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 #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