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From c3ca971b1394fda6a35b50ea0af68cd66cd1e761 Mon Sep 17 00:00:00 2001
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From: Alaa Hleihel <ahleihel@redhat.com>
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Date: Tue, 12 May 2020 10:55:20 -0400
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Subject: [PATCH 203/312] [netdrv] net/mlx5: DR, On creation set CQ's arm_db
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member to right value
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Message-id: <20200512105530.4207-115-ahleihel@redhat.com>
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Patchwork-id: 306988
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Patchwork-instance: patchwork
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O-Subject: [RHEL8.3 BZ 1789382 114/124] net/mlx5: DR, On creation set CQ's arm_db member to right value
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Bugzilla: 1789384 1789382
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RH-Acked-by: Tony Camuso <tcamuso@redhat.com>
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RH-Acked-by: Kamal Heib <kheib@redhat.com>
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RH-Acked-by: Jarod Wilson <jarod@redhat.com>
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Bugzilla: http://bugzilla.redhat.com/1789382
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Bugzilla: http://bugzilla.redhat.com/1789384
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Upstream: v5.7-rc5
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commit 8075411d93b6efe143d9f606f6531077795b7fbf
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Author: Erez Shitrit <erezsh@mellanox.com>
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Date: Wed Mar 25 17:19:43 2020 +0200
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net/mlx5: DR, On creation set CQ's arm_db member to right value
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In polling mode, set arm_db member to a value that will avoid CQ
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event recovery by the HW.
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Otherwise we might get event without completion function.
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In addition,empty completion function to was added to protect from
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unexpected events.
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Fixes: 297cccebdc5a ("net/mlx5: DR, Expose an internal API to issue RDMA operations")
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Signed-off-by: Erez Shitrit <erezsh@mellanox.com>
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Reviewed-by: Tariq Toukan <tariqt@mellanox.com>
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Reviewed-by: Alex Vesker <valex@mellanox.com>
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Signed-off-by: Saeed Mahameed <saeedm@mellanox.com>
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Signed-off-by: Alaa Hleihel <ahleihel@redhat.com>
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Signed-off-by: Frantisek Hrbata <fhrbata@redhat.com>
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---
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drivers/net/ethernet/mellanox/mlx5/core/steering/dr_send.c | 14 +++++++++++++-
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1 file changed, 13 insertions(+), 1 deletion(-)
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diff --git a/drivers/net/ethernet/mellanox/mlx5/core/steering/dr_send.c b/drivers/net/ethernet/mellanox/mlx5/core/steering/dr_send.c
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index c0ab9cf74929..18719acb7e54 100644
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--- a/drivers/net/ethernet/mellanox/mlx5/core/steering/dr_send.c
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+++ b/drivers/net/ethernet/mellanox/mlx5/core/steering/dr_send.c
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@@ -695,6 +695,12 @@ static void dr_cq_event(struct mlx5_core_cq *mcq,
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pr_info("CQ event %u on CQ #%u\n", event, mcq->cqn);
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}
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+static void dr_cq_complete(struct mlx5_core_cq *mcq,
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+ struct mlx5_eqe *eqe)
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+{
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+ pr_err("CQ completion CQ: #%u\n", mcq->cqn);
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+}
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+
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static struct mlx5dr_cq *dr_create_cq(struct mlx5_core_dev *mdev,
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struct mlx5_uars_page *uar,
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size_t ncqe)
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@@ -756,6 +762,7 @@ static struct mlx5dr_cq *dr_create_cq(struct mlx5_core_dev *mdev,
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mlx5_fill_page_frag_array(&cq->wq_ctrl.buf, pas);
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cq->mcq.event = dr_cq_event;
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+ cq->mcq.comp = dr_cq_complete;
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err = mlx5_core_create_cq(mdev, &cq->mcq, in, inlen, out, sizeof(out));
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kvfree(in);
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@@ -767,7 +774,12 @@ static struct mlx5dr_cq *dr_create_cq(struct mlx5_core_dev *mdev,
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cq->mcq.set_ci_db = cq->wq_ctrl.db.db;
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cq->mcq.arm_db = cq->wq_ctrl.db.db + 1;
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*cq->mcq.set_ci_db = 0;
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- *cq->mcq.arm_db = 0;
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+
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+ /* set no-zero value, in order to avoid the HW to run db-recovery on
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+ * CQ that used in polling mode.
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+ */
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+ *cq->mcq.arm_db = cpu_to_be32(2 << 28);
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+
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cq->mcq.vector = 0;
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cq->mcq.irqn = irqn;
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cq->mcq.uar = uar;
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--
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2.13.6
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