include/linux/iova_bitmap.h

   1 /* SPDX-License-Identifier: GPL-2.0 */
   2 /*
   3  * Copyright (c) 2022, Oracle and/or its affiliates.
   4  * Copyright (c) 2022, NVIDIA CORPORATION & AFFILIATES. All rights reserved
   5  */
   6 #ifndef _IOVA_BITMAP_H_
   7 #define _IOVA_BITMAP_H_
   8
   9 #include <linux/types.h>
  10 #include <linux/errno.h>
  11
  12 struct iova_bitmap;
  13
  14 typedef int (*iova_bitmap_fn_t)(struct iova_bitmap *bitmap,
  15                                 unsigned long iova, size_t length,
  16                                 void *opaque);
  17
  18 #if IS_ENABLED(CONFIG_IOMMUFD_DRIVER)
  19 struct iova_bitmap *iova_bitmap_alloc(unsigned long iova, size_t length,
  20                                       unsigned long page_size,
  21                                       u64 __user *data);
  22 void iova_bitmap_free(struct iova_bitmap *bitmap);
  23 int iova_bitmap_for_each(struct iova_bitmap *bitmap, void *opaque,
  24                          iova_bitmap_fn_t fn);
  25 void iova_bitmap_set(struct iova_bitmap *bitmap,
  26                      unsigned long iova, size_t length);
  27 #else
  28 static inline struct iova_bitmap *iova_bitmap_alloc(unsigned long iova,
  29                                                     size_t length,
  30                                                     unsigned long page_size,
  31                                                     u64 __user *data)
  32 {
  33         return NULL;
  34 }
  35
  36 static inline void iova_bitmap_free(struct iova_bitmap *bitmap)
  37 {
  38 }
  39
  40 static inline int iova_bitmap_for_each(struct iova_bitmap *bitmap, void *opaque,
  41                                        iova_bitmap_fn_t fn)
  42 {
  43         return -EOPNOTSUPP;
  44 }
  45
  46 static inline void iova_bitmap_set(struct iova_bitmap *bitmap,
  47                                    unsigned long iova, size_t length)
  48 {
  49 }
  50 #endif
  51
  52 #endif