From ab6bf42e2339580b5d87746d0ff4da4b1578b03e Mon Sep 17 00:00:00 2001 From: Eli Cohen Date: Wed, 27 May 2009 14:38:34 -0700 Subject: 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 Signed-off-by: Roland Dreier --- drivers/net/mlx4/mr.c | 6 +++--- 1 file changed, 3 insertions(+), 3 deletions(-) (limited to 'drivers/net/mlx4/mr.c') 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 + -- cgit v1.2.3