From: Jeff Garzik <jgarzik@pobox.com>
To: Tejun Heo <htejun@gmail.com>
Cc: alan@lxorguk.ukuu.org.uk, axboe@suse.de, albertcc@tw.ibm.com,
forrest.zhao@intel.com, efalk@google.com,
linux-ide@vger.kernel.org
Subject: Re: [PATCH 09/11] ahci: convert to new EH
Date: Sat, 13 May 2006 18:30:43 -0400 [thread overview]
Message-ID: <44665E13.9090300@pobox.com> (raw)
In-Reply-To: <1147353689306-git-send-email-htejun@gmail.com>
Tejun Heo wrote:
> Convert AHCI to new EH. Unfortunately, ICH7 AHCI reacts badly if IRQ
> mask is diddled during operation. So, freezing is implemented by
> unconditionally clearing interrupt conditions while frozen.
For standard BMDMA hardware, you -absolutely must- stop DMA, before
doing -anything- else, including EH/recovery.
This sort of scenario will be quite common. I would recommend doing so
on sata_sil, sata_promise, ...
> * Interrupts are categorized according to required action.
> e.g. Connection status or unknown FIS error requires freezing the
> port while TF or HBUS_DATA don't.
>
> * Only CONNECT (reflects SErr.X) interrupt is taken into account not
> PHYRDY (SErr.N), as CONNECT is better cue for starting EH.
>
> * AHCI may be invoked without any active command. e.g. CONNECT irq
> occuring while no qc in progress still triggers EH and will reset
> the port and revalidate attached device.
>
> Signed-off-by: Tejun Heo <htejun@gmail.com>
ACK
next prev parent reply other threads:[~2006-05-13 22:30 UTC|newest]
Thread overview: 48+ messages / expand[flat|nested] mbox.gz Atom feed top
2006-05-11 13:21 [PATCHSET 03/11] new EH implementation, take 3 Tejun Heo
2006-05-11 13:21 ` [PATCH 03/11] libata-eh: add per-dev ata_ering Tejun Heo
2006-05-11 13:21 ` [PATCH 01/11] libata-eh: add ATA and libata flags for new EH Tejun Heo
2006-05-13 22:15 ` Jeff Garzik
2006-05-11 13:21 ` [PATCH 02/11] libata-eh: implement ata_ering Tejun Heo
2006-05-13 22:16 ` Jeff Garzik
2006-05-13 23:36 ` Tejun Heo
2006-05-14 1:05 ` Jeff Garzik
2006-05-14 1:20 ` Tejun Heo
2006-05-14 1:32 ` Jeff Garzik
2006-05-14 1:38 ` Tejun Heo
2006-05-15 13:36 ` Alan Cox
2006-05-15 14:00 ` Tejun Heo
2006-05-15 14:25 ` Tejun Heo
2006-05-15 14:50 ` Alan Cox
2006-05-15 14:57 ` Tejun Heo
2006-05-15 15:19 ` Alan Cox
2006-05-15 15:19 ` Tejun Heo
2006-05-15 18:22 ` Jeff Garzik
2006-05-11 13:21 ` [PATCH 04/11] libata-eh: implement ata_eh_info and ata_eh_context Tejun Heo
2006-05-11 13:21 ` [PATCH 06/11] libata-eh: implement BMDMA EH Tejun Heo
2006-05-13 22:21 ` Jeff Garzik
2006-05-13 23:41 ` Tejun Heo
2006-05-15 13:38 ` Alan Cox
2006-05-15 13:59 ` Tejun Heo
2006-05-15 14:43 ` Alan Cox
2006-05-11 13:21 ` [PATCH 05/11] libata-eh: implement new EH Tejun Heo
2006-05-13 22:19 ` Jeff Garzik
2006-05-11 13:21 ` [PATCH 08/11] sata_sil: convert to " Tejun Heo
2006-05-11 14:22 ` Alan Cox
2006-05-11 14:39 ` Tejun Heo
2006-05-11 15:46 ` Alan Cox
2006-05-11 15:45 ` Tejun Heo
2006-05-11 16:12 ` Alan Cox
2006-05-11 16:10 ` Tejun Heo
2006-05-11 17:16 ` Alan Cox
2006-05-13 22:26 ` Jeff Garzik
2006-05-13 23:43 ` Tejun Heo
2006-05-11 13:21 ` [PATCH 07/11] ata_piix: " Tejun Heo
2006-05-13 22:23 ` Jeff Garzik
2006-05-11 13:21 ` [PATCH 11/11] sata_sil24: " Tejun Heo
2006-05-11 13:21 ` [PATCH 09/11] ahci: " Tejun Heo
2006-05-13 10:53 ` Tejun Heo
2006-05-13 22:30 ` Jeff Garzik [this message]
2006-05-13 23:49 ` Tejun Heo
2006-05-11 13:21 ` [PATCH 10/11] ahci: add PIOS interim interrupt handling Tejun Heo
2006-05-13 22:34 ` [PATCHSET 03/11] new EH implementation, take 3 Jeff Garzik
2006-05-13 23:58 ` Tejun Heo
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