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

   1#ifndef __ASM_GENERIC_MSI_H
   2#define __ASM_GENERIC_MSI_H
   3
   4#include <linux/types.h>
   5
   6#ifndef NUM_MSI_ALLOC_SCRATCHPAD_REGS
   7# define NUM_MSI_ALLOC_SCRATCHPAD_REGS  2
   8#endif
   9
  10struct msi_desc;
  11
  12/**
  13 * struct msi_alloc_info - Default structure for MSI interrupt allocation.
  14 * @desc:       Pointer to msi descriptor
  15 * @hwirq:      Associated hw interrupt number in the domain
  16 * @scratchpad: Storage for implementation specific scratch data
  17 *
  18 * Architectures can provide their own implementation by not including
  19 * asm-generic/msi.h into their arch specific header file.
  20 */
  21typedef struct msi_alloc_info {
  22        struct msi_desc                 *desc;
  23        irq_hw_number_t                 hwirq;
  24        union {
  25                unsigned long           ul;
  26                void                    *ptr;
  27        } scratchpad[NUM_MSI_ALLOC_SCRATCHPAD_REGS];
  28} msi_alloc_info_t;
  29
  30#define GENERIC_MSI_DOMAIN_OPS          1
  31
  32#endif
  33