diff options
Diffstat (limited to 'arch/powerpc/kvm/book3s_hv_cma.h')
| -rw-r--r-- | arch/powerpc/kvm/book3s_hv_cma.h | 27 |
1 files changed, 27 insertions, 0 deletions
diff --git a/arch/powerpc/kvm/book3s_hv_cma.h b/arch/powerpc/kvm/book3s_hv_cma.h new file mode 100644 index 00000000000..655144f75fa --- /dev/null +++ b/arch/powerpc/kvm/book3s_hv_cma.h @@ -0,0 +1,27 @@ +/* + * Contiguous Memory Allocator for ppc KVM hash pagetable based on CMA + * for DMA mapping framework + * + * Copyright IBM Corporation, 2013 + * Author Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com> + * + * This program is free software; you can redistribute it and/or + * modify it under the terms of the GNU General Public License as + * published by the Free Software Foundation; either version 2 of the + * License or (at your optional) any later version of the license. + * + */ + +#ifndef __POWERPC_KVM_CMA_ALLOC_H__ +#define __POWERPC_KVM_CMA_ALLOC_H__ +/* + * Both RMA and Hash page allocation will be multiple of 256K. + */ +#define KVM_CMA_CHUNK_ORDER 18 + +extern struct page *kvm_alloc_cma(unsigned long nr_pages, + unsigned long align_pages); +extern bool kvm_release_cma(struct page *pages, unsigned long nr_pages); +extern long kvm_cma_declare_contiguous(phys_addr_t size, + phys_addr_t alignment) __init; +#endif |