e18c176d9d
Removed the ifdef linux from this function. Added stub function for contiguous pages to avoid compilation errors. Submitted by: Orit Moskovich (oritm mellanox.com) Approved by: re
102 lines
3.3 KiB
C
102 lines
3.3 KiB
C
/*
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* Copyright (c) 2007 Cisco Systems. All rights reserved.
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*
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* This software is available to you under a choice of one of two
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* licenses. You may choose to be licensed under the terms of the GNU
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* General Public License (GPL) Version 2, available from the file
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* COPYING in the main directory of this source tree, or the
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* OpenIB.org BSD license below:
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*
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* Redistribution and use in source and binary forms, with or
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* without modification, are permitted provided that the following
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* conditions are met:
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*
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* - Redistributions of source code must retain the above
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* copyright notice, this list of conditions and the following
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* disclaimer.
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*
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* - Redistributions in binary form must reproduce the above
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* copyright notice, this list of conditions and the following
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* disclaimer in the documentation and/or other materials
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* provided with the distribution.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
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* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
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* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
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* BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
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* ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
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* CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
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* SOFTWARE.
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*/
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#ifndef IB_UMEM_H
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#define IB_UMEM_H
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#include <linux/list.h>
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#include <linux/scatterlist.h>
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#include <linux/workqueue.h>
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#include <linux/dma-attrs.h>
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struct ib_ucontext;
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struct ib_umem {
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struct ib_ucontext *context;
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size_t length;
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int offset;
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int page_size;
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int writable;
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int hugetlb;
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struct list_head chunk_list;
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#ifdef __linux__
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struct work_struct work;
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struct mm_struct *mm;
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#else
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unsigned long start;
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#endif
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unsigned long diff;
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};
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struct ib_cmem {
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struct ib_ucontext *context;
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size_t length;
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/* Link list of contiguous blocks being part of that cmem */
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struct list_head ib_cmem_block;
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/* Order of cmem block, 2^ block_order will equal number
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of physical pages per block
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*/
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unsigned long block_order;
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/* Refernce counter for that memory area
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- When value became 0 pages will be returned to the kernel.
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*/
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struct kref refcount;
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};
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struct ib_umem_chunk {
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struct list_head list;
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int nents;
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int nmap;
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struct dma_attrs attrs;
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struct scatterlist page_list[0];
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};
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struct ib_umem *ib_umem_get(struct ib_ucontext *context, unsigned long addr,
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size_t size, int access, int dmasync);
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void ib_umem_release(struct ib_umem *umem);
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int ib_umem_page_count(struct ib_umem *umem);
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int ib_cmem_map_contiguous_pages_to_vma(struct ib_cmem *ib_cmem,
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struct vm_area_struct *vma);
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struct ib_cmem *ib_cmem_alloc_contiguous_pages(struct ib_ucontext *context,
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unsigned long total_size,
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unsigned long page_size_order);
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void ib_cmem_release_contiguous_pages(struct ib_cmem *cmem);
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int ib_umem_map_to_vma(struct ib_umem *umem,
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struct vm_area_struct *vma);
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#endif /* IB_UMEM_H */
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