PCI: Add pcibios_setup_bridge() (d366d28c) · Commits · 戴 / test

Currently, PowerPC PowerNV platform utilizes ppc_md.pcibios_fixup(), which is called for once after PCI probing and resource assignment are completed, to allocate platform required resources for PCI devices: PE#, IO and MMIO mapping, DMA address translation (TCE) table etc. Obviously, it's not hotplug friendly. This adds weak function pcibios_setup_bridge(), which is called by pci_setup_bridge(). PowerPC PowerNV platform will reuse the function to assign above platform required resources to newly plugged PCI devices during PCI hotplug in subsequent patches. Signed-off-by:

Gavin Shan <gwshan@linux.vnet.ibm.com> Acked-by:

Bjorn Helgaas <bhelgaas@google.com> Signed-off-by:

Michael Ellerman <mpe@ellerman.id.au>

drivers/pci/setup-bus.c

+5 −0

Original line number	Diff line number	Diff line
		@@ -695,11 +695,16 @@ static void __pci_setup_bridge(struct pci_bus *bus, unsigned long type)
		pci_write_config_word(bridge, PCI_BRIDGE_CONTROL, bus->bridge_ctl);
		}

		void __weak pcibios_setup_bridge(struct pci_bus *bus, unsigned long type)
		{
		}

		void pci_setup_bridge(struct pci_bus *bus)
		{
		unsigned long type = IORESOURCE_IO \| IORESOURCE_MEM \|
		IORESOURCE_PREFETCH;

		pcibios_setup_bridge(bus, type);
		__pci_setup_bridge(bus, type);
		}

include/linux/pci.h

+1 −0

Original line number	Diff line number	Diff line
		@@ -854,6 +854,7 @@ void pci_stop_and_remove_bus_device_locked(struct pci_dev *dev);
		void pci_stop_root_bus(struct pci_bus *bus);
		void pci_remove_root_bus(struct pci_bus *bus);
		void pci_setup_cardbus(struct pci_bus *bus);
		void pcibios_setup_bridge(struct pci_bus *bus, unsigned long type);
		void pci_sort_breadthfirst(void);
		#define dev_is_pci(d) ((d)->bus == &pci_bus_type)
		#define dev_is_pf(d) ((dev_is_pci(d) ? to_pci_dev(d)->is_physfn : false))

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