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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>
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@ -18,6 +18,15 @@
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#include <linux/pm_qos.h>
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#include "pci.h"
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/*
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* The UUID is defined in the PCI Firmware Specification available here:
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* https://www.pcisig.com/members/downloads/pcifw_r3_1_13Dec10.pdf
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*/
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const u8 pci_acpi_dsm_uuid[] = {
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0xd0, 0x37, 0xc9, 0xe5, 0x53, 0x35, 0x7a, 0x4d,
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0x91, 0x17, 0xea, 0x4d, 0x19, 0xc3, 0x43, 0x4d
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};
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phys_addr_t acpi_pci_root_get_mcfg_addr(acpi_handle handle)
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{
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acpi_status status = AE_NOT_EXIST;
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@ -31,8 +31,6 @@
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#include <linux/pci-acpi.h>
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#include "pci.h"
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#define DEVICE_LABEL_DSM 0x07
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#ifdef CONFIG_DMI
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enum smbios_attr_enum {
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SMBIOS_ATTR_NONE = 0,
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@ -148,11 +146,6 @@ static inline void pci_remove_smbiosname_file(struct pci_dev *pdev)
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#endif
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#ifdef CONFIG_ACPI
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static const char device_label_dsm_uuid[] = {
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0xD0, 0x37, 0xC9, 0xE5, 0x53, 0x35, 0x7A, 0x4D,
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0x91, 0x17, 0xEA, 0x4D, 0x19, 0xC3, 0x43, 0x4D
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};
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enum acpi_attr_enum {
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ACPI_ATTR_LABEL_SHOW,
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ACPI_ATTR_INDEX_SHOW,
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@ -179,7 +172,7 @@ static int dsm_get_label(struct device *dev, char *buf,
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if (!handle)
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return -1;
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obj = acpi_evaluate_dsm(handle, device_label_dsm_uuid, 0x2,
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obj = acpi_evaluate_dsm(handle, pci_acpi_dsm_uuid, 0x2,
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DEVICE_LABEL_DSM, NULL);
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if (!obj)
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return -1;
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@ -219,7 +212,7 @@ static bool device_has_dsm(struct device *dev)
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if (!handle)
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return false;
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return !!acpi_check_dsm(handle, device_label_dsm_uuid, 0x2,
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return !!acpi_check_dsm(handle, pci_acpi_dsm_uuid, 0x2,
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1 << DEVICE_LABEL_DSM);
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}
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@ -77,6 +77,9 @@ static inline void acpiphp_remove_slots(struct pci_bus *bus) { }
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static inline void acpiphp_check_host_bridge(struct acpi_device *adev) { }
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#endif
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extern const u8 pci_acpi_dsm_uuid[];
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#define DEVICE_LABEL_DSM 0x07
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#else /* CONFIG_ACPI */
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static inline void acpi_pci_add_bus(struct pci_bus *bus) { }
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static inline void acpi_pci_remove_bus(struct pci_bus *bus) { }
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