diff options
| author |   Steve Wise <swise@opengridcomputing.com> | 2018-06-18 08:05:26 -0700 |
|---|---|---|
| committer |   Jason Gunthorpe <jgg@mellanox.com> | 2018-06-18 13:17:28 -0600 |
| commit | 33023fb85a42b53bf778bc025f9667b582282be4 (patch) | |
| tree | 66d55701f7cc41636dcfc4353e38b4262791b47f /drivers/nvme/target | |
| parent | IB/rxe: avoid unnecessary NULL check (diff) | |
| download | linux-dev-33023fb85a42b53bf778bc025f9667b582282be4.tar.xz linux-dev-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/nvme/target')
| -rw-r--r-- | drivers/nvme/target/rdma.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/nvme/target/rdma.c b/drivers/nvme/target/rdma.c index 52e0c5d579a7..0d7f3d603f1d 100644 --- a/drivers/nvme/target/rdma.c +++ b/drivers/nvme/target/rdma.c @@ -874,7 +874,7 @@ static int nvmet_rdma_create_queue_ib(struct nvmet_rdma_queue *queue) qp_attr.cap.max_send_wr = queue->send_queue_size + 1; qp_attr.cap.max_rdma_ctxs = queue->send_queue_size; qp_attr.cap.max_send_sge = max(ndev->device->attrs.max_sge_rd, - ndev->device->attrs.max_sge); + ndev->device->attrs.max_send_sge); if (ndev->srq) { qp_attr.srq = ndev->srq; |