Hi
ATA has done this for a long time for AHCI, if needed resources are
there it will go for AHCI and try to use it for known chipsets.
What is relatively new in ATA is that it will go for chipsets that
claim to be AHCI compliant via the PCI "progif" register, however the
AHCI BAR still needs to be populated for it to be able to grap
resources needed.
However some BIOS's effectively disables AHCI BAR's etc when its not
selected, not much we can do about that, or at least it will be a
nightmare to support.
-Søren
On 16Apr, 2008, at 16:08 , John Baldwin wrote:
On Monday 14 April 2008 01:09:23 pm Søren Schmidt wrote:
Hi
Yes, the registers used for setting up events when hotswap happens
are
not accessible when in legacy compat mode.
If all you need is for the AHCI BAR to have resources assigned newer
FreeBSD
kernels (at least 6.x and later) are smart enough to alloc resources
for a
BAR that the BIOS doesn't assign resources for when you do a
bus_alloc_resource().
-Søren
On 14Apr, 2008, at 18:00 , Dag-Erling Smørgrav wrote:
Søren Schmidt <[EMAIL PROTECTED]> writes:
You have to set AHCI mode in the BIOS or the resources needed to
use
it wont be available, so yes its software but not ours :)
Thanks Søren, I will make sure the BIOS is correctly configured.
Does this also affect hotswap? I assume that the ICH8 supports it,
but
I haven't been able to make it work.
DES
--
Dag-Erling Smørgrav - [EMAIL PROTECTED]
--
John Baldwin
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