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