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| author | Christoph Hellwig <hch@lst.de> | 2016-05-03 18:01:04 +0200 |
|---|---|---|
| committer | Doug Ledford <dledford@redhat.com> | 2016-05-13 13:37:11 -0400 |
| commit | ff2ba9936591a1364ae21adf18366dca7608395a (patch) | |
| tree | 4bd33be266f57da2e8ccaaa5f9cc470315759d26 /drivers/infiniband/hw/mlx5/mr.c | |
| parent | 0691a286d59183c44b68defd398cb7af0354bd00 (diff) | |
| download | op-kernel-dev-ff2ba9936591a1364ae21adf18366dca7608395a.zip op-kernel-dev-ff2ba9936591a1364ae21adf18366dca7608395a.tar.gz | |
IB/core: Add passing an offset into the SG to ib_map_mr_sg
Signed-off-by: Christoph Hellwig <hch@lst.de>
Tested-by: Steve Wise <swise@opengridcomputing.com>
Reviewed-by: Bart Van Assche <bart.vanassche@sandisk.com>
Reviewed-by: Sagi Grimberg <sagi@grimberg.me>
Reviewed-by: Steve Wise <swise@opengridcomputing.com>
Signed-off-by: Doug Ledford <dledford@redhat.com>
Diffstat (limited to 'drivers/infiniband/hw/mlx5/mr.c')
| -rw-r--r-- | drivers/infiniband/hw/mlx5/mr.c | 21 |
1 files changed, 12 insertions, 9 deletions
diff --git a/drivers/infiniband/hw/mlx5/mr.c b/drivers/infiniband/hw/mlx5/mr.c index 4d5bff1..b678eac 100644 --- a/drivers/infiniband/hw/mlx5/mr.c +++ b/drivers/infiniband/hw/mlx5/mr.c @@ -1751,24 +1751,27 @@ done: static int mlx5_ib_sg_to_klms(struct mlx5_ib_mr *mr, struct scatterlist *sgl, - unsigned short sg_nents) + unsigned short sg_nents, + unsigned int sg_offset) { struct scatterlist *sg = sgl; struct mlx5_klm *klms = mr->descs; u32 lkey = mr->ibmr.pd->local_dma_lkey; int i; - mr->ibmr.iova = sg_dma_address(sg); + mr->ibmr.iova = sg_dma_address(sg) + sg_offset; mr->ibmr.length = 0; mr->ndescs = sg_nents; for_each_sg(sgl, sg, sg_nents, i) { if (unlikely(i > mr->max_descs)) break; - klms[i].va = cpu_to_be64(sg_dma_address(sg)); - klms[i].bcount = cpu_to_be32(sg_dma_len(sg)); + klms[i].va = cpu_to_be64(sg_dma_address(sg) + sg_offset); + klms[i].bcount = cpu_to_be32(sg_dma_len(sg) - sg_offset); klms[i].key = cpu_to_be32(lkey); mr->ibmr.length += sg_dma_len(sg); + + sg_offset = 0; } return i; @@ -1788,9 +1791,8 @@ static int mlx5_set_page(struct ib_mr *ibmr, u64 addr) return 0; } -int mlx5_ib_map_mr_sg(struct ib_mr *ibmr, - struct scatterlist *sg, - int sg_nents) +int mlx5_ib_map_mr_sg(struct ib_mr *ibmr, struct scatterlist *sg, int sg_nents, + unsigned int sg_offset) { struct mlx5_ib_mr *mr = to_mmr(ibmr); int n; @@ -1802,9 +1804,10 @@ int mlx5_ib_map_mr_sg(struct ib_mr *ibmr, DMA_TO_DEVICE); if (mr->access_mode == MLX5_ACCESS_MODE_KLM) - n = mlx5_ib_sg_to_klms(mr, sg, sg_nents); + n = mlx5_ib_sg_to_klms(mr, sg, sg_nents, sg_offset); else - n = ib_sg_to_pages(ibmr, sg, sg_nents, mlx5_set_page); + n = ib_sg_to_pages(ibmr, sg, sg_nents, sg_offset, + mlx5_set_page); ib_dma_sync_single_for_device(ibmr->device, mr->desc_map, mr->desc_size * mr->max_descs, |
