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Date: Sat, 11 Oct 2008 02:35:55 -0400
From: Len Brown <lenb@...nel.org>
To: linux-acpi@...r.kernel.org, linux-kernel@...r.kernel.org
Cc: Shaohua Li <shaohua.li@...el.com>, Len Brown <len.brown@...el.com>
Subject: [PATCH 35/85] dock: introduce .uevent for devices in dock, eg libata
From: Shaohua Li <shaohua.li@...el.com>
dock's uevent reported itself, not ata. It might be difficult to find an
ata device just according to a dock. This patch introduces docking ops
for each device in a dock. when docking, dock driver can send device
specific uevent. This should help dock station too (not just bay)
Signed-off-by: Shaohua Li <shaohua.li@...el.com>
Acked-by: Tejun Heo <htejun@...il.com>
Signed-off-by: Len Brown <len.brown@...el.com>
---
drivers/acpi/dock.c | 22 ++++++++++++-----
drivers/ata/libata-acpi.c | 44 ++++++++++++++++++++++++++++++++++-
drivers/pci/hotplug/acpiphp_glue.c | 6 +++-
include/acpi/acpi_drivers.h | 9 +++++-
4 files changed, 68 insertions(+), 13 deletions(-)
diff --git a/drivers/acpi/dock.c b/drivers/acpi/dock.c
index f19f643..ac7dfef 100644
--- a/drivers/acpi/dock.c
+++ b/drivers/acpi/dock.c
@@ -75,7 +75,7 @@ struct dock_dependent_device {
struct list_head list;
struct list_head hotplug_list;
acpi_handle handle;
- acpi_notify_handler handler;
+ struct acpi_dock_ops *ops;
void *context;
};
@@ -385,8 +385,8 @@ static void hotplug_dock_devices(struct dock_station *ds, u32 event)
* First call driver specific hotplug functions
*/
list_for_each_entry(dd, &ds->hotplug_devices, hotplug_list) {
- if (dd->handler)
- dd->handler(dd->handle, event, dd->context);
+ if (dd->ops && dd->ops->handler)
+ dd->ops->handler(dd->handle, event, dd->context);
}
/*
@@ -409,6 +409,7 @@ static void dock_event(struct dock_station *ds, u32 event, int num)
struct device *dev = &ds->dock_device->dev;
char event_string[13];
char *envp[] = { event_string, NULL };
+ struct dock_dependent_device *dd;
if (num == UNDOCK_EVENT)
sprintf(event_string, "EVENT=undock");
@@ -419,7 +420,14 @@ static void dock_event(struct dock_station *ds, u32 event, int num)
* Indicate that the status of the dock station has
* changed.
*/
- kobject_uevent_env(&dev->kobj, KOBJ_CHANGE, envp);
+ if (num == DOCK_EVENT)
+ kobject_uevent_env(&dev->kobj, KOBJ_CHANGE, envp);
+
+ list_for_each_entry(dd, &ds->hotplug_devices, hotplug_list)
+ if (dd->ops && dd->ops->uevent)
+ dd->ops->uevent(dd->handle, event, dd->context);
+ if (num != DOCK_EVENT)
+ kobject_uevent_env(&dev->kobj, KOBJ_CHANGE, envp);
}
/**
@@ -588,7 +596,7 @@ EXPORT_SYMBOL_GPL(unregister_dock_notifier);
/**
* register_hotplug_dock_device - register a hotplug function
* @handle: the handle of the device
- * @handler: the acpi_notifier_handler to call after docking
+ * @ops: handlers to call after docking
* @context: device specific data
*
* If a driver would like to perform a hotplug operation after a dock
@@ -596,7 +604,7 @@ EXPORT_SYMBOL_GPL(unregister_dock_notifier);
* the dock driver after _DCK is executed.
*/
int
-register_hotplug_dock_device(acpi_handle handle, acpi_notify_handler handler,
+register_hotplug_dock_device(acpi_handle handle, struct acpi_dock_ops *ops,
void *context)
{
struct dock_dependent_device *dd;
@@ -612,7 +620,7 @@ register_hotplug_dock_device(acpi_handle handle, acpi_notify_handler handler,
list_for_each_entry(dock_station, &dock_stations, sibiling) {
dd = find_dock_dependent_device(dock_station, handle);
if (dd) {
- dd->handler = handler;
+ dd->ops = ops;
dd->context = context;
dock_add_hotplug_device(dock_station, dd);
return 0;
diff --git a/drivers/ata/libata-acpi.c b/drivers/ata/libata-acpi.c
index 97727be..c012307 100644
--- a/drivers/ata/libata-acpi.c
+++ b/drivers/ata/libata-acpi.c
@@ -209,6 +209,46 @@ static void ata_acpi_ap_notify_dock(acpi_handle handle, u32 event, void *data)
ata_acpi_handle_hotplug(ap, NULL, event);
}
+static void ata_acpi_uevent(struct ata_port *ap, struct ata_device *dev,
+ u32 event)
+{
+ struct kobject *kobj = NULL;
+ char event_string[20];
+ char *envp[] = { event_string, NULL };
+
+ if (dev) {
+ if (dev->sdev)
+ kobj = &dev->sdev->sdev_gendev.kobj;
+ } else
+ kobj = &ap->dev->kobj;
+
+ if (kobj) {
+ snprintf(event_string, 20, "BAY_EVENT=%d", event);
+ kobject_uevent_env(kobj, KOBJ_CHANGE, envp);
+ }
+}
+
+static void ata_acpi_ap_uevent(acpi_handle handle, u32 event, void *data)
+{
+ ata_acpi_uevent(data, NULL, event);
+}
+
+static void ata_acpi_dev_uevent(acpi_handle handle, u32 event, void *data)
+{
+ struct ata_device *dev = data;
+ ata_acpi_uevent(dev->link->ap, dev, event);
+}
+
+static struct acpi_dock_ops ata_acpi_dev_dock_ops = {
+ .handler = ata_acpi_dev_notify_dock,
+ .uevent = ata_acpi_dev_uevent,
+};
+
+static struct acpi_dock_ops ata_acpi_ap_dock_ops = {
+ .handler = ata_acpi_ap_notify_dock,
+ .uevent = ata_acpi_ap_uevent,
+};
+
/**
* ata_acpi_associate - associate ATA host with ACPI objects
* @host: target ATA host
@@ -244,7 +284,7 @@ void ata_acpi_associate(struct ata_host *host)
if (ap->acpi_handle) {
/* we might be on a docking station */
register_hotplug_dock_device(ap->acpi_handle,
- ata_acpi_ap_notify_dock, ap);
+ &ata_acpi_ap_dock_ops, ap);
}
for (j = 0; j < ata_link_max_devices(&ap->link); j++) {
@@ -253,7 +293,7 @@ void ata_acpi_associate(struct ata_host *host)
if (dev->acpi_handle) {
/* we might be on a docking station */
register_hotplug_dock_device(dev->acpi_handle,
- ata_acpi_dev_notify_dock, dev);
+ &ata_acpi_dev_dock_ops, dev);
}
}
}
diff --git a/drivers/pci/hotplug/acpiphp_glue.c b/drivers/pci/hotplug/acpiphp_glue.c
index a3e4705..db54c5e 100644
--- a/drivers/pci/hotplug/acpiphp_glue.c
+++ b/drivers/pci/hotplug/acpiphp_glue.c
@@ -169,7 +169,9 @@ static int post_dock_fixups(struct notifier_block *nb, unsigned long val,
}
-
+static struct acpi_dock_ops acpiphp_dock_ops = {
+ .handler = handle_hotplug_event_func,
+};
/* callback routine to register each ACPI PCI slot object */
static acpi_status
@@ -285,7 +287,7 @@ register_slot(acpi_handle handle, u32 lvl, void *context, void **rv)
*/
newfunc->flags &= ~FUNC_HAS_EJ0;
if (register_hotplug_dock_device(handle,
- handle_hotplug_event_func, newfunc))
+ &acpiphp_dock_ops, newfunc))
dbg("failed to register dock device\n");
/* we need to be notified when dock events happen
diff --git a/include/acpi/acpi_drivers.h b/include/acpi/acpi_drivers.h
index e5f38e5..4f5042a 100644
--- a/include/acpi/acpi_drivers.h
+++ b/include/acpi/acpi_drivers.h
@@ -115,12 +115,17 @@ int acpi_processor_set_thermal_limit(acpi_handle handle, int type);
/*--------------------------------------------------------------------------
Dock Station
-------------------------------------------------------------------------- */
+struct acpi_dock_ops {
+ acpi_notify_handler handler;
+ acpi_notify_handler uevent;
+};
+
#if defined(CONFIG_ACPI_DOCK) || defined(CONFIG_ACPI_DOCK_MODULE)
extern int is_dock_device(acpi_handle handle);
extern int register_dock_notifier(struct notifier_block *nb);
extern void unregister_dock_notifier(struct notifier_block *nb);
extern int register_hotplug_dock_device(acpi_handle handle,
- acpi_notify_handler handler,
+ struct acpi_dock_ops *ops,
void *context);
extern void unregister_hotplug_dock_device(acpi_handle handle);
#else
@@ -136,7 +141,7 @@ static inline void unregister_dock_notifier(struct notifier_block *nb)
{
}
static inline int register_hotplug_dock_device(acpi_handle handle,
- acpi_notify_handler handler,
+ struct acpi_dock_ops *ops,
void *context)
{
return -ENODEV;
--
1.5.5.1
--
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