From 0817e99a0fce8cec2604099bbd288b0ce500b6cf Mon Sep 17 00:00:00 2001
From: Nicolas Ferre <nicolas.ferre@microchip.com>
Date: Fri, 14 Sep 2018 17:48:10 +0200
Subject: [PATCH 1/4] net: macb: disable scatter-gather for macb on sama5d3
Git-commit: eb4ed8e2d7fecb5f40db38e4498b9ee23cddf196
Patch-mainline: v4.19-rc5
References: git-fixes
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>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Denis Kirjanov <denis.kirjanov@suse.com>
---
drivers/net/ethernet/cadence/macb.c | 8 ++++++++
1 file changed, 8 insertions(+)
diff --git a/drivers/net/ethernet/cadence/macb.c b/drivers/net/ethernet/cadence/macb.c
index c7e1818c7f5d..c5e0fd5a18e5 100644
--- a/drivers/net/ethernet/cadence/macb.c
+++ b/drivers/net/ethernet/cadence/macb.c
@@ -3187,6 +3187,13 @@ 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,
@@ -3251,6 +3258,7 @@ 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 },
--
2.16.4