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mlx4: Enforce device max FMR maps in FMR alloc

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ConnectX devices have a limit on the number of mappings that can be
done on an FMR before having to call sync_tpt.  The current
mlx4_ib driver reports the limit correctly in max_map_per_fmr in
.query_device(), but mlx4_core doesn't check it when actually
allocating FMRs.

Add a max_fmr_maps field to struct mlx4_caps and enforce this maximum
value on FMR allocations.

Signed-off-by: Eli Cohen <eli@mellanox.com>
Signed-off-by: Roland Dreier <roland@purestorage.com>
This commit is contained in:
Eli Cohen
2012-02-09 18:10:06 +02:00
committed by Roland Dreier
parent 4ba6b8eaa9
commit a5bbe892da
4 changed files with 7 additions and 1 deletions
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include/linux/mlx4/device.h
+1
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@@ -273,6 +273,7 @@ struct mlx4_caps {
int num_comp_vectors;
int comp_pool;
int num_mpts;
int max_fmr_maps;
int num_mtts;
int fmr_reserved_mtts;
int reserved_mtts;