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authorLinus Torvalds <torvalds@linux-foundation.org>2023-02-25 03:51:40 +0300
committerLinus Torvalds <torvalds@linux-foundation.org>2023-02-25 03:51:40 +0300
commit90ddb3f03418cce0d83c415c0c1d470cf524ba46 (patch)
treeb61a296898b66941cb77819230fa4df2d975a5b5 /drivers/acpi
parent8cbd92339db08b19b93d1637e5799ff2a8dddfd2 (diff)
parent3eb5d0f26f4ea604e83ca499a72c0d33638f4765 (diff)
downloadlinux-90ddb3f03418cce0d83c415c0c1d470cf524ba46.tar.xz
Merge tag 'pci-v6.3-changes' of git://git.kernel.org/pub/scm/linux/kernel/git/pci/pci
Pull PCI updates from Bjorn Helgaas: "Enumeration: - Rework portdrv shutdown so it disables interrupts but doesn't disable bus mastering, which leads to hangs on Loongson LS7A - Add mechanism to prevent Max_Read_Request_Size (MRRS) increases, again to avoid hardware issues on Loongson LS7A (and likely other devices based on DesignWare IP) - Ignore devices with a firmware (DT or ACPI) node that says the device is disabled Resource management: - Distribute spare resources to unconfigured hotplug bridges at boot-time (not just when hot-adding such a bridge), which makes hot-adding devices to docks work better. Tried this in v6.1 but had to revert for regressions, so try again - Fix root bus issue that dropped resources that happened to end at 0, e.g., [bus 00] PCI device hotplug: - Remove device locking when marking device as disconnected so this doesn't have to wait for concurrent driver bind/unbind to complete - Quirk more Qualcomm bridges that don't fully implement the PCIe Slot Status 'Command Completed' bit Power management: - Account for _S0W of the target bridge in acpi_pci_bridge_d3() so we don't miss hot-add notifications for USB4 docks, Thunderbolt, etc Reset: - Observe delay after reset, e.g., resuming from system sleep, regardless of whether a bridge can suspend to D3cold at runtime - Wait for secondary bus to become ready after a bridge reset Virtualization: - Avoid FLR on some AMD FCH AHCI adapters where it doesn't work - Allow independent IOMMU groups for some Wangxun NICs that prevent peer-to-peer transactions but don't advertise an ACS Capability Error handling: - Configure End-to-End-CRC (ECRC) only if Linux owns the AER Capability - Remove redundant Device Control Error Reporting Enable in the AER service driver since this is already done for all devices during enumeration ASPM: - Add pci_enable_link_state() interface to allow drivers to enable ASPM link state Endpoint framework: - Move dra7xx and tegra194 linkup processing from hard IRQ to threaded IRQ handler - Add a separate lock for endpoint controller list of endpoint function drivers to prevent deadlock in callbacks - Pass events from endpoint controller to endpoint function drivers via callbacks instead of notifiers Synopsys DesignWare eDMA controller driver (acked by Vinod): - Fix CPU vs PCI address issues - Fix source vs destination address issues - Fix issues with interleaved transfer semantics - Fix channel count initialization issue (issue still exists in several other drivers) - Clean up and improve debugfs usage so it will work on platforms with several eDMA devices Baikal T-1 PCIe controller driver: - Set a 64-bit DMA mask Freescale i.MX6 PCIe controller driver: - Add i.MX8MM, i.MX8MQ, i.MX8MP endpoint mode DT binding and driver support Intel VMD host bridge driver: - Add quirk to configure PCIe ASPM and LTR. This is normally done by BIOS, and will be for future products Marvell MVEBU PCIe controller driver: - Mark this driver as broken in Kconfig since bugs prevent its daily usage MediaTek MT7621 PCIe controller driver: - Delay PHY port initialization to improve boot reliability for ZBT WE1326, ZBT WF3526-P, and some Netgear models Qualcomm PCIe controller driver: - Add MSM8998 DT compatible string - Unify MSM8996 and MSM8998 clock orderings - Add SM8350 DT binding and driver support - Add IPQ8074 Gen3 DT binding and driver support - Correct qcom,perst-regs in DT binding - Add qcom_pcie_host_deinit() so the PHY is powered off and regulators and clocks are disabled on late host-init errors Socionext UniPhier Pro5 controller driver: - Clean up uniphier-ep reg, clocks, resets, and their names in DT binding Synopsys DesignWare PCIe controller driver: - Restrict coherent DMA mask to 32 bits for MSI, but allow controller drivers to set 64-bit streaming DMA mask - Add eDMA engine support in both Root Port and Endpoint controllers Miscellaneous: - Remove MODULE_LICENSE from boolean drivers so they don't look like modules so modprobe can complain about them" * tag 'pci-v6.3-changes' of git://git.kernel.org/pub/scm/linux/kernel/git/pci/pci: (86 commits) PCI: dwc: Add Root Port and Endpoint controller eDMA engine support PCI: bt1: Set 64-bit DMA mask PCI: dwc: Restrict only coherent DMA mask for MSI address allocation dmaengine: dw-edma: Prepare dw_edma_probe() for builtin callers dmaengine: dw-edma: Depend on DW_EDMA instead of selecting it dmaengine: dw-edma: Add mem-mapped LL-entries support PCI: Remove MODULE_LICENSE so boolean drivers don't look like modules PCI: hv: Drop duplicate PCI_MSI dependency PCI/P2PDMA: Annotate RCU dereference PCI/sysfs: Constify struct kobj_type pci_slot_ktype PCI: hotplug: Allow marking devices as disconnected during bind/unbind PCI: pciehp: Add Qualcomm quirk for Command Completed erratum PCI: qcom: Add IPQ8074 Gen3 port support dt-bindings: PCI: qcom: Add IPQ8074 Gen3 port dt-bindings: PCI: qcom: Sort compatibles alphabetically PCI: qcom: Fix host-init error handling PCI: qcom: Add SM8350 support dt-bindings: PCI: qcom: Add SM8350 dt-bindings: PCI: qcom-ep: Correct qcom,perst-regs dt-bindings: PCI: qcom: Unify MSM8996 and MSM8998 clock order ...
Diffstat (limited to 'drivers/acpi')
-rw-r--r--drivers/acpi/device_pm.c19
1 files changed, 19 insertions, 0 deletions
diff --git a/drivers/acpi/device_pm.c b/drivers/acpi/device_pm.c
index 97450f4003cc..f007116a8427 100644
--- a/drivers/acpi/device_pm.c
+++ b/drivers/acpi/device_pm.c
@@ -484,6 +484,25 @@ void acpi_dev_power_up_children_with_adr(struct acpi_device *adev)
acpi_dev_for_each_child(adev, acpi_power_up_if_adr_present, NULL);
}
+/**
+ * acpi_dev_power_state_for_wake - Deepest power state for wakeup signaling
+ * @adev: ACPI companion of the target device.
+ *
+ * Evaluate _S0W for @adev and return the value produced by it or return
+ * ACPI_STATE_UNKNOWN on errors (including _S0W not present).
+ */
+u8 acpi_dev_power_state_for_wake(struct acpi_device *adev)
+{
+ unsigned long long state;
+ acpi_status status;
+
+ status = acpi_evaluate_integer(adev->handle, "_S0W", NULL, &state);
+ if (ACPI_FAILURE(status))
+ return ACPI_STATE_UNKNOWN;
+
+ return state;
+}
+
#ifdef CONFIG_PM
static DEFINE_MUTEX(acpi_pm_notifier_lock);
static DEFINE_MUTEX(acpi_pm_notifier_install_lock);