp.o
+obj-$(CONFIG_HOTPLUG_PCI_ACPI) += acpiphp.o
pci_hotplug-objs := pci_hotplug_core.o \
pci_hotplug_util.o
@@ -21,6 +22,18 @@
ibmphp_pci.o \
ibmphp_res.o \
ibmphp_hpc.o
+
+acpiphp-objs := acpiphp_core.o \
+ acpiphp_glue.o \
+ acpiphp_pci.o \
+ acpiphp_res.o
+
+ifdef CONFIG_HOTPLUG_PCI_ACPI
+ EXTRA_CFLAGS += -D_LINUX -I$(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
diff -Nru a/drivers/hotplug/acpiphp.h b/drivers/hotplug/acpiphp.h
--- /dev/null Wed Dec 31 16:00:00 1969
+++ b/drivers/hotplug/acpiphp.h Wed Oct 9 15:37:29 2002
@@ -0,0 +1,263 @@
+/*
+ * 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 */
diff -Nru a/drivers/hotplug/acpiphp_core.c b/drivers/hotplug/acpiphp_core.c
--- /dev/null Wed Dec 31 16:00:00 1969
+++ b/drivers/hotplug/acpiphp_core.c Wed Oct 9 15:37:29 2002
@@ -0,0 +1,502 @@
+/*
+ * 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);
diff -Nru a/drivers/hotplug/acpiphp_glue.c b/drivers/hotplug/acpiphp_glue.c
--- /dev/null Wed Dec 31 16:00:00 1969
+++ b/drivers/hotplug/acpiphp_glue.c Wed Oct 9 15:37:29 2002
@@ -0,0 +1,1463 @@
+/*
+ * 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;
+}
diff -Nru a/drivers/hotplug/acpiphp_pci.c b/drivers/hotplug/acpiphp_pci.c
--- /dev/null Wed Dec 31 16:00:00 1969
+++ b/drivers/hotplug/acpiphp_pci.c Wed Oct 9 15:37:29 2002
@@ -0,0 +1,692 @@
+/*
+ * 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;
+}
diff -Nru a/drivers/hotplug/acpiphp_res.c b/drivers/hotplug/acpiphp_res.c
--- /dev/null Wed Dec 31 16:00:00 1969
+++ b/drivers/hotplug/acpiphp_res.c Wed Oct 9 15:37:29 2002
@@ -0,0 +1,699 @@
+/*
+ * 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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