Author: blogic Date: 2016-04-26 13:44:00 +0200 (Tue, 26 Apr 2016) New Revision: 49249
Added: trunk/target/linux/cns3xxx/patches-4.4/130-Extend-PCIE_BUS_PEER2PEER-to-set-MRSS-128-to-fix-CNS3xxx-BM-DMA..patch Log: cns3xxx: set both MPS 'and' MRSS to 128 Fixes some DMA issues with this platform. Because this isn't currently accepted, and can potentially disrupt other platforms (as read in commit log), I will leave this cns3xxx specific. Original Patch: https://patchwork.ozlabs.org/patch/600024/ Signed-off-by: Pushpal Sidhu <[email protected]> Added: trunk/target/linux/cns3xxx/patches-4.4/130-Extend-PCIE_BUS_PEER2PEER-to-set-MRSS-128-to-fix-CNS3xxx-BM-DMA..patch =================================================================== --- trunk/target/linux/cns3xxx/patches-4.4/130-Extend-PCIE_BUS_PEER2PEER-to-set-MRSS-128-to-fix-CNS3xxx-BM-DMA..patch (rev 0) +++ trunk/target/linux/cns3xxx/patches-4.4/130-Extend-PCIE_BUS_PEER2PEER-to-set-MRSS-128-to-fix-CNS3xxx-BM-DMA..patch 2016-04-26 11:44:00 UTC (rev 49249) @@ -0,0 +1,23 @@ +--- a/drivers/pci/probe.c ++++ b/drivers/pci/probe.c +@@ -1924,7 +1924,8 @@ static void pcie_write_mrrs(struct pci_d + /* In the "safe" case, do not configure the MRRS. There appear to be + * issues with setting MRRS to 0 on a number of devices. + */ +- if (pcie_bus_config != PCIE_BUS_PERFORMANCE) ++ if (pcie_bus_config != PCIE_BUS_PERFORMANCE && ++ pcie_bus_config != PCIE_BUS_PEER2PEER) + return; + + /* For Max performance, the MRRS must be set to the largest supported +--- a/include/linux/pci.h ++++ b/include/linux/pci.h +@@ -756,7 +756,7 @@ enum pcie_bus_config_types { + PCIE_BUS_DEFAULT, /* ensure MPS matches upstream bridge */ + PCIE_BUS_SAFE, /* use largest MPS boot-time devices support */ + PCIE_BUS_PERFORMANCE, /* use MPS and MRRS for best performance */ +- PCIE_BUS_PEER2PEER, /* set MPS = 128 for all devices */ ++ PCIE_BUS_PEER2PEER, /* set MPS and MRSS to 128 for all devices */ + }; + + extern enum pcie_bus_config_types pcie_bus_config; _______________________________________________ openwrt-commits mailing list [email protected] https://lists.openwrt.org/cgi-bin/mailman/listinfo/openwrt-commits
