diff options
| author | Eli Cohen <eli@mellanox.com> | 2013-09-11 16:35:35 +0300 |
|---|---|---|
| committer | Roland Dreier <roland@purestorage.com> | 2013-10-10 09:23:59 -0700 |
| commit | fe45f8270436103c305645a6d9d86a9141b9fe09 (patch) | |
| tree | cd3a565281ef5a66c5e8fd78e171d154f37d5e24 /drivers/infiniband | |
| parent | ada9f5d007971a71d619e2abf66ebd3a9a399413 (diff) | |
| download | blackbird-op-linux-fe45f8270436103c305645a6d9d86a9141b9fe09.tar.gz blackbird-op-linux-fe45f8270436103c305645a6d9d86a9141b9fe09.zip | |
IB/mlx5: Fix alignment of reg umr gather buffers
The hardware requires that gather buffers for UMR work requests be
aligned to 2K.
Signed-off-by: Eli Cohen <eli@mellanox.com>
Signed-off-by: Roland Dreier <roland@purestorage.com>
Diffstat (limited to 'drivers/infiniband')
| -rw-r--r-- | drivers/infiniband/hw/mlx5/mr.c | 11 |
1 files changed, 8 insertions, 3 deletions
diff --git a/drivers/infiniband/hw/mlx5/mr.c b/drivers/infiniband/hw/mlx5/mr.c index 06e33e6cb07f..154241290f5c 100644 --- a/drivers/infiniband/hw/mlx5/mr.c +++ b/drivers/infiniband/hw/mlx5/mr.c @@ -42,6 +42,10 @@ enum { DEF_CACHE_SIZE = 10, }; +enum { + MLX5_UMR_ALIGN = 2048 +}; + static __be64 *mr_align(__be64 *ptr, int align) { unsigned long mask = align - 1; @@ -671,12 +675,12 @@ static struct mlx5_ib_mr *reg_umr(struct ib_pd *pd, struct ib_umem *umem, if (!mr) return ERR_PTR(-EAGAIN); - mr->pas = kmalloc(size + 0x3f, GFP_KERNEL); + mr->pas = kmalloc(size + MLX5_UMR_ALIGN - 1, GFP_KERNEL); if (!mr->pas) { err = -ENOMEM; goto error; } - mr->dma = dma_map_single(ddev, mr_align(mr->pas, 0x40), size, + mr->dma = dma_map_single(ddev, mr_align(mr->pas, MLX5_UMR_ALIGN), size, DMA_TO_DEVICE); if (dma_mapping_error(ddev, mr->dma)) { kfree(mr->pas); @@ -684,7 +688,8 @@ static struct mlx5_ib_mr *reg_umr(struct ib_pd *pd, struct ib_umem *umem, goto error; } - mlx5_ib_populate_pas(dev, umem, page_shift, mr_align(mr->pas, 0x40), 1); + mlx5_ib_populate_pas(dev, umem, page_shift, + mr_align(mr->pas, MLX5_UMR_ALIGN), 1); memset(&wr, 0, sizeof(wr)); wr.wr_id = (u64)(unsigned long)mr; |
