diff options
| -rw-r--r-- | arch/riscv/include/asm/irq.h | 5 | ||||
| -rw-r--r-- | drivers/acpi/riscv/irq.c | 38 |
2 files changed, 41 insertions, 2 deletions
diff --git a/arch/riscv/include/asm/irq.h b/arch/riscv/include/asm/irq.h index 59c975f750c9..7ec592fe430a 100644 --- a/arch/riscv/include/asm/irq.h +++ b/arch/riscv/include/asm/irq.h @@ -42,6 +42,7 @@ unsigned long acpi_rintc_ext_parent_to_hartid(unsigned int plic_id, unsigned int unsigned int acpi_rintc_get_plic_nr_contexts(unsigned int plic_id); unsigned int acpi_rintc_get_plic_context(unsigned int plic_id, unsigned int ctxt_idx); int __init acpi_rintc_get_imsic_mmio_info(u32 index, struct resource *res); +int riscv_acpi_update_gsi_range(u32 gsi_base, u32 nr_irqs); #else static inline int riscv_acpi_get_gsi_info(struct fwnode_handle *fwnode, u32 *gsi_base, @@ -76,6 +77,10 @@ static inline int __init acpi_rintc_get_imsic_mmio_info(u32 index, struct resour return 0; } +static inline int riscv_acpi_update_gsi_range(u32 gsi_base, u32 nr_irqs) +{ + return -ENODEV; +} #endif /* CONFIG_ACPI */ #endif /* _ASM_RISCV_IRQ_H */ diff --git a/drivers/acpi/riscv/irq.c b/drivers/acpi/riscv/irq.c index 33c073e2e71d..cc1928422418 100644 --- a/drivers/acpi/riscv/irq.c +++ b/drivers/acpi/riscv/irq.c @@ -10,6 +10,8 @@ #include "init.h" +#define RISCV_ACPI_INTC_FLAG_PENDING BIT(0) + struct riscv_ext_intc_list { acpi_handle handle; u32 gsi_base; @@ -17,6 +19,7 @@ struct riscv_ext_intc_list { u32 nr_idcs; u32 id; u32 type; + u32 flag; struct list_head list; }; @@ -69,6 +72,22 @@ static acpi_status riscv_acpi_update_gsi_handle(u32 gsi_base, acpi_handle handle return AE_NOT_FOUND; } +int riscv_acpi_update_gsi_range(u32 gsi_base, u32 nr_irqs) +{ + struct riscv_ext_intc_list *ext_intc_element; + + list_for_each_entry(ext_intc_element, &ext_intc_list, list) { + if (gsi_base == ext_intc_element->gsi_base && + (ext_intc_element->flag & RISCV_ACPI_INTC_FLAG_PENDING)) { + ext_intc_element->nr_irqs = nr_irqs; + ext_intc_element->flag &= ~RISCV_ACPI_INTC_FLAG_PENDING; + return 0; + } + } + + return -ENODEV; +} + int riscv_acpi_get_gsi_info(struct fwnode_handle *fwnode, u32 *gsi_base, u32 *id, u32 *nr_irqs, u32 *nr_idcs) { @@ -115,14 +134,22 @@ struct fwnode_handle *riscv_acpi_get_gsi_domain_id(u32 gsi) static int __init riscv_acpi_register_ext_intc(u32 gsi_base, u32 nr_irqs, u32 nr_idcs, u32 id, u32 type) { - struct riscv_ext_intc_list *ext_intc_element, *node; + struct riscv_ext_intc_list *ext_intc_element, *node, *prev; ext_intc_element = kzalloc(sizeof(*ext_intc_element), GFP_KERNEL); if (!ext_intc_element) return -ENOMEM; ext_intc_element->gsi_base = gsi_base; - ext_intc_element->nr_irqs = nr_irqs; + + /* If nr_irqs is zero, indicate it in flag and set to max range possible */ + if (nr_irqs) { + ext_intc_element->nr_irqs = nr_irqs; + } else { + ext_intc_element->flag |= RISCV_ACPI_INTC_FLAG_PENDING; + ext_intc_element->nr_irqs = U32_MAX - ext_intc_element->gsi_base; + } + ext_intc_element->nr_idcs = nr_idcs; ext_intc_element->id = id; list_for_each_entry(node, &ext_intc_list, list) { @@ -130,6 +157,13 @@ static int __init riscv_acpi_register_ext_intc(u32 gsi_base, u32 nr_irqs, u32 nr break; } + /* Adjust the previous node's GSI range if that has pending registration */ + prev = list_prev_entry(node, list); + if (!list_entry_is_head(prev, &ext_intc_list, list)) { + if (prev->flag & RISCV_ACPI_INTC_FLAG_PENDING) + prev->nr_irqs = ext_intc_element->gsi_base - prev->gsi_base; + } + list_add_tail(&ext_intc_element->list, &node->list); return 0; } |