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Date:      Mon, 05 May 2014 22:51:26 +0300
From:      Alexander Motin <mav@FreeBSD.org>
To:        Adrian Chadd <adrian.chadd@gmail.com>,  "freebsd-acpi@freebsd.org" <freebsd-acpi@freebsd.org>
Subject:   Re: suspend issues with latest -HEAD, ahci failing to complete something?
Message-ID:  <5367EBBE.2020602@FreeBSD.org>
In-Reply-To: <CAJ-VmomgVwuQXE0LLJurjg2Zx-7Q5s7RCCZ5JBQD7W2HSce7OA@mail.gmail.com>
References:  <CAJ-VmomgVwuQXE0LLJurjg2Zx-7Q5s7RCCZ5JBQD7W2HSce7OA@mail.gmail.com>

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On 05.05.2014 20:37, Adrian Chadd wrote:
> (I know, I just emailed out asking about setting S3 for the default
> lid suspend state, however I just updated to the very latest head and
> things went a little backwards.)
>
> Suspend no longer works for me:
>
> May  5 10:33:10 lucy-11i386 acpi: suspend at 20140505 10:33:10
> May  5 10:33:47 lucy-11i386 kernel: ahcich0: Timeout on slot 19 port 0
> May  5 10:33:47 lucy-11i386 kernel: ahcich0: is 00000000 cs fff80fff
> ss fff80fff rs fff80fff tfd d0 serr 00000000 cmd 0000d317
> May  5 10:33:47 lucy-11i386 kernel: (ada0:ahcich0:0:0:0):
> WRITE_FPDMA_QUEUED. ACB: 61 08 e0 b0 fa 40 42 00 00 00 00 00
> May  5 10:33:47 lucy-11i386 kernel: (ada0:ahcich0:0:0:0): CAM status:
> Command timeout
> May  5 10:33:47 lucy-11i386 kernel: (ada0:ahcich0:0:0:0): Retrying command
> May  5 10:33:13 lucy-11i386 acpi: resumed at 20140505 10:33:13
>
> May  5 10:33:59 lucy-11i386 acpi: suspend at 20140505 10:33:59
> May  5 10:34:37 lucy-11i386 kernel: ahcich0: Timeout on slot 9 port 0
> May  5 10:34:37 lucy-11i386 kernel: ahcich0: is 00000000 cs ffffff83
> ss ffffff83 rs ffffff83 tfd d0 serr 00000000 cmd 0000c717
> May  5 10:34:37 lucy-11i386 kernel: (ada0:ahcich0:0:0:0):
> WRITE_FPDMA_QUEUED. ACB: 61 08 18 5c f7 40 42 00 00 00 00 00
> May  5 10:34:37 lucy-11i386 kernel: (ada0:ahcich0:0:0:0): CAM status:
> Command timeout
> May  5 10:34:37 lucy-11i386 kernel: (ada0:ahcich0:0:0:0): Retrying command
> May  5 10:34:03 lucy-11i386 acpi: resumed at 20140505 10:34:03
>
> What has recently changed that'd possibly break ahci's ability to
> correctly suspend?

When I tested it last time (awhile ago), it was working for me. 
ahci_ch_suspend() should block all I/O on the channel and wait until all 
active commands complete. On resume channel should be reinitialized, 
device reset and only then I/Os should be released. Do you see those 
timeouts on suspend or resume?

Do you have kern.cam.ada.spindown_suspend enabled? Can you try to 
disable it?

-- 
Alexander Motin



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