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PCI: Make a shareable UUID for PCI firmware ACPI _DSM 

The PCI Firmware Specification, r3.0, sec 4.6.4.1.3, defines a single UUID
for an ACPI _DSM method to provide device-specific control functions.  This
_DSM method support several functions, including PCI Express Slot
Information, PCI Express Slot Number, PCI Bus Capabilities, etc.

Move the UUID definition from pci/pci-label.c, where it could be used only
for one function, to pci/pci-acpi.c where it can be shared for all these
functions.

[bhelgaas: changelog]
Signed-off-by: Aaron Lu <aaron.lu@intel.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Acked-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
This commit is contained in:
Aaron Lu 2015-03-25 14:31:41 +08:00 committed by Bjorn Helgaas
parent c89ac44330
commit 18e94a3384
3 changed files with 14 additions and 9 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

9
drivers/pci/pci-acpi.c
View File

@ -18,6 +18,15 @@
#include <linux/pm_qos.h>
#include "pci.h"
/*
* The UUID is defined in the PCI Firmware Specification available here:
* https://www.pcisig.com/members/downloads/pcifw_r3_1_13Dec10.pdf
*/
const u8 pci_acpi_dsm_uuid[] = {
0xd0, 0x37, 0xc9, 0xe5, 0x53, 0x35, 0x7a, 0x4d,
0x91, 0x17, 0xea, 0x4d, 0x19, 0xc3, 0x43, 0x4d
};
phys_addr_t acpi_pci_root_get_mcfg_addr(acpi_handle handle)
{
acpi_status status = AE_NOT_EXIST;

11
drivers/pci/pci-label.c
View File

@ -31,8 +31,6 @@
#include <linux/pci-acpi.h>
#include "pci.h"
#define DEVICE_LABEL_DSM 0x07
#ifdef CONFIG_DMI
enum smbios_attr_enum {
SMBIOS_ATTR_NONE = 0,
@ -148,11 +146,6 @@ static inline void pci_remove_smbiosname_file(struct pci_dev *pdev)
#endif
#ifdef CONFIG_ACPI
static const char device_label_dsm_uuid[] = {
0xD0, 0x37, 0xC9, 0xE5, 0x53, 0x35, 0x7A, 0x4D,
0x91, 0x17, 0xEA, 0x4D, 0x19, 0xC3, 0x43, 0x4D
};
enum acpi_attr_enum {
ACPI_ATTR_LABEL_SHOW,
ACPI_ATTR_INDEX_SHOW,
@ -179,7 +172,7 @@ static int dsm_get_label(struct device *dev, char *buf,
if (!handle)
return -1;
obj = acpi_evaluate_dsm(handle, device_label_dsm_uuid, 0x2,
obj = acpi_evaluate_dsm(handle, pci_acpi_dsm_uuid, 0x2,
DEVICE_LABEL_DSM, NULL);
if (!obj)
return -1;
@ -219,7 +212,7 @@ static bool device_has_dsm(struct device *dev)
if (!handle)
return false;
return !!acpi_check_dsm(handle, device_label_dsm_uuid, 0x2,
return !!acpi_check_dsm(handle, pci_acpi_dsm_uuid, 0x2,
1 << DEVICE_LABEL_DSM);
}

3
include/linux/pci-acpi.h
View File

@ -77,6 +77,9 @@ static inline void acpiphp_remove_slots(struct pci_bus *bus) { }
static inline void acpiphp_check_host_bridge(struct acpi_device *adev) { }
#endif
extern const u8 pci_acpi_dsm_uuid[];
#define DEVICE_LABEL_DSM 0x07
#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) { }