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bnxt_en: Fix TQM fastpath ring backing store computation 

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: c7dd7ab4b2 ("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>
This commit is contained in:
Rukhsana Ansari 2021-06-18 02:07:26 -04:00 committed by David S. Miller
parent 0afd6a4e80
commit c12e1643d2
1 changed files with 1 additions and 1 deletions
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2
drivers/net/ethernet/broadcom/bnxt/bnxt.c
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@ -7308,7 +7308,7 @@ 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++) {