TX rate problem in hostap mode

[Divacky Roman]

On Tue, Feb 01, 2005 at 02:22:22PM -0800, Sam Leffler wrote:
> Paulo Fragoso wrote:
> >Hi,
> >
> >We are using a Samsung wireless card (PRISM2) with FreeBSD 5.3 in hostap 
> >mode and client is running FreeBSD 5.3 with Orinoco wireless card, all 
> >works fine but tx rate at hostap it is all time in 2Mbps.
> >
> >We found this article for solve this problem with FreeBSD 5.x:
> >
> >http://excamera.com/cgi-bin/blosxom.cgi
> >
> >After modify dev/wi/if_wi.c in the hostap:
> >
> >--- dev/wi/if_wi.c.orig Tue Feb  1 17:15:20 2005
> >+++ dev/wi/if_wi.c      Tue Feb  1 17:58:44 2005
> >@@ -958,6 +958,10 @@
> >                        wi_dump_pkt(&frmhdr, NULL, -1);
> >                fid = sc->sc_txd[cur].d_fid;
> >                off = sizeof(frmhdr);
> >+
> >+               /* tx_rate problem? */
> >+               frmhdr.wi_tx_rate = 110;
> >+
> >                error = wi_write_bap(sc, fid, 0, &frmhdr, 
> >sizeof(frmhdr)) != 0
> >                     || wi_mwrite_bap(sc, fid, off, m0, 
> >m0->m_pkthdr.len) != 0;
> >                m_freem(m0);
> >
> >now we can get files from hostap faster (5x) than before.
> >
> >Both cards (hostap and client) was using mediaopt DS/11Mbps.
> >
> >Is possible ifconfig command change this field when using mediaopt 
> >"DS/11Mbps"?
> 
> Locking the xmit rate at 11Mb/s (or any rate for that matter) isn't a 
> great idea though wi should honor a fixed rate.  I thought Prism cards 
> implemented rate control in the firmware for ap mode but perhaps not. 
> netbsd has xmit rate control support for wi that purportedly does a good 
> job; you might investigate it.  If you come up with changes I'd be 
> interested in integrating them into -current (which could then be 
> brought back to -stable).
> 
> 	Sam

I am working on a port of netbsd rssadapt to fbsd.. its almost complete, expect
PR within a week (I hope)

roman

p.s. you can find the patch (this one has known issues) at: 
hysteria.sk/~neologism/wifi.patch