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 u32 vector : 8, 16 delivery_mode : 3, 17 dest_mode_logical : 1, 18 reserved : 2, 19 active_low : 1, 20 is_level : 1; 21 22 u32 dmar_subhandle; 23 } __attribute__ ((packed)) arch_msi_msg_data_t; 24 #define arch_msi_msg_data x86_msi_data 25 26 typedef struct x86_msi_addr_lo { 27 union { 28 struct { 29 u32 reserved_0 : 2, 30 dest_mode_logical : 1, 31 redirect_hint : 1, 32 reserved_1 : 1, 33 virt_destid_8_14 : 7, 34 destid_0_7 : 8, 35 base_address : 12; 36 }; 37 struct { 38 u32 dmar_reserved_0 : 2, 39 dmar_index_15 : 1, 40 dmar_subhandle_valid : 1, 41 dmar_format : 1, 42 dmar_index_0_14 : 15, 43 dmar_base_address : 12; 44 }; 45 }; 46 } __attribute__ ((packed)) arch_msi_msg_addr_lo_t; 47 #define arch_msi_msg_addr_lo x86_msi_addr_lo 48 49 #define X86_MSI_BASE_ADDRESS_LOW (0xfee00000 >> 20) 50 51 typedef struct x86_msi_addr_hi { 52 u32 reserved : 8, 53 destid_8_31 : 24; 54 } __attribute__ ((packed)) arch_msi_msg_addr_hi_t; 55 #define arch_msi_msg_addr_hi x86_msi_addr_hi 56 57 #define X86_MSI_BASE_ADDRESS_HIGH (0) 58 59 struct msi_msg; 60 u32 x86_msi_msg_get_destid(struct msi_msg *msg, bool extid); 61 62 #endif /* _ASM_X86_MSI_H */ 63