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Merge branch 'pci/jiang-subdrivers' into next

Browse Source 
* pci/jiang-subdrivers:
  PCI/ACPI: Remove support of ACPI PCI subdrivers
  PCI: acpiphp: Protect acpiphp data structures from concurrent updates
  PCI: acpiphp: Use normal list to simplify implementation
  PCI: acpiphp: Do not use ACPI PCI subdriver mechanism
  PCI: acpiphp: Convert acpiphp to be builtin only, not modular
  PCI/ACPI: Handle PCI slot devices when creating/destroying PCI buses
  x86/PCI: Implement pcibios_{add|remove}_bus() hooks
  ia64/PCI: Implement pcibios_{add|remove}_bus() hooks
  PCI/ACPI: Prepare stub functions to handle ACPI PCI (hotplug) slots
  PCI: Add pcibios hooks for adding and removing PCI buses
  PCI: acpiphp: Replace local macros with standard ACPI macros
  PCI: acpiphp: Remove all functions even if function 0 doesn't exist
  PCI: acpiphp: Use list_for_each_entry_safe() in acpiphp_sanitize_bus()
  PCI: Clean up usages of pci_bus->is_added
  PCI: When removing bus, always remove legacy files & unregister
This commit is contained in:
Bjorn Helgaas 2013-04-16 10:37:22 -06:00
commit a3b6bbd577
16 changed files with 281 additions and 525 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

11
arch/ia64/pci/pci.c
View File

@ -15,6 +15,7 @@
#include <linux/types.h>
#include <linux/kernel.h>
#include <linux/pci.h>
#include <linux/pci-acpi.h>
#include <linux/init.h>
#include <linux/ioport.h>
#include <linux/slab.h>
@ -458,6 +459,16 @@ void pcibios_fixup_bus(struct pci_bus *b)
platform_pci_fixup_bus(b);
}
void pcibios_add_bus(struct pci_bus *bus)
{
acpi_pci_add_bus(bus);
}
void pcibios_remove_bus(struct pci_bus *bus)
{
acpi_pci_remove_bus(bus);
}
void pcibios_set_master (struct pci_dev *dev)
{
/* No special bus mastering setup handling */

11
arch/x86/pci/common.c
View File

@ -6,6 +6,7 @@
#include <linux/sched.h>
#include <linux/pci.h>
#include <linux/pci-acpi.h>
#include <linux/ioport.h>
#include <linux/init.h>
#include <linux/dmi.h>
@ -170,6 +171,16 @@ void pcibios_fixup_bus(struct pci_bus *b)
pcibios_fixup_device_resources(dev);
}
void pcibios_add_bus(struct pci_bus *bus)
{
acpi_pci_add_bus(bus);
}
void pcibios_remove_bus(struct pci_bus *bus)
{
acpi_pci_remove_bus(bus);
}
/*
* Only use DMI information to set this if nothing was passed
* on the kernel command line (which was parsed earlier).

48
drivers/acpi/pci_root.c
View File

@ -65,44 +65,12 @@ static struct acpi_scan_handler pci_root_handler = {
.detach = acpi_pci_root_remove,
};
/* Lock to protect both acpi_pci_roots and acpi_pci_drivers lists */
/* Lock to protect both acpi_pci_roots lists */
static DEFINE_MUTEX(acpi_pci_root_lock);
static LIST_HEAD(acpi_pci_roots);
static LIST_HEAD(acpi_pci_drivers);
static DEFINE_MUTEX(osc_lock);
int acpi_pci_register_driver(struct acpi_pci_driver *driver)
{
int n = 0;
struct acpi_pci_root *root;
mutex_lock(&acpi_pci_root_lock);
list_add_tail(&driver->node, &acpi_pci_drivers);
if (driver->add)
list_for_each_entry(root, &acpi_pci_roots, node) {
driver->add(root);
n++;
}
mutex_unlock(&acpi_pci_root_lock);
return n;
}
EXPORT_SYMBOL(acpi_pci_register_driver);
void acpi_pci_unregister_driver(struct acpi_pci_driver *driver)
{
struct acpi_pci_root *root;
mutex_lock(&acpi_pci_root_lock);
list_del(&driver->node);
if (driver->remove)
list_for_each_entry(root, &acpi_pci_roots, node)
driver->remove(root);
mutex_unlock(&acpi_pci_root_lock);
}
EXPORT_SYMBOL(acpi_pci_unregister_driver);
/**
* acpi_is_root_bridge - determine whether an ACPI CA node is a PCI root bridge
* @handle - the ACPI CA node in question.
@ -413,7 +381,6 @@ static int acpi_pci_root_add(struct acpi_device *device,
acpi_status status;
int result;
struct acpi_pci_root *root;
struct acpi_pci_driver *driver;
u32 flags, base_flags;
bool is_osc_granted = false;
@ -573,12 +540,6 @@ static int acpi_pci_root_add(struct acpi_device *device,
pci_assign_unassigned_bus_resources(root->bus);
}
mutex_lock(&acpi_pci_root_lock);
list_for_each_entry(driver, &acpi_pci_drivers, node)
if (driver->add)
driver->add(root);
mutex_unlock(&acpi_pci_root_lock);
/* need to after hot-added ioapic is registered */
if (system_state != SYSTEM_BOOTING)
pci_enable_bridges(root->bus);
@ -599,16 +560,9 @@ end:
static void acpi_pci_root_remove(struct acpi_device *device)
{
struct acpi_pci_root *root = acpi_driver_data(device);
struct acpi_pci_driver *driver;
pci_stop_root_bus(root->bus);
mutex_lock(&acpi_pci_root_lock);
list_for_each_entry_reverse(driver, &acpi_pci_drivers, node)
if (driver->remove)
driver->remove(root);
mutex_unlock(&acpi_pci_root_lock);
device_set_run_wake(root->bus->bridge, false);
pci_acpi_remove_bus_pm_notifier(device);

170
drivers/acpi/pci_slot.c
View File

@ -9,6 +9,9 @@
* Copyright (C) 2007-2008 Hewlett-Packard Development Company, L.P.
* Alex Chiang <achiang@hp.com>
*
* Copyright (C) 2013 Huawei Tech. Co., Ltd.
* Jiang Liu <jiang.liu@huawei.com>
*
* This program is free software; you can redistribute it and/or modify it
* under the terms and conditions of the GNU General Public License,
* version 2, as published by the Free Software Foundation.
@ -28,10 +31,9 @@
#include <linux/init.h>
#include <linux/slab.h>
#include <linux/types.h>
#include <linux/list.h>
#include <linux/pci.h>
#include <linux/acpi.h>
#include <acpi/acpi_bus.h>
#include <acpi/acpi_drivers.h>
#include <linux/dmi.h>
static bool debug;
@ -61,20 +63,12 @@ ACPI_MODULE_NAME("pci_slot");
#define SLOT_NAME_SIZE 21 /* Inspired by #define in acpiphp.h */
struct acpi_pci_slot {
acpi_handle root_handle; /* handle of the root bridge */
struct pci_slot *pci_slot; /* corresponding pci_slot */
struct list_head list; /* node in the list of slots */
};
static int acpi_pci_slot_add(struct acpi_pci_root *root);
static void acpi_pci_slot_remove(struct acpi_pci_root *root);
static LIST_HEAD(slot_list);
static DEFINE_MUTEX(slot_list_lock);
static struct acpi_pci_driver acpi_pci_slot_driver = {
.add = acpi_pci_slot_add,
.remove = acpi_pci_slot_remove,
};
static int
check_slot(acpi_handle handle, unsigned long long *sun)
@ -113,21 +107,8 @@ out:
return device;
}
struct callback_args {
acpi_walk_callback user_function; /* only for walk_p2p_bridge */
struct pci_bus *pci_bus;
acpi_handle root_handle;
};
/*
* register_slot
*
* Called once for each SxFy object in the namespace. Don't worry about
* calling pci_create_slot multiple times for the same pci_bus:device,
* since each subsequent call simply bumps the refcount on the pci_slot.
*
* The number of calls to pci_destroy_slot from unregister_slot is
* symmetrical.
* Check whether handle has an associated slot and create PCI slot if it has.
*/
static acpi_status
register_slot(acpi_handle handle, u32 lvl, void *context, void **rv)
@ -137,13 +118,22 @@ register_slot(acpi_handle handle, u32 lvl, void *context, void **rv)
char name[SLOT_NAME_SIZE];
struct acpi_pci_slot *slot;
struct pci_slot *pci_slot;
struct callback_args *parent_context = context;
struct pci_bus *pci_bus = parent_context->pci_bus;
struct pci_bus *pci_bus = context;
device = check_slot(handle, &sun);
if (device < 0)
return AE_OK;
/*
* There may be multiple PCI functions associated with the same slot.
* Check whether PCI slot has already been created for this PCI device.
*/
list_for_each_entry(slot, &slot_list, list) {
pci_slot = slot->pci_slot;
if (pci_slot->bus == pci_bus && pci_slot->number == device)
return AE_OK;
}
slot = kmalloc(sizeof(*slot), GFP_KERNEL);
if (!slot) {
err("%s: cannot allocate memory\n", __func__);
@ -158,12 +148,8 @@ register_slot(acpi_handle handle, u32 lvl, void *context, void **rv)
return AE_OK;
}
slot->root_handle = parent_context->root_handle;
slot->pci_slot = pci_slot;
INIT_LIST_HEAD(&slot->list);
mutex_lock(&slot_list_lock);
list_add(&slot->list, &slot_list);
mutex_unlock(&slot_list_lock);
get_device(&pci_bus->dev);
@ -173,131 +159,24 @@ register_slot(acpi_handle handle, u32 lvl, void *context, void **rv)
return AE_OK;
}
/*
* walk_p2p_bridge - discover and walk p2p bridges
* @handle: points to an acpi_pci_root
* @context: p2p_bridge_context pointer
*
* Note that when we call ourselves recursively, we pass a different
* value of pci_bus in the child_context.
*/
static acpi_status
walk_p2p_bridge(acpi_handle handle, u32 lvl, void *context, void **rv)
void acpi_pci_slot_enumerate(struct pci_bus *bus, acpi_handle handle)
{
int device, function;
unsigned long long adr;
acpi_status status;
acpi_handle dummy_handle;
acpi_walk_callback user_function;
struct pci_dev *dev;
struct pci_bus *pci_bus;
struct callback_args child_context;
struct callback_args *parent_context = context;
pci_bus = parent_context->pci_bus;
user_function = parent_context->user_function;
status = acpi_get_handle(handle, "_ADR", &dummy_handle);
if (ACPI_FAILURE(status))
return AE_OK;
status = acpi_evaluate_integer(handle, "_ADR", NULL, &adr);
if (ACPI_FAILURE(status))
return AE_OK;
device = (adr >> 16) & 0xffff;
function = adr & 0xffff;
dev = pci_get_slot(pci_bus, PCI_DEVFN(device, function));
if (!dev || !dev->subordinate)
goto out;
child_context.pci_bus = dev->subordinate;
child_context.user_function = user_function;
child_context.root_handle = parent_context->root_handle;
dbg("p2p bridge walk, pci_bus = %x\n", dev->subordinate->number);
status = acpi_walk_namespace(ACPI_TYPE_DEVICE, handle, (u32)1,
user_function, NULL, &child_context, NULL);
if (ACPI_FAILURE(status))
goto out;
status = acpi_walk_namespace(ACPI_TYPE_DEVICE, handle, (u32)1,
walk_p2p_bridge, NULL, &child_context, NULL);
out:
pci_dev_put(dev);
return AE_OK;
mutex_lock(&slot_list_lock);
acpi_walk_namespace(ACPI_TYPE_DEVICE, handle, 1,
register_slot, NULL, bus, NULL);
mutex_unlock(&slot_list_lock);
}
/*
* walk_root_bridge - generic root bridge walker
* @root: poiner of an acpi_pci_root
* @user_function: user callback for slot objects
*
* Call user_function for all objects underneath this root bridge.
* Walk p2p bridges underneath us and call user_function on those too.
*/
static int
walk_root_bridge(struct acpi_pci_root *root, acpi_walk_callback user_function)
{
acpi_status status;
acpi_handle handle = root->device->handle;
struct pci_bus *pci_bus = root->bus;
struct callback_args context;
context.pci_bus = pci_bus;
context.user_function = user_function;
context.root_handle = handle;
dbg("root bridge walk, pci_bus = %x\n", pci_bus->number);
status = acpi_walk_namespace(ACPI_TYPE_DEVICE, handle, (u32)1,
user_function, NULL, &context, NULL);
if (ACPI_FAILURE(status))
return status;
status = acpi_walk_namespace(ACPI_TYPE_DEVICE, handle, (u32)1,
walk_p2p_bridge, NULL, &context, NULL);
if (ACPI_FAILURE(status))
err("%s: walk_p2p_bridge failure - %d\n", __func__, status);
return status;
}
/*
* acpi_pci_slot_add
* @handle: points to an acpi_pci_root
*/
static int
acpi_pci_slot_add(struct acpi_pci_root *root)
{
acpi_status status;
status = walk_root_bridge(root, register_slot);
if (ACPI_FAILURE(status))
err("%s: register_slot failure - %d\n", __func__, status);
return status;
}
/*
* acpi_pci_slot_remove
* @handle: points to an acpi_pci_root
*/
static void
acpi_pci_slot_remove(struct acpi_pci_root *root)
void acpi_pci_slot_remove(struct pci_bus *bus)
{
struct acpi_pci_slot *slot, *tmp;
struct pci_bus *pbus;
acpi_handle handle = root->device->handle;
mutex_lock(&slot_list_lock);
list_for_each_entry_safe(slot, tmp, &slot_list, list) {
if (slot->root_handle == handle) {
if (slot->pci_slot->bus == bus) {
list_del(&slot->list);
pbus = slot->pci_slot->bus;
pci_destroy_slot(slot->pci_slot);
put_device(&pbus->dev);
put_device(&bus->dev);
kfree(slot);
}
}
@ -332,5 +211,4 @@ static struct dmi_system_id acpi_pci_slot_dmi_table[] __initdata = {
void __init acpi_pci_slot_init(void)
{
dmi_check_system(acpi_pci_slot_dmi_table);
acpi_pci_register_driver(&acpi_pci_slot_driver);
}

1
drivers/acpi/scan.c
View File

@ -1790,7 +1790,6 @@ int __init acpi_scan_init(void)
acpi_platform_init();
acpi_csrt_init();
acpi_container_init();
acpi_pci_slot_init();
mutex_lock(&acpi_scan_lock);
/*

11
drivers/pci/bus.c
View File

@ -206,16 +206,9 @@ void pci_bus_add_devices(const struct pci_bus *bus)
list_for_each_entry(dev, &bus->devices, bus_list) {
BUG_ON(!dev->is_added);
child = dev->subordinate;
if (!child)
continue;
pci_bus_add_devices(child);
if (child->is_added)
continue;
child->is_added = 1;
if (child)
pci_bus_add_devices(child);
}
}

7
drivers/pci/hotplug/Kconfig
View File

@ -52,15 +52,12 @@ config HOTPLUG_PCI_IBM
When in doubt, say N.
config HOTPLUG_PCI_ACPI
tristate "ACPI PCI Hotplug driver"
depends on (!ACPI_DOCK && ACPI) || (ACPI_DOCK)
bool "ACPI PCI Hotplug driver"
depends on HOTPLUG_PCI=y && ((!ACPI_DOCK && ACPI) || (ACPI_DOCK))
help
Say Y here if you have a system that supports PCI Hotplug using
ACPI.
To compile this driver as a module, choose M here: the
module will be called acpiphp.
When in doubt, say N.
config HOTPLUG_PCI_ACPI_IBM

13
drivers/pci/hotplug/acpiphp.h
View File

@ -73,8 +73,9 @@ static inline const char *slot_name(struct slot *slot)
*/
struct acpiphp_bridge {
struct list_head list;
struct list_head slots;
struct kref ref;
acpi_handle handle;
struct acpiphp_slot *slots;
/* Ejectable PCI-to-PCI bridge (PCI bridge and PCI function) */
struct acpiphp_func *func;
@ -97,7 +98,7 @@ struct acpiphp_bridge {
* PCI slot information for each *physical* PCI slot
*/
struct acpiphp_slot {
struct acpiphp_slot *next;
struct list_head node;
struct acpiphp_bridge *bridge; /* parent */
struct list_head funcs; /* one slot may have different
objects (i.e. for each function) */
@ -119,7 +120,6 @@ struct acpiphp_slot {
*/
struct acpiphp_func {
struct acpiphp_slot *slot; /* parent */
struct acpiphp_bridge *bridge; /* Ejectable PCI-to-PCI bridge */
struct list_head sibling;
struct notifier_block nb;
@ -146,10 +146,6 @@ struct acpiphp_attention_info
#define ACPI_PCI_HOST_HID "PNP0A03"
/* 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 */
@ -180,8 +176,6 @@ extern int acpiphp_register_hotplug_slot(struct acpiphp_slot *slot);
extern void acpiphp_unregister_hotplug_slot(struct acpiphp_slot *slot);
/* acpiphp_glue.c */
extern int acpiphp_glue_init (void);
extern void acpiphp_glue_exit (void);
typedef int (*acpiphp_callback)(struct acpiphp_slot *slot, void *data);
extern int acpiphp_enable_slot (struct acpiphp_slot *slot);
@ -194,5 +188,6 @@ extern u8 acpiphp_get_adapter_status (struct acpiphp_slot *slot);
/* variables */
extern bool acpiphp_debug;
extern bool acpiphp_disabled;
#endif /* _ACPIPHP_H */

30
drivers/pci/hotplug/acpiphp_core.c
View File

@ -37,6 +37,7 @@
#include <linux/kernel.h>
#include <linux/pci.h>
#include <linux/pci-acpi.h>
#include <linux/pci_hotplug.h>
#include <linux/slab.h>
#include <linux/smp.h>
@ -48,6 +49,7 @@
#define SLOT_NAME_SIZE 21 /* {_SUN} */
bool acpiphp_debug;
bool acpiphp_disabled;
/* local variables */
static struct acpiphp_attention_info *attention_info;
@ -60,7 +62,9 @@ MODULE_AUTHOR(DRIVER_AUTHOR);
MODULE_DESCRIPTION(DRIVER_DESC);
MODULE_LICENSE("GPL");
MODULE_PARM_DESC(debug, "Debugging mode enabled or not");
MODULE_PARM_DESC(disable, "disable acpiphp driver");
module_param_named(debug, acpiphp_debug, bool, 0644);
module_param_named(disable, acpiphp_disabled, bool, 0444);
/* export the attention callback registration methods */
EXPORT_SYMBOL_GPL(acpiphp_register_attention);
@ -351,27 +355,9 @@ void acpiphp_unregister_hotplug_slot(struct acpiphp_slot *acpiphp_slot)
}
static int __init acpiphp_init(void)
void __init acpiphp_init(void)
{
info(DRIVER_DESC " version: " DRIVER_VERSION "\n");
if (acpi_pci_disabled)
return 0;
/* read all the ACPI info from the system */
/* initialize internal data structure etc. */
return acpiphp_glue_init();
info(DRIVER_DESC " version: " DRIVER_VERSION "%s\n",
acpiphp_disabled ? ", disabled by user; please report a bug"
: "");
}
static void __exit acpiphp_exit(void)
{
if (acpi_pci_disabled)
return;
/* deallocate internal data structures etc. */
acpiphp_glue_exit();
}
module_init(acpiphp_init);
module_exit(acpiphp_exit);

415
drivers/pci/hotplug/acpiphp_glue.c
View File

@ -54,6 +54,7 @@
#include "acpiphp.h"
static LIST_HEAD(bridge_list);
static DEFINE_MUTEX(bridge_mutex);
#define MY_NAME "acpiphp_glue"
@ -61,6 +62,7 @@ static void handle_hotplug_event_bridge (acpi_handle, u32, void *);
static void acpiphp_sanitize_bus(struct pci_bus *bus);
static void acpiphp_set_hpp_values(struct pci_bus *bus);
static void handle_hotplug_event_func(acpi_handle handle, u32 type, void *context);
static void free_bridge(struct kref *kref);
/* callback routine to check for the existence of a pci dock device */
static acpi_status
@ -76,6 +78,39 @@ is_pci_dock_device(acpi_handle handle, u32 lvl, void *context, void **rv)
}
}
static inline void get_bridge(struct acpiphp_bridge *bridge)
{
kref_get(&bridge->ref);
}
static inline void put_bridge(struct acpiphp_bridge *bridge)
{
kref_put(&bridge->ref, free_bridge);
}
static void free_bridge(struct kref *kref)
{
struct acpiphp_bridge *bridge;
struct acpiphp_slot *slot, *next;
struct acpiphp_func *func, *tmp;
bridge = container_of(kref, struct acpiphp_bridge, ref);
list_for_each_entry_safe(slot, next, &bridge->slots, node) {
list_for_each_entry_safe(func, tmp, &slot->funcs, sibling) {
kfree(func);
}
kfree(slot);
}
/* Release reference acquired by acpiphp_bridge_handle_to_function() */
if ((bridge->flags & BRIDGE_HAS_EJ0) && bridge->func)
put_bridge(bridge->func->slot->bridge);
put_device(&bridge->pci_bus->dev);
pci_dev_put(bridge->pci_dev);
kfree(bridge);
}
/*
* the _DCK method can do funny things... and sometimes not
* hah-hah funny.
@ -154,9 +189,10 @@ register_slot(acpi_handle handle, u32 lvl, void *context, void **rv)
acpi_handle tmp;
acpi_status status = AE_OK;
unsigned long long adr, sun;
int device, function, retval;
int device, function, retval, found = 0;
struct pci_bus *pbus = bridge->pci_bus;
struct pci_dev *pdev;
u32 val;
if (!acpi_pci_check_ejectable(pbus, handle) && !is_dock_device(handle))
return AE_OK;
@ -170,7 +206,7 @@ register_slot(acpi_handle handle, u32 lvl, void *context, void **rv)
device = (adr >> 16) & 0xffff;
function = adr & 0xffff;
pdev = pbus->self;
pdev = bridge->pci_dev;
if (pdev && device_is_managed_by_native_pciehp(pdev))
return AE_OK;
@ -178,7 +214,6 @@ register_slot(acpi_handle handle, u32 lvl, void *context, void **rv)
if (!newfunc)
return AE_NO_MEMORY;
INIT_LIST_HEAD(&newfunc->sibling);
newfunc->handle = handle;
newfunc->function = function;
@ -207,14 +242,15 @@ register_slot(acpi_handle handle, u32 lvl, void *context, void **rv)
}
/* search for objects that share the same slot */
for (slot = bridge->slots; slot; slot = slot->next)
list_for_each_entry(slot, &bridge->slots, node)
if (slot->device == device) {
if (slot->sun != sun)
warn("sibling found, but _SUN doesn't match!\n");
found = 1;
break;
}
if (!slot) {
if (!found) {
slot = kzalloc(sizeof(struct acpiphp_slot), GFP_KERNEL);
if (!slot) {
kfree(newfunc);
@ -227,9 +263,9 @@ register_slot(acpi_handle handle, u32 lvl, void *context, void **rv)
INIT_LIST_HEAD(&slot->funcs);
mutex_init(&slot->crit_sect);
slot->next = bridge->slots;
bridge->slots = slot;
mutex_lock(&bridge_mutex);
list_add_tail(&slot->node, &bridge->slots);
mutex_unlock(&bridge_mutex);
bridge->nr_slots++;
dbg("found ACPI PCI Hotplug slot %llu at PCI %04x:%02x:%02x\n",
@ -247,13 +283,13 @@ register_slot(acpi_handle handle, u32 lvl, void *context, void **rv)
}
newfunc->slot = slot;
mutex_lock(&bridge_mutex);
list_add_tail(&newfunc->sibling, &slot->funcs);
mutex_unlock(&bridge_mutex);
pdev = pci_get_slot(pbus, PCI_DEVFN(device, function));
if (pdev) {
if (pci_bus_read_dev_vendor_id(pbus, PCI_DEVFN(device, function),
&val, 60*1000))
slot->flags |= (SLOT_ENABLED | SLOT_POWEREDON);
pci_dev_put(pdev);
}
if (is_dock_device(handle)) {
/* we don't want to call this device's _EJ0
@ -290,7 +326,9 @@ register_slot(acpi_handle handle, u32 lvl, void *context, void **rv)
err_exit:
bridge->nr_slots--;
bridge->slots = slot->next;
mutex_lock(&bridge_mutex);
list_del(&slot->node);
mutex_unlock(&bridge_mutex);
kfree(slot);
kfree(newfunc);
@ -315,13 +353,17 @@ static void init_bridge_misc(struct acpiphp_bridge *bridge)
acpi_status status;
/* must be added to the list prior to calling register_slot */
mutex_lock(&bridge_mutex);
list_add(&bridge->list, &bridge_list);
mutex_unlock(&bridge_mutex);
/* register all slot objects under this bridge */
status = acpi_walk_namespace(ACPI_TYPE_DEVICE, bridge->handle, (u32)1,
register_slot, NULL, bridge, NULL);
if (ACPI_FAILURE(status)) {
mutex_lock(&bridge_mutex);
list_del(&bridge->list);
mutex_unlock(&bridge_mutex);
return;
}
@ -351,178 +393,46 @@ static struct acpiphp_func *acpiphp_bridge_handle_to_function(acpi_handle handle
{
struct acpiphp_bridge *bridge;
struct acpiphp_slot *slot;
struct acpiphp_func *func;
struct acpiphp_func *func = NULL;
mutex_lock(&bridge_mutex);
list_for_each_entry(bridge, &bridge_list, list) {
for (slot = bridge->slots; slot; slot = slot->next) {
list_for_each_entry(slot, &bridge->slots, node) {
list_for_each_entry(func, &slot->funcs, sibling) {
if (func->handle == handle)
if (func->handle == handle) {
get_bridge(func->slot->bridge);
mutex_unlock(&bridge_mutex);
return func;
}
}
}
}
mutex_unlock(&bridge_mutex);
return NULL;
}
static inline void config_p2p_bridge_flags(struct acpiphp_bridge *bridge)
{
acpi_handle dummy_handle;
struct acpiphp_func *func;
if (ACPI_SUCCESS(acpi_get_handle(bridge->handle,
"_EJ0", &dummy_handle))) {
bridge->flags |= BRIDGE_HAS_EJ0;
dbg("found ejectable p2p bridge\n");
/* make link between PCI bridge and PCI function */
func = acpiphp_bridge_handle_to_function(bridge->handle);
if (!func)
return;
bridge->func = func;
func->bridge = bridge;
}
}
/* allocate and initialize host bridge data structure */
static void add_host_bridge(struct acpi_pci_root *root)
{
struct acpiphp_bridge *bridge;
acpi_handle handle = root->device->handle;
bridge = kzalloc(sizeof(struct acpiphp_bridge), GFP_KERNEL);
if (bridge == NULL)
return;
bridge->handle = handle;
bridge->pci_bus = root->bus;
init_bridge_misc(bridge);
}
/* allocate and initialize PCI-to-PCI bridge data structure */
static void add_p2p_bridge(acpi_handle *handle)
{
struct acpiphp_bridge *bridge;
bridge = kzalloc(sizeof(struct acpiphp_bridge), GFP_KERNEL);
if (bridge == NULL) {
err("out of memory\n");
return;
}
bridge->handle = handle;
config_p2p_bridge_flags(bridge);
bridge->pci_dev = acpi_get_pci_dev(handle);
bridge->pci_bus = bridge->pci_dev->subordinate;
if (!bridge->pci_bus) {
err("This is not a PCI-to-PCI bridge!\n");
goto err;
}
/*
* Grab a ref to the subordinate PCI bus in case the bus is
* removed via PCI core logical hotplug. The ref pins the bus
* (which we access during module unload).
*/
get_device(&bridge->pci_bus->dev);
init_bridge_misc(bridge);
return;
err:
pci_dev_put(bridge->pci_dev);
kfree(bridge);
return;
}
/* callback routine to find P2P bridges */
static acpi_status
find_p2p_bridge(acpi_handle handle, u32 lvl, void *context, void **rv)
{
acpi_status status;
struct pci_dev *dev;
dev = acpi_get_pci_dev(handle);
if (!dev || !dev->subordinate)
goto out;
/* check if this bridge has ejectable slots */
if ((detect_ejectable_slots(handle) > 0)) {
dbg("found PCI-to-PCI bridge at PCI %s\n", pci_name(dev));
add_p2p_bridge(handle);
}
/* search P2P bridges under this p2p bridge */
status = acpi_walk_namespace(ACPI_TYPE_DEVICE, handle, (u32)1,
find_p2p_bridge, NULL, NULL, NULL);
if (ACPI_FAILURE(status))
warn("find_p2p_bridge failed (error code = 0x%x)\n", status);
out:
pci_dev_put(dev);
return AE_OK;
}
/* find hot-pluggable slots, and then find P2P bridge */
static int add_bridge(struct acpi_pci_root *root)
{
acpi_status status;
unsigned long long tmp;
acpi_handle dummy_handle;
acpi_handle handle = root->device->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\n", __func__);
return 0;
}
if ((tmp & ACPI_STA_FUNCTIONING) == 0)
/* don't register this object */
return 0;
}
/* check if this bridge has ejectable slots */
if (detect_ejectable_slots(handle) > 0) {
dbg("found PCI host-bus bridge with hot-pluggable slots\n");
add_host_bridge(root);
}
/* search P2P bridges under this host bridge */
status = acpi_walk_namespace(ACPI_TYPE_DEVICE, handle, (u32)1,
find_p2p_bridge, NULL, NULL, NULL);
if (ACPI_FAILURE(status))
warn("find_p2p_bridge failed (error code = 0x%x)\n", status);
return 0;
}
static struct acpiphp_bridge *acpiphp_handle_to_bridge(acpi_handle handle)
{
struct acpiphp_bridge *bridge;
mutex_lock(&bridge_mutex);
list_for_each_entry(bridge, &bridge_list, list)
if (bridge->handle == handle)
if (bridge->handle == handle) {
get_bridge(bridge);
mutex_unlock(&bridge_mutex);
return bridge;
}
mutex_unlock(&bridge_mutex);
return NULL;
}
static void cleanup_bridge(struct acpiphp_bridge *bridge)
{
struct acpiphp_slot *slot, *next;
struct acpiphp_func *func, *tmp;
struct acpiphp_slot *slot;
struct acpiphp_func *func;
acpi_status status;
acpi_handle handle = bridge->handle;
@ -543,10 +453,8 @@ static void cleanup_bridge(struct acpiphp_bridge *bridge)
err("failed to install interrupt notify handler\n");
}
slot = bridge->slots;
while (slot) {
next = slot->next;
list_for_each_entry_safe(func, tmp, &slot->funcs, sibling) {
list_for_each_entry(slot, &bridge->slots, node) {
list_for_each_entry(func, &slot->funcs, sibling) {
if (is_dock_device(func->handle)) {
unregister_hotplug_dock_device(func->handle);
unregister_dock_notifier(&func->nb);
@ -558,63 +466,13 @@ static void cleanup_bridge(struct acpiphp_bridge *bridge)
if (ACPI_FAILURE(status))
err("failed to remove notify handler\n");
}
list_del(&func->sibling);
kfree(func);
}
acpiphp_unregister_hotplug_slot(slot);
list_del(&slot->funcs);
kfree(slot);
slot = next;
}
/*
* Only P2P bridges have a pci_dev
*/
if (bridge->pci_dev)
put_device(&bridge->pci_bus->dev);
pci_dev_put(bridge->pci_dev);
mutex_lock(&bridge_mutex);
list_del(&bridge->list);
kfree(bridge);
}
static acpi_status
cleanup_p2p_bridge(acpi_handle handle, u32 lvl, void *context, void **rv)
{
struct acpiphp_bridge *bridge;
/* cleanup p2p bridges under this P2P bridge
in a depth-first manner */
acpi_walk_namespace(ACPI_TYPE_DEVICE, handle, (u32)1,
cleanup_p2p_bridge, NULL, NULL, NULL);
bridge = acpiphp_handle_to_bridge(handle);
if (bridge)
cleanup_bridge(bridge);
return AE_OK;
}
static void remove_bridge(struct acpi_pci_root *root)
{
struct acpiphp_bridge *bridge;
acpi_handle handle = root->device->handle;
/* cleanup p2p bridges under this host bridge
in a depth-first manner */
acpi_walk_namespace(ACPI_TYPE_DEVICE, handle,
(u32)1, cleanup_p2p_bridge, NULL, NULL, NULL);
/*
* On root bridges with hotplug slots directly underneath (ie,
* no p2p bridge between), we call cleanup_bridge().
*
* The else clause cleans up root bridges that either had no
* hotplug slots at all, or had a p2p bridge underneath.
*/
bridge = acpiphp_handle_to_bridge(handle);
if (bridge)
cleanup_bridge(bridge);
mutex_unlock(&bridge_mutex);
}
static int power_on_slot(struct acpiphp_slot *slot)
@ -798,6 +656,7 @@ static void check_hotplug_bridge(struct acpiphp_slot *slot, struct pci_dev *dev)
}
}
}
/**
* enable_device - enable, configure a slot
* @slot: slot to be enabled
@ -810,9 +669,7 @@ static int __ref enable_device(struct acpiphp_slot *slot)
struct pci_dev *dev;
struct pci_bus *bus = slot->bridge->pci_bus;
struct acpiphp_func *func;
int retval = 0;
int num, max, pass;
acpi_status status;
if (slot->flags & SLOT_ENABLED)
goto err_exit;
@ -867,23 +724,11 @@ static int __ref enable_device(struct acpiphp_slot *slot)
slot->flags &= (~SLOT_ENABLED);
continue;
}
if (dev->hdr_type != PCI_HEADER_TYPE_BRIDGE &&
dev->hdr_type != PCI_HEADER_TYPE_CARDBUS) {
pci_dev_put(dev);
continue;
}
status = find_p2p_bridge(func->handle, (u32)1, bus, NULL);
if (ACPI_FAILURE(status))
warn("find_p2p_bridge failed (error code = 0x%x)\n",
status);
pci_dev_put(dev);
}
err_exit:
return retval;
return 0;
}
/* return first device in slot, acquiring a reference on it */
@ -912,23 +757,6 @@ static int disable_device(struct acpiphp_slot *slot)
{
struct acpiphp_func *func;
struct pci_dev *pdev;
struct pci_bus *bus = slot->bridge->pci_bus;
/* The slot will be enabled when func 0 is added, so check
func 0 before disable the slot. */
pdev = pci_get_slot(bus, PCI_DEVFN(slot->device, 0));
if (!pdev)
goto err_exit;
pci_dev_put(pdev);
list_for_each_entry(func, &slot->funcs, sibling) {
if (func->bridge) {
/* cleanup p2p bridges under this P2P bridge */
cleanup_p2p_bridge(func->bridge->handle,
(u32)1, NULL, NULL);
func->bridge = NULL;
}
}
/*
* enable_device() enumerates all functions in this device via
@ -947,7 +775,6 @@ static int disable_device(struct acpiphp_slot *slot)
slot->flags &= (~SLOT_ENABLED);
err_exit:
return 0;
}
@ -1037,7 +864,7 @@ static int acpiphp_check_bridge(struct acpiphp_bridge *bridge)
enabled = disabled = 0;
for (slot = bridge->slots; slot; slot = slot->next) {
list_for_each_entry(slot, &bridge->slots, node) {
unsigned int status = get_slot_status(slot);
if (slot->flags & SLOT_ENABLED) {
if (status == ACPI_STA_ALL)
@ -1082,11 +909,11 @@ static void acpiphp_set_hpp_values(struct pci_bus *bus)
*/
static void acpiphp_sanitize_bus(struct pci_bus *bus)
{
struct pci_dev *dev;
struct pci_dev *dev, *tmp;
int i;
unsigned long type_mask = IORESOURCE_IO | IORESOURCE_MEM;
list_for_each_entry(dev, &bus->devices, bus_list) {
list_for_each_entry_safe(dev, tmp, &bus->devices, bus_list) {
for (i=0; i<PCI_BRIDGE_RESOURCES; i++) {
struct resource *res = &dev->resource[i];
if ((res->flags & type_mask) && !res->start &&
@ -1118,6 +945,7 @@ check_sub_bridges(acpi_handle handle, u32 lvl, void *context, void **rv)
dbg("%s: re-enumerating slots under %s\n",
__func__, objname);
acpiphp_check_bridge(bridge);
put_bridge(bridge);
}
return AE_OK ;
}
@ -1195,6 +1023,7 @@ static void _handle_hotplug_event_bridge(struct work_struct *work)
acpi_scan_lock_release();
kfree(hp_work); /* allocated in handle_hotplug_event_bridge */
put_bridge(bridge);
}
/**
@ -1208,6 +1037,8 @@ static void _handle_hotplug_event_bridge(struct work_struct *work)
static void handle_hotplug_event_bridge(acpi_handle handle, u32 type,
void *context)
{
struct acpiphp_bridge *bridge = context;
/*
* Currently the code adds all hotplug events to the kacpid_wq
* queue when it should add hotplug events to the kacpi_hotplug_wq.
@ -1216,6 +1047,7 @@ static void handle_hotplug_event_bridge(acpi_handle handle, u32 type,
* For now just re-add this work to the kacpi_hotplug_wq so we
* don't deadlock on hotplug actions.
*/
get_bridge(bridge);
alloc_acpi_hp_work(handle, type, context, _handle_hotplug_event_bridge);
}
@ -1270,6 +1102,7 @@ static void _handle_hotplug_event_func(struct work_struct *work)
acpi_scan_lock_release();
kfree(hp_work); /* allocated in handle_hotplug_event_func */
put_bridge(func->slot->bridge);
}
/**
@ -1283,6 +1116,8 @@ static void _handle_hotplug_event_func(struct work_struct *work)
static void handle_hotplug_event_func(acpi_handle handle, u32 type,
void *context)
{
struct acpiphp_func *func = context;
/*
* Currently the code adds all hotplug events to the kacpid_wq
* queue when it should add hotplug events to the kacpi_hotplug_wq.
@ -1291,33 +1126,69 @@ static void handle_hotplug_event_func(acpi_handle handle, u32 type,
* For now just re-add this work to the kacpi_hotplug_wq so we
* don't deadlock on hotplug actions.
*/
get_bridge(func->slot->bridge);
alloc_acpi_hp_work(handle, type, context, _handle_hotplug_event_func);
}
static struct acpi_pci_driver acpi_pci_hp_driver = {
.add = add_bridge,
.remove = remove_bridge,
};
/**
* acpiphp_glue_init - initializes all PCI hotplug - ACPI glue data structures
/*
* Create hotplug slots for the PCI bus.
* It should always return 0 to avoid skipping following notifiers.
*/
int __init acpiphp_glue_init(void)
void acpiphp_enumerate_slots(struct pci_bus *bus, acpi_handle handle)
{
acpi_pci_register_driver(&acpi_pci_hp_driver);
acpi_handle dummy_handle;
struct acpiphp_bridge *bridge;
return 0;
if (acpiphp_disabled)
return;
if (detect_ejectable_slots(handle) <= 0)
return;
bridge = kzalloc(sizeof(struct acpiphp_bridge), GFP_KERNEL);
if (bridge == NULL) {
err("out of memory\n");
return;
}
INIT_LIST_HEAD(&bridge->slots);
kref_init(&bridge->ref);
bridge->handle = handle;
bridge->pci_dev = pci_dev_get(bus->self);
bridge->pci_bus = bus;
/*
* Grab a ref to the subordinate PCI bus in case the bus is
* removed via PCI core logical hotplug. The ref pins the bus
* (which we access during module unload).
*/
get_device(&bus->dev);
if (!pci_is_root_bus(bridge->pci_bus) &&
ACPI_SUCCESS(acpi_get_handle(bridge->handle,
"_EJ0", &dummy_handle))) {
dbg("found ejectable p2p bridge\n");
bridge->flags |= BRIDGE_HAS_EJ0;
bridge->func = acpiphp_bridge_handle_to_function(handle);
}
init_bridge_misc(bridge);
}
/**
* 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)
/* Destroy hotplug slots associated with the PCI bus */
void acpiphp_remove_slots(struct pci_bus *bus)
{
acpi_pci_unregister_driver(&acpi_pci_hp_driver);
struct acpiphp_bridge *bridge, *tmp;
if (acpiphp_disabled)
return;
list_for_each_entry_safe(bridge, tmp, &bridge_list, list)
if (bridge->pci_bus == bus) {
cleanup_bridge(bridge);
put_bridge(bridge);
break;
}
}
/**
@ -1396,7 +1267,7 @@ u8 acpiphp_get_latch_status(struct acpiphp_slot *slot)
sta = get_slot_status(slot);
return (sta & ACPI_STA_SHOW_IN_UI) ? 0 : 1;
return (sta & ACPI_STA_DEVICE_UI) ? 0 : 1;
}

30
drivers/pci/pci-acpi.c
View File

@ -287,6 +287,32 @@ static struct pci_platform_pm_ops acpi_pci_platform_pm = {
.run_wake = acpi_pci_run_wake,
};
void acpi_pci_add_bus(struct pci_bus *bus)
{
acpi_handle handle = NULL;
if (bus->bridge)
handle = ACPI_HANDLE(bus->bridge);
if (acpi_pci_disabled || handle == NULL)
return;
acpi_pci_slot_enumerate(bus, handle);
acpiphp_enumerate_slots(bus, handle);
}
void acpi_pci_remove_bus(struct pci_bus *bus)
{
/*
* bus->bridge->acpi_node.handle has already been reset to NULL
* when acpi_pci_remove_bus() is called, so don't check ACPI handle.
*/
if (acpi_pci_disabled)
return;
acpiphp_remove_slots(bus);
acpi_pci_slot_remove(bus);
}
/* ACPI bus type */
static int acpi_pci_find_device(struct device *dev, acpi_handle *handle)
{
@ -361,7 +387,11 @@ static int __init acpi_pci_init(void)
ret = register_acpi_bus_type(&acpi_pci_bus);
if (ret)
return 0;
pci_set_platform_pm(&acpi_pci_platform_pm);
acpi_pci_slot_init();
acpiphp_init();
return 0;
}
arch_initcall(acpi_pci_init);

15
drivers/pci/probe.c
View File

@ -673,6 +673,8 @@ add_dev:
ret = device_register(&child->dev);
WARN_ON(ret < 0);
pcibios_add_bus(child);
/* Create legacy_io and legacy_mem files for this bus */
pci_create_legacy_files(child);
@ -1627,8 +1629,7 @@ unsigned int pci_scan_child_bus(struct pci_bus *bus)
if (!bus->is_added) {
dev_dbg(&bus->dev, "fixups for bus\n");
pcibios_fixup_bus(bus);
if (pci_is_root_bus(bus))
bus->is_added = 1;
bus->is_added = 1;
}
for (pass=0; pass < 2; pass++)
@ -1661,6 +1662,14 @@ int __weak pcibios_root_bridge_prepare(struct pci_host_bridge *bridge)
return 0;
}
void __weak pcibios_add_bus(struct pci_bus *bus)
{
}
void __weak pcibios_remove_bus(struct pci_bus *bus)
{
}
struct pci_bus *pci_create_root_bus(struct device *parent, int bus,
struct pci_ops *ops, void *sysdata, struct list_head *resources)
{
@ -1715,6 +1724,8 @@ struct pci_bus *pci_create_root_bus(struct device *parent, int bus,
if (error)
goto class_dev_reg_err;
pcibios_add_bus(b);
/* Create legacy_io and legacy_mem files for this bus */
pci_create_legacy_files(b);

4
drivers/pci/remove.c
View File

@ -50,10 +50,8 @@ void pci_remove_bus(struct pci_bus *bus)
list_del(&bus->node);
pci_bus_release_busn_res(bus);
up_write(&pci_bus_sem);
if (!bus->is_added)
return;
pci_remove_legacy_files(bus);
pcibios_remove_bus(bus);
device_unregister(&bus->dev);
}
EXPORT_SYMBOL(pci_remove_bus);

9
include/linux/acpi.h
View File

@ -152,15 +152,6 @@ void acpi_penalize_isa_irq(int irq, int active);
void acpi_pci_irq_disable (struct pci_dev *dev);
struct acpi_pci_driver {
struct list_head node;
int (*add)(struct acpi_pci_root *root);
void (*remove)(struct acpi_pci_root *root);
};
int acpi_pci_register_driver(struct acpi_pci_driver *driver);
void acpi_pci_unregister_driver(struct acpi_pci_driver *driver);
extern int ec_read(u8 addr, u8 *val);
extern int ec_write(u8 addr, u8 val);
extern int ec_transaction(u8 command,

29
include/linux/pci-acpi.h
View File

@ -41,8 +41,37 @@ static inline acpi_handle acpi_pci_get_bridge_handle(struct pci_bus *pbus)
return DEVICE_ACPI_HANDLE(dev);
}
void acpi_pci_add_bus(struct pci_bus *bus);
void acpi_pci_remove_bus(struct pci_bus *bus);
#ifdef CONFIG_ACPI_PCI_SLOT
void acpi_pci_slot_init(void);
void acpi_pci_slot_enumerate(struct pci_bus *bus, acpi_handle handle);
void acpi_pci_slot_remove(struct pci_bus *bus);
#else
static inline void acpi_pci_slot_init(void) { }
static inline void acpi_pci_slot_enumerate(struct pci_bus *bus,
acpi_handle handle) { }
static inline void acpi_pci_slot_remove(struct pci_bus *bus) { }
#endif
#ifdef CONFIG_HOTPLUG_PCI_ACPI
void acpiphp_init(void);
void acpiphp_enumerate_slots(struct pci_bus *bus, acpi_handle handle);
void acpiphp_remove_slots(struct pci_bus *bus);
#else
static inline void acpiphp_init(void) { }
static inline void acpiphp_enumerate_slots(struct pci_bus *bus,
acpi_handle handle) { }
static inline void acpiphp_remove_slots(struct pci_bus *bus) { }
#endif
#else /* CONFIG_ACPI */
static inline void acpi_pci_add_bus(struct pci_bus *bus) { }
static inline void acpi_pci_remove_bus(struct pci_bus *bus) { }
#endif /* CONFIG_ACPI */
#ifdef CONFIG_ACPI_APEI
extern bool aer_acpi_firmware_first(void);
#else

2
include/linux/pci.h
View File

@ -693,6 +693,8 @@ extern struct list_head pci_root_buses; /* list of all known PCI buses */
extern int no_pci_devices(void);
void pcibios_resource_survey_bus(struct pci_bus *bus);
void pcibios_add_bus(struct pci_bus *bus);
void pcibios_remove_bus(struct pci_bus *bus);
void pcibios_fixup_bus(struct pci_bus *);
int __must_check pcibios_enable_device(struct pci_dev *, int mask);
/* Architecture specific versions may override this (weak) */