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SubjectRe: [patch] PIIX rewrite patch, pre-final
On Thu, 14 Mar 2002 08:30:38 +0100, Vojtech Pavlik wrote:

>> Are you aware of the batches of broken PIIX3 chips ?
>
>I don't know of any IDE-related errata for the PIIX3 chip. At least
>Intel didn't publish any and there doesn't seem to be any workarounds in
>the original piix.c code, only a statement stating that the PIIX3 UDMA
>is broken, however, as far as I know, PIIX3 isn't UDMA capable at all.
>
>(Hmm, perhaps some BIOSes enable UDMA on PIIX3, that'd explain it ...
>though I believe that's quite improbable).
>
>In what way are those batches broken?

Have a look at the table below which summarizes my findings from personal experiences,
user reports and manufacturer info, accumulated in my 3 years of writing IDE drivers
(well, actually only one - it's an universal driver).

The PIIX3 bug is real, I have several user reports about it!

Ciao,
Dani


Vendor
| Device
| | Revision ATA ATAPI ATA66 ATA133
| | | south/host bridge id PIO DMA PIO DMA ATA33 | ATA100| Docs
| | | | south/host bridge rev. 32bit | 32bit | | | | | avail
| | | | | | | | | | | | | |
v v v v v v v v v v v v v v

0x8086 Intel
0x1230 PIIX x x x x - - - - x
< 02 x - x - - - - - x
0x84C4 Orion
< 04 x - x - - - - - x
0x7010 PIIX3 x x x x - - - - x
0x7111 PIIX4 x x x x x - - - x
0x7199 PIIX4 MX x x x x x - - - x
0x84CA PIIX4 NX x x x x x - - - x
0x2411 ICH x x x x x x - - x
0x7601 ICH x x x x x x - - x
0x2421 ICH0 x x x x x - - - x
0x244B ICH2 x x x x x x x - x
0x244A ICH2 mobile x x x x x x x - x
0x248B ICH3 x x x x x x x - x
0x248A ICH3 mobile x x x x x x x - x

known bugs:
- PIIX3: some chips 'forget' to assert the IRQ sometimes. These chips are not
detectable in advance.

--------------------------------------------------------------------------------
0x1106 VIA
0x1571 571 x x x x - - - - -
0x0571 571
0x0586
< 0x20 586 x x x x - - - - -
>=0x20 586A/B x x x x x - - - x
0x0596
< 0x10 596/A x x x x x - - - x
< 0x10 596B x x x x x x - - x
0x0686
< 0x10 686 x x x x x - - - -
< 0x40 686A x x x x x x - - x
>=0x40 686B x x x x x x x - -
0x8231 VT8231 x x x x x x x - -
0x3074 VT8233 x x x x x x x - -
0x3109 VT8233c x x x x x x x - -
0x3147 VT8233a x x x x x x x x -
known bugs:
- all: no host side cable type detection.
- all: the busmaster 'active' bit doesn't match the actual busmaster state.
- 596B: don't touch the busmaster registers too early after interrupt
don't touch taskfile registers before stopping the busmaster!
- 686 rev 40/41 and VT8231 rev 10/11 have the PCI corruption bug!

--------------------------------------------------------------------------------
0x10B9 ALi
0x5229 M5229
< 0x20 x x x - - - - - (x)
< 0xC1 1533, 1543E, 1543F x x x - x - - - (x)
< 0xC2 1543C x x x xR x - - - (x)
0xC3/
0x12 1543C-E x x x xR (x) - - - (x)
< 0xC4 1535, 1553, 1543C-Bx x x x x x x - - x
1535D
==0xC4 1535D+ x x x x x x x - x
> 0xC4 1535D+ x x x x x x x x -
known bugs:
- 1535 and better: varying methods of host side cable type detection.
- up to 1543C: busmaster engine 'active' status bit is nonfunctional
in UltraDMA modes.
- up to 1543C: can't do ATAPI DMA writes.
- 1543C-E: UltraDMA CRC checker fails with WDC disks.
- 1543C-Bx: must stop busmaster reads with 0x00 instead of 0x08.

--------------------------------------------------------------------------------
0x1039 SiS
0x5513 5513
< 0xD0 x x x x - - - - x
>=0xD0 x x x x x - - - x
>= 0x0530 x x x x x x - - (x)
> 0x0630 x x x x x x x - (x)
6/746 6/751 x x x x x x x x -
- older SiS: don't touch the busmaster registers too early after interrupt

--------------------------------------------------------------------------------
0x1095 CMD
0x0640 CMD 640 - - - - - - - - x
00 refuse!
0x0643 CMD 643
< 03 x x x x - - - - x
>=03 x x x x x - - - x
0x0646 CMD 646
< 03 x x x x - - - - x
>=03 x x x x x - - - x
0x0648 CMD 648 x x x x x x - - x
0x0649 CMD 649 x x x x x x x - (x)
known bugs:
- 640: the enable bit of the secondary channel is erratic. You need to check
both settings '0' and '1' for a populated channel.
- 640: revision 0 doesn't work reliably.
- up to 646: both channels share internal resources. Serialization is
required.

--------------------------------------------------------------------------------
0x105A Promise
0x4D33 Ultra/FastTrack33 x x - - x - - - -
0x4D38 Ultra/FastTrack66 x x - (x) x x - - x
0x4D30 Ultra/FastTrack100 x x - (x) x x x - x
0x0D30 Ultra/FastTrack100 x x - (x) x x x - x
0x4D68 Ultra/FastTrack100 TX2 x x x x x x x - (x)
0x6268 Ultra/FastTrack100 TX2 x x x x x x x - (x)
0x4D69 Ultra/FastTrack133 x x x x x x x x x
0x1275 Ultra/FastTrack133 x x x x x x x x -
known bugs:
- up to Ultra100: don't issue superfluous PIO transfer mode setups.
- up to Ultra100: if any device is initialized to UltraDMA, you need to
reset the channel if you want to select MultiWord DMA instead.
- Ultra66/100: ATAPI DMA should work according to Windows drivers, but I
can see channel lockups only.

--------------------------------------------------------------------------------
0x1078 Cyrix
0x0102 CX5530 x x x x x - - - x
known bugs:
- all: busmaster transfers need to be 16 byte aligned instead of word
aligned.

--------------------------------------------------------------------------------
0x1103 HighPoint
0x0004 HPT 36x/37x
<=01 HPT 366 x x x x x x - - x
02 HPT 368 x x x x x x - - -
03 HPT 370 x x x x x x x - x
04 HPT 370A x x x x x x x - (x)
05 HPT 372 x x x x x x x x x
0x0008 HPT 36x/37x dual
07 HPT 374 x x x x x x x x x
known bugs:
- HPT366: random failures with several disks.
- HPT366: random PCI bus lockups in case of too long bursts.
- HPT366: IBM DTLA series drives must be set to Ultra DMA mode 5 (!!) to work
reliably at Ultra DMA mode 4 speed.

--------------------------------------------------------------------------------
0x1022 AMD
0x7401 AMD 751 x x x x x - - - -
0x7409 AMD 756 x x x x x x - - x
0x7411 AMD 766 MP x x x x x x x - x
0x7441 AMD 768 MPX x x x x x x x - x
0x7469 AMD 8111 x x x x x x x - -
known bugs:
- 756: no host side cable type detection.
- 756: SingleWord DMA doesn't work on early chip revisions.
- 766: read/write prefetches must be disabled to defeat infinite
PCI bus retries.

--------------------------------------------------------------------------------
0x1191 AEC/Artop
0x0005 AEC 6210 x x ? ? x - - - -
0x0006 AEC 6260 x x ? ? x x - - -
0x0007 AEC 6260 x x ? ? x x - - -
0x0009 AEC 6280/6880 x x ? ? x x x x -
known bugs:
- 6210 (possibly 6260): task file registers are inaccessible until busmaster
engine is stopped.
- possibly all: both channels share internal resources. Serialization is
required.

--------------------------------------------------------------------------------
0x1055 SMSC
0x9130 SLC90E66 ? x ? ? x x - - x
--------------------------------------------------------------------------------
0x1166 ServerWorks
0x0211 OSB4 x x ? ? x - - - x
0x0212 CSB5
< 0x92 x x ? ? x x - - -
>= 0x92 x x ? ? x x x - -
known bugs:
- OSB4: at least some chip revisions can't do Ultra DMA mode 1 and above
- CSB5: no host side cable type detection.

--------------------------------------------------------------------------------
0x1045 Opti
0xC621 n/a x - ? - - - - - x
0xC558 Viper x x ? ? - - - - x
0xD568 x x ? ? - - - - x
< 0xC700 Viper x x ? ? - - - - x
>=0xC700 FireStar/Vendetta? x x x x x - - - x
0xD721 Vendetta? x x x x x - - - x
0xD768 Vendetta x x x x x - - - x
known bugs:
- C621: both channels share internal resources. Serialization is required.
- FireStar: Ultra DMA works reliably only at mode 0.
Update: not even that! Better do MWDMA2 at most.

--------------------------------------------------------------------------------
0x10DE Nvidia
0x01BC nForce x x x x x x x - -
known bugs:
- nForce: no host side cable type detection.

--------------------------------------------------------------------------------
0x100B National Semiconductor
0x0502 SCx200 x x x x x - - - -
known bugs:
- all: busmaster transfers need to be 16 byte aligned instead of word
aligned.



~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
Daniela Engert, systems engineer at MEDAV GmbH
Gräfenberger Str. 34, 91080 Uttenreuth, Germany
Phone ++49-9131-583-348, Fax ++49-9131-583-11

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