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Message-Id: <20240219-stmmac-axi-config-v3-3-fca7f046e6ee@nvidia.com>
Date: Mon, 19 Feb 2024 17:46:06 +0100
From: Thierry Reding <thierry.reding@...il.com>
To: Alexandre Torgue <alexandre.torgue@...s.st.com>,
Jose Abreu <joabreu@...opsys.com>, "David S. Miller" <davem@...emloft.net>,
Eric Dumazet <edumazet@...gle.com>, Jakub Kicinski <kuba@...nel.org>,
Paolo Abeni <pabeni@...hat.com>
Cc: Serge Semit <fancer.lancer@...il.com>, netdev@...r.kernel.org,
linux-stm32@...md-mailman.stormreply.com,
linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org,
linux-tegra@...r.kernel.org, Thierry Reding <treding@...dia.com>
Subject: [PATCH net-next v3 3/3] net: stmmac: Configure AXI on Tegra234
MGBE
From: Thierry Reding <treding@...dia.com>
Allow the device to use bursts and increase the maximum number of
outstanding requests to improve performance. Measurements show an
increase in throughput of around 5x on a 1 Gbps link.
Signed-off-by: Thierry Reding <treding@...dia.com>
---
drivers/net/ethernet/stmicro/stmmac/dwmac-tegra.c | 9 +++++++++
1 file changed, 9 insertions(+)
diff --git a/drivers/net/ethernet/stmicro/stmmac/dwmac-tegra.c b/drivers/net/ethernet/stmicro/stmmac/dwmac-tegra.c
index bab57d1675df..b6bfa48f279d 100644
--- a/drivers/net/ethernet/stmicro/stmmac/dwmac-tegra.c
+++ b/drivers/net/ethernet/stmicro/stmmac/dwmac-tegra.c
@@ -199,6 +199,12 @@ static void mgbe_uphy_lane_bringup_serdes_down(struct net_device *ndev, void *mg
writel(value, mgbe->xpcs + XPCS_WRAP_UPHY_RX_CONTROL);
}
+static const struct stmmac_axi tegra234_mgbe_axi = {
+ .axi_wr_osr_lmt = 63,
+ .axi_rd_osr_lmt = 63,
+ .axi_blen = { 256, },
+};
+
static int tegra_mgbe_probe(struct platform_device *pdev)
{
struct plat_stmmacenet_data *plat;
@@ -284,6 +290,9 @@ static int tegra_mgbe_probe(struct platform_device *pdev)
if (err < 0)
goto disable_clks;
+ /* setup default AXI configuration */
+ res.axi = &tegra234_mgbe_axi;
+
plat = devm_stmmac_probe_config_dt(pdev, &res);
if (IS_ERR(plat)) {
err = PTR_ERR(plat);
--
2.43.2
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