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IB/iser: Do not use FMR for a single dma entry sg

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Fast Memory Registration (fmr) is used to register for rdma an sg whose
elements are not linearly sequential after dma mapping.

The IB verbs layer provides an "all dma memory MR (memory region)" which
can be used for RDMA-ing a dma linearly sequential buffer.

Change the code to use the dma mr instead of doing fmr when dma mapping
produces a single dma entry sg.

Signed-off-by: Erez Zilber <erezz@voltaire.com>
Signed-off-by: Roland Dreier <rolandd@cisco.com>
This commit is contained in:
Erez Zilber
2006-09-11 12:26:33 +03:00
committed by Roland Dreier
parent e981f1d4b8
commit d81110285f
3 changed files with 39 additions and 16 deletions
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1
drivers/infiniband/ulp/iser/iscsi_iser.h
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@@ -175,6 +175,7 @@ struct iser_mem_reg {
u64 va;
u64 len;
void *mem_h;
int is_fmr;
};
struct iser_regd_buf {