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