From mboxrd@z Thu Jan 1 00:00:00 1970 From: Gavin Shan Subject: [PATCH v9 01/22] PCI: Add pcibios_setup_bridge() Date: Tue, 3 May 2016 23:22:32 +1000 Message-ID: <1462281773-26438-2-git-send-email-gwshan@linux.vnet.ibm.com> References: <1462281773-26438-1-git-send-email-gwshan@linux.vnet.ibm.com> Return-path: In-Reply-To: <1462281773-26438-1-git-send-email-gwshan@linux.vnet.ibm.com> Sender: linux-pci-owner@vger.kernel.org To: linuxppc-dev@lists.ozlabs.org Cc: linux-pci@vger.kernel.org, devicetree@vger.kernel.org, benh@kernel.crashing.org, mpe@ellerman.id.au, aik@ozlabs.ru, bhelgaas@google.com, robherring2@gmail.com, dja@axtens.net, alistair@popple.id.au, Gavin Shan List-Id: devicetree@vger.kernel.org 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 Acked-by: Bjorn Helgaas --- 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