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