[PATCH v9 01/22] PCI: Add pcibios_setup_bridge()
From: Gavin Shan <hidden>
Date: 2016-05-03 13:22:32
Also in:
linux-devicetree, linux-pci
Subsystem:
pci subsystem, the rest · Maintainers:
Bjorn Helgaas, Linus Torvalds
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 <redacted> Acked-by: Bjorn Helgaas <bhelgaas@google.com> --- drivers/pci/setup-bus.c | 5 +++++ include/linux/pci.h | 1 + 2 files changed, 6 insertions(+)
diff --git a/drivers/pci/setup-bus.c b/drivers/pci/setup-bus.c
index 55641a3..d678c46 100644
--- a/drivers/pci/setup-bus.c
+++ b/drivers/pci/setup-bus.c@@ -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); }
diff --git a/include/linux/pci.h b/include/linux/pci.h
index 004b813..a17f0e8 100644
--- a/include/linux/pci.h
+++ b/include/linux/pci.h@@ -856,6 +856,7 @@ 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))
--
2.1.0