Re: 10.0 DMA Issues With SIS-5597/5598 Chipset

[Manuel Bouyer <bouyer%antioche.eu.org@localhost>]

On Wed, Jun 12, 2024 at 10:29:59AM -0400, Alexander Jacocks wrote:
>    And it was pointed out to me that my paste of the DMA error was incorrect.
>    Here is the correct log:
>    [     1.000004] pci0 at mainbus0 bus 0: configuration mode 1
>    [     1.000004] pci0: i/o space, memory space enabled, rd/line, rd/mult,
>    wr/inv ok
>    [     1.000004] pchb0 at pci0 dev 0 function 0: Silicon Integrated System
>    5597/5598 Host Bridge (rev. 0x10)
>    [     1.000004] pcib0 at pci0 dev 1 function 0: Silicon Integrated System
>    85C503 or 5597/5598 ISA Bridge (rev. 0x01)
>    [     1.000004] siside0 at pci0 dev 1 function 1
>    [     1.000004] siside0: Silicon Integrated Systems 5597/5598 IDE
>    controller (rev. 0xd0)
>    [     1.000004] siside0: bus-master DMA support present, but unused
>    (couldn't map registers)

The problem here is that the DMA registers are not mappable, so can't be
used by the driver. Some BIOS settings (like PnP support) may affect this.

>    [     1.000004] siside0: secondary channel ignored (disabled)
>    I tried simply forcing DMA on by adding the 0x0001 flag to the pciide
>    driver, with a minor mod to the GENERIC kernel, but it didn't change the
>    behavior any. I also attempted to add in a Maxtor SATA-150 PCI IDE

Yes, that won't work in this case.

-- 
Manuel Bouyer <bouyer%antioche.eu.org@localhost>
     NetBSD: 26 ans d'experience feront toujours la difference
--