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81 lines
2.7 KiB
Diff
81 lines
2.7 KiB
Diff
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From ea6a42a34462ea382209ff4f083b8b17260eb409 Mon Sep 17 00:00:00 2001
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From: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
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Date: Wed, 19 Jun 2013 18:27:20 +0200
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Subject: [PATCH 076/203] ARM: pci: add ->add_bus() and ->remove_bus() hooks to
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hw_pci
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Some PCI drivers may need to adjust the pci_bus structure after it has
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been allocated by the Linux PCI core. The PCI core allows
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architectures to implement the pcibios_add_bus() and
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pcibios_remove_bus() for this purpose. This commit therefore extends
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the hw_pci and pci_sys_data structures of the ARM PCI core to allow
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PCI drivers to register ->add_bus() and ->remove_bus() in hw_pci,
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which will get called when a bus is added or removed from the system.
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This will be used for example by the Marvell PCIe driver to connect a
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particular PCI bus with its corresponding MSI chip to handle Message
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Signaled Interrupts.
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Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
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Reviewed-by: Thierry Reding <thierry.reding@gmail.com>
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Acked-by: Russell King <rmk+kernel@arm.linux.org.uk>
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Tested-by: Daniel Price <daniel.price@gmail.com>
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Tested-by: Thierry Reding <thierry.reding@gmail.com>
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---
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arch/arm/include/asm/mach/pci.h | 4 ++++
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arch/arm/kernel/bios32.c | 16 ++++++++++++++++
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2 files changed, 20 insertions(+)
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--- a/arch/arm/include/asm/mach/pci.h
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+++ b/arch/arm/include/asm/mach/pci.h
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@@ -35,6 +35,8 @@ struct hw_pci {
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resource_size_t start,
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resource_size_t size,
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resource_size_t align);
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+ void (*add_bus)(struct pci_bus *bus);
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+ void (*remove_bus)(struct pci_bus *bus);
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};
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/*
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@@ -62,6 +64,8 @@ struct pci_sys_data {
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resource_size_t start,
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resource_size_t size,
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resource_size_t align);
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+ void (*add_bus)(struct pci_bus *bus);
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+ void (*remove_bus)(struct pci_bus *bus);
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void *private_data; /* platform controller private data */
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};
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--- a/arch/arm/kernel/bios32.c
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+++ b/arch/arm/kernel/bios32.c
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@@ -363,6 +363,20 @@ void pcibios_fixup_bus(struct pci_bus *b
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}
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EXPORT_SYMBOL(pcibios_fixup_bus);
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+void pcibios_add_bus(struct pci_bus *bus)
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+{
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+ struct pci_sys_data *sys = bus->sysdata;
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+ if (sys->add_bus)
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+ sys->add_bus(bus);
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+}
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+
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+void pcibios_remove_bus(struct pci_bus *bus)
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+{
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+ struct pci_sys_data *sys = bus->sysdata;
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+ if (sys->remove_bus)
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+ sys->remove_bus(bus);
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+}
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+
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/*
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* Swizzle the device pin each time we cross a bridge. If a platform does
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* not provide a swizzle function, we perform the standard PCI swizzling.
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@@ -463,6 +477,8 @@ static void pcibios_init_hw(struct hw_pc
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sys->swizzle = hw->swizzle;
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sys->map_irq = hw->map_irq;
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sys->align_resource = hw->align_resource;
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+ sys->add_bus = hw->add_bus;
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+ sys->remove_bus = hw->remove_bus;
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INIT_LIST_HEAD(&sys->resources);
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if (hw->private_data)
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