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

[Alexander Jacocks <jjacocks%gmail.com@localhost>]

> On Jun 13, 2024, at 8:44 AM, Manuel Bouyer <bouyer%antioche.eu.org@localhost> wrote:
> 
> On Thu, Jun 13, 2024 at 08:39:37AM -0400, Alexander Jacocks wrote:
>> 
>>>> On Jun 13, 2024, at 5:51?AM, Manuel Bouyer <bouyer%antioche.eu.org@localhost> wrote:
>>> 
>>> ?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.
>> 
>> Interesting. I was able to verify that Windows 98SE is able to enable DMA support, even with the current BIOS settings. This BIOS is pretty limited in what can be configured, unfortunately.
> 
> From memory, win98 was the "PnP OS". it had to be disabled for others.
> 
>> 
>> Would disabling ACPI and enabling APM possibly help? Since this board clearly has a broken ACPI configuration, that seems like a possibility.
> 
> No APM is something different
> 

And PNP is currently disabled, as much as is possible. Is there anything else that I can try to do to make the registers mappable?

Thanks!
- Alex