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authorEli Cohen <eli@mellanox.co.il>2009-05-27 14:38:34 -0700
committerRoland Dreier <rolandd@cisco.com>2009-05-27 14:38:34 -0700
commitab6bf42e2339580b5d87746d0ff4da4b1578b03e (patch)
tree670b1e1168e2a89ad782879154c9cdc9785b1c4c /drivers/net/mlx4/mr.c
parent210af919c949a7d6bd330916ef376cec2907d81e (diff)
downloadlinux-linaro-android-ab6bf42e2339580b5d87746d0ff4da4b1578b03e.tar.gz
mlx4_core: Add module parameter for number of MTTs per segment
The current MTT allocator uses kmalloc() to allocate a buffer for its buddy allocator, and thus is limited in the amount of MTT segments that it can control. As a result, the size of memory that can be registered is limited too. This patch uses a module parameter to control the number of MTT entries that each segment represents, allowing more memory to be registered with the same number of segments. Signed-off-by: Eli Cohen <eli@mellanox.co.il> Signed-off-by: Roland Dreier <rolandd@cisco.com>
Diffstat (limited to 'drivers/net/mlx4/mr.c')
-rw-r--r--drivers/net/mlx4/mr.c6
1 files changed, 3 insertions, 3 deletions
diff --git a/drivers/net/mlx4/mr.c b/drivers/net/mlx4/mr.c
index 0caf74cae8b..3b8973d1993 100644
--- a/drivers/net/mlx4/mr.c
+++ b/drivers/net/mlx4/mr.c
@@ -209,7 +209,7 @@ int mlx4_mtt_init(struct mlx4_dev *dev, int npages, int page_shift,
} else
mtt->page_shift = page_shift;
- for (mtt->order = 0, i = MLX4_MTT_ENTRY_PER_SEG; i < npages; i <<= 1)
+ for (mtt->order = 0, i = dev->caps.mtts_per_seg; i < npages; i <<= 1)
++mtt->order;
mtt->first_seg = mlx4_alloc_mtt_range(dev, mtt->order);
@@ -350,7 +350,7 @@ int mlx4_mr_enable(struct mlx4_dev *dev, struct mlx4_mr *mr)
mpt_entry->pd_flags |= cpu_to_be32(MLX4_MPT_PD_FLAG_FAST_REG |
MLX4_MPT_PD_FLAG_RAE);
mpt_entry->mtt_sz = cpu_to_be32((1 << mr->mtt.order) *
- MLX4_MTT_ENTRY_PER_SEG);
+ dev->caps.mtts_per_seg);
} else {
mpt_entry->flags |= cpu_to_be32(MLX4_MPT_FLAG_SW_OWNS);
}
@@ -391,7 +391,7 @@ static int mlx4_write_mtt_chunk(struct mlx4_dev *dev, struct mlx4_mtt *mtt,
(start_index + npages - 1) / (PAGE_SIZE / sizeof (u64)))
return -EINVAL;
- if (start_index & (MLX4_MTT_ENTRY_PER_SEG - 1))
+ if (start_index & (dev->caps.mtts_per_seg - 1))
return -EINVAL;
mtts = mlx4_table_find(&priv->mr_table.mtt_table, mtt->first_seg +