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RDMA/bnxt_re: Add send queue size check for variable wqe

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BugLink: https://bugs.launchpad.net/bugs/2106632

[ 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@broadcom.com>
Signed-off-by: Damodharam Ammepalli <damodharam.ammepalli@broadcom.com>
Signed-off-by: Selvin Xavier <selvin.xavier@broadcom.com>
Link: https://patch.msgid.link/20241217102649.1377704-4-kalesh-anakkur.purayil@broadcom.com
Signed-off-by: Leon Romanovsky <leon@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
Signed-off-by: Manuel Diewald <manuel.diewald@canonical.com>
Signed-off-by: Mehmet Basaran <mehmet.basaran@canonical.com>
This commit is contained in:
Damodharam Ammepalli
2024-12-17 15:56:47 +05:30
committed by Mehmet Basaran
parent 9886c7f4b9
commit fc9f5fbe41
1 changed files with 4 additions and 0 deletions
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drivers/infiniband/hw/bnxt_re/qplib_sp.c
+4
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@@ -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);