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Message-Id: <1415470418-10874-29-git-send-email-jiang.liu@linux.intel.com>
Date: Sun, 9 Nov 2014 02:13:28 +0800
From: Jiang Liu <jiang.liu@...ux.intel.com>
To: Benjamin Herrenschmidt <benh@...nel.crashing.org>,
Thomas Gleixner <tglx@...utronix.de>,
Ingo Molnar <mingo@...hat.com>,
"H. Peter Anvin" <hpa@...or.com>,
"Rafael J. Wysocki" <rjw@...ysocki.net>,
Bjorn Helgaas <bhelgaas@...gle.com>,
Randy Dunlap <rdunlap@...radead.org>,
Yinghai Lu <yinghai@...nel.org>,
Borislav Petkov <bp@...en8.de>, x86@...nel.org,
Jiang Liu <jiang.liu@...ux.intel.com>,
Grant Likely <grant.likely@...aro.org>
Cc: Konrad Rzeszutek Wilk <konrad.wilk@...cle.com>,
Andrew Morton <akpm@...ux-foundation.org>,
Tony Luck <tony.luck@...el.com>,
Joerg Roedel <joro@...tes.org>,
Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
linux-kernel@...r.kernel.org, linux-pci@...r.kernel.org,
linux-acpi@...r.kernel.org
Subject: [Patch Part3 v3 28/38] x86, irq: Clean up io_apic.h
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@...ux.intel.com>
---
arch/x86/include/asm/io_apic.h | 14 ++------------
arch/x86/kernel/apic/io_apic.c | 23 ++++++++---------------
2 files changed, 10 insertions(+), 27 deletions(-)
diff --git a/arch/x86/include/asm/io_apic.h b/arch/x86/include/asm/io_apic.h
index 21578af00243..b569ae098eb1 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))
@@ -146,7 +145,6 @@ extern unsigned long io_apic_irqs;
#define io_apic_assign_pci_irqs \
(mp_irq_entries && !skip_ioapic_setup && io_apic_irqs)
-struct irq_cfg;
extern void ioapic_insert_resources(void);
extern int arch_early_ioapic_init(void);
@@ -174,15 +172,8 @@ 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 +222,6 @@ 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 7a3679e43b67..a915ee005148 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)
@@ -94,6 +93,11 @@ struct mp_chip_data {
bool isa_irq;
};
+struct mp_ioapic_gsi {
+ u32 gsi_base;
+ u32 gsi_end;
+};
+
static struct ioapic {
/*
* # of IRQ routing registers
@@ -124,7 +128,7 @@ 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;
}
@@ -136,7 +140,7 @@ 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;
}
@@ -1146,8 +1150,7 @@ 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;
@@ -1709,7 +1712,6 @@ 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;
@@ -1727,15 +1729,6 @@ 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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