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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>
This commit is contained in:
Eli Cohen 2013-09-11 16:35:35 +03:00 committed by Roland Dreier
parent ada9f5d007
commit fe45f82704
1 changed files with 8 additions and 3 deletions
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11
drivers/infiniband/hw/mlx5/mr.c
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@ -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;