On Dec 29, 2007 8:33 PM, Dag-Erling Smørgrav <des_at_des.no> wrote: > I upgraded my router cum firewall cum access point (soekris net4801 with > a cheap third-party ralink-based wlan adapter) from RELENG_6 to HEAD and > noticed what seems to be a regression in if_ral. After a certain amount > of use (i.e. actually having a client connected to it and transferring > data), the connection falters, and eventually the client can no longer > see even see the access point in a scan. Restarting the interface on > the router (/etc/rc.d/netif restart ral0) fixes it. I now have a cron > job that does this every five minutes. I still get occasional outages, > but all I have to do is wait a few minutes for the cron job to kick in. > > Outages are clearly related to traffic; a sure-fire way to trigger one > is to start a backup job on my laptop (rsync to my file server). I will > lose the wlan connection repeatedly until I either stop trying or run > the script with a bandwidth limit. > > des_at_soe ~% uname -a > FreeBSD soe.des.no 8.0-CURRENT FreeBSD 8.0-CURRENT #0: Sat Dec 15 20:46:29 UTC 2007 des_at_pwd.des.no:/usr/obj/usr/src/sys/soe i386 > des_at_soe ~% kldstat -v > Id Refs Address Size Name > 1 18 0xc0400000 33fdfc kernel (/boot/soe/kernel) > 2 1 0xc0740000 7690 if_sis.ko (/boot/soe/if_sis.ko) > 3 2 0xc0748000 1dbe0 miibus.ko (/boot/soe/miibus.ko) > 4 1 0xc0766000 18e28 if_ral.ko (/boot/soe/if_ral.ko) > 5 4 0xc077f000 2a95c wlan.ko (/boot/soe/wlan.ko) > 6 1 0xc07aa000 2cb0 wlan_acl.ko (/boot/soe/wlan_acl.ko) > 7 1 0xc07ad000 1924 wlan_scan_ap.ko (/boot/soe/wlan_scan_ap.ko) > 8 1 0xc107f000 6000 geom_md.ko (/boot/soe/geom_md.ko) > 9 1 0xc10f9000 2000 pflog.ko (/boot/soe/pflog.ko) > 10 1 0xc10fb000 2f000 pf.ko (/boot/soe/pf.ko) > 11 4 0xc118d000 a000 netgraph.ko (/boot/soe/netgraph.ko) > 12 1 0xc119c000 3000 ng_ether.ko (/boot/soe/ng_ether.ko) > 13 1 0xc11a8000 5000 ng_pppoe.ko (/boot/soe/ng_pppoe.ko) > 14 1 0xc11ad000 4000 ng_socket.ko (/boot/soe/ng_socket.ko) > des_at_soe ~% grep ral0 /var/run/dmesg.boot > ral0: <Ralink Technology RT2560> mem 0xa0004000-0xa0005fff irq 11 at device 10.0 on pci0 I don't whether following thingies will fix your problem: 1) rt2560.c: rt2560_setup_tx_desc() Set RT2560_{TX,TX_CIPHER}_BUSY desc flag at the end of this function, instead of at the beginning of this function. The original way _may_ confuse hardware encryption/tx engine. 2) And the rt2560_bbp_read() is not correct, it should look like following: static uint8_t rt2560_bbp_read(struct rt2560_softc *sc, uint8_t reg) { uint32_t val; int ntries; for (ntries = 0; ntries < 100; ntries++) { if (!(RAL_READ(sc, RT2560_BBPCSR) & RT2560_BBP_BUSY)) break; DELAY(1); } if (ntries == 100) { device_printf(sc->sc_dev, "could not read from BBP\n"); return 0; } val = RT2560_BBP_BUSY | reg << 8; RAL_WRITE(sc, RT2560_BBPCSR, val); for (ntries = 0; ntries < 100; ntries++) { val = RAL_READ(sc, RT2560_BBPCSR); if (!(val & RT2560_BBP_BUSY)) return val & 0xff; DELAY(1); } device_printf(sc->sc_dev, "could not read from BBP\n"); return 0; } 3) After above fix, rt2560_set_txantenna() and rt2560_set_rxantenna() should be called after rt2560_bbp_init(), since above two function touch BBP. NOTE: without above fix, you may burn your card. Even with these in place in dfly, I still have strange TX performance regression in sta mode (drop from 20Mb/s to 3Mb/s under very well condition) on certain hardwares after 20sec~30sec TCP_STREAM netperf testing; didn't have enough time to dig, however, all of the tested hardwares stayed connected during testing (I usually run netperf stream test for 12 hours or more). Best Regards, sephe -- Live Free or DieReceived on Tue Jan 01 2008 - 05:54:39 UTC
This archive was generated by hypermail 2.4.0 : Wed May 19 2021 - 11:39:24 UTC