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authorMika Westerberg <mika.westerberg@linux.intel.com>2018-09-27 16:57:05 -0500
committerBjorn Helgaas <bhelgaas@google.com>2018-10-02 16:04:40 -0500
commit5f5e4890d57a8af5da72c9d73a4efa9bad43a7a3 (patch)
treec42b2d3b6b43b5727309317840c136d3ec018846 /include/acpi
parent0e157e52860441cb26051f131dd0b5ae3187a07b (diff)
downloadlinux-5f5e4890d57a8af5da72c9d73a4efa9bad43a7a3.tar.bz2
ACPI / property: Allow multiple property compatible _DSD entries
It is possible to have _DSD entries where the data is compatible with device properties format but are using different GUID for various reasons. In addition to that there can be many such _DSD entries for a single device such as for PCIe root port used to host a Thunderbolt hierarchy: Scope (\_SB.PCI0.RP21) { Name (_DSD, Package () { ToUUID ("6211e2c0-58a3-4af3-90e1-927a4e0c55a4"), Package () { Package () {"HotPlugSupportInD3", 1} }, ToUUID ("efcc06cc-73ac-4bc3-bff0-76143807c389"), Package () { Package () {"ExternalFacingPort", 1}, Package () {"UID", 0 } } }) } More information about these new _DSD entries can be found in: https://docs.microsoft.com/en-us/windows-hardware/drivers/pci/dsd-for-pcie-root-ports To make these available for drivers via unified device property APIs, modify ACPI property core so that it supports multiple _DSD entries organized in a linked list. We also store GUID of each _DSD entry in struct acpi_device_properties in case there is need to differentiate between entries. The supported GUIDs are then listed in prp_guids array. Signed-off-by: Mika Westerberg <mika.westerberg@linux.intel.com> Signed-off-by: Bjorn Helgaas <bhelgaas@google.com> Reviewed-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com> Acked-by: Sakari Ailus <sakari.ailus@linux.intel.com>
Diffstat (limited to 'include/acpi')
-rw-r--r--include/acpi/acpi_bus.h8
1 files changed, 7 insertions, 1 deletions
diff --git a/include/acpi/acpi_bus.h b/include/acpi/acpi_bus.h
index ba4dd54f2c82..cd35e3ce9a8b 100644
--- a/include/acpi/acpi_bus.h
+++ b/include/acpi/acpi_bus.h
@@ -346,10 +346,16 @@ struct acpi_device_physical_node {
bool put_online:1;
};
+struct acpi_device_properties {
+ const guid_t *guid;
+ const union acpi_object *properties;
+ struct list_head list;
+};
+
/* ACPI Device Specific Data (_DSD) */
struct acpi_device_data {
const union acpi_object *pointer;
- const union acpi_object *properties;
+ struct list_head properties;
const union acpi_object *of_compatible;
struct list_head subnodes;
};