1 /* SPDX-License-Identifier: GPL-2.0 */ 2 #ifndef _ASM_X86_MSI_H 3 #define _ASM_X86_MSI_H 4 #include <asm/hw_irq.h> 5 #include <asm/irqdomain.h> 6 7 typedef struct irq_alloc_info msi_alloc_info_t; 8 9 int pci_msi_prepare(struct irq_domain *domain, struct device *dev, int nvec, 10 msi_alloc_info_t *arg); 11 12 /* Structs and defines for the X86 specific MSI message format */ 13 14 typedef struct x86_msi_data { 15 union { 16 struct { 17 u32 vector : 8, 18 delivery_mode : 3, 19 dest_mode_logical : 1, 20 reserved : 2, 21 active_low : 1, 22 is_level : 1; 23 }; 24 u32 dmar_subhandle; 25 }; 26 } __attribute__ ((packed)) arch_msi_msg_data_t; 27 #define arch_msi_msg_data x86_msi_data 28 29 typedef struct x86_msi_addr_lo { 30 union { 31 struct { 32 u32 reserved_0 : 2, 33 dest_mode_logical : 1, 34 redirect_hint : 1, 35 reserved_1 : 1, 36 virt_destid_8_14 : 7, 37 destid_0_7 : 8, 38 base_address : 12; 39 }; 40 struct { 41 u32 dmar_reserved_0 : 2, 42 dmar_index_15 : 1, 43 dmar_subhandle_valid : 1, 44 dmar_format : 1, 45 dmar_index_0_14 : 15, 46 dmar_base_address : 12; 47 }; 48 }; 49 } __attribute__ ((packed)) arch_msi_msg_addr_lo_t; 50 #define arch_msi_msg_addr_lo x86_msi_addr_lo 51 52 #define X86_MSI_BASE_ADDRESS_LOW (0xfee00000 >> 20) 53 54 typedef struct x86_msi_addr_hi { 55 u32 reserved : 8, 56 destid_8_31 : 24; 57 } __attribute__ ((packed)) arch_msi_msg_addr_hi_t; 58 #define arch_msi_msg_addr_hi x86_msi_addr_hi 59 60 #define X86_MSI_BASE_ADDRESS_HIGH (0) 61 62 struct msi_msg; 63 u32 x86_msi_msg_get_destid(struct msi_msg *msg, bool extid); 64 65 #endif /* _ASM_X86_MSI_H */ 66