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x86, hpet: Introduce x86_msi_ops.setup_hpet_msi 

This function pointer can be overwritten by the IRQ
remapping code. The irq_remapping_enabled check can be
removed from default_setup_hpet_msi.

Signed-off-by: Joerg Roedel <joro@8bytes.org>
Acked-by: Sebastian Andrzej Siewior <sebastian@breakpoint.cc>
Reviewed-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
hifive-unleashed-5.1
Joerg Roedel 2012-09-26 12:44:37 +02:00
parent afcc8a40a0
commit 71054d8841
6 changed files with 14 additions and 15 deletions
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5
arch/x86/include/asm/hpet.h
View File

@ -80,9 +80,9 @@ extern void hpet_msi_write(struct hpet_dev *hdev, struct msi_msg *msg);
extern void hpet_msi_read(struct hpet_dev *hdev, struct msi_msg *msg);
#ifdef CONFIG_PCI_MSI
extern int arch_setup_hpet_msi(unsigned int irq, unsigned int id);
extern int default_setup_hpet_msi(unsigned int irq, unsigned int id);
#else
static inline int arch_setup_hpet_msi(unsigned int irq, unsigned int id)
static inline int default_setup_hpet_msi(unsigned int irq, unsigned int id)
{
return -EINVAL;
}
@ -111,6 +111,7 @@ extern void hpet_unregister_irq_handler(rtc_irq_handler handler);
static inline int hpet_enable(void) { return 0; }
static inline int is_hpet_enabled(void) { return 0; }
#define hpet_readl(a) 0
#define default_setup_hpet_msi NULL
#endif
#endif /* _ASM_X86_HPET_H */

1
arch/x86/include/asm/x86_init.h
View File

@ -187,6 +187,7 @@ struct x86_msi_ops {
void (*teardown_msi_irq)(unsigned int irq);
void (*teardown_msi_irqs)(struct pci_dev *dev);
void (*restore_msi_irqs)(struct pci_dev *dev, int irq);
int (*setup_hpet_msi)(unsigned int irq, unsigned int id);
};
struct x86_io_apic_ops {

8
arch/x86/kernel/apic/io_apic.c
View File

@ -3399,18 +3399,12 @@ static struct irq_chip hpet_msi_type = {
.irq_retrigger = ioapic_retrigger_irq,
};
int arch_setup_hpet_msi(unsigned int irq, unsigned int id)
int default_setup_hpet_msi(unsigned int irq, unsigned int id)
{
struct irq_chip *chip = &hpet_msi_type;
struct msi_msg msg;
int ret;
if (irq_remapping_enabled) {
ret = setup_hpet_msi_remapped(irq, id);
if (ret)
return ret;
}
ret = msi_compose_msg(NULL, irq, &msg, id);
if (ret < 0)
return ret;

2
arch/x86/kernel/hpet.c
View File

@ -478,7 +478,7 @@ static int hpet_msi_next_event(unsigned long delta,
static int hpet_setup_msi_irq(unsigned int irq)
{
if (arch_setup_hpet_msi(irq, hpet_blockid)) {
if (x86_msi.setup_hpet_msi(irq, hpet_blockid)) {
destroy_irq(irq);
return -EINVAL;
}

10
arch/x86/kernel/x86_init.c
View File

@ -19,6 +19,7 @@
#include <asm/time.h>
#include <asm/irq.h>
#include <asm/io_apic.h>
#include <asm/hpet.h>
#include <asm/pat.h>
#include <asm/tsc.h>
#include <asm/iommu.h>
@ -111,10 +112,11 @@ struct x86_platform_ops x86_platform = {
EXPORT_SYMBOL_GPL(x86_platform);
struct x86_msi_ops x86_msi = {
.setup_msi_irqs = native_setup_msi_irqs,
.teardown_msi_irq = native_teardown_msi_irq,
.teardown_msi_irqs = default_teardown_msi_irqs,
.restore_msi_irqs = default_restore_msi_irqs,
.setup_msi_irqs = native_setup_msi_irqs,
.teardown_msi_irq = native_teardown_msi_irq,
.teardown_msi_irqs = default_teardown_msi_irqs,
.restore_msi_irqs = default_restore_msi_irqs,
.setup_hpet_msi = default_setup_hpet_msi,
};
struct x86_io_apic_ops x86_io_apic_ops = {

3
drivers/iommu/irq_remapping.c
View File

@ -36,7 +36,8 @@ static void irq_remapping_disable_io_apic(void)
static void __init irq_remapping_modify_x86_ops(void)
{
x86_io_apic_ops.disable = irq_remapping_disable_io_apic;
x86_io_apic_ops.disable = irq_remapping_disable_io_apic;
x86_msi.setup_hpet_msi = setup_hpet_msi_remapped;
}
static __init int setup_nointremap(char *str)