kernel/2939: OpenBSD 3.1 fails when using DMA on SIS 5513

From: <joel(at)ionix.com.au>
Date: Tue Oct 01 2002 - 00:12:27 EDT

>Number: 2939
>Category: kernel
>Synopsis: OpenBSD 3.1 fails when using DMA on SIS 5513
>Confidential: no
Ionix Technology Pty Ltd
>Environment:
        

	System      : OpenBSD 3.1
	Architecture: OpenBSD.i386
	Machine     : i386

>Description:

	OpenBSD 3.1 fails to boot on a Gigabyte GA-8ST motherboard (SIS
        5513 IDE controller.) During boot the drive detects correctly,
        however UDMA is not used, instead using PIO mode 4 and DMA mode 2.
        Shortly after the "pctr:..." appears, the following error occurs
        and the system locks:

        wd0(pciide0:0:0): timeout
            type: ata
            c_bcount: 512
            c_skip: 0
        pciide0:0:0 bus-master DMA error: missing interrupt, status=0x21

>How-To-Repeat:
        

	Boot system, without modifying kernel configuration. This may be
        a combination of motherboard/chipset bug and OpenBSD.

	When booted normally the following entry appears for the disk drive:

            wd0(pciide0:0:0): using PIO mode 4, DMA mode 2

        A dmesg from the system (with DMA disabled) is given below:

OpenBSD 3.1 (GENERIC) #59: Sat Apr 13 15:28:52 MDT 2002

    deraadt@i386.openbsd.org:/usr/src/sys/arch/i386/compile/GENERIC cpu0: Intel Pentium 4 ("GenuineIntel" 686-class) 2.42 GHz cpu0: FPU,V86,DE,PSE,TSC,MSR,PAE,MCE,CX8,APIC,SYS,MTRR,PGE,MCA,CMOV,PAT,PSE36,MMX,FXSR,SIMD real mem = 536391680 (523820K)
avail mem = 491536384 (480016K)
using 5689 buffers containing 26923008 bytes (26292K) of memory User Kernel Config
UKC> change 30
 30 wd* at wdc0|wdc1|wdc*|wdc*|pciide* channel -1 flags 0x0

change (y/n) ?
change (y/n) ?
channel [-1] ? 

flags [0] ? 0x0ffc
 30 wd* changed
 30 wd* at wdc0|wdc1|wdc*|wdc*|pciide* channel -1 flags 0xffc UKC> quit
Continuing...
mainbus0 (root)
bios0 at mainbus0: AT/286+(f7) BIOS, date 07/01/02, BIOS32 rev. 0 @ 0xfaa50 apm0 at bios0: Power Management spec V1.2 apm0: AC on, battery charge unknown
pcibios0 at bios0: rev. 2.1 @ 0xf0000/0xd654

pcibios0: PCI IRQ Routing Table rev. 1.0 @ 0xfd5a0/176 (9 entries)
pcibios0: PCI Exclusive IRQs: 3 4 5 7 10 11
pcibios0: PCI Interrupt Router at 000:02:0 ("SIS 85C503 ISA" rev 0x00)
pcibios0: PCI bus #1 is the last bus

bios0: ROM list: 0xc0000/0xcc00
pci0 at mainbus0 bus 0: configuration mode 1 (no bios) pchb0 at pci0 dev 0 function 0 vendor "SIS", unknown product 0x646 rev 0x00 ppb0 at pci0 dev 1 function 0 "SIS 86C201 Host-AGP" rev 0x00 pci1 at ppb0 bus 1
vga1 at pci1 dev 0 function 0 "Nvidia GeForce2 MX" rev 0xb2 wsdisplay0 at vga1: console (80x25, vt100 emulation) wsdisplay0: screen 1-5 added (80x25, vt100 emulation) pcib0 at pci0 dev 2 function 0 "SIS 85C503 ISA" rev 0x04 pciide0 at pci0 dev 2 function 5 "SIS 5513 EIDE" rev 0x00: DMA, channel 0 wired to compatibility, channel 1 wired to compatibility wd0 at pciide0 channel 0 drive 0: <ST340016A> wd0: 16-sector PIO, LBA, 38166MB, 16383 cyl, 16 head, 63 sec, 78165360 sectors wd0(pciide0:0:0): using PIO mode 4
atapiscsi0 at pciide0 channel 1 drive 0
scsibus0 at atapiscsi0: 2 targets
cd0 at scsibus0 targ 0 lun 0: <ATAPI-CD, ROM-DRIVE-52MAX, 52ED> SCSI0 5/cdrom removable cd0(pciide0:1:0): using PIO mode 4, DMA mode 2 rl0 at pci0 dev 15 function 0 "Realtek 8139" rev 0x10: irq 11 address 00:20:ed:42:96:69 rlphy0 at rl0 phy 0: RTL internal phy
isa0 at pcib0
isadma0 at isa0
pckbc0 at isa0 port 0x60/5
pckbd0 at pckbc0 (kbd slot)
pckbc0: using irq 1 for kbd slot
wskbd0 at pckbd0: console keyboard, using wsdisplay0 pms0 at pckbc0 (aux slot)
pckbc0: using irq 12 for aux slot
wsmouse0 at pms0 mux 0
pcppi0 at isa0 port 0x61
midi0 at pcppi0: <PC speaker>
sysbeep0 at pcppi0
npx0 at isa0 port 0xf0/16: using exception 16 fdc0 at isa0 port 0x3f0/6 irq 6 drq 2
fd0 at fdc0 drive 0: 1.44MB 80 cyl, 2 head, 18 sec biomask c040 netmask c840 ttymask d842
pctr: user-level cycle counter enabled
dkcsum: wd0 matched BIOS disk 80
root on wd0a
rootdev=0x0 rrootdev=0x300 rawdev=0x302

>Fix:

	Disable DMA on the wd0 device (flags 0x0ffc) or disable pciide 
        driver. Both of these are unsuitable long term due to decreased 
        system performance.

>Release-Note:
Received on Thu Nov 7 17:01:27 2002