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mlx4: Enforce device max FMR maps in FMR alloc

Browse source 
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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2
drivers/infiniband/hw/mlx4/main.c
View file

@ -163,7 +163,7 @@ static int mlx4_ib_query_device(struct ib_device *ibdev,
props->max_mcast_qp_attach = dev->dev->caps.num_qp_per_mgm;
props->max_total_mcast_qp_attach = props->max_mcast_qp_attach *
props->max_mcast_grp;
props->max_map_per_fmr = (1 << (32 - ilog2(dev->dev->caps.num_mpts))) - 1;
props->max_map_per_fmr = dev->dev->caps.max_fmr_maps;
out:
kfree(in_mad);

2
drivers/net/ethernet/mellanox/mlx4/main.c
View file

@ -1131,6 +1131,8 @@ static int mlx4_init_hca(struct mlx4_dev *dev)
goto err_stop_fw;
}
dev->caps.max_fmr_maps = (1 << (32 - ilog2(dev->caps.num_mpts))) - 1;
init_hca.log_uar_sz = ilog2(dev->caps.num_uars);
init_hca.uar_page_sz = PAGE_SHIFT - 12;

3
drivers/net/ethernet/mellanox/mlx4/mr.c
View file

@ -816,6 +816,9 @@ int mlx4_fmr_alloc(struct mlx4_dev *dev, u32 pd, u32 access, int max_pages,
u64 mtt_offset;
int err = -ENOMEM;
if (max_maps > dev->caps.max_fmr_maps)
return -EINVAL;
if (page_shift < (ffs(dev->caps.page_size_cap) - 1) || page_shift >= 32)
return -EINVAL;

1
include/linux/mlx4/device.h
View file

@ -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;