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#ifdef CONFIG_GENERIC_MSI_IRQ
 8
 9#ifndef NUM_MSI_ALLOC_SCRATCHPAD_REGS
10# define NUM_MSI_ALLOC_SCRATCHPAD_REGS	2
11#endif
12
13struct msi_desc;
14
15/**
16 * struct msi_alloc_info - Default structure for MSI interrupt allocation.
17 * @desc:	Pointer to msi descriptor
18 * @hwirq:	Associated hw interrupt number in the domain
19 * @scratchpad:	Storage for implementation specific scratch data
20 *
21 * Architectures can provide their own implementation by not including
22 * asm-generic/msi.h into their arch specific header file.
23 */
24typedef struct msi_alloc_info {
25	struct msi_desc			*desc;
26	irq_hw_number_t			hwirq;
27	unsigned long			flags;
28	union {
29		unsigned long		ul;
30		void			*ptr;
31	} scratchpad[NUM_MSI_ALLOC_SCRATCHPAD_REGS];
32} msi_alloc_info_t;
33
34/* Device generating MSIs is proxying for another device */
35#define MSI_ALLOC_FLAGS_PROXY_DEVICE	(1UL << 0)
36
37#define GENERIC_MSI_DOMAIN_OPS		1
38
39#endif /* CONFIG_GENERIC_MSI_IRQ */
40
41#endif