Date: Tue, 8 Jul 2003 22:22:05 -0400 From: news+freebsd_hackers@news.styx.org To: abkonstantinov@earthlink.net Cc: freebsd-hackers@freebsd.org Subject: DMA issues (Was Re: lpt0 - device busy) Message-ID: <20030709022205.GK12955@styx.org> In-Reply-To: <20030709014153.GA5165@andruxa.sytes.net> References: <20030709014153.GA5165@andruxa.sytes.net>
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FWIW, I have similar symptoms with 5.1. Worse in fact.
Nothing that does DMA (which includes the parallel
port in ECP mode) functions correctly on this VIA C3
board.
Disks running PIO4 -- it is necessary to turn off
UDMA in the BIOS for 5.1 to boot (5.0 boots ok off the CD)
Strangely, the disk shows up in the dmesg as supporting
UDMA. Not sure which interface is being used in reality.
The cdrom drive acting *really* weird -- skipping all
over the place, then locking up -- if I try to access
any audio data. For example, booting and logging in with
an audio CD in the drive causes a very unpleasant
reaction when the KDE desktop gunk tries to see what
sort of disc is in the drive...
I'm on a very slow network connection right now,
so I haven't tried updating my source from CVS.
I believe the DMA problems have been mentioned on
the freebsd-hardware list recently, specifically
relating to the IDE subsystem. I believe that
someone was working on an improved IDE driver that
didn't have this problem. I'm not sure if the fix
is general enough make DMA work properly for the
printer port also.
As well, I believe the CPU should be running at
1GHz, but it looks like 666MHz from the dmesg
(and feels like it too).
Can anyone offer any elucidations about the status
of FreeBSD on this sort of hardware?
Dmesg follows.
Cheers,
-w
Copyright (c) 1992-2003 The FreeBSD Project.
Copyright (c) 1979, 1980, 1983, 1986, 1988, 1989, 1991, 1992, 1993, 1994
The Regents of the University of California. All rights reserved.
FreeBSD 5.1-RELEASE #1: Fri Jul 4 22:15:26 GMT 2003
ww@parc.styx.org:/usr/obj/export/FreeBSD/src/sys/PARC
Preloaded elf kernel "/boot/kernel/kernel" at 0xc070a000.
Preloaded elf module "/boot/kernel/acpi.ko" at 0xc070a244.
Timecounter "i8254" frequency 1193182 Hz
Timecounter "TSC" frequency 667815180 Hz
CPU: VIA C3 Samuel 2 (667.82-MHz 686-class CPU)
Origin = "CentaurHauls" Id = 0x672 Stepping = 2
Features=0x803035<FPU,DE,TSC,MSR,MTRR,PGE,MMX>
real memory = 528416768 (503 MB)
avail memory = 504606720 (481 MB)
npx0: <math processor> on motherboard
npx0: INT 16 interface
acpi0: <VIA601 AWRDACPI> on motherboard
pcibios: BIOS version 2.10
Using $PIR table, 6 entries at 0xc00fdc70
acpi0: power button is handled as a fixed feature programming model.
Timecounter "ACPI-fast" frequency 3579545 Hz
acpi_timer0: <24-bit timer at 3.579545MHz> port 0x4008-0x400b on acpi0
acpi_cpu0: <CPU> on acpi0
acpi_button0: <Power Button> on acpi0
pcib0: <ACPI Host-PCI bridge> port 0x6000-0x607f,0x5000-0x500f,0x4080-0x40ff,0x4
000-0x407f,0xcf8-0xcff on acpi0
pci0: <ACPI PCI bus> on pcib0
agp0: <VIA Generic host to PCI bridge> mem 0xd0000000-0xd3ffffff at device 0.0 o
n pci0
pcib1: <PCI-PCI bridge> at device 1.0 on pci0
pci1: <PCI bus> on pcib1
pci1: <display, VGA> at device 0.0 (no driver attached)
isab0: <PCI-ISA bridge> at device 7.0 on pci0
isa0: <ISA bus> on isab0
atapci0: <VIA 82C686B UDMA100 controller> port 0x9000-0x900f at device 7.1 on pc
i0
ata0: at 0x1f0 irq 14 on atapci0
ata1: at 0x170 irq 15 on atapci0
uhci0: <VIA 83C572 USB controller> port 0x9400-0x941f irq 11 at device 7.2 on pc
i0
usb0: <VIA 83C572 USB controller> on uhci0
usb0: USB revision 1.0
uhub0: VIA UHCI root hub, class 9/0, rev 1.00/1.00, addr 1
uhub0: 2 ports with 2 removable, self powered
ums0: Logitech USB-PS/2 Optical Mouse, rev 2.00/11.10, addr 2, iclass 3/1
ums0: 3 buttons and Z dir.
pci0: <bridge, PCI-unknown> at device 7.4 (no driver attached)
pci0: <multimedia, audio> at device 7.5 (no driver attached)
cbb0: <RF5C475 PCI-CardBus Bridge> mem 0xd8404000-0xd8404fff irq 12 at device 8.
0 on pci0
cardbus0: <CardBus bus> on cbb0
pccard0: <16-bit PCCard bus> on cbb0
dc0: <ADMtek AN985 10/100BaseTX> port 0xbc00-0xbcff mem 0xd8403000-0xd84033ff ir
q 10 at device 9.0 on pci0
dc0: Ethernet address: 00:50:bf:fe:68:d6
miibus0: <MII bus> on dc0
ukphy0: <Generic IEEE 802.3u media interface> on miibus0
ukphy0: 10baseT, 10baseT-FDX, 100baseTX, 100baseTX-FDX, auto
pci0: <simple comms> at device 10.0 (no driver attached)
rl0: <RealTek 8139 10/100BaseTX> port 0xc000-0xc0ff mem 0xd8406000-0xd84060ff ir
q 11 at device 14.0 on pci0
rl0: Realtek 8139B detected. Warning, this may be unstable in autoselect mode
rl0: Ethernet address: 00:07:95:58:8b:75
miibus1: <MII bus> on rl0
rlphy0: <RealTek internal media interface> on miibus1
rlphy0: 10baseT, 10baseT-FDX, 100baseTX, 100baseTX-FDX, auto
fdc0: <Enhanced floppy controller (i82077, NE72065 or clone)> port 0x3f7,0x3f0-0
x3f5 irq 6 drq 2 on acpi0
fdc0: FIFO enabled, 8 bytes threshold
fd0: <1440-KB 3.5" drive> on fdc0 drive 0
sio0 port 0x3f8-0x3ff irq 4 on acpi0
sio0: type 16550A
ppc0 port 0x778-0x77b,0x378-0x37f irq 7 drq 3 on acpi0
ppc0: SMC-like chipset (ECP/EPP/PS2/NIBBLE) in COMPATIBLE mode
ppc0: FIFO with 16/16/8 bytes threshold
ppbus0: <Parallel port bus> on ppc0
plip0: <PLIP network interface> on ppbus0
lpt0: <Printer> on ppbus0
lpt0: Interrupt-driven port
ppi0: <Parallel I/O> on ppbus0
atkbdc0: <Keyboard controller (i8042)> port 0x64,0x60 irq 1 on acpi0
atkbd0: <AT Keyboard> flags 0x1 irq 1 on atkbdc0
kbd0 at atkbd0
orm0: <Option ROMs> at iomem 0xcc000-0xd17ff,0xc0000-0xcbfff on isa0
pmtimer0 on isa0
sc0: <System console> at flags 0x100 on isa0
sc0: VGA <16 virtual consoles, flags=0x300>
sio1: configured irq 3 not in bitmap of probed irqs 0
sio1: port may not be enabled
vga0: <Generic ISA VGA> at port 0x3c0-0x3df iomem 0xa0000-0xbffff on isa0
Timecounters tick every 10.000 msec
ipfw2 initialized, divert enabled, rule-based forwarding enabled, default to den
y, logging limited to 1 packets/entry by default
IPsec: Initialized Security Association Processing.
acpi_cpu: throttling enabled, 2 steps (100% to 50.0%), currently 100.0%
ad0: 76319MB <WDC WD800JB-00ETA0> [155061/16/63] at ata0-master UDMA100
acd0: CDROM <HL-DT-ST CD-ROM GCR-8520B> at ata0-slave PIO4
Mounting root from ufs:/dev/ad0s1a
pcm0: <VIA VT82C686A> port 0xa400-0xa403,0xa000-0xa003,0x9c00-0x9cff irq 3 at de
vice 7.5 on pci0
pcm0: <ICEnsemble ICE1232 AC97 Codec>
On Tue, Jul 08, 2003 at 06:41:53PM -0700, Andrew Konstantinov wrote:
> Hello,
>
> I have a problem accessing lpt0 device node. Whenever I do 'echo "check" > /dev/lpt0' it responds with "/dev/lpt0: Device busy" but at the same time 'fstat' doesn't show that any application is currently using that device. I asked about this issue on #freebsd @ efnet and someone said that this behavior is caused by a bug in the code. It seems that I am not the only one who confronted this problem according to google. Is it really a bug or is it a problem with my system's configuration? I run FreeBSD 5.1 and my kernel is configured with ppc, ppbus, lpt, and ppi devices.
>
> Thank you in advance.
> _______________________________________________
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