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s390/pci/hotplug: convert to be builtin only 

Convert s390' pci hotplug to be builtin only, with no module option.

Suggested-by: Bjorn Helgaas <bhelgaas@google.com>
Signed-off-by: Sebastian Ott <sebott@linux.vnet.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
This commit is contained in:
Sebastian Ott 2013-08-29 19:33:16 +02:00 committed by Martin Schwidefsky
parent 0944fe3f4a
commit 67f43f38ee
4 changed files with 20 additions and 101 deletions
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24
arch/s390/include/asm/pci.h
View File

@ -116,11 +116,6 @@ struct zpci_dev {
struct dentry *debugfs_perf;
};
struct pci_hp_callback_ops {
int (*create_slot) (struct zpci_dev *zdev);
void (*remove_slot) (struct zpci_dev *zdev);
};
static inline bool zdev_enabled(struct zpci_dev *zdev)
{
return (zdev->fh & (1UL << 31)) ? true : false;
@ -154,6 +149,17 @@ static inline void zpci_event_error(void *e) {}
static inline void zpci_event_availability(void *e) {}
#endif /* CONFIG_PCI */
#ifdef CONFIG_HOTPLUG_PCI_S390
int zpci_init_slot(struct zpci_dev *);
void zpci_exit_slot(struct zpci_dev *);
#else /* CONFIG_HOTPLUG_PCI_S390 */
static inline int zpci_init_slot(struct zpci_dev *zdev)
{
return 0;
}
static inline void zpci_exit_slot(struct zpci_dev *zdev) {}
#endif /* CONFIG_HOTPLUG_PCI_S390 */
/* Helpers */
struct zpci_dev *get_zdev(struct pci_dev *);
struct zpci_dev *get_zdev_by_fid(u32);
@ -167,14 +173,6 @@ void zpci_sysfs_remove_device(struct device *);
int zpci_dma_init(void);
void zpci_dma_exit(void);
/* Hotplug */
extern struct mutex zpci_list_lock;
extern struct list_head zpci_list;
extern unsigned int s390_pci_probe;
void zpci_register_hp_ops(struct pci_hp_callback_ops *);
void zpci_deregister_hp_ops(void);
/* FMB */
int zpci_fmb_enable_device(struct zpci_dev *);
int zpci_fmb_disable_device(struct zpci_dev *);

34
arch/s390/pci/pci.c
View File

@ -45,11 +45,8 @@
#define ZPCI_NR_DEVICES CONFIG_PCI_NR_FUNCTIONS
/* list of all detected zpci devices */
LIST_HEAD(zpci_list);
EXPORT_SYMBOL_GPL(zpci_list);
DEFINE_MUTEX(zpci_list_lock);
EXPORT_SYMBOL_GPL(zpci_list_lock);
static LIST_HEAD(zpci_list);
static DEFINE_MUTEX(zpci_list_lock);
static void zpci_enable_irq(struct irq_data *data);
static void zpci_disable_irq(struct irq_data *data);
@ -60,8 +57,6 @@ static struct irq_chip zpci_irq_chip = {
.irq_mask = zpci_disable_irq,
};
static struct pci_hp_callback_ops *hotplug_ops;
static DECLARE_BITMAP(zpci_domain, ZPCI_NR_DEVICES);
static DEFINE_SPINLOCK(zpci_domain_lock);
@ -828,10 +823,10 @@ int zpci_create_device(struct zpci_dev *zdev)
mutex_lock(&zpci_list_lock);
list_add_tail(&zdev->entry, &zpci_list);
if (hotplug_ops)
hotplug_ops->create_slot(zdev);
mutex_unlock(&zpci_list_lock);
zpci_init_slot(zdev);
return 0;
out_disable:
@ -884,24 +879,7 @@ static void zpci_mem_exit(void)
kmem_cache_destroy(zdev_fmb_cache);
}
void zpci_register_hp_ops(struct pci_hp_callback_ops *ops)
{
mutex_lock(&zpci_list_lock);
hotplug_ops = ops;
mutex_unlock(&zpci_list_lock);
}
EXPORT_SYMBOL_GPL(zpci_register_hp_ops);
void zpci_deregister_hp_ops(void)
{
mutex_lock(&zpci_list_lock);
hotplug_ops = NULL;
mutex_unlock(&zpci_list_lock);
}
EXPORT_SYMBOL_GPL(zpci_deregister_hp_ops);
unsigned int s390_pci_probe;
EXPORT_SYMBOL_GPL(s390_pci_probe);
static unsigned int s390_pci_probe;
char * __init pcibios_setup(char *str)
{
@ -960,4 +938,4 @@ out_mem:
out:
return rc;
}
subsys_initcall(pci_base_init);
subsys_initcall_sync(pci_base_init);

2
drivers/pci/hotplug/Kconfig
View File

@ -146,7 +146,7 @@ config HOTPLUG_PCI_SGI
When in doubt, say N.
config HOTPLUG_PCI_S390
tristate "System z PCI Hotplug Support"
bool "System z PCI Hotplug Support"
depends on S390 && 64BIT
help
Say Y here if you want to use the System z PCI Hotplug

61
drivers/pci/hotplug/s390_pci_hpc.c
View File

@ -148,7 +148,7 @@ static struct hotplug_slot_ops s390_hotplug_slot_ops = {
.get_adapter_status = get_adapter_status,
};
static int init_pci_slot(struct zpci_dev *zdev)
int zpci_init_slot(struct zpci_dev *zdev)
{
struct hotplug_slot *hotplug_slot;
struct hotplug_slot_info *info;
@ -202,7 +202,7 @@ error:
return -ENOMEM;
}
static void exit_pci_slot(struct zpci_dev *zdev)
void zpci_exit_slot(struct zpci_dev *zdev)
{
struct list_head *tmp, *n;
struct slot *slot;
@ -215,60 +215,3 @@ static void exit_pci_slot(struct zpci_dev *zdev)
pci_hp_deregister(slot->hotplug_slot);
}
}
static struct pci_hp_callback_ops hp_ops = {
.create_slot = init_pci_slot,
.remove_slot = exit_pci_slot,
};
static void __init init_pci_slots(void)
{
struct zpci_dev *zdev;
/*
* Create a structure for each slot, and register that slot
* with the pci_hotplug subsystem.
*/
mutex_lock(&zpci_list_lock);
list_for_each_entry(zdev, &zpci_list, entry) {
init_pci_slot(zdev);
}
mutex_unlock(&zpci_list_lock);
}
static void __exit exit_pci_slots(void)
{
struct list_head *tmp, *n;
struct slot *slot;
/*
* Unregister all of our slots with the pci_hotplug subsystem.
* Memory will be freed in release_slot() callback after slot's
* lifespan is finished.
*/
list_for_each_safe(tmp, n, &s390_hotplug_slot_list) {
slot = list_entry(tmp, struct slot, slot_list);
list_del(&slot->slot_list);
pci_hp_deregister(slot->hotplug_slot);
}
}
static int __init pci_hotplug_s390_init(void)
{
if (!s390_pci_probe)
return -EOPNOTSUPP;
zpci_register_hp_ops(&hp_ops);
init_pci_slots();
return 0;
}
static void __exit pci_hotplug_s390_exit(void)
{
exit_pci_slots();
zpci_deregister_hp_ops();
}
module_init(pci_hotplug_s390_init);
module_exit(pci_hotplug_s390_exit);