[ofa-general] [PATCH 2/3][v1.2] dapl: adjust max_rdma_read_iov to 1 for query on iWARP devices
Arlin Davis
arlin.r.davis at intel.com
Fri Oct 3 11:04:05 PDT 2008
iWarp spec allows only one iov on rdma reads
Signed-off-by: Arlin Davis <ardavis at ichips.intel.com>
---
dapl/openib_cma/dapl_ib_util.c | 17 +++++++++++++++--
1 files changed, 15 insertions(+), 2 deletions(-)
diff --git a/dapl/openib_cma/dapl_ib_util.c b/dapl/openib_cma/dapl_ib_util.c
index afb7463..598afab 100755
--- a/dapl/openib_cma/dapl_ib_util.c
+++ b/dapl/openib_cma/dapl_ib_util.c
@@ -506,7 +506,14 @@ DAT_RETURN dapls_ib_query_hca(IN DAPL_HCA *hca_ptr,
ia_attr->transport_attr = NULL;
ia_attr->num_vendor_attr = 0;
ia_attr->vendor_attr = NULL;
- ia_attr->max_iov_segments_per_rdma_read = dev_attr.max_sge;
+ /* iWARP spec. - 1 sge for RDMA reads */
+ if (hca_ptr->ib_hca_handle->device->transport_type
+ == IBV_TRANSPORT_IWARP)
+ ia_attr->max_iov_segments_per_rdma_read = 1;
+ else
+ ia_attr->max_iov_segments_per_rdma_read =
+ dev_attr.max_sge;
+
ia_attr->max_iov_segments_per_rdma_write = dev_attr.max_sge;
/* save rd_atom for peer validation during connect requests */
hca_ptr->ib_trans.max_rdma_rd_in = dev_attr.max_qp_rd_atom;
@@ -538,7 +545,13 @@ DAT_RETURN dapls_ib_query_hca(IN DAPL_HCA *hca_ptr,
ep_attr->max_request_iov = dev_attr.max_sge;
ep_attr->max_rdma_read_in = dev_attr.max_qp_rd_atom;
ep_attr->max_rdma_read_out= dev_attr.max_qp_init_rd_atom;
- ep_attr->max_rdma_read_iov= dev_attr.max_sge;
+ /* iWARP spec. - 1 sge for RDMA reads */
+ if (hca_ptr->ib_hca_handle->device->transport_type
+ == IBV_TRANSPORT_IWARP)
+ ep_attr->max_rdma_read_iov = 1;
+ else
+ ep_attr->max_rdma_read_iov = dev_attr.max_sge;
+
ep_attr->max_rdma_write_iov= dev_attr.max_sge;
dapl_log(DAPL_DBG_TYPE_UTIL,
"dapl_query_hca: MAX msg %llu dto %d iov %d"
--
1.5.2.5
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