arch/powerpc/include/asm/msi_bitmap.h

   1 #ifndef _POWERPC_SYSDEV_MSI_BITMAP_H
   2 #define _POWERPC_SYSDEV_MSI_BITMAP_H
   3
   4 /*
   5  * Copyright 2008, Michael Ellerman, IBM Corporation.
   6  *
   7  * This program is free software; you can redistribute it and/or
   8  * modify it under the terms of the GNU General Public License
   9  * as published by the Free Software Foundation; version 2 of the
  10  * License.
  11  *
  12  */
  13
  14 #include <linux/of.h>
  15 #include <asm/irq.h>
  16
  17 struct msi_bitmap {
  18         struct device_node      *of_node;
  19         unsigned long           *bitmap;
  20         spinlock_t              lock;
  21         unsigned int            irq_count;
  22         bool                    bitmap_from_slab;
  23 };
  24
  25 int msi_bitmap_alloc_hwirqs(struct msi_bitmap *bmp, int num);
  26 void msi_bitmap_free_hwirqs(struct msi_bitmap *bmp, unsigned int offset,
  27                             unsigned int num);
  28 void msi_bitmap_reserve_hwirq(struct msi_bitmap *bmp, unsigned int hwirq);
  29
  30 int msi_bitmap_reserve_dt_hwirqs(struct msi_bitmap *bmp);
  31
  32 int msi_bitmap_alloc(struct msi_bitmap *bmp, unsigned int irq_count,
  33                      struct device_node *of_node);
  34 void msi_bitmap_free(struct msi_bitmap *bmp);
  35
  36 #endif /* _POWERPC_SYSDEV_MSI_BITMAP_H */