From a5bbe892da9441835cb6fece26d9bbd95fc820be Mon Sep 17 00:00:00 2001 From: Eli Cohen Date: Thu, 9 Feb 2012 18:10:06 +0200 Subject: mlx4: Enforce device max FMR maps in FMR alloc 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 Signed-off-by: Roland Dreier --- drivers/net/ethernet/mellanox/mlx4/main.c | 2 ++ drivers/net/ethernet/mellanox/mlx4/mr.c | 3 +++ 2 files changed, 5 insertions(+) (limited to 'drivers/net/ethernet/mellanox') diff --git a/drivers/net/ethernet/mellanox/mlx4/main.c b/drivers/net/ethernet/mellanox/mlx4/main.c index 678558b502fc..3e593ae56e00 100644 --- a/drivers/net/ethernet/mellanox/mlx4/main.c +++ b/drivers/net/ethernet/mellanox/mlx4/main.c @@ -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; diff --git a/drivers/net/ethernet/mellanox/mlx4/mr.c b/drivers/net/ethernet/mellanox/mlx4/mr.c index 25a80d71fb2a..5b7c06e0cd05 100644 --- a/drivers/net/ethernet/mellanox/mlx4/mr.c +++ b/drivers/net/ethernet/mellanox/mlx4/mr.c @@ -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; -- cgit v1.2.1