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RDMA/bnxt_re: Fix WQE Size posted to HW to prevent it from throwing error 

Posting WQE size of 2 results in a WQE_FORMAT_ERROR
thrown by the HW as it requires host to supply WQE Size with room
for atleast one SGE so that the resulting WQE size be atleast 3.

Signed-off-by: Somnath Kotur <somnath.kotur@broadcom.com>
Signed-off-by: Selvin Xavier <selvin.xavier@broadcom.com>
Signed-off-by: Doug Ledford <dledford@redhat.com>
This commit is contained in:
Somnath Kotur 2017-06-29 12:28:09 -07:00 committed by Doug Ledford
parent b3b2c7c550
commit ab69d4c8da
1 changed files with 10 additions and 0 deletions
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10
drivers/infiniband/hw/bnxt_re/qplib_fp.c
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@ -1128,6 +1128,11 @@ int bnxt_qplib_post_send(struct bnxt_qplib_qp *qp,
}
/* Each SGE entry = 1 WQE size16 */
wqe_size16 = wqe->num_sge;
/* HW requires wqe size has room for atleast one SGE even if
* none was supplied by ULP
*/
if (!wqe->num_sge)
wqe_size16++;
}
/* Specifics */
@ -1364,6 +1369,11 @@ int bnxt_qplib_post_recv(struct bnxt_qplib_qp *qp,
rqe->flags = wqe->flags;
rqe->wqe_size = wqe->num_sge +
((offsetof(typeof(*rqe), data) + 15) >> 4);
/* HW requires wqe size has room for atleast one SGE even if none
* was supplied by ULP
*/
if (!wqe->num_sge)
rqe->wqe_size++;
/* Supply the rqe->wr_id index to the wr_id_tbl for now */
rqe->wr_id[0] = cpu_to_le32(sw_prod);