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From: Oliver Neukum <Oliver.Neukum@lrz.uni-muenchen.de>
To: Abramo Bagnara <abramo@alsa-project.org>,
	Alan Cox <alan@lxorguk.ukuu.org.uk>
Cc: "D.A.Fedorov@inp.nsk.su Balbir Singh" <balbir_soni@yahoo.com>,
	linux-kernel@vger.kernel.org
Subject: Re: Is it useful to support user level drivers
Date: Thu, 21 Jun 2001 23:09:04 +0200	[thread overview]
Message-ID: <01062123090407.02500@idun> (raw)
In-Reply-To: <E15D8Ec-0001lL-00@the-village.bc.nu> <3B325206.3EB44DDD@alsa-project.org>
In-Reply-To: <3B325206.3EB44DDD@alsa-project.org>


> Kernel space:
> - irq 9 arrives from our device
> - interrupts are disabled
> - our kernel space micro handler is invoked
> - interrupt source is checked
> - if no notification is pending a signal is notificated for user space
> (or a process is marked runnable)
> - optionally our device interrupt generation is disabled
> - handler returns
> - interrupts are enabled

Then why bother ? Write a minimum conventional kernel driver implementing 
poll()

	Regards
		Oliver

  parent reply	other threads:[~2001-06-21 21:11 UTC|newest]

Thread overview: 38+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2001-06-21 10:41 Is it useful to support user level drivers Balbir Singh
2001-06-21 10:55 ` Tim Waugh
2001-06-21 11:04 ` Alan Cox
2001-06-21 12:43   ` Balbir Singh
2001-06-21 13:27     ` Alan Cox
2001-06-28 22:52     ` Pavel Machek
2001-06-21 12:45   ` Dmitry A. Fedorov
2001-06-21 13:24     ` Oliver Neukum
2001-06-21 14:46       ` Dmitry A. Fedorov
2001-06-21 15:19         ` Oliver Neukum
2001-06-22  4:19           ` Dmitry A. Fedorov
2001-06-22  7:28             ` Balbir Singh
2001-06-21 16:34         ` Abramo Bagnara
2001-06-21 17:27           ` Alan Cox
2001-06-21 19:59             ` Abramo Bagnara
2001-06-21 20:40               ` Richard B. Johnson
2001-06-21 20:54                 ` Abramo Bagnara
2001-06-21 21:09               ` Oliver Neukum [this message]
2001-06-28 22:57             ` Pavel Machek
2001-06-21 13:28     ` Alan Cox
2001-06-21 14:03       ` Matthias Urlichs
2001-06-28 22:54         ` Pavel Machek
2001-06-21 14:20       ` Dmitry A. Fedorov
2001-06-21 11:38 ` Dmitry A. Fedorov
2001-06-21 13:50   ` john slee
2001-06-21 13:58     ` Matthias Urlichs
2001-06-21 14:21       ` john slee
2001-06-28 22:51 ` Pavel Machek
     [not found] <mailman.993156181.18994.linux-kernel2news@redhat.com>
2001-06-21 22:06 ` Pete Zaitcev
2001-06-21 22:20   ` David S. Miller
2001-06-21 23:09     ` Mike Mackovitch
2001-06-21 23:22       ` David S. Miller
2001-06-21 23:50         ` Mike Mackovitch
2001-06-22  0:36           ` David S. Miller
2001-06-21 23:40   ` Richard B. Johnson
2001-06-22  0:30     ` Anders Larsen
2001-06-22  0:43       ` Richard B. Johnson
2001-06-25  0:06         ` Anders Larsen

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