Re: sata_sil data corruption

[Jeff Garzik]

PALFFY Daniel wrote:
> Hi,
>
> I'm trying to set up a machine with a si3112a controller (lspci: 1095:3112
> (rev 01) Subsystem: 1095:6112, cheap PCI card) and a ST3200822AS Rev:
> 3.01 disk and I see continuous silent data corruption while reading the
> disk. Writing seems to be ok. I have 2.6.10-ac1 built with conservative
> options (UP, no PREEMPT, 8k stack, no regparm). After seeing problems I
> tried to blacklist my drive to do MOD15, but it didn't help.
>
> Finally I did
>
>     unsigned long long i = 0;
>     while (write(1, &i, sizeof(i)) != -1) i++;
>
> to the only primary partition while running sata_sil. Reading it back with
>
>     unsigned long long i=0, j;
>     while (read(0, &j, sizeof(i)) == sizeof(i)) {
>         if (j != i) fprintf(stderr, "diff at %llx: read: %llx\n", i, j);
>         i++;
>     }
>
> gives similar results, but always different:
> diff at 5efff: read: 5ef24
> diff at 7ffff: read: 7ff08
> diff at 8ffff: read: 8ff51
> diff at 97fff: read: 97f00
> diff at affff: read: aff00
> diff at bffff: read: bffac
> diff at dffff: read: dff00
> diff at efffe: read: eff00
> diff at effff: read: eff00
> diff at fffbf: read: fffff
> and so on.
>
> Reading back the same data with the ide siimage driver worked for at least
> 500MB without corrupted data, but dma doesn't work with that driver, this
> is logged on about the first read attempt:
>
> hde: dma_intr: bad DMA status (dma_stat=76)
> hde: dma_intr: status=0x50 { DriveReady SeekComplete }
>
> ide: failed opcode was: unknown
> hde: DMA disabled
> ide2: reset phy, status=0x00000113, siimage_reset
> ide2: reset: success
>
> The machine is an old Compaq Prosignia 200, with a p2 300 and
> 0000:00:00.0 Host bridge: Intel Corp. 440FX - 82441FX PMC [Natoma] (rev 02)
> chipset. Relevant parts from dmesg:
>
> sata_sil:
>
> libata version 1.10 loaded.
> sata_sil version 0.8
> ata1: SATA max UDMA/100 cmd 0xC886A080 ctl 0xC886A08A bmdma 0xC886A000 irq 10
> ata2: SATA max UDMA/100 cmd 0xC886A0C0 ctl 0xC886A0CA bmdma 0xC886A008 irq 10
> ata1: dev 0 cfg 49:2f00 82:346b 83:7d01 84:4003 85:3469 86:3c01 87:4003 88:207f
> ata1: dev 0 ATA, max UDMA/133, 390721968 sectors: lba48
> ata1(0): applying Seagate errata fix
> ata1: dev 0 configured for UDMA/100
> scsi1 : sata_sil
> ata2: no device found (phy stat 00000000)
> scsi2 : sata_sil
>   Vendor: ATA       Model: ST3200822AS       Rev: 3.01
>   Type:   Direct-Access                      ANSI SCSI revision: 05
> SCSI device sdb: 390721968 512-byte hdwr sectors (200050 MB)
> SCSI device sdb: drive cache: write back
>
> siimage:
>
> SiI3112 Serial ATA: IDE controller at PCI slot 0000:00:0a.0
> SiI3112 Serial ATA: chipset revision 1
> SiI3112 Serial ATA: 100% native mode on irq 10
>     ide2: MMIO-DMA , BIOS settings: hde:DMA, hdf:DMA
>     ide3: MMIO-DMA , BIOS settings: hdg:pio, hdh:pio
> Probing IDE interface ide2...
> hde: ST3200822AS, ATA DISK drive
> hde: applying pessimistic Seagate errata fix
> ide2 at 0xc886a080-0xc886a087,0xc886a08a on irq 10
> hde: max request size: 7KiB
> hde: 390721968 sectors (200049 MB) w/8192KiB Cache, CHS=24321/255/63
> hde: cache flushes supported
>  hde:<3>hde: dma_intr: bad DMA status (dma_stat=76)
> hde: dma_intr: status=0x50 { DriveReady SeekComplete }
>
> ide: failed opcode was: unknown
>  hde1
> Probing IDE interface ide3...
> hdg: no response (status = 0xfe)
> hde: dma_intr: bad DMA status (dma_stat=76)
> hde: dma_intr: status=0x50 { DriveReady SeekComplete }
>
> ide: failed opcode was: unknown

Don't use --two-- drivers for the same hardware.

Can you re-test with siimage disabled?

	Jeff


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