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
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