Commit Graph

480 Commits

Author SHA1 Message Date
Mika Westerberg bfa8f78e06 thunderbolt: Add KUnit tests for credit allocation
This adds a couple of KUnit tests for USB4 credit allocation.

Signed-off-by: Mika Westerberg <mika.westerberg@linux.intel.com>
2021-06-01 10:48:59 +03:00
Mika Westerberg 7c37bb304f thunderbolt: Add quirk for Intel Goshen Ridge DP credits
Intel Goshen Ridge reports wrong DP main credits in NVM 27 and earlier,
so add a quirk that fixes it. We also need to expand the quirk table to
match on hardware vendor/device IDs too.

Signed-off-by: Mika Westerberg <mika.westerberg@linux.intel.com>
2021-06-01 10:48:59 +03:00
Mika Westerberg 6ed541c53e thunderbolt: Allocate credits according to router preferences
The USB4 Connection Manager guide provides detailed information how the
USB4 router buffer (credit) allocation information should be used by the
connection manager when it allocates buffers for different paths. This
patch implements it for Linux. For USB 3.x and DisplayPort we use
directly the router preferences. The rest of the buffer space is then
used for PCIe and DMA (peer-to-peer, XDomain) traffic. DMA tunnels
require at least one buffer and PCIe six, so if there is not enough
buffers we fail the tunnel creation.

For the legacy Thunderbolt 1-3 devices we use the existing hard-coded
scheme except for DMA where we use the values suggested by the USB4 spec
chapter 13.

Co-developed-by: Gil Fine <gil.fine@intel.com>
Signed-off-by: Gil Fine <gil.fine@intel.com>
Signed-off-by: Mika Westerberg <mika.westerberg@linux.intel.com>
2021-06-01 10:48:59 +03:00
Mika Westerberg 69fea377e6 thunderbolt: Update port credits after bonding is enabled/disabled
Once lane bonding has been enabled (or disabled) both lane adapters may
update their total credits accordingly. For this reason re-read the port
credits after lane bonding has been enabled or disabled.

Signed-off-by: Mika Westerberg <mika.westerberg@linux.intel.com>
2021-06-01 10:48:59 +03:00
Mika Westerberg 56ad3aef5c thunderbolt: Read router preferred credit allocation information
USB4 routers must expose their preferred credit (buffer) allocation
information through router operation. This information tells the
connection manager how the router prefers its buffers to be allocated to
get the expected bandwidth for the supported protocols.

Read this information and store it as part of struct tb_switch for each
USB4 router.

Signed-off-by: Mika Westerberg <mika.westerberg@linux.intel.com>
2021-06-01 10:48:59 +03:00
Mika Westerberg e7051beab8 thunderbolt: Wait for the lanes to actually bond
It may take some time until the two lanes enter bonded state so poll for
the link width to match what is expected before going forward. This ensures
the link is in expected state before we start establishing paths through
it.

Signed-off-by: Mika Westerberg <mika.westerberg@linux.intel.com>
2021-06-01 10:48:59 +03:00
Mika Westerberg 02c5e7c2db thunderbolt: Move nfc_credits field to struct tb_path_hop
With the USB4 buffer allocation the number of credits (and non-flow
credits) may be different depending on the router buffer allocation
preferences. To allow this move the nfc_credits field to struct
tb_path_hop.

Signed-off-by: Mika Westerberg <mika.westerberg@linux.intel.com>
2021-06-01 10:48:59 +03:00
Mika Westerberg 1c561e4e65 thunderbolt: Make tb_port_type() take const parameter
The function does not modify the object in any way so make the parameter
const to reflect this.

No functional changes intended.

Signed-off-by: Mika Westerberg <mika.westerberg@linux.intel.com>
2021-06-01 10:48:59 +03:00
Mika Westerberg 3caf88871c thunderbolt: Align USB4 router wakes configuration with the CM guide
The USB4 Configuration Manager guide suggests that the USB4 port wakes
are configured in a certain way, like that when the port is configured
the wake-on-connect should not be set and so forth, so align the driver
with this.

Signed-off-by: Mika Westerberg <mika.westerberg@linux.intel.com>
2021-05-31 14:40:08 +03:00
Mika Westerberg 6026b703e8 thunderbolt: Add wake from DisplayPort
Latest USB4 spec added a new wake bit for DisplayPort so add this to the
driver when runtime suspending. This way wake up the domain when a new
monitor is plugged in to any of the device routers.

Also do the same for pre-USB4 devices through the link controller
registers as documented in chapter 13 of the USB4 spec.

Signed-off-by: Mika Westerberg <mika.westerberg@linux.intel.com>
2021-05-31 14:39:52 +03:00
Mika Westerberg 34163dfad4 thunderbolt: Use generic tb_nvm_[read|write]_data() for Thunderbolt 2/3 devices
Now that we have generic functionality available in nvm.c make the DMA
port code call it instead of duplicating the functionality.

Signed-off-by: Mika Westerberg <mika.westerberg@linux.intel.com>
2021-05-31 14:37:54 +03:00
Mika Westerberg 9b38303777 thunderbolt: Split NVM read/write generic functions out from usb4.c
We do this for Thunderbolt 2/3 devices through DMA port, USB4 devices
and retimers pretty much the same way. Only the actual block read/write
is different. For this reason split out the NVM read/write functions
from usb4.c to nvm.c and make USB4 device code call these when needed.

Signed-off-by: Mika Westerberg <mika.westerberg@linux.intel.com>
2021-05-31 14:37:48 +03:00
Crag Wang fe6f6f9591 thunderbolt: Add self-authenticate support for new dock
Add new device known to support self-authenticate on disconnect.

Signed-off-by: Crag Wang <crag.wang@dell.com>
Reviewed-by: Mario Limonciello <mario.limonciello@outlook.com>
Signed-off-by: Mika Westerberg <mika.westerberg@linux.intel.com>
2021-05-31 14:33:14 +03:00
Mathias Nyman 22c7a18ed5 thunderbolt: usb4: Fix NVM read buffer bounds and offset issue
Up to 64 bytes of data can be read from NVM in one go.
Read address must be dword aligned. Data is read into a local buffer.

If caller asks to read data starting at an unaligned address then full
dword is anyway read from NVM into a local buffer. Data is then copied
from the local buffer starting at the unaligned offset to the caller
buffer.

In cases where asked data length + unaligned offset is over 64 bytes
we need to make sure we don't read past the 64 bytes in the local
buffer when copying to caller buffer, and make sure that we don't
skip copying unaligned offset bytes from local buffer anymore after
the first round of 64 byte NVM data read.

Fixes: b04079837b ("thunderbolt: Add initial support for USB4")
Cc: stable@vger.kernel.org
Signed-off-by: Mathias Nyman <mathias.nyman@linux.intel.com>
Signed-off-by: Mika Westerberg <mika.westerberg@linux.intel.com>
2021-05-20 11:52:58 +03:00
Mathias Nyman b106776080 thunderbolt: dma_port: Fix NVM read buffer bounds and offset issue
Up to 64 bytes of data can be read from NVM in one go. Read address
must be dword aligned. Data is read into a local buffer.

If caller asks to read data starting at an unaligned address then full
dword is anyway read from NVM into a local buffer. Data is then copied
from the local buffer starting at the unaligned offset to the caller
buffer.

In cases where asked data length + unaligned offset is over 64 bytes
we need to make sure we don't read past the 64 bytes in the local
buffer when copying to caller buffer, and make sure that we don't
skip copying unaligned offset bytes from local buffer anymore after
the first round of 64 byte NVM data read.

Fixes: 3e13676862 ("thunderbolt: Add support for DMA configuration based mailbox")
Cc: stable@vger.kernel.org
Signed-off-by: Mathias Nyman <mathias.nyman@linux.intel.com>
Signed-off-by: Mika Westerberg <mika.westerberg@linux.intel.com>
2021-05-20 11:52:52 +03:00
Greg Kroah-Hartman 5367f82a21 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.
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Merge tag 'thunderbolt-for-v5.13-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/westeri/thunderbolt into usb-next

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()
  ...
2021-04-13 12:17:14 +02:00
Mika Westerberg 6f3badead6 thunderbolt: Hide authorized attribute if router does not support PCIe tunnels
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 <mika.westerberg@linux.intel.com>
Reviewed-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2021-04-09 12:26:24 +03:00
Mika Westerberg 2f608ba196 thunderbolt: Add details to router uevent
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 <mika.westerberg@linux.intel.com>
Reviewed-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2021-04-09 12:26:10 +03:00
Dan Carpenter 08fe7ae185 thunderbolt: Fix off by one in tb_port_find_retimer()
This array uses 1-based indexing so it corrupts memory one element
beyond of the array.  Fix it by making the array one element larger.

Fixes: dacb12877d ("thunderbolt: Add support for on-board retimers")
Cc: stable@vger.kernel.org
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Mika Westerberg <mika.westerberg@linux.intel.com>
2021-03-30 13:38:10 +03:00
Dan Carpenter bec4d7c93a thunderbolt: Fix a leak in tb_retimer_add()
After the device_register() succeeds, then the correct way to clean up
is to call device_unregister().  The unregister calls both device_del()
and device_put().  Since this code was only device_del() it results in
a memory leak.

Fixes: dacb12877d ("thunderbolt: Add support for on-board retimers")
Cc: stable@vger.kernel.org
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Reviewed-by: Jason Gunthorpe <jgg@nvidia.com>
Signed-off-by: Mika Westerberg <mika.westerberg@linux.intel.com>
2021-03-30 13:37:32 +03:00
Dan Carpenter 2e7a5b3e22 thunderbolt: Unlock on error path in tb_domain_add()
We accidentally deleted this unlock on the error path.  Undelete it.

Fixes: 7f0a34d790 ("thunderbolt: Decrease control channel timeout for software connection manager")
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Mika Westerberg <mika.westerberg@linux.intel.com>
2021-03-23 17:09:34 +03:00
Mika Westerberg 3231307e39 thunderbolt: Add support for USB4 DROM
USB4 router DROM differs sligthly from Thunderbolt 1-3 DROM. For
instance it does not include UID and CRC8 in the header section, and it
has product descriptor genereric entry to describe the product IDs and
related information. If the "Version" field in the DROM header section
reads 3 it means the router only has USB4 DROM and if it reads 1 it
means the router supports TBT3 compatible DROM.

For this reason, update the DROM parsing code to support "pure" USB4
DROMs too.

While there drop the extra empty line at the end of tb_drom_read().

Signed-off-by: Mika Westerberg <mika.westerberg@linux.intel.com>
2021-03-18 18:25:32 +03:00
Mika Westerberg e23a5afd01 thunderbolt: Check quirks in tb_switch_add()
This makes it more visible on the main path of adding router.

Signed-off-by: Mika Westerberg <mika.westerberg@linux.intel.com>
2021-03-18 18:25:32 +03:00
Mika Westerberg 5adab6cc45 thunderbolt: Add KUnit tests for DMA tunnels
Add a couple of tests to check DMA tunneling functionality.

Signed-off-by: Mika Westerberg <mika.westerberg@linux.intel.com>
2021-03-18 18:25:32 +03:00
Mika Westerberg 15a4c7e8f9 thunderbolt: Add KUnit tests for XDomain properties
This adds KUnit tests for parsing, formatting and copying of XDomain
properties.

Signed-off-by: Mika Westerberg <mika.westerberg@linux.intel.com>
2021-03-18 18:25:32 +03:00
Mika Westerberg 180b068942 thunderbolt: Allow multiple DMA tunnels over a single XDomain connection
Currently we have had an artificial limitation of a single DMA tunnel
per XDomain connection. However, hardware wise there is no such limit
and software based connection manager can take advantage of all the DMA
rings available on the host to establish tunnels.

For this reason make the tb_xdomain_[enable|disable]_paths() to take the
DMA ring and HopID as parameter instead of storing them in the struct
tb_xdomain. We also add API functions to allocate input and output
HopIDs of the XDomain connection that the service drivers can use
instead of hard-coding.

Also convert the two existing service drivers over to this API.

Signed-off-by: Mika Westerberg <mika.westerberg@linux.intel.com>
2021-03-18 18:25:31 +03:00
Mika Westerberg 5cfdd300b7 thunderbolt: Drop unused tb_port_set_initial_credits()
This function is not used anymore in the driver so we can remove it.

Signed-off-by: Mika Westerberg <mika.westerberg@linux.intel.com>
2021-03-18 18:25:31 +03:00
Mika Westerberg e5876559b5 thunderbolt: Use dedicated flow control for DMA tunnels
The USB4 inter-domain service spec recommends using dedicated flow
control scheme so update the driver accordingly.

Signed-off-by: Mika Westerberg <mika.westerberg@linux.intel.com>
2021-03-18 18:25:31 +03:00
Mika Westerberg 46b494f286 thunderbolt: Add support for maxhopid XDomain property
USB4 inter-domain spec mandates that the compatible hosts expose a new
property "maxhopid" that tells the connection manager on the other side
what is the maximum supported input HopID over the connection. Since
this is depend on the lane adapter the cable is connected it needs to be
filled in dynamically.

For this reason we take a copy of the global properties and fill then
for each XDomain connection upon first connect, and then keep updating
it if the generation changes as services are being added/removed. We
also take advantage of this copy to fill in the hostname.

We also expose this maxhopid as an attribute under each XDomain device.

While there drop kernel-doc entry for property_lock which seems to be
left there when the structure was originally introduced.

Signed-off-by: Mika Westerberg <mika.westerberg@linux.intel.com>
2021-03-18 18:25:31 +03:00
Mika Westerberg 7d3084c0b7 thunderbolt: Add tb_property_copy_dir()
This function takes a deep copy of the properties. We need this in order
to support more dynamic properties per XDomain connection as required by
the USB4 inter-domain service spec.

Signed-off-by: Mika Westerberg <mika.westerberg@linux.intel.com>
2021-03-18 18:25:31 +03:00
Mika Westerberg 3bb163331e thunderbolt: Align XDomain protocol timeouts with the spec
The USB4 inter-domain service spec has slightly different recommended
timeouts for the XDomain protocol so align the driver with those.

Signed-off-by: Mika Westerberg <mika.westerberg@linux.intel.com>
2021-03-18 18:25:31 +03:00
Mika Westerberg a6932c3f9e thunderbolt: Use pseudo-random number as initial property block generation
As recommended by USB4 inter-domain service spec use pseudo-random value
instead of zero as initial XDomain property block generation value.

Signed-off-by: Mika Westerberg <mika.westerberg@linux.intel.com>
2021-03-18 18:25:31 +03:00
Mika Westerberg 8ccbed2476 thunderbolt: Do not re-establish XDomain DMA paths automatically
This step is actually not needed. The service drivers themselves will
handle this once they have negotiated the service up and running again
with the remote side. Also dropping this makes it easier to add support
for multiple DMA tunnels over a single XDomain connection.

Signed-off-by: Mika Westerberg <mika.westerberg@linux.intel.com>
2021-03-18 18:25:30 +03:00
Mika Westerberg d29c59b1a4 thunderbolt: Add more logging to XDomain connections
Currently the driver is pretty quiet when another host is connected
which makes debugging possible issues harder. For this reason add more
logging on debug level that can be turned on as needed.

While there log the host-to-host connection on info level analogous to
routers and retimers.

Signed-off-by: Mika Westerberg <mika.westerberg@linux.intel.com>
2021-03-18 18:25:30 +03:00
Mika Westerberg 7f0a34d790 thunderbolt: Decrease control channel timeout for software connection manager
When the firmware connection manager is not proxying between the
software and the hardware we can decrease the timeout for control
packets significantly. The USB4 spec recommends 10 ms +- 1 ms but we use
slightly larger value (100 ms) which is recommendation from Intel
Thunderbolt firmware folks. When firmware connection manager is running
then we keep using the existing 5000 ms.

To implement this we move the control channel allocation to
tb_domain_alloc(), and pass the timeout from that function to the
tb_ctl_alloc(). Then make both connection manager implementations pass
the timeout when they alloc the domain structure.

While there update kernel-doc of struct tb_ctl to match the reality.

Signed-off-by: Mika Westerberg <mika.westerberg@linux.intel.com>
2021-03-18 18:25:30 +03:00
Mika Westerberg bda83aeca3 thunderbolt: Do not pass timeout for tb_cfg_reset()
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 <mika.westerberg@linux.intel.com>
2021-03-18 18:25:30 +03:00
Mika Westerberg 61ec15e553 thunderbolt: Disable retry logic for intra-domain control packets
In most cases the response packet is lost because the router in question
was disconnected by the user. Resending the control packet in that case
just adds unnecessary delays, so disable that for intra-domain control
packets. For inter-domain (XDomain) packets we continue retrying.

This also aligns the driver better what the Intel connection manager
firmware is doing.

Signed-off-by: Mika Westerberg <mika.westerberg@linux.intel.com>
2021-03-18 18:25:30 +03:00
Gil Fine 3382665a5c thunderbolt: debugfs: Show all accessible dwords
Currently, when first failure occurs while reading of the block,
we stop reading the block and jump to the next capability.
This doesn't cover the case of block with "holes" of inaccessible
dwords, followed by accessible dwords.
This patch address this problem.
In case of failure while reading the complete block in one transaction,
(because of one or more dwords is inaccessible), we read the remaining
dwords of the block dword-by-dword, one dword per transaction,
till the end of the block.
By doing this, we handle the case of block with "holes" of inaccessible
dwords, followed by accessible dwords. The accessible dwords are shown
with the fields: <offset> <relative_offset> <cap_id> <vs_cap_id> <value>
E.g.:
0x01eb  236 0x05 0x06 0x0000d166
While the inaccesible dwords are shown as: <offset> <not accessible>
E.g.:
0x01ed <not accessible>

Signed-off-by: Gil Fine <gil.fine@intel.com>
Signed-off-by: Mika Westerberg <mika.westerberg@linux.intel.com>
2021-03-12 13:13:34 +03:00
Mika Westerberg c94732bda0 thunderbolt: Increase runtime PM reference count on DP tunnel discovery
If the driver is unbound and then bound back it goes over the topology
and figure out the existing tunnels. However, if it finds DP tunnel it
should make sure the domain does not runtime suspend as otherwise it
will tear down the DP tunnel unexpectedly.

Fixes: 6ac6faee5d ("thunderbolt: Add runtime PM for Software CM")
Cc: stable@vger.kernel.org
Signed-off-by: Mika Westerberg <mika.westerberg@linux.intel.com>
2021-03-08 14:22:42 +03:00
Mika Westerberg 781e14eaa7 thunderbolt: Initialize HopID IDAs in tb_switch_alloc()
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: 0b2863ac3c ("thunderbolt: Add functions for allocating and releasing HopIDs")
Cc: stable@vger.kernel.org
Reported-by: Chiranjeevi Rapolu <chiranjeevi.rapolu@intel.com>
Signed-off-by: Mika Westerberg <mika.westerberg@linux.intel.com>
2021-03-08 14:22:35 +03:00
Gil Fine d59b8faa04 thunderbolt: Drop unused functions tb_switch_is_[ice|tiger]_lake()
Drop the two functions not used anymore in the driver.

Signed-off-by: Gil Fine <gil.fine@intel.com>
Signed-off-by: Mika Westerberg <mika.westerberg@linux.intel.com>
2021-03-08 13:41:40 +03:00
Gil Fine 815f421b6f thunderbolt: debugfs: Handle fail reading block
There are cases when reading block of dwords in single transaction fail,
for several reasons, mostly if HW publish to implement all of the dwords,
while actually it doesn't or if some dwords not accessible for read
for security reasons. We handle these cases by trying to read the block,
dword-by-dword, one dword per transaction, till we get a failure.

Signed-off-by: Gil Fine <gil.fine@intel.com>
Signed-off-by: Mika Westerberg <mika.westerberg@linux.intel.com>
2021-03-08 13:41:40 +03:00
Greg Kroah-Hartman 0a25669ba8 thunderbolt: Changes for v5.12 merge window
This includes following Thunderbolt/USB4 changes for v5.12 merge
 window:
 
   * Start lane initialization after sleep for Thunderbolt 3 compatible
     devices
 
   * Add support for de-authorizing PCIe tunnels (software based
     connection manager only)
 
   * Add support for new ACPI 6.4 USB4 _OSC
 
   * Allow disabling XDomain protocol
 
   * Add support for new SL5 security level
 
   * Clean up kernel-docs to pass W=1 builds
 
   * A couple of cleanups and minor fixes
 
 All these have been in linux-next without reported issues.
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Merge tag 'thunderbolt-for-v5.12-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/westeri/thunderbolt into usb-next

Mika writes:

thunderbolt: Changes for v5.12 merge window

This includes following Thunderbolt/USB4 changes for v5.12 merge
window:

  * Start lane initialization after sleep for Thunderbolt 3 compatible
    devices

  * Add support for de-authorizing PCIe tunnels (software based
    connection manager only)

  * Add support for new ACPI 6.4 USB4 _OSC

  * Allow disabling XDomain protocol

  * Add support for new SL5 security level

  * Clean up kernel-docs to pass W=1 builds

  * A couple of cleanups and minor fixes

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

* tag 'thunderbolt-for-v5.12-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/westeri/thunderbolt: (27 commits)
  thunderbolt: Add support for native USB4 _OSC
  ACPI: Add support for native USB4 control _OSC
  ACPI: Execute platform _OSC also with query bit clear
  thunderbolt: Allow disabling XDomain protocol
  thunderbolt: Add support for PCIe tunneling disabled (SL5)
  thunderbolt: dma_test: Drop unnecessary include
  thunderbolt: Add clarifying comments about USB4 terms router and adapter
  thunderbolt: switch: Fix kernel-doc descriptions of non-static functions
  thunderbolt: nhi: Fix kernel-doc descriptions of non-static functions
  thunderbolt: path: Fix kernel-doc descriptions of non-static functions
  thunderbolt: eeprom: Fix kernel-doc descriptions of non-static functions
  thunderbolt: ctl: Fix kernel-doc descriptions of non-static functions
  thunderbolt: switch: Fix function name in the header
  thunderbolt: tunnel: Fix misspelling of 'receive_path'
  thunderbolt: icm: Fix a couple of formatting issues
  thunderbolt: switch: Demote a bunch of non-conformant kernel-doc headers
  thunderbolt: tb: Kernel-doc function headers should document their parameters
  thunderbolt: nhi: Demote some non-conformant kernel-doc headers
  thunderbolt: xdomain: Fix 'tb_unregister_service_driver()'s 'drv' param
  thunderbolt: eeprom: Demote non-conformant kernel-doc headers to standard comment blocks
  ...
2021-02-09 13:00:07 +01:00
Mika Westerberg c6da62a219 thunderbolt: Add support for native USB4 _OSC
ACPI 6.4 introduced a new _OSC capability used to negotiate whether the
OS is supposed to use Software (native) or Firmware based Connection
Manager. If the native support is granted then there are set of bits
that enable/disable different tunnel types that the Software Connection
Manager is allowed to tunnel.

This adds support for this new USB4 _OSC accordingly. When PCIe
tunneling is disabled then the driver switches security level to be
"nopcie" following the security level 5 used in Firmware based
Connection Manager.

Signed-off-by: Mika Westerberg <mika.westerberg@linux.intel.com>
Acked-by: Yehezkel Bernat <YehezkelShB@gmail.com>
2021-02-04 10:45:25 +03:00
Mika Westerberg 5ca6768825 thunderbolt: Allow disabling XDomain protocol
This allows disabling XDomain protocol completely if the user does not
plan to use the USB4/Thunderbolt peer-to-peer functionality, or for
security reasons.

XDomain protocol is enabled by default but with this commit it is
possible to disable it by passing "xdomain=0" as module parameter (or
through the kernel command line).

Signed-off-by: Mika Westerberg <mika.westerberg@linux.intel.com>
Acked-by: Yehezkel Bernat <YehezkelShB@gmail.com>
2021-02-04 10:45:25 +03:00
Mika Westerberg 3cd542e6e6 thunderbolt: Add support for PCIe tunneling disabled (SL5)
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 <mika.westerberg@linux.intel.com>
Acked-by: Yehezkel Bernat <YehezkelShB@gmail.com>
2021-02-04 10:45:24 +03:00
Mika Westerberg 8b0ab503c0 thunderbolt: dma_test: Drop unnecessary include
It seems <linux/acpi.h> is not actually needed in this driver so we can
drop it.

Signed-off-by: Mika Westerberg <mika.westerberg@linux.intel.com>
2021-02-04 10:39:13 +03:00
Mika Westerberg c3963a5563 thunderbolt: Add clarifying comments about USB4 terms router and adapter
USB4 spec talks about routers and adapters whereas Thunderbolt 1-3
talked about CIO (Converged I/O) switches and ports. These are the same
thing but might cause confusion so add clarifying comments to struct
tb_switch and struct tb_port about the USB4 terms.

Signed-off-by: Mika Westerberg <mika.westerberg@linux.intel.com>
2021-02-04 10:38:38 +03:00
Mika Westerberg 5c6b471b6c thunderbolt: switch: Fix kernel-doc descriptions of non-static functions
Fix kernel-doc descriptions of all non-static functions. This also gets
rid of the warnings on W=1 build.

Reported-by: Lee Jones <lee.jones@linaro.org>
Signed-off-by: Mika Westerberg <mika.westerberg@linux.intel.com>
Reviewed-by: Lee Jones <lee.jones@linaro.org>
2021-02-04 10:38:38 +03:00
Mika Westerberg 6894bd3753 thunderbolt: nhi: Fix kernel-doc descriptions of non-static functions
Fix kernel-doc descriptions of the two non-static functions. This also
gets rids of the warnings on W=1 build.

Reported-by: Lee Jones <lee.jones@linaro.org>
Signed-off-by: Mika Westerberg <mika.westerberg@linux.intel.com>
Reviewed-by: Lee Jones <lee.jones@linaro.org>
2021-02-04 10:38:38 +03:00
Mika Westerberg 5fbcb2d127 thunderbolt: path: Fix kernel-doc descriptions of non-static functions
Fix kernel-doc descriptions of the two non-static functions. This also
gets rid of the warnings on W=1 build.

Reported-by: Lee Jones <lee.jones@linaro.org>
Signed-off-by: Mika Westerberg <mika.westerberg@linux.intel.com>
Reviewed-by: Lee Jones <lee.jones@linaro.org>
2021-02-04 10:38:37 +03:00
Mika Westerberg b12e4824f1 thunderbolt: eeprom: Fix kernel-doc descriptions of non-static functions
Fix kernel-doc descriptions of the two non-static functions. This also
gets rid of the rest of the warnings on W=1 build.

Reported-by: Lee Jones <lee.jones@linaro.org>
Signed-off-by: Mika Westerberg <mika.westerberg@linux.intel.com>
Reviewed-by: Lee Jones <lee.jones@linaro.org>
2021-02-04 10:38:37 +03:00
Mika Westerberg 9c3db0b7b2 thunderbolt: ctl: Fix kernel-doc descriptions of non-static functions
Fix kernel-doc descriptions of all non-static functions and struct
tb_cfg. Gets rid of several warnings on W=1 builds too.

Reported-by: Lee Jones <lee.jones@linaro.org>
Signed-off-by: Mika Westerberg <mika.westerberg@linux.intel.com>
Reviewed-by: Lee Jones <lee.jones@linaro.org>
2021-02-04 10:38:37 +03:00
Mario Limonciello 4d395c5e74 thunderbolt: Fix possible NULL pointer dereference in tb_acpi_add_link()
When we walk up the device hierarchy in tb_acpi_add_link() make sure we
break the loop if the device has no parent. Otherwise we may crash the
kernel by dereferencing a NULL pointer.

Fixes: b2be2b05cf ("thunderbolt: Create device links from ACPI description")
Cc: stable@vger.kernel.org
Signed-off-by: Mario Limonciello <mario.limonciello@dell.com>
Acked-by: Yehezkel Bernat <YehezkelShB@gmail.com>
Signed-off-by: Mika Westerberg <mika.westerberg@linux.intel.com>
2021-01-28 15:30:57 +03:00
Lee Jones 2c2a2327bd thunderbolt: switch: Fix function name in the header
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 <andreas.noever@gmail.com>
Cc: Michael Jamet <michael.jamet@intel.com>
Cc: Yehezkel Bernat <YehezkelShB@gmail.com>
Cc: linux-usb@vger.kernel.org
Signed-off-by: Lee Jones <lee.jones@linaro.org>
Signed-off-by: Mika Westerberg <mika.westerberg@linux.intel.com>
2021-01-28 13:57:06 +03:00
Lee Jones a27ea0dfc1 thunderbolt: tunnel: Fix misspelling of 'receive_path'
Fixes the following W=1 kernel build warning(s):

 drivers/thunderbolt/tunnel.c:841: warning: Function parameter or member 'receive_path' not described in 'tb_tunnel_alloc_dma'
 drivers/thunderbolt/tunnel.c:841: warning: Excess function parameter 'reveive_path' description in 'tb_tunnel_alloc_dma'

Cc: Andreas Noever <andreas.noever@gmail.com>
Cc: Michael Jamet <michael.jamet@intel.com>
Cc: Yehezkel Bernat <YehezkelShB@gmail.com>
Cc: linux-usb@vger.kernel.org
Signed-off-by: Lee Jones <lee.jones@linaro.org>
Signed-off-by: Mika Westerberg <mika.westerberg@linux.intel.com>
2021-01-28 13:57:06 +03:00
Lee Jones af6bd59ea5 thunderbolt: icm: Fix a couple of formatting issues
Fixes the following W=1 kernel build warning(s):

 drivers/thunderbolt/icm.c:122: warning: Function parameter or member 'xdomain_connected' not described in 'icm'
 drivers/thunderbolt/icm.c:122: warning: Function parameter or member 'xdomain_disconnected' not described in 'icm'

Cc: Andreas Noever <andreas.noever@gmail.com>
Cc: Michael Jamet <michael.jamet@intel.com>
Cc: Yehezkel Bernat <YehezkelShB@gmail.com>
Cc: linux-usb@vger.kernel.org
Signed-off-by: Lee Jones <lee.jones@linaro.org>
Signed-off-by: Mika Westerberg <mika.westerberg@linux.intel.com>
2021-01-28 13:55:01 +03:00
Lee Jones 47ba5ae46b thunderbolt: switch: Demote a bunch of non-conformant kernel-doc headers
Fixes the following W=1 kernel build warning(s):

 drivers/thunderbolt/switch.c:730: warning: Function parameter or member 'port' not described in 'tb_init_port'
 drivers/thunderbolt/switch.c:1348: warning: Function parameter or member 'sw' not described in 'tb_plug_events_active'
 drivers/thunderbolt/switch.c:1348: warning: Function parameter or member 'active' not described in 'tb_plug_events_active'

Cc: Andreas Noever <andreas.noever@gmail.com>
Cc: Michael Jamet <michael.jamet@intel.com>
Cc: Yehezkel Bernat <YehezkelShB@gmail.com>
Cc: linux-usb@vger.kernel.org
Signed-off-by: Lee Jones <lee.jones@linaro.org>
[ mw: Demote only static functions ]
Signed-off-by: Mika Westerberg <mika.westerberg@linux.intel.com>
2021-01-28 13:52:24 +03:00
Lee Jones 877e50b358 thunderbolt: tb: Kernel-doc function headers should document their parameters
Fixes the following W=1 kernel build warning(s):

 drivers/thunderbolt/tb.c:535: warning: Function parameter or member 'sw' not described in 'tb_scan_switch'
 drivers/thunderbolt/tb.c:551: warning: Function parameter or member 'port' not described in 'tb_scan_port'
 drivers/thunderbolt/tb.c:711: warning: Function parameter or member 'tb' not described in 'tb_free_invalid_tunnels'
 drivers/thunderbolt/tb.c:726: warning: Function parameter or member 'sw' not described in 'tb_free_unplugged_children'
 drivers/thunderbolt/tb.c:1129: warning: Function parameter or member 'work' not described in 'tb_handle_hotplug'
 drivers/thunderbolt/tb.c:1239: warning: Function parameter or member 'tb' not described in 'tb_handle_event'
 drivers/thunderbolt/tb.c:1239: warning: Function parameter or member 'type' not described in 'tb_handle_event'
 drivers/thunderbolt/tb.c:1239: warning: Function parameter or member 'buf' not described in 'tb_handle_event'
 drivers/thunderbolt/tb.c:1239: warning: Function parameter or member 'size' not described in 'tb_handle_event'
 drivers/thunderbolt/tb.c:1239: warning: expecting prototype for tb_schedule_hotplug_handler(). Prototype was for tb_handle_event() instead

Cc: Andreas Noever <andreas.noever@gmail.com>
Cc: Michael Jamet <michael.jamet@intel.com>
Cc: Yehezkel Bernat <YehezkelShB@gmail.com>
Cc: linux-usb@vger.kernel.org
Signed-off-by: Lee Jones <lee.jones@linaro.org>
Signed-off-by: Mika Westerberg <mika.westerberg@linux.intel.com>
2021-01-28 13:44:24 +03:00
Lee Jones a7bfb27bee thunderbolt: nhi: Demote some non-conformant kernel-doc headers
Fixes the following W=1 kernel build warning(s):

 drivers/thunderbolt/nhi.c:53: warning: Function parameter or member 'ring' not described in 'ring_interrupt_active'
 drivers/thunderbolt/nhi.c:53: warning: Function parameter or member 'active' not described in 'ring_interrupt_active'
 drivers/thunderbolt/nhi.c:114: warning: Function parameter or member 'nhi' not described in 'nhi_disable_interrupts'
 drivers/thunderbolt/nhi.c:191: warning: Function parameter or member 'ring' not described in 'ring_write_descriptors'
 drivers/thunderbolt/nhi.c:225: warning: Function parameter or member 'work' not described in 'ring_work'

Cc: Andreas Noever <andreas.noever@gmail.com>
Cc: Michael Jamet <michael.jamet@intel.com>
Cc: Yehezkel Bernat <YehezkelShB@gmail.com>
Cc: linux-usb@vger.kernel.org
Signed-off-by: Lee Jones <lee.jones@linaro.org>
[ mw: Demote only static functions ]
Signed-off-by: Mika Westerberg <mika.westerberg@linux.intel.com>
2021-01-28 13:41:22 +03:00
Lee Jones 925a2af9b3 thunderbolt: xdomain: Fix 'tb_unregister_service_driver()'s 'drv' param
Fixes the following W=1 kernel build warning(s):

 drivers/thunderbolt/xdomain.c:678: warning: Function parameter or member 'drv' not described in 'tb_unregister_service_driver'
 drivers/thunderbolt/xdomain.c:678: warning: Excess function parameter 'xdrv' description in 'tb_unregister_service_driver'

Cc: Andreas Noever <andreas.noever@gmail.com>
Cc: Michael Jamet <michael.jamet@intel.com>
Cc: Yehezkel Bernat <YehezkelShB@gmail.com>
Cc: Alexei Starovoitov <ast@kernel.org>
Cc: Daniel Borkmann <daniel@iogearbox.net>
Cc: "David S. Miller" <davem@davemloft.net>
Cc: Jakub Kicinski <kuba@kernel.org>
Cc: Jesper Dangaard Brouer <hawk@kernel.org>
Cc: John Fastabend <john.fastabend@gmail.com>
Cc: linux-usb@vger.kernel.org
Cc: netdev@vger.kernel.org
Cc: bpf@vger.kernel.org
Signed-off-by: Lee Jones <lee.jones@linaro.org>
Signed-off-by: Mika Westerberg <mika.westerberg@linux.intel.com>
2021-01-28 13:32:29 +03:00
Lee Jones ff48bc4477 thunderbolt: eeprom: Demote non-conformant kernel-doc headers to standard comment blocks
Fixes the following W=1 kernel build warning(s):

 drivers/thunderbolt/eeprom.c:19: warning: Function parameter or member 'sw' not described in 'tb_eeprom_ctl_write'
 drivers/thunderbolt/eeprom.c:19: warning: Function parameter or member 'ctl' not described in 'tb_eeprom_ctl_write'
 drivers/thunderbolt/eeprom.c:27: warning: Function parameter or member 'sw' not described in 'tb_eeprom_ctl_read'
 drivers/thunderbolt/eeprom.c:27: warning: Function parameter or member 'ctl' not described in 'tb_eeprom_ctl_read'
 drivers/thunderbolt/eeprom.c:27: warning: expecting prototype for tb_eeprom_ctl_write(). Prototype was for tb_eeprom_ctl_read() instead
 drivers/thunderbolt/eeprom.c:43: warning: Function parameter or member 'sw' not described in 'tb_eeprom_active'
 drivers/thunderbolt/eeprom.c:43: warning: Function parameter or member 'enable' not described in 'tb_eeprom_active'
 drivers/thunderbolt/eeprom.c:73: warning: Function parameter or member 'sw' not described in 'tb_eeprom_transfer'
 drivers/thunderbolt/eeprom.c:73: warning: Function parameter or member 'ctl' not described in 'tb_eeprom_transfer'
 drivers/thunderbolt/eeprom.c:73: warning: Function parameter or member 'direction' not described in 'tb_eeprom_transfer'
 drivers/thunderbolt/eeprom.c:97: warning: Function parameter or member 'sw' not described in 'tb_eeprom_out'
 drivers/thunderbolt/eeprom.c:97: warning: Function parameter or member 'val' not described in 'tb_eeprom_out'
 drivers/thunderbolt/eeprom.c:117: warning: Function parameter or member 'sw' not described in 'tb_eeprom_in'
 drivers/thunderbolt/eeprom.c:117: warning: Function parameter or member 'val' not described in 'tb_eeprom_in'
 drivers/thunderbolt/eeprom.c:138: warning: Function parameter or member 'sw' not described in 'tb_eeprom_get_drom_offset'
 drivers/thunderbolt/eeprom.c:138: warning: Function parameter or member 'offset' not described in 'tb_eeprom_get_drom_offset'
 drivers/thunderbolt/eeprom.c:170: warning: Function parameter or member 'sw' not described in 'tb_eeprom_read_n'
 drivers/thunderbolt/eeprom.c:170: warning: Function parameter or member 'offset' not described in 'tb_eeprom_read_n'
 drivers/thunderbolt/eeprom.c:170: warning: Function parameter or member 'val' not described in 'tb_eeprom_read_n'
 drivers/thunderbolt/eeprom.c:170: warning: Function parameter or member 'count' not described in 'tb_eeprom_read_n'
 drivers/thunderbolt/eeprom.c:383: warning: Function parameter or member 'sw' not described in 'tb_drom_parse_entries'
 drivers/thunderbolt/eeprom.c:417: warning: Function parameter or member 'sw' not described in 'tb_drom_copy_efi'
 drivers/thunderbolt/eeprom.c:417: warning: Function parameter or member 'size' not described in 'tb_drom_copy_efi'

Cc: Andreas Noever <andreas.noever@gmail.com>
Cc: Michael Jamet <michael.jamet@intel.com>
Cc: Yehezkel Bernat <YehezkelShB@gmail.com>
Cc: linux-usb@vger.kernel.org
Signed-off-by: Lee Jones <lee.jones@linaro.org>
[ mw: Demote only static functions ]
Signed-off-by: Mika Westerberg <mika.westerberg@linux.intel.com>
2021-01-28 13:20:59 +03:00
Lee Jones aa60825391 thunderbolt: ctl: Demote non-conformant kernel-doc headers
Fixes the following W=1 kernel build warning(s):

 drivers/thunderbolt/ctl.c:38: warning: expecting prototype for struct tb_cfg. Prototype was for struct tb_ctl instead
 drivers/thunderbolt/ctl.c:350: warning: Function parameter or member 'ctl' not described in 'tb_ctl_tx'
 drivers/thunderbolt/ctl.c:350: warning: Function parameter or member 'data' not described in 'tb_ctl_tx'
 drivers/thunderbolt/ctl.c:350: warning: Function parameter or member 'len' not described in 'tb_ctl_tx'
 drivers/thunderbolt/ctl.c:350: warning: Function parameter or member 'type' not described in 'tb_ctl_tx'
 drivers/thunderbolt/ctl.c:350: warning: expecting prototype for tb_cfg_tx(). Prototype was for tb_ctl_tx() instead
 drivers/thunderbolt/ctl.c:383: warning: Function parameter or member 'ctl' not described in 'tb_ctl_handle_event'
 drivers/thunderbolt/ctl.c:383: warning: Function parameter or member 'type' not described in 'tb_ctl_handle_event'
 drivers/thunderbolt/ctl.c:383: warning: Function parameter or member 'pkg' not described in 'tb_ctl_handle_event'
 drivers/thunderbolt/ctl.c:383: warning: Function parameter or member 'size' not described in 'tb_ctl_handle_event'

Cc: Andreas Noever <andreas.noever@gmail.com>
Cc: Michael Jamet <michael.jamet@intel.com>
Cc: Yehezkel Bernat <YehezkelShB@gmail.com>
Cc: linux-usb@vger.kernel.org
Signed-off-by: Lee Jones <lee.jones@linaro.org>
[ mw: Demote only static functions ]
Signed-off-by: Mika Westerberg <mika.westerberg@linux.intel.com>
2021-01-28 12:55:28 +03:00
Lee Jones 4366979fdd thunderbolt: cap: Fix kernel-doc formatting issue
Fixes the following W=1 kernel build warning(s):

 drivers/thunderbolt/cap.c:189: warning: Function parameter or member 'sw' not described in 'tb_switch_find_cap'

Cc: Andreas Noever <andreas.noever@gmail.com>
Cc: Michael Jamet <michael.jamet@intel.com>
Cc: Yehezkel Bernat <YehezkelShB@gmail.com>
Cc: linux-usb@vger.kernel.org
Signed-off-by: Lee Jones <lee.jones@linaro.org>
Signed-off-by: Mika Westerberg <mika.westerberg@linux.intel.com>
2021-01-28 12:33:18 +03:00
Lee Jones f679a41faf thunderbolt: dma_port: Check 'dma_port_flash_write_block()'s return value
... and take the error path if it fails.

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

 drivers/thunderbolt/dma_port.c: In function ‘dma_port_flash_write_block’:
 drivers/thunderbolt/dma_port.c:331:6: warning: variable ‘ret’ set but not used [-Wunused-but-set-variable]

Cc: Andreas Noever <andreas.noever@gmail.com>
Cc: Michael Jamet <michael.jamet@intel.com>
Cc: Yehezkel Bernat <YehezkelShB@gmail.com>
Cc: linux-usb@vger.kernel.org
Signed-off-by: Lee Jones <lee.jones@linaro.org>
Signed-off-by: Mika Westerberg <mika.westerberg@linux.intel.com>
2021-01-28 12:33:06 +03:00
Mika Westerberg 3da88be249 thunderbolt: Add support for de-authorizing devices
In some cases it is useful to be able de-authorize devices. For example
if user logs out the userspace can have a policy that disconnects PCIe
devices until logged in again. This is only possible for software based
connection manager as it directly controls the tunnels.

For this reason make the authorized attribute accept writing 0 which
makes the software connection manager to tear down the corresponding
PCIe tunnel. Userspace can check if this is supported by reading a new
domain attribute deauthorization, that holds 1 in that case.

While there correct tb_domain_approve_switch() kernel-doc and
description of authorized attribute to mention that it is only about
PCIe tunnels.

Cc: Christian Kellner <christian@kellner.me>
Signed-off-by: Mika Westerberg <mika.westerberg@linux.intel.com>
Acked-by: Yehezkel Bernat <YehezkelShB@gmail.com>
2021-01-15 10:53:06 +03:00
Mika Westerberg fdb0887c5a thunderbolt: Start lane initialization after sleep
USB4 spec says that for TBT3 compatible device routers the connection
manager needs to set SLI (Start Lane Initialization) to get the lanes
that were not connected back to functional state after sleep. Same needs
to be done if the link was XDomain.

Signed-off-by: Mika Westerberg <mika.westerberg@linux.intel.com>
Acked-by: Yehezkel Bernat <YehezkelShB@gmail.com>
2021-01-11 17:15:42 +03:00
Rikard Falkeborn 6889e00f0e thunderbolt: Constify static attribute_group structs
The only usage of these is to put their addresses in arrays of pointers
to const attribute_groups. Make them const to allow the compiler to put
them in read-only memory.

Signed-off-by: Rikard Falkeborn <rikard.falkeborn@gmail.com>
Signed-off-by: Mika Westerberg <mika.westerberg@linux.intel.com>
2021-01-11 17:13:48 +03:00
Mika Westerberg c14556fc0c thunderbolt: Drop duplicated 0x prefix from format string
The tb_dbg() call is using %#x that already adds the 0x prefix so don't
duplicate it.

Fixes: 9039387e16 ("thunderbolt: Add USB4 router operation proxy for firmware connection manager")
Signed-off-by: Mika Westerberg <mika.westerberg@linux.intel.com>
Reviewed-by: Yehezkel Bernat <YehezkelShB@gmail.com>
2021-01-07 15:14:44 +03:00
Tian Tao 82096ecf58 thunderbolt: Use kmemdup instead of kzalloc and memcpy
Fixes coccicheck warning:
drivers/thunderbolt/dma_test.c:302:13-20: WARNING opportunity for kmemdup.

Signed-off-by: Tian Tao <tiantao6@hisilicon.com>
Signed-off-by: Mika Westerberg <mika.westerberg@linux.intel.com>
2020-12-28 12:41:53 +03:00
Greg Kroah-Hartman 3d41137801 thunderbolt: Changes for v5.11 merge window
This includes following Thunderbolt/USB4 changes for v5.11 merge window:
 
   * DMA traffic test driver
 
   * USB4 router NVM upgrade improvements
 
   * USB4 router operations proxy implementation available in the recent
     Intel Connection Manager firmwares
 
   * Support for Intel Maple Ridge discrete Thunderbolt 4 controller
 
   * A couple of cleanups and minor improvements.
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Merge tag 'thunderbolt-for-v5.11-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/westeri/thunderbolt into usb-next

Mika writes:

thunderbolt: Changes for v5.11 merge window

This includes following Thunderbolt/USB4 changes for v5.11 merge window:

  * DMA traffic test driver

  * USB4 router NVM upgrade improvements

  * USB4 router operations proxy implementation available in the recent
    Intel Connection Manager firmwares

  * Support for Intel Maple Ridge discrete Thunderbolt 4 controller

  * A couple of cleanups and minor improvements.

* tag 'thunderbolt-for-v5.11-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/westeri/thunderbolt: (22 commits)
  thunderbolt: Add support for Intel Maple Ridge
  thunderbolt: Add USB4 router operation proxy for firmware connection manager
  thunderbolt: Move constants for USB4 router operations to tb_regs.h
  thunderbolt: Add connection manager specific hooks for USB4 router operations
  thunderbolt: Pass TX and RX data directly to usb4_switch_op()
  thunderbolt: Pass metadata directly to usb4_switch_op()
  thunderbolt: Perform USB4 router NVM upgrade in two phases
  thunderbolt: Return -ENOTCONN when ERR_CONN is received
  thunderbolt: Keep the parent runtime resumed for a while on device disconnect
  thunderbolt: Log adapter numbers in decimal in path activation/deactivation
  thunderbolt: Log which connection manager implementation is used
  thunderbolt: Move max_boot_acl field to correct place in struct icm
  MAINTAINERS: Add Isaac as maintainer of Thunderbolt DMA traffic test driver
  thunderbolt: Add DMA traffic test driver
  thunderbolt: Add support for end-to-end flow control
  thunderbolt: Make it possible to allocate one directional DMA tunnel
  thunderbolt: Create debugfs directory automatically for services
  thunderbolt: Add functions for enabling and disabling lane bonding on XDomain
  thunderbolt: Add link_speed and link_width to XDomain
  thunderbolt: Create XDomain devices for loops back to the host
  ...
2020-12-08 13:41:45 +01:00
Mika Westerberg db0746e339 thunderbolt: Add support for Intel Maple Ridge
Maple Ridge is first discrete USB4 host controller from Intel. It comes
with firmware based connection manager and the flows are similar as used
in Intel Titan Ridge.

Signed-off-by: Mika Westerberg <mika.westerberg@linux.intel.com>
2020-11-30 14:39:24 +03:00
Mika Westerberg 9039387e16 thunderbolt: Add USB4 router operation proxy for firmware connection manager
Intel Maple Ridge and Tiger Lake connection manager firmware implements
a USB4 router operation proxy that should be used instead of direct
register access to avoid races with the firmware. This is supported in
all firmwares where the protocol version field returned in the driver
ready response is 3 (or higher).

This adds the USB4 router proxy operations support to the driver so that
we first check the protocol version and if it is 3 (or higher) the USB4
router operation is run through the firmware provided proxy. Otherwise
the native version is used.

Most USB4 router proxy operations are pretty straightforward except
NVM_AUTH where the firmware only responds once the router is restarted
but before it sends device connected notification. To support this we
split the operation so that the reply is received asynchronously and
stored to struct icm. This last reply is then returned in
icm_usb4_switch_nvm_authenticate_status() if available.

Signed-off-by: Mika Westerberg <mika.westerberg@linux.intel.com>
2020-11-30 14:39:24 +03:00
Mika Westerberg 579f14217c thunderbolt: Move constants for USB4 router operations to tb_regs.h
We are going to use these in subsequent patch so make them available
outside of usb4.c.

Signed-off-by: Mika Westerberg <mika.westerberg@linux.intel.com>
2020-11-30 14:39:24 +03:00
Mika Westerberg 9490f71167 thunderbolt: Add connection manager specific hooks for USB4 router operations
Intel USB4 host routers that run the firmware based connection manager
(ICM) may implement a proxy for USB4 router operations. This is to avoid
the firmware to race with the OS driver, as both may need to run these
operations.

This adds two new connection manager specific callbacks which, if
provided, get called instead of the native USB4 router operation.

Signed-off-by: Mika Westerberg <mika.westerberg@linux.intel.com>
2020-11-30 14:39:24 +03:00
Mika Westerberg 83bab44ada thunderbolt: Pass TX and RX data directly to usb4_switch_op()
We are going to make usb4_switch_op() to match better the corresponding
firmware (ICM) USB4 router operation proxy interface, so that we can use
either based on the connection manager implementation.

For this reason rename usb4_switch_op() to __usb4_switch_op() that
provides the most complete interface. Then make usb4_switch_op() and
usb4_switch_op_data() call it with correct set of parameters and update
the callers accordingly.

Signed-off-by: Mika Westerberg <mika.westerberg@linux.intel.com>
2020-11-30 14:39:24 +03:00
Mika Westerberg fe265a0631 thunderbolt: Pass metadata directly to usb4_switch_op()
We are going to make usb4_switch_op() to match better the corresponding
firmware (ICM) USB4 router operation proxy interface, so that we can use
either based on the connection manager implementation. For this reason
pass metadata directly to usb4_switch_op().

Signed-off-by: Mika Westerberg <mika.westerberg@linux.intel.com>
2020-11-30 14:39:24 +03:00
Mika Westerberg 661b19473b thunderbolt: Perform USB4 router NVM upgrade in two phases
The currect code expects that the router returns back the status of the
NVM authentication immediately. When tested against a real USB4 device
what happens is that the router is reset and only after that the result
is updated in the ROUTER_CS_26 register status field. This also seems to
align better what the spec suggests.

For this reason do the same what we already do with the Thunderbolt 3
devices and perform the NVM upgrade in two phases. First start the
NVM_AUTH router operation and once the router is added back after the
reset read the status in ROUTER_CS_26 and expose it to the userspace
accordingly.

Signed-off-by: Mika Westerberg <mika.westerberg@linux.intel.com>
2020-11-30 14:39:24 +03:00
Mika Westerberg 463e48fa54 thunderbolt: Return -ENOTCONN when ERR_CONN is received
This allows the calling code to distinguish if the error was due to
ERR_CONN (adapter is disconneced or disabled) or something else. Will be
needed in USB4 router NVM update in the following patch.

Signed-off-by: Mika Westerberg <mika.westerberg@linux.intel.com>
2020-11-30 14:39:24 +03:00
Mika Westerberg b658eb9d90 thunderbolt: Keep the parent runtime resumed for a while on device disconnect
When doing device firmware upgrade the device will disconnect for a
while and then reconnect back. Keep the parent device (and the whole
domain) powered for a while so we don't need to runtime resume
immediately when the device is connected back after the device upgrade
completes.

Signed-off-by: Mika Westerberg <mika.westerberg@linux.intel.com>
2020-11-30 14:39:23 +03:00
Mika Westerberg a359525897 thunderbolt: Log adapter numbers in decimal in path activation/deactivation
This makes it consistent with other debug logs that already are using
decimal number for adapters (ports).

Signed-off-by: Mika Westerberg <mika.westerberg@linux.intel.com>
2020-11-30 14:39:23 +03:00
Mika Westerberg e0258805d7 thunderbolt: Log which connection manager implementation is used
This makes it easier to figure out whether the driver is using firmware
or software based connection manager implementation.

Signed-off-by: Mika Westerberg <mika.westerberg@linux.intel.com>
2020-11-30 14:39:23 +03:00
Mika Westerberg 45ef561abc thunderbolt: Move max_boot_acl field to correct place in struct icm
This makes the kernel-doc to match the ordering and also this is better
place for it, not between upstream_port and vnd_cap that are used
together.

Signed-off-by: Mika Westerberg <mika.westerberg@linux.intel.com>
2020-11-30 14:39:23 +03:00
Mika Westerberg 600c0849cf thunderbolt: Fix use-after-free in remove_unplugged_switch()
Paulian reported a crash that happens when a dock is unplugged during
hibernation:

[78436.228217] thunderbolt 0-1: device disconnected
[78436.228365] BUG: kernel NULL pointer dereference, address: 00000000000001e0
...
[78436.228397] RIP: 0010:icm_free_unplugged_children+0x109/0x1a0
...
[78436.228432] Call Trace:
[78436.228439]  icm_rescan_work+0x24/0x30
[78436.228444]  process_one_work+0x1a3/0x3a0
[78436.228449]  worker_thread+0x30/0x370
[78436.228454]  ? process_one_work+0x3a0/0x3a0
[78436.228457]  kthread+0x13d/0x160
[78436.228461]  ? kthread_park+0x90/0x90
[78436.228465]  ret_from_fork+0x1f/0x30

This happens because remove_unplugged_switch() calls tb_switch_remove()
that releases the memory pointed by sw so the following lines reference
to a memory that might be released already.

Fix this by saving pointer to the parent device before calling
tb_switch_remove().

Reported-by: Paulian Bogdan Marinca <paulian@marinca.net>
Fixes: 4f7c2e0d87 ("thunderbolt: Make sure device runtime resume completes before taking domain lock")
Cc: stable@vger.kernel.org
Signed-off-by: Mika Westerberg <mika.westerberg@linux.intel.com>
Reviewed-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2020-11-19 17:44:10 +03:00
Isaac Hazan edc0f494ed thunderbolt: Add DMA traffic test driver
This driver allows sending DMA traffic over XDomain connection.
Specifically over a loopback connection using either a Thunderbolt/USB4
cable that is connected back to the host router port, or a special
loopback dongle that has RX and TX lines crossed. This can be useful at
manufacturing floor to check whether Thunderbolt/USB4 ports are
functional.

The driver exposes debugfs directory under the XDomain service that can
be used to configure the driver, start the test and check the results.

If a loopback dongle is used the steps to send and receive 1000 packets
can be done like:

  # modprobe thunderbolt_dma_test
  # echo 1000 > /sys/kernel/debug/thunderbolt/<service_id>/dma_test/packets_to_receive
  # echo 1000 > /sys/kernel/debug/thunderbolt/<service_id>/dma_test/packets_to_send
  # echo 1 > /sys/kernel/debug/thunderbolt/<service_id>/dma_test/test
  # cat /sys/kernel/debug/thunderbolt/<service_id>/dma_test/status

When a cable is connected back to host then there are two Thunderbolt
services, one is configured for receiving (does not matter which one):

  # modprobe thunderbolt_dma_test
  # echo 1000 > /sys/kernel/debug/thunderbolt/<service_a>/dma_test/packets_to_receive
  # echo 1 > /sys/kernel/debug/thunderbolt/<service_a>/dma_test/test

The other one for sending:

  # echo 1000 > /sys/kernel/debug/thunderbolt/<service_b>/dma_test/packets_to_send
  # echo 1 > /sys/kernel/debug/thunderbolt/<service_b>/dma_test/test

Results can be read from both services status attributes.

Signed-off-by: Isaac Hazan <isaac.hazan@intel.com>
Signed-off-by: Mika Westerberg <mika.westerberg@linux.intel.com>
Acked-by: Yehezkel Bernat <YehezkelShB@gmail.com>
Reviewed-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2020-11-11 10:20:16 +03:00
Mika Westerberg afe704a2d0 thunderbolt: Add support for end-to-end flow control
USB4 spec defines end-to-end (E2E) flow control that can be used between
hosts to prevent overflow of a RX ring. We previously had this partially
implemented but that code was removed with commit 53f13319d1
("thunderbolt: Get rid of E2E workaround") with the idea that we add it
back properly if there ever is need. Now that we are going to add DMA
traffic test driver (in subsequent patches) this can be useful.

For this reason we modify tb_ring_alloc_rx/tx() so that they accept
RING_FLAG_E2E and configure the hardware ring accordingly. The RX side
also requires passing TX HopID (e2e_tx_hop) used in the credit grant
packets.

Signed-off-by: Mika Westerberg <mika.westerberg@linux.intel.com>
Acked-by: Yehezkel Bernat <YehezkelShB@gmail.com>
Reviewed-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2020-11-11 10:20:16 +03:00
Mika Westerberg 5bf722df5d thunderbolt: Make it possible to allocate one directional DMA tunnel
With DMA tunnels it is possible that the service using it does not
require bi-directional paths so make RX and TX optional (but of course
one of them needs to be set).

Signed-off-by: Mika Westerberg <mika.westerberg@linux.intel.com>
Acked-by: Yehezkel Bernat <YehezkelShB@gmail.com>
Reviewed-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2020-11-11 10:20:16 +03:00
Mika Westerberg 407ac931ae thunderbolt: Create debugfs directory automatically for services
This allows service drivers to use it as parent directory if they need
to add their own debugfs entries.

Signed-off-by: Mika Westerberg <mika.westerberg@linux.intel.com>
Acked-by: Yehezkel Bernat <YehezkelShB@gmail.com>
Reviewed-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2020-11-11 10:20:16 +03:00
Isaac Hazan 5cc0df9ce1 thunderbolt: Add functions for enabling and disabling lane bonding on XDomain
These can be used by service drivers to enable and disable lane bonding
as needed.

Signed-off-by: Isaac Hazan <isaac.hazan@intel.com>
Signed-off-by: Mika Westerberg <mika.westerberg@linux.intel.com>
Acked-by: Yehezkel Bernat <YehezkelShB@gmail.com>
Reviewed-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2020-11-11 10:20:16 +03:00
Isaac Hazan 4210d50f0b thunderbolt: Add link_speed and link_width to XDomain
Link speed and link width are needed for checking expected values in
case of using a loopback service.

Signed-off-by: Isaac Hazan <isaac.hazan@intel.com>
Signed-off-by: Mika Westerberg <mika.westerberg@linux.intel.com>
Acked-by: Yehezkel Bernat <YehezkelShB@gmail.com>
Reviewed-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2020-11-11 10:20:16 +03:00
Mika Westerberg 47844ecb8c thunderbolt: Create XDomain devices for loops back to the host
It is perfectly possible to have loops back from the routers to the
host, or even from one host port to another. Instead of ignoring these,
we create XDomain devices for each. This allows creating services such
as DMA traffic test that is used in manufacturing for example.

Signed-off-by: Mika Westerberg <mika.westerberg@linux.intel.com>
Acked-by: Yehezkel Bernat <YehezkelShB@gmail.com>
Reviewed-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2020-11-11 10:20:16 +03:00
Mika Westerberg d67274bacb thunderbolt: Find XDomain by route instead of UUID
We are going to represent loops back to the host also as XDomains and
they all have the same (host) UUID, so finding them needs to use route
string instead. This also requires that we check if the XDomain device
is added to the bus before its properties can be updated. Otherwise the
remote UUID might not be populated yet.

Signed-off-by: Mika Westerberg <mika.westerberg@linux.intel.com>
Acked-by: Yehezkel Bernat <YehezkelShB@gmail.com>
Reviewed-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2020-11-11 10:20:16 +03:00
Mika Westerberg 81816f5048 thunderbolt: Do not clear USB4 router protocol adapter IFC and ISE bits
These fields are marked as vendor defined in the USB4 spec and should
not be modified by the software, so only clear them when we are dealing
with pre-USB4 hardware.

Signed-off-by: Mika Westerberg <mika.westerberg@linux.intel.com>
Acked-by: Yehezkel Bernat <YehezkelShB@gmail.com>
Reviewed-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2020-11-11 10:20:15 +03:00
Mika Westerberg f6439c531d thunderbolt: Add support for Intel Tiger Lake-H
Intel Tiger Lake-H has the same Thunderbolt/USB4 controller as Tiger
Lake-LP. Add the Tiger Lake-H PCI IDs to the driver list of supported
devices.

Signed-off-by: Mika Westerberg <mika.westerberg@linux.intel.com>
2020-11-06 16:39:11 +03:00
Mika Westerberg f8fa2c2e63 thunderbolt: Only configure USB4 wake for lane 0 adapters
Only USB4 lane 0 adapter has the USB4 port capability for wakes so only
program wakes on such adapters.

Fixes: b2911a593a ("thunderbolt: Enable wakes from system suspend")
Signed-off-by: Mika Westerberg <mika.westerberg@linux.intel.com>
2020-11-05 13:32:53 +03:00
Casey Bowman 77455129fb thunderbolt: Add uaccess dependency to debugfs interface
Some calls in the debugfs interface are made to the linux/uaccess.h header,
but the header is not referenced. So, for x86_64 architectures, this
dependency seems to be pulled in elsewhere, which leads to a successful
compilation. However, on arm/arm64 architectures, it was found to error out
on implicit declarations.

This change fixes the implicit declaration error by adding the
linux/uaccess.h header.

Fixes: 54e418106c ("thunderbolt: Add debugfs interface")
Signed-off-by: Casey Bowman <casey.g.bowman@intel.com>
Signed-off-by: Mika Westerberg <mika.westerberg@linux.intel.com>
2020-11-05 13:32:46 +03:00
Mika Westerberg a663e0df4a thunderbolt: Fix memory leak if ida_simple_get() fails in enumerate_services()
The svc->key field is not released as it should be if ida_simple_get()
fails so fix that.

Fixes: 9aabb68568 ("thunderbolt: Fix to check return value of ida_simple_get")
Cc: stable@vger.kernel.org
Signed-off-by: Mika Westerberg <mika.westerberg@linux.intel.com>
2020-11-05 13:32:40 +03:00
Jing Xiangfeng 7342ca34d9 thunderbolt: Add the missed ida_simple_remove() in ring_request_msix()
ring_request_msix() misses to call ida_simple_remove() in an error path.
Add a label 'err_ida_remove' and jump to it.

Fixes: 046bee1f9a ("thunderbolt: Add MSI-X support")
Cc: stable@vger.kernel.org
Signed-off-by: Jing Xiangfeng <jingxiangfeng@huawei.com>
Reviewed-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Signed-off-by: Mika Westerberg <mika.westerberg@linux.intel.com>
2020-10-26 18:28:14 +03:00
Greg Kroah-Hartman 59ee364baf thunderbolt: Changes for v5.10 merge window
This includes following Thunderbolt/USB4 changes for v5.10 merge window:
 
   * A couple of optimizations around Tiger Lake force power logic and
     NHI (Native Host Interface) LC (Link Controller) mailbox command
     processing
 
   * Power management improvements for Software Connection Manager
 
   * Debugfs support
 
   * Allow KUnit tests to be enabled also when Thunderbolt driver is
     configured as module.
 
   * Few minor cleanups and fixes
 
 All these have been in linux-next with no reported issues.
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Merge tag 'thunderbolt-for-v5.10-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/westeri/thunderbolt into usb-next

Mika writes:

thunderbolt: Changes for v5.10 merge window

This includes following Thunderbolt/USB4 changes for v5.10 merge window:

  * A couple of optimizations around Tiger Lake force power logic and
    NHI (Native Host Interface) LC (Link Controller) mailbox command
    processing

  * Power management improvements for Software Connection Manager

  * Debugfs support

  * Allow KUnit tests to be enabled also when Thunderbolt driver is
    configured as module.

  * Few minor cleanups and fixes

All these have been in linux-next with no reported issues.

* tag 'thunderbolt-for-v5.10-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/westeri/thunderbolt: (37 commits)
  thunderbolt: Capitalize comment on top of QUIRK_FORCE_POWER_LINK_CONTROLLER
  thunderbolt: Correct tb_check_quirks() kernel-doc
  thunderbolt: Log correct zeroX entries in decode_error()
  thunderbolt: Handle ERR_LOCK notification
  thunderbolt: Use "if USB4" instead of "depends on" in Kconfig
  thunderbolt: Allow KUnit tests to be built also when CONFIG_USB4=m
  thunderbolt: Only stop control channel when entering freeze
  thunderbolt: debugfs: Fix uninitialized return in counters_write()
  thunderbolt: Add debugfs interface
  thunderbolt: No need to warn in TB_CFG_ERROR_INVALID_CONFIG_SPACE
  thunderbolt: Introduce tb_switch_is_tiger_lake()
  thunderbolt: Introduce tb_switch_is_ice_lake()
  thunderbolt: Check for Intel vendor ID when identifying controller
  thunderbolt: Introduce tb_port_is_nhi()
  thunderbolt: Introduce tb_switch_next_cap()
  thunderbolt: Introduce tb_port_next_cap()
  thunderbolt: Move struct tb_cap_any to tb_regs.h
  thunderbolt: Add runtime PM for Software CM
  thunderbolt: Create device links from ACPI description
  ACPI: Export acpi_get_first_physical_node() to modules
  ...
2020-09-30 09:42:36 +02:00
Mika Westerberg 810278da90 thunderbolt: Capitalize comment on top of QUIRK_FORCE_POWER_LINK_CONTROLLER
To keep it consistent with the other single line comments in the driver.

Signed-off-by: Mika Westerberg <mika.westerberg@linux.intel.com>
2020-09-16 14:57:46 +03:00