Re: Re: Re: IDE DMA breakage w/ 2.4.21+ and 2.6.0-test4(-mm4)
From: Petr Baudis
Date: Sun Aug 31 2003 - 15:07:51 EST
Dear diary, on Sun, Aug 31, 2003 at 08:57:06PM CEST, I got a letter,
where Petr Baudis <pasky@xxxxxx> told me, that...
> Dear diary, on Sun, Aug 31, 2003 at 08:32:47PM CEST, I got a letter,
> where Bartlomiej Zolnierkiewicz <B.Zolnierkiewicz@xxxxxxxxxxxxxx> told me, that...
> > On Sunday 31 of August 2003 19:57, Alan Cox wrote:
> > > On Sul, 2003-08-31 at 17:16, Petr Baudis wrote:
> > > > Hello,
> > > >
> > > > when upgrading from 2.4.20 to 2.4.22, I hit a strange problem - the
> > > > machine mysteriously freezed (totally, interrupts blocked) in few seconds
> > > > when I tried to do anything with the soundcard. It turned out to be a DMA
> > > > conflict between soundcard and disk, since it disappears when I disable
> > > > the (now defaultly on) DMA-by-default IDE option.
> > >
> > > Sound and IDE work together on my MVP3 board. Maybe your hardware is
> > > just broken.
> >
> > Or maybe sound driver is doing some funny things (?).
>
> sb: ESS ES1869 Plug and Play AudioDrive detected
> sb: ISAPnP reports 'ESS ES1869 Plug and Play AudioDrive' at i/o 0x220, irq 10, dma 1, 3
> SB 3.01 detected OK (220)
> ESS chip ES1869 detected
> <ESS ES1869 AudioDrive (rev 11) (3.01)> at 0x220 irq 10 dma 1,3
> sb: 1 Soundblaster PnP card(s) found.
>
> ...worked just fine in the past. Oh and under 2.6.0-test I was using ALSA.
I did few more experiments, and one strange thing is that /proc/dma does not
change when turning using_dma on thru hdparm:
1: SoundBlaster8
4: cascade
I'd expect some entry for ide to appear or so. Or is this normal?
When I'm playing something thru the soundcard and turn using_dma in the middle
of the playback, it freezes the first time it tries to do any disk i/o, it
seems.
In case it matters, here is /proc/ide/via :
----------VIA BusMastering IDE Configuration----------------
Driver Version: 3.37
South Bridge: VIA vt82c686a
Revision: ISA 0x1b IDE 0x6
Highest DMA rate: UDMA66
BM-DMA base: 0xd000
PCI clock: 33.3MHz
Master Read Cycle IRDY: 1ws
Master Write Cycle IRDY: 1ws
BM IDE Status Register Read Retry: yes
Max DRDY Pulse Width: No limit
-----------------------Primary IDE-------Secondary IDE------
Read DMA FIFO flush: yes yes
End Sector FIFO flush: no no
Prefetch Buffer: no no
Post Write Buffer: no no
Enabled: yes yes
Simplex only: no no
Cable Type: 40w 40w
-------------------drive0----drive1----drive2----drive3-----
Transfer Mode: PIO PIO PIO PIO
Address Setup: 30ns 120ns 120ns 30ns
Cmd Active: 90ns 90ns 90ns 90ns
Cmd Recovery: 30ns 30ns 30ns 30ns
Data Active: 90ns 330ns 330ns 90ns
Data Recovery: 30ns 270ns 270ns 30ns
Cycle Time: 120ns 600ns 600ns 120ns
Transfer Rate: 16.6MB/s 3.3MB/s 3.3MB/s 16.6MB/s
Settings are:
root@machine:~# cat /proc/ide/ide0/hda/settings
name value min max mode
---- ----- --- --- ----
acoustic 0 0 254 rw
address 0 0 2 rw
bios_cyl 79780 0 65535 rw
bios_head 16 0 255 rw
bios_sect 63 0 63 rw
breada_readahead 8 0 255 rw
bswap 0 0 1 r
current_speed 66 0 70 rw
failures 0 0 65535 rw
file_readahead 124 0 16384 rw
init_speed 12 0 70 rw
io_32bit 1 0 3 rw
keepsettings 0 0 1 rw
lun 0 0 7 rw
max_failures 1 0 65535 rw
max_kb_per_request 128 1 255 rw
multcount 16 0 16 rw
nice1 1 0 1 rw
nowerr 0 0 1 rw
number 0 0 3 rw
pio_mode write-only 0 255 w
slow 0 0 1 rw
unmaskirq 1 0 1 rw
using_dma 0 0 1 rw
wcache 0 0 1 rw
(before doing hdparm -d 1 /dev/hda)
(By the way, there are two 'capacity' entries in /proc/ide/ide*/hd*/.)
I tried to somehow disable the DMA usage in the sound driver or at least
convince it to use dma 3, but I didn't succeed - if I don't let isapnp do the
job, sb fails to reset dsp even if i manually insert the identical stuff that
isapnp autodetected :/ :
root@machine:~# insmod sb
Using /lib/modules/2.4.22/kernel/drivers/sound/sb.o
Soundblaster audio driver Copyright (C) by Hannu Savolainen 1993-1996
sb: ESS ES1869 Plug and Play AudioDrive detected
sb: ISAPnP reports 'ESS ES1869 Plug and Play AudioDrive' at i/o 0x220, irq 10, dma 1, 3
SB 3.01 detected OK (220)
ESS chip ES1869 detected
<ESS ES1869 AudioDrive (rev 11) (3.01)> at 0x220 irq 10 dma 1,3
sb: 1 Soundblaster PnP card(s) found.
root@machine:~# rmmod sb
root@machine:~# insmod sb isapnp=0 io=0x220 irq=10 dma=1
Using /lib/modules/2.4.22/kernel/drivers/sound/sb.o
Soundblaster audio driver Copyright (C) by Hannu Savolainen 1993-1996
sb: dsp reset failed.
/lib/modules/2.4.22/kernel/drivers/sound/sb.o: init_module: No such device
Hint: insmod errors can be caused by incorrect module parameters, including invalid IO or IRQ parameters
root@machine:~# insmod sb isapnp=0 io=0x220 irq=10 dma=1,3
Using /lib/modules/2.4.22/kernel/drivers/sound/sb.o
/lib/modules/2.4.22/kernel/drivers/sound/sb.o: too many values for dma (max 1)
Regards,
--
Petr "Pasky" Baudis
.
Perfection is reached, not when there is no longer anything to add, but when
there is no longer anything to take away.
-- Antoine de Saint-Exupery
.
Stuff: http://pasky.ji.cz/
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