[0/6] CXL core reorganization

Message

Ben Widawsky July 15, 2021, 7:41 p.m. UTC

The main motivation of the patch series is to establish the cxl_core driver in
its own directory and modularize it. Specifically, the patch series aims to
achieve three things:
1. Move existing core functionality to a new directory.
2. Split existing core functionality into multiple files.
3. Migrate memdev functionality into core.

#1 is trivially accomplished with git mv. The file itself is renamed back to
bus.c since the goal is to break up core functionality into multiple files, and
so the name core.c doesn't make sense in that context.

#2 is also trivially accomplished via cut/paste.

#3 is slightly invasive in that it has certain functional changes to improve the
existing interfaces and make them more generic. The rest of the change is
cut/paste. This is also the only part of the series which has runtime functional
change in that some interfaces are removed from cxl_pci, moved into cxl_core,
and exported for other drivers to use.

Ben Widawsky (6):
  cxl: Move cxl_core to new directory
  cxl/core: Improve CXL core kernel docs
  cxl/core: Extract register and pmem functionality
  cxl/mem: Move character device region creation
  cxl: Pass fops and shutdown to memdev creation
  cxl/core: Move memdev management to core

 .../driver-api/cxl/memory-devices.rst         |   8 +-
 drivers/cxl/Makefile                          |   2 +-
 drivers/cxl/{core.c => core/bus.c}            | 458 +-----------------
 drivers/cxl/core/core.h                       |  20 +
 drivers/cxl/core/memdev.c                     | 224 +++++++++
 drivers/cxl/core/pmem.c                       | 201 ++++++++
 drivers/cxl/core/regs.c                       | 235 +++++++++
 drivers/cxl/mem.h                             |   9 +
 drivers/cxl/pci.c                             | 239 +--------
 9 files changed, 731 insertions(+), 665 deletions(-)
 rename drivers/cxl/{core.c => core/bus.c} (58%)
 create mode 100644 drivers/cxl/core/core.h
 create mode 100644 drivers/cxl/core/memdev.c
 create mode 100644 drivers/cxl/core/pmem.c
 create mode 100644 drivers/cxl/core/regs.c