Re: [PATCH] make my life easier ...

Re: [PATCH] make my life easier ...

[Russell King]

Andre Hedrick writes:
> APM signals ATA/IDE to goto sleep.
> IDE then records and buffers the setup of the host and device.
> IDE forces device and host to PIO 0 (imortant step, explain later)
> IDE issues spindown and sleep task-command.
> IDE returns to APM with success/failure.

Insert here... BIOS tries to hibernate to disk and finds the disk already
asleep.

> 	success, sets request_queue blocker flag (very critical)
   _____
  |_____| ------------------------------------------------- ---+---+-
  |   |         Russell King        rmk@arm.linux.org.uk      --- ---
  | | | | http://www.arm.linux.org.uk/personal/aboutme.html   /  /  |
  | +-+-+                                                     --- -+-
  /   |               THE developer of ARM Linux              |+| /|\
 /  | | |                                                     ---  |
    +-+-+ -------------------------------------------------  /\\\  |
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Re: [PATCH] make my life easier ...

[Andre Hedrick]

On Wed, 1 Nov 2000, Martin Mares wrote:

> Hello!
> 
> > Aside from all of the other comments that've been made, because the user might
> > have tweeked them at boot.  ie turn on UDMA.  If we just re-initalized on
> > wakeup, you loose this.
> 
> I've of course meant reinitialize with the user-supplied settings, just as we
> do during normal initialization/configuration of the driver.

No, we put it back in the mode it was in before APM wacked.
Yes, if we call the settings before APM wacks it 'user settings'.

Cheers,

Andre Hedrick
CTO Timpanogas Research Group
EVP Linux Development, TRG
Linux ATA Development

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Re: [PATCH] make my life easier ...

[Martin Mares]

Hello!

> Aside from all of the other comments that've been made, because the user might
> have tweeked them at boot.  ie turn on UDMA.  If we just re-initalized on
> wakeup, you loose this.

I've of course meant reinitialize with the user-supplied settings, just as we
do during normal initialization/configuration of the driver.

				Have a nice fortnight
-- 
Martin `MJ' Mares <mj@ucw.cz> <mj@suse.cz> http://atrey.karlin.mff.cuni.cz/~mj/
"The computer is mightier than the pen, the sword, and usually, the programmer."
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Re: [PATCH] make my life easier ...

[Alan Cox]

> certainly accept it), then why not just do the equivalent of a reset in
> the high-level IDE driver on coming back from sleep? Possibly together
> with forcing any other setup state we know about.

Because windows seems to drop the controller back to PIO mode 0 and the BIOS
knows about it. At least in the palmax case, although since 2.4test doesnt
boot on it as of pre9 I've not tried the 2.4 patches yet.

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Re: [PATCH] make my life easier ...

[Andre Hedrick]

LT,

I can do it from user-space completely, but not today.
The tools are missing.
Also I have/will get my traces on my code in a day or so.

Cheers,

Andre Hedrick
The Linux ATA/IDE guy

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