[PATCH v11 3/7] LoongArch: Move irqchip function prototypes to irq-loongson.h

[PATCH v11 3/7] LoongArch: Move irqchip function prototypes to irq-loongson.h

[Tianyang Zhang]

From: Huacai Chen <chenhuacai@loongson.cn>

Some irqchip functions are only for internal use by irqchip drivers, so
move their prototypes from asm/irq.h to drivers/irqchip/irq-loongson.h.

All related driver files include the new irq-loongson.h.

Signed-off-by: Huacai Chen <chenhuacai@loongson.cn>
Signed-off-by: Tianyang Zhang <zhangtianyang@loongson.cn>
---
 arch/loongarch/include/asm/irq.h       | 14 --------------
 drivers/irqchip/irq-loongarch-cpu.c    |  2 ++
 drivers/irqchip/irq-loongson-eiointc.c |  2 ++
 drivers/irqchip/irq-loongson-htvec.c   |  2 ++
 drivers/irqchip/irq-loongson-liointc.c |  2 ++
 drivers/irqchip/irq-loongson-pch-lpc.c |  2 ++
 drivers/irqchip/irq-loongson-pch-msi.c |  1 +
 drivers/irqchip/irq-loongson-pch-pic.c |  2 ++
 drivers/irqchip/irq-loongson.h         | 25 +++++++++++++++++++++++++
 9 files changed, 38 insertions(+), 14 deletions(-)
 create mode 100644 drivers/irqchip/irq-loongson.h

diff --git a/arch/loongarch/include/asm/irq.h b/arch/loongarch/include/asm/irq.h
index 480418bc5071..65503c9eb529 100644
--- a/arch/loongarch/include/asm/irq.h
+++ b/arch/loongarch/include/asm/irq.h
@@ -88,20 +88,6 @@ struct acpi_madt_bio_pic;
 struct acpi_madt_msi_pic;
 struct acpi_madt_lpc_pic;
 
-int liointc_acpi_init(struct irq_domain *parent,
-					struct acpi_madt_lio_pic *acpi_liointc);
-int eiointc_acpi_init(struct irq_domain *parent,
-					struct acpi_madt_eio_pic *acpi_eiointc);
-
-int htvec_acpi_init(struct irq_domain *parent,
-					struct acpi_madt_ht_pic *acpi_htvec);
-int pch_lpc_acpi_init(struct irq_domain *parent,
-					struct acpi_madt_lpc_pic *acpi_pchlpc);
-int pch_msi_acpi_init(struct irq_domain *parent,
-					struct acpi_madt_msi_pic *acpi_pchmsi);
-int pch_pic_acpi_init(struct irq_domain *parent,
-					struct acpi_madt_bio_pic *acpi_pchpic);
-int find_pch_pic(u32 gsi);
 struct fwnode_handle *get_pch_msi_handle(int pci_segment);
 
 extern struct acpi_madt_lio_pic *acpi_liointc;
diff --git a/drivers/irqchip/irq-loongarch-cpu.c b/drivers/irqchip/irq-loongarch-cpu.c
index 9d8f2c406043..83f7492290a8 100644
--- a/drivers/irqchip/irq-loongarch-cpu.c
+++ b/drivers/irqchip/irq-loongarch-cpu.c
@@ -13,6 +13,8 @@
 #include <asm/loongarch.h>
 #include <asm/setup.h>
 
+#include "irq-loongson.h"
+
 static struct irq_domain *irq_domain;
 struct fwnode_handle *cpuintc_handle;
 
diff --git a/drivers/irqchip/irq-loongson-eiointc.c b/drivers/irqchip/irq-loongson-eiointc.c
index b1f2080be2be..34b5ca2f5e62 100644
--- a/drivers/irqchip/irq-loongson-eiointc.c
+++ b/drivers/irqchip/irq-loongson-eiointc.c
@@ -17,6 +17,8 @@
 #include <linux/syscore_ops.h>
 #include <asm/numa.h>
 
+#include "irq-loongson.h"
+
 #define EIOINTC_REG_NODEMAP	0x14a0
 #define EIOINTC_REG_IPMAP	0x14c0
 #define EIOINTC_REG_ENABLE	0x1600
diff --git a/drivers/irqchip/irq-loongson-htvec.c b/drivers/irqchip/irq-loongson-htvec.c
index 0bff728b25e3..5da02c7ad0b3 100644
--- a/drivers/irqchip/irq-loongson-htvec.c
+++ b/drivers/irqchip/irq-loongson-htvec.c
@@ -17,6 +17,8 @@
 #include <linux/of_irq.h>
 #include <linux/syscore_ops.h>
 
+#include "irq-loongson.h"
+
 /* Registers */
 #define HTVEC_EN_OFF		0x20
 #define HTVEC_MAX_PARENT_IRQ	8
diff --git a/drivers/irqchip/irq-loongson-liointc.c b/drivers/irqchip/irq-loongson-liointc.c
index 7c4fe7ab4b83..2b1bd4a96665 100644
--- a/drivers/irqchip/irq-loongson-liointc.c
+++ b/drivers/irqchip/irq-loongson-liointc.c
@@ -22,6 +22,8 @@
 #include <asm/loongson.h>
 #endif
 
+#include "irq-loongson.h"
+
 #define LIOINTC_CHIP_IRQ	32
 #define LIOINTC_NUM_PARENT	4
 #define LIOINTC_NUM_CORES	4
diff --git a/drivers/irqchip/irq-loongson-pch-lpc.c b/drivers/irqchip/irq-loongson-pch-lpc.c
index 9b35492fb6be..2d4c3ec128b8 100644
--- a/drivers/irqchip/irq-loongson-pch-lpc.c
+++ b/drivers/irqchip/irq-loongson-pch-lpc.c
@@ -15,6 +15,8 @@
 #include <linux/kernel.h>
 #include <linux/syscore_ops.h>
 
+#include "irq-loongson.h"
+
 /* Registers */
 #define LPC_INT_CTL		0x00
 #define LPC_INT_ENA		0x04
diff --git a/drivers/irqchip/irq-loongson-pch-msi.c b/drivers/irqchip/irq-loongson-pch-msi.c
index 2242f63c66fc..d43731878800 100644
--- a/drivers/irqchip/irq-loongson-pch-msi.c
+++ b/drivers/irqchip/irq-loongson-pch-msi.c
@@ -16,6 +16,7 @@
 #include <linux/slab.h>
 
 #include "irq-msi-lib.h"
+#include "irq-loongson.h"
 
 static int nr_pics;
 
diff --git a/drivers/irqchip/irq-loongson-pch-pic.c b/drivers/irqchip/irq-loongson-pch-pic.c
index cbaef65e804c..69efda35a8e7 100644
--- a/drivers/irqchip/irq-loongson-pch-pic.c
+++ b/drivers/irqchip/irq-loongson-pch-pic.c
@@ -17,6 +17,8 @@
 #include <linux/of_irq.h>
 #include <linux/syscore_ops.h>
 
+#include "irq-loongson.h"
+
 /* Registers */
 #define PCH_PIC_MASK		0x20
 #define PCH_PIC_HTMSI_EN	0x40
diff --git a/drivers/irqchip/irq-loongson.h b/drivers/irqchip/irq-loongson.h
new file mode 100644
index 000000000000..b155f1258ed5
--- /dev/null
+++ b/drivers/irqchip/irq-loongson.h
@@ -0,0 +1,25 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+/*
+ * Copyright (C) 2024 Loongson Technology Corporation Limited
+ */
+
+#ifndef _DRIVERS_IRQCHIP_IRQ_LOONGSON_H
+#define _DRIVERS_IRQCHIP_IRQ_LOONGSON_H
+
+int find_pch_pic(u32 gsi);
+
+int liointc_acpi_init(struct irq_domain *parent,
+					struct acpi_madt_lio_pic *acpi_liointc);
+int eiointc_acpi_init(struct irq_domain *parent,
+					struct acpi_madt_eio_pic *acpi_eiointc);
+
+int htvec_acpi_init(struct irq_domain *parent,
+					struct acpi_madt_ht_pic *acpi_htvec);
+int pch_lpc_acpi_init(struct irq_domain *parent,
+					struct acpi_madt_lpc_pic *acpi_pchlpc);
+int pch_pic_acpi_init(struct irq_domain *parent,
+					struct acpi_madt_bio_pic *acpi_pchpic);
+int pch_msi_acpi_init(struct irq_domain *parent,
+					struct acpi_madt_msi_pic *acpi_pchmsi);
+
+#endif /* _DRIVERS_IRQCHIP_IRQ_LOONGSON_H */
-- 
2.20.1

[PATCH v11 4/7] LoongArch: Architectural preparation for AVEC irqchip

[Tianyang Zhang]

From: Huacai Chen <chenhuacai@loongson.cn>

Add architectural preparation for AVEC irqchip, including:
1. CPUCFG feature bits definition for AVEC;
2. Detection of AVEC irqchip in cpu_probe();
3. New IPI type definition (IPI_CLEAR_VECTOR) for AVEC;
4. Provide arch_probe_nr_irqs() for large NR_IRQS;
5. Other related changes about the number of interrupts.

Signed-off-by: Huacai Chen <chenhuacai@loongson.cn>
Signed-off-by: Tianyang Zhang <zhangtianyang@loongson.cn>
---
 arch/loongarch/include/asm/cpu-features.h |  1 +
 arch/loongarch/include/asm/cpu.h          |  2 ++
 arch/loongarch/include/asm/hardirq.h      |  3 ++-
 arch/loongarch/include/asm/irq.h          | 15 +++++++++++++--
 arch/loongarch/include/asm/loongarch.h    | 18 ++++++++++++++----
 arch/loongarch/include/asm/smp.h          |  2 ++
 arch/loongarch/kernel/cpu-probe.c         |  3 ++-
 arch/loongarch/kernel/irq.c               | 12 ++++++++++++
 8 files changed, 48 insertions(+), 8 deletions(-)

diff --git a/arch/loongarch/include/asm/cpu-features.h b/arch/loongarch/include/asm/cpu-features.h
index 2eafe6a6aca8..16a716f88a5c 100644
--- a/arch/loongarch/include/asm/cpu-features.h
+++ b/arch/loongarch/include/asm/cpu-features.h
@@ -65,5 +65,6 @@
 #define cpu_has_guestid		cpu_opt(LOONGARCH_CPU_GUESTID)
 #define cpu_has_hypervisor	cpu_opt(LOONGARCH_CPU_HYPERVISOR)
 #define cpu_has_ptw		cpu_opt(LOONGARCH_CPU_PTW)
+#define cpu_has_avecint		cpu_opt(LOONGARCH_CPU_AVECINT)
 
 #endif /* __ASM_CPU_FEATURES_H */
diff --git a/arch/loongarch/include/asm/cpu.h b/arch/loongarch/include/asm/cpu.h
index 48b9f7168bcc..843f9c4ec980 100644
--- a/arch/loongarch/include/asm/cpu.h
+++ b/arch/loongarch/include/asm/cpu.h
@@ -99,6 +99,7 @@ enum cpu_type_enum {
 #define CPU_FEATURE_GUESTID		24	/* CPU has GuestID feature */
 #define CPU_FEATURE_HYPERVISOR		25	/* CPU has hypervisor (running in VM) */
 #define CPU_FEATURE_PTW			26	/* CPU has hardware page table walker */
+#define CPU_FEATURE_AVECINT		27	/* CPU has avec interrupt */
 
 #define LOONGARCH_CPU_CPUCFG		BIT_ULL(CPU_FEATURE_CPUCFG)
 #define LOONGARCH_CPU_LAM		BIT_ULL(CPU_FEATURE_LAM)
@@ -127,5 +128,6 @@ enum cpu_type_enum {
 #define LOONGARCH_CPU_GUESTID		BIT_ULL(CPU_FEATURE_GUESTID)
 #define LOONGARCH_CPU_HYPERVISOR	BIT_ULL(CPU_FEATURE_HYPERVISOR)
 #define LOONGARCH_CPU_PTW		BIT_ULL(CPU_FEATURE_PTW)
+#define LOONGARCH_CPU_AVECINT		BIT_ULL(CPU_FEATURE_AVECINT)
 
 #endif /* _ASM_CPU_H */
diff --git a/arch/loongarch/include/asm/hardirq.h b/arch/loongarch/include/asm/hardirq.h
index 1d7feb719515..10da8d6961cb 100644
--- a/arch/loongarch/include/asm/hardirq.h
+++ b/arch/loongarch/include/asm/hardirq.h
@@ -12,12 +12,13 @@
 extern void ack_bad_irq(unsigned int irq);
 #define ack_bad_irq ack_bad_irq
 
-#define NR_IPI	3
+#define NR_IPI	4
 
 enum ipi_msg_type {
 	IPI_RESCHEDULE,
 	IPI_CALL_FUNCTION,
 	IPI_IRQ_WORK,
+	IPI_CLEAR_VECTOR,
 };
 
 typedef struct {
diff --git a/arch/loongarch/include/asm/irq.h b/arch/loongarch/include/asm/irq.h
index 65503c9eb529..c4835800c8b9 100644
--- a/arch/loongarch/include/asm/irq.h
+++ b/arch/loongarch/include/asm/irq.h
@@ -39,11 +39,22 @@ void spurious_interrupt(void);
 
 #define NR_IRQS_LEGACY 16
 
+/*
+ * 256 Vectors Mapping for AVECINTC:
+ *
+ * 0 - 15: Mapping classic IPs, e.g. IP0-12.
+ * 16 - 255: Mapping vectors for external IRQ.
+ *
+ */
+#define NR_VECTORS		256
+#define NR_LEGACY_VECTORS	16
+#define IRQ_MATRIX_BITS		NR_VECTORS
+
 #define arch_trigger_cpumask_backtrace arch_trigger_cpumask_backtrace
 void arch_trigger_cpumask_backtrace(const struct cpumask *mask, int exclude_cpu);
 
 #define MAX_IO_PICS 2
-#define NR_IRQS	(64 + (256 * MAX_IO_PICS))
+#define NR_IRQS	(64 + NR_VECTORS * (NR_CPUS + MAX_IO_PICS))
 
 struct acpi_vector_group {
 	int node;
@@ -65,7 +76,7 @@ extern struct acpi_vector_group msi_group[MAX_IO_PICS];
 #define LOONGSON_LPC_LAST_IRQ		(LOONGSON_LPC_IRQ_BASE + 15)
 
 #define LOONGSON_CPU_IRQ_BASE		16
-#define LOONGSON_CPU_LAST_IRQ		(LOONGSON_CPU_IRQ_BASE + 14)
+#define LOONGSON_CPU_LAST_IRQ		(LOONGSON_CPU_IRQ_BASE + 15)
 
 #define LOONGSON_PCH_IRQ_BASE		64
 #define LOONGSON_PCH_ACPI_IRQ		(LOONGSON_PCH_IRQ_BASE + 47)
diff --git a/arch/loongarch/include/asm/loongarch.h b/arch/loongarch/include/asm/loongarch.h
index 04a78010fc72..631d249b3ef2 100644
--- a/arch/loongarch/include/asm/loongarch.h
+++ b/arch/loongarch/include/asm/loongarch.h
@@ -253,8 +253,8 @@
 #define  CSR_ESTAT_EXC_WIDTH		6
 #define  CSR_ESTAT_EXC			(_ULCAST_(0x3f) << CSR_ESTAT_EXC_SHIFT)
 #define  CSR_ESTAT_IS_SHIFT		0
-#define  CSR_ESTAT_IS_WIDTH		14
-#define  CSR_ESTAT_IS			(_ULCAST_(0x3fff) << CSR_ESTAT_IS_SHIFT)
+#define  CSR_ESTAT_IS_WIDTH		15
+#define  CSR_ESTAT_IS			(_ULCAST_(0x7fff) << CSR_ESTAT_IS_SHIFT)
 
 #define LOONGARCH_CSR_ERA		0x6	/* ERA */
 
@@ -649,6 +649,13 @@
 
 #define LOONGARCH_CSR_CTAG		0x98	/* TagLo + TagHi */
 
+#define LOONGARCH_CSR_ISR0		0xa0
+#define LOONGARCH_CSR_ISR1		0xa1
+#define LOONGARCH_CSR_ISR2		0xa2
+#define LOONGARCH_CSR_ISR3		0xa3
+
+#define LOONGARCH_CSR_IRR		0xa4
+
 #define LOONGARCH_CSR_PRID		0xc0
 
 /* Shadow MCSR : 0xc0 ~ 0xff */
@@ -1011,7 +1018,7 @@
 /*
  * CSR_ECFG IM
  */
-#define ECFG0_IM		0x00001fff
+#define ECFG0_IM		0x00005fff
 #define ECFGB_SIP0		0
 #define ECFGF_SIP0		(_ULCAST_(1) << ECFGB_SIP0)
 #define ECFGB_SIP1		1
@@ -1054,6 +1061,7 @@
 #define  IOCSRF_EIODECODE		BIT_ULL(9)
 #define  IOCSRF_FLATMODE		BIT_ULL(10)
 #define  IOCSRF_VM			BIT_ULL(11)
+#define  IOCSRF_AVEC			BIT_ULL(15)
 
 #define LOONGARCH_IOCSR_VENDOR		0x10
 
@@ -1065,6 +1073,7 @@
 #define  IOCSR_MISC_FUNC_SOFT_INT	BIT_ULL(10)
 #define  IOCSR_MISC_FUNC_TIMER_RESET	BIT_ULL(21)
 #define  IOCSR_MISC_FUNC_EXT_IOI_EN	BIT_ULL(48)
+#define  IOCSR_MISC_FUNC_AVEC_EN	BIT_ULL(51)
 
 #define LOONGARCH_IOCSR_CPUTEMP		0x428
 
@@ -1387,9 +1396,10 @@ __BUILD_CSR_OP(tlbidx)
 #define INT_TI		11	/* Timer */
 #define INT_IPI		12
 #define INT_NMI		13
+#define INT_AVEC	14
 
 /* ExcCodes corresponding to interrupts */
-#define EXCCODE_INT_NUM		(INT_NMI + 1)
+#define EXCCODE_INT_NUM		(INT_AVEC + 1)
 #define EXCCODE_INT_START	64
 #define EXCCODE_INT_END		(EXCCODE_INT_START + EXCCODE_INT_NUM - 1)
 
diff --git a/arch/loongarch/include/asm/smp.h b/arch/loongarch/include/asm/smp.h
index 50db503f44e3..3383c9d24e94 100644
--- a/arch/loongarch/include/asm/smp.h
+++ b/arch/loongarch/include/asm/smp.h
@@ -70,10 +70,12 @@ extern int __cpu_logical_map[NR_CPUS];
 #define ACTION_RESCHEDULE	1
 #define ACTION_CALL_FUNCTION	2
 #define ACTION_IRQ_WORK		3
+#define ACTION_CLEAR_VECTOR	4
 #define SMP_BOOT_CPU		BIT(ACTION_BOOT_CPU)
 #define SMP_RESCHEDULE		BIT(ACTION_RESCHEDULE)
 #define SMP_CALL_FUNCTION	BIT(ACTION_CALL_FUNCTION)
 #define SMP_IRQ_WORK		BIT(ACTION_IRQ_WORK)
+#define SMP_CLEAR_VECTOR	BIT(ACTION_CLEAR_VECTOR)
 
 struct secondary_data {
 	unsigned long stack;
diff --git a/arch/loongarch/kernel/cpu-probe.c b/arch/loongarch/kernel/cpu-probe.c
index 55320813ee08..14f0449f5452 100644
--- a/arch/loongarch/kernel/cpu-probe.c
+++ b/arch/loongarch/kernel/cpu-probe.c
@@ -106,7 +106,6 @@ static void cpu_probe_common(struct cpuinfo_loongarch *c)
 		elf_hwcap |= HWCAP_LOONGARCH_CRC32;
 	}
 
-
 	config = read_cpucfg(LOONGARCH_CPUCFG2);
 	if (config & CPUCFG2_LAM) {
 		c->options |= LOONGARCH_CPU_LAM;
@@ -174,6 +173,8 @@ static void cpu_probe_common(struct cpuinfo_loongarch *c)
 		c->options |= LOONGARCH_CPU_FLATMODE;
 	if (config & IOCSRF_EIODECODE)
 		c->options |= LOONGARCH_CPU_EIODECODE;
+	if (config & IOCSRF_AVEC)
+		c->options |= LOONGARCH_CPU_AVECINT;
 	if (config & IOCSRF_VM)
 		c->options |= LOONGARCH_CPU_HYPERVISOR;
 
diff --git a/arch/loongarch/kernel/irq.c b/arch/loongarch/kernel/irq.c
index adac8fcbb2ac..d129039b368b 100644
--- a/arch/loongarch/kernel/irq.c
+++ b/arch/loongarch/kernel/irq.c
@@ -87,6 +87,18 @@ static void __init init_vec_parent_group(void)
 	acpi_table_parse(ACPI_SIG_MCFG, early_pci_mcfg_parse);
 }
 
+int __init arch_probe_nr_irqs(void)
+{
+	int nr_io_pics = bitmap_weight(loongson_sysconf.cores_io_master, NR_CPUS);
+
+	if (!cpu_has_avecint)
+		nr_irqs = (64 + NR_VECTORS * nr_io_pics);
+	else
+		nr_irqs = (64 + NR_VECTORS * (nr_cpu_ids + nr_io_pics));
+
+	return NR_IRQS_LEGACY;
+}
+
 void __init init_IRQ(void)
 {
 	int i;
-- 
2.20.1

[PATCH v11 5/7] irqchip/loongson-eiointc: Rename CPUHP_AP_IRQ_LOONGARCH_STARTING

[Tianyang Zhang]

From: Huacai Chen <chenhuacai@loongson.cn>

Rename CPUHP_AP_IRQ_LOONGARCH_STARTING to CPUHP_AP_IRQ_EIOINTC_STARTING
because the upcoming AVECINTC irqchip driver will introduce a new state
named CPUHP_AP_IRQ_AVECINTC_STARTING.

Signed-off-by: Huacai Chen <chenhuacai@loongson.cn>
Signed-off-by: Tianyang Zhang <zhangtianyang@loongson.cn>
---
 drivers/irqchip/irq-loongson-eiointc.c | 4 ++--
 include/linux/cpuhotplug.h             | 2 +-
 2 files changed, 3 insertions(+), 3 deletions(-)

diff --git a/drivers/irqchip/irq-loongson-eiointc.c b/drivers/irqchip/irq-loongson-eiointc.c
index 34b5ca2f5e62..c756b7aa8055 100644
--- a/drivers/irqchip/irq-loongson-eiointc.c
+++ b/drivers/irqchip/irq-loongson-eiointc.c
@@ -398,8 +398,8 @@ static int __init eiointc_init(struct eiointc_priv *priv, int parent_irq,
 
 	if (nr_pics == 1) {
 		register_syscore_ops(&eiointc_syscore_ops);
-		cpuhp_setup_state_nocalls(CPUHP_AP_IRQ_LOONGARCH_STARTING,
-					  "irqchip/loongarch/intc:starting",
+		cpuhp_setup_state_nocalls(CPUHP_AP_IRQ_EIOINTC_STARTING,
+					  "irqchip/loongarch/eiointc:starting",
 					  eiointc_router_init, NULL);
 	}
 
diff --git a/include/linux/cpuhotplug.h b/include/linux/cpuhotplug.h
index 51ba681b915a..e49807f7805c 100644
--- a/include/linux/cpuhotplug.h
+++ b/include/linux/cpuhotplug.h
@@ -145,7 +145,7 @@ enum cpuhp_state {
 	CPUHP_AP_IRQ_ARMADA_XP_STARTING,
 	CPUHP_AP_IRQ_BCM2836_STARTING,
 	CPUHP_AP_IRQ_MIPS_GIC_STARTING,
-	CPUHP_AP_IRQ_LOONGARCH_STARTING,
+	CPUHP_AP_IRQ_EIOINTC_STARTING,
 	CPUHP_AP_IRQ_SIFIVE_PLIC_STARTING,
 	CPUHP_AP_IRQ_RISCV_IMSIC_STARTING,
 	CPUHP_AP_ARM_MVEBU_COHERENCY,
-- 
2.20.1

[tip: irq/core] irqchip/loongson-eiointc: Rename CPUHP_AP_IRQ_LOONGARCH_STARTING

[tip-bot2 for Huacai Chen]

The following commit has been merged into the irq/core branch of tip:

Commit-ID:     9e83dd3ebb14fadccb936308b7b101c75da76324
Gitweb:        https://git.kernel.org/tip/9e83dd3ebb14fadccb936308b7b101c75da76324
Author:        Huacai Chen <chenhuacai@loongson.cn>
AuthorDate:    Fri, 23 Aug 2024 18:39:34 +08:00
Committer:     Thomas Gleixner <tglx@linutronix.de>
CommitterDate: Fri, 23 Aug 2024 20:40:27 +02:00

irqchip/loongson-eiointc: Rename CPUHP_AP_IRQ_LOONGARCH_STARTING

Rename CPUHP_AP_IRQ_LOONGARCH_STARTING to CPUHP_AP_IRQ_EIOINTC_STARTING
because the upcoming AVECINTC irqchip driver will introduce a new state
and so both are clearly identifiable.

Signed-off-by: Huacai Chen <chenhuacai@loongson.cn>
Signed-off-by: Tianyang Zhang <zhangtianyang@loongson.cn>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Link: https://lore.kernel.org/all/20240823103936.25092-3-zhangtianyang@loongson.cn

---
 drivers/irqchip/irq-loongson-eiointc.c | 4 ++--
 include/linux/cpuhotplug.h             | 2 +-
 2 files changed, 3 insertions(+), 3 deletions(-)

diff --git a/drivers/irqchip/irq-loongson-eiointc.c b/drivers/irqchip/irq-loongson-eiointc.c
index 34b5ca2..c756b7a 100644
--- a/drivers/irqchip/irq-loongson-eiointc.c
+++ b/drivers/irqchip/irq-loongson-eiointc.c
@@ -398,8 +398,8 @@ static int __init eiointc_init(struct eiointc_priv *priv, int parent_irq,
 
 	if (nr_pics == 1) {
 		register_syscore_ops(&eiointc_syscore_ops);
-		cpuhp_setup_state_nocalls(CPUHP_AP_IRQ_LOONGARCH_STARTING,
-					  "irqchip/loongarch/intc:starting",
+		cpuhp_setup_state_nocalls(CPUHP_AP_IRQ_EIOINTC_STARTING,
+					  "irqchip/loongarch/eiointc:starting",
 					  eiointc_router_init, NULL);
 	}
 
diff --git a/include/linux/cpuhotplug.h b/include/linux/cpuhotplug.h
index 51ba681..e49807f 100644
--- a/include/linux/cpuhotplug.h
+++ b/include/linux/cpuhotplug.h
@@ -145,7 +145,7 @@ enum cpuhp_state {
 	CPUHP_AP_IRQ_ARMADA_XP_STARTING,
 	CPUHP_AP_IRQ_BCM2836_STARTING,
 	CPUHP_AP_IRQ_MIPS_GIC_STARTING,
-	CPUHP_AP_IRQ_LOONGARCH_STARTING,
+	CPUHP_AP_IRQ_EIOINTC_STARTING,
 	CPUHP_AP_IRQ_SIFIVE_PLIC_STARTING,
 	CPUHP_AP_IRQ_RISCV_IMSIC_STARTING,
 	CPUHP_AP_ARM_MVEBU_COHERENCY,

[tip: irq/core] LoongArch: Architectural preparation for AVEC irqchip

[tip-bot2 for Huacai Chen]

The following commit has been merged into the irq/core branch of tip:

Commit-ID:     843ed9317be1d0c3f4245418644fc7e55f465419
Gitweb:        https://git.kernel.org/tip/843ed9317be1d0c3f4245418644fc7e55f465419
Author:        Huacai Chen <chenhuacai@loongson.cn>
AuthorDate:    Fri, 23 Aug 2024 18:39:33 +08:00
Committer:     Thomas Gleixner <tglx@linutronix.de>
CommitterDate: Fri, 23 Aug 2024 20:40:27 +02:00

LoongArch: Architectural preparation for AVEC irqchip

Add architectural preparation for AVEC irqchip, including:
1. CPUCFG feature bits definition for AVEC;
2. Detection of AVEC irqchip in cpu_probe();
3. New IPI type definition (IPI_CLEAR_VECTOR) for AVEC;
4. Provide arch_probe_nr_irqs() for large NR_IRQS;
5. Other related changes about the number of interrupts.

Signed-off-by: Huacai Chen <chenhuacai@loongson.cn>
Signed-off-by: Tianyang Zhang <zhangtianyang@loongson.cn>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Link: https://lore.kernel.org/all/20240823103936.25092-2-zhangtianyang@loongson.cn

---
 arch/loongarch/include/asm/cpu-features.h |  1 +
 arch/loongarch/include/asm/cpu.h          |  2 ++
 arch/loongarch/include/asm/hardirq.h      |  3 ++-
 arch/loongarch/include/asm/irq.h          | 15 +++++++++++++--
 arch/loongarch/include/asm/loongarch.h    | 18 ++++++++++++++----
 arch/loongarch/include/asm/smp.h          |  2 ++
 arch/loongarch/kernel/cpu-probe.c         |  3 ++-
 arch/loongarch/kernel/irq.c               | 12 ++++++++++++
 8 files changed, 48 insertions(+), 8 deletions(-)

diff --git a/arch/loongarch/include/asm/cpu-features.h b/arch/loongarch/include/asm/cpu-features.h
index 2eafe6a..16a716f 100644
--- a/arch/loongarch/include/asm/cpu-features.h
+++ b/arch/loongarch/include/asm/cpu-features.h
@@ -65,5 +65,6 @@
 #define cpu_has_guestid		cpu_opt(LOONGARCH_CPU_GUESTID)
 #define cpu_has_hypervisor	cpu_opt(LOONGARCH_CPU_HYPERVISOR)
 #define cpu_has_ptw		cpu_opt(LOONGARCH_CPU_PTW)
+#define cpu_has_avecint		cpu_opt(LOONGARCH_CPU_AVECINT)
 
 #endif /* __ASM_CPU_FEATURES_H */
diff --git a/arch/loongarch/include/asm/cpu.h b/arch/loongarch/include/asm/cpu.h
index 48b9f71..843f9c4 100644
--- a/arch/loongarch/include/asm/cpu.h
+++ b/arch/loongarch/include/asm/cpu.h
@@ -99,6 +99,7 @@ enum cpu_type_enum {
 #define CPU_FEATURE_GUESTID		24	/* CPU has GuestID feature */
 #define CPU_FEATURE_HYPERVISOR		25	/* CPU has hypervisor (running in VM) */
 #define CPU_FEATURE_PTW			26	/* CPU has hardware page table walker */
+#define CPU_FEATURE_AVECINT		27	/* CPU has avec interrupt */
 
 #define LOONGARCH_CPU_CPUCFG		BIT_ULL(CPU_FEATURE_CPUCFG)
 #define LOONGARCH_CPU_LAM		BIT_ULL(CPU_FEATURE_LAM)
@@ -127,5 +128,6 @@ enum cpu_type_enum {
 #define LOONGARCH_CPU_GUESTID		BIT_ULL(CPU_FEATURE_GUESTID)
 #define LOONGARCH_CPU_HYPERVISOR	BIT_ULL(CPU_FEATURE_HYPERVISOR)
 #define LOONGARCH_CPU_PTW		BIT_ULL(CPU_FEATURE_PTW)
+#define LOONGARCH_CPU_AVECINT		BIT_ULL(CPU_FEATURE_AVECINT)
 
 #endif /* _ASM_CPU_H */
diff --git a/arch/loongarch/include/asm/hardirq.h b/arch/loongarch/include/asm/hardirq.h
index 1d7feb7..10da8d6 100644
--- a/arch/loongarch/include/asm/hardirq.h
+++ b/arch/loongarch/include/asm/hardirq.h
@@ -12,12 +12,13 @@
 extern void ack_bad_irq(unsigned int irq);
 #define ack_bad_irq ack_bad_irq
 
-#define NR_IPI	3
+#define NR_IPI	4
 
 enum ipi_msg_type {
 	IPI_RESCHEDULE,
 	IPI_CALL_FUNCTION,
 	IPI_IRQ_WORK,
+	IPI_CLEAR_VECTOR,
 };
 
 typedef struct {
diff --git a/arch/loongarch/include/asm/irq.h b/arch/loongarch/include/asm/irq.h
index 65503c9..c483580 100644
--- a/arch/loongarch/include/asm/irq.h
+++ b/arch/loongarch/include/asm/irq.h
@@ -39,11 +39,22 @@ void spurious_interrupt(void);
 
 #define NR_IRQS_LEGACY 16
 
+/*
+ * 256 Vectors Mapping for AVECINTC:
+ *
+ * 0 - 15: Mapping classic IPs, e.g. IP0-12.
+ * 16 - 255: Mapping vectors for external IRQ.
+ *
+ */
+#define NR_VECTORS		256
+#define NR_LEGACY_VECTORS	16
+#define IRQ_MATRIX_BITS		NR_VECTORS
+
 #define arch_trigger_cpumask_backtrace arch_trigger_cpumask_backtrace
 void arch_trigger_cpumask_backtrace(const struct cpumask *mask, int exclude_cpu);
 
 #define MAX_IO_PICS 2
-#define NR_IRQS	(64 + (256 * MAX_IO_PICS))
+#define NR_IRQS	(64 + NR_VECTORS * (NR_CPUS + MAX_IO_PICS))
 
 struct acpi_vector_group {
 	int node;
@@ -65,7 +76,7 @@ extern struct acpi_vector_group msi_group[MAX_IO_PICS];
 #define LOONGSON_LPC_LAST_IRQ		(LOONGSON_LPC_IRQ_BASE + 15)
 
 #define LOONGSON_CPU_IRQ_BASE		16
-#define LOONGSON_CPU_LAST_IRQ		(LOONGSON_CPU_IRQ_BASE + 14)
+#define LOONGSON_CPU_LAST_IRQ		(LOONGSON_CPU_IRQ_BASE + 15)
 
 #define LOONGSON_PCH_IRQ_BASE		64
 #define LOONGSON_PCH_ACPI_IRQ		(LOONGSON_PCH_IRQ_BASE + 47)
diff --git a/arch/loongarch/include/asm/loongarch.h b/arch/loongarch/include/asm/loongarch.h
index 04a7801..631d249 100644
--- a/arch/loongarch/include/asm/loongarch.h
+++ b/arch/loongarch/include/asm/loongarch.h
@@ -253,8 +253,8 @@
 #define  CSR_ESTAT_EXC_WIDTH		6
 #define  CSR_ESTAT_EXC			(_ULCAST_(0x3f) << CSR_ESTAT_EXC_SHIFT)
 #define  CSR_ESTAT_IS_SHIFT		0
-#define  CSR_ESTAT_IS_WIDTH		14
-#define  CSR_ESTAT_IS			(_ULCAST_(0x3fff) << CSR_ESTAT_IS_SHIFT)
+#define  CSR_ESTAT_IS_WIDTH		15
+#define  CSR_ESTAT_IS			(_ULCAST_(0x7fff) << CSR_ESTAT_IS_SHIFT)
 
 #define LOONGARCH_CSR_ERA		0x6	/* ERA */
 
@@ -649,6 +649,13 @@
 
 #define LOONGARCH_CSR_CTAG		0x98	/* TagLo + TagHi */
 
+#define LOONGARCH_CSR_ISR0		0xa0
+#define LOONGARCH_CSR_ISR1		0xa1
+#define LOONGARCH_CSR_ISR2		0xa2
+#define LOONGARCH_CSR_ISR3		0xa3
+
+#define LOONGARCH_CSR_IRR		0xa4
+
 #define LOONGARCH_CSR_PRID		0xc0
 
 /* Shadow MCSR : 0xc0 ~ 0xff */
@@ -1011,7 +1018,7 @@
 /*
  * CSR_ECFG IM
  */
-#define ECFG0_IM		0x00001fff
+#define ECFG0_IM		0x00005fff
 #define ECFGB_SIP0		0
 #define ECFGF_SIP0		(_ULCAST_(1) << ECFGB_SIP0)
 #define ECFGB_SIP1		1
@@ -1054,6 +1061,7 @@
 #define  IOCSRF_EIODECODE		BIT_ULL(9)
 #define  IOCSRF_FLATMODE		BIT_ULL(10)
 #define  IOCSRF_VM			BIT_ULL(11)
+#define  IOCSRF_AVEC			BIT_ULL(15)
 
 #define LOONGARCH_IOCSR_VENDOR		0x10
 
@@ -1065,6 +1073,7 @@
 #define  IOCSR_MISC_FUNC_SOFT_INT	BIT_ULL(10)
 #define  IOCSR_MISC_FUNC_TIMER_RESET	BIT_ULL(21)
 #define  IOCSR_MISC_FUNC_EXT_IOI_EN	BIT_ULL(48)
+#define  IOCSR_MISC_FUNC_AVEC_EN	BIT_ULL(51)
 
 #define LOONGARCH_IOCSR_CPUTEMP		0x428
 
@@ -1387,9 +1396,10 @@ __BUILD_CSR_OP(tlbidx)
 #define INT_TI		11	/* Timer */
 #define INT_IPI		12
 #define INT_NMI		13
+#define INT_AVEC	14
 
 /* ExcCodes corresponding to interrupts */
-#define EXCCODE_INT_NUM		(INT_NMI + 1)
+#define EXCCODE_INT_NUM		(INT_AVEC + 1)
 #define EXCCODE_INT_START	64
 #define EXCCODE_INT_END		(EXCCODE_INT_START + EXCCODE_INT_NUM - 1)
 
diff --git a/arch/loongarch/include/asm/smp.h b/arch/loongarch/include/asm/smp.h
index 50db503..3383c9d 100644
--- a/arch/loongarch/include/asm/smp.h
+++ b/arch/loongarch/include/asm/smp.h
@@ -70,10 +70,12 @@ extern int __cpu_logical_map[NR_CPUS];
 #define ACTION_RESCHEDULE	1
 #define ACTION_CALL_FUNCTION	2
 #define ACTION_IRQ_WORK		3
+#define ACTION_CLEAR_VECTOR	4
 #define SMP_BOOT_CPU		BIT(ACTION_BOOT_CPU)
 #define SMP_RESCHEDULE		BIT(ACTION_RESCHEDULE)
 #define SMP_CALL_FUNCTION	BIT(ACTION_CALL_FUNCTION)
 #define SMP_IRQ_WORK		BIT(ACTION_IRQ_WORK)
+#define SMP_CLEAR_VECTOR	BIT(ACTION_CLEAR_VECTOR)
 
 struct secondary_data {
 	unsigned long stack;
diff --git a/arch/loongarch/kernel/cpu-probe.c b/arch/loongarch/kernel/cpu-probe.c
index 5532081..14f0449 100644
--- a/arch/loongarch/kernel/cpu-probe.c
+++ b/arch/loongarch/kernel/cpu-probe.c
@@ -106,7 +106,6 @@ static void cpu_probe_common(struct cpuinfo_loongarch *c)
 		elf_hwcap |= HWCAP_LOONGARCH_CRC32;
 	}
 
-
 	config = read_cpucfg(LOONGARCH_CPUCFG2);
 	if (config & CPUCFG2_LAM) {
 		c->options |= LOONGARCH_CPU_LAM;
@@ -174,6 +173,8 @@ static void cpu_probe_common(struct cpuinfo_loongarch *c)
 		c->options |= LOONGARCH_CPU_FLATMODE;
 	if (config & IOCSRF_EIODECODE)
 		c->options |= LOONGARCH_CPU_EIODECODE;
+	if (config & IOCSRF_AVEC)
+		c->options |= LOONGARCH_CPU_AVECINT;
 	if (config & IOCSRF_VM)
 		c->options |= LOONGARCH_CPU_HYPERVISOR;
 
diff --git a/arch/loongarch/kernel/irq.c b/arch/loongarch/kernel/irq.c
index f4991c0..414f524 100644
--- a/arch/loongarch/kernel/irq.c
+++ b/arch/loongarch/kernel/irq.c
@@ -87,6 +87,18 @@ static void __init init_vec_parent_group(void)
 	acpi_table_parse(ACPI_SIG_MCFG, early_pci_mcfg_parse);
 }
 
+int __init arch_probe_nr_irqs(void)
+{
+	int nr_io_pics = bitmap_weight(loongson_sysconf.cores_io_master, NR_CPUS);
+
+	if (!cpu_has_avecint)
+		nr_irqs = (64 + NR_VECTORS * nr_io_pics);
+	else
+		nr_irqs = (64 + NR_VECTORS * (nr_cpu_ids + nr_io_pics));
+
+	return NR_IRQS_LEGACY;
+}
+
 void __init init_IRQ(void)
 {
 	int i;

[tip: irq/core] LoongArch: Move irqchip function prototypes to irq-loongson.h

[tip-bot2 for Huacai Chen]

The following commit has been merged into the irq/core branch of tip:

Commit-ID:     06fac729a6d54e2c6650b38734f84383aafb3acc
Gitweb:        https://git.kernel.org/tip/06fac729a6d54e2c6650b38734f84383aafb3acc
Author:        Huacai Chen <chenhuacai@loongson.cn>
AuthorDate:    Fri, 23 Aug 2024 18:39:32 +08:00
Committer:     Thomas Gleixner <tglx@linutronix.de>
CommitterDate: Fri, 23 Aug 2024 20:40:27 +02:00

LoongArch: Move irqchip function prototypes to irq-loongson.h

Some irqchip functions are only for internal use by irqchip drivers, so
move their prototypes from asm/irq.h to drivers/irqchip/irq-loongson.h.

All related driver files include the new irq-loongson.h.

Signed-off-by: Huacai Chen <chenhuacai@loongson.cn>
Signed-off-by: Tianyang Zhang <zhangtianyang@loongson.cn>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Link: https://lore.kernel.org/all/20240823103936.25092-1-zhangtianyang@loongson.cn

---
 arch/loongarch/include/asm/irq.h       | 14 +--------------
 drivers/irqchip/irq-loongarch-cpu.c    |  2 ++-
 drivers/irqchip/irq-loongson-eiointc.c |  2 ++-
 drivers/irqchip/irq-loongson-htvec.c   |  2 ++-
 drivers/irqchip/irq-loongson-liointc.c |  2 ++-
 drivers/irqchip/irq-loongson-pch-lpc.c |  2 ++-
 drivers/irqchip/irq-loongson-pch-msi.c |  1 +-
 drivers/irqchip/irq-loongson-pch-pic.c |  2 ++-
 drivers/irqchip/irq-loongson.h         | 25 +++++++++++++++++++++++++-
 9 files changed, 38 insertions(+), 14 deletions(-)
 create mode 100644 drivers/irqchip/irq-loongson.h

diff --git a/arch/loongarch/include/asm/irq.h b/arch/loongarch/include/asm/irq.h
index 480418b..65503c9 100644
--- a/arch/loongarch/include/asm/irq.h
+++ b/arch/loongarch/include/asm/irq.h
@@ -88,20 +88,6 @@ struct acpi_madt_bio_pic;
 struct acpi_madt_msi_pic;
 struct acpi_madt_lpc_pic;
 
-int liointc_acpi_init(struct irq_domain *parent,
-					struct acpi_madt_lio_pic *acpi_liointc);
-int eiointc_acpi_init(struct irq_domain *parent,
-					struct acpi_madt_eio_pic *acpi_eiointc);
-
-int htvec_acpi_init(struct irq_domain *parent,
-					struct acpi_madt_ht_pic *acpi_htvec);
-int pch_lpc_acpi_init(struct irq_domain *parent,
-					struct acpi_madt_lpc_pic *acpi_pchlpc);
-int pch_msi_acpi_init(struct irq_domain *parent,
-					struct acpi_madt_msi_pic *acpi_pchmsi);
-int pch_pic_acpi_init(struct irq_domain *parent,
-					struct acpi_madt_bio_pic *acpi_pchpic);
-int find_pch_pic(u32 gsi);
 struct fwnode_handle *get_pch_msi_handle(int pci_segment);
 
 extern struct acpi_madt_lio_pic *acpi_liointc;
diff --git a/drivers/irqchip/irq-loongarch-cpu.c b/drivers/irqchip/irq-loongarch-cpu.c
index 9d8f2c4..83f7492 100644
--- a/drivers/irqchip/irq-loongarch-cpu.c
+++ b/drivers/irqchip/irq-loongarch-cpu.c
@@ -13,6 +13,8 @@
 #include <asm/loongarch.h>
 #include <asm/setup.h>
 
+#include "irq-loongson.h"
+
 static struct irq_domain *irq_domain;
 struct fwnode_handle *cpuintc_handle;
 
diff --git a/drivers/irqchip/irq-loongson-eiointc.c b/drivers/irqchip/irq-loongson-eiointc.c
index b1f2080..34b5ca2 100644
--- a/drivers/irqchip/irq-loongson-eiointc.c
+++ b/drivers/irqchip/irq-loongson-eiointc.c
@@ -17,6 +17,8 @@
 #include <linux/syscore_ops.h>
 #include <asm/numa.h>
 
+#include "irq-loongson.h"
+
 #define EIOINTC_REG_NODEMAP	0x14a0
 #define EIOINTC_REG_IPMAP	0x14c0
 #define EIOINTC_REG_ENABLE	0x1600
diff --git a/drivers/irqchip/irq-loongson-htvec.c b/drivers/irqchip/irq-loongson-htvec.c
index 0bff728..5da02c7 100644
--- a/drivers/irqchip/irq-loongson-htvec.c
+++ b/drivers/irqchip/irq-loongson-htvec.c
@@ -17,6 +17,8 @@
 #include <linux/of_irq.h>
 #include <linux/syscore_ops.h>
 
+#include "irq-loongson.h"
+
 /* Registers */
 #define HTVEC_EN_OFF		0x20
 #define HTVEC_MAX_PARENT_IRQ	8
diff --git a/drivers/irqchip/irq-loongson-liointc.c b/drivers/irqchip/irq-loongson-liointc.c
index 7c4fe7a..2b1bd4a 100644
--- a/drivers/irqchip/irq-loongson-liointc.c
+++ b/drivers/irqchip/irq-loongson-liointc.c
@@ -22,6 +22,8 @@
 #include <asm/loongson.h>
 #endif
 
+#include "irq-loongson.h"
+
 #define LIOINTC_CHIP_IRQ	32
 #define LIOINTC_NUM_PARENT	4
 #define LIOINTC_NUM_CORES	4
diff --git a/drivers/irqchip/irq-loongson-pch-lpc.c b/drivers/irqchip/irq-loongson-pch-lpc.c
index 9b35492..2d4c3ec 100644
--- a/drivers/irqchip/irq-loongson-pch-lpc.c
+++ b/drivers/irqchip/irq-loongson-pch-lpc.c
@@ -15,6 +15,8 @@
 #include <linux/kernel.h>
 #include <linux/syscore_ops.h>
 
+#include "irq-loongson.h"
+
 /* Registers */
 #define LPC_INT_CTL		0x00
 #define LPC_INT_ENA		0x04
diff --git a/drivers/irqchip/irq-loongson-pch-msi.c b/drivers/irqchip/irq-loongson-pch-msi.c
index 2242f63..d437318 100644
--- a/drivers/irqchip/irq-loongson-pch-msi.c
+++ b/drivers/irqchip/irq-loongson-pch-msi.c
@@ -16,6 +16,7 @@
 #include <linux/slab.h>
 
 #include "irq-msi-lib.h"
+#include "irq-loongson.h"
 
 static int nr_pics;
 
diff --git a/drivers/irqchip/irq-loongson-pch-pic.c b/drivers/irqchip/irq-loongson-pch-pic.c
index cbaef65..69efda3 100644
--- a/drivers/irqchip/irq-loongson-pch-pic.c
+++ b/drivers/irqchip/irq-loongson-pch-pic.c
@@ -17,6 +17,8 @@
 #include <linux/of_irq.h>
 #include <linux/syscore_ops.h>
 
+#include "irq-loongson.h"
+
 /* Registers */
 #define PCH_PIC_MASK		0x20
 #define PCH_PIC_HTMSI_EN	0x40
diff --git a/drivers/irqchip/irq-loongson.h b/drivers/irqchip/irq-loongson.h
new file mode 100644
index 0000000..b155f12
--- /dev/null
+++ b/drivers/irqchip/irq-loongson.h
@@ -0,0 +1,25 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+/*
+ * Copyright (C) 2024 Loongson Technology Corporation Limited
+ */
+
+#ifndef _DRIVERS_IRQCHIP_IRQ_LOONGSON_H
+#define _DRIVERS_IRQCHIP_IRQ_LOONGSON_H
+
+int find_pch_pic(u32 gsi);
+
+int liointc_acpi_init(struct irq_domain *parent,
+					struct acpi_madt_lio_pic *acpi_liointc);
+int eiointc_acpi_init(struct irq_domain *parent,
+					struct acpi_madt_eio_pic *acpi_eiointc);
+
+int htvec_acpi_init(struct irq_domain *parent,
+					struct acpi_madt_ht_pic *acpi_htvec);
+int pch_lpc_acpi_init(struct irq_domain *parent,
+					struct acpi_madt_lpc_pic *acpi_pchlpc);
+int pch_pic_acpi_init(struct irq_domain *parent,
+					struct acpi_madt_bio_pic *acpi_pchpic);
+int pch_msi_acpi_init(struct irq_domain *parent,
+					struct acpi_madt_msi_pic *acpi_pchmsi);
+
+#endif /* _DRIVERS_IRQCHIP_IRQ_LOONGSON_H */