leandrof/linux
1
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity

ftgmac100: Disable HW checksum generation on AST2400, enable on others

Browse Source 
We found out that HW checksum generation only works from AST2500
onward. This disables it on AST2400 and removes the "no-hw-checksum"
properties in the device-trees. The problem we had wasn't related
to NC-SI.

Also rework the logic testing for that property so it can be used
to disable HW checksum generation and checking regardless of whether
NC-SI is used or not in case other variants out there need this.

Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Benjamin Herrenschmidt 2017-04-12 13:27:03 +10:00 committed by David S. Miller
parent 78d28543a6
commit 6aff0bf641
3 changed files with 6 additions and 10 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

2
arch/arm/boot/dts/aspeed-g4.dtsi
View File

@ -45,7 +45,6 @@
compatible = "aspeed,ast2400-mac", "faraday,ftgmac100";
reg = <0x1e660000 0x180>;
interrupts = <2>;
no-hw-checksum;
status = "disabled";
};
@ -53,7 +52,6 @@
compatible = "aspeed,ast2400-mac", "faraday,ftgmac100";
reg = <0x1e680000 0x180>;
interrupts = <3>;
no-hw-checksum;
status = "disabled";
};

2
arch/arm/boot/dts/aspeed-g5.dtsi
View File

@ -36,7 +36,6 @@
compatible = "aspeed,ast2500-mac", "faraday,ftgmac100";
reg = <0x1e660000 0x180>;
interrupts = <2>;
no-hw-checksum;
status = "disabled";
};
@ -44,7 +43,6 @@
compatible = "aspeed,ast2500-mac", "faraday,ftgmac100";
reg = <0x1e680000 0x180>;
interrupts = <3>;
no-hw-checksum;
status = "disabled";
};

12
drivers/net/ethernet/faraday/ftgmac100.c
View File

@ -1473,15 +1473,15 @@ static int ftgmac100_probe(struct platform_device *pdev)
goto err_setup_mdio;
}
/* We have to disable on-chip IP checksum functionality
* when NCSI is enabled on the interface. It doesn't work
* in that case.
*/
/* Base feature set */
netdev->features = NETIF_F_RXCSUM | NETIF_F_HW_CSUM |
NETIF_F_GRO | NETIF_F_SG;
if (priv->use_ncsi &&
of_get_property(np, "no-hw-checksum", NULL))
/* AST2400 doesn't have working HW checksum generation */
if (np && (of_device_is_compatible(np, "aspeed,ast2400-mac")))
netdev->features &= ~NETIF_F_HW_CSUM;
if (np && of_get_property(np, "no-hw-checksum", NULL))
netdev->features &= ~(NETIF_F_HW_CSUM | NETIF_F_RXCSUM);
/* register network device */
err = register_netdev(netdev);