Re: A reliable port cross-build failure (hangup) in my context (amd64->armv7 cross build, with native-tool speedup involved) [details of a specific qemu-arm-static source code problem]

2018-12-31 Thread Jonathan Chen
On Mon, 31 Dec 2018 at 21:05, Mark Millard  wrote:
[...]
> But if you have a form of hang-up that shows no sign of being tied
> to kevent or hangs-up only sometimes, I'd be surprised if the __packed
> change(s) would fix the issue.

With the __packed-modified qemu-user-static, the amd64->armv7
crossbuilds does not hang anymore, but I get build failures instead.
Interestingly enough, an unmodified qemu-user-static gets further
along in a amd64->armv6 crossbuild, with only one reproducible hang.

Cheers.
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Re: A reliable port cross-build failure (hangup) in my context (amd64->armv7 cross build, with native-tool speedup involved) [details of a specific qemu-arm-static source code problem]

2018-12-31 Thread Jonathan Chen
On Mon, 31 Dec 2018 at 14:34, Mark Millard via freebsd-ports
 wrote:
>
> [Removing __packed did make the size and offsets match armv7
> and the build worked based on the reconstructed qemu-arm-static.]

Thanks for the analysis Mark! I've been suffering quite a few hangups
with my ports crossbuilds on amd64->armv7 on 12-STABLE, and I'll be
trying your suggestions to see whether it resolves the issue.

Cheers.
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Re: Failing to retrieve source tarballs for anything.

2018-09-01 Thread Jonathan Chen
On 2 September 2018 at 05:25, Alex McKeever  wrote:
> After compiling PKG, when I go to ports to compile anything (my eMac can run 
> FreeBSD but not modern Linux due to the version of the Radeon GPU) it fails 
> to retrieve any of the source tarballs for any of the software, desktop 
> environments etc. I would like help to fix this, as I’d like to run something 
> current.
>

How old is your ports tree? It it up to date? What sort of problems
are you seeing in fetching the port sources?

Since no one else has reported any problems, it is most likely
something to do with your local environment.

Cheers.
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Re: Junior Kernel Hacker task: improve vnode-v_tag

2001-09-05 Thread Jonathan Chen

While on the subject of VFS locking...

Accessing devfs through a nullfs redirection causes a panic() due to 
locking issues.  I haven't had time to look at this in detail yet, if 
somebody wants to jump up and fix the problem, feel free...

-Jon

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Re: 3CXFE575CT-JP with NEWCARD doesn't work

2001-09-05 Thread Jonathan Chen

On Mon, Sep 03, 2001 at 08:26:16PM +0900, Yoichi NAKAYAMA wrote:
 I just cvsup'ed and buildkernel with NEWCARD.
 Then my note book doesn't recognize MAC address of the card(3CXFE575CT-JP)
 following are concerning log for new kernel and old kernel(cvsup'ed 2-3 weeks ago)

This looks like it could have been caused by my moving the default io 
range around.  The IO port assigned to your card could be in conflict with 
something else.  Try the following patch, which reverts to the old range.

It would be really nice if the pci bus code could just do these assignments 
automagically...

Index: pccbb.c
===
RCS file: /export/ncvs/src/sys/dev/pccbb/pccbb.c,v
retrieving revision 1.24
diff -u -r1.24 pccbb.c
--- pccbb.c 2001/08/27 11:23:05 1.24
+++ pccbb.c 2001/09/05 15:44:45
@@ -1243,8 +1243,8 @@
start = end = tmp;
break;
case SYS_RES_IOPORT:
-   if (start = 0x1000)
-   start = 0x1000;
+   if (start = 0x3000)
+   start = 0x3000;
if (end  start)
end = start;
break;

-Jon

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Re: 3CXFE575CT-JP with NEWCARD doesn't work

2001-09-05 Thread Jonathan Chen

On Tue, Sep 04, 2001 at 11:25:25AM +0200, Mark Santcroos wrote:
 Hi Warner,
 
 On Mon, Sep 03, 2001 at 10:24:31AM -0600, Warner Losh wrote:
  Looks like the mass commit broke stuff :-(
 
 I have a ToPIC100 chipset in my Toshiba Portege 3110CT.
 
 Last 'week' the updates broke my pcmcia support partially.
 Booting with a card inserted, inserted during boot or inserted after
 booting works fine just as before.
 But if I remove my card, I can't get it to work again without rebooting. The
 code doesnt seem to notice that I remove it, let alone re-insert it again.
 
 I read the printf saying the the support for this card may be broken, so
 it won't surprise you probably.
 
 Note that I tested src/sys/pccard/ from August 20 this morning and
 that worked fine.
 
 Please let me know if I can be of any help debugging/coding this.

A complete dmesg from a verbose boot with both the successful and failed 
attempts would be a good start.  It would also be useful to know what card 
you're using.

-Jon

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Re: more anoncvs servers Re: none

2001-09-05 Thread Jonathan Chen

On Wed, Sep 05, 2001 at 10:54:20AM -0700, John Polstra wrote:
 In article [EMAIL PROTECTED], David O'Brien
 [EMAIL PROTECTED] wrote:
 
  What is the right mailing list to plead for more anoncvs mirrors?
 
 I doubt that pleading would help, but volunteering might. :-)

For occational personal use, you may use
[EMAIL PROTECTED]:/home/ncvs
CVS_RSH=ssh

The none ssh encryption method is available.  You may use it by adding
the appropiate lines to ~/.ssh_config

I'd prefer it if people wouldn't overuse this, otherwise I might have to 
take it away, as the machine has limited bandwidth/resources.  The 
repository syncs via cvsup twice a day.

 - You need an MFS filesystem with zillions of inodes, because
   anonymous CVS just hammers the disk with tiny lock files or state
   files.  If they are on a drive that has moving parts, your system
   will tear itself apart.

setting CVSREADONLYFS to 1 will prevent locking.  This also means you don't 
need to give the anoncvs user write access to the lock directory.  I 
presume this is where most of the anoncvs hogness lies, so this should make 
it go quite a bit faster.

-Jon

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Re: more anoncvs servers Re: none

2001-09-05 Thread Jonathan Chen

On Wed, Sep 05, 2001 at 11:41:13AM -0700, John Polstra wrote:
 In article [EMAIL PROTECTED],
 Jonathan Chen  [EMAIL PROTECTED] wrote:
  On Wed, Sep 05, 2001 at 10:54:20AM -0700, John Polstra wrote:
   - You need an MFS filesystem with zillions of inodes, because
 anonymous CVS just hammers the disk with tiny lock files or state
 files.  If they are on a drive that has moving parts, your system
 will tear itself apart.
  
  setting CVSREADONLYFS to 1 will prevent locking.  This also means you don't 
  need to give the anoncvs user write access to the lock directory.  I 
  presume this is where most of the anoncvs hogness lies, so this should make 
  it go quite a bit faster.
 
 Nope.  Anoncvs.freebsd.org already has/had CVSREADONLYFS set, but
 that did not eliminate the need for the MFS.  If I recall correctly,
 remote CVS creates a shadow checkout tree of CVS/ directories and
 their administrative files for each client.  That's what hammers the
 disk on the server.

Yep, you are right.  cvs writes the shadow stuff in /tmp.  bleah.

-Jon

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Re: cvs commit: src/sys/dev/cardbus cardbus.c cardbus_cis.c cardbus_cis.h cardbusvar.h src/sys/dev/pccard card_if.m pccard.c pccardvar.h src/sys/dev/pccbb pccbb.c pccbbvar.h src/sys/sys rman.h

2001-08-28 Thread Jonathan Chen

On Tue, Aug 28, 2001 at 12:07:10PM +0200, Michael Reifenberger wrote:
 On Mon, 27 Aug 2001, Jonathan Chen wrote:
 ...
  The fix I committed this morning should get around these issues.  Please
  tell me if you run into any more problems.
 This works (now) for supported card like my ep0 (3COM...) but reboots for
 unsupported cards like my sandisk-smartmedia etc.. Is this by intention?
 
 My /etc/pccard.conf entries for this cards are:

No, that is not by intention, nor can I tell what is wrong.  I've tried 
sticking in unknown cards without ill effect.  What would be helpful is if 
you supplied at least the panic message, and a backtrace when the panic 
occues.  Or if this is a spontaneous reboot (which I really doubt), the 
dmesg from a verbose boot up to the point of reboot would be a first 
step...

Also, /etc/pccard.conf is not used with newcard.  You are using newcard, 
right?

-Jon

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Re: cvs commit: src/sys/dev/cardbus cardbus.c cardbus_cis.c cardbus_cis.h cardbusvar.h src/sys/dev/pccard card_if.m pccard.c pccardvar.h src/sys/dev/pccbb pccbb.c pccbbvar.h src/sys/sys rman.h

2001-08-28 Thread Jonathan Chen

On Wed, Aug 29, 2001 at 01:05:30AM +0200, Michael Reifenberger wrote:
 On Tue, 28 Aug 2001, Jonathan Chen wrote:
 ...
  No, that is not by intention, nor can I tell what is wrong.  I've tried
  sticking in unknown cards without ill effect.  What would be helpful is if
  you supplied at least the panic message, and a backtrace when the panic
  occues.  Or if this is a spontaneous reboot (which I really doubt), the
  dmesg from a verbose boot up to the point of reboot would be a first
  step...
 
 The boot message is attached in boot.txt.
 The backtrace is following tomorrow ( hopefully  after building a new kernel)

That won't be necessary.  I now know what causes the panic.  Actually, 
that's not really important.  There's something strange going on with the 
second non-ep card insertion.  Is this a memory card you're trying to use?

-Jon

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Re: Userbase of -current

2001-08-21 Thread Jonathan Chen

On Sun, Aug 19, 2001 at 08:27:21AM -1000, Vincent Poy wrote:
  Or, simply unplug the harddrive from your laptop and plug it into another
  machine to do the install.  When I fubar'ed my laptop's fs not too long
  ago, I hot-plugged my laptop harddrive into my desktop, issued an
  atacontrol reinit, and proceeded to merrily run sysinstall under a
  chroot.  Of course, this is by no means the proper way, but it gets the
  job done...
 
   This idea will work since I can always use the notebook hDD with
 the adapter to the desktop but what does the atacontrol reinit do exactly
 since couldn't I just do a fresh install and just move the drive?

atacontrol allows for hot-swapping of ata devices. Don't worry about it if 
you just plan on installing the laptop drive and turning on the computer.  
It'll act like any other normal drive.

-Jon

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Re: Userbase of -current

2001-08-19 Thread Jonathan Chen

On Sat, Aug 18, 2001 at 05:56:19PM -1000, Vincent Poy wrote:
   Speaking about -current and laptops, I know Warner mentioned the
 3COM 3CXFEM656C working in -current but what's the proper way to install
 FreeBSD on a IBM ThinkPad 770Z with that NIC/Modem combo since the floppy
 disks don't seem to show the card on a 6162001 snapshot from
 current.FreeBSD.ORG.  I was thinking about making a CD of the snapshot but
 is there a bootable ISO available?


The FreeBSD boot floppies do not support NEWCARD.  I could perhaps look
into generating a newcard-kernel.flp once 4.4 is released and
current.freebsd.org is fixed, if people thing that it's a good idea.  But
for now, you can either install FreeBSD from a DOS partition, or IIRC
current.jp.freebsd.org generates bootable ISO's of -current.  But I can't
seem to connect right now so I can't check...

Or, simply unplug the harddrive from your laptop and plug it into another 
machine to do the install.  When I fubar'ed my laptop's fs not too long 
ago, I hot-plugged my laptop harddrive into my desktop, issued an 
atacontrol reinit, and proceeded to merrily run sysinstall under a 
chroot.  Of course, this is by no means the proper way, but it gets the 
job done...

-Jon


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Re: NEWCARD support for aironet driver an(4) (kern/24854)

2001-08-18 Thread Jonathan Chen

On Fri, Aug 17, 2001 at 01:11:03AM -0700, Sam Habash wrote:
 Any good reason why the the patch in this PR hasn't yet been
 committed to the tree?  

Can you clearify exactly what the problem is under newcard?  Or is it just 
not supporting the newcard interface?  I'm using my aironet (340) card 
under newcard without any problems.  Of course, I'm running a patched 
newcard which fixes the reinsertion problem.  (available at 
http://people.freebsd.org/~jon/newcard.patch.3)  I'll get that committed 
when I get it mostly style(9) complient.

Incidentally, does anyone know of a place which sells the LMC352 (pccard 
version of the 350 without built in antenna) in units of one at a 
reasonable price?  I'm using the LMC342 right now and could almost kill for 
the increased power.  But all the online stores I've seen either don't 
carry them or sells them in packs of 20...

-Jon

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vty numbering with devfs

2001-07-08 Thread Jonathan Chen

Pre-DEVFS, vty's were named ttyv0-ttyvf, ttyv10-ttyv1f, etc.  When DEVFS is 
used, the vty's are numbered base-36 instead of base-16.  This breaks X if 
the first 16 tty's are in use.  What I want to know is whether we intended 
to implement this new scheme of tty numbering (to be consistant across all 
devices perhaps?) or whether this change was unintended.  Either case, this 
should be a quick fix in either syscons or X.

(Yes, I'm one of those loons who use 36 vty's)

-Jon

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Re: Cardbus woes

2000-12-27 Thread Jonathan Chen

On Thu, Dec 14, 2000 at 12:47:51PM -0800, John Baldwin wrote:
 In other news, while wandering through the cardbus code, I discovered that
 pccbb softc's have an internal mutex much to my surprise, and that they weren't
 quite being used properly AFAICT.  In the pccb0 kthread, they were
 acquired/released without Giant.  However, in the rest of the pccbb driver,
 they are acquired/released with Giant.  This leads to lock order violations 
 which could potentially deadlock the machine at some point.  Also, the pccbb0
 kthread holds the mutex across the entire card insertion and removal events,
 which is not quite right.  Mutexes should only be held for short periods of
 time.  As such, I've futzed around with the mutex operations in the pccbb
 driver some.  It may not be completely correct, but I think it is an
 improvement.  The patch for this can be found at
 http://www.FreeBSD.org/~jhb/patches/pccbb.patch.

[I just now recalled your mentioning this a while back, so here's my much
delayed response]

Originally I had write the code with spl's, and at one point decided to
convert them to mutex after finding spl's don't do anything.  However, I
don't claim to know a whole lot about mutexes or FreeBSD's implementation
of it.  Perhaps someone can point me to the Great Definitive Source?

The first thing I'm unclear about is the deal with Giant.  My understanding
is that Giant is something one would acquire if he wanted to be really
exclusive, or something like that.  John - you mentioned I was
acquiring/releasing with/without Giant - but I don't see how I'm doing
things differently in and out of the kthread.  The only place I mentioned
Giant was right before kthread_exit, and that's necessary least
kthread_exit calls panic() on me.  On your patch, you acquire Giant at the
start of the kthread - wouldn't that hold onto the lock until the thread
exits, and make other things attempting to lock Giant block?

As for the 'holding onto mutex for a long time' problem, I'm not sure if
your solution is best.  I originally put in the locks firstly because
that's how NetBSD had it, and secondly so that card removal interrupts
while card is still attaching wouldn't be lost.  Your patched version
allows for wakeup() to be called while insertion/removal is being
processed.  I've glanced through the code and didn't see anything that
requires mutual exclusivity between the kthread the the interrupt handler,
so perhaps a better solution would be to simply not use mutex at all?

Comments?

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Re: Getting at cardbus CIS data from inside drivers

2000-11-27 Thread Jonathan Chen

On Tue, Nov 21, 2000 at 01:28:46PM -0700, Justin T. Gibbs wrote:
 That's what I mean.  You call this, and it will remap the CIS (if it
 has been unmapped), walk it for you and pass you a pointer to each CIS
 entry one at a time to the function you specify.
 
 Warner
 
 I'd rather have a seek/read interface than have a callback.

As I see it, there are several ways this can be implemented, with several
issues to consider.
1) How is the information passed?
   a) callback
   b) driver code calling cardbus_get_cistuple(dev, tuplenum)
2) When is the information passed?
   a) before probe (for callback)
   b) between probe and attach (for callback)
   c) automatically after attach (for callback)
   d) when child requests (for either)
3) When is the information read?
   a) Once when CIS is read and parsed initially by the bridge, and once
  when it's time to pass the info to child.
   b) Only once when CIS is read and parsed initially by the bridge.  CIS
  info is stored in malloc'ed kernel memory
   c) This point may be moot if the cardbus bus does not read CIS, or if
  the bridge reading/parsing CIS step is delayed.

Personally, I am somewhat torn between using callback or not, but I'm
leaning more towards using an interface like cardbus_get_cistuple().
The reasoning behind this is that we may not know when, if ever, a driver
would need CIS data.  It might need this information in the probe code
(unlikely for correctly implemented cardbus hardware and driver set, but
IMHO we should keep the interface for cardbus and pccard the same, and
pccard drivers might need this functionality)  Having callbacks before
attach that are actually useful might introduce a whole lot of messiness we
don't need.

As for point 3, I think that we should read the CIS prior to probe or
attach of the child driver, and save the information in memory.  My
reasoning is that we can't be sure whether we can map and read the CIS
after the driver is in control.  For all we know the hardware might have
been put into some mode where CIS reading would be turned off.  True a
driver programmer can get around that, but why not just stick it in the
ivars to begin with?

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Re: Cardbus fixes

2000-11-20 Thread Jonathan Chen
d allow the resource manager to allocate
 a range that doesn't appear to overlap with another allocation but
 does due to the bridges constraints.  I might look into adding the
 concept of hierarchical resource pools to the resource manager so
 that, for example, the cardbus bridges pool will always grow in
 4K increments from its parent resource pool.  The parent would then
 grow according to its own requirements, etc.

This will be very cool...

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Re: My Cardbus and Xircom Realport Ethernet II 10/100 experience...

2000-10-23 Thread Jonathan Chen

On Mon, Oct 23, 2000 at 10:17:06PM +0200, Ron Klinkien wrote:
 I run FreeBSD 5.0 on my Compaq Presario 1246 laptop
 including an Xircom Realport Ethernet II 10/100 cardbus card.
 
 My kernel includes:
 device cardbus
 device pccbb
 device xe

 [snip dmesg]

 According to files in /usr/src/sys/dev/xe/* the card is supported by the xe
 driver.
 
 What to do to get this card working? I have the feeling I got real close...

Use device dc and miibus instead.  The xe driver only support the 16bit
version of the Realport.

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Re: fxp suspend/resume hangs

2000-09-17 Thread Jonathan Chen

On Sun, Sep 17, 2000 at 05:31:45AM -0700, David Greenman wrote:
 in summary: PR kern/18756 contains a patch (against -stable, alas,
 sorry) which fixes kernel hangs in the fxp driver on some laptops
 after a resume from suspend.  while quite a few people appear to be
 using this patch successfully, it hasn't been committed -- david
 greenman had an entirely reasonable objection to one aspect of the
 patch's behavior.
 
 unfortunately, my knowledge of the kernel isn't sufficient to
 adequately address david's concerns, and though i've mailed him to
 ask for guidance twice over the past 4 months, i haven't received a
 response.  that's probably my fault, i probably should have been
 mailing -current to being with.
 
I can only find the 5/22 email regarding this, so I seem to have missed
 your second message. With over a thousand emails a day coming into my inbox,
 this shouldn't be too surprising. My response to the 5/22 message was this:
 
 ...
  This could be a problem. If an interrupt occurs, it must be acknowledged
   otherwise you'll be stuck in an infinit loop - PCI interrupts are level
   sensitive and must be cleared in the ISR.
 ...
 
In short, while it may fix a hang in your laptop case, it opens the driver
 up to a hang if an unexpected interrupt occurs while IFF_RUNNING is clear. I
 think this is dangerous enough that I don't think the code should not be
 compiled as part of the standard driver. One just cannot ignore level-
 sensitive PCI interrupts.

While programming for cardbus under FreeBSD, I ran into similar issues that
when cards were powere down or removed where they would go into an infinite
loop reading status registers.  What actually happens is the register
returns 0x whenever it is read, and the resolution I used was to
check whether it is equal to 0x and do appropiate measures when it is
found to be true.  It looks from reading the PR that this might be a
similar issue here -- that the card is powered down during suspend and of
wakeup the reads to FXP_CSR_SCB_STATACK and cbp-cb_status returns 0xff.  I
believe this issue can be resolved by checking whether what was read equals
0x and abort the loop.  This should be fairly safe as interrups
shouldn't happen during powerdown (and can't be ack'ed anyway)...

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Re: DPT revision....(broken drivers in -STABLE)

2000-08-26 Thread Jonathan Chen

On Wed, Aug 23, 2000 at 01:51:16PM -0500, Visigoth wrote:

   Sorry for the cross post but
 
   Would it be possible to revert the DPT commits made by peter on
 Mon Aug 7 18:48:14 2000 in the RELENG_4 branch?  It seems that the
 dpt_attatch is failing in bus_alloc_resource(9) for the IRQ, and I have
 production machines that need worlds built for some other updates as
 well..  I would be happy to install a -CURRENT machine and help debug
 until it works, but for right now, there is NO DPT support in -STABLE for 
 the DPT PM3334UW. I had a pr started, but haven't been able to get any
 response from the current maintainer.
 
   I am going to install a -CURRENT machine with a DPT in it and
 start the process of working on the issue, but it would be nice if we can
 keep -STABLE stable... ;)

I just updated on my -STABLE machine and ran into the same exact problem.
I also have on the machine SMP with APIC.  The fix for this problem is
simple:

Index: dpt_pci.c
===
RCS file: /export/ncvs/src/sys/dev/dpt/dpt_pci.c,v
retrieving revision 1.17.2.1
diff -u -r1.17.2.1 dpt_pci.c
--- dpt_pci.c   2000/08/07 18:48:14 1.17.2.1
+++ dpt_pci.c   2000/08/26 21:40:26
@@ -106,7 +106,7 @@
}
 
rid = 0;
-   irq = bus_alloc_resource(dev, SYS_RES_IRQ, rid, 0, ~0, 1, RF_ACTIVE);
+   irq = bus_alloc_resource(dev, SYS_RES_IRQ, rid, 0, ~0, 1, RF_ACTIVE | 
+RF_SHAREABLE);
if (!irq) {
device_printf(dev, "No irq?!\n");
error = ENOMEM;

(Everybody in unison, say "Doh!")
Since this didn't change in the past two months, I'm guessing this was
caused by somebody else futzing with APIC.  In any case, I don't see why
the DPT card shouldn't be allowed to share IRQs, and I'm now running the
latest -STABLE on my DPT card.

PS. Sorrry Matt for foiling your evil plot to get a free RAID card. ;)

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Re: 3C589 problems (was: 4.0 code freeze scheduled for Jan 15th)

2000-01-09 Thread Jonathan Chen

On Sun, Jan 09, 2000 at 09:26:45PM -0700, Warner Losh wrote:
 [[ Moved to just current ]]
 
 In message [EMAIL PROTECTED] Greg Lehey writes:
 : That may be the answer for Darren's problem.  It's definitely not the
 : case for the ones we have been discussing on -mobile.
 
 There are definitely known issues with the ep0 driver.  Right now it
 doesn't interrupt quite right on Rx packets.  That's the majority of
 the problems in current driver, at least with the 3c589D that I have.
 I see only about 150kBps from the card.  I've not had time to deal
 with looking for this problem.

With what little pccard/ethernet programming experiences I've had, this
problem seems to be caused by the interrupt for the card getting lost
somewhere before getting processed by the handler.  The reason you still
get traffic is because of the watchdog.  (Try uncommenting the commented
out lines in sys/dev/ep/if_ep.c in the function ep_if_watchdog(), you
should start seeing lots of kernel messages saying "ep: watchdog".) After
looking briefly at the ep files, I saw something that doesn't seem right.  
In sys/dev/ep/if_ep_pccard.c around line 176, there's a comment that says
"Fake IRQ must be 3".  Now maybe the card requires it, or maybe the
original author just didn't have anything on IRQ 3, I don't know.  So, I'd
suggest turning off com2 or whatever you have on irq3, -or- change the
"fake irq" to something else you do have free on the next line (ie, 
0x3000- 0xa000 if you have IRQ10 free).  If this works, great... if not, I
hope Warner gets some more free time. ;)

As for the other problem with collisions, I did a search on the word
collision on sys/dev/ep/if_ep.c, and found only one mention at around line
620.  The comment says "TXS_MAX_COLLISION - we shouldn't get here".  I
suspect it does get there, so I suggest putting a printf there to find out.
I also suspect that the card may require a reset or some other stuff if and
when it "gets there".  If that's the case, someone else with the specs on
the 589 cards can look that up and do it.

(I'll have to admit, I looked only briefly, and know virtually nothing
about how the pccard stuff works on freebsd, have no ep card, nor ever
looked at the documentation for it, so what just said may be completely
wrong -- don't be surprised if it doesn't work.)

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