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SubjectRe: IRQ (routing ?) problem [was Re: epic100 in current -ac kernels]
Sorry for the delay, I could not get physical access to the machine
for the last days.

I was able to do some more testing today and found this:
- The problem is not the IRQ /sharing/, after getting rid of all the
other PCI cards, the problem was still there.
- The only thing that seems to have any effect on the symptoms is the
presence of the USB driver, either usb-uhci or uhci. I am not using
USB at all. As described before, the system behaves is either of those
ways:
* epic100 driver without DMA mapping (e.g. 2.4.0-ac9): normal operation
* driver with DMA mapping+USB driver loaded: lots of interrupts -> slow
* driver with DMA mapping, USB driver not loaded: hang after ~2 seconds
- I sometimes get 'spurious interrupt: IRQ7', even though no device is
connected there. Probably not important.

On Sat, 10 Feb 2001, Francois Romieu wrote:

>
> The following informations may help:
> - motherboard type
Asus A7V, onboard USB hub and Promise ATA/100 chip

> - bios revision
Can't see right now, system was bought in October 2000
I think it was 1.004, but I am not sure.

> - lspci -x
see attachment, this was when I ripped out sound, tv and scsi

> - 2.4.2pre3 + whatever recent ac epic100 = ?
Still no improvement until latest -ac (2.4.1-ac13)

Arnd <><


00:00.0 Host bridge: VIA Technologies, Inc.: Unknown device 0305 (rev 02)
Subsystem: Asustek Computer, Inc.: Unknown device 8033
Flags: bus master, medium devsel, latency 0
Memory at e7000000 (32-bit, prefetchable) [size=16M]
Capabilities: [a0] AGP version 2.0
Capabilities: [c0] Power Management version 2
00: 06 11 05 03 06 00 10 22 02 00 00 06 00 00 00 00
10: 08 00 00 e7 00 00 00 00 00 00 00 00 00 00 00 00
20: 00 00 00 00 00 00 00 00 00 00 00 00 43 10 33 80
30: 00 00 00 00 a0 00 00 00 00 00 00 00 00 00 00 00

00:01.0 PCI bridge: VIA Technologies, Inc.: Unknown device 8305 (prog-if 00 [Normal decode])
Flags: bus master, 66Mhz, medium devsel, latency 0
Bus: primary=00, secondary=01, subordinate=01, sec-latency=0
Memory behind bridge: e2800000-e3dfffff
Prefetchable memory behind bridge: e3f00000-e6ffffff
Capabilities: [80] Power Management version 2
00: 06 11 05 83 07 00 30 22 00 00 04 06 00 00 01 00
10: 00 00 00 00 00 00 00 00 00 01 01 00 e0 d0 00 00
20: 80 e2 d0 e3 f0 e3 f0 e6 00 00 00 00 00 00 00 00
30: 00 00 00 00 80 00 00 00 00 00 00 00 00 00 08 00

00:04.0 ISA bridge: VIA Technologies, Inc. VT82C686 [Apollo Super] (rev 22)
Subsystem: Asustek Computer, Inc.: Unknown device 8033
Flags: bus master, stepping, medium devsel, latency 0
00: 06 11 86 06 87 00 10 02 22 00 01 06 00 00 80 00
10: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
20: 00 00 00 00 00 00 00 00 00 00 00 00 43 10 33 80
30: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00

00:04.1 IDE interface: VIA Technologies, Inc. VT82C586 IDE [Apollo] (rev 10) (prog-if 8a [Master SecP PriP])
Flags: bus master, medium devsel, latency 32
I/O ports at d800 [size=16]
Capabilities: [c0] Power Management version 2
00: 06 11 71 05 07 00 90 02 10 8a 01 01 00 20 00 00
10: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
20: 01 d8 00 00 00 00 00 00 00 00 00 00 00 00 00 00
30: 00 00 00 00 c0 00 00 00 00 00 00 00 ff 00 00 00

00:04.2 USB Controller: VIA Technologies, Inc. VT82C586B USB (rev 10) (prog-if 00 [UHCI])
Subsystem: Unknown device 0925:1234
Flags: bus master, medium devsel, latency 32, IRQ 11
I/O ports at d400 [size=32]
Capabilities: [80] Power Management version 2
00: 06 11 38 30 17 00 10 02 10 00 03 0c 08 20 00 00
10: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
20: 01 d4 00 00 00 00 00 00 00 00 00 00 25 09 34 12
30: 00 00 00 00 80 00 00 00 00 00 00 00 0b 04 00 00

00:04.3 USB Controller: VIA Technologies, Inc. VT82C586B USB (rev 10) (prog-if 00 [UHCI])
Subsystem: Unknown device 0925:1234
Flags: bus master, medium devsel, latency 32, IRQ 11
I/O ports at d000 [size=32]
Capabilities: [80] Power Management version 2
00: 06 11 38 30 17 00 10 02 10 00 03 0c 08 20 00 00
10: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
20: 01 d0 00 00 00 00 00 00 00 00 00 00 25 09 34 12
30: 00 00 00 00 80 00 00 00 00 00 00 00 0b 04 00 00

00:04.4 Host bridge: VIA Technologies, Inc. VT82C686 [Apollo Super ACPI] (rev 30)
Flags: medium devsel, IRQ 9
Capabilities: [68] Power Management version 2
00: 06 11 57 30 00 00 90 02 30 00 00 06 00 00 00 00
10: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
20: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
30: 00 00 00 00 68 00 00 00 00 00 00 00 00 00 00 00

00:0c.0 Ethernet controller: Standard Microsystems Corp [SMC] 83C170QF (rev 08)
Subsystem: Standard Microsystems Corp [SMC]: Unknown device a020
Flags: bus master, fast devsel, latency 32, IRQ 10
I/O ports at a400 [size=256]
Memory at e2000000 (32-bit, non-prefetchable) [size=4K]
Expansion ROM at <unassigned> [disabled] [size=64K]
Capabilities: [dc] Power Management version 1
00: b8 10 05 00 07 00 90 00 08 00 00 02 00 20 00 00
10: 01 a4 00 00 00 00 00 e2 00 00 00 00 00 00 00 00
20: 00 00 00 00 00 00 00 00 07 01 00 00 b8 10 20 a0
30: 00 00 00 00 dc 00 00 00 00 00 00 00 0a 01 08 1c

00:11.0 Unknown mass storage controller: Promise Technology, Inc.: Unknown device 0d30 (rev 02)
Subsystem: Promise Technology, Inc.: Unknown device 4d33
Flags: bus master, medium devsel, latency 32, IRQ 5
I/O ports at a000 [size=8]
I/O ports at 9800 [size=4]
I/O ports at 9400 [size=8]
I/O ports at 9000 [size=4]
I/O ports at 8800 [size=64]
Memory at e1800000 (32-bit, non-prefetchable) [size=128K]
Expansion ROM at <unassigned> [disabled] [size=64K]
Capabilities: [58] Power Management version 1
00: 5a 10 30 0d 07 00 10 02 02 00 80 01 00 20 00 00
10: 01 a0 00 00 01 98 00 00 01 94 00 00 01 90 00 00
20: 01 88 00 00 00 00 80 e1 00 00 00 00 5a 10 33 4d
30: 00 00 00 00 58 00 00 00 00 00 00 00 05 01 00 00

01:00.0 VGA compatible controller: Matrox Graphics, Inc. MGA G400 AGP (rev 04) (prog-if 00 [VGA])
Subsystem: Matrox Graphics, Inc.: Unknown device 0378
Flags: bus master, medium devsel, latency 64, IRQ 10
Memory at e4000000 (32-bit, prefetchable) [size=32M]
Memory at e3000000 (32-bit, non-prefetchable) [size=16K]
Memory at e2800000 (32-bit, non-prefetchable) [size=8M]
Expansion ROM at e3ff0000 [disabled] [size=64K]
Capabilities: [dc] Power Management version 2
Capabilities: [f0] AGP version 2.0
00: 2b 10 25 05 07 00 90 02 04 00 00 03 08 40 00 00
10: 08 00 00 e4 00 00 00 e3 00 00 80 e2 00 00 00 00
20: 00 00 00 00 00 00 00 00 00 00 00 00 2b 10 78 03
30: 00 00 ff e3 dc 00 00 00 00 00 00 00 0a 01 10 20

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