arch/powerpc/include/asm/msi_bitmap.h

   1 /* SPDX-License-Identifier: GPL-2.0-only */
   2 #ifndef _POWERPC_SYSDEV_MSI_BITMAP_H
   3 #define _POWERPC_SYSDEV_MSI_BITMAP_H
   4
   5 /*
   6  * Copyright 2008, Michael Ellerman, IBM Corporation.
   7  */
   8
   9 #include <linux/of.h>
  10 #include <asm/irq.h>
  11
  12 struct msi_bitmap {
  13         struct device_node      *of_node;
  14         unsigned long           *bitmap;
  15         spinlock_t              lock;
  16         unsigned int            irq_count;
  17         bool                    bitmap_from_slab;
  18 };
  19
  20 int msi_bitmap_alloc_hwirqs(struct msi_bitmap *bmp, int num);
  21 void msi_bitmap_free_hwirqs(struct msi_bitmap *bmp, unsigned int offset,
  22                             unsigned int num);
  23 void msi_bitmap_reserve_hwirq(struct msi_bitmap *bmp, unsigned int hwirq);
  24
  25 int msi_bitmap_reserve_dt_hwirqs(struct msi_bitmap *bmp);
  26
  27 int msi_bitmap_alloc(struct msi_bitmap *bmp, unsigned int irq_count,
  28                      struct device_node *of_node);
  29 void msi_bitmap_free(struct msi_bitmap *bmp);
  30
  31 #endif /* _POWERPC_SYSDEV_MSI_BITMAP_H */