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IB: Refactor umem to use linear SG table

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This patch refactors the IB core umem code and vendor drivers to use a
linear (chained) SG table instead of chunk list.  With this change the
relevant code becomes clearer—no need for nested loops to build and
use umem.

Signed-off-by: Shachar Raindel <raindel@mellanox.com>
Signed-off-by: Yishai Hadas <yishaih@mellanox.com>
Signed-off-by: Roland Dreier <roland@purestorage.com>
This commit is contained in:
Yishai Hadas
2014-01-28 13:40:15 +02:00
committed by Roland Dreier
parent cfbf8d4857
commit eeb8461e36
16 changed files with 446 additions and 550 deletions
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11
include/rdma/ib_umem.h
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@@ -46,17 +46,12 @@ struct ib_umem {
int page_size;
int writable;
int hugetlb;
struct list_head chunk_list;
struct work_struct work;
struct mm_struct *mm;
unsigned long diff;
};
struct ib_umem_chunk {
struct list_head list;
int nents;
int nmap;
struct scatterlist page_list[0];
struct sg_table sg_head;
int nmap;
int npages;
};
#ifdef CONFIG_INFINIBAND_USER_MEM