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Subject[PATCH v2 00/28] thunderbolt: Software connection manager improvements
Date
Hi,

Software connection manager (drivers/thunderbolt/tb.c) is used on older
Apple hardware with Light Ridge, Cactus Ridge or Falcon Ridge controllers
to create PCIe tunnels when a Thunderbolt device is connected. Currently
only one PCIe tunnel is supported. On newer Alpine Ridge based Apple
systems the driver starts the firmware which then takes care creating
tunnels.

This series improves the software connection manager so that it will
support:

- Full PCIe daisy chains (up to 6 devices)
- Display Port tunneling
- P2P networking

We also add support for Titan Ridge based Apple systems where we can use
the same flows than with Alpine Ridge to start the firmware.

Note in order to prevent possible DMA attacks on these systems we should
make sure IOMMU is enabled. One option is to force dmar_platform_optin()
return true on Apple hardware. However, it is not part of this series. I'm
trusting people using Linux on such systems to take care of it. :-)

Previous version of the patch series can be viewed here:

https://lkml.org/lkml/2019/1/29/924

Changes from v1:

* Added ACK from David

* Add constant (TMU_ACCESS_EN) for BIT(20) when TMU access is enabled. We
keep it in cap.c close to the LR/ER workaround. Also we enable/disable
only during capability walk. If it turns we need to have it enabled
elsewhere we can move it to switch.c and enable just once during
switch enumeration.

* Use 0 to mean no cap_adap instead of negative value. This follows
cap_phy.

* Use correct PCI IDs (_BRIDGE) in the last patch where we start firmware
on Titan Ridge. It wrongly used NHI PCI IDs in v1.

Mika Westerberg (28):
net: thunderbolt: Unregister ThunderboltIP protocol handler when suspending
thunderbolt: Do not allocate switch if depth is greater than 6
thunderbolt: Enable TMU access when accessing port space on legacy devices
thunderbolt: Add dummy read after port capability list walk on Light Ridge
thunderbolt: Move LC specific functionality into a separate file
thunderbolt: Configure lanes when switch is initialized
thunderbolt: Set sleep bit when suspending switch
thunderbolt: Properly disable path
thunderbolt: Cache adapter specific capability offset into struct port
thunderbolt: Rename tunnel_pci to tunnel
thunderbolt: Generalize tunnel creation functionality
thunderbolt: Add functions for allocating and releasing hop IDs
thunderbolt: Add helper function to iterate from one port to another
thunderbolt: Extend tunnel creation to more than 2 adjacent switches
thunderbolt: Deactivate all paths before restarting them
thunderbolt: Discover preboot PCIe paths the boot firmware established
thunderbolt: Add support for full PCIe daisy chains
thunderbolt: Scan only valid NULL adapter ports in hotplug
thunderbolt: Generalize port finding routines to support all port types
thunderbolt: Rework NFC credits handling
thunderbolt: Add support for Display Port tunnels
thunderbolt: Run tb_xdp_handle_request() in system workqueue
thunderbolt: Add XDomain UUID exchange support
thunderbolt: Add support for DMA tunnels
thunderbolt: Make tb_switch_alloc() return ERR_PTR()
thunderbolt: Add support for XDomain connections
thunderbolt: Make rest of the logging to happen at debug level
thunderbolt: Start firmware on Titan Ridge Apple systems

drivers/net/thunderbolt.c | 3 +
drivers/thunderbolt/Makefile | 4 +-
drivers/thunderbolt/cap.c | 90 +++-
drivers/thunderbolt/ctl.c | 2 +-
drivers/thunderbolt/icm.c | 15 +-
drivers/thunderbolt/lc.c | 179 ++++++++
drivers/thunderbolt/path.c | 326 +++++++++++++--
drivers/thunderbolt/switch.c | 466 ++++++++++++++++++---
drivers/thunderbolt/tb.c | 529 ++++++++++++++++++------
drivers/thunderbolt/tb.h | 67 ++-
drivers/thunderbolt/tb_msgs.h | 11 +
drivers/thunderbolt/tb_regs.h | 50 ++-
drivers/thunderbolt/tunnel.c | 681 +++++++++++++++++++++++++++++++
drivers/thunderbolt/tunnel.h | 75 ++++
drivers/thunderbolt/tunnel_pci.c | 226 ----------
drivers/thunderbolt/tunnel_pci.h | 31 --
drivers/thunderbolt/xdomain.c | 142 ++++++-
include/linux/thunderbolt.h | 8 +
18 files changed, 2389 insertions(+), 516 deletions(-)
create mode 100644 drivers/thunderbolt/lc.c
create mode 100644 drivers/thunderbolt/tunnel.c
create mode 100644 drivers/thunderbolt/tunnel.h
delete mode 100644 drivers/thunderbolt/tunnel_pci.c
delete mode 100644 drivers/thunderbolt/tunnel_pci.h

--
2.20.1

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