From: Gerd Hoffmann <kraxel@redhat.com>
To: Juergen Gross <jgross@suse.com>
Cc: xen-devel@lists.xensource.com, qemu-devel@nongnu.org,
stefano.stabellini@eu.citrix.com
Subject: Re: [Qemu-devel] [Patch V1 2/3] xen/usb: add capability for passing through isoc jobs to host devices
Date: Wed, 09 Sep 2015 14:01:00 +0200 [thread overview]
Message-ID: <1441800060.27149.50.camel@redhat.com> (raw)
In-Reply-To: <55F019F6.30506@suse.com>
Hi,
> > So, the signaling needs to be different. The host adapter needs to
> > signal somehow that it can handle async iso packets. One way would be
> > to flag this per usb bus, another one per usb packet. Also all xen
> > naming and the xen inlude should go away. BTW: does this build without
> > xen-devel installed?
>
> Okay, I'll try to make it more generic. I think the async iso capability
> should be a bus attribute.
Makes sense.
> > Can we get rid of the callbacks? By filling the USBPacket iovec with
> > the iso request chunks for example?
>
> Difficult. One iso request chunk could require multiple iovec entries.
Why multiple small iovecs instead of one big iovec?
usb_host_req_complete_iso_xen() returns a single status for the whole
USBPacket anyway ...
> The RFC version tried to avoid the callbacks and there you didn't like
> exposing the additional structures.
-ENOPATCH.
cheers,
Gerd
next prev parent reply other threads:[~2015-09-09 12:01 UTC|newest]
Thread overview: 17+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-09-03 10:45 [Qemu-devel] [Patch V1 0/3] usb, xen: add pvUSB backend Juergen Gross
2015-09-03 10:45 ` [Qemu-devel] [Patch V1 1/3] xen: introduce dummy system device Juergen Gross
2015-09-07 15:29 ` Stefano Stabellini
2015-09-09 11:01 ` [Qemu-devel] [Xen-devel] " Juergen Gross
2015-09-03 10:45 ` [Qemu-devel] [Patch V1 2/3] xen/usb: add capability for passing through isoc jobs to host devices Juergen Gross
2015-09-04 13:25 ` Gerd Hoffmann
2015-09-09 11:37 ` Juergen Gross
2015-09-09 12:01 ` Gerd Hoffmann [this message]
2015-09-09 13:10 ` Juergen Gross
2015-09-09 14:43 ` Gerd Hoffmann
2015-09-15 19:17 ` [Qemu-devel] [Xen-devel] " Konrad Rzeszutek Wilk
2015-09-03 10:45 ` [Qemu-devel] [Patch V1 3/3] xen: add pvUSB backend Juergen Gross
2015-09-07 17:38 ` Stefano Stabellini
2015-09-09 11:22 ` [Qemu-devel] [Xen-devel] " Juergen Gross
2015-09-09 13:13 ` Stefano Stabellini
2015-10-27 18:54 ` Konrad Rzeszutek Wilk
2016-03-07 12:43 ` Juergen Gross
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