Re: Acer M5229 IDE bugs (esp. on sparc64)

[Rafal Boni <rafal%pobox.com@localhost>]

Earlier, I wrote:
> What is interesting is that if I add the following bit of debug to 
> ata/ata_wdc.c:
>
> Index: ata/ata_wdc.c
> ===================================================================
> RCS file: /cvsroot/src/sys/dev/ata/ata_wdc.c,v
> retrieving revision 1.87
> diff -u -p -b -u -p -r1.87 ata_wdc.c
> --- ata/ata_wdc.c       19 Oct 2007 11:59:36 -0000      1.87
> +++ ata/ata_wdc.c       14 Feb 2008 18:57:03 -0000
> @@ -687,6 +687,9 @@ wdc_ata_bio_intr(struct ata_channel *chp
>                 }
>                 if (wdc->dma_status != 0) {
>                         if (drv_err != WDC_ATA_ERR) {
> +                               printf("%s:%d:%d: DMA error (st=0x%x, 
> er=0x%x)\n
> ",
> +                                   atac->atac_dev.dv_xname, 
> chp->ch_channel,
> +                                   xfer->c_drive, wdc->dma_status, 
> ata_bio->r_error);
>                                 ata_bio->error = ERR_DMA;
>                                 drv_err = WDC_ATA_ERR;
>                         }
>
> I see that wdc->dma_status is always 0x04 (WDC_DMAST_UNDER), which is a 
> synthetic error generated only by pciide_dma_finish().  

Moreover, whenever my v100 hits this case, ata_bio->r_error == 0, so 
this is definitely not an error coming down from the controller/disk.

--rafal