diff options
author | Thomas Petazzoni <thomas.petazzoni@free-electrons.com> | 2013-08-09 22:27:12 +0200 |
---|---|---|
committer | Richard Zhu <r65037@freescale.com> | 2013-11-20 14:10:33 +0800 |
commit | e4f807523d8f3a5af230a7773c2a647165247829 (patch) | |
tree | 7068c6ae191c152df6e929cceddf32494bcc3db6 /arch/arm | |
parent | 375cbfdab099bc7548db50ab7e694e54e642d34b (diff) |
ARM: pci: add ->add_bus() and ->remove_bus() hooks to hw_pci
Some PCI drivers may need to adjust the pci_bus structure after it has
been allocated by the Linux PCI core. The PCI core allows
architectures to implement the pcibios_add_bus() and
pcibios_remove_bus() for this purpose. This commit therefore extends
the hw_pci and pci_sys_data structures of the ARM PCI core to allow
PCI drivers to register ->add_bus() and ->remove_bus() in hw_pci,
which will get called when a bus is added or removed from the system.
This will be used for example by the Marvell PCIe driver to connect a
particular PCI bus with its corresponding MSI chip to handle Message
Signaled Interrupts.
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
Reviewed-by: Thierry Reding <thierry.reding@gmail.com>
Acked-by: Russell King <rmk+kernel@arm.linux.org.uk>
Tested-by: Daniel Price <daniel.price@gmail.com>
Tested-by: Thierry Reding <thierry.reding@gmail.com>
Signed-off-by: Jason Cooper <jason@lakedaemon.net>
Diffstat (limited to 'arch/arm')
-rw-r--r-- | arch/arm/include/asm/mach/pci.h | 4 | ||||
-rw-r--r-- | arch/arm/kernel/bios32.c | 16 |
2 files changed, 20 insertions, 0 deletions
diff --git a/arch/arm/include/asm/mach/pci.h b/arch/arm/include/asm/mach/pci.h index ef5053527ba7..f03f677347b1 100644 --- a/arch/arm/include/asm/mach/pci.h +++ b/arch/arm/include/asm/mach/pci.h @@ -35,6 +35,8 @@ struct hw_pci { resource_size_t start, resource_size_t size, resource_size_t align); + void (*add_bus)(struct pci_bus *bus); + void (*remove_bus)(struct pci_bus *bus); }; /* @@ -62,6 +64,8 @@ struct pci_sys_data { resource_size_t start, resource_size_t size, resource_size_t align); + void (*add_bus)(struct pci_bus *bus); + void (*remove_bus)(struct pci_bus *bus); void *private_data; /* platform controller private data */ }; diff --git a/arch/arm/kernel/bios32.c b/arch/arm/kernel/bios32.c index b2ed73c45489..b0024b209319 100644 --- a/arch/arm/kernel/bios32.c +++ b/arch/arm/kernel/bios32.c @@ -363,6 +363,20 @@ void pcibios_fixup_bus(struct pci_bus *bus) } EXPORT_SYMBOL(pcibios_fixup_bus); +void pcibios_add_bus(struct pci_bus *bus) +{ + struct pci_sys_data *sys = bus->sysdata; + if (sys->add_bus) + sys->add_bus(bus); +} + +void pcibios_remove_bus(struct pci_bus *bus) +{ + struct pci_sys_data *sys = bus->sysdata; + if (sys->remove_bus) + sys->remove_bus(bus); +} + /* * Swizzle the device pin each time we cross a bridge. If a platform does * not provide a swizzle function, we perform the standard PCI swizzling. @@ -463,6 +477,8 @@ static void pcibios_init_hw(struct hw_pci *hw, struct list_head *head) sys->swizzle = hw->swizzle; sys->map_irq = hw->map_irq; sys->align_resource = hw->align_resource; + sys->add_bus = hw->add_bus; + sys->remove_bus = hw->remove_bus; INIT_LIST_HEAD(&sys->resources); if (hw->private_data) |