Messages in this thread Patch in this message |  | | From | Jianmin Lv <> | Subject | [PATCH V14 11/15] LoongArch: prepare to support multiple pch-pic and pch-msi irqdomain | Date | Sun, 3 Jul 2022 16:45:28 +0800 |
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For systems with two chipsets, there are two related pch-pic and pch-msi irqdomains, each of which has the same node id as its parent irqdomain. So we use a structure to mantain the relation of node and it's parent irqdomain as pch irqdomin, the 'pci_segment' field is only used to match the pci segment of a pci device when setting msi irqdomain for the device.
struct acpi_vector_group { int node; int pci_segment; struct irq_domain *parent; };
The field 'pci_segment' and 'node' are initialized from MCFG, and the parent irqdomain driver will set field 'parent' by matching same 'node'.
Signed-off-by: Jianmin Lv <lvjianmin@loongson.cn> --- arch/loongarch/include/asm/irq.h | 8 ++++++++ arch/loongarch/kernel/irq.c | 38 ++++++++++++++++++++++++++++++++++++++ 2 files changed, 46 insertions(+)
diff --git a/arch/loongarch/include/asm/irq.h b/arch/loongarch/include/asm/irq.h index b4c7956..a07315a 100644 --- a/arch/loongarch/include/asm/irq.h +++ b/arch/loongarch/include/asm/irq.h @@ -48,6 +48,14 @@ static inline bool on_irq_stack(int cpu, unsigned long sp) #define MAX_IO_PICS 2 #define NR_IRQS (64 + (256 * MAX_IO_PICS)) +struct acpi_vector_group { + int node; + int pci_segment; + struct irq_domain *parent; +}; +extern struct acpi_vector_group pch_group[MAX_IO_PICS]; +extern struct acpi_vector_group msi_group[MAX_IO_PICS]; + #define CORES_PER_EIO_NODE 4 #define LOONGSON_CPU_UART0_VEC 10 /* CPU UART0 */ diff --git a/arch/loongarch/kernel/irq.c b/arch/loongarch/kernel/irq.c index b04201c..06f2a15 100644 --- a/arch/loongarch/kernel/irq.c +++ b/arch/loongarch/kernel/irq.c @@ -26,6 +26,8 @@ EXPORT_PER_CPU_SYMBOL(irq_stat); struct irq_domain *cpu_domain; +struct acpi_vector_group pch_group[MAX_IO_PICS]; +struct acpi_vector_group msi_group[MAX_IO_PICS]; /* * 'what should we do if we get a hw irq event on an illegal vector'. @@ -52,6 +54,41 @@ int arch_show_interrupts(struct seq_file *p, int prec) return 0; } +static int __init early_pci_mcfg_parse(struct acpi_table_header *header) +{ + struct acpi_table_mcfg *mcfg; + struct acpi_mcfg_allocation *mptr; + int i, n; + + if (header->length < sizeof(struct acpi_table_mcfg)) + return -EINVAL; + + n = (header->length - sizeof(struct acpi_table_mcfg)) / + sizeof(struct acpi_mcfg_allocation); + mcfg = (struct acpi_table_mcfg *)header; + mptr = (struct acpi_mcfg_allocation *) &mcfg[1]; + + for (i = 0; i < n; i++, mptr++) { + msi_group[i].pci_segment = mptr->pci_segment; + pch_group[i].node = msi_group[i].node = (mptr->address >> 44) & 0xf; + } + + return 0; +} + +static void __init init_vec_parent_group(void) +{ + int i; + + for (i = 0; i < MAX_IO_PICS; i++) { + msi_group[i].pci_segment = -1; + msi_group[i].node = -1; + pch_group[i].node = -1; + } + + acpi_table_parse(ACPI_SIG_MCFG, early_pci_mcfg_parse); +} + void __init init_IRQ(void) { int i; @@ -65,6 +102,7 @@ void __init init_IRQ(void) clear_csr_ecfg(ECFG0_IM); clear_csr_estat(ESTATF_IP); + init_vec_parent_group(); irqchip_init(); #ifdef CONFIG_SMP ipi_irq = EXCCODE_IPI - EXCCODE_INT_START; -- 1.8.3.1
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