linux-usb.vger.kernel.org archive mirror
 help / color / mirror / Atom feed
* [PATCH v3 0/3] thunderbolt: Expose details about tunneling
@ 2021-03-29  7:41 Mika Westerberg
  2021-03-29  7:41 ` [PATCH v3 1/3] thunderbolt: Add details to router uevent Mika Westerberg
                   ` (3 more replies)
  0 siblings, 4 replies; 5+ messages in thread
From: Mika Westerberg @ 2021-03-29  7:41 UTC (permalink / raw)
  To: linux-usb
  Cc: Michael Jamet, Yehezkel Bernat, Andreas Noever, Lukas Wunner,
	Mario Limonciello, Christian Kellner, Benson Leung,
	Prashant Malani, Diego Rivas, Greg Kroah-Hartman,
	Mika Westerberg

Hello there,

There has been ask if we can expose more details about the connected
devices and the tunneling to userspace, so it can then provide more
detailed information to the user.

First we add uevent details for each device (USB4 router) that adds
USB4_TYPE=host|device|hub and USB4_VERSION=1.0 (if the device actually is
USB4). The host|device|hub definitions follow the USB4 spec.

Then for each device router we expose two new attributes: "usb3" and "dp"
that if present mean that the device has corresponding adapter (USB 3.x
upstream adapter and DP OUT adapter). The contents of the attributes then
hold number of tunnels ending to this router. So if USB 3.x is tunneled
"usb3" reads 1. Since there can be multiple DP OUT adaptes the "dp"
attribute holds number of DP tunnels ending to this router. For PCIe
tunneling the "authorized" attribute works the same way.

Previous versions can be found:

  v2: https://lore.kernel.org/linux-usb/20210323145701.86161-1-mika.westerberg@linux.intel.com/
  v1: https://lore.kernel.org/linux-usb/20210309134818.63118-1-mika.westerberg@linux.intel.com/

Changes from v2:

  * Added missing sysfs_emit()

Changes from v1:

  * Added Greg's Reviewed-by tags for patch 1 and 2
  * Use sysfs_emit()
  * Drop the locking in the new attributes
  * Drop the kobject_uevent()

Mika Westerberg (3):
  thunderbolt: Add details to router uevent
  thunderbolt: Hide authorized attribute if router does not support PCIe tunnels
  thunderbolt: Expose more details about USB 3.x and DisplayPort tunnels

 .../ABI/testing/sysfs-bus-thunderbolt         | 26 +++++++
 drivers/thunderbolt/domain.c                  | 10 +++
 drivers/thunderbolt/switch.c                  | 78 ++++++++++++++++++-
 drivers/thunderbolt/tb.c                      | 44 ++++++++---
 drivers/thunderbolt/tb.h                      |  4 +
 include/linux/thunderbolt.h                   |  6 ++
 6 files changed, 156 insertions(+), 12 deletions(-)

-- 
2.30.2


^ permalink raw reply	[flat|nested] 5+ messages in thread

end of thread, other threads:[~2021-04-09  9:33 UTC | newest]

Thread overview: 5+ messages (download: mbox.gz / follow: Atom feed)
-- links below jump to the message on this page --
2021-03-29  7:41 [PATCH v3 0/3] thunderbolt: Expose details about tunneling Mika Westerberg
2021-03-29  7:41 ` [PATCH v3 1/3] thunderbolt: Add details to router uevent Mika Westerberg
2021-03-29  7:41 ` [PATCH v3 2/3] thunderbolt: Hide authorized attribute if router does not support PCIe tunnels Mika Westerberg
2021-03-29  7:41 ` [PATCH v3 3/3] thunderbolt: Expose more details about USB 3.x and DisplayPort tunnels Mika Westerberg
2021-04-09  9:33 ` [PATCH v3 0/3] thunderbolt: Expose details about tunneling Mika Westerberg

This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).