6.6-stable review patch. If anyone has any objections, please let me know.
------------------
From: Damodharam Ammepalli <damodharam.ammepalli@xxxxxxxxxxxx>
[ Upstream commit d13be54dc18baee7a3e44349b80755a8c8205d3f ]
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@xxxxxxxxxxxx>
Signed-off-by: Damodharam Ammepalli <damodharam.ammepalli@xxxxxxxxxxxx>
Signed-off-by: Selvin Xavier <selvin.xavier@xxxxxxxxxxxx>
Link: https://patch.msgid.link/20241217102649.1377704-4-kalesh-anakkur.purayil@xxxxxxxxxxxx
Signed-off-by: Leon Romanovsky <leon@xxxxxxxxxx>
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
---
drivers/infiniband/hw/bnxt_re/qplib_sp.c | 4 ++++
1 file changed, 4 insertions(+)
diff --git a/drivers/infiniband/hw/bnxt_re/qplib_sp.c b/drivers/infiniband/hw/bnxt_re/qplib_sp.c
index 577a6eaca4ce..74c3f6b26c4d 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);
--
2.39.5
