| /* SPDX-License-Identifier: GPL-2.0-only */ |
| |
| #ifndef AMD_BLOCK_PCI_UTIL_H |
| #define AMD_BLOCK_PCI_UTIL_H |
| |
| #include <types.h> |
| #include <soc/amd_pci_int_defs.h> |
| #include <device/device.h> |
| |
| /* FCH index/data registers */ |
| #define PCI_INTR_INDEX 0xc00 |
| #define PCI_INTR_DATA 0xc01 |
| |
| #define FCH_IRQ_ROUTING_ENTRIES 0x80 |
| |
| struct fch_irq_routing { |
| uint8_t intr_index; |
| uint8_t pic_irq_num; |
| uint8_t apic_irq_num; |
| }; |
| |
| const struct fch_irq_routing *mb_get_fch_irq_mapping(size_t *length); |
| |
| struct pirq_struct { |
| u8 devfn; |
| u8 PIN[4]; /* PINA/B/C/D are index 0/1/2/3 */ |
| }; |
| |
| struct irq_idx_name { |
| uint8_t index; |
| const char *const name; |
| }; |
| |
| extern const struct pirq_struct *pirq_data_ptr; |
| extern u32 pirq_data_size; |
| |
| u8 read_pci_int_idx(u8 index, int mode); |
| void write_pci_int_idx(u8 index, int mode, u8 data); |
| void write_pci_cfg_irqs(void); |
| void write_pci_int_table(void); |
| const struct irq_idx_name *sb_get_apic_reg_association(size_t *size); |
| |
| enum pci_routing_swizzle { |
| PCI_SWIZZLE_ABCD = 0, |
| PCI_SWIZZLE_BCDA, |
| PCI_SWIZZLE_CDAB, |
| PCI_SWIZZLE_DABC, |
| }; |
| |
| /** |
| * Each PCI bridge has its INTx lines routed to one of the GNB IO-APIC PCI |
| * groups. Each group has 4 interrupts. The INTx lines can be swizzled before |
| * being routed to the IO-APIC. If the IO-APIC redirection entry is masked, the |
| * interrupt is reduced modulo 8 onto INT[A-H] and forwarded to the FCH IO-APIC. |
| **/ |
| struct pci_routing_info { |
| uint8_t devfn; |
| uint8_t group; |
| uint8_t swizzle; |
| uint8_t irq; |
| } __packed; |
| |
| void populate_pirq_data(void); |
| |
| /* Implemented by the SoC */ |
| const struct pci_routing_info *get_pci_routing_table(size_t *entries); |
| |
| const struct pci_routing_info *get_pci_routing_info(unsigned int devfn); |
| |
| unsigned int pci_calculate_irq(const struct pci_routing_info *routing_info, unsigned int pin); |
| |
| void acpigen_write_pci_GNB_PRT(const struct device *dev); |
| void acpigen_write_pci_FCH_PRT(const struct device *dev); |
| |
| #endif /* AMD_BLOCK_PCI_UTIL_H */ |