From: Nicolas Ferre <nicolas.ferre@microchip.com>
To: <netdev@vger.kernel.org>
Cc: <linux-kernel@vger.kernel.org>,
<linux-arm-kernel@lists.infradead.org>,
Claudiu Beznea <claudiu.beznea@microchip.com>,
Alexandre Belloni <alexandre.belloni@bootlin.com>,
Ludovic Desroches <ludovic.desroches@microchip.com>,
<devicetree@vger.kernel.org>,
"Nicolas Ferre" <nicolas.ferre@microchip.com>
Subject: [PATCH] net: macb: disable scatter-gather for macb on sama5d3
Date: Fri, 14 Sep 2018 17:48:10 +0200 [thread overview]
Message-ID: <20180914154811.12090-1-nicolas.ferre@microchip.com> (raw)
Create a new configuration for the sama5d3-macb new compatibility string.
This configuration disables scatter-gather because we experienced lock down
of the macb interface of this particular SoC under very high load.
Signed-off-by: Nicolas Ferre <nicolas.ferre@microchip.com>
---
drivers/net/ethernet/cadence/macb_main.c | 8 ++++++++
1 file changed, 8 insertions(+)
diff --git a/drivers/net/ethernet/cadence/macb_main.c b/drivers/net/ethernet/cadence/macb_main.c
index 16e4ef7d7185..f1a86b422617 100644
--- a/drivers/net/ethernet/cadence/macb_main.c
+++ b/drivers/net/ethernet/cadence/macb_main.c
@@ -3837,6 +3837,13 @@ static const struct macb_config at91sam9260_config = {
.init = macb_init,
};
+static const struct macb_config sama5d3macb_config = {
+ .caps = MACB_CAPS_SG_DISABLED
+ | MACB_CAPS_USRIO_HAS_CLKEN | MACB_CAPS_USRIO_DEFAULT_IS_MII_GMII,
+ .clk_init = macb_clk_init,
+ .init = macb_init,
+};
+
static const struct macb_config pc302gem_config = {
.caps = MACB_CAPS_SG_DISABLED | MACB_CAPS_GIGABIT_MODE_AVAILABLE,
.dma_burst_length = 16,
@@ -3904,6 +3911,7 @@ static const struct of_device_id macb_dt_ids[] = {
{ .compatible = "cdns,gem", .data = &pc302gem_config },
{ .compatible = "atmel,sama5d2-gem", .data = &sama5d2_config },
{ .compatible = "atmel,sama5d3-gem", .data = &sama5d3_config },
+ { .compatible = "atmel,sama5d3-macb", .data = &sama5d3macb_config },
{ .compatible = "atmel,sama5d4-gem", .data = &sama5d4_config },
{ .compatible = "cdns,at91rm9200-emac", .data = &emac_config },
{ .compatible = "cdns,emac", .data = &emac_config },
--
2.15.1
next reply other threads:[~2018-09-14 15:48 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-09-14 15:48 Nicolas Ferre [this message]
2018-09-14 15:48 ` [PATCH] ARM: dts: at91: add new compatibility string for macb on sama5d3 Nicolas Ferre
2018-09-17 14:57 ` David Miller
2018-09-17 14:58 ` [PATCH] net: macb: disable scatter-gather " David Miller
2018-09-17 15:59 ` Nicolas Ferre
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