From: Logan Gunthorpe > 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. Patches 5..16 (also 5 [was 6], and 14, objections notwithstanding): Acked-by: Allen Hubbe <Allen.Hubbe@xxxxxxxx> > -- > > 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_v3 > > *** BLURB HERE *** > > Logan Gunthorpe (16): > switchtec: move structure definitions into a common header > switchtec: export class symbol for use in upper layer driver > switchtec: add NTB hardware register definitions > switchtec: add link event notifier callback > ntb: ntb_test: ensure the link is up before trying to configure the > mws > 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() > switchtec_ntb: introduce initial NTB driver > switchtec_ntb: initialize hardware for memory windows > switchtec_ntb: initialize hardware for doorbells and messages > switchtec_ntb: add skeleton NTB driver > switchtec_ntb: add link management > switchtec_ntb: implement doorbell registers > switchtec_ntb: implement scratchpad registers > switchtec_ntb: add memory window support > 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/switchtec_ntb.c | 1211 +++++++++++++++++++++++++++++++ > 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 ++++++++++ > tools/testing/selftests/ntb/ntb_test.sh | 4 + > 14 files changed, 1702 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/switchtec_ntb.c > create mode 100644 include/linux/switchtec.h > > -- > 2.11.0
