kernel/arch/unicore32/mm/dma-swiotlb.c

   1 /*
   2  * Contains routines needed to support swiotlb for UniCore32.
   3  *
   4  * Copyright (C) 2010 Guan Xuetao
   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 as published by the
   8  * Free Software Foundation;  either version 2 of the  License, or (at your
   9  * option) any later version.
  10  */
  11 #include <linux/pci.h>
  12 #include <linux/cache.h>
  13 #include <linux/module.h>
  14 #include <linux/dma-mapping.h>
  15 #include <linux/swiotlb.h>
  16 #include <linux/bootmem.h>
  17
  18 #include <asm/dma.h>
  19
  20 static void *unicore_swiotlb_alloc_coherent(struct device *dev, size_t size,
  21                                             dma_addr_t *dma_handle, gfp_t flags,
  22                                             struct dma_attrs *attrs)
  23 {
  24         return swiotlb_alloc_coherent(dev, size, dma_handle, flags);
  25 }
  26
  27 static void unicore_swiotlb_free_coherent(struct device *dev, size_t size,
  28                                           void *vaddr, dma_addr_t dma_addr,
  29                                           struct dma_attrs *attrs)
  30 {
  31         swiotlb_free_coherent(dev, size, vaddr, dma_addr);
  32 }
  33
  34 struct dma_map_ops swiotlb_dma_map_ops = {
  35         .alloc = unicore_swiotlb_alloc_coherent,
  36         .free = unicore_swiotlb_free_coherent,
  37         .map_sg = swiotlb_map_sg_attrs,
  38         .unmap_sg = swiotlb_unmap_sg_attrs,
  39         .dma_supported = swiotlb_dma_supported,
  40         .map_page = swiotlb_map_page,
  41         .unmap_page = swiotlb_unmap_page,
  42         .sync_single_for_cpu = swiotlb_sync_single_for_cpu,
  43         .sync_single_for_device = swiotlb_sync_single_for_device,
  44         .sync_sg_for_cpu = swiotlb_sync_sg_for_cpu,
  45         .sync_sg_for_device = swiotlb_sync_sg_for_device,
  46         .mapping_error = swiotlb_dma_mapping_error,
  47 };
  48 EXPORT_SYMBOL(swiotlb_dma_map_ops);