arch/mips/cavium-octeon/dma-octeon.c

   1 /*
   2  * This file is subject to the terms and conditions of the GNU General Public
   3  * License.  See the file "COPYING" in the main directory of this archive
   4  * for more details.
   5  *
   6  * Copyright (C) 2000  Ani Joshi <ajoshi@unixbox.com>
   7  * Copyright (C) 2000, 2001  Ralf Baechle <ralf@gnu.org>
   8  * Copyright (C) 2005 Ilya A. Volynets-Evenbakh <ilya@total-knowledge.com>
   9  * swiped from i386, and cloned for MIPS by Geert, polished by Ralf.
  10  * IP32 changes by Ilya.
  11  * Cavium Networks: Create new dma setup for Cavium Networks Octeon based on
  12  * the kernels original.
  13  */
  14 #include <linux/types.h>
  15 #include <linux/mm.h>
  16
  17 #include <dma-coherence.h>
  18
  19 dma_addr_t octeon_map_dma_mem(struct device *dev, void *ptr, size_t size)
  20 {
  21         /* Without PCI/PCIe this function can be called for Octeon internal
  22            devices such as USB. These devices all support 64bit addressing */
  23         mb();
  24         return virt_to_phys(ptr);
  25 }
  26
  27 void octeon_unmap_dma_mem(struct device *dev, dma_addr_t dma_addr)
  28 {
  29         /* Without PCI/PCIe this function can be called for Octeon internal
  30          * devices such as USB. These devices all support 64bit addressing */
  31         return;
  32 }