bnxt_en: Fix TQM fastpath ring backing store computation

[ Upstream commit c12e1643d2738bcd4e26252ce531878841dd3f38 ]

TQM fastpath ring needs to be sized to store both the requester
and responder side of RoCE QPs in TQM for supporting bi-directional
tests.  Fix bnxt_alloc_ctx_mem() to multiply the RoCE QPs by a factor of
2 when computing the number of entries for TQM fastpath ring.  This
fixes an RX pipeline stall issue when running bi-directional max
RoCE QP tests.

Fixes: c7dd7ab4b204 ("bnxt_en: Improve TQM ring context memory sizing formulas.")
Signed-off-by: Rukhsana Ansari <rukhsana.ansari@broadcom.com>
Signed-off-by: Michael Chan <michael.chan@broadcom.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Sasha Levin <sashal@kernel.org>

diff --git a/drivers/net/ethernet/broadcom/bnxt/bnxt.c b/drivers/net/ethernet/broadcom/bnxt/bnxt.c
index 70c03c156e00aa0bb0b9071e83e4e7ecdb42324a..3f3d13a18992ab011d85dcb0d53535bb10f78db5 100644 (file)
--- a/drivers/net/ethernet/broadcom/bnxt/bnxt.c
+++ b/drivers/net/ethernet/broadcom/bnxt/bnxt.c
@@ -7184,7 +7184,7 @@ skip_rdma:
        entries_sp = ctx->vnic_max_vnic_entries + ctx->qp_max_l2_entries +
                     2 * (extra_qps + ctx->qp_min_qp1_entries) + min;
        entries_sp = roundup(entries_sp, ctx->tqm_entries_multiple);
-       entries = ctx->qp_max_l2_entries + extra_qps + ctx->qp_min_qp1_entries;
+       entries = ctx->qp_max_l2_entries + 2 * (extra_qps + ctx->qp_min_qp1_entries);
        entries = roundup(entries, ctx->tqm_entries_multiple);
        entries = clamp_t(u32, entries, min, ctx->tqm_max_entries_per_ring);
        for (i = 0; i < ctx->tqm_fp_rings_count + 1; i++) {