[PATCH 2/3] x86: unify current 3 similar ways of saving IRQ info

Feng Tang
2010-05-21T02:04:18Z

>From 9ba7685bfdcaa2a5c40eade388902c478bc46071 Mon Sep 17 00:00:00 2001
From: Feng Tang <feng.tang@intel.com>
Date: Thu, 20 May 2010 17:40:05 +0800
Subject: [PATCH 2/3] x86: unify current 3 similar ways of saving IRQ info

There are 3 places defining the similar function of saving IRQ
vector info into mp_irqs[] array: mmparse/acpi/sfi. This patch
will reduce the redundant code, and make it only one API:
void mp_save_irq(struct mpc_intsrc *m);

Cc: Len Brown <len.brown@intel.com>
Cc: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Feng Tang <feng.tang@intel.com>
---
arch/x86/include/asm/mpspec.h | 6 ++++++
arch/x86/kernel/acpi/boot.c | 32 +++-----------------------------
arch/x86/kernel/mpparse.c | 14 +++++++-------
arch/x86/kernel/mrst.c | 30 ++----------------------------
4 files changed, 18 insertions(+), 64 deletions(-)

diff --git a/arch/x86/include/asm/mpspec.h b/arch/x86/include/asm/mpspec.h
index c82868e..17f4314 100644
--- a/arch/x86/include/asm/mpspec.h
+++ b/arch/x86/include/asm/mpspec.h
@@ -42,6 +42,12 @@ extern int quad_local_to_mp_bus_id [NR_CPUS/4][4];

#endif /* CONFIG_X86_64 */

+#ifdef CONFIG_X86_IO_APIC
+void mp_save_irq(struct mpc_intsrc *m);
+#else
+static inline void mp_save_irq(struct mpc_intsrc *m) {}
+#endif
+
#if defined(CONFIG_MCA) || defined(CONFIG_EISA)
extern int mp_bus_id_to_type[MAX_MP_BUSSES];
#endif
diff --git a/arch/x86/kernel/acpi/boot.c b/arch/x86/kernel/acpi/boot.c
index 9a5ed58..8f32fe2 100644
--- a/arch/x86/kernel/acpi/boot.c
+++ b/arch/x86/kernel/acpi/boot.c
@@ -923,32 +923,6 @@ static int __init acpi_parse_madt_lapic_entries(void)
extern int es7000_plat;
#endif

-static void assign_to_mp_irq(struct mpc_intsrc *m,
- struct mpc_intsrc *mp_irq)
-{
- memcpy(mp_irq, m, sizeof(struct mpc_intsrc));
-}
-
-static int mp_irq_cmp(struct mpc_intsrc *mp_irq,
- struct mpc_intsrc *m)
-{
- return memcmp(mp_irq, m, sizeof(struct mpc_intsrc));
-}
-
-static void save_mp_irq(struct mpc_intsrc *m)
-{
- int i;
-
- for (i = 0; i < mp_irq_entries; i++) {
- if (!mp_irq_cmp(&mp_irqs[i], m))
- return;
- }
-
- assign_to_mp_irq(m, &mp_irqs[mp_irq_entries]);
- if (++mp_irq_entries == MAX_IRQ_SOURCES)
- panic("Max # of irq sources exceeded!!\n");
-}
-
void __init mp_override_legacy_irq(u8 bus_irq, u8 polarity, u8 trigger, u32 gsi)
{
int ioapic;
@@ -979,7 +953,7 @@ void __init mp_override_legacy_irq(u8 bus_irq, u8 polarity, u8 trigger, u32 gsi)
mp_irq.dstapic = mp_ioapics[ioapic].apicid; /* APIC ID */
mp_irq.dstirq = pin; /* INTIN# */

- save_mp_irq(&mp_irq);
+ mp_save_irq(&mp_irq);

isa_irq_to_gsi[bus_irq] = gsi;
}
@@ -1054,7 +1028,7 @@ void __init mp_config_acpi_legacy_irqs(void)
mp_irq.srcbusirq = i; /* Identity mapped */
mp_irq.dstirq = pin;

- save_mp_irq(&mp_irq);
+ mp_save_irq(&mp_irq);
}
}

@@ -1091,7 +1065,7 @@ static int mp_config_acpi_gsi(struct device *dev, u32 gsi, int trigger,
mp_irq.dstapic = mp_ioapics[ioapic].apicid;
mp_irq.dstirq = mp_find_ioapic_pin(ioapic, gsi);

- save_mp_irq(&mp_irq);
+ mp_save_irq(&mp_irq);
#endif
return 0;
}
diff --git a/arch/x86/kernel/mpparse.c b/arch/x86/kernel/mpparse.c
index 5ae5d24..f5491f7 100644
--- a/arch/x86/kernel/mpparse.c
+++ b/arch/x86/kernel/mpparse.c
@@ -143,7 +143,7 @@ static void __init print_mp_irq_info(struct mpc_intsrc *mp_irq)
mp_irq->srcbusirq, mp_irq->dstapic, mp_irq->dstirq);
}

-static void __init assign_to_mp_irq(struct mpc_intsrc *m,
+static void assign_to_mp_irq(struct mpc_intsrc *m,
struct mpc_intsrc *mp_irq)
{
mp_irq->dstapic = m->dstapic;
@@ -167,7 +167,7 @@ static void __init assign_to_mpc_intsrc(struct mpc_intsrc *mp_irq,
m->dstirq = mp_irq->dstirq;
}

-static int __init mp_irq_mpc_intsrc_cmp(struct mpc_intsrc *mp_irq,
+static int mp_irq_mpc_intsrc_cmp(struct mpc_intsrc *mp_irq,
struct mpc_intsrc *m)
{
if (mp_irq->dstapic != m->dstapic)
@@ -188,7 +188,8 @@ static int __init mp_irq_mpc_intsrc_cmp(struct mpc_intsrc *mp_irq,
return 0;
}

-static void __init MP_intsrc_info(struct mpc_intsrc *m)
+/* Will also be called in acpi/sfi related code */
+void mp_save_irq(struct mpc_intsrc *m)
{
int i;

@@ -206,7 +207,6 @@ static void __init MP_intsrc_info(struct mpc_intsrc *m)
#else /* CONFIG_X86_IO_APIC */
static inline void __init MP_bus_info(struct mpc_bus *m) {}
static inline void __init MP_ioapic_info(struct mpc_ioapic *m) {}
-static inline void __init MP_intsrc_info(struct mpc_intsrc *m) {}
#endif /* CONFIG_X86_IO_APIC */

@@ -320,7 +320,7 @@ static int __init smp_read_mpc(struct mpc_table *mpc, unsigned early)
skip_entry(&mpt, &count, sizeof(struct mpc_ioapic));
break;
case MP_INTSRC:
- MP_intsrc_info((struct mpc_intsrc *)mpt);
+ mp_save_irq((struct mpc_intsrc *)mpt);
skip_entry(&mpt, &count, sizeof(struct mpc_intsrc));
break;
case MP_LINTSRC:
@@ -412,13 +412,13 @@ static void __init construct_default_ioirq_mptable(int mpc_default_type)

intsrc.srcbusirq = i;
intsrc.dstirq = i ? i : 2; /* IRQ0 to INTIN2 */
- MP_intsrc_info(&intsrc);
+ mp_save_irq(&intsrc);
}

intsrc.irqtype = mp_ExtINT;
intsrc.srcbusirq = 0;
intsrc.dstirq = 0; /* 8259A to INTIN0 */
- MP_intsrc_info(&intsrc);
+ mp_save_irq(&intsrc);
}

diff --git a/arch/x86/kernel/mrst.c b/arch/x86/kernel/mrst.c
index e796448..def416c 100644
--- a/arch/x86/kernel/mrst.c
+++ b/arch/x86/kernel/mrst.c
@@ -33,32 +33,6 @@ struct sfi_rtc_table_entry sfi_mrtc_array[SFI_MRTC_MAX];
EXPORT_SYMBOL_GPL(sfi_mrtc_array);
int sfi_mrtc_num;

-static inline void assign_to_mp_irq(struct mpc_intsrc *m,
- struct mpc_intsrc *mp_irq)
-{
- memcpy(mp_irq, m, sizeof(struct mpc_intsrc));
-}
-
-static inline int mp_irq_cmp(struct mpc_intsrc *mp_irq,
- struct mpc_intsrc *m)
-{
- return memcmp(mp_irq, m, sizeof(struct mpc_intsrc));
-}
-
-static void save_mp_irq(struct mpc_intsrc *m)
-{
- int i;
-
- for (i = 0; i < mp_irq_entries; i++) {
- if (!mp_irq_cmp(&mp_irqs[i], m))
- return;
- }
-
- assign_to_mp_irq(m, &mp_irqs[mp_irq_entries]);
- if (++mp_irq_entries == MAX_IRQ_SOURCES)
- panic("Max # of irq sources exceeded!!\n");
-}
-
/* parse all the mtimer info to a static mtimer array */
static int __init sfi_parse_mtmr(struct sfi_table_header *table)
{
@@ -92,7 +66,7 @@ static int __init sfi_parse_mtmr(struct sfi_table_header *table)
mp_irq.srcbusirq = pentry->irq; /* IRQ */
mp_irq.dstapic = MP_APIC_ALL;
mp_irq.dstirq = pentry->irq;
- save_mp_irq(&mp_irq);
+ mp_save_irq(&mp_irq);
}

return 0;
@@ -162,7 +136,7 @@ int __init sfi_parse_mrtc(struct sfi_table_header *table)
mp_irq.srcbusirq = pentry->irq; /* IRQ */
mp_irq.dstapic = MP_APIC_ALL;
mp_irq.dstirq = pentry->irq;
- save_mp_irq(&mp_irq);
+ mp_save_irq(&mp_irq);
}
return 0;
}
--
1.6.3.3