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| author | Jianmin Lv <lvjianmin@loongson.cn> | 2022-07-20 18:51:32 +0800 |
|---|---|---|
| committer | Marc Zyngier <maz@kernel.org> | 2022-07-20 12:09:21 +0100 |
| commit | e8bba72b396cef7c919c73710f3c5884521adb4e (patch) | |
| tree | 9df009802cadfbd9c7e365f3d959eb951a44e25f /drivers/irqchip | |
| parent | b2d3e3354e2a0d0e912308618ea33d0337f405c3 (diff) | |
| download | linux-e8bba72b396cef7c919c73710f3c5884521adb4e.tar.bz2 | |
irqchip / ACPI: Introduce ACPI_IRQ_MODEL_LPIC for LoongArch
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>
Signed-off-by: Marc Zyngier <maz@kernel.org>
Link: https://lore.kernel.org/r/1658314292-35346-14-git-send-email-lvjianmin@loongson.cn
Diffstat (limited to 'drivers/irqchip')
| -rw-r--r-- | drivers/irqchip/irq-loongarch-cpu.c | 37 |
1 files changed, 37 insertions, 0 deletions
diff --git a/drivers/irqchip/irq-loongarch-cpu.c b/drivers/irqchip/irq-loongarch-cpu.c index 28ddc60c8608..327f3ab62c03 100644 --- a/drivers/irqchip/irq-loongarch-cpu.c +++ b/drivers/irqchip/irq-loongarch-cpu.c @@ -16,6 +16,41 @@ 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]; + break; + } + + return domain_handle; +} + static void mask_loongarch_irq(struct irq_data *d) { clear_csr_ecfg(ECFGF(d->hwirq)); @@ -102,6 +137,8 @@ static int __init cpuintc_acpi_init(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; |