From: Jeff Garzik <jgarzik@pobox.com>
To: kallol@nucleodyne.com
Cc: Mark Lord <liml@rtr.ca>, linux-ide@vger.kernel.org
Subject: Re: Enabling MSI on SATAII150
Date: Sat, 20 Aug 2005 02:19:05 -0400 [thread overview]
Message-ID: <4306CB59.4000202@pobox.com> (raw)
In-Reply-To: <1119834710.13331.654.camel@driver>
Kallol Biswas wrote:
> Hello Jeff,
> We have been using the sx8 driver on a MIPS based custom
> platform.
> It seems the line based interrupt mechanism is broken on the system.
>
> SATA1150 controller supports MSI interrupt like other PCI-X devices.
>
> Unfortunately we do not have access to the controller's technical
> specification yet.
>
> Would it be possible to send us a reply detailing how to enable
> MSI interrupt on the adapter?
Should be just pci_enable_msi() in the appropriate place. Look at
recent drivers/scsi/ahci.c for an example.
> BTW, with CARM_MAX_Q == 30 and a workaround to fix lost interrupt we
> have got good performance with the driver. Thanks for good work. MSI
> will help improve performance more, as there won't be any delay
> associated with handling lost interrupt.
Cool.
Jeff
prev parent reply other threads:[~2005-08-20 6:19 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2005-06-11 6:18 Fwd: Re: Performance figure for sx8 driver kallol
2005-06-12 16:30 ` Mark Lord
2005-06-12 17:43 ` Kallol Biswas
2005-06-13 3:39 ` Jeff Garzik
2005-06-27 1:11 ` Enabling MSI on SATAII150 Kallol Biswas
2005-06-27 3:54 ` Jeff Garzik
2005-08-20 6:19 ` Jeff Garzik [this message]
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