1 /* SPDX-License-Identifier: GPL-2.0 */
2 #ifndef __ASM_GENERIC_MSI_H
3 #define __ASM_GENERIC_MSI_H
4 
5 #include <linux/types.h>
6 
7 #ifndef NUM_MSI_ALLOC_SCRATCHPAD_REGS
8 # define NUM_MSI_ALLOC_SCRATCHPAD_REGS	2
9 #endif
10 
11 struct msi_desc;
12 
13 /**
14  * struct msi_alloc_info - Default structure for MSI interrupt allocation.
15  * @desc:	Pointer to msi descriptor
16  * @hwirq:	Associated hw interrupt number in the domain
17  * @scratchpad:	Storage for implementation specific scratch data
18  *
19  * Architectures can provide their own implementation by not including
20  * asm-generic/msi.h into their arch specific header file.
21  */
22 typedef struct msi_alloc_info {
23 	struct msi_desc			*desc;
24 	irq_hw_number_t			hwirq;
25 	union {
26 		unsigned long		ul;
27 		void			*ptr;
28 	} scratchpad[NUM_MSI_ALLOC_SCRATCHPAD_REGS];
29 } msi_alloc_info_t;
30 
31 #define GENERIC_MSI_DOMAIN_OPS		1
32 
33 #endif
34