53 lines
2.1 KiB
Diff
53 lines
2.1 KiB
Diff
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From a8ab0bbc8f17a0099c4982f3e0cb78f6c323fa46 Mon Sep 17 00:00:00 2001
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From: David Thompson <davthompson@nvidia.com>
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Date: Thu, 5 May 2022 12:23:09 -0400
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Subject: [PATCH backport 5.10 30/63] mlxbf_gige: increase MDIO polling rate to
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5us
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BugLink: https://bugs.launchpad.net/bugs/1979827
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This patch increases the polling rate used by the
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mlxbf_gige driver on the MDIO bus. The previous
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polling rate was every 100us, and the new rate is
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every 5us. With this change the amount of time
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spent waiting for the MDIO BUSY signal to de-assert
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drops from ~100us to ~27us for each operation.
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Signed-off-by: David Thompson <davthompson@nvidia.com>
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Signed-off-by: Asmaa Mnebhi <asmaa@nvidia.com>
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Link: https://lore.kernel.org/r/20220505162309.20050-1-davthompson@nvidia.com
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Signed-off-by: Jakub Kicinski <kuba@kernel.org>
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(cherry picked from commit 0a02e282bad4dad455553fc2b9268cf1d003f132)
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Signed-off-by: Ike Panhc <ike.pan@canonical.com>
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---
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drivers/net/ethernet/mellanox/mlxbf_gige/mlxbf_gige_mdio.c | 6 ++++--
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1 file changed, 4 insertions(+), 2 deletions(-)
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diff --git a/drivers/net/ethernet/mellanox/mlxbf_gige/mlxbf_gige_mdio.c b/drivers/net/ethernet/mellanox/mlxbf_gige/mlxbf_gige_mdio.c
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index e32dd34fd..6c8a4a529 100644
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--- a/drivers/net/ethernet/mellanox/mlxbf_gige/mlxbf_gige_mdio.c
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+++ b/drivers/net/ethernet/mellanox/mlxbf_gige/mlxbf_gige_mdio.c
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@@ -105,7 +105,8 @@ static int mlxbf_gige_mdio_read(struct mii_bus *bus, int phy_add, int phy_reg)
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writel(cmd, priv->mdio_io + MLXBF_GIGE_MDIO_GW_OFFSET);
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ret = readl_poll_timeout_atomic(priv->mdio_io + MLXBF_GIGE_MDIO_GW_OFFSET,
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- val, !(val & MLXBF_GIGE_MDIO_GW_BUSY_MASK), 100, 1000000);
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+ val, !(val & MLXBF_GIGE_MDIO_GW_BUSY_MASK),
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+ 5, 1000000);
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if (ret) {
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writel(0, priv->mdio_io + MLXBF_GIGE_MDIO_GW_OFFSET);
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@@ -137,7 +138,8 @@ static int mlxbf_gige_mdio_write(struct mii_bus *bus, int phy_add,
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/* If the poll timed out, drop the request */
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ret = readl_poll_timeout_atomic(priv->mdio_io + MLXBF_GIGE_MDIO_GW_OFFSET,
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- temp, !(temp & MLXBF_GIGE_MDIO_GW_BUSY_MASK), 100, 1000000);
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+ temp, !(temp & MLXBF_GIGE_MDIO_GW_BUSY_MASK),
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+ 5, 1000000);
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return ret;
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}
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--
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2.20.1
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