PCI: Enable ATS at the device state restore (1900ca13) · Commits · 戴 / test

drivers/pci/ats.c

+17 −0

Original line number	Diff line number	Diff line
		@@ -128,6 +128,23 @@ void pci_disable_ats(struct pci_dev *dev)
		}
		EXPORT_SYMBOL_GPL(pci_disable_ats);

		void pci_restore_ats_state(struct pci_dev *dev)
		{
		u16 ctrl;

		if (!pci_ats_enabled(dev))
		return;
		if (!pci_find_ext_capability(dev, PCI_EXT_CAP_ID_ATS))
		BUG();

		ctrl = PCI_ATS_CTRL_ENABLE;
		if (!dev->is_virtfn)
		ctrl \|= PCI_ATS_CTRL_STU(dev->ats->stu - PCI_ATS_MIN_STU);

		pci_write_config_word(dev, dev->ats->pos + PCI_ATS_CTRL, ctrl);
		}
		EXPORT_SYMBOL_GPL(pci_restore_ats_state);

		/**
		* pci_ats_queue_depth - query the ATS Invalidate Queue Depth
		* @dev: the PCI device

+1 −0

Original line number	Diff line number	Diff line
		@@ -965,6 +965,7 @@ void pci_restore_state(struct pci_dev *dev)

		/* PCI Express register must be restored first */
		pci_restore_pcie_state(dev);
		pci_restore_ats_state(dev);

		/*
		* The Base Address register should be programmed before the command

+8 −0

Original line number	Diff line number	Diff line
		@@ -251,6 +251,14 @@ struct pci_sriov {
		u8 __iomem mstate; / VF Migration State Array */
		};

		#ifdef CONFIG_PCI_ATS
		extern void pci_restore_ats_state(struct pci_dev *dev);
		#else
		static inline void pci_restore_ats_state(struct pci_dev *dev)
		{
		}
		#endif /* CONFIG_PCI_ATS */

		#ifdef CONFIG_PCI_IOV
		extern int pci_iov_init(struct pci_dev *dev);
		extern void pci_iov_release(struct pci_dev *dev);