You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
81 lines
2.7 KiB
81 lines
2.7 KiB
11 years ago
|
From ea6a42a34462ea382209ff4f083b8b17260eb409 Mon Sep 17 00:00:00 2001
|
||
|
|
From: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
|
||
|
|
Date: Wed, 19 Jun 2013 18:27:20 +0200
|
||
|
|
Subject: [PATCH 076/203] 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>
|
||
|
|
---
|
||
|
|
arch/arm/include/asm/mach/pci.h | 4 ++++
|
||
|
|
arch/arm/kernel/bios32.c | 16 ++++++++++++++++
|
||
|
|
2 files changed, 20 insertions(+)
|
||
|
|
|
||
|
|
--- 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 */
|
||
|
|
};
|
||
|
|
|
||
|
|
--- a/arch/arm/kernel/bios32.c
|
||
|
|
+++ b/arch/arm/kernel/bios32.c
|
||
|
|
@@ -363,6 +363,20 @@ void pcibios_fixup_bus(struct pci_bus *b
|
||
|
|
}
|
||
|
|
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_pc
|
||
|
|
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)
|