RDMA/bnxt_re: Fix the max CQ WQEs for older adapters

Older adapters doesn't support the MAX CQ WQEs reported by older FW. So
restrict the value reported to 1M always for older adapters.

Fixes: 1ac5a4047975 ("RDMA/bnxt_re: Add bnxt_re RoCE driver")
Link: https://patch.msgid.link/r/1728373302-19530-2-git-send-email-selvin.xavier@broadcom.com
Signed-off-by: Abhishek Mohapatra<abhishek.mohapatra@broadcom.com>
Reviewed-by: Chandramohan Akula <chandramohan.akula@broadcom.com>
Signed-off-by: Selvin Xavier <selvin.xavier@broadcom.com>
Signed-off-by: Jason Gunthorpe <jgg@nvidia.com>

diff --git a/drivers/infiniband/hw/bnxt_re/qplib_sp.c b/drivers/infiniband/hw/bnxt_re/qplib_sp.c
index 4f75e7e..32c1cc7 100644 (file)
--- a/drivers/infiniband/hw/bnxt_re/qplib_sp.c
+++ b/drivers/infiniband/hw/bnxt_re/qplib_sp.c
@@ -140,6 +140,8 @@ int bnxt_qplib_get_dev_attr(struct bnxt_qplib_rcfw *rcfw,
                            min_t(u32, sb->max_sge_var_wqe, BNXT_VAR_MAX_SGE) : 6;
        attr->max_cq = le32_to_cpu(sb->max_cq);
        attr->max_cq_wqes = le32_to_cpu(sb->max_cqe);
+       if (!bnxt_qplib_is_chip_gen_p7(rcfw->res->cctx))
+               attr->max_cq_wqes = min_t(u32, BNXT_QPLIB_MAX_CQ_WQES, attr->max_cq_wqes);
        attr->max_cq_sges = attr->max_qp_sges;
        attr->max_mr = le32_to_cpu(sb->max_mr);
        attr->max_mw = le32_to_cpu(sb->max_mw);

diff --git a/drivers/infiniband/hw/bnxt_re/qplib_sp.h b/drivers/infiniband/hw/bnxt_re/qplib_sp.h
index acd9c14..ecf3f45 100644 (file)
--- a/drivers/infiniband/hw/bnxt_re/qplib_sp.h
+++ b/drivers/infiniband/hw/bnxt_re/qplib_sp.h
@@ -56,6 +56,7 @@ struct bnxt_qplib_dev_attr {
        u32                             max_qp_wqes;
        u32                             max_qp_sges;
        u32                             max_cq;
+#define BNXT_QPLIB_MAX_CQ_WQES          0xfffff
        u32                             max_cq_wqes;
        u32                             max_cq_sges;
        u32                             max_mr;