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Commit d366d28c authored by Gavin Shan's avatar Gavin Shan Committed by Michael Ellerman
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PCI: Add pcibios_setup_bridge() 



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: default avatarGavin Shan <gwshan@linux.vnet.ibm.com>
Acked-by: default avatarBjorn Helgaas <bhelgaas@google.com>
Signed-off-by: default avatarMichael Ellerman <mpe@ellerman.id.au>
parent f8ab4810

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))