diff options
| author | Bart Van Assche <bart.vanassche@sandisk.com> | 2016-05-12 10:49:15 -0700 |
|---|---|---|
| committer | Doug Ledford <dledford@redhat.com> | 2016-05-13 13:37:57 -0400 |
| commit | 9aa8b3217ed3c13d4e3496020b140da0e6f49a08 (patch) | |
| tree | 4bf6441f7c72dcd7f07c15091e1212512446e680 /drivers/infiniband/hw/mlx5/mr.c | |
| parent | f83b2561a6d4ff12959660ad597580097b744941 (diff) | |
| download | linux-9aa8b3217ed3c13d4e3496020b140da0e6f49a08.tar.bz2 | |
IB/core: Enhance ib_map_mr_sg()
The SRP initiator allows to set max_sectors to a value that exceeds
the largest amount of data that can be mapped at once with an mlx4
HCA using fast registration and a page size of 4 KB. Hence modify
ib_map_mr_sg() such that it can map partial sg-elements. If an
sg-element has been mapped partially, let the caller know
which fraction has been mapped by adjusting *sg_offset.
Signed-off-by: Bart Van Assche <bart.vanassche@sandisk.com>
Tested-by: Laurence Oberman <loberman@redhat.com>
Cc: Christoph Hellwig <hch@lst.de>
Cc: Sagi Grimberg <sagi@grimberg.me>
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 | 8 |
1 files changed, 6 insertions, 2 deletions
diff --git a/drivers/infiniband/hw/mlx5/mr.c b/drivers/infiniband/hw/mlx5/mr.c index b678eac0f8b3..8cf2ce50511f 100644 --- a/drivers/infiniband/hw/mlx5/mr.c +++ b/drivers/infiniband/hw/mlx5/mr.c @@ -1752,10 +1752,11 @@ static int mlx5_ib_sg_to_klms(struct mlx5_ib_mr *mr, struct scatterlist *sgl, unsigned short sg_nents, - unsigned int sg_offset) + unsigned int *sg_offset_p) { struct scatterlist *sg = sgl; struct mlx5_klm *klms = mr->descs; + unsigned int sg_offset = sg_offset_p ? *sg_offset_p : 0; u32 lkey = mr->ibmr.pd->local_dma_lkey; int i; @@ -1774,6 +1775,9 @@ mlx5_ib_sg_to_klms(struct mlx5_ib_mr *mr, sg_offset = 0; } + if (sg_offset_p) + *sg_offset_p = sg_offset; + return i; } @@ -1792,7 +1796,7 @@ static int mlx5_set_page(struct ib_mr *ibmr, u64 addr) } int mlx5_ib_map_mr_sg(struct ib_mr *ibmr, struct scatterlist *sg, int sg_nents, - unsigned int sg_offset) + unsigned int *sg_offset) { struct mlx5_ib_mr *mr = to_mmr(ibmr); int n; |