Commit d13be54d authored by Damodharam Ammepalli's avatar Damodharam Ammepalli Committed by Leon Romanovsky
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RDMA/bnxt_re: Add send queue size check for variable wqe 



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: de1d364c ("RDMA/bnxt_re: Add support for Variable WQE in Genp7 adapters")
Reviewed-by: default avatarKalesh AP <kalesh-anakkur.purayil@broadcom.com>
Signed-off-by: default avatarDamodharam Ammepalli <damodharam.ammepalli@broadcom.com>
Signed-off-by: default avatarSelvin Xavier <selvin.xavier@broadcom.com>
Link: https://patch.msgid.link/20241217102649.1377704-4-kalesh-anakkur.purayil@broadcom.com


Signed-off-by: default avatarLeon Romanovsky <leon@kernel.org>
parent d5a38bf2

drivers/infiniband/hw/bnxt_re/qplib_sp.c

+4 −0
Original line number Diff line number Diff line
@@ -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);