teration,
that would be the ravb-driver (which is an AVB capable NIC), but it does
not include much in the way of AVB-support *In* kernel. Sorry about that!
Since then, the iMX7 from NXP has arrived, and this also has HW-support for
TSN, but not in the kernel AFAICT.
So, the next issue I plan to tackle, is how I do buffers, the current
approach where tsn_core allocates memory is on its way out and I'll let the
shim (which means alsa/v4l2) will provide a buffer. Then I'll start looking
at qdisc.
Thanks!
--
Henrik Austad
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ding a
compressed video format" and then the shim/tsn_core will ship out the
frames over the network - and then you need to set TSN_CVF as subtype in
each header.
That does not that mean you should do H.264 encode/decode *in* the kernel
Perhaps this is better placed in include/uapi/tsn.h so that userspace and
kernel share the same header?
--
Henrik Austad
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On Fri, Dec 16, 2016 at 01:20:57PM -0500, David Miller wrote:
> From: Greg
> Date: Fri, 16 Dec 2016 10:12:44 -0800
>
> > On Fri, 2016-12-16 at 18:59 +0100, hen...@austad.us wrote:
> >> From: Henrik Austad
> >>
> >>
> >> The driver is d
Or do I
also need to run phc2sys in order to sync the system-time to PTP-time? Note
that this is for outgoing traffic, Rx should perhaps use the timestamp
in skb.
Hooking into ktime_get() instead of directly to the PTP-subsystem (if that
is even possible) makes it a lot easier to debug when running this in a VM
as it doesn't *have* to use PTP-time when I'm crashing a new kernel :)
Thanks!
--
Henrik Austad
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ounds
like it is doable to achieve something useful.
Looks like I will be looking into what to put in the .trigger-handler in
the ALSA shim and experimenting with this to see how it make sense to
connect it from the TSN-stream.
Thanks!
--
Henrik Austad
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On Sun, Jun 19, 2016 at 11:45:47PM +0900, Takashi Sakamoto wrote:
> (remove C.C. to lkml. This is not so major feature.)
>
> On Jun 19 2916 07:45, Henrik Austad wrote:
> >snip
> >
> >802.1Q gives you low latency through the network, but more importantly, no
> >
On Sun, Jun 19, 2016 at 11:46:29AM +0200, Richard Cochran wrote:
> On Sun, Jun 19, 2016 at 12:45:50AM +0200, Henrik Austad wrote:
> > edit: this turned out to be a somewhat lengthy answer. I have tried to
> > shorten it down somewhere. it is getting late and I'm
send just enough data, and that is why the gPTP domain is so important.
802.1Q gives you low latency through the network, but more importantly, no
dropped frames. gPTP gives you a central reference to time.
> [1] [alsa-lib][PATCH 0/9 v3] ctl: add APIs for control element set
> http://mailman.alsa-project.org/pipermail/alsa-devel/2016-June/109274.html
> [2] IEEE 1722-2011
> http://ieeexplore.ieee.org/servlet/opac?punumber=5764873
> [3] 5.5 Timing and Synchronization
> op. cit.
> [4] 1394 Open Host Controller Interface Specification
> http://download.microsoft.com/download/1/6/1/161ba512-40e2-4cc9-843a-923143f3456c/ohci_11.pdf
I hope this cleared some of the questions
--
Henrik Austad
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On Wed, Jun 15, 2016 at 01:49:08PM +0200, Richard Cochran wrote:
> Now that I understand better...
>
> On Sun, Jun 12, 2016 at 01:01:35AM +0200, Henrik Austad wrote:
> > Userspace is supposed to reserve bandwidth, find StreamID etc.
> >
> > To use as a Talker:
>
On Wed, Jun 15, 2016 at 09:04:41AM +0200, Richard Cochran wrote:
> On Tue, Jun 14, 2016 at 10:38:10PM +0200, Henrik Austad wrote:
> > Whereas I want to do
> >
> > aplay some_song.wav
>
> Can you please explain how your patches accomplish this?
In short:
modprobe
On Tue, Jun 14, 2016 at 08:26:15PM +0200, Richard Cochran wrote:
> On Tue, Jun 14, 2016 at 11:30:00AM +0200, Henrik Austad wrote:
> > So loop data from kernel -> userspace -> kernelspace and finally back to
> > userspace and the media application?
>
> Huh? I wonder wh
On Mon, Jun 13, 2016 at 09:32:10PM +0200, Richard Cochran wrote:
> On Mon, Jun 13, 2016 at 03:00:59PM +0200, Henrik Austad wrote:
> > On Mon, Jun 13, 2016 at 01:47:13PM +0200, Richard Cochran wrote:
> > > Which driver is that?
> >
> > drivers/net/ethernet/renesas/
&g
too far along but we probably don't want
> another mechanism to map hw queues/tcs/etc if the existing interfaces
> work or can be extended to support this.
Sure, I get that, as long as the complexity for setting up a link doesn't
go through the roof :)
Thanks!
--
Henrik Austad
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On Mon, Jun 13, 2016 at 01:47:13PM +0200, Richard Cochran wrote:
> Henrik,
Hi Richard,
> On Sun, Jun 12, 2016 at 01:01:28AM +0200, Henrik Austad wrote:
> > There are at least one AVB-driver (the AV-part of TSN) in the kernel
> > already,
>
> Which driver is that?
driv
On Sun, Jun 12, 2016 at 10:22:01PM -0400, Steven Rostedt wrote:
> On Sun, 12 Jun 2016 23:25:10 +0200
> Henrik Austad wrote:
>
> > > > +#include
> > > > +#include
> > > > +/* #include */
> > > > +
> > > > +/* FIXME: update t
On Sun, Jun 12, 2016 at 07:43:34PM +0900, Takashi Sakamoto wrote:
> On Jun 12 2016 17:31, Henrik Austad wrote:
> > On Sun, Jun 12, 2016 at 01:30:24PM +0900, Takashi Sakamoto wrote:
> >> On Jun 12 2016 12:38, Takashi Sakamoto wrote:
> >>> In your patcset, there's
On Sun, Jun 12, 2016 at 12:58:03PM -0400, Steven Rostedt wrote:
> On Sun, 12 Jun 2016 01:01:34 +0200
> Henrik Austad wrote:
>
> > From: Henrik Austad
> >
> > This needs refactoring and should be updated to use TRACE_CLASS, but for
> > now it provides a fair d
On Sun, Jun 12, 2016 at 12:35:10AM -0700, Joe Perches wrote:
> On Sun, 2016-06-12 at 00:22 +0200, Henrik Austad wrote:
> > From: Henrik Austad
> >
> > In short summary:
> >
> > * tsn_core.c is the main driver of tsn, all new links go through
> > here and
sn_buffer_write_net() and tsn_buffer_read_net()
> are involved in this discussion. You can see ALSA developers' struggle
> in USB audio device class drivers and (of cource) IEC 61883-1/6 drivers.)
Ah, good point. Any particular parts of the USB-subsystem I should start
looking a
lications.
> https://github.com/takaswie/alsa-firewire-report
Thanks, I'll dig into that, much appreciated
> (But I confirm that the report includes my misunderstandings in clause
> 3.4 and 6.2. need more time...)
ok, good to know
Thank you for your input, very much appreicated!
--
Henrik Austad
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From: Henrik Austad
This defines the general TSN headers for network packets, the
shim-interface and the central 'tsn_list' structure.
Cc: "David S. Miller"
Signed-off-by: Henrik Austad
---
include/linux/tsn.h | 806
orks-ish
What remains
- tie to (g)PTP properly, currently using ktime_get() for presentation
time
- get time from shim into TSN and vice versa
- let shim create/manage buffer
Henrik Austad (8):
TSN: add documentation
TSN: Add the standard formerly known as AVB to the kernel
Adding TSN-
From: Henrik Austad
This needs refactoring and should be updated to use TRACE_CLASS, but for
now it provides a fair debug-window into TSN.
Cc: "David S. Miller"
Cc: Steven Rostedt (maintainer:TRACING)
Cc: Ingo Molnar (maintainer:TRACING)
Signed-off-by: Henrik Austad
---
inc
From: Henrik Austad
In short summary:
* tsn_core.c is the main driver of tsn, all new links go through
here and all data to/form the shims are handled here
core also manages the shim-interface.
* tsn_configfs.c is the API to userspace. TSN is driven from userspace
and a link is created
From: Henrik Austad
Describe the overall design behind the TSN standard, the TSN-driver,
requirements to userspace and new functionality introduced.
Cc: "David S. Miller"
Signed-off-by: Henrik Austad
---
Documentation/TSN/tsn.txt | 147
that the core TSN driver can
use this when configuring a new NIC or setting up a new link.
Cc: "David S. Miller"
Signed-off-by: Henrik Austad
---
include/linux/netdevice.h | 32
net/Kconfig | 1 +
net/tsn/Kconfig
From: Henrik Austad
Not sure how relevant this is other than making a point about
maintaining it.
Signed-off-by: Henrik Austad
---
MAINTAINERS | 14 ++
1 file changed, 14 insertions(+)
diff --git a/MAINTAINERS b/MAINTAINERS
index ed42cb6..ef5d926 100644
--- a/MAINTAINERS
+++ b
From: Henrik Austad
This exposes a *very* rudimentary and simplistic ALSA driver that hooks
into TSN to create a device for userspace.
It currently only supports 44.1/48kHz sampling, 2ch, S16_LE
Userspace is supposed to reserve bandwidth, find StreamID etc.
To use as a Talker:
mkdir /config
er is *not* stable, it is still a work in
progress.
Cc: Jeff Kirsher
Cc: intel-wired-...@lists.osuosl.org
Cc: "David S. Miller"
Signed-off-by: Henrik Austad
---
drivers/net/ethernet/intel/Kconfig| 18 ++
drivers/net/ethernet/intel/igb/Makefile | 2 +-
drivers/net/ethe
clearing up netdev-typo
-H
On Sun, Jun 12, 2016 at 12:22:18AM +0200, Henrik Austad wrote:
> From: Henrik Austad
>
> In short summary:
>
> * tsn_core.c is the main driver of tsn, all new links go through
> here and all data to/form the shims are handled here
> core
Clearing up netdev-typo
-H
On Sun, Jun 12, 2016 at 12:22:17AM +0200, Henrik Austad wrote:
> From: Henrik Austad
>
> This defines the general TSN headers for network packets, the
> shim-interface and the central 'tsn_list' structure.
>
> Cc: "David S. Miller
clearing up netdev-typo
-H
On Sun, Jun 12, 2016 at 12:22:16AM +0200, Henrik Austad wrote:
> This adds support for loading the igb.ko module with tsn
> capabilities. This requires a 2-step approach. First enabling TSN in
> .config, then load the module with use_tsn=1.
>
> Once ena
Clearing up netdev-typo
-H
On Sun, Jun 12, 2016 at 12:22:17AM +0200, Henrik Austad wrote:
> From: Henrik Austad
>
> This defines the general TSN headers for network packets, the
> shim-interface and the central 'tsn_list' structure.
>
> Cc: "David S. Miller
clearing up netdev-typo
On Sun, Jun 12, 2016 at 12:22:15AM +0200, Henrik Austad wrote:
> TSN provides a mechanism to create reliable, jitter-free, low latency
> guaranteed bandwidth links over a local network. It does this by
> reserving a path through the network. Support for TSN must
On Sat, Jun 11, 2016 at 03:49:42PM -0700, David Miller wrote:
> From: Henrik Austad
> Date: Sun, 12 Jun 2016 00:47:28 +0200
>
> > What would be the best approach? Resend series to netdev@vger? I don't want
> > to spam too many lists either.
>
> Resend to all t
On Sun, Jun 12, 2016 at 12:22:14AM +0200, Henrik Austad wrote:
> From: Henrik Austad
Clearing up the netdev-typo
>
> Describe the overall design behind the TSN standard, the TSN-driver,
> requirements to userspace and new functionality introduced.
>
> Cc: "David S. M
On Sun, Jun 12, 2016 at 12:22:13AM +0200, Henrik Austad wrote:
> Hi all
Sorry.. I somehow managed to mess up the address to netdev, so if you feel
like replying to this, use this as it has the correct netdev-address.
again, sorry
> (series based on v4.7-rc2)
>
> This is a *very* e
ld be the best approach? Resend series to netdev@vger? I don't want
to spam too many lists either.
--
Henrik Austad
signature.asc
Description: Digital signature
From: Henrik Austad
This exposes a *very* rudimentary and simplistic ALSA driver that hooks
into TSN to create a device for userspace.
It currently only supports 44.1/48kHz sampling, 2ch, S16_LE
Userspace is supposed to reserve bandwidth, find StreamID etc.
To use as a Talker:
mkdir /config
From: Henrik Austad
In short summary:
* tsn_core.c is the main driver of tsn, all new links go through
here and all data to/form the shims are handled here
core also manages the shim-interface.
* tsn_configfs.c is the API to userspace. TSN is driven from userspace
and a link is created
that the core TSN driver can
use this when configuring a new NIC or setting up a new link.
Cc: "David S. Miller"
Signed-off-by: Henrik Austad
---
include/linux/netdevice.h | 32
net/Kconfig | 1 +
net/tsn/Kconfig
From: Henrik Austad
Not sure how relevant this is other than making a point about
maintaining it.
Signed-off-by: Henrik Austad
---
MAINTAINERS | 14 ++
1 file changed, 14 insertions(+)
diff --git a/MAINTAINERS b/MAINTAINERS
index ed42cb6..ef5d926 100644
--- a/MAINTAINERS
+++ b
- tie to (g)PTP properly, currently using ktime_get() for presentation
time
- get time from shim into TSN and vice versa
- let shim create/manage buffer
Henrik Austad (8):
TSN: add documentation
TSN: Add the standard formerly known as AVB to the kernel
Adding TSN-driver to Intel I210 contr
er is *not* stable, it is still a work in
progress.
Cc: Jeff Kirsher
Cc: intel-wired-...@lists.osuosl.org
Cc: "David S. Miller"
Signed-off-by: Henrik Austad
---
drivers/net/ethernet/intel/Kconfig| 18 ++
drivers/net/ethernet/intel/igb/Makefile | 2 +-
drivers/net/ethe
From: Henrik Austad
Describe the overall design behind the TSN standard, the TSN-driver,
requirements to userspace and new functionality introduced.
Cc: "David S. Miller"
Signed-off-by: Henrik Austad
---
Documentation/TSN/tsn.txt | 147
From: Henrik Austad
This defines the general TSN headers for network packets, the
shim-interface and the central 'tsn_list' structure.
Cc: "David S. Miller"
Signed-off-by: Henrik Austad
---
include/linux/tsn.h | 806
From: Henrik Austad
This needs refactoring and should be updated to use TRACE_CLASS, but for
now it provides a fair debug-window into TSN.
Cc: "David S. Miller"
Cc: Steven Rostedt (maintainer:TRACING)
Cc: Ingo Molnar (maintainer:TRACING)
Signed-off-by: Henrik Austad
---
inc
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