Messages in this thread | | | From | Huacai Chen <> | Date | Tue, 19 Jul 2022 10:25:02 +0800 | Subject | Re: [PATCH V16 14/14] irqchip / ACPI: Introduce ACPI_IRQ_MODEL_LPIC for LoongArch |
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Hi, Jianmin,
On Mon, Jul 18, 2022 at 10:21 PM Jianmin Lv <lvjianmin@loongson.cn> wrote: > > For LoongArch, ACPI_IRQ_MODEL_LPIC is introduced, and then the > callback acpi_get_gsi_domain_id and acpi_gsi_to_irq_fallback are > implemented. > > The acpi_get_gsi_domain_id callback returns related fwnode handle > of irqdomain for different GSI range. > > The acpi_gsi_to_irq_fallback will create new mapping for gsi when > the mapping of it is not found. > > Signed-off-by: Jianmin Lv <lvjianmin@loongson.cn> > --- > drivers/acpi/bus.c | 3 +++ > drivers/irqchip/irq-loongarch-cpu.c | 38 +++++++++++++++++++++++++++++++++++++ > include/linux/acpi.h | 1 + > 3 files changed, 42 insertions(+) > > diff --git a/drivers/acpi/bus.c b/drivers/acpi/bus.c > index 86fa61a..63fbf00 100644 > --- a/drivers/acpi/bus.c > +++ b/drivers/acpi/bus.c > @@ -1145,6 +1145,9 @@ static int __init acpi_bus_init_irq(void) > case ACPI_IRQ_MODEL_PLATFORM: > message = "platform specific model"; > break; > + case ACPI_IRQ_MODEL_LPIC: > + message = "LPIC"; > + break; > default: > pr_info("Unknown interrupt routing model\n"); > return -ENODEV; > diff --git a/drivers/irqchip/irq-loongarch-cpu.c b/drivers/irqchip/irq-loongarch-cpu.c > index b4db430..a5e0bf0 100644 > --- a/drivers/irqchip/irq-loongarch-cpu.c > +++ b/drivers/irqchip/irq-loongarch-cpu.c > @@ -16,6 +16,42 @@ > static struct irq_domain *irq_domain; > struct fwnode_handle *cpuintc_handle; > > +static u32 lpic_gsi_to_irq(u32 gsi) > +{ > + /* Only pch irqdomain transferring is required for LoongArch. */ > + if (gsi >= GSI_MIN_PCH_IRQ && gsi <= GSI_MAX_PCH_IRQ) > + return acpi_register_gsi(NULL, gsi, ACPI_LEVEL_SENSITIVE, ACPI_ACTIVE_HIGH); > + > + return 0; > +} > + > +static struct fwnode_handle *lpic_get_gsi_domain_id(u32 gsi) > +{ > + int id; > + struct fwnode_handle *domain_handle = NULL; > + > + switch (gsi) { > + case GSI_MIN_CPU_IRQ ... GSI_MAX_CPU_IRQ: > + if (liointc_handle) > + domain_handle = liointc_handle; > + break; > + > + case GSI_MIN_LPC_IRQ ... GSI_MAX_LPC_IRQ: > + if (pch_lpc_handle) > + domain_handle = pch_lpc_handle; > + break; > + > + case GSI_MIN_PCH_IRQ ... GSI_MAX_PCH_IRQ: > + id = find_pch_pic(gsi); > + if (id >= 0 && pch_pic_handle[id]) > + domain_handle = pch_pic_handle[id]; > + Remove this blank line, please.
Huacai > + break; > + } > + > + return domain_handle; > +} > + > static void mask_loongarch_irq(struct irq_data *d) > { > clear_csr_ecfg(ECFGF(d->hwirq)); > @@ -102,6 +138,8 @@ static int __init cpuintc_acpi_init_v1(union acpi_subtable_headers *header, > panic("Failed to add irqdomain for LoongArch CPU"); > > set_handle_irq(&handle_cpu_irq); > + acpi_set_irq_model(ACPI_IRQ_MODEL_LPIC, lpic_get_gsi_domain_id); > + acpi_set_gsi_to_irq_fallback(lpic_gsi_to_irq); > acpi_cascade_irqdomain_init(); > > return 0; > diff --git a/include/linux/acpi.h b/include/linux/acpi.h > index e2b60d5..76520f3 100644 > --- a/include/linux/acpi.h > +++ b/include/linux/acpi.h > @@ -105,6 +105,7 @@ enum acpi_irq_model_id { > ACPI_IRQ_MODEL_IOSAPIC, > ACPI_IRQ_MODEL_PLATFORM, > ACPI_IRQ_MODEL_GIC, > + ACPI_IRQ_MODEL_LPIC, > ACPI_IRQ_MODEL_COUNT > }; > > -- > 1.8.3.1 > >
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