diff options
| author | Steve Wise | 2018-06-18 17:05:26 +0200 |
|---|---|---|
| committer | Jason Gunthorpe | 2018-06-18 21:17:28 +0200 |
| commit | 33023fb85a42b53bf778bc025f9667b582282be4 (patch) | |
| tree | 66d55701f7cc41636dcfc4353e38b4262791b47f /drivers/infiniband/hw/hfi1 | |
| parent | IB/rxe: avoid unnecessary NULL check (diff) | |
| download | kernel-qcow2-linux-33023fb85a42b53bf778bc025f9667b582282be4.tar.gz kernel-qcow2-linux-33023fb85a42b53bf778bc025f9667b582282be4.tar.xz kernel-qcow2-linux-33023fb85a42b53bf778bc025f9667b582282be4.zip | |
IB/core: add max_send_sge and max_recv_sge attributes
This patch replaces the ib_device_attr.max_sge with max_send_sge and
max_recv_sge. It allows ulps to take advantage of devices that have very
different send and recv sge depths. For example cxgb4 has a max_recv_sge
of 4, yet a max_send_sge of 16. Splitting out these attributes allows
much more efficient use of the SQ for cxgb4 with ulps that use the RDMA_RW
API. Consider a large RDMA WRITE that has 16 scattergather entries.
With max_sge of 4, the ulp would send 4 WRITE WRs, but with max_sge of
16, it can be done with 1 WRITE WR.
Acked-by: Sagi Grimberg <sagi@grimberg.me>
Acked-by: Christoph Hellwig <hch@lst.de>
Acked-by: Selvin Xavier <selvin.xavier@broadcom.com>
Acked-by: Shiraz Saleem <shiraz.saleem@intel.com>
Acked-by: Dennis Dalessandro <dennis.dalessandro@intel.com>
Signed-off-by: Steve Wise <swise@opengridcomputing.com>
Signed-off-by: Jason Gunthorpe <jgg@mellanox.com>
Diffstat (limited to 'drivers/infiniband/hw/hfi1')
| -rw-r--r-- | drivers/infiniband/hw/hfi1/verbs.c | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/drivers/infiniband/hw/hfi1/verbs.c b/drivers/infiniband/hw/hfi1/verbs.c index 08991874c0e2..b7c75b63f887 100644 --- a/drivers/infiniband/hw/hfi1/verbs.c +++ b/drivers/infiniband/hw/hfi1/verbs.c @@ -1410,7 +1410,8 @@ static void hfi1_fill_device_attr(struct hfi1_devdata *dd) rdi->dparms.props.max_fast_reg_page_list_len = UINT_MAX; rdi->dparms.props.max_qp = hfi1_max_qps; rdi->dparms.props.max_qp_wr = hfi1_max_qp_wrs; - rdi->dparms.props.max_sge = hfi1_max_sges; + rdi->dparms.props.max_send_sge = hfi1_max_sges; + rdi->dparms.props.max_recv_sge = hfi1_max_sges; rdi->dparms.props.max_sge_rd = hfi1_max_sges; rdi->dparms.props.max_cq = hfi1_max_cqs; rdi->dparms.props.max_ah = hfi1_max_ahs; |