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   1 /*
   2  * Copyright (C) 2008 Advanced Micro Devices, Inc.
   3  *
   4  * Author: Joerg Roedel <joerg.roedel@amd.com>
   5  *
   6  * This program is free software; you can redistribute it and/or modify it
   7  * under the terms of the GNU General Public License version 2 as published
   8  * by the Free Software Foundation.
   9  *
  10  * This program is distributed in the hope that it will be useful,
  11  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13  * GNU General Public License for more details.
  14  *
  15  * You should have received a copy of the GNU General Public License
  16  * along with this program; if not, write to the Free Software
  17  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307 USA
  18  */
  19
  20 #ifndef __DMA_DEBUG_H
  21 #define __DMA_DEBUG_H
  22
  23 #include <linux/types.h>
  24
  25 struct device;
  26 struct scatterlist;
  27
  28 #ifdef CONFIG_DMA_API_DEBUG
  29
  30 extern void dma_debug_init(u32 num_entries);
  31
  32 extern void debug_dma_map_page(struct device *dev, struct page *page,
  33                                size_t offset, size_t size,
  34                                int direction, dma_addr_t dma_addr,
  35                                bool map_single);
  36
  37 extern void debug_dma_unmap_page(struct device *dev, dma_addr_t addr,
  38                                  size_t size, int direction, bool map_single);
  39
  40 extern void debug_dma_map_sg(struct device *dev, struct scatterlist *sg,
  41                              int nents, int mapped_ents, int direction);
  42
  43 extern void debug_dma_unmap_sg(struct device *dev, struct scatterlist *sglist,
  44                                int nelems, int dir);
  45
  46 extern void debug_dma_alloc_coherent(struct device *dev, size_t size,
  47                                      dma_addr_t dma_addr, void *virt);
  48
  49 extern void debug_dma_free_coherent(struct device *dev, size_t size,
  50                                     void *virt, dma_addr_t addr);
  51
  52 extern void debug_dma_sync_single_for_cpu(struct device *dev,
  53                                           dma_addr_t dma_handle, size_t size,
  54                                           int direction);
  55
  56 extern void debug_dma_sync_single_for_device(struct device *dev,
  57                                              dma_addr_t dma_handle,
  58                                              size_t size, int direction);
  59
  60 #else /* CONFIG_DMA_API_DEBUG */
  61
  62 static inline void dma_debug_init(u32 num_entries)
  63 {
  64 }
  65
  66 static inline void debug_dma_map_page(struct device *dev, struct page *page,
  67                                       size_t offset, size_t size,
  68                                       int direction, dma_addr_t dma_addr,
  69                                       bool map_single)
  70 {
  71 }
  72
  73 static inline void debug_dma_unmap_page(struct device *dev, dma_addr_t addr,
  74                                         size_t size, int direction,
  75                                         bool map_single)
  76 {
  77 }
  78
  79 static inline void debug_dma_map_sg(struct device *dev, struct scatterlist *sg,
  80                                     int nents, int mapped_ents, int direction)
  81 {
  82 }
  83
  84 static inline void debug_dma_unmap_sg(struct device *dev,
  85                                       struct scatterlist *sglist,
  86                                       int nelems, int dir)
  87 {
  88 }
  89
  90 static inline void debug_dma_alloc_coherent(struct device *dev, size_t size,
  91                                             dma_addr_t dma_addr, void *virt)
  92 {
  93 }
  94
  95 static inline void debug_dma_free_coherent(struct device *dev, size_t size,
  96                                            void *virt, dma_addr_t addr)
  97 {
  98 }
  99
 100 static inline void debug_dma_sync_single_for_cpu(struct device *dev,
 101                                                  dma_addr_t dma_handle,
 102                                                  size_t size, int direction)
 103 {
 104 }
 105
 106 static inline void debug_dma_sync_single_for_device(struct device *dev,
 107                                                     dma_addr_t dma_handle,
 108                                                     size_t size, int direction)
 109 {
 110 }
 111
 112 #endif /* CONFIG_DMA_API_DEBUG */
 113
 114 #endif /* __DMA_DEBUG_H */