LXR linux/include/asm-generic/msi.h

   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_DOMAIN
   8
   9#ifndef NUM_MSI_ALLOC_SCRATCHPAD_REGS
  10# define NUM_MSI_ALLOC_SCRATCHPAD_REGS  2
  11#endif
  12
  13struct 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 */
  24typedef 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_DOMAIN */
  40
  41#endif
  42