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    Subject[PATCH v4 00/15] Switchtec NTB Support
    Changes since v3:

    - Rebased onto the Jon's ntb branch that contains one of the patches
    that was in v3
    - Various spelling and commit log mistakes noticed by Bjorn
    - Renamed switchtec_ntb to ntb_hw_switchtec per Dave's suggestion
    - Fixed a number of code nits pointed out by Jon

    --

    Changes since v2:

    - Reordered the ntb_test link patch per Allen
    - Removed an extra call to switchtec_ntb_init_mw
    - Fixed a typo in the switchtec.txt documentation.

    --

    Changes since v1:

    - Rebased onto latest ntb-next branch (with v4.13-rc1)
    - Reworked ntb_mw_count() function so that it can be called all the
    time (per discussion with Allen)
    - Various spelling and formatting cleanups from Bjorn
    - Added request_module() call such that the NTB module is automatically
    loaded when appropriate hardware exists.

    --

    Changes since the rfc:

    - Rebased on ntb-next
    - Switched ntb_part_op to use sleep instead of delay
    - Dropped a number of useless dbg __func__ prints
    - Went back to the dynamic instead of the static class
    - Swapped the notifier block for a simple callback
    - Modified the new ntb api so that a couple functions with pidx
    now must be called after link up. Per our discussion on the list.

    --

    This patchset implements Non-Transparent Bridge (NTB) support for the
    Microsemi Switchtec series of switches. We're looking for some
    review from the community at this point but hope to get it upstreamed
    for v4.14.

    Switchtec NTB support is configured over the same function and bar
    as the management endpoint. Thus, the new driver hooks into the
    management driver which we had merged in v4.12. We use the class
    interface API to register an NTB device for every switchtec device
    which supports NTB (not all do).

    The Switchtec hardware supports doorbells, memory windows and messages.
    Seeing there is no native scratchpad support, 128 spads are emulated
    through the use of a pre-setup memory window. The switch has 64
    doorbells which are shared between the two partitions and a
    configurable set of memory windows. While the hardware supports more
    than 2 partitions, this driver only supports the first two seeing
    the current NTB API only supports two hosts.

    The driver has been tested with ntb_netdev and fully passes the
    ntb_test script.

    This patchset is based off of ntb-next and can be found in this
    git repo:

    https://github.com/sbates130272/linux-p2pmem.git switchtec_ntb_v4

    Logan Gunthorpe (15):
    NTB: switchtec: Move structure definitions into a common header
    NTB: switchtec: Export class symbol for use in upper layer driver
    NTB: switchtec: Add NTB hardware register definitions
    NTB: switchtec: Add link event notifier callback
    NTB: Ensure ntb_mw_get_align() is only called when the link is up
    NTB: Add check and comment for link up to mw_count() and
    mw_get_align()
    NTB: switchtec_ntb: Introduce initial NTB driver
    NTB: switchtec_ntb: Initialize hardware for memory windows
    NTB: switchtec_ntb: Initialize hardware for doorbells and messages
    NTB: switchtec_ntb: Add skeleton NTB driver
    NTB: switchtec_ntb: Add link management
    NTB: switchtec_ntb: Implement doorbell registers
    NTB: switchtec_ntb: Implement scratchpad registers
    NTB: switchtec_ntb: Add memory window support
    NTB: switchtec_ntb: Update switchtec documentation with notes for NTB

    Documentation/switchtec.txt | 12 +
    MAINTAINERS | 2 +
    drivers/ntb/hw/Kconfig | 1 +
    drivers/ntb/hw/Makefile | 1 +
    drivers/ntb/hw/mscc/Kconfig | 9 +
    drivers/ntb/hw/mscc/Makefile | 1 +
    drivers/ntb/hw/mscc/ntb_hw_switchtec.c | 1216 ++++++++++++++++++++++++++++++++
    drivers/ntb/ntb_transport.c | 20 +-
    drivers/ntb/test/ntb_perf.c | 18 +-
    drivers/ntb/test/ntb_tool.c | 6 +-
    drivers/pci/switch/switchtec.c | 316 ++-------
    include/linux/ntb.h | 11 +-
    include/linux/switchtec.h | 373 ++++++++++
    13 files changed, 1703 insertions(+), 283 deletions(-)
    create mode 100644 drivers/ntb/hw/mscc/Kconfig
    create mode 100644 drivers/ntb/hw/mscc/Makefile
    create mode 100644 drivers/ntb/hw/mscc/ntb_hw_switchtec.c
    create mode 100644 include/linux/switchtec.h

    --
    2.11.0

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