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Date: Fri, 12 Feb 2010 17:40:13 -0800
From: "Pan, Jacob jun" <jacob.jun.pan@...el.com>
To: "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
CC: Ingo Molnar <mingo@...e.hu>, Thomas Gleixner <tglx@...utronix.de>,
Arjan van de Ven <arjan@...ux.intel.com>,
"Barnes, Jesse" <jesse.barnes@...el.com>,
"Du, Alek" <alek.du@...el.com>, "Tang, Feng" <feng.tang@...el.com>,
"H. Peter Anvin" <hpa@...ux.intel.com>
Subject: PATCH 3/9] x86: Add pci_init_irq to x86_init
>From cfab24ca34cb4e9de284cea8a5688f4293b4ae76 Mon Sep 17 00:00:00 2001
From: Thomas Gleixner <tglx@...utronix.de>
Date: Sat, 29 Aug 2009 17:47:33 +0200
Subject: [PATCH 3/9] x86: Add pci_init_irq to x86_init
Moorestown wants to reuse pcibios_init_irq but needs to provide its
own implementation of pci_enable_irq. After we distangled the init we
can move the init_irq call to x86_init and remove the pci_enable_irq
!= NULL check in pcibios_init_irq. pci_enable_irq is compile time
initialized to pirq_enable_irq and the special cases which override it
(visws and acpi) set the x86_init function pointer to noop. That
allows MSRT to override pci_enable_irq and otherwise run
pcibios_init_irq unmodified.
Signed-off-by: Thomas Gleixner <tglx@...utronix.de>
Acked-by: Jesse Barnes <jbarnes@...tuousgeek.org>
Signed-off-by: Jacob Pan <jacob.jun.pan@...el.com>
---
arch/x86/include/asm/pci_x86.h | 4 +++-
arch/x86/include/asm/x86_init.h | 2 ++
arch/x86/kernel/visws_quirks.c | 1 +
arch/x86/kernel/x86_init.c | 1 +
arch/x86/pci/acpi.c | 1 +
arch/x86/pci/irq.c | 12 ++++--------
arch/x86/pci/legacy.c | 2 +-
7 files changed, 13 insertions(+), 10 deletions(-)
diff --git a/arch/x86/include/asm/pci_x86.h b/arch/x86/include/asm/pci_x86.h
index 440124f..46511c5 100644
--- a/arch/x86/include/asm/pci_x86.h
+++ b/arch/x86/include/asm/pci_x86.h
@@ -110,7 +110,7 @@ extern void __init dmi_check_skip_isa_align(void);
/* some common used subsys_initcalls */
extern int __init pci_acpi_init(void);
-extern int __init pcibios_irq_init(void);
+extern void __init pcibios_irq_init(void);
extern int __init pcibios_init(void);
extern int pci_legacy_init(void);
@@ -187,6 +187,8 @@ static inline void mmio_config_writel(void __iomem *pos, u32 val)
# else
# define x86_default_pci_init pci_legacy_init
# endif
+# define x86_default_pci_init_irq pcibios_irq_init
#else
# define x86_default_pci_init NULL
+# define x86_default_pci_init_irq NULL
#endif
diff --git a/arch/x86/include/asm/x86_init.h b/arch/x86/include/asm/x86_init.h
index f145d84..34f61cd 100644
--- a/arch/x86/include/asm/x86_init.h
+++ b/arch/x86/include/asm/x86_init.h
@@ -101,9 +101,11 @@ struct x86_init_iommu {
/*
* struct x86_init_pci - platform specific pci init functions
* @init: platform specific pci init
+ * @init_irq: platform specific pci irq init
*/
struct x86_init_pci {
int (*init)(void);
+ void (*init_irq)(void);
};
/**
diff --git a/arch/x86/kernel/visws_quirks.c b/arch/x86/kernel/visws_quirks.c
index 843e9d3..b48ef6c 100644
--- a/arch/x86/kernel/visws_quirks.c
+++ b/arch/x86/kernel/visws_quirks.c
@@ -238,6 +238,7 @@ void __init visws_early_detect(void)
x86_init.irqs.trap_init = visws_trap_init;
x86_init.timers.timer_init = visws_time_init;
x86_init.pci.init = pci_visws_init;
+ x86_init.pci.init_irq = x86_init_noop;
/*
* Install reboot quirks:
diff --git a/arch/x86/kernel/x86_init.c b/arch/x86/kernel/x86_init.c
index 81faa6d..203f26f 100644
--- a/arch/x86/kernel/x86_init.c
+++ b/arch/x86/kernel/x86_init.c
@@ -74,6 +74,7 @@ struct x86_init_ops x86_init __initdata = {
.pci = {
.init = x86_default_pci_init,
+ .init_irq = x86_default_pci_init_irq,
},
};
diff --git a/arch/x86/pci/acpi.c b/arch/x86/pci/acpi.c
index 73b3fe9..b53f048 100644
--- a/arch/x86/pci/acpi.c
+++ b/arch/x86/pci/acpi.c
@@ -289,6 +289,7 @@ int __init pci_acpi_init(void)
acpi_irq_penalty_init();
pcibios_enable_irq = acpi_pci_irq_enable;
pcibios_disable_irq = acpi_pci_irq_disable;
+ x86_init.pci.init_irq = x86_init_noop;
if (pci_routeirq) {
/*
diff --git a/arch/x86/pci/irq.c b/arch/x86/pci/irq.c
index 0696d50..0f40ff2 100644
--- a/arch/x86/pci/irq.c
+++ b/arch/x86/pci/irq.c
@@ -53,7 +53,7 @@ struct irq_router_handler {
int (*probe)(struct irq_router *r, struct pci_dev *router, u16 device);
};
-int (*pcibios_enable_irq)(struct pci_dev *dev) = NULL;
+int (*pcibios_enable_irq)(struct pci_dev *dev) = pirq_enable_irq;
void (*pcibios_disable_irq)(struct pci_dev *dev) = NULL;
/*
@@ -1110,12 +1110,12 @@ static struct dmi_system_id __initdata pciirq_dmi_table[] = {
{ }
};
-int __init pcibios_irq_init(void)
+void __init pcibios_irq_init(void)
{
DBG(KERN_DEBUG "PCI: IRQ init\n");
- if (pcibios_enable_irq || raw_pci_ops == NULL)
- return 0;
+ if (raw_pci_ops == NULL)
+ return;
dmi_check_system(pciirq_dmi_table);
@@ -1142,8 +1142,6 @@ int __init pcibios_irq_init(void)
pirq_table = NULL;
}
- pcibios_enable_irq = pirq_enable_irq;
-
pcibios_fixup_irqs();
if (io_apic_assign_pci_irqs && pci_routeirq) {
@@ -1157,8 +1155,6 @@ int __init pcibios_irq_init(void)
for_each_pci_dev(dev)
pirq_enable_irq(dev);
}
-
- return 0;
}
static void pirq_penalize_isa_irq(int irq, int active)
diff --git a/arch/x86/pci/legacy.c b/arch/x86/pci/legacy.c
index 0daf264..0db5eaf 100644
--- a/arch/x86/pci/legacy.c
+++ b/arch/x86/pci/legacy.c
@@ -60,7 +60,7 @@ int __init pci_subsys_init(void)
pci_legacy_init();
pcibios_fixup_peer_bridges();
- pcibios_irq_init();
+ x86_init.pci.init_irq();
pcibios_init();
return 0;
--
1.6.5.3
--
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