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 | |
13 | struct 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 | */ |
24 | typedef 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 |
42 | |