| 1 | /* SPDX-License-Identifier: GPL-2.0 */ |
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| 2 | #ifndef __ASM_GENERIC_MSI_H |
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| 3 | #define __ASM_GENERIC_MSI_H |
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| 4 | |
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| 5 | #include <linux/types.h> |
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| 6 | |
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| 7 | #ifdef CONFIG_GENERIC_MSI_IRQ |
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| 8 | |
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| 9 | #ifndef NUM_MSI_ALLOC_SCRATCHPAD_REGS |
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| 10 | # define NUM_MSI_ALLOC_SCRATCHPAD_REGS 2 |
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| 11 | #endif |
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| 12 | |
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| 13 | struct msi_desc; |
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| 14 | |
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| 15 | /** |
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| 16 | * struct msi_alloc_info - Default structure for MSI interrupt allocation. |
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| 17 | * @desc: Pointer to msi descriptor |
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| 18 | * @hwirq: Associated hw interrupt number in the domain |
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| 19 | * @scratchpad: Storage for implementation specific scratch data |
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| 20 | * |
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| 21 | * Architectures can provide their own implementation by not including |
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| 22 | * asm-generic/msi.h into their arch specific header file. |
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| 23 | */ |
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| 24 | typedef struct msi_alloc_info { |
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| 25 | struct msi_desc *desc; |
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| 26 | irq_hw_number_t hwirq; |
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| 27 | unsigned long flags; |
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| 28 | union { |
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| 29 | unsigned long ul; |
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| 30 | void *ptr; |
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| 31 | } scratchpad[NUM_MSI_ALLOC_SCRATCHPAD_REGS]; |
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| 32 | } msi_alloc_info_t; |
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| 33 | |
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| 34 | /* Device generating MSIs is proxying for another device */ |
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| 35 | #define MSI_ALLOC_FLAGS_PROXY_DEVICE (1UL << 0) |
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| 36 | |
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| 37 | #define GENERIC_MSI_DOMAIN_OPS 1 |
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| 38 | |
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| 39 | #endif /* CONFIG_GENERIC_MSI_IRQ */ |
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| 40 | |
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| 41 | #endif |
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| 42 | |
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