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PCI/ACPI: Prepare stub functions to handle ACPI PCI (hotplug) slots

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Prepare two stub functions to handle ACPI PCI slots and ACPI PCI hotplug
slots, which will be invoked by the PCI core when creating/destroying
PCI buses.

It will be used to get rid of ACPI PCI subdrivers for pci_slot and
acpiphp, and eventually remove the ACPI PCI subdriver mechanism.

And it will also be used to handle ACPI PCI (hotplug) slots in a unified
way, both at boot time and for PCI hotplug operations.

Signed-off-by: Jiang Liu <jiang.liu@huawei.com>
Signed-off-by: Yijing Wang <wangyijing@huawei.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Reviewed-by: Yinghai Lu <yinghai@kernel.org>
Cc: "Rafael J. Wysocki" <rafael.j.wysocki@intel.com>
Cc: Toshi Kani <toshi.kani@hp.com>
Cc: Tony Luck <tony.luck@intel.com>
Cc: Fenghua Yu <fenghua.yu@intel.com>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: "H. Peter Anvin" <hpa@zytor.com>
Cc: Myron Stowe <myron.stowe@redhat.com>
This commit is contained in:
Jiang Liu 2013-04-12 05:44:21 +00:00 committed by Bjorn Helgaas
parent 10a9574756
commit 5090d4a6a1
2 changed files with 31 additions and 1 deletions
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24
drivers/pci/pci-acpi.c
View File

@ -287,6 +287,30 @@ 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;
/* TODO: add PCI slots and acpiphp hotplug slots */
}
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;
/* TODO: remove PCI slots and acpiphp hotplug slots */
}
/* ACPI bus type */
static int acpi_pci_find_device(struct device *dev, acpi_handle *handle)
{

8
include/linux/pci-acpi.h
View File

@ -41,7 +41,13 @@ static inline acpi_handle acpi_pci_get_bridge_handle(struct pci_bus *pbus)
return DEVICE_ACPI_HANDLE(dev);
}
#endif
void acpi_pci_add_bus(struct pci_bus *bus);
void acpi_pci_remove_bus(struct pci_bus *bus);
#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);