Date: Sun, 23 Sep 2001 16:59:21 -0800 From: "Lars Eggert" <larse@ISI.EDU> To: "Michael Collette" <metrol@earthlink.net>, "Warner Losh" <imp@harmony.village.org> Cc: "FreeBSD" <freebsd-mobile@FreeBSD.ORG> Subject: RE: Same old pccard probs Message-ID: <PCELJJEJJMODEMKEBLLBIEDGCAAA.larse@isi.edu> In-Reply-To: <20010923232520.1DEF737B438@hub.freebsd.org>
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[-- Attachment #1 --] Sorry, couldn't find this in the thread - is this a Linksys card? If so, this patch might help: [This is from a -stable email from 11/30/00 titled "Re: Linksys PCMPC100 problem"] Another piece to the puzzle of bad network performance of the Linksys cards is that they're only supported as generic NE2000 cards with 8K of memory by the ed driver. 1.5K are used for the send buffer, 6.5K remain for the receive buffer. This is a shortcoming of the ed driver, since the Linksys cards have 32K of memory. If a sender sends large packets to a Linksys cards (NFS over UDP), the IP fragments arrive too fast and overrun the buffer. The last fragment(s) are lost and the wohle packet is dropped. The patch below fixes a small bug in the ed driver that causes only 8K instead of 16K (as normal for 16bit cards) to be used. However, full support for the Linksys cards should really be added to the ed driver. The code in http://www.FreeBSD.org/cgi/query-pr.cgi?pr=12088 looks promising, but doesn't apply cleanly due to bitrot. Index: if_ed.c =================================================================== RCS file: /home/larse/CVSROOT/RELENG_4/sys/dev/ed/if_ed.c,v retrieving revision 1.1.1.1 diff -u -r1.1.1.1 if_ed.c --- if_ed.c 2000/10/25 01:15:38 1.1.1.1 +++ if_ed.c 2000/11/30 22:16:13 @@ -1046,6 +1046,18 @@ } + /* + * Hack: + * Reprobe Linksys. This sets sc->isa16bit, which causes 16K + * of the card memory to be used instead of only 8K. However, + * the Linksys cards (at least my PCMPC100) have 32K memory. + * This driver should really be changed to fully support the + * Linksys cards. The patch in + * http://www.FreeBSD.org/cgi/query-pr.cgi?pr=12088 looks + * promising, but doesn't apply cleanly due to bitrot. + */ + ed_get_Linksys(sc); + /* 8k of memory plus an additional 8k if 16bit */ memsize = 8192 + sc->isa16bit * 8192; @@ -1690,6 +1702,13 @@ printf("%s\n", (((sc->vendor == ED_VENDOR_3COM) || (sc->vendor == ED_VENDOR_HP)) && (ifp->if_flags & IFF_ALTPHYS)) ? " tranceiver disabled" : ""); +#if ED_DEBUG + printf("%s%d: %u/%u/%u bytes tx/rx/total card memory\n", + ifp->if_name, ifp->if_unit, + sc->txb_cnt * ED_PAGE_SIZE * ED_TXBUF_SIZE, + (sc->rec_page_stop - sc->rec_page_start) * ED_PAGE_SIZE, + sc->mem_size); +#endif return (0); } -- Lars Eggert <larse@isi.edu> Information Sciences Institute http://www.isi.edu/larse/ University of Southern California [-- Attachment #2 --] 0 *H 01 0 + 0 *H 00 G0 *H 01 0 UZA10U Western Cape10U Cape Town10 U Thawte1 0U Certificate Services1(0&U Personal Freemail RSA 2000.8.300 010824164000Z 020824164000Z0T10 UEggert1 0 U*Lars10U Lars Eggert1 0 *H larse@isi.edu00 *H 0 |\Pw v~~ FDooӦA\- Cˀ4.)&{肋 ,z (ܷر߈T7_'txGH^tt/ҹB8%t<#ֲN V0T0*+e!0 00L2uMyffBNUbNJJcdZ2s0U 0 larse@isi.edu0 U 0 0 *H aJPMՒ ]cѭC+kS+wZ1gY",YT41 j 6:~℩ D~Kؚl=u(ՎM?cF7@}T0)0 0 *H 01 0 UZA10U Western Cape10U Cape Town10U Thawte Consulting1(0&U Certification Services Division1$0"UThawte Personal Freemail CA1+0) *H personal-freemail@thawte.com0 000830000000Z 020829235959Z01 0 UZA10U Western Cape10U Cape Town10 U Thawte1 0U Certificate Services1(0&U Personal Freemail RSA 2000.8.3000 *H 0 32c %E>nx'gڈD)c5*mp<ܮto034qmOe KaU5u'rװ |CBPQ<9TIf - ki N0L0)U "0 0 10UPrivateLabel1-2970U 0 0 U 0 *H so&e4KYbDI j&*b ct mSK8P:l4撜n# KrgPo.X PW Ո9[9}4%MjÑ/<RbH10001 0 UZA10U Western Cape10U Cape Town10 U Thawte1 0U Certificate Services1(0&U Personal Freemail RSA 2000.8.30G0 + e0 *H 1 *H 0 *H 1 010924005921Z0# *H 1gszS|4BK'0X *H 1K0I0 *H 0*H 0+0 *H (0+0 *H 0 +71001 0 UZA10U Western Cape10U Cape Town10 U Thawte1 0U Certificate Services1(0&U Personal Freemail RSA 2000.8.30G0 *H ,䬂]2oSxs`Dm@i{?tGR8Q1wY!i)x| p WPHD_r%G #5+m5j9V`> ]ף=Ny[HX
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