diff mbox series

[for-rc,3/5] RDMA/bnxt_re: Add send queue size check for variable wqe

Message ID 20241217102649.1377704-4-kalesh-anakkur.purayil@broadcom.com (mailing list archive)
State New
Headers show
Series bnxt_re bug fixes | expand

Commit Message

Kalesh AP Dec. 17, 2024, 10:26 a.m. UTC 
From: Damodharam Ammepalli <damodharam.ammepalli@broadcom.com>

For the fixed WQE case, HW supports 0xFFFF WQEs.
For variable Size WQEs, HW treats this number as
the 16 bytes slots. The maximum supported WQEs
needs to be adjusted based on the number of slots.
Set a maximum WQE limit for variable WQE scenario.

Fixes: de1d364c3815 ("RDMA/bnxt_re: Add support for Variable WQE in Genp7 adapters")
Reviewed-by: Kalesh AP <kalesh-anakkur.purayil@broadcom.com>
Signed-off-by: Damodharam Ammepalli <damodharam.ammepalli@broadcom.com>
Signed-off-by: Selvin Xavier <selvin.xavier@broadcom.com>
---
 drivers/infiniband/hw/bnxt_re/qplib_sp.c | 4 ++++
 1 file changed, 4 insertions(+)
diff mbox series

Patch

diff --git a/drivers/infiniband/hw/bnxt_re/qplib_sp.c b/drivers/infiniband/hw/bnxt_re/qplib_sp.c
index 776f8f1f1432..9df3e3271577 100644
--- a/drivers/infiniband/hw/bnxt_re/qplib_sp.c
+++ b/drivers/infiniband/hw/bnxt_re/qplib_sp.c
@@ -138,6 +138,10 @@  int bnxt_qplib_get_dev_attr(struct bnxt_qplib_rcfw *rcfw,
 		attr->max_qp_wqes -= BNXT_QPLIB_RESERVED_QP_WRS + 1;
 	}
 
+	/* Adjust for max_qp_wqes for variable wqe */
+	if (cctx->modes.wqe_mode == BNXT_QPLIB_WQE_MODE_VARIABLE)
+		attr->max_qp_wqes = BNXT_VAR_MAX_WQE - 1;
+
 	attr->max_qp_sges = cctx->modes.wqe_mode == BNXT_QPLIB_WQE_MODE_VARIABLE ?
 			    min_t(u32, sb->max_sge_var_wqe, BNXT_VAR_MAX_SGE) : 6;
 	attr->max_cq = le32_to_cpu(sb->max_cq);