linux-stable.git/drivers/thunderbolt/switch.c, branch v5.13.2

Merge tag 'thunderbolt-for-v5.13-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/westeri/thunderbolt into usb-next

2021-04-13T10:17:14+00:00

Mika writes:

thunderbolt: Changes for v5.13 merge window

This includes following Thunderbolt/USB4 changes for v5.13 merge window:

  * Debugfs improvements

  * Align the inter-domain (peer-to-peer) support with the USB4
    inter-domain spec for better interoperability

  * Add support for USB4 DROM and the new product descriptor

  * More KUnit tests

  * Detailed uevent for routers

  * Few miscellaneous improvements

All these have been in linux-next without reported issues.

* tag 'thunderbolt-for-v5.13-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/westeri/thunderbolt: (24 commits)
  thunderbolt: Hide authorized attribute if router does not support PCIe tunnels
  thunderbolt: Add details to router uevent
  thunderbolt: Unlock on error path in tb_domain_add()
  thunderbolt: Add support for USB4 DROM
  thunderbolt: Check quirks in tb_switch_add()
  thunderbolt: Add KUnit tests for DMA tunnels
  thunderbolt: Add KUnit tests for XDomain properties
  net: thunderbolt: Align the driver to the USB4 networking spec
  thunderbolt: Allow multiple DMA tunnels over a single XDomain connection
  thunderbolt: Drop unused tb_port_set_initial_credits()
  thunderbolt: Use dedicated flow control for DMA tunnels
  thunderbolt: Add support for maxhopid XDomain property
  thunderbolt: Add tb_property_copy_dir()
  thunderbolt: Align XDomain protocol timeouts with the spec
  thunderbolt: Use pseudo-random number as initial property block generation
  thunderbolt: Do not re-establish XDomain DMA paths automatically
  thunderbolt: Add more logging to XDomain connections
  Documentation / thunderbolt: Drop speed/lanes entries for XDomain
  thunderbolt: Decrease control channel timeout for software connection manager
  thunderbolt: Do not pass timeout for tb_cfg_reset()
  ...

thunderbolt: Hide authorized attribute if router does not support PCIe tunnels

2021-04-09T09:26:24+00:00

With USB4 devices PCIe tunneling is optional so for device routers
without PCIe upstream adapter it does not make much sense to expose the
authorized attribute. For this reason hide it if PCIe tunneling is not
supported by the device router.

Signed-off-by: Mika Westerberg 
Reviewed-by: Greg Kroah-Hartman

thunderbolt: Add details to router uevent

2021-04-09T09:26:10+00:00

Expose two environment variables for routers as part of the initial
uevent:

  USB4_VERSION=1.0
  USB4_TYPE=host|device|hub

Userspace can use this information to expose more details about each
connected device. Only USB4 devices have USB4_VERSION but all devices
have USB4_TYPE.

Signed-off-by: Mika Westerberg 
Reviewed-by: Greg Kroah-Hartman

thunderbolt: Check quirks in tb_switch_add()

2021-03-18T15:25:32+00:00

This makes it more visible on the main path of adding router.

Signed-off-by: Mika Westerberg

thunderbolt: Drop unused tb_port_set_initial_credits()

2021-03-18T15:25:31+00:00

This function is not used anymore in the driver so we can remove it.

Signed-off-by: Mika Westerberg

thunderbolt: Do not pass timeout for tb_cfg_reset()

2021-03-18T15:25:30+00:00

There is only one user for this function and it passes the default
timeout to it anyway, so remove the parameter completely. This is also
needed in the subsequent patch where we allow connection manager
implementations to use different timeout for non-raw control channel
messages.

Signed-off-by: Mika Westerberg

thunderbolt: Initialize HopID IDAs in tb_switch_alloc()

2021-03-08T11:22:35+00:00

If there is a failure before the tb_switch_add() is called the switch
object is released by tb_switch_release() but at that point HopID IDAs
have not yet been initialized. So we see splat like this:

BUG: spinlock bad magic on CPU#2, kworker/u8:5/115
...
Workqueue: thunderbolt0 tb_handle_hotplug
Call Trace:
 dump_stack+0x97/0xdc
 ? spin_bug+0x9a/0xa7
 do_raw_spin_lock+0x68/0x98
 _raw_spin_lock_irqsave+0x3f/0x5d
 ida_destroy+0x4f/0x127
 tb_switch_release+0x6d/0xfd
 device_release+0x2c/0x7d
 kobject_put+0x9b/0xbc
 tb_handle_hotplug+0x278/0x452
 process_one_work+0x1db/0x396
 worker_thread+0x216/0x375
 kthread+0x14d/0x155
 ? pr_cont_work+0x58/0x58
 ? kthread_blkcg+0x2e/0x2e
 ret_from_fork+0x1f/0x40

Fix this by always initializing HopID IDAs in tb_switch_alloc().

Fixes: 0b2863ac3cfd ("thunderbolt: Add functions for allocating and releasing HopIDs")
Cc: stable@vger.kernel.org
Reported-by: Chiranjeevi Rapolu 
Signed-off-by: Mika Westerberg

thunderbolt: Add support for PCIe tunneling disabled (SL5)

2021-02-04T07:45:24+00:00

Recent Intel Thunderbolt firmware connection manager has support for
another security level, SL5, that disables PCIe tunneling. This option
can be turned on from the BIOS.

When this is set the driver exposes a new security level "nopcie" to the
userspace and hides the authorized attribute under connected devices.

While there we also hide it when "dponly" security level is enabled
since it is not really usable in that case anyway.

Signed-off-by: Mika Westerberg 
Acked-by: Yehezkel Bernat

thunderbolt: switch: Fix kernel-doc descriptions of non-static functions

2021-02-04T07:38:38+00:00

Fix kernel-doc descriptions of all non-static functions. This also gets
rid of the warnings on W=1 build.

Reported-by: Lee Jones 
Signed-off-by: Mika Westerberg 
Reviewed-by: Lee Jones

thunderbolt: switch: Fix function name in the header

2021-01-28T10:57:06+00:00

Fixes the following W=1 kernel build warning(s):

 drivers/thunderbolt/switch.c:1322: warning: expecting prototype for reset_switch(). Prototype was for tb_switch_reset() instead

Cc: Andreas Noever 
Cc: Michael Jamet 
Cc: Yehezkel Bernat 
Cc: linux-usb@vger.kernel.org
Signed-off-by: Lee Jones 
Signed-off-by: Mika Westerberg