On Thu, Jun 27, 2024 at 4:04 PM Tianyang Zhang <zhangtianyang@xxxxxxxxxxx> wrote: > > > 在 2024/6/26 上午11:23, Huacai Chen 写道: > > Hi, Tianyang, > > > > The title can be a little better: LoongArch: Add AVEC irqchip support > Ok One more comments, you can squash two patches into one, as Song does: https://lore.kernel.org/lkml/20240624084410.1026648-1-gaosong@xxxxxxxxxxx/ Huacai > > > > On Tue, Jun 4, 2024 at 8:50 PM Tianyang Zhang <zhangtianyang@xxxxxxxxxxx> wrote: > >> Introduce the advanced extended interrupt controllers, > >> This feature will allow each core to have an independent > >> 256 interrupt vectors, and MSI interrupts can be > >> independently routed to any vector on any CPU. > >> > >> Co-developed-by: Jianmin Lv <lvjianmin@xxxxxxxxxxx> > >> Signed-off-by: Jianmin Lv <lvjianmin@xxxxxxxxxxx> > >> Co-developed-by: Liupu Wang <wangliupu@xxxxxxxxxxx> > >> Signed-off-by: Liupu Wang <wangliupu@xxxxxxxxxxx> > >> Signed-off-by: Tianyang Zhang <zhangtianyang@xxxxxxxxxxx> > >> --- > >> arch/loongarch/Kconfig | 1 + > >> arch/loongarch/include/asm/cpu-features.h | 1 + > >> arch/loongarch/include/asm/cpu.h | 2 + > >> arch/loongarch/include/asm/hw_irq.h | 10 + > >> arch/loongarch/include/asm/irq.h | 12 +- > >> arch/loongarch/include/asm/loongarch.h | 20 +- > >> arch/loongarch/include/asm/smp.h | 1 + > >> arch/loongarch/kernel/cpu-probe.c | 3 +- > >> arch/loongarch/kernel/smp.c | 5 + > >> drivers/irqchip/Makefile | 2 +- > >> drivers/irqchip/irq-loongarch-avec.c | 423 ++++++++++++++++++++++ > >> drivers/irqchip/irq-loongarch-cpu.c | 4 +- > >> drivers/irqchip/irq-loongson-eiointc.c | 3 + > >> drivers/irqchip/irq-loongson-pch-msi.c | 43 ++- > >> 14 files changed, 520 insertions(+), 10 deletions(-) > >> create mode 100644 drivers/irqchip/irq-loongarch-avec.c > >> > >> Changes log: > >> V0->V1: > >> 1.Modified some formats and declarations > >> 2.Removed kmalloc/kfree when adding affinity related data to pending_list, > >> and used moving tag to replace the original behavior > >> 3.Adjusted the process that enables AVEC interrupts, now it is at the end of all processes > >> 4.Removed CPUHP related callbacks, now irq_matrix_online/irq_matrix_offline is completed in start_secondary/loongson_cpu_disable > >> 5.Adjusted compatibility issues for CONFIG_ACPI > >> 6.About question: > >> > irr = csr_read64(LOONGARCH_CSR_IRR0 + vector / 64); > >> > should be good enough, no? > >> csr_read64 was built-in as __csrrd_d, it doesn't seem to support variables as parameters > >> >>>> > >> drivers/irqchip/irq-loongarch-avec.c: In function ‘complete_irq_moving’: > >> ./arch/loongarch/include/asm/loongarch.h:164:25: error: invalid argument to built-in function > >> 164 | #define csr_read64(reg) __csrrd_d(reg) > >> | ^~~~~~~~~ > >> drivers/irqchip/irq-loongarch-avec.c:170:23: note: in expansion of macro ‘csr_read64’ > >> 170 | irr = csr_read64(LOONGARCH_CSR_IRR_BASE + vector / VECTORS_PER_REG); > >> | ^~~~~~~~~~ > >> >>>> > >> So we have temporarily retained the previous implementation. > >> > >> > >> diff --git a/arch/loongarch/Kconfig b/arch/loongarch/Kconfig > >> index 10959e6c3583..71b8f19745e0 100644 > >> --- a/arch/loongarch/Kconfig > >> +++ b/arch/loongarch/Kconfig > >> @@ -76,6 +76,7 @@ config LOONGARCH > >> select GENERIC_ENTRY > >> select GENERIC_GETTIMEOFDAY > >> select GENERIC_IOREMAP if !ARCH_IOREMAP > >> + select GENERIC_IRQ_MATRIX_ALLOCATOR > >> select GENERIC_IRQ_MULTI_HANDLER > >> select GENERIC_IRQ_PROBE > >> select GENERIC_IRQ_SHOW > >> 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/hw_irq.h b/arch/loongarch/include/asm/hw_irq.h > >> index af4f4e8fbd85..521abce32135 100644 > >> --- a/arch/loongarch/include/asm/hw_irq.h > >> +++ b/arch/loongarch/include/asm/hw_irq.h > >> @@ -9,6 +9,16 @@ > >> > >> extern atomic_t irq_err_count; > >> > >> +/* > >> + * 256 vectors Map: > >> + * > >> + * 0 - 15: mapping legacy IPs, e.g. IP0-12. > >> + * 16 - 255: mapping a vector for external IRQ. > >> + * > >> + */ > >> +#define NR_VECTORS 256 > >> +#define IRQ_MATRIX_BITS NR_VECTORS > >> +#define NR_LEGACY_VECTORS 16 > >> /* > >> * interrupt-retrigger: NOP for now. This may not be appropriate for all > >> * machines, we'll see ... > >> diff --git a/arch/loongarch/include/asm/irq.h b/arch/loongarch/include/asm/irq.h > >> index 218b4da0ea90..4e45a55dedfe 100644 > >> --- a/arch/loongarch/include/asm/irq.h > >> +++ b/arch/loongarch/include/asm/irq.h > >> @@ -65,7 +65,7 @@ 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) > >> @@ -101,6 +101,16 @@ 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); > >> + > >> +#ifdef CONFIG_ACPI > >> +int __init pch_msi_acpi_init_v2(struct irq_domain *parent, > >> + struct acpi_madt_msi_pic *pch_msi_entry); > >> +int __init loongarch_avec_acpi_init(struct irq_domain *parent); > >> +void complete_irq_moving(void); > >> +int loongarch_avec_offline_cpu(unsigned int cpu); > >> +int loongarch_avec_online_cpu(unsigned int cpu); > >> +#endif > >> + > >> int find_pch_pic(u32 gsi); > >> struct fwnode_handle *get_pch_msi_handle(int pci_segment); > >> > >> diff --git a/arch/loongarch/include/asm/loongarch.h b/arch/loongarch/include/asm/loongarch.h > >> index 46366e783c84..84fa70ff2ab3 100644 > >> --- a/arch/loongarch/include/asm/loongarch.h > >> +++ b/arch/loongarch/include/asm/loongarch.h > >> @@ -72,7 +72,6 @@ > >> #define CPUCFG1_RPLV BIT(23) > >> #define CPUCFG1_HUGEPG BIT(24) > >> #define CPUCFG1_CRC32 BIT(25) > >> -#define CPUCFG1_MSGINT BIT(26) > >> > >> #define LOONGARCH_CPUCFG2 0x2 > >> #define CPUCFG2_FP BIT(0) > >> @@ -240,8 +239,8 @@ > >> #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 */ > >> > >> @@ -987,10 +986,18 @@ > >> #define CSR_FWPC_SKIP_SHIFT 16 > >> #define CSR_FWPC_SKIP (_ULCAST_(1) << CSR_FWPC_SKIP_SHIFT) > >> > >> +#define LOONGARCH_CSR_IRR0 0xa0 > >> +#define LOONGARCH_CSR_IRR1 0xa1 > >> +#define LOONGARCH_CSR_IRR2 0xa2 > >> +#define LOONGARCH_CSR_IRR3 0xa3 > >> +#define LOONGARCH_CSR_IRR_BASE LOONGARCH_CSR_IRR0 > >> + > >> +#define LOONGARCH_CSR_ILR 0xa4 > >> + > >> /* > >> * 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 > >> @@ -1033,6 +1040,7 @@ > >> #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 > >> > >> @@ -1043,6 +1051,7 @@ > >> #define LOONGARCH_IOCSR_MISC_FUNC 0x420 > >> #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 > >> > >> @@ -1363,9 +1372,10 @@ __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 f81e5f01d619..577f591c1c73 100644 > >> --- a/arch/loongarch/include/asm/smp.h > >> +++ b/arch/loongarch/include/asm/smp.h > >> @@ -62,6 +62,7 @@ extern int __cpu_logical_map[NR_CPUS]; > >> #define SMP_BOOT_CPU 0x1 > >> #define SMP_RESCHEDULE 0x2 > >> #define SMP_CALL_FUNCTION 0x4 > >> +#define SMP_CLEAR_VECT 0x8 > >> > >> struct secondary_data { > >> unsigned long stack; > >> diff --git a/arch/loongarch/kernel/cpu-probe.c b/arch/loongarch/kernel/cpu-probe.c > >> index 55320813ee08..3b2e72e8f9bd 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; > >> @@ -176,6 +175,8 @@ static void cpu_probe_common(struct cpuinfo_loongarch *c) > >> c->options |= LOONGARCH_CPU_EIODECODE; > >> if (config & IOCSRF_VM) > >> c->options |= LOONGARCH_CPU_HYPERVISOR; > >> + if (config & IOCSRF_AVEC) > >> + c->options |= LOONGARCH_CPU_AVECINT; > >> > >> config = csr_read32(LOONGARCH_CSR_ASID); > >> config = (config & CSR_ASID_BIT) >> CSR_ASID_BIT_SHIFT; > >> diff --git a/arch/loongarch/kernel/smp.c b/arch/loongarch/kernel/smp.c > >> index a16e3dbe9f09..4fb8f411040c 100644 > >> --- a/arch/loongarch/kernel/smp.c > >> +++ b/arch/loongarch/kernel/smp.c > >> @@ -176,6 +176,9 @@ irqreturn_t loongson_ipi_interrupt(int irq, void *dev) > >> per_cpu(irq_stat, cpu).ipi_irqs[IPI_CALL_FUNCTION]++; > >> } > >> > >> + if (action & SMP_CLEAR_VECT) > >> + complete_irq_moving(); > >> + > >> return IRQ_HANDLED; > >> } > >> > >> @@ -308,6 +311,7 @@ int loongson_cpu_disable(void) > >> irq_migrate_all_off_this_cpu(); > >> clear_csr_ecfg(ECFG0_IM); > >> local_irq_restore(flags); > >> + loongarch_avec_offline_cpu(cpu); > >> local_flush_tlb_all(); > >> > >> return 0; > >> @@ -539,6 +543,7 @@ asmlinkage void start_secondary(void) > >> * early is dangerous. > >> */ > >> WARN_ON_ONCE(!irqs_disabled()); > >> + loongarch_avec_online_cpu(cpu); > >> loongson_smp_finish(); > >> > >> cpu_startup_entry(CPUHP_AP_ONLINE_IDLE); > >> diff --git a/drivers/irqchip/Makefile b/drivers/irqchip/Makefile > >> index ec4a18380998..398db4c3e264 100644 > >> --- a/drivers/irqchip/Makefile > >> +++ b/drivers/irqchip/Makefile > >> @@ -105,7 +105,7 @@ obj-$(CONFIG_LS1X_IRQ) += irq-ls1x.o > >> obj-$(CONFIG_TI_SCI_INTR_IRQCHIP) += irq-ti-sci-intr.o > >> obj-$(CONFIG_TI_SCI_INTA_IRQCHIP) += irq-ti-sci-inta.o > >> obj-$(CONFIG_TI_PRUSS_INTC) += irq-pruss-intc.o > >> -obj-$(CONFIG_IRQ_LOONGARCH_CPU) += irq-loongarch-cpu.o > >> +obj-$(CONFIG_IRQ_LOONGARCH_CPU) += irq-loongarch-cpu.o irq-loongarch-avec.o > >> obj-$(CONFIG_LOONGSON_LIOINTC) += irq-loongson-liointc.o > >> obj-$(CONFIG_LOONGSON_EIOINTC) += irq-loongson-eiointc.o > >> obj-$(CONFIG_LOONGSON_HTPIC) += irq-loongson-htpic.o > >> diff --git a/drivers/irqchip/irq-loongarch-avec.c b/drivers/irqchip/irq-loongarch-avec.c > >> new file mode 100644 > >> index 000000000000..3e488f182178 > >> --- /dev/null > >> +++ b/drivers/irqchip/irq-loongarch-avec.c > >> @@ -0,0 +1,423 @@ > >> +// SPDX-License-Identifier: GPL-2.0 > >> +/* > >> + * Copyright (C) 2020 Loongson Technologies, Inc. > > Use 2020-2024 here. > Thanks , I got it > > > >> + */ > >> + > >> +#include <linux/cpuhotplug.h> > >> +#include <linux/init.h> > >> +#include <linux/interrupt.h> > >> +#include <linux/irq.h> > >> +#include <linux/irqchip.h> > >> +#include <linux/irqchip/chained_irq.h> > >> +#include <linux/irqdomain.h> > >> +#include <linux/kernel.h> > >> +#include <linux/msi.h> > >> +#include <linux/radix-tree.h> > >> +#include <linux/spinlock.h> > >> + > >> +#include <asm/loongarch.h> > >> +#include <asm/setup.h> > >> + > >> +#define VECTORS_PER_REG 64 > >> +#define ILR_INVALID_MASK 0x80000000UL > >> +#define ILR_VECTOR_MASK 0xffUL > >> +#define AVEC_MSG_OFFSET 0x100000 > >> + > >> +static phys_addr_t msi_base_v2; > >> +static DEFINE_PER_CPU(struct irq_desc * [NR_VECTORS], irq_map); > >> + > >> +struct pending_list { > >> + struct list_head head; > >> +}; > >> + > >> +static DEFINE_PER_CPU(struct pending_list, pending_list); > >> + > >> +struct loongarch_avec_chip { > >> + struct fwnode_handle *fwnode; > >> + struct irq_domain *domain; > >> + struct irq_matrix *vector_matrix; > >> + raw_spinlock_t lock; > >> +}; > >> + > >> +static struct loongarch_avec_chip loongarch_avec; > >> + > >> +struct loongarch_avec_data { > >> + struct list_head entry; > >> + unsigned int cpu; > >> + unsigned int vec; > >> + unsigned int prev_cpu; > >> + unsigned int prev_vec; > >> + unsigned int moving : 1, > >> + managed : 1; > >> +}; > >> + > >> +static struct cpumask intersect_mask; > >> + > >> +static int assign_irq_vector(struct irq_data *irqd, const struct cpumask *dest, > >> + unsigned int *cpu) > >> +{ > >> + return irq_matrix_alloc(loongarch_avec.vector_matrix, dest, false, cpu); > >> +} > >> + > >> +static inline void loongarch_avec_ack_irq(struct irq_data *d) > >> +{ > >> +} > >> + > >> +static inline void loongarch_avec_unmask_irq(struct irq_data *d) > >> +{ > >> +} > >> + > >> +static inline void loongarch_avec_mask_irq(struct irq_data *d) > >> +{ > >> +} > >> + > >> +static void loongarch_avec_sync(struct loongarch_avec_data *adata) > >> +{ > >> + struct pending_list *plist; > >> + > >> + if (cpu_online(adata->prev_cpu)) { > >> + plist = per_cpu_ptr(&pending_list, adata->prev_cpu); > >> + list_add_tail(&adata->entry, &plist->head); > >> + adata->moving = true; > >> + loongson_send_ipi_single(adata->prev_cpu, SMP_CLEAR_VECT); > >> + } > >> + adata->prev_cpu = adata->cpu; > >> + adata->prev_vec = adata->vec; > >> +} > >> + > >> +static int loongarch_avec_set_affinity(struct irq_data *data, > >> + const struct cpumask *dest, bool force) > >> +{ > >> + struct loongarch_avec_data *adata; > >> + unsigned int cpu, vector; > >> + unsigned long flags; > >> + int ret; > >> + > >> + raw_spin_lock_irqsave(&loongarch_avec.lock, flags); > >> + adata = irq_data_get_irq_chip_data(data); > >> + > >> + if (adata->vec && cpu_online(adata->cpu) && cpumask_test_cpu(adata->cpu, dest)) { > >> + raw_spin_unlock_irqrestore(&loongarch_avec.lock, flags); > >> + return 0; > >> + } > >> + if (adata->moving) > >> + return -EBUSY; > >> + > >> + cpumask_and(&intersect_mask, dest, cpu_online_mask); > >> + > >> + ret = assign_irq_vector(data, &intersect_mask, &cpu); > >> + if (ret < 0) { > >> + raw_spin_unlock_irqrestore(&loongarch_avec.lock, flags); > >> + return ret; > >> + } > >> + vector = ret; > >> + adata->cpu = cpu; > >> + adata->vec = vector; > >> + per_cpu_ptr(irq_map, adata->cpu)[adata->vec] = irq_data_to_desc(data); > >> + loongarch_avec_sync(adata); > >> + > >> + raw_spin_unlock_irqrestore(&loongarch_avec.lock, flags); > >> + irq_data_update_effective_affinity(data, cpumask_of(cpu)); > >> + > >> + return IRQ_SET_MASK_OK; > >> +} > >> + > >> +static void loongarch_avec_compose_msg(struct irq_data *d, > >> + struct msi_msg *msg) > >> +{ > >> + struct loongarch_avec_data *avec_data; > >> + > >> + avec_data = irq_data_get_irq_chip_data(d); > >> + > >> + msg->address_hi = 0x0; > >> + msg->address_lo = msi_base_v2 | ((avec_data->vec & 0xff) << 4) | > >> + ((cpu_logical_map(avec_data->cpu & 0xffff)) << 12); > >> + msg->data = 0x0; > >> + > >> +} > >> + > >> +static struct irq_chip loongarch_avec_controller = { > >> + .name = "CORE_AVEC", > > Use AVECINTC can keep consistancy with other Loongson irqchips. > > > > Huacai > > I will modify this in the next version > > Thank you > > Tianyang > > > > >> + .irq_ack = loongarch_avec_ack_irq, > >> + .irq_mask = loongarch_avec_mask_irq, > >> + .irq_unmask = loongarch_avec_unmask_irq, > >> + .irq_set_affinity = loongarch_avec_set_affinity, > >> + .irq_compose_msi_msg = loongarch_avec_compose_msg, > >> +}; > >> + > >> +void complete_irq_moving(void) > >> +{ > >> + struct pending_list *plist = this_cpu_ptr(&pending_list); > >> + struct loongarch_avec_data *adata, *tmp; > >> + int cpu, vector, bias; > >> + u64 irr; > >> + > >> + raw_spin_lock(&loongarch_avec.lock); > >> + > >> + list_for_each_entry_safe(adata, tmp, &plist->head, entry) { > >> + cpu = adata->prev_cpu; > >> + vector = adata->prev_vec; > >> + bias = vector / VECTORS_PER_REG; > >> + switch (bias) { > >> + case 0: > >> + irr = csr_read64(LOONGARCH_CSR_IRR0); > >> + case 1: > >> + irr = csr_read64(LOONGARCH_CSR_IRR1); > >> + case 2: > >> + irr = csr_read64(LOONGARCH_CSR_IRR2); > >> + case 3: > >> + irr = csr_read64(LOONGARCH_CSR_IRR3); > >> + } > >> + > >> + if (irr & (1UL << (vector % VECTORS_PER_REG))) { > >> + loongson_send_ipi_single(cpu, SMP_CLEAR_VECT); > >> + continue; > >> + } > >> + list_del(&adata->entry); > >> + irq_matrix_free(loongarch_avec.vector_matrix, cpu, vector, adata->managed); > >> + this_cpu_write(irq_map[vector], NULL); > >> + adata->moving = 0; > >> + } > >> + raw_spin_unlock(&loongarch_avec.lock); > >> +} > >> + > >> +static void loongarch_avec_dispatch(struct irq_desc *desc) > >> +{ > >> + struct irq_chip *chip = irq_desc_get_chip(desc); > >> + struct irq_desc *d; > >> + unsigned long vector; > >> + > >> + chained_irq_enter(chip, desc); > >> + vector = csr_read64(LOONGARCH_CSR_ILR); > >> + if (vector & ILR_INVALID_MASK) > >> + return; > >> + > >> + vector &= ILR_VECTOR_MASK; > >> + > >> + d = this_cpu_read(irq_map[vector]); > >> + if (d) > >> + generic_handle_irq_desc(d); > >> + else > >> + pr_warn("IRQ ERROR:Unexpected irq occur on cpu %d[vector %ld]\n", > >> + smp_processor_id(), vector); > >> + > >> + chained_irq_exit(chip, desc); > >> +} > >> + > >> +static int loongarch_avec_alloc(struct irq_domain *domain, unsigned int virq, > >> + unsigned int nr_irqs, void *arg) > >> +{ > >> + struct loongarch_avec_data *adata; > >> + struct irq_data *irqd; > >> + unsigned int cpu, vector, i, ret; > >> + unsigned long flags; > >> + > >> + raw_spin_lock_irqsave(&loongarch_avec.lock, flags); > >> + for (i = 0; i < nr_irqs; i++) { > >> + irqd = irq_domain_get_irq_data(domain, virq + i); > >> + adata = kzalloc(sizeof(*adata), GFP_KERNEL); > >> + if (!adata) { > >> + raw_spin_unlock_irqrestore(&loongarch_avec.lock, flags); > >> + return -ENOMEM; > >> + } > >> + ret = assign_irq_vector(irqd, cpu_online_mask, &cpu); > >> + if (ret < 0) { > >> + raw_spin_unlock_irqrestore(&loongarch_avec.lock, flags); > >> + return ret; > >> + } > >> + vector = ret; > >> + adata->prev_cpu = adata->cpu = cpu; > >> + adata->prev_vec = adata->vec = vector; > >> + adata->managed = irqd_affinity_is_managed(irqd); > >> + irq_domain_set_info(domain, virq + i, virq + i, &loongarch_avec_controller, > >> + adata, handle_edge_irq, NULL, NULL); > >> + adata->moving = 0; > >> + irqd_set_single_target(irqd); > >> + irqd_set_affinity_on_activate(irqd); > >> + > >> + per_cpu_ptr(irq_map, adata->cpu)[adata->vec] = irq_data_to_desc(irqd); > >> + } > >> + raw_spin_unlock_irqrestore(&loongarch_avec.lock, flags); > >> + > >> + return 0; > >> +} > >> + > >> +static void clear_free_vector(struct irq_data *irqd) > >> +{ > >> + struct loongarch_avec_data *adata = irq_data_get_irq_chip_data(irqd); > >> + bool managed = irqd_affinity_is_managed(irqd); > >> + > >> + per_cpu(irq_map, adata->cpu)[adata->vec] = NULL; > >> + irq_matrix_free(loongarch_avec.vector_matrix, adata->cpu, adata->vec, managed); > >> + adata->cpu = 0; > >> + adata->vec = 0; > >> + if (!adata->moving) > >> + return; > >> + > >> + per_cpu(irq_map, adata->prev_cpu)[adata->prev_vec] = 0; > >> + irq_matrix_free(loongarch_avec.vector_matrix, adata->prev_cpu, > >> + adata->prev_vec, adata->managed); > >> + adata->prev_vec = 0; > >> + adata->prev_cpu = 0; > >> + adata->moving = 0; > >> + list_del_init(&adata->entry); > >> +} > >> + > >> +static void loongarch_avec_free(struct irq_domain *domain, unsigned int virq, > >> + unsigned int nr_irqs) > >> +{ > >> + struct irq_data *d; > >> + unsigned long flags; > >> + unsigned int i; > >> + > >> + raw_spin_lock_irqsave(&loongarch_avec.lock, flags); > >> + for (i = 0; i < nr_irqs; i++) { > >> + d = irq_domain_get_irq_data(domain, virq + i); > >> + if (d) { > >> + clear_free_vector(d); > >> + irq_domain_reset_irq_data(d); > >> + > >> + } > >> + } > >> + > >> + raw_spin_unlock_irqrestore(&loongarch_avec.lock, flags); > >> +} > >> + > >> +static const struct irq_domain_ops loongarch_avec_domain_ops = { > >> + .alloc = loongarch_avec_alloc, > >> + .free = loongarch_avec_free, > >> +}; > >> + > >> +static int __init irq_matrix_init(void) > >> +{ > >> + int i; > >> + > >> + loongarch_avec.vector_matrix = irq_alloc_matrix(NR_VECTORS, 0, NR_VECTORS - 1); > >> + if (!loongarch_avec.vector_matrix) > >> + return -ENOMEM; > >> + for (i = 0; i < NR_LEGACY_VECTORS; i++) > >> + irq_matrix_assign_system(loongarch_avec.vector_matrix, i, false); > >> + > >> + irq_matrix_online(loongarch_avec.vector_matrix); > >> + > >> + return 0; > >> +} > >> + > >> +static int __init loongarch_avec_init(struct irq_domain *parent) > >> +{ > >> + struct pending_list *plist = per_cpu_ptr(&pending_list, 0); > >> + int ret = 0, parent_irq; > >> + unsigned long tmp; > >> + > >> + raw_spin_lock_init(&loongarch_avec.lock); > >> + > >> + loongarch_avec.fwnode = irq_domain_alloc_named_fwnode("CORE_AVEC"); > >> + if (!loongarch_avec.fwnode) { > >> + pr_err("Unable to allocate domain handle\n"); > >> + ret = -ENOMEM; > >> + goto out; > >> + } > >> + > >> + loongarch_avec.domain = irq_domain_create_tree(loongarch_avec.fwnode, > >> + &loongarch_avec_domain_ops, NULL); > >> + if (!loongarch_avec.domain) { > >> + pr_err("core-vec: cannot create IRQ domain\n"); > >> + ret = -ENOMEM; > >> + goto out_free_handle; > >> + } > >> + > >> + parent_irq = irq_create_mapping(parent, INT_AVEC); > >> + if (!parent_irq) { > >> + pr_err("Failed to mapping hwirq\n"); > >> + ret = -EINVAL; > >> + goto out_remove_domain; > >> + } > >> + irq_set_chained_handler_and_data(parent_irq, loongarch_avec_dispatch, NULL); > >> + > >> + ret = irq_matrix_init(); > >> + if (ret) { > >> + pr_err("Failed to init irq matrix\n"); > >> + goto out_free_matrix; > >> + } > >> + > >> + INIT_LIST_HEAD(&plist->head); > >> + tmp = iocsr_read64(LOONGARCH_IOCSR_MISC_FUNC); > >> + tmp |= IOCSR_MISC_FUNC_AVEC_EN; > >> + iocsr_write64(tmp, LOONGARCH_IOCSR_MISC_FUNC); > >> + > >> + return ret; > >> + > >> +out_free_matrix: > >> + kfree(loongarch_avec.vector_matrix); > >> +out_remove_domain: > >> + irq_domain_remove(loongarch_avec.domain); > >> +out_free_handle: > >> + irq_domain_free_fwnode(loongarch_avec.fwnode); > >> +out: > >> + return ret; > >> +} > >> + > >> +int loongarch_avec_offline_cpu(unsigned int cpu) > >> +{ > >> + unsigned long flags; > >> + struct pending_list *plist = per_cpu_ptr(&pending_list, cpu); > >> + > >> + raw_spin_lock_irqsave(&loongarch_avec.lock, flags); > >> + if (list_empty(&plist->head)) { > >> + irq_matrix_offline(loongarch_avec.vector_matrix); > >> + } else { > >> + pr_warn("cpu %d advanced extioi is busy\n", cpu); > >> + raw_spin_unlock_irqrestore(&loongarch_avec.lock, flags); > >> + return -EBUSY; > >> + } > >> + raw_spin_unlock_irqrestore(&loongarch_avec.lock, flags); > >> + return 0; > >> +} > >> + > >> +int loongarch_avec_online_cpu(unsigned int cpu) > >> +{ > >> + struct pending_list *plist = per_cpu_ptr(&pending_list, cpu); > >> + unsigned long flags; > >> + > >> + raw_spin_lock_irqsave(&loongarch_avec.lock, flags); > >> + > >> + irq_matrix_online(loongarch_avec.vector_matrix); > >> + > >> + INIT_LIST_HEAD(&plist->head); > >> + > >> + raw_spin_unlock_irqrestore(&loongarch_avec.lock, flags); > >> + return 0; > >> +} > >> + > >> +static int __init pch_msi_parse_madt(union acpi_subtable_headers *header, > >> + const unsigned long end) > >> +{ > >> + struct acpi_madt_msi_pic *pchmsi_entry = (struct acpi_madt_msi_pic *)header; > >> + > >> + msi_base_v2 = pchmsi_entry->msg_address - AVEC_MSG_OFFSET; > >> + return pch_msi_acpi_init_v2(loongarch_avec.domain, pchmsi_entry); > >> +} > >> + > >> +static inline int __init acpi_cascade_irqdomain_init(void) > >> +{ > >> + return acpi_table_parse_madt(ACPI_MADT_TYPE_MSI_PIC, pch_msi_parse_madt, 1); > >> +} > >> + > >> +int __init loongarch_avec_acpi_init(struct irq_domain *parent) > >> +{ > >> + int ret = 0; > >> + > >> + ret = loongarch_avec_init(parent); > >> + if (ret) { > >> + pr_err("Failed to init irq domain\n"); > >> + return ret; > >> + } > >> + > >> + ret = acpi_cascade_irqdomain_init(); > >> + if (ret) { > >> + pr_err("Failed to cascade IRQ domain\n"); > >> + return ret; > >> + } > >> + > >> + return ret; > >> +} > >> diff --git a/drivers/irqchip/irq-loongarch-cpu.c b/drivers/irqchip/irq-loongarch-cpu.c > >> index 9d8f2c406043..1ecac59925c6 100644 > >> --- a/drivers/irqchip/irq-loongarch-cpu.c > >> +++ b/drivers/irqchip/irq-loongarch-cpu.c > >> @@ -138,7 +138,9 @@ static int __init acpi_cascade_irqdomain_init(void) > >> if (r < 0) > >> return r; > >> > >> - return 0; > >> + if (cpu_has_avecint) > >> + r = loongarch_avec_acpi_init(irq_domain); > >> + return r; > >> } > >> > >> static int __init cpuintc_acpi_init(union acpi_subtable_headers *header, > >> diff --git a/drivers/irqchip/irq-loongson-eiointc.c b/drivers/irqchip/irq-loongson-eiointc.c > >> index 405f622a26ad..39795241304e 100644 > >> --- a/drivers/irqchip/irq-loongson-eiointc.c > >> +++ b/drivers/irqchip/irq-loongson-eiointc.c > >> @@ -359,6 +359,9 @@ static int __init acpi_cascade_irqdomain_init(void) > >> if (r < 0) > >> return r; > >> > >> + if (cpu_has_avecint) > >> + return 0; > >> + > >> r = acpi_table_parse_madt(ACPI_MADT_TYPE_MSI_PIC, pch_msi_parse_madt, 1); > >> if (r < 0) > >> return r; > >> diff --git a/drivers/irqchip/irq-loongson-pch-msi.c b/drivers/irqchip/irq-loongson-pch-msi.c > >> index 6e1e1f011bb2..af5f0beb7be7 100644 > >> --- a/drivers/irqchip/irq-loongson-pch-msi.c > >> +++ b/drivers/irqchip/irq-loongson-pch-msi.c > >> @@ -16,7 +16,6 @@ > >> #include <linux/slab.h> > >> > >> static int nr_pics; > >> - > >> struct pch_msi_data { > >> struct mutex msi_map_lock; > >> phys_addr_t doorbell; > >> @@ -100,6 +99,17 @@ static struct irq_chip middle_irq_chip = { > >> .irq_compose_msi_msg = pch_msi_compose_msi_msg, > >> }; > >> > >> +static struct irq_chip pch_msi_irq_chip_v2 = { > >> + .name = "MSI", > >> + .irq_ack = irq_chip_ack_parent, > >> +}; > >> + > >> +static struct msi_domain_info pch_msi_domain_info_v2 = { > >> + .flags = MSI_FLAG_USE_DEF_DOM_OPS | MSI_FLAG_USE_DEF_CHIP_OPS | > >> + MSI_FLAG_MULTI_PCI_MSI | MSI_FLAG_PCI_MSIX, > >> + .chip = &pch_msi_irq_chip_v2, > >> +}; > >> + > >> static int pch_msi_parent_domain_alloc(struct irq_domain *domain, > >> unsigned int virq, int hwirq) > >> { > >> @@ -268,6 +278,9 @@ struct fwnode_handle *get_pch_msi_handle(int pci_segment) > >> { > >> int i; > >> > >> + if (cpu_has_avecint) > >> + return pch_msi_handle[0]; > >> + > >> for (i = 0; i < MAX_IO_PICS; i++) { > >> if (msi_group[i].pci_segment == pci_segment) > >> return pch_msi_handle[i]; > >> @@ -289,4 +302,32 @@ int __init pch_msi_acpi_init(struct irq_domain *parent, > >> > >> return ret; > >> } > >> + > >> +int __init pch_msi_acpi_init_v2(struct irq_domain *parent, > >> + struct acpi_madt_msi_pic *msi_entry) > >> +{ > >> + struct irq_domain *msi_domain; > >> + > >> + if (pch_msi_handle[0]) > >> + return 0; > >> + > >> + pch_msi_handle[0] = irq_domain_alloc_named_fwnode("msipic-v2"); > >> + if (!pch_msi_handle[0]) { > >> + pr_err("Unable to allocate domain handle\n"); > >> + kfree(pch_msi_handle[0]); > >> + return -ENOMEM; > >> + } > >> + > >> + msi_domain = pci_msi_create_irq_domain(pch_msi_handle[0], > >> + &pch_msi_domain_info_v2, > >> + parent); > >> + if (!msi_domain) { > >> + pr_err("Failed to create PCI MSI domain\n"); > >> + kfree(pch_msi_handle[0]); > >> + return -ENOMEM; > >> + } > >> + > >> + pr_info("IRQ domain MSIPIC-V2 init done.\n"); > >> + return 0; > >> +} > >> #endif > >> -- > >> 2.20.1 > >> > >
