| /* SPDX-License-Identifier: GPL-2.0-or-later */ |
| |
| #ifndef SOC_INTEL_COMMON_IRQ_H |
| #define SOC_INTEL_COMMON_IRQ_H |
| |
| #include <southbridge/intel/common/acpi_pirq_gen.h> |
| #include <types.h> |
| |
| #define MAX_FNS 8 |
| #define INVALID_IRQ -1 |
| |
| #define ANY_PIRQ(x) [PCI_FUNC(x)] = { .fixed_int_pin = PCI_INT_NONE,\ |
| .fixed_pirq = PIRQ_INVALID, \ |
| .irq_route = IRQ_PIRQ, } |
| #define DIRECT_IRQ(x) [PCI_FUNC(x)] = { .fixed_int_pin = PCI_INT_NONE,\ |
| .fixed_pirq = PIRQ_INVALID, \ |
| .irq_route = IRQ_DIRECT,} |
| #define FIXED_INT_ANY_PIRQ(x, pin) [PCI_FUNC(x)] = { .fixed_int_pin = pin, \ |
| .fixed_pirq = PIRQ_INVALID, \ |
| .irq_route = IRQ_PIRQ,} |
| #define FIXED_INT_PIRQ(x, pin, pirq) [PCI_FUNC(x)] = { .fixed_int_pin = pin, \ |
| .fixed_pirq = pirq, \ |
| .irq_route = IRQ_PIRQ,} |
| |
| struct slot_irq_constraints { |
| unsigned int slot; |
| struct { |
| enum pci_pin fixed_int_pin; |
| enum pirq fixed_pirq; |
| enum { |
| IRQ_NONE = 0, /* Empty function */ |
| IRQ_PIRQ = 1, /* PIRQ routing, i.e. IRQs 16 - 23 */ |
| IRQ_DIRECT = 2, /* No PIRQ routing, i.e., IRQs > 23 */ |
| } irq_route; |
| } fns[MAX_FNS]; |
| }; |
| |
| struct pci_irq_entry { |
| unsigned int devfn; |
| enum pci_pin pin; |
| unsigned int irq; |
| struct pci_irq_entry *next; |
| }; |
| |
| /* |
| * This functions applies rules from FSP, BWG and SoC to come up with a set of |
| * PCI slot/function --> IRQ pin/IRQ number entries. |
| * |
| * The results of this calculation are cached within this module for usage |
| * by the other API functions. |
| */ |
| bool assign_pci_irqs(const struct slot_irq_constraints *constraints, size_t num_slots); |
| |
| /* Generate an ACPI PCI IRQ routing table (_PRT) in the \_SB.PCI0 scope, using |
| the cached results. */ |
| bool generate_pin_irq_map(void); |
| |
| /* Typically the FSP can accept a list of the mappings provided above, and |
| program them, but for PCH devices only. This function provides the same |
| function for non-PCH devices. */ |
| bool irq_program_non_pch(void); |
| |
| const struct pci_irq_entry *get_cached_pci_irqs(void); |
| |
| /* Search the cached PCI IRQ assignment results for the matching devfn and |
| return the corresponding IRQ, or INVALID_IRQ if not found. */ |
| int get_pci_devfn_irq(unsigned int devfn); |
| |
| /* Check if a given slot is a PCH slot. |
| * Note: For PCH less SoC platforms, like MeteorLake and onwards, this function |
| * can be utilized to check if a slot belongs to the SoC or IOE die. |
| */ |
| bool is_pch_slot(unsigned int devfn); |
| |
| #endif /* SOC_INTEL_COMMON_IRQ_H */ |