#include <linux/init.h>
#include <linux/mount.h>
#include <linux/namei.h>
+#include <linux/mutex.h>
#include <linux/pci.h>
#include <linux/pci_hotplug.h>
#include <asm/uaccess.h>
//////////////////////////////////////////////////////////////////
static LIST_HEAD(pci_hotplug_slot_list);
-static DEFINE_SPINLOCK(pci_hotplug_slot_list_lock);
+static DEFINE_MUTEX(pci_hp_mutex);
/* these strings match up with the values in pci_bus_speed */
static char *pci_bus_speed_strings[] = {
.store = test_write_file
};
-static int has_power_file(struct pci_slot *pci_slot)
+static bool has_power_file(struct pci_slot *pci_slot)
{
struct hotplug_slot *slot = pci_slot->hotplug;
if ((!slot) || (!slot->ops))
- return -ENODEV;
+ return false;
if ((slot->ops->enable_slot) ||
(slot->ops->disable_slot) ||
(slot->ops->get_power_status))
- return 0;
- return -ENOENT;
+ return true;
+ return false;
}
-static int has_attention_file(struct pci_slot *pci_slot)
+static bool has_attention_file(struct pci_slot *pci_slot)
{
struct hotplug_slot *slot = pci_slot->hotplug;
if ((!slot) || (!slot->ops))
- return -ENODEV;
+ return false;
if ((slot->ops->set_attention_status) ||
(slot->ops->get_attention_status))
- return 0;
- return -ENOENT;
+ return true;
+ return false;
}
-static int has_latch_file(struct pci_slot *pci_slot)
+static bool has_latch_file(struct pci_slot *pci_slot)
{
struct hotplug_slot *slot = pci_slot->hotplug;
if ((!slot) || (!slot->ops))
- return -ENODEV;
+ return false;
if (slot->ops->get_latch_status)
- return 0;
- return -ENOENT;
+ return true;
+ return false;
}
-static int has_adapter_file(struct pci_slot *pci_slot)
+static bool has_adapter_file(struct pci_slot *pci_slot)
{
struct hotplug_slot *slot = pci_slot->hotplug;
if ((!slot) || (!slot->ops))
- return -ENODEV;
+ return false;
if (slot->ops->get_adapter_status)
- return 0;
- return -ENOENT;
+ return true;
+ return false;
}
-static int has_max_bus_speed_file(struct pci_slot *pci_slot)
+static bool has_max_bus_speed_file(struct pci_slot *pci_slot)
{
struct hotplug_slot *slot = pci_slot->hotplug;
if ((!slot) || (!slot->ops))
- return -ENODEV;
+ return false;
if (slot->ops->get_max_bus_speed)
- return 0;
- return -ENOENT;
+ return true;
+ return false;
}
-static int has_cur_bus_speed_file(struct pci_slot *pci_slot)
+static bool has_cur_bus_speed_file(struct pci_slot *pci_slot)
{
struct hotplug_slot *slot = pci_slot->hotplug;
if ((!slot) || (!slot->ops))
- return -ENODEV;
+ return false;
if (slot->ops->get_cur_bus_speed)
- return 0;
- return -ENOENT;
+ return true;
+ return false;
}
-static int has_test_file(struct pci_slot *pci_slot)
+static bool has_test_file(struct pci_slot *pci_slot)
{
struct hotplug_slot *slot = pci_slot->hotplug;
if ((!slot) || (!slot->ops))
- return -ENODEV;
+ return false;
if (slot->ops->hardware_test)
- return 0;
- return -ENOENT;
+ return true;
+ return false;
}
static int fs_add_slot(struct pci_slot *slot)
{
int retval = 0;
- if (has_power_file(slot) == 0) {
- retval = sysfs_create_file(&slot->kobj, &hotplug_slot_attr_power.attr);
+ /* Create symbolic link to the hotplug driver module */
+ pci_hp_create_module_link(slot);
+
+ if (has_power_file(slot)) {
+ retval = sysfs_create_file(&slot->kobj,
+ &hotplug_slot_attr_power.attr);
if (retval)
goto exit_power;
}
- if (has_attention_file(slot) == 0) {
+ if (has_attention_file(slot)) {
retval = sysfs_create_file(&slot->kobj,
&hotplug_slot_attr_attention.attr);
if (retval)
goto exit_attention;
}
- if (has_latch_file(slot) == 0) {
+ if (has_latch_file(slot)) {
retval = sysfs_create_file(&slot->kobj,
&hotplug_slot_attr_latch.attr);
if (retval)
goto exit_latch;
}
- if (has_adapter_file(slot) == 0) {
+ if (has_adapter_file(slot)) {
retval = sysfs_create_file(&slot->kobj,
&hotplug_slot_attr_presence.attr);
if (retval)
goto exit_adapter;
}
- if (has_max_bus_speed_file(slot) == 0) {
+ if (has_max_bus_speed_file(slot)) {
retval = sysfs_create_file(&slot->kobj,
- &hotplug_slot_attr_max_bus_speed.attr);
+ &hotplug_slot_attr_max_bus_speed.attr);
if (retval)
goto exit_max_speed;
}
- if (has_cur_bus_speed_file(slot) == 0) {
+ if (has_cur_bus_speed_file(slot)) {
retval = sysfs_create_file(&slot->kobj,
- &hotplug_slot_attr_cur_bus_speed.attr);
+ &hotplug_slot_attr_cur_bus_speed.attr);
if (retval)
goto exit_cur_speed;
}
- if (has_test_file(slot) == 0) {
+ if (has_test_file(slot)) {
retval = sysfs_create_file(&slot->kobj,
&hotplug_slot_attr_test.attr);
if (retval)
goto exit;
exit_test:
- if (has_cur_bus_speed_file(slot) == 0)
- sysfs_remove_file(&slot->kobj, &hotplug_slot_attr_cur_bus_speed.attr);
-
+ if (has_cur_bus_speed_file(slot))
+ sysfs_remove_file(&slot->kobj,
+ &hotplug_slot_attr_cur_bus_speed.attr);
exit_cur_speed:
- if (has_max_bus_speed_file(slot) == 0)
- sysfs_remove_file(&slot->kobj, &hotplug_slot_attr_max_bus_speed.attr);
-
+ if (has_max_bus_speed_file(slot))
+ sysfs_remove_file(&slot->kobj,
+ &hotplug_slot_attr_max_bus_speed.attr);
exit_max_speed:
- if (has_adapter_file(slot) == 0)
- sysfs_remove_file(&slot->kobj, &hotplug_slot_attr_presence.attr);
-
+ if (has_adapter_file(slot))
+ sysfs_remove_file(&slot->kobj,
+ &hotplug_slot_attr_presence.attr);
exit_adapter:
- if (has_latch_file(slot) == 0)
+ if (has_latch_file(slot))
sysfs_remove_file(&slot->kobj, &hotplug_slot_attr_latch.attr);
-
exit_latch:
- if (has_attention_file(slot) == 0)
- sysfs_remove_file(&slot->kobj, &hotplug_slot_attr_attention.attr);
-
+ if (has_attention_file(slot))
+ sysfs_remove_file(&slot->kobj,
+ &hotplug_slot_attr_attention.attr);
exit_attention:
- if (has_power_file(slot) == 0)
+ if (has_power_file(slot))
sysfs_remove_file(&slot->kobj, &hotplug_slot_attr_power.attr);
exit_power:
+ pci_hp_remove_module_link(slot);
exit:
return retval;
}
static void fs_remove_slot(struct pci_slot *slot)
{
- if (has_power_file(slot) == 0)
+ if (has_power_file(slot))
sysfs_remove_file(&slot->kobj, &hotplug_slot_attr_power.attr);
- if (has_attention_file(slot) == 0)
- sysfs_remove_file(&slot->kobj, &hotplug_slot_attr_attention.attr);
+ if (has_attention_file(slot))
+ sysfs_remove_file(&slot->kobj,
+ &hotplug_slot_attr_attention.attr);
- if (has_latch_file(slot) == 0)
+ if (has_latch_file(slot))
sysfs_remove_file(&slot->kobj, &hotplug_slot_attr_latch.attr);
- if (has_adapter_file(slot) == 0)
- sysfs_remove_file(&slot->kobj, &hotplug_slot_attr_presence.attr);
+ if (has_adapter_file(slot))
+ sysfs_remove_file(&slot->kobj,
+ &hotplug_slot_attr_presence.attr);
- if (has_max_bus_speed_file(slot) == 0)
- sysfs_remove_file(&slot->kobj, &hotplug_slot_attr_max_bus_speed.attr);
+ if (has_max_bus_speed_file(slot))
+ sysfs_remove_file(&slot->kobj,
+ &hotplug_slot_attr_max_bus_speed.attr);
- if (has_cur_bus_speed_file(slot) == 0)
- sysfs_remove_file(&slot->kobj, &hotplug_slot_attr_cur_bus_speed.attr);
+ if (has_cur_bus_speed_file(slot))
+ sysfs_remove_file(&slot->kobj,
+ &hotplug_slot_attr_cur_bus_speed.attr);
- if (has_test_file(slot) == 0)
+ if (has_test_file(slot))
sysfs_remove_file(&slot->kobj, &hotplug_slot_attr_test.attr);
+
+ pci_hp_remove_module_link(slot);
}
static struct hotplug_slot *get_slot_from_name (const char *name)
struct hotplug_slot *slot;
struct list_head *tmp;
- spin_lock(&pci_hotplug_slot_list_lock);
list_for_each (tmp, &pci_hotplug_slot_list) {
slot = list_entry (tmp, struct hotplug_slot, slot_list);
- if (strcmp(slot->name, name) == 0)
- goto out;
+ if (strcmp(hotplug_slot_name(slot), name) == 0)
+ return slot;
}
- slot = NULL;
-out:
- spin_unlock(&pci_hotplug_slot_list_lock);
- return slot;
+ return NULL;
}
/**
- * pci_hp_register - register a hotplug_slot with the PCI hotplug subsystem
+ * __pci_hp_register - register a hotplug_slot with the PCI hotplug subsystem
* @bus: bus this slot is on
* @slot: pointer to the &struct hotplug_slot to register
- * @slot_nr: slot number
+ * @devnr: device number
+ * @name: name registered with kobject core
+ * @owner: caller module owner
+ * @mod_name: caller module name
*
* Registers a hotplug slot with the pci hotplug subsystem, which will allow
* userspace interaction to the slot.
*
* Returns 0 if successful, anything else for an error.
*/
-int pci_hp_register(struct hotplug_slot *slot, struct pci_bus *bus, int slot_nr)
+int __pci_hp_register(struct hotplug_slot *slot, struct pci_bus *bus,
+ int devnr, const char *name,
+ struct module *owner, const char *mod_name)
{
int result;
struct pci_slot *pci_slot;
return -EINVAL;
}
- /* Check if we have already registered a slot with the same name. */
- if (get_slot_from_name(slot->name))
- return -EEXIST;
+ slot->ops->owner = owner;
+ slot->ops->mod_name = mod_name;
+ mutex_lock(&pci_hp_mutex);
/*
* No problems if we call this interface from both ACPI_PCI_SLOT
* driver and call it here again. If we've already created the
* pci_slot, the interface will simply bump the refcount.
*/
- pci_slot = pci_create_slot(bus, slot_nr, slot->name);
- if (IS_ERR(pci_slot))
- return PTR_ERR(pci_slot);
-
- if (pci_slot->hotplug) {
- dbg("%s: already claimed\n", __func__);
- pci_destroy_slot(pci_slot);
- return -EBUSY;
+ pci_slot = pci_create_slot(bus, devnr, name, slot);
+ if (IS_ERR(pci_slot)) {
+ result = PTR_ERR(pci_slot);
+ goto out;
}
slot->pci_slot = pci_slot;
pci_slot->hotplug = slot;
- /*
- * Allow pcihp drivers to override the ACPI_PCI_SLOT name.
- */
- if (strcmp(kobject_name(&pci_slot->kobj), slot->name)) {
- result = kobject_rename(&pci_slot->kobj, slot->name);
- if (result) {
- pci_destroy_slot(pci_slot);
- return result;
- }
- }
-
- spin_lock(&pci_hotplug_slot_list_lock);
list_add(&slot->slot_list, &pci_hotplug_slot_list);
- spin_unlock(&pci_hotplug_slot_list_lock);
result = fs_add_slot(pci_slot);
kobject_uevent(&pci_slot->kobj, KOBJ_ADD);
- dbg("Added slot %s to the list\n", slot->name);
-
-
+ dbg("Added slot %s to the list\n", name);
+out:
+ mutex_unlock(&pci_hp_mutex);
return result;
}
if (!hotplug)
return -ENODEV;
- temp = get_slot_from_name(hotplug->name);
- if (temp != hotplug)
+ mutex_lock(&pci_hp_mutex);
+ temp = get_slot_from_name(hotplug_slot_name(hotplug));
+ if (temp != hotplug) {
+ mutex_unlock(&pci_hp_mutex);
return -ENODEV;
+ }
- spin_lock(&pci_hotplug_slot_list_lock);
list_del(&hotplug->slot_list);
- spin_unlock(&pci_hotplug_slot_list_lock);
slot = hotplug->pci_slot;
fs_remove_slot(slot);
- dbg("Removed slot %s from the list\n", hotplug->name);
+ dbg("Removed slot %s from the list\n", hotplug_slot_name(hotplug));
hotplug->release(hotplug);
slot->hotplug = NULL;
pci_destroy_slot(slot);
+ mutex_unlock(&pci_hp_mutex);
return 0;
}
module_param(debug, bool, 0644);
MODULE_PARM_DESC(debug, "Debugging mode enabled or not");
-EXPORT_SYMBOL_GPL(pci_hp_register);
+EXPORT_SYMBOL_GPL(__pci_hp_register);
EXPORT_SYMBOL_GPL(pci_hp_deregister);
EXPORT_SYMBOL_GPL(pci_hp_change_slot_info);
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