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990978e993
Both RMA and hash page table request will be a multiple of 256K. We can use a chunk size of 256K to track the free/used 256K chunk in the bitmap. This should help to reduce the bitmap size. Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com> Acked-by: Paul Mackerras <paulus@samba.org> Signed-off-by: Alexander Graf <agraf@suse.de>
28 lines
927 B
C
28 lines
927 B
C
/*
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* Contiguous Memory Allocator for ppc KVM hash pagetable based on CMA
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* for DMA mapping framework
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*
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* Copyright IBM Corporation, 2013
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* Author Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License as
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* published by the Free Software Foundation; either version 2 of the
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* License or (at your optional) any later version of the license.
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*
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*/
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#ifndef __POWERPC_KVM_CMA_ALLOC_H__
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#define __POWERPC_KVM_CMA_ALLOC_H__
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/*
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* Both RMA and Hash page allocation will be multiple of 256K.
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*/
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#define KVM_CMA_CHUNK_ORDER 18
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extern struct page *kvm_alloc_cma(unsigned long nr_pages,
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unsigned long align_pages);
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extern bool kvm_release_cma(struct page *pages, unsigned long nr_pages);
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extern long kvm_cma_declare_contiguous(phys_addr_t size,
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phys_addr_t alignment) __init;
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#endif
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