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
  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_DOMAIN */
  40
  41 #endif