mr/openwrt
2
0
Fork 1
Code Issues 7 Pull Requests Releases Wiki Activity

mac80211: Improve ath5k/ar71xx PCI bug WAR

Browse Source 
It has been confirmed by Atheros that this PCI bug affects the RX side only,
so we can keep the 128B DMA size for TX.

With this change we can double the thruput of ath5k from 15Mps to 30Mbps.

We have been using this patch since more than 6 month in a production
environment without problems and a significant performance improvement.

It has also been said to fix HW encryption:
http://www.mail-archive.com/ath5k-devel@lists.ath5k.org/msg04311.html

Patch from: kentarou matsuyama <matsuyama@thinktube.com>

SVN-Revision: 25104
This commit is contained in:
Felix Fietkau 2011-01-26 11:33:50 +00:00
parent 5571acdbd0
commit 5903f4a167
1 changed files with 2 additions and 2 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

4
package/mac80211/patches/201-ath5k-WAR-for-AR71xx-PCI-bug.patch
View File

@ -9,7 +9,7 @@
{ AR5K_RXCFG, AR5K_DMASIZE_128B },
+#else
+ /* WAR for AR71xx PCI bug */
+ { AR5K_TXCFG, AR5K_DMASIZE_4B },
+ { AR5K_TXCFG, AR5K_DMASIZE_128B },
+ { AR5K_RXCFG, AR5K_DMASIZE_4B },
+#endif
{ AR5K_CFG, AR5K_INIT_CFG },
@ -29,7 +29,7 @@
+#else
+ /* WAR for AR71xx PCI bug */
+ AR5K_REG_WRITE_BITS(ah, AR5K_TXCFG,
+ AR5K_TXCFG_SDMAMR, AR5K_DMASIZE_4B);
+ AR5K_TXCFG_SDMAMR, AR5K_DMASIZE_128B);
+ AR5K_REG_WRITE_BITS(ah, AR5K_RXCFG,
+ AR5K_RXCFG_SDMAMW, AR5K_DMASIZE_4B);
+#endif