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authorChristian Lamparter <chunkeey@gmail.com>2018-08-10 23:24:47 +0200
committerJohn Crispin <john@phrozen.org>2018-08-13 08:48:37 +0200
commitf3ffac90bc7266b7d917616f3233f58e8c08a196 (patch)
tree9271943472888de766c6523b0702cba95a03ae51 /target/linux/ath79/files
parent7b1b49bd32199e8d0469efc8c02050dd740b744d (diff)
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ath79: gmac: add parsers for rxd(v)- and tx(d|en)-delay for AR9344
Some AR9344 boards do very poorly with the default settings and need custom rxdv-delay, rxd-delay, txd-delay, txen-delay flags to perform reasonably. In this case the WD My Net Wi-Fi Range Extender can not even manage 10Mbps on a 1Gbit link: root@AR9344:~# iperf3 -s ----------------------------------------------------------- Server listening on 5201 ----------------------------------------------------------- Accepted connection from client [...] [ 5] local [...] connected to client [ ID] Interval Transfer Bitrate [ 5] 0.00-1.00 sec 1.09 MBytes 9.16 Mbits/sec [ 5] 1.00-2.00 sec 895 KBytes 7.33 Mbits/sec [ 5] 2.00-3.00 sec 762 KBytes 6.25 Mbits/sec [...] [ 5] 10.00-10.03 sec 17.0 KBytes 4.74 Mbits/sec - - - - - - - - - - - - - - - - - - - - - - - - - [ ID] Interval Transfer Bitrate [ 5] 0.00-10.03 sec 9.00 MBytes 7.52 Mbits/sec with but with the correct settings in place, it does much better: root@AR9344:~# iperf3 -s ----------------------------------------------------------- Server listening on 5201 ----------------------------------------------------------- Accepted connection from client [...] [ 5] local [...] connected to client [ ID] Interval Transfer Bitrate [ 5] 0.00-1.00 sec 23.1 MBytes 193 Mbits/sec [ 5] 1.00-2.00 sec 23.1 MBytes 194 Mbits/sec [ 5] 2.00-3.00 sec 23.2 MBytes 195 Mbits/sec [...] [ 5] 10.00-10.04 sec 710 KBytes 180 Mbits/sec - - - - - - - - - - - - - - - - - - - - - - - - - [ ID] Interval Transfer Bitrate [ 5] 0.00-10.04 sec 237 MBytes 198 Mbits/sec The tx data and enable delay bits definitions are taken from Atheros' AR9344 Data Sheet Section "8.6.1 Ethernet Configuration (ETH_CFG)" on page 153. Signed-off-by: Christian Lamparter <chunkeey@gmail.com>
Diffstat (limited to 'target/linux/ath79/files')
-rw-r--r--target/linux/ath79/files/drivers/net/ethernet/atheros/ag71xx/ag71xx_gmac.c8
1 files changed, 8 insertions, 0 deletions
diff --git a/target/linux/ath79/files/drivers/net/ethernet/atheros/ag71xx/ag71xx_gmac.c b/target/linux/ath79/files/drivers/net/ethernet/atheros/ag71xx/ag71xx_gmac.c
index 2e5fb3a641..e69abb6438 100644
--- a/target/linux/ath79/files/drivers/net/ethernet/atheros/ag71xx/ag71xx_gmac.c
+++ b/target/linux/ath79/files/drivers/net/ethernet/atheros/ag71xx/ag71xx_gmac.c
@@ -57,6 +57,14 @@ static void ag71xx_setup_gmac_934x(struct device_node *np, void __iomem *base)
ag71xx_of_bit(np, "switch-phy-swap", &val, AR934X_ETH_CFG_SW_PHY_SWAP);
ag71xx_of_bit(np, "switch-only-mode", &val,
AR934X_ETH_CFG_SW_ONLY_MODE);
+ ag71xx_of_set(np, "rxdv-delay", &val,
+ AR934X_ETH_CFG_RDV_DELAY_SHIFT, 0x3);
+ ag71xx_of_set(np, "rxd-delay", &val,
+ AR934X_ETH_CFG_RXD_DELAY_SHIFT, 0x3);
+ ag71xx_of_set(np, "txd-delay", &val,
+ AR934X_ETH_CFG_TXD_DELAY_SHIFT, 0x3);
+ ag71xx_of_set(np, "txen-delay", &val,
+ AR934X_ETH_CFG_TXE_DELAY_SHIFT, 0x3);
__raw_writel(val, base + AR934X_GMAC_REG_ETH_CFG);
}