arch/powerpc/kvm/book3s_hv_cma.h

   1 /*
   2  * Contiguous Memory Allocator for ppc KVM hash pagetable  based on CMA
   3  * for DMA mapping framework
   4  *
   5  * Copyright IBM Corporation, 2013
   6  * Author Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>
   7  *
   8  * This program is free software; you can redistribute it and/or
   9  * modify it under the terms of the GNU General Public License as
  10  * published by the Free Software Foundation; either version 2 of the
  11  * License or (at your optional) any later version of the license.
  12  *
  13  */
  14
  15 #ifndef __POWERPC_KVM_CMA_ALLOC_H__
  16 #define __POWERPC_KVM_CMA_ALLOC_H__
  17 /*
  18  * Both RMA and Hash page allocation will be multiple of 256K.
  19  */
  20 #define KVM_CMA_CHUNK_ORDER     18
  21
  22 extern struct page *kvm_alloc_cma(unsigned long nr_pages,
  23                                   unsigned long align_pages);
  24 extern bool kvm_release_cma(struct page *pages, unsigned long nr_pages);
  25 extern long kvm_cma_declare_contiguous(phys_addr_t size,
  26                                        phys_addr_t alignment) __init;
  27 #endif