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From: Stefan Hajnoczi <stefanha@gmail.com>
To: sfeldma@gmail.com
Cc: jiri@resnulli.us, roopa@cumulusnetworks.com,
	john.fastabend@gmail.com, qemu-devel@nongnu.org,
	dsahern@gmail.com, pbonzini@redhat.com, jasowang@redhat.com
Subject: Re: [Qemu-devel] [PATCH v5 03/10] rocker: add register programming guide
Date: Mon, 2 Feb 2015 17:19:12 +0100	[thread overview]
Message-ID: <20150202161912.GB10862@stefanha-thinkpad> (raw)
In-Reply-To: <1421913839-22448-4-git-send-email-sfeldma@gmail.com>

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On Thu, Jan 22, 2015 at 12:03:52AM -0800, sfeldma@gmail.com wrote:
> +SECTION 7: Switch Control
> +=========================
> +
> +This section covers switch-wide register settings.
> +
> +Control
> +-------
> +
> +This register is used for low level control of the switch.
> +
> +	CONTROL: offset 0x0300, 32-bit, (W)
> +
> +	bit	name		description
> +	------------------------------------------------------------------------
> +	[0]	CONTROL_RESET	If set, device will perform reset

This doesn't block the patch series, but I have a question:

Reset is not defined.

What exactly gets reset?

How does the CPU detect that the device has completed the reset
procedure?  Is this supposed to be synchronous?  If yes, is that a good
idea (i.e. hopefully resetting doesn't involve any blocking operations
or operations that take a long time)?

Stefan

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  parent reply	other threads:[~2015-02-03  9:43 UTC|newest]

Thread overview: 25+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2015-01-22  8:03 [Qemu-devel] [PATCH v5 00/10] rocker: add new rocker ethernet switch device sfeldma
2015-01-22  8:03 ` [Qemu-devel] [PATCH v5 01/10] net: add MAC address string printer sfeldma
2015-01-22  8:03 ` [Qemu-devel] [PATCH v5 02/10] virtio-net: use qemu_mac_strdup_printf sfeldma
2015-02-03 16:19   ` Eric Blake
2015-01-22  8:03 ` [Qemu-devel] [PATCH v5 03/10] rocker: add register programming guide sfeldma
2015-02-02 16:16   ` Stefan Hajnoczi
2015-02-02 16:19   ` Stefan Hajnoczi [this message]
2015-02-03 11:08     ` Paolo Bonzini
2015-02-05 10:45       ` Stefan Hajnoczi
2015-02-05  6:29     ` Scott Feldman
2015-02-03 16:40   ` Eric Blake
2015-02-05  6:25     ` Scott Feldman
2015-01-22  8:03 ` [Qemu-devel] [PATCH v5 04/10] pci: add rocker device ID sfeldma
2015-01-22  8:03 ` [Qemu-devel] [PATCH v5 05/10] pci: add network device class 'other' for network switches sfeldma
2015-01-22  8:03 ` [Qemu-devel] [PATCH v5 06/10] rocker: add new rocker switch device sfeldma
2015-02-02 17:12   ` Stefan Hajnoczi
2015-01-22  8:03 ` [Qemu-devel] [PATCH v5 07/10] qmp: add rocker device support sfeldma
2015-02-03 15:10   ` Eric Blake
2015-02-05  6:10     ` Scott Feldman
2015-01-22  8:03 ` [Qemu-devel] [PATCH v5 08/10] rocker: add tests sfeldma
2015-02-02 16:36   ` Stefan Hajnoczi
2015-01-22  8:03 ` [Qemu-devel] [PATCH v5 09/10] MAINTAINERS: add rocker sfeldma
2015-01-22  8:03 ` [Qemu-devel] [PATCH v5 10/10] rocker: timestamp on the debug logs helps correlate with events in the VM sfeldma
2015-01-22  8:21   ` Jiri Pirko
2015-02-02 17:13 ` [Qemu-devel] [PATCH v5 00/10] rocker: add new rocker ethernet switch device Stefan Hajnoczi

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