[PATCH v3] IBM CXL Flash Adapter

[PATCH v3] IBM CXL Flash Adapter

[Matthew R. Ochs]

This patch adds support for the IBM CXL flash (cxlflash) adapter. The device
is presented to the system as a SCSI adapter and may be accessed and used via
the normal filesystem paths.

Note that the patch is dependent on support that has not yet been merged
in with the mainline (upstream process started).

In the interim, this code may be found on Github:

  https://github.com/mikey/linux/tree/cxl/kernelapi

v3 Changes:
- Incorporate Brian King review comments
- Update to latest candidate upstream CXL APIs
- Add several clarification comments
- Use debug facilities in linux/bug.h
- Correct a potential command corruption bug
- Refine SCSI error handling/reporting
- Serialize TMF events
- Remove unnecessary debug prints, parenthesis, and volatile keywords
- Update afu->room where appropriate
- Sleep instead of busy-wait for command completion
- Serialize AFU sync events, ensure process context only
- Pack structures shared with hardware

v2 Changes:
- Incorporate Mikey Neuling review comments
- Update to candidate upstream CXL APIs
- Add several clarification comments
- Renamed some structures for clarity
- Removed the 'cxlflash' prefix from internal functions
- Address endianness concerns/issues
- Remove unused code
- Revert to using pr_*/dev_* print services
- Remove unneeded locking and barrier instructions

Matthew R. Ochs (1):
  cxlflash: Base support for IBM CXL Flash Adapter

 drivers/scsi/Kconfig            |    1 +
 drivers/scsi/Makefile           |    1 +
 drivers/scsi/cxlflash/Kconfig   |   11 +
 drivers/scsi/cxlflash/Makefile  |    2 +
 drivers/scsi/cxlflash/common.h  |  177 ++++
 drivers/scsi/cxlflash/main.c    | 2215 +++++++++++++++++++++++++++++++++++++++
 drivers/scsi/cxlflash/main.h    |  109 ++
 drivers/scsi/cxlflash/sislite.h |  465 ++++++++
 8 files changed, 2981 insertions(+)
 create mode 100644 drivers/scsi/cxlflash/Kconfig
 create mode 100644 drivers/scsi/cxlflash/Makefile
 create mode 100644 drivers/scsi/cxlflash/common.h
 create mode 100644 drivers/scsi/cxlflash/main.c
 create mode 100644 drivers/scsi/cxlflash/main.h
 create mode 100755 drivers/scsi/cxlflash/sislite.h

-- 
2.1.0