From: Albert Lee <albertcc@tw.ibm.com>
To: Jeff Garzik <jeff@garzik.org>
Cc: Alan Cox <alan@lxorguk.ukuu.org.uk>, Doug Maxey <dwm@enoyolf.org>,
Mark Lord <mlord@pobox.com>, Tejun Heo <htejun@gmail.com>,
Linux IDE <linux-ide@vger.kernel.org>
Subject: [PATCH 0/7] libata: irq_on/off restructuring (take #2)
Date: Sat, 07 Jul 2007 14:57:13 +0800 [thread overview]
Message-ID: <468F3949.5050800@tw.ibm.com> (raw)
(Revised per Tejun's advice.)
For ATA, there are two levels of mechanism available to turn irq on/off.
- device level: nIEN bit in the control register. This masks INTRQ from the device.
- host adapter level: some controllers can mask out per-port irq from the host adapter.
Currently various parts of libata deal with irq on/off.
ex. tf_load() can alter the nIEN bit.
ex. irq_on() also alters the device level nIEN bit.
ex. freeze()/thaw() deal with the host adapter irq mask.
It seems these irq_on/off codes could be better structured.
Patches against the libata-dev tree for your review, thanks.
1/7: remove irq_on from ata_bus_reset() and ata_std_postreset()
2/7: sata_promise::pdc_freeze() semantic change
3/7: add freeze()/thaw() to old EH LLDDs
4/7: use freeze()/thaw() for polling PIO
5/7: integrate freeze/thaw with irq_on/off
6/7: tf_load() cleanup
7/7: remove ap->last_ctl
next reply other threads:[~2007-07-07 6:57 UTC|newest]
Thread overview: 14+ messages / expand[flat|nested] mbox.gz Atom feed top
2007-07-07 6:57 Albert Lee [this message]
2007-07-07 7:00 ` [PATCH 1/7] libata: remove irq_on from ata_bus_reset() and ata_std_postreset() Albert Lee
2007-07-12 20:12 ` Jeff Garzik
2007-07-07 7:02 ` [PATCH 2/7] sata_promise: pdc_freeze() semantic change Albert Lee
2007-10-02 15:28 ` Jeff Garzik
2007-07-07 7:05 ` [PATCH 3/7] libata: add freeze/thaw to old EH LLDDs Albert Lee
2007-07-07 7:09 ` [PATCH 4/7] libata: use freeze/thaw for polling PIO Albert Lee
2007-07-13 6:53 ` Tejun Heo
2007-07-07 7:12 ` [PATCH 5/7] libata: integrate freeze/thaw with irq_on/off Albert Lee
2007-07-13 6:51 ` Tejun Heo
2007-07-16 9:17 ` Albert Lee
2007-07-07 7:20 ` [PATCH 6/7] libata: remove nIEN handling from ata_tf_load() Albert Lee
2007-07-07 7:23 ` [PATCH 7/7] libata: remove ap->last_ctl Albert Lee
2007-07-13 6:58 ` Tejun Heo
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