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Subject[Patch Part2 v5 19/33] x86/irq: Clean up io_apic.h
Date
Clean up io_apic.h by:
1) moving definition of struct mp_ioapic_gsi into io_apic.c
2) changing mp_pin_to_gsi() and mp_ioapic_gsi_routing() as static
3) killing unused MP_MAX_IOAPIC_PIN
4) killing useless forward declaration
5) killing useless comments

Signed-off-by: Jiang Liu <jiang.liu@linux.intel.com>
Cc: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
Cc: Tony Luck <tony.luck@intel.com>
Cc: Joerg Roedel <joro@8bytes.org>
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Cc: Bjorn Helgaas <bhelgaas@google.com>
Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Cc: Rafael J. Wysocki <rjw@rjwysocki.net>
Cc: Randy Dunlap <rdunlap@infradead.org>
Cc: Yinghai Lu <yinghai@kernel.org>
Cc: Borislav Petkov <bp@alien8.de>
Cc: Grant Likely <grant.likely@linaro.org>
Link: http://lkml.kernel.org/r/1416901802-24211-29-git-send-email-jiang.liu@linux.intel.com
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Tested-by: Joerg Roedel <jroedel@suse.de>
---
arch/x86/include/asm/io_apic.h | 13 ++-----------
arch/x86/kernel/apic/io_apic.c | 23 ++++++++---------------
2 files changed, 10 insertions(+), 26 deletions(-)

diff --git a/arch/x86/include/asm/io_apic.h b/arch/x86/include/asm/io_apic.h
index c6486dd44418..67bdb72caeaf 100644
--- a/arch/x86/include/asm/io_apic.h
+++ b/arch/x86/include/asm/io_apic.h
@@ -113,9 +113,6 @@ extern int nr_ioapics;

extern int mpc_ioapic_id(int ioapic);
extern unsigned int mpc_ioapic_addr(int ioapic);
-extern struct mp_ioapic_gsi *mp_ioapic_gsi_routing(int ioapic);
-
-#define MP_MAX_IOAPIC_PIN 127

/* # of MP IRQ source entries */
extern int mp_irq_entries;
@@ -135,6 +132,8 @@ extern int noioapicquirk;
/* -1 if "noapic" boot option passed */
extern int noioapicreroute;

+extern u32 gsi_top;
+
extern unsigned long io_apic_irqs;

#define IO_APIC_IRQ(x) (((x) >= NR_IRQS_LEGACY) || ((1 << (x)) & io_apic_irqs))
@@ -174,15 +173,8 @@ struct ioapic_domain_cfg {
struct device_node *dev;
};

-struct mp_ioapic_gsi{
- u32 gsi_base;
- u32 gsi_end;
-};
-extern u32 gsi_top;
-
extern int mp_find_ioapic(u32 gsi);
extern int mp_find_ioapic_pin(int ioapic, u32 gsi);
-extern u32 mp_pin_to_gsi(int ioapic, int pin);
extern int mp_map_gsi_to_irq(u32 gsi, unsigned int flags,
struct irq_alloc_info *info);
extern void mp_unmap_irq(int irq);
@@ -231,7 +223,6 @@ static inline int arch_early_ioapic_init(void) { return 0; }
static inline void print_IO_APICs(void) {}
#define gsi_top (NR_IRQS_LEGACY)
static inline int mp_find_ioapic(u32 gsi) { return 0; }
-static inline u32 mp_pin_to_gsi(int ioapic, int pin) { return UINT_MAX; }
static inline int mp_map_gsi_to_irq(u32 gsi, unsigned int flags,
struct irq_alloc_info *info)
{
diff --git a/arch/x86/kernel/apic/io_apic.c b/arch/x86/kernel/apic/io_apic.c
index d687a10ed3a2..32a8d51975b3 100644
--- a/arch/x86/kernel/apic/io_apic.c
+++ b/arch/x86/kernel/apic/io_apic.c
@@ -63,7 +63,6 @@
#define for_each_ioapic_pin(idx, pin) \
for_each_ioapic((idx)) \
for_each_pin((idx), (pin))
-
#define for_each_irq_pin(entry, head) \
list_for_each_entry(entry, &head, list)

@@ -92,6 +91,11 @@ struct mp_chip_data {
bool isa_irq;
};

+struct mp_ioapic_gsi {
+ u32 gsi_base;
+ u32 gsi_end;
+};
+
static struct ioapic {
/*
* # of IRQ routing registers
@@ -122,7 +126,7 @@ unsigned int mpc_ioapic_addr(int ioapic_idx)
return ioapics[ioapic_idx].mp_config.apicaddr;
}

-struct mp_ioapic_gsi *mp_ioapic_gsi_routing(int ioapic_idx)
+static inline struct mp_ioapic_gsi *mp_ioapic_gsi_routing(int ioapic_idx)
{
return &ioapics[ioapic_idx].gsi_config;
}
@@ -134,7 +138,7 @@ static inline int mp_ioapic_pin_count(int ioapic)
return gsi_cfg->gsi_end - gsi_cfg->gsi_base + 1;
}

-u32 mp_pin_to_gsi(int ioapic, int pin)
+static inline u32 mp_pin_to_gsi(int ioapic, int pin)
{
return mp_ioapic_gsi_routing(ioapic)->gsi_base + pin;
}
@@ -1153,8 +1157,7 @@ static int pin_2_irq(int idx, int ioapic, int pin, unsigned int flags)
return mp_map_pin_to_irq(gsi, idx, ioapic, pin, flags, NULL);
}

-int mp_map_gsi_to_irq(u32 gsi, unsigned int flags,
- struct irq_alloc_info *info)
+int mp_map_gsi_to_irq(u32 gsi, unsigned int flags, struct irq_alloc_info *info)
{
int ioapic, pin, idx;

@@ -1719,7 +1722,6 @@ static int __init timer_irq_works(void)
* This is not complete - we should be able to fake
* an edge even if it isn't on the 8259A...
*/
-
static unsigned int startup_ioapic_irq(struct irq_data *data)
{
int was_pending = 0, irq = data->irq;
@@ -1737,15 +1739,6 @@ static unsigned int startup_ioapic_irq(struct irq_data *data)
return was_pending;
}

-/*
- * Level and edge triggered IO-APIC interrupts need different handling,
- * so we use two separate IRQ descriptors. Edge triggered IRQs can be
- * handled with the level-triggered descriptor, but that one has slightly
- * more overhead. Level-triggered interrupts cannot be handled with the
- * edge-triggered handler, without risking IRQ storms and other ugly
- * races.
- */
-
static void __target_IO_APIC_irq(unsigned int irq, struct irq_cfg *cfg,
struct mp_chip_data *data)
{
--
1.7.10.4


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